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Preliminary main mbed library for nexpaq development

features/mbedtls/src/ssl_tls.c@0:6c56fb4bc5f0, 2016-11-04 (annotated)

Committer:: nexpaq
Date:: Fri Nov 04 20:27:58 2016 +0000
Revision:: 0:6c56fb4bc5f0

Moving to library for sharing updates

Who changed what in which revision?

User	Revision	Line number	New contents of line
nexpaq	0:6c56fb4bc5f0	1	/*
nexpaq	0:6c56fb4bc5f0	2	* SSLv3/TLSv1 shared functions
nexpaq	0:6c56fb4bc5f0	3	*
nexpaq	0:6c56fb4bc5f0	4	* Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
nexpaq	0:6c56fb4bc5f0	5	* SPDX-License-Identifier: Apache-2.0
nexpaq	0:6c56fb4bc5f0	6	*
nexpaq	0:6c56fb4bc5f0	7	* Licensed under the Apache License, Version 2.0 (the "License"); you may
nexpaq	0:6c56fb4bc5f0	8	* not use this file except in compliance with the License.
nexpaq	0:6c56fb4bc5f0	9	* You may obtain a copy of the License at
nexpaq	0:6c56fb4bc5f0	10	*
nexpaq	0:6c56fb4bc5f0	11	* http://www.apache.org/licenses/LICENSE-2.0
nexpaq	0:6c56fb4bc5f0	12	*
nexpaq	0:6c56fb4bc5f0	13	* Unless required by applicable law or agreed to in writing, software
nexpaq	0:6c56fb4bc5f0	14	* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
nexpaq	0:6c56fb4bc5f0	15	* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
nexpaq	0:6c56fb4bc5f0	16	* See the License for the specific language governing permissions and
nexpaq	0:6c56fb4bc5f0	17	* limitations under the License.
nexpaq	0:6c56fb4bc5f0	18	*
nexpaq	0:6c56fb4bc5f0	19	* This file is part of mbed TLS (https://tls.mbed.org)
nexpaq	0:6c56fb4bc5f0	20	*/
nexpaq	0:6c56fb4bc5f0	21	/*
nexpaq	0:6c56fb4bc5f0	22	* The SSL 3.0 specification was drafted by Netscape in 1996,
nexpaq	0:6c56fb4bc5f0	23	* and became an IETF standard in 1999.
nexpaq	0:6c56fb4bc5f0	24	*
nexpaq	0:6c56fb4bc5f0	25	* http://wp.netscape.com/eng/ssl3/
nexpaq	0:6c56fb4bc5f0	26	* http://www.ietf.org/rfc/rfc2246.txt
nexpaq	0:6c56fb4bc5f0	27	* http://www.ietf.org/rfc/rfc4346.txt
nexpaq	0:6c56fb4bc5f0	28	*/
nexpaq	0:6c56fb4bc5f0	29
nexpaq	0:6c56fb4bc5f0	30	#if !defined(MBEDTLS_CONFIG_FILE)
nexpaq	0:6c56fb4bc5f0	31	#include "mbedtls/config.h"
nexpaq	0:6c56fb4bc5f0	32	#else
nexpaq	0:6c56fb4bc5f0	33	#include MBEDTLS_CONFIG_FILE
nexpaq	0:6c56fb4bc5f0	34	#endif
nexpaq	0:6c56fb4bc5f0	35
nexpaq	0:6c56fb4bc5f0	36	#if defined(MBEDTLS_SSL_TLS_C)
nexpaq	0:6c56fb4bc5f0	37
nexpaq	0:6c56fb4bc5f0	38	#if defined(MBEDTLS_PLATFORM_C)
nexpaq	0:6c56fb4bc5f0	39	#include "mbedtls/platform.h"
nexpaq	0:6c56fb4bc5f0	40	#else
nexpaq	0:6c56fb4bc5f0	41	#include <stdlib.h>
nexpaq	0:6c56fb4bc5f0	42	#define mbedtls_calloc calloc
nexpaq	0:6c56fb4bc5f0	43	#define mbedtls_free free
nexpaq	0:6c56fb4bc5f0	44	#define mbedtls_time_t time_t
nexpaq	0:6c56fb4bc5f0	45	#endif
nexpaq	0:6c56fb4bc5f0	46
nexpaq	0:6c56fb4bc5f0	47	#include "mbedtls/debug.h"
nexpaq	0:6c56fb4bc5f0	48	#include "mbedtls/ssl.h"
nexpaq	0:6c56fb4bc5f0	49	#include "mbedtls/ssl_internal.h"
nexpaq	0:6c56fb4bc5f0	50
nexpaq	0:6c56fb4bc5f0	51	#include <string.h>
nexpaq	0:6c56fb4bc5f0	52
nexpaq	0:6c56fb4bc5f0	53	#if defined(MBEDTLS_X509_CRT_PARSE_C) && \
nexpaq	0:6c56fb4bc5f0	54	defined(MBEDTLS_X509_CHECK_EXTENDED_KEY_USAGE)
nexpaq	0:6c56fb4bc5f0	55	#include "mbedtls/oid.h"
nexpaq	0:6c56fb4bc5f0	56	#endif
nexpaq	0:6c56fb4bc5f0	57
nexpaq	0:6c56fb4bc5f0	58	/* Implementation that should never be optimized out by the compiler */
nexpaq	0:6c56fb4bc5f0	59	static void mbedtls_zeroize( void *v, size_t n ) {
nexpaq	0:6c56fb4bc5f0	60	volatile unsigned char p = v; while( n-- ) p++ = 0;
nexpaq	0:6c56fb4bc5f0	61	}
nexpaq	0:6c56fb4bc5f0	62
nexpaq	0:6c56fb4bc5f0	63	/* Length of the "epoch" field in the record header */
nexpaq	0:6c56fb4bc5f0	64	static inline size_t ssl_ep_len( const mbedtls_ssl_context *ssl )
nexpaq	0:6c56fb4bc5f0	65	{
nexpaq	0:6c56fb4bc5f0	66	#if defined(MBEDTLS_SSL_PROTO_DTLS)
nexpaq	0:6c56fb4bc5f0	67	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
nexpaq	0:6c56fb4bc5f0	68	return( 2 );
nexpaq	0:6c56fb4bc5f0	69	#else
nexpaq	0:6c56fb4bc5f0	70	((void) ssl);
nexpaq	0:6c56fb4bc5f0	71	#endif
nexpaq	0:6c56fb4bc5f0	72	return( 0 );
nexpaq	0:6c56fb4bc5f0	73	}
nexpaq	0:6c56fb4bc5f0	74
nexpaq	0:6c56fb4bc5f0	75	/*
nexpaq	0:6c56fb4bc5f0	76	* Start a timer.
nexpaq	0:6c56fb4bc5f0	77	* Passing millisecs = 0 cancels a running timer.
nexpaq	0:6c56fb4bc5f0	78	*/
nexpaq	0:6c56fb4bc5f0	79	static void ssl_set_timer( mbedtls_ssl_context *ssl, uint32_t millisecs )
nexpaq	0:6c56fb4bc5f0	80	{
nexpaq	0:6c56fb4bc5f0	81	if( ssl->f_set_timer == NULL )
nexpaq	0:6c56fb4bc5f0	82	return;
nexpaq	0:6c56fb4bc5f0	83
nexpaq	0:6c56fb4bc5f0	84	MBEDTLS_SSL_DEBUG_MSG( 3, ( "set_timer to %d ms", (int) millisecs ) );
nexpaq	0:6c56fb4bc5f0	85	ssl->f_set_timer( ssl->p_timer, millisecs / 4, millisecs );
nexpaq	0:6c56fb4bc5f0	86	}
nexpaq	0:6c56fb4bc5f0	87
nexpaq	0:6c56fb4bc5f0	88	/*
nexpaq	0:6c56fb4bc5f0	89	* Return -1 is timer is expired, 0 if it isn't.
nexpaq	0:6c56fb4bc5f0	90	*/
nexpaq	0:6c56fb4bc5f0	91	static int ssl_check_timer( mbedtls_ssl_context *ssl )
nexpaq	0:6c56fb4bc5f0	92	{
nexpaq	0:6c56fb4bc5f0	93	if( ssl->f_get_timer == NULL )
nexpaq	0:6c56fb4bc5f0	94	return( 0 );
nexpaq	0:6c56fb4bc5f0	95
nexpaq	0:6c56fb4bc5f0	96	if( ssl->f_get_timer( ssl->p_timer ) == 2 )
nexpaq	0:6c56fb4bc5f0	97	{
nexpaq	0:6c56fb4bc5f0	98	MBEDTLS_SSL_DEBUG_MSG( 3, ( "timer expired" ) );
nexpaq	0:6c56fb4bc5f0	99	return( -1 );
nexpaq	0:6c56fb4bc5f0	100	}
nexpaq	0:6c56fb4bc5f0	101
nexpaq	0:6c56fb4bc5f0	102	return( 0 );
nexpaq	0:6c56fb4bc5f0	103	}
nexpaq	0:6c56fb4bc5f0	104
nexpaq	0:6c56fb4bc5f0	105	#if defined(MBEDTLS_SSL_PROTO_DTLS)
nexpaq	0:6c56fb4bc5f0	106	/*
nexpaq	0:6c56fb4bc5f0	107	* Double the retransmit timeout value, within the allowed range,
nexpaq	0:6c56fb4bc5f0	108	* returning -1 if the maximum value has already been reached.
nexpaq	0:6c56fb4bc5f0	109	*/
nexpaq	0:6c56fb4bc5f0	110	static int ssl_double_retransmit_timeout( mbedtls_ssl_context *ssl )
nexpaq	0:6c56fb4bc5f0	111	{
nexpaq	0:6c56fb4bc5f0	112	uint32_t new_timeout;
nexpaq	0:6c56fb4bc5f0	113
nexpaq	0:6c56fb4bc5f0	114	if( ssl->handshake->retransmit_timeout >= ssl->conf->hs_timeout_max )
nexpaq	0:6c56fb4bc5f0	115	return( -1 );
nexpaq	0:6c56fb4bc5f0	116
nexpaq	0:6c56fb4bc5f0	117	new_timeout = 2 * ssl->handshake->retransmit_timeout;
nexpaq	0:6c56fb4bc5f0	118
nexpaq	0:6c56fb4bc5f0	119	/* Avoid arithmetic overflow and range overflow */
nexpaq	0:6c56fb4bc5f0	120	if( new_timeout < ssl->handshake->retransmit_timeout \|\|
nexpaq	0:6c56fb4bc5f0	121	new_timeout > ssl->conf->hs_timeout_max )
nexpaq	0:6c56fb4bc5f0	122	{
nexpaq	0:6c56fb4bc5f0	123	new_timeout = ssl->conf->hs_timeout_max;
nexpaq	0:6c56fb4bc5f0	124	}
nexpaq	0:6c56fb4bc5f0	125
nexpaq	0:6c56fb4bc5f0	126	ssl->handshake->retransmit_timeout = new_timeout;
nexpaq	0:6c56fb4bc5f0	127	MBEDTLS_SSL_DEBUG_MSG( 3, ( "update timeout value to %d millisecs",
nexpaq	0:6c56fb4bc5f0	128	ssl->handshake->retransmit_timeout ) );
nexpaq	0:6c56fb4bc5f0	129
nexpaq	0:6c56fb4bc5f0	130	return( 0 );
nexpaq	0:6c56fb4bc5f0	131	}
nexpaq	0:6c56fb4bc5f0	132
nexpaq	0:6c56fb4bc5f0	133	static void ssl_reset_retransmit_timeout( mbedtls_ssl_context *ssl )
nexpaq	0:6c56fb4bc5f0	134	{
nexpaq	0:6c56fb4bc5f0	135	ssl->handshake->retransmit_timeout = ssl->conf->hs_timeout_min;
nexpaq	0:6c56fb4bc5f0	136	MBEDTLS_SSL_DEBUG_MSG( 3, ( "update timeout value to %d millisecs",
nexpaq	0:6c56fb4bc5f0	137	ssl->handshake->retransmit_timeout ) );
nexpaq	0:6c56fb4bc5f0	138	}
nexpaq	0:6c56fb4bc5f0	139	#endif /* MBEDTLS_SSL_PROTO_DTLS */
nexpaq	0:6c56fb4bc5f0	140
nexpaq	0:6c56fb4bc5f0	141	#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
nexpaq	0:6c56fb4bc5f0	142	/*
nexpaq	0:6c56fb4bc5f0	143	* Convert max_fragment_length codes to length.
nexpaq	0:6c56fb4bc5f0	144	* RFC 6066 says:
nexpaq	0:6c56fb4bc5f0	145	* enum{
nexpaq	0:6c56fb4bc5f0	146	* 2^9(1), 2^10(2), 2^11(3), 2^12(4), (255)
nexpaq	0:6c56fb4bc5f0	147	* } MaxFragmentLength;
nexpaq	0:6c56fb4bc5f0	148	* and we add 0 -> extension unused
nexpaq	0:6c56fb4bc5f0	149	*/
nexpaq	0:6c56fb4bc5f0	150	static unsigned int mfl_code_to_length[MBEDTLS_SSL_MAX_FRAG_LEN_INVALID] =
nexpaq	0:6c56fb4bc5f0	151	{
nexpaq	0:6c56fb4bc5f0	152	MBEDTLS_SSL_MAX_CONTENT_LEN, /* MBEDTLS_SSL_MAX_FRAG_LEN_NONE */
nexpaq	0:6c56fb4bc5f0	153	512, /* MBEDTLS_SSL_MAX_FRAG_LEN_512 */
nexpaq	0:6c56fb4bc5f0	154	1024, /* MBEDTLS_SSL_MAX_FRAG_LEN_1024 */
nexpaq	0:6c56fb4bc5f0	155	2048, /* MBEDTLS_SSL_MAX_FRAG_LEN_2048 */
nexpaq	0:6c56fb4bc5f0	156	4096, /* MBEDTLS_SSL_MAX_FRAG_LEN_4096 */
nexpaq	0:6c56fb4bc5f0	157	};
nexpaq	0:6c56fb4bc5f0	158	#endif /* MBEDTLS_SSL_MAX_FRAGMENT_LENGTH */
nexpaq	0:6c56fb4bc5f0	159
nexpaq	0:6c56fb4bc5f0	160	#if defined(MBEDTLS_SSL_CLI_C)
nexpaq	0:6c56fb4bc5f0	161	static int ssl_session_copy( mbedtls_ssl_session dst, const mbedtls_ssl_session src )
nexpaq	0:6c56fb4bc5f0	162	{
nexpaq	0:6c56fb4bc5f0	163	mbedtls_ssl_session_free( dst );
nexpaq	0:6c56fb4bc5f0	164	memcpy( dst, src, sizeof( mbedtls_ssl_session ) );
nexpaq	0:6c56fb4bc5f0	165
nexpaq	0:6c56fb4bc5f0	166	#if defined(MBEDTLS_X509_CRT_PARSE_C)
nexpaq	0:6c56fb4bc5f0	167	if( src->peer_cert != NULL )
nexpaq	0:6c56fb4bc5f0	168	{
nexpaq	0:6c56fb4bc5f0	169	int ret;
nexpaq	0:6c56fb4bc5f0	170
nexpaq	0:6c56fb4bc5f0	171	dst->peer_cert = mbedtls_calloc( 1, sizeof(mbedtls_x509_crt) );
nexpaq	0:6c56fb4bc5f0	172	if( dst->peer_cert == NULL )
nexpaq	0:6c56fb4bc5f0	173	return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
nexpaq	0:6c56fb4bc5f0	174
nexpaq	0:6c56fb4bc5f0	175	mbedtls_x509_crt_init( dst->peer_cert );
nexpaq	0:6c56fb4bc5f0	176
nexpaq	0:6c56fb4bc5f0	177	if( ( ret = mbedtls_x509_crt_parse_der( dst->peer_cert, src->peer_cert->raw.p,
nexpaq	0:6c56fb4bc5f0	178	src->peer_cert->raw.len ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	179	{
nexpaq	0:6c56fb4bc5f0	180	mbedtls_free( dst->peer_cert );
nexpaq	0:6c56fb4bc5f0	181	dst->peer_cert = NULL;
nexpaq	0:6c56fb4bc5f0	182	return( ret );
nexpaq	0:6c56fb4bc5f0	183	}
nexpaq	0:6c56fb4bc5f0	184	}
nexpaq	0:6c56fb4bc5f0	185	#endif /* MBEDTLS_X509_CRT_PARSE_C */
nexpaq	0:6c56fb4bc5f0	186
nexpaq	0:6c56fb4bc5f0	187	#if defined(MBEDTLS_SSL_SESSION_TICKETS) && defined(MBEDTLS_SSL_CLI_C)
nexpaq	0:6c56fb4bc5f0	188	if( src->ticket != NULL )
nexpaq	0:6c56fb4bc5f0	189	{
nexpaq	0:6c56fb4bc5f0	190	dst->ticket = mbedtls_calloc( 1, src->ticket_len );
nexpaq	0:6c56fb4bc5f0	191	if( dst->ticket == NULL )
nexpaq	0:6c56fb4bc5f0	192	return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
nexpaq	0:6c56fb4bc5f0	193
nexpaq	0:6c56fb4bc5f0	194	memcpy( dst->ticket, src->ticket, src->ticket_len );
nexpaq	0:6c56fb4bc5f0	195	}
nexpaq	0:6c56fb4bc5f0	196	#endif /* MBEDTLS_SSL_SESSION_TICKETS && MBEDTLS_SSL_CLI_C */
nexpaq	0:6c56fb4bc5f0	197
nexpaq	0:6c56fb4bc5f0	198	return( 0 );
nexpaq	0:6c56fb4bc5f0	199	}
nexpaq	0:6c56fb4bc5f0	200	#endif /* MBEDTLS_SSL_CLI_C */
nexpaq	0:6c56fb4bc5f0	201
nexpaq	0:6c56fb4bc5f0	202	#if defined(MBEDTLS_SSL_HW_RECORD_ACCEL)
nexpaq	0:6c56fb4bc5f0	203	int (mbedtls_ssl_hw_record_init)( mbedtls_ssl_context ssl,
nexpaq	0:6c56fb4bc5f0	204	const unsigned char key_enc, const unsigned char key_dec,
nexpaq	0:6c56fb4bc5f0	205	size_t keylen,
nexpaq	0:6c56fb4bc5f0	206	const unsigned char iv_enc, const unsigned char iv_dec,
nexpaq	0:6c56fb4bc5f0	207	size_t ivlen,
nexpaq	0:6c56fb4bc5f0	208	const unsigned char mac_enc, const unsigned char mac_dec,
nexpaq	0:6c56fb4bc5f0	209	size_t maclen ) = NULL;
nexpaq	0:6c56fb4bc5f0	210	int (mbedtls_ssl_hw_record_activate)( mbedtls_ssl_context ssl, int direction) = NULL;
nexpaq	0:6c56fb4bc5f0	211	int (mbedtls_ssl_hw_record_reset)( mbedtls_ssl_context ssl ) = NULL;
nexpaq	0:6c56fb4bc5f0	212	int (mbedtls_ssl_hw_record_write)( mbedtls_ssl_context ssl ) = NULL;
nexpaq	0:6c56fb4bc5f0	213	int (mbedtls_ssl_hw_record_read)( mbedtls_ssl_context ssl ) = NULL;
nexpaq	0:6c56fb4bc5f0	214	int (mbedtls_ssl_hw_record_finish)( mbedtls_ssl_context ssl ) = NULL;
nexpaq	0:6c56fb4bc5f0	215	#endif /* MBEDTLS_SSL_HW_RECORD_ACCEL */
nexpaq	0:6c56fb4bc5f0	216
nexpaq	0:6c56fb4bc5f0	217	/*
nexpaq	0:6c56fb4bc5f0	218	* Key material generation
nexpaq	0:6c56fb4bc5f0	219	*/
nexpaq	0:6c56fb4bc5f0	220	#if defined(MBEDTLS_SSL_PROTO_SSL3)
nexpaq	0:6c56fb4bc5f0	221	static int ssl3_prf( const unsigned char *secret, size_t slen,
nexpaq	0:6c56fb4bc5f0	222	const char *label,
nexpaq	0:6c56fb4bc5f0	223	const unsigned char *random, size_t rlen,
nexpaq	0:6c56fb4bc5f0	224	unsigned char *dstbuf, size_t dlen )
nexpaq	0:6c56fb4bc5f0	225	{
nexpaq	0:6c56fb4bc5f0	226	size_t i;
nexpaq	0:6c56fb4bc5f0	227	mbedtls_md5_context md5;
nexpaq	0:6c56fb4bc5f0	228	mbedtls_sha1_context sha1;
nexpaq	0:6c56fb4bc5f0	229	unsigned char padding[16];
nexpaq	0:6c56fb4bc5f0	230	unsigned char sha1sum[20];
nexpaq	0:6c56fb4bc5f0	231	((void)label);
nexpaq	0:6c56fb4bc5f0	232
nexpaq	0:6c56fb4bc5f0	233	mbedtls_md5_init( &md5 );
nexpaq	0:6c56fb4bc5f0	234	mbedtls_sha1_init( &sha1 );
nexpaq	0:6c56fb4bc5f0	235
nexpaq	0:6c56fb4bc5f0	236	/*
nexpaq	0:6c56fb4bc5f0	237	* SSLv3:
nexpaq	0:6c56fb4bc5f0	238	* block =
nexpaq	0:6c56fb4bc5f0	239	* MD5( secret + SHA1( 'A' + secret + random ) ) +
nexpaq	0:6c56fb4bc5f0	240	* MD5( secret + SHA1( 'BB' + secret + random ) ) +
nexpaq	0:6c56fb4bc5f0	241	* MD5( secret + SHA1( 'CCC' + secret + random ) ) +
nexpaq	0:6c56fb4bc5f0	242	* ...
nexpaq	0:6c56fb4bc5f0	243	*/
nexpaq	0:6c56fb4bc5f0	244	for( i = 0; i < dlen / 16; i++ )
nexpaq	0:6c56fb4bc5f0	245	{
nexpaq	0:6c56fb4bc5f0	246	memset( padding, (unsigned char) ('A' + i), 1 + i );
nexpaq	0:6c56fb4bc5f0	247
nexpaq	0:6c56fb4bc5f0	248	mbedtls_sha1_starts( &sha1 );
nexpaq	0:6c56fb4bc5f0	249	mbedtls_sha1_update( &sha1, padding, 1 + i );
nexpaq	0:6c56fb4bc5f0	250	mbedtls_sha1_update( &sha1, secret, slen );
nexpaq	0:6c56fb4bc5f0	251	mbedtls_sha1_update( &sha1, random, rlen );
nexpaq	0:6c56fb4bc5f0	252	mbedtls_sha1_finish( &sha1, sha1sum );
nexpaq	0:6c56fb4bc5f0	253
nexpaq	0:6c56fb4bc5f0	254	mbedtls_md5_starts( &md5 );
nexpaq	0:6c56fb4bc5f0	255	mbedtls_md5_update( &md5, secret, slen );
nexpaq	0:6c56fb4bc5f0	256	mbedtls_md5_update( &md5, sha1sum, 20 );
nexpaq	0:6c56fb4bc5f0	257	mbedtls_md5_finish( &md5, dstbuf + i * 16 );
nexpaq	0:6c56fb4bc5f0	258	}
nexpaq	0:6c56fb4bc5f0	259
nexpaq	0:6c56fb4bc5f0	260	mbedtls_md5_free( &md5 );
nexpaq	0:6c56fb4bc5f0	261	mbedtls_sha1_free( &sha1 );
nexpaq	0:6c56fb4bc5f0	262
nexpaq	0:6c56fb4bc5f0	263	mbedtls_zeroize( padding, sizeof( padding ) );
nexpaq	0:6c56fb4bc5f0	264	mbedtls_zeroize( sha1sum, sizeof( sha1sum ) );
nexpaq	0:6c56fb4bc5f0	265
nexpaq	0:6c56fb4bc5f0	266	return( 0 );
nexpaq	0:6c56fb4bc5f0	267	}
nexpaq	0:6c56fb4bc5f0	268	#endif /* MBEDTLS_SSL_PROTO_SSL3 */
nexpaq	0:6c56fb4bc5f0	269
nexpaq	0:6c56fb4bc5f0	270	#if defined(MBEDTLS_SSL_PROTO_TLS1) \|\| defined(MBEDTLS_SSL_PROTO_TLS1_1)
nexpaq	0:6c56fb4bc5f0	271	static int tls1_prf( const unsigned char *secret, size_t slen,
nexpaq	0:6c56fb4bc5f0	272	const char *label,
nexpaq	0:6c56fb4bc5f0	273	const unsigned char *random, size_t rlen,
nexpaq	0:6c56fb4bc5f0	274	unsigned char *dstbuf, size_t dlen )
nexpaq	0:6c56fb4bc5f0	275	{
nexpaq	0:6c56fb4bc5f0	276	size_t nb, hs;
nexpaq	0:6c56fb4bc5f0	277	size_t i, j, k;
nexpaq	0:6c56fb4bc5f0	278	const unsigned char S1, S2;
nexpaq	0:6c56fb4bc5f0	279	unsigned char tmp[128];
nexpaq	0:6c56fb4bc5f0	280	unsigned char h_i[20];
nexpaq	0:6c56fb4bc5f0	281	const mbedtls_md_info_t *md_info;
nexpaq	0:6c56fb4bc5f0	282	mbedtls_md_context_t md_ctx;
nexpaq	0:6c56fb4bc5f0	283	int ret;
nexpaq	0:6c56fb4bc5f0	284
nexpaq	0:6c56fb4bc5f0	285	mbedtls_md_init( &md_ctx );
nexpaq	0:6c56fb4bc5f0	286
nexpaq	0:6c56fb4bc5f0	287	if( sizeof( tmp ) < 20 + strlen( label ) + rlen )
nexpaq	0:6c56fb4bc5f0	288	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
nexpaq	0:6c56fb4bc5f0	289
nexpaq	0:6c56fb4bc5f0	290	hs = ( slen + 1 ) / 2;
nexpaq	0:6c56fb4bc5f0	291	S1 = secret;
nexpaq	0:6c56fb4bc5f0	292	S2 = secret + slen - hs;
nexpaq	0:6c56fb4bc5f0	293
nexpaq	0:6c56fb4bc5f0	294	nb = strlen( label );
nexpaq	0:6c56fb4bc5f0	295	memcpy( tmp + 20, label, nb );
nexpaq	0:6c56fb4bc5f0	296	memcpy( tmp + 20 + nb, random, rlen );
nexpaq	0:6c56fb4bc5f0	297	nb += rlen;
nexpaq	0:6c56fb4bc5f0	298
nexpaq	0:6c56fb4bc5f0	299	/*
nexpaq	0:6c56fb4bc5f0	300	* First compute P_md5(secret,label+random)[0..dlen]
nexpaq	0:6c56fb4bc5f0	301	*/
nexpaq	0:6c56fb4bc5f0	302	if( ( md_info = mbedtls_md_info_from_type( MBEDTLS_MD_MD5 ) ) == NULL )
nexpaq	0:6c56fb4bc5f0	303	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
nexpaq	0:6c56fb4bc5f0	304
nexpaq	0:6c56fb4bc5f0	305	if( ( ret = mbedtls_md_setup( &md_ctx, md_info, 1 ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	306	return( ret );
nexpaq	0:6c56fb4bc5f0	307
nexpaq	0:6c56fb4bc5f0	308	mbedtls_md_hmac_starts( &md_ctx, S1, hs );
nexpaq	0:6c56fb4bc5f0	309	mbedtls_md_hmac_update( &md_ctx, tmp + 20, nb );
nexpaq	0:6c56fb4bc5f0	310	mbedtls_md_hmac_finish( &md_ctx, 4 + tmp );
nexpaq	0:6c56fb4bc5f0	311
nexpaq	0:6c56fb4bc5f0	312	for( i = 0; i < dlen; i += 16 )
nexpaq	0:6c56fb4bc5f0	313	{
nexpaq	0:6c56fb4bc5f0	314	mbedtls_md_hmac_reset ( &md_ctx );
nexpaq	0:6c56fb4bc5f0	315	mbedtls_md_hmac_update( &md_ctx, 4 + tmp, 16 + nb );
nexpaq	0:6c56fb4bc5f0	316	mbedtls_md_hmac_finish( &md_ctx, h_i );
nexpaq	0:6c56fb4bc5f0	317
nexpaq	0:6c56fb4bc5f0	318	mbedtls_md_hmac_reset ( &md_ctx );
nexpaq	0:6c56fb4bc5f0	319	mbedtls_md_hmac_update( &md_ctx, 4 + tmp, 16 );
nexpaq	0:6c56fb4bc5f0	320	mbedtls_md_hmac_finish( &md_ctx, 4 + tmp );
nexpaq	0:6c56fb4bc5f0	321
nexpaq	0:6c56fb4bc5f0	322	k = ( i + 16 > dlen ) ? dlen % 16 : 16;
nexpaq	0:6c56fb4bc5f0	323
nexpaq	0:6c56fb4bc5f0	324	for( j = 0; j < k; j++ )
nexpaq	0:6c56fb4bc5f0	325	dstbuf[i + j] = h_i[j];
nexpaq	0:6c56fb4bc5f0	326	}
nexpaq	0:6c56fb4bc5f0	327
nexpaq	0:6c56fb4bc5f0	328	mbedtls_md_free( &md_ctx );
nexpaq	0:6c56fb4bc5f0	329
nexpaq	0:6c56fb4bc5f0	330	/*
nexpaq	0:6c56fb4bc5f0	331	* XOR out with P_sha1(secret,label+random)[0..dlen]
nexpaq	0:6c56fb4bc5f0	332	*/
nexpaq	0:6c56fb4bc5f0	333	if( ( md_info = mbedtls_md_info_from_type( MBEDTLS_MD_SHA1 ) ) == NULL )
nexpaq	0:6c56fb4bc5f0	334	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
nexpaq	0:6c56fb4bc5f0	335
nexpaq	0:6c56fb4bc5f0	336	if( ( ret = mbedtls_md_setup( &md_ctx, md_info, 1 ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	337	return( ret );
nexpaq	0:6c56fb4bc5f0	338
nexpaq	0:6c56fb4bc5f0	339	mbedtls_md_hmac_starts( &md_ctx, S2, hs );
nexpaq	0:6c56fb4bc5f0	340	mbedtls_md_hmac_update( &md_ctx, tmp + 20, nb );
nexpaq	0:6c56fb4bc5f0	341	mbedtls_md_hmac_finish( &md_ctx, tmp );
nexpaq	0:6c56fb4bc5f0	342
nexpaq	0:6c56fb4bc5f0	343	for( i = 0; i < dlen; i += 20 )
nexpaq	0:6c56fb4bc5f0	344	{
nexpaq	0:6c56fb4bc5f0	345	mbedtls_md_hmac_reset ( &md_ctx );
nexpaq	0:6c56fb4bc5f0	346	mbedtls_md_hmac_update( &md_ctx, tmp, 20 + nb );
nexpaq	0:6c56fb4bc5f0	347	mbedtls_md_hmac_finish( &md_ctx, h_i );
nexpaq	0:6c56fb4bc5f0	348
nexpaq	0:6c56fb4bc5f0	349	mbedtls_md_hmac_reset ( &md_ctx );
nexpaq	0:6c56fb4bc5f0	350	mbedtls_md_hmac_update( &md_ctx, tmp, 20 );
nexpaq	0:6c56fb4bc5f0	351	mbedtls_md_hmac_finish( &md_ctx, tmp );
nexpaq	0:6c56fb4bc5f0	352
nexpaq	0:6c56fb4bc5f0	353	k = ( i + 20 > dlen ) ? dlen % 20 : 20;
nexpaq	0:6c56fb4bc5f0	354
nexpaq	0:6c56fb4bc5f0	355	for( j = 0; j < k; j++ )
nexpaq	0:6c56fb4bc5f0	356	dstbuf[i + j] = (unsigned char)( dstbuf[i + j] ^ h_i[j] );
nexpaq	0:6c56fb4bc5f0	357	}
nexpaq	0:6c56fb4bc5f0	358
nexpaq	0:6c56fb4bc5f0	359	mbedtls_md_free( &md_ctx );
nexpaq	0:6c56fb4bc5f0	360
nexpaq	0:6c56fb4bc5f0	361	mbedtls_zeroize( tmp, sizeof( tmp ) );
nexpaq	0:6c56fb4bc5f0	362	mbedtls_zeroize( h_i, sizeof( h_i ) );
nexpaq	0:6c56fb4bc5f0	363
nexpaq	0:6c56fb4bc5f0	364	return( 0 );
nexpaq	0:6c56fb4bc5f0	365	}
nexpaq	0:6c56fb4bc5f0	366	#endif /* MBEDTLS_SSL_PROTO_TLS1) \|\| MBEDTLS_SSL_PROTO_TLS1_1 */
nexpaq	0:6c56fb4bc5f0	367
nexpaq	0:6c56fb4bc5f0	368	#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
nexpaq	0:6c56fb4bc5f0	369	static int tls_prf_generic( mbedtls_md_type_t md_type,
nexpaq	0:6c56fb4bc5f0	370	const unsigned char *secret, size_t slen,
nexpaq	0:6c56fb4bc5f0	371	const char *label,
nexpaq	0:6c56fb4bc5f0	372	const unsigned char *random, size_t rlen,
nexpaq	0:6c56fb4bc5f0	373	unsigned char *dstbuf, size_t dlen )
nexpaq	0:6c56fb4bc5f0	374	{
nexpaq	0:6c56fb4bc5f0	375	size_t nb;
nexpaq	0:6c56fb4bc5f0	376	size_t i, j, k, md_len;
nexpaq	0:6c56fb4bc5f0	377	unsigned char tmp[128];
nexpaq	0:6c56fb4bc5f0	378	unsigned char h_i[MBEDTLS_MD_MAX_SIZE];
nexpaq	0:6c56fb4bc5f0	379	const mbedtls_md_info_t *md_info;
nexpaq	0:6c56fb4bc5f0	380	mbedtls_md_context_t md_ctx;
nexpaq	0:6c56fb4bc5f0	381	int ret;
nexpaq	0:6c56fb4bc5f0	382
nexpaq	0:6c56fb4bc5f0	383	mbedtls_md_init( &md_ctx );
nexpaq	0:6c56fb4bc5f0	384
nexpaq	0:6c56fb4bc5f0	385	if( ( md_info = mbedtls_md_info_from_type( md_type ) ) == NULL )
nexpaq	0:6c56fb4bc5f0	386	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
nexpaq	0:6c56fb4bc5f0	387
nexpaq	0:6c56fb4bc5f0	388	md_len = mbedtls_md_get_size( md_info );
nexpaq	0:6c56fb4bc5f0	389
nexpaq	0:6c56fb4bc5f0	390	if( sizeof( tmp ) < md_len + strlen( label ) + rlen )
nexpaq	0:6c56fb4bc5f0	391	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
nexpaq	0:6c56fb4bc5f0	392
nexpaq	0:6c56fb4bc5f0	393	nb = strlen( label );
nexpaq	0:6c56fb4bc5f0	394	memcpy( tmp + md_len, label, nb );
nexpaq	0:6c56fb4bc5f0	395	memcpy( tmp + md_len + nb, random, rlen );
nexpaq	0:6c56fb4bc5f0	396	nb += rlen;
nexpaq	0:6c56fb4bc5f0	397
nexpaq	0:6c56fb4bc5f0	398	/*
nexpaq	0:6c56fb4bc5f0	399	* Compute P_<hash>(secret, label + random)[0..dlen]
nexpaq	0:6c56fb4bc5f0	400	*/
nexpaq	0:6c56fb4bc5f0	401	if ( ( ret = mbedtls_md_setup( &md_ctx, md_info, 1 ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	402	return( ret );
nexpaq	0:6c56fb4bc5f0	403
nexpaq	0:6c56fb4bc5f0	404	mbedtls_md_hmac_starts( &md_ctx, secret, slen );
nexpaq	0:6c56fb4bc5f0	405	mbedtls_md_hmac_update( &md_ctx, tmp + md_len, nb );
nexpaq	0:6c56fb4bc5f0	406	mbedtls_md_hmac_finish( &md_ctx, tmp );
nexpaq	0:6c56fb4bc5f0	407
nexpaq	0:6c56fb4bc5f0	408	for( i = 0; i < dlen; i += md_len )
nexpaq	0:6c56fb4bc5f0	409	{
nexpaq	0:6c56fb4bc5f0	410	mbedtls_md_hmac_reset ( &md_ctx );
nexpaq	0:6c56fb4bc5f0	411	mbedtls_md_hmac_update( &md_ctx, tmp, md_len + nb );
nexpaq	0:6c56fb4bc5f0	412	mbedtls_md_hmac_finish( &md_ctx, h_i );
nexpaq	0:6c56fb4bc5f0	413
nexpaq	0:6c56fb4bc5f0	414	mbedtls_md_hmac_reset ( &md_ctx );
nexpaq	0:6c56fb4bc5f0	415	mbedtls_md_hmac_update( &md_ctx, tmp, md_len );
nexpaq	0:6c56fb4bc5f0	416	mbedtls_md_hmac_finish( &md_ctx, tmp );
nexpaq	0:6c56fb4bc5f0	417
nexpaq	0:6c56fb4bc5f0	418	k = ( i + md_len > dlen ) ? dlen % md_len : md_len;
nexpaq	0:6c56fb4bc5f0	419
nexpaq	0:6c56fb4bc5f0	420	for( j = 0; j < k; j++ )
nexpaq	0:6c56fb4bc5f0	421	dstbuf[i + j] = h_i[j];
nexpaq	0:6c56fb4bc5f0	422	}
nexpaq	0:6c56fb4bc5f0	423
nexpaq	0:6c56fb4bc5f0	424	mbedtls_md_free( &md_ctx );
nexpaq	0:6c56fb4bc5f0	425
nexpaq	0:6c56fb4bc5f0	426	mbedtls_zeroize( tmp, sizeof( tmp ) );
nexpaq	0:6c56fb4bc5f0	427	mbedtls_zeroize( h_i, sizeof( h_i ) );
nexpaq	0:6c56fb4bc5f0	428
nexpaq	0:6c56fb4bc5f0	429	return( 0 );
nexpaq	0:6c56fb4bc5f0	430	}
nexpaq	0:6c56fb4bc5f0	431
nexpaq	0:6c56fb4bc5f0	432	#if defined(MBEDTLS_SHA256_C)
nexpaq	0:6c56fb4bc5f0	433	static int tls_prf_sha256( const unsigned char *secret, size_t slen,
nexpaq	0:6c56fb4bc5f0	434	const char *label,
nexpaq	0:6c56fb4bc5f0	435	const unsigned char *random, size_t rlen,
nexpaq	0:6c56fb4bc5f0	436	unsigned char *dstbuf, size_t dlen )
nexpaq	0:6c56fb4bc5f0	437	{
nexpaq	0:6c56fb4bc5f0	438	return( tls_prf_generic( MBEDTLS_MD_SHA256, secret, slen,
nexpaq	0:6c56fb4bc5f0	439	label, random, rlen, dstbuf, dlen ) );
nexpaq	0:6c56fb4bc5f0	440	}
nexpaq	0:6c56fb4bc5f0	441	#endif /* MBEDTLS_SHA256_C */
nexpaq	0:6c56fb4bc5f0	442
nexpaq	0:6c56fb4bc5f0	443	#if defined(MBEDTLS_SHA512_C)
nexpaq	0:6c56fb4bc5f0	444	static int tls_prf_sha384( const unsigned char *secret, size_t slen,
nexpaq	0:6c56fb4bc5f0	445	const char *label,
nexpaq	0:6c56fb4bc5f0	446	const unsigned char *random, size_t rlen,
nexpaq	0:6c56fb4bc5f0	447	unsigned char *dstbuf, size_t dlen )
nexpaq	0:6c56fb4bc5f0	448	{
nexpaq	0:6c56fb4bc5f0	449	return( tls_prf_generic( MBEDTLS_MD_SHA384, secret, slen,
nexpaq	0:6c56fb4bc5f0	450	label, random, rlen, dstbuf, dlen ) );
nexpaq	0:6c56fb4bc5f0	451	}
nexpaq	0:6c56fb4bc5f0	452	#endif /* MBEDTLS_SHA512_C */
nexpaq	0:6c56fb4bc5f0	453	#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
nexpaq	0:6c56fb4bc5f0	454
nexpaq	0:6c56fb4bc5f0	455	static void ssl_update_checksum_start( mbedtls_ssl_context , const unsigned char , size_t );
nexpaq	0:6c56fb4bc5f0	456
nexpaq	0:6c56fb4bc5f0	457	#if defined(MBEDTLS_SSL_PROTO_SSL3) \|\| defined(MBEDTLS_SSL_PROTO_TLS1) \|\| \
nexpaq	0:6c56fb4bc5f0	458	defined(MBEDTLS_SSL_PROTO_TLS1_1)
nexpaq	0:6c56fb4bc5f0	459	static void ssl_update_checksum_md5sha1( mbedtls_ssl_context , const unsigned char , size_t );
nexpaq	0:6c56fb4bc5f0	460	#endif
nexpaq	0:6c56fb4bc5f0	461
nexpaq	0:6c56fb4bc5f0	462	#if defined(MBEDTLS_SSL_PROTO_SSL3)
nexpaq	0:6c56fb4bc5f0	463	static void ssl_calc_verify_ssl( mbedtls_ssl_context , unsigned char );
nexpaq	0:6c56fb4bc5f0	464	static void ssl_calc_finished_ssl( mbedtls_ssl_context , unsigned char , int );
nexpaq	0:6c56fb4bc5f0	465	#endif
nexpaq	0:6c56fb4bc5f0	466
nexpaq	0:6c56fb4bc5f0	467	#if defined(MBEDTLS_SSL_PROTO_TLS1) \|\| defined(MBEDTLS_SSL_PROTO_TLS1_1)
nexpaq	0:6c56fb4bc5f0	468	static void ssl_calc_verify_tls( mbedtls_ssl_context , unsigned char );
nexpaq	0:6c56fb4bc5f0	469	static void ssl_calc_finished_tls( mbedtls_ssl_context , unsigned char , int );
nexpaq	0:6c56fb4bc5f0	470	#endif
nexpaq	0:6c56fb4bc5f0	471
nexpaq	0:6c56fb4bc5f0	472	#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
nexpaq	0:6c56fb4bc5f0	473	#if defined(MBEDTLS_SHA256_C)
nexpaq	0:6c56fb4bc5f0	474	static void ssl_update_checksum_sha256( mbedtls_ssl_context , const unsigned char , size_t );
nexpaq	0:6c56fb4bc5f0	475	static void ssl_calc_verify_tls_sha256( mbedtls_ssl_context ,unsigned char );
nexpaq	0:6c56fb4bc5f0	476	static void ssl_calc_finished_tls_sha256( mbedtls_ssl_context ,unsigned char , int );
nexpaq	0:6c56fb4bc5f0	477	#endif
nexpaq	0:6c56fb4bc5f0	478
nexpaq	0:6c56fb4bc5f0	479	#if defined(MBEDTLS_SHA512_C)
nexpaq	0:6c56fb4bc5f0	480	static void ssl_update_checksum_sha384( mbedtls_ssl_context , const unsigned char , size_t );
nexpaq	0:6c56fb4bc5f0	481	static void ssl_calc_verify_tls_sha384( mbedtls_ssl_context , unsigned char );
nexpaq	0:6c56fb4bc5f0	482	static void ssl_calc_finished_tls_sha384( mbedtls_ssl_context , unsigned char , int );
nexpaq	0:6c56fb4bc5f0	483	#endif
nexpaq	0:6c56fb4bc5f0	484	#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
nexpaq	0:6c56fb4bc5f0	485
nexpaq	0:6c56fb4bc5f0	486	int mbedtls_ssl_derive_keys( mbedtls_ssl_context *ssl )
nexpaq	0:6c56fb4bc5f0	487	{
nexpaq	0:6c56fb4bc5f0	488	int ret = 0;
nexpaq	0:6c56fb4bc5f0	489	unsigned char tmp[64];
nexpaq	0:6c56fb4bc5f0	490	unsigned char keyblk[256];
nexpaq	0:6c56fb4bc5f0	491	unsigned char *key1;
nexpaq	0:6c56fb4bc5f0	492	unsigned char *key2;
nexpaq	0:6c56fb4bc5f0	493	unsigned char *mac_enc;
nexpaq	0:6c56fb4bc5f0	494	unsigned char *mac_dec;
nexpaq	0:6c56fb4bc5f0	495	size_t iv_copy_len;
nexpaq	0:6c56fb4bc5f0	496	const mbedtls_cipher_info_t *cipher_info;
nexpaq	0:6c56fb4bc5f0	497	const mbedtls_md_info_t *md_info;
nexpaq	0:6c56fb4bc5f0	498
nexpaq	0:6c56fb4bc5f0	499	mbedtls_ssl_session *session = ssl->session_negotiate;
nexpaq	0:6c56fb4bc5f0	500	mbedtls_ssl_transform *transform = ssl->transform_negotiate;
nexpaq	0:6c56fb4bc5f0	501	mbedtls_ssl_handshake_params *handshake = ssl->handshake;
nexpaq	0:6c56fb4bc5f0	502
nexpaq	0:6c56fb4bc5f0	503	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> derive keys" ) );
nexpaq	0:6c56fb4bc5f0	504
nexpaq	0:6c56fb4bc5f0	505	cipher_info = mbedtls_cipher_info_from_type( transform->ciphersuite_info->cipher );
nexpaq	0:6c56fb4bc5f0	506	if( cipher_info == NULL )
nexpaq	0:6c56fb4bc5f0	507	{
nexpaq	0:6c56fb4bc5f0	508	MBEDTLS_SSL_DEBUG_MSG( 1, ( "cipher info for %d not found",
nexpaq	0:6c56fb4bc5f0	509	transform->ciphersuite_info->cipher ) );
nexpaq	0:6c56fb4bc5f0	510	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
nexpaq	0:6c56fb4bc5f0	511	}
nexpaq	0:6c56fb4bc5f0	512
nexpaq	0:6c56fb4bc5f0	513	md_info = mbedtls_md_info_from_type( transform->ciphersuite_info->mac );
nexpaq	0:6c56fb4bc5f0	514	if( md_info == NULL )
nexpaq	0:6c56fb4bc5f0	515	{
nexpaq	0:6c56fb4bc5f0	516	MBEDTLS_SSL_DEBUG_MSG( 1, ( "mbedtls_md info for %d not found",
nexpaq	0:6c56fb4bc5f0	517	transform->ciphersuite_info->mac ) );
nexpaq	0:6c56fb4bc5f0	518	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
nexpaq	0:6c56fb4bc5f0	519	}
nexpaq	0:6c56fb4bc5f0	520
nexpaq	0:6c56fb4bc5f0	521	/*
nexpaq	0:6c56fb4bc5f0	522	* Set appropriate PRF function and other SSL / TLS / TLS1.2 functions
nexpaq	0:6c56fb4bc5f0	523	*/
nexpaq	0:6c56fb4bc5f0	524	#if defined(MBEDTLS_SSL_PROTO_SSL3)
nexpaq	0:6c56fb4bc5f0	525	if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 )
nexpaq	0:6c56fb4bc5f0	526	{
nexpaq	0:6c56fb4bc5f0	527	handshake->tls_prf = ssl3_prf;
nexpaq	0:6c56fb4bc5f0	528	handshake->calc_verify = ssl_calc_verify_ssl;
nexpaq	0:6c56fb4bc5f0	529	handshake->calc_finished = ssl_calc_finished_ssl;
nexpaq	0:6c56fb4bc5f0	530	}
nexpaq	0:6c56fb4bc5f0	531	else
nexpaq	0:6c56fb4bc5f0	532	#endif
nexpaq	0:6c56fb4bc5f0	533	#if defined(MBEDTLS_SSL_PROTO_TLS1) \|\| defined(MBEDTLS_SSL_PROTO_TLS1_1)
nexpaq	0:6c56fb4bc5f0	534	if( ssl->minor_ver < MBEDTLS_SSL_MINOR_VERSION_3 )
nexpaq	0:6c56fb4bc5f0	535	{
nexpaq	0:6c56fb4bc5f0	536	handshake->tls_prf = tls1_prf;
nexpaq	0:6c56fb4bc5f0	537	handshake->calc_verify = ssl_calc_verify_tls;
nexpaq	0:6c56fb4bc5f0	538	handshake->calc_finished = ssl_calc_finished_tls;
nexpaq	0:6c56fb4bc5f0	539	}
nexpaq	0:6c56fb4bc5f0	540	else
nexpaq	0:6c56fb4bc5f0	541	#endif
nexpaq	0:6c56fb4bc5f0	542	#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
nexpaq	0:6c56fb4bc5f0	543	#if defined(MBEDTLS_SHA512_C)
nexpaq	0:6c56fb4bc5f0	544	if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_3 &&
nexpaq	0:6c56fb4bc5f0	545	transform->ciphersuite_info->mac == MBEDTLS_MD_SHA384 )
nexpaq	0:6c56fb4bc5f0	546	{
nexpaq	0:6c56fb4bc5f0	547	handshake->tls_prf = tls_prf_sha384;
nexpaq	0:6c56fb4bc5f0	548	handshake->calc_verify = ssl_calc_verify_tls_sha384;
nexpaq	0:6c56fb4bc5f0	549	handshake->calc_finished = ssl_calc_finished_tls_sha384;
nexpaq	0:6c56fb4bc5f0	550	}
nexpaq	0:6c56fb4bc5f0	551	else
nexpaq	0:6c56fb4bc5f0	552	#endif
nexpaq	0:6c56fb4bc5f0	553	#if defined(MBEDTLS_SHA256_C)
nexpaq	0:6c56fb4bc5f0	554	if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_3 )
nexpaq	0:6c56fb4bc5f0	555	{
nexpaq	0:6c56fb4bc5f0	556	handshake->tls_prf = tls_prf_sha256;
nexpaq	0:6c56fb4bc5f0	557	handshake->calc_verify = ssl_calc_verify_tls_sha256;
nexpaq	0:6c56fb4bc5f0	558	handshake->calc_finished = ssl_calc_finished_tls_sha256;
nexpaq	0:6c56fb4bc5f0	559	}
nexpaq	0:6c56fb4bc5f0	560	else
nexpaq	0:6c56fb4bc5f0	561	#endif
nexpaq	0:6c56fb4bc5f0	562	#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
nexpaq	0:6c56fb4bc5f0	563	{
nexpaq	0:6c56fb4bc5f0	564	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
nexpaq	0:6c56fb4bc5f0	565	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
nexpaq	0:6c56fb4bc5f0	566	}
nexpaq	0:6c56fb4bc5f0	567
nexpaq	0:6c56fb4bc5f0	568	/*
nexpaq	0:6c56fb4bc5f0	569	* SSLv3:
nexpaq	0:6c56fb4bc5f0	570	* master =
nexpaq	0:6c56fb4bc5f0	571	* MD5( premaster + SHA1( 'A' + premaster + randbytes ) ) +
nexpaq	0:6c56fb4bc5f0	572	* MD5( premaster + SHA1( 'BB' + premaster + randbytes ) ) +
nexpaq	0:6c56fb4bc5f0	573	* MD5( premaster + SHA1( 'CCC' + premaster + randbytes ) )
nexpaq	0:6c56fb4bc5f0	574	*
nexpaq	0:6c56fb4bc5f0	575	* TLSv1+:
nexpaq	0:6c56fb4bc5f0	576	* master = PRF( premaster, "master secret", randbytes )[0..47]
nexpaq	0:6c56fb4bc5f0	577	*/
nexpaq	0:6c56fb4bc5f0	578	if( handshake->resume == 0 )
nexpaq	0:6c56fb4bc5f0	579	{
nexpaq	0:6c56fb4bc5f0	580	MBEDTLS_SSL_DEBUG_BUF( 3, "premaster secret", handshake->premaster,
nexpaq	0:6c56fb4bc5f0	581	handshake->pmslen );
nexpaq	0:6c56fb4bc5f0	582
nexpaq	0:6c56fb4bc5f0	583	#if defined(MBEDTLS_SSL_EXTENDED_MASTER_SECRET)
nexpaq	0:6c56fb4bc5f0	584	if( ssl->handshake->extended_ms == MBEDTLS_SSL_EXTENDED_MS_ENABLED )
nexpaq	0:6c56fb4bc5f0	585	{
nexpaq	0:6c56fb4bc5f0	586	unsigned char session_hash[48];
nexpaq	0:6c56fb4bc5f0	587	size_t hash_len;
nexpaq	0:6c56fb4bc5f0	588
nexpaq	0:6c56fb4bc5f0	589	MBEDTLS_SSL_DEBUG_MSG( 3, ( "using extended master secret" ) );
nexpaq	0:6c56fb4bc5f0	590
nexpaq	0:6c56fb4bc5f0	591	ssl->handshake->calc_verify( ssl, session_hash );
nexpaq	0:6c56fb4bc5f0	592
nexpaq	0:6c56fb4bc5f0	593	#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
nexpaq	0:6c56fb4bc5f0	594	if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_3 )
nexpaq	0:6c56fb4bc5f0	595	{
nexpaq	0:6c56fb4bc5f0	596	#if defined(MBEDTLS_SHA512_C)
nexpaq	0:6c56fb4bc5f0	597	if( ssl->transform_negotiate->ciphersuite_info->mac ==
nexpaq	0:6c56fb4bc5f0	598	MBEDTLS_MD_SHA384 )
nexpaq	0:6c56fb4bc5f0	599	{
nexpaq	0:6c56fb4bc5f0	600	hash_len = 48;
nexpaq	0:6c56fb4bc5f0	601	}
nexpaq	0:6c56fb4bc5f0	602	else
nexpaq	0:6c56fb4bc5f0	603	#endif
nexpaq	0:6c56fb4bc5f0	604	hash_len = 32;
nexpaq	0:6c56fb4bc5f0	605	}
nexpaq	0:6c56fb4bc5f0	606	else
nexpaq	0:6c56fb4bc5f0	607	#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
nexpaq	0:6c56fb4bc5f0	608	hash_len = 36;
nexpaq	0:6c56fb4bc5f0	609
nexpaq	0:6c56fb4bc5f0	610	MBEDTLS_SSL_DEBUG_BUF( 3, "session hash", session_hash, hash_len );
nexpaq	0:6c56fb4bc5f0	611
nexpaq	0:6c56fb4bc5f0	612	ret = handshake->tls_prf( handshake->premaster, handshake->pmslen,
nexpaq	0:6c56fb4bc5f0	613	"extended master secret",
nexpaq	0:6c56fb4bc5f0	614	session_hash, hash_len,
nexpaq	0:6c56fb4bc5f0	615	session->master, 48 );
nexpaq	0:6c56fb4bc5f0	616	if( ret != 0 )
nexpaq	0:6c56fb4bc5f0	617	{
nexpaq	0:6c56fb4bc5f0	618	MBEDTLS_SSL_DEBUG_RET( 1, "prf", ret );
nexpaq	0:6c56fb4bc5f0	619	return( ret );
nexpaq	0:6c56fb4bc5f0	620	}
nexpaq	0:6c56fb4bc5f0	621
nexpaq	0:6c56fb4bc5f0	622	}
nexpaq	0:6c56fb4bc5f0	623	else
nexpaq	0:6c56fb4bc5f0	624	#endif
nexpaq	0:6c56fb4bc5f0	625	ret = handshake->tls_prf( handshake->premaster, handshake->pmslen,
nexpaq	0:6c56fb4bc5f0	626	"master secret",
nexpaq	0:6c56fb4bc5f0	627	handshake->randbytes, 64,
nexpaq	0:6c56fb4bc5f0	628	session->master, 48 );
nexpaq	0:6c56fb4bc5f0	629	if( ret != 0 )
nexpaq	0:6c56fb4bc5f0	630	{
nexpaq	0:6c56fb4bc5f0	631	MBEDTLS_SSL_DEBUG_RET( 1, "prf", ret );
nexpaq	0:6c56fb4bc5f0	632	return( ret );
nexpaq	0:6c56fb4bc5f0	633	}
nexpaq	0:6c56fb4bc5f0	634
nexpaq	0:6c56fb4bc5f0	635	mbedtls_zeroize( handshake->premaster, sizeof(handshake->premaster) );
nexpaq	0:6c56fb4bc5f0	636	}
nexpaq	0:6c56fb4bc5f0	637	else
nexpaq	0:6c56fb4bc5f0	638	MBEDTLS_SSL_DEBUG_MSG( 3, ( "no premaster (session resumed)" ) );
nexpaq	0:6c56fb4bc5f0	639
nexpaq	0:6c56fb4bc5f0	640	/*
nexpaq	0:6c56fb4bc5f0	641	* Swap the client and server random values.
nexpaq	0:6c56fb4bc5f0	642	*/
nexpaq	0:6c56fb4bc5f0	643	memcpy( tmp, handshake->randbytes, 64 );
nexpaq	0:6c56fb4bc5f0	644	memcpy( handshake->randbytes, tmp + 32, 32 );
nexpaq	0:6c56fb4bc5f0	645	memcpy( handshake->randbytes + 32, tmp, 32 );
nexpaq	0:6c56fb4bc5f0	646	mbedtls_zeroize( tmp, sizeof( tmp ) );
nexpaq	0:6c56fb4bc5f0	647
nexpaq	0:6c56fb4bc5f0	648	/*
nexpaq	0:6c56fb4bc5f0	649	* SSLv3:
nexpaq	0:6c56fb4bc5f0	650	* key block =
nexpaq	0:6c56fb4bc5f0	651	* MD5( master + SHA1( 'A' + master + randbytes ) ) +
nexpaq	0:6c56fb4bc5f0	652	* MD5( master + SHA1( 'BB' + master + randbytes ) ) +
nexpaq	0:6c56fb4bc5f0	653	* MD5( master + SHA1( 'CCC' + master + randbytes ) ) +
nexpaq	0:6c56fb4bc5f0	654	* MD5( master + SHA1( 'DDDD' + master + randbytes ) ) +
nexpaq	0:6c56fb4bc5f0	655	* ...
nexpaq	0:6c56fb4bc5f0	656	*
nexpaq	0:6c56fb4bc5f0	657	* TLSv1:
nexpaq	0:6c56fb4bc5f0	658	* key block = PRF( master, "key expansion", randbytes )
nexpaq	0:6c56fb4bc5f0	659	*/
nexpaq	0:6c56fb4bc5f0	660	ret = handshake->tls_prf( session->master, 48, "key expansion",
nexpaq	0:6c56fb4bc5f0	661	handshake->randbytes, 64, keyblk, 256 );
nexpaq	0:6c56fb4bc5f0	662	if( ret != 0 )
nexpaq	0:6c56fb4bc5f0	663	{
nexpaq	0:6c56fb4bc5f0	664	MBEDTLS_SSL_DEBUG_RET( 1, "prf", ret );
nexpaq	0:6c56fb4bc5f0	665	return( ret );
nexpaq	0:6c56fb4bc5f0	666	}
nexpaq	0:6c56fb4bc5f0	667
nexpaq	0:6c56fb4bc5f0	668	MBEDTLS_SSL_DEBUG_MSG( 3, ( "ciphersuite = %s",
nexpaq	0:6c56fb4bc5f0	669	mbedtls_ssl_get_ciphersuite_name( session->ciphersuite ) ) );
nexpaq	0:6c56fb4bc5f0	670	MBEDTLS_SSL_DEBUG_BUF( 3, "master secret", session->master, 48 );
nexpaq	0:6c56fb4bc5f0	671	MBEDTLS_SSL_DEBUG_BUF( 4, "random bytes", handshake->randbytes, 64 );
nexpaq	0:6c56fb4bc5f0	672	MBEDTLS_SSL_DEBUG_BUF( 4, "key block", keyblk, 256 );
nexpaq	0:6c56fb4bc5f0	673
nexpaq	0:6c56fb4bc5f0	674	mbedtls_zeroize( handshake->randbytes, sizeof( handshake->randbytes ) );
nexpaq	0:6c56fb4bc5f0	675
nexpaq	0:6c56fb4bc5f0	676	/*
nexpaq	0:6c56fb4bc5f0	677	* Determine the appropriate key, IV and MAC length.
nexpaq	0:6c56fb4bc5f0	678	*/
nexpaq	0:6c56fb4bc5f0	679
nexpaq	0:6c56fb4bc5f0	680	transform->keylen = cipher_info->key_bitlen / 8;
nexpaq	0:6c56fb4bc5f0	681
nexpaq	0:6c56fb4bc5f0	682	if( cipher_info->mode == MBEDTLS_MODE_GCM \|\|
nexpaq	0:6c56fb4bc5f0	683	cipher_info->mode == MBEDTLS_MODE_CCM )
nexpaq	0:6c56fb4bc5f0	684	{
nexpaq	0:6c56fb4bc5f0	685	transform->maclen = 0;
nexpaq	0:6c56fb4bc5f0	686
nexpaq	0:6c56fb4bc5f0	687	transform->ivlen = 12;
nexpaq	0:6c56fb4bc5f0	688	transform->fixed_ivlen = 4;
nexpaq	0:6c56fb4bc5f0	689
nexpaq	0:6c56fb4bc5f0	690	/* Minimum length is expicit IV + tag */
nexpaq	0:6c56fb4bc5f0	691	transform->minlen = transform->ivlen - transform->fixed_ivlen
nexpaq	0:6c56fb4bc5f0	692	+ ( transform->ciphersuite_info->flags &
nexpaq	0:6c56fb4bc5f0	693	MBEDTLS_CIPHERSUITE_SHORT_TAG ? 8 : 16 );
nexpaq	0:6c56fb4bc5f0	694	}
nexpaq	0:6c56fb4bc5f0	695	else
nexpaq	0:6c56fb4bc5f0	696	{
nexpaq	0:6c56fb4bc5f0	697	/* Initialize HMAC contexts */
nexpaq	0:6c56fb4bc5f0	698	if( ( ret = mbedtls_md_setup( &transform->md_ctx_enc, md_info, 1 ) ) != 0 \|\|
nexpaq	0:6c56fb4bc5f0	699	( ret = mbedtls_md_setup( &transform->md_ctx_dec, md_info, 1 ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	700	{
nexpaq	0:6c56fb4bc5f0	701	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_md_setup", ret );
nexpaq	0:6c56fb4bc5f0	702	return( ret );
nexpaq	0:6c56fb4bc5f0	703	}
nexpaq	0:6c56fb4bc5f0	704
nexpaq	0:6c56fb4bc5f0	705	/* Get MAC length */
nexpaq	0:6c56fb4bc5f0	706	transform->maclen = mbedtls_md_get_size( md_info );
nexpaq	0:6c56fb4bc5f0	707
nexpaq	0:6c56fb4bc5f0	708	#if defined(MBEDTLS_SSL_TRUNCATED_HMAC)
nexpaq	0:6c56fb4bc5f0	709	/*
nexpaq	0:6c56fb4bc5f0	710	* If HMAC is to be truncated, we shall keep the leftmost bytes,
nexpaq	0:6c56fb4bc5f0	711	* (rfc 6066 page 13 or rfc 2104 section 4),
nexpaq	0:6c56fb4bc5f0	712	* so we only need to adjust the length here.
nexpaq	0:6c56fb4bc5f0	713	*/
nexpaq	0:6c56fb4bc5f0	714	if( session->trunc_hmac == MBEDTLS_SSL_TRUNC_HMAC_ENABLED )
nexpaq	0:6c56fb4bc5f0	715	transform->maclen = MBEDTLS_SSL_TRUNCATED_HMAC_LEN;
nexpaq	0:6c56fb4bc5f0	716	#endif /* MBEDTLS_SSL_TRUNCATED_HMAC */
nexpaq	0:6c56fb4bc5f0	717
nexpaq	0:6c56fb4bc5f0	718	/* IV length */
nexpaq	0:6c56fb4bc5f0	719	transform->ivlen = cipher_info->iv_size;
nexpaq	0:6c56fb4bc5f0	720
nexpaq	0:6c56fb4bc5f0	721	/* Minimum length */
nexpaq	0:6c56fb4bc5f0	722	if( cipher_info->mode == MBEDTLS_MODE_STREAM )
nexpaq	0:6c56fb4bc5f0	723	transform->minlen = transform->maclen;
nexpaq	0:6c56fb4bc5f0	724	else
nexpaq	0:6c56fb4bc5f0	725	{
nexpaq	0:6c56fb4bc5f0	726	/*
nexpaq	0:6c56fb4bc5f0	727	* GenericBlockCipher:
nexpaq	0:6c56fb4bc5f0	728	* 1. if EtM is in use: one block plus MAC
nexpaq	0:6c56fb4bc5f0	729	* otherwise: * first multiple of blocklen greater than maclen
nexpaq	0:6c56fb4bc5f0	730	* 2. IV except for SSL3 and TLS 1.0
nexpaq	0:6c56fb4bc5f0	731	*/
nexpaq	0:6c56fb4bc5f0	732	#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
nexpaq	0:6c56fb4bc5f0	733	if( session->encrypt_then_mac == MBEDTLS_SSL_ETM_ENABLED )
nexpaq	0:6c56fb4bc5f0	734	{
nexpaq	0:6c56fb4bc5f0	735	transform->minlen = transform->maclen
nexpaq	0:6c56fb4bc5f0	736	+ cipher_info->block_size;
nexpaq	0:6c56fb4bc5f0	737	}
nexpaq	0:6c56fb4bc5f0	738	else
nexpaq	0:6c56fb4bc5f0	739	#endif
nexpaq	0:6c56fb4bc5f0	740	{
nexpaq	0:6c56fb4bc5f0	741	transform->minlen = transform->maclen
nexpaq	0:6c56fb4bc5f0	742	+ cipher_info->block_size
nexpaq	0:6c56fb4bc5f0	743	- transform->maclen % cipher_info->block_size;
nexpaq	0:6c56fb4bc5f0	744	}
nexpaq	0:6c56fb4bc5f0	745
nexpaq	0:6c56fb4bc5f0	746	#if defined(MBEDTLS_SSL_PROTO_SSL3) \|\| defined(MBEDTLS_SSL_PROTO_TLS1)
nexpaq	0:6c56fb4bc5f0	747	if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 \|\|
nexpaq	0:6c56fb4bc5f0	748	ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_1 )
nexpaq	0:6c56fb4bc5f0	749	; /* No need to adjust minlen */
nexpaq	0:6c56fb4bc5f0	750	else
nexpaq	0:6c56fb4bc5f0	751	#endif
nexpaq	0:6c56fb4bc5f0	752	#if defined(MBEDTLS_SSL_PROTO_TLS1_1) \|\| defined(MBEDTLS_SSL_PROTO_TLS1_2)
nexpaq	0:6c56fb4bc5f0	753	if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_2 \|\|
nexpaq	0:6c56fb4bc5f0	754	ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_3 )
nexpaq	0:6c56fb4bc5f0	755	{
nexpaq	0:6c56fb4bc5f0	756	transform->minlen += transform->ivlen;
nexpaq	0:6c56fb4bc5f0	757	}
nexpaq	0:6c56fb4bc5f0	758	else
nexpaq	0:6c56fb4bc5f0	759	#endif
nexpaq	0:6c56fb4bc5f0	760	{
nexpaq	0:6c56fb4bc5f0	761	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
nexpaq	0:6c56fb4bc5f0	762	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
nexpaq	0:6c56fb4bc5f0	763	}
nexpaq	0:6c56fb4bc5f0	764	}
nexpaq	0:6c56fb4bc5f0	765	}
nexpaq	0:6c56fb4bc5f0	766
nexpaq	0:6c56fb4bc5f0	767	MBEDTLS_SSL_DEBUG_MSG( 3, ( "keylen: %d, minlen: %d, ivlen: %d, maclen: %d",
nexpaq	0:6c56fb4bc5f0	768	transform->keylen, transform->minlen, transform->ivlen,
nexpaq	0:6c56fb4bc5f0	769	transform->maclen ) );
nexpaq	0:6c56fb4bc5f0	770
nexpaq	0:6c56fb4bc5f0	771	/*
nexpaq	0:6c56fb4bc5f0	772	* Finally setup the cipher contexts, IVs and MAC secrets.
nexpaq	0:6c56fb4bc5f0	773	*/
nexpaq	0:6c56fb4bc5f0	774	#if defined(MBEDTLS_SSL_CLI_C)
nexpaq	0:6c56fb4bc5f0	775	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_CLIENT )
nexpaq	0:6c56fb4bc5f0	776	{
nexpaq	0:6c56fb4bc5f0	777	key1 = keyblk + transform->maclen * 2;
nexpaq	0:6c56fb4bc5f0	778	key2 = keyblk + transform->maclen * 2 + transform->keylen;
nexpaq	0:6c56fb4bc5f0	779
nexpaq	0:6c56fb4bc5f0	780	mac_enc = keyblk;
nexpaq	0:6c56fb4bc5f0	781	mac_dec = keyblk + transform->maclen;
nexpaq	0:6c56fb4bc5f0	782
nexpaq	0:6c56fb4bc5f0	783	/*
nexpaq	0:6c56fb4bc5f0	784	* This is not used in TLS v1.1.
nexpaq	0:6c56fb4bc5f0	785	*/
nexpaq	0:6c56fb4bc5f0	786	iv_copy_len = ( transform->fixed_ivlen ) ?
nexpaq	0:6c56fb4bc5f0	787	transform->fixed_ivlen : transform->ivlen;
nexpaq	0:6c56fb4bc5f0	788	memcpy( transform->iv_enc, key2 + transform->keylen, iv_copy_len );
nexpaq	0:6c56fb4bc5f0	789	memcpy( transform->iv_dec, key2 + transform->keylen + iv_copy_len,
nexpaq	0:6c56fb4bc5f0	790	iv_copy_len );
nexpaq	0:6c56fb4bc5f0	791	}
nexpaq	0:6c56fb4bc5f0	792	else
nexpaq	0:6c56fb4bc5f0	793	#endif /* MBEDTLS_SSL_CLI_C */
nexpaq	0:6c56fb4bc5f0	794	#if defined(MBEDTLS_SSL_SRV_C)
nexpaq	0:6c56fb4bc5f0	795	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER )
nexpaq	0:6c56fb4bc5f0	796	{
nexpaq	0:6c56fb4bc5f0	797	key1 = keyblk + transform->maclen * 2 + transform->keylen;
nexpaq	0:6c56fb4bc5f0	798	key2 = keyblk + transform->maclen * 2;
nexpaq	0:6c56fb4bc5f0	799
nexpaq	0:6c56fb4bc5f0	800	mac_enc = keyblk + transform->maclen;
nexpaq	0:6c56fb4bc5f0	801	mac_dec = keyblk;
nexpaq	0:6c56fb4bc5f0	802
nexpaq	0:6c56fb4bc5f0	803	/*
nexpaq	0:6c56fb4bc5f0	804	* This is not used in TLS v1.1.
nexpaq	0:6c56fb4bc5f0	805	*/
nexpaq	0:6c56fb4bc5f0	806	iv_copy_len = ( transform->fixed_ivlen ) ?
nexpaq	0:6c56fb4bc5f0	807	transform->fixed_ivlen : transform->ivlen;
nexpaq	0:6c56fb4bc5f0	808	memcpy( transform->iv_dec, key1 + transform->keylen, iv_copy_len );
nexpaq	0:6c56fb4bc5f0	809	memcpy( transform->iv_enc, key1 + transform->keylen + iv_copy_len,
nexpaq	0:6c56fb4bc5f0	810	iv_copy_len );
nexpaq	0:6c56fb4bc5f0	811	}
nexpaq	0:6c56fb4bc5f0	812	else
nexpaq	0:6c56fb4bc5f0	813	#endif /* MBEDTLS_SSL_SRV_C */
nexpaq	0:6c56fb4bc5f0	814	{
nexpaq	0:6c56fb4bc5f0	815	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
nexpaq	0:6c56fb4bc5f0	816	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
nexpaq	0:6c56fb4bc5f0	817	}
nexpaq	0:6c56fb4bc5f0	818
nexpaq	0:6c56fb4bc5f0	819	#if defined(MBEDTLS_SSL_PROTO_SSL3)
nexpaq	0:6c56fb4bc5f0	820	if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 )
nexpaq	0:6c56fb4bc5f0	821	{
nexpaq	0:6c56fb4bc5f0	822	if( transform->maclen > sizeof transform->mac_enc )
nexpaq	0:6c56fb4bc5f0	823	{
nexpaq	0:6c56fb4bc5f0	824	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
nexpaq	0:6c56fb4bc5f0	825	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
nexpaq	0:6c56fb4bc5f0	826	}
nexpaq	0:6c56fb4bc5f0	827
nexpaq	0:6c56fb4bc5f0	828	memcpy( transform->mac_enc, mac_enc, transform->maclen );
nexpaq	0:6c56fb4bc5f0	829	memcpy( transform->mac_dec, mac_dec, transform->maclen );
nexpaq	0:6c56fb4bc5f0	830	}
nexpaq	0:6c56fb4bc5f0	831	else
nexpaq	0:6c56fb4bc5f0	832	#endif /* MBEDTLS_SSL_PROTO_SSL3 */
nexpaq	0:6c56fb4bc5f0	833	#if defined(MBEDTLS_SSL_PROTO_TLS1) \|\| defined(MBEDTLS_SSL_PROTO_TLS1_1) \|\| \
nexpaq	0:6c56fb4bc5f0	834	defined(MBEDTLS_SSL_PROTO_TLS1_2)
nexpaq	0:6c56fb4bc5f0	835	if( ssl->minor_ver >= MBEDTLS_SSL_MINOR_VERSION_1 )
nexpaq	0:6c56fb4bc5f0	836	{
nexpaq	0:6c56fb4bc5f0	837	mbedtls_md_hmac_starts( &transform->md_ctx_enc, mac_enc, transform->maclen );
nexpaq	0:6c56fb4bc5f0	838	mbedtls_md_hmac_starts( &transform->md_ctx_dec, mac_dec, transform->maclen );
nexpaq	0:6c56fb4bc5f0	839	}
nexpaq	0:6c56fb4bc5f0	840	else
nexpaq	0:6c56fb4bc5f0	841	#endif
nexpaq	0:6c56fb4bc5f0	842	{
nexpaq	0:6c56fb4bc5f0	843	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
nexpaq	0:6c56fb4bc5f0	844	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
nexpaq	0:6c56fb4bc5f0	845	}
nexpaq	0:6c56fb4bc5f0	846
nexpaq	0:6c56fb4bc5f0	847	#if defined(MBEDTLS_SSL_HW_RECORD_ACCEL)
nexpaq	0:6c56fb4bc5f0	848	if( mbedtls_ssl_hw_record_init != NULL )
nexpaq	0:6c56fb4bc5f0	849	{
nexpaq	0:6c56fb4bc5f0	850	int ret = 0;
nexpaq	0:6c56fb4bc5f0	851
nexpaq	0:6c56fb4bc5f0	852	MBEDTLS_SSL_DEBUG_MSG( 2, ( "going for mbedtls_ssl_hw_record_init()" ) );
nexpaq	0:6c56fb4bc5f0	853
nexpaq	0:6c56fb4bc5f0	854	if( ( ret = mbedtls_ssl_hw_record_init( ssl, key1, key2, transform->keylen,
nexpaq	0:6c56fb4bc5f0	855	transform->iv_enc, transform->iv_dec,
nexpaq	0:6c56fb4bc5f0	856	iv_copy_len,
nexpaq	0:6c56fb4bc5f0	857	mac_enc, mac_dec,
nexpaq	0:6c56fb4bc5f0	858	transform->maclen ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	859	{
nexpaq	0:6c56fb4bc5f0	860	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_hw_record_init", ret );
nexpaq	0:6c56fb4bc5f0	861	return( MBEDTLS_ERR_SSL_HW_ACCEL_FAILED );
nexpaq	0:6c56fb4bc5f0	862	}
nexpaq	0:6c56fb4bc5f0	863	}
nexpaq	0:6c56fb4bc5f0	864	#endif /* MBEDTLS_SSL_HW_RECORD_ACCEL */
nexpaq	0:6c56fb4bc5f0	865
nexpaq	0:6c56fb4bc5f0	866	#if defined(MBEDTLS_SSL_EXPORT_KEYS)
nexpaq	0:6c56fb4bc5f0	867	if( ssl->conf->f_export_keys != NULL )
nexpaq	0:6c56fb4bc5f0	868	{
nexpaq	0:6c56fb4bc5f0	869	ssl->conf->f_export_keys( ssl->conf->p_export_keys,
nexpaq	0:6c56fb4bc5f0	870	session->master, keyblk,
nexpaq	0:6c56fb4bc5f0	871	transform->maclen, transform->keylen,
nexpaq	0:6c56fb4bc5f0	872	iv_copy_len );
nexpaq	0:6c56fb4bc5f0	873	}
nexpaq	0:6c56fb4bc5f0	874	#endif
nexpaq	0:6c56fb4bc5f0	875
nexpaq	0:6c56fb4bc5f0	876	if( ( ret = mbedtls_cipher_setup( &transform->cipher_ctx_enc,
nexpaq	0:6c56fb4bc5f0	877	cipher_info ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	878	{
nexpaq	0:6c56fb4bc5f0	879	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_cipher_setup", ret );
nexpaq	0:6c56fb4bc5f0	880	return( ret );
nexpaq	0:6c56fb4bc5f0	881	}
nexpaq	0:6c56fb4bc5f0	882
nexpaq	0:6c56fb4bc5f0	883	if( ( ret = mbedtls_cipher_setup( &transform->cipher_ctx_dec,
nexpaq	0:6c56fb4bc5f0	884	cipher_info ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	885	{
nexpaq	0:6c56fb4bc5f0	886	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_cipher_setup", ret );
nexpaq	0:6c56fb4bc5f0	887	return( ret );
nexpaq	0:6c56fb4bc5f0	888	}
nexpaq	0:6c56fb4bc5f0	889
nexpaq	0:6c56fb4bc5f0	890	if( ( ret = mbedtls_cipher_setkey( &transform->cipher_ctx_enc, key1,
nexpaq	0:6c56fb4bc5f0	891	cipher_info->key_bitlen,
nexpaq	0:6c56fb4bc5f0	892	MBEDTLS_ENCRYPT ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	893	{
nexpaq	0:6c56fb4bc5f0	894	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_cipher_setkey", ret );
nexpaq	0:6c56fb4bc5f0	895	return( ret );
nexpaq	0:6c56fb4bc5f0	896	}
nexpaq	0:6c56fb4bc5f0	897
nexpaq	0:6c56fb4bc5f0	898	if( ( ret = mbedtls_cipher_setkey( &transform->cipher_ctx_dec, key2,
nexpaq	0:6c56fb4bc5f0	899	cipher_info->key_bitlen,
nexpaq	0:6c56fb4bc5f0	900	MBEDTLS_DECRYPT ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	901	{
nexpaq	0:6c56fb4bc5f0	902	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_cipher_setkey", ret );
nexpaq	0:6c56fb4bc5f0	903	return( ret );
nexpaq	0:6c56fb4bc5f0	904	}
nexpaq	0:6c56fb4bc5f0	905
nexpaq	0:6c56fb4bc5f0	906	#if defined(MBEDTLS_CIPHER_MODE_CBC)
nexpaq	0:6c56fb4bc5f0	907	if( cipher_info->mode == MBEDTLS_MODE_CBC )
nexpaq	0:6c56fb4bc5f0	908	{
nexpaq	0:6c56fb4bc5f0	909	if( ( ret = mbedtls_cipher_set_padding_mode( &transform->cipher_ctx_enc,
nexpaq	0:6c56fb4bc5f0	910	MBEDTLS_PADDING_NONE ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	911	{
nexpaq	0:6c56fb4bc5f0	912	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_cipher_set_padding_mode", ret );
nexpaq	0:6c56fb4bc5f0	913	return( ret );
nexpaq	0:6c56fb4bc5f0	914	}
nexpaq	0:6c56fb4bc5f0	915
nexpaq	0:6c56fb4bc5f0	916	if( ( ret = mbedtls_cipher_set_padding_mode( &transform->cipher_ctx_dec,
nexpaq	0:6c56fb4bc5f0	917	MBEDTLS_PADDING_NONE ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	918	{
nexpaq	0:6c56fb4bc5f0	919	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_cipher_set_padding_mode", ret );
nexpaq	0:6c56fb4bc5f0	920	return( ret );
nexpaq	0:6c56fb4bc5f0	921	}
nexpaq	0:6c56fb4bc5f0	922	}
nexpaq	0:6c56fb4bc5f0	923	#endif /* MBEDTLS_CIPHER_MODE_CBC */
nexpaq	0:6c56fb4bc5f0	924
nexpaq	0:6c56fb4bc5f0	925	mbedtls_zeroize( keyblk, sizeof( keyblk ) );
nexpaq	0:6c56fb4bc5f0	926
nexpaq	0:6c56fb4bc5f0	927	#if defined(MBEDTLS_ZLIB_SUPPORT)
nexpaq	0:6c56fb4bc5f0	928	// Initialize compression
nexpaq	0:6c56fb4bc5f0	929	//
nexpaq	0:6c56fb4bc5f0	930	if( session->compression == MBEDTLS_SSL_COMPRESS_DEFLATE )
nexpaq	0:6c56fb4bc5f0	931	{
nexpaq	0:6c56fb4bc5f0	932	if( ssl->compress_buf == NULL )
nexpaq	0:6c56fb4bc5f0	933	{
nexpaq	0:6c56fb4bc5f0	934	MBEDTLS_SSL_DEBUG_MSG( 3, ( "Allocating compression buffer" ) );
nexpaq	0:6c56fb4bc5f0	935	ssl->compress_buf = mbedtls_calloc( 1, MBEDTLS_SSL_BUFFER_LEN );
nexpaq	0:6c56fb4bc5f0	936	if( ssl->compress_buf == NULL )
nexpaq	0:6c56fb4bc5f0	937	{
nexpaq	0:6c56fb4bc5f0	938	MBEDTLS_SSL_DEBUG_MSG( 1, ( "alloc(%d bytes) failed",
nexpaq	0:6c56fb4bc5f0	939	MBEDTLS_SSL_BUFFER_LEN ) );
nexpaq	0:6c56fb4bc5f0	940	return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
nexpaq	0:6c56fb4bc5f0	941	}
nexpaq	0:6c56fb4bc5f0	942	}
nexpaq	0:6c56fb4bc5f0	943
nexpaq	0:6c56fb4bc5f0	944	MBEDTLS_SSL_DEBUG_MSG( 3, ( "Initializing zlib states" ) );
nexpaq	0:6c56fb4bc5f0	945
nexpaq	0:6c56fb4bc5f0	946	memset( &transform->ctx_deflate, 0, sizeof( transform->ctx_deflate ) );
nexpaq	0:6c56fb4bc5f0	947	memset( &transform->ctx_inflate, 0, sizeof( transform->ctx_inflate ) );
nexpaq	0:6c56fb4bc5f0	948
nexpaq	0:6c56fb4bc5f0	949	if( deflateInit( &transform->ctx_deflate,
nexpaq	0:6c56fb4bc5f0	950	Z_DEFAULT_COMPRESSION ) != Z_OK \|\|
nexpaq	0:6c56fb4bc5f0	951	inflateInit( &transform->ctx_inflate ) != Z_OK )
nexpaq	0:6c56fb4bc5f0	952	{
nexpaq	0:6c56fb4bc5f0	953	MBEDTLS_SSL_DEBUG_MSG( 1, ( "Failed to initialize compression" ) );
nexpaq	0:6c56fb4bc5f0	954	return( MBEDTLS_ERR_SSL_COMPRESSION_FAILED );
nexpaq	0:6c56fb4bc5f0	955	}
nexpaq	0:6c56fb4bc5f0	956	}
nexpaq	0:6c56fb4bc5f0	957	#endif /* MBEDTLS_ZLIB_SUPPORT */
nexpaq	0:6c56fb4bc5f0	958
nexpaq	0:6c56fb4bc5f0	959	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= derive keys" ) );
nexpaq	0:6c56fb4bc5f0	960
nexpaq	0:6c56fb4bc5f0	961	return( 0 );
nexpaq	0:6c56fb4bc5f0	962	}
nexpaq	0:6c56fb4bc5f0	963
nexpaq	0:6c56fb4bc5f0	964	#if defined(MBEDTLS_SSL_PROTO_SSL3)
nexpaq	0:6c56fb4bc5f0	965	void ssl_calc_verify_ssl( mbedtls_ssl_context *ssl, unsigned char hash[36] )
nexpaq	0:6c56fb4bc5f0	966	{
nexpaq	0:6c56fb4bc5f0	967	mbedtls_md5_context md5;
nexpaq	0:6c56fb4bc5f0	968	mbedtls_sha1_context sha1;
nexpaq	0:6c56fb4bc5f0	969	unsigned char pad_1[48];
nexpaq	0:6c56fb4bc5f0	970	unsigned char pad_2[48];
nexpaq	0:6c56fb4bc5f0	971
nexpaq	0:6c56fb4bc5f0	972	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> calc verify ssl" ) );
nexpaq	0:6c56fb4bc5f0	973
nexpaq	0:6c56fb4bc5f0	974	mbedtls_md5_init( &md5 );
nexpaq	0:6c56fb4bc5f0	975	mbedtls_sha1_init( &sha1 );
nexpaq	0:6c56fb4bc5f0	976
nexpaq	0:6c56fb4bc5f0	977	mbedtls_md5_clone( &md5, &ssl->handshake->fin_md5 );
nexpaq	0:6c56fb4bc5f0	978	mbedtls_sha1_clone( &sha1, &ssl->handshake->fin_sha1 );
nexpaq	0:6c56fb4bc5f0	979
nexpaq	0:6c56fb4bc5f0	980	memset( pad_1, 0x36, 48 );
nexpaq	0:6c56fb4bc5f0	981	memset( pad_2, 0x5C, 48 );
nexpaq	0:6c56fb4bc5f0	982
nexpaq	0:6c56fb4bc5f0	983	mbedtls_md5_update( &md5, ssl->session_negotiate->master, 48 );
nexpaq	0:6c56fb4bc5f0	984	mbedtls_md5_update( &md5, pad_1, 48 );
nexpaq	0:6c56fb4bc5f0	985	mbedtls_md5_finish( &md5, hash );
nexpaq	0:6c56fb4bc5f0	986
nexpaq	0:6c56fb4bc5f0	987	mbedtls_md5_starts( &md5 );
nexpaq	0:6c56fb4bc5f0	988	mbedtls_md5_update( &md5, ssl->session_negotiate->master, 48 );
nexpaq	0:6c56fb4bc5f0	989	mbedtls_md5_update( &md5, pad_2, 48 );
nexpaq	0:6c56fb4bc5f0	990	mbedtls_md5_update( &md5, hash, 16 );
nexpaq	0:6c56fb4bc5f0	991	mbedtls_md5_finish( &md5, hash );
nexpaq	0:6c56fb4bc5f0	992
nexpaq	0:6c56fb4bc5f0	993	mbedtls_sha1_update( &sha1, ssl->session_negotiate->master, 48 );
nexpaq	0:6c56fb4bc5f0	994	mbedtls_sha1_update( &sha1, pad_1, 40 );
nexpaq	0:6c56fb4bc5f0	995	mbedtls_sha1_finish( &sha1, hash + 16 );
nexpaq	0:6c56fb4bc5f0	996
nexpaq	0:6c56fb4bc5f0	997	mbedtls_sha1_starts( &sha1 );
nexpaq	0:6c56fb4bc5f0	998	mbedtls_sha1_update( &sha1, ssl->session_negotiate->master, 48 );
nexpaq	0:6c56fb4bc5f0	999	mbedtls_sha1_update( &sha1, pad_2, 40 );
nexpaq	0:6c56fb4bc5f0	1000	mbedtls_sha1_update( &sha1, hash + 16, 20 );
nexpaq	0:6c56fb4bc5f0	1001	mbedtls_sha1_finish( &sha1, hash + 16 );
nexpaq	0:6c56fb4bc5f0	1002
nexpaq	0:6c56fb4bc5f0	1003	MBEDTLS_SSL_DEBUG_BUF( 3, "calculated verify result", hash, 36 );
nexpaq	0:6c56fb4bc5f0	1004	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= calc verify" ) );
nexpaq	0:6c56fb4bc5f0	1005
nexpaq	0:6c56fb4bc5f0	1006	mbedtls_md5_free( &md5 );
nexpaq	0:6c56fb4bc5f0	1007	mbedtls_sha1_free( &sha1 );
nexpaq	0:6c56fb4bc5f0	1008
nexpaq	0:6c56fb4bc5f0	1009	return;
nexpaq	0:6c56fb4bc5f0	1010	}
nexpaq	0:6c56fb4bc5f0	1011	#endif /* MBEDTLS_SSL_PROTO_SSL3 */
nexpaq	0:6c56fb4bc5f0	1012
nexpaq	0:6c56fb4bc5f0	1013	#if defined(MBEDTLS_SSL_PROTO_TLS1) \|\| defined(MBEDTLS_SSL_PROTO_TLS1_1)
nexpaq	0:6c56fb4bc5f0	1014	void ssl_calc_verify_tls( mbedtls_ssl_context *ssl, unsigned char hash[36] )
nexpaq	0:6c56fb4bc5f0	1015	{
nexpaq	0:6c56fb4bc5f0	1016	mbedtls_md5_context md5;
nexpaq	0:6c56fb4bc5f0	1017	mbedtls_sha1_context sha1;
nexpaq	0:6c56fb4bc5f0	1018
nexpaq	0:6c56fb4bc5f0	1019	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> calc verify tls" ) );
nexpaq	0:6c56fb4bc5f0	1020
nexpaq	0:6c56fb4bc5f0	1021	mbedtls_md5_init( &md5 );
nexpaq	0:6c56fb4bc5f0	1022	mbedtls_sha1_init( &sha1 );
nexpaq	0:6c56fb4bc5f0	1023
nexpaq	0:6c56fb4bc5f0	1024	mbedtls_md5_clone( &md5, &ssl->handshake->fin_md5 );
nexpaq	0:6c56fb4bc5f0	1025	mbedtls_sha1_clone( &sha1, &ssl->handshake->fin_sha1 );
nexpaq	0:6c56fb4bc5f0	1026
nexpaq	0:6c56fb4bc5f0	1027	mbedtls_md5_finish( &md5, hash );
nexpaq	0:6c56fb4bc5f0	1028	mbedtls_sha1_finish( &sha1, hash + 16 );
nexpaq	0:6c56fb4bc5f0	1029
nexpaq	0:6c56fb4bc5f0	1030	MBEDTLS_SSL_DEBUG_BUF( 3, "calculated verify result", hash, 36 );
nexpaq	0:6c56fb4bc5f0	1031	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= calc verify" ) );
nexpaq	0:6c56fb4bc5f0	1032
nexpaq	0:6c56fb4bc5f0	1033	mbedtls_md5_free( &md5 );
nexpaq	0:6c56fb4bc5f0	1034	mbedtls_sha1_free( &sha1 );
nexpaq	0:6c56fb4bc5f0	1035
nexpaq	0:6c56fb4bc5f0	1036	return;
nexpaq	0:6c56fb4bc5f0	1037	}
nexpaq	0:6c56fb4bc5f0	1038	#endif /* MBEDTLS_SSL_PROTO_TLS1 \|\| MBEDTLS_SSL_PROTO_TLS1_1 */
nexpaq	0:6c56fb4bc5f0	1039
nexpaq	0:6c56fb4bc5f0	1040	#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
nexpaq	0:6c56fb4bc5f0	1041	#if defined(MBEDTLS_SHA256_C)
nexpaq	0:6c56fb4bc5f0	1042	void ssl_calc_verify_tls_sha256( mbedtls_ssl_context *ssl, unsigned char hash[32] )
nexpaq	0:6c56fb4bc5f0	1043	{
nexpaq	0:6c56fb4bc5f0	1044	mbedtls_sha256_context sha256;
nexpaq	0:6c56fb4bc5f0	1045
nexpaq	0:6c56fb4bc5f0	1046	mbedtls_sha256_init( &sha256 );
nexpaq	0:6c56fb4bc5f0	1047
nexpaq	0:6c56fb4bc5f0	1048	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> calc verify sha256" ) );
nexpaq	0:6c56fb4bc5f0	1049
nexpaq	0:6c56fb4bc5f0	1050	mbedtls_sha256_clone( &sha256, &ssl->handshake->fin_sha256 );
nexpaq	0:6c56fb4bc5f0	1051	mbedtls_sha256_finish( &sha256, hash );
nexpaq	0:6c56fb4bc5f0	1052
nexpaq	0:6c56fb4bc5f0	1053	MBEDTLS_SSL_DEBUG_BUF( 3, "calculated verify result", hash, 32 );
nexpaq	0:6c56fb4bc5f0	1054	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= calc verify" ) );
nexpaq	0:6c56fb4bc5f0	1055
nexpaq	0:6c56fb4bc5f0	1056	mbedtls_sha256_free( &sha256 );
nexpaq	0:6c56fb4bc5f0	1057
nexpaq	0:6c56fb4bc5f0	1058	return;
nexpaq	0:6c56fb4bc5f0	1059	}
nexpaq	0:6c56fb4bc5f0	1060	#endif /* MBEDTLS_SHA256_C */
nexpaq	0:6c56fb4bc5f0	1061
nexpaq	0:6c56fb4bc5f0	1062	#if defined(MBEDTLS_SHA512_C)
nexpaq	0:6c56fb4bc5f0	1063	void ssl_calc_verify_tls_sha384( mbedtls_ssl_context *ssl, unsigned char hash[48] )
nexpaq	0:6c56fb4bc5f0	1064	{
nexpaq	0:6c56fb4bc5f0	1065	mbedtls_sha512_context sha512;
nexpaq	0:6c56fb4bc5f0	1066
nexpaq	0:6c56fb4bc5f0	1067	mbedtls_sha512_init( &sha512 );
nexpaq	0:6c56fb4bc5f0	1068
nexpaq	0:6c56fb4bc5f0	1069	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> calc verify sha384" ) );
nexpaq	0:6c56fb4bc5f0	1070
nexpaq	0:6c56fb4bc5f0	1071	mbedtls_sha512_clone( &sha512, &ssl->handshake->fin_sha512 );
nexpaq	0:6c56fb4bc5f0	1072	mbedtls_sha512_finish( &sha512, hash );
nexpaq	0:6c56fb4bc5f0	1073
nexpaq	0:6c56fb4bc5f0	1074	MBEDTLS_SSL_DEBUG_BUF( 3, "calculated verify result", hash, 48 );
nexpaq	0:6c56fb4bc5f0	1075	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= calc verify" ) );
nexpaq	0:6c56fb4bc5f0	1076
nexpaq	0:6c56fb4bc5f0	1077	mbedtls_sha512_free( &sha512 );
nexpaq	0:6c56fb4bc5f0	1078
nexpaq	0:6c56fb4bc5f0	1079	return;
nexpaq	0:6c56fb4bc5f0	1080	}
nexpaq	0:6c56fb4bc5f0	1081	#endif /* MBEDTLS_SHA512_C */
nexpaq	0:6c56fb4bc5f0	1082	#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
nexpaq	0:6c56fb4bc5f0	1083
nexpaq	0:6c56fb4bc5f0	1084	#if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
nexpaq	0:6c56fb4bc5f0	1085	int mbedtls_ssl_psk_derive_premaster( mbedtls_ssl_context *ssl, mbedtls_key_exchange_type_t key_ex )
nexpaq	0:6c56fb4bc5f0	1086	{
nexpaq	0:6c56fb4bc5f0	1087	unsigned char *p = ssl->handshake->premaster;
nexpaq	0:6c56fb4bc5f0	1088	unsigned char *end = p + sizeof( ssl->handshake->premaster );
nexpaq	0:6c56fb4bc5f0	1089	const unsigned char *psk = ssl->conf->psk;
nexpaq	0:6c56fb4bc5f0	1090	size_t psk_len = ssl->conf->psk_len;
nexpaq	0:6c56fb4bc5f0	1091
nexpaq	0:6c56fb4bc5f0	1092	/* If the psk callback was called, use its result */
nexpaq	0:6c56fb4bc5f0	1093	if( ssl->handshake->psk != NULL )
nexpaq	0:6c56fb4bc5f0	1094	{
nexpaq	0:6c56fb4bc5f0	1095	psk = ssl->handshake->psk;
nexpaq	0:6c56fb4bc5f0	1096	psk_len = ssl->handshake->psk_len;
nexpaq	0:6c56fb4bc5f0	1097	}
nexpaq	0:6c56fb4bc5f0	1098
nexpaq	0:6c56fb4bc5f0	1099	/*
nexpaq	0:6c56fb4bc5f0	1100	* PMS = struct {
nexpaq	0:6c56fb4bc5f0	1101	* opaque other_secret<0..2^16-1>;
nexpaq	0:6c56fb4bc5f0	1102	* opaque psk<0..2^16-1>;
nexpaq	0:6c56fb4bc5f0	1103	* };
nexpaq	0:6c56fb4bc5f0	1104	* with "other_secret" depending on the particular key exchange
nexpaq	0:6c56fb4bc5f0	1105	*/
nexpaq	0:6c56fb4bc5f0	1106	#if defined(MBEDTLS_KEY_EXCHANGE_PSK_ENABLED)
nexpaq	0:6c56fb4bc5f0	1107	if( key_ex == MBEDTLS_KEY_EXCHANGE_PSK )
nexpaq	0:6c56fb4bc5f0	1108	{
nexpaq	0:6c56fb4bc5f0	1109	if( end - p < 2 )
nexpaq	0:6c56fb4bc5f0	1110	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
nexpaq	0:6c56fb4bc5f0	1111
nexpaq	0:6c56fb4bc5f0	1112	*(p++) = (unsigned char)( psk_len >> 8 );
nexpaq	0:6c56fb4bc5f0	1113	*(p++) = (unsigned char)( psk_len );
nexpaq	0:6c56fb4bc5f0	1114
nexpaq	0:6c56fb4bc5f0	1115	if( end < p \|\| (size_t)( end - p ) < psk_len )
nexpaq	0:6c56fb4bc5f0	1116	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
nexpaq	0:6c56fb4bc5f0	1117
nexpaq	0:6c56fb4bc5f0	1118	memset( p, 0, psk_len );
nexpaq	0:6c56fb4bc5f0	1119	p += psk_len;
nexpaq	0:6c56fb4bc5f0	1120	}
nexpaq	0:6c56fb4bc5f0	1121	else
nexpaq	0:6c56fb4bc5f0	1122	#endif /* MBEDTLS_KEY_EXCHANGE_PSK_ENABLED */
nexpaq	0:6c56fb4bc5f0	1123	#if defined(MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED)
nexpaq	0:6c56fb4bc5f0	1124	if( key_ex == MBEDTLS_KEY_EXCHANGE_RSA_PSK )
nexpaq	0:6c56fb4bc5f0	1125	{
nexpaq	0:6c56fb4bc5f0	1126	/*
nexpaq	0:6c56fb4bc5f0	1127	* other_secret already set by the ClientKeyExchange message,
nexpaq	0:6c56fb4bc5f0	1128	* and is 48 bytes long
nexpaq	0:6c56fb4bc5f0	1129	*/
nexpaq	0:6c56fb4bc5f0	1130	*p++ = 0;
nexpaq	0:6c56fb4bc5f0	1131	*p++ = 48;
nexpaq	0:6c56fb4bc5f0	1132	p += 48;
nexpaq	0:6c56fb4bc5f0	1133	}
nexpaq	0:6c56fb4bc5f0	1134	else
nexpaq	0:6c56fb4bc5f0	1135	#endif /* MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED */
nexpaq	0:6c56fb4bc5f0	1136	#if defined(MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED)
nexpaq	0:6c56fb4bc5f0	1137	if( key_ex == MBEDTLS_KEY_EXCHANGE_DHE_PSK )
nexpaq	0:6c56fb4bc5f0	1138	{
nexpaq	0:6c56fb4bc5f0	1139	int ret;
nexpaq	0:6c56fb4bc5f0	1140	size_t len;
nexpaq	0:6c56fb4bc5f0	1141
nexpaq	0:6c56fb4bc5f0	1142	/* Write length only when we know the actual value */
nexpaq	0:6c56fb4bc5f0	1143	if( ( ret = mbedtls_dhm_calc_secret( &ssl->handshake->dhm_ctx,
nexpaq	0:6c56fb4bc5f0	1144	p + 2, end - ( p + 2 ), &len,
nexpaq	0:6c56fb4bc5f0	1145	ssl->conf->f_rng, ssl->conf->p_rng ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	1146	{
nexpaq	0:6c56fb4bc5f0	1147	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_dhm_calc_secret", ret );
nexpaq	0:6c56fb4bc5f0	1148	return( ret );
nexpaq	0:6c56fb4bc5f0	1149	}
nexpaq	0:6c56fb4bc5f0	1150	*(p++) = (unsigned char)( len >> 8 );
nexpaq	0:6c56fb4bc5f0	1151	*(p++) = (unsigned char)( len );
nexpaq	0:6c56fb4bc5f0	1152	p += len;
nexpaq	0:6c56fb4bc5f0	1153
nexpaq	0:6c56fb4bc5f0	1154	MBEDTLS_SSL_DEBUG_MPI( 3, "DHM: K ", &ssl->handshake->dhm_ctx.K );
nexpaq	0:6c56fb4bc5f0	1155	}
nexpaq	0:6c56fb4bc5f0	1156	else
nexpaq	0:6c56fb4bc5f0	1157	#endif /* MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED */
nexpaq	0:6c56fb4bc5f0	1158	#if defined(MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED)
nexpaq	0:6c56fb4bc5f0	1159	if( key_ex == MBEDTLS_KEY_EXCHANGE_ECDHE_PSK )
nexpaq	0:6c56fb4bc5f0	1160	{
nexpaq	0:6c56fb4bc5f0	1161	int ret;
nexpaq	0:6c56fb4bc5f0	1162	size_t zlen;
nexpaq	0:6c56fb4bc5f0	1163
nexpaq	0:6c56fb4bc5f0	1164	if( ( ret = mbedtls_ecdh_calc_secret( &ssl->handshake->ecdh_ctx, &zlen,
nexpaq	0:6c56fb4bc5f0	1165	p + 2, end - ( p + 2 ),
nexpaq	0:6c56fb4bc5f0	1166	ssl->conf->f_rng, ssl->conf->p_rng ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	1167	{
nexpaq	0:6c56fb4bc5f0	1168	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ecdh_calc_secret", ret );
nexpaq	0:6c56fb4bc5f0	1169	return( ret );
nexpaq	0:6c56fb4bc5f0	1170	}
nexpaq	0:6c56fb4bc5f0	1171
nexpaq	0:6c56fb4bc5f0	1172	*(p++) = (unsigned char)( zlen >> 8 );
nexpaq	0:6c56fb4bc5f0	1173	*(p++) = (unsigned char)( zlen );
nexpaq	0:6c56fb4bc5f0	1174	p += zlen;
nexpaq	0:6c56fb4bc5f0	1175
nexpaq	0:6c56fb4bc5f0	1176	MBEDTLS_SSL_DEBUG_MPI( 3, "ECDH: z", &ssl->handshake->ecdh_ctx.z );
nexpaq	0:6c56fb4bc5f0	1177	}
nexpaq	0:6c56fb4bc5f0	1178	else
nexpaq	0:6c56fb4bc5f0	1179	#endif /* MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED */
nexpaq	0:6c56fb4bc5f0	1180	{
nexpaq	0:6c56fb4bc5f0	1181	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
nexpaq	0:6c56fb4bc5f0	1182	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
nexpaq	0:6c56fb4bc5f0	1183	}
nexpaq	0:6c56fb4bc5f0	1184
nexpaq	0:6c56fb4bc5f0	1185	/* opaque psk<0..2^16-1>; */
nexpaq	0:6c56fb4bc5f0	1186	if( end - p < 2 )
nexpaq	0:6c56fb4bc5f0	1187	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
nexpaq	0:6c56fb4bc5f0	1188
nexpaq	0:6c56fb4bc5f0	1189	*(p++) = (unsigned char)( psk_len >> 8 );
nexpaq	0:6c56fb4bc5f0	1190	*(p++) = (unsigned char)( psk_len );
nexpaq	0:6c56fb4bc5f0	1191
nexpaq	0:6c56fb4bc5f0	1192	if( end < p \|\| (size_t)( end - p ) < psk_len )
nexpaq	0:6c56fb4bc5f0	1193	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
nexpaq	0:6c56fb4bc5f0	1194
nexpaq	0:6c56fb4bc5f0	1195	memcpy( p, psk, psk_len );
nexpaq	0:6c56fb4bc5f0	1196	p += psk_len;
nexpaq	0:6c56fb4bc5f0	1197
nexpaq	0:6c56fb4bc5f0	1198	ssl->handshake->pmslen = p - ssl->handshake->premaster;
nexpaq	0:6c56fb4bc5f0	1199
nexpaq	0:6c56fb4bc5f0	1200	return( 0 );
nexpaq	0:6c56fb4bc5f0	1201	}
nexpaq	0:6c56fb4bc5f0	1202	#endif /* MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED */
nexpaq	0:6c56fb4bc5f0	1203
nexpaq	0:6c56fb4bc5f0	1204	#if defined(MBEDTLS_SSL_PROTO_SSL3)
nexpaq	0:6c56fb4bc5f0	1205	/*
nexpaq	0:6c56fb4bc5f0	1206	* SSLv3.0 MAC functions
nexpaq	0:6c56fb4bc5f0	1207	*/
nexpaq	0:6c56fb4bc5f0	1208	static void ssl_mac( mbedtls_md_context_t md_ctx, unsigned char secret,
nexpaq	0:6c56fb4bc5f0	1209	unsigned char *buf, size_t len,
nexpaq	0:6c56fb4bc5f0	1210	unsigned char *ctr, int type )
nexpaq	0:6c56fb4bc5f0	1211	{
nexpaq	0:6c56fb4bc5f0	1212	unsigned char header[11];
nexpaq	0:6c56fb4bc5f0	1213	unsigned char padding[48];
nexpaq	0:6c56fb4bc5f0	1214	int padlen;
nexpaq	0:6c56fb4bc5f0	1215	int md_size = mbedtls_md_get_size( md_ctx->md_info );
nexpaq	0:6c56fb4bc5f0	1216	int md_type = mbedtls_md_get_type( md_ctx->md_info );
nexpaq	0:6c56fb4bc5f0	1217
nexpaq	0:6c56fb4bc5f0	1218	/* Only MD5 and SHA-1 supported */
nexpaq	0:6c56fb4bc5f0	1219	if( md_type == MBEDTLS_MD_MD5 )
nexpaq	0:6c56fb4bc5f0	1220	padlen = 48;
nexpaq	0:6c56fb4bc5f0	1221	else
nexpaq	0:6c56fb4bc5f0	1222	padlen = 40;
nexpaq	0:6c56fb4bc5f0	1223
nexpaq	0:6c56fb4bc5f0	1224	memcpy( header, ctr, 8 );
nexpaq	0:6c56fb4bc5f0	1225	header[ 8] = (unsigned char) type;
nexpaq	0:6c56fb4bc5f0	1226	header[ 9] = (unsigned char)( len >> 8 );
nexpaq	0:6c56fb4bc5f0	1227	header[10] = (unsigned char)( len );
nexpaq	0:6c56fb4bc5f0	1228
nexpaq	0:6c56fb4bc5f0	1229	memset( padding, 0x36, padlen );
nexpaq	0:6c56fb4bc5f0	1230	mbedtls_md_starts( md_ctx );
nexpaq	0:6c56fb4bc5f0	1231	mbedtls_md_update( md_ctx, secret, md_size );
nexpaq	0:6c56fb4bc5f0	1232	mbedtls_md_update( md_ctx, padding, padlen );
nexpaq	0:6c56fb4bc5f0	1233	mbedtls_md_update( md_ctx, header, 11 );
nexpaq	0:6c56fb4bc5f0	1234	mbedtls_md_update( md_ctx, buf, len );
nexpaq	0:6c56fb4bc5f0	1235	mbedtls_md_finish( md_ctx, buf + len );
nexpaq	0:6c56fb4bc5f0	1236
nexpaq	0:6c56fb4bc5f0	1237	memset( padding, 0x5C, padlen );
nexpaq	0:6c56fb4bc5f0	1238	mbedtls_md_starts( md_ctx );
nexpaq	0:6c56fb4bc5f0	1239	mbedtls_md_update( md_ctx, secret, md_size );
nexpaq	0:6c56fb4bc5f0	1240	mbedtls_md_update( md_ctx, padding, padlen );
nexpaq	0:6c56fb4bc5f0	1241	mbedtls_md_update( md_ctx, buf + len, md_size );
nexpaq	0:6c56fb4bc5f0	1242	mbedtls_md_finish( md_ctx, buf + len );
nexpaq	0:6c56fb4bc5f0	1243	}
nexpaq	0:6c56fb4bc5f0	1244	#endif /* MBEDTLS_SSL_PROTO_SSL3 */
nexpaq	0:6c56fb4bc5f0	1245
nexpaq	0:6c56fb4bc5f0	1246	#if defined(MBEDTLS_ARC4_C) \|\| defined(MBEDTLS_CIPHER_NULL_CIPHER) \|\| \
nexpaq	0:6c56fb4bc5f0	1247	( defined(MBEDTLS_CIPHER_MODE_CBC) && \
nexpaq	0:6c56fb4bc5f0	1248	( defined(MBEDTLS_AES_C) \|\| defined(MBEDTLS_CAMELLIA_C) ) )
nexpaq	0:6c56fb4bc5f0	1249	#define SSL_SOME_MODES_USE_MAC
nexpaq	0:6c56fb4bc5f0	1250	#endif
nexpaq	0:6c56fb4bc5f0	1251
nexpaq	0:6c56fb4bc5f0	1252	/*
nexpaq	0:6c56fb4bc5f0	1253	* Encryption/decryption functions
nexpaq	0:6c56fb4bc5f0	1254	*/
nexpaq	0:6c56fb4bc5f0	1255	static int ssl_encrypt_buf( mbedtls_ssl_context *ssl )
nexpaq	0:6c56fb4bc5f0	1256	{
nexpaq	0:6c56fb4bc5f0	1257	mbedtls_cipher_mode_t mode;
nexpaq	0:6c56fb4bc5f0	1258	int auth_done = 0;
nexpaq	0:6c56fb4bc5f0	1259
nexpaq	0:6c56fb4bc5f0	1260	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> encrypt buf" ) );
nexpaq	0:6c56fb4bc5f0	1261
nexpaq	0:6c56fb4bc5f0	1262	if( ssl->session_out == NULL \|\| ssl->transform_out == NULL )
nexpaq	0:6c56fb4bc5f0	1263	{
nexpaq	0:6c56fb4bc5f0	1264	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
nexpaq	0:6c56fb4bc5f0	1265	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
nexpaq	0:6c56fb4bc5f0	1266	}
nexpaq	0:6c56fb4bc5f0	1267
nexpaq	0:6c56fb4bc5f0	1268	mode = mbedtls_cipher_get_cipher_mode( &ssl->transform_out->cipher_ctx_enc );
nexpaq	0:6c56fb4bc5f0	1269
nexpaq	0:6c56fb4bc5f0	1270	MBEDTLS_SSL_DEBUG_BUF( 4, "before encrypt: output payload",
nexpaq	0:6c56fb4bc5f0	1271	ssl->out_msg, ssl->out_msglen );
nexpaq	0:6c56fb4bc5f0	1272
nexpaq	0:6c56fb4bc5f0	1273	/*
nexpaq	0:6c56fb4bc5f0	1274	* Add MAC before if needed
nexpaq	0:6c56fb4bc5f0	1275	*/
nexpaq	0:6c56fb4bc5f0	1276	#if defined(SSL_SOME_MODES_USE_MAC)
nexpaq	0:6c56fb4bc5f0	1277	if( mode == MBEDTLS_MODE_STREAM \|\|
nexpaq	0:6c56fb4bc5f0	1278	( mode == MBEDTLS_MODE_CBC
nexpaq	0:6c56fb4bc5f0	1279	#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
nexpaq	0:6c56fb4bc5f0	1280	&& ssl->session_out->encrypt_then_mac == MBEDTLS_SSL_ETM_DISABLED
nexpaq	0:6c56fb4bc5f0	1281	#endif
nexpaq	0:6c56fb4bc5f0	1282	) )
nexpaq	0:6c56fb4bc5f0	1283	{
nexpaq	0:6c56fb4bc5f0	1284	#if defined(MBEDTLS_SSL_PROTO_SSL3)
nexpaq	0:6c56fb4bc5f0	1285	if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 )
nexpaq	0:6c56fb4bc5f0	1286	{
nexpaq	0:6c56fb4bc5f0	1287	ssl_mac( &ssl->transform_out->md_ctx_enc,
nexpaq	0:6c56fb4bc5f0	1288	ssl->transform_out->mac_enc,
nexpaq	0:6c56fb4bc5f0	1289	ssl->out_msg, ssl->out_msglen,
nexpaq	0:6c56fb4bc5f0	1290	ssl->out_ctr, ssl->out_msgtype );
nexpaq	0:6c56fb4bc5f0	1291	}
nexpaq	0:6c56fb4bc5f0	1292	else
nexpaq	0:6c56fb4bc5f0	1293	#endif
nexpaq	0:6c56fb4bc5f0	1294	#if defined(MBEDTLS_SSL_PROTO_TLS1) \|\| defined(MBEDTLS_SSL_PROTO_TLS1_1) \|\| \
nexpaq	0:6c56fb4bc5f0	1295	defined(MBEDTLS_SSL_PROTO_TLS1_2)
nexpaq	0:6c56fb4bc5f0	1296	if( ssl->minor_ver >= MBEDTLS_SSL_MINOR_VERSION_1 )
nexpaq	0:6c56fb4bc5f0	1297	{
nexpaq	0:6c56fb4bc5f0	1298	mbedtls_md_hmac_update( &ssl->transform_out->md_ctx_enc, ssl->out_ctr, 8 );
nexpaq	0:6c56fb4bc5f0	1299	mbedtls_md_hmac_update( &ssl->transform_out->md_ctx_enc, ssl->out_hdr, 3 );
nexpaq	0:6c56fb4bc5f0	1300	mbedtls_md_hmac_update( &ssl->transform_out->md_ctx_enc, ssl->out_len, 2 );
nexpaq	0:6c56fb4bc5f0	1301	mbedtls_md_hmac_update( &ssl->transform_out->md_ctx_enc,
nexpaq	0:6c56fb4bc5f0	1302	ssl->out_msg, ssl->out_msglen );
nexpaq	0:6c56fb4bc5f0	1303	mbedtls_md_hmac_finish( &ssl->transform_out->md_ctx_enc,
nexpaq	0:6c56fb4bc5f0	1304	ssl->out_msg + ssl->out_msglen );
nexpaq	0:6c56fb4bc5f0	1305	mbedtls_md_hmac_reset( &ssl->transform_out->md_ctx_enc );
nexpaq	0:6c56fb4bc5f0	1306	}
nexpaq	0:6c56fb4bc5f0	1307	else
nexpaq	0:6c56fb4bc5f0	1308	#endif
nexpaq	0:6c56fb4bc5f0	1309	{
nexpaq	0:6c56fb4bc5f0	1310	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
nexpaq	0:6c56fb4bc5f0	1311	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
nexpaq	0:6c56fb4bc5f0	1312	}
nexpaq	0:6c56fb4bc5f0	1313
nexpaq	0:6c56fb4bc5f0	1314	MBEDTLS_SSL_DEBUG_BUF( 4, "computed mac",
nexpaq	0:6c56fb4bc5f0	1315	ssl->out_msg + ssl->out_msglen,
nexpaq	0:6c56fb4bc5f0	1316	ssl->transform_out->maclen );
nexpaq	0:6c56fb4bc5f0	1317
nexpaq	0:6c56fb4bc5f0	1318	ssl->out_msglen += ssl->transform_out->maclen;
nexpaq	0:6c56fb4bc5f0	1319	auth_done++;
nexpaq	0:6c56fb4bc5f0	1320	}
nexpaq	0:6c56fb4bc5f0	1321	#endif /* AEAD not the only option */
nexpaq	0:6c56fb4bc5f0	1322
nexpaq	0:6c56fb4bc5f0	1323	/*
nexpaq	0:6c56fb4bc5f0	1324	* Encrypt
nexpaq	0:6c56fb4bc5f0	1325	*/
nexpaq	0:6c56fb4bc5f0	1326	#if defined(MBEDTLS_ARC4_C) \|\| defined(MBEDTLS_CIPHER_NULL_CIPHER)
nexpaq	0:6c56fb4bc5f0	1327	if( mode == MBEDTLS_MODE_STREAM )
nexpaq	0:6c56fb4bc5f0	1328	{
nexpaq	0:6c56fb4bc5f0	1329	int ret;
nexpaq	0:6c56fb4bc5f0	1330	size_t olen = 0;
nexpaq	0:6c56fb4bc5f0	1331
nexpaq	0:6c56fb4bc5f0	1332	MBEDTLS_SSL_DEBUG_MSG( 3, ( "before encrypt: msglen = %d, "
nexpaq	0:6c56fb4bc5f0	1333	"including %d bytes of padding",
nexpaq	0:6c56fb4bc5f0	1334	ssl->out_msglen, 0 ) );
nexpaq	0:6c56fb4bc5f0	1335
nexpaq	0:6c56fb4bc5f0	1336	if( ( ret = mbedtls_cipher_crypt( &ssl->transform_out->cipher_ctx_enc,
nexpaq	0:6c56fb4bc5f0	1337	ssl->transform_out->iv_enc,
nexpaq	0:6c56fb4bc5f0	1338	ssl->transform_out->ivlen,
nexpaq	0:6c56fb4bc5f0	1339	ssl->out_msg, ssl->out_msglen,
nexpaq	0:6c56fb4bc5f0	1340	ssl->out_msg, &olen ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	1341	{
nexpaq	0:6c56fb4bc5f0	1342	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_cipher_crypt", ret );
nexpaq	0:6c56fb4bc5f0	1343	return( ret );
nexpaq	0:6c56fb4bc5f0	1344	}
nexpaq	0:6c56fb4bc5f0	1345
nexpaq	0:6c56fb4bc5f0	1346	if( ssl->out_msglen != olen )
nexpaq	0:6c56fb4bc5f0	1347	{
nexpaq	0:6c56fb4bc5f0	1348	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
nexpaq	0:6c56fb4bc5f0	1349	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
nexpaq	0:6c56fb4bc5f0	1350	}
nexpaq	0:6c56fb4bc5f0	1351	}
nexpaq	0:6c56fb4bc5f0	1352	else
nexpaq	0:6c56fb4bc5f0	1353	#endif /* MBEDTLS_ARC4_C \|\| MBEDTLS_CIPHER_NULL_CIPHER */
nexpaq	0:6c56fb4bc5f0	1354	#if defined(MBEDTLS_GCM_C) \|\| defined(MBEDTLS_CCM_C)
nexpaq	0:6c56fb4bc5f0	1355	if( mode == MBEDTLS_MODE_GCM \|\|
nexpaq	0:6c56fb4bc5f0	1356	mode == MBEDTLS_MODE_CCM )
nexpaq	0:6c56fb4bc5f0	1357	{
nexpaq	0:6c56fb4bc5f0	1358	int ret;
nexpaq	0:6c56fb4bc5f0	1359	size_t enc_msglen, olen;
nexpaq	0:6c56fb4bc5f0	1360	unsigned char *enc_msg;
nexpaq	0:6c56fb4bc5f0	1361	unsigned char add_data[13];
nexpaq	0:6c56fb4bc5f0	1362	unsigned char taglen = ssl->transform_out->ciphersuite_info->flags &
nexpaq	0:6c56fb4bc5f0	1363	MBEDTLS_CIPHERSUITE_SHORT_TAG ? 8 : 16;
nexpaq	0:6c56fb4bc5f0	1364
nexpaq	0:6c56fb4bc5f0	1365	memcpy( add_data, ssl->out_ctr, 8 );
nexpaq	0:6c56fb4bc5f0	1366	add_data[8] = ssl->out_msgtype;
nexpaq	0:6c56fb4bc5f0	1367	mbedtls_ssl_write_version( ssl->major_ver, ssl->minor_ver,
nexpaq	0:6c56fb4bc5f0	1368	ssl->conf->transport, add_data + 9 );
nexpaq	0:6c56fb4bc5f0	1369	add_data[11] = ( ssl->out_msglen >> 8 ) & 0xFF;
nexpaq	0:6c56fb4bc5f0	1370	add_data[12] = ssl->out_msglen & 0xFF;
nexpaq	0:6c56fb4bc5f0	1371
nexpaq	0:6c56fb4bc5f0	1372	MBEDTLS_SSL_DEBUG_BUF( 4, "additional data used for AEAD",
nexpaq	0:6c56fb4bc5f0	1373	add_data, 13 );
nexpaq	0:6c56fb4bc5f0	1374
nexpaq	0:6c56fb4bc5f0	1375	/*
nexpaq	0:6c56fb4bc5f0	1376	* Generate IV
nexpaq	0:6c56fb4bc5f0	1377	*/
nexpaq	0:6c56fb4bc5f0	1378	#if defined(MBEDTLS_SSL_AEAD_RANDOM_IV)
nexpaq	0:6c56fb4bc5f0	1379	ret = ssl->conf->f_rng( ssl->conf->p_rng,
nexpaq	0:6c56fb4bc5f0	1380	ssl->transform_out->iv_enc + ssl->transform_out->fixed_ivlen,
nexpaq	0:6c56fb4bc5f0	1381	ssl->transform_out->ivlen - ssl->transform_out->fixed_ivlen );
nexpaq	0:6c56fb4bc5f0	1382	if( ret != 0 )
nexpaq	0:6c56fb4bc5f0	1383	return( ret );
nexpaq	0:6c56fb4bc5f0	1384
nexpaq	0:6c56fb4bc5f0	1385	memcpy( ssl->out_iv,
nexpaq	0:6c56fb4bc5f0	1386	ssl->transform_out->iv_enc + ssl->transform_out->fixed_ivlen,
nexpaq	0:6c56fb4bc5f0	1387	ssl->transform_out->ivlen - ssl->transform_out->fixed_ivlen );
nexpaq	0:6c56fb4bc5f0	1388	#else
nexpaq	0:6c56fb4bc5f0	1389	if( ssl->transform_out->ivlen - ssl->transform_out->fixed_ivlen != 8 )
nexpaq	0:6c56fb4bc5f0	1390	{
nexpaq	0:6c56fb4bc5f0	1391	/* Reminder if we ever add an AEAD mode with a different size */
nexpaq	0:6c56fb4bc5f0	1392	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
nexpaq	0:6c56fb4bc5f0	1393	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
nexpaq	0:6c56fb4bc5f0	1394	}
nexpaq	0:6c56fb4bc5f0	1395
nexpaq	0:6c56fb4bc5f0	1396	memcpy( ssl->transform_out->iv_enc + ssl->transform_out->fixed_ivlen,
nexpaq	0:6c56fb4bc5f0	1397	ssl->out_ctr, 8 );
nexpaq	0:6c56fb4bc5f0	1398	memcpy( ssl->out_iv, ssl->out_ctr, 8 );
nexpaq	0:6c56fb4bc5f0	1399	#endif
nexpaq	0:6c56fb4bc5f0	1400
nexpaq	0:6c56fb4bc5f0	1401	MBEDTLS_SSL_DEBUG_BUF( 4, "IV used", ssl->out_iv,
nexpaq	0:6c56fb4bc5f0	1402	ssl->transform_out->ivlen - ssl->transform_out->fixed_ivlen );
nexpaq	0:6c56fb4bc5f0	1403
nexpaq	0:6c56fb4bc5f0	1404	/*
nexpaq	0:6c56fb4bc5f0	1405	* Fix pointer positions and message length with added IV
nexpaq	0:6c56fb4bc5f0	1406	*/
nexpaq	0:6c56fb4bc5f0	1407	enc_msg = ssl->out_msg;
nexpaq	0:6c56fb4bc5f0	1408	enc_msglen = ssl->out_msglen;
nexpaq	0:6c56fb4bc5f0	1409	ssl->out_msglen += ssl->transform_out->ivlen -
nexpaq	0:6c56fb4bc5f0	1410	ssl->transform_out->fixed_ivlen;
nexpaq	0:6c56fb4bc5f0	1411
nexpaq	0:6c56fb4bc5f0	1412	MBEDTLS_SSL_DEBUG_MSG( 3, ( "before encrypt: msglen = %d, "
nexpaq	0:6c56fb4bc5f0	1413	"including %d bytes of padding",
nexpaq	0:6c56fb4bc5f0	1414	ssl->out_msglen, 0 ) );
nexpaq	0:6c56fb4bc5f0	1415
nexpaq	0:6c56fb4bc5f0	1416	/*
nexpaq	0:6c56fb4bc5f0	1417	* Encrypt and authenticate
nexpaq	0:6c56fb4bc5f0	1418	*/
nexpaq	0:6c56fb4bc5f0	1419	if( ( ret = mbedtls_cipher_auth_encrypt( &ssl->transform_out->cipher_ctx_enc,
nexpaq	0:6c56fb4bc5f0	1420	ssl->transform_out->iv_enc,
nexpaq	0:6c56fb4bc5f0	1421	ssl->transform_out->ivlen,
nexpaq	0:6c56fb4bc5f0	1422	add_data, 13,
nexpaq	0:6c56fb4bc5f0	1423	enc_msg, enc_msglen,
nexpaq	0:6c56fb4bc5f0	1424	enc_msg, &olen,
nexpaq	0:6c56fb4bc5f0	1425	enc_msg + enc_msglen, taglen ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	1426	{
nexpaq	0:6c56fb4bc5f0	1427	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_cipher_auth_encrypt", ret );
nexpaq	0:6c56fb4bc5f0	1428	return( ret );
nexpaq	0:6c56fb4bc5f0	1429	}
nexpaq	0:6c56fb4bc5f0	1430
nexpaq	0:6c56fb4bc5f0	1431	if( olen != enc_msglen )
nexpaq	0:6c56fb4bc5f0	1432	{
nexpaq	0:6c56fb4bc5f0	1433	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
nexpaq	0:6c56fb4bc5f0	1434	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
nexpaq	0:6c56fb4bc5f0	1435	}
nexpaq	0:6c56fb4bc5f0	1436
nexpaq	0:6c56fb4bc5f0	1437	ssl->out_msglen += taglen;
nexpaq	0:6c56fb4bc5f0	1438	auth_done++;
nexpaq	0:6c56fb4bc5f0	1439
nexpaq	0:6c56fb4bc5f0	1440	MBEDTLS_SSL_DEBUG_BUF( 4, "after encrypt: tag", enc_msg + enc_msglen, taglen );
nexpaq	0:6c56fb4bc5f0	1441	}
nexpaq	0:6c56fb4bc5f0	1442	else
nexpaq	0:6c56fb4bc5f0	1443	#endif /* MBEDTLS_GCM_C \|\| MBEDTLS_CCM_C */
nexpaq	0:6c56fb4bc5f0	1444	#if defined(MBEDTLS_CIPHER_MODE_CBC) && \
nexpaq	0:6c56fb4bc5f0	1445	( defined(MBEDTLS_AES_C) \|\| defined(MBEDTLS_CAMELLIA_C) )
nexpaq	0:6c56fb4bc5f0	1446	if( mode == MBEDTLS_MODE_CBC )
nexpaq	0:6c56fb4bc5f0	1447	{
nexpaq	0:6c56fb4bc5f0	1448	int ret;
nexpaq	0:6c56fb4bc5f0	1449	unsigned char *enc_msg;
nexpaq	0:6c56fb4bc5f0	1450	size_t enc_msglen, padlen, olen = 0, i;
nexpaq	0:6c56fb4bc5f0	1451
nexpaq	0:6c56fb4bc5f0	1452	padlen = ssl->transform_out->ivlen - ( ssl->out_msglen + 1 ) %
nexpaq	0:6c56fb4bc5f0	1453	ssl->transform_out->ivlen;
nexpaq	0:6c56fb4bc5f0	1454	if( padlen == ssl->transform_out->ivlen )
nexpaq	0:6c56fb4bc5f0	1455	padlen = 0;
nexpaq	0:6c56fb4bc5f0	1456
nexpaq	0:6c56fb4bc5f0	1457	for( i = 0; i <= padlen; i++ )
nexpaq	0:6c56fb4bc5f0	1458	ssl->out_msg[ssl->out_msglen + i] = (unsigned char) padlen;
nexpaq	0:6c56fb4bc5f0	1459
nexpaq	0:6c56fb4bc5f0	1460	ssl->out_msglen += padlen + 1;
nexpaq	0:6c56fb4bc5f0	1461
nexpaq	0:6c56fb4bc5f0	1462	enc_msglen = ssl->out_msglen;
nexpaq	0:6c56fb4bc5f0	1463	enc_msg = ssl->out_msg;
nexpaq	0:6c56fb4bc5f0	1464
nexpaq	0:6c56fb4bc5f0	1465	#if defined(MBEDTLS_SSL_PROTO_TLS1_1) \|\| defined(MBEDTLS_SSL_PROTO_TLS1_2)
nexpaq	0:6c56fb4bc5f0	1466	/*
nexpaq	0:6c56fb4bc5f0	1467	* Prepend per-record IV for block cipher in TLS v1.1 and up as per
nexpaq	0:6c56fb4bc5f0	1468	* Method 1 (6.2.3.2. in RFC4346 and RFC5246)
nexpaq	0:6c56fb4bc5f0	1469	*/
nexpaq	0:6c56fb4bc5f0	1470	if( ssl->minor_ver >= MBEDTLS_SSL_MINOR_VERSION_2 )
nexpaq	0:6c56fb4bc5f0	1471	{
nexpaq	0:6c56fb4bc5f0	1472	/*
nexpaq	0:6c56fb4bc5f0	1473	* Generate IV
nexpaq	0:6c56fb4bc5f0	1474	*/
nexpaq	0:6c56fb4bc5f0	1475	ret = ssl->conf->f_rng( ssl->conf->p_rng, ssl->transform_out->iv_enc,
nexpaq	0:6c56fb4bc5f0	1476	ssl->transform_out->ivlen );
nexpaq	0:6c56fb4bc5f0	1477	if( ret != 0 )
nexpaq	0:6c56fb4bc5f0	1478	return( ret );
nexpaq	0:6c56fb4bc5f0	1479
nexpaq	0:6c56fb4bc5f0	1480	memcpy( ssl->out_iv, ssl->transform_out->iv_enc,
nexpaq	0:6c56fb4bc5f0	1481	ssl->transform_out->ivlen );
nexpaq	0:6c56fb4bc5f0	1482
nexpaq	0:6c56fb4bc5f0	1483	/*
nexpaq	0:6c56fb4bc5f0	1484	* Fix pointer positions and message length with added IV
nexpaq	0:6c56fb4bc5f0	1485	*/
nexpaq	0:6c56fb4bc5f0	1486	enc_msg = ssl->out_msg;
nexpaq	0:6c56fb4bc5f0	1487	enc_msglen = ssl->out_msglen;
nexpaq	0:6c56fb4bc5f0	1488	ssl->out_msglen += ssl->transform_out->ivlen;
nexpaq	0:6c56fb4bc5f0	1489	}
nexpaq	0:6c56fb4bc5f0	1490	#endif /* MBEDTLS_SSL_PROTO_TLS1_1 \|\| MBEDTLS_SSL_PROTO_TLS1_2 */
nexpaq	0:6c56fb4bc5f0	1491
nexpaq	0:6c56fb4bc5f0	1492	MBEDTLS_SSL_DEBUG_MSG( 3, ( "before encrypt: msglen = %d, "
nexpaq	0:6c56fb4bc5f0	1493	"including %d bytes of IV and %d bytes of padding",
nexpaq	0:6c56fb4bc5f0	1494	ssl->out_msglen, ssl->transform_out->ivlen,
nexpaq	0:6c56fb4bc5f0	1495	padlen + 1 ) );
nexpaq	0:6c56fb4bc5f0	1496
nexpaq	0:6c56fb4bc5f0	1497	if( ( ret = mbedtls_cipher_crypt( &ssl->transform_out->cipher_ctx_enc,
nexpaq	0:6c56fb4bc5f0	1498	ssl->transform_out->iv_enc,
nexpaq	0:6c56fb4bc5f0	1499	ssl->transform_out->ivlen,
nexpaq	0:6c56fb4bc5f0	1500	enc_msg, enc_msglen,
nexpaq	0:6c56fb4bc5f0	1501	enc_msg, &olen ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	1502	{
nexpaq	0:6c56fb4bc5f0	1503	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_cipher_crypt", ret );
nexpaq	0:6c56fb4bc5f0	1504	return( ret );
nexpaq	0:6c56fb4bc5f0	1505	}
nexpaq	0:6c56fb4bc5f0	1506
nexpaq	0:6c56fb4bc5f0	1507	if( enc_msglen != olen )
nexpaq	0:6c56fb4bc5f0	1508	{
nexpaq	0:6c56fb4bc5f0	1509	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
nexpaq	0:6c56fb4bc5f0	1510	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
nexpaq	0:6c56fb4bc5f0	1511	}
nexpaq	0:6c56fb4bc5f0	1512
nexpaq	0:6c56fb4bc5f0	1513	#if defined(MBEDTLS_SSL_PROTO_SSL3) \|\| defined(MBEDTLS_SSL_PROTO_TLS1)
nexpaq	0:6c56fb4bc5f0	1514	if( ssl->minor_ver < MBEDTLS_SSL_MINOR_VERSION_2 )
nexpaq	0:6c56fb4bc5f0	1515	{
nexpaq	0:6c56fb4bc5f0	1516	/*
nexpaq	0:6c56fb4bc5f0	1517	* Save IV in SSL3 and TLS1
nexpaq	0:6c56fb4bc5f0	1518	*/
nexpaq	0:6c56fb4bc5f0	1519	memcpy( ssl->transform_out->iv_enc,
nexpaq	0:6c56fb4bc5f0	1520	ssl->transform_out->cipher_ctx_enc.iv,
nexpaq	0:6c56fb4bc5f0	1521	ssl->transform_out->ivlen );
nexpaq	0:6c56fb4bc5f0	1522	}
nexpaq	0:6c56fb4bc5f0	1523	#endif
nexpaq	0:6c56fb4bc5f0	1524
nexpaq	0:6c56fb4bc5f0	1525	#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
nexpaq	0:6c56fb4bc5f0	1526	if( auth_done == 0 )
nexpaq	0:6c56fb4bc5f0	1527	{
nexpaq	0:6c56fb4bc5f0	1528	/*
nexpaq	0:6c56fb4bc5f0	1529	* MAC(MAC_write_key, seq_num +
nexpaq	0:6c56fb4bc5f0	1530	* TLSCipherText.type +
nexpaq	0:6c56fb4bc5f0	1531	* TLSCipherText.version +
nexpaq	0:6c56fb4bc5f0	1532	* length_of( (IV +) ENC(...) ) +
nexpaq	0:6c56fb4bc5f0	1533	* IV + // except for TLS 1.0
nexpaq	0:6c56fb4bc5f0	1534	* ENC(content + padding + padding_length));
nexpaq	0:6c56fb4bc5f0	1535	*/
nexpaq	0:6c56fb4bc5f0	1536	unsigned char pseudo_hdr[13];
nexpaq	0:6c56fb4bc5f0	1537
nexpaq	0:6c56fb4bc5f0	1538	MBEDTLS_SSL_DEBUG_MSG( 3, ( "using encrypt then mac" ) );
nexpaq	0:6c56fb4bc5f0	1539
nexpaq	0:6c56fb4bc5f0	1540	memcpy( pseudo_hdr + 0, ssl->out_ctr, 8 );
nexpaq	0:6c56fb4bc5f0	1541	memcpy( pseudo_hdr + 8, ssl->out_hdr, 3 );
nexpaq	0:6c56fb4bc5f0	1542	pseudo_hdr[11] = (unsigned char)( ( ssl->out_msglen >> 8 ) & 0xFF );
nexpaq	0:6c56fb4bc5f0	1543	pseudo_hdr[12] = (unsigned char)( ( ssl->out_msglen ) & 0xFF );
nexpaq	0:6c56fb4bc5f0	1544
nexpaq	0:6c56fb4bc5f0	1545	MBEDTLS_SSL_DEBUG_BUF( 4, "MAC'd meta-data", pseudo_hdr, 13 );
nexpaq	0:6c56fb4bc5f0	1546
nexpaq	0:6c56fb4bc5f0	1547	mbedtls_md_hmac_update( &ssl->transform_out->md_ctx_enc, pseudo_hdr, 13 );
nexpaq	0:6c56fb4bc5f0	1548	mbedtls_md_hmac_update( &ssl->transform_out->md_ctx_enc,
nexpaq	0:6c56fb4bc5f0	1549	ssl->out_iv, ssl->out_msglen );
nexpaq	0:6c56fb4bc5f0	1550	mbedtls_md_hmac_finish( &ssl->transform_out->md_ctx_enc,
nexpaq	0:6c56fb4bc5f0	1551	ssl->out_iv + ssl->out_msglen );
nexpaq	0:6c56fb4bc5f0	1552	mbedtls_md_hmac_reset( &ssl->transform_out->md_ctx_enc );
nexpaq	0:6c56fb4bc5f0	1553
nexpaq	0:6c56fb4bc5f0	1554	ssl->out_msglen += ssl->transform_out->maclen;
nexpaq	0:6c56fb4bc5f0	1555	auth_done++;
nexpaq	0:6c56fb4bc5f0	1556	}
nexpaq	0:6c56fb4bc5f0	1557	#endif /* MBEDTLS_SSL_ENCRYPT_THEN_MAC */
nexpaq	0:6c56fb4bc5f0	1558	}
nexpaq	0:6c56fb4bc5f0	1559	else
nexpaq	0:6c56fb4bc5f0	1560	#endif /* MBEDTLS_CIPHER_MODE_CBC &&
nexpaq	0:6c56fb4bc5f0	1561	( MBEDTLS_AES_C \|\| MBEDTLS_CAMELLIA_C ) */
nexpaq	0:6c56fb4bc5f0	1562	{
nexpaq	0:6c56fb4bc5f0	1563	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
nexpaq	0:6c56fb4bc5f0	1564	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
nexpaq	0:6c56fb4bc5f0	1565	}
nexpaq	0:6c56fb4bc5f0	1566
nexpaq	0:6c56fb4bc5f0	1567	/* Make extra sure authentication was performed, exactly once */
nexpaq	0:6c56fb4bc5f0	1568	if( auth_done != 1 )
nexpaq	0:6c56fb4bc5f0	1569	{
nexpaq	0:6c56fb4bc5f0	1570	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
nexpaq	0:6c56fb4bc5f0	1571	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
nexpaq	0:6c56fb4bc5f0	1572	}
nexpaq	0:6c56fb4bc5f0	1573
nexpaq	0:6c56fb4bc5f0	1574	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= encrypt buf" ) );
nexpaq	0:6c56fb4bc5f0	1575
nexpaq	0:6c56fb4bc5f0	1576	return( 0 );
nexpaq	0:6c56fb4bc5f0	1577	}
nexpaq	0:6c56fb4bc5f0	1578
nexpaq	0:6c56fb4bc5f0	1579	#define SSL_MAX_MAC_SIZE 48
nexpaq	0:6c56fb4bc5f0	1580
nexpaq	0:6c56fb4bc5f0	1581	static int ssl_decrypt_buf( mbedtls_ssl_context *ssl )
nexpaq	0:6c56fb4bc5f0	1582	{
nexpaq	0:6c56fb4bc5f0	1583	size_t i;
nexpaq	0:6c56fb4bc5f0	1584	mbedtls_cipher_mode_t mode;
nexpaq	0:6c56fb4bc5f0	1585	int auth_done = 0;
nexpaq	0:6c56fb4bc5f0	1586	#if defined(SSL_SOME_MODES_USE_MAC)
nexpaq	0:6c56fb4bc5f0	1587	size_t padlen = 0, correct = 1;
nexpaq	0:6c56fb4bc5f0	1588	#endif
nexpaq	0:6c56fb4bc5f0	1589
nexpaq	0:6c56fb4bc5f0	1590	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> decrypt buf" ) );
nexpaq	0:6c56fb4bc5f0	1591
nexpaq	0:6c56fb4bc5f0	1592	if( ssl->session_in == NULL \|\| ssl->transform_in == NULL )
nexpaq	0:6c56fb4bc5f0	1593	{
nexpaq	0:6c56fb4bc5f0	1594	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
nexpaq	0:6c56fb4bc5f0	1595	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
nexpaq	0:6c56fb4bc5f0	1596	}
nexpaq	0:6c56fb4bc5f0	1597
nexpaq	0:6c56fb4bc5f0	1598	mode = mbedtls_cipher_get_cipher_mode( &ssl->transform_in->cipher_ctx_dec );
nexpaq	0:6c56fb4bc5f0	1599
nexpaq	0:6c56fb4bc5f0	1600	if( ssl->in_msglen < ssl->transform_in->minlen )
nexpaq	0:6c56fb4bc5f0	1601	{
nexpaq	0:6c56fb4bc5f0	1602	MBEDTLS_SSL_DEBUG_MSG( 1, ( "in_msglen (%d) < minlen (%d)",
nexpaq	0:6c56fb4bc5f0	1603	ssl->in_msglen, ssl->transform_in->minlen ) );
nexpaq	0:6c56fb4bc5f0	1604	return( MBEDTLS_ERR_SSL_INVALID_MAC );
nexpaq	0:6c56fb4bc5f0	1605	}
nexpaq	0:6c56fb4bc5f0	1606
nexpaq	0:6c56fb4bc5f0	1607	#if defined(MBEDTLS_ARC4_C) \|\| defined(MBEDTLS_CIPHER_NULL_CIPHER)
nexpaq	0:6c56fb4bc5f0	1608	if( mode == MBEDTLS_MODE_STREAM )
nexpaq	0:6c56fb4bc5f0	1609	{
nexpaq	0:6c56fb4bc5f0	1610	int ret;
nexpaq	0:6c56fb4bc5f0	1611	size_t olen = 0;
nexpaq	0:6c56fb4bc5f0	1612
nexpaq	0:6c56fb4bc5f0	1613	padlen = 0;
nexpaq	0:6c56fb4bc5f0	1614
nexpaq	0:6c56fb4bc5f0	1615	if( ( ret = mbedtls_cipher_crypt( &ssl->transform_in->cipher_ctx_dec,
nexpaq	0:6c56fb4bc5f0	1616	ssl->transform_in->iv_dec,
nexpaq	0:6c56fb4bc5f0	1617	ssl->transform_in->ivlen,
nexpaq	0:6c56fb4bc5f0	1618	ssl->in_msg, ssl->in_msglen,
nexpaq	0:6c56fb4bc5f0	1619	ssl->in_msg, &olen ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	1620	{
nexpaq	0:6c56fb4bc5f0	1621	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_cipher_crypt", ret );
nexpaq	0:6c56fb4bc5f0	1622	return( ret );
nexpaq	0:6c56fb4bc5f0	1623	}
nexpaq	0:6c56fb4bc5f0	1624
nexpaq	0:6c56fb4bc5f0	1625	if( ssl->in_msglen != olen )
nexpaq	0:6c56fb4bc5f0	1626	{
nexpaq	0:6c56fb4bc5f0	1627	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
nexpaq	0:6c56fb4bc5f0	1628	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
nexpaq	0:6c56fb4bc5f0	1629	}
nexpaq	0:6c56fb4bc5f0	1630	}
nexpaq	0:6c56fb4bc5f0	1631	else
nexpaq	0:6c56fb4bc5f0	1632	#endif /* MBEDTLS_ARC4_C \|\| MBEDTLS_CIPHER_NULL_CIPHER */
nexpaq	0:6c56fb4bc5f0	1633	#if defined(MBEDTLS_GCM_C) \|\| defined(MBEDTLS_CCM_C)
nexpaq	0:6c56fb4bc5f0	1634	if( mode == MBEDTLS_MODE_GCM \|\|
nexpaq	0:6c56fb4bc5f0	1635	mode == MBEDTLS_MODE_CCM )
nexpaq	0:6c56fb4bc5f0	1636	{
nexpaq	0:6c56fb4bc5f0	1637	int ret;
nexpaq	0:6c56fb4bc5f0	1638	size_t dec_msglen, olen;
nexpaq	0:6c56fb4bc5f0	1639	unsigned char *dec_msg;
nexpaq	0:6c56fb4bc5f0	1640	unsigned char *dec_msg_result;
nexpaq	0:6c56fb4bc5f0	1641	unsigned char add_data[13];
nexpaq	0:6c56fb4bc5f0	1642	unsigned char taglen = ssl->transform_in->ciphersuite_info->flags &
nexpaq	0:6c56fb4bc5f0	1643	MBEDTLS_CIPHERSUITE_SHORT_TAG ? 8 : 16;
nexpaq	0:6c56fb4bc5f0	1644	size_t explicit_iv_len = ssl->transform_in->ivlen -
nexpaq	0:6c56fb4bc5f0	1645	ssl->transform_in->fixed_ivlen;
nexpaq	0:6c56fb4bc5f0	1646
nexpaq	0:6c56fb4bc5f0	1647	if( ssl->in_msglen < explicit_iv_len + taglen )
nexpaq	0:6c56fb4bc5f0	1648	{
nexpaq	0:6c56fb4bc5f0	1649	MBEDTLS_SSL_DEBUG_MSG( 1, ( "msglen (%d) < explicit_iv_len (%d) "
nexpaq	0:6c56fb4bc5f0	1650	"+ taglen (%d)", ssl->in_msglen,
nexpaq	0:6c56fb4bc5f0	1651	explicit_iv_len, taglen ) );
nexpaq	0:6c56fb4bc5f0	1652	return( MBEDTLS_ERR_SSL_INVALID_MAC );
nexpaq	0:6c56fb4bc5f0	1653	}
nexpaq	0:6c56fb4bc5f0	1654	dec_msglen = ssl->in_msglen - explicit_iv_len - taglen;
nexpaq	0:6c56fb4bc5f0	1655
nexpaq	0:6c56fb4bc5f0	1656	dec_msg = ssl->in_msg;
nexpaq	0:6c56fb4bc5f0	1657	dec_msg_result = ssl->in_msg;
nexpaq	0:6c56fb4bc5f0	1658	ssl->in_msglen = dec_msglen;
nexpaq	0:6c56fb4bc5f0	1659
nexpaq	0:6c56fb4bc5f0	1660	memcpy( add_data, ssl->in_ctr, 8 );
nexpaq	0:6c56fb4bc5f0	1661	add_data[8] = ssl->in_msgtype;
nexpaq	0:6c56fb4bc5f0	1662	mbedtls_ssl_write_version( ssl->major_ver, ssl->minor_ver,
nexpaq	0:6c56fb4bc5f0	1663	ssl->conf->transport, add_data + 9 );
nexpaq	0:6c56fb4bc5f0	1664	add_data[11] = ( ssl->in_msglen >> 8 ) & 0xFF;
nexpaq	0:6c56fb4bc5f0	1665	add_data[12] = ssl->in_msglen & 0xFF;
nexpaq	0:6c56fb4bc5f0	1666
nexpaq	0:6c56fb4bc5f0	1667	MBEDTLS_SSL_DEBUG_BUF( 4, "additional data used for AEAD",
nexpaq	0:6c56fb4bc5f0	1668	add_data, 13 );
nexpaq	0:6c56fb4bc5f0	1669
nexpaq	0:6c56fb4bc5f0	1670	memcpy( ssl->transform_in->iv_dec + ssl->transform_in->fixed_ivlen,
nexpaq	0:6c56fb4bc5f0	1671	ssl->in_iv,
nexpaq	0:6c56fb4bc5f0	1672	ssl->transform_in->ivlen - ssl->transform_in->fixed_ivlen );
nexpaq	0:6c56fb4bc5f0	1673
nexpaq	0:6c56fb4bc5f0	1674	MBEDTLS_SSL_DEBUG_BUF( 4, "IV used", ssl->transform_in->iv_dec,
nexpaq	0:6c56fb4bc5f0	1675	ssl->transform_in->ivlen );
nexpaq	0:6c56fb4bc5f0	1676	MBEDTLS_SSL_DEBUG_BUF( 4, "TAG used", dec_msg + dec_msglen, taglen );
nexpaq	0:6c56fb4bc5f0	1677
nexpaq	0:6c56fb4bc5f0	1678	/*
nexpaq	0:6c56fb4bc5f0	1679	* Decrypt and authenticate
nexpaq	0:6c56fb4bc5f0	1680	*/
nexpaq	0:6c56fb4bc5f0	1681	if( ( ret = mbedtls_cipher_auth_decrypt( &ssl->transform_in->cipher_ctx_dec,
nexpaq	0:6c56fb4bc5f0	1682	ssl->transform_in->iv_dec,
nexpaq	0:6c56fb4bc5f0	1683	ssl->transform_in->ivlen,
nexpaq	0:6c56fb4bc5f0	1684	add_data, 13,
nexpaq	0:6c56fb4bc5f0	1685	dec_msg, dec_msglen,
nexpaq	0:6c56fb4bc5f0	1686	dec_msg_result, &olen,
nexpaq	0:6c56fb4bc5f0	1687	dec_msg + dec_msglen, taglen ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	1688	{
nexpaq	0:6c56fb4bc5f0	1689	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_cipher_auth_decrypt", ret );
nexpaq	0:6c56fb4bc5f0	1690
nexpaq	0:6c56fb4bc5f0	1691	if( ret == MBEDTLS_ERR_CIPHER_AUTH_FAILED )
nexpaq	0:6c56fb4bc5f0	1692	return( MBEDTLS_ERR_SSL_INVALID_MAC );
nexpaq	0:6c56fb4bc5f0	1693
nexpaq	0:6c56fb4bc5f0	1694	return( ret );
nexpaq	0:6c56fb4bc5f0	1695	}
nexpaq	0:6c56fb4bc5f0	1696	auth_done++;
nexpaq	0:6c56fb4bc5f0	1697
nexpaq	0:6c56fb4bc5f0	1698	if( olen != dec_msglen )
nexpaq	0:6c56fb4bc5f0	1699	{
nexpaq	0:6c56fb4bc5f0	1700	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
nexpaq	0:6c56fb4bc5f0	1701	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
nexpaq	0:6c56fb4bc5f0	1702	}
nexpaq	0:6c56fb4bc5f0	1703	}
nexpaq	0:6c56fb4bc5f0	1704	else
nexpaq	0:6c56fb4bc5f0	1705	#endif /* MBEDTLS_GCM_C \|\| MBEDTLS_CCM_C */
nexpaq	0:6c56fb4bc5f0	1706	#if defined(MBEDTLS_CIPHER_MODE_CBC) && \
nexpaq	0:6c56fb4bc5f0	1707	( defined(MBEDTLS_AES_C) \|\| defined(MBEDTLS_CAMELLIA_C) )
nexpaq	0:6c56fb4bc5f0	1708	if( mode == MBEDTLS_MODE_CBC )
nexpaq	0:6c56fb4bc5f0	1709	{
nexpaq	0:6c56fb4bc5f0	1710	/*
nexpaq	0:6c56fb4bc5f0	1711	* Decrypt and check the padding
nexpaq	0:6c56fb4bc5f0	1712	*/
nexpaq	0:6c56fb4bc5f0	1713	int ret;
nexpaq	0:6c56fb4bc5f0	1714	unsigned char *dec_msg;
nexpaq	0:6c56fb4bc5f0	1715	unsigned char *dec_msg_result;
nexpaq	0:6c56fb4bc5f0	1716	size_t dec_msglen;
nexpaq	0:6c56fb4bc5f0	1717	size_t minlen = 0;
nexpaq	0:6c56fb4bc5f0	1718	size_t olen = 0;
nexpaq	0:6c56fb4bc5f0	1719
nexpaq	0:6c56fb4bc5f0	1720	/*
nexpaq	0:6c56fb4bc5f0	1721	* Check immediate ciphertext sanity
nexpaq	0:6c56fb4bc5f0	1722	*/
nexpaq	0:6c56fb4bc5f0	1723	#if defined(MBEDTLS_SSL_PROTO_TLS1_1) \|\| defined(MBEDTLS_SSL_PROTO_TLS1_2)
nexpaq	0:6c56fb4bc5f0	1724	if( ssl->minor_ver >= MBEDTLS_SSL_MINOR_VERSION_2 )
nexpaq	0:6c56fb4bc5f0	1725	minlen += ssl->transform_in->ivlen;
nexpaq	0:6c56fb4bc5f0	1726	#endif
nexpaq	0:6c56fb4bc5f0	1727
nexpaq	0:6c56fb4bc5f0	1728	if( ssl->in_msglen < minlen + ssl->transform_in->ivlen \|\|
nexpaq	0:6c56fb4bc5f0	1729	ssl->in_msglen < minlen + ssl->transform_in->maclen + 1 )
nexpaq	0:6c56fb4bc5f0	1730	{
nexpaq	0:6c56fb4bc5f0	1731	MBEDTLS_SSL_DEBUG_MSG( 1, ( "msglen (%d) < max( ivlen(%d), maclen (%d) "
nexpaq	0:6c56fb4bc5f0	1732	"+ 1 ) ( + expl IV )", ssl->in_msglen,
nexpaq	0:6c56fb4bc5f0	1733	ssl->transform_in->ivlen,
nexpaq	0:6c56fb4bc5f0	1734	ssl->transform_in->maclen ) );
nexpaq	0:6c56fb4bc5f0	1735	return( MBEDTLS_ERR_SSL_INVALID_MAC );
nexpaq	0:6c56fb4bc5f0	1736	}
nexpaq	0:6c56fb4bc5f0	1737
nexpaq	0:6c56fb4bc5f0	1738	dec_msglen = ssl->in_msglen;
nexpaq	0:6c56fb4bc5f0	1739	dec_msg = ssl->in_msg;
nexpaq	0:6c56fb4bc5f0	1740	dec_msg_result = ssl->in_msg;
nexpaq	0:6c56fb4bc5f0	1741
nexpaq	0:6c56fb4bc5f0	1742	/*
nexpaq	0:6c56fb4bc5f0	1743	* Authenticate before decrypt if enabled
nexpaq	0:6c56fb4bc5f0	1744	*/
nexpaq	0:6c56fb4bc5f0	1745	#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
nexpaq	0:6c56fb4bc5f0	1746	if( ssl->session_in->encrypt_then_mac == MBEDTLS_SSL_ETM_ENABLED )
nexpaq	0:6c56fb4bc5f0	1747	{
nexpaq	0:6c56fb4bc5f0	1748	unsigned char computed_mac[SSL_MAX_MAC_SIZE];
nexpaq	0:6c56fb4bc5f0	1749	unsigned char pseudo_hdr[13];
nexpaq	0:6c56fb4bc5f0	1750
nexpaq	0:6c56fb4bc5f0	1751	MBEDTLS_SSL_DEBUG_MSG( 3, ( "using encrypt then mac" ) );
nexpaq	0:6c56fb4bc5f0	1752
nexpaq	0:6c56fb4bc5f0	1753	dec_msglen -= ssl->transform_in->maclen;
nexpaq	0:6c56fb4bc5f0	1754	ssl->in_msglen -= ssl->transform_in->maclen;
nexpaq	0:6c56fb4bc5f0	1755
nexpaq	0:6c56fb4bc5f0	1756	memcpy( pseudo_hdr + 0, ssl->in_ctr, 8 );
nexpaq	0:6c56fb4bc5f0	1757	memcpy( pseudo_hdr + 8, ssl->in_hdr, 3 );
nexpaq	0:6c56fb4bc5f0	1758	pseudo_hdr[11] = (unsigned char)( ( ssl->in_msglen >> 8 ) & 0xFF );
nexpaq	0:6c56fb4bc5f0	1759	pseudo_hdr[12] = (unsigned char)( ( ssl->in_msglen ) & 0xFF );
nexpaq	0:6c56fb4bc5f0	1760
nexpaq	0:6c56fb4bc5f0	1761	MBEDTLS_SSL_DEBUG_BUF( 4, "MAC'd meta-data", pseudo_hdr, 13 );
nexpaq	0:6c56fb4bc5f0	1762
nexpaq	0:6c56fb4bc5f0	1763	mbedtls_md_hmac_update( &ssl->transform_in->md_ctx_dec, pseudo_hdr, 13 );
nexpaq	0:6c56fb4bc5f0	1764	mbedtls_md_hmac_update( &ssl->transform_in->md_ctx_dec,
nexpaq	0:6c56fb4bc5f0	1765	ssl->in_iv, ssl->in_msglen );
nexpaq	0:6c56fb4bc5f0	1766	mbedtls_md_hmac_finish( &ssl->transform_in->md_ctx_dec, computed_mac );
nexpaq	0:6c56fb4bc5f0	1767	mbedtls_md_hmac_reset( &ssl->transform_in->md_ctx_dec );
nexpaq	0:6c56fb4bc5f0	1768
nexpaq	0:6c56fb4bc5f0	1769	MBEDTLS_SSL_DEBUG_BUF( 4, "message mac", ssl->in_iv + ssl->in_msglen,
nexpaq	0:6c56fb4bc5f0	1770	ssl->transform_in->maclen );
nexpaq	0:6c56fb4bc5f0	1771	MBEDTLS_SSL_DEBUG_BUF( 4, "computed mac", computed_mac,
nexpaq	0:6c56fb4bc5f0	1772	ssl->transform_in->maclen );
nexpaq	0:6c56fb4bc5f0	1773
nexpaq	0:6c56fb4bc5f0	1774	if( mbedtls_ssl_safer_memcmp( ssl->in_iv + ssl->in_msglen, computed_mac,
nexpaq	0:6c56fb4bc5f0	1775	ssl->transform_in->maclen ) != 0 )
nexpaq	0:6c56fb4bc5f0	1776	{
nexpaq	0:6c56fb4bc5f0	1777	MBEDTLS_SSL_DEBUG_MSG( 1, ( "message mac does not match" ) );
nexpaq	0:6c56fb4bc5f0	1778
nexpaq	0:6c56fb4bc5f0	1779	return( MBEDTLS_ERR_SSL_INVALID_MAC );
nexpaq	0:6c56fb4bc5f0	1780	}
nexpaq	0:6c56fb4bc5f0	1781	auth_done++;
nexpaq	0:6c56fb4bc5f0	1782	}
nexpaq	0:6c56fb4bc5f0	1783	#endif /* MBEDTLS_SSL_ENCRYPT_THEN_MAC */
nexpaq	0:6c56fb4bc5f0	1784
nexpaq	0:6c56fb4bc5f0	1785	/*
nexpaq	0:6c56fb4bc5f0	1786	* Check length sanity
nexpaq	0:6c56fb4bc5f0	1787	*/
nexpaq	0:6c56fb4bc5f0	1788	if( ssl->in_msglen % ssl->transform_in->ivlen != 0 )
nexpaq	0:6c56fb4bc5f0	1789	{
nexpaq	0:6c56fb4bc5f0	1790	MBEDTLS_SSL_DEBUG_MSG( 1, ( "msglen (%d) %% ivlen (%d) != 0",
nexpaq	0:6c56fb4bc5f0	1791	ssl->in_msglen, ssl->transform_in->ivlen ) );
nexpaq	0:6c56fb4bc5f0	1792	return( MBEDTLS_ERR_SSL_INVALID_MAC );
nexpaq	0:6c56fb4bc5f0	1793	}
nexpaq	0:6c56fb4bc5f0	1794
nexpaq	0:6c56fb4bc5f0	1795	#if defined(MBEDTLS_SSL_PROTO_TLS1_1) \|\| defined(MBEDTLS_SSL_PROTO_TLS1_2)
nexpaq	0:6c56fb4bc5f0	1796	/*
nexpaq	0:6c56fb4bc5f0	1797	* Initialize for prepended IV for block cipher in TLS v1.1 and up
nexpaq	0:6c56fb4bc5f0	1798	*/
nexpaq	0:6c56fb4bc5f0	1799	if( ssl->minor_ver >= MBEDTLS_SSL_MINOR_VERSION_2 )
nexpaq	0:6c56fb4bc5f0	1800	{
nexpaq	0:6c56fb4bc5f0	1801	dec_msglen -= ssl->transform_in->ivlen;
nexpaq	0:6c56fb4bc5f0	1802	ssl->in_msglen -= ssl->transform_in->ivlen;
nexpaq	0:6c56fb4bc5f0	1803
nexpaq	0:6c56fb4bc5f0	1804	for( i = 0; i < ssl->transform_in->ivlen; i++ )
nexpaq	0:6c56fb4bc5f0	1805	ssl->transform_in->iv_dec[i] = ssl->in_iv[i];
nexpaq	0:6c56fb4bc5f0	1806	}
nexpaq	0:6c56fb4bc5f0	1807	#endif /* MBEDTLS_SSL_PROTO_TLS1_1 \|\| MBEDTLS_SSL_PROTO_TLS1_2 */
nexpaq	0:6c56fb4bc5f0	1808
nexpaq	0:6c56fb4bc5f0	1809	if( ( ret = mbedtls_cipher_crypt( &ssl->transform_in->cipher_ctx_dec,
nexpaq	0:6c56fb4bc5f0	1810	ssl->transform_in->iv_dec,
nexpaq	0:6c56fb4bc5f0	1811	ssl->transform_in->ivlen,
nexpaq	0:6c56fb4bc5f0	1812	dec_msg, dec_msglen,
nexpaq	0:6c56fb4bc5f0	1813	dec_msg_result, &olen ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	1814	{
nexpaq	0:6c56fb4bc5f0	1815	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_cipher_crypt", ret );
nexpaq	0:6c56fb4bc5f0	1816	return( ret );
nexpaq	0:6c56fb4bc5f0	1817	}
nexpaq	0:6c56fb4bc5f0	1818
nexpaq	0:6c56fb4bc5f0	1819	if( dec_msglen != olen )
nexpaq	0:6c56fb4bc5f0	1820	{
nexpaq	0:6c56fb4bc5f0	1821	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
nexpaq	0:6c56fb4bc5f0	1822	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
nexpaq	0:6c56fb4bc5f0	1823	}
nexpaq	0:6c56fb4bc5f0	1824
nexpaq	0:6c56fb4bc5f0	1825	#if defined(MBEDTLS_SSL_PROTO_SSL3) \|\| defined(MBEDTLS_SSL_PROTO_TLS1)
nexpaq	0:6c56fb4bc5f0	1826	if( ssl->minor_ver < MBEDTLS_SSL_MINOR_VERSION_2 )
nexpaq	0:6c56fb4bc5f0	1827	{
nexpaq	0:6c56fb4bc5f0	1828	/*
nexpaq	0:6c56fb4bc5f0	1829	* Save IV in SSL3 and TLS1
nexpaq	0:6c56fb4bc5f0	1830	*/
nexpaq	0:6c56fb4bc5f0	1831	memcpy( ssl->transform_in->iv_dec,
nexpaq	0:6c56fb4bc5f0	1832	ssl->transform_in->cipher_ctx_dec.iv,
nexpaq	0:6c56fb4bc5f0	1833	ssl->transform_in->ivlen );
nexpaq	0:6c56fb4bc5f0	1834	}
nexpaq	0:6c56fb4bc5f0	1835	#endif
nexpaq	0:6c56fb4bc5f0	1836
nexpaq	0:6c56fb4bc5f0	1837	padlen = 1 + ssl->in_msg[ssl->in_msglen - 1];
nexpaq	0:6c56fb4bc5f0	1838
nexpaq	0:6c56fb4bc5f0	1839	if( ssl->in_msglen < ssl->transform_in->maclen + padlen &&
nexpaq	0:6c56fb4bc5f0	1840	auth_done == 0 )
nexpaq	0:6c56fb4bc5f0	1841	{
nexpaq	0:6c56fb4bc5f0	1842	#if defined(MBEDTLS_SSL_DEBUG_ALL)
nexpaq	0:6c56fb4bc5f0	1843	MBEDTLS_SSL_DEBUG_MSG( 1, ( "msglen (%d) < maclen (%d) + padlen (%d)",
nexpaq	0:6c56fb4bc5f0	1844	ssl->in_msglen, ssl->transform_in->maclen, padlen ) );
nexpaq	0:6c56fb4bc5f0	1845	#endif
nexpaq	0:6c56fb4bc5f0	1846	padlen = 0;
nexpaq	0:6c56fb4bc5f0	1847	correct = 0;
nexpaq	0:6c56fb4bc5f0	1848	}
nexpaq	0:6c56fb4bc5f0	1849
nexpaq	0:6c56fb4bc5f0	1850	#if defined(MBEDTLS_SSL_PROTO_SSL3)
nexpaq	0:6c56fb4bc5f0	1851	if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 )
nexpaq	0:6c56fb4bc5f0	1852	{
nexpaq	0:6c56fb4bc5f0	1853	if( padlen > ssl->transform_in->ivlen )
nexpaq	0:6c56fb4bc5f0	1854	{
nexpaq	0:6c56fb4bc5f0	1855	#if defined(MBEDTLS_SSL_DEBUG_ALL)
nexpaq	0:6c56fb4bc5f0	1856	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad padding length: is %d, "
nexpaq	0:6c56fb4bc5f0	1857	"should be no more than %d",
nexpaq	0:6c56fb4bc5f0	1858	padlen, ssl->transform_in->ivlen ) );
nexpaq	0:6c56fb4bc5f0	1859	#endif
nexpaq	0:6c56fb4bc5f0	1860	correct = 0;
nexpaq	0:6c56fb4bc5f0	1861	}
nexpaq	0:6c56fb4bc5f0	1862	}
nexpaq	0:6c56fb4bc5f0	1863	else
nexpaq	0:6c56fb4bc5f0	1864	#endif /* MBEDTLS_SSL_PROTO_SSL3 */
nexpaq	0:6c56fb4bc5f0	1865	#if defined(MBEDTLS_SSL_PROTO_TLS1) \|\| defined(MBEDTLS_SSL_PROTO_TLS1_1) \|\| \
nexpaq	0:6c56fb4bc5f0	1866	defined(MBEDTLS_SSL_PROTO_TLS1_2)
nexpaq	0:6c56fb4bc5f0	1867	if( ssl->minor_ver > MBEDTLS_SSL_MINOR_VERSION_0 )
nexpaq	0:6c56fb4bc5f0	1868	{
nexpaq	0:6c56fb4bc5f0	1869	/*
nexpaq	0:6c56fb4bc5f0	1870	* TLSv1+: always check the padding up to the first failure
nexpaq	0:6c56fb4bc5f0	1871	* and fake check up to 256 bytes of padding
nexpaq	0:6c56fb4bc5f0	1872	*/
nexpaq	0:6c56fb4bc5f0	1873	size_t pad_count = 0, real_count = 1;
nexpaq	0:6c56fb4bc5f0	1874	size_t padding_idx = ssl->in_msglen - padlen - 1;
nexpaq	0:6c56fb4bc5f0	1875
nexpaq	0:6c56fb4bc5f0	1876	/*
nexpaq	0:6c56fb4bc5f0	1877	* Padding is guaranteed to be incorrect if:
nexpaq	0:6c56fb4bc5f0	1878	* 1. padlen >= ssl->in_msglen
nexpaq	0:6c56fb4bc5f0	1879	*
nexpaq	0:6c56fb4bc5f0	1880	* 2. padding_idx >= MBEDTLS_SSL_MAX_CONTENT_LEN +
nexpaq	0:6c56fb4bc5f0	1881	* ssl->transform_in->maclen
nexpaq	0:6c56fb4bc5f0	1882	*
nexpaq	0:6c56fb4bc5f0	1883	* In both cases we reset padding_idx to a safe value (0) to
nexpaq	0:6c56fb4bc5f0	1884	* prevent out-of-buffer reads.
nexpaq	0:6c56fb4bc5f0	1885	*/
nexpaq	0:6c56fb4bc5f0	1886	correct &= ( ssl->in_msglen >= padlen + 1 );
nexpaq	0:6c56fb4bc5f0	1887	correct &= ( padding_idx < MBEDTLS_SSL_MAX_CONTENT_LEN +
nexpaq	0:6c56fb4bc5f0	1888	ssl->transform_in->maclen );
nexpaq	0:6c56fb4bc5f0	1889
nexpaq	0:6c56fb4bc5f0	1890	padding_idx *= correct;
nexpaq	0:6c56fb4bc5f0	1891
nexpaq	0:6c56fb4bc5f0	1892	for( i = 1; i <= 256; i++ )
nexpaq	0:6c56fb4bc5f0	1893	{
nexpaq	0:6c56fb4bc5f0	1894	real_count &= ( i <= padlen );
nexpaq	0:6c56fb4bc5f0	1895	pad_count += real_count *
nexpaq	0:6c56fb4bc5f0	1896	( ssl->in_msg[padding_idx + i] == padlen - 1 );
nexpaq	0:6c56fb4bc5f0	1897	}
nexpaq	0:6c56fb4bc5f0	1898
nexpaq	0:6c56fb4bc5f0	1899	correct &= ( pad_count == padlen ); /* Only 1 on correct padding */
nexpaq	0:6c56fb4bc5f0	1900
nexpaq	0:6c56fb4bc5f0	1901	#if defined(MBEDTLS_SSL_DEBUG_ALL)
nexpaq	0:6c56fb4bc5f0	1902	if( padlen > 0 && correct == 0 )
nexpaq	0:6c56fb4bc5f0	1903	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad padding byte detected" ) );
nexpaq	0:6c56fb4bc5f0	1904	#endif
nexpaq	0:6c56fb4bc5f0	1905	padlen &= correct * 0x1FF;
nexpaq	0:6c56fb4bc5f0	1906	}
nexpaq	0:6c56fb4bc5f0	1907	else
nexpaq	0:6c56fb4bc5f0	1908	#endif /* MBEDTLS_SSL_PROTO_TLS1 \|\| MBEDTLS_SSL_PROTO_TLS1_1 \|\| \
nexpaq	0:6c56fb4bc5f0	1909	MBEDTLS_SSL_PROTO_TLS1_2 */
nexpaq	0:6c56fb4bc5f0	1910	{
nexpaq	0:6c56fb4bc5f0	1911	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
nexpaq	0:6c56fb4bc5f0	1912	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
nexpaq	0:6c56fb4bc5f0	1913	}
nexpaq	0:6c56fb4bc5f0	1914
nexpaq	0:6c56fb4bc5f0	1915	ssl->in_msglen -= padlen;
nexpaq	0:6c56fb4bc5f0	1916	}
nexpaq	0:6c56fb4bc5f0	1917	else
nexpaq	0:6c56fb4bc5f0	1918	#endif /* MBEDTLS_CIPHER_MODE_CBC &&
nexpaq	0:6c56fb4bc5f0	1919	( MBEDTLS_AES_C \|\| MBEDTLS_CAMELLIA_C ) */
nexpaq	0:6c56fb4bc5f0	1920	{
nexpaq	0:6c56fb4bc5f0	1921	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
nexpaq	0:6c56fb4bc5f0	1922	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
nexpaq	0:6c56fb4bc5f0	1923	}
nexpaq	0:6c56fb4bc5f0	1924
nexpaq	0:6c56fb4bc5f0	1925	MBEDTLS_SSL_DEBUG_BUF( 4, "raw buffer after decryption",
nexpaq	0:6c56fb4bc5f0	1926	ssl->in_msg, ssl->in_msglen );
nexpaq	0:6c56fb4bc5f0	1927
nexpaq	0:6c56fb4bc5f0	1928	/*
nexpaq	0:6c56fb4bc5f0	1929	* Authenticate if not done yet.
nexpaq	0:6c56fb4bc5f0	1930	* Compute the MAC regardless of the padding result (RFC4346, CBCTIME).
nexpaq	0:6c56fb4bc5f0	1931	*/
nexpaq	0:6c56fb4bc5f0	1932	#if defined(SSL_SOME_MODES_USE_MAC)
nexpaq	0:6c56fb4bc5f0	1933	if( auth_done == 0 )
nexpaq	0:6c56fb4bc5f0	1934	{
nexpaq	0:6c56fb4bc5f0	1935	unsigned char tmp[SSL_MAX_MAC_SIZE];
nexpaq	0:6c56fb4bc5f0	1936
nexpaq	0:6c56fb4bc5f0	1937	ssl->in_msglen -= ssl->transform_in->maclen;
nexpaq	0:6c56fb4bc5f0	1938
nexpaq	0:6c56fb4bc5f0	1939	ssl->in_len[0] = (unsigned char)( ssl->in_msglen >> 8 );
nexpaq	0:6c56fb4bc5f0	1940	ssl->in_len[1] = (unsigned char)( ssl->in_msglen );
nexpaq	0:6c56fb4bc5f0	1941
nexpaq	0:6c56fb4bc5f0	1942	memcpy( tmp, ssl->in_msg + ssl->in_msglen, ssl->transform_in->maclen );
nexpaq	0:6c56fb4bc5f0	1943
nexpaq	0:6c56fb4bc5f0	1944	#if defined(MBEDTLS_SSL_PROTO_SSL3)
nexpaq	0:6c56fb4bc5f0	1945	if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 )
nexpaq	0:6c56fb4bc5f0	1946	{
nexpaq	0:6c56fb4bc5f0	1947	ssl_mac( &ssl->transform_in->md_ctx_dec,
nexpaq	0:6c56fb4bc5f0	1948	ssl->transform_in->mac_dec,
nexpaq	0:6c56fb4bc5f0	1949	ssl->in_msg, ssl->in_msglen,
nexpaq	0:6c56fb4bc5f0	1950	ssl->in_ctr, ssl->in_msgtype );
nexpaq	0:6c56fb4bc5f0	1951	}
nexpaq	0:6c56fb4bc5f0	1952	else
nexpaq	0:6c56fb4bc5f0	1953	#endif /* MBEDTLS_SSL_PROTO_SSL3 */
nexpaq	0:6c56fb4bc5f0	1954	#if defined(MBEDTLS_SSL_PROTO_TLS1) \|\| defined(MBEDTLS_SSL_PROTO_TLS1_1) \|\| \
nexpaq	0:6c56fb4bc5f0	1955	defined(MBEDTLS_SSL_PROTO_TLS1_2)
nexpaq	0:6c56fb4bc5f0	1956	if( ssl->minor_ver > MBEDTLS_SSL_MINOR_VERSION_0 )
nexpaq	0:6c56fb4bc5f0	1957	{
nexpaq	0:6c56fb4bc5f0	1958	/*
nexpaq	0:6c56fb4bc5f0	1959	* Process MAC and always update for padlen afterwards to make
nexpaq	0:6c56fb4bc5f0	1960	* total time independent of padlen
nexpaq	0:6c56fb4bc5f0	1961	*
nexpaq	0:6c56fb4bc5f0	1962	* extra_run compensates MAC check for padlen
nexpaq	0:6c56fb4bc5f0	1963	*
nexpaq	0:6c56fb4bc5f0	1964	* Known timing attacks:
nexpaq	0:6c56fb4bc5f0	1965	* - Lucky Thirteen (http://www.isg.rhul.ac.uk/tls/TLStiming.pdf)
nexpaq	0:6c56fb4bc5f0	1966	*
nexpaq	0:6c56fb4bc5f0	1967	* We use ( ( Lx + 8 ) / 64 ) to handle 'negative Lx' values
nexpaq	0:6c56fb4bc5f0	1968	* correctly. (We round down instead of up, so -56 is the correct
nexpaq	0:6c56fb4bc5f0	1969	* value for our calculations instead of -55)
nexpaq	0:6c56fb4bc5f0	1970	*/
nexpaq	0:6c56fb4bc5f0	1971	size_t j, extra_run = 0;
nexpaq	0:6c56fb4bc5f0	1972	extra_run = ( 13 + ssl->in_msglen + padlen + 8 ) / 64 -
nexpaq	0:6c56fb4bc5f0	1973	( 13 + ssl->in_msglen + 8 ) / 64;
nexpaq	0:6c56fb4bc5f0	1974
nexpaq	0:6c56fb4bc5f0	1975	extra_run &= correct * 0xFF;
nexpaq	0:6c56fb4bc5f0	1976
nexpaq	0:6c56fb4bc5f0	1977	mbedtls_md_hmac_update( &ssl->transform_in->md_ctx_dec, ssl->in_ctr, 8 );
nexpaq	0:6c56fb4bc5f0	1978	mbedtls_md_hmac_update( &ssl->transform_in->md_ctx_dec, ssl->in_hdr, 3 );
nexpaq	0:6c56fb4bc5f0	1979	mbedtls_md_hmac_update( &ssl->transform_in->md_ctx_dec, ssl->in_len, 2 );
nexpaq	0:6c56fb4bc5f0	1980	mbedtls_md_hmac_update( &ssl->transform_in->md_ctx_dec, ssl->in_msg,
nexpaq	0:6c56fb4bc5f0	1981	ssl->in_msglen );
nexpaq	0:6c56fb4bc5f0	1982	mbedtls_md_hmac_finish( &ssl->transform_in->md_ctx_dec,
nexpaq	0:6c56fb4bc5f0	1983	ssl->in_msg + ssl->in_msglen );
nexpaq	0:6c56fb4bc5f0	1984	/* Call mbedtls_md_process at least once due to cache attacks */
nexpaq	0:6c56fb4bc5f0	1985	for( j = 0; j < extra_run + 1; j++ )
nexpaq	0:6c56fb4bc5f0	1986	mbedtls_md_process( &ssl->transform_in->md_ctx_dec, ssl->in_msg );
nexpaq	0:6c56fb4bc5f0	1987
nexpaq	0:6c56fb4bc5f0	1988	mbedtls_md_hmac_reset( &ssl->transform_in->md_ctx_dec );
nexpaq	0:6c56fb4bc5f0	1989	}
nexpaq	0:6c56fb4bc5f0	1990	else
nexpaq	0:6c56fb4bc5f0	1991	#endif /* MBEDTLS_SSL_PROTO_TLS1 \|\| MBEDTLS_SSL_PROTO_TLS1_1 \|\| \
nexpaq	0:6c56fb4bc5f0	1992	MBEDTLS_SSL_PROTO_TLS1_2 */
nexpaq	0:6c56fb4bc5f0	1993	{
nexpaq	0:6c56fb4bc5f0	1994	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
nexpaq	0:6c56fb4bc5f0	1995	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
nexpaq	0:6c56fb4bc5f0	1996	}
nexpaq	0:6c56fb4bc5f0	1997
nexpaq	0:6c56fb4bc5f0	1998	MBEDTLS_SSL_DEBUG_BUF( 4, "message mac", tmp, ssl->transform_in->maclen );
nexpaq	0:6c56fb4bc5f0	1999	MBEDTLS_SSL_DEBUG_BUF( 4, "computed mac", ssl->in_msg + ssl->in_msglen,
nexpaq	0:6c56fb4bc5f0	2000	ssl->transform_in->maclen );
nexpaq	0:6c56fb4bc5f0	2001
nexpaq	0:6c56fb4bc5f0	2002	if( mbedtls_ssl_safer_memcmp( tmp, ssl->in_msg + ssl->in_msglen,
nexpaq	0:6c56fb4bc5f0	2003	ssl->transform_in->maclen ) != 0 )
nexpaq	0:6c56fb4bc5f0	2004	{
nexpaq	0:6c56fb4bc5f0	2005	#if defined(MBEDTLS_SSL_DEBUG_ALL)
nexpaq	0:6c56fb4bc5f0	2006	MBEDTLS_SSL_DEBUG_MSG( 1, ( "message mac does not match" ) );
nexpaq	0:6c56fb4bc5f0	2007	#endif
nexpaq	0:6c56fb4bc5f0	2008	correct = 0;
nexpaq	0:6c56fb4bc5f0	2009	}
nexpaq	0:6c56fb4bc5f0	2010	auth_done++;
nexpaq	0:6c56fb4bc5f0	2011
nexpaq	0:6c56fb4bc5f0	2012	/*
nexpaq	0:6c56fb4bc5f0	2013	* Finally check the correct flag
nexpaq	0:6c56fb4bc5f0	2014	*/
nexpaq	0:6c56fb4bc5f0	2015	if( correct == 0 )
nexpaq	0:6c56fb4bc5f0	2016	return( MBEDTLS_ERR_SSL_INVALID_MAC );
nexpaq	0:6c56fb4bc5f0	2017	}
nexpaq	0:6c56fb4bc5f0	2018	#endif /* SSL_SOME_MODES_USE_MAC */
nexpaq	0:6c56fb4bc5f0	2019
nexpaq	0:6c56fb4bc5f0	2020	/* Make extra sure authentication was performed, exactly once */
nexpaq	0:6c56fb4bc5f0	2021	if( auth_done != 1 )
nexpaq	0:6c56fb4bc5f0	2022	{
nexpaq	0:6c56fb4bc5f0	2023	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
nexpaq	0:6c56fb4bc5f0	2024	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
nexpaq	0:6c56fb4bc5f0	2025	}
nexpaq	0:6c56fb4bc5f0	2026
nexpaq	0:6c56fb4bc5f0	2027	if( ssl->in_msglen == 0 )
nexpaq	0:6c56fb4bc5f0	2028	{
nexpaq	0:6c56fb4bc5f0	2029	ssl->nb_zero++;
nexpaq	0:6c56fb4bc5f0	2030
nexpaq	0:6c56fb4bc5f0	2031	/*
nexpaq	0:6c56fb4bc5f0	2032	* Three or more empty messages may be a DoS attack
nexpaq	0:6c56fb4bc5f0	2033	* (excessive CPU consumption).
nexpaq	0:6c56fb4bc5f0	2034	*/
nexpaq	0:6c56fb4bc5f0	2035	if( ssl->nb_zero > 3 )
nexpaq	0:6c56fb4bc5f0	2036	{
nexpaq	0:6c56fb4bc5f0	2037	MBEDTLS_SSL_DEBUG_MSG( 1, ( "received four consecutive empty "
nexpaq	0:6c56fb4bc5f0	2038	"messages, possible DoS attack" ) );
nexpaq	0:6c56fb4bc5f0	2039	return( MBEDTLS_ERR_SSL_INVALID_MAC );
nexpaq	0:6c56fb4bc5f0	2040	}
nexpaq	0:6c56fb4bc5f0	2041	}
nexpaq	0:6c56fb4bc5f0	2042	else
nexpaq	0:6c56fb4bc5f0	2043	ssl->nb_zero = 0;
nexpaq	0:6c56fb4bc5f0	2044
nexpaq	0:6c56fb4bc5f0	2045	#if defined(MBEDTLS_SSL_PROTO_DTLS)
nexpaq	0:6c56fb4bc5f0	2046	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
nexpaq	0:6c56fb4bc5f0	2047	{
nexpaq	0:6c56fb4bc5f0	2048	; /* in_ctr read from peer, not maintained internally */
nexpaq	0:6c56fb4bc5f0	2049	}
nexpaq	0:6c56fb4bc5f0	2050	else
nexpaq	0:6c56fb4bc5f0	2051	#endif
nexpaq	0:6c56fb4bc5f0	2052	{
nexpaq	0:6c56fb4bc5f0	2053	for( i = 8; i > ssl_ep_len( ssl ); i-- )
nexpaq	0:6c56fb4bc5f0	2054	if( ++ssl->in_ctr[i - 1] != 0 )
nexpaq	0:6c56fb4bc5f0	2055	break;
nexpaq	0:6c56fb4bc5f0	2056
nexpaq	0:6c56fb4bc5f0	2057	/* The loop goes to its end iff the counter is wrapping */
nexpaq	0:6c56fb4bc5f0	2058	if( i == ssl_ep_len( ssl ) )
nexpaq	0:6c56fb4bc5f0	2059	{
nexpaq	0:6c56fb4bc5f0	2060	MBEDTLS_SSL_DEBUG_MSG( 1, ( "incoming message counter would wrap" ) );
nexpaq	0:6c56fb4bc5f0	2061	return( MBEDTLS_ERR_SSL_COUNTER_WRAPPING );
nexpaq	0:6c56fb4bc5f0	2062	}
nexpaq	0:6c56fb4bc5f0	2063	}
nexpaq	0:6c56fb4bc5f0	2064
nexpaq	0:6c56fb4bc5f0	2065	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= decrypt buf" ) );
nexpaq	0:6c56fb4bc5f0	2066
nexpaq	0:6c56fb4bc5f0	2067	return( 0 );
nexpaq	0:6c56fb4bc5f0	2068	}
nexpaq	0:6c56fb4bc5f0	2069
nexpaq	0:6c56fb4bc5f0	2070	#undef MAC_NONE
nexpaq	0:6c56fb4bc5f0	2071	#undef MAC_PLAINTEXT
nexpaq	0:6c56fb4bc5f0	2072	#undef MAC_CIPHERTEXT
nexpaq	0:6c56fb4bc5f0	2073
nexpaq	0:6c56fb4bc5f0	2074	#if defined(MBEDTLS_ZLIB_SUPPORT)
nexpaq	0:6c56fb4bc5f0	2075	/*
nexpaq	0:6c56fb4bc5f0	2076	* Compression/decompression functions
nexpaq	0:6c56fb4bc5f0	2077	*/
nexpaq	0:6c56fb4bc5f0	2078	static int ssl_compress_buf( mbedtls_ssl_context *ssl )
nexpaq	0:6c56fb4bc5f0	2079	{
nexpaq	0:6c56fb4bc5f0	2080	int ret;
nexpaq	0:6c56fb4bc5f0	2081	unsigned char *msg_post = ssl->out_msg;
nexpaq	0:6c56fb4bc5f0	2082	size_t len_pre = ssl->out_msglen;
nexpaq	0:6c56fb4bc5f0	2083	unsigned char *msg_pre = ssl->compress_buf;
nexpaq	0:6c56fb4bc5f0	2084
nexpaq	0:6c56fb4bc5f0	2085	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> compress buf" ) );
nexpaq	0:6c56fb4bc5f0	2086
nexpaq	0:6c56fb4bc5f0	2087	if( len_pre == 0 )
nexpaq	0:6c56fb4bc5f0	2088	return( 0 );
nexpaq	0:6c56fb4bc5f0	2089
nexpaq	0:6c56fb4bc5f0	2090	memcpy( msg_pre, ssl->out_msg, len_pre );
nexpaq	0:6c56fb4bc5f0	2091
nexpaq	0:6c56fb4bc5f0	2092	MBEDTLS_SSL_DEBUG_MSG( 3, ( "before compression: msglen = %d, ",
nexpaq	0:6c56fb4bc5f0	2093	ssl->out_msglen ) );
nexpaq	0:6c56fb4bc5f0	2094
nexpaq	0:6c56fb4bc5f0	2095	MBEDTLS_SSL_DEBUG_BUF( 4, "before compression: output payload",
nexpaq	0:6c56fb4bc5f0	2096	ssl->out_msg, ssl->out_msglen );
nexpaq	0:6c56fb4bc5f0	2097
nexpaq	0:6c56fb4bc5f0	2098	ssl->transform_out->ctx_deflate.next_in = msg_pre;
nexpaq	0:6c56fb4bc5f0	2099	ssl->transform_out->ctx_deflate.avail_in = len_pre;
nexpaq	0:6c56fb4bc5f0	2100	ssl->transform_out->ctx_deflate.next_out = msg_post;
nexpaq	0:6c56fb4bc5f0	2101	ssl->transform_out->ctx_deflate.avail_out = MBEDTLS_SSL_BUFFER_LEN;
nexpaq	0:6c56fb4bc5f0	2102
nexpaq	0:6c56fb4bc5f0	2103	ret = deflate( &ssl->transform_out->ctx_deflate, Z_SYNC_FLUSH );
nexpaq	0:6c56fb4bc5f0	2104	if( ret != Z_OK )
nexpaq	0:6c56fb4bc5f0	2105	{
nexpaq	0:6c56fb4bc5f0	2106	MBEDTLS_SSL_DEBUG_MSG( 1, ( "failed to perform compression (%d)", ret ) );
nexpaq	0:6c56fb4bc5f0	2107	return( MBEDTLS_ERR_SSL_COMPRESSION_FAILED );
nexpaq	0:6c56fb4bc5f0	2108	}
nexpaq	0:6c56fb4bc5f0	2109
nexpaq	0:6c56fb4bc5f0	2110	ssl->out_msglen = MBEDTLS_SSL_BUFFER_LEN -
nexpaq	0:6c56fb4bc5f0	2111	ssl->transform_out->ctx_deflate.avail_out;
nexpaq	0:6c56fb4bc5f0	2112
nexpaq	0:6c56fb4bc5f0	2113	MBEDTLS_SSL_DEBUG_MSG( 3, ( "after compression: msglen = %d, ",
nexpaq	0:6c56fb4bc5f0	2114	ssl->out_msglen ) );
nexpaq	0:6c56fb4bc5f0	2115
nexpaq	0:6c56fb4bc5f0	2116	MBEDTLS_SSL_DEBUG_BUF( 4, "after compression: output payload",
nexpaq	0:6c56fb4bc5f0	2117	ssl->out_msg, ssl->out_msglen );
nexpaq	0:6c56fb4bc5f0	2118
nexpaq	0:6c56fb4bc5f0	2119	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= compress buf" ) );
nexpaq	0:6c56fb4bc5f0	2120
nexpaq	0:6c56fb4bc5f0	2121	return( 0 );
nexpaq	0:6c56fb4bc5f0	2122	}
nexpaq	0:6c56fb4bc5f0	2123
nexpaq	0:6c56fb4bc5f0	2124	static int ssl_decompress_buf( mbedtls_ssl_context *ssl )
nexpaq	0:6c56fb4bc5f0	2125	{
nexpaq	0:6c56fb4bc5f0	2126	int ret;
nexpaq	0:6c56fb4bc5f0	2127	unsigned char *msg_post = ssl->in_msg;
nexpaq	0:6c56fb4bc5f0	2128	size_t len_pre = ssl->in_msglen;
nexpaq	0:6c56fb4bc5f0	2129	unsigned char *msg_pre = ssl->compress_buf;
nexpaq	0:6c56fb4bc5f0	2130
nexpaq	0:6c56fb4bc5f0	2131	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> decompress buf" ) );
nexpaq	0:6c56fb4bc5f0	2132
nexpaq	0:6c56fb4bc5f0	2133	if( len_pre == 0 )
nexpaq	0:6c56fb4bc5f0	2134	return( 0 );
nexpaq	0:6c56fb4bc5f0	2135
nexpaq	0:6c56fb4bc5f0	2136	memcpy( msg_pre, ssl->in_msg, len_pre );
nexpaq	0:6c56fb4bc5f0	2137
nexpaq	0:6c56fb4bc5f0	2138	MBEDTLS_SSL_DEBUG_MSG( 3, ( "before decompression: msglen = %d, ",
nexpaq	0:6c56fb4bc5f0	2139	ssl->in_msglen ) );
nexpaq	0:6c56fb4bc5f0	2140
nexpaq	0:6c56fb4bc5f0	2141	MBEDTLS_SSL_DEBUG_BUF( 4, "before decompression: input payload",
nexpaq	0:6c56fb4bc5f0	2142	ssl->in_msg, ssl->in_msglen );
nexpaq	0:6c56fb4bc5f0	2143
nexpaq	0:6c56fb4bc5f0	2144	ssl->transform_in->ctx_inflate.next_in = msg_pre;
nexpaq	0:6c56fb4bc5f0	2145	ssl->transform_in->ctx_inflate.avail_in = len_pre;
nexpaq	0:6c56fb4bc5f0	2146	ssl->transform_in->ctx_inflate.next_out = msg_post;
nexpaq	0:6c56fb4bc5f0	2147	ssl->transform_in->ctx_inflate.avail_out = MBEDTLS_SSL_MAX_CONTENT_LEN;
nexpaq	0:6c56fb4bc5f0	2148
nexpaq	0:6c56fb4bc5f0	2149	ret = inflate( &ssl->transform_in->ctx_inflate, Z_SYNC_FLUSH );
nexpaq	0:6c56fb4bc5f0	2150	if( ret != Z_OK )
nexpaq	0:6c56fb4bc5f0	2151	{
nexpaq	0:6c56fb4bc5f0	2152	MBEDTLS_SSL_DEBUG_MSG( 1, ( "failed to perform decompression (%d)", ret ) );
nexpaq	0:6c56fb4bc5f0	2153	return( MBEDTLS_ERR_SSL_COMPRESSION_FAILED );
nexpaq	0:6c56fb4bc5f0	2154	}
nexpaq	0:6c56fb4bc5f0	2155
nexpaq	0:6c56fb4bc5f0	2156	ssl->in_msglen = MBEDTLS_SSL_MAX_CONTENT_LEN -
nexpaq	0:6c56fb4bc5f0	2157	ssl->transform_in->ctx_inflate.avail_out;
nexpaq	0:6c56fb4bc5f0	2158
nexpaq	0:6c56fb4bc5f0	2159	MBEDTLS_SSL_DEBUG_MSG( 3, ( "after decompression: msglen = %d, ",
nexpaq	0:6c56fb4bc5f0	2160	ssl->in_msglen ) );
nexpaq	0:6c56fb4bc5f0	2161
nexpaq	0:6c56fb4bc5f0	2162	MBEDTLS_SSL_DEBUG_BUF( 4, "after decompression: input payload",
nexpaq	0:6c56fb4bc5f0	2163	ssl->in_msg, ssl->in_msglen );
nexpaq	0:6c56fb4bc5f0	2164
nexpaq	0:6c56fb4bc5f0	2165	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= decompress buf" ) );
nexpaq	0:6c56fb4bc5f0	2166
nexpaq	0:6c56fb4bc5f0	2167	return( 0 );
nexpaq	0:6c56fb4bc5f0	2168	}
nexpaq	0:6c56fb4bc5f0	2169	#endif /* MBEDTLS_ZLIB_SUPPORT */
nexpaq	0:6c56fb4bc5f0	2170
nexpaq	0:6c56fb4bc5f0	2171	#if defined(MBEDTLS_SSL_SRV_C) && defined(MBEDTLS_SSL_RENEGOTIATION)
nexpaq	0:6c56fb4bc5f0	2172	static int ssl_write_hello_request( mbedtls_ssl_context *ssl );
nexpaq	0:6c56fb4bc5f0	2173
nexpaq	0:6c56fb4bc5f0	2174	#if defined(MBEDTLS_SSL_PROTO_DTLS)
nexpaq	0:6c56fb4bc5f0	2175	static int ssl_resend_hello_request( mbedtls_ssl_context *ssl )
nexpaq	0:6c56fb4bc5f0	2176	{
nexpaq	0:6c56fb4bc5f0	2177	/* If renegotiation is not enforced, retransmit until we would reach max
nexpaq	0:6c56fb4bc5f0	2178	* timeout if we were using the usual handshake doubling scheme */
nexpaq	0:6c56fb4bc5f0	2179	if( ssl->conf->renego_max_records < 0 )
nexpaq	0:6c56fb4bc5f0	2180	{
nexpaq	0:6c56fb4bc5f0	2181	uint32_t ratio = ssl->conf->hs_timeout_max / ssl->conf->hs_timeout_min + 1;
nexpaq	0:6c56fb4bc5f0	2182	unsigned char doublings = 1;
nexpaq	0:6c56fb4bc5f0	2183
nexpaq	0:6c56fb4bc5f0	2184	while( ratio != 0 )
nexpaq	0:6c56fb4bc5f0	2185	{
nexpaq	0:6c56fb4bc5f0	2186	++doublings;
nexpaq	0:6c56fb4bc5f0	2187	ratio >>= 1;
nexpaq	0:6c56fb4bc5f0	2188	}
nexpaq	0:6c56fb4bc5f0	2189
nexpaq	0:6c56fb4bc5f0	2190	if( ++ssl->renego_records_seen > doublings )
nexpaq	0:6c56fb4bc5f0	2191	{
nexpaq	0:6c56fb4bc5f0	2192	MBEDTLS_SSL_DEBUG_MSG( 2, ( "no longer retransmitting hello request" ) );
nexpaq	0:6c56fb4bc5f0	2193	return( 0 );
nexpaq	0:6c56fb4bc5f0	2194	}
nexpaq	0:6c56fb4bc5f0	2195	}
nexpaq	0:6c56fb4bc5f0	2196
nexpaq	0:6c56fb4bc5f0	2197	return( ssl_write_hello_request( ssl ) );
nexpaq	0:6c56fb4bc5f0	2198	}
nexpaq	0:6c56fb4bc5f0	2199	#endif
nexpaq	0:6c56fb4bc5f0	2200	#endif /* MBEDTLS_SSL_SRV_C && MBEDTLS_SSL_RENEGOTIATION */
nexpaq	0:6c56fb4bc5f0	2201
nexpaq	0:6c56fb4bc5f0	2202	/*
nexpaq	0:6c56fb4bc5f0	2203	* Fill the input message buffer by appending data to it.
nexpaq	0:6c56fb4bc5f0	2204	* The amount of data already fetched is in ssl->in_left.
nexpaq	0:6c56fb4bc5f0	2205	*
nexpaq	0:6c56fb4bc5f0	2206	* If we return 0, is it guaranteed that (at least) nb_want bytes are
nexpaq	0:6c56fb4bc5f0	2207	* available (from this read and/or a previous one). Otherwise, an error code
nexpaq	0:6c56fb4bc5f0	2208	* is returned (possibly EOF or WANT_READ).
nexpaq	0:6c56fb4bc5f0	2209	*
nexpaq	0:6c56fb4bc5f0	2210	* With stream transport (TLS) on success ssl->in_left == nb_want, but
nexpaq	0:6c56fb4bc5f0	2211	* with datagram transport (DTLS) on success ssl->in_left >= nb_want,
nexpaq	0:6c56fb4bc5f0	2212	* since we always read a whole datagram at once.
nexpaq	0:6c56fb4bc5f0	2213	*
nexpaq	0:6c56fb4bc5f0	2214	* For DTLS, it is up to the caller to set ssl->next_record_offset when
nexpaq	0:6c56fb4bc5f0	2215	* they're done reading a record.
nexpaq	0:6c56fb4bc5f0	2216	*/
nexpaq	0:6c56fb4bc5f0	2217	int mbedtls_ssl_fetch_input( mbedtls_ssl_context *ssl, size_t nb_want )
nexpaq	0:6c56fb4bc5f0	2218	{
nexpaq	0:6c56fb4bc5f0	2219	int ret;
nexpaq	0:6c56fb4bc5f0	2220	size_t len;
nexpaq	0:6c56fb4bc5f0	2221
nexpaq	0:6c56fb4bc5f0	2222	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> fetch input" ) );
nexpaq	0:6c56fb4bc5f0	2223
nexpaq	0:6c56fb4bc5f0	2224	if( ssl->f_recv == NULL && ssl->f_recv_timeout == NULL )
nexpaq	0:6c56fb4bc5f0	2225	{
nexpaq	0:6c56fb4bc5f0	2226	MBEDTLS_SSL_DEBUG_MSG( 1, ( "Bad usage of mbedtls_ssl_set_bio() "
nexpaq	0:6c56fb4bc5f0	2227	"or mbedtls_ssl_set_bio()" ) );
nexpaq	0:6c56fb4bc5f0	2228	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
nexpaq	0:6c56fb4bc5f0	2229	}
nexpaq	0:6c56fb4bc5f0	2230
nexpaq	0:6c56fb4bc5f0	2231	if( nb_want > MBEDTLS_SSL_BUFFER_LEN - (size_t)( ssl->in_hdr - ssl->in_buf ) )
nexpaq	0:6c56fb4bc5f0	2232	{
nexpaq	0:6c56fb4bc5f0	2233	MBEDTLS_SSL_DEBUG_MSG( 1, ( "requesting more data than fits" ) );
nexpaq	0:6c56fb4bc5f0	2234	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
nexpaq	0:6c56fb4bc5f0	2235	}
nexpaq	0:6c56fb4bc5f0	2236
nexpaq	0:6c56fb4bc5f0	2237	#if defined(MBEDTLS_SSL_PROTO_DTLS)
nexpaq	0:6c56fb4bc5f0	2238	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
nexpaq	0:6c56fb4bc5f0	2239	{
nexpaq	0:6c56fb4bc5f0	2240	uint32_t timeout;
nexpaq	0:6c56fb4bc5f0	2241
nexpaq	0:6c56fb4bc5f0	2242	/* Just to be sure */
nexpaq	0:6c56fb4bc5f0	2243	if( ssl->f_set_timer == NULL \|\| ssl->f_get_timer == NULL )
nexpaq	0:6c56fb4bc5f0	2244	{
nexpaq	0:6c56fb4bc5f0	2245	MBEDTLS_SSL_DEBUG_MSG( 1, ( "You must use "
nexpaq	0:6c56fb4bc5f0	2246	"mbedtls_ssl_set_timer_cb() for DTLS" ) );
nexpaq	0:6c56fb4bc5f0	2247	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
nexpaq	0:6c56fb4bc5f0	2248	}
nexpaq	0:6c56fb4bc5f0	2249
nexpaq	0:6c56fb4bc5f0	2250	/*
nexpaq	0:6c56fb4bc5f0	2251	* The point is, we need to always read a full datagram at once, so we
nexpaq	0:6c56fb4bc5f0	2252	* sometimes read more then requested, and handle the additional data.
nexpaq	0:6c56fb4bc5f0	2253	* It could be the rest of the current record (while fetching the
nexpaq	0:6c56fb4bc5f0	2254	* header) and/or some other records in the same datagram.
nexpaq	0:6c56fb4bc5f0	2255	*/
nexpaq	0:6c56fb4bc5f0	2256
nexpaq	0:6c56fb4bc5f0	2257	/*
nexpaq	0:6c56fb4bc5f0	2258	* Move to the next record in the already read datagram if applicable
nexpaq	0:6c56fb4bc5f0	2259	*/
nexpaq	0:6c56fb4bc5f0	2260	if( ssl->next_record_offset != 0 )
nexpaq	0:6c56fb4bc5f0	2261	{
nexpaq	0:6c56fb4bc5f0	2262	if( ssl->in_left < ssl->next_record_offset )
nexpaq	0:6c56fb4bc5f0	2263	{
nexpaq	0:6c56fb4bc5f0	2264	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
nexpaq	0:6c56fb4bc5f0	2265	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
nexpaq	0:6c56fb4bc5f0	2266	}
nexpaq	0:6c56fb4bc5f0	2267
nexpaq	0:6c56fb4bc5f0	2268	ssl->in_left -= ssl->next_record_offset;
nexpaq	0:6c56fb4bc5f0	2269
nexpaq	0:6c56fb4bc5f0	2270	if( ssl->in_left != 0 )
nexpaq	0:6c56fb4bc5f0	2271	{
nexpaq	0:6c56fb4bc5f0	2272	MBEDTLS_SSL_DEBUG_MSG( 2, ( "next record in same datagram, offset: %d",
nexpaq	0:6c56fb4bc5f0	2273	ssl->next_record_offset ) );
nexpaq	0:6c56fb4bc5f0	2274	memmove( ssl->in_hdr,
nexpaq	0:6c56fb4bc5f0	2275	ssl->in_hdr + ssl->next_record_offset,
nexpaq	0:6c56fb4bc5f0	2276	ssl->in_left );
nexpaq	0:6c56fb4bc5f0	2277	}
nexpaq	0:6c56fb4bc5f0	2278
nexpaq	0:6c56fb4bc5f0	2279	ssl->next_record_offset = 0;
nexpaq	0:6c56fb4bc5f0	2280	}
nexpaq	0:6c56fb4bc5f0	2281
nexpaq	0:6c56fb4bc5f0	2282	MBEDTLS_SSL_DEBUG_MSG( 2, ( "in_left: %d, nb_want: %d",
nexpaq	0:6c56fb4bc5f0	2283	ssl->in_left, nb_want ) );
nexpaq	0:6c56fb4bc5f0	2284
nexpaq	0:6c56fb4bc5f0	2285	/*
nexpaq	0:6c56fb4bc5f0	2286	* Done if we already have enough data.
nexpaq	0:6c56fb4bc5f0	2287	*/
nexpaq	0:6c56fb4bc5f0	2288	if( nb_want <= ssl->in_left)
nexpaq	0:6c56fb4bc5f0	2289	{
nexpaq	0:6c56fb4bc5f0	2290	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= fetch input" ) );
nexpaq	0:6c56fb4bc5f0	2291	return( 0 );
nexpaq	0:6c56fb4bc5f0	2292	}
nexpaq	0:6c56fb4bc5f0	2293
nexpaq	0:6c56fb4bc5f0	2294	/*
nexpaq	0:6c56fb4bc5f0	2295	* A record can't be split accross datagrams. If we need to read but
nexpaq	0:6c56fb4bc5f0	2296	* are not at the beginning of a new record, the caller did something
nexpaq	0:6c56fb4bc5f0	2297	* wrong.
nexpaq	0:6c56fb4bc5f0	2298	*/
nexpaq	0:6c56fb4bc5f0	2299	if( ssl->in_left != 0 )
nexpaq	0:6c56fb4bc5f0	2300	{
nexpaq	0:6c56fb4bc5f0	2301	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
nexpaq	0:6c56fb4bc5f0	2302	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
nexpaq	0:6c56fb4bc5f0	2303	}
nexpaq	0:6c56fb4bc5f0	2304
nexpaq	0:6c56fb4bc5f0	2305	/*
nexpaq	0:6c56fb4bc5f0	2306	* Don't even try to read if time's out already.
nexpaq	0:6c56fb4bc5f0	2307	* This avoids by-passing the timer when repeatedly receiving messages
nexpaq	0:6c56fb4bc5f0	2308	* that will end up being dropped.
nexpaq	0:6c56fb4bc5f0	2309	*/
nexpaq	0:6c56fb4bc5f0	2310	if( ssl_check_timer( ssl ) != 0 )
nexpaq	0:6c56fb4bc5f0	2311	ret = MBEDTLS_ERR_SSL_TIMEOUT;
nexpaq	0:6c56fb4bc5f0	2312	else
nexpaq	0:6c56fb4bc5f0	2313	{
nexpaq	0:6c56fb4bc5f0	2314	len = MBEDTLS_SSL_BUFFER_LEN - ( ssl->in_hdr - ssl->in_buf );
nexpaq	0:6c56fb4bc5f0	2315
nexpaq	0:6c56fb4bc5f0	2316	if( ssl->state != MBEDTLS_SSL_HANDSHAKE_OVER )
nexpaq	0:6c56fb4bc5f0	2317	timeout = ssl->handshake->retransmit_timeout;
nexpaq	0:6c56fb4bc5f0	2318	else
nexpaq	0:6c56fb4bc5f0	2319	timeout = ssl->conf->read_timeout;
nexpaq	0:6c56fb4bc5f0	2320
nexpaq	0:6c56fb4bc5f0	2321	MBEDTLS_SSL_DEBUG_MSG( 3, ( "f_recv_timeout: %u ms", timeout ) );
nexpaq	0:6c56fb4bc5f0	2322
nexpaq	0:6c56fb4bc5f0	2323	if( ssl->f_recv_timeout != NULL )
nexpaq	0:6c56fb4bc5f0	2324	ret = ssl->f_recv_timeout( ssl->p_bio, ssl->in_hdr, len,
nexpaq	0:6c56fb4bc5f0	2325	timeout );
nexpaq	0:6c56fb4bc5f0	2326	else
nexpaq	0:6c56fb4bc5f0	2327	ret = ssl->f_recv( ssl->p_bio, ssl->in_hdr, len );
nexpaq	0:6c56fb4bc5f0	2328
nexpaq	0:6c56fb4bc5f0	2329	MBEDTLS_SSL_DEBUG_RET( 2, "ssl->f_recv(_timeout)", ret );
nexpaq	0:6c56fb4bc5f0	2330
nexpaq	0:6c56fb4bc5f0	2331	if( ret == 0 )
nexpaq	0:6c56fb4bc5f0	2332	return( MBEDTLS_ERR_SSL_CONN_EOF );
nexpaq	0:6c56fb4bc5f0	2333	}
nexpaq	0:6c56fb4bc5f0	2334
nexpaq	0:6c56fb4bc5f0	2335	if( ret == MBEDTLS_ERR_SSL_TIMEOUT )
nexpaq	0:6c56fb4bc5f0	2336	{
nexpaq	0:6c56fb4bc5f0	2337	MBEDTLS_SSL_DEBUG_MSG( 2, ( "timeout" ) );
nexpaq	0:6c56fb4bc5f0	2338	ssl_set_timer( ssl, 0 );
nexpaq	0:6c56fb4bc5f0	2339
nexpaq	0:6c56fb4bc5f0	2340	if( ssl->state != MBEDTLS_SSL_HANDSHAKE_OVER )
nexpaq	0:6c56fb4bc5f0	2341	{
nexpaq	0:6c56fb4bc5f0	2342	if( ssl_double_retransmit_timeout( ssl ) != 0 )
nexpaq	0:6c56fb4bc5f0	2343	{
nexpaq	0:6c56fb4bc5f0	2344	MBEDTLS_SSL_DEBUG_MSG( 1, ( "handshake timeout" ) );
nexpaq	0:6c56fb4bc5f0	2345	return( MBEDTLS_ERR_SSL_TIMEOUT );
nexpaq	0:6c56fb4bc5f0	2346	}
nexpaq	0:6c56fb4bc5f0	2347
nexpaq	0:6c56fb4bc5f0	2348	if( ( ret = mbedtls_ssl_resend( ssl ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	2349	{
nexpaq	0:6c56fb4bc5f0	2350	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_resend", ret );
nexpaq	0:6c56fb4bc5f0	2351	return( ret );
nexpaq	0:6c56fb4bc5f0	2352	}
nexpaq	0:6c56fb4bc5f0	2353
nexpaq	0:6c56fb4bc5f0	2354	return( MBEDTLS_ERR_SSL_WANT_READ );
nexpaq	0:6c56fb4bc5f0	2355	}
nexpaq	0:6c56fb4bc5f0	2356	#if defined(MBEDTLS_SSL_SRV_C) && defined(MBEDTLS_SSL_RENEGOTIATION)
nexpaq	0:6c56fb4bc5f0	2357	else if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER &&
nexpaq	0:6c56fb4bc5f0	2358	ssl->renego_status == MBEDTLS_SSL_RENEGOTIATION_PENDING )
nexpaq	0:6c56fb4bc5f0	2359	{
nexpaq	0:6c56fb4bc5f0	2360	if( ( ret = ssl_resend_hello_request( ssl ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	2361	{
nexpaq	0:6c56fb4bc5f0	2362	MBEDTLS_SSL_DEBUG_RET( 1, "ssl_resend_hello_request", ret );
nexpaq	0:6c56fb4bc5f0	2363	return( ret );
nexpaq	0:6c56fb4bc5f0	2364	}
nexpaq	0:6c56fb4bc5f0	2365
nexpaq	0:6c56fb4bc5f0	2366	return( MBEDTLS_ERR_SSL_WANT_READ );
nexpaq	0:6c56fb4bc5f0	2367	}
nexpaq	0:6c56fb4bc5f0	2368	#endif /* MBEDTLS_SSL_SRV_C && MBEDTLS_SSL_RENEGOTIATION */
nexpaq	0:6c56fb4bc5f0	2369	}
nexpaq	0:6c56fb4bc5f0	2370
nexpaq	0:6c56fb4bc5f0	2371	if( ret < 0 )
nexpaq	0:6c56fb4bc5f0	2372	return( ret );
nexpaq	0:6c56fb4bc5f0	2373
nexpaq	0:6c56fb4bc5f0	2374	ssl->in_left = ret;
nexpaq	0:6c56fb4bc5f0	2375	}
nexpaq	0:6c56fb4bc5f0	2376	else
nexpaq	0:6c56fb4bc5f0	2377	#endif
nexpaq	0:6c56fb4bc5f0	2378	{
nexpaq	0:6c56fb4bc5f0	2379	MBEDTLS_SSL_DEBUG_MSG( 2, ( "in_left: %d, nb_want: %d",
nexpaq	0:6c56fb4bc5f0	2380	ssl->in_left, nb_want ) );
nexpaq	0:6c56fb4bc5f0	2381
nexpaq	0:6c56fb4bc5f0	2382	while( ssl->in_left < nb_want )
nexpaq	0:6c56fb4bc5f0	2383	{
nexpaq	0:6c56fb4bc5f0	2384	len = nb_want - ssl->in_left;
nexpaq	0:6c56fb4bc5f0	2385
nexpaq	0:6c56fb4bc5f0	2386	if( ssl_check_timer( ssl ) != 0 )
nexpaq	0:6c56fb4bc5f0	2387	ret = MBEDTLS_ERR_SSL_TIMEOUT;
nexpaq	0:6c56fb4bc5f0	2388	else
nexpaq	0:6c56fb4bc5f0	2389	{
nexpaq	0:6c56fb4bc5f0	2390	if( ssl->f_recv_timeout != NULL )
nexpaq	0:6c56fb4bc5f0	2391	{
nexpaq	0:6c56fb4bc5f0	2392	ret = ssl->f_recv_timeout( ssl->p_bio,
nexpaq	0:6c56fb4bc5f0	2393	ssl->in_hdr + ssl->in_left, len,
nexpaq	0:6c56fb4bc5f0	2394	ssl->conf->read_timeout );
nexpaq	0:6c56fb4bc5f0	2395	}
nexpaq	0:6c56fb4bc5f0	2396	else
nexpaq	0:6c56fb4bc5f0	2397	{
nexpaq	0:6c56fb4bc5f0	2398	ret = ssl->f_recv( ssl->p_bio,
nexpaq	0:6c56fb4bc5f0	2399	ssl->in_hdr + ssl->in_left, len );
nexpaq	0:6c56fb4bc5f0	2400	}
nexpaq	0:6c56fb4bc5f0	2401	}
nexpaq	0:6c56fb4bc5f0	2402
nexpaq	0:6c56fb4bc5f0	2403	MBEDTLS_SSL_DEBUG_MSG( 2, ( "in_left: %d, nb_want: %d",
nexpaq	0:6c56fb4bc5f0	2404	ssl->in_left, nb_want ) );
nexpaq	0:6c56fb4bc5f0	2405	MBEDTLS_SSL_DEBUG_RET( 2, "ssl->f_recv(_timeout)", ret );
nexpaq	0:6c56fb4bc5f0	2406
nexpaq	0:6c56fb4bc5f0	2407	if( ret == 0 )
nexpaq	0:6c56fb4bc5f0	2408	return( MBEDTLS_ERR_SSL_CONN_EOF );
nexpaq	0:6c56fb4bc5f0	2409
nexpaq	0:6c56fb4bc5f0	2410	if( ret < 0 )
nexpaq	0:6c56fb4bc5f0	2411	return( ret );
nexpaq	0:6c56fb4bc5f0	2412
nexpaq	0:6c56fb4bc5f0	2413	ssl->in_left += ret;
nexpaq	0:6c56fb4bc5f0	2414	}
nexpaq	0:6c56fb4bc5f0	2415	}
nexpaq	0:6c56fb4bc5f0	2416
nexpaq	0:6c56fb4bc5f0	2417	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= fetch input" ) );
nexpaq	0:6c56fb4bc5f0	2418
nexpaq	0:6c56fb4bc5f0	2419	return( 0 );
nexpaq	0:6c56fb4bc5f0	2420	}
nexpaq	0:6c56fb4bc5f0	2421
nexpaq	0:6c56fb4bc5f0	2422	/*
nexpaq	0:6c56fb4bc5f0	2423	* Flush any data not yet written
nexpaq	0:6c56fb4bc5f0	2424	*/
nexpaq	0:6c56fb4bc5f0	2425	int mbedtls_ssl_flush_output( mbedtls_ssl_context *ssl )
nexpaq	0:6c56fb4bc5f0	2426	{
nexpaq	0:6c56fb4bc5f0	2427	int ret;
nexpaq	0:6c56fb4bc5f0	2428	unsigned char *buf, i;
nexpaq	0:6c56fb4bc5f0	2429
nexpaq	0:6c56fb4bc5f0	2430	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> flush output" ) );
nexpaq	0:6c56fb4bc5f0	2431
nexpaq	0:6c56fb4bc5f0	2432	if( ssl->f_send == NULL )
nexpaq	0:6c56fb4bc5f0	2433	{
nexpaq	0:6c56fb4bc5f0	2434	MBEDTLS_SSL_DEBUG_MSG( 1, ( "Bad usage of mbedtls_ssl_set_bio() "
nexpaq	0:6c56fb4bc5f0	2435	"or mbedtls_ssl_set_bio()" ) );
nexpaq	0:6c56fb4bc5f0	2436	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
nexpaq	0:6c56fb4bc5f0	2437	}
nexpaq	0:6c56fb4bc5f0	2438
nexpaq	0:6c56fb4bc5f0	2439	/* Avoid incrementing counter if data is flushed */
nexpaq	0:6c56fb4bc5f0	2440	if( ssl->out_left == 0 )
nexpaq	0:6c56fb4bc5f0	2441	{
nexpaq	0:6c56fb4bc5f0	2442	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= flush output" ) );
nexpaq	0:6c56fb4bc5f0	2443	return( 0 );
nexpaq	0:6c56fb4bc5f0	2444	}
nexpaq	0:6c56fb4bc5f0	2445
nexpaq	0:6c56fb4bc5f0	2446	while( ssl->out_left > 0 )
nexpaq	0:6c56fb4bc5f0	2447	{
nexpaq	0:6c56fb4bc5f0	2448	MBEDTLS_SSL_DEBUG_MSG( 2, ( "message length: %d, out_left: %d",
nexpaq	0:6c56fb4bc5f0	2449	mbedtls_ssl_hdr_len( ssl ) + ssl->out_msglen, ssl->out_left ) );
nexpaq	0:6c56fb4bc5f0	2450
nexpaq	0:6c56fb4bc5f0	2451	buf = ssl->out_hdr + mbedtls_ssl_hdr_len( ssl ) +
nexpaq	0:6c56fb4bc5f0	2452	ssl->out_msglen - ssl->out_left;
nexpaq	0:6c56fb4bc5f0	2453	ret = ssl->f_send( ssl->p_bio, buf, ssl->out_left );
nexpaq	0:6c56fb4bc5f0	2454
nexpaq	0:6c56fb4bc5f0	2455	MBEDTLS_SSL_DEBUG_RET( 2, "ssl->f_send", ret );
nexpaq	0:6c56fb4bc5f0	2456
nexpaq	0:6c56fb4bc5f0	2457	if( ret <= 0 )
nexpaq	0:6c56fb4bc5f0	2458	return( ret );
nexpaq	0:6c56fb4bc5f0	2459
nexpaq	0:6c56fb4bc5f0	2460	ssl->out_left -= ret;
nexpaq	0:6c56fb4bc5f0	2461	}
nexpaq	0:6c56fb4bc5f0	2462
nexpaq	0:6c56fb4bc5f0	2463	for( i = 8; i > ssl_ep_len( ssl ); i-- )
nexpaq	0:6c56fb4bc5f0	2464	if( ++ssl->out_ctr[i - 1] != 0 )
nexpaq	0:6c56fb4bc5f0	2465	break;
nexpaq	0:6c56fb4bc5f0	2466
nexpaq	0:6c56fb4bc5f0	2467	/* The loop goes to its end iff the counter is wrapping */
nexpaq	0:6c56fb4bc5f0	2468	if( i == ssl_ep_len( ssl ) )
nexpaq	0:6c56fb4bc5f0	2469	{
nexpaq	0:6c56fb4bc5f0	2470	MBEDTLS_SSL_DEBUG_MSG( 1, ( "outgoing message counter would wrap" ) );
nexpaq	0:6c56fb4bc5f0	2471	return( MBEDTLS_ERR_SSL_COUNTER_WRAPPING );
nexpaq	0:6c56fb4bc5f0	2472	}
nexpaq	0:6c56fb4bc5f0	2473
nexpaq	0:6c56fb4bc5f0	2474	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= flush output" ) );
nexpaq	0:6c56fb4bc5f0	2475
nexpaq	0:6c56fb4bc5f0	2476	return( 0 );
nexpaq	0:6c56fb4bc5f0	2477	}
nexpaq	0:6c56fb4bc5f0	2478
nexpaq	0:6c56fb4bc5f0	2479	/*
nexpaq	0:6c56fb4bc5f0	2480	* Functions to handle the DTLS retransmission state machine
nexpaq	0:6c56fb4bc5f0	2481	*/
nexpaq	0:6c56fb4bc5f0	2482	#if defined(MBEDTLS_SSL_PROTO_DTLS)
nexpaq	0:6c56fb4bc5f0	2483	/*
nexpaq	0:6c56fb4bc5f0	2484	* Append current handshake message to current outgoing flight
nexpaq	0:6c56fb4bc5f0	2485	*/
nexpaq	0:6c56fb4bc5f0	2486	static int ssl_flight_append( mbedtls_ssl_context *ssl )
nexpaq	0:6c56fb4bc5f0	2487	{
nexpaq	0:6c56fb4bc5f0	2488	mbedtls_ssl_flight_item *msg;
nexpaq	0:6c56fb4bc5f0	2489
nexpaq	0:6c56fb4bc5f0	2490	/* Allocate space for current message */
nexpaq	0:6c56fb4bc5f0	2491	if( ( msg = mbedtls_calloc( 1, sizeof( mbedtls_ssl_flight_item ) ) ) == NULL )
nexpaq	0:6c56fb4bc5f0	2492	{
nexpaq	0:6c56fb4bc5f0	2493	MBEDTLS_SSL_DEBUG_MSG( 1, ( "alloc %d bytes failed",
nexpaq	0:6c56fb4bc5f0	2494	sizeof( mbedtls_ssl_flight_item ) ) );
nexpaq	0:6c56fb4bc5f0	2495	return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
nexpaq	0:6c56fb4bc5f0	2496	}
nexpaq	0:6c56fb4bc5f0	2497
nexpaq	0:6c56fb4bc5f0	2498	if( ( msg->p = mbedtls_calloc( 1, ssl->out_msglen ) ) == NULL )
nexpaq	0:6c56fb4bc5f0	2499	{
nexpaq	0:6c56fb4bc5f0	2500	MBEDTLS_SSL_DEBUG_MSG( 1, ( "alloc %d bytes failed", ssl->out_msglen ) );
nexpaq	0:6c56fb4bc5f0	2501	mbedtls_free( msg );
nexpaq	0:6c56fb4bc5f0	2502	return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
nexpaq	0:6c56fb4bc5f0	2503	}
nexpaq	0:6c56fb4bc5f0	2504
nexpaq	0:6c56fb4bc5f0	2505	/* Copy current handshake message with headers */
nexpaq	0:6c56fb4bc5f0	2506	memcpy( msg->p, ssl->out_msg, ssl->out_msglen );
nexpaq	0:6c56fb4bc5f0	2507	msg->len = ssl->out_msglen;
nexpaq	0:6c56fb4bc5f0	2508	msg->type = ssl->out_msgtype;
nexpaq	0:6c56fb4bc5f0	2509	msg->next = NULL;
nexpaq	0:6c56fb4bc5f0	2510
nexpaq	0:6c56fb4bc5f0	2511	/* Append to the current flight */
nexpaq	0:6c56fb4bc5f0	2512	if( ssl->handshake->flight == NULL )
nexpaq	0:6c56fb4bc5f0	2513	ssl->handshake->flight = msg;
nexpaq	0:6c56fb4bc5f0	2514	else
nexpaq	0:6c56fb4bc5f0	2515	{
nexpaq	0:6c56fb4bc5f0	2516	mbedtls_ssl_flight_item *cur = ssl->handshake->flight;
nexpaq	0:6c56fb4bc5f0	2517	while( cur->next != NULL )
nexpaq	0:6c56fb4bc5f0	2518	cur = cur->next;
nexpaq	0:6c56fb4bc5f0	2519	cur->next = msg;
nexpaq	0:6c56fb4bc5f0	2520	}
nexpaq	0:6c56fb4bc5f0	2521
nexpaq	0:6c56fb4bc5f0	2522	return( 0 );
nexpaq	0:6c56fb4bc5f0	2523	}
nexpaq	0:6c56fb4bc5f0	2524
nexpaq	0:6c56fb4bc5f0	2525	/*
nexpaq	0:6c56fb4bc5f0	2526	* Free the current flight of handshake messages
nexpaq	0:6c56fb4bc5f0	2527	*/
nexpaq	0:6c56fb4bc5f0	2528	static void ssl_flight_free( mbedtls_ssl_flight_item *flight )
nexpaq	0:6c56fb4bc5f0	2529	{
nexpaq	0:6c56fb4bc5f0	2530	mbedtls_ssl_flight_item *cur = flight;
nexpaq	0:6c56fb4bc5f0	2531	mbedtls_ssl_flight_item *next;
nexpaq	0:6c56fb4bc5f0	2532
nexpaq	0:6c56fb4bc5f0	2533	while( cur != NULL )
nexpaq	0:6c56fb4bc5f0	2534	{
nexpaq	0:6c56fb4bc5f0	2535	next = cur->next;
nexpaq	0:6c56fb4bc5f0	2536
nexpaq	0:6c56fb4bc5f0	2537	mbedtls_free( cur->p );
nexpaq	0:6c56fb4bc5f0	2538	mbedtls_free( cur );
nexpaq	0:6c56fb4bc5f0	2539
nexpaq	0:6c56fb4bc5f0	2540	cur = next;
nexpaq	0:6c56fb4bc5f0	2541	}
nexpaq	0:6c56fb4bc5f0	2542	}
nexpaq	0:6c56fb4bc5f0	2543
nexpaq	0:6c56fb4bc5f0	2544	#if defined(MBEDTLS_SSL_DTLS_ANTI_REPLAY)
nexpaq	0:6c56fb4bc5f0	2545	static void ssl_dtls_replay_reset( mbedtls_ssl_context *ssl );
nexpaq	0:6c56fb4bc5f0	2546	#endif
nexpaq	0:6c56fb4bc5f0	2547
nexpaq	0:6c56fb4bc5f0	2548	/*
nexpaq	0:6c56fb4bc5f0	2549	* Swap transform_out and out_ctr with the alternative ones
nexpaq	0:6c56fb4bc5f0	2550	*/
nexpaq	0:6c56fb4bc5f0	2551	static void ssl_swap_epochs( mbedtls_ssl_context *ssl )
nexpaq	0:6c56fb4bc5f0	2552	{
nexpaq	0:6c56fb4bc5f0	2553	mbedtls_ssl_transform *tmp_transform;
nexpaq	0:6c56fb4bc5f0	2554	unsigned char tmp_out_ctr[8];
nexpaq	0:6c56fb4bc5f0	2555
nexpaq	0:6c56fb4bc5f0	2556	if( ssl->transform_out == ssl->handshake->alt_transform_out )
nexpaq	0:6c56fb4bc5f0	2557	{
nexpaq	0:6c56fb4bc5f0	2558	MBEDTLS_SSL_DEBUG_MSG( 3, ( "skip swap epochs" ) );
nexpaq	0:6c56fb4bc5f0	2559	return;
nexpaq	0:6c56fb4bc5f0	2560	}
nexpaq	0:6c56fb4bc5f0	2561
nexpaq	0:6c56fb4bc5f0	2562	MBEDTLS_SSL_DEBUG_MSG( 3, ( "swap epochs" ) );
nexpaq	0:6c56fb4bc5f0	2563
nexpaq	0:6c56fb4bc5f0	2564	/* Swap transforms */
nexpaq	0:6c56fb4bc5f0	2565	tmp_transform = ssl->transform_out;
nexpaq	0:6c56fb4bc5f0	2566	ssl->transform_out = ssl->handshake->alt_transform_out;
nexpaq	0:6c56fb4bc5f0	2567	ssl->handshake->alt_transform_out = tmp_transform;
nexpaq	0:6c56fb4bc5f0	2568
nexpaq	0:6c56fb4bc5f0	2569	/* Swap epoch + sequence_number */
nexpaq	0:6c56fb4bc5f0	2570	memcpy( tmp_out_ctr, ssl->out_ctr, 8 );
nexpaq	0:6c56fb4bc5f0	2571	memcpy( ssl->out_ctr, ssl->handshake->alt_out_ctr, 8 );
nexpaq	0:6c56fb4bc5f0	2572	memcpy( ssl->handshake->alt_out_ctr, tmp_out_ctr, 8 );
nexpaq	0:6c56fb4bc5f0	2573
nexpaq	0:6c56fb4bc5f0	2574	/* Adjust to the newly activated transform */
nexpaq	0:6c56fb4bc5f0	2575	if( ssl->transform_out != NULL &&
nexpaq	0:6c56fb4bc5f0	2576	ssl->minor_ver >= MBEDTLS_SSL_MINOR_VERSION_2 )
nexpaq	0:6c56fb4bc5f0	2577	{
nexpaq	0:6c56fb4bc5f0	2578	ssl->out_msg = ssl->out_iv + ssl->transform_out->ivlen -
nexpaq	0:6c56fb4bc5f0	2579	ssl->transform_out->fixed_ivlen;
nexpaq	0:6c56fb4bc5f0	2580	}
nexpaq	0:6c56fb4bc5f0	2581	else
nexpaq	0:6c56fb4bc5f0	2582	ssl->out_msg = ssl->out_iv;
nexpaq	0:6c56fb4bc5f0	2583
nexpaq	0:6c56fb4bc5f0	2584	#if defined(MBEDTLS_SSL_HW_RECORD_ACCEL)
nexpaq	0:6c56fb4bc5f0	2585	if( mbedtls_ssl_hw_record_activate != NULL )
nexpaq	0:6c56fb4bc5f0	2586	{
nexpaq	0:6c56fb4bc5f0	2587	if( ( ret = mbedtls_ssl_hw_record_activate( ssl, MBEDTLS_SSL_CHANNEL_OUTBOUND ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	2588	{
nexpaq	0:6c56fb4bc5f0	2589	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_hw_record_activate", ret );
nexpaq	0:6c56fb4bc5f0	2590	return( MBEDTLS_ERR_SSL_HW_ACCEL_FAILED );
nexpaq	0:6c56fb4bc5f0	2591	}
nexpaq	0:6c56fb4bc5f0	2592	}
nexpaq	0:6c56fb4bc5f0	2593	#endif
nexpaq	0:6c56fb4bc5f0	2594	}
nexpaq	0:6c56fb4bc5f0	2595
nexpaq	0:6c56fb4bc5f0	2596	/*
nexpaq	0:6c56fb4bc5f0	2597	* Retransmit the current flight of messages.
nexpaq	0:6c56fb4bc5f0	2598	*
nexpaq	0:6c56fb4bc5f0	2599	* Need to remember the current message in case flush_output returns
nexpaq	0:6c56fb4bc5f0	2600	* WANT_WRITE, causing us to exit this function and come back later.
nexpaq	0:6c56fb4bc5f0	2601	* This function must be called until state is no longer SENDING.
nexpaq	0:6c56fb4bc5f0	2602	*/
nexpaq	0:6c56fb4bc5f0	2603	int mbedtls_ssl_resend( mbedtls_ssl_context *ssl )
nexpaq	0:6c56fb4bc5f0	2604	{
nexpaq	0:6c56fb4bc5f0	2605	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> mbedtls_ssl_resend" ) );
nexpaq	0:6c56fb4bc5f0	2606
nexpaq	0:6c56fb4bc5f0	2607	if( ssl->handshake->retransmit_state != MBEDTLS_SSL_RETRANS_SENDING )
nexpaq	0:6c56fb4bc5f0	2608	{
nexpaq	0:6c56fb4bc5f0	2609	MBEDTLS_SSL_DEBUG_MSG( 2, ( "initialise resending" ) );
nexpaq	0:6c56fb4bc5f0	2610
nexpaq	0:6c56fb4bc5f0	2611	ssl->handshake->cur_msg = ssl->handshake->flight;
nexpaq	0:6c56fb4bc5f0	2612	ssl_swap_epochs( ssl );
nexpaq	0:6c56fb4bc5f0	2613
nexpaq	0:6c56fb4bc5f0	2614	ssl->handshake->retransmit_state = MBEDTLS_SSL_RETRANS_SENDING;
nexpaq	0:6c56fb4bc5f0	2615	}
nexpaq	0:6c56fb4bc5f0	2616
nexpaq	0:6c56fb4bc5f0	2617	while( ssl->handshake->cur_msg != NULL )
nexpaq	0:6c56fb4bc5f0	2618	{
nexpaq	0:6c56fb4bc5f0	2619	int ret;
nexpaq	0:6c56fb4bc5f0	2620	mbedtls_ssl_flight_item *cur = ssl->handshake->cur_msg;
nexpaq	0:6c56fb4bc5f0	2621
nexpaq	0:6c56fb4bc5f0	2622	/* Swap epochs before sending Finished: we can't do it after
nexpaq	0:6c56fb4bc5f0	2623	* sending ChangeCipherSpec, in case write returns WANT_READ.
nexpaq	0:6c56fb4bc5f0	2624	* Must be done before copying, may change out_msg pointer */
nexpaq	0:6c56fb4bc5f0	2625	if( cur->type == MBEDTLS_SSL_MSG_HANDSHAKE &&
nexpaq	0:6c56fb4bc5f0	2626	cur->p[0] == MBEDTLS_SSL_HS_FINISHED )
nexpaq	0:6c56fb4bc5f0	2627	{
nexpaq	0:6c56fb4bc5f0	2628	ssl_swap_epochs( ssl );
nexpaq	0:6c56fb4bc5f0	2629	}
nexpaq	0:6c56fb4bc5f0	2630
nexpaq	0:6c56fb4bc5f0	2631	memcpy( ssl->out_msg, cur->p, cur->len );
nexpaq	0:6c56fb4bc5f0	2632	ssl->out_msglen = cur->len;
nexpaq	0:6c56fb4bc5f0	2633	ssl->out_msgtype = cur->type;
nexpaq	0:6c56fb4bc5f0	2634
nexpaq	0:6c56fb4bc5f0	2635	ssl->handshake->cur_msg = cur->next;
nexpaq	0:6c56fb4bc5f0	2636
nexpaq	0:6c56fb4bc5f0	2637	MBEDTLS_SSL_DEBUG_BUF( 3, "resent handshake message header", ssl->out_msg, 12 );
nexpaq	0:6c56fb4bc5f0	2638
nexpaq	0:6c56fb4bc5f0	2639	if( ( ret = mbedtls_ssl_write_record( ssl ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	2640	{
nexpaq	0:6c56fb4bc5f0	2641	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_write_record", ret );
nexpaq	0:6c56fb4bc5f0	2642	return( ret );
nexpaq	0:6c56fb4bc5f0	2643	}
nexpaq	0:6c56fb4bc5f0	2644	}
nexpaq	0:6c56fb4bc5f0	2645
nexpaq	0:6c56fb4bc5f0	2646	if( ssl->state == MBEDTLS_SSL_HANDSHAKE_OVER )
nexpaq	0:6c56fb4bc5f0	2647	ssl->handshake->retransmit_state = MBEDTLS_SSL_RETRANS_FINISHED;
nexpaq	0:6c56fb4bc5f0	2648	else
nexpaq	0:6c56fb4bc5f0	2649	{
nexpaq	0:6c56fb4bc5f0	2650	ssl->handshake->retransmit_state = MBEDTLS_SSL_RETRANS_WAITING;
nexpaq	0:6c56fb4bc5f0	2651	ssl_set_timer( ssl, ssl->handshake->retransmit_timeout );
nexpaq	0:6c56fb4bc5f0	2652	}
nexpaq	0:6c56fb4bc5f0	2653
nexpaq	0:6c56fb4bc5f0	2654	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= mbedtls_ssl_resend" ) );
nexpaq	0:6c56fb4bc5f0	2655
nexpaq	0:6c56fb4bc5f0	2656	return( 0 );
nexpaq	0:6c56fb4bc5f0	2657	}
nexpaq	0:6c56fb4bc5f0	2658
nexpaq	0:6c56fb4bc5f0	2659	/*
nexpaq	0:6c56fb4bc5f0	2660	* To be called when the last message of an incoming flight is received.
nexpaq	0:6c56fb4bc5f0	2661	*/
nexpaq	0:6c56fb4bc5f0	2662	void mbedtls_ssl_recv_flight_completed( mbedtls_ssl_context *ssl )
nexpaq	0:6c56fb4bc5f0	2663	{
nexpaq	0:6c56fb4bc5f0	2664	/* We won't need to resend that one any more */
nexpaq	0:6c56fb4bc5f0	2665	ssl_flight_free( ssl->handshake->flight );
nexpaq	0:6c56fb4bc5f0	2666	ssl->handshake->flight = NULL;
nexpaq	0:6c56fb4bc5f0	2667	ssl->handshake->cur_msg = NULL;
nexpaq	0:6c56fb4bc5f0	2668
nexpaq	0:6c56fb4bc5f0	2669	/* The next incoming flight will start with this msg_seq */
nexpaq	0:6c56fb4bc5f0	2670	ssl->handshake->in_flight_start_seq = ssl->handshake->in_msg_seq;
nexpaq	0:6c56fb4bc5f0	2671
nexpaq	0:6c56fb4bc5f0	2672	/* Cancel timer */
nexpaq	0:6c56fb4bc5f0	2673	ssl_set_timer( ssl, 0 );
nexpaq	0:6c56fb4bc5f0	2674
nexpaq	0:6c56fb4bc5f0	2675	if( ssl->in_msgtype == MBEDTLS_SSL_MSG_HANDSHAKE &&
nexpaq	0:6c56fb4bc5f0	2676	ssl->in_msg[0] == MBEDTLS_SSL_HS_FINISHED )
nexpaq	0:6c56fb4bc5f0	2677	{
nexpaq	0:6c56fb4bc5f0	2678	ssl->handshake->retransmit_state = MBEDTLS_SSL_RETRANS_FINISHED;
nexpaq	0:6c56fb4bc5f0	2679	}
nexpaq	0:6c56fb4bc5f0	2680	else
nexpaq	0:6c56fb4bc5f0	2681	ssl->handshake->retransmit_state = MBEDTLS_SSL_RETRANS_PREPARING;
nexpaq	0:6c56fb4bc5f0	2682	}
nexpaq	0:6c56fb4bc5f0	2683
nexpaq	0:6c56fb4bc5f0	2684	/*
nexpaq	0:6c56fb4bc5f0	2685	* To be called when the last message of an outgoing flight is send.
nexpaq	0:6c56fb4bc5f0	2686	*/
nexpaq	0:6c56fb4bc5f0	2687	void mbedtls_ssl_send_flight_completed( mbedtls_ssl_context *ssl )
nexpaq	0:6c56fb4bc5f0	2688	{
nexpaq	0:6c56fb4bc5f0	2689	ssl_reset_retransmit_timeout( ssl );
nexpaq	0:6c56fb4bc5f0	2690	ssl_set_timer( ssl, ssl->handshake->retransmit_timeout );
nexpaq	0:6c56fb4bc5f0	2691
nexpaq	0:6c56fb4bc5f0	2692	if( ssl->in_msgtype == MBEDTLS_SSL_MSG_HANDSHAKE &&
nexpaq	0:6c56fb4bc5f0	2693	ssl->in_msg[0] == MBEDTLS_SSL_HS_FINISHED )
nexpaq	0:6c56fb4bc5f0	2694	{
nexpaq	0:6c56fb4bc5f0	2695	ssl->handshake->retransmit_state = MBEDTLS_SSL_RETRANS_FINISHED;
nexpaq	0:6c56fb4bc5f0	2696	}
nexpaq	0:6c56fb4bc5f0	2697	else
nexpaq	0:6c56fb4bc5f0	2698	ssl->handshake->retransmit_state = MBEDTLS_SSL_RETRANS_WAITING;
nexpaq	0:6c56fb4bc5f0	2699	}
nexpaq	0:6c56fb4bc5f0	2700	#endif /* MBEDTLS_SSL_PROTO_DTLS */
nexpaq	0:6c56fb4bc5f0	2701
nexpaq	0:6c56fb4bc5f0	2702	/*
nexpaq	0:6c56fb4bc5f0	2703	* Record layer functions
nexpaq	0:6c56fb4bc5f0	2704	*/
nexpaq	0:6c56fb4bc5f0	2705
nexpaq	0:6c56fb4bc5f0	2706	/*
nexpaq	0:6c56fb4bc5f0	2707	* Write current record.
nexpaq	0:6c56fb4bc5f0	2708	* Uses ssl->out_msgtype, ssl->out_msglen and bytes at ssl->out_msg.
nexpaq	0:6c56fb4bc5f0	2709	*/
nexpaq	0:6c56fb4bc5f0	2710	int mbedtls_ssl_write_record( mbedtls_ssl_context *ssl )
nexpaq	0:6c56fb4bc5f0	2711	{
nexpaq	0:6c56fb4bc5f0	2712	int ret, done = 0, out_msg_type;
nexpaq	0:6c56fb4bc5f0	2713	size_t len = ssl->out_msglen;
nexpaq	0:6c56fb4bc5f0	2714
nexpaq	0:6c56fb4bc5f0	2715	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write record" ) );
nexpaq	0:6c56fb4bc5f0	2716
nexpaq	0:6c56fb4bc5f0	2717	#if defined(MBEDTLS_SSL_PROTO_DTLS)
nexpaq	0:6c56fb4bc5f0	2718	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM &&
nexpaq	0:6c56fb4bc5f0	2719	ssl->handshake != NULL &&
nexpaq	0:6c56fb4bc5f0	2720	ssl->handshake->retransmit_state == MBEDTLS_SSL_RETRANS_SENDING )
nexpaq	0:6c56fb4bc5f0	2721	{
nexpaq	0:6c56fb4bc5f0	2722	; /* Skip special handshake treatment when resending */
nexpaq	0:6c56fb4bc5f0	2723	}
nexpaq	0:6c56fb4bc5f0	2724	else
nexpaq	0:6c56fb4bc5f0	2725	#endif
nexpaq	0:6c56fb4bc5f0	2726	if( ssl->out_msgtype == MBEDTLS_SSL_MSG_HANDSHAKE )
nexpaq	0:6c56fb4bc5f0	2727	{
nexpaq	0:6c56fb4bc5f0	2728	out_msg_type = ssl->out_msg[0];
nexpaq	0:6c56fb4bc5f0	2729
nexpaq	0:6c56fb4bc5f0	2730	if( out_msg_type != MBEDTLS_SSL_HS_HELLO_REQUEST &&
nexpaq	0:6c56fb4bc5f0	2731	ssl->handshake == NULL )
nexpaq	0:6c56fb4bc5f0	2732	{
nexpaq	0:6c56fb4bc5f0	2733	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
nexpaq	0:6c56fb4bc5f0	2734	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
nexpaq	0:6c56fb4bc5f0	2735	}
nexpaq	0:6c56fb4bc5f0	2736
nexpaq	0:6c56fb4bc5f0	2737	ssl->out_msg[1] = (unsigned char)( ( len - 4 ) >> 16 );
nexpaq	0:6c56fb4bc5f0	2738	ssl->out_msg[2] = (unsigned char)( ( len - 4 ) >> 8 );
nexpaq	0:6c56fb4bc5f0	2739	ssl->out_msg[3] = (unsigned char)( ( len - 4 ) );
nexpaq	0:6c56fb4bc5f0	2740
nexpaq	0:6c56fb4bc5f0	2741	/*
nexpaq	0:6c56fb4bc5f0	2742	* DTLS has additional fields in the Handshake layer,
nexpaq	0:6c56fb4bc5f0	2743	* between the length field and the actual payload:
nexpaq	0:6c56fb4bc5f0	2744	* uint16 message_seq;
nexpaq	0:6c56fb4bc5f0	2745	* uint24 fragment_offset;
nexpaq	0:6c56fb4bc5f0	2746	* uint24 fragment_length;
nexpaq	0:6c56fb4bc5f0	2747	*/
nexpaq	0:6c56fb4bc5f0	2748	#if defined(MBEDTLS_SSL_PROTO_DTLS)
nexpaq	0:6c56fb4bc5f0	2749	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
nexpaq	0:6c56fb4bc5f0	2750	{
nexpaq	0:6c56fb4bc5f0	2751	/* Make room for the additional DTLS fields */
nexpaq	0:6c56fb4bc5f0	2752	memmove( ssl->out_msg + 12, ssl->out_msg + 4, len - 4 );
nexpaq	0:6c56fb4bc5f0	2753	ssl->out_msglen += 8;
nexpaq	0:6c56fb4bc5f0	2754	len += 8;
nexpaq	0:6c56fb4bc5f0	2755
nexpaq	0:6c56fb4bc5f0	2756	/* Write message_seq and update it, except for HelloRequest */
nexpaq	0:6c56fb4bc5f0	2757	if( out_msg_type != MBEDTLS_SSL_HS_HELLO_REQUEST )
nexpaq	0:6c56fb4bc5f0	2758	{
nexpaq	0:6c56fb4bc5f0	2759	ssl->out_msg[4] = ( ssl->handshake->out_msg_seq >> 8 ) & 0xFF;
nexpaq	0:6c56fb4bc5f0	2760	ssl->out_msg[5] = ( ssl->handshake->out_msg_seq ) & 0xFF;
nexpaq	0:6c56fb4bc5f0	2761	++( ssl->handshake->out_msg_seq );
nexpaq	0:6c56fb4bc5f0	2762	}
nexpaq	0:6c56fb4bc5f0	2763	else
nexpaq	0:6c56fb4bc5f0	2764	{
nexpaq	0:6c56fb4bc5f0	2765	ssl->out_msg[4] = 0;
nexpaq	0:6c56fb4bc5f0	2766	ssl->out_msg[5] = 0;
nexpaq	0:6c56fb4bc5f0	2767	}
nexpaq	0:6c56fb4bc5f0	2768
nexpaq	0:6c56fb4bc5f0	2769	/* We don't fragment, so frag_offset = 0 and frag_len = len */
nexpaq	0:6c56fb4bc5f0	2770	memset( ssl->out_msg + 6, 0x00, 3 );
nexpaq	0:6c56fb4bc5f0	2771	memcpy( ssl->out_msg + 9, ssl->out_msg + 1, 3 );
nexpaq	0:6c56fb4bc5f0	2772	}
nexpaq	0:6c56fb4bc5f0	2773	#endif /* MBEDTLS_SSL_PROTO_DTLS */
nexpaq	0:6c56fb4bc5f0	2774
nexpaq	0:6c56fb4bc5f0	2775	if( out_msg_type != MBEDTLS_SSL_HS_HELLO_REQUEST )
nexpaq	0:6c56fb4bc5f0	2776	ssl->handshake->update_checksum( ssl, ssl->out_msg, len );
nexpaq	0:6c56fb4bc5f0	2777	}
nexpaq	0:6c56fb4bc5f0	2778
nexpaq	0:6c56fb4bc5f0	2779	/* Save handshake and CCS messages for resending */
nexpaq	0:6c56fb4bc5f0	2780	#if defined(MBEDTLS_SSL_PROTO_DTLS)
nexpaq	0:6c56fb4bc5f0	2781	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM &&
nexpaq	0:6c56fb4bc5f0	2782	ssl->handshake != NULL &&
nexpaq	0:6c56fb4bc5f0	2783	ssl->handshake->retransmit_state != MBEDTLS_SSL_RETRANS_SENDING &&
nexpaq	0:6c56fb4bc5f0	2784	( ssl->out_msgtype == MBEDTLS_SSL_MSG_CHANGE_CIPHER_SPEC \|\|
nexpaq	0:6c56fb4bc5f0	2785	ssl->out_msgtype == MBEDTLS_SSL_MSG_HANDSHAKE ) )
nexpaq	0:6c56fb4bc5f0	2786	{
nexpaq	0:6c56fb4bc5f0	2787	if( ( ret = ssl_flight_append( ssl ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	2788	{
nexpaq	0:6c56fb4bc5f0	2789	MBEDTLS_SSL_DEBUG_RET( 1, "ssl_flight_append", ret );
nexpaq	0:6c56fb4bc5f0	2790	return( ret );
nexpaq	0:6c56fb4bc5f0	2791	}
nexpaq	0:6c56fb4bc5f0	2792	}
nexpaq	0:6c56fb4bc5f0	2793	#endif
nexpaq	0:6c56fb4bc5f0	2794
nexpaq	0:6c56fb4bc5f0	2795	#if defined(MBEDTLS_ZLIB_SUPPORT)
nexpaq	0:6c56fb4bc5f0	2796	if( ssl->transform_out != NULL &&
nexpaq	0:6c56fb4bc5f0	2797	ssl->session_out->compression == MBEDTLS_SSL_COMPRESS_DEFLATE )
nexpaq	0:6c56fb4bc5f0	2798	{
nexpaq	0:6c56fb4bc5f0	2799	if( ( ret = ssl_compress_buf( ssl ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	2800	{
nexpaq	0:6c56fb4bc5f0	2801	MBEDTLS_SSL_DEBUG_RET( 1, "ssl_compress_buf", ret );
nexpaq	0:6c56fb4bc5f0	2802	return( ret );
nexpaq	0:6c56fb4bc5f0	2803	}
nexpaq	0:6c56fb4bc5f0	2804
nexpaq	0:6c56fb4bc5f0	2805	len = ssl->out_msglen;
nexpaq	0:6c56fb4bc5f0	2806	}
nexpaq	0:6c56fb4bc5f0	2807	#endif /MBEDTLS_ZLIB_SUPPORT /
nexpaq	0:6c56fb4bc5f0	2808
nexpaq	0:6c56fb4bc5f0	2809	#if defined(MBEDTLS_SSL_HW_RECORD_ACCEL)
nexpaq	0:6c56fb4bc5f0	2810	if( mbedtls_ssl_hw_record_write != NULL )
nexpaq	0:6c56fb4bc5f0	2811	{
nexpaq	0:6c56fb4bc5f0	2812	MBEDTLS_SSL_DEBUG_MSG( 2, ( "going for mbedtls_ssl_hw_record_write()" ) );
nexpaq	0:6c56fb4bc5f0	2813
nexpaq	0:6c56fb4bc5f0	2814	ret = mbedtls_ssl_hw_record_write( ssl );
nexpaq	0:6c56fb4bc5f0	2815	if( ret != 0 && ret != MBEDTLS_ERR_SSL_HW_ACCEL_FALLTHROUGH )
nexpaq	0:6c56fb4bc5f0	2816	{
nexpaq	0:6c56fb4bc5f0	2817	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_hw_record_write", ret );
nexpaq	0:6c56fb4bc5f0	2818	return( MBEDTLS_ERR_SSL_HW_ACCEL_FAILED );
nexpaq	0:6c56fb4bc5f0	2819	}
nexpaq	0:6c56fb4bc5f0	2820
nexpaq	0:6c56fb4bc5f0	2821	if( ret == 0 )
nexpaq	0:6c56fb4bc5f0	2822	done = 1;
nexpaq	0:6c56fb4bc5f0	2823	}
nexpaq	0:6c56fb4bc5f0	2824	#endif /* MBEDTLS_SSL_HW_RECORD_ACCEL */
nexpaq	0:6c56fb4bc5f0	2825	if( !done )
nexpaq	0:6c56fb4bc5f0	2826	{
nexpaq	0:6c56fb4bc5f0	2827	ssl->out_hdr[0] = (unsigned char) ssl->out_msgtype;
nexpaq	0:6c56fb4bc5f0	2828	mbedtls_ssl_write_version( ssl->major_ver, ssl->minor_ver,
nexpaq	0:6c56fb4bc5f0	2829	ssl->conf->transport, ssl->out_hdr + 1 );
nexpaq	0:6c56fb4bc5f0	2830
nexpaq	0:6c56fb4bc5f0	2831	ssl->out_len[0] = (unsigned char)( len >> 8 );
nexpaq	0:6c56fb4bc5f0	2832	ssl->out_len[1] = (unsigned char)( len );
nexpaq	0:6c56fb4bc5f0	2833
nexpaq	0:6c56fb4bc5f0	2834	if( ssl->transform_out != NULL )
nexpaq	0:6c56fb4bc5f0	2835	{
nexpaq	0:6c56fb4bc5f0	2836	if( ( ret = ssl_encrypt_buf( ssl ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	2837	{
nexpaq	0:6c56fb4bc5f0	2838	MBEDTLS_SSL_DEBUG_RET( 1, "ssl_encrypt_buf", ret );
nexpaq	0:6c56fb4bc5f0	2839	return( ret );
nexpaq	0:6c56fb4bc5f0	2840	}
nexpaq	0:6c56fb4bc5f0	2841
nexpaq	0:6c56fb4bc5f0	2842	len = ssl->out_msglen;
nexpaq	0:6c56fb4bc5f0	2843	ssl->out_len[0] = (unsigned char)( len >> 8 );
nexpaq	0:6c56fb4bc5f0	2844	ssl->out_len[1] = (unsigned char)( len );
nexpaq	0:6c56fb4bc5f0	2845	}
nexpaq	0:6c56fb4bc5f0	2846
nexpaq	0:6c56fb4bc5f0	2847	ssl->out_left = mbedtls_ssl_hdr_len( ssl ) + ssl->out_msglen;
nexpaq	0:6c56fb4bc5f0	2848
nexpaq	0:6c56fb4bc5f0	2849	MBEDTLS_SSL_DEBUG_MSG( 3, ( "output record: msgtype = %d, "
nexpaq	0:6c56fb4bc5f0	2850	"version = [%d:%d], msglen = %d",
nexpaq	0:6c56fb4bc5f0	2851	ssl->out_hdr[0], ssl->out_hdr[1], ssl->out_hdr[2],
nexpaq	0:6c56fb4bc5f0	2852	( ssl->out_len[0] << 8 ) \| ssl->out_len[1] ) );
nexpaq	0:6c56fb4bc5f0	2853
nexpaq	0:6c56fb4bc5f0	2854	MBEDTLS_SSL_DEBUG_BUF( 4, "output record sent to network",
nexpaq	0:6c56fb4bc5f0	2855	ssl->out_hdr, mbedtls_ssl_hdr_len( ssl ) + ssl->out_msglen );
nexpaq	0:6c56fb4bc5f0	2856	}
nexpaq	0:6c56fb4bc5f0	2857
nexpaq	0:6c56fb4bc5f0	2858	if( ( ret = mbedtls_ssl_flush_output( ssl ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	2859	{
nexpaq	0:6c56fb4bc5f0	2860	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_flush_output", ret );
nexpaq	0:6c56fb4bc5f0	2861	return( ret );
nexpaq	0:6c56fb4bc5f0	2862	}
nexpaq	0:6c56fb4bc5f0	2863
nexpaq	0:6c56fb4bc5f0	2864	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= write record" ) );
nexpaq	0:6c56fb4bc5f0	2865
nexpaq	0:6c56fb4bc5f0	2866	return( 0 );
nexpaq	0:6c56fb4bc5f0	2867	}
nexpaq	0:6c56fb4bc5f0	2868
nexpaq	0:6c56fb4bc5f0	2869	#if defined(MBEDTLS_SSL_PROTO_DTLS)
nexpaq	0:6c56fb4bc5f0	2870	/*
nexpaq	0:6c56fb4bc5f0	2871	* Mark bits in bitmask (used for DTLS HS reassembly)
nexpaq	0:6c56fb4bc5f0	2872	*/
nexpaq	0:6c56fb4bc5f0	2873	static void ssl_bitmask_set( unsigned char *mask, size_t offset, size_t len )
nexpaq	0:6c56fb4bc5f0	2874	{
nexpaq	0:6c56fb4bc5f0	2875	unsigned int start_bits, end_bits;
nexpaq	0:6c56fb4bc5f0	2876
nexpaq	0:6c56fb4bc5f0	2877	start_bits = 8 - ( offset % 8 );
nexpaq	0:6c56fb4bc5f0	2878	if( start_bits != 8 )
nexpaq	0:6c56fb4bc5f0	2879	{
nexpaq	0:6c56fb4bc5f0	2880	size_t first_byte_idx = offset / 8;
nexpaq	0:6c56fb4bc5f0	2881
nexpaq	0:6c56fb4bc5f0	2882	/* Special case */
nexpaq	0:6c56fb4bc5f0	2883	if( len <= start_bits )
nexpaq	0:6c56fb4bc5f0	2884	{
nexpaq	0:6c56fb4bc5f0	2885	for( ; len != 0; len-- )
nexpaq	0:6c56fb4bc5f0	2886	mask[first_byte_idx] \|= 1 << ( start_bits - len );
nexpaq	0:6c56fb4bc5f0	2887
nexpaq	0:6c56fb4bc5f0	2888	/* Avoid potential issues with offset or len becoming invalid */
nexpaq	0:6c56fb4bc5f0	2889	return;
nexpaq	0:6c56fb4bc5f0	2890	}
nexpaq	0:6c56fb4bc5f0	2891
nexpaq	0:6c56fb4bc5f0	2892	offset += start_bits; /* Now offset % 8 == 0 */
nexpaq	0:6c56fb4bc5f0	2893	len -= start_bits;
nexpaq	0:6c56fb4bc5f0	2894
nexpaq	0:6c56fb4bc5f0	2895	for( ; start_bits != 0; start_bits-- )
nexpaq	0:6c56fb4bc5f0	2896	mask[first_byte_idx] \|= 1 << ( start_bits - 1 );
nexpaq	0:6c56fb4bc5f0	2897	}
nexpaq	0:6c56fb4bc5f0	2898
nexpaq	0:6c56fb4bc5f0	2899	end_bits = len % 8;
nexpaq	0:6c56fb4bc5f0	2900	if( end_bits != 0 )
nexpaq	0:6c56fb4bc5f0	2901	{
nexpaq	0:6c56fb4bc5f0	2902	size_t last_byte_idx = ( offset + len ) / 8;
nexpaq	0:6c56fb4bc5f0	2903
nexpaq	0:6c56fb4bc5f0	2904	len -= end_bits; /* Now len % 8 == 0 */
nexpaq	0:6c56fb4bc5f0	2905
nexpaq	0:6c56fb4bc5f0	2906	for( ; end_bits != 0; end_bits-- )
nexpaq	0:6c56fb4bc5f0	2907	mask[last_byte_idx] \|= 1 << ( 8 - end_bits );
nexpaq	0:6c56fb4bc5f0	2908	}
nexpaq	0:6c56fb4bc5f0	2909
nexpaq	0:6c56fb4bc5f0	2910	memset( mask + offset / 8, 0xFF, len / 8 );
nexpaq	0:6c56fb4bc5f0	2911	}
nexpaq	0:6c56fb4bc5f0	2912
nexpaq	0:6c56fb4bc5f0	2913	/*
nexpaq	0:6c56fb4bc5f0	2914	* Check that bitmask is full
nexpaq	0:6c56fb4bc5f0	2915	*/
nexpaq	0:6c56fb4bc5f0	2916	static int ssl_bitmask_check( unsigned char *mask, size_t len )
nexpaq	0:6c56fb4bc5f0	2917	{
nexpaq	0:6c56fb4bc5f0	2918	size_t i;
nexpaq	0:6c56fb4bc5f0	2919
nexpaq	0:6c56fb4bc5f0	2920	for( i = 0; i < len / 8; i++ )
nexpaq	0:6c56fb4bc5f0	2921	if( mask[i] != 0xFF )
nexpaq	0:6c56fb4bc5f0	2922	return( -1 );
nexpaq	0:6c56fb4bc5f0	2923
nexpaq	0:6c56fb4bc5f0	2924	for( i = 0; i < len % 8; i++ )
nexpaq	0:6c56fb4bc5f0	2925	if( ( mask[len / 8] & ( 1 << ( 7 - i ) ) ) == 0 )
nexpaq	0:6c56fb4bc5f0	2926	return( -1 );
nexpaq	0:6c56fb4bc5f0	2927
nexpaq	0:6c56fb4bc5f0	2928	return( 0 );
nexpaq	0:6c56fb4bc5f0	2929	}
nexpaq	0:6c56fb4bc5f0	2930
nexpaq	0:6c56fb4bc5f0	2931	/*
nexpaq	0:6c56fb4bc5f0	2932	* Reassemble fragmented DTLS handshake messages.
nexpaq	0:6c56fb4bc5f0	2933	*
nexpaq	0:6c56fb4bc5f0	2934	* Use a temporary buffer for reassembly, divided in two parts:
nexpaq	0:6c56fb4bc5f0	2935	* - the first holds the reassembled message (including handshake header),
nexpaq	0:6c56fb4bc5f0	2936	* - the second holds a bitmask indicating which parts of the message
nexpaq	0:6c56fb4bc5f0	2937	* (excluding headers) have been received so far.
nexpaq	0:6c56fb4bc5f0	2938	*/
nexpaq	0:6c56fb4bc5f0	2939	static int ssl_reassemble_dtls_handshake( mbedtls_ssl_context *ssl )
nexpaq	0:6c56fb4bc5f0	2940	{
nexpaq	0:6c56fb4bc5f0	2941	unsigned char msg, bitmask;
nexpaq	0:6c56fb4bc5f0	2942	size_t frag_len, frag_off;
nexpaq	0:6c56fb4bc5f0	2943	size_t msg_len = ssl->in_hslen - 12; /* Without headers */
nexpaq	0:6c56fb4bc5f0	2944
nexpaq	0:6c56fb4bc5f0	2945	if( ssl->handshake == NULL )
nexpaq	0:6c56fb4bc5f0	2946	{
nexpaq	0:6c56fb4bc5f0	2947	MBEDTLS_SSL_DEBUG_MSG( 1, ( "not supported outside handshake (for now)" ) );
nexpaq	0:6c56fb4bc5f0	2948	return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE );
nexpaq	0:6c56fb4bc5f0	2949	}
nexpaq	0:6c56fb4bc5f0	2950
nexpaq	0:6c56fb4bc5f0	2951	/*
nexpaq	0:6c56fb4bc5f0	2952	* For first fragment, check size and allocate buffer
nexpaq	0:6c56fb4bc5f0	2953	*/
nexpaq	0:6c56fb4bc5f0	2954	if( ssl->handshake->hs_msg == NULL )
nexpaq	0:6c56fb4bc5f0	2955	{
nexpaq	0:6c56fb4bc5f0	2956	size_t alloc_len;
nexpaq	0:6c56fb4bc5f0	2957
nexpaq	0:6c56fb4bc5f0	2958	MBEDTLS_SSL_DEBUG_MSG( 2, ( "initialize reassembly, total length = %d",
nexpaq	0:6c56fb4bc5f0	2959	msg_len ) );
nexpaq	0:6c56fb4bc5f0	2960
nexpaq	0:6c56fb4bc5f0	2961	if( ssl->in_hslen > MBEDTLS_SSL_MAX_CONTENT_LEN )
nexpaq	0:6c56fb4bc5f0	2962	{
nexpaq	0:6c56fb4bc5f0	2963	MBEDTLS_SSL_DEBUG_MSG( 1, ( "handshake message too large" ) );
nexpaq	0:6c56fb4bc5f0	2964	return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE );
nexpaq	0:6c56fb4bc5f0	2965	}
nexpaq	0:6c56fb4bc5f0	2966
nexpaq	0:6c56fb4bc5f0	2967	/* The bitmask needs one bit per byte of message excluding header */
nexpaq	0:6c56fb4bc5f0	2968	alloc_len = 12 + msg_len + msg_len / 8 + ( msg_len % 8 != 0 );
nexpaq	0:6c56fb4bc5f0	2969
nexpaq	0:6c56fb4bc5f0	2970	ssl->handshake->hs_msg = mbedtls_calloc( 1, alloc_len );
nexpaq	0:6c56fb4bc5f0	2971	if( ssl->handshake->hs_msg == NULL )
nexpaq	0:6c56fb4bc5f0	2972	{
nexpaq	0:6c56fb4bc5f0	2973	MBEDTLS_SSL_DEBUG_MSG( 1, ( "alloc failed (%d bytes)", alloc_len ) );
nexpaq	0:6c56fb4bc5f0	2974	return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
nexpaq	0:6c56fb4bc5f0	2975	}
nexpaq	0:6c56fb4bc5f0	2976
nexpaq	0:6c56fb4bc5f0	2977	/* Prepare final header: copy msg_type, length and message_seq,
nexpaq	0:6c56fb4bc5f0	2978	* then add standardised fragment_offset and fragment_length */
nexpaq	0:6c56fb4bc5f0	2979	memcpy( ssl->handshake->hs_msg, ssl->in_msg, 6 );
nexpaq	0:6c56fb4bc5f0	2980	memset( ssl->handshake->hs_msg + 6, 0, 3 );
nexpaq	0:6c56fb4bc5f0	2981	memcpy( ssl->handshake->hs_msg + 9,
nexpaq	0:6c56fb4bc5f0	2982	ssl->handshake->hs_msg + 1, 3 );
nexpaq	0:6c56fb4bc5f0	2983	}
nexpaq	0:6c56fb4bc5f0	2984	else
nexpaq	0:6c56fb4bc5f0	2985	{
nexpaq	0:6c56fb4bc5f0	2986	/* Make sure msg_type and length are consistent */
nexpaq	0:6c56fb4bc5f0	2987	if( memcmp( ssl->handshake->hs_msg, ssl->in_msg, 4 ) != 0 )
nexpaq	0:6c56fb4bc5f0	2988	{
nexpaq	0:6c56fb4bc5f0	2989	MBEDTLS_SSL_DEBUG_MSG( 1, ( "fragment header mismatch" ) );
nexpaq	0:6c56fb4bc5f0	2990	return( MBEDTLS_ERR_SSL_INVALID_RECORD );
nexpaq	0:6c56fb4bc5f0	2991	}
nexpaq	0:6c56fb4bc5f0	2992	}
nexpaq	0:6c56fb4bc5f0	2993
nexpaq	0:6c56fb4bc5f0	2994	msg = ssl->handshake->hs_msg + 12;
nexpaq	0:6c56fb4bc5f0	2995	bitmask = msg + msg_len;
nexpaq	0:6c56fb4bc5f0	2996
nexpaq	0:6c56fb4bc5f0	2997	/*
nexpaq	0:6c56fb4bc5f0	2998	* Check and copy current fragment
nexpaq	0:6c56fb4bc5f0	2999	*/
nexpaq	0:6c56fb4bc5f0	3000	frag_off = ( ssl->in_msg[6] << 16 ) \|
nexpaq	0:6c56fb4bc5f0	3001	( ssl->in_msg[7] << 8 ) \|
nexpaq	0:6c56fb4bc5f0	3002	ssl->in_msg[8];
nexpaq	0:6c56fb4bc5f0	3003	frag_len = ( ssl->in_msg[9] << 16 ) \|
nexpaq	0:6c56fb4bc5f0	3004	( ssl->in_msg[10] << 8 ) \|
nexpaq	0:6c56fb4bc5f0	3005	ssl->in_msg[11];
nexpaq	0:6c56fb4bc5f0	3006
nexpaq	0:6c56fb4bc5f0	3007	if( frag_off + frag_len > msg_len )
nexpaq	0:6c56fb4bc5f0	3008	{
nexpaq	0:6c56fb4bc5f0	3009	MBEDTLS_SSL_DEBUG_MSG( 1, ( "invalid fragment offset/len: %d + %d > %d",
nexpaq	0:6c56fb4bc5f0	3010	frag_off, frag_len, msg_len ) );
nexpaq	0:6c56fb4bc5f0	3011	return( MBEDTLS_ERR_SSL_INVALID_RECORD );
nexpaq	0:6c56fb4bc5f0	3012	}
nexpaq	0:6c56fb4bc5f0	3013
nexpaq	0:6c56fb4bc5f0	3014	if( frag_len + 12 > ssl->in_msglen )
nexpaq	0:6c56fb4bc5f0	3015	{
nexpaq	0:6c56fb4bc5f0	3016	MBEDTLS_SSL_DEBUG_MSG( 1, ( "invalid fragment length: %d + 12 > %d",
nexpaq	0:6c56fb4bc5f0	3017	frag_len, ssl->in_msglen ) );
nexpaq	0:6c56fb4bc5f0	3018	return( MBEDTLS_ERR_SSL_INVALID_RECORD );
nexpaq	0:6c56fb4bc5f0	3019	}
nexpaq	0:6c56fb4bc5f0	3020
nexpaq	0:6c56fb4bc5f0	3021	MBEDTLS_SSL_DEBUG_MSG( 2, ( "adding fragment, offset = %d, length = %d",
nexpaq	0:6c56fb4bc5f0	3022	frag_off, frag_len ) );
nexpaq	0:6c56fb4bc5f0	3023
nexpaq	0:6c56fb4bc5f0	3024	memcpy( msg + frag_off, ssl->in_msg + 12, frag_len );
nexpaq	0:6c56fb4bc5f0	3025	ssl_bitmask_set( bitmask, frag_off, frag_len );
nexpaq	0:6c56fb4bc5f0	3026
nexpaq	0:6c56fb4bc5f0	3027	/*
nexpaq	0:6c56fb4bc5f0	3028	* Do we have the complete message by now?
nexpaq	0:6c56fb4bc5f0	3029	* If yes, finalize it, else ask to read the next record.
nexpaq	0:6c56fb4bc5f0	3030	*/
nexpaq	0:6c56fb4bc5f0	3031	if( ssl_bitmask_check( bitmask, msg_len ) != 0 )
nexpaq	0:6c56fb4bc5f0	3032	{
nexpaq	0:6c56fb4bc5f0	3033	MBEDTLS_SSL_DEBUG_MSG( 2, ( "message is not complete yet" ) );
nexpaq	0:6c56fb4bc5f0	3034	return( MBEDTLS_ERR_SSL_WANT_READ );
nexpaq	0:6c56fb4bc5f0	3035	}
nexpaq	0:6c56fb4bc5f0	3036
nexpaq	0:6c56fb4bc5f0	3037	MBEDTLS_SSL_DEBUG_MSG( 2, ( "handshake message completed" ) );
nexpaq	0:6c56fb4bc5f0	3038
nexpaq	0:6c56fb4bc5f0	3039	if( frag_len + 12 < ssl->in_msglen )
nexpaq	0:6c56fb4bc5f0	3040	{
nexpaq	0:6c56fb4bc5f0	3041	/*
nexpaq	0:6c56fb4bc5f0	3042	* We'got more handshake messages in the same record.
nexpaq	0:6c56fb4bc5f0	3043	* This case is not handled now because no know implementation does
nexpaq	0:6c56fb4bc5f0	3044	* that and it's hard to test, so we prefer to fail cleanly for now.
nexpaq	0:6c56fb4bc5f0	3045	*/
nexpaq	0:6c56fb4bc5f0	3046	MBEDTLS_SSL_DEBUG_MSG( 1, ( "last fragment not alone in its record" ) );
nexpaq	0:6c56fb4bc5f0	3047	return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE );
nexpaq	0:6c56fb4bc5f0	3048	}
nexpaq	0:6c56fb4bc5f0	3049
nexpaq	0:6c56fb4bc5f0	3050	if( ssl->in_left > ssl->next_record_offset )
nexpaq	0:6c56fb4bc5f0	3051	{
nexpaq	0:6c56fb4bc5f0	3052	/*
nexpaq	0:6c56fb4bc5f0	3053	* We've got more data in the buffer after the current record,
nexpaq	0:6c56fb4bc5f0	3054	* that we don't want to overwrite. Move it before writing the
nexpaq	0:6c56fb4bc5f0	3055	* reassembled message, and adjust in_left and next_record_offset.
nexpaq	0:6c56fb4bc5f0	3056	*/
nexpaq	0:6c56fb4bc5f0	3057	unsigned char *cur_remain = ssl->in_hdr + ssl->next_record_offset;
nexpaq	0:6c56fb4bc5f0	3058	unsigned char *new_remain = ssl->in_msg + ssl->in_hslen;
nexpaq	0:6c56fb4bc5f0	3059	size_t remain_len = ssl->in_left - ssl->next_record_offset;
nexpaq	0:6c56fb4bc5f0	3060
nexpaq	0:6c56fb4bc5f0	3061	/* First compute and check new lengths */
nexpaq	0:6c56fb4bc5f0	3062	ssl->next_record_offset = new_remain - ssl->in_hdr;
nexpaq	0:6c56fb4bc5f0	3063	ssl->in_left = ssl->next_record_offset + remain_len;
nexpaq	0:6c56fb4bc5f0	3064
nexpaq	0:6c56fb4bc5f0	3065	if( ssl->in_left > MBEDTLS_SSL_BUFFER_LEN -
nexpaq	0:6c56fb4bc5f0	3066	(size_t)( ssl->in_hdr - ssl->in_buf ) )
nexpaq	0:6c56fb4bc5f0	3067	{
nexpaq	0:6c56fb4bc5f0	3068	MBEDTLS_SSL_DEBUG_MSG( 1, ( "reassembled message too large for buffer" ) );
nexpaq	0:6c56fb4bc5f0	3069	return( MBEDTLS_ERR_SSL_BUFFER_TOO_SMALL );
nexpaq	0:6c56fb4bc5f0	3070	}
nexpaq	0:6c56fb4bc5f0	3071
nexpaq	0:6c56fb4bc5f0	3072	memmove( new_remain, cur_remain, remain_len );
nexpaq	0:6c56fb4bc5f0	3073	}
nexpaq	0:6c56fb4bc5f0	3074
nexpaq	0:6c56fb4bc5f0	3075	memcpy( ssl->in_msg, ssl->handshake->hs_msg, ssl->in_hslen );
nexpaq	0:6c56fb4bc5f0	3076
nexpaq	0:6c56fb4bc5f0	3077	mbedtls_free( ssl->handshake->hs_msg );
nexpaq	0:6c56fb4bc5f0	3078	ssl->handshake->hs_msg = NULL;
nexpaq	0:6c56fb4bc5f0	3079
nexpaq	0:6c56fb4bc5f0	3080	MBEDTLS_SSL_DEBUG_BUF( 3, "reassembled handshake message",
nexpaq	0:6c56fb4bc5f0	3081	ssl->in_msg, ssl->in_hslen );
nexpaq	0:6c56fb4bc5f0	3082
nexpaq	0:6c56fb4bc5f0	3083	return( 0 );
nexpaq	0:6c56fb4bc5f0	3084	}
nexpaq	0:6c56fb4bc5f0	3085	#endif /* MBEDTLS_SSL_PROTO_DTLS */
nexpaq	0:6c56fb4bc5f0	3086
nexpaq	0:6c56fb4bc5f0	3087	static int ssl_prepare_handshake_record( mbedtls_ssl_context *ssl )
nexpaq	0:6c56fb4bc5f0	3088	{
nexpaq	0:6c56fb4bc5f0	3089	if( ssl->in_msglen < mbedtls_ssl_hs_hdr_len( ssl ) )
nexpaq	0:6c56fb4bc5f0	3090	{
nexpaq	0:6c56fb4bc5f0	3091	MBEDTLS_SSL_DEBUG_MSG( 1, ( "handshake message too short: %d",
nexpaq	0:6c56fb4bc5f0	3092	ssl->in_msglen ) );
nexpaq	0:6c56fb4bc5f0	3093	return( MBEDTLS_ERR_SSL_INVALID_RECORD );
nexpaq	0:6c56fb4bc5f0	3094	}
nexpaq	0:6c56fb4bc5f0	3095
nexpaq	0:6c56fb4bc5f0	3096	ssl->in_hslen = mbedtls_ssl_hs_hdr_len( ssl ) + (
nexpaq	0:6c56fb4bc5f0	3097	( ssl->in_msg[1] << 16 ) \|
nexpaq	0:6c56fb4bc5f0	3098	( ssl->in_msg[2] << 8 ) \|
nexpaq	0:6c56fb4bc5f0	3099	ssl->in_msg[3] );
nexpaq	0:6c56fb4bc5f0	3100
nexpaq	0:6c56fb4bc5f0	3101	MBEDTLS_SSL_DEBUG_MSG( 3, ( "handshake message: msglen ="
nexpaq	0:6c56fb4bc5f0	3102	" %d, type = %d, hslen = %d",
nexpaq	0:6c56fb4bc5f0	3103	ssl->in_msglen, ssl->in_msg[0], ssl->in_hslen ) );
nexpaq	0:6c56fb4bc5f0	3104
nexpaq	0:6c56fb4bc5f0	3105	#if defined(MBEDTLS_SSL_PROTO_DTLS)
nexpaq	0:6c56fb4bc5f0	3106	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
nexpaq	0:6c56fb4bc5f0	3107	{
nexpaq	0:6c56fb4bc5f0	3108	int ret;
nexpaq	0:6c56fb4bc5f0	3109	unsigned int recv_msg_seq = ( ssl->in_msg[4] << 8 ) \| ssl->in_msg[5];
nexpaq	0:6c56fb4bc5f0	3110
nexpaq	0:6c56fb4bc5f0	3111	/* ssl->handshake is NULL when receiving ClientHello for renego */
nexpaq	0:6c56fb4bc5f0	3112	if( ssl->handshake != NULL &&
nexpaq	0:6c56fb4bc5f0	3113	recv_msg_seq != ssl->handshake->in_msg_seq )
nexpaq	0:6c56fb4bc5f0	3114	{
nexpaq	0:6c56fb4bc5f0	3115	/* Retransmit only on last message from previous flight, to avoid
nexpaq	0:6c56fb4bc5f0	3116	* too many retransmissions.
nexpaq	0:6c56fb4bc5f0	3117	* Besides, No sane server ever retransmits HelloVerifyRequest */
nexpaq	0:6c56fb4bc5f0	3118	if( recv_msg_seq == ssl->handshake->in_flight_start_seq - 1 &&
nexpaq	0:6c56fb4bc5f0	3119	ssl->in_msg[0] != MBEDTLS_SSL_HS_HELLO_VERIFY_REQUEST )
nexpaq	0:6c56fb4bc5f0	3120	{
nexpaq	0:6c56fb4bc5f0	3121	MBEDTLS_SSL_DEBUG_MSG( 2, ( "received message from last flight, "
nexpaq	0:6c56fb4bc5f0	3122	"message_seq = %d, start_of_flight = %d",
nexpaq	0:6c56fb4bc5f0	3123	recv_msg_seq,
nexpaq	0:6c56fb4bc5f0	3124	ssl->handshake->in_flight_start_seq ) );
nexpaq	0:6c56fb4bc5f0	3125
nexpaq	0:6c56fb4bc5f0	3126	if( ( ret = mbedtls_ssl_resend( ssl ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	3127	{
nexpaq	0:6c56fb4bc5f0	3128	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_resend", ret );
nexpaq	0:6c56fb4bc5f0	3129	return( ret );
nexpaq	0:6c56fb4bc5f0	3130	}
nexpaq	0:6c56fb4bc5f0	3131	}
nexpaq	0:6c56fb4bc5f0	3132	else
nexpaq	0:6c56fb4bc5f0	3133	{
nexpaq	0:6c56fb4bc5f0	3134	MBEDTLS_SSL_DEBUG_MSG( 2, ( "dropping out-of-sequence message: "
nexpaq	0:6c56fb4bc5f0	3135	"message_seq = %d, expected = %d",
nexpaq	0:6c56fb4bc5f0	3136	recv_msg_seq,
nexpaq	0:6c56fb4bc5f0	3137	ssl->handshake->in_msg_seq ) );
nexpaq	0:6c56fb4bc5f0	3138	}
nexpaq	0:6c56fb4bc5f0	3139
nexpaq	0:6c56fb4bc5f0	3140	return( MBEDTLS_ERR_SSL_WANT_READ );
nexpaq	0:6c56fb4bc5f0	3141	}
nexpaq	0:6c56fb4bc5f0	3142	/* Wait until message completion to increment in_msg_seq */
nexpaq	0:6c56fb4bc5f0	3143
nexpaq	0:6c56fb4bc5f0	3144	/* Reassemble if current message is fragmented or reassembly is
nexpaq	0:6c56fb4bc5f0	3145	* already in progress */
nexpaq	0:6c56fb4bc5f0	3146	if( ssl->in_msglen < ssl->in_hslen \|\|
nexpaq	0:6c56fb4bc5f0	3147	memcmp( ssl->in_msg + 6, "\0\0\0", 3 ) != 0 \|\|
nexpaq	0:6c56fb4bc5f0	3148	memcmp( ssl->in_msg + 9, ssl->in_msg + 1, 3 ) != 0 \|\|
nexpaq	0:6c56fb4bc5f0	3149	( ssl->handshake != NULL && ssl->handshake->hs_msg != NULL ) )
nexpaq	0:6c56fb4bc5f0	3150	{
nexpaq	0:6c56fb4bc5f0	3151	MBEDTLS_SSL_DEBUG_MSG( 2, ( "found fragmented DTLS handshake message" ) );
nexpaq	0:6c56fb4bc5f0	3152
nexpaq	0:6c56fb4bc5f0	3153	if( ( ret = ssl_reassemble_dtls_handshake( ssl ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	3154	{
nexpaq	0:6c56fb4bc5f0	3155	MBEDTLS_SSL_DEBUG_RET( 1, "ssl_reassemble_dtls_handshake", ret );
nexpaq	0:6c56fb4bc5f0	3156	return( ret );
nexpaq	0:6c56fb4bc5f0	3157	}
nexpaq	0:6c56fb4bc5f0	3158	}
nexpaq	0:6c56fb4bc5f0	3159	}
nexpaq	0:6c56fb4bc5f0	3160	else
nexpaq	0:6c56fb4bc5f0	3161	#endif /* MBEDTLS_SSL_PROTO_DTLS */
nexpaq	0:6c56fb4bc5f0	3162	/* With TLS we don't handle fragmentation (for now) */
nexpaq	0:6c56fb4bc5f0	3163	if( ssl->in_msglen < ssl->in_hslen )
nexpaq	0:6c56fb4bc5f0	3164	{
nexpaq	0:6c56fb4bc5f0	3165	MBEDTLS_SSL_DEBUG_MSG( 1, ( "TLS handshake fragmentation not supported" ) );
nexpaq	0:6c56fb4bc5f0	3166	return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE );
nexpaq	0:6c56fb4bc5f0	3167	}
nexpaq	0:6c56fb4bc5f0	3168
nexpaq	0:6c56fb4bc5f0	3169	if( ssl->state != MBEDTLS_SSL_HANDSHAKE_OVER &&
nexpaq	0:6c56fb4bc5f0	3170	ssl->handshake != NULL )
nexpaq	0:6c56fb4bc5f0	3171	{
nexpaq	0:6c56fb4bc5f0	3172	ssl->handshake->update_checksum( ssl, ssl->in_msg, ssl->in_hslen );
nexpaq	0:6c56fb4bc5f0	3173	}
nexpaq	0:6c56fb4bc5f0	3174
nexpaq	0:6c56fb4bc5f0	3175	/* Handshake message is complete, increment counter */
nexpaq	0:6c56fb4bc5f0	3176	#if defined(MBEDTLS_SSL_PROTO_DTLS)
nexpaq	0:6c56fb4bc5f0	3177	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM &&
nexpaq	0:6c56fb4bc5f0	3178	ssl->handshake != NULL )
nexpaq	0:6c56fb4bc5f0	3179	{
nexpaq	0:6c56fb4bc5f0	3180	ssl->handshake->in_msg_seq++;
nexpaq	0:6c56fb4bc5f0	3181	}
nexpaq	0:6c56fb4bc5f0	3182	#endif
nexpaq	0:6c56fb4bc5f0	3183
nexpaq	0:6c56fb4bc5f0	3184	return( 0 );
nexpaq	0:6c56fb4bc5f0	3185	}
nexpaq	0:6c56fb4bc5f0	3186
nexpaq	0:6c56fb4bc5f0	3187	/*
nexpaq	0:6c56fb4bc5f0	3188	* DTLS anti-replay: RFC 6347 4.1.2.6
nexpaq	0:6c56fb4bc5f0	3189	*
nexpaq	0:6c56fb4bc5f0	3190	* in_window is a field of bits numbered from 0 (lsb) to 63 (msb).
nexpaq	0:6c56fb4bc5f0	3191	* Bit n is set iff record number in_window_top - n has been seen.
nexpaq	0:6c56fb4bc5f0	3192	*
nexpaq	0:6c56fb4bc5f0	3193	* Usually, in_window_top is the last record number seen and the lsb of
nexpaq	0:6c56fb4bc5f0	3194	* in_window is set. The only exception is the initial state (record number 0
nexpaq	0:6c56fb4bc5f0	3195	* not seen yet).
nexpaq	0:6c56fb4bc5f0	3196	*/
nexpaq	0:6c56fb4bc5f0	3197	#if defined(MBEDTLS_SSL_DTLS_ANTI_REPLAY)
nexpaq	0:6c56fb4bc5f0	3198	static void ssl_dtls_replay_reset( mbedtls_ssl_context *ssl )
nexpaq	0:6c56fb4bc5f0	3199	{
nexpaq	0:6c56fb4bc5f0	3200	ssl->in_window_top = 0;
nexpaq	0:6c56fb4bc5f0	3201	ssl->in_window = 0;
nexpaq	0:6c56fb4bc5f0	3202	}
nexpaq	0:6c56fb4bc5f0	3203
nexpaq	0:6c56fb4bc5f0	3204	static inline uint64_t ssl_load_six_bytes( unsigned char *buf )
nexpaq	0:6c56fb4bc5f0	3205	{
nexpaq	0:6c56fb4bc5f0	3206	return( ( (uint64_t) buf[0] << 40 ) \|
nexpaq	0:6c56fb4bc5f0	3207	( (uint64_t) buf[1] << 32 ) \|
nexpaq	0:6c56fb4bc5f0	3208	( (uint64_t) buf[2] << 24 ) \|
nexpaq	0:6c56fb4bc5f0	3209	( (uint64_t) buf[3] << 16 ) \|
nexpaq	0:6c56fb4bc5f0	3210	( (uint64_t) buf[4] << 8 ) \|
nexpaq	0:6c56fb4bc5f0	3211	( (uint64_t) buf[5] ) );
nexpaq	0:6c56fb4bc5f0	3212	}
nexpaq	0:6c56fb4bc5f0	3213
nexpaq	0:6c56fb4bc5f0	3214	/*
nexpaq	0:6c56fb4bc5f0	3215	* Return 0 if sequence number is acceptable, -1 otherwise
nexpaq	0:6c56fb4bc5f0	3216	*/
nexpaq	0:6c56fb4bc5f0	3217	int mbedtls_ssl_dtls_replay_check( mbedtls_ssl_context *ssl )
nexpaq	0:6c56fb4bc5f0	3218	{
nexpaq	0:6c56fb4bc5f0	3219	uint64_t rec_seqnum = ssl_load_six_bytes( ssl->in_ctr + 2 );
nexpaq	0:6c56fb4bc5f0	3220	uint64_t bit;
nexpaq	0:6c56fb4bc5f0	3221
nexpaq	0:6c56fb4bc5f0	3222	if( ssl->conf->anti_replay == MBEDTLS_SSL_ANTI_REPLAY_DISABLED )
nexpaq	0:6c56fb4bc5f0	3223	return( 0 );
nexpaq	0:6c56fb4bc5f0	3224
nexpaq	0:6c56fb4bc5f0	3225	if( rec_seqnum > ssl->in_window_top )
nexpaq	0:6c56fb4bc5f0	3226	return( 0 );
nexpaq	0:6c56fb4bc5f0	3227
nexpaq	0:6c56fb4bc5f0	3228	bit = ssl->in_window_top - rec_seqnum;
nexpaq	0:6c56fb4bc5f0	3229
nexpaq	0:6c56fb4bc5f0	3230	if( bit >= 64 )
nexpaq	0:6c56fb4bc5f0	3231	return( -1 );
nexpaq	0:6c56fb4bc5f0	3232
nexpaq	0:6c56fb4bc5f0	3233	if( ( ssl->in_window & ( (uint64_t) 1 << bit ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	3234	return( -1 );
nexpaq	0:6c56fb4bc5f0	3235
nexpaq	0:6c56fb4bc5f0	3236	return( 0 );
nexpaq	0:6c56fb4bc5f0	3237	}
nexpaq	0:6c56fb4bc5f0	3238
nexpaq	0:6c56fb4bc5f0	3239	/*
nexpaq	0:6c56fb4bc5f0	3240	* Update replay window on new validated record
nexpaq	0:6c56fb4bc5f0	3241	*/
nexpaq	0:6c56fb4bc5f0	3242	void mbedtls_ssl_dtls_replay_update( mbedtls_ssl_context *ssl )
nexpaq	0:6c56fb4bc5f0	3243	{
nexpaq	0:6c56fb4bc5f0	3244	uint64_t rec_seqnum = ssl_load_six_bytes( ssl->in_ctr + 2 );
nexpaq	0:6c56fb4bc5f0	3245
nexpaq	0:6c56fb4bc5f0	3246	if( ssl->conf->anti_replay == MBEDTLS_SSL_ANTI_REPLAY_DISABLED )
nexpaq	0:6c56fb4bc5f0	3247	return;
nexpaq	0:6c56fb4bc5f0	3248
nexpaq	0:6c56fb4bc5f0	3249	if( rec_seqnum > ssl->in_window_top )
nexpaq	0:6c56fb4bc5f0	3250	{
nexpaq	0:6c56fb4bc5f0	3251	/* Update window_top and the contents of the window */
nexpaq	0:6c56fb4bc5f0	3252	uint64_t shift = rec_seqnum - ssl->in_window_top;
nexpaq	0:6c56fb4bc5f0	3253
nexpaq	0:6c56fb4bc5f0	3254	if( shift >= 64 )
nexpaq	0:6c56fb4bc5f0	3255	ssl->in_window = 1;
nexpaq	0:6c56fb4bc5f0	3256	else
nexpaq	0:6c56fb4bc5f0	3257	{
nexpaq	0:6c56fb4bc5f0	3258	ssl->in_window <<= shift;
nexpaq	0:6c56fb4bc5f0	3259	ssl->in_window \|= 1;
nexpaq	0:6c56fb4bc5f0	3260	}
nexpaq	0:6c56fb4bc5f0	3261
nexpaq	0:6c56fb4bc5f0	3262	ssl->in_window_top = rec_seqnum;
nexpaq	0:6c56fb4bc5f0	3263	}
nexpaq	0:6c56fb4bc5f0	3264	else
nexpaq	0:6c56fb4bc5f0	3265	{
nexpaq	0:6c56fb4bc5f0	3266	/* Mark that number as seen in the current window */
nexpaq	0:6c56fb4bc5f0	3267	uint64_t bit = ssl->in_window_top - rec_seqnum;
nexpaq	0:6c56fb4bc5f0	3268
nexpaq	0:6c56fb4bc5f0	3269	if( bit < 64 ) /* Always true, but be extra sure */
nexpaq	0:6c56fb4bc5f0	3270	ssl->in_window \|= (uint64_t) 1 << bit;
nexpaq	0:6c56fb4bc5f0	3271	}
nexpaq	0:6c56fb4bc5f0	3272	}
nexpaq	0:6c56fb4bc5f0	3273	#endif /* MBEDTLS_SSL_DTLS_ANTI_REPLAY */
nexpaq	0:6c56fb4bc5f0	3274
nexpaq	0:6c56fb4bc5f0	3275	#if defined(MBEDTLS_SSL_DTLS_CLIENT_PORT_REUSE) && defined(MBEDTLS_SSL_SRV_C)
nexpaq	0:6c56fb4bc5f0	3276	/* Forward declaration */
nexpaq	0:6c56fb4bc5f0	3277	static int ssl_session_reset_int( mbedtls_ssl_context *ssl, int partial );
nexpaq	0:6c56fb4bc5f0	3278
nexpaq	0:6c56fb4bc5f0	3279	/*
nexpaq	0:6c56fb4bc5f0	3280	* Without any SSL context, check if a datagram looks like a ClientHello with
nexpaq	0:6c56fb4bc5f0	3281	* a valid cookie, and if it doesn't, generate a HelloVerifyRequest message.
nexpaq	0:6c56fb4bc5f0	3282	* Both input and output include full DTLS headers.
nexpaq	0:6c56fb4bc5f0	3283	*
nexpaq	0:6c56fb4bc5f0	3284	* - if cookie is valid, return 0
nexpaq	0:6c56fb4bc5f0	3285	* - if ClientHello looks superficially valid but cookie is not,
nexpaq	0:6c56fb4bc5f0	3286	* fill obuf and set olen, then
nexpaq	0:6c56fb4bc5f0	3287	* return MBEDTLS_ERR_SSL_HELLO_VERIFY_REQUIRED
nexpaq	0:6c56fb4bc5f0	3288	* - otherwise return a specific error code
nexpaq	0:6c56fb4bc5f0	3289	*/
nexpaq	0:6c56fb4bc5f0	3290	static int ssl_check_dtls_clihlo_cookie(
nexpaq	0:6c56fb4bc5f0	3291	mbedtls_ssl_cookie_write_t *f_cookie_write,
nexpaq	0:6c56fb4bc5f0	3292	mbedtls_ssl_cookie_check_t *f_cookie_check,
nexpaq	0:6c56fb4bc5f0	3293	void *p_cookie,
nexpaq	0:6c56fb4bc5f0	3294	const unsigned char *cli_id, size_t cli_id_len,
nexpaq	0:6c56fb4bc5f0	3295	const unsigned char *in, size_t in_len,
nexpaq	0:6c56fb4bc5f0	3296	unsigned char obuf, size_t buf_len, size_t olen )
nexpaq	0:6c56fb4bc5f0	3297	{
nexpaq	0:6c56fb4bc5f0	3298	size_t sid_len, cookie_len;
nexpaq	0:6c56fb4bc5f0	3299	unsigned char *p;
nexpaq	0:6c56fb4bc5f0	3300
nexpaq	0:6c56fb4bc5f0	3301	if( f_cookie_write == NULL \|\| f_cookie_check == NULL )
nexpaq	0:6c56fb4bc5f0	3302	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
nexpaq	0:6c56fb4bc5f0	3303
nexpaq	0:6c56fb4bc5f0	3304	/*
nexpaq	0:6c56fb4bc5f0	3305	* Structure of ClientHello with record and handshake headers,
nexpaq	0:6c56fb4bc5f0	3306	* and expected values. We don't need to check a lot, more checks will be
nexpaq	0:6c56fb4bc5f0	3307	* done when actually parsing the ClientHello - skipping those checks
nexpaq	0:6c56fb4bc5f0	3308	* avoids code duplication and does not make cookie forging any easier.
nexpaq	0:6c56fb4bc5f0	3309	*
nexpaq	0:6c56fb4bc5f0	3310	* 0-0 ContentType type; copied, must be handshake
nexpaq	0:6c56fb4bc5f0	3311	* 1-2 ProtocolVersion version; copied
nexpaq	0:6c56fb4bc5f0	3312	* 3-4 uint16 epoch; copied, must be 0
nexpaq	0:6c56fb4bc5f0	3313	* 5-10 uint48 sequence_number; copied
nexpaq	0:6c56fb4bc5f0	3314	* 11-12 uint16 length; (ignored)
nexpaq	0:6c56fb4bc5f0	3315	*
nexpaq	0:6c56fb4bc5f0	3316	* 13-13 HandshakeType msg_type; (ignored)
nexpaq	0:6c56fb4bc5f0	3317	* 14-16 uint24 length; (ignored)
nexpaq	0:6c56fb4bc5f0	3318	* 17-18 uint16 message_seq; copied
nexpaq	0:6c56fb4bc5f0	3319	* 19-21 uint24 fragment_offset; copied, must be 0
nexpaq	0:6c56fb4bc5f0	3320	* 22-24 uint24 fragment_length; (ignored)
nexpaq	0:6c56fb4bc5f0	3321	*
nexpaq	0:6c56fb4bc5f0	3322	* 25-26 ProtocolVersion client_version; (ignored)
nexpaq	0:6c56fb4bc5f0	3323	* 27-58 Random random; (ignored)
nexpaq	0:6c56fb4bc5f0	3324	* 59-xx SessionID session_id; 1 byte len + sid_len content
nexpaq	0:6c56fb4bc5f0	3325	* 60+ opaque cookie<0..2^8-1>; 1 byte len + content
nexpaq	0:6c56fb4bc5f0	3326	* ...
nexpaq	0:6c56fb4bc5f0	3327	*
nexpaq	0:6c56fb4bc5f0	3328	* Minimum length is 61 bytes.
nexpaq	0:6c56fb4bc5f0	3329	*/
nexpaq	0:6c56fb4bc5f0	3330	if( in_len < 61 \|\|
nexpaq	0:6c56fb4bc5f0	3331	in[0] != MBEDTLS_SSL_MSG_HANDSHAKE \|\|
nexpaq	0:6c56fb4bc5f0	3332	in[3] != 0 \|\| in[4] != 0 \|\|
nexpaq	0:6c56fb4bc5f0	3333	in[19] != 0 \|\| in[20] != 0 \|\| in[21] != 0 )
nexpaq	0:6c56fb4bc5f0	3334	{
nexpaq	0:6c56fb4bc5f0	3335	return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
nexpaq	0:6c56fb4bc5f0	3336	}
nexpaq	0:6c56fb4bc5f0	3337
nexpaq	0:6c56fb4bc5f0	3338	sid_len = in[59];
nexpaq	0:6c56fb4bc5f0	3339	if( sid_len > in_len - 61 )
nexpaq	0:6c56fb4bc5f0	3340	return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
nexpaq	0:6c56fb4bc5f0	3341
nexpaq	0:6c56fb4bc5f0	3342	cookie_len = in[60 + sid_len];
nexpaq	0:6c56fb4bc5f0	3343	if( cookie_len > in_len - 60 )
nexpaq	0:6c56fb4bc5f0	3344	return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
nexpaq	0:6c56fb4bc5f0	3345
nexpaq	0:6c56fb4bc5f0	3346	if( f_cookie_check( p_cookie, in + sid_len + 61, cookie_len,
nexpaq	0:6c56fb4bc5f0	3347	cli_id, cli_id_len ) == 0 )
nexpaq	0:6c56fb4bc5f0	3348	{
nexpaq	0:6c56fb4bc5f0	3349	/* Valid cookie */
nexpaq	0:6c56fb4bc5f0	3350	return( 0 );
nexpaq	0:6c56fb4bc5f0	3351	}
nexpaq	0:6c56fb4bc5f0	3352
nexpaq	0:6c56fb4bc5f0	3353	/*
nexpaq	0:6c56fb4bc5f0	3354	* If we get here, we've got an invalid cookie, let's prepare HVR.
nexpaq	0:6c56fb4bc5f0	3355	*
nexpaq	0:6c56fb4bc5f0	3356	* 0-0 ContentType type; copied
nexpaq	0:6c56fb4bc5f0	3357	* 1-2 ProtocolVersion version; copied
nexpaq	0:6c56fb4bc5f0	3358	* 3-4 uint16 epoch; copied
nexpaq	0:6c56fb4bc5f0	3359	* 5-10 uint48 sequence_number; copied
nexpaq	0:6c56fb4bc5f0	3360	* 11-12 uint16 length; olen - 13
nexpaq	0:6c56fb4bc5f0	3361	*
nexpaq	0:6c56fb4bc5f0	3362	* 13-13 HandshakeType msg_type; hello_verify_request
nexpaq	0:6c56fb4bc5f0	3363	* 14-16 uint24 length; olen - 25
nexpaq	0:6c56fb4bc5f0	3364	* 17-18 uint16 message_seq; copied
nexpaq	0:6c56fb4bc5f0	3365	* 19-21 uint24 fragment_offset; copied
nexpaq	0:6c56fb4bc5f0	3366	* 22-24 uint24 fragment_length; olen - 25
nexpaq	0:6c56fb4bc5f0	3367	*
nexpaq	0:6c56fb4bc5f0	3368	* 25-26 ProtocolVersion server_version; 0xfe 0xff
nexpaq	0:6c56fb4bc5f0	3369	* 27-27 opaque cookie<0..2^8-1>; cookie_len = olen - 27, cookie
nexpaq	0:6c56fb4bc5f0	3370	*
nexpaq	0:6c56fb4bc5f0	3371	* Minimum length is 28.
nexpaq	0:6c56fb4bc5f0	3372	*/
nexpaq	0:6c56fb4bc5f0	3373	if( buf_len < 28 )
nexpaq	0:6c56fb4bc5f0	3374	return( MBEDTLS_ERR_SSL_BUFFER_TOO_SMALL );
nexpaq	0:6c56fb4bc5f0	3375
nexpaq	0:6c56fb4bc5f0	3376	/* Copy most fields and adapt others */
nexpaq	0:6c56fb4bc5f0	3377	memcpy( obuf, in, 25 );
nexpaq	0:6c56fb4bc5f0	3378	obuf[13] = MBEDTLS_SSL_HS_HELLO_VERIFY_REQUEST;
nexpaq	0:6c56fb4bc5f0	3379	obuf[25] = 0xfe;
nexpaq	0:6c56fb4bc5f0	3380	obuf[26] = 0xff;
nexpaq	0:6c56fb4bc5f0	3381
nexpaq	0:6c56fb4bc5f0	3382	/* Generate and write actual cookie */
nexpaq	0:6c56fb4bc5f0	3383	p = obuf + 28;
nexpaq	0:6c56fb4bc5f0	3384	if( f_cookie_write( p_cookie,
nexpaq	0:6c56fb4bc5f0	3385	&p, obuf + buf_len, cli_id, cli_id_len ) != 0 )
nexpaq	0:6c56fb4bc5f0	3386	{
nexpaq	0:6c56fb4bc5f0	3387	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
nexpaq	0:6c56fb4bc5f0	3388	}
nexpaq	0:6c56fb4bc5f0	3389
nexpaq	0:6c56fb4bc5f0	3390	*olen = p - obuf;
nexpaq	0:6c56fb4bc5f0	3391
nexpaq	0:6c56fb4bc5f0	3392	/* Go back and fill length fields */
nexpaq	0:6c56fb4bc5f0	3393	obuf[27] = (unsigned char)( *olen - 28 );
nexpaq	0:6c56fb4bc5f0	3394
nexpaq	0:6c56fb4bc5f0	3395	obuf[14] = obuf[22] = (unsigned char)( ( *olen - 25 ) >> 16 );
nexpaq	0:6c56fb4bc5f0	3396	obuf[15] = obuf[23] = (unsigned char)( ( *olen - 25 ) >> 8 );
nexpaq	0:6c56fb4bc5f0	3397	obuf[16] = obuf[24] = (unsigned char)( ( *olen - 25 ) );
nexpaq	0:6c56fb4bc5f0	3398
nexpaq	0:6c56fb4bc5f0	3399	obuf[11] = (unsigned char)( ( *olen - 13 ) >> 8 );
nexpaq	0:6c56fb4bc5f0	3400	obuf[12] = (unsigned char)( ( *olen - 13 ) );
nexpaq	0:6c56fb4bc5f0	3401
nexpaq	0:6c56fb4bc5f0	3402	return( MBEDTLS_ERR_SSL_HELLO_VERIFY_REQUIRED );
nexpaq	0:6c56fb4bc5f0	3403	}
nexpaq	0:6c56fb4bc5f0	3404
nexpaq	0:6c56fb4bc5f0	3405	/*
nexpaq	0:6c56fb4bc5f0	3406	* Handle possible client reconnect with the same UDP quadruplet
nexpaq	0:6c56fb4bc5f0	3407	* (RFC 6347 Section 4.2.8).
nexpaq	0:6c56fb4bc5f0	3408	*
nexpaq	0:6c56fb4bc5f0	3409	* Called by ssl_parse_record_header() in case we receive an epoch 0 record
nexpaq	0:6c56fb4bc5f0	3410	* that looks like a ClientHello.
nexpaq	0:6c56fb4bc5f0	3411	*
nexpaq	0:6c56fb4bc5f0	3412	* - if the input looks like a ClientHello without cookies,
nexpaq	0:6c56fb4bc5f0	3413	* send back HelloVerifyRequest, then
nexpaq	0:6c56fb4bc5f0	3414	* return MBEDTLS_ERR_SSL_HELLO_VERIFY_REQUIRED
nexpaq	0:6c56fb4bc5f0	3415	* - if the input looks like a ClientHello with a valid cookie,
nexpaq	0:6c56fb4bc5f0	3416	* reset the session of the current context, and
nexpaq	0:6c56fb4bc5f0	3417	* return MBEDTLS_ERR_SSL_CLIENT_RECONNECT
nexpaq	0:6c56fb4bc5f0	3418	* - if anything goes wrong, return a specific error code
nexpaq	0:6c56fb4bc5f0	3419	*
nexpaq	0:6c56fb4bc5f0	3420	* mbedtls_ssl_read_record() will ignore the record if anything else than
nexpaq	0:6c56fb4bc5f0	3421	* MBEDTLS_ERR_SSL_CLIENT_RECONNECT or 0 is returned, although this function
nexpaq	0:6c56fb4bc5f0	3422	* cannot not return 0.
nexpaq	0:6c56fb4bc5f0	3423	*/
nexpaq	0:6c56fb4bc5f0	3424	static int ssl_handle_possible_reconnect( mbedtls_ssl_context *ssl )
nexpaq	0:6c56fb4bc5f0	3425	{
nexpaq	0:6c56fb4bc5f0	3426	int ret;
nexpaq	0:6c56fb4bc5f0	3427	size_t len;
nexpaq	0:6c56fb4bc5f0	3428
nexpaq	0:6c56fb4bc5f0	3429	ret = ssl_check_dtls_clihlo_cookie(
nexpaq	0:6c56fb4bc5f0	3430	ssl->conf->f_cookie_write,
nexpaq	0:6c56fb4bc5f0	3431	ssl->conf->f_cookie_check,
nexpaq	0:6c56fb4bc5f0	3432	ssl->conf->p_cookie,
nexpaq	0:6c56fb4bc5f0	3433	ssl->cli_id, ssl->cli_id_len,
nexpaq	0:6c56fb4bc5f0	3434	ssl->in_buf, ssl->in_left,
nexpaq	0:6c56fb4bc5f0	3435	ssl->out_buf, MBEDTLS_SSL_MAX_CONTENT_LEN, &len );
nexpaq	0:6c56fb4bc5f0	3436
nexpaq	0:6c56fb4bc5f0	3437	MBEDTLS_SSL_DEBUG_RET( 2, "ssl_check_dtls_clihlo_cookie", ret );
nexpaq	0:6c56fb4bc5f0	3438
nexpaq	0:6c56fb4bc5f0	3439	if( ret == MBEDTLS_ERR_SSL_HELLO_VERIFY_REQUIRED )
nexpaq	0:6c56fb4bc5f0	3440	{
nexpaq	0:6c56fb4bc5f0	3441	/* Dont check write errors as we can't do anything here.
nexpaq	0:6c56fb4bc5f0	3442	* If the error is permanent we'll catch it later,
nexpaq	0:6c56fb4bc5f0	3443	* if it's not, then hopefully it'll work next time. */
nexpaq	0:6c56fb4bc5f0	3444	(void) ssl->f_send( ssl->p_bio, ssl->out_buf, len );
nexpaq	0:6c56fb4bc5f0	3445
nexpaq	0:6c56fb4bc5f0	3446	return( MBEDTLS_ERR_SSL_HELLO_VERIFY_REQUIRED );
nexpaq	0:6c56fb4bc5f0	3447	}
nexpaq	0:6c56fb4bc5f0	3448
nexpaq	0:6c56fb4bc5f0	3449	if( ret == 0 )
nexpaq	0:6c56fb4bc5f0	3450	{
nexpaq	0:6c56fb4bc5f0	3451	/* Got a valid cookie, partially reset context */
nexpaq	0:6c56fb4bc5f0	3452	if( ( ret = ssl_session_reset_int( ssl, 1 ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	3453	{
nexpaq	0:6c56fb4bc5f0	3454	MBEDTLS_SSL_DEBUG_RET( 1, "reset", ret );
nexpaq	0:6c56fb4bc5f0	3455	return( ret );
nexpaq	0:6c56fb4bc5f0	3456	}
nexpaq	0:6c56fb4bc5f0	3457
nexpaq	0:6c56fb4bc5f0	3458	return( MBEDTLS_ERR_SSL_CLIENT_RECONNECT );
nexpaq	0:6c56fb4bc5f0	3459	}
nexpaq	0:6c56fb4bc5f0	3460
nexpaq	0:6c56fb4bc5f0	3461	return( ret );
nexpaq	0:6c56fb4bc5f0	3462	}
nexpaq	0:6c56fb4bc5f0	3463	#endif /* MBEDTLS_SSL_DTLS_CLIENT_PORT_REUSE && MBEDTLS_SSL_SRV_C */
nexpaq	0:6c56fb4bc5f0	3464
nexpaq	0:6c56fb4bc5f0	3465	/*
nexpaq	0:6c56fb4bc5f0	3466	* ContentType type;
nexpaq	0:6c56fb4bc5f0	3467	* ProtocolVersion version;
nexpaq	0:6c56fb4bc5f0	3468	* uint16 epoch; // DTLS only
nexpaq	0:6c56fb4bc5f0	3469	* uint48 sequence_number; // DTLS only
nexpaq	0:6c56fb4bc5f0	3470	* uint16 length;
nexpaq	0:6c56fb4bc5f0	3471	*
nexpaq	0:6c56fb4bc5f0	3472	* Return 0 if header looks sane (and, for DTLS, the record is expected)
nexpaq	0:6c56fb4bc5f0	3473	* MBEDTLS_ERR_SSL_INVALID_RECORD if the header looks bad,
nexpaq	0:6c56fb4bc5f0	3474	* MBEDTLS_ERR_SSL_UNEXPECTED_RECORD (DTLS only) if sane but unexpected.
nexpaq	0:6c56fb4bc5f0	3475	*
nexpaq	0:6c56fb4bc5f0	3476	* With DTLS, mbedtls_ssl_read_record() will:
nexpaq	0:6c56fb4bc5f0	3477	* 1. proceed with the record if this function returns 0
nexpaq	0:6c56fb4bc5f0	3478	* 2. drop only the current record if this function returns UNEXPECTED_RECORD
nexpaq	0:6c56fb4bc5f0	3479	* 3. return CLIENT_RECONNECT if this function return that value
nexpaq	0:6c56fb4bc5f0	3480	* 4. drop the whole datagram if this function returns anything else.
nexpaq	0:6c56fb4bc5f0	3481	* Point 2 is needed when the peer is resending, and we have already received
nexpaq	0:6c56fb4bc5f0	3482	* the first record from a datagram but are still waiting for the others.
nexpaq	0:6c56fb4bc5f0	3483	*/
nexpaq	0:6c56fb4bc5f0	3484	static int ssl_parse_record_header( mbedtls_ssl_context *ssl )
nexpaq	0:6c56fb4bc5f0	3485	{
nexpaq	0:6c56fb4bc5f0	3486	int ret;
nexpaq	0:6c56fb4bc5f0	3487	int major_ver, minor_ver;
nexpaq	0:6c56fb4bc5f0	3488
nexpaq	0:6c56fb4bc5f0	3489	MBEDTLS_SSL_DEBUG_BUF( 4, "input record header", ssl->in_hdr, mbedtls_ssl_hdr_len( ssl ) );
nexpaq	0:6c56fb4bc5f0	3490
nexpaq	0:6c56fb4bc5f0	3491	ssl->in_msgtype = ssl->in_hdr[0];
nexpaq	0:6c56fb4bc5f0	3492	ssl->in_msglen = ( ssl->in_len[0] << 8 ) \| ssl->in_len[1];
nexpaq	0:6c56fb4bc5f0	3493	mbedtls_ssl_read_version( &major_ver, &minor_ver, ssl->conf->transport, ssl->in_hdr + 1 );
nexpaq	0:6c56fb4bc5f0	3494
nexpaq	0:6c56fb4bc5f0	3495	MBEDTLS_SSL_DEBUG_MSG( 3, ( "input record: msgtype = %d, "
nexpaq	0:6c56fb4bc5f0	3496	"version = [%d:%d], msglen = %d",
nexpaq	0:6c56fb4bc5f0	3497	ssl->in_msgtype,
nexpaq	0:6c56fb4bc5f0	3498	major_ver, minor_ver, ssl->in_msglen ) );
nexpaq	0:6c56fb4bc5f0	3499
nexpaq	0:6c56fb4bc5f0	3500	/* Check record type */
nexpaq	0:6c56fb4bc5f0	3501	if( ssl->in_msgtype != MBEDTLS_SSL_MSG_HANDSHAKE &&
nexpaq	0:6c56fb4bc5f0	3502	ssl->in_msgtype != MBEDTLS_SSL_MSG_ALERT &&
nexpaq	0:6c56fb4bc5f0	3503	ssl->in_msgtype != MBEDTLS_SSL_MSG_CHANGE_CIPHER_SPEC &&
nexpaq	0:6c56fb4bc5f0	3504	ssl->in_msgtype != MBEDTLS_SSL_MSG_APPLICATION_DATA )
nexpaq	0:6c56fb4bc5f0	3505	{
nexpaq	0:6c56fb4bc5f0	3506	MBEDTLS_SSL_DEBUG_MSG( 1, ( "unknown record type" ) );
nexpaq	0:6c56fb4bc5f0	3507
nexpaq	0:6c56fb4bc5f0	3508	if( ( ret = mbedtls_ssl_send_alert_message( ssl,
nexpaq	0:6c56fb4bc5f0	3509	MBEDTLS_SSL_ALERT_LEVEL_FATAL,
nexpaq	0:6c56fb4bc5f0	3510	MBEDTLS_SSL_ALERT_MSG_UNEXPECTED_MESSAGE ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	3511	{
nexpaq	0:6c56fb4bc5f0	3512	return( ret );
nexpaq	0:6c56fb4bc5f0	3513	}
nexpaq	0:6c56fb4bc5f0	3514
nexpaq	0:6c56fb4bc5f0	3515	return( MBEDTLS_ERR_SSL_INVALID_RECORD );
nexpaq	0:6c56fb4bc5f0	3516	}
nexpaq	0:6c56fb4bc5f0	3517
nexpaq	0:6c56fb4bc5f0	3518	/* Check version */
nexpaq	0:6c56fb4bc5f0	3519	if( major_ver != ssl->major_ver )
nexpaq	0:6c56fb4bc5f0	3520	{
nexpaq	0:6c56fb4bc5f0	3521	MBEDTLS_SSL_DEBUG_MSG( 1, ( "major version mismatch" ) );
nexpaq	0:6c56fb4bc5f0	3522	return( MBEDTLS_ERR_SSL_INVALID_RECORD );
nexpaq	0:6c56fb4bc5f0	3523	}
nexpaq	0:6c56fb4bc5f0	3524
nexpaq	0:6c56fb4bc5f0	3525	if( minor_ver > ssl->conf->max_minor_ver )
nexpaq	0:6c56fb4bc5f0	3526	{
nexpaq	0:6c56fb4bc5f0	3527	MBEDTLS_SSL_DEBUG_MSG( 1, ( "minor version mismatch" ) );
nexpaq	0:6c56fb4bc5f0	3528	return( MBEDTLS_ERR_SSL_INVALID_RECORD );
nexpaq	0:6c56fb4bc5f0	3529	}
nexpaq	0:6c56fb4bc5f0	3530
nexpaq	0:6c56fb4bc5f0	3531	/* Check length against the size of our buffer */
nexpaq	0:6c56fb4bc5f0	3532	if( ssl->in_msglen > MBEDTLS_SSL_BUFFER_LEN
nexpaq	0:6c56fb4bc5f0	3533	- (size_t)( ssl->in_msg - ssl->in_buf ) )
nexpaq	0:6c56fb4bc5f0	3534	{
nexpaq	0:6c56fb4bc5f0	3535	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad message length" ) );
nexpaq	0:6c56fb4bc5f0	3536	return( MBEDTLS_ERR_SSL_INVALID_RECORD );
nexpaq	0:6c56fb4bc5f0	3537	}
nexpaq	0:6c56fb4bc5f0	3538
nexpaq	0:6c56fb4bc5f0	3539	/* Check length against bounds of the current transform and version */
nexpaq	0:6c56fb4bc5f0	3540	if( ssl->transform_in == NULL )
nexpaq	0:6c56fb4bc5f0	3541	{
nexpaq	0:6c56fb4bc5f0	3542	if( ssl->in_msglen < 1 \|\|
nexpaq	0:6c56fb4bc5f0	3543	ssl->in_msglen > MBEDTLS_SSL_MAX_CONTENT_LEN )
nexpaq	0:6c56fb4bc5f0	3544	{
nexpaq	0:6c56fb4bc5f0	3545	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad message length" ) );
nexpaq	0:6c56fb4bc5f0	3546	return( MBEDTLS_ERR_SSL_INVALID_RECORD );
nexpaq	0:6c56fb4bc5f0	3547	}
nexpaq	0:6c56fb4bc5f0	3548	}
nexpaq	0:6c56fb4bc5f0	3549	else
nexpaq	0:6c56fb4bc5f0	3550	{
nexpaq	0:6c56fb4bc5f0	3551	if( ssl->in_msglen < ssl->transform_in->minlen )
nexpaq	0:6c56fb4bc5f0	3552	{
nexpaq	0:6c56fb4bc5f0	3553	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad message length" ) );
nexpaq	0:6c56fb4bc5f0	3554	return( MBEDTLS_ERR_SSL_INVALID_RECORD );
nexpaq	0:6c56fb4bc5f0	3555	}
nexpaq	0:6c56fb4bc5f0	3556
nexpaq	0:6c56fb4bc5f0	3557	#if defined(MBEDTLS_SSL_PROTO_SSL3)
nexpaq	0:6c56fb4bc5f0	3558	if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 &&
nexpaq	0:6c56fb4bc5f0	3559	ssl->in_msglen > ssl->transform_in->minlen + MBEDTLS_SSL_MAX_CONTENT_LEN )
nexpaq	0:6c56fb4bc5f0	3560	{
nexpaq	0:6c56fb4bc5f0	3561	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad message length" ) );
nexpaq	0:6c56fb4bc5f0	3562	return( MBEDTLS_ERR_SSL_INVALID_RECORD );
nexpaq	0:6c56fb4bc5f0	3563	}
nexpaq	0:6c56fb4bc5f0	3564	#endif
nexpaq	0:6c56fb4bc5f0	3565	#if defined(MBEDTLS_SSL_PROTO_TLS1) \|\| defined(MBEDTLS_SSL_PROTO_TLS1_1) \|\| \
nexpaq	0:6c56fb4bc5f0	3566	defined(MBEDTLS_SSL_PROTO_TLS1_2)
nexpaq	0:6c56fb4bc5f0	3567	/*
nexpaq	0:6c56fb4bc5f0	3568	* TLS encrypted messages can have up to 256 bytes of padding
nexpaq	0:6c56fb4bc5f0	3569	*/
nexpaq	0:6c56fb4bc5f0	3570	if( ssl->minor_ver >= MBEDTLS_SSL_MINOR_VERSION_1 &&
nexpaq	0:6c56fb4bc5f0	3571	ssl->in_msglen > ssl->transform_in->minlen +
nexpaq	0:6c56fb4bc5f0	3572	MBEDTLS_SSL_MAX_CONTENT_LEN + 256 )
nexpaq	0:6c56fb4bc5f0	3573	{
nexpaq	0:6c56fb4bc5f0	3574	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad message length" ) );
nexpaq	0:6c56fb4bc5f0	3575	return( MBEDTLS_ERR_SSL_INVALID_RECORD );
nexpaq	0:6c56fb4bc5f0	3576	}
nexpaq	0:6c56fb4bc5f0	3577	#endif
nexpaq	0:6c56fb4bc5f0	3578	}
nexpaq	0:6c56fb4bc5f0	3579
nexpaq	0:6c56fb4bc5f0	3580	/*
nexpaq	0:6c56fb4bc5f0	3581	* DTLS-related tests done last, because most of them may result in
nexpaq	0:6c56fb4bc5f0	3582	* silently dropping the record (but not the whole datagram), and we only
nexpaq	0:6c56fb4bc5f0	3583	* want to consider that after ensuring that the "basic" fields (type,
nexpaq	0:6c56fb4bc5f0	3584	* version, length) are sane.
nexpaq	0:6c56fb4bc5f0	3585	*/
nexpaq	0:6c56fb4bc5f0	3586	#if defined(MBEDTLS_SSL_PROTO_DTLS)
nexpaq	0:6c56fb4bc5f0	3587	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
nexpaq	0:6c56fb4bc5f0	3588	{
nexpaq	0:6c56fb4bc5f0	3589	unsigned int rec_epoch = ( ssl->in_ctr[0] << 8 ) \| ssl->in_ctr[1];
nexpaq	0:6c56fb4bc5f0	3590
nexpaq	0:6c56fb4bc5f0	3591	/* Drop unexpected ChangeCipherSpec messages */
nexpaq	0:6c56fb4bc5f0	3592	if( ssl->in_msgtype == MBEDTLS_SSL_MSG_CHANGE_CIPHER_SPEC &&
nexpaq	0:6c56fb4bc5f0	3593	ssl->state != MBEDTLS_SSL_CLIENT_CHANGE_CIPHER_SPEC &&
nexpaq	0:6c56fb4bc5f0	3594	ssl->state != MBEDTLS_SSL_SERVER_CHANGE_CIPHER_SPEC )
nexpaq	0:6c56fb4bc5f0	3595	{
nexpaq	0:6c56fb4bc5f0	3596	MBEDTLS_SSL_DEBUG_MSG( 1, ( "dropping unexpected ChangeCipherSpec" ) );
nexpaq	0:6c56fb4bc5f0	3597	return( MBEDTLS_ERR_SSL_UNEXPECTED_RECORD );
nexpaq	0:6c56fb4bc5f0	3598	}
nexpaq	0:6c56fb4bc5f0	3599
nexpaq	0:6c56fb4bc5f0	3600	/* Drop unexpected ApplicationData records,
nexpaq	0:6c56fb4bc5f0	3601	* except at the beginning of renegotiations */
nexpaq	0:6c56fb4bc5f0	3602	if( ssl->in_msgtype == MBEDTLS_SSL_MSG_APPLICATION_DATA &&
nexpaq	0:6c56fb4bc5f0	3603	ssl->state != MBEDTLS_SSL_HANDSHAKE_OVER
nexpaq	0:6c56fb4bc5f0	3604	#if defined(MBEDTLS_SSL_RENEGOTIATION)
nexpaq	0:6c56fb4bc5f0	3605	&& ! ( ssl->renego_status == MBEDTLS_SSL_RENEGOTIATION_IN_PROGRESS &&
nexpaq	0:6c56fb4bc5f0	3606	ssl->state == MBEDTLS_SSL_SERVER_HELLO )
nexpaq	0:6c56fb4bc5f0	3607	#endif
nexpaq	0:6c56fb4bc5f0	3608	)
nexpaq	0:6c56fb4bc5f0	3609	{
nexpaq	0:6c56fb4bc5f0	3610	MBEDTLS_SSL_DEBUG_MSG( 1, ( "dropping unexpected ApplicationData" ) );
nexpaq	0:6c56fb4bc5f0	3611	return( MBEDTLS_ERR_SSL_UNEXPECTED_RECORD );
nexpaq	0:6c56fb4bc5f0	3612	}
nexpaq	0:6c56fb4bc5f0	3613
nexpaq	0:6c56fb4bc5f0	3614	/* Check epoch (and sequence number) with DTLS */
nexpaq	0:6c56fb4bc5f0	3615	if( rec_epoch != ssl->in_epoch )
nexpaq	0:6c56fb4bc5f0	3616	{
nexpaq	0:6c56fb4bc5f0	3617	MBEDTLS_SSL_DEBUG_MSG( 1, ( "record from another epoch: "
nexpaq	0:6c56fb4bc5f0	3618	"expected %d, received %d",
nexpaq	0:6c56fb4bc5f0	3619	ssl->in_epoch, rec_epoch ) );
nexpaq	0:6c56fb4bc5f0	3620
nexpaq	0:6c56fb4bc5f0	3621	#if defined(MBEDTLS_SSL_DTLS_CLIENT_PORT_REUSE) && defined(MBEDTLS_SSL_SRV_C)
nexpaq	0:6c56fb4bc5f0	3622	/*
nexpaq	0:6c56fb4bc5f0	3623	* Check for an epoch 0 ClientHello. We can't use in_msg here to
nexpaq	0:6c56fb4bc5f0	3624	* access the first byte of record content (handshake type), as we
nexpaq	0:6c56fb4bc5f0	3625	* have an active transform (possibly iv_len != 0), so use the
nexpaq	0:6c56fb4bc5f0	3626	* fact that the record header len is 13 instead.
nexpaq	0:6c56fb4bc5f0	3627	*/
nexpaq	0:6c56fb4bc5f0	3628	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER &&
nexpaq	0:6c56fb4bc5f0	3629	ssl->state == MBEDTLS_SSL_HANDSHAKE_OVER &&
nexpaq	0:6c56fb4bc5f0	3630	rec_epoch == 0 &&
nexpaq	0:6c56fb4bc5f0	3631	ssl->in_msgtype == MBEDTLS_SSL_MSG_HANDSHAKE &&
nexpaq	0:6c56fb4bc5f0	3632	ssl->in_left > 13 &&
nexpaq	0:6c56fb4bc5f0	3633	ssl->in_buf[13] == MBEDTLS_SSL_HS_CLIENT_HELLO )
nexpaq	0:6c56fb4bc5f0	3634	{
nexpaq	0:6c56fb4bc5f0	3635	MBEDTLS_SSL_DEBUG_MSG( 1, ( "possible client reconnect "
nexpaq	0:6c56fb4bc5f0	3636	"from the same port" ) );
nexpaq	0:6c56fb4bc5f0	3637	return( ssl_handle_possible_reconnect( ssl ) );
nexpaq	0:6c56fb4bc5f0	3638	}
nexpaq	0:6c56fb4bc5f0	3639	else
nexpaq	0:6c56fb4bc5f0	3640	#endif /* MBEDTLS_SSL_DTLS_CLIENT_PORT_REUSE && MBEDTLS_SSL_SRV_C */
nexpaq	0:6c56fb4bc5f0	3641	return( MBEDTLS_ERR_SSL_UNEXPECTED_RECORD );
nexpaq	0:6c56fb4bc5f0	3642	}
nexpaq	0:6c56fb4bc5f0	3643
nexpaq	0:6c56fb4bc5f0	3644	#if defined(MBEDTLS_SSL_DTLS_ANTI_REPLAY)
nexpaq	0:6c56fb4bc5f0	3645	/* Replay detection only works for the current epoch */
nexpaq	0:6c56fb4bc5f0	3646	if( rec_epoch == ssl->in_epoch &&
nexpaq	0:6c56fb4bc5f0	3647	mbedtls_ssl_dtls_replay_check( ssl ) != 0 )
nexpaq	0:6c56fb4bc5f0	3648	{
nexpaq	0:6c56fb4bc5f0	3649	MBEDTLS_SSL_DEBUG_MSG( 1, ( "replayed record" ) );
nexpaq	0:6c56fb4bc5f0	3650	return( MBEDTLS_ERR_SSL_UNEXPECTED_RECORD );
nexpaq	0:6c56fb4bc5f0	3651	}
nexpaq	0:6c56fb4bc5f0	3652	#endif
nexpaq	0:6c56fb4bc5f0	3653	}
nexpaq	0:6c56fb4bc5f0	3654	#endif /* MBEDTLS_SSL_PROTO_DTLS */
nexpaq	0:6c56fb4bc5f0	3655
nexpaq	0:6c56fb4bc5f0	3656	return( 0 );
nexpaq	0:6c56fb4bc5f0	3657	}
nexpaq	0:6c56fb4bc5f0	3658
nexpaq	0:6c56fb4bc5f0	3659	/*
nexpaq	0:6c56fb4bc5f0	3660	* If applicable, decrypt (and decompress) record content
nexpaq	0:6c56fb4bc5f0	3661	*/
nexpaq	0:6c56fb4bc5f0	3662	static int ssl_prepare_record_content( mbedtls_ssl_context *ssl )
nexpaq	0:6c56fb4bc5f0	3663	{
nexpaq	0:6c56fb4bc5f0	3664	int ret, done = 0;
nexpaq	0:6c56fb4bc5f0	3665
nexpaq	0:6c56fb4bc5f0	3666	MBEDTLS_SSL_DEBUG_BUF( 4, "input record from network",
nexpaq	0:6c56fb4bc5f0	3667	ssl->in_hdr, mbedtls_ssl_hdr_len( ssl ) + ssl->in_msglen );
nexpaq	0:6c56fb4bc5f0	3668
nexpaq	0:6c56fb4bc5f0	3669	#if defined(MBEDTLS_SSL_HW_RECORD_ACCEL)
nexpaq	0:6c56fb4bc5f0	3670	if( mbedtls_ssl_hw_record_read != NULL )
nexpaq	0:6c56fb4bc5f0	3671	{
nexpaq	0:6c56fb4bc5f0	3672	MBEDTLS_SSL_DEBUG_MSG( 2, ( "going for mbedtls_ssl_hw_record_read()" ) );
nexpaq	0:6c56fb4bc5f0	3673
nexpaq	0:6c56fb4bc5f0	3674	ret = mbedtls_ssl_hw_record_read( ssl );
nexpaq	0:6c56fb4bc5f0	3675	if( ret != 0 && ret != MBEDTLS_ERR_SSL_HW_ACCEL_FALLTHROUGH )
nexpaq	0:6c56fb4bc5f0	3676	{
nexpaq	0:6c56fb4bc5f0	3677	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_hw_record_read", ret );
nexpaq	0:6c56fb4bc5f0	3678	return( MBEDTLS_ERR_SSL_HW_ACCEL_FAILED );
nexpaq	0:6c56fb4bc5f0	3679	}
nexpaq	0:6c56fb4bc5f0	3680
nexpaq	0:6c56fb4bc5f0	3681	if( ret == 0 )
nexpaq	0:6c56fb4bc5f0	3682	done = 1;
nexpaq	0:6c56fb4bc5f0	3683	}
nexpaq	0:6c56fb4bc5f0	3684	#endif /* MBEDTLS_SSL_HW_RECORD_ACCEL */
nexpaq	0:6c56fb4bc5f0	3685	if( !done && ssl->transform_in != NULL )
nexpaq	0:6c56fb4bc5f0	3686	{
nexpaq	0:6c56fb4bc5f0	3687	if( ( ret = ssl_decrypt_buf( ssl ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	3688	{
nexpaq	0:6c56fb4bc5f0	3689	MBEDTLS_SSL_DEBUG_RET( 1, "ssl_decrypt_buf", ret );
nexpaq	0:6c56fb4bc5f0	3690	return( ret );
nexpaq	0:6c56fb4bc5f0	3691	}
nexpaq	0:6c56fb4bc5f0	3692
nexpaq	0:6c56fb4bc5f0	3693	MBEDTLS_SSL_DEBUG_BUF( 4, "input payload after decrypt",
nexpaq	0:6c56fb4bc5f0	3694	ssl->in_msg, ssl->in_msglen );
nexpaq	0:6c56fb4bc5f0	3695
nexpaq	0:6c56fb4bc5f0	3696	if( ssl->in_msglen > MBEDTLS_SSL_MAX_CONTENT_LEN )
nexpaq	0:6c56fb4bc5f0	3697	{
nexpaq	0:6c56fb4bc5f0	3698	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad message length" ) );
nexpaq	0:6c56fb4bc5f0	3699	return( MBEDTLS_ERR_SSL_INVALID_RECORD );
nexpaq	0:6c56fb4bc5f0	3700	}
nexpaq	0:6c56fb4bc5f0	3701	}
nexpaq	0:6c56fb4bc5f0	3702
nexpaq	0:6c56fb4bc5f0	3703	#if defined(MBEDTLS_ZLIB_SUPPORT)
nexpaq	0:6c56fb4bc5f0	3704	if( ssl->transform_in != NULL &&
nexpaq	0:6c56fb4bc5f0	3705	ssl->session_in->compression == MBEDTLS_SSL_COMPRESS_DEFLATE )
nexpaq	0:6c56fb4bc5f0	3706	{
nexpaq	0:6c56fb4bc5f0	3707	if( ( ret = ssl_decompress_buf( ssl ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	3708	{
nexpaq	0:6c56fb4bc5f0	3709	MBEDTLS_SSL_DEBUG_RET( 1, "ssl_decompress_buf", ret );
nexpaq	0:6c56fb4bc5f0	3710	return( ret );
nexpaq	0:6c56fb4bc5f0	3711	}
nexpaq	0:6c56fb4bc5f0	3712	}
nexpaq	0:6c56fb4bc5f0	3713	#endif /* MBEDTLS_ZLIB_SUPPORT */
nexpaq	0:6c56fb4bc5f0	3714
nexpaq	0:6c56fb4bc5f0	3715	#if defined(MBEDTLS_SSL_DTLS_ANTI_REPLAY)
nexpaq	0:6c56fb4bc5f0	3716	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
nexpaq	0:6c56fb4bc5f0	3717	{
nexpaq	0:6c56fb4bc5f0	3718	mbedtls_ssl_dtls_replay_update( ssl );
nexpaq	0:6c56fb4bc5f0	3719	}
nexpaq	0:6c56fb4bc5f0	3720	#endif
nexpaq	0:6c56fb4bc5f0	3721
nexpaq	0:6c56fb4bc5f0	3722	return( 0 );
nexpaq	0:6c56fb4bc5f0	3723	}
nexpaq	0:6c56fb4bc5f0	3724
nexpaq	0:6c56fb4bc5f0	3725	static void ssl_handshake_wrapup_free_hs_transform( mbedtls_ssl_context *ssl );
nexpaq	0:6c56fb4bc5f0	3726
nexpaq	0:6c56fb4bc5f0	3727	/*
nexpaq	0:6c56fb4bc5f0	3728	* Read a record.
nexpaq	0:6c56fb4bc5f0	3729	*
nexpaq	0:6c56fb4bc5f0	3730	* Silently ignore non-fatal alert (and for DTLS, invalid records as well,
nexpaq	0:6c56fb4bc5f0	3731	* RFC 6347 4.1.2.7) and continue reading until a valid record is found.
nexpaq	0:6c56fb4bc5f0	3732	*
nexpaq	0:6c56fb4bc5f0	3733	*/
nexpaq	0:6c56fb4bc5f0	3734	int mbedtls_ssl_read_record( mbedtls_ssl_context *ssl )
nexpaq	0:6c56fb4bc5f0	3735	{
nexpaq	0:6c56fb4bc5f0	3736	int ret;
nexpaq	0:6c56fb4bc5f0	3737
nexpaq	0:6c56fb4bc5f0	3738	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> read record" ) );
nexpaq	0:6c56fb4bc5f0	3739
nexpaq	0:6c56fb4bc5f0	3740	if( ssl->in_hslen != 0 && ssl->in_hslen < ssl->in_msglen )
nexpaq	0:6c56fb4bc5f0	3741	{
nexpaq	0:6c56fb4bc5f0	3742	/*
nexpaq	0:6c56fb4bc5f0	3743	* Get next Handshake message in the current record
nexpaq	0:6c56fb4bc5f0	3744	*/
nexpaq	0:6c56fb4bc5f0	3745	ssl->in_msglen -= ssl->in_hslen;
nexpaq	0:6c56fb4bc5f0	3746
nexpaq	0:6c56fb4bc5f0	3747	memmove( ssl->in_msg, ssl->in_msg + ssl->in_hslen,
nexpaq	0:6c56fb4bc5f0	3748	ssl->in_msglen );
nexpaq	0:6c56fb4bc5f0	3749
nexpaq	0:6c56fb4bc5f0	3750	MBEDTLS_SSL_DEBUG_BUF( 4, "remaining content in record",
nexpaq	0:6c56fb4bc5f0	3751	ssl->in_msg, ssl->in_msglen );
nexpaq	0:6c56fb4bc5f0	3752
nexpaq	0:6c56fb4bc5f0	3753	if( ( ret = ssl_prepare_handshake_record( ssl ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	3754	return( ret );
nexpaq	0:6c56fb4bc5f0	3755
nexpaq	0:6c56fb4bc5f0	3756	return( 0 );
nexpaq	0:6c56fb4bc5f0	3757	}
nexpaq	0:6c56fb4bc5f0	3758
nexpaq	0:6c56fb4bc5f0	3759	ssl->in_hslen = 0;
nexpaq	0:6c56fb4bc5f0	3760
nexpaq	0:6c56fb4bc5f0	3761	/*
nexpaq	0:6c56fb4bc5f0	3762	* Read the record header and parse it
nexpaq	0:6c56fb4bc5f0	3763	*/
nexpaq	0:6c56fb4bc5f0	3764	read_record_header:
nexpaq	0:6c56fb4bc5f0	3765	if( ( ret = mbedtls_ssl_fetch_input( ssl, mbedtls_ssl_hdr_len( ssl ) ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	3766	{
nexpaq	0:6c56fb4bc5f0	3767	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_fetch_input", ret );
nexpaq	0:6c56fb4bc5f0	3768	return( ret );
nexpaq	0:6c56fb4bc5f0	3769	}
nexpaq	0:6c56fb4bc5f0	3770
nexpaq	0:6c56fb4bc5f0	3771	if( ( ret = ssl_parse_record_header( ssl ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	3772	{
nexpaq	0:6c56fb4bc5f0	3773	#if defined(MBEDTLS_SSL_PROTO_DTLS)
nexpaq	0:6c56fb4bc5f0	3774	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM &&
nexpaq	0:6c56fb4bc5f0	3775	ret != MBEDTLS_ERR_SSL_CLIENT_RECONNECT )
nexpaq	0:6c56fb4bc5f0	3776	{
nexpaq	0:6c56fb4bc5f0	3777	if( ret == MBEDTLS_ERR_SSL_UNEXPECTED_RECORD )
nexpaq	0:6c56fb4bc5f0	3778	{
nexpaq	0:6c56fb4bc5f0	3779	/* Skip unexpected record (but not whole datagram) */
nexpaq	0:6c56fb4bc5f0	3780	ssl->next_record_offset = ssl->in_msglen
nexpaq	0:6c56fb4bc5f0	3781	+ mbedtls_ssl_hdr_len( ssl );
nexpaq	0:6c56fb4bc5f0	3782
nexpaq	0:6c56fb4bc5f0	3783	MBEDTLS_SSL_DEBUG_MSG( 1, ( "discarding unexpected record "
nexpaq	0:6c56fb4bc5f0	3784	"(header)" ) );
nexpaq	0:6c56fb4bc5f0	3785	}
nexpaq	0:6c56fb4bc5f0	3786	else
nexpaq	0:6c56fb4bc5f0	3787	{
nexpaq	0:6c56fb4bc5f0	3788	/* Skip invalid record and the rest of the datagram */
nexpaq	0:6c56fb4bc5f0	3789	ssl->next_record_offset = 0;
nexpaq	0:6c56fb4bc5f0	3790	ssl->in_left = 0;
nexpaq	0:6c56fb4bc5f0	3791
nexpaq	0:6c56fb4bc5f0	3792	MBEDTLS_SSL_DEBUG_MSG( 1, ( "discarding invalid record "
nexpaq	0:6c56fb4bc5f0	3793	"(header)" ) );
nexpaq	0:6c56fb4bc5f0	3794	}
nexpaq	0:6c56fb4bc5f0	3795
nexpaq	0:6c56fb4bc5f0	3796	/* Get next record */
nexpaq	0:6c56fb4bc5f0	3797	goto read_record_header;
nexpaq	0:6c56fb4bc5f0	3798	}
nexpaq	0:6c56fb4bc5f0	3799	#endif
nexpaq	0:6c56fb4bc5f0	3800	return( ret );
nexpaq	0:6c56fb4bc5f0	3801	}
nexpaq	0:6c56fb4bc5f0	3802
nexpaq	0:6c56fb4bc5f0	3803	/*
nexpaq	0:6c56fb4bc5f0	3804	* Read and optionally decrypt the message contents
nexpaq	0:6c56fb4bc5f0	3805	*/
nexpaq	0:6c56fb4bc5f0	3806	if( ( ret = mbedtls_ssl_fetch_input( ssl,
nexpaq	0:6c56fb4bc5f0	3807	mbedtls_ssl_hdr_len( ssl ) + ssl->in_msglen ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	3808	{
nexpaq	0:6c56fb4bc5f0	3809	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_fetch_input", ret );
nexpaq	0:6c56fb4bc5f0	3810	return( ret );
nexpaq	0:6c56fb4bc5f0	3811	}
nexpaq	0:6c56fb4bc5f0	3812
nexpaq	0:6c56fb4bc5f0	3813	/* Done reading this record, get ready for the next one */
nexpaq	0:6c56fb4bc5f0	3814	#if defined(MBEDTLS_SSL_PROTO_DTLS)
nexpaq	0:6c56fb4bc5f0	3815	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
nexpaq	0:6c56fb4bc5f0	3816	ssl->next_record_offset = ssl->in_msglen + mbedtls_ssl_hdr_len( ssl );
nexpaq	0:6c56fb4bc5f0	3817	else
nexpaq	0:6c56fb4bc5f0	3818	#endif
nexpaq	0:6c56fb4bc5f0	3819	ssl->in_left = 0;
nexpaq	0:6c56fb4bc5f0	3820
nexpaq	0:6c56fb4bc5f0	3821	if( ( ret = ssl_prepare_record_content( ssl ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	3822	{
nexpaq	0:6c56fb4bc5f0	3823	#if defined(MBEDTLS_SSL_PROTO_DTLS)
nexpaq	0:6c56fb4bc5f0	3824	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
nexpaq	0:6c56fb4bc5f0	3825	{
nexpaq	0:6c56fb4bc5f0	3826	/* Silently discard invalid records */
nexpaq	0:6c56fb4bc5f0	3827	if( ret == MBEDTLS_ERR_SSL_INVALID_RECORD \|\|
nexpaq	0:6c56fb4bc5f0	3828	ret == MBEDTLS_ERR_SSL_INVALID_MAC )
nexpaq	0:6c56fb4bc5f0	3829	{
nexpaq	0:6c56fb4bc5f0	3830	/* Except when waiting for Finished as a bad mac here
nexpaq	0:6c56fb4bc5f0	3831	* probably means something went wrong in the handshake
nexpaq	0:6c56fb4bc5f0	3832	* (eg wrong psk used, mitm downgrade attempt, etc.) */
nexpaq	0:6c56fb4bc5f0	3833	if( ssl->state == MBEDTLS_SSL_CLIENT_FINISHED \|\|
nexpaq	0:6c56fb4bc5f0	3834	ssl->state == MBEDTLS_SSL_SERVER_FINISHED )
nexpaq	0:6c56fb4bc5f0	3835	{
nexpaq	0:6c56fb4bc5f0	3836	#if defined(MBEDTLS_SSL_ALL_ALERT_MESSAGES)
nexpaq	0:6c56fb4bc5f0	3837	if( ret == MBEDTLS_ERR_SSL_INVALID_MAC )
nexpaq	0:6c56fb4bc5f0	3838	{
nexpaq	0:6c56fb4bc5f0	3839	mbedtls_ssl_send_alert_message( ssl,
nexpaq	0:6c56fb4bc5f0	3840	MBEDTLS_SSL_ALERT_LEVEL_FATAL,
nexpaq	0:6c56fb4bc5f0	3841	MBEDTLS_SSL_ALERT_MSG_BAD_RECORD_MAC );
nexpaq	0:6c56fb4bc5f0	3842	}
nexpaq	0:6c56fb4bc5f0	3843	#endif
nexpaq	0:6c56fb4bc5f0	3844	return( ret );
nexpaq	0:6c56fb4bc5f0	3845	}
nexpaq	0:6c56fb4bc5f0	3846
nexpaq	0:6c56fb4bc5f0	3847	#if defined(MBEDTLS_SSL_DTLS_BADMAC_LIMIT)
nexpaq	0:6c56fb4bc5f0	3848	if( ssl->conf->badmac_limit != 0 &&
nexpaq	0:6c56fb4bc5f0	3849	++ssl->badmac_seen >= ssl->conf->badmac_limit )
nexpaq	0:6c56fb4bc5f0	3850	{
nexpaq	0:6c56fb4bc5f0	3851	MBEDTLS_SSL_DEBUG_MSG( 1, ( "too many records with bad MAC" ) );
nexpaq	0:6c56fb4bc5f0	3852	return( MBEDTLS_ERR_SSL_INVALID_MAC );
nexpaq	0:6c56fb4bc5f0	3853	}
nexpaq	0:6c56fb4bc5f0	3854	#endif
nexpaq	0:6c56fb4bc5f0	3855
nexpaq	0:6c56fb4bc5f0	3856	MBEDTLS_SSL_DEBUG_MSG( 1, ( "discarding invalid record (mac)" ) );
nexpaq	0:6c56fb4bc5f0	3857	goto read_record_header;
nexpaq	0:6c56fb4bc5f0	3858	}
nexpaq	0:6c56fb4bc5f0	3859
nexpaq	0:6c56fb4bc5f0	3860	return( ret );
nexpaq	0:6c56fb4bc5f0	3861	}
nexpaq	0:6c56fb4bc5f0	3862	else
nexpaq	0:6c56fb4bc5f0	3863	#endif
nexpaq	0:6c56fb4bc5f0	3864	{
nexpaq	0:6c56fb4bc5f0	3865	/* Error out (and send alert) on invalid records */
nexpaq	0:6c56fb4bc5f0	3866	#if defined(MBEDTLS_SSL_ALL_ALERT_MESSAGES)
nexpaq	0:6c56fb4bc5f0	3867	if( ret == MBEDTLS_ERR_SSL_INVALID_MAC )
nexpaq	0:6c56fb4bc5f0	3868	{
nexpaq	0:6c56fb4bc5f0	3869	mbedtls_ssl_send_alert_message( ssl,
nexpaq	0:6c56fb4bc5f0	3870	MBEDTLS_SSL_ALERT_LEVEL_FATAL,
nexpaq	0:6c56fb4bc5f0	3871	MBEDTLS_SSL_ALERT_MSG_BAD_RECORD_MAC );
nexpaq	0:6c56fb4bc5f0	3872	}
nexpaq	0:6c56fb4bc5f0	3873	#endif
nexpaq	0:6c56fb4bc5f0	3874	return( ret );
nexpaq	0:6c56fb4bc5f0	3875	}
nexpaq	0:6c56fb4bc5f0	3876	}
nexpaq	0:6c56fb4bc5f0	3877
nexpaq	0:6c56fb4bc5f0	3878	/*
nexpaq	0:6c56fb4bc5f0	3879	* When we sent the last flight of the handshake, we MUST respond to a
nexpaq	0:6c56fb4bc5f0	3880	* retransmit of the peer's previous flight with a retransmit. (In
nexpaq	0:6c56fb4bc5f0	3881	* practice, only the Finished message will make it, other messages
nexpaq	0:6c56fb4bc5f0	3882	* including CCS use the old transform so they're dropped as invalid.)
nexpaq	0:6c56fb4bc5f0	3883	*
nexpaq	0:6c56fb4bc5f0	3884	* If the record we received is not a handshake message, however, it
nexpaq	0:6c56fb4bc5f0	3885	* means the peer received our last flight so we can clean up
nexpaq	0:6c56fb4bc5f0	3886	* handshake info.
nexpaq	0:6c56fb4bc5f0	3887	*
nexpaq	0:6c56fb4bc5f0	3888	* This check needs to be done before prepare_handshake() due to an edge
nexpaq	0:6c56fb4bc5f0	3889	* case: if the client immediately requests renegotiation, this
nexpaq	0:6c56fb4bc5f0	3890	* finishes the current handshake first, avoiding the new ClientHello
nexpaq	0:6c56fb4bc5f0	3891	* being mistaken for an ancient message in the current handshake.
nexpaq	0:6c56fb4bc5f0	3892	*/
nexpaq	0:6c56fb4bc5f0	3893	#if defined(MBEDTLS_SSL_PROTO_DTLS)
nexpaq	0:6c56fb4bc5f0	3894	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM &&
nexpaq	0:6c56fb4bc5f0	3895	ssl->handshake != NULL &&
nexpaq	0:6c56fb4bc5f0	3896	ssl->state == MBEDTLS_SSL_HANDSHAKE_OVER )
nexpaq	0:6c56fb4bc5f0	3897	{
nexpaq	0:6c56fb4bc5f0	3898	if( ssl->in_msgtype == MBEDTLS_SSL_MSG_HANDSHAKE &&
nexpaq	0:6c56fb4bc5f0	3899	ssl->in_msg[0] == MBEDTLS_SSL_HS_FINISHED )
nexpaq	0:6c56fb4bc5f0	3900	{
nexpaq	0:6c56fb4bc5f0	3901	MBEDTLS_SSL_DEBUG_MSG( 2, ( "received retransmit of last flight" ) );
nexpaq	0:6c56fb4bc5f0	3902
nexpaq	0:6c56fb4bc5f0	3903	if( ( ret = mbedtls_ssl_resend( ssl ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	3904	{
nexpaq	0:6c56fb4bc5f0	3905	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_resend", ret );
nexpaq	0:6c56fb4bc5f0	3906	return( ret );
nexpaq	0:6c56fb4bc5f0	3907	}
nexpaq	0:6c56fb4bc5f0	3908
nexpaq	0:6c56fb4bc5f0	3909	return( MBEDTLS_ERR_SSL_WANT_READ );
nexpaq	0:6c56fb4bc5f0	3910	}
nexpaq	0:6c56fb4bc5f0	3911	else
nexpaq	0:6c56fb4bc5f0	3912	{
nexpaq	0:6c56fb4bc5f0	3913	ssl_handshake_wrapup_free_hs_transform( ssl );
nexpaq	0:6c56fb4bc5f0	3914	}
nexpaq	0:6c56fb4bc5f0	3915	}
nexpaq	0:6c56fb4bc5f0	3916	#endif
nexpaq	0:6c56fb4bc5f0	3917
nexpaq	0:6c56fb4bc5f0	3918	/*
nexpaq	0:6c56fb4bc5f0	3919	* Handle particular types of records
nexpaq	0:6c56fb4bc5f0	3920	*/
nexpaq	0:6c56fb4bc5f0	3921	if( ssl->in_msgtype == MBEDTLS_SSL_MSG_HANDSHAKE )
nexpaq	0:6c56fb4bc5f0	3922	{
nexpaq	0:6c56fb4bc5f0	3923	if( ( ret = ssl_prepare_handshake_record( ssl ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	3924	return( ret );
nexpaq	0:6c56fb4bc5f0	3925	}
nexpaq	0:6c56fb4bc5f0	3926
nexpaq	0:6c56fb4bc5f0	3927	if( ssl->in_msgtype == MBEDTLS_SSL_MSG_ALERT )
nexpaq	0:6c56fb4bc5f0	3928	{
nexpaq	0:6c56fb4bc5f0	3929	MBEDTLS_SSL_DEBUG_MSG( 2, ( "got an alert message, type: [%d:%d]",
nexpaq	0:6c56fb4bc5f0	3930	ssl->in_msg[0], ssl->in_msg[1] ) );
nexpaq	0:6c56fb4bc5f0	3931
nexpaq	0:6c56fb4bc5f0	3932	/*
nexpaq	0:6c56fb4bc5f0	3933	* Ignore non-fatal alerts, except close_notify and no_renegotiation
nexpaq	0:6c56fb4bc5f0	3934	*/
nexpaq	0:6c56fb4bc5f0	3935	if( ssl->in_msg[0] == MBEDTLS_SSL_ALERT_LEVEL_FATAL )
nexpaq	0:6c56fb4bc5f0	3936	{
nexpaq	0:6c56fb4bc5f0	3937	MBEDTLS_SSL_DEBUG_MSG( 1, ( "is a fatal alert message (msg %d)",
nexpaq	0:6c56fb4bc5f0	3938	ssl->in_msg[1] ) );
nexpaq	0:6c56fb4bc5f0	3939	return( MBEDTLS_ERR_SSL_FATAL_ALERT_MESSAGE );
nexpaq	0:6c56fb4bc5f0	3940	}
nexpaq	0:6c56fb4bc5f0	3941
nexpaq	0:6c56fb4bc5f0	3942	if( ssl->in_msg[0] == MBEDTLS_SSL_ALERT_LEVEL_WARNING &&
nexpaq	0:6c56fb4bc5f0	3943	ssl->in_msg[1] == MBEDTLS_SSL_ALERT_MSG_CLOSE_NOTIFY )
nexpaq	0:6c56fb4bc5f0	3944	{
nexpaq	0:6c56fb4bc5f0	3945	MBEDTLS_SSL_DEBUG_MSG( 2, ( "is a close notify message" ) );
nexpaq	0:6c56fb4bc5f0	3946	return( MBEDTLS_ERR_SSL_PEER_CLOSE_NOTIFY );
nexpaq	0:6c56fb4bc5f0	3947	}
nexpaq	0:6c56fb4bc5f0	3948
nexpaq	0:6c56fb4bc5f0	3949	#if defined(MBEDTLS_SSL_RENEGOTIATION_ENABLED)
nexpaq	0:6c56fb4bc5f0	3950	if( ssl->in_msg[0] == MBEDTLS_SSL_ALERT_LEVEL_WARNING &&
nexpaq	0:6c56fb4bc5f0	3951	ssl->in_msg[1] == MBEDTLS_SSL_ALERT_MSG_NO_RENEGOTIATION )
nexpaq	0:6c56fb4bc5f0	3952	{
nexpaq	0:6c56fb4bc5f0	3953	MBEDTLS_SSL_DEBUG_MSG( 2, ( "is a SSLv3 no_cert" ) );
nexpaq	0:6c56fb4bc5f0	3954	/* Will be handled when trying to parse ServerHello */
nexpaq	0:6c56fb4bc5f0	3955	return( 0 );
nexpaq	0:6c56fb4bc5f0	3956	}
nexpaq	0:6c56fb4bc5f0	3957	#endif
nexpaq	0:6c56fb4bc5f0	3958
nexpaq	0:6c56fb4bc5f0	3959	#if defined(MBEDTLS_SSL_PROTO_SSL3) && defined(MBEDTLS_SSL_SRV_C)
nexpaq	0:6c56fb4bc5f0	3960	if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 &&
nexpaq	0:6c56fb4bc5f0	3961	ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER &&
nexpaq	0:6c56fb4bc5f0	3962	ssl->in_msg[0] == MBEDTLS_SSL_ALERT_LEVEL_WARNING &&
nexpaq	0:6c56fb4bc5f0	3963	ssl->in_msg[1] == MBEDTLS_SSL_ALERT_MSG_NO_CERT )
nexpaq	0:6c56fb4bc5f0	3964	{
nexpaq	0:6c56fb4bc5f0	3965	MBEDTLS_SSL_DEBUG_MSG( 2, ( "is a SSLv3 no_cert" ) );
nexpaq	0:6c56fb4bc5f0	3966	/* Will be handled in mbedtls_ssl_parse_certificate() */
nexpaq	0:6c56fb4bc5f0	3967	return( 0 );
nexpaq	0:6c56fb4bc5f0	3968	}
nexpaq	0:6c56fb4bc5f0	3969	#endif /* MBEDTLS_SSL_PROTO_SSL3 && MBEDTLS_SSL_SRV_C */
nexpaq	0:6c56fb4bc5f0	3970
nexpaq	0:6c56fb4bc5f0	3971	/* Silently ignore: fetch new message */
nexpaq	0:6c56fb4bc5f0	3972	goto read_record_header;
nexpaq	0:6c56fb4bc5f0	3973	}
nexpaq	0:6c56fb4bc5f0	3974
nexpaq	0:6c56fb4bc5f0	3975	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= read record" ) );
nexpaq	0:6c56fb4bc5f0	3976
nexpaq	0:6c56fb4bc5f0	3977	return( 0 );
nexpaq	0:6c56fb4bc5f0	3978	}
nexpaq	0:6c56fb4bc5f0	3979
nexpaq	0:6c56fb4bc5f0	3980	int mbedtls_ssl_send_fatal_handshake_failure( mbedtls_ssl_context *ssl )
nexpaq	0:6c56fb4bc5f0	3981	{
nexpaq	0:6c56fb4bc5f0	3982	int ret;
nexpaq	0:6c56fb4bc5f0	3983
nexpaq	0:6c56fb4bc5f0	3984	if( ( ret = mbedtls_ssl_send_alert_message( ssl,
nexpaq	0:6c56fb4bc5f0	3985	MBEDTLS_SSL_ALERT_LEVEL_FATAL,
nexpaq	0:6c56fb4bc5f0	3986	MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	3987	{
nexpaq	0:6c56fb4bc5f0	3988	return( ret );
nexpaq	0:6c56fb4bc5f0	3989	}
nexpaq	0:6c56fb4bc5f0	3990
nexpaq	0:6c56fb4bc5f0	3991	return( 0 );
nexpaq	0:6c56fb4bc5f0	3992	}
nexpaq	0:6c56fb4bc5f0	3993
nexpaq	0:6c56fb4bc5f0	3994	int mbedtls_ssl_send_alert_message( mbedtls_ssl_context *ssl,
nexpaq	0:6c56fb4bc5f0	3995	unsigned char level,
nexpaq	0:6c56fb4bc5f0	3996	unsigned char message )
nexpaq	0:6c56fb4bc5f0	3997	{
nexpaq	0:6c56fb4bc5f0	3998	int ret;
nexpaq	0:6c56fb4bc5f0	3999
nexpaq	0:6c56fb4bc5f0	4000	if( ssl == NULL \|\| ssl->conf == NULL )
nexpaq	0:6c56fb4bc5f0	4001	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
nexpaq	0:6c56fb4bc5f0	4002
nexpaq	0:6c56fb4bc5f0	4003	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> send alert message" ) );
nexpaq	0:6c56fb4bc5f0	4004
nexpaq	0:6c56fb4bc5f0	4005	ssl->out_msgtype = MBEDTLS_SSL_MSG_ALERT;
nexpaq	0:6c56fb4bc5f0	4006	ssl->out_msglen = 2;
nexpaq	0:6c56fb4bc5f0	4007	ssl->out_msg[0] = level;
nexpaq	0:6c56fb4bc5f0	4008	ssl->out_msg[1] = message;
nexpaq	0:6c56fb4bc5f0	4009
nexpaq	0:6c56fb4bc5f0	4010	if( ( ret = mbedtls_ssl_write_record( ssl ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	4011	{
nexpaq	0:6c56fb4bc5f0	4012	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_write_record", ret );
nexpaq	0:6c56fb4bc5f0	4013	return( ret );
nexpaq	0:6c56fb4bc5f0	4014	}
nexpaq	0:6c56fb4bc5f0	4015
nexpaq	0:6c56fb4bc5f0	4016	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= send alert message" ) );
nexpaq	0:6c56fb4bc5f0	4017
nexpaq	0:6c56fb4bc5f0	4018	return( 0 );
nexpaq	0:6c56fb4bc5f0	4019	}
nexpaq	0:6c56fb4bc5f0	4020
nexpaq	0:6c56fb4bc5f0	4021	/*
nexpaq	0:6c56fb4bc5f0	4022	* Handshake functions
nexpaq	0:6c56fb4bc5f0	4023	*/
nexpaq	0:6c56fb4bc5f0	4024	#if !defined(MBEDTLS_KEY_EXCHANGE_RSA_ENABLED) && \
nexpaq	0:6c56fb4bc5f0	4025	!defined(MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED) && \
nexpaq	0:6c56fb4bc5f0	4026	!defined(MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED) && \
nexpaq	0:6c56fb4bc5f0	4027	!defined(MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED) && \
nexpaq	0:6c56fb4bc5f0	4028	!defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED) && \
nexpaq	0:6c56fb4bc5f0	4029	!defined(MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED) && \
nexpaq	0:6c56fb4bc5f0	4030	!defined(MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED)
nexpaq	0:6c56fb4bc5f0	4031	int mbedtls_ssl_write_certificate( mbedtls_ssl_context *ssl )
nexpaq	0:6c56fb4bc5f0	4032	{
nexpaq	0:6c56fb4bc5f0	4033	const mbedtls_ssl_ciphersuite_t *ciphersuite_info = ssl->transform_negotiate->ciphersuite_info;
nexpaq	0:6c56fb4bc5f0	4034
nexpaq	0:6c56fb4bc5f0	4035	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write certificate" ) );
nexpaq	0:6c56fb4bc5f0	4036
nexpaq	0:6c56fb4bc5f0	4037	if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_PSK \|\|
nexpaq	0:6c56fb4bc5f0	4038	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_DHE_PSK \|\|
nexpaq	0:6c56fb4bc5f0	4039	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_PSK \|\|
nexpaq	0:6c56fb4bc5f0	4040	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECJPAKE )
nexpaq	0:6c56fb4bc5f0	4041	{
nexpaq	0:6c56fb4bc5f0	4042	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip write certificate" ) );
nexpaq	0:6c56fb4bc5f0	4043	ssl->state++;
nexpaq	0:6c56fb4bc5f0	4044	return( 0 );
nexpaq	0:6c56fb4bc5f0	4045	}
nexpaq	0:6c56fb4bc5f0	4046
nexpaq	0:6c56fb4bc5f0	4047	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
nexpaq	0:6c56fb4bc5f0	4048	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
nexpaq	0:6c56fb4bc5f0	4049	}
nexpaq	0:6c56fb4bc5f0	4050
nexpaq	0:6c56fb4bc5f0	4051	int mbedtls_ssl_parse_certificate( mbedtls_ssl_context *ssl )
nexpaq	0:6c56fb4bc5f0	4052	{
nexpaq	0:6c56fb4bc5f0	4053	const mbedtls_ssl_ciphersuite_t *ciphersuite_info = ssl->transform_negotiate->ciphersuite_info;
nexpaq	0:6c56fb4bc5f0	4054
nexpaq	0:6c56fb4bc5f0	4055	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> parse certificate" ) );
nexpaq	0:6c56fb4bc5f0	4056
nexpaq	0:6c56fb4bc5f0	4057	if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_PSK \|\|
nexpaq	0:6c56fb4bc5f0	4058	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_DHE_PSK \|\|
nexpaq	0:6c56fb4bc5f0	4059	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_PSK \|\|
nexpaq	0:6c56fb4bc5f0	4060	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECJPAKE )
nexpaq	0:6c56fb4bc5f0	4061	{
nexpaq	0:6c56fb4bc5f0	4062	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip parse certificate" ) );
nexpaq	0:6c56fb4bc5f0	4063	ssl->state++;
nexpaq	0:6c56fb4bc5f0	4064	return( 0 );
nexpaq	0:6c56fb4bc5f0	4065	}
nexpaq	0:6c56fb4bc5f0	4066
nexpaq	0:6c56fb4bc5f0	4067	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
nexpaq	0:6c56fb4bc5f0	4068	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
nexpaq	0:6c56fb4bc5f0	4069	}
nexpaq	0:6c56fb4bc5f0	4070	#else
nexpaq	0:6c56fb4bc5f0	4071	int mbedtls_ssl_write_certificate( mbedtls_ssl_context *ssl )
nexpaq	0:6c56fb4bc5f0	4072	{
nexpaq	0:6c56fb4bc5f0	4073	int ret = MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE;
nexpaq	0:6c56fb4bc5f0	4074	size_t i, n;
nexpaq	0:6c56fb4bc5f0	4075	const mbedtls_x509_crt *crt;
nexpaq	0:6c56fb4bc5f0	4076	const mbedtls_ssl_ciphersuite_t *ciphersuite_info = ssl->transform_negotiate->ciphersuite_info;
nexpaq	0:6c56fb4bc5f0	4077
nexpaq	0:6c56fb4bc5f0	4078	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write certificate" ) );
nexpaq	0:6c56fb4bc5f0	4079
nexpaq	0:6c56fb4bc5f0	4080	if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_PSK \|\|
nexpaq	0:6c56fb4bc5f0	4081	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_DHE_PSK \|\|
nexpaq	0:6c56fb4bc5f0	4082	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_PSK \|\|
nexpaq	0:6c56fb4bc5f0	4083	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECJPAKE )
nexpaq	0:6c56fb4bc5f0	4084	{
nexpaq	0:6c56fb4bc5f0	4085	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip write certificate" ) );
nexpaq	0:6c56fb4bc5f0	4086	ssl->state++;
nexpaq	0:6c56fb4bc5f0	4087	return( 0 );
nexpaq	0:6c56fb4bc5f0	4088	}
nexpaq	0:6c56fb4bc5f0	4089
nexpaq	0:6c56fb4bc5f0	4090	#if defined(MBEDTLS_SSL_CLI_C)
nexpaq	0:6c56fb4bc5f0	4091	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_CLIENT )
nexpaq	0:6c56fb4bc5f0	4092	{
nexpaq	0:6c56fb4bc5f0	4093	if( ssl->client_auth == 0 )
nexpaq	0:6c56fb4bc5f0	4094	{
nexpaq	0:6c56fb4bc5f0	4095	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip write certificate" ) );
nexpaq	0:6c56fb4bc5f0	4096	ssl->state++;
nexpaq	0:6c56fb4bc5f0	4097	return( 0 );
nexpaq	0:6c56fb4bc5f0	4098	}
nexpaq	0:6c56fb4bc5f0	4099
nexpaq	0:6c56fb4bc5f0	4100	#if defined(MBEDTLS_SSL_PROTO_SSL3)
nexpaq	0:6c56fb4bc5f0	4101	/*
nexpaq	0:6c56fb4bc5f0	4102	* If using SSLv3 and got no cert, send an Alert message
nexpaq	0:6c56fb4bc5f0	4103	* (otherwise an empty Certificate message will be sent).
nexpaq	0:6c56fb4bc5f0	4104	*/
nexpaq	0:6c56fb4bc5f0	4105	if( mbedtls_ssl_own_cert( ssl ) == NULL &&
nexpaq	0:6c56fb4bc5f0	4106	ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 )
nexpaq	0:6c56fb4bc5f0	4107	{
nexpaq	0:6c56fb4bc5f0	4108	ssl->out_msglen = 2;
nexpaq	0:6c56fb4bc5f0	4109	ssl->out_msgtype = MBEDTLS_SSL_MSG_ALERT;
nexpaq	0:6c56fb4bc5f0	4110	ssl->out_msg[0] = MBEDTLS_SSL_ALERT_LEVEL_WARNING;
nexpaq	0:6c56fb4bc5f0	4111	ssl->out_msg[1] = MBEDTLS_SSL_ALERT_MSG_NO_CERT;
nexpaq	0:6c56fb4bc5f0	4112
nexpaq	0:6c56fb4bc5f0	4113	MBEDTLS_SSL_DEBUG_MSG( 2, ( "got no certificate to send" ) );
nexpaq	0:6c56fb4bc5f0	4114	goto write_msg;
nexpaq	0:6c56fb4bc5f0	4115	}
nexpaq	0:6c56fb4bc5f0	4116	#endif /* MBEDTLS_SSL_PROTO_SSL3 */
nexpaq	0:6c56fb4bc5f0	4117	}
nexpaq	0:6c56fb4bc5f0	4118	#endif /* MBEDTLS_SSL_CLI_C */
nexpaq	0:6c56fb4bc5f0	4119	#if defined(MBEDTLS_SSL_SRV_C)
nexpaq	0:6c56fb4bc5f0	4120	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER )
nexpaq	0:6c56fb4bc5f0	4121	{
nexpaq	0:6c56fb4bc5f0	4122	if( mbedtls_ssl_own_cert( ssl ) == NULL )
nexpaq	0:6c56fb4bc5f0	4123	{
nexpaq	0:6c56fb4bc5f0	4124	MBEDTLS_SSL_DEBUG_MSG( 1, ( "got no certificate to send" ) );
nexpaq	0:6c56fb4bc5f0	4125	return( MBEDTLS_ERR_SSL_CERTIFICATE_REQUIRED );
nexpaq	0:6c56fb4bc5f0	4126	}
nexpaq	0:6c56fb4bc5f0	4127	}
nexpaq	0:6c56fb4bc5f0	4128	#endif
nexpaq	0:6c56fb4bc5f0	4129
nexpaq	0:6c56fb4bc5f0	4130	MBEDTLS_SSL_DEBUG_CRT( 3, "own certificate", mbedtls_ssl_own_cert( ssl ) );
nexpaq	0:6c56fb4bc5f0	4131
nexpaq	0:6c56fb4bc5f0	4132	/*
nexpaq	0:6c56fb4bc5f0	4133	* 0 . 0 handshake type
nexpaq	0:6c56fb4bc5f0	4134	* 1 . 3 handshake length
nexpaq	0:6c56fb4bc5f0	4135	* 4 . 6 length of all certs
nexpaq	0:6c56fb4bc5f0	4136	* 7 . 9 length of cert. 1
nexpaq	0:6c56fb4bc5f0	4137	* 10 . n-1 peer certificate
nexpaq	0:6c56fb4bc5f0	4138	* n . n+2 length of cert. 2
nexpaq	0:6c56fb4bc5f0	4139	* n+3 . ... upper level cert, etc.
nexpaq	0:6c56fb4bc5f0	4140	*/
nexpaq	0:6c56fb4bc5f0	4141	i = 7;
nexpaq	0:6c56fb4bc5f0	4142	crt = mbedtls_ssl_own_cert( ssl );
nexpaq	0:6c56fb4bc5f0	4143
nexpaq	0:6c56fb4bc5f0	4144	while( crt != NULL )
nexpaq	0:6c56fb4bc5f0	4145	{
nexpaq	0:6c56fb4bc5f0	4146	n = crt->raw.len;
nexpaq	0:6c56fb4bc5f0	4147	if( n > MBEDTLS_SSL_MAX_CONTENT_LEN - 3 - i )
nexpaq	0:6c56fb4bc5f0	4148	{
nexpaq	0:6c56fb4bc5f0	4149	MBEDTLS_SSL_DEBUG_MSG( 1, ( "certificate too large, %d > %d",
nexpaq	0:6c56fb4bc5f0	4150	i + 3 + n, MBEDTLS_SSL_MAX_CONTENT_LEN ) );
nexpaq	0:6c56fb4bc5f0	4151	return( MBEDTLS_ERR_SSL_CERTIFICATE_TOO_LARGE );
nexpaq	0:6c56fb4bc5f0	4152	}
nexpaq	0:6c56fb4bc5f0	4153
nexpaq	0:6c56fb4bc5f0	4154	ssl->out_msg[i ] = (unsigned char)( n >> 16 );
nexpaq	0:6c56fb4bc5f0	4155	ssl->out_msg[i + 1] = (unsigned char)( n >> 8 );
nexpaq	0:6c56fb4bc5f0	4156	ssl->out_msg[i + 2] = (unsigned char)( n );
nexpaq	0:6c56fb4bc5f0	4157
nexpaq	0:6c56fb4bc5f0	4158	i += 3; memcpy( ssl->out_msg + i, crt->raw.p, n );
nexpaq	0:6c56fb4bc5f0	4159	i += n; crt = crt->next;
nexpaq	0:6c56fb4bc5f0	4160	}
nexpaq	0:6c56fb4bc5f0	4161
nexpaq	0:6c56fb4bc5f0	4162	ssl->out_msg[4] = (unsigned char)( ( i - 7 ) >> 16 );
nexpaq	0:6c56fb4bc5f0	4163	ssl->out_msg[5] = (unsigned char)( ( i - 7 ) >> 8 );
nexpaq	0:6c56fb4bc5f0	4164	ssl->out_msg[6] = (unsigned char)( ( i - 7 ) );
nexpaq	0:6c56fb4bc5f0	4165
nexpaq	0:6c56fb4bc5f0	4166	ssl->out_msglen = i;
nexpaq	0:6c56fb4bc5f0	4167	ssl->out_msgtype = MBEDTLS_SSL_MSG_HANDSHAKE;
nexpaq	0:6c56fb4bc5f0	4168	ssl->out_msg[0] = MBEDTLS_SSL_HS_CERTIFICATE;
nexpaq	0:6c56fb4bc5f0	4169
nexpaq	0:6c56fb4bc5f0	4170	#if defined(MBEDTLS_SSL_PROTO_SSL3) && defined(MBEDTLS_SSL_CLI_C)
nexpaq	0:6c56fb4bc5f0	4171	write_msg:
nexpaq	0:6c56fb4bc5f0	4172	#endif
nexpaq	0:6c56fb4bc5f0	4173
nexpaq	0:6c56fb4bc5f0	4174	ssl->state++;
nexpaq	0:6c56fb4bc5f0	4175
nexpaq	0:6c56fb4bc5f0	4176	if( ( ret = mbedtls_ssl_write_record( ssl ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	4177	{
nexpaq	0:6c56fb4bc5f0	4178	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_write_record", ret );
nexpaq	0:6c56fb4bc5f0	4179	return( ret );
nexpaq	0:6c56fb4bc5f0	4180	}
nexpaq	0:6c56fb4bc5f0	4181
nexpaq	0:6c56fb4bc5f0	4182	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= write certificate" ) );
nexpaq	0:6c56fb4bc5f0	4183
nexpaq	0:6c56fb4bc5f0	4184	return( ret );
nexpaq	0:6c56fb4bc5f0	4185	}
nexpaq	0:6c56fb4bc5f0	4186
nexpaq	0:6c56fb4bc5f0	4187	int mbedtls_ssl_parse_certificate( mbedtls_ssl_context *ssl )
nexpaq	0:6c56fb4bc5f0	4188	{
nexpaq	0:6c56fb4bc5f0	4189	int ret = MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE;
nexpaq	0:6c56fb4bc5f0	4190	size_t i, n;
nexpaq	0:6c56fb4bc5f0	4191	const mbedtls_ssl_ciphersuite_t *ciphersuite_info = ssl->transform_negotiate->ciphersuite_info;
nexpaq	0:6c56fb4bc5f0	4192	int authmode = ssl->conf->authmode;
nexpaq	0:6c56fb4bc5f0	4193
nexpaq	0:6c56fb4bc5f0	4194	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> parse certificate" ) );
nexpaq	0:6c56fb4bc5f0	4195
nexpaq	0:6c56fb4bc5f0	4196	if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_PSK \|\|
nexpaq	0:6c56fb4bc5f0	4197	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_DHE_PSK \|\|
nexpaq	0:6c56fb4bc5f0	4198	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_PSK \|\|
nexpaq	0:6c56fb4bc5f0	4199	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECJPAKE )
nexpaq	0:6c56fb4bc5f0	4200	{
nexpaq	0:6c56fb4bc5f0	4201	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip parse certificate" ) );
nexpaq	0:6c56fb4bc5f0	4202	ssl->state++;
nexpaq	0:6c56fb4bc5f0	4203	return( 0 );
nexpaq	0:6c56fb4bc5f0	4204	}
nexpaq	0:6c56fb4bc5f0	4205
nexpaq	0:6c56fb4bc5f0	4206	#if defined(MBEDTLS_SSL_SRV_C)
nexpaq	0:6c56fb4bc5f0	4207	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER &&
nexpaq	0:6c56fb4bc5f0	4208	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_RSA_PSK )
nexpaq	0:6c56fb4bc5f0	4209	{
nexpaq	0:6c56fb4bc5f0	4210	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip parse certificate" ) );
nexpaq	0:6c56fb4bc5f0	4211	ssl->state++;
nexpaq	0:6c56fb4bc5f0	4212	return( 0 );
nexpaq	0:6c56fb4bc5f0	4213	}
nexpaq	0:6c56fb4bc5f0	4214
nexpaq	0:6c56fb4bc5f0	4215	#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
nexpaq	0:6c56fb4bc5f0	4216	if( ssl->handshake->sni_authmode != MBEDTLS_SSL_VERIFY_UNSET )
nexpaq	0:6c56fb4bc5f0	4217	authmode = ssl->handshake->sni_authmode;
nexpaq	0:6c56fb4bc5f0	4218	#endif
nexpaq	0:6c56fb4bc5f0	4219
nexpaq	0:6c56fb4bc5f0	4220	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER &&
nexpaq	0:6c56fb4bc5f0	4221	authmode == MBEDTLS_SSL_VERIFY_NONE )
nexpaq	0:6c56fb4bc5f0	4222	{
nexpaq	0:6c56fb4bc5f0	4223	ssl->session_negotiate->verify_result = MBEDTLS_X509_BADCERT_SKIP_VERIFY;
nexpaq	0:6c56fb4bc5f0	4224	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip parse certificate" ) );
nexpaq	0:6c56fb4bc5f0	4225	ssl->state++;
nexpaq	0:6c56fb4bc5f0	4226	return( 0 );
nexpaq	0:6c56fb4bc5f0	4227	}
nexpaq	0:6c56fb4bc5f0	4228	#endif
nexpaq	0:6c56fb4bc5f0	4229
nexpaq	0:6c56fb4bc5f0	4230	if( ( ret = mbedtls_ssl_read_record( ssl ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	4231	{
nexpaq	0:6c56fb4bc5f0	4232	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_read_record", ret );
nexpaq	0:6c56fb4bc5f0	4233	return( ret );
nexpaq	0:6c56fb4bc5f0	4234	}
nexpaq	0:6c56fb4bc5f0	4235
nexpaq	0:6c56fb4bc5f0	4236	ssl->state++;
nexpaq	0:6c56fb4bc5f0	4237
nexpaq	0:6c56fb4bc5f0	4238	#if defined(MBEDTLS_SSL_SRV_C)
nexpaq	0:6c56fb4bc5f0	4239	#if defined(MBEDTLS_SSL_PROTO_SSL3)
nexpaq	0:6c56fb4bc5f0	4240	/*
nexpaq	0:6c56fb4bc5f0	4241	* Check if the client sent an empty certificate
nexpaq	0:6c56fb4bc5f0	4242	*/
nexpaq	0:6c56fb4bc5f0	4243	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER &&
nexpaq	0:6c56fb4bc5f0	4244	ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 )
nexpaq	0:6c56fb4bc5f0	4245	{
nexpaq	0:6c56fb4bc5f0	4246	if( ssl->in_msglen == 2 &&
nexpaq	0:6c56fb4bc5f0	4247	ssl->in_msgtype == MBEDTLS_SSL_MSG_ALERT &&
nexpaq	0:6c56fb4bc5f0	4248	ssl->in_msg[0] == MBEDTLS_SSL_ALERT_LEVEL_WARNING &&
nexpaq	0:6c56fb4bc5f0	4249	ssl->in_msg[1] == MBEDTLS_SSL_ALERT_MSG_NO_CERT )
nexpaq	0:6c56fb4bc5f0	4250	{
nexpaq	0:6c56fb4bc5f0	4251	MBEDTLS_SSL_DEBUG_MSG( 1, ( "SSLv3 client has no certificate" ) );
nexpaq	0:6c56fb4bc5f0	4252
nexpaq	0:6c56fb4bc5f0	4253	ssl->session_negotiate->verify_result = MBEDTLS_X509_BADCERT_MISSING;
nexpaq	0:6c56fb4bc5f0	4254	if( authmode == MBEDTLS_SSL_VERIFY_OPTIONAL )
nexpaq	0:6c56fb4bc5f0	4255	return( 0 );
nexpaq	0:6c56fb4bc5f0	4256	else
nexpaq	0:6c56fb4bc5f0	4257	return( MBEDTLS_ERR_SSL_NO_CLIENT_CERTIFICATE );
nexpaq	0:6c56fb4bc5f0	4258	}
nexpaq	0:6c56fb4bc5f0	4259	}
nexpaq	0:6c56fb4bc5f0	4260	#endif /* MBEDTLS_SSL_PROTO_SSL3 */
nexpaq	0:6c56fb4bc5f0	4261
nexpaq	0:6c56fb4bc5f0	4262	#if defined(MBEDTLS_SSL_PROTO_TLS1) \|\| defined(MBEDTLS_SSL_PROTO_TLS1_1) \|\| \
nexpaq	0:6c56fb4bc5f0	4263	defined(MBEDTLS_SSL_PROTO_TLS1_2)
nexpaq	0:6c56fb4bc5f0	4264	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER &&
nexpaq	0:6c56fb4bc5f0	4265	ssl->minor_ver != MBEDTLS_SSL_MINOR_VERSION_0 )
nexpaq	0:6c56fb4bc5f0	4266	{
nexpaq	0:6c56fb4bc5f0	4267	if( ssl->in_hslen == 3 + mbedtls_ssl_hs_hdr_len( ssl ) &&
nexpaq	0:6c56fb4bc5f0	4268	ssl->in_msgtype == MBEDTLS_SSL_MSG_HANDSHAKE &&
nexpaq	0:6c56fb4bc5f0	4269	ssl->in_msg[0] == MBEDTLS_SSL_HS_CERTIFICATE &&
nexpaq	0:6c56fb4bc5f0	4270	memcmp( ssl->in_msg + mbedtls_ssl_hs_hdr_len( ssl ), "\0\0\0", 3 ) == 0 )
nexpaq	0:6c56fb4bc5f0	4271	{
nexpaq	0:6c56fb4bc5f0	4272	MBEDTLS_SSL_DEBUG_MSG( 1, ( "TLSv1 client has no certificate" ) );
nexpaq	0:6c56fb4bc5f0	4273
nexpaq	0:6c56fb4bc5f0	4274	ssl->session_negotiate->verify_result = MBEDTLS_X509_BADCERT_MISSING;
nexpaq	0:6c56fb4bc5f0	4275	if( authmode == MBEDTLS_SSL_VERIFY_OPTIONAL )
nexpaq	0:6c56fb4bc5f0	4276	return( 0 );
nexpaq	0:6c56fb4bc5f0	4277	else
nexpaq	0:6c56fb4bc5f0	4278	return( MBEDTLS_ERR_SSL_NO_CLIENT_CERTIFICATE );
nexpaq	0:6c56fb4bc5f0	4279	}
nexpaq	0:6c56fb4bc5f0	4280	}
nexpaq	0:6c56fb4bc5f0	4281	#endif /* MBEDTLS_SSL_PROTO_TLS1 \|\| MBEDTLS_SSL_PROTO_TLS1_1 \|\| \
nexpaq	0:6c56fb4bc5f0	4282	MBEDTLS_SSL_PROTO_TLS1_2 */
nexpaq	0:6c56fb4bc5f0	4283	#endif /* MBEDTLS_SSL_SRV_C */
nexpaq	0:6c56fb4bc5f0	4284
nexpaq	0:6c56fb4bc5f0	4285	if( ssl->in_msgtype != MBEDTLS_SSL_MSG_HANDSHAKE )
nexpaq	0:6c56fb4bc5f0	4286	{
nexpaq	0:6c56fb4bc5f0	4287	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate message" ) );
nexpaq	0:6c56fb4bc5f0	4288	return( MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE );
nexpaq	0:6c56fb4bc5f0	4289	}
nexpaq	0:6c56fb4bc5f0	4290
nexpaq	0:6c56fb4bc5f0	4291	if( ssl->in_msg[0] != MBEDTLS_SSL_HS_CERTIFICATE \|\|
nexpaq	0:6c56fb4bc5f0	4292	ssl->in_hslen < mbedtls_ssl_hs_hdr_len( ssl ) + 3 + 3 )
nexpaq	0:6c56fb4bc5f0	4293	{
nexpaq	0:6c56fb4bc5f0	4294	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate message" ) );
nexpaq	0:6c56fb4bc5f0	4295	return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE );
nexpaq	0:6c56fb4bc5f0	4296	}
nexpaq	0:6c56fb4bc5f0	4297
nexpaq	0:6c56fb4bc5f0	4298	i = mbedtls_ssl_hs_hdr_len( ssl );
nexpaq	0:6c56fb4bc5f0	4299
nexpaq	0:6c56fb4bc5f0	4300	/*
nexpaq	0:6c56fb4bc5f0	4301	* Same message structure as in mbedtls_ssl_write_certificate()
nexpaq	0:6c56fb4bc5f0	4302	*/
nexpaq	0:6c56fb4bc5f0	4303	n = ( ssl->in_msg[i+1] << 8 ) \| ssl->in_msg[i+2];
nexpaq	0:6c56fb4bc5f0	4304
nexpaq	0:6c56fb4bc5f0	4305	if( ssl->in_msg[i] != 0 \|\|
nexpaq	0:6c56fb4bc5f0	4306	ssl->in_hslen != n + 3 + mbedtls_ssl_hs_hdr_len( ssl ) )
nexpaq	0:6c56fb4bc5f0	4307	{
nexpaq	0:6c56fb4bc5f0	4308	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate message" ) );
nexpaq	0:6c56fb4bc5f0	4309	return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE );
nexpaq	0:6c56fb4bc5f0	4310	}
nexpaq	0:6c56fb4bc5f0	4311
nexpaq	0:6c56fb4bc5f0	4312	/* In case we tried to reuse a session but it failed */
nexpaq	0:6c56fb4bc5f0	4313	if( ssl->session_negotiate->peer_cert != NULL )
nexpaq	0:6c56fb4bc5f0	4314	{
nexpaq	0:6c56fb4bc5f0	4315	mbedtls_x509_crt_free( ssl->session_negotiate->peer_cert );
nexpaq	0:6c56fb4bc5f0	4316	mbedtls_free( ssl->session_negotiate->peer_cert );
nexpaq	0:6c56fb4bc5f0	4317	}
nexpaq	0:6c56fb4bc5f0	4318
nexpaq	0:6c56fb4bc5f0	4319	if( ( ssl->session_negotiate->peer_cert = mbedtls_calloc( 1,
nexpaq	0:6c56fb4bc5f0	4320	sizeof( mbedtls_x509_crt ) ) ) == NULL )
nexpaq	0:6c56fb4bc5f0	4321	{
nexpaq	0:6c56fb4bc5f0	4322	MBEDTLS_SSL_DEBUG_MSG( 1, ( "alloc(%d bytes) failed",
nexpaq	0:6c56fb4bc5f0	4323	sizeof( mbedtls_x509_crt ) ) );
nexpaq	0:6c56fb4bc5f0	4324	return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
nexpaq	0:6c56fb4bc5f0	4325	}
nexpaq	0:6c56fb4bc5f0	4326
nexpaq	0:6c56fb4bc5f0	4327	mbedtls_x509_crt_init( ssl->session_negotiate->peer_cert );
nexpaq	0:6c56fb4bc5f0	4328
nexpaq	0:6c56fb4bc5f0	4329	i += 3;
nexpaq	0:6c56fb4bc5f0	4330
nexpaq	0:6c56fb4bc5f0	4331	while( i < ssl->in_hslen )
nexpaq	0:6c56fb4bc5f0	4332	{
nexpaq	0:6c56fb4bc5f0	4333	if( ssl->in_msg[i] != 0 )
nexpaq	0:6c56fb4bc5f0	4334	{
nexpaq	0:6c56fb4bc5f0	4335	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate message" ) );
nexpaq	0:6c56fb4bc5f0	4336	return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE );
nexpaq	0:6c56fb4bc5f0	4337	}
nexpaq	0:6c56fb4bc5f0	4338
nexpaq	0:6c56fb4bc5f0	4339	n = ( (unsigned int) ssl->in_msg[i + 1] << 8 )
nexpaq	0:6c56fb4bc5f0	4340	\| (unsigned int) ssl->in_msg[i + 2];
nexpaq	0:6c56fb4bc5f0	4341	i += 3;
nexpaq	0:6c56fb4bc5f0	4342
nexpaq	0:6c56fb4bc5f0	4343	if( n < 128 \|\| i + n > ssl->in_hslen )
nexpaq	0:6c56fb4bc5f0	4344	{
nexpaq	0:6c56fb4bc5f0	4345	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate message" ) );
nexpaq	0:6c56fb4bc5f0	4346	return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE );
nexpaq	0:6c56fb4bc5f0	4347	}
nexpaq	0:6c56fb4bc5f0	4348
nexpaq	0:6c56fb4bc5f0	4349	ret = mbedtls_x509_crt_parse_der( ssl->session_negotiate->peer_cert,
nexpaq	0:6c56fb4bc5f0	4350	ssl->in_msg + i, n );
nexpaq	0:6c56fb4bc5f0	4351	if( ret != 0 )
nexpaq	0:6c56fb4bc5f0	4352	{
nexpaq	0:6c56fb4bc5f0	4353	MBEDTLS_SSL_DEBUG_RET( 1, " mbedtls_x509_crt_parse_der", ret );
nexpaq	0:6c56fb4bc5f0	4354	return( ret );
nexpaq	0:6c56fb4bc5f0	4355	}
nexpaq	0:6c56fb4bc5f0	4356
nexpaq	0:6c56fb4bc5f0	4357	i += n;
nexpaq	0:6c56fb4bc5f0	4358	}
nexpaq	0:6c56fb4bc5f0	4359
nexpaq	0:6c56fb4bc5f0	4360	MBEDTLS_SSL_DEBUG_CRT( 3, "peer certificate", ssl->session_negotiate->peer_cert );
nexpaq	0:6c56fb4bc5f0	4361
nexpaq	0:6c56fb4bc5f0	4362	/*
nexpaq	0:6c56fb4bc5f0	4363	* On client, make sure the server cert doesn't change during renego to
nexpaq	0:6c56fb4bc5f0	4364	* avoid "triple handshake" attack: https://secure-resumption.com/
nexpaq	0:6c56fb4bc5f0	4365	*/
nexpaq	0:6c56fb4bc5f0	4366	#if defined(MBEDTLS_SSL_RENEGOTIATION) && defined(MBEDTLS_SSL_CLI_C)
nexpaq	0:6c56fb4bc5f0	4367	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_CLIENT &&
nexpaq	0:6c56fb4bc5f0	4368	ssl->renego_status == MBEDTLS_SSL_RENEGOTIATION_IN_PROGRESS )
nexpaq	0:6c56fb4bc5f0	4369	{
nexpaq	0:6c56fb4bc5f0	4370	if( ssl->session->peer_cert == NULL )
nexpaq	0:6c56fb4bc5f0	4371	{
nexpaq	0:6c56fb4bc5f0	4372	MBEDTLS_SSL_DEBUG_MSG( 1, ( "new server cert during renegotiation" ) );
nexpaq	0:6c56fb4bc5f0	4373	return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE );
nexpaq	0:6c56fb4bc5f0	4374	}
nexpaq	0:6c56fb4bc5f0	4375
nexpaq	0:6c56fb4bc5f0	4376	if( ssl->session->peer_cert->raw.len !=
nexpaq	0:6c56fb4bc5f0	4377	ssl->session_negotiate->peer_cert->raw.len \|\|
nexpaq	0:6c56fb4bc5f0	4378	memcmp( ssl->session->peer_cert->raw.p,
nexpaq	0:6c56fb4bc5f0	4379	ssl->session_negotiate->peer_cert->raw.p,
nexpaq	0:6c56fb4bc5f0	4380	ssl->session->peer_cert->raw.len ) != 0 )
nexpaq	0:6c56fb4bc5f0	4381	{
nexpaq	0:6c56fb4bc5f0	4382	MBEDTLS_SSL_DEBUG_MSG( 1, ( "server cert changed during renegotiation" ) );
nexpaq	0:6c56fb4bc5f0	4383	return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE );
nexpaq	0:6c56fb4bc5f0	4384	}
nexpaq	0:6c56fb4bc5f0	4385	}
nexpaq	0:6c56fb4bc5f0	4386	#endif /* MBEDTLS_SSL_RENEGOTIATION && MBEDTLS_SSL_CLI_C */
nexpaq	0:6c56fb4bc5f0	4387
nexpaq	0:6c56fb4bc5f0	4388	if( authmode != MBEDTLS_SSL_VERIFY_NONE )
nexpaq	0:6c56fb4bc5f0	4389	{
nexpaq	0:6c56fb4bc5f0	4390	mbedtls_x509_crt *ca_chain;
nexpaq	0:6c56fb4bc5f0	4391	mbedtls_x509_crl *ca_crl;
nexpaq	0:6c56fb4bc5f0	4392
nexpaq	0:6c56fb4bc5f0	4393	#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
nexpaq	0:6c56fb4bc5f0	4394	if( ssl->handshake->sni_ca_chain != NULL )
nexpaq	0:6c56fb4bc5f0	4395	{
nexpaq	0:6c56fb4bc5f0	4396	ca_chain = ssl->handshake->sni_ca_chain;
nexpaq	0:6c56fb4bc5f0	4397	ca_crl = ssl->handshake->sni_ca_crl;
nexpaq	0:6c56fb4bc5f0	4398	}
nexpaq	0:6c56fb4bc5f0	4399	else
nexpaq	0:6c56fb4bc5f0	4400	#endif
nexpaq	0:6c56fb4bc5f0	4401	{
nexpaq	0:6c56fb4bc5f0	4402	ca_chain = ssl->conf->ca_chain;
nexpaq	0:6c56fb4bc5f0	4403	ca_crl = ssl->conf->ca_crl;
nexpaq	0:6c56fb4bc5f0	4404	}
nexpaq	0:6c56fb4bc5f0	4405
nexpaq	0:6c56fb4bc5f0	4406	if( ca_chain == NULL )
nexpaq	0:6c56fb4bc5f0	4407	{
nexpaq	0:6c56fb4bc5f0	4408	MBEDTLS_SSL_DEBUG_MSG( 1, ( "got no CA chain" ) );
nexpaq	0:6c56fb4bc5f0	4409	return( MBEDTLS_ERR_SSL_CA_CHAIN_REQUIRED );
nexpaq	0:6c56fb4bc5f0	4410	}
nexpaq	0:6c56fb4bc5f0	4411
nexpaq	0:6c56fb4bc5f0	4412	/*
nexpaq	0:6c56fb4bc5f0	4413	* Main check: verify certificate
nexpaq	0:6c56fb4bc5f0	4414	*/
nexpaq	0:6c56fb4bc5f0	4415	ret = mbedtls_x509_crt_verify_with_profile(
nexpaq	0:6c56fb4bc5f0	4416	ssl->session_negotiate->peer_cert,
nexpaq	0:6c56fb4bc5f0	4417	ca_chain, ca_crl,
nexpaq	0:6c56fb4bc5f0	4418	ssl->conf->cert_profile,
nexpaq	0:6c56fb4bc5f0	4419	ssl->hostname,
nexpaq	0:6c56fb4bc5f0	4420	&ssl->session_negotiate->verify_result,
nexpaq	0:6c56fb4bc5f0	4421	ssl->conf->f_vrfy, ssl->conf->p_vrfy );
nexpaq	0:6c56fb4bc5f0	4422
nexpaq	0:6c56fb4bc5f0	4423	if( ret != 0 )
nexpaq	0:6c56fb4bc5f0	4424	{
nexpaq	0:6c56fb4bc5f0	4425	MBEDTLS_SSL_DEBUG_RET( 1, "x509_verify_cert", ret );
nexpaq	0:6c56fb4bc5f0	4426	}
nexpaq	0:6c56fb4bc5f0	4427
nexpaq	0:6c56fb4bc5f0	4428	/*
nexpaq	0:6c56fb4bc5f0	4429	* Secondary checks: always done, but change 'ret' only if it was 0
nexpaq	0:6c56fb4bc5f0	4430	*/
nexpaq	0:6c56fb4bc5f0	4431
nexpaq	0:6c56fb4bc5f0	4432	#if defined(MBEDTLS_ECP_C)
nexpaq	0:6c56fb4bc5f0	4433	{
nexpaq	0:6c56fb4bc5f0	4434	const mbedtls_pk_context *pk = &ssl->session_negotiate->peer_cert->pk;
nexpaq	0:6c56fb4bc5f0	4435
nexpaq	0:6c56fb4bc5f0	4436	/* If certificate uses an EC key, make sure the curve is OK */
nexpaq	0:6c56fb4bc5f0	4437	if( mbedtls_pk_can_do( pk, MBEDTLS_PK_ECKEY ) &&
nexpaq	0:6c56fb4bc5f0	4438	mbedtls_ssl_check_curve( ssl, mbedtls_pk_ec( *pk )->grp.id ) != 0 )
nexpaq	0:6c56fb4bc5f0	4439	{
nexpaq	0:6c56fb4bc5f0	4440	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate (EC key curve)" ) );
nexpaq	0:6c56fb4bc5f0	4441	if( ret == 0 )
nexpaq	0:6c56fb4bc5f0	4442	ret = MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE;
nexpaq	0:6c56fb4bc5f0	4443	}
nexpaq	0:6c56fb4bc5f0	4444	}
nexpaq	0:6c56fb4bc5f0	4445	#endif /* MBEDTLS_ECP_C */
nexpaq	0:6c56fb4bc5f0	4446
nexpaq	0:6c56fb4bc5f0	4447	if( mbedtls_ssl_check_cert_usage( ssl->session_negotiate->peer_cert,
nexpaq	0:6c56fb4bc5f0	4448	ciphersuite_info,
nexpaq	0:6c56fb4bc5f0	4449	! ssl->conf->endpoint,
nexpaq	0:6c56fb4bc5f0	4450	&ssl->session_negotiate->verify_result ) != 0 )
nexpaq	0:6c56fb4bc5f0	4451	{
nexpaq	0:6c56fb4bc5f0	4452	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate (usage extensions)" ) );
nexpaq	0:6c56fb4bc5f0	4453	if( ret == 0 )
nexpaq	0:6c56fb4bc5f0	4454	ret = MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE;
nexpaq	0:6c56fb4bc5f0	4455	}
nexpaq	0:6c56fb4bc5f0	4456
nexpaq	0:6c56fb4bc5f0	4457	if( authmode == MBEDTLS_SSL_VERIFY_OPTIONAL )
nexpaq	0:6c56fb4bc5f0	4458	ret = 0;
nexpaq	0:6c56fb4bc5f0	4459	}
nexpaq	0:6c56fb4bc5f0	4460
nexpaq	0:6c56fb4bc5f0	4461	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= parse certificate" ) );
nexpaq	0:6c56fb4bc5f0	4462
nexpaq	0:6c56fb4bc5f0	4463	return( ret );
nexpaq	0:6c56fb4bc5f0	4464	}
nexpaq	0:6c56fb4bc5f0	4465	#endif /* !MBEDTLS_KEY_EXCHANGE_RSA_ENABLED
nexpaq	0:6c56fb4bc5f0	4466	!MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED
nexpaq	0:6c56fb4bc5f0	4467	!MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED
nexpaq	0:6c56fb4bc5f0	4468	!MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED
nexpaq	0:6c56fb4bc5f0	4469	!MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED
nexpaq	0:6c56fb4bc5f0	4470	!MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED
nexpaq	0:6c56fb4bc5f0	4471	!MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED */
nexpaq	0:6c56fb4bc5f0	4472
nexpaq	0:6c56fb4bc5f0	4473	int mbedtls_ssl_write_change_cipher_spec( mbedtls_ssl_context *ssl )
nexpaq	0:6c56fb4bc5f0	4474	{
nexpaq	0:6c56fb4bc5f0	4475	int ret;
nexpaq	0:6c56fb4bc5f0	4476
nexpaq	0:6c56fb4bc5f0	4477	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write change cipher spec" ) );
nexpaq	0:6c56fb4bc5f0	4478
nexpaq	0:6c56fb4bc5f0	4479	ssl->out_msgtype = MBEDTLS_SSL_MSG_CHANGE_CIPHER_SPEC;
nexpaq	0:6c56fb4bc5f0	4480	ssl->out_msglen = 1;
nexpaq	0:6c56fb4bc5f0	4481	ssl->out_msg[0] = 1;
nexpaq	0:6c56fb4bc5f0	4482
nexpaq	0:6c56fb4bc5f0	4483	ssl->state++;
nexpaq	0:6c56fb4bc5f0	4484
nexpaq	0:6c56fb4bc5f0	4485	if( ( ret = mbedtls_ssl_write_record( ssl ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	4486	{
nexpaq	0:6c56fb4bc5f0	4487	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_write_record", ret );
nexpaq	0:6c56fb4bc5f0	4488	return( ret );
nexpaq	0:6c56fb4bc5f0	4489	}
nexpaq	0:6c56fb4bc5f0	4490
nexpaq	0:6c56fb4bc5f0	4491	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= write change cipher spec" ) );
nexpaq	0:6c56fb4bc5f0	4492
nexpaq	0:6c56fb4bc5f0	4493	return( 0 );
nexpaq	0:6c56fb4bc5f0	4494	}
nexpaq	0:6c56fb4bc5f0	4495
nexpaq	0:6c56fb4bc5f0	4496	int mbedtls_ssl_parse_change_cipher_spec( mbedtls_ssl_context *ssl )
nexpaq	0:6c56fb4bc5f0	4497	{
nexpaq	0:6c56fb4bc5f0	4498	int ret;
nexpaq	0:6c56fb4bc5f0	4499
nexpaq	0:6c56fb4bc5f0	4500	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> parse change cipher spec" ) );
nexpaq	0:6c56fb4bc5f0	4501
nexpaq	0:6c56fb4bc5f0	4502	if( ( ret = mbedtls_ssl_read_record( ssl ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	4503	{
nexpaq	0:6c56fb4bc5f0	4504	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_read_record", ret );
nexpaq	0:6c56fb4bc5f0	4505	return( ret );
nexpaq	0:6c56fb4bc5f0	4506	}
nexpaq	0:6c56fb4bc5f0	4507
nexpaq	0:6c56fb4bc5f0	4508	if( ssl->in_msgtype != MBEDTLS_SSL_MSG_CHANGE_CIPHER_SPEC )
nexpaq	0:6c56fb4bc5f0	4509	{
nexpaq	0:6c56fb4bc5f0	4510	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad change cipher spec message" ) );
nexpaq	0:6c56fb4bc5f0	4511	return( MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE );
nexpaq	0:6c56fb4bc5f0	4512	}
nexpaq	0:6c56fb4bc5f0	4513
nexpaq	0:6c56fb4bc5f0	4514	if( ssl->in_msglen != 1 \|\| ssl->in_msg[0] != 1 )
nexpaq	0:6c56fb4bc5f0	4515	{
nexpaq	0:6c56fb4bc5f0	4516	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad change cipher spec message" ) );
nexpaq	0:6c56fb4bc5f0	4517	return( MBEDTLS_ERR_SSL_BAD_HS_CHANGE_CIPHER_SPEC );
nexpaq	0:6c56fb4bc5f0	4518	}
nexpaq	0:6c56fb4bc5f0	4519
nexpaq	0:6c56fb4bc5f0	4520	/*
nexpaq	0:6c56fb4bc5f0	4521	* Switch to our negotiated transform and session parameters for inbound
nexpaq	0:6c56fb4bc5f0	4522	* data.
nexpaq	0:6c56fb4bc5f0	4523	*/
nexpaq	0:6c56fb4bc5f0	4524	MBEDTLS_SSL_DEBUG_MSG( 3, ( "switching to new transform spec for inbound data" ) );
nexpaq	0:6c56fb4bc5f0	4525	ssl->transform_in = ssl->transform_negotiate;
nexpaq	0:6c56fb4bc5f0	4526	ssl->session_in = ssl->session_negotiate;
nexpaq	0:6c56fb4bc5f0	4527
nexpaq	0:6c56fb4bc5f0	4528	#if defined(MBEDTLS_SSL_PROTO_DTLS)
nexpaq	0:6c56fb4bc5f0	4529	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
nexpaq	0:6c56fb4bc5f0	4530	{
nexpaq	0:6c56fb4bc5f0	4531	#if defined(MBEDTLS_SSL_DTLS_ANTI_REPLAY)
nexpaq	0:6c56fb4bc5f0	4532	ssl_dtls_replay_reset( ssl );
nexpaq	0:6c56fb4bc5f0	4533	#endif
nexpaq	0:6c56fb4bc5f0	4534
nexpaq	0:6c56fb4bc5f0	4535	/* Increment epoch */
nexpaq	0:6c56fb4bc5f0	4536	if( ++ssl->in_epoch == 0 )
nexpaq	0:6c56fb4bc5f0	4537	{
nexpaq	0:6c56fb4bc5f0	4538	MBEDTLS_SSL_DEBUG_MSG( 1, ( "DTLS epoch would wrap" ) );
nexpaq	0:6c56fb4bc5f0	4539	return( MBEDTLS_ERR_SSL_COUNTER_WRAPPING );
nexpaq	0:6c56fb4bc5f0	4540	}
nexpaq	0:6c56fb4bc5f0	4541	}
nexpaq	0:6c56fb4bc5f0	4542	else
nexpaq	0:6c56fb4bc5f0	4543	#endif /* MBEDTLS_SSL_PROTO_DTLS */
nexpaq	0:6c56fb4bc5f0	4544	memset( ssl->in_ctr, 0, 8 );
nexpaq	0:6c56fb4bc5f0	4545
nexpaq	0:6c56fb4bc5f0	4546	/*
nexpaq	0:6c56fb4bc5f0	4547	* Set the in_msg pointer to the correct location based on IV length
nexpaq	0:6c56fb4bc5f0	4548	*/
nexpaq	0:6c56fb4bc5f0	4549	if( ssl->minor_ver >= MBEDTLS_SSL_MINOR_VERSION_2 )
nexpaq	0:6c56fb4bc5f0	4550	{
nexpaq	0:6c56fb4bc5f0	4551	ssl->in_msg = ssl->in_iv + ssl->transform_negotiate->ivlen -
nexpaq	0:6c56fb4bc5f0	4552	ssl->transform_negotiate->fixed_ivlen;
nexpaq	0:6c56fb4bc5f0	4553	}
nexpaq	0:6c56fb4bc5f0	4554	else
nexpaq	0:6c56fb4bc5f0	4555	ssl->in_msg = ssl->in_iv;
nexpaq	0:6c56fb4bc5f0	4556
nexpaq	0:6c56fb4bc5f0	4557	#if defined(MBEDTLS_SSL_HW_RECORD_ACCEL)
nexpaq	0:6c56fb4bc5f0	4558	if( mbedtls_ssl_hw_record_activate != NULL )
nexpaq	0:6c56fb4bc5f0	4559	{
nexpaq	0:6c56fb4bc5f0	4560	if( ( ret = mbedtls_ssl_hw_record_activate( ssl, MBEDTLS_SSL_CHANNEL_INBOUND ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	4561	{
nexpaq	0:6c56fb4bc5f0	4562	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_hw_record_activate", ret );
nexpaq	0:6c56fb4bc5f0	4563	return( MBEDTLS_ERR_SSL_HW_ACCEL_FAILED );
nexpaq	0:6c56fb4bc5f0	4564	}
nexpaq	0:6c56fb4bc5f0	4565	}
nexpaq	0:6c56fb4bc5f0	4566	#endif
nexpaq	0:6c56fb4bc5f0	4567
nexpaq	0:6c56fb4bc5f0	4568	ssl->state++;
nexpaq	0:6c56fb4bc5f0	4569
nexpaq	0:6c56fb4bc5f0	4570	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= parse change cipher spec" ) );
nexpaq	0:6c56fb4bc5f0	4571
nexpaq	0:6c56fb4bc5f0	4572	return( 0 );
nexpaq	0:6c56fb4bc5f0	4573	}
nexpaq	0:6c56fb4bc5f0	4574
nexpaq	0:6c56fb4bc5f0	4575	void mbedtls_ssl_optimize_checksum( mbedtls_ssl_context *ssl,
nexpaq	0:6c56fb4bc5f0	4576	const mbedtls_ssl_ciphersuite_t *ciphersuite_info )
nexpaq	0:6c56fb4bc5f0	4577	{
nexpaq	0:6c56fb4bc5f0	4578	((void) ciphersuite_info);
nexpaq	0:6c56fb4bc5f0	4579
nexpaq	0:6c56fb4bc5f0	4580	#if defined(MBEDTLS_SSL_PROTO_SSL3) \|\| defined(MBEDTLS_SSL_PROTO_TLS1) \|\| \
nexpaq	0:6c56fb4bc5f0	4581	defined(MBEDTLS_SSL_PROTO_TLS1_1)
nexpaq	0:6c56fb4bc5f0	4582	if( ssl->minor_ver < MBEDTLS_SSL_MINOR_VERSION_3 )
nexpaq	0:6c56fb4bc5f0	4583	ssl->handshake->update_checksum = ssl_update_checksum_md5sha1;
nexpaq	0:6c56fb4bc5f0	4584	else
nexpaq	0:6c56fb4bc5f0	4585	#endif
nexpaq	0:6c56fb4bc5f0	4586	#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
nexpaq	0:6c56fb4bc5f0	4587	#if defined(MBEDTLS_SHA512_C)
nexpaq	0:6c56fb4bc5f0	4588	if( ciphersuite_info->mac == MBEDTLS_MD_SHA384 )
nexpaq	0:6c56fb4bc5f0	4589	ssl->handshake->update_checksum = ssl_update_checksum_sha384;
nexpaq	0:6c56fb4bc5f0	4590	else
nexpaq	0:6c56fb4bc5f0	4591	#endif
nexpaq	0:6c56fb4bc5f0	4592	#if defined(MBEDTLS_SHA256_C)
nexpaq	0:6c56fb4bc5f0	4593	if( ciphersuite_info->mac != MBEDTLS_MD_SHA384 )
nexpaq	0:6c56fb4bc5f0	4594	ssl->handshake->update_checksum = ssl_update_checksum_sha256;
nexpaq	0:6c56fb4bc5f0	4595	else
nexpaq	0:6c56fb4bc5f0	4596	#endif
nexpaq	0:6c56fb4bc5f0	4597	#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
nexpaq	0:6c56fb4bc5f0	4598	{
nexpaq	0:6c56fb4bc5f0	4599	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
nexpaq	0:6c56fb4bc5f0	4600	return;
nexpaq	0:6c56fb4bc5f0	4601	}
nexpaq	0:6c56fb4bc5f0	4602	}
nexpaq	0:6c56fb4bc5f0	4603
nexpaq	0:6c56fb4bc5f0	4604	void mbedtls_ssl_reset_checksum( mbedtls_ssl_context *ssl )
nexpaq	0:6c56fb4bc5f0	4605	{
nexpaq	0:6c56fb4bc5f0	4606	#if defined(MBEDTLS_SSL_PROTO_SSL3) \|\| defined(MBEDTLS_SSL_PROTO_TLS1) \|\| \
nexpaq	0:6c56fb4bc5f0	4607	defined(MBEDTLS_SSL_PROTO_TLS1_1)
nexpaq	0:6c56fb4bc5f0	4608	mbedtls_md5_starts( &ssl->handshake->fin_md5 );
nexpaq	0:6c56fb4bc5f0	4609	mbedtls_sha1_starts( &ssl->handshake->fin_sha1 );
nexpaq	0:6c56fb4bc5f0	4610	#endif
nexpaq	0:6c56fb4bc5f0	4611	#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
nexpaq	0:6c56fb4bc5f0	4612	#if defined(MBEDTLS_SHA256_C)
nexpaq	0:6c56fb4bc5f0	4613	mbedtls_sha256_starts( &ssl->handshake->fin_sha256, 0 );
nexpaq	0:6c56fb4bc5f0	4614	#endif
nexpaq	0:6c56fb4bc5f0	4615	#if defined(MBEDTLS_SHA512_C)
nexpaq	0:6c56fb4bc5f0	4616	mbedtls_sha512_starts( &ssl->handshake->fin_sha512, 1 );
nexpaq	0:6c56fb4bc5f0	4617	#endif
nexpaq	0:6c56fb4bc5f0	4618	#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
nexpaq	0:6c56fb4bc5f0	4619	}
nexpaq	0:6c56fb4bc5f0	4620
nexpaq	0:6c56fb4bc5f0	4621	static void ssl_update_checksum_start( mbedtls_ssl_context *ssl,
nexpaq	0:6c56fb4bc5f0	4622	const unsigned char *buf, size_t len )
nexpaq	0:6c56fb4bc5f0	4623	{
nexpaq	0:6c56fb4bc5f0	4624	#if defined(MBEDTLS_SSL_PROTO_SSL3) \|\| defined(MBEDTLS_SSL_PROTO_TLS1) \|\| \
nexpaq	0:6c56fb4bc5f0	4625	defined(MBEDTLS_SSL_PROTO_TLS1_1)
nexpaq	0:6c56fb4bc5f0	4626	mbedtls_md5_update( &ssl->handshake->fin_md5 , buf, len );
nexpaq	0:6c56fb4bc5f0	4627	mbedtls_sha1_update( &ssl->handshake->fin_sha1, buf, len );
nexpaq	0:6c56fb4bc5f0	4628	#endif
nexpaq	0:6c56fb4bc5f0	4629	#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
nexpaq	0:6c56fb4bc5f0	4630	#if defined(MBEDTLS_SHA256_C)
nexpaq	0:6c56fb4bc5f0	4631	mbedtls_sha256_update( &ssl->handshake->fin_sha256, buf, len );
nexpaq	0:6c56fb4bc5f0	4632	#endif
nexpaq	0:6c56fb4bc5f0	4633	#if defined(MBEDTLS_SHA512_C)
nexpaq	0:6c56fb4bc5f0	4634	mbedtls_sha512_update( &ssl->handshake->fin_sha512, buf, len );
nexpaq	0:6c56fb4bc5f0	4635	#endif
nexpaq	0:6c56fb4bc5f0	4636	#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
nexpaq	0:6c56fb4bc5f0	4637	}
nexpaq	0:6c56fb4bc5f0	4638
nexpaq	0:6c56fb4bc5f0	4639	#if defined(MBEDTLS_SSL_PROTO_SSL3) \|\| defined(MBEDTLS_SSL_PROTO_TLS1) \|\| \
nexpaq	0:6c56fb4bc5f0	4640	defined(MBEDTLS_SSL_PROTO_TLS1_1)
nexpaq	0:6c56fb4bc5f0	4641	static void ssl_update_checksum_md5sha1( mbedtls_ssl_context *ssl,
nexpaq	0:6c56fb4bc5f0	4642	const unsigned char *buf, size_t len )
nexpaq	0:6c56fb4bc5f0	4643	{
nexpaq	0:6c56fb4bc5f0	4644	mbedtls_md5_update( &ssl->handshake->fin_md5 , buf, len );
nexpaq	0:6c56fb4bc5f0	4645	mbedtls_sha1_update( &ssl->handshake->fin_sha1, buf, len );
nexpaq	0:6c56fb4bc5f0	4646	}
nexpaq	0:6c56fb4bc5f0	4647	#endif
nexpaq	0:6c56fb4bc5f0	4648
nexpaq	0:6c56fb4bc5f0	4649	#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
nexpaq	0:6c56fb4bc5f0	4650	#if defined(MBEDTLS_SHA256_C)
nexpaq	0:6c56fb4bc5f0	4651	static void ssl_update_checksum_sha256( mbedtls_ssl_context *ssl,
nexpaq	0:6c56fb4bc5f0	4652	const unsigned char *buf, size_t len )
nexpaq	0:6c56fb4bc5f0	4653	{
nexpaq	0:6c56fb4bc5f0	4654	mbedtls_sha256_update( &ssl->handshake->fin_sha256, buf, len );
nexpaq	0:6c56fb4bc5f0	4655	}
nexpaq	0:6c56fb4bc5f0	4656	#endif
nexpaq	0:6c56fb4bc5f0	4657
nexpaq	0:6c56fb4bc5f0	4658	#if defined(MBEDTLS_SHA512_C)
nexpaq	0:6c56fb4bc5f0	4659	static void ssl_update_checksum_sha384( mbedtls_ssl_context *ssl,
nexpaq	0:6c56fb4bc5f0	4660	const unsigned char *buf, size_t len )
nexpaq	0:6c56fb4bc5f0	4661	{
nexpaq	0:6c56fb4bc5f0	4662	mbedtls_sha512_update( &ssl->handshake->fin_sha512, buf, len );
nexpaq	0:6c56fb4bc5f0	4663	}
nexpaq	0:6c56fb4bc5f0	4664	#endif
nexpaq	0:6c56fb4bc5f0	4665	#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
nexpaq	0:6c56fb4bc5f0	4666
nexpaq	0:6c56fb4bc5f0	4667	#if defined(MBEDTLS_SSL_PROTO_SSL3)
nexpaq	0:6c56fb4bc5f0	4668	static void ssl_calc_finished_ssl(
nexpaq	0:6c56fb4bc5f0	4669	mbedtls_ssl_context ssl, unsigned char buf, int from )
nexpaq	0:6c56fb4bc5f0	4670	{
nexpaq	0:6c56fb4bc5f0	4671	const char *sender;
nexpaq	0:6c56fb4bc5f0	4672	mbedtls_md5_context md5;
nexpaq	0:6c56fb4bc5f0	4673	mbedtls_sha1_context sha1;
nexpaq	0:6c56fb4bc5f0	4674
nexpaq	0:6c56fb4bc5f0	4675	unsigned char padbuf[48];
nexpaq	0:6c56fb4bc5f0	4676	unsigned char md5sum[16];
nexpaq	0:6c56fb4bc5f0	4677	unsigned char sha1sum[20];
nexpaq	0:6c56fb4bc5f0	4678
nexpaq	0:6c56fb4bc5f0	4679	mbedtls_ssl_session *session = ssl->session_negotiate;
nexpaq	0:6c56fb4bc5f0	4680	if( !session )
nexpaq	0:6c56fb4bc5f0	4681	session = ssl->session;
nexpaq	0:6c56fb4bc5f0	4682
nexpaq	0:6c56fb4bc5f0	4683	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> calc finished ssl" ) );
nexpaq	0:6c56fb4bc5f0	4684
nexpaq	0:6c56fb4bc5f0	4685	mbedtls_md5_init( &md5 );
nexpaq	0:6c56fb4bc5f0	4686	mbedtls_sha1_init( &sha1 );
nexpaq	0:6c56fb4bc5f0	4687
nexpaq	0:6c56fb4bc5f0	4688	mbedtls_md5_clone( &md5, &ssl->handshake->fin_md5 );
nexpaq	0:6c56fb4bc5f0	4689	mbedtls_sha1_clone( &sha1, &ssl->handshake->fin_sha1 );
nexpaq	0:6c56fb4bc5f0	4690
nexpaq	0:6c56fb4bc5f0	4691	/*
nexpaq	0:6c56fb4bc5f0	4692	* SSLv3:
nexpaq	0:6c56fb4bc5f0	4693	* hash =
nexpaq	0:6c56fb4bc5f0	4694	* MD5( master + pad2 +
nexpaq	0:6c56fb4bc5f0	4695	* MD5( handshake + sender + master + pad1 ) )
nexpaq	0:6c56fb4bc5f0	4696	* + SHA1( master + pad2 +
nexpaq	0:6c56fb4bc5f0	4697	* SHA1( handshake + sender + master + pad1 ) )
nexpaq	0:6c56fb4bc5f0	4698	*/
nexpaq	0:6c56fb4bc5f0	4699
nexpaq	0:6c56fb4bc5f0	4700	#if !defined(MBEDTLS_MD5_ALT)
nexpaq	0:6c56fb4bc5f0	4701	MBEDTLS_SSL_DEBUG_BUF( 4, "finished md5 state", (unsigned char *)
nexpaq	0:6c56fb4bc5f0	4702	md5.state, sizeof( md5.state ) );
nexpaq	0:6c56fb4bc5f0	4703	#endif
nexpaq	0:6c56fb4bc5f0	4704
nexpaq	0:6c56fb4bc5f0	4705	#if !defined(MBEDTLS_SHA1_ALT)
nexpaq	0:6c56fb4bc5f0	4706	MBEDTLS_SSL_DEBUG_BUF( 4, "finished sha1 state", (unsigned char *)
nexpaq	0:6c56fb4bc5f0	4707	sha1.state, sizeof( sha1.state ) );
nexpaq	0:6c56fb4bc5f0	4708	#endif
nexpaq	0:6c56fb4bc5f0	4709
nexpaq	0:6c56fb4bc5f0	4710	sender = ( from == MBEDTLS_SSL_IS_CLIENT ) ? "CLNT"
nexpaq	0:6c56fb4bc5f0	4711	: "SRVR";
nexpaq	0:6c56fb4bc5f0	4712
nexpaq	0:6c56fb4bc5f0	4713	memset( padbuf, 0x36, 48 );
nexpaq	0:6c56fb4bc5f0	4714
nexpaq	0:6c56fb4bc5f0	4715	mbedtls_md5_update( &md5, (const unsigned char *) sender, 4 );
nexpaq	0:6c56fb4bc5f0	4716	mbedtls_md5_update( &md5, session->master, 48 );
nexpaq	0:6c56fb4bc5f0	4717	mbedtls_md5_update( &md5, padbuf, 48 );
nexpaq	0:6c56fb4bc5f0	4718	mbedtls_md5_finish( &md5, md5sum );
nexpaq	0:6c56fb4bc5f0	4719
nexpaq	0:6c56fb4bc5f0	4720	mbedtls_sha1_update( &sha1, (const unsigned char *) sender, 4 );
nexpaq	0:6c56fb4bc5f0	4721	mbedtls_sha1_update( &sha1, session->master, 48 );
nexpaq	0:6c56fb4bc5f0	4722	mbedtls_sha1_update( &sha1, padbuf, 40 );
nexpaq	0:6c56fb4bc5f0	4723	mbedtls_sha1_finish( &sha1, sha1sum );
nexpaq	0:6c56fb4bc5f0	4724
nexpaq	0:6c56fb4bc5f0	4725	memset( padbuf, 0x5C, 48 );
nexpaq	0:6c56fb4bc5f0	4726
nexpaq	0:6c56fb4bc5f0	4727	mbedtls_md5_starts( &md5 );
nexpaq	0:6c56fb4bc5f0	4728	mbedtls_md5_update( &md5, session->master, 48 );
nexpaq	0:6c56fb4bc5f0	4729	mbedtls_md5_update( &md5, padbuf, 48 );
nexpaq	0:6c56fb4bc5f0	4730	mbedtls_md5_update( &md5, md5sum, 16 );
nexpaq	0:6c56fb4bc5f0	4731	mbedtls_md5_finish( &md5, buf );
nexpaq	0:6c56fb4bc5f0	4732
nexpaq	0:6c56fb4bc5f0	4733	mbedtls_sha1_starts( &sha1 );
nexpaq	0:6c56fb4bc5f0	4734	mbedtls_sha1_update( &sha1, session->master, 48 );
nexpaq	0:6c56fb4bc5f0	4735	mbedtls_sha1_update( &sha1, padbuf , 40 );
nexpaq	0:6c56fb4bc5f0	4736	mbedtls_sha1_update( &sha1, sha1sum, 20 );
nexpaq	0:6c56fb4bc5f0	4737	mbedtls_sha1_finish( &sha1, buf + 16 );
nexpaq	0:6c56fb4bc5f0	4738
nexpaq	0:6c56fb4bc5f0	4739	MBEDTLS_SSL_DEBUG_BUF( 3, "calc finished result", buf, 36 );
nexpaq	0:6c56fb4bc5f0	4740
nexpaq	0:6c56fb4bc5f0	4741	mbedtls_md5_free( &md5 );
nexpaq	0:6c56fb4bc5f0	4742	mbedtls_sha1_free( &sha1 );
nexpaq	0:6c56fb4bc5f0	4743
nexpaq	0:6c56fb4bc5f0	4744	mbedtls_zeroize( padbuf, sizeof( padbuf ) );
nexpaq	0:6c56fb4bc5f0	4745	mbedtls_zeroize( md5sum, sizeof( md5sum ) );
nexpaq	0:6c56fb4bc5f0	4746	mbedtls_zeroize( sha1sum, sizeof( sha1sum ) );
nexpaq	0:6c56fb4bc5f0	4747
nexpaq	0:6c56fb4bc5f0	4748	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= calc finished" ) );
nexpaq	0:6c56fb4bc5f0	4749	}
nexpaq	0:6c56fb4bc5f0	4750	#endif /* MBEDTLS_SSL_PROTO_SSL3 */
nexpaq	0:6c56fb4bc5f0	4751
nexpaq	0:6c56fb4bc5f0	4752	#if defined(MBEDTLS_SSL_PROTO_TLS1) \|\| defined(MBEDTLS_SSL_PROTO_TLS1_1)
nexpaq	0:6c56fb4bc5f0	4753	static void ssl_calc_finished_tls(
nexpaq	0:6c56fb4bc5f0	4754	mbedtls_ssl_context ssl, unsigned char buf, int from )
nexpaq	0:6c56fb4bc5f0	4755	{
nexpaq	0:6c56fb4bc5f0	4756	int len = 12;
nexpaq	0:6c56fb4bc5f0	4757	const char *sender;
nexpaq	0:6c56fb4bc5f0	4758	mbedtls_md5_context md5;
nexpaq	0:6c56fb4bc5f0	4759	mbedtls_sha1_context sha1;
nexpaq	0:6c56fb4bc5f0	4760	unsigned char padbuf[36];
nexpaq	0:6c56fb4bc5f0	4761
nexpaq	0:6c56fb4bc5f0	4762	mbedtls_ssl_session *session = ssl->session_negotiate;
nexpaq	0:6c56fb4bc5f0	4763	if( !session )
nexpaq	0:6c56fb4bc5f0	4764	session = ssl->session;
nexpaq	0:6c56fb4bc5f0	4765
nexpaq	0:6c56fb4bc5f0	4766	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> calc finished tls" ) );
nexpaq	0:6c56fb4bc5f0	4767
nexpaq	0:6c56fb4bc5f0	4768	mbedtls_md5_init( &md5 );
nexpaq	0:6c56fb4bc5f0	4769	mbedtls_sha1_init( &sha1 );
nexpaq	0:6c56fb4bc5f0	4770
nexpaq	0:6c56fb4bc5f0	4771	mbedtls_md5_clone( &md5, &ssl->handshake->fin_md5 );
nexpaq	0:6c56fb4bc5f0	4772	mbedtls_sha1_clone( &sha1, &ssl->handshake->fin_sha1 );
nexpaq	0:6c56fb4bc5f0	4773
nexpaq	0:6c56fb4bc5f0	4774	/*
nexpaq	0:6c56fb4bc5f0	4775	* TLSv1:
nexpaq	0:6c56fb4bc5f0	4776	* hash = PRF( master, finished_label,
nexpaq	0:6c56fb4bc5f0	4777	* MD5( handshake ) + SHA1( handshake ) )[0..11]
nexpaq	0:6c56fb4bc5f0	4778	*/
nexpaq	0:6c56fb4bc5f0	4779
nexpaq	0:6c56fb4bc5f0	4780	#if !defined(MBEDTLS_MD5_ALT)
nexpaq	0:6c56fb4bc5f0	4781	MBEDTLS_SSL_DEBUG_BUF( 4, "finished md5 state", (unsigned char *)
nexpaq	0:6c56fb4bc5f0	4782	md5.state, sizeof( md5.state ) );
nexpaq	0:6c56fb4bc5f0	4783	#endif
nexpaq	0:6c56fb4bc5f0	4784
nexpaq	0:6c56fb4bc5f0	4785	#if !defined(MBEDTLS_SHA1_ALT)
nexpaq	0:6c56fb4bc5f0	4786	MBEDTLS_SSL_DEBUG_BUF( 4, "finished sha1 state", (unsigned char *)
nexpaq	0:6c56fb4bc5f0	4787	sha1.state, sizeof( sha1.state ) );
nexpaq	0:6c56fb4bc5f0	4788	#endif
nexpaq	0:6c56fb4bc5f0	4789
nexpaq	0:6c56fb4bc5f0	4790	sender = ( from == MBEDTLS_SSL_IS_CLIENT )
nexpaq	0:6c56fb4bc5f0	4791	? "client finished"
nexpaq	0:6c56fb4bc5f0	4792	: "server finished";
nexpaq	0:6c56fb4bc5f0	4793
nexpaq	0:6c56fb4bc5f0	4794	mbedtls_md5_finish( &md5, padbuf );
nexpaq	0:6c56fb4bc5f0	4795	mbedtls_sha1_finish( &sha1, padbuf + 16 );
nexpaq	0:6c56fb4bc5f0	4796
nexpaq	0:6c56fb4bc5f0	4797	ssl->handshake->tls_prf( session->master, 48, sender,
nexpaq	0:6c56fb4bc5f0	4798	padbuf, 36, buf, len );
nexpaq	0:6c56fb4bc5f0	4799
nexpaq	0:6c56fb4bc5f0	4800	MBEDTLS_SSL_DEBUG_BUF( 3, "calc finished result", buf, len );
nexpaq	0:6c56fb4bc5f0	4801
nexpaq	0:6c56fb4bc5f0	4802	mbedtls_md5_free( &md5 );
nexpaq	0:6c56fb4bc5f0	4803	mbedtls_sha1_free( &sha1 );
nexpaq	0:6c56fb4bc5f0	4804
nexpaq	0:6c56fb4bc5f0	4805	mbedtls_zeroize( padbuf, sizeof( padbuf ) );
nexpaq	0:6c56fb4bc5f0	4806
nexpaq	0:6c56fb4bc5f0	4807	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= calc finished" ) );
nexpaq	0:6c56fb4bc5f0	4808	}
nexpaq	0:6c56fb4bc5f0	4809	#endif /* MBEDTLS_SSL_PROTO_TLS1 \|\| MBEDTLS_SSL_PROTO_TLS1_1 */
nexpaq	0:6c56fb4bc5f0	4810
nexpaq	0:6c56fb4bc5f0	4811	#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
nexpaq	0:6c56fb4bc5f0	4812	#if defined(MBEDTLS_SHA256_C)
nexpaq	0:6c56fb4bc5f0	4813	static void ssl_calc_finished_tls_sha256(
nexpaq	0:6c56fb4bc5f0	4814	mbedtls_ssl_context ssl, unsigned char buf, int from )
nexpaq	0:6c56fb4bc5f0	4815	{
nexpaq	0:6c56fb4bc5f0	4816	int len = 12;
nexpaq	0:6c56fb4bc5f0	4817	const char *sender;
nexpaq	0:6c56fb4bc5f0	4818	mbedtls_sha256_context sha256;
nexpaq	0:6c56fb4bc5f0	4819	unsigned char padbuf[32];
nexpaq	0:6c56fb4bc5f0	4820
nexpaq	0:6c56fb4bc5f0	4821	mbedtls_ssl_session *session = ssl->session_negotiate;
nexpaq	0:6c56fb4bc5f0	4822	if( !session )
nexpaq	0:6c56fb4bc5f0	4823	session = ssl->session;
nexpaq	0:6c56fb4bc5f0	4824
nexpaq	0:6c56fb4bc5f0	4825	mbedtls_sha256_init( &sha256 );
nexpaq	0:6c56fb4bc5f0	4826
nexpaq	0:6c56fb4bc5f0	4827	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> calc finished tls sha256" ) );
nexpaq	0:6c56fb4bc5f0	4828
nexpaq	0:6c56fb4bc5f0	4829	mbedtls_sha256_clone( &sha256, &ssl->handshake->fin_sha256 );
nexpaq	0:6c56fb4bc5f0	4830
nexpaq	0:6c56fb4bc5f0	4831	/*
nexpaq	0:6c56fb4bc5f0	4832	* TLSv1.2:
nexpaq	0:6c56fb4bc5f0	4833	* hash = PRF( master, finished_label,
nexpaq	0:6c56fb4bc5f0	4834	* Hash( handshake ) )[0.11]
nexpaq	0:6c56fb4bc5f0	4835	*/
nexpaq	0:6c56fb4bc5f0	4836
nexpaq	0:6c56fb4bc5f0	4837	#if !defined(MBEDTLS_SHA256_ALT)
nexpaq	0:6c56fb4bc5f0	4838	MBEDTLS_SSL_DEBUG_BUF( 4, "finished sha2 state", (unsigned char *)
nexpaq	0:6c56fb4bc5f0	4839	sha256.state, sizeof( sha256.state ) );
nexpaq	0:6c56fb4bc5f0	4840	#endif
nexpaq	0:6c56fb4bc5f0	4841
nexpaq	0:6c56fb4bc5f0	4842	sender = ( from == MBEDTLS_SSL_IS_CLIENT )
nexpaq	0:6c56fb4bc5f0	4843	? "client finished"
nexpaq	0:6c56fb4bc5f0	4844	: "server finished";
nexpaq	0:6c56fb4bc5f0	4845
nexpaq	0:6c56fb4bc5f0	4846	mbedtls_sha256_finish( &sha256, padbuf );
nexpaq	0:6c56fb4bc5f0	4847
nexpaq	0:6c56fb4bc5f0	4848	ssl->handshake->tls_prf( session->master, 48, sender,
nexpaq	0:6c56fb4bc5f0	4849	padbuf, 32, buf, len );
nexpaq	0:6c56fb4bc5f0	4850
nexpaq	0:6c56fb4bc5f0	4851	MBEDTLS_SSL_DEBUG_BUF( 3, "calc finished result", buf, len );
nexpaq	0:6c56fb4bc5f0	4852
nexpaq	0:6c56fb4bc5f0	4853	mbedtls_sha256_free( &sha256 );
nexpaq	0:6c56fb4bc5f0	4854
nexpaq	0:6c56fb4bc5f0	4855	mbedtls_zeroize( padbuf, sizeof( padbuf ) );
nexpaq	0:6c56fb4bc5f0	4856
nexpaq	0:6c56fb4bc5f0	4857	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= calc finished" ) );
nexpaq	0:6c56fb4bc5f0	4858	}
nexpaq	0:6c56fb4bc5f0	4859	#endif /* MBEDTLS_SHA256_C */
nexpaq	0:6c56fb4bc5f0	4860
nexpaq	0:6c56fb4bc5f0	4861	#if defined(MBEDTLS_SHA512_C)
nexpaq	0:6c56fb4bc5f0	4862	static void ssl_calc_finished_tls_sha384(
nexpaq	0:6c56fb4bc5f0	4863	mbedtls_ssl_context ssl, unsigned char buf, int from )
nexpaq	0:6c56fb4bc5f0	4864	{
nexpaq	0:6c56fb4bc5f0	4865	int len = 12;
nexpaq	0:6c56fb4bc5f0	4866	const char *sender;
nexpaq	0:6c56fb4bc5f0	4867	mbedtls_sha512_context sha512;
nexpaq	0:6c56fb4bc5f0	4868	unsigned char padbuf[48];
nexpaq	0:6c56fb4bc5f0	4869
nexpaq	0:6c56fb4bc5f0	4870	mbedtls_ssl_session *session = ssl->session_negotiate;
nexpaq	0:6c56fb4bc5f0	4871	if( !session )
nexpaq	0:6c56fb4bc5f0	4872	session = ssl->session;
nexpaq	0:6c56fb4bc5f0	4873
nexpaq	0:6c56fb4bc5f0	4874	mbedtls_sha512_init( &sha512 );
nexpaq	0:6c56fb4bc5f0	4875
nexpaq	0:6c56fb4bc5f0	4876	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> calc finished tls sha384" ) );
nexpaq	0:6c56fb4bc5f0	4877
nexpaq	0:6c56fb4bc5f0	4878	mbedtls_sha512_clone( &sha512, &ssl->handshake->fin_sha512 );
nexpaq	0:6c56fb4bc5f0	4879
nexpaq	0:6c56fb4bc5f0	4880	/*
nexpaq	0:6c56fb4bc5f0	4881	* TLSv1.2:
nexpaq	0:6c56fb4bc5f0	4882	* hash = PRF( master, finished_label,
nexpaq	0:6c56fb4bc5f0	4883	* Hash( handshake ) )[0.11]
nexpaq	0:6c56fb4bc5f0	4884	*/
nexpaq	0:6c56fb4bc5f0	4885
nexpaq	0:6c56fb4bc5f0	4886	#if !defined(MBEDTLS_SHA512_ALT)
nexpaq	0:6c56fb4bc5f0	4887	MBEDTLS_SSL_DEBUG_BUF( 4, "finished sha512 state", (unsigned char *)
nexpaq	0:6c56fb4bc5f0	4888	sha512.state, sizeof( sha512.state ) );
nexpaq	0:6c56fb4bc5f0	4889	#endif
nexpaq	0:6c56fb4bc5f0	4890
nexpaq	0:6c56fb4bc5f0	4891	sender = ( from == MBEDTLS_SSL_IS_CLIENT )
nexpaq	0:6c56fb4bc5f0	4892	? "client finished"
nexpaq	0:6c56fb4bc5f0	4893	: "server finished";
nexpaq	0:6c56fb4bc5f0	4894
nexpaq	0:6c56fb4bc5f0	4895	mbedtls_sha512_finish( &sha512, padbuf );
nexpaq	0:6c56fb4bc5f0	4896
nexpaq	0:6c56fb4bc5f0	4897	ssl->handshake->tls_prf( session->master, 48, sender,
nexpaq	0:6c56fb4bc5f0	4898	padbuf, 48, buf, len );
nexpaq	0:6c56fb4bc5f0	4899
nexpaq	0:6c56fb4bc5f0	4900	MBEDTLS_SSL_DEBUG_BUF( 3, "calc finished result", buf, len );
nexpaq	0:6c56fb4bc5f0	4901
nexpaq	0:6c56fb4bc5f0	4902	mbedtls_sha512_free( &sha512 );
nexpaq	0:6c56fb4bc5f0	4903
nexpaq	0:6c56fb4bc5f0	4904	mbedtls_zeroize( padbuf, sizeof( padbuf ) );
nexpaq	0:6c56fb4bc5f0	4905
nexpaq	0:6c56fb4bc5f0	4906	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= calc finished" ) );
nexpaq	0:6c56fb4bc5f0	4907	}
nexpaq	0:6c56fb4bc5f0	4908	#endif /* MBEDTLS_SHA512_C */
nexpaq	0:6c56fb4bc5f0	4909	#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
nexpaq	0:6c56fb4bc5f0	4910
nexpaq	0:6c56fb4bc5f0	4911	static void ssl_handshake_wrapup_free_hs_transform( mbedtls_ssl_context *ssl )
nexpaq	0:6c56fb4bc5f0	4912	{
nexpaq	0:6c56fb4bc5f0	4913	MBEDTLS_SSL_DEBUG_MSG( 3, ( "=> handshake wrapup: final free" ) );
nexpaq	0:6c56fb4bc5f0	4914
nexpaq	0:6c56fb4bc5f0	4915	/*
nexpaq	0:6c56fb4bc5f0	4916	* Free our handshake params
nexpaq	0:6c56fb4bc5f0	4917	*/
nexpaq	0:6c56fb4bc5f0	4918	mbedtls_ssl_handshake_free( ssl->handshake );
nexpaq	0:6c56fb4bc5f0	4919	mbedtls_free( ssl->handshake );
nexpaq	0:6c56fb4bc5f0	4920	ssl->handshake = NULL;
nexpaq	0:6c56fb4bc5f0	4921
nexpaq	0:6c56fb4bc5f0	4922	/*
nexpaq	0:6c56fb4bc5f0	4923	* Free the previous transform and swith in the current one
nexpaq	0:6c56fb4bc5f0	4924	*/
nexpaq	0:6c56fb4bc5f0	4925	if( ssl->transform )
nexpaq	0:6c56fb4bc5f0	4926	{
nexpaq	0:6c56fb4bc5f0	4927	mbedtls_ssl_transform_free( ssl->transform );
nexpaq	0:6c56fb4bc5f0	4928	mbedtls_free( ssl->transform );
nexpaq	0:6c56fb4bc5f0	4929	}
nexpaq	0:6c56fb4bc5f0	4930	ssl->transform = ssl->transform_negotiate;
nexpaq	0:6c56fb4bc5f0	4931	ssl->transform_negotiate = NULL;
nexpaq	0:6c56fb4bc5f0	4932
nexpaq	0:6c56fb4bc5f0	4933	MBEDTLS_SSL_DEBUG_MSG( 3, ( "<= handshake wrapup: final free" ) );
nexpaq	0:6c56fb4bc5f0	4934	}
nexpaq	0:6c56fb4bc5f0	4935
nexpaq	0:6c56fb4bc5f0	4936	void mbedtls_ssl_handshake_wrapup( mbedtls_ssl_context *ssl )
nexpaq	0:6c56fb4bc5f0	4937	{
nexpaq	0:6c56fb4bc5f0	4938	int resume = ssl->handshake->resume;
nexpaq	0:6c56fb4bc5f0	4939
nexpaq	0:6c56fb4bc5f0	4940	MBEDTLS_SSL_DEBUG_MSG( 3, ( "=> handshake wrapup" ) );
nexpaq	0:6c56fb4bc5f0	4941
nexpaq	0:6c56fb4bc5f0	4942	#if defined(MBEDTLS_SSL_RENEGOTIATION)
nexpaq	0:6c56fb4bc5f0	4943	if( ssl->renego_status == MBEDTLS_SSL_RENEGOTIATION_IN_PROGRESS )
nexpaq	0:6c56fb4bc5f0	4944	{
nexpaq	0:6c56fb4bc5f0	4945	ssl->renego_status = MBEDTLS_SSL_RENEGOTIATION_DONE;
nexpaq	0:6c56fb4bc5f0	4946	ssl->renego_records_seen = 0;
nexpaq	0:6c56fb4bc5f0	4947	}
nexpaq	0:6c56fb4bc5f0	4948	#endif
nexpaq	0:6c56fb4bc5f0	4949
nexpaq	0:6c56fb4bc5f0	4950	/*
nexpaq	0:6c56fb4bc5f0	4951	* Free the previous session and switch in the current one
nexpaq	0:6c56fb4bc5f0	4952	*/
nexpaq	0:6c56fb4bc5f0	4953	if( ssl->session )
nexpaq	0:6c56fb4bc5f0	4954	{
nexpaq	0:6c56fb4bc5f0	4955	#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
nexpaq	0:6c56fb4bc5f0	4956	/* RFC 7366 3.1: keep the EtM state */
nexpaq	0:6c56fb4bc5f0	4957	ssl->session_negotiate->encrypt_then_mac =
nexpaq	0:6c56fb4bc5f0	4958	ssl->session->encrypt_then_mac;
nexpaq	0:6c56fb4bc5f0	4959	#endif
nexpaq	0:6c56fb4bc5f0	4960
nexpaq	0:6c56fb4bc5f0	4961	mbedtls_ssl_session_free( ssl->session );
nexpaq	0:6c56fb4bc5f0	4962	mbedtls_free( ssl->session );
nexpaq	0:6c56fb4bc5f0	4963	}
nexpaq	0:6c56fb4bc5f0	4964	ssl->session = ssl->session_negotiate;
nexpaq	0:6c56fb4bc5f0	4965	ssl->session_negotiate = NULL;
nexpaq	0:6c56fb4bc5f0	4966
nexpaq	0:6c56fb4bc5f0	4967	/*
nexpaq	0:6c56fb4bc5f0	4968	* Add cache entry
nexpaq	0:6c56fb4bc5f0	4969	*/
nexpaq	0:6c56fb4bc5f0	4970	if( ssl->conf->f_set_cache != NULL &&
nexpaq	0:6c56fb4bc5f0	4971	ssl->session->id_len != 0 &&
nexpaq	0:6c56fb4bc5f0	4972	resume == 0 )
nexpaq	0:6c56fb4bc5f0	4973	{
nexpaq	0:6c56fb4bc5f0	4974	if( ssl->conf->f_set_cache( ssl->conf->p_cache, ssl->session ) != 0 )
nexpaq	0:6c56fb4bc5f0	4975	MBEDTLS_SSL_DEBUG_MSG( 1, ( "cache did not store session" ) );
nexpaq	0:6c56fb4bc5f0	4976	}
nexpaq	0:6c56fb4bc5f0	4977
nexpaq	0:6c56fb4bc5f0	4978	#if defined(MBEDTLS_SSL_PROTO_DTLS)
nexpaq	0:6c56fb4bc5f0	4979	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM &&
nexpaq	0:6c56fb4bc5f0	4980	ssl->handshake->flight != NULL )
nexpaq	0:6c56fb4bc5f0	4981	{
nexpaq	0:6c56fb4bc5f0	4982	/* Cancel handshake timer */
nexpaq	0:6c56fb4bc5f0	4983	ssl_set_timer( ssl, 0 );
nexpaq	0:6c56fb4bc5f0	4984
nexpaq	0:6c56fb4bc5f0	4985	/* Keep last flight around in case we need to resend it:
nexpaq	0:6c56fb4bc5f0	4986	* we need the handshake and transform structures for that */
nexpaq	0:6c56fb4bc5f0	4987	MBEDTLS_SSL_DEBUG_MSG( 3, ( "skip freeing handshake and transform" ) );
nexpaq	0:6c56fb4bc5f0	4988	}
nexpaq	0:6c56fb4bc5f0	4989	else
nexpaq	0:6c56fb4bc5f0	4990	#endif
nexpaq	0:6c56fb4bc5f0	4991	ssl_handshake_wrapup_free_hs_transform( ssl );
nexpaq	0:6c56fb4bc5f0	4992
nexpaq	0:6c56fb4bc5f0	4993	ssl->state++;
nexpaq	0:6c56fb4bc5f0	4994
nexpaq	0:6c56fb4bc5f0	4995	MBEDTLS_SSL_DEBUG_MSG( 3, ( "<= handshake wrapup" ) );
nexpaq	0:6c56fb4bc5f0	4996	}
nexpaq	0:6c56fb4bc5f0	4997
nexpaq	0:6c56fb4bc5f0	4998	int mbedtls_ssl_write_finished( mbedtls_ssl_context *ssl )
nexpaq	0:6c56fb4bc5f0	4999	{
nexpaq	0:6c56fb4bc5f0	5000	int ret, hash_len;
nexpaq	0:6c56fb4bc5f0	5001
nexpaq	0:6c56fb4bc5f0	5002	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write finished" ) );
nexpaq	0:6c56fb4bc5f0	5003
nexpaq	0:6c56fb4bc5f0	5004	/*
nexpaq	0:6c56fb4bc5f0	5005	* Set the out_msg pointer to the correct location based on IV length
nexpaq	0:6c56fb4bc5f0	5006	*/
nexpaq	0:6c56fb4bc5f0	5007	if( ssl->minor_ver >= MBEDTLS_SSL_MINOR_VERSION_2 )
nexpaq	0:6c56fb4bc5f0	5008	{
nexpaq	0:6c56fb4bc5f0	5009	ssl->out_msg = ssl->out_iv + ssl->transform_negotiate->ivlen -
nexpaq	0:6c56fb4bc5f0	5010	ssl->transform_negotiate->fixed_ivlen;
nexpaq	0:6c56fb4bc5f0	5011	}
nexpaq	0:6c56fb4bc5f0	5012	else
nexpaq	0:6c56fb4bc5f0	5013	ssl->out_msg = ssl->out_iv;
nexpaq	0:6c56fb4bc5f0	5014
nexpaq	0:6c56fb4bc5f0	5015	ssl->handshake->calc_finished( ssl, ssl->out_msg + 4, ssl->conf->endpoint );
nexpaq	0:6c56fb4bc5f0	5016
nexpaq	0:6c56fb4bc5f0	5017	/*
nexpaq	0:6c56fb4bc5f0	5018	* RFC 5246 7.4.9 (Page 63) says 12 is the default length and ciphersuites
nexpaq	0:6c56fb4bc5f0	5019	* may define some other value. Currently (early 2016), no defined
nexpaq	0:6c56fb4bc5f0	5020	* ciphersuite does this (and this is unlikely to change as activity has
nexpaq	0:6c56fb4bc5f0	5021	* moved to TLS 1.3 now) so we can keep the hardcoded 12 here.
nexpaq	0:6c56fb4bc5f0	5022	*/
nexpaq	0:6c56fb4bc5f0	5023	hash_len = ( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 ) ? 36 : 12;
nexpaq	0:6c56fb4bc5f0	5024
nexpaq	0:6c56fb4bc5f0	5025	#if defined(MBEDTLS_SSL_RENEGOTIATION)
nexpaq	0:6c56fb4bc5f0	5026	ssl->verify_data_len = hash_len;
nexpaq	0:6c56fb4bc5f0	5027	memcpy( ssl->own_verify_data, ssl->out_msg + 4, hash_len );
nexpaq	0:6c56fb4bc5f0	5028	#endif
nexpaq	0:6c56fb4bc5f0	5029
nexpaq	0:6c56fb4bc5f0	5030	ssl->out_msglen = 4 + hash_len;
nexpaq	0:6c56fb4bc5f0	5031	ssl->out_msgtype = MBEDTLS_SSL_MSG_HANDSHAKE;
nexpaq	0:6c56fb4bc5f0	5032	ssl->out_msg[0] = MBEDTLS_SSL_HS_FINISHED;
nexpaq	0:6c56fb4bc5f0	5033
nexpaq	0:6c56fb4bc5f0	5034	/*
nexpaq	0:6c56fb4bc5f0	5035	* In case of session resuming, invert the client and server
nexpaq	0:6c56fb4bc5f0	5036	* ChangeCipherSpec messages order.
nexpaq	0:6c56fb4bc5f0	5037	*/
nexpaq	0:6c56fb4bc5f0	5038	if( ssl->handshake->resume != 0 )
nexpaq	0:6c56fb4bc5f0	5039	{
nexpaq	0:6c56fb4bc5f0	5040	#if defined(MBEDTLS_SSL_CLI_C)
nexpaq	0:6c56fb4bc5f0	5041	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_CLIENT )
nexpaq	0:6c56fb4bc5f0	5042	ssl->state = MBEDTLS_SSL_HANDSHAKE_WRAPUP;
nexpaq	0:6c56fb4bc5f0	5043	#endif
nexpaq	0:6c56fb4bc5f0	5044	#if defined(MBEDTLS_SSL_SRV_C)
nexpaq	0:6c56fb4bc5f0	5045	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER )
nexpaq	0:6c56fb4bc5f0	5046	ssl->state = MBEDTLS_SSL_CLIENT_CHANGE_CIPHER_SPEC;
nexpaq	0:6c56fb4bc5f0	5047	#endif
nexpaq	0:6c56fb4bc5f0	5048	}
nexpaq	0:6c56fb4bc5f0	5049	else
nexpaq	0:6c56fb4bc5f0	5050	ssl->state++;
nexpaq	0:6c56fb4bc5f0	5051
nexpaq	0:6c56fb4bc5f0	5052	/*
nexpaq	0:6c56fb4bc5f0	5053	* Switch to our negotiated transform and session parameters for outbound
nexpaq	0:6c56fb4bc5f0	5054	* data.
nexpaq	0:6c56fb4bc5f0	5055	*/
nexpaq	0:6c56fb4bc5f0	5056	MBEDTLS_SSL_DEBUG_MSG( 3, ( "switching to new transform spec for outbound data" ) );
nexpaq	0:6c56fb4bc5f0	5057
nexpaq	0:6c56fb4bc5f0	5058	#if defined(MBEDTLS_SSL_PROTO_DTLS)
nexpaq	0:6c56fb4bc5f0	5059	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
nexpaq	0:6c56fb4bc5f0	5060	{
nexpaq	0:6c56fb4bc5f0	5061	unsigned char i;
nexpaq	0:6c56fb4bc5f0	5062
nexpaq	0:6c56fb4bc5f0	5063	/* Remember current epoch settings for resending */
nexpaq	0:6c56fb4bc5f0	5064	ssl->handshake->alt_transform_out = ssl->transform_out;
nexpaq	0:6c56fb4bc5f0	5065	memcpy( ssl->handshake->alt_out_ctr, ssl->out_ctr, 8 );
nexpaq	0:6c56fb4bc5f0	5066
nexpaq	0:6c56fb4bc5f0	5067	/* Set sequence_number to zero */
nexpaq	0:6c56fb4bc5f0	5068	memset( ssl->out_ctr + 2, 0, 6 );
nexpaq	0:6c56fb4bc5f0	5069
nexpaq	0:6c56fb4bc5f0	5070	/* Increment epoch */
nexpaq	0:6c56fb4bc5f0	5071	for( i = 2; i > 0; i-- )
nexpaq	0:6c56fb4bc5f0	5072	if( ++ssl->out_ctr[i - 1] != 0 )
nexpaq	0:6c56fb4bc5f0	5073	break;
nexpaq	0:6c56fb4bc5f0	5074
nexpaq	0:6c56fb4bc5f0	5075	/* The loop goes to its end iff the counter is wrapping */
nexpaq	0:6c56fb4bc5f0	5076	if( i == 0 )
nexpaq	0:6c56fb4bc5f0	5077	{
nexpaq	0:6c56fb4bc5f0	5078	MBEDTLS_SSL_DEBUG_MSG( 1, ( "DTLS epoch would wrap" ) );
nexpaq	0:6c56fb4bc5f0	5079	return( MBEDTLS_ERR_SSL_COUNTER_WRAPPING );
nexpaq	0:6c56fb4bc5f0	5080	}
nexpaq	0:6c56fb4bc5f0	5081	}
nexpaq	0:6c56fb4bc5f0	5082	else
nexpaq	0:6c56fb4bc5f0	5083	#endif /* MBEDTLS_SSL_PROTO_DTLS */
nexpaq	0:6c56fb4bc5f0	5084	memset( ssl->out_ctr, 0, 8 );
nexpaq	0:6c56fb4bc5f0	5085
nexpaq	0:6c56fb4bc5f0	5086	ssl->transform_out = ssl->transform_negotiate;
nexpaq	0:6c56fb4bc5f0	5087	ssl->session_out = ssl->session_negotiate;
nexpaq	0:6c56fb4bc5f0	5088
nexpaq	0:6c56fb4bc5f0	5089	#if defined(MBEDTLS_SSL_HW_RECORD_ACCEL)
nexpaq	0:6c56fb4bc5f0	5090	if( mbedtls_ssl_hw_record_activate != NULL )
nexpaq	0:6c56fb4bc5f0	5091	{
nexpaq	0:6c56fb4bc5f0	5092	if( ( ret = mbedtls_ssl_hw_record_activate( ssl, MBEDTLS_SSL_CHANNEL_OUTBOUND ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	5093	{
nexpaq	0:6c56fb4bc5f0	5094	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_hw_record_activate", ret );
nexpaq	0:6c56fb4bc5f0	5095	return( MBEDTLS_ERR_SSL_HW_ACCEL_FAILED );
nexpaq	0:6c56fb4bc5f0	5096	}
nexpaq	0:6c56fb4bc5f0	5097	}
nexpaq	0:6c56fb4bc5f0	5098	#endif
nexpaq	0:6c56fb4bc5f0	5099
nexpaq	0:6c56fb4bc5f0	5100	#if defined(MBEDTLS_SSL_PROTO_DTLS)
nexpaq	0:6c56fb4bc5f0	5101	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
nexpaq	0:6c56fb4bc5f0	5102	mbedtls_ssl_send_flight_completed( ssl );
nexpaq	0:6c56fb4bc5f0	5103	#endif
nexpaq	0:6c56fb4bc5f0	5104
nexpaq	0:6c56fb4bc5f0	5105	if( ( ret = mbedtls_ssl_write_record( ssl ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	5106	{
nexpaq	0:6c56fb4bc5f0	5107	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_write_record", ret );
nexpaq	0:6c56fb4bc5f0	5108	return( ret );
nexpaq	0:6c56fb4bc5f0	5109	}
nexpaq	0:6c56fb4bc5f0	5110
nexpaq	0:6c56fb4bc5f0	5111	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= write finished" ) );
nexpaq	0:6c56fb4bc5f0	5112
nexpaq	0:6c56fb4bc5f0	5113	return( 0 );
nexpaq	0:6c56fb4bc5f0	5114	}
nexpaq	0:6c56fb4bc5f0	5115
nexpaq	0:6c56fb4bc5f0	5116	#if defined(MBEDTLS_SSL_PROTO_SSL3)
nexpaq	0:6c56fb4bc5f0	5117	#define SSL_MAX_HASH_LEN 36
nexpaq	0:6c56fb4bc5f0	5118	#else
nexpaq	0:6c56fb4bc5f0	5119	#define SSL_MAX_HASH_LEN 12
nexpaq	0:6c56fb4bc5f0	5120	#endif
nexpaq	0:6c56fb4bc5f0	5121
nexpaq	0:6c56fb4bc5f0	5122	int mbedtls_ssl_parse_finished( mbedtls_ssl_context *ssl )
nexpaq	0:6c56fb4bc5f0	5123	{
nexpaq	0:6c56fb4bc5f0	5124	int ret;
nexpaq	0:6c56fb4bc5f0	5125	unsigned int hash_len;
nexpaq	0:6c56fb4bc5f0	5126	unsigned char buf[SSL_MAX_HASH_LEN];
nexpaq	0:6c56fb4bc5f0	5127
nexpaq	0:6c56fb4bc5f0	5128	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> parse finished" ) );
nexpaq	0:6c56fb4bc5f0	5129
nexpaq	0:6c56fb4bc5f0	5130	ssl->handshake->calc_finished( ssl, buf, ssl->conf->endpoint ^ 1 );
nexpaq	0:6c56fb4bc5f0	5131
nexpaq	0:6c56fb4bc5f0	5132	if( ( ret = mbedtls_ssl_read_record( ssl ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	5133	{
nexpaq	0:6c56fb4bc5f0	5134	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_read_record", ret );
nexpaq	0:6c56fb4bc5f0	5135	return( ret );
nexpaq	0:6c56fb4bc5f0	5136	}
nexpaq	0:6c56fb4bc5f0	5137
nexpaq	0:6c56fb4bc5f0	5138	if( ssl->in_msgtype != MBEDTLS_SSL_MSG_HANDSHAKE )
nexpaq	0:6c56fb4bc5f0	5139	{
nexpaq	0:6c56fb4bc5f0	5140	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad finished message" ) );
nexpaq	0:6c56fb4bc5f0	5141	return( MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE );
nexpaq	0:6c56fb4bc5f0	5142	}
nexpaq	0:6c56fb4bc5f0	5143
nexpaq	0:6c56fb4bc5f0	5144	/* There is currently no ciphersuite using another length with TLS 1.2 */
nexpaq	0:6c56fb4bc5f0	5145	#if defined(MBEDTLS_SSL_PROTO_SSL3)
nexpaq	0:6c56fb4bc5f0	5146	if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 )
nexpaq	0:6c56fb4bc5f0	5147	hash_len = 36;
nexpaq	0:6c56fb4bc5f0	5148	else
nexpaq	0:6c56fb4bc5f0	5149	#endif
nexpaq	0:6c56fb4bc5f0	5150	hash_len = 12;
nexpaq	0:6c56fb4bc5f0	5151
nexpaq	0:6c56fb4bc5f0	5152	if( ssl->in_msg[0] != MBEDTLS_SSL_HS_FINISHED \|\|
nexpaq	0:6c56fb4bc5f0	5153	ssl->in_hslen != mbedtls_ssl_hs_hdr_len( ssl ) + hash_len )
nexpaq	0:6c56fb4bc5f0	5154	{
nexpaq	0:6c56fb4bc5f0	5155	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad finished message" ) );
nexpaq	0:6c56fb4bc5f0	5156	return( MBEDTLS_ERR_SSL_BAD_HS_FINISHED );
nexpaq	0:6c56fb4bc5f0	5157	}
nexpaq	0:6c56fb4bc5f0	5158
nexpaq	0:6c56fb4bc5f0	5159	if( mbedtls_ssl_safer_memcmp( ssl->in_msg + mbedtls_ssl_hs_hdr_len( ssl ),
nexpaq	0:6c56fb4bc5f0	5160	buf, hash_len ) != 0 )
nexpaq	0:6c56fb4bc5f0	5161	{
nexpaq	0:6c56fb4bc5f0	5162	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad finished message" ) );
nexpaq	0:6c56fb4bc5f0	5163	return( MBEDTLS_ERR_SSL_BAD_HS_FINISHED );
nexpaq	0:6c56fb4bc5f0	5164	}
nexpaq	0:6c56fb4bc5f0	5165
nexpaq	0:6c56fb4bc5f0	5166	#if defined(MBEDTLS_SSL_RENEGOTIATION)
nexpaq	0:6c56fb4bc5f0	5167	ssl->verify_data_len = hash_len;
nexpaq	0:6c56fb4bc5f0	5168	memcpy( ssl->peer_verify_data, buf, hash_len );
nexpaq	0:6c56fb4bc5f0	5169	#endif
nexpaq	0:6c56fb4bc5f0	5170
nexpaq	0:6c56fb4bc5f0	5171	if( ssl->handshake->resume != 0 )
nexpaq	0:6c56fb4bc5f0	5172	{
nexpaq	0:6c56fb4bc5f0	5173	#if defined(MBEDTLS_SSL_CLI_C)
nexpaq	0:6c56fb4bc5f0	5174	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_CLIENT )
nexpaq	0:6c56fb4bc5f0	5175	ssl->state = MBEDTLS_SSL_CLIENT_CHANGE_CIPHER_SPEC;
nexpaq	0:6c56fb4bc5f0	5176	#endif
nexpaq	0:6c56fb4bc5f0	5177	#if defined(MBEDTLS_SSL_SRV_C)
nexpaq	0:6c56fb4bc5f0	5178	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER )
nexpaq	0:6c56fb4bc5f0	5179	ssl->state = MBEDTLS_SSL_HANDSHAKE_WRAPUP;
nexpaq	0:6c56fb4bc5f0	5180	#endif
nexpaq	0:6c56fb4bc5f0	5181	}
nexpaq	0:6c56fb4bc5f0	5182	else
nexpaq	0:6c56fb4bc5f0	5183	ssl->state++;
nexpaq	0:6c56fb4bc5f0	5184
nexpaq	0:6c56fb4bc5f0	5185	#if defined(MBEDTLS_SSL_PROTO_DTLS)
nexpaq	0:6c56fb4bc5f0	5186	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
nexpaq	0:6c56fb4bc5f0	5187	mbedtls_ssl_recv_flight_completed( ssl );
nexpaq	0:6c56fb4bc5f0	5188	#endif
nexpaq	0:6c56fb4bc5f0	5189
nexpaq	0:6c56fb4bc5f0	5190	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= parse finished" ) );
nexpaq	0:6c56fb4bc5f0	5191
nexpaq	0:6c56fb4bc5f0	5192	return( 0 );
nexpaq	0:6c56fb4bc5f0	5193	}
nexpaq	0:6c56fb4bc5f0	5194
nexpaq	0:6c56fb4bc5f0	5195	static void ssl_handshake_params_init( mbedtls_ssl_handshake_params *handshake )
nexpaq	0:6c56fb4bc5f0	5196	{
nexpaq	0:6c56fb4bc5f0	5197	memset( handshake, 0, sizeof( mbedtls_ssl_handshake_params ) );
nexpaq	0:6c56fb4bc5f0	5198
nexpaq	0:6c56fb4bc5f0	5199	#if defined(MBEDTLS_SSL_PROTO_SSL3) \|\| defined(MBEDTLS_SSL_PROTO_TLS1) \|\| \
nexpaq	0:6c56fb4bc5f0	5200	defined(MBEDTLS_SSL_PROTO_TLS1_1)
nexpaq	0:6c56fb4bc5f0	5201	mbedtls_md5_init( &handshake->fin_md5 );
nexpaq	0:6c56fb4bc5f0	5202	mbedtls_sha1_init( &handshake->fin_sha1 );
nexpaq	0:6c56fb4bc5f0	5203	mbedtls_md5_starts( &handshake->fin_md5 );
nexpaq	0:6c56fb4bc5f0	5204	mbedtls_sha1_starts( &handshake->fin_sha1 );
nexpaq	0:6c56fb4bc5f0	5205	#endif
nexpaq	0:6c56fb4bc5f0	5206	#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
nexpaq	0:6c56fb4bc5f0	5207	#if defined(MBEDTLS_SHA256_C)
nexpaq	0:6c56fb4bc5f0	5208	mbedtls_sha256_init( &handshake->fin_sha256 );
nexpaq	0:6c56fb4bc5f0	5209	mbedtls_sha256_starts( &handshake->fin_sha256, 0 );
nexpaq	0:6c56fb4bc5f0	5210	#endif
nexpaq	0:6c56fb4bc5f0	5211	#if defined(MBEDTLS_SHA512_C)
nexpaq	0:6c56fb4bc5f0	5212	mbedtls_sha512_init( &handshake->fin_sha512 );
nexpaq	0:6c56fb4bc5f0	5213	mbedtls_sha512_starts( &handshake->fin_sha512, 1 );
nexpaq	0:6c56fb4bc5f0	5214	#endif
nexpaq	0:6c56fb4bc5f0	5215	#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
nexpaq	0:6c56fb4bc5f0	5216
nexpaq	0:6c56fb4bc5f0	5217	handshake->update_checksum = ssl_update_checksum_start;
nexpaq	0:6c56fb4bc5f0	5218	handshake->sig_alg = MBEDTLS_SSL_HASH_SHA1;
nexpaq	0:6c56fb4bc5f0	5219
nexpaq	0:6c56fb4bc5f0	5220	#if defined(MBEDTLS_DHM_C)
nexpaq	0:6c56fb4bc5f0	5221	mbedtls_dhm_init( &handshake->dhm_ctx );
nexpaq	0:6c56fb4bc5f0	5222	#endif
nexpaq	0:6c56fb4bc5f0	5223	#if defined(MBEDTLS_ECDH_C)
nexpaq	0:6c56fb4bc5f0	5224	mbedtls_ecdh_init( &handshake->ecdh_ctx );
nexpaq	0:6c56fb4bc5f0	5225	#endif
nexpaq	0:6c56fb4bc5f0	5226	#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
nexpaq	0:6c56fb4bc5f0	5227	mbedtls_ecjpake_init( &handshake->ecjpake_ctx );
nexpaq	0:6c56fb4bc5f0	5228	#if defined(MBEDTLS_SSL_CLI_C)
nexpaq	0:6c56fb4bc5f0	5229	handshake->ecjpake_cache = NULL;
nexpaq	0:6c56fb4bc5f0	5230	handshake->ecjpake_cache_len = 0;
nexpaq	0:6c56fb4bc5f0	5231	#endif
nexpaq	0:6c56fb4bc5f0	5232	#endif
nexpaq	0:6c56fb4bc5f0	5233
nexpaq	0:6c56fb4bc5f0	5234	#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
nexpaq	0:6c56fb4bc5f0	5235	handshake->sni_authmode = MBEDTLS_SSL_VERIFY_UNSET;
nexpaq	0:6c56fb4bc5f0	5236	#endif
nexpaq	0:6c56fb4bc5f0	5237	}
nexpaq	0:6c56fb4bc5f0	5238
nexpaq	0:6c56fb4bc5f0	5239	static void ssl_transform_init( mbedtls_ssl_transform *transform )
nexpaq	0:6c56fb4bc5f0	5240	{
nexpaq	0:6c56fb4bc5f0	5241	memset( transform, 0, sizeof(mbedtls_ssl_transform) );
nexpaq	0:6c56fb4bc5f0	5242
nexpaq	0:6c56fb4bc5f0	5243	mbedtls_cipher_init( &transform->cipher_ctx_enc );
nexpaq	0:6c56fb4bc5f0	5244	mbedtls_cipher_init( &transform->cipher_ctx_dec );
nexpaq	0:6c56fb4bc5f0	5245
nexpaq	0:6c56fb4bc5f0	5246	mbedtls_md_init( &transform->md_ctx_enc );
nexpaq	0:6c56fb4bc5f0	5247	mbedtls_md_init( &transform->md_ctx_dec );
nexpaq	0:6c56fb4bc5f0	5248	}
nexpaq	0:6c56fb4bc5f0	5249
nexpaq	0:6c56fb4bc5f0	5250	void mbedtls_ssl_session_init( mbedtls_ssl_session *session )
nexpaq	0:6c56fb4bc5f0	5251	{
nexpaq	0:6c56fb4bc5f0	5252	memset( session, 0, sizeof(mbedtls_ssl_session) );
nexpaq	0:6c56fb4bc5f0	5253	}
nexpaq	0:6c56fb4bc5f0	5254
nexpaq	0:6c56fb4bc5f0	5255	static int ssl_handshake_init( mbedtls_ssl_context *ssl )
nexpaq	0:6c56fb4bc5f0	5256	{
nexpaq	0:6c56fb4bc5f0	5257	/* Clear old handshake information if present */
nexpaq	0:6c56fb4bc5f0	5258	if( ssl->transform_negotiate )
nexpaq	0:6c56fb4bc5f0	5259	mbedtls_ssl_transform_free( ssl->transform_negotiate );
nexpaq	0:6c56fb4bc5f0	5260	if( ssl->session_negotiate )
nexpaq	0:6c56fb4bc5f0	5261	mbedtls_ssl_session_free( ssl->session_negotiate );
nexpaq	0:6c56fb4bc5f0	5262	if( ssl->handshake )
nexpaq	0:6c56fb4bc5f0	5263	mbedtls_ssl_handshake_free( ssl->handshake );
nexpaq	0:6c56fb4bc5f0	5264
nexpaq	0:6c56fb4bc5f0	5265	/*
nexpaq	0:6c56fb4bc5f0	5266	* Either the pointers are now NULL or cleared properly and can be freed.
nexpaq	0:6c56fb4bc5f0	5267	* Now allocate missing structures.
nexpaq	0:6c56fb4bc5f0	5268	*/
nexpaq	0:6c56fb4bc5f0	5269	if( ssl->transform_negotiate == NULL )
nexpaq	0:6c56fb4bc5f0	5270	{
nexpaq	0:6c56fb4bc5f0	5271	ssl->transform_negotiate = mbedtls_calloc( 1, sizeof(mbedtls_ssl_transform) );
nexpaq	0:6c56fb4bc5f0	5272	}
nexpaq	0:6c56fb4bc5f0	5273
nexpaq	0:6c56fb4bc5f0	5274	if( ssl->session_negotiate == NULL )
nexpaq	0:6c56fb4bc5f0	5275	{
nexpaq	0:6c56fb4bc5f0	5276	ssl->session_negotiate = mbedtls_calloc( 1, sizeof(mbedtls_ssl_session) );
nexpaq	0:6c56fb4bc5f0	5277	}
nexpaq	0:6c56fb4bc5f0	5278
nexpaq	0:6c56fb4bc5f0	5279	if( ssl->handshake == NULL )
nexpaq	0:6c56fb4bc5f0	5280	{
nexpaq	0:6c56fb4bc5f0	5281	ssl->handshake = mbedtls_calloc( 1, sizeof(mbedtls_ssl_handshake_params) );
nexpaq	0:6c56fb4bc5f0	5282	}
nexpaq	0:6c56fb4bc5f0	5283
nexpaq	0:6c56fb4bc5f0	5284	/* All pointers should exist and can be directly freed without issue */
nexpaq	0:6c56fb4bc5f0	5285	if( ssl->handshake == NULL \|\|
nexpaq	0:6c56fb4bc5f0	5286	ssl->transform_negotiate == NULL \|\|
nexpaq	0:6c56fb4bc5f0	5287	ssl->session_negotiate == NULL )
nexpaq	0:6c56fb4bc5f0	5288	{
nexpaq	0:6c56fb4bc5f0	5289	MBEDTLS_SSL_DEBUG_MSG( 1, ( "alloc() of ssl sub-contexts failed" ) );
nexpaq	0:6c56fb4bc5f0	5290
nexpaq	0:6c56fb4bc5f0	5291	mbedtls_free( ssl->handshake );
nexpaq	0:6c56fb4bc5f0	5292	mbedtls_free( ssl->transform_negotiate );
nexpaq	0:6c56fb4bc5f0	5293	mbedtls_free( ssl->session_negotiate );
nexpaq	0:6c56fb4bc5f0	5294
nexpaq	0:6c56fb4bc5f0	5295	ssl->handshake = NULL;
nexpaq	0:6c56fb4bc5f0	5296	ssl->transform_negotiate = NULL;
nexpaq	0:6c56fb4bc5f0	5297	ssl->session_negotiate = NULL;
nexpaq	0:6c56fb4bc5f0	5298
nexpaq	0:6c56fb4bc5f0	5299	return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
nexpaq	0:6c56fb4bc5f0	5300	}
nexpaq	0:6c56fb4bc5f0	5301
nexpaq	0:6c56fb4bc5f0	5302	/* Initialize structures */
nexpaq	0:6c56fb4bc5f0	5303	mbedtls_ssl_session_init( ssl->session_negotiate );
nexpaq	0:6c56fb4bc5f0	5304	ssl_transform_init( ssl->transform_negotiate );
nexpaq	0:6c56fb4bc5f0	5305	ssl_handshake_params_init( ssl->handshake );
nexpaq	0:6c56fb4bc5f0	5306
nexpaq	0:6c56fb4bc5f0	5307	#if defined(MBEDTLS_SSL_PROTO_DTLS)
nexpaq	0:6c56fb4bc5f0	5308	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
nexpaq	0:6c56fb4bc5f0	5309	{
nexpaq	0:6c56fb4bc5f0	5310	ssl->handshake->alt_transform_out = ssl->transform_out;
nexpaq	0:6c56fb4bc5f0	5311
nexpaq	0:6c56fb4bc5f0	5312	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_CLIENT )
nexpaq	0:6c56fb4bc5f0	5313	ssl->handshake->retransmit_state = MBEDTLS_SSL_RETRANS_PREPARING;
nexpaq	0:6c56fb4bc5f0	5314	else
nexpaq	0:6c56fb4bc5f0	5315	ssl->handshake->retransmit_state = MBEDTLS_SSL_RETRANS_WAITING;
nexpaq	0:6c56fb4bc5f0	5316
nexpaq	0:6c56fb4bc5f0	5317	ssl_set_timer( ssl, 0 );
nexpaq	0:6c56fb4bc5f0	5318	}
nexpaq	0:6c56fb4bc5f0	5319	#endif
nexpaq	0:6c56fb4bc5f0	5320
nexpaq	0:6c56fb4bc5f0	5321	return( 0 );
nexpaq	0:6c56fb4bc5f0	5322	}
nexpaq	0:6c56fb4bc5f0	5323
nexpaq	0:6c56fb4bc5f0	5324	#if defined(MBEDTLS_SSL_DTLS_HELLO_VERIFY) && defined(MBEDTLS_SSL_SRV_C)
nexpaq	0:6c56fb4bc5f0	5325	/* Dummy cookie callbacks for defaults */
nexpaq	0:6c56fb4bc5f0	5326	static int ssl_cookie_write_dummy( void *ctx,
nexpaq	0:6c56fb4bc5f0	5327	unsigned char *p, unsigned char end,
nexpaq	0:6c56fb4bc5f0	5328	const unsigned char *cli_id, size_t cli_id_len )
nexpaq	0:6c56fb4bc5f0	5329	{
nexpaq	0:6c56fb4bc5f0	5330	((void) ctx);
nexpaq	0:6c56fb4bc5f0	5331	((void) p);
nexpaq	0:6c56fb4bc5f0	5332	((void) end);
nexpaq	0:6c56fb4bc5f0	5333	((void) cli_id);
nexpaq	0:6c56fb4bc5f0	5334	((void) cli_id_len);
nexpaq	0:6c56fb4bc5f0	5335
nexpaq	0:6c56fb4bc5f0	5336	return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE );
nexpaq	0:6c56fb4bc5f0	5337	}
nexpaq	0:6c56fb4bc5f0	5338
nexpaq	0:6c56fb4bc5f0	5339	static int ssl_cookie_check_dummy( void *ctx,
nexpaq	0:6c56fb4bc5f0	5340	const unsigned char *cookie, size_t cookie_len,
nexpaq	0:6c56fb4bc5f0	5341	const unsigned char *cli_id, size_t cli_id_len )
nexpaq	0:6c56fb4bc5f0	5342	{
nexpaq	0:6c56fb4bc5f0	5343	((void) ctx);
nexpaq	0:6c56fb4bc5f0	5344	((void) cookie);
nexpaq	0:6c56fb4bc5f0	5345	((void) cookie_len);
nexpaq	0:6c56fb4bc5f0	5346	((void) cli_id);
nexpaq	0:6c56fb4bc5f0	5347	((void) cli_id_len);
nexpaq	0:6c56fb4bc5f0	5348
nexpaq	0:6c56fb4bc5f0	5349	return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE );
nexpaq	0:6c56fb4bc5f0	5350	}
nexpaq	0:6c56fb4bc5f0	5351	#endif /* MBEDTLS_SSL_DTLS_HELLO_VERIFY && MBEDTLS_SSL_SRV_C */
nexpaq	0:6c56fb4bc5f0	5352
nexpaq	0:6c56fb4bc5f0	5353	/*
nexpaq	0:6c56fb4bc5f0	5354	* Initialize an SSL context
nexpaq	0:6c56fb4bc5f0	5355	*/
nexpaq	0:6c56fb4bc5f0	5356	void mbedtls_ssl_init( mbedtls_ssl_context *ssl )
nexpaq	0:6c56fb4bc5f0	5357	{
nexpaq	0:6c56fb4bc5f0	5358	memset( ssl, 0, sizeof( mbedtls_ssl_context ) );
nexpaq	0:6c56fb4bc5f0	5359	}
nexpaq	0:6c56fb4bc5f0	5360
nexpaq	0:6c56fb4bc5f0	5361	/*
nexpaq	0:6c56fb4bc5f0	5362	* Setup an SSL context
nexpaq	0:6c56fb4bc5f0	5363	*/
nexpaq	0:6c56fb4bc5f0	5364	int mbedtls_ssl_setup( mbedtls_ssl_context *ssl,
nexpaq	0:6c56fb4bc5f0	5365	const mbedtls_ssl_config *conf )
nexpaq	0:6c56fb4bc5f0	5366	{
nexpaq	0:6c56fb4bc5f0	5367	int ret;
nexpaq	0:6c56fb4bc5f0	5368	const size_t len = MBEDTLS_SSL_BUFFER_LEN;
nexpaq	0:6c56fb4bc5f0	5369
nexpaq	0:6c56fb4bc5f0	5370	ssl->conf = conf;
nexpaq	0:6c56fb4bc5f0	5371
nexpaq	0:6c56fb4bc5f0	5372	/*
nexpaq	0:6c56fb4bc5f0	5373	* Prepare base structures
nexpaq	0:6c56fb4bc5f0	5374	*/
nexpaq	0:6c56fb4bc5f0	5375	if( ( ssl-> in_buf = mbedtls_calloc( 1, len ) ) == NULL \|\|
nexpaq	0:6c56fb4bc5f0	5376	( ssl->out_buf = mbedtls_calloc( 1, len ) ) == NULL )
nexpaq	0:6c56fb4bc5f0	5377	{
nexpaq	0:6c56fb4bc5f0	5378	MBEDTLS_SSL_DEBUG_MSG( 1, ( "alloc(%d bytes) failed", len ) );
nexpaq	0:6c56fb4bc5f0	5379	mbedtls_free( ssl->in_buf );
nexpaq	0:6c56fb4bc5f0	5380	ssl->in_buf = NULL;
nexpaq	0:6c56fb4bc5f0	5381	return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
nexpaq	0:6c56fb4bc5f0	5382	}
nexpaq	0:6c56fb4bc5f0	5383
nexpaq	0:6c56fb4bc5f0	5384	#if defined(MBEDTLS_SSL_PROTO_DTLS)
nexpaq	0:6c56fb4bc5f0	5385	if( conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
nexpaq	0:6c56fb4bc5f0	5386	{
nexpaq	0:6c56fb4bc5f0	5387	ssl->out_hdr = ssl->out_buf;
nexpaq	0:6c56fb4bc5f0	5388	ssl->out_ctr = ssl->out_buf + 3;
nexpaq	0:6c56fb4bc5f0	5389	ssl->out_len = ssl->out_buf + 11;
nexpaq	0:6c56fb4bc5f0	5390	ssl->out_iv = ssl->out_buf + 13;
nexpaq	0:6c56fb4bc5f0	5391	ssl->out_msg = ssl->out_buf + 13;
nexpaq	0:6c56fb4bc5f0	5392
nexpaq	0:6c56fb4bc5f0	5393	ssl->in_hdr = ssl->in_buf;
nexpaq	0:6c56fb4bc5f0	5394	ssl->in_ctr = ssl->in_buf + 3;
nexpaq	0:6c56fb4bc5f0	5395	ssl->in_len = ssl->in_buf + 11;
nexpaq	0:6c56fb4bc5f0	5396	ssl->in_iv = ssl->in_buf + 13;
nexpaq	0:6c56fb4bc5f0	5397	ssl->in_msg = ssl->in_buf + 13;
nexpaq	0:6c56fb4bc5f0	5398	}
nexpaq	0:6c56fb4bc5f0	5399	else
nexpaq	0:6c56fb4bc5f0	5400	#endif
nexpaq	0:6c56fb4bc5f0	5401	{
nexpaq	0:6c56fb4bc5f0	5402	ssl->out_ctr = ssl->out_buf;
nexpaq	0:6c56fb4bc5f0	5403	ssl->out_hdr = ssl->out_buf + 8;
nexpaq	0:6c56fb4bc5f0	5404	ssl->out_len = ssl->out_buf + 11;
nexpaq	0:6c56fb4bc5f0	5405	ssl->out_iv = ssl->out_buf + 13;
nexpaq	0:6c56fb4bc5f0	5406	ssl->out_msg = ssl->out_buf + 13;
nexpaq	0:6c56fb4bc5f0	5407
nexpaq	0:6c56fb4bc5f0	5408	ssl->in_ctr = ssl->in_buf;
nexpaq	0:6c56fb4bc5f0	5409	ssl->in_hdr = ssl->in_buf + 8;
nexpaq	0:6c56fb4bc5f0	5410	ssl->in_len = ssl->in_buf + 11;
nexpaq	0:6c56fb4bc5f0	5411	ssl->in_iv = ssl->in_buf + 13;
nexpaq	0:6c56fb4bc5f0	5412	ssl->in_msg = ssl->in_buf + 13;
nexpaq	0:6c56fb4bc5f0	5413	}
nexpaq	0:6c56fb4bc5f0	5414
nexpaq	0:6c56fb4bc5f0	5415	if( ( ret = ssl_handshake_init( ssl ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	5416	return( ret );
nexpaq	0:6c56fb4bc5f0	5417
nexpaq	0:6c56fb4bc5f0	5418	return( 0 );
nexpaq	0:6c56fb4bc5f0	5419	}
nexpaq	0:6c56fb4bc5f0	5420
nexpaq	0:6c56fb4bc5f0	5421	/*
nexpaq	0:6c56fb4bc5f0	5422	* Reset an initialized and used SSL context for re-use while retaining
nexpaq	0:6c56fb4bc5f0	5423	* all application-set variables, function pointers and data.
nexpaq	0:6c56fb4bc5f0	5424	*
nexpaq	0:6c56fb4bc5f0	5425	* If partial is non-zero, keep data in the input buffer and client ID.
nexpaq	0:6c56fb4bc5f0	5426	* (Use when a DTLS client reconnects from the same port.)
nexpaq	0:6c56fb4bc5f0	5427	*/
nexpaq	0:6c56fb4bc5f0	5428	static int ssl_session_reset_int( mbedtls_ssl_context *ssl, int partial )
nexpaq	0:6c56fb4bc5f0	5429	{
nexpaq	0:6c56fb4bc5f0	5430	int ret;
nexpaq	0:6c56fb4bc5f0	5431
nexpaq	0:6c56fb4bc5f0	5432	ssl->state = MBEDTLS_SSL_HELLO_REQUEST;
nexpaq	0:6c56fb4bc5f0	5433
nexpaq	0:6c56fb4bc5f0	5434	/* Cancel any possibly running timer */
nexpaq	0:6c56fb4bc5f0	5435	ssl_set_timer( ssl, 0 );
nexpaq	0:6c56fb4bc5f0	5436
nexpaq	0:6c56fb4bc5f0	5437	#if defined(MBEDTLS_SSL_RENEGOTIATION)
nexpaq	0:6c56fb4bc5f0	5438	ssl->renego_status = MBEDTLS_SSL_INITIAL_HANDSHAKE;
nexpaq	0:6c56fb4bc5f0	5439	ssl->renego_records_seen = 0;
nexpaq	0:6c56fb4bc5f0	5440
nexpaq	0:6c56fb4bc5f0	5441	ssl->verify_data_len = 0;
nexpaq	0:6c56fb4bc5f0	5442	memset( ssl->own_verify_data, 0, MBEDTLS_SSL_VERIFY_DATA_MAX_LEN );
nexpaq	0:6c56fb4bc5f0	5443	memset( ssl->peer_verify_data, 0, MBEDTLS_SSL_VERIFY_DATA_MAX_LEN );
nexpaq	0:6c56fb4bc5f0	5444	#endif
nexpaq	0:6c56fb4bc5f0	5445	ssl->secure_renegotiation = MBEDTLS_SSL_LEGACY_RENEGOTIATION;
nexpaq	0:6c56fb4bc5f0	5446
nexpaq	0:6c56fb4bc5f0	5447	ssl->in_offt = NULL;
nexpaq	0:6c56fb4bc5f0	5448
nexpaq	0:6c56fb4bc5f0	5449	ssl->in_msg = ssl->in_buf + 13;
nexpaq	0:6c56fb4bc5f0	5450	ssl->in_msgtype = 0;
nexpaq	0:6c56fb4bc5f0	5451	ssl->in_msglen = 0;
nexpaq	0:6c56fb4bc5f0	5452	if( partial == 0 )
nexpaq	0:6c56fb4bc5f0	5453	ssl->in_left = 0;
nexpaq	0:6c56fb4bc5f0	5454	#if defined(MBEDTLS_SSL_PROTO_DTLS)
nexpaq	0:6c56fb4bc5f0	5455	ssl->next_record_offset = 0;
nexpaq	0:6c56fb4bc5f0	5456	ssl->in_epoch = 0;
nexpaq	0:6c56fb4bc5f0	5457	#endif
nexpaq	0:6c56fb4bc5f0	5458	#if defined(MBEDTLS_SSL_DTLS_ANTI_REPLAY)
nexpaq	0:6c56fb4bc5f0	5459	ssl_dtls_replay_reset( ssl );
nexpaq	0:6c56fb4bc5f0	5460	#endif
nexpaq	0:6c56fb4bc5f0	5461
nexpaq	0:6c56fb4bc5f0	5462	ssl->in_hslen = 0;
nexpaq	0:6c56fb4bc5f0	5463	ssl->nb_zero = 0;
nexpaq	0:6c56fb4bc5f0	5464	ssl->record_read = 0;
nexpaq	0:6c56fb4bc5f0	5465
nexpaq	0:6c56fb4bc5f0	5466	ssl->out_msg = ssl->out_buf + 13;
nexpaq	0:6c56fb4bc5f0	5467	ssl->out_msgtype = 0;
nexpaq	0:6c56fb4bc5f0	5468	ssl->out_msglen = 0;
nexpaq	0:6c56fb4bc5f0	5469	ssl->out_left = 0;
nexpaq	0:6c56fb4bc5f0	5470	#if defined(MBEDTLS_SSL_CBC_RECORD_SPLITTING)
nexpaq	0:6c56fb4bc5f0	5471	if( ssl->split_done != MBEDTLS_SSL_CBC_RECORD_SPLITTING_DISABLED )
nexpaq	0:6c56fb4bc5f0	5472	ssl->split_done = 0;
nexpaq	0:6c56fb4bc5f0	5473	#endif
nexpaq	0:6c56fb4bc5f0	5474
nexpaq	0:6c56fb4bc5f0	5475	ssl->transform_in = NULL;
nexpaq	0:6c56fb4bc5f0	5476	ssl->transform_out = NULL;
nexpaq	0:6c56fb4bc5f0	5477
nexpaq	0:6c56fb4bc5f0	5478	memset( ssl->out_buf, 0, MBEDTLS_SSL_BUFFER_LEN );
nexpaq	0:6c56fb4bc5f0	5479	if( partial == 0 )
nexpaq	0:6c56fb4bc5f0	5480	memset( ssl->in_buf, 0, MBEDTLS_SSL_BUFFER_LEN );
nexpaq	0:6c56fb4bc5f0	5481
nexpaq	0:6c56fb4bc5f0	5482	#if defined(MBEDTLS_SSL_HW_RECORD_ACCEL)
nexpaq	0:6c56fb4bc5f0	5483	if( mbedtls_ssl_hw_record_reset != NULL )
nexpaq	0:6c56fb4bc5f0	5484	{
nexpaq	0:6c56fb4bc5f0	5485	MBEDTLS_SSL_DEBUG_MSG( 2, ( "going for mbedtls_ssl_hw_record_reset()" ) );
nexpaq	0:6c56fb4bc5f0	5486	if( ( ret = mbedtls_ssl_hw_record_reset( ssl ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	5487	{
nexpaq	0:6c56fb4bc5f0	5488	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_hw_record_reset", ret );
nexpaq	0:6c56fb4bc5f0	5489	return( MBEDTLS_ERR_SSL_HW_ACCEL_FAILED );
nexpaq	0:6c56fb4bc5f0	5490	}
nexpaq	0:6c56fb4bc5f0	5491	}
nexpaq	0:6c56fb4bc5f0	5492	#endif
nexpaq	0:6c56fb4bc5f0	5493
nexpaq	0:6c56fb4bc5f0	5494	if( ssl->transform )
nexpaq	0:6c56fb4bc5f0	5495	{
nexpaq	0:6c56fb4bc5f0	5496	mbedtls_ssl_transform_free( ssl->transform );
nexpaq	0:6c56fb4bc5f0	5497	mbedtls_free( ssl->transform );
nexpaq	0:6c56fb4bc5f0	5498	ssl->transform = NULL;
nexpaq	0:6c56fb4bc5f0	5499	}
nexpaq	0:6c56fb4bc5f0	5500
nexpaq	0:6c56fb4bc5f0	5501	if( ssl->session )
nexpaq	0:6c56fb4bc5f0	5502	{
nexpaq	0:6c56fb4bc5f0	5503	mbedtls_ssl_session_free( ssl->session );
nexpaq	0:6c56fb4bc5f0	5504	mbedtls_free( ssl->session );
nexpaq	0:6c56fb4bc5f0	5505	ssl->session = NULL;
nexpaq	0:6c56fb4bc5f0	5506	}
nexpaq	0:6c56fb4bc5f0	5507
nexpaq	0:6c56fb4bc5f0	5508	#if defined(MBEDTLS_SSL_ALPN)
nexpaq	0:6c56fb4bc5f0	5509	ssl->alpn_chosen = NULL;
nexpaq	0:6c56fb4bc5f0	5510	#endif
nexpaq	0:6c56fb4bc5f0	5511
nexpaq	0:6c56fb4bc5f0	5512	#if defined(MBEDTLS_SSL_DTLS_HELLO_VERIFY) && defined(MBEDTLS_SSL_SRV_C)
nexpaq	0:6c56fb4bc5f0	5513	if( partial == 0 )
nexpaq	0:6c56fb4bc5f0	5514	{
nexpaq	0:6c56fb4bc5f0	5515	mbedtls_free( ssl->cli_id );
nexpaq	0:6c56fb4bc5f0	5516	ssl->cli_id = NULL;
nexpaq	0:6c56fb4bc5f0	5517	ssl->cli_id_len = 0;
nexpaq	0:6c56fb4bc5f0	5518	}
nexpaq	0:6c56fb4bc5f0	5519	#endif
nexpaq	0:6c56fb4bc5f0	5520
nexpaq	0:6c56fb4bc5f0	5521	if( ( ret = ssl_handshake_init( ssl ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	5522	return( ret );
nexpaq	0:6c56fb4bc5f0	5523
nexpaq	0:6c56fb4bc5f0	5524	return( 0 );
nexpaq	0:6c56fb4bc5f0	5525	}
nexpaq	0:6c56fb4bc5f0	5526
nexpaq	0:6c56fb4bc5f0	5527	/*
nexpaq	0:6c56fb4bc5f0	5528	* Reset an initialized and used SSL context for re-use while retaining
nexpaq	0:6c56fb4bc5f0	5529	* all application-set variables, function pointers and data.
nexpaq	0:6c56fb4bc5f0	5530	*/
nexpaq	0:6c56fb4bc5f0	5531	int mbedtls_ssl_session_reset( mbedtls_ssl_context *ssl )
nexpaq	0:6c56fb4bc5f0	5532	{
nexpaq	0:6c56fb4bc5f0	5533	return( ssl_session_reset_int( ssl, 0 ) );
nexpaq	0:6c56fb4bc5f0	5534	}
nexpaq	0:6c56fb4bc5f0	5535
nexpaq	0:6c56fb4bc5f0	5536	/*
nexpaq	0:6c56fb4bc5f0	5537	* SSL set accessors
nexpaq	0:6c56fb4bc5f0	5538	*/
nexpaq	0:6c56fb4bc5f0	5539	void mbedtls_ssl_conf_endpoint( mbedtls_ssl_config *conf, int endpoint )
nexpaq	0:6c56fb4bc5f0	5540	{
nexpaq	0:6c56fb4bc5f0	5541	conf->endpoint = endpoint;
nexpaq	0:6c56fb4bc5f0	5542	}
nexpaq	0:6c56fb4bc5f0	5543
nexpaq	0:6c56fb4bc5f0	5544	void mbedtls_ssl_conf_transport( mbedtls_ssl_config *conf, int transport )
nexpaq	0:6c56fb4bc5f0	5545	{
nexpaq	0:6c56fb4bc5f0	5546	conf->transport = transport;
nexpaq	0:6c56fb4bc5f0	5547	}
nexpaq	0:6c56fb4bc5f0	5548
nexpaq	0:6c56fb4bc5f0	5549	#if defined(MBEDTLS_SSL_DTLS_ANTI_REPLAY)
nexpaq	0:6c56fb4bc5f0	5550	void mbedtls_ssl_conf_dtls_anti_replay( mbedtls_ssl_config *conf, char mode )
nexpaq	0:6c56fb4bc5f0	5551	{
nexpaq	0:6c56fb4bc5f0	5552	conf->anti_replay = mode;
nexpaq	0:6c56fb4bc5f0	5553	}
nexpaq	0:6c56fb4bc5f0	5554	#endif
nexpaq	0:6c56fb4bc5f0	5555
nexpaq	0:6c56fb4bc5f0	5556	#if defined(MBEDTLS_SSL_DTLS_BADMAC_LIMIT)
nexpaq	0:6c56fb4bc5f0	5557	void mbedtls_ssl_conf_dtls_badmac_limit( mbedtls_ssl_config *conf, unsigned limit )
nexpaq	0:6c56fb4bc5f0	5558	{
nexpaq	0:6c56fb4bc5f0	5559	conf->badmac_limit = limit;
nexpaq	0:6c56fb4bc5f0	5560	}
nexpaq	0:6c56fb4bc5f0	5561	#endif
nexpaq	0:6c56fb4bc5f0	5562
nexpaq	0:6c56fb4bc5f0	5563	#if defined(MBEDTLS_SSL_PROTO_DTLS)
nexpaq	0:6c56fb4bc5f0	5564	void mbedtls_ssl_conf_handshake_timeout( mbedtls_ssl_config *conf, uint32_t min, uint32_t max )
nexpaq	0:6c56fb4bc5f0	5565	{
nexpaq	0:6c56fb4bc5f0	5566	conf->hs_timeout_min = min;
nexpaq	0:6c56fb4bc5f0	5567	conf->hs_timeout_max = max;
nexpaq	0:6c56fb4bc5f0	5568	}
nexpaq	0:6c56fb4bc5f0	5569	#endif
nexpaq	0:6c56fb4bc5f0	5570
nexpaq	0:6c56fb4bc5f0	5571	void mbedtls_ssl_conf_authmode( mbedtls_ssl_config *conf, int authmode )
nexpaq	0:6c56fb4bc5f0	5572	{
nexpaq	0:6c56fb4bc5f0	5573	conf->authmode = authmode;
nexpaq	0:6c56fb4bc5f0	5574	}
nexpaq	0:6c56fb4bc5f0	5575
nexpaq	0:6c56fb4bc5f0	5576	#if defined(MBEDTLS_X509_CRT_PARSE_C)
nexpaq	0:6c56fb4bc5f0	5577	void mbedtls_ssl_conf_verify( mbedtls_ssl_config *conf,
nexpaq	0:6c56fb4bc5f0	5578	int (f_vrfy)(void , mbedtls_x509_crt , int, uint32_t ),
nexpaq	0:6c56fb4bc5f0	5579	void *p_vrfy )
nexpaq	0:6c56fb4bc5f0	5580	{
nexpaq	0:6c56fb4bc5f0	5581	conf->f_vrfy = f_vrfy;
nexpaq	0:6c56fb4bc5f0	5582	conf->p_vrfy = p_vrfy;
nexpaq	0:6c56fb4bc5f0	5583	}
nexpaq	0:6c56fb4bc5f0	5584	#endif /* MBEDTLS_X509_CRT_PARSE_C */
nexpaq	0:6c56fb4bc5f0	5585
nexpaq	0:6c56fb4bc5f0	5586	void mbedtls_ssl_conf_rng( mbedtls_ssl_config *conf,
nexpaq	0:6c56fb4bc5f0	5587	int (f_rng)(void , unsigned char *, size_t),
nexpaq	0:6c56fb4bc5f0	5588	void *p_rng )
nexpaq	0:6c56fb4bc5f0	5589	{
nexpaq	0:6c56fb4bc5f0	5590	conf->f_rng = f_rng;
nexpaq	0:6c56fb4bc5f0	5591	conf->p_rng = p_rng;
nexpaq	0:6c56fb4bc5f0	5592	}
nexpaq	0:6c56fb4bc5f0	5593
nexpaq	0:6c56fb4bc5f0	5594	void mbedtls_ssl_conf_dbg( mbedtls_ssl_config *conf,
nexpaq	0:6c56fb4bc5f0	5595	void (f_dbg)(void , int, const char , int, const char ),
nexpaq	0:6c56fb4bc5f0	5596	void *p_dbg )
nexpaq	0:6c56fb4bc5f0	5597	{
nexpaq	0:6c56fb4bc5f0	5598	conf->f_dbg = f_dbg;
nexpaq	0:6c56fb4bc5f0	5599	conf->p_dbg = p_dbg;
nexpaq	0:6c56fb4bc5f0	5600	}
nexpaq	0:6c56fb4bc5f0	5601
nexpaq	0:6c56fb4bc5f0	5602	void mbedtls_ssl_set_bio( mbedtls_ssl_context *ssl,
nexpaq	0:6c56fb4bc5f0	5603	void *p_bio,
nexpaq	0:6c56fb4bc5f0	5604	mbedtls_ssl_send_t *f_send,
nexpaq	0:6c56fb4bc5f0	5605	mbedtls_ssl_recv_t *f_recv,
nexpaq	0:6c56fb4bc5f0	5606	mbedtls_ssl_recv_timeout_t *f_recv_timeout )
nexpaq	0:6c56fb4bc5f0	5607	{
nexpaq	0:6c56fb4bc5f0	5608	ssl->p_bio = p_bio;
nexpaq	0:6c56fb4bc5f0	5609	ssl->f_send = f_send;
nexpaq	0:6c56fb4bc5f0	5610	ssl->f_recv = f_recv;
nexpaq	0:6c56fb4bc5f0	5611	ssl->f_recv_timeout = f_recv_timeout;
nexpaq	0:6c56fb4bc5f0	5612	}
nexpaq	0:6c56fb4bc5f0	5613
nexpaq	0:6c56fb4bc5f0	5614	void mbedtls_ssl_conf_read_timeout( mbedtls_ssl_config *conf, uint32_t timeout )
nexpaq	0:6c56fb4bc5f0	5615	{
nexpaq	0:6c56fb4bc5f0	5616	conf->read_timeout = timeout;
nexpaq	0:6c56fb4bc5f0	5617	}
nexpaq	0:6c56fb4bc5f0	5618
nexpaq	0:6c56fb4bc5f0	5619	void mbedtls_ssl_set_timer_cb( mbedtls_ssl_context *ssl,
nexpaq	0:6c56fb4bc5f0	5620	void *p_timer,
nexpaq	0:6c56fb4bc5f0	5621	mbedtls_ssl_set_timer_t *f_set_timer,
nexpaq	0:6c56fb4bc5f0	5622	mbedtls_ssl_get_timer_t *f_get_timer )
nexpaq	0:6c56fb4bc5f0	5623	{
nexpaq	0:6c56fb4bc5f0	5624	ssl->p_timer = p_timer;
nexpaq	0:6c56fb4bc5f0	5625	ssl->f_set_timer = f_set_timer;
nexpaq	0:6c56fb4bc5f0	5626	ssl->f_get_timer = f_get_timer;
nexpaq	0:6c56fb4bc5f0	5627
nexpaq	0:6c56fb4bc5f0	5628	/* Make sure we start with no timer running */
nexpaq	0:6c56fb4bc5f0	5629	ssl_set_timer( ssl, 0 );
nexpaq	0:6c56fb4bc5f0	5630	}
nexpaq	0:6c56fb4bc5f0	5631
nexpaq	0:6c56fb4bc5f0	5632	#if defined(MBEDTLS_SSL_SRV_C)
nexpaq	0:6c56fb4bc5f0	5633	void mbedtls_ssl_conf_session_cache( mbedtls_ssl_config *conf,
nexpaq	0:6c56fb4bc5f0	5634	void *p_cache,
nexpaq	0:6c56fb4bc5f0	5635	int (f_get_cache)(void , mbedtls_ssl_session *),
nexpaq	0:6c56fb4bc5f0	5636	int (f_set_cache)(void , const mbedtls_ssl_session *) )
nexpaq	0:6c56fb4bc5f0	5637	{
nexpaq	0:6c56fb4bc5f0	5638	conf->p_cache = p_cache;
nexpaq	0:6c56fb4bc5f0	5639	conf->f_get_cache = f_get_cache;
nexpaq	0:6c56fb4bc5f0	5640	conf->f_set_cache = f_set_cache;
nexpaq	0:6c56fb4bc5f0	5641	}
nexpaq	0:6c56fb4bc5f0	5642	#endif /* MBEDTLS_SSL_SRV_C */
nexpaq	0:6c56fb4bc5f0	5643
nexpaq	0:6c56fb4bc5f0	5644	#if defined(MBEDTLS_SSL_CLI_C)
nexpaq	0:6c56fb4bc5f0	5645	int mbedtls_ssl_set_session( mbedtls_ssl_context ssl, const mbedtls_ssl_session session )
nexpaq	0:6c56fb4bc5f0	5646	{
nexpaq	0:6c56fb4bc5f0	5647	int ret;
nexpaq	0:6c56fb4bc5f0	5648
nexpaq	0:6c56fb4bc5f0	5649	if( ssl == NULL \|\|
nexpaq	0:6c56fb4bc5f0	5650	session == NULL \|\|
nexpaq	0:6c56fb4bc5f0	5651	ssl->session_negotiate == NULL \|\|
nexpaq	0:6c56fb4bc5f0	5652	ssl->conf->endpoint != MBEDTLS_SSL_IS_CLIENT )
nexpaq	0:6c56fb4bc5f0	5653	{
nexpaq	0:6c56fb4bc5f0	5654	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
nexpaq	0:6c56fb4bc5f0	5655	}
nexpaq	0:6c56fb4bc5f0	5656
nexpaq	0:6c56fb4bc5f0	5657	if( ( ret = ssl_session_copy( ssl->session_negotiate, session ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	5658	return( ret );
nexpaq	0:6c56fb4bc5f0	5659
nexpaq	0:6c56fb4bc5f0	5660	ssl->handshake->resume = 1;
nexpaq	0:6c56fb4bc5f0	5661
nexpaq	0:6c56fb4bc5f0	5662	return( 0 );
nexpaq	0:6c56fb4bc5f0	5663	}
nexpaq	0:6c56fb4bc5f0	5664	#endif /* MBEDTLS_SSL_CLI_C */
nexpaq	0:6c56fb4bc5f0	5665
nexpaq	0:6c56fb4bc5f0	5666	void mbedtls_ssl_conf_ciphersuites( mbedtls_ssl_config *conf,
nexpaq	0:6c56fb4bc5f0	5667	const int *ciphersuites )
nexpaq	0:6c56fb4bc5f0	5668	{
nexpaq	0:6c56fb4bc5f0	5669	conf->ciphersuite_list[MBEDTLS_SSL_MINOR_VERSION_0] = ciphersuites;
nexpaq	0:6c56fb4bc5f0	5670	conf->ciphersuite_list[MBEDTLS_SSL_MINOR_VERSION_1] = ciphersuites;
nexpaq	0:6c56fb4bc5f0	5671	conf->ciphersuite_list[MBEDTLS_SSL_MINOR_VERSION_2] = ciphersuites;
nexpaq	0:6c56fb4bc5f0	5672	conf->ciphersuite_list[MBEDTLS_SSL_MINOR_VERSION_3] = ciphersuites;
nexpaq	0:6c56fb4bc5f0	5673	}
nexpaq	0:6c56fb4bc5f0	5674
nexpaq	0:6c56fb4bc5f0	5675	void mbedtls_ssl_conf_ciphersuites_for_version( mbedtls_ssl_config *conf,
nexpaq	0:6c56fb4bc5f0	5676	const int *ciphersuites,
nexpaq	0:6c56fb4bc5f0	5677	int major, int minor )
nexpaq	0:6c56fb4bc5f0	5678	{
nexpaq	0:6c56fb4bc5f0	5679	if( major != MBEDTLS_SSL_MAJOR_VERSION_3 )
nexpaq	0:6c56fb4bc5f0	5680	return;
nexpaq	0:6c56fb4bc5f0	5681
nexpaq	0:6c56fb4bc5f0	5682	if( minor < MBEDTLS_SSL_MINOR_VERSION_0 \|\| minor > MBEDTLS_SSL_MINOR_VERSION_3 )
nexpaq	0:6c56fb4bc5f0	5683	return;
nexpaq	0:6c56fb4bc5f0	5684
nexpaq	0:6c56fb4bc5f0	5685	conf->ciphersuite_list[minor] = ciphersuites;
nexpaq	0:6c56fb4bc5f0	5686	}
nexpaq	0:6c56fb4bc5f0	5687
nexpaq	0:6c56fb4bc5f0	5688	#if defined(MBEDTLS_X509_CRT_PARSE_C)
nexpaq	0:6c56fb4bc5f0	5689	void mbedtls_ssl_conf_cert_profile( mbedtls_ssl_config *conf,
nexpaq	0:6c56fb4bc5f0	5690	const mbedtls_x509_crt_profile *profile )
nexpaq	0:6c56fb4bc5f0	5691	{
nexpaq	0:6c56fb4bc5f0	5692	conf->cert_profile = profile;
nexpaq	0:6c56fb4bc5f0	5693	}
nexpaq	0:6c56fb4bc5f0	5694
nexpaq	0:6c56fb4bc5f0	5695	/* Append a new keycert entry to a (possibly empty) list */
nexpaq	0:6c56fb4bc5f0	5696	static int ssl_append_key_cert( mbedtls_ssl_key_cert **head,
nexpaq	0:6c56fb4bc5f0	5697	mbedtls_x509_crt *cert,
nexpaq	0:6c56fb4bc5f0	5698	mbedtls_pk_context *key )
nexpaq	0:6c56fb4bc5f0	5699	{
nexpaq	0:6c56fb4bc5f0	5700	mbedtls_ssl_key_cert *new;
nexpaq	0:6c56fb4bc5f0	5701
nexpaq	0:6c56fb4bc5f0	5702	new = mbedtls_calloc( 1, sizeof( mbedtls_ssl_key_cert ) );
nexpaq	0:6c56fb4bc5f0	5703	if( new == NULL )
nexpaq	0:6c56fb4bc5f0	5704	return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
nexpaq	0:6c56fb4bc5f0	5705
nexpaq	0:6c56fb4bc5f0	5706	new->cert = cert;
nexpaq	0:6c56fb4bc5f0	5707	new->key = key;
nexpaq	0:6c56fb4bc5f0	5708	new->next = NULL;
nexpaq	0:6c56fb4bc5f0	5709
nexpaq	0:6c56fb4bc5f0	5710	/* Update head is the list was null, else add to the end */
nexpaq	0:6c56fb4bc5f0	5711	if( *head == NULL )
nexpaq	0:6c56fb4bc5f0	5712	{
nexpaq	0:6c56fb4bc5f0	5713	*head = new;
nexpaq	0:6c56fb4bc5f0	5714	}
nexpaq	0:6c56fb4bc5f0	5715	else
nexpaq	0:6c56fb4bc5f0	5716	{
nexpaq	0:6c56fb4bc5f0	5717	mbedtls_ssl_key_cert cur = head;
nexpaq	0:6c56fb4bc5f0	5718	while( cur->next != NULL )
nexpaq	0:6c56fb4bc5f0	5719	cur = cur->next;
nexpaq	0:6c56fb4bc5f0	5720	cur->next = new;
nexpaq	0:6c56fb4bc5f0	5721	}
nexpaq	0:6c56fb4bc5f0	5722
nexpaq	0:6c56fb4bc5f0	5723	return( 0 );
nexpaq	0:6c56fb4bc5f0	5724	}
nexpaq	0:6c56fb4bc5f0	5725
nexpaq	0:6c56fb4bc5f0	5726	int mbedtls_ssl_conf_own_cert( mbedtls_ssl_config *conf,
nexpaq	0:6c56fb4bc5f0	5727	mbedtls_x509_crt *own_cert,
nexpaq	0:6c56fb4bc5f0	5728	mbedtls_pk_context *pk_key )
nexpaq	0:6c56fb4bc5f0	5729	{
nexpaq	0:6c56fb4bc5f0	5730	return( ssl_append_key_cert( &conf->key_cert, own_cert, pk_key ) );
nexpaq	0:6c56fb4bc5f0	5731	}
nexpaq	0:6c56fb4bc5f0	5732
nexpaq	0:6c56fb4bc5f0	5733	void mbedtls_ssl_conf_ca_chain( mbedtls_ssl_config *conf,
nexpaq	0:6c56fb4bc5f0	5734	mbedtls_x509_crt *ca_chain,
nexpaq	0:6c56fb4bc5f0	5735	mbedtls_x509_crl *ca_crl )
nexpaq	0:6c56fb4bc5f0	5736	{
nexpaq	0:6c56fb4bc5f0	5737	conf->ca_chain = ca_chain;
nexpaq	0:6c56fb4bc5f0	5738	conf->ca_crl = ca_crl;
nexpaq	0:6c56fb4bc5f0	5739	}
nexpaq	0:6c56fb4bc5f0	5740	#endif /* MBEDTLS_X509_CRT_PARSE_C */
nexpaq	0:6c56fb4bc5f0	5741
nexpaq	0:6c56fb4bc5f0	5742	#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
nexpaq	0:6c56fb4bc5f0	5743	int mbedtls_ssl_set_hs_own_cert( mbedtls_ssl_context *ssl,
nexpaq	0:6c56fb4bc5f0	5744	mbedtls_x509_crt *own_cert,
nexpaq	0:6c56fb4bc5f0	5745	mbedtls_pk_context *pk_key )
nexpaq	0:6c56fb4bc5f0	5746	{
nexpaq	0:6c56fb4bc5f0	5747	return( ssl_append_key_cert( &ssl->handshake->sni_key_cert,
nexpaq	0:6c56fb4bc5f0	5748	own_cert, pk_key ) );
nexpaq	0:6c56fb4bc5f0	5749	}
nexpaq	0:6c56fb4bc5f0	5750
nexpaq	0:6c56fb4bc5f0	5751	void mbedtls_ssl_set_hs_ca_chain( mbedtls_ssl_context *ssl,
nexpaq	0:6c56fb4bc5f0	5752	mbedtls_x509_crt *ca_chain,
nexpaq	0:6c56fb4bc5f0	5753	mbedtls_x509_crl *ca_crl )
nexpaq	0:6c56fb4bc5f0	5754	{
nexpaq	0:6c56fb4bc5f0	5755	ssl->handshake->sni_ca_chain = ca_chain;
nexpaq	0:6c56fb4bc5f0	5756	ssl->handshake->sni_ca_crl = ca_crl;
nexpaq	0:6c56fb4bc5f0	5757	}
nexpaq	0:6c56fb4bc5f0	5758
nexpaq	0:6c56fb4bc5f0	5759	void mbedtls_ssl_set_hs_authmode( mbedtls_ssl_context *ssl,
nexpaq	0:6c56fb4bc5f0	5760	int authmode )
nexpaq	0:6c56fb4bc5f0	5761	{
nexpaq	0:6c56fb4bc5f0	5762	ssl->handshake->sni_authmode = authmode;
nexpaq	0:6c56fb4bc5f0	5763	}
nexpaq	0:6c56fb4bc5f0	5764	#endif /* MBEDTLS_SSL_SERVER_NAME_INDICATION */
nexpaq	0:6c56fb4bc5f0	5765
nexpaq	0:6c56fb4bc5f0	5766	#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
nexpaq	0:6c56fb4bc5f0	5767	/*
nexpaq	0:6c56fb4bc5f0	5768	* Set EC J-PAKE password for current handshake
nexpaq	0:6c56fb4bc5f0	5769	*/
nexpaq	0:6c56fb4bc5f0	5770	int mbedtls_ssl_set_hs_ecjpake_password( mbedtls_ssl_context *ssl,
nexpaq	0:6c56fb4bc5f0	5771	const unsigned char *pw,
nexpaq	0:6c56fb4bc5f0	5772	size_t pw_len )
nexpaq	0:6c56fb4bc5f0	5773	{
nexpaq	0:6c56fb4bc5f0	5774	mbedtls_ecjpake_role role;
nexpaq	0:6c56fb4bc5f0	5775
nexpaq	0:6c56fb4bc5f0	5776	if( ssl->handshake == NULL \|\| ssl->conf == NULL )
nexpaq	0:6c56fb4bc5f0	5777	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
nexpaq	0:6c56fb4bc5f0	5778
nexpaq	0:6c56fb4bc5f0	5779	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER )
nexpaq	0:6c56fb4bc5f0	5780	role = MBEDTLS_ECJPAKE_SERVER;
nexpaq	0:6c56fb4bc5f0	5781	else
nexpaq	0:6c56fb4bc5f0	5782	role = MBEDTLS_ECJPAKE_CLIENT;
nexpaq	0:6c56fb4bc5f0	5783
nexpaq	0:6c56fb4bc5f0	5784	return( mbedtls_ecjpake_setup( &ssl->handshake->ecjpake_ctx,
nexpaq	0:6c56fb4bc5f0	5785	role,
nexpaq	0:6c56fb4bc5f0	5786	MBEDTLS_MD_SHA256,
nexpaq	0:6c56fb4bc5f0	5787	MBEDTLS_ECP_DP_SECP256R1,
nexpaq	0:6c56fb4bc5f0	5788	pw, pw_len ) );
nexpaq	0:6c56fb4bc5f0	5789	}
nexpaq	0:6c56fb4bc5f0	5790	#endif /* MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED */
nexpaq	0:6c56fb4bc5f0	5791
nexpaq	0:6c56fb4bc5f0	5792	#if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
nexpaq	0:6c56fb4bc5f0	5793	int mbedtls_ssl_conf_psk( mbedtls_ssl_config *conf,
nexpaq	0:6c56fb4bc5f0	5794	const unsigned char *psk, size_t psk_len,
nexpaq	0:6c56fb4bc5f0	5795	const unsigned char *psk_identity, size_t psk_identity_len )
nexpaq	0:6c56fb4bc5f0	5796	{
nexpaq	0:6c56fb4bc5f0	5797	if( psk == NULL \|\| psk_identity == NULL )
nexpaq	0:6c56fb4bc5f0	5798	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
nexpaq	0:6c56fb4bc5f0	5799
nexpaq	0:6c56fb4bc5f0	5800	if( psk_len > MBEDTLS_PSK_MAX_LEN )
nexpaq	0:6c56fb4bc5f0	5801	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
nexpaq	0:6c56fb4bc5f0	5802
nexpaq	0:6c56fb4bc5f0	5803	/* Identity len will be encoded on two bytes */
nexpaq	0:6c56fb4bc5f0	5804	if( ( psk_identity_len >> 16 ) != 0 \|\|
nexpaq	0:6c56fb4bc5f0	5805	psk_identity_len > MBEDTLS_SSL_MAX_CONTENT_LEN )
nexpaq	0:6c56fb4bc5f0	5806	{
nexpaq	0:6c56fb4bc5f0	5807	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
nexpaq	0:6c56fb4bc5f0	5808	}
nexpaq	0:6c56fb4bc5f0	5809
nexpaq	0:6c56fb4bc5f0	5810	if( conf->psk != NULL \|\| conf->psk_identity != NULL )
nexpaq	0:6c56fb4bc5f0	5811	{
nexpaq	0:6c56fb4bc5f0	5812	mbedtls_free( conf->psk );
nexpaq	0:6c56fb4bc5f0	5813	mbedtls_free( conf->psk_identity );
nexpaq	0:6c56fb4bc5f0	5814	conf->psk = NULL;
nexpaq	0:6c56fb4bc5f0	5815	conf->psk_identity = NULL;
nexpaq	0:6c56fb4bc5f0	5816	}
nexpaq	0:6c56fb4bc5f0	5817
nexpaq	0:6c56fb4bc5f0	5818	if( ( conf->psk = mbedtls_calloc( 1, psk_len ) ) == NULL \|\|
nexpaq	0:6c56fb4bc5f0	5819	( conf->psk_identity = mbedtls_calloc( 1, psk_identity_len ) ) == NULL )
nexpaq	0:6c56fb4bc5f0	5820	{
nexpaq	0:6c56fb4bc5f0	5821	mbedtls_free( conf->psk );
nexpaq	0:6c56fb4bc5f0	5822	mbedtls_free( conf->psk_identity );
nexpaq	0:6c56fb4bc5f0	5823	conf->psk = NULL;
nexpaq	0:6c56fb4bc5f0	5824	conf->psk_identity = NULL;
nexpaq	0:6c56fb4bc5f0	5825	return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
nexpaq	0:6c56fb4bc5f0	5826	}
nexpaq	0:6c56fb4bc5f0	5827
nexpaq	0:6c56fb4bc5f0	5828	conf->psk_len = psk_len;
nexpaq	0:6c56fb4bc5f0	5829	conf->psk_identity_len = psk_identity_len;
nexpaq	0:6c56fb4bc5f0	5830
nexpaq	0:6c56fb4bc5f0	5831	memcpy( conf->psk, psk, conf->psk_len );
nexpaq	0:6c56fb4bc5f0	5832	memcpy( conf->psk_identity, psk_identity, conf->psk_identity_len );
nexpaq	0:6c56fb4bc5f0	5833
nexpaq	0:6c56fb4bc5f0	5834	return( 0 );
nexpaq	0:6c56fb4bc5f0	5835	}
nexpaq	0:6c56fb4bc5f0	5836
nexpaq	0:6c56fb4bc5f0	5837	int mbedtls_ssl_set_hs_psk( mbedtls_ssl_context *ssl,
nexpaq	0:6c56fb4bc5f0	5838	const unsigned char *psk, size_t psk_len )
nexpaq	0:6c56fb4bc5f0	5839	{
nexpaq	0:6c56fb4bc5f0	5840	if( psk == NULL \|\| ssl->handshake == NULL )
nexpaq	0:6c56fb4bc5f0	5841	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
nexpaq	0:6c56fb4bc5f0	5842
nexpaq	0:6c56fb4bc5f0	5843	if( psk_len > MBEDTLS_PSK_MAX_LEN )
nexpaq	0:6c56fb4bc5f0	5844	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
nexpaq	0:6c56fb4bc5f0	5845
nexpaq	0:6c56fb4bc5f0	5846	if( ssl->handshake->psk != NULL )
nexpaq	0:6c56fb4bc5f0	5847	mbedtls_free( ssl->handshake->psk );
nexpaq	0:6c56fb4bc5f0	5848
nexpaq	0:6c56fb4bc5f0	5849	if( ( ssl->handshake->psk = mbedtls_calloc( 1, psk_len ) ) == NULL )
nexpaq	0:6c56fb4bc5f0	5850	return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
nexpaq	0:6c56fb4bc5f0	5851
nexpaq	0:6c56fb4bc5f0	5852	ssl->handshake->psk_len = psk_len;
nexpaq	0:6c56fb4bc5f0	5853	memcpy( ssl->handshake->psk, psk, ssl->handshake->psk_len );
nexpaq	0:6c56fb4bc5f0	5854
nexpaq	0:6c56fb4bc5f0	5855	return( 0 );
nexpaq	0:6c56fb4bc5f0	5856	}
nexpaq	0:6c56fb4bc5f0	5857
nexpaq	0:6c56fb4bc5f0	5858	void mbedtls_ssl_conf_psk_cb( mbedtls_ssl_config *conf,
nexpaq	0:6c56fb4bc5f0	5859	int (f_psk)(void , mbedtls_ssl_context , const unsigned char ,
nexpaq	0:6c56fb4bc5f0	5860	size_t),
nexpaq	0:6c56fb4bc5f0	5861	void *p_psk )
nexpaq	0:6c56fb4bc5f0	5862	{
nexpaq	0:6c56fb4bc5f0	5863	conf->f_psk = f_psk;
nexpaq	0:6c56fb4bc5f0	5864	conf->p_psk = p_psk;
nexpaq	0:6c56fb4bc5f0	5865	}
nexpaq	0:6c56fb4bc5f0	5866	#endif /* MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED */
nexpaq	0:6c56fb4bc5f0	5867
nexpaq	0:6c56fb4bc5f0	5868	#if defined(MBEDTLS_DHM_C) && defined(MBEDTLS_SSL_SRV_C)
nexpaq	0:6c56fb4bc5f0	5869	int mbedtls_ssl_conf_dh_param( mbedtls_ssl_config conf, const char dhm_P, const char *dhm_G )
nexpaq	0:6c56fb4bc5f0	5870	{
nexpaq	0:6c56fb4bc5f0	5871	int ret;
nexpaq	0:6c56fb4bc5f0	5872
nexpaq	0:6c56fb4bc5f0	5873	if( ( ret = mbedtls_mpi_read_string( &conf->dhm_P, 16, dhm_P ) ) != 0 \|\|
nexpaq	0:6c56fb4bc5f0	5874	( ret = mbedtls_mpi_read_string( &conf->dhm_G, 16, dhm_G ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	5875	{
nexpaq	0:6c56fb4bc5f0	5876	mbedtls_mpi_free( &conf->dhm_P );
nexpaq	0:6c56fb4bc5f0	5877	mbedtls_mpi_free( &conf->dhm_G );
nexpaq	0:6c56fb4bc5f0	5878	return( ret );
nexpaq	0:6c56fb4bc5f0	5879	}
nexpaq	0:6c56fb4bc5f0	5880
nexpaq	0:6c56fb4bc5f0	5881	return( 0 );
nexpaq	0:6c56fb4bc5f0	5882	}
nexpaq	0:6c56fb4bc5f0	5883
nexpaq	0:6c56fb4bc5f0	5884	int mbedtls_ssl_conf_dh_param_ctx( mbedtls_ssl_config conf, mbedtls_dhm_context dhm_ctx )
nexpaq	0:6c56fb4bc5f0	5885	{
nexpaq	0:6c56fb4bc5f0	5886	int ret;
nexpaq	0:6c56fb4bc5f0	5887
nexpaq	0:6c56fb4bc5f0	5888	if( ( ret = mbedtls_mpi_copy( &conf->dhm_P, &dhm_ctx->P ) ) != 0 \|\|
nexpaq	0:6c56fb4bc5f0	5889	( ret = mbedtls_mpi_copy( &conf->dhm_G, &dhm_ctx->G ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	5890	{
nexpaq	0:6c56fb4bc5f0	5891	mbedtls_mpi_free( &conf->dhm_P );
nexpaq	0:6c56fb4bc5f0	5892	mbedtls_mpi_free( &conf->dhm_G );
nexpaq	0:6c56fb4bc5f0	5893	return( ret );
nexpaq	0:6c56fb4bc5f0	5894	}
nexpaq	0:6c56fb4bc5f0	5895
nexpaq	0:6c56fb4bc5f0	5896	return( 0 );
nexpaq	0:6c56fb4bc5f0	5897	}
nexpaq	0:6c56fb4bc5f0	5898	#endif /* MBEDTLS_DHM_C && MBEDTLS_SSL_SRV_C */
nexpaq	0:6c56fb4bc5f0	5899
nexpaq	0:6c56fb4bc5f0	5900	#if defined(MBEDTLS_DHM_C) && defined(MBEDTLS_SSL_CLI_C)
nexpaq	0:6c56fb4bc5f0	5901	/*
nexpaq	0:6c56fb4bc5f0	5902	* Set the minimum length for Diffie-Hellman parameters
nexpaq	0:6c56fb4bc5f0	5903	*/
nexpaq	0:6c56fb4bc5f0	5904	void mbedtls_ssl_conf_dhm_min_bitlen( mbedtls_ssl_config *conf,
nexpaq	0:6c56fb4bc5f0	5905	unsigned int bitlen )
nexpaq	0:6c56fb4bc5f0	5906	{
nexpaq	0:6c56fb4bc5f0	5907	conf->dhm_min_bitlen = bitlen;
nexpaq	0:6c56fb4bc5f0	5908	}
nexpaq	0:6c56fb4bc5f0	5909	#endif /* MBEDTLS_DHM_C && MBEDTLS_SSL_CLI_C */
nexpaq	0:6c56fb4bc5f0	5910
nexpaq	0:6c56fb4bc5f0	5911	#if defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
nexpaq	0:6c56fb4bc5f0	5912	/*
nexpaq	0:6c56fb4bc5f0	5913	* Set allowed/preferred hashes for handshake signatures
nexpaq	0:6c56fb4bc5f0	5914	*/
nexpaq	0:6c56fb4bc5f0	5915	void mbedtls_ssl_conf_sig_hashes( mbedtls_ssl_config *conf,
nexpaq	0:6c56fb4bc5f0	5916	const int *hashes )
nexpaq	0:6c56fb4bc5f0	5917	{
nexpaq	0:6c56fb4bc5f0	5918	conf->sig_hashes = hashes;
nexpaq	0:6c56fb4bc5f0	5919	}
nexpaq	0:6c56fb4bc5f0	5920	#endif
nexpaq	0:6c56fb4bc5f0	5921
nexpaq	0:6c56fb4bc5f0	5922	#if defined(MBEDTLS_ECP_C)
nexpaq	0:6c56fb4bc5f0	5923	/*
nexpaq	0:6c56fb4bc5f0	5924	* Set the allowed elliptic curves
nexpaq	0:6c56fb4bc5f0	5925	*/
nexpaq	0:6c56fb4bc5f0	5926	void mbedtls_ssl_conf_curves( mbedtls_ssl_config *conf,
nexpaq	0:6c56fb4bc5f0	5927	const mbedtls_ecp_group_id *curve_list )
nexpaq	0:6c56fb4bc5f0	5928	{
nexpaq	0:6c56fb4bc5f0	5929	conf->curve_list = curve_list;
nexpaq	0:6c56fb4bc5f0	5930	}
nexpaq	0:6c56fb4bc5f0	5931	#endif
nexpaq	0:6c56fb4bc5f0	5932
nexpaq	0:6c56fb4bc5f0	5933	#if defined(MBEDTLS_X509_CRT_PARSE_C)
nexpaq	0:6c56fb4bc5f0	5934	int mbedtls_ssl_set_hostname( mbedtls_ssl_context ssl, const char hostname )
nexpaq	0:6c56fb4bc5f0	5935	{
nexpaq	0:6c56fb4bc5f0	5936	size_t hostname_len;
nexpaq	0:6c56fb4bc5f0	5937
nexpaq	0:6c56fb4bc5f0	5938	if( hostname == NULL )
nexpaq	0:6c56fb4bc5f0	5939	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
nexpaq	0:6c56fb4bc5f0	5940
nexpaq	0:6c56fb4bc5f0	5941	hostname_len = strlen( hostname );
nexpaq	0:6c56fb4bc5f0	5942
nexpaq	0:6c56fb4bc5f0	5943	if( hostname_len + 1 == 0 )
nexpaq	0:6c56fb4bc5f0	5944	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
nexpaq	0:6c56fb4bc5f0	5945
nexpaq	0:6c56fb4bc5f0	5946	if( hostname_len > MBEDTLS_SSL_MAX_HOST_NAME_LEN )
nexpaq	0:6c56fb4bc5f0	5947	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
nexpaq	0:6c56fb4bc5f0	5948
nexpaq	0:6c56fb4bc5f0	5949	ssl->hostname = mbedtls_calloc( 1, hostname_len + 1 );
nexpaq	0:6c56fb4bc5f0	5950
nexpaq	0:6c56fb4bc5f0	5951	if( ssl->hostname == NULL )
nexpaq	0:6c56fb4bc5f0	5952	return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
nexpaq	0:6c56fb4bc5f0	5953
nexpaq	0:6c56fb4bc5f0	5954	memcpy( ssl->hostname, hostname, hostname_len );
nexpaq	0:6c56fb4bc5f0	5955
nexpaq	0:6c56fb4bc5f0	5956	ssl->hostname[hostname_len] = '\0';
nexpaq	0:6c56fb4bc5f0	5957
nexpaq	0:6c56fb4bc5f0	5958	return( 0 );
nexpaq	0:6c56fb4bc5f0	5959	}
nexpaq	0:6c56fb4bc5f0	5960	#endif
nexpaq	0:6c56fb4bc5f0	5961
nexpaq	0:6c56fb4bc5f0	5962	#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
nexpaq	0:6c56fb4bc5f0	5963	void mbedtls_ssl_conf_sni( mbedtls_ssl_config *conf,
nexpaq	0:6c56fb4bc5f0	5964	int (f_sni)(void , mbedtls_ssl_context *,
nexpaq	0:6c56fb4bc5f0	5965	const unsigned char *, size_t),
nexpaq	0:6c56fb4bc5f0	5966	void *p_sni )
nexpaq	0:6c56fb4bc5f0	5967	{
nexpaq	0:6c56fb4bc5f0	5968	conf->f_sni = f_sni;
nexpaq	0:6c56fb4bc5f0	5969	conf->p_sni = p_sni;
nexpaq	0:6c56fb4bc5f0	5970	}
nexpaq	0:6c56fb4bc5f0	5971	#endif /* MBEDTLS_SSL_SERVER_NAME_INDICATION */
nexpaq	0:6c56fb4bc5f0	5972
nexpaq	0:6c56fb4bc5f0	5973	#if defined(MBEDTLS_SSL_ALPN)
nexpaq	0:6c56fb4bc5f0	5974	int mbedtls_ssl_conf_alpn_protocols( mbedtls_ssl_config conf, const char *protos )
nexpaq	0:6c56fb4bc5f0	5975	{
nexpaq	0:6c56fb4bc5f0	5976	size_t cur_len, tot_len;
nexpaq	0:6c56fb4bc5f0	5977	const char **p;
nexpaq	0:6c56fb4bc5f0	5978
nexpaq	0:6c56fb4bc5f0	5979	/*
nexpaq	0:6c56fb4bc5f0	5980	* "Empty strings MUST NOT be included and byte strings MUST NOT be
nexpaq	0:6c56fb4bc5f0	5981	* truncated". Check lengths now rather than later.
nexpaq	0:6c56fb4bc5f0	5982	*/
nexpaq	0:6c56fb4bc5f0	5983	tot_len = 0;
nexpaq	0:6c56fb4bc5f0	5984	for( p = protos; *p != NULL; p++ )
nexpaq	0:6c56fb4bc5f0	5985	{
nexpaq	0:6c56fb4bc5f0	5986	cur_len = strlen( *p );
nexpaq	0:6c56fb4bc5f0	5987	tot_len += cur_len;
nexpaq	0:6c56fb4bc5f0	5988
nexpaq	0:6c56fb4bc5f0	5989	if( cur_len == 0 \|\| cur_len > 255 \|\| tot_len > 65535 )
nexpaq	0:6c56fb4bc5f0	5990	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
nexpaq	0:6c56fb4bc5f0	5991	}
nexpaq	0:6c56fb4bc5f0	5992
nexpaq	0:6c56fb4bc5f0	5993	conf->alpn_list = protos;
nexpaq	0:6c56fb4bc5f0	5994
nexpaq	0:6c56fb4bc5f0	5995	return( 0 );
nexpaq	0:6c56fb4bc5f0	5996	}
nexpaq	0:6c56fb4bc5f0	5997
nexpaq	0:6c56fb4bc5f0	5998	const char mbedtls_ssl_get_alpn_protocol( const mbedtls_ssl_context ssl )
nexpaq	0:6c56fb4bc5f0	5999	{
nexpaq	0:6c56fb4bc5f0	6000	return( ssl->alpn_chosen );
nexpaq	0:6c56fb4bc5f0	6001	}
nexpaq	0:6c56fb4bc5f0	6002	#endif /* MBEDTLS_SSL_ALPN */
nexpaq	0:6c56fb4bc5f0	6003
nexpaq	0:6c56fb4bc5f0	6004	void mbedtls_ssl_conf_max_version( mbedtls_ssl_config *conf, int major, int minor )
nexpaq	0:6c56fb4bc5f0	6005	{
nexpaq	0:6c56fb4bc5f0	6006	conf->max_major_ver = major;
nexpaq	0:6c56fb4bc5f0	6007	conf->max_minor_ver = minor;
nexpaq	0:6c56fb4bc5f0	6008	}
nexpaq	0:6c56fb4bc5f0	6009
nexpaq	0:6c56fb4bc5f0	6010	void mbedtls_ssl_conf_min_version( mbedtls_ssl_config *conf, int major, int minor )
nexpaq	0:6c56fb4bc5f0	6011	{
nexpaq	0:6c56fb4bc5f0	6012	conf->min_major_ver = major;
nexpaq	0:6c56fb4bc5f0	6013	conf->min_minor_ver = minor;
nexpaq	0:6c56fb4bc5f0	6014	}
nexpaq	0:6c56fb4bc5f0	6015
nexpaq	0:6c56fb4bc5f0	6016	#if defined(MBEDTLS_SSL_FALLBACK_SCSV) && defined(MBEDTLS_SSL_CLI_C)
nexpaq	0:6c56fb4bc5f0	6017	void mbedtls_ssl_conf_fallback( mbedtls_ssl_config *conf, char fallback )
nexpaq	0:6c56fb4bc5f0	6018	{
nexpaq	0:6c56fb4bc5f0	6019	conf->fallback = fallback;
nexpaq	0:6c56fb4bc5f0	6020	}
nexpaq	0:6c56fb4bc5f0	6021	#endif
nexpaq	0:6c56fb4bc5f0	6022
nexpaq	0:6c56fb4bc5f0	6023	#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
nexpaq	0:6c56fb4bc5f0	6024	void mbedtls_ssl_conf_encrypt_then_mac( mbedtls_ssl_config *conf, char etm )
nexpaq	0:6c56fb4bc5f0	6025	{
nexpaq	0:6c56fb4bc5f0	6026	conf->encrypt_then_mac = etm;
nexpaq	0:6c56fb4bc5f0	6027	}
nexpaq	0:6c56fb4bc5f0	6028	#endif
nexpaq	0:6c56fb4bc5f0	6029
nexpaq	0:6c56fb4bc5f0	6030	#if defined(MBEDTLS_SSL_EXTENDED_MASTER_SECRET)
nexpaq	0:6c56fb4bc5f0	6031	void mbedtls_ssl_conf_extended_master_secret( mbedtls_ssl_config *conf, char ems )
nexpaq	0:6c56fb4bc5f0	6032	{
nexpaq	0:6c56fb4bc5f0	6033	conf->extended_ms = ems;
nexpaq	0:6c56fb4bc5f0	6034	}
nexpaq	0:6c56fb4bc5f0	6035	#endif
nexpaq	0:6c56fb4bc5f0	6036
nexpaq	0:6c56fb4bc5f0	6037	#if defined(MBEDTLS_ARC4_C)
nexpaq	0:6c56fb4bc5f0	6038	void mbedtls_ssl_conf_arc4_support( mbedtls_ssl_config *conf, char arc4 )
nexpaq	0:6c56fb4bc5f0	6039	{
nexpaq	0:6c56fb4bc5f0	6040	conf->arc4_disabled = arc4;
nexpaq	0:6c56fb4bc5f0	6041	}
nexpaq	0:6c56fb4bc5f0	6042	#endif
nexpaq	0:6c56fb4bc5f0	6043
nexpaq	0:6c56fb4bc5f0	6044	#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
nexpaq	0:6c56fb4bc5f0	6045	int mbedtls_ssl_conf_max_frag_len( mbedtls_ssl_config *conf, unsigned char mfl_code )
nexpaq	0:6c56fb4bc5f0	6046	{
nexpaq	0:6c56fb4bc5f0	6047	if( mfl_code >= MBEDTLS_SSL_MAX_FRAG_LEN_INVALID \|\|
nexpaq	0:6c56fb4bc5f0	6048	mfl_code_to_length[mfl_code] > MBEDTLS_SSL_MAX_CONTENT_LEN )
nexpaq	0:6c56fb4bc5f0	6049	{
nexpaq	0:6c56fb4bc5f0	6050	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
nexpaq	0:6c56fb4bc5f0	6051	}
nexpaq	0:6c56fb4bc5f0	6052
nexpaq	0:6c56fb4bc5f0	6053	conf->mfl_code = mfl_code;
nexpaq	0:6c56fb4bc5f0	6054
nexpaq	0:6c56fb4bc5f0	6055	return( 0 );
nexpaq	0:6c56fb4bc5f0	6056	}
nexpaq	0:6c56fb4bc5f0	6057	#endif /* MBEDTLS_SSL_MAX_FRAGMENT_LENGTH */
nexpaq	0:6c56fb4bc5f0	6058
nexpaq	0:6c56fb4bc5f0	6059	#if defined(MBEDTLS_SSL_TRUNCATED_HMAC)
nexpaq	0:6c56fb4bc5f0	6060	void mbedtls_ssl_conf_truncated_hmac( mbedtls_ssl_config *conf, int truncate )
nexpaq	0:6c56fb4bc5f0	6061	{
nexpaq	0:6c56fb4bc5f0	6062	conf->trunc_hmac = truncate;
nexpaq	0:6c56fb4bc5f0	6063	}
nexpaq	0:6c56fb4bc5f0	6064	#endif /* MBEDTLS_SSL_TRUNCATED_HMAC */
nexpaq	0:6c56fb4bc5f0	6065
nexpaq	0:6c56fb4bc5f0	6066	#if defined(MBEDTLS_SSL_CBC_RECORD_SPLITTING)
nexpaq	0:6c56fb4bc5f0	6067	void mbedtls_ssl_conf_cbc_record_splitting( mbedtls_ssl_config *conf, char split )
nexpaq	0:6c56fb4bc5f0	6068	{
nexpaq	0:6c56fb4bc5f0	6069	conf->cbc_record_splitting = split;
nexpaq	0:6c56fb4bc5f0	6070	}
nexpaq	0:6c56fb4bc5f0	6071	#endif
nexpaq	0:6c56fb4bc5f0	6072
nexpaq	0:6c56fb4bc5f0	6073	void mbedtls_ssl_conf_legacy_renegotiation( mbedtls_ssl_config *conf, int allow_legacy )
nexpaq	0:6c56fb4bc5f0	6074	{
nexpaq	0:6c56fb4bc5f0	6075	conf->allow_legacy_renegotiation = allow_legacy;
nexpaq	0:6c56fb4bc5f0	6076	}
nexpaq	0:6c56fb4bc5f0	6077
nexpaq	0:6c56fb4bc5f0	6078	#if defined(MBEDTLS_SSL_RENEGOTIATION)
nexpaq	0:6c56fb4bc5f0	6079	void mbedtls_ssl_conf_renegotiation( mbedtls_ssl_config *conf, int renegotiation )
nexpaq	0:6c56fb4bc5f0	6080	{
nexpaq	0:6c56fb4bc5f0	6081	conf->disable_renegotiation = renegotiation;
nexpaq	0:6c56fb4bc5f0	6082	}
nexpaq	0:6c56fb4bc5f0	6083
nexpaq	0:6c56fb4bc5f0	6084	void mbedtls_ssl_conf_renegotiation_enforced( mbedtls_ssl_config *conf, int max_records )
nexpaq	0:6c56fb4bc5f0	6085	{
nexpaq	0:6c56fb4bc5f0	6086	conf->renego_max_records = max_records;
nexpaq	0:6c56fb4bc5f0	6087	}
nexpaq	0:6c56fb4bc5f0	6088
nexpaq	0:6c56fb4bc5f0	6089	void mbedtls_ssl_conf_renegotiation_period( mbedtls_ssl_config *conf,
nexpaq	0:6c56fb4bc5f0	6090	const unsigned char period[8] )
nexpaq	0:6c56fb4bc5f0	6091	{
nexpaq	0:6c56fb4bc5f0	6092	memcpy( conf->renego_period, period, 8 );
nexpaq	0:6c56fb4bc5f0	6093	}
nexpaq	0:6c56fb4bc5f0	6094	#endif /* MBEDTLS_SSL_RENEGOTIATION */
nexpaq	0:6c56fb4bc5f0	6095
nexpaq	0:6c56fb4bc5f0	6096	#if defined(MBEDTLS_SSL_SESSION_TICKETS)
nexpaq	0:6c56fb4bc5f0	6097	#if defined(MBEDTLS_SSL_CLI_C)
nexpaq	0:6c56fb4bc5f0	6098	void mbedtls_ssl_conf_session_tickets( mbedtls_ssl_config *conf, int use_tickets )
nexpaq	0:6c56fb4bc5f0	6099	{
nexpaq	0:6c56fb4bc5f0	6100	conf->session_tickets = use_tickets;
nexpaq	0:6c56fb4bc5f0	6101	}
nexpaq	0:6c56fb4bc5f0	6102	#endif
nexpaq	0:6c56fb4bc5f0	6103
nexpaq	0:6c56fb4bc5f0	6104	#if defined(MBEDTLS_SSL_SRV_C)
nexpaq	0:6c56fb4bc5f0	6105	void mbedtls_ssl_conf_session_tickets_cb( mbedtls_ssl_config *conf,
nexpaq	0:6c56fb4bc5f0	6106	mbedtls_ssl_ticket_write_t *f_ticket_write,
nexpaq	0:6c56fb4bc5f0	6107	mbedtls_ssl_ticket_parse_t *f_ticket_parse,
nexpaq	0:6c56fb4bc5f0	6108	void *p_ticket )
nexpaq	0:6c56fb4bc5f0	6109	{
nexpaq	0:6c56fb4bc5f0	6110	conf->f_ticket_write = f_ticket_write;
nexpaq	0:6c56fb4bc5f0	6111	conf->f_ticket_parse = f_ticket_parse;
nexpaq	0:6c56fb4bc5f0	6112	conf->p_ticket = p_ticket;
nexpaq	0:6c56fb4bc5f0	6113	}
nexpaq	0:6c56fb4bc5f0	6114	#endif
nexpaq	0:6c56fb4bc5f0	6115	#endif /* MBEDTLS_SSL_SESSION_TICKETS */
nexpaq	0:6c56fb4bc5f0	6116
nexpaq	0:6c56fb4bc5f0	6117	#if defined(MBEDTLS_SSL_EXPORT_KEYS)
nexpaq	0:6c56fb4bc5f0	6118	void mbedtls_ssl_conf_export_keys_cb( mbedtls_ssl_config *conf,
nexpaq	0:6c56fb4bc5f0	6119	mbedtls_ssl_export_keys_t *f_export_keys,
nexpaq	0:6c56fb4bc5f0	6120	void *p_export_keys )
nexpaq	0:6c56fb4bc5f0	6121	{
nexpaq	0:6c56fb4bc5f0	6122	conf->f_export_keys = f_export_keys;
nexpaq	0:6c56fb4bc5f0	6123	conf->p_export_keys = p_export_keys;
nexpaq	0:6c56fb4bc5f0	6124	}
nexpaq	0:6c56fb4bc5f0	6125	#endif
nexpaq	0:6c56fb4bc5f0	6126
nexpaq	0:6c56fb4bc5f0	6127	/*
nexpaq	0:6c56fb4bc5f0	6128	* SSL get accessors
nexpaq	0:6c56fb4bc5f0	6129	*/
nexpaq	0:6c56fb4bc5f0	6130	size_t mbedtls_ssl_get_bytes_avail( const mbedtls_ssl_context *ssl )
nexpaq	0:6c56fb4bc5f0	6131	{
nexpaq	0:6c56fb4bc5f0	6132	return( ssl->in_offt == NULL ? 0 : ssl->in_msglen );
nexpaq	0:6c56fb4bc5f0	6133	}
nexpaq	0:6c56fb4bc5f0	6134
nexpaq	0:6c56fb4bc5f0	6135	uint32_t mbedtls_ssl_get_verify_result( const mbedtls_ssl_context *ssl )
nexpaq	0:6c56fb4bc5f0	6136	{
nexpaq	0:6c56fb4bc5f0	6137	if( ssl->session != NULL )
nexpaq	0:6c56fb4bc5f0	6138	return( ssl->session->verify_result );
nexpaq	0:6c56fb4bc5f0	6139
nexpaq	0:6c56fb4bc5f0	6140	if( ssl->session_negotiate != NULL )
nexpaq	0:6c56fb4bc5f0	6141	return( ssl->session_negotiate->verify_result );
nexpaq	0:6c56fb4bc5f0	6142
nexpaq	0:6c56fb4bc5f0	6143	return( 0xFFFFFFFF );
nexpaq	0:6c56fb4bc5f0	6144	}
nexpaq	0:6c56fb4bc5f0	6145
nexpaq	0:6c56fb4bc5f0	6146	const char mbedtls_ssl_get_ciphersuite( const mbedtls_ssl_context ssl )
nexpaq	0:6c56fb4bc5f0	6147	{
nexpaq	0:6c56fb4bc5f0	6148	if( ssl == NULL \|\| ssl->session == NULL )
nexpaq	0:6c56fb4bc5f0	6149	return( NULL );
nexpaq	0:6c56fb4bc5f0	6150
nexpaq	0:6c56fb4bc5f0	6151	return mbedtls_ssl_get_ciphersuite_name( ssl->session->ciphersuite );
nexpaq	0:6c56fb4bc5f0	6152	}
nexpaq	0:6c56fb4bc5f0	6153
nexpaq	0:6c56fb4bc5f0	6154	const char mbedtls_ssl_get_version( const mbedtls_ssl_context ssl )
nexpaq	0:6c56fb4bc5f0	6155	{
nexpaq	0:6c56fb4bc5f0	6156	#if defined(MBEDTLS_SSL_PROTO_DTLS)
nexpaq	0:6c56fb4bc5f0	6157	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
nexpaq	0:6c56fb4bc5f0	6158	{
nexpaq	0:6c56fb4bc5f0	6159	switch( ssl->minor_ver )
nexpaq	0:6c56fb4bc5f0	6160	{
nexpaq	0:6c56fb4bc5f0	6161	case MBEDTLS_SSL_MINOR_VERSION_2:
nexpaq	0:6c56fb4bc5f0	6162	return( "DTLSv1.0" );
nexpaq	0:6c56fb4bc5f0	6163
nexpaq	0:6c56fb4bc5f0	6164	case MBEDTLS_SSL_MINOR_VERSION_3:
nexpaq	0:6c56fb4bc5f0	6165	return( "DTLSv1.2" );
nexpaq	0:6c56fb4bc5f0	6166
nexpaq	0:6c56fb4bc5f0	6167	default:
nexpaq	0:6c56fb4bc5f0	6168	return( "unknown (DTLS)" );
nexpaq	0:6c56fb4bc5f0	6169	}
nexpaq	0:6c56fb4bc5f0	6170	}
nexpaq	0:6c56fb4bc5f0	6171	#endif
nexpaq	0:6c56fb4bc5f0	6172
nexpaq	0:6c56fb4bc5f0	6173	switch( ssl->minor_ver )
nexpaq	0:6c56fb4bc5f0	6174	{
nexpaq	0:6c56fb4bc5f0	6175	case MBEDTLS_SSL_MINOR_VERSION_0:
nexpaq	0:6c56fb4bc5f0	6176	return( "SSLv3.0" );
nexpaq	0:6c56fb4bc5f0	6177
nexpaq	0:6c56fb4bc5f0	6178	case MBEDTLS_SSL_MINOR_VERSION_1:
nexpaq	0:6c56fb4bc5f0	6179	return( "TLSv1.0" );
nexpaq	0:6c56fb4bc5f0	6180
nexpaq	0:6c56fb4bc5f0	6181	case MBEDTLS_SSL_MINOR_VERSION_2:
nexpaq	0:6c56fb4bc5f0	6182	return( "TLSv1.1" );
nexpaq	0:6c56fb4bc5f0	6183
nexpaq	0:6c56fb4bc5f0	6184	case MBEDTLS_SSL_MINOR_VERSION_3:
nexpaq	0:6c56fb4bc5f0	6185	return( "TLSv1.2" );
nexpaq	0:6c56fb4bc5f0	6186
nexpaq	0:6c56fb4bc5f0	6187	default:
nexpaq	0:6c56fb4bc5f0	6188	return( "unknown" );
nexpaq	0:6c56fb4bc5f0	6189	}
nexpaq	0:6c56fb4bc5f0	6190	}
nexpaq	0:6c56fb4bc5f0	6191
nexpaq	0:6c56fb4bc5f0	6192	int mbedtls_ssl_get_record_expansion( const mbedtls_ssl_context *ssl )
nexpaq	0:6c56fb4bc5f0	6193	{
nexpaq	0:6c56fb4bc5f0	6194	size_t transform_expansion;
nexpaq	0:6c56fb4bc5f0	6195	const mbedtls_ssl_transform *transform = ssl->transform_out;
nexpaq	0:6c56fb4bc5f0	6196
nexpaq	0:6c56fb4bc5f0	6197	#if defined(MBEDTLS_ZLIB_SUPPORT)
nexpaq	0:6c56fb4bc5f0	6198	if( ssl->session_out->compression != MBEDTLS_SSL_COMPRESS_NULL )
nexpaq	0:6c56fb4bc5f0	6199	return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE );
nexpaq	0:6c56fb4bc5f0	6200	#endif
nexpaq	0:6c56fb4bc5f0	6201
nexpaq	0:6c56fb4bc5f0	6202	if( transform == NULL )
nexpaq	0:6c56fb4bc5f0	6203	return( (int) mbedtls_ssl_hdr_len( ssl ) );
nexpaq	0:6c56fb4bc5f0	6204
nexpaq	0:6c56fb4bc5f0	6205	switch( mbedtls_cipher_get_cipher_mode( &transform->cipher_ctx_enc ) )
nexpaq	0:6c56fb4bc5f0	6206	{
nexpaq	0:6c56fb4bc5f0	6207	case MBEDTLS_MODE_GCM:
nexpaq	0:6c56fb4bc5f0	6208	case MBEDTLS_MODE_CCM:
nexpaq	0:6c56fb4bc5f0	6209	case MBEDTLS_MODE_STREAM:
nexpaq	0:6c56fb4bc5f0	6210	transform_expansion = transform->minlen;
nexpaq	0:6c56fb4bc5f0	6211	break;
nexpaq	0:6c56fb4bc5f0	6212
nexpaq	0:6c56fb4bc5f0	6213	case MBEDTLS_MODE_CBC:
nexpaq	0:6c56fb4bc5f0	6214	transform_expansion = transform->maclen
nexpaq	0:6c56fb4bc5f0	6215	+ mbedtls_cipher_get_block_size( &transform->cipher_ctx_enc );
nexpaq	0:6c56fb4bc5f0	6216	break;
nexpaq	0:6c56fb4bc5f0	6217
nexpaq	0:6c56fb4bc5f0	6218	default:
nexpaq	0:6c56fb4bc5f0	6219	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
nexpaq	0:6c56fb4bc5f0	6220	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
nexpaq	0:6c56fb4bc5f0	6221	}
nexpaq	0:6c56fb4bc5f0	6222
nexpaq	0:6c56fb4bc5f0	6223	return( (int)( mbedtls_ssl_hdr_len( ssl ) + transform_expansion ) );
nexpaq	0:6c56fb4bc5f0	6224	}
nexpaq	0:6c56fb4bc5f0	6225
nexpaq	0:6c56fb4bc5f0	6226	#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
nexpaq	0:6c56fb4bc5f0	6227	size_t mbedtls_ssl_get_max_frag_len( const mbedtls_ssl_context *ssl )
nexpaq	0:6c56fb4bc5f0	6228	{
nexpaq	0:6c56fb4bc5f0	6229	size_t max_len;
nexpaq	0:6c56fb4bc5f0	6230
nexpaq	0:6c56fb4bc5f0	6231	/*
nexpaq	0:6c56fb4bc5f0	6232	* Assume mfl_code is correct since it was checked when set
nexpaq	0:6c56fb4bc5f0	6233	*/
nexpaq	0:6c56fb4bc5f0	6234	max_len = mfl_code_to_length[ssl->conf->mfl_code];
nexpaq	0:6c56fb4bc5f0	6235
nexpaq	0:6c56fb4bc5f0	6236	/*
nexpaq	0:6c56fb4bc5f0	6237	* Check if a smaller max length was negotiated
nexpaq	0:6c56fb4bc5f0	6238	*/
nexpaq	0:6c56fb4bc5f0	6239	if( ssl->session_out != NULL &&
nexpaq	0:6c56fb4bc5f0	6240	mfl_code_to_length[ssl->session_out->mfl_code] < max_len )
nexpaq	0:6c56fb4bc5f0	6241	{
nexpaq	0:6c56fb4bc5f0	6242	max_len = mfl_code_to_length[ssl->session_out->mfl_code];
nexpaq	0:6c56fb4bc5f0	6243	}
nexpaq	0:6c56fb4bc5f0	6244
nexpaq	0:6c56fb4bc5f0	6245	return max_len;
nexpaq	0:6c56fb4bc5f0	6246	}
nexpaq	0:6c56fb4bc5f0	6247	#endif /* MBEDTLS_SSL_MAX_FRAGMENT_LENGTH */
nexpaq	0:6c56fb4bc5f0	6248
nexpaq	0:6c56fb4bc5f0	6249	#if defined(MBEDTLS_X509_CRT_PARSE_C)
nexpaq	0:6c56fb4bc5f0	6250	const mbedtls_x509_crt mbedtls_ssl_get_peer_cert( const mbedtls_ssl_context ssl )
nexpaq	0:6c56fb4bc5f0	6251	{
nexpaq	0:6c56fb4bc5f0	6252	if( ssl == NULL \|\| ssl->session == NULL )
nexpaq	0:6c56fb4bc5f0	6253	return( NULL );
nexpaq	0:6c56fb4bc5f0	6254
nexpaq	0:6c56fb4bc5f0	6255	return( ssl->session->peer_cert );
nexpaq	0:6c56fb4bc5f0	6256	}
nexpaq	0:6c56fb4bc5f0	6257	#endif /* MBEDTLS_X509_CRT_PARSE_C */
nexpaq	0:6c56fb4bc5f0	6258
nexpaq	0:6c56fb4bc5f0	6259	#if defined(MBEDTLS_SSL_CLI_C)
nexpaq	0:6c56fb4bc5f0	6260	int mbedtls_ssl_get_session( const mbedtls_ssl_context ssl, mbedtls_ssl_session dst )
nexpaq	0:6c56fb4bc5f0	6261	{
nexpaq	0:6c56fb4bc5f0	6262	if( ssl == NULL \|\|
nexpaq	0:6c56fb4bc5f0	6263	dst == NULL \|\|
nexpaq	0:6c56fb4bc5f0	6264	ssl->session == NULL \|\|
nexpaq	0:6c56fb4bc5f0	6265	ssl->conf->endpoint != MBEDTLS_SSL_IS_CLIENT )
nexpaq	0:6c56fb4bc5f0	6266	{
nexpaq	0:6c56fb4bc5f0	6267	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
nexpaq	0:6c56fb4bc5f0	6268	}
nexpaq	0:6c56fb4bc5f0	6269
nexpaq	0:6c56fb4bc5f0	6270	return( ssl_session_copy( dst, ssl->session ) );
nexpaq	0:6c56fb4bc5f0	6271	}
nexpaq	0:6c56fb4bc5f0	6272	#endif /* MBEDTLS_SSL_CLI_C */
nexpaq	0:6c56fb4bc5f0	6273
nexpaq	0:6c56fb4bc5f0	6274	/*
nexpaq	0:6c56fb4bc5f0	6275	* Perform a single step of the SSL handshake
nexpaq	0:6c56fb4bc5f0	6276	*/
nexpaq	0:6c56fb4bc5f0	6277	int mbedtls_ssl_handshake_step( mbedtls_ssl_context *ssl )
nexpaq	0:6c56fb4bc5f0	6278	{
nexpaq	0:6c56fb4bc5f0	6279	int ret = MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE;
nexpaq	0:6c56fb4bc5f0	6280
nexpaq	0:6c56fb4bc5f0	6281	if( ssl == NULL \|\| ssl->conf == NULL )
nexpaq	0:6c56fb4bc5f0	6282	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
nexpaq	0:6c56fb4bc5f0	6283
nexpaq	0:6c56fb4bc5f0	6284	#if defined(MBEDTLS_SSL_CLI_C)
nexpaq	0:6c56fb4bc5f0	6285	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_CLIENT )
nexpaq	0:6c56fb4bc5f0	6286	ret = mbedtls_ssl_handshake_client_step( ssl );
nexpaq	0:6c56fb4bc5f0	6287	#endif
nexpaq	0:6c56fb4bc5f0	6288	#if defined(MBEDTLS_SSL_SRV_C)
nexpaq	0:6c56fb4bc5f0	6289	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER )
nexpaq	0:6c56fb4bc5f0	6290	ret = mbedtls_ssl_handshake_server_step( ssl );
nexpaq	0:6c56fb4bc5f0	6291	#endif
nexpaq	0:6c56fb4bc5f0	6292
nexpaq	0:6c56fb4bc5f0	6293	return( ret );
nexpaq	0:6c56fb4bc5f0	6294	}
nexpaq	0:6c56fb4bc5f0	6295
nexpaq	0:6c56fb4bc5f0	6296	/*
nexpaq	0:6c56fb4bc5f0	6297	* Perform the SSL handshake
nexpaq	0:6c56fb4bc5f0	6298	*/
nexpaq	0:6c56fb4bc5f0	6299	int mbedtls_ssl_handshake( mbedtls_ssl_context *ssl )
nexpaq	0:6c56fb4bc5f0	6300	{
nexpaq	0:6c56fb4bc5f0	6301	int ret = 0;
nexpaq	0:6c56fb4bc5f0	6302
nexpaq	0:6c56fb4bc5f0	6303	if( ssl == NULL \|\| ssl->conf == NULL )
nexpaq	0:6c56fb4bc5f0	6304	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
nexpaq	0:6c56fb4bc5f0	6305
nexpaq	0:6c56fb4bc5f0	6306	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> handshake" ) );
nexpaq	0:6c56fb4bc5f0	6307
nexpaq	0:6c56fb4bc5f0	6308	while( ssl->state != MBEDTLS_SSL_HANDSHAKE_OVER )
nexpaq	0:6c56fb4bc5f0	6309	{
nexpaq	0:6c56fb4bc5f0	6310	ret = mbedtls_ssl_handshake_step( ssl );
nexpaq	0:6c56fb4bc5f0	6311
nexpaq	0:6c56fb4bc5f0	6312	if( ret != 0 )
nexpaq	0:6c56fb4bc5f0	6313	break;
nexpaq	0:6c56fb4bc5f0	6314	}
nexpaq	0:6c56fb4bc5f0	6315
nexpaq	0:6c56fb4bc5f0	6316	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= handshake" ) );
nexpaq	0:6c56fb4bc5f0	6317
nexpaq	0:6c56fb4bc5f0	6318	return( ret );
nexpaq	0:6c56fb4bc5f0	6319	}
nexpaq	0:6c56fb4bc5f0	6320
nexpaq	0:6c56fb4bc5f0	6321	#if defined(MBEDTLS_SSL_RENEGOTIATION)
nexpaq	0:6c56fb4bc5f0	6322	#if defined(MBEDTLS_SSL_SRV_C)
nexpaq	0:6c56fb4bc5f0	6323	/*
nexpaq	0:6c56fb4bc5f0	6324	* Write HelloRequest to request renegotiation on server
nexpaq	0:6c56fb4bc5f0	6325	*/
nexpaq	0:6c56fb4bc5f0	6326	static int ssl_write_hello_request( mbedtls_ssl_context *ssl )
nexpaq	0:6c56fb4bc5f0	6327	{
nexpaq	0:6c56fb4bc5f0	6328	int ret;
nexpaq	0:6c56fb4bc5f0	6329
nexpaq	0:6c56fb4bc5f0	6330	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write hello request" ) );
nexpaq	0:6c56fb4bc5f0	6331
nexpaq	0:6c56fb4bc5f0	6332	ssl->out_msglen = 4;
nexpaq	0:6c56fb4bc5f0	6333	ssl->out_msgtype = MBEDTLS_SSL_MSG_HANDSHAKE;
nexpaq	0:6c56fb4bc5f0	6334	ssl->out_msg[0] = MBEDTLS_SSL_HS_HELLO_REQUEST;
nexpaq	0:6c56fb4bc5f0	6335
nexpaq	0:6c56fb4bc5f0	6336	if( ( ret = mbedtls_ssl_write_record( ssl ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	6337	{
nexpaq	0:6c56fb4bc5f0	6338	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_write_record", ret );
nexpaq	0:6c56fb4bc5f0	6339	return( ret );
nexpaq	0:6c56fb4bc5f0	6340	}
nexpaq	0:6c56fb4bc5f0	6341
nexpaq	0:6c56fb4bc5f0	6342	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= write hello request" ) );
nexpaq	0:6c56fb4bc5f0	6343
nexpaq	0:6c56fb4bc5f0	6344	return( 0 );
nexpaq	0:6c56fb4bc5f0	6345	}
nexpaq	0:6c56fb4bc5f0	6346	#endif /* MBEDTLS_SSL_SRV_C */
nexpaq	0:6c56fb4bc5f0	6347
nexpaq	0:6c56fb4bc5f0	6348	/*
nexpaq	0:6c56fb4bc5f0	6349	* Actually renegotiate current connection, triggered by either:
nexpaq	0:6c56fb4bc5f0	6350	* - any side: calling mbedtls_ssl_renegotiate(),
nexpaq	0:6c56fb4bc5f0	6351	* - client: receiving a HelloRequest during mbedtls_ssl_read(),
nexpaq	0:6c56fb4bc5f0	6352	* - server: receiving any handshake message on server during mbedtls_ssl_read() after
nexpaq	0:6c56fb4bc5f0	6353	* the initial handshake is completed.
nexpaq	0:6c56fb4bc5f0	6354	* If the handshake doesn't complete due to waiting for I/O, it will continue
nexpaq	0:6c56fb4bc5f0	6355	* during the next calls to mbedtls_ssl_renegotiate() or mbedtls_ssl_read() respectively.
nexpaq	0:6c56fb4bc5f0	6356	*/
nexpaq	0:6c56fb4bc5f0	6357	static int ssl_start_renegotiation( mbedtls_ssl_context *ssl )
nexpaq	0:6c56fb4bc5f0	6358	{
nexpaq	0:6c56fb4bc5f0	6359	int ret;
nexpaq	0:6c56fb4bc5f0	6360
nexpaq	0:6c56fb4bc5f0	6361	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> renegotiate" ) );
nexpaq	0:6c56fb4bc5f0	6362
nexpaq	0:6c56fb4bc5f0	6363	if( ( ret = ssl_handshake_init( ssl ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	6364	return( ret );
nexpaq	0:6c56fb4bc5f0	6365
nexpaq	0:6c56fb4bc5f0	6366	/* RFC 6347 4.2.2: "[...] the HelloRequest will have message_seq = 0 and
nexpaq	0:6c56fb4bc5f0	6367	* the ServerHello will have message_seq = 1" */
nexpaq	0:6c56fb4bc5f0	6368	#if defined(MBEDTLS_SSL_PROTO_DTLS)
nexpaq	0:6c56fb4bc5f0	6369	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM &&
nexpaq	0:6c56fb4bc5f0	6370	ssl->renego_status == MBEDTLS_SSL_RENEGOTIATION_PENDING )
nexpaq	0:6c56fb4bc5f0	6371	{
nexpaq	0:6c56fb4bc5f0	6372	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER )
nexpaq	0:6c56fb4bc5f0	6373	ssl->handshake->out_msg_seq = 1;
nexpaq	0:6c56fb4bc5f0	6374	else
nexpaq	0:6c56fb4bc5f0	6375	ssl->handshake->in_msg_seq = 1;
nexpaq	0:6c56fb4bc5f0	6376	}
nexpaq	0:6c56fb4bc5f0	6377	#endif
nexpaq	0:6c56fb4bc5f0	6378
nexpaq	0:6c56fb4bc5f0	6379	ssl->state = MBEDTLS_SSL_HELLO_REQUEST;
nexpaq	0:6c56fb4bc5f0	6380	ssl->renego_status = MBEDTLS_SSL_RENEGOTIATION_IN_PROGRESS;
nexpaq	0:6c56fb4bc5f0	6381
nexpaq	0:6c56fb4bc5f0	6382	if( ( ret = mbedtls_ssl_handshake( ssl ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	6383	{
nexpaq	0:6c56fb4bc5f0	6384	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_handshake", ret );
nexpaq	0:6c56fb4bc5f0	6385	return( ret );
nexpaq	0:6c56fb4bc5f0	6386	}
nexpaq	0:6c56fb4bc5f0	6387
nexpaq	0:6c56fb4bc5f0	6388	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= renegotiate" ) );
nexpaq	0:6c56fb4bc5f0	6389
nexpaq	0:6c56fb4bc5f0	6390	return( 0 );
nexpaq	0:6c56fb4bc5f0	6391	}
nexpaq	0:6c56fb4bc5f0	6392
nexpaq	0:6c56fb4bc5f0	6393	/*
nexpaq	0:6c56fb4bc5f0	6394	* Renegotiate current connection on client,
nexpaq	0:6c56fb4bc5f0	6395	* or request renegotiation on server
nexpaq	0:6c56fb4bc5f0	6396	*/
nexpaq	0:6c56fb4bc5f0	6397	int mbedtls_ssl_renegotiate( mbedtls_ssl_context *ssl )
nexpaq	0:6c56fb4bc5f0	6398	{
nexpaq	0:6c56fb4bc5f0	6399	int ret = MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE;
nexpaq	0:6c56fb4bc5f0	6400
nexpaq	0:6c56fb4bc5f0	6401	if( ssl == NULL \|\| ssl->conf == NULL )
nexpaq	0:6c56fb4bc5f0	6402	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
nexpaq	0:6c56fb4bc5f0	6403
nexpaq	0:6c56fb4bc5f0	6404	#if defined(MBEDTLS_SSL_SRV_C)
nexpaq	0:6c56fb4bc5f0	6405	/* On server, just send the request */
nexpaq	0:6c56fb4bc5f0	6406	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER )
nexpaq	0:6c56fb4bc5f0	6407	{
nexpaq	0:6c56fb4bc5f0	6408	if( ssl->state != MBEDTLS_SSL_HANDSHAKE_OVER )
nexpaq	0:6c56fb4bc5f0	6409	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
nexpaq	0:6c56fb4bc5f0	6410
nexpaq	0:6c56fb4bc5f0	6411	ssl->renego_status = MBEDTLS_SSL_RENEGOTIATION_PENDING;
nexpaq	0:6c56fb4bc5f0	6412
nexpaq	0:6c56fb4bc5f0	6413	/* Did we already try/start sending HelloRequest? */
nexpaq	0:6c56fb4bc5f0	6414	if( ssl->out_left != 0 )
nexpaq	0:6c56fb4bc5f0	6415	return( mbedtls_ssl_flush_output( ssl ) );
nexpaq	0:6c56fb4bc5f0	6416
nexpaq	0:6c56fb4bc5f0	6417	return( ssl_write_hello_request( ssl ) );
nexpaq	0:6c56fb4bc5f0	6418	}
nexpaq	0:6c56fb4bc5f0	6419	#endif /* MBEDTLS_SSL_SRV_C */
nexpaq	0:6c56fb4bc5f0	6420
nexpaq	0:6c56fb4bc5f0	6421	#if defined(MBEDTLS_SSL_CLI_C)
nexpaq	0:6c56fb4bc5f0	6422	/*
nexpaq	0:6c56fb4bc5f0	6423	* On client, either start the renegotiation process or,
nexpaq	0:6c56fb4bc5f0	6424	* if already in progress, continue the handshake
nexpaq	0:6c56fb4bc5f0	6425	*/
nexpaq	0:6c56fb4bc5f0	6426	if( ssl->renego_status != MBEDTLS_SSL_RENEGOTIATION_IN_PROGRESS )
nexpaq	0:6c56fb4bc5f0	6427	{
nexpaq	0:6c56fb4bc5f0	6428	if( ssl->state != MBEDTLS_SSL_HANDSHAKE_OVER )
nexpaq	0:6c56fb4bc5f0	6429	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
nexpaq	0:6c56fb4bc5f0	6430
nexpaq	0:6c56fb4bc5f0	6431	if( ( ret = ssl_start_renegotiation( ssl ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	6432	{
nexpaq	0:6c56fb4bc5f0	6433	MBEDTLS_SSL_DEBUG_RET( 1, "ssl_start_renegotiation", ret );
nexpaq	0:6c56fb4bc5f0	6434	return( ret );
nexpaq	0:6c56fb4bc5f0	6435	}
nexpaq	0:6c56fb4bc5f0	6436	}
nexpaq	0:6c56fb4bc5f0	6437	else
nexpaq	0:6c56fb4bc5f0	6438	{
nexpaq	0:6c56fb4bc5f0	6439	if( ( ret = mbedtls_ssl_handshake( ssl ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	6440	{
nexpaq	0:6c56fb4bc5f0	6441	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_handshake", ret );
nexpaq	0:6c56fb4bc5f0	6442	return( ret );
nexpaq	0:6c56fb4bc5f0	6443	}
nexpaq	0:6c56fb4bc5f0	6444	}
nexpaq	0:6c56fb4bc5f0	6445	#endif /* MBEDTLS_SSL_CLI_C */
nexpaq	0:6c56fb4bc5f0	6446
nexpaq	0:6c56fb4bc5f0	6447	return( ret );
nexpaq	0:6c56fb4bc5f0	6448	}
nexpaq	0:6c56fb4bc5f0	6449
nexpaq	0:6c56fb4bc5f0	6450	/*
nexpaq	0:6c56fb4bc5f0	6451	* Check record counters and renegotiate if they're above the limit.
nexpaq	0:6c56fb4bc5f0	6452	*/
nexpaq	0:6c56fb4bc5f0	6453	static int ssl_check_ctr_renegotiate( mbedtls_ssl_context *ssl )
nexpaq	0:6c56fb4bc5f0	6454	{
nexpaq	0:6c56fb4bc5f0	6455	if( ssl->state != MBEDTLS_SSL_HANDSHAKE_OVER \|\|
nexpaq	0:6c56fb4bc5f0	6456	ssl->renego_status == MBEDTLS_SSL_RENEGOTIATION_PENDING \|\|
nexpaq	0:6c56fb4bc5f0	6457	ssl->conf->disable_renegotiation == MBEDTLS_SSL_RENEGOTIATION_DISABLED )
nexpaq	0:6c56fb4bc5f0	6458	{
nexpaq	0:6c56fb4bc5f0	6459	return( 0 );
nexpaq	0:6c56fb4bc5f0	6460	}
nexpaq	0:6c56fb4bc5f0	6461
nexpaq	0:6c56fb4bc5f0	6462	if( memcmp( ssl->in_ctr, ssl->conf->renego_period, 8 ) <= 0 &&
nexpaq	0:6c56fb4bc5f0	6463	memcmp( ssl->out_ctr, ssl->conf->renego_period, 8 ) <= 0 )
nexpaq	0:6c56fb4bc5f0	6464	{
nexpaq	0:6c56fb4bc5f0	6465	return( 0 );
nexpaq	0:6c56fb4bc5f0	6466	}
nexpaq	0:6c56fb4bc5f0	6467
nexpaq	0:6c56fb4bc5f0	6468	MBEDTLS_SSL_DEBUG_MSG( 1, ( "record counter limit reached: renegotiate" ) );
nexpaq	0:6c56fb4bc5f0	6469	return( mbedtls_ssl_renegotiate( ssl ) );
nexpaq	0:6c56fb4bc5f0	6470	}
nexpaq	0:6c56fb4bc5f0	6471	#endif /* MBEDTLS_SSL_RENEGOTIATION */
nexpaq	0:6c56fb4bc5f0	6472
nexpaq	0:6c56fb4bc5f0	6473	/*
nexpaq	0:6c56fb4bc5f0	6474	* Receive application data decrypted from the SSL layer
nexpaq	0:6c56fb4bc5f0	6475	*/
nexpaq	0:6c56fb4bc5f0	6476	int mbedtls_ssl_read( mbedtls_ssl_context ssl, unsigned char buf, size_t len )
nexpaq	0:6c56fb4bc5f0	6477	{
nexpaq	0:6c56fb4bc5f0	6478	int ret, record_read = 0;
nexpaq	0:6c56fb4bc5f0	6479	size_t n;
nexpaq	0:6c56fb4bc5f0	6480
nexpaq	0:6c56fb4bc5f0	6481	if( ssl == NULL \|\| ssl->conf == NULL )
nexpaq	0:6c56fb4bc5f0	6482	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
nexpaq	0:6c56fb4bc5f0	6483
nexpaq	0:6c56fb4bc5f0	6484	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> read" ) );
nexpaq	0:6c56fb4bc5f0	6485
nexpaq	0:6c56fb4bc5f0	6486	#if defined(MBEDTLS_SSL_PROTO_DTLS)
nexpaq	0:6c56fb4bc5f0	6487	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
nexpaq	0:6c56fb4bc5f0	6488	{
nexpaq	0:6c56fb4bc5f0	6489	if( ( ret = mbedtls_ssl_flush_output( ssl ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	6490	return( ret );
nexpaq	0:6c56fb4bc5f0	6491
nexpaq	0:6c56fb4bc5f0	6492	if( ssl->handshake != NULL &&
nexpaq	0:6c56fb4bc5f0	6493	ssl->handshake->retransmit_state == MBEDTLS_SSL_RETRANS_SENDING )
nexpaq	0:6c56fb4bc5f0	6494	{
nexpaq	0:6c56fb4bc5f0	6495	if( ( ret = mbedtls_ssl_resend( ssl ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	6496	return( ret );
nexpaq	0:6c56fb4bc5f0	6497	}
nexpaq	0:6c56fb4bc5f0	6498	}
nexpaq	0:6c56fb4bc5f0	6499	#endif
nexpaq	0:6c56fb4bc5f0	6500
nexpaq	0:6c56fb4bc5f0	6501	#if defined(MBEDTLS_SSL_RENEGOTIATION)
nexpaq	0:6c56fb4bc5f0	6502	if( ( ret = ssl_check_ctr_renegotiate( ssl ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	6503	{
nexpaq	0:6c56fb4bc5f0	6504	MBEDTLS_SSL_DEBUG_RET( 1, "ssl_check_ctr_renegotiate", ret );
nexpaq	0:6c56fb4bc5f0	6505	return( ret );
nexpaq	0:6c56fb4bc5f0	6506	}
nexpaq	0:6c56fb4bc5f0	6507	#endif
nexpaq	0:6c56fb4bc5f0	6508
nexpaq	0:6c56fb4bc5f0	6509	if( ssl->state != MBEDTLS_SSL_HANDSHAKE_OVER )
nexpaq	0:6c56fb4bc5f0	6510	{
nexpaq	0:6c56fb4bc5f0	6511	ret = mbedtls_ssl_handshake( ssl );
nexpaq	0:6c56fb4bc5f0	6512	if( ret == MBEDTLS_ERR_SSL_WAITING_SERVER_HELLO_RENEGO )
nexpaq	0:6c56fb4bc5f0	6513	{
nexpaq	0:6c56fb4bc5f0	6514	record_read = 1;
nexpaq	0:6c56fb4bc5f0	6515	}
nexpaq	0:6c56fb4bc5f0	6516	else if( ret != 0 )
nexpaq	0:6c56fb4bc5f0	6517	{
nexpaq	0:6c56fb4bc5f0	6518	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_handshake", ret );
nexpaq	0:6c56fb4bc5f0	6519	return( ret );
nexpaq	0:6c56fb4bc5f0	6520	}
nexpaq	0:6c56fb4bc5f0	6521	}
nexpaq	0:6c56fb4bc5f0	6522
nexpaq	0:6c56fb4bc5f0	6523	if( ssl->in_offt == NULL )
nexpaq	0:6c56fb4bc5f0	6524	{
nexpaq	0:6c56fb4bc5f0	6525	/* Start timer if not already running */
nexpaq	0:6c56fb4bc5f0	6526	if( ssl->f_get_timer != NULL &&
nexpaq	0:6c56fb4bc5f0	6527	ssl->f_get_timer( ssl->p_timer ) == -1 )
nexpaq	0:6c56fb4bc5f0	6528	{
nexpaq	0:6c56fb4bc5f0	6529	ssl_set_timer( ssl, ssl->conf->read_timeout );
nexpaq	0:6c56fb4bc5f0	6530	}
nexpaq	0:6c56fb4bc5f0	6531
nexpaq	0:6c56fb4bc5f0	6532	if( ! record_read )
nexpaq	0:6c56fb4bc5f0	6533	{
nexpaq	0:6c56fb4bc5f0	6534	if( ( ret = mbedtls_ssl_read_record( ssl ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	6535	{
nexpaq	0:6c56fb4bc5f0	6536	if( ret == MBEDTLS_ERR_SSL_CONN_EOF )
nexpaq	0:6c56fb4bc5f0	6537	return( 0 );
nexpaq	0:6c56fb4bc5f0	6538
nexpaq	0:6c56fb4bc5f0	6539	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_read_record", ret );
nexpaq	0:6c56fb4bc5f0	6540	return( ret );
nexpaq	0:6c56fb4bc5f0	6541	}
nexpaq	0:6c56fb4bc5f0	6542	}
nexpaq	0:6c56fb4bc5f0	6543
nexpaq	0:6c56fb4bc5f0	6544	if( ssl->in_msglen == 0 &&
nexpaq	0:6c56fb4bc5f0	6545	ssl->in_msgtype == MBEDTLS_SSL_MSG_APPLICATION_DATA )
nexpaq	0:6c56fb4bc5f0	6546	{
nexpaq	0:6c56fb4bc5f0	6547	/*
nexpaq	0:6c56fb4bc5f0	6548	* OpenSSL sends empty messages to randomize the IV
nexpaq	0:6c56fb4bc5f0	6549	*/
nexpaq	0:6c56fb4bc5f0	6550	if( ( ret = mbedtls_ssl_read_record( ssl ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	6551	{
nexpaq	0:6c56fb4bc5f0	6552	if( ret == MBEDTLS_ERR_SSL_CONN_EOF )
nexpaq	0:6c56fb4bc5f0	6553	return( 0 );
nexpaq	0:6c56fb4bc5f0	6554
nexpaq	0:6c56fb4bc5f0	6555	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_read_record", ret );
nexpaq	0:6c56fb4bc5f0	6556	return( ret );
nexpaq	0:6c56fb4bc5f0	6557	}
nexpaq	0:6c56fb4bc5f0	6558	}
nexpaq	0:6c56fb4bc5f0	6559
nexpaq	0:6c56fb4bc5f0	6560	#if defined(MBEDTLS_SSL_RENEGOTIATION)
nexpaq	0:6c56fb4bc5f0	6561	if( ssl->in_msgtype == MBEDTLS_SSL_MSG_HANDSHAKE )
nexpaq	0:6c56fb4bc5f0	6562	{
nexpaq	0:6c56fb4bc5f0	6563	MBEDTLS_SSL_DEBUG_MSG( 1, ( "received handshake message" ) );
nexpaq	0:6c56fb4bc5f0	6564
nexpaq	0:6c56fb4bc5f0	6565	#if defined(MBEDTLS_SSL_CLI_C)
nexpaq	0:6c56fb4bc5f0	6566	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_CLIENT &&
nexpaq	0:6c56fb4bc5f0	6567	( ssl->in_msg[0] != MBEDTLS_SSL_HS_HELLO_REQUEST \|\|
nexpaq	0:6c56fb4bc5f0	6568	ssl->in_hslen != mbedtls_ssl_hs_hdr_len( ssl ) ) )
nexpaq	0:6c56fb4bc5f0	6569	{
nexpaq	0:6c56fb4bc5f0	6570	MBEDTLS_SSL_DEBUG_MSG( 1, ( "handshake received (not HelloRequest)" ) );
nexpaq	0:6c56fb4bc5f0	6571
nexpaq	0:6c56fb4bc5f0	6572	/* With DTLS, drop the packet (probably from last handshake) */
nexpaq	0:6c56fb4bc5f0	6573	#if defined(MBEDTLS_SSL_PROTO_DTLS)
nexpaq	0:6c56fb4bc5f0	6574	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
nexpaq	0:6c56fb4bc5f0	6575	return( MBEDTLS_ERR_SSL_WANT_READ );
nexpaq	0:6c56fb4bc5f0	6576	#endif
nexpaq	0:6c56fb4bc5f0	6577	return( MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE );
nexpaq	0:6c56fb4bc5f0	6578	}
nexpaq	0:6c56fb4bc5f0	6579
nexpaq	0:6c56fb4bc5f0	6580	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER &&
nexpaq	0:6c56fb4bc5f0	6581	ssl->in_msg[0] != MBEDTLS_SSL_HS_CLIENT_HELLO )
nexpaq	0:6c56fb4bc5f0	6582	{
nexpaq	0:6c56fb4bc5f0	6583	MBEDTLS_SSL_DEBUG_MSG( 1, ( "handshake received (not ClientHello)" ) );
nexpaq	0:6c56fb4bc5f0	6584
nexpaq	0:6c56fb4bc5f0	6585	/* With DTLS, drop the packet (probably from last handshake) */
nexpaq	0:6c56fb4bc5f0	6586	#if defined(MBEDTLS_SSL_PROTO_DTLS)
nexpaq	0:6c56fb4bc5f0	6587	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
nexpaq	0:6c56fb4bc5f0	6588	return( MBEDTLS_ERR_SSL_WANT_READ );
nexpaq	0:6c56fb4bc5f0	6589	#endif
nexpaq	0:6c56fb4bc5f0	6590	return( MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE );
nexpaq	0:6c56fb4bc5f0	6591	}
nexpaq	0:6c56fb4bc5f0	6592	#endif
nexpaq	0:6c56fb4bc5f0	6593
nexpaq	0:6c56fb4bc5f0	6594	if( ssl->conf->disable_renegotiation == MBEDTLS_SSL_RENEGOTIATION_DISABLED \|\|
nexpaq	0:6c56fb4bc5f0	6595	( ssl->secure_renegotiation == MBEDTLS_SSL_LEGACY_RENEGOTIATION &&
nexpaq	0:6c56fb4bc5f0	6596	ssl->conf->allow_legacy_renegotiation ==
nexpaq	0:6c56fb4bc5f0	6597	MBEDTLS_SSL_LEGACY_NO_RENEGOTIATION ) )
nexpaq	0:6c56fb4bc5f0	6598	{
nexpaq	0:6c56fb4bc5f0	6599	MBEDTLS_SSL_DEBUG_MSG( 3, ( "refusing renegotiation, sending alert" ) );
nexpaq	0:6c56fb4bc5f0	6600
nexpaq	0:6c56fb4bc5f0	6601	#if defined(MBEDTLS_SSL_PROTO_SSL3)
nexpaq	0:6c56fb4bc5f0	6602	if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 )
nexpaq	0:6c56fb4bc5f0	6603	{
nexpaq	0:6c56fb4bc5f0	6604	/*
nexpaq	0:6c56fb4bc5f0	6605	* SSLv3 does not have a "no_renegotiation" alert
nexpaq	0:6c56fb4bc5f0	6606	*/
nexpaq	0:6c56fb4bc5f0	6607	if( ( ret = mbedtls_ssl_send_fatal_handshake_failure( ssl ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	6608	return( ret );
nexpaq	0:6c56fb4bc5f0	6609	}
nexpaq	0:6c56fb4bc5f0	6610	else
nexpaq	0:6c56fb4bc5f0	6611	#endif /* MBEDTLS_SSL_PROTO_SSL3 */
nexpaq	0:6c56fb4bc5f0	6612	#if defined(MBEDTLS_SSL_PROTO_TLS1) \|\| defined(MBEDTLS_SSL_PROTO_TLS1_1) \|\| \
nexpaq	0:6c56fb4bc5f0	6613	defined(MBEDTLS_SSL_PROTO_TLS1_2)
nexpaq	0:6c56fb4bc5f0	6614	if( ssl->minor_ver >= MBEDTLS_SSL_MINOR_VERSION_1 )
nexpaq	0:6c56fb4bc5f0	6615	{
nexpaq	0:6c56fb4bc5f0	6616	if( ( ret = mbedtls_ssl_send_alert_message( ssl,
nexpaq	0:6c56fb4bc5f0	6617	MBEDTLS_SSL_ALERT_LEVEL_WARNING,
nexpaq	0:6c56fb4bc5f0	6618	MBEDTLS_SSL_ALERT_MSG_NO_RENEGOTIATION ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	6619	{
nexpaq	0:6c56fb4bc5f0	6620	return( ret );
nexpaq	0:6c56fb4bc5f0	6621	}
nexpaq	0:6c56fb4bc5f0	6622	}
nexpaq	0:6c56fb4bc5f0	6623	else
nexpaq	0:6c56fb4bc5f0	6624	#endif /* MBEDTLS_SSL_PROTO_TLS1 \|\| MBEDTLS_SSL_PROTO_TLS1_1 \|\|
nexpaq	0:6c56fb4bc5f0	6625	MBEDTLS_SSL_PROTO_TLS1_2 */
nexpaq	0:6c56fb4bc5f0	6626	{
nexpaq	0:6c56fb4bc5f0	6627	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
nexpaq	0:6c56fb4bc5f0	6628	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
nexpaq	0:6c56fb4bc5f0	6629	}
nexpaq	0:6c56fb4bc5f0	6630	}
nexpaq	0:6c56fb4bc5f0	6631	else
nexpaq	0:6c56fb4bc5f0	6632	{
nexpaq	0:6c56fb4bc5f0	6633	/* DTLS clients need to know renego is server-initiated */
nexpaq	0:6c56fb4bc5f0	6634	#if defined(MBEDTLS_SSL_PROTO_DTLS)
nexpaq	0:6c56fb4bc5f0	6635	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM &&
nexpaq	0:6c56fb4bc5f0	6636	ssl->conf->endpoint == MBEDTLS_SSL_IS_CLIENT )
nexpaq	0:6c56fb4bc5f0	6637	{
nexpaq	0:6c56fb4bc5f0	6638	ssl->renego_status = MBEDTLS_SSL_RENEGOTIATION_PENDING;
nexpaq	0:6c56fb4bc5f0	6639	}
nexpaq	0:6c56fb4bc5f0	6640	#endif
nexpaq	0:6c56fb4bc5f0	6641	ret = ssl_start_renegotiation( ssl );
nexpaq	0:6c56fb4bc5f0	6642	if( ret == MBEDTLS_ERR_SSL_WAITING_SERVER_HELLO_RENEGO )
nexpaq	0:6c56fb4bc5f0	6643	{
nexpaq	0:6c56fb4bc5f0	6644	record_read = 1;
nexpaq	0:6c56fb4bc5f0	6645	}
nexpaq	0:6c56fb4bc5f0	6646	else if( ret != 0 )
nexpaq	0:6c56fb4bc5f0	6647	{
nexpaq	0:6c56fb4bc5f0	6648	MBEDTLS_SSL_DEBUG_RET( 1, "ssl_start_renegotiation", ret );
nexpaq	0:6c56fb4bc5f0	6649	return( ret );
nexpaq	0:6c56fb4bc5f0	6650	}
nexpaq	0:6c56fb4bc5f0	6651	}
nexpaq	0:6c56fb4bc5f0	6652
nexpaq	0:6c56fb4bc5f0	6653	/* If a non-handshake record was read during renego, fallthrough,
nexpaq	0:6c56fb4bc5f0	6654	* else tell the user they should call mbedtls_ssl_read() again */
nexpaq	0:6c56fb4bc5f0	6655	if( ! record_read )
nexpaq	0:6c56fb4bc5f0	6656	return( MBEDTLS_ERR_SSL_WANT_READ );
nexpaq	0:6c56fb4bc5f0	6657	}
nexpaq	0:6c56fb4bc5f0	6658	else if( ssl->renego_status == MBEDTLS_SSL_RENEGOTIATION_PENDING )
nexpaq	0:6c56fb4bc5f0	6659	{
nexpaq	0:6c56fb4bc5f0	6660
nexpaq	0:6c56fb4bc5f0	6661	if( ssl->conf->renego_max_records >= 0 )
nexpaq	0:6c56fb4bc5f0	6662	{
nexpaq	0:6c56fb4bc5f0	6663	if( ++ssl->renego_records_seen > ssl->conf->renego_max_records )
nexpaq	0:6c56fb4bc5f0	6664	{
nexpaq	0:6c56fb4bc5f0	6665	MBEDTLS_SSL_DEBUG_MSG( 1, ( "renegotiation requested, "
nexpaq	0:6c56fb4bc5f0	6666	"but not honored by client" ) );
nexpaq	0:6c56fb4bc5f0	6667	return( MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE );
nexpaq	0:6c56fb4bc5f0	6668	}
nexpaq	0:6c56fb4bc5f0	6669	}
nexpaq	0:6c56fb4bc5f0	6670	}
nexpaq	0:6c56fb4bc5f0	6671	#endif /* MBEDTLS_SSL_RENEGOTIATION */
nexpaq	0:6c56fb4bc5f0	6672
nexpaq	0:6c56fb4bc5f0	6673	/* Fatal and closure alerts handled by mbedtls_ssl_read_record() */
nexpaq	0:6c56fb4bc5f0	6674	if( ssl->in_msgtype == MBEDTLS_SSL_MSG_ALERT )
nexpaq	0:6c56fb4bc5f0	6675	{
nexpaq	0:6c56fb4bc5f0	6676	MBEDTLS_SSL_DEBUG_MSG( 2, ( "ignoring non-fatal non-closure alert" ) );
nexpaq	0:6c56fb4bc5f0	6677	return( MBEDTLS_ERR_SSL_WANT_READ );
nexpaq	0:6c56fb4bc5f0	6678	}
nexpaq	0:6c56fb4bc5f0	6679
nexpaq	0:6c56fb4bc5f0	6680	if( ssl->in_msgtype != MBEDTLS_SSL_MSG_APPLICATION_DATA )
nexpaq	0:6c56fb4bc5f0	6681	{
nexpaq	0:6c56fb4bc5f0	6682	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad application data message" ) );
nexpaq	0:6c56fb4bc5f0	6683	return( MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE );
nexpaq	0:6c56fb4bc5f0	6684	}
nexpaq	0:6c56fb4bc5f0	6685
nexpaq	0:6c56fb4bc5f0	6686	ssl->in_offt = ssl->in_msg;
nexpaq	0:6c56fb4bc5f0	6687
nexpaq	0:6c56fb4bc5f0	6688	/* We're going to return something now, cancel timer,
nexpaq	0:6c56fb4bc5f0	6689	* except if handshake (renegotiation) is in progress */
nexpaq	0:6c56fb4bc5f0	6690	if( ssl->state == MBEDTLS_SSL_HANDSHAKE_OVER )
nexpaq	0:6c56fb4bc5f0	6691	ssl_set_timer( ssl, 0 );
nexpaq	0:6c56fb4bc5f0	6692
nexpaq	0:6c56fb4bc5f0	6693	#if defined(MBEDTLS_SSL_PROTO_DTLS)
nexpaq	0:6c56fb4bc5f0	6694	/* If we requested renego but received AppData, resend HelloRequest.
nexpaq	0:6c56fb4bc5f0	6695	* Do it now, after setting in_offt, to avoid taking this branch
nexpaq	0:6c56fb4bc5f0	6696	* again if ssl_write_hello_request() returns WANT_WRITE */
nexpaq	0:6c56fb4bc5f0	6697	#if defined(MBEDTLS_SSL_SRV_C) && defined(MBEDTLS_SSL_RENEGOTIATION)
nexpaq	0:6c56fb4bc5f0	6698	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER &&
nexpaq	0:6c56fb4bc5f0	6699	ssl->renego_status == MBEDTLS_SSL_RENEGOTIATION_PENDING )
nexpaq	0:6c56fb4bc5f0	6700	{
nexpaq	0:6c56fb4bc5f0	6701	if( ( ret = ssl_resend_hello_request( ssl ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	6702	{
nexpaq	0:6c56fb4bc5f0	6703	MBEDTLS_SSL_DEBUG_RET( 1, "ssl_resend_hello_request", ret );
nexpaq	0:6c56fb4bc5f0	6704	return( ret );
nexpaq	0:6c56fb4bc5f0	6705	}
nexpaq	0:6c56fb4bc5f0	6706	}
nexpaq	0:6c56fb4bc5f0	6707	#endif /* MBEDTLS_SSL_SRV_C && MBEDTLS_SSL_RENEGOTIATION */
nexpaq	0:6c56fb4bc5f0	6708	#endif
nexpaq	0:6c56fb4bc5f0	6709	}
nexpaq	0:6c56fb4bc5f0	6710
nexpaq	0:6c56fb4bc5f0	6711	n = ( len < ssl->in_msglen )
nexpaq	0:6c56fb4bc5f0	6712	? len : ssl->in_msglen;
nexpaq	0:6c56fb4bc5f0	6713
nexpaq	0:6c56fb4bc5f0	6714	memcpy( buf, ssl->in_offt, n );
nexpaq	0:6c56fb4bc5f0	6715	ssl->in_msglen -= n;
nexpaq	0:6c56fb4bc5f0	6716
nexpaq	0:6c56fb4bc5f0	6717	if( ssl->in_msglen == 0 )
nexpaq	0:6c56fb4bc5f0	6718	/* all bytes consumed */
nexpaq	0:6c56fb4bc5f0	6719	ssl->in_offt = NULL;
nexpaq	0:6c56fb4bc5f0	6720	else
nexpaq	0:6c56fb4bc5f0	6721	/* more data available */
nexpaq	0:6c56fb4bc5f0	6722	ssl->in_offt += n;
nexpaq	0:6c56fb4bc5f0	6723
nexpaq	0:6c56fb4bc5f0	6724	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= read" ) );
nexpaq	0:6c56fb4bc5f0	6725
nexpaq	0:6c56fb4bc5f0	6726	return( (int) n );
nexpaq	0:6c56fb4bc5f0	6727	}
nexpaq	0:6c56fb4bc5f0	6728
nexpaq	0:6c56fb4bc5f0	6729	/*
nexpaq	0:6c56fb4bc5f0	6730	* Send application data to be encrypted by the SSL layer,
nexpaq	0:6c56fb4bc5f0	6731	* taking care of max fragment length and buffer size
nexpaq	0:6c56fb4bc5f0	6732	*/
nexpaq	0:6c56fb4bc5f0	6733	static int ssl_write_real( mbedtls_ssl_context *ssl,
nexpaq	0:6c56fb4bc5f0	6734	const unsigned char *buf, size_t len )
nexpaq	0:6c56fb4bc5f0	6735	{
nexpaq	0:6c56fb4bc5f0	6736	int ret;
nexpaq	0:6c56fb4bc5f0	6737	#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
nexpaq	0:6c56fb4bc5f0	6738	size_t max_len = mbedtls_ssl_get_max_frag_len( ssl );
nexpaq	0:6c56fb4bc5f0	6739
nexpaq	0:6c56fb4bc5f0	6740	if( len > max_len )
nexpaq	0:6c56fb4bc5f0	6741	{
nexpaq	0:6c56fb4bc5f0	6742	#if defined(MBEDTLS_SSL_PROTO_DTLS)
nexpaq	0:6c56fb4bc5f0	6743	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
nexpaq	0:6c56fb4bc5f0	6744	{
nexpaq	0:6c56fb4bc5f0	6745	MBEDTLS_SSL_DEBUG_MSG( 1, ( "fragment larger than the (negotiated) "
nexpaq	0:6c56fb4bc5f0	6746	"maximum fragment length: %d > %d",
nexpaq	0:6c56fb4bc5f0	6747	len, max_len ) );
nexpaq	0:6c56fb4bc5f0	6748	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
nexpaq	0:6c56fb4bc5f0	6749	}
nexpaq	0:6c56fb4bc5f0	6750	else
nexpaq	0:6c56fb4bc5f0	6751	#endif
nexpaq	0:6c56fb4bc5f0	6752	len = max_len;
nexpaq	0:6c56fb4bc5f0	6753	}
nexpaq	0:6c56fb4bc5f0	6754	#endif /* MBEDTLS_SSL_MAX_FRAGMENT_LENGTH */
nexpaq	0:6c56fb4bc5f0	6755
nexpaq	0:6c56fb4bc5f0	6756	if( ssl->out_left != 0 )
nexpaq	0:6c56fb4bc5f0	6757	{
nexpaq	0:6c56fb4bc5f0	6758	if( ( ret = mbedtls_ssl_flush_output( ssl ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	6759	{
nexpaq	0:6c56fb4bc5f0	6760	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_flush_output", ret );
nexpaq	0:6c56fb4bc5f0	6761	return( ret );
nexpaq	0:6c56fb4bc5f0	6762	}
nexpaq	0:6c56fb4bc5f0	6763	}
nexpaq	0:6c56fb4bc5f0	6764	else
nexpaq	0:6c56fb4bc5f0	6765	{
nexpaq	0:6c56fb4bc5f0	6766	ssl->out_msglen = len;
nexpaq	0:6c56fb4bc5f0	6767	ssl->out_msgtype = MBEDTLS_SSL_MSG_APPLICATION_DATA;
nexpaq	0:6c56fb4bc5f0	6768	memcpy( ssl->out_msg, buf, len );
nexpaq	0:6c56fb4bc5f0	6769
nexpaq	0:6c56fb4bc5f0	6770	if( ( ret = mbedtls_ssl_write_record( ssl ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	6771	{
nexpaq	0:6c56fb4bc5f0	6772	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_write_record", ret );
nexpaq	0:6c56fb4bc5f0	6773	return( ret );
nexpaq	0:6c56fb4bc5f0	6774	}
nexpaq	0:6c56fb4bc5f0	6775	}
nexpaq	0:6c56fb4bc5f0	6776
nexpaq	0:6c56fb4bc5f0	6777	return( (int) len );
nexpaq	0:6c56fb4bc5f0	6778	}
nexpaq	0:6c56fb4bc5f0	6779
nexpaq	0:6c56fb4bc5f0	6780	/*
nexpaq	0:6c56fb4bc5f0	6781	* Write application data, doing 1/n-1 splitting if necessary.
nexpaq	0:6c56fb4bc5f0	6782	*
nexpaq	0:6c56fb4bc5f0	6783	* With non-blocking I/O, ssl_write_real() may return WANT_WRITE,
nexpaq	0:6c56fb4bc5f0	6784	* then the caller will call us again with the same arguments, so
nexpaq	0:6c56fb4bc5f0	6785	* remember wether we already did the split or not.
nexpaq	0:6c56fb4bc5f0	6786	*/
nexpaq	0:6c56fb4bc5f0	6787	#if defined(MBEDTLS_SSL_CBC_RECORD_SPLITTING)
nexpaq	0:6c56fb4bc5f0	6788	static int ssl_write_split( mbedtls_ssl_context *ssl,
nexpaq	0:6c56fb4bc5f0	6789	const unsigned char *buf, size_t len )
nexpaq	0:6c56fb4bc5f0	6790	{
nexpaq	0:6c56fb4bc5f0	6791	int ret;
nexpaq	0:6c56fb4bc5f0	6792
nexpaq	0:6c56fb4bc5f0	6793	if( ssl->conf->cbc_record_splitting ==
nexpaq	0:6c56fb4bc5f0	6794	MBEDTLS_SSL_CBC_RECORD_SPLITTING_DISABLED \|\|
nexpaq	0:6c56fb4bc5f0	6795	len <= 1 \|\|
nexpaq	0:6c56fb4bc5f0	6796	ssl->minor_ver > MBEDTLS_SSL_MINOR_VERSION_1 \|\|
nexpaq	0:6c56fb4bc5f0	6797	mbedtls_cipher_get_cipher_mode( &ssl->transform_out->cipher_ctx_enc )
nexpaq	0:6c56fb4bc5f0	6798	!= MBEDTLS_MODE_CBC )
nexpaq	0:6c56fb4bc5f0	6799	{
nexpaq	0:6c56fb4bc5f0	6800	return( ssl_write_real( ssl, buf, len ) );
nexpaq	0:6c56fb4bc5f0	6801	}
nexpaq	0:6c56fb4bc5f0	6802
nexpaq	0:6c56fb4bc5f0	6803	if( ssl->split_done == 0 )
nexpaq	0:6c56fb4bc5f0	6804	{
nexpaq	0:6c56fb4bc5f0	6805	if( ( ret = ssl_write_real( ssl, buf, 1 ) ) <= 0 )
nexpaq	0:6c56fb4bc5f0	6806	return( ret );
nexpaq	0:6c56fb4bc5f0	6807	ssl->split_done = 1;
nexpaq	0:6c56fb4bc5f0	6808	}
nexpaq	0:6c56fb4bc5f0	6809
nexpaq	0:6c56fb4bc5f0	6810	if( ( ret = ssl_write_real( ssl, buf + 1, len - 1 ) ) <= 0 )
nexpaq	0:6c56fb4bc5f0	6811	return( ret );
nexpaq	0:6c56fb4bc5f0	6812	ssl->split_done = 0;
nexpaq	0:6c56fb4bc5f0	6813
nexpaq	0:6c56fb4bc5f0	6814	return( ret + 1 );
nexpaq	0:6c56fb4bc5f0	6815	}
nexpaq	0:6c56fb4bc5f0	6816	#endif /* MBEDTLS_SSL_CBC_RECORD_SPLITTING */
nexpaq	0:6c56fb4bc5f0	6817
nexpaq	0:6c56fb4bc5f0	6818	/*
nexpaq	0:6c56fb4bc5f0	6819	* Write application data (public-facing wrapper)
nexpaq	0:6c56fb4bc5f0	6820	*/
nexpaq	0:6c56fb4bc5f0	6821	int mbedtls_ssl_write( mbedtls_ssl_context ssl, const unsigned char buf, size_t len )
nexpaq	0:6c56fb4bc5f0	6822	{
nexpaq	0:6c56fb4bc5f0	6823	int ret;
nexpaq	0:6c56fb4bc5f0	6824
nexpaq	0:6c56fb4bc5f0	6825	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write" ) );
nexpaq	0:6c56fb4bc5f0	6826
nexpaq	0:6c56fb4bc5f0	6827	if( ssl == NULL \|\| ssl->conf == NULL )
nexpaq	0:6c56fb4bc5f0	6828	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
nexpaq	0:6c56fb4bc5f0	6829
nexpaq	0:6c56fb4bc5f0	6830	#if defined(MBEDTLS_SSL_RENEGOTIATION)
nexpaq	0:6c56fb4bc5f0	6831	if( ( ret = ssl_check_ctr_renegotiate( ssl ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	6832	{
nexpaq	0:6c56fb4bc5f0	6833	MBEDTLS_SSL_DEBUG_RET( 1, "ssl_check_ctr_renegotiate", ret );
nexpaq	0:6c56fb4bc5f0	6834	return( ret );
nexpaq	0:6c56fb4bc5f0	6835	}
nexpaq	0:6c56fb4bc5f0	6836	#endif
nexpaq	0:6c56fb4bc5f0	6837
nexpaq	0:6c56fb4bc5f0	6838	if( ssl->state != MBEDTLS_SSL_HANDSHAKE_OVER )
nexpaq	0:6c56fb4bc5f0	6839	{
nexpaq	0:6c56fb4bc5f0	6840	if( ( ret = mbedtls_ssl_handshake( ssl ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	6841	{
nexpaq	0:6c56fb4bc5f0	6842	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_handshake", ret );
nexpaq	0:6c56fb4bc5f0	6843	return( ret );
nexpaq	0:6c56fb4bc5f0	6844	}
nexpaq	0:6c56fb4bc5f0	6845	}
nexpaq	0:6c56fb4bc5f0	6846
nexpaq	0:6c56fb4bc5f0	6847	#if defined(MBEDTLS_SSL_CBC_RECORD_SPLITTING)
nexpaq	0:6c56fb4bc5f0	6848	ret = ssl_write_split( ssl, buf, len );
nexpaq	0:6c56fb4bc5f0	6849	#else
nexpaq	0:6c56fb4bc5f0	6850	ret = ssl_write_real( ssl, buf, len );
nexpaq	0:6c56fb4bc5f0	6851	#endif
nexpaq	0:6c56fb4bc5f0	6852
nexpaq	0:6c56fb4bc5f0	6853	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= write" ) );
nexpaq	0:6c56fb4bc5f0	6854
nexpaq	0:6c56fb4bc5f0	6855	return( ret );
nexpaq	0:6c56fb4bc5f0	6856	}
nexpaq	0:6c56fb4bc5f0	6857
nexpaq	0:6c56fb4bc5f0	6858	/*
nexpaq	0:6c56fb4bc5f0	6859	* Notify the peer that the connection is being closed
nexpaq	0:6c56fb4bc5f0	6860	*/
nexpaq	0:6c56fb4bc5f0	6861	int mbedtls_ssl_close_notify( mbedtls_ssl_context *ssl )
nexpaq	0:6c56fb4bc5f0	6862	{
nexpaq	0:6c56fb4bc5f0	6863	int ret;
nexpaq	0:6c56fb4bc5f0	6864
nexpaq	0:6c56fb4bc5f0	6865	if( ssl == NULL \|\| ssl->conf == NULL )
nexpaq	0:6c56fb4bc5f0	6866	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
nexpaq	0:6c56fb4bc5f0	6867
nexpaq	0:6c56fb4bc5f0	6868	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write close notify" ) );
nexpaq	0:6c56fb4bc5f0	6869
nexpaq	0:6c56fb4bc5f0	6870	if( ssl->out_left != 0 )
nexpaq	0:6c56fb4bc5f0	6871	return( mbedtls_ssl_flush_output( ssl ) );
nexpaq	0:6c56fb4bc5f0	6872
nexpaq	0:6c56fb4bc5f0	6873	if( ssl->state == MBEDTLS_SSL_HANDSHAKE_OVER )
nexpaq	0:6c56fb4bc5f0	6874	{
nexpaq	0:6c56fb4bc5f0	6875	if( ( ret = mbedtls_ssl_send_alert_message( ssl,
nexpaq	0:6c56fb4bc5f0	6876	MBEDTLS_SSL_ALERT_LEVEL_WARNING,
nexpaq	0:6c56fb4bc5f0	6877	MBEDTLS_SSL_ALERT_MSG_CLOSE_NOTIFY ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	6878	{
nexpaq	0:6c56fb4bc5f0	6879	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_send_alert_message", ret );
nexpaq	0:6c56fb4bc5f0	6880	return( ret );
nexpaq	0:6c56fb4bc5f0	6881	}
nexpaq	0:6c56fb4bc5f0	6882	}
nexpaq	0:6c56fb4bc5f0	6883
nexpaq	0:6c56fb4bc5f0	6884	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= write close notify" ) );
nexpaq	0:6c56fb4bc5f0	6885
nexpaq	0:6c56fb4bc5f0	6886	return( 0 );
nexpaq	0:6c56fb4bc5f0	6887	}
nexpaq	0:6c56fb4bc5f0	6888
nexpaq	0:6c56fb4bc5f0	6889	void mbedtls_ssl_transform_free( mbedtls_ssl_transform *transform )
nexpaq	0:6c56fb4bc5f0	6890	{
nexpaq	0:6c56fb4bc5f0	6891	if( transform == NULL )
nexpaq	0:6c56fb4bc5f0	6892	return;
nexpaq	0:6c56fb4bc5f0	6893
nexpaq	0:6c56fb4bc5f0	6894	#if defined(MBEDTLS_ZLIB_SUPPORT)
nexpaq	0:6c56fb4bc5f0	6895	deflateEnd( &transform->ctx_deflate );
nexpaq	0:6c56fb4bc5f0	6896	inflateEnd( &transform->ctx_inflate );
nexpaq	0:6c56fb4bc5f0	6897	#endif
nexpaq	0:6c56fb4bc5f0	6898
nexpaq	0:6c56fb4bc5f0	6899	mbedtls_cipher_free( &transform->cipher_ctx_enc );
nexpaq	0:6c56fb4bc5f0	6900	mbedtls_cipher_free( &transform->cipher_ctx_dec );
nexpaq	0:6c56fb4bc5f0	6901
nexpaq	0:6c56fb4bc5f0	6902	mbedtls_md_free( &transform->md_ctx_enc );
nexpaq	0:6c56fb4bc5f0	6903	mbedtls_md_free( &transform->md_ctx_dec );
nexpaq	0:6c56fb4bc5f0	6904
nexpaq	0:6c56fb4bc5f0	6905	mbedtls_zeroize( transform, sizeof( mbedtls_ssl_transform ) );
nexpaq	0:6c56fb4bc5f0	6906	}
nexpaq	0:6c56fb4bc5f0	6907
nexpaq	0:6c56fb4bc5f0	6908	#if defined(MBEDTLS_X509_CRT_PARSE_C)
nexpaq	0:6c56fb4bc5f0	6909	static void ssl_key_cert_free( mbedtls_ssl_key_cert *key_cert )
nexpaq	0:6c56fb4bc5f0	6910	{
nexpaq	0:6c56fb4bc5f0	6911	mbedtls_ssl_key_cert cur = key_cert, next;
nexpaq	0:6c56fb4bc5f0	6912
nexpaq	0:6c56fb4bc5f0	6913	while( cur != NULL )
nexpaq	0:6c56fb4bc5f0	6914	{
nexpaq	0:6c56fb4bc5f0	6915	next = cur->next;
nexpaq	0:6c56fb4bc5f0	6916	mbedtls_free( cur );
nexpaq	0:6c56fb4bc5f0	6917	cur = next;
nexpaq	0:6c56fb4bc5f0	6918	}
nexpaq	0:6c56fb4bc5f0	6919	}
nexpaq	0:6c56fb4bc5f0	6920	#endif /* MBEDTLS_X509_CRT_PARSE_C */
nexpaq	0:6c56fb4bc5f0	6921
nexpaq	0:6c56fb4bc5f0	6922	void mbedtls_ssl_handshake_free( mbedtls_ssl_handshake_params *handshake )
nexpaq	0:6c56fb4bc5f0	6923	{
nexpaq	0:6c56fb4bc5f0	6924	if( handshake == NULL )
nexpaq	0:6c56fb4bc5f0	6925	return;
nexpaq	0:6c56fb4bc5f0	6926
nexpaq	0:6c56fb4bc5f0	6927	#if defined(MBEDTLS_SSL_PROTO_SSL3) \|\| defined(MBEDTLS_SSL_PROTO_TLS1) \|\| \
nexpaq	0:6c56fb4bc5f0	6928	defined(MBEDTLS_SSL_PROTO_TLS1_1)
nexpaq	0:6c56fb4bc5f0	6929	mbedtls_md5_free( &handshake->fin_md5 );
nexpaq	0:6c56fb4bc5f0	6930	mbedtls_sha1_free( &handshake->fin_sha1 );
nexpaq	0:6c56fb4bc5f0	6931	#endif
nexpaq	0:6c56fb4bc5f0	6932	#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
nexpaq	0:6c56fb4bc5f0	6933	#if defined(MBEDTLS_SHA256_C)
nexpaq	0:6c56fb4bc5f0	6934	mbedtls_sha256_free( &handshake->fin_sha256 );
nexpaq	0:6c56fb4bc5f0	6935	#endif
nexpaq	0:6c56fb4bc5f0	6936	#if defined(MBEDTLS_SHA512_C)
nexpaq	0:6c56fb4bc5f0	6937	mbedtls_sha512_free( &handshake->fin_sha512 );
nexpaq	0:6c56fb4bc5f0	6938	#endif
nexpaq	0:6c56fb4bc5f0	6939	#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
nexpaq	0:6c56fb4bc5f0	6940
nexpaq	0:6c56fb4bc5f0	6941	#if defined(MBEDTLS_DHM_C)
nexpaq	0:6c56fb4bc5f0	6942	mbedtls_dhm_free( &handshake->dhm_ctx );
nexpaq	0:6c56fb4bc5f0	6943	#endif
nexpaq	0:6c56fb4bc5f0	6944	#if defined(MBEDTLS_ECDH_C)
nexpaq	0:6c56fb4bc5f0	6945	mbedtls_ecdh_free( &handshake->ecdh_ctx );
nexpaq	0:6c56fb4bc5f0	6946	#endif
nexpaq	0:6c56fb4bc5f0	6947	#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
nexpaq	0:6c56fb4bc5f0	6948	mbedtls_ecjpake_free( &handshake->ecjpake_ctx );
nexpaq	0:6c56fb4bc5f0	6949	#if defined(MBEDTLS_SSL_CLI_C)
nexpaq	0:6c56fb4bc5f0	6950	mbedtls_free( handshake->ecjpake_cache );
nexpaq	0:6c56fb4bc5f0	6951	handshake->ecjpake_cache = NULL;
nexpaq	0:6c56fb4bc5f0	6952	handshake->ecjpake_cache_len = 0;
nexpaq	0:6c56fb4bc5f0	6953	#endif
nexpaq	0:6c56fb4bc5f0	6954	#endif
nexpaq	0:6c56fb4bc5f0	6955
nexpaq	0:6c56fb4bc5f0	6956	#if defined(MBEDTLS_ECDH_C) \|\| defined(MBEDTLS_ECDSA_C) \|\| \
nexpaq	0:6c56fb4bc5f0	6957	defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
nexpaq	0:6c56fb4bc5f0	6958	/* explicit void pointer cast for buggy MS compiler */
nexpaq	0:6c56fb4bc5f0	6959	mbedtls_free( (void *) handshake->curves );
nexpaq	0:6c56fb4bc5f0	6960	#endif
nexpaq	0:6c56fb4bc5f0	6961
nexpaq	0:6c56fb4bc5f0	6962	#if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
nexpaq	0:6c56fb4bc5f0	6963	if( handshake->psk != NULL )
nexpaq	0:6c56fb4bc5f0	6964	{
nexpaq	0:6c56fb4bc5f0	6965	mbedtls_zeroize( handshake->psk, handshake->psk_len );
nexpaq	0:6c56fb4bc5f0	6966	mbedtls_free( handshake->psk );
nexpaq	0:6c56fb4bc5f0	6967	}
nexpaq	0:6c56fb4bc5f0	6968	#endif
nexpaq	0:6c56fb4bc5f0	6969
nexpaq	0:6c56fb4bc5f0	6970	#if defined(MBEDTLS_X509_CRT_PARSE_C) && \
nexpaq	0:6c56fb4bc5f0	6971	defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
nexpaq	0:6c56fb4bc5f0	6972	/*
nexpaq	0:6c56fb4bc5f0	6973	* Free only the linked list wrapper, not the keys themselves
nexpaq	0:6c56fb4bc5f0	6974	* since the belong to the SNI callback
nexpaq	0:6c56fb4bc5f0	6975	*/
nexpaq	0:6c56fb4bc5f0	6976	if( handshake->sni_key_cert != NULL )
nexpaq	0:6c56fb4bc5f0	6977	{
nexpaq	0:6c56fb4bc5f0	6978	mbedtls_ssl_key_cert cur = handshake->sni_key_cert, next;
nexpaq	0:6c56fb4bc5f0	6979
nexpaq	0:6c56fb4bc5f0	6980	while( cur != NULL )
nexpaq	0:6c56fb4bc5f0	6981	{
nexpaq	0:6c56fb4bc5f0	6982	next = cur->next;
nexpaq	0:6c56fb4bc5f0	6983	mbedtls_free( cur );
nexpaq	0:6c56fb4bc5f0	6984	cur = next;
nexpaq	0:6c56fb4bc5f0	6985	}
nexpaq	0:6c56fb4bc5f0	6986	}
nexpaq	0:6c56fb4bc5f0	6987	#endif /* MBEDTLS_X509_CRT_PARSE_C && MBEDTLS_SSL_SERVER_NAME_INDICATION */
nexpaq	0:6c56fb4bc5f0	6988
nexpaq	0:6c56fb4bc5f0	6989	#if defined(MBEDTLS_SSL_PROTO_DTLS)
nexpaq	0:6c56fb4bc5f0	6990	mbedtls_free( handshake->verify_cookie );
nexpaq	0:6c56fb4bc5f0	6991	mbedtls_free( handshake->hs_msg );
nexpaq	0:6c56fb4bc5f0	6992	ssl_flight_free( handshake->flight );
nexpaq	0:6c56fb4bc5f0	6993	#endif
nexpaq	0:6c56fb4bc5f0	6994
nexpaq	0:6c56fb4bc5f0	6995	mbedtls_zeroize( handshake, sizeof( mbedtls_ssl_handshake_params ) );
nexpaq	0:6c56fb4bc5f0	6996	}
nexpaq	0:6c56fb4bc5f0	6997
nexpaq	0:6c56fb4bc5f0	6998	void mbedtls_ssl_session_free( mbedtls_ssl_session *session )
nexpaq	0:6c56fb4bc5f0	6999	{
nexpaq	0:6c56fb4bc5f0	7000	if( session == NULL )
nexpaq	0:6c56fb4bc5f0	7001	return;
nexpaq	0:6c56fb4bc5f0	7002
nexpaq	0:6c56fb4bc5f0	7003	#if defined(MBEDTLS_X509_CRT_PARSE_C)
nexpaq	0:6c56fb4bc5f0	7004	if( session->peer_cert != NULL )
nexpaq	0:6c56fb4bc5f0	7005	{
nexpaq	0:6c56fb4bc5f0	7006	mbedtls_x509_crt_free( session->peer_cert );
nexpaq	0:6c56fb4bc5f0	7007	mbedtls_free( session->peer_cert );
nexpaq	0:6c56fb4bc5f0	7008	}
nexpaq	0:6c56fb4bc5f0	7009	#endif
nexpaq	0:6c56fb4bc5f0	7010
nexpaq	0:6c56fb4bc5f0	7011	#if defined(MBEDTLS_SSL_SESSION_TICKETS) && defined(MBEDTLS_SSL_CLI_C)
nexpaq	0:6c56fb4bc5f0	7012	mbedtls_free( session->ticket );
nexpaq	0:6c56fb4bc5f0	7013	#endif
nexpaq	0:6c56fb4bc5f0	7014
nexpaq	0:6c56fb4bc5f0	7015	mbedtls_zeroize( session, sizeof( mbedtls_ssl_session ) );
nexpaq	0:6c56fb4bc5f0	7016	}
nexpaq	0:6c56fb4bc5f0	7017
nexpaq	0:6c56fb4bc5f0	7018	/*
nexpaq	0:6c56fb4bc5f0	7019	* Free an SSL context
nexpaq	0:6c56fb4bc5f0	7020	*/
nexpaq	0:6c56fb4bc5f0	7021	void mbedtls_ssl_free( mbedtls_ssl_context *ssl )
nexpaq	0:6c56fb4bc5f0	7022	{
nexpaq	0:6c56fb4bc5f0	7023	if( ssl == NULL )
nexpaq	0:6c56fb4bc5f0	7024	return;
nexpaq	0:6c56fb4bc5f0	7025
nexpaq	0:6c56fb4bc5f0	7026	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> free" ) );
nexpaq	0:6c56fb4bc5f0	7027
nexpaq	0:6c56fb4bc5f0	7028	if( ssl->out_buf != NULL )
nexpaq	0:6c56fb4bc5f0	7029	{
nexpaq	0:6c56fb4bc5f0	7030	mbedtls_zeroize( ssl->out_buf, MBEDTLS_SSL_BUFFER_LEN );
nexpaq	0:6c56fb4bc5f0	7031	mbedtls_free( ssl->out_buf );
nexpaq	0:6c56fb4bc5f0	7032	}
nexpaq	0:6c56fb4bc5f0	7033
nexpaq	0:6c56fb4bc5f0	7034	if( ssl->in_buf != NULL )
nexpaq	0:6c56fb4bc5f0	7035	{
nexpaq	0:6c56fb4bc5f0	7036	mbedtls_zeroize( ssl->in_buf, MBEDTLS_SSL_BUFFER_LEN );
nexpaq	0:6c56fb4bc5f0	7037	mbedtls_free( ssl->in_buf );
nexpaq	0:6c56fb4bc5f0	7038	}
nexpaq	0:6c56fb4bc5f0	7039
nexpaq	0:6c56fb4bc5f0	7040	#if defined(MBEDTLS_ZLIB_SUPPORT)
nexpaq	0:6c56fb4bc5f0	7041	if( ssl->compress_buf != NULL )
nexpaq	0:6c56fb4bc5f0	7042	{
nexpaq	0:6c56fb4bc5f0	7043	mbedtls_zeroize( ssl->compress_buf, MBEDTLS_SSL_BUFFER_LEN );
nexpaq	0:6c56fb4bc5f0	7044	mbedtls_free( ssl->compress_buf );
nexpaq	0:6c56fb4bc5f0	7045	}
nexpaq	0:6c56fb4bc5f0	7046	#endif
nexpaq	0:6c56fb4bc5f0	7047
nexpaq	0:6c56fb4bc5f0	7048	if( ssl->transform )
nexpaq	0:6c56fb4bc5f0	7049	{
nexpaq	0:6c56fb4bc5f0	7050	mbedtls_ssl_transform_free( ssl->transform );
nexpaq	0:6c56fb4bc5f0	7051	mbedtls_free( ssl->transform );
nexpaq	0:6c56fb4bc5f0	7052	}
nexpaq	0:6c56fb4bc5f0	7053
nexpaq	0:6c56fb4bc5f0	7054	if( ssl->handshake )
nexpaq	0:6c56fb4bc5f0	7055	{
nexpaq	0:6c56fb4bc5f0	7056	mbedtls_ssl_handshake_free( ssl->handshake );
nexpaq	0:6c56fb4bc5f0	7057	mbedtls_ssl_transform_free( ssl->transform_negotiate );
nexpaq	0:6c56fb4bc5f0	7058	mbedtls_ssl_session_free( ssl->session_negotiate );
nexpaq	0:6c56fb4bc5f0	7059
nexpaq	0:6c56fb4bc5f0	7060	mbedtls_free( ssl->handshake );
nexpaq	0:6c56fb4bc5f0	7061	mbedtls_free( ssl->transform_negotiate );
nexpaq	0:6c56fb4bc5f0	7062	mbedtls_free( ssl->session_negotiate );
nexpaq	0:6c56fb4bc5f0	7063	}
nexpaq	0:6c56fb4bc5f0	7064
nexpaq	0:6c56fb4bc5f0	7065	if( ssl->session )
nexpaq	0:6c56fb4bc5f0	7066	{
nexpaq	0:6c56fb4bc5f0	7067	mbedtls_ssl_session_free( ssl->session );
nexpaq	0:6c56fb4bc5f0	7068	mbedtls_free( ssl->session );
nexpaq	0:6c56fb4bc5f0	7069	}
nexpaq	0:6c56fb4bc5f0	7070
nexpaq	0:6c56fb4bc5f0	7071	#if defined(MBEDTLS_X509_CRT_PARSE_C)
nexpaq	0:6c56fb4bc5f0	7072	if( ssl->hostname != NULL )
nexpaq	0:6c56fb4bc5f0	7073	{
nexpaq	0:6c56fb4bc5f0	7074	mbedtls_zeroize( ssl->hostname, strlen( ssl->hostname ) );
nexpaq	0:6c56fb4bc5f0	7075	mbedtls_free( ssl->hostname );
nexpaq	0:6c56fb4bc5f0	7076	}
nexpaq	0:6c56fb4bc5f0	7077	#endif
nexpaq	0:6c56fb4bc5f0	7078
nexpaq	0:6c56fb4bc5f0	7079	#if defined(MBEDTLS_SSL_HW_RECORD_ACCEL)
nexpaq	0:6c56fb4bc5f0	7080	if( mbedtls_ssl_hw_record_finish != NULL )
nexpaq	0:6c56fb4bc5f0	7081	{
nexpaq	0:6c56fb4bc5f0	7082	MBEDTLS_SSL_DEBUG_MSG( 2, ( "going for mbedtls_ssl_hw_record_finish()" ) );
nexpaq	0:6c56fb4bc5f0	7083	mbedtls_ssl_hw_record_finish( ssl );
nexpaq	0:6c56fb4bc5f0	7084	}
nexpaq	0:6c56fb4bc5f0	7085	#endif
nexpaq	0:6c56fb4bc5f0	7086
nexpaq	0:6c56fb4bc5f0	7087	#if defined(MBEDTLS_SSL_DTLS_HELLO_VERIFY) && defined(MBEDTLS_SSL_SRV_C)
nexpaq	0:6c56fb4bc5f0	7088	mbedtls_free( ssl->cli_id );
nexpaq	0:6c56fb4bc5f0	7089	#endif
nexpaq	0:6c56fb4bc5f0	7090
nexpaq	0:6c56fb4bc5f0	7091	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= free" ) );
nexpaq	0:6c56fb4bc5f0	7092
nexpaq	0:6c56fb4bc5f0	7093	/* Actually clear after last debug message */
nexpaq	0:6c56fb4bc5f0	7094	mbedtls_zeroize( ssl, sizeof( mbedtls_ssl_context ) );
nexpaq	0:6c56fb4bc5f0	7095	}
nexpaq	0:6c56fb4bc5f0	7096
nexpaq	0:6c56fb4bc5f0	7097	/*
nexpaq	0:6c56fb4bc5f0	7098	* Initialze mbedtls_ssl_config
nexpaq	0:6c56fb4bc5f0	7099	*/
nexpaq	0:6c56fb4bc5f0	7100	void mbedtls_ssl_config_init( mbedtls_ssl_config *conf )
nexpaq	0:6c56fb4bc5f0	7101	{
nexpaq	0:6c56fb4bc5f0	7102	memset( conf, 0, sizeof( mbedtls_ssl_config ) );
nexpaq	0:6c56fb4bc5f0	7103	}
nexpaq	0:6c56fb4bc5f0	7104
nexpaq	0:6c56fb4bc5f0	7105	#if defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
nexpaq	0:6c56fb4bc5f0	7106	static int ssl_preset_default_hashes[] = {
nexpaq	0:6c56fb4bc5f0	7107	#if defined(MBEDTLS_SHA512_C)
nexpaq	0:6c56fb4bc5f0	7108	MBEDTLS_MD_SHA512,
nexpaq	0:6c56fb4bc5f0	7109	MBEDTLS_MD_SHA384,
nexpaq	0:6c56fb4bc5f0	7110	#endif
nexpaq	0:6c56fb4bc5f0	7111	#if defined(MBEDTLS_SHA256_C)
nexpaq	0:6c56fb4bc5f0	7112	MBEDTLS_MD_SHA256,
nexpaq	0:6c56fb4bc5f0	7113	MBEDTLS_MD_SHA224,
nexpaq	0:6c56fb4bc5f0	7114	#endif
nexpaq	0:6c56fb4bc5f0	7115	#if defined(MBEDTLS_SHA1_C)
nexpaq	0:6c56fb4bc5f0	7116	MBEDTLS_MD_SHA1,
nexpaq	0:6c56fb4bc5f0	7117	#endif
nexpaq	0:6c56fb4bc5f0	7118	MBEDTLS_MD_NONE
nexpaq	0:6c56fb4bc5f0	7119	};
nexpaq	0:6c56fb4bc5f0	7120	#endif
nexpaq	0:6c56fb4bc5f0	7121
nexpaq	0:6c56fb4bc5f0	7122	static int ssl_preset_suiteb_ciphersuites[] = {
nexpaq	0:6c56fb4bc5f0	7123	MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
nexpaq	0:6c56fb4bc5f0	7124	MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
nexpaq	0:6c56fb4bc5f0	7125	0
nexpaq	0:6c56fb4bc5f0	7126	};
nexpaq	0:6c56fb4bc5f0	7127
nexpaq	0:6c56fb4bc5f0	7128	#if defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
nexpaq	0:6c56fb4bc5f0	7129	static int ssl_preset_suiteb_hashes[] = {
nexpaq	0:6c56fb4bc5f0	7130	MBEDTLS_MD_SHA256,
nexpaq	0:6c56fb4bc5f0	7131	MBEDTLS_MD_SHA384,
nexpaq	0:6c56fb4bc5f0	7132	MBEDTLS_MD_NONE
nexpaq	0:6c56fb4bc5f0	7133	};
nexpaq	0:6c56fb4bc5f0	7134	#endif
nexpaq	0:6c56fb4bc5f0	7135
nexpaq	0:6c56fb4bc5f0	7136	#if defined(MBEDTLS_ECP_C)
nexpaq	0:6c56fb4bc5f0	7137	static mbedtls_ecp_group_id ssl_preset_suiteb_curves[] = {
nexpaq	0:6c56fb4bc5f0	7138	MBEDTLS_ECP_DP_SECP256R1,
nexpaq	0:6c56fb4bc5f0	7139	MBEDTLS_ECP_DP_SECP384R1,
nexpaq	0:6c56fb4bc5f0	7140	MBEDTLS_ECP_DP_NONE
nexpaq	0:6c56fb4bc5f0	7141	};
nexpaq	0:6c56fb4bc5f0	7142	#endif
nexpaq	0:6c56fb4bc5f0	7143
nexpaq	0:6c56fb4bc5f0	7144	/*
nexpaq	0:6c56fb4bc5f0	7145	* Load default in mbedtls_ssl_config
nexpaq	0:6c56fb4bc5f0	7146	*/
nexpaq	0:6c56fb4bc5f0	7147	int mbedtls_ssl_config_defaults( mbedtls_ssl_config *conf,
nexpaq	0:6c56fb4bc5f0	7148	int endpoint, int transport, int preset )
nexpaq	0:6c56fb4bc5f0	7149	{
nexpaq	0:6c56fb4bc5f0	7150	#if defined(MBEDTLS_DHM_C) && defined(MBEDTLS_SSL_SRV_C)
nexpaq	0:6c56fb4bc5f0	7151	int ret;
nexpaq	0:6c56fb4bc5f0	7152	#endif
nexpaq	0:6c56fb4bc5f0	7153
nexpaq	0:6c56fb4bc5f0	7154	/* Use the functions here so that they are covered in tests,
nexpaq	0:6c56fb4bc5f0	7155	* but otherwise access member directly for efficiency */
nexpaq	0:6c56fb4bc5f0	7156	mbedtls_ssl_conf_endpoint( conf, endpoint );
nexpaq	0:6c56fb4bc5f0	7157	mbedtls_ssl_conf_transport( conf, transport );
nexpaq	0:6c56fb4bc5f0	7158
nexpaq	0:6c56fb4bc5f0	7159	/*
nexpaq	0:6c56fb4bc5f0	7160	* Things that are common to all presets
nexpaq	0:6c56fb4bc5f0	7161	*/
nexpaq	0:6c56fb4bc5f0	7162	#if defined(MBEDTLS_SSL_CLI_C)
nexpaq	0:6c56fb4bc5f0	7163	if( endpoint == MBEDTLS_SSL_IS_CLIENT )
nexpaq	0:6c56fb4bc5f0	7164	{
nexpaq	0:6c56fb4bc5f0	7165	conf->authmode = MBEDTLS_SSL_VERIFY_REQUIRED;
nexpaq	0:6c56fb4bc5f0	7166	#if defined(MBEDTLS_SSL_SESSION_TICKETS)
nexpaq	0:6c56fb4bc5f0	7167	conf->session_tickets = MBEDTLS_SSL_SESSION_TICKETS_ENABLED;
nexpaq	0:6c56fb4bc5f0	7168	#endif
nexpaq	0:6c56fb4bc5f0	7169	}
nexpaq	0:6c56fb4bc5f0	7170	#endif
nexpaq	0:6c56fb4bc5f0	7171
nexpaq	0:6c56fb4bc5f0	7172	#if defined(MBEDTLS_ARC4_C)
nexpaq	0:6c56fb4bc5f0	7173	conf->arc4_disabled = MBEDTLS_SSL_ARC4_DISABLED;
nexpaq	0:6c56fb4bc5f0	7174	#endif
nexpaq	0:6c56fb4bc5f0	7175
nexpaq	0:6c56fb4bc5f0	7176	#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
nexpaq	0:6c56fb4bc5f0	7177	conf->encrypt_then_mac = MBEDTLS_SSL_ETM_ENABLED;
nexpaq	0:6c56fb4bc5f0	7178	#endif
nexpaq	0:6c56fb4bc5f0	7179
nexpaq	0:6c56fb4bc5f0	7180	#if defined(MBEDTLS_SSL_EXTENDED_MASTER_SECRET)
nexpaq	0:6c56fb4bc5f0	7181	conf->extended_ms = MBEDTLS_SSL_EXTENDED_MS_ENABLED;
nexpaq	0:6c56fb4bc5f0	7182	#endif
nexpaq	0:6c56fb4bc5f0	7183
nexpaq	0:6c56fb4bc5f0	7184	#if defined(MBEDTLS_SSL_CBC_RECORD_SPLITTING)
nexpaq	0:6c56fb4bc5f0	7185	conf->cbc_record_splitting = MBEDTLS_SSL_CBC_RECORD_SPLITTING_ENABLED;
nexpaq	0:6c56fb4bc5f0	7186	#endif
nexpaq	0:6c56fb4bc5f0	7187
nexpaq	0:6c56fb4bc5f0	7188	#if defined(MBEDTLS_SSL_DTLS_HELLO_VERIFY) && defined(MBEDTLS_SSL_SRV_C)
nexpaq	0:6c56fb4bc5f0	7189	conf->f_cookie_write = ssl_cookie_write_dummy;
nexpaq	0:6c56fb4bc5f0	7190	conf->f_cookie_check = ssl_cookie_check_dummy;
nexpaq	0:6c56fb4bc5f0	7191	#endif
nexpaq	0:6c56fb4bc5f0	7192
nexpaq	0:6c56fb4bc5f0	7193	#if defined(MBEDTLS_SSL_DTLS_ANTI_REPLAY)
nexpaq	0:6c56fb4bc5f0	7194	conf->anti_replay = MBEDTLS_SSL_ANTI_REPLAY_ENABLED;
nexpaq	0:6c56fb4bc5f0	7195	#endif
nexpaq	0:6c56fb4bc5f0	7196
nexpaq	0:6c56fb4bc5f0	7197	#if defined(MBEDTLS_SSL_PROTO_DTLS)
nexpaq	0:6c56fb4bc5f0	7198	conf->hs_timeout_min = MBEDTLS_SSL_DTLS_TIMEOUT_DFL_MIN;
nexpaq	0:6c56fb4bc5f0	7199	conf->hs_timeout_max = MBEDTLS_SSL_DTLS_TIMEOUT_DFL_MAX;
nexpaq	0:6c56fb4bc5f0	7200	#endif
nexpaq	0:6c56fb4bc5f0	7201
nexpaq	0:6c56fb4bc5f0	7202	#if defined(MBEDTLS_SSL_RENEGOTIATION)
nexpaq	0:6c56fb4bc5f0	7203	conf->renego_max_records = MBEDTLS_SSL_RENEGO_MAX_RECORDS_DEFAULT;
nexpaq	0:6c56fb4bc5f0	7204	memset( conf->renego_period, 0xFF, 7 );
nexpaq	0:6c56fb4bc5f0	7205	conf->renego_period[7] = 0x00;
nexpaq	0:6c56fb4bc5f0	7206	#endif
nexpaq	0:6c56fb4bc5f0	7207
nexpaq	0:6c56fb4bc5f0	7208	#if defined(MBEDTLS_DHM_C) && defined(MBEDTLS_SSL_SRV_C)
nexpaq	0:6c56fb4bc5f0	7209	if( endpoint == MBEDTLS_SSL_IS_SERVER )
nexpaq	0:6c56fb4bc5f0	7210	{
nexpaq	0:6c56fb4bc5f0	7211	if( ( ret = mbedtls_ssl_conf_dh_param( conf,
nexpaq	0:6c56fb4bc5f0	7212	MBEDTLS_DHM_RFC5114_MODP_2048_P,
nexpaq	0:6c56fb4bc5f0	7213	MBEDTLS_DHM_RFC5114_MODP_2048_G ) ) != 0 )
nexpaq	0:6c56fb4bc5f0	7214	{
nexpaq	0:6c56fb4bc5f0	7215	return( ret );
nexpaq	0:6c56fb4bc5f0	7216	}
nexpaq	0:6c56fb4bc5f0	7217	}
nexpaq	0:6c56fb4bc5f0	7218	#endif
nexpaq	0:6c56fb4bc5f0	7219
nexpaq	0:6c56fb4bc5f0	7220	/*
nexpaq	0:6c56fb4bc5f0	7221	* Preset-specific defaults
nexpaq	0:6c56fb4bc5f0	7222	*/
nexpaq	0:6c56fb4bc5f0	7223	switch( preset )
nexpaq	0:6c56fb4bc5f0	7224	{
nexpaq	0:6c56fb4bc5f0	7225	/*
nexpaq	0:6c56fb4bc5f0	7226	* NSA Suite B
nexpaq	0:6c56fb4bc5f0	7227	*/
nexpaq	0:6c56fb4bc5f0	7228	case MBEDTLS_SSL_PRESET_SUITEB:
nexpaq	0:6c56fb4bc5f0	7229	conf->min_major_ver = MBEDTLS_SSL_MAJOR_VERSION_3;
nexpaq	0:6c56fb4bc5f0	7230	conf->min_minor_ver = MBEDTLS_SSL_MINOR_VERSION_3; /* TLS 1.2 */
nexpaq	0:6c56fb4bc5f0	7231	conf->max_major_ver = MBEDTLS_SSL_MAX_MAJOR_VERSION;
nexpaq	0:6c56fb4bc5f0	7232	conf->max_minor_ver = MBEDTLS_SSL_MAX_MINOR_VERSION;
nexpaq	0:6c56fb4bc5f0	7233
nexpaq	0:6c56fb4bc5f0	7234	conf->ciphersuite_list[MBEDTLS_SSL_MINOR_VERSION_0] =
nexpaq	0:6c56fb4bc5f0	7235	conf->ciphersuite_list[MBEDTLS_SSL_MINOR_VERSION_1] =
nexpaq	0:6c56fb4bc5f0	7236	conf->ciphersuite_list[MBEDTLS_SSL_MINOR_VERSION_2] =
nexpaq	0:6c56fb4bc5f0	7237	conf->ciphersuite_list[MBEDTLS_SSL_MINOR_VERSION_3] =
nexpaq	0:6c56fb4bc5f0	7238	ssl_preset_suiteb_ciphersuites;
nexpaq	0:6c56fb4bc5f0	7239
nexpaq	0:6c56fb4bc5f0	7240	#if defined(MBEDTLS_X509_CRT_PARSE_C)
nexpaq	0:6c56fb4bc5f0	7241	conf->cert_profile = &mbedtls_x509_crt_profile_suiteb;
nexpaq	0:6c56fb4bc5f0	7242	#endif
nexpaq	0:6c56fb4bc5f0	7243
nexpaq	0:6c56fb4bc5f0	7244	#if defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
nexpaq	0:6c56fb4bc5f0	7245	conf->sig_hashes = ssl_preset_suiteb_hashes;
nexpaq	0:6c56fb4bc5f0	7246	#endif
nexpaq	0:6c56fb4bc5f0	7247
nexpaq	0:6c56fb4bc5f0	7248	#if defined(MBEDTLS_ECP_C)
nexpaq	0:6c56fb4bc5f0	7249	conf->curve_list = ssl_preset_suiteb_curves;
nexpaq	0:6c56fb4bc5f0	7250	#endif
nexpaq	0:6c56fb4bc5f0	7251	break;
nexpaq	0:6c56fb4bc5f0	7252
nexpaq	0:6c56fb4bc5f0	7253	/*
nexpaq	0:6c56fb4bc5f0	7254	* Default
nexpaq	0:6c56fb4bc5f0	7255	*/
nexpaq	0:6c56fb4bc5f0	7256	default:
nexpaq	0:6c56fb4bc5f0	7257	conf->min_major_ver = MBEDTLS_SSL_MAJOR_VERSION_3;
nexpaq	0:6c56fb4bc5f0	7258	conf->min_minor_ver = MBEDTLS_SSL_MINOR_VERSION_1; /* TLS 1.0 */
nexpaq	0:6c56fb4bc5f0	7259	conf->max_major_ver = MBEDTLS_SSL_MAX_MAJOR_VERSION;
nexpaq	0:6c56fb4bc5f0	7260	conf->max_minor_ver = MBEDTLS_SSL_MAX_MINOR_VERSION;
nexpaq	0:6c56fb4bc5f0	7261
nexpaq	0:6c56fb4bc5f0	7262	#if defined(MBEDTLS_SSL_PROTO_DTLS)
nexpaq	0:6c56fb4bc5f0	7263	if( transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
nexpaq	0:6c56fb4bc5f0	7264	conf->min_minor_ver = MBEDTLS_SSL_MINOR_VERSION_2;
nexpaq	0:6c56fb4bc5f0	7265	#endif
nexpaq	0:6c56fb4bc5f0	7266
nexpaq	0:6c56fb4bc5f0	7267	conf->ciphersuite_list[MBEDTLS_SSL_MINOR_VERSION_0] =
nexpaq	0:6c56fb4bc5f0	7268	conf->ciphersuite_list[MBEDTLS_SSL_MINOR_VERSION_1] =
nexpaq	0:6c56fb4bc5f0	7269	conf->ciphersuite_list[MBEDTLS_SSL_MINOR_VERSION_2] =
nexpaq	0:6c56fb4bc5f0	7270	conf->ciphersuite_list[MBEDTLS_SSL_MINOR_VERSION_3] =
nexpaq	0:6c56fb4bc5f0	7271	mbedtls_ssl_list_ciphersuites();
nexpaq	0:6c56fb4bc5f0	7272
nexpaq	0:6c56fb4bc5f0	7273	#if defined(MBEDTLS_X509_CRT_PARSE_C)
nexpaq	0:6c56fb4bc5f0	7274	conf->cert_profile = &mbedtls_x509_crt_profile_default;
nexpaq	0:6c56fb4bc5f0	7275	#endif
nexpaq	0:6c56fb4bc5f0	7276
nexpaq	0:6c56fb4bc5f0	7277	#if defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
nexpaq	0:6c56fb4bc5f0	7278	conf->sig_hashes = ssl_preset_default_hashes;
nexpaq	0:6c56fb4bc5f0	7279	#endif
nexpaq	0:6c56fb4bc5f0	7280
nexpaq	0:6c56fb4bc5f0	7281	#if defined(MBEDTLS_ECP_C)
nexpaq	0:6c56fb4bc5f0	7282	conf->curve_list = mbedtls_ecp_grp_id_list();
nexpaq	0:6c56fb4bc5f0	7283	#endif
nexpaq	0:6c56fb4bc5f0	7284
nexpaq	0:6c56fb4bc5f0	7285	#if defined(MBEDTLS_DHM_C) && defined(MBEDTLS_SSL_CLI_C)
nexpaq	0:6c56fb4bc5f0	7286	conf->dhm_min_bitlen = 1024;
nexpaq	0:6c56fb4bc5f0	7287	#endif
nexpaq	0:6c56fb4bc5f0	7288	}
nexpaq	0:6c56fb4bc5f0	7289
nexpaq	0:6c56fb4bc5f0	7290	return( 0 );
nexpaq	0:6c56fb4bc5f0	7291	}
nexpaq	0:6c56fb4bc5f0	7292
nexpaq	0:6c56fb4bc5f0	7293	/*
nexpaq	0:6c56fb4bc5f0	7294	* Free mbedtls_ssl_config
nexpaq	0:6c56fb4bc5f0	7295	*/
nexpaq	0:6c56fb4bc5f0	7296	void mbedtls_ssl_config_free( mbedtls_ssl_config *conf )
nexpaq	0:6c56fb4bc5f0	7297	{
nexpaq	0:6c56fb4bc5f0	7298	#if defined(MBEDTLS_DHM_C)
nexpaq	0:6c56fb4bc5f0	7299	mbedtls_mpi_free( &conf->dhm_P );
nexpaq	0:6c56fb4bc5f0	7300	mbedtls_mpi_free( &conf->dhm_G );
nexpaq	0:6c56fb4bc5f0	7301	#endif
nexpaq	0:6c56fb4bc5f0	7302
nexpaq	0:6c56fb4bc5f0	7303	#if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
nexpaq	0:6c56fb4bc5f0	7304	if( conf->psk != NULL )
nexpaq	0:6c56fb4bc5f0	7305	{
nexpaq	0:6c56fb4bc5f0	7306	mbedtls_zeroize( conf->psk, conf->psk_len );
nexpaq	0:6c56fb4bc5f0	7307	mbedtls_zeroize( conf->psk_identity, conf->psk_identity_len );
nexpaq	0:6c56fb4bc5f0	7308	mbedtls_free( conf->psk );
nexpaq	0:6c56fb4bc5f0	7309	mbedtls_free( conf->psk_identity );
nexpaq	0:6c56fb4bc5f0	7310	conf->psk_len = 0;
nexpaq	0:6c56fb4bc5f0	7311	conf->psk_identity_len = 0;
nexpaq	0:6c56fb4bc5f0	7312	}
nexpaq	0:6c56fb4bc5f0	7313	#endif
nexpaq	0:6c56fb4bc5f0	7314
nexpaq	0:6c56fb4bc5f0	7315	#if defined(MBEDTLS_X509_CRT_PARSE_C)
nexpaq	0:6c56fb4bc5f0	7316	ssl_key_cert_free( conf->key_cert );
nexpaq	0:6c56fb4bc5f0	7317	#endif
nexpaq	0:6c56fb4bc5f0	7318
nexpaq	0:6c56fb4bc5f0	7319	mbedtls_zeroize( conf, sizeof( mbedtls_ssl_config ) );
nexpaq	0:6c56fb4bc5f0	7320	}
nexpaq	0:6c56fb4bc5f0	7321
nexpaq	0:6c56fb4bc5f0	7322	#if defined(MBEDTLS_PK_C) && \
nexpaq	0:6c56fb4bc5f0	7323	( defined(MBEDTLS_RSA_C) \|\| defined(MBEDTLS_ECDSA_C) )
nexpaq	0:6c56fb4bc5f0	7324	/*
nexpaq	0:6c56fb4bc5f0	7325	* Convert between MBEDTLS_PK_XXX and SSL_SIG_XXX
nexpaq	0:6c56fb4bc5f0	7326	*/
nexpaq	0:6c56fb4bc5f0	7327	unsigned char mbedtls_ssl_sig_from_pk( mbedtls_pk_context *pk )
nexpaq	0:6c56fb4bc5f0	7328	{
nexpaq	0:6c56fb4bc5f0	7329	#if defined(MBEDTLS_RSA_C)
nexpaq	0:6c56fb4bc5f0	7330	if( mbedtls_pk_can_do( pk, MBEDTLS_PK_RSA ) )
nexpaq	0:6c56fb4bc5f0	7331	return( MBEDTLS_SSL_SIG_RSA );
nexpaq	0:6c56fb4bc5f0	7332	#endif
nexpaq	0:6c56fb4bc5f0	7333	#if defined(MBEDTLS_ECDSA_C)
nexpaq	0:6c56fb4bc5f0	7334	if( mbedtls_pk_can_do( pk, MBEDTLS_PK_ECDSA ) )
nexpaq	0:6c56fb4bc5f0	7335	return( MBEDTLS_SSL_SIG_ECDSA );
nexpaq	0:6c56fb4bc5f0	7336	#endif
nexpaq	0:6c56fb4bc5f0	7337	return( MBEDTLS_SSL_SIG_ANON );
nexpaq	0:6c56fb4bc5f0	7338	}
nexpaq	0:6c56fb4bc5f0	7339
nexpaq	0:6c56fb4bc5f0	7340	mbedtls_pk_type_t mbedtls_ssl_pk_alg_from_sig( unsigned char sig )
nexpaq	0:6c56fb4bc5f0	7341	{
nexpaq	0:6c56fb4bc5f0	7342	switch( sig )
nexpaq	0:6c56fb4bc5f0	7343	{
nexpaq	0:6c56fb4bc5f0	7344	#if defined(MBEDTLS_RSA_C)
nexpaq	0:6c56fb4bc5f0	7345	case MBEDTLS_SSL_SIG_RSA:
nexpaq	0:6c56fb4bc5f0	7346	return( MBEDTLS_PK_RSA );
nexpaq	0:6c56fb4bc5f0	7347	#endif
nexpaq	0:6c56fb4bc5f0	7348	#if defined(MBEDTLS_ECDSA_C)
nexpaq	0:6c56fb4bc5f0	7349	case MBEDTLS_SSL_SIG_ECDSA:
nexpaq	0:6c56fb4bc5f0	7350	return( MBEDTLS_PK_ECDSA );
nexpaq	0:6c56fb4bc5f0	7351	#endif
nexpaq	0:6c56fb4bc5f0	7352	default:
nexpaq	0:6c56fb4bc5f0	7353	return( MBEDTLS_PK_NONE );
nexpaq	0:6c56fb4bc5f0	7354	}
nexpaq	0:6c56fb4bc5f0	7355	}
nexpaq	0:6c56fb4bc5f0	7356	#endif /* MBEDTLS_PK_C && ( MBEDTLS_RSA_C \|\| MBEDTLS_ECDSA_C ) */
nexpaq	0:6c56fb4bc5f0	7357
nexpaq	0:6c56fb4bc5f0	7358	/*
nexpaq	0:6c56fb4bc5f0	7359	* Convert from MBEDTLS_SSL_HASH_XXX to MBEDTLS_MD_XXX
nexpaq	0:6c56fb4bc5f0	7360	*/
nexpaq	0:6c56fb4bc5f0	7361	mbedtls_md_type_t mbedtls_ssl_md_alg_from_hash( unsigned char hash )
nexpaq	0:6c56fb4bc5f0	7362	{
nexpaq	0:6c56fb4bc5f0	7363	switch( hash )
nexpaq	0:6c56fb4bc5f0	7364	{
nexpaq	0:6c56fb4bc5f0	7365	#if defined(MBEDTLS_MD5_C)
nexpaq	0:6c56fb4bc5f0	7366	case MBEDTLS_SSL_HASH_MD5:
nexpaq	0:6c56fb4bc5f0	7367	return( MBEDTLS_MD_MD5 );
nexpaq	0:6c56fb4bc5f0	7368	#endif
nexpaq	0:6c56fb4bc5f0	7369	#if defined(MBEDTLS_SHA1_C)
nexpaq	0:6c56fb4bc5f0	7370	case MBEDTLS_SSL_HASH_SHA1:
nexpaq	0:6c56fb4bc5f0	7371	return( MBEDTLS_MD_SHA1 );
nexpaq	0:6c56fb4bc5f0	7372	#endif
nexpaq	0:6c56fb4bc5f0	7373	#if defined(MBEDTLS_SHA256_C)
nexpaq	0:6c56fb4bc5f0	7374	case MBEDTLS_SSL_HASH_SHA224:
nexpaq	0:6c56fb4bc5f0	7375	return( MBEDTLS_MD_SHA224 );
nexpaq	0:6c56fb4bc5f0	7376	case MBEDTLS_SSL_HASH_SHA256:
nexpaq	0:6c56fb4bc5f0	7377	return( MBEDTLS_MD_SHA256 );
nexpaq	0:6c56fb4bc5f0	7378	#endif
nexpaq	0:6c56fb4bc5f0	7379	#if defined(MBEDTLS_SHA512_C)
nexpaq	0:6c56fb4bc5f0	7380	case MBEDTLS_SSL_HASH_SHA384:
nexpaq	0:6c56fb4bc5f0	7381	return( MBEDTLS_MD_SHA384 );
nexpaq	0:6c56fb4bc5f0	7382	case MBEDTLS_SSL_HASH_SHA512:
nexpaq	0:6c56fb4bc5f0	7383	return( MBEDTLS_MD_SHA512 );
nexpaq	0:6c56fb4bc5f0	7384	#endif
nexpaq	0:6c56fb4bc5f0	7385	default:
nexpaq	0:6c56fb4bc5f0	7386	return( MBEDTLS_MD_NONE );
nexpaq	0:6c56fb4bc5f0	7387	}
nexpaq	0:6c56fb4bc5f0	7388	}
nexpaq	0:6c56fb4bc5f0	7389
nexpaq	0:6c56fb4bc5f0	7390	/*
nexpaq	0:6c56fb4bc5f0	7391	* Convert from MBEDTLS_MD_XXX to MBEDTLS_SSL_HASH_XXX
nexpaq	0:6c56fb4bc5f0	7392	*/
nexpaq	0:6c56fb4bc5f0	7393	unsigned char mbedtls_ssl_hash_from_md_alg( int md )
nexpaq	0:6c56fb4bc5f0	7394	{
nexpaq	0:6c56fb4bc5f0	7395	switch( md )
nexpaq	0:6c56fb4bc5f0	7396	{
nexpaq	0:6c56fb4bc5f0	7397	#if defined(MBEDTLS_MD5_C)
nexpaq	0:6c56fb4bc5f0	7398	case MBEDTLS_MD_MD5:
nexpaq	0:6c56fb4bc5f0	7399	return( MBEDTLS_SSL_HASH_MD5 );
nexpaq	0:6c56fb4bc5f0	7400	#endif
nexpaq	0:6c56fb4bc5f0	7401	#if defined(MBEDTLS_SHA1_C)
nexpaq	0:6c56fb4bc5f0	7402	case MBEDTLS_MD_SHA1:
nexpaq	0:6c56fb4bc5f0	7403	return( MBEDTLS_SSL_HASH_SHA1 );
nexpaq	0:6c56fb4bc5f0	7404	#endif
nexpaq	0:6c56fb4bc5f0	7405	#if defined(MBEDTLS_SHA256_C)
nexpaq	0:6c56fb4bc5f0	7406	case MBEDTLS_MD_SHA224:
nexpaq	0:6c56fb4bc5f0	7407	return( MBEDTLS_SSL_HASH_SHA224 );
nexpaq	0:6c56fb4bc5f0	7408	case MBEDTLS_MD_SHA256:
nexpaq	0:6c56fb4bc5f0	7409	return( MBEDTLS_SSL_HASH_SHA256 );
nexpaq	0:6c56fb4bc5f0	7410	#endif
nexpaq	0:6c56fb4bc5f0	7411	#if defined(MBEDTLS_SHA512_C)
nexpaq	0:6c56fb4bc5f0	7412	case MBEDTLS_MD_SHA384:
nexpaq	0:6c56fb4bc5f0	7413	return( MBEDTLS_SSL_HASH_SHA384 );
nexpaq	0:6c56fb4bc5f0	7414	case MBEDTLS_MD_SHA512:
nexpaq	0:6c56fb4bc5f0	7415	return( MBEDTLS_SSL_HASH_SHA512 );
nexpaq	0:6c56fb4bc5f0	7416	#endif
nexpaq	0:6c56fb4bc5f0	7417	default:
nexpaq	0:6c56fb4bc5f0	7418	return( MBEDTLS_SSL_HASH_NONE );
nexpaq	0:6c56fb4bc5f0	7419	}
nexpaq	0:6c56fb4bc5f0	7420	}
nexpaq	0:6c56fb4bc5f0	7421
nexpaq	0:6c56fb4bc5f0	7422	#if defined(MBEDTLS_ECP_C)
nexpaq	0:6c56fb4bc5f0	7423	/*
nexpaq	0:6c56fb4bc5f0	7424	* Check if a curve proposed by the peer is in our list.
nexpaq	0:6c56fb4bc5f0	7425	* Return 0 if we're willing to use it, -1 otherwise.
nexpaq	0:6c56fb4bc5f0	7426	*/
nexpaq	0:6c56fb4bc5f0	7427	int mbedtls_ssl_check_curve( const mbedtls_ssl_context *ssl, mbedtls_ecp_group_id grp_id )
nexpaq	0:6c56fb4bc5f0	7428	{
nexpaq	0:6c56fb4bc5f0	7429	const mbedtls_ecp_group_id *gid;
nexpaq	0:6c56fb4bc5f0	7430
nexpaq	0:6c56fb4bc5f0	7431	if( ssl->conf->curve_list == NULL )
nexpaq	0:6c56fb4bc5f0	7432	return( -1 );
nexpaq	0:6c56fb4bc5f0	7433
nexpaq	0:6c56fb4bc5f0	7434	for( gid = ssl->conf->curve_list; *gid != MBEDTLS_ECP_DP_NONE; gid++ )
nexpaq	0:6c56fb4bc5f0	7435	if( *gid == grp_id )
nexpaq	0:6c56fb4bc5f0	7436	return( 0 );
nexpaq	0:6c56fb4bc5f0	7437
nexpaq	0:6c56fb4bc5f0	7438	return( -1 );
nexpaq	0:6c56fb4bc5f0	7439	}
nexpaq	0:6c56fb4bc5f0	7440	#endif /* MBEDTLS_ECP_C */
nexpaq	0:6c56fb4bc5f0	7441
nexpaq	0:6c56fb4bc5f0	7442	#if defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
nexpaq	0:6c56fb4bc5f0	7443	/*
nexpaq	0:6c56fb4bc5f0	7444	* Check if a hash proposed by the peer is in our list.
nexpaq	0:6c56fb4bc5f0	7445	* Return 0 if we're willing to use it, -1 otherwise.
nexpaq	0:6c56fb4bc5f0	7446	*/
nexpaq	0:6c56fb4bc5f0	7447	int mbedtls_ssl_check_sig_hash( const mbedtls_ssl_context *ssl,
nexpaq	0:6c56fb4bc5f0	7448	mbedtls_md_type_t md )
nexpaq	0:6c56fb4bc5f0	7449	{
nexpaq	0:6c56fb4bc5f0	7450	const int *cur;
nexpaq	0:6c56fb4bc5f0	7451
nexpaq	0:6c56fb4bc5f0	7452	if( ssl->conf->sig_hashes == NULL )
nexpaq	0:6c56fb4bc5f0	7453	return( -1 );
nexpaq	0:6c56fb4bc5f0	7454
nexpaq	0:6c56fb4bc5f0	7455	for( cur = ssl->conf->sig_hashes; *cur != MBEDTLS_MD_NONE; cur++ )
nexpaq	0:6c56fb4bc5f0	7456	if( *cur == (int) md )
nexpaq	0:6c56fb4bc5f0	7457	return( 0 );
nexpaq	0:6c56fb4bc5f0	7458
nexpaq	0:6c56fb4bc5f0	7459	return( -1 );
nexpaq	0:6c56fb4bc5f0	7460	}
nexpaq	0:6c56fb4bc5f0	7461	#endif /* MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED */
nexpaq	0:6c56fb4bc5f0	7462
nexpaq	0:6c56fb4bc5f0	7463	#if defined(MBEDTLS_X509_CRT_PARSE_C)
nexpaq	0:6c56fb4bc5f0	7464	int mbedtls_ssl_check_cert_usage( const mbedtls_x509_crt *cert,
nexpaq	0:6c56fb4bc5f0	7465	const mbedtls_ssl_ciphersuite_t *ciphersuite,
nexpaq	0:6c56fb4bc5f0	7466	int cert_endpoint,
nexpaq	0:6c56fb4bc5f0	7467	uint32_t *flags )
nexpaq	0:6c56fb4bc5f0	7468	{
nexpaq	0:6c56fb4bc5f0	7469	int ret = 0;
nexpaq	0:6c56fb4bc5f0	7470	#if defined(MBEDTLS_X509_CHECK_KEY_USAGE)
nexpaq	0:6c56fb4bc5f0	7471	int usage = 0;
nexpaq	0:6c56fb4bc5f0	7472	#endif
nexpaq	0:6c56fb4bc5f0	7473	#if defined(MBEDTLS_X509_CHECK_EXTENDED_KEY_USAGE)
nexpaq	0:6c56fb4bc5f0	7474	const char *ext_oid;
nexpaq	0:6c56fb4bc5f0	7475	size_t ext_len;
nexpaq	0:6c56fb4bc5f0	7476	#endif
nexpaq	0:6c56fb4bc5f0	7477
nexpaq	0:6c56fb4bc5f0	7478	#if !defined(MBEDTLS_X509_CHECK_KEY_USAGE) && \
nexpaq	0:6c56fb4bc5f0	7479	!defined(MBEDTLS_X509_CHECK_EXTENDED_KEY_USAGE)
nexpaq	0:6c56fb4bc5f0	7480	((void) cert);
nexpaq	0:6c56fb4bc5f0	7481	((void) cert_endpoint);
nexpaq	0:6c56fb4bc5f0	7482	((void) flags);
nexpaq	0:6c56fb4bc5f0	7483	#endif
nexpaq	0:6c56fb4bc5f0	7484
nexpaq	0:6c56fb4bc5f0	7485	#if defined(MBEDTLS_X509_CHECK_KEY_USAGE)
nexpaq	0:6c56fb4bc5f0	7486	if( cert_endpoint == MBEDTLS_SSL_IS_SERVER )
nexpaq	0:6c56fb4bc5f0	7487	{
nexpaq	0:6c56fb4bc5f0	7488	/* Server part of the key exchange */
nexpaq	0:6c56fb4bc5f0	7489	switch( ciphersuite->key_exchange )
nexpaq	0:6c56fb4bc5f0	7490	{
nexpaq	0:6c56fb4bc5f0	7491	case MBEDTLS_KEY_EXCHANGE_RSA:
nexpaq	0:6c56fb4bc5f0	7492	case MBEDTLS_KEY_EXCHANGE_RSA_PSK:
nexpaq	0:6c56fb4bc5f0	7493	usage = MBEDTLS_X509_KU_KEY_ENCIPHERMENT;
nexpaq	0:6c56fb4bc5f0	7494	break;
nexpaq	0:6c56fb4bc5f0	7495
nexpaq	0:6c56fb4bc5f0	7496	case MBEDTLS_KEY_EXCHANGE_DHE_RSA:
nexpaq	0:6c56fb4bc5f0	7497	case MBEDTLS_KEY_EXCHANGE_ECDHE_RSA:
nexpaq	0:6c56fb4bc5f0	7498	case MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA:
nexpaq	0:6c56fb4bc5f0	7499	usage = MBEDTLS_X509_KU_DIGITAL_SIGNATURE;
nexpaq	0:6c56fb4bc5f0	7500	break;
nexpaq	0:6c56fb4bc5f0	7501
nexpaq	0:6c56fb4bc5f0	7502	case MBEDTLS_KEY_EXCHANGE_ECDH_RSA:
nexpaq	0:6c56fb4bc5f0	7503	case MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA:
nexpaq	0:6c56fb4bc5f0	7504	usage = MBEDTLS_X509_KU_KEY_AGREEMENT;
nexpaq	0:6c56fb4bc5f0	7505	break;
nexpaq	0:6c56fb4bc5f0	7506
nexpaq	0:6c56fb4bc5f0	7507	/* Don't use default: we want warnings when adding new values */
nexpaq	0:6c56fb4bc5f0	7508	case MBEDTLS_KEY_EXCHANGE_NONE:
nexpaq	0:6c56fb4bc5f0	7509	case MBEDTLS_KEY_EXCHANGE_PSK:
nexpaq	0:6c56fb4bc5f0	7510	case MBEDTLS_KEY_EXCHANGE_DHE_PSK:
nexpaq	0:6c56fb4bc5f0	7511	case MBEDTLS_KEY_EXCHANGE_ECDHE_PSK:
nexpaq	0:6c56fb4bc5f0	7512	case MBEDTLS_KEY_EXCHANGE_ECJPAKE:
nexpaq	0:6c56fb4bc5f0	7513	usage = 0;
nexpaq	0:6c56fb4bc5f0	7514	}
nexpaq	0:6c56fb4bc5f0	7515	}
nexpaq	0:6c56fb4bc5f0	7516	else
nexpaq	0:6c56fb4bc5f0	7517	{
nexpaq	0:6c56fb4bc5f0	7518	/* Client auth: we only implement rsa_sign and mbedtls_ecdsa_sign for now */
nexpaq	0:6c56fb4bc5f0	7519	usage = MBEDTLS_X509_KU_DIGITAL_SIGNATURE;
nexpaq	0:6c56fb4bc5f0	7520	}
nexpaq	0:6c56fb4bc5f0	7521
nexpaq	0:6c56fb4bc5f0	7522	if( mbedtls_x509_crt_check_key_usage( cert, usage ) != 0 )
nexpaq	0:6c56fb4bc5f0	7523	{
nexpaq	0:6c56fb4bc5f0	7524	*flags \|= MBEDTLS_X509_BADCERT_KEY_USAGE;
nexpaq	0:6c56fb4bc5f0	7525	ret = -1;
nexpaq	0:6c56fb4bc5f0	7526	}
nexpaq	0:6c56fb4bc5f0	7527	#else
nexpaq	0:6c56fb4bc5f0	7528	((void) ciphersuite);
nexpaq	0:6c56fb4bc5f0	7529	#endif /* MBEDTLS_X509_CHECK_KEY_USAGE */
nexpaq	0:6c56fb4bc5f0	7530
nexpaq	0:6c56fb4bc5f0	7531	#if defined(MBEDTLS_X509_CHECK_EXTENDED_KEY_USAGE)
nexpaq	0:6c56fb4bc5f0	7532	if( cert_endpoint == MBEDTLS_SSL_IS_SERVER )
nexpaq	0:6c56fb4bc5f0	7533	{
nexpaq	0:6c56fb4bc5f0	7534	ext_oid = MBEDTLS_OID_SERVER_AUTH;
nexpaq	0:6c56fb4bc5f0	7535	ext_len = MBEDTLS_OID_SIZE( MBEDTLS_OID_SERVER_AUTH );
nexpaq	0:6c56fb4bc5f0	7536	}
nexpaq	0:6c56fb4bc5f0	7537	else
nexpaq	0:6c56fb4bc5f0	7538	{
nexpaq	0:6c56fb4bc5f0	7539	ext_oid = MBEDTLS_OID_CLIENT_AUTH;
nexpaq	0:6c56fb4bc5f0	7540	ext_len = MBEDTLS_OID_SIZE( MBEDTLS_OID_CLIENT_AUTH );
nexpaq	0:6c56fb4bc5f0	7541	}
nexpaq	0:6c56fb4bc5f0	7542
nexpaq	0:6c56fb4bc5f0	7543	if( mbedtls_x509_crt_check_extended_key_usage( cert, ext_oid, ext_len ) != 0 )
nexpaq	0:6c56fb4bc5f0	7544	{
nexpaq	0:6c56fb4bc5f0	7545	*flags \|= MBEDTLS_X509_BADCERT_EXT_KEY_USAGE;
nexpaq	0:6c56fb4bc5f0	7546	ret = -1;
nexpaq	0:6c56fb4bc5f0	7547	}
nexpaq	0:6c56fb4bc5f0	7548	#endif /* MBEDTLS_X509_CHECK_EXTENDED_KEY_USAGE */
nexpaq	0:6c56fb4bc5f0	7549
nexpaq	0:6c56fb4bc5f0	7550	return( ret );
nexpaq	0:6c56fb4bc5f0	7551	}
nexpaq	0:6c56fb4bc5f0	7552	#endif /* MBEDTLS_X509_CRT_PARSE_C */
nexpaq	0:6c56fb4bc5f0	7553
nexpaq	0:6c56fb4bc5f0	7554	/*
nexpaq	0:6c56fb4bc5f0	7555	* Convert version numbers to/from wire format
nexpaq	0:6c56fb4bc5f0	7556	* and, for DTLS, to/from TLS equivalent.
nexpaq	0:6c56fb4bc5f0	7557	*
nexpaq	0:6c56fb4bc5f0	7558	* For TLS this is the identity.
nexpaq	0:6c56fb4bc5f0	7559	* For DTLS, use one complement (v -> 255 - v, and then map as follows:
nexpaq	0:6c56fb4bc5f0	7560	* 1.0 <-> 3.2 (DTLS 1.0 is based on TLS 1.1)
nexpaq	0:6c56fb4bc5f0	7561	* 1.x <-> 3.x+1 for x != 0 (DTLS 1.2 based on TLS 1.2)
nexpaq	0:6c56fb4bc5f0	7562	*/
nexpaq	0:6c56fb4bc5f0	7563	void mbedtls_ssl_write_version( int major, int minor, int transport,
nexpaq	0:6c56fb4bc5f0	7564	unsigned char ver[2] )
nexpaq	0:6c56fb4bc5f0	7565	{
nexpaq	0:6c56fb4bc5f0	7566	#if defined(MBEDTLS_SSL_PROTO_DTLS)
nexpaq	0:6c56fb4bc5f0	7567	if( transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
nexpaq	0:6c56fb4bc5f0	7568	{
nexpaq	0:6c56fb4bc5f0	7569	if( minor == MBEDTLS_SSL_MINOR_VERSION_2 )
nexpaq	0:6c56fb4bc5f0	7570	--minor; /* DTLS 1.0 stored as TLS 1.1 internally */
nexpaq	0:6c56fb4bc5f0	7571
nexpaq	0:6c56fb4bc5f0	7572	ver[0] = (unsigned char)( 255 - ( major - 2 ) );
nexpaq	0:6c56fb4bc5f0	7573	ver[1] = (unsigned char)( 255 - ( minor - 1 ) );
nexpaq	0:6c56fb4bc5f0	7574	}
nexpaq	0:6c56fb4bc5f0	7575	else
nexpaq	0:6c56fb4bc5f0	7576	#else
nexpaq	0:6c56fb4bc5f0	7577	((void) transport);
nexpaq	0:6c56fb4bc5f0	7578	#endif
nexpaq	0:6c56fb4bc5f0	7579	{
nexpaq	0:6c56fb4bc5f0	7580	ver[0] = (unsigned char) major;
nexpaq	0:6c56fb4bc5f0	7581	ver[1] = (unsigned char) minor;
nexpaq	0:6c56fb4bc5f0	7582	}
nexpaq	0:6c56fb4bc5f0	7583	}
nexpaq	0:6c56fb4bc5f0	7584
nexpaq	0:6c56fb4bc5f0	7585	void mbedtls_ssl_read_version( int major, int minor, int transport,
nexpaq	0:6c56fb4bc5f0	7586	const unsigned char ver[2] )
nexpaq	0:6c56fb4bc5f0	7587	{
nexpaq	0:6c56fb4bc5f0	7588	#if defined(MBEDTLS_SSL_PROTO_DTLS)
nexpaq	0:6c56fb4bc5f0	7589	if( transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
nexpaq	0:6c56fb4bc5f0	7590	{
nexpaq	0:6c56fb4bc5f0	7591	*major = 255 - ver[0] + 2;
nexpaq	0:6c56fb4bc5f0	7592	*minor = 255 - ver[1] + 1;
nexpaq	0:6c56fb4bc5f0	7593
nexpaq	0:6c56fb4bc5f0	7594	if( *minor == MBEDTLS_SSL_MINOR_VERSION_1 )
nexpaq	0:6c56fb4bc5f0	7595	++minor; / DTLS 1.0 stored as TLS 1.1 internally */
nexpaq	0:6c56fb4bc5f0	7596	}
nexpaq	0:6c56fb4bc5f0	7597	else
nexpaq	0:6c56fb4bc5f0	7598	#else
nexpaq	0:6c56fb4bc5f0	7599	((void) transport);
nexpaq	0:6c56fb4bc5f0	7600	#endif
nexpaq	0:6c56fb4bc5f0	7601	{
nexpaq	0:6c56fb4bc5f0	7602	*major = ver[0];
nexpaq	0:6c56fb4bc5f0	7603	*minor = ver[1];
nexpaq	0:6c56fb4bc5f0	7604	}
nexpaq	0:6c56fb4bc5f0	7605	}
nexpaq	0:6c56fb4bc5f0	7606
nexpaq	0:6c56fb4bc5f0	7607	#endif /* MBEDTLS_SSL_TLS_C */

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Type:	Library
Created:	04 Nov 2016
Imports:	5
Forks:	0
Commits:	2
Dependents:	0
Dependencies:	0
Followers:	1

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features/mbedtls/src/ssl_tls.c@0:6c56fb4bc5f0, 2016-11-04 (annotated)

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