Example_RTOS - Rtos API example

Users » marcozecchini » Code » Example_RTOS

Rtos API example

mbed-os/features/mbedtls/src/ssl_tls.c@0:9fca2b23d0ba, 2019-02-23 (annotated)

Committer:: marcozecchini
Date:: Sat Feb 23 12:13:36 2019 +0000
Revision:: 0:9fca2b23d0ba

final commit

Who changed what in which revision?

User	Revision	Line number	New contents of line
marcozecchini	0:9fca2b23d0ba	1	/*
marcozecchini	0:9fca2b23d0ba	2	* SSLv3/TLSv1 shared functions
marcozecchini	0:9fca2b23d0ba	3	*
marcozecchini	0:9fca2b23d0ba	4	* Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
marcozecchini	0:9fca2b23d0ba	5	* SPDX-License-Identifier: Apache-2.0
marcozecchini	0:9fca2b23d0ba	6	*
marcozecchini	0:9fca2b23d0ba	7	* Licensed under the Apache License, Version 2.0 (the "License"); you may
marcozecchini	0:9fca2b23d0ba	8	* not use this file except in compliance with the License.
marcozecchini	0:9fca2b23d0ba	9	* You may obtain a copy of the License at
marcozecchini	0:9fca2b23d0ba	10	*
marcozecchini	0:9fca2b23d0ba	11	* http://www.apache.org/licenses/LICENSE-2.0
marcozecchini	0:9fca2b23d0ba	12	*
marcozecchini	0:9fca2b23d0ba	13	* Unless required by applicable law or agreed to in writing, software
marcozecchini	0:9fca2b23d0ba	14	* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
marcozecchini	0:9fca2b23d0ba	15	* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
marcozecchini	0:9fca2b23d0ba	16	* See the License for the specific language governing permissions and
marcozecchini	0:9fca2b23d0ba	17	* limitations under the License.
marcozecchini	0:9fca2b23d0ba	18	*
marcozecchini	0:9fca2b23d0ba	19	* This file is part of mbed TLS (https://tls.mbed.org)
marcozecchini	0:9fca2b23d0ba	20	*/
marcozecchini	0:9fca2b23d0ba	21	/*
marcozecchini	0:9fca2b23d0ba	22	* The SSL 3.0 specification was drafted by Netscape in 1996,
marcozecchini	0:9fca2b23d0ba	23	* and became an IETF standard in 1999.
marcozecchini	0:9fca2b23d0ba	24	*
marcozecchini	0:9fca2b23d0ba	25	* http://wp.netscape.com/eng/ssl3/
marcozecchini	0:9fca2b23d0ba	26	* http://www.ietf.org/rfc/rfc2246.txt
marcozecchini	0:9fca2b23d0ba	27	* http://www.ietf.org/rfc/rfc4346.txt
marcozecchini	0:9fca2b23d0ba	28	*/
marcozecchini	0:9fca2b23d0ba	29
marcozecchini	0:9fca2b23d0ba	30	#if !defined(MBEDTLS_CONFIG_FILE)
marcozecchini	0:9fca2b23d0ba	31	#include "mbedtls/config.h"
marcozecchini	0:9fca2b23d0ba	32	#else
marcozecchini	0:9fca2b23d0ba	33	#include MBEDTLS_CONFIG_FILE
marcozecchini	0:9fca2b23d0ba	34	#endif
marcozecchini	0:9fca2b23d0ba	35
marcozecchini	0:9fca2b23d0ba	36	#if defined(MBEDTLS_SSL_TLS_C)
marcozecchini	0:9fca2b23d0ba	37
marcozecchini	0:9fca2b23d0ba	38	#if defined(MBEDTLS_PLATFORM_C)
marcozecchini	0:9fca2b23d0ba	39	#include "mbedtls/platform.h"
marcozecchini	0:9fca2b23d0ba	40	#else
marcozecchini	0:9fca2b23d0ba	41	#include <stdlib.h>
marcozecchini	0:9fca2b23d0ba	42	#define mbedtls_calloc calloc
marcozecchini	0:9fca2b23d0ba	43	#define mbedtls_free free
marcozecchini	0:9fca2b23d0ba	44	#endif
marcozecchini	0:9fca2b23d0ba	45
marcozecchini	0:9fca2b23d0ba	46	#include "mbedtls/debug.h"
marcozecchini	0:9fca2b23d0ba	47	#include "mbedtls/ssl.h"
marcozecchini	0:9fca2b23d0ba	48	#include "mbedtls/ssl_internal.h"
marcozecchini	0:9fca2b23d0ba	49
marcozecchini	0:9fca2b23d0ba	50	#include <string.h>
marcozecchini	0:9fca2b23d0ba	51
marcozecchini	0:9fca2b23d0ba	52	#if defined(MBEDTLS_X509_CRT_PARSE_C)
marcozecchini	0:9fca2b23d0ba	53	#include "mbedtls/oid.h"
marcozecchini	0:9fca2b23d0ba	54	#endif
marcozecchini	0:9fca2b23d0ba	55
marcozecchini	0:9fca2b23d0ba	56	/* Implementation that should never be optimized out by the compiler */
marcozecchini	0:9fca2b23d0ba	57	static void mbedtls_zeroize( void *v, size_t n ) {
marcozecchini	0:9fca2b23d0ba	58	volatile unsigned char p = v; while( n-- ) p++ = 0;
marcozecchini	0:9fca2b23d0ba	59	}
marcozecchini	0:9fca2b23d0ba	60
marcozecchini	0:9fca2b23d0ba	61	/* Length of the "epoch" field in the record header */
marcozecchini	0:9fca2b23d0ba	62	static inline size_t ssl_ep_len( const mbedtls_ssl_context *ssl )
marcozecchini	0:9fca2b23d0ba	63	{
marcozecchini	0:9fca2b23d0ba	64	#if defined(MBEDTLS_SSL_PROTO_DTLS)
marcozecchini	0:9fca2b23d0ba	65	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
marcozecchini	0:9fca2b23d0ba	66	return( 2 );
marcozecchini	0:9fca2b23d0ba	67	#else
marcozecchini	0:9fca2b23d0ba	68	((void) ssl);
marcozecchini	0:9fca2b23d0ba	69	#endif
marcozecchini	0:9fca2b23d0ba	70	return( 0 );
marcozecchini	0:9fca2b23d0ba	71	}
marcozecchini	0:9fca2b23d0ba	72
marcozecchini	0:9fca2b23d0ba	73	/*
marcozecchini	0:9fca2b23d0ba	74	* Start a timer.
marcozecchini	0:9fca2b23d0ba	75	* Passing millisecs = 0 cancels a running timer.
marcozecchini	0:9fca2b23d0ba	76	*/
marcozecchini	0:9fca2b23d0ba	77	static void ssl_set_timer( mbedtls_ssl_context *ssl, uint32_t millisecs )
marcozecchini	0:9fca2b23d0ba	78	{
marcozecchini	0:9fca2b23d0ba	79	if( ssl->f_set_timer == NULL )
marcozecchini	0:9fca2b23d0ba	80	return;
marcozecchini	0:9fca2b23d0ba	81
marcozecchini	0:9fca2b23d0ba	82	MBEDTLS_SSL_DEBUG_MSG( 3, ( "set_timer to %d ms", (int) millisecs ) );
marcozecchini	0:9fca2b23d0ba	83	ssl->f_set_timer( ssl->p_timer, millisecs / 4, millisecs );
marcozecchini	0:9fca2b23d0ba	84	}
marcozecchini	0:9fca2b23d0ba	85
marcozecchini	0:9fca2b23d0ba	86	/*
marcozecchini	0:9fca2b23d0ba	87	* Return -1 is timer is expired, 0 if it isn't.
marcozecchini	0:9fca2b23d0ba	88	*/
marcozecchini	0:9fca2b23d0ba	89	static int ssl_check_timer( mbedtls_ssl_context *ssl )
marcozecchini	0:9fca2b23d0ba	90	{
marcozecchini	0:9fca2b23d0ba	91	if( ssl->f_get_timer == NULL )
marcozecchini	0:9fca2b23d0ba	92	return( 0 );
marcozecchini	0:9fca2b23d0ba	93
marcozecchini	0:9fca2b23d0ba	94	if( ssl->f_get_timer( ssl->p_timer ) == 2 )
marcozecchini	0:9fca2b23d0ba	95	{
marcozecchini	0:9fca2b23d0ba	96	MBEDTLS_SSL_DEBUG_MSG( 3, ( "timer expired" ) );
marcozecchini	0:9fca2b23d0ba	97	return( -1 );
marcozecchini	0:9fca2b23d0ba	98	}
marcozecchini	0:9fca2b23d0ba	99
marcozecchini	0:9fca2b23d0ba	100	return( 0 );
marcozecchini	0:9fca2b23d0ba	101	}
marcozecchini	0:9fca2b23d0ba	102
marcozecchini	0:9fca2b23d0ba	103	#if defined(MBEDTLS_SSL_PROTO_DTLS)
marcozecchini	0:9fca2b23d0ba	104	/*
marcozecchini	0:9fca2b23d0ba	105	* Double the retransmit timeout value, within the allowed range,
marcozecchini	0:9fca2b23d0ba	106	* returning -1 if the maximum value has already been reached.
marcozecchini	0:9fca2b23d0ba	107	*/
marcozecchini	0:9fca2b23d0ba	108	static int ssl_double_retransmit_timeout( mbedtls_ssl_context *ssl )
marcozecchini	0:9fca2b23d0ba	109	{
marcozecchini	0:9fca2b23d0ba	110	uint32_t new_timeout;
marcozecchini	0:9fca2b23d0ba	111
marcozecchini	0:9fca2b23d0ba	112	if( ssl->handshake->retransmit_timeout >= ssl->conf->hs_timeout_max )
marcozecchini	0:9fca2b23d0ba	113	return( -1 );
marcozecchini	0:9fca2b23d0ba	114
marcozecchini	0:9fca2b23d0ba	115	new_timeout = 2 * ssl->handshake->retransmit_timeout;
marcozecchini	0:9fca2b23d0ba	116
marcozecchini	0:9fca2b23d0ba	117	/* Avoid arithmetic overflow and range overflow */
marcozecchini	0:9fca2b23d0ba	118	if( new_timeout < ssl->handshake->retransmit_timeout \|\|
marcozecchini	0:9fca2b23d0ba	119	new_timeout > ssl->conf->hs_timeout_max )
marcozecchini	0:9fca2b23d0ba	120	{
marcozecchini	0:9fca2b23d0ba	121	new_timeout = ssl->conf->hs_timeout_max;
marcozecchini	0:9fca2b23d0ba	122	}
marcozecchini	0:9fca2b23d0ba	123
marcozecchini	0:9fca2b23d0ba	124	ssl->handshake->retransmit_timeout = new_timeout;
marcozecchini	0:9fca2b23d0ba	125	MBEDTLS_SSL_DEBUG_MSG( 3, ( "update timeout value to %d millisecs",
marcozecchini	0:9fca2b23d0ba	126	ssl->handshake->retransmit_timeout ) );
marcozecchini	0:9fca2b23d0ba	127
marcozecchini	0:9fca2b23d0ba	128	return( 0 );
marcozecchini	0:9fca2b23d0ba	129	}
marcozecchini	0:9fca2b23d0ba	130
marcozecchini	0:9fca2b23d0ba	131	static void ssl_reset_retransmit_timeout( mbedtls_ssl_context *ssl )
marcozecchini	0:9fca2b23d0ba	132	{
marcozecchini	0:9fca2b23d0ba	133	ssl->handshake->retransmit_timeout = ssl->conf->hs_timeout_min;
marcozecchini	0:9fca2b23d0ba	134	MBEDTLS_SSL_DEBUG_MSG( 3, ( "update timeout value to %d millisecs",
marcozecchini	0:9fca2b23d0ba	135	ssl->handshake->retransmit_timeout ) );
marcozecchini	0:9fca2b23d0ba	136	}
marcozecchini	0:9fca2b23d0ba	137	#endif /* MBEDTLS_SSL_PROTO_DTLS */
marcozecchini	0:9fca2b23d0ba	138
marcozecchini	0:9fca2b23d0ba	139	#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
marcozecchini	0:9fca2b23d0ba	140	/*
marcozecchini	0:9fca2b23d0ba	141	* Convert max_fragment_length codes to length.
marcozecchini	0:9fca2b23d0ba	142	* RFC 6066 says:
marcozecchini	0:9fca2b23d0ba	143	* enum{
marcozecchini	0:9fca2b23d0ba	144	* 2^9(1), 2^10(2), 2^11(3), 2^12(4), (255)
marcozecchini	0:9fca2b23d0ba	145	* } MaxFragmentLength;
marcozecchini	0:9fca2b23d0ba	146	* and we add 0 -> extension unused
marcozecchini	0:9fca2b23d0ba	147	*/
marcozecchini	0:9fca2b23d0ba	148	static unsigned int mfl_code_to_length[MBEDTLS_SSL_MAX_FRAG_LEN_INVALID] =
marcozecchini	0:9fca2b23d0ba	149	{
marcozecchini	0:9fca2b23d0ba	150	MBEDTLS_SSL_MAX_CONTENT_LEN, /* MBEDTLS_SSL_MAX_FRAG_LEN_NONE */
marcozecchini	0:9fca2b23d0ba	151	512, /* MBEDTLS_SSL_MAX_FRAG_LEN_512 */
marcozecchini	0:9fca2b23d0ba	152	1024, /* MBEDTLS_SSL_MAX_FRAG_LEN_1024 */
marcozecchini	0:9fca2b23d0ba	153	2048, /* MBEDTLS_SSL_MAX_FRAG_LEN_2048 */
marcozecchini	0:9fca2b23d0ba	154	4096, /* MBEDTLS_SSL_MAX_FRAG_LEN_4096 */
marcozecchini	0:9fca2b23d0ba	155	};
marcozecchini	0:9fca2b23d0ba	156	#endif /* MBEDTLS_SSL_MAX_FRAGMENT_LENGTH */
marcozecchini	0:9fca2b23d0ba	157
marcozecchini	0:9fca2b23d0ba	158	#if defined(MBEDTLS_SSL_CLI_C)
marcozecchini	0:9fca2b23d0ba	159	static int ssl_session_copy( mbedtls_ssl_session dst, const mbedtls_ssl_session src )
marcozecchini	0:9fca2b23d0ba	160	{
marcozecchini	0:9fca2b23d0ba	161	mbedtls_ssl_session_free( dst );
marcozecchini	0:9fca2b23d0ba	162	memcpy( dst, src, sizeof( mbedtls_ssl_session ) );
marcozecchini	0:9fca2b23d0ba	163
marcozecchini	0:9fca2b23d0ba	164	#if defined(MBEDTLS_X509_CRT_PARSE_C)
marcozecchini	0:9fca2b23d0ba	165	if( src->peer_cert != NULL )
marcozecchini	0:9fca2b23d0ba	166	{
marcozecchini	0:9fca2b23d0ba	167	int ret;
marcozecchini	0:9fca2b23d0ba	168
marcozecchini	0:9fca2b23d0ba	169	dst->peer_cert = mbedtls_calloc( 1, sizeof(mbedtls_x509_crt) );
marcozecchini	0:9fca2b23d0ba	170	if( dst->peer_cert == NULL )
marcozecchini	0:9fca2b23d0ba	171	return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
marcozecchini	0:9fca2b23d0ba	172
marcozecchini	0:9fca2b23d0ba	173	mbedtls_x509_crt_init( dst->peer_cert );
marcozecchini	0:9fca2b23d0ba	174
marcozecchini	0:9fca2b23d0ba	175	if( ( ret = mbedtls_x509_crt_parse_der( dst->peer_cert, src->peer_cert->raw.p,
marcozecchini	0:9fca2b23d0ba	176	src->peer_cert->raw.len ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	177	{
marcozecchini	0:9fca2b23d0ba	178	mbedtls_free( dst->peer_cert );
marcozecchini	0:9fca2b23d0ba	179	dst->peer_cert = NULL;
marcozecchini	0:9fca2b23d0ba	180	return( ret );
marcozecchini	0:9fca2b23d0ba	181	}
marcozecchini	0:9fca2b23d0ba	182	}
marcozecchini	0:9fca2b23d0ba	183	#endif /* MBEDTLS_X509_CRT_PARSE_C */
marcozecchini	0:9fca2b23d0ba	184
marcozecchini	0:9fca2b23d0ba	185	#if defined(MBEDTLS_SSL_SESSION_TICKETS) && defined(MBEDTLS_SSL_CLI_C)
marcozecchini	0:9fca2b23d0ba	186	if( src->ticket != NULL )
marcozecchini	0:9fca2b23d0ba	187	{
marcozecchini	0:9fca2b23d0ba	188	dst->ticket = mbedtls_calloc( 1, src->ticket_len );
marcozecchini	0:9fca2b23d0ba	189	if( dst->ticket == NULL )
marcozecchini	0:9fca2b23d0ba	190	return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
marcozecchini	0:9fca2b23d0ba	191
marcozecchini	0:9fca2b23d0ba	192	memcpy( dst->ticket, src->ticket, src->ticket_len );
marcozecchini	0:9fca2b23d0ba	193	}
marcozecchini	0:9fca2b23d0ba	194	#endif /* MBEDTLS_SSL_SESSION_TICKETS && MBEDTLS_SSL_CLI_C */
marcozecchini	0:9fca2b23d0ba	195
marcozecchini	0:9fca2b23d0ba	196	return( 0 );
marcozecchini	0:9fca2b23d0ba	197	}
marcozecchini	0:9fca2b23d0ba	198	#endif /* MBEDTLS_SSL_CLI_C */
marcozecchini	0:9fca2b23d0ba	199
marcozecchini	0:9fca2b23d0ba	200	#if defined(MBEDTLS_SSL_HW_RECORD_ACCEL)
marcozecchini	0:9fca2b23d0ba	201	int (mbedtls_ssl_hw_record_init)( mbedtls_ssl_context ssl,
marcozecchini	0:9fca2b23d0ba	202	const unsigned char key_enc, const unsigned char key_dec,
marcozecchini	0:9fca2b23d0ba	203	size_t keylen,
marcozecchini	0:9fca2b23d0ba	204	const unsigned char iv_enc, const unsigned char iv_dec,
marcozecchini	0:9fca2b23d0ba	205	size_t ivlen,
marcozecchini	0:9fca2b23d0ba	206	const unsigned char mac_enc, const unsigned char mac_dec,
marcozecchini	0:9fca2b23d0ba	207	size_t maclen ) = NULL;
marcozecchini	0:9fca2b23d0ba	208	int (mbedtls_ssl_hw_record_activate)( mbedtls_ssl_context ssl, int direction) = NULL;
marcozecchini	0:9fca2b23d0ba	209	int (mbedtls_ssl_hw_record_reset)( mbedtls_ssl_context ssl ) = NULL;
marcozecchini	0:9fca2b23d0ba	210	int (mbedtls_ssl_hw_record_write)( mbedtls_ssl_context ssl ) = NULL;
marcozecchini	0:9fca2b23d0ba	211	int (mbedtls_ssl_hw_record_read)( mbedtls_ssl_context ssl ) = NULL;
marcozecchini	0:9fca2b23d0ba	212	int (mbedtls_ssl_hw_record_finish)( mbedtls_ssl_context ssl ) = NULL;
marcozecchini	0:9fca2b23d0ba	213	#endif /* MBEDTLS_SSL_HW_RECORD_ACCEL */
marcozecchini	0:9fca2b23d0ba	214
marcozecchini	0:9fca2b23d0ba	215	/*
marcozecchini	0:9fca2b23d0ba	216	* Key material generation
marcozecchini	0:9fca2b23d0ba	217	*/
marcozecchini	0:9fca2b23d0ba	218	#if defined(MBEDTLS_SSL_PROTO_SSL3)
marcozecchini	0:9fca2b23d0ba	219	static int ssl3_prf( const unsigned char *secret, size_t slen,
marcozecchini	0:9fca2b23d0ba	220	const char *label,
marcozecchini	0:9fca2b23d0ba	221	const unsigned char *random, size_t rlen,
marcozecchini	0:9fca2b23d0ba	222	unsigned char *dstbuf, size_t dlen )
marcozecchini	0:9fca2b23d0ba	223	{
marcozecchini	0:9fca2b23d0ba	224	size_t i;
marcozecchini	0:9fca2b23d0ba	225	mbedtls_md5_context md5;
marcozecchini	0:9fca2b23d0ba	226	mbedtls_sha1_context sha1;
marcozecchini	0:9fca2b23d0ba	227	unsigned char padding[16];
marcozecchini	0:9fca2b23d0ba	228	unsigned char sha1sum[20];
marcozecchini	0:9fca2b23d0ba	229	((void)label);
marcozecchini	0:9fca2b23d0ba	230
marcozecchini	0:9fca2b23d0ba	231	mbedtls_md5_init( &md5 );
marcozecchini	0:9fca2b23d0ba	232	mbedtls_sha1_init( &sha1 );
marcozecchini	0:9fca2b23d0ba	233
marcozecchini	0:9fca2b23d0ba	234	/*
marcozecchini	0:9fca2b23d0ba	235	* SSLv3:
marcozecchini	0:9fca2b23d0ba	236	* block =
marcozecchini	0:9fca2b23d0ba	237	* MD5( secret + SHA1( 'A' + secret + random ) ) +
marcozecchini	0:9fca2b23d0ba	238	* MD5( secret + SHA1( 'BB' + secret + random ) ) +
marcozecchini	0:9fca2b23d0ba	239	* MD5( secret + SHA1( 'CCC' + secret + random ) ) +
marcozecchini	0:9fca2b23d0ba	240	* ...
marcozecchini	0:9fca2b23d0ba	241	*/
marcozecchini	0:9fca2b23d0ba	242	for( i = 0; i < dlen / 16; i++ )
marcozecchini	0:9fca2b23d0ba	243	{
marcozecchini	0:9fca2b23d0ba	244	memset( padding, (unsigned char) ('A' + i), 1 + i );
marcozecchini	0:9fca2b23d0ba	245
marcozecchini	0:9fca2b23d0ba	246	mbedtls_sha1_starts( &sha1 );
marcozecchini	0:9fca2b23d0ba	247	mbedtls_sha1_update( &sha1, padding, 1 + i );
marcozecchini	0:9fca2b23d0ba	248	mbedtls_sha1_update( &sha1, secret, slen );
marcozecchini	0:9fca2b23d0ba	249	mbedtls_sha1_update( &sha1, random, rlen );
marcozecchini	0:9fca2b23d0ba	250	mbedtls_sha1_finish( &sha1, sha1sum );
marcozecchini	0:9fca2b23d0ba	251
marcozecchini	0:9fca2b23d0ba	252	mbedtls_md5_starts( &md5 );
marcozecchini	0:9fca2b23d0ba	253	mbedtls_md5_update( &md5, secret, slen );
marcozecchini	0:9fca2b23d0ba	254	mbedtls_md5_update( &md5, sha1sum, 20 );
marcozecchini	0:9fca2b23d0ba	255	mbedtls_md5_finish( &md5, dstbuf + i * 16 );
marcozecchini	0:9fca2b23d0ba	256	}
marcozecchini	0:9fca2b23d0ba	257
marcozecchini	0:9fca2b23d0ba	258	mbedtls_md5_free( &md5 );
marcozecchini	0:9fca2b23d0ba	259	mbedtls_sha1_free( &sha1 );
marcozecchini	0:9fca2b23d0ba	260
marcozecchini	0:9fca2b23d0ba	261	mbedtls_zeroize( padding, sizeof( padding ) );
marcozecchini	0:9fca2b23d0ba	262	mbedtls_zeroize( sha1sum, sizeof( sha1sum ) );
marcozecchini	0:9fca2b23d0ba	263
marcozecchini	0:9fca2b23d0ba	264	return( 0 );
marcozecchini	0:9fca2b23d0ba	265	}
marcozecchini	0:9fca2b23d0ba	266	#endif /* MBEDTLS_SSL_PROTO_SSL3 */
marcozecchini	0:9fca2b23d0ba	267
marcozecchini	0:9fca2b23d0ba	268	#if defined(MBEDTLS_SSL_PROTO_TLS1) \|\| defined(MBEDTLS_SSL_PROTO_TLS1_1)
marcozecchini	0:9fca2b23d0ba	269	static int tls1_prf( const unsigned char *secret, size_t slen,
marcozecchini	0:9fca2b23d0ba	270	const char *label,
marcozecchini	0:9fca2b23d0ba	271	const unsigned char *random, size_t rlen,
marcozecchini	0:9fca2b23d0ba	272	unsigned char *dstbuf, size_t dlen )
marcozecchini	0:9fca2b23d0ba	273	{
marcozecchini	0:9fca2b23d0ba	274	size_t nb, hs;
marcozecchini	0:9fca2b23d0ba	275	size_t i, j, k;
marcozecchini	0:9fca2b23d0ba	276	const unsigned char S1, S2;
marcozecchini	0:9fca2b23d0ba	277	unsigned char tmp[128];
marcozecchini	0:9fca2b23d0ba	278	unsigned char h_i[20];
marcozecchini	0:9fca2b23d0ba	279	const mbedtls_md_info_t *md_info;
marcozecchini	0:9fca2b23d0ba	280	mbedtls_md_context_t md_ctx;
marcozecchini	0:9fca2b23d0ba	281	int ret;
marcozecchini	0:9fca2b23d0ba	282
marcozecchini	0:9fca2b23d0ba	283	mbedtls_md_init( &md_ctx );
marcozecchini	0:9fca2b23d0ba	284
marcozecchini	0:9fca2b23d0ba	285	if( sizeof( tmp ) < 20 + strlen( label ) + rlen )
marcozecchini	0:9fca2b23d0ba	286	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
marcozecchini	0:9fca2b23d0ba	287
marcozecchini	0:9fca2b23d0ba	288	hs = ( slen + 1 ) / 2;
marcozecchini	0:9fca2b23d0ba	289	S1 = secret;
marcozecchini	0:9fca2b23d0ba	290	S2 = secret + slen - hs;
marcozecchini	0:9fca2b23d0ba	291
marcozecchini	0:9fca2b23d0ba	292	nb = strlen( label );
marcozecchini	0:9fca2b23d0ba	293	memcpy( tmp + 20, label, nb );
marcozecchini	0:9fca2b23d0ba	294	memcpy( tmp + 20 + nb, random, rlen );
marcozecchini	0:9fca2b23d0ba	295	nb += rlen;
marcozecchini	0:9fca2b23d0ba	296
marcozecchini	0:9fca2b23d0ba	297	/*
marcozecchini	0:9fca2b23d0ba	298	* First compute P_md5(secret,label+random)[0..dlen]
marcozecchini	0:9fca2b23d0ba	299	*/
marcozecchini	0:9fca2b23d0ba	300	if( ( md_info = mbedtls_md_info_from_type( MBEDTLS_MD_MD5 ) ) == NULL )
marcozecchini	0:9fca2b23d0ba	301	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
marcozecchini	0:9fca2b23d0ba	302
marcozecchini	0:9fca2b23d0ba	303	if( ( ret = mbedtls_md_setup( &md_ctx, md_info, 1 ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	304	return( ret );
marcozecchini	0:9fca2b23d0ba	305
marcozecchini	0:9fca2b23d0ba	306	mbedtls_md_hmac_starts( &md_ctx, S1, hs );
marcozecchini	0:9fca2b23d0ba	307	mbedtls_md_hmac_update( &md_ctx, tmp + 20, nb );
marcozecchini	0:9fca2b23d0ba	308	mbedtls_md_hmac_finish( &md_ctx, 4 + tmp );
marcozecchini	0:9fca2b23d0ba	309
marcozecchini	0:9fca2b23d0ba	310	for( i = 0; i < dlen; i += 16 )
marcozecchini	0:9fca2b23d0ba	311	{
marcozecchini	0:9fca2b23d0ba	312	mbedtls_md_hmac_reset ( &md_ctx );
marcozecchini	0:9fca2b23d0ba	313	mbedtls_md_hmac_update( &md_ctx, 4 + tmp, 16 + nb );
marcozecchini	0:9fca2b23d0ba	314	mbedtls_md_hmac_finish( &md_ctx, h_i );
marcozecchini	0:9fca2b23d0ba	315
marcozecchini	0:9fca2b23d0ba	316	mbedtls_md_hmac_reset ( &md_ctx );
marcozecchini	0:9fca2b23d0ba	317	mbedtls_md_hmac_update( &md_ctx, 4 + tmp, 16 );
marcozecchini	0:9fca2b23d0ba	318	mbedtls_md_hmac_finish( &md_ctx, 4 + tmp );
marcozecchini	0:9fca2b23d0ba	319
marcozecchini	0:9fca2b23d0ba	320	k = ( i + 16 > dlen ) ? dlen % 16 : 16;
marcozecchini	0:9fca2b23d0ba	321
marcozecchini	0:9fca2b23d0ba	322	for( j = 0; j < k; j++ )
marcozecchini	0:9fca2b23d0ba	323	dstbuf[i + j] = h_i[j];
marcozecchini	0:9fca2b23d0ba	324	}
marcozecchini	0:9fca2b23d0ba	325
marcozecchini	0:9fca2b23d0ba	326	mbedtls_md_free( &md_ctx );
marcozecchini	0:9fca2b23d0ba	327
marcozecchini	0:9fca2b23d0ba	328	/*
marcozecchini	0:9fca2b23d0ba	329	* XOR out with P_sha1(secret,label+random)[0..dlen]
marcozecchini	0:9fca2b23d0ba	330	*/
marcozecchini	0:9fca2b23d0ba	331	if( ( md_info = mbedtls_md_info_from_type( MBEDTLS_MD_SHA1 ) ) == NULL )
marcozecchini	0:9fca2b23d0ba	332	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
marcozecchini	0:9fca2b23d0ba	333
marcozecchini	0:9fca2b23d0ba	334	if( ( ret = mbedtls_md_setup( &md_ctx, md_info, 1 ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	335	return( ret );
marcozecchini	0:9fca2b23d0ba	336
marcozecchini	0:9fca2b23d0ba	337	mbedtls_md_hmac_starts( &md_ctx, S2, hs );
marcozecchini	0:9fca2b23d0ba	338	mbedtls_md_hmac_update( &md_ctx, tmp + 20, nb );
marcozecchini	0:9fca2b23d0ba	339	mbedtls_md_hmac_finish( &md_ctx, tmp );
marcozecchini	0:9fca2b23d0ba	340
marcozecchini	0:9fca2b23d0ba	341	for( i = 0; i < dlen; i += 20 )
marcozecchini	0:9fca2b23d0ba	342	{
marcozecchini	0:9fca2b23d0ba	343	mbedtls_md_hmac_reset ( &md_ctx );
marcozecchini	0:9fca2b23d0ba	344	mbedtls_md_hmac_update( &md_ctx, tmp, 20 + nb );
marcozecchini	0:9fca2b23d0ba	345	mbedtls_md_hmac_finish( &md_ctx, h_i );
marcozecchini	0:9fca2b23d0ba	346
marcozecchini	0:9fca2b23d0ba	347	mbedtls_md_hmac_reset ( &md_ctx );
marcozecchini	0:9fca2b23d0ba	348	mbedtls_md_hmac_update( &md_ctx, tmp, 20 );
marcozecchini	0:9fca2b23d0ba	349	mbedtls_md_hmac_finish( &md_ctx, tmp );
marcozecchini	0:9fca2b23d0ba	350
marcozecchini	0:9fca2b23d0ba	351	k = ( i + 20 > dlen ) ? dlen % 20 : 20;
marcozecchini	0:9fca2b23d0ba	352
marcozecchini	0:9fca2b23d0ba	353	for( j = 0; j < k; j++ )
marcozecchini	0:9fca2b23d0ba	354	dstbuf[i + j] = (unsigned char)( dstbuf[i + j] ^ h_i[j] );
marcozecchini	0:9fca2b23d0ba	355	}
marcozecchini	0:9fca2b23d0ba	356
marcozecchini	0:9fca2b23d0ba	357	mbedtls_md_free( &md_ctx );
marcozecchini	0:9fca2b23d0ba	358
marcozecchini	0:9fca2b23d0ba	359	mbedtls_zeroize( tmp, sizeof( tmp ) );
marcozecchini	0:9fca2b23d0ba	360	mbedtls_zeroize( h_i, sizeof( h_i ) );
marcozecchini	0:9fca2b23d0ba	361
marcozecchini	0:9fca2b23d0ba	362	return( 0 );
marcozecchini	0:9fca2b23d0ba	363	}
marcozecchini	0:9fca2b23d0ba	364	#endif /* MBEDTLS_SSL_PROTO_TLS1) \|\| MBEDTLS_SSL_PROTO_TLS1_1 */
marcozecchini	0:9fca2b23d0ba	365
marcozecchini	0:9fca2b23d0ba	366	#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
marcozecchini	0:9fca2b23d0ba	367	static int tls_prf_generic( mbedtls_md_type_t md_type,
marcozecchini	0:9fca2b23d0ba	368	const unsigned char *secret, size_t slen,
marcozecchini	0:9fca2b23d0ba	369	const char *label,
marcozecchini	0:9fca2b23d0ba	370	const unsigned char *random, size_t rlen,
marcozecchini	0:9fca2b23d0ba	371	unsigned char *dstbuf, size_t dlen )
marcozecchini	0:9fca2b23d0ba	372	{
marcozecchini	0:9fca2b23d0ba	373	size_t nb;
marcozecchini	0:9fca2b23d0ba	374	size_t i, j, k, md_len;
marcozecchini	0:9fca2b23d0ba	375	unsigned char tmp[128];
marcozecchini	0:9fca2b23d0ba	376	unsigned char h_i[MBEDTLS_MD_MAX_SIZE];
marcozecchini	0:9fca2b23d0ba	377	const mbedtls_md_info_t *md_info;
marcozecchini	0:9fca2b23d0ba	378	mbedtls_md_context_t md_ctx;
marcozecchini	0:9fca2b23d0ba	379	int ret;
marcozecchini	0:9fca2b23d0ba	380
marcozecchini	0:9fca2b23d0ba	381	mbedtls_md_init( &md_ctx );
marcozecchini	0:9fca2b23d0ba	382
marcozecchini	0:9fca2b23d0ba	383	if( ( md_info = mbedtls_md_info_from_type( md_type ) ) == NULL )
marcozecchini	0:9fca2b23d0ba	384	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
marcozecchini	0:9fca2b23d0ba	385
marcozecchini	0:9fca2b23d0ba	386	md_len = mbedtls_md_get_size( md_info );
marcozecchini	0:9fca2b23d0ba	387
marcozecchini	0:9fca2b23d0ba	388	if( sizeof( tmp ) < md_len + strlen( label ) + rlen )
marcozecchini	0:9fca2b23d0ba	389	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
marcozecchini	0:9fca2b23d0ba	390
marcozecchini	0:9fca2b23d0ba	391	nb = strlen( label );
marcozecchini	0:9fca2b23d0ba	392	memcpy( tmp + md_len, label, nb );
marcozecchini	0:9fca2b23d0ba	393	memcpy( tmp + md_len + nb, random, rlen );
marcozecchini	0:9fca2b23d0ba	394	nb += rlen;
marcozecchini	0:9fca2b23d0ba	395
marcozecchini	0:9fca2b23d0ba	396	/*
marcozecchini	0:9fca2b23d0ba	397	* Compute P_<hash>(secret, label + random)[0..dlen]
marcozecchini	0:9fca2b23d0ba	398	*/
marcozecchini	0:9fca2b23d0ba	399	if ( ( ret = mbedtls_md_setup( &md_ctx, md_info, 1 ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	400	return( ret );
marcozecchini	0:9fca2b23d0ba	401
marcozecchini	0:9fca2b23d0ba	402	mbedtls_md_hmac_starts( &md_ctx, secret, slen );
marcozecchini	0:9fca2b23d0ba	403	mbedtls_md_hmac_update( &md_ctx, tmp + md_len, nb );
marcozecchini	0:9fca2b23d0ba	404	mbedtls_md_hmac_finish( &md_ctx, tmp );
marcozecchini	0:9fca2b23d0ba	405
marcozecchini	0:9fca2b23d0ba	406	for( i = 0; i < dlen; i += md_len )
marcozecchini	0:9fca2b23d0ba	407	{
marcozecchini	0:9fca2b23d0ba	408	mbedtls_md_hmac_reset ( &md_ctx );
marcozecchini	0:9fca2b23d0ba	409	mbedtls_md_hmac_update( &md_ctx, tmp, md_len + nb );
marcozecchini	0:9fca2b23d0ba	410	mbedtls_md_hmac_finish( &md_ctx, h_i );
marcozecchini	0:9fca2b23d0ba	411
marcozecchini	0:9fca2b23d0ba	412	mbedtls_md_hmac_reset ( &md_ctx );
marcozecchini	0:9fca2b23d0ba	413	mbedtls_md_hmac_update( &md_ctx, tmp, md_len );
marcozecchini	0:9fca2b23d0ba	414	mbedtls_md_hmac_finish( &md_ctx, tmp );
marcozecchini	0:9fca2b23d0ba	415
marcozecchini	0:9fca2b23d0ba	416	k = ( i + md_len > dlen ) ? dlen % md_len : md_len;
marcozecchini	0:9fca2b23d0ba	417
marcozecchini	0:9fca2b23d0ba	418	for( j = 0; j < k; j++ )
marcozecchini	0:9fca2b23d0ba	419	dstbuf[i + j] = h_i[j];
marcozecchini	0:9fca2b23d0ba	420	}
marcozecchini	0:9fca2b23d0ba	421
marcozecchini	0:9fca2b23d0ba	422	mbedtls_md_free( &md_ctx );
marcozecchini	0:9fca2b23d0ba	423
marcozecchini	0:9fca2b23d0ba	424	mbedtls_zeroize( tmp, sizeof( tmp ) );
marcozecchini	0:9fca2b23d0ba	425	mbedtls_zeroize( h_i, sizeof( h_i ) );
marcozecchini	0:9fca2b23d0ba	426
marcozecchini	0:9fca2b23d0ba	427	return( 0 );
marcozecchini	0:9fca2b23d0ba	428	}
marcozecchini	0:9fca2b23d0ba	429
marcozecchini	0:9fca2b23d0ba	430	#if defined(MBEDTLS_SHA256_C)
marcozecchini	0:9fca2b23d0ba	431	static int tls_prf_sha256( const unsigned char *secret, size_t slen,
marcozecchini	0:9fca2b23d0ba	432	const char *label,
marcozecchini	0:9fca2b23d0ba	433	const unsigned char *random, size_t rlen,
marcozecchini	0:9fca2b23d0ba	434	unsigned char *dstbuf, size_t dlen )
marcozecchini	0:9fca2b23d0ba	435	{
marcozecchini	0:9fca2b23d0ba	436	return( tls_prf_generic( MBEDTLS_MD_SHA256, secret, slen,
marcozecchini	0:9fca2b23d0ba	437	label, random, rlen, dstbuf, dlen ) );
marcozecchini	0:9fca2b23d0ba	438	}
marcozecchini	0:9fca2b23d0ba	439	#endif /* MBEDTLS_SHA256_C */
marcozecchini	0:9fca2b23d0ba	440
marcozecchini	0:9fca2b23d0ba	441	#if defined(MBEDTLS_SHA512_C)
marcozecchini	0:9fca2b23d0ba	442	static int tls_prf_sha384( const unsigned char *secret, size_t slen,
marcozecchini	0:9fca2b23d0ba	443	const char *label,
marcozecchini	0:9fca2b23d0ba	444	const unsigned char *random, size_t rlen,
marcozecchini	0:9fca2b23d0ba	445	unsigned char *dstbuf, size_t dlen )
marcozecchini	0:9fca2b23d0ba	446	{
marcozecchini	0:9fca2b23d0ba	447	return( tls_prf_generic( MBEDTLS_MD_SHA384, secret, slen,
marcozecchini	0:9fca2b23d0ba	448	label, random, rlen, dstbuf, dlen ) );
marcozecchini	0:9fca2b23d0ba	449	}
marcozecchini	0:9fca2b23d0ba	450	#endif /* MBEDTLS_SHA512_C */
marcozecchini	0:9fca2b23d0ba	451	#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
marcozecchini	0:9fca2b23d0ba	452
marcozecchini	0:9fca2b23d0ba	453	static void ssl_update_checksum_start( mbedtls_ssl_context , const unsigned char , size_t );
marcozecchini	0:9fca2b23d0ba	454
marcozecchini	0:9fca2b23d0ba	455	#if defined(MBEDTLS_SSL_PROTO_SSL3) \|\| defined(MBEDTLS_SSL_PROTO_TLS1) \|\| \
marcozecchini	0:9fca2b23d0ba	456	defined(MBEDTLS_SSL_PROTO_TLS1_1)
marcozecchini	0:9fca2b23d0ba	457	static void ssl_update_checksum_md5sha1( mbedtls_ssl_context , const unsigned char , size_t );
marcozecchini	0:9fca2b23d0ba	458	#endif
marcozecchini	0:9fca2b23d0ba	459
marcozecchini	0:9fca2b23d0ba	460	#if defined(MBEDTLS_SSL_PROTO_SSL3)
marcozecchini	0:9fca2b23d0ba	461	static void ssl_calc_verify_ssl( mbedtls_ssl_context , unsigned char );
marcozecchini	0:9fca2b23d0ba	462	static void ssl_calc_finished_ssl( mbedtls_ssl_context , unsigned char , int );
marcozecchini	0:9fca2b23d0ba	463	#endif
marcozecchini	0:9fca2b23d0ba	464
marcozecchini	0:9fca2b23d0ba	465	#if defined(MBEDTLS_SSL_PROTO_TLS1) \|\| defined(MBEDTLS_SSL_PROTO_TLS1_1)
marcozecchini	0:9fca2b23d0ba	466	static void ssl_calc_verify_tls( mbedtls_ssl_context , unsigned char );
marcozecchini	0:9fca2b23d0ba	467	static void ssl_calc_finished_tls( mbedtls_ssl_context , unsigned char , int );
marcozecchini	0:9fca2b23d0ba	468	#endif
marcozecchini	0:9fca2b23d0ba	469
marcozecchini	0:9fca2b23d0ba	470	#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
marcozecchini	0:9fca2b23d0ba	471	#if defined(MBEDTLS_SHA256_C)
marcozecchini	0:9fca2b23d0ba	472	static void ssl_update_checksum_sha256( mbedtls_ssl_context , const unsigned char , size_t );
marcozecchini	0:9fca2b23d0ba	473	static void ssl_calc_verify_tls_sha256( mbedtls_ssl_context ,unsigned char );
marcozecchini	0:9fca2b23d0ba	474	static void ssl_calc_finished_tls_sha256( mbedtls_ssl_context ,unsigned char , int );
marcozecchini	0:9fca2b23d0ba	475	#endif
marcozecchini	0:9fca2b23d0ba	476
marcozecchini	0:9fca2b23d0ba	477	#if defined(MBEDTLS_SHA512_C)
marcozecchini	0:9fca2b23d0ba	478	static void ssl_update_checksum_sha384( mbedtls_ssl_context , const unsigned char , size_t );
marcozecchini	0:9fca2b23d0ba	479	static void ssl_calc_verify_tls_sha384( mbedtls_ssl_context , unsigned char );
marcozecchini	0:9fca2b23d0ba	480	static void ssl_calc_finished_tls_sha384( mbedtls_ssl_context , unsigned char , int );
marcozecchini	0:9fca2b23d0ba	481	#endif
marcozecchini	0:9fca2b23d0ba	482	#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
marcozecchini	0:9fca2b23d0ba	483
marcozecchini	0:9fca2b23d0ba	484	int mbedtls_ssl_derive_keys( mbedtls_ssl_context *ssl )
marcozecchini	0:9fca2b23d0ba	485	{
marcozecchini	0:9fca2b23d0ba	486	int ret = 0;
marcozecchini	0:9fca2b23d0ba	487	unsigned char tmp[64];
marcozecchini	0:9fca2b23d0ba	488	unsigned char keyblk[256];
marcozecchini	0:9fca2b23d0ba	489	unsigned char *key1;
marcozecchini	0:9fca2b23d0ba	490	unsigned char *key2;
marcozecchini	0:9fca2b23d0ba	491	unsigned char *mac_enc;
marcozecchini	0:9fca2b23d0ba	492	unsigned char *mac_dec;
marcozecchini	0:9fca2b23d0ba	493	size_t iv_copy_len;
marcozecchini	0:9fca2b23d0ba	494	const mbedtls_cipher_info_t *cipher_info;
marcozecchini	0:9fca2b23d0ba	495	const mbedtls_md_info_t *md_info;
marcozecchini	0:9fca2b23d0ba	496
marcozecchini	0:9fca2b23d0ba	497	mbedtls_ssl_session *session = ssl->session_negotiate;
marcozecchini	0:9fca2b23d0ba	498	mbedtls_ssl_transform *transform = ssl->transform_negotiate;
marcozecchini	0:9fca2b23d0ba	499	mbedtls_ssl_handshake_params *handshake = ssl->handshake;
marcozecchini	0:9fca2b23d0ba	500
marcozecchini	0:9fca2b23d0ba	501	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> derive keys" ) );
marcozecchini	0:9fca2b23d0ba	502
marcozecchini	0:9fca2b23d0ba	503	cipher_info = mbedtls_cipher_info_from_type( transform->ciphersuite_info->cipher );
marcozecchini	0:9fca2b23d0ba	504	if( cipher_info == NULL )
marcozecchini	0:9fca2b23d0ba	505	{
marcozecchini	0:9fca2b23d0ba	506	MBEDTLS_SSL_DEBUG_MSG( 1, ( "cipher info for %d not found",
marcozecchini	0:9fca2b23d0ba	507	transform->ciphersuite_info->cipher ) );
marcozecchini	0:9fca2b23d0ba	508	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
marcozecchini	0:9fca2b23d0ba	509	}
marcozecchini	0:9fca2b23d0ba	510
marcozecchini	0:9fca2b23d0ba	511	md_info = mbedtls_md_info_from_type( transform->ciphersuite_info->mac );
marcozecchini	0:9fca2b23d0ba	512	if( md_info == NULL )
marcozecchini	0:9fca2b23d0ba	513	{
marcozecchini	0:9fca2b23d0ba	514	MBEDTLS_SSL_DEBUG_MSG( 1, ( "mbedtls_md info for %d not found",
marcozecchini	0:9fca2b23d0ba	515	transform->ciphersuite_info->mac ) );
marcozecchini	0:9fca2b23d0ba	516	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
marcozecchini	0:9fca2b23d0ba	517	}
marcozecchini	0:9fca2b23d0ba	518
marcozecchini	0:9fca2b23d0ba	519	/*
marcozecchini	0:9fca2b23d0ba	520	* Set appropriate PRF function and other SSL / TLS / TLS1.2 functions
marcozecchini	0:9fca2b23d0ba	521	*/
marcozecchini	0:9fca2b23d0ba	522	#if defined(MBEDTLS_SSL_PROTO_SSL3)
marcozecchini	0:9fca2b23d0ba	523	if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 )
marcozecchini	0:9fca2b23d0ba	524	{
marcozecchini	0:9fca2b23d0ba	525	handshake->tls_prf = ssl3_prf;
marcozecchini	0:9fca2b23d0ba	526	handshake->calc_verify = ssl_calc_verify_ssl;
marcozecchini	0:9fca2b23d0ba	527	handshake->calc_finished = ssl_calc_finished_ssl;
marcozecchini	0:9fca2b23d0ba	528	}
marcozecchini	0:9fca2b23d0ba	529	else
marcozecchini	0:9fca2b23d0ba	530	#endif
marcozecchini	0:9fca2b23d0ba	531	#if defined(MBEDTLS_SSL_PROTO_TLS1) \|\| defined(MBEDTLS_SSL_PROTO_TLS1_1)
marcozecchini	0:9fca2b23d0ba	532	if( ssl->minor_ver < MBEDTLS_SSL_MINOR_VERSION_3 )
marcozecchini	0:9fca2b23d0ba	533	{
marcozecchini	0:9fca2b23d0ba	534	handshake->tls_prf = tls1_prf;
marcozecchini	0:9fca2b23d0ba	535	handshake->calc_verify = ssl_calc_verify_tls;
marcozecchini	0:9fca2b23d0ba	536	handshake->calc_finished = ssl_calc_finished_tls;
marcozecchini	0:9fca2b23d0ba	537	}
marcozecchini	0:9fca2b23d0ba	538	else
marcozecchini	0:9fca2b23d0ba	539	#endif
marcozecchini	0:9fca2b23d0ba	540	#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
marcozecchini	0:9fca2b23d0ba	541	#if defined(MBEDTLS_SHA512_C)
marcozecchini	0:9fca2b23d0ba	542	if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_3 &&
marcozecchini	0:9fca2b23d0ba	543	transform->ciphersuite_info->mac == MBEDTLS_MD_SHA384 )
marcozecchini	0:9fca2b23d0ba	544	{
marcozecchini	0:9fca2b23d0ba	545	handshake->tls_prf = tls_prf_sha384;
marcozecchini	0:9fca2b23d0ba	546	handshake->calc_verify = ssl_calc_verify_tls_sha384;
marcozecchini	0:9fca2b23d0ba	547	handshake->calc_finished = ssl_calc_finished_tls_sha384;
marcozecchini	0:9fca2b23d0ba	548	}
marcozecchini	0:9fca2b23d0ba	549	else
marcozecchini	0:9fca2b23d0ba	550	#endif
marcozecchini	0:9fca2b23d0ba	551	#if defined(MBEDTLS_SHA256_C)
marcozecchini	0:9fca2b23d0ba	552	if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_3 )
marcozecchini	0:9fca2b23d0ba	553	{
marcozecchini	0:9fca2b23d0ba	554	handshake->tls_prf = tls_prf_sha256;
marcozecchini	0:9fca2b23d0ba	555	handshake->calc_verify = ssl_calc_verify_tls_sha256;
marcozecchini	0:9fca2b23d0ba	556	handshake->calc_finished = ssl_calc_finished_tls_sha256;
marcozecchini	0:9fca2b23d0ba	557	}
marcozecchini	0:9fca2b23d0ba	558	else
marcozecchini	0:9fca2b23d0ba	559	#endif
marcozecchini	0:9fca2b23d0ba	560	#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
marcozecchini	0:9fca2b23d0ba	561	{
marcozecchini	0:9fca2b23d0ba	562	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
marcozecchini	0:9fca2b23d0ba	563	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
marcozecchini	0:9fca2b23d0ba	564	}
marcozecchini	0:9fca2b23d0ba	565
marcozecchini	0:9fca2b23d0ba	566	/*
marcozecchini	0:9fca2b23d0ba	567	* SSLv3:
marcozecchini	0:9fca2b23d0ba	568	* master =
marcozecchini	0:9fca2b23d0ba	569	* MD5( premaster + SHA1( 'A' + premaster + randbytes ) ) +
marcozecchini	0:9fca2b23d0ba	570	* MD5( premaster + SHA1( 'BB' + premaster + randbytes ) ) +
marcozecchini	0:9fca2b23d0ba	571	* MD5( premaster + SHA1( 'CCC' + premaster + randbytes ) )
marcozecchini	0:9fca2b23d0ba	572	*
marcozecchini	0:9fca2b23d0ba	573	* TLSv1+:
marcozecchini	0:9fca2b23d0ba	574	* master = PRF( premaster, "master secret", randbytes )[0..47]
marcozecchini	0:9fca2b23d0ba	575	*/
marcozecchini	0:9fca2b23d0ba	576	if( handshake->resume == 0 )
marcozecchini	0:9fca2b23d0ba	577	{
marcozecchini	0:9fca2b23d0ba	578	MBEDTLS_SSL_DEBUG_BUF( 3, "premaster secret", handshake->premaster,
marcozecchini	0:9fca2b23d0ba	579	handshake->pmslen );
marcozecchini	0:9fca2b23d0ba	580
marcozecchini	0:9fca2b23d0ba	581	#if defined(MBEDTLS_SSL_EXTENDED_MASTER_SECRET)
marcozecchini	0:9fca2b23d0ba	582	if( ssl->handshake->extended_ms == MBEDTLS_SSL_EXTENDED_MS_ENABLED )
marcozecchini	0:9fca2b23d0ba	583	{
marcozecchini	0:9fca2b23d0ba	584	unsigned char session_hash[48];
marcozecchini	0:9fca2b23d0ba	585	size_t hash_len;
marcozecchini	0:9fca2b23d0ba	586
marcozecchini	0:9fca2b23d0ba	587	MBEDTLS_SSL_DEBUG_MSG( 3, ( "using extended master secret" ) );
marcozecchini	0:9fca2b23d0ba	588
marcozecchini	0:9fca2b23d0ba	589	ssl->handshake->calc_verify( ssl, session_hash );
marcozecchini	0:9fca2b23d0ba	590
marcozecchini	0:9fca2b23d0ba	591	#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
marcozecchini	0:9fca2b23d0ba	592	if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_3 )
marcozecchini	0:9fca2b23d0ba	593	{
marcozecchini	0:9fca2b23d0ba	594	#if defined(MBEDTLS_SHA512_C)
marcozecchini	0:9fca2b23d0ba	595	if( ssl->transform_negotiate->ciphersuite_info->mac ==
marcozecchini	0:9fca2b23d0ba	596	MBEDTLS_MD_SHA384 )
marcozecchini	0:9fca2b23d0ba	597	{
marcozecchini	0:9fca2b23d0ba	598	hash_len = 48;
marcozecchini	0:9fca2b23d0ba	599	}
marcozecchini	0:9fca2b23d0ba	600	else
marcozecchini	0:9fca2b23d0ba	601	#endif
marcozecchini	0:9fca2b23d0ba	602	hash_len = 32;
marcozecchini	0:9fca2b23d0ba	603	}
marcozecchini	0:9fca2b23d0ba	604	else
marcozecchini	0:9fca2b23d0ba	605	#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
marcozecchini	0:9fca2b23d0ba	606	hash_len = 36;
marcozecchini	0:9fca2b23d0ba	607
marcozecchini	0:9fca2b23d0ba	608	MBEDTLS_SSL_DEBUG_BUF( 3, "session hash", session_hash, hash_len );
marcozecchini	0:9fca2b23d0ba	609
marcozecchini	0:9fca2b23d0ba	610	ret = handshake->tls_prf( handshake->premaster, handshake->pmslen,
marcozecchini	0:9fca2b23d0ba	611	"extended master secret",
marcozecchini	0:9fca2b23d0ba	612	session_hash, hash_len,
marcozecchini	0:9fca2b23d0ba	613	session->master, 48 );
marcozecchini	0:9fca2b23d0ba	614	if( ret != 0 )
marcozecchini	0:9fca2b23d0ba	615	{
marcozecchini	0:9fca2b23d0ba	616	MBEDTLS_SSL_DEBUG_RET( 1, "prf", ret );
marcozecchini	0:9fca2b23d0ba	617	return( ret );
marcozecchini	0:9fca2b23d0ba	618	}
marcozecchini	0:9fca2b23d0ba	619
marcozecchini	0:9fca2b23d0ba	620	}
marcozecchini	0:9fca2b23d0ba	621	else
marcozecchini	0:9fca2b23d0ba	622	#endif
marcozecchini	0:9fca2b23d0ba	623	ret = handshake->tls_prf( handshake->premaster, handshake->pmslen,
marcozecchini	0:9fca2b23d0ba	624	"master secret",
marcozecchini	0:9fca2b23d0ba	625	handshake->randbytes, 64,
marcozecchini	0:9fca2b23d0ba	626	session->master, 48 );
marcozecchini	0:9fca2b23d0ba	627	if( ret != 0 )
marcozecchini	0:9fca2b23d0ba	628	{
marcozecchini	0:9fca2b23d0ba	629	MBEDTLS_SSL_DEBUG_RET( 1, "prf", ret );
marcozecchini	0:9fca2b23d0ba	630	return( ret );
marcozecchini	0:9fca2b23d0ba	631	}
marcozecchini	0:9fca2b23d0ba	632
marcozecchini	0:9fca2b23d0ba	633	mbedtls_zeroize( handshake->premaster, sizeof(handshake->premaster) );
marcozecchini	0:9fca2b23d0ba	634	}
marcozecchini	0:9fca2b23d0ba	635	else
marcozecchini	0:9fca2b23d0ba	636	MBEDTLS_SSL_DEBUG_MSG( 3, ( "no premaster (session resumed)" ) );
marcozecchini	0:9fca2b23d0ba	637
marcozecchini	0:9fca2b23d0ba	638	/*
marcozecchini	0:9fca2b23d0ba	639	* Swap the client and server random values.
marcozecchini	0:9fca2b23d0ba	640	*/
marcozecchini	0:9fca2b23d0ba	641	memcpy( tmp, handshake->randbytes, 64 );
marcozecchini	0:9fca2b23d0ba	642	memcpy( handshake->randbytes, tmp + 32, 32 );
marcozecchini	0:9fca2b23d0ba	643	memcpy( handshake->randbytes + 32, tmp, 32 );
marcozecchini	0:9fca2b23d0ba	644	mbedtls_zeroize( tmp, sizeof( tmp ) );
marcozecchini	0:9fca2b23d0ba	645
marcozecchini	0:9fca2b23d0ba	646	/*
marcozecchini	0:9fca2b23d0ba	647	* SSLv3:
marcozecchini	0:9fca2b23d0ba	648	* key block =
marcozecchini	0:9fca2b23d0ba	649	* MD5( master + SHA1( 'A' + master + randbytes ) ) +
marcozecchini	0:9fca2b23d0ba	650	* MD5( master + SHA1( 'BB' + master + randbytes ) ) +
marcozecchini	0:9fca2b23d0ba	651	* MD5( master + SHA1( 'CCC' + master + randbytes ) ) +
marcozecchini	0:9fca2b23d0ba	652	* MD5( master + SHA1( 'DDDD' + master + randbytes ) ) +
marcozecchini	0:9fca2b23d0ba	653	* ...
marcozecchini	0:9fca2b23d0ba	654	*
marcozecchini	0:9fca2b23d0ba	655	* TLSv1:
marcozecchini	0:9fca2b23d0ba	656	* key block = PRF( master, "key expansion", randbytes )
marcozecchini	0:9fca2b23d0ba	657	*/
marcozecchini	0:9fca2b23d0ba	658	ret = handshake->tls_prf( session->master, 48, "key expansion",
marcozecchini	0:9fca2b23d0ba	659	handshake->randbytes, 64, keyblk, 256 );
marcozecchini	0:9fca2b23d0ba	660	if( ret != 0 )
marcozecchini	0:9fca2b23d0ba	661	{
marcozecchini	0:9fca2b23d0ba	662	MBEDTLS_SSL_DEBUG_RET( 1, "prf", ret );
marcozecchini	0:9fca2b23d0ba	663	return( ret );
marcozecchini	0:9fca2b23d0ba	664	}
marcozecchini	0:9fca2b23d0ba	665
marcozecchini	0:9fca2b23d0ba	666	MBEDTLS_SSL_DEBUG_MSG( 3, ( "ciphersuite = %s",
marcozecchini	0:9fca2b23d0ba	667	mbedtls_ssl_get_ciphersuite_name( session->ciphersuite ) ) );
marcozecchini	0:9fca2b23d0ba	668	MBEDTLS_SSL_DEBUG_BUF( 3, "master secret", session->master, 48 );
marcozecchini	0:9fca2b23d0ba	669	MBEDTLS_SSL_DEBUG_BUF( 4, "random bytes", handshake->randbytes, 64 );
marcozecchini	0:9fca2b23d0ba	670	MBEDTLS_SSL_DEBUG_BUF( 4, "key block", keyblk, 256 );
marcozecchini	0:9fca2b23d0ba	671
marcozecchini	0:9fca2b23d0ba	672	mbedtls_zeroize( handshake->randbytes, sizeof( handshake->randbytes ) );
marcozecchini	0:9fca2b23d0ba	673
marcozecchini	0:9fca2b23d0ba	674	/*
marcozecchini	0:9fca2b23d0ba	675	* Determine the appropriate key, IV and MAC length.
marcozecchini	0:9fca2b23d0ba	676	*/
marcozecchini	0:9fca2b23d0ba	677
marcozecchini	0:9fca2b23d0ba	678	transform->keylen = cipher_info->key_bitlen / 8;
marcozecchini	0:9fca2b23d0ba	679
marcozecchini	0:9fca2b23d0ba	680	if( cipher_info->mode == MBEDTLS_MODE_GCM \|\|
marcozecchini	0:9fca2b23d0ba	681	cipher_info->mode == MBEDTLS_MODE_CCM )
marcozecchini	0:9fca2b23d0ba	682	{
marcozecchini	0:9fca2b23d0ba	683	transform->maclen = 0;
marcozecchini	0:9fca2b23d0ba	684
marcozecchini	0:9fca2b23d0ba	685	transform->ivlen = 12;
marcozecchini	0:9fca2b23d0ba	686	transform->fixed_ivlen = 4;
marcozecchini	0:9fca2b23d0ba	687
marcozecchini	0:9fca2b23d0ba	688	/* Minimum length is expicit IV + tag */
marcozecchini	0:9fca2b23d0ba	689	transform->minlen = transform->ivlen - transform->fixed_ivlen
marcozecchini	0:9fca2b23d0ba	690	+ ( transform->ciphersuite_info->flags &
marcozecchini	0:9fca2b23d0ba	691	MBEDTLS_CIPHERSUITE_SHORT_TAG ? 8 : 16 );
marcozecchini	0:9fca2b23d0ba	692	}
marcozecchini	0:9fca2b23d0ba	693	else
marcozecchini	0:9fca2b23d0ba	694	{
marcozecchini	0:9fca2b23d0ba	695	/* Initialize HMAC contexts */
marcozecchini	0:9fca2b23d0ba	696	if( ( ret = mbedtls_md_setup( &transform->md_ctx_enc, md_info, 1 ) ) != 0 \|\|
marcozecchini	0:9fca2b23d0ba	697	( ret = mbedtls_md_setup( &transform->md_ctx_dec, md_info, 1 ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	698	{
marcozecchini	0:9fca2b23d0ba	699	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_md_setup", ret );
marcozecchini	0:9fca2b23d0ba	700	return( ret );
marcozecchini	0:9fca2b23d0ba	701	}
marcozecchini	0:9fca2b23d0ba	702
marcozecchini	0:9fca2b23d0ba	703	/* Get MAC length */
marcozecchini	0:9fca2b23d0ba	704	transform->maclen = mbedtls_md_get_size( md_info );
marcozecchini	0:9fca2b23d0ba	705
marcozecchini	0:9fca2b23d0ba	706	#if defined(MBEDTLS_SSL_TRUNCATED_HMAC)
marcozecchini	0:9fca2b23d0ba	707	/*
marcozecchini	0:9fca2b23d0ba	708	* If HMAC is to be truncated, we shall keep the leftmost bytes,
marcozecchini	0:9fca2b23d0ba	709	* (rfc 6066 page 13 or rfc 2104 section 4),
marcozecchini	0:9fca2b23d0ba	710	* so we only need to adjust the length here.
marcozecchini	0:9fca2b23d0ba	711	*/
marcozecchini	0:9fca2b23d0ba	712	if( session->trunc_hmac == MBEDTLS_SSL_TRUNC_HMAC_ENABLED )
marcozecchini	0:9fca2b23d0ba	713	transform->maclen = MBEDTLS_SSL_TRUNCATED_HMAC_LEN;
marcozecchini	0:9fca2b23d0ba	714	#endif /* MBEDTLS_SSL_TRUNCATED_HMAC */
marcozecchini	0:9fca2b23d0ba	715
marcozecchini	0:9fca2b23d0ba	716	/* IV length */
marcozecchini	0:9fca2b23d0ba	717	transform->ivlen = cipher_info->iv_size;
marcozecchini	0:9fca2b23d0ba	718
marcozecchini	0:9fca2b23d0ba	719	/* Minimum length */
marcozecchini	0:9fca2b23d0ba	720	if( cipher_info->mode == MBEDTLS_MODE_STREAM )
marcozecchini	0:9fca2b23d0ba	721	transform->minlen = transform->maclen;
marcozecchini	0:9fca2b23d0ba	722	else
marcozecchini	0:9fca2b23d0ba	723	{
marcozecchini	0:9fca2b23d0ba	724	/*
marcozecchini	0:9fca2b23d0ba	725	* GenericBlockCipher:
marcozecchini	0:9fca2b23d0ba	726	* 1. if EtM is in use: one block plus MAC
marcozecchini	0:9fca2b23d0ba	727	* otherwise: * first multiple of blocklen greater than maclen
marcozecchini	0:9fca2b23d0ba	728	* 2. IV except for SSL3 and TLS 1.0
marcozecchini	0:9fca2b23d0ba	729	*/
marcozecchini	0:9fca2b23d0ba	730	#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
marcozecchini	0:9fca2b23d0ba	731	if( session->encrypt_then_mac == MBEDTLS_SSL_ETM_ENABLED )
marcozecchini	0:9fca2b23d0ba	732	{
marcozecchini	0:9fca2b23d0ba	733	transform->minlen = transform->maclen
marcozecchini	0:9fca2b23d0ba	734	+ cipher_info->block_size;
marcozecchini	0:9fca2b23d0ba	735	}
marcozecchini	0:9fca2b23d0ba	736	else
marcozecchini	0:9fca2b23d0ba	737	#endif
marcozecchini	0:9fca2b23d0ba	738	{
marcozecchini	0:9fca2b23d0ba	739	transform->minlen = transform->maclen
marcozecchini	0:9fca2b23d0ba	740	+ cipher_info->block_size
marcozecchini	0:9fca2b23d0ba	741	- transform->maclen % cipher_info->block_size;
marcozecchini	0:9fca2b23d0ba	742	}
marcozecchini	0:9fca2b23d0ba	743
marcozecchini	0:9fca2b23d0ba	744	#if defined(MBEDTLS_SSL_PROTO_SSL3) \|\| defined(MBEDTLS_SSL_PROTO_TLS1)
marcozecchini	0:9fca2b23d0ba	745	if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 \|\|
marcozecchini	0:9fca2b23d0ba	746	ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_1 )
marcozecchini	0:9fca2b23d0ba	747	; /* No need to adjust minlen */
marcozecchini	0:9fca2b23d0ba	748	else
marcozecchini	0:9fca2b23d0ba	749	#endif
marcozecchini	0:9fca2b23d0ba	750	#if defined(MBEDTLS_SSL_PROTO_TLS1_1) \|\| defined(MBEDTLS_SSL_PROTO_TLS1_2)
marcozecchini	0:9fca2b23d0ba	751	if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_2 \|\|
marcozecchini	0:9fca2b23d0ba	752	ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_3 )
marcozecchini	0:9fca2b23d0ba	753	{
marcozecchini	0:9fca2b23d0ba	754	transform->minlen += transform->ivlen;
marcozecchini	0:9fca2b23d0ba	755	}
marcozecchini	0:9fca2b23d0ba	756	else
marcozecchini	0:9fca2b23d0ba	757	#endif
marcozecchini	0:9fca2b23d0ba	758	{
marcozecchini	0:9fca2b23d0ba	759	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
marcozecchini	0:9fca2b23d0ba	760	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
marcozecchini	0:9fca2b23d0ba	761	}
marcozecchini	0:9fca2b23d0ba	762	}
marcozecchini	0:9fca2b23d0ba	763	}
marcozecchini	0:9fca2b23d0ba	764
marcozecchini	0:9fca2b23d0ba	765	MBEDTLS_SSL_DEBUG_MSG( 3, ( "keylen: %d, minlen: %d, ivlen: %d, maclen: %d",
marcozecchini	0:9fca2b23d0ba	766	transform->keylen, transform->minlen, transform->ivlen,
marcozecchini	0:9fca2b23d0ba	767	transform->maclen ) );
marcozecchini	0:9fca2b23d0ba	768
marcozecchini	0:9fca2b23d0ba	769	/*
marcozecchini	0:9fca2b23d0ba	770	* Finally setup the cipher contexts, IVs and MAC secrets.
marcozecchini	0:9fca2b23d0ba	771	*/
marcozecchini	0:9fca2b23d0ba	772	#if defined(MBEDTLS_SSL_CLI_C)
marcozecchini	0:9fca2b23d0ba	773	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_CLIENT )
marcozecchini	0:9fca2b23d0ba	774	{
marcozecchini	0:9fca2b23d0ba	775	key1 = keyblk + transform->maclen * 2;
marcozecchini	0:9fca2b23d0ba	776	key2 = keyblk + transform->maclen * 2 + transform->keylen;
marcozecchini	0:9fca2b23d0ba	777
marcozecchini	0:9fca2b23d0ba	778	mac_enc = keyblk;
marcozecchini	0:9fca2b23d0ba	779	mac_dec = keyblk + transform->maclen;
marcozecchini	0:9fca2b23d0ba	780
marcozecchini	0:9fca2b23d0ba	781	/*
marcozecchini	0:9fca2b23d0ba	782	* This is not used in TLS v1.1.
marcozecchini	0:9fca2b23d0ba	783	*/
marcozecchini	0:9fca2b23d0ba	784	iv_copy_len = ( transform->fixed_ivlen ) ?
marcozecchini	0:9fca2b23d0ba	785	transform->fixed_ivlen : transform->ivlen;
marcozecchini	0:9fca2b23d0ba	786	memcpy( transform->iv_enc, key2 + transform->keylen, iv_copy_len );
marcozecchini	0:9fca2b23d0ba	787	memcpy( transform->iv_dec, key2 + transform->keylen + iv_copy_len,
marcozecchini	0:9fca2b23d0ba	788	iv_copy_len );
marcozecchini	0:9fca2b23d0ba	789	}
marcozecchini	0:9fca2b23d0ba	790	else
marcozecchini	0:9fca2b23d0ba	791	#endif /* MBEDTLS_SSL_CLI_C */
marcozecchini	0:9fca2b23d0ba	792	#if defined(MBEDTLS_SSL_SRV_C)
marcozecchini	0:9fca2b23d0ba	793	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER )
marcozecchini	0:9fca2b23d0ba	794	{
marcozecchini	0:9fca2b23d0ba	795	key1 = keyblk + transform->maclen * 2 + transform->keylen;
marcozecchini	0:9fca2b23d0ba	796	key2 = keyblk + transform->maclen * 2;
marcozecchini	0:9fca2b23d0ba	797
marcozecchini	0:9fca2b23d0ba	798	mac_enc = keyblk + transform->maclen;
marcozecchini	0:9fca2b23d0ba	799	mac_dec = keyblk;
marcozecchini	0:9fca2b23d0ba	800
marcozecchini	0:9fca2b23d0ba	801	/*
marcozecchini	0:9fca2b23d0ba	802	* This is not used in TLS v1.1.
marcozecchini	0:9fca2b23d0ba	803	*/
marcozecchini	0:9fca2b23d0ba	804	iv_copy_len = ( transform->fixed_ivlen ) ?
marcozecchini	0:9fca2b23d0ba	805	transform->fixed_ivlen : transform->ivlen;
marcozecchini	0:9fca2b23d0ba	806	memcpy( transform->iv_dec, key1 + transform->keylen, iv_copy_len );
marcozecchini	0:9fca2b23d0ba	807	memcpy( transform->iv_enc, key1 + transform->keylen + iv_copy_len,
marcozecchini	0:9fca2b23d0ba	808	iv_copy_len );
marcozecchini	0:9fca2b23d0ba	809	}
marcozecchini	0:9fca2b23d0ba	810	else
marcozecchini	0:9fca2b23d0ba	811	#endif /* MBEDTLS_SSL_SRV_C */
marcozecchini	0:9fca2b23d0ba	812	{
marcozecchini	0:9fca2b23d0ba	813	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
marcozecchini	0:9fca2b23d0ba	814	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
marcozecchini	0:9fca2b23d0ba	815	}
marcozecchini	0:9fca2b23d0ba	816
marcozecchini	0:9fca2b23d0ba	817	#if defined(MBEDTLS_SSL_PROTO_SSL3)
marcozecchini	0:9fca2b23d0ba	818	if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 )
marcozecchini	0:9fca2b23d0ba	819	{
marcozecchini	0:9fca2b23d0ba	820	if( transform->maclen > sizeof transform->mac_enc )
marcozecchini	0:9fca2b23d0ba	821	{
marcozecchini	0:9fca2b23d0ba	822	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
marcozecchini	0:9fca2b23d0ba	823	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
marcozecchini	0:9fca2b23d0ba	824	}
marcozecchini	0:9fca2b23d0ba	825
marcozecchini	0:9fca2b23d0ba	826	memcpy( transform->mac_enc, mac_enc, transform->maclen );
marcozecchini	0:9fca2b23d0ba	827	memcpy( transform->mac_dec, mac_dec, transform->maclen );
marcozecchini	0:9fca2b23d0ba	828	}
marcozecchini	0:9fca2b23d0ba	829	else
marcozecchini	0:9fca2b23d0ba	830	#endif /* MBEDTLS_SSL_PROTO_SSL3 */
marcozecchini	0:9fca2b23d0ba	831	#if defined(MBEDTLS_SSL_PROTO_TLS1) \|\| defined(MBEDTLS_SSL_PROTO_TLS1_1) \|\| \
marcozecchini	0:9fca2b23d0ba	832	defined(MBEDTLS_SSL_PROTO_TLS1_2)
marcozecchini	0:9fca2b23d0ba	833	if( ssl->minor_ver >= MBEDTLS_SSL_MINOR_VERSION_1 )
marcozecchini	0:9fca2b23d0ba	834	{
marcozecchini	0:9fca2b23d0ba	835	mbedtls_md_hmac_starts( &transform->md_ctx_enc, mac_enc, transform->maclen );
marcozecchini	0:9fca2b23d0ba	836	mbedtls_md_hmac_starts( &transform->md_ctx_dec, mac_dec, transform->maclen );
marcozecchini	0:9fca2b23d0ba	837	}
marcozecchini	0:9fca2b23d0ba	838	else
marcozecchini	0:9fca2b23d0ba	839	#endif
marcozecchini	0:9fca2b23d0ba	840	{
marcozecchini	0:9fca2b23d0ba	841	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
marcozecchini	0:9fca2b23d0ba	842	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
marcozecchini	0:9fca2b23d0ba	843	}
marcozecchini	0:9fca2b23d0ba	844
marcozecchini	0:9fca2b23d0ba	845	#if defined(MBEDTLS_SSL_HW_RECORD_ACCEL)
marcozecchini	0:9fca2b23d0ba	846	if( mbedtls_ssl_hw_record_init != NULL )
marcozecchini	0:9fca2b23d0ba	847	{
marcozecchini	0:9fca2b23d0ba	848	int ret = 0;
marcozecchini	0:9fca2b23d0ba	849
marcozecchini	0:9fca2b23d0ba	850	MBEDTLS_SSL_DEBUG_MSG( 2, ( "going for mbedtls_ssl_hw_record_init()" ) );
marcozecchini	0:9fca2b23d0ba	851
marcozecchini	0:9fca2b23d0ba	852	if( ( ret = mbedtls_ssl_hw_record_init( ssl, key1, key2, transform->keylen,
marcozecchini	0:9fca2b23d0ba	853	transform->iv_enc, transform->iv_dec,
marcozecchini	0:9fca2b23d0ba	854	iv_copy_len,
marcozecchini	0:9fca2b23d0ba	855	mac_enc, mac_dec,
marcozecchini	0:9fca2b23d0ba	856	transform->maclen ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	857	{
marcozecchini	0:9fca2b23d0ba	858	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_hw_record_init", ret );
marcozecchini	0:9fca2b23d0ba	859	return( MBEDTLS_ERR_SSL_HW_ACCEL_FAILED );
marcozecchini	0:9fca2b23d0ba	860	}
marcozecchini	0:9fca2b23d0ba	861	}
marcozecchini	0:9fca2b23d0ba	862	#endif /* MBEDTLS_SSL_HW_RECORD_ACCEL */
marcozecchini	0:9fca2b23d0ba	863
marcozecchini	0:9fca2b23d0ba	864	#if defined(MBEDTLS_SSL_EXPORT_KEYS)
marcozecchini	0:9fca2b23d0ba	865	if( ssl->conf->f_export_keys != NULL )
marcozecchini	0:9fca2b23d0ba	866	{
marcozecchini	0:9fca2b23d0ba	867	ssl->conf->f_export_keys( ssl->conf->p_export_keys,
marcozecchini	0:9fca2b23d0ba	868	session->master, keyblk,
marcozecchini	0:9fca2b23d0ba	869	transform->maclen, transform->keylen,
marcozecchini	0:9fca2b23d0ba	870	iv_copy_len );
marcozecchini	0:9fca2b23d0ba	871	}
marcozecchini	0:9fca2b23d0ba	872	#endif
marcozecchini	0:9fca2b23d0ba	873
marcozecchini	0:9fca2b23d0ba	874	if( ( ret = mbedtls_cipher_setup( &transform->cipher_ctx_enc,
marcozecchini	0:9fca2b23d0ba	875	cipher_info ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	876	{
marcozecchini	0:9fca2b23d0ba	877	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_cipher_setup", ret );
marcozecchini	0:9fca2b23d0ba	878	return( ret );
marcozecchini	0:9fca2b23d0ba	879	}
marcozecchini	0:9fca2b23d0ba	880
marcozecchini	0:9fca2b23d0ba	881	if( ( ret = mbedtls_cipher_setup( &transform->cipher_ctx_dec,
marcozecchini	0:9fca2b23d0ba	882	cipher_info ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	883	{
marcozecchini	0:9fca2b23d0ba	884	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_cipher_setup", ret );
marcozecchini	0:9fca2b23d0ba	885	return( ret );
marcozecchini	0:9fca2b23d0ba	886	}
marcozecchini	0:9fca2b23d0ba	887
marcozecchini	0:9fca2b23d0ba	888	if( ( ret = mbedtls_cipher_setkey( &transform->cipher_ctx_enc, key1,
marcozecchini	0:9fca2b23d0ba	889	cipher_info->key_bitlen,
marcozecchini	0:9fca2b23d0ba	890	MBEDTLS_ENCRYPT ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	891	{
marcozecchini	0:9fca2b23d0ba	892	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_cipher_setkey", ret );
marcozecchini	0:9fca2b23d0ba	893	return( ret );
marcozecchini	0:9fca2b23d0ba	894	}
marcozecchini	0:9fca2b23d0ba	895
marcozecchini	0:9fca2b23d0ba	896	if( ( ret = mbedtls_cipher_setkey( &transform->cipher_ctx_dec, key2,
marcozecchini	0:9fca2b23d0ba	897	cipher_info->key_bitlen,
marcozecchini	0:9fca2b23d0ba	898	MBEDTLS_DECRYPT ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	899	{
marcozecchini	0:9fca2b23d0ba	900	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_cipher_setkey", ret );
marcozecchini	0:9fca2b23d0ba	901	return( ret );
marcozecchini	0:9fca2b23d0ba	902	}
marcozecchini	0:9fca2b23d0ba	903
marcozecchini	0:9fca2b23d0ba	904	#if defined(MBEDTLS_CIPHER_MODE_CBC)
marcozecchini	0:9fca2b23d0ba	905	if( cipher_info->mode == MBEDTLS_MODE_CBC )
marcozecchini	0:9fca2b23d0ba	906	{
marcozecchini	0:9fca2b23d0ba	907	if( ( ret = mbedtls_cipher_set_padding_mode( &transform->cipher_ctx_enc,
marcozecchini	0:9fca2b23d0ba	908	MBEDTLS_PADDING_NONE ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	909	{
marcozecchini	0:9fca2b23d0ba	910	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_cipher_set_padding_mode", ret );
marcozecchini	0:9fca2b23d0ba	911	return( ret );
marcozecchini	0:9fca2b23d0ba	912	}
marcozecchini	0:9fca2b23d0ba	913
marcozecchini	0:9fca2b23d0ba	914	if( ( ret = mbedtls_cipher_set_padding_mode( &transform->cipher_ctx_dec,
marcozecchini	0:9fca2b23d0ba	915	MBEDTLS_PADDING_NONE ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	916	{
marcozecchini	0:9fca2b23d0ba	917	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_cipher_set_padding_mode", ret );
marcozecchini	0:9fca2b23d0ba	918	return( ret );
marcozecchini	0:9fca2b23d0ba	919	}
marcozecchini	0:9fca2b23d0ba	920	}
marcozecchini	0:9fca2b23d0ba	921	#endif /* MBEDTLS_CIPHER_MODE_CBC */
marcozecchini	0:9fca2b23d0ba	922
marcozecchini	0:9fca2b23d0ba	923	mbedtls_zeroize( keyblk, sizeof( keyblk ) );
marcozecchini	0:9fca2b23d0ba	924
marcozecchini	0:9fca2b23d0ba	925	#if defined(MBEDTLS_ZLIB_SUPPORT)
marcozecchini	0:9fca2b23d0ba	926	// Initialize compression
marcozecchini	0:9fca2b23d0ba	927	//
marcozecchini	0:9fca2b23d0ba	928	if( session->compression == MBEDTLS_SSL_COMPRESS_DEFLATE )
marcozecchini	0:9fca2b23d0ba	929	{
marcozecchini	0:9fca2b23d0ba	930	if( ssl->compress_buf == NULL )
marcozecchini	0:9fca2b23d0ba	931	{
marcozecchini	0:9fca2b23d0ba	932	MBEDTLS_SSL_DEBUG_MSG( 3, ( "Allocating compression buffer" ) );
marcozecchini	0:9fca2b23d0ba	933	ssl->compress_buf = mbedtls_calloc( 1, MBEDTLS_SSL_BUFFER_LEN );
marcozecchini	0:9fca2b23d0ba	934	if( ssl->compress_buf == NULL )
marcozecchini	0:9fca2b23d0ba	935	{
marcozecchini	0:9fca2b23d0ba	936	MBEDTLS_SSL_DEBUG_MSG( 1, ( "alloc(%d bytes) failed",
marcozecchini	0:9fca2b23d0ba	937	MBEDTLS_SSL_BUFFER_LEN ) );
marcozecchini	0:9fca2b23d0ba	938	return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
marcozecchini	0:9fca2b23d0ba	939	}
marcozecchini	0:9fca2b23d0ba	940	}
marcozecchini	0:9fca2b23d0ba	941
marcozecchini	0:9fca2b23d0ba	942	MBEDTLS_SSL_DEBUG_MSG( 3, ( "Initializing zlib states" ) );
marcozecchini	0:9fca2b23d0ba	943
marcozecchini	0:9fca2b23d0ba	944	memset( &transform->ctx_deflate, 0, sizeof( transform->ctx_deflate ) );
marcozecchini	0:9fca2b23d0ba	945	memset( &transform->ctx_inflate, 0, sizeof( transform->ctx_inflate ) );
marcozecchini	0:9fca2b23d0ba	946
marcozecchini	0:9fca2b23d0ba	947	if( deflateInit( &transform->ctx_deflate,
marcozecchini	0:9fca2b23d0ba	948	Z_DEFAULT_COMPRESSION ) != Z_OK \|\|
marcozecchini	0:9fca2b23d0ba	949	inflateInit( &transform->ctx_inflate ) != Z_OK )
marcozecchini	0:9fca2b23d0ba	950	{
marcozecchini	0:9fca2b23d0ba	951	MBEDTLS_SSL_DEBUG_MSG( 1, ( "Failed to initialize compression" ) );
marcozecchini	0:9fca2b23d0ba	952	return( MBEDTLS_ERR_SSL_COMPRESSION_FAILED );
marcozecchini	0:9fca2b23d0ba	953	}
marcozecchini	0:9fca2b23d0ba	954	}
marcozecchini	0:9fca2b23d0ba	955	#endif /* MBEDTLS_ZLIB_SUPPORT */
marcozecchini	0:9fca2b23d0ba	956
marcozecchini	0:9fca2b23d0ba	957	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= derive keys" ) );
marcozecchini	0:9fca2b23d0ba	958
marcozecchini	0:9fca2b23d0ba	959	return( 0 );
marcozecchini	0:9fca2b23d0ba	960	}
marcozecchini	0:9fca2b23d0ba	961
marcozecchini	0:9fca2b23d0ba	962	#if defined(MBEDTLS_SSL_PROTO_SSL3)
marcozecchini	0:9fca2b23d0ba	963	void ssl_calc_verify_ssl( mbedtls_ssl_context *ssl, unsigned char hash[36] )
marcozecchini	0:9fca2b23d0ba	964	{
marcozecchini	0:9fca2b23d0ba	965	mbedtls_md5_context md5;
marcozecchini	0:9fca2b23d0ba	966	mbedtls_sha1_context sha1;
marcozecchini	0:9fca2b23d0ba	967	unsigned char pad_1[48];
marcozecchini	0:9fca2b23d0ba	968	unsigned char pad_2[48];
marcozecchini	0:9fca2b23d0ba	969
marcozecchini	0:9fca2b23d0ba	970	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> calc verify ssl" ) );
marcozecchini	0:9fca2b23d0ba	971
marcozecchini	0:9fca2b23d0ba	972	mbedtls_md5_init( &md5 );
marcozecchini	0:9fca2b23d0ba	973	mbedtls_sha1_init( &sha1 );
marcozecchini	0:9fca2b23d0ba	974
marcozecchini	0:9fca2b23d0ba	975	mbedtls_md5_clone( &md5, &ssl->handshake->fin_md5 );
marcozecchini	0:9fca2b23d0ba	976	mbedtls_sha1_clone( &sha1, &ssl->handshake->fin_sha1 );
marcozecchini	0:9fca2b23d0ba	977
marcozecchini	0:9fca2b23d0ba	978	memset( pad_1, 0x36, 48 );
marcozecchini	0:9fca2b23d0ba	979	memset( pad_2, 0x5C, 48 );
marcozecchini	0:9fca2b23d0ba	980
marcozecchini	0:9fca2b23d0ba	981	mbedtls_md5_update( &md5, ssl->session_negotiate->master, 48 );
marcozecchini	0:9fca2b23d0ba	982	mbedtls_md5_update( &md5, pad_1, 48 );
marcozecchini	0:9fca2b23d0ba	983	mbedtls_md5_finish( &md5, hash );
marcozecchini	0:9fca2b23d0ba	984
marcozecchini	0:9fca2b23d0ba	985	mbedtls_md5_starts( &md5 );
marcozecchini	0:9fca2b23d0ba	986	mbedtls_md5_update( &md5, ssl->session_negotiate->master, 48 );
marcozecchini	0:9fca2b23d0ba	987	mbedtls_md5_update( &md5, pad_2, 48 );
marcozecchini	0:9fca2b23d0ba	988	mbedtls_md5_update( &md5, hash, 16 );
marcozecchini	0:9fca2b23d0ba	989	mbedtls_md5_finish( &md5, hash );
marcozecchini	0:9fca2b23d0ba	990
marcozecchini	0:9fca2b23d0ba	991	mbedtls_sha1_update( &sha1, ssl->session_negotiate->master, 48 );
marcozecchini	0:9fca2b23d0ba	992	mbedtls_sha1_update( &sha1, pad_1, 40 );
marcozecchini	0:9fca2b23d0ba	993	mbedtls_sha1_finish( &sha1, hash + 16 );
marcozecchini	0:9fca2b23d0ba	994
marcozecchini	0:9fca2b23d0ba	995	mbedtls_sha1_starts( &sha1 );
marcozecchini	0:9fca2b23d0ba	996	mbedtls_sha1_update( &sha1, ssl->session_negotiate->master, 48 );
marcozecchini	0:9fca2b23d0ba	997	mbedtls_sha1_update( &sha1, pad_2, 40 );
marcozecchini	0:9fca2b23d0ba	998	mbedtls_sha1_update( &sha1, hash + 16, 20 );
marcozecchini	0:9fca2b23d0ba	999	mbedtls_sha1_finish( &sha1, hash + 16 );
marcozecchini	0:9fca2b23d0ba	1000
marcozecchini	0:9fca2b23d0ba	1001	MBEDTLS_SSL_DEBUG_BUF( 3, "calculated verify result", hash, 36 );
marcozecchini	0:9fca2b23d0ba	1002	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= calc verify" ) );
marcozecchini	0:9fca2b23d0ba	1003
marcozecchini	0:9fca2b23d0ba	1004	mbedtls_md5_free( &md5 );
marcozecchini	0:9fca2b23d0ba	1005	mbedtls_sha1_free( &sha1 );
marcozecchini	0:9fca2b23d0ba	1006
marcozecchini	0:9fca2b23d0ba	1007	return;
marcozecchini	0:9fca2b23d0ba	1008	}
marcozecchini	0:9fca2b23d0ba	1009	#endif /* MBEDTLS_SSL_PROTO_SSL3 */
marcozecchini	0:9fca2b23d0ba	1010
marcozecchini	0:9fca2b23d0ba	1011	#if defined(MBEDTLS_SSL_PROTO_TLS1) \|\| defined(MBEDTLS_SSL_PROTO_TLS1_1)
marcozecchini	0:9fca2b23d0ba	1012	void ssl_calc_verify_tls( mbedtls_ssl_context *ssl, unsigned char hash[36] )
marcozecchini	0:9fca2b23d0ba	1013	{
marcozecchini	0:9fca2b23d0ba	1014	mbedtls_md5_context md5;
marcozecchini	0:9fca2b23d0ba	1015	mbedtls_sha1_context sha1;
marcozecchini	0:9fca2b23d0ba	1016
marcozecchini	0:9fca2b23d0ba	1017	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> calc verify tls" ) );
marcozecchini	0:9fca2b23d0ba	1018
marcozecchini	0:9fca2b23d0ba	1019	mbedtls_md5_init( &md5 );
marcozecchini	0:9fca2b23d0ba	1020	mbedtls_sha1_init( &sha1 );
marcozecchini	0:9fca2b23d0ba	1021
marcozecchini	0:9fca2b23d0ba	1022	mbedtls_md5_clone( &md5, &ssl->handshake->fin_md5 );
marcozecchini	0:9fca2b23d0ba	1023	mbedtls_sha1_clone( &sha1, &ssl->handshake->fin_sha1 );
marcozecchini	0:9fca2b23d0ba	1024
marcozecchini	0:9fca2b23d0ba	1025	mbedtls_md5_finish( &md5, hash );
marcozecchini	0:9fca2b23d0ba	1026	mbedtls_sha1_finish( &sha1, hash + 16 );
marcozecchini	0:9fca2b23d0ba	1027
marcozecchini	0:9fca2b23d0ba	1028	MBEDTLS_SSL_DEBUG_BUF( 3, "calculated verify result", hash, 36 );
marcozecchini	0:9fca2b23d0ba	1029	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= calc verify" ) );
marcozecchini	0:9fca2b23d0ba	1030
marcozecchini	0:9fca2b23d0ba	1031	mbedtls_md5_free( &md5 );
marcozecchini	0:9fca2b23d0ba	1032	mbedtls_sha1_free( &sha1 );
marcozecchini	0:9fca2b23d0ba	1033
marcozecchini	0:9fca2b23d0ba	1034	return;
marcozecchini	0:9fca2b23d0ba	1035	}
marcozecchini	0:9fca2b23d0ba	1036	#endif /* MBEDTLS_SSL_PROTO_TLS1 \|\| MBEDTLS_SSL_PROTO_TLS1_1 */
marcozecchini	0:9fca2b23d0ba	1037
marcozecchini	0:9fca2b23d0ba	1038	#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
marcozecchini	0:9fca2b23d0ba	1039	#if defined(MBEDTLS_SHA256_C)
marcozecchini	0:9fca2b23d0ba	1040	void ssl_calc_verify_tls_sha256( mbedtls_ssl_context *ssl, unsigned char hash[32] )
marcozecchini	0:9fca2b23d0ba	1041	{
marcozecchini	0:9fca2b23d0ba	1042	mbedtls_sha256_context sha256;
marcozecchini	0:9fca2b23d0ba	1043
marcozecchini	0:9fca2b23d0ba	1044	mbedtls_sha256_init( &sha256 );
marcozecchini	0:9fca2b23d0ba	1045
marcozecchini	0:9fca2b23d0ba	1046	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> calc verify sha256" ) );
marcozecchini	0:9fca2b23d0ba	1047
marcozecchini	0:9fca2b23d0ba	1048	mbedtls_sha256_clone( &sha256, &ssl->handshake->fin_sha256 );
marcozecchini	0:9fca2b23d0ba	1049	mbedtls_sha256_finish( &sha256, hash );
marcozecchini	0:9fca2b23d0ba	1050
marcozecchini	0:9fca2b23d0ba	1051	MBEDTLS_SSL_DEBUG_BUF( 3, "calculated verify result", hash, 32 );
marcozecchini	0:9fca2b23d0ba	1052	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= calc verify" ) );
marcozecchini	0:9fca2b23d0ba	1053
marcozecchini	0:9fca2b23d0ba	1054	mbedtls_sha256_free( &sha256 );
marcozecchini	0:9fca2b23d0ba	1055
marcozecchini	0:9fca2b23d0ba	1056	return;
marcozecchini	0:9fca2b23d0ba	1057	}
marcozecchini	0:9fca2b23d0ba	1058	#endif /* MBEDTLS_SHA256_C */
marcozecchini	0:9fca2b23d0ba	1059
marcozecchini	0:9fca2b23d0ba	1060	#if defined(MBEDTLS_SHA512_C)
marcozecchini	0:9fca2b23d0ba	1061	void ssl_calc_verify_tls_sha384( mbedtls_ssl_context *ssl, unsigned char hash[48] )
marcozecchini	0:9fca2b23d0ba	1062	{
marcozecchini	0:9fca2b23d0ba	1063	mbedtls_sha512_context sha512;
marcozecchini	0:9fca2b23d0ba	1064
marcozecchini	0:9fca2b23d0ba	1065	mbedtls_sha512_init( &sha512 );
marcozecchini	0:9fca2b23d0ba	1066
marcozecchini	0:9fca2b23d0ba	1067	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> calc verify sha384" ) );
marcozecchini	0:9fca2b23d0ba	1068
marcozecchini	0:9fca2b23d0ba	1069	mbedtls_sha512_clone( &sha512, &ssl->handshake->fin_sha512 );
marcozecchini	0:9fca2b23d0ba	1070	mbedtls_sha512_finish( &sha512, hash );
marcozecchini	0:9fca2b23d0ba	1071
marcozecchini	0:9fca2b23d0ba	1072	MBEDTLS_SSL_DEBUG_BUF( 3, "calculated verify result", hash, 48 );
marcozecchini	0:9fca2b23d0ba	1073	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= calc verify" ) );
marcozecchini	0:9fca2b23d0ba	1074
marcozecchini	0:9fca2b23d0ba	1075	mbedtls_sha512_free( &sha512 );
marcozecchini	0:9fca2b23d0ba	1076
marcozecchini	0:9fca2b23d0ba	1077	return;
marcozecchini	0:9fca2b23d0ba	1078	}
marcozecchini	0:9fca2b23d0ba	1079	#endif /* MBEDTLS_SHA512_C */
marcozecchini	0:9fca2b23d0ba	1080	#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
marcozecchini	0:9fca2b23d0ba	1081
marcozecchini	0:9fca2b23d0ba	1082	#if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
marcozecchini	0:9fca2b23d0ba	1083	int mbedtls_ssl_psk_derive_premaster( mbedtls_ssl_context *ssl, mbedtls_key_exchange_type_t key_ex )
marcozecchini	0:9fca2b23d0ba	1084	{
marcozecchini	0:9fca2b23d0ba	1085	unsigned char *p = ssl->handshake->premaster;
marcozecchini	0:9fca2b23d0ba	1086	unsigned char *end = p + sizeof( ssl->handshake->premaster );
marcozecchini	0:9fca2b23d0ba	1087	const unsigned char *psk = ssl->conf->psk;
marcozecchini	0:9fca2b23d0ba	1088	size_t psk_len = ssl->conf->psk_len;
marcozecchini	0:9fca2b23d0ba	1089
marcozecchini	0:9fca2b23d0ba	1090	/* If the psk callback was called, use its result */
marcozecchini	0:9fca2b23d0ba	1091	if( ssl->handshake->psk != NULL )
marcozecchini	0:9fca2b23d0ba	1092	{
marcozecchini	0:9fca2b23d0ba	1093	psk = ssl->handshake->psk;
marcozecchini	0:9fca2b23d0ba	1094	psk_len = ssl->handshake->psk_len;
marcozecchini	0:9fca2b23d0ba	1095	}
marcozecchini	0:9fca2b23d0ba	1096
marcozecchini	0:9fca2b23d0ba	1097	/*
marcozecchini	0:9fca2b23d0ba	1098	* PMS = struct {
marcozecchini	0:9fca2b23d0ba	1099	* opaque other_secret<0..2^16-1>;
marcozecchini	0:9fca2b23d0ba	1100	* opaque psk<0..2^16-1>;
marcozecchini	0:9fca2b23d0ba	1101	* };
marcozecchini	0:9fca2b23d0ba	1102	* with "other_secret" depending on the particular key exchange
marcozecchini	0:9fca2b23d0ba	1103	*/
marcozecchini	0:9fca2b23d0ba	1104	#if defined(MBEDTLS_KEY_EXCHANGE_PSK_ENABLED)
marcozecchini	0:9fca2b23d0ba	1105	if( key_ex == MBEDTLS_KEY_EXCHANGE_PSK )
marcozecchini	0:9fca2b23d0ba	1106	{
marcozecchini	0:9fca2b23d0ba	1107	if( end - p < 2 )
marcozecchini	0:9fca2b23d0ba	1108	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
marcozecchini	0:9fca2b23d0ba	1109
marcozecchini	0:9fca2b23d0ba	1110	*(p++) = (unsigned char)( psk_len >> 8 );
marcozecchini	0:9fca2b23d0ba	1111	*(p++) = (unsigned char)( psk_len );
marcozecchini	0:9fca2b23d0ba	1112
marcozecchini	0:9fca2b23d0ba	1113	if( end < p \|\| (size_t)( end - p ) < psk_len )
marcozecchini	0:9fca2b23d0ba	1114	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
marcozecchini	0:9fca2b23d0ba	1115
marcozecchini	0:9fca2b23d0ba	1116	memset( p, 0, psk_len );
marcozecchini	0:9fca2b23d0ba	1117	p += psk_len;
marcozecchini	0:9fca2b23d0ba	1118	}
marcozecchini	0:9fca2b23d0ba	1119	else
marcozecchini	0:9fca2b23d0ba	1120	#endif /* MBEDTLS_KEY_EXCHANGE_PSK_ENABLED */
marcozecchini	0:9fca2b23d0ba	1121	#if defined(MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED)
marcozecchini	0:9fca2b23d0ba	1122	if( key_ex == MBEDTLS_KEY_EXCHANGE_RSA_PSK )
marcozecchini	0:9fca2b23d0ba	1123	{
marcozecchini	0:9fca2b23d0ba	1124	/*
marcozecchini	0:9fca2b23d0ba	1125	* other_secret already set by the ClientKeyExchange message,
marcozecchini	0:9fca2b23d0ba	1126	* and is 48 bytes long
marcozecchini	0:9fca2b23d0ba	1127	*/
marcozecchini	0:9fca2b23d0ba	1128	*p++ = 0;
marcozecchini	0:9fca2b23d0ba	1129	*p++ = 48;
marcozecchini	0:9fca2b23d0ba	1130	p += 48;
marcozecchini	0:9fca2b23d0ba	1131	}
marcozecchini	0:9fca2b23d0ba	1132	else
marcozecchini	0:9fca2b23d0ba	1133	#endif /* MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED */
marcozecchini	0:9fca2b23d0ba	1134	#if defined(MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED)
marcozecchini	0:9fca2b23d0ba	1135	if( key_ex == MBEDTLS_KEY_EXCHANGE_DHE_PSK )
marcozecchini	0:9fca2b23d0ba	1136	{
marcozecchini	0:9fca2b23d0ba	1137	int ret;
marcozecchini	0:9fca2b23d0ba	1138	size_t len;
marcozecchini	0:9fca2b23d0ba	1139
marcozecchini	0:9fca2b23d0ba	1140	/* Write length only when we know the actual value */
marcozecchini	0:9fca2b23d0ba	1141	if( ( ret = mbedtls_dhm_calc_secret( &ssl->handshake->dhm_ctx,
marcozecchini	0:9fca2b23d0ba	1142	p + 2, end - ( p + 2 ), &len,
marcozecchini	0:9fca2b23d0ba	1143	ssl->conf->f_rng, ssl->conf->p_rng ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	1144	{
marcozecchini	0:9fca2b23d0ba	1145	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_dhm_calc_secret", ret );
marcozecchini	0:9fca2b23d0ba	1146	return( ret );
marcozecchini	0:9fca2b23d0ba	1147	}
marcozecchini	0:9fca2b23d0ba	1148	*(p++) = (unsigned char)( len >> 8 );
marcozecchini	0:9fca2b23d0ba	1149	*(p++) = (unsigned char)( len );
marcozecchini	0:9fca2b23d0ba	1150	p += len;
marcozecchini	0:9fca2b23d0ba	1151
marcozecchini	0:9fca2b23d0ba	1152	MBEDTLS_SSL_DEBUG_MPI( 3, "DHM: K ", &ssl->handshake->dhm_ctx.K );
marcozecchini	0:9fca2b23d0ba	1153	}
marcozecchini	0:9fca2b23d0ba	1154	else
marcozecchini	0:9fca2b23d0ba	1155	#endif /* MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED */
marcozecchini	0:9fca2b23d0ba	1156	#if defined(MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED)
marcozecchini	0:9fca2b23d0ba	1157	if( key_ex == MBEDTLS_KEY_EXCHANGE_ECDHE_PSK )
marcozecchini	0:9fca2b23d0ba	1158	{
marcozecchini	0:9fca2b23d0ba	1159	int ret;
marcozecchini	0:9fca2b23d0ba	1160	size_t zlen;
marcozecchini	0:9fca2b23d0ba	1161
marcozecchini	0:9fca2b23d0ba	1162	if( ( ret = mbedtls_ecdh_calc_secret( &ssl->handshake->ecdh_ctx, &zlen,
marcozecchini	0:9fca2b23d0ba	1163	p + 2, end - ( p + 2 ),
marcozecchini	0:9fca2b23d0ba	1164	ssl->conf->f_rng, ssl->conf->p_rng ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	1165	{
marcozecchini	0:9fca2b23d0ba	1166	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ecdh_calc_secret", ret );
marcozecchini	0:9fca2b23d0ba	1167	return( ret );
marcozecchini	0:9fca2b23d0ba	1168	}
marcozecchini	0:9fca2b23d0ba	1169
marcozecchini	0:9fca2b23d0ba	1170	*(p++) = (unsigned char)( zlen >> 8 );
marcozecchini	0:9fca2b23d0ba	1171	*(p++) = (unsigned char)( zlen );
marcozecchini	0:9fca2b23d0ba	1172	p += zlen;
marcozecchini	0:9fca2b23d0ba	1173
marcozecchini	0:9fca2b23d0ba	1174	MBEDTLS_SSL_DEBUG_MPI( 3, "ECDH: z", &ssl->handshake->ecdh_ctx.z );
marcozecchini	0:9fca2b23d0ba	1175	}
marcozecchini	0:9fca2b23d0ba	1176	else
marcozecchini	0:9fca2b23d0ba	1177	#endif /* MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED */
marcozecchini	0:9fca2b23d0ba	1178	{
marcozecchini	0:9fca2b23d0ba	1179	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
marcozecchini	0:9fca2b23d0ba	1180	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
marcozecchini	0:9fca2b23d0ba	1181	}
marcozecchini	0:9fca2b23d0ba	1182
marcozecchini	0:9fca2b23d0ba	1183	/* opaque psk<0..2^16-1>; */
marcozecchini	0:9fca2b23d0ba	1184	if( end - p < 2 )
marcozecchini	0:9fca2b23d0ba	1185	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
marcozecchini	0:9fca2b23d0ba	1186
marcozecchini	0:9fca2b23d0ba	1187	*(p++) = (unsigned char)( psk_len >> 8 );
marcozecchini	0:9fca2b23d0ba	1188	*(p++) = (unsigned char)( psk_len );
marcozecchini	0:9fca2b23d0ba	1189
marcozecchini	0:9fca2b23d0ba	1190	if( end < p \|\| (size_t)( end - p ) < psk_len )
marcozecchini	0:9fca2b23d0ba	1191	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
marcozecchini	0:9fca2b23d0ba	1192
marcozecchini	0:9fca2b23d0ba	1193	memcpy( p, psk, psk_len );
marcozecchini	0:9fca2b23d0ba	1194	p += psk_len;
marcozecchini	0:9fca2b23d0ba	1195
marcozecchini	0:9fca2b23d0ba	1196	ssl->handshake->pmslen = p - ssl->handshake->premaster;
marcozecchini	0:9fca2b23d0ba	1197
marcozecchini	0:9fca2b23d0ba	1198	return( 0 );
marcozecchini	0:9fca2b23d0ba	1199	}
marcozecchini	0:9fca2b23d0ba	1200	#endif /* MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED */
marcozecchini	0:9fca2b23d0ba	1201
marcozecchini	0:9fca2b23d0ba	1202	#if defined(MBEDTLS_SSL_PROTO_SSL3)
marcozecchini	0:9fca2b23d0ba	1203	/*
marcozecchini	0:9fca2b23d0ba	1204	* SSLv3.0 MAC functions
marcozecchini	0:9fca2b23d0ba	1205	*/
marcozecchini	0:9fca2b23d0ba	1206	static void ssl_mac( mbedtls_md_context_t md_ctx, unsigned char secret,
marcozecchini	0:9fca2b23d0ba	1207	unsigned char *buf, size_t len,
marcozecchini	0:9fca2b23d0ba	1208	unsigned char *ctr, int type )
marcozecchini	0:9fca2b23d0ba	1209	{
marcozecchini	0:9fca2b23d0ba	1210	unsigned char header[11];
marcozecchini	0:9fca2b23d0ba	1211	unsigned char padding[48];
marcozecchini	0:9fca2b23d0ba	1212	int padlen;
marcozecchini	0:9fca2b23d0ba	1213	int md_size = mbedtls_md_get_size( md_ctx->md_info );
marcozecchini	0:9fca2b23d0ba	1214	int md_type = mbedtls_md_get_type( md_ctx->md_info );
marcozecchini	0:9fca2b23d0ba	1215
marcozecchini	0:9fca2b23d0ba	1216	/* Only MD5 and SHA-1 supported */
marcozecchini	0:9fca2b23d0ba	1217	if( md_type == MBEDTLS_MD_MD5 )
marcozecchini	0:9fca2b23d0ba	1218	padlen = 48;
marcozecchini	0:9fca2b23d0ba	1219	else
marcozecchini	0:9fca2b23d0ba	1220	padlen = 40;
marcozecchini	0:9fca2b23d0ba	1221
marcozecchini	0:9fca2b23d0ba	1222	memcpy( header, ctr, 8 );
marcozecchini	0:9fca2b23d0ba	1223	header[ 8] = (unsigned char) type;
marcozecchini	0:9fca2b23d0ba	1224	header[ 9] = (unsigned char)( len >> 8 );
marcozecchini	0:9fca2b23d0ba	1225	header[10] = (unsigned char)( len );
marcozecchini	0:9fca2b23d0ba	1226
marcozecchini	0:9fca2b23d0ba	1227	memset( padding, 0x36, padlen );
marcozecchini	0:9fca2b23d0ba	1228	mbedtls_md_starts( md_ctx );
marcozecchini	0:9fca2b23d0ba	1229	mbedtls_md_update( md_ctx, secret, md_size );
marcozecchini	0:9fca2b23d0ba	1230	mbedtls_md_update( md_ctx, padding, padlen );
marcozecchini	0:9fca2b23d0ba	1231	mbedtls_md_update( md_ctx, header, 11 );
marcozecchini	0:9fca2b23d0ba	1232	mbedtls_md_update( md_ctx, buf, len );
marcozecchini	0:9fca2b23d0ba	1233	mbedtls_md_finish( md_ctx, buf + len );
marcozecchini	0:9fca2b23d0ba	1234
marcozecchini	0:9fca2b23d0ba	1235	memset( padding, 0x5C, padlen );
marcozecchini	0:9fca2b23d0ba	1236	mbedtls_md_starts( md_ctx );
marcozecchini	0:9fca2b23d0ba	1237	mbedtls_md_update( md_ctx, secret, md_size );
marcozecchini	0:9fca2b23d0ba	1238	mbedtls_md_update( md_ctx, padding, padlen );
marcozecchini	0:9fca2b23d0ba	1239	mbedtls_md_update( md_ctx, buf + len, md_size );
marcozecchini	0:9fca2b23d0ba	1240	mbedtls_md_finish( md_ctx, buf + len );
marcozecchini	0:9fca2b23d0ba	1241	}
marcozecchini	0:9fca2b23d0ba	1242	#endif /* MBEDTLS_SSL_PROTO_SSL3 */
marcozecchini	0:9fca2b23d0ba	1243
marcozecchini	0:9fca2b23d0ba	1244	#if defined(MBEDTLS_ARC4_C) \|\| defined(MBEDTLS_CIPHER_NULL_CIPHER) \|\| \
marcozecchini	0:9fca2b23d0ba	1245	( defined(MBEDTLS_CIPHER_MODE_CBC) && \
marcozecchini	0:9fca2b23d0ba	1246	( defined(MBEDTLS_AES_C) \|\| defined(MBEDTLS_CAMELLIA_C) ) )
marcozecchini	0:9fca2b23d0ba	1247	#define SSL_SOME_MODES_USE_MAC
marcozecchini	0:9fca2b23d0ba	1248	#endif
marcozecchini	0:9fca2b23d0ba	1249
marcozecchini	0:9fca2b23d0ba	1250	/*
marcozecchini	0:9fca2b23d0ba	1251	* Encryption/decryption functions
marcozecchini	0:9fca2b23d0ba	1252	*/
marcozecchini	0:9fca2b23d0ba	1253	static int ssl_encrypt_buf( mbedtls_ssl_context *ssl )
marcozecchini	0:9fca2b23d0ba	1254	{
marcozecchini	0:9fca2b23d0ba	1255	mbedtls_cipher_mode_t mode;
marcozecchini	0:9fca2b23d0ba	1256	int auth_done = 0;
marcozecchini	0:9fca2b23d0ba	1257
marcozecchini	0:9fca2b23d0ba	1258	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> encrypt buf" ) );
marcozecchini	0:9fca2b23d0ba	1259
marcozecchini	0:9fca2b23d0ba	1260	if( ssl->session_out == NULL \|\| ssl->transform_out == NULL )
marcozecchini	0:9fca2b23d0ba	1261	{
marcozecchini	0:9fca2b23d0ba	1262	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
marcozecchini	0:9fca2b23d0ba	1263	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
marcozecchini	0:9fca2b23d0ba	1264	}
marcozecchini	0:9fca2b23d0ba	1265
marcozecchini	0:9fca2b23d0ba	1266	mode = mbedtls_cipher_get_cipher_mode( &ssl->transform_out->cipher_ctx_enc );
marcozecchini	0:9fca2b23d0ba	1267
marcozecchini	0:9fca2b23d0ba	1268	MBEDTLS_SSL_DEBUG_BUF( 4, "before encrypt: output payload",
marcozecchini	0:9fca2b23d0ba	1269	ssl->out_msg, ssl->out_msglen );
marcozecchini	0:9fca2b23d0ba	1270
marcozecchini	0:9fca2b23d0ba	1271	/*
marcozecchini	0:9fca2b23d0ba	1272	* Add MAC before if needed
marcozecchini	0:9fca2b23d0ba	1273	*/
marcozecchini	0:9fca2b23d0ba	1274	#if defined(SSL_SOME_MODES_USE_MAC)
marcozecchini	0:9fca2b23d0ba	1275	if( mode == MBEDTLS_MODE_STREAM \|\|
marcozecchini	0:9fca2b23d0ba	1276	( mode == MBEDTLS_MODE_CBC
marcozecchini	0:9fca2b23d0ba	1277	#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
marcozecchini	0:9fca2b23d0ba	1278	&& ssl->session_out->encrypt_then_mac == MBEDTLS_SSL_ETM_DISABLED
marcozecchini	0:9fca2b23d0ba	1279	#endif
marcozecchini	0:9fca2b23d0ba	1280	) )
marcozecchini	0:9fca2b23d0ba	1281	{
marcozecchini	0:9fca2b23d0ba	1282	#if defined(MBEDTLS_SSL_PROTO_SSL3)
marcozecchini	0:9fca2b23d0ba	1283	if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 )
marcozecchini	0:9fca2b23d0ba	1284	{
marcozecchini	0:9fca2b23d0ba	1285	ssl_mac( &ssl->transform_out->md_ctx_enc,
marcozecchini	0:9fca2b23d0ba	1286	ssl->transform_out->mac_enc,
marcozecchini	0:9fca2b23d0ba	1287	ssl->out_msg, ssl->out_msglen,
marcozecchini	0:9fca2b23d0ba	1288	ssl->out_ctr, ssl->out_msgtype );
marcozecchini	0:9fca2b23d0ba	1289	}
marcozecchini	0:9fca2b23d0ba	1290	else
marcozecchini	0:9fca2b23d0ba	1291	#endif
marcozecchini	0:9fca2b23d0ba	1292	#if defined(MBEDTLS_SSL_PROTO_TLS1) \|\| defined(MBEDTLS_SSL_PROTO_TLS1_1) \|\| \
marcozecchini	0:9fca2b23d0ba	1293	defined(MBEDTLS_SSL_PROTO_TLS1_2)
marcozecchini	0:9fca2b23d0ba	1294	if( ssl->minor_ver >= MBEDTLS_SSL_MINOR_VERSION_1 )
marcozecchini	0:9fca2b23d0ba	1295	{
marcozecchini	0:9fca2b23d0ba	1296	mbedtls_md_hmac_update( &ssl->transform_out->md_ctx_enc, ssl->out_ctr, 8 );
marcozecchini	0:9fca2b23d0ba	1297	mbedtls_md_hmac_update( &ssl->transform_out->md_ctx_enc, ssl->out_hdr, 3 );
marcozecchini	0:9fca2b23d0ba	1298	mbedtls_md_hmac_update( &ssl->transform_out->md_ctx_enc, ssl->out_len, 2 );
marcozecchini	0:9fca2b23d0ba	1299	mbedtls_md_hmac_update( &ssl->transform_out->md_ctx_enc,
marcozecchini	0:9fca2b23d0ba	1300	ssl->out_msg, ssl->out_msglen );
marcozecchini	0:9fca2b23d0ba	1301	mbedtls_md_hmac_finish( &ssl->transform_out->md_ctx_enc,
marcozecchini	0:9fca2b23d0ba	1302	ssl->out_msg + ssl->out_msglen );
marcozecchini	0:9fca2b23d0ba	1303	mbedtls_md_hmac_reset( &ssl->transform_out->md_ctx_enc );
marcozecchini	0:9fca2b23d0ba	1304	}
marcozecchini	0:9fca2b23d0ba	1305	else
marcozecchini	0:9fca2b23d0ba	1306	#endif
marcozecchini	0:9fca2b23d0ba	1307	{
marcozecchini	0:9fca2b23d0ba	1308	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
marcozecchini	0:9fca2b23d0ba	1309	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
marcozecchini	0:9fca2b23d0ba	1310	}
marcozecchini	0:9fca2b23d0ba	1311
marcozecchini	0:9fca2b23d0ba	1312	MBEDTLS_SSL_DEBUG_BUF( 4, "computed mac",
marcozecchini	0:9fca2b23d0ba	1313	ssl->out_msg + ssl->out_msglen,
marcozecchini	0:9fca2b23d0ba	1314	ssl->transform_out->maclen );
marcozecchini	0:9fca2b23d0ba	1315
marcozecchini	0:9fca2b23d0ba	1316	ssl->out_msglen += ssl->transform_out->maclen;
marcozecchini	0:9fca2b23d0ba	1317	auth_done++;
marcozecchini	0:9fca2b23d0ba	1318	}
marcozecchini	0:9fca2b23d0ba	1319	#endif /* AEAD not the only option */
marcozecchini	0:9fca2b23d0ba	1320
marcozecchini	0:9fca2b23d0ba	1321	/*
marcozecchini	0:9fca2b23d0ba	1322	* Encrypt
marcozecchini	0:9fca2b23d0ba	1323	*/
marcozecchini	0:9fca2b23d0ba	1324	#if defined(MBEDTLS_ARC4_C) \|\| defined(MBEDTLS_CIPHER_NULL_CIPHER)
marcozecchini	0:9fca2b23d0ba	1325	if( mode == MBEDTLS_MODE_STREAM )
marcozecchini	0:9fca2b23d0ba	1326	{
marcozecchini	0:9fca2b23d0ba	1327	int ret;
marcozecchini	0:9fca2b23d0ba	1328	size_t olen = 0;
marcozecchini	0:9fca2b23d0ba	1329
marcozecchini	0:9fca2b23d0ba	1330	MBEDTLS_SSL_DEBUG_MSG( 3, ( "before encrypt: msglen = %d, "
marcozecchini	0:9fca2b23d0ba	1331	"including %d bytes of padding",
marcozecchini	0:9fca2b23d0ba	1332	ssl->out_msglen, 0 ) );
marcozecchini	0:9fca2b23d0ba	1333
marcozecchini	0:9fca2b23d0ba	1334	if( ( ret = mbedtls_cipher_crypt( &ssl->transform_out->cipher_ctx_enc,
marcozecchini	0:9fca2b23d0ba	1335	ssl->transform_out->iv_enc,
marcozecchini	0:9fca2b23d0ba	1336	ssl->transform_out->ivlen,
marcozecchini	0:9fca2b23d0ba	1337	ssl->out_msg, ssl->out_msglen,
marcozecchini	0:9fca2b23d0ba	1338	ssl->out_msg, &olen ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	1339	{
marcozecchini	0:9fca2b23d0ba	1340	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_cipher_crypt", ret );
marcozecchini	0:9fca2b23d0ba	1341	return( ret );
marcozecchini	0:9fca2b23d0ba	1342	}
marcozecchini	0:9fca2b23d0ba	1343
marcozecchini	0:9fca2b23d0ba	1344	if( ssl->out_msglen != olen )
marcozecchini	0:9fca2b23d0ba	1345	{
marcozecchini	0:9fca2b23d0ba	1346	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
marcozecchini	0:9fca2b23d0ba	1347	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
marcozecchini	0:9fca2b23d0ba	1348	}
marcozecchini	0:9fca2b23d0ba	1349	}
marcozecchini	0:9fca2b23d0ba	1350	else
marcozecchini	0:9fca2b23d0ba	1351	#endif /* MBEDTLS_ARC4_C \|\| MBEDTLS_CIPHER_NULL_CIPHER */
marcozecchini	0:9fca2b23d0ba	1352	#if defined(MBEDTLS_GCM_C) \|\| defined(MBEDTLS_CCM_C)
marcozecchini	0:9fca2b23d0ba	1353	if( mode == MBEDTLS_MODE_GCM \|\|
marcozecchini	0:9fca2b23d0ba	1354	mode == MBEDTLS_MODE_CCM )
marcozecchini	0:9fca2b23d0ba	1355	{
marcozecchini	0:9fca2b23d0ba	1356	int ret;
marcozecchini	0:9fca2b23d0ba	1357	size_t enc_msglen, olen;
marcozecchini	0:9fca2b23d0ba	1358	unsigned char *enc_msg;
marcozecchini	0:9fca2b23d0ba	1359	unsigned char add_data[13];
marcozecchini	0:9fca2b23d0ba	1360	unsigned char taglen = ssl->transform_out->ciphersuite_info->flags &
marcozecchini	0:9fca2b23d0ba	1361	MBEDTLS_CIPHERSUITE_SHORT_TAG ? 8 : 16;
marcozecchini	0:9fca2b23d0ba	1362
marcozecchini	0:9fca2b23d0ba	1363	memcpy( add_data, ssl->out_ctr, 8 );
marcozecchini	0:9fca2b23d0ba	1364	add_data[8] = ssl->out_msgtype;
marcozecchini	0:9fca2b23d0ba	1365	mbedtls_ssl_write_version( ssl->major_ver, ssl->minor_ver,
marcozecchini	0:9fca2b23d0ba	1366	ssl->conf->transport, add_data + 9 );
marcozecchini	0:9fca2b23d0ba	1367	add_data[11] = ( ssl->out_msglen >> 8 ) & 0xFF;
marcozecchini	0:9fca2b23d0ba	1368	add_data[12] = ssl->out_msglen & 0xFF;
marcozecchini	0:9fca2b23d0ba	1369
marcozecchini	0:9fca2b23d0ba	1370	MBEDTLS_SSL_DEBUG_BUF( 4, "additional data used for AEAD",
marcozecchini	0:9fca2b23d0ba	1371	add_data, 13 );
marcozecchini	0:9fca2b23d0ba	1372
marcozecchini	0:9fca2b23d0ba	1373	/*
marcozecchini	0:9fca2b23d0ba	1374	* Generate IV
marcozecchini	0:9fca2b23d0ba	1375	*/
marcozecchini	0:9fca2b23d0ba	1376	if( ssl->transform_out->ivlen - ssl->transform_out->fixed_ivlen != 8 )
marcozecchini	0:9fca2b23d0ba	1377	{
marcozecchini	0:9fca2b23d0ba	1378	/* Reminder if we ever add an AEAD mode with a different size */
marcozecchini	0:9fca2b23d0ba	1379	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
marcozecchini	0:9fca2b23d0ba	1380	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
marcozecchini	0:9fca2b23d0ba	1381	}
marcozecchini	0:9fca2b23d0ba	1382
marcozecchini	0:9fca2b23d0ba	1383	memcpy( ssl->transform_out->iv_enc + ssl->transform_out->fixed_ivlen,
marcozecchini	0:9fca2b23d0ba	1384	ssl->out_ctr, 8 );
marcozecchini	0:9fca2b23d0ba	1385	memcpy( ssl->out_iv, ssl->out_ctr, 8 );
marcozecchini	0:9fca2b23d0ba	1386
marcozecchini	0:9fca2b23d0ba	1387	MBEDTLS_SSL_DEBUG_BUF( 4, "IV used", ssl->out_iv,
marcozecchini	0:9fca2b23d0ba	1388	ssl->transform_out->ivlen - ssl->transform_out->fixed_ivlen );
marcozecchini	0:9fca2b23d0ba	1389
marcozecchini	0:9fca2b23d0ba	1390	/*
marcozecchini	0:9fca2b23d0ba	1391	* Fix pointer positions and message length with added IV
marcozecchini	0:9fca2b23d0ba	1392	*/
marcozecchini	0:9fca2b23d0ba	1393	enc_msg = ssl->out_msg;
marcozecchini	0:9fca2b23d0ba	1394	enc_msglen = ssl->out_msglen;
marcozecchini	0:9fca2b23d0ba	1395	ssl->out_msglen += ssl->transform_out->ivlen -
marcozecchini	0:9fca2b23d0ba	1396	ssl->transform_out->fixed_ivlen;
marcozecchini	0:9fca2b23d0ba	1397
marcozecchini	0:9fca2b23d0ba	1398	MBEDTLS_SSL_DEBUG_MSG( 3, ( "before encrypt: msglen = %d, "
marcozecchini	0:9fca2b23d0ba	1399	"including %d bytes of padding",
marcozecchini	0:9fca2b23d0ba	1400	ssl->out_msglen, 0 ) );
marcozecchini	0:9fca2b23d0ba	1401
marcozecchini	0:9fca2b23d0ba	1402	/*
marcozecchini	0:9fca2b23d0ba	1403	* Encrypt and authenticate
marcozecchini	0:9fca2b23d0ba	1404	*/
marcozecchini	0:9fca2b23d0ba	1405	if( ( ret = mbedtls_cipher_auth_encrypt( &ssl->transform_out->cipher_ctx_enc,
marcozecchini	0:9fca2b23d0ba	1406	ssl->transform_out->iv_enc,
marcozecchini	0:9fca2b23d0ba	1407	ssl->transform_out->ivlen,
marcozecchini	0:9fca2b23d0ba	1408	add_data, 13,
marcozecchini	0:9fca2b23d0ba	1409	enc_msg, enc_msglen,
marcozecchini	0:9fca2b23d0ba	1410	enc_msg, &olen,
marcozecchini	0:9fca2b23d0ba	1411	enc_msg + enc_msglen, taglen ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	1412	{
marcozecchini	0:9fca2b23d0ba	1413	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_cipher_auth_encrypt", ret );
marcozecchini	0:9fca2b23d0ba	1414	return( ret );
marcozecchini	0:9fca2b23d0ba	1415	}
marcozecchini	0:9fca2b23d0ba	1416
marcozecchini	0:9fca2b23d0ba	1417	if( olen != enc_msglen )
marcozecchini	0:9fca2b23d0ba	1418	{
marcozecchini	0:9fca2b23d0ba	1419	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
marcozecchini	0:9fca2b23d0ba	1420	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
marcozecchini	0:9fca2b23d0ba	1421	}
marcozecchini	0:9fca2b23d0ba	1422
marcozecchini	0:9fca2b23d0ba	1423	ssl->out_msglen += taglen;
marcozecchini	0:9fca2b23d0ba	1424	auth_done++;
marcozecchini	0:9fca2b23d0ba	1425
marcozecchini	0:9fca2b23d0ba	1426	MBEDTLS_SSL_DEBUG_BUF( 4, "after encrypt: tag", enc_msg + enc_msglen, taglen );
marcozecchini	0:9fca2b23d0ba	1427	}
marcozecchini	0:9fca2b23d0ba	1428	else
marcozecchini	0:9fca2b23d0ba	1429	#endif /* MBEDTLS_GCM_C \|\| MBEDTLS_CCM_C */
marcozecchini	0:9fca2b23d0ba	1430	#if defined(MBEDTLS_CIPHER_MODE_CBC) && \
marcozecchini	0:9fca2b23d0ba	1431	( defined(MBEDTLS_AES_C) \|\| defined(MBEDTLS_CAMELLIA_C) )
marcozecchini	0:9fca2b23d0ba	1432	if( mode == MBEDTLS_MODE_CBC )
marcozecchini	0:9fca2b23d0ba	1433	{
marcozecchini	0:9fca2b23d0ba	1434	int ret;
marcozecchini	0:9fca2b23d0ba	1435	unsigned char *enc_msg;
marcozecchini	0:9fca2b23d0ba	1436	size_t enc_msglen, padlen, olen = 0, i;
marcozecchini	0:9fca2b23d0ba	1437
marcozecchini	0:9fca2b23d0ba	1438	padlen = ssl->transform_out->ivlen - ( ssl->out_msglen + 1 ) %
marcozecchini	0:9fca2b23d0ba	1439	ssl->transform_out->ivlen;
marcozecchini	0:9fca2b23d0ba	1440	if( padlen == ssl->transform_out->ivlen )
marcozecchini	0:9fca2b23d0ba	1441	padlen = 0;
marcozecchini	0:9fca2b23d0ba	1442
marcozecchini	0:9fca2b23d0ba	1443	for( i = 0; i <= padlen; i++ )
marcozecchini	0:9fca2b23d0ba	1444	ssl->out_msg[ssl->out_msglen + i] = (unsigned char) padlen;
marcozecchini	0:9fca2b23d0ba	1445
marcozecchini	0:9fca2b23d0ba	1446	ssl->out_msglen += padlen + 1;
marcozecchini	0:9fca2b23d0ba	1447
marcozecchini	0:9fca2b23d0ba	1448	enc_msglen = ssl->out_msglen;
marcozecchini	0:9fca2b23d0ba	1449	enc_msg = ssl->out_msg;
marcozecchini	0:9fca2b23d0ba	1450
marcozecchini	0:9fca2b23d0ba	1451	#if defined(MBEDTLS_SSL_PROTO_TLS1_1) \|\| defined(MBEDTLS_SSL_PROTO_TLS1_2)
marcozecchini	0:9fca2b23d0ba	1452	/*
marcozecchini	0:9fca2b23d0ba	1453	* Prepend per-record IV for block cipher in TLS v1.1 and up as per
marcozecchini	0:9fca2b23d0ba	1454	* Method 1 (6.2.3.2. in RFC4346 and RFC5246)
marcozecchini	0:9fca2b23d0ba	1455	*/
marcozecchini	0:9fca2b23d0ba	1456	if( ssl->minor_ver >= MBEDTLS_SSL_MINOR_VERSION_2 )
marcozecchini	0:9fca2b23d0ba	1457	{
marcozecchini	0:9fca2b23d0ba	1458	/*
marcozecchini	0:9fca2b23d0ba	1459	* Generate IV
marcozecchini	0:9fca2b23d0ba	1460	*/
marcozecchini	0:9fca2b23d0ba	1461	ret = ssl->conf->f_rng( ssl->conf->p_rng, ssl->transform_out->iv_enc,
marcozecchini	0:9fca2b23d0ba	1462	ssl->transform_out->ivlen );
marcozecchini	0:9fca2b23d0ba	1463	if( ret != 0 )
marcozecchini	0:9fca2b23d0ba	1464	return( ret );
marcozecchini	0:9fca2b23d0ba	1465
marcozecchini	0:9fca2b23d0ba	1466	memcpy( ssl->out_iv, ssl->transform_out->iv_enc,
marcozecchini	0:9fca2b23d0ba	1467	ssl->transform_out->ivlen );
marcozecchini	0:9fca2b23d0ba	1468
marcozecchini	0:9fca2b23d0ba	1469	/*
marcozecchini	0:9fca2b23d0ba	1470	* Fix pointer positions and message length with added IV
marcozecchini	0:9fca2b23d0ba	1471	*/
marcozecchini	0:9fca2b23d0ba	1472	enc_msg = ssl->out_msg;
marcozecchini	0:9fca2b23d0ba	1473	enc_msglen = ssl->out_msglen;
marcozecchini	0:9fca2b23d0ba	1474	ssl->out_msglen += ssl->transform_out->ivlen;
marcozecchini	0:9fca2b23d0ba	1475	}
marcozecchini	0:9fca2b23d0ba	1476	#endif /* MBEDTLS_SSL_PROTO_TLS1_1 \|\| MBEDTLS_SSL_PROTO_TLS1_2 */
marcozecchini	0:9fca2b23d0ba	1477
marcozecchini	0:9fca2b23d0ba	1478	MBEDTLS_SSL_DEBUG_MSG( 3, ( "before encrypt: msglen = %d, "
marcozecchini	0:9fca2b23d0ba	1479	"including %d bytes of IV and %d bytes of padding",
marcozecchini	0:9fca2b23d0ba	1480	ssl->out_msglen, ssl->transform_out->ivlen,
marcozecchini	0:9fca2b23d0ba	1481	padlen + 1 ) );
marcozecchini	0:9fca2b23d0ba	1482
marcozecchini	0:9fca2b23d0ba	1483	if( ( ret = mbedtls_cipher_crypt( &ssl->transform_out->cipher_ctx_enc,
marcozecchini	0:9fca2b23d0ba	1484	ssl->transform_out->iv_enc,
marcozecchini	0:9fca2b23d0ba	1485	ssl->transform_out->ivlen,
marcozecchini	0:9fca2b23d0ba	1486	enc_msg, enc_msglen,
marcozecchini	0:9fca2b23d0ba	1487	enc_msg, &olen ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	1488	{
marcozecchini	0:9fca2b23d0ba	1489	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_cipher_crypt", ret );
marcozecchini	0:9fca2b23d0ba	1490	return( ret );
marcozecchini	0:9fca2b23d0ba	1491	}
marcozecchini	0:9fca2b23d0ba	1492
marcozecchini	0:9fca2b23d0ba	1493	if( enc_msglen != olen )
marcozecchini	0:9fca2b23d0ba	1494	{
marcozecchini	0:9fca2b23d0ba	1495	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
marcozecchini	0:9fca2b23d0ba	1496	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
marcozecchini	0:9fca2b23d0ba	1497	}
marcozecchini	0:9fca2b23d0ba	1498
marcozecchini	0:9fca2b23d0ba	1499	#if defined(MBEDTLS_SSL_PROTO_SSL3) \|\| defined(MBEDTLS_SSL_PROTO_TLS1)
marcozecchini	0:9fca2b23d0ba	1500	if( ssl->minor_ver < MBEDTLS_SSL_MINOR_VERSION_2 )
marcozecchini	0:9fca2b23d0ba	1501	{
marcozecchini	0:9fca2b23d0ba	1502	/*
marcozecchini	0:9fca2b23d0ba	1503	* Save IV in SSL3 and TLS1
marcozecchini	0:9fca2b23d0ba	1504	*/
marcozecchini	0:9fca2b23d0ba	1505	memcpy( ssl->transform_out->iv_enc,
marcozecchini	0:9fca2b23d0ba	1506	ssl->transform_out->cipher_ctx_enc.iv,
marcozecchini	0:9fca2b23d0ba	1507	ssl->transform_out->ivlen );
marcozecchini	0:9fca2b23d0ba	1508	}
marcozecchini	0:9fca2b23d0ba	1509	#endif
marcozecchini	0:9fca2b23d0ba	1510
marcozecchini	0:9fca2b23d0ba	1511	#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
marcozecchini	0:9fca2b23d0ba	1512	if( auth_done == 0 )
marcozecchini	0:9fca2b23d0ba	1513	{
marcozecchini	0:9fca2b23d0ba	1514	/*
marcozecchini	0:9fca2b23d0ba	1515	* MAC(MAC_write_key, seq_num +
marcozecchini	0:9fca2b23d0ba	1516	* TLSCipherText.type +
marcozecchini	0:9fca2b23d0ba	1517	* TLSCipherText.version +
marcozecchini	0:9fca2b23d0ba	1518	* length_of( (IV +) ENC(...) ) +
marcozecchini	0:9fca2b23d0ba	1519	* IV + // except for TLS 1.0
marcozecchini	0:9fca2b23d0ba	1520	* ENC(content + padding + padding_length));
marcozecchini	0:9fca2b23d0ba	1521	*/
marcozecchini	0:9fca2b23d0ba	1522	unsigned char pseudo_hdr[13];
marcozecchini	0:9fca2b23d0ba	1523
marcozecchini	0:9fca2b23d0ba	1524	MBEDTLS_SSL_DEBUG_MSG( 3, ( "using encrypt then mac" ) );
marcozecchini	0:9fca2b23d0ba	1525
marcozecchini	0:9fca2b23d0ba	1526	memcpy( pseudo_hdr + 0, ssl->out_ctr, 8 );
marcozecchini	0:9fca2b23d0ba	1527	memcpy( pseudo_hdr + 8, ssl->out_hdr, 3 );
marcozecchini	0:9fca2b23d0ba	1528	pseudo_hdr[11] = (unsigned char)( ( ssl->out_msglen >> 8 ) & 0xFF );
marcozecchini	0:9fca2b23d0ba	1529	pseudo_hdr[12] = (unsigned char)( ( ssl->out_msglen ) & 0xFF );
marcozecchini	0:9fca2b23d0ba	1530
marcozecchini	0:9fca2b23d0ba	1531	MBEDTLS_SSL_DEBUG_BUF( 4, "MAC'd meta-data", pseudo_hdr, 13 );
marcozecchini	0:9fca2b23d0ba	1532
marcozecchini	0:9fca2b23d0ba	1533	mbedtls_md_hmac_update( &ssl->transform_out->md_ctx_enc, pseudo_hdr, 13 );
marcozecchini	0:9fca2b23d0ba	1534	mbedtls_md_hmac_update( &ssl->transform_out->md_ctx_enc,
marcozecchini	0:9fca2b23d0ba	1535	ssl->out_iv, ssl->out_msglen );
marcozecchini	0:9fca2b23d0ba	1536	mbedtls_md_hmac_finish( &ssl->transform_out->md_ctx_enc,
marcozecchini	0:9fca2b23d0ba	1537	ssl->out_iv + ssl->out_msglen );
marcozecchini	0:9fca2b23d0ba	1538	mbedtls_md_hmac_reset( &ssl->transform_out->md_ctx_enc );
marcozecchini	0:9fca2b23d0ba	1539
marcozecchini	0:9fca2b23d0ba	1540	ssl->out_msglen += ssl->transform_out->maclen;
marcozecchini	0:9fca2b23d0ba	1541	auth_done++;
marcozecchini	0:9fca2b23d0ba	1542	}
marcozecchini	0:9fca2b23d0ba	1543	#endif /* MBEDTLS_SSL_ENCRYPT_THEN_MAC */
marcozecchini	0:9fca2b23d0ba	1544	}
marcozecchini	0:9fca2b23d0ba	1545	else
marcozecchini	0:9fca2b23d0ba	1546	#endif /* MBEDTLS_CIPHER_MODE_CBC &&
marcozecchini	0:9fca2b23d0ba	1547	( MBEDTLS_AES_C \|\| MBEDTLS_CAMELLIA_C ) */
marcozecchini	0:9fca2b23d0ba	1548	{
marcozecchini	0:9fca2b23d0ba	1549	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
marcozecchini	0:9fca2b23d0ba	1550	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
marcozecchini	0:9fca2b23d0ba	1551	}
marcozecchini	0:9fca2b23d0ba	1552
marcozecchini	0:9fca2b23d0ba	1553	/* Make extra sure authentication was performed, exactly once */
marcozecchini	0:9fca2b23d0ba	1554	if( auth_done != 1 )
marcozecchini	0:9fca2b23d0ba	1555	{
marcozecchini	0:9fca2b23d0ba	1556	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
marcozecchini	0:9fca2b23d0ba	1557	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
marcozecchini	0:9fca2b23d0ba	1558	}
marcozecchini	0:9fca2b23d0ba	1559
marcozecchini	0:9fca2b23d0ba	1560	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= encrypt buf" ) );
marcozecchini	0:9fca2b23d0ba	1561
marcozecchini	0:9fca2b23d0ba	1562	return( 0 );
marcozecchini	0:9fca2b23d0ba	1563	}
marcozecchini	0:9fca2b23d0ba	1564
marcozecchini	0:9fca2b23d0ba	1565	#define SSL_MAX_MAC_SIZE 48
marcozecchini	0:9fca2b23d0ba	1566
marcozecchini	0:9fca2b23d0ba	1567	static int ssl_decrypt_buf( mbedtls_ssl_context *ssl )
marcozecchini	0:9fca2b23d0ba	1568	{
marcozecchini	0:9fca2b23d0ba	1569	size_t i;
marcozecchini	0:9fca2b23d0ba	1570	mbedtls_cipher_mode_t mode;
marcozecchini	0:9fca2b23d0ba	1571	int auth_done = 0;
marcozecchini	0:9fca2b23d0ba	1572	#if defined(SSL_SOME_MODES_USE_MAC)
marcozecchini	0:9fca2b23d0ba	1573	size_t padlen = 0, correct = 1;
marcozecchini	0:9fca2b23d0ba	1574	#endif
marcozecchini	0:9fca2b23d0ba	1575
marcozecchini	0:9fca2b23d0ba	1576	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> decrypt buf" ) );
marcozecchini	0:9fca2b23d0ba	1577
marcozecchini	0:9fca2b23d0ba	1578	if( ssl->session_in == NULL \|\| ssl->transform_in == NULL )
marcozecchini	0:9fca2b23d0ba	1579	{
marcozecchini	0:9fca2b23d0ba	1580	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
marcozecchini	0:9fca2b23d0ba	1581	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
marcozecchini	0:9fca2b23d0ba	1582	}
marcozecchini	0:9fca2b23d0ba	1583
marcozecchini	0:9fca2b23d0ba	1584	mode = mbedtls_cipher_get_cipher_mode( &ssl->transform_in->cipher_ctx_dec );
marcozecchini	0:9fca2b23d0ba	1585
marcozecchini	0:9fca2b23d0ba	1586	if( ssl->in_msglen < ssl->transform_in->minlen )
marcozecchini	0:9fca2b23d0ba	1587	{
marcozecchini	0:9fca2b23d0ba	1588	MBEDTLS_SSL_DEBUG_MSG( 1, ( "in_msglen (%d) < minlen (%d)",
marcozecchini	0:9fca2b23d0ba	1589	ssl->in_msglen, ssl->transform_in->minlen ) );
marcozecchini	0:9fca2b23d0ba	1590	return( MBEDTLS_ERR_SSL_INVALID_MAC );
marcozecchini	0:9fca2b23d0ba	1591	}
marcozecchini	0:9fca2b23d0ba	1592
marcozecchini	0:9fca2b23d0ba	1593	#if defined(MBEDTLS_ARC4_C) \|\| defined(MBEDTLS_CIPHER_NULL_CIPHER)
marcozecchini	0:9fca2b23d0ba	1594	if( mode == MBEDTLS_MODE_STREAM )
marcozecchini	0:9fca2b23d0ba	1595	{
marcozecchini	0:9fca2b23d0ba	1596	int ret;
marcozecchini	0:9fca2b23d0ba	1597	size_t olen = 0;
marcozecchini	0:9fca2b23d0ba	1598
marcozecchini	0:9fca2b23d0ba	1599	padlen = 0;
marcozecchini	0:9fca2b23d0ba	1600
marcozecchini	0:9fca2b23d0ba	1601	if( ( ret = mbedtls_cipher_crypt( &ssl->transform_in->cipher_ctx_dec,
marcozecchini	0:9fca2b23d0ba	1602	ssl->transform_in->iv_dec,
marcozecchini	0:9fca2b23d0ba	1603	ssl->transform_in->ivlen,
marcozecchini	0:9fca2b23d0ba	1604	ssl->in_msg, ssl->in_msglen,
marcozecchini	0:9fca2b23d0ba	1605	ssl->in_msg, &olen ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	1606	{
marcozecchini	0:9fca2b23d0ba	1607	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_cipher_crypt", ret );
marcozecchini	0:9fca2b23d0ba	1608	return( ret );
marcozecchini	0:9fca2b23d0ba	1609	}
marcozecchini	0:9fca2b23d0ba	1610
marcozecchini	0:9fca2b23d0ba	1611	if( ssl->in_msglen != olen )
marcozecchini	0:9fca2b23d0ba	1612	{
marcozecchini	0:9fca2b23d0ba	1613	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
marcozecchini	0:9fca2b23d0ba	1614	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
marcozecchini	0:9fca2b23d0ba	1615	}
marcozecchini	0:9fca2b23d0ba	1616	}
marcozecchini	0:9fca2b23d0ba	1617	else
marcozecchini	0:9fca2b23d0ba	1618	#endif /* MBEDTLS_ARC4_C \|\| MBEDTLS_CIPHER_NULL_CIPHER */
marcozecchini	0:9fca2b23d0ba	1619	#if defined(MBEDTLS_GCM_C) \|\| defined(MBEDTLS_CCM_C)
marcozecchini	0:9fca2b23d0ba	1620	if( mode == MBEDTLS_MODE_GCM \|\|
marcozecchini	0:9fca2b23d0ba	1621	mode == MBEDTLS_MODE_CCM )
marcozecchini	0:9fca2b23d0ba	1622	{
marcozecchini	0:9fca2b23d0ba	1623	int ret;
marcozecchini	0:9fca2b23d0ba	1624	size_t dec_msglen, olen;
marcozecchini	0:9fca2b23d0ba	1625	unsigned char *dec_msg;
marcozecchini	0:9fca2b23d0ba	1626	unsigned char *dec_msg_result;
marcozecchini	0:9fca2b23d0ba	1627	unsigned char add_data[13];
marcozecchini	0:9fca2b23d0ba	1628	unsigned char taglen = ssl->transform_in->ciphersuite_info->flags &
marcozecchini	0:9fca2b23d0ba	1629	MBEDTLS_CIPHERSUITE_SHORT_TAG ? 8 : 16;
marcozecchini	0:9fca2b23d0ba	1630	size_t explicit_iv_len = ssl->transform_in->ivlen -
marcozecchini	0:9fca2b23d0ba	1631	ssl->transform_in->fixed_ivlen;
marcozecchini	0:9fca2b23d0ba	1632
marcozecchini	0:9fca2b23d0ba	1633	if( ssl->in_msglen < explicit_iv_len + taglen )
marcozecchini	0:9fca2b23d0ba	1634	{
marcozecchini	0:9fca2b23d0ba	1635	MBEDTLS_SSL_DEBUG_MSG( 1, ( "msglen (%d) < explicit_iv_len (%d) "
marcozecchini	0:9fca2b23d0ba	1636	"+ taglen (%d)", ssl->in_msglen,
marcozecchini	0:9fca2b23d0ba	1637	explicit_iv_len, taglen ) );
marcozecchini	0:9fca2b23d0ba	1638	return( MBEDTLS_ERR_SSL_INVALID_MAC );
marcozecchini	0:9fca2b23d0ba	1639	}
marcozecchini	0:9fca2b23d0ba	1640	dec_msglen = ssl->in_msglen - explicit_iv_len - taglen;
marcozecchini	0:9fca2b23d0ba	1641
marcozecchini	0:9fca2b23d0ba	1642	dec_msg = ssl->in_msg;
marcozecchini	0:9fca2b23d0ba	1643	dec_msg_result = ssl->in_msg;
marcozecchini	0:9fca2b23d0ba	1644	ssl->in_msglen = dec_msglen;
marcozecchini	0:9fca2b23d0ba	1645
marcozecchini	0:9fca2b23d0ba	1646	memcpy( add_data, ssl->in_ctr, 8 );
marcozecchini	0:9fca2b23d0ba	1647	add_data[8] = ssl->in_msgtype;
marcozecchini	0:9fca2b23d0ba	1648	mbedtls_ssl_write_version( ssl->major_ver, ssl->minor_ver,
marcozecchini	0:9fca2b23d0ba	1649	ssl->conf->transport, add_data + 9 );
marcozecchini	0:9fca2b23d0ba	1650	add_data[11] = ( ssl->in_msglen >> 8 ) & 0xFF;
marcozecchini	0:9fca2b23d0ba	1651	add_data[12] = ssl->in_msglen & 0xFF;
marcozecchini	0:9fca2b23d0ba	1652
marcozecchini	0:9fca2b23d0ba	1653	MBEDTLS_SSL_DEBUG_BUF( 4, "additional data used for AEAD",
marcozecchini	0:9fca2b23d0ba	1654	add_data, 13 );
marcozecchini	0:9fca2b23d0ba	1655
marcozecchini	0:9fca2b23d0ba	1656	memcpy( ssl->transform_in->iv_dec + ssl->transform_in->fixed_ivlen,
marcozecchini	0:9fca2b23d0ba	1657	ssl->in_iv,
marcozecchini	0:9fca2b23d0ba	1658	ssl->transform_in->ivlen - ssl->transform_in->fixed_ivlen );
marcozecchini	0:9fca2b23d0ba	1659
marcozecchini	0:9fca2b23d0ba	1660	MBEDTLS_SSL_DEBUG_BUF( 4, "IV used", ssl->transform_in->iv_dec,
marcozecchini	0:9fca2b23d0ba	1661	ssl->transform_in->ivlen );
marcozecchini	0:9fca2b23d0ba	1662	MBEDTLS_SSL_DEBUG_BUF( 4, "TAG used", dec_msg + dec_msglen, taglen );
marcozecchini	0:9fca2b23d0ba	1663
marcozecchini	0:9fca2b23d0ba	1664	/*
marcozecchini	0:9fca2b23d0ba	1665	* Decrypt and authenticate
marcozecchini	0:9fca2b23d0ba	1666	*/
marcozecchini	0:9fca2b23d0ba	1667	if( ( ret = mbedtls_cipher_auth_decrypt( &ssl->transform_in->cipher_ctx_dec,
marcozecchini	0:9fca2b23d0ba	1668	ssl->transform_in->iv_dec,
marcozecchini	0:9fca2b23d0ba	1669	ssl->transform_in->ivlen,
marcozecchini	0:9fca2b23d0ba	1670	add_data, 13,
marcozecchini	0:9fca2b23d0ba	1671	dec_msg, dec_msglen,
marcozecchini	0:9fca2b23d0ba	1672	dec_msg_result, &olen,
marcozecchini	0:9fca2b23d0ba	1673	dec_msg + dec_msglen, taglen ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	1674	{
marcozecchini	0:9fca2b23d0ba	1675	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_cipher_auth_decrypt", ret );
marcozecchini	0:9fca2b23d0ba	1676
marcozecchini	0:9fca2b23d0ba	1677	if( ret == MBEDTLS_ERR_CIPHER_AUTH_FAILED )
marcozecchini	0:9fca2b23d0ba	1678	return( MBEDTLS_ERR_SSL_INVALID_MAC );
marcozecchini	0:9fca2b23d0ba	1679
marcozecchini	0:9fca2b23d0ba	1680	return( ret );
marcozecchini	0:9fca2b23d0ba	1681	}
marcozecchini	0:9fca2b23d0ba	1682	auth_done++;
marcozecchini	0:9fca2b23d0ba	1683
marcozecchini	0:9fca2b23d0ba	1684	if( olen != dec_msglen )
marcozecchini	0:9fca2b23d0ba	1685	{
marcozecchini	0:9fca2b23d0ba	1686	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
marcozecchini	0:9fca2b23d0ba	1687	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
marcozecchini	0:9fca2b23d0ba	1688	}
marcozecchini	0:9fca2b23d0ba	1689	}
marcozecchini	0:9fca2b23d0ba	1690	else
marcozecchini	0:9fca2b23d0ba	1691	#endif /* MBEDTLS_GCM_C \|\| MBEDTLS_CCM_C */
marcozecchini	0:9fca2b23d0ba	1692	#if defined(MBEDTLS_CIPHER_MODE_CBC) && \
marcozecchini	0:9fca2b23d0ba	1693	( defined(MBEDTLS_AES_C) \|\| defined(MBEDTLS_CAMELLIA_C) )
marcozecchini	0:9fca2b23d0ba	1694	if( mode == MBEDTLS_MODE_CBC )
marcozecchini	0:9fca2b23d0ba	1695	{
marcozecchini	0:9fca2b23d0ba	1696	/*
marcozecchini	0:9fca2b23d0ba	1697	* Decrypt and check the padding
marcozecchini	0:9fca2b23d0ba	1698	*/
marcozecchini	0:9fca2b23d0ba	1699	int ret;
marcozecchini	0:9fca2b23d0ba	1700	unsigned char *dec_msg;
marcozecchini	0:9fca2b23d0ba	1701	unsigned char *dec_msg_result;
marcozecchini	0:9fca2b23d0ba	1702	size_t dec_msglen;
marcozecchini	0:9fca2b23d0ba	1703	size_t minlen = 0;
marcozecchini	0:9fca2b23d0ba	1704	size_t olen = 0;
marcozecchini	0:9fca2b23d0ba	1705
marcozecchini	0:9fca2b23d0ba	1706	/*
marcozecchini	0:9fca2b23d0ba	1707	* Check immediate ciphertext sanity
marcozecchini	0:9fca2b23d0ba	1708	*/
marcozecchini	0:9fca2b23d0ba	1709	#if defined(MBEDTLS_SSL_PROTO_TLS1_1) \|\| defined(MBEDTLS_SSL_PROTO_TLS1_2)
marcozecchini	0:9fca2b23d0ba	1710	if( ssl->minor_ver >= MBEDTLS_SSL_MINOR_VERSION_2 )
marcozecchini	0:9fca2b23d0ba	1711	minlen += ssl->transform_in->ivlen;
marcozecchini	0:9fca2b23d0ba	1712	#endif
marcozecchini	0:9fca2b23d0ba	1713
marcozecchini	0:9fca2b23d0ba	1714	if( ssl->in_msglen < minlen + ssl->transform_in->ivlen \|\|
marcozecchini	0:9fca2b23d0ba	1715	ssl->in_msglen < minlen + ssl->transform_in->maclen + 1 )
marcozecchini	0:9fca2b23d0ba	1716	{
marcozecchini	0:9fca2b23d0ba	1717	MBEDTLS_SSL_DEBUG_MSG( 1, ( "msglen (%d) < max( ivlen(%d), maclen (%d) "
marcozecchini	0:9fca2b23d0ba	1718	"+ 1 ) ( + expl IV )", ssl->in_msglen,
marcozecchini	0:9fca2b23d0ba	1719	ssl->transform_in->ivlen,
marcozecchini	0:9fca2b23d0ba	1720	ssl->transform_in->maclen ) );
marcozecchini	0:9fca2b23d0ba	1721	return( MBEDTLS_ERR_SSL_INVALID_MAC );
marcozecchini	0:9fca2b23d0ba	1722	}
marcozecchini	0:9fca2b23d0ba	1723
marcozecchini	0:9fca2b23d0ba	1724	dec_msglen = ssl->in_msglen;
marcozecchini	0:9fca2b23d0ba	1725	dec_msg = ssl->in_msg;
marcozecchini	0:9fca2b23d0ba	1726	dec_msg_result = ssl->in_msg;
marcozecchini	0:9fca2b23d0ba	1727
marcozecchini	0:9fca2b23d0ba	1728	/*
marcozecchini	0:9fca2b23d0ba	1729	* Authenticate before decrypt if enabled
marcozecchini	0:9fca2b23d0ba	1730	*/
marcozecchini	0:9fca2b23d0ba	1731	#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
marcozecchini	0:9fca2b23d0ba	1732	if( ssl->session_in->encrypt_then_mac == MBEDTLS_SSL_ETM_ENABLED )
marcozecchini	0:9fca2b23d0ba	1733	{
marcozecchini	0:9fca2b23d0ba	1734	unsigned char computed_mac[SSL_MAX_MAC_SIZE];
marcozecchini	0:9fca2b23d0ba	1735	unsigned char pseudo_hdr[13];
marcozecchini	0:9fca2b23d0ba	1736
marcozecchini	0:9fca2b23d0ba	1737	MBEDTLS_SSL_DEBUG_MSG( 3, ( "using encrypt then mac" ) );
marcozecchini	0:9fca2b23d0ba	1738
marcozecchini	0:9fca2b23d0ba	1739	dec_msglen -= ssl->transform_in->maclen;
marcozecchini	0:9fca2b23d0ba	1740	ssl->in_msglen -= ssl->transform_in->maclen;
marcozecchini	0:9fca2b23d0ba	1741
marcozecchini	0:9fca2b23d0ba	1742	memcpy( pseudo_hdr + 0, ssl->in_ctr, 8 );
marcozecchini	0:9fca2b23d0ba	1743	memcpy( pseudo_hdr + 8, ssl->in_hdr, 3 );
marcozecchini	0:9fca2b23d0ba	1744	pseudo_hdr[11] = (unsigned char)( ( ssl->in_msglen >> 8 ) & 0xFF );
marcozecchini	0:9fca2b23d0ba	1745	pseudo_hdr[12] = (unsigned char)( ( ssl->in_msglen ) & 0xFF );
marcozecchini	0:9fca2b23d0ba	1746
marcozecchini	0:9fca2b23d0ba	1747	MBEDTLS_SSL_DEBUG_BUF( 4, "MAC'd meta-data", pseudo_hdr, 13 );
marcozecchini	0:9fca2b23d0ba	1748
marcozecchini	0:9fca2b23d0ba	1749	mbedtls_md_hmac_update( &ssl->transform_in->md_ctx_dec, pseudo_hdr, 13 );
marcozecchini	0:9fca2b23d0ba	1750	mbedtls_md_hmac_update( &ssl->transform_in->md_ctx_dec,
marcozecchini	0:9fca2b23d0ba	1751	ssl->in_iv, ssl->in_msglen );
marcozecchini	0:9fca2b23d0ba	1752	mbedtls_md_hmac_finish( &ssl->transform_in->md_ctx_dec, computed_mac );
marcozecchini	0:9fca2b23d0ba	1753	mbedtls_md_hmac_reset( &ssl->transform_in->md_ctx_dec );
marcozecchini	0:9fca2b23d0ba	1754
marcozecchini	0:9fca2b23d0ba	1755	MBEDTLS_SSL_DEBUG_BUF( 4, "message mac", ssl->in_iv + ssl->in_msglen,
marcozecchini	0:9fca2b23d0ba	1756	ssl->transform_in->maclen );
marcozecchini	0:9fca2b23d0ba	1757	MBEDTLS_SSL_DEBUG_BUF( 4, "computed mac", computed_mac,
marcozecchini	0:9fca2b23d0ba	1758	ssl->transform_in->maclen );
marcozecchini	0:9fca2b23d0ba	1759
marcozecchini	0:9fca2b23d0ba	1760	if( mbedtls_ssl_safer_memcmp( ssl->in_iv + ssl->in_msglen, computed_mac,
marcozecchini	0:9fca2b23d0ba	1761	ssl->transform_in->maclen ) != 0 )
marcozecchini	0:9fca2b23d0ba	1762	{
marcozecchini	0:9fca2b23d0ba	1763	MBEDTLS_SSL_DEBUG_MSG( 1, ( "message mac does not match" ) );
marcozecchini	0:9fca2b23d0ba	1764
marcozecchini	0:9fca2b23d0ba	1765	return( MBEDTLS_ERR_SSL_INVALID_MAC );
marcozecchini	0:9fca2b23d0ba	1766	}
marcozecchini	0:9fca2b23d0ba	1767	auth_done++;
marcozecchini	0:9fca2b23d0ba	1768	}
marcozecchini	0:9fca2b23d0ba	1769	#endif /* MBEDTLS_SSL_ENCRYPT_THEN_MAC */
marcozecchini	0:9fca2b23d0ba	1770
marcozecchini	0:9fca2b23d0ba	1771	/*
marcozecchini	0:9fca2b23d0ba	1772	* Check length sanity
marcozecchini	0:9fca2b23d0ba	1773	*/
marcozecchini	0:9fca2b23d0ba	1774	if( ssl->in_msglen % ssl->transform_in->ivlen != 0 )
marcozecchini	0:9fca2b23d0ba	1775	{
marcozecchini	0:9fca2b23d0ba	1776	MBEDTLS_SSL_DEBUG_MSG( 1, ( "msglen (%d) %% ivlen (%d) != 0",
marcozecchini	0:9fca2b23d0ba	1777	ssl->in_msglen, ssl->transform_in->ivlen ) );
marcozecchini	0:9fca2b23d0ba	1778	return( MBEDTLS_ERR_SSL_INVALID_MAC );
marcozecchini	0:9fca2b23d0ba	1779	}
marcozecchini	0:9fca2b23d0ba	1780
marcozecchini	0:9fca2b23d0ba	1781	#if defined(MBEDTLS_SSL_PROTO_TLS1_1) \|\| defined(MBEDTLS_SSL_PROTO_TLS1_2)
marcozecchini	0:9fca2b23d0ba	1782	/*
marcozecchini	0:9fca2b23d0ba	1783	* Initialize for prepended IV for block cipher in TLS v1.1 and up
marcozecchini	0:9fca2b23d0ba	1784	*/
marcozecchini	0:9fca2b23d0ba	1785	if( ssl->minor_ver >= MBEDTLS_SSL_MINOR_VERSION_2 )
marcozecchini	0:9fca2b23d0ba	1786	{
marcozecchini	0:9fca2b23d0ba	1787	dec_msglen -= ssl->transform_in->ivlen;
marcozecchini	0:9fca2b23d0ba	1788	ssl->in_msglen -= ssl->transform_in->ivlen;
marcozecchini	0:9fca2b23d0ba	1789
marcozecchini	0:9fca2b23d0ba	1790	for( i = 0; i < ssl->transform_in->ivlen; i++ )
marcozecchini	0:9fca2b23d0ba	1791	ssl->transform_in->iv_dec[i] = ssl->in_iv[i];
marcozecchini	0:9fca2b23d0ba	1792	}
marcozecchini	0:9fca2b23d0ba	1793	#endif /* MBEDTLS_SSL_PROTO_TLS1_1 \|\| MBEDTLS_SSL_PROTO_TLS1_2 */
marcozecchini	0:9fca2b23d0ba	1794
marcozecchini	0:9fca2b23d0ba	1795	if( ( ret = mbedtls_cipher_crypt( &ssl->transform_in->cipher_ctx_dec,
marcozecchini	0:9fca2b23d0ba	1796	ssl->transform_in->iv_dec,
marcozecchini	0:9fca2b23d0ba	1797	ssl->transform_in->ivlen,
marcozecchini	0:9fca2b23d0ba	1798	dec_msg, dec_msglen,
marcozecchini	0:9fca2b23d0ba	1799	dec_msg_result, &olen ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	1800	{
marcozecchini	0:9fca2b23d0ba	1801	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_cipher_crypt", ret );
marcozecchini	0:9fca2b23d0ba	1802	return( ret );
marcozecchini	0:9fca2b23d0ba	1803	}
marcozecchini	0:9fca2b23d0ba	1804
marcozecchini	0:9fca2b23d0ba	1805	if( dec_msglen != olen )
marcozecchini	0:9fca2b23d0ba	1806	{
marcozecchini	0:9fca2b23d0ba	1807	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
marcozecchini	0:9fca2b23d0ba	1808	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
marcozecchini	0:9fca2b23d0ba	1809	}
marcozecchini	0:9fca2b23d0ba	1810
marcozecchini	0:9fca2b23d0ba	1811	#if defined(MBEDTLS_SSL_PROTO_SSL3) \|\| defined(MBEDTLS_SSL_PROTO_TLS1)
marcozecchini	0:9fca2b23d0ba	1812	if( ssl->minor_ver < MBEDTLS_SSL_MINOR_VERSION_2 )
marcozecchini	0:9fca2b23d0ba	1813	{
marcozecchini	0:9fca2b23d0ba	1814	/*
marcozecchini	0:9fca2b23d0ba	1815	* Save IV in SSL3 and TLS1
marcozecchini	0:9fca2b23d0ba	1816	*/
marcozecchini	0:9fca2b23d0ba	1817	memcpy( ssl->transform_in->iv_dec,
marcozecchini	0:9fca2b23d0ba	1818	ssl->transform_in->cipher_ctx_dec.iv,
marcozecchini	0:9fca2b23d0ba	1819	ssl->transform_in->ivlen );
marcozecchini	0:9fca2b23d0ba	1820	}
marcozecchini	0:9fca2b23d0ba	1821	#endif
marcozecchini	0:9fca2b23d0ba	1822
marcozecchini	0:9fca2b23d0ba	1823	padlen = 1 + ssl->in_msg[ssl->in_msglen - 1];
marcozecchini	0:9fca2b23d0ba	1824
marcozecchini	0:9fca2b23d0ba	1825	if( ssl->in_msglen < ssl->transform_in->maclen + padlen &&
marcozecchini	0:9fca2b23d0ba	1826	auth_done == 0 )
marcozecchini	0:9fca2b23d0ba	1827	{
marcozecchini	0:9fca2b23d0ba	1828	#if defined(MBEDTLS_SSL_DEBUG_ALL)
marcozecchini	0:9fca2b23d0ba	1829	MBEDTLS_SSL_DEBUG_MSG( 1, ( "msglen (%d) < maclen (%d) + padlen (%d)",
marcozecchini	0:9fca2b23d0ba	1830	ssl->in_msglen, ssl->transform_in->maclen, padlen ) );
marcozecchini	0:9fca2b23d0ba	1831	#endif
marcozecchini	0:9fca2b23d0ba	1832	padlen = 0;
marcozecchini	0:9fca2b23d0ba	1833	correct = 0;
marcozecchini	0:9fca2b23d0ba	1834	}
marcozecchini	0:9fca2b23d0ba	1835
marcozecchini	0:9fca2b23d0ba	1836	#if defined(MBEDTLS_SSL_PROTO_SSL3)
marcozecchini	0:9fca2b23d0ba	1837	if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 )
marcozecchini	0:9fca2b23d0ba	1838	{
marcozecchini	0:9fca2b23d0ba	1839	if( padlen > ssl->transform_in->ivlen )
marcozecchini	0:9fca2b23d0ba	1840	{
marcozecchini	0:9fca2b23d0ba	1841	#if defined(MBEDTLS_SSL_DEBUG_ALL)
marcozecchini	0:9fca2b23d0ba	1842	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad padding length: is %d, "
marcozecchini	0:9fca2b23d0ba	1843	"should be no more than %d",
marcozecchini	0:9fca2b23d0ba	1844	padlen, ssl->transform_in->ivlen ) );
marcozecchini	0:9fca2b23d0ba	1845	#endif
marcozecchini	0:9fca2b23d0ba	1846	correct = 0;
marcozecchini	0:9fca2b23d0ba	1847	}
marcozecchini	0:9fca2b23d0ba	1848	}
marcozecchini	0:9fca2b23d0ba	1849	else
marcozecchini	0:9fca2b23d0ba	1850	#endif /* MBEDTLS_SSL_PROTO_SSL3 */
marcozecchini	0:9fca2b23d0ba	1851	#if defined(MBEDTLS_SSL_PROTO_TLS1) \|\| defined(MBEDTLS_SSL_PROTO_TLS1_1) \|\| \
marcozecchini	0:9fca2b23d0ba	1852	defined(MBEDTLS_SSL_PROTO_TLS1_2)
marcozecchini	0:9fca2b23d0ba	1853	if( ssl->minor_ver > MBEDTLS_SSL_MINOR_VERSION_0 )
marcozecchini	0:9fca2b23d0ba	1854	{
marcozecchini	0:9fca2b23d0ba	1855	/*
marcozecchini	0:9fca2b23d0ba	1856	* TLSv1+: always check the padding up to the first failure
marcozecchini	0:9fca2b23d0ba	1857	* and fake check up to 256 bytes of padding
marcozecchini	0:9fca2b23d0ba	1858	*/
marcozecchini	0:9fca2b23d0ba	1859	size_t pad_count = 0, real_count = 1;
marcozecchini	0:9fca2b23d0ba	1860	size_t padding_idx = ssl->in_msglen - padlen - 1;
marcozecchini	0:9fca2b23d0ba	1861
marcozecchini	0:9fca2b23d0ba	1862	/*
marcozecchini	0:9fca2b23d0ba	1863	* Padding is guaranteed to be incorrect if:
marcozecchini	0:9fca2b23d0ba	1864	* 1. padlen >= ssl->in_msglen
marcozecchini	0:9fca2b23d0ba	1865	*
marcozecchini	0:9fca2b23d0ba	1866	* 2. padding_idx >= MBEDTLS_SSL_MAX_CONTENT_LEN +
marcozecchini	0:9fca2b23d0ba	1867	* ssl->transform_in->maclen
marcozecchini	0:9fca2b23d0ba	1868	*
marcozecchini	0:9fca2b23d0ba	1869	* In both cases we reset padding_idx to a safe value (0) to
marcozecchini	0:9fca2b23d0ba	1870	* prevent out-of-buffer reads.
marcozecchini	0:9fca2b23d0ba	1871	*/
marcozecchini	0:9fca2b23d0ba	1872	correct &= ( ssl->in_msglen >= padlen + 1 );
marcozecchini	0:9fca2b23d0ba	1873	correct &= ( padding_idx < MBEDTLS_SSL_MAX_CONTENT_LEN +
marcozecchini	0:9fca2b23d0ba	1874	ssl->transform_in->maclen );
marcozecchini	0:9fca2b23d0ba	1875
marcozecchini	0:9fca2b23d0ba	1876	padding_idx *= correct;
marcozecchini	0:9fca2b23d0ba	1877
marcozecchini	0:9fca2b23d0ba	1878	for( i = 1; i <= 256; i++ )
marcozecchini	0:9fca2b23d0ba	1879	{
marcozecchini	0:9fca2b23d0ba	1880	real_count &= ( i <= padlen );
marcozecchini	0:9fca2b23d0ba	1881	pad_count += real_count *
marcozecchini	0:9fca2b23d0ba	1882	( ssl->in_msg[padding_idx + i] == padlen - 1 );
marcozecchini	0:9fca2b23d0ba	1883	}
marcozecchini	0:9fca2b23d0ba	1884
marcozecchini	0:9fca2b23d0ba	1885	correct &= ( pad_count == padlen ); /* Only 1 on correct padding */
marcozecchini	0:9fca2b23d0ba	1886
marcozecchini	0:9fca2b23d0ba	1887	#if defined(MBEDTLS_SSL_DEBUG_ALL)
marcozecchini	0:9fca2b23d0ba	1888	if( padlen > 0 && correct == 0 )
marcozecchini	0:9fca2b23d0ba	1889	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad padding byte detected" ) );
marcozecchini	0:9fca2b23d0ba	1890	#endif
marcozecchini	0:9fca2b23d0ba	1891	padlen &= correct * 0x1FF;
marcozecchini	0:9fca2b23d0ba	1892	}
marcozecchini	0:9fca2b23d0ba	1893	else
marcozecchini	0:9fca2b23d0ba	1894	#endif /* MBEDTLS_SSL_PROTO_TLS1 \|\| MBEDTLS_SSL_PROTO_TLS1_1 \|\| \
marcozecchini	0:9fca2b23d0ba	1895	MBEDTLS_SSL_PROTO_TLS1_2 */
marcozecchini	0:9fca2b23d0ba	1896	{
marcozecchini	0:9fca2b23d0ba	1897	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
marcozecchini	0:9fca2b23d0ba	1898	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
marcozecchini	0:9fca2b23d0ba	1899	}
marcozecchini	0:9fca2b23d0ba	1900
marcozecchini	0:9fca2b23d0ba	1901	ssl->in_msglen -= padlen;
marcozecchini	0:9fca2b23d0ba	1902	}
marcozecchini	0:9fca2b23d0ba	1903	else
marcozecchini	0:9fca2b23d0ba	1904	#endif /* MBEDTLS_CIPHER_MODE_CBC &&
marcozecchini	0:9fca2b23d0ba	1905	( MBEDTLS_AES_C \|\| MBEDTLS_CAMELLIA_C ) */
marcozecchini	0:9fca2b23d0ba	1906	{
marcozecchini	0:9fca2b23d0ba	1907	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
marcozecchini	0:9fca2b23d0ba	1908	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
marcozecchini	0:9fca2b23d0ba	1909	}
marcozecchini	0:9fca2b23d0ba	1910
marcozecchini	0:9fca2b23d0ba	1911	MBEDTLS_SSL_DEBUG_BUF( 4, "raw buffer after decryption",
marcozecchini	0:9fca2b23d0ba	1912	ssl->in_msg, ssl->in_msglen );
marcozecchini	0:9fca2b23d0ba	1913
marcozecchini	0:9fca2b23d0ba	1914	/*
marcozecchini	0:9fca2b23d0ba	1915	* Authenticate if not done yet.
marcozecchini	0:9fca2b23d0ba	1916	* Compute the MAC regardless of the padding result (RFC4346, CBCTIME).
marcozecchini	0:9fca2b23d0ba	1917	*/
marcozecchini	0:9fca2b23d0ba	1918	#if defined(SSL_SOME_MODES_USE_MAC)
marcozecchini	0:9fca2b23d0ba	1919	if( auth_done == 0 )
marcozecchini	0:9fca2b23d0ba	1920	{
marcozecchini	0:9fca2b23d0ba	1921	unsigned char tmp[SSL_MAX_MAC_SIZE];
marcozecchini	0:9fca2b23d0ba	1922
marcozecchini	0:9fca2b23d0ba	1923	ssl->in_msglen -= ssl->transform_in->maclen;
marcozecchini	0:9fca2b23d0ba	1924
marcozecchini	0:9fca2b23d0ba	1925	ssl->in_len[0] = (unsigned char)( ssl->in_msglen >> 8 );
marcozecchini	0:9fca2b23d0ba	1926	ssl->in_len[1] = (unsigned char)( ssl->in_msglen );
marcozecchini	0:9fca2b23d0ba	1927
marcozecchini	0:9fca2b23d0ba	1928	memcpy( tmp, ssl->in_msg + ssl->in_msglen, ssl->transform_in->maclen );
marcozecchini	0:9fca2b23d0ba	1929
marcozecchini	0:9fca2b23d0ba	1930	#if defined(MBEDTLS_SSL_PROTO_SSL3)
marcozecchini	0:9fca2b23d0ba	1931	if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 )
marcozecchini	0:9fca2b23d0ba	1932	{
marcozecchini	0:9fca2b23d0ba	1933	ssl_mac( &ssl->transform_in->md_ctx_dec,
marcozecchini	0:9fca2b23d0ba	1934	ssl->transform_in->mac_dec,
marcozecchini	0:9fca2b23d0ba	1935	ssl->in_msg, ssl->in_msglen,
marcozecchini	0:9fca2b23d0ba	1936	ssl->in_ctr, ssl->in_msgtype );
marcozecchini	0:9fca2b23d0ba	1937	}
marcozecchini	0:9fca2b23d0ba	1938	else
marcozecchini	0:9fca2b23d0ba	1939	#endif /* MBEDTLS_SSL_PROTO_SSL3 */
marcozecchini	0:9fca2b23d0ba	1940	#if defined(MBEDTLS_SSL_PROTO_TLS1) \|\| defined(MBEDTLS_SSL_PROTO_TLS1_1) \|\| \
marcozecchini	0:9fca2b23d0ba	1941	defined(MBEDTLS_SSL_PROTO_TLS1_2)
marcozecchini	0:9fca2b23d0ba	1942	if( ssl->minor_ver > MBEDTLS_SSL_MINOR_VERSION_0 )
marcozecchini	0:9fca2b23d0ba	1943	{
marcozecchini	0:9fca2b23d0ba	1944	/*
marcozecchini	0:9fca2b23d0ba	1945	* Process MAC and always update for padlen afterwards to make
marcozecchini	0:9fca2b23d0ba	1946	* total time independent of padlen
marcozecchini	0:9fca2b23d0ba	1947	*
marcozecchini	0:9fca2b23d0ba	1948	* extra_run compensates MAC check for padlen
marcozecchini	0:9fca2b23d0ba	1949	*
marcozecchini	0:9fca2b23d0ba	1950	* Known timing attacks:
marcozecchini	0:9fca2b23d0ba	1951	* - Lucky Thirteen (http://www.isg.rhul.ac.uk/tls/TLStiming.pdf)
marcozecchini	0:9fca2b23d0ba	1952	*
marcozecchini	0:9fca2b23d0ba	1953	* We use ( ( Lx + 8 ) / 64 ) to handle 'negative Lx' values
marcozecchini	0:9fca2b23d0ba	1954	* correctly. (We round down instead of up, so -56 is the correct
marcozecchini	0:9fca2b23d0ba	1955	* value for our calculations instead of -55)
marcozecchini	0:9fca2b23d0ba	1956	*/
marcozecchini	0:9fca2b23d0ba	1957	size_t j, extra_run = 0;
marcozecchini	0:9fca2b23d0ba	1958	extra_run = ( 13 + ssl->in_msglen + padlen + 8 ) / 64 -
marcozecchini	0:9fca2b23d0ba	1959	( 13 + ssl->in_msglen + 8 ) / 64;
marcozecchini	0:9fca2b23d0ba	1960
marcozecchini	0:9fca2b23d0ba	1961	extra_run &= correct * 0xFF;
marcozecchini	0:9fca2b23d0ba	1962
marcozecchini	0:9fca2b23d0ba	1963	mbedtls_md_hmac_update( &ssl->transform_in->md_ctx_dec, ssl->in_ctr, 8 );
marcozecchini	0:9fca2b23d0ba	1964	mbedtls_md_hmac_update( &ssl->transform_in->md_ctx_dec, ssl->in_hdr, 3 );
marcozecchini	0:9fca2b23d0ba	1965	mbedtls_md_hmac_update( &ssl->transform_in->md_ctx_dec, ssl->in_len, 2 );
marcozecchini	0:9fca2b23d0ba	1966	mbedtls_md_hmac_update( &ssl->transform_in->md_ctx_dec, ssl->in_msg,
marcozecchini	0:9fca2b23d0ba	1967	ssl->in_msglen );
marcozecchini	0:9fca2b23d0ba	1968	mbedtls_md_hmac_finish( &ssl->transform_in->md_ctx_dec,
marcozecchini	0:9fca2b23d0ba	1969	ssl->in_msg + ssl->in_msglen );
marcozecchini	0:9fca2b23d0ba	1970	/* Call mbedtls_md_process at least once due to cache attacks */
marcozecchini	0:9fca2b23d0ba	1971	for( j = 0; j < extra_run + 1; j++ )
marcozecchini	0:9fca2b23d0ba	1972	mbedtls_md_process( &ssl->transform_in->md_ctx_dec, ssl->in_msg );
marcozecchini	0:9fca2b23d0ba	1973
marcozecchini	0:9fca2b23d0ba	1974	mbedtls_md_hmac_reset( &ssl->transform_in->md_ctx_dec );
marcozecchini	0:9fca2b23d0ba	1975	}
marcozecchini	0:9fca2b23d0ba	1976	else
marcozecchini	0:9fca2b23d0ba	1977	#endif /* MBEDTLS_SSL_PROTO_TLS1 \|\| MBEDTLS_SSL_PROTO_TLS1_1 \|\| \
marcozecchini	0:9fca2b23d0ba	1978	MBEDTLS_SSL_PROTO_TLS1_2 */
marcozecchini	0:9fca2b23d0ba	1979	{
marcozecchini	0:9fca2b23d0ba	1980	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
marcozecchini	0:9fca2b23d0ba	1981	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
marcozecchini	0:9fca2b23d0ba	1982	}
marcozecchini	0:9fca2b23d0ba	1983
marcozecchini	0:9fca2b23d0ba	1984	MBEDTLS_SSL_DEBUG_BUF( 4, "message mac", tmp, ssl->transform_in->maclen );
marcozecchini	0:9fca2b23d0ba	1985	MBEDTLS_SSL_DEBUG_BUF( 4, "computed mac", ssl->in_msg + ssl->in_msglen,
marcozecchini	0:9fca2b23d0ba	1986	ssl->transform_in->maclen );
marcozecchini	0:9fca2b23d0ba	1987
marcozecchini	0:9fca2b23d0ba	1988	if( mbedtls_ssl_safer_memcmp( tmp, ssl->in_msg + ssl->in_msglen,
marcozecchini	0:9fca2b23d0ba	1989	ssl->transform_in->maclen ) != 0 )
marcozecchini	0:9fca2b23d0ba	1990	{
marcozecchini	0:9fca2b23d0ba	1991	#if defined(MBEDTLS_SSL_DEBUG_ALL)
marcozecchini	0:9fca2b23d0ba	1992	MBEDTLS_SSL_DEBUG_MSG( 1, ( "message mac does not match" ) );
marcozecchini	0:9fca2b23d0ba	1993	#endif
marcozecchini	0:9fca2b23d0ba	1994	correct = 0;
marcozecchini	0:9fca2b23d0ba	1995	}
marcozecchini	0:9fca2b23d0ba	1996	auth_done++;
marcozecchini	0:9fca2b23d0ba	1997
marcozecchini	0:9fca2b23d0ba	1998	/*
marcozecchini	0:9fca2b23d0ba	1999	* Finally check the correct flag
marcozecchini	0:9fca2b23d0ba	2000	*/
marcozecchini	0:9fca2b23d0ba	2001	if( correct == 0 )
marcozecchini	0:9fca2b23d0ba	2002	return( MBEDTLS_ERR_SSL_INVALID_MAC );
marcozecchini	0:9fca2b23d0ba	2003	}
marcozecchini	0:9fca2b23d0ba	2004	#endif /* SSL_SOME_MODES_USE_MAC */
marcozecchini	0:9fca2b23d0ba	2005
marcozecchini	0:9fca2b23d0ba	2006	/* Make extra sure authentication was performed, exactly once */
marcozecchini	0:9fca2b23d0ba	2007	if( auth_done != 1 )
marcozecchini	0:9fca2b23d0ba	2008	{
marcozecchini	0:9fca2b23d0ba	2009	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
marcozecchini	0:9fca2b23d0ba	2010	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
marcozecchini	0:9fca2b23d0ba	2011	}
marcozecchini	0:9fca2b23d0ba	2012
marcozecchini	0:9fca2b23d0ba	2013	if( ssl->in_msglen == 0 )
marcozecchini	0:9fca2b23d0ba	2014	{
marcozecchini	0:9fca2b23d0ba	2015	ssl->nb_zero++;
marcozecchini	0:9fca2b23d0ba	2016
marcozecchini	0:9fca2b23d0ba	2017	/*
marcozecchini	0:9fca2b23d0ba	2018	* Three or more empty messages may be a DoS attack
marcozecchini	0:9fca2b23d0ba	2019	* (excessive CPU consumption).
marcozecchini	0:9fca2b23d0ba	2020	*/
marcozecchini	0:9fca2b23d0ba	2021	if( ssl->nb_zero > 3 )
marcozecchini	0:9fca2b23d0ba	2022	{
marcozecchini	0:9fca2b23d0ba	2023	MBEDTLS_SSL_DEBUG_MSG( 1, ( "received four consecutive empty "
marcozecchini	0:9fca2b23d0ba	2024	"messages, possible DoS attack" ) );
marcozecchini	0:9fca2b23d0ba	2025	return( MBEDTLS_ERR_SSL_INVALID_MAC );
marcozecchini	0:9fca2b23d0ba	2026	}
marcozecchini	0:9fca2b23d0ba	2027	}
marcozecchini	0:9fca2b23d0ba	2028	else
marcozecchini	0:9fca2b23d0ba	2029	ssl->nb_zero = 0;
marcozecchini	0:9fca2b23d0ba	2030
marcozecchini	0:9fca2b23d0ba	2031	#if defined(MBEDTLS_SSL_PROTO_DTLS)
marcozecchini	0:9fca2b23d0ba	2032	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
marcozecchini	0:9fca2b23d0ba	2033	{
marcozecchini	0:9fca2b23d0ba	2034	; /* in_ctr read from peer, not maintained internally */
marcozecchini	0:9fca2b23d0ba	2035	}
marcozecchini	0:9fca2b23d0ba	2036	else
marcozecchini	0:9fca2b23d0ba	2037	#endif
marcozecchini	0:9fca2b23d0ba	2038	{
marcozecchini	0:9fca2b23d0ba	2039	for( i = 8; i > ssl_ep_len( ssl ); i-- )
marcozecchini	0:9fca2b23d0ba	2040	if( ++ssl->in_ctr[i - 1] != 0 )
marcozecchini	0:9fca2b23d0ba	2041	break;
marcozecchini	0:9fca2b23d0ba	2042
marcozecchini	0:9fca2b23d0ba	2043	/* The loop goes to its end iff the counter is wrapping */
marcozecchini	0:9fca2b23d0ba	2044	if( i == ssl_ep_len( ssl ) )
marcozecchini	0:9fca2b23d0ba	2045	{
marcozecchini	0:9fca2b23d0ba	2046	MBEDTLS_SSL_DEBUG_MSG( 1, ( "incoming message counter would wrap" ) );
marcozecchini	0:9fca2b23d0ba	2047	return( MBEDTLS_ERR_SSL_COUNTER_WRAPPING );
marcozecchini	0:9fca2b23d0ba	2048	}
marcozecchini	0:9fca2b23d0ba	2049	}
marcozecchini	0:9fca2b23d0ba	2050
marcozecchini	0:9fca2b23d0ba	2051	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= decrypt buf" ) );
marcozecchini	0:9fca2b23d0ba	2052
marcozecchini	0:9fca2b23d0ba	2053	return( 0 );
marcozecchini	0:9fca2b23d0ba	2054	}
marcozecchini	0:9fca2b23d0ba	2055
marcozecchini	0:9fca2b23d0ba	2056	#undef MAC_NONE
marcozecchini	0:9fca2b23d0ba	2057	#undef MAC_PLAINTEXT
marcozecchini	0:9fca2b23d0ba	2058	#undef MAC_CIPHERTEXT
marcozecchini	0:9fca2b23d0ba	2059
marcozecchini	0:9fca2b23d0ba	2060	#if defined(MBEDTLS_ZLIB_SUPPORT)
marcozecchini	0:9fca2b23d0ba	2061	/*
marcozecchini	0:9fca2b23d0ba	2062	* Compression/decompression functions
marcozecchini	0:9fca2b23d0ba	2063	*/
marcozecchini	0:9fca2b23d0ba	2064	static int ssl_compress_buf( mbedtls_ssl_context *ssl )
marcozecchini	0:9fca2b23d0ba	2065	{
marcozecchini	0:9fca2b23d0ba	2066	int ret;
marcozecchini	0:9fca2b23d0ba	2067	unsigned char *msg_post = ssl->out_msg;
marcozecchini	0:9fca2b23d0ba	2068	size_t len_pre = ssl->out_msglen;
marcozecchini	0:9fca2b23d0ba	2069	unsigned char *msg_pre = ssl->compress_buf;
marcozecchini	0:9fca2b23d0ba	2070
marcozecchini	0:9fca2b23d0ba	2071	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> compress buf" ) );
marcozecchini	0:9fca2b23d0ba	2072
marcozecchini	0:9fca2b23d0ba	2073	if( len_pre == 0 )
marcozecchini	0:9fca2b23d0ba	2074	return( 0 );
marcozecchini	0:9fca2b23d0ba	2075
marcozecchini	0:9fca2b23d0ba	2076	memcpy( msg_pre, ssl->out_msg, len_pre );
marcozecchini	0:9fca2b23d0ba	2077
marcozecchini	0:9fca2b23d0ba	2078	MBEDTLS_SSL_DEBUG_MSG( 3, ( "before compression: msglen = %d, ",
marcozecchini	0:9fca2b23d0ba	2079	ssl->out_msglen ) );
marcozecchini	0:9fca2b23d0ba	2080
marcozecchini	0:9fca2b23d0ba	2081	MBEDTLS_SSL_DEBUG_BUF( 4, "before compression: output payload",
marcozecchini	0:9fca2b23d0ba	2082	ssl->out_msg, ssl->out_msglen );
marcozecchini	0:9fca2b23d0ba	2083
marcozecchini	0:9fca2b23d0ba	2084	ssl->transform_out->ctx_deflate.next_in = msg_pre;
marcozecchini	0:9fca2b23d0ba	2085	ssl->transform_out->ctx_deflate.avail_in = len_pre;
marcozecchini	0:9fca2b23d0ba	2086	ssl->transform_out->ctx_deflate.next_out = msg_post;
marcozecchini	0:9fca2b23d0ba	2087	ssl->transform_out->ctx_deflate.avail_out = MBEDTLS_SSL_BUFFER_LEN;
marcozecchini	0:9fca2b23d0ba	2088
marcozecchini	0:9fca2b23d0ba	2089	ret = deflate( &ssl->transform_out->ctx_deflate, Z_SYNC_FLUSH );
marcozecchini	0:9fca2b23d0ba	2090	if( ret != Z_OK )
marcozecchini	0:9fca2b23d0ba	2091	{
marcozecchini	0:9fca2b23d0ba	2092	MBEDTLS_SSL_DEBUG_MSG( 1, ( "failed to perform compression (%d)", ret ) );
marcozecchini	0:9fca2b23d0ba	2093	return( MBEDTLS_ERR_SSL_COMPRESSION_FAILED );
marcozecchini	0:9fca2b23d0ba	2094	}
marcozecchini	0:9fca2b23d0ba	2095
marcozecchini	0:9fca2b23d0ba	2096	ssl->out_msglen = MBEDTLS_SSL_BUFFER_LEN -
marcozecchini	0:9fca2b23d0ba	2097	ssl->transform_out->ctx_deflate.avail_out;
marcozecchini	0:9fca2b23d0ba	2098
marcozecchini	0:9fca2b23d0ba	2099	MBEDTLS_SSL_DEBUG_MSG( 3, ( "after compression: msglen = %d, ",
marcozecchini	0:9fca2b23d0ba	2100	ssl->out_msglen ) );
marcozecchini	0:9fca2b23d0ba	2101
marcozecchini	0:9fca2b23d0ba	2102	MBEDTLS_SSL_DEBUG_BUF( 4, "after compression: output payload",
marcozecchini	0:9fca2b23d0ba	2103	ssl->out_msg, ssl->out_msglen );
marcozecchini	0:9fca2b23d0ba	2104
marcozecchini	0:9fca2b23d0ba	2105	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= compress buf" ) );
marcozecchini	0:9fca2b23d0ba	2106
marcozecchini	0:9fca2b23d0ba	2107	return( 0 );
marcozecchini	0:9fca2b23d0ba	2108	}
marcozecchini	0:9fca2b23d0ba	2109
marcozecchini	0:9fca2b23d0ba	2110	static int ssl_decompress_buf( mbedtls_ssl_context *ssl )
marcozecchini	0:9fca2b23d0ba	2111	{
marcozecchini	0:9fca2b23d0ba	2112	int ret;
marcozecchini	0:9fca2b23d0ba	2113	unsigned char *msg_post = ssl->in_msg;
marcozecchini	0:9fca2b23d0ba	2114	size_t len_pre = ssl->in_msglen;
marcozecchini	0:9fca2b23d0ba	2115	unsigned char *msg_pre = ssl->compress_buf;
marcozecchini	0:9fca2b23d0ba	2116
marcozecchini	0:9fca2b23d0ba	2117	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> decompress buf" ) );
marcozecchini	0:9fca2b23d0ba	2118
marcozecchini	0:9fca2b23d0ba	2119	if( len_pre == 0 )
marcozecchini	0:9fca2b23d0ba	2120	return( 0 );
marcozecchini	0:9fca2b23d0ba	2121
marcozecchini	0:9fca2b23d0ba	2122	memcpy( msg_pre, ssl->in_msg, len_pre );
marcozecchini	0:9fca2b23d0ba	2123
marcozecchini	0:9fca2b23d0ba	2124	MBEDTLS_SSL_DEBUG_MSG( 3, ( "before decompression: msglen = %d, ",
marcozecchini	0:9fca2b23d0ba	2125	ssl->in_msglen ) );
marcozecchini	0:9fca2b23d0ba	2126
marcozecchini	0:9fca2b23d0ba	2127	MBEDTLS_SSL_DEBUG_BUF( 4, "before decompression: input payload",
marcozecchini	0:9fca2b23d0ba	2128	ssl->in_msg, ssl->in_msglen );
marcozecchini	0:9fca2b23d0ba	2129
marcozecchini	0:9fca2b23d0ba	2130	ssl->transform_in->ctx_inflate.next_in = msg_pre;
marcozecchini	0:9fca2b23d0ba	2131	ssl->transform_in->ctx_inflate.avail_in = len_pre;
marcozecchini	0:9fca2b23d0ba	2132	ssl->transform_in->ctx_inflate.next_out = msg_post;
marcozecchini	0:9fca2b23d0ba	2133	ssl->transform_in->ctx_inflate.avail_out = MBEDTLS_SSL_MAX_CONTENT_LEN;
marcozecchini	0:9fca2b23d0ba	2134
marcozecchini	0:9fca2b23d0ba	2135	ret = inflate( &ssl->transform_in->ctx_inflate, Z_SYNC_FLUSH );
marcozecchini	0:9fca2b23d0ba	2136	if( ret != Z_OK )
marcozecchini	0:9fca2b23d0ba	2137	{
marcozecchini	0:9fca2b23d0ba	2138	MBEDTLS_SSL_DEBUG_MSG( 1, ( "failed to perform decompression (%d)", ret ) );
marcozecchini	0:9fca2b23d0ba	2139	return( MBEDTLS_ERR_SSL_COMPRESSION_FAILED );
marcozecchini	0:9fca2b23d0ba	2140	}
marcozecchini	0:9fca2b23d0ba	2141
marcozecchini	0:9fca2b23d0ba	2142	ssl->in_msglen = MBEDTLS_SSL_MAX_CONTENT_LEN -
marcozecchini	0:9fca2b23d0ba	2143	ssl->transform_in->ctx_inflate.avail_out;
marcozecchini	0:9fca2b23d0ba	2144
marcozecchini	0:9fca2b23d0ba	2145	MBEDTLS_SSL_DEBUG_MSG( 3, ( "after decompression: msglen = %d, ",
marcozecchini	0:9fca2b23d0ba	2146	ssl->in_msglen ) );
marcozecchini	0:9fca2b23d0ba	2147
marcozecchini	0:9fca2b23d0ba	2148	MBEDTLS_SSL_DEBUG_BUF( 4, "after decompression: input payload",
marcozecchini	0:9fca2b23d0ba	2149	ssl->in_msg, ssl->in_msglen );
marcozecchini	0:9fca2b23d0ba	2150
marcozecchini	0:9fca2b23d0ba	2151	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= decompress buf" ) );
marcozecchini	0:9fca2b23d0ba	2152
marcozecchini	0:9fca2b23d0ba	2153	return( 0 );
marcozecchini	0:9fca2b23d0ba	2154	}
marcozecchini	0:9fca2b23d0ba	2155	#endif /* MBEDTLS_ZLIB_SUPPORT */
marcozecchini	0:9fca2b23d0ba	2156
marcozecchini	0:9fca2b23d0ba	2157	#if defined(MBEDTLS_SSL_SRV_C) && defined(MBEDTLS_SSL_RENEGOTIATION)
marcozecchini	0:9fca2b23d0ba	2158	static int ssl_write_hello_request( mbedtls_ssl_context *ssl );
marcozecchini	0:9fca2b23d0ba	2159
marcozecchini	0:9fca2b23d0ba	2160	#if defined(MBEDTLS_SSL_PROTO_DTLS)
marcozecchini	0:9fca2b23d0ba	2161	static int ssl_resend_hello_request( mbedtls_ssl_context *ssl )
marcozecchini	0:9fca2b23d0ba	2162	{
marcozecchini	0:9fca2b23d0ba	2163	/* If renegotiation is not enforced, retransmit until we would reach max
marcozecchini	0:9fca2b23d0ba	2164	* timeout if we were using the usual handshake doubling scheme */
marcozecchini	0:9fca2b23d0ba	2165	if( ssl->conf->renego_max_records < 0 )
marcozecchini	0:9fca2b23d0ba	2166	{
marcozecchini	0:9fca2b23d0ba	2167	uint32_t ratio = ssl->conf->hs_timeout_max / ssl->conf->hs_timeout_min + 1;
marcozecchini	0:9fca2b23d0ba	2168	unsigned char doublings = 1;
marcozecchini	0:9fca2b23d0ba	2169
marcozecchini	0:9fca2b23d0ba	2170	while( ratio != 0 )
marcozecchini	0:9fca2b23d0ba	2171	{
marcozecchini	0:9fca2b23d0ba	2172	++doublings;
marcozecchini	0:9fca2b23d0ba	2173	ratio >>= 1;
marcozecchini	0:9fca2b23d0ba	2174	}
marcozecchini	0:9fca2b23d0ba	2175
marcozecchini	0:9fca2b23d0ba	2176	if( ++ssl->renego_records_seen > doublings )
marcozecchini	0:9fca2b23d0ba	2177	{
marcozecchini	0:9fca2b23d0ba	2178	MBEDTLS_SSL_DEBUG_MSG( 2, ( "no longer retransmitting hello request" ) );
marcozecchini	0:9fca2b23d0ba	2179	return( 0 );
marcozecchini	0:9fca2b23d0ba	2180	}
marcozecchini	0:9fca2b23d0ba	2181	}
marcozecchini	0:9fca2b23d0ba	2182
marcozecchini	0:9fca2b23d0ba	2183	return( ssl_write_hello_request( ssl ) );
marcozecchini	0:9fca2b23d0ba	2184	}
marcozecchini	0:9fca2b23d0ba	2185	#endif
marcozecchini	0:9fca2b23d0ba	2186	#endif /* MBEDTLS_SSL_SRV_C && MBEDTLS_SSL_RENEGOTIATION */
marcozecchini	0:9fca2b23d0ba	2187
marcozecchini	0:9fca2b23d0ba	2188	/*
marcozecchini	0:9fca2b23d0ba	2189	* Fill the input message buffer by appending data to it.
marcozecchini	0:9fca2b23d0ba	2190	* The amount of data already fetched is in ssl->in_left.
marcozecchini	0:9fca2b23d0ba	2191	*
marcozecchini	0:9fca2b23d0ba	2192	* If we return 0, is it guaranteed that (at least) nb_want bytes are
marcozecchini	0:9fca2b23d0ba	2193	* available (from this read and/or a previous one). Otherwise, an error code
marcozecchini	0:9fca2b23d0ba	2194	* is returned (possibly EOF or WANT_READ).
marcozecchini	0:9fca2b23d0ba	2195	*
marcozecchini	0:9fca2b23d0ba	2196	* With stream transport (TLS) on success ssl->in_left == nb_want, but
marcozecchini	0:9fca2b23d0ba	2197	* with datagram transport (DTLS) on success ssl->in_left >= nb_want,
marcozecchini	0:9fca2b23d0ba	2198	* since we always read a whole datagram at once.
marcozecchini	0:9fca2b23d0ba	2199	*
marcozecchini	0:9fca2b23d0ba	2200	* For DTLS, it is up to the caller to set ssl->next_record_offset when
marcozecchini	0:9fca2b23d0ba	2201	* they're done reading a record.
marcozecchini	0:9fca2b23d0ba	2202	*/
marcozecchini	0:9fca2b23d0ba	2203	int mbedtls_ssl_fetch_input( mbedtls_ssl_context *ssl, size_t nb_want )
marcozecchini	0:9fca2b23d0ba	2204	{
marcozecchini	0:9fca2b23d0ba	2205	int ret;
marcozecchini	0:9fca2b23d0ba	2206	size_t len;
marcozecchini	0:9fca2b23d0ba	2207
marcozecchini	0:9fca2b23d0ba	2208	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> fetch input" ) );
marcozecchini	0:9fca2b23d0ba	2209
marcozecchini	0:9fca2b23d0ba	2210	if( ssl->f_recv == NULL && ssl->f_recv_timeout == NULL )
marcozecchini	0:9fca2b23d0ba	2211	{
marcozecchini	0:9fca2b23d0ba	2212	MBEDTLS_SSL_DEBUG_MSG( 1, ( "Bad usage of mbedtls_ssl_set_bio() "
marcozecchini	0:9fca2b23d0ba	2213	"or mbedtls_ssl_set_bio()" ) );
marcozecchini	0:9fca2b23d0ba	2214	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
marcozecchini	0:9fca2b23d0ba	2215	}
marcozecchini	0:9fca2b23d0ba	2216
marcozecchini	0:9fca2b23d0ba	2217	if( nb_want > MBEDTLS_SSL_BUFFER_LEN - (size_t)( ssl->in_hdr - ssl->in_buf ) )
marcozecchini	0:9fca2b23d0ba	2218	{
marcozecchini	0:9fca2b23d0ba	2219	MBEDTLS_SSL_DEBUG_MSG( 1, ( "requesting more data than fits" ) );
marcozecchini	0:9fca2b23d0ba	2220	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
marcozecchini	0:9fca2b23d0ba	2221	}
marcozecchini	0:9fca2b23d0ba	2222
marcozecchini	0:9fca2b23d0ba	2223	#if defined(MBEDTLS_SSL_PROTO_DTLS)
marcozecchini	0:9fca2b23d0ba	2224	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
marcozecchini	0:9fca2b23d0ba	2225	{
marcozecchini	0:9fca2b23d0ba	2226	uint32_t timeout;
marcozecchini	0:9fca2b23d0ba	2227
marcozecchini	0:9fca2b23d0ba	2228	/* Just to be sure */
marcozecchini	0:9fca2b23d0ba	2229	if( ssl->f_set_timer == NULL \|\| ssl->f_get_timer == NULL )
marcozecchini	0:9fca2b23d0ba	2230	{
marcozecchini	0:9fca2b23d0ba	2231	MBEDTLS_SSL_DEBUG_MSG( 1, ( "You must use "
marcozecchini	0:9fca2b23d0ba	2232	"mbedtls_ssl_set_timer_cb() for DTLS" ) );
marcozecchini	0:9fca2b23d0ba	2233	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
marcozecchini	0:9fca2b23d0ba	2234	}
marcozecchini	0:9fca2b23d0ba	2235
marcozecchini	0:9fca2b23d0ba	2236	/*
marcozecchini	0:9fca2b23d0ba	2237	* The point is, we need to always read a full datagram at once, so we
marcozecchini	0:9fca2b23d0ba	2238	* sometimes read more then requested, and handle the additional data.
marcozecchini	0:9fca2b23d0ba	2239	* It could be the rest of the current record (while fetching the
marcozecchini	0:9fca2b23d0ba	2240	* header) and/or some other records in the same datagram.
marcozecchini	0:9fca2b23d0ba	2241	*/
marcozecchini	0:9fca2b23d0ba	2242
marcozecchini	0:9fca2b23d0ba	2243	/*
marcozecchini	0:9fca2b23d0ba	2244	* Move to the next record in the already read datagram if applicable
marcozecchini	0:9fca2b23d0ba	2245	*/
marcozecchini	0:9fca2b23d0ba	2246	if( ssl->next_record_offset != 0 )
marcozecchini	0:9fca2b23d0ba	2247	{
marcozecchini	0:9fca2b23d0ba	2248	if( ssl->in_left < ssl->next_record_offset )
marcozecchini	0:9fca2b23d0ba	2249	{
marcozecchini	0:9fca2b23d0ba	2250	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
marcozecchini	0:9fca2b23d0ba	2251	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
marcozecchini	0:9fca2b23d0ba	2252	}
marcozecchini	0:9fca2b23d0ba	2253
marcozecchini	0:9fca2b23d0ba	2254	ssl->in_left -= ssl->next_record_offset;
marcozecchini	0:9fca2b23d0ba	2255
marcozecchini	0:9fca2b23d0ba	2256	if( ssl->in_left != 0 )
marcozecchini	0:9fca2b23d0ba	2257	{
marcozecchini	0:9fca2b23d0ba	2258	MBEDTLS_SSL_DEBUG_MSG( 2, ( "next record in same datagram, offset: %d",
marcozecchini	0:9fca2b23d0ba	2259	ssl->next_record_offset ) );
marcozecchini	0:9fca2b23d0ba	2260	memmove( ssl->in_hdr,
marcozecchini	0:9fca2b23d0ba	2261	ssl->in_hdr + ssl->next_record_offset,
marcozecchini	0:9fca2b23d0ba	2262	ssl->in_left );
marcozecchini	0:9fca2b23d0ba	2263	}
marcozecchini	0:9fca2b23d0ba	2264
marcozecchini	0:9fca2b23d0ba	2265	ssl->next_record_offset = 0;
marcozecchini	0:9fca2b23d0ba	2266	}
marcozecchini	0:9fca2b23d0ba	2267
marcozecchini	0:9fca2b23d0ba	2268	MBEDTLS_SSL_DEBUG_MSG( 2, ( "in_left: %d, nb_want: %d",
marcozecchini	0:9fca2b23d0ba	2269	ssl->in_left, nb_want ) );
marcozecchini	0:9fca2b23d0ba	2270
marcozecchini	0:9fca2b23d0ba	2271	/*
marcozecchini	0:9fca2b23d0ba	2272	* Done if we already have enough data.
marcozecchini	0:9fca2b23d0ba	2273	*/
marcozecchini	0:9fca2b23d0ba	2274	if( nb_want <= ssl->in_left)
marcozecchini	0:9fca2b23d0ba	2275	{
marcozecchini	0:9fca2b23d0ba	2276	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= fetch input" ) );
marcozecchini	0:9fca2b23d0ba	2277	return( 0 );
marcozecchini	0:9fca2b23d0ba	2278	}
marcozecchini	0:9fca2b23d0ba	2279
marcozecchini	0:9fca2b23d0ba	2280	/*
marcozecchini	0:9fca2b23d0ba	2281	* A record can't be split accross datagrams. If we need to read but
marcozecchini	0:9fca2b23d0ba	2282	* are not at the beginning of a new record, the caller did something
marcozecchini	0:9fca2b23d0ba	2283	* wrong.
marcozecchini	0:9fca2b23d0ba	2284	*/
marcozecchini	0:9fca2b23d0ba	2285	if( ssl->in_left != 0 )
marcozecchini	0:9fca2b23d0ba	2286	{
marcozecchini	0:9fca2b23d0ba	2287	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
marcozecchini	0:9fca2b23d0ba	2288	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
marcozecchini	0:9fca2b23d0ba	2289	}
marcozecchini	0:9fca2b23d0ba	2290
marcozecchini	0:9fca2b23d0ba	2291	/*
marcozecchini	0:9fca2b23d0ba	2292	* Don't even try to read if time's out already.
marcozecchini	0:9fca2b23d0ba	2293	* This avoids by-passing the timer when repeatedly receiving messages
marcozecchini	0:9fca2b23d0ba	2294	* that will end up being dropped.
marcozecchini	0:9fca2b23d0ba	2295	*/
marcozecchini	0:9fca2b23d0ba	2296	if( ssl_check_timer( ssl ) != 0 )
marcozecchini	0:9fca2b23d0ba	2297	ret = MBEDTLS_ERR_SSL_TIMEOUT;
marcozecchini	0:9fca2b23d0ba	2298	else
marcozecchini	0:9fca2b23d0ba	2299	{
marcozecchini	0:9fca2b23d0ba	2300	len = MBEDTLS_SSL_BUFFER_LEN - ( ssl->in_hdr - ssl->in_buf );
marcozecchini	0:9fca2b23d0ba	2301
marcozecchini	0:9fca2b23d0ba	2302	if( ssl->state != MBEDTLS_SSL_HANDSHAKE_OVER )
marcozecchini	0:9fca2b23d0ba	2303	timeout = ssl->handshake->retransmit_timeout;
marcozecchini	0:9fca2b23d0ba	2304	else
marcozecchini	0:9fca2b23d0ba	2305	timeout = ssl->conf->read_timeout;
marcozecchini	0:9fca2b23d0ba	2306
marcozecchini	0:9fca2b23d0ba	2307	MBEDTLS_SSL_DEBUG_MSG( 3, ( "f_recv_timeout: %u ms", timeout ) );
marcozecchini	0:9fca2b23d0ba	2308
marcozecchini	0:9fca2b23d0ba	2309	if( ssl->f_recv_timeout != NULL )
marcozecchini	0:9fca2b23d0ba	2310	ret = ssl->f_recv_timeout( ssl->p_bio, ssl->in_hdr, len,
marcozecchini	0:9fca2b23d0ba	2311	timeout );
marcozecchini	0:9fca2b23d0ba	2312	else
marcozecchini	0:9fca2b23d0ba	2313	ret = ssl->f_recv( ssl->p_bio, ssl->in_hdr, len );
marcozecchini	0:9fca2b23d0ba	2314
marcozecchini	0:9fca2b23d0ba	2315	MBEDTLS_SSL_DEBUG_RET( 2, "ssl->f_recv(_timeout)", ret );
marcozecchini	0:9fca2b23d0ba	2316
marcozecchini	0:9fca2b23d0ba	2317	if( ret == 0 )
marcozecchini	0:9fca2b23d0ba	2318	return( MBEDTLS_ERR_SSL_CONN_EOF );
marcozecchini	0:9fca2b23d0ba	2319	}
marcozecchini	0:9fca2b23d0ba	2320
marcozecchini	0:9fca2b23d0ba	2321	if( ret == MBEDTLS_ERR_SSL_TIMEOUT )
marcozecchini	0:9fca2b23d0ba	2322	{
marcozecchini	0:9fca2b23d0ba	2323	MBEDTLS_SSL_DEBUG_MSG( 2, ( "timeout" ) );
marcozecchini	0:9fca2b23d0ba	2324	ssl_set_timer( ssl, 0 );
marcozecchini	0:9fca2b23d0ba	2325
marcozecchini	0:9fca2b23d0ba	2326	if( ssl->state != MBEDTLS_SSL_HANDSHAKE_OVER )
marcozecchini	0:9fca2b23d0ba	2327	{
marcozecchini	0:9fca2b23d0ba	2328	if( ssl_double_retransmit_timeout( ssl ) != 0 )
marcozecchini	0:9fca2b23d0ba	2329	{
marcozecchini	0:9fca2b23d0ba	2330	MBEDTLS_SSL_DEBUG_MSG( 1, ( "handshake timeout" ) );
marcozecchini	0:9fca2b23d0ba	2331	return( MBEDTLS_ERR_SSL_TIMEOUT );
marcozecchini	0:9fca2b23d0ba	2332	}
marcozecchini	0:9fca2b23d0ba	2333
marcozecchini	0:9fca2b23d0ba	2334	if( ( ret = mbedtls_ssl_resend( ssl ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	2335	{
marcozecchini	0:9fca2b23d0ba	2336	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_resend", ret );
marcozecchini	0:9fca2b23d0ba	2337	return( ret );
marcozecchini	0:9fca2b23d0ba	2338	}
marcozecchini	0:9fca2b23d0ba	2339
marcozecchini	0:9fca2b23d0ba	2340	return( MBEDTLS_ERR_SSL_WANT_READ );
marcozecchini	0:9fca2b23d0ba	2341	}
marcozecchini	0:9fca2b23d0ba	2342	#if defined(MBEDTLS_SSL_SRV_C) && defined(MBEDTLS_SSL_RENEGOTIATION)
marcozecchini	0:9fca2b23d0ba	2343	else if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER &&
marcozecchini	0:9fca2b23d0ba	2344	ssl->renego_status == MBEDTLS_SSL_RENEGOTIATION_PENDING )
marcozecchini	0:9fca2b23d0ba	2345	{
marcozecchini	0:9fca2b23d0ba	2346	if( ( ret = ssl_resend_hello_request( ssl ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	2347	{
marcozecchini	0:9fca2b23d0ba	2348	MBEDTLS_SSL_DEBUG_RET( 1, "ssl_resend_hello_request", ret );
marcozecchini	0:9fca2b23d0ba	2349	return( ret );
marcozecchini	0:9fca2b23d0ba	2350	}
marcozecchini	0:9fca2b23d0ba	2351
marcozecchini	0:9fca2b23d0ba	2352	return( MBEDTLS_ERR_SSL_WANT_READ );
marcozecchini	0:9fca2b23d0ba	2353	}
marcozecchini	0:9fca2b23d0ba	2354	#endif /* MBEDTLS_SSL_SRV_C && MBEDTLS_SSL_RENEGOTIATION */
marcozecchini	0:9fca2b23d0ba	2355	}
marcozecchini	0:9fca2b23d0ba	2356
marcozecchini	0:9fca2b23d0ba	2357	if( ret < 0 )
marcozecchini	0:9fca2b23d0ba	2358	return( ret );
marcozecchini	0:9fca2b23d0ba	2359
marcozecchini	0:9fca2b23d0ba	2360	ssl->in_left = ret;
marcozecchini	0:9fca2b23d0ba	2361	}
marcozecchini	0:9fca2b23d0ba	2362	else
marcozecchini	0:9fca2b23d0ba	2363	#endif
marcozecchini	0:9fca2b23d0ba	2364	{
marcozecchini	0:9fca2b23d0ba	2365	MBEDTLS_SSL_DEBUG_MSG( 2, ( "in_left: %d, nb_want: %d",
marcozecchini	0:9fca2b23d0ba	2366	ssl->in_left, nb_want ) );
marcozecchini	0:9fca2b23d0ba	2367
marcozecchini	0:9fca2b23d0ba	2368	while( ssl->in_left < nb_want )
marcozecchini	0:9fca2b23d0ba	2369	{
marcozecchini	0:9fca2b23d0ba	2370	len = nb_want - ssl->in_left;
marcozecchini	0:9fca2b23d0ba	2371
marcozecchini	0:9fca2b23d0ba	2372	if( ssl_check_timer( ssl ) != 0 )
marcozecchini	0:9fca2b23d0ba	2373	ret = MBEDTLS_ERR_SSL_TIMEOUT;
marcozecchini	0:9fca2b23d0ba	2374	else
marcozecchini	0:9fca2b23d0ba	2375	{
marcozecchini	0:9fca2b23d0ba	2376	if( ssl->f_recv_timeout != NULL )
marcozecchini	0:9fca2b23d0ba	2377	{
marcozecchini	0:9fca2b23d0ba	2378	ret = ssl->f_recv_timeout( ssl->p_bio,
marcozecchini	0:9fca2b23d0ba	2379	ssl->in_hdr + ssl->in_left, len,
marcozecchini	0:9fca2b23d0ba	2380	ssl->conf->read_timeout );
marcozecchini	0:9fca2b23d0ba	2381	}
marcozecchini	0:9fca2b23d0ba	2382	else
marcozecchini	0:9fca2b23d0ba	2383	{
marcozecchini	0:9fca2b23d0ba	2384	ret = ssl->f_recv( ssl->p_bio,
marcozecchini	0:9fca2b23d0ba	2385	ssl->in_hdr + ssl->in_left, len );
marcozecchini	0:9fca2b23d0ba	2386	}
marcozecchini	0:9fca2b23d0ba	2387	}
marcozecchini	0:9fca2b23d0ba	2388
marcozecchini	0:9fca2b23d0ba	2389	MBEDTLS_SSL_DEBUG_MSG( 2, ( "in_left: %d, nb_want: %d",
marcozecchini	0:9fca2b23d0ba	2390	ssl->in_left, nb_want ) );
marcozecchini	0:9fca2b23d0ba	2391	MBEDTLS_SSL_DEBUG_RET( 2, "ssl->f_recv(_timeout)", ret );
marcozecchini	0:9fca2b23d0ba	2392
marcozecchini	0:9fca2b23d0ba	2393	if( ret == 0 )
marcozecchini	0:9fca2b23d0ba	2394	return( MBEDTLS_ERR_SSL_CONN_EOF );
marcozecchini	0:9fca2b23d0ba	2395
marcozecchini	0:9fca2b23d0ba	2396	if( ret < 0 )
marcozecchini	0:9fca2b23d0ba	2397	return( ret );
marcozecchini	0:9fca2b23d0ba	2398
marcozecchini	0:9fca2b23d0ba	2399	ssl->in_left += ret;
marcozecchini	0:9fca2b23d0ba	2400	}
marcozecchini	0:9fca2b23d0ba	2401	}
marcozecchini	0:9fca2b23d0ba	2402
marcozecchini	0:9fca2b23d0ba	2403	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= fetch input" ) );
marcozecchini	0:9fca2b23d0ba	2404
marcozecchini	0:9fca2b23d0ba	2405	return( 0 );
marcozecchini	0:9fca2b23d0ba	2406	}
marcozecchini	0:9fca2b23d0ba	2407
marcozecchini	0:9fca2b23d0ba	2408	/*
marcozecchini	0:9fca2b23d0ba	2409	* Flush any data not yet written
marcozecchini	0:9fca2b23d0ba	2410	*/
marcozecchini	0:9fca2b23d0ba	2411	int mbedtls_ssl_flush_output( mbedtls_ssl_context *ssl )
marcozecchini	0:9fca2b23d0ba	2412	{
marcozecchini	0:9fca2b23d0ba	2413	int ret;
marcozecchini	0:9fca2b23d0ba	2414	unsigned char *buf, i;
marcozecchini	0:9fca2b23d0ba	2415
marcozecchini	0:9fca2b23d0ba	2416	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> flush output" ) );
marcozecchini	0:9fca2b23d0ba	2417
marcozecchini	0:9fca2b23d0ba	2418	if( ssl->f_send == NULL )
marcozecchini	0:9fca2b23d0ba	2419	{
marcozecchini	0:9fca2b23d0ba	2420	MBEDTLS_SSL_DEBUG_MSG( 1, ( "Bad usage of mbedtls_ssl_set_bio() "
marcozecchini	0:9fca2b23d0ba	2421	"or mbedtls_ssl_set_bio()" ) );
marcozecchini	0:9fca2b23d0ba	2422	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
marcozecchini	0:9fca2b23d0ba	2423	}
marcozecchini	0:9fca2b23d0ba	2424
marcozecchini	0:9fca2b23d0ba	2425	/* Avoid incrementing counter if data is flushed */
marcozecchini	0:9fca2b23d0ba	2426	if( ssl->out_left == 0 )
marcozecchini	0:9fca2b23d0ba	2427	{
marcozecchini	0:9fca2b23d0ba	2428	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= flush output" ) );
marcozecchini	0:9fca2b23d0ba	2429	return( 0 );
marcozecchini	0:9fca2b23d0ba	2430	}
marcozecchini	0:9fca2b23d0ba	2431
marcozecchini	0:9fca2b23d0ba	2432	while( ssl->out_left > 0 )
marcozecchini	0:9fca2b23d0ba	2433	{
marcozecchini	0:9fca2b23d0ba	2434	MBEDTLS_SSL_DEBUG_MSG( 2, ( "message length: %d, out_left: %d",
marcozecchini	0:9fca2b23d0ba	2435	mbedtls_ssl_hdr_len( ssl ) + ssl->out_msglen, ssl->out_left ) );
marcozecchini	0:9fca2b23d0ba	2436
marcozecchini	0:9fca2b23d0ba	2437	buf = ssl->out_hdr + mbedtls_ssl_hdr_len( ssl ) +
marcozecchini	0:9fca2b23d0ba	2438	ssl->out_msglen - ssl->out_left;
marcozecchini	0:9fca2b23d0ba	2439	ret = ssl->f_send( ssl->p_bio, buf, ssl->out_left );
marcozecchini	0:9fca2b23d0ba	2440
marcozecchini	0:9fca2b23d0ba	2441	MBEDTLS_SSL_DEBUG_RET( 2, "ssl->f_send", ret );
marcozecchini	0:9fca2b23d0ba	2442
marcozecchini	0:9fca2b23d0ba	2443	if( ret <= 0 )
marcozecchini	0:9fca2b23d0ba	2444	return( ret );
marcozecchini	0:9fca2b23d0ba	2445
marcozecchini	0:9fca2b23d0ba	2446	ssl->out_left -= ret;
marcozecchini	0:9fca2b23d0ba	2447	}
marcozecchini	0:9fca2b23d0ba	2448
marcozecchini	0:9fca2b23d0ba	2449	for( i = 8; i > ssl_ep_len( ssl ); i-- )
marcozecchini	0:9fca2b23d0ba	2450	if( ++ssl->out_ctr[i - 1] != 0 )
marcozecchini	0:9fca2b23d0ba	2451	break;
marcozecchini	0:9fca2b23d0ba	2452
marcozecchini	0:9fca2b23d0ba	2453	/* The loop goes to its end iff the counter is wrapping */
marcozecchini	0:9fca2b23d0ba	2454	if( i == ssl_ep_len( ssl ) )
marcozecchini	0:9fca2b23d0ba	2455	{
marcozecchini	0:9fca2b23d0ba	2456	MBEDTLS_SSL_DEBUG_MSG( 1, ( "outgoing message counter would wrap" ) );
marcozecchini	0:9fca2b23d0ba	2457	return( MBEDTLS_ERR_SSL_COUNTER_WRAPPING );
marcozecchini	0:9fca2b23d0ba	2458	}
marcozecchini	0:9fca2b23d0ba	2459
marcozecchini	0:9fca2b23d0ba	2460	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= flush output" ) );
marcozecchini	0:9fca2b23d0ba	2461
marcozecchini	0:9fca2b23d0ba	2462	return( 0 );
marcozecchini	0:9fca2b23d0ba	2463	}
marcozecchini	0:9fca2b23d0ba	2464
marcozecchini	0:9fca2b23d0ba	2465	/*
marcozecchini	0:9fca2b23d0ba	2466	* Functions to handle the DTLS retransmission state machine
marcozecchini	0:9fca2b23d0ba	2467	*/
marcozecchini	0:9fca2b23d0ba	2468	#if defined(MBEDTLS_SSL_PROTO_DTLS)
marcozecchini	0:9fca2b23d0ba	2469	/*
marcozecchini	0:9fca2b23d0ba	2470	* Append current handshake message to current outgoing flight
marcozecchini	0:9fca2b23d0ba	2471	*/
marcozecchini	0:9fca2b23d0ba	2472	static int ssl_flight_append( mbedtls_ssl_context *ssl )
marcozecchini	0:9fca2b23d0ba	2473	{
marcozecchini	0:9fca2b23d0ba	2474	mbedtls_ssl_flight_item *msg;
marcozecchini	0:9fca2b23d0ba	2475
marcozecchini	0:9fca2b23d0ba	2476	/* Allocate space for current message */
marcozecchini	0:9fca2b23d0ba	2477	if( ( msg = mbedtls_calloc( 1, sizeof( mbedtls_ssl_flight_item ) ) ) == NULL )
marcozecchini	0:9fca2b23d0ba	2478	{
marcozecchini	0:9fca2b23d0ba	2479	MBEDTLS_SSL_DEBUG_MSG( 1, ( "alloc %d bytes failed",
marcozecchini	0:9fca2b23d0ba	2480	sizeof( mbedtls_ssl_flight_item ) ) );
marcozecchini	0:9fca2b23d0ba	2481	return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
marcozecchini	0:9fca2b23d0ba	2482	}
marcozecchini	0:9fca2b23d0ba	2483
marcozecchini	0:9fca2b23d0ba	2484	if( ( msg->p = mbedtls_calloc( 1, ssl->out_msglen ) ) == NULL )
marcozecchini	0:9fca2b23d0ba	2485	{
marcozecchini	0:9fca2b23d0ba	2486	MBEDTLS_SSL_DEBUG_MSG( 1, ( "alloc %d bytes failed", ssl->out_msglen ) );
marcozecchini	0:9fca2b23d0ba	2487	mbedtls_free( msg );
marcozecchini	0:9fca2b23d0ba	2488	return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
marcozecchini	0:9fca2b23d0ba	2489	}
marcozecchini	0:9fca2b23d0ba	2490
marcozecchini	0:9fca2b23d0ba	2491	/* Copy current handshake message with headers */
marcozecchini	0:9fca2b23d0ba	2492	memcpy( msg->p, ssl->out_msg, ssl->out_msglen );
marcozecchini	0:9fca2b23d0ba	2493	msg->len = ssl->out_msglen;
marcozecchini	0:9fca2b23d0ba	2494	msg->type = ssl->out_msgtype;
marcozecchini	0:9fca2b23d0ba	2495	msg->next = NULL;
marcozecchini	0:9fca2b23d0ba	2496
marcozecchini	0:9fca2b23d0ba	2497	/* Append to the current flight */
marcozecchini	0:9fca2b23d0ba	2498	if( ssl->handshake->flight == NULL )
marcozecchini	0:9fca2b23d0ba	2499	ssl->handshake->flight = msg;
marcozecchini	0:9fca2b23d0ba	2500	else
marcozecchini	0:9fca2b23d0ba	2501	{
marcozecchini	0:9fca2b23d0ba	2502	mbedtls_ssl_flight_item *cur = ssl->handshake->flight;
marcozecchini	0:9fca2b23d0ba	2503	while( cur->next != NULL )
marcozecchini	0:9fca2b23d0ba	2504	cur = cur->next;
marcozecchini	0:9fca2b23d0ba	2505	cur->next = msg;
marcozecchini	0:9fca2b23d0ba	2506	}
marcozecchini	0:9fca2b23d0ba	2507
marcozecchini	0:9fca2b23d0ba	2508	return( 0 );
marcozecchini	0:9fca2b23d0ba	2509	}
marcozecchini	0:9fca2b23d0ba	2510
marcozecchini	0:9fca2b23d0ba	2511	/*
marcozecchini	0:9fca2b23d0ba	2512	* Free the current flight of handshake messages
marcozecchini	0:9fca2b23d0ba	2513	*/
marcozecchini	0:9fca2b23d0ba	2514	static void ssl_flight_free( mbedtls_ssl_flight_item *flight )
marcozecchini	0:9fca2b23d0ba	2515	{
marcozecchini	0:9fca2b23d0ba	2516	mbedtls_ssl_flight_item *cur = flight;
marcozecchini	0:9fca2b23d0ba	2517	mbedtls_ssl_flight_item *next;
marcozecchini	0:9fca2b23d0ba	2518
marcozecchini	0:9fca2b23d0ba	2519	while( cur != NULL )
marcozecchini	0:9fca2b23d0ba	2520	{
marcozecchini	0:9fca2b23d0ba	2521	next = cur->next;
marcozecchini	0:9fca2b23d0ba	2522
marcozecchini	0:9fca2b23d0ba	2523	mbedtls_free( cur->p );
marcozecchini	0:9fca2b23d0ba	2524	mbedtls_free( cur );
marcozecchini	0:9fca2b23d0ba	2525
marcozecchini	0:9fca2b23d0ba	2526	cur = next;
marcozecchini	0:9fca2b23d0ba	2527	}
marcozecchini	0:9fca2b23d0ba	2528	}
marcozecchini	0:9fca2b23d0ba	2529
marcozecchini	0:9fca2b23d0ba	2530	#if defined(MBEDTLS_SSL_DTLS_ANTI_REPLAY)
marcozecchini	0:9fca2b23d0ba	2531	static void ssl_dtls_replay_reset( mbedtls_ssl_context *ssl );
marcozecchini	0:9fca2b23d0ba	2532	#endif
marcozecchini	0:9fca2b23d0ba	2533
marcozecchini	0:9fca2b23d0ba	2534	/*
marcozecchini	0:9fca2b23d0ba	2535	* Swap transform_out and out_ctr with the alternative ones
marcozecchini	0:9fca2b23d0ba	2536	*/
marcozecchini	0:9fca2b23d0ba	2537	static void ssl_swap_epochs( mbedtls_ssl_context *ssl )
marcozecchini	0:9fca2b23d0ba	2538	{
marcozecchini	0:9fca2b23d0ba	2539	mbedtls_ssl_transform *tmp_transform;
marcozecchini	0:9fca2b23d0ba	2540	unsigned char tmp_out_ctr[8];
marcozecchini	0:9fca2b23d0ba	2541
marcozecchini	0:9fca2b23d0ba	2542	if( ssl->transform_out == ssl->handshake->alt_transform_out )
marcozecchini	0:9fca2b23d0ba	2543	{
marcozecchini	0:9fca2b23d0ba	2544	MBEDTLS_SSL_DEBUG_MSG( 3, ( "skip swap epochs" ) );
marcozecchini	0:9fca2b23d0ba	2545	return;
marcozecchini	0:9fca2b23d0ba	2546	}
marcozecchini	0:9fca2b23d0ba	2547
marcozecchini	0:9fca2b23d0ba	2548	MBEDTLS_SSL_DEBUG_MSG( 3, ( "swap epochs" ) );
marcozecchini	0:9fca2b23d0ba	2549
marcozecchini	0:9fca2b23d0ba	2550	/* Swap transforms */
marcozecchini	0:9fca2b23d0ba	2551	tmp_transform = ssl->transform_out;
marcozecchini	0:9fca2b23d0ba	2552	ssl->transform_out = ssl->handshake->alt_transform_out;
marcozecchini	0:9fca2b23d0ba	2553	ssl->handshake->alt_transform_out = tmp_transform;
marcozecchini	0:9fca2b23d0ba	2554
marcozecchini	0:9fca2b23d0ba	2555	/* Swap epoch + sequence_number */
marcozecchini	0:9fca2b23d0ba	2556	memcpy( tmp_out_ctr, ssl->out_ctr, 8 );
marcozecchini	0:9fca2b23d0ba	2557	memcpy( ssl->out_ctr, ssl->handshake->alt_out_ctr, 8 );
marcozecchini	0:9fca2b23d0ba	2558	memcpy( ssl->handshake->alt_out_ctr, tmp_out_ctr, 8 );
marcozecchini	0:9fca2b23d0ba	2559
marcozecchini	0:9fca2b23d0ba	2560	/* Adjust to the newly activated transform */
marcozecchini	0:9fca2b23d0ba	2561	if( ssl->transform_out != NULL &&
marcozecchini	0:9fca2b23d0ba	2562	ssl->minor_ver >= MBEDTLS_SSL_MINOR_VERSION_2 )
marcozecchini	0:9fca2b23d0ba	2563	{
marcozecchini	0:9fca2b23d0ba	2564	ssl->out_msg = ssl->out_iv + ssl->transform_out->ivlen -
marcozecchini	0:9fca2b23d0ba	2565	ssl->transform_out->fixed_ivlen;
marcozecchini	0:9fca2b23d0ba	2566	}
marcozecchini	0:9fca2b23d0ba	2567	else
marcozecchini	0:9fca2b23d0ba	2568	ssl->out_msg = ssl->out_iv;
marcozecchini	0:9fca2b23d0ba	2569
marcozecchini	0:9fca2b23d0ba	2570	#if defined(MBEDTLS_SSL_HW_RECORD_ACCEL)
marcozecchini	0:9fca2b23d0ba	2571	if( mbedtls_ssl_hw_record_activate != NULL )
marcozecchini	0:9fca2b23d0ba	2572	{
marcozecchini	0:9fca2b23d0ba	2573	if( ( ret = mbedtls_ssl_hw_record_activate( ssl, MBEDTLS_SSL_CHANNEL_OUTBOUND ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	2574	{
marcozecchini	0:9fca2b23d0ba	2575	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_hw_record_activate", ret );
marcozecchini	0:9fca2b23d0ba	2576	return( MBEDTLS_ERR_SSL_HW_ACCEL_FAILED );
marcozecchini	0:9fca2b23d0ba	2577	}
marcozecchini	0:9fca2b23d0ba	2578	}
marcozecchini	0:9fca2b23d0ba	2579	#endif
marcozecchini	0:9fca2b23d0ba	2580	}
marcozecchini	0:9fca2b23d0ba	2581
marcozecchini	0:9fca2b23d0ba	2582	/*
marcozecchini	0:9fca2b23d0ba	2583	* Retransmit the current flight of messages.
marcozecchini	0:9fca2b23d0ba	2584	*
marcozecchini	0:9fca2b23d0ba	2585	* Need to remember the current message in case flush_output returns
marcozecchini	0:9fca2b23d0ba	2586	* WANT_WRITE, causing us to exit this function and come back later.
marcozecchini	0:9fca2b23d0ba	2587	* This function must be called until state is no longer SENDING.
marcozecchini	0:9fca2b23d0ba	2588	*/
marcozecchini	0:9fca2b23d0ba	2589	int mbedtls_ssl_resend( mbedtls_ssl_context *ssl )
marcozecchini	0:9fca2b23d0ba	2590	{
marcozecchini	0:9fca2b23d0ba	2591	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> mbedtls_ssl_resend" ) );
marcozecchini	0:9fca2b23d0ba	2592
marcozecchini	0:9fca2b23d0ba	2593	if( ssl->handshake->retransmit_state != MBEDTLS_SSL_RETRANS_SENDING )
marcozecchini	0:9fca2b23d0ba	2594	{
marcozecchini	0:9fca2b23d0ba	2595	MBEDTLS_SSL_DEBUG_MSG( 2, ( "initialise resending" ) );
marcozecchini	0:9fca2b23d0ba	2596
marcozecchini	0:9fca2b23d0ba	2597	ssl->handshake->cur_msg = ssl->handshake->flight;
marcozecchini	0:9fca2b23d0ba	2598	ssl_swap_epochs( ssl );
marcozecchini	0:9fca2b23d0ba	2599
marcozecchini	0:9fca2b23d0ba	2600	ssl->handshake->retransmit_state = MBEDTLS_SSL_RETRANS_SENDING;
marcozecchini	0:9fca2b23d0ba	2601	}
marcozecchini	0:9fca2b23d0ba	2602
marcozecchini	0:9fca2b23d0ba	2603	while( ssl->handshake->cur_msg != NULL )
marcozecchini	0:9fca2b23d0ba	2604	{
marcozecchini	0:9fca2b23d0ba	2605	int ret;
marcozecchini	0:9fca2b23d0ba	2606	mbedtls_ssl_flight_item *cur = ssl->handshake->cur_msg;
marcozecchini	0:9fca2b23d0ba	2607
marcozecchini	0:9fca2b23d0ba	2608	/* Swap epochs before sending Finished: we can't do it after
marcozecchini	0:9fca2b23d0ba	2609	* sending ChangeCipherSpec, in case write returns WANT_READ.
marcozecchini	0:9fca2b23d0ba	2610	* Must be done before copying, may change out_msg pointer */
marcozecchini	0:9fca2b23d0ba	2611	if( cur->type == MBEDTLS_SSL_MSG_HANDSHAKE &&
marcozecchini	0:9fca2b23d0ba	2612	cur->p[0] == MBEDTLS_SSL_HS_FINISHED )
marcozecchini	0:9fca2b23d0ba	2613	{
marcozecchini	0:9fca2b23d0ba	2614	ssl_swap_epochs( ssl );
marcozecchini	0:9fca2b23d0ba	2615	}
marcozecchini	0:9fca2b23d0ba	2616
marcozecchini	0:9fca2b23d0ba	2617	memcpy( ssl->out_msg, cur->p, cur->len );
marcozecchini	0:9fca2b23d0ba	2618	ssl->out_msglen = cur->len;
marcozecchini	0:9fca2b23d0ba	2619	ssl->out_msgtype = cur->type;
marcozecchini	0:9fca2b23d0ba	2620
marcozecchini	0:9fca2b23d0ba	2621	ssl->handshake->cur_msg = cur->next;
marcozecchini	0:9fca2b23d0ba	2622
marcozecchini	0:9fca2b23d0ba	2623	MBEDTLS_SSL_DEBUG_BUF( 3, "resent handshake message header", ssl->out_msg, 12 );
marcozecchini	0:9fca2b23d0ba	2624
marcozecchini	0:9fca2b23d0ba	2625	if( ( ret = mbedtls_ssl_write_record( ssl ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	2626	{
marcozecchini	0:9fca2b23d0ba	2627	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_write_record", ret );
marcozecchini	0:9fca2b23d0ba	2628	return( ret );
marcozecchini	0:9fca2b23d0ba	2629	}
marcozecchini	0:9fca2b23d0ba	2630	}
marcozecchini	0:9fca2b23d0ba	2631
marcozecchini	0:9fca2b23d0ba	2632	if( ssl->state == MBEDTLS_SSL_HANDSHAKE_OVER )
marcozecchini	0:9fca2b23d0ba	2633	ssl->handshake->retransmit_state = MBEDTLS_SSL_RETRANS_FINISHED;
marcozecchini	0:9fca2b23d0ba	2634	else
marcozecchini	0:9fca2b23d0ba	2635	{
marcozecchini	0:9fca2b23d0ba	2636	ssl->handshake->retransmit_state = MBEDTLS_SSL_RETRANS_WAITING;
marcozecchini	0:9fca2b23d0ba	2637	ssl_set_timer( ssl, ssl->handshake->retransmit_timeout );
marcozecchini	0:9fca2b23d0ba	2638	}
marcozecchini	0:9fca2b23d0ba	2639
marcozecchini	0:9fca2b23d0ba	2640	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= mbedtls_ssl_resend" ) );
marcozecchini	0:9fca2b23d0ba	2641
marcozecchini	0:9fca2b23d0ba	2642	return( 0 );
marcozecchini	0:9fca2b23d0ba	2643	}
marcozecchini	0:9fca2b23d0ba	2644
marcozecchini	0:9fca2b23d0ba	2645	/*
marcozecchini	0:9fca2b23d0ba	2646	* To be called when the last message of an incoming flight is received.
marcozecchini	0:9fca2b23d0ba	2647	*/
marcozecchini	0:9fca2b23d0ba	2648	void mbedtls_ssl_recv_flight_completed( mbedtls_ssl_context *ssl )
marcozecchini	0:9fca2b23d0ba	2649	{
marcozecchini	0:9fca2b23d0ba	2650	/* We won't need to resend that one any more */
marcozecchini	0:9fca2b23d0ba	2651	ssl_flight_free( ssl->handshake->flight );
marcozecchini	0:9fca2b23d0ba	2652	ssl->handshake->flight = NULL;
marcozecchini	0:9fca2b23d0ba	2653	ssl->handshake->cur_msg = NULL;
marcozecchini	0:9fca2b23d0ba	2654
marcozecchini	0:9fca2b23d0ba	2655	/* The next incoming flight will start with this msg_seq */
marcozecchini	0:9fca2b23d0ba	2656	ssl->handshake->in_flight_start_seq = ssl->handshake->in_msg_seq;
marcozecchini	0:9fca2b23d0ba	2657
marcozecchini	0:9fca2b23d0ba	2658	/* Cancel timer */
marcozecchini	0:9fca2b23d0ba	2659	ssl_set_timer( ssl, 0 );
marcozecchini	0:9fca2b23d0ba	2660
marcozecchini	0:9fca2b23d0ba	2661	if( ssl->in_msgtype == MBEDTLS_SSL_MSG_HANDSHAKE &&
marcozecchini	0:9fca2b23d0ba	2662	ssl->in_msg[0] == MBEDTLS_SSL_HS_FINISHED )
marcozecchini	0:9fca2b23d0ba	2663	{
marcozecchini	0:9fca2b23d0ba	2664	ssl->handshake->retransmit_state = MBEDTLS_SSL_RETRANS_FINISHED;
marcozecchini	0:9fca2b23d0ba	2665	}
marcozecchini	0:9fca2b23d0ba	2666	else
marcozecchini	0:9fca2b23d0ba	2667	ssl->handshake->retransmit_state = MBEDTLS_SSL_RETRANS_PREPARING;
marcozecchini	0:9fca2b23d0ba	2668	}
marcozecchini	0:9fca2b23d0ba	2669
marcozecchini	0:9fca2b23d0ba	2670	/*
marcozecchini	0:9fca2b23d0ba	2671	* To be called when the last message of an outgoing flight is send.
marcozecchini	0:9fca2b23d0ba	2672	*/
marcozecchini	0:9fca2b23d0ba	2673	void mbedtls_ssl_send_flight_completed( mbedtls_ssl_context *ssl )
marcozecchini	0:9fca2b23d0ba	2674	{
marcozecchini	0:9fca2b23d0ba	2675	ssl_reset_retransmit_timeout( ssl );
marcozecchini	0:9fca2b23d0ba	2676	ssl_set_timer( ssl, ssl->handshake->retransmit_timeout );
marcozecchini	0:9fca2b23d0ba	2677
marcozecchini	0:9fca2b23d0ba	2678	if( ssl->in_msgtype == MBEDTLS_SSL_MSG_HANDSHAKE &&
marcozecchini	0:9fca2b23d0ba	2679	ssl->in_msg[0] == MBEDTLS_SSL_HS_FINISHED )
marcozecchini	0:9fca2b23d0ba	2680	{
marcozecchini	0:9fca2b23d0ba	2681	ssl->handshake->retransmit_state = MBEDTLS_SSL_RETRANS_FINISHED;
marcozecchini	0:9fca2b23d0ba	2682	}
marcozecchini	0:9fca2b23d0ba	2683	else
marcozecchini	0:9fca2b23d0ba	2684	ssl->handshake->retransmit_state = MBEDTLS_SSL_RETRANS_WAITING;
marcozecchini	0:9fca2b23d0ba	2685	}
marcozecchini	0:9fca2b23d0ba	2686	#endif /* MBEDTLS_SSL_PROTO_DTLS */
marcozecchini	0:9fca2b23d0ba	2687
marcozecchini	0:9fca2b23d0ba	2688	/*
marcozecchini	0:9fca2b23d0ba	2689	* Record layer functions
marcozecchini	0:9fca2b23d0ba	2690	*/
marcozecchini	0:9fca2b23d0ba	2691
marcozecchini	0:9fca2b23d0ba	2692	/*
marcozecchini	0:9fca2b23d0ba	2693	* Write current record.
marcozecchini	0:9fca2b23d0ba	2694	* Uses ssl->out_msgtype, ssl->out_msglen and bytes at ssl->out_msg.
marcozecchini	0:9fca2b23d0ba	2695	*/
marcozecchini	0:9fca2b23d0ba	2696	int mbedtls_ssl_write_record( mbedtls_ssl_context *ssl )
marcozecchini	0:9fca2b23d0ba	2697	{
marcozecchini	0:9fca2b23d0ba	2698	int ret, done = 0, out_msg_type;
marcozecchini	0:9fca2b23d0ba	2699	size_t len = ssl->out_msglen;
marcozecchini	0:9fca2b23d0ba	2700
marcozecchini	0:9fca2b23d0ba	2701	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write record" ) );
marcozecchini	0:9fca2b23d0ba	2702
marcozecchini	0:9fca2b23d0ba	2703	#if defined(MBEDTLS_SSL_PROTO_DTLS)
marcozecchini	0:9fca2b23d0ba	2704	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM &&
marcozecchini	0:9fca2b23d0ba	2705	ssl->handshake != NULL &&
marcozecchini	0:9fca2b23d0ba	2706	ssl->handshake->retransmit_state == MBEDTLS_SSL_RETRANS_SENDING )
marcozecchini	0:9fca2b23d0ba	2707	{
marcozecchini	0:9fca2b23d0ba	2708	; /* Skip special handshake treatment when resending */
marcozecchini	0:9fca2b23d0ba	2709	}
marcozecchini	0:9fca2b23d0ba	2710	else
marcozecchini	0:9fca2b23d0ba	2711	#endif
marcozecchini	0:9fca2b23d0ba	2712	if( ssl->out_msgtype == MBEDTLS_SSL_MSG_HANDSHAKE )
marcozecchini	0:9fca2b23d0ba	2713	{
marcozecchini	0:9fca2b23d0ba	2714	out_msg_type = ssl->out_msg[0];
marcozecchini	0:9fca2b23d0ba	2715
marcozecchini	0:9fca2b23d0ba	2716	if( out_msg_type != MBEDTLS_SSL_HS_HELLO_REQUEST &&
marcozecchini	0:9fca2b23d0ba	2717	ssl->handshake == NULL )
marcozecchini	0:9fca2b23d0ba	2718	{
marcozecchini	0:9fca2b23d0ba	2719	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
marcozecchini	0:9fca2b23d0ba	2720	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
marcozecchini	0:9fca2b23d0ba	2721	}
marcozecchini	0:9fca2b23d0ba	2722
marcozecchini	0:9fca2b23d0ba	2723	ssl->out_msg[1] = (unsigned char)( ( len - 4 ) >> 16 );
marcozecchini	0:9fca2b23d0ba	2724	ssl->out_msg[2] = (unsigned char)( ( len - 4 ) >> 8 );
marcozecchini	0:9fca2b23d0ba	2725	ssl->out_msg[3] = (unsigned char)( ( len - 4 ) );
marcozecchini	0:9fca2b23d0ba	2726
marcozecchini	0:9fca2b23d0ba	2727	/*
marcozecchini	0:9fca2b23d0ba	2728	* DTLS has additional fields in the Handshake layer,
marcozecchini	0:9fca2b23d0ba	2729	* between the length field and the actual payload:
marcozecchini	0:9fca2b23d0ba	2730	* uint16 message_seq;
marcozecchini	0:9fca2b23d0ba	2731	* uint24 fragment_offset;
marcozecchini	0:9fca2b23d0ba	2732	* uint24 fragment_length;
marcozecchini	0:9fca2b23d0ba	2733	*/
marcozecchini	0:9fca2b23d0ba	2734	#if defined(MBEDTLS_SSL_PROTO_DTLS)
marcozecchini	0:9fca2b23d0ba	2735	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
marcozecchini	0:9fca2b23d0ba	2736	{
marcozecchini	0:9fca2b23d0ba	2737	/* Make room for the additional DTLS fields */
marcozecchini	0:9fca2b23d0ba	2738	memmove( ssl->out_msg + 12, ssl->out_msg + 4, len - 4 );
marcozecchini	0:9fca2b23d0ba	2739	ssl->out_msglen += 8;
marcozecchini	0:9fca2b23d0ba	2740	len += 8;
marcozecchini	0:9fca2b23d0ba	2741
marcozecchini	0:9fca2b23d0ba	2742	/* Write message_seq and update it, except for HelloRequest */
marcozecchini	0:9fca2b23d0ba	2743	if( out_msg_type != MBEDTLS_SSL_HS_HELLO_REQUEST )
marcozecchini	0:9fca2b23d0ba	2744	{
marcozecchini	0:9fca2b23d0ba	2745	ssl->out_msg[4] = ( ssl->handshake->out_msg_seq >> 8 ) & 0xFF;
marcozecchini	0:9fca2b23d0ba	2746	ssl->out_msg[5] = ( ssl->handshake->out_msg_seq ) & 0xFF;
marcozecchini	0:9fca2b23d0ba	2747	++( ssl->handshake->out_msg_seq );
marcozecchini	0:9fca2b23d0ba	2748	}
marcozecchini	0:9fca2b23d0ba	2749	else
marcozecchini	0:9fca2b23d0ba	2750	{
marcozecchini	0:9fca2b23d0ba	2751	ssl->out_msg[4] = 0;
marcozecchini	0:9fca2b23d0ba	2752	ssl->out_msg[5] = 0;
marcozecchini	0:9fca2b23d0ba	2753	}
marcozecchini	0:9fca2b23d0ba	2754
marcozecchini	0:9fca2b23d0ba	2755	/* We don't fragment, so frag_offset = 0 and frag_len = len */
marcozecchini	0:9fca2b23d0ba	2756	memset( ssl->out_msg + 6, 0x00, 3 );
marcozecchini	0:9fca2b23d0ba	2757	memcpy( ssl->out_msg + 9, ssl->out_msg + 1, 3 );
marcozecchini	0:9fca2b23d0ba	2758	}
marcozecchini	0:9fca2b23d0ba	2759	#endif /* MBEDTLS_SSL_PROTO_DTLS */
marcozecchini	0:9fca2b23d0ba	2760
marcozecchini	0:9fca2b23d0ba	2761	if( out_msg_type != MBEDTLS_SSL_HS_HELLO_REQUEST )
marcozecchini	0:9fca2b23d0ba	2762	ssl->handshake->update_checksum( ssl, ssl->out_msg, len );
marcozecchini	0:9fca2b23d0ba	2763	}
marcozecchini	0:9fca2b23d0ba	2764
marcozecchini	0:9fca2b23d0ba	2765	/* Save handshake and CCS messages for resending */
marcozecchini	0:9fca2b23d0ba	2766	#if defined(MBEDTLS_SSL_PROTO_DTLS)
marcozecchini	0:9fca2b23d0ba	2767	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM &&
marcozecchini	0:9fca2b23d0ba	2768	ssl->handshake != NULL &&
marcozecchini	0:9fca2b23d0ba	2769	ssl->handshake->retransmit_state != MBEDTLS_SSL_RETRANS_SENDING &&
marcozecchini	0:9fca2b23d0ba	2770	( ssl->out_msgtype == MBEDTLS_SSL_MSG_CHANGE_CIPHER_SPEC \|\|
marcozecchini	0:9fca2b23d0ba	2771	ssl->out_msgtype == MBEDTLS_SSL_MSG_HANDSHAKE ) )
marcozecchini	0:9fca2b23d0ba	2772	{
marcozecchini	0:9fca2b23d0ba	2773	if( ( ret = ssl_flight_append( ssl ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	2774	{
marcozecchini	0:9fca2b23d0ba	2775	MBEDTLS_SSL_DEBUG_RET( 1, "ssl_flight_append", ret );
marcozecchini	0:9fca2b23d0ba	2776	return( ret );
marcozecchini	0:9fca2b23d0ba	2777	}
marcozecchini	0:9fca2b23d0ba	2778	}
marcozecchini	0:9fca2b23d0ba	2779	#endif
marcozecchini	0:9fca2b23d0ba	2780
marcozecchini	0:9fca2b23d0ba	2781	#if defined(MBEDTLS_ZLIB_SUPPORT)
marcozecchini	0:9fca2b23d0ba	2782	if( ssl->transform_out != NULL &&
marcozecchini	0:9fca2b23d0ba	2783	ssl->session_out->compression == MBEDTLS_SSL_COMPRESS_DEFLATE )
marcozecchini	0:9fca2b23d0ba	2784	{
marcozecchini	0:9fca2b23d0ba	2785	if( ( ret = ssl_compress_buf( ssl ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	2786	{
marcozecchini	0:9fca2b23d0ba	2787	MBEDTLS_SSL_DEBUG_RET( 1, "ssl_compress_buf", ret );
marcozecchini	0:9fca2b23d0ba	2788	return( ret );
marcozecchini	0:9fca2b23d0ba	2789	}
marcozecchini	0:9fca2b23d0ba	2790
marcozecchini	0:9fca2b23d0ba	2791	len = ssl->out_msglen;
marcozecchini	0:9fca2b23d0ba	2792	}
marcozecchini	0:9fca2b23d0ba	2793	#endif /MBEDTLS_ZLIB_SUPPORT /
marcozecchini	0:9fca2b23d0ba	2794
marcozecchini	0:9fca2b23d0ba	2795	#if defined(MBEDTLS_SSL_HW_RECORD_ACCEL)
marcozecchini	0:9fca2b23d0ba	2796	if( mbedtls_ssl_hw_record_write != NULL )
marcozecchini	0:9fca2b23d0ba	2797	{
marcozecchini	0:9fca2b23d0ba	2798	MBEDTLS_SSL_DEBUG_MSG( 2, ( "going for mbedtls_ssl_hw_record_write()" ) );
marcozecchini	0:9fca2b23d0ba	2799
marcozecchini	0:9fca2b23d0ba	2800	ret = mbedtls_ssl_hw_record_write( ssl );
marcozecchini	0:9fca2b23d0ba	2801	if( ret != 0 && ret != MBEDTLS_ERR_SSL_HW_ACCEL_FALLTHROUGH )
marcozecchini	0:9fca2b23d0ba	2802	{
marcozecchini	0:9fca2b23d0ba	2803	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_hw_record_write", ret );
marcozecchini	0:9fca2b23d0ba	2804	return( MBEDTLS_ERR_SSL_HW_ACCEL_FAILED );
marcozecchini	0:9fca2b23d0ba	2805	}
marcozecchini	0:9fca2b23d0ba	2806
marcozecchini	0:9fca2b23d0ba	2807	if( ret == 0 )
marcozecchini	0:9fca2b23d0ba	2808	done = 1;
marcozecchini	0:9fca2b23d0ba	2809	}
marcozecchini	0:9fca2b23d0ba	2810	#endif /* MBEDTLS_SSL_HW_RECORD_ACCEL */
marcozecchini	0:9fca2b23d0ba	2811	if( !done )
marcozecchini	0:9fca2b23d0ba	2812	{
marcozecchini	0:9fca2b23d0ba	2813	ssl->out_hdr[0] = (unsigned char) ssl->out_msgtype;
marcozecchini	0:9fca2b23d0ba	2814	mbedtls_ssl_write_version( ssl->major_ver, ssl->minor_ver,
marcozecchini	0:9fca2b23d0ba	2815	ssl->conf->transport, ssl->out_hdr + 1 );
marcozecchini	0:9fca2b23d0ba	2816
marcozecchini	0:9fca2b23d0ba	2817	ssl->out_len[0] = (unsigned char)( len >> 8 );
marcozecchini	0:9fca2b23d0ba	2818	ssl->out_len[1] = (unsigned char)( len );
marcozecchini	0:9fca2b23d0ba	2819
marcozecchini	0:9fca2b23d0ba	2820	if( ssl->transform_out != NULL )
marcozecchini	0:9fca2b23d0ba	2821	{
marcozecchini	0:9fca2b23d0ba	2822	if( ( ret = ssl_encrypt_buf( ssl ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	2823	{
marcozecchini	0:9fca2b23d0ba	2824	MBEDTLS_SSL_DEBUG_RET( 1, "ssl_encrypt_buf", ret );
marcozecchini	0:9fca2b23d0ba	2825	return( ret );
marcozecchini	0:9fca2b23d0ba	2826	}
marcozecchini	0:9fca2b23d0ba	2827
marcozecchini	0:9fca2b23d0ba	2828	len = ssl->out_msglen;
marcozecchini	0:9fca2b23d0ba	2829	ssl->out_len[0] = (unsigned char)( len >> 8 );
marcozecchini	0:9fca2b23d0ba	2830	ssl->out_len[1] = (unsigned char)( len );
marcozecchini	0:9fca2b23d0ba	2831	}
marcozecchini	0:9fca2b23d0ba	2832
marcozecchini	0:9fca2b23d0ba	2833	ssl->out_left = mbedtls_ssl_hdr_len( ssl ) + ssl->out_msglen;
marcozecchini	0:9fca2b23d0ba	2834
marcozecchini	0:9fca2b23d0ba	2835	MBEDTLS_SSL_DEBUG_MSG( 3, ( "output record: msgtype = %d, "
marcozecchini	0:9fca2b23d0ba	2836	"version = [%d:%d], msglen = %d",
marcozecchini	0:9fca2b23d0ba	2837	ssl->out_hdr[0], ssl->out_hdr[1], ssl->out_hdr[2],
marcozecchini	0:9fca2b23d0ba	2838	( ssl->out_len[0] << 8 ) \| ssl->out_len[1] ) );
marcozecchini	0:9fca2b23d0ba	2839
marcozecchini	0:9fca2b23d0ba	2840	MBEDTLS_SSL_DEBUG_BUF( 4, "output record sent to network",
marcozecchini	0:9fca2b23d0ba	2841	ssl->out_hdr, mbedtls_ssl_hdr_len( ssl ) + ssl->out_msglen );
marcozecchini	0:9fca2b23d0ba	2842	}
marcozecchini	0:9fca2b23d0ba	2843
marcozecchini	0:9fca2b23d0ba	2844	if( ( ret = mbedtls_ssl_flush_output( ssl ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	2845	{
marcozecchini	0:9fca2b23d0ba	2846	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_flush_output", ret );
marcozecchini	0:9fca2b23d0ba	2847	return( ret );
marcozecchini	0:9fca2b23d0ba	2848	}
marcozecchini	0:9fca2b23d0ba	2849
marcozecchini	0:9fca2b23d0ba	2850	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= write record" ) );
marcozecchini	0:9fca2b23d0ba	2851
marcozecchini	0:9fca2b23d0ba	2852	return( 0 );
marcozecchini	0:9fca2b23d0ba	2853	}
marcozecchini	0:9fca2b23d0ba	2854
marcozecchini	0:9fca2b23d0ba	2855	#if defined(MBEDTLS_SSL_PROTO_DTLS)
marcozecchini	0:9fca2b23d0ba	2856	/*
marcozecchini	0:9fca2b23d0ba	2857	* Mark bits in bitmask (used for DTLS HS reassembly)
marcozecchini	0:9fca2b23d0ba	2858	*/
marcozecchini	0:9fca2b23d0ba	2859	static void ssl_bitmask_set( unsigned char *mask, size_t offset, size_t len )
marcozecchini	0:9fca2b23d0ba	2860	{
marcozecchini	0:9fca2b23d0ba	2861	unsigned int start_bits, end_bits;
marcozecchini	0:9fca2b23d0ba	2862
marcozecchini	0:9fca2b23d0ba	2863	start_bits = 8 - ( offset % 8 );
marcozecchini	0:9fca2b23d0ba	2864	if( start_bits != 8 )
marcozecchini	0:9fca2b23d0ba	2865	{
marcozecchini	0:9fca2b23d0ba	2866	size_t first_byte_idx = offset / 8;
marcozecchini	0:9fca2b23d0ba	2867
marcozecchini	0:9fca2b23d0ba	2868	/* Special case */
marcozecchini	0:9fca2b23d0ba	2869	if( len <= start_bits )
marcozecchini	0:9fca2b23d0ba	2870	{
marcozecchini	0:9fca2b23d0ba	2871	for( ; len != 0; len-- )
marcozecchini	0:9fca2b23d0ba	2872	mask[first_byte_idx] \|= 1 << ( start_bits - len );
marcozecchini	0:9fca2b23d0ba	2873
marcozecchini	0:9fca2b23d0ba	2874	/* Avoid potential issues with offset or len becoming invalid */
marcozecchini	0:9fca2b23d0ba	2875	return;
marcozecchini	0:9fca2b23d0ba	2876	}
marcozecchini	0:9fca2b23d0ba	2877
marcozecchini	0:9fca2b23d0ba	2878	offset += start_bits; /* Now offset % 8 == 0 */
marcozecchini	0:9fca2b23d0ba	2879	len -= start_bits;
marcozecchini	0:9fca2b23d0ba	2880
marcozecchini	0:9fca2b23d0ba	2881	for( ; start_bits != 0; start_bits-- )
marcozecchini	0:9fca2b23d0ba	2882	mask[first_byte_idx] \|= 1 << ( start_bits - 1 );
marcozecchini	0:9fca2b23d0ba	2883	}
marcozecchini	0:9fca2b23d0ba	2884
marcozecchini	0:9fca2b23d0ba	2885	end_bits = len % 8;
marcozecchini	0:9fca2b23d0ba	2886	if( end_bits != 0 )
marcozecchini	0:9fca2b23d0ba	2887	{
marcozecchini	0:9fca2b23d0ba	2888	size_t last_byte_idx = ( offset + len ) / 8;
marcozecchini	0:9fca2b23d0ba	2889
marcozecchini	0:9fca2b23d0ba	2890	len -= end_bits; /* Now len % 8 == 0 */
marcozecchini	0:9fca2b23d0ba	2891
marcozecchini	0:9fca2b23d0ba	2892	for( ; end_bits != 0; end_bits-- )
marcozecchini	0:9fca2b23d0ba	2893	mask[last_byte_idx] \|= 1 << ( 8 - end_bits );
marcozecchini	0:9fca2b23d0ba	2894	}
marcozecchini	0:9fca2b23d0ba	2895
marcozecchini	0:9fca2b23d0ba	2896	memset( mask + offset / 8, 0xFF, len / 8 );
marcozecchini	0:9fca2b23d0ba	2897	}
marcozecchini	0:9fca2b23d0ba	2898
marcozecchini	0:9fca2b23d0ba	2899	/*
marcozecchini	0:9fca2b23d0ba	2900	* Check that bitmask is full
marcozecchini	0:9fca2b23d0ba	2901	*/
marcozecchini	0:9fca2b23d0ba	2902	static int ssl_bitmask_check( unsigned char *mask, size_t len )
marcozecchini	0:9fca2b23d0ba	2903	{
marcozecchini	0:9fca2b23d0ba	2904	size_t i;
marcozecchini	0:9fca2b23d0ba	2905
marcozecchini	0:9fca2b23d0ba	2906	for( i = 0; i < len / 8; i++ )
marcozecchini	0:9fca2b23d0ba	2907	if( mask[i] != 0xFF )
marcozecchini	0:9fca2b23d0ba	2908	return( -1 );
marcozecchini	0:9fca2b23d0ba	2909
marcozecchini	0:9fca2b23d0ba	2910	for( i = 0; i < len % 8; i++ )
marcozecchini	0:9fca2b23d0ba	2911	if( ( mask[len / 8] & ( 1 << ( 7 - i ) ) ) == 0 )
marcozecchini	0:9fca2b23d0ba	2912	return( -1 );
marcozecchini	0:9fca2b23d0ba	2913
marcozecchini	0:9fca2b23d0ba	2914	return( 0 );
marcozecchini	0:9fca2b23d0ba	2915	}
marcozecchini	0:9fca2b23d0ba	2916
marcozecchini	0:9fca2b23d0ba	2917	/*
marcozecchini	0:9fca2b23d0ba	2918	* Reassemble fragmented DTLS handshake messages.
marcozecchini	0:9fca2b23d0ba	2919	*
marcozecchini	0:9fca2b23d0ba	2920	* Use a temporary buffer for reassembly, divided in two parts:
marcozecchini	0:9fca2b23d0ba	2921	* - the first holds the reassembled message (including handshake header),
marcozecchini	0:9fca2b23d0ba	2922	* - the second holds a bitmask indicating which parts of the message
marcozecchini	0:9fca2b23d0ba	2923	* (excluding headers) have been received so far.
marcozecchini	0:9fca2b23d0ba	2924	*/
marcozecchini	0:9fca2b23d0ba	2925	static int ssl_reassemble_dtls_handshake( mbedtls_ssl_context *ssl )
marcozecchini	0:9fca2b23d0ba	2926	{
marcozecchini	0:9fca2b23d0ba	2927	unsigned char msg, bitmask;
marcozecchini	0:9fca2b23d0ba	2928	size_t frag_len, frag_off;
marcozecchini	0:9fca2b23d0ba	2929	size_t msg_len = ssl->in_hslen - 12; /* Without headers */
marcozecchini	0:9fca2b23d0ba	2930
marcozecchini	0:9fca2b23d0ba	2931	if( ssl->handshake == NULL )
marcozecchini	0:9fca2b23d0ba	2932	{
marcozecchini	0:9fca2b23d0ba	2933	MBEDTLS_SSL_DEBUG_MSG( 1, ( "not supported outside handshake (for now)" ) );
marcozecchini	0:9fca2b23d0ba	2934	return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE );
marcozecchini	0:9fca2b23d0ba	2935	}
marcozecchini	0:9fca2b23d0ba	2936
marcozecchini	0:9fca2b23d0ba	2937	/*
marcozecchini	0:9fca2b23d0ba	2938	* For first fragment, check size and allocate buffer
marcozecchini	0:9fca2b23d0ba	2939	*/
marcozecchini	0:9fca2b23d0ba	2940	if( ssl->handshake->hs_msg == NULL )
marcozecchini	0:9fca2b23d0ba	2941	{
marcozecchini	0:9fca2b23d0ba	2942	size_t alloc_len;
marcozecchini	0:9fca2b23d0ba	2943
marcozecchini	0:9fca2b23d0ba	2944	MBEDTLS_SSL_DEBUG_MSG( 2, ( "initialize reassembly, total length = %d",
marcozecchini	0:9fca2b23d0ba	2945	msg_len ) );
marcozecchini	0:9fca2b23d0ba	2946
marcozecchini	0:9fca2b23d0ba	2947	if( ssl->in_hslen > MBEDTLS_SSL_MAX_CONTENT_LEN )
marcozecchini	0:9fca2b23d0ba	2948	{
marcozecchini	0:9fca2b23d0ba	2949	MBEDTLS_SSL_DEBUG_MSG( 1, ( "handshake message too large" ) );
marcozecchini	0:9fca2b23d0ba	2950	return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE );
marcozecchini	0:9fca2b23d0ba	2951	}
marcozecchini	0:9fca2b23d0ba	2952
marcozecchini	0:9fca2b23d0ba	2953	/* The bitmask needs one bit per byte of message excluding header */
marcozecchini	0:9fca2b23d0ba	2954	alloc_len = 12 + msg_len + msg_len / 8 + ( msg_len % 8 != 0 );
marcozecchini	0:9fca2b23d0ba	2955
marcozecchini	0:9fca2b23d0ba	2956	ssl->handshake->hs_msg = mbedtls_calloc( 1, alloc_len );
marcozecchini	0:9fca2b23d0ba	2957	if( ssl->handshake->hs_msg == NULL )
marcozecchini	0:9fca2b23d0ba	2958	{
marcozecchini	0:9fca2b23d0ba	2959	MBEDTLS_SSL_DEBUG_MSG( 1, ( "alloc failed (%d bytes)", alloc_len ) );
marcozecchini	0:9fca2b23d0ba	2960	return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
marcozecchini	0:9fca2b23d0ba	2961	}
marcozecchini	0:9fca2b23d0ba	2962
marcozecchini	0:9fca2b23d0ba	2963	/* Prepare final header: copy msg_type, length and message_seq,
marcozecchini	0:9fca2b23d0ba	2964	* then add standardised fragment_offset and fragment_length */
marcozecchini	0:9fca2b23d0ba	2965	memcpy( ssl->handshake->hs_msg, ssl->in_msg, 6 );
marcozecchini	0:9fca2b23d0ba	2966	memset( ssl->handshake->hs_msg + 6, 0, 3 );
marcozecchini	0:9fca2b23d0ba	2967	memcpy( ssl->handshake->hs_msg + 9,
marcozecchini	0:9fca2b23d0ba	2968	ssl->handshake->hs_msg + 1, 3 );
marcozecchini	0:9fca2b23d0ba	2969	}
marcozecchini	0:9fca2b23d0ba	2970	else
marcozecchini	0:9fca2b23d0ba	2971	{
marcozecchini	0:9fca2b23d0ba	2972	/* Make sure msg_type and length are consistent */
marcozecchini	0:9fca2b23d0ba	2973	if( memcmp( ssl->handshake->hs_msg, ssl->in_msg, 4 ) != 0 )
marcozecchini	0:9fca2b23d0ba	2974	{
marcozecchini	0:9fca2b23d0ba	2975	MBEDTLS_SSL_DEBUG_MSG( 1, ( "fragment header mismatch" ) );
marcozecchini	0:9fca2b23d0ba	2976	return( MBEDTLS_ERR_SSL_INVALID_RECORD );
marcozecchini	0:9fca2b23d0ba	2977	}
marcozecchini	0:9fca2b23d0ba	2978	}
marcozecchini	0:9fca2b23d0ba	2979
marcozecchini	0:9fca2b23d0ba	2980	msg = ssl->handshake->hs_msg + 12;
marcozecchini	0:9fca2b23d0ba	2981	bitmask = msg + msg_len;
marcozecchini	0:9fca2b23d0ba	2982
marcozecchini	0:9fca2b23d0ba	2983	/*
marcozecchini	0:9fca2b23d0ba	2984	* Check and copy current fragment
marcozecchini	0:9fca2b23d0ba	2985	*/
marcozecchini	0:9fca2b23d0ba	2986	frag_off = ( ssl->in_msg[6] << 16 ) \|
marcozecchini	0:9fca2b23d0ba	2987	( ssl->in_msg[7] << 8 ) \|
marcozecchini	0:9fca2b23d0ba	2988	ssl->in_msg[8];
marcozecchini	0:9fca2b23d0ba	2989	frag_len = ( ssl->in_msg[9] << 16 ) \|
marcozecchini	0:9fca2b23d0ba	2990	( ssl->in_msg[10] << 8 ) \|
marcozecchini	0:9fca2b23d0ba	2991	ssl->in_msg[11];
marcozecchini	0:9fca2b23d0ba	2992
marcozecchini	0:9fca2b23d0ba	2993	if( frag_off + frag_len > msg_len )
marcozecchini	0:9fca2b23d0ba	2994	{
marcozecchini	0:9fca2b23d0ba	2995	MBEDTLS_SSL_DEBUG_MSG( 1, ( "invalid fragment offset/len: %d + %d > %d",
marcozecchini	0:9fca2b23d0ba	2996	frag_off, frag_len, msg_len ) );
marcozecchini	0:9fca2b23d0ba	2997	return( MBEDTLS_ERR_SSL_INVALID_RECORD );
marcozecchini	0:9fca2b23d0ba	2998	}
marcozecchini	0:9fca2b23d0ba	2999
marcozecchini	0:9fca2b23d0ba	3000	if( frag_len + 12 > ssl->in_msglen )
marcozecchini	0:9fca2b23d0ba	3001	{
marcozecchini	0:9fca2b23d0ba	3002	MBEDTLS_SSL_DEBUG_MSG( 1, ( "invalid fragment length: %d + 12 > %d",
marcozecchini	0:9fca2b23d0ba	3003	frag_len, ssl->in_msglen ) );
marcozecchini	0:9fca2b23d0ba	3004	return( MBEDTLS_ERR_SSL_INVALID_RECORD );
marcozecchini	0:9fca2b23d0ba	3005	}
marcozecchini	0:9fca2b23d0ba	3006
marcozecchini	0:9fca2b23d0ba	3007	MBEDTLS_SSL_DEBUG_MSG( 2, ( "adding fragment, offset = %d, length = %d",
marcozecchini	0:9fca2b23d0ba	3008	frag_off, frag_len ) );
marcozecchini	0:9fca2b23d0ba	3009
marcozecchini	0:9fca2b23d0ba	3010	memcpy( msg + frag_off, ssl->in_msg + 12, frag_len );
marcozecchini	0:9fca2b23d0ba	3011	ssl_bitmask_set( bitmask, frag_off, frag_len );
marcozecchini	0:9fca2b23d0ba	3012
marcozecchini	0:9fca2b23d0ba	3013	/*
marcozecchini	0:9fca2b23d0ba	3014	* Do we have the complete message by now?
marcozecchini	0:9fca2b23d0ba	3015	* If yes, finalize it, else ask to read the next record.
marcozecchini	0:9fca2b23d0ba	3016	*/
marcozecchini	0:9fca2b23d0ba	3017	if( ssl_bitmask_check( bitmask, msg_len ) != 0 )
marcozecchini	0:9fca2b23d0ba	3018	{
marcozecchini	0:9fca2b23d0ba	3019	MBEDTLS_SSL_DEBUG_MSG( 2, ( "message is not complete yet" ) );
marcozecchini	0:9fca2b23d0ba	3020	return( MBEDTLS_ERR_SSL_WANT_READ );
marcozecchini	0:9fca2b23d0ba	3021	}
marcozecchini	0:9fca2b23d0ba	3022
marcozecchini	0:9fca2b23d0ba	3023	MBEDTLS_SSL_DEBUG_MSG( 2, ( "handshake message completed" ) );
marcozecchini	0:9fca2b23d0ba	3024
marcozecchini	0:9fca2b23d0ba	3025	if( frag_len + 12 < ssl->in_msglen )
marcozecchini	0:9fca2b23d0ba	3026	{
marcozecchini	0:9fca2b23d0ba	3027	/*
marcozecchini	0:9fca2b23d0ba	3028	* We'got more handshake messages in the same record.
marcozecchini	0:9fca2b23d0ba	3029	* This case is not handled now because no know implementation does
marcozecchini	0:9fca2b23d0ba	3030	* that and it's hard to test, so we prefer to fail cleanly for now.
marcozecchini	0:9fca2b23d0ba	3031	*/
marcozecchini	0:9fca2b23d0ba	3032	MBEDTLS_SSL_DEBUG_MSG( 1, ( "last fragment not alone in its record" ) );
marcozecchini	0:9fca2b23d0ba	3033	return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE );
marcozecchini	0:9fca2b23d0ba	3034	}
marcozecchini	0:9fca2b23d0ba	3035
marcozecchini	0:9fca2b23d0ba	3036	if( ssl->in_left > ssl->next_record_offset )
marcozecchini	0:9fca2b23d0ba	3037	{
marcozecchini	0:9fca2b23d0ba	3038	/*
marcozecchini	0:9fca2b23d0ba	3039	* We've got more data in the buffer after the current record,
marcozecchini	0:9fca2b23d0ba	3040	* that we don't want to overwrite. Move it before writing the
marcozecchini	0:9fca2b23d0ba	3041	* reassembled message, and adjust in_left and next_record_offset.
marcozecchini	0:9fca2b23d0ba	3042	*/
marcozecchini	0:9fca2b23d0ba	3043	unsigned char *cur_remain = ssl->in_hdr + ssl->next_record_offset;
marcozecchini	0:9fca2b23d0ba	3044	unsigned char *new_remain = ssl->in_msg + ssl->in_hslen;
marcozecchini	0:9fca2b23d0ba	3045	size_t remain_len = ssl->in_left - ssl->next_record_offset;
marcozecchini	0:9fca2b23d0ba	3046
marcozecchini	0:9fca2b23d0ba	3047	/* First compute and check new lengths */
marcozecchini	0:9fca2b23d0ba	3048	ssl->next_record_offset = new_remain - ssl->in_hdr;
marcozecchini	0:9fca2b23d0ba	3049	ssl->in_left = ssl->next_record_offset + remain_len;
marcozecchini	0:9fca2b23d0ba	3050
marcozecchini	0:9fca2b23d0ba	3051	if( ssl->in_left > MBEDTLS_SSL_BUFFER_LEN -
marcozecchini	0:9fca2b23d0ba	3052	(size_t)( ssl->in_hdr - ssl->in_buf ) )
marcozecchini	0:9fca2b23d0ba	3053	{
marcozecchini	0:9fca2b23d0ba	3054	MBEDTLS_SSL_DEBUG_MSG( 1, ( "reassembled message too large for buffer" ) );
marcozecchini	0:9fca2b23d0ba	3055	return( MBEDTLS_ERR_SSL_BUFFER_TOO_SMALL );
marcozecchini	0:9fca2b23d0ba	3056	}
marcozecchini	0:9fca2b23d0ba	3057
marcozecchini	0:9fca2b23d0ba	3058	memmove( new_remain, cur_remain, remain_len );
marcozecchini	0:9fca2b23d0ba	3059	}
marcozecchini	0:9fca2b23d0ba	3060
marcozecchini	0:9fca2b23d0ba	3061	memcpy( ssl->in_msg, ssl->handshake->hs_msg, ssl->in_hslen );
marcozecchini	0:9fca2b23d0ba	3062
marcozecchini	0:9fca2b23d0ba	3063	mbedtls_free( ssl->handshake->hs_msg );
marcozecchini	0:9fca2b23d0ba	3064	ssl->handshake->hs_msg = NULL;
marcozecchini	0:9fca2b23d0ba	3065
marcozecchini	0:9fca2b23d0ba	3066	MBEDTLS_SSL_DEBUG_BUF( 3, "reassembled handshake message",
marcozecchini	0:9fca2b23d0ba	3067	ssl->in_msg, ssl->in_hslen );
marcozecchini	0:9fca2b23d0ba	3068
marcozecchini	0:9fca2b23d0ba	3069	return( 0 );
marcozecchini	0:9fca2b23d0ba	3070	}
marcozecchini	0:9fca2b23d0ba	3071	#endif /* MBEDTLS_SSL_PROTO_DTLS */
marcozecchini	0:9fca2b23d0ba	3072
marcozecchini	0:9fca2b23d0ba	3073	int mbedtls_ssl_prepare_handshake_record( mbedtls_ssl_context *ssl )
marcozecchini	0:9fca2b23d0ba	3074	{
marcozecchini	0:9fca2b23d0ba	3075	if( ssl->in_msglen < mbedtls_ssl_hs_hdr_len( ssl ) )
marcozecchini	0:9fca2b23d0ba	3076	{
marcozecchini	0:9fca2b23d0ba	3077	MBEDTLS_SSL_DEBUG_MSG( 1, ( "handshake message too short: %d",
marcozecchini	0:9fca2b23d0ba	3078	ssl->in_msglen ) );
marcozecchini	0:9fca2b23d0ba	3079	return( MBEDTLS_ERR_SSL_INVALID_RECORD );
marcozecchini	0:9fca2b23d0ba	3080	}
marcozecchini	0:9fca2b23d0ba	3081
marcozecchini	0:9fca2b23d0ba	3082	ssl->in_hslen = mbedtls_ssl_hs_hdr_len( ssl ) + (
marcozecchini	0:9fca2b23d0ba	3083	( ssl->in_msg[1] << 16 ) \|
marcozecchini	0:9fca2b23d0ba	3084	( ssl->in_msg[2] << 8 ) \|
marcozecchini	0:9fca2b23d0ba	3085	ssl->in_msg[3] );
marcozecchini	0:9fca2b23d0ba	3086
marcozecchini	0:9fca2b23d0ba	3087	MBEDTLS_SSL_DEBUG_MSG( 3, ( "handshake message: msglen ="
marcozecchini	0:9fca2b23d0ba	3088	" %d, type = %d, hslen = %d",
marcozecchini	0:9fca2b23d0ba	3089	ssl->in_msglen, ssl->in_msg[0], ssl->in_hslen ) );
marcozecchini	0:9fca2b23d0ba	3090
marcozecchini	0:9fca2b23d0ba	3091	#if defined(MBEDTLS_SSL_PROTO_DTLS)
marcozecchini	0:9fca2b23d0ba	3092	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
marcozecchini	0:9fca2b23d0ba	3093	{
marcozecchini	0:9fca2b23d0ba	3094	int ret;
marcozecchini	0:9fca2b23d0ba	3095	unsigned int recv_msg_seq = ( ssl->in_msg[4] << 8 ) \| ssl->in_msg[5];
marcozecchini	0:9fca2b23d0ba	3096
marcozecchini	0:9fca2b23d0ba	3097	/* ssl->handshake is NULL when receiving ClientHello for renego */
marcozecchini	0:9fca2b23d0ba	3098	if( ssl->handshake != NULL &&
marcozecchini	0:9fca2b23d0ba	3099	recv_msg_seq != ssl->handshake->in_msg_seq )
marcozecchini	0:9fca2b23d0ba	3100	{
marcozecchini	0:9fca2b23d0ba	3101	/* Retransmit only on last message from previous flight, to avoid
marcozecchini	0:9fca2b23d0ba	3102	* too many retransmissions.
marcozecchini	0:9fca2b23d0ba	3103	* Besides, No sane server ever retransmits HelloVerifyRequest */
marcozecchini	0:9fca2b23d0ba	3104	if( recv_msg_seq == ssl->handshake->in_flight_start_seq - 1 &&
marcozecchini	0:9fca2b23d0ba	3105	ssl->in_msg[0] != MBEDTLS_SSL_HS_HELLO_VERIFY_REQUEST )
marcozecchini	0:9fca2b23d0ba	3106	{
marcozecchini	0:9fca2b23d0ba	3107	MBEDTLS_SSL_DEBUG_MSG( 2, ( "received message from last flight, "
marcozecchini	0:9fca2b23d0ba	3108	"message_seq = %d, start_of_flight = %d",
marcozecchini	0:9fca2b23d0ba	3109	recv_msg_seq,
marcozecchini	0:9fca2b23d0ba	3110	ssl->handshake->in_flight_start_seq ) );
marcozecchini	0:9fca2b23d0ba	3111
marcozecchini	0:9fca2b23d0ba	3112	if( ( ret = mbedtls_ssl_resend( ssl ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	3113	{
marcozecchini	0:9fca2b23d0ba	3114	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_resend", ret );
marcozecchini	0:9fca2b23d0ba	3115	return( ret );
marcozecchini	0:9fca2b23d0ba	3116	}
marcozecchini	0:9fca2b23d0ba	3117	}
marcozecchini	0:9fca2b23d0ba	3118	else
marcozecchini	0:9fca2b23d0ba	3119	{
marcozecchini	0:9fca2b23d0ba	3120	MBEDTLS_SSL_DEBUG_MSG( 2, ( "dropping out-of-sequence message: "
marcozecchini	0:9fca2b23d0ba	3121	"message_seq = %d, expected = %d",
marcozecchini	0:9fca2b23d0ba	3122	recv_msg_seq,
marcozecchini	0:9fca2b23d0ba	3123	ssl->handshake->in_msg_seq ) );
marcozecchini	0:9fca2b23d0ba	3124	}
marcozecchini	0:9fca2b23d0ba	3125
marcozecchini	0:9fca2b23d0ba	3126	return( MBEDTLS_ERR_SSL_WANT_READ );
marcozecchini	0:9fca2b23d0ba	3127	}
marcozecchini	0:9fca2b23d0ba	3128	/* Wait until message completion to increment in_msg_seq */
marcozecchini	0:9fca2b23d0ba	3129
marcozecchini	0:9fca2b23d0ba	3130	/* Reassemble if current message is fragmented or reassembly is
marcozecchini	0:9fca2b23d0ba	3131	* already in progress */
marcozecchini	0:9fca2b23d0ba	3132	if( ssl->in_msglen < ssl->in_hslen \|\|
marcozecchini	0:9fca2b23d0ba	3133	memcmp( ssl->in_msg + 6, "\0\0\0", 3 ) != 0 \|\|
marcozecchini	0:9fca2b23d0ba	3134	memcmp( ssl->in_msg + 9, ssl->in_msg + 1, 3 ) != 0 \|\|
marcozecchini	0:9fca2b23d0ba	3135	( ssl->handshake != NULL && ssl->handshake->hs_msg != NULL ) )
marcozecchini	0:9fca2b23d0ba	3136	{
marcozecchini	0:9fca2b23d0ba	3137	MBEDTLS_SSL_DEBUG_MSG( 2, ( "found fragmented DTLS handshake message" ) );
marcozecchini	0:9fca2b23d0ba	3138
marcozecchini	0:9fca2b23d0ba	3139	if( ( ret = ssl_reassemble_dtls_handshake( ssl ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	3140	{
marcozecchini	0:9fca2b23d0ba	3141	MBEDTLS_SSL_DEBUG_RET( 1, "ssl_reassemble_dtls_handshake", ret );
marcozecchini	0:9fca2b23d0ba	3142	return( ret );
marcozecchini	0:9fca2b23d0ba	3143	}
marcozecchini	0:9fca2b23d0ba	3144	}
marcozecchini	0:9fca2b23d0ba	3145	}
marcozecchini	0:9fca2b23d0ba	3146	else
marcozecchini	0:9fca2b23d0ba	3147	#endif /* MBEDTLS_SSL_PROTO_DTLS */
marcozecchini	0:9fca2b23d0ba	3148	/* With TLS we don't handle fragmentation (for now) */
marcozecchini	0:9fca2b23d0ba	3149	if( ssl->in_msglen < ssl->in_hslen )
marcozecchini	0:9fca2b23d0ba	3150	{
marcozecchini	0:9fca2b23d0ba	3151	MBEDTLS_SSL_DEBUG_MSG( 1, ( "TLS handshake fragmentation not supported" ) );
marcozecchini	0:9fca2b23d0ba	3152	return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE );
marcozecchini	0:9fca2b23d0ba	3153	}
marcozecchini	0:9fca2b23d0ba	3154
marcozecchini	0:9fca2b23d0ba	3155	return( 0 );
marcozecchini	0:9fca2b23d0ba	3156	}
marcozecchini	0:9fca2b23d0ba	3157
marcozecchini	0:9fca2b23d0ba	3158	void mbedtls_ssl_update_handshake_status( mbedtls_ssl_context *ssl )
marcozecchini	0:9fca2b23d0ba	3159	{
marcozecchini	0:9fca2b23d0ba	3160
marcozecchini	0:9fca2b23d0ba	3161	if( ssl->state != MBEDTLS_SSL_HANDSHAKE_OVER &&
marcozecchini	0:9fca2b23d0ba	3162	ssl->handshake != NULL )
marcozecchini	0:9fca2b23d0ba	3163	{
marcozecchini	0:9fca2b23d0ba	3164	ssl->handshake->update_checksum( ssl, ssl->in_msg, ssl->in_hslen );
marcozecchini	0:9fca2b23d0ba	3165	}
marcozecchini	0:9fca2b23d0ba	3166
marcozecchini	0:9fca2b23d0ba	3167	/* Handshake message is complete, increment counter */
marcozecchini	0:9fca2b23d0ba	3168	#if defined(MBEDTLS_SSL_PROTO_DTLS)
marcozecchini	0:9fca2b23d0ba	3169	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM &&
marcozecchini	0:9fca2b23d0ba	3170	ssl->handshake != NULL )
marcozecchini	0:9fca2b23d0ba	3171	{
marcozecchini	0:9fca2b23d0ba	3172	ssl->handshake->in_msg_seq++;
marcozecchini	0:9fca2b23d0ba	3173	}
marcozecchini	0:9fca2b23d0ba	3174	#endif
marcozecchini	0:9fca2b23d0ba	3175	}
marcozecchini	0:9fca2b23d0ba	3176
marcozecchini	0:9fca2b23d0ba	3177	/*
marcozecchini	0:9fca2b23d0ba	3178	* DTLS anti-replay: RFC 6347 4.1.2.6
marcozecchini	0:9fca2b23d0ba	3179	*
marcozecchini	0:9fca2b23d0ba	3180	* in_window is a field of bits numbered from 0 (lsb) to 63 (msb).
marcozecchini	0:9fca2b23d0ba	3181	* Bit n is set iff record number in_window_top - n has been seen.
marcozecchini	0:9fca2b23d0ba	3182	*
marcozecchini	0:9fca2b23d0ba	3183	* Usually, in_window_top is the last record number seen and the lsb of
marcozecchini	0:9fca2b23d0ba	3184	* in_window is set. The only exception is the initial state (record number 0
marcozecchini	0:9fca2b23d0ba	3185	* not seen yet).
marcozecchini	0:9fca2b23d0ba	3186	*/
marcozecchini	0:9fca2b23d0ba	3187	#if defined(MBEDTLS_SSL_DTLS_ANTI_REPLAY)
marcozecchini	0:9fca2b23d0ba	3188	static void ssl_dtls_replay_reset( mbedtls_ssl_context *ssl )
marcozecchini	0:9fca2b23d0ba	3189	{
marcozecchini	0:9fca2b23d0ba	3190	ssl->in_window_top = 0;
marcozecchini	0:9fca2b23d0ba	3191	ssl->in_window = 0;
marcozecchini	0:9fca2b23d0ba	3192	}
marcozecchini	0:9fca2b23d0ba	3193
marcozecchini	0:9fca2b23d0ba	3194	static inline uint64_t ssl_load_six_bytes( unsigned char *buf )
marcozecchini	0:9fca2b23d0ba	3195	{
marcozecchini	0:9fca2b23d0ba	3196	return( ( (uint64_t) buf[0] << 40 ) \|
marcozecchini	0:9fca2b23d0ba	3197	( (uint64_t) buf[1] << 32 ) \|
marcozecchini	0:9fca2b23d0ba	3198	( (uint64_t) buf[2] << 24 ) \|
marcozecchini	0:9fca2b23d0ba	3199	( (uint64_t) buf[3] << 16 ) \|
marcozecchini	0:9fca2b23d0ba	3200	( (uint64_t) buf[4] << 8 ) \|
marcozecchini	0:9fca2b23d0ba	3201	( (uint64_t) buf[5] ) );
marcozecchini	0:9fca2b23d0ba	3202	}
marcozecchini	0:9fca2b23d0ba	3203
marcozecchini	0:9fca2b23d0ba	3204	/*
marcozecchini	0:9fca2b23d0ba	3205	* Return 0 if sequence number is acceptable, -1 otherwise
marcozecchini	0:9fca2b23d0ba	3206	*/
marcozecchini	0:9fca2b23d0ba	3207	int mbedtls_ssl_dtls_replay_check( mbedtls_ssl_context *ssl )
marcozecchini	0:9fca2b23d0ba	3208	{
marcozecchini	0:9fca2b23d0ba	3209	uint64_t rec_seqnum = ssl_load_six_bytes( ssl->in_ctr + 2 );
marcozecchini	0:9fca2b23d0ba	3210	uint64_t bit;
marcozecchini	0:9fca2b23d0ba	3211
marcozecchini	0:9fca2b23d0ba	3212	if( ssl->conf->anti_replay == MBEDTLS_SSL_ANTI_REPLAY_DISABLED )
marcozecchini	0:9fca2b23d0ba	3213	return( 0 );
marcozecchini	0:9fca2b23d0ba	3214
marcozecchini	0:9fca2b23d0ba	3215	if( rec_seqnum > ssl->in_window_top )
marcozecchini	0:9fca2b23d0ba	3216	return( 0 );
marcozecchini	0:9fca2b23d0ba	3217
marcozecchini	0:9fca2b23d0ba	3218	bit = ssl->in_window_top - rec_seqnum;
marcozecchini	0:9fca2b23d0ba	3219
marcozecchini	0:9fca2b23d0ba	3220	if( bit >= 64 )
marcozecchini	0:9fca2b23d0ba	3221	return( -1 );
marcozecchini	0:9fca2b23d0ba	3222
marcozecchini	0:9fca2b23d0ba	3223	if( ( ssl->in_window & ( (uint64_t) 1 << bit ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	3224	return( -1 );
marcozecchini	0:9fca2b23d0ba	3225
marcozecchini	0:9fca2b23d0ba	3226	return( 0 );
marcozecchini	0:9fca2b23d0ba	3227	}
marcozecchini	0:9fca2b23d0ba	3228
marcozecchini	0:9fca2b23d0ba	3229	/*
marcozecchini	0:9fca2b23d0ba	3230	* Update replay window on new validated record
marcozecchini	0:9fca2b23d0ba	3231	*/
marcozecchini	0:9fca2b23d0ba	3232	void mbedtls_ssl_dtls_replay_update( mbedtls_ssl_context *ssl )
marcozecchini	0:9fca2b23d0ba	3233	{
marcozecchini	0:9fca2b23d0ba	3234	uint64_t rec_seqnum = ssl_load_six_bytes( ssl->in_ctr + 2 );
marcozecchini	0:9fca2b23d0ba	3235
marcozecchini	0:9fca2b23d0ba	3236	if( ssl->conf->anti_replay == MBEDTLS_SSL_ANTI_REPLAY_DISABLED )
marcozecchini	0:9fca2b23d0ba	3237	return;
marcozecchini	0:9fca2b23d0ba	3238
marcozecchini	0:9fca2b23d0ba	3239	if( rec_seqnum > ssl->in_window_top )
marcozecchini	0:9fca2b23d0ba	3240	{
marcozecchini	0:9fca2b23d0ba	3241	/* Update window_top and the contents of the window */
marcozecchini	0:9fca2b23d0ba	3242	uint64_t shift = rec_seqnum - ssl->in_window_top;
marcozecchini	0:9fca2b23d0ba	3243
marcozecchini	0:9fca2b23d0ba	3244	if( shift >= 64 )
marcozecchini	0:9fca2b23d0ba	3245	ssl->in_window = 1;
marcozecchini	0:9fca2b23d0ba	3246	else
marcozecchini	0:9fca2b23d0ba	3247	{
marcozecchini	0:9fca2b23d0ba	3248	ssl->in_window <<= shift;
marcozecchini	0:9fca2b23d0ba	3249	ssl->in_window \|= 1;
marcozecchini	0:9fca2b23d0ba	3250	}
marcozecchini	0:9fca2b23d0ba	3251
marcozecchini	0:9fca2b23d0ba	3252	ssl->in_window_top = rec_seqnum;
marcozecchini	0:9fca2b23d0ba	3253	}
marcozecchini	0:9fca2b23d0ba	3254	else
marcozecchini	0:9fca2b23d0ba	3255	{
marcozecchini	0:9fca2b23d0ba	3256	/* Mark that number as seen in the current window */
marcozecchini	0:9fca2b23d0ba	3257	uint64_t bit = ssl->in_window_top - rec_seqnum;
marcozecchini	0:9fca2b23d0ba	3258
marcozecchini	0:9fca2b23d0ba	3259	if( bit < 64 ) /* Always true, but be extra sure */
marcozecchini	0:9fca2b23d0ba	3260	ssl->in_window \|= (uint64_t) 1 << bit;
marcozecchini	0:9fca2b23d0ba	3261	}
marcozecchini	0:9fca2b23d0ba	3262	}
marcozecchini	0:9fca2b23d0ba	3263	#endif /* MBEDTLS_SSL_DTLS_ANTI_REPLAY */
marcozecchini	0:9fca2b23d0ba	3264
marcozecchini	0:9fca2b23d0ba	3265	#if defined(MBEDTLS_SSL_DTLS_CLIENT_PORT_REUSE) && defined(MBEDTLS_SSL_SRV_C)
marcozecchini	0:9fca2b23d0ba	3266	/* Forward declaration */
marcozecchini	0:9fca2b23d0ba	3267	static int ssl_session_reset_int( mbedtls_ssl_context *ssl, int partial );
marcozecchini	0:9fca2b23d0ba	3268
marcozecchini	0:9fca2b23d0ba	3269	/*
marcozecchini	0:9fca2b23d0ba	3270	* Without any SSL context, check if a datagram looks like a ClientHello with
marcozecchini	0:9fca2b23d0ba	3271	* a valid cookie, and if it doesn't, generate a HelloVerifyRequest message.
marcozecchini	0:9fca2b23d0ba	3272	* Both input and output include full DTLS headers.
marcozecchini	0:9fca2b23d0ba	3273	*
marcozecchini	0:9fca2b23d0ba	3274	* - if cookie is valid, return 0
marcozecchini	0:9fca2b23d0ba	3275	* - if ClientHello looks superficially valid but cookie is not,
marcozecchini	0:9fca2b23d0ba	3276	* fill obuf and set olen, then
marcozecchini	0:9fca2b23d0ba	3277	* return MBEDTLS_ERR_SSL_HELLO_VERIFY_REQUIRED
marcozecchini	0:9fca2b23d0ba	3278	* - otherwise return a specific error code
marcozecchini	0:9fca2b23d0ba	3279	*/
marcozecchini	0:9fca2b23d0ba	3280	static int ssl_check_dtls_clihlo_cookie(
marcozecchini	0:9fca2b23d0ba	3281	mbedtls_ssl_cookie_write_t *f_cookie_write,
marcozecchini	0:9fca2b23d0ba	3282	mbedtls_ssl_cookie_check_t *f_cookie_check,
marcozecchini	0:9fca2b23d0ba	3283	void *p_cookie,
marcozecchini	0:9fca2b23d0ba	3284	const unsigned char *cli_id, size_t cli_id_len,
marcozecchini	0:9fca2b23d0ba	3285	const unsigned char *in, size_t in_len,
marcozecchini	0:9fca2b23d0ba	3286	unsigned char obuf, size_t buf_len, size_t olen )
marcozecchini	0:9fca2b23d0ba	3287	{
marcozecchini	0:9fca2b23d0ba	3288	size_t sid_len, cookie_len;
marcozecchini	0:9fca2b23d0ba	3289	unsigned char *p;
marcozecchini	0:9fca2b23d0ba	3290
marcozecchini	0:9fca2b23d0ba	3291	if( f_cookie_write == NULL \|\| f_cookie_check == NULL )
marcozecchini	0:9fca2b23d0ba	3292	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
marcozecchini	0:9fca2b23d0ba	3293
marcozecchini	0:9fca2b23d0ba	3294	/*
marcozecchini	0:9fca2b23d0ba	3295	* Structure of ClientHello with record and handshake headers,
marcozecchini	0:9fca2b23d0ba	3296	* and expected values. We don't need to check a lot, more checks will be
marcozecchini	0:9fca2b23d0ba	3297	* done when actually parsing the ClientHello - skipping those checks
marcozecchini	0:9fca2b23d0ba	3298	* avoids code duplication and does not make cookie forging any easier.
marcozecchini	0:9fca2b23d0ba	3299	*
marcozecchini	0:9fca2b23d0ba	3300	* 0-0 ContentType type; copied, must be handshake
marcozecchini	0:9fca2b23d0ba	3301	* 1-2 ProtocolVersion version; copied
marcozecchini	0:9fca2b23d0ba	3302	* 3-4 uint16 epoch; copied, must be 0
marcozecchini	0:9fca2b23d0ba	3303	* 5-10 uint48 sequence_number; copied
marcozecchini	0:9fca2b23d0ba	3304	* 11-12 uint16 length; (ignored)
marcozecchini	0:9fca2b23d0ba	3305	*
marcozecchini	0:9fca2b23d0ba	3306	* 13-13 HandshakeType msg_type; (ignored)
marcozecchini	0:9fca2b23d0ba	3307	* 14-16 uint24 length; (ignored)
marcozecchini	0:9fca2b23d0ba	3308	* 17-18 uint16 message_seq; copied
marcozecchini	0:9fca2b23d0ba	3309	* 19-21 uint24 fragment_offset; copied, must be 0
marcozecchini	0:9fca2b23d0ba	3310	* 22-24 uint24 fragment_length; (ignored)
marcozecchini	0:9fca2b23d0ba	3311	*
marcozecchini	0:9fca2b23d0ba	3312	* 25-26 ProtocolVersion client_version; (ignored)
marcozecchini	0:9fca2b23d0ba	3313	* 27-58 Random random; (ignored)
marcozecchini	0:9fca2b23d0ba	3314	* 59-xx SessionID session_id; 1 byte len + sid_len content
marcozecchini	0:9fca2b23d0ba	3315	* 60+ opaque cookie<0..2^8-1>; 1 byte len + content
marcozecchini	0:9fca2b23d0ba	3316	* ...
marcozecchini	0:9fca2b23d0ba	3317	*
marcozecchini	0:9fca2b23d0ba	3318	* Minimum length is 61 bytes.
marcozecchini	0:9fca2b23d0ba	3319	*/
marcozecchini	0:9fca2b23d0ba	3320	if( in_len < 61 \|\|
marcozecchini	0:9fca2b23d0ba	3321	in[0] != MBEDTLS_SSL_MSG_HANDSHAKE \|\|
marcozecchini	0:9fca2b23d0ba	3322	in[3] != 0 \|\| in[4] != 0 \|\|
marcozecchini	0:9fca2b23d0ba	3323	in[19] != 0 \|\| in[20] != 0 \|\| in[21] != 0 )
marcozecchini	0:9fca2b23d0ba	3324	{
marcozecchini	0:9fca2b23d0ba	3325	return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
marcozecchini	0:9fca2b23d0ba	3326	}
marcozecchini	0:9fca2b23d0ba	3327
marcozecchini	0:9fca2b23d0ba	3328	sid_len = in[59];
marcozecchini	0:9fca2b23d0ba	3329	if( sid_len > in_len - 61 )
marcozecchini	0:9fca2b23d0ba	3330	return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
marcozecchini	0:9fca2b23d0ba	3331
marcozecchini	0:9fca2b23d0ba	3332	cookie_len = in[60 + sid_len];
marcozecchini	0:9fca2b23d0ba	3333	if( cookie_len > in_len - 60 )
marcozecchini	0:9fca2b23d0ba	3334	return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
marcozecchini	0:9fca2b23d0ba	3335
marcozecchini	0:9fca2b23d0ba	3336	if( f_cookie_check( p_cookie, in + sid_len + 61, cookie_len,
marcozecchini	0:9fca2b23d0ba	3337	cli_id, cli_id_len ) == 0 )
marcozecchini	0:9fca2b23d0ba	3338	{
marcozecchini	0:9fca2b23d0ba	3339	/* Valid cookie */
marcozecchini	0:9fca2b23d0ba	3340	return( 0 );
marcozecchini	0:9fca2b23d0ba	3341	}
marcozecchini	0:9fca2b23d0ba	3342
marcozecchini	0:9fca2b23d0ba	3343	/*
marcozecchini	0:9fca2b23d0ba	3344	* If we get here, we've got an invalid cookie, let's prepare HVR.
marcozecchini	0:9fca2b23d0ba	3345	*
marcozecchini	0:9fca2b23d0ba	3346	* 0-0 ContentType type; copied
marcozecchini	0:9fca2b23d0ba	3347	* 1-2 ProtocolVersion version; copied
marcozecchini	0:9fca2b23d0ba	3348	* 3-4 uint16 epoch; copied
marcozecchini	0:9fca2b23d0ba	3349	* 5-10 uint48 sequence_number; copied
marcozecchini	0:9fca2b23d0ba	3350	* 11-12 uint16 length; olen - 13
marcozecchini	0:9fca2b23d0ba	3351	*
marcozecchini	0:9fca2b23d0ba	3352	* 13-13 HandshakeType msg_type; hello_verify_request
marcozecchini	0:9fca2b23d0ba	3353	* 14-16 uint24 length; olen - 25
marcozecchini	0:9fca2b23d0ba	3354	* 17-18 uint16 message_seq; copied
marcozecchini	0:9fca2b23d0ba	3355	* 19-21 uint24 fragment_offset; copied
marcozecchini	0:9fca2b23d0ba	3356	* 22-24 uint24 fragment_length; olen - 25
marcozecchini	0:9fca2b23d0ba	3357	*
marcozecchini	0:9fca2b23d0ba	3358	* 25-26 ProtocolVersion server_version; 0xfe 0xff
marcozecchini	0:9fca2b23d0ba	3359	* 27-27 opaque cookie<0..2^8-1>; cookie_len = olen - 27, cookie
marcozecchini	0:9fca2b23d0ba	3360	*
marcozecchini	0:9fca2b23d0ba	3361	* Minimum length is 28.
marcozecchini	0:9fca2b23d0ba	3362	*/
marcozecchini	0:9fca2b23d0ba	3363	if( buf_len < 28 )
marcozecchini	0:9fca2b23d0ba	3364	return( MBEDTLS_ERR_SSL_BUFFER_TOO_SMALL );
marcozecchini	0:9fca2b23d0ba	3365
marcozecchini	0:9fca2b23d0ba	3366	/* Copy most fields and adapt others */
marcozecchini	0:9fca2b23d0ba	3367	memcpy( obuf, in, 25 );
marcozecchini	0:9fca2b23d0ba	3368	obuf[13] = MBEDTLS_SSL_HS_HELLO_VERIFY_REQUEST;
marcozecchini	0:9fca2b23d0ba	3369	obuf[25] = 0xfe;
marcozecchini	0:9fca2b23d0ba	3370	obuf[26] = 0xff;
marcozecchini	0:9fca2b23d0ba	3371
marcozecchini	0:9fca2b23d0ba	3372	/* Generate and write actual cookie */
marcozecchini	0:9fca2b23d0ba	3373	p = obuf + 28;
marcozecchini	0:9fca2b23d0ba	3374	if( f_cookie_write( p_cookie,
marcozecchini	0:9fca2b23d0ba	3375	&p, obuf + buf_len, cli_id, cli_id_len ) != 0 )
marcozecchini	0:9fca2b23d0ba	3376	{
marcozecchini	0:9fca2b23d0ba	3377	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
marcozecchini	0:9fca2b23d0ba	3378	}
marcozecchini	0:9fca2b23d0ba	3379
marcozecchini	0:9fca2b23d0ba	3380	*olen = p - obuf;
marcozecchini	0:9fca2b23d0ba	3381
marcozecchini	0:9fca2b23d0ba	3382	/* Go back and fill length fields */
marcozecchini	0:9fca2b23d0ba	3383	obuf[27] = (unsigned char)( *olen - 28 );
marcozecchini	0:9fca2b23d0ba	3384
marcozecchini	0:9fca2b23d0ba	3385	obuf[14] = obuf[22] = (unsigned char)( ( *olen - 25 ) >> 16 );
marcozecchini	0:9fca2b23d0ba	3386	obuf[15] = obuf[23] = (unsigned char)( ( *olen - 25 ) >> 8 );
marcozecchini	0:9fca2b23d0ba	3387	obuf[16] = obuf[24] = (unsigned char)( ( *olen - 25 ) );
marcozecchini	0:9fca2b23d0ba	3388
marcozecchini	0:9fca2b23d0ba	3389	obuf[11] = (unsigned char)( ( *olen - 13 ) >> 8 );
marcozecchini	0:9fca2b23d0ba	3390	obuf[12] = (unsigned char)( ( *olen - 13 ) );
marcozecchini	0:9fca2b23d0ba	3391
marcozecchini	0:9fca2b23d0ba	3392	return( MBEDTLS_ERR_SSL_HELLO_VERIFY_REQUIRED );
marcozecchini	0:9fca2b23d0ba	3393	}
marcozecchini	0:9fca2b23d0ba	3394
marcozecchini	0:9fca2b23d0ba	3395	/*
marcozecchini	0:9fca2b23d0ba	3396	* Handle possible client reconnect with the same UDP quadruplet
marcozecchini	0:9fca2b23d0ba	3397	* (RFC 6347 Section 4.2.8).
marcozecchini	0:9fca2b23d0ba	3398	*
marcozecchini	0:9fca2b23d0ba	3399	* Called by ssl_parse_record_header() in case we receive an epoch 0 record
marcozecchini	0:9fca2b23d0ba	3400	* that looks like a ClientHello.
marcozecchini	0:9fca2b23d0ba	3401	*
marcozecchini	0:9fca2b23d0ba	3402	* - if the input looks like a ClientHello without cookies,
marcozecchini	0:9fca2b23d0ba	3403	* send back HelloVerifyRequest, then
marcozecchini	0:9fca2b23d0ba	3404	* return MBEDTLS_ERR_SSL_HELLO_VERIFY_REQUIRED
marcozecchini	0:9fca2b23d0ba	3405	* - if the input looks like a ClientHello with a valid cookie,
marcozecchini	0:9fca2b23d0ba	3406	* reset the session of the current context, and
marcozecchini	0:9fca2b23d0ba	3407	* return MBEDTLS_ERR_SSL_CLIENT_RECONNECT
marcozecchini	0:9fca2b23d0ba	3408	* - if anything goes wrong, return a specific error code
marcozecchini	0:9fca2b23d0ba	3409	*
marcozecchini	0:9fca2b23d0ba	3410	* mbedtls_ssl_read_record() will ignore the record if anything else than
marcozecchini	0:9fca2b23d0ba	3411	* MBEDTLS_ERR_SSL_CLIENT_RECONNECT or 0 is returned, although this function
marcozecchini	0:9fca2b23d0ba	3412	* cannot not return 0.
marcozecchini	0:9fca2b23d0ba	3413	*/
marcozecchini	0:9fca2b23d0ba	3414	static int ssl_handle_possible_reconnect( mbedtls_ssl_context *ssl )
marcozecchini	0:9fca2b23d0ba	3415	{
marcozecchini	0:9fca2b23d0ba	3416	int ret;
marcozecchini	0:9fca2b23d0ba	3417	size_t len;
marcozecchini	0:9fca2b23d0ba	3418
marcozecchini	0:9fca2b23d0ba	3419	ret = ssl_check_dtls_clihlo_cookie(
marcozecchini	0:9fca2b23d0ba	3420	ssl->conf->f_cookie_write,
marcozecchini	0:9fca2b23d0ba	3421	ssl->conf->f_cookie_check,
marcozecchini	0:9fca2b23d0ba	3422	ssl->conf->p_cookie,
marcozecchini	0:9fca2b23d0ba	3423	ssl->cli_id, ssl->cli_id_len,
marcozecchini	0:9fca2b23d0ba	3424	ssl->in_buf, ssl->in_left,
marcozecchini	0:9fca2b23d0ba	3425	ssl->out_buf, MBEDTLS_SSL_MAX_CONTENT_LEN, &len );
marcozecchini	0:9fca2b23d0ba	3426
marcozecchini	0:9fca2b23d0ba	3427	MBEDTLS_SSL_DEBUG_RET( 2, "ssl_check_dtls_clihlo_cookie", ret );
marcozecchini	0:9fca2b23d0ba	3428
marcozecchini	0:9fca2b23d0ba	3429	if( ret == MBEDTLS_ERR_SSL_HELLO_VERIFY_REQUIRED )
marcozecchini	0:9fca2b23d0ba	3430	{
marcozecchini	0:9fca2b23d0ba	3431	/* Don't check write errors as we can't do anything here.
marcozecchini	0:9fca2b23d0ba	3432	* If the error is permanent we'll catch it later,
marcozecchini	0:9fca2b23d0ba	3433	* if it's not, then hopefully it'll work next time. */
marcozecchini	0:9fca2b23d0ba	3434	(void) ssl->f_send( ssl->p_bio, ssl->out_buf, len );
marcozecchini	0:9fca2b23d0ba	3435
marcozecchini	0:9fca2b23d0ba	3436	return( MBEDTLS_ERR_SSL_HELLO_VERIFY_REQUIRED );
marcozecchini	0:9fca2b23d0ba	3437	}
marcozecchini	0:9fca2b23d0ba	3438
marcozecchini	0:9fca2b23d0ba	3439	if( ret == 0 )
marcozecchini	0:9fca2b23d0ba	3440	{
marcozecchini	0:9fca2b23d0ba	3441	/* Got a valid cookie, partially reset context */
marcozecchini	0:9fca2b23d0ba	3442	if( ( ret = ssl_session_reset_int( ssl, 1 ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	3443	{
marcozecchini	0:9fca2b23d0ba	3444	MBEDTLS_SSL_DEBUG_RET( 1, "reset", ret );
marcozecchini	0:9fca2b23d0ba	3445	return( ret );
marcozecchini	0:9fca2b23d0ba	3446	}
marcozecchini	0:9fca2b23d0ba	3447
marcozecchini	0:9fca2b23d0ba	3448	return( MBEDTLS_ERR_SSL_CLIENT_RECONNECT );
marcozecchini	0:9fca2b23d0ba	3449	}
marcozecchini	0:9fca2b23d0ba	3450
marcozecchini	0:9fca2b23d0ba	3451	return( ret );
marcozecchini	0:9fca2b23d0ba	3452	}
marcozecchini	0:9fca2b23d0ba	3453	#endif /* MBEDTLS_SSL_DTLS_CLIENT_PORT_REUSE && MBEDTLS_SSL_SRV_C */
marcozecchini	0:9fca2b23d0ba	3454
marcozecchini	0:9fca2b23d0ba	3455	/*
marcozecchini	0:9fca2b23d0ba	3456	* ContentType type;
marcozecchini	0:9fca2b23d0ba	3457	* ProtocolVersion version;
marcozecchini	0:9fca2b23d0ba	3458	* uint16 epoch; // DTLS only
marcozecchini	0:9fca2b23d0ba	3459	* uint48 sequence_number; // DTLS only
marcozecchini	0:9fca2b23d0ba	3460	* uint16 length;
marcozecchini	0:9fca2b23d0ba	3461	*
marcozecchini	0:9fca2b23d0ba	3462	* Return 0 if header looks sane (and, for DTLS, the record is expected)
marcozecchini	0:9fca2b23d0ba	3463	* MBEDTLS_ERR_SSL_INVALID_RECORD if the header looks bad,
marcozecchini	0:9fca2b23d0ba	3464	* MBEDTLS_ERR_SSL_UNEXPECTED_RECORD (DTLS only) if sane but unexpected.
marcozecchini	0:9fca2b23d0ba	3465	*
marcozecchini	0:9fca2b23d0ba	3466	* With DTLS, mbedtls_ssl_read_record() will:
marcozecchini	0:9fca2b23d0ba	3467	* 1. proceed with the record if this function returns 0
marcozecchini	0:9fca2b23d0ba	3468	* 2. drop only the current record if this function returns UNEXPECTED_RECORD
marcozecchini	0:9fca2b23d0ba	3469	* 3. return CLIENT_RECONNECT if this function return that value
marcozecchini	0:9fca2b23d0ba	3470	* 4. drop the whole datagram if this function returns anything else.
marcozecchini	0:9fca2b23d0ba	3471	* Point 2 is needed when the peer is resending, and we have already received
marcozecchini	0:9fca2b23d0ba	3472	* the first record from a datagram but are still waiting for the others.
marcozecchini	0:9fca2b23d0ba	3473	*/
marcozecchini	0:9fca2b23d0ba	3474	static int ssl_parse_record_header( mbedtls_ssl_context *ssl )
marcozecchini	0:9fca2b23d0ba	3475	{
marcozecchini	0:9fca2b23d0ba	3476	int major_ver, minor_ver;
marcozecchini	0:9fca2b23d0ba	3477
marcozecchini	0:9fca2b23d0ba	3478	MBEDTLS_SSL_DEBUG_BUF( 4, "input record header", ssl->in_hdr, mbedtls_ssl_hdr_len( ssl ) );
marcozecchini	0:9fca2b23d0ba	3479
marcozecchini	0:9fca2b23d0ba	3480	ssl->in_msgtype = ssl->in_hdr[0];
marcozecchini	0:9fca2b23d0ba	3481	ssl->in_msglen = ( ssl->in_len[0] << 8 ) \| ssl->in_len[1];
marcozecchini	0:9fca2b23d0ba	3482	mbedtls_ssl_read_version( &major_ver, &minor_ver, ssl->conf->transport, ssl->in_hdr + 1 );
marcozecchini	0:9fca2b23d0ba	3483
marcozecchini	0:9fca2b23d0ba	3484	MBEDTLS_SSL_DEBUG_MSG( 3, ( "input record: msgtype = %d, "
marcozecchini	0:9fca2b23d0ba	3485	"version = [%d:%d], msglen = %d",
marcozecchini	0:9fca2b23d0ba	3486	ssl->in_msgtype,
marcozecchini	0:9fca2b23d0ba	3487	major_ver, minor_ver, ssl->in_msglen ) );
marcozecchini	0:9fca2b23d0ba	3488
marcozecchini	0:9fca2b23d0ba	3489	/* Check record type */
marcozecchini	0:9fca2b23d0ba	3490	if( ssl->in_msgtype != MBEDTLS_SSL_MSG_HANDSHAKE &&
marcozecchini	0:9fca2b23d0ba	3491	ssl->in_msgtype != MBEDTLS_SSL_MSG_ALERT &&
marcozecchini	0:9fca2b23d0ba	3492	ssl->in_msgtype != MBEDTLS_SSL_MSG_CHANGE_CIPHER_SPEC &&
marcozecchini	0:9fca2b23d0ba	3493	ssl->in_msgtype != MBEDTLS_SSL_MSG_APPLICATION_DATA )
marcozecchini	0:9fca2b23d0ba	3494	{
marcozecchini	0:9fca2b23d0ba	3495	MBEDTLS_SSL_DEBUG_MSG( 1, ( "unknown record type" ) );
marcozecchini	0:9fca2b23d0ba	3496	mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
marcozecchini	0:9fca2b23d0ba	3497	MBEDTLS_SSL_ALERT_MSG_UNEXPECTED_MESSAGE );
marcozecchini	0:9fca2b23d0ba	3498	return( MBEDTLS_ERR_SSL_INVALID_RECORD );
marcozecchini	0:9fca2b23d0ba	3499	}
marcozecchini	0:9fca2b23d0ba	3500
marcozecchini	0:9fca2b23d0ba	3501	/* Check version */
marcozecchini	0:9fca2b23d0ba	3502	if( major_ver != ssl->major_ver )
marcozecchini	0:9fca2b23d0ba	3503	{
marcozecchini	0:9fca2b23d0ba	3504	MBEDTLS_SSL_DEBUG_MSG( 1, ( "major version mismatch" ) );
marcozecchini	0:9fca2b23d0ba	3505	return( MBEDTLS_ERR_SSL_INVALID_RECORD );
marcozecchini	0:9fca2b23d0ba	3506	}
marcozecchini	0:9fca2b23d0ba	3507
marcozecchini	0:9fca2b23d0ba	3508	if( minor_ver > ssl->conf->max_minor_ver )
marcozecchini	0:9fca2b23d0ba	3509	{
marcozecchini	0:9fca2b23d0ba	3510	MBEDTLS_SSL_DEBUG_MSG( 1, ( "minor version mismatch" ) );
marcozecchini	0:9fca2b23d0ba	3511	return( MBEDTLS_ERR_SSL_INVALID_RECORD );
marcozecchini	0:9fca2b23d0ba	3512	}
marcozecchini	0:9fca2b23d0ba	3513
marcozecchini	0:9fca2b23d0ba	3514	/* Check length against the size of our buffer */
marcozecchini	0:9fca2b23d0ba	3515	if( ssl->in_msglen > MBEDTLS_SSL_BUFFER_LEN
marcozecchini	0:9fca2b23d0ba	3516	- (size_t)( ssl->in_msg - ssl->in_buf ) )
marcozecchini	0:9fca2b23d0ba	3517	{
marcozecchini	0:9fca2b23d0ba	3518	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad message length" ) );
marcozecchini	0:9fca2b23d0ba	3519	return( MBEDTLS_ERR_SSL_INVALID_RECORD );
marcozecchini	0:9fca2b23d0ba	3520	}
marcozecchini	0:9fca2b23d0ba	3521
marcozecchini	0:9fca2b23d0ba	3522	/* Check length against bounds of the current transform and version */
marcozecchini	0:9fca2b23d0ba	3523	if( ssl->transform_in == NULL )
marcozecchini	0:9fca2b23d0ba	3524	{
marcozecchini	0:9fca2b23d0ba	3525	if( ssl->in_msglen < 1 \|\|
marcozecchini	0:9fca2b23d0ba	3526	ssl->in_msglen > MBEDTLS_SSL_MAX_CONTENT_LEN )
marcozecchini	0:9fca2b23d0ba	3527	{
marcozecchini	0:9fca2b23d0ba	3528	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad message length" ) );
marcozecchini	0:9fca2b23d0ba	3529	return( MBEDTLS_ERR_SSL_INVALID_RECORD );
marcozecchini	0:9fca2b23d0ba	3530	}
marcozecchini	0:9fca2b23d0ba	3531	}
marcozecchini	0:9fca2b23d0ba	3532	else
marcozecchini	0:9fca2b23d0ba	3533	{
marcozecchini	0:9fca2b23d0ba	3534	if( ssl->in_msglen < ssl->transform_in->minlen )
marcozecchini	0:9fca2b23d0ba	3535	{
marcozecchini	0:9fca2b23d0ba	3536	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad message length" ) );
marcozecchini	0:9fca2b23d0ba	3537	return( MBEDTLS_ERR_SSL_INVALID_RECORD );
marcozecchini	0:9fca2b23d0ba	3538	}
marcozecchini	0:9fca2b23d0ba	3539
marcozecchini	0:9fca2b23d0ba	3540	#if defined(MBEDTLS_SSL_PROTO_SSL3)
marcozecchini	0:9fca2b23d0ba	3541	if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 &&
marcozecchini	0:9fca2b23d0ba	3542	ssl->in_msglen > ssl->transform_in->minlen + MBEDTLS_SSL_MAX_CONTENT_LEN )
marcozecchini	0:9fca2b23d0ba	3543	{
marcozecchini	0:9fca2b23d0ba	3544	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad message length" ) );
marcozecchini	0:9fca2b23d0ba	3545	return( MBEDTLS_ERR_SSL_INVALID_RECORD );
marcozecchini	0:9fca2b23d0ba	3546	}
marcozecchini	0:9fca2b23d0ba	3547	#endif
marcozecchini	0:9fca2b23d0ba	3548	#if defined(MBEDTLS_SSL_PROTO_TLS1) \|\| defined(MBEDTLS_SSL_PROTO_TLS1_1) \|\| \
marcozecchini	0:9fca2b23d0ba	3549	defined(MBEDTLS_SSL_PROTO_TLS1_2)
marcozecchini	0:9fca2b23d0ba	3550	/*
marcozecchini	0:9fca2b23d0ba	3551	* TLS encrypted messages can have up to 256 bytes of padding
marcozecchini	0:9fca2b23d0ba	3552	*/
marcozecchini	0:9fca2b23d0ba	3553	if( ssl->minor_ver >= MBEDTLS_SSL_MINOR_VERSION_1 &&
marcozecchini	0:9fca2b23d0ba	3554	ssl->in_msglen > ssl->transform_in->minlen +
marcozecchini	0:9fca2b23d0ba	3555	MBEDTLS_SSL_MAX_CONTENT_LEN + 256 )
marcozecchini	0:9fca2b23d0ba	3556	{
marcozecchini	0:9fca2b23d0ba	3557	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad message length" ) );
marcozecchini	0:9fca2b23d0ba	3558	return( MBEDTLS_ERR_SSL_INVALID_RECORD );
marcozecchini	0:9fca2b23d0ba	3559	}
marcozecchini	0:9fca2b23d0ba	3560	#endif
marcozecchini	0:9fca2b23d0ba	3561	}
marcozecchini	0:9fca2b23d0ba	3562
marcozecchini	0:9fca2b23d0ba	3563	/*
marcozecchini	0:9fca2b23d0ba	3564	* DTLS-related tests done last, because most of them may result in
marcozecchini	0:9fca2b23d0ba	3565	* silently dropping the record (but not the whole datagram), and we only
marcozecchini	0:9fca2b23d0ba	3566	* want to consider that after ensuring that the "basic" fields (type,
marcozecchini	0:9fca2b23d0ba	3567	* version, length) are sane.
marcozecchini	0:9fca2b23d0ba	3568	*/
marcozecchini	0:9fca2b23d0ba	3569	#if defined(MBEDTLS_SSL_PROTO_DTLS)
marcozecchini	0:9fca2b23d0ba	3570	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
marcozecchini	0:9fca2b23d0ba	3571	{
marcozecchini	0:9fca2b23d0ba	3572	unsigned int rec_epoch = ( ssl->in_ctr[0] << 8 ) \| ssl->in_ctr[1];
marcozecchini	0:9fca2b23d0ba	3573
marcozecchini	0:9fca2b23d0ba	3574	/* Drop unexpected ChangeCipherSpec messages */
marcozecchini	0:9fca2b23d0ba	3575	if( ssl->in_msgtype == MBEDTLS_SSL_MSG_CHANGE_CIPHER_SPEC &&
marcozecchini	0:9fca2b23d0ba	3576	ssl->state != MBEDTLS_SSL_CLIENT_CHANGE_CIPHER_SPEC &&
marcozecchini	0:9fca2b23d0ba	3577	ssl->state != MBEDTLS_SSL_SERVER_CHANGE_CIPHER_SPEC )
marcozecchini	0:9fca2b23d0ba	3578	{
marcozecchini	0:9fca2b23d0ba	3579	MBEDTLS_SSL_DEBUG_MSG( 1, ( "dropping unexpected ChangeCipherSpec" ) );
marcozecchini	0:9fca2b23d0ba	3580	return( MBEDTLS_ERR_SSL_UNEXPECTED_RECORD );
marcozecchini	0:9fca2b23d0ba	3581	}
marcozecchini	0:9fca2b23d0ba	3582
marcozecchini	0:9fca2b23d0ba	3583	/* Drop unexpected ApplicationData records,
marcozecchini	0:9fca2b23d0ba	3584	* except at the beginning of renegotiations */
marcozecchini	0:9fca2b23d0ba	3585	if( ssl->in_msgtype == MBEDTLS_SSL_MSG_APPLICATION_DATA &&
marcozecchini	0:9fca2b23d0ba	3586	ssl->state != MBEDTLS_SSL_HANDSHAKE_OVER
marcozecchini	0:9fca2b23d0ba	3587	#if defined(MBEDTLS_SSL_RENEGOTIATION)
marcozecchini	0:9fca2b23d0ba	3588	&& ! ( ssl->renego_status == MBEDTLS_SSL_RENEGOTIATION_IN_PROGRESS &&
marcozecchini	0:9fca2b23d0ba	3589	ssl->state == MBEDTLS_SSL_SERVER_HELLO )
marcozecchini	0:9fca2b23d0ba	3590	#endif
marcozecchini	0:9fca2b23d0ba	3591	)
marcozecchini	0:9fca2b23d0ba	3592	{
marcozecchini	0:9fca2b23d0ba	3593	MBEDTLS_SSL_DEBUG_MSG( 1, ( "dropping unexpected ApplicationData" ) );
marcozecchini	0:9fca2b23d0ba	3594	return( MBEDTLS_ERR_SSL_UNEXPECTED_RECORD );
marcozecchini	0:9fca2b23d0ba	3595	}
marcozecchini	0:9fca2b23d0ba	3596
marcozecchini	0:9fca2b23d0ba	3597	/* Check epoch (and sequence number) with DTLS */
marcozecchini	0:9fca2b23d0ba	3598	if( rec_epoch != ssl->in_epoch )
marcozecchini	0:9fca2b23d0ba	3599	{
marcozecchini	0:9fca2b23d0ba	3600	MBEDTLS_SSL_DEBUG_MSG( 1, ( "record from another epoch: "
marcozecchini	0:9fca2b23d0ba	3601	"expected %d, received %d",
marcozecchini	0:9fca2b23d0ba	3602	ssl->in_epoch, rec_epoch ) );
marcozecchini	0:9fca2b23d0ba	3603
marcozecchini	0:9fca2b23d0ba	3604	#if defined(MBEDTLS_SSL_DTLS_CLIENT_PORT_REUSE) && defined(MBEDTLS_SSL_SRV_C)
marcozecchini	0:9fca2b23d0ba	3605	/*
marcozecchini	0:9fca2b23d0ba	3606	* Check for an epoch 0 ClientHello. We can't use in_msg here to
marcozecchini	0:9fca2b23d0ba	3607	* access the first byte of record content (handshake type), as we
marcozecchini	0:9fca2b23d0ba	3608	* have an active transform (possibly iv_len != 0), so use the
marcozecchini	0:9fca2b23d0ba	3609	* fact that the record header len is 13 instead.
marcozecchini	0:9fca2b23d0ba	3610	*/
marcozecchini	0:9fca2b23d0ba	3611	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER &&
marcozecchini	0:9fca2b23d0ba	3612	ssl->state == MBEDTLS_SSL_HANDSHAKE_OVER &&
marcozecchini	0:9fca2b23d0ba	3613	rec_epoch == 0 &&
marcozecchini	0:9fca2b23d0ba	3614	ssl->in_msgtype == MBEDTLS_SSL_MSG_HANDSHAKE &&
marcozecchini	0:9fca2b23d0ba	3615	ssl->in_left > 13 &&
marcozecchini	0:9fca2b23d0ba	3616	ssl->in_buf[13] == MBEDTLS_SSL_HS_CLIENT_HELLO )
marcozecchini	0:9fca2b23d0ba	3617	{
marcozecchini	0:9fca2b23d0ba	3618	MBEDTLS_SSL_DEBUG_MSG( 1, ( "possible client reconnect "
marcozecchini	0:9fca2b23d0ba	3619	"from the same port" ) );
marcozecchini	0:9fca2b23d0ba	3620	return( ssl_handle_possible_reconnect( ssl ) );
marcozecchini	0:9fca2b23d0ba	3621	}
marcozecchini	0:9fca2b23d0ba	3622	else
marcozecchini	0:9fca2b23d0ba	3623	#endif /* MBEDTLS_SSL_DTLS_CLIENT_PORT_REUSE && MBEDTLS_SSL_SRV_C */
marcozecchini	0:9fca2b23d0ba	3624	return( MBEDTLS_ERR_SSL_UNEXPECTED_RECORD );
marcozecchini	0:9fca2b23d0ba	3625	}
marcozecchini	0:9fca2b23d0ba	3626
marcozecchini	0:9fca2b23d0ba	3627	#if defined(MBEDTLS_SSL_DTLS_ANTI_REPLAY)
marcozecchini	0:9fca2b23d0ba	3628	/* Replay detection only works for the current epoch */
marcozecchini	0:9fca2b23d0ba	3629	if( rec_epoch == ssl->in_epoch &&
marcozecchini	0:9fca2b23d0ba	3630	mbedtls_ssl_dtls_replay_check( ssl ) != 0 )
marcozecchini	0:9fca2b23d0ba	3631	{
marcozecchini	0:9fca2b23d0ba	3632	MBEDTLS_SSL_DEBUG_MSG( 1, ( "replayed record" ) );
marcozecchini	0:9fca2b23d0ba	3633	return( MBEDTLS_ERR_SSL_UNEXPECTED_RECORD );
marcozecchini	0:9fca2b23d0ba	3634	}
marcozecchini	0:9fca2b23d0ba	3635	#endif
marcozecchini	0:9fca2b23d0ba	3636	}
marcozecchini	0:9fca2b23d0ba	3637	#endif /* MBEDTLS_SSL_PROTO_DTLS */
marcozecchini	0:9fca2b23d0ba	3638
marcozecchini	0:9fca2b23d0ba	3639	return( 0 );
marcozecchini	0:9fca2b23d0ba	3640	}
marcozecchini	0:9fca2b23d0ba	3641
marcozecchini	0:9fca2b23d0ba	3642	/*
marcozecchini	0:9fca2b23d0ba	3643	* If applicable, decrypt (and decompress) record content
marcozecchini	0:9fca2b23d0ba	3644	*/
marcozecchini	0:9fca2b23d0ba	3645	static int ssl_prepare_record_content( mbedtls_ssl_context *ssl )
marcozecchini	0:9fca2b23d0ba	3646	{
marcozecchini	0:9fca2b23d0ba	3647	int ret, done = 0;
marcozecchini	0:9fca2b23d0ba	3648
marcozecchini	0:9fca2b23d0ba	3649	MBEDTLS_SSL_DEBUG_BUF( 4, "input record from network",
marcozecchini	0:9fca2b23d0ba	3650	ssl->in_hdr, mbedtls_ssl_hdr_len( ssl ) + ssl->in_msglen );
marcozecchini	0:9fca2b23d0ba	3651
marcozecchini	0:9fca2b23d0ba	3652	#if defined(MBEDTLS_SSL_HW_RECORD_ACCEL)
marcozecchini	0:9fca2b23d0ba	3653	if( mbedtls_ssl_hw_record_read != NULL )
marcozecchini	0:9fca2b23d0ba	3654	{
marcozecchini	0:9fca2b23d0ba	3655	MBEDTLS_SSL_DEBUG_MSG( 2, ( "going for mbedtls_ssl_hw_record_read()" ) );
marcozecchini	0:9fca2b23d0ba	3656
marcozecchini	0:9fca2b23d0ba	3657	ret = mbedtls_ssl_hw_record_read( ssl );
marcozecchini	0:9fca2b23d0ba	3658	if( ret != 0 && ret != MBEDTLS_ERR_SSL_HW_ACCEL_FALLTHROUGH )
marcozecchini	0:9fca2b23d0ba	3659	{
marcozecchini	0:9fca2b23d0ba	3660	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_hw_record_read", ret );
marcozecchini	0:9fca2b23d0ba	3661	return( MBEDTLS_ERR_SSL_HW_ACCEL_FAILED );
marcozecchini	0:9fca2b23d0ba	3662	}
marcozecchini	0:9fca2b23d0ba	3663
marcozecchini	0:9fca2b23d0ba	3664	if( ret == 0 )
marcozecchini	0:9fca2b23d0ba	3665	done = 1;
marcozecchini	0:9fca2b23d0ba	3666	}
marcozecchini	0:9fca2b23d0ba	3667	#endif /* MBEDTLS_SSL_HW_RECORD_ACCEL */
marcozecchini	0:9fca2b23d0ba	3668	if( !done && ssl->transform_in != NULL )
marcozecchini	0:9fca2b23d0ba	3669	{
marcozecchini	0:9fca2b23d0ba	3670	if( ( ret = ssl_decrypt_buf( ssl ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	3671	{
marcozecchini	0:9fca2b23d0ba	3672	MBEDTLS_SSL_DEBUG_RET( 1, "ssl_decrypt_buf", ret );
marcozecchini	0:9fca2b23d0ba	3673	return( ret );
marcozecchini	0:9fca2b23d0ba	3674	}
marcozecchini	0:9fca2b23d0ba	3675
marcozecchini	0:9fca2b23d0ba	3676	MBEDTLS_SSL_DEBUG_BUF( 4, "input payload after decrypt",
marcozecchini	0:9fca2b23d0ba	3677	ssl->in_msg, ssl->in_msglen );
marcozecchini	0:9fca2b23d0ba	3678
marcozecchini	0:9fca2b23d0ba	3679	if( ssl->in_msglen > MBEDTLS_SSL_MAX_CONTENT_LEN )
marcozecchini	0:9fca2b23d0ba	3680	{
marcozecchini	0:9fca2b23d0ba	3681	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad message length" ) );
marcozecchini	0:9fca2b23d0ba	3682	return( MBEDTLS_ERR_SSL_INVALID_RECORD );
marcozecchini	0:9fca2b23d0ba	3683	}
marcozecchini	0:9fca2b23d0ba	3684	}
marcozecchini	0:9fca2b23d0ba	3685
marcozecchini	0:9fca2b23d0ba	3686	#if defined(MBEDTLS_ZLIB_SUPPORT)
marcozecchini	0:9fca2b23d0ba	3687	if( ssl->transform_in != NULL &&
marcozecchini	0:9fca2b23d0ba	3688	ssl->session_in->compression == MBEDTLS_SSL_COMPRESS_DEFLATE )
marcozecchini	0:9fca2b23d0ba	3689	{
marcozecchini	0:9fca2b23d0ba	3690	if( ( ret = ssl_decompress_buf( ssl ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	3691	{
marcozecchini	0:9fca2b23d0ba	3692	MBEDTLS_SSL_DEBUG_RET( 1, "ssl_decompress_buf", ret );
marcozecchini	0:9fca2b23d0ba	3693	return( ret );
marcozecchini	0:9fca2b23d0ba	3694	}
marcozecchini	0:9fca2b23d0ba	3695	}
marcozecchini	0:9fca2b23d0ba	3696	#endif /* MBEDTLS_ZLIB_SUPPORT */
marcozecchini	0:9fca2b23d0ba	3697
marcozecchini	0:9fca2b23d0ba	3698	#if defined(MBEDTLS_SSL_DTLS_ANTI_REPLAY)
marcozecchini	0:9fca2b23d0ba	3699	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
marcozecchini	0:9fca2b23d0ba	3700	{
marcozecchini	0:9fca2b23d0ba	3701	mbedtls_ssl_dtls_replay_update( ssl );
marcozecchini	0:9fca2b23d0ba	3702	}
marcozecchini	0:9fca2b23d0ba	3703	#endif
marcozecchini	0:9fca2b23d0ba	3704
marcozecchini	0:9fca2b23d0ba	3705	return( 0 );
marcozecchini	0:9fca2b23d0ba	3706	}
marcozecchini	0:9fca2b23d0ba	3707
marcozecchini	0:9fca2b23d0ba	3708	static void ssl_handshake_wrapup_free_hs_transform( mbedtls_ssl_context *ssl );
marcozecchini	0:9fca2b23d0ba	3709
marcozecchini	0:9fca2b23d0ba	3710	/*
marcozecchini	0:9fca2b23d0ba	3711	* Read a record.
marcozecchini	0:9fca2b23d0ba	3712	*
marcozecchini	0:9fca2b23d0ba	3713	* Silently ignore non-fatal alert (and for DTLS, invalid records as well,
marcozecchini	0:9fca2b23d0ba	3714	* RFC 6347 4.1.2.7) and continue reading until a valid record is found.
marcozecchini	0:9fca2b23d0ba	3715	*
marcozecchini	0:9fca2b23d0ba	3716	*/
marcozecchini	0:9fca2b23d0ba	3717	int mbedtls_ssl_read_record( mbedtls_ssl_context *ssl )
marcozecchini	0:9fca2b23d0ba	3718	{
marcozecchini	0:9fca2b23d0ba	3719	int ret;
marcozecchini	0:9fca2b23d0ba	3720
marcozecchini	0:9fca2b23d0ba	3721	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> read record" ) );
marcozecchini	0:9fca2b23d0ba	3722
marcozecchini	0:9fca2b23d0ba	3723	if( ssl->keep_current_message == 0 )
marcozecchini	0:9fca2b23d0ba	3724	{
marcozecchini	0:9fca2b23d0ba	3725	do {
marcozecchini	0:9fca2b23d0ba	3726
marcozecchini	0:9fca2b23d0ba	3727	if( ( ret = mbedtls_ssl_read_record_layer( ssl ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	3728	{
marcozecchini	0:9fca2b23d0ba	3729	MBEDTLS_SSL_DEBUG_RET( 1, ( "mbedtls_ssl_read_record_layer" ), ret );
marcozecchini	0:9fca2b23d0ba	3730	return( ret );
marcozecchini	0:9fca2b23d0ba	3731	}
marcozecchini	0:9fca2b23d0ba	3732
marcozecchini	0:9fca2b23d0ba	3733	ret = mbedtls_ssl_handle_message_type( ssl );
marcozecchini	0:9fca2b23d0ba	3734
marcozecchini	0:9fca2b23d0ba	3735	} while( MBEDTLS_ERR_SSL_NON_FATAL == ret );
marcozecchini	0:9fca2b23d0ba	3736
marcozecchini	0:9fca2b23d0ba	3737	if( 0 != ret )
marcozecchini	0:9fca2b23d0ba	3738	{
marcozecchini	0:9fca2b23d0ba	3739	MBEDTLS_SSL_DEBUG_RET( 1, ( "mbedtls_ssl_read_record_layer" ), ret );
marcozecchini	0:9fca2b23d0ba	3740	return( ret );
marcozecchini	0:9fca2b23d0ba	3741	}
marcozecchini	0:9fca2b23d0ba	3742
marcozecchini	0:9fca2b23d0ba	3743	if( ssl->in_msgtype == MBEDTLS_SSL_MSG_HANDSHAKE )
marcozecchini	0:9fca2b23d0ba	3744	{
marcozecchini	0:9fca2b23d0ba	3745	mbedtls_ssl_update_handshake_status( ssl );
marcozecchini	0:9fca2b23d0ba	3746	}
marcozecchini	0:9fca2b23d0ba	3747	}
marcozecchini	0:9fca2b23d0ba	3748	else
marcozecchini	0:9fca2b23d0ba	3749	{
marcozecchini	0:9fca2b23d0ba	3750	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= reuse previously read message" ) );
marcozecchini	0:9fca2b23d0ba	3751	ssl->keep_current_message = 0;
marcozecchini	0:9fca2b23d0ba	3752	}
marcozecchini	0:9fca2b23d0ba	3753
marcozecchini	0:9fca2b23d0ba	3754	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= read record" ) );
marcozecchini	0:9fca2b23d0ba	3755
marcozecchini	0:9fca2b23d0ba	3756	return( 0 );
marcozecchini	0:9fca2b23d0ba	3757	}
marcozecchini	0:9fca2b23d0ba	3758
marcozecchini	0:9fca2b23d0ba	3759	int mbedtls_ssl_read_record_layer( mbedtls_ssl_context *ssl )
marcozecchini	0:9fca2b23d0ba	3760	{
marcozecchini	0:9fca2b23d0ba	3761	int ret;
marcozecchini	0:9fca2b23d0ba	3762
marcozecchini	0:9fca2b23d0ba	3763	/*
marcozecchini	0:9fca2b23d0ba	3764	* Step A
marcozecchini	0:9fca2b23d0ba	3765	*
marcozecchini	0:9fca2b23d0ba	3766	* Consume last content-layer message and potentially
marcozecchini	0:9fca2b23d0ba	3767	* update in_msglen which keeps track of the contents'
marcozecchini	0:9fca2b23d0ba	3768	* consumption state.
marcozecchini	0:9fca2b23d0ba	3769	*
marcozecchini	0:9fca2b23d0ba	3770	* (1) Handshake messages:
marcozecchini	0:9fca2b23d0ba	3771	* Remove last handshake message, move content
marcozecchini	0:9fca2b23d0ba	3772	* and adapt in_msglen.
marcozecchini	0:9fca2b23d0ba	3773	*
marcozecchini	0:9fca2b23d0ba	3774	* (2) Alert messages:
marcozecchini	0:9fca2b23d0ba	3775	* Consume whole record content, in_msglen = 0.
marcozecchini	0:9fca2b23d0ba	3776	*
marcozecchini	0:9fca2b23d0ba	3777	* NOTE: This needs to be fixed, since like for
marcozecchini	0:9fca2b23d0ba	3778	* handshake messages it is allowed to have
marcozecchini	0:9fca2b23d0ba	3779	* multiple alerts witin a single record.
marcozecchini	0:9fca2b23d0ba	3780	* Internal reference IOTSSL-1321.
marcozecchini	0:9fca2b23d0ba	3781	*
marcozecchini	0:9fca2b23d0ba	3782	* (3) Change cipher spec:
marcozecchini	0:9fca2b23d0ba	3783	* Consume whole record content, in_msglen = 0.
marcozecchini	0:9fca2b23d0ba	3784	*
marcozecchini	0:9fca2b23d0ba	3785	* (4) Application data:
marcozecchini	0:9fca2b23d0ba	3786	* Don't do anything - the record layer provides
marcozecchini	0:9fca2b23d0ba	3787	* the application data as a stream transport
marcozecchini	0:9fca2b23d0ba	3788	* and consumes through mbedtls_ssl_read only.
marcozecchini	0:9fca2b23d0ba	3789	*
marcozecchini	0:9fca2b23d0ba	3790	*/
marcozecchini	0:9fca2b23d0ba	3791
marcozecchini	0:9fca2b23d0ba	3792	/* Case (1): Handshake messages */
marcozecchini	0:9fca2b23d0ba	3793	if( ssl->in_hslen != 0 )
marcozecchini	0:9fca2b23d0ba	3794	{
marcozecchini	0:9fca2b23d0ba	3795	/* Hard assertion to be sure that no application data
marcozecchini	0:9fca2b23d0ba	3796	* is in flight, as corrupting ssl->in_msglen during
marcozecchini	0:9fca2b23d0ba	3797	* ssl->in_offt != NULL is fatal. */
marcozecchini	0:9fca2b23d0ba	3798	if( ssl->in_offt != NULL )
marcozecchini	0:9fca2b23d0ba	3799	{
marcozecchini	0:9fca2b23d0ba	3800	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
marcozecchini	0:9fca2b23d0ba	3801	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
marcozecchini	0:9fca2b23d0ba	3802	}
marcozecchini	0:9fca2b23d0ba	3803
marcozecchini	0:9fca2b23d0ba	3804	/*
marcozecchini	0:9fca2b23d0ba	3805	* Get next Handshake message in the current record
marcozecchini	0:9fca2b23d0ba	3806	*/
marcozecchini	0:9fca2b23d0ba	3807
marcozecchini	0:9fca2b23d0ba	3808	/* Notes:
marcozecchini	0:9fca2b23d0ba	3809	* (1) in_hslen is NOT necessarily the size of the
marcozecchini	0:9fca2b23d0ba	3810	* current handshake content: If DTLS handshake
marcozecchini	0:9fca2b23d0ba	3811	* fragmentation is used, that's the fragment
marcozecchini	0:9fca2b23d0ba	3812	* size instead. Using the total handshake message
marcozecchini	0:9fca2b23d0ba	3813	* size here is FAULTY and should be changed at
marcozecchini	0:9fca2b23d0ba	3814	* some point. Internal reference IOTSSL-1414.
marcozecchini	0:9fca2b23d0ba	3815	* (2) While it doesn't seem to cause problems, one
marcozecchini	0:9fca2b23d0ba	3816	* has to be very careful not to assume that in_hslen
marcozecchini	0:9fca2b23d0ba	3817	* is always <= in_msglen in a sensible communication.
marcozecchini	0:9fca2b23d0ba	3818	* Again, it's wrong for DTLS handshake fragmentation.
marcozecchini	0:9fca2b23d0ba	3819	* The following check is therefore mandatory, and
marcozecchini	0:9fca2b23d0ba	3820	* should not be treated as a silently corrected assertion.
marcozecchini	0:9fca2b23d0ba	3821	* Additionally, ssl->in_hslen might be arbitrarily out of
marcozecchini	0:9fca2b23d0ba	3822	* bounds after handling a DTLS message with an unexpected
marcozecchini	0:9fca2b23d0ba	3823	* sequence number, see mbedtls_ssl_prepare_handshake_record.
marcozecchini	0:9fca2b23d0ba	3824	*/
marcozecchini	0:9fca2b23d0ba	3825	if( ssl->in_hslen < ssl->in_msglen )
marcozecchini	0:9fca2b23d0ba	3826	{
marcozecchini	0:9fca2b23d0ba	3827	ssl->in_msglen -= ssl->in_hslen;
marcozecchini	0:9fca2b23d0ba	3828	memmove( ssl->in_msg, ssl->in_msg + ssl->in_hslen,
marcozecchini	0:9fca2b23d0ba	3829	ssl->in_msglen );
marcozecchini	0:9fca2b23d0ba	3830
marcozecchini	0:9fca2b23d0ba	3831	MBEDTLS_SSL_DEBUG_BUF( 4, "remaining content in record",
marcozecchini	0:9fca2b23d0ba	3832	ssl->in_msg, ssl->in_msglen );
marcozecchini	0:9fca2b23d0ba	3833	}
marcozecchini	0:9fca2b23d0ba	3834	else
marcozecchini	0:9fca2b23d0ba	3835	{
marcozecchini	0:9fca2b23d0ba	3836	ssl->in_msglen = 0;
marcozecchini	0:9fca2b23d0ba	3837	}
marcozecchini	0:9fca2b23d0ba	3838
marcozecchini	0:9fca2b23d0ba	3839	ssl->in_hslen = 0;
marcozecchini	0:9fca2b23d0ba	3840	}
marcozecchini	0:9fca2b23d0ba	3841	/* Case (4): Application data */
marcozecchini	0:9fca2b23d0ba	3842	else if( ssl->in_offt != NULL )
marcozecchini	0:9fca2b23d0ba	3843	{
marcozecchini	0:9fca2b23d0ba	3844	return( 0 );
marcozecchini	0:9fca2b23d0ba	3845	}
marcozecchini	0:9fca2b23d0ba	3846	/* Everything else (CCS & Alerts) */
marcozecchini	0:9fca2b23d0ba	3847	else
marcozecchini	0:9fca2b23d0ba	3848	{
marcozecchini	0:9fca2b23d0ba	3849	ssl->in_msglen = 0;
marcozecchini	0:9fca2b23d0ba	3850	}
marcozecchini	0:9fca2b23d0ba	3851
marcozecchini	0:9fca2b23d0ba	3852	/*
marcozecchini	0:9fca2b23d0ba	3853	* Step B
marcozecchini	0:9fca2b23d0ba	3854	*
marcozecchini	0:9fca2b23d0ba	3855	* Fetch and decode new record if current one is fully consumed.
marcozecchini	0:9fca2b23d0ba	3856	*
marcozecchini	0:9fca2b23d0ba	3857	*/
marcozecchini	0:9fca2b23d0ba	3858
marcozecchini	0:9fca2b23d0ba	3859	if( ssl->in_msglen > 0 )
marcozecchini	0:9fca2b23d0ba	3860	{
marcozecchini	0:9fca2b23d0ba	3861	/* There's something left to be processed in the current record. */
marcozecchini	0:9fca2b23d0ba	3862	return( 0 );
marcozecchini	0:9fca2b23d0ba	3863	}
marcozecchini	0:9fca2b23d0ba	3864
marcozecchini	0:9fca2b23d0ba	3865	/* Need to fetch a new record */
marcozecchini	0:9fca2b23d0ba	3866
marcozecchini	0:9fca2b23d0ba	3867	#if defined(MBEDTLS_SSL_PROTO_DTLS)
marcozecchini	0:9fca2b23d0ba	3868	read_record_header:
marcozecchini	0:9fca2b23d0ba	3869	#endif
marcozecchini	0:9fca2b23d0ba	3870
marcozecchini	0:9fca2b23d0ba	3871	/* Current record either fully processed or to be discarded. */
marcozecchini	0:9fca2b23d0ba	3872
marcozecchini	0:9fca2b23d0ba	3873	if( ( ret = mbedtls_ssl_fetch_input( ssl, mbedtls_ssl_hdr_len( ssl ) ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	3874	{
marcozecchini	0:9fca2b23d0ba	3875	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_fetch_input", ret );
marcozecchini	0:9fca2b23d0ba	3876	return( ret );
marcozecchini	0:9fca2b23d0ba	3877	}
marcozecchini	0:9fca2b23d0ba	3878
marcozecchini	0:9fca2b23d0ba	3879	if( ( ret = ssl_parse_record_header( ssl ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	3880	{
marcozecchini	0:9fca2b23d0ba	3881	#if defined(MBEDTLS_SSL_PROTO_DTLS)
marcozecchini	0:9fca2b23d0ba	3882	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM &&
marcozecchini	0:9fca2b23d0ba	3883	ret != MBEDTLS_ERR_SSL_CLIENT_RECONNECT )
marcozecchini	0:9fca2b23d0ba	3884	{
marcozecchini	0:9fca2b23d0ba	3885	if( ret == MBEDTLS_ERR_SSL_UNEXPECTED_RECORD )
marcozecchini	0:9fca2b23d0ba	3886	{
marcozecchini	0:9fca2b23d0ba	3887	/* Skip unexpected record (but not whole datagram) */
marcozecchini	0:9fca2b23d0ba	3888	ssl->next_record_offset = ssl->in_msglen
marcozecchini	0:9fca2b23d0ba	3889	+ mbedtls_ssl_hdr_len( ssl );
marcozecchini	0:9fca2b23d0ba	3890
marcozecchini	0:9fca2b23d0ba	3891	MBEDTLS_SSL_DEBUG_MSG( 1, ( "discarding unexpected record "
marcozecchini	0:9fca2b23d0ba	3892	"(header)" ) );
marcozecchini	0:9fca2b23d0ba	3893	}
marcozecchini	0:9fca2b23d0ba	3894	else
marcozecchini	0:9fca2b23d0ba	3895	{
marcozecchini	0:9fca2b23d0ba	3896	/* Skip invalid record and the rest of the datagram */
marcozecchini	0:9fca2b23d0ba	3897	ssl->next_record_offset = 0;
marcozecchini	0:9fca2b23d0ba	3898	ssl->in_left = 0;
marcozecchini	0:9fca2b23d0ba	3899
marcozecchini	0:9fca2b23d0ba	3900	MBEDTLS_SSL_DEBUG_MSG( 1, ( "discarding invalid record "
marcozecchini	0:9fca2b23d0ba	3901	"(header)" ) );
marcozecchini	0:9fca2b23d0ba	3902	}
marcozecchini	0:9fca2b23d0ba	3903
marcozecchini	0:9fca2b23d0ba	3904	/* Get next record */
marcozecchini	0:9fca2b23d0ba	3905	goto read_record_header;
marcozecchini	0:9fca2b23d0ba	3906	}
marcozecchini	0:9fca2b23d0ba	3907	#endif
marcozecchini	0:9fca2b23d0ba	3908	return( ret );
marcozecchini	0:9fca2b23d0ba	3909	}
marcozecchini	0:9fca2b23d0ba	3910
marcozecchini	0:9fca2b23d0ba	3911	/*
marcozecchini	0:9fca2b23d0ba	3912	* Read and optionally decrypt the message contents
marcozecchini	0:9fca2b23d0ba	3913	*/
marcozecchini	0:9fca2b23d0ba	3914	if( ( ret = mbedtls_ssl_fetch_input( ssl,
marcozecchini	0:9fca2b23d0ba	3915	mbedtls_ssl_hdr_len( ssl ) + ssl->in_msglen ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	3916	{
marcozecchini	0:9fca2b23d0ba	3917	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_fetch_input", ret );
marcozecchini	0:9fca2b23d0ba	3918	return( ret );
marcozecchini	0:9fca2b23d0ba	3919	}
marcozecchini	0:9fca2b23d0ba	3920
marcozecchini	0:9fca2b23d0ba	3921	/* Done reading this record, get ready for the next one */
marcozecchini	0:9fca2b23d0ba	3922	#if defined(MBEDTLS_SSL_PROTO_DTLS)
marcozecchini	0:9fca2b23d0ba	3923	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
marcozecchini	0:9fca2b23d0ba	3924	ssl->next_record_offset = ssl->in_msglen + mbedtls_ssl_hdr_len( ssl );
marcozecchini	0:9fca2b23d0ba	3925	else
marcozecchini	0:9fca2b23d0ba	3926	#endif
marcozecchini	0:9fca2b23d0ba	3927	ssl->in_left = 0;
marcozecchini	0:9fca2b23d0ba	3928
marcozecchini	0:9fca2b23d0ba	3929	if( ( ret = ssl_prepare_record_content( ssl ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	3930	{
marcozecchini	0:9fca2b23d0ba	3931	#if defined(MBEDTLS_SSL_PROTO_DTLS)
marcozecchini	0:9fca2b23d0ba	3932	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
marcozecchini	0:9fca2b23d0ba	3933	{
marcozecchini	0:9fca2b23d0ba	3934	/* Silently discard invalid records */
marcozecchini	0:9fca2b23d0ba	3935	if( ret == MBEDTLS_ERR_SSL_INVALID_RECORD \|\|
marcozecchini	0:9fca2b23d0ba	3936	ret == MBEDTLS_ERR_SSL_INVALID_MAC )
marcozecchini	0:9fca2b23d0ba	3937	{
marcozecchini	0:9fca2b23d0ba	3938	/* Except when waiting for Finished as a bad mac here
marcozecchini	0:9fca2b23d0ba	3939	* probably means something went wrong in the handshake
marcozecchini	0:9fca2b23d0ba	3940	* (eg wrong psk used, mitm downgrade attempt, etc.) */
marcozecchini	0:9fca2b23d0ba	3941	if( ssl->state == MBEDTLS_SSL_CLIENT_FINISHED \|\|
marcozecchini	0:9fca2b23d0ba	3942	ssl->state == MBEDTLS_SSL_SERVER_FINISHED )
marcozecchini	0:9fca2b23d0ba	3943	{
marcozecchini	0:9fca2b23d0ba	3944	#if defined(MBEDTLS_SSL_ALL_ALERT_MESSAGES)
marcozecchini	0:9fca2b23d0ba	3945	if( ret == MBEDTLS_ERR_SSL_INVALID_MAC )
marcozecchini	0:9fca2b23d0ba	3946	{
marcozecchini	0:9fca2b23d0ba	3947	mbedtls_ssl_send_alert_message( ssl,
marcozecchini	0:9fca2b23d0ba	3948	MBEDTLS_SSL_ALERT_LEVEL_FATAL,
marcozecchini	0:9fca2b23d0ba	3949	MBEDTLS_SSL_ALERT_MSG_BAD_RECORD_MAC );
marcozecchini	0:9fca2b23d0ba	3950	}
marcozecchini	0:9fca2b23d0ba	3951	#endif
marcozecchini	0:9fca2b23d0ba	3952	return( ret );
marcozecchini	0:9fca2b23d0ba	3953	}
marcozecchini	0:9fca2b23d0ba	3954
marcozecchini	0:9fca2b23d0ba	3955	#if defined(MBEDTLS_SSL_DTLS_BADMAC_LIMIT)
marcozecchini	0:9fca2b23d0ba	3956	if( ssl->conf->badmac_limit != 0 &&
marcozecchini	0:9fca2b23d0ba	3957	++ssl->badmac_seen >= ssl->conf->badmac_limit )
marcozecchini	0:9fca2b23d0ba	3958	{
marcozecchini	0:9fca2b23d0ba	3959	MBEDTLS_SSL_DEBUG_MSG( 1, ( "too many records with bad MAC" ) );
marcozecchini	0:9fca2b23d0ba	3960	return( MBEDTLS_ERR_SSL_INVALID_MAC );
marcozecchini	0:9fca2b23d0ba	3961	}
marcozecchini	0:9fca2b23d0ba	3962	#endif
marcozecchini	0:9fca2b23d0ba	3963
marcozecchini	0:9fca2b23d0ba	3964	/* As above, invalid records cause
marcozecchini	0:9fca2b23d0ba	3965	* dismissal of the whole datagram. */
marcozecchini	0:9fca2b23d0ba	3966
marcozecchini	0:9fca2b23d0ba	3967	ssl->next_record_offset = 0;
marcozecchini	0:9fca2b23d0ba	3968	ssl->in_left = 0;
marcozecchini	0:9fca2b23d0ba	3969
marcozecchini	0:9fca2b23d0ba	3970	MBEDTLS_SSL_DEBUG_MSG( 1, ( "discarding invalid record (mac)" ) );
marcozecchini	0:9fca2b23d0ba	3971	goto read_record_header;
marcozecchini	0:9fca2b23d0ba	3972	}
marcozecchini	0:9fca2b23d0ba	3973
marcozecchini	0:9fca2b23d0ba	3974	return( ret );
marcozecchini	0:9fca2b23d0ba	3975	}
marcozecchini	0:9fca2b23d0ba	3976	else
marcozecchini	0:9fca2b23d0ba	3977	#endif
marcozecchini	0:9fca2b23d0ba	3978	{
marcozecchini	0:9fca2b23d0ba	3979	/* Error out (and send alert) on invalid records */
marcozecchini	0:9fca2b23d0ba	3980	#if defined(MBEDTLS_SSL_ALL_ALERT_MESSAGES)
marcozecchini	0:9fca2b23d0ba	3981	if( ret == MBEDTLS_ERR_SSL_INVALID_MAC )
marcozecchini	0:9fca2b23d0ba	3982	{
marcozecchini	0:9fca2b23d0ba	3983	mbedtls_ssl_send_alert_message( ssl,
marcozecchini	0:9fca2b23d0ba	3984	MBEDTLS_SSL_ALERT_LEVEL_FATAL,
marcozecchini	0:9fca2b23d0ba	3985	MBEDTLS_SSL_ALERT_MSG_BAD_RECORD_MAC );
marcozecchini	0:9fca2b23d0ba	3986	}
marcozecchini	0:9fca2b23d0ba	3987	#endif
marcozecchini	0:9fca2b23d0ba	3988	return( ret );
marcozecchini	0:9fca2b23d0ba	3989	}
marcozecchini	0:9fca2b23d0ba	3990	}
marcozecchini	0:9fca2b23d0ba	3991
marcozecchini	0:9fca2b23d0ba	3992	/*
marcozecchini	0:9fca2b23d0ba	3993	* When we sent the last flight of the handshake, we MUST respond to a
marcozecchini	0:9fca2b23d0ba	3994	* retransmit of the peer's previous flight with a retransmit. (In
marcozecchini	0:9fca2b23d0ba	3995	* practice, only the Finished message will make it, other messages
marcozecchini	0:9fca2b23d0ba	3996	* including CCS use the old transform so they're dropped as invalid.)
marcozecchini	0:9fca2b23d0ba	3997	*
marcozecchini	0:9fca2b23d0ba	3998	* If the record we received is not a handshake message, however, it
marcozecchini	0:9fca2b23d0ba	3999	* means the peer received our last flight so we can clean up
marcozecchini	0:9fca2b23d0ba	4000	* handshake info.
marcozecchini	0:9fca2b23d0ba	4001	*
marcozecchini	0:9fca2b23d0ba	4002	* This check needs to be done before prepare_handshake() due to an edge
marcozecchini	0:9fca2b23d0ba	4003	* case: if the client immediately requests renegotiation, this
marcozecchini	0:9fca2b23d0ba	4004	* finishes the current handshake first, avoiding the new ClientHello
marcozecchini	0:9fca2b23d0ba	4005	* being mistaken for an ancient message in the current handshake.
marcozecchini	0:9fca2b23d0ba	4006	*/
marcozecchini	0:9fca2b23d0ba	4007	#if defined(MBEDTLS_SSL_PROTO_DTLS)
marcozecchini	0:9fca2b23d0ba	4008	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM &&
marcozecchini	0:9fca2b23d0ba	4009	ssl->handshake != NULL &&
marcozecchini	0:9fca2b23d0ba	4010	ssl->state == MBEDTLS_SSL_HANDSHAKE_OVER )
marcozecchini	0:9fca2b23d0ba	4011	{
marcozecchini	0:9fca2b23d0ba	4012	if( ssl->in_msgtype == MBEDTLS_SSL_MSG_HANDSHAKE &&
marcozecchini	0:9fca2b23d0ba	4013	ssl->in_msg[0] == MBEDTLS_SSL_HS_FINISHED )
marcozecchini	0:9fca2b23d0ba	4014	{
marcozecchini	0:9fca2b23d0ba	4015	MBEDTLS_SSL_DEBUG_MSG( 2, ( "received retransmit of last flight" ) );
marcozecchini	0:9fca2b23d0ba	4016
marcozecchini	0:9fca2b23d0ba	4017	if( ( ret = mbedtls_ssl_resend( ssl ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	4018	{
marcozecchini	0:9fca2b23d0ba	4019	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_resend", ret );
marcozecchini	0:9fca2b23d0ba	4020	return( ret );
marcozecchini	0:9fca2b23d0ba	4021	}
marcozecchini	0:9fca2b23d0ba	4022
marcozecchini	0:9fca2b23d0ba	4023	return( MBEDTLS_ERR_SSL_WANT_READ );
marcozecchini	0:9fca2b23d0ba	4024	}
marcozecchini	0:9fca2b23d0ba	4025	else
marcozecchini	0:9fca2b23d0ba	4026	{
marcozecchini	0:9fca2b23d0ba	4027	ssl_handshake_wrapup_free_hs_transform( ssl );
marcozecchini	0:9fca2b23d0ba	4028	}
marcozecchini	0:9fca2b23d0ba	4029	}
marcozecchini	0:9fca2b23d0ba	4030	#endif
marcozecchini	0:9fca2b23d0ba	4031
marcozecchini	0:9fca2b23d0ba	4032	return( 0 );
marcozecchini	0:9fca2b23d0ba	4033	}
marcozecchini	0:9fca2b23d0ba	4034
marcozecchini	0:9fca2b23d0ba	4035	int mbedtls_ssl_handle_message_type( mbedtls_ssl_context *ssl )
marcozecchini	0:9fca2b23d0ba	4036	{
marcozecchini	0:9fca2b23d0ba	4037	int ret;
marcozecchini	0:9fca2b23d0ba	4038
marcozecchini	0:9fca2b23d0ba	4039	/*
marcozecchini	0:9fca2b23d0ba	4040	* Handle particular types of records
marcozecchini	0:9fca2b23d0ba	4041	*/
marcozecchini	0:9fca2b23d0ba	4042	if( ssl->in_msgtype == MBEDTLS_SSL_MSG_HANDSHAKE )
marcozecchini	0:9fca2b23d0ba	4043	{
marcozecchini	0:9fca2b23d0ba	4044	if( ( ret = mbedtls_ssl_prepare_handshake_record( ssl ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	4045	{
marcozecchini	0:9fca2b23d0ba	4046	return( ret );
marcozecchini	0:9fca2b23d0ba	4047	}
marcozecchini	0:9fca2b23d0ba	4048	}
marcozecchini	0:9fca2b23d0ba	4049
marcozecchini	0:9fca2b23d0ba	4050	if( ssl->in_msgtype == MBEDTLS_SSL_MSG_ALERT )
marcozecchini	0:9fca2b23d0ba	4051	{
marcozecchini	0:9fca2b23d0ba	4052	MBEDTLS_SSL_DEBUG_MSG( 2, ( "got an alert message, type: [%d:%d]",
marcozecchini	0:9fca2b23d0ba	4053	ssl->in_msg[0], ssl->in_msg[1] ) );
marcozecchini	0:9fca2b23d0ba	4054
marcozecchini	0:9fca2b23d0ba	4055	/*
marcozecchini	0:9fca2b23d0ba	4056	* Ignore non-fatal alerts, except close_notify and no_renegotiation
marcozecchini	0:9fca2b23d0ba	4057	*/
marcozecchini	0:9fca2b23d0ba	4058	if( ssl->in_msg[0] == MBEDTLS_SSL_ALERT_LEVEL_FATAL )
marcozecchini	0:9fca2b23d0ba	4059	{
marcozecchini	0:9fca2b23d0ba	4060	MBEDTLS_SSL_DEBUG_MSG( 1, ( "is a fatal alert message (msg %d)",
marcozecchini	0:9fca2b23d0ba	4061	ssl->in_msg[1] ) );
marcozecchini	0:9fca2b23d0ba	4062	return( MBEDTLS_ERR_SSL_FATAL_ALERT_MESSAGE );
marcozecchini	0:9fca2b23d0ba	4063	}
marcozecchini	0:9fca2b23d0ba	4064
marcozecchini	0:9fca2b23d0ba	4065	if( ssl->in_msg[0] == MBEDTLS_SSL_ALERT_LEVEL_WARNING &&
marcozecchini	0:9fca2b23d0ba	4066	ssl->in_msg[1] == MBEDTLS_SSL_ALERT_MSG_CLOSE_NOTIFY )
marcozecchini	0:9fca2b23d0ba	4067	{
marcozecchini	0:9fca2b23d0ba	4068	MBEDTLS_SSL_DEBUG_MSG( 2, ( "is a close notify message" ) );
marcozecchini	0:9fca2b23d0ba	4069	return( MBEDTLS_ERR_SSL_PEER_CLOSE_NOTIFY );
marcozecchini	0:9fca2b23d0ba	4070	}
marcozecchini	0:9fca2b23d0ba	4071
marcozecchini	0:9fca2b23d0ba	4072	#if defined(MBEDTLS_SSL_RENEGOTIATION_ENABLED)
marcozecchini	0:9fca2b23d0ba	4073	if( ssl->in_msg[0] == MBEDTLS_SSL_ALERT_LEVEL_WARNING &&
marcozecchini	0:9fca2b23d0ba	4074	ssl->in_msg[1] == MBEDTLS_SSL_ALERT_MSG_NO_RENEGOTIATION )
marcozecchini	0:9fca2b23d0ba	4075	{
marcozecchini	0:9fca2b23d0ba	4076	MBEDTLS_SSL_DEBUG_MSG( 2, ( "is a SSLv3 no_cert" ) );
marcozecchini	0:9fca2b23d0ba	4077	/* Will be handled when trying to parse ServerHello */
marcozecchini	0:9fca2b23d0ba	4078	return( 0 );
marcozecchini	0:9fca2b23d0ba	4079	}
marcozecchini	0:9fca2b23d0ba	4080	#endif
marcozecchini	0:9fca2b23d0ba	4081
marcozecchini	0:9fca2b23d0ba	4082	#if defined(MBEDTLS_SSL_PROTO_SSL3) && defined(MBEDTLS_SSL_SRV_C)
marcozecchini	0:9fca2b23d0ba	4083	if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 &&
marcozecchini	0:9fca2b23d0ba	4084	ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER &&
marcozecchini	0:9fca2b23d0ba	4085	ssl->in_msg[0] == MBEDTLS_SSL_ALERT_LEVEL_WARNING &&
marcozecchini	0:9fca2b23d0ba	4086	ssl->in_msg[1] == MBEDTLS_SSL_ALERT_MSG_NO_CERT )
marcozecchini	0:9fca2b23d0ba	4087	{
marcozecchini	0:9fca2b23d0ba	4088	MBEDTLS_SSL_DEBUG_MSG( 2, ( "is a SSLv3 no_cert" ) );
marcozecchini	0:9fca2b23d0ba	4089	/* Will be handled in mbedtls_ssl_parse_certificate() */
marcozecchini	0:9fca2b23d0ba	4090	return( 0 );
marcozecchini	0:9fca2b23d0ba	4091	}
marcozecchini	0:9fca2b23d0ba	4092	#endif /* MBEDTLS_SSL_PROTO_SSL3 && MBEDTLS_SSL_SRV_C */
marcozecchini	0:9fca2b23d0ba	4093
marcozecchini	0:9fca2b23d0ba	4094	/* Silently ignore: fetch new message */
marcozecchini	0:9fca2b23d0ba	4095	return MBEDTLS_ERR_SSL_NON_FATAL;
marcozecchini	0:9fca2b23d0ba	4096	}
marcozecchini	0:9fca2b23d0ba	4097
marcozecchini	0:9fca2b23d0ba	4098	return( 0 );
marcozecchini	0:9fca2b23d0ba	4099	}
marcozecchini	0:9fca2b23d0ba	4100
marcozecchini	0:9fca2b23d0ba	4101	int mbedtls_ssl_send_fatal_handshake_failure( mbedtls_ssl_context *ssl )
marcozecchini	0:9fca2b23d0ba	4102	{
marcozecchini	0:9fca2b23d0ba	4103	int ret;
marcozecchini	0:9fca2b23d0ba	4104
marcozecchini	0:9fca2b23d0ba	4105	if( ( ret = mbedtls_ssl_send_alert_message( ssl,
marcozecchini	0:9fca2b23d0ba	4106	MBEDTLS_SSL_ALERT_LEVEL_FATAL,
marcozecchini	0:9fca2b23d0ba	4107	MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	4108	{
marcozecchini	0:9fca2b23d0ba	4109	return( ret );
marcozecchini	0:9fca2b23d0ba	4110	}
marcozecchini	0:9fca2b23d0ba	4111
marcozecchini	0:9fca2b23d0ba	4112	return( 0 );
marcozecchini	0:9fca2b23d0ba	4113	}
marcozecchini	0:9fca2b23d0ba	4114
marcozecchini	0:9fca2b23d0ba	4115	int mbedtls_ssl_send_alert_message( mbedtls_ssl_context *ssl,
marcozecchini	0:9fca2b23d0ba	4116	unsigned char level,
marcozecchini	0:9fca2b23d0ba	4117	unsigned char message )
marcozecchini	0:9fca2b23d0ba	4118	{
marcozecchini	0:9fca2b23d0ba	4119	int ret;
marcozecchini	0:9fca2b23d0ba	4120
marcozecchini	0:9fca2b23d0ba	4121	if( ssl == NULL \|\| ssl->conf == NULL )
marcozecchini	0:9fca2b23d0ba	4122	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
marcozecchini	0:9fca2b23d0ba	4123
marcozecchini	0:9fca2b23d0ba	4124	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> send alert message" ) );
marcozecchini	0:9fca2b23d0ba	4125	MBEDTLS_SSL_DEBUG_MSG( 3, ( "send alert level=%u message=%u", level, message ));
marcozecchini	0:9fca2b23d0ba	4126
marcozecchini	0:9fca2b23d0ba	4127	ssl->out_msgtype = MBEDTLS_SSL_MSG_ALERT;
marcozecchini	0:9fca2b23d0ba	4128	ssl->out_msglen = 2;
marcozecchini	0:9fca2b23d0ba	4129	ssl->out_msg[0] = level;
marcozecchini	0:9fca2b23d0ba	4130	ssl->out_msg[1] = message;
marcozecchini	0:9fca2b23d0ba	4131
marcozecchini	0:9fca2b23d0ba	4132	if( ( ret = mbedtls_ssl_write_record( ssl ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	4133	{
marcozecchini	0:9fca2b23d0ba	4134	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_write_record", ret );
marcozecchini	0:9fca2b23d0ba	4135	return( ret );
marcozecchini	0:9fca2b23d0ba	4136	}
marcozecchini	0:9fca2b23d0ba	4137	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= send alert message" ) );
marcozecchini	0:9fca2b23d0ba	4138
marcozecchini	0:9fca2b23d0ba	4139	return( 0 );
marcozecchini	0:9fca2b23d0ba	4140	}
marcozecchini	0:9fca2b23d0ba	4141
marcozecchini	0:9fca2b23d0ba	4142	/*
marcozecchini	0:9fca2b23d0ba	4143	* Handshake functions
marcozecchini	0:9fca2b23d0ba	4144	*/
marcozecchini	0:9fca2b23d0ba	4145	#if !defined(MBEDTLS_KEY_EXCHANGE_RSA_ENABLED) && \
marcozecchini	0:9fca2b23d0ba	4146	!defined(MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED) && \
marcozecchini	0:9fca2b23d0ba	4147	!defined(MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED) && \
marcozecchini	0:9fca2b23d0ba	4148	!defined(MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED) && \
marcozecchini	0:9fca2b23d0ba	4149	!defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED) && \
marcozecchini	0:9fca2b23d0ba	4150	!defined(MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED) && \
marcozecchini	0:9fca2b23d0ba	4151	!defined(MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED)
marcozecchini	0:9fca2b23d0ba	4152	/* No certificate support -> dummy functions */
marcozecchini	0:9fca2b23d0ba	4153	int mbedtls_ssl_write_certificate( mbedtls_ssl_context *ssl )
marcozecchini	0:9fca2b23d0ba	4154	{
marcozecchini	0:9fca2b23d0ba	4155	const mbedtls_ssl_ciphersuite_t *ciphersuite_info = ssl->transform_negotiate->ciphersuite_info;
marcozecchini	0:9fca2b23d0ba	4156
marcozecchini	0:9fca2b23d0ba	4157	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write certificate" ) );
marcozecchini	0:9fca2b23d0ba	4158
marcozecchini	0:9fca2b23d0ba	4159	if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_PSK \|\|
marcozecchini	0:9fca2b23d0ba	4160	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_DHE_PSK \|\|
marcozecchini	0:9fca2b23d0ba	4161	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_PSK \|\|
marcozecchini	0:9fca2b23d0ba	4162	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECJPAKE )
marcozecchini	0:9fca2b23d0ba	4163	{
marcozecchini	0:9fca2b23d0ba	4164	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip write certificate" ) );
marcozecchini	0:9fca2b23d0ba	4165	ssl->state++;
marcozecchini	0:9fca2b23d0ba	4166	return( 0 );
marcozecchini	0:9fca2b23d0ba	4167	}
marcozecchini	0:9fca2b23d0ba	4168
marcozecchini	0:9fca2b23d0ba	4169	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
marcozecchini	0:9fca2b23d0ba	4170	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
marcozecchini	0:9fca2b23d0ba	4171	}
marcozecchini	0:9fca2b23d0ba	4172
marcozecchini	0:9fca2b23d0ba	4173	int mbedtls_ssl_parse_certificate( mbedtls_ssl_context *ssl )
marcozecchini	0:9fca2b23d0ba	4174	{
marcozecchini	0:9fca2b23d0ba	4175	const mbedtls_ssl_ciphersuite_t *ciphersuite_info = ssl->transform_negotiate->ciphersuite_info;
marcozecchini	0:9fca2b23d0ba	4176
marcozecchini	0:9fca2b23d0ba	4177	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> parse certificate" ) );
marcozecchini	0:9fca2b23d0ba	4178
marcozecchini	0:9fca2b23d0ba	4179	if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_PSK \|\|
marcozecchini	0:9fca2b23d0ba	4180	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_DHE_PSK \|\|
marcozecchini	0:9fca2b23d0ba	4181	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_PSK \|\|
marcozecchini	0:9fca2b23d0ba	4182	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECJPAKE )
marcozecchini	0:9fca2b23d0ba	4183	{
marcozecchini	0:9fca2b23d0ba	4184	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip parse certificate" ) );
marcozecchini	0:9fca2b23d0ba	4185	ssl->state++;
marcozecchini	0:9fca2b23d0ba	4186	return( 0 );
marcozecchini	0:9fca2b23d0ba	4187	}
marcozecchini	0:9fca2b23d0ba	4188
marcozecchini	0:9fca2b23d0ba	4189	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
marcozecchini	0:9fca2b23d0ba	4190	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
marcozecchini	0:9fca2b23d0ba	4191	}
marcozecchini	0:9fca2b23d0ba	4192
marcozecchini	0:9fca2b23d0ba	4193	#else
marcozecchini	0:9fca2b23d0ba	4194	/* Some certificate support -> implement write and parse */
marcozecchini	0:9fca2b23d0ba	4195
marcozecchini	0:9fca2b23d0ba	4196	int mbedtls_ssl_write_certificate( mbedtls_ssl_context *ssl )
marcozecchini	0:9fca2b23d0ba	4197	{
marcozecchini	0:9fca2b23d0ba	4198	int ret = MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE;
marcozecchini	0:9fca2b23d0ba	4199	size_t i, n;
marcozecchini	0:9fca2b23d0ba	4200	const mbedtls_x509_crt *crt;
marcozecchini	0:9fca2b23d0ba	4201	const mbedtls_ssl_ciphersuite_t *ciphersuite_info = ssl->transform_negotiate->ciphersuite_info;
marcozecchini	0:9fca2b23d0ba	4202
marcozecchini	0:9fca2b23d0ba	4203	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write certificate" ) );
marcozecchini	0:9fca2b23d0ba	4204
marcozecchini	0:9fca2b23d0ba	4205	if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_PSK \|\|
marcozecchini	0:9fca2b23d0ba	4206	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_DHE_PSK \|\|
marcozecchini	0:9fca2b23d0ba	4207	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_PSK \|\|
marcozecchini	0:9fca2b23d0ba	4208	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECJPAKE )
marcozecchini	0:9fca2b23d0ba	4209	{
marcozecchini	0:9fca2b23d0ba	4210	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip write certificate" ) );
marcozecchini	0:9fca2b23d0ba	4211	ssl->state++;
marcozecchini	0:9fca2b23d0ba	4212	return( 0 );
marcozecchini	0:9fca2b23d0ba	4213	}
marcozecchini	0:9fca2b23d0ba	4214
marcozecchini	0:9fca2b23d0ba	4215	#if defined(MBEDTLS_SSL_CLI_C)
marcozecchini	0:9fca2b23d0ba	4216	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_CLIENT )
marcozecchini	0:9fca2b23d0ba	4217	{
marcozecchini	0:9fca2b23d0ba	4218	if( ssl->client_auth == 0 )
marcozecchini	0:9fca2b23d0ba	4219	{
marcozecchini	0:9fca2b23d0ba	4220	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip write certificate" ) );
marcozecchini	0:9fca2b23d0ba	4221	ssl->state++;
marcozecchini	0:9fca2b23d0ba	4222	return( 0 );
marcozecchini	0:9fca2b23d0ba	4223	}
marcozecchini	0:9fca2b23d0ba	4224
marcozecchini	0:9fca2b23d0ba	4225	#if defined(MBEDTLS_SSL_PROTO_SSL3)
marcozecchini	0:9fca2b23d0ba	4226	/*
marcozecchini	0:9fca2b23d0ba	4227	* If using SSLv3 and got no cert, send an Alert message
marcozecchini	0:9fca2b23d0ba	4228	* (otherwise an empty Certificate message will be sent).
marcozecchini	0:9fca2b23d0ba	4229	*/
marcozecchini	0:9fca2b23d0ba	4230	if( mbedtls_ssl_own_cert( ssl ) == NULL &&
marcozecchini	0:9fca2b23d0ba	4231	ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 )
marcozecchini	0:9fca2b23d0ba	4232	{
marcozecchini	0:9fca2b23d0ba	4233	ssl->out_msglen = 2;
marcozecchini	0:9fca2b23d0ba	4234	ssl->out_msgtype = MBEDTLS_SSL_MSG_ALERT;
marcozecchini	0:9fca2b23d0ba	4235	ssl->out_msg[0] = MBEDTLS_SSL_ALERT_LEVEL_WARNING;
marcozecchini	0:9fca2b23d0ba	4236	ssl->out_msg[1] = MBEDTLS_SSL_ALERT_MSG_NO_CERT;
marcozecchini	0:9fca2b23d0ba	4237
marcozecchini	0:9fca2b23d0ba	4238	MBEDTLS_SSL_DEBUG_MSG( 2, ( "got no certificate to send" ) );
marcozecchini	0:9fca2b23d0ba	4239	goto write_msg;
marcozecchini	0:9fca2b23d0ba	4240	}
marcozecchini	0:9fca2b23d0ba	4241	#endif /* MBEDTLS_SSL_PROTO_SSL3 */
marcozecchini	0:9fca2b23d0ba	4242	}
marcozecchini	0:9fca2b23d0ba	4243	#endif /* MBEDTLS_SSL_CLI_C */
marcozecchini	0:9fca2b23d0ba	4244	#if defined(MBEDTLS_SSL_SRV_C)
marcozecchini	0:9fca2b23d0ba	4245	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER )
marcozecchini	0:9fca2b23d0ba	4246	{
marcozecchini	0:9fca2b23d0ba	4247	if( mbedtls_ssl_own_cert( ssl ) == NULL )
marcozecchini	0:9fca2b23d0ba	4248	{
marcozecchini	0:9fca2b23d0ba	4249	MBEDTLS_SSL_DEBUG_MSG( 1, ( "got no certificate to send" ) );
marcozecchini	0:9fca2b23d0ba	4250	return( MBEDTLS_ERR_SSL_CERTIFICATE_REQUIRED );
marcozecchini	0:9fca2b23d0ba	4251	}
marcozecchini	0:9fca2b23d0ba	4252	}
marcozecchini	0:9fca2b23d0ba	4253	#endif
marcozecchini	0:9fca2b23d0ba	4254
marcozecchini	0:9fca2b23d0ba	4255	MBEDTLS_SSL_DEBUG_CRT( 3, "own certificate", mbedtls_ssl_own_cert( ssl ) );
marcozecchini	0:9fca2b23d0ba	4256
marcozecchini	0:9fca2b23d0ba	4257	/*
marcozecchini	0:9fca2b23d0ba	4258	* 0 . 0 handshake type
marcozecchini	0:9fca2b23d0ba	4259	* 1 . 3 handshake length
marcozecchini	0:9fca2b23d0ba	4260	* 4 . 6 length of all certs
marcozecchini	0:9fca2b23d0ba	4261	* 7 . 9 length of cert. 1
marcozecchini	0:9fca2b23d0ba	4262	* 10 . n-1 peer certificate
marcozecchini	0:9fca2b23d0ba	4263	* n . n+2 length of cert. 2
marcozecchini	0:9fca2b23d0ba	4264	* n+3 . ... upper level cert, etc.
marcozecchini	0:9fca2b23d0ba	4265	*/
marcozecchini	0:9fca2b23d0ba	4266	i = 7;
marcozecchini	0:9fca2b23d0ba	4267	crt = mbedtls_ssl_own_cert( ssl );
marcozecchini	0:9fca2b23d0ba	4268
marcozecchini	0:9fca2b23d0ba	4269	while( crt != NULL )
marcozecchini	0:9fca2b23d0ba	4270	{
marcozecchini	0:9fca2b23d0ba	4271	n = crt->raw.len;
marcozecchini	0:9fca2b23d0ba	4272	if( n > MBEDTLS_SSL_MAX_CONTENT_LEN - 3 - i )
marcozecchini	0:9fca2b23d0ba	4273	{
marcozecchini	0:9fca2b23d0ba	4274	MBEDTLS_SSL_DEBUG_MSG( 1, ( "certificate too large, %d > %d",
marcozecchini	0:9fca2b23d0ba	4275	i + 3 + n, MBEDTLS_SSL_MAX_CONTENT_LEN ) );
marcozecchini	0:9fca2b23d0ba	4276	return( MBEDTLS_ERR_SSL_CERTIFICATE_TOO_LARGE );
marcozecchini	0:9fca2b23d0ba	4277	}
marcozecchini	0:9fca2b23d0ba	4278
marcozecchini	0:9fca2b23d0ba	4279	ssl->out_msg[i ] = (unsigned char)( n >> 16 );
marcozecchini	0:9fca2b23d0ba	4280	ssl->out_msg[i + 1] = (unsigned char)( n >> 8 );
marcozecchini	0:9fca2b23d0ba	4281	ssl->out_msg[i + 2] = (unsigned char)( n );
marcozecchini	0:9fca2b23d0ba	4282
marcozecchini	0:9fca2b23d0ba	4283	i += 3; memcpy( ssl->out_msg + i, crt->raw.p, n );
marcozecchini	0:9fca2b23d0ba	4284	i += n; crt = crt->next;
marcozecchini	0:9fca2b23d0ba	4285	}
marcozecchini	0:9fca2b23d0ba	4286
marcozecchini	0:9fca2b23d0ba	4287	ssl->out_msg[4] = (unsigned char)( ( i - 7 ) >> 16 );
marcozecchini	0:9fca2b23d0ba	4288	ssl->out_msg[5] = (unsigned char)( ( i - 7 ) >> 8 );
marcozecchini	0:9fca2b23d0ba	4289	ssl->out_msg[6] = (unsigned char)( ( i - 7 ) );
marcozecchini	0:9fca2b23d0ba	4290
marcozecchini	0:9fca2b23d0ba	4291	ssl->out_msglen = i;
marcozecchini	0:9fca2b23d0ba	4292	ssl->out_msgtype = MBEDTLS_SSL_MSG_HANDSHAKE;
marcozecchini	0:9fca2b23d0ba	4293	ssl->out_msg[0] = MBEDTLS_SSL_HS_CERTIFICATE;
marcozecchini	0:9fca2b23d0ba	4294
marcozecchini	0:9fca2b23d0ba	4295	#if defined(MBEDTLS_SSL_PROTO_SSL3) && defined(MBEDTLS_SSL_CLI_C)
marcozecchini	0:9fca2b23d0ba	4296	write_msg:
marcozecchini	0:9fca2b23d0ba	4297	#endif
marcozecchini	0:9fca2b23d0ba	4298
marcozecchini	0:9fca2b23d0ba	4299	ssl->state++;
marcozecchini	0:9fca2b23d0ba	4300
marcozecchini	0:9fca2b23d0ba	4301	if( ( ret = mbedtls_ssl_write_record( ssl ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	4302	{
marcozecchini	0:9fca2b23d0ba	4303	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_write_record", ret );
marcozecchini	0:9fca2b23d0ba	4304	return( ret );
marcozecchini	0:9fca2b23d0ba	4305	}
marcozecchini	0:9fca2b23d0ba	4306
marcozecchini	0:9fca2b23d0ba	4307	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= write certificate" ) );
marcozecchini	0:9fca2b23d0ba	4308
marcozecchini	0:9fca2b23d0ba	4309	return( ret );
marcozecchini	0:9fca2b23d0ba	4310	}
marcozecchini	0:9fca2b23d0ba	4311
marcozecchini	0:9fca2b23d0ba	4312	int mbedtls_ssl_parse_certificate( mbedtls_ssl_context *ssl )
marcozecchini	0:9fca2b23d0ba	4313	{
marcozecchini	0:9fca2b23d0ba	4314	int ret = MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE;
marcozecchini	0:9fca2b23d0ba	4315	size_t i, n;
marcozecchini	0:9fca2b23d0ba	4316	const mbedtls_ssl_ciphersuite_t *ciphersuite_info = ssl->transform_negotiate->ciphersuite_info;
marcozecchini	0:9fca2b23d0ba	4317	int authmode = ssl->conf->authmode;
marcozecchini	0:9fca2b23d0ba	4318	uint8_t alert;
marcozecchini	0:9fca2b23d0ba	4319
marcozecchini	0:9fca2b23d0ba	4320	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> parse certificate" ) );
marcozecchini	0:9fca2b23d0ba	4321
marcozecchini	0:9fca2b23d0ba	4322	if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_PSK \|\|
marcozecchini	0:9fca2b23d0ba	4323	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_DHE_PSK \|\|
marcozecchini	0:9fca2b23d0ba	4324	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_PSK \|\|
marcozecchini	0:9fca2b23d0ba	4325	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECJPAKE )
marcozecchini	0:9fca2b23d0ba	4326	{
marcozecchini	0:9fca2b23d0ba	4327	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip parse certificate" ) );
marcozecchini	0:9fca2b23d0ba	4328	ssl->state++;
marcozecchini	0:9fca2b23d0ba	4329	return( 0 );
marcozecchini	0:9fca2b23d0ba	4330	}
marcozecchini	0:9fca2b23d0ba	4331
marcozecchini	0:9fca2b23d0ba	4332	#if defined(MBEDTLS_SSL_SRV_C)
marcozecchini	0:9fca2b23d0ba	4333	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER &&
marcozecchini	0:9fca2b23d0ba	4334	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_RSA_PSK )
marcozecchini	0:9fca2b23d0ba	4335	{
marcozecchini	0:9fca2b23d0ba	4336	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip parse certificate" ) );
marcozecchini	0:9fca2b23d0ba	4337	ssl->state++;
marcozecchini	0:9fca2b23d0ba	4338	return( 0 );
marcozecchini	0:9fca2b23d0ba	4339	}
marcozecchini	0:9fca2b23d0ba	4340
marcozecchini	0:9fca2b23d0ba	4341	#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
marcozecchini	0:9fca2b23d0ba	4342	if( ssl->handshake->sni_authmode != MBEDTLS_SSL_VERIFY_UNSET )
marcozecchini	0:9fca2b23d0ba	4343	authmode = ssl->handshake->sni_authmode;
marcozecchini	0:9fca2b23d0ba	4344	#endif
marcozecchini	0:9fca2b23d0ba	4345
marcozecchini	0:9fca2b23d0ba	4346	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER &&
marcozecchini	0:9fca2b23d0ba	4347	authmode == MBEDTLS_SSL_VERIFY_NONE )
marcozecchini	0:9fca2b23d0ba	4348	{
marcozecchini	0:9fca2b23d0ba	4349	ssl->session_negotiate->verify_result = MBEDTLS_X509_BADCERT_SKIP_VERIFY;
marcozecchini	0:9fca2b23d0ba	4350	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip parse certificate" ) );
marcozecchini	0:9fca2b23d0ba	4351	ssl->state++;
marcozecchini	0:9fca2b23d0ba	4352	return( 0 );
marcozecchini	0:9fca2b23d0ba	4353	}
marcozecchini	0:9fca2b23d0ba	4354	#endif
marcozecchini	0:9fca2b23d0ba	4355
marcozecchini	0:9fca2b23d0ba	4356	if( ( ret = mbedtls_ssl_read_record( ssl ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	4357	{
marcozecchini	0:9fca2b23d0ba	4358	/* mbedtls_ssl_read_record may have sent an alert already. We
marcozecchini	0:9fca2b23d0ba	4359	let it decide whether to alert. */
marcozecchini	0:9fca2b23d0ba	4360	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_read_record", ret );
marcozecchini	0:9fca2b23d0ba	4361	return( ret );
marcozecchini	0:9fca2b23d0ba	4362	}
marcozecchini	0:9fca2b23d0ba	4363
marcozecchini	0:9fca2b23d0ba	4364	ssl->state++;
marcozecchini	0:9fca2b23d0ba	4365
marcozecchini	0:9fca2b23d0ba	4366	#if defined(MBEDTLS_SSL_SRV_C)
marcozecchini	0:9fca2b23d0ba	4367	#if defined(MBEDTLS_SSL_PROTO_SSL3)
marcozecchini	0:9fca2b23d0ba	4368	/*
marcozecchini	0:9fca2b23d0ba	4369	* Check if the client sent an empty certificate
marcozecchini	0:9fca2b23d0ba	4370	*/
marcozecchini	0:9fca2b23d0ba	4371	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER &&
marcozecchini	0:9fca2b23d0ba	4372	ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 )
marcozecchini	0:9fca2b23d0ba	4373	{
marcozecchini	0:9fca2b23d0ba	4374	if( ssl->in_msglen == 2 &&
marcozecchini	0:9fca2b23d0ba	4375	ssl->in_msgtype == MBEDTLS_SSL_MSG_ALERT &&
marcozecchini	0:9fca2b23d0ba	4376	ssl->in_msg[0] == MBEDTLS_SSL_ALERT_LEVEL_WARNING &&
marcozecchini	0:9fca2b23d0ba	4377	ssl->in_msg[1] == MBEDTLS_SSL_ALERT_MSG_NO_CERT )
marcozecchini	0:9fca2b23d0ba	4378	{
marcozecchini	0:9fca2b23d0ba	4379	MBEDTLS_SSL_DEBUG_MSG( 1, ( "SSLv3 client has no certificate" ) );
marcozecchini	0:9fca2b23d0ba	4380
marcozecchini	0:9fca2b23d0ba	4381	/* The client was asked for a certificate but didn't send
marcozecchini	0:9fca2b23d0ba	4382	one. The client should know what's going on, so we
marcozecchini	0:9fca2b23d0ba	4383	don't send an alert. */
marcozecchini	0:9fca2b23d0ba	4384	ssl->session_negotiate->verify_result = MBEDTLS_X509_BADCERT_MISSING;
marcozecchini	0:9fca2b23d0ba	4385	if( authmode == MBEDTLS_SSL_VERIFY_OPTIONAL )
marcozecchini	0:9fca2b23d0ba	4386	return( 0 );
marcozecchini	0:9fca2b23d0ba	4387	else
marcozecchini	0:9fca2b23d0ba	4388	return( MBEDTLS_ERR_SSL_NO_CLIENT_CERTIFICATE );
marcozecchini	0:9fca2b23d0ba	4389	}
marcozecchini	0:9fca2b23d0ba	4390	}
marcozecchini	0:9fca2b23d0ba	4391	#endif /* MBEDTLS_SSL_PROTO_SSL3 */
marcozecchini	0:9fca2b23d0ba	4392
marcozecchini	0:9fca2b23d0ba	4393	#if defined(MBEDTLS_SSL_PROTO_TLS1) \|\| defined(MBEDTLS_SSL_PROTO_TLS1_1) \|\| \
marcozecchini	0:9fca2b23d0ba	4394	defined(MBEDTLS_SSL_PROTO_TLS1_2)
marcozecchini	0:9fca2b23d0ba	4395	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER &&
marcozecchini	0:9fca2b23d0ba	4396	ssl->minor_ver != MBEDTLS_SSL_MINOR_VERSION_0 )
marcozecchini	0:9fca2b23d0ba	4397	{
marcozecchini	0:9fca2b23d0ba	4398	if( ssl->in_hslen == 3 + mbedtls_ssl_hs_hdr_len( ssl ) &&
marcozecchini	0:9fca2b23d0ba	4399	ssl->in_msgtype == MBEDTLS_SSL_MSG_HANDSHAKE &&
marcozecchini	0:9fca2b23d0ba	4400	ssl->in_msg[0] == MBEDTLS_SSL_HS_CERTIFICATE &&
marcozecchini	0:9fca2b23d0ba	4401	memcmp( ssl->in_msg + mbedtls_ssl_hs_hdr_len( ssl ), "\0\0\0", 3 ) == 0 )
marcozecchini	0:9fca2b23d0ba	4402	{
marcozecchini	0:9fca2b23d0ba	4403	MBEDTLS_SSL_DEBUG_MSG( 1, ( "TLSv1 client has no certificate" ) );
marcozecchini	0:9fca2b23d0ba	4404
marcozecchini	0:9fca2b23d0ba	4405	/* The client was asked for a certificate but didn't send
marcozecchini	0:9fca2b23d0ba	4406	one. The client should know what's going on, so we
marcozecchini	0:9fca2b23d0ba	4407	don't send an alert. */
marcozecchini	0:9fca2b23d0ba	4408	ssl->session_negotiate->verify_result = MBEDTLS_X509_BADCERT_MISSING;
marcozecchini	0:9fca2b23d0ba	4409	if( authmode == MBEDTLS_SSL_VERIFY_OPTIONAL )
marcozecchini	0:9fca2b23d0ba	4410	return( 0 );
marcozecchini	0:9fca2b23d0ba	4411	else
marcozecchini	0:9fca2b23d0ba	4412	return( MBEDTLS_ERR_SSL_NO_CLIENT_CERTIFICATE );
marcozecchini	0:9fca2b23d0ba	4413	}
marcozecchini	0:9fca2b23d0ba	4414	}
marcozecchini	0:9fca2b23d0ba	4415	#endif /* MBEDTLS_SSL_PROTO_TLS1 \|\| MBEDTLS_SSL_PROTO_TLS1_1 \|\| \
marcozecchini	0:9fca2b23d0ba	4416	MBEDTLS_SSL_PROTO_TLS1_2 */
marcozecchini	0:9fca2b23d0ba	4417	#endif /* MBEDTLS_SSL_SRV_C */
marcozecchini	0:9fca2b23d0ba	4418
marcozecchini	0:9fca2b23d0ba	4419	if( ssl->in_msgtype != MBEDTLS_SSL_MSG_HANDSHAKE )
marcozecchini	0:9fca2b23d0ba	4420	{
marcozecchini	0:9fca2b23d0ba	4421	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate message" ) );
marcozecchini	0:9fca2b23d0ba	4422	mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
marcozecchini	0:9fca2b23d0ba	4423	MBEDTLS_SSL_ALERT_MSG_UNEXPECTED_MESSAGE );
marcozecchini	0:9fca2b23d0ba	4424	return( MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE );
marcozecchini	0:9fca2b23d0ba	4425	}
marcozecchini	0:9fca2b23d0ba	4426
marcozecchini	0:9fca2b23d0ba	4427	if( ssl->in_msg[0] != MBEDTLS_SSL_HS_CERTIFICATE \|\|
marcozecchini	0:9fca2b23d0ba	4428	ssl->in_hslen < mbedtls_ssl_hs_hdr_len( ssl ) + 3 + 3 )
marcozecchini	0:9fca2b23d0ba	4429	{
marcozecchini	0:9fca2b23d0ba	4430	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate message" ) );
marcozecchini	0:9fca2b23d0ba	4431	mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
marcozecchini	0:9fca2b23d0ba	4432	MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
marcozecchini	0:9fca2b23d0ba	4433	return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE );
marcozecchini	0:9fca2b23d0ba	4434	}
marcozecchini	0:9fca2b23d0ba	4435
marcozecchini	0:9fca2b23d0ba	4436	i = mbedtls_ssl_hs_hdr_len( ssl );
marcozecchini	0:9fca2b23d0ba	4437
marcozecchini	0:9fca2b23d0ba	4438	/*
marcozecchini	0:9fca2b23d0ba	4439	* Same message structure as in mbedtls_ssl_write_certificate()
marcozecchini	0:9fca2b23d0ba	4440	*/
marcozecchini	0:9fca2b23d0ba	4441	n = ( ssl->in_msg[i+1] << 8 ) \| ssl->in_msg[i+2];
marcozecchini	0:9fca2b23d0ba	4442
marcozecchini	0:9fca2b23d0ba	4443	if( ssl->in_msg[i] != 0 \|\|
marcozecchini	0:9fca2b23d0ba	4444	ssl->in_hslen != n + 3 + mbedtls_ssl_hs_hdr_len( ssl ) )
marcozecchini	0:9fca2b23d0ba	4445	{
marcozecchini	0:9fca2b23d0ba	4446	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate message" ) );
marcozecchini	0:9fca2b23d0ba	4447	mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
marcozecchini	0:9fca2b23d0ba	4448	MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
marcozecchini	0:9fca2b23d0ba	4449	return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE );
marcozecchini	0:9fca2b23d0ba	4450	}
marcozecchini	0:9fca2b23d0ba	4451
marcozecchini	0:9fca2b23d0ba	4452	/* In case we tried to reuse a session but it failed */
marcozecchini	0:9fca2b23d0ba	4453	if( ssl->session_negotiate->peer_cert != NULL )
marcozecchini	0:9fca2b23d0ba	4454	{
marcozecchini	0:9fca2b23d0ba	4455	mbedtls_x509_crt_free( ssl->session_negotiate->peer_cert );
marcozecchini	0:9fca2b23d0ba	4456	mbedtls_free( ssl->session_negotiate->peer_cert );
marcozecchini	0:9fca2b23d0ba	4457	}
marcozecchini	0:9fca2b23d0ba	4458
marcozecchini	0:9fca2b23d0ba	4459	if( ( ssl->session_negotiate->peer_cert = mbedtls_calloc( 1,
marcozecchini	0:9fca2b23d0ba	4460	sizeof( mbedtls_x509_crt ) ) ) == NULL )
marcozecchini	0:9fca2b23d0ba	4461	{
marcozecchini	0:9fca2b23d0ba	4462	MBEDTLS_SSL_DEBUG_MSG( 1, ( "alloc(%d bytes) failed",
marcozecchini	0:9fca2b23d0ba	4463	sizeof( mbedtls_x509_crt ) ) );
marcozecchini	0:9fca2b23d0ba	4464	mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
marcozecchini	0:9fca2b23d0ba	4465	MBEDTLS_SSL_ALERT_MSG_INTERNAL_ERROR );
marcozecchini	0:9fca2b23d0ba	4466	return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
marcozecchini	0:9fca2b23d0ba	4467	}
marcozecchini	0:9fca2b23d0ba	4468
marcozecchini	0:9fca2b23d0ba	4469	mbedtls_x509_crt_init( ssl->session_negotiate->peer_cert );
marcozecchini	0:9fca2b23d0ba	4470
marcozecchini	0:9fca2b23d0ba	4471	i += 3;
marcozecchini	0:9fca2b23d0ba	4472
marcozecchini	0:9fca2b23d0ba	4473	while( i < ssl->in_hslen )
marcozecchini	0:9fca2b23d0ba	4474	{
marcozecchini	0:9fca2b23d0ba	4475	if( ssl->in_msg[i] != 0 )
marcozecchini	0:9fca2b23d0ba	4476	{
marcozecchini	0:9fca2b23d0ba	4477	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate message" ) );
marcozecchini	0:9fca2b23d0ba	4478	mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
marcozecchini	0:9fca2b23d0ba	4479	MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
marcozecchini	0:9fca2b23d0ba	4480	return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE );
marcozecchini	0:9fca2b23d0ba	4481	}
marcozecchini	0:9fca2b23d0ba	4482
marcozecchini	0:9fca2b23d0ba	4483	n = ( (unsigned int) ssl->in_msg[i + 1] << 8 )
marcozecchini	0:9fca2b23d0ba	4484	\| (unsigned int) ssl->in_msg[i + 2];
marcozecchini	0:9fca2b23d0ba	4485	i += 3;
marcozecchini	0:9fca2b23d0ba	4486
marcozecchini	0:9fca2b23d0ba	4487	if( n < 128 \|\| i + n > ssl->in_hslen )
marcozecchini	0:9fca2b23d0ba	4488	{
marcozecchini	0:9fca2b23d0ba	4489	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate message" ) );
marcozecchini	0:9fca2b23d0ba	4490	mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
marcozecchini	0:9fca2b23d0ba	4491	MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
marcozecchini	0:9fca2b23d0ba	4492	return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE );
marcozecchini	0:9fca2b23d0ba	4493	}
marcozecchini	0:9fca2b23d0ba	4494
marcozecchini	0:9fca2b23d0ba	4495	ret = mbedtls_x509_crt_parse_der( ssl->session_negotiate->peer_cert,
marcozecchini	0:9fca2b23d0ba	4496	ssl->in_msg + i, n );
marcozecchini	0:9fca2b23d0ba	4497	switch( ret )
marcozecchini	0:9fca2b23d0ba	4498	{
marcozecchini	0:9fca2b23d0ba	4499	case 0: /ok/
marcozecchini	0:9fca2b23d0ba	4500	case MBEDTLS_ERR_X509_UNKNOWN_SIG_ALG + MBEDTLS_ERR_OID_NOT_FOUND:
marcozecchini	0:9fca2b23d0ba	4501	/* Ignore certificate with an unknown algorithm: maybe a
marcozecchini	0:9fca2b23d0ba	4502	prior certificate was already trusted. */
marcozecchini	0:9fca2b23d0ba	4503	break;
marcozecchini	0:9fca2b23d0ba	4504
marcozecchini	0:9fca2b23d0ba	4505	case MBEDTLS_ERR_X509_ALLOC_FAILED:
marcozecchini	0:9fca2b23d0ba	4506	alert = MBEDTLS_SSL_ALERT_MSG_INTERNAL_ERROR;
marcozecchini	0:9fca2b23d0ba	4507	goto crt_parse_der_failed;
marcozecchini	0:9fca2b23d0ba	4508
marcozecchini	0:9fca2b23d0ba	4509	case MBEDTLS_ERR_X509_UNKNOWN_VERSION:
marcozecchini	0:9fca2b23d0ba	4510	alert = MBEDTLS_SSL_ALERT_MSG_UNSUPPORTED_CERT;
marcozecchini	0:9fca2b23d0ba	4511	goto crt_parse_der_failed;
marcozecchini	0:9fca2b23d0ba	4512
marcozecchini	0:9fca2b23d0ba	4513	default:
marcozecchini	0:9fca2b23d0ba	4514	alert = MBEDTLS_SSL_ALERT_MSG_BAD_CERT;
marcozecchini	0:9fca2b23d0ba	4515	crt_parse_der_failed:
marcozecchini	0:9fca2b23d0ba	4516	mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL, alert );
marcozecchini	0:9fca2b23d0ba	4517	MBEDTLS_SSL_DEBUG_RET( 1, " mbedtls_x509_crt_parse_der", ret );
marcozecchini	0:9fca2b23d0ba	4518	return( ret );
marcozecchini	0:9fca2b23d0ba	4519	}
marcozecchini	0:9fca2b23d0ba	4520
marcozecchini	0:9fca2b23d0ba	4521	i += n;
marcozecchini	0:9fca2b23d0ba	4522	}
marcozecchini	0:9fca2b23d0ba	4523
marcozecchini	0:9fca2b23d0ba	4524	MBEDTLS_SSL_DEBUG_CRT( 3, "peer certificate", ssl->session_negotiate->peer_cert );
marcozecchini	0:9fca2b23d0ba	4525
marcozecchini	0:9fca2b23d0ba	4526	/*
marcozecchini	0:9fca2b23d0ba	4527	* On client, make sure the server cert doesn't change during renego to
marcozecchini	0:9fca2b23d0ba	4528	* avoid "triple handshake" attack: https://secure-resumption.com/
marcozecchini	0:9fca2b23d0ba	4529	*/
marcozecchini	0:9fca2b23d0ba	4530	#if defined(MBEDTLS_SSL_RENEGOTIATION) && defined(MBEDTLS_SSL_CLI_C)
marcozecchini	0:9fca2b23d0ba	4531	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_CLIENT &&
marcozecchini	0:9fca2b23d0ba	4532	ssl->renego_status == MBEDTLS_SSL_RENEGOTIATION_IN_PROGRESS )
marcozecchini	0:9fca2b23d0ba	4533	{
marcozecchini	0:9fca2b23d0ba	4534	if( ssl->session->peer_cert == NULL )
marcozecchini	0:9fca2b23d0ba	4535	{
marcozecchini	0:9fca2b23d0ba	4536	MBEDTLS_SSL_DEBUG_MSG( 1, ( "new server cert during renegotiation" ) );
marcozecchini	0:9fca2b23d0ba	4537	mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
marcozecchini	0:9fca2b23d0ba	4538	MBEDTLS_SSL_ALERT_MSG_ACCESS_DENIED );
marcozecchini	0:9fca2b23d0ba	4539	return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE );
marcozecchini	0:9fca2b23d0ba	4540	}
marcozecchini	0:9fca2b23d0ba	4541
marcozecchini	0:9fca2b23d0ba	4542	if( ssl->session->peer_cert->raw.len !=
marcozecchini	0:9fca2b23d0ba	4543	ssl->session_negotiate->peer_cert->raw.len \|\|
marcozecchini	0:9fca2b23d0ba	4544	memcmp( ssl->session->peer_cert->raw.p,
marcozecchini	0:9fca2b23d0ba	4545	ssl->session_negotiate->peer_cert->raw.p,
marcozecchini	0:9fca2b23d0ba	4546	ssl->session->peer_cert->raw.len ) != 0 )
marcozecchini	0:9fca2b23d0ba	4547	{
marcozecchini	0:9fca2b23d0ba	4548	MBEDTLS_SSL_DEBUG_MSG( 1, ( "server cert changed during renegotiation" ) );
marcozecchini	0:9fca2b23d0ba	4549	mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
marcozecchini	0:9fca2b23d0ba	4550	MBEDTLS_SSL_ALERT_MSG_ACCESS_DENIED );
marcozecchini	0:9fca2b23d0ba	4551	return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE );
marcozecchini	0:9fca2b23d0ba	4552	}
marcozecchini	0:9fca2b23d0ba	4553	}
marcozecchini	0:9fca2b23d0ba	4554	#endif /* MBEDTLS_SSL_RENEGOTIATION && MBEDTLS_SSL_CLI_C */
marcozecchini	0:9fca2b23d0ba	4555
marcozecchini	0:9fca2b23d0ba	4556	if( authmode != MBEDTLS_SSL_VERIFY_NONE )
marcozecchini	0:9fca2b23d0ba	4557	{
marcozecchini	0:9fca2b23d0ba	4558	mbedtls_x509_crt *ca_chain;
marcozecchini	0:9fca2b23d0ba	4559	mbedtls_x509_crl *ca_crl;
marcozecchini	0:9fca2b23d0ba	4560
marcozecchini	0:9fca2b23d0ba	4561	#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
marcozecchini	0:9fca2b23d0ba	4562	if( ssl->handshake->sni_ca_chain != NULL )
marcozecchini	0:9fca2b23d0ba	4563	{
marcozecchini	0:9fca2b23d0ba	4564	ca_chain = ssl->handshake->sni_ca_chain;
marcozecchini	0:9fca2b23d0ba	4565	ca_crl = ssl->handshake->sni_ca_crl;
marcozecchini	0:9fca2b23d0ba	4566	}
marcozecchini	0:9fca2b23d0ba	4567	else
marcozecchini	0:9fca2b23d0ba	4568	#endif
marcozecchini	0:9fca2b23d0ba	4569	{
marcozecchini	0:9fca2b23d0ba	4570	ca_chain = ssl->conf->ca_chain;
marcozecchini	0:9fca2b23d0ba	4571	ca_crl = ssl->conf->ca_crl;
marcozecchini	0:9fca2b23d0ba	4572	}
marcozecchini	0:9fca2b23d0ba	4573
marcozecchini	0:9fca2b23d0ba	4574	/*
marcozecchini	0:9fca2b23d0ba	4575	* Main check: verify certificate
marcozecchini	0:9fca2b23d0ba	4576	*/
marcozecchini	0:9fca2b23d0ba	4577	ret = mbedtls_x509_crt_verify_with_profile(
marcozecchini	0:9fca2b23d0ba	4578	ssl->session_negotiate->peer_cert,
marcozecchini	0:9fca2b23d0ba	4579	ca_chain, ca_crl,
marcozecchini	0:9fca2b23d0ba	4580	ssl->conf->cert_profile,
marcozecchini	0:9fca2b23d0ba	4581	ssl->hostname,
marcozecchini	0:9fca2b23d0ba	4582	&ssl->session_negotiate->verify_result,
marcozecchini	0:9fca2b23d0ba	4583	ssl->conf->f_vrfy, ssl->conf->p_vrfy );
marcozecchini	0:9fca2b23d0ba	4584
marcozecchini	0:9fca2b23d0ba	4585	if( ret != 0 )
marcozecchini	0:9fca2b23d0ba	4586	{
marcozecchini	0:9fca2b23d0ba	4587	MBEDTLS_SSL_DEBUG_RET( 1, "x509_verify_cert", ret );
marcozecchini	0:9fca2b23d0ba	4588	}
marcozecchini	0:9fca2b23d0ba	4589
marcozecchini	0:9fca2b23d0ba	4590	/*
marcozecchini	0:9fca2b23d0ba	4591	* Secondary checks: always done, but change 'ret' only if it was 0
marcozecchini	0:9fca2b23d0ba	4592	*/
marcozecchini	0:9fca2b23d0ba	4593
marcozecchini	0:9fca2b23d0ba	4594	#if defined(MBEDTLS_ECP_C)
marcozecchini	0:9fca2b23d0ba	4595	{
marcozecchini	0:9fca2b23d0ba	4596	const mbedtls_pk_context *pk = &ssl->session_negotiate->peer_cert->pk;
marcozecchini	0:9fca2b23d0ba	4597
marcozecchini	0:9fca2b23d0ba	4598	/* If certificate uses an EC key, make sure the curve is OK */
marcozecchini	0:9fca2b23d0ba	4599	if( mbedtls_pk_can_do( pk, MBEDTLS_PK_ECKEY ) &&
marcozecchini	0:9fca2b23d0ba	4600	mbedtls_ssl_check_curve( ssl, mbedtls_pk_ec( *pk )->grp.id ) != 0 )
marcozecchini	0:9fca2b23d0ba	4601	{
marcozecchini	0:9fca2b23d0ba	4602	ssl->session_negotiate->verify_result \|= MBEDTLS_X509_BADCERT_BAD_KEY;
marcozecchini	0:9fca2b23d0ba	4603
marcozecchini	0:9fca2b23d0ba	4604	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate (EC key curve)" ) );
marcozecchini	0:9fca2b23d0ba	4605	if( ret == 0 )
marcozecchini	0:9fca2b23d0ba	4606	ret = MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE;
marcozecchini	0:9fca2b23d0ba	4607	}
marcozecchini	0:9fca2b23d0ba	4608	}
marcozecchini	0:9fca2b23d0ba	4609	#endif /* MBEDTLS_ECP_C */
marcozecchini	0:9fca2b23d0ba	4610
marcozecchini	0:9fca2b23d0ba	4611	if( mbedtls_ssl_check_cert_usage( ssl->session_negotiate->peer_cert,
marcozecchini	0:9fca2b23d0ba	4612	ciphersuite_info,
marcozecchini	0:9fca2b23d0ba	4613	! ssl->conf->endpoint,
marcozecchini	0:9fca2b23d0ba	4614	&ssl->session_negotiate->verify_result ) != 0 )
marcozecchini	0:9fca2b23d0ba	4615	{
marcozecchini	0:9fca2b23d0ba	4616	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate (usage extensions)" ) );
marcozecchini	0:9fca2b23d0ba	4617	if( ret == 0 )
marcozecchini	0:9fca2b23d0ba	4618	ret = MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE;
marcozecchini	0:9fca2b23d0ba	4619	}
marcozecchini	0:9fca2b23d0ba	4620
marcozecchini	0:9fca2b23d0ba	4621	/* mbedtls_x509_crt_verify_with_profile is supposed to report a
marcozecchini	0:9fca2b23d0ba	4622	* verification failure through MBEDTLS_ERR_X509_CERT_VERIFY_FAILED,
marcozecchini	0:9fca2b23d0ba	4623	* with details encoded in the verification flags. All other kinds
marcozecchini	0:9fca2b23d0ba	4624	* of error codes, including those from the user provided f_vrfy
marcozecchini	0:9fca2b23d0ba	4625	* functions, are treated as fatal and lead to a failure of
marcozecchini	0:9fca2b23d0ba	4626	* ssl_parse_certificate even if verification was optional. */
marcozecchini	0:9fca2b23d0ba	4627	if( authmode == MBEDTLS_SSL_VERIFY_OPTIONAL &&
marcozecchini	0:9fca2b23d0ba	4628	( ret == MBEDTLS_ERR_X509_CERT_VERIFY_FAILED \|\|
marcozecchini	0:9fca2b23d0ba	4629	ret == MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE ) )
marcozecchini	0:9fca2b23d0ba	4630	{
marcozecchini	0:9fca2b23d0ba	4631	ret = 0;
marcozecchini	0:9fca2b23d0ba	4632	}
marcozecchini	0:9fca2b23d0ba	4633
marcozecchini	0:9fca2b23d0ba	4634	if( ca_chain == NULL && authmode == MBEDTLS_SSL_VERIFY_REQUIRED )
marcozecchini	0:9fca2b23d0ba	4635	{
marcozecchini	0:9fca2b23d0ba	4636	MBEDTLS_SSL_DEBUG_MSG( 1, ( "got no CA chain" ) );
marcozecchini	0:9fca2b23d0ba	4637	ret = MBEDTLS_ERR_SSL_CA_CHAIN_REQUIRED;
marcozecchini	0:9fca2b23d0ba	4638	}
marcozecchini	0:9fca2b23d0ba	4639
marcozecchini	0:9fca2b23d0ba	4640	if( ret != 0 )
marcozecchini	0:9fca2b23d0ba	4641	{
marcozecchini	0:9fca2b23d0ba	4642	/* The certificate may have been rejected for several reasons.
marcozecchini	0:9fca2b23d0ba	4643	Pick one and send the corresponding alert. Which alert to send
marcozecchini	0:9fca2b23d0ba	4644	may be a subject of debate in some cases. */
marcozecchini	0:9fca2b23d0ba	4645	if( ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_OTHER )
marcozecchini	0:9fca2b23d0ba	4646	alert = MBEDTLS_SSL_ALERT_MSG_ACCESS_DENIED;
marcozecchini	0:9fca2b23d0ba	4647	else if( ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_CN_MISMATCH )
marcozecchini	0:9fca2b23d0ba	4648	alert = MBEDTLS_SSL_ALERT_MSG_BAD_CERT;
marcozecchini	0:9fca2b23d0ba	4649	else if( ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_KEY_USAGE )
marcozecchini	0:9fca2b23d0ba	4650	alert = MBEDTLS_SSL_ALERT_MSG_UNSUPPORTED_CERT;
marcozecchini	0:9fca2b23d0ba	4651	else if( ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_EXT_KEY_USAGE )
marcozecchini	0:9fca2b23d0ba	4652	alert = MBEDTLS_SSL_ALERT_MSG_UNSUPPORTED_CERT;
marcozecchini	0:9fca2b23d0ba	4653	else if( ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_NS_CERT_TYPE )
marcozecchini	0:9fca2b23d0ba	4654	alert = MBEDTLS_SSL_ALERT_MSG_UNSUPPORTED_CERT;
marcozecchini	0:9fca2b23d0ba	4655	else if( ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_BAD_PK )
marcozecchini	0:9fca2b23d0ba	4656	alert = MBEDTLS_SSL_ALERT_MSG_UNSUPPORTED_CERT;
marcozecchini	0:9fca2b23d0ba	4657	else if( ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_BAD_KEY )
marcozecchini	0:9fca2b23d0ba	4658	alert = MBEDTLS_SSL_ALERT_MSG_UNSUPPORTED_CERT;
marcozecchini	0:9fca2b23d0ba	4659	else if( ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_EXPIRED )
marcozecchini	0:9fca2b23d0ba	4660	alert = MBEDTLS_SSL_ALERT_MSG_CERT_EXPIRED;
marcozecchini	0:9fca2b23d0ba	4661	else if( ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_REVOKED )
marcozecchini	0:9fca2b23d0ba	4662	alert = MBEDTLS_SSL_ALERT_MSG_CERT_REVOKED;
marcozecchini	0:9fca2b23d0ba	4663	else if( ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_NOT_TRUSTED )
marcozecchini	0:9fca2b23d0ba	4664	alert = MBEDTLS_SSL_ALERT_MSG_UNKNOWN_CA;
marcozecchini	0:9fca2b23d0ba	4665	else
marcozecchini	0:9fca2b23d0ba	4666	alert = MBEDTLS_SSL_ALERT_MSG_CERT_UNKNOWN;
marcozecchini	0:9fca2b23d0ba	4667	mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
marcozecchini	0:9fca2b23d0ba	4668	alert );
marcozecchini	0:9fca2b23d0ba	4669	}
marcozecchini	0:9fca2b23d0ba	4670
marcozecchini	0:9fca2b23d0ba	4671	#if defined(MBEDTLS_DEBUG_C)
marcozecchini	0:9fca2b23d0ba	4672	if( ssl->session_negotiate->verify_result != 0 )
marcozecchini	0:9fca2b23d0ba	4673	{
marcozecchini	0:9fca2b23d0ba	4674	MBEDTLS_SSL_DEBUG_MSG( 3, ( "! Certificate verification flags %x",
marcozecchini	0:9fca2b23d0ba	4675	ssl->session_negotiate->verify_result ) );
marcozecchini	0:9fca2b23d0ba	4676	}
marcozecchini	0:9fca2b23d0ba	4677	else
marcozecchini	0:9fca2b23d0ba	4678	{
marcozecchini	0:9fca2b23d0ba	4679	MBEDTLS_SSL_DEBUG_MSG( 3, ( "Certificate verification flags clear" ) );
marcozecchini	0:9fca2b23d0ba	4680	}
marcozecchini	0:9fca2b23d0ba	4681	#endif /* MBEDTLS_DEBUG_C */
marcozecchini	0:9fca2b23d0ba	4682	}
marcozecchini	0:9fca2b23d0ba	4683
marcozecchini	0:9fca2b23d0ba	4684	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= parse certificate" ) );
marcozecchini	0:9fca2b23d0ba	4685
marcozecchini	0:9fca2b23d0ba	4686	return( ret );
marcozecchini	0:9fca2b23d0ba	4687	}
marcozecchini	0:9fca2b23d0ba	4688	#endif /* !MBEDTLS_KEY_EXCHANGE_RSA_ENABLED
marcozecchini	0:9fca2b23d0ba	4689	!MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED
marcozecchini	0:9fca2b23d0ba	4690	!MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED
marcozecchini	0:9fca2b23d0ba	4691	!MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED
marcozecchini	0:9fca2b23d0ba	4692	!MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED
marcozecchini	0:9fca2b23d0ba	4693	!MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED
marcozecchini	0:9fca2b23d0ba	4694	!MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED */
marcozecchini	0:9fca2b23d0ba	4695
marcozecchini	0:9fca2b23d0ba	4696	int mbedtls_ssl_write_change_cipher_spec( mbedtls_ssl_context *ssl )
marcozecchini	0:9fca2b23d0ba	4697	{
marcozecchini	0:9fca2b23d0ba	4698	int ret;
marcozecchini	0:9fca2b23d0ba	4699
marcozecchini	0:9fca2b23d0ba	4700	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write change cipher spec" ) );
marcozecchini	0:9fca2b23d0ba	4701
marcozecchini	0:9fca2b23d0ba	4702	ssl->out_msgtype = MBEDTLS_SSL_MSG_CHANGE_CIPHER_SPEC;
marcozecchini	0:9fca2b23d0ba	4703	ssl->out_msglen = 1;
marcozecchini	0:9fca2b23d0ba	4704	ssl->out_msg[0] = 1;
marcozecchini	0:9fca2b23d0ba	4705
marcozecchini	0:9fca2b23d0ba	4706	ssl->state++;
marcozecchini	0:9fca2b23d0ba	4707
marcozecchini	0:9fca2b23d0ba	4708	if( ( ret = mbedtls_ssl_write_record( ssl ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	4709	{
marcozecchini	0:9fca2b23d0ba	4710	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_write_record", ret );
marcozecchini	0:9fca2b23d0ba	4711	return( ret );
marcozecchini	0:9fca2b23d0ba	4712	}
marcozecchini	0:9fca2b23d0ba	4713
marcozecchini	0:9fca2b23d0ba	4714	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= write change cipher spec" ) );
marcozecchini	0:9fca2b23d0ba	4715
marcozecchini	0:9fca2b23d0ba	4716	return( 0 );
marcozecchini	0:9fca2b23d0ba	4717	}
marcozecchini	0:9fca2b23d0ba	4718
marcozecchini	0:9fca2b23d0ba	4719	int mbedtls_ssl_parse_change_cipher_spec( mbedtls_ssl_context *ssl )
marcozecchini	0:9fca2b23d0ba	4720	{
marcozecchini	0:9fca2b23d0ba	4721	int ret;
marcozecchini	0:9fca2b23d0ba	4722
marcozecchini	0:9fca2b23d0ba	4723	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> parse change cipher spec" ) );
marcozecchini	0:9fca2b23d0ba	4724
marcozecchini	0:9fca2b23d0ba	4725	if( ( ret = mbedtls_ssl_read_record( ssl ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	4726	{
marcozecchini	0:9fca2b23d0ba	4727	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_read_record", ret );
marcozecchini	0:9fca2b23d0ba	4728	return( ret );
marcozecchini	0:9fca2b23d0ba	4729	}
marcozecchini	0:9fca2b23d0ba	4730
marcozecchini	0:9fca2b23d0ba	4731	if( ssl->in_msgtype != MBEDTLS_SSL_MSG_CHANGE_CIPHER_SPEC )
marcozecchini	0:9fca2b23d0ba	4732	{
marcozecchini	0:9fca2b23d0ba	4733	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad change cipher spec message" ) );
marcozecchini	0:9fca2b23d0ba	4734	mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
marcozecchini	0:9fca2b23d0ba	4735	MBEDTLS_SSL_ALERT_MSG_UNEXPECTED_MESSAGE );
marcozecchini	0:9fca2b23d0ba	4736	return( MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE );
marcozecchini	0:9fca2b23d0ba	4737	}
marcozecchini	0:9fca2b23d0ba	4738
marcozecchini	0:9fca2b23d0ba	4739	if( ssl->in_msglen != 1 \|\| ssl->in_msg[0] != 1 )
marcozecchini	0:9fca2b23d0ba	4740	{
marcozecchini	0:9fca2b23d0ba	4741	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad change cipher spec message" ) );
marcozecchini	0:9fca2b23d0ba	4742	mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
marcozecchini	0:9fca2b23d0ba	4743	MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
marcozecchini	0:9fca2b23d0ba	4744	return( MBEDTLS_ERR_SSL_BAD_HS_CHANGE_CIPHER_SPEC );
marcozecchini	0:9fca2b23d0ba	4745	}
marcozecchini	0:9fca2b23d0ba	4746
marcozecchini	0:9fca2b23d0ba	4747	/*
marcozecchini	0:9fca2b23d0ba	4748	* Switch to our negotiated transform and session parameters for inbound
marcozecchini	0:9fca2b23d0ba	4749	* data.
marcozecchini	0:9fca2b23d0ba	4750	*/
marcozecchini	0:9fca2b23d0ba	4751	MBEDTLS_SSL_DEBUG_MSG( 3, ( "switching to new transform spec for inbound data" ) );
marcozecchini	0:9fca2b23d0ba	4752	ssl->transform_in = ssl->transform_negotiate;
marcozecchini	0:9fca2b23d0ba	4753	ssl->session_in = ssl->session_negotiate;
marcozecchini	0:9fca2b23d0ba	4754
marcozecchini	0:9fca2b23d0ba	4755	#if defined(MBEDTLS_SSL_PROTO_DTLS)
marcozecchini	0:9fca2b23d0ba	4756	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
marcozecchini	0:9fca2b23d0ba	4757	{
marcozecchini	0:9fca2b23d0ba	4758	#if defined(MBEDTLS_SSL_DTLS_ANTI_REPLAY)
marcozecchini	0:9fca2b23d0ba	4759	ssl_dtls_replay_reset( ssl );
marcozecchini	0:9fca2b23d0ba	4760	#endif
marcozecchini	0:9fca2b23d0ba	4761
marcozecchini	0:9fca2b23d0ba	4762	/* Increment epoch */
marcozecchini	0:9fca2b23d0ba	4763	if( ++ssl->in_epoch == 0 )
marcozecchini	0:9fca2b23d0ba	4764	{
marcozecchini	0:9fca2b23d0ba	4765	MBEDTLS_SSL_DEBUG_MSG( 1, ( "DTLS epoch would wrap" ) );
marcozecchini	0:9fca2b23d0ba	4766	/* This is highly unlikely to happen for legitimate reasons, so
marcozecchini	0:9fca2b23d0ba	4767	treat it as an attack and don't send an alert. */
marcozecchini	0:9fca2b23d0ba	4768	return( MBEDTLS_ERR_SSL_COUNTER_WRAPPING );
marcozecchini	0:9fca2b23d0ba	4769	}
marcozecchini	0:9fca2b23d0ba	4770	}
marcozecchini	0:9fca2b23d0ba	4771	else
marcozecchini	0:9fca2b23d0ba	4772	#endif /* MBEDTLS_SSL_PROTO_DTLS */
marcozecchini	0:9fca2b23d0ba	4773	memset( ssl->in_ctr, 0, 8 );
marcozecchini	0:9fca2b23d0ba	4774
marcozecchini	0:9fca2b23d0ba	4775	/*
marcozecchini	0:9fca2b23d0ba	4776	* Set the in_msg pointer to the correct location based on IV length
marcozecchini	0:9fca2b23d0ba	4777	*/
marcozecchini	0:9fca2b23d0ba	4778	if( ssl->minor_ver >= MBEDTLS_SSL_MINOR_VERSION_2 )
marcozecchini	0:9fca2b23d0ba	4779	{
marcozecchini	0:9fca2b23d0ba	4780	ssl->in_msg = ssl->in_iv + ssl->transform_negotiate->ivlen -
marcozecchini	0:9fca2b23d0ba	4781	ssl->transform_negotiate->fixed_ivlen;
marcozecchini	0:9fca2b23d0ba	4782	}
marcozecchini	0:9fca2b23d0ba	4783	else
marcozecchini	0:9fca2b23d0ba	4784	ssl->in_msg = ssl->in_iv;
marcozecchini	0:9fca2b23d0ba	4785
marcozecchini	0:9fca2b23d0ba	4786	#if defined(MBEDTLS_SSL_HW_RECORD_ACCEL)
marcozecchini	0:9fca2b23d0ba	4787	if( mbedtls_ssl_hw_record_activate != NULL )
marcozecchini	0:9fca2b23d0ba	4788	{
marcozecchini	0:9fca2b23d0ba	4789	if( ( ret = mbedtls_ssl_hw_record_activate( ssl, MBEDTLS_SSL_CHANNEL_INBOUND ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	4790	{
marcozecchini	0:9fca2b23d0ba	4791	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_hw_record_activate", ret );
marcozecchini	0:9fca2b23d0ba	4792	mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
marcozecchini	0:9fca2b23d0ba	4793	MBEDTLS_SSL_ALERT_MSG_INTERNAL_ERROR );
marcozecchini	0:9fca2b23d0ba	4794	return( MBEDTLS_ERR_SSL_HW_ACCEL_FAILED );
marcozecchini	0:9fca2b23d0ba	4795	}
marcozecchini	0:9fca2b23d0ba	4796	}
marcozecchini	0:9fca2b23d0ba	4797	#endif
marcozecchini	0:9fca2b23d0ba	4798
marcozecchini	0:9fca2b23d0ba	4799	ssl->state++;
marcozecchini	0:9fca2b23d0ba	4800
marcozecchini	0:9fca2b23d0ba	4801	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= parse change cipher spec" ) );
marcozecchini	0:9fca2b23d0ba	4802
marcozecchini	0:9fca2b23d0ba	4803	return( 0 );
marcozecchini	0:9fca2b23d0ba	4804	}
marcozecchini	0:9fca2b23d0ba	4805
marcozecchini	0:9fca2b23d0ba	4806	void mbedtls_ssl_optimize_checksum( mbedtls_ssl_context *ssl,
marcozecchini	0:9fca2b23d0ba	4807	const mbedtls_ssl_ciphersuite_t *ciphersuite_info )
marcozecchini	0:9fca2b23d0ba	4808	{
marcozecchini	0:9fca2b23d0ba	4809	((void) ciphersuite_info);
marcozecchini	0:9fca2b23d0ba	4810
marcozecchini	0:9fca2b23d0ba	4811	#if defined(MBEDTLS_SSL_PROTO_SSL3) \|\| defined(MBEDTLS_SSL_PROTO_TLS1) \|\| \
marcozecchini	0:9fca2b23d0ba	4812	defined(MBEDTLS_SSL_PROTO_TLS1_1)
marcozecchini	0:9fca2b23d0ba	4813	if( ssl->minor_ver < MBEDTLS_SSL_MINOR_VERSION_3 )
marcozecchini	0:9fca2b23d0ba	4814	ssl->handshake->update_checksum = ssl_update_checksum_md5sha1;
marcozecchini	0:9fca2b23d0ba	4815	else
marcozecchini	0:9fca2b23d0ba	4816	#endif
marcozecchini	0:9fca2b23d0ba	4817	#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
marcozecchini	0:9fca2b23d0ba	4818	#if defined(MBEDTLS_SHA512_C)
marcozecchini	0:9fca2b23d0ba	4819	if( ciphersuite_info->mac == MBEDTLS_MD_SHA384 )
marcozecchini	0:9fca2b23d0ba	4820	ssl->handshake->update_checksum = ssl_update_checksum_sha384;
marcozecchini	0:9fca2b23d0ba	4821	else
marcozecchini	0:9fca2b23d0ba	4822	#endif
marcozecchini	0:9fca2b23d0ba	4823	#if defined(MBEDTLS_SHA256_C)
marcozecchini	0:9fca2b23d0ba	4824	if( ciphersuite_info->mac != MBEDTLS_MD_SHA384 )
marcozecchini	0:9fca2b23d0ba	4825	ssl->handshake->update_checksum = ssl_update_checksum_sha256;
marcozecchini	0:9fca2b23d0ba	4826	else
marcozecchini	0:9fca2b23d0ba	4827	#endif
marcozecchini	0:9fca2b23d0ba	4828	#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
marcozecchini	0:9fca2b23d0ba	4829	{
marcozecchini	0:9fca2b23d0ba	4830	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
marcozecchini	0:9fca2b23d0ba	4831	return;
marcozecchini	0:9fca2b23d0ba	4832	}
marcozecchini	0:9fca2b23d0ba	4833	}
marcozecchini	0:9fca2b23d0ba	4834
marcozecchini	0:9fca2b23d0ba	4835	void mbedtls_ssl_reset_checksum( mbedtls_ssl_context *ssl )
marcozecchini	0:9fca2b23d0ba	4836	{
marcozecchini	0:9fca2b23d0ba	4837	#if defined(MBEDTLS_SSL_PROTO_SSL3) \|\| defined(MBEDTLS_SSL_PROTO_TLS1) \|\| \
marcozecchini	0:9fca2b23d0ba	4838	defined(MBEDTLS_SSL_PROTO_TLS1_1)
marcozecchini	0:9fca2b23d0ba	4839	mbedtls_md5_starts( &ssl->handshake->fin_md5 );
marcozecchini	0:9fca2b23d0ba	4840	mbedtls_sha1_starts( &ssl->handshake->fin_sha1 );
marcozecchini	0:9fca2b23d0ba	4841	#endif
marcozecchini	0:9fca2b23d0ba	4842	#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
marcozecchini	0:9fca2b23d0ba	4843	#if defined(MBEDTLS_SHA256_C)
marcozecchini	0:9fca2b23d0ba	4844	mbedtls_sha256_starts( &ssl->handshake->fin_sha256, 0 );
marcozecchini	0:9fca2b23d0ba	4845	#endif
marcozecchini	0:9fca2b23d0ba	4846	#if defined(MBEDTLS_SHA512_C)
marcozecchini	0:9fca2b23d0ba	4847	mbedtls_sha512_starts( &ssl->handshake->fin_sha512, 1 );
marcozecchini	0:9fca2b23d0ba	4848	#endif
marcozecchini	0:9fca2b23d0ba	4849	#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
marcozecchini	0:9fca2b23d0ba	4850	}
marcozecchini	0:9fca2b23d0ba	4851
marcozecchini	0:9fca2b23d0ba	4852	static void ssl_update_checksum_start( mbedtls_ssl_context *ssl,
marcozecchini	0:9fca2b23d0ba	4853	const unsigned char *buf, size_t len )
marcozecchini	0:9fca2b23d0ba	4854	{
marcozecchini	0:9fca2b23d0ba	4855	#if defined(MBEDTLS_SSL_PROTO_SSL3) \|\| defined(MBEDTLS_SSL_PROTO_TLS1) \|\| \
marcozecchini	0:9fca2b23d0ba	4856	defined(MBEDTLS_SSL_PROTO_TLS1_1)
marcozecchini	0:9fca2b23d0ba	4857	mbedtls_md5_update( &ssl->handshake->fin_md5 , buf, len );
marcozecchini	0:9fca2b23d0ba	4858	mbedtls_sha1_update( &ssl->handshake->fin_sha1, buf, len );
marcozecchini	0:9fca2b23d0ba	4859	#endif
marcozecchini	0:9fca2b23d0ba	4860	#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
marcozecchini	0:9fca2b23d0ba	4861	#if defined(MBEDTLS_SHA256_C)
marcozecchini	0:9fca2b23d0ba	4862	mbedtls_sha256_update( &ssl->handshake->fin_sha256, buf, len );
marcozecchini	0:9fca2b23d0ba	4863	#endif
marcozecchini	0:9fca2b23d0ba	4864	#if defined(MBEDTLS_SHA512_C)
marcozecchini	0:9fca2b23d0ba	4865	mbedtls_sha512_update( &ssl->handshake->fin_sha512, buf, len );
marcozecchini	0:9fca2b23d0ba	4866	#endif
marcozecchini	0:9fca2b23d0ba	4867	#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
marcozecchini	0:9fca2b23d0ba	4868	}
marcozecchini	0:9fca2b23d0ba	4869
marcozecchini	0:9fca2b23d0ba	4870	#if defined(MBEDTLS_SSL_PROTO_SSL3) \|\| defined(MBEDTLS_SSL_PROTO_TLS1) \|\| \
marcozecchini	0:9fca2b23d0ba	4871	defined(MBEDTLS_SSL_PROTO_TLS1_1)
marcozecchini	0:9fca2b23d0ba	4872	static void ssl_update_checksum_md5sha1( mbedtls_ssl_context *ssl,
marcozecchini	0:9fca2b23d0ba	4873	const unsigned char *buf, size_t len )
marcozecchini	0:9fca2b23d0ba	4874	{
marcozecchini	0:9fca2b23d0ba	4875	mbedtls_md5_update( &ssl->handshake->fin_md5 , buf, len );
marcozecchini	0:9fca2b23d0ba	4876	mbedtls_sha1_update( &ssl->handshake->fin_sha1, buf, len );
marcozecchini	0:9fca2b23d0ba	4877	}
marcozecchini	0:9fca2b23d0ba	4878	#endif
marcozecchini	0:9fca2b23d0ba	4879
marcozecchini	0:9fca2b23d0ba	4880	#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
marcozecchini	0:9fca2b23d0ba	4881	#if defined(MBEDTLS_SHA256_C)
marcozecchini	0:9fca2b23d0ba	4882	static void ssl_update_checksum_sha256( mbedtls_ssl_context *ssl,
marcozecchini	0:9fca2b23d0ba	4883	const unsigned char *buf, size_t len )
marcozecchini	0:9fca2b23d0ba	4884	{
marcozecchini	0:9fca2b23d0ba	4885	mbedtls_sha256_update( &ssl->handshake->fin_sha256, buf, len );
marcozecchini	0:9fca2b23d0ba	4886	}
marcozecchini	0:9fca2b23d0ba	4887	#endif
marcozecchini	0:9fca2b23d0ba	4888
marcozecchini	0:9fca2b23d0ba	4889	#if defined(MBEDTLS_SHA512_C)
marcozecchini	0:9fca2b23d0ba	4890	static void ssl_update_checksum_sha384( mbedtls_ssl_context *ssl,
marcozecchini	0:9fca2b23d0ba	4891	const unsigned char *buf, size_t len )
marcozecchini	0:9fca2b23d0ba	4892	{
marcozecchini	0:9fca2b23d0ba	4893	mbedtls_sha512_update( &ssl->handshake->fin_sha512, buf, len );
marcozecchini	0:9fca2b23d0ba	4894	}
marcozecchini	0:9fca2b23d0ba	4895	#endif
marcozecchini	0:9fca2b23d0ba	4896	#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
marcozecchini	0:9fca2b23d0ba	4897
marcozecchini	0:9fca2b23d0ba	4898	#if defined(MBEDTLS_SSL_PROTO_SSL3)
marcozecchini	0:9fca2b23d0ba	4899	static void ssl_calc_finished_ssl(
marcozecchini	0:9fca2b23d0ba	4900	mbedtls_ssl_context ssl, unsigned char buf, int from )
marcozecchini	0:9fca2b23d0ba	4901	{
marcozecchini	0:9fca2b23d0ba	4902	const char *sender;
marcozecchini	0:9fca2b23d0ba	4903	mbedtls_md5_context md5;
marcozecchini	0:9fca2b23d0ba	4904	mbedtls_sha1_context sha1;
marcozecchini	0:9fca2b23d0ba	4905
marcozecchini	0:9fca2b23d0ba	4906	unsigned char padbuf[48];
marcozecchini	0:9fca2b23d0ba	4907	unsigned char md5sum[16];
marcozecchini	0:9fca2b23d0ba	4908	unsigned char sha1sum[20];
marcozecchini	0:9fca2b23d0ba	4909
marcozecchini	0:9fca2b23d0ba	4910	mbedtls_ssl_session *session = ssl->session_negotiate;
marcozecchini	0:9fca2b23d0ba	4911	if( !session )
marcozecchini	0:9fca2b23d0ba	4912	session = ssl->session;
marcozecchini	0:9fca2b23d0ba	4913
marcozecchini	0:9fca2b23d0ba	4914	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> calc finished ssl" ) );
marcozecchini	0:9fca2b23d0ba	4915
marcozecchini	0:9fca2b23d0ba	4916	mbedtls_md5_init( &md5 );
marcozecchini	0:9fca2b23d0ba	4917	mbedtls_sha1_init( &sha1 );
marcozecchini	0:9fca2b23d0ba	4918
marcozecchini	0:9fca2b23d0ba	4919	mbedtls_md5_clone( &md5, &ssl->handshake->fin_md5 );
marcozecchini	0:9fca2b23d0ba	4920	mbedtls_sha1_clone( &sha1, &ssl->handshake->fin_sha1 );
marcozecchini	0:9fca2b23d0ba	4921
marcozecchini	0:9fca2b23d0ba	4922	/*
marcozecchini	0:9fca2b23d0ba	4923	* SSLv3:
marcozecchini	0:9fca2b23d0ba	4924	* hash =
marcozecchini	0:9fca2b23d0ba	4925	* MD5( master + pad2 +
marcozecchini	0:9fca2b23d0ba	4926	* MD5( handshake + sender + master + pad1 ) )
marcozecchini	0:9fca2b23d0ba	4927	* + SHA1( master + pad2 +
marcozecchini	0:9fca2b23d0ba	4928	* SHA1( handshake + sender + master + pad1 ) )
marcozecchini	0:9fca2b23d0ba	4929	*/
marcozecchini	0:9fca2b23d0ba	4930
marcozecchini	0:9fca2b23d0ba	4931	#if !defined(MBEDTLS_MD5_ALT)
marcozecchini	0:9fca2b23d0ba	4932	MBEDTLS_SSL_DEBUG_BUF( 4, "finished md5 state", (unsigned char *)
marcozecchini	0:9fca2b23d0ba	4933	md5.state, sizeof( md5.state ) );
marcozecchini	0:9fca2b23d0ba	4934	#endif
marcozecchini	0:9fca2b23d0ba	4935
marcozecchini	0:9fca2b23d0ba	4936	#if !defined(MBEDTLS_SHA1_ALT)
marcozecchini	0:9fca2b23d0ba	4937	MBEDTLS_SSL_DEBUG_BUF( 4, "finished sha1 state", (unsigned char *)
marcozecchini	0:9fca2b23d0ba	4938	sha1.state, sizeof( sha1.state ) );
marcozecchini	0:9fca2b23d0ba	4939	#endif
marcozecchini	0:9fca2b23d0ba	4940
marcozecchini	0:9fca2b23d0ba	4941	sender = ( from == MBEDTLS_SSL_IS_CLIENT ) ? "CLNT"
marcozecchini	0:9fca2b23d0ba	4942	: "SRVR";
marcozecchini	0:9fca2b23d0ba	4943
marcozecchini	0:9fca2b23d0ba	4944	memset( padbuf, 0x36, 48 );
marcozecchini	0:9fca2b23d0ba	4945
marcozecchini	0:9fca2b23d0ba	4946	mbedtls_md5_update( &md5, (const unsigned char *) sender, 4 );
marcozecchini	0:9fca2b23d0ba	4947	mbedtls_md5_update( &md5, session->master, 48 );
marcozecchini	0:9fca2b23d0ba	4948	mbedtls_md5_update( &md5, padbuf, 48 );
marcozecchini	0:9fca2b23d0ba	4949	mbedtls_md5_finish( &md5, md5sum );
marcozecchini	0:9fca2b23d0ba	4950
marcozecchini	0:9fca2b23d0ba	4951	mbedtls_sha1_update( &sha1, (const unsigned char *) sender, 4 );
marcozecchini	0:9fca2b23d0ba	4952	mbedtls_sha1_update( &sha1, session->master, 48 );
marcozecchini	0:9fca2b23d0ba	4953	mbedtls_sha1_update( &sha1, padbuf, 40 );
marcozecchini	0:9fca2b23d0ba	4954	mbedtls_sha1_finish( &sha1, sha1sum );
marcozecchini	0:9fca2b23d0ba	4955
marcozecchini	0:9fca2b23d0ba	4956	memset( padbuf, 0x5C, 48 );
marcozecchini	0:9fca2b23d0ba	4957
marcozecchini	0:9fca2b23d0ba	4958	mbedtls_md5_starts( &md5 );
marcozecchini	0:9fca2b23d0ba	4959	mbedtls_md5_update( &md5, session->master, 48 );
marcozecchini	0:9fca2b23d0ba	4960	mbedtls_md5_update( &md5, padbuf, 48 );
marcozecchini	0:9fca2b23d0ba	4961	mbedtls_md5_update( &md5, md5sum, 16 );
marcozecchini	0:9fca2b23d0ba	4962	mbedtls_md5_finish( &md5, buf );
marcozecchini	0:9fca2b23d0ba	4963
marcozecchini	0:9fca2b23d0ba	4964	mbedtls_sha1_starts( &sha1 );
marcozecchini	0:9fca2b23d0ba	4965	mbedtls_sha1_update( &sha1, session->master, 48 );
marcozecchini	0:9fca2b23d0ba	4966	mbedtls_sha1_update( &sha1, padbuf , 40 );
marcozecchini	0:9fca2b23d0ba	4967	mbedtls_sha1_update( &sha1, sha1sum, 20 );
marcozecchini	0:9fca2b23d0ba	4968	mbedtls_sha1_finish( &sha1, buf + 16 );
marcozecchini	0:9fca2b23d0ba	4969
marcozecchini	0:9fca2b23d0ba	4970	MBEDTLS_SSL_DEBUG_BUF( 3, "calc finished result", buf, 36 );
marcozecchini	0:9fca2b23d0ba	4971
marcozecchini	0:9fca2b23d0ba	4972	mbedtls_md5_free( &md5 );
marcozecchini	0:9fca2b23d0ba	4973	mbedtls_sha1_free( &sha1 );
marcozecchini	0:9fca2b23d0ba	4974
marcozecchini	0:9fca2b23d0ba	4975	mbedtls_zeroize( padbuf, sizeof( padbuf ) );
marcozecchini	0:9fca2b23d0ba	4976	mbedtls_zeroize( md5sum, sizeof( md5sum ) );
marcozecchini	0:9fca2b23d0ba	4977	mbedtls_zeroize( sha1sum, sizeof( sha1sum ) );
marcozecchini	0:9fca2b23d0ba	4978
marcozecchini	0:9fca2b23d0ba	4979	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= calc finished" ) );
marcozecchini	0:9fca2b23d0ba	4980	}
marcozecchini	0:9fca2b23d0ba	4981	#endif /* MBEDTLS_SSL_PROTO_SSL3 */
marcozecchini	0:9fca2b23d0ba	4982
marcozecchini	0:9fca2b23d0ba	4983	#if defined(MBEDTLS_SSL_PROTO_TLS1) \|\| defined(MBEDTLS_SSL_PROTO_TLS1_1)
marcozecchini	0:9fca2b23d0ba	4984	static void ssl_calc_finished_tls(
marcozecchini	0:9fca2b23d0ba	4985	mbedtls_ssl_context ssl, unsigned char buf, int from )
marcozecchini	0:9fca2b23d0ba	4986	{
marcozecchini	0:9fca2b23d0ba	4987	int len = 12;
marcozecchini	0:9fca2b23d0ba	4988	const char *sender;
marcozecchini	0:9fca2b23d0ba	4989	mbedtls_md5_context md5;
marcozecchini	0:9fca2b23d0ba	4990	mbedtls_sha1_context sha1;
marcozecchini	0:9fca2b23d0ba	4991	unsigned char padbuf[36];
marcozecchini	0:9fca2b23d0ba	4992
marcozecchini	0:9fca2b23d0ba	4993	mbedtls_ssl_session *session = ssl->session_negotiate;
marcozecchini	0:9fca2b23d0ba	4994	if( !session )
marcozecchini	0:9fca2b23d0ba	4995	session = ssl->session;
marcozecchini	0:9fca2b23d0ba	4996
marcozecchini	0:9fca2b23d0ba	4997	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> calc finished tls" ) );
marcozecchini	0:9fca2b23d0ba	4998
marcozecchini	0:9fca2b23d0ba	4999	mbedtls_md5_init( &md5 );
marcozecchini	0:9fca2b23d0ba	5000	mbedtls_sha1_init( &sha1 );
marcozecchini	0:9fca2b23d0ba	5001
marcozecchini	0:9fca2b23d0ba	5002	mbedtls_md5_clone( &md5, &ssl->handshake->fin_md5 );
marcozecchini	0:9fca2b23d0ba	5003	mbedtls_sha1_clone( &sha1, &ssl->handshake->fin_sha1 );
marcozecchini	0:9fca2b23d0ba	5004
marcozecchini	0:9fca2b23d0ba	5005	/*
marcozecchini	0:9fca2b23d0ba	5006	* TLSv1:
marcozecchini	0:9fca2b23d0ba	5007	* hash = PRF( master, finished_label,
marcozecchini	0:9fca2b23d0ba	5008	* MD5( handshake ) + SHA1( handshake ) )[0..11]
marcozecchini	0:9fca2b23d0ba	5009	*/
marcozecchini	0:9fca2b23d0ba	5010
marcozecchini	0:9fca2b23d0ba	5011	#if !defined(MBEDTLS_MD5_ALT)
marcozecchini	0:9fca2b23d0ba	5012	MBEDTLS_SSL_DEBUG_BUF( 4, "finished md5 state", (unsigned char *)
marcozecchini	0:9fca2b23d0ba	5013	md5.state, sizeof( md5.state ) );
marcozecchini	0:9fca2b23d0ba	5014	#endif
marcozecchini	0:9fca2b23d0ba	5015
marcozecchini	0:9fca2b23d0ba	5016	#if !defined(MBEDTLS_SHA1_ALT)
marcozecchini	0:9fca2b23d0ba	5017	MBEDTLS_SSL_DEBUG_BUF( 4, "finished sha1 state", (unsigned char *)
marcozecchini	0:9fca2b23d0ba	5018	sha1.state, sizeof( sha1.state ) );
marcozecchini	0:9fca2b23d0ba	5019	#endif
marcozecchini	0:9fca2b23d0ba	5020
marcozecchini	0:9fca2b23d0ba	5021	sender = ( from == MBEDTLS_SSL_IS_CLIENT )
marcozecchini	0:9fca2b23d0ba	5022	? "client finished"
marcozecchini	0:9fca2b23d0ba	5023	: "server finished";
marcozecchini	0:9fca2b23d0ba	5024
marcozecchini	0:9fca2b23d0ba	5025	mbedtls_md5_finish( &md5, padbuf );
marcozecchini	0:9fca2b23d0ba	5026	mbedtls_sha1_finish( &sha1, padbuf + 16 );
marcozecchini	0:9fca2b23d0ba	5027
marcozecchini	0:9fca2b23d0ba	5028	ssl->handshake->tls_prf( session->master, 48, sender,
marcozecchini	0:9fca2b23d0ba	5029	padbuf, 36, buf, len );
marcozecchini	0:9fca2b23d0ba	5030
marcozecchini	0:9fca2b23d0ba	5031	MBEDTLS_SSL_DEBUG_BUF( 3, "calc finished result", buf, len );
marcozecchini	0:9fca2b23d0ba	5032
marcozecchini	0:9fca2b23d0ba	5033	mbedtls_md5_free( &md5 );
marcozecchini	0:9fca2b23d0ba	5034	mbedtls_sha1_free( &sha1 );
marcozecchini	0:9fca2b23d0ba	5035
marcozecchini	0:9fca2b23d0ba	5036	mbedtls_zeroize( padbuf, sizeof( padbuf ) );
marcozecchini	0:9fca2b23d0ba	5037
marcozecchini	0:9fca2b23d0ba	5038	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= calc finished" ) );
marcozecchini	0:9fca2b23d0ba	5039	}
marcozecchini	0:9fca2b23d0ba	5040	#endif /* MBEDTLS_SSL_PROTO_TLS1 \|\| MBEDTLS_SSL_PROTO_TLS1_1 */
marcozecchini	0:9fca2b23d0ba	5041
marcozecchini	0:9fca2b23d0ba	5042	#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
marcozecchini	0:9fca2b23d0ba	5043	#if defined(MBEDTLS_SHA256_C)
marcozecchini	0:9fca2b23d0ba	5044	static void ssl_calc_finished_tls_sha256(
marcozecchini	0:9fca2b23d0ba	5045	mbedtls_ssl_context ssl, unsigned char buf, int from )
marcozecchini	0:9fca2b23d0ba	5046	{
marcozecchini	0:9fca2b23d0ba	5047	int len = 12;
marcozecchini	0:9fca2b23d0ba	5048	const char *sender;
marcozecchini	0:9fca2b23d0ba	5049	mbedtls_sha256_context sha256;
marcozecchini	0:9fca2b23d0ba	5050	unsigned char padbuf[32];
marcozecchini	0:9fca2b23d0ba	5051
marcozecchini	0:9fca2b23d0ba	5052	mbedtls_ssl_session *session = ssl->session_negotiate;
marcozecchini	0:9fca2b23d0ba	5053	if( !session )
marcozecchini	0:9fca2b23d0ba	5054	session = ssl->session;
marcozecchini	0:9fca2b23d0ba	5055
marcozecchini	0:9fca2b23d0ba	5056	mbedtls_sha256_init( &sha256 );
marcozecchini	0:9fca2b23d0ba	5057
marcozecchini	0:9fca2b23d0ba	5058	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> calc finished tls sha256" ) );
marcozecchini	0:9fca2b23d0ba	5059
marcozecchini	0:9fca2b23d0ba	5060	mbedtls_sha256_clone( &sha256, &ssl->handshake->fin_sha256 );
marcozecchini	0:9fca2b23d0ba	5061
marcozecchini	0:9fca2b23d0ba	5062	/*
marcozecchini	0:9fca2b23d0ba	5063	* TLSv1.2:
marcozecchini	0:9fca2b23d0ba	5064	* hash = PRF( master, finished_label,
marcozecchini	0:9fca2b23d0ba	5065	* Hash( handshake ) )[0.11]
marcozecchini	0:9fca2b23d0ba	5066	*/
marcozecchini	0:9fca2b23d0ba	5067
marcozecchini	0:9fca2b23d0ba	5068	#if !defined(MBEDTLS_SHA256_ALT)
marcozecchini	0:9fca2b23d0ba	5069	MBEDTLS_SSL_DEBUG_BUF( 4, "finished sha2 state", (unsigned char *)
marcozecchini	0:9fca2b23d0ba	5070	sha256.state, sizeof( sha256.state ) );
marcozecchini	0:9fca2b23d0ba	5071	#endif
marcozecchini	0:9fca2b23d0ba	5072
marcozecchini	0:9fca2b23d0ba	5073	sender = ( from == MBEDTLS_SSL_IS_CLIENT )
marcozecchini	0:9fca2b23d0ba	5074	? "client finished"
marcozecchini	0:9fca2b23d0ba	5075	: "server finished";
marcozecchini	0:9fca2b23d0ba	5076
marcozecchini	0:9fca2b23d0ba	5077	mbedtls_sha256_finish( &sha256, padbuf );
marcozecchini	0:9fca2b23d0ba	5078
marcozecchini	0:9fca2b23d0ba	5079	ssl->handshake->tls_prf( session->master, 48, sender,
marcozecchini	0:9fca2b23d0ba	5080	padbuf, 32, buf, len );
marcozecchini	0:9fca2b23d0ba	5081
marcozecchini	0:9fca2b23d0ba	5082	MBEDTLS_SSL_DEBUG_BUF( 3, "calc finished result", buf, len );
marcozecchini	0:9fca2b23d0ba	5083
marcozecchini	0:9fca2b23d0ba	5084	mbedtls_sha256_free( &sha256 );
marcozecchini	0:9fca2b23d0ba	5085
marcozecchini	0:9fca2b23d0ba	5086	mbedtls_zeroize( padbuf, sizeof( padbuf ) );
marcozecchini	0:9fca2b23d0ba	5087
marcozecchini	0:9fca2b23d0ba	5088	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= calc finished" ) );
marcozecchini	0:9fca2b23d0ba	5089	}
marcozecchini	0:9fca2b23d0ba	5090	#endif /* MBEDTLS_SHA256_C */
marcozecchini	0:9fca2b23d0ba	5091
marcozecchini	0:9fca2b23d0ba	5092	#if defined(MBEDTLS_SHA512_C)
marcozecchini	0:9fca2b23d0ba	5093	static void ssl_calc_finished_tls_sha384(
marcozecchini	0:9fca2b23d0ba	5094	mbedtls_ssl_context ssl, unsigned char buf, int from )
marcozecchini	0:9fca2b23d0ba	5095	{
marcozecchini	0:9fca2b23d0ba	5096	int len = 12;
marcozecchini	0:9fca2b23d0ba	5097	const char *sender;
marcozecchini	0:9fca2b23d0ba	5098	mbedtls_sha512_context sha512;
marcozecchini	0:9fca2b23d0ba	5099	unsigned char padbuf[48];
marcozecchini	0:9fca2b23d0ba	5100
marcozecchini	0:9fca2b23d0ba	5101	mbedtls_ssl_session *session = ssl->session_negotiate;
marcozecchini	0:9fca2b23d0ba	5102	if( !session )
marcozecchini	0:9fca2b23d0ba	5103	session = ssl->session;
marcozecchini	0:9fca2b23d0ba	5104
marcozecchini	0:9fca2b23d0ba	5105	mbedtls_sha512_init( &sha512 );
marcozecchini	0:9fca2b23d0ba	5106
marcozecchini	0:9fca2b23d0ba	5107	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> calc finished tls sha384" ) );
marcozecchini	0:9fca2b23d0ba	5108
marcozecchini	0:9fca2b23d0ba	5109	mbedtls_sha512_clone( &sha512, &ssl->handshake->fin_sha512 );
marcozecchini	0:9fca2b23d0ba	5110
marcozecchini	0:9fca2b23d0ba	5111	/*
marcozecchini	0:9fca2b23d0ba	5112	* TLSv1.2:
marcozecchini	0:9fca2b23d0ba	5113	* hash = PRF( master, finished_label,
marcozecchini	0:9fca2b23d0ba	5114	* Hash( handshake ) )[0.11]
marcozecchini	0:9fca2b23d0ba	5115	*/
marcozecchini	0:9fca2b23d0ba	5116
marcozecchini	0:9fca2b23d0ba	5117	#if !defined(MBEDTLS_SHA512_ALT)
marcozecchini	0:9fca2b23d0ba	5118	MBEDTLS_SSL_DEBUG_BUF( 4, "finished sha512 state", (unsigned char *)
marcozecchini	0:9fca2b23d0ba	5119	sha512.state, sizeof( sha512.state ) );
marcozecchini	0:9fca2b23d0ba	5120	#endif
marcozecchini	0:9fca2b23d0ba	5121
marcozecchini	0:9fca2b23d0ba	5122	sender = ( from == MBEDTLS_SSL_IS_CLIENT )
marcozecchini	0:9fca2b23d0ba	5123	? "client finished"
marcozecchini	0:9fca2b23d0ba	5124	: "server finished";
marcozecchini	0:9fca2b23d0ba	5125
marcozecchini	0:9fca2b23d0ba	5126	mbedtls_sha512_finish( &sha512, padbuf );
marcozecchini	0:9fca2b23d0ba	5127
marcozecchini	0:9fca2b23d0ba	5128	ssl->handshake->tls_prf( session->master, 48, sender,
marcozecchini	0:9fca2b23d0ba	5129	padbuf, 48, buf, len );
marcozecchini	0:9fca2b23d0ba	5130
marcozecchini	0:9fca2b23d0ba	5131	MBEDTLS_SSL_DEBUG_BUF( 3, "calc finished result", buf, len );
marcozecchini	0:9fca2b23d0ba	5132
marcozecchini	0:9fca2b23d0ba	5133	mbedtls_sha512_free( &sha512 );
marcozecchini	0:9fca2b23d0ba	5134
marcozecchini	0:9fca2b23d0ba	5135	mbedtls_zeroize( padbuf, sizeof( padbuf ) );
marcozecchini	0:9fca2b23d0ba	5136
marcozecchini	0:9fca2b23d0ba	5137	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= calc finished" ) );
marcozecchini	0:9fca2b23d0ba	5138	}
marcozecchini	0:9fca2b23d0ba	5139	#endif /* MBEDTLS_SHA512_C */
marcozecchini	0:9fca2b23d0ba	5140	#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
marcozecchini	0:9fca2b23d0ba	5141
marcozecchini	0:9fca2b23d0ba	5142	static void ssl_handshake_wrapup_free_hs_transform( mbedtls_ssl_context *ssl )
marcozecchini	0:9fca2b23d0ba	5143	{
marcozecchini	0:9fca2b23d0ba	5144	MBEDTLS_SSL_DEBUG_MSG( 3, ( "=> handshake wrapup: final free" ) );
marcozecchini	0:9fca2b23d0ba	5145
marcozecchini	0:9fca2b23d0ba	5146	/*
marcozecchini	0:9fca2b23d0ba	5147	* Free our handshake params
marcozecchini	0:9fca2b23d0ba	5148	*/
marcozecchini	0:9fca2b23d0ba	5149	mbedtls_ssl_handshake_free( ssl->handshake );
marcozecchini	0:9fca2b23d0ba	5150	mbedtls_free( ssl->handshake );
marcozecchini	0:9fca2b23d0ba	5151	ssl->handshake = NULL;
marcozecchini	0:9fca2b23d0ba	5152
marcozecchini	0:9fca2b23d0ba	5153	/*
marcozecchini	0:9fca2b23d0ba	5154	* Free the previous transform and swith in the current one
marcozecchini	0:9fca2b23d0ba	5155	*/
marcozecchini	0:9fca2b23d0ba	5156	if( ssl->transform )
marcozecchini	0:9fca2b23d0ba	5157	{
marcozecchini	0:9fca2b23d0ba	5158	mbedtls_ssl_transform_free( ssl->transform );
marcozecchini	0:9fca2b23d0ba	5159	mbedtls_free( ssl->transform );
marcozecchini	0:9fca2b23d0ba	5160	}
marcozecchini	0:9fca2b23d0ba	5161	ssl->transform = ssl->transform_negotiate;
marcozecchini	0:9fca2b23d0ba	5162	ssl->transform_negotiate = NULL;
marcozecchini	0:9fca2b23d0ba	5163
marcozecchini	0:9fca2b23d0ba	5164	MBEDTLS_SSL_DEBUG_MSG( 3, ( "<= handshake wrapup: final free" ) );
marcozecchini	0:9fca2b23d0ba	5165	}
marcozecchini	0:9fca2b23d0ba	5166
marcozecchini	0:9fca2b23d0ba	5167	void mbedtls_ssl_handshake_wrapup( mbedtls_ssl_context *ssl )
marcozecchini	0:9fca2b23d0ba	5168	{
marcozecchini	0:9fca2b23d0ba	5169	int resume = ssl->handshake->resume;
marcozecchini	0:9fca2b23d0ba	5170
marcozecchini	0:9fca2b23d0ba	5171	MBEDTLS_SSL_DEBUG_MSG( 3, ( "=> handshake wrapup" ) );
marcozecchini	0:9fca2b23d0ba	5172
marcozecchini	0:9fca2b23d0ba	5173	#if defined(MBEDTLS_SSL_RENEGOTIATION)
marcozecchini	0:9fca2b23d0ba	5174	if( ssl->renego_status == MBEDTLS_SSL_RENEGOTIATION_IN_PROGRESS )
marcozecchini	0:9fca2b23d0ba	5175	{
marcozecchini	0:9fca2b23d0ba	5176	ssl->renego_status = MBEDTLS_SSL_RENEGOTIATION_DONE;
marcozecchini	0:9fca2b23d0ba	5177	ssl->renego_records_seen = 0;
marcozecchini	0:9fca2b23d0ba	5178	}
marcozecchini	0:9fca2b23d0ba	5179	#endif
marcozecchini	0:9fca2b23d0ba	5180
marcozecchini	0:9fca2b23d0ba	5181	/*
marcozecchini	0:9fca2b23d0ba	5182	* Free the previous session and switch in the current one
marcozecchini	0:9fca2b23d0ba	5183	*/
marcozecchini	0:9fca2b23d0ba	5184	if( ssl->session )
marcozecchini	0:9fca2b23d0ba	5185	{
marcozecchini	0:9fca2b23d0ba	5186	#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
marcozecchini	0:9fca2b23d0ba	5187	/* RFC 7366 3.1: keep the EtM state */
marcozecchini	0:9fca2b23d0ba	5188	ssl->session_negotiate->encrypt_then_mac =
marcozecchini	0:9fca2b23d0ba	5189	ssl->session->encrypt_then_mac;
marcozecchini	0:9fca2b23d0ba	5190	#endif
marcozecchini	0:9fca2b23d0ba	5191
marcozecchini	0:9fca2b23d0ba	5192	mbedtls_ssl_session_free( ssl->session );
marcozecchini	0:9fca2b23d0ba	5193	mbedtls_free( ssl->session );
marcozecchini	0:9fca2b23d0ba	5194	}
marcozecchini	0:9fca2b23d0ba	5195	ssl->session = ssl->session_negotiate;
marcozecchini	0:9fca2b23d0ba	5196	ssl->session_negotiate = NULL;
marcozecchini	0:9fca2b23d0ba	5197
marcozecchini	0:9fca2b23d0ba	5198	/*
marcozecchini	0:9fca2b23d0ba	5199	* Add cache entry
marcozecchini	0:9fca2b23d0ba	5200	*/
marcozecchini	0:9fca2b23d0ba	5201	if( ssl->conf->f_set_cache != NULL &&
marcozecchini	0:9fca2b23d0ba	5202	ssl->session->id_len != 0 &&
marcozecchini	0:9fca2b23d0ba	5203	resume == 0 )
marcozecchini	0:9fca2b23d0ba	5204	{
marcozecchini	0:9fca2b23d0ba	5205	if( ssl->conf->f_set_cache( ssl->conf->p_cache, ssl->session ) != 0 )
marcozecchini	0:9fca2b23d0ba	5206	MBEDTLS_SSL_DEBUG_MSG( 1, ( "cache did not store session" ) );
marcozecchini	0:9fca2b23d0ba	5207	}
marcozecchini	0:9fca2b23d0ba	5208
marcozecchini	0:9fca2b23d0ba	5209	#if defined(MBEDTLS_SSL_PROTO_DTLS)
marcozecchini	0:9fca2b23d0ba	5210	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM &&
marcozecchini	0:9fca2b23d0ba	5211	ssl->handshake->flight != NULL )
marcozecchini	0:9fca2b23d0ba	5212	{
marcozecchini	0:9fca2b23d0ba	5213	/* Cancel handshake timer */
marcozecchini	0:9fca2b23d0ba	5214	ssl_set_timer( ssl, 0 );
marcozecchini	0:9fca2b23d0ba	5215
marcozecchini	0:9fca2b23d0ba	5216	/* Keep last flight around in case we need to resend it:
marcozecchini	0:9fca2b23d0ba	5217	* we need the handshake and transform structures for that */
marcozecchini	0:9fca2b23d0ba	5218	MBEDTLS_SSL_DEBUG_MSG( 3, ( "skip freeing handshake and transform" ) );
marcozecchini	0:9fca2b23d0ba	5219	}
marcozecchini	0:9fca2b23d0ba	5220	else
marcozecchini	0:9fca2b23d0ba	5221	#endif
marcozecchini	0:9fca2b23d0ba	5222	ssl_handshake_wrapup_free_hs_transform( ssl );
marcozecchini	0:9fca2b23d0ba	5223
marcozecchini	0:9fca2b23d0ba	5224	ssl->state++;
marcozecchini	0:9fca2b23d0ba	5225
marcozecchini	0:9fca2b23d0ba	5226	MBEDTLS_SSL_DEBUG_MSG( 3, ( "<= handshake wrapup" ) );
marcozecchini	0:9fca2b23d0ba	5227	}
marcozecchini	0:9fca2b23d0ba	5228
marcozecchini	0:9fca2b23d0ba	5229	int mbedtls_ssl_write_finished( mbedtls_ssl_context *ssl )
marcozecchini	0:9fca2b23d0ba	5230	{
marcozecchini	0:9fca2b23d0ba	5231	int ret, hash_len;
marcozecchini	0:9fca2b23d0ba	5232
marcozecchini	0:9fca2b23d0ba	5233	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write finished" ) );
marcozecchini	0:9fca2b23d0ba	5234
marcozecchini	0:9fca2b23d0ba	5235	/*
marcozecchini	0:9fca2b23d0ba	5236	* Set the out_msg pointer to the correct location based on IV length
marcozecchini	0:9fca2b23d0ba	5237	*/
marcozecchini	0:9fca2b23d0ba	5238	if( ssl->minor_ver >= MBEDTLS_SSL_MINOR_VERSION_2 )
marcozecchini	0:9fca2b23d0ba	5239	{
marcozecchini	0:9fca2b23d0ba	5240	ssl->out_msg = ssl->out_iv + ssl->transform_negotiate->ivlen -
marcozecchini	0:9fca2b23d0ba	5241	ssl->transform_negotiate->fixed_ivlen;
marcozecchini	0:9fca2b23d0ba	5242	}
marcozecchini	0:9fca2b23d0ba	5243	else
marcozecchini	0:9fca2b23d0ba	5244	ssl->out_msg = ssl->out_iv;
marcozecchini	0:9fca2b23d0ba	5245
marcozecchini	0:9fca2b23d0ba	5246	ssl->handshake->calc_finished( ssl, ssl->out_msg + 4, ssl->conf->endpoint );
marcozecchini	0:9fca2b23d0ba	5247
marcozecchini	0:9fca2b23d0ba	5248	/*
marcozecchini	0:9fca2b23d0ba	5249	* RFC 5246 7.4.9 (Page 63) says 12 is the default length and ciphersuites
marcozecchini	0:9fca2b23d0ba	5250	* may define some other value. Currently (early 2016), no defined
marcozecchini	0:9fca2b23d0ba	5251	* ciphersuite does this (and this is unlikely to change as activity has
marcozecchini	0:9fca2b23d0ba	5252	* moved to TLS 1.3 now) so we can keep the hardcoded 12 here.
marcozecchini	0:9fca2b23d0ba	5253	*/
marcozecchini	0:9fca2b23d0ba	5254	hash_len = ( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 ) ? 36 : 12;
marcozecchini	0:9fca2b23d0ba	5255
marcozecchini	0:9fca2b23d0ba	5256	#if defined(MBEDTLS_SSL_RENEGOTIATION)
marcozecchini	0:9fca2b23d0ba	5257	ssl->verify_data_len = hash_len;
marcozecchini	0:9fca2b23d0ba	5258	memcpy( ssl->own_verify_data, ssl->out_msg + 4, hash_len );
marcozecchini	0:9fca2b23d0ba	5259	#endif
marcozecchini	0:9fca2b23d0ba	5260
marcozecchini	0:9fca2b23d0ba	5261	ssl->out_msglen = 4 + hash_len;
marcozecchini	0:9fca2b23d0ba	5262	ssl->out_msgtype = MBEDTLS_SSL_MSG_HANDSHAKE;
marcozecchini	0:9fca2b23d0ba	5263	ssl->out_msg[0] = MBEDTLS_SSL_HS_FINISHED;
marcozecchini	0:9fca2b23d0ba	5264
marcozecchini	0:9fca2b23d0ba	5265	/*
marcozecchini	0:9fca2b23d0ba	5266	* In case of session resuming, invert the client and server
marcozecchini	0:9fca2b23d0ba	5267	* ChangeCipherSpec messages order.
marcozecchini	0:9fca2b23d0ba	5268	*/
marcozecchini	0:9fca2b23d0ba	5269	if( ssl->handshake->resume != 0 )
marcozecchini	0:9fca2b23d0ba	5270	{
marcozecchini	0:9fca2b23d0ba	5271	#if defined(MBEDTLS_SSL_CLI_C)
marcozecchini	0:9fca2b23d0ba	5272	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_CLIENT )
marcozecchini	0:9fca2b23d0ba	5273	ssl->state = MBEDTLS_SSL_HANDSHAKE_WRAPUP;
marcozecchini	0:9fca2b23d0ba	5274	#endif
marcozecchini	0:9fca2b23d0ba	5275	#if defined(MBEDTLS_SSL_SRV_C)
marcozecchini	0:9fca2b23d0ba	5276	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER )
marcozecchini	0:9fca2b23d0ba	5277	ssl->state = MBEDTLS_SSL_CLIENT_CHANGE_CIPHER_SPEC;
marcozecchini	0:9fca2b23d0ba	5278	#endif
marcozecchini	0:9fca2b23d0ba	5279	}
marcozecchini	0:9fca2b23d0ba	5280	else
marcozecchini	0:9fca2b23d0ba	5281	ssl->state++;
marcozecchini	0:9fca2b23d0ba	5282
marcozecchini	0:9fca2b23d0ba	5283	/*
marcozecchini	0:9fca2b23d0ba	5284	* Switch to our negotiated transform and session parameters for outbound
marcozecchini	0:9fca2b23d0ba	5285	* data.
marcozecchini	0:9fca2b23d0ba	5286	*/
marcozecchini	0:9fca2b23d0ba	5287	MBEDTLS_SSL_DEBUG_MSG( 3, ( "switching to new transform spec for outbound data" ) );
marcozecchini	0:9fca2b23d0ba	5288
marcozecchini	0:9fca2b23d0ba	5289	#if defined(MBEDTLS_SSL_PROTO_DTLS)
marcozecchini	0:9fca2b23d0ba	5290	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
marcozecchini	0:9fca2b23d0ba	5291	{
marcozecchini	0:9fca2b23d0ba	5292	unsigned char i;
marcozecchini	0:9fca2b23d0ba	5293
marcozecchini	0:9fca2b23d0ba	5294	/* Remember current epoch settings for resending */
marcozecchini	0:9fca2b23d0ba	5295	ssl->handshake->alt_transform_out = ssl->transform_out;
marcozecchini	0:9fca2b23d0ba	5296	memcpy( ssl->handshake->alt_out_ctr, ssl->out_ctr, 8 );
marcozecchini	0:9fca2b23d0ba	5297
marcozecchini	0:9fca2b23d0ba	5298	/* Set sequence_number to zero */
marcozecchini	0:9fca2b23d0ba	5299	memset( ssl->out_ctr + 2, 0, 6 );
marcozecchini	0:9fca2b23d0ba	5300
marcozecchini	0:9fca2b23d0ba	5301	/* Increment epoch */
marcozecchini	0:9fca2b23d0ba	5302	for( i = 2; i > 0; i-- )
marcozecchini	0:9fca2b23d0ba	5303	if( ++ssl->out_ctr[i - 1] != 0 )
marcozecchini	0:9fca2b23d0ba	5304	break;
marcozecchini	0:9fca2b23d0ba	5305
marcozecchini	0:9fca2b23d0ba	5306	/* The loop goes to its end iff the counter is wrapping */
marcozecchini	0:9fca2b23d0ba	5307	if( i == 0 )
marcozecchini	0:9fca2b23d0ba	5308	{
marcozecchini	0:9fca2b23d0ba	5309	MBEDTLS_SSL_DEBUG_MSG( 1, ( "DTLS epoch would wrap" ) );
marcozecchini	0:9fca2b23d0ba	5310	return( MBEDTLS_ERR_SSL_COUNTER_WRAPPING );
marcozecchini	0:9fca2b23d0ba	5311	}
marcozecchini	0:9fca2b23d0ba	5312	}
marcozecchini	0:9fca2b23d0ba	5313	else
marcozecchini	0:9fca2b23d0ba	5314	#endif /* MBEDTLS_SSL_PROTO_DTLS */
marcozecchini	0:9fca2b23d0ba	5315	memset( ssl->out_ctr, 0, 8 );
marcozecchini	0:9fca2b23d0ba	5316
marcozecchini	0:9fca2b23d0ba	5317	ssl->transform_out = ssl->transform_negotiate;
marcozecchini	0:9fca2b23d0ba	5318	ssl->session_out = ssl->session_negotiate;
marcozecchini	0:9fca2b23d0ba	5319
marcozecchini	0:9fca2b23d0ba	5320	#if defined(MBEDTLS_SSL_HW_RECORD_ACCEL)
marcozecchini	0:9fca2b23d0ba	5321	if( mbedtls_ssl_hw_record_activate != NULL )
marcozecchini	0:9fca2b23d0ba	5322	{
marcozecchini	0:9fca2b23d0ba	5323	if( ( ret = mbedtls_ssl_hw_record_activate( ssl, MBEDTLS_SSL_CHANNEL_OUTBOUND ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	5324	{
marcozecchini	0:9fca2b23d0ba	5325	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_hw_record_activate", ret );
marcozecchini	0:9fca2b23d0ba	5326	return( MBEDTLS_ERR_SSL_HW_ACCEL_FAILED );
marcozecchini	0:9fca2b23d0ba	5327	}
marcozecchini	0:9fca2b23d0ba	5328	}
marcozecchini	0:9fca2b23d0ba	5329	#endif
marcozecchini	0:9fca2b23d0ba	5330
marcozecchini	0:9fca2b23d0ba	5331	#if defined(MBEDTLS_SSL_PROTO_DTLS)
marcozecchini	0:9fca2b23d0ba	5332	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
marcozecchini	0:9fca2b23d0ba	5333	mbedtls_ssl_send_flight_completed( ssl );
marcozecchini	0:9fca2b23d0ba	5334	#endif
marcozecchini	0:9fca2b23d0ba	5335
marcozecchini	0:9fca2b23d0ba	5336	if( ( ret = mbedtls_ssl_write_record( ssl ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	5337	{
marcozecchini	0:9fca2b23d0ba	5338	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_write_record", ret );
marcozecchini	0:9fca2b23d0ba	5339	return( ret );
marcozecchini	0:9fca2b23d0ba	5340	}
marcozecchini	0:9fca2b23d0ba	5341
marcozecchini	0:9fca2b23d0ba	5342	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= write finished" ) );
marcozecchini	0:9fca2b23d0ba	5343
marcozecchini	0:9fca2b23d0ba	5344	return( 0 );
marcozecchini	0:9fca2b23d0ba	5345	}
marcozecchini	0:9fca2b23d0ba	5346
marcozecchini	0:9fca2b23d0ba	5347	#if defined(MBEDTLS_SSL_PROTO_SSL3)
marcozecchini	0:9fca2b23d0ba	5348	#define SSL_MAX_HASH_LEN 36
marcozecchini	0:9fca2b23d0ba	5349	#else
marcozecchini	0:9fca2b23d0ba	5350	#define SSL_MAX_HASH_LEN 12
marcozecchini	0:9fca2b23d0ba	5351	#endif
marcozecchini	0:9fca2b23d0ba	5352
marcozecchini	0:9fca2b23d0ba	5353	int mbedtls_ssl_parse_finished( mbedtls_ssl_context *ssl )
marcozecchini	0:9fca2b23d0ba	5354	{
marcozecchini	0:9fca2b23d0ba	5355	int ret;
marcozecchini	0:9fca2b23d0ba	5356	unsigned int hash_len;
marcozecchini	0:9fca2b23d0ba	5357	unsigned char buf[SSL_MAX_HASH_LEN];
marcozecchini	0:9fca2b23d0ba	5358
marcozecchini	0:9fca2b23d0ba	5359	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> parse finished" ) );
marcozecchini	0:9fca2b23d0ba	5360
marcozecchini	0:9fca2b23d0ba	5361	ssl->handshake->calc_finished( ssl, buf, ssl->conf->endpoint ^ 1 );
marcozecchini	0:9fca2b23d0ba	5362
marcozecchini	0:9fca2b23d0ba	5363	if( ( ret = mbedtls_ssl_read_record( ssl ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	5364	{
marcozecchini	0:9fca2b23d0ba	5365	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_read_record", ret );
marcozecchini	0:9fca2b23d0ba	5366	return( ret );
marcozecchini	0:9fca2b23d0ba	5367	}
marcozecchini	0:9fca2b23d0ba	5368
marcozecchini	0:9fca2b23d0ba	5369	if( ssl->in_msgtype != MBEDTLS_SSL_MSG_HANDSHAKE )
marcozecchini	0:9fca2b23d0ba	5370	{
marcozecchini	0:9fca2b23d0ba	5371	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad finished message" ) );
marcozecchini	0:9fca2b23d0ba	5372	mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
marcozecchini	0:9fca2b23d0ba	5373	MBEDTLS_SSL_ALERT_MSG_UNEXPECTED_MESSAGE );
marcozecchini	0:9fca2b23d0ba	5374	return( MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE );
marcozecchini	0:9fca2b23d0ba	5375	}
marcozecchini	0:9fca2b23d0ba	5376
marcozecchini	0:9fca2b23d0ba	5377	/* There is currently no ciphersuite using another length with TLS 1.2 */
marcozecchini	0:9fca2b23d0ba	5378	#if defined(MBEDTLS_SSL_PROTO_SSL3)
marcozecchini	0:9fca2b23d0ba	5379	if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 )
marcozecchini	0:9fca2b23d0ba	5380	hash_len = 36;
marcozecchini	0:9fca2b23d0ba	5381	else
marcozecchini	0:9fca2b23d0ba	5382	#endif
marcozecchini	0:9fca2b23d0ba	5383	hash_len = 12;
marcozecchini	0:9fca2b23d0ba	5384
marcozecchini	0:9fca2b23d0ba	5385	if( ssl->in_msg[0] != MBEDTLS_SSL_HS_FINISHED \|\|
marcozecchini	0:9fca2b23d0ba	5386	ssl->in_hslen != mbedtls_ssl_hs_hdr_len( ssl ) + hash_len )
marcozecchini	0:9fca2b23d0ba	5387	{
marcozecchini	0:9fca2b23d0ba	5388	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad finished message" ) );
marcozecchini	0:9fca2b23d0ba	5389	mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
marcozecchini	0:9fca2b23d0ba	5390	MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
marcozecchini	0:9fca2b23d0ba	5391	return( MBEDTLS_ERR_SSL_BAD_HS_FINISHED );
marcozecchini	0:9fca2b23d0ba	5392	}
marcozecchini	0:9fca2b23d0ba	5393
marcozecchini	0:9fca2b23d0ba	5394	if( mbedtls_ssl_safer_memcmp( ssl->in_msg + mbedtls_ssl_hs_hdr_len( ssl ),
marcozecchini	0:9fca2b23d0ba	5395	buf, hash_len ) != 0 )
marcozecchini	0:9fca2b23d0ba	5396	{
marcozecchini	0:9fca2b23d0ba	5397	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad finished message" ) );
marcozecchini	0:9fca2b23d0ba	5398	mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
marcozecchini	0:9fca2b23d0ba	5399	MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
marcozecchini	0:9fca2b23d0ba	5400	return( MBEDTLS_ERR_SSL_BAD_HS_FINISHED );
marcozecchini	0:9fca2b23d0ba	5401	}
marcozecchini	0:9fca2b23d0ba	5402
marcozecchini	0:9fca2b23d0ba	5403	#if defined(MBEDTLS_SSL_RENEGOTIATION)
marcozecchini	0:9fca2b23d0ba	5404	ssl->verify_data_len = hash_len;
marcozecchini	0:9fca2b23d0ba	5405	memcpy( ssl->peer_verify_data, buf, hash_len );
marcozecchini	0:9fca2b23d0ba	5406	#endif
marcozecchini	0:9fca2b23d0ba	5407
marcozecchini	0:9fca2b23d0ba	5408	if( ssl->handshake->resume != 0 )
marcozecchini	0:9fca2b23d0ba	5409	{
marcozecchini	0:9fca2b23d0ba	5410	#if defined(MBEDTLS_SSL_CLI_C)
marcozecchini	0:9fca2b23d0ba	5411	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_CLIENT )
marcozecchini	0:9fca2b23d0ba	5412	ssl->state = MBEDTLS_SSL_CLIENT_CHANGE_CIPHER_SPEC;
marcozecchini	0:9fca2b23d0ba	5413	#endif
marcozecchini	0:9fca2b23d0ba	5414	#if defined(MBEDTLS_SSL_SRV_C)
marcozecchini	0:9fca2b23d0ba	5415	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER )
marcozecchini	0:9fca2b23d0ba	5416	ssl->state = MBEDTLS_SSL_HANDSHAKE_WRAPUP;
marcozecchini	0:9fca2b23d0ba	5417	#endif
marcozecchini	0:9fca2b23d0ba	5418	}
marcozecchini	0:9fca2b23d0ba	5419	else
marcozecchini	0:9fca2b23d0ba	5420	ssl->state++;
marcozecchini	0:9fca2b23d0ba	5421
marcozecchini	0:9fca2b23d0ba	5422	#if defined(MBEDTLS_SSL_PROTO_DTLS)
marcozecchini	0:9fca2b23d0ba	5423	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
marcozecchini	0:9fca2b23d0ba	5424	mbedtls_ssl_recv_flight_completed( ssl );
marcozecchini	0:9fca2b23d0ba	5425	#endif
marcozecchini	0:9fca2b23d0ba	5426
marcozecchini	0:9fca2b23d0ba	5427	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= parse finished" ) );
marcozecchini	0:9fca2b23d0ba	5428
marcozecchini	0:9fca2b23d0ba	5429	return( 0 );
marcozecchini	0:9fca2b23d0ba	5430	}
marcozecchini	0:9fca2b23d0ba	5431
marcozecchini	0:9fca2b23d0ba	5432	static void ssl_handshake_params_init( mbedtls_ssl_handshake_params *handshake )
marcozecchini	0:9fca2b23d0ba	5433	{
marcozecchini	0:9fca2b23d0ba	5434	memset( handshake, 0, sizeof( mbedtls_ssl_handshake_params ) );
marcozecchini	0:9fca2b23d0ba	5435
marcozecchini	0:9fca2b23d0ba	5436	#if defined(MBEDTLS_SSL_PROTO_SSL3) \|\| defined(MBEDTLS_SSL_PROTO_TLS1) \|\| \
marcozecchini	0:9fca2b23d0ba	5437	defined(MBEDTLS_SSL_PROTO_TLS1_1)
marcozecchini	0:9fca2b23d0ba	5438	mbedtls_md5_init( &handshake->fin_md5 );
marcozecchini	0:9fca2b23d0ba	5439	mbedtls_sha1_init( &handshake->fin_sha1 );
marcozecchini	0:9fca2b23d0ba	5440	mbedtls_md5_starts( &handshake->fin_md5 );
marcozecchini	0:9fca2b23d0ba	5441	mbedtls_sha1_starts( &handshake->fin_sha1 );
marcozecchini	0:9fca2b23d0ba	5442	#endif
marcozecchini	0:9fca2b23d0ba	5443	#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
marcozecchini	0:9fca2b23d0ba	5444	#if defined(MBEDTLS_SHA256_C)
marcozecchini	0:9fca2b23d0ba	5445	mbedtls_sha256_init( &handshake->fin_sha256 );
marcozecchini	0:9fca2b23d0ba	5446	mbedtls_sha256_starts( &handshake->fin_sha256, 0 );
marcozecchini	0:9fca2b23d0ba	5447	#endif
marcozecchini	0:9fca2b23d0ba	5448	#if defined(MBEDTLS_SHA512_C)
marcozecchini	0:9fca2b23d0ba	5449	mbedtls_sha512_init( &handshake->fin_sha512 );
marcozecchini	0:9fca2b23d0ba	5450	mbedtls_sha512_starts( &handshake->fin_sha512, 1 );
marcozecchini	0:9fca2b23d0ba	5451	#endif
marcozecchini	0:9fca2b23d0ba	5452	#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
marcozecchini	0:9fca2b23d0ba	5453
marcozecchini	0:9fca2b23d0ba	5454	handshake->update_checksum = ssl_update_checksum_start;
marcozecchini	0:9fca2b23d0ba	5455
marcozecchini	0:9fca2b23d0ba	5456	#if defined(MBEDTLS_SSL_PROTO_TLS1_2) && \
marcozecchini	0:9fca2b23d0ba	5457	defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
marcozecchini	0:9fca2b23d0ba	5458	mbedtls_ssl_sig_hash_set_init( &handshake->hash_algs );
marcozecchini	0:9fca2b23d0ba	5459	#endif
marcozecchini	0:9fca2b23d0ba	5460
marcozecchini	0:9fca2b23d0ba	5461	#if defined(MBEDTLS_DHM_C)
marcozecchini	0:9fca2b23d0ba	5462	mbedtls_dhm_init( &handshake->dhm_ctx );
marcozecchini	0:9fca2b23d0ba	5463	#endif
marcozecchini	0:9fca2b23d0ba	5464	#if defined(MBEDTLS_ECDH_C)
marcozecchini	0:9fca2b23d0ba	5465	mbedtls_ecdh_init( &handshake->ecdh_ctx );
marcozecchini	0:9fca2b23d0ba	5466	#endif
marcozecchini	0:9fca2b23d0ba	5467	#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
marcozecchini	0:9fca2b23d0ba	5468	mbedtls_ecjpake_init( &handshake->ecjpake_ctx );
marcozecchini	0:9fca2b23d0ba	5469	#if defined(MBEDTLS_SSL_CLI_C)
marcozecchini	0:9fca2b23d0ba	5470	handshake->ecjpake_cache = NULL;
marcozecchini	0:9fca2b23d0ba	5471	handshake->ecjpake_cache_len = 0;
marcozecchini	0:9fca2b23d0ba	5472	#endif
marcozecchini	0:9fca2b23d0ba	5473	#endif
marcozecchini	0:9fca2b23d0ba	5474
marcozecchini	0:9fca2b23d0ba	5475	#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
marcozecchini	0:9fca2b23d0ba	5476	handshake->sni_authmode = MBEDTLS_SSL_VERIFY_UNSET;
marcozecchini	0:9fca2b23d0ba	5477	#endif
marcozecchini	0:9fca2b23d0ba	5478	}
marcozecchini	0:9fca2b23d0ba	5479
marcozecchini	0:9fca2b23d0ba	5480	static void ssl_transform_init( mbedtls_ssl_transform *transform )
marcozecchini	0:9fca2b23d0ba	5481	{
marcozecchini	0:9fca2b23d0ba	5482	memset( transform, 0, sizeof(mbedtls_ssl_transform) );
marcozecchini	0:9fca2b23d0ba	5483
marcozecchini	0:9fca2b23d0ba	5484	mbedtls_cipher_init( &transform->cipher_ctx_enc );
marcozecchini	0:9fca2b23d0ba	5485	mbedtls_cipher_init( &transform->cipher_ctx_dec );
marcozecchini	0:9fca2b23d0ba	5486
marcozecchini	0:9fca2b23d0ba	5487	mbedtls_md_init( &transform->md_ctx_enc );
marcozecchini	0:9fca2b23d0ba	5488	mbedtls_md_init( &transform->md_ctx_dec );
marcozecchini	0:9fca2b23d0ba	5489	}
marcozecchini	0:9fca2b23d0ba	5490
marcozecchini	0:9fca2b23d0ba	5491	void mbedtls_ssl_session_init( mbedtls_ssl_session *session )
marcozecchini	0:9fca2b23d0ba	5492	{
marcozecchini	0:9fca2b23d0ba	5493	memset( session, 0, sizeof(mbedtls_ssl_session) );
marcozecchini	0:9fca2b23d0ba	5494	}
marcozecchini	0:9fca2b23d0ba	5495
marcozecchini	0:9fca2b23d0ba	5496	static int ssl_handshake_init( mbedtls_ssl_context *ssl )
marcozecchini	0:9fca2b23d0ba	5497	{
marcozecchini	0:9fca2b23d0ba	5498	/* Clear old handshake information if present */
marcozecchini	0:9fca2b23d0ba	5499	if( ssl->transform_negotiate )
marcozecchini	0:9fca2b23d0ba	5500	mbedtls_ssl_transform_free( ssl->transform_negotiate );
marcozecchini	0:9fca2b23d0ba	5501	if( ssl->session_negotiate )
marcozecchini	0:9fca2b23d0ba	5502	mbedtls_ssl_session_free( ssl->session_negotiate );
marcozecchini	0:9fca2b23d0ba	5503	if( ssl->handshake )
marcozecchini	0:9fca2b23d0ba	5504	mbedtls_ssl_handshake_free( ssl->handshake );
marcozecchini	0:9fca2b23d0ba	5505
marcozecchini	0:9fca2b23d0ba	5506	/*
marcozecchini	0:9fca2b23d0ba	5507	* Either the pointers are now NULL or cleared properly and can be freed.
marcozecchini	0:9fca2b23d0ba	5508	* Now allocate missing structures.
marcozecchini	0:9fca2b23d0ba	5509	*/
marcozecchini	0:9fca2b23d0ba	5510	if( ssl->transform_negotiate == NULL )
marcozecchini	0:9fca2b23d0ba	5511	{
marcozecchini	0:9fca2b23d0ba	5512	ssl->transform_negotiate = mbedtls_calloc( 1, sizeof(mbedtls_ssl_transform) );
marcozecchini	0:9fca2b23d0ba	5513	}
marcozecchini	0:9fca2b23d0ba	5514
marcozecchini	0:9fca2b23d0ba	5515	if( ssl->session_negotiate == NULL )
marcozecchini	0:9fca2b23d0ba	5516	{
marcozecchini	0:9fca2b23d0ba	5517	ssl->session_negotiate = mbedtls_calloc( 1, sizeof(mbedtls_ssl_session) );
marcozecchini	0:9fca2b23d0ba	5518	}
marcozecchini	0:9fca2b23d0ba	5519
marcozecchini	0:9fca2b23d0ba	5520	if( ssl->handshake == NULL )
marcozecchini	0:9fca2b23d0ba	5521	{
marcozecchini	0:9fca2b23d0ba	5522	ssl->handshake = mbedtls_calloc( 1, sizeof(mbedtls_ssl_handshake_params) );
marcozecchini	0:9fca2b23d0ba	5523	}
marcozecchini	0:9fca2b23d0ba	5524
marcozecchini	0:9fca2b23d0ba	5525	/* All pointers should exist and can be directly freed without issue */
marcozecchini	0:9fca2b23d0ba	5526	if( ssl->handshake == NULL \|\|
marcozecchini	0:9fca2b23d0ba	5527	ssl->transform_negotiate == NULL \|\|
marcozecchini	0:9fca2b23d0ba	5528	ssl->session_negotiate == NULL )
marcozecchini	0:9fca2b23d0ba	5529	{
marcozecchini	0:9fca2b23d0ba	5530	MBEDTLS_SSL_DEBUG_MSG( 1, ( "alloc() of ssl sub-contexts failed" ) );
marcozecchini	0:9fca2b23d0ba	5531
marcozecchini	0:9fca2b23d0ba	5532	mbedtls_free( ssl->handshake );
marcozecchini	0:9fca2b23d0ba	5533	mbedtls_free( ssl->transform_negotiate );
marcozecchini	0:9fca2b23d0ba	5534	mbedtls_free( ssl->session_negotiate );
marcozecchini	0:9fca2b23d0ba	5535
marcozecchini	0:9fca2b23d0ba	5536	ssl->handshake = NULL;
marcozecchini	0:9fca2b23d0ba	5537	ssl->transform_negotiate = NULL;
marcozecchini	0:9fca2b23d0ba	5538	ssl->session_negotiate = NULL;
marcozecchini	0:9fca2b23d0ba	5539
marcozecchini	0:9fca2b23d0ba	5540	return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
marcozecchini	0:9fca2b23d0ba	5541	}
marcozecchini	0:9fca2b23d0ba	5542
marcozecchini	0:9fca2b23d0ba	5543	/* Initialize structures */
marcozecchini	0:9fca2b23d0ba	5544	mbedtls_ssl_session_init( ssl->session_negotiate );
marcozecchini	0:9fca2b23d0ba	5545	ssl_transform_init( ssl->transform_negotiate );
marcozecchini	0:9fca2b23d0ba	5546	ssl_handshake_params_init( ssl->handshake );
marcozecchini	0:9fca2b23d0ba	5547
marcozecchini	0:9fca2b23d0ba	5548	#if defined(MBEDTLS_SSL_PROTO_DTLS)
marcozecchini	0:9fca2b23d0ba	5549	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
marcozecchini	0:9fca2b23d0ba	5550	{
marcozecchini	0:9fca2b23d0ba	5551	ssl->handshake->alt_transform_out = ssl->transform_out;
marcozecchini	0:9fca2b23d0ba	5552
marcozecchini	0:9fca2b23d0ba	5553	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_CLIENT )
marcozecchini	0:9fca2b23d0ba	5554	ssl->handshake->retransmit_state = MBEDTLS_SSL_RETRANS_PREPARING;
marcozecchini	0:9fca2b23d0ba	5555	else
marcozecchini	0:9fca2b23d0ba	5556	ssl->handshake->retransmit_state = MBEDTLS_SSL_RETRANS_WAITING;
marcozecchini	0:9fca2b23d0ba	5557
marcozecchini	0:9fca2b23d0ba	5558	ssl_set_timer( ssl, 0 );
marcozecchini	0:9fca2b23d0ba	5559	}
marcozecchini	0:9fca2b23d0ba	5560	#endif
marcozecchini	0:9fca2b23d0ba	5561
marcozecchini	0:9fca2b23d0ba	5562	return( 0 );
marcozecchini	0:9fca2b23d0ba	5563	}
marcozecchini	0:9fca2b23d0ba	5564
marcozecchini	0:9fca2b23d0ba	5565	#if defined(MBEDTLS_SSL_DTLS_HELLO_VERIFY) && defined(MBEDTLS_SSL_SRV_C)
marcozecchini	0:9fca2b23d0ba	5566	/* Dummy cookie callbacks for defaults */
marcozecchini	0:9fca2b23d0ba	5567	static int ssl_cookie_write_dummy( void *ctx,
marcozecchini	0:9fca2b23d0ba	5568	unsigned char *p, unsigned char end,
marcozecchini	0:9fca2b23d0ba	5569	const unsigned char *cli_id, size_t cli_id_len )
marcozecchini	0:9fca2b23d0ba	5570	{
marcozecchini	0:9fca2b23d0ba	5571	((void) ctx);
marcozecchini	0:9fca2b23d0ba	5572	((void) p);
marcozecchini	0:9fca2b23d0ba	5573	((void) end);
marcozecchini	0:9fca2b23d0ba	5574	((void) cli_id);
marcozecchini	0:9fca2b23d0ba	5575	((void) cli_id_len);
marcozecchini	0:9fca2b23d0ba	5576
marcozecchini	0:9fca2b23d0ba	5577	return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE );
marcozecchini	0:9fca2b23d0ba	5578	}
marcozecchini	0:9fca2b23d0ba	5579
marcozecchini	0:9fca2b23d0ba	5580	static int ssl_cookie_check_dummy( void *ctx,
marcozecchini	0:9fca2b23d0ba	5581	const unsigned char *cookie, size_t cookie_len,
marcozecchini	0:9fca2b23d0ba	5582	const unsigned char *cli_id, size_t cli_id_len )
marcozecchini	0:9fca2b23d0ba	5583	{
marcozecchini	0:9fca2b23d0ba	5584	((void) ctx);
marcozecchini	0:9fca2b23d0ba	5585	((void) cookie);
marcozecchini	0:9fca2b23d0ba	5586	((void) cookie_len);
marcozecchini	0:9fca2b23d0ba	5587	((void) cli_id);
marcozecchini	0:9fca2b23d0ba	5588	((void) cli_id_len);
marcozecchini	0:9fca2b23d0ba	5589
marcozecchini	0:9fca2b23d0ba	5590	return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE );
marcozecchini	0:9fca2b23d0ba	5591	}
marcozecchini	0:9fca2b23d0ba	5592	#endif /* MBEDTLS_SSL_DTLS_HELLO_VERIFY && MBEDTLS_SSL_SRV_C */
marcozecchini	0:9fca2b23d0ba	5593
marcozecchini	0:9fca2b23d0ba	5594	/*
marcozecchini	0:9fca2b23d0ba	5595	* Initialize an SSL context
marcozecchini	0:9fca2b23d0ba	5596	*/
marcozecchini	0:9fca2b23d0ba	5597	void mbedtls_ssl_init( mbedtls_ssl_context *ssl )
marcozecchini	0:9fca2b23d0ba	5598	{
marcozecchini	0:9fca2b23d0ba	5599	memset( ssl, 0, sizeof( mbedtls_ssl_context ) );
marcozecchini	0:9fca2b23d0ba	5600	}
marcozecchini	0:9fca2b23d0ba	5601
marcozecchini	0:9fca2b23d0ba	5602	/*
marcozecchini	0:9fca2b23d0ba	5603	* Setup an SSL context
marcozecchini	0:9fca2b23d0ba	5604	*/
marcozecchini	0:9fca2b23d0ba	5605	int mbedtls_ssl_setup( mbedtls_ssl_context *ssl,
marcozecchini	0:9fca2b23d0ba	5606	const mbedtls_ssl_config *conf )
marcozecchini	0:9fca2b23d0ba	5607	{
marcozecchini	0:9fca2b23d0ba	5608	int ret;
marcozecchini	0:9fca2b23d0ba	5609	const size_t len = MBEDTLS_SSL_BUFFER_LEN;
marcozecchini	0:9fca2b23d0ba	5610
marcozecchini	0:9fca2b23d0ba	5611	ssl->conf = conf;
marcozecchini	0:9fca2b23d0ba	5612
marcozecchini	0:9fca2b23d0ba	5613	/*
marcozecchini	0:9fca2b23d0ba	5614	* Prepare base structures
marcozecchini	0:9fca2b23d0ba	5615	*/
marcozecchini	0:9fca2b23d0ba	5616	if( ( ssl-> in_buf = mbedtls_calloc( 1, len ) ) == NULL \|\|
marcozecchini	0:9fca2b23d0ba	5617	( ssl->out_buf = mbedtls_calloc( 1, len ) ) == NULL )
marcozecchini	0:9fca2b23d0ba	5618	{
marcozecchini	0:9fca2b23d0ba	5619	MBEDTLS_SSL_DEBUG_MSG( 1, ( "alloc(%d bytes) failed", len ) );
marcozecchini	0:9fca2b23d0ba	5620	mbedtls_free( ssl->in_buf );
marcozecchini	0:9fca2b23d0ba	5621	ssl->in_buf = NULL;
marcozecchini	0:9fca2b23d0ba	5622	return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
marcozecchini	0:9fca2b23d0ba	5623	}
marcozecchini	0:9fca2b23d0ba	5624
marcozecchini	0:9fca2b23d0ba	5625	#if defined(MBEDTLS_SSL_PROTO_DTLS)
marcozecchini	0:9fca2b23d0ba	5626	if( conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
marcozecchini	0:9fca2b23d0ba	5627	{
marcozecchini	0:9fca2b23d0ba	5628	ssl->out_hdr = ssl->out_buf;
marcozecchini	0:9fca2b23d0ba	5629	ssl->out_ctr = ssl->out_buf + 3;
marcozecchini	0:9fca2b23d0ba	5630	ssl->out_len = ssl->out_buf + 11;
marcozecchini	0:9fca2b23d0ba	5631	ssl->out_iv = ssl->out_buf + 13;
marcozecchini	0:9fca2b23d0ba	5632	ssl->out_msg = ssl->out_buf + 13;
marcozecchini	0:9fca2b23d0ba	5633
marcozecchini	0:9fca2b23d0ba	5634	ssl->in_hdr = ssl->in_buf;
marcozecchini	0:9fca2b23d0ba	5635	ssl->in_ctr = ssl->in_buf + 3;
marcozecchini	0:9fca2b23d0ba	5636	ssl->in_len = ssl->in_buf + 11;
marcozecchini	0:9fca2b23d0ba	5637	ssl->in_iv = ssl->in_buf + 13;
marcozecchini	0:9fca2b23d0ba	5638	ssl->in_msg = ssl->in_buf + 13;
marcozecchini	0:9fca2b23d0ba	5639	}
marcozecchini	0:9fca2b23d0ba	5640	else
marcozecchini	0:9fca2b23d0ba	5641	#endif
marcozecchini	0:9fca2b23d0ba	5642	{
marcozecchini	0:9fca2b23d0ba	5643	ssl->out_ctr = ssl->out_buf;
marcozecchini	0:9fca2b23d0ba	5644	ssl->out_hdr = ssl->out_buf + 8;
marcozecchini	0:9fca2b23d0ba	5645	ssl->out_len = ssl->out_buf + 11;
marcozecchini	0:9fca2b23d0ba	5646	ssl->out_iv = ssl->out_buf + 13;
marcozecchini	0:9fca2b23d0ba	5647	ssl->out_msg = ssl->out_buf + 13;
marcozecchini	0:9fca2b23d0ba	5648
marcozecchini	0:9fca2b23d0ba	5649	ssl->in_ctr = ssl->in_buf;
marcozecchini	0:9fca2b23d0ba	5650	ssl->in_hdr = ssl->in_buf + 8;
marcozecchini	0:9fca2b23d0ba	5651	ssl->in_len = ssl->in_buf + 11;
marcozecchini	0:9fca2b23d0ba	5652	ssl->in_iv = ssl->in_buf + 13;
marcozecchini	0:9fca2b23d0ba	5653	ssl->in_msg = ssl->in_buf + 13;
marcozecchini	0:9fca2b23d0ba	5654	}
marcozecchini	0:9fca2b23d0ba	5655
marcozecchini	0:9fca2b23d0ba	5656	if( ( ret = ssl_handshake_init( ssl ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	5657	return( ret );
marcozecchini	0:9fca2b23d0ba	5658
marcozecchini	0:9fca2b23d0ba	5659	return( 0 );
marcozecchini	0:9fca2b23d0ba	5660	}
marcozecchini	0:9fca2b23d0ba	5661
marcozecchini	0:9fca2b23d0ba	5662	/*
marcozecchini	0:9fca2b23d0ba	5663	* Reset an initialized and used SSL context for re-use while retaining
marcozecchini	0:9fca2b23d0ba	5664	* all application-set variables, function pointers and data.
marcozecchini	0:9fca2b23d0ba	5665	*
marcozecchini	0:9fca2b23d0ba	5666	* If partial is non-zero, keep data in the input buffer and client ID.
marcozecchini	0:9fca2b23d0ba	5667	* (Use when a DTLS client reconnects from the same port.)
marcozecchini	0:9fca2b23d0ba	5668	*/
marcozecchini	0:9fca2b23d0ba	5669	static int ssl_session_reset_int( mbedtls_ssl_context *ssl, int partial )
marcozecchini	0:9fca2b23d0ba	5670	{
marcozecchini	0:9fca2b23d0ba	5671	int ret;
marcozecchini	0:9fca2b23d0ba	5672
marcozecchini	0:9fca2b23d0ba	5673	ssl->state = MBEDTLS_SSL_HELLO_REQUEST;
marcozecchini	0:9fca2b23d0ba	5674
marcozecchini	0:9fca2b23d0ba	5675	/* Cancel any possibly running timer */
marcozecchini	0:9fca2b23d0ba	5676	ssl_set_timer( ssl, 0 );
marcozecchini	0:9fca2b23d0ba	5677
marcozecchini	0:9fca2b23d0ba	5678	#if defined(MBEDTLS_SSL_RENEGOTIATION)
marcozecchini	0:9fca2b23d0ba	5679	ssl->renego_status = MBEDTLS_SSL_INITIAL_HANDSHAKE;
marcozecchini	0:9fca2b23d0ba	5680	ssl->renego_records_seen = 0;
marcozecchini	0:9fca2b23d0ba	5681
marcozecchini	0:9fca2b23d0ba	5682	ssl->verify_data_len = 0;
marcozecchini	0:9fca2b23d0ba	5683	memset( ssl->own_verify_data, 0, MBEDTLS_SSL_VERIFY_DATA_MAX_LEN );
marcozecchini	0:9fca2b23d0ba	5684	memset( ssl->peer_verify_data, 0, MBEDTLS_SSL_VERIFY_DATA_MAX_LEN );
marcozecchini	0:9fca2b23d0ba	5685	#endif
marcozecchini	0:9fca2b23d0ba	5686	ssl->secure_renegotiation = MBEDTLS_SSL_LEGACY_RENEGOTIATION;
marcozecchini	0:9fca2b23d0ba	5687
marcozecchini	0:9fca2b23d0ba	5688	ssl->in_offt = NULL;
marcozecchini	0:9fca2b23d0ba	5689
marcozecchini	0:9fca2b23d0ba	5690	ssl->in_msg = ssl->in_buf + 13;
marcozecchini	0:9fca2b23d0ba	5691	ssl->in_msgtype = 0;
marcozecchini	0:9fca2b23d0ba	5692	ssl->in_msglen = 0;
marcozecchini	0:9fca2b23d0ba	5693	if( partial == 0 )
marcozecchini	0:9fca2b23d0ba	5694	ssl->in_left = 0;
marcozecchini	0:9fca2b23d0ba	5695	#if defined(MBEDTLS_SSL_PROTO_DTLS)
marcozecchini	0:9fca2b23d0ba	5696	ssl->next_record_offset = 0;
marcozecchini	0:9fca2b23d0ba	5697	ssl->in_epoch = 0;
marcozecchini	0:9fca2b23d0ba	5698	#endif
marcozecchini	0:9fca2b23d0ba	5699	#if defined(MBEDTLS_SSL_DTLS_ANTI_REPLAY)
marcozecchini	0:9fca2b23d0ba	5700	ssl_dtls_replay_reset( ssl );
marcozecchini	0:9fca2b23d0ba	5701	#endif
marcozecchini	0:9fca2b23d0ba	5702
marcozecchini	0:9fca2b23d0ba	5703	ssl->in_hslen = 0;
marcozecchini	0:9fca2b23d0ba	5704	ssl->nb_zero = 0;
marcozecchini	0:9fca2b23d0ba	5705
marcozecchini	0:9fca2b23d0ba	5706	ssl->keep_current_message = 0;
marcozecchini	0:9fca2b23d0ba	5707
marcozecchini	0:9fca2b23d0ba	5708	ssl->out_msg = ssl->out_buf + 13;
marcozecchini	0:9fca2b23d0ba	5709	ssl->out_msgtype = 0;
marcozecchini	0:9fca2b23d0ba	5710	ssl->out_msglen = 0;
marcozecchini	0:9fca2b23d0ba	5711	ssl->out_left = 0;
marcozecchini	0:9fca2b23d0ba	5712	#if defined(MBEDTLS_SSL_CBC_RECORD_SPLITTING)
marcozecchini	0:9fca2b23d0ba	5713	if( ssl->split_done != MBEDTLS_SSL_CBC_RECORD_SPLITTING_DISABLED )
marcozecchini	0:9fca2b23d0ba	5714	ssl->split_done = 0;
marcozecchini	0:9fca2b23d0ba	5715	#endif
marcozecchini	0:9fca2b23d0ba	5716
marcozecchini	0:9fca2b23d0ba	5717	ssl->transform_in = NULL;
marcozecchini	0:9fca2b23d0ba	5718	ssl->transform_out = NULL;
marcozecchini	0:9fca2b23d0ba	5719
marcozecchini	0:9fca2b23d0ba	5720	memset( ssl->out_buf, 0, MBEDTLS_SSL_BUFFER_LEN );
marcozecchini	0:9fca2b23d0ba	5721	if( partial == 0 )
marcozecchini	0:9fca2b23d0ba	5722	memset( ssl->in_buf, 0, MBEDTLS_SSL_BUFFER_LEN );
marcozecchini	0:9fca2b23d0ba	5723
marcozecchini	0:9fca2b23d0ba	5724	#if defined(MBEDTLS_SSL_HW_RECORD_ACCEL)
marcozecchini	0:9fca2b23d0ba	5725	if( mbedtls_ssl_hw_record_reset != NULL )
marcozecchini	0:9fca2b23d0ba	5726	{
marcozecchini	0:9fca2b23d0ba	5727	MBEDTLS_SSL_DEBUG_MSG( 2, ( "going for mbedtls_ssl_hw_record_reset()" ) );
marcozecchini	0:9fca2b23d0ba	5728	if( ( ret = mbedtls_ssl_hw_record_reset( ssl ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	5729	{
marcozecchini	0:9fca2b23d0ba	5730	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_hw_record_reset", ret );
marcozecchini	0:9fca2b23d0ba	5731	return( MBEDTLS_ERR_SSL_HW_ACCEL_FAILED );
marcozecchini	0:9fca2b23d0ba	5732	}
marcozecchini	0:9fca2b23d0ba	5733	}
marcozecchini	0:9fca2b23d0ba	5734	#endif
marcozecchini	0:9fca2b23d0ba	5735
marcozecchini	0:9fca2b23d0ba	5736	if( ssl->transform )
marcozecchini	0:9fca2b23d0ba	5737	{
marcozecchini	0:9fca2b23d0ba	5738	mbedtls_ssl_transform_free( ssl->transform );
marcozecchini	0:9fca2b23d0ba	5739	mbedtls_free( ssl->transform );
marcozecchini	0:9fca2b23d0ba	5740	ssl->transform = NULL;
marcozecchini	0:9fca2b23d0ba	5741	}
marcozecchini	0:9fca2b23d0ba	5742
marcozecchini	0:9fca2b23d0ba	5743	if( ssl->session )
marcozecchini	0:9fca2b23d0ba	5744	{
marcozecchini	0:9fca2b23d0ba	5745	mbedtls_ssl_session_free( ssl->session );
marcozecchini	0:9fca2b23d0ba	5746	mbedtls_free( ssl->session );
marcozecchini	0:9fca2b23d0ba	5747	ssl->session = NULL;
marcozecchini	0:9fca2b23d0ba	5748	}
marcozecchini	0:9fca2b23d0ba	5749
marcozecchini	0:9fca2b23d0ba	5750	#if defined(MBEDTLS_SSL_ALPN)
marcozecchini	0:9fca2b23d0ba	5751	ssl->alpn_chosen = NULL;
marcozecchini	0:9fca2b23d0ba	5752	#endif
marcozecchini	0:9fca2b23d0ba	5753
marcozecchini	0:9fca2b23d0ba	5754	#if defined(MBEDTLS_SSL_DTLS_HELLO_VERIFY) && defined(MBEDTLS_SSL_SRV_C)
marcozecchini	0:9fca2b23d0ba	5755	if( partial == 0 )
marcozecchini	0:9fca2b23d0ba	5756	{
marcozecchini	0:9fca2b23d0ba	5757	mbedtls_free( ssl->cli_id );
marcozecchini	0:9fca2b23d0ba	5758	ssl->cli_id = NULL;
marcozecchini	0:9fca2b23d0ba	5759	ssl->cli_id_len = 0;
marcozecchini	0:9fca2b23d0ba	5760	}
marcozecchini	0:9fca2b23d0ba	5761	#endif
marcozecchini	0:9fca2b23d0ba	5762
marcozecchini	0:9fca2b23d0ba	5763	if( ( ret = ssl_handshake_init( ssl ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	5764	return( ret );
marcozecchini	0:9fca2b23d0ba	5765
marcozecchini	0:9fca2b23d0ba	5766	return( 0 );
marcozecchini	0:9fca2b23d0ba	5767	}
marcozecchini	0:9fca2b23d0ba	5768
marcozecchini	0:9fca2b23d0ba	5769	/*
marcozecchini	0:9fca2b23d0ba	5770	* Reset an initialized and used SSL context for re-use while retaining
marcozecchini	0:9fca2b23d0ba	5771	* all application-set variables, function pointers and data.
marcozecchini	0:9fca2b23d0ba	5772	*/
marcozecchini	0:9fca2b23d0ba	5773	int mbedtls_ssl_session_reset( mbedtls_ssl_context *ssl )
marcozecchini	0:9fca2b23d0ba	5774	{
marcozecchini	0:9fca2b23d0ba	5775	return( ssl_session_reset_int( ssl, 0 ) );
marcozecchini	0:9fca2b23d0ba	5776	}
marcozecchini	0:9fca2b23d0ba	5777
marcozecchini	0:9fca2b23d0ba	5778	/*
marcozecchini	0:9fca2b23d0ba	5779	* SSL set accessors
marcozecchini	0:9fca2b23d0ba	5780	*/
marcozecchini	0:9fca2b23d0ba	5781	void mbedtls_ssl_conf_endpoint( mbedtls_ssl_config *conf, int endpoint )
marcozecchini	0:9fca2b23d0ba	5782	{
marcozecchini	0:9fca2b23d0ba	5783	conf->endpoint = endpoint;
marcozecchini	0:9fca2b23d0ba	5784	}
marcozecchini	0:9fca2b23d0ba	5785
marcozecchini	0:9fca2b23d0ba	5786	void mbedtls_ssl_conf_transport( mbedtls_ssl_config *conf, int transport )
marcozecchini	0:9fca2b23d0ba	5787	{
marcozecchini	0:9fca2b23d0ba	5788	conf->transport = transport;
marcozecchini	0:9fca2b23d0ba	5789	}
marcozecchini	0:9fca2b23d0ba	5790
marcozecchini	0:9fca2b23d0ba	5791	#if defined(MBEDTLS_SSL_DTLS_ANTI_REPLAY)
marcozecchini	0:9fca2b23d0ba	5792	void mbedtls_ssl_conf_dtls_anti_replay( mbedtls_ssl_config *conf, char mode )
marcozecchini	0:9fca2b23d0ba	5793	{
marcozecchini	0:9fca2b23d0ba	5794	conf->anti_replay = mode;
marcozecchini	0:9fca2b23d0ba	5795	}
marcozecchini	0:9fca2b23d0ba	5796	#endif
marcozecchini	0:9fca2b23d0ba	5797
marcozecchini	0:9fca2b23d0ba	5798	#if defined(MBEDTLS_SSL_DTLS_BADMAC_LIMIT)
marcozecchini	0:9fca2b23d0ba	5799	void mbedtls_ssl_conf_dtls_badmac_limit( mbedtls_ssl_config *conf, unsigned limit )
marcozecchini	0:9fca2b23d0ba	5800	{
marcozecchini	0:9fca2b23d0ba	5801	conf->badmac_limit = limit;
marcozecchini	0:9fca2b23d0ba	5802	}
marcozecchini	0:9fca2b23d0ba	5803	#endif
marcozecchini	0:9fca2b23d0ba	5804
marcozecchini	0:9fca2b23d0ba	5805	#if defined(MBEDTLS_SSL_PROTO_DTLS)
marcozecchini	0:9fca2b23d0ba	5806	void mbedtls_ssl_conf_handshake_timeout( mbedtls_ssl_config *conf, uint32_t min, uint32_t max )
marcozecchini	0:9fca2b23d0ba	5807	{
marcozecchini	0:9fca2b23d0ba	5808	conf->hs_timeout_min = min;
marcozecchini	0:9fca2b23d0ba	5809	conf->hs_timeout_max = max;
marcozecchini	0:9fca2b23d0ba	5810	}
marcozecchini	0:9fca2b23d0ba	5811	#endif
marcozecchini	0:9fca2b23d0ba	5812
marcozecchini	0:9fca2b23d0ba	5813	void mbedtls_ssl_conf_authmode( mbedtls_ssl_config *conf, int authmode )
marcozecchini	0:9fca2b23d0ba	5814	{
marcozecchini	0:9fca2b23d0ba	5815	conf->authmode = authmode;
marcozecchini	0:9fca2b23d0ba	5816	}
marcozecchini	0:9fca2b23d0ba	5817
marcozecchini	0:9fca2b23d0ba	5818	#if defined(MBEDTLS_X509_CRT_PARSE_C)
marcozecchini	0:9fca2b23d0ba	5819	void mbedtls_ssl_conf_verify( mbedtls_ssl_config *conf,
marcozecchini	0:9fca2b23d0ba	5820	int (f_vrfy)(void , mbedtls_x509_crt , int, uint32_t ),
marcozecchini	0:9fca2b23d0ba	5821	void *p_vrfy )
marcozecchini	0:9fca2b23d0ba	5822	{
marcozecchini	0:9fca2b23d0ba	5823	conf->f_vrfy = f_vrfy;
marcozecchini	0:9fca2b23d0ba	5824	conf->p_vrfy = p_vrfy;
marcozecchini	0:9fca2b23d0ba	5825	}
marcozecchini	0:9fca2b23d0ba	5826	#endif /* MBEDTLS_X509_CRT_PARSE_C */
marcozecchini	0:9fca2b23d0ba	5827
marcozecchini	0:9fca2b23d0ba	5828	void mbedtls_ssl_conf_rng( mbedtls_ssl_config *conf,
marcozecchini	0:9fca2b23d0ba	5829	int (f_rng)(void , unsigned char *, size_t),
marcozecchini	0:9fca2b23d0ba	5830	void *p_rng )
marcozecchini	0:9fca2b23d0ba	5831	{
marcozecchini	0:9fca2b23d0ba	5832	conf->f_rng = f_rng;
marcozecchini	0:9fca2b23d0ba	5833	conf->p_rng = p_rng;
marcozecchini	0:9fca2b23d0ba	5834	}
marcozecchini	0:9fca2b23d0ba	5835
marcozecchini	0:9fca2b23d0ba	5836	void mbedtls_ssl_conf_dbg( mbedtls_ssl_config *conf,
marcozecchini	0:9fca2b23d0ba	5837	void (f_dbg)(void , int, const char , int, const char ),
marcozecchini	0:9fca2b23d0ba	5838	void *p_dbg )
marcozecchini	0:9fca2b23d0ba	5839	{
marcozecchini	0:9fca2b23d0ba	5840	conf->f_dbg = f_dbg;
marcozecchini	0:9fca2b23d0ba	5841	conf->p_dbg = p_dbg;
marcozecchini	0:9fca2b23d0ba	5842	}
marcozecchini	0:9fca2b23d0ba	5843
marcozecchini	0:9fca2b23d0ba	5844	void mbedtls_ssl_set_bio( mbedtls_ssl_context *ssl,
marcozecchini	0:9fca2b23d0ba	5845	void *p_bio,
marcozecchini	0:9fca2b23d0ba	5846	mbedtls_ssl_send_t *f_send,
marcozecchini	0:9fca2b23d0ba	5847	mbedtls_ssl_recv_t *f_recv,
marcozecchini	0:9fca2b23d0ba	5848	mbedtls_ssl_recv_timeout_t *f_recv_timeout )
marcozecchini	0:9fca2b23d0ba	5849	{
marcozecchini	0:9fca2b23d0ba	5850	ssl->p_bio = p_bio;
marcozecchini	0:9fca2b23d0ba	5851	ssl->f_send = f_send;
marcozecchini	0:9fca2b23d0ba	5852	ssl->f_recv = f_recv;
marcozecchini	0:9fca2b23d0ba	5853	ssl->f_recv_timeout = f_recv_timeout;
marcozecchini	0:9fca2b23d0ba	5854	}
marcozecchini	0:9fca2b23d0ba	5855
marcozecchini	0:9fca2b23d0ba	5856	void mbedtls_ssl_conf_read_timeout( mbedtls_ssl_config *conf, uint32_t timeout )
marcozecchini	0:9fca2b23d0ba	5857	{
marcozecchini	0:9fca2b23d0ba	5858	conf->read_timeout = timeout;
marcozecchini	0:9fca2b23d0ba	5859	}
marcozecchini	0:9fca2b23d0ba	5860
marcozecchini	0:9fca2b23d0ba	5861	void mbedtls_ssl_set_timer_cb( mbedtls_ssl_context *ssl,
marcozecchini	0:9fca2b23d0ba	5862	void *p_timer,
marcozecchini	0:9fca2b23d0ba	5863	mbedtls_ssl_set_timer_t *f_set_timer,
marcozecchini	0:9fca2b23d0ba	5864	mbedtls_ssl_get_timer_t *f_get_timer )
marcozecchini	0:9fca2b23d0ba	5865	{
marcozecchini	0:9fca2b23d0ba	5866	ssl->p_timer = p_timer;
marcozecchini	0:9fca2b23d0ba	5867	ssl->f_set_timer = f_set_timer;
marcozecchini	0:9fca2b23d0ba	5868	ssl->f_get_timer = f_get_timer;
marcozecchini	0:9fca2b23d0ba	5869
marcozecchini	0:9fca2b23d0ba	5870	/* Make sure we start with no timer running */
marcozecchini	0:9fca2b23d0ba	5871	ssl_set_timer( ssl, 0 );
marcozecchini	0:9fca2b23d0ba	5872	}
marcozecchini	0:9fca2b23d0ba	5873
marcozecchini	0:9fca2b23d0ba	5874	#if defined(MBEDTLS_SSL_SRV_C)
marcozecchini	0:9fca2b23d0ba	5875	void mbedtls_ssl_conf_session_cache( mbedtls_ssl_config *conf,
marcozecchini	0:9fca2b23d0ba	5876	void *p_cache,
marcozecchini	0:9fca2b23d0ba	5877	int (f_get_cache)(void , mbedtls_ssl_session *),
marcozecchini	0:9fca2b23d0ba	5878	int (f_set_cache)(void , const mbedtls_ssl_session *) )
marcozecchini	0:9fca2b23d0ba	5879	{
marcozecchini	0:9fca2b23d0ba	5880	conf->p_cache = p_cache;
marcozecchini	0:9fca2b23d0ba	5881	conf->f_get_cache = f_get_cache;
marcozecchini	0:9fca2b23d0ba	5882	conf->f_set_cache = f_set_cache;
marcozecchini	0:9fca2b23d0ba	5883	}
marcozecchini	0:9fca2b23d0ba	5884	#endif /* MBEDTLS_SSL_SRV_C */
marcozecchini	0:9fca2b23d0ba	5885
marcozecchini	0:9fca2b23d0ba	5886	#if defined(MBEDTLS_SSL_CLI_C)
marcozecchini	0:9fca2b23d0ba	5887	int mbedtls_ssl_set_session( mbedtls_ssl_context ssl, const mbedtls_ssl_session session )
marcozecchini	0:9fca2b23d0ba	5888	{
marcozecchini	0:9fca2b23d0ba	5889	int ret;
marcozecchini	0:9fca2b23d0ba	5890
marcozecchini	0:9fca2b23d0ba	5891	if( ssl == NULL \|\|
marcozecchini	0:9fca2b23d0ba	5892	session == NULL \|\|
marcozecchini	0:9fca2b23d0ba	5893	ssl->session_negotiate == NULL \|\|
marcozecchini	0:9fca2b23d0ba	5894	ssl->conf->endpoint != MBEDTLS_SSL_IS_CLIENT )
marcozecchini	0:9fca2b23d0ba	5895	{
marcozecchini	0:9fca2b23d0ba	5896	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
marcozecchini	0:9fca2b23d0ba	5897	}
marcozecchini	0:9fca2b23d0ba	5898
marcozecchini	0:9fca2b23d0ba	5899	if( ( ret = ssl_session_copy( ssl->session_negotiate, session ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	5900	return( ret );
marcozecchini	0:9fca2b23d0ba	5901
marcozecchini	0:9fca2b23d0ba	5902	ssl->handshake->resume = 1;
marcozecchini	0:9fca2b23d0ba	5903
marcozecchini	0:9fca2b23d0ba	5904	return( 0 );
marcozecchini	0:9fca2b23d0ba	5905	}
marcozecchini	0:9fca2b23d0ba	5906	#endif /* MBEDTLS_SSL_CLI_C */
marcozecchini	0:9fca2b23d0ba	5907
marcozecchini	0:9fca2b23d0ba	5908	void mbedtls_ssl_conf_ciphersuites( mbedtls_ssl_config *conf,
marcozecchini	0:9fca2b23d0ba	5909	const int *ciphersuites )
marcozecchini	0:9fca2b23d0ba	5910	{
marcozecchini	0:9fca2b23d0ba	5911	conf->ciphersuite_list[MBEDTLS_SSL_MINOR_VERSION_0] = ciphersuites;
marcozecchini	0:9fca2b23d0ba	5912	conf->ciphersuite_list[MBEDTLS_SSL_MINOR_VERSION_1] = ciphersuites;
marcozecchini	0:9fca2b23d0ba	5913	conf->ciphersuite_list[MBEDTLS_SSL_MINOR_VERSION_2] = ciphersuites;
marcozecchini	0:9fca2b23d0ba	5914	conf->ciphersuite_list[MBEDTLS_SSL_MINOR_VERSION_3] = ciphersuites;
marcozecchini	0:9fca2b23d0ba	5915	}
marcozecchini	0:9fca2b23d0ba	5916
marcozecchini	0:9fca2b23d0ba	5917	void mbedtls_ssl_conf_ciphersuites_for_version( mbedtls_ssl_config *conf,
marcozecchini	0:9fca2b23d0ba	5918	const int *ciphersuites,
marcozecchini	0:9fca2b23d0ba	5919	int major, int minor )
marcozecchini	0:9fca2b23d0ba	5920	{
marcozecchini	0:9fca2b23d0ba	5921	if( major != MBEDTLS_SSL_MAJOR_VERSION_3 )
marcozecchini	0:9fca2b23d0ba	5922	return;
marcozecchini	0:9fca2b23d0ba	5923
marcozecchini	0:9fca2b23d0ba	5924	if( minor < MBEDTLS_SSL_MINOR_VERSION_0 \|\| minor > MBEDTLS_SSL_MINOR_VERSION_3 )
marcozecchini	0:9fca2b23d0ba	5925	return;
marcozecchini	0:9fca2b23d0ba	5926
marcozecchini	0:9fca2b23d0ba	5927	conf->ciphersuite_list[minor] = ciphersuites;
marcozecchini	0:9fca2b23d0ba	5928	}
marcozecchini	0:9fca2b23d0ba	5929
marcozecchini	0:9fca2b23d0ba	5930	#if defined(MBEDTLS_X509_CRT_PARSE_C)
marcozecchini	0:9fca2b23d0ba	5931	void mbedtls_ssl_conf_cert_profile( mbedtls_ssl_config *conf,
marcozecchini	0:9fca2b23d0ba	5932	const mbedtls_x509_crt_profile *profile )
marcozecchini	0:9fca2b23d0ba	5933	{
marcozecchini	0:9fca2b23d0ba	5934	conf->cert_profile = profile;
marcozecchini	0:9fca2b23d0ba	5935	}
marcozecchini	0:9fca2b23d0ba	5936
marcozecchini	0:9fca2b23d0ba	5937	/* Append a new keycert entry to a (possibly empty) list */
marcozecchini	0:9fca2b23d0ba	5938	static int ssl_append_key_cert( mbedtls_ssl_key_cert **head,
marcozecchini	0:9fca2b23d0ba	5939	mbedtls_x509_crt *cert,
marcozecchini	0:9fca2b23d0ba	5940	mbedtls_pk_context *key )
marcozecchini	0:9fca2b23d0ba	5941	{
marcozecchini	0:9fca2b23d0ba	5942	mbedtls_ssl_key_cert *new;
marcozecchini	0:9fca2b23d0ba	5943
marcozecchini	0:9fca2b23d0ba	5944	new = mbedtls_calloc( 1, sizeof( mbedtls_ssl_key_cert ) );
marcozecchini	0:9fca2b23d0ba	5945	if( new == NULL )
marcozecchini	0:9fca2b23d0ba	5946	return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
marcozecchini	0:9fca2b23d0ba	5947
marcozecchini	0:9fca2b23d0ba	5948	new->cert = cert;
marcozecchini	0:9fca2b23d0ba	5949	new->key = key;
marcozecchini	0:9fca2b23d0ba	5950	new->next = NULL;
marcozecchini	0:9fca2b23d0ba	5951
marcozecchini	0:9fca2b23d0ba	5952	/* Update head is the list was null, else add to the end */
marcozecchini	0:9fca2b23d0ba	5953	if( *head == NULL )
marcozecchini	0:9fca2b23d0ba	5954	{
marcozecchini	0:9fca2b23d0ba	5955	*head = new;
marcozecchini	0:9fca2b23d0ba	5956	}
marcozecchini	0:9fca2b23d0ba	5957	else
marcozecchini	0:9fca2b23d0ba	5958	{
marcozecchini	0:9fca2b23d0ba	5959	mbedtls_ssl_key_cert cur = head;
marcozecchini	0:9fca2b23d0ba	5960	while( cur->next != NULL )
marcozecchini	0:9fca2b23d0ba	5961	cur = cur->next;
marcozecchini	0:9fca2b23d0ba	5962	cur->next = new;
marcozecchini	0:9fca2b23d0ba	5963	}
marcozecchini	0:9fca2b23d0ba	5964
marcozecchini	0:9fca2b23d0ba	5965	return( 0 );
marcozecchini	0:9fca2b23d0ba	5966	}
marcozecchini	0:9fca2b23d0ba	5967
marcozecchini	0:9fca2b23d0ba	5968	int mbedtls_ssl_conf_own_cert( mbedtls_ssl_config *conf,
marcozecchini	0:9fca2b23d0ba	5969	mbedtls_x509_crt *own_cert,
marcozecchini	0:9fca2b23d0ba	5970	mbedtls_pk_context *pk_key )
marcozecchini	0:9fca2b23d0ba	5971	{
marcozecchini	0:9fca2b23d0ba	5972	return( ssl_append_key_cert( &conf->key_cert, own_cert, pk_key ) );
marcozecchini	0:9fca2b23d0ba	5973	}
marcozecchini	0:9fca2b23d0ba	5974
marcozecchini	0:9fca2b23d0ba	5975	void mbedtls_ssl_conf_ca_chain( mbedtls_ssl_config *conf,
marcozecchini	0:9fca2b23d0ba	5976	mbedtls_x509_crt *ca_chain,
marcozecchini	0:9fca2b23d0ba	5977	mbedtls_x509_crl *ca_crl )
marcozecchini	0:9fca2b23d0ba	5978	{
marcozecchini	0:9fca2b23d0ba	5979	conf->ca_chain = ca_chain;
marcozecchini	0:9fca2b23d0ba	5980	conf->ca_crl = ca_crl;
marcozecchini	0:9fca2b23d0ba	5981	}
marcozecchini	0:9fca2b23d0ba	5982	#endif /* MBEDTLS_X509_CRT_PARSE_C */
marcozecchini	0:9fca2b23d0ba	5983
marcozecchini	0:9fca2b23d0ba	5984	#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
marcozecchini	0:9fca2b23d0ba	5985	int mbedtls_ssl_set_hs_own_cert( mbedtls_ssl_context *ssl,
marcozecchini	0:9fca2b23d0ba	5986	mbedtls_x509_crt *own_cert,
marcozecchini	0:9fca2b23d0ba	5987	mbedtls_pk_context *pk_key )
marcozecchini	0:9fca2b23d0ba	5988	{
marcozecchini	0:9fca2b23d0ba	5989	return( ssl_append_key_cert( &ssl->handshake->sni_key_cert,
marcozecchini	0:9fca2b23d0ba	5990	own_cert, pk_key ) );
marcozecchini	0:9fca2b23d0ba	5991	}
marcozecchini	0:9fca2b23d0ba	5992
marcozecchini	0:9fca2b23d0ba	5993	void mbedtls_ssl_set_hs_ca_chain( mbedtls_ssl_context *ssl,
marcozecchini	0:9fca2b23d0ba	5994	mbedtls_x509_crt *ca_chain,
marcozecchini	0:9fca2b23d0ba	5995	mbedtls_x509_crl *ca_crl )
marcozecchini	0:9fca2b23d0ba	5996	{
marcozecchini	0:9fca2b23d0ba	5997	ssl->handshake->sni_ca_chain = ca_chain;
marcozecchini	0:9fca2b23d0ba	5998	ssl->handshake->sni_ca_crl = ca_crl;
marcozecchini	0:9fca2b23d0ba	5999	}
marcozecchini	0:9fca2b23d0ba	6000
marcozecchini	0:9fca2b23d0ba	6001	void mbedtls_ssl_set_hs_authmode( mbedtls_ssl_context *ssl,
marcozecchini	0:9fca2b23d0ba	6002	int authmode )
marcozecchini	0:9fca2b23d0ba	6003	{
marcozecchini	0:9fca2b23d0ba	6004	ssl->handshake->sni_authmode = authmode;
marcozecchini	0:9fca2b23d0ba	6005	}
marcozecchini	0:9fca2b23d0ba	6006	#endif /* MBEDTLS_SSL_SERVER_NAME_INDICATION */
marcozecchini	0:9fca2b23d0ba	6007
marcozecchini	0:9fca2b23d0ba	6008	#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
marcozecchini	0:9fca2b23d0ba	6009	/*
marcozecchini	0:9fca2b23d0ba	6010	* Set EC J-PAKE password for current handshake
marcozecchini	0:9fca2b23d0ba	6011	*/
marcozecchini	0:9fca2b23d0ba	6012	int mbedtls_ssl_set_hs_ecjpake_password( mbedtls_ssl_context *ssl,
marcozecchini	0:9fca2b23d0ba	6013	const unsigned char *pw,
marcozecchini	0:9fca2b23d0ba	6014	size_t pw_len )
marcozecchini	0:9fca2b23d0ba	6015	{
marcozecchini	0:9fca2b23d0ba	6016	mbedtls_ecjpake_role role;
marcozecchini	0:9fca2b23d0ba	6017
marcozecchini	0:9fca2b23d0ba	6018	if( ssl->handshake == NULL \|\| ssl->conf == NULL )
marcozecchini	0:9fca2b23d0ba	6019	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
marcozecchini	0:9fca2b23d0ba	6020
marcozecchini	0:9fca2b23d0ba	6021	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER )
marcozecchini	0:9fca2b23d0ba	6022	role = MBEDTLS_ECJPAKE_SERVER;
marcozecchini	0:9fca2b23d0ba	6023	else
marcozecchini	0:9fca2b23d0ba	6024	role = MBEDTLS_ECJPAKE_CLIENT;
marcozecchini	0:9fca2b23d0ba	6025
marcozecchini	0:9fca2b23d0ba	6026	return( mbedtls_ecjpake_setup( &ssl->handshake->ecjpake_ctx,
marcozecchini	0:9fca2b23d0ba	6027	role,
marcozecchini	0:9fca2b23d0ba	6028	MBEDTLS_MD_SHA256,
marcozecchini	0:9fca2b23d0ba	6029	MBEDTLS_ECP_DP_SECP256R1,
marcozecchini	0:9fca2b23d0ba	6030	pw, pw_len ) );
marcozecchini	0:9fca2b23d0ba	6031	}
marcozecchini	0:9fca2b23d0ba	6032	#endif /* MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED */
marcozecchini	0:9fca2b23d0ba	6033
marcozecchini	0:9fca2b23d0ba	6034	#if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
marcozecchini	0:9fca2b23d0ba	6035	int mbedtls_ssl_conf_psk( mbedtls_ssl_config *conf,
marcozecchini	0:9fca2b23d0ba	6036	const unsigned char *psk, size_t psk_len,
marcozecchini	0:9fca2b23d0ba	6037	const unsigned char *psk_identity, size_t psk_identity_len )
marcozecchini	0:9fca2b23d0ba	6038	{
marcozecchini	0:9fca2b23d0ba	6039	if( psk == NULL \|\| psk_identity == NULL )
marcozecchini	0:9fca2b23d0ba	6040	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
marcozecchini	0:9fca2b23d0ba	6041
marcozecchini	0:9fca2b23d0ba	6042	if( psk_len > MBEDTLS_PSK_MAX_LEN )
marcozecchini	0:9fca2b23d0ba	6043	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
marcozecchini	0:9fca2b23d0ba	6044
marcozecchini	0:9fca2b23d0ba	6045	/* Identity len will be encoded on two bytes */
marcozecchini	0:9fca2b23d0ba	6046	if( ( psk_identity_len >> 16 ) != 0 \|\|
marcozecchini	0:9fca2b23d0ba	6047	psk_identity_len > MBEDTLS_SSL_MAX_CONTENT_LEN )
marcozecchini	0:9fca2b23d0ba	6048	{
marcozecchini	0:9fca2b23d0ba	6049	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
marcozecchini	0:9fca2b23d0ba	6050	}
marcozecchini	0:9fca2b23d0ba	6051
marcozecchini	0:9fca2b23d0ba	6052	if( conf->psk != NULL \|\| conf->psk_identity != NULL )
marcozecchini	0:9fca2b23d0ba	6053	{
marcozecchini	0:9fca2b23d0ba	6054	mbedtls_free( conf->psk );
marcozecchini	0:9fca2b23d0ba	6055	mbedtls_free( conf->psk_identity );
marcozecchini	0:9fca2b23d0ba	6056	conf->psk = NULL;
marcozecchini	0:9fca2b23d0ba	6057	conf->psk_identity = NULL;
marcozecchini	0:9fca2b23d0ba	6058	}
marcozecchini	0:9fca2b23d0ba	6059
marcozecchini	0:9fca2b23d0ba	6060	if( ( conf->psk = mbedtls_calloc( 1, psk_len ) ) == NULL \|\|
marcozecchini	0:9fca2b23d0ba	6061	( conf->psk_identity = mbedtls_calloc( 1, psk_identity_len ) ) == NULL )
marcozecchini	0:9fca2b23d0ba	6062	{
marcozecchini	0:9fca2b23d0ba	6063	mbedtls_free( conf->psk );
marcozecchini	0:9fca2b23d0ba	6064	mbedtls_free( conf->psk_identity );
marcozecchini	0:9fca2b23d0ba	6065	conf->psk = NULL;
marcozecchini	0:9fca2b23d0ba	6066	conf->psk_identity = NULL;
marcozecchini	0:9fca2b23d0ba	6067	return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
marcozecchini	0:9fca2b23d0ba	6068	}
marcozecchini	0:9fca2b23d0ba	6069
marcozecchini	0:9fca2b23d0ba	6070	conf->psk_len = psk_len;
marcozecchini	0:9fca2b23d0ba	6071	conf->psk_identity_len = psk_identity_len;
marcozecchini	0:9fca2b23d0ba	6072
marcozecchini	0:9fca2b23d0ba	6073	memcpy( conf->psk, psk, conf->psk_len );
marcozecchini	0:9fca2b23d0ba	6074	memcpy( conf->psk_identity, psk_identity, conf->psk_identity_len );
marcozecchini	0:9fca2b23d0ba	6075
marcozecchini	0:9fca2b23d0ba	6076	return( 0 );
marcozecchini	0:9fca2b23d0ba	6077	}
marcozecchini	0:9fca2b23d0ba	6078
marcozecchini	0:9fca2b23d0ba	6079	int mbedtls_ssl_set_hs_psk( mbedtls_ssl_context *ssl,
marcozecchini	0:9fca2b23d0ba	6080	const unsigned char *psk, size_t psk_len )
marcozecchini	0:9fca2b23d0ba	6081	{
marcozecchini	0:9fca2b23d0ba	6082	if( psk == NULL \|\| ssl->handshake == NULL )
marcozecchini	0:9fca2b23d0ba	6083	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
marcozecchini	0:9fca2b23d0ba	6084
marcozecchini	0:9fca2b23d0ba	6085	if( psk_len > MBEDTLS_PSK_MAX_LEN )
marcozecchini	0:9fca2b23d0ba	6086	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
marcozecchini	0:9fca2b23d0ba	6087
marcozecchini	0:9fca2b23d0ba	6088	if( ssl->handshake->psk != NULL )
marcozecchini	0:9fca2b23d0ba	6089	mbedtls_free( ssl->handshake->psk );
marcozecchini	0:9fca2b23d0ba	6090
marcozecchini	0:9fca2b23d0ba	6091	if( ( ssl->handshake->psk = mbedtls_calloc( 1, psk_len ) ) == NULL )
marcozecchini	0:9fca2b23d0ba	6092	return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
marcozecchini	0:9fca2b23d0ba	6093
marcozecchini	0:9fca2b23d0ba	6094	ssl->handshake->psk_len = psk_len;
marcozecchini	0:9fca2b23d0ba	6095	memcpy( ssl->handshake->psk, psk, ssl->handshake->psk_len );
marcozecchini	0:9fca2b23d0ba	6096
marcozecchini	0:9fca2b23d0ba	6097	return( 0 );
marcozecchini	0:9fca2b23d0ba	6098	}
marcozecchini	0:9fca2b23d0ba	6099
marcozecchini	0:9fca2b23d0ba	6100	void mbedtls_ssl_conf_psk_cb( mbedtls_ssl_config *conf,
marcozecchini	0:9fca2b23d0ba	6101	int (f_psk)(void , mbedtls_ssl_context , const unsigned char ,
marcozecchini	0:9fca2b23d0ba	6102	size_t),
marcozecchini	0:9fca2b23d0ba	6103	void *p_psk )
marcozecchini	0:9fca2b23d0ba	6104	{
marcozecchini	0:9fca2b23d0ba	6105	conf->f_psk = f_psk;
marcozecchini	0:9fca2b23d0ba	6106	conf->p_psk = p_psk;
marcozecchini	0:9fca2b23d0ba	6107	}
marcozecchini	0:9fca2b23d0ba	6108	#endif /* MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED */
marcozecchini	0:9fca2b23d0ba	6109
marcozecchini	0:9fca2b23d0ba	6110	#if defined(MBEDTLS_DHM_C) && defined(MBEDTLS_SSL_SRV_C)
marcozecchini	0:9fca2b23d0ba	6111	int mbedtls_ssl_conf_dh_param( mbedtls_ssl_config conf, const char dhm_P, const char *dhm_G )
marcozecchini	0:9fca2b23d0ba	6112	{
marcozecchini	0:9fca2b23d0ba	6113	int ret;
marcozecchini	0:9fca2b23d0ba	6114
marcozecchini	0:9fca2b23d0ba	6115	if( ( ret = mbedtls_mpi_read_string( &conf->dhm_P, 16, dhm_P ) ) != 0 \|\|
marcozecchini	0:9fca2b23d0ba	6116	( ret = mbedtls_mpi_read_string( &conf->dhm_G, 16, dhm_G ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	6117	{
marcozecchini	0:9fca2b23d0ba	6118	mbedtls_mpi_free( &conf->dhm_P );
marcozecchini	0:9fca2b23d0ba	6119	mbedtls_mpi_free( &conf->dhm_G );
marcozecchini	0:9fca2b23d0ba	6120	return( ret );
marcozecchini	0:9fca2b23d0ba	6121	}
marcozecchini	0:9fca2b23d0ba	6122
marcozecchini	0:9fca2b23d0ba	6123	return( 0 );
marcozecchini	0:9fca2b23d0ba	6124	}
marcozecchini	0:9fca2b23d0ba	6125
marcozecchini	0:9fca2b23d0ba	6126	int mbedtls_ssl_conf_dh_param_ctx( mbedtls_ssl_config conf, mbedtls_dhm_context dhm_ctx )
marcozecchini	0:9fca2b23d0ba	6127	{
marcozecchini	0:9fca2b23d0ba	6128	int ret;
marcozecchini	0:9fca2b23d0ba	6129
marcozecchini	0:9fca2b23d0ba	6130	if( ( ret = mbedtls_mpi_copy( &conf->dhm_P, &dhm_ctx->P ) ) != 0 \|\|
marcozecchini	0:9fca2b23d0ba	6131	( ret = mbedtls_mpi_copy( &conf->dhm_G, &dhm_ctx->G ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	6132	{
marcozecchini	0:9fca2b23d0ba	6133	mbedtls_mpi_free( &conf->dhm_P );
marcozecchini	0:9fca2b23d0ba	6134	mbedtls_mpi_free( &conf->dhm_G );
marcozecchini	0:9fca2b23d0ba	6135	return( ret );
marcozecchini	0:9fca2b23d0ba	6136	}
marcozecchini	0:9fca2b23d0ba	6137
marcozecchini	0:9fca2b23d0ba	6138	return( 0 );
marcozecchini	0:9fca2b23d0ba	6139	}
marcozecchini	0:9fca2b23d0ba	6140	#endif /* MBEDTLS_DHM_C && MBEDTLS_SSL_SRV_C */
marcozecchini	0:9fca2b23d0ba	6141
marcozecchini	0:9fca2b23d0ba	6142	#if defined(MBEDTLS_DHM_C) && defined(MBEDTLS_SSL_CLI_C)
marcozecchini	0:9fca2b23d0ba	6143	/*
marcozecchini	0:9fca2b23d0ba	6144	* Set the minimum length for Diffie-Hellman parameters
marcozecchini	0:9fca2b23d0ba	6145	*/
marcozecchini	0:9fca2b23d0ba	6146	void mbedtls_ssl_conf_dhm_min_bitlen( mbedtls_ssl_config *conf,
marcozecchini	0:9fca2b23d0ba	6147	unsigned int bitlen )
marcozecchini	0:9fca2b23d0ba	6148	{
marcozecchini	0:9fca2b23d0ba	6149	conf->dhm_min_bitlen = bitlen;
marcozecchini	0:9fca2b23d0ba	6150	}
marcozecchini	0:9fca2b23d0ba	6151	#endif /* MBEDTLS_DHM_C && MBEDTLS_SSL_CLI_C */
marcozecchini	0:9fca2b23d0ba	6152
marcozecchini	0:9fca2b23d0ba	6153	#if defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
marcozecchini	0:9fca2b23d0ba	6154	/*
marcozecchini	0:9fca2b23d0ba	6155	* Set allowed/preferred hashes for handshake signatures
marcozecchini	0:9fca2b23d0ba	6156	*/
marcozecchini	0:9fca2b23d0ba	6157	void mbedtls_ssl_conf_sig_hashes( mbedtls_ssl_config *conf,
marcozecchini	0:9fca2b23d0ba	6158	const int *hashes )
marcozecchini	0:9fca2b23d0ba	6159	{
marcozecchini	0:9fca2b23d0ba	6160	conf->sig_hashes = hashes;
marcozecchini	0:9fca2b23d0ba	6161	}
marcozecchini	0:9fca2b23d0ba	6162	#endif
marcozecchini	0:9fca2b23d0ba	6163
marcozecchini	0:9fca2b23d0ba	6164	#if defined(MBEDTLS_ECP_C)
marcozecchini	0:9fca2b23d0ba	6165	/*
marcozecchini	0:9fca2b23d0ba	6166	* Set the allowed elliptic curves
marcozecchini	0:9fca2b23d0ba	6167	*/
marcozecchini	0:9fca2b23d0ba	6168	void mbedtls_ssl_conf_curves( mbedtls_ssl_config *conf,
marcozecchini	0:9fca2b23d0ba	6169	const mbedtls_ecp_group_id *curve_list )
marcozecchini	0:9fca2b23d0ba	6170	{
marcozecchini	0:9fca2b23d0ba	6171	conf->curve_list = curve_list;
marcozecchini	0:9fca2b23d0ba	6172	}
marcozecchini	0:9fca2b23d0ba	6173	#endif
marcozecchini	0:9fca2b23d0ba	6174
marcozecchini	0:9fca2b23d0ba	6175	#if defined(MBEDTLS_X509_CRT_PARSE_C)
marcozecchini	0:9fca2b23d0ba	6176	int mbedtls_ssl_set_hostname( mbedtls_ssl_context ssl, const char hostname )
marcozecchini	0:9fca2b23d0ba	6177	{
marcozecchini	0:9fca2b23d0ba	6178	size_t hostname_len;
marcozecchini	0:9fca2b23d0ba	6179
marcozecchini	0:9fca2b23d0ba	6180	if( hostname == NULL )
marcozecchini	0:9fca2b23d0ba	6181	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
marcozecchini	0:9fca2b23d0ba	6182
marcozecchini	0:9fca2b23d0ba	6183	hostname_len = strlen( hostname );
marcozecchini	0:9fca2b23d0ba	6184
marcozecchini	0:9fca2b23d0ba	6185	if( hostname_len + 1 == 0 )
marcozecchini	0:9fca2b23d0ba	6186	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
marcozecchini	0:9fca2b23d0ba	6187
marcozecchini	0:9fca2b23d0ba	6188	if( hostname_len > MBEDTLS_SSL_MAX_HOST_NAME_LEN )
marcozecchini	0:9fca2b23d0ba	6189	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
marcozecchini	0:9fca2b23d0ba	6190
marcozecchini	0:9fca2b23d0ba	6191	ssl->hostname = mbedtls_calloc( 1, hostname_len + 1 );
marcozecchini	0:9fca2b23d0ba	6192
marcozecchini	0:9fca2b23d0ba	6193	if( ssl->hostname == NULL )
marcozecchini	0:9fca2b23d0ba	6194	return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
marcozecchini	0:9fca2b23d0ba	6195
marcozecchini	0:9fca2b23d0ba	6196	memcpy( ssl->hostname, hostname, hostname_len );
marcozecchini	0:9fca2b23d0ba	6197
marcozecchini	0:9fca2b23d0ba	6198	ssl->hostname[hostname_len] = '\0';
marcozecchini	0:9fca2b23d0ba	6199
marcozecchini	0:9fca2b23d0ba	6200	return( 0 );
marcozecchini	0:9fca2b23d0ba	6201	}
marcozecchini	0:9fca2b23d0ba	6202	#endif
marcozecchini	0:9fca2b23d0ba	6203
marcozecchini	0:9fca2b23d0ba	6204	#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
marcozecchini	0:9fca2b23d0ba	6205	void mbedtls_ssl_conf_sni( mbedtls_ssl_config *conf,
marcozecchini	0:9fca2b23d0ba	6206	int (f_sni)(void , mbedtls_ssl_context *,
marcozecchini	0:9fca2b23d0ba	6207	const unsigned char *, size_t),
marcozecchini	0:9fca2b23d0ba	6208	void *p_sni )
marcozecchini	0:9fca2b23d0ba	6209	{
marcozecchini	0:9fca2b23d0ba	6210	conf->f_sni = f_sni;
marcozecchini	0:9fca2b23d0ba	6211	conf->p_sni = p_sni;
marcozecchini	0:9fca2b23d0ba	6212	}
marcozecchini	0:9fca2b23d0ba	6213	#endif /* MBEDTLS_SSL_SERVER_NAME_INDICATION */
marcozecchini	0:9fca2b23d0ba	6214
marcozecchini	0:9fca2b23d0ba	6215	#if defined(MBEDTLS_SSL_ALPN)
marcozecchini	0:9fca2b23d0ba	6216	int mbedtls_ssl_conf_alpn_protocols( mbedtls_ssl_config conf, const char *protos )
marcozecchini	0:9fca2b23d0ba	6217	{
marcozecchini	0:9fca2b23d0ba	6218	size_t cur_len, tot_len;
marcozecchini	0:9fca2b23d0ba	6219	const char **p;
marcozecchini	0:9fca2b23d0ba	6220
marcozecchini	0:9fca2b23d0ba	6221	/*
marcozecchini	0:9fca2b23d0ba	6222	* RFC 7301 3.1: "Empty strings MUST NOT be included and byte strings
marcozecchini	0:9fca2b23d0ba	6223	* MUST NOT be truncated."
marcozecchini	0:9fca2b23d0ba	6224	* We check lengths now rather than later.
marcozecchini	0:9fca2b23d0ba	6225	*/
marcozecchini	0:9fca2b23d0ba	6226	tot_len = 0;
marcozecchini	0:9fca2b23d0ba	6227	for( p = protos; *p != NULL; p++ )
marcozecchini	0:9fca2b23d0ba	6228	{
marcozecchini	0:9fca2b23d0ba	6229	cur_len = strlen( *p );
marcozecchini	0:9fca2b23d0ba	6230	tot_len += cur_len;
marcozecchini	0:9fca2b23d0ba	6231
marcozecchini	0:9fca2b23d0ba	6232	if( cur_len == 0 \|\| cur_len > 255 \|\| tot_len > 65535 )
marcozecchini	0:9fca2b23d0ba	6233	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
marcozecchini	0:9fca2b23d0ba	6234	}
marcozecchini	0:9fca2b23d0ba	6235
marcozecchini	0:9fca2b23d0ba	6236	conf->alpn_list = protos;
marcozecchini	0:9fca2b23d0ba	6237
marcozecchini	0:9fca2b23d0ba	6238	return( 0 );
marcozecchini	0:9fca2b23d0ba	6239	}
marcozecchini	0:9fca2b23d0ba	6240
marcozecchini	0:9fca2b23d0ba	6241	const char mbedtls_ssl_get_alpn_protocol( const mbedtls_ssl_context ssl )
marcozecchini	0:9fca2b23d0ba	6242	{
marcozecchini	0:9fca2b23d0ba	6243	return( ssl->alpn_chosen );
marcozecchini	0:9fca2b23d0ba	6244	}
marcozecchini	0:9fca2b23d0ba	6245	#endif /* MBEDTLS_SSL_ALPN */
marcozecchini	0:9fca2b23d0ba	6246
marcozecchini	0:9fca2b23d0ba	6247	void mbedtls_ssl_conf_max_version( mbedtls_ssl_config *conf, int major, int minor )
marcozecchini	0:9fca2b23d0ba	6248	{
marcozecchini	0:9fca2b23d0ba	6249	conf->max_major_ver = major;
marcozecchini	0:9fca2b23d0ba	6250	conf->max_minor_ver = minor;
marcozecchini	0:9fca2b23d0ba	6251	}
marcozecchini	0:9fca2b23d0ba	6252
marcozecchini	0:9fca2b23d0ba	6253	void mbedtls_ssl_conf_min_version( mbedtls_ssl_config *conf, int major, int minor )
marcozecchini	0:9fca2b23d0ba	6254	{
marcozecchini	0:9fca2b23d0ba	6255	conf->min_major_ver = major;
marcozecchini	0:9fca2b23d0ba	6256	conf->min_minor_ver = minor;
marcozecchini	0:9fca2b23d0ba	6257	}
marcozecchini	0:9fca2b23d0ba	6258
marcozecchini	0:9fca2b23d0ba	6259	#if defined(MBEDTLS_SSL_FALLBACK_SCSV) && defined(MBEDTLS_SSL_CLI_C)
marcozecchini	0:9fca2b23d0ba	6260	void mbedtls_ssl_conf_fallback( mbedtls_ssl_config *conf, char fallback )
marcozecchini	0:9fca2b23d0ba	6261	{
marcozecchini	0:9fca2b23d0ba	6262	conf->fallback = fallback;
marcozecchini	0:9fca2b23d0ba	6263	}
marcozecchini	0:9fca2b23d0ba	6264	#endif
marcozecchini	0:9fca2b23d0ba	6265
marcozecchini	0:9fca2b23d0ba	6266	#if defined(MBEDTLS_SSL_SRV_C)
marcozecchini	0:9fca2b23d0ba	6267	void mbedtls_ssl_conf_cert_req_ca_list( mbedtls_ssl_config *conf,
marcozecchini	0:9fca2b23d0ba	6268	char cert_req_ca_list )
marcozecchini	0:9fca2b23d0ba	6269	{
marcozecchini	0:9fca2b23d0ba	6270	conf->cert_req_ca_list = cert_req_ca_list;
marcozecchini	0:9fca2b23d0ba	6271	}
marcozecchini	0:9fca2b23d0ba	6272	#endif
marcozecchini	0:9fca2b23d0ba	6273
marcozecchini	0:9fca2b23d0ba	6274	#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
marcozecchini	0:9fca2b23d0ba	6275	void mbedtls_ssl_conf_encrypt_then_mac( mbedtls_ssl_config *conf, char etm )
marcozecchini	0:9fca2b23d0ba	6276	{
marcozecchini	0:9fca2b23d0ba	6277	conf->encrypt_then_mac = etm;
marcozecchini	0:9fca2b23d0ba	6278	}
marcozecchini	0:9fca2b23d0ba	6279	#endif
marcozecchini	0:9fca2b23d0ba	6280
marcozecchini	0:9fca2b23d0ba	6281	#if defined(MBEDTLS_SSL_EXTENDED_MASTER_SECRET)
marcozecchini	0:9fca2b23d0ba	6282	void mbedtls_ssl_conf_extended_master_secret( mbedtls_ssl_config *conf, char ems )
marcozecchini	0:9fca2b23d0ba	6283	{
marcozecchini	0:9fca2b23d0ba	6284	conf->extended_ms = ems;
marcozecchini	0:9fca2b23d0ba	6285	}
marcozecchini	0:9fca2b23d0ba	6286	#endif
marcozecchini	0:9fca2b23d0ba	6287
marcozecchini	0:9fca2b23d0ba	6288	#if defined(MBEDTLS_ARC4_C)
marcozecchini	0:9fca2b23d0ba	6289	void mbedtls_ssl_conf_arc4_support( mbedtls_ssl_config *conf, char arc4 )
marcozecchini	0:9fca2b23d0ba	6290	{
marcozecchini	0:9fca2b23d0ba	6291	conf->arc4_disabled = arc4;
marcozecchini	0:9fca2b23d0ba	6292	}
marcozecchini	0:9fca2b23d0ba	6293	#endif
marcozecchini	0:9fca2b23d0ba	6294
marcozecchini	0:9fca2b23d0ba	6295	#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
marcozecchini	0:9fca2b23d0ba	6296	int mbedtls_ssl_conf_max_frag_len( mbedtls_ssl_config *conf, unsigned char mfl_code )
marcozecchini	0:9fca2b23d0ba	6297	{
marcozecchini	0:9fca2b23d0ba	6298	if( mfl_code >= MBEDTLS_SSL_MAX_FRAG_LEN_INVALID \|\|
marcozecchini	0:9fca2b23d0ba	6299	mfl_code_to_length[mfl_code] > MBEDTLS_SSL_MAX_CONTENT_LEN )
marcozecchini	0:9fca2b23d0ba	6300	{
marcozecchini	0:9fca2b23d0ba	6301	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
marcozecchini	0:9fca2b23d0ba	6302	}
marcozecchini	0:9fca2b23d0ba	6303
marcozecchini	0:9fca2b23d0ba	6304	conf->mfl_code = mfl_code;
marcozecchini	0:9fca2b23d0ba	6305
marcozecchini	0:9fca2b23d0ba	6306	return( 0 );
marcozecchini	0:9fca2b23d0ba	6307	}
marcozecchini	0:9fca2b23d0ba	6308	#endif /* MBEDTLS_SSL_MAX_FRAGMENT_LENGTH */
marcozecchini	0:9fca2b23d0ba	6309
marcozecchini	0:9fca2b23d0ba	6310	#if defined(MBEDTLS_SSL_TRUNCATED_HMAC)
marcozecchini	0:9fca2b23d0ba	6311	void mbedtls_ssl_conf_truncated_hmac( mbedtls_ssl_config *conf, int truncate )
marcozecchini	0:9fca2b23d0ba	6312	{
marcozecchini	0:9fca2b23d0ba	6313	conf->trunc_hmac = truncate;
marcozecchini	0:9fca2b23d0ba	6314	}
marcozecchini	0:9fca2b23d0ba	6315	#endif /* MBEDTLS_SSL_TRUNCATED_HMAC */
marcozecchini	0:9fca2b23d0ba	6316
marcozecchini	0:9fca2b23d0ba	6317	#if defined(MBEDTLS_SSL_CBC_RECORD_SPLITTING)
marcozecchini	0:9fca2b23d0ba	6318	void mbedtls_ssl_conf_cbc_record_splitting( mbedtls_ssl_config *conf, char split )
marcozecchini	0:9fca2b23d0ba	6319	{
marcozecchini	0:9fca2b23d0ba	6320	conf->cbc_record_splitting = split;
marcozecchini	0:9fca2b23d0ba	6321	}
marcozecchini	0:9fca2b23d0ba	6322	#endif
marcozecchini	0:9fca2b23d0ba	6323
marcozecchini	0:9fca2b23d0ba	6324	void mbedtls_ssl_conf_legacy_renegotiation( mbedtls_ssl_config *conf, int allow_legacy )
marcozecchini	0:9fca2b23d0ba	6325	{
marcozecchini	0:9fca2b23d0ba	6326	conf->allow_legacy_renegotiation = allow_legacy;
marcozecchini	0:9fca2b23d0ba	6327	}
marcozecchini	0:9fca2b23d0ba	6328
marcozecchini	0:9fca2b23d0ba	6329	#if defined(MBEDTLS_SSL_RENEGOTIATION)
marcozecchini	0:9fca2b23d0ba	6330	void mbedtls_ssl_conf_renegotiation( mbedtls_ssl_config *conf, int renegotiation )
marcozecchini	0:9fca2b23d0ba	6331	{
marcozecchini	0:9fca2b23d0ba	6332	conf->disable_renegotiation = renegotiation;
marcozecchini	0:9fca2b23d0ba	6333	}
marcozecchini	0:9fca2b23d0ba	6334
marcozecchini	0:9fca2b23d0ba	6335	void mbedtls_ssl_conf_renegotiation_enforced( mbedtls_ssl_config *conf, int max_records )
marcozecchini	0:9fca2b23d0ba	6336	{
marcozecchini	0:9fca2b23d0ba	6337	conf->renego_max_records = max_records;
marcozecchini	0:9fca2b23d0ba	6338	}
marcozecchini	0:9fca2b23d0ba	6339
marcozecchini	0:9fca2b23d0ba	6340	void mbedtls_ssl_conf_renegotiation_period( mbedtls_ssl_config *conf,
marcozecchini	0:9fca2b23d0ba	6341	const unsigned char period[8] )
marcozecchini	0:9fca2b23d0ba	6342	{
marcozecchini	0:9fca2b23d0ba	6343	memcpy( conf->renego_period, period, 8 );
marcozecchini	0:9fca2b23d0ba	6344	}
marcozecchini	0:9fca2b23d0ba	6345	#endif /* MBEDTLS_SSL_RENEGOTIATION */
marcozecchini	0:9fca2b23d0ba	6346
marcozecchini	0:9fca2b23d0ba	6347	#if defined(MBEDTLS_SSL_SESSION_TICKETS)
marcozecchini	0:9fca2b23d0ba	6348	#if defined(MBEDTLS_SSL_CLI_C)
marcozecchini	0:9fca2b23d0ba	6349	void mbedtls_ssl_conf_session_tickets( mbedtls_ssl_config *conf, int use_tickets )
marcozecchini	0:9fca2b23d0ba	6350	{
marcozecchini	0:9fca2b23d0ba	6351	conf->session_tickets = use_tickets;
marcozecchini	0:9fca2b23d0ba	6352	}
marcozecchini	0:9fca2b23d0ba	6353	#endif
marcozecchini	0:9fca2b23d0ba	6354
marcozecchini	0:9fca2b23d0ba	6355	#if defined(MBEDTLS_SSL_SRV_C)
marcozecchini	0:9fca2b23d0ba	6356	void mbedtls_ssl_conf_session_tickets_cb( mbedtls_ssl_config *conf,
marcozecchini	0:9fca2b23d0ba	6357	mbedtls_ssl_ticket_write_t *f_ticket_write,
marcozecchini	0:9fca2b23d0ba	6358	mbedtls_ssl_ticket_parse_t *f_ticket_parse,
marcozecchini	0:9fca2b23d0ba	6359	void *p_ticket )
marcozecchini	0:9fca2b23d0ba	6360	{
marcozecchini	0:9fca2b23d0ba	6361	conf->f_ticket_write = f_ticket_write;
marcozecchini	0:9fca2b23d0ba	6362	conf->f_ticket_parse = f_ticket_parse;
marcozecchini	0:9fca2b23d0ba	6363	conf->p_ticket = p_ticket;
marcozecchini	0:9fca2b23d0ba	6364	}
marcozecchini	0:9fca2b23d0ba	6365	#endif
marcozecchini	0:9fca2b23d0ba	6366	#endif /* MBEDTLS_SSL_SESSION_TICKETS */
marcozecchini	0:9fca2b23d0ba	6367
marcozecchini	0:9fca2b23d0ba	6368	#if defined(MBEDTLS_SSL_EXPORT_KEYS)
marcozecchini	0:9fca2b23d0ba	6369	void mbedtls_ssl_conf_export_keys_cb( mbedtls_ssl_config *conf,
marcozecchini	0:9fca2b23d0ba	6370	mbedtls_ssl_export_keys_t *f_export_keys,
marcozecchini	0:9fca2b23d0ba	6371	void *p_export_keys )
marcozecchini	0:9fca2b23d0ba	6372	{
marcozecchini	0:9fca2b23d0ba	6373	conf->f_export_keys = f_export_keys;
marcozecchini	0:9fca2b23d0ba	6374	conf->p_export_keys = p_export_keys;
marcozecchini	0:9fca2b23d0ba	6375	}
marcozecchini	0:9fca2b23d0ba	6376	#endif
marcozecchini	0:9fca2b23d0ba	6377
marcozecchini	0:9fca2b23d0ba	6378	/*
marcozecchini	0:9fca2b23d0ba	6379	* SSL get accessors
marcozecchini	0:9fca2b23d0ba	6380	*/
marcozecchini	0:9fca2b23d0ba	6381	size_t mbedtls_ssl_get_bytes_avail( const mbedtls_ssl_context *ssl )
marcozecchini	0:9fca2b23d0ba	6382	{
marcozecchini	0:9fca2b23d0ba	6383	return( ssl->in_offt == NULL ? 0 : ssl->in_msglen );
marcozecchini	0:9fca2b23d0ba	6384	}
marcozecchini	0:9fca2b23d0ba	6385
marcozecchini	0:9fca2b23d0ba	6386	uint32_t mbedtls_ssl_get_verify_result( const mbedtls_ssl_context *ssl )
marcozecchini	0:9fca2b23d0ba	6387	{
marcozecchini	0:9fca2b23d0ba	6388	if( ssl->session != NULL )
marcozecchini	0:9fca2b23d0ba	6389	return( ssl->session->verify_result );
marcozecchini	0:9fca2b23d0ba	6390
marcozecchini	0:9fca2b23d0ba	6391	if( ssl->session_negotiate != NULL )
marcozecchini	0:9fca2b23d0ba	6392	return( ssl->session_negotiate->verify_result );
marcozecchini	0:9fca2b23d0ba	6393
marcozecchini	0:9fca2b23d0ba	6394	return( 0xFFFFFFFF );
marcozecchini	0:9fca2b23d0ba	6395	}
marcozecchini	0:9fca2b23d0ba	6396
marcozecchini	0:9fca2b23d0ba	6397	const char mbedtls_ssl_get_ciphersuite( const mbedtls_ssl_context ssl )
marcozecchini	0:9fca2b23d0ba	6398	{
marcozecchini	0:9fca2b23d0ba	6399	if( ssl == NULL \|\| ssl->session == NULL )
marcozecchini	0:9fca2b23d0ba	6400	return( NULL );
marcozecchini	0:9fca2b23d0ba	6401
marcozecchini	0:9fca2b23d0ba	6402	return mbedtls_ssl_get_ciphersuite_name( ssl->session->ciphersuite );
marcozecchini	0:9fca2b23d0ba	6403	}
marcozecchini	0:9fca2b23d0ba	6404
marcozecchini	0:9fca2b23d0ba	6405	const char mbedtls_ssl_get_version( const mbedtls_ssl_context ssl )
marcozecchini	0:9fca2b23d0ba	6406	{
marcozecchini	0:9fca2b23d0ba	6407	#if defined(MBEDTLS_SSL_PROTO_DTLS)
marcozecchini	0:9fca2b23d0ba	6408	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
marcozecchini	0:9fca2b23d0ba	6409	{
marcozecchini	0:9fca2b23d0ba	6410	switch( ssl->minor_ver )
marcozecchini	0:9fca2b23d0ba	6411	{
marcozecchini	0:9fca2b23d0ba	6412	case MBEDTLS_SSL_MINOR_VERSION_2:
marcozecchini	0:9fca2b23d0ba	6413	return( "DTLSv1.0" );
marcozecchini	0:9fca2b23d0ba	6414
marcozecchini	0:9fca2b23d0ba	6415	case MBEDTLS_SSL_MINOR_VERSION_3:
marcozecchini	0:9fca2b23d0ba	6416	return( "DTLSv1.2" );
marcozecchini	0:9fca2b23d0ba	6417
marcozecchini	0:9fca2b23d0ba	6418	default:
marcozecchini	0:9fca2b23d0ba	6419	return( "unknown (DTLS)" );
marcozecchini	0:9fca2b23d0ba	6420	}
marcozecchini	0:9fca2b23d0ba	6421	}
marcozecchini	0:9fca2b23d0ba	6422	#endif
marcozecchini	0:9fca2b23d0ba	6423
marcozecchini	0:9fca2b23d0ba	6424	switch( ssl->minor_ver )
marcozecchini	0:9fca2b23d0ba	6425	{
marcozecchini	0:9fca2b23d0ba	6426	case MBEDTLS_SSL_MINOR_VERSION_0:
marcozecchini	0:9fca2b23d0ba	6427	return( "SSLv3.0" );
marcozecchini	0:9fca2b23d0ba	6428
marcozecchini	0:9fca2b23d0ba	6429	case MBEDTLS_SSL_MINOR_VERSION_1:
marcozecchini	0:9fca2b23d0ba	6430	return( "TLSv1.0" );
marcozecchini	0:9fca2b23d0ba	6431
marcozecchini	0:9fca2b23d0ba	6432	case MBEDTLS_SSL_MINOR_VERSION_2:
marcozecchini	0:9fca2b23d0ba	6433	return( "TLSv1.1" );
marcozecchini	0:9fca2b23d0ba	6434
marcozecchini	0:9fca2b23d0ba	6435	case MBEDTLS_SSL_MINOR_VERSION_3:
marcozecchini	0:9fca2b23d0ba	6436	return( "TLSv1.2" );
marcozecchini	0:9fca2b23d0ba	6437
marcozecchini	0:9fca2b23d0ba	6438	default:
marcozecchini	0:9fca2b23d0ba	6439	return( "unknown" );
marcozecchini	0:9fca2b23d0ba	6440	}
marcozecchini	0:9fca2b23d0ba	6441	}
marcozecchini	0:9fca2b23d0ba	6442
marcozecchini	0:9fca2b23d0ba	6443	int mbedtls_ssl_get_record_expansion( const mbedtls_ssl_context *ssl )
marcozecchini	0:9fca2b23d0ba	6444	{
marcozecchini	0:9fca2b23d0ba	6445	size_t transform_expansion;
marcozecchini	0:9fca2b23d0ba	6446	const mbedtls_ssl_transform *transform = ssl->transform_out;
marcozecchini	0:9fca2b23d0ba	6447
marcozecchini	0:9fca2b23d0ba	6448	#if defined(MBEDTLS_ZLIB_SUPPORT)
marcozecchini	0:9fca2b23d0ba	6449	if( ssl->session_out->compression != MBEDTLS_SSL_COMPRESS_NULL )
marcozecchini	0:9fca2b23d0ba	6450	return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE );
marcozecchini	0:9fca2b23d0ba	6451	#endif
marcozecchini	0:9fca2b23d0ba	6452
marcozecchini	0:9fca2b23d0ba	6453	if( transform == NULL )
marcozecchini	0:9fca2b23d0ba	6454	return( (int) mbedtls_ssl_hdr_len( ssl ) );
marcozecchini	0:9fca2b23d0ba	6455
marcozecchini	0:9fca2b23d0ba	6456	switch( mbedtls_cipher_get_cipher_mode( &transform->cipher_ctx_enc ) )
marcozecchini	0:9fca2b23d0ba	6457	{
marcozecchini	0:9fca2b23d0ba	6458	case MBEDTLS_MODE_GCM:
marcozecchini	0:9fca2b23d0ba	6459	case MBEDTLS_MODE_CCM:
marcozecchini	0:9fca2b23d0ba	6460	case MBEDTLS_MODE_STREAM:
marcozecchini	0:9fca2b23d0ba	6461	transform_expansion = transform->minlen;
marcozecchini	0:9fca2b23d0ba	6462	break;
marcozecchini	0:9fca2b23d0ba	6463
marcozecchini	0:9fca2b23d0ba	6464	case MBEDTLS_MODE_CBC:
marcozecchini	0:9fca2b23d0ba	6465	transform_expansion = transform->maclen
marcozecchini	0:9fca2b23d0ba	6466	+ mbedtls_cipher_get_block_size( &transform->cipher_ctx_enc );
marcozecchini	0:9fca2b23d0ba	6467	break;
marcozecchini	0:9fca2b23d0ba	6468
marcozecchini	0:9fca2b23d0ba	6469	default:
marcozecchini	0:9fca2b23d0ba	6470	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
marcozecchini	0:9fca2b23d0ba	6471	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
marcozecchini	0:9fca2b23d0ba	6472	}
marcozecchini	0:9fca2b23d0ba	6473
marcozecchini	0:9fca2b23d0ba	6474	return( (int)( mbedtls_ssl_hdr_len( ssl ) + transform_expansion ) );
marcozecchini	0:9fca2b23d0ba	6475	}
marcozecchini	0:9fca2b23d0ba	6476
marcozecchini	0:9fca2b23d0ba	6477	#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
marcozecchini	0:9fca2b23d0ba	6478	size_t mbedtls_ssl_get_max_frag_len( const mbedtls_ssl_context *ssl )
marcozecchini	0:9fca2b23d0ba	6479	{
marcozecchini	0:9fca2b23d0ba	6480	size_t max_len;
marcozecchini	0:9fca2b23d0ba	6481
marcozecchini	0:9fca2b23d0ba	6482	/*
marcozecchini	0:9fca2b23d0ba	6483	* Assume mfl_code is correct since it was checked when set
marcozecchini	0:9fca2b23d0ba	6484	*/
marcozecchini	0:9fca2b23d0ba	6485	max_len = mfl_code_to_length[ssl->conf->mfl_code];
marcozecchini	0:9fca2b23d0ba	6486
marcozecchini	0:9fca2b23d0ba	6487	/*
marcozecchini	0:9fca2b23d0ba	6488	* Check if a smaller max length was negotiated
marcozecchini	0:9fca2b23d0ba	6489	*/
marcozecchini	0:9fca2b23d0ba	6490	if( ssl->session_out != NULL &&
marcozecchini	0:9fca2b23d0ba	6491	mfl_code_to_length[ssl->session_out->mfl_code] < max_len )
marcozecchini	0:9fca2b23d0ba	6492	{
marcozecchini	0:9fca2b23d0ba	6493	max_len = mfl_code_to_length[ssl->session_out->mfl_code];
marcozecchini	0:9fca2b23d0ba	6494	}
marcozecchini	0:9fca2b23d0ba	6495
marcozecchini	0:9fca2b23d0ba	6496	return max_len;
marcozecchini	0:9fca2b23d0ba	6497	}
marcozecchini	0:9fca2b23d0ba	6498	#endif /* MBEDTLS_SSL_MAX_FRAGMENT_LENGTH */
marcozecchini	0:9fca2b23d0ba	6499
marcozecchini	0:9fca2b23d0ba	6500	#if defined(MBEDTLS_X509_CRT_PARSE_C)
marcozecchini	0:9fca2b23d0ba	6501	const mbedtls_x509_crt mbedtls_ssl_get_peer_cert( const mbedtls_ssl_context ssl )
marcozecchini	0:9fca2b23d0ba	6502	{
marcozecchini	0:9fca2b23d0ba	6503	if( ssl == NULL \|\| ssl->session == NULL )
marcozecchini	0:9fca2b23d0ba	6504	return( NULL );
marcozecchini	0:9fca2b23d0ba	6505
marcozecchini	0:9fca2b23d0ba	6506	return( ssl->session->peer_cert );
marcozecchini	0:9fca2b23d0ba	6507	}
marcozecchini	0:9fca2b23d0ba	6508	#endif /* MBEDTLS_X509_CRT_PARSE_C */
marcozecchini	0:9fca2b23d0ba	6509
marcozecchini	0:9fca2b23d0ba	6510	#if defined(MBEDTLS_SSL_CLI_C)
marcozecchini	0:9fca2b23d0ba	6511	int mbedtls_ssl_get_session( const mbedtls_ssl_context ssl, mbedtls_ssl_session dst )
marcozecchini	0:9fca2b23d0ba	6512	{
marcozecchini	0:9fca2b23d0ba	6513	if( ssl == NULL \|\|
marcozecchini	0:9fca2b23d0ba	6514	dst == NULL \|\|
marcozecchini	0:9fca2b23d0ba	6515	ssl->session == NULL \|\|
marcozecchini	0:9fca2b23d0ba	6516	ssl->conf->endpoint != MBEDTLS_SSL_IS_CLIENT )
marcozecchini	0:9fca2b23d0ba	6517	{
marcozecchini	0:9fca2b23d0ba	6518	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
marcozecchini	0:9fca2b23d0ba	6519	}
marcozecchini	0:9fca2b23d0ba	6520
marcozecchini	0:9fca2b23d0ba	6521	return( ssl_session_copy( dst, ssl->session ) );
marcozecchini	0:9fca2b23d0ba	6522	}
marcozecchini	0:9fca2b23d0ba	6523	#endif /* MBEDTLS_SSL_CLI_C */
marcozecchini	0:9fca2b23d0ba	6524
marcozecchini	0:9fca2b23d0ba	6525	/*
marcozecchini	0:9fca2b23d0ba	6526	* Perform a single step of the SSL handshake
marcozecchini	0:9fca2b23d0ba	6527	*/
marcozecchini	0:9fca2b23d0ba	6528	int mbedtls_ssl_handshake_step( mbedtls_ssl_context *ssl )
marcozecchini	0:9fca2b23d0ba	6529	{
marcozecchini	0:9fca2b23d0ba	6530	int ret = MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE;
marcozecchini	0:9fca2b23d0ba	6531
marcozecchini	0:9fca2b23d0ba	6532	if( ssl == NULL \|\| ssl->conf == NULL )
marcozecchini	0:9fca2b23d0ba	6533	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
marcozecchini	0:9fca2b23d0ba	6534
marcozecchini	0:9fca2b23d0ba	6535	#if defined(MBEDTLS_SSL_CLI_C)
marcozecchini	0:9fca2b23d0ba	6536	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_CLIENT )
marcozecchini	0:9fca2b23d0ba	6537	ret = mbedtls_ssl_handshake_client_step( ssl );
marcozecchini	0:9fca2b23d0ba	6538	#endif
marcozecchini	0:9fca2b23d0ba	6539	#if defined(MBEDTLS_SSL_SRV_C)
marcozecchini	0:9fca2b23d0ba	6540	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER )
marcozecchini	0:9fca2b23d0ba	6541	ret = mbedtls_ssl_handshake_server_step( ssl );
marcozecchini	0:9fca2b23d0ba	6542	#endif
marcozecchini	0:9fca2b23d0ba	6543
marcozecchini	0:9fca2b23d0ba	6544	return( ret );
marcozecchini	0:9fca2b23d0ba	6545	}
marcozecchini	0:9fca2b23d0ba	6546
marcozecchini	0:9fca2b23d0ba	6547	/*
marcozecchini	0:9fca2b23d0ba	6548	* Perform the SSL handshake
marcozecchini	0:9fca2b23d0ba	6549	*/
marcozecchini	0:9fca2b23d0ba	6550	int mbedtls_ssl_handshake( mbedtls_ssl_context *ssl )
marcozecchini	0:9fca2b23d0ba	6551	{
marcozecchini	0:9fca2b23d0ba	6552	int ret = 0;
marcozecchini	0:9fca2b23d0ba	6553
marcozecchini	0:9fca2b23d0ba	6554	if( ssl == NULL \|\| ssl->conf == NULL )
marcozecchini	0:9fca2b23d0ba	6555	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
marcozecchini	0:9fca2b23d0ba	6556
marcozecchini	0:9fca2b23d0ba	6557	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> handshake" ) );
marcozecchini	0:9fca2b23d0ba	6558
marcozecchini	0:9fca2b23d0ba	6559	while( ssl->state != MBEDTLS_SSL_HANDSHAKE_OVER )
marcozecchini	0:9fca2b23d0ba	6560	{
marcozecchini	0:9fca2b23d0ba	6561	ret = mbedtls_ssl_handshake_step( ssl );
marcozecchini	0:9fca2b23d0ba	6562
marcozecchini	0:9fca2b23d0ba	6563	if( ret != 0 )
marcozecchini	0:9fca2b23d0ba	6564	break;
marcozecchini	0:9fca2b23d0ba	6565	}
marcozecchini	0:9fca2b23d0ba	6566
marcozecchini	0:9fca2b23d0ba	6567	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= handshake" ) );
marcozecchini	0:9fca2b23d0ba	6568
marcozecchini	0:9fca2b23d0ba	6569	return( ret );
marcozecchini	0:9fca2b23d0ba	6570	}
marcozecchini	0:9fca2b23d0ba	6571
marcozecchini	0:9fca2b23d0ba	6572	#if defined(MBEDTLS_SSL_RENEGOTIATION)
marcozecchini	0:9fca2b23d0ba	6573	#if defined(MBEDTLS_SSL_SRV_C)
marcozecchini	0:9fca2b23d0ba	6574	/*
marcozecchini	0:9fca2b23d0ba	6575	* Write HelloRequest to request renegotiation on server
marcozecchini	0:9fca2b23d0ba	6576	*/
marcozecchini	0:9fca2b23d0ba	6577	static int ssl_write_hello_request( mbedtls_ssl_context *ssl )
marcozecchini	0:9fca2b23d0ba	6578	{
marcozecchini	0:9fca2b23d0ba	6579	int ret;
marcozecchini	0:9fca2b23d0ba	6580
marcozecchini	0:9fca2b23d0ba	6581	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write hello request" ) );
marcozecchini	0:9fca2b23d0ba	6582
marcozecchini	0:9fca2b23d0ba	6583	ssl->out_msglen = 4;
marcozecchini	0:9fca2b23d0ba	6584	ssl->out_msgtype = MBEDTLS_SSL_MSG_HANDSHAKE;
marcozecchini	0:9fca2b23d0ba	6585	ssl->out_msg[0] = MBEDTLS_SSL_HS_HELLO_REQUEST;
marcozecchini	0:9fca2b23d0ba	6586
marcozecchini	0:9fca2b23d0ba	6587	if( ( ret = mbedtls_ssl_write_record( ssl ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	6588	{
marcozecchini	0:9fca2b23d0ba	6589	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_write_record", ret );
marcozecchini	0:9fca2b23d0ba	6590	return( ret );
marcozecchini	0:9fca2b23d0ba	6591	}
marcozecchini	0:9fca2b23d0ba	6592
marcozecchini	0:9fca2b23d0ba	6593	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= write hello request" ) );
marcozecchini	0:9fca2b23d0ba	6594
marcozecchini	0:9fca2b23d0ba	6595	return( 0 );
marcozecchini	0:9fca2b23d0ba	6596	}
marcozecchini	0:9fca2b23d0ba	6597	#endif /* MBEDTLS_SSL_SRV_C */
marcozecchini	0:9fca2b23d0ba	6598
marcozecchini	0:9fca2b23d0ba	6599	/*
marcozecchini	0:9fca2b23d0ba	6600	* Actually renegotiate current connection, triggered by either:
marcozecchini	0:9fca2b23d0ba	6601	* - any side: calling mbedtls_ssl_renegotiate(),
marcozecchini	0:9fca2b23d0ba	6602	* - client: receiving a HelloRequest during mbedtls_ssl_read(),
marcozecchini	0:9fca2b23d0ba	6603	* - server: receiving any handshake message on server during mbedtls_ssl_read() after
marcozecchini	0:9fca2b23d0ba	6604	* the initial handshake is completed.
marcozecchini	0:9fca2b23d0ba	6605	* If the handshake doesn't complete due to waiting for I/O, it will continue
marcozecchini	0:9fca2b23d0ba	6606	* during the next calls to mbedtls_ssl_renegotiate() or mbedtls_ssl_read() respectively.
marcozecchini	0:9fca2b23d0ba	6607	*/
marcozecchini	0:9fca2b23d0ba	6608	static int ssl_start_renegotiation( mbedtls_ssl_context *ssl )
marcozecchini	0:9fca2b23d0ba	6609	{
marcozecchini	0:9fca2b23d0ba	6610	int ret;
marcozecchini	0:9fca2b23d0ba	6611
marcozecchini	0:9fca2b23d0ba	6612	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> renegotiate" ) );
marcozecchini	0:9fca2b23d0ba	6613
marcozecchini	0:9fca2b23d0ba	6614	if( ( ret = ssl_handshake_init( ssl ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	6615	return( ret );
marcozecchini	0:9fca2b23d0ba	6616
marcozecchini	0:9fca2b23d0ba	6617	/* RFC 6347 4.2.2: "[...] the HelloRequest will have message_seq = 0 and
marcozecchini	0:9fca2b23d0ba	6618	* the ServerHello will have message_seq = 1" */
marcozecchini	0:9fca2b23d0ba	6619	#if defined(MBEDTLS_SSL_PROTO_DTLS)
marcozecchini	0:9fca2b23d0ba	6620	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM &&
marcozecchini	0:9fca2b23d0ba	6621	ssl->renego_status == MBEDTLS_SSL_RENEGOTIATION_PENDING )
marcozecchini	0:9fca2b23d0ba	6622	{
marcozecchini	0:9fca2b23d0ba	6623	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER )
marcozecchini	0:9fca2b23d0ba	6624	ssl->handshake->out_msg_seq = 1;
marcozecchini	0:9fca2b23d0ba	6625	else
marcozecchini	0:9fca2b23d0ba	6626	ssl->handshake->in_msg_seq = 1;
marcozecchini	0:9fca2b23d0ba	6627	}
marcozecchini	0:9fca2b23d0ba	6628	#endif
marcozecchini	0:9fca2b23d0ba	6629
marcozecchini	0:9fca2b23d0ba	6630	ssl->state = MBEDTLS_SSL_HELLO_REQUEST;
marcozecchini	0:9fca2b23d0ba	6631	ssl->renego_status = MBEDTLS_SSL_RENEGOTIATION_IN_PROGRESS;
marcozecchini	0:9fca2b23d0ba	6632
marcozecchini	0:9fca2b23d0ba	6633	if( ( ret = mbedtls_ssl_handshake( ssl ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	6634	{
marcozecchini	0:9fca2b23d0ba	6635	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_handshake", ret );
marcozecchini	0:9fca2b23d0ba	6636	return( ret );
marcozecchini	0:9fca2b23d0ba	6637	}
marcozecchini	0:9fca2b23d0ba	6638
marcozecchini	0:9fca2b23d0ba	6639	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= renegotiate" ) );
marcozecchini	0:9fca2b23d0ba	6640
marcozecchini	0:9fca2b23d0ba	6641	return( 0 );
marcozecchini	0:9fca2b23d0ba	6642	}
marcozecchini	0:9fca2b23d0ba	6643
marcozecchini	0:9fca2b23d0ba	6644	/*
marcozecchini	0:9fca2b23d0ba	6645	* Renegotiate current connection on client,
marcozecchini	0:9fca2b23d0ba	6646	* or request renegotiation on server
marcozecchini	0:9fca2b23d0ba	6647	*/
marcozecchini	0:9fca2b23d0ba	6648	int mbedtls_ssl_renegotiate( mbedtls_ssl_context *ssl )
marcozecchini	0:9fca2b23d0ba	6649	{
marcozecchini	0:9fca2b23d0ba	6650	int ret = MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE;
marcozecchini	0:9fca2b23d0ba	6651
marcozecchini	0:9fca2b23d0ba	6652	if( ssl == NULL \|\| ssl->conf == NULL )
marcozecchini	0:9fca2b23d0ba	6653	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
marcozecchini	0:9fca2b23d0ba	6654
marcozecchini	0:9fca2b23d0ba	6655	#if defined(MBEDTLS_SSL_SRV_C)
marcozecchini	0:9fca2b23d0ba	6656	/* On server, just send the request */
marcozecchini	0:9fca2b23d0ba	6657	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER )
marcozecchini	0:9fca2b23d0ba	6658	{
marcozecchini	0:9fca2b23d0ba	6659	if( ssl->state != MBEDTLS_SSL_HANDSHAKE_OVER )
marcozecchini	0:9fca2b23d0ba	6660	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
marcozecchini	0:9fca2b23d0ba	6661
marcozecchini	0:9fca2b23d0ba	6662	ssl->renego_status = MBEDTLS_SSL_RENEGOTIATION_PENDING;
marcozecchini	0:9fca2b23d0ba	6663
marcozecchini	0:9fca2b23d0ba	6664	/* Did we already try/start sending HelloRequest? */
marcozecchini	0:9fca2b23d0ba	6665	if( ssl->out_left != 0 )
marcozecchini	0:9fca2b23d0ba	6666	return( mbedtls_ssl_flush_output( ssl ) );
marcozecchini	0:9fca2b23d0ba	6667
marcozecchini	0:9fca2b23d0ba	6668	return( ssl_write_hello_request( ssl ) );
marcozecchini	0:9fca2b23d0ba	6669	}
marcozecchini	0:9fca2b23d0ba	6670	#endif /* MBEDTLS_SSL_SRV_C */
marcozecchini	0:9fca2b23d0ba	6671
marcozecchini	0:9fca2b23d0ba	6672	#if defined(MBEDTLS_SSL_CLI_C)
marcozecchini	0:9fca2b23d0ba	6673	/*
marcozecchini	0:9fca2b23d0ba	6674	* On client, either start the renegotiation process or,
marcozecchini	0:9fca2b23d0ba	6675	* if already in progress, continue the handshake
marcozecchini	0:9fca2b23d0ba	6676	*/
marcozecchini	0:9fca2b23d0ba	6677	if( ssl->renego_status != MBEDTLS_SSL_RENEGOTIATION_IN_PROGRESS )
marcozecchini	0:9fca2b23d0ba	6678	{
marcozecchini	0:9fca2b23d0ba	6679	if( ssl->state != MBEDTLS_SSL_HANDSHAKE_OVER )
marcozecchini	0:9fca2b23d0ba	6680	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
marcozecchini	0:9fca2b23d0ba	6681
marcozecchini	0:9fca2b23d0ba	6682	if( ( ret = ssl_start_renegotiation( ssl ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	6683	{
marcozecchini	0:9fca2b23d0ba	6684	MBEDTLS_SSL_DEBUG_RET( 1, "ssl_start_renegotiation", ret );
marcozecchini	0:9fca2b23d0ba	6685	return( ret );
marcozecchini	0:9fca2b23d0ba	6686	}
marcozecchini	0:9fca2b23d0ba	6687	}
marcozecchini	0:9fca2b23d0ba	6688	else
marcozecchini	0:9fca2b23d0ba	6689	{
marcozecchini	0:9fca2b23d0ba	6690	if( ( ret = mbedtls_ssl_handshake( ssl ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	6691	{
marcozecchini	0:9fca2b23d0ba	6692	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_handshake", ret );
marcozecchini	0:9fca2b23d0ba	6693	return( ret );
marcozecchini	0:9fca2b23d0ba	6694	}
marcozecchini	0:9fca2b23d0ba	6695	}
marcozecchini	0:9fca2b23d0ba	6696	#endif /* MBEDTLS_SSL_CLI_C */
marcozecchini	0:9fca2b23d0ba	6697
marcozecchini	0:9fca2b23d0ba	6698	return( ret );
marcozecchini	0:9fca2b23d0ba	6699	}
marcozecchini	0:9fca2b23d0ba	6700
marcozecchini	0:9fca2b23d0ba	6701	/*
marcozecchini	0:9fca2b23d0ba	6702	* Check record counters and renegotiate if they're above the limit.
marcozecchini	0:9fca2b23d0ba	6703	*/
marcozecchini	0:9fca2b23d0ba	6704	static int ssl_check_ctr_renegotiate( mbedtls_ssl_context *ssl )
marcozecchini	0:9fca2b23d0ba	6705	{
marcozecchini	0:9fca2b23d0ba	6706	size_t ep_len = ssl_ep_len( ssl );
marcozecchini	0:9fca2b23d0ba	6707	int in_ctr_cmp;
marcozecchini	0:9fca2b23d0ba	6708	int out_ctr_cmp;
marcozecchini	0:9fca2b23d0ba	6709
marcozecchini	0:9fca2b23d0ba	6710	if( ssl->state != MBEDTLS_SSL_HANDSHAKE_OVER \|\|
marcozecchini	0:9fca2b23d0ba	6711	ssl->renego_status == MBEDTLS_SSL_RENEGOTIATION_PENDING \|\|
marcozecchini	0:9fca2b23d0ba	6712	ssl->conf->disable_renegotiation == MBEDTLS_SSL_RENEGOTIATION_DISABLED )
marcozecchini	0:9fca2b23d0ba	6713	{
marcozecchini	0:9fca2b23d0ba	6714	return( 0 );
marcozecchini	0:9fca2b23d0ba	6715	}
marcozecchini	0:9fca2b23d0ba	6716
marcozecchini	0:9fca2b23d0ba	6717	in_ctr_cmp = memcmp( ssl->in_ctr + ep_len,
marcozecchini	0:9fca2b23d0ba	6718	ssl->conf->renego_period + ep_len, 8 - ep_len );
marcozecchini	0:9fca2b23d0ba	6719	out_ctr_cmp = memcmp( ssl->out_ctr + ep_len,
marcozecchini	0:9fca2b23d0ba	6720	ssl->conf->renego_period + ep_len, 8 - ep_len );
marcozecchini	0:9fca2b23d0ba	6721
marcozecchini	0:9fca2b23d0ba	6722	if( in_ctr_cmp <= 0 && out_ctr_cmp <= 0 )
marcozecchini	0:9fca2b23d0ba	6723	{
marcozecchini	0:9fca2b23d0ba	6724	return( 0 );
marcozecchini	0:9fca2b23d0ba	6725	}
marcozecchini	0:9fca2b23d0ba	6726
marcozecchini	0:9fca2b23d0ba	6727	MBEDTLS_SSL_DEBUG_MSG( 1, ( "record counter limit reached: renegotiate" ) );
marcozecchini	0:9fca2b23d0ba	6728	return( mbedtls_ssl_renegotiate( ssl ) );
marcozecchini	0:9fca2b23d0ba	6729	}
marcozecchini	0:9fca2b23d0ba	6730	#endif /* MBEDTLS_SSL_RENEGOTIATION */
marcozecchini	0:9fca2b23d0ba	6731
marcozecchini	0:9fca2b23d0ba	6732	/*
marcozecchini	0:9fca2b23d0ba	6733	* Receive application data decrypted from the SSL layer
marcozecchini	0:9fca2b23d0ba	6734	*/
marcozecchini	0:9fca2b23d0ba	6735	int mbedtls_ssl_read( mbedtls_ssl_context ssl, unsigned char buf, size_t len )
marcozecchini	0:9fca2b23d0ba	6736	{
marcozecchini	0:9fca2b23d0ba	6737	int ret;
marcozecchini	0:9fca2b23d0ba	6738	size_t n;
marcozecchini	0:9fca2b23d0ba	6739
marcozecchini	0:9fca2b23d0ba	6740	if( ssl == NULL \|\| ssl->conf == NULL )
marcozecchini	0:9fca2b23d0ba	6741	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
marcozecchini	0:9fca2b23d0ba	6742
marcozecchini	0:9fca2b23d0ba	6743	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> read" ) );
marcozecchini	0:9fca2b23d0ba	6744
marcozecchini	0:9fca2b23d0ba	6745	#if defined(MBEDTLS_SSL_PROTO_DTLS)
marcozecchini	0:9fca2b23d0ba	6746	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
marcozecchini	0:9fca2b23d0ba	6747	{
marcozecchini	0:9fca2b23d0ba	6748	if( ( ret = mbedtls_ssl_flush_output( ssl ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	6749	return( ret );
marcozecchini	0:9fca2b23d0ba	6750
marcozecchini	0:9fca2b23d0ba	6751	if( ssl->handshake != NULL &&
marcozecchini	0:9fca2b23d0ba	6752	ssl->handshake->retransmit_state == MBEDTLS_SSL_RETRANS_SENDING )
marcozecchini	0:9fca2b23d0ba	6753	{
marcozecchini	0:9fca2b23d0ba	6754	if( ( ret = mbedtls_ssl_resend( ssl ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	6755	return( ret );
marcozecchini	0:9fca2b23d0ba	6756	}
marcozecchini	0:9fca2b23d0ba	6757	}
marcozecchini	0:9fca2b23d0ba	6758	#endif
marcozecchini	0:9fca2b23d0ba	6759
marcozecchini	0:9fca2b23d0ba	6760	/*
marcozecchini	0:9fca2b23d0ba	6761	* Check if renegotiation is necessary and/or handshake is
marcozecchini	0:9fca2b23d0ba	6762	* in process. If yes, perform/continue, and fall through
marcozecchini	0:9fca2b23d0ba	6763	* if an unexpected packet is received while the client
marcozecchini	0:9fca2b23d0ba	6764	* is waiting for the ServerHello.
marcozecchini	0:9fca2b23d0ba	6765	*
marcozecchini	0:9fca2b23d0ba	6766	* (There is no equivalent to the last condition on
marcozecchini	0:9fca2b23d0ba	6767	* the server-side as it is not treated as within
marcozecchini	0:9fca2b23d0ba	6768	* a handshake while waiting for the ClientHello
marcozecchini	0:9fca2b23d0ba	6769	* after a renegotiation request.)
marcozecchini	0:9fca2b23d0ba	6770	*/
marcozecchini	0:9fca2b23d0ba	6771
marcozecchini	0:9fca2b23d0ba	6772	#if defined(MBEDTLS_SSL_RENEGOTIATION)
marcozecchini	0:9fca2b23d0ba	6773	ret = ssl_check_ctr_renegotiate( ssl );
marcozecchini	0:9fca2b23d0ba	6774	if( ret != MBEDTLS_ERR_SSL_WAITING_SERVER_HELLO_RENEGO &&
marcozecchini	0:9fca2b23d0ba	6775	ret != 0 )
marcozecchini	0:9fca2b23d0ba	6776	{
marcozecchini	0:9fca2b23d0ba	6777	MBEDTLS_SSL_DEBUG_RET( 1, "ssl_check_ctr_renegotiate", ret );
marcozecchini	0:9fca2b23d0ba	6778	return( ret );
marcozecchini	0:9fca2b23d0ba	6779	}
marcozecchini	0:9fca2b23d0ba	6780	#endif
marcozecchini	0:9fca2b23d0ba	6781
marcozecchini	0:9fca2b23d0ba	6782	if( ssl->state != MBEDTLS_SSL_HANDSHAKE_OVER )
marcozecchini	0:9fca2b23d0ba	6783	{
marcozecchini	0:9fca2b23d0ba	6784	ret = mbedtls_ssl_handshake( ssl );
marcozecchini	0:9fca2b23d0ba	6785	if( ret != MBEDTLS_ERR_SSL_WAITING_SERVER_HELLO_RENEGO &&
marcozecchini	0:9fca2b23d0ba	6786	ret != 0 )
marcozecchini	0:9fca2b23d0ba	6787	{
marcozecchini	0:9fca2b23d0ba	6788	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_handshake", ret );
marcozecchini	0:9fca2b23d0ba	6789	return( ret );
marcozecchini	0:9fca2b23d0ba	6790	}
marcozecchini	0:9fca2b23d0ba	6791	}
marcozecchini	0:9fca2b23d0ba	6792
marcozecchini	0:9fca2b23d0ba	6793	/*
marcozecchini	0:9fca2b23d0ba	6794	* TODO
marcozecchini	0:9fca2b23d0ba	6795	*
marcozecchini	0:9fca2b23d0ba	6796	* The logic should be streamlined here:
marcozecchini	0:9fca2b23d0ba	6797	*
marcozecchini	0:9fca2b23d0ba	6798	* Instead of
marcozecchini	0:9fca2b23d0ba	6799	*
marcozecchini	0:9fca2b23d0ba	6800	* - Manually checking whether ssl->in_offt is NULL
marcozecchini	0:9fca2b23d0ba	6801	* - Fetching a new record if yes
marcozecchini	0:9fca2b23d0ba	6802	* - Setting ssl->in_offt if one finds an application record
marcozecchini	0:9fca2b23d0ba	6803	* - Resetting keep_current_message after handling the application data
marcozecchini	0:9fca2b23d0ba	6804	*
marcozecchini	0:9fca2b23d0ba	6805	* one should
marcozecchini	0:9fca2b23d0ba	6806	*
marcozecchini	0:9fca2b23d0ba	6807	* - Adapt read_record to set ssl->in_offt automatically
marcozecchini	0:9fca2b23d0ba	6808	* when a new application data record is processed.
marcozecchini	0:9fca2b23d0ba	6809	* - Always call mbedtls_ssl_read_record here.
marcozecchini	0:9fca2b23d0ba	6810	*
marcozecchini	0:9fca2b23d0ba	6811	* This way, the logic of ssl_read would be much clearer:
marcozecchini	0:9fca2b23d0ba	6812	*
marcozecchini	0:9fca2b23d0ba	6813	* (1) Always call record layer and see what kind of record is on
marcozecchini	0:9fca2b23d0ba	6814	* and have it ready for consumption (in particular, in_offt
marcozecchini	0:9fca2b23d0ba	6815	* properly set for application data records).
marcozecchini	0:9fca2b23d0ba	6816	* (2) If it's application data (either freshly fetched
marcozecchini	0:9fca2b23d0ba	6817	* or something already being partially processed),
marcozecchini	0:9fca2b23d0ba	6818	* serve the read request from it.
marcozecchini	0:9fca2b23d0ba	6819	* (3) If it's something different from application data,
marcozecchini	0:9fca2b23d0ba	6820	* handle it accordingly, e.g. potentially start a
marcozecchini	0:9fca2b23d0ba	6821	* renegotiation.
marcozecchini	0:9fca2b23d0ba	6822	*
marcozecchini	0:9fca2b23d0ba	6823	* This will also remove the need to manually reset
marcozecchini	0:9fca2b23d0ba	6824	* ssl->keep_current_message = 0 below.
marcozecchini	0:9fca2b23d0ba	6825	*
marcozecchini	0:9fca2b23d0ba	6826	*/
marcozecchini	0:9fca2b23d0ba	6827
marcozecchini	0:9fca2b23d0ba	6828	if( ssl->in_offt == NULL )
marcozecchini	0:9fca2b23d0ba	6829	{
marcozecchini	0:9fca2b23d0ba	6830	/* Start timer if not already running */
marcozecchini	0:9fca2b23d0ba	6831	if( ssl->f_get_timer != NULL &&
marcozecchini	0:9fca2b23d0ba	6832	ssl->f_get_timer( ssl->p_timer ) == -1 )
marcozecchini	0:9fca2b23d0ba	6833	{
marcozecchini	0:9fca2b23d0ba	6834	ssl_set_timer( ssl, ssl->conf->read_timeout );
marcozecchini	0:9fca2b23d0ba	6835	}
marcozecchini	0:9fca2b23d0ba	6836
marcozecchini	0:9fca2b23d0ba	6837	if( ( ret = mbedtls_ssl_read_record( ssl ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	6838	{
marcozecchini	0:9fca2b23d0ba	6839	if( ret == MBEDTLS_ERR_SSL_CONN_EOF )
marcozecchini	0:9fca2b23d0ba	6840	return( 0 );
marcozecchini	0:9fca2b23d0ba	6841
marcozecchini	0:9fca2b23d0ba	6842	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_read_record", ret );
marcozecchini	0:9fca2b23d0ba	6843	return( ret );
marcozecchini	0:9fca2b23d0ba	6844	}
marcozecchini	0:9fca2b23d0ba	6845
marcozecchini	0:9fca2b23d0ba	6846	if( ssl->in_msglen == 0 &&
marcozecchini	0:9fca2b23d0ba	6847	ssl->in_msgtype == MBEDTLS_SSL_MSG_APPLICATION_DATA )
marcozecchini	0:9fca2b23d0ba	6848	{
marcozecchini	0:9fca2b23d0ba	6849	/*
marcozecchini	0:9fca2b23d0ba	6850	* OpenSSL sends empty messages to randomize the IV
marcozecchini	0:9fca2b23d0ba	6851	*/
marcozecchini	0:9fca2b23d0ba	6852	if( ( ret = mbedtls_ssl_read_record( ssl ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	6853	{
marcozecchini	0:9fca2b23d0ba	6854	if( ret == MBEDTLS_ERR_SSL_CONN_EOF )
marcozecchini	0:9fca2b23d0ba	6855	return( 0 );
marcozecchini	0:9fca2b23d0ba	6856
marcozecchini	0:9fca2b23d0ba	6857	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_read_record", ret );
marcozecchini	0:9fca2b23d0ba	6858	return( ret );
marcozecchini	0:9fca2b23d0ba	6859	}
marcozecchini	0:9fca2b23d0ba	6860	}
marcozecchini	0:9fca2b23d0ba	6861
marcozecchini	0:9fca2b23d0ba	6862	#if defined(MBEDTLS_SSL_RENEGOTIATION)
marcozecchini	0:9fca2b23d0ba	6863	if( ssl->in_msgtype == MBEDTLS_SSL_MSG_HANDSHAKE )
marcozecchini	0:9fca2b23d0ba	6864	{
marcozecchini	0:9fca2b23d0ba	6865	MBEDTLS_SSL_DEBUG_MSG( 1, ( "received handshake message" ) );
marcozecchini	0:9fca2b23d0ba	6866
marcozecchini	0:9fca2b23d0ba	6867	/*
marcozecchini	0:9fca2b23d0ba	6868	* - For client-side, expect SERVER_HELLO_REQUEST.
marcozecchini	0:9fca2b23d0ba	6869	* - For server-side, expect CLIENT_HELLO.
marcozecchini	0:9fca2b23d0ba	6870	* - Fail (TLS) or silently drop record (DTLS) in other cases.
marcozecchini	0:9fca2b23d0ba	6871	*/
marcozecchini	0:9fca2b23d0ba	6872
marcozecchini	0:9fca2b23d0ba	6873	#if defined(MBEDTLS_SSL_CLI_C)
marcozecchini	0:9fca2b23d0ba	6874	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_CLIENT &&
marcozecchini	0:9fca2b23d0ba	6875	( ssl->in_msg[0] != MBEDTLS_SSL_HS_HELLO_REQUEST \|\|
marcozecchini	0:9fca2b23d0ba	6876	ssl->in_hslen != mbedtls_ssl_hs_hdr_len( ssl ) ) )
marcozecchini	0:9fca2b23d0ba	6877	{
marcozecchini	0:9fca2b23d0ba	6878	MBEDTLS_SSL_DEBUG_MSG( 1, ( "handshake received (not HelloRequest)" ) );
marcozecchini	0:9fca2b23d0ba	6879
marcozecchini	0:9fca2b23d0ba	6880	/* With DTLS, drop the packet (probably from last handshake) */
marcozecchini	0:9fca2b23d0ba	6881	#if defined(MBEDTLS_SSL_PROTO_DTLS)
marcozecchini	0:9fca2b23d0ba	6882	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
marcozecchini	0:9fca2b23d0ba	6883	return( MBEDTLS_ERR_SSL_WANT_READ );
marcozecchini	0:9fca2b23d0ba	6884	#endif
marcozecchini	0:9fca2b23d0ba	6885	return( MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE );
marcozecchini	0:9fca2b23d0ba	6886	}
marcozecchini	0:9fca2b23d0ba	6887	#endif /* MBEDTLS_SSL_CLI_C */
marcozecchini	0:9fca2b23d0ba	6888
marcozecchini	0:9fca2b23d0ba	6889	#if defined(MBEDTLS_SSL_SRV_C)
marcozecchini	0:9fca2b23d0ba	6890	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER &&
marcozecchini	0:9fca2b23d0ba	6891	ssl->in_msg[0] != MBEDTLS_SSL_HS_CLIENT_HELLO )
marcozecchini	0:9fca2b23d0ba	6892	{
marcozecchini	0:9fca2b23d0ba	6893	MBEDTLS_SSL_DEBUG_MSG( 1, ( "handshake received (not ClientHello)" ) );
marcozecchini	0:9fca2b23d0ba	6894
marcozecchini	0:9fca2b23d0ba	6895	/* With DTLS, drop the packet (probably from last handshake) */
marcozecchini	0:9fca2b23d0ba	6896	#if defined(MBEDTLS_SSL_PROTO_DTLS)
marcozecchini	0:9fca2b23d0ba	6897	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
marcozecchini	0:9fca2b23d0ba	6898	return( MBEDTLS_ERR_SSL_WANT_READ );
marcozecchini	0:9fca2b23d0ba	6899	#endif
marcozecchini	0:9fca2b23d0ba	6900	return( MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE );
marcozecchini	0:9fca2b23d0ba	6901	}
marcozecchini	0:9fca2b23d0ba	6902	#endif /* MBEDTLS_SSL_SRV_C */
marcozecchini	0:9fca2b23d0ba	6903
marcozecchini	0:9fca2b23d0ba	6904	/* Determine whether renegotiation attempt should be accepted */
marcozecchini	0:9fca2b23d0ba	6905
marcozecchini	0:9fca2b23d0ba	6906	if( ssl->conf->disable_renegotiation == MBEDTLS_SSL_RENEGOTIATION_DISABLED \|\|
marcozecchini	0:9fca2b23d0ba	6907	( ssl->secure_renegotiation == MBEDTLS_SSL_LEGACY_RENEGOTIATION &&
marcozecchini	0:9fca2b23d0ba	6908	ssl->conf->allow_legacy_renegotiation ==
marcozecchini	0:9fca2b23d0ba	6909	MBEDTLS_SSL_LEGACY_NO_RENEGOTIATION ) )
marcozecchini	0:9fca2b23d0ba	6910	{
marcozecchini	0:9fca2b23d0ba	6911	/*
marcozecchini	0:9fca2b23d0ba	6912	* Refuse renegotiation
marcozecchini	0:9fca2b23d0ba	6913	*/
marcozecchini	0:9fca2b23d0ba	6914
marcozecchini	0:9fca2b23d0ba	6915	MBEDTLS_SSL_DEBUG_MSG( 3, ( "refusing renegotiation, sending alert" ) );
marcozecchini	0:9fca2b23d0ba	6916
marcozecchini	0:9fca2b23d0ba	6917	#if defined(MBEDTLS_SSL_PROTO_SSL3)
marcozecchini	0:9fca2b23d0ba	6918	if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 )
marcozecchini	0:9fca2b23d0ba	6919	{
marcozecchini	0:9fca2b23d0ba	6920	/* SSLv3 does not have a "no_renegotiation" warning, so
marcozecchini	0:9fca2b23d0ba	6921	we send a fatal alert and abort the connection. */
marcozecchini	0:9fca2b23d0ba	6922	mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
marcozecchini	0:9fca2b23d0ba	6923	MBEDTLS_SSL_ALERT_MSG_UNEXPECTED_MESSAGE );
marcozecchini	0:9fca2b23d0ba	6924	return( MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE );
marcozecchini	0:9fca2b23d0ba	6925	}
marcozecchini	0:9fca2b23d0ba	6926	else
marcozecchini	0:9fca2b23d0ba	6927	#endif /* MBEDTLS_SSL_PROTO_SSL3 */
marcozecchini	0:9fca2b23d0ba	6928	#if defined(MBEDTLS_SSL_PROTO_TLS1) \|\| defined(MBEDTLS_SSL_PROTO_TLS1_1) \|\| \
marcozecchini	0:9fca2b23d0ba	6929	defined(MBEDTLS_SSL_PROTO_TLS1_2)
marcozecchini	0:9fca2b23d0ba	6930	if( ssl->minor_ver >= MBEDTLS_SSL_MINOR_VERSION_1 )
marcozecchini	0:9fca2b23d0ba	6931	{
marcozecchini	0:9fca2b23d0ba	6932	if( ( ret = mbedtls_ssl_send_alert_message( ssl,
marcozecchini	0:9fca2b23d0ba	6933	MBEDTLS_SSL_ALERT_LEVEL_WARNING,
marcozecchini	0:9fca2b23d0ba	6934	MBEDTLS_SSL_ALERT_MSG_NO_RENEGOTIATION ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	6935	{
marcozecchini	0:9fca2b23d0ba	6936	return( ret );
marcozecchini	0:9fca2b23d0ba	6937	}
marcozecchini	0:9fca2b23d0ba	6938	}
marcozecchini	0:9fca2b23d0ba	6939	else
marcozecchini	0:9fca2b23d0ba	6940	#endif /* MBEDTLS_SSL_PROTO_TLS1 \|\| MBEDTLS_SSL_PROTO_TLS1_1 \|\|
marcozecchini	0:9fca2b23d0ba	6941	MBEDTLS_SSL_PROTO_TLS1_2 */
marcozecchini	0:9fca2b23d0ba	6942	{
marcozecchini	0:9fca2b23d0ba	6943	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
marcozecchini	0:9fca2b23d0ba	6944	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
marcozecchini	0:9fca2b23d0ba	6945	}
marcozecchini	0:9fca2b23d0ba	6946	}
marcozecchini	0:9fca2b23d0ba	6947	else
marcozecchini	0:9fca2b23d0ba	6948	{
marcozecchini	0:9fca2b23d0ba	6949	/*
marcozecchini	0:9fca2b23d0ba	6950	* Accept renegotiation request
marcozecchini	0:9fca2b23d0ba	6951	*/
marcozecchini	0:9fca2b23d0ba	6952
marcozecchini	0:9fca2b23d0ba	6953	/* DTLS clients need to know renego is server-initiated */
marcozecchini	0:9fca2b23d0ba	6954	#if defined(MBEDTLS_SSL_PROTO_DTLS)
marcozecchini	0:9fca2b23d0ba	6955	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM &&
marcozecchini	0:9fca2b23d0ba	6956	ssl->conf->endpoint == MBEDTLS_SSL_IS_CLIENT )
marcozecchini	0:9fca2b23d0ba	6957	{
marcozecchini	0:9fca2b23d0ba	6958	ssl->renego_status = MBEDTLS_SSL_RENEGOTIATION_PENDING;
marcozecchini	0:9fca2b23d0ba	6959	}
marcozecchini	0:9fca2b23d0ba	6960	#endif
marcozecchini	0:9fca2b23d0ba	6961	ret = ssl_start_renegotiation( ssl );
marcozecchini	0:9fca2b23d0ba	6962	if( ret != MBEDTLS_ERR_SSL_WAITING_SERVER_HELLO_RENEGO &&
marcozecchini	0:9fca2b23d0ba	6963	ret != 0 )
marcozecchini	0:9fca2b23d0ba	6964	{
marcozecchini	0:9fca2b23d0ba	6965	MBEDTLS_SSL_DEBUG_RET( 1, "ssl_start_renegotiation", ret );
marcozecchini	0:9fca2b23d0ba	6966	return( ret );
marcozecchini	0:9fca2b23d0ba	6967	}
marcozecchini	0:9fca2b23d0ba	6968	}
marcozecchini	0:9fca2b23d0ba	6969
marcozecchini	0:9fca2b23d0ba	6970	return( MBEDTLS_ERR_SSL_WANT_READ );
marcozecchini	0:9fca2b23d0ba	6971	}
marcozecchini	0:9fca2b23d0ba	6972	else if( ssl->renego_status == MBEDTLS_SSL_RENEGOTIATION_PENDING )
marcozecchini	0:9fca2b23d0ba	6973	{
marcozecchini	0:9fca2b23d0ba	6974	if( ssl->conf->renego_max_records >= 0 )
marcozecchini	0:9fca2b23d0ba	6975	{
marcozecchini	0:9fca2b23d0ba	6976	if( ++ssl->renego_records_seen > ssl->conf->renego_max_records )
marcozecchini	0:9fca2b23d0ba	6977	{
marcozecchini	0:9fca2b23d0ba	6978	MBEDTLS_SSL_DEBUG_MSG( 1, ( "renegotiation requested, "
marcozecchini	0:9fca2b23d0ba	6979	"but not honored by client" ) );
marcozecchini	0:9fca2b23d0ba	6980	return( MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE );
marcozecchini	0:9fca2b23d0ba	6981	}
marcozecchini	0:9fca2b23d0ba	6982	}
marcozecchini	0:9fca2b23d0ba	6983	}
marcozecchini	0:9fca2b23d0ba	6984	#endif /* MBEDTLS_SSL_RENEGOTIATION */
marcozecchini	0:9fca2b23d0ba	6985
marcozecchini	0:9fca2b23d0ba	6986	/* Fatal and closure alerts handled by mbedtls_ssl_read_record() */
marcozecchini	0:9fca2b23d0ba	6987	if( ssl->in_msgtype == MBEDTLS_SSL_MSG_ALERT )
marcozecchini	0:9fca2b23d0ba	6988	{
marcozecchini	0:9fca2b23d0ba	6989	MBEDTLS_SSL_DEBUG_MSG( 2, ( "ignoring non-fatal non-closure alert" ) );
marcozecchini	0:9fca2b23d0ba	6990	return( MBEDTLS_ERR_SSL_WANT_READ );
marcozecchini	0:9fca2b23d0ba	6991	}
marcozecchini	0:9fca2b23d0ba	6992
marcozecchini	0:9fca2b23d0ba	6993	if( ssl->in_msgtype != MBEDTLS_SSL_MSG_APPLICATION_DATA )
marcozecchini	0:9fca2b23d0ba	6994	{
marcozecchini	0:9fca2b23d0ba	6995	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad application data message" ) );
marcozecchini	0:9fca2b23d0ba	6996	return( MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE );
marcozecchini	0:9fca2b23d0ba	6997	}
marcozecchini	0:9fca2b23d0ba	6998
marcozecchini	0:9fca2b23d0ba	6999	ssl->in_offt = ssl->in_msg;
marcozecchini	0:9fca2b23d0ba	7000
marcozecchini	0:9fca2b23d0ba	7001	/* We're going to return something now, cancel timer,
marcozecchini	0:9fca2b23d0ba	7002	* except if handshake (renegotiation) is in progress */
marcozecchini	0:9fca2b23d0ba	7003	if( ssl->state == MBEDTLS_SSL_HANDSHAKE_OVER )
marcozecchini	0:9fca2b23d0ba	7004	ssl_set_timer( ssl, 0 );
marcozecchini	0:9fca2b23d0ba	7005
marcozecchini	0:9fca2b23d0ba	7006	#if defined(MBEDTLS_SSL_PROTO_DTLS)
marcozecchini	0:9fca2b23d0ba	7007	/* If we requested renego but received AppData, resend HelloRequest.
marcozecchini	0:9fca2b23d0ba	7008	* Do it now, after setting in_offt, to avoid taking this branch
marcozecchini	0:9fca2b23d0ba	7009	* again if ssl_write_hello_request() returns WANT_WRITE */
marcozecchini	0:9fca2b23d0ba	7010	#if defined(MBEDTLS_SSL_SRV_C) && defined(MBEDTLS_SSL_RENEGOTIATION)
marcozecchini	0:9fca2b23d0ba	7011	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER &&
marcozecchini	0:9fca2b23d0ba	7012	ssl->renego_status == MBEDTLS_SSL_RENEGOTIATION_PENDING )
marcozecchini	0:9fca2b23d0ba	7013	{
marcozecchini	0:9fca2b23d0ba	7014	if( ( ret = ssl_resend_hello_request( ssl ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	7015	{
marcozecchini	0:9fca2b23d0ba	7016	MBEDTLS_SSL_DEBUG_RET( 1, "ssl_resend_hello_request", ret );
marcozecchini	0:9fca2b23d0ba	7017	return( ret );
marcozecchini	0:9fca2b23d0ba	7018	}
marcozecchini	0:9fca2b23d0ba	7019	}
marcozecchini	0:9fca2b23d0ba	7020	#endif /* MBEDTLS_SSL_SRV_C && MBEDTLS_SSL_RENEGOTIATION */
marcozecchini	0:9fca2b23d0ba	7021	#endif /* MBEDTLS_SSL_PROTO_DTLS */
marcozecchini	0:9fca2b23d0ba	7022	}
marcozecchini	0:9fca2b23d0ba	7023
marcozecchini	0:9fca2b23d0ba	7024	n = ( len < ssl->in_msglen )
marcozecchini	0:9fca2b23d0ba	7025	? len : ssl->in_msglen;
marcozecchini	0:9fca2b23d0ba	7026
marcozecchini	0:9fca2b23d0ba	7027	memcpy( buf, ssl->in_offt, n );
marcozecchini	0:9fca2b23d0ba	7028	ssl->in_msglen -= n;
marcozecchini	0:9fca2b23d0ba	7029
marcozecchini	0:9fca2b23d0ba	7030	if( ssl->in_msglen == 0 )
marcozecchini	0:9fca2b23d0ba	7031	{
marcozecchini	0:9fca2b23d0ba	7032	/* all bytes consumed */
marcozecchini	0:9fca2b23d0ba	7033	ssl->in_offt = NULL;
marcozecchini	0:9fca2b23d0ba	7034	ssl->keep_current_message = 0;
marcozecchini	0:9fca2b23d0ba	7035	}
marcozecchini	0:9fca2b23d0ba	7036	else
marcozecchini	0:9fca2b23d0ba	7037	{
marcozecchini	0:9fca2b23d0ba	7038	/* more data available */
marcozecchini	0:9fca2b23d0ba	7039	ssl->in_offt += n;
marcozecchini	0:9fca2b23d0ba	7040	}
marcozecchini	0:9fca2b23d0ba	7041
marcozecchini	0:9fca2b23d0ba	7042	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= read" ) );
marcozecchini	0:9fca2b23d0ba	7043
marcozecchini	0:9fca2b23d0ba	7044	return( (int) n );
marcozecchini	0:9fca2b23d0ba	7045	}
marcozecchini	0:9fca2b23d0ba	7046
marcozecchini	0:9fca2b23d0ba	7047	/*
marcozecchini	0:9fca2b23d0ba	7048	* Send application data to be encrypted by the SSL layer,
marcozecchini	0:9fca2b23d0ba	7049	* taking care of max fragment length and buffer size
marcozecchini	0:9fca2b23d0ba	7050	*/
marcozecchini	0:9fca2b23d0ba	7051	static int ssl_write_real( mbedtls_ssl_context *ssl,
marcozecchini	0:9fca2b23d0ba	7052	const unsigned char *buf, size_t len )
marcozecchini	0:9fca2b23d0ba	7053	{
marcozecchini	0:9fca2b23d0ba	7054	int ret;
marcozecchini	0:9fca2b23d0ba	7055	#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
marcozecchini	0:9fca2b23d0ba	7056	size_t max_len = mbedtls_ssl_get_max_frag_len( ssl );
marcozecchini	0:9fca2b23d0ba	7057
marcozecchini	0:9fca2b23d0ba	7058	if( len > max_len )
marcozecchini	0:9fca2b23d0ba	7059	{
marcozecchini	0:9fca2b23d0ba	7060	#if defined(MBEDTLS_SSL_PROTO_DTLS)
marcozecchini	0:9fca2b23d0ba	7061	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
marcozecchini	0:9fca2b23d0ba	7062	{
marcozecchini	0:9fca2b23d0ba	7063	MBEDTLS_SSL_DEBUG_MSG( 1, ( "fragment larger than the (negotiated) "
marcozecchini	0:9fca2b23d0ba	7064	"maximum fragment length: %d > %d",
marcozecchini	0:9fca2b23d0ba	7065	len, max_len ) );
marcozecchini	0:9fca2b23d0ba	7066	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
marcozecchini	0:9fca2b23d0ba	7067	}
marcozecchini	0:9fca2b23d0ba	7068	else
marcozecchini	0:9fca2b23d0ba	7069	#endif
marcozecchini	0:9fca2b23d0ba	7070	len = max_len;
marcozecchini	0:9fca2b23d0ba	7071	}
marcozecchini	0:9fca2b23d0ba	7072	#endif /* MBEDTLS_SSL_MAX_FRAGMENT_LENGTH */
marcozecchini	0:9fca2b23d0ba	7073
marcozecchini	0:9fca2b23d0ba	7074	if( ssl->out_left != 0 )
marcozecchini	0:9fca2b23d0ba	7075	{
marcozecchini	0:9fca2b23d0ba	7076	if( ( ret = mbedtls_ssl_flush_output( ssl ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	7077	{
marcozecchini	0:9fca2b23d0ba	7078	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_flush_output", ret );
marcozecchini	0:9fca2b23d0ba	7079	return( ret );
marcozecchini	0:9fca2b23d0ba	7080	}
marcozecchini	0:9fca2b23d0ba	7081	}
marcozecchini	0:9fca2b23d0ba	7082	else
marcozecchini	0:9fca2b23d0ba	7083	{
marcozecchini	0:9fca2b23d0ba	7084	ssl->out_msglen = len;
marcozecchini	0:9fca2b23d0ba	7085	ssl->out_msgtype = MBEDTLS_SSL_MSG_APPLICATION_DATA;
marcozecchini	0:9fca2b23d0ba	7086	memcpy( ssl->out_msg, buf, len );
marcozecchini	0:9fca2b23d0ba	7087
marcozecchini	0:9fca2b23d0ba	7088	if( ( ret = mbedtls_ssl_write_record( ssl ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	7089	{
marcozecchini	0:9fca2b23d0ba	7090	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_write_record", ret );
marcozecchini	0:9fca2b23d0ba	7091	return( ret );
marcozecchini	0:9fca2b23d0ba	7092	}
marcozecchini	0:9fca2b23d0ba	7093	}
marcozecchini	0:9fca2b23d0ba	7094
marcozecchini	0:9fca2b23d0ba	7095	return( (int) len );
marcozecchini	0:9fca2b23d0ba	7096	}
marcozecchini	0:9fca2b23d0ba	7097
marcozecchini	0:9fca2b23d0ba	7098	/*
marcozecchini	0:9fca2b23d0ba	7099	* Write application data, doing 1/n-1 splitting if necessary.
marcozecchini	0:9fca2b23d0ba	7100	*
marcozecchini	0:9fca2b23d0ba	7101	* With non-blocking I/O, ssl_write_real() may return WANT_WRITE,
marcozecchini	0:9fca2b23d0ba	7102	* then the caller will call us again with the same arguments, so
marcozecchini	0:9fca2b23d0ba	7103	* remember wether we already did the split or not.
marcozecchini	0:9fca2b23d0ba	7104	*/
marcozecchini	0:9fca2b23d0ba	7105	#if defined(MBEDTLS_SSL_CBC_RECORD_SPLITTING)
marcozecchini	0:9fca2b23d0ba	7106	static int ssl_write_split( mbedtls_ssl_context *ssl,
marcozecchini	0:9fca2b23d0ba	7107	const unsigned char *buf, size_t len )
marcozecchini	0:9fca2b23d0ba	7108	{
marcozecchini	0:9fca2b23d0ba	7109	int ret;
marcozecchini	0:9fca2b23d0ba	7110
marcozecchini	0:9fca2b23d0ba	7111	if( ssl->conf->cbc_record_splitting ==
marcozecchini	0:9fca2b23d0ba	7112	MBEDTLS_SSL_CBC_RECORD_SPLITTING_DISABLED \|\|
marcozecchini	0:9fca2b23d0ba	7113	len <= 1 \|\|
marcozecchini	0:9fca2b23d0ba	7114	ssl->minor_ver > MBEDTLS_SSL_MINOR_VERSION_1 \|\|
marcozecchini	0:9fca2b23d0ba	7115	mbedtls_cipher_get_cipher_mode( &ssl->transform_out->cipher_ctx_enc )
marcozecchini	0:9fca2b23d0ba	7116	!= MBEDTLS_MODE_CBC )
marcozecchini	0:9fca2b23d0ba	7117	{
marcozecchini	0:9fca2b23d0ba	7118	return( ssl_write_real( ssl, buf, len ) );
marcozecchini	0:9fca2b23d0ba	7119	}
marcozecchini	0:9fca2b23d0ba	7120
marcozecchini	0:9fca2b23d0ba	7121	if( ssl->split_done == 0 )
marcozecchini	0:9fca2b23d0ba	7122	{
marcozecchini	0:9fca2b23d0ba	7123	if( ( ret = ssl_write_real( ssl, buf, 1 ) ) <= 0 )
marcozecchini	0:9fca2b23d0ba	7124	return( ret );
marcozecchini	0:9fca2b23d0ba	7125	ssl->split_done = 1;
marcozecchini	0:9fca2b23d0ba	7126	}
marcozecchini	0:9fca2b23d0ba	7127
marcozecchini	0:9fca2b23d0ba	7128	if( ( ret = ssl_write_real( ssl, buf + 1, len - 1 ) ) <= 0 )
marcozecchini	0:9fca2b23d0ba	7129	return( ret );
marcozecchini	0:9fca2b23d0ba	7130	ssl->split_done = 0;
marcozecchini	0:9fca2b23d0ba	7131
marcozecchini	0:9fca2b23d0ba	7132	return( ret + 1 );
marcozecchini	0:9fca2b23d0ba	7133	}
marcozecchini	0:9fca2b23d0ba	7134	#endif /* MBEDTLS_SSL_CBC_RECORD_SPLITTING */
marcozecchini	0:9fca2b23d0ba	7135
marcozecchini	0:9fca2b23d0ba	7136	/*
marcozecchini	0:9fca2b23d0ba	7137	* Write application data (public-facing wrapper)
marcozecchini	0:9fca2b23d0ba	7138	*/
marcozecchini	0:9fca2b23d0ba	7139	int mbedtls_ssl_write( mbedtls_ssl_context ssl, const unsigned char buf, size_t len )
marcozecchini	0:9fca2b23d0ba	7140	{
marcozecchini	0:9fca2b23d0ba	7141	int ret;
marcozecchini	0:9fca2b23d0ba	7142
marcozecchini	0:9fca2b23d0ba	7143	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write" ) );
marcozecchini	0:9fca2b23d0ba	7144
marcozecchini	0:9fca2b23d0ba	7145	if( ssl == NULL \|\| ssl->conf == NULL )
marcozecchini	0:9fca2b23d0ba	7146	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
marcozecchini	0:9fca2b23d0ba	7147
marcozecchini	0:9fca2b23d0ba	7148	#if defined(MBEDTLS_SSL_RENEGOTIATION)
marcozecchini	0:9fca2b23d0ba	7149	if( ( ret = ssl_check_ctr_renegotiate( ssl ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	7150	{
marcozecchini	0:9fca2b23d0ba	7151	MBEDTLS_SSL_DEBUG_RET( 1, "ssl_check_ctr_renegotiate", ret );
marcozecchini	0:9fca2b23d0ba	7152	return( ret );
marcozecchini	0:9fca2b23d0ba	7153	}
marcozecchini	0:9fca2b23d0ba	7154	#endif
marcozecchini	0:9fca2b23d0ba	7155
marcozecchini	0:9fca2b23d0ba	7156	if( ssl->state != MBEDTLS_SSL_HANDSHAKE_OVER )
marcozecchini	0:9fca2b23d0ba	7157	{
marcozecchini	0:9fca2b23d0ba	7158	if( ( ret = mbedtls_ssl_handshake( ssl ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	7159	{
marcozecchini	0:9fca2b23d0ba	7160	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_handshake", ret );
marcozecchini	0:9fca2b23d0ba	7161	return( ret );
marcozecchini	0:9fca2b23d0ba	7162	}
marcozecchini	0:9fca2b23d0ba	7163	}
marcozecchini	0:9fca2b23d0ba	7164
marcozecchini	0:9fca2b23d0ba	7165	#if defined(MBEDTLS_SSL_CBC_RECORD_SPLITTING)
marcozecchini	0:9fca2b23d0ba	7166	ret = ssl_write_split( ssl, buf, len );
marcozecchini	0:9fca2b23d0ba	7167	#else
marcozecchini	0:9fca2b23d0ba	7168	ret = ssl_write_real( ssl, buf, len );
marcozecchini	0:9fca2b23d0ba	7169	#endif
marcozecchini	0:9fca2b23d0ba	7170
marcozecchini	0:9fca2b23d0ba	7171	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= write" ) );
marcozecchini	0:9fca2b23d0ba	7172
marcozecchini	0:9fca2b23d0ba	7173	return( ret );
marcozecchini	0:9fca2b23d0ba	7174	}
marcozecchini	0:9fca2b23d0ba	7175
marcozecchini	0:9fca2b23d0ba	7176	/*
marcozecchini	0:9fca2b23d0ba	7177	* Notify the peer that the connection is being closed
marcozecchini	0:9fca2b23d0ba	7178	*/
marcozecchini	0:9fca2b23d0ba	7179	int mbedtls_ssl_close_notify( mbedtls_ssl_context *ssl )
marcozecchini	0:9fca2b23d0ba	7180	{
marcozecchini	0:9fca2b23d0ba	7181	int ret;
marcozecchini	0:9fca2b23d0ba	7182
marcozecchini	0:9fca2b23d0ba	7183	if( ssl == NULL \|\| ssl->conf == NULL )
marcozecchini	0:9fca2b23d0ba	7184	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
marcozecchini	0:9fca2b23d0ba	7185
marcozecchini	0:9fca2b23d0ba	7186	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write close notify" ) );
marcozecchini	0:9fca2b23d0ba	7187
marcozecchini	0:9fca2b23d0ba	7188	if( ssl->out_left != 0 )
marcozecchini	0:9fca2b23d0ba	7189	return( mbedtls_ssl_flush_output( ssl ) );
marcozecchini	0:9fca2b23d0ba	7190
marcozecchini	0:9fca2b23d0ba	7191	if( ssl->state == MBEDTLS_SSL_HANDSHAKE_OVER )
marcozecchini	0:9fca2b23d0ba	7192	{
marcozecchini	0:9fca2b23d0ba	7193	if( ( ret = mbedtls_ssl_send_alert_message( ssl,
marcozecchini	0:9fca2b23d0ba	7194	MBEDTLS_SSL_ALERT_LEVEL_WARNING,
marcozecchini	0:9fca2b23d0ba	7195	MBEDTLS_SSL_ALERT_MSG_CLOSE_NOTIFY ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	7196	{
marcozecchini	0:9fca2b23d0ba	7197	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_send_alert_message", ret );
marcozecchini	0:9fca2b23d0ba	7198	return( ret );
marcozecchini	0:9fca2b23d0ba	7199	}
marcozecchini	0:9fca2b23d0ba	7200	}
marcozecchini	0:9fca2b23d0ba	7201
marcozecchini	0:9fca2b23d0ba	7202	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= write close notify" ) );
marcozecchini	0:9fca2b23d0ba	7203
marcozecchini	0:9fca2b23d0ba	7204	return( 0 );
marcozecchini	0:9fca2b23d0ba	7205	}
marcozecchini	0:9fca2b23d0ba	7206
marcozecchini	0:9fca2b23d0ba	7207	void mbedtls_ssl_transform_free( mbedtls_ssl_transform *transform )
marcozecchini	0:9fca2b23d0ba	7208	{
marcozecchini	0:9fca2b23d0ba	7209	if( transform == NULL )
marcozecchini	0:9fca2b23d0ba	7210	return;
marcozecchini	0:9fca2b23d0ba	7211
marcozecchini	0:9fca2b23d0ba	7212	#if defined(MBEDTLS_ZLIB_SUPPORT)
marcozecchini	0:9fca2b23d0ba	7213	deflateEnd( &transform->ctx_deflate );
marcozecchini	0:9fca2b23d0ba	7214	inflateEnd( &transform->ctx_inflate );
marcozecchini	0:9fca2b23d0ba	7215	#endif
marcozecchini	0:9fca2b23d0ba	7216
marcozecchini	0:9fca2b23d0ba	7217	mbedtls_cipher_free( &transform->cipher_ctx_enc );
marcozecchini	0:9fca2b23d0ba	7218	mbedtls_cipher_free( &transform->cipher_ctx_dec );
marcozecchini	0:9fca2b23d0ba	7219
marcozecchini	0:9fca2b23d0ba	7220	mbedtls_md_free( &transform->md_ctx_enc );
marcozecchini	0:9fca2b23d0ba	7221	mbedtls_md_free( &transform->md_ctx_dec );
marcozecchini	0:9fca2b23d0ba	7222
marcozecchini	0:9fca2b23d0ba	7223	mbedtls_zeroize( transform, sizeof( mbedtls_ssl_transform ) );
marcozecchini	0:9fca2b23d0ba	7224	}
marcozecchini	0:9fca2b23d0ba	7225
marcozecchini	0:9fca2b23d0ba	7226	#if defined(MBEDTLS_X509_CRT_PARSE_C)
marcozecchini	0:9fca2b23d0ba	7227	static void ssl_key_cert_free( mbedtls_ssl_key_cert *key_cert )
marcozecchini	0:9fca2b23d0ba	7228	{
marcozecchini	0:9fca2b23d0ba	7229	mbedtls_ssl_key_cert cur = key_cert, next;
marcozecchini	0:9fca2b23d0ba	7230
marcozecchini	0:9fca2b23d0ba	7231	while( cur != NULL )
marcozecchini	0:9fca2b23d0ba	7232	{
marcozecchini	0:9fca2b23d0ba	7233	next = cur->next;
marcozecchini	0:9fca2b23d0ba	7234	mbedtls_free( cur );
marcozecchini	0:9fca2b23d0ba	7235	cur = next;
marcozecchini	0:9fca2b23d0ba	7236	}
marcozecchini	0:9fca2b23d0ba	7237	}
marcozecchini	0:9fca2b23d0ba	7238	#endif /* MBEDTLS_X509_CRT_PARSE_C */
marcozecchini	0:9fca2b23d0ba	7239
marcozecchini	0:9fca2b23d0ba	7240	void mbedtls_ssl_handshake_free( mbedtls_ssl_handshake_params *handshake )
marcozecchini	0:9fca2b23d0ba	7241	{
marcozecchini	0:9fca2b23d0ba	7242	if( handshake == NULL )
marcozecchini	0:9fca2b23d0ba	7243	return;
marcozecchini	0:9fca2b23d0ba	7244
marcozecchini	0:9fca2b23d0ba	7245	#if defined(MBEDTLS_SSL_PROTO_SSL3) \|\| defined(MBEDTLS_SSL_PROTO_TLS1) \|\| \
marcozecchini	0:9fca2b23d0ba	7246	defined(MBEDTLS_SSL_PROTO_TLS1_1)
marcozecchini	0:9fca2b23d0ba	7247	mbedtls_md5_free( &handshake->fin_md5 );
marcozecchini	0:9fca2b23d0ba	7248	mbedtls_sha1_free( &handshake->fin_sha1 );
marcozecchini	0:9fca2b23d0ba	7249	#endif
marcozecchini	0:9fca2b23d0ba	7250	#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
marcozecchini	0:9fca2b23d0ba	7251	#if defined(MBEDTLS_SHA256_C)
marcozecchini	0:9fca2b23d0ba	7252	mbedtls_sha256_free( &handshake->fin_sha256 );
marcozecchini	0:9fca2b23d0ba	7253	#endif
marcozecchini	0:9fca2b23d0ba	7254	#if defined(MBEDTLS_SHA512_C)
marcozecchini	0:9fca2b23d0ba	7255	mbedtls_sha512_free( &handshake->fin_sha512 );
marcozecchini	0:9fca2b23d0ba	7256	#endif
marcozecchini	0:9fca2b23d0ba	7257	#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
marcozecchini	0:9fca2b23d0ba	7258
marcozecchini	0:9fca2b23d0ba	7259	#if defined(MBEDTLS_DHM_C)
marcozecchini	0:9fca2b23d0ba	7260	mbedtls_dhm_free( &handshake->dhm_ctx );
marcozecchini	0:9fca2b23d0ba	7261	#endif
marcozecchini	0:9fca2b23d0ba	7262	#if defined(MBEDTLS_ECDH_C)
marcozecchini	0:9fca2b23d0ba	7263	mbedtls_ecdh_free( &handshake->ecdh_ctx );
marcozecchini	0:9fca2b23d0ba	7264	#endif
marcozecchini	0:9fca2b23d0ba	7265	#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
marcozecchini	0:9fca2b23d0ba	7266	mbedtls_ecjpake_free( &handshake->ecjpake_ctx );
marcozecchini	0:9fca2b23d0ba	7267	#if defined(MBEDTLS_SSL_CLI_C)
marcozecchini	0:9fca2b23d0ba	7268	mbedtls_free( handshake->ecjpake_cache );
marcozecchini	0:9fca2b23d0ba	7269	handshake->ecjpake_cache = NULL;
marcozecchini	0:9fca2b23d0ba	7270	handshake->ecjpake_cache_len = 0;
marcozecchini	0:9fca2b23d0ba	7271	#endif
marcozecchini	0:9fca2b23d0ba	7272	#endif
marcozecchini	0:9fca2b23d0ba	7273
marcozecchini	0:9fca2b23d0ba	7274	#if defined(MBEDTLS_ECDH_C) \|\| defined(MBEDTLS_ECDSA_C) \|\| \
marcozecchini	0:9fca2b23d0ba	7275	defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
marcozecchini	0:9fca2b23d0ba	7276	/* explicit void pointer cast for buggy MS compiler */
marcozecchini	0:9fca2b23d0ba	7277	mbedtls_free( (void *) handshake->curves );
marcozecchini	0:9fca2b23d0ba	7278	#endif
marcozecchini	0:9fca2b23d0ba	7279
marcozecchini	0:9fca2b23d0ba	7280	#if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
marcozecchini	0:9fca2b23d0ba	7281	if( handshake->psk != NULL )
marcozecchini	0:9fca2b23d0ba	7282	{
marcozecchini	0:9fca2b23d0ba	7283	mbedtls_zeroize( handshake->psk, handshake->psk_len );
marcozecchini	0:9fca2b23d0ba	7284	mbedtls_free( handshake->psk );
marcozecchini	0:9fca2b23d0ba	7285	}
marcozecchini	0:9fca2b23d0ba	7286	#endif
marcozecchini	0:9fca2b23d0ba	7287
marcozecchini	0:9fca2b23d0ba	7288	#if defined(MBEDTLS_X509_CRT_PARSE_C) && \
marcozecchini	0:9fca2b23d0ba	7289	defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
marcozecchini	0:9fca2b23d0ba	7290	/*
marcozecchini	0:9fca2b23d0ba	7291	* Free only the linked list wrapper, not the keys themselves
marcozecchini	0:9fca2b23d0ba	7292	* since the belong to the SNI callback
marcozecchini	0:9fca2b23d0ba	7293	*/
marcozecchini	0:9fca2b23d0ba	7294	if( handshake->sni_key_cert != NULL )
marcozecchini	0:9fca2b23d0ba	7295	{
marcozecchini	0:9fca2b23d0ba	7296	mbedtls_ssl_key_cert cur = handshake->sni_key_cert, next;
marcozecchini	0:9fca2b23d0ba	7297
marcozecchini	0:9fca2b23d0ba	7298	while( cur != NULL )
marcozecchini	0:9fca2b23d0ba	7299	{
marcozecchini	0:9fca2b23d0ba	7300	next = cur->next;
marcozecchini	0:9fca2b23d0ba	7301	mbedtls_free( cur );
marcozecchini	0:9fca2b23d0ba	7302	cur = next;
marcozecchini	0:9fca2b23d0ba	7303	}
marcozecchini	0:9fca2b23d0ba	7304	}
marcozecchini	0:9fca2b23d0ba	7305	#endif /* MBEDTLS_X509_CRT_PARSE_C && MBEDTLS_SSL_SERVER_NAME_INDICATION */
marcozecchini	0:9fca2b23d0ba	7306
marcozecchini	0:9fca2b23d0ba	7307	#if defined(MBEDTLS_SSL_PROTO_DTLS)
marcozecchini	0:9fca2b23d0ba	7308	mbedtls_free( handshake->verify_cookie );
marcozecchini	0:9fca2b23d0ba	7309	mbedtls_free( handshake->hs_msg );
marcozecchini	0:9fca2b23d0ba	7310	ssl_flight_free( handshake->flight );
marcozecchini	0:9fca2b23d0ba	7311	#endif
marcozecchini	0:9fca2b23d0ba	7312
marcozecchini	0:9fca2b23d0ba	7313	mbedtls_zeroize( handshake, sizeof( mbedtls_ssl_handshake_params ) );
marcozecchini	0:9fca2b23d0ba	7314	}
marcozecchini	0:9fca2b23d0ba	7315
marcozecchini	0:9fca2b23d0ba	7316	void mbedtls_ssl_session_free( mbedtls_ssl_session *session )
marcozecchini	0:9fca2b23d0ba	7317	{
marcozecchini	0:9fca2b23d0ba	7318	if( session == NULL )
marcozecchini	0:9fca2b23d0ba	7319	return;
marcozecchini	0:9fca2b23d0ba	7320
marcozecchini	0:9fca2b23d0ba	7321	#if defined(MBEDTLS_X509_CRT_PARSE_C)
marcozecchini	0:9fca2b23d0ba	7322	if( session->peer_cert != NULL )
marcozecchini	0:9fca2b23d0ba	7323	{
marcozecchini	0:9fca2b23d0ba	7324	mbedtls_x509_crt_free( session->peer_cert );
marcozecchini	0:9fca2b23d0ba	7325	mbedtls_free( session->peer_cert );
marcozecchini	0:9fca2b23d0ba	7326	}
marcozecchini	0:9fca2b23d0ba	7327	#endif
marcozecchini	0:9fca2b23d0ba	7328
marcozecchini	0:9fca2b23d0ba	7329	#if defined(MBEDTLS_SSL_SESSION_TICKETS) && defined(MBEDTLS_SSL_CLI_C)
marcozecchini	0:9fca2b23d0ba	7330	mbedtls_free( session->ticket );
marcozecchini	0:9fca2b23d0ba	7331	#endif
marcozecchini	0:9fca2b23d0ba	7332
marcozecchini	0:9fca2b23d0ba	7333	mbedtls_zeroize( session, sizeof( mbedtls_ssl_session ) );
marcozecchini	0:9fca2b23d0ba	7334	}
marcozecchini	0:9fca2b23d0ba	7335
marcozecchini	0:9fca2b23d0ba	7336	/*
marcozecchini	0:9fca2b23d0ba	7337	* Free an SSL context
marcozecchini	0:9fca2b23d0ba	7338	*/
marcozecchini	0:9fca2b23d0ba	7339	void mbedtls_ssl_free( mbedtls_ssl_context *ssl )
marcozecchini	0:9fca2b23d0ba	7340	{
marcozecchini	0:9fca2b23d0ba	7341	if( ssl == NULL )
marcozecchini	0:9fca2b23d0ba	7342	return;
marcozecchini	0:9fca2b23d0ba	7343
marcozecchini	0:9fca2b23d0ba	7344	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> free" ) );
marcozecchini	0:9fca2b23d0ba	7345
marcozecchini	0:9fca2b23d0ba	7346	if( ssl->out_buf != NULL )
marcozecchini	0:9fca2b23d0ba	7347	{
marcozecchini	0:9fca2b23d0ba	7348	mbedtls_zeroize( ssl->out_buf, MBEDTLS_SSL_BUFFER_LEN );
marcozecchini	0:9fca2b23d0ba	7349	mbedtls_free( ssl->out_buf );
marcozecchini	0:9fca2b23d0ba	7350	}
marcozecchini	0:9fca2b23d0ba	7351
marcozecchini	0:9fca2b23d0ba	7352	if( ssl->in_buf != NULL )
marcozecchini	0:9fca2b23d0ba	7353	{
marcozecchini	0:9fca2b23d0ba	7354	mbedtls_zeroize( ssl->in_buf, MBEDTLS_SSL_BUFFER_LEN );
marcozecchini	0:9fca2b23d0ba	7355	mbedtls_free( ssl->in_buf );
marcozecchini	0:9fca2b23d0ba	7356	}
marcozecchini	0:9fca2b23d0ba	7357
marcozecchini	0:9fca2b23d0ba	7358	#if defined(MBEDTLS_ZLIB_SUPPORT)
marcozecchini	0:9fca2b23d0ba	7359	if( ssl->compress_buf != NULL )
marcozecchini	0:9fca2b23d0ba	7360	{
marcozecchini	0:9fca2b23d0ba	7361	mbedtls_zeroize( ssl->compress_buf, MBEDTLS_SSL_BUFFER_LEN );
marcozecchini	0:9fca2b23d0ba	7362	mbedtls_free( ssl->compress_buf );
marcozecchini	0:9fca2b23d0ba	7363	}
marcozecchini	0:9fca2b23d0ba	7364	#endif
marcozecchini	0:9fca2b23d0ba	7365
marcozecchini	0:9fca2b23d0ba	7366	if( ssl->transform )
marcozecchini	0:9fca2b23d0ba	7367	{
marcozecchini	0:9fca2b23d0ba	7368	mbedtls_ssl_transform_free( ssl->transform );
marcozecchini	0:9fca2b23d0ba	7369	mbedtls_free( ssl->transform );
marcozecchini	0:9fca2b23d0ba	7370	}
marcozecchini	0:9fca2b23d0ba	7371
marcozecchini	0:9fca2b23d0ba	7372	if( ssl->handshake )
marcozecchini	0:9fca2b23d0ba	7373	{
marcozecchini	0:9fca2b23d0ba	7374	mbedtls_ssl_handshake_free( ssl->handshake );
marcozecchini	0:9fca2b23d0ba	7375	mbedtls_ssl_transform_free( ssl->transform_negotiate );
marcozecchini	0:9fca2b23d0ba	7376	mbedtls_ssl_session_free( ssl->session_negotiate );
marcozecchini	0:9fca2b23d0ba	7377
marcozecchini	0:9fca2b23d0ba	7378	mbedtls_free( ssl->handshake );
marcozecchini	0:9fca2b23d0ba	7379	mbedtls_free( ssl->transform_negotiate );
marcozecchini	0:9fca2b23d0ba	7380	mbedtls_free( ssl->session_negotiate );
marcozecchini	0:9fca2b23d0ba	7381	}
marcozecchini	0:9fca2b23d0ba	7382
marcozecchini	0:9fca2b23d0ba	7383	if( ssl->session )
marcozecchini	0:9fca2b23d0ba	7384	{
marcozecchini	0:9fca2b23d0ba	7385	mbedtls_ssl_session_free( ssl->session );
marcozecchini	0:9fca2b23d0ba	7386	mbedtls_free( ssl->session );
marcozecchini	0:9fca2b23d0ba	7387	}
marcozecchini	0:9fca2b23d0ba	7388
marcozecchini	0:9fca2b23d0ba	7389	#if defined(MBEDTLS_X509_CRT_PARSE_C)
marcozecchini	0:9fca2b23d0ba	7390	if( ssl->hostname != NULL )
marcozecchini	0:9fca2b23d0ba	7391	{
marcozecchini	0:9fca2b23d0ba	7392	mbedtls_zeroize( ssl->hostname, strlen( ssl->hostname ) );
marcozecchini	0:9fca2b23d0ba	7393	mbedtls_free( ssl->hostname );
marcozecchini	0:9fca2b23d0ba	7394	}
marcozecchini	0:9fca2b23d0ba	7395	#endif
marcozecchini	0:9fca2b23d0ba	7396
marcozecchini	0:9fca2b23d0ba	7397	#if defined(MBEDTLS_SSL_HW_RECORD_ACCEL)
marcozecchini	0:9fca2b23d0ba	7398	if( mbedtls_ssl_hw_record_finish != NULL )
marcozecchini	0:9fca2b23d0ba	7399	{
marcozecchini	0:9fca2b23d0ba	7400	MBEDTLS_SSL_DEBUG_MSG( 2, ( "going for mbedtls_ssl_hw_record_finish()" ) );
marcozecchini	0:9fca2b23d0ba	7401	mbedtls_ssl_hw_record_finish( ssl );
marcozecchini	0:9fca2b23d0ba	7402	}
marcozecchini	0:9fca2b23d0ba	7403	#endif
marcozecchini	0:9fca2b23d0ba	7404
marcozecchini	0:9fca2b23d0ba	7405	#if defined(MBEDTLS_SSL_DTLS_HELLO_VERIFY) && defined(MBEDTLS_SSL_SRV_C)
marcozecchini	0:9fca2b23d0ba	7406	mbedtls_free( ssl->cli_id );
marcozecchini	0:9fca2b23d0ba	7407	#endif
marcozecchini	0:9fca2b23d0ba	7408
marcozecchini	0:9fca2b23d0ba	7409	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= free" ) );
marcozecchini	0:9fca2b23d0ba	7410
marcozecchini	0:9fca2b23d0ba	7411	/* Actually clear after last debug message */
marcozecchini	0:9fca2b23d0ba	7412	mbedtls_zeroize( ssl, sizeof( mbedtls_ssl_context ) );
marcozecchini	0:9fca2b23d0ba	7413	}
marcozecchini	0:9fca2b23d0ba	7414
marcozecchini	0:9fca2b23d0ba	7415	/*
marcozecchini	0:9fca2b23d0ba	7416	* Initialze mbedtls_ssl_config
marcozecchini	0:9fca2b23d0ba	7417	*/
marcozecchini	0:9fca2b23d0ba	7418	void mbedtls_ssl_config_init( mbedtls_ssl_config *conf )
marcozecchini	0:9fca2b23d0ba	7419	{
marcozecchini	0:9fca2b23d0ba	7420	memset( conf, 0, sizeof( mbedtls_ssl_config ) );
marcozecchini	0:9fca2b23d0ba	7421	}
marcozecchini	0:9fca2b23d0ba	7422
marcozecchini	0:9fca2b23d0ba	7423	#if defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
marcozecchini	0:9fca2b23d0ba	7424	static int ssl_preset_default_hashes[] = {
marcozecchini	0:9fca2b23d0ba	7425	#if defined(MBEDTLS_SHA512_C)
marcozecchini	0:9fca2b23d0ba	7426	MBEDTLS_MD_SHA512,
marcozecchini	0:9fca2b23d0ba	7427	MBEDTLS_MD_SHA384,
marcozecchini	0:9fca2b23d0ba	7428	#endif
marcozecchini	0:9fca2b23d0ba	7429	#if defined(MBEDTLS_SHA256_C)
marcozecchini	0:9fca2b23d0ba	7430	MBEDTLS_MD_SHA256,
marcozecchini	0:9fca2b23d0ba	7431	MBEDTLS_MD_SHA224,
marcozecchini	0:9fca2b23d0ba	7432	#endif
marcozecchini	0:9fca2b23d0ba	7433	#if defined(MBEDTLS_SHA1_C) && defined(MBEDTLS_TLS_DEFAULT_ALLOW_SHA1_IN_KEY_EXCHANGE)
marcozecchini	0:9fca2b23d0ba	7434	MBEDTLS_MD_SHA1,
marcozecchini	0:9fca2b23d0ba	7435	#endif
marcozecchini	0:9fca2b23d0ba	7436	MBEDTLS_MD_NONE
marcozecchini	0:9fca2b23d0ba	7437	};
marcozecchini	0:9fca2b23d0ba	7438	#endif
marcozecchini	0:9fca2b23d0ba	7439
marcozecchini	0:9fca2b23d0ba	7440	static int ssl_preset_suiteb_ciphersuites[] = {
marcozecchini	0:9fca2b23d0ba	7441	MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
marcozecchini	0:9fca2b23d0ba	7442	MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
marcozecchini	0:9fca2b23d0ba	7443	0
marcozecchini	0:9fca2b23d0ba	7444	};
marcozecchini	0:9fca2b23d0ba	7445
marcozecchini	0:9fca2b23d0ba	7446	#if defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
marcozecchini	0:9fca2b23d0ba	7447	static int ssl_preset_suiteb_hashes[] = {
marcozecchini	0:9fca2b23d0ba	7448	MBEDTLS_MD_SHA256,
marcozecchini	0:9fca2b23d0ba	7449	MBEDTLS_MD_SHA384,
marcozecchini	0:9fca2b23d0ba	7450	MBEDTLS_MD_NONE
marcozecchini	0:9fca2b23d0ba	7451	};
marcozecchini	0:9fca2b23d0ba	7452	#endif
marcozecchini	0:9fca2b23d0ba	7453
marcozecchini	0:9fca2b23d0ba	7454	#if defined(MBEDTLS_ECP_C)
marcozecchini	0:9fca2b23d0ba	7455	static mbedtls_ecp_group_id ssl_preset_suiteb_curves[] = {
marcozecchini	0:9fca2b23d0ba	7456	MBEDTLS_ECP_DP_SECP256R1,
marcozecchini	0:9fca2b23d0ba	7457	MBEDTLS_ECP_DP_SECP384R1,
marcozecchini	0:9fca2b23d0ba	7458	MBEDTLS_ECP_DP_NONE
marcozecchini	0:9fca2b23d0ba	7459	};
marcozecchini	0:9fca2b23d0ba	7460	#endif
marcozecchini	0:9fca2b23d0ba	7461
marcozecchini	0:9fca2b23d0ba	7462	/*
marcozecchini	0:9fca2b23d0ba	7463	* Load default in mbedtls_ssl_config
marcozecchini	0:9fca2b23d0ba	7464	*/
marcozecchini	0:9fca2b23d0ba	7465	int mbedtls_ssl_config_defaults( mbedtls_ssl_config *conf,
marcozecchini	0:9fca2b23d0ba	7466	int endpoint, int transport, int preset )
marcozecchini	0:9fca2b23d0ba	7467	{
marcozecchini	0:9fca2b23d0ba	7468	#if defined(MBEDTLS_DHM_C) && defined(MBEDTLS_SSL_SRV_C)
marcozecchini	0:9fca2b23d0ba	7469	int ret;
marcozecchini	0:9fca2b23d0ba	7470	#endif
marcozecchini	0:9fca2b23d0ba	7471
marcozecchini	0:9fca2b23d0ba	7472	/* Use the functions here so that they are covered in tests,
marcozecchini	0:9fca2b23d0ba	7473	* but otherwise access member directly for efficiency */
marcozecchini	0:9fca2b23d0ba	7474	mbedtls_ssl_conf_endpoint( conf, endpoint );
marcozecchini	0:9fca2b23d0ba	7475	mbedtls_ssl_conf_transport( conf, transport );
marcozecchini	0:9fca2b23d0ba	7476
marcozecchini	0:9fca2b23d0ba	7477	/*
marcozecchini	0:9fca2b23d0ba	7478	* Things that are common to all presets
marcozecchini	0:9fca2b23d0ba	7479	*/
marcozecchini	0:9fca2b23d0ba	7480	#if defined(MBEDTLS_SSL_CLI_C)
marcozecchini	0:9fca2b23d0ba	7481	if( endpoint == MBEDTLS_SSL_IS_CLIENT )
marcozecchini	0:9fca2b23d0ba	7482	{
marcozecchini	0:9fca2b23d0ba	7483	conf->authmode = MBEDTLS_SSL_VERIFY_REQUIRED;
marcozecchini	0:9fca2b23d0ba	7484	#if defined(MBEDTLS_SSL_SESSION_TICKETS)
marcozecchini	0:9fca2b23d0ba	7485	conf->session_tickets = MBEDTLS_SSL_SESSION_TICKETS_ENABLED;
marcozecchini	0:9fca2b23d0ba	7486	#endif
marcozecchini	0:9fca2b23d0ba	7487	}
marcozecchini	0:9fca2b23d0ba	7488	#endif
marcozecchini	0:9fca2b23d0ba	7489
marcozecchini	0:9fca2b23d0ba	7490	#if defined(MBEDTLS_ARC4_C)
marcozecchini	0:9fca2b23d0ba	7491	conf->arc4_disabled = MBEDTLS_SSL_ARC4_DISABLED;
marcozecchini	0:9fca2b23d0ba	7492	#endif
marcozecchini	0:9fca2b23d0ba	7493
marcozecchini	0:9fca2b23d0ba	7494	#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
marcozecchini	0:9fca2b23d0ba	7495	conf->encrypt_then_mac = MBEDTLS_SSL_ETM_ENABLED;
marcozecchini	0:9fca2b23d0ba	7496	#endif
marcozecchini	0:9fca2b23d0ba	7497
marcozecchini	0:9fca2b23d0ba	7498	#if defined(MBEDTLS_SSL_EXTENDED_MASTER_SECRET)
marcozecchini	0:9fca2b23d0ba	7499	conf->extended_ms = MBEDTLS_SSL_EXTENDED_MS_ENABLED;
marcozecchini	0:9fca2b23d0ba	7500	#endif
marcozecchini	0:9fca2b23d0ba	7501
marcozecchini	0:9fca2b23d0ba	7502	#if defined(MBEDTLS_SSL_CBC_RECORD_SPLITTING)
marcozecchini	0:9fca2b23d0ba	7503	conf->cbc_record_splitting = MBEDTLS_SSL_CBC_RECORD_SPLITTING_ENABLED;
marcozecchini	0:9fca2b23d0ba	7504	#endif
marcozecchini	0:9fca2b23d0ba	7505
marcozecchini	0:9fca2b23d0ba	7506	#if defined(MBEDTLS_SSL_DTLS_HELLO_VERIFY) && defined(MBEDTLS_SSL_SRV_C)
marcozecchini	0:9fca2b23d0ba	7507	conf->f_cookie_write = ssl_cookie_write_dummy;
marcozecchini	0:9fca2b23d0ba	7508	conf->f_cookie_check = ssl_cookie_check_dummy;
marcozecchini	0:9fca2b23d0ba	7509	#endif
marcozecchini	0:9fca2b23d0ba	7510
marcozecchini	0:9fca2b23d0ba	7511	#if defined(MBEDTLS_SSL_DTLS_ANTI_REPLAY)
marcozecchini	0:9fca2b23d0ba	7512	conf->anti_replay = MBEDTLS_SSL_ANTI_REPLAY_ENABLED;
marcozecchini	0:9fca2b23d0ba	7513	#endif
marcozecchini	0:9fca2b23d0ba	7514
marcozecchini	0:9fca2b23d0ba	7515	#if defined(MBEDTLS_SSL_SRV_C)
marcozecchini	0:9fca2b23d0ba	7516	conf->cert_req_ca_list = MBEDTLS_SSL_CERT_REQ_CA_LIST_ENABLED;
marcozecchini	0:9fca2b23d0ba	7517	#endif
marcozecchini	0:9fca2b23d0ba	7518
marcozecchini	0:9fca2b23d0ba	7519	#if defined(MBEDTLS_SSL_PROTO_DTLS)
marcozecchini	0:9fca2b23d0ba	7520	conf->hs_timeout_min = MBEDTLS_SSL_DTLS_TIMEOUT_DFL_MIN;
marcozecchini	0:9fca2b23d0ba	7521	conf->hs_timeout_max = MBEDTLS_SSL_DTLS_TIMEOUT_DFL_MAX;
marcozecchini	0:9fca2b23d0ba	7522	#endif
marcozecchini	0:9fca2b23d0ba	7523
marcozecchini	0:9fca2b23d0ba	7524	#if defined(MBEDTLS_SSL_RENEGOTIATION)
marcozecchini	0:9fca2b23d0ba	7525	conf->renego_max_records = MBEDTLS_SSL_RENEGO_MAX_RECORDS_DEFAULT;
marcozecchini	0:9fca2b23d0ba	7526	memset( conf->renego_period, 0x00, 2 );
marcozecchini	0:9fca2b23d0ba	7527	memset( conf->renego_period + 2, 0xFF, 6 );
marcozecchini	0:9fca2b23d0ba	7528	#endif
marcozecchini	0:9fca2b23d0ba	7529
marcozecchini	0:9fca2b23d0ba	7530	#if defined(MBEDTLS_DHM_C) && defined(MBEDTLS_SSL_SRV_C)
marcozecchini	0:9fca2b23d0ba	7531	if( endpoint == MBEDTLS_SSL_IS_SERVER )
marcozecchini	0:9fca2b23d0ba	7532	{
marcozecchini	0:9fca2b23d0ba	7533	if( ( ret = mbedtls_ssl_conf_dh_param( conf,
marcozecchini	0:9fca2b23d0ba	7534	MBEDTLS_DHM_RFC5114_MODP_2048_P,
marcozecchini	0:9fca2b23d0ba	7535	MBEDTLS_DHM_RFC5114_MODP_2048_G ) ) != 0 )
marcozecchini	0:9fca2b23d0ba	7536	{
marcozecchini	0:9fca2b23d0ba	7537	return( ret );
marcozecchini	0:9fca2b23d0ba	7538	}
marcozecchini	0:9fca2b23d0ba	7539	}
marcozecchini	0:9fca2b23d0ba	7540	#endif
marcozecchini	0:9fca2b23d0ba	7541
marcozecchini	0:9fca2b23d0ba	7542	/*
marcozecchini	0:9fca2b23d0ba	7543	* Preset-specific defaults
marcozecchini	0:9fca2b23d0ba	7544	*/
marcozecchini	0:9fca2b23d0ba	7545	switch( preset )
marcozecchini	0:9fca2b23d0ba	7546	{
marcozecchini	0:9fca2b23d0ba	7547	/*
marcozecchini	0:9fca2b23d0ba	7548	* NSA Suite B
marcozecchini	0:9fca2b23d0ba	7549	*/
marcozecchini	0:9fca2b23d0ba	7550	case MBEDTLS_SSL_PRESET_SUITEB:
marcozecchini	0:9fca2b23d0ba	7551	conf->min_major_ver = MBEDTLS_SSL_MAJOR_VERSION_3;
marcozecchini	0:9fca2b23d0ba	7552	conf->min_minor_ver = MBEDTLS_SSL_MINOR_VERSION_3; /* TLS 1.2 */
marcozecchini	0:9fca2b23d0ba	7553	conf->max_major_ver = MBEDTLS_SSL_MAX_MAJOR_VERSION;
marcozecchini	0:9fca2b23d0ba	7554	conf->max_minor_ver = MBEDTLS_SSL_MAX_MINOR_VERSION;
marcozecchini	0:9fca2b23d0ba	7555
marcozecchini	0:9fca2b23d0ba	7556	conf->ciphersuite_list[MBEDTLS_SSL_MINOR_VERSION_0] =
marcozecchini	0:9fca2b23d0ba	7557	conf->ciphersuite_list[MBEDTLS_SSL_MINOR_VERSION_1] =
marcozecchini	0:9fca2b23d0ba	7558	conf->ciphersuite_list[MBEDTLS_SSL_MINOR_VERSION_2] =
marcozecchini	0:9fca2b23d0ba	7559	conf->ciphersuite_list[MBEDTLS_SSL_MINOR_VERSION_3] =
marcozecchini	0:9fca2b23d0ba	7560	ssl_preset_suiteb_ciphersuites;
marcozecchini	0:9fca2b23d0ba	7561
marcozecchini	0:9fca2b23d0ba	7562	#if defined(MBEDTLS_X509_CRT_PARSE_C)
marcozecchini	0:9fca2b23d0ba	7563	conf->cert_profile = &mbedtls_x509_crt_profile_suiteb;
marcozecchini	0:9fca2b23d0ba	7564	#endif
marcozecchini	0:9fca2b23d0ba	7565
marcozecchini	0:9fca2b23d0ba	7566	#if defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
marcozecchini	0:9fca2b23d0ba	7567	conf->sig_hashes = ssl_preset_suiteb_hashes;
marcozecchini	0:9fca2b23d0ba	7568	#endif
marcozecchini	0:9fca2b23d0ba	7569
marcozecchini	0:9fca2b23d0ba	7570	#if defined(MBEDTLS_ECP_C)
marcozecchini	0:9fca2b23d0ba	7571	conf->curve_list = ssl_preset_suiteb_curves;
marcozecchini	0:9fca2b23d0ba	7572	#endif
marcozecchini	0:9fca2b23d0ba	7573	break;
marcozecchini	0:9fca2b23d0ba	7574
marcozecchini	0:9fca2b23d0ba	7575	/*
marcozecchini	0:9fca2b23d0ba	7576	* Default
marcozecchini	0:9fca2b23d0ba	7577	*/
marcozecchini	0:9fca2b23d0ba	7578	default:
marcozecchini	0:9fca2b23d0ba	7579	conf->min_major_ver = MBEDTLS_SSL_MAJOR_VERSION_3;
marcozecchini	0:9fca2b23d0ba	7580	conf->min_minor_ver = MBEDTLS_SSL_MINOR_VERSION_1; /* TLS 1.0 */
marcozecchini	0:9fca2b23d0ba	7581	conf->max_major_ver = MBEDTLS_SSL_MAX_MAJOR_VERSION;
marcozecchini	0:9fca2b23d0ba	7582	conf->max_minor_ver = MBEDTLS_SSL_MAX_MINOR_VERSION;
marcozecchini	0:9fca2b23d0ba	7583
marcozecchini	0:9fca2b23d0ba	7584	#if defined(MBEDTLS_SSL_PROTO_DTLS)
marcozecchini	0:9fca2b23d0ba	7585	if( transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
marcozecchini	0:9fca2b23d0ba	7586	conf->min_minor_ver = MBEDTLS_SSL_MINOR_VERSION_2;
marcozecchini	0:9fca2b23d0ba	7587	#endif
marcozecchini	0:9fca2b23d0ba	7588
marcozecchini	0:9fca2b23d0ba	7589	conf->ciphersuite_list[MBEDTLS_SSL_MINOR_VERSION_0] =
marcozecchini	0:9fca2b23d0ba	7590	conf->ciphersuite_list[MBEDTLS_SSL_MINOR_VERSION_1] =
marcozecchini	0:9fca2b23d0ba	7591	conf->ciphersuite_list[MBEDTLS_SSL_MINOR_VERSION_2] =
marcozecchini	0:9fca2b23d0ba	7592	conf->ciphersuite_list[MBEDTLS_SSL_MINOR_VERSION_3] =
marcozecchini	0:9fca2b23d0ba	7593	mbedtls_ssl_list_ciphersuites();
marcozecchini	0:9fca2b23d0ba	7594
marcozecchini	0:9fca2b23d0ba	7595	#if defined(MBEDTLS_X509_CRT_PARSE_C)
marcozecchini	0:9fca2b23d0ba	7596	conf->cert_profile = &mbedtls_x509_crt_profile_default;
marcozecchini	0:9fca2b23d0ba	7597	#endif
marcozecchini	0:9fca2b23d0ba	7598
marcozecchini	0:9fca2b23d0ba	7599	#if defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
marcozecchini	0:9fca2b23d0ba	7600	conf->sig_hashes = ssl_preset_default_hashes;
marcozecchini	0:9fca2b23d0ba	7601	#endif
marcozecchini	0:9fca2b23d0ba	7602
marcozecchini	0:9fca2b23d0ba	7603	#if defined(MBEDTLS_ECP_C)
marcozecchini	0:9fca2b23d0ba	7604	conf->curve_list = mbedtls_ecp_grp_id_list();
marcozecchini	0:9fca2b23d0ba	7605	#endif
marcozecchini	0:9fca2b23d0ba	7606
marcozecchini	0:9fca2b23d0ba	7607	#if defined(MBEDTLS_DHM_C) && defined(MBEDTLS_SSL_CLI_C)
marcozecchini	0:9fca2b23d0ba	7608	conf->dhm_min_bitlen = 1024;
marcozecchini	0:9fca2b23d0ba	7609	#endif
marcozecchini	0:9fca2b23d0ba	7610	}
marcozecchini	0:9fca2b23d0ba	7611
marcozecchini	0:9fca2b23d0ba	7612	return( 0 );
marcozecchini	0:9fca2b23d0ba	7613	}
marcozecchini	0:9fca2b23d0ba	7614
marcozecchini	0:9fca2b23d0ba	7615	/*
marcozecchini	0:9fca2b23d0ba	7616	* Free mbedtls_ssl_config
marcozecchini	0:9fca2b23d0ba	7617	*/
marcozecchini	0:9fca2b23d0ba	7618	void mbedtls_ssl_config_free( mbedtls_ssl_config *conf )
marcozecchini	0:9fca2b23d0ba	7619	{
marcozecchini	0:9fca2b23d0ba	7620	#if defined(MBEDTLS_DHM_C)
marcozecchini	0:9fca2b23d0ba	7621	mbedtls_mpi_free( &conf->dhm_P );
marcozecchini	0:9fca2b23d0ba	7622	mbedtls_mpi_free( &conf->dhm_G );
marcozecchini	0:9fca2b23d0ba	7623	#endif
marcozecchini	0:9fca2b23d0ba	7624
marcozecchini	0:9fca2b23d0ba	7625	#if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
marcozecchini	0:9fca2b23d0ba	7626	if( conf->psk != NULL )
marcozecchini	0:9fca2b23d0ba	7627	{
marcozecchini	0:9fca2b23d0ba	7628	mbedtls_zeroize( conf->psk, conf->psk_len );
marcozecchini	0:9fca2b23d0ba	7629	mbedtls_zeroize( conf->psk_identity, conf->psk_identity_len );
marcozecchini	0:9fca2b23d0ba	7630	mbedtls_free( conf->psk );
marcozecchini	0:9fca2b23d0ba	7631	mbedtls_free( conf->psk_identity );
marcozecchini	0:9fca2b23d0ba	7632	conf->psk_len = 0;
marcozecchini	0:9fca2b23d0ba	7633	conf->psk_identity_len = 0;
marcozecchini	0:9fca2b23d0ba	7634	}
marcozecchini	0:9fca2b23d0ba	7635	#endif
marcozecchini	0:9fca2b23d0ba	7636
marcozecchini	0:9fca2b23d0ba	7637	#if defined(MBEDTLS_X509_CRT_PARSE_C)
marcozecchini	0:9fca2b23d0ba	7638	ssl_key_cert_free( conf->key_cert );
marcozecchini	0:9fca2b23d0ba	7639	#endif
marcozecchini	0:9fca2b23d0ba	7640
marcozecchini	0:9fca2b23d0ba	7641	mbedtls_zeroize( conf, sizeof( mbedtls_ssl_config ) );
marcozecchini	0:9fca2b23d0ba	7642	}
marcozecchini	0:9fca2b23d0ba	7643
marcozecchini	0:9fca2b23d0ba	7644	#if defined(MBEDTLS_PK_C) && \
marcozecchini	0:9fca2b23d0ba	7645	( defined(MBEDTLS_RSA_C) \|\| defined(MBEDTLS_ECDSA_C) )
marcozecchini	0:9fca2b23d0ba	7646	/*
marcozecchini	0:9fca2b23d0ba	7647	* Convert between MBEDTLS_PK_XXX and SSL_SIG_XXX
marcozecchini	0:9fca2b23d0ba	7648	*/
marcozecchini	0:9fca2b23d0ba	7649	unsigned char mbedtls_ssl_sig_from_pk( mbedtls_pk_context *pk )
marcozecchini	0:9fca2b23d0ba	7650	{
marcozecchini	0:9fca2b23d0ba	7651	#if defined(MBEDTLS_RSA_C)
marcozecchini	0:9fca2b23d0ba	7652	if( mbedtls_pk_can_do( pk, MBEDTLS_PK_RSA ) )
marcozecchini	0:9fca2b23d0ba	7653	return( MBEDTLS_SSL_SIG_RSA );
marcozecchini	0:9fca2b23d0ba	7654	#endif
marcozecchini	0:9fca2b23d0ba	7655	#if defined(MBEDTLS_ECDSA_C)
marcozecchini	0:9fca2b23d0ba	7656	if( mbedtls_pk_can_do( pk, MBEDTLS_PK_ECDSA ) )
marcozecchini	0:9fca2b23d0ba	7657	return( MBEDTLS_SSL_SIG_ECDSA );
marcozecchini	0:9fca2b23d0ba	7658	#endif
marcozecchini	0:9fca2b23d0ba	7659	return( MBEDTLS_SSL_SIG_ANON );
marcozecchini	0:9fca2b23d0ba	7660	}
marcozecchini	0:9fca2b23d0ba	7661
marcozecchini	0:9fca2b23d0ba	7662	unsigned char mbedtls_ssl_sig_from_pk_alg( mbedtls_pk_type_t type )
marcozecchini	0:9fca2b23d0ba	7663	{
marcozecchini	0:9fca2b23d0ba	7664	switch( type ) {
marcozecchini	0:9fca2b23d0ba	7665	case MBEDTLS_PK_RSA:
marcozecchini	0:9fca2b23d0ba	7666	return( MBEDTLS_SSL_SIG_RSA );
marcozecchini	0:9fca2b23d0ba	7667	case MBEDTLS_PK_ECDSA:
marcozecchini	0:9fca2b23d0ba	7668	case MBEDTLS_PK_ECKEY:
marcozecchini	0:9fca2b23d0ba	7669	return( MBEDTLS_SSL_SIG_ECDSA );
marcozecchini	0:9fca2b23d0ba	7670	default:
marcozecchini	0:9fca2b23d0ba	7671	return( MBEDTLS_SSL_SIG_ANON );
marcozecchini	0:9fca2b23d0ba	7672	}
marcozecchini	0:9fca2b23d0ba	7673	}
marcozecchini	0:9fca2b23d0ba	7674
marcozecchini	0:9fca2b23d0ba	7675	mbedtls_pk_type_t mbedtls_ssl_pk_alg_from_sig( unsigned char sig )
marcozecchini	0:9fca2b23d0ba	7676	{
marcozecchini	0:9fca2b23d0ba	7677	switch( sig )
marcozecchini	0:9fca2b23d0ba	7678	{
marcozecchini	0:9fca2b23d0ba	7679	#if defined(MBEDTLS_RSA_C)
marcozecchini	0:9fca2b23d0ba	7680	case MBEDTLS_SSL_SIG_RSA:
marcozecchini	0:9fca2b23d0ba	7681	return( MBEDTLS_PK_RSA );
marcozecchini	0:9fca2b23d0ba	7682	#endif
marcozecchini	0:9fca2b23d0ba	7683	#if defined(MBEDTLS_ECDSA_C)
marcozecchini	0:9fca2b23d0ba	7684	case MBEDTLS_SSL_SIG_ECDSA:
marcozecchini	0:9fca2b23d0ba	7685	return( MBEDTLS_PK_ECDSA );
marcozecchini	0:9fca2b23d0ba	7686	#endif
marcozecchini	0:9fca2b23d0ba	7687	default:
marcozecchini	0:9fca2b23d0ba	7688	return( MBEDTLS_PK_NONE );
marcozecchini	0:9fca2b23d0ba	7689	}
marcozecchini	0:9fca2b23d0ba	7690	}
marcozecchini	0:9fca2b23d0ba	7691	#endif /* MBEDTLS_PK_C && ( MBEDTLS_RSA_C \|\| MBEDTLS_ECDSA_C ) */
marcozecchini	0:9fca2b23d0ba	7692
marcozecchini	0:9fca2b23d0ba	7693	#if defined(MBEDTLS_SSL_PROTO_TLS1_2) && \
marcozecchini	0:9fca2b23d0ba	7694	defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
marcozecchini	0:9fca2b23d0ba	7695
marcozecchini	0:9fca2b23d0ba	7696	/* Find an entry in a signature-hash set matching a given hash algorithm. */
marcozecchini	0:9fca2b23d0ba	7697	mbedtls_md_type_t mbedtls_ssl_sig_hash_set_find( mbedtls_ssl_sig_hash_set_t *set,
marcozecchini	0:9fca2b23d0ba	7698	mbedtls_pk_type_t sig_alg )
marcozecchini	0:9fca2b23d0ba	7699	{
marcozecchini	0:9fca2b23d0ba	7700	switch( sig_alg )
marcozecchini	0:9fca2b23d0ba	7701	{
marcozecchini	0:9fca2b23d0ba	7702	case MBEDTLS_PK_RSA:
marcozecchini	0:9fca2b23d0ba	7703	return( set->rsa );
marcozecchini	0:9fca2b23d0ba	7704	case MBEDTLS_PK_ECDSA:
marcozecchini	0:9fca2b23d0ba	7705	return( set->ecdsa );
marcozecchini	0:9fca2b23d0ba	7706	default:
marcozecchini	0:9fca2b23d0ba	7707	return( MBEDTLS_MD_NONE );
marcozecchini	0:9fca2b23d0ba	7708	}
marcozecchini	0:9fca2b23d0ba	7709	}
marcozecchini	0:9fca2b23d0ba	7710
marcozecchini	0:9fca2b23d0ba	7711	/* Add a signature-hash-pair to a signature-hash set */
marcozecchini	0:9fca2b23d0ba	7712	void mbedtls_ssl_sig_hash_set_add( mbedtls_ssl_sig_hash_set_t *set,
marcozecchini	0:9fca2b23d0ba	7713	mbedtls_pk_type_t sig_alg,
marcozecchini	0:9fca2b23d0ba	7714	mbedtls_md_type_t md_alg )
marcozecchini	0:9fca2b23d0ba	7715	{
marcozecchini	0:9fca2b23d0ba	7716	switch( sig_alg )
marcozecchini	0:9fca2b23d0ba	7717	{
marcozecchini	0:9fca2b23d0ba	7718	case MBEDTLS_PK_RSA:
marcozecchini	0:9fca2b23d0ba	7719	if( set->rsa == MBEDTLS_MD_NONE )
marcozecchini	0:9fca2b23d0ba	7720	set->rsa = md_alg;
marcozecchini	0:9fca2b23d0ba	7721	break;
marcozecchini	0:9fca2b23d0ba	7722
marcozecchini	0:9fca2b23d0ba	7723	case MBEDTLS_PK_ECDSA:
marcozecchini	0:9fca2b23d0ba	7724	if( set->ecdsa == MBEDTLS_MD_NONE )
marcozecchini	0:9fca2b23d0ba	7725	set->ecdsa = md_alg;
marcozecchini	0:9fca2b23d0ba	7726	break;
marcozecchini	0:9fca2b23d0ba	7727
marcozecchini	0:9fca2b23d0ba	7728	default:
marcozecchini	0:9fca2b23d0ba	7729	break;
marcozecchini	0:9fca2b23d0ba	7730	}
marcozecchini	0:9fca2b23d0ba	7731	}
marcozecchini	0:9fca2b23d0ba	7732
marcozecchini	0:9fca2b23d0ba	7733	/* Allow exactly one hash algorithm for each signature. */
marcozecchini	0:9fca2b23d0ba	7734	void mbedtls_ssl_sig_hash_set_const_hash( mbedtls_ssl_sig_hash_set_t *set,
marcozecchini	0:9fca2b23d0ba	7735	mbedtls_md_type_t md_alg )
marcozecchini	0:9fca2b23d0ba	7736	{
marcozecchini	0:9fca2b23d0ba	7737	set->rsa = md_alg;
marcozecchini	0:9fca2b23d0ba	7738	set->ecdsa = md_alg;
marcozecchini	0:9fca2b23d0ba	7739	}
marcozecchini	0:9fca2b23d0ba	7740
marcozecchini	0:9fca2b23d0ba	7741	#endif /* MBEDTLS_SSL_PROTO_TLS1_2) &&
marcozecchini	0:9fca2b23d0ba	7742	MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED */
marcozecchini	0:9fca2b23d0ba	7743
marcozecchini	0:9fca2b23d0ba	7744	/*
marcozecchini	0:9fca2b23d0ba	7745	* Convert from MBEDTLS_SSL_HASH_XXX to MBEDTLS_MD_XXX
marcozecchini	0:9fca2b23d0ba	7746	*/
marcozecchini	0:9fca2b23d0ba	7747	mbedtls_md_type_t mbedtls_ssl_md_alg_from_hash( unsigned char hash )
marcozecchini	0:9fca2b23d0ba	7748	{
marcozecchini	0:9fca2b23d0ba	7749	switch( hash )
marcozecchini	0:9fca2b23d0ba	7750	{
marcozecchini	0:9fca2b23d0ba	7751	#if defined(MBEDTLS_MD5_C)
marcozecchini	0:9fca2b23d0ba	7752	case MBEDTLS_SSL_HASH_MD5:
marcozecchini	0:9fca2b23d0ba	7753	return( MBEDTLS_MD_MD5 );
marcozecchini	0:9fca2b23d0ba	7754	#endif
marcozecchini	0:9fca2b23d0ba	7755	#if defined(MBEDTLS_SHA1_C)
marcozecchini	0:9fca2b23d0ba	7756	case MBEDTLS_SSL_HASH_SHA1:
marcozecchini	0:9fca2b23d0ba	7757	return( MBEDTLS_MD_SHA1 );
marcozecchini	0:9fca2b23d0ba	7758	#endif
marcozecchini	0:9fca2b23d0ba	7759	#if defined(MBEDTLS_SHA256_C)
marcozecchini	0:9fca2b23d0ba	7760	case MBEDTLS_SSL_HASH_SHA224:
marcozecchini	0:9fca2b23d0ba	7761	return( MBEDTLS_MD_SHA224 );
marcozecchini	0:9fca2b23d0ba	7762	case MBEDTLS_SSL_HASH_SHA256:
marcozecchini	0:9fca2b23d0ba	7763	return( MBEDTLS_MD_SHA256 );
marcozecchini	0:9fca2b23d0ba	7764	#endif
marcozecchini	0:9fca2b23d0ba	7765	#if defined(MBEDTLS_SHA512_C)
marcozecchini	0:9fca2b23d0ba	7766	case MBEDTLS_SSL_HASH_SHA384:
marcozecchini	0:9fca2b23d0ba	7767	return( MBEDTLS_MD_SHA384 );
marcozecchini	0:9fca2b23d0ba	7768	case MBEDTLS_SSL_HASH_SHA512:
marcozecchini	0:9fca2b23d0ba	7769	return( MBEDTLS_MD_SHA512 );
marcozecchini	0:9fca2b23d0ba	7770	#endif
marcozecchini	0:9fca2b23d0ba	7771	default:
marcozecchini	0:9fca2b23d0ba	7772	return( MBEDTLS_MD_NONE );
marcozecchini	0:9fca2b23d0ba	7773	}
marcozecchini	0:9fca2b23d0ba	7774	}
marcozecchini	0:9fca2b23d0ba	7775
marcozecchini	0:9fca2b23d0ba	7776	/*
marcozecchini	0:9fca2b23d0ba	7777	* Convert from MBEDTLS_MD_XXX to MBEDTLS_SSL_HASH_XXX
marcozecchini	0:9fca2b23d0ba	7778	*/
marcozecchini	0:9fca2b23d0ba	7779	unsigned char mbedtls_ssl_hash_from_md_alg( int md )
marcozecchini	0:9fca2b23d0ba	7780	{
marcozecchini	0:9fca2b23d0ba	7781	switch( md )
marcozecchini	0:9fca2b23d0ba	7782	{
marcozecchini	0:9fca2b23d0ba	7783	#if defined(MBEDTLS_MD5_C)
marcozecchini	0:9fca2b23d0ba	7784	case MBEDTLS_MD_MD5:
marcozecchini	0:9fca2b23d0ba	7785	return( MBEDTLS_SSL_HASH_MD5 );
marcozecchini	0:9fca2b23d0ba	7786	#endif
marcozecchini	0:9fca2b23d0ba	7787	#if defined(MBEDTLS_SHA1_C)
marcozecchini	0:9fca2b23d0ba	7788	case MBEDTLS_MD_SHA1:
marcozecchini	0:9fca2b23d0ba	7789	return( MBEDTLS_SSL_HASH_SHA1 );
marcozecchini	0:9fca2b23d0ba	7790	#endif
marcozecchini	0:9fca2b23d0ba	7791	#if defined(MBEDTLS_SHA256_C)
marcozecchini	0:9fca2b23d0ba	7792	case MBEDTLS_MD_SHA224:
marcozecchini	0:9fca2b23d0ba	7793	return( MBEDTLS_SSL_HASH_SHA224 );
marcozecchini	0:9fca2b23d0ba	7794	case MBEDTLS_MD_SHA256:
marcozecchini	0:9fca2b23d0ba	7795	return( MBEDTLS_SSL_HASH_SHA256 );
marcozecchini	0:9fca2b23d0ba	7796	#endif
marcozecchini	0:9fca2b23d0ba	7797	#if defined(MBEDTLS_SHA512_C)
marcozecchini	0:9fca2b23d0ba	7798	case MBEDTLS_MD_SHA384:
marcozecchini	0:9fca2b23d0ba	7799	return( MBEDTLS_SSL_HASH_SHA384 );
marcozecchini	0:9fca2b23d0ba	7800	case MBEDTLS_MD_SHA512:
marcozecchini	0:9fca2b23d0ba	7801	return( MBEDTLS_SSL_HASH_SHA512 );
marcozecchini	0:9fca2b23d0ba	7802	#endif
marcozecchini	0:9fca2b23d0ba	7803	default:
marcozecchini	0:9fca2b23d0ba	7804	return( MBEDTLS_SSL_HASH_NONE );
marcozecchini	0:9fca2b23d0ba	7805	}
marcozecchini	0:9fca2b23d0ba	7806	}
marcozecchini	0:9fca2b23d0ba	7807
marcozecchini	0:9fca2b23d0ba	7808	#if defined(MBEDTLS_ECP_C)
marcozecchini	0:9fca2b23d0ba	7809	/*
marcozecchini	0:9fca2b23d0ba	7810	* Check if a curve proposed by the peer is in our list.
marcozecchini	0:9fca2b23d0ba	7811	* Return 0 if we're willing to use it, -1 otherwise.
marcozecchini	0:9fca2b23d0ba	7812	*/
marcozecchini	0:9fca2b23d0ba	7813	int mbedtls_ssl_check_curve( const mbedtls_ssl_context *ssl, mbedtls_ecp_group_id grp_id )
marcozecchini	0:9fca2b23d0ba	7814	{
marcozecchini	0:9fca2b23d0ba	7815	const mbedtls_ecp_group_id *gid;
marcozecchini	0:9fca2b23d0ba	7816
marcozecchini	0:9fca2b23d0ba	7817	if( ssl->conf->curve_list == NULL )
marcozecchini	0:9fca2b23d0ba	7818	return( -1 );
marcozecchini	0:9fca2b23d0ba	7819
marcozecchini	0:9fca2b23d0ba	7820	for( gid = ssl->conf->curve_list; *gid != MBEDTLS_ECP_DP_NONE; gid++ )
marcozecchini	0:9fca2b23d0ba	7821	if( *gid == grp_id )
marcozecchini	0:9fca2b23d0ba	7822	return( 0 );
marcozecchini	0:9fca2b23d0ba	7823
marcozecchini	0:9fca2b23d0ba	7824	return( -1 );
marcozecchini	0:9fca2b23d0ba	7825	}
marcozecchini	0:9fca2b23d0ba	7826	#endif /* MBEDTLS_ECP_C */
marcozecchini	0:9fca2b23d0ba	7827
marcozecchini	0:9fca2b23d0ba	7828	#if defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
marcozecchini	0:9fca2b23d0ba	7829	/*
marcozecchini	0:9fca2b23d0ba	7830	* Check if a hash proposed by the peer is in our list.
marcozecchini	0:9fca2b23d0ba	7831	* Return 0 if we're willing to use it, -1 otherwise.
marcozecchini	0:9fca2b23d0ba	7832	*/
marcozecchini	0:9fca2b23d0ba	7833	int mbedtls_ssl_check_sig_hash( const mbedtls_ssl_context *ssl,
marcozecchini	0:9fca2b23d0ba	7834	mbedtls_md_type_t md )
marcozecchini	0:9fca2b23d0ba	7835	{
marcozecchini	0:9fca2b23d0ba	7836	const int *cur;
marcozecchini	0:9fca2b23d0ba	7837
marcozecchini	0:9fca2b23d0ba	7838	if( ssl->conf->sig_hashes == NULL )
marcozecchini	0:9fca2b23d0ba	7839	return( -1 );
marcozecchini	0:9fca2b23d0ba	7840
marcozecchini	0:9fca2b23d0ba	7841	for( cur = ssl->conf->sig_hashes; *cur != MBEDTLS_MD_NONE; cur++ )
marcozecchini	0:9fca2b23d0ba	7842	if( *cur == (int) md )
marcozecchini	0:9fca2b23d0ba	7843	return( 0 );
marcozecchini	0:9fca2b23d0ba	7844
marcozecchini	0:9fca2b23d0ba	7845	return( -1 );
marcozecchini	0:9fca2b23d0ba	7846	}
marcozecchini	0:9fca2b23d0ba	7847	#endif /* MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED */
marcozecchini	0:9fca2b23d0ba	7848
marcozecchini	0:9fca2b23d0ba	7849	#if defined(MBEDTLS_X509_CRT_PARSE_C)
marcozecchini	0:9fca2b23d0ba	7850	int mbedtls_ssl_check_cert_usage( const mbedtls_x509_crt *cert,
marcozecchini	0:9fca2b23d0ba	7851	const mbedtls_ssl_ciphersuite_t *ciphersuite,
marcozecchini	0:9fca2b23d0ba	7852	int cert_endpoint,
marcozecchini	0:9fca2b23d0ba	7853	uint32_t *flags )
marcozecchini	0:9fca2b23d0ba	7854	{
marcozecchini	0:9fca2b23d0ba	7855	int ret = 0;
marcozecchini	0:9fca2b23d0ba	7856	#if defined(MBEDTLS_X509_CHECK_KEY_USAGE)
marcozecchini	0:9fca2b23d0ba	7857	int usage = 0;
marcozecchini	0:9fca2b23d0ba	7858	#endif
marcozecchini	0:9fca2b23d0ba	7859	#if defined(MBEDTLS_X509_CHECK_EXTENDED_KEY_USAGE)
marcozecchini	0:9fca2b23d0ba	7860	const char *ext_oid;
marcozecchini	0:9fca2b23d0ba	7861	size_t ext_len;
marcozecchini	0:9fca2b23d0ba	7862	#endif
marcozecchini	0:9fca2b23d0ba	7863
marcozecchini	0:9fca2b23d0ba	7864	#if !defined(MBEDTLS_X509_CHECK_KEY_USAGE) && \
marcozecchini	0:9fca2b23d0ba	7865	!defined(MBEDTLS_X509_CHECK_EXTENDED_KEY_USAGE)
marcozecchini	0:9fca2b23d0ba	7866	((void) cert);
marcozecchini	0:9fca2b23d0ba	7867	((void) cert_endpoint);
marcozecchini	0:9fca2b23d0ba	7868	((void) flags);
marcozecchini	0:9fca2b23d0ba	7869	#endif
marcozecchini	0:9fca2b23d0ba	7870
marcozecchini	0:9fca2b23d0ba	7871	#if defined(MBEDTLS_X509_CHECK_KEY_USAGE)
marcozecchini	0:9fca2b23d0ba	7872	if( cert_endpoint == MBEDTLS_SSL_IS_SERVER )
marcozecchini	0:9fca2b23d0ba	7873	{
marcozecchini	0:9fca2b23d0ba	7874	/* Server part of the key exchange */
marcozecchini	0:9fca2b23d0ba	7875	switch( ciphersuite->key_exchange )
marcozecchini	0:9fca2b23d0ba	7876	{
marcozecchini	0:9fca2b23d0ba	7877	case MBEDTLS_KEY_EXCHANGE_RSA:
marcozecchini	0:9fca2b23d0ba	7878	case MBEDTLS_KEY_EXCHANGE_RSA_PSK:
marcozecchini	0:9fca2b23d0ba	7879	usage = MBEDTLS_X509_KU_KEY_ENCIPHERMENT;
marcozecchini	0:9fca2b23d0ba	7880	break;
marcozecchini	0:9fca2b23d0ba	7881
marcozecchini	0:9fca2b23d0ba	7882	case MBEDTLS_KEY_EXCHANGE_DHE_RSA:
marcozecchini	0:9fca2b23d0ba	7883	case MBEDTLS_KEY_EXCHANGE_ECDHE_RSA:
marcozecchini	0:9fca2b23d0ba	7884	case MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA:
marcozecchini	0:9fca2b23d0ba	7885	usage = MBEDTLS_X509_KU_DIGITAL_SIGNATURE;
marcozecchini	0:9fca2b23d0ba	7886	break;
marcozecchini	0:9fca2b23d0ba	7887
marcozecchini	0:9fca2b23d0ba	7888	case MBEDTLS_KEY_EXCHANGE_ECDH_RSA:
marcozecchini	0:9fca2b23d0ba	7889	case MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA:
marcozecchini	0:9fca2b23d0ba	7890	usage = MBEDTLS_X509_KU_KEY_AGREEMENT;
marcozecchini	0:9fca2b23d0ba	7891	break;
marcozecchini	0:9fca2b23d0ba	7892
marcozecchini	0:9fca2b23d0ba	7893	/* Don't use default: we want warnings when adding new values */
marcozecchini	0:9fca2b23d0ba	7894	case MBEDTLS_KEY_EXCHANGE_NONE:
marcozecchini	0:9fca2b23d0ba	7895	case MBEDTLS_KEY_EXCHANGE_PSK:
marcozecchini	0:9fca2b23d0ba	7896	case MBEDTLS_KEY_EXCHANGE_DHE_PSK:
marcozecchini	0:9fca2b23d0ba	7897	case MBEDTLS_KEY_EXCHANGE_ECDHE_PSK:
marcozecchini	0:9fca2b23d0ba	7898	case MBEDTLS_KEY_EXCHANGE_ECJPAKE:
marcozecchini	0:9fca2b23d0ba	7899	usage = 0;
marcozecchini	0:9fca2b23d0ba	7900	}
marcozecchini	0:9fca2b23d0ba	7901	}
marcozecchini	0:9fca2b23d0ba	7902	else
marcozecchini	0:9fca2b23d0ba	7903	{
marcozecchini	0:9fca2b23d0ba	7904	/* Client auth: we only implement rsa_sign and mbedtls_ecdsa_sign for now */
marcozecchini	0:9fca2b23d0ba	7905	usage = MBEDTLS_X509_KU_DIGITAL_SIGNATURE;
marcozecchini	0:9fca2b23d0ba	7906	}
marcozecchini	0:9fca2b23d0ba	7907
marcozecchini	0:9fca2b23d0ba	7908	if( mbedtls_x509_crt_check_key_usage( cert, usage ) != 0 )
marcozecchini	0:9fca2b23d0ba	7909	{
marcozecchini	0:9fca2b23d0ba	7910	*flags \|= MBEDTLS_X509_BADCERT_KEY_USAGE;
marcozecchini	0:9fca2b23d0ba	7911	ret = -1;
marcozecchini	0:9fca2b23d0ba	7912	}
marcozecchini	0:9fca2b23d0ba	7913	#else
marcozecchini	0:9fca2b23d0ba	7914	((void) ciphersuite);
marcozecchini	0:9fca2b23d0ba	7915	#endif /* MBEDTLS_X509_CHECK_KEY_USAGE */
marcozecchini	0:9fca2b23d0ba	7916
marcozecchini	0:9fca2b23d0ba	7917	#if defined(MBEDTLS_X509_CHECK_EXTENDED_KEY_USAGE)
marcozecchini	0:9fca2b23d0ba	7918	if( cert_endpoint == MBEDTLS_SSL_IS_SERVER )
marcozecchini	0:9fca2b23d0ba	7919	{
marcozecchini	0:9fca2b23d0ba	7920	ext_oid = MBEDTLS_OID_SERVER_AUTH;
marcozecchini	0:9fca2b23d0ba	7921	ext_len = MBEDTLS_OID_SIZE( MBEDTLS_OID_SERVER_AUTH );
marcozecchini	0:9fca2b23d0ba	7922	}
marcozecchini	0:9fca2b23d0ba	7923	else
marcozecchini	0:9fca2b23d0ba	7924	{
marcozecchini	0:9fca2b23d0ba	7925	ext_oid = MBEDTLS_OID_CLIENT_AUTH;
marcozecchini	0:9fca2b23d0ba	7926	ext_len = MBEDTLS_OID_SIZE( MBEDTLS_OID_CLIENT_AUTH );
marcozecchini	0:9fca2b23d0ba	7927	}
marcozecchini	0:9fca2b23d0ba	7928
marcozecchini	0:9fca2b23d0ba	7929	if( mbedtls_x509_crt_check_extended_key_usage( cert, ext_oid, ext_len ) != 0 )
marcozecchini	0:9fca2b23d0ba	7930	{
marcozecchini	0:9fca2b23d0ba	7931	*flags \|= MBEDTLS_X509_BADCERT_EXT_KEY_USAGE;
marcozecchini	0:9fca2b23d0ba	7932	ret = -1;
marcozecchini	0:9fca2b23d0ba	7933	}
marcozecchini	0:9fca2b23d0ba	7934	#endif /* MBEDTLS_X509_CHECK_EXTENDED_KEY_USAGE */
marcozecchini	0:9fca2b23d0ba	7935
marcozecchini	0:9fca2b23d0ba	7936	return( ret );
marcozecchini	0:9fca2b23d0ba	7937	}
marcozecchini	0:9fca2b23d0ba	7938	#endif /* MBEDTLS_X509_CRT_PARSE_C */
marcozecchini	0:9fca2b23d0ba	7939
marcozecchini	0:9fca2b23d0ba	7940	/*
marcozecchini	0:9fca2b23d0ba	7941	* Convert version numbers to/from wire format
marcozecchini	0:9fca2b23d0ba	7942	* and, for DTLS, to/from TLS equivalent.
marcozecchini	0:9fca2b23d0ba	7943	*
marcozecchini	0:9fca2b23d0ba	7944	* For TLS this is the identity.
marcozecchini	0:9fca2b23d0ba	7945	* For DTLS, use 1's complement (v -> 255 - v, and then map as follows:
marcozecchini	0:9fca2b23d0ba	7946	* 1.0 <-> 3.2 (DTLS 1.0 is based on TLS 1.1)
marcozecchini	0:9fca2b23d0ba	7947	* 1.x <-> 3.x+1 for x != 0 (DTLS 1.2 based on TLS 1.2)
marcozecchini	0:9fca2b23d0ba	7948	*/
marcozecchini	0:9fca2b23d0ba	7949	void mbedtls_ssl_write_version( int major, int minor, int transport,
marcozecchini	0:9fca2b23d0ba	7950	unsigned char ver[2] )
marcozecchini	0:9fca2b23d0ba	7951	{
marcozecchini	0:9fca2b23d0ba	7952	#if defined(MBEDTLS_SSL_PROTO_DTLS)
marcozecchini	0:9fca2b23d0ba	7953	if( transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
marcozecchini	0:9fca2b23d0ba	7954	{
marcozecchini	0:9fca2b23d0ba	7955	if( minor == MBEDTLS_SSL_MINOR_VERSION_2 )
marcozecchini	0:9fca2b23d0ba	7956	--minor; /* DTLS 1.0 stored as TLS 1.1 internally */
marcozecchini	0:9fca2b23d0ba	7957
marcozecchini	0:9fca2b23d0ba	7958	ver[0] = (unsigned char)( 255 - ( major - 2 ) );
marcozecchini	0:9fca2b23d0ba	7959	ver[1] = (unsigned char)( 255 - ( minor - 1 ) );
marcozecchini	0:9fca2b23d0ba	7960	}
marcozecchini	0:9fca2b23d0ba	7961	else
marcozecchini	0:9fca2b23d0ba	7962	#else
marcozecchini	0:9fca2b23d0ba	7963	((void) transport);
marcozecchini	0:9fca2b23d0ba	7964	#endif
marcozecchini	0:9fca2b23d0ba	7965	{
marcozecchini	0:9fca2b23d0ba	7966	ver[0] = (unsigned char) major;
marcozecchini	0:9fca2b23d0ba	7967	ver[1] = (unsigned char) minor;
marcozecchini	0:9fca2b23d0ba	7968	}
marcozecchini	0:9fca2b23d0ba	7969	}
marcozecchini	0:9fca2b23d0ba	7970
marcozecchini	0:9fca2b23d0ba	7971	void mbedtls_ssl_read_version( int major, int minor, int transport,
marcozecchini	0:9fca2b23d0ba	7972	const unsigned char ver[2] )
marcozecchini	0:9fca2b23d0ba	7973	{
marcozecchini	0:9fca2b23d0ba	7974	#if defined(MBEDTLS_SSL_PROTO_DTLS)
marcozecchini	0:9fca2b23d0ba	7975	if( transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
marcozecchini	0:9fca2b23d0ba	7976	{
marcozecchini	0:9fca2b23d0ba	7977	*major = 255 - ver[0] + 2;
marcozecchini	0:9fca2b23d0ba	7978	*minor = 255 - ver[1] + 1;
marcozecchini	0:9fca2b23d0ba	7979
marcozecchini	0:9fca2b23d0ba	7980	if( *minor == MBEDTLS_SSL_MINOR_VERSION_1 )
marcozecchini	0:9fca2b23d0ba	7981	++minor; / DTLS 1.0 stored as TLS 1.1 internally */
marcozecchini	0:9fca2b23d0ba	7982	}
marcozecchini	0:9fca2b23d0ba	7983	else
marcozecchini	0:9fca2b23d0ba	7984	#else
marcozecchini	0:9fca2b23d0ba	7985	((void) transport);
marcozecchini	0:9fca2b23d0ba	7986	#endif
marcozecchini	0:9fca2b23d0ba	7987	{
marcozecchini	0:9fca2b23d0ba	7988	*major = ver[0];
marcozecchini	0:9fca2b23d0ba	7989	*minor = ver[1];
marcozecchini	0:9fca2b23d0ba	7990	}
marcozecchini	0:9fca2b23d0ba	7991	}
marcozecchini	0:9fca2b23d0ba	7992
marcozecchini	0:9fca2b23d0ba	7993	int mbedtls_ssl_set_calc_verify_md( mbedtls_ssl_context *ssl, int md )
marcozecchini	0:9fca2b23d0ba	7994	{
marcozecchini	0:9fca2b23d0ba	7995	#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
marcozecchini	0:9fca2b23d0ba	7996	if( ssl->minor_ver != MBEDTLS_SSL_MINOR_VERSION_3 )
marcozecchini	0:9fca2b23d0ba	7997	return MBEDTLS_ERR_SSL_INVALID_VERIFY_HASH;
marcozecchini	0:9fca2b23d0ba	7998
marcozecchini	0:9fca2b23d0ba	7999	switch( md )
marcozecchini	0:9fca2b23d0ba	8000	{
marcozecchini	0:9fca2b23d0ba	8001	#if defined(MBEDTLS_SSL_PROTO_TLS1) \|\| defined(MBEDTLS_SSL_PROTO_TLS1_1)
marcozecchini	0:9fca2b23d0ba	8002	#if defined(MBEDTLS_MD5_C)
marcozecchini	0:9fca2b23d0ba	8003	case MBEDTLS_SSL_HASH_MD5:
marcozecchini	0:9fca2b23d0ba	8004	return MBEDTLS_ERR_SSL_INVALID_VERIFY_HASH;
marcozecchini	0:9fca2b23d0ba	8005	#endif
marcozecchini	0:9fca2b23d0ba	8006	#if defined(MBEDTLS_SHA1_C)
marcozecchini	0:9fca2b23d0ba	8007	case MBEDTLS_SSL_HASH_SHA1:
marcozecchini	0:9fca2b23d0ba	8008	ssl->handshake->calc_verify = ssl_calc_verify_tls;
marcozecchini	0:9fca2b23d0ba	8009	break;
marcozecchini	0:9fca2b23d0ba	8010	#endif
marcozecchini	0:9fca2b23d0ba	8011	#endif /* MBEDTLS_SSL_PROTO_TLS1 \|\| MBEDTLS_SSL_PROTO_TLS1_1 */
marcozecchini	0:9fca2b23d0ba	8012	#if defined(MBEDTLS_SHA512_C)
marcozecchini	0:9fca2b23d0ba	8013	case MBEDTLS_SSL_HASH_SHA384:
marcozecchini	0:9fca2b23d0ba	8014	ssl->handshake->calc_verify = ssl_calc_verify_tls_sha384;
marcozecchini	0:9fca2b23d0ba	8015	break;
marcozecchini	0:9fca2b23d0ba	8016	#endif
marcozecchini	0:9fca2b23d0ba	8017	#if defined(MBEDTLS_SHA256_C)
marcozecchini	0:9fca2b23d0ba	8018	case MBEDTLS_SSL_HASH_SHA256:
marcozecchini	0:9fca2b23d0ba	8019	ssl->handshake->calc_verify = ssl_calc_verify_tls_sha256;
marcozecchini	0:9fca2b23d0ba	8020	break;
marcozecchini	0:9fca2b23d0ba	8021	#endif
marcozecchini	0:9fca2b23d0ba	8022	default:
marcozecchini	0:9fca2b23d0ba	8023	return MBEDTLS_ERR_SSL_INVALID_VERIFY_HASH;
marcozecchini	0:9fca2b23d0ba	8024	}
marcozecchini	0:9fca2b23d0ba	8025
marcozecchini	0:9fca2b23d0ba	8026	return 0;
marcozecchini	0:9fca2b23d0ba	8027	#else /* !MBEDTLS_SSL_PROTO_TLS1_2 */
marcozecchini	0:9fca2b23d0ba	8028	(void) ssl;
marcozecchini	0:9fca2b23d0ba	8029	(void) md;
marcozecchini	0:9fca2b23d0ba	8030
marcozecchini	0:9fca2b23d0ba	8031	return MBEDTLS_ERR_SSL_INVALID_VERIFY_HASH;
marcozecchini	0:9fca2b23d0ba	8032	#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
marcozecchini	0:9fca2b23d0ba	8033	}
marcozecchini	0:9fca2b23d0ba	8034
marcozecchini	0:9fca2b23d0ba	8035	#endif /* MBEDTLS_SSL_TLS_C */

Repository toolbox

Export to desktop IDE

Build repository

Repository details

Type:	Program
Mbed OS support:	Mbed OS
Created:	23 Feb 2019
Imports:	43
Forks:	0
Commits:	1
Dependents:	0
Dependencies:	0
Followers:	1

mbed-os/features/mbedtls/src/ssl_tls.c@0:9fca2b23d0ba, 2019-02-23 (annotated)

Who changed what in which revision?

Repository toolbox

Repository details

Important Information for this Arm website

Access Warning