STM32F7 Ethernet

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mbed-os/features/mbedtls/src/ssl_tls.c@0:fb8047b156bb, 2020-01-15 (annotated)

Committer:: rahul_dahiya
Date:: Wed Jan 15 15:57:15 2020 +0530
Revision:: 0:fb8047b156bb

STM32F7 LWIP

Who changed what in which revision?

User	Revision	Line number	New contents of line
rahul_dahiya	0:fb8047b156bb	1	/*
rahul_dahiya	0:fb8047b156bb	2	* SSLv3/TLSv1 shared functions
rahul_dahiya	0:fb8047b156bb	3	*
rahul_dahiya	0:fb8047b156bb	4	* Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
rahul_dahiya	0:fb8047b156bb	5	* SPDX-License-Identifier: Apache-2.0
rahul_dahiya	0:fb8047b156bb	6	*
rahul_dahiya	0:fb8047b156bb	7	* Licensed under the Apache License, Version 2.0 (the "License"); you may
rahul_dahiya	0:fb8047b156bb	8	* not use this file except in compliance with the License.
rahul_dahiya	0:fb8047b156bb	9	* You may obtain a copy of the License at
rahul_dahiya	0:fb8047b156bb	10	*
rahul_dahiya	0:fb8047b156bb	11	* http://www.apache.org/licenses/LICENSE-2.0
rahul_dahiya	0:fb8047b156bb	12	*
rahul_dahiya	0:fb8047b156bb	13	* Unless required by applicable law or agreed to in writing, software
rahul_dahiya	0:fb8047b156bb	14	* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
rahul_dahiya	0:fb8047b156bb	15	* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
rahul_dahiya	0:fb8047b156bb	16	* See the License for the specific language governing permissions and
rahul_dahiya	0:fb8047b156bb	17	* limitations under the License.
rahul_dahiya	0:fb8047b156bb	18	*
rahul_dahiya	0:fb8047b156bb	19	* This file is part of mbed TLS (https://tls.mbed.org)
rahul_dahiya	0:fb8047b156bb	20	*/
rahul_dahiya	0:fb8047b156bb	21	/*
rahul_dahiya	0:fb8047b156bb	22	* The SSL 3.0 specification was drafted by Netscape in 1996,
rahul_dahiya	0:fb8047b156bb	23	* and became an IETF standard in 1999.
rahul_dahiya	0:fb8047b156bb	24	*
rahul_dahiya	0:fb8047b156bb	25	* http://wp.netscape.com/eng/ssl3/
rahul_dahiya	0:fb8047b156bb	26	* http://www.ietf.org/rfc/rfc2246.txt
rahul_dahiya	0:fb8047b156bb	27	* http://www.ietf.org/rfc/rfc4346.txt
rahul_dahiya	0:fb8047b156bb	28	*/
rahul_dahiya	0:fb8047b156bb	29
rahul_dahiya	0:fb8047b156bb	30	#if !defined(MBEDTLS_CONFIG_FILE)
rahul_dahiya	0:fb8047b156bb	31	#include "mbedtls/config.h"
rahul_dahiya	0:fb8047b156bb	32	#else
rahul_dahiya	0:fb8047b156bb	33	#include MBEDTLS_CONFIG_FILE
rahul_dahiya	0:fb8047b156bb	34	#endif
rahul_dahiya	0:fb8047b156bb	35
rahul_dahiya	0:fb8047b156bb	36	#if defined(MBEDTLS_SSL_TLS_C)
rahul_dahiya	0:fb8047b156bb	37
rahul_dahiya	0:fb8047b156bb	38	#if defined(MBEDTLS_PLATFORM_C)
rahul_dahiya	0:fb8047b156bb	39	#include "mbedtls/platform.h"
rahul_dahiya	0:fb8047b156bb	40	#else
rahul_dahiya	0:fb8047b156bb	41	#include <stdlib.h>
rahul_dahiya	0:fb8047b156bb	42	#define mbedtls_calloc calloc
rahul_dahiya	0:fb8047b156bb	43	#define mbedtls_free free
rahul_dahiya	0:fb8047b156bb	44	#endif
rahul_dahiya	0:fb8047b156bb	45
rahul_dahiya	0:fb8047b156bb	46	#include "mbedtls/debug.h"
rahul_dahiya	0:fb8047b156bb	47	#include "mbedtls/ssl.h"
rahul_dahiya	0:fb8047b156bb	48	#include "mbedtls/ssl_internal.h"
rahul_dahiya	0:fb8047b156bb	49
rahul_dahiya	0:fb8047b156bb	50	#include <string.h>
rahul_dahiya	0:fb8047b156bb	51
rahul_dahiya	0:fb8047b156bb	52	#if defined(MBEDTLS_X509_CRT_PARSE_C)
rahul_dahiya	0:fb8047b156bb	53	#include "mbedtls/oid.h"
rahul_dahiya	0:fb8047b156bb	54	#endif
rahul_dahiya	0:fb8047b156bb	55
rahul_dahiya	0:fb8047b156bb	56	/* Implementation that should never be optimized out by the compiler */
rahul_dahiya	0:fb8047b156bb	57	static void mbedtls_zeroize( void *v, size_t n ) {
rahul_dahiya	0:fb8047b156bb	58	volatile unsigned char p = v; while( n-- ) p++ = 0;
rahul_dahiya	0:fb8047b156bb	59	}
rahul_dahiya	0:fb8047b156bb	60
rahul_dahiya	0:fb8047b156bb	61	/* Length of the "epoch" field in the record header */
rahul_dahiya	0:fb8047b156bb	62	static inline size_t ssl_ep_len( const mbedtls_ssl_context *ssl )
rahul_dahiya	0:fb8047b156bb	63	{
rahul_dahiya	0:fb8047b156bb	64	#if defined(MBEDTLS_SSL_PROTO_DTLS)
rahul_dahiya	0:fb8047b156bb	65	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
rahul_dahiya	0:fb8047b156bb	66	return( 2 );
rahul_dahiya	0:fb8047b156bb	67	#else
rahul_dahiya	0:fb8047b156bb	68	((void) ssl);
rahul_dahiya	0:fb8047b156bb	69	#endif
rahul_dahiya	0:fb8047b156bb	70	return( 0 );
rahul_dahiya	0:fb8047b156bb	71	}
rahul_dahiya	0:fb8047b156bb	72
rahul_dahiya	0:fb8047b156bb	73	/*
rahul_dahiya	0:fb8047b156bb	74	* Start a timer.
rahul_dahiya	0:fb8047b156bb	75	* Passing millisecs = 0 cancels a running timer.
rahul_dahiya	0:fb8047b156bb	76	*/
rahul_dahiya	0:fb8047b156bb	77	static void ssl_set_timer( mbedtls_ssl_context *ssl, uint32_t millisecs )
rahul_dahiya	0:fb8047b156bb	78	{
rahul_dahiya	0:fb8047b156bb	79	if( ssl->f_set_timer == NULL )
rahul_dahiya	0:fb8047b156bb	80	return;
rahul_dahiya	0:fb8047b156bb	81
rahul_dahiya	0:fb8047b156bb	82	MBEDTLS_SSL_DEBUG_MSG( 3, ( "set_timer to %d ms", (int) millisecs ) );
rahul_dahiya	0:fb8047b156bb	83	ssl->f_set_timer( ssl->p_timer, millisecs / 4, millisecs );
rahul_dahiya	0:fb8047b156bb	84	}
rahul_dahiya	0:fb8047b156bb	85
rahul_dahiya	0:fb8047b156bb	86	/*
rahul_dahiya	0:fb8047b156bb	87	* Return -1 is timer is expired, 0 if it isn't.
rahul_dahiya	0:fb8047b156bb	88	*/
rahul_dahiya	0:fb8047b156bb	89	static int ssl_check_timer( mbedtls_ssl_context *ssl )
rahul_dahiya	0:fb8047b156bb	90	{
rahul_dahiya	0:fb8047b156bb	91	if( ssl->f_get_timer == NULL )
rahul_dahiya	0:fb8047b156bb	92	return( 0 );
rahul_dahiya	0:fb8047b156bb	93
rahul_dahiya	0:fb8047b156bb	94	if( ssl->f_get_timer( ssl->p_timer ) == 2 )
rahul_dahiya	0:fb8047b156bb	95	{
rahul_dahiya	0:fb8047b156bb	96	MBEDTLS_SSL_DEBUG_MSG( 3, ( "timer expired" ) );
rahul_dahiya	0:fb8047b156bb	97	return( -1 );
rahul_dahiya	0:fb8047b156bb	98	}
rahul_dahiya	0:fb8047b156bb	99
rahul_dahiya	0:fb8047b156bb	100	return( 0 );
rahul_dahiya	0:fb8047b156bb	101	}
rahul_dahiya	0:fb8047b156bb	102
rahul_dahiya	0:fb8047b156bb	103	#if defined(MBEDTLS_SSL_PROTO_DTLS)
rahul_dahiya	0:fb8047b156bb	104	/*
rahul_dahiya	0:fb8047b156bb	105	* Double the retransmit timeout value, within the allowed range,
rahul_dahiya	0:fb8047b156bb	106	* returning -1 if the maximum value has already been reached.
rahul_dahiya	0:fb8047b156bb	107	*/
rahul_dahiya	0:fb8047b156bb	108	static int ssl_double_retransmit_timeout( mbedtls_ssl_context *ssl )
rahul_dahiya	0:fb8047b156bb	109	{
rahul_dahiya	0:fb8047b156bb	110	uint32_t new_timeout;
rahul_dahiya	0:fb8047b156bb	111
rahul_dahiya	0:fb8047b156bb	112	if( ssl->handshake->retransmit_timeout >= ssl->conf->hs_timeout_max )
rahul_dahiya	0:fb8047b156bb	113	return( -1 );
rahul_dahiya	0:fb8047b156bb	114
rahul_dahiya	0:fb8047b156bb	115	new_timeout = 2 * ssl->handshake->retransmit_timeout;
rahul_dahiya	0:fb8047b156bb	116
rahul_dahiya	0:fb8047b156bb	117	/* Avoid arithmetic overflow and range overflow */
rahul_dahiya	0:fb8047b156bb	118	if( new_timeout < ssl->handshake->retransmit_timeout \|\|
rahul_dahiya	0:fb8047b156bb	119	new_timeout > ssl->conf->hs_timeout_max )
rahul_dahiya	0:fb8047b156bb	120	{
rahul_dahiya	0:fb8047b156bb	121	new_timeout = ssl->conf->hs_timeout_max;
rahul_dahiya	0:fb8047b156bb	122	}
rahul_dahiya	0:fb8047b156bb	123
rahul_dahiya	0:fb8047b156bb	124	ssl->handshake->retransmit_timeout = new_timeout;
rahul_dahiya	0:fb8047b156bb	125	MBEDTLS_SSL_DEBUG_MSG( 3, ( "update timeout value to %d millisecs",
rahul_dahiya	0:fb8047b156bb	126	ssl->handshake->retransmit_timeout ) );
rahul_dahiya	0:fb8047b156bb	127
rahul_dahiya	0:fb8047b156bb	128	return( 0 );
rahul_dahiya	0:fb8047b156bb	129	}
rahul_dahiya	0:fb8047b156bb	130
rahul_dahiya	0:fb8047b156bb	131	static void ssl_reset_retransmit_timeout( mbedtls_ssl_context *ssl )
rahul_dahiya	0:fb8047b156bb	132	{
rahul_dahiya	0:fb8047b156bb	133	ssl->handshake->retransmit_timeout = ssl->conf->hs_timeout_min;
rahul_dahiya	0:fb8047b156bb	134	MBEDTLS_SSL_DEBUG_MSG( 3, ( "update timeout value to %d millisecs",
rahul_dahiya	0:fb8047b156bb	135	ssl->handshake->retransmit_timeout ) );
rahul_dahiya	0:fb8047b156bb	136	}
rahul_dahiya	0:fb8047b156bb	137	#endif /* MBEDTLS_SSL_PROTO_DTLS */
rahul_dahiya	0:fb8047b156bb	138
rahul_dahiya	0:fb8047b156bb	139	#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
rahul_dahiya	0:fb8047b156bb	140	/*
rahul_dahiya	0:fb8047b156bb	141	* Convert max_fragment_length codes to length.
rahul_dahiya	0:fb8047b156bb	142	* RFC 6066 says:
rahul_dahiya	0:fb8047b156bb	143	* enum{
rahul_dahiya	0:fb8047b156bb	144	* 2^9(1), 2^10(2), 2^11(3), 2^12(4), (255)
rahul_dahiya	0:fb8047b156bb	145	* } MaxFragmentLength;
rahul_dahiya	0:fb8047b156bb	146	* and we add 0 -> extension unused
rahul_dahiya	0:fb8047b156bb	147	*/
rahul_dahiya	0:fb8047b156bb	148	static unsigned int mfl_code_to_length[MBEDTLS_SSL_MAX_FRAG_LEN_INVALID] =
rahul_dahiya	0:fb8047b156bb	149	{
rahul_dahiya	0:fb8047b156bb	150	MBEDTLS_SSL_MAX_CONTENT_LEN, /* MBEDTLS_SSL_MAX_FRAG_LEN_NONE */
rahul_dahiya	0:fb8047b156bb	151	512, /* MBEDTLS_SSL_MAX_FRAG_LEN_512 */
rahul_dahiya	0:fb8047b156bb	152	1024, /* MBEDTLS_SSL_MAX_FRAG_LEN_1024 */
rahul_dahiya	0:fb8047b156bb	153	2048, /* MBEDTLS_SSL_MAX_FRAG_LEN_2048 */
rahul_dahiya	0:fb8047b156bb	154	4096, /* MBEDTLS_SSL_MAX_FRAG_LEN_4096 */
rahul_dahiya	0:fb8047b156bb	155	};
rahul_dahiya	0:fb8047b156bb	156	#endif /* MBEDTLS_SSL_MAX_FRAGMENT_LENGTH */
rahul_dahiya	0:fb8047b156bb	157
rahul_dahiya	0:fb8047b156bb	158	#if defined(MBEDTLS_SSL_CLI_C)
rahul_dahiya	0:fb8047b156bb	159	static int ssl_session_copy( mbedtls_ssl_session dst, const mbedtls_ssl_session src )
rahul_dahiya	0:fb8047b156bb	160	{
rahul_dahiya	0:fb8047b156bb	161	mbedtls_ssl_session_free( dst );
rahul_dahiya	0:fb8047b156bb	162	memcpy( dst, src, sizeof( mbedtls_ssl_session ) );
rahul_dahiya	0:fb8047b156bb	163
rahul_dahiya	0:fb8047b156bb	164	#if defined(MBEDTLS_X509_CRT_PARSE_C)
rahul_dahiya	0:fb8047b156bb	165	if( src->peer_cert != NULL )
rahul_dahiya	0:fb8047b156bb	166	{
rahul_dahiya	0:fb8047b156bb	167	int ret;
rahul_dahiya	0:fb8047b156bb	168
rahul_dahiya	0:fb8047b156bb	169	dst->peer_cert = mbedtls_calloc( 1, sizeof(mbedtls_x509_crt) );
rahul_dahiya	0:fb8047b156bb	170	if( dst->peer_cert == NULL )
rahul_dahiya	0:fb8047b156bb	171	return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
rahul_dahiya	0:fb8047b156bb	172
rahul_dahiya	0:fb8047b156bb	173	mbedtls_x509_crt_init( dst->peer_cert );
rahul_dahiya	0:fb8047b156bb	174
rahul_dahiya	0:fb8047b156bb	175	if( ( ret = mbedtls_x509_crt_parse_der( dst->peer_cert, src->peer_cert->raw.p,
rahul_dahiya	0:fb8047b156bb	176	src->peer_cert->raw.len ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	177	{
rahul_dahiya	0:fb8047b156bb	178	mbedtls_free( dst->peer_cert );
rahul_dahiya	0:fb8047b156bb	179	dst->peer_cert = NULL;
rahul_dahiya	0:fb8047b156bb	180	return( ret );
rahul_dahiya	0:fb8047b156bb	181	}
rahul_dahiya	0:fb8047b156bb	182	}
rahul_dahiya	0:fb8047b156bb	183	#endif /* MBEDTLS_X509_CRT_PARSE_C */
rahul_dahiya	0:fb8047b156bb	184
rahul_dahiya	0:fb8047b156bb	185	#if defined(MBEDTLS_SSL_SESSION_TICKETS) && defined(MBEDTLS_SSL_CLI_C)
rahul_dahiya	0:fb8047b156bb	186	if( src->ticket != NULL )
rahul_dahiya	0:fb8047b156bb	187	{
rahul_dahiya	0:fb8047b156bb	188	dst->ticket = mbedtls_calloc( 1, src->ticket_len );
rahul_dahiya	0:fb8047b156bb	189	if( dst->ticket == NULL )
rahul_dahiya	0:fb8047b156bb	190	return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
rahul_dahiya	0:fb8047b156bb	191
rahul_dahiya	0:fb8047b156bb	192	memcpy( dst->ticket, src->ticket, src->ticket_len );
rahul_dahiya	0:fb8047b156bb	193	}
rahul_dahiya	0:fb8047b156bb	194	#endif /* MBEDTLS_SSL_SESSION_TICKETS && MBEDTLS_SSL_CLI_C */
rahul_dahiya	0:fb8047b156bb	195
rahul_dahiya	0:fb8047b156bb	196	return( 0 );
rahul_dahiya	0:fb8047b156bb	197	}
rahul_dahiya	0:fb8047b156bb	198	#endif /* MBEDTLS_SSL_CLI_C */
rahul_dahiya	0:fb8047b156bb	199
rahul_dahiya	0:fb8047b156bb	200	#if defined(MBEDTLS_SSL_HW_RECORD_ACCEL)
rahul_dahiya	0:fb8047b156bb	201	int (mbedtls_ssl_hw_record_init)( mbedtls_ssl_context ssl,
rahul_dahiya	0:fb8047b156bb	202	const unsigned char key_enc, const unsigned char key_dec,
rahul_dahiya	0:fb8047b156bb	203	size_t keylen,
rahul_dahiya	0:fb8047b156bb	204	const unsigned char iv_enc, const unsigned char iv_dec,
rahul_dahiya	0:fb8047b156bb	205	size_t ivlen,
rahul_dahiya	0:fb8047b156bb	206	const unsigned char mac_enc, const unsigned char mac_dec,
rahul_dahiya	0:fb8047b156bb	207	size_t maclen ) = NULL;
rahul_dahiya	0:fb8047b156bb	208	int (mbedtls_ssl_hw_record_activate)( mbedtls_ssl_context ssl, int direction) = NULL;
rahul_dahiya	0:fb8047b156bb	209	int (mbedtls_ssl_hw_record_reset)( mbedtls_ssl_context ssl ) = NULL;
rahul_dahiya	0:fb8047b156bb	210	int (mbedtls_ssl_hw_record_write)( mbedtls_ssl_context ssl ) = NULL;
rahul_dahiya	0:fb8047b156bb	211	int (mbedtls_ssl_hw_record_read)( mbedtls_ssl_context ssl ) = NULL;
rahul_dahiya	0:fb8047b156bb	212	int (mbedtls_ssl_hw_record_finish)( mbedtls_ssl_context ssl ) = NULL;
rahul_dahiya	0:fb8047b156bb	213	#endif /* MBEDTLS_SSL_HW_RECORD_ACCEL */
rahul_dahiya	0:fb8047b156bb	214
rahul_dahiya	0:fb8047b156bb	215	/*
rahul_dahiya	0:fb8047b156bb	216	* Key material generation
rahul_dahiya	0:fb8047b156bb	217	*/
rahul_dahiya	0:fb8047b156bb	218	#if defined(MBEDTLS_SSL_PROTO_SSL3)
rahul_dahiya	0:fb8047b156bb	219	static int ssl3_prf( const unsigned char *secret, size_t slen,
rahul_dahiya	0:fb8047b156bb	220	const char *label,
rahul_dahiya	0:fb8047b156bb	221	const unsigned char *random, size_t rlen,
rahul_dahiya	0:fb8047b156bb	222	unsigned char *dstbuf, size_t dlen )
rahul_dahiya	0:fb8047b156bb	223	{
rahul_dahiya	0:fb8047b156bb	224	size_t i;
rahul_dahiya	0:fb8047b156bb	225	mbedtls_md5_context md5;
rahul_dahiya	0:fb8047b156bb	226	mbedtls_sha1_context sha1;
rahul_dahiya	0:fb8047b156bb	227	unsigned char padding[16];
rahul_dahiya	0:fb8047b156bb	228	unsigned char sha1sum[20];
rahul_dahiya	0:fb8047b156bb	229	((void)label);
rahul_dahiya	0:fb8047b156bb	230
rahul_dahiya	0:fb8047b156bb	231	mbedtls_md5_init( &md5 );
rahul_dahiya	0:fb8047b156bb	232	mbedtls_sha1_init( &sha1 );
rahul_dahiya	0:fb8047b156bb	233
rahul_dahiya	0:fb8047b156bb	234	/*
rahul_dahiya	0:fb8047b156bb	235	* SSLv3:
rahul_dahiya	0:fb8047b156bb	236	* block =
rahul_dahiya	0:fb8047b156bb	237	* MD5( secret + SHA1( 'A' + secret + random ) ) +
rahul_dahiya	0:fb8047b156bb	238	* MD5( secret + SHA1( 'BB' + secret + random ) ) +
rahul_dahiya	0:fb8047b156bb	239	* MD5( secret + SHA1( 'CCC' + secret + random ) ) +
rahul_dahiya	0:fb8047b156bb	240	* ...
rahul_dahiya	0:fb8047b156bb	241	*/
rahul_dahiya	0:fb8047b156bb	242	for( i = 0; i < dlen / 16; i++ )
rahul_dahiya	0:fb8047b156bb	243	{
rahul_dahiya	0:fb8047b156bb	244	memset( padding, (unsigned char) ('A' + i), 1 + i );
rahul_dahiya	0:fb8047b156bb	245
rahul_dahiya	0:fb8047b156bb	246	mbedtls_sha1_starts( &sha1 );
rahul_dahiya	0:fb8047b156bb	247	mbedtls_sha1_update( &sha1, padding, 1 + i );
rahul_dahiya	0:fb8047b156bb	248	mbedtls_sha1_update( &sha1, secret, slen );
rahul_dahiya	0:fb8047b156bb	249	mbedtls_sha1_update( &sha1, random, rlen );
rahul_dahiya	0:fb8047b156bb	250	mbedtls_sha1_finish( &sha1, sha1sum );
rahul_dahiya	0:fb8047b156bb	251
rahul_dahiya	0:fb8047b156bb	252	mbedtls_md5_starts( &md5 );
rahul_dahiya	0:fb8047b156bb	253	mbedtls_md5_update( &md5, secret, slen );
rahul_dahiya	0:fb8047b156bb	254	mbedtls_md5_update( &md5, sha1sum, 20 );
rahul_dahiya	0:fb8047b156bb	255	mbedtls_md5_finish( &md5, dstbuf + i * 16 );
rahul_dahiya	0:fb8047b156bb	256	}
rahul_dahiya	0:fb8047b156bb	257
rahul_dahiya	0:fb8047b156bb	258	mbedtls_md5_free( &md5 );
rahul_dahiya	0:fb8047b156bb	259	mbedtls_sha1_free( &sha1 );
rahul_dahiya	0:fb8047b156bb	260
rahul_dahiya	0:fb8047b156bb	261	mbedtls_zeroize( padding, sizeof( padding ) );
rahul_dahiya	0:fb8047b156bb	262	mbedtls_zeroize( sha1sum, sizeof( sha1sum ) );
rahul_dahiya	0:fb8047b156bb	263
rahul_dahiya	0:fb8047b156bb	264	return( 0 );
rahul_dahiya	0:fb8047b156bb	265	}
rahul_dahiya	0:fb8047b156bb	266	#endif /* MBEDTLS_SSL_PROTO_SSL3 */
rahul_dahiya	0:fb8047b156bb	267
rahul_dahiya	0:fb8047b156bb	268	#if defined(MBEDTLS_SSL_PROTO_TLS1) \|\| defined(MBEDTLS_SSL_PROTO_TLS1_1)
rahul_dahiya	0:fb8047b156bb	269	static int tls1_prf( const unsigned char *secret, size_t slen,
rahul_dahiya	0:fb8047b156bb	270	const char *label,
rahul_dahiya	0:fb8047b156bb	271	const unsigned char *random, size_t rlen,
rahul_dahiya	0:fb8047b156bb	272	unsigned char *dstbuf, size_t dlen )
rahul_dahiya	0:fb8047b156bb	273	{
rahul_dahiya	0:fb8047b156bb	274	size_t nb, hs;
rahul_dahiya	0:fb8047b156bb	275	size_t i, j, k;
rahul_dahiya	0:fb8047b156bb	276	const unsigned char S1, S2;
rahul_dahiya	0:fb8047b156bb	277	unsigned char tmp[128];
rahul_dahiya	0:fb8047b156bb	278	unsigned char h_i[20];
rahul_dahiya	0:fb8047b156bb	279	const mbedtls_md_info_t *md_info;
rahul_dahiya	0:fb8047b156bb	280	mbedtls_md_context_t md_ctx;
rahul_dahiya	0:fb8047b156bb	281	int ret;
rahul_dahiya	0:fb8047b156bb	282
rahul_dahiya	0:fb8047b156bb	283	mbedtls_md_init( &md_ctx );
rahul_dahiya	0:fb8047b156bb	284
rahul_dahiya	0:fb8047b156bb	285	if( sizeof( tmp ) < 20 + strlen( label ) + rlen )
rahul_dahiya	0:fb8047b156bb	286	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
rahul_dahiya	0:fb8047b156bb	287
rahul_dahiya	0:fb8047b156bb	288	hs = ( slen + 1 ) / 2;
rahul_dahiya	0:fb8047b156bb	289	S1 = secret;
rahul_dahiya	0:fb8047b156bb	290	S2 = secret + slen - hs;
rahul_dahiya	0:fb8047b156bb	291
rahul_dahiya	0:fb8047b156bb	292	nb = strlen( label );
rahul_dahiya	0:fb8047b156bb	293	memcpy( tmp + 20, label, nb );
rahul_dahiya	0:fb8047b156bb	294	memcpy( tmp + 20 + nb, random, rlen );
rahul_dahiya	0:fb8047b156bb	295	nb += rlen;
rahul_dahiya	0:fb8047b156bb	296
rahul_dahiya	0:fb8047b156bb	297	/*
rahul_dahiya	0:fb8047b156bb	298	* First compute P_md5(secret,label+random)[0..dlen]
rahul_dahiya	0:fb8047b156bb	299	*/
rahul_dahiya	0:fb8047b156bb	300	if( ( md_info = mbedtls_md_info_from_type( MBEDTLS_MD_MD5 ) ) == NULL )
rahul_dahiya	0:fb8047b156bb	301	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
rahul_dahiya	0:fb8047b156bb	302
rahul_dahiya	0:fb8047b156bb	303	if( ( ret = mbedtls_md_setup( &md_ctx, md_info, 1 ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	304	return( ret );
rahul_dahiya	0:fb8047b156bb	305
rahul_dahiya	0:fb8047b156bb	306	mbedtls_md_hmac_starts( &md_ctx, S1, hs );
rahul_dahiya	0:fb8047b156bb	307	mbedtls_md_hmac_update( &md_ctx, tmp + 20, nb );
rahul_dahiya	0:fb8047b156bb	308	mbedtls_md_hmac_finish( &md_ctx, 4 + tmp );
rahul_dahiya	0:fb8047b156bb	309
rahul_dahiya	0:fb8047b156bb	310	for( i = 0; i < dlen; i += 16 )
rahul_dahiya	0:fb8047b156bb	311	{
rahul_dahiya	0:fb8047b156bb	312	mbedtls_md_hmac_reset ( &md_ctx );
rahul_dahiya	0:fb8047b156bb	313	mbedtls_md_hmac_update( &md_ctx, 4 + tmp, 16 + nb );
rahul_dahiya	0:fb8047b156bb	314	mbedtls_md_hmac_finish( &md_ctx, h_i );
rahul_dahiya	0:fb8047b156bb	315
rahul_dahiya	0:fb8047b156bb	316	mbedtls_md_hmac_reset ( &md_ctx );
rahul_dahiya	0:fb8047b156bb	317	mbedtls_md_hmac_update( &md_ctx, 4 + tmp, 16 );
rahul_dahiya	0:fb8047b156bb	318	mbedtls_md_hmac_finish( &md_ctx, 4 + tmp );
rahul_dahiya	0:fb8047b156bb	319
rahul_dahiya	0:fb8047b156bb	320	k = ( i + 16 > dlen ) ? dlen % 16 : 16;
rahul_dahiya	0:fb8047b156bb	321
rahul_dahiya	0:fb8047b156bb	322	for( j = 0; j < k; j++ )
rahul_dahiya	0:fb8047b156bb	323	dstbuf[i + j] = h_i[j];
rahul_dahiya	0:fb8047b156bb	324	}
rahul_dahiya	0:fb8047b156bb	325
rahul_dahiya	0:fb8047b156bb	326	mbedtls_md_free( &md_ctx );
rahul_dahiya	0:fb8047b156bb	327
rahul_dahiya	0:fb8047b156bb	328	/*
rahul_dahiya	0:fb8047b156bb	329	* XOR out with P_sha1(secret,label+random)[0..dlen]
rahul_dahiya	0:fb8047b156bb	330	*/
rahul_dahiya	0:fb8047b156bb	331	if( ( md_info = mbedtls_md_info_from_type( MBEDTLS_MD_SHA1 ) ) == NULL )
rahul_dahiya	0:fb8047b156bb	332	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
rahul_dahiya	0:fb8047b156bb	333
rahul_dahiya	0:fb8047b156bb	334	if( ( ret = mbedtls_md_setup( &md_ctx, md_info, 1 ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	335	return( ret );
rahul_dahiya	0:fb8047b156bb	336
rahul_dahiya	0:fb8047b156bb	337	mbedtls_md_hmac_starts( &md_ctx, S2, hs );
rahul_dahiya	0:fb8047b156bb	338	mbedtls_md_hmac_update( &md_ctx, tmp + 20, nb );
rahul_dahiya	0:fb8047b156bb	339	mbedtls_md_hmac_finish( &md_ctx, tmp );
rahul_dahiya	0:fb8047b156bb	340
rahul_dahiya	0:fb8047b156bb	341	for( i = 0; i < dlen; i += 20 )
rahul_dahiya	0:fb8047b156bb	342	{
rahul_dahiya	0:fb8047b156bb	343	mbedtls_md_hmac_reset ( &md_ctx );
rahul_dahiya	0:fb8047b156bb	344	mbedtls_md_hmac_update( &md_ctx, tmp, 20 + nb );
rahul_dahiya	0:fb8047b156bb	345	mbedtls_md_hmac_finish( &md_ctx, h_i );
rahul_dahiya	0:fb8047b156bb	346
rahul_dahiya	0:fb8047b156bb	347	mbedtls_md_hmac_reset ( &md_ctx );
rahul_dahiya	0:fb8047b156bb	348	mbedtls_md_hmac_update( &md_ctx, tmp, 20 );
rahul_dahiya	0:fb8047b156bb	349	mbedtls_md_hmac_finish( &md_ctx, tmp );
rahul_dahiya	0:fb8047b156bb	350
rahul_dahiya	0:fb8047b156bb	351	k = ( i + 20 > dlen ) ? dlen % 20 : 20;
rahul_dahiya	0:fb8047b156bb	352
rahul_dahiya	0:fb8047b156bb	353	for( j = 0; j < k; j++ )
rahul_dahiya	0:fb8047b156bb	354	dstbuf[i + j] = (unsigned char)( dstbuf[i + j] ^ h_i[j] );
rahul_dahiya	0:fb8047b156bb	355	}
rahul_dahiya	0:fb8047b156bb	356
rahul_dahiya	0:fb8047b156bb	357	mbedtls_md_free( &md_ctx );
rahul_dahiya	0:fb8047b156bb	358
rahul_dahiya	0:fb8047b156bb	359	mbedtls_zeroize( tmp, sizeof( tmp ) );
rahul_dahiya	0:fb8047b156bb	360	mbedtls_zeroize( h_i, sizeof( h_i ) );
rahul_dahiya	0:fb8047b156bb	361
rahul_dahiya	0:fb8047b156bb	362	return( 0 );
rahul_dahiya	0:fb8047b156bb	363	}
rahul_dahiya	0:fb8047b156bb	364	#endif /* MBEDTLS_SSL_PROTO_TLS1) \|\| MBEDTLS_SSL_PROTO_TLS1_1 */
rahul_dahiya	0:fb8047b156bb	365
rahul_dahiya	0:fb8047b156bb	366	#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
rahul_dahiya	0:fb8047b156bb	367	static int tls_prf_generic( mbedtls_md_type_t md_type,
rahul_dahiya	0:fb8047b156bb	368	const unsigned char *secret, size_t slen,
rahul_dahiya	0:fb8047b156bb	369	const char *label,
rahul_dahiya	0:fb8047b156bb	370	const unsigned char *random, size_t rlen,
rahul_dahiya	0:fb8047b156bb	371	unsigned char *dstbuf, size_t dlen )
rahul_dahiya	0:fb8047b156bb	372	{
rahul_dahiya	0:fb8047b156bb	373	size_t nb;
rahul_dahiya	0:fb8047b156bb	374	size_t i, j, k, md_len;
rahul_dahiya	0:fb8047b156bb	375	unsigned char tmp[128];
rahul_dahiya	0:fb8047b156bb	376	unsigned char h_i[MBEDTLS_MD_MAX_SIZE];
rahul_dahiya	0:fb8047b156bb	377	const mbedtls_md_info_t *md_info;
rahul_dahiya	0:fb8047b156bb	378	mbedtls_md_context_t md_ctx;
rahul_dahiya	0:fb8047b156bb	379	int ret;
rahul_dahiya	0:fb8047b156bb	380
rahul_dahiya	0:fb8047b156bb	381	mbedtls_md_init( &md_ctx );
rahul_dahiya	0:fb8047b156bb	382
rahul_dahiya	0:fb8047b156bb	383	if( ( md_info = mbedtls_md_info_from_type( md_type ) ) == NULL )
rahul_dahiya	0:fb8047b156bb	384	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
rahul_dahiya	0:fb8047b156bb	385
rahul_dahiya	0:fb8047b156bb	386	md_len = mbedtls_md_get_size( md_info );
rahul_dahiya	0:fb8047b156bb	387
rahul_dahiya	0:fb8047b156bb	388	if( sizeof( tmp ) < md_len + strlen( label ) + rlen )
rahul_dahiya	0:fb8047b156bb	389	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
rahul_dahiya	0:fb8047b156bb	390
rahul_dahiya	0:fb8047b156bb	391	nb = strlen( label );
rahul_dahiya	0:fb8047b156bb	392	memcpy( tmp + md_len, label, nb );
rahul_dahiya	0:fb8047b156bb	393	memcpy( tmp + md_len + nb, random, rlen );
rahul_dahiya	0:fb8047b156bb	394	nb += rlen;
rahul_dahiya	0:fb8047b156bb	395
rahul_dahiya	0:fb8047b156bb	396	/*
rahul_dahiya	0:fb8047b156bb	397	* Compute P_<hash>(secret, label + random)[0..dlen]
rahul_dahiya	0:fb8047b156bb	398	*/
rahul_dahiya	0:fb8047b156bb	399	if ( ( ret = mbedtls_md_setup( &md_ctx, md_info, 1 ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	400	return( ret );
rahul_dahiya	0:fb8047b156bb	401
rahul_dahiya	0:fb8047b156bb	402	mbedtls_md_hmac_starts( &md_ctx, secret, slen );
rahul_dahiya	0:fb8047b156bb	403	mbedtls_md_hmac_update( &md_ctx, tmp + md_len, nb );
rahul_dahiya	0:fb8047b156bb	404	mbedtls_md_hmac_finish( &md_ctx, tmp );
rahul_dahiya	0:fb8047b156bb	405
rahul_dahiya	0:fb8047b156bb	406	for( i = 0; i < dlen; i += md_len )
rahul_dahiya	0:fb8047b156bb	407	{
rahul_dahiya	0:fb8047b156bb	408	mbedtls_md_hmac_reset ( &md_ctx );
rahul_dahiya	0:fb8047b156bb	409	mbedtls_md_hmac_update( &md_ctx, tmp, md_len + nb );
rahul_dahiya	0:fb8047b156bb	410	mbedtls_md_hmac_finish( &md_ctx, h_i );
rahul_dahiya	0:fb8047b156bb	411
rahul_dahiya	0:fb8047b156bb	412	mbedtls_md_hmac_reset ( &md_ctx );
rahul_dahiya	0:fb8047b156bb	413	mbedtls_md_hmac_update( &md_ctx, tmp, md_len );
rahul_dahiya	0:fb8047b156bb	414	mbedtls_md_hmac_finish( &md_ctx, tmp );
rahul_dahiya	0:fb8047b156bb	415
rahul_dahiya	0:fb8047b156bb	416	k = ( i + md_len > dlen ) ? dlen % md_len : md_len;
rahul_dahiya	0:fb8047b156bb	417
rahul_dahiya	0:fb8047b156bb	418	for( j = 0; j < k; j++ )
rahul_dahiya	0:fb8047b156bb	419	dstbuf[i + j] = h_i[j];
rahul_dahiya	0:fb8047b156bb	420	}
rahul_dahiya	0:fb8047b156bb	421
rahul_dahiya	0:fb8047b156bb	422	mbedtls_md_free( &md_ctx );
rahul_dahiya	0:fb8047b156bb	423
rahul_dahiya	0:fb8047b156bb	424	mbedtls_zeroize( tmp, sizeof( tmp ) );
rahul_dahiya	0:fb8047b156bb	425	mbedtls_zeroize( h_i, sizeof( h_i ) );
rahul_dahiya	0:fb8047b156bb	426
rahul_dahiya	0:fb8047b156bb	427	return( 0 );
rahul_dahiya	0:fb8047b156bb	428	}
rahul_dahiya	0:fb8047b156bb	429
rahul_dahiya	0:fb8047b156bb	430	#if defined(MBEDTLS_SHA256_C)
rahul_dahiya	0:fb8047b156bb	431	static int tls_prf_sha256( const unsigned char *secret, size_t slen,
rahul_dahiya	0:fb8047b156bb	432	const char *label,
rahul_dahiya	0:fb8047b156bb	433	const unsigned char *random, size_t rlen,
rahul_dahiya	0:fb8047b156bb	434	unsigned char *dstbuf, size_t dlen )
rahul_dahiya	0:fb8047b156bb	435	{
rahul_dahiya	0:fb8047b156bb	436	return( tls_prf_generic( MBEDTLS_MD_SHA256, secret, slen,
rahul_dahiya	0:fb8047b156bb	437	label, random, rlen, dstbuf, dlen ) );
rahul_dahiya	0:fb8047b156bb	438	}
rahul_dahiya	0:fb8047b156bb	439	#endif /* MBEDTLS_SHA256_C */
rahul_dahiya	0:fb8047b156bb	440
rahul_dahiya	0:fb8047b156bb	441	#if defined(MBEDTLS_SHA512_C)
rahul_dahiya	0:fb8047b156bb	442	static int tls_prf_sha384( const unsigned char *secret, size_t slen,
rahul_dahiya	0:fb8047b156bb	443	const char *label,
rahul_dahiya	0:fb8047b156bb	444	const unsigned char *random, size_t rlen,
rahul_dahiya	0:fb8047b156bb	445	unsigned char *dstbuf, size_t dlen )
rahul_dahiya	0:fb8047b156bb	446	{
rahul_dahiya	0:fb8047b156bb	447	return( tls_prf_generic( MBEDTLS_MD_SHA384, secret, slen,
rahul_dahiya	0:fb8047b156bb	448	label, random, rlen, dstbuf, dlen ) );
rahul_dahiya	0:fb8047b156bb	449	}
rahul_dahiya	0:fb8047b156bb	450	#endif /* MBEDTLS_SHA512_C */
rahul_dahiya	0:fb8047b156bb	451	#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
rahul_dahiya	0:fb8047b156bb	452
rahul_dahiya	0:fb8047b156bb	453	static void ssl_update_checksum_start( mbedtls_ssl_context , const unsigned char , size_t );
rahul_dahiya	0:fb8047b156bb	454
rahul_dahiya	0:fb8047b156bb	455	#if defined(MBEDTLS_SSL_PROTO_SSL3) \|\| defined(MBEDTLS_SSL_PROTO_TLS1) \|\| \
rahul_dahiya	0:fb8047b156bb	456	defined(MBEDTLS_SSL_PROTO_TLS1_1)
rahul_dahiya	0:fb8047b156bb	457	static void ssl_update_checksum_md5sha1( mbedtls_ssl_context , const unsigned char , size_t );
rahul_dahiya	0:fb8047b156bb	458	#endif
rahul_dahiya	0:fb8047b156bb	459
rahul_dahiya	0:fb8047b156bb	460	#if defined(MBEDTLS_SSL_PROTO_SSL3)
rahul_dahiya	0:fb8047b156bb	461	static void ssl_calc_verify_ssl( mbedtls_ssl_context , unsigned char );
rahul_dahiya	0:fb8047b156bb	462	static void ssl_calc_finished_ssl( mbedtls_ssl_context , unsigned char , int );
rahul_dahiya	0:fb8047b156bb	463	#endif
rahul_dahiya	0:fb8047b156bb	464
rahul_dahiya	0:fb8047b156bb	465	#if defined(MBEDTLS_SSL_PROTO_TLS1) \|\| defined(MBEDTLS_SSL_PROTO_TLS1_1)
rahul_dahiya	0:fb8047b156bb	466	static void ssl_calc_verify_tls( mbedtls_ssl_context , unsigned char );
rahul_dahiya	0:fb8047b156bb	467	static void ssl_calc_finished_tls( mbedtls_ssl_context , unsigned char , int );
rahul_dahiya	0:fb8047b156bb	468	#endif
rahul_dahiya	0:fb8047b156bb	469
rahul_dahiya	0:fb8047b156bb	470	#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
rahul_dahiya	0:fb8047b156bb	471	#if defined(MBEDTLS_SHA256_C)
rahul_dahiya	0:fb8047b156bb	472	static void ssl_update_checksum_sha256( mbedtls_ssl_context , const unsigned char , size_t );
rahul_dahiya	0:fb8047b156bb	473	static void ssl_calc_verify_tls_sha256( mbedtls_ssl_context ,unsigned char );
rahul_dahiya	0:fb8047b156bb	474	static void ssl_calc_finished_tls_sha256( mbedtls_ssl_context ,unsigned char , int );
rahul_dahiya	0:fb8047b156bb	475	#endif
rahul_dahiya	0:fb8047b156bb	476
rahul_dahiya	0:fb8047b156bb	477	#if defined(MBEDTLS_SHA512_C)
rahul_dahiya	0:fb8047b156bb	478	static void ssl_update_checksum_sha384( mbedtls_ssl_context , const unsigned char , size_t );
rahul_dahiya	0:fb8047b156bb	479	static void ssl_calc_verify_tls_sha384( mbedtls_ssl_context , unsigned char );
rahul_dahiya	0:fb8047b156bb	480	static void ssl_calc_finished_tls_sha384( mbedtls_ssl_context , unsigned char , int );
rahul_dahiya	0:fb8047b156bb	481	#endif
rahul_dahiya	0:fb8047b156bb	482	#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
rahul_dahiya	0:fb8047b156bb	483
rahul_dahiya	0:fb8047b156bb	484	int mbedtls_ssl_derive_keys( mbedtls_ssl_context *ssl )
rahul_dahiya	0:fb8047b156bb	485	{
rahul_dahiya	0:fb8047b156bb	486	int ret = 0;
rahul_dahiya	0:fb8047b156bb	487	unsigned char tmp[64];
rahul_dahiya	0:fb8047b156bb	488	unsigned char keyblk[256];
rahul_dahiya	0:fb8047b156bb	489	unsigned char *key1;
rahul_dahiya	0:fb8047b156bb	490	unsigned char *key2;
rahul_dahiya	0:fb8047b156bb	491	unsigned char *mac_enc;
rahul_dahiya	0:fb8047b156bb	492	unsigned char *mac_dec;
rahul_dahiya	0:fb8047b156bb	493	size_t iv_copy_len;
rahul_dahiya	0:fb8047b156bb	494	const mbedtls_cipher_info_t *cipher_info;
rahul_dahiya	0:fb8047b156bb	495	const mbedtls_md_info_t *md_info;
rahul_dahiya	0:fb8047b156bb	496
rahul_dahiya	0:fb8047b156bb	497	mbedtls_ssl_session *session = ssl->session_negotiate;
rahul_dahiya	0:fb8047b156bb	498	mbedtls_ssl_transform *transform = ssl->transform_negotiate;
rahul_dahiya	0:fb8047b156bb	499	mbedtls_ssl_handshake_params *handshake = ssl->handshake;
rahul_dahiya	0:fb8047b156bb	500
rahul_dahiya	0:fb8047b156bb	501	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> derive keys" ) );
rahul_dahiya	0:fb8047b156bb	502
rahul_dahiya	0:fb8047b156bb	503	cipher_info = mbedtls_cipher_info_from_type( transform->ciphersuite_info->cipher );
rahul_dahiya	0:fb8047b156bb	504	if( cipher_info == NULL )
rahul_dahiya	0:fb8047b156bb	505	{
rahul_dahiya	0:fb8047b156bb	506	MBEDTLS_SSL_DEBUG_MSG( 1, ( "cipher info for %d not found",
rahul_dahiya	0:fb8047b156bb	507	transform->ciphersuite_info->cipher ) );
rahul_dahiya	0:fb8047b156bb	508	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
rahul_dahiya	0:fb8047b156bb	509	}
rahul_dahiya	0:fb8047b156bb	510
rahul_dahiya	0:fb8047b156bb	511	md_info = mbedtls_md_info_from_type( transform->ciphersuite_info->mac );
rahul_dahiya	0:fb8047b156bb	512	if( md_info == NULL )
rahul_dahiya	0:fb8047b156bb	513	{
rahul_dahiya	0:fb8047b156bb	514	MBEDTLS_SSL_DEBUG_MSG( 1, ( "mbedtls_md info for %d not found",
rahul_dahiya	0:fb8047b156bb	515	transform->ciphersuite_info->mac ) );
rahul_dahiya	0:fb8047b156bb	516	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
rahul_dahiya	0:fb8047b156bb	517	}
rahul_dahiya	0:fb8047b156bb	518
rahul_dahiya	0:fb8047b156bb	519	/*
rahul_dahiya	0:fb8047b156bb	520	* Set appropriate PRF function and other SSL / TLS / TLS1.2 functions
rahul_dahiya	0:fb8047b156bb	521	*/
rahul_dahiya	0:fb8047b156bb	522	#if defined(MBEDTLS_SSL_PROTO_SSL3)
rahul_dahiya	0:fb8047b156bb	523	if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 )
rahul_dahiya	0:fb8047b156bb	524	{
rahul_dahiya	0:fb8047b156bb	525	handshake->tls_prf = ssl3_prf;
rahul_dahiya	0:fb8047b156bb	526	handshake->calc_verify = ssl_calc_verify_ssl;
rahul_dahiya	0:fb8047b156bb	527	handshake->calc_finished = ssl_calc_finished_ssl;
rahul_dahiya	0:fb8047b156bb	528	}
rahul_dahiya	0:fb8047b156bb	529	else
rahul_dahiya	0:fb8047b156bb	530	#endif
rahul_dahiya	0:fb8047b156bb	531	#if defined(MBEDTLS_SSL_PROTO_TLS1) \|\| defined(MBEDTLS_SSL_PROTO_TLS1_1)
rahul_dahiya	0:fb8047b156bb	532	if( ssl->minor_ver < MBEDTLS_SSL_MINOR_VERSION_3 )
rahul_dahiya	0:fb8047b156bb	533	{
rahul_dahiya	0:fb8047b156bb	534	handshake->tls_prf = tls1_prf;
rahul_dahiya	0:fb8047b156bb	535	handshake->calc_verify = ssl_calc_verify_tls;
rahul_dahiya	0:fb8047b156bb	536	handshake->calc_finished = ssl_calc_finished_tls;
rahul_dahiya	0:fb8047b156bb	537	}
rahul_dahiya	0:fb8047b156bb	538	else
rahul_dahiya	0:fb8047b156bb	539	#endif
rahul_dahiya	0:fb8047b156bb	540	#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
rahul_dahiya	0:fb8047b156bb	541	#if defined(MBEDTLS_SHA512_C)
rahul_dahiya	0:fb8047b156bb	542	if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_3 &&
rahul_dahiya	0:fb8047b156bb	543	transform->ciphersuite_info->mac == MBEDTLS_MD_SHA384 )
rahul_dahiya	0:fb8047b156bb	544	{
rahul_dahiya	0:fb8047b156bb	545	handshake->tls_prf = tls_prf_sha384;
rahul_dahiya	0:fb8047b156bb	546	handshake->calc_verify = ssl_calc_verify_tls_sha384;
rahul_dahiya	0:fb8047b156bb	547	handshake->calc_finished = ssl_calc_finished_tls_sha384;
rahul_dahiya	0:fb8047b156bb	548	}
rahul_dahiya	0:fb8047b156bb	549	else
rahul_dahiya	0:fb8047b156bb	550	#endif
rahul_dahiya	0:fb8047b156bb	551	#if defined(MBEDTLS_SHA256_C)
rahul_dahiya	0:fb8047b156bb	552	if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_3 )
rahul_dahiya	0:fb8047b156bb	553	{
rahul_dahiya	0:fb8047b156bb	554	handshake->tls_prf = tls_prf_sha256;
rahul_dahiya	0:fb8047b156bb	555	handshake->calc_verify = ssl_calc_verify_tls_sha256;
rahul_dahiya	0:fb8047b156bb	556	handshake->calc_finished = ssl_calc_finished_tls_sha256;
rahul_dahiya	0:fb8047b156bb	557	}
rahul_dahiya	0:fb8047b156bb	558	else
rahul_dahiya	0:fb8047b156bb	559	#endif
rahul_dahiya	0:fb8047b156bb	560	#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
rahul_dahiya	0:fb8047b156bb	561	{
rahul_dahiya	0:fb8047b156bb	562	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
rahul_dahiya	0:fb8047b156bb	563	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
rahul_dahiya	0:fb8047b156bb	564	}
rahul_dahiya	0:fb8047b156bb	565
rahul_dahiya	0:fb8047b156bb	566	/*
rahul_dahiya	0:fb8047b156bb	567	* SSLv3:
rahul_dahiya	0:fb8047b156bb	568	* master =
rahul_dahiya	0:fb8047b156bb	569	* MD5( premaster + SHA1( 'A' + premaster + randbytes ) ) +
rahul_dahiya	0:fb8047b156bb	570	* MD5( premaster + SHA1( 'BB' + premaster + randbytes ) ) +
rahul_dahiya	0:fb8047b156bb	571	* MD5( premaster + SHA1( 'CCC' + premaster + randbytes ) )
rahul_dahiya	0:fb8047b156bb	572	*
rahul_dahiya	0:fb8047b156bb	573	* TLSv1+:
rahul_dahiya	0:fb8047b156bb	574	* master = PRF( premaster, "master secret", randbytes )[0..47]
rahul_dahiya	0:fb8047b156bb	575	*/
rahul_dahiya	0:fb8047b156bb	576	if( handshake->resume == 0 )
rahul_dahiya	0:fb8047b156bb	577	{
rahul_dahiya	0:fb8047b156bb	578	MBEDTLS_SSL_DEBUG_BUF( 3, "premaster secret", handshake->premaster,
rahul_dahiya	0:fb8047b156bb	579	handshake->pmslen );
rahul_dahiya	0:fb8047b156bb	580
rahul_dahiya	0:fb8047b156bb	581	#if defined(MBEDTLS_SSL_EXTENDED_MASTER_SECRET)
rahul_dahiya	0:fb8047b156bb	582	if( ssl->handshake->extended_ms == MBEDTLS_SSL_EXTENDED_MS_ENABLED )
rahul_dahiya	0:fb8047b156bb	583	{
rahul_dahiya	0:fb8047b156bb	584	unsigned char session_hash[48];
rahul_dahiya	0:fb8047b156bb	585	size_t hash_len;
rahul_dahiya	0:fb8047b156bb	586
rahul_dahiya	0:fb8047b156bb	587	MBEDTLS_SSL_DEBUG_MSG( 3, ( "using extended master secret" ) );
rahul_dahiya	0:fb8047b156bb	588
rahul_dahiya	0:fb8047b156bb	589	ssl->handshake->calc_verify( ssl, session_hash );
rahul_dahiya	0:fb8047b156bb	590
rahul_dahiya	0:fb8047b156bb	591	#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
rahul_dahiya	0:fb8047b156bb	592	if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_3 )
rahul_dahiya	0:fb8047b156bb	593	{
rahul_dahiya	0:fb8047b156bb	594	#if defined(MBEDTLS_SHA512_C)
rahul_dahiya	0:fb8047b156bb	595	if( ssl->transform_negotiate->ciphersuite_info->mac ==
rahul_dahiya	0:fb8047b156bb	596	MBEDTLS_MD_SHA384 )
rahul_dahiya	0:fb8047b156bb	597	{
rahul_dahiya	0:fb8047b156bb	598	hash_len = 48;
rahul_dahiya	0:fb8047b156bb	599	}
rahul_dahiya	0:fb8047b156bb	600	else
rahul_dahiya	0:fb8047b156bb	601	#endif
rahul_dahiya	0:fb8047b156bb	602	hash_len = 32;
rahul_dahiya	0:fb8047b156bb	603	}
rahul_dahiya	0:fb8047b156bb	604	else
rahul_dahiya	0:fb8047b156bb	605	#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
rahul_dahiya	0:fb8047b156bb	606	hash_len = 36;
rahul_dahiya	0:fb8047b156bb	607
rahul_dahiya	0:fb8047b156bb	608	MBEDTLS_SSL_DEBUG_BUF( 3, "session hash", session_hash, hash_len );
rahul_dahiya	0:fb8047b156bb	609
rahul_dahiya	0:fb8047b156bb	610	ret = handshake->tls_prf( handshake->premaster, handshake->pmslen,
rahul_dahiya	0:fb8047b156bb	611	"extended master secret",
rahul_dahiya	0:fb8047b156bb	612	session_hash, hash_len,
rahul_dahiya	0:fb8047b156bb	613	session->master, 48 );
rahul_dahiya	0:fb8047b156bb	614	if( ret != 0 )
rahul_dahiya	0:fb8047b156bb	615	{
rahul_dahiya	0:fb8047b156bb	616	MBEDTLS_SSL_DEBUG_RET( 1, "prf", ret );
rahul_dahiya	0:fb8047b156bb	617	return( ret );
rahul_dahiya	0:fb8047b156bb	618	}
rahul_dahiya	0:fb8047b156bb	619
rahul_dahiya	0:fb8047b156bb	620	}
rahul_dahiya	0:fb8047b156bb	621	else
rahul_dahiya	0:fb8047b156bb	622	#endif
rahul_dahiya	0:fb8047b156bb	623	ret = handshake->tls_prf( handshake->premaster, handshake->pmslen,
rahul_dahiya	0:fb8047b156bb	624	"master secret",
rahul_dahiya	0:fb8047b156bb	625	handshake->randbytes, 64,
rahul_dahiya	0:fb8047b156bb	626	session->master, 48 );
rahul_dahiya	0:fb8047b156bb	627	if( ret != 0 )
rahul_dahiya	0:fb8047b156bb	628	{
rahul_dahiya	0:fb8047b156bb	629	MBEDTLS_SSL_DEBUG_RET( 1, "prf", ret );
rahul_dahiya	0:fb8047b156bb	630	return( ret );
rahul_dahiya	0:fb8047b156bb	631	}
rahul_dahiya	0:fb8047b156bb	632
rahul_dahiya	0:fb8047b156bb	633	mbedtls_zeroize( handshake->premaster, sizeof(handshake->premaster) );
rahul_dahiya	0:fb8047b156bb	634	}
rahul_dahiya	0:fb8047b156bb	635	else
rahul_dahiya	0:fb8047b156bb	636	MBEDTLS_SSL_DEBUG_MSG( 3, ( "no premaster (session resumed)" ) );
rahul_dahiya	0:fb8047b156bb	637
rahul_dahiya	0:fb8047b156bb	638	/*
rahul_dahiya	0:fb8047b156bb	639	* Swap the client and server random values.
rahul_dahiya	0:fb8047b156bb	640	*/
rahul_dahiya	0:fb8047b156bb	641	memcpy( tmp, handshake->randbytes, 64 );
rahul_dahiya	0:fb8047b156bb	642	memcpy( handshake->randbytes, tmp + 32, 32 );
rahul_dahiya	0:fb8047b156bb	643	memcpy( handshake->randbytes + 32, tmp, 32 );
rahul_dahiya	0:fb8047b156bb	644	mbedtls_zeroize( tmp, sizeof( tmp ) );
rahul_dahiya	0:fb8047b156bb	645
rahul_dahiya	0:fb8047b156bb	646	/*
rahul_dahiya	0:fb8047b156bb	647	* SSLv3:
rahul_dahiya	0:fb8047b156bb	648	* key block =
rahul_dahiya	0:fb8047b156bb	649	* MD5( master + SHA1( 'A' + master + randbytes ) ) +
rahul_dahiya	0:fb8047b156bb	650	* MD5( master + SHA1( 'BB' + master + randbytes ) ) +
rahul_dahiya	0:fb8047b156bb	651	* MD5( master + SHA1( 'CCC' + master + randbytes ) ) +
rahul_dahiya	0:fb8047b156bb	652	* MD5( master + SHA1( 'DDDD' + master + randbytes ) ) +
rahul_dahiya	0:fb8047b156bb	653	* ...
rahul_dahiya	0:fb8047b156bb	654	*
rahul_dahiya	0:fb8047b156bb	655	* TLSv1:
rahul_dahiya	0:fb8047b156bb	656	* key block = PRF( master, "key expansion", randbytes )
rahul_dahiya	0:fb8047b156bb	657	*/
rahul_dahiya	0:fb8047b156bb	658	ret = handshake->tls_prf( session->master, 48, "key expansion",
rahul_dahiya	0:fb8047b156bb	659	handshake->randbytes, 64, keyblk, 256 );
rahul_dahiya	0:fb8047b156bb	660	if( ret != 0 )
rahul_dahiya	0:fb8047b156bb	661	{
rahul_dahiya	0:fb8047b156bb	662	MBEDTLS_SSL_DEBUG_RET( 1, "prf", ret );
rahul_dahiya	0:fb8047b156bb	663	return( ret );
rahul_dahiya	0:fb8047b156bb	664	}
rahul_dahiya	0:fb8047b156bb	665
rahul_dahiya	0:fb8047b156bb	666	MBEDTLS_SSL_DEBUG_MSG( 3, ( "ciphersuite = %s",
rahul_dahiya	0:fb8047b156bb	667	mbedtls_ssl_get_ciphersuite_name( session->ciphersuite ) ) );
rahul_dahiya	0:fb8047b156bb	668	MBEDTLS_SSL_DEBUG_BUF( 3, "master secret", session->master, 48 );
rahul_dahiya	0:fb8047b156bb	669	MBEDTLS_SSL_DEBUG_BUF( 4, "random bytes", handshake->randbytes, 64 );
rahul_dahiya	0:fb8047b156bb	670	MBEDTLS_SSL_DEBUG_BUF( 4, "key block", keyblk, 256 );
rahul_dahiya	0:fb8047b156bb	671
rahul_dahiya	0:fb8047b156bb	672	mbedtls_zeroize( handshake->randbytes, sizeof( handshake->randbytes ) );
rahul_dahiya	0:fb8047b156bb	673
rahul_dahiya	0:fb8047b156bb	674	/*
rahul_dahiya	0:fb8047b156bb	675	* Determine the appropriate key, IV and MAC length.
rahul_dahiya	0:fb8047b156bb	676	*/
rahul_dahiya	0:fb8047b156bb	677
rahul_dahiya	0:fb8047b156bb	678	transform->keylen = cipher_info->key_bitlen / 8;
rahul_dahiya	0:fb8047b156bb	679
rahul_dahiya	0:fb8047b156bb	680	if( cipher_info->mode == MBEDTLS_MODE_GCM \|\|
rahul_dahiya	0:fb8047b156bb	681	cipher_info->mode == MBEDTLS_MODE_CCM )
rahul_dahiya	0:fb8047b156bb	682	{
rahul_dahiya	0:fb8047b156bb	683	transform->maclen = 0;
rahul_dahiya	0:fb8047b156bb	684
rahul_dahiya	0:fb8047b156bb	685	transform->ivlen = 12;
rahul_dahiya	0:fb8047b156bb	686	transform->fixed_ivlen = 4;
rahul_dahiya	0:fb8047b156bb	687
rahul_dahiya	0:fb8047b156bb	688	/* Minimum length is expicit IV + tag */
rahul_dahiya	0:fb8047b156bb	689	transform->minlen = transform->ivlen - transform->fixed_ivlen
rahul_dahiya	0:fb8047b156bb	690	+ ( transform->ciphersuite_info->flags &
rahul_dahiya	0:fb8047b156bb	691	MBEDTLS_CIPHERSUITE_SHORT_TAG ? 8 : 16 );
rahul_dahiya	0:fb8047b156bb	692	}
rahul_dahiya	0:fb8047b156bb	693	else
rahul_dahiya	0:fb8047b156bb	694	{
rahul_dahiya	0:fb8047b156bb	695	/* Initialize HMAC contexts */
rahul_dahiya	0:fb8047b156bb	696	if( ( ret = mbedtls_md_setup( &transform->md_ctx_enc, md_info, 1 ) ) != 0 \|\|
rahul_dahiya	0:fb8047b156bb	697	( ret = mbedtls_md_setup( &transform->md_ctx_dec, md_info, 1 ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	698	{
rahul_dahiya	0:fb8047b156bb	699	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_md_setup", ret );
rahul_dahiya	0:fb8047b156bb	700	return( ret );
rahul_dahiya	0:fb8047b156bb	701	}
rahul_dahiya	0:fb8047b156bb	702
rahul_dahiya	0:fb8047b156bb	703	/* Get MAC length */
rahul_dahiya	0:fb8047b156bb	704	transform->maclen = mbedtls_md_get_size( md_info );
rahul_dahiya	0:fb8047b156bb	705
rahul_dahiya	0:fb8047b156bb	706	#if defined(MBEDTLS_SSL_TRUNCATED_HMAC)
rahul_dahiya	0:fb8047b156bb	707	/*
rahul_dahiya	0:fb8047b156bb	708	* If HMAC is to be truncated, we shall keep the leftmost bytes,
rahul_dahiya	0:fb8047b156bb	709	* (rfc 6066 page 13 or rfc 2104 section 4),
rahul_dahiya	0:fb8047b156bb	710	* so we only need to adjust the length here.
rahul_dahiya	0:fb8047b156bb	711	*/
rahul_dahiya	0:fb8047b156bb	712	if( session->trunc_hmac == MBEDTLS_SSL_TRUNC_HMAC_ENABLED )
rahul_dahiya	0:fb8047b156bb	713	transform->maclen = MBEDTLS_SSL_TRUNCATED_HMAC_LEN;
rahul_dahiya	0:fb8047b156bb	714	#endif /* MBEDTLS_SSL_TRUNCATED_HMAC */
rahul_dahiya	0:fb8047b156bb	715
rahul_dahiya	0:fb8047b156bb	716	/* IV length */
rahul_dahiya	0:fb8047b156bb	717	transform->ivlen = cipher_info->iv_size;
rahul_dahiya	0:fb8047b156bb	718
rahul_dahiya	0:fb8047b156bb	719	/* Minimum length */
rahul_dahiya	0:fb8047b156bb	720	if( cipher_info->mode == MBEDTLS_MODE_STREAM )
rahul_dahiya	0:fb8047b156bb	721	transform->minlen = transform->maclen;
rahul_dahiya	0:fb8047b156bb	722	else
rahul_dahiya	0:fb8047b156bb	723	{
rahul_dahiya	0:fb8047b156bb	724	/*
rahul_dahiya	0:fb8047b156bb	725	* GenericBlockCipher:
rahul_dahiya	0:fb8047b156bb	726	* 1. if EtM is in use: one block plus MAC
rahul_dahiya	0:fb8047b156bb	727	* otherwise: * first multiple of blocklen greater than maclen
rahul_dahiya	0:fb8047b156bb	728	* 2. IV except for SSL3 and TLS 1.0
rahul_dahiya	0:fb8047b156bb	729	*/
rahul_dahiya	0:fb8047b156bb	730	#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
rahul_dahiya	0:fb8047b156bb	731	if( session->encrypt_then_mac == MBEDTLS_SSL_ETM_ENABLED )
rahul_dahiya	0:fb8047b156bb	732	{
rahul_dahiya	0:fb8047b156bb	733	transform->minlen = transform->maclen
rahul_dahiya	0:fb8047b156bb	734	+ cipher_info->block_size;
rahul_dahiya	0:fb8047b156bb	735	}
rahul_dahiya	0:fb8047b156bb	736	else
rahul_dahiya	0:fb8047b156bb	737	#endif
rahul_dahiya	0:fb8047b156bb	738	{
rahul_dahiya	0:fb8047b156bb	739	transform->minlen = transform->maclen
rahul_dahiya	0:fb8047b156bb	740	+ cipher_info->block_size
rahul_dahiya	0:fb8047b156bb	741	- transform->maclen % cipher_info->block_size;
rahul_dahiya	0:fb8047b156bb	742	}
rahul_dahiya	0:fb8047b156bb	743
rahul_dahiya	0:fb8047b156bb	744	#if defined(MBEDTLS_SSL_PROTO_SSL3) \|\| defined(MBEDTLS_SSL_PROTO_TLS1)
rahul_dahiya	0:fb8047b156bb	745	if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 \|\|
rahul_dahiya	0:fb8047b156bb	746	ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_1 )
rahul_dahiya	0:fb8047b156bb	747	; /* No need to adjust minlen */
rahul_dahiya	0:fb8047b156bb	748	else
rahul_dahiya	0:fb8047b156bb	749	#endif
rahul_dahiya	0:fb8047b156bb	750	#if defined(MBEDTLS_SSL_PROTO_TLS1_1) \|\| defined(MBEDTLS_SSL_PROTO_TLS1_2)
rahul_dahiya	0:fb8047b156bb	751	if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_2 \|\|
rahul_dahiya	0:fb8047b156bb	752	ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_3 )
rahul_dahiya	0:fb8047b156bb	753	{
rahul_dahiya	0:fb8047b156bb	754	transform->minlen += transform->ivlen;
rahul_dahiya	0:fb8047b156bb	755	}
rahul_dahiya	0:fb8047b156bb	756	else
rahul_dahiya	0:fb8047b156bb	757	#endif
rahul_dahiya	0:fb8047b156bb	758	{
rahul_dahiya	0:fb8047b156bb	759	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
rahul_dahiya	0:fb8047b156bb	760	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
rahul_dahiya	0:fb8047b156bb	761	}
rahul_dahiya	0:fb8047b156bb	762	}
rahul_dahiya	0:fb8047b156bb	763	}
rahul_dahiya	0:fb8047b156bb	764
rahul_dahiya	0:fb8047b156bb	765	MBEDTLS_SSL_DEBUG_MSG( 3, ( "keylen: %d, minlen: %d, ivlen: %d, maclen: %d",
rahul_dahiya	0:fb8047b156bb	766	transform->keylen, transform->minlen, transform->ivlen,
rahul_dahiya	0:fb8047b156bb	767	transform->maclen ) );
rahul_dahiya	0:fb8047b156bb	768
rahul_dahiya	0:fb8047b156bb	769	/*
rahul_dahiya	0:fb8047b156bb	770	* Finally setup the cipher contexts, IVs and MAC secrets.
rahul_dahiya	0:fb8047b156bb	771	*/
rahul_dahiya	0:fb8047b156bb	772	#if defined(MBEDTLS_SSL_CLI_C)
rahul_dahiya	0:fb8047b156bb	773	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_CLIENT )
rahul_dahiya	0:fb8047b156bb	774	{
rahul_dahiya	0:fb8047b156bb	775	key1 = keyblk + transform->maclen * 2;
rahul_dahiya	0:fb8047b156bb	776	key2 = keyblk + transform->maclen * 2 + transform->keylen;
rahul_dahiya	0:fb8047b156bb	777
rahul_dahiya	0:fb8047b156bb	778	mac_enc = keyblk;
rahul_dahiya	0:fb8047b156bb	779	mac_dec = keyblk + transform->maclen;
rahul_dahiya	0:fb8047b156bb	780
rahul_dahiya	0:fb8047b156bb	781	/*
rahul_dahiya	0:fb8047b156bb	782	* This is not used in TLS v1.1.
rahul_dahiya	0:fb8047b156bb	783	*/
rahul_dahiya	0:fb8047b156bb	784	iv_copy_len = ( transform->fixed_ivlen ) ?
rahul_dahiya	0:fb8047b156bb	785	transform->fixed_ivlen : transform->ivlen;
rahul_dahiya	0:fb8047b156bb	786	memcpy( transform->iv_enc, key2 + transform->keylen, iv_copy_len );
rahul_dahiya	0:fb8047b156bb	787	memcpy( transform->iv_dec, key2 + transform->keylen + iv_copy_len,
rahul_dahiya	0:fb8047b156bb	788	iv_copy_len );
rahul_dahiya	0:fb8047b156bb	789	}
rahul_dahiya	0:fb8047b156bb	790	else
rahul_dahiya	0:fb8047b156bb	791	#endif /* MBEDTLS_SSL_CLI_C */
rahul_dahiya	0:fb8047b156bb	792	#if defined(MBEDTLS_SSL_SRV_C)
rahul_dahiya	0:fb8047b156bb	793	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER )
rahul_dahiya	0:fb8047b156bb	794	{
rahul_dahiya	0:fb8047b156bb	795	key1 = keyblk + transform->maclen * 2 + transform->keylen;
rahul_dahiya	0:fb8047b156bb	796	key2 = keyblk + transform->maclen * 2;
rahul_dahiya	0:fb8047b156bb	797
rahul_dahiya	0:fb8047b156bb	798	mac_enc = keyblk + transform->maclen;
rahul_dahiya	0:fb8047b156bb	799	mac_dec = keyblk;
rahul_dahiya	0:fb8047b156bb	800
rahul_dahiya	0:fb8047b156bb	801	/*
rahul_dahiya	0:fb8047b156bb	802	* This is not used in TLS v1.1.
rahul_dahiya	0:fb8047b156bb	803	*/
rahul_dahiya	0:fb8047b156bb	804	iv_copy_len = ( transform->fixed_ivlen ) ?
rahul_dahiya	0:fb8047b156bb	805	transform->fixed_ivlen : transform->ivlen;
rahul_dahiya	0:fb8047b156bb	806	memcpy( transform->iv_dec, key1 + transform->keylen, iv_copy_len );
rahul_dahiya	0:fb8047b156bb	807	memcpy( transform->iv_enc, key1 + transform->keylen + iv_copy_len,
rahul_dahiya	0:fb8047b156bb	808	iv_copy_len );
rahul_dahiya	0:fb8047b156bb	809	}
rahul_dahiya	0:fb8047b156bb	810	else
rahul_dahiya	0:fb8047b156bb	811	#endif /* MBEDTLS_SSL_SRV_C */
rahul_dahiya	0:fb8047b156bb	812	{
rahul_dahiya	0:fb8047b156bb	813	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
rahul_dahiya	0:fb8047b156bb	814	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
rahul_dahiya	0:fb8047b156bb	815	}
rahul_dahiya	0:fb8047b156bb	816
rahul_dahiya	0:fb8047b156bb	817	#if defined(MBEDTLS_SSL_PROTO_SSL3)
rahul_dahiya	0:fb8047b156bb	818	if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 )
rahul_dahiya	0:fb8047b156bb	819	{
rahul_dahiya	0:fb8047b156bb	820	if( transform->maclen > sizeof transform->mac_enc )
rahul_dahiya	0:fb8047b156bb	821	{
rahul_dahiya	0:fb8047b156bb	822	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
rahul_dahiya	0:fb8047b156bb	823	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
rahul_dahiya	0:fb8047b156bb	824	}
rahul_dahiya	0:fb8047b156bb	825
rahul_dahiya	0:fb8047b156bb	826	memcpy( transform->mac_enc, mac_enc, transform->maclen );
rahul_dahiya	0:fb8047b156bb	827	memcpy( transform->mac_dec, mac_dec, transform->maclen );
rahul_dahiya	0:fb8047b156bb	828	}
rahul_dahiya	0:fb8047b156bb	829	else
rahul_dahiya	0:fb8047b156bb	830	#endif /* MBEDTLS_SSL_PROTO_SSL3 */
rahul_dahiya	0:fb8047b156bb	831	#if defined(MBEDTLS_SSL_PROTO_TLS1) \|\| defined(MBEDTLS_SSL_PROTO_TLS1_1) \|\| \
rahul_dahiya	0:fb8047b156bb	832	defined(MBEDTLS_SSL_PROTO_TLS1_2)
rahul_dahiya	0:fb8047b156bb	833	if( ssl->minor_ver >= MBEDTLS_SSL_MINOR_VERSION_1 )
rahul_dahiya	0:fb8047b156bb	834	{
rahul_dahiya	0:fb8047b156bb	835	mbedtls_md_hmac_starts( &transform->md_ctx_enc, mac_enc, transform->maclen );
rahul_dahiya	0:fb8047b156bb	836	mbedtls_md_hmac_starts( &transform->md_ctx_dec, mac_dec, transform->maclen );
rahul_dahiya	0:fb8047b156bb	837	}
rahul_dahiya	0:fb8047b156bb	838	else
rahul_dahiya	0:fb8047b156bb	839	#endif
rahul_dahiya	0:fb8047b156bb	840	{
rahul_dahiya	0:fb8047b156bb	841	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
rahul_dahiya	0:fb8047b156bb	842	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
rahul_dahiya	0:fb8047b156bb	843	}
rahul_dahiya	0:fb8047b156bb	844
rahul_dahiya	0:fb8047b156bb	845	#if defined(MBEDTLS_SSL_HW_RECORD_ACCEL)
rahul_dahiya	0:fb8047b156bb	846	if( mbedtls_ssl_hw_record_init != NULL )
rahul_dahiya	0:fb8047b156bb	847	{
rahul_dahiya	0:fb8047b156bb	848	int ret = 0;
rahul_dahiya	0:fb8047b156bb	849
rahul_dahiya	0:fb8047b156bb	850	MBEDTLS_SSL_DEBUG_MSG( 2, ( "going for mbedtls_ssl_hw_record_init()" ) );
rahul_dahiya	0:fb8047b156bb	851
rahul_dahiya	0:fb8047b156bb	852	if( ( ret = mbedtls_ssl_hw_record_init( ssl, key1, key2, transform->keylen,
rahul_dahiya	0:fb8047b156bb	853	transform->iv_enc, transform->iv_dec,
rahul_dahiya	0:fb8047b156bb	854	iv_copy_len,
rahul_dahiya	0:fb8047b156bb	855	mac_enc, mac_dec,
rahul_dahiya	0:fb8047b156bb	856	transform->maclen ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	857	{
rahul_dahiya	0:fb8047b156bb	858	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_hw_record_init", ret );
rahul_dahiya	0:fb8047b156bb	859	return( MBEDTLS_ERR_SSL_HW_ACCEL_FAILED );
rahul_dahiya	0:fb8047b156bb	860	}
rahul_dahiya	0:fb8047b156bb	861	}
rahul_dahiya	0:fb8047b156bb	862	#endif /* MBEDTLS_SSL_HW_RECORD_ACCEL */
rahul_dahiya	0:fb8047b156bb	863
rahul_dahiya	0:fb8047b156bb	864	#if defined(MBEDTLS_SSL_EXPORT_KEYS)
rahul_dahiya	0:fb8047b156bb	865	if( ssl->conf->f_export_keys != NULL )
rahul_dahiya	0:fb8047b156bb	866	{
rahul_dahiya	0:fb8047b156bb	867	ssl->conf->f_export_keys( ssl->conf->p_export_keys,
rahul_dahiya	0:fb8047b156bb	868	session->master, keyblk,
rahul_dahiya	0:fb8047b156bb	869	transform->maclen, transform->keylen,
rahul_dahiya	0:fb8047b156bb	870	iv_copy_len );
rahul_dahiya	0:fb8047b156bb	871	}
rahul_dahiya	0:fb8047b156bb	872	#endif
rahul_dahiya	0:fb8047b156bb	873
rahul_dahiya	0:fb8047b156bb	874	if( ( ret = mbedtls_cipher_setup( &transform->cipher_ctx_enc,
rahul_dahiya	0:fb8047b156bb	875	cipher_info ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	876	{
rahul_dahiya	0:fb8047b156bb	877	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_cipher_setup", ret );
rahul_dahiya	0:fb8047b156bb	878	return( ret );
rahul_dahiya	0:fb8047b156bb	879	}
rahul_dahiya	0:fb8047b156bb	880
rahul_dahiya	0:fb8047b156bb	881	if( ( ret = mbedtls_cipher_setup( &transform->cipher_ctx_dec,
rahul_dahiya	0:fb8047b156bb	882	cipher_info ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	883	{
rahul_dahiya	0:fb8047b156bb	884	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_cipher_setup", ret );
rahul_dahiya	0:fb8047b156bb	885	return( ret );
rahul_dahiya	0:fb8047b156bb	886	}
rahul_dahiya	0:fb8047b156bb	887
rahul_dahiya	0:fb8047b156bb	888	if( ( ret = mbedtls_cipher_setkey( &transform->cipher_ctx_enc, key1,
rahul_dahiya	0:fb8047b156bb	889	cipher_info->key_bitlen,
rahul_dahiya	0:fb8047b156bb	890	MBEDTLS_ENCRYPT ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	891	{
rahul_dahiya	0:fb8047b156bb	892	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_cipher_setkey", ret );
rahul_dahiya	0:fb8047b156bb	893	return( ret );
rahul_dahiya	0:fb8047b156bb	894	}
rahul_dahiya	0:fb8047b156bb	895
rahul_dahiya	0:fb8047b156bb	896	if( ( ret = mbedtls_cipher_setkey( &transform->cipher_ctx_dec, key2,
rahul_dahiya	0:fb8047b156bb	897	cipher_info->key_bitlen,
rahul_dahiya	0:fb8047b156bb	898	MBEDTLS_DECRYPT ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	899	{
rahul_dahiya	0:fb8047b156bb	900	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_cipher_setkey", ret );
rahul_dahiya	0:fb8047b156bb	901	return( ret );
rahul_dahiya	0:fb8047b156bb	902	}
rahul_dahiya	0:fb8047b156bb	903
rahul_dahiya	0:fb8047b156bb	904	#if defined(MBEDTLS_CIPHER_MODE_CBC)
rahul_dahiya	0:fb8047b156bb	905	if( cipher_info->mode == MBEDTLS_MODE_CBC )
rahul_dahiya	0:fb8047b156bb	906	{
rahul_dahiya	0:fb8047b156bb	907	if( ( ret = mbedtls_cipher_set_padding_mode( &transform->cipher_ctx_enc,
rahul_dahiya	0:fb8047b156bb	908	MBEDTLS_PADDING_NONE ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	909	{
rahul_dahiya	0:fb8047b156bb	910	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_cipher_set_padding_mode", ret );
rahul_dahiya	0:fb8047b156bb	911	return( ret );
rahul_dahiya	0:fb8047b156bb	912	}
rahul_dahiya	0:fb8047b156bb	913
rahul_dahiya	0:fb8047b156bb	914	if( ( ret = mbedtls_cipher_set_padding_mode( &transform->cipher_ctx_dec,
rahul_dahiya	0:fb8047b156bb	915	MBEDTLS_PADDING_NONE ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	916	{
rahul_dahiya	0:fb8047b156bb	917	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_cipher_set_padding_mode", ret );
rahul_dahiya	0:fb8047b156bb	918	return( ret );
rahul_dahiya	0:fb8047b156bb	919	}
rahul_dahiya	0:fb8047b156bb	920	}
rahul_dahiya	0:fb8047b156bb	921	#endif /* MBEDTLS_CIPHER_MODE_CBC */
rahul_dahiya	0:fb8047b156bb	922
rahul_dahiya	0:fb8047b156bb	923	mbedtls_zeroize( keyblk, sizeof( keyblk ) );
rahul_dahiya	0:fb8047b156bb	924
rahul_dahiya	0:fb8047b156bb	925	#if defined(MBEDTLS_ZLIB_SUPPORT)
rahul_dahiya	0:fb8047b156bb	926	// Initialize compression
rahul_dahiya	0:fb8047b156bb	927	//
rahul_dahiya	0:fb8047b156bb	928	if( session->compression == MBEDTLS_SSL_COMPRESS_DEFLATE )
rahul_dahiya	0:fb8047b156bb	929	{
rahul_dahiya	0:fb8047b156bb	930	if( ssl->compress_buf == NULL )
rahul_dahiya	0:fb8047b156bb	931	{
rahul_dahiya	0:fb8047b156bb	932	MBEDTLS_SSL_DEBUG_MSG( 3, ( "Allocating compression buffer" ) );
rahul_dahiya	0:fb8047b156bb	933	ssl->compress_buf = mbedtls_calloc( 1, MBEDTLS_SSL_BUFFER_LEN );
rahul_dahiya	0:fb8047b156bb	934	if( ssl->compress_buf == NULL )
rahul_dahiya	0:fb8047b156bb	935	{
rahul_dahiya	0:fb8047b156bb	936	MBEDTLS_SSL_DEBUG_MSG( 1, ( "alloc(%d bytes) failed",
rahul_dahiya	0:fb8047b156bb	937	MBEDTLS_SSL_BUFFER_LEN ) );
rahul_dahiya	0:fb8047b156bb	938	return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
rahul_dahiya	0:fb8047b156bb	939	}
rahul_dahiya	0:fb8047b156bb	940	}
rahul_dahiya	0:fb8047b156bb	941
rahul_dahiya	0:fb8047b156bb	942	MBEDTLS_SSL_DEBUG_MSG( 3, ( "Initializing zlib states" ) );
rahul_dahiya	0:fb8047b156bb	943
rahul_dahiya	0:fb8047b156bb	944	memset( &transform->ctx_deflate, 0, sizeof( transform->ctx_deflate ) );
rahul_dahiya	0:fb8047b156bb	945	memset( &transform->ctx_inflate, 0, sizeof( transform->ctx_inflate ) );
rahul_dahiya	0:fb8047b156bb	946
rahul_dahiya	0:fb8047b156bb	947	if( deflateInit( &transform->ctx_deflate,
rahul_dahiya	0:fb8047b156bb	948	Z_DEFAULT_COMPRESSION ) != Z_OK \|\|
rahul_dahiya	0:fb8047b156bb	949	inflateInit( &transform->ctx_inflate ) != Z_OK )
rahul_dahiya	0:fb8047b156bb	950	{
rahul_dahiya	0:fb8047b156bb	951	MBEDTLS_SSL_DEBUG_MSG( 1, ( "Failed to initialize compression" ) );
rahul_dahiya	0:fb8047b156bb	952	return( MBEDTLS_ERR_SSL_COMPRESSION_FAILED );
rahul_dahiya	0:fb8047b156bb	953	}
rahul_dahiya	0:fb8047b156bb	954	}
rahul_dahiya	0:fb8047b156bb	955	#endif /* MBEDTLS_ZLIB_SUPPORT */
rahul_dahiya	0:fb8047b156bb	956
rahul_dahiya	0:fb8047b156bb	957	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= derive keys" ) );
rahul_dahiya	0:fb8047b156bb	958
rahul_dahiya	0:fb8047b156bb	959	return( 0 );
rahul_dahiya	0:fb8047b156bb	960	}
rahul_dahiya	0:fb8047b156bb	961
rahul_dahiya	0:fb8047b156bb	962	#if defined(MBEDTLS_SSL_PROTO_SSL3)
rahul_dahiya	0:fb8047b156bb	963	void ssl_calc_verify_ssl( mbedtls_ssl_context *ssl, unsigned char hash[36] )
rahul_dahiya	0:fb8047b156bb	964	{
rahul_dahiya	0:fb8047b156bb	965	mbedtls_md5_context md5;
rahul_dahiya	0:fb8047b156bb	966	mbedtls_sha1_context sha1;
rahul_dahiya	0:fb8047b156bb	967	unsigned char pad_1[48];
rahul_dahiya	0:fb8047b156bb	968	unsigned char pad_2[48];
rahul_dahiya	0:fb8047b156bb	969
rahul_dahiya	0:fb8047b156bb	970	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> calc verify ssl" ) );
rahul_dahiya	0:fb8047b156bb	971
rahul_dahiya	0:fb8047b156bb	972	mbedtls_md5_init( &md5 );
rahul_dahiya	0:fb8047b156bb	973	mbedtls_sha1_init( &sha1 );
rahul_dahiya	0:fb8047b156bb	974
rahul_dahiya	0:fb8047b156bb	975	mbedtls_md5_clone( &md5, &ssl->handshake->fin_md5 );
rahul_dahiya	0:fb8047b156bb	976	mbedtls_sha1_clone( &sha1, &ssl->handshake->fin_sha1 );
rahul_dahiya	0:fb8047b156bb	977
rahul_dahiya	0:fb8047b156bb	978	memset( pad_1, 0x36, 48 );
rahul_dahiya	0:fb8047b156bb	979	memset( pad_2, 0x5C, 48 );
rahul_dahiya	0:fb8047b156bb	980
rahul_dahiya	0:fb8047b156bb	981	mbedtls_md5_update( &md5, ssl->session_negotiate->master, 48 );
rahul_dahiya	0:fb8047b156bb	982	mbedtls_md5_update( &md5, pad_1, 48 );
rahul_dahiya	0:fb8047b156bb	983	mbedtls_md5_finish( &md5, hash );
rahul_dahiya	0:fb8047b156bb	984
rahul_dahiya	0:fb8047b156bb	985	mbedtls_md5_starts( &md5 );
rahul_dahiya	0:fb8047b156bb	986	mbedtls_md5_update( &md5, ssl->session_negotiate->master, 48 );
rahul_dahiya	0:fb8047b156bb	987	mbedtls_md5_update( &md5, pad_2, 48 );
rahul_dahiya	0:fb8047b156bb	988	mbedtls_md5_update( &md5, hash, 16 );
rahul_dahiya	0:fb8047b156bb	989	mbedtls_md5_finish( &md5, hash );
rahul_dahiya	0:fb8047b156bb	990
rahul_dahiya	0:fb8047b156bb	991	mbedtls_sha1_update( &sha1, ssl->session_negotiate->master, 48 );
rahul_dahiya	0:fb8047b156bb	992	mbedtls_sha1_update( &sha1, pad_1, 40 );
rahul_dahiya	0:fb8047b156bb	993	mbedtls_sha1_finish( &sha1, hash + 16 );
rahul_dahiya	0:fb8047b156bb	994
rahul_dahiya	0:fb8047b156bb	995	mbedtls_sha1_starts( &sha1 );
rahul_dahiya	0:fb8047b156bb	996	mbedtls_sha1_update( &sha1, ssl->session_negotiate->master, 48 );
rahul_dahiya	0:fb8047b156bb	997	mbedtls_sha1_update( &sha1, pad_2, 40 );
rahul_dahiya	0:fb8047b156bb	998	mbedtls_sha1_update( &sha1, hash + 16, 20 );
rahul_dahiya	0:fb8047b156bb	999	mbedtls_sha1_finish( &sha1, hash + 16 );
rahul_dahiya	0:fb8047b156bb	1000
rahul_dahiya	0:fb8047b156bb	1001	MBEDTLS_SSL_DEBUG_BUF( 3, "calculated verify result", hash, 36 );
rahul_dahiya	0:fb8047b156bb	1002	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= calc verify" ) );
rahul_dahiya	0:fb8047b156bb	1003
rahul_dahiya	0:fb8047b156bb	1004	mbedtls_md5_free( &md5 );
rahul_dahiya	0:fb8047b156bb	1005	mbedtls_sha1_free( &sha1 );
rahul_dahiya	0:fb8047b156bb	1006
rahul_dahiya	0:fb8047b156bb	1007	return;
rahul_dahiya	0:fb8047b156bb	1008	}
rahul_dahiya	0:fb8047b156bb	1009	#endif /* MBEDTLS_SSL_PROTO_SSL3 */
rahul_dahiya	0:fb8047b156bb	1010
rahul_dahiya	0:fb8047b156bb	1011	#if defined(MBEDTLS_SSL_PROTO_TLS1) \|\| defined(MBEDTLS_SSL_PROTO_TLS1_1)
rahul_dahiya	0:fb8047b156bb	1012	void ssl_calc_verify_tls( mbedtls_ssl_context *ssl, unsigned char hash[36] )
rahul_dahiya	0:fb8047b156bb	1013	{
rahul_dahiya	0:fb8047b156bb	1014	mbedtls_md5_context md5;
rahul_dahiya	0:fb8047b156bb	1015	mbedtls_sha1_context sha1;
rahul_dahiya	0:fb8047b156bb	1016
rahul_dahiya	0:fb8047b156bb	1017	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> calc verify tls" ) );
rahul_dahiya	0:fb8047b156bb	1018
rahul_dahiya	0:fb8047b156bb	1019	mbedtls_md5_init( &md5 );
rahul_dahiya	0:fb8047b156bb	1020	mbedtls_sha1_init( &sha1 );
rahul_dahiya	0:fb8047b156bb	1021
rahul_dahiya	0:fb8047b156bb	1022	mbedtls_md5_clone( &md5, &ssl->handshake->fin_md5 );
rahul_dahiya	0:fb8047b156bb	1023	mbedtls_sha1_clone( &sha1, &ssl->handshake->fin_sha1 );
rahul_dahiya	0:fb8047b156bb	1024
rahul_dahiya	0:fb8047b156bb	1025	mbedtls_md5_finish( &md5, hash );
rahul_dahiya	0:fb8047b156bb	1026	mbedtls_sha1_finish( &sha1, hash + 16 );
rahul_dahiya	0:fb8047b156bb	1027
rahul_dahiya	0:fb8047b156bb	1028	MBEDTLS_SSL_DEBUG_BUF( 3, "calculated verify result", hash, 36 );
rahul_dahiya	0:fb8047b156bb	1029	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= calc verify" ) );
rahul_dahiya	0:fb8047b156bb	1030
rahul_dahiya	0:fb8047b156bb	1031	mbedtls_md5_free( &md5 );
rahul_dahiya	0:fb8047b156bb	1032	mbedtls_sha1_free( &sha1 );
rahul_dahiya	0:fb8047b156bb	1033
rahul_dahiya	0:fb8047b156bb	1034	return;
rahul_dahiya	0:fb8047b156bb	1035	}
rahul_dahiya	0:fb8047b156bb	1036	#endif /* MBEDTLS_SSL_PROTO_TLS1 \|\| MBEDTLS_SSL_PROTO_TLS1_1 */
rahul_dahiya	0:fb8047b156bb	1037
rahul_dahiya	0:fb8047b156bb	1038	#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
rahul_dahiya	0:fb8047b156bb	1039	#if defined(MBEDTLS_SHA256_C)
rahul_dahiya	0:fb8047b156bb	1040	void ssl_calc_verify_tls_sha256( mbedtls_ssl_context *ssl, unsigned char hash[32] )
rahul_dahiya	0:fb8047b156bb	1041	{
rahul_dahiya	0:fb8047b156bb	1042	mbedtls_sha256_context sha256;
rahul_dahiya	0:fb8047b156bb	1043
rahul_dahiya	0:fb8047b156bb	1044	mbedtls_sha256_init( &sha256 );
rahul_dahiya	0:fb8047b156bb	1045
rahul_dahiya	0:fb8047b156bb	1046	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> calc verify sha256" ) );
rahul_dahiya	0:fb8047b156bb	1047
rahul_dahiya	0:fb8047b156bb	1048	mbedtls_sha256_clone( &sha256, &ssl->handshake->fin_sha256 );
rahul_dahiya	0:fb8047b156bb	1049	mbedtls_sha256_finish( &sha256, hash );
rahul_dahiya	0:fb8047b156bb	1050
rahul_dahiya	0:fb8047b156bb	1051	MBEDTLS_SSL_DEBUG_BUF( 3, "calculated verify result", hash, 32 );
rahul_dahiya	0:fb8047b156bb	1052	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= calc verify" ) );
rahul_dahiya	0:fb8047b156bb	1053
rahul_dahiya	0:fb8047b156bb	1054	mbedtls_sha256_free( &sha256 );
rahul_dahiya	0:fb8047b156bb	1055
rahul_dahiya	0:fb8047b156bb	1056	return;
rahul_dahiya	0:fb8047b156bb	1057	}
rahul_dahiya	0:fb8047b156bb	1058	#endif /* MBEDTLS_SHA256_C */
rahul_dahiya	0:fb8047b156bb	1059
rahul_dahiya	0:fb8047b156bb	1060	#if defined(MBEDTLS_SHA512_C)
rahul_dahiya	0:fb8047b156bb	1061	void ssl_calc_verify_tls_sha384( mbedtls_ssl_context *ssl, unsigned char hash[48] )
rahul_dahiya	0:fb8047b156bb	1062	{
rahul_dahiya	0:fb8047b156bb	1063	mbedtls_sha512_context sha512;
rahul_dahiya	0:fb8047b156bb	1064
rahul_dahiya	0:fb8047b156bb	1065	mbedtls_sha512_init( &sha512 );
rahul_dahiya	0:fb8047b156bb	1066
rahul_dahiya	0:fb8047b156bb	1067	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> calc verify sha384" ) );
rahul_dahiya	0:fb8047b156bb	1068
rahul_dahiya	0:fb8047b156bb	1069	mbedtls_sha512_clone( &sha512, &ssl->handshake->fin_sha512 );
rahul_dahiya	0:fb8047b156bb	1070	mbedtls_sha512_finish( &sha512, hash );
rahul_dahiya	0:fb8047b156bb	1071
rahul_dahiya	0:fb8047b156bb	1072	MBEDTLS_SSL_DEBUG_BUF( 3, "calculated verify result", hash, 48 );
rahul_dahiya	0:fb8047b156bb	1073	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= calc verify" ) );
rahul_dahiya	0:fb8047b156bb	1074
rahul_dahiya	0:fb8047b156bb	1075	mbedtls_sha512_free( &sha512 );
rahul_dahiya	0:fb8047b156bb	1076
rahul_dahiya	0:fb8047b156bb	1077	return;
rahul_dahiya	0:fb8047b156bb	1078	}
rahul_dahiya	0:fb8047b156bb	1079	#endif /* MBEDTLS_SHA512_C */
rahul_dahiya	0:fb8047b156bb	1080	#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
rahul_dahiya	0:fb8047b156bb	1081
rahul_dahiya	0:fb8047b156bb	1082	#if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
rahul_dahiya	0:fb8047b156bb	1083	int mbedtls_ssl_psk_derive_premaster( mbedtls_ssl_context *ssl, mbedtls_key_exchange_type_t key_ex )
rahul_dahiya	0:fb8047b156bb	1084	{
rahul_dahiya	0:fb8047b156bb	1085	unsigned char *p = ssl->handshake->premaster;
rahul_dahiya	0:fb8047b156bb	1086	unsigned char *end = p + sizeof( ssl->handshake->premaster );
rahul_dahiya	0:fb8047b156bb	1087	const unsigned char *psk = ssl->conf->psk;
rahul_dahiya	0:fb8047b156bb	1088	size_t psk_len = ssl->conf->psk_len;
rahul_dahiya	0:fb8047b156bb	1089
rahul_dahiya	0:fb8047b156bb	1090	/* If the psk callback was called, use its result */
rahul_dahiya	0:fb8047b156bb	1091	if( ssl->handshake->psk != NULL )
rahul_dahiya	0:fb8047b156bb	1092	{
rahul_dahiya	0:fb8047b156bb	1093	psk = ssl->handshake->psk;
rahul_dahiya	0:fb8047b156bb	1094	psk_len = ssl->handshake->psk_len;
rahul_dahiya	0:fb8047b156bb	1095	}
rahul_dahiya	0:fb8047b156bb	1096
rahul_dahiya	0:fb8047b156bb	1097	/*
rahul_dahiya	0:fb8047b156bb	1098	* PMS = struct {
rahul_dahiya	0:fb8047b156bb	1099	* opaque other_secret<0..2^16-1>;
rahul_dahiya	0:fb8047b156bb	1100	* opaque psk<0..2^16-1>;
rahul_dahiya	0:fb8047b156bb	1101	* };
rahul_dahiya	0:fb8047b156bb	1102	* with "other_secret" depending on the particular key exchange
rahul_dahiya	0:fb8047b156bb	1103	*/
rahul_dahiya	0:fb8047b156bb	1104	#if defined(MBEDTLS_KEY_EXCHANGE_PSK_ENABLED)
rahul_dahiya	0:fb8047b156bb	1105	if( key_ex == MBEDTLS_KEY_EXCHANGE_PSK )
rahul_dahiya	0:fb8047b156bb	1106	{
rahul_dahiya	0:fb8047b156bb	1107	if( end - p < 2 )
rahul_dahiya	0:fb8047b156bb	1108	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
rahul_dahiya	0:fb8047b156bb	1109
rahul_dahiya	0:fb8047b156bb	1110	*(p++) = (unsigned char)( psk_len >> 8 );
rahul_dahiya	0:fb8047b156bb	1111	*(p++) = (unsigned char)( psk_len );
rahul_dahiya	0:fb8047b156bb	1112
rahul_dahiya	0:fb8047b156bb	1113	if( end < p \|\| (size_t)( end - p ) < psk_len )
rahul_dahiya	0:fb8047b156bb	1114	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
rahul_dahiya	0:fb8047b156bb	1115
rahul_dahiya	0:fb8047b156bb	1116	memset( p, 0, psk_len );
rahul_dahiya	0:fb8047b156bb	1117	p += psk_len;
rahul_dahiya	0:fb8047b156bb	1118	}
rahul_dahiya	0:fb8047b156bb	1119	else
rahul_dahiya	0:fb8047b156bb	1120	#endif /* MBEDTLS_KEY_EXCHANGE_PSK_ENABLED */
rahul_dahiya	0:fb8047b156bb	1121	#if defined(MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED)
rahul_dahiya	0:fb8047b156bb	1122	if( key_ex == MBEDTLS_KEY_EXCHANGE_RSA_PSK )
rahul_dahiya	0:fb8047b156bb	1123	{
rahul_dahiya	0:fb8047b156bb	1124	/*
rahul_dahiya	0:fb8047b156bb	1125	* other_secret already set by the ClientKeyExchange message,
rahul_dahiya	0:fb8047b156bb	1126	* and is 48 bytes long
rahul_dahiya	0:fb8047b156bb	1127	*/
rahul_dahiya	0:fb8047b156bb	1128	*p++ = 0;
rahul_dahiya	0:fb8047b156bb	1129	*p++ = 48;
rahul_dahiya	0:fb8047b156bb	1130	p += 48;
rahul_dahiya	0:fb8047b156bb	1131	}
rahul_dahiya	0:fb8047b156bb	1132	else
rahul_dahiya	0:fb8047b156bb	1133	#endif /* MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED */
rahul_dahiya	0:fb8047b156bb	1134	#if defined(MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED)
rahul_dahiya	0:fb8047b156bb	1135	if( key_ex == MBEDTLS_KEY_EXCHANGE_DHE_PSK )
rahul_dahiya	0:fb8047b156bb	1136	{
rahul_dahiya	0:fb8047b156bb	1137	int ret;
rahul_dahiya	0:fb8047b156bb	1138	size_t len;
rahul_dahiya	0:fb8047b156bb	1139
rahul_dahiya	0:fb8047b156bb	1140	/* Write length only when we know the actual value */
rahul_dahiya	0:fb8047b156bb	1141	if( ( ret = mbedtls_dhm_calc_secret( &ssl->handshake->dhm_ctx,
rahul_dahiya	0:fb8047b156bb	1142	p + 2, end - ( p + 2 ), &len,
rahul_dahiya	0:fb8047b156bb	1143	ssl->conf->f_rng, ssl->conf->p_rng ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	1144	{
rahul_dahiya	0:fb8047b156bb	1145	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_dhm_calc_secret", ret );
rahul_dahiya	0:fb8047b156bb	1146	return( ret );
rahul_dahiya	0:fb8047b156bb	1147	}
rahul_dahiya	0:fb8047b156bb	1148	*(p++) = (unsigned char)( len >> 8 );
rahul_dahiya	0:fb8047b156bb	1149	*(p++) = (unsigned char)( len );
rahul_dahiya	0:fb8047b156bb	1150	p += len;
rahul_dahiya	0:fb8047b156bb	1151
rahul_dahiya	0:fb8047b156bb	1152	MBEDTLS_SSL_DEBUG_MPI( 3, "DHM: K ", &ssl->handshake->dhm_ctx.K );
rahul_dahiya	0:fb8047b156bb	1153	}
rahul_dahiya	0:fb8047b156bb	1154	else
rahul_dahiya	0:fb8047b156bb	1155	#endif /* MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED */
rahul_dahiya	0:fb8047b156bb	1156	#if defined(MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED)
rahul_dahiya	0:fb8047b156bb	1157	if( key_ex == MBEDTLS_KEY_EXCHANGE_ECDHE_PSK )
rahul_dahiya	0:fb8047b156bb	1158	{
rahul_dahiya	0:fb8047b156bb	1159	int ret;
rahul_dahiya	0:fb8047b156bb	1160	size_t zlen;
rahul_dahiya	0:fb8047b156bb	1161
rahul_dahiya	0:fb8047b156bb	1162	if( ( ret = mbedtls_ecdh_calc_secret( &ssl->handshake->ecdh_ctx, &zlen,
rahul_dahiya	0:fb8047b156bb	1163	p + 2, end - ( p + 2 ),
rahul_dahiya	0:fb8047b156bb	1164	ssl->conf->f_rng, ssl->conf->p_rng ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	1165	{
rahul_dahiya	0:fb8047b156bb	1166	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ecdh_calc_secret", ret );
rahul_dahiya	0:fb8047b156bb	1167	return( ret );
rahul_dahiya	0:fb8047b156bb	1168	}
rahul_dahiya	0:fb8047b156bb	1169
rahul_dahiya	0:fb8047b156bb	1170	*(p++) = (unsigned char)( zlen >> 8 );
rahul_dahiya	0:fb8047b156bb	1171	*(p++) = (unsigned char)( zlen );
rahul_dahiya	0:fb8047b156bb	1172	p += zlen;
rahul_dahiya	0:fb8047b156bb	1173
rahul_dahiya	0:fb8047b156bb	1174	MBEDTLS_SSL_DEBUG_MPI( 3, "ECDH: z", &ssl->handshake->ecdh_ctx.z );
rahul_dahiya	0:fb8047b156bb	1175	}
rahul_dahiya	0:fb8047b156bb	1176	else
rahul_dahiya	0:fb8047b156bb	1177	#endif /* MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED */
rahul_dahiya	0:fb8047b156bb	1178	{
rahul_dahiya	0:fb8047b156bb	1179	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
rahul_dahiya	0:fb8047b156bb	1180	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
rahul_dahiya	0:fb8047b156bb	1181	}
rahul_dahiya	0:fb8047b156bb	1182
rahul_dahiya	0:fb8047b156bb	1183	/* opaque psk<0..2^16-1>; */
rahul_dahiya	0:fb8047b156bb	1184	if( end - p < 2 )
rahul_dahiya	0:fb8047b156bb	1185	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
rahul_dahiya	0:fb8047b156bb	1186
rahul_dahiya	0:fb8047b156bb	1187	*(p++) = (unsigned char)( psk_len >> 8 );
rahul_dahiya	0:fb8047b156bb	1188	*(p++) = (unsigned char)( psk_len );
rahul_dahiya	0:fb8047b156bb	1189
rahul_dahiya	0:fb8047b156bb	1190	if( end < p \|\| (size_t)( end - p ) < psk_len )
rahul_dahiya	0:fb8047b156bb	1191	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
rahul_dahiya	0:fb8047b156bb	1192
rahul_dahiya	0:fb8047b156bb	1193	memcpy( p, psk, psk_len );
rahul_dahiya	0:fb8047b156bb	1194	p += psk_len;
rahul_dahiya	0:fb8047b156bb	1195
rahul_dahiya	0:fb8047b156bb	1196	ssl->handshake->pmslen = p - ssl->handshake->premaster;
rahul_dahiya	0:fb8047b156bb	1197
rahul_dahiya	0:fb8047b156bb	1198	return( 0 );
rahul_dahiya	0:fb8047b156bb	1199	}
rahul_dahiya	0:fb8047b156bb	1200	#endif /* MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED */
rahul_dahiya	0:fb8047b156bb	1201
rahul_dahiya	0:fb8047b156bb	1202	#if defined(MBEDTLS_SSL_PROTO_SSL3)
rahul_dahiya	0:fb8047b156bb	1203	/*
rahul_dahiya	0:fb8047b156bb	1204	* SSLv3.0 MAC functions
rahul_dahiya	0:fb8047b156bb	1205	*/
rahul_dahiya	0:fb8047b156bb	1206	static void ssl_mac( mbedtls_md_context_t md_ctx, unsigned char secret,
rahul_dahiya	0:fb8047b156bb	1207	unsigned char *buf, size_t len,
rahul_dahiya	0:fb8047b156bb	1208	unsigned char *ctr, int type )
rahul_dahiya	0:fb8047b156bb	1209	{
rahul_dahiya	0:fb8047b156bb	1210	unsigned char header[11];
rahul_dahiya	0:fb8047b156bb	1211	unsigned char padding[48];
rahul_dahiya	0:fb8047b156bb	1212	int padlen;
rahul_dahiya	0:fb8047b156bb	1213	int md_size = mbedtls_md_get_size( md_ctx->md_info );
rahul_dahiya	0:fb8047b156bb	1214	int md_type = mbedtls_md_get_type( md_ctx->md_info );
rahul_dahiya	0:fb8047b156bb	1215
rahul_dahiya	0:fb8047b156bb	1216	/* Only MD5 and SHA-1 supported */
rahul_dahiya	0:fb8047b156bb	1217	if( md_type == MBEDTLS_MD_MD5 )
rahul_dahiya	0:fb8047b156bb	1218	padlen = 48;
rahul_dahiya	0:fb8047b156bb	1219	else
rahul_dahiya	0:fb8047b156bb	1220	padlen = 40;
rahul_dahiya	0:fb8047b156bb	1221
rahul_dahiya	0:fb8047b156bb	1222	memcpy( header, ctr, 8 );
rahul_dahiya	0:fb8047b156bb	1223	header[ 8] = (unsigned char) type;
rahul_dahiya	0:fb8047b156bb	1224	header[ 9] = (unsigned char)( len >> 8 );
rahul_dahiya	0:fb8047b156bb	1225	header[10] = (unsigned char)( len );
rahul_dahiya	0:fb8047b156bb	1226
rahul_dahiya	0:fb8047b156bb	1227	memset( padding, 0x36, padlen );
rahul_dahiya	0:fb8047b156bb	1228	mbedtls_md_starts( md_ctx );
rahul_dahiya	0:fb8047b156bb	1229	mbedtls_md_update( md_ctx, secret, md_size );
rahul_dahiya	0:fb8047b156bb	1230	mbedtls_md_update( md_ctx, padding, padlen );
rahul_dahiya	0:fb8047b156bb	1231	mbedtls_md_update( md_ctx, header, 11 );
rahul_dahiya	0:fb8047b156bb	1232	mbedtls_md_update( md_ctx, buf, len );
rahul_dahiya	0:fb8047b156bb	1233	mbedtls_md_finish( md_ctx, buf + len );
rahul_dahiya	0:fb8047b156bb	1234
rahul_dahiya	0:fb8047b156bb	1235	memset( padding, 0x5C, padlen );
rahul_dahiya	0:fb8047b156bb	1236	mbedtls_md_starts( md_ctx );
rahul_dahiya	0:fb8047b156bb	1237	mbedtls_md_update( md_ctx, secret, md_size );
rahul_dahiya	0:fb8047b156bb	1238	mbedtls_md_update( md_ctx, padding, padlen );
rahul_dahiya	0:fb8047b156bb	1239	mbedtls_md_update( md_ctx, buf + len, md_size );
rahul_dahiya	0:fb8047b156bb	1240	mbedtls_md_finish( md_ctx, buf + len );
rahul_dahiya	0:fb8047b156bb	1241	}
rahul_dahiya	0:fb8047b156bb	1242	#endif /* MBEDTLS_SSL_PROTO_SSL3 */
rahul_dahiya	0:fb8047b156bb	1243
rahul_dahiya	0:fb8047b156bb	1244	#if defined(MBEDTLS_ARC4_C) \|\| defined(MBEDTLS_CIPHER_NULL_CIPHER) \|\| \
rahul_dahiya	0:fb8047b156bb	1245	( defined(MBEDTLS_CIPHER_MODE_CBC) && \
rahul_dahiya	0:fb8047b156bb	1246	( defined(MBEDTLS_AES_C) \|\| defined(MBEDTLS_CAMELLIA_C) ) )
rahul_dahiya	0:fb8047b156bb	1247	#define SSL_SOME_MODES_USE_MAC
rahul_dahiya	0:fb8047b156bb	1248	#endif
rahul_dahiya	0:fb8047b156bb	1249
rahul_dahiya	0:fb8047b156bb	1250	/*
rahul_dahiya	0:fb8047b156bb	1251	* Encryption/decryption functions
rahul_dahiya	0:fb8047b156bb	1252	*/
rahul_dahiya	0:fb8047b156bb	1253	static int ssl_encrypt_buf( mbedtls_ssl_context *ssl )
rahul_dahiya	0:fb8047b156bb	1254	{
rahul_dahiya	0:fb8047b156bb	1255	mbedtls_cipher_mode_t mode;
rahul_dahiya	0:fb8047b156bb	1256	int auth_done = 0;
rahul_dahiya	0:fb8047b156bb	1257
rahul_dahiya	0:fb8047b156bb	1258	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> encrypt buf" ) );
rahul_dahiya	0:fb8047b156bb	1259
rahul_dahiya	0:fb8047b156bb	1260	if( ssl->session_out == NULL \|\| ssl->transform_out == NULL )
rahul_dahiya	0:fb8047b156bb	1261	{
rahul_dahiya	0:fb8047b156bb	1262	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
rahul_dahiya	0:fb8047b156bb	1263	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
rahul_dahiya	0:fb8047b156bb	1264	}
rahul_dahiya	0:fb8047b156bb	1265
rahul_dahiya	0:fb8047b156bb	1266	mode = mbedtls_cipher_get_cipher_mode( &ssl->transform_out->cipher_ctx_enc );
rahul_dahiya	0:fb8047b156bb	1267
rahul_dahiya	0:fb8047b156bb	1268	MBEDTLS_SSL_DEBUG_BUF( 4, "before encrypt: output payload",
rahul_dahiya	0:fb8047b156bb	1269	ssl->out_msg, ssl->out_msglen );
rahul_dahiya	0:fb8047b156bb	1270
rahul_dahiya	0:fb8047b156bb	1271	/*
rahul_dahiya	0:fb8047b156bb	1272	* Add MAC before if needed
rahul_dahiya	0:fb8047b156bb	1273	*/
rahul_dahiya	0:fb8047b156bb	1274	#if defined(SSL_SOME_MODES_USE_MAC)
rahul_dahiya	0:fb8047b156bb	1275	if( mode == MBEDTLS_MODE_STREAM \|\|
rahul_dahiya	0:fb8047b156bb	1276	( mode == MBEDTLS_MODE_CBC
rahul_dahiya	0:fb8047b156bb	1277	#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
rahul_dahiya	0:fb8047b156bb	1278	&& ssl->session_out->encrypt_then_mac == MBEDTLS_SSL_ETM_DISABLED
rahul_dahiya	0:fb8047b156bb	1279	#endif
rahul_dahiya	0:fb8047b156bb	1280	) )
rahul_dahiya	0:fb8047b156bb	1281	{
rahul_dahiya	0:fb8047b156bb	1282	#if defined(MBEDTLS_SSL_PROTO_SSL3)
rahul_dahiya	0:fb8047b156bb	1283	if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 )
rahul_dahiya	0:fb8047b156bb	1284	{
rahul_dahiya	0:fb8047b156bb	1285	ssl_mac( &ssl->transform_out->md_ctx_enc,
rahul_dahiya	0:fb8047b156bb	1286	ssl->transform_out->mac_enc,
rahul_dahiya	0:fb8047b156bb	1287	ssl->out_msg, ssl->out_msglen,
rahul_dahiya	0:fb8047b156bb	1288	ssl->out_ctr, ssl->out_msgtype );
rahul_dahiya	0:fb8047b156bb	1289	}
rahul_dahiya	0:fb8047b156bb	1290	else
rahul_dahiya	0:fb8047b156bb	1291	#endif
rahul_dahiya	0:fb8047b156bb	1292	#if defined(MBEDTLS_SSL_PROTO_TLS1) \|\| defined(MBEDTLS_SSL_PROTO_TLS1_1) \|\| \
rahul_dahiya	0:fb8047b156bb	1293	defined(MBEDTLS_SSL_PROTO_TLS1_2)
rahul_dahiya	0:fb8047b156bb	1294	if( ssl->minor_ver >= MBEDTLS_SSL_MINOR_VERSION_1 )
rahul_dahiya	0:fb8047b156bb	1295	{
rahul_dahiya	0:fb8047b156bb	1296	mbedtls_md_hmac_update( &ssl->transform_out->md_ctx_enc, ssl->out_ctr, 8 );
rahul_dahiya	0:fb8047b156bb	1297	mbedtls_md_hmac_update( &ssl->transform_out->md_ctx_enc, ssl->out_hdr, 3 );
rahul_dahiya	0:fb8047b156bb	1298	mbedtls_md_hmac_update( &ssl->transform_out->md_ctx_enc, ssl->out_len, 2 );
rahul_dahiya	0:fb8047b156bb	1299	mbedtls_md_hmac_update( &ssl->transform_out->md_ctx_enc,
rahul_dahiya	0:fb8047b156bb	1300	ssl->out_msg, ssl->out_msglen );
rahul_dahiya	0:fb8047b156bb	1301	mbedtls_md_hmac_finish( &ssl->transform_out->md_ctx_enc,
rahul_dahiya	0:fb8047b156bb	1302	ssl->out_msg + ssl->out_msglen );
rahul_dahiya	0:fb8047b156bb	1303	mbedtls_md_hmac_reset( &ssl->transform_out->md_ctx_enc );
rahul_dahiya	0:fb8047b156bb	1304	}
rahul_dahiya	0:fb8047b156bb	1305	else
rahul_dahiya	0:fb8047b156bb	1306	#endif
rahul_dahiya	0:fb8047b156bb	1307	{
rahul_dahiya	0:fb8047b156bb	1308	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
rahul_dahiya	0:fb8047b156bb	1309	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
rahul_dahiya	0:fb8047b156bb	1310	}
rahul_dahiya	0:fb8047b156bb	1311
rahul_dahiya	0:fb8047b156bb	1312	MBEDTLS_SSL_DEBUG_BUF( 4, "computed mac",
rahul_dahiya	0:fb8047b156bb	1313	ssl->out_msg + ssl->out_msglen,
rahul_dahiya	0:fb8047b156bb	1314	ssl->transform_out->maclen );
rahul_dahiya	0:fb8047b156bb	1315
rahul_dahiya	0:fb8047b156bb	1316	ssl->out_msglen += ssl->transform_out->maclen;
rahul_dahiya	0:fb8047b156bb	1317	auth_done++;
rahul_dahiya	0:fb8047b156bb	1318	}
rahul_dahiya	0:fb8047b156bb	1319	#endif /* AEAD not the only option */
rahul_dahiya	0:fb8047b156bb	1320
rahul_dahiya	0:fb8047b156bb	1321	/*
rahul_dahiya	0:fb8047b156bb	1322	* Encrypt
rahul_dahiya	0:fb8047b156bb	1323	*/
rahul_dahiya	0:fb8047b156bb	1324	#if defined(MBEDTLS_ARC4_C) \|\| defined(MBEDTLS_CIPHER_NULL_CIPHER)
rahul_dahiya	0:fb8047b156bb	1325	if( mode == MBEDTLS_MODE_STREAM )
rahul_dahiya	0:fb8047b156bb	1326	{
rahul_dahiya	0:fb8047b156bb	1327	int ret;
rahul_dahiya	0:fb8047b156bb	1328	size_t olen = 0;
rahul_dahiya	0:fb8047b156bb	1329
rahul_dahiya	0:fb8047b156bb	1330	MBEDTLS_SSL_DEBUG_MSG( 3, ( "before encrypt: msglen = %d, "
rahul_dahiya	0:fb8047b156bb	1331	"including %d bytes of padding",
rahul_dahiya	0:fb8047b156bb	1332	ssl->out_msglen, 0 ) );
rahul_dahiya	0:fb8047b156bb	1333
rahul_dahiya	0:fb8047b156bb	1334	if( ( ret = mbedtls_cipher_crypt( &ssl->transform_out->cipher_ctx_enc,
rahul_dahiya	0:fb8047b156bb	1335	ssl->transform_out->iv_enc,
rahul_dahiya	0:fb8047b156bb	1336	ssl->transform_out->ivlen,
rahul_dahiya	0:fb8047b156bb	1337	ssl->out_msg, ssl->out_msglen,
rahul_dahiya	0:fb8047b156bb	1338	ssl->out_msg, &olen ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	1339	{
rahul_dahiya	0:fb8047b156bb	1340	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_cipher_crypt", ret );
rahul_dahiya	0:fb8047b156bb	1341	return( ret );
rahul_dahiya	0:fb8047b156bb	1342	}
rahul_dahiya	0:fb8047b156bb	1343
rahul_dahiya	0:fb8047b156bb	1344	if( ssl->out_msglen != olen )
rahul_dahiya	0:fb8047b156bb	1345	{
rahul_dahiya	0:fb8047b156bb	1346	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
rahul_dahiya	0:fb8047b156bb	1347	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
rahul_dahiya	0:fb8047b156bb	1348	}
rahul_dahiya	0:fb8047b156bb	1349	}
rahul_dahiya	0:fb8047b156bb	1350	else
rahul_dahiya	0:fb8047b156bb	1351	#endif /* MBEDTLS_ARC4_C \|\| MBEDTLS_CIPHER_NULL_CIPHER */
rahul_dahiya	0:fb8047b156bb	1352	#if defined(MBEDTLS_GCM_C) \|\| defined(MBEDTLS_CCM_C)
rahul_dahiya	0:fb8047b156bb	1353	if( mode == MBEDTLS_MODE_GCM \|\|
rahul_dahiya	0:fb8047b156bb	1354	mode == MBEDTLS_MODE_CCM )
rahul_dahiya	0:fb8047b156bb	1355	{
rahul_dahiya	0:fb8047b156bb	1356	int ret;
rahul_dahiya	0:fb8047b156bb	1357	size_t enc_msglen, olen;
rahul_dahiya	0:fb8047b156bb	1358	unsigned char *enc_msg;
rahul_dahiya	0:fb8047b156bb	1359	unsigned char add_data[13];
rahul_dahiya	0:fb8047b156bb	1360	unsigned char taglen = ssl->transform_out->ciphersuite_info->flags &
rahul_dahiya	0:fb8047b156bb	1361	MBEDTLS_CIPHERSUITE_SHORT_TAG ? 8 : 16;
rahul_dahiya	0:fb8047b156bb	1362
rahul_dahiya	0:fb8047b156bb	1363	memcpy( add_data, ssl->out_ctr, 8 );
rahul_dahiya	0:fb8047b156bb	1364	add_data[8] = ssl->out_msgtype;
rahul_dahiya	0:fb8047b156bb	1365	mbedtls_ssl_write_version( ssl->major_ver, ssl->minor_ver,
rahul_dahiya	0:fb8047b156bb	1366	ssl->conf->transport, add_data + 9 );
rahul_dahiya	0:fb8047b156bb	1367	add_data[11] = ( ssl->out_msglen >> 8 ) & 0xFF;
rahul_dahiya	0:fb8047b156bb	1368	add_data[12] = ssl->out_msglen & 0xFF;
rahul_dahiya	0:fb8047b156bb	1369
rahul_dahiya	0:fb8047b156bb	1370	MBEDTLS_SSL_DEBUG_BUF( 4, "additional data used for AEAD",
rahul_dahiya	0:fb8047b156bb	1371	add_data, 13 );
rahul_dahiya	0:fb8047b156bb	1372
rahul_dahiya	0:fb8047b156bb	1373	/*
rahul_dahiya	0:fb8047b156bb	1374	* Generate IV
rahul_dahiya	0:fb8047b156bb	1375	*/
rahul_dahiya	0:fb8047b156bb	1376	if( ssl->transform_out->ivlen - ssl->transform_out->fixed_ivlen != 8 )
rahul_dahiya	0:fb8047b156bb	1377	{
rahul_dahiya	0:fb8047b156bb	1378	/* Reminder if we ever add an AEAD mode with a different size */
rahul_dahiya	0:fb8047b156bb	1379	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
rahul_dahiya	0:fb8047b156bb	1380	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
rahul_dahiya	0:fb8047b156bb	1381	}
rahul_dahiya	0:fb8047b156bb	1382
rahul_dahiya	0:fb8047b156bb	1383	memcpy( ssl->transform_out->iv_enc + ssl->transform_out->fixed_ivlen,
rahul_dahiya	0:fb8047b156bb	1384	ssl->out_ctr, 8 );
rahul_dahiya	0:fb8047b156bb	1385	memcpy( ssl->out_iv, ssl->out_ctr, 8 );
rahul_dahiya	0:fb8047b156bb	1386
rahul_dahiya	0:fb8047b156bb	1387	MBEDTLS_SSL_DEBUG_BUF( 4, "IV used", ssl->out_iv,
rahul_dahiya	0:fb8047b156bb	1388	ssl->transform_out->ivlen - ssl->transform_out->fixed_ivlen );
rahul_dahiya	0:fb8047b156bb	1389
rahul_dahiya	0:fb8047b156bb	1390	/*
rahul_dahiya	0:fb8047b156bb	1391	* Fix pointer positions and message length with added IV
rahul_dahiya	0:fb8047b156bb	1392	*/
rahul_dahiya	0:fb8047b156bb	1393	enc_msg = ssl->out_msg;
rahul_dahiya	0:fb8047b156bb	1394	enc_msglen = ssl->out_msglen;
rahul_dahiya	0:fb8047b156bb	1395	ssl->out_msglen += ssl->transform_out->ivlen -
rahul_dahiya	0:fb8047b156bb	1396	ssl->transform_out->fixed_ivlen;
rahul_dahiya	0:fb8047b156bb	1397
rahul_dahiya	0:fb8047b156bb	1398	MBEDTLS_SSL_DEBUG_MSG( 3, ( "before encrypt: msglen = %d, "
rahul_dahiya	0:fb8047b156bb	1399	"including %d bytes of padding",
rahul_dahiya	0:fb8047b156bb	1400	ssl->out_msglen, 0 ) );
rahul_dahiya	0:fb8047b156bb	1401
rahul_dahiya	0:fb8047b156bb	1402	/*
rahul_dahiya	0:fb8047b156bb	1403	* Encrypt and authenticate
rahul_dahiya	0:fb8047b156bb	1404	*/
rahul_dahiya	0:fb8047b156bb	1405	if( ( ret = mbedtls_cipher_auth_encrypt( &ssl->transform_out->cipher_ctx_enc,
rahul_dahiya	0:fb8047b156bb	1406	ssl->transform_out->iv_enc,
rahul_dahiya	0:fb8047b156bb	1407	ssl->transform_out->ivlen,
rahul_dahiya	0:fb8047b156bb	1408	add_data, 13,
rahul_dahiya	0:fb8047b156bb	1409	enc_msg, enc_msglen,
rahul_dahiya	0:fb8047b156bb	1410	enc_msg, &olen,
rahul_dahiya	0:fb8047b156bb	1411	enc_msg + enc_msglen, taglen ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	1412	{
rahul_dahiya	0:fb8047b156bb	1413	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_cipher_auth_encrypt", ret );
rahul_dahiya	0:fb8047b156bb	1414	return( ret );
rahul_dahiya	0:fb8047b156bb	1415	}
rahul_dahiya	0:fb8047b156bb	1416
rahul_dahiya	0:fb8047b156bb	1417	if( olen != enc_msglen )
rahul_dahiya	0:fb8047b156bb	1418	{
rahul_dahiya	0:fb8047b156bb	1419	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
rahul_dahiya	0:fb8047b156bb	1420	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
rahul_dahiya	0:fb8047b156bb	1421	}
rahul_dahiya	0:fb8047b156bb	1422
rahul_dahiya	0:fb8047b156bb	1423	ssl->out_msglen += taglen;
rahul_dahiya	0:fb8047b156bb	1424	auth_done++;
rahul_dahiya	0:fb8047b156bb	1425
rahul_dahiya	0:fb8047b156bb	1426	MBEDTLS_SSL_DEBUG_BUF( 4, "after encrypt: tag", enc_msg + enc_msglen, taglen );
rahul_dahiya	0:fb8047b156bb	1427	}
rahul_dahiya	0:fb8047b156bb	1428	else
rahul_dahiya	0:fb8047b156bb	1429	#endif /* MBEDTLS_GCM_C \|\| MBEDTLS_CCM_C */
rahul_dahiya	0:fb8047b156bb	1430	#if defined(MBEDTLS_CIPHER_MODE_CBC) && \
rahul_dahiya	0:fb8047b156bb	1431	( defined(MBEDTLS_AES_C) \|\| defined(MBEDTLS_CAMELLIA_C) )
rahul_dahiya	0:fb8047b156bb	1432	if( mode == MBEDTLS_MODE_CBC )
rahul_dahiya	0:fb8047b156bb	1433	{
rahul_dahiya	0:fb8047b156bb	1434	int ret;
rahul_dahiya	0:fb8047b156bb	1435	unsigned char *enc_msg;
rahul_dahiya	0:fb8047b156bb	1436	size_t enc_msglen, padlen, olen = 0, i;
rahul_dahiya	0:fb8047b156bb	1437
rahul_dahiya	0:fb8047b156bb	1438	padlen = ssl->transform_out->ivlen - ( ssl->out_msglen + 1 ) %
rahul_dahiya	0:fb8047b156bb	1439	ssl->transform_out->ivlen;
rahul_dahiya	0:fb8047b156bb	1440	if( padlen == ssl->transform_out->ivlen )
rahul_dahiya	0:fb8047b156bb	1441	padlen = 0;
rahul_dahiya	0:fb8047b156bb	1442
rahul_dahiya	0:fb8047b156bb	1443	for( i = 0; i <= padlen; i++ )
rahul_dahiya	0:fb8047b156bb	1444	ssl->out_msg[ssl->out_msglen + i] = (unsigned char) padlen;
rahul_dahiya	0:fb8047b156bb	1445
rahul_dahiya	0:fb8047b156bb	1446	ssl->out_msglen += padlen + 1;
rahul_dahiya	0:fb8047b156bb	1447
rahul_dahiya	0:fb8047b156bb	1448	enc_msglen = ssl->out_msglen;
rahul_dahiya	0:fb8047b156bb	1449	enc_msg = ssl->out_msg;
rahul_dahiya	0:fb8047b156bb	1450
rahul_dahiya	0:fb8047b156bb	1451	#if defined(MBEDTLS_SSL_PROTO_TLS1_1) \|\| defined(MBEDTLS_SSL_PROTO_TLS1_2)
rahul_dahiya	0:fb8047b156bb	1452	/*
rahul_dahiya	0:fb8047b156bb	1453	* Prepend per-record IV for block cipher in TLS v1.1 and up as per
rahul_dahiya	0:fb8047b156bb	1454	* Method 1 (6.2.3.2. in RFC4346 and RFC5246)
rahul_dahiya	0:fb8047b156bb	1455	*/
rahul_dahiya	0:fb8047b156bb	1456	if( ssl->minor_ver >= MBEDTLS_SSL_MINOR_VERSION_2 )
rahul_dahiya	0:fb8047b156bb	1457	{
rahul_dahiya	0:fb8047b156bb	1458	/*
rahul_dahiya	0:fb8047b156bb	1459	* Generate IV
rahul_dahiya	0:fb8047b156bb	1460	*/
rahul_dahiya	0:fb8047b156bb	1461	ret = ssl->conf->f_rng( ssl->conf->p_rng, ssl->transform_out->iv_enc,
rahul_dahiya	0:fb8047b156bb	1462	ssl->transform_out->ivlen );
rahul_dahiya	0:fb8047b156bb	1463	if( ret != 0 )
rahul_dahiya	0:fb8047b156bb	1464	return( ret );
rahul_dahiya	0:fb8047b156bb	1465
rahul_dahiya	0:fb8047b156bb	1466	memcpy( ssl->out_iv, ssl->transform_out->iv_enc,
rahul_dahiya	0:fb8047b156bb	1467	ssl->transform_out->ivlen );
rahul_dahiya	0:fb8047b156bb	1468
rahul_dahiya	0:fb8047b156bb	1469	/*
rahul_dahiya	0:fb8047b156bb	1470	* Fix pointer positions and message length with added IV
rahul_dahiya	0:fb8047b156bb	1471	*/
rahul_dahiya	0:fb8047b156bb	1472	enc_msg = ssl->out_msg;
rahul_dahiya	0:fb8047b156bb	1473	enc_msglen = ssl->out_msglen;
rahul_dahiya	0:fb8047b156bb	1474	ssl->out_msglen += ssl->transform_out->ivlen;
rahul_dahiya	0:fb8047b156bb	1475	}
rahul_dahiya	0:fb8047b156bb	1476	#endif /* MBEDTLS_SSL_PROTO_TLS1_1 \|\| MBEDTLS_SSL_PROTO_TLS1_2 */
rahul_dahiya	0:fb8047b156bb	1477
rahul_dahiya	0:fb8047b156bb	1478	MBEDTLS_SSL_DEBUG_MSG( 3, ( "before encrypt: msglen = %d, "
rahul_dahiya	0:fb8047b156bb	1479	"including %d bytes of IV and %d bytes of padding",
rahul_dahiya	0:fb8047b156bb	1480	ssl->out_msglen, ssl->transform_out->ivlen,
rahul_dahiya	0:fb8047b156bb	1481	padlen + 1 ) );
rahul_dahiya	0:fb8047b156bb	1482
rahul_dahiya	0:fb8047b156bb	1483	if( ( ret = mbedtls_cipher_crypt( &ssl->transform_out->cipher_ctx_enc,
rahul_dahiya	0:fb8047b156bb	1484	ssl->transform_out->iv_enc,
rahul_dahiya	0:fb8047b156bb	1485	ssl->transform_out->ivlen,
rahul_dahiya	0:fb8047b156bb	1486	enc_msg, enc_msglen,
rahul_dahiya	0:fb8047b156bb	1487	enc_msg, &olen ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	1488	{
rahul_dahiya	0:fb8047b156bb	1489	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_cipher_crypt", ret );
rahul_dahiya	0:fb8047b156bb	1490	return( ret );
rahul_dahiya	0:fb8047b156bb	1491	}
rahul_dahiya	0:fb8047b156bb	1492
rahul_dahiya	0:fb8047b156bb	1493	if( enc_msglen != olen )
rahul_dahiya	0:fb8047b156bb	1494	{
rahul_dahiya	0:fb8047b156bb	1495	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
rahul_dahiya	0:fb8047b156bb	1496	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
rahul_dahiya	0:fb8047b156bb	1497	}
rahul_dahiya	0:fb8047b156bb	1498
rahul_dahiya	0:fb8047b156bb	1499	#if defined(MBEDTLS_SSL_PROTO_SSL3) \|\| defined(MBEDTLS_SSL_PROTO_TLS1)
rahul_dahiya	0:fb8047b156bb	1500	if( ssl->minor_ver < MBEDTLS_SSL_MINOR_VERSION_2 )
rahul_dahiya	0:fb8047b156bb	1501	{
rahul_dahiya	0:fb8047b156bb	1502	/*
rahul_dahiya	0:fb8047b156bb	1503	* Save IV in SSL3 and TLS1
rahul_dahiya	0:fb8047b156bb	1504	*/
rahul_dahiya	0:fb8047b156bb	1505	memcpy( ssl->transform_out->iv_enc,
rahul_dahiya	0:fb8047b156bb	1506	ssl->transform_out->cipher_ctx_enc.iv,
rahul_dahiya	0:fb8047b156bb	1507	ssl->transform_out->ivlen );
rahul_dahiya	0:fb8047b156bb	1508	}
rahul_dahiya	0:fb8047b156bb	1509	#endif
rahul_dahiya	0:fb8047b156bb	1510
rahul_dahiya	0:fb8047b156bb	1511	#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
rahul_dahiya	0:fb8047b156bb	1512	if( auth_done == 0 )
rahul_dahiya	0:fb8047b156bb	1513	{
rahul_dahiya	0:fb8047b156bb	1514	/*
rahul_dahiya	0:fb8047b156bb	1515	* MAC(MAC_write_key, seq_num +
rahul_dahiya	0:fb8047b156bb	1516	* TLSCipherText.type +
rahul_dahiya	0:fb8047b156bb	1517	* TLSCipherText.version +
rahul_dahiya	0:fb8047b156bb	1518	* length_of( (IV +) ENC(...) ) +
rahul_dahiya	0:fb8047b156bb	1519	* IV + // except for TLS 1.0
rahul_dahiya	0:fb8047b156bb	1520	* ENC(content + padding + padding_length));
rahul_dahiya	0:fb8047b156bb	1521	*/
rahul_dahiya	0:fb8047b156bb	1522	unsigned char pseudo_hdr[13];
rahul_dahiya	0:fb8047b156bb	1523
rahul_dahiya	0:fb8047b156bb	1524	MBEDTLS_SSL_DEBUG_MSG( 3, ( "using encrypt then mac" ) );
rahul_dahiya	0:fb8047b156bb	1525
rahul_dahiya	0:fb8047b156bb	1526	memcpy( pseudo_hdr + 0, ssl->out_ctr, 8 );
rahul_dahiya	0:fb8047b156bb	1527	memcpy( pseudo_hdr + 8, ssl->out_hdr, 3 );
rahul_dahiya	0:fb8047b156bb	1528	pseudo_hdr[11] = (unsigned char)( ( ssl->out_msglen >> 8 ) & 0xFF );
rahul_dahiya	0:fb8047b156bb	1529	pseudo_hdr[12] = (unsigned char)( ( ssl->out_msglen ) & 0xFF );
rahul_dahiya	0:fb8047b156bb	1530
rahul_dahiya	0:fb8047b156bb	1531	MBEDTLS_SSL_DEBUG_BUF( 4, "MAC'd meta-data", pseudo_hdr, 13 );
rahul_dahiya	0:fb8047b156bb	1532
rahul_dahiya	0:fb8047b156bb	1533	mbedtls_md_hmac_update( &ssl->transform_out->md_ctx_enc, pseudo_hdr, 13 );
rahul_dahiya	0:fb8047b156bb	1534	mbedtls_md_hmac_update( &ssl->transform_out->md_ctx_enc,
rahul_dahiya	0:fb8047b156bb	1535	ssl->out_iv, ssl->out_msglen );
rahul_dahiya	0:fb8047b156bb	1536	mbedtls_md_hmac_finish( &ssl->transform_out->md_ctx_enc,
rahul_dahiya	0:fb8047b156bb	1537	ssl->out_iv + ssl->out_msglen );
rahul_dahiya	0:fb8047b156bb	1538	mbedtls_md_hmac_reset( &ssl->transform_out->md_ctx_enc );
rahul_dahiya	0:fb8047b156bb	1539
rahul_dahiya	0:fb8047b156bb	1540	ssl->out_msglen += ssl->transform_out->maclen;
rahul_dahiya	0:fb8047b156bb	1541	auth_done++;
rahul_dahiya	0:fb8047b156bb	1542	}
rahul_dahiya	0:fb8047b156bb	1543	#endif /* MBEDTLS_SSL_ENCRYPT_THEN_MAC */
rahul_dahiya	0:fb8047b156bb	1544	}
rahul_dahiya	0:fb8047b156bb	1545	else
rahul_dahiya	0:fb8047b156bb	1546	#endif /* MBEDTLS_CIPHER_MODE_CBC &&
rahul_dahiya	0:fb8047b156bb	1547	( MBEDTLS_AES_C \|\| MBEDTLS_CAMELLIA_C ) */
rahul_dahiya	0:fb8047b156bb	1548	{
rahul_dahiya	0:fb8047b156bb	1549	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
rahul_dahiya	0:fb8047b156bb	1550	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
rahul_dahiya	0:fb8047b156bb	1551	}
rahul_dahiya	0:fb8047b156bb	1552
rahul_dahiya	0:fb8047b156bb	1553	/* Make extra sure authentication was performed, exactly once */
rahul_dahiya	0:fb8047b156bb	1554	if( auth_done != 1 )
rahul_dahiya	0:fb8047b156bb	1555	{
rahul_dahiya	0:fb8047b156bb	1556	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
rahul_dahiya	0:fb8047b156bb	1557	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
rahul_dahiya	0:fb8047b156bb	1558	}
rahul_dahiya	0:fb8047b156bb	1559
rahul_dahiya	0:fb8047b156bb	1560	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= encrypt buf" ) );
rahul_dahiya	0:fb8047b156bb	1561
rahul_dahiya	0:fb8047b156bb	1562	return( 0 );
rahul_dahiya	0:fb8047b156bb	1563	}
rahul_dahiya	0:fb8047b156bb	1564
rahul_dahiya	0:fb8047b156bb	1565	#define SSL_MAX_MAC_SIZE 48
rahul_dahiya	0:fb8047b156bb	1566
rahul_dahiya	0:fb8047b156bb	1567	static int ssl_decrypt_buf( mbedtls_ssl_context *ssl )
rahul_dahiya	0:fb8047b156bb	1568	{
rahul_dahiya	0:fb8047b156bb	1569	size_t i;
rahul_dahiya	0:fb8047b156bb	1570	mbedtls_cipher_mode_t mode;
rahul_dahiya	0:fb8047b156bb	1571	int auth_done = 0;
rahul_dahiya	0:fb8047b156bb	1572	#if defined(SSL_SOME_MODES_USE_MAC)
rahul_dahiya	0:fb8047b156bb	1573	size_t padlen = 0, correct = 1;
rahul_dahiya	0:fb8047b156bb	1574	#endif
rahul_dahiya	0:fb8047b156bb	1575
rahul_dahiya	0:fb8047b156bb	1576	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> decrypt buf" ) );
rahul_dahiya	0:fb8047b156bb	1577
rahul_dahiya	0:fb8047b156bb	1578	if( ssl->session_in == NULL \|\| ssl->transform_in == NULL )
rahul_dahiya	0:fb8047b156bb	1579	{
rahul_dahiya	0:fb8047b156bb	1580	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
rahul_dahiya	0:fb8047b156bb	1581	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
rahul_dahiya	0:fb8047b156bb	1582	}
rahul_dahiya	0:fb8047b156bb	1583
rahul_dahiya	0:fb8047b156bb	1584	mode = mbedtls_cipher_get_cipher_mode( &ssl->transform_in->cipher_ctx_dec );
rahul_dahiya	0:fb8047b156bb	1585
rahul_dahiya	0:fb8047b156bb	1586	if( ssl->in_msglen < ssl->transform_in->minlen )
rahul_dahiya	0:fb8047b156bb	1587	{
rahul_dahiya	0:fb8047b156bb	1588	MBEDTLS_SSL_DEBUG_MSG( 1, ( "in_msglen (%d) < minlen (%d)",
rahul_dahiya	0:fb8047b156bb	1589	ssl->in_msglen, ssl->transform_in->minlen ) );
rahul_dahiya	0:fb8047b156bb	1590	return( MBEDTLS_ERR_SSL_INVALID_MAC );
rahul_dahiya	0:fb8047b156bb	1591	}
rahul_dahiya	0:fb8047b156bb	1592
rahul_dahiya	0:fb8047b156bb	1593	#if defined(MBEDTLS_ARC4_C) \|\| defined(MBEDTLS_CIPHER_NULL_CIPHER)
rahul_dahiya	0:fb8047b156bb	1594	if( mode == MBEDTLS_MODE_STREAM )
rahul_dahiya	0:fb8047b156bb	1595	{
rahul_dahiya	0:fb8047b156bb	1596	int ret;
rahul_dahiya	0:fb8047b156bb	1597	size_t olen = 0;
rahul_dahiya	0:fb8047b156bb	1598
rahul_dahiya	0:fb8047b156bb	1599	padlen = 0;
rahul_dahiya	0:fb8047b156bb	1600
rahul_dahiya	0:fb8047b156bb	1601	if( ( ret = mbedtls_cipher_crypt( &ssl->transform_in->cipher_ctx_dec,
rahul_dahiya	0:fb8047b156bb	1602	ssl->transform_in->iv_dec,
rahul_dahiya	0:fb8047b156bb	1603	ssl->transform_in->ivlen,
rahul_dahiya	0:fb8047b156bb	1604	ssl->in_msg, ssl->in_msglen,
rahul_dahiya	0:fb8047b156bb	1605	ssl->in_msg, &olen ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	1606	{
rahul_dahiya	0:fb8047b156bb	1607	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_cipher_crypt", ret );
rahul_dahiya	0:fb8047b156bb	1608	return( ret );
rahul_dahiya	0:fb8047b156bb	1609	}
rahul_dahiya	0:fb8047b156bb	1610
rahul_dahiya	0:fb8047b156bb	1611	if( ssl->in_msglen != olen )
rahul_dahiya	0:fb8047b156bb	1612	{
rahul_dahiya	0:fb8047b156bb	1613	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
rahul_dahiya	0:fb8047b156bb	1614	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
rahul_dahiya	0:fb8047b156bb	1615	}
rahul_dahiya	0:fb8047b156bb	1616	}
rahul_dahiya	0:fb8047b156bb	1617	else
rahul_dahiya	0:fb8047b156bb	1618	#endif /* MBEDTLS_ARC4_C \|\| MBEDTLS_CIPHER_NULL_CIPHER */
rahul_dahiya	0:fb8047b156bb	1619	#if defined(MBEDTLS_GCM_C) \|\| defined(MBEDTLS_CCM_C)
rahul_dahiya	0:fb8047b156bb	1620	if( mode == MBEDTLS_MODE_GCM \|\|
rahul_dahiya	0:fb8047b156bb	1621	mode == MBEDTLS_MODE_CCM )
rahul_dahiya	0:fb8047b156bb	1622	{
rahul_dahiya	0:fb8047b156bb	1623	int ret;
rahul_dahiya	0:fb8047b156bb	1624	size_t dec_msglen, olen;
rahul_dahiya	0:fb8047b156bb	1625	unsigned char *dec_msg;
rahul_dahiya	0:fb8047b156bb	1626	unsigned char *dec_msg_result;
rahul_dahiya	0:fb8047b156bb	1627	unsigned char add_data[13];
rahul_dahiya	0:fb8047b156bb	1628	unsigned char taglen = ssl->transform_in->ciphersuite_info->flags &
rahul_dahiya	0:fb8047b156bb	1629	MBEDTLS_CIPHERSUITE_SHORT_TAG ? 8 : 16;
rahul_dahiya	0:fb8047b156bb	1630	size_t explicit_iv_len = ssl->transform_in->ivlen -
rahul_dahiya	0:fb8047b156bb	1631	ssl->transform_in->fixed_ivlen;
rahul_dahiya	0:fb8047b156bb	1632
rahul_dahiya	0:fb8047b156bb	1633	if( ssl->in_msglen < explicit_iv_len + taglen )
rahul_dahiya	0:fb8047b156bb	1634	{
rahul_dahiya	0:fb8047b156bb	1635	MBEDTLS_SSL_DEBUG_MSG( 1, ( "msglen (%d) < explicit_iv_len (%d) "
rahul_dahiya	0:fb8047b156bb	1636	"+ taglen (%d)", ssl->in_msglen,
rahul_dahiya	0:fb8047b156bb	1637	explicit_iv_len, taglen ) );
rahul_dahiya	0:fb8047b156bb	1638	return( MBEDTLS_ERR_SSL_INVALID_MAC );
rahul_dahiya	0:fb8047b156bb	1639	}
rahul_dahiya	0:fb8047b156bb	1640	dec_msglen = ssl->in_msglen - explicit_iv_len - taglen;
rahul_dahiya	0:fb8047b156bb	1641
rahul_dahiya	0:fb8047b156bb	1642	dec_msg = ssl->in_msg;
rahul_dahiya	0:fb8047b156bb	1643	dec_msg_result = ssl->in_msg;
rahul_dahiya	0:fb8047b156bb	1644	ssl->in_msglen = dec_msglen;
rahul_dahiya	0:fb8047b156bb	1645
rahul_dahiya	0:fb8047b156bb	1646	memcpy( add_data, ssl->in_ctr, 8 );
rahul_dahiya	0:fb8047b156bb	1647	add_data[8] = ssl->in_msgtype;
rahul_dahiya	0:fb8047b156bb	1648	mbedtls_ssl_write_version( ssl->major_ver, ssl->minor_ver,
rahul_dahiya	0:fb8047b156bb	1649	ssl->conf->transport, add_data + 9 );
rahul_dahiya	0:fb8047b156bb	1650	add_data[11] = ( ssl->in_msglen >> 8 ) & 0xFF;
rahul_dahiya	0:fb8047b156bb	1651	add_data[12] = ssl->in_msglen & 0xFF;
rahul_dahiya	0:fb8047b156bb	1652
rahul_dahiya	0:fb8047b156bb	1653	MBEDTLS_SSL_DEBUG_BUF( 4, "additional data used for AEAD",
rahul_dahiya	0:fb8047b156bb	1654	add_data, 13 );
rahul_dahiya	0:fb8047b156bb	1655
rahul_dahiya	0:fb8047b156bb	1656	memcpy( ssl->transform_in->iv_dec + ssl->transform_in->fixed_ivlen,
rahul_dahiya	0:fb8047b156bb	1657	ssl->in_iv,
rahul_dahiya	0:fb8047b156bb	1658	ssl->transform_in->ivlen - ssl->transform_in->fixed_ivlen );
rahul_dahiya	0:fb8047b156bb	1659
rahul_dahiya	0:fb8047b156bb	1660	MBEDTLS_SSL_DEBUG_BUF( 4, "IV used", ssl->transform_in->iv_dec,
rahul_dahiya	0:fb8047b156bb	1661	ssl->transform_in->ivlen );
rahul_dahiya	0:fb8047b156bb	1662	MBEDTLS_SSL_DEBUG_BUF( 4, "TAG used", dec_msg + dec_msglen, taglen );
rahul_dahiya	0:fb8047b156bb	1663
rahul_dahiya	0:fb8047b156bb	1664	/*
rahul_dahiya	0:fb8047b156bb	1665	* Decrypt and authenticate
rahul_dahiya	0:fb8047b156bb	1666	*/
rahul_dahiya	0:fb8047b156bb	1667	if( ( ret = mbedtls_cipher_auth_decrypt( &ssl->transform_in->cipher_ctx_dec,
rahul_dahiya	0:fb8047b156bb	1668	ssl->transform_in->iv_dec,
rahul_dahiya	0:fb8047b156bb	1669	ssl->transform_in->ivlen,
rahul_dahiya	0:fb8047b156bb	1670	add_data, 13,
rahul_dahiya	0:fb8047b156bb	1671	dec_msg, dec_msglen,
rahul_dahiya	0:fb8047b156bb	1672	dec_msg_result, &olen,
rahul_dahiya	0:fb8047b156bb	1673	dec_msg + dec_msglen, taglen ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	1674	{
rahul_dahiya	0:fb8047b156bb	1675	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_cipher_auth_decrypt", ret );
rahul_dahiya	0:fb8047b156bb	1676
rahul_dahiya	0:fb8047b156bb	1677	if( ret == MBEDTLS_ERR_CIPHER_AUTH_FAILED )
rahul_dahiya	0:fb8047b156bb	1678	return( MBEDTLS_ERR_SSL_INVALID_MAC );
rahul_dahiya	0:fb8047b156bb	1679
rahul_dahiya	0:fb8047b156bb	1680	return( ret );
rahul_dahiya	0:fb8047b156bb	1681	}
rahul_dahiya	0:fb8047b156bb	1682	auth_done++;
rahul_dahiya	0:fb8047b156bb	1683
rahul_dahiya	0:fb8047b156bb	1684	if( olen != dec_msglen )
rahul_dahiya	0:fb8047b156bb	1685	{
rahul_dahiya	0:fb8047b156bb	1686	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
rahul_dahiya	0:fb8047b156bb	1687	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
rahul_dahiya	0:fb8047b156bb	1688	}
rahul_dahiya	0:fb8047b156bb	1689	}
rahul_dahiya	0:fb8047b156bb	1690	else
rahul_dahiya	0:fb8047b156bb	1691	#endif /* MBEDTLS_GCM_C \|\| MBEDTLS_CCM_C */
rahul_dahiya	0:fb8047b156bb	1692	#if defined(MBEDTLS_CIPHER_MODE_CBC) && \
rahul_dahiya	0:fb8047b156bb	1693	( defined(MBEDTLS_AES_C) \|\| defined(MBEDTLS_CAMELLIA_C) )
rahul_dahiya	0:fb8047b156bb	1694	if( mode == MBEDTLS_MODE_CBC )
rahul_dahiya	0:fb8047b156bb	1695	{
rahul_dahiya	0:fb8047b156bb	1696	/*
rahul_dahiya	0:fb8047b156bb	1697	* Decrypt and check the padding
rahul_dahiya	0:fb8047b156bb	1698	*/
rahul_dahiya	0:fb8047b156bb	1699	int ret;
rahul_dahiya	0:fb8047b156bb	1700	unsigned char *dec_msg;
rahul_dahiya	0:fb8047b156bb	1701	unsigned char *dec_msg_result;
rahul_dahiya	0:fb8047b156bb	1702	size_t dec_msglen;
rahul_dahiya	0:fb8047b156bb	1703	size_t minlen = 0;
rahul_dahiya	0:fb8047b156bb	1704	size_t olen = 0;
rahul_dahiya	0:fb8047b156bb	1705
rahul_dahiya	0:fb8047b156bb	1706	/*
rahul_dahiya	0:fb8047b156bb	1707	* Check immediate ciphertext sanity
rahul_dahiya	0:fb8047b156bb	1708	*/
rahul_dahiya	0:fb8047b156bb	1709	#if defined(MBEDTLS_SSL_PROTO_TLS1_1) \|\| defined(MBEDTLS_SSL_PROTO_TLS1_2)
rahul_dahiya	0:fb8047b156bb	1710	if( ssl->minor_ver >= MBEDTLS_SSL_MINOR_VERSION_2 )
rahul_dahiya	0:fb8047b156bb	1711	minlen += ssl->transform_in->ivlen;
rahul_dahiya	0:fb8047b156bb	1712	#endif
rahul_dahiya	0:fb8047b156bb	1713
rahul_dahiya	0:fb8047b156bb	1714	if( ssl->in_msglen < minlen + ssl->transform_in->ivlen \|\|
rahul_dahiya	0:fb8047b156bb	1715	ssl->in_msglen < minlen + ssl->transform_in->maclen + 1 )
rahul_dahiya	0:fb8047b156bb	1716	{
rahul_dahiya	0:fb8047b156bb	1717	MBEDTLS_SSL_DEBUG_MSG( 1, ( "msglen (%d) < max( ivlen(%d), maclen (%d) "
rahul_dahiya	0:fb8047b156bb	1718	"+ 1 ) ( + expl IV )", ssl->in_msglen,
rahul_dahiya	0:fb8047b156bb	1719	ssl->transform_in->ivlen,
rahul_dahiya	0:fb8047b156bb	1720	ssl->transform_in->maclen ) );
rahul_dahiya	0:fb8047b156bb	1721	return( MBEDTLS_ERR_SSL_INVALID_MAC );
rahul_dahiya	0:fb8047b156bb	1722	}
rahul_dahiya	0:fb8047b156bb	1723
rahul_dahiya	0:fb8047b156bb	1724	dec_msglen = ssl->in_msglen;
rahul_dahiya	0:fb8047b156bb	1725	dec_msg = ssl->in_msg;
rahul_dahiya	0:fb8047b156bb	1726	dec_msg_result = ssl->in_msg;
rahul_dahiya	0:fb8047b156bb	1727
rahul_dahiya	0:fb8047b156bb	1728	/*
rahul_dahiya	0:fb8047b156bb	1729	* Authenticate before decrypt if enabled
rahul_dahiya	0:fb8047b156bb	1730	*/
rahul_dahiya	0:fb8047b156bb	1731	#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
rahul_dahiya	0:fb8047b156bb	1732	if( ssl->session_in->encrypt_then_mac == MBEDTLS_SSL_ETM_ENABLED )
rahul_dahiya	0:fb8047b156bb	1733	{
rahul_dahiya	0:fb8047b156bb	1734	unsigned char computed_mac[SSL_MAX_MAC_SIZE];
rahul_dahiya	0:fb8047b156bb	1735	unsigned char pseudo_hdr[13];
rahul_dahiya	0:fb8047b156bb	1736
rahul_dahiya	0:fb8047b156bb	1737	MBEDTLS_SSL_DEBUG_MSG( 3, ( "using encrypt then mac" ) );
rahul_dahiya	0:fb8047b156bb	1738
rahul_dahiya	0:fb8047b156bb	1739	dec_msglen -= ssl->transform_in->maclen;
rahul_dahiya	0:fb8047b156bb	1740	ssl->in_msglen -= ssl->transform_in->maclen;
rahul_dahiya	0:fb8047b156bb	1741
rahul_dahiya	0:fb8047b156bb	1742	memcpy( pseudo_hdr + 0, ssl->in_ctr, 8 );
rahul_dahiya	0:fb8047b156bb	1743	memcpy( pseudo_hdr + 8, ssl->in_hdr, 3 );
rahul_dahiya	0:fb8047b156bb	1744	pseudo_hdr[11] = (unsigned char)( ( ssl->in_msglen >> 8 ) & 0xFF );
rahul_dahiya	0:fb8047b156bb	1745	pseudo_hdr[12] = (unsigned char)( ( ssl->in_msglen ) & 0xFF );
rahul_dahiya	0:fb8047b156bb	1746
rahul_dahiya	0:fb8047b156bb	1747	MBEDTLS_SSL_DEBUG_BUF( 4, "MAC'd meta-data", pseudo_hdr, 13 );
rahul_dahiya	0:fb8047b156bb	1748
rahul_dahiya	0:fb8047b156bb	1749	mbedtls_md_hmac_update( &ssl->transform_in->md_ctx_dec, pseudo_hdr, 13 );
rahul_dahiya	0:fb8047b156bb	1750	mbedtls_md_hmac_update( &ssl->transform_in->md_ctx_dec,
rahul_dahiya	0:fb8047b156bb	1751	ssl->in_iv, ssl->in_msglen );
rahul_dahiya	0:fb8047b156bb	1752	mbedtls_md_hmac_finish( &ssl->transform_in->md_ctx_dec, computed_mac );
rahul_dahiya	0:fb8047b156bb	1753	mbedtls_md_hmac_reset( &ssl->transform_in->md_ctx_dec );
rahul_dahiya	0:fb8047b156bb	1754
rahul_dahiya	0:fb8047b156bb	1755	MBEDTLS_SSL_DEBUG_BUF( 4, "message mac", ssl->in_iv + ssl->in_msglen,
rahul_dahiya	0:fb8047b156bb	1756	ssl->transform_in->maclen );
rahul_dahiya	0:fb8047b156bb	1757	MBEDTLS_SSL_DEBUG_BUF( 4, "computed mac", computed_mac,
rahul_dahiya	0:fb8047b156bb	1758	ssl->transform_in->maclen );
rahul_dahiya	0:fb8047b156bb	1759
rahul_dahiya	0:fb8047b156bb	1760	if( mbedtls_ssl_safer_memcmp( ssl->in_iv + ssl->in_msglen, computed_mac,
rahul_dahiya	0:fb8047b156bb	1761	ssl->transform_in->maclen ) != 0 )
rahul_dahiya	0:fb8047b156bb	1762	{
rahul_dahiya	0:fb8047b156bb	1763	MBEDTLS_SSL_DEBUG_MSG( 1, ( "message mac does not match" ) );
rahul_dahiya	0:fb8047b156bb	1764
rahul_dahiya	0:fb8047b156bb	1765	return( MBEDTLS_ERR_SSL_INVALID_MAC );
rahul_dahiya	0:fb8047b156bb	1766	}
rahul_dahiya	0:fb8047b156bb	1767	auth_done++;
rahul_dahiya	0:fb8047b156bb	1768	}
rahul_dahiya	0:fb8047b156bb	1769	#endif /* MBEDTLS_SSL_ENCRYPT_THEN_MAC */
rahul_dahiya	0:fb8047b156bb	1770
rahul_dahiya	0:fb8047b156bb	1771	/*
rahul_dahiya	0:fb8047b156bb	1772	* Check length sanity
rahul_dahiya	0:fb8047b156bb	1773	*/
rahul_dahiya	0:fb8047b156bb	1774	if( ssl->in_msglen % ssl->transform_in->ivlen != 0 )
rahul_dahiya	0:fb8047b156bb	1775	{
rahul_dahiya	0:fb8047b156bb	1776	MBEDTLS_SSL_DEBUG_MSG( 1, ( "msglen (%d) %% ivlen (%d) != 0",
rahul_dahiya	0:fb8047b156bb	1777	ssl->in_msglen, ssl->transform_in->ivlen ) );
rahul_dahiya	0:fb8047b156bb	1778	return( MBEDTLS_ERR_SSL_INVALID_MAC );
rahul_dahiya	0:fb8047b156bb	1779	}
rahul_dahiya	0:fb8047b156bb	1780
rahul_dahiya	0:fb8047b156bb	1781	#if defined(MBEDTLS_SSL_PROTO_TLS1_1) \|\| defined(MBEDTLS_SSL_PROTO_TLS1_2)
rahul_dahiya	0:fb8047b156bb	1782	/*
rahul_dahiya	0:fb8047b156bb	1783	* Initialize for prepended IV for block cipher in TLS v1.1 and up
rahul_dahiya	0:fb8047b156bb	1784	*/
rahul_dahiya	0:fb8047b156bb	1785	if( ssl->minor_ver >= MBEDTLS_SSL_MINOR_VERSION_2 )
rahul_dahiya	0:fb8047b156bb	1786	{
rahul_dahiya	0:fb8047b156bb	1787	dec_msglen -= ssl->transform_in->ivlen;
rahul_dahiya	0:fb8047b156bb	1788	ssl->in_msglen -= ssl->transform_in->ivlen;
rahul_dahiya	0:fb8047b156bb	1789
rahul_dahiya	0:fb8047b156bb	1790	for( i = 0; i < ssl->transform_in->ivlen; i++ )
rahul_dahiya	0:fb8047b156bb	1791	ssl->transform_in->iv_dec[i] = ssl->in_iv[i];
rahul_dahiya	0:fb8047b156bb	1792	}
rahul_dahiya	0:fb8047b156bb	1793	#endif /* MBEDTLS_SSL_PROTO_TLS1_1 \|\| MBEDTLS_SSL_PROTO_TLS1_2 */
rahul_dahiya	0:fb8047b156bb	1794
rahul_dahiya	0:fb8047b156bb	1795	if( ( ret = mbedtls_cipher_crypt( &ssl->transform_in->cipher_ctx_dec,
rahul_dahiya	0:fb8047b156bb	1796	ssl->transform_in->iv_dec,
rahul_dahiya	0:fb8047b156bb	1797	ssl->transform_in->ivlen,
rahul_dahiya	0:fb8047b156bb	1798	dec_msg, dec_msglen,
rahul_dahiya	0:fb8047b156bb	1799	dec_msg_result, &olen ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	1800	{
rahul_dahiya	0:fb8047b156bb	1801	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_cipher_crypt", ret );
rahul_dahiya	0:fb8047b156bb	1802	return( ret );
rahul_dahiya	0:fb8047b156bb	1803	}
rahul_dahiya	0:fb8047b156bb	1804
rahul_dahiya	0:fb8047b156bb	1805	if( dec_msglen != olen )
rahul_dahiya	0:fb8047b156bb	1806	{
rahul_dahiya	0:fb8047b156bb	1807	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
rahul_dahiya	0:fb8047b156bb	1808	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
rahul_dahiya	0:fb8047b156bb	1809	}
rahul_dahiya	0:fb8047b156bb	1810
rahul_dahiya	0:fb8047b156bb	1811	#if defined(MBEDTLS_SSL_PROTO_SSL3) \|\| defined(MBEDTLS_SSL_PROTO_TLS1)
rahul_dahiya	0:fb8047b156bb	1812	if( ssl->minor_ver < MBEDTLS_SSL_MINOR_VERSION_2 )
rahul_dahiya	0:fb8047b156bb	1813	{
rahul_dahiya	0:fb8047b156bb	1814	/*
rahul_dahiya	0:fb8047b156bb	1815	* Save IV in SSL3 and TLS1
rahul_dahiya	0:fb8047b156bb	1816	*/
rahul_dahiya	0:fb8047b156bb	1817	memcpy( ssl->transform_in->iv_dec,
rahul_dahiya	0:fb8047b156bb	1818	ssl->transform_in->cipher_ctx_dec.iv,
rahul_dahiya	0:fb8047b156bb	1819	ssl->transform_in->ivlen );
rahul_dahiya	0:fb8047b156bb	1820	}
rahul_dahiya	0:fb8047b156bb	1821	#endif
rahul_dahiya	0:fb8047b156bb	1822
rahul_dahiya	0:fb8047b156bb	1823	padlen = 1 + ssl->in_msg[ssl->in_msglen - 1];
rahul_dahiya	0:fb8047b156bb	1824
rahul_dahiya	0:fb8047b156bb	1825	if( ssl->in_msglen < ssl->transform_in->maclen + padlen &&
rahul_dahiya	0:fb8047b156bb	1826	auth_done == 0 )
rahul_dahiya	0:fb8047b156bb	1827	{
rahul_dahiya	0:fb8047b156bb	1828	#if defined(MBEDTLS_SSL_DEBUG_ALL)
rahul_dahiya	0:fb8047b156bb	1829	MBEDTLS_SSL_DEBUG_MSG( 1, ( "msglen (%d) < maclen (%d) + padlen (%d)",
rahul_dahiya	0:fb8047b156bb	1830	ssl->in_msglen, ssl->transform_in->maclen, padlen ) );
rahul_dahiya	0:fb8047b156bb	1831	#endif
rahul_dahiya	0:fb8047b156bb	1832	padlen = 0;
rahul_dahiya	0:fb8047b156bb	1833	correct = 0;
rahul_dahiya	0:fb8047b156bb	1834	}
rahul_dahiya	0:fb8047b156bb	1835
rahul_dahiya	0:fb8047b156bb	1836	#if defined(MBEDTLS_SSL_PROTO_SSL3)
rahul_dahiya	0:fb8047b156bb	1837	if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 )
rahul_dahiya	0:fb8047b156bb	1838	{
rahul_dahiya	0:fb8047b156bb	1839	if( padlen > ssl->transform_in->ivlen )
rahul_dahiya	0:fb8047b156bb	1840	{
rahul_dahiya	0:fb8047b156bb	1841	#if defined(MBEDTLS_SSL_DEBUG_ALL)
rahul_dahiya	0:fb8047b156bb	1842	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad padding length: is %d, "
rahul_dahiya	0:fb8047b156bb	1843	"should be no more than %d",
rahul_dahiya	0:fb8047b156bb	1844	padlen, ssl->transform_in->ivlen ) );
rahul_dahiya	0:fb8047b156bb	1845	#endif
rahul_dahiya	0:fb8047b156bb	1846	correct = 0;
rahul_dahiya	0:fb8047b156bb	1847	}
rahul_dahiya	0:fb8047b156bb	1848	}
rahul_dahiya	0:fb8047b156bb	1849	else
rahul_dahiya	0:fb8047b156bb	1850	#endif /* MBEDTLS_SSL_PROTO_SSL3 */
rahul_dahiya	0:fb8047b156bb	1851	#if defined(MBEDTLS_SSL_PROTO_TLS1) \|\| defined(MBEDTLS_SSL_PROTO_TLS1_1) \|\| \
rahul_dahiya	0:fb8047b156bb	1852	defined(MBEDTLS_SSL_PROTO_TLS1_2)
rahul_dahiya	0:fb8047b156bb	1853	if( ssl->minor_ver > MBEDTLS_SSL_MINOR_VERSION_0 )
rahul_dahiya	0:fb8047b156bb	1854	{
rahul_dahiya	0:fb8047b156bb	1855	/*
rahul_dahiya	0:fb8047b156bb	1856	* TLSv1+: always check the padding up to the first failure
rahul_dahiya	0:fb8047b156bb	1857	* and fake check up to 256 bytes of padding
rahul_dahiya	0:fb8047b156bb	1858	*/
rahul_dahiya	0:fb8047b156bb	1859	size_t pad_count = 0, real_count = 1;
rahul_dahiya	0:fb8047b156bb	1860	size_t padding_idx = ssl->in_msglen - padlen - 1;
rahul_dahiya	0:fb8047b156bb	1861
rahul_dahiya	0:fb8047b156bb	1862	/*
rahul_dahiya	0:fb8047b156bb	1863	* Padding is guaranteed to be incorrect if:
rahul_dahiya	0:fb8047b156bb	1864	* 1. padlen >= ssl->in_msglen
rahul_dahiya	0:fb8047b156bb	1865	*
rahul_dahiya	0:fb8047b156bb	1866	* 2. padding_idx >= MBEDTLS_SSL_MAX_CONTENT_LEN +
rahul_dahiya	0:fb8047b156bb	1867	* ssl->transform_in->maclen
rahul_dahiya	0:fb8047b156bb	1868	*
rahul_dahiya	0:fb8047b156bb	1869	* In both cases we reset padding_idx to a safe value (0) to
rahul_dahiya	0:fb8047b156bb	1870	* prevent out-of-buffer reads.
rahul_dahiya	0:fb8047b156bb	1871	*/
rahul_dahiya	0:fb8047b156bb	1872	correct &= ( ssl->in_msglen >= padlen + 1 );
rahul_dahiya	0:fb8047b156bb	1873	correct &= ( padding_idx < MBEDTLS_SSL_MAX_CONTENT_LEN +
rahul_dahiya	0:fb8047b156bb	1874	ssl->transform_in->maclen );
rahul_dahiya	0:fb8047b156bb	1875
rahul_dahiya	0:fb8047b156bb	1876	padding_idx *= correct;
rahul_dahiya	0:fb8047b156bb	1877
rahul_dahiya	0:fb8047b156bb	1878	for( i = 1; i <= 256; i++ )
rahul_dahiya	0:fb8047b156bb	1879	{
rahul_dahiya	0:fb8047b156bb	1880	real_count &= ( i <= padlen );
rahul_dahiya	0:fb8047b156bb	1881	pad_count += real_count *
rahul_dahiya	0:fb8047b156bb	1882	( ssl->in_msg[padding_idx + i] == padlen - 1 );
rahul_dahiya	0:fb8047b156bb	1883	}
rahul_dahiya	0:fb8047b156bb	1884
rahul_dahiya	0:fb8047b156bb	1885	correct &= ( pad_count == padlen ); /* Only 1 on correct padding */
rahul_dahiya	0:fb8047b156bb	1886
rahul_dahiya	0:fb8047b156bb	1887	#if defined(MBEDTLS_SSL_DEBUG_ALL)
rahul_dahiya	0:fb8047b156bb	1888	if( padlen > 0 && correct == 0 )
rahul_dahiya	0:fb8047b156bb	1889	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad padding byte detected" ) );
rahul_dahiya	0:fb8047b156bb	1890	#endif
rahul_dahiya	0:fb8047b156bb	1891	padlen &= correct * 0x1FF;
rahul_dahiya	0:fb8047b156bb	1892	}
rahul_dahiya	0:fb8047b156bb	1893	else
rahul_dahiya	0:fb8047b156bb	1894	#endif /* MBEDTLS_SSL_PROTO_TLS1 \|\| MBEDTLS_SSL_PROTO_TLS1_1 \|\| \
rahul_dahiya	0:fb8047b156bb	1895	MBEDTLS_SSL_PROTO_TLS1_2 */
rahul_dahiya	0:fb8047b156bb	1896	{
rahul_dahiya	0:fb8047b156bb	1897	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
rahul_dahiya	0:fb8047b156bb	1898	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
rahul_dahiya	0:fb8047b156bb	1899	}
rahul_dahiya	0:fb8047b156bb	1900
rahul_dahiya	0:fb8047b156bb	1901	ssl->in_msglen -= padlen;
rahul_dahiya	0:fb8047b156bb	1902	}
rahul_dahiya	0:fb8047b156bb	1903	else
rahul_dahiya	0:fb8047b156bb	1904	#endif /* MBEDTLS_CIPHER_MODE_CBC &&
rahul_dahiya	0:fb8047b156bb	1905	( MBEDTLS_AES_C \|\| MBEDTLS_CAMELLIA_C ) */
rahul_dahiya	0:fb8047b156bb	1906	{
rahul_dahiya	0:fb8047b156bb	1907	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
rahul_dahiya	0:fb8047b156bb	1908	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
rahul_dahiya	0:fb8047b156bb	1909	}
rahul_dahiya	0:fb8047b156bb	1910
rahul_dahiya	0:fb8047b156bb	1911	MBEDTLS_SSL_DEBUG_BUF( 4, "raw buffer after decryption",
rahul_dahiya	0:fb8047b156bb	1912	ssl->in_msg, ssl->in_msglen );
rahul_dahiya	0:fb8047b156bb	1913
rahul_dahiya	0:fb8047b156bb	1914	/*
rahul_dahiya	0:fb8047b156bb	1915	* Authenticate if not done yet.
rahul_dahiya	0:fb8047b156bb	1916	* Compute the MAC regardless of the padding result (RFC4346, CBCTIME).
rahul_dahiya	0:fb8047b156bb	1917	*/
rahul_dahiya	0:fb8047b156bb	1918	#if defined(SSL_SOME_MODES_USE_MAC)
rahul_dahiya	0:fb8047b156bb	1919	if( auth_done == 0 )
rahul_dahiya	0:fb8047b156bb	1920	{
rahul_dahiya	0:fb8047b156bb	1921	unsigned char tmp[SSL_MAX_MAC_SIZE];
rahul_dahiya	0:fb8047b156bb	1922
rahul_dahiya	0:fb8047b156bb	1923	ssl->in_msglen -= ssl->transform_in->maclen;
rahul_dahiya	0:fb8047b156bb	1924
rahul_dahiya	0:fb8047b156bb	1925	ssl->in_len[0] = (unsigned char)( ssl->in_msglen >> 8 );
rahul_dahiya	0:fb8047b156bb	1926	ssl->in_len[1] = (unsigned char)( ssl->in_msglen );
rahul_dahiya	0:fb8047b156bb	1927
rahul_dahiya	0:fb8047b156bb	1928	memcpy( tmp, ssl->in_msg + ssl->in_msglen, ssl->transform_in->maclen );
rahul_dahiya	0:fb8047b156bb	1929
rahul_dahiya	0:fb8047b156bb	1930	#if defined(MBEDTLS_SSL_PROTO_SSL3)
rahul_dahiya	0:fb8047b156bb	1931	if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 )
rahul_dahiya	0:fb8047b156bb	1932	{
rahul_dahiya	0:fb8047b156bb	1933	ssl_mac( &ssl->transform_in->md_ctx_dec,
rahul_dahiya	0:fb8047b156bb	1934	ssl->transform_in->mac_dec,
rahul_dahiya	0:fb8047b156bb	1935	ssl->in_msg, ssl->in_msglen,
rahul_dahiya	0:fb8047b156bb	1936	ssl->in_ctr, ssl->in_msgtype );
rahul_dahiya	0:fb8047b156bb	1937	}
rahul_dahiya	0:fb8047b156bb	1938	else
rahul_dahiya	0:fb8047b156bb	1939	#endif /* MBEDTLS_SSL_PROTO_SSL3 */
rahul_dahiya	0:fb8047b156bb	1940	#if defined(MBEDTLS_SSL_PROTO_TLS1) \|\| defined(MBEDTLS_SSL_PROTO_TLS1_1) \|\| \
rahul_dahiya	0:fb8047b156bb	1941	defined(MBEDTLS_SSL_PROTO_TLS1_2)
rahul_dahiya	0:fb8047b156bb	1942	if( ssl->minor_ver > MBEDTLS_SSL_MINOR_VERSION_0 )
rahul_dahiya	0:fb8047b156bb	1943	{
rahul_dahiya	0:fb8047b156bb	1944	/*
rahul_dahiya	0:fb8047b156bb	1945	* Process MAC and always update for padlen afterwards to make
rahul_dahiya	0:fb8047b156bb	1946	* total time independent of padlen
rahul_dahiya	0:fb8047b156bb	1947	*
rahul_dahiya	0:fb8047b156bb	1948	* extra_run compensates MAC check for padlen
rahul_dahiya	0:fb8047b156bb	1949	*
rahul_dahiya	0:fb8047b156bb	1950	* Known timing attacks:
rahul_dahiya	0:fb8047b156bb	1951	* - Lucky Thirteen (http://www.isg.rhul.ac.uk/tls/TLStiming.pdf)
rahul_dahiya	0:fb8047b156bb	1952	*
rahul_dahiya	0:fb8047b156bb	1953	* We use ( ( Lx + 8 ) / 64 ) to handle 'negative Lx' values
rahul_dahiya	0:fb8047b156bb	1954	* correctly. (We round down instead of up, so -56 is the correct
rahul_dahiya	0:fb8047b156bb	1955	* value for our calculations instead of -55)
rahul_dahiya	0:fb8047b156bb	1956	*/
rahul_dahiya	0:fb8047b156bb	1957	size_t j, extra_run = 0;
rahul_dahiya	0:fb8047b156bb	1958	extra_run = ( 13 + ssl->in_msglen + padlen + 8 ) / 64 -
rahul_dahiya	0:fb8047b156bb	1959	( 13 + ssl->in_msglen + 8 ) / 64;
rahul_dahiya	0:fb8047b156bb	1960
rahul_dahiya	0:fb8047b156bb	1961	extra_run &= correct * 0xFF;
rahul_dahiya	0:fb8047b156bb	1962
rahul_dahiya	0:fb8047b156bb	1963	mbedtls_md_hmac_update( &ssl->transform_in->md_ctx_dec, ssl->in_ctr, 8 );
rahul_dahiya	0:fb8047b156bb	1964	mbedtls_md_hmac_update( &ssl->transform_in->md_ctx_dec, ssl->in_hdr, 3 );
rahul_dahiya	0:fb8047b156bb	1965	mbedtls_md_hmac_update( &ssl->transform_in->md_ctx_dec, ssl->in_len, 2 );
rahul_dahiya	0:fb8047b156bb	1966	mbedtls_md_hmac_update( &ssl->transform_in->md_ctx_dec, ssl->in_msg,
rahul_dahiya	0:fb8047b156bb	1967	ssl->in_msglen );
rahul_dahiya	0:fb8047b156bb	1968	mbedtls_md_hmac_finish( &ssl->transform_in->md_ctx_dec,
rahul_dahiya	0:fb8047b156bb	1969	ssl->in_msg + ssl->in_msglen );
rahul_dahiya	0:fb8047b156bb	1970	/* Call mbedtls_md_process at least once due to cache attacks */
rahul_dahiya	0:fb8047b156bb	1971	for( j = 0; j < extra_run + 1; j++ )
rahul_dahiya	0:fb8047b156bb	1972	mbedtls_md_process( &ssl->transform_in->md_ctx_dec, ssl->in_msg );
rahul_dahiya	0:fb8047b156bb	1973
rahul_dahiya	0:fb8047b156bb	1974	mbedtls_md_hmac_reset( &ssl->transform_in->md_ctx_dec );
rahul_dahiya	0:fb8047b156bb	1975	}
rahul_dahiya	0:fb8047b156bb	1976	else
rahul_dahiya	0:fb8047b156bb	1977	#endif /* MBEDTLS_SSL_PROTO_TLS1 \|\| MBEDTLS_SSL_PROTO_TLS1_1 \|\| \
rahul_dahiya	0:fb8047b156bb	1978	MBEDTLS_SSL_PROTO_TLS1_2 */
rahul_dahiya	0:fb8047b156bb	1979	{
rahul_dahiya	0:fb8047b156bb	1980	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
rahul_dahiya	0:fb8047b156bb	1981	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
rahul_dahiya	0:fb8047b156bb	1982	}
rahul_dahiya	0:fb8047b156bb	1983
rahul_dahiya	0:fb8047b156bb	1984	MBEDTLS_SSL_DEBUG_BUF( 4, "message mac", tmp, ssl->transform_in->maclen );
rahul_dahiya	0:fb8047b156bb	1985	MBEDTLS_SSL_DEBUG_BUF( 4, "computed mac", ssl->in_msg + ssl->in_msglen,
rahul_dahiya	0:fb8047b156bb	1986	ssl->transform_in->maclen );
rahul_dahiya	0:fb8047b156bb	1987
rahul_dahiya	0:fb8047b156bb	1988	if( mbedtls_ssl_safer_memcmp( tmp, ssl->in_msg + ssl->in_msglen,
rahul_dahiya	0:fb8047b156bb	1989	ssl->transform_in->maclen ) != 0 )
rahul_dahiya	0:fb8047b156bb	1990	{
rahul_dahiya	0:fb8047b156bb	1991	#if defined(MBEDTLS_SSL_DEBUG_ALL)
rahul_dahiya	0:fb8047b156bb	1992	MBEDTLS_SSL_DEBUG_MSG( 1, ( "message mac does not match" ) );
rahul_dahiya	0:fb8047b156bb	1993	#endif
rahul_dahiya	0:fb8047b156bb	1994	correct = 0;
rahul_dahiya	0:fb8047b156bb	1995	}
rahul_dahiya	0:fb8047b156bb	1996	auth_done++;
rahul_dahiya	0:fb8047b156bb	1997
rahul_dahiya	0:fb8047b156bb	1998	/*
rahul_dahiya	0:fb8047b156bb	1999	* Finally check the correct flag
rahul_dahiya	0:fb8047b156bb	2000	*/
rahul_dahiya	0:fb8047b156bb	2001	if( correct == 0 )
rahul_dahiya	0:fb8047b156bb	2002	return( MBEDTLS_ERR_SSL_INVALID_MAC );
rahul_dahiya	0:fb8047b156bb	2003	}
rahul_dahiya	0:fb8047b156bb	2004	#endif /* SSL_SOME_MODES_USE_MAC */
rahul_dahiya	0:fb8047b156bb	2005
rahul_dahiya	0:fb8047b156bb	2006	/* Make extra sure authentication was performed, exactly once */
rahul_dahiya	0:fb8047b156bb	2007	if( auth_done != 1 )
rahul_dahiya	0:fb8047b156bb	2008	{
rahul_dahiya	0:fb8047b156bb	2009	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
rahul_dahiya	0:fb8047b156bb	2010	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
rahul_dahiya	0:fb8047b156bb	2011	}
rahul_dahiya	0:fb8047b156bb	2012
rahul_dahiya	0:fb8047b156bb	2013	if( ssl->in_msglen == 0 )
rahul_dahiya	0:fb8047b156bb	2014	{
rahul_dahiya	0:fb8047b156bb	2015	ssl->nb_zero++;
rahul_dahiya	0:fb8047b156bb	2016
rahul_dahiya	0:fb8047b156bb	2017	/*
rahul_dahiya	0:fb8047b156bb	2018	* Three or more empty messages may be a DoS attack
rahul_dahiya	0:fb8047b156bb	2019	* (excessive CPU consumption).
rahul_dahiya	0:fb8047b156bb	2020	*/
rahul_dahiya	0:fb8047b156bb	2021	if( ssl->nb_zero > 3 )
rahul_dahiya	0:fb8047b156bb	2022	{
rahul_dahiya	0:fb8047b156bb	2023	MBEDTLS_SSL_DEBUG_MSG( 1, ( "received four consecutive empty "
rahul_dahiya	0:fb8047b156bb	2024	"messages, possible DoS attack" ) );
rahul_dahiya	0:fb8047b156bb	2025	return( MBEDTLS_ERR_SSL_INVALID_MAC );
rahul_dahiya	0:fb8047b156bb	2026	}
rahul_dahiya	0:fb8047b156bb	2027	}
rahul_dahiya	0:fb8047b156bb	2028	else
rahul_dahiya	0:fb8047b156bb	2029	ssl->nb_zero = 0;
rahul_dahiya	0:fb8047b156bb	2030
rahul_dahiya	0:fb8047b156bb	2031	#if defined(MBEDTLS_SSL_PROTO_DTLS)
rahul_dahiya	0:fb8047b156bb	2032	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
rahul_dahiya	0:fb8047b156bb	2033	{
rahul_dahiya	0:fb8047b156bb	2034	; /* in_ctr read from peer, not maintained internally */
rahul_dahiya	0:fb8047b156bb	2035	}
rahul_dahiya	0:fb8047b156bb	2036	else
rahul_dahiya	0:fb8047b156bb	2037	#endif
rahul_dahiya	0:fb8047b156bb	2038	{
rahul_dahiya	0:fb8047b156bb	2039	for( i = 8; i > ssl_ep_len( ssl ); i-- )
rahul_dahiya	0:fb8047b156bb	2040	if( ++ssl->in_ctr[i - 1] != 0 )
rahul_dahiya	0:fb8047b156bb	2041	break;
rahul_dahiya	0:fb8047b156bb	2042
rahul_dahiya	0:fb8047b156bb	2043	/* The loop goes to its end iff the counter is wrapping */
rahul_dahiya	0:fb8047b156bb	2044	if( i == ssl_ep_len( ssl ) )
rahul_dahiya	0:fb8047b156bb	2045	{
rahul_dahiya	0:fb8047b156bb	2046	MBEDTLS_SSL_DEBUG_MSG( 1, ( "incoming message counter would wrap" ) );
rahul_dahiya	0:fb8047b156bb	2047	return( MBEDTLS_ERR_SSL_COUNTER_WRAPPING );
rahul_dahiya	0:fb8047b156bb	2048	}
rahul_dahiya	0:fb8047b156bb	2049	}
rahul_dahiya	0:fb8047b156bb	2050
rahul_dahiya	0:fb8047b156bb	2051	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= decrypt buf" ) );
rahul_dahiya	0:fb8047b156bb	2052
rahul_dahiya	0:fb8047b156bb	2053	return( 0 );
rahul_dahiya	0:fb8047b156bb	2054	}
rahul_dahiya	0:fb8047b156bb	2055
rahul_dahiya	0:fb8047b156bb	2056	#undef MAC_NONE
rahul_dahiya	0:fb8047b156bb	2057	#undef MAC_PLAINTEXT
rahul_dahiya	0:fb8047b156bb	2058	#undef MAC_CIPHERTEXT
rahul_dahiya	0:fb8047b156bb	2059
rahul_dahiya	0:fb8047b156bb	2060	#if defined(MBEDTLS_ZLIB_SUPPORT)
rahul_dahiya	0:fb8047b156bb	2061	/*
rahul_dahiya	0:fb8047b156bb	2062	* Compression/decompression functions
rahul_dahiya	0:fb8047b156bb	2063	*/
rahul_dahiya	0:fb8047b156bb	2064	static int ssl_compress_buf( mbedtls_ssl_context *ssl )
rahul_dahiya	0:fb8047b156bb	2065	{
rahul_dahiya	0:fb8047b156bb	2066	int ret;
rahul_dahiya	0:fb8047b156bb	2067	unsigned char *msg_post = ssl->out_msg;
rahul_dahiya	0:fb8047b156bb	2068	size_t len_pre = ssl->out_msglen;
rahul_dahiya	0:fb8047b156bb	2069	unsigned char *msg_pre = ssl->compress_buf;
rahul_dahiya	0:fb8047b156bb	2070
rahul_dahiya	0:fb8047b156bb	2071	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> compress buf" ) );
rahul_dahiya	0:fb8047b156bb	2072
rahul_dahiya	0:fb8047b156bb	2073	if( len_pre == 0 )
rahul_dahiya	0:fb8047b156bb	2074	return( 0 );
rahul_dahiya	0:fb8047b156bb	2075
rahul_dahiya	0:fb8047b156bb	2076	memcpy( msg_pre, ssl->out_msg, len_pre );
rahul_dahiya	0:fb8047b156bb	2077
rahul_dahiya	0:fb8047b156bb	2078	MBEDTLS_SSL_DEBUG_MSG( 3, ( "before compression: msglen = %d, ",
rahul_dahiya	0:fb8047b156bb	2079	ssl->out_msglen ) );
rahul_dahiya	0:fb8047b156bb	2080
rahul_dahiya	0:fb8047b156bb	2081	MBEDTLS_SSL_DEBUG_BUF( 4, "before compression: output payload",
rahul_dahiya	0:fb8047b156bb	2082	ssl->out_msg, ssl->out_msglen );
rahul_dahiya	0:fb8047b156bb	2083
rahul_dahiya	0:fb8047b156bb	2084	ssl->transform_out->ctx_deflate.next_in = msg_pre;
rahul_dahiya	0:fb8047b156bb	2085	ssl->transform_out->ctx_deflate.avail_in = len_pre;
rahul_dahiya	0:fb8047b156bb	2086	ssl->transform_out->ctx_deflate.next_out = msg_post;
rahul_dahiya	0:fb8047b156bb	2087	ssl->transform_out->ctx_deflate.avail_out = MBEDTLS_SSL_BUFFER_LEN;
rahul_dahiya	0:fb8047b156bb	2088
rahul_dahiya	0:fb8047b156bb	2089	ret = deflate( &ssl->transform_out->ctx_deflate, Z_SYNC_FLUSH );
rahul_dahiya	0:fb8047b156bb	2090	if( ret != Z_OK )
rahul_dahiya	0:fb8047b156bb	2091	{
rahul_dahiya	0:fb8047b156bb	2092	MBEDTLS_SSL_DEBUG_MSG( 1, ( "failed to perform compression (%d)", ret ) );
rahul_dahiya	0:fb8047b156bb	2093	return( MBEDTLS_ERR_SSL_COMPRESSION_FAILED );
rahul_dahiya	0:fb8047b156bb	2094	}
rahul_dahiya	0:fb8047b156bb	2095
rahul_dahiya	0:fb8047b156bb	2096	ssl->out_msglen = MBEDTLS_SSL_BUFFER_LEN -
rahul_dahiya	0:fb8047b156bb	2097	ssl->transform_out->ctx_deflate.avail_out;
rahul_dahiya	0:fb8047b156bb	2098
rahul_dahiya	0:fb8047b156bb	2099	MBEDTLS_SSL_DEBUG_MSG( 3, ( "after compression: msglen = %d, ",
rahul_dahiya	0:fb8047b156bb	2100	ssl->out_msglen ) );
rahul_dahiya	0:fb8047b156bb	2101
rahul_dahiya	0:fb8047b156bb	2102	MBEDTLS_SSL_DEBUG_BUF( 4, "after compression: output payload",
rahul_dahiya	0:fb8047b156bb	2103	ssl->out_msg, ssl->out_msglen );
rahul_dahiya	0:fb8047b156bb	2104
rahul_dahiya	0:fb8047b156bb	2105	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= compress buf" ) );
rahul_dahiya	0:fb8047b156bb	2106
rahul_dahiya	0:fb8047b156bb	2107	return( 0 );
rahul_dahiya	0:fb8047b156bb	2108	}
rahul_dahiya	0:fb8047b156bb	2109
rahul_dahiya	0:fb8047b156bb	2110	static int ssl_decompress_buf( mbedtls_ssl_context *ssl )
rahul_dahiya	0:fb8047b156bb	2111	{
rahul_dahiya	0:fb8047b156bb	2112	int ret;
rahul_dahiya	0:fb8047b156bb	2113	unsigned char *msg_post = ssl->in_msg;
rahul_dahiya	0:fb8047b156bb	2114	size_t len_pre = ssl->in_msglen;
rahul_dahiya	0:fb8047b156bb	2115	unsigned char *msg_pre = ssl->compress_buf;
rahul_dahiya	0:fb8047b156bb	2116
rahul_dahiya	0:fb8047b156bb	2117	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> decompress buf" ) );
rahul_dahiya	0:fb8047b156bb	2118
rahul_dahiya	0:fb8047b156bb	2119	if( len_pre == 0 )
rahul_dahiya	0:fb8047b156bb	2120	return( 0 );
rahul_dahiya	0:fb8047b156bb	2121
rahul_dahiya	0:fb8047b156bb	2122	memcpy( msg_pre, ssl->in_msg, len_pre );
rahul_dahiya	0:fb8047b156bb	2123
rahul_dahiya	0:fb8047b156bb	2124	MBEDTLS_SSL_DEBUG_MSG( 3, ( "before decompression: msglen = %d, ",
rahul_dahiya	0:fb8047b156bb	2125	ssl->in_msglen ) );
rahul_dahiya	0:fb8047b156bb	2126
rahul_dahiya	0:fb8047b156bb	2127	MBEDTLS_SSL_DEBUG_BUF( 4, "before decompression: input payload",
rahul_dahiya	0:fb8047b156bb	2128	ssl->in_msg, ssl->in_msglen );
rahul_dahiya	0:fb8047b156bb	2129
rahul_dahiya	0:fb8047b156bb	2130	ssl->transform_in->ctx_inflate.next_in = msg_pre;
rahul_dahiya	0:fb8047b156bb	2131	ssl->transform_in->ctx_inflate.avail_in = len_pre;
rahul_dahiya	0:fb8047b156bb	2132	ssl->transform_in->ctx_inflate.next_out = msg_post;
rahul_dahiya	0:fb8047b156bb	2133	ssl->transform_in->ctx_inflate.avail_out = MBEDTLS_SSL_MAX_CONTENT_LEN;
rahul_dahiya	0:fb8047b156bb	2134
rahul_dahiya	0:fb8047b156bb	2135	ret = inflate( &ssl->transform_in->ctx_inflate, Z_SYNC_FLUSH );
rahul_dahiya	0:fb8047b156bb	2136	if( ret != Z_OK )
rahul_dahiya	0:fb8047b156bb	2137	{
rahul_dahiya	0:fb8047b156bb	2138	MBEDTLS_SSL_DEBUG_MSG( 1, ( "failed to perform decompression (%d)", ret ) );
rahul_dahiya	0:fb8047b156bb	2139	return( MBEDTLS_ERR_SSL_COMPRESSION_FAILED );
rahul_dahiya	0:fb8047b156bb	2140	}
rahul_dahiya	0:fb8047b156bb	2141
rahul_dahiya	0:fb8047b156bb	2142	ssl->in_msglen = MBEDTLS_SSL_MAX_CONTENT_LEN -
rahul_dahiya	0:fb8047b156bb	2143	ssl->transform_in->ctx_inflate.avail_out;
rahul_dahiya	0:fb8047b156bb	2144
rahul_dahiya	0:fb8047b156bb	2145	MBEDTLS_SSL_DEBUG_MSG( 3, ( "after decompression: msglen = %d, ",
rahul_dahiya	0:fb8047b156bb	2146	ssl->in_msglen ) );
rahul_dahiya	0:fb8047b156bb	2147
rahul_dahiya	0:fb8047b156bb	2148	MBEDTLS_SSL_DEBUG_BUF( 4, "after decompression: input payload",
rahul_dahiya	0:fb8047b156bb	2149	ssl->in_msg, ssl->in_msglen );
rahul_dahiya	0:fb8047b156bb	2150
rahul_dahiya	0:fb8047b156bb	2151	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= decompress buf" ) );
rahul_dahiya	0:fb8047b156bb	2152
rahul_dahiya	0:fb8047b156bb	2153	return( 0 );
rahul_dahiya	0:fb8047b156bb	2154	}
rahul_dahiya	0:fb8047b156bb	2155	#endif /* MBEDTLS_ZLIB_SUPPORT */
rahul_dahiya	0:fb8047b156bb	2156
rahul_dahiya	0:fb8047b156bb	2157	#if defined(MBEDTLS_SSL_SRV_C) && defined(MBEDTLS_SSL_RENEGOTIATION)
rahul_dahiya	0:fb8047b156bb	2158	static int ssl_write_hello_request( mbedtls_ssl_context *ssl );
rahul_dahiya	0:fb8047b156bb	2159
rahul_dahiya	0:fb8047b156bb	2160	#if defined(MBEDTLS_SSL_PROTO_DTLS)
rahul_dahiya	0:fb8047b156bb	2161	static int ssl_resend_hello_request( mbedtls_ssl_context *ssl )
rahul_dahiya	0:fb8047b156bb	2162	{
rahul_dahiya	0:fb8047b156bb	2163	/* If renegotiation is not enforced, retransmit until we would reach max
rahul_dahiya	0:fb8047b156bb	2164	* timeout if we were using the usual handshake doubling scheme */
rahul_dahiya	0:fb8047b156bb	2165	if( ssl->conf->renego_max_records < 0 )
rahul_dahiya	0:fb8047b156bb	2166	{
rahul_dahiya	0:fb8047b156bb	2167	uint32_t ratio = ssl->conf->hs_timeout_max / ssl->conf->hs_timeout_min + 1;
rahul_dahiya	0:fb8047b156bb	2168	unsigned char doublings = 1;
rahul_dahiya	0:fb8047b156bb	2169
rahul_dahiya	0:fb8047b156bb	2170	while( ratio != 0 )
rahul_dahiya	0:fb8047b156bb	2171	{
rahul_dahiya	0:fb8047b156bb	2172	++doublings;
rahul_dahiya	0:fb8047b156bb	2173	ratio >>= 1;
rahul_dahiya	0:fb8047b156bb	2174	}
rahul_dahiya	0:fb8047b156bb	2175
rahul_dahiya	0:fb8047b156bb	2176	if( ++ssl->renego_records_seen > doublings )
rahul_dahiya	0:fb8047b156bb	2177	{
rahul_dahiya	0:fb8047b156bb	2178	MBEDTLS_SSL_DEBUG_MSG( 2, ( "no longer retransmitting hello request" ) );
rahul_dahiya	0:fb8047b156bb	2179	return( 0 );
rahul_dahiya	0:fb8047b156bb	2180	}
rahul_dahiya	0:fb8047b156bb	2181	}
rahul_dahiya	0:fb8047b156bb	2182
rahul_dahiya	0:fb8047b156bb	2183	return( ssl_write_hello_request( ssl ) );
rahul_dahiya	0:fb8047b156bb	2184	}
rahul_dahiya	0:fb8047b156bb	2185	#endif
rahul_dahiya	0:fb8047b156bb	2186	#endif /* MBEDTLS_SSL_SRV_C && MBEDTLS_SSL_RENEGOTIATION */
rahul_dahiya	0:fb8047b156bb	2187
rahul_dahiya	0:fb8047b156bb	2188	/*
rahul_dahiya	0:fb8047b156bb	2189	* Fill the input message buffer by appending data to it.
rahul_dahiya	0:fb8047b156bb	2190	* The amount of data already fetched is in ssl->in_left.
rahul_dahiya	0:fb8047b156bb	2191	*
rahul_dahiya	0:fb8047b156bb	2192	* If we return 0, is it guaranteed that (at least) nb_want bytes are
rahul_dahiya	0:fb8047b156bb	2193	* available (from this read and/or a previous one). Otherwise, an error code
rahul_dahiya	0:fb8047b156bb	2194	* is returned (possibly EOF or WANT_READ).
rahul_dahiya	0:fb8047b156bb	2195	*
rahul_dahiya	0:fb8047b156bb	2196	* With stream transport (TLS) on success ssl->in_left == nb_want, but
rahul_dahiya	0:fb8047b156bb	2197	* with datagram transport (DTLS) on success ssl->in_left >= nb_want,
rahul_dahiya	0:fb8047b156bb	2198	* since we always read a whole datagram at once.
rahul_dahiya	0:fb8047b156bb	2199	*
rahul_dahiya	0:fb8047b156bb	2200	* For DTLS, it is up to the caller to set ssl->next_record_offset when
rahul_dahiya	0:fb8047b156bb	2201	* they're done reading a record.
rahul_dahiya	0:fb8047b156bb	2202	*/
rahul_dahiya	0:fb8047b156bb	2203	int mbedtls_ssl_fetch_input( mbedtls_ssl_context *ssl, size_t nb_want )
rahul_dahiya	0:fb8047b156bb	2204	{
rahul_dahiya	0:fb8047b156bb	2205	int ret;
rahul_dahiya	0:fb8047b156bb	2206	size_t len;
rahul_dahiya	0:fb8047b156bb	2207
rahul_dahiya	0:fb8047b156bb	2208	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> fetch input" ) );
rahul_dahiya	0:fb8047b156bb	2209
rahul_dahiya	0:fb8047b156bb	2210	if( ssl->f_recv == NULL && ssl->f_recv_timeout == NULL )
rahul_dahiya	0:fb8047b156bb	2211	{
rahul_dahiya	0:fb8047b156bb	2212	MBEDTLS_SSL_DEBUG_MSG( 1, ( "Bad usage of mbedtls_ssl_set_bio() "
rahul_dahiya	0:fb8047b156bb	2213	"or mbedtls_ssl_set_bio()" ) );
rahul_dahiya	0:fb8047b156bb	2214	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
rahul_dahiya	0:fb8047b156bb	2215	}
rahul_dahiya	0:fb8047b156bb	2216
rahul_dahiya	0:fb8047b156bb	2217	if( nb_want > MBEDTLS_SSL_BUFFER_LEN - (size_t)( ssl->in_hdr - ssl->in_buf ) )
rahul_dahiya	0:fb8047b156bb	2218	{
rahul_dahiya	0:fb8047b156bb	2219	MBEDTLS_SSL_DEBUG_MSG( 1, ( "requesting more data than fits" ) );
rahul_dahiya	0:fb8047b156bb	2220	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
rahul_dahiya	0:fb8047b156bb	2221	}
rahul_dahiya	0:fb8047b156bb	2222
rahul_dahiya	0:fb8047b156bb	2223	#if defined(MBEDTLS_SSL_PROTO_DTLS)
rahul_dahiya	0:fb8047b156bb	2224	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
rahul_dahiya	0:fb8047b156bb	2225	{
rahul_dahiya	0:fb8047b156bb	2226	uint32_t timeout;
rahul_dahiya	0:fb8047b156bb	2227
rahul_dahiya	0:fb8047b156bb	2228	/* Just to be sure */
rahul_dahiya	0:fb8047b156bb	2229	if( ssl->f_set_timer == NULL \|\| ssl->f_get_timer == NULL )
rahul_dahiya	0:fb8047b156bb	2230	{
rahul_dahiya	0:fb8047b156bb	2231	MBEDTLS_SSL_DEBUG_MSG( 1, ( "You must use "
rahul_dahiya	0:fb8047b156bb	2232	"mbedtls_ssl_set_timer_cb() for DTLS" ) );
rahul_dahiya	0:fb8047b156bb	2233	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
rahul_dahiya	0:fb8047b156bb	2234	}
rahul_dahiya	0:fb8047b156bb	2235
rahul_dahiya	0:fb8047b156bb	2236	/*
rahul_dahiya	0:fb8047b156bb	2237	* The point is, we need to always read a full datagram at once, so we
rahul_dahiya	0:fb8047b156bb	2238	* sometimes read more then requested, and handle the additional data.
rahul_dahiya	0:fb8047b156bb	2239	* It could be the rest of the current record (while fetching the
rahul_dahiya	0:fb8047b156bb	2240	* header) and/or some other records in the same datagram.
rahul_dahiya	0:fb8047b156bb	2241	*/
rahul_dahiya	0:fb8047b156bb	2242
rahul_dahiya	0:fb8047b156bb	2243	/*
rahul_dahiya	0:fb8047b156bb	2244	* Move to the next record in the already read datagram if applicable
rahul_dahiya	0:fb8047b156bb	2245	*/
rahul_dahiya	0:fb8047b156bb	2246	if( ssl->next_record_offset != 0 )
rahul_dahiya	0:fb8047b156bb	2247	{
rahul_dahiya	0:fb8047b156bb	2248	if( ssl->in_left < ssl->next_record_offset )
rahul_dahiya	0:fb8047b156bb	2249	{
rahul_dahiya	0:fb8047b156bb	2250	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
rahul_dahiya	0:fb8047b156bb	2251	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
rahul_dahiya	0:fb8047b156bb	2252	}
rahul_dahiya	0:fb8047b156bb	2253
rahul_dahiya	0:fb8047b156bb	2254	ssl->in_left -= ssl->next_record_offset;
rahul_dahiya	0:fb8047b156bb	2255
rahul_dahiya	0:fb8047b156bb	2256	if( ssl->in_left != 0 )
rahul_dahiya	0:fb8047b156bb	2257	{
rahul_dahiya	0:fb8047b156bb	2258	MBEDTLS_SSL_DEBUG_MSG( 2, ( "next record in same datagram, offset: %d",
rahul_dahiya	0:fb8047b156bb	2259	ssl->next_record_offset ) );
rahul_dahiya	0:fb8047b156bb	2260	memmove( ssl->in_hdr,
rahul_dahiya	0:fb8047b156bb	2261	ssl->in_hdr + ssl->next_record_offset,
rahul_dahiya	0:fb8047b156bb	2262	ssl->in_left );
rahul_dahiya	0:fb8047b156bb	2263	}
rahul_dahiya	0:fb8047b156bb	2264
rahul_dahiya	0:fb8047b156bb	2265	ssl->next_record_offset = 0;
rahul_dahiya	0:fb8047b156bb	2266	}
rahul_dahiya	0:fb8047b156bb	2267
rahul_dahiya	0:fb8047b156bb	2268	MBEDTLS_SSL_DEBUG_MSG( 2, ( "in_left: %d, nb_want: %d",
rahul_dahiya	0:fb8047b156bb	2269	ssl->in_left, nb_want ) );
rahul_dahiya	0:fb8047b156bb	2270
rahul_dahiya	0:fb8047b156bb	2271	/*
rahul_dahiya	0:fb8047b156bb	2272	* Done if we already have enough data.
rahul_dahiya	0:fb8047b156bb	2273	*/
rahul_dahiya	0:fb8047b156bb	2274	if( nb_want <= ssl->in_left)
rahul_dahiya	0:fb8047b156bb	2275	{
rahul_dahiya	0:fb8047b156bb	2276	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= fetch input" ) );
rahul_dahiya	0:fb8047b156bb	2277	return( 0 );
rahul_dahiya	0:fb8047b156bb	2278	}
rahul_dahiya	0:fb8047b156bb	2279
rahul_dahiya	0:fb8047b156bb	2280	/*
rahul_dahiya	0:fb8047b156bb	2281	* A record can't be split accross datagrams. If we need to read but
rahul_dahiya	0:fb8047b156bb	2282	* are not at the beginning of a new record, the caller did something
rahul_dahiya	0:fb8047b156bb	2283	* wrong.
rahul_dahiya	0:fb8047b156bb	2284	*/
rahul_dahiya	0:fb8047b156bb	2285	if( ssl->in_left != 0 )
rahul_dahiya	0:fb8047b156bb	2286	{
rahul_dahiya	0:fb8047b156bb	2287	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
rahul_dahiya	0:fb8047b156bb	2288	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
rahul_dahiya	0:fb8047b156bb	2289	}
rahul_dahiya	0:fb8047b156bb	2290
rahul_dahiya	0:fb8047b156bb	2291	/*
rahul_dahiya	0:fb8047b156bb	2292	* Don't even try to read if time's out already.
rahul_dahiya	0:fb8047b156bb	2293	* This avoids by-passing the timer when repeatedly receiving messages
rahul_dahiya	0:fb8047b156bb	2294	* that will end up being dropped.
rahul_dahiya	0:fb8047b156bb	2295	*/
rahul_dahiya	0:fb8047b156bb	2296	if( ssl_check_timer( ssl ) != 0 )
rahul_dahiya	0:fb8047b156bb	2297	ret = MBEDTLS_ERR_SSL_TIMEOUT;
rahul_dahiya	0:fb8047b156bb	2298	else
rahul_dahiya	0:fb8047b156bb	2299	{
rahul_dahiya	0:fb8047b156bb	2300	len = MBEDTLS_SSL_BUFFER_LEN - ( ssl->in_hdr - ssl->in_buf );
rahul_dahiya	0:fb8047b156bb	2301
rahul_dahiya	0:fb8047b156bb	2302	if( ssl->state != MBEDTLS_SSL_HANDSHAKE_OVER )
rahul_dahiya	0:fb8047b156bb	2303	timeout = ssl->handshake->retransmit_timeout;
rahul_dahiya	0:fb8047b156bb	2304	else
rahul_dahiya	0:fb8047b156bb	2305	timeout = ssl->conf->read_timeout;
rahul_dahiya	0:fb8047b156bb	2306
rahul_dahiya	0:fb8047b156bb	2307	MBEDTLS_SSL_DEBUG_MSG( 3, ( "f_recv_timeout: %u ms", timeout ) );
rahul_dahiya	0:fb8047b156bb	2308
rahul_dahiya	0:fb8047b156bb	2309	if( ssl->f_recv_timeout != NULL )
rahul_dahiya	0:fb8047b156bb	2310	ret = ssl->f_recv_timeout( ssl->p_bio, ssl->in_hdr, len,
rahul_dahiya	0:fb8047b156bb	2311	timeout );
rahul_dahiya	0:fb8047b156bb	2312	else
rahul_dahiya	0:fb8047b156bb	2313	ret = ssl->f_recv( ssl->p_bio, ssl->in_hdr, len );
rahul_dahiya	0:fb8047b156bb	2314
rahul_dahiya	0:fb8047b156bb	2315	MBEDTLS_SSL_DEBUG_RET( 2, "ssl->f_recv(_timeout)", ret );
rahul_dahiya	0:fb8047b156bb	2316
rahul_dahiya	0:fb8047b156bb	2317	if( ret == 0 )
rahul_dahiya	0:fb8047b156bb	2318	return( MBEDTLS_ERR_SSL_CONN_EOF );
rahul_dahiya	0:fb8047b156bb	2319	}
rahul_dahiya	0:fb8047b156bb	2320
rahul_dahiya	0:fb8047b156bb	2321	if( ret == MBEDTLS_ERR_SSL_TIMEOUT )
rahul_dahiya	0:fb8047b156bb	2322	{
rahul_dahiya	0:fb8047b156bb	2323	MBEDTLS_SSL_DEBUG_MSG( 2, ( "timeout" ) );
rahul_dahiya	0:fb8047b156bb	2324	ssl_set_timer( ssl, 0 );
rahul_dahiya	0:fb8047b156bb	2325
rahul_dahiya	0:fb8047b156bb	2326	if( ssl->state != MBEDTLS_SSL_HANDSHAKE_OVER )
rahul_dahiya	0:fb8047b156bb	2327	{
rahul_dahiya	0:fb8047b156bb	2328	if( ssl_double_retransmit_timeout( ssl ) != 0 )
rahul_dahiya	0:fb8047b156bb	2329	{
rahul_dahiya	0:fb8047b156bb	2330	MBEDTLS_SSL_DEBUG_MSG( 1, ( "handshake timeout" ) );
rahul_dahiya	0:fb8047b156bb	2331	return( MBEDTLS_ERR_SSL_TIMEOUT );
rahul_dahiya	0:fb8047b156bb	2332	}
rahul_dahiya	0:fb8047b156bb	2333
rahul_dahiya	0:fb8047b156bb	2334	if( ( ret = mbedtls_ssl_resend( ssl ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	2335	{
rahul_dahiya	0:fb8047b156bb	2336	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_resend", ret );
rahul_dahiya	0:fb8047b156bb	2337	return( ret );
rahul_dahiya	0:fb8047b156bb	2338	}
rahul_dahiya	0:fb8047b156bb	2339
rahul_dahiya	0:fb8047b156bb	2340	return( MBEDTLS_ERR_SSL_WANT_READ );
rahul_dahiya	0:fb8047b156bb	2341	}
rahul_dahiya	0:fb8047b156bb	2342	#if defined(MBEDTLS_SSL_SRV_C) && defined(MBEDTLS_SSL_RENEGOTIATION)
rahul_dahiya	0:fb8047b156bb	2343	else if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER &&
rahul_dahiya	0:fb8047b156bb	2344	ssl->renego_status == MBEDTLS_SSL_RENEGOTIATION_PENDING )
rahul_dahiya	0:fb8047b156bb	2345	{
rahul_dahiya	0:fb8047b156bb	2346	if( ( ret = ssl_resend_hello_request( ssl ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	2347	{
rahul_dahiya	0:fb8047b156bb	2348	MBEDTLS_SSL_DEBUG_RET( 1, "ssl_resend_hello_request", ret );
rahul_dahiya	0:fb8047b156bb	2349	return( ret );
rahul_dahiya	0:fb8047b156bb	2350	}
rahul_dahiya	0:fb8047b156bb	2351
rahul_dahiya	0:fb8047b156bb	2352	return( MBEDTLS_ERR_SSL_WANT_READ );
rahul_dahiya	0:fb8047b156bb	2353	}
rahul_dahiya	0:fb8047b156bb	2354	#endif /* MBEDTLS_SSL_SRV_C && MBEDTLS_SSL_RENEGOTIATION */
rahul_dahiya	0:fb8047b156bb	2355	}
rahul_dahiya	0:fb8047b156bb	2356
rahul_dahiya	0:fb8047b156bb	2357	if( ret < 0 )
rahul_dahiya	0:fb8047b156bb	2358	return( ret );
rahul_dahiya	0:fb8047b156bb	2359
rahul_dahiya	0:fb8047b156bb	2360	ssl->in_left = ret;
rahul_dahiya	0:fb8047b156bb	2361	}
rahul_dahiya	0:fb8047b156bb	2362	else
rahul_dahiya	0:fb8047b156bb	2363	#endif
rahul_dahiya	0:fb8047b156bb	2364	{
rahul_dahiya	0:fb8047b156bb	2365	MBEDTLS_SSL_DEBUG_MSG( 2, ( "in_left: %d, nb_want: %d",
rahul_dahiya	0:fb8047b156bb	2366	ssl->in_left, nb_want ) );
rahul_dahiya	0:fb8047b156bb	2367
rahul_dahiya	0:fb8047b156bb	2368	while( ssl->in_left < nb_want )
rahul_dahiya	0:fb8047b156bb	2369	{
rahul_dahiya	0:fb8047b156bb	2370	len = nb_want - ssl->in_left;
rahul_dahiya	0:fb8047b156bb	2371
rahul_dahiya	0:fb8047b156bb	2372	if( ssl_check_timer( ssl ) != 0 )
rahul_dahiya	0:fb8047b156bb	2373	ret = MBEDTLS_ERR_SSL_TIMEOUT;
rahul_dahiya	0:fb8047b156bb	2374	else
rahul_dahiya	0:fb8047b156bb	2375	{
rahul_dahiya	0:fb8047b156bb	2376	if( ssl->f_recv_timeout != NULL )
rahul_dahiya	0:fb8047b156bb	2377	{
rahul_dahiya	0:fb8047b156bb	2378	ret = ssl->f_recv_timeout( ssl->p_bio,
rahul_dahiya	0:fb8047b156bb	2379	ssl->in_hdr + ssl->in_left, len,
rahul_dahiya	0:fb8047b156bb	2380	ssl->conf->read_timeout );
rahul_dahiya	0:fb8047b156bb	2381	}
rahul_dahiya	0:fb8047b156bb	2382	else
rahul_dahiya	0:fb8047b156bb	2383	{
rahul_dahiya	0:fb8047b156bb	2384	ret = ssl->f_recv( ssl->p_bio,
rahul_dahiya	0:fb8047b156bb	2385	ssl->in_hdr + ssl->in_left, len );
rahul_dahiya	0:fb8047b156bb	2386	}
rahul_dahiya	0:fb8047b156bb	2387	}
rahul_dahiya	0:fb8047b156bb	2388
rahul_dahiya	0:fb8047b156bb	2389	MBEDTLS_SSL_DEBUG_MSG( 2, ( "in_left: %d, nb_want: %d",
rahul_dahiya	0:fb8047b156bb	2390	ssl->in_left, nb_want ) );
rahul_dahiya	0:fb8047b156bb	2391	MBEDTLS_SSL_DEBUG_RET( 2, "ssl->f_recv(_timeout)", ret );
rahul_dahiya	0:fb8047b156bb	2392
rahul_dahiya	0:fb8047b156bb	2393	if( ret == 0 )
rahul_dahiya	0:fb8047b156bb	2394	return( MBEDTLS_ERR_SSL_CONN_EOF );
rahul_dahiya	0:fb8047b156bb	2395
rahul_dahiya	0:fb8047b156bb	2396	if( ret < 0 )
rahul_dahiya	0:fb8047b156bb	2397	return( ret );
rahul_dahiya	0:fb8047b156bb	2398
rahul_dahiya	0:fb8047b156bb	2399	ssl->in_left += ret;
rahul_dahiya	0:fb8047b156bb	2400	}
rahul_dahiya	0:fb8047b156bb	2401	}
rahul_dahiya	0:fb8047b156bb	2402
rahul_dahiya	0:fb8047b156bb	2403	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= fetch input" ) );
rahul_dahiya	0:fb8047b156bb	2404
rahul_dahiya	0:fb8047b156bb	2405	return( 0 );
rahul_dahiya	0:fb8047b156bb	2406	}
rahul_dahiya	0:fb8047b156bb	2407
rahul_dahiya	0:fb8047b156bb	2408	/*
rahul_dahiya	0:fb8047b156bb	2409	* Flush any data not yet written
rahul_dahiya	0:fb8047b156bb	2410	*/
rahul_dahiya	0:fb8047b156bb	2411	int mbedtls_ssl_flush_output( mbedtls_ssl_context *ssl )
rahul_dahiya	0:fb8047b156bb	2412	{
rahul_dahiya	0:fb8047b156bb	2413	int ret;
rahul_dahiya	0:fb8047b156bb	2414	unsigned char *buf, i;
rahul_dahiya	0:fb8047b156bb	2415
rahul_dahiya	0:fb8047b156bb	2416	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> flush output" ) );
rahul_dahiya	0:fb8047b156bb	2417
rahul_dahiya	0:fb8047b156bb	2418	if( ssl->f_send == NULL )
rahul_dahiya	0:fb8047b156bb	2419	{
rahul_dahiya	0:fb8047b156bb	2420	MBEDTLS_SSL_DEBUG_MSG( 1, ( "Bad usage of mbedtls_ssl_set_bio() "
rahul_dahiya	0:fb8047b156bb	2421	"or mbedtls_ssl_set_bio()" ) );
rahul_dahiya	0:fb8047b156bb	2422	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
rahul_dahiya	0:fb8047b156bb	2423	}
rahul_dahiya	0:fb8047b156bb	2424
rahul_dahiya	0:fb8047b156bb	2425	/* Avoid incrementing counter if data is flushed */
rahul_dahiya	0:fb8047b156bb	2426	if( ssl->out_left == 0 )
rahul_dahiya	0:fb8047b156bb	2427	{
rahul_dahiya	0:fb8047b156bb	2428	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= flush output" ) );
rahul_dahiya	0:fb8047b156bb	2429	return( 0 );
rahul_dahiya	0:fb8047b156bb	2430	}
rahul_dahiya	0:fb8047b156bb	2431
rahul_dahiya	0:fb8047b156bb	2432	while( ssl->out_left > 0 )
rahul_dahiya	0:fb8047b156bb	2433	{
rahul_dahiya	0:fb8047b156bb	2434	MBEDTLS_SSL_DEBUG_MSG( 2, ( "message length: %d, out_left: %d",
rahul_dahiya	0:fb8047b156bb	2435	mbedtls_ssl_hdr_len( ssl ) + ssl->out_msglen, ssl->out_left ) );
rahul_dahiya	0:fb8047b156bb	2436
rahul_dahiya	0:fb8047b156bb	2437	buf = ssl->out_hdr + mbedtls_ssl_hdr_len( ssl ) +
rahul_dahiya	0:fb8047b156bb	2438	ssl->out_msglen - ssl->out_left;
rahul_dahiya	0:fb8047b156bb	2439	ret = ssl->f_send( ssl->p_bio, buf, ssl->out_left );
rahul_dahiya	0:fb8047b156bb	2440
rahul_dahiya	0:fb8047b156bb	2441	MBEDTLS_SSL_DEBUG_RET( 2, "ssl->f_send", ret );
rahul_dahiya	0:fb8047b156bb	2442
rahul_dahiya	0:fb8047b156bb	2443	if( ret <= 0 )
rahul_dahiya	0:fb8047b156bb	2444	return( ret );
rahul_dahiya	0:fb8047b156bb	2445
rahul_dahiya	0:fb8047b156bb	2446	ssl->out_left -= ret;
rahul_dahiya	0:fb8047b156bb	2447	}
rahul_dahiya	0:fb8047b156bb	2448
rahul_dahiya	0:fb8047b156bb	2449	for( i = 8; i > ssl_ep_len( ssl ); i-- )
rahul_dahiya	0:fb8047b156bb	2450	if( ++ssl->out_ctr[i - 1] != 0 )
rahul_dahiya	0:fb8047b156bb	2451	break;
rahul_dahiya	0:fb8047b156bb	2452
rahul_dahiya	0:fb8047b156bb	2453	/* The loop goes to its end iff the counter is wrapping */
rahul_dahiya	0:fb8047b156bb	2454	if( i == ssl_ep_len( ssl ) )
rahul_dahiya	0:fb8047b156bb	2455	{
rahul_dahiya	0:fb8047b156bb	2456	MBEDTLS_SSL_DEBUG_MSG( 1, ( "outgoing message counter would wrap" ) );
rahul_dahiya	0:fb8047b156bb	2457	return( MBEDTLS_ERR_SSL_COUNTER_WRAPPING );
rahul_dahiya	0:fb8047b156bb	2458	}
rahul_dahiya	0:fb8047b156bb	2459
rahul_dahiya	0:fb8047b156bb	2460	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= flush output" ) );
rahul_dahiya	0:fb8047b156bb	2461
rahul_dahiya	0:fb8047b156bb	2462	return( 0 );
rahul_dahiya	0:fb8047b156bb	2463	}
rahul_dahiya	0:fb8047b156bb	2464
rahul_dahiya	0:fb8047b156bb	2465	/*
rahul_dahiya	0:fb8047b156bb	2466	* Functions to handle the DTLS retransmission state machine
rahul_dahiya	0:fb8047b156bb	2467	*/
rahul_dahiya	0:fb8047b156bb	2468	#if defined(MBEDTLS_SSL_PROTO_DTLS)
rahul_dahiya	0:fb8047b156bb	2469	/*
rahul_dahiya	0:fb8047b156bb	2470	* Append current handshake message to current outgoing flight
rahul_dahiya	0:fb8047b156bb	2471	*/
rahul_dahiya	0:fb8047b156bb	2472	static int ssl_flight_append( mbedtls_ssl_context *ssl )
rahul_dahiya	0:fb8047b156bb	2473	{
rahul_dahiya	0:fb8047b156bb	2474	mbedtls_ssl_flight_item *msg;
rahul_dahiya	0:fb8047b156bb	2475
rahul_dahiya	0:fb8047b156bb	2476	/* Allocate space for current message */
rahul_dahiya	0:fb8047b156bb	2477	if( ( msg = mbedtls_calloc( 1, sizeof( mbedtls_ssl_flight_item ) ) ) == NULL )
rahul_dahiya	0:fb8047b156bb	2478	{
rahul_dahiya	0:fb8047b156bb	2479	MBEDTLS_SSL_DEBUG_MSG( 1, ( "alloc %d bytes failed",
rahul_dahiya	0:fb8047b156bb	2480	sizeof( mbedtls_ssl_flight_item ) ) );
rahul_dahiya	0:fb8047b156bb	2481	return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
rahul_dahiya	0:fb8047b156bb	2482	}
rahul_dahiya	0:fb8047b156bb	2483
rahul_dahiya	0:fb8047b156bb	2484	if( ( msg->p = mbedtls_calloc( 1, ssl->out_msglen ) ) == NULL )
rahul_dahiya	0:fb8047b156bb	2485	{
rahul_dahiya	0:fb8047b156bb	2486	MBEDTLS_SSL_DEBUG_MSG( 1, ( "alloc %d bytes failed", ssl->out_msglen ) );
rahul_dahiya	0:fb8047b156bb	2487	mbedtls_free( msg );
rahul_dahiya	0:fb8047b156bb	2488	return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
rahul_dahiya	0:fb8047b156bb	2489	}
rahul_dahiya	0:fb8047b156bb	2490
rahul_dahiya	0:fb8047b156bb	2491	/* Copy current handshake message with headers */
rahul_dahiya	0:fb8047b156bb	2492	memcpy( msg->p, ssl->out_msg, ssl->out_msglen );
rahul_dahiya	0:fb8047b156bb	2493	msg->len = ssl->out_msglen;
rahul_dahiya	0:fb8047b156bb	2494	msg->type = ssl->out_msgtype;
rahul_dahiya	0:fb8047b156bb	2495	msg->next = NULL;
rahul_dahiya	0:fb8047b156bb	2496
rahul_dahiya	0:fb8047b156bb	2497	/* Append to the current flight */
rahul_dahiya	0:fb8047b156bb	2498	if( ssl->handshake->flight == NULL )
rahul_dahiya	0:fb8047b156bb	2499	ssl->handshake->flight = msg;
rahul_dahiya	0:fb8047b156bb	2500	else
rahul_dahiya	0:fb8047b156bb	2501	{
rahul_dahiya	0:fb8047b156bb	2502	mbedtls_ssl_flight_item *cur = ssl->handshake->flight;
rahul_dahiya	0:fb8047b156bb	2503	while( cur->next != NULL )
rahul_dahiya	0:fb8047b156bb	2504	cur = cur->next;
rahul_dahiya	0:fb8047b156bb	2505	cur->next = msg;
rahul_dahiya	0:fb8047b156bb	2506	}
rahul_dahiya	0:fb8047b156bb	2507
rahul_dahiya	0:fb8047b156bb	2508	return( 0 );
rahul_dahiya	0:fb8047b156bb	2509	}
rahul_dahiya	0:fb8047b156bb	2510
rahul_dahiya	0:fb8047b156bb	2511	/*
rahul_dahiya	0:fb8047b156bb	2512	* Free the current flight of handshake messages
rahul_dahiya	0:fb8047b156bb	2513	*/
rahul_dahiya	0:fb8047b156bb	2514	static void ssl_flight_free( mbedtls_ssl_flight_item *flight )
rahul_dahiya	0:fb8047b156bb	2515	{
rahul_dahiya	0:fb8047b156bb	2516	mbedtls_ssl_flight_item *cur = flight;
rahul_dahiya	0:fb8047b156bb	2517	mbedtls_ssl_flight_item *next;
rahul_dahiya	0:fb8047b156bb	2518
rahul_dahiya	0:fb8047b156bb	2519	while( cur != NULL )
rahul_dahiya	0:fb8047b156bb	2520	{
rahul_dahiya	0:fb8047b156bb	2521	next = cur->next;
rahul_dahiya	0:fb8047b156bb	2522
rahul_dahiya	0:fb8047b156bb	2523	mbedtls_free( cur->p );
rahul_dahiya	0:fb8047b156bb	2524	mbedtls_free( cur );
rahul_dahiya	0:fb8047b156bb	2525
rahul_dahiya	0:fb8047b156bb	2526	cur = next;
rahul_dahiya	0:fb8047b156bb	2527	}
rahul_dahiya	0:fb8047b156bb	2528	}
rahul_dahiya	0:fb8047b156bb	2529
rahul_dahiya	0:fb8047b156bb	2530	#if defined(MBEDTLS_SSL_DTLS_ANTI_REPLAY)
rahul_dahiya	0:fb8047b156bb	2531	static void ssl_dtls_replay_reset( mbedtls_ssl_context *ssl );
rahul_dahiya	0:fb8047b156bb	2532	#endif
rahul_dahiya	0:fb8047b156bb	2533
rahul_dahiya	0:fb8047b156bb	2534	/*
rahul_dahiya	0:fb8047b156bb	2535	* Swap transform_out and out_ctr with the alternative ones
rahul_dahiya	0:fb8047b156bb	2536	*/
rahul_dahiya	0:fb8047b156bb	2537	static void ssl_swap_epochs( mbedtls_ssl_context *ssl )
rahul_dahiya	0:fb8047b156bb	2538	{
rahul_dahiya	0:fb8047b156bb	2539	mbedtls_ssl_transform *tmp_transform;
rahul_dahiya	0:fb8047b156bb	2540	unsigned char tmp_out_ctr[8];
rahul_dahiya	0:fb8047b156bb	2541
rahul_dahiya	0:fb8047b156bb	2542	if( ssl->transform_out == ssl->handshake->alt_transform_out )
rahul_dahiya	0:fb8047b156bb	2543	{
rahul_dahiya	0:fb8047b156bb	2544	MBEDTLS_SSL_DEBUG_MSG( 3, ( "skip swap epochs" ) );
rahul_dahiya	0:fb8047b156bb	2545	return;
rahul_dahiya	0:fb8047b156bb	2546	}
rahul_dahiya	0:fb8047b156bb	2547
rahul_dahiya	0:fb8047b156bb	2548	MBEDTLS_SSL_DEBUG_MSG( 3, ( "swap epochs" ) );
rahul_dahiya	0:fb8047b156bb	2549
rahul_dahiya	0:fb8047b156bb	2550	/* Swap transforms */
rahul_dahiya	0:fb8047b156bb	2551	tmp_transform = ssl->transform_out;
rahul_dahiya	0:fb8047b156bb	2552	ssl->transform_out = ssl->handshake->alt_transform_out;
rahul_dahiya	0:fb8047b156bb	2553	ssl->handshake->alt_transform_out = tmp_transform;
rahul_dahiya	0:fb8047b156bb	2554
rahul_dahiya	0:fb8047b156bb	2555	/* Swap epoch + sequence_number */
rahul_dahiya	0:fb8047b156bb	2556	memcpy( tmp_out_ctr, ssl->out_ctr, 8 );
rahul_dahiya	0:fb8047b156bb	2557	memcpy( ssl->out_ctr, ssl->handshake->alt_out_ctr, 8 );
rahul_dahiya	0:fb8047b156bb	2558	memcpy( ssl->handshake->alt_out_ctr, tmp_out_ctr, 8 );
rahul_dahiya	0:fb8047b156bb	2559
rahul_dahiya	0:fb8047b156bb	2560	/* Adjust to the newly activated transform */
rahul_dahiya	0:fb8047b156bb	2561	if( ssl->transform_out != NULL &&
rahul_dahiya	0:fb8047b156bb	2562	ssl->minor_ver >= MBEDTLS_SSL_MINOR_VERSION_2 )
rahul_dahiya	0:fb8047b156bb	2563	{
rahul_dahiya	0:fb8047b156bb	2564	ssl->out_msg = ssl->out_iv + ssl->transform_out->ivlen -
rahul_dahiya	0:fb8047b156bb	2565	ssl->transform_out->fixed_ivlen;
rahul_dahiya	0:fb8047b156bb	2566	}
rahul_dahiya	0:fb8047b156bb	2567	else
rahul_dahiya	0:fb8047b156bb	2568	ssl->out_msg = ssl->out_iv;
rahul_dahiya	0:fb8047b156bb	2569
rahul_dahiya	0:fb8047b156bb	2570	#if defined(MBEDTLS_SSL_HW_RECORD_ACCEL)
rahul_dahiya	0:fb8047b156bb	2571	if( mbedtls_ssl_hw_record_activate != NULL )
rahul_dahiya	0:fb8047b156bb	2572	{
rahul_dahiya	0:fb8047b156bb	2573	if( ( ret = mbedtls_ssl_hw_record_activate( ssl, MBEDTLS_SSL_CHANNEL_OUTBOUND ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	2574	{
rahul_dahiya	0:fb8047b156bb	2575	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_hw_record_activate", ret );
rahul_dahiya	0:fb8047b156bb	2576	return( MBEDTLS_ERR_SSL_HW_ACCEL_FAILED );
rahul_dahiya	0:fb8047b156bb	2577	}
rahul_dahiya	0:fb8047b156bb	2578	}
rahul_dahiya	0:fb8047b156bb	2579	#endif
rahul_dahiya	0:fb8047b156bb	2580	}
rahul_dahiya	0:fb8047b156bb	2581
rahul_dahiya	0:fb8047b156bb	2582	/*
rahul_dahiya	0:fb8047b156bb	2583	* Retransmit the current flight of messages.
rahul_dahiya	0:fb8047b156bb	2584	*
rahul_dahiya	0:fb8047b156bb	2585	* Need to remember the current message in case flush_output returns
rahul_dahiya	0:fb8047b156bb	2586	* WANT_WRITE, causing us to exit this function and come back later.
rahul_dahiya	0:fb8047b156bb	2587	* This function must be called until state is no longer SENDING.
rahul_dahiya	0:fb8047b156bb	2588	*/
rahul_dahiya	0:fb8047b156bb	2589	int mbedtls_ssl_resend( mbedtls_ssl_context *ssl )
rahul_dahiya	0:fb8047b156bb	2590	{
rahul_dahiya	0:fb8047b156bb	2591	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> mbedtls_ssl_resend" ) );
rahul_dahiya	0:fb8047b156bb	2592
rahul_dahiya	0:fb8047b156bb	2593	if( ssl->handshake->retransmit_state != MBEDTLS_SSL_RETRANS_SENDING )
rahul_dahiya	0:fb8047b156bb	2594	{
rahul_dahiya	0:fb8047b156bb	2595	MBEDTLS_SSL_DEBUG_MSG( 2, ( "initialise resending" ) );
rahul_dahiya	0:fb8047b156bb	2596
rahul_dahiya	0:fb8047b156bb	2597	ssl->handshake->cur_msg = ssl->handshake->flight;
rahul_dahiya	0:fb8047b156bb	2598	ssl_swap_epochs( ssl );
rahul_dahiya	0:fb8047b156bb	2599
rahul_dahiya	0:fb8047b156bb	2600	ssl->handshake->retransmit_state = MBEDTLS_SSL_RETRANS_SENDING;
rahul_dahiya	0:fb8047b156bb	2601	}
rahul_dahiya	0:fb8047b156bb	2602
rahul_dahiya	0:fb8047b156bb	2603	while( ssl->handshake->cur_msg != NULL )
rahul_dahiya	0:fb8047b156bb	2604	{
rahul_dahiya	0:fb8047b156bb	2605	int ret;
rahul_dahiya	0:fb8047b156bb	2606	mbedtls_ssl_flight_item *cur = ssl->handshake->cur_msg;
rahul_dahiya	0:fb8047b156bb	2607
rahul_dahiya	0:fb8047b156bb	2608	/* Swap epochs before sending Finished: we can't do it after
rahul_dahiya	0:fb8047b156bb	2609	* sending ChangeCipherSpec, in case write returns WANT_READ.
rahul_dahiya	0:fb8047b156bb	2610	* Must be done before copying, may change out_msg pointer */
rahul_dahiya	0:fb8047b156bb	2611	if( cur->type == MBEDTLS_SSL_MSG_HANDSHAKE &&
rahul_dahiya	0:fb8047b156bb	2612	cur->p[0] == MBEDTLS_SSL_HS_FINISHED )
rahul_dahiya	0:fb8047b156bb	2613	{
rahul_dahiya	0:fb8047b156bb	2614	ssl_swap_epochs( ssl );
rahul_dahiya	0:fb8047b156bb	2615	}
rahul_dahiya	0:fb8047b156bb	2616
rahul_dahiya	0:fb8047b156bb	2617	memcpy( ssl->out_msg, cur->p, cur->len );
rahul_dahiya	0:fb8047b156bb	2618	ssl->out_msglen = cur->len;
rahul_dahiya	0:fb8047b156bb	2619	ssl->out_msgtype = cur->type;
rahul_dahiya	0:fb8047b156bb	2620
rahul_dahiya	0:fb8047b156bb	2621	ssl->handshake->cur_msg = cur->next;
rahul_dahiya	0:fb8047b156bb	2622
rahul_dahiya	0:fb8047b156bb	2623	MBEDTLS_SSL_DEBUG_BUF( 3, "resent handshake message header", ssl->out_msg, 12 );
rahul_dahiya	0:fb8047b156bb	2624
rahul_dahiya	0:fb8047b156bb	2625	if( ( ret = mbedtls_ssl_write_record( ssl ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	2626	{
rahul_dahiya	0:fb8047b156bb	2627	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_write_record", ret );
rahul_dahiya	0:fb8047b156bb	2628	return( ret );
rahul_dahiya	0:fb8047b156bb	2629	}
rahul_dahiya	0:fb8047b156bb	2630	}
rahul_dahiya	0:fb8047b156bb	2631
rahul_dahiya	0:fb8047b156bb	2632	if( ssl->state == MBEDTLS_SSL_HANDSHAKE_OVER )
rahul_dahiya	0:fb8047b156bb	2633	ssl->handshake->retransmit_state = MBEDTLS_SSL_RETRANS_FINISHED;
rahul_dahiya	0:fb8047b156bb	2634	else
rahul_dahiya	0:fb8047b156bb	2635	{
rahul_dahiya	0:fb8047b156bb	2636	ssl->handshake->retransmit_state = MBEDTLS_SSL_RETRANS_WAITING;
rahul_dahiya	0:fb8047b156bb	2637	ssl_set_timer( ssl, ssl->handshake->retransmit_timeout );
rahul_dahiya	0:fb8047b156bb	2638	}
rahul_dahiya	0:fb8047b156bb	2639
rahul_dahiya	0:fb8047b156bb	2640	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= mbedtls_ssl_resend" ) );
rahul_dahiya	0:fb8047b156bb	2641
rahul_dahiya	0:fb8047b156bb	2642	return( 0 );
rahul_dahiya	0:fb8047b156bb	2643	}
rahul_dahiya	0:fb8047b156bb	2644
rahul_dahiya	0:fb8047b156bb	2645	/*
rahul_dahiya	0:fb8047b156bb	2646	* To be called when the last message of an incoming flight is received.
rahul_dahiya	0:fb8047b156bb	2647	*/
rahul_dahiya	0:fb8047b156bb	2648	void mbedtls_ssl_recv_flight_completed( mbedtls_ssl_context *ssl )
rahul_dahiya	0:fb8047b156bb	2649	{
rahul_dahiya	0:fb8047b156bb	2650	/* We won't need to resend that one any more */
rahul_dahiya	0:fb8047b156bb	2651	ssl_flight_free( ssl->handshake->flight );
rahul_dahiya	0:fb8047b156bb	2652	ssl->handshake->flight = NULL;
rahul_dahiya	0:fb8047b156bb	2653	ssl->handshake->cur_msg = NULL;
rahul_dahiya	0:fb8047b156bb	2654
rahul_dahiya	0:fb8047b156bb	2655	/* The next incoming flight will start with this msg_seq */
rahul_dahiya	0:fb8047b156bb	2656	ssl->handshake->in_flight_start_seq = ssl->handshake->in_msg_seq;
rahul_dahiya	0:fb8047b156bb	2657
rahul_dahiya	0:fb8047b156bb	2658	/* Cancel timer */
rahul_dahiya	0:fb8047b156bb	2659	ssl_set_timer( ssl, 0 );
rahul_dahiya	0:fb8047b156bb	2660
rahul_dahiya	0:fb8047b156bb	2661	if( ssl->in_msgtype == MBEDTLS_SSL_MSG_HANDSHAKE &&
rahul_dahiya	0:fb8047b156bb	2662	ssl->in_msg[0] == MBEDTLS_SSL_HS_FINISHED )
rahul_dahiya	0:fb8047b156bb	2663	{
rahul_dahiya	0:fb8047b156bb	2664	ssl->handshake->retransmit_state = MBEDTLS_SSL_RETRANS_FINISHED;
rahul_dahiya	0:fb8047b156bb	2665	}
rahul_dahiya	0:fb8047b156bb	2666	else
rahul_dahiya	0:fb8047b156bb	2667	ssl->handshake->retransmit_state = MBEDTLS_SSL_RETRANS_PREPARING;
rahul_dahiya	0:fb8047b156bb	2668	}
rahul_dahiya	0:fb8047b156bb	2669
rahul_dahiya	0:fb8047b156bb	2670	/*
rahul_dahiya	0:fb8047b156bb	2671	* To be called when the last message of an outgoing flight is send.
rahul_dahiya	0:fb8047b156bb	2672	*/
rahul_dahiya	0:fb8047b156bb	2673	void mbedtls_ssl_send_flight_completed( mbedtls_ssl_context *ssl )
rahul_dahiya	0:fb8047b156bb	2674	{
rahul_dahiya	0:fb8047b156bb	2675	ssl_reset_retransmit_timeout( ssl );
rahul_dahiya	0:fb8047b156bb	2676	ssl_set_timer( ssl, ssl->handshake->retransmit_timeout );
rahul_dahiya	0:fb8047b156bb	2677
rahul_dahiya	0:fb8047b156bb	2678	if( ssl->in_msgtype == MBEDTLS_SSL_MSG_HANDSHAKE &&
rahul_dahiya	0:fb8047b156bb	2679	ssl->in_msg[0] == MBEDTLS_SSL_HS_FINISHED )
rahul_dahiya	0:fb8047b156bb	2680	{
rahul_dahiya	0:fb8047b156bb	2681	ssl->handshake->retransmit_state = MBEDTLS_SSL_RETRANS_FINISHED;
rahul_dahiya	0:fb8047b156bb	2682	}
rahul_dahiya	0:fb8047b156bb	2683	else
rahul_dahiya	0:fb8047b156bb	2684	ssl->handshake->retransmit_state = MBEDTLS_SSL_RETRANS_WAITING;
rahul_dahiya	0:fb8047b156bb	2685	}
rahul_dahiya	0:fb8047b156bb	2686	#endif /* MBEDTLS_SSL_PROTO_DTLS */
rahul_dahiya	0:fb8047b156bb	2687
rahul_dahiya	0:fb8047b156bb	2688	/*
rahul_dahiya	0:fb8047b156bb	2689	* Record layer functions
rahul_dahiya	0:fb8047b156bb	2690	*/
rahul_dahiya	0:fb8047b156bb	2691
rahul_dahiya	0:fb8047b156bb	2692	/*
rahul_dahiya	0:fb8047b156bb	2693	* Write current record.
rahul_dahiya	0:fb8047b156bb	2694	* Uses ssl->out_msgtype, ssl->out_msglen and bytes at ssl->out_msg.
rahul_dahiya	0:fb8047b156bb	2695	*/
rahul_dahiya	0:fb8047b156bb	2696	int mbedtls_ssl_write_record( mbedtls_ssl_context *ssl )
rahul_dahiya	0:fb8047b156bb	2697	{
rahul_dahiya	0:fb8047b156bb	2698	int ret, done = 0, out_msg_type;
rahul_dahiya	0:fb8047b156bb	2699	size_t len = ssl->out_msglen;
rahul_dahiya	0:fb8047b156bb	2700
rahul_dahiya	0:fb8047b156bb	2701	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write record" ) );
rahul_dahiya	0:fb8047b156bb	2702
rahul_dahiya	0:fb8047b156bb	2703	#if defined(MBEDTLS_SSL_PROTO_DTLS)
rahul_dahiya	0:fb8047b156bb	2704	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM &&
rahul_dahiya	0:fb8047b156bb	2705	ssl->handshake != NULL &&
rahul_dahiya	0:fb8047b156bb	2706	ssl->handshake->retransmit_state == MBEDTLS_SSL_RETRANS_SENDING )
rahul_dahiya	0:fb8047b156bb	2707	{
rahul_dahiya	0:fb8047b156bb	2708	; /* Skip special handshake treatment when resending */
rahul_dahiya	0:fb8047b156bb	2709	}
rahul_dahiya	0:fb8047b156bb	2710	else
rahul_dahiya	0:fb8047b156bb	2711	#endif
rahul_dahiya	0:fb8047b156bb	2712	if( ssl->out_msgtype == MBEDTLS_SSL_MSG_HANDSHAKE )
rahul_dahiya	0:fb8047b156bb	2713	{
rahul_dahiya	0:fb8047b156bb	2714	out_msg_type = ssl->out_msg[0];
rahul_dahiya	0:fb8047b156bb	2715
rahul_dahiya	0:fb8047b156bb	2716	if( out_msg_type != MBEDTLS_SSL_HS_HELLO_REQUEST &&
rahul_dahiya	0:fb8047b156bb	2717	ssl->handshake == NULL )
rahul_dahiya	0:fb8047b156bb	2718	{
rahul_dahiya	0:fb8047b156bb	2719	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
rahul_dahiya	0:fb8047b156bb	2720	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
rahul_dahiya	0:fb8047b156bb	2721	}
rahul_dahiya	0:fb8047b156bb	2722
rahul_dahiya	0:fb8047b156bb	2723	ssl->out_msg[1] = (unsigned char)( ( len - 4 ) >> 16 );
rahul_dahiya	0:fb8047b156bb	2724	ssl->out_msg[2] = (unsigned char)( ( len - 4 ) >> 8 );
rahul_dahiya	0:fb8047b156bb	2725	ssl->out_msg[3] = (unsigned char)( ( len - 4 ) );
rahul_dahiya	0:fb8047b156bb	2726
rahul_dahiya	0:fb8047b156bb	2727	/*
rahul_dahiya	0:fb8047b156bb	2728	* DTLS has additional fields in the Handshake layer,
rahul_dahiya	0:fb8047b156bb	2729	* between the length field and the actual payload:
rahul_dahiya	0:fb8047b156bb	2730	* uint16 message_seq;
rahul_dahiya	0:fb8047b156bb	2731	* uint24 fragment_offset;
rahul_dahiya	0:fb8047b156bb	2732	* uint24 fragment_length;
rahul_dahiya	0:fb8047b156bb	2733	*/
rahul_dahiya	0:fb8047b156bb	2734	#if defined(MBEDTLS_SSL_PROTO_DTLS)
rahul_dahiya	0:fb8047b156bb	2735	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
rahul_dahiya	0:fb8047b156bb	2736	{
rahul_dahiya	0:fb8047b156bb	2737	/* Make room for the additional DTLS fields */
rahul_dahiya	0:fb8047b156bb	2738	memmove( ssl->out_msg + 12, ssl->out_msg + 4, len - 4 );
rahul_dahiya	0:fb8047b156bb	2739	ssl->out_msglen += 8;
rahul_dahiya	0:fb8047b156bb	2740	len += 8;
rahul_dahiya	0:fb8047b156bb	2741
rahul_dahiya	0:fb8047b156bb	2742	/* Write message_seq and update it, except for HelloRequest */
rahul_dahiya	0:fb8047b156bb	2743	if( out_msg_type != MBEDTLS_SSL_HS_HELLO_REQUEST )
rahul_dahiya	0:fb8047b156bb	2744	{
rahul_dahiya	0:fb8047b156bb	2745	ssl->out_msg[4] = ( ssl->handshake->out_msg_seq >> 8 ) & 0xFF;
rahul_dahiya	0:fb8047b156bb	2746	ssl->out_msg[5] = ( ssl->handshake->out_msg_seq ) & 0xFF;
rahul_dahiya	0:fb8047b156bb	2747	++( ssl->handshake->out_msg_seq );
rahul_dahiya	0:fb8047b156bb	2748	}
rahul_dahiya	0:fb8047b156bb	2749	else
rahul_dahiya	0:fb8047b156bb	2750	{
rahul_dahiya	0:fb8047b156bb	2751	ssl->out_msg[4] = 0;
rahul_dahiya	0:fb8047b156bb	2752	ssl->out_msg[5] = 0;
rahul_dahiya	0:fb8047b156bb	2753	}
rahul_dahiya	0:fb8047b156bb	2754
rahul_dahiya	0:fb8047b156bb	2755	/* We don't fragment, so frag_offset = 0 and frag_len = len */
rahul_dahiya	0:fb8047b156bb	2756	memset( ssl->out_msg + 6, 0x00, 3 );
rahul_dahiya	0:fb8047b156bb	2757	memcpy( ssl->out_msg + 9, ssl->out_msg + 1, 3 );
rahul_dahiya	0:fb8047b156bb	2758	}
rahul_dahiya	0:fb8047b156bb	2759	#endif /* MBEDTLS_SSL_PROTO_DTLS */
rahul_dahiya	0:fb8047b156bb	2760
rahul_dahiya	0:fb8047b156bb	2761	if( out_msg_type != MBEDTLS_SSL_HS_HELLO_REQUEST )
rahul_dahiya	0:fb8047b156bb	2762	ssl->handshake->update_checksum( ssl, ssl->out_msg, len );
rahul_dahiya	0:fb8047b156bb	2763	}
rahul_dahiya	0:fb8047b156bb	2764
rahul_dahiya	0:fb8047b156bb	2765	/* Save handshake and CCS messages for resending */
rahul_dahiya	0:fb8047b156bb	2766	#if defined(MBEDTLS_SSL_PROTO_DTLS)
rahul_dahiya	0:fb8047b156bb	2767	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM &&
rahul_dahiya	0:fb8047b156bb	2768	ssl->handshake != NULL &&
rahul_dahiya	0:fb8047b156bb	2769	ssl->handshake->retransmit_state != MBEDTLS_SSL_RETRANS_SENDING &&
rahul_dahiya	0:fb8047b156bb	2770	( ssl->out_msgtype == MBEDTLS_SSL_MSG_CHANGE_CIPHER_SPEC \|\|
rahul_dahiya	0:fb8047b156bb	2771	ssl->out_msgtype == MBEDTLS_SSL_MSG_HANDSHAKE ) )
rahul_dahiya	0:fb8047b156bb	2772	{
rahul_dahiya	0:fb8047b156bb	2773	if( ( ret = ssl_flight_append( ssl ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	2774	{
rahul_dahiya	0:fb8047b156bb	2775	MBEDTLS_SSL_DEBUG_RET( 1, "ssl_flight_append", ret );
rahul_dahiya	0:fb8047b156bb	2776	return( ret );
rahul_dahiya	0:fb8047b156bb	2777	}
rahul_dahiya	0:fb8047b156bb	2778	}
rahul_dahiya	0:fb8047b156bb	2779	#endif
rahul_dahiya	0:fb8047b156bb	2780
rahul_dahiya	0:fb8047b156bb	2781	#if defined(MBEDTLS_ZLIB_SUPPORT)
rahul_dahiya	0:fb8047b156bb	2782	if( ssl->transform_out != NULL &&
rahul_dahiya	0:fb8047b156bb	2783	ssl->session_out->compression == MBEDTLS_SSL_COMPRESS_DEFLATE )
rahul_dahiya	0:fb8047b156bb	2784	{
rahul_dahiya	0:fb8047b156bb	2785	if( ( ret = ssl_compress_buf( ssl ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	2786	{
rahul_dahiya	0:fb8047b156bb	2787	MBEDTLS_SSL_DEBUG_RET( 1, "ssl_compress_buf", ret );
rahul_dahiya	0:fb8047b156bb	2788	return( ret );
rahul_dahiya	0:fb8047b156bb	2789	}
rahul_dahiya	0:fb8047b156bb	2790
rahul_dahiya	0:fb8047b156bb	2791	len = ssl->out_msglen;
rahul_dahiya	0:fb8047b156bb	2792	}
rahul_dahiya	0:fb8047b156bb	2793	#endif /MBEDTLS_ZLIB_SUPPORT /
rahul_dahiya	0:fb8047b156bb	2794
rahul_dahiya	0:fb8047b156bb	2795	#if defined(MBEDTLS_SSL_HW_RECORD_ACCEL)
rahul_dahiya	0:fb8047b156bb	2796	if( mbedtls_ssl_hw_record_write != NULL )
rahul_dahiya	0:fb8047b156bb	2797	{
rahul_dahiya	0:fb8047b156bb	2798	MBEDTLS_SSL_DEBUG_MSG( 2, ( "going for mbedtls_ssl_hw_record_write()" ) );
rahul_dahiya	0:fb8047b156bb	2799
rahul_dahiya	0:fb8047b156bb	2800	ret = mbedtls_ssl_hw_record_write( ssl );
rahul_dahiya	0:fb8047b156bb	2801	if( ret != 0 && ret != MBEDTLS_ERR_SSL_HW_ACCEL_FALLTHROUGH )
rahul_dahiya	0:fb8047b156bb	2802	{
rahul_dahiya	0:fb8047b156bb	2803	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_hw_record_write", ret );
rahul_dahiya	0:fb8047b156bb	2804	return( MBEDTLS_ERR_SSL_HW_ACCEL_FAILED );
rahul_dahiya	0:fb8047b156bb	2805	}
rahul_dahiya	0:fb8047b156bb	2806
rahul_dahiya	0:fb8047b156bb	2807	if( ret == 0 )
rahul_dahiya	0:fb8047b156bb	2808	done = 1;
rahul_dahiya	0:fb8047b156bb	2809	}
rahul_dahiya	0:fb8047b156bb	2810	#endif /* MBEDTLS_SSL_HW_RECORD_ACCEL */
rahul_dahiya	0:fb8047b156bb	2811	if( !done )
rahul_dahiya	0:fb8047b156bb	2812	{
rahul_dahiya	0:fb8047b156bb	2813	ssl->out_hdr[0] = (unsigned char) ssl->out_msgtype;
rahul_dahiya	0:fb8047b156bb	2814	mbedtls_ssl_write_version( ssl->major_ver, ssl->minor_ver,
rahul_dahiya	0:fb8047b156bb	2815	ssl->conf->transport, ssl->out_hdr + 1 );
rahul_dahiya	0:fb8047b156bb	2816
rahul_dahiya	0:fb8047b156bb	2817	ssl->out_len[0] = (unsigned char)( len >> 8 );
rahul_dahiya	0:fb8047b156bb	2818	ssl->out_len[1] = (unsigned char)( len );
rahul_dahiya	0:fb8047b156bb	2819
rahul_dahiya	0:fb8047b156bb	2820	if( ssl->transform_out != NULL )
rahul_dahiya	0:fb8047b156bb	2821	{
rahul_dahiya	0:fb8047b156bb	2822	if( ( ret = ssl_encrypt_buf( ssl ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	2823	{
rahul_dahiya	0:fb8047b156bb	2824	MBEDTLS_SSL_DEBUG_RET( 1, "ssl_encrypt_buf", ret );
rahul_dahiya	0:fb8047b156bb	2825	return( ret );
rahul_dahiya	0:fb8047b156bb	2826	}
rahul_dahiya	0:fb8047b156bb	2827
rahul_dahiya	0:fb8047b156bb	2828	len = ssl->out_msglen;
rahul_dahiya	0:fb8047b156bb	2829	ssl->out_len[0] = (unsigned char)( len >> 8 );
rahul_dahiya	0:fb8047b156bb	2830	ssl->out_len[1] = (unsigned char)( len );
rahul_dahiya	0:fb8047b156bb	2831	}
rahul_dahiya	0:fb8047b156bb	2832
rahul_dahiya	0:fb8047b156bb	2833	ssl->out_left = mbedtls_ssl_hdr_len( ssl ) + ssl->out_msglen;
rahul_dahiya	0:fb8047b156bb	2834
rahul_dahiya	0:fb8047b156bb	2835	MBEDTLS_SSL_DEBUG_MSG( 3, ( "output record: msgtype = %d, "
rahul_dahiya	0:fb8047b156bb	2836	"version = [%d:%d], msglen = %d",
rahul_dahiya	0:fb8047b156bb	2837	ssl->out_hdr[0], ssl->out_hdr[1], ssl->out_hdr[2],
rahul_dahiya	0:fb8047b156bb	2838	( ssl->out_len[0] << 8 ) \| ssl->out_len[1] ) );
rahul_dahiya	0:fb8047b156bb	2839
rahul_dahiya	0:fb8047b156bb	2840	MBEDTLS_SSL_DEBUG_BUF( 4, "output record sent to network",
rahul_dahiya	0:fb8047b156bb	2841	ssl->out_hdr, mbedtls_ssl_hdr_len( ssl ) + ssl->out_msglen );
rahul_dahiya	0:fb8047b156bb	2842	}
rahul_dahiya	0:fb8047b156bb	2843
rahul_dahiya	0:fb8047b156bb	2844	if( ( ret = mbedtls_ssl_flush_output( ssl ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	2845	{
rahul_dahiya	0:fb8047b156bb	2846	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_flush_output", ret );
rahul_dahiya	0:fb8047b156bb	2847	return( ret );
rahul_dahiya	0:fb8047b156bb	2848	}
rahul_dahiya	0:fb8047b156bb	2849
rahul_dahiya	0:fb8047b156bb	2850	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= write record" ) );
rahul_dahiya	0:fb8047b156bb	2851
rahul_dahiya	0:fb8047b156bb	2852	return( 0 );
rahul_dahiya	0:fb8047b156bb	2853	}
rahul_dahiya	0:fb8047b156bb	2854
rahul_dahiya	0:fb8047b156bb	2855	#if defined(MBEDTLS_SSL_PROTO_DTLS)
rahul_dahiya	0:fb8047b156bb	2856	/*
rahul_dahiya	0:fb8047b156bb	2857	* Mark bits in bitmask (used for DTLS HS reassembly)
rahul_dahiya	0:fb8047b156bb	2858	*/
rahul_dahiya	0:fb8047b156bb	2859	static void ssl_bitmask_set( unsigned char *mask, size_t offset, size_t len )
rahul_dahiya	0:fb8047b156bb	2860	{
rahul_dahiya	0:fb8047b156bb	2861	unsigned int start_bits, end_bits;
rahul_dahiya	0:fb8047b156bb	2862
rahul_dahiya	0:fb8047b156bb	2863	start_bits = 8 - ( offset % 8 );
rahul_dahiya	0:fb8047b156bb	2864	if( start_bits != 8 )
rahul_dahiya	0:fb8047b156bb	2865	{
rahul_dahiya	0:fb8047b156bb	2866	size_t first_byte_idx = offset / 8;
rahul_dahiya	0:fb8047b156bb	2867
rahul_dahiya	0:fb8047b156bb	2868	/* Special case */
rahul_dahiya	0:fb8047b156bb	2869	if( len <= start_bits )
rahul_dahiya	0:fb8047b156bb	2870	{
rahul_dahiya	0:fb8047b156bb	2871	for( ; len != 0; len-- )
rahul_dahiya	0:fb8047b156bb	2872	mask[first_byte_idx] \|= 1 << ( start_bits - len );
rahul_dahiya	0:fb8047b156bb	2873
rahul_dahiya	0:fb8047b156bb	2874	/* Avoid potential issues with offset or len becoming invalid */
rahul_dahiya	0:fb8047b156bb	2875	return;
rahul_dahiya	0:fb8047b156bb	2876	}
rahul_dahiya	0:fb8047b156bb	2877
rahul_dahiya	0:fb8047b156bb	2878	offset += start_bits; /* Now offset % 8 == 0 */
rahul_dahiya	0:fb8047b156bb	2879	len -= start_bits;
rahul_dahiya	0:fb8047b156bb	2880
rahul_dahiya	0:fb8047b156bb	2881	for( ; start_bits != 0; start_bits-- )
rahul_dahiya	0:fb8047b156bb	2882	mask[first_byte_idx] \|= 1 << ( start_bits - 1 );
rahul_dahiya	0:fb8047b156bb	2883	}
rahul_dahiya	0:fb8047b156bb	2884
rahul_dahiya	0:fb8047b156bb	2885	end_bits = len % 8;
rahul_dahiya	0:fb8047b156bb	2886	if( end_bits != 0 )
rahul_dahiya	0:fb8047b156bb	2887	{
rahul_dahiya	0:fb8047b156bb	2888	size_t last_byte_idx = ( offset + len ) / 8;
rahul_dahiya	0:fb8047b156bb	2889
rahul_dahiya	0:fb8047b156bb	2890	len -= end_bits; /* Now len % 8 == 0 */
rahul_dahiya	0:fb8047b156bb	2891
rahul_dahiya	0:fb8047b156bb	2892	for( ; end_bits != 0; end_bits-- )
rahul_dahiya	0:fb8047b156bb	2893	mask[last_byte_idx] \|= 1 << ( 8 - end_bits );
rahul_dahiya	0:fb8047b156bb	2894	}
rahul_dahiya	0:fb8047b156bb	2895
rahul_dahiya	0:fb8047b156bb	2896	memset( mask + offset / 8, 0xFF, len / 8 );
rahul_dahiya	0:fb8047b156bb	2897	}
rahul_dahiya	0:fb8047b156bb	2898
rahul_dahiya	0:fb8047b156bb	2899	/*
rahul_dahiya	0:fb8047b156bb	2900	* Check that bitmask is full
rahul_dahiya	0:fb8047b156bb	2901	*/
rahul_dahiya	0:fb8047b156bb	2902	static int ssl_bitmask_check( unsigned char *mask, size_t len )
rahul_dahiya	0:fb8047b156bb	2903	{
rahul_dahiya	0:fb8047b156bb	2904	size_t i;
rahul_dahiya	0:fb8047b156bb	2905
rahul_dahiya	0:fb8047b156bb	2906	for( i = 0; i < len / 8; i++ )
rahul_dahiya	0:fb8047b156bb	2907	if( mask[i] != 0xFF )
rahul_dahiya	0:fb8047b156bb	2908	return( -1 );
rahul_dahiya	0:fb8047b156bb	2909
rahul_dahiya	0:fb8047b156bb	2910	for( i = 0; i < len % 8; i++ )
rahul_dahiya	0:fb8047b156bb	2911	if( ( mask[len / 8] & ( 1 << ( 7 - i ) ) ) == 0 )
rahul_dahiya	0:fb8047b156bb	2912	return( -1 );
rahul_dahiya	0:fb8047b156bb	2913
rahul_dahiya	0:fb8047b156bb	2914	return( 0 );
rahul_dahiya	0:fb8047b156bb	2915	}
rahul_dahiya	0:fb8047b156bb	2916
rahul_dahiya	0:fb8047b156bb	2917	/*
rahul_dahiya	0:fb8047b156bb	2918	* Reassemble fragmented DTLS handshake messages.
rahul_dahiya	0:fb8047b156bb	2919	*
rahul_dahiya	0:fb8047b156bb	2920	* Use a temporary buffer for reassembly, divided in two parts:
rahul_dahiya	0:fb8047b156bb	2921	* - the first holds the reassembled message (including handshake header),
rahul_dahiya	0:fb8047b156bb	2922	* - the second holds a bitmask indicating which parts of the message
rahul_dahiya	0:fb8047b156bb	2923	* (excluding headers) have been received so far.
rahul_dahiya	0:fb8047b156bb	2924	*/
rahul_dahiya	0:fb8047b156bb	2925	static int ssl_reassemble_dtls_handshake( mbedtls_ssl_context *ssl )
rahul_dahiya	0:fb8047b156bb	2926	{
rahul_dahiya	0:fb8047b156bb	2927	unsigned char msg, bitmask;
rahul_dahiya	0:fb8047b156bb	2928	size_t frag_len, frag_off;
rahul_dahiya	0:fb8047b156bb	2929	size_t msg_len = ssl->in_hslen - 12; /* Without headers */
rahul_dahiya	0:fb8047b156bb	2930
rahul_dahiya	0:fb8047b156bb	2931	if( ssl->handshake == NULL )
rahul_dahiya	0:fb8047b156bb	2932	{
rahul_dahiya	0:fb8047b156bb	2933	MBEDTLS_SSL_DEBUG_MSG( 1, ( "not supported outside handshake (for now)" ) );
rahul_dahiya	0:fb8047b156bb	2934	return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE );
rahul_dahiya	0:fb8047b156bb	2935	}
rahul_dahiya	0:fb8047b156bb	2936
rahul_dahiya	0:fb8047b156bb	2937	/*
rahul_dahiya	0:fb8047b156bb	2938	* For first fragment, check size and allocate buffer
rahul_dahiya	0:fb8047b156bb	2939	*/
rahul_dahiya	0:fb8047b156bb	2940	if( ssl->handshake->hs_msg == NULL )
rahul_dahiya	0:fb8047b156bb	2941	{
rahul_dahiya	0:fb8047b156bb	2942	size_t alloc_len;
rahul_dahiya	0:fb8047b156bb	2943
rahul_dahiya	0:fb8047b156bb	2944	MBEDTLS_SSL_DEBUG_MSG( 2, ( "initialize reassembly, total length = %d",
rahul_dahiya	0:fb8047b156bb	2945	msg_len ) );
rahul_dahiya	0:fb8047b156bb	2946
rahul_dahiya	0:fb8047b156bb	2947	if( ssl->in_hslen > MBEDTLS_SSL_MAX_CONTENT_LEN )
rahul_dahiya	0:fb8047b156bb	2948	{
rahul_dahiya	0:fb8047b156bb	2949	MBEDTLS_SSL_DEBUG_MSG( 1, ( "handshake message too large" ) );
rahul_dahiya	0:fb8047b156bb	2950	return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE );
rahul_dahiya	0:fb8047b156bb	2951	}
rahul_dahiya	0:fb8047b156bb	2952
rahul_dahiya	0:fb8047b156bb	2953	/* The bitmask needs one bit per byte of message excluding header */
rahul_dahiya	0:fb8047b156bb	2954	alloc_len = 12 + msg_len + msg_len / 8 + ( msg_len % 8 != 0 );
rahul_dahiya	0:fb8047b156bb	2955
rahul_dahiya	0:fb8047b156bb	2956	ssl->handshake->hs_msg = mbedtls_calloc( 1, alloc_len );
rahul_dahiya	0:fb8047b156bb	2957	if( ssl->handshake->hs_msg == NULL )
rahul_dahiya	0:fb8047b156bb	2958	{
rahul_dahiya	0:fb8047b156bb	2959	MBEDTLS_SSL_DEBUG_MSG( 1, ( "alloc failed (%d bytes)", alloc_len ) );
rahul_dahiya	0:fb8047b156bb	2960	return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
rahul_dahiya	0:fb8047b156bb	2961	}
rahul_dahiya	0:fb8047b156bb	2962
rahul_dahiya	0:fb8047b156bb	2963	/* Prepare final header: copy msg_type, length and message_seq,
rahul_dahiya	0:fb8047b156bb	2964	* then add standardised fragment_offset and fragment_length */
rahul_dahiya	0:fb8047b156bb	2965	memcpy( ssl->handshake->hs_msg, ssl->in_msg, 6 );
rahul_dahiya	0:fb8047b156bb	2966	memset( ssl->handshake->hs_msg + 6, 0, 3 );
rahul_dahiya	0:fb8047b156bb	2967	memcpy( ssl->handshake->hs_msg + 9,
rahul_dahiya	0:fb8047b156bb	2968	ssl->handshake->hs_msg + 1, 3 );
rahul_dahiya	0:fb8047b156bb	2969	}
rahul_dahiya	0:fb8047b156bb	2970	else
rahul_dahiya	0:fb8047b156bb	2971	{
rahul_dahiya	0:fb8047b156bb	2972	/* Make sure msg_type and length are consistent */
rahul_dahiya	0:fb8047b156bb	2973	if( memcmp( ssl->handshake->hs_msg, ssl->in_msg, 4 ) != 0 )
rahul_dahiya	0:fb8047b156bb	2974	{
rahul_dahiya	0:fb8047b156bb	2975	MBEDTLS_SSL_DEBUG_MSG( 1, ( "fragment header mismatch" ) );
rahul_dahiya	0:fb8047b156bb	2976	return( MBEDTLS_ERR_SSL_INVALID_RECORD );
rahul_dahiya	0:fb8047b156bb	2977	}
rahul_dahiya	0:fb8047b156bb	2978	}
rahul_dahiya	0:fb8047b156bb	2979
rahul_dahiya	0:fb8047b156bb	2980	msg = ssl->handshake->hs_msg + 12;
rahul_dahiya	0:fb8047b156bb	2981	bitmask = msg + msg_len;
rahul_dahiya	0:fb8047b156bb	2982
rahul_dahiya	0:fb8047b156bb	2983	/*
rahul_dahiya	0:fb8047b156bb	2984	* Check and copy current fragment
rahul_dahiya	0:fb8047b156bb	2985	*/
rahul_dahiya	0:fb8047b156bb	2986	frag_off = ( ssl->in_msg[6] << 16 ) \|
rahul_dahiya	0:fb8047b156bb	2987	( ssl->in_msg[7] << 8 ) \|
rahul_dahiya	0:fb8047b156bb	2988	ssl->in_msg[8];
rahul_dahiya	0:fb8047b156bb	2989	frag_len = ( ssl->in_msg[9] << 16 ) \|
rahul_dahiya	0:fb8047b156bb	2990	( ssl->in_msg[10] << 8 ) \|
rahul_dahiya	0:fb8047b156bb	2991	ssl->in_msg[11];
rahul_dahiya	0:fb8047b156bb	2992
rahul_dahiya	0:fb8047b156bb	2993	if( frag_off + frag_len > msg_len )
rahul_dahiya	0:fb8047b156bb	2994	{
rahul_dahiya	0:fb8047b156bb	2995	MBEDTLS_SSL_DEBUG_MSG( 1, ( "invalid fragment offset/len: %d + %d > %d",
rahul_dahiya	0:fb8047b156bb	2996	frag_off, frag_len, msg_len ) );
rahul_dahiya	0:fb8047b156bb	2997	return( MBEDTLS_ERR_SSL_INVALID_RECORD );
rahul_dahiya	0:fb8047b156bb	2998	}
rahul_dahiya	0:fb8047b156bb	2999
rahul_dahiya	0:fb8047b156bb	3000	if( frag_len + 12 > ssl->in_msglen )
rahul_dahiya	0:fb8047b156bb	3001	{
rahul_dahiya	0:fb8047b156bb	3002	MBEDTLS_SSL_DEBUG_MSG( 1, ( "invalid fragment length: %d + 12 > %d",
rahul_dahiya	0:fb8047b156bb	3003	frag_len, ssl->in_msglen ) );
rahul_dahiya	0:fb8047b156bb	3004	return( MBEDTLS_ERR_SSL_INVALID_RECORD );
rahul_dahiya	0:fb8047b156bb	3005	}
rahul_dahiya	0:fb8047b156bb	3006
rahul_dahiya	0:fb8047b156bb	3007	MBEDTLS_SSL_DEBUG_MSG( 2, ( "adding fragment, offset = %d, length = %d",
rahul_dahiya	0:fb8047b156bb	3008	frag_off, frag_len ) );
rahul_dahiya	0:fb8047b156bb	3009
rahul_dahiya	0:fb8047b156bb	3010	memcpy( msg + frag_off, ssl->in_msg + 12, frag_len );
rahul_dahiya	0:fb8047b156bb	3011	ssl_bitmask_set( bitmask, frag_off, frag_len );
rahul_dahiya	0:fb8047b156bb	3012
rahul_dahiya	0:fb8047b156bb	3013	/*
rahul_dahiya	0:fb8047b156bb	3014	* Do we have the complete message by now?
rahul_dahiya	0:fb8047b156bb	3015	* If yes, finalize it, else ask to read the next record.
rahul_dahiya	0:fb8047b156bb	3016	*/
rahul_dahiya	0:fb8047b156bb	3017	if( ssl_bitmask_check( bitmask, msg_len ) != 0 )
rahul_dahiya	0:fb8047b156bb	3018	{
rahul_dahiya	0:fb8047b156bb	3019	MBEDTLS_SSL_DEBUG_MSG( 2, ( "message is not complete yet" ) );
rahul_dahiya	0:fb8047b156bb	3020	return( MBEDTLS_ERR_SSL_WANT_READ );
rahul_dahiya	0:fb8047b156bb	3021	}
rahul_dahiya	0:fb8047b156bb	3022
rahul_dahiya	0:fb8047b156bb	3023	MBEDTLS_SSL_DEBUG_MSG( 2, ( "handshake message completed" ) );
rahul_dahiya	0:fb8047b156bb	3024
rahul_dahiya	0:fb8047b156bb	3025	if( frag_len + 12 < ssl->in_msglen )
rahul_dahiya	0:fb8047b156bb	3026	{
rahul_dahiya	0:fb8047b156bb	3027	/*
rahul_dahiya	0:fb8047b156bb	3028	* We'got more handshake messages in the same record.
rahul_dahiya	0:fb8047b156bb	3029	* This case is not handled now because no know implementation does
rahul_dahiya	0:fb8047b156bb	3030	* that and it's hard to test, so we prefer to fail cleanly for now.
rahul_dahiya	0:fb8047b156bb	3031	*/
rahul_dahiya	0:fb8047b156bb	3032	MBEDTLS_SSL_DEBUG_MSG( 1, ( "last fragment not alone in its record" ) );
rahul_dahiya	0:fb8047b156bb	3033	return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE );
rahul_dahiya	0:fb8047b156bb	3034	}
rahul_dahiya	0:fb8047b156bb	3035
rahul_dahiya	0:fb8047b156bb	3036	if( ssl->in_left > ssl->next_record_offset )
rahul_dahiya	0:fb8047b156bb	3037	{
rahul_dahiya	0:fb8047b156bb	3038	/*
rahul_dahiya	0:fb8047b156bb	3039	* We've got more data in the buffer after the current record,
rahul_dahiya	0:fb8047b156bb	3040	* that we don't want to overwrite. Move it before writing the
rahul_dahiya	0:fb8047b156bb	3041	* reassembled message, and adjust in_left and next_record_offset.
rahul_dahiya	0:fb8047b156bb	3042	*/
rahul_dahiya	0:fb8047b156bb	3043	unsigned char *cur_remain = ssl->in_hdr + ssl->next_record_offset;
rahul_dahiya	0:fb8047b156bb	3044	unsigned char *new_remain = ssl->in_msg + ssl->in_hslen;
rahul_dahiya	0:fb8047b156bb	3045	size_t remain_len = ssl->in_left - ssl->next_record_offset;
rahul_dahiya	0:fb8047b156bb	3046
rahul_dahiya	0:fb8047b156bb	3047	/* First compute and check new lengths */
rahul_dahiya	0:fb8047b156bb	3048	ssl->next_record_offset = new_remain - ssl->in_hdr;
rahul_dahiya	0:fb8047b156bb	3049	ssl->in_left = ssl->next_record_offset + remain_len;
rahul_dahiya	0:fb8047b156bb	3050
rahul_dahiya	0:fb8047b156bb	3051	if( ssl->in_left > MBEDTLS_SSL_BUFFER_LEN -
rahul_dahiya	0:fb8047b156bb	3052	(size_t)( ssl->in_hdr - ssl->in_buf ) )
rahul_dahiya	0:fb8047b156bb	3053	{
rahul_dahiya	0:fb8047b156bb	3054	MBEDTLS_SSL_DEBUG_MSG( 1, ( "reassembled message too large for buffer" ) );
rahul_dahiya	0:fb8047b156bb	3055	return( MBEDTLS_ERR_SSL_BUFFER_TOO_SMALL );
rahul_dahiya	0:fb8047b156bb	3056	}
rahul_dahiya	0:fb8047b156bb	3057
rahul_dahiya	0:fb8047b156bb	3058	memmove( new_remain, cur_remain, remain_len );
rahul_dahiya	0:fb8047b156bb	3059	}
rahul_dahiya	0:fb8047b156bb	3060
rahul_dahiya	0:fb8047b156bb	3061	memcpy( ssl->in_msg, ssl->handshake->hs_msg, ssl->in_hslen );
rahul_dahiya	0:fb8047b156bb	3062
rahul_dahiya	0:fb8047b156bb	3063	mbedtls_free( ssl->handshake->hs_msg );
rahul_dahiya	0:fb8047b156bb	3064	ssl->handshake->hs_msg = NULL;
rahul_dahiya	0:fb8047b156bb	3065
rahul_dahiya	0:fb8047b156bb	3066	MBEDTLS_SSL_DEBUG_BUF( 3, "reassembled handshake message",
rahul_dahiya	0:fb8047b156bb	3067	ssl->in_msg, ssl->in_hslen );
rahul_dahiya	0:fb8047b156bb	3068
rahul_dahiya	0:fb8047b156bb	3069	return( 0 );
rahul_dahiya	0:fb8047b156bb	3070	}
rahul_dahiya	0:fb8047b156bb	3071	#endif /* MBEDTLS_SSL_PROTO_DTLS */
rahul_dahiya	0:fb8047b156bb	3072
rahul_dahiya	0:fb8047b156bb	3073	int mbedtls_ssl_prepare_handshake_record( mbedtls_ssl_context *ssl )
rahul_dahiya	0:fb8047b156bb	3074	{
rahul_dahiya	0:fb8047b156bb	3075	if( ssl->in_msglen < mbedtls_ssl_hs_hdr_len( ssl ) )
rahul_dahiya	0:fb8047b156bb	3076	{
rahul_dahiya	0:fb8047b156bb	3077	MBEDTLS_SSL_DEBUG_MSG( 1, ( "handshake message too short: %d",
rahul_dahiya	0:fb8047b156bb	3078	ssl->in_msglen ) );
rahul_dahiya	0:fb8047b156bb	3079	return( MBEDTLS_ERR_SSL_INVALID_RECORD );
rahul_dahiya	0:fb8047b156bb	3080	}
rahul_dahiya	0:fb8047b156bb	3081
rahul_dahiya	0:fb8047b156bb	3082	ssl->in_hslen = mbedtls_ssl_hs_hdr_len( ssl ) + (
rahul_dahiya	0:fb8047b156bb	3083	( ssl->in_msg[1] << 16 ) \|
rahul_dahiya	0:fb8047b156bb	3084	( ssl->in_msg[2] << 8 ) \|
rahul_dahiya	0:fb8047b156bb	3085	ssl->in_msg[3] );
rahul_dahiya	0:fb8047b156bb	3086
rahul_dahiya	0:fb8047b156bb	3087	MBEDTLS_SSL_DEBUG_MSG( 3, ( "handshake message: msglen ="
rahul_dahiya	0:fb8047b156bb	3088	" %d, type = %d, hslen = %d",
rahul_dahiya	0:fb8047b156bb	3089	ssl->in_msglen, ssl->in_msg[0], ssl->in_hslen ) );
rahul_dahiya	0:fb8047b156bb	3090
rahul_dahiya	0:fb8047b156bb	3091	#if defined(MBEDTLS_SSL_PROTO_DTLS)
rahul_dahiya	0:fb8047b156bb	3092	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
rahul_dahiya	0:fb8047b156bb	3093	{
rahul_dahiya	0:fb8047b156bb	3094	int ret;
rahul_dahiya	0:fb8047b156bb	3095	unsigned int recv_msg_seq = ( ssl->in_msg[4] << 8 ) \| ssl->in_msg[5];
rahul_dahiya	0:fb8047b156bb	3096
rahul_dahiya	0:fb8047b156bb	3097	/* ssl->handshake is NULL when receiving ClientHello for renego */
rahul_dahiya	0:fb8047b156bb	3098	if( ssl->handshake != NULL &&
rahul_dahiya	0:fb8047b156bb	3099	recv_msg_seq != ssl->handshake->in_msg_seq )
rahul_dahiya	0:fb8047b156bb	3100	{
rahul_dahiya	0:fb8047b156bb	3101	/* Retransmit only on last message from previous flight, to avoid
rahul_dahiya	0:fb8047b156bb	3102	* too many retransmissions.
rahul_dahiya	0:fb8047b156bb	3103	* Besides, No sane server ever retransmits HelloVerifyRequest */
rahul_dahiya	0:fb8047b156bb	3104	if( recv_msg_seq == ssl->handshake->in_flight_start_seq - 1 &&
rahul_dahiya	0:fb8047b156bb	3105	ssl->in_msg[0] != MBEDTLS_SSL_HS_HELLO_VERIFY_REQUEST )
rahul_dahiya	0:fb8047b156bb	3106	{
rahul_dahiya	0:fb8047b156bb	3107	MBEDTLS_SSL_DEBUG_MSG( 2, ( "received message from last flight, "
rahul_dahiya	0:fb8047b156bb	3108	"message_seq = %d, start_of_flight = %d",
rahul_dahiya	0:fb8047b156bb	3109	recv_msg_seq,
rahul_dahiya	0:fb8047b156bb	3110	ssl->handshake->in_flight_start_seq ) );
rahul_dahiya	0:fb8047b156bb	3111
rahul_dahiya	0:fb8047b156bb	3112	if( ( ret = mbedtls_ssl_resend( ssl ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	3113	{
rahul_dahiya	0:fb8047b156bb	3114	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_resend", ret );
rahul_dahiya	0:fb8047b156bb	3115	return( ret );
rahul_dahiya	0:fb8047b156bb	3116	}
rahul_dahiya	0:fb8047b156bb	3117	}
rahul_dahiya	0:fb8047b156bb	3118	else
rahul_dahiya	0:fb8047b156bb	3119	{
rahul_dahiya	0:fb8047b156bb	3120	MBEDTLS_SSL_DEBUG_MSG( 2, ( "dropping out-of-sequence message: "
rahul_dahiya	0:fb8047b156bb	3121	"message_seq = %d, expected = %d",
rahul_dahiya	0:fb8047b156bb	3122	recv_msg_seq,
rahul_dahiya	0:fb8047b156bb	3123	ssl->handshake->in_msg_seq ) );
rahul_dahiya	0:fb8047b156bb	3124	}
rahul_dahiya	0:fb8047b156bb	3125
rahul_dahiya	0:fb8047b156bb	3126	return( MBEDTLS_ERR_SSL_WANT_READ );
rahul_dahiya	0:fb8047b156bb	3127	}
rahul_dahiya	0:fb8047b156bb	3128	/* Wait until message completion to increment in_msg_seq */
rahul_dahiya	0:fb8047b156bb	3129
rahul_dahiya	0:fb8047b156bb	3130	/* Reassemble if current message is fragmented or reassembly is
rahul_dahiya	0:fb8047b156bb	3131	* already in progress */
rahul_dahiya	0:fb8047b156bb	3132	if( ssl->in_msglen < ssl->in_hslen \|\|
rahul_dahiya	0:fb8047b156bb	3133	memcmp( ssl->in_msg + 6, "\0\0\0", 3 ) != 0 \|\|
rahul_dahiya	0:fb8047b156bb	3134	memcmp( ssl->in_msg + 9, ssl->in_msg + 1, 3 ) != 0 \|\|
rahul_dahiya	0:fb8047b156bb	3135	( ssl->handshake != NULL && ssl->handshake->hs_msg != NULL ) )
rahul_dahiya	0:fb8047b156bb	3136	{
rahul_dahiya	0:fb8047b156bb	3137	MBEDTLS_SSL_DEBUG_MSG( 2, ( "found fragmented DTLS handshake message" ) );
rahul_dahiya	0:fb8047b156bb	3138
rahul_dahiya	0:fb8047b156bb	3139	if( ( ret = ssl_reassemble_dtls_handshake( ssl ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	3140	{
rahul_dahiya	0:fb8047b156bb	3141	MBEDTLS_SSL_DEBUG_RET( 1, "ssl_reassemble_dtls_handshake", ret );
rahul_dahiya	0:fb8047b156bb	3142	return( ret );
rahul_dahiya	0:fb8047b156bb	3143	}
rahul_dahiya	0:fb8047b156bb	3144	}
rahul_dahiya	0:fb8047b156bb	3145	}
rahul_dahiya	0:fb8047b156bb	3146	else
rahul_dahiya	0:fb8047b156bb	3147	#endif /* MBEDTLS_SSL_PROTO_DTLS */
rahul_dahiya	0:fb8047b156bb	3148	/* With TLS we don't handle fragmentation (for now) */
rahul_dahiya	0:fb8047b156bb	3149	if( ssl->in_msglen < ssl->in_hslen )
rahul_dahiya	0:fb8047b156bb	3150	{
rahul_dahiya	0:fb8047b156bb	3151	MBEDTLS_SSL_DEBUG_MSG( 1, ( "TLS handshake fragmentation not supported" ) );
rahul_dahiya	0:fb8047b156bb	3152	return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE );
rahul_dahiya	0:fb8047b156bb	3153	}
rahul_dahiya	0:fb8047b156bb	3154
rahul_dahiya	0:fb8047b156bb	3155	return( 0 );
rahul_dahiya	0:fb8047b156bb	3156	}
rahul_dahiya	0:fb8047b156bb	3157
rahul_dahiya	0:fb8047b156bb	3158	void mbedtls_ssl_update_handshake_status( mbedtls_ssl_context *ssl )
rahul_dahiya	0:fb8047b156bb	3159	{
rahul_dahiya	0:fb8047b156bb	3160
rahul_dahiya	0:fb8047b156bb	3161	if( ssl->state != MBEDTLS_SSL_HANDSHAKE_OVER &&
rahul_dahiya	0:fb8047b156bb	3162	ssl->handshake != NULL )
rahul_dahiya	0:fb8047b156bb	3163	{
rahul_dahiya	0:fb8047b156bb	3164	ssl->handshake->update_checksum( ssl, ssl->in_msg, ssl->in_hslen );
rahul_dahiya	0:fb8047b156bb	3165	}
rahul_dahiya	0:fb8047b156bb	3166
rahul_dahiya	0:fb8047b156bb	3167	/* Handshake message is complete, increment counter */
rahul_dahiya	0:fb8047b156bb	3168	#if defined(MBEDTLS_SSL_PROTO_DTLS)
rahul_dahiya	0:fb8047b156bb	3169	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM &&
rahul_dahiya	0:fb8047b156bb	3170	ssl->handshake != NULL )
rahul_dahiya	0:fb8047b156bb	3171	{
rahul_dahiya	0:fb8047b156bb	3172	ssl->handshake->in_msg_seq++;
rahul_dahiya	0:fb8047b156bb	3173	}
rahul_dahiya	0:fb8047b156bb	3174	#endif
rahul_dahiya	0:fb8047b156bb	3175	}
rahul_dahiya	0:fb8047b156bb	3176
rahul_dahiya	0:fb8047b156bb	3177	/*
rahul_dahiya	0:fb8047b156bb	3178	* DTLS anti-replay: RFC 6347 4.1.2.6
rahul_dahiya	0:fb8047b156bb	3179	*
rahul_dahiya	0:fb8047b156bb	3180	* in_window is a field of bits numbered from 0 (lsb) to 63 (msb).
rahul_dahiya	0:fb8047b156bb	3181	* Bit n is set iff record number in_window_top - n has been seen.
rahul_dahiya	0:fb8047b156bb	3182	*
rahul_dahiya	0:fb8047b156bb	3183	* Usually, in_window_top is the last record number seen and the lsb of
rahul_dahiya	0:fb8047b156bb	3184	* in_window is set. The only exception is the initial state (record number 0
rahul_dahiya	0:fb8047b156bb	3185	* not seen yet).
rahul_dahiya	0:fb8047b156bb	3186	*/
rahul_dahiya	0:fb8047b156bb	3187	#if defined(MBEDTLS_SSL_DTLS_ANTI_REPLAY)
rahul_dahiya	0:fb8047b156bb	3188	static void ssl_dtls_replay_reset( mbedtls_ssl_context *ssl )
rahul_dahiya	0:fb8047b156bb	3189	{
rahul_dahiya	0:fb8047b156bb	3190	ssl->in_window_top = 0;
rahul_dahiya	0:fb8047b156bb	3191	ssl->in_window = 0;
rahul_dahiya	0:fb8047b156bb	3192	}
rahul_dahiya	0:fb8047b156bb	3193
rahul_dahiya	0:fb8047b156bb	3194	static inline uint64_t ssl_load_six_bytes( unsigned char *buf )
rahul_dahiya	0:fb8047b156bb	3195	{
rahul_dahiya	0:fb8047b156bb	3196	return( ( (uint64_t) buf[0] << 40 ) \|
rahul_dahiya	0:fb8047b156bb	3197	( (uint64_t) buf[1] << 32 ) \|
rahul_dahiya	0:fb8047b156bb	3198	( (uint64_t) buf[2] << 24 ) \|
rahul_dahiya	0:fb8047b156bb	3199	( (uint64_t) buf[3] << 16 ) \|
rahul_dahiya	0:fb8047b156bb	3200	( (uint64_t) buf[4] << 8 ) \|
rahul_dahiya	0:fb8047b156bb	3201	( (uint64_t) buf[5] ) );
rahul_dahiya	0:fb8047b156bb	3202	}
rahul_dahiya	0:fb8047b156bb	3203
rahul_dahiya	0:fb8047b156bb	3204	/*
rahul_dahiya	0:fb8047b156bb	3205	* Return 0 if sequence number is acceptable, -1 otherwise
rahul_dahiya	0:fb8047b156bb	3206	*/
rahul_dahiya	0:fb8047b156bb	3207	int mbedtls_ssl_dtls_replay_check( mbedtls_ssl_context *ssl )
rahul_dahiya	0:fb8047b156bb	3208	{
rahul_dahiya	0:fb8047b156bb	3209	uint64_t rec_seqnum = ssl_load_six_bytes( ssl->in_ctr + 2 );
rahul_dahiya	0:fb8047b156bb	3210	uint64_t bit;
rahul_dahiya	0:fb8047b156bb	3211
rahul_dahiya	0:fb8047b156bb	3212	if( ssl->conf->anti_replay == MBEDTLS_SSL_ANTI_REPLAY_DISABLED )
rahul_dahiya	0:fb8047b156bb	3213	return( 0 );
rahul_dahiya	0:fb8047b156bb	3214
rahul_dahiya	0:fb8047b156bb	3215	if( rec_seqnum > ssl->in_window_top )
rahul_dahiya	0:fb8047b156bb	3216	return( 0 );
rahul_dahiya	0:fb8047b156bb	3217
rahul_dahiya	0:fb8047b156bb	3218	bit = ssl->in_window_top - rec_seqnum;
rahul_dahiya	0:fb8047b156bb	3219
rahul_dahiya	0:fb8047b156bb	3220	if( bit >= 64 )
rahul_dahiya	0:fb8047b156bb	3221	return( -1 );
rahul_dahiya	0:fb8047b156bb	3222
rahul_dahiya	0:fb8047b156bb	3223	if( ( ssl->in_window & ( (uint64_t) 1 << bit ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	3224	return( -1 );
rahul_dahiya	0:fb8047b156bb	3225
rahul_dahiya	0:fb8047b156bb	3226	return( 0 );
rahul_dahiya	0:fb8047b156bb	3227	}
rahul_dahiya	0:fb8047b156bb	3228
rahul_dahiya	0:fb8047b156bb	3229	/*
rahul_dahiya	0:fb8047b156bb	3230	* Update replay window on new validated record
rahul_dahiya	0:fb8047b156bb	3231	*/
rahul_dahiya	0:fb8047b156bb	3232	void mbedtls_ssl_dtls_replay_update( mbedtls_ssl_context *ssl )
rahul_dahiya	0:fb8047b156bb	3233	{
rahul_dahiya	0:fb8047b156bb	3234	uint64_t rec_seqnum = ssl_load_six_bytes( ssl->in_ctr + 2 );
rahul_dahiya	0:fb8047b156bb	3235
rahul_dahiya	0:fb8047b156bb	3236	if( ssl->conf->anti_replay == MBEDTLS_SSL_ANTI_REPLAY_DISABLED )
rahul_dahiya	0:fb8047b156bb	3237	return;
rahul_dahiya	0:fb8047b156bb	3238
rahul_dahiya	0:fb8047b156bb	3239	if( rec_seqnum > ssl->in_window_top )
rahul_dahiya	0:fb8047b156bb	3240	{
rahul_dahiya	0:fb8047b156bb	3241	/* Update window_top and the contents of the window */
rahul_dahiya	0:fb8047b156bb	3242	uint64_t shift = rec_seqnum - ssl->in_window_top;
rahul_dahiya	0:fb8047b156bb	3243
rahul_dahiya	0:fb8047b156bb	3244	if( shift >= 64 )
rahul_dahiya	0:fb8047b156bb	3245	ssl->in_window = 1;
rahul_dahiya	0:fb8047b156bb	3246	else
rahul_dahiya	0:fb8047b156bb	3247	{
rahul_dahiya	0:fb8047b156bb	3248	ssl->in_window <<= shift;
rahul_dahiya	0:fb8047b156bb	3249	ssl->in_window \|= 1;
rahul_dahiya	0:fb8047b156bb	3250	}
rahul_dahiya	0:fb8047b156bb	3251
rahul_dahiya	0:fb8047b156bb	3252	ssl->in_window_top = rec_seqnum;
rahul_dahiya	0:fb8047b156bb	3253	}
rahul_dahiya	0:fb8047b156bb	3254	else
rahul_dahiya	0:fb8047b156bb	3255	{
rahul_dahiya	0:fb8047b156bb	3256	/* Mark that number as seen in the current window */
rahul_dahiya	0:fb8047b156bb	3257	uint64_t bit = ssl->in_window_top - rec_seqnum;
rahul_dahiya	0:fb8047b156bb	3258
rahul_dahiya	0:fb8047b156bb	3259	if( bit < 64 ) /* Always true, but be extra sure */
rahul_dahiya	0:fb8047b156bb	3260	ssl->in_window \|= (uint64_t) 1 << bit;
rahul_dahiya	0:fb8047b156bb	3261	}
rahul_dahiya	0:fb8047b156bb	3262	}
rahul_dahiya	0:fb8047b156bb	3263	#endif /* MBEDTLS_SSL_DTLS_ANTI_REPLAY */
rahul_dahiya	0:fb8047b156bb	3264
rahul_dahiya	0:fb8047b156bb	3265	#if defined(MBEDTLS_SSL_DTLS_CLIENT_PORT_REUSE) && defined(MBEDTLS_SSL_SRV_C)
rahul_dahiya	0:fb8047b156bb	3266	/* Forward declaration */
rahul_dahiya	0:fb8047b156bb	3267	static int ssl_session_reset_int( mbedtls_ssl_context *ssl, int partial );
rahul_dahiya	0:fb8047b156bb	3268
rahul_dahiya	0:fb8047b156bb	3269	/*
rahul_dahiya	0:fb8047b156bb	3270	* Without any SSL context, check if a datagram looks like a ClientHello with
rahul_dahiya	0:fb8047b156bb	3271	* a valid cookie, and if it doesn't, generate a HelloVerifyRequest message.
rahul_dahiya	0:fb8047b156bb	3272	* Both input and output include full DTLS headers.
rahul_dahiya	0:fb8047b156bb	3273	*
rahul_dahiya	0:fb8047b156bb	3274	* - if cookie is valid, return 0
rahul_dahiya	0:fb8047b156bb	3275	* - if ClientHello looks superficially valid but cookie is not,
rahul_dahiya	0:fb8047b156bb	3276	* fill obuf and set olen, then
rahul_dahiya	0:fb8047b156bb	3277	* return MBEDTLS_ERR_SSL_HELLO_VERIFY_REQUIRED
rahul_dahiya	0:fb8047b156bb	3278	* - otherwise return a specific error code
rahul_dahiya	0:fb8047b156bb	3279	*/
rahul_dahiya	0:fb8047b156bb	3280	static int ssl_check_dtls_clihlo_cookie(
rahul_dahiya	0:fb8047b156bb	3281	mbedtls_ssl_cookie_write_t *f_cookie_write,
rahul_dahiya	0:fb8047b156bb	3282	mbedtls_ssl_cookie_check_t *f_cookie_check,
rahul_dahiya	0:fb8047b156bb	3283	void *p_cookie,
rahul_dahiya	0:fb8047b156bb	3284	const unsigned char *cli_id, size_t cli_id_len,
rahul_dahiya	0:fb8047b156bb	3285	const unsigned char *in, size_t in_len,
rahul_dahiya	0:fb8047b156bb	3286	unsigned char obuf, size_t buf_len, size_t olen )
rahul_dahiya	0:fb8047b156bb	3287	{
rahul_dahiya	0:fb8047b156bb	3288	size_t sid_len, cookie_len;
rahul_dahiya	0:fb8047b156bb	3289	unsigned char *p;
rahul_dahiya	0:fb8047b156bb	3290
rahul_dahiya	0:fb8047b156bb	3291	if( f_cookie_write == NULL \|\| f_cookie_check == NULL )
rahul_dahiya	0:fb8047b156bb	3292	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
rahul_dahiya	0:fb8047b156bb	3293
rahul_dahiya	0:fb8047b156bb	3294	/*
rahul_dahiya	0:fb8047b156bb	3295	* Structure of ClientHello with record and handshake headers,
rahul_dahiya	0:fb8047b156bb	3296	* and expected values. We don't need to check a lot, more checks will be
rahul_dahiya	0:fb8047b156bb	3297	* done when actually parsing the ClientHello - skipping those checks
rahul_dahiya	0:fb8047b156bb	3298	* avoids code duplication and does not make cookie forging any easier.
rahul_dahiya	0:fb8047b156bb	3299	*
rahul_dahiya	0:fb8047b156bb	3300	* 0-0 ContentType type; copied, must be handshake
rahul_dahiya	0:fb8047b156bb	3301	* 1-2 ProtocolVersion version; copied
rahul_dahiya	0:fb8047b156bb	3302	* 3-4 uint16 epoch; copied, must be 0
rahul_dahiya	0:fb8047b156bb	3303	* 5-10 uint48 sequence_number; copied
rahul_dahiya	0:fb8047b156bb	3304	* 11-12 uint16 length; (ignored)
rahul_dahiya	0:fb8047b156bb	3305	*
rahul_dahiya	0:fb8047b156bb	3306	* 13-13 HandshakeType msg_type; (ignored)
rahul_dahiya	0:fb8047b156bb	3307	* 14-16 uint24 length; (ignored)
rahul_dahiya	0:fb8047b156bb	3308	* 17-18 uint16 message_seq; copied
rahul_dahiya	0:fb8047b156bb	3309	* 19-21 uint24 fragment_offset; copied, must be 0
rahul_dahiya	0:fb8047b156bb	3310	* 22-24 uint24 fragment_length; (ignored)
rahul_dahiya	0:fb8047b156bb	3311	*
rahul_dahiya	0:fb8047b156bb	3312	* 25-26 ProtocolVersion client_version; (ignored)
rahul_dahiya	0:fb8047b156bb	3313	* 27-58 Random random; (ignored)
rahul_dahiya	0:fb8047b156bb	3314	* 59-xx SessionID session_id; 1 byte len + sid_len content
rahul_dahiya	0:fb8047b156bb	3315	* 60+ opaque cookie<0..2^8-1>; 1 byte len + content
rahul_dahiya	0:fb8047b156bb	3316	* ...
rahul_dahiya	0:fb8047b156bb	3317	*
rahul_dahiya	0:fb8047b156bb	3318	* Minimum length is 61 bytes.
rahul_dahiya	0:fb8047b156bb	3319	*/
rahul_dahiya	0:fb8047b156bb	3320	if( in_len < 61 \|\|
rahul_dahiya	0:fb8047b156bb	3321	in[0] != MBEDTLS_SSL_MSG_HANDSHAKE \|\|
rahul_dahiya	0:fb8047b156bb	3322	in[3] != 0 \|\| in[4] != 0 \|\|
rahul_dahiya	0:fb8047b156bb	3323	in[19] != 0 \|\| in[20] != 0 \|\| in[21] != 0 )
rahul_dahiya	0:fb8047b156bb	3324	{
rahul_dahiya	0:fb8047b156bb	3325	return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
rahul_dahiya	0:fb8047b156bb	3326	}
rahul_dahiya	0:fb8047b156bb	3327
rahul_dahiya	0:fb8047b156bb	3328	sid_len = in[59];
rahul_dahiya	0:fb8047b156bb	3329	if( sid_len > in_len - 61 )
rahul_dahiya	0:fb8047b156bb	3330	return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
rahul_dahiya	0:fb8047b156bb	3331
rahul_dahiya	0:fb8047b156bb	3332	cookie_len = in[60 + sid_len];
rahul_dahiya	0:fb8047b156bb	3333	if( cookie_len > in_len - 60 )
rahul_dahiya	0:fb8047b156bb	3334	return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
rahul_dahiya	0:fb8047b156bb	3335
rahul_dahiya	0:fb8047b156bb	3336	if( f_cookie_check( p_cookie, in + sid_len + 61, cookie_len,
rahul_dahiya	0:fb8047b156bb	3337	cli_id, cli_id_len ) == 0 )
rahul_dahiya	0:fb8047b156bb	3338	{
rahul_dahiya	0:fb8047b156bb	3339	/* Valid cookie */
rahul_dahiya	0:fb8047b156bb	3340	return( 0 );
rahul_dahiya	0:fb8047b156bb	3341	}
rahul_dahiya	0:fb8047b156bb	3342
rahul_dahiya	0:fb8047b156bb	3343	/*
rahul_dahiya	0:fb8047b156bb	3344	* If we get here, we've got an invalid cookie, let's prepare HVR.
rahul_dahiya	0:fb8047b156bb	3345	*
rahul_dahiya	0:fb8047b156bb	3346	* 0-0 ContentType type; copied
rahul_dahiya	0:fb8047b156bb	3347	* 1-2 ProtocolVersion version; copied
rahul_dahiya	0:fb8047b156bb	3348	* 3-4 uint16 epoch; copied
rahul_dahiya	0:fb8047b156bb	3349	* 5-10 uint48 sequence_number; copied
rahul_dahiya	0:fb8047b156bb	3350	* 11-12 uint16 length; olen - 13
rahul_dahiya	0:fb8047b156bb	3351	*
rahul_dahiya	0:fb8047b156bb	3352	* 13-13 HandshakeType msg_type; hello_verify_request
rahul_dahiya	0:fb8047b156bb	3353	* 14-16 uint24 length; olen - 25
rahul_dahiya	0:fb8047b156bb	3354	* 17-18 uint16 message_seq; copied
rahul_dahiya	0:fb8047b156bb	3355	* 19-21 uint24 fragment_offset; copied
rahul_dahiya	0:fb8047b156bb	3356	* 22-24 uint24 fragment_length; olen - 25
rahul_dahiya	0:fb8047b156bb	3357	*
rahul_dahiya	0:fb8047b156bb	3358	* 25-26 ProtocolVersion server_version; 0xfe 0xff
rahul_dahiya	0:fb8047b156bb	3359	* 27-27 opaque cookie<0..2^8-1>; cookie_len = olen - 27, cookie
rahul_dahiya	0:fb8047b156bb	3360	*
rahul_dahiya	0:fb8047b156bb	3361	* Minimum length is 28.
rahul_dahiya	0:fb8047b156bb	3362	*/
rahul_dahiya	0:fb8047b156bb	3363	if( buf_len < 28 )
rahul_dahiya	0:fb8047b156bb	3364	return( MBEDTLS_ERR_SSL_BUFFER_TOO_SMALL );
rahul_dahiya	0:fb8047b156bb	3365
rahul_dahiya	0:fb8047b156bb	3366	/* Copy most fields and adapt others */
rahul_dahiya	0:fb8047b156bb	3367	memcpy( obuf, in, 25 );
rahul_dahiya	0:fb8047b156bb	3368	obuf[13] = MBEDTLS_SSL_HS_HELLO_VERIFY_REQUEST;
rahul_dahiya	0:fb8047b156bb	3369	obuf[25] = 0xfe;
rahul_dahiya	0:fb8047b156bb	3370	obuf[26] = 0xff;
rahul_dahiya	0:fb8047b156bb	3371
rahul_dahiya	0:fb8047b156bb	3372	/* Generate and write actual cookie */
rahul_dahiya	0:fb8047b156bb	3373	p = obuf + 28;
rahul_dahiya	0:fb8047b156bb	3374	if( f_cookie_write( p_cookie,
rahul_dahiya	0:fb8047b156bb	3375	&p, obuf + buf_len, cli_id, cli_id_len ) != 0 )
rahul_dahiya	0:fb8047b156bb	3376	{
rahul_dahiya	0:fb8047b156bb	3377	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
rahul_dahiya	0:fb8047b156bb	3378	}
rahul_dahiya	0:fb8047b156bb	3379
rahul_dahiya	0:fb8047b156bb	3380	*olen = p - obuf;
rahul_dahiya	0:fb8047b156bb	3381
rahul_dahiya	0:fb8047b156bb	3382	/* Go back and fill length fields */
rahul_dahiya	0:fb8047b156bb	3383	obuf[27] = (unsigned char)( *olen - 28 );
rahul_dahiya	0:fb8047b156bb	3384
rahul_dahiya	0:fb8047b156bb	3385	obuf[14] = obuf[22] = (unsigned char)( ( *olen - 25 ) >> 16 );
rahul_dahiya	0:fb8047b156bb	3386	obuf[15] = obuf[23] = (unsigned char)( ( *olen - 25 ) >> 8 );
rahul_dahiya	0:fb8047b156bb	3387	obuf[16] = obuf[24] = (unsigned char)( ( *olen - 25 ) );
rahul_dahiya	0:fb8047b156bb	3388
rahul_dahiya	0:fb8047b156bb	3389	obuf[11] = (unsigned char)( ( *olen - 13 ) >> 8 );
rahul_dahiya	0:fb8047b156bb	3390	obuf[12] = (unsigned char)( ( *olen - 13 ) );
rahul_dahiya	0:fb8047b156bb	3391
rahul_dahiya	0:fb8047b156bb	3392	return( MBEDTLS_ERR_SSL_HELLO_VERIFY_REQUIRED );
rahul_dahiya	0:fb8047b156bb	3393	}
rahul_dahiya	0:fb8047b156bb	3394
rahul_dahiya	0:fb8047b156bb	3395	/*
rahul_dahiya	0:fb8047b156bb	3396	* Handle possible client reconnect with the same UDP quadruplet
rahul_dahiya	0:fb8047b156bb	3397	* (RFC 6347 Section 4.2.8).
rahul_dahiya	0:fb8047b156bb	3398	*
rahul_dahiya	0:fb8047b156bb	3399	* Called by ssl_parse_record_header() in case we receive an epoch 0 record
rahul_dahiya	0:fb8047b156bb	3400	* that looks like a ClientHello.
rahul_dahiya	0:fb8047b156bb	3401	*
rahul_dahiya	0:fb8047b156bb	3402	* - if the input looks like a ClientHello without cookies,
rahul_dahiya	0:fb8047b156bb	3403	* send back HelloVerifyRequest, then
rahul_dahiya	0:fb8047b156bb	3404	* return MBEDTLS_ERR_SSL_HELLO_VERIFY_REQUIRED
rahul_dahiya	0:fb8047b156bb	3405	* - if the input looks like a ClientHello with a valid cookie,
rahul_dahiya	0:fb8047b156bb	3406	* reset the session of the current context, and
rahul_dahiya	0:fb8047b156bb	3407	* return MBEDTLS_ERR_SSL_CLIENT_RECONNECT
rahul_dahiya	0:fb8047b156bb	3408	* - if anything goes wrong, return a specific error code
rahul_dahiya	0:fb8047b156bb	3409	*
rahul_dahiya	0:fb8047b156bb	3410	* mbedtls_ssl_read_record() will ignore the record if anything else than
rahul_dahiya	0:fb8047b156bb	3411	* MBEDTLS_ERR_SSL_CLIENT_RECONNECT or 0 is returned, although this function
rahul_dahiya	0:fb8047b156bb	3412	* cannot not return 0.
rahul_dahiya	0:fb8047b156bb	3413	*/
rahul_dahiya	0:fb8047b156bb	3414	static int ssl_handle_possible_reconnect( mbedtls_ssl_context *ssl )
rahul_dahiya	0:fb8047b156bb	3415	{
rahul_dahiya	0:fb8047b156bb	3416	int ret;
rahul_dahiya	0:fb8047b156bb	3417	size_t len;
rahul_dahiya	0:fb8047b156bb	3418
rahul_dahiya	0:fb8047b156bb	3419	ret = ssl_check_dtls_clihlo_cookie(
rahul_dahiya	0:fb8047b156bb	3420	ssl->conf->f_cookie_write,
rahul_dahiya	0:fb8047b156bb	3421	ssl->conf->f_cookie_check,
rahul_dahiya	0:fb8047b156bb	3422	ssl->conf->p_cookie,
rahul_dahiya	0:fb8047b156bb	3423	ssl->cli_id, ssl->cli_id_len,
rahul_dahiya	0:fb8047b156bb	3424	ssl->in_buf, ssl->in_left,
rahul_dahiya	0:fb8047b156bb	3425	ssl->out_buf, MBEDTLS_SSL_MAX_CONTENT_LEN, &len );
rahul_dahiya	0:fb8047b156bb	3426
rahul_dahiya	0:fb8047b156bb	3427	MBEDTLS_SSL_DEBUG_RET( 2, "ssl_check_dtls_clihlo_cookie", ret );
rahul_dahiya	0:fb8047b156bb	3428
rahul_dahiya	0:fb8047b156bb	3429	if( ret == MBEDTLS_ERR_SSL_HELLO_VERIFY_REQUIRED )
rahul_dahiya	0:fb8047b156bb	3430	{
rahul_dahiya	0:fb8047b156bb	3431	/* Don't check write errors as we can't do anything here.
rahul_dahiya	0:fb8047b156bb	3432	* If the error is permanent we'll catch it later,
rahul_dahiya	0:fb8047b156bb	3433	* if it's not, then hopefully it'll work next time. */
rahul_dahiya	0:fb8047b156bb	3434	(void) ssl->f_send( ssl->p_bio, ssl->out_buf, len );
rahul_dahiya	0:fb8047b156bb	3435
rahul_dahiya	0:fb8047b156bb	3436	return( MBEDTLS_ERR_SSL_HELLO_VERIFY_REQUIRED );
rahul_dahiya	0:fb8047b156bb	3437	}
rahul_dahiya	0:fb8047b156bb	3438
rahul_dahiya	0:fb8047b156bb	3439	if( ret == 0 )
rahul_dahiya	0:fb8047b156bb	3440	{
rahul_dahiya	0:fb8047b156bb	3441	/* Got a valid cookie, partially reset context */
rahul_dahiya	0:fb8047b156bb	3442	if( ( ret = ssl_session_reset_int( ssl, 1 ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	3443	{
rahul_dahiya	0:fb8047b156bb	3444	MBEDTLS_SSL_DEBUG_RET( 1, "reset", ret );
rahul_dahiya	0:fb8047b156bb	3445	return( ret );
rahul_dahiya	0:fb8047b156bb	3446	}
rahul_dahiya	0:fb8047b156bb	3447
rahul_dahiya	0:fb8047b156bb	3448	return( MBEDTLS_ERR_SSL_CLIENT_RECONNECT );
rahul_dahiya	0:fb8047b156bb	3449	}
rahul_dahiya	0:fb8047b156bb	3450
rahul_dahiya	0:fb8047b156bb	3451	return( ret );
rahul_dahiya	0:fb8047b156bb	3452	}
rahul_dahiya	0:fb8047b156bb	3453	#endif /* MBEDTLS_SSL_DTLS_CLIENT_PORT_REUSE && MBEDTLS_SSL_SRV_C */
rahul_dahiya	0:fb8047b156bb	3454
rahul_dahiya	0:fb8047b156bb	3455	/*
rahul_dahiya	0:fb8047b156bb	3456	* ContentType type;
rahul_dahiya	0:fb8047b156bb	3457	* ProtocolVersion version;
rahul_dahiya	0:fb8047b156bb	3458	* uint16 epoch; // DTLS only
rahul_dahiya	0:fb8047b156bb	3459	* uint48 sequence_number; // DTLS only
rahul_dahiya	0:fb8047b156bb	3460	* uint16 length;
rahul_dahiya	0:fb8047b156bb	3461	*
rahul_dahiya	0:fb8047b156bb	3462	* Return 0 if header looks sane (and, for DTLS, the record is expected)
rahul_dahiya	0:fb8047b156bb	3463	* MBEDTLS_ERR_SSL_INVALID_RECORD if the header looks bad,
rahul_dahiya	0:fb8047b156bb	3464	* MBEDTLS_ERR_SSL_UNEXPECTED_RECORD (DTLS only) if sane but unexpected.
rahul_dahiya	0:fb8047b156bb	3465	*
rahul_dahiya	0:fb8047b156bb	3466	* With DTLS, mbedtls_ssl_read_record() will:
rahul_dahiya	0:fb8047b156bb	3467	* 1. proceed with the record if this function returns 0
rahul_dahiya	0:fb8047b156bb	3468	* 2. drop only the current record if this function returns UNEXPECTED_RECORD
rahul_dahiya	0:fb8047b156bb	3469	* 3. return CLIENT_RECONNECT if this function return that value
rahul_dahiya	0:fb8047b156bb	3470	* 4. drop the whole datagram if this function returns anything else.
rahul_dahiya	0:fb8047b156bb	3471	* Point 2 is needed when the peer is resending, and we have already received
rahul_dahiya	0:fb8047b156bb	3472	* the first record from a datagram but are still waiting for the others.
rahul_dahiya	0:fb8047b156bb	3473	*/
rahul_dahiya	0:fb8047b156bb	3474	static int ssl_parse_record_header( mbedtls_ssl_context *ssl )
rahul_dahiya	0:fb8047b156bb	3475	{
rahul_dahiya	0:fb8047b156bb	3476	int major_ver, minor_ver;
rahul_dahiya	0:fb8047b156bb	3477
rahul_dahiya	0:fb8047b156bb	3478	MBEDTLS_SSL_DEBUG_BUF( 4, "input record header", ssl->in_hdr, mbedtls_ssl_hdr_len( ssl ) );
rahul_dahiya	0:fb8047b156bb	3479
rahul_dahiya	0:fb8047b156bb	3480	ssl->in_msgtype = ssl->in_hdr[0];
rahul_dahiya	0:fb8047b156bb	3481	ssl->in_msglen = ( ssl->in_len[0] << 8 ) \| ssl->in_len[1];
rahul_dahiya	0:fb8047b156bb	3482	mbedtls_ssl_read_version( &major_ver, &minor_ver, ssl->conf->transport, ssl->in_hdr + 1 );
rahul_dahiya	0:fb8047b156bb	3483
rahul_dahiya	0:fb8047b156bb	3484	MBEDTLS_SSL_DEBUG_MSG( 3, ( "input record: msgtype = %d, "
rahul_dahiya	0:fb8047b156bb	3485	"version = [%d:%d], msglen = %d",
rahul_dahiya	0:fb8047b156bb	3486	ssl->in_msgtype,
rahul_dahiya	0:fb8047b156bb	3487	major_ver, minor_ver, ssl->in_msglen ) );
rahul_dahiya	0:fb8047b156bb	3488
rahul_dahiya	0:fb8047b156bb	3489	/* Check record type */
rahul_dahiya	0:fb8047b156bb	3490	if( ssl->in_msgtype != MBEDTLS_SSL_MSG_HANDSHAKE &&
rahul_dahiya	0:fb8047b156bb	3491	ssl->in_msgtype != MBEDTLS_SSL_MSG_ALERT &&
rahul_dahiya	0:fb8047b156bb	3492	ssl->in_msgtype != MBEDTLS_SSL_MSG_CHANGE_CIPHER_SPEC &&
rahul_dahiya	0:fb8047b156bb	3493	ssl->in_msgtype != MBEDTLS_SSL_MSG_APPLICATION_DATA )
rahul_dahiya	0:fb8047b156bb	3494	{
rahul_dahiya	0:fb8047b156bb	3495	MBEDTLS_SSL_DEBUG_MSG( 1, ( "unknown record type" ) );
rahul_dahiya	0:fb8047b156bb	3496	mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
rahul_dahiya	0:fb8047b156bb	3497	MBEDTLS_SSL_ALERT_MSG_UNEXPECTED_MESSAGE );
rahul_dahiya	0:fb8047b156bb	3498	return( MBEDTLS_ERR_SSL_INVALID_RECORD );
rahul_dahiya	0:fb8047b156bb	3499	}
rahul_dahiya	0:fb8047b156bb	3500
rahul_dahiya	0:fb8047b156bb	3501	/* Check version */
rahul_dahiya	0:fb8047b156bb	3502	if( major_ver != ssl->major_ver )
rahul_dahiya	0:fb8047b156bb	3503	{
rahul_dahiya	0:fb8047b156bb	3504	MBEDTLS_SSL_DEBUG_MSG( 1, ( "major version mismatch" ) );
rahul_dahiya	0:fb8047b156bb	3505	return( MBEDTLS_ERR_SSL_INVALID_RECORD );
rahul_dahiya	0:fb8047b156bb	3506	}
rahul_dahiya	0:fb8047b156bb	3507
rahul_dahiya	0:fb8047b156bb	3508	if( minor_ver > ssl->conf->max_minor_ver )
rahul_dahiya	0:fb8047b156bb	3509	{
rahul_dahiya	0:fb8047b156bb	3510	MBEDTLS_SSL_DEBUG_MSG( 1, ( "minor version mismatch" ) );
rahul_dahiya	0:fb8047b156bb	3511	return( MBEDTLS_ERR_SSL_INVALID_RECORD );
rahul_dahiya	0:fb8047b156bb	3512	}
rahul_dahiya	0:fb8047b156bb	3513
rahul_dahiya	0:fb8047b156bb	3514	/* Check length against the size of our buffer */
rahul_dahiya	0:fb8047b156bb	3515	if( ssl->in_msglen > MBEDTLS_SSL_BUFFER_LEN
rahul_dahiya	0:fb8047b156bb	3516	- (size_t)( ssl->in_msg - ssl->in_buf ) )
rahul_dahiya	0:fb8047b156bb	3517	{
rahul_dahiya	0:fb8047b156bb	3518	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad message length" ) );
rahul_dahiya	0:fb8047b156bb	3519	return( MBEDTLS_ERR_SSL_INVALID_RECORD );
rahul_dahiya	0:fb8047b156bb	3520	}
rahul_dahiya	0:fb8047b156bb	3521
rahul_dahiya	0:fb8047b156bb	3522	/* Check length against bounds of the current transform and version */
rahul_dahiya	0:fb8047b156bb	3523	if( ssl->transform_in == NULL )
rahul_dahiya	0:fb8047b156bb	3524	{
rahul_dahiya	0:fb8047b156bb	3525	if( ssl->in_msglen < 1 \|\|
rahul_dahiya	0:fb8047b156bb	3526	ssl->in_msglen > MBEDTLS_SSL_MAX_CONTENT_LEN )
rahul_dahiya	0:fb8047b156bb	3527	{
rahul_dahiya	0:fb8047b156bb	3528	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad message length" ) );
rahul_dahiya	0:fb8047b156bb	3529	return( MBEDTLS_ERR_SSL_INVALID_RECORD );
rahul_dahiya	0:fb8047b156bb	3530	}
rahul_dahiya	0:fb8047b156bb	3531	}
rahul_dahiya	0:fb8047b156bb	3532	else
rahul_dahiya	0:fb8047b156bb	3533	{
rahul_dahiya	0:fb8047b156bb	3534	if( ssl->in_msglen < ssl->transform_in->minlen )
rahul_dahiya	0:fb8047b156bb	3535	{
rahul_dahiya	0:fb8047b156bb	3536	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad message length" ) );
rahul_dahiya	0:fb8047b156bb	3537	return( MBEDTLS_ERR_SSL_INVALID_RECORD );
rahul_dahiya	0:fb8047b156bb	3538	}
rahul_dahiya	0:fb8047b156bb	3539
rahul_dahiya	0:fb8047b156bb	3540	#if defined(MBEDTLS_SSL_PROTO_SSL3)
rahul_dahiya	0:fb8047b156bb	3541	if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 &&
rahul_dahiya	0:fb8047b156bb	3542	ssl->in_msglen > ssl->transform_in->minlen + MBEDTLS_SSL_MAX_CONTENT_LEN )
rahul_dahiya	0:fb8047b156bb	3543	{
rahul_dahiya	0:fb8047b156bb	3544	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad message length" ) );
rahul_dahiya	0:fb8047b156bb	3545	return( MBEDTLS_ERR_SSL_INVALID_RECORD );
rahul_dahiya	0:fb8047b156bb	3546	}
rahul_dahiya	0:fb8047b156bb	3547	#endif
rahul_dahiya	0:fb8047b156bb	3548	#if defined(MBEDTLS_SSL_PROTO_TLS1) \|\| defined(MBEDTLS_SSL_PROTO_TLS1_1) \|\| \
rahul_dahiya	0:fb8047b156bb	3549	defined(MBEDTLS_SSL_PROTO_TLS1_2)
rahul_dahiya	0:fb8047b156bb	3550	/*
rahul_dahiya	0:fb8047b156bb	3551	* TLS encrypted messages can have up to 256 bytes of padding
rahul_dahiya	0:fb8047b156bb	3552	*/
rahul_dahiya	0:fb8047b156bb	3553	if( ssl->minor_ver >= MBEDTLS_SSL_MINOR_VERSION_1 &&
rahul_dahiya	0:fb8047b156bb	3554	ssl->in_msglen > ssl->transform_in->minlen +
rahul_dahiya	0:fb8047b156bb	3555	MBEDTLS_SSL_MAX_CONTENT_LEN + 256 )
rahul_dahiya	0:fb8047b156bb	3556	{
rahul_dahiya	0:fb8047b156bb	3557	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad message length" ) );
rahul_dahiya	0:fb8047b156bb	3558	return( MBEDTLS_ERR_SSL_INVALID_RECORD );
rahul_dahiya	0:fb8047b156bb	3559	}
rahul_dahiya	0:fb8047b156bb	3560	#endif
rahul_dahiya	0:fb8047b156bb	3561	}
rahul_dahiya	0:fb8047b156bb	3562
rahul_dahiya	0:fb8047b156bb	3563	/*
rahul_dahiya	0:fb8047b156bb	3564	* DTLS-related tests done last, because most of them may result in
rahul_dahiya	0:fb8047b156bb	3565	* silently dropping the record (but not the whole datagram), and we only
rahul_dahiya	0:fb8047b156bb	3566	* want to consider that after ensuring that the "basic" fields (type,
rahul_dahiya	0:fb8047b156bb	3567	* version, length) are sane.
rahul_dahiya	0:fb8047b156bb	3568	*/
rahul_dahiya	0:fb8047b156bb	3569	#if defined(MBEDTLS_SSL_PROTO_DTLS)
rahul_dahiya	0:fb8047b156bb	3570	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
rahul_dahiya	0:fb8047b156bb	3571	{
rahul_dahiya	0:fb8047b156bb	3572	unsigned int rec_epoch = ( ssl->in_ctr[0] << 8 ) \| ssl->in_ctr[1];
rahul_dahiya	0:fb8047b156bb	3573
rahul_dahiya	0:fb8047b156bb	3574	/* Drop unexpected ChangeCipherSpec messages */
rahul_dahiya	0:fb8047b156bb	3575	if( ssl->in_msgtype == MBEDTLS_SSL_MSG_CHANGE_CIPHER_SPEC &&
rahul_dahiya	0:fb8047b156bb	3576	ssl->state != MBEDTLS_SSL_CLIENT_CHANGE_CIPHER_SPEC &&
rahul_dahiya	0:fb8047b156bb	3577	ssl->state != MBEDTLS_SSL_SERVER_CHANGE_CIPHER_SPEC )
rahul_dahiya	0:fb8047b156bb	3578	{
rahul_dahiya	0:fb8047b156bb	3579	MBEDTLS_SSL_DEBUG_MSG( 1, ( "dropping unexpected ChangeCipherSpec" ) );
rahul_dahiya	0:fb8047b156bb	3580	return( MBEDTLS_ERR_SSL_UNEXPECTED_RECORD );
rahul_dahiya	0:fb8047b156bb	3581	}
rahul_dahiya	0:fb8047b156bb	3582
rahul_dahiya	0:fb8047b156bb	3583	/* Drop unexpected ApplicationData records,
rahul_dahiya	0:fb8047b156bb	3584	* except at the beginning of renegotiations */
rahul_dahiya	0:fb8047b156bb	3585	if( ssl->in_msgtype == MBEDTLS_SSL_MSG_APPLICATION_DATA &&
rahul_dahiya	0:fb8047b156bb	3586	ssl->state != MBEDTLS_SSL_HANDSHAKE_OVER
rahul_dahiya	0:fb8047b156bb	3587	#if defined(MBEDTLS_SSL_RENEGOTIATION)
rahul_dahiya	0:fb8047b156bb	3588	&& ! ( ssl->renego_status == MBEDTLS_SSL_RENEGOTIATION_IN_PROGRESS &&
rahul_dahiya	0:fb8047b156bb	3589	ssl->state == MBEDTLS_SSL_SERVER_HELLO )
rahul_dahiya	0:fb8047b156bb	3590	#endif
rahul_dahiya	0:fb8047b156bb	3591	)
rahul_dahiya	0:fb8047b156bb	3592	{
rahul_dahiya	0:fb8047b156bb	3593	MBEDTLS_SSL_DEBUG_MSG( 1, ( "dropping unexpected ApplicationData" ) );
rahul_dahiya	0:fb8047b156bb	3594	return( MBEDTLS_ERR_SSL_UNEXPECTED_RECORD );
rahul_dahiya	0:fb8047b156bb	3595	}
rahul_dahiya	0:fb8047b156bb	3596
rahul_dahiya	0:fb8047b156bb	3597	/* Check epoch (and sequence number) with DTLS */
rahul_dahiya	0:fb8047b156bb	3598	if( rec_epoch != ssl->in_epoch )
rahul_dahiya	0:fb8047b156bb	3599	{
rahul_dahiya	0:fb8047b156bb	3600	MBEDTLS_SSL_DEBUG_MSG( 1, ( "record from another epoch: "
rahul_dahiya	0:fb8047b156bb	3601	"expected %d, received %d",
rahul_dahiya	0:fb8047b156bb	3602	ssl->in_epoch, rec_epoch ) );
rahul_dahiya	0:fb8047b156bb	3603
rahul_dahiya	0:fb8047b156bb	3604	#if defined(MBEDTLS_SSL_DTLS_CLIENT_PORT_REUSE) && defined(MBEDTLS_SSL_SRV_C)
rahul_dahiya	0:fb8047b156bb	3605	/*
rahul_dahiya	0:fb8047b156bb	3606	* Check for an epoch 0 ClientHello. We can't use in_msg here to
rahul_dahiya	0:fb8047b156bb	3607	* access the first byte of record content (handshake type), as we
rahul_dahiya	0:fb8047b156bb	3608	* have an active transform (possibly iv_len != 0), so use the
rahul_dahiya	0:fb8047b156bb	3609	* fact that the record header len is 13 instead.
rahul_dahiya	0:fb8047b156bb	3610	*/
rahul_dahiya	0:fb8047b156bb	3611	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER &&
rahul_dahiya	0:fb8047b156bb	3612	ssl->state == MBEDTLS_SSL_HANDSHAKE_OVER &&
rahul_dahiya	0:fb8047b156bb	3613	rec_epoch == 0 &&
rahul_dahiya	0:fb8047b156bb	3614	ssl->in_msgtype == MBEDTLS_SSL_MSG_HANDSHAKE &&
rahul_dahiya	0:fb8047b156bb	3615	ssl->in_left > 13 &&
rahul_dahiya	0:fb8047b156bb	3616	ssl->in_buf[13] == MBEDTLS_SSL_HS_CLIENT_HELLO )
rahul_dahiya	0:fb8047b156bb	3617	{
rahul_dahiya	0:fb8047b156bb	3618	MBEDTLS_SSL_DEBUG_MSG( 1, ( "possible client reconnect "
rahul_dahiya	0:fb8047b156bb	3619	"from the same port" ) );
rahul_dahiya	0:fb8047b156bb	3620	return( ssl_handle_possible_reconnect( ssl ) );
rahul_dahiya	0:fb8047b156bb	3621	}
rahul_dahiya	0:fb8047b156bb	3622	else
rahul_dahiya	0:fb8047b156bb	3623	#endif /* MBEDTLS_SSL_DTLS_CLIENT_PORT_REUSE && MBEDTLS_SSL_SRV_C */
rahul_dahiya	0:fb8047b156bb	3624	return( MBEDTLS_ERR_SSL_UNEXPECTED_RECORD );
rahul_dahiya	0:fb8047b156bb	3625	}
rahul_dahiya	0:fb8047b156bb	3626
rahul_dahiya	0:fb8047b156bb	3627	#if defined(MBEDTLS_SSL_DTLS_ANTI_REPLAY)
rahul_dahiya	0:fb8047b156bb	3628	/* Replay detection only works for the current epoch */
rahul_dahiya	0:fb8047b156bb	3629	if( rec_epoch == ssl->in_epoch &&
rahul_dahiya	0:fb8047b156bb	3630	mbedtls_ssl_dtls_replay_check( ssl ) != 0 )
rahul_dahiya	0:fb8047b156bb	3631	{
rahul_dahiya	0:fb8047b156bb	3632	MBEDTLS_SSL_DEBUG_MSG( 1, ( "replayed record" ) );
rahul_dahiya	0:fb8047b156bb	3633	return( MBEDTLS_ERR_SSL_UNEXPECTED_RECORD );
rahul_dahiya	0:fb8047b156bb	3634	}
rahul_dahiya	0:fb8047b156bb	3635	#endif
rahul_dahiya	0:fb8047b156bb	3636	}
rahul_dahiya	0:fb8047b156bb	3637	#endif /* MBEDTLS_SSL_PROTO_DTLS */
rahul_dahiya	0:fb8047b156bb	3638
rahul_dahiya	0:fb8047b156bb	3639	return( 0 );
rahul_dahiya	0:fb8047b156bb	3640	}
rahul_dahiya	0:fb8047b156bb	3641
rahul_dahiya	0:fb8047b156bb	3642	/*
rahul_dahiya	0:fb8047b156bb	3643	* If applicable, decrypt (and decompress) record content
rahul_dahiya	0:fb8047b156bb	3644	*/
rahul_dahiya	0:fb8047b156bb	3645	static int ssl_prepare_record_content( mbedtls_ssl_context *ssl )
rahul_dahiya	0:fb8047b156bb	3646	{
rahul_dahiya	0:fb8047b156bb	3647	int ret, done = 0;
rahul_dahiya	0:fb8047b156bb	3648
rahul_dahiya	0:fb8047b156bb	3649	MBEDTLS_SSL_DEBUG_BUF( 4, "input record from network",
rahul_dahiya	0:fb8047b156bb	3650	ssl->in_hdr, mbedtls_ssl_hdr_len( ssl ) + ssl->in_msglen );
rahul_dahiya	0:fb8047b156bb	3651
rahul_dahiya	0:fb8047b156bb	3652	#if defined(MBEDTLS_SSL_HW_RECORD_ACCEL)
rahul_dahiya	0:fb8047b156bb	3653	if( mbedtls_ssl_hw_record_read != NULL )
rahul_dahiya	0:fb8047b156bb	3654	{
rahul_dahiya	0:fb8047b156bb	3655	MBEDTLS_SSL_DEBUG_MSG( 2, ( "going for mbedtls_ssl_hw_record_read()" ) );
rahul_dahiya	0:fb8047b156bb	3656
rahul_dahiya	0:fb8047b156bb	3657	ret = mbedtls_ssl_hw_record_read( ssl );
rahul_dahiya	0:fb8047b156bb	3658	if( ret != 0 && ret != MBEDTLS_ERR_SSL_HW_ACCEL_FALLTHROUGH )
rahul_dahiya	0:fb8047b156bb	3659	{
rahul_dahiya	0:fb8047b156bb	3660	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_hw_record_read", ret );
rahul_dahiya	0:fb8047b156bb	3661	return( MBEDTLS_ERR_SSL_HW_ACCEL_FAILED );
rahul_dahiya	0:fb8047b156bb	3662	}
rahul_dahiya	0:fb8047b156bb	3663
rahul_dahiya	0:fb8047b156bb	3664	if( ret == 0 )
rahul_dahiya	0:fb8047b156bb	3665	done = 1;
rahul_dahiya	0:fb8047b156bb	3666	}
rahul_dahiya	0:fb8047b156bb	3667	#endif /* MBEDTLS_SSL_HW_RECORD_ACCEL */
rahul_dahiya	0:fb8047b156bb	3668	if( !done && ssl->transform_in != NULL )
rahul_dahiya	0:fb8047b156bb	3669	{
rahul_dahiya	0:fb8047b156bb	3670	if( ( ret = ssl_decrypt_buf( ssl ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	3671	{
rahul_dahiya	0:fb8047b156bb	3672	MBEDTLS_SSL_DEBUG_RET( 1, "ssl_decrypt_buf", ret );
rahul_dahiya	0:fb8047b156bb	3673	return( ret );
rahul_dahiya	0:fb8047b156bb	3674	}
rahul_dahiya	0:fb8047b156bb	3675
rahul_dahiya	0:fb8047b156bb	3676	MBEDTLS_SSL_DEBUG_BUF( 4, "input payload after decrypt",
rahul_dahiya	0:fb8047b156bb	3677	ssl->in_msg, ssl->in_msglen );
rahul_dahiya	0:fb8047b156bb	3678
rahul_dahiya	0:fb8047b156bb	3679	if( ssl->in_msglen > MBEDTLS_SSL_MAX_CONTENT_LEN )
rahul_dahiya	0:fb8047b156bb	3680	{
rahul_dahiya	0:fb8047b156bb	3681	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad message length" ) );
rahul_dahiya	0:fb8047b156bb	3682	return( MBEDTLS_ERR_SSL_INVALID_RECORD );
rahul_dahiya	0:fb8047b156bb	3683	}
rahul_dahiya	0:fb8047b156bb	3684	}
rahul_dahiya	0:fb8047b156bb	3685
rahul_dahiya	0:fb8047b156bb	3686	#if defined(MBEDTLS_ZLIB_SUPPORT)
rahul_dahiya	0:fb8047b156bb	3687	if( ssl->transform_in != NULL &&
rahul_dahiya	0:fb8047b156bb	3688	ssl->session_in->compression == MBEDTLS_SSL_COMPRESS_DEFLATE )
rahul_dahiya	0:fb8047b156bb	3689	{
rahul_dahiya	0:fb8047b156bb	3690	if( ( ret = ssl_decompress_buf( ssl ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	3691	{
rahul_dahiya	0:fb8047b156bb	3692	MBEDTLS_SSL_DEBUG_RET( 1, "ssl_decompress_buf", ret );
rahul_dahiya	0:fb8047b156bb	3693	return( ret );
rahul_dahiya	0:fb8047b156bb	3694	}
rahul_dahiya	0:fb8047b156bb	3695	}
rahul_dahiya	0:fb8047b156bb	3696	#endif /* MBEDTLS_ZLIB_SUPPORT */
rahul_dahiya	0:fb8047b156bb	3697
rahul_dahiya	0:fb8047b156bb	3698	#if defined(MBEDTLS_SSL_DTLS_ANTI_REPLAY)
rahul_dahiya	0:fb8047b156bb	3699	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
rahul_dahiya	0:fb8047b156bb	3700	{
rahul_dahiya	0:fb8047b156bb	3701	mbedtls_ssl_dtls_replay_update( ssl );
rahul_dahiya	0:fb8047b156bb	3702	}
rahul_dahiya	0:fb8047b156bb	3703	#endif
rahul_dahiya	0:fb8047b156bb	3704
rahul_dahiya	0:fb8047b156bb	3705	return( 0 );
rahul_dahiya	0:fb8047b156bb	3706	}
rahul_dahiya	0:fb8047b156bb	3707
rahul_dahiya	0:fb8047b156bb	3708	static void ssl_handshake_wrapup_free_hs_transform( mbedtls_ssl_context *ssl );
rahul_dahiya	0:fb8047b156bb	3709
rahul_dahiya	0:fb8047b156bb	3710	/*
rahul_dahiya	0:fb8047b156bb	3711	* Read a record.
rahul_dahiya	0:fb8047b156bb	3712	*
rahul_dahiya	0:fb8047b156bb	3713	* Silently ignore non-fatal alert (and for DTLS, invalid records as well,
rahul_dahiya	0:fb8047b156bb	3714	* RFC 6347 4.1.2.7) and continue reading until a valid record is found.
rahul_dahiya	0:fb8047b156bb	3715	*
rahul_dahiya	0:fb8047b156bb	3716	*/
rahul_dahiya	0:fb8047b156bb	3717	int mbedtls_ssl_read_record( mbedtls_ssl_context *ssl )
rahul_dahiya	0:fb8047b156bb	3718	{
rahul_dahiya	0:fb8047b156bb	3719	int ret;
rahul_dahiya	0:fb8047b156bb	3720
rahul_dahiya	0:fb8047b156bb	3721	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> read record" ) );
rahul_dahiya	0:fb8047b156bb	3722
rahul_dahiya	0:fb8047b156bb	3723	if( ssl->keep_current_message == 0 )
rahul_dahiya	0:fb8047b156bb	3724	{
rahul_dahiya	0:fb8047b156bb	3725	do {
rahul_dahiya	0:fb8047b156bb	3726
rahul_dahiya	0:fb8047b156bb	3727	if( ( ret = mbedtls_ssl_read_record_layer( ssl ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	3728	{
rahul_dahiya	0:fb8047b156bb	3729	MBEDTLS_SSL_DEBUG_RET( 1, ( "mbedtls_ssl_read_record_layer" ), ret );
rahul_dahiya	0:fb8047b156bb	3730	return( ret );
rahul_dahiya	0:fb8047b156bb	3731	}
rahul_dahiya	0:fb8047b156bb	3732
rahul_dahiya	0:fb8047b156bb	3733	ret = mbedtls_ssl_handle_message_type( ssl );
rahul_dahiya	0:fb8047b156bb	3734
rahul_dahiya	0:fb8047b156bb	3735	} while( MBEDTLS_ERR_SSL_NON_FATAL == ret );
rahul_dahiya	0:fb8047b156bb	3736
rahul_dahiya	0:fb8047b156bb	3737	if( 0 != ret )
rahul_dahiya	0:fb8047b156bb	3738	{
rahul_dahiya	0:fb8047b156bb	3739	MBEDTLS_SSL_DEBUG_RET( 1, ( "mbedtls_ssl_read_record_layer" ), ret );
rahul_dahiya	0:fb8047b156bb	3740	return( ret );
rahul_dahiya	0:fb8047b156bb	3741	}
rahul_dahiya	0:fb8047b156bb	3742
rahul_dahiya	0:fb8047b156bb	3743	if( ssl->in_msgtype == MBEDTLS_SSL_MSG_HANDSHAKE )
rahul_dahiya	0:fb8047b156bb	3744	{
rahul_dahiya	0:fb8047b156bb	3745	mbedtls_ssl_update_handshake_status( ssl );
rahul_dahiya	0:fb8047b156bb	3746	}
rahul_dahiya	0:fb8047b156bb	3747	}
rahul_dahiya	0:fb8047b156bb	3748	else
rahul_dahiya	0:fb8047b156bb	3749	{
rahul_dahiya	0:fb8047b156bb	3750	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= reuse previously read message" ) );
rahul_dahiya	0:fb8047b156bb	3751	ssl->keep_current_message = 0;
rahul_dahiya	0:fb8047b156bb	3752	}
rahul_dahiya	0:fb8047b156bb	3753
rahul_dahiya	0:fb8047b156bb	3754	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= read record" ) );
rahul_dahiya	0:fb8047b156bb	3755
rahul_dahiya	0:fb8047b156bb	3756	return( 0 );
rahul_dahiya	0:fb8047b156bb	3757	}
rahul_dahiya	0:fb8047b156bb	3758
rahul_dahiya	0:fb8047b156bb	3759	int mbedtls_ssl_read_record_layer( mbedtls_ssl_context *ssl )
rahul_dahiya	0:fb8047b156bb	3760	{
rahul_dahiya	0:fb8047b156bb	3761	int ret;
rahul_dahiya	0:fb8047b156bb	3762
rahul_dahiya	0:fb8047b156bb	3763	/*
rahul_dahiya	0:fb8047b156bb	3764	* Step A
rahul_dahiya	0:fb8047b156bb	3765	*
rahul_dahiya	0:fb8047b156bb	3766	* Consume last content-layer message and potentially
rahul_dahiya	0:fb8047b156bb	3767	* update in_msglen which keeps track of the contents'
rahul_dahiya	0:fb8047b156bb	3768	* consumption state.
rahul_dahiya	0:fb8047b156bb	3769	*
rahul_dahiya	0:fb8047b156bb	3770	* (1) Handshake messages:
rahul_dahiya	0:fb8047b156bb	3771	* Remove last handshake message, move content
rahul_dahiya	0:fb8047b156bb	3772	* and adapt in_msglen.
rahul_dahiya	0:fb8047b156bb	3773	*
rahul_dahiya	0:fb8047b156bb	3774	* (2) Alert messages:
rahul_dahiya	0:fb8047b156bb	3775	* Consume whole record content, in_msglen = 0.
rahul_dahiya	0:fb8047b156bb	3776	*
rahul_dahiya	0:fb8047b156bb	3777	* NOTE: This needs to be fixed, since like for
rahul_dahiya	0:fb8047b156bb	3778	* handshake messages it is allowed to have
rahul_dahiya	0:fb8047b156bb	3779	* multiple alerts witin a single record.
rahul_dahiya	0:fb8047b156bb	3780	* Internal reference IOTSSL-1321.
rahul_dahiya	0:fb8047b156bb	3781	*
rahul_dahiya	0:fb8047b156bb	3782	* (3) Change cipher spec:
rahul_dahiya	0:fb8047b156bb	3783	* Consume whole record content, in_msglen = 0.
rahul_dahiya	0:fb8047b156bb	3784	*
rahul_dahiya	0:fb8047b156bb	3785	* (4) Application data:
rahul_dahiya	0:fb8047b156bb	3786	* Don't do anything - the record layer provides
rahul_dahiya	0:fb8047b156bb	3787	* the application data as a stream transport
rahul_dahiya	0:fb8047b156bb	3788	* and consumes through mbedtls_ssl_read only.
rahul_dahiya	0:fb8047b156bb	3789	*
rahul_dahiya	0:fb8047b156bb	3790	*/
rahul_dahiya	0:fb8047b156bb	3791
rahul_dahiya	0:fb8047b156bb	3792	/* Case (1): Handshake messages */
rahul_dahiya	0:fb8047b156bb	3793	if( ssl->in_hslen != 0 )
rahul_dahiya	0:fb8047b156bb	3794	{
rahul_dahiya	0:fb8047b156bb	3795	/* Hard assertion to be sure that no application data
rahul_dahiya	0:fb8047b156bb	3796	* is in flight, as corrupting ssl->in_msglen during
rahul_dahiya	0:fb8047b156bb	3797	* ssl->in_offt != NULL is fatal. */
rahul_dahiya	0:fb8047b156bb	3798	if( ssl->in_offt != NULL )
rahul_dahiya	0:fb8047b156bb	3799	{
rahul_dahiya	0:fb8047b156bb	3800	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
rahul_dahiya	0:fb8047b156bb	3801	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
rahul_dahiya	0:fb8047b156bb	3802	}
rahul_dahiya	0:fb8047b156bb	3803
rahul_dahiya	0:fb8047b156bb	3804	/*
rahul_dahiya	0:fb8047b156bb	3805	* Get next Handshake message in the current record
rahul_dahiya	0:fb8047b156bb	3806	*/
rahul_dahiya	0:fb8047b156bb	3807
rahul_dahiya	0:fb8047b156bb	3808	/* Notes:
rahul_dahiya	0:fb8047b156bb	3809	* (1) in_hslen is NOT necessarily the size of the
rahul_dahiya	0:fb8047b156bb	3810	* current handshake content: If DTLS handshake
rahul_dahiya	0:fb8047b156bb	3811	* fragmentation is used, that's the fragment
rahul_dahiya	0:fb8047b156bb	3812	* size instead. Using the total handshake message
rahul_dahiya	0:fb8047b156bb	3813	* size here is FAULTY and should be changed at
rahul_dahiya	0:fb8047b156bb	3814	* some point. Internal reference IOTSSL-1414.
rahul_dahiya	0:fb8047b156bb	3815	* (2) While it doesn't seem to cause problems, one
rahul_dahiya	0:fb8047b156bb	3816	* has to be very careful not to assume that in_hslen
rahul_dahiya	0:fb8047b156bb	3817	* is always <= in_msglen in a sensible communication.
rahul_dahiya	0:fb8047b156bb	3818	* Again, it's wrong for DTLS handshake fragmentation.
rahul_dahiya	0:fb8047b156bb	3819	* The following check is therefore mandatory, and
rahul_dahiya	0:fb8047b156bb	3820	* should not be treated as a silently corrected assertion.
rahul_dahiya	0:fb8047b156bb	3821	* Additionally, ssl->in_hslen might be arbitrarily out of
rahul_dahiya	0:fb8047b156bb	3822	* bounds after handling a DTLS message with an unexpected
rahul_dahiya	0:fb8047b156bb	3823	* sequence number, see mbedtls_ssl_prepare_handshake_record.
rahul_dahiya	0:fb8047b156bb	3824	*/
rahul_dahiya	0:fb8047b156bb	3825	if( ssl->in_hslen < ssl->in_msglen )
rahul_dahiya	0:fb8047b156bb	3826	{
rahul_dahiya	0:fb8047b156bb	3827	ssl->in_msglen -= ssl->in_hslen;
rahul_dahiya	0:fb8047b156bb	3828	memmove( ssl->in_msg, ssl->in_msg + ssl->in_hslen,
rahul_dahiya	0:fb8047b156bb	3829	ssl->in_msglen );
rahul_dahiya	0:fb8047b156bb	3830
rahul_dahiya	0:fb8047b156bb	3831	MBEDTLS_SSL_DEBUG_BUF( 4, "remaining content in record",
rahul_dahiya	0:fb8047b156bb	3832	ssl->in_msg, ssl->in_msglen );
rahul_dahiya	0:fb8047b156bb	3833	}
rahul_dahiya	0:fb8047b156bb	3834	else
rahul_dahiya	0:fb8047b156bb	3835	{
rahul_dahiya	0:fb8047b156bb	3836	ssl->in_msglen = 0;
rahul_dahiya	0:fb8047b156bb	3837	}
rahul_dahiya	0:fb8047b156bb	3838
rahul_dahiya	0:fb8047b156bb	3839	ssl->in_hslen = 0;
rahul_dahiya	0:fb8047b156bb	3840	}
rahul_dahiya	0:fb8047b156bb	3841	/* Case (4): Application data */
rahul_dahiya	0:fb8047b156bb	3842	else if( ssl->in_offt != NULL )
rahul_dahiya	0:fb8047b156bb	3843	{
rahul_dahiya	0:fb8047b156bb	3844	return( 0 );
rahul_dahiya	0:fb8047b156bb	3845	}
rahul_dahiya	0:fb8047b156bb	3846	/* Everything else (CCS & Alerts) */
rahul_dahiya	0:fb8047b156bb	3847	else
rahul_dahiya	0:fb8047b156bb	3848	{
rahul_dahiya	0:fb8047b156bb	3849	ssl->in_msglen = 0;
rahul_dahiya	0:fb8047b156bb	3850	}
rahul_dahiya	0:fb8047b156bb	3851
rahul_dahiya	0:fb8047b156bb	3852	/*
rahul_dahiya	0:fb8047b156bb	3853	* Step B
rahul_dahiya	0:fb8047b156bb	3854	*
rahul_dahiya	0:fb8047b156bb	3855	* Fetch and decode new record if current one is fully consumed.
rahul_dahiya	0:fb8047b156bb	3856	*
rahul_dahiya	0:fb8047b156bb	3857	*/
rahul_dahiya	0:fb8047b156bb	3858
rahul_dahiya	0:fb8047b156bb	3859	if( ssl->in_msglen > 0 )
rahul_dahiya	0:fb8047b156bb	3860	{
rahul_dahiya	0:fb8047b156bb	3861	/* There's something left to be processed in the current record. */
rahul_dahiya	0:fb8047b156bb	3862	return( 0 );
rahul_dahiya	0:fb8047b156bb	3863	}
rahul_dahiya	0:fb8047b156bb	3864
rahul_dahiya	0:fb8047b156bb	3865	/* Need to fetch a new record */
rahul_dahiya	0:fb8047b156bb	3866
rahul_dahiya	0:fb8047b156bb	3867	#if defined(MBEDTLS_SSL_PROTO_DTLS)
rahul_dahiya	0:fb8047b156bb	3868	read_record_header:
rahul_dahiya	0:fb8047b156bb	3869	#endif
rahul_dahiya	0:fb8047b156bb	3870
rahul_dahiya	0:fb8047b156bb	3871	/* Current record either fully processed or to be discarded. */
rahul_dahiya	0:fb8047b156bb	3872
rahul_dahiya	0:fb8047b156bb	3873	if( ( ret = mbedtls_ssl_fetch_input( ssl, mbedtls_ssl_hdr_len( ssl ) ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	3874	{
rahul_dahiya	0:fb8047b156bb	3875	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_fetch_input", ret );
rahul_dahiya	0:fb8047b156bb	3876	return( ret );
rahul_dahiya	0:fb8047b156bb	3877	}
rahul_dahiya	0:fb8047b156bb	3878
rahul_dahiya	0:fb8047b156bb	3879	if( ( ret = ssl_parse_record_header( ssl ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	3880	{
rahul_dahiya	0:fb8047b156bb	3881	#if defined(MBEDTLS_SSL_PROTO_DTLS)
rahul_dahiya	0:fb8047b156bb	3882	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM &&
rahul_dahiya	0:fb8047b156bb	3883	ret != MBEDTLS_ERR_SSL_CLIENT_RECONNECT )
rahul_dahiya	0:fb8047b156bb	3884	{
rahul_dahiya	0:fb8047b156bb	3885	if( ret == MBEDTLS_ERR_SSL_UNEXPECTED_RECORD )
rahul_dahiya	0:fb8047b156bb	3886	{
rahul_dahiya	0:fb8047b156bb	3887	/* Skip unexpected record (but not whole datagram) */
rahul_dahiya	0:fb8047b156bb	3888	ssl->next_record_offset = ssl->in_msglen
rahul_dahiya	0:fb8047b156bb	3889	+ mbedtls_ssl_hdr_len( ssl );
rahul_dahiya	0:fb8047b156bb	3890
rahul_dahiya	0:fb8047b156bb	3891	MBEDTLS_SSL_DEBUG_MSG( 1, ( "discarding unexpected record "
rahul_dahiya	0:fb8047b156bb	3892	"(header)" ) );
rahul_dahiya	0:fb8047b156bb	3893	}
rahul_dahiya	0:fb8047b156bb	3894	else
rahul_dahiya	0:fb8047b156bb	3895	{
rahul_dahiya	0:fb8047b156bb	3896	/* Skip invalid record and the rest of the datagram */
rahul_dahiya	0:fb8047b156bb	3897	ssl->next_record_offset = 0;
rahul_dahiya	0:fb8047b156bb	3898	ssl->in_left = 0;
rahul_dahiya	0:fb8047b156bb	3899
rahul_dahiya	0:fb8047b156bb	3900	MBEDTLS_SSL_DEBUG_MSG( 1, ( "discarding invalid record "
rahul_dahiya	0:fb8047b156bb	3901	"(header)" ) );
rahul_dahiya	0:fb8047b156bb	3902	}
rahul_dahiya	0:fb8047b156bb	3903
rahul_dahiya	0:fb8047b156bb	3904	/* Get next record */
rahul_dahiya	0:fb8047b156bb	3905	goto read_record_header;
rahul_dahiya	0:fb8047b156bb	3906	}
rahul_dahiya	0:fb8047b156bb	3907	#endif
rahul_dahiya	0:fb8047b156bb	3908	return( ret );
rahul_dahiya	0:fb8047b156bb	3909	}
rahul_dahiya	0:fb8047b156bb	3910
rahul_dahiya	0:fb8047b156bb	3911	/*
rahul_dahiya	0:fb8047b156bb	3912	* Read and optionally decrypt the message contents
rahul_dahiya	0:fb8047b156bb	3913	*/
rahul_dahiya	0:fb8047b156bb	3914	if( ( ret = mbedtls_ssl_fetch_input( ssl,
rahul_dahiya	0:fb8047b156bb	3915	mbedtls_ssl_hdr_len( ssl ) + ssl->in_msglen ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	3916	{
rahul_dahiya	0:fb8047b156bb	3917	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_fetch_input", ret );
rahul_dahiya	0:fb8047b156bb	3918	return( ret );
rahul_dahiya	0:fb8047b156bb	3919	}
rahul_dahiya	0:fb8047b156bb	3920
rahul_dahiya	0:fb8047b156bb	3921	/* Done reading this record, get ready for the next one */
rahul_dahiya	0:fb8047b156bb	3922	#if defined(MBEDTLS_SSL_PROTO_DTLS)
rahul_dahiya	0:fb8047b156bb	3923	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
rahul_dahiya	0:fb8047b156bb	3924	ssl->next_record_offset = ssl->in_msglen + mbedtls_ssl_hdr_len( ssl );
rahul_dahiya	0:fb8047b156bb	3925	else
rahul_dahiya	0:fb8047b156bb	3926	#endif
rahul_dahiya	0:fb8047b156bb	3927	ssl->in_left = 0;
rahul_dahiya	0:fb8047b156bb	3928
rahul_dahiya	0:fb8047b156bb	3929	if( ( ret = ssl_prepare_record_content( ssl ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	3930	{
rahul_dahiya	0:fb8047b156bb	3931	#if defined(MBEDTLS_SSL_PROTO_DTLS)
rahul_dahiya	0:fb8047b156bb	3932	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
rahul_dahiya	0:fb8047b156bb	3933	{
rahul_dahiya	0:fb8047b156bb	3934	/* Silently discard invalid records */
rahul_dahiya	0:fb8047b156bb	3935	if( ret == MBEDTLS_ERR_SSL_INVALID_RECORD \|\|
rahul_dahiya	0:fb8047b156bb	3936	ret == MBEDTLS_ERR_SSL_INVALID_MAC )
rahul_dahiya	0:fb8047b156bb	3937	{
rahul_dahiya	0:fb8047b156bb	3938	/* Except when waiting for Finished as a bad mac here
rahul_dahiya	0:fb8047b156bb	3939	* probably means something went wrong in the handshake
rahul_dahiya	0:fb8047b156bb	3940	* (eg wrong psk used, mitm downgrade attempt, etc.) */
rahul_dahiya	0:fb8047b156bb	3941	if( ssl->state == MBEDTLS_SSL_CLIENT_FINISHED \|\|
rahul_dahiya	0:fb8047b156bb	3942	ssl->state == MBEDTLS_SSL_SERVER_FINISHED )
rahul_dahiya	0:fb8047b156bb	3943	{
rahul_dahiya	0:fb8047b156bb	3944	#if defined(MBEDTLS_SSL_ALL_ALERT_MESSAGES)
rahul_dahiya	0:fb8047b156bb	3945	if( ret == MBEDTLS_ERR_SSL_INVALID_MAC )
rahul_dahiya	0:fb8047b156bb	3946	{
rahul_dahiya	0:fb8047b156bb	3947	mbedtls_ssl_send_alert_message( ssl,
rahul_dahiya	0:fb8047b156bb	3948	MBEDTLS_SSL_ALERT_LEVEL_FATAL,
rahul_dahiya	0:fb8047b156bb	3949	MBEDTLS_SSL_ALERT_MSG_BAD_RECORD_MAC );
rahul_dahiya	0:fb8047b156bb	3950	}
rahul_dahiya	0:fb8047b156bb	3951	#endif
rahul_dahiya	0:fb8047b156bb	3952	return( ret );
rahul_dahiya	0:fb8047b156bb	3953	}
rahul_dahiya	0:fb8047b156bb	3954
rahul_dahiya	0:fb8047b156bb	3955	#if defined(MBEDTLS_SSL_DTLS_BADMAC_LIMIT)
rahul_dahiya	0:fb8047b156bb	3956	if( ssl->conf->badmac_limit != 0 &&
rahul_dahiya	0:fb8047b156bb	3957	++ssl->badmac_seen >= ssl->conf->badmac_limit )
rahul_dahiya	0:fb8047b156bb	3958	{
rahul_dahiya	0:fb8047b156bb	3959	MBEDTLS_SSL_DEBUG_MSG( 1, ( "too many records with bad MAC" ) );
rahul_dahiya	0:fb8047b156bb	3960	return( MBEDTLS_ERR_SSL_INVALID_MAC );
rahul_dahiya	0:fb8047b156bb	3961	}
rahul_dahiya	0:fb8047b156bb	3962	#endif
rahul_dahiya	0:fb8047b156bb	3963
rahul_dahiya	0:fb8047b156bb	3964	/* As above, invalid records cause
rahul_dahiya	0:fb8047b156bb	3965	* dismissal of the whole datagram. */
rahul_dahiya	0:fb8047b156bb	3966
rahul_dahiya	0:fb8047b156bb	3967	ssl->next_record_offset = 0;
rahul_dahiya	0:fb8047b156bb	3968	ssl->in_left = 0;
rahul_dahiya	0:fb8047b156bb	3969
rahul_dahiya	0:fb8047b156bb	3970	MBEDTLS_SSL_DEBUG_MSG( 1, ( "discarding invalid record (mac)" ) );
rahul_dahiya	0:fb8047b156bb	3971	goto read_record_header;
rahul_dahiya	0:fb8047b156bb	3972	}
rahul_dahiya	0:fb8047b156bb	3973
rahul_dahiya	0:fb8047b156bb	3974	return( ret );
rahul_dahiya	0:fb8047b156bb	3975	}
rahul_dahiya	0:fb8047b156bb	3976	else
rahul_dahiya	0:fb8047b156bb	3977	#endif
rahul_dahiya	0:fb8047b156bb	3978	{
rahul_dahiya	0:fb8047b156bb	3979	/* Error out (and send alert) on invalid records */
rahul_dahiya	0:fb8047b156bb	3980	#if defined(MBEDTLS_SSL_ALL_ALERT_MESSAGES)
rahul_dahiya	0:fb8047b156bb	3981	if( ret == MBEDTLS_ERR_SSL_INVALID_MAC )
rahul_dahiya	0:fb8047b156bb	3982	{
rahul_dahiya	0:fb8047b156bb	3983	mbedtls_ssl_send_alert_message( ssl,
rahul_dahiya	0:fb8047b156bb	3984	MBEDTLS_SSL_ALERT_LEVEL_FATAL,
rahul_dahiya	0:fb8047b156bb	3985	MBEDTLS_SSL_ALERT_MSG_BAD_RECORD_MAC );
rahul_dahiya	0:fb8047b156bb	3986	}
rahul_dahiya	0:fb8047b156bb	3987	#endif
rahul_dahiya	0:fb8047b156bb	3988	return( ret );
rahul_dahiya	0:fb8047b156bb	3989	}
rahul_dahiya	0:fb8047b156bb	3990	}
rahul_dahiya	0:fb8047b156bb	3991
rahul_dahiya	0:fb8047b156bb	3992	/*
rahul_dahiya	0:fb8047b156bb	3993	* When we sent the last flight of the handshake, we MUST respond to a
rahul_dahiya	0:fb8047b156bb	3994	* retransmit of the peer's previous flight with a retransmit. (In
rahul_dahiya	0:fb8047b156bb	3995	* practice, only the Finished message will make it, other messages
rahul_dahiya	0:fb8047b156bb	3996	* including CCS use the old transform so they're dropped as invalid.)
rahul_dahiya	0:fb8047b156bb	3997	*
rahul_dahiya	0:fb8047b156bb	3998	* If the record we received is not a handshake message, however, it
rahul_dahiya	0:fb8047b156bb	3999	* means the peer received our last flight so we can clean up
rahul_dahiya	0:fb8047b156bb	4000	* handshake info.
rahul_dahiya	0:fb8047b156bb	4001	*
rahul_dahiya	0:fb8047b156bb	4002	* This check needs to be done before prepare_handshake() due to an edge
rahul_dahiya	0:fb8047b156bb	4003	* case: if the client immediately requests renegotiation, this
rahul_dahiya	0:fb8047b156bb	4004	* finishes the current handshake first, avoiding the new ClientHello
rahul_dahiya	0:fb8047b156bb	4005	* being mistaken for an ancient message in the current handshake.
rahul_dahiya	0:fb8047b156bb	4006	*/
rahul_dahiya	0:fb8047b156bb	4007	#if defined(MBEDTLS_SSL_PROTO_DTLS)
rahul_dahiya	0:fb8047b156bb	4008	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM &&
rahul_dahiya	0:fb8047b156bb	4009	ssl->handshake != NULL &&
rahul_dahiya	0:fb8047b156bb	4010	ssl->state == MBEDTLS_SSL_HANDSHAKE_OVER )
rahul_dahiya	0:fb8047b156bb	4011	{
rahul_dahiya	0:fb8047b156bb	4012	if( ssl->in_msgtype == MBEDTLS_SSL_MSG_HANDSHAKE &&
rahul_dahiya	0:fb8047b156bb	4013	ssl->in_msg[0] == MBEDTLS_SSL_HS_FINISHED )
rahul_dahiya	0:fb8047b156bb	4014	{
rahul_dahiya	0:fb8047b156bb	4015	MBEDTLS_SSL_DEBUG_MSG( 2, ( "received retransmit of last flight" ) );
rahul_dahiya	0:fb8047b156bb	4016
rahul_dahiya	0:fb8047b156bb	4017	if( ( ret = mbedtls_ssl_resend( ssl ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	4018	{
rahul_dahiya	0:fb8047b156bb	4019	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_resend", ret );
rahul_dahiya	0:fb8047b156bb	4020	return( ret );
rahul_dahiya	0:fb8047b156bb	4021	}
rahul_dahiya	0:fb8047b156bb	4022
rahul_dahiya	0:fb8047b156bb	4023	return( MBEDTLS_ERR_SSL_WANT_READ );
rahul_dahiya	0:fb8047b156bb	4024	}
rahul_dahiya	0:fb8047b156bb	4025	else
rahul_dahiya	0:fb8047b156bb	4026	{
rahul_dahiya	0:fb8047b156bb	4027	ssl_handshake_wrapup_free_hs_transform( ssl );
rahul_dahiya	0:fb8047b156bb	4028	}
rahul_dahiya	0:fb8047b156bb	4029	}
rahul_dahiya	0:fb8047b156bb	4030	#endif
rahul_dahiya	0:fb8047b156bb	4031
rahul_dahiya	0:fb8047b156bb	4032	return( 0 );
rahul_dahiya	0:fb8047b156bb	4033	}
rahul_dahiya	0:fb8047b156bb	4034
rahul_dahiya	0:fb8047b156bb	4035	int mbedtls_ssl_handle_message_type( mbedtls_ssl_context *ssl )
rahul_dahiya	0:fb8047b156bb	4036	{
rahul_dahiya	0:fb8047b156bb	4037	int ret;
rahul_dahiya	0:fb8047b156bb	4038
rahul_dahiya	0:fb8047b156bb	4039	/*
rahul_dahiya	0:fb8047b156bb	4040	* Handle particular types of records
rahul_dahiya	0:fb8047b156bb	4041	*/
rahul_dahiya	0:fb8047b156bb	4042	if( ssl->in_msgtype == MBEDTLS_SSL_MSG_HANDSHAKE )
rahul_dahiya	0:fb8047b156bb	4043	{
rahul_dahiya	0:fb8047b156bb	4044	if( ( ret = mbedtls_ssl_prepare_handshake_record( ssl ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	4045	{
rahul_dahiya	0:fb8047b156bb	4046	return( ret );
rahul_dahiya	0:fb8047b156bb	4047	}
rahul_dahiya	0:fb8047b156bb	4048	}
rahul_dahiya	0:fb8047b156bb	4049
rahul_dahiya	0:fb8047b156bb	4050	if( ssl->in_msgtype == MBEDTLS_SSL_MSG_ALERT )
rahul_dahiya	0:fb8047b156bb	4051	{
rahul_dahiya	0:fb8047b156bb	4052	MBEDTLS_SSL_DEBUG_MSG( 2, ( "got an alert message, type: [%d:%d]",
rahul_dahiya	0:fb8047b156bb	4053	ssl->in_msg[0], ssl->in_msg[1] ) );
rahul_dahiya	0:fb8047b156bb	4054
rahul_dahiya	0:fb8047b156bb	4055	/*
rahul_dahiya	0:fb8047b156bb	4056	* Ignore non-fatal alerts, except close_notify and no_renegotiation
rahul_dahiya	0:fb8047b156bb	4057	*/
rahul_dahiya	0:fb8047b156bb	4058	if( ssl->in_msg[0] == MBEDTLS_SSL_ALERT_LEVEL_FATAL )
rahul_dahiya	0:fb8047b156bb	4059	{
rahul_dahiya	0:fb8047b156bb	4060	MBEDTLS_SSL_DEBUG_MSG( 1, ( "is a fatal alert message (msg %d)",
rahul_dahiya	0:fb8047b156bb	4061	ssl->in_msg[1] ) );
rahul_dahiya	0:fb8047b156bb	4062	return( MBEDTLS_ERR_SSL_FATAL_ALERT_MESSAGE );
rahul_dahiya	0:fb8047b156bb	4063	}
rahul_dahiya	0:fb8047b156bb	4064
rahul_dahiya	0:fb8047b156bb	4065	if( ssl->in_msg[0] == MBEDTLS_SSL_ALERT_LEVEL_WARNING &&
rahul_dahiya	0:fb8047b156bb	4066	ssl->in_msg[1] == MBEDTLS_SSL_ALERT_MSG_CLOSE_NOTIFY )
rahul_dahiya	0:fb8047b156bb	4067	{
rahul_dahiya	0:fb8047b156bb	4068	MBEDTLS_SSL_DEBUG_MSG( 2, ( "is a close notify message" ) );
rahul_dahiya	0:fb8047b156bb	4069	return( MBEDTLS_ERR_SSL_PEER_CLOSE_NOTIFY );
rahul_dahiya	0:fb8047b156bb	4070	}
rahul_dahiya	0:fb8047b156bb	4071
rahul_dahiya	0:fb8047b156bb	4072	#if defined(MBEDTLS_SSL_RENEGOTIATION_ENABLED)
rahul_dahiya	0:fb8047b156bb	4073	if( ssl->in_msg[0] == MBEDTLS_SSL_ALERT_LEVEL_WARNING &&
rahul_dahiya	0:fb8047b156bb	4074	ssl->in_msg[1] == MBEDTLS_SSL_ALERT_MSG_NO_RENEGOTIATION )
rahul_dahiya	0:fb8047b156bb	4075	{
rahul_dahiya	0:fb8047b156bb	4076	MBEDTLS_SSL_DEBUG_MSG( 2, ( "is a SSLv3 no_cert" ) );
rahul_dahiya	0:fb8047b156bb	4077	/* Will be handled when trying to parse ServerHello */
rahul_dahiya	0:fb8047b156bb	4078	return( 0 );
rahul_dahiya	0:fb8047b156bb	4079	}
rahul_dahiya	0:fb8047b156bb	4080	#endif
rahul_dahiya	0:fb8047b156bb	4081
rahul_dahiya	0:fb8047b156bb	4082	#if defined(MBEDTLS_SSL_PROTO_SSL3) && defined(MBEDTLS_SSL_SRV_C)
rahul_dahiya	0:fb8047b156bb	4083	if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 &&
rahul_dahiya	0:fb8047b156bb	4084	ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER &&
rahul_dahiya	0:fb8047b156bb	4085	ssl->in_msg[0] == MBEDTLS_SSL_ALERT_LEVEL_WARNING &&
rahul_dahiya	0:fb8047b156bb	4086	ssl->in_msg[1] == MBEDTLS_SSL_ALERT_MSG_NO_CERT )
rahul_dahiya	0:fb8047b156bb	4087	{
rahul_dahiya	0:fb8047b156bb	4088	MBEDTLS_SSL_DEBUG_MSG( 2, ( "is a SSLv3 no_cert" ) );
rahul_dahiya	0:fb8047b156bb	4089	/* Will be handled in mbedtls_ssl_parse_certificate() */
rahul_dahiya	0:fb8047b156bb	4090	return( 0 );
rahul_dahiya	0:fb8047b156bb	4091	}
rahul_dahiya	0:fb8047b156bb	4092	#endif /* MBEDTLS_SSL_PROTO_SSL3 && MBEDTLS_SSL_SRV_C */
rahul_dahiya	0:fb8047b156bb	4093
rahul_dahiya	0:fb8047b156bb	4094	/* Silently ignore: fetch new message */
rahul_dahiya	0:fb8047b156bb	4095	return MBEDTLS_ERR_SSL_NON_FATAL;
rahul_dahiya	0:fb8047b156bb	4096	}
rahul_dahiya	0:fb8047b156bb	4097
rahul_dahiya	0:fb8047b156bb	4098	return( 0 );
rahul_dahiya	0:fb8047b156bb	4099	}
rahul_dahiya	0:fb8047b156bb	4100
rahul_dahiya	0:fb8047b156bb	4101	int mbedtls_ssl_send_fatal_handshake_failure( mbedtls_ssl_context *ssl )
rahul_dahiya	0:fb8047b156bb	4102	{
rahul_dahiya	0:fb8047b156bb	4103	int ret;
rahul_dahiya	0:fb8047b156bb	4104
rahul_dahiya	0:fb8047b156bb	4105	if( ( ret = mbedtls_ssl_send_alert_message( ssl,
rahul_dahiya	0:fb8047b156bb	4106	MBEDTLS_SSL_ALERT_LEVEL_FATAL,
rahul_dahiya	0:fb8047b156bb	4107	MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	4108	{
rahul_dahiya	0:fb8047b156bb	4109	return( ret );
rahul_dahiya	0:fb8047b156bb	4110	}
rahul_dahiya	0:fb8047b156bb	4111
rahul_dahiya	0:fb8047b156bb	4112	return( 0 );
rahul_dahiya	0:fb8047b156bb	4113	}
rahul_dahiya	0:fb8047b156bb	4114
rahul_dahiya	0:fb8047b156bb	4115	int mbedtls_ssl_send_alert_message( mbedtls_ssl_context *ssl,
rahul_dahiya	0:fb8047b156bb	4116	unsigned char level,
rahul_dahiya	0:fb8047b156bb	4117	unsigned char message )
rahul_dahiya	0:fb8047b156bb	4118	{
rahul_dahiya	0:fb8047b156bb	4119	int ret;
rahul_dahiya	0:fb8047b156bb	4120
rahul_dahiya	0:fb8047b156bb	4121	if( ssl == NULL \|\| ssl->conf == NULL )
rahul_dahiya	0:fb8047b156bb	4122	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
rahul_dahiya	0:fb8047b156bb	4123
rahul_dahiya	0:fb8047b156bb	4124	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> send alert message" ) );
rahul_dahiya	0:fb8047b156bb	4125	MBEDTLS_SSL_DEBUG_MSG( 3, ( "send alert level=%u message=%u", level, message ));
rahul_dahiya	0:fb8047b156bb	4126
rahul_dahiya	0:fb8047b156bb	4127	ssl->out_msgtype = MBEDTLS_SSL_MSG_ALERT;
rahul_dahiya	0:fb8047b156bb	4128	ssl->out_msglen = 2;
rahul_dahiya	0:fb8047b156bb	4129	ssl->out_msg[0] = level;
rahul_dahiya	0:fb8047b156bb	4130	ssl->out_msg[1] = message;
rahul_dahiya	0:fb8047b156bb	4131
rahul_dahiya	0:fb8047b156bb	4132	if( ( ret = mbedtls_ssl_write_record( ssl ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	4133	{
rahul_dahiya	0:fb8047b156bb	4134	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_write_record", ret );
rahul_dahiya	0:fb8047b156bb	4135	return( ret );
rahul_dahiya	0:fb8047b156bb	4136	}
rahul_dahiya	0:fb8047b156bb	4137	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= send alert message" ) );
rahul_dahiya	0:fb8047b156bb	4138
rahul_dahiya	0:fb8047b156bb	4139	return( 0 );
rahul_dahiya	0:fb8047b156bb	4140	}
rahul_dahiya	0:fb8047b156bb	4141
rahul_dahiya	0:fb8047b156bb	4142	/*
rahul_dahiya	0:fb8047b156bb	4143	* Handshake functions
rahul_dahiya	0:fb8047b156bb	4144	*/
rahul_dahiya	0:fb8047b156bb	4145	#if !defined(MBEDTLS_KEY_EXCHANGE_RSA_ENABLED) && \
rahul_dahiya	0:fb8047b156bb	4146	!defined(MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED) && \
rahul_dahiya	0:fb8047b156bb	4147	!defined(MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED) && \
rahul_dahiya	0:fb8047b156bb	4148	!defined(MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED) && \
rahul_dahiya	0:fb8047b156bb	4149	!defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED) && \
rahul_dahiya	0:fb8047b156bb	4150	!defined(MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED) && \
rahul_dahiya	0:fb8047b156bb	4151	!defined(MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED)
rahul_dahiya	0:fb8047b156bb	4152	/* No certificate support -> dummy functions */
rahul_dahiya	0:fb8047b156bb	4153	int mbedtls_ssl_write_certificate( mbedtls_ssl_context *ssl )
rahul_dahiya	0:fb8047b156bb	4154	{
rahul_dahiya	0:fb8047b156bb	4155	const mbedtls_ssl_ciphersuite_t *ciphersuite_info = ssl->transform_negotiate->ciphersuite_info;
rahul_dahiya	0:fb8047b156bb	4156
rahul_dahiya	0:fb8047b156bb	4157	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write certificate" ) );
rahul_dahiya	0:fb8047b156bb	4158
rahul_dahiya	0:fb8047b156bb	4159	if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_PSK \|\|
rahul_dahiya	0:fb8047b156bb	4160	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_DHE_PSK \|\|
rahul_dahiya	0:fb8047b156bb	4161	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_PSK \|\|
rahul_dahiya	0:fb8047b156bb	4162	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECJPAKE )
rahul_dahiya	0:fb8047b156bb	4163	{
rahul_dahiya	0:fb8047b156bb	4164	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip write certificate" ) );
rahul_dahiya	0:fb8047b156bb	4165	ssl->state++;
rahul_dahiya	0:fb8047b156bb	4166	return( 0 );
rahul_dahiya	0:fb8047b156bb	4167	}
rahul_dahiya	0:fb8047b156bb	4168
rahul_dahiya	0:fb8047b156bb	4169	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
rahul_dahiya	0:fb8047b156bb	4170	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
rahul_dahiya	0:fb8047b156bb	4171	}
rahul_dahiya	0:fb8047b156bb	4172
rahul_dahiya	0:fb8047b156bb	4173	int mbedtls_ssl_parse_certificate( mbedtls_ssl_context *ssl )
rahul_dahiya	0:fb8047b156bb	4174	{
rahul_dahiya	0:fb8047b156bb	4175	const mbedtls_ssl_ciphersuite_t *ciphersuite_info = ssl->transform_negotiate->ciphersuite_info;
rahul_dahiya	0:fb8047b156bb	4176
rahul_dahiya	0:fb8047b156bb	4177	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> parse certificate" ) );
rahul_dahiya	0:fb8047b156bb	4178
rahul_dahiya	0:fb8047b156bb	4179	if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_PSK \|\|
rahul_dahiya	0:fb8047b156bb	4180	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_DHE_PSK \|\|
rahul_dahiya	0:fb8047b156bb	4181	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_PSK \|\|
rahul_dahiya	0:fb8047b156bb	4182	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECJPAKE )
rahul_dahiya	0:fb8047b156bb	4183	{
rahul_dahiya	0:fb8047b156bb	4184	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip parse certificate" ) );
rahul_dahiya	0:fb8047b156bb	4185	ssl->state++;
rahul_dahiya	0:fb8047b156bb	4186	return( 0 );
rahul_dahiya	0:fb8047b156bb	4187	}
rahul_dahiya	0:fb8047b156bb	4188
rahul_dahiya	0:fb8047b156bb	4189	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
rahul_dahiya	0:fb8047b156bb	4190	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
rahul_dahiya	0:fb8047b156bb	4191	}
rahul_dahiya	0:fb8047b156bb	4192
rahul_dahiya	0:fb8047b156bb	4193	#else
rahul_dahiya	0:fb8047b156bb	4194	/* Some certificate support -> implement write and parse */
rahul_dahiya	0:fb8047b156bb	4195
rahul_dahiya	0:fb8047b156bb	4196	int mbedtls_ssl_write_certificate( mbedtls_ssl_context *ssl )
rahul_dahiya	0:fb8047b156bb	4197	{
rahul_dahiya	0:fb8047b156bb	4198	int ret = MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE;
rahul_dahiya	0:fb8047b156bb	4199	size_t i, n;
rahul_dahiya	0:fb8047b156bb	4200	const mbedtls_x509_crt *crt;
rahul_dahiya	0:fb8047b156bb	4201	const mbedtls_ssl_ciphersuite_t *ciphersuite_info = ssl->transform_negotiate->ciphersuite_info;
rahul_dahiya	0:fb8047b156bb	4202
rahul_dahiya	0:fb8047b156bb	4203	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write certificate" ) );
rahul_dahiya	0:fb8047b156bb	4204
rahul_dahiya	0:fb8047b156bb	4205	if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_PSK \|\|
rahul_dahiya	0:fb8047b156bb	4206	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_DHE_PSK \|\|
rahul_dahiya	0:fb8047b156bb	4207	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_PSK \|\|
rahul_dahiya	0:fb8047b156bb	4208	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECJPAKE )
rahul_dahiya	0:fb8047b156bb	4209	{
rahul_dahiya	0:fb8047b156bb	4210	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip write certificate" ) );
rahul_dahiya	0:fb8047b156bb	4211	ssl->state++;
rahul_dahiya	0:fb8047b156bb	4212	return( 0 );
rahul_dahiya	0:fb8047b156bb	4213	}
rahul_dahiya	0:fb8047b156bb	4214
rahul_dahiya	0:fb8047b156bb	4215	#if defined(MBEDTLS_SSL_CLI_C)
rahul_dahiya	0:fb8047b156bb	4216	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_CLIENT )
rahul_dahiya	0:fb8047b156bb	4217	{
rahul_dahiya	0:fb8047b156bb	4218	if( ssl->client_auth == 0 )
rahul_dahiya	0:fb8047b156bb	4219	{
rahul_dahiya	0:fb8047b156bb	4220	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip write certificate" ) );
rahul_dahiya	0:fb8047b156bb	4221	ssl->state++;
rahul_dahiya	0:fb8047b156bb	4222	return( 0 );
rahul_dahiya	0:fb8047b156bb	4223	}
rahul_dahiya	0:fb8047b156bb	4224
rahul_dahiya	0:fb8047b156bb	4225	#if defined(MBEDTLS_SSL_PROTO_SSL3)
rahul_dahiya	0:fb8047b156bb	4226	/*
rahul_dahiya	0:fb8047b156bb	4227	* If using SSLv3 and got no cert, send an Alert message
rahul_dahiya	0:fb8047b156bb	4228	* (otherwise an empty Certificate message will be sent).
rahul_dahiya	0:fb8047b156bb	4229	*/
rahul_dahiya	0:fb8047b156bb	4230	if( mbedtls_ssl_own_cert( ssl ) == NULL &&
rahul_dahiya	0:fb8047b156bb	4231	ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 )
rahul_dahiya	0:fb8047b156bb	4232	{
rahul_dahiya	0:fb8047b156bb	4233	ssl->out_msglen = 2;
rahul_dahiya	0:fb8047b156bb	4234	ssl->out_msgtype = MBEDTLS_SSL_MSG_ALERT;
rahul_dahiya	0:fb8047b156bb	4235	ssl->out_msg[0] = MBEDTLS_SSL_ALERT_LEVEL_WARNING;
rahul_dahiya	0:fb8047b156bb	4236	ssl->out_msg[1] = MBEDTLS_SSL_ALERT_MSG_NO_CERT;
rahul_dahiya	0:fb8047b156bb	4237
rahul_dahiya	0:fb8047b156bb	4238	MBEDTLS_SSL_DEBUG_MSG( 2, ( "got no certificate to send" ) );
rahul_dahiya	0:fb8047b156bb	4239	goto write_msg;
rahul_dahiya	0:fb8047b156bb	4240	}
rahul_dahiya	0:fb8047b156bb	4241	#endif /* MBEDTLS_SSL_PROTO_SSL3 */
rahul_dahiya	0:fb8047b156bb	4242	}
rahul_dahiya	0:fb8047b156bb	4243	#endif /* MBEDTLS_SSL_CLI_C */
rahul_dahiya	0:fb8047b156bb	4244	#if defined(MBEDTLS_SSL_SRV_C)
rahul_dahiya	0:fb8047b156bb	4245	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER )
rahul_dahiya	0:fb8047b156bb	4246	{
rahul_dahiya	0:fb8047b156bb	4247	if( mbedtls_ssl_own_cert( ssl ) == NULL )
rahul_dahiya	0:fb8047b156bb	4248	{
rahul_dahiya	0:fb8047b156bb	4249	MBEDTLS_SSL_DEBUG_MSG( 1, ( "got no certificate to send" ) );
rahul_dahiya	0:fb8047b156bb	4250	return( MBEDTLS_ERR_SSL_CERTIFICATE_REQUIRED );
rahul_dahiya	0:fb8047b156bb	4251	}
rahul_dahiya	0:fb8047b156bb	4252	}
rahul_dahiya	0:fb8047b156bb	4253	#endif
rahul_dahiya	0:fb8047b156bb	4254
rahul_dahiya	0:fb8047b156bb	4255	MBEDTLS_SSL_DEBUG_CRT( 3, "own certificate", mbedtls_ssl_own_cert( ssl ) );
rahul_dahiya	0:fb8047b156bb	4256
rahul_dahiya	0:fb8047b156bb	4257	/*
rahul_dahiya	0:fb8047b156bb	4258	* 0 . 0 handshake type
rahul_dahiya	0:fb8047b156bb	4259	* 1 . 3 handshake length
rahul_dahiya	0:fb8047b156bb	4260	* 4 . 6 length of all certs
rahul_dahiya	0:fb8047b156bb	4261	* 7 . 9 length of cert. 1
rahul_dahiya	0:fb8047b156bb	4262	* 10 . n-1 peer certificate
rahul_dahiya	0:fb8047b156bb	4263	* n . n+2 length of cert. 2
rahul_dahiya	0:fb8047b156bb	4264	* n+3 . ... upper level cert, etc.
rahul_dahiya	0:fb8047b156bb	4265	*/
rahul_dahiya	0:fb8047b156bb	4266	i = 7;
rahul_dahiya	0:fb8047b156bb	4267	crt = mbedtls_ssl_own_cert( ssl );
rahul_dahiya	0:fb8047b156bb	4268
rahul_dahiya	0:fb8047b156bb	4269	while( crt != NULL )
rahul_dahiya	0:fb8047b156bb	4270	{
rahul_dahiya	0:fb8047b156bb	4271	n = crt->raw.len;
rahul_dahiya	0:fb8047b156bb	4272	if( n > MBEDTLS_SSL_MAX_CONTENT_LEN - 3 - i )
rahul_dahiya	0:fb8047b156bb	4273	{
rahul_dahiya	0:fb8047b156bb	4274	MBEDTLS_SSL_DEBUG_MSG( 1, ( "certificate too large, %d > %d",
rahul_dahiya	0:fb8047b156bb	4275	i + 3 + n, MBEDTLS_SSL_MAX_CONTENT_LEN ) );
rahul_dahiya	0:fb8047b156bb	4276	return( MBEDTLS_ERR_SSL_CERTIFICATE_TOO_LARGE );
rahul_dahiya	0:fb8047b156bb	4277	}
rahul_dahiya	0:fb8047b156bb	4278
rahul_dahiya	0:fb8047b156bb	4279	ssl->out_msg[i ] = (unsigned char)( n >> 16 );
rahul_dahiya	0:fb8047b156bb	4280	ssl->out_msg[i + 1] = (unsigned char)( n >> 8 );
rahul_dahiya	0:fb8047b156bb	4281	ssl->out_msg[i + 2] = (unsigned char)( n );
rahul_dahiya	0:fb8047b156bb	4282
rahul_dahiya	0:fb8047b156bb	4283	i += 3; memcpy( ssl->out_msg + i, crt->raw.p, n );
rahul_dahiya	0:fb8047b156bb	4284	i += n; crt = crt->next;
rahul_dahiya	0:fb8047b156bb	4285	}
rahul_dahiya	0:fb8047b156bb	4286
rahul_dahiya	0:fb8047b156bb	4287	ssl->out_msg[4] = (unsigned char)( ( i - 7 ) >> 16 );
rahul_dahiya	0:fb8047b156bb	4288	ssl->out_msg[5] = (unsigned char)( ( i - 7 ) >> 8 );
rahul_dahiya	0:fb8047b156bb	4289	ssl->out_msg[6] = (unsigned char)( ( i - 7 ) );
rahul_dahiya	0:fb8047b156bb	4290
rahul_dahiya	0:fb8047b156bb	4291	ssl->out_msglen = i;
rahul_dahiya	0:fb8047b156bb	4292	ssl->out_msgtype = MBEDTLS_SSL_MSG_HANDSHAKE;
rahul_dahiya	0:fb8047b156bb	4293	ssl->out_msg[0] = MBEDTLS_SSL_HS_CERTIFICATE;
rahul_dahiya	0:fb8047b156bb	4294
rahul_dahiya	0:fb8047b156bb	4295	#if defined(MBEDTLS_SSL_PROTO_SSL3) && defined(MBEDTLS_SSL_CLI_C)
rahul_dahiya	0:fb8047b156bb	4296	write_msg:
rahul_dahiya	0:fb8047b156bb	4297	#endif
rahul_dahiya	0:fb8047b156bb	4298
rahul_dahiya	0:fb8047b156bb	4299	ssl->state++;
rahul_dahiya	0:fb8047b156bb	4300
rahul_dahiya	0:fb8047b156bb	4301	if( ( ret = mbedtls_ssl_write_record( ssl ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	4302	{
rahul_dahiya	0:fb8047b156bb	4303	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_write_record", ret );
rahul_dahiya	0:fb8047b156bb	4304	return( ret );
rahul_dahiya	0:fb8047b156bb	4305	}
rahul_dahiya	0:fb8047b156bb	4306
rahul_dahiya	0:fb8047b156bb	4307	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= write certificate" ) );
rahul_dahiya	0:fb8047b156bb	4308
rahul_dahiya	0:fb8047b156bb	4309	return( ret );
rahul_dahiya	0:fb8047b156bb	4310	}
rahul_dahiya	0:fb8047b156bb	4311
rahul_dahiya	0:fb8047b156bb	4312	int mbedtls_ssl_parse_certificate( mbedtls_ssl_context *ssl )
rahul_dahiya	0:fb8047b156bb	4313	{
rahul_dahiya	0:fb8047b156bb	4314	int ret = MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE;
rahul_dahiya	0:fb8047b156bb	4315	size_t i, n;
rahul_dahiya	0:fb8047b156bb	4316	const mbedtls_ssl_ciphersuite_t *ciphersuite_info = ssl->transform_negotiate->ciphersuite_info;
rahul_dahiya	0:fb8047b156bb	4317	int authmode = ssl->conf->authmode;
rahul_dahiya	0:fb8047b156bb	4318	uint8_t alert;
rahul_dahiya	0:fb8047b156bb	4319
rahul_dahiya	0:fb8047b156bb	4320	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> parse certificate" ) );
rahul_dahiya	0:fb8047b156bb	4321
rahul_dahiya	0:fb8047b156bb	4322	if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_PSK \|\|
rahul_dahiya	0:fb8047b156bb	4323	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_DHE_PSK \|\|
rahul_dahiya	0:fb8047b156bb	4324	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_PSK \|\|
rahul_dahiya	0:fb8047b156bb	4325	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECJPAKE )
rahul_dahiya	0:fb8047b156bb	4326	{
rahul_dahiya	0:fb8047b156bb	4327	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip parse certificate" ) );
rahul_dahiya	0:fb8047b156bb	4328	ssl->state++;
rahul_dahiya	0:fb8047b156bb	4329	return( 0 );
rahul_dahiya	0:fb8047b156bb	4330	}
rahul_dahiya	0:fb8047b156bb	4331
rahul_dahiya	0:fb8047b156bb	4332	#if defined(MBEDTLS_SSL_SRV_C)
rahul_dahiya	0:fb8047b156bb	4333	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER &&
rahul_dahiya	0:fb8047b156bb	4334	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_RSA_PSK )
rahul_dahiya	0:fb8047b156bb	4335	{
rahul_dahiya	0:fb8047b156bb	4336	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip parse certificate" ) );
rahul_dahiya	0:fb8047b156bb	4337	ssl->state++;
rahul_dahiya	0:fb8047b156bb	4338	return( 0 );
rahul_dahiya	0:fb8047b156bb	4339	}
rahul_dahiya	0:fb8047b156bb	4340
rahul_dahiya	0:fb8047b156bb	4341	#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
rahul_dahiya	0:fb8047b156bb	4342	if( ssl->handshake->sni_authmode != MBEDTLS_SSL_VERIFY_UNSET )
rahul_dahiya	0:fb8047b156bb	4343	authmode = ssl->handshake->sni_authmode;
rahul_dahiya	0:fb8047b156bb	4344	#endif
rahul_dahiya	0:fb8047b156bb	4345
rahul_dahiya	0:fb8047b156bb	4346	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER &&
rahul_dahiya	0:fb8047b156bb	4347	authmode == MBEDTLS_SSL_VERIFY_NONE )
rahul_dahiya	0:fb8047b156bb	4348	{
rahul_dahiya	0:fb8047b156bb	4349	ssl->session_negotiate->verify_result = MBEDTLS_X509_BADCERT_SKIP_VERIFY;
rahul_dahiya	0:fb8047b156bb	4350	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip parse certificate" ) );
rahul_dahiya	0:fb8047b156bb	4351	ssl->state++;
rahul_dahiya	0:fb8047b156bb	4352	return( 0 );
rahul_dahiya	0:fb8047b156bb	4353	}
rahul_dahiya	0:fb8047b156bb	4354	#endif
rahul_dahiya	0:fb8047b156bb	4355
rahul_dahiya	0:fb8047b156bb	4356	if( ( ret = mbedtls_ssl_read_record( ssl ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	4357	{
rahul_dahiya	0:fb8047b156bb	4358	/* mbedtls_ssl_read_record may have sent an alert already. We
rahul_dahiya	0:fb8047b156bb	4359	let it decide whether to alert. */
rahul_dahiya	0:fb8047b156bb	4360	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_read_record", ret );
rahul_dahiya	0:fb8047b156bb	4361	return( ret );
rahul_dahiya	0:fb8047b156bb	4362	}
rahul_dahiya	0:fb8047b156bb	4363
rahul_dahiya	0:fb8047b156bb	4364	ssl->state++;
rahul_dahiya	0:fb8047b156bb	4365
rahul_dahiya	0:fb8047b156bb	4366	#if defined(MBEDTLS_SSL_SRV_C)
rahul_dahiya	0:fb8047b156bb	4367	#if defined(MBEDTLS_SSL_PROTO_SSL3)
rahul_dahiya	0:fb8047b156bb	4368	/*
rahul_dahiya	0:fb8047b156bb	4369	* Check if the client sent an empty certificate
rahul_dahiya	0:fb8047b156bb	4370	*/
rahul_dahiya	0:fb8047b156bb	4371	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER &&
rahul_dahiya	0:fb8047b156bb	4372	ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 )
rahul_dahiya	0:fb8047b156bb	4373	{
rahul_dahiya	0:fb8047b156bb	4374	if( ssl->in_msglen == 2 &&
rahul_dahiya	0:fb8047b156bb	4375	ssl->in_msgtype == MBEDTLS_SSL_MSG_ALERT &&
rahul_dahiya	0:fb8047b156bb	4376	ssl->in_msg[0] == MBEDTLS_SSL_ALERT_LEVEL_WARNING &&
rahul_dahiya	0:fb8047b156bb	4377	ssl->in_msg[1] == MBEDTLS_SSL_ALERT_MSG_NO_CERT )
rahul_dahiya	0:fb8047b156bb	4378	{
rahul_dahiya	0:fb8047b156bb	4379	MBEDTLS_SSL_DEBUG_MSG( 1, ( "SSLv3 client has no certificate" ) );
rahul_dahiya	0:fb8047b156bb	4380
rahul_dahiya	0:fb8047b156bb	4381	/* The client was asked for a certificate but didn't send
rahul_dahiya	0:fb8047b156bb	4382	one. The client should know what's going on, so we
rahul_dahiya	0:fb8047b156bb	4383	don't send an alert. */
rahul_dahiya	0:fb8047b156bb	4384	ssl->session_negotiate->verify_result = MBEDTLS_X509_BADCERT_MISSING;
rahul_dahiya	0:fb8047b156bb	4385	if( authmode == MBEDTLS_SSL_VERIFY_OPTIONAL )
rahul_dahiya	0:fb8047b156bb	4386	return( 0 );
rahul_dahiya	0:fb8047b156bb	4387	else
rahul_dahiya	0:fb8047b156bb	4388	return( MBEDTLS_ERR_SSL_NO_CLIENT_CERTIFICATE );
rahul_dahiya	0:fb8047b156bb	4389	}
rahul_dahiya	0:fb8047b156bb	4390	}
rahul_dahiya	0:fb8047b156bb	4391	#endif /* MBEDTLS_SSL_PROTO_SSL3 */
rahul_dahiya	0:fb8047b156bb	4392
rahul_dahiya	0:fb8047b156bb	4393	#if defined(MBEDTLS_SSL_PROTO_TLS1) \|\| defined(MBEDTLS_SSL_PROTO_TLS1_1) \|\| \
rahul_dahiya	0:fb8047b156bb	4394	defined(MBEDTLS_SSL_PROTO_TLS1_2)
rahul_dahiya	0:fb8047b156bb	4395	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER &&
rahul_dahiya	0:fb8047b156bb	4396	ssl->minor_ver != MBEDTLS_SSL_MINOR_VERSION_0 )
rahul_dahiya	0:fb8047b156bb	4397	{
rahul_dahiya	0:fb8047b156bb	4398	if( ssl->in_hslen == 3 + mbedtls_ssl_hs_hdr_len( ssl ) &&
rahul_dahiya	0:fb8047b156bb	4399	ssl->in_msgtype == MBEDTLS_SSL_MSG_HANDSHAKE &&
rahul_dahiya	0:fb8047b156bb	4400	ssl->in_msg[0] == MBEDTLS_SSL_HS_CERTIFICATE &&
rahul_dahiya	0:fb8047b156bb	4401	memcmp( ssl->in_msg + mbedtls_ssl_hs_hdr_len( ssl ), "\0\0\0", 3 ) == 0 )
rahul_dahiya	0:fb8047b156bb	4402	{
rahul_dahiya	0:fb8047b156bb	4403	MBEDTLS_SSL_DEBUG_MSG( 1, ( "TLSv1 client has no certificate" ) );
rahul_dahiya	0:fb8047b156bb	4404
rahul_dahiya	0:fb8047b156bb	4405	/* The client was asked for a certificate but didn't send
rahul_dahiya	0:fb8047b156bb	4406	one. The client should know what's going on, so we
rahul_dahiya	0:fb8047b156bb	4407	don't send an alert. */
rahul_dahiya	0:fb8047b156bb	4408	ssl->session_negotiate->verify_result = MBEDTLS_X509_BADCERT_MISSING;
rahul_dahiya	0:fb8047b156bb	4409	if( authmode == MBEDTLS_SSL_VERIFY_OPTIONAL )
rahul_dahiya	0:fb8047b156bb	4410	return( 0 );
rahul_dahiya	0:fb8047b156bb	4411	else
rahul_dahiya	0:fb8047b156bb	4412	return( MBEDTLS_ERR_SSL_NO_CLIENT_CERTIFICATE );
rahul_dahiya	0:fb8047b156bb	4413	}
rahul_dahiya	0:fb8047b156bb	4414	}
rahul_dahiya	0:fb8047b156bb	4415	#endif /* MBEDTLS_SSL_PROTO_TLS1 \|\| MBEDTLS_SSL_PROTO_TLS1_1 \|\| \
rahul_dahiya	0:fb8047b156bb	4416	MBEDTLS_SSL_PROTO_TLS1_2 */
rahul_dahiya	0:fb8047b156bb	4417	#endif /* MBEDTLS_SSL_SRV_C */
rahul_dahiya	0:fb8047b156bb	4418
rahul_dahiya	0:fb8047b156bb	4419	if( ssl->in_msgtype != MBEDTLS_SSL_MSG_HANDSHAKE )
rahul_dahiya	0:fb8047b156bb	4420	{
rahul_dahiya	0:fb8047b156bb	4421	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate message" ) );
rahul_dahiya	0:fb8047b156bb	4422	mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
rahul_dahiya	0:fb8047b156bb	4423	MBEDTLS_SSL_ALERT_MSG_UNEXPECTED_MESSAGE );
rahul_dahiya	0:fb8047b156bb	4424	return( MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE );
rahul_dahiya	0:fb8047b156bb	4425	}
rahul_dahiya	0:fb8047b156bb	4426
rahul_dahiya	0:fb8047b156bb	4427	if( ssl->in_msg[0] != MBEDTLS_SSL_HS_CERTIFICATE \|\|
rahul_dahiya	0:fb8047b156bb	4428	ssl->in_hslen < mbedtls_ssl_hs_hdr_len( ssl ) + 3 + 3 )
rahul_dahiya	0:fb8047b156bb	4429	{
rahul_dahiya	0:fb8047b156bb	4430	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate message" ) );
rahul_dahiya	0:fb8047b156bb	4431	mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
rahul_dahiya	0:fb8047b156bb	4432	MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
rahul_dahiya	0:fb8047b156bb	4433	return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE );
rahul_dahiya	0:fb8047b156bb	4434	}
rahul_dahiya	0:fb8047b156bb	4435
rahul_dahiya	0:fb8047b156bb	4436	i = mbedtls_ssl_hs_hdr_len( ssl );
rahul_dahiya	0:fb8047b156bb	4437
rahul_dahiya	0:fb8047b156bb	4438	/*
rahul_dahiya	0:fb8047b156bb	4439	* Same message structure as in mbedtls_ssl_write_certificate()
rahul_dahiya	0:fb8047b156bb	4440	*/
rahul_dahiya	0:fb8047b156bb	4441	n = ( ssl->in_msg[i+1] << 8 ) \| ssl->in_msg[i+2];
rahul_dahiya	0:fb8047b156bb	4442
rahul_dahiya	0:fb8047b156bb	4443	if( ssl->in_msg[i] != 0 \|\|
rahul_dahiya	0:fb8047b156bb	4444	ssl->in_hslen != n + 3 + mbedtls_ssl_hs_hdr_len( ssl ) )
rahul_dahiya	0:fb8047b156bb	4445	{
rahul_dahiya	0:fb8047b156bb	4446	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate message" ) );
rahul_dahiya	0:fb8047b156bb	4447	mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
rahul_dahiya	0:fb8047b156bb	4448	MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
rahul_dahiya	0:fb8047b156bb	4449	return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE );
rahul_dahiya	0:fb8047b156bb	4450	}
rahul_dahiya	0:fb8047b156bb	4451
rahul_dahiya	0:fb8047b156bb	4452	/* In case we tried to reuse a session but it failed */
rahul_dahiya	0:fb8047b156bb	4453	if( ssl->session_negotiate->peer_cert != NULL )
rahul_dahiya	0:fb8047b156bb	4454	{
rahul_dahiya	0:fb8047b156bb	4455	mbedtls_x509_crt_free( ssl->session_negotiate->peer_cert );
rahul_dahiya	0:fb8047b156bb	4456	mbedtls_free( ssl->session_negotiate->peer_cert );
rahul_dahiya	0:fb8047b156bb	4457	}
rahul_dahiya	0:fb8047b156bb	4458
rahul_dahiya	0:fb8047b156bb	4459	if( ( ssl->session_negotiate->peer_cert = mbedtls_calloc( 1,
rahul_dahiya	0:fb8047b156bb	4460	sizeof( mbedtls_x509_crt ) ) ) == NULL )
rahul_dahiya	0:fb8047b156bb	4461	{
rahul_dahiya	0:fb8047b156bb	4462	MBEDTLS_SSL_DEBUG_MSG( 1, ( "alloc(%d bytes) failed",
rahul_dahiya	0:fb8047b156bb	4463	sizeof( mbedtls_x509_crt ) ) );
rahul_dahiya	0:fb8047b156bb	4464	mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
rahul_dahiya	0:fb8047b156bb	4465	MBEDTLS_SSL_ALERT_MSG_INTERNAL_ERROR );
rahul_dahiya	0:fb8047b156bb	4466	return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
rahul_dahiya	0:fb8047b156bb	4467	}
rahul_dahiya	0:fb8047b156bb	4468
rahul_dahiya	0:fb8047b156bb	4469	mbedtls_x509_crt_init( ssl->session_negotiate->peer_cert );
rahul_dahiya	0:fb8047b156bb	4470
rahul_dahiya	0:fb8047b156bb	4471	i += 3;
rahul_dahiya	0:fb8047b156bb	4472
rahul_dahiya	0:fb8047b156bb	4473	while( i < ssl->in_hslen )
rahul_dahiya	0:fb8047b156bb	4474	{
rahul_dahiya	0:fb8047b156bb	4475	if( ssl->in_msg[i] != 0 )
rahul_dahiya	0:fb8047b156bb	4476	{
rahul_dahiya	0:fb8047b156bb	4477	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate message" ) );
rahul_dahiya	0:fb8047b156bb	4478	mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
rahul_dahiya	0:fb8047b156bb	4479	MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
rahul_dahiya	0:fb8047b156bb	4480	return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE );
rahul_dahiya	0:fb8047b156bb	4481	}
rahul_dahiya	0:fb8047b156bb	4482
rahul_dahiya	0:fb8047b156bb	4483	n = ( (unsigned int) ssl->in_msg[i + 1] << 8 )
rahul_dahiya	0:fb8047b156bb	4484	\| (unsigned int) ssl->in_msg[i + 2];
rahul_dahiya	0:fb8047b156bb	4485	i += 3;
rahul_dahiya	0:fb8047b156bb	4486
rahul_dahiya	0:fb8047b156bb	4487	if( n < 128 \|\| i + n > ssl->in_hslen )
rahul_dahiya	0:fb8047b156bb	4488	{
rahul_dahiya	0:fb8047b156bb	4489	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate message" ) );
rahul_dahiya	0:fb8047b156bb	4490	mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
rahul_dahiya	0:fb8047b156bb	4491	MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
rahul_dahiya	0:fb8047b156bb	4492	return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE );
rahul_dahiya	0:fb8047b156bb	4493	}
rahul_dahiya	0:fb8047b156bb	4494
rahul_dahiya	0:fb8047b156bb	4495	ret = mbedtls_x509_crt_parse_der( ssl->session_negotiate->peer_cert,
rahul_dahiya	0:fb8047b156bb	4496	ssl->in_msg + i, n );
rahul_dahiya	0:fb8047b156bb	4497	switch( ret )
rahul_dahiya	0:fb8047b156bb	4498	{
rahul_dahiya	0:fb8047b156bb	4499	case 0: /ok/
rahul_dahiya	0:fb8047b156bb	4500	case MBEDTLS_ERR_X509_UNKNOWN_SIG_ALG + MBEDTLS_ERR_OID_NOT_FOUND:
rahul_dahiya	0:fb8047b156bb	4501	/* Ignore certificate with an unknown algorithm: maybe a
rahul_dahiya	0:fb8047b156bb	4502	prior certificate was already trusted. */
rahul_dahiya	0:fb8047b156bb	4503	break;
rahul_dahiya	0:fb8047b156bb	4504
rahul_dahiya	0:fb8047b156bb	4505	case MBEDTLS_ERR_X509_ALLOC_FAILED:
rahul_dahiya	0:fb8047b156bb	4506	alert = MBEDTLS_SSL_ALERT_MSG_INTERNAL_ERROR;
rahul_dahiya	0:fb8047b156bb	4507	goto crt_parse_der_failed;
rahul_dahiya	0:fb8047b156bb	4508
rahul_dahiya	0:fb8047b156bb	4509	case MBEDTLS_ERR_X509_UNKNOWN_VERSION:
rahul_dahiya	0:fb8047b156bb	4510	alert = MBEDTLS_SSL_ALERT_MSG_UNSUPPORTED_CERT;
rahul_dahiya	0:fb8047b156bb	4511	goto crt_parse_der_failed;
rahul_dahiya	0:fb8047b156bb	4512
rahul_dahiya	0:fb8047b156bb	4513	default:
rahul_dahiya	0:fb8047b156bb	4514	alert = MBEDTLS_SSL_ALERT_MSG_BAD_CERT;
rahul_dahiya	0:fb8047b156bb	4515	crt_parse_der_failed:
rahul_dahiya	0:fb8047b156bb	4516	mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL, alert );
rahul_dahiya	0:fb8047b156bb	4517	MBEDTLS_SSL_DEBUG_RET( 1, " mbedtls_x509_crt_parse_der", ret );
rahul_dahiya	0:fb8047b156bb	4518	return( ret );
rahul_dahiya	0:fb8047b156bb	4519	}
rahul_dahiya	0:fb8047b156bb	4520
rahul_dahiya	0:fb8047b156bb	4521	i += n;
rahul_dahiya	0:fb8047b156bb	4522	}
rahul_dahiya	0:fb8047b156bb	4523
rahul_dahiya	0:fb8047b156bb	4524	MBEDTLS_SSL_DEBUG_CRT( 3, "peer certificate", ssl->session_negotiate->peer_cert );
rahul_dahiya	0:fb8047b156bb	4525
rahul_dahiya	0:fb8047b156bb	4526	/*
rahul_dahiya	0:fb8047b156bb	4527	* On client, make sure the server cert doesn't change during renego to
rahul_dahiya	0:fb8047b156bb	4528	* avoid "triple handshake" attack: https://secure-resumption.com/
rahul_dahiya	0:fb8047b156bb	4529	*/
rahul_dahiya	0:fb8047b156bb	4530	#if defined(MBEDTLS_SSL_RENEGOTIATION) && defined(MBEDTLS_SSL_CLI_C)
rahul_dahiya	0:fb8047b156bb	4531	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_CLIENT &&
rahul_dahiya	0:fb8047b156bb	4532	ssl->renego_status == MBEDTLS_SSL_RENEGOTIATION_IN_PROGRESS )
rahul_dahiya	0:fb8047b156bb	4533	{
rahul_dahiya	0:fb8047b156bb	4534	if( ssl->session->peer_cert == NULL )
rahul_dahiya	0:fb8047b156bb	4535	{
rahul_dahiya	0:fb8047b156bb	4536	MBEDTLS_SSL_DEBUG_MSG( 1, ( "new server cert during renegotiation" ) );
rahul_dahiya	0:fb8047b156bb	4537	mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
rahul_dahiya	0:fb8047b156bb	4538	MBEDTLS_SSL_ALERT_MSG_ACCESS_DENIED );
rahul_dahiya	0:fb8047b156bb	4539	return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE );
rahul_dahiya	0:fb8047b156bb	4540	}
rahul_dahiya	0:fb8047b156bb	4541
rahul_dahiya	0:fb8047b156bb	4542	if( ssl->session->peer_cert->raw.len !=
rahul_dahiya	0:fb8047b156bb	4543	ssl->session_negotiate->peer_cert->raw.len \|\|
rahul_dahiya	0:fb8047b156bb	4544	memcmp( ssl->session->peer_cert->raw.p,
rahul_dahiya	0:fb8047b156bb	4545	ssl->session_negotiate->peer_cert->raw.p,
rahul_dahiya	0:fb8047b156bb	4546	ssl->session->peer_cert->raw.len ) != 0 )
rahul_dahiya	0:fb8047b156bb	4547	{
rahul_dahiya	0:fb8047b156bb	4548	MBEDTLS_SSL_DEBUG_MSG( 1, ( "server cert changed during renegotiation" ) );
rahul_dahiya	0:fb8047b156bb	4549	mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
rahul_dahiya	0:fb8047b156bb	4550	MBEDTLS_SSL_ALERT_MSG_ACCESS_DENIED );
rahul_dahiya	0:fb8047b156bb	4551	return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE );
rahul_dahiya	0:fb8047b156bb	4552	}
rahul_dahiya	0:fb8047b156bb	4553	}
rahul_dahiya	0:fb8047b156bb	4554	#endif /* MBEDTLS_SSL_RENEGOTIATION && MBEDTLS_SSL_CLI_C */
rahul_dahiya	0:fb8047b156bb	4555
rahul_dahiya	0:fb8047b156bb	4556	if( authmode != MBEDTLS_SSL_VERIFY_NONE )
rahul_dahiya	0:fb8047b156bb	4557	{
rahul_dahiya	0:fb8047b156bb	4558	mbedtls_x509_crt *ca_chain;
rahul_dahiya	0:fb8047b156bb	4559	mbedtls_x509_crl *ca_crl;
rahul_dahiya	0:fb8047b156bb	4560
rahul_dahiya	0:fb8047b156bb	4561	#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
rahul_dahiya	0:fb8047b156bb	4562	if( ssl->handshake->sni_ca_chain != NULL )
rahul_dahiya	0:fb8047b156bb	4563	{
rahul_dahiya	0:fb8047b156bb	4564	ca_chain = ssl->handshake->sni_ca_chain;
rahul_dahiya	0:fb8047b156bb	4565	ca_crl = ssl->handshake->sni_ca_crl;
rahul_dahiya	0:fb8047b156bb	4566	}
rahul_dahiya	0:fb8047b156bb	4567	else
rahul_dahiya	0:fb8047b156bb	4568	#endif
rahul_dahiya	0:fb8047b156bb	4569	{
rahul_dahiya	0:fb8047b156bb	4570	ca_chain = ssl->conf->ca_chain;
rahul_dahiya	0:fb8047b156bb	4571	ca_crl = ssl->conf->ca_crl;
rahul_dahiya	0:fb8047b156bb	4572	}
rahul_dahiya	0:fb8047b156bb	4573
rahul_dahiya	0:fb8047b156bb	4574	/*
rahul_dahiya	0:fb8047b156bb	4575	* Main check: verify certificate
rahul_dahiya	0:fb8047b156bb	4576	*/
rahul_dahiya	0:fb8047b156bb	4577	ret = mbedtls_x509_crt_verify_with_profile(
rahul_dahiya	0:fb8047b156bb	4578	ssl->session_negotiate->peer_cert,
rahul_dahiya	0:fb8047b156bb	4579	ca_chain, ca_crl,
rahul_dahiya	0:fb8047b156bb	4580	ssl->conf->cert_profile,
rahul_dahiya	0:fb8047b156bb	4581	ssl->hostname,
rahul_dahiya	0:fb8047b156bb	4582	&ssl->session_negotiate->verify_result,
rahul_dahiya	0:fb8047b156bb	4583	ssl->conf->f_vrfy, ssl->conf->p_vrfy );
rahul_dahiya	0:fb8047b156bb	4584
rahul_dahiya	0:fb8047b156bb	4585	if( ret != 0 )
rahul_dahiya	0:fb8047b156bb	4586	{
rahul_dahiya	0:fb8047b156bb	4587	MBEDTLS_SSL_DEBUG_RET( 1, "x509_verify_cert", ret );
rahul_dahiya	0:fb8047b156bb	4588	}
rahul_dahiya	0:fb8047b156bb	4589
rahul_dahiya	0:fb8047b156bb	4590	/*
rahul_dahiya	0:fb8047b156bb	4591	* Secondary checks: always done, but change 'ret' only if it was 0
rahul_dahiya	0:fb8047b156bb	4592	*/
rahul_dahiya	0:fb8047b156bb	4593
rahul_dahiya	0:fb8047b156bb	4594	#if defined(MBEDTLS_ECP_C)
rahul_dahiya	0:fb8047b156bb	4595	{
rahul_dahiya	0:fb8047b156bb	4596	const mbedtls_pk_context *pk = &ssl->session_negotiate->peer_cert->pk;
rahul_dahiya	0:fb8047b156bb	4597
rahul_dahiya	0:fb8047b156bb	4598	/* If certificate uses an EC key, make sure the curve is OK */
rahul_dahiya	0:fb8047b156bb	4599	if( mbedtls_pk_can_do( pk, MBEDTLS_PK_ECKEY ) &&
rahul_dahiya	0:fb8047b156bb	4600	mbedtls_ssl_check_curve( ssl, mbedtls_pk_ec( *pk )->grp.id ) != 0 )
rahul_dahiya	0:fb8047b156bb	4601	{
rahul_dahiya	0:fb8047b156bb	4602	ssl->session_negotiate->verify_result \|= MBEDTLS_X509_BADCERT_BAD_KEY;
rahul_dahiya	0:fb8047b156bb	4603
rahul_dahiya	0:fb8047b156bb	4604	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate (EC key curve)" ) );
rahul_dahiya	0:fb8047b156bb	4605	if( ret == 0 )
rahul_dahiya	0:fb8047b156bb	4606	ret = MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE;
rahul_dahiya	0:fb8047b156bb	4607	}
rahul_dahiya	0:fb8047b156bb	4608	}
rahul_dahiya	0:fb8047b156bb	4609	#endif /* MBEDTLS_ECP_C */
rahul_dahiya	0:fb8047b156bb	4610
rahul_dahiya	0:fb8047b156bb	4611	if( mbedtls_ssl_check_cert_usage( ssl->session_negotiate->peer_cert,
rahul_dahiya	0:fb8047b156bb	4612	ciphersuite_info,
rahul_dahiya	0:fb8047b156bb	4613	! ssl->conf->endpoint,
rahul_dahiya	0:fb8047b156bb	4614	&ssl->session_negotiate->verify_result ) != 0 )
rahul_dahiya	0:fb8047b156bb	4615	{
rahul_dahiya	0:fb8047b156bb	4616	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate (usage extensions)" ) );
rahul_dahiya	0:fb8047b156bb	4617	if( ret == 0 )
rahul_dahiya	0:fb8047b156bb	4618	ret = MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE;
rahul_dahiya	0:fb8047b156bb	4619	}
rahul_dahiya	0:fb8047b156bb	4620
rahul_dahiya	0:fb8047b156bb	4621	/* mbedtls_x509_crt_verify_with_profile is supposed to report a
rahul_dahiya	0:fb8047b156bb	4622	* verification failure through MBEDTLS_ERR_X509_CERT_VERIFY_FAILED,
rahul_dahiya	0:fb8047b156bb	4623	* with details encoded in the verification flags. All other kinds
rahul_dahiya	0:fb8047b156bb	4624	* of error codes, including those from the user provided f_vrfy
rahul_dahiya	0:fb8047b156bb	4625	* functions, are treated as fatal and lead to a failure of
rahul_dahiya	0:fb8047b156bb	4626	* ssl_parse_certificate even if verification was optional. */
rahul_dahiya	0:fb8047b156bb	4627	if( authmode == MBEDTLS_SSL_VERIFY_OPTIONAL &&
rahul_dahiya	0:fb8047b156bb	4628	( ret == MBEDTLS_ERR_X509_CERT_VERIFY_FAILED \|\|
rahul_dahiya	0:fb8047b156bb	4629	ret == MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE ) )
rahul_dahiya	0:fb8047b156bb	4630	{
rahul_dahiya	0:fb8047b156bb	4631	ret = 0;
rahul_dahiya	0:fb8047b156bb	4632	}
rahul_dahiya	0:fb8047b156bb	4633
rahul_dahiya	0:fb8047b156bb	4634	if( ca_chain == NULL && authmode == MBEDTLS_SSL_VERIFY_REQUIRED )
rahul_dahiya	0:fb8047b156bb	4635	{
rahul_dahiya	0:fb8047b156bb	4636	MBEDTLS_SSL_DEBUG_MSG( 1, ( "got no CA chain" ) );
rahul_dahiya	0:fb8047b156bb	4637	ret = MBEDTLS_ERR_SSL_CA_CHAIN_REQUIRED;
rahul_dahiya	0:fb8047b156bb	4638	}
rahul_dahiya	0:fb8047b156bb	4639
rahul_dahiya	0:fb8047b156bb	4640	if( ret != 0 )
rahul_dahiya	0:fb8047b156bb	4641	{
rahul_dahiya	0:fb8047b156bb	4642	/* The certificate may have been rejected for several reasons.
rahul_dahiya	0:fb8047b156bb	4643	Pick one and send the corresponding alert. Which alert to send
rahul_dahiya	0:fb8047b156bb	4644	may be a subject of debate in some cases. */
rahul_dahiya	0:fb8047b156bb	4645	if( ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_OTHER )
rahul_dahiya	0:fb8047b156bb	4646	alert = MBEDTLS_SSL_ALERT_MSG_ACCESS_DENIED;
rahul_dahiya	0:fb8047b156bb	4647	else if( ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_CN_MISMATCH )
rahul_dahiya	0:fb8047b156bb	4648	alert = MBEDTLS_SSL_ALERT_MSG_BAD_CERT;
rahul_dahiya	0:fb8047b156bb	4649	else if( ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_KEY_USAGE )
rahul_dahiya	0:fb8047b156bb	4650	alert = MBEDTLS_SSL_ALERT_MSG_UNSUPPORTED_CERT;
rahul_dahiya	0:fb8047b156bb	4651	else if( ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_EXT_KEY_USAGE )
rahul_dahiya	0:fb8047b156bb	4652	alert = MBEDTLS_SSL_ALERT_MSG_UNSUPPORTED_CERT;
rahul_dahiya	0:fb8047b156bb	4653	else if( ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_NS_CERT_TYPE )
rahul_dahiya	0:fb8047b156bb	4654	alert = MBEDTLS_SSL_ALERT_MSG_UNSUPPORTED_CERT;
rahul_dahiya	0:fb8047b156bb	4655	else if( ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_BAD_PK )
rahul_dahiya	0:fb8047b156bb	4656	alert = MBEDTLS_SSL_ALERT_MSG_UNSUPPORTED_CERT;
rahul_dahiya	0:fb8047b156bb	4657	else if( ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_BAD_KEY )
rahul_dahiya	0:fb8047b156bb	4658	alert = MBEDTLS_SSL_ALERT_MSG_UNSUPPORTED_CERT;
rahul_dahiya	0:fb8047b156bb	4659	else if( ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_EXPIRED )
rahul_dahiya	0:fb8047b156bb	4660	alert = MBEDTLS_SSL_ALERT_MSG_CERT_EXPIRED;
rahul_dahiya	0:fb8047b156bb	4661	else if( ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_REVOKED )
rahul_dahiya	0:fb8047b156bb	4662	alert = MBEDTLS_SSL_ALERT_MSG_CERT_REVOKED;
rahul_dahiya	0:fb8047b156bb	4663	else if( ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_NOT_TRUSTED )
rahul_dahiya	0:fb8047b156bb	4664	alert = MBEDTLS_SSL_ALERT_MSG_UNKNOWN_CA;
rahul_dahiya	0:fb8047b156bb	4665	else
rahul_dahiya	0:fb8047b156bb	4666	alert = MBEDTLS_SSL_ALERT_MSG_CERT_UNKNOWN;
rahul_dahiya	0:fb8047b156bb	4667	mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
rahul_dahiya	0:fb8047b156bb	4668	alert );
rahul_dahiya	0:fb8047b156bb	4669	}
rahul_dahiya	0:fb8047b156bb	4670
rahul_dahiya	0:fb8047b156bb	4671	#if defined(MBEDTLS_DEBUG_C)
rahul_dahiya	0:fb8047b156bb	4672	if( ssl->session_negotiate->verify_result != 0 )
rahul_dahiya	0:fb8047b156bb	4673	{
rahul_dahiya	0:fb8047b156bb	4674	MBEDTLS_SSL_DEBUG_MSG( 3, ( "! Certificate verification flags %x",
rahul_dahiya	0:fb8047b156bb	4675	ssl->session_negotiate->verify_result ) );
rahul_dahiya	0:fb8047b156bb	4676	}
rahul_dahiya	0:fb8047b156bb	4677	else
rahul_dahiya	0:fb8047b156bb	4678	{
rahul_dahiya	0:fb8047b156bb	4679	MBEDTLS_SSL_DEBUG_MSG( 3, ( "Certificate verification flags clear" ) );
rahul_dahiya	0:fb8047b156bb	4680	}
rahul_dahiya	0:fb8047b156bb	4681	#endif /* MBEDTLS_DEBUG_C */
rahul_dahiya	0:fb8047b156bb	4682	}
rahul_dahiya	0:fb8047b156bb	4683
rahul_dahiya	0:fb8047b156bb	4684	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= parse certificate" ) );
rahul_dahiya	0:fb8047b156bb	4685
rahul_dahiya	0:fb8047b156bb	4686	return( ret );
rahul_dahiya	0:fb8047b156bb	4687	}
rahul_dahiya	0:fb8047b156bb	4688	#endif /* !MBEDTLS_KEY_EXCHANGE_RSA_ENABLED
rahul_dahiya	0:fb8047b156bb	4689	!MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED
rahul_dahiya	0:fb8047b156bb	4690	!MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED
rahul_dahiya	0:fb8047b156bb	4691	!MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED
rahul_dahiya	0:fb8047b156bb	4692	!MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED
rahul_dahiya	0:fb8047b156bb	4693	!MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED
rahul_dahiya	0:fb8047b156bb	4694	!MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED */
rahul_dahiya	0:fb8047b156bb	4695
rahul_dahiya	0:fb8047b156bb	4696	int mbedtls_ssl_write_change_cipher_spec( mbedtls_ssl_context *ssl )
rahul_dahiya	0:fb8047b156bb	4697	{
rahul_dahiya	0:fb8047b156bb	4698	int ret;
rahul_dahiya	0:fb8047b156bb	4699
rahul_dahiya	0:fb8047b156bb	4700	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write change cipher spec" ) );
rahul_dahiya	0:fb8047b156bb	4701
rahul_dahiya	0:fb8047b156bb	4702	ssl->out_msgtype = MBEDTLS_SSL_MSG_CHANGE_CIPHER_SPEC;
rahul_dahiya	0:fb8047b156bb	4703	ssl->out_msglen = 1;
rahul_dahiya	0:fb8047b156bb	4704	ssl->out_msg[0] = 1;
rahul_dahiya	0:fb8047b156bb	4705
rahul_dahiya	0:fb8047b156bb	4706	ssl->state++;
rahul_dahiya	0:fb8047b156bb	4707
rahul_dahiya	0:fb8047b156bb	4708	if( ( ret = mbedtls_ssl_write_record( ssl ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	4709	{
rahul_dahiya	0:fb8047b156bb	4710	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_write_record", ret );
rahul_dahiya	0:fb8047b156bb	4711	return( ret );
rahul_dahiya	0:fb8047b156bb	4712	}
rahul_dahiya	0:fb8047b156bb	4713
rahul_dahiya	0:fb8047b156bb	4714	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= write change cipher spec" ) );
rahul_dahiya	0:fb8047b156bb	4715
rahul_dahiya	0:fb8047b156bb	4716	return( 0 );
rahul_dahiya	0:fb8047b156bb	4717	}
rahul_dahiya	0:fb8047b156bb	4718
rahul_dahiya	0:fb8047b156bb	4719	int mbedtls_ssl_parse_change_cipher_spec( mbedtls_ssl_context *ssl )
rahul_dahiya	0:fb8047b156bb	4720	{
rahul_dahiya	0:fb8047b156bb	4721	int ret;
rahul_dahiya	0:fb8047b156bb	4722
rahul_dahiya	0:fb8047b156bb	4723	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> parse change cipher spec" ) );
rahul_dahiya	0:fb8047b156bb	4724
rahul_dahiya	0:fb8047b156bb	4725	if( ( ret = mbedtls_ssl_read_record( ssl ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	4726	{
rahul_dahiya	0:fb8047b156bb	4727	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_read_record", ret );
rahul_dahiya	0:fb8047b156bb	4728	return( ret );
rahul_dahiya	0:fb8047b156bb	4729	}
rahul_dahiya	0:fb8047b156bb	4730
rahul_dahiya	0:fb8047b156bb	4731	if( ssl->in_msgtype != MBEDTLS_SSL_MSG_CHANGE_CIPHER_SPEC )
rahul_dahiya	0:fb8047b156bb	4732	{
rahul_dahiya	0:fb8047b156bb	4733	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad change cipher spec message" ) );
rahul_dahiya	0:fb8047b156bb	4734	mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
rahul_dahiya	0:fb8047b156bb	4735	MBEDTLS_SSL_ALERT_MSG_UNEXPECTED_MESSAGE );
rahul_dahiya	0:fb8047b156bb	4736	return( MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE );
rahul_dahiya	0:fb8047b156bb	4737	}
rahul_dahiya	0:fb8047b156bb	4738
rahul_dahiya	0:fb8047b156bb	4739	if( ssl->in_msglen != 1 \|\| ssl->in_msg[0] != 1 )
rahul_dahiya	0:fb8047b156bb	4740	{
rahul_dahiya	0:fb8047b156bb	4741	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad change cipher spec message" ) );
rahul_dahiya	0:fb8047b156bb	4742	mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
rahul_dahiya	0:fb8047b156bb	4743	MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
rahul_dahiya	0:fb8047b156bb	4744	return( MBEDTLS_ERR_SSL_BAD_HS_CHANGE_CIPHER_SPEC );
rahul_dahiya	0:fb8047b156bb	4745	}
rahul_dahiya	0:fb8047b156bb	4746
rahul_dahiya	0:fb8047b156bb	4747	/*
rahul_dahiya	0:fb8047b156bb	4748	* Switch to our negotiated transform and session parameters for inbound
rahul_dahiya	0:fb8047b156bb	4749	* data.
rahul_dahiya	0:fb8047b156bb	4750	*/
rahul_dahiya	0:fb8047b156bb	4751	MBEDTLS_SSL_DEBUG_MSG( 3, ( "switching to new transform spec for inbound data" ) );
rahul_dahiya	0:fb8047b156bb	4752	ssl->transform_in = ssl->transform_negotiate;
rahul_dahiya	0:fb8047b156bb	4753	ssl->session_in = ssl->session_negotiate;
rahul_dahiya	0:fb8047b156bb	4754
rahul_dahiya	0:fb8047b156bb	4755	#if defined(MBEDTLS_SSL_PROTO_DTLS)
rahul_dahiya	0:fb8047b156bb	4756	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
rahul_dahiya	0:fb8047b156bb	4757	{
rahul_dahiya	0:fb8047b156bb	4758	#if defined(MBEDTLS_SSL_DTLS_ANTI_REPLAY)
rahul_dahiya	0:fb8047b156bb	4759	ssl_dtls_replay_reset( ssl );
rahul_dahiya	0:fb8047b156bb	4760	#endif
rahul_dahiya	0:fb8047b156bb	4761
rahul_dahiya	0:fb8047b156bb	4762	/* Increment epoch */
rahul_dahiya	0:fb8047b156bb	4763	if( ++ssl->in_epoch == 0 )
rahul_dahiya	0:fb8047b156bb	4764	{
rahul_dahiya	0:fb8047b156bb	4765	MBEDTLS_SSL_DEBUG_MSG( 1, ( "DTLS epoch would wrap" ) );
rahul_dahiya	0:fb8047b156bb	4766	/* This is highly unlikely to happen for legitimate reasons, so
rahul_dahiya	0:fb8047b156bb	4767	treat it as an attack and don't send an alert. */
rahul_dahiya	0:fb8047b156bb	4768	return( MBEDTLS_ERR_SSL_COUNTER_WRAPPING );
rahul_dahiya	0:fb8047b156bb	4769	}
rahul_dahiya	0:fb8047b156bb	4770	}
rahul_dahiya	0:fb8047b156bb	4771	else
rahul_dahiya	0:fb8047b156bb	4772	#endif /* MBEDTLS_SSL_PROTO_DTLS */
rahul_dahiya	0:fb8047b156bb	4773	memset( ssl->in_ctr, 0, 8 );
rahul_dahiya	0:fb8047b156bb	4774
rahul_dahiya	0:fb8047b156bb	4775	/*
rahul_dahiya	0:fb8047b156bb	4776	* Set the in_msg pointer to the correct location based on IV length
rahul_dahiya	0:fb8047b156bb	4777	*/
rahul_dahiya	0:fb8047b156bb	4778	if( ssl->minor_ver >= MBEDTLS_SSL_MINOR_VERSION_2 )
rahul_dahiya	0:fb8047b156bb	4779	{
rahul_dahiya	0:fb8047b156bb	4780	ssl->in_msg = ssl->in_iv + ssl->transform_negotiate->ivlen -
rahul_dahiya	0:fb8047b156bb	4781	ssl->transform_negotiate->fixed_ivlen;
rahul_dahiya	0:fb8047b156bb	4782	}
rahul_dahiya	0:fb8047b156bb	4783	else
rahul_dahiya	0:fb8047b156bb	4784	ssl->in_msg = ssl->in_iv;
rahul_dahiya	0:fb8047b156bb	4785
rahul_dahiya	0:fb8047b156bb	4786	#if defined(MBEDTLS_SSL_HW_RECORD_ACCEL)
rahul_dahiya	0:fb8047b156bb	4787	if( mbedtls_ssl_hw_record_activate != NULL )
rahul_dahiya	0:fb8047b156bb	4788	{
rahul_dahiya	0:fb8047b156bb	4789	if( ( ret = mbedtls_ssl_hw_record_activate( ssl, MBEDTLS_SSL_CHANNEL_INBOUND ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	4790	{
rahul_dahiya	0:fb8047b156bb	4791	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_hw_record_activate", ret );
rahul_dahiya	0:fb8047b156bb	4792	mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
rahul_dahiya	0:fb8047b156bb	4793	MBEDTLS_SSL_ALERT_MSG_INTERNAL_ERROR );
rahul_dahiya	0:fb8047b156bb	4794	return( MBEDTLS_ERR_SSL_HW_ACCEL_FAILED );
rahul_dahiya	0:fb8047b156bb	4795	}
rahul_dahiya	0:fb8047b156bb	4796	}
rahul_dahiya	0:fb8047b156bb	4797	#endif
rahul_dahiya	0:fb8047b156bb	4798
rahul_dahiya	0:fb8047b156bb	4799	ssl->state++;
rahul_dahiya	0:fb8047b156bb	4800
rahul_dahiya	0:fb8047b156bb	4801	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= parse change cipher spec" ) );
rahul_dahiya	0:fb8047b156bb	4802
rahul_dahiya	0:fb8047b156bb	4803	return( 0 );
rahul_dahiya	0:fb8047b156bb	4804	}
rahul_dahiya	0:fb8047b156bb	4805
rahul_dahiya	0:fb8047b156bb	4806	void mbedtls_ssl_optimize_checksum( mbedtls_ssl_context *ssl,
rahul_dahiya	0:fb8047b156bb	4807	const mbedtls_ssl_ciphersuite_t *ciphersuite_info )
rahul_dahiya	0:fb8047b156bb	4808	{
rahul_dahiya	0:fb8047b156bb	4809	((void) ciphersuite_info);
rahul_dahiya	0:fb8047b156bb	4810
rahul_dahiya	0:fb8047b156bb	4811	#if defined(MBEDTLS_SSL_PROTO_SSL3) \|\| defined(MBEDTLS_SSL_PROTO_TLS1) \|\| \
rahul_dahiya	0:fb8047b156bb	4812	defined(MBEDTLS_SSL_PROTO_TLS1_1)
rahul_dahiya	0:fb8047b156bb	4813	if( ssl->minor_ver < MBEDTLS_SSL_MINOR_VERSION_3 )
rahul_dahiya	0:fb8047b156bb	4814	ssl->handshake->update_checksum = ssl_update_checksum_md5sha1;
rahul_dahiya	0:fb8047b156bb	4815	else
rahul_dahiya	0:fb8047b156bb	4816	#endif
rahul_dahiya	0:fb8047b156bb	4817	#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
rahul_dahiya	0:fb8047b156bb	4818	#if defined(MBEDTLS_SHA512_C)
rahul_dahiya	0:fb8047b156bb	4819	if( ciphersuite_info->mac == MBEDTLS_MD_SHA384 )
rahul_dahiya	0:fb8047b156bb	4820	ssl->handshake->update_checksum = ssl_update_checksum_sha384;
rahul_dahiya	0:fb8047b156bb	4821	else
rahul_dahiya	0:fb8047b156bb	4822	#endif
rahul_dahiya	0:fb8047b156bb	4823	#if defined(MBEDTLS_SHA256_C)
rahul_dahiya	0:fb8047b156bb	4824	if( ciphersuite_info->mac != MBEDTLS_MD_SHA384 )
rahul_dahiya	0:fb8047b156bb	4825	ssl->handshake->update_checksum = ssl_update_checksum_sha256;
rahul_dahiya	0:fb8047b156bb	4826	else
rahul_dahiya	0:fb8047b156bb	4827	#endif
rahul_dahiya	0:fb8047b156bb	4828	#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
rahul_dahiya	0:fb8047b156bb	4829	{
rahul_dahiya	0:fb8047b156bb	4830	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
rahul_dahiya	0:fb8047b156bb	4831	return;
rahul_dahiya	0:fb8047b156bb	4832	}
rahul_dahiya	0:fb8047b156bb	4833	}
rahul_dahiya	0:fb8047b156bb	4834
rahul_dahiya	0:fb8047b156bb	4835	void mbedtls_ssl_reset_checksum( mbedtls_ssl_context *ssl )
rahul_dahiya	0:fb8047b156bb	4836	{
rahul_dahiya	0:fb8047b156bb	4837	#if defined(MBEDTLS_SSL_PROTO_SSL3) \|\| defined(MBEDTLS_SSL_PROTO_TLS1) \|\| \
rahul_dahiya	0:fb8047b156bb	4838	defined(MBEDTLS_SSL_PROTO_TLS1_1)
rahul_dahiya	0:fb8047b156bb	4839	mbedtls_md5_starts( &ssl->handshake->fin_md5 );
rahul_dahiya	0:fb8047b156bb	4840	mbedtls_sha1_starts( &ssl->handshake->fin_sha1 );
rahul_dahiya	0:fb8047b156bb	4841	#endif
rahul_dahiya	0:fb8047b156bb	4842	#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
rahul_dahiya	0:fb8047b156bb	4843	#if defined(MBEDTLS_SHA256_C)
rahul_dahiya	0:fb8047b156bb	4844	mbedtls_sha256_starts( &ssl->handshake->fin_sha256, 0 );
rahul_dahiya	0:fb8047b156bb	4845	#endif
rahul_dahiya	0:fb8047b156bb	4846	#if defined(MBEDTLS_SHA512_C)
rahul_dahiya	0:fb8047b156bb	4847	mbedtls_sha512_starts( &ssl->handshake->fin_sha512, 1 );
rahul_dahiya	0:fb8047b156bb	4848	#endif
rahul_dahiya	0:fb8047b156bb	4849	#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
rahul_dahiya	0:fb8047b156bb	4850	}
rahul_dahiya	0:fb8047b156bb	4851
rahul_dahiya	0:fb8047b156bb	4852	static void ssl_update_checksum_start( mbedtls_ssl_context *ssl,
rahul_dahiya	0:fb8047b156bb	4853	const unsigned char *buf, size_t len )
rahul_dahiya	0:fb8047b156bb	4854	{
rahul_dahiya	0:fb8047b156bb	4855	#if defined(MBEDTLS_SSL_PROTO_SSL3) \|\| defined(MBEDTLS_SSL_PROTO_TLS1) \|\| \
rahul_dahiya	0:fb8047b156bb	4856	defined(MBEDTLS_SSL_PROTO_TLS1_1)
rahul_dahiya	0:fb8047b156bb	4857	mbedtls_md5_update( &ssl->handshake->fin_md5 , buf, len );
rahul_dahiya	0:fb8047b156bb	4858	mbedtls_sha1_update( &ssl->handshake->fin_sha1, buf, len );
rahul_dahiya	0:fb8047b156bb	4859	#endif
rahul_dahiya	0:fb8047b156bb	4860	#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
rahul_dahiya	0:fb8047b156bb	4861	#if defined(MBEDTLS_SHA256_C)
rahul_dahiya	0:fb8047b156bb	4862	mbedtls_sha256_update( &ssl->handshake->fin_sha256, buf, len );
rahul_dahiya	0:fb8047b156bb	4863	#endif
rahul_dahiya	0:fb8047b156bb	4864	#if defined(MBEDTLS_SHA512_C)
rahul_dahiya	0:fb8047b156bb	4865	mbedtls_sha512_update( &ssl->handshake->fin_sha512, buf, len );
rahul_dahiya	0:fb8047b156bb	4866	#endif
rahul_dahiya	0:fb8047b156bb	4867	#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
rahul_dahiya	0:fb8047b156bb	4868	}
rahul_dahiya	0:fb8047b156bb	4869
rahul_dahiya	0:fb8047b156bb	4870	#if defined(MBEDTLS_SSL_PROTO_SSL3) \|\| defined(MBEDTLS_SSL_PROTO_TLS1) \|\| \
rahul_dahiya	0:fb8047b156bb	4871	defined(MBEDTLS_SSL_PROTO_TLS1_1)
rahul_dahiya	0:fb8047b156bb	4872	static void ssl_update_checksum_md5sha1( mbedtls_ssl_context *ssl,
rahul_dahiya	0:fb8047b156bb	4873	const unsigned char *buf, size_t len )
rahul_dahiya	0:fb8047b156bb	4874	{
rahul_dahiya	0:fb8047b156bb	4875	mbedtls_md5_update( &ssl->handshake->fin_md5 , buf, len );
rahul_dahiya	0:fb8047b156bb	4876	mbedtls_sha1_update( &ssl->handshake->fin_sha1, buf, len );
rahul_dahiya	0:fb8047b156bb	4877	}
rahul_dahiya	0:fb8047b156bb	4878	#endif
rahul_dahiya	0:fb8047b156bb	4879
rahul_dahiya	0:fb8047b156bb	4880	#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
rahul_dahiya	0:fb8047b156bb	4881	#if defined(MBEDTLS_SHA256_C)
rahul_dahiya	0:fb8047b156bb	4882	static void ssl_update_checksum_sha256( mbedtls_ssl_context *ssl,
rahul_dahiya	0:fb8047b156bb	4883	const unsigned char *buf, size_t len )
rahul_dahiya	0:fb8047b156bb	4884	{
rahul_dahiya	0:fb8047b156bb	4885	mbedtls_sha256_update( &ssl->handshake->fin_sha256, buf, len );
rahul_dahiya	0:fb8047b156bb	4886	}
rahul_dahiya	0:fb8047b156bb	4887	#endif
rahul_dahiya	0:fb8047b156bb	4888
rahul_dahiya	0:fb8047b156bb	4889	#if defined(MBEDTLS_SHA512_C)
rahul_dahiya	0:fb8047b156bb	4890	static void ssl_update_checksum_sha384( mbedtls_ssl_context *ssl,
rahul_dahiya	0:fb8047b156bb	4891	const unsigned char *buf, size_t len )
rahul_dahiya	0:fb8047b156bb	4892	{
rahul_dahiya	0:fb8047b156bb	4893	mbedtls_sha512_update( &ssl->handshake->fin_sha512, buf, len );
rahul_dahiya	0:fb8047b156bb	4894	}
rahul_dahiya	0:fb8047b156bb	4895	#endif
rahul_dahiya	0:fb8047b156bb	4896	#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
rahul_dahiya	0:fb8047b156bb	4897
rahul_dahiya	0:fb8047b156bb	4898	#if defined(MBEDTLS_SSL_PROTO_SSL3)
rahul_dahiya	0:fb8047b156bb	4899	static void ssl_calc_finished_ssl(
rahul_dahiya	0:fb8047b156bb	4900	mbedtls_ssl_context ssl, unsigned char buf, int from )
rahul_dahiya	0:fb8047b156bb	4901	{
rahul_dahiya	0:fb8047b156bb	4902	const char *sender;
rahul_dahiya	0:fb8047b156bb	4903	mbedtls_md5_context md5;
rahul_dahiya	0:fb8047b156bb	4904	mbedtls_sha1_context sha1;
rahul_dahiya	0:fb8047b156bb	4905
rahul_dahiya	0:fb8047b156bb	4906	unsigned char padbuf[48];
rahul_dahiya	0:fb8047b156bb	4907	unsigned char md5sum[16];
rahul_dahiya	0:fb8047b156bb	4908	unsigned char sha1sum[20];
rahul_dahiya	0:fb8047b156bb	4909
rahul_dahiya	0:fb8047b156bb	4910	mbedtls_ssl_session *session = ssl->session_negotiate;
rahul_dahiya	0:fb8047b156bb	4911	if( !session )
rahul_dahiya	0:fb8047b156bb	4912	session = ssl->session;
rahul_dahiya	0:fb8047b156bb	4913
rahul_dahiya	0:fb8047b156bb	4914	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> calc finished ssl" ) );
rahul_dahiya	0:fb8047b156bb	4915
rahul_dahiya	0:fb8047b156bb	4916	mbedtls_md5_init( &md5 );
rahul_dahiya	0:fb8047b156bb	4917	mbedtls_sha1_init( &sha1 );
rahul_dahiya	0:fb8047b156bb	4918
rahul_dahiya	0:fb8047b156bb	4919	mbedtls_md5_clone( &md5, &ssl->handshake->fin_md5 );
rahul_dahiya	0:fb8047b156bb	4920	mbedtls_sha1_clone( &sha1, &ssl->handshake->fin_sha1 );
rahul_dahiya	0:fb8047b156bb	4921
rahul_dahiya	0:fb8047b156bb	4922	/*
rahul_dahiya	0:fb8047b156bb	4923	* SSLv3:
rahul_dahiya	0:fb8047b156bb	4924	* hash =
rahul_dahiya	0:fb8047b156bb	4925	* MD5( master + pad2 +
rahul_dahiya	0:fb8047b156bb	4926	* MD5( handshake + sender + master + pad1 ) )
rahul_dahiya	0:fb8047b156bb	4927	* + SHA1( master + pad2 +
rahul_dahiya	0:fb8047b156bb	4928	* SHA1( handshake + sender + master + pad1 ) )
rahul_dahiya	0:fb8047b156bb	4929	*/
rahul_dahiya	0:fb8047b156bb	4930
rahul_dahiya	0:fb8047b156bb	4931	#if !defined(MBEDTLS_MD5_ALT)
rahul_dahiya	0:fb8047b156bb	4932	MBEDTLS_SSL_DEBUG_BUF( 4, "finished md5 state", (unsigned char *)
rahul_dahiya	0:fb8047b156bb	4933	md5.state, sizeof( md5.state ) );
rahul_dahiya	0:fb8047b156bb	4934	#endif
rahul_dahiya	0:fb8047b156bb	4935
rahul_dahiya	0:fb8047b156bb	4936	#if !defined(MBEDTLS_SHA1_ALT)
rahul_dahiya	0:fb8047b156bb	4937	MBEDTLS_SSL_DEBUG_BUF( 4, "finished sha1 state", (unsigned char *)
rahul_dahiya	0:fb8047b156bb	4938	sha1.state, sizeof( sha1.state ) );
rahul_dahiya	0:fb8047b156bb	4939	#endif
rahul_dahiya	0:fb8047b156bb	4940
rahul_dahiya	0:fb8047b156bb	4941	sender = ( from == MBEDTLS_SSL_IS_CLIENT ) ? "CLNT"
rahul_dahiya	0:fb8047b156bb	4942	: "SRVR";
rahul_dahiya	0:fb8047b156bb	4943
rahul_dahiya	0:fb8047b156bb	4944	memset( padbuf, 0x36, 48 );
rahul_dahiya	0:fb8047b156bb	4945
rahul_dahiya	0:fb8047b156bb	4946	mbedtls_md5_update( &md5, (const unsigned char *) sender, 4 );
rahul_dahiya	0:fb8047b156bb	4947	mbedtls_md5_update( &md5, session->master, 48 );
rahul_dahiya	0:fb8047b156bb	4948	mbedtls_md5_update( &md5, padbuf, 48 );
rahul_dahiya	0:fb8047b156bb	4949	mbedtls_md5_finish( &md5, md5sum );
rahul_dahiya	0:fb8047b156bb	4950
rahul_dahiya	0:fb8047b156bb	4951	mbedtls_sha1_update( &sha1, (const unsigned char *) sender, 4 );
rahul_dahiya	0:fb8047b156bb	4952	mbedtls_sha1_update( &sha1, session->master, 48 );
rahul_dahiya	0:fb8047b156bb	4953	mbedtls_sha1_update( &sha1, padbuf, 40 );
rahul_dahiya	0:fb8047b156bb	4954	mbedtls_sha1_finish( &sha1, sha1sum );
rahul_dahiya	0:fb8047b156bb	4955
rahul_dahiya	0:fb8047b156bb	4956	memset( padbuf, 0x5C, 48 );
rahul_dahiya	0:fb8047b156bb	4957
rahul_dahiya	0:fb8047b156bb	4958	mbedtls_md5_starts( &md5 );
rahul_dahiya	0:fb8047b156bb	4959	mbedtls_md5_update( &md5, session->master, 48 );
rahul_dahiya	0:fb8047b156bb	4960	mbedtls_md5_update( &md5, padbuf, 48 );
rahul_dahiya	0:fb8047b156bb	4961	mbedtls_md5_update( &md5, md5sum, 16 );
rahul_dahiya	0:fb8047b156bb	4962	mbedtls_md5_finish( &md5, buf );
rahul_dahiya	0:fb8047b156bb	4963
rahul_dahiya	0:fb8047b156bb	4964	mbedtls_sha1_starts( &sha1 );
rahul_dahiya	0:fb8047b156bb	4965	mbedtls_sha1_update( &sha1, session->master, 48 );
rahul_dahiya	0:fb8047b156bb	4966	mbedtls_sha1_update( &sha1, padbuf , 40 );
rahul_dahiya	0:fb8047b156bb	4967	mbedtls_sha1_update( &sha1, sha1sum, 20 );
rahul_dahiya	0:fb8047b156bb	4968	mbedtls_sha1_finish( &sha1, buf + 16 );
rahul_dahiya	0:fb8047b156bb	4969
rahul_dahiya	0:fb8047b156bb	4970	MBEDTLS_SSL_DEBUG_BUF( 3, "calc finished result", buf, 36 );
rahul_dahiya	0:fb8047b156bb	4971
rahul_dahiya	0:fb8047b156bb	4972	mbedtls_md5_free( &md5 );
rahul_dahiya	0:fb8047b156bb	4973	mbedtls_sha1_free( &sha1 );
rahul_dahiya	0:fb8047b156bb	4974
rahul_dahiya	0:fb8047b156bb	4975	mbedtls_zeroize( padbuf, sizeof( padbuf ) );
rahul_dahiya	0:fb8047b156bb	4976	mbedtls_zeroize( md5sum, sizeof( md5sum ) );
rahul_dahiya	0:fb8047b156bb	4977	mbedtls_zeroize( sha1sum, sizeof( sha1sum ) );
rahul_dahiya	0:fb8047b156bb	4978
rahul_dahiya	0:fb8047b156bb	4979	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= calc finished" ) );
rahul_dahiya	0:fb8047b156bb	4980	}
rahul_dahiya	0:fb8047b156bb	4981	#endif /* MBEDTLS_SSL_PROTO_SSL3 */
rahul_dahiya	0:fb8047b156bb	4982
rahul_dahiya	0:fb8047b156bb	4983	#if defined(MBEDTLS_SSL_PROTO_TLS1) \|\| defined(MBEDTLS_SSL_PROTO_TLS1_1)
rahul_dahiya	0:fb8047b156bb	4984	static void ssl_calc_finished_tls(
rahul_dahiya	0:fb8047b156bb	4985	mbedtls_ssl_context ssl, unsigned char buf, int from )
rahul_dahiya	0:fb8047b156bb	4986	{
rahul_dahiya	0:fb8047b156bb	4987	int len = 12;
rahul_dahiya	0:fb8047b156bb	4988	const char *sender;
rahul_dahiya	0:fb8047b156bb	4989	mbedtls_md5_context md5;
rahul_dahiya	0:fb8047b156bb	4990	mbedtls_sha1_context sha1;
rahul_dahiya	0:fb8047b156bb	4991	unsigned char padbuf[36];
rahul_dahiya	0:fb8047b156bb	4992
rahul_dahiya	0:fb8047b156bb	4993	mbedtls_ssl_session *session = ssl->session_negotiate;
rahul_dahiya	0:fb8047b156bb	4994	if( !session )
rahul_dahiya	0:fb8047b156bb	4995	session = ssl->session;
rahul_dahiya	0:fb8047b156bb	4996
rahul_dahiya	0:fb8047b156bb	4997	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> calc finished tls" ) );
rahul_dahiya	0:fb8047b156bb	4998
rahul_dahiya	0:fb8047b156bb	4999	mbedtls_md5_init( &md5 );
rahul_dahiya	0:fb8047b156bb	5000	mbedtls_sha1_init( &sha1 );
rahul_dahiya	0:fb8047b156bb	5001
rahul_dahiya	0:fb8047b156bb	5002	mbedtls_md5_clone( &md5, &ssl->handshake->fin_md5 );
rahul_dahiya	0:fb8047b156bb	5003	mbedtls_sha1_clone( &sha1, &ssl->handshake->fin_sha1 );
rahul_dahiya	0:fb8047b156bb	5004
rahul_dahiya	0:fb8047b156bb	5005	/*
rahul_dahiya	0:fb8047b156bb	5006	* TLSv1:
rahul_dahiya	0:fb8047b156bb	5007	* hash = PRF( master, finished_label,
rahul_dahiya	0:fb8047b156bb	5008	* MD5( handshake ) + SHA1( handshake ) )[0..11]
rahul_dahiya	0:fb8047b156bb	5009	*/
rahul_dahiya	0:fb8047b156bb	5010
rahul_dahiya	0:fb8047b156bb	5011	#if !defined(MBEDTLS_MD5_ALT)
rahul_dahiya	0:fb8047b156bb	5012	MBEDTLS_SSL_DEBUG_BUF( 4, "finished md5 state", (unsigned char *)
rahul_dahiya	0:fb8047b156bb	5013	md5.state, sizeof( md5.state ) );
rahul_dahiya	0:fb8047b156bb	5014	#endif
rahul_dahiya	0:fb8047b156bb	5015
rahul_dahiya	0:fb8047b156bb	5016	#if !defined(MBEDTLS_SHA1_ALT)
rahul_dahiya	0:fb8047b156bb	5017	MBEDTLS_SSL_DEBUG_BUF( 4, "finished sha1 state", (unsigned char *)
rahul_dahiya	0:fb8047b156bb	5018	sha1.state, sizeof( sha1.state ) );
rahul_dahiya	0:fb8047b156bb	5019	#endif
rahul_dahiya	0:fb8047b156bb	5020
rahul_dahiya	0:fb8047b156bb	5021	sender = ( from == MBEDTLS_SSL_IS_CLIENT )
rahul_dahiya	0:fb8047b156bb	5022	? "client finished"
rahul_dahiya	0:fb8047b156bb	5023	: "server finished";
rahul_dahiya	0:fb8047b156bb	5024
rahul_dahiya	0:fb8047b156bb	5025	mbedtls_md5_finish( &md5, padbuf );
rahul_dahiya	0:fb8047b156bb	5026	mbedtls_sha1_finish( &sha1, padbuf + 16 );
rahul_dahiya	0:fb8047b156bb	5027
rahul_dahiya	0:fb8047b156bb	5028	ssl->handshake->tls_prf( session->master, 48, sender,
rahul_dahiya	0:fb8047b156bb	5029	padbuf, 36, buf, len );
rahul_dahiya	0:fb8047b156bb	5030
rahul_dahiya	0:fb8047b156bb	5031	MBEDTLS_SSL_DEBUG_BUF( 3, "calc finished result", buf, len );
rahul_dahiya	0:fb8047b156bb	5032
rahul_dahiya	0:fb8047b156bb	5033	mbedtls_md5_free( &md5 );
rahul_dahiya	0:fb8047b156bb	5034	mbedtls_sha1_free( &sha1 );
rahul_dahiya	0:fb8047b156bb	5035
rahul_dahiya	0:fb8047b156bb	5036	mbedtls_zeroize( padbuf, sizeof( padbuf ) );
rahul_dahiya	0:fb8047b156bb	5037
rahul_dahiya	0:fb8047b156bb	5038	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= calc finished" ) );
rahul_dahiya	0:fb8047b156bb	5039	}
rahul_dahiya	0:fb8047b156bb	5040	#endif /* MBEDTLS_SSL_PROTO_TLS1 \|\| MBEDTLS_SSL_PROTO_TLS1_1 */
rahul_dahiya	0:fb8047b156bb	5041
rahul_dahiya	0:fb8047b156bb	5042	#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
rahul_dahiya	0:fb8047b156bb	5043	#if defined(MBEDTLS_SHA256_C)
rahul_dahiya	0:fb8047b156bb	5044	static void ssl_calc_finished_tls_sha256(
rahul_dahiya	0:fb8047b156bb	5045	mbedtls_ssl_context ssl, unsigned char buf, int from )
rahul_dahiya	0:fb8047b156bb	5046	{
rahul_dahiya	0:fb8047b156bb	5047	int len = 12;
rahul_dahiya	0:fb8047b156bb	5048	const char *sender;
rahul_dahiya	0:fb8047b156bb	5049	mbedtls_sha256_context sha256;
rahul_dahiya	0:fb8047b156bb	5050	unsigned char padbuf[32];
rahul_dahiya	0:fb8047b156bb	5051
rahul_dahiya	0:fb8047b156bb	5052	mbedtls_ssl_session *session = ssl->session_negotiate;
rahul_dahiya	0:fb8047b156bb	5053	if( !session )
rahul_dahiya	0:fb8047b156bb	5054	session = ssl->session;
rahul_dahiya	0:fb8047b156bb	5055
rahul_dahiya	0:fb8047b156bb	5056	mbedtls_sha256_init( &sha256 );
rahul_dahiya	0:fb8047b156bb	5057
rahul_dahiya	0:fb8047b156bb	5058	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> calc finished tls sha256" ) );
rahul_dahiya	0:fb8047b156bb	5059
rahul_dahiya	0:fb8047b156bb	5060	mbedtls_sha256_clone( &sha256, &ssl->handshake->fin_sha256 );
rahul_dahiya	0:fb8047b156bb	5061
rahul_dahiya	0:fb8047b156bb	5062	/*
rahul_dahiya	0:fb8047b156bb	5063	* TLSv1.2:
rahul_dahiya	0:fb8047b156bb	5064	* hash = PRF( master, finished_label,
rahul_dahiya	0:fb8047b156bb	5065	* Hash( handshake ) )[0.11]
rahul_dahiya	0:fb8047b156bb	5066	*/
rahul_dahiya	0:fb8047b156bb	5067
rahul_dahiya	0:fb8047b156bb	5068	#if !defined(MBEDTLS_SHA256_ALT)
rahul_dahiya	0:fb8047b156bb	5069	MBEDTLS_SSL_DEBUG_BUF( 4, "finished sha2 state", (unsigned char *)
rahul_dahiya	0:fb8047b156bb	5070	sha256.state, sizeof( sha256.state ) );
rahul_dahiya	0:fb8047b156bb	5071	#endif
rahul_dahiya	0:fb8047b156bb	5072
rahul_dahiya	0:fb8047b156bb	5073	sender = ( from == MBEDTLS_SSL_IS_CLIENT )
rahul_dahiya	0:fb8047b156bb	5074	? "client finished"
rahul_dahiya	0:fb8047b156bb	5075	: "server finished";
rahul_dahiya	0:fb8047b156bb	5076
rahul_dahiya	0:fb8047b156bb	5077	mbedtls_sha256_finish( &sha256, padbuf );
rahul_dahiya	0:fb8047b156bb	5078
rahul_dahiya	0:fb8047b156bb	5079	ssl->handshake->tls_prf( session->master, 48, sender,
rahul_dahiya	0:fb8047b156bb	5080	padbuf, 32, buf, len );
rahul_dahiya	0:fb8047b156bb	5081
rahul_dahiya	0:fb8047b156bb	5082	MBEDTLS_SSL_DEBUG_BUF( 3, "calc finished result", buf, len );
rahul_dahiya	0:fb8047b156bb	5083
rahul_dahiya	0:fb8047b156bb	5084	mbedtls_sha256_free( &sha256 );
rahul_dahiya	0:fb8047b156bb	5085
rahul_dahiya	0:fb8047b156bb	5086	mbedtls_zeroize( padbuf, sizeof( padbuf ) );
rahul_dahiya	0:fb8047b156bb	5087
rahul_dahiya	0:fb8047b156bb	5088	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= calc finished" ) );
rahul_dahiya	0:fb8047b156bb	5089	}
rahul_dahiya	0:fb8047b156bb	5090	#endif /* MBEDTLS_SHA256_C */
rahul_dahiya	0:fb8047b156bb	5091
rahul_dahiya	0:fb8047b156bb	5092	#if defined(MBEDTLS_SHA512_C)
rahul_dahiya	0:fb8047b156bb	5093	static void ssl_calc_finished_tls_sha384(
rahul_dahiya	0:fb8047b156bb	5094	mbedtls_ssl_context ssl, unsigned char buf, int from )
rahul_dahiya	0:fb8047b156bb	5095	{
rahul_dahiya	0:fb8047b156bb	5096	int len = 12;
rahul_dahiya	0:fb8047b156bb	5097	const char *sender;
rahul_dahiya	0:fb8047b156bb	5098	mbedtls_sha512_context sha512;
rahul_dahiya	0:fb8047b156bb	5099	unsigned char padbuf[48];
rahul_dahiya	0:fb8047b156bb	5100
rahul_dahiya	0:fb8047b156bb	5101	mbedtls_ssl_session *session = ssl->session_negotiate;
rahul_dahiya	0:fb8047b156bb	5102	if( !session )
rahul_dahiya	0:fb8047b156bb	5103	session = ssl->session;
rahul_dahiya	0:fb8047b156bb	5104
rahul_dahiya	0:fb8047b156bb	5105	mbedtls_sha512_init( &sha512 );
rahul_dahiya	0:fb8047b156bb	5106
rahul_dahiya	0:fb8047b156bb	5107	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> calc finished tls sha384" ) );
rahul_dahiya	0:fb8047b156bb	5108
rahul_dahiya	0:fb8047b156bb	5109	mbedtls_sha512_clone( &sha512, &ssl->handshake->fin_sha512 );
rahul_dahiya	0:fb8047b156bb	5110
rahul_dahiya	0:fb8047b156bb	5111	/*
rahul_dahiya	0:fb8047b156bb	5112	* TLSv1.2:
rahul_dahiya	0:fb8047b156bb	5113	* hash = PRF( master, finished_label,
rahul_dahiya	0:fb8047b156bb	5114	* Hash( handshake ) )[0.11]
rahul_dahiya	0:fb8047b156bb	5115	*/
rahul_dahiya	0:fb8047b156bb	5116
rahul_dahiya	0:fb8047b156bb	5117	#if !defined(MBEDTLS_SHA512_ALT)
rahul_dahiya	0:fb8047b156bb	5118	MBEDTLS_SSL_DEBUG_BUF( 4, "finished sha512 state", (unsigned char *)
rahul_dahiya	0:fb8047b156bb	5119	sha512.state, sizeof( sha512.state ) );
rahul_dahiya	0:fb8047b156bb	5120	#endif
rahul_dahiya	0:fb8047b156bb	5121
rahul_dahiya	0:fb8047b156bb	5122	sender = ( from == MBEDTLS_SSL_IS_CLIENT )
rahul_dahiya	0:fb8047b156bb	5123	? "client finished"
rahul_dahiya	0:fb8047b156bb	5124	: "server finished";
rahul_dahiya	0:fb8047b156bb	5125
rahul_dahiya	0:fb8047b156bb	5126	mbedtls_sha512_finish( &sha512, padbuf );
rahul_dahiya	0:fb8047b156bb	5127
rahul_dahiya	0:fb8047b156bb	5128	ssl->handshake->tls_prf( session->master, 48, sender,
rahul_dahiya	0:fb8047b156bb	5129	padbuf, 48, buf, len );
rahul_dahiya	0:fb8047b156bb	5130
rahul_dahiya	0:fb8047b156bb	5131	MBEDTLS_SSL_DEBUG_BUF( 3, "calc finished result", buf, len );
rahul_dahiya	0:fb8047b156bb	5132
rahul_dahiya	0:fb8047b156bb	5133	mbedtls_sha512_free( &sha512 );
rahul_dahiya	0:fb8047b156bb	5134
rahul_dahiya	0:fb8047b156bb	5135	mbedtls_zeroize( padbuf, sizeof( padbuf ) );
rahul_dahiya	0:fb8047b156bb	5136
rahul_dahiya	0:fb8047b156bb	5137	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= calc finished" ) );
rahul_dahiya	0:fb8047b156bb	5138	}
rahul_dahiya	0:fb8047b156bb	5139	#endif /* MBEDTLS_SHA512_C */
rahul_dahiya	0:fb8047b156bb	5140	#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
rahul_dahiya	0:fb8047b156bb	5141
rahul_dahiya	0:fb8047b156bb	5142	static void ssl_handshake_wrapup_free_hs_transform( mbedtls_ssl_context *ssl )
rahul_dahiya	0:fb8047b156bb	5143	{
rahul_dahiya	0:fb8047b156bb	5144	MBEDTLS_SSL_DEBUG_MSG( 3, ( "=> handshake wrapup: final free" ) );
rahul_dahiya	0:fb8047b156bb	5145
rahul_dahiya	0:fb8047b156bb	5146	/*
rahul_dahiya	0:fb8047b156bb	5147	* Free our handshake params
rahul_dahiya	0:fb8047b156bb	5148	*/
rahul_dahiya	0:fb8047b156bb	5149	mbedtls_ssl_handshake_free( ssl->handshake );
rahul_dahiya	0:fb8047b156bb	5150	mbedtls_free( ssl->handshake );
rahul_dahiya	0:fb8047b156bb	5151	ssl->handshake = NULL;
rahul_dahiya	0:fb8047b156bb	5152
rahul_dahiya	0:fb8047b156bb	5153	/*
rahul_dahiya	0:fb8047b156bb	5154	* Free the previous transform and swith in the current one
rahul_dahiya	0:fb8047b156bb	5155	*/
rahul_dahiya	0:fb8047b156bb	5156	if( ssl->transform )
rahul_dahiya	0:fb8047b156bb	5157	{
rahul_dahiya	0:fb8047b156bb	5158	mbedtls_ssl_transform_free( ssl->transform );
rahul_dahiya	0:fb8047b156bb	5159	mbedtls_free( ssl->transform );
rahul_dahiya	0:fb8047b156bb	5160	}
rahul_dahiya	0:fb8047b156bb	5161	ssl->transform = ssl->transform_negotiate;
rahul_dahiya	0:fb8047b156bb	5162	ssl->transform_negotiate = NULL;
rahul_dahiya	0:fb8047b156bb	5163
rahul_dahiya	0:fb8047b156bb	5164	MBEDTLS_SSL_DEBUG_MSG( 3, ( "<= handshake wrapup: final free" ) );
rahul_dahiya	0:fb8047b156bb	5165	}
rahul_dahiya	0:fb8047b156bb	5166
rahul_dahiya	0:fb8047b156bb	5167	void mbedtls_ssl_handshake_wrapup( mbedtls_ssl_context *ssl )
rahul_dahiya	0:fb8047b156bb	5168	{
rahul_dahiya	0:fb8047b156bb	5169	int resume = ssl->handshake->resume;
rahul_dahiya	0:fb8047b156bb	5170
rahul_dahiya	0:fb8047b156bb	5171	MBEDTLS_SSL_DEBUG_MSG( 3, ( "=> handshake wrapup" ) );
rahul_dahiya	0:fb8047b156bb	5172
rahul_dahiya	0:fb8047b156bb	5173	#if defined(MBEDTLS_SSL_RENEGOTIATION)
rahul_dahiya	0:fb8047b156bb	5174	if( ssl->renego_status == MBEDTLS_SSL_RENEGOTIATION_IN_PROGRESS )
rahul_dahiya	0:fb8047b156bb	5175	{
rahul_dahiya	0:fb8047b156bb	5176	ssl->renego_status = MBEDTLS_SSL_RENEGOTIATION_DONE;
rahul_dahiya	0:fb8047b156bb	5177	ssl->renego_records_seen = 0;
rahul_dahiya	0:fb8047b156bb	5178	}
rahul_dahiya	0:fb8047b156bb	5179	#endif
rahul_dahiya	0:fb8047b156bb	5180
rahul_dahiya	0:fb8047b156bb	5181	/*
rahul_dahiya	0:fb8047b156bb	5182	* Free the previous session and switch in the current one
rahul_dahiya	0:fb8047b156bb	5183	*/
rahul_dahiya	0:fb8047b156bb	5184	if( ssl->session )
rahul_dahiya	0:fb8047b156bb	5185	{
rahul_dahiya	0:fb8047b156bb	5186	#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
rahul_dahiya	0:fb8047b156bb	5187	/* RFC 7366 3.1: keep the EtM state */
rahul_dahiya	0:fb8047b156bb	5188	ssl->session_negotiate->encrypt_then_mac =
rahul_dahiya	0:fb8047b156bb	5189	ssl->session->encrypt_then_mac;
rahul_dahiya	0:fb8047b156bb	5190	#endif
rahul_dahiya	0:fb8047b156bb	5191
rahul_dahiya	0:fb8047b156bb	5192	mbedtls_ssl_session_free( ssl->session );
rahul_dahiya	0:fb8047b156bb	5193	mbedtls_free( ssl->session );
rahul_dahiya	0:fb8047b156bb	5194	}
rahul_dahiya	0:fb8047b156bb	5195	ssl->session = ssl->session_negotiate;
rahul_dahiya	0:fb8047b156bb	5196	ssl->session_negotiate = NULL;
rahul_dahiya	0:fb8047b156bb	5197
rahul_dahiya	0:fb8047b156bb	5198	/*
rahul_dahiya	0:fb8047b156bb	5199	* Add cache entry
rahul_dahiya	0:fb8047b156bb	5200	*/
rahul_dahiya	0:fb8047b156bb	5201	if( ssl->conf->f_set_cache != NULL &&
rahul_dahiya	0:fb8047b156bb	5202	ssl->session->id_len != 0 &&
rahul_dahiya	0:fb8047b156bb	5203	resume == 0 )
rahul_dahiya	0:fb8047b156bb	5204	{
rahul_dahiya	0:fb8047b156bb	5205	if( ssl->conf->f_set_cache( ssl->conf->p_cache, ssl->session ) != 0 )
rahul_dahiya	0:fb8047b156bb	5206	MBEDTLS_SSL_DEBUG_MSG( 1, ( "cache did not store session" ) );
rahul_dahiya	0:fb8047b156bb	5207	}
rahul_dahiya	0:fb8047b156bb	5208
rahul_dahiya	0:fb8047b156bb	5209	#if defined(MBEDTLS_SSL_PROTO_DTLS)
rahul_dahiya	0:fb8047b156bb	5210	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM &&
rahul_dahiya	0:fb8047b156bb	5211	ssl->handshake->flight != NULL )
rahul_dahiya	0:fb8047b156bb	5212	{
rahul_dahiya	0:fb8047b156bb	5213	/* Cancel handshake timer */
rahul_dahiya	0:fb8047b156bb	5214	ssl_set_timer( ssl, 0 );
rahul_dahiya	0:fb8047b156bb	5215
rahul_dahiya	0:fb8047b156bb	5216	/* Keep last flight around in case we need to resend it:
rahul_dahiya	0:fb8047b156bb	5217	* we need the handshake and transform structures for that */
rahul_dahiya	0:fb8047b156bb	5218	MBEDTLS_SSL_DEBUG_MSG( 3, ( "skip freeing handshake and transform" ) );
rahul_dahiya	0:fb8047b156bb	5219	}
rahul_dahiya	0:fb8047b156bb	5220	else
rahul_dahiya	0:fb8047b156bb	5221	#endif
rahul_dahiya	0:fb8047b156bb	5222	ssl_handshake_wrapup_free_hs_transform( ssl );
rahul_dahiya	0:fb8047b156bb	5223
rahul_dahiya	0:fb8047b156bb	5224	ssl->state++;
rahul_dahiya	0:fb8047b156bb	5225
rahul_dahiya	0:fb8047b156bb	5226	MBEDTLS_SSL_DEBUG_MSG( 3, ( "<= handshake wrapup" ) );
rahul_dahiya	0:fb8047b156bb	5227	}
rahul_dahiya	0:fb8047b156bb	5228
rahul_dahiya	0:fb8047b156bb	5229	int mbedtls_ssl_write_finished( mbedtls_ssl_context *ssl )
rahul_dahiya	0:fb8047b156bb	5230	{
rahul_dahiya	0:fb8047b156bb	5231	int ret, hash_len;
rahul_dahiya	0:fb8047b156bb	5232
rahul_dahiya	0:fb8047b156bb	5233	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write finished" ) );
rahul_dahiya	0:fb8047b156bb	5234
rahul_dahiya	0:fb8047b156bb	5235	/*
rahul_dahiya	0:fb8047b156bb	5236	* Set the out_msg pointer to the correct location based on IV length
rahul_dahiya	0:fb8047b156bb	5237	*/
rahul_dahiya	0:fb8047b156bb	5238	if( ssl->minor_ver >= MBEDTLS_SSL_MINOR_VERSION_2 )
rahul_dahiya	0:fb8047b156bb	5239	{
rahul_dahiya	0:fb8047b156bb	5240	ssl->out_msg = ssl->out_iv + ssl->transform_negotiate->ivlen -
rahul_dahiya	0:fb8047b156bb	5241	ssl->transform_negotiate->fixed_ivlen;
rahul_dahiya	0:fb8047b156bb	5242	}
rahul_dahiya	0:fb8047b156bb	5243	else
rahul_dahiya	0:fb8047b156bb	5244	ssl->out_msg = ssl->out_iv;
rahul_dahiya	0:fb8047b156bb	5245
rahul_dahiya	0:fb8047b156bb	5246	ssl->handshake->calc_finished( ssl, ssl->out_msg + 4, ssl->conf->endpoint );
rahul_dahiya	0:fb8047b156bb	5247
rahul_dahiya	0:fb8047b156bb	5248	/*
rahul_dahiya	0:fb8047b156bb	5249	* RFC 5246 7.4.9 (Page 63) says 12 is the default length and ciphersuites
rahul_dahiya	0:fb8047b156bb	5250	* may define some other value. Currently (early 2016), no defined
rahul_dahiya	0:fb8047b156bb	5251	* ciphersuite does this (and this is unlikely to change as activity has
rahul_dahiya	0:fb8047b156bb	5252	* moved to TLS 1.3 now) so we can keep the hardcoded 12 here.
rahul_dahiya	0:fb8047b156bb	5253	*/
rahul_dahiya	0:fb8047b156bb	5254	hash_len = ( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 ) ? 36 : 12;
rahul_dahiya	0:fb8047b156bb	5255
rahul_dahiya	0:fb8047b156bb	5256	#if defined(MBEDTLS_SSL_RENEGOTIATION)
rahul_dahiya	0:fb8047b156bb	5257	ssl->verify_data_len = hash_len;
rahul_dahiya	0:fb8047b156bb	5258	memcpy( ssl->own_verify_data, ssl->out_msg + 4, hash_len );
rahul_dahiya	0:fb8047b156bb	5259	#endif
rahul_dahiya	0:fb8047b156bb	5260
rahul_dahiya	0:fb8047b156bb	5261	ssl->out_msglen = 4 + hash_len;
rahul_dahiya	0:fb8047b156bb	5262	ssl->out_msgtype = MBEDTLS_SSL_MSG_HANDSHAKE;
rahul_dahiya	0:fb8047b156bb	5263	ssl->out_msg[0] = MBEDTLS_SSL_HS_FINISHED;
rahul_dahiya	0:fb8047b156bb	5264
rahul_dahiya	0:fb8047b156bb	5265	/*
rahul_dahiya	0:fb8047b156bb	5266	* In case of session resuming, invert the client and server
rahul_dahiya	0:fb8047b156bb	5267	* ChangeCipherSpec messages order.
rahul_dahiya	0:fb8047b156bb	5268	*/
rahul_dahiya	0:fb8047b156bb	5269	if( ssl->handshake->resume != 0 )
rahul_dahiya	0:fb8047b156bb	5270	{
rahul_dahiya	0:fb8047b156bb	5271	#if defined(MBEDTLS_SSL_CLI_C)
rahul_dahiya	0:fb8047b156bb	5272	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_CLIENT )
rahul_dahiya	0:fb8047b156bb	5273	ssl->state = MBEDTLS_SSL_HANDSHAKE_WRAPUP;
rahul_dahiya	0:fb8047b156bb	5274	#endif
rahul_dahiya	0:fb8047b156bb	5275	#if defined(MBEDTLS_SSL_SRV_C)
rahul_dahiya	0:fb8047b156bb	5276	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER )
rahul_dahiya	0:fb8047b156bb	5277	ssl->state = MBEDTLS_SSL_CLIENT_CHANGE_CIPHER_SPEC;
rahul_dahiya	0:fb8047b156bb	5278	#endif
rahul_dahiya	0:fb8047b156bb	5279	}
rahul_dahiya	0:fb8047b156bb	5280	else
rahul_dahiya	0:fb8047b156bb	5281	ssl->state++;
rahul_dahiya	0:fb8047b156bb	5282
rahul_dahiya	0:fb8047b156bb	5283	/*
rahul_dahiya	0:fb8047b156bb	5284	* Switch to our negotiated transform and session parameters for outbound
rahul_dahiya	0:fb8047b156bb	5285	* data.
rahul_dahiya	0:fb8047b156bb	5286	*/
rahul_dahiya	0:fb8047b156bb	5287	MBEDTLS_SSL_DEBUG_MSG( 3, ( "switching to new transform spec for outbound data" ) );
rahul_dahiya	0:fb8047b156bb	5288
rahul_dahiya	0:fb8047b156bb	5289	#if defined(MBEDTLS_SSL_PROTO_DTLS)
rahul_dahiya	0:fb8047b156bb	5290	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
rahul_dahiya	0:fb8047b156bb	5291	{
rahul_dahiya	0:fb8047b156bb	5292	unsigned char i;
rahul_dahiya	0:fb8047b156bb	5293
rahul_dahiya	0:fb8047b156bb	5294	/* Remember current epoch settings for resending */
rahul_dahiya	0:fb8047b156bb	5295	ssl->handshake->alt_transform_out = ssl->transform_out;
rahul_dahiya	0:fb8047b156bb	5296	memcpy( ssl->handshake->alt_out_ctr, ssl->out_ctr, 8 );
rahul_dahiya	0:fb8047b156bb	5297
rahul_dahiya	0:fb8047b156bb	5298	/* Set sequence_number to zero */
rahul_dahiya	0:fb8047b156bb	5299	memset( ssl->out_ctr + 2, 0, 6 );
rahul_dahiya	0:fb8047b156bb	5300
rahul_dahiya	0:fb8047b156bb	5301	/* Increment epoch */
rahul_dahiya	0:fb8047b156bb	5302	for( i = 2; i > 0; i-- )
rahul_dahiya	0:fb8047b156bb	5303	if( ++ssl->out_ctr[i - 1] != 0 )
rahul_dahiya	0:fb8047b156bb	5304	break;
rahul_dahiya	0:fb8047b156bb	5305
rahul_dahiya	0:fb8047b156bb	5306	/* The loop goes to its end iff the counter is wrapping */
rahul_dahiya	0:fb8047b156bb	5307	if( i == 0 )
rahul_dahiya	0:fb8047b156bb	5308	{
rahul_dahiya	0:fb8047b156bb	5309	MBEDTLS_SSL_DEBUG_MSG( 1, ( "DTLS epoch would wrap" ) );
rahul_dahiya	0:fb8047b156bb	5310	return( MBEDTLS_ERR_SSL_COUNTER_WRAPPING );
rahul_dahiya	0:fb8047b156bb	5311	}
rahul_dahiya	0:fb8047b156bb	5312	}
rahul_dahiya	0:fb8047b156bb	5313	else
rahul_dahiya	0:fb8047b156bb	5314	#endif /* MBEDTLS_SSL_PROTO_DTLS */
rahul_dahiya	0:fb8047b156bb	5315	memset( ssl->out_ctr, 0, 8 );
rahul_dahiya	0:fb8047b156bb	5316
rahul_dahiya	0:fb8047b156bb	5317	ssl->transform_out = ssl->transform_negotiate;
rahul_dahiya	0:fb8047b156bb	5318	ssl->session_out = ssl->session_negotiate;
rahul_dahiya	0:fb8047b156bb	5319
rahul_dahiya	0:fb8047b156bb	5320	#if defined(MBEDTLS_SSL_HW_RECORD_ACCEL)
rahul_dahiya	0:fb8047b156bb	5321	if( mbedtls_ssl_hw_record_activate != NULL )
rahul_dahiya	0:fb8047b156bb	5322	{
rahul_dahiya	0:fb8047b156bb	5323	if( ( ret = mbedtls_ssl_hw_record_activate( ssl, MBEDTLS_SSL_CHANNEL_OUTBOUND ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	5324	{
rahul_dahiya	0:fb8047b156bb	5325	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_hw_record_activate", ret );
rahul_dahiya	0:fb8047b156bb	5326	return( MBEDTLS_ERR_SSL_HW_ACCEL_FAILED );
rahul_dahiya	0:fb8047b156bb	5327	}
rahul_dahiya	0:fb8047b156bb	5328	}
rahul_dahiya	0:fb8047b156bb	5329	#endif
rahul_dahiya	0:fb8047b156bb	5330
rahul_dahiya	0:fb8047b156bb	5331	#if defined(MBEDTLS_SSL_PROTO_DTLS)
rahul_dahiya	0:fb8047b156bb	5332	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
rahul_dahiya	0:fb8047b156bb	5333	mbedtls_ssl_send_flight_completed( ssl );
rahul_dahiya	0:fb8047b156bb	5334	#endif
rahul_dahiya	0:fb8047b156bb	5335
rahul_dahiya	0:fb8047b156bb	5336	if( ( ret = mbedtls_ssl_write_record( ssl ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	5337	{
rahul_dahiya	0:fb8047b156bb	5338	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_write_record", ret );
rahul_dahiya	0:fb8047b156bb	5339	return( ret );
rahul_dahiya	0:fb8047b156bb	5340	}
rahul_dahiya	0:fb8047b156bb	5341
rahul_dahiya	0:fb8047b156bb	5342	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= write finished" ) );
rahul_dahiya	0:fb8047b156bb	5343
rahul_dahiya	0:fb8047b156bb	5344	return( 0 );
rahul_dahiya	0:fb8047b156bb	5345	}
rahul_dahiya	0:fb8047b156bb	5346
rahul_dahiya	0:fb8047b156bb	5347	#if defined(MBEDTLS_SSL_PROTO_SSL3)
rahul_dahiya	0:fb8047b156bb	5348	#define SSL_MAX_HASH_LEN 36
rahul_dahiya	0:fb8047b156bb	5349	#else
rahul_dahiya	0:fb8047b156bb	5350	#define SSL_MAX_HASH_LEN 12
rahul_dahiya	0:fb8047b156bb	5351	#endif
rahul_dahiya	0:fb8047b156bb	5352
rahul_dahiya	0:fb8047b156bb	5353	int mbedtls_ssl_parse_finished( mbedtls_ssl_context *ssl )
rahul_dahiya	0:fb8047b156bb	5354	{
rahul_dahiya	0:fb8047b156bb	5355	int ret;
rahul_dahiya	0:fb8047b156bb	5356	unsigned int hash_len;
rahul_dahiya	0:fb8047b156bb	5357	unsigned char buf[SSL_MAX_HASH_LEN];
rahul_dahiya	0:fb8047b156bb	5358
rahul_dahiya	0:fb8047b156bb	5359	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> parse finished" ) );
rahul_dahiya	0:fb8047b156bb	5360
rahul_dahiya	0:fb8047b156bb	5361	ssl->handshake->calc_finished( ssl, buf, ssl->conf->endpoint ^ 1 );
rahul_dahiya	0:fb8047b156bb	5362
rahul_dahiya	0:fb8047b156bb	5363	if( ( ret = mbedtls_ssl_read_record( ssl ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	5364	{
rahul_dahiya	0:fb8047b156bb	5365	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_read_record", ret );
rahul_dahiya	0:fb8047b156bb	5366	return( ret );
rahul_dahiya	0:fb8047b156bb	5367	}
rahul_dahiya	0:fb8047b156bb	5368
rahul_dahiya	0:fb8047b156bb	5369	if( ssl->in_msgtype != MBEDTLS_SSL_MSG_HANDSHAKE )
rahul_dahiya	0:fb8047b156bb	5370	{
rahul_dahiya	0:fb8047b156bb	5371	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad finished message" ) );
rahul_dahiya	0:fb8047b156bb	5372	mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
rahul_dahiya	0:fb8047b156bb	5373	MBEDTLS_SSL_ALERT_MSG_UNEXPECTED_MESSAGE );
rahul_dahiya	0:fb8047b156bb	5374	return( MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE );
rahul_dahiya	0:fb8047b156bb	5375	}
rahul_dahiya	0:fb8047b156bb	5376
rahul_dahiya	0:fb8047b156bb	5377	/* There is currently no ciphersuite using another length with TLS 1.2 */
rahul_dahiya	0:fb8047b156bb	5378	#if defined(MBEDTLS_SSL_PROTO_SSL3)
rahul_dahiya	0:fb8047b156bb	5379	if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 )
rahul_dahiya	0:fb8047b156bb	5380	hash_len = 36;
rahul_dahiya	0:fb8047b156bb	5381	else
rahul_dahiya	0:fb8047b156bb	5382	#endif
rahul_dahiya	0:fb8047b156bb	5383	hash_len = 12;
rahul_dahiya	0:fb8047b156bb	5384
rahul_dahiya	0:fb8047b156bb	5385	if( ssl->in_msg[0] != MBEDTLS_SSL_HS_FINISHED \|\|
rahul_dahiya	0:fb8047b156bb	5386	ssl->in_hslen != mbedtls_ssl_hs_hdr_len( ssl ) + hash_len )
rahul_dahiya	0:fb8047b156bb	5387	{
rahul_dahiya	0:fb8047b156bb	5388	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad finished message" ) );
rahul_dahiya	0:fb8047b156bb	5389	mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
rahul_dahiya	0:fb8047b156bb	5390	MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
rahul_dahiya	0:fb8047b156bb	5391	return( MBEDTLS_ERR_SSL_BAD_HS_FINISHED );
rahul_dahiya	0:fb8047b156bb	5392	}
rahul_dahiya	0:fb8047b156bb	5393
rahul_dahiya	0:fb8047b156bb	5394	if( mbedtls_ssl_safer_memcmp( ssl->in_msg + mbedtls_ssl_hs_hdr_len( ssl ),
rahul_dahiya	0:fb8047b156bb	5395	buf, hash_len ) != 0 )
rahul_dahiya	0:fb8047b156bb	5396	{
rahul_dahiya	0:fb8047b156bb	5397	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad finished message" ) );
rahul_dahiya	0:fb8047b156bb	5398	mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
rahul_dahiya	0:fb8047b156bb	5399	MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
rahul_dahiya	0:fb8047b156bb	5400	return( MBEDTLS_ERR_SSL_BAD_HS_FINISHED );
rahul_dahiya	0:fb8047b156bb	5401	}
rahul_dahiya	0:fb8047b156bb	5402
rahul_dahiya	0:fb8047b156bb	5403	#if defined(MBEDTLS_SSL_RENEGOTIATION)
rahul_dahiya	0:fb8047b156bb	5404	ssl->verify_data_len = hash_len;
rahul_dahiya	0:fb8047b156bb	5405	memcpy( ssl->peer_verify_data, buf, hash_len );
rahul_dahiya	0:fb8047b156bb	5406	#endif
rahul_dahiya	0:fb8047b156bb	5407
rahul_dahiya	0:fb8047b156bb	5408	if( ssl->handshake->resume != 0 )
rahul_dahiya	0:fb8047b156bb	5409	{
rahul_dahiya	0:fb8047b156bb	5410	#if defined(MBEDTLS_SSL_CLI_C)
rahul_dahiya	0:fb8047b156bb	5411	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_CLIENT )
rahul_dahiya	0:fb8047b156bb	5412	ssl->state = MBEDTLS_SSL_CLIENT_CHANGE_CIPHER_SPEC;
rahul_dahiya	0:fb8047b156bb	5413	#endif
rahul_dahiya	0:fb8047b156bb	5414	#if defined(MBEDTLS_SSL_SRV_C)
rahul_dahiya	0:fb8047b156bb	5415	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER )
rahul_dahiya	0:fb8047b156bb	5416	ssl->state = MBEDTLS_SSL_HANDSHAKE_WRAPUP;
rahul_dahiya	0:fb8047b156bb	5417	#endif
rahul_dahiya	0:fb8047b156bb	5418	}
rahul_dahiya	0:fb8047b156bb	5419	else
rahul_dahiya	0:fb8047b156bb	5420	ssl->state++;
rahul_dahiya	0:fb8047b156bb	5421
rahul_dahiya	0:fb8047b156bb	5422	#if defined(MBEDTLS_SSL_PROTO_DTLS)
rahul_dahiya	0:fb8047b156bb	5423	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
rahul_dahiya	0:fb8047b156bb	5424	mbedtls_ssl_recv_flight_completed( ssl );
rahul_dahiya	0:fb8047b156bb	5425	#endif
rahul_dahiya	0:fb8047b156bb	5426
rahul_dahiya	0:fb8047b156bb	5427	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= parse finished" ) );
rahul_dahiya	0:fb8047b156bb	5428
rahul_dahiya	0:fb8047b156bb	5429	return( 0 );
rahul_dahiya	0:fb8047b156bb	5430	}
rahul_dahiya	0:fb8047b156bb	5431
rahul_dahiya	0:fb8047b156bb	5432	static void ssl_handshake_params_init( mbedtls_ssl_handshake_params *handshake )
rahul_dahiya	0:fb8047b156bb	5433	{
rahul_dahiya	0:fb8047b156bb	5434	memset( handshake, 0, sizeof( mbedtls_ssl_handshake_params ) );
rahul_dahiya	0:fb8047b156bb	5435
rahul_dahiya	0:fb8047b156bb	5436	#if defined(MBEDTLS_SSL_PROTO_SSL3) \|\| defined(MBEDTLS_SSL_PROTO_TLS1) \|\| \
rahul_dahiya	0:fb8047b156bb	5437	defined(MBEDTLS_SSL_PROTO_TLS1_1)
rahul_dahiya	0:fb8047b156bb	5438	mbedtls_md5_init( &handshake->fin_md5 );
rahul_dahiya	0:fb8047b156bb	5439	mbedtls_sha1_init( &handshake->fin_sha1 );
rahul_dahiya	0:fb8047b156bb	5440	mbedtls_md5_starts( &handshake->fin_md5 );
rahul_dahiya	0:fb8047b156bb	5441	mbedtls_sha1_starts( &handshake->fin_sha1 );
rahul_dahiya	0:fb8047b156bb	5442	#endif
rahul_dahiya	0:fb8047b156bb	5443	#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
rahul_dahiya	0:fb8047b156bb	5444	#if defined(MBEDTLS_SHA256_C)
rahul_dahiya	0:fb8047b156bb	5445	mbedtls_sha256_init( &handshake->fin_sha256 );
rahul_dahiya	0:fb8047b156bb	5446	mbedtls_sha256_starts( &handshake->fin_sha256, 0 );
rahul_dahiya	0:fb8047b156bb	5447	#endif
rahul_dahiya	0:fb8047b156bb	5448	#if defined(MBEDTLS_SHA512_C)
rahul_dahiya	0:fb8047b156bb	5449	mbedtls_sha512_init( &handshake->fin_sha512 );
rahul_dahiya	0:fb8047b156bb	5450	mbedtls_sha512_starts( &handshake->fin_sha512, 1 );
rahul_dahiya	0:fb8047b156bb	5451	#endif
rahul_dahiya	0:fb8047b156bb	5452	#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
rahul_dahiya	0:fb8047b156bb	5453
rahul_dahiya	0:fb8047b156bb	5454	handshake->update_checksum = ssl_update_checksum_start;
rahul_dahiya	0:fb8047b156bb	5455
rahul_dahiya	0:fb8047b156bb	5456	#if defined(MBEDTLS_SSL_PROTO_TLS1_2) && \
rahul_dahiya	0:fb8047b156bb	5457	defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
rahul_dahiya	0:fb8047b156bb	5458	mbedtls_ssl_sig_hash_set_init( &handshake->hash_algs );
rahul_dahiya	0:fb8047b156bb	5459	#endif
rahul_dahiya	0:fb8047b156bb	5460
rahul_dahiya	0:fb8047b156bb	5461	#if defined(MBEDTLS_DHM_C)
rahul_dahiya	0:fb8047b156bb	5462	mbedtls_dhm_init( &handshake->dhm_ctx );
rahul_dahiya	0:fb8047b156bb	5463	#endif
rahul_dahiya	0:fb8047b156bb	5464	#if defined(MBEDTLS_ECDH_C)
rahul_dahiya	0:fb8047b156bb	5465	mbedtls_ecdh_init( &handshake->ecdh_ctx );
rahul_dahiya	0:fb8047b156bb	5466	#endif
rahul_dahiya	0:fb8047b156bb	5467	#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
rahul_dahiya	0:fb8047b156bb	5468	mbedtls_ecjpake_init( &handshake->ecjpake_ctx );
rahul_dahiya	0:fb8047b156bb	5469	#if defined(MBEDTLS_SSL_CLI_C)
rahul_dahiya	0:fb8047b156bb	5470	handshake->ecjpake_cache = NULL;
rahul_dahiya	0:fb8047b156bb	5471	handshake->ecjpake_cache_len = 0;
rahul_dahiya	0:fb8047b156bb	5472	#endif
rahul_dahiya	0:fb8047b156bb	5473	#endif
rahul_dahiya	0:fb8047b156bb	5474
rahul_dahiya	0:fb8047b156bb	5475	#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
rahul_dahiya	0:fb8047b156bb	5476	handshake->sni_authmode = MBEDTLS_SSL_VERIFY_UNSET;
rahul_dahiya	0:fb8047b156bb	5477	#endif
rahul_dahiya	0:fb8047b156bb	5478	}
rahul_dahiya	0:fb8047b156bb	5479
rahul_dahiya	0:fb8047b156bb	5480	static void ssl_transform_init( mbedtls_ssl_transform *transform )
rahul_dahiya	0:fb8047b156bb	5481	{
rahul_dahiya	0:fb8047b156bb	5482	memset( transform, 0, sizeof(mbedtls_ssl_transform) );
rahul_dahiya	0:fb8047b156bb	5483
rahul_dahiya	0:fb8047b156bb	5484	mbedtls_cipher_init( &transform->cipher_ctx_enc );
rahul_dahiya	0:fb8047b156bb	5485	mbedtls_cipher_init( &transform->cipher_ctx_dec );
rahul_dahiya	0:fb8047b156bb	5486
rahul_dahiya	0:fb8047b156bb	5487	mbedtls_md_init( &transform->md_ctx_enc );
rahul_dahiya	0:fb8047b156bb	5488	mbedtls_md_init( &transform->md_ctx_dec );
rahul_dahiya	0:fb8047b156bb	5489	}
rahul_dahiya	0:fb8047b156bb	5490
rahul_dahiya	0:fb8047b156bb	5491	void mbedtls_ssl_session_init( mbedtls_ssl_session *session )
rahul_dahiya	0:fb8047b156bb	5492	{
rahul_dahiya	0:fb8047b156bb	5493	memset( session, 0, sizeof(mbedtls_ssl_session) );
rahul_dahiya	0:fb8047b156bb	5494	}
rahul_dahiya	0:fb8047b156bb	5495
rahul_dahiya	0:fb8047b156bb	5496	static int ssl_handshake_init( mbedtls_ssl_context *ssl )
rahul_dahiya	0:fb8047b156bb	5497	{
rahul_dahiya	0:fb8047b156bb	5498	/* Clear old handshake information if present */
rahul_dahiya	0:fb8047b156bb	5499	if( ssl->transform_negotiate )
rahul_dahiya	0:fb8047b156bb	5500	mbedtls_ssl_transform_free( ssl->transform_negotiate );
rahul_dahiya	0:fb8047b156bb	5501	if( ssl->session_negotiate )
rahul_dahiya	0:fb8047b156bb	5502	mbedtls_ssl_session_free( ssl->session_negotiate );
rahul_dahiya	0:fb8047b156bb	5503	if( ssl->handshake )
rahul_dahiya	0:fb8047b156bb	5504	mbedtls_ssl_handshake_free( ssl->handshake );
rahul_dahiya	0:fb8047b156bb	5505
rahul_dahiya	0:fb8047b156bb	5506	/*
rahul_dahiya	0:fb8047b156bb	5507	* Either the pointers are now NULL or cleared properly and can be freed.
rahul_dahiya	0:fb8047b156bb	5508	* Now allocate missing structures.
rahul_dahiya	0:fb8047b156bb	5509	*/
rahul_dahiya	0:fb8047b156bb	5510	if( ssl->transform_negotiate == NULL )
rahul_dahiya	0:fb8047b156bb	5511	{
rahul_dahiya	0:fb8047b156bb	5512	ssl->transform_negotiate = mbedtls_calloc( 1, sizeof(mbedtls_ssl_transform) );
rahul_dahiya	0:fb8047b156bb	5513	}
rahul_dahiya	0:fb8047b156bb	5514
rahul_dahiya	0:fb8047b156bb	5515	if( ssl->session_negotiate == NULL )
rahul_dahiya	0:fb8047b156bb	5516	{
rahul_dahiya	0:fb8047b156bb	5517	ssl->session_negotiate = mbedtls_calloc( 1, sizeof(mbedtls_ssl_session) );
rahul_dahiya	0:fb8047b156bb	5518	}
rahul_dahiya	0:fb8047b156bb	5519
rahul_dahiya	0:fb8047b156bb	5520	if( ssl->handshake == NULL )
rahul_dahiya	0:fb8047b156bb	5521	{
rahul_dahiya	0:fb8047b156bb	5522	ssl->handshake = mbedtls_calloc( 1, sizeof(mbedtls_ssl_handshake_params) );
rahul_dahiya	0:fb8047b156bb	5523	}
rahul_dahiya	0:fb8047b156bb	5524
rahul_dahiya	0:fb8047b156bb	5525	/* All pointers should exist and can be directly freed without issue */
rahul_dahiya	0:fb8047b156bb	5526	if( ssl->handshake == NULL \|\|
rahul_dahiya	0:fb8047b156bb	5527	ssl->transform_negotiate == NULL \|\|
rahul_dahiya	0:fb8047b156bb	5528	ssl->session_negotiate == NULL )
rahul_dahiya	0:fb8047b156bb	5529	{
rahul_dahiya	0:fb8047b156bb	5530	MBEDTLS_SSL_DEBUG_MSG( 1, ( "alloc() of ssl sub-contexts failed" ) );
rahul_dahiya	0:fb8047b156bb	5531
rahul_dahiya	0:fb8047b156bb	5532	mbedtls_free( ssl->handshake );
rahul_dahiya	0:fb8047b156bb	5533	mbedtls_free( ssl->transform_negotiate );
rahul_dahiya	0:fb8047b156bb	5534	mbedtls_free( ssl->session_negotiate );
rahul_dahiya	0:fb8047b156bb	5535
rahul_dahiya	0:fb8047b156bb	5536	ssl->handshake = NULL;
rahul_dahiya	0:fb8047b156bb	5537	ssl->transform_negotiate = NULL;
rahul_dahiya	0:fb8047b156bb	5538	ssl->session_negotiate = NULL;
rahul_dahiya	0:fb8047b156bb	5539
rahul_dahiya	0:fb8047b156bb	5540	return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
rahul_dahiya	0:fb8047b156bb	5541	}
rahul_dahiya	0:fb8047b156bb	5542
rahul_dahiya	0:fb8047b156bb	5543	/* Initialize structures */
rahul_dahiya	0:fb8047b156bb	5544	mbedtls_ssl_session_init( ssl->session_negotiate );
rahul_dahiya	0:fb8047b156bb	5545	ssl_transform_init( ssl->transform_negotiate );
rahul_dahiya	0:fb8047b156bb	5546	ssl_handshake_params_init( ssl->handshake );
rahul_dahiya	0:fb8047b156bb	5547
rahul_dahiya	0:fb8047b156bb	5548	#if defined(MBEDTLS_SSL_PROTO_DTLS)
rahul_dahiya	0:fb8047b156bb	5549	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
rahul_dahiya	0:fb8047b156bb	5550	{
rahul_dahiya	0:fb8047b156bb	5551	ssl->handshake->alt_transform_out = ssl->transform_out;
rahul_dahiya	0:fb8047b156bb	5552
rahul_dahiya	0:fb8047b156bb	5553	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_CLIENT )
rahul_dahiya	0:fb8047b156bb	5554	ssl->handshake->retransmit_state = MBEDTLS_SSL_RETRANS_PREPARING;
rahul_dahiya	0:fb8047b156bb	5555	else
rahul_dahiya	0:fb8047b156bb	5556	ssl->handshake->retransmit_state = MBEDTLS_SSL_RETRANS_WAITING;
rahul_dahiya	0:fb8047b156bb	5557
rahul_dahiya	0:fb8047b156bb	5558	ssl_set_timer( ssl, 0 );
rahul_dahiya	0:fb8047b156bb	5559	}
rahul_dahiya	0:fb8047b156bb	5560	#endif
rahul_dahiya	0:fb8047b156bb	5561
rahul_dahiya	0:fb8047b156bb	5562	return( 0 );
rahul_dahiya	0:fb8047b156bb	5563	}
rahul_dahiya	0:fb8047b156bb	5564
rahul_dahiya	0:fb8047b156bb	5565	#if defined(MBEDTLS_SSL_DTLS_HELLO_VERIFY) && defined(MBEDTLS_SSL_SRV_C)
rahul_dahiya	0:fb8047b156bb	5566	/* Dummy cookie callbacks for defaults */
rahul_dahiya	0:fb8047b156bb	5567	static int ssl_cookie_write_dummy( void *ctx,
rahul_dahiya	0:fb8047b156bb	5568	unsigned char *p, unsigned char end,
rahul_dahiya	0:fb8047b156bb	5569	const unsigned char *cli_id, size_t cli_id_len )
rahul_dahiya	0:fb8047b156bb	5570	{
rahul_dahiya	0:fb8047b156bb	5571	((void) ctx);
rahul_dahiya	0:fb8047b156bb	5572	((void) p);
rahul_dahiya	0:fb8047b156bb	5573	((void) end);
rahul_dahiya	0:fb8047b156bb	5574	((void) cli_id);
rahul_dahiya	0:fb8047b156bb	5575	((void) cli_id_len);
rahul_dahiya	0:fb8047b156bb	5576
rahul_dahiya	0:fb8047b156bb	5577	return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE );
rahul_dahiya	0:fb8047b156bb	5578	}
rahul_dahiya	0:fb8047b156bb	5579
rahul_dahiya	0:fb8047b156bb	5580	static int ssl_cookie_check_dummy( void *ctx,
rahul_dahiya	0:fb8047b156bb	5581	const unsigned char *cookie, size_t cookie_len,
rahul_dahiya	0:fb8047b156bb	5582	const unsigned char *cli_id, size_t cli_id_len )
rahul_dahiya	0:fb8047b156bb	5583	{
rahul_dahiya	0:fb8047b156bb	5584	((void) ctx);
rahul_dahiya	0:fb8047b156bb	5585	((void) cookie);
rahul_dahiya	0:fb8047b156bb	5586	((void) cookie_len);
rahul_dahiya	0:fb8047b156bb	5587	((void) cli_id);
rahul_dahiya	0:fb8047b156bb	5588	((void) cli_id_len);
rahul_dahiya	0:fb8047b156bb	5589
rahul_dahiya	0:fb8047b156bb	5590	return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE );
rahul_dahiya	0:fb8047b156bb	5591	}
rahul_dahiya	0:fb8047b156bb	5592	#endif /* MBEDTLS_SSL_DTLS_HELLO_VERIFY && MBEDTLS_SSL_SRV_C */
rahul_dahiya	0:fb8047b156bb	5593
rahul_dahiya	0:fb8047b156bb	5594	/*
rahul_dahiya	0:fb8047b156bb	5595	* Initialize an SSL context
rahul_dahiya	0:fb8047b156bb	5596	*/
rahul_dahiya	0:fb8047b156bb	5597	void mbedtls_ssl_init( mbedtls_ssl_context *ssl )
rahul_dahiya	0:fb8047b156bb	5598	{
rahul_dahiya	0:fb8047b156bb	5599	memset( ssl, 0, sizeof( mbedtls_ssl_context ) );
rahul_dahiya	0:fb8047b156bb	5600	}
rahul_dahiya	0:fb8047b156bb	5601
rahul_dahiya	0:fb8047b156bb	5602	/*
rahul_dahiya	0:fb8047b156bb	5603	* Setup an SSL context
rahul_dahiya	0:fb8047b156bb	5604	*/
rahul_dahiya	0:fb8047b156bb	5605	int mbedtls_ssl_setup( mbedtls_ssl_context *ssl,
rahul_dahiya	0:fb8047b156bb	5606	const mbedtls_ssl_config *conf )
rahul_dahiya	0:fb8047b156bb	5607	{
rahul_dahiya	0:fb8047b156bb	5608	int ret;
rahul_dahiya	0:fb8047b156bb	5609	const size_t len = MBEDTLS_SSL_BUFFER_LEN;
rahul_dahiya	0:fb8047b156bb	5610
rahul_dahiya	0:fb8047b156bb	5611	ssl->conf = conf;
rahul_dahiya	0:fb8047b156bb	5612
rahul_dahiya	0:fb8047b156bb	5613	/*
rahul_dahiya	0:fb8047b156bb	5614	* Prepare base structures
rahul_dahiya	0:fb8047b156bb	5615	*/
rahul_dahiya	0:fb8047b156bb	5616	if( ( ssl-> in_buf = mbedtls_calloc( 1, len ) ) == NULL \|\|
rahul_dahiya	0:fb8047b156bb	5617	( ssl->out_buf = mbedtls_calloc( 1, len ) ) == NULL )
rahul_dahiya	0:fb8047b156bb	5618	{
rahul_dahiya	0:fb8047b156bb	5619	MBEDTLS_SSL_DEBUG_MSG( 1, ( "alloc(%d bytes) failed", len ) );
rahul_dahiya	0:fb8047b156bb	5620	mbedtls_free( ssl->in_buf );
rahul_dahiya	0:fb8047b156bb	5621	ssl->in_buf = NULL;
rahul_dahiya	0:fb8047b156bb	5622	return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
rahul_dahiya	0:fb8047b156bb	5623	}
rahul_dahiya	0:fb8047b156bb	5624
rahul_dahiya	0:fb8047b156bb	5625	#if defined(MBEDTLS_SSL_PROTO_DTLS)
rahul_dahiya	0:fb8047b156bb	5626	if( conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
rahul_dahiya	0:fb8047b156bb	5627	{
rahul_dahiya	0:fb8047b156bb	5628	ssl->out_hdr = ssl->out_buf;
rahul_dahiya	0:fb8047b156bb	5629	ssl->out_ctr = ssl->out_buf + 3;
rahul_dahiya	0:fb8047b156bb	5630	ssl->out_len = ssl->out_buf + 11;
rahul_dahiya	0:fb8047b156bb	5631	ssl->out_iv = ssl->out_buf + 13;
rahul_dahiya	0:fb8047b156bb	5632	ssl->out_msg = ssl->out_buf + 13;
rahul_dahiya	0:fb8047b156bb	5633
rahul_dahiya	0:fb8047b156bb	5634	ssl->in_hdr = ssl->in_buf;
rahul_dahiya	0:fb8047b156bb	5635	ssl->in_ctr = ssl->in_buf + 3;
rahul_dahiya	0:fb8047b156bb	5636	ssl->in_len = ssl->in_buf + 11;
rahul_dahiya	0:fb8047b156bb	5637	ssl->in_iv = ssl->in_buf + 13;
rahul_dahiya	0:fb8047b156bb	5638	ssl->in_msg = ssl->in_buf + 13;
rahul_dahiya	0:fb8047b156bb	5639	}
rahul_dahiya	0:fb8047b156bb	5640	else
rahul_dahiya	0:fb8047b156bb	5641	#endif
rahul_dahiya	0:fb8047b156bb	5642	{
rahul_dahiya	0:fb8047b156bb	5643	ssl->out_ctr = ssl->out_buf;
rahul_dahiya	0:fb8047b156bb	5644	ssl->out_hdr = ssl->out_buf + 8;
rahul_dahiya	0:fb8047b156bb	5645	ssl->out_len = ssl->out_buf + 11;
rahul_dahiya	0:fb8047b156bb	5646	ssl->out_iv = ssl->out_buf + 13;
rahul_dahiya	0:fb8047b156bb	5647	ssl->out_msg = ssl->out_buf + 13;
rahul_dahiya	0:fb8047b156bb	5648
rahul_dahiya	0:fb8047b156bb	5649	ssl->in_ctr = ssl->in_buf;
rahul_dahiya	0:fb8047b156bb	5650	ssl->in_hdr = ssl->in_buf + 8;
rahul_dahiya	0:fb8047b156bb	5651	ssl->in_len = ssl->in_buf + 11;
rahul_dahiya	0:fb8047b156bb	5652	ssl->in_iv = ssl->in_buf + 13;
rahul_dahiya	0:fb8047b156bb	5653	ssl->in_msg = ssl->in_buf + 13;
rahul_dahiya	0:fb8047b156bb	5654	}
rahul_dahiya	0:fb8047b156bb	5655
rahul_dahiya	0:fb8047b156bb	5656	if( ( ret = ssl_handshake_init( ssl ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	5657	return( ret );
rahul_dahiya	0:fb8047b156bb	5658
rahul_dahiya	0:fb8047b156bb	5659	return( 0 );
rahul_dahiya	0:fb8047b156bb	5660	}
rahul_dahiya	0:fb8047b156bb	5661
rahul_dahiya	0:fb8047b156bb	5662	/*
rahul_dahiya	0:fb8047b156bb	5663	* Reset an initialized and used SSL context for re-use while retaining
rahul_dahiya	0:fb8047b156bb	5664	* all application-set variables, function pointers and data.
rahul_dahiya	0:fb8047b156bb	5665	*
rahul_dahiya	0:fb8047b156bb	5666	* If partial is non-zero, keep data in the input buffer and client ID.
rahul_dahiya	0:fb8047b156bb	5667	* (Use when a DTLS client reconnects from the same port.)
rahul_dahiya	0:fb8047b156bb	5668	*/
rahul_dahiya	0:fb8047b156bb	5669	static int ssl_session_reset_int( mbedtls_ssl_context *ssl, int partial )
rahul_dahiya	0:fb8047b156bb	5670	{
rahul_dahiya	0:fb8047b156bb	5671	int ret;
rahul_dahiya	0:fb8047b156bb	5672
rahul_dahiya	0:fb8047b156bb	5673	ssl->state = MBEDTLS_SSL_HELLO_REQUEST;
rahul_dahiya	0:fb8047b156bb	5674
rahul_dahiya	0:fb8047b156bb	5675	/* Cancel any possibly running timer */
rahul_dahiya	0:fb8047b156bb	5676	ssl_set_timer( ssl, 0 );
rahul_dahiya	0:fb8047b156bb	5677
rahul_dahiya	0:fb8047b156bb	5678	#if defined(MBEDTLS_SSL_RENEGOTIATION)
rahul_dahiya	0:fb8047b156bb	5679	ssl->renego_status = MBEDTLS_SSL_INITIAL_HANDSHAKE;
rahul_dahiya	0:fb8047b156bb	5680	ssl->renego_records_seen = 0;
rahul_dahiya	0:fb8047b156bb	5681
rahul_dahiya	0:fb8047b156bb	5682	ssl->verify_data_len = 0;
rahul_dahiya	0:fb8047b156bb	5683	memset( ssl->own_verify_data, 0, MBEDTLS_SSL_VERIFY_DATA_MAX_LEN );
rahul_dahiya	0:fb8047b156bb	5684	memset( ssl->peer_verify_data, 0, MBEDTLS_SSL_VERIFY_DATA_MAX_LEN );
rahul_dahiya	0:fb8047b156bb	5685	#endif
rahul_dahiya	0:fb8047b156bb	5686	ssl->secure_renegotiation = MBEDTLS_SSL_LEGACY_RENEGOTIATION;
rahul_dahiya	0:fb8047b156bb	5687
rahul_dahiya	0:fb8047b156bb	5688	ssl->in_offt = NULL;
rahul_dahiya	0:fb8047b156bb	5689
rahul_dahiya	0:fb8047b156bb	5690	ssl->in_msg = ssl->in_buf + 13;
rahul_dahiya	0:fb8047b156bb	5691	ssl->in_msgtype = 0;
rahul_dahiya	0:fb8047b156bb	5692	ssl->in_msglen = 0;
rahul_dahiya	0:fb8047b156bb	5693	if( partial == 0 )
rahul_dahiya	0:fb8047b156bb	5694	ssl->in_left = 0;
rahul_dahiya	0:fb8047b156bb	5695	#if defined(MBEDTLS_SSL_PROTO_DTLS)
rahul_dahiya	0:fb8047b156bb	5696	ssl->next_record_offset = 0;
rahul_dahiya	0:fb8047b156bb	5697	ssl->in_epoch = 0;
rahul_dahiya	0:fb8047b156bb	5698	#endif
rahul_dahiya	0:fb8047b156bb	5699	#if defined(MBEDTLS_SSL_DTLS_ANTI_REPLAY)
rahul_dahiya	0:fb8047b156bb	5700	ssl_dtls_replay_reset( ssl );
rahul_dahiya	0:fb8047b156bb	5701	#endif
rahul_dahiya	0:fb8047b156bb	5702
rahul_dahiya	0:fb8047b156bb	5703	ssl->in_hslen = 0;
rahul_dahiya	0:fb8047b156bb	5704	ssl->nb_zero = 0;
rahul_dahiya	0:fb8047b156bb	5705
rahul_dahiya	0:fb8047b156bb	5706	ssl->keep_current_message = 0;
rahul_dahiya	0:fb8047b156bb	5707
rahul_dahiya	0:fb8047b156bb	5708	ssl->out_msg = ssl->out_buf + 13;
rahul_dahiya	0:fb8047b156bb	5709	ssl->out_msgtype = 0;
rahul_dahiya	0:fb8047b156bb	5710	ssl->out_msglen = 0;
rahul_dahiya	0:fb8047b156bb	5711	ssl->out_left = 0;
rahul_dahiya	0:fb8047b156bb	5712	#if defined(MBEDTLS_SSL_CBC_RECORD_SPLITTING)
rahul_dahiya	0:fb8047b156bb	5713	if( ssl->split_done != MBEDTLS_SSL_CBC_RECORD_SPLITTING_DISABLED )
rahul_dahiya	0:fb8047b156bb	5714	ssl->split_done = 0;
rahul_dahiya	0:fb8047b156bb	5715	#endif
rahul_dahiya	0:fb8047b156bb	5716
rahul_dahiya	0:fb8047b156bb	5717	ssl->transform_in = NULL;
rahul_dahiya	0:fb8047b156bb	5718	ssl->transform_out = NULL;
rahul_dahiya	0:fb8047b156bb	5719
rahul_dahiya	0:fb8047b156bb	5720	memset( ssl->out_buf, 0, MBEDTLS_SSL_BUFFER_LEN );
rahul_dahiya	0:fb8047b156bb	5721	if( partial == 0 )
rahul_dahiya	0:fb8047b156bb	5722	memset( ssl->in_buf, 0, MBEDTLS_SSL_BUFFER_LEN );
rahul_dahiya	0:fb8047b156bb	5723
rahul_dahiya	0:fb8047b156bb	5724	#if defined(MBEDTLS_SSL_HW_RECORD_ACCEL)
rahul_dahiya	0:fb8047b156bb	5725	if( mbedtls_ssl_hw_record_reset != NULL )
rahul_dahiya	0:fb8047b156bb	5726	{
rahul_dahiya	0:fb8047b156bb	5727	MBEDTLS_SSL_DEBUG_MSG( 2, ( "going for mbedtls_ssl_hw_record_reset()" ) );
rahul_dahiya	0:fb8047b156bb	5728	if( ( ret = mbedtls_ssl_hw_record_reset( ssl ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	5729	{
rahul_dahiya	0:fb8047b156bb	5730	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_hw_record_reset", ret );
rahul_dahiya	0:fb8047b156bb	5731	return( MBEDTLS_ERR_SSL_HW_ACCEL_FAILED );
rahul_dahiya	0:fb8047b156bb	5732	}
rahul_dahiya	0:fb8047b156bb	5733	}
rahul_dahiya	0:fb8047b156bb	5734	#endif
rahul_dahiya	0:fb8047b156bb	5735
rahul_dahiya	0:fb8047b156bb	5736	if( ssl->transform )
rahul_dahiya	0:fb8047b156bb	5737	{
rahul_dahiya	0:fb8047b156bb	5738	mbedtls_ssl_transform_free( ssl->transform );
rahul_dahiya	0:fb8047b156bb	5739	mbedtls_free( ssl->transform );
rahul_dahiya	0:fb8047b156bb	5740	ssl->transform = NULL;
rahul_dahiya	0:fb8047b156bb	5741	}
rahul_dahiya	0:fb8047b156bb	5742
rahul_dahiya	0:fb8047b156bb	5743	if( ssl->session )
rahul_dahiya	0:fb8047b156bb	5744	{
rahul_dahiya	0:fb8047b156bb	5745	mbedtls_ssl_session_free( ssl->session );
rahul_dahiya	0:fb8047b156bb	5746	mbedtls_free( ssl->session );
rahul_dahiya	0:fb8047b156bb	5747	ssl->session = NULL;
rahul_dahiya	0:fb8047b156bb	5748	}
rahul_dahiya	0:fb8047b156bb	5749
rahul_dahiya	0:fb8047b156bb	5750	#if defined(MBEDTLS_SSL_ALPN)
rahul_dahiya	0:fb8047b156bb	5751	ssl->alpn_chosen = NULL;
rahul_dahiya	0:fb8047b156bb	5752	#endif
rahul_dahiya	0:fb8047b156bb	5753
rahul_dahiya	0:fb8047b156bb	5754	#if defined(MBEDTLS_SSL_DTLS_HELLO_VERIFY) && defined(MBEDTLS_SSL_SRV_C)
rahul_dahiya	0:fb8047b156bb	5755	if( partial == 0 )
rahul_dahiya	0:fb8047b156bb	5756	{
rahul_dahiya	0:fb8047b156bb	5757	mbedtls_free( ssl->cli_id );
rahul_dahiya	0:fb8047b156bb	5758	ssl->cli_id = NULL;
rahul_dahiya	0:fb8047b156bb	5759	ssl->cli_id_len = 0;
rahul_dahiya	0:fb8047b156bb	5760	}
rahul_dahiya	0:fb8047b156bb	5761	#endif
rahul_dahiya	0:fb8047b156bb	5762
rahul_dahiya	0:fb8047b156bb	5763	if( ( ret = ssl_handshake_init( ssl ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	5764	return( ret );
rahul_dahiya	0:fb8047b156bb	5765
rahul_dahiya	0:fb8047b156bb	5766	return( 0 );
rahul_dahiya	0:fb8047b156bb	5767	}
rahul_dahiya	0:fb8047b156bb	5768
rahul_dahiya	0:fb8047b156bb	5769	/*
rahul_dahiya	0:fb8047b156bb	5770	* Reset an initialized and used SSL context for re-use while retaining
rahul_dahiya	0:fb8047b156bb	5771	* all application-set variables, function pointers and data.
rahul_dahiya	0:fb8047b156bb	5772	*/
rahul_dahiya	0:fb8047b156bb	5773	int mbedtls_ssl_session_reset( mbedtls_ssl_context *ssl )
rahul_dahiya	0:fb8047b156bb	5774	{
rahul_dahiya	0:fb8047b156bb	5775	return( ssl_session_reset_int( ssl, 0 ) );
rahul_dahiya	0:fb8047b156bb	5776	}
rahul_dahiya	0:fb8047b156bb	5777
rahul_dahiya	0:fb8047b156bb	5778	/*
rahul_dahiya	0:fb8047b156bb	5779	* SSL set accessors
rahul_dahiya	0:fb8047b156bb	5780	*/
rahul_dahiya	0:fb8047b156bb	5781	void mbedtls_ssl_conf_endpoint( mbedtls_ssl_config *conf, int endpoint )
rahul_dahiya	0:fb8047b156bb	5782	{
rahul_dahiya	0:fb8047b156bb	5783	conf->endpoint = endpoint;
rahul_dahiya	0:fb8047b156bb	5784	}
rahul_dahiya	0:fb8047b156bb	5785
rahul_dahiya	0:fb8047b156bb	5786	void mbedtls_ssl_conf_transport( mbedtls_ssl_config *conf, int transport )
rahul_dahiya	0:fb8047b156bb	5787	{
rahul_dahiya	0:fb8047b156bb	5788	conf->transport = transport;
rahul_dahiya	0:fb8047b156bb	5789	}
rahul_dahiya	0:fb8047b156bb	5790
rahul_dahiya	0:fb8047b156bb	5791	#if defined(MBEDTLS_SSL_DTLS_ANTI_REPLAY)
rahul_dahiya	0:fb8047b156bb	5792	void mbedtls_ssl_conf_dtls_anti_replay( mbedtls_ssl_config *conf, char mode )
rahul_dahiya	0:fb8047b156bb	5793	{
rahul_dahiya	0:fb8047b156bb	5794	conf->anti_replay = mode;
rahul_dahiya	0:fb8047b156bb	5795	}
rahul_dahiya	0:fb8047b156bb	5796	#endif
rahul_dahiya	0:fb8047b156bb	5797
rahul_dahiya	0:fb8047b156bb	5798	#if defined(MBEDTLS_SSL_DTLS_BADMAC_LIMIT)
rahul_dahiya	0:fb8047b156bb	5799	void mbedtls_ssl_conf_dtls_badmac_limit( mbedtls_ssl_config *conf, unsigned limit )
rahul_dahiya	0:fb8047b156bb	5800	{
rahul_dahiya	0:fb8047b156bb	5801	conf->badmac_limit = limit;
rahul_dahiya	0:fb8047b156bb	5802	}
rahul_dahiya	0:fb8047b156bb	5803	#endif
rahul_dahiya	0:fb8047b156bb	5804
rahul_dahiya	0:fb8047b156bb	5805	#if defined(MBEDTLS_SSL_PROTO_DTLS)
rahul_dahiya	0:fb8047b156bb	5806	void mbedtls_ssl_conf_handshake_timeout( mbedtls_ssl_config *conf, uint32_t min, uint32_t max )
rahul_dahiya	0:fb8047b156bb	5807	{
rahul_dahiya	0:fb8047b156bb	5808	conf->hs_timeout_min = min;
rahul_dahiya	0:fb8047b156bb	5809	conf->hs_timeout_max = max;
rahul_dahiya	0:fb8047b156bb	5810	}
rahul_dahiya	0:fb8047b156bb	5811	#endif
rahul_dahiya	0:fb8047b156bb	5812
rahul_dahiya	0:fb8047b156bb	5813	void mbedtls_ssl_conf_authmode( mbedtls_ssl_config *conf, int authmode )
rahul_dahiya	0:fb8047b156bb	5814	{
rahul_dahiya	0:fb8047b156bb	5815	conf->authmode = authmode;
rahul_dahiya	0:fb8047b156bb	5816	}
rahul_dahiya	0:fb8047b156bb	5817
rahul_dahiya	0:fb8047b156bb	5818	#if defined(MBEDTLS_X509_CRT_PARSE_C)
rahul_dahiya	0:fb8047b156bb	5819	void mbedtls_ssl_conf_verify( mbedtls_ssl_config *conf,
rahul_dahiya	0:fb8047b156bb	5820	int (f_vrfy)(void , mbedtls_x509_crt , int, uint32_t ),
rahul_dahiya	0:fb8047b156bb	5821	void *p_vrfy )
rahul_dahiya	0:fb8047b156bb	5822	{
rahul_dahiya	0:fb8047b156bb	5823	conf->f_vrfy = f_vrfy;
rahul_dahiya	0:fb8047b156bb	5824	conf->p_vrfy = p_vrfy;
rahul_dahiya	0:fb8047b156bb	5825	}
rahul_dahiya	0:fb8047b156bb	5826	#endif /* MBEDTLS_X509_CRT_PARSE_C */
rahul_dahiya	0:fb8047b156bb	5827
rahul_dahiya	0:fb8047b156bb	5828	void mbedtls_ssl_conf_rng( mbedtls_ssl_config *conf,
rahul_dahiya	0:fb8047b156bb	5829	int (f_rng)(void , unsigned char *, size_t),
rahul_dahiya	0:fb8047b156bb	5830	void *p_rng )
rahul_dahiya	0:fb8047b156bb	5831	{
rahul_dahiya	0:fb8047b156bb	5832	conf->f_rng = f_rng;
rahul_dahiya	0:fb8047b156bb	5833	conf->p_rng = p_rng;
rahul_dahiya	0:fb8047b156bb	5834	}
rahul_dahiya	0:fb8047b156bb	5835
rahul_dahiya	0:fb8047b156bb	5836	void mbedtls_ssl_conf_dbg( mbedtls_ssl_config *conf,
rahul_dahiya	0:fb8047b156bb	5837	void (f_dbg)(void , int, const char , int, const char ),
rahul_dahiya	0:fb8047b156bb	5838	void *p_dbg )
rahul_dahiya	0:fb8047b156bb	5839	{
rahul_dahiya	0:fb8047b156bb	5840	conf->f_dbg = f_dbg;
rahul_dahiya	0:fb8047b156bb	5841	conf->p_dbg = p_dbg;
rahul_dahiya	0:fb8047b156bb	5842	}
rahul_dahiya	0:fb8047b156bb	5843
rahul_dahiya	0:fb8047b156bb	5844	void mbedtls_ssl_set_bio( mbedtls_ssl_context *ssl,
rahul_dahiya	0:fb8047b156bb	5845	void *p_bio,
rahul_dahiya	0:fb8047b156bb	5846	mbedtls_ssl_send_t *f_send,
rahul_dahiya	0:fb8047b156bb	5847	mbedtls_ssl_recv_t *f_recv,
rahul_dahiya	0:fb8047b156bb	5848	mbedtls_ssl_recv_timeout_t *f_recv_timeout )
rahul_dahiya	0:fb8047b156bb	5849	{
rahul_dahiya	0:fb8047b156bb	5850	ssl->p_bio = p_bio;
rahul_dahiya	0:fb8047b156bb	5851	ssl->f_send = f_send;
rahul_dahiya	0:fb8047b156bb	5852	ssl->f_recv = f_recv;
rahul_dahiya	0:fb8047b156bb	5853	ssl->f_recv_timeout = f_recv_timeout;
rahul_dahiya	0:fb8047b156bb	5854	}
rahul_dahiya	0:fb8047b156bb	5855
rahul_dahiya	0:fb8047b156bb	5856	void mbedtls_ssl_conf_read_timeout( mbedtls_ssl_config *conf, uint32_t timeout )
rahul_dahiya	0:fb8047b156bb	5857	{
rahul_dahiya	0:fb8047b156bb	5858	conf->read_timeout = timeout;
rahul_dahiya	0:fb8047b156bb	5859	}
rahul_dahiya	0:fb8047b156bb	5860
rahul_dahiya	0:fb8047b156bb	5861	void mbedtls_ssl_set_timer_cb( mbedtls_ssl_context *ssl,
rahul_dahiya	0:fb8047b156bb	5862	void *p_timer,
rahul_dahiya	0:fb8047b156bb	5863	mbedtls_ssl_set_timer_t *f_set_timer,
rahul_dahiya	0:fb8047b156bb	5864	mbedtls_ssl_get_timer_t *f_get_timer )
rahul_dahiya	0:fb8047b156bb	5865	{
rahul_dahiya	0:fb8047b156bb	5866	ssl->p_timer = p_timer;
rahul_dahiya	0:fb8047b156bb	5867	ssl->f_set_timer = f_set_timer;
rahul_dahiya	0:fb8047b156bb	5868	ssl->f_get_timer = f_get_timer;
rahul_dahiya	0:fb8047b156bb	5869
rahul_dahiya	0:fb8047b156bb	5870	/* Make sure we start with no timer running */
rahul_dahiya	0:fb8047b156bb	5871	ssl_set_timer( ssl, 0 );
rahul_dahiya	0:fb8047b156bb	5872	}
rahul_dahiya	0:fb8047b156bb	5873
rahul_dahiya	0:fb8047b156bb	5874	#if defined(MBEDTLS_SSL_SRV_C)
rahul_dahiya	0:fb8047b156bb	5875	void mbedtls_ssl_conf_session_cache( mbedtls_ssl_config *conf,
rahul_dahiya	0:fb8047b156bb	5876	void *p_cache,
rahul_dahiya	0:fb8047b156bb	5877	int (f_get_cache)(void , mbedtls_ssl_session *),
rahul_dahiya	0:fb8047b156bb	5878	int (f_set_cache)(void , const mbedtls_ssl_session *) )
rahul_dahiya	0:fb8047b156bb	5879	{
rahul_dahiya	0:fb8047b156bb	5880	conf->p_cache = p_cache;
rahul_dahiya	0:fb8047b156bb	5881	conf->f_get_cache = f_get_cache;
rahul_dahiya	0:fb8047b156bb	5882	conf->f_set_cache = f_set_cache;
rahul_dahiya	0:fb8047b156bb	5883	}
rahul_dahiya	0:fb8047b156bb	5884	#endif /* MBEDTLS_SSL_SRV_C */
rahul_dahiya	0:fb8047b156bb	5885
rahul_dahiya	0:fb8047b156bb	5886	#if defined(MBEDTLS_SSL_CLI_C)
rahul_dahiya	0:fb8047b156bb	5887	int mbedtls_ssl_set_session( mbedtls_ssl_context ssl, const mbedtls_ssl_session session )
rahul_dahiya	0:fb8047b156bb	5888	{
rahul_dahiya	0:fb8047b156bb	5889	int ret;
rahul_dahiya	0:fb8047b156bb	5890
rahul_dahiya	0:fb8047b156bb	5891	if( ssl == NULL \|\|
rahul_dahiya	0:fb8047b156bb	5892	session == NULL \|\|
rahul_dahiya	0:fb8047b156bb	5893	ssl->session_negotiate == NULL \|\|
rahul_dahiya	0:fb8047b156bb	5894	ssl->conf->endpoint != MBEDTLS_SSL_IS_CLIENT )
rahul_dahiya	0:fb8047b156bb	5895	{
rahul_dahiya	0:fb8047b156bb	5896	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
rahul_dahiya	0:fb8047b156bb	5897	}
rahul_dahiya	0:fb8047b156bb	5898
rahul_dahiya	0:fb8047b156bb	5899	if( ( ret = ssl_session_copy( ssl->session_negotiate, session ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	5900	return( ret );
rahul_dahiya	0:fb8047b156bb	5901
rahul_dahiya	0:fb8047b156bb	5902	ssl->handshake->resume = 1;
rahul_dahiya	0:fb8047b156bb	5903
rahul_dahiya	0:fb8047b156bb	5904	return( 0 );
rahul_dahiya	0:fb8047b156bb	5905	}
rahul_dahiya	0:fb8047b156bb	5906	#endif /* MBEDTLS_SSL_CLI_C */
rahul_dahiya	0:fb8047b156bb	5907
rahul_dahiya	0:fb8047b156bb	5908	void mbedtls_ssl_conf_ciphersuites( mbedtls_ssl_config *conf,
rahul_dahiya	0:fb8047b156bb	5909	const int *ciphersuites )
rahul_dahiya	0:fb8047b156bb	5910	{
rahul_dahiya	0:fb8047b156bb	5911	conf->ciphersuite_list[MBEDTLS_SSL_MINOR_VERSION_0] = ciphersuites;
rahul_dahiya	0:fb8047b156bb	5912	conf->ciphersuite_list[MBEDTLS_SSL_MINOR_VERSION_1] = ciphersuites;
rahul_dahiya	0:fb8047b156bb	5913	conf->ciphersuite_list[MBEDTLS_SSL_MINOR_VERSION_2] = ciphersuites;
rahul_dahiya	0:fb8047b156bb	5914	conf->ciphersuite_list[MBEDTLS_SSL_MINOR_VERSION_3] = ciphersuites;
rahul_dahiya	0:fb8047b156bb	5915	}
rahul_dahiya	0:fb8047b156bb	5916
rahul_dahiya	0:fb8047b156bb	5917	void mbedtls_ssl_conf_ciphersuites_for_version( mbedtls_ssl_config *conf,
rahul_dahiya	0:fb8047b156bb	5918	const int *ciphersuites,
rahul_dahiya	0:fb8047b156bb	5919	int major, int minor )
rahul_dahiya	0:fb8047b156bb	5920	{
rahul_dahiya	0:fb8047b156bb	5921	if( major != MBEDTLS_SSL_MAJOR_VERSION_3 )
rahul_dahiya	0:fb8047b156bb	5922	return;
rahul_dahiya	0:fb8047b156bb	5923
rahul_dahiya	0:fb8047b156bb	5924	if( minor < MBEDTLS_SSL_MINOR_VERSION_0 \|\| minor > MBEDTLS_SSL_MINOR_VERSION_3 )
rahul_dahiya	0:fb8047b156bb	5925	return;
rahul_dahiya	0:fb8047b156bb	5926
rahul_dahiya	0:fb8047b156bb	5927	conf->ciphersuite_list[minor] = ciphersuites;
rahul_dahiya	0:fb8047b156bb	5928	}
rahul_dahiya	0:fb8047b156bb	5929
rahul_dahiya	0:fb8047b156bb	5930	#if defined(MBEDTLS_X509_CRT_PARSE_C)
rahul_dahiya	0:fb8047b156bb	5931	void mbedtls_ssl_conf_cert_profile( mbedtls_ssl_config *conf,
rahul_dahiya	0:fb8047b156bb	5932	const mbedtls_x509_crt_profile *profile )
rahul_dahiya	0:fb8047b156bb	5933	{
rahul_dahiya	0:fb8047b156bb	5934	conf->cert_profile = profile;
rahul_dahiya	0:fb8047b156bb	5935	}
rahul_dahiya	0:fb8047b156bb	5936
rahul_dahiya	0:fb8047b156bb	5937	/* Append a new keycert entry to a (possibly empty) list */
rahul_dahiya	0:fb8047b156bb	5938	static int ssl_append_key_cert( mbedtls_ssl_key_cert **head,
rahul_dahiya	0:fb8047b156bb	5939	mbedtls_x509_crt *cert,
rahul_dahiya	0:fb8047b156bb	5940	mbedtls_pk_context *key )
rahul_dahiya	0:fb8047b156bb	5941	{
rahul_dahiya	0:fb8047b156bb	5942	mbedtls_ssl_key_cert *new;
rahul_dahiya	0:fb8047b156bb	5943
rahul_dahiya	0:fb8047b156bb	5944	new = mbedtls_calloc( 1, sizeof( mbedtls_ssl_key_cert ) );
rahul_dahiya	0:fb8047b156bb	5945	if( new == NULL )
rahul_dahiya	0:fb8047b156bb	5946	return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
rahul_dahiya	0:fb8047b156bb	5947
rahul_dahiya	0:fb8047b156bb	5948	new->cert = cert;
rahul_dahiya	0:fb8047b156bb	5949	new->key = key;
rahul_dahiya	0:fb8047b156bb	5950	new->next = NULL;
rahul_dahiya	0:fb8047b156bb	5951
rahul_dahiya	0:fb8047b156bb	5952	/* Update head is the list was null, else add to the end */
rahul_dahiya	0:fb8047b156bb	5953	if( *head == NULL )
rahul_dahiya	0:fb8047b156bb	5954	{
rahul_dahiya	0:fb8047b156bb	5955	*head = new;
rahul_dahiya	0:fb8047b156bb	5956	}
rahul_dahiya	0:fb8047b156bb	5957	else
rahul_dahiya	0:fb8047b156bb	5958	{
rahul_dahiya	0:fb8047b156bb	5959	mbedtls_ssl_key_cert cur = head;
rahul_dahiya	0:fb8047b156bb	5960	while( cur->next != NULL )
rahul_dahiya	0:fb8047b156bb	5961	cur = cur->next;
rahul_dahiya	0:fb8047b156bb	5962	cur->next = new;
rahul_dahiya	0:fb8047b156bb	5963	}
rahul_dahiya	0:fb8047b156bb	5964
rahul_dahiya	0:fb8047b156bb	5965	return( 0 );
rahul_dahiya	0:fb8047b156bb	5966	}
rahul_dahiya	0:fb8047b156bb	5967
rahul_dahiya	0:fb8047b156bb	5968	int mbedtls_ssl_conf_own_cert( mbedtls_ssl_config *conf,
rahul_dahiya	0:fb8047b156bb	5969	mbedtls_x509_crt *own_cert,
rahul_dahiya	0:fb8047b156bb	5970	mbedtls_pk_context *pk_key )
rahul_dahiya	0:fb8047b156bb	5971	{
rahul_dahiya	0:fb8047b156bb	5972	return( ssl_append_key_cert( &conf->key_cert, own_cert, pk_key ) );
rahul_dahiya	0:fb8047b156bb	5973	}
rahul_dahiya	0:fb8047b156bb	5974
rahul_dahiya	0:fb8047b156bb	5975	void mbedtls_ssl_conf_ca_chain( mbedtls_ssl_config *conf,
rahul_dahiya	0:fb8047b156bb	5976	mbedtls_x509_crt *ca_chain,
rahul_dahiya	0:fb8047b156bb	5977	mbedtls_x509_crl *ca_crl )
rahul_dahiya	0:fb8047b156bb	5978	{
rahul_dahiya	0:fb8047b156bb	5979	conf->ca_chain = ca_chain;
rahul_dahiya	0:fb8047b156bb	5980	conf->ca_crl = ca_crl;
rahul_dahiya	0:fb8047b156bb	5981	}
rahul_dahiya	0:fb8047b156bb	5982	#endif /* MBEDTLS_X509_CRT_PARSE_C */
rahul_dahiya	0:fb8047b156bb	5983
rahul_dahiya	0:fb8047b156bb	5984	#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
rahul_dahiya	0:fb8047b156bb	5985	int mbedtls_ssl_set_hs_own_cert( mbedtls_ssl_context *ssl,
rahul_dahiya	0:fb8047b156bb	5986	mbedtls_x509_crt *own_cert,
rahul_dahiya	0:fb8047b156bb	5987	mbedtls_pk_context *pk_key )
rahul_dahiya	0:fb8047b156bb	5988	{
rahul_dahiya	0:fb8047b156bb	5989	return( ssl_append_key_cert( &ssl->handshake->sni_key_cert,
rahul_dahiya	0:fb8047b156bb	5990	own_cert, pk_key ) );
rahul_dahiya	0:fb8047b156bb	5991	}
rahul_dahiya	0:fb8047b156bb	5992
rahul_dahiya	0:fb8047b156bb	5993	void mbedtls_ssl_set_hs_ca_chain( mbedtls_ssl_context *ssl,
rahul_dahiya	0:fb8047b156bb	5994	mbedtls_x509_crt *ca_chain,
rahul_dahiya	0:fb8047b156bb	5995	mbedtls_x509_crl *ca_crl )
rahul_dahiya	0:fb8047b156bb	5996	{
rahul_dahiya	0:fb8047b156bb	5997	ssl->handshake->sni_ca_chain = ca_chain;
rahul_dahiya	0:fb8047b156bb	5998	ssl->handshake->sni_ca_crl = ca_crl;
rahul_dahiya	0:fb8047b156bb	5999	}
rahul_dahiya	0:fb8047b156bb	6000
rahul_dahiya	0:fb8047b156bb	6001	void mbedtls_ssl_set_hs_authmode( mbedtls_ssl_context *ssl,
rahul_dahiya	0:fb8047b156bb	6002	int authmode )
rahul_dahiya	0:fb8047b156bb	6003	{
rahul_dahiya	0:fb8047b156bb	6004	ssl->handshake->sni_authmode = authmode;
rahul_dahiya	0:fb8047b156bb	6005	}
rahul_dahiya	0:fb8047b156bb	6006	#endif /* MBEDTLS_SSL_SERVER_NAME_INDICATION */
rahul_dahiya	0:fb8047b156bb	6007
rahul_dahiya	0:fb8047b156bb	6008	#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
rahul_dahiya	0:fb8047b156bb	6009	/*
rahul_dahiya	0:fb8047b156bb	6010	* Set EC J-PAKE password for current handshake
rahul_dahiya	0:fb8047b156bb	6011	*/
rahul_dahiya	0:fb8047b156bb	6012	int mbedtls_ssl_set_hs_ecjpake_password( mbedtls_ssl_context *ssl,
rahul_dahiya	0:fb8047b156bb	6013	const unsigned char *pw,
rahul_dahiya	0:fb8047b156bb	6014	size_t pw_len )
rahul_dahiya	0:fb8047b156bb	6015	{
rahul_dahiya	0:fb8047b156bb	6016	mbedtls_ecjpake_role role;
rahul_dahiya	0:fb8047b156bb	6017
rahul_dahiya	0:fb8047b156bb	6018	if( ssl->handshake == NULL \|\| ssl->conf == NULL )
rahul_dahiya	0:fb8047b156bb	6019	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
rahul_dahiya	0:fb8047b156bb	6020
rahul_dahiya	0:fb8047b156bb	6021	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER )
rahul_dahiya	0:fb8047b156bb	6022	role = MBEDTLS_ECJPAKE_SERVER;
rahul_dahiya	0:fb8047b156bb	6023	else
rahul_dahiya	0:fb8047b156bb	6024	role = MBEDTLS_ECJPAKE_CLIENT;
rahul_dahiya	0:fb8047b156bb	6025
rahul_dahiya	0:fb8047b156bb	6026	return( mbedtls_ecjpake_setup( &ssl->handshake->ecjpake_ctx,
rahul_dahiya	0:fb8047b156bb	6027	role,
rahul_dahiya	0:fb8047b156bb	6028	MBEDTLS_MD_SHA256,
rahul_dahiya	0:fb8047b156bb	6029	MBEDTLS_ECP_DP_SECP256R1,
rahul_dahiya	0:fb8047b156bb	6030	pw, pw_len ) );
rahul_dahiya	0:fb8047b156bb	6031	}
rahul_dahiya	0:fb8047b156bb	6032	#endif /* MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED */
rahul_dahiya	0:fb8047b156bb	6033
rahul_dahiya	0:fb8047b156bb	6034	#if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
rahul_dahiya	0:fb8047b156bb	6035	int mbedtls_ssl_conf_psk( mbedtls_ssl_config *conf,
rahul_dahiya	0:fb8047b156bb	6036	const unsigned char *psk, size_t psk_len,
rahul_dahiya	0:fb8047b156bb	6037	const unsigned char *psk_identity, size_t psk_identity_len )
rahul_dahiya	0:fb8047b156bb	6038	{
rahul_dahiya	0:fb8047b156bb	6039	if( psk == NULL \|\| psk_identity == NULL )
rahul_dahiya	0:fb8047b156bb	6040	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
rahul_dahiya	0:fb8047b156bb	6041
rahul_dahiya	0:fb8047b156bb	6042	if( psk_len > MBEDTLS_PSK_MAX_LEN )
rahul_dahiya	0:fb8047b156bb	6043	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
rahul_dahiya	0:fb8047b156bb	6044
rahul_dahiya	0:fb8047b156bb	6045	/* Identity len will be encoded on two bytes */
rahul_dahiya	0:fb8047b156bb	6046	if( ( psk_identity_len >> 16 ) != 0 \|\|
rahul_dahiya	0:fb8047b156bb	6047	psk_identity_len > MBEDTLS_SSL_MAX_CONTENT_LEN )
rahul_dahiya	0:fb8047b156bb	6048	{
rahul_dahiya	0:fb8047b156bb	6049	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
rahul_dahiya	0:fb8047b156bb	6050	}
rahul_dahiya	0:fb8047b156bb	6051
rahul_dahiya	0:fb8047b156bb	6052	if( conf->psk != NULL \|\| conf->psk_identity != NULL )
rahul_dahiya	0:fb8047b156bb	6053	{
rahul_dahiya	0:fb8047b156bb	6054	mbedtls_free( conf->psk );
rahul_dahiya	0:fb8047b156bb	6055	mbedtls_free( conf->psk_identity );
rahul_dahiya	0:fb8047b156bb	6056	conf->psk = NULL;
rahul_dahiya	0:fb8047b156bb	6057	conf->psk_identity = NULL;
rahul_dahiya	0:fb8047b156bb	6058	}
rahul_dahiya	0:fb8047b156bb	6059
rahul_dahiya	0:fb8047b156bb	6060	if( ( conf->psk = mbedtls_calloc( 1, psk_len ) ) == NULL \|\|
rahul_dahiya	0:fb8047b156bb	6061	( conf->psk_identity = mbedtls_calloc( 1, psk_identity_len ) ) == NULL )
rahul_dahiya	0:fb8047b156bb	6062	{
rahul_dahiya	0:fb8047b156bb	6063	mbedtls_free( conf->psk );
rahul_dahiya	0:fb8047b156bb	6064	mbedtls_free( conf->psk_identity );
rahul_dahiya	0:fb8047b156bb	6065	conf->psk = NULL;
rahul_dahiya	0:fb8047b156bb	6066	conf->psk_identity = NULL;
rahul_dahiya	0:fb8047b156bb	6067	return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
rahul_dahiya	0:fb8047b156bb	6068	}
rahul_dahiya	0:fb8047b156bb	6069
rahul_dahiya	0:fb8047b156bb	6070	conf->psk_len = psk_len;
rahul_dahiya	0:fb8047b156bb	6071	conf->psk_identity_len = psk_identity_len;
rahul_dahiya	0:fb8047b156bb	6072
rahul_dahiya	0:fb8047b156bb	6073	memcpy( conf->psk, psk, conf->psk_len );
rahul_dahiya	0:fb8047b156bb	6074	memcpy( conf->psk_identity, psk_identity, conf->psk_identity_len );
rahul_dahiya	0:fb8047b156bb	6075
rahul_dahiya	0:fb8047b156bb	6076	return( 0 );
rahul_dahiya	0:fb8047b156bb	6077	}
rahul_dahiya	0:fb8047b156bb	6078
rahul_dahiya	0:fb8047b156bb	6079	int mbedtls_ssl_set_hs_psk( mbedtls_ssl_context *ssl,
rahul_dahiya	0:fb8047b156bb	6080	const unsigned char *psk, size_t psk_len )
rahul_dahiya	0:fb8047b156bb	6081	{
rahul_dahiya	0:fb8047b156bb	6082	if( psk == NULL \|\| ssl->handshake == NULL )
rahul_dahiya	0:fb8047b156bb	6083	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
rahul_dahiya	0:fb8047b156bb	6084
rahul_dahiya	0:fb8047b156bb	6085	if( psk_len > MBEDTLS_PSK_MAX_LEN )
rahul_dahiya	0:fb8047b156bb	6086	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
rahul_dahiya	0:fb8047b156bb	6087
rahul_dahiya	0:fb8047b156bb	6088	if( ssl->handshake->psk != NULL )
rahul_dahiya	0:fb8047b156bb	6089	mbedtls_free( ssl->handshake->psk );
rahul_dahiya	0:fb8047b156bb	6090
rahul_dahiya	0:fb8047b156bb	6091	if( ( ssl->handshake->psk = mbedtls_calloc( 1, psk_len ) ) == NULL )
rahul_dahiya	0:fb8047b156bb	6092	return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
rahul_dahiya	0:fb8047b156bb	6093
rahul_dahiya	0:fb8047b156bb	6094	ssl->handshake->psk_len = psk_len;
rahul_dahiya	0:fb8047b156bb	6095	memcpy( ssl->handshake->psk, psk, ssl->handshake->psk_len );
rahul_dahiya	0:fb8047b156bb	6096
rahul_dahiya	0:fb8047b156bb	6097	return( 0 );
rahul_dahiya	0:fb8047b156bb	6098	}
rahul_dahiya	0:fb8047b156bb	6099
rahul_dahiya	0:fb8047b156bb	6100	void mbedtls_ssl_conf_psk_cb( mbedtls_ssl_config *conf,
rahul_dahiya	0:fb8047b156bb	6101	int (f_psk)(void , mbedtls_ssl_context , const unsigned char ,
rahul_dahiya	0:fb8047b156bb	6102	size_t),
rahul_dahiya	0:fb8047b156bb	6103	void *p_psk )
rahul_dahiya	0:fb8047b156bb	6104	{
rahul_dahiya	0:fb8047b156bb	6105	conf->f_psk = f_psk;
rahul_dahiya	0:fb8047b156bb	6106	conf->p_psk = p_psk;
rahul_dahiya	0:fb8047b156bb	6107	}
rahul_dahiya	0:fb8047b156bb	6108	#endif /* MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED */
rahul_dahiya	0:fb8047b156bb	6109
rahul_dahiya	0:fb8047b156bb	6110	#if defined(MBEDTLS_DHM_C) && defined(MBEDTLS_SSL_SRV_C)
rahul_dahiya	0:fb8047b156bb	6111	int mbedtls_ssl_conf_dh_param( mbedtls_ssl_config conf, const char dhm_P, const char *dhm_G )
rahul_dahiya	0:fb8047b156bb	6112	{
rahul_dahiya	0:fb8047b156bb	6113	int ret;
rahul_dahiya	0:fb8047b156bb	6114
rahul_dahiya	0:fb8047b156bb	6115	if( ( ret = mbedtls_mpi_read_string( &conf->dhm_P, 16, dhm_P ) ) != 0 \|\|
rahul_dahiya	0:fb8047b156bb	6116	( ret = mbedtls_mpi_read_string( &conf->dhm_G, 16, dhm_G ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	6117	{
rahul_dahiya	0:fb8047b156bb	6118	mbedtls_mpi_free( &conf->dhm_P );
rahul_dahiya	0:fb8047b156bb	6119	mbedtls_mpi_free( &conf->dhm_G );
rahul_dahiya	0:fb8047b156bb	6120	return( ret );
rahul_dahiya	0:fb8047b156bb	6121	}
rahul_dahiya	0:fb8047b156bb	6122
rahul_dahiya	0:fb8047b156bb	6123	return( 0 );
rahul_dahiya	0:fb8047b156bb	6124	}
rahul_dahiya	0:fb8047b156bb	6125
rahul_dahiya	0:fb8047b156bb	6126	int mbedtls_ssl_conf_dh_param_ctx( mbedtls_ssl_config conf, mbedtls_dhm_context dhm_ctx )
rahul_dahiya	0:fb8047b156bb	6127	{
rahul_dahiya	0:fb8047b156bb	6128	int ret;
rahul_dahiya	0:fb8047b156bb	6129
rahul_dahiya	0:fb8047b156bb	6130	if( ( ret = mbedtls_mpi_copy( &conf->dhm_P, &dhm_ctx->P ) ) != 0 \|\|
rahul_dahiya	0:fb8047b156bb	6131	( ret = mbedtls_mpi_copy( &conf->dhm_G, &dhm_ctx->G ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	6132	{
rahul_dahiya	0:fb8047b156bb	6133	mbedtls_mpi_free( &conf->dhm_P );
rahul_dahiya	0:fb8047b156bb	6134	mbedtls_mpi_free( &conf->dhm_G );
rahul_dahiya	0:fb8047b156bb	6135	return( ret );
rahul_dahiya	0:fb8047b156bb	6136	}
rahul_dahiya	0:fb8047b156bb	6137
rahul_dahiya	0:fb8047b156bb	6138	return( 0 );
rahul_dahiya	0:fb8047b156bb	6139	}
rahul_dahiya	0:fb8047b156bb	6140	#endif /* MBEDTLS_DHM_C && MBEDTLS_SSL_SRV_C */
rahul_dahiya	0:fb8047b156bb	6141
rahul_dahiya	0:fb8047b156bb	6142	#if defined(MBEDTLS_DHM_C) && defined(MBEDTLS_SSL_CLI_C)
rahul_dahiya	0:fb8047b156bb	6143	/*
rahul_dahiya	0:fb8047b156bb	6144	* Set the minimum length for Diffie-Hellman parameters
rahul_dahiya	0:fb8047b156bb	6145	*/
rahul_dahiya	0:fb8047b156bb	6146	void mbedtls_ssl_conf_dhm_min_bitlen( mbedtls_ssl_config *conf,
rahul_dahiya	0:fb8047b156bb	6147	unsigned int bitlen )
rahul_dahiya	0:fb8047b156bb	6148	{
rahul_dahiya	0:fb8047b156bb	6149	conf->dhm_min_bitlen = bitlen;
rahul_dahiya	0:fb8047b156bb	6150	}
rahul_dahiya	0:fb8047b156bb	6151	#endif /* MBEDTLS_DHM_C && MBEDTLS_SSL_CLI_C */
rahul_dahiya	0:fb8047b156bb	6152
rahul_dahiya	0:fb8047b156bb	6153	#if defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
rahul_dahiya	0:fb8047b156bb	6154	/*
rahul_dahiya	0:fb8047b156bb	6155	* Set allowed/preferred hashes for handshake signatures
rahul_dahiya	0:fb8047b156bb	6156	*/
rahul_dahiya	0:fb8047b156bb	6157	void mbedtls_ssl_conf_sig_hashes( mbedtls_ssl_config *conf,
rahul_dahiya	0:fb8047b156bb	6158	const int *hashes )
rahul_dahiya	0:fb8047b156bb	6159	{
rahul_dahiya	0:fb8047b156bb	6160	conf->sig_hashes = hashes;
rahul_dahiya	0:fb8047b156bb	6161	}
rahul_dahiya	0:fb8047b156bb	6162	#endif
rahul_dahiya	0:fb8047b156bb	6163
rahul_dahiya	0:fb8047b156bb	6164	#if defined(MBEDTLS_ECP_C)
rahul_dahiya	0:fb8047b156bb	6165	/*
rahul_dahiya	0:fb8047b156bb	6166	* Set the allowed elliptic curves
rahul_dahiya	0:fb8047b156bb	6167	*/
rahul_dahiya	0:fb8047b156bb	6168	void mbedtls_ssl_conf_curves( mbedtls_ssl_config *conf,
rahul_dahiya	0:fb8047b156bb	6169	const mbedtls_ecp_group_id *curve_list )
rahul_dahiya	0:fb8047b156bb	6170	{
rahul_dahiya	0:fb8047b156bb	6171	conf->curve_list = curve_list;
rahul_dahiya	0:fb8047b156bb	6172	}
rahul_dahiya	0:fb8047b156bb	6173	#endif
rahul_dahiya	0:fb8047b156bb	6174
rahul_dahiya	0:fb8047b156bb	6175	#if defined(MBEDTLS_X509_CRT_PARSE_C)
rahul_dahiya	0:fb8047b156bb	6176	int mbedtls_ssl_set_hostname( mbedtls_ssl_context ssl, const char hostname )
rahul_dahiya	0:fb8047b156bb	6177	{
rahul_dahiya	0:fb8047b156bb	6178	size_t hostname_len;
rahul_dahiya	0:fb8047b156bb	6179
rahul_dahiya	0:fb8047b156bb	6180	if( hostname == NULL )
rahul_dahiya	0:fb8047b156bb	6181	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
rahul_dahiya	0:fb8047b156bb	6182
rahul_dahiya	0:fb8047b156bb	6183	hostname_len = strlen( hostname );
rahul_dahiya	0:fb8047b156bb	6184
rahul_dahiya	0:fb8047b156bb	6185	if( hostname_len + 1 == 0 )
rahul_dahiya	0:fb8047b156bb	6186	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
rahul_dahiya	0:fb8047b156bb	6187
rahul_dahiya	0:fb8047b156bb	6188	if( hostname_len > MBEDTLS_SSL_MAX_HOST_NAME_LEN )
rahul_dahiya	0:fb8047b156bb	6189	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
rahul_dahiya	0:fb8047b156bb	6190
rahul_dahiya	0:fb8047b156bb	6191	ssl->hostname = mbedtls_calloc( 1, hostname_len + 1 );
rahul_dahiya	0:fb8047b156bb	6192
rahul_dahiya	0:fb8047b156bb	6193	if( ssl->hostname == NULL )
rahul_dahiya	0:fb8047b156bb	6194	return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
rahul_dahiya	0:fb8047b156bb	6195
rahul_dahiya	0:fb8047b156bb	6196	memcpy( ssl->hostname, hostname, hostname_len );
rahul_dahiya	0:fb8047b156bb	6197
rahul_dahiya	0:fb8047b156bb	6198	ssl->hostname[hostname_len] = '\0';
rahul_dahiya	0:fb8047b156bb	6199
rahul_dahiya	0:fb8047b156bb	6200	return( 0 );
rahul_dahiya	0:fb8047b156bb	6201	}
rahul_dahiya	0:fb8047b156bb	6202	#endif
rahul_dahiya	0:fb8047b156bb	6203
rahul_dahiya	0:fb8047b156bb	6204	#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
rahul_dahiya	0:fb8047b156bb	6205	void mbedtls_ssl_conf_sni( mbedtls_ssl_config *conf,
rahul_dahiya	0:fb8047b156bb	6206	int (f_sni)(void , mbedtls_ssl_context *,
rahul_dahiya	0:fb8047b156bb	6207	const unsigned char *, size_t),
rahul_dahiya	0:fb8047b156bb	6208	void *p_sni )
rahul_dahiya	0:fb8047b156bb	6209	{
rahul_dahiya	0:fb8047b156bb	6210	conf->f_sni = f_sni;
rahul_dahiya	0:fb8047b156bb	6211	conf->p_sni = p_sni;
rahul_dahiya	0:fb8047b156bb	6212	}
rahul_dahiya	0:fb8047b156bb	6213	#endif /* MBEDTLS_SSL_SERVER_NAME_INDICATION */
rahul_dahiya	0:fb8047b156bb	6214
rahul_dahiya	0:fb8047b156bb	6215	#if defined(MBEDTLS_SSL_ALPN)
rahul_dahiya	0:fb8047b156bb	6216	int mbedtls_ssl_conf_alpn_protocols( mbedtls_ssl_config conf, const char *protos )
rahul_dahiya	0:fb8047b156bb	6217	{
rahul_dahiya	0:fb8047b156bb	6218	size_t cur_len, tot_len;
rahul_dahiya	0:fb8047b156bb	6219	const char **p;
rahul_dahiya	0:fb8047b156bb	6220
rahul_dahiya	0:fb8047b156bb	6221	/*
rahul_dahiya	0:fb8047b156bb	6222	* RFC 7301 3.1: "Empty strings MUST NOT be included and byte strings
rahul_dahiya	0:fb8047b156bb	6223	* MUST NOT be truncated."
rahul_dahiya	0:fb8047b156bb	6224	* We check lengths now rather than later.
rahul_dahiya	0:fb8047b156bb	6225	*/
rahul_dahiya	0:fb8047b156bb	6226	tot_len = 0;
rahul_dahiya	0:fb8047b156bb	6227	for( p = protos; *p != NULL; p++ )
rahul_dahiya	0:fb8047b156bb	6228	{
rahul_dahiya	0:fb8047b156bb	6229	cur_len = strlen( *p );
rahul_dahiya	0:fb8047b156bb	6230	tot_len += cur_len;
rahul_dahiya	0:fb8047b156bb	6231
rahul_dahiya	0:fb8047b156bb	6232	if( cur_len == 0 \|\| cur_len > 255 \|\| tot_len > 65535 )
rahul_dahiya	0:fb8047b156bb	6233	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
rahul_dahiya	0:fb8047b156bb	6234	}
rahul_dahiya	0:fb8047b156bb	6235
rahul_dahiya	0:fb8047b156bb	6236	conf->alpn_list = protos;
rahul_dahiya	0:fb8047b156bb	6237
rahul_dahiya	0:fb8047b156bb	6238	return( 0 );
rahul_dahiya	0:fb8047b156bb	6239	}
rahul_dahiya	0:fb8047b156bb	6240
rahul_dahiya	0:fb8047b156bb	6241	const char mbedtls_ssl_get_alpn_protocol( const mbedtls_ssl_context ssl )
rahul_dahiya	0:fb8047b156bb	6242	{
rahul_dahiya	0:fb8047b156bb	6243	return( ssl->alpn_chosen );
rahul_dahiya	0:fb8047b156bb	6244	}
rahul_dahiya	0:fb8047b156bb	6245	#endif /* MBEDTLS_SSL_ALPN */
rahul_dahiya	0:fb8047b156bb	6246
rahul_dahiya	0:fb8047b156bb	6247	void mbedtls_ssl_conf_max_version( mbedtls_ssl_config *conf, int major, int minor )
rahul_dahiya	0:fb8047b156bb	6248	{
rahul_dahiya	0:fb8047b156bb	6249	conf->max_major_ver = major;
rahul_dahiya	0:fb8047b156bb	6250	conf->max_minor_ver = minor;
rahul_dahiya	0:fb8047b156bb	6251	}
rahul_dahiya	0:fb8047b156bb	6252
rahul_dahiya	0:fb8047b156bb	6253	void mbedtls_ssl_conf_min_version( mbedtls_ssl_config *conf, int major, int minor )
rahul_dahiya	0:fb8047b156bb	6254	{
rahul_dahiya	0:fb8047b156bb	6255	conf->min_major_ver = major;
rahul_dahiya	0:fb8047b156bb	6256	conf->min_minor_ver = minor;
rahul_dahiya	0:fb8047b156bb	6257	}
rahul_dahiya	0:fb8047b156bb	6258
rahul_dahiya	0:fb8047b156bb	6259	#if defined(MBEDTLS_SSL_FALLBACK_SCSV) && defined(MBEDTLS_SSL_CLI_C)
rahul_dahiya	0:fb8047b156bb	6260	void mbedtls_ssl_conf_fallback( mbedtls_ssl_config *conf, char fallback )
rahul_dahiya	0:fb8047b156bb	6261	{
rahul_dahiya	0:fb8047b156bb	6262	conf->fallback = fallback;
rahul_dahiya	0:fb8047b156bb	6263	}
rahul_dahiya	0:fb8047b156bb	6264	#endif
rahul_dahiya	0:fb8047b156bb	6265
rahul_dahiya	0:fb8047b156bb	6266	#if defined(MBEDTLS_SSL_SRV_C)
rahul_dahiya	0:fb8047b156bb	6267	void mbedtls_ssl_conf_cert_req_ca_list( mbedtls_ssl_config *conf,
rahul_dahiya	0:fb8047b156bb	6268	char cert_req_ca_list )
rahul_dahiya	0:fb8047b156bb	6269	{
rahul_dahiya	0:fb8047b156bb	6270	conf->cert_req_ca_list = cert_req_ca_list;
rahul_dahiya	0:fb8047b156bb	6271	}
rahul_dahiya	0:fb8047b156bb	6272	#endif
rahul_dahiya	0:fb8047b156bb	6273
rahul_dahiya	0:fb8047b156bb	6274	#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
rahul_dahiya	0:fb8047b156bb	6275	void mbedtls_ssl_conf_encrypt_then_mac( mbedtls_ssl_config *conf, char etm )
rahul_dahiya	0:fb8047b156bb	6276	{
rahul_dahiya	0:fb8047b156bb	6277	conf->encrypt_then_mac = etm;
rahul_dahiya	0:fb8047b156bb	6278	}
rahul_dahiya	0:fb8047b156bb	6279	#endif
rahul_dahiya	0:fb8047b156bb	6280
rahul_dahiya	0:fb8047b156bb	6281	#if defined(MBEDTLS_SSL_EXTENDED_MASTER_SECRET)
rahul_dahiya	0:fb8047b156bb	6282	void mbedtls_ssl_conf_extended_master_secret( mbedtls_ssl_config *conf, char ems )
rahul_dahiya	0:fb8047b156bb	6283	{
rahul_dahiya	0:fb8047b156bb	6284	conf->extended_ms = ems;
rahul_dahiya	0:fb8047b156bb	6285	}
rahul_dahiya	0:fb8047b156bb	6286	#endif
rahul_dahiya	0:fb8047b156bb	6287
rahul_dahiya	0:fb8047b156bb	6288	#if defined(MBEDTLS_ARC4_C)
rahul_dahiya	0:fb8047b156bb	6289	void mbedtls_ssl_conf_arc4_support( mbedtls_ssl_config *conf, char arc4 )
rahul_dahiya	0:fb8047b156bb	6290	{
rahul_dahiya	0:fb8047b156bb	6291	conf->arc4_disabled = arc4;
rahul_dahiya	0:fb8047b156bb	6292	}
rahul_dahiya	0:fb8047b156bb	6293	#endif
rahul_dahiya	0:fb8047b156bb	6294
rahul_dahiya	0:fb8047b156bb	6295	#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
rahul_dahiya	0:fb8047b156bb	6296	int mbedtls_ssl_conf_max_frag_len( mbedtls_ssl_config *conf, unsigned char mfl_code )
rahul_dahiya	0:fb8047b156bb	6297	{
rahul_dahiya	0:fb8047b156bb	6298	if( mfl_code >= MBEDTLS_SSL_MAX_FRAG_LEN_INVALID \|\|
rahul_dahiya	0:fb8047b156bb	6299	mfl_code_to_length[mfl_code] > MBEDTLS_SSL_MAX_CONTENT_LEN )
rahul_dahiya	0:fb8047b156bb	6300	{
rahul_dahiya	0:fb8047b156bb	6301	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
rahul_dahiya	0:fb8047b156bb	6302	}
rahul_dahiya	0:fb8047b156bb	6303
rahul_dahiya	0:fb8047b156bb	6304	conf->mfl_code = mfl_code;
rahul_dahiya	0:fb8047b156bb	6305
rahul_dahiya	0:fb8047b156bb	6306	return( 0 );
rahul_dahiya	0:fb8047b156bb	6307	}
rahul_dahiya	0:fb8047b156bb	6308	#endif /* MBEDTLS_SSL_MAX_FRAGMENT_LENGTH */
rahul_dahiya	0:fb8047b156bb	6309
rahul_dahiya	0:fb8047b156bb	6310	#if defined(MBEDTLS_SSL_TRUNCATED_HMAC)
rahul_dahiya	0:fb8047b156bb	6311	void mbedtls_ssl_conf_truncated_hmac( mbedtls_ssl_config *conf, int truncate )
rahul_dahiya	0:fb8047b156bb	6312	{
rahul_dahiya	0:fb8047b156bb	6313	conf->trunc_hmac = truncate;
rahul_dahiya	0:fb8047b156bb	6314	}
rahul_dahiya	0:fb8047b156bb	6315	#endif /* MBEDTLS_SSL_TRUNCATED_HMAC */
rahul_dahiya	0:fb8047b156bb	6316
rahul_dahiya	0:fb8047b156bb	6317	#if defined(MBEDTLS_SSL_CBC_RECORD_SPLITTING)
rahul_dahiya	0:fb8047b156bb	6318	void mbedtls_ssl_conf_cbc_record_splitting( mbedtls_ssl_config *conf, char split )
rahul_dahiya	0:fb8047b156bb	6319	{
rahul_dahiya	0:fb8047b156bb	6320	conf->cbc_record_splitting = split;
rahul_dahiya	0:fb8047b156bb	6321	}
rahul_dahiya	0:fb8047b156bb	6322	#endif
rahul_dahiya	0:fb8047b156bb	6323
rahul_dahiya	0:fb8047b156bb	6324	void mbedtls_ssl_conf_legacy_renegotiation( mbedtls_ssl_config *conf, int allow_legacy )
rahul_dahiya	0:fb8047b156bb	6325	{
rahul_dahiya	0:fb8047b156bb	6326	conf->allow_legacy_renegotiation = allow_legacy;
rahul_dahiya	0:fb8047b156bb	6327	}
rahul_dahiya	0:fb8047b156bb	6328
rahul_dahiya	0:fb8047b156bb	6329	#if defined(MBEDTLS_SSL_RENEGOTIATION)
rahul_dahiya	0:fb8047b156bb	6330	void mbedtls_ssl_conf_renegotiation( mbedtls_ssl_config *conf, int renegotiation )
rahul_dahiya	0:fb8047b156bb	6331	{
rahul_dahiya	0:fb8047b156bb	6332	conf->disable_renegotiation = renegotiation;
rahul_dahiya	0:fb8047b156bb	6333	}
rahul_dahiya	0:fb8047b156bb	6334
rahul_dahiya	0:fb8047b156bb	6335	void mbedtls_ssl_conf_renegotiation_enforced( mbedtls_ssl_config *conf, int max_records )
rahul_dahiya	0:fb8047b156bb	6336	{
rahul_dahiya	0:fb8047b156bb	6337	conf->renego_max_records = max_records;
rahul_dahiya	0:fb8047b156bb	6338	}
rahul_dahiya	0:fb8047b156bb	6339
rahul_dahiya	0:fb8047b156bb	6340	void mbedtls_ssl_conf_renegotiation_period( mbedtls_ssl_config *conf,
rahul_dahiya	0:fb8047b156bb	6341	const unsigned char period[8] )
rahul_dahiya	0:fb8047b156bb	6342	{
rahul_dahiya	0:fb8047b156bb	6343	memcpy( conf->renego_period, period, 8 );
rahul_dahiya	0:fb8047b156bb	6344	}
rahul_dahiya	0:fb8047b156bb	6345	#endif /* MBEDTLS_SSL_RENEGOTIATION */
rahul_dahiya	0:fb8047b156bb	6346
rahul_dahiya	0:fb8047b156bb	6347	#if defined(MBEDTLS_SSL_SESSION_TICKETS)
rahul_dahiya	0:fb8047b156bb	6348	#if defined(MBEDTLS_SSL_CLI_C)
rahul_dahiya	0:fb8047b156bb	6349	void mbedtls_ssl_conf_session_tickets( mbedtls_ssl_config *conf, int use_tickets )
rahul_dahiya	0:fb8047b156bb	6350	{
rahul_dahiya	0:fb8047b156bb	6351	conf->session_tickets = use_tickets;
rahul_dahiya	0:fb8047b156bb	6352	}
rahul_dahiya	0:fb8047b156bb	6353	#endif
rahul_dahiya	0:fb8047b156bb	6354
rahul_dahiya	0:fb8047b156bb	6355	#if defined(MBEDTLS_SSL_SRV_C)
rahul_dahiya	0:fb8047b156bb	6356	void mbedtls_ssl_conf_session_tickets_cb( mbedtls_ssl_config *conf,
rahul_dahiya	0:fb8047b156bb	6357	mbedtls_ssl_ticket_write_t *f_ticket_write,
rahul_dahiya	0:fb8047b156bb	6358	mbedtls_ssl_ticket_parse_t *f_ticket_parse,
rahul_dahiya	0:fb8047b156bb	6359	void *p_ticket )
rahul_dahiya	0:fb8047b156bb	6360	{
rahul_dahiya	0:fb8047b156bb	6361	conf->f_ticket_write = f_ticket_write;
rahul_dahiya	0:fb8047b156bb	6362	conf->f_ticket_parse = f_ticket_parse;
rahul_dahiya	0:fb8047b156bb	6363	conf->p_ticket = p_ticket;
rahul_dahiya	0:fb8047b156bb	6364	}
rahul_dahiya	0:fb8047b156bb	6365	#endif
rahul_dahiya	0:fb8047b156bb	6366	#endif /* MBEDTLS_SSL_SESSION_TICKETS */
rahul_dahiya	0:fb8047b156bb	6367
rahul_dahiya	0:fb8047b156bb	6368	#if defined(MBEDTLS_SSL_EXPORT_KEYS)
rahul_dahiya	0:fb8047b156bb	6369	void mbedtls_ssl_conf_export_keys_cb( mbedtls_ssl_config *conf,
rahul_dahiya	0:fb8047b156bb	6370	mbedtls_ssl_export_keys_t *f_export_keys,
rahul_dahiya	0:fb8047b156bb	6371	void *p_export_keys )
rahul_dahiya	0:fb8047b156bb	6372	{
rahul_dahiya	0:fb8047b156bb	6373	conf->f_export_keys = f_export_keys;
rahul_dahiya	0:fb8047b156bb	6374	conf->p_export_keys = p_export_keys;
rahul_dahiya	0:fb8047b156bb	6375	}
rahul_dahiya	0:fb8047b156bb	6376	#endif
rahul_dahiya	0:fb8047b156bb	6377
rahul_dahiya	0:fb8047b156bb	6378	/*
rahul_dahiya	0:fb8047b156bb	6379	* SSL get accessors
rahul_dahiya	0:fb8047b156bb	6380	*/
rahul_dahiya	0:fb8047b156bb	6381	size_t mbedtls_ssl_get_bytes_avail( const mbedtls_ssl_context *ssl )
rahul_dahiya	0:fb8047b156bb	6382	{
rahul_dahiya	0:fb8047b156bb	6383	return( ssl->in_offt == NULL ? 0 : ssl->in_msglen );
rahul_dahiya	0:fb8047b156bb	6384	}
rahul_dahiya	0:fb8047b156bb	6385
rahul_dahiya	0:fb8047b156bb	6386	uint32_t mbedtls_ssl_get_verify_result( const mbedtls_ssl_context *ssl )
rahul_dahiya	0:fb8047b156bb	6387	{
rahul_dahiya	0:fb8047b156bb	6388	if( ssl->session != NULL )
rahul_dahiya	0:fb8047b156bb	6389	return( ssl->session->verify_result );
rahul_dahiya	0:fb8047b156bb	6390
rahul_dahiya	0:fb8047b156bb	6391	if( ssl->session_negotiate != NULL )
rahul_dahiya	0:fb8047b156bb	6392	return( ssl->session_negotiate->verify_result );
rahul_dahiya	0:fb8047b156bb	6393
rahul_dahiya	0:fb8047b156bb	6394	return( 0xFFFFFFFF );
rahul_dahiya	0:fb8047b156bb	6395	}
rahul_dahiya	0:fb8047b156bb	6396
rahul_dahiya	0:fb8047b156bb	6397	const char mbedtls_ssl_get_ciphersuite( const mbedtls_ssl_context ssl )
rahul_dahiya	0:fb8047b156bb	6398	{
rahul_dahiya	0:fb8047b156bb	6399	if( ssl == NULL \|\| ssl->session == NULL )
rahul_dahiya	0:fb8047b156bb	6400	return( NULL );
rahul_dahiya	0:fb8047b156bb	6401
rahul_dahiya	0:fb8047b156bb	6402	return mbedtls_ssl_get_ciphersuite_name( ssl->session->ciphersuite );
rahul_dahiya	0:fb8047b156bb	6403	}
rahul_dahiya	0:fb8047b156bb	6404
rahul_dahiya	0:fb8047b156bb	6405	const char mbedtls_ssl_get_version( const mbedtls_ssl_context ssl )
rahul_dahiya	0:fb8047b156bb	6406	{
rahul_dahiya	0:fb8047b156bb	6407	#if defined(MBEDTLS_SSL_PROTO_DTLS)
rahul_dahiya	0:fb8047b156bb	6408	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
rahul_dahiya	0:fb8047b156bb	6409	{
rahul_dahiya	0:fb8047b156bb	6410	switch( ssl->minor_ver )
rahul_dahiya	0:fb8047b156bb	6411	{
rahul_dahiya	0:fb8047b156bb	6412	case MBEDTLS_SSL_MINOR_VERSION_2:
rahul_dahiya	0:fb8047b156bb	6413	return( "DTLSv1.0" );
rahul_dahiya	0:fb8047b156bb	6414
rahul_dahiya	0:fb8047b156bb	6415	case MBEDTLS_SSL_MINOR_VERSION_3:
rahul_dahiya	0:fb8047b156bb	6416	return( "DTLSv1.2" );
rahul_dahiya	0:fb8047b156bb	6417
rahul_dahiya	0:fb8047b156bb	6418	default:
rahul_dahiya	0:fb8047b156bb	6419	return( "unknown (DTLS)" );
rahul_dahiya	0:fb8047b156bb	6420	}
rahul_dahiya	0:fb8047b156bb	6421	}
rahul_dahiya	0:fb8047b156bb	6422	#endif
rahul_dahiya	0:fb8047b156bb	6423
rahul_dahiya	0:fb8047b156bb	6424	switch( ssl->minor_ver )
rahul_dahiya	0:fb8047b156bb	6425	{
rahul_dahiya	0:fb8047b156bb	6426	case MBEDTLS_SSL_MINOR_VERSION_0:
rahul_dahiya	0:fb8047b156bb	6427	return( "SSLv3.0" );
rahul_dahiya	0:fb8047b156bb	6428
rahul_dahiya	0:fb8047b156bb	6429	case MBEDTLS_SSL_MINOR_VERSION_1:
rahul_dahiya	0:fb8047b156bb	6430	return( "TLSv1.0" );
rahul_dahiya	0:fb8047b156bb	6431
rahul_dahiya	0:fb8047b156bb	6432	case MBEDTLS_SSL_MINOR_VERSION_2:
rahul_dahiya	0:fb8047b156bb	6433	return( "TLSv1.1" );
rahul_dahiya	0:fb8047b156bb	6434
rahul_dahiya	0:fb8047b156bb	6435	case MBEDTLS_SSL_MINOR_VERSION_3:
rahul_dahiya	0:fb8047b156bb	6436	return( "TLSv1.2" );
rahul_dahiya	0:fb8047b156bb	6437
rahul_dahiya	0:fb8047b156bb	6438	default:
rahul_dahiya	0:fb8047b156bb	6439	return( "unknown" );
rahul_dahiya	0:fb8047b156bb	6440	}
rahul_dahiya	0:fb8047b156bb	6441	}
rahul_dahiya	0:fb8047b156bb	6442
rahul_dahiya	0:fb8047b156bb	6443	int mbedtls_ssl_get_record_expansion( const mbedtls_ssl_context *ssl )
rahul_dahiya	0:fb8047b156bb	6444	{
rahul_dahiya	0:fb8047b156bb	6445	size_t transform_expansion;
rahul_dahiya	0:fb8047b156bb	6446	const mbedtls_ssl_transform *transform = ssl->transform_out;
rahul_dahiya	0:fb8047b156bb	6447
rahul_dahiya	0:fb8047b156bb	6448	#if defined(MBEDTLS_ZLIB_SUPPORT)
rahul_dahiya	0:fb8047b156bb	6449	if( ssl->session_out->compression != MBEDTLS_SSL_COMPRESS_NULL )
rahul_dahiya	0:fb8047b156bb	6450	return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE );
rahul_dahiya	0:fb8047b156bb	6451	#endif
rahul_dahiya	0:fb8047b156bb	6452
rahul_dahiya	0:fb8047b156bb	6453	if( transform == NULL )
rahul_dahiya	0:fb8047b156bb	6454	return( (int) mbedtls_ssl_hdr_len( ssl ) );
rahul_dahiya	0:fb8047b156bb	6455
rahul_dahiya	0:fb8047b156bb	6456	switch( mbedtls_cipher_get_cipher_mode( &transform->cipher_ctx_enc ) )
rahul_dahiya	0:fb8047b156bb	6457	{
rahul_dahiya	0:fb8047b156bb	6458	case MBEDTLS_MODE_GCM:
rahul_dahiya	0:fb8047b156bb	6459	case MBEDTLS_MODE_CCM:
rahul_dahiya	0:fb8047b156bb	6460	case MBEDTLS_MODE_STREAM:
rahul_dahiya	0:fb8047b156bb	6461	transform_expansion = transform->minlen;
rahul_dahiya	0:fb8047b156bb	6462	break;
rahul_dahiya	0:fb8047b156bb	6463
rahul_dahiya	0:fb8047b156bb	6464	case MBEDTLS_MODE_CBC:
rahul_dahiya	0:fb8047b156bb	6465	transform_expansion = transform->maclen
rahul_dahiya	0:fb8047b156bb	6466	+ mbedtls_cipher_get_block_size( &transform->cipher_ctx_enc );
rahul_dahiya	0:fb8047b156bb	6467	break;
rahul_dahiya	0:fb8047b156bb	6468
rahul_dahiya	0:fb8047b156bb	6469	default:
rahul_dahiya	0:fb8047b156bb	6470	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
rahul_dahiya	0:fb8047b156bb	6471	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
rahul_dahiya	0:fb8047b156bb	6472	}
rahul_dahiya	0:fb8047b156bb	6473
rahul_dahiya	0:fb8047b156bb	6474	return( (int)( mbedtls_ssl_hdr_len( ssl ) + transform_expansion ) );
rahul_dahiya	0:fb8047b156bb	6475	}
rahul_dahiya	0:fb8047b156bb	6476
rahul_dahiya	0:fb8047b156bb	6477	#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
rahul_dahiya	0:fb8047b156bb	6478	size_t mbedtls_ssl_get_max_frag_len( const mbedtls_ssl_context *ssl )
rahul_dahiya	0:fb8047b156bb	6479	{
rahul_dahiya	0:fb8047b156bb	6480	size_t max_len;
rahul_dahiya	0:fb8047b156bb	6481
rahul_dahiya	0:fb8047b156bb	6482	/*
rahul_dahiya	0:fb8047b156bb	6483	* Assume mfl_code is correct since it was checked when set
rahul_dahiya	0:fb8047b156bb	6484	*/
rahul_dahiya	0:fb8047b156bb	6485	max_len = mfl_code_to_length[ssl->conf->mfl_code];
rahul_dahiya	0:fb8047b156bb	6486
rahul_dahiya	0:fb8047b156bb	6487	/*
rahul_dahiya	0:fb8047b156bb	6488	* Check if a smaller max length was negotiated
rahul_dahiya	0:fb8047b156bb	6489	*/
rahul_dahiya	0:fb8047b156bb	6490	if( ssl->session_out != NULL &&
rahul_dahiya	0:fb8047b156bb	6491	mfl_code_to_length[ssl->session_out->mfl_code] < max_len )
rahul_dahiya	0:fb8047b156bb	6492	{
rahul_dahiya	0:fb8047b156bb	6493	max_len = mfl_code_to_length[ssl->session_out->mfl_code];
rahul_dahiya	0:fb8047b156bb	6494	}
rahul_dahiya	0:fb8047b156bb	6495
rahul_dahiya	0:fb8047b156bb	6496	return max_len;
rahul_dahiya	0:fb8047b156bb	6497	}
rahul_dahiya	0:fb8047b156bb	6498	#endif /* MBEDTLS_SSL_MAX_FRAGMENT_LENGTH */
rahul_dahiya	0:fb8047b156bb	6499
rahul_dahiya	0:fb8047b156bb	6500	#if defined(MBEDTLS_X509_CRT_PARSE_C)
rahul_dahiya	0:fb8047b156bb	6501	const mbedtls_x509_crt mbedtls_ssl_get_peer_cert( const mbedtls_ssl_context ssl )
rahul_dahiya	0:fb8047b156bb	6502	{
rahul_dahiya	0:fb8047b156bb	6503	if( ssl == NULL \|\| ssl->session == NULL )
rahul_dahiya	0:fb8047b156bb	6504	return( NULL );
rahul_dahiya	0:fb8047b156bb	6505
rahul_dahiya	0:fb8047b156bb	6506	return( ssl->session->peer_cert );
rahul_dahiya	0:fb8047b156bb	6507	}
rahul_dahiya	0:fb8047b156bb	6508	#endif /* MBEDTLS_X509_CRT_PARSE_C */
rahul_dahiya	0:fb8047b156bb	6509
rahul_dahiya	0:fb8047b156bb	6510	#if defined(MBEDTLS_SSL_CLI_C)
rahul_dahiya	0:fb8047b156bb	6511	int mbedtls_ssl_get_session( const mbedtls_ssl_context ssl, mbedtls_ssl_session dst )
rahul_dahiya	0:fb8047b156bb	6512	{
rahul_dahiya	0:fb8047b156bb	6513	if( ssl == NULL \|\|
rahul_dahiya	0:fb8047b156bb	6514	dst == NULL \|\|
rahul_dahiya	0:fb8047b156bb	6515	ssl->session == NULL \|\|
rahul_dahiya	0:fb8047b156bb	6516	ssl->conf->endpoint != MBEDTLS_SSL_IS_CLIENT )
rahul_dahiya	0:fb8047b156bb	6517	{
rahul_dahiya	0:fb8047b156bb	6518	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
rahul_dahiya	0:fb8047b156bb	6519	}
rahul_dahiya	0:fb8047b156bb	6520
rahul_dahiya	0:fb8047b156bb	6521	return( ssl_session_copy( dst, ssl->session ) );
rahul_dahiya	0:fb8047b156bb	6522	}
rahul_dahiya	0:fb8047b156bb	6523	#endif /* MBEDTLS_SSL_CLI_C */
rahul_dahiya	0:fb8047b156bb	6524
rahul_dahiya	0:fb8047b156bb	6525	/*
rahul_dahiya	0:fb8047b156bb	6526	* Perform a single step of the SSL handshake
rahul_dahiya	0:fb8047b156bb	6527	*/
rahul_dahiya	0:fb8047b156bb	6528	int mbedtls_ssl_handshake_step( mbedtls_ssl_context *ssl )
rahul_dahiya	0:fb8047b156bb	6529	{
rahul_dahiya	0:fb8047b156bb	6530	int ret = MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE;
rahul_dahiya	0:fb8047b156bb	6531
rahul_dahiya	0:fb8047b156bb	6532	if( ssl == NULL \|\| ssl->conf == NULL )
rahul_dahiya	0:fb8047b156bb	6533	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
rahul_dahiya	0:fb8047b156bb	6534
rahul_dahiya	0:fb8047b156bb	6535	#if defined(MBEDTLS_SSL_CLI_C)
rahul_dahiya	0:fb8047b156bb	6536	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_CLIENT )
rahul_dahiya	0:fb8047b156bb	6537	ret = mbedtls_ssl_handshake_client_step( ssl );
rahul_dahiya	0:fb8047b156bb	6538	#endif
rahul_dahiya	0:fb8047b156bb	6539	#if defined(MBEDTLS_SSL_SRV_C)
rahul_dahiya	0:fb8047b156bb	6540	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER )
rahul_dahiya	0:fb8047b156bb	6541	ret = mbedtls_ssl_handshake_server_step( ssl );
rahul_dahiya	0:fb8047b156bb	6542	#endif
rahul_dahiya	0:fb8047b156bb	6543
rahul_dahiya	0:fb8047b156bb	6544	return( ret );
rahul_dahiya	0:fb8047b156bb	6545	}
rahul_dahiya	0:fb8047b156bb	6546
rahul_dahiya	0:fb8047b156bb	6547	/*
rahul_dahiya	0:fb8047b156bb	6548	* Perform the SSL handshake
rahul_dahiya	0:fb8047b156bb	6549	*/
rahul_dahiya	0:fb8047b156bb	6550	int mbedtls_ssl_handshake( mbedtls_ssl_context *ssl )
rahul_dahiya	0:fb8047b156bb	6551	{
rahul_dahiya	0:fb8047b156bb	6552	int ret = 0;
rahul_dahiya	0:fb8047b156bb	6553
rahul_dahiya	0:fb8047b156bb	6554	if( ssl == NULL \|\| ssl->conf == NULL )
rahul_dahiya	0:fb8047b156bb	6555	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
rahul_dahiya	0:fb8047b156bb	6556
rahul_dahiya	0:fb8047b156bb	6557	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> handshake" ) );
rahul_dahiya	0:fb8047b156bb	6558
rahul_dahiya	0:fb8047b156bb	6559	while( ssl->state != MBEDTLS_SSL_HANDSHAKE_OVER )
rahul_dahiya	0:fb8047b156bb	6560	{
rahul_dahiya	0:fb8047b156bb	6561	ret = mbedtls_ssl_handshake_step( ssl );
rahul_dahiya	0:fb8047b156bb	6562
rahul_dahiya	0:fb8047b156bb	6563	if( ret != 0 )
rahul_dahiya	0:fb8047b156bb	6564	break;
rahul_dahiya	0:fb8047b156bb	6565	}
rahul_dahiya	0:fb8047b156bb	6566
rahul_dahiya	0:fb8047b156bb	6567	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= handshake" ) );
rahul_dahiya	0:fb8047b156bb	6568
rahul_dahiya	0:fb8047b156bb	6569	return( ret );
rahul_dahiya	0:fb8047b156bb	6570	}
rahul_dahiya	0:fb8047b156bb	6571
rahul_dahiya	0:fb8047b156bb	6572	#if defined(MBEDTLS_SSL_RENEGOTIATION)
rahul_dahiya	0:fb8047b156bb	6573	#if defined(MBEDTLS_SSL_SRV_C)
rahul_dahiya	0:fb8047b156bb	6574	/*
rahul_dahiya	0:fb8047b156bb	6575	* Write HelloRequest to request renegotiation on server
rahul_dahiya	0:fb8047b156bb	6576	*/
rahul_dahiya	0:fb8047b156bb	6577	static int ssl_write_hello_request( mbedtls_ssl_context *ssl )
rahul_dahiya	0:fb8047b156bb	6578	{
rahul_dahiya	0:fb8047b156bb	6579	int ret;
rahul_dahiya	0:fb8047b156bb	6580
rahul_dahiya	0:fb8047b156bb	6581	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write hello request" ) );
rahul_dahiya	0:fb8047b156bb	6582
rahul_dahiya	0:fb8047b156bb	6583	ssl->out_msglen = 4;
rahul_dahiya	0:fb8047b156bb	6584	ssl->out_msgtype = MBEDTLS_SSL_MSG_HANDSHAKE;
rahul_dahiya	0:fb8047b156bb	6585	ssl->out_msg[0] = MBEDTLS_SSL_HS_HELLO_REQUEST;
rahul_dahiya	0:fb8047b156bb	6586
rahul_dahiya	0:fb8047b156bb	6587	if( ( ret = mbedtls_ssl_write_record( ssl ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	6588	{
rahul_dahiya	0:fb8047b156bb	6589	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_write_record", ret );
rahul_dahiya	0:fb8047b156bb	6590	return( ret );
rahul_dahiya	0:fb8047b156bb	6591	}
rahul_dahiya	0:fb8047b156bb	6592
rahul_dahiya	0:fb8047b156bb	6593	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= write hello request" ) );
rahul_dahiya	0:fb8047b156bb	6594
rahul_dahiya	0:fb8047b156bb	6595	return( 0 );
rahul_dahiya	0:fb8047b156bb	6596	}
rahul_dahiya	0:fb8047b156bb	6597	#endif /* MBEDTLS_SSL_SRV_C */
rahul_dahiya	0:fb8047b156bb	6598
rahul_dahiya	0:fb8047b156bb	6599	/*
rahul_dahiya	0:fb8047b156bb	6600	* Actually renegotiate current connection, triggered by either:
rahul_dahiya	0:fb8047b156bb	6601	* - any side: calling mbedtls_ssl_renegotiate(),
rahul_dahiya	0:fb8047b156bb	6602	* - client: receiving a HelloRequest during mbedtls_ssl_read(),
rahul_dahiya	0:fb8047b156bb	6603	* - server: receiving any handshake message on server during mbedtls_ssl_read() after
rahul_dahiya	0:fb8047b156bb	6604	* the initial handshake is completed.
rahul_dahiya	0:fb8047b156bb	6605	* If the handshake doesn't complete due to waiting for I/O, it will continue
rahul_dahiya	0:fb8047b156bb	6606	* during the next calls to mbedtls_ssl_renegotiate() or mbedtls_ssl_read() respectively.
rahul_dahiya	0:fb8047b156bb	6607	*/
rahul_dahiya	0:fb8047b156bb	6608	static int ssl_start_renegotiation( mbedtls_ssl_context *ssl )
rahul_dahiya	0:fb8047b156bb	6609	{
rahul_dahiya	0:fb8047b156bb	6610	int ret;
rahul_dahiya	0:fb8047b156bb	6611
rahul_dahiya	0:fb8047b156bb	6612	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> renegotiate" ) );
rahul_dahiya	0:fb8047b156bb	6613
rahul_dahiya	0:fb8047b156bb	6614	if( ( ret = ssl_handshake_init( ssl ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	6615	return( ret );
rahul_dahiya	0:fb8047b156bb	6616
rahul_dahiya	0:fb8047b156bb	6617	/* RFC 6347 4.2.2: "[...] the HelloRequest will have message_seq = 0 and
rahul_dahiya	0:fb8047b156bb	6618	* the ServerHello will have message_seq = 1" */
rahul_dahiya	0:fb8047b156bb	6619	#if defined(MBEDTLS_SSL_PROTO_DTLS)
rahul_dahiya	0:fb8047b156bb	6620	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM &&
rahul_dahiya	0:fb8047b156bb	6621	ssl->renego_status == MBEDTLS_SSL_RENEGOTIATION_PENDING )
rahul_dahiya	0:fb8047b156bb	6622	{
rahul_dahiya	0:fb8047b156bb	6623	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER )
rahul_dahiya	0:fb8047b156bb	6624	ssl->handshake->out_msg_seq = 1;
rahul_dahiya	0:fb8047b156bb	6625	else
rahul_dahiya	0:fb8047b156bb	6626	ssl->handshake->in_msg_seq = 1;
rahul_dahiya	0:fb8047b156bb	6627	}
rahul_dahiya	0:fb8047b156bb	6628	#endif
rahul_dahiya	0:fb8047b156bb	6629
rahul_dahiya	0:fb8047b156bb	6630	ssl->state = MBEDTLS_SSL_HELLO_REQUEST;
rahul_dahiya	0:fb8047b156bb	6631	ssl->renego_status = MBEDTLS_SSL_RENEGOTIATION_IN_PROGRESS;
rahul_dahiya	0:fb8047b156bb	6632
rahul_dahiya	0:fb8047b156bb	6633	if( ( ret = mbedtls_ssl_handshake( ssl ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	6634	{
rahul_dahiya	0:fb8047b156bb	6635	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_handshake", ret );
rahul_dahiya	0:fb8047b156bb	6636	return( ret );
rahul_dahiya	0:fb8047b156bb	6637	}
rahul_dahiya	0:fb8047b156bb	6638
rahul_dahiya	0:fb8047b156bb	6639	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= renegotiate" ) );
rahul_dahiya	0:fb8047b156bb	6640
rahul_dahiya	0:fb8047b156bb	6641	return( 0 );
rahul_dahiya	0:fb8047b156bb	6642	}
rahul_dahiya	0:fb8047b156bb	6643
rahul_dahiya	0:fb8047b156bb	6644	/*
rahul_dahiya	0:fb8047b156bb	6645	* Renegotiate current connection on client,
rahul_dahiya	0:fb8047b156bb	6646	* or request renegotiation on server
rahul_dahiya	0:fb8047b156bb	6647	*/
rahul_dahiya	0:fb8047b156bb	6648	int mbedtls_ssl_renegotiate( mbedtls_ssl_context *ssl )
rahul_dahiya	0:fb8047b156bb	6649	{
rahul_dahiya	0:fb8047b156bb	6650	int ret = MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE;
rahul_dahiya	0:fb8047b156bb	6651
rahul_dahiya	0:fb8047b156bb	6652	if( ssl == NULL \|\| ssl->conf == NULL )
rahul_dahiya	0:fb8047b156bb	6653	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
rahul_dahiya	0:fb8047b156bb	6654
rahul_dahiya	0:fb8047b156bb	6655	#if defined(MBEDTLS_SSL_SRV_C)
rahul_dahiya	0:fb8047b156bb	6656	/* On server, just send the request */
rahul_dahiya	0:fb8047b156bb	6657	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER )
rahul_dahiya	0:fb8047b156bb	6658	{
rahul_dahiya	0:fb8047b156bb	6659	if( ssl->state != MBEDTLS_SSL_HANDSHAKE_OVER )
rahul_dahiya	0:fb8047b156bb	6660	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
rahul_dahiya	0:fb8047b156bb	6661
rahul_dahiya	0:fb8047b156bb	6662	ssl->renego_status = MBEDTLS_SSL_RENEGOTIATION_PENDING;
rahul_dahiya	0:fb8047b156bb	6663
rahul_dahiya	0:fb8047b156bb	6664	/* Did we already try/start sending HelloRequest? */
rahul_dahiya	0:fb8047b156bb	6665	if( ssl->out_left != 0 )
rahul_dahiya	0:fb8047b156bb	6666	return( mbedtls_ssl_flush_output( ssl ) );
rahul_dahiya	0:fb8047b156bb	6667
rahul_dahiya	0:fb8047b156bb	6668	return( ssl_write_hello_request( ssl ) );
rahul_dahiya	0:fb8047b156bb	6669	}
rahul_dahiya	0:fb8047b156bb	6670	#endif /* MBEDTLS_SSL_SRV_C */
rahul_dahiya	0:fb8047b156bb	6671
rahul_dahiya	0:fb8047b156bb	6672	#if defined(MBEDTLS_SSL_CLI_C)
rahul_dahiya	0:fb8047b156bb	6673	/*
rahul_dahiya	0:fb8047b156bb	6674	* On client, either start the renegotiation process or,
rahul_dahiya	0:fb8047b156bb	6675	* if already in progress, continue the handshake
rahul_dahiya	0:fb8047b156bb	6676	*/
rahul_dahiya	0:fb8047b156bb	6677	if( ssl->renego_status != MBEDTLS_SSL_RENEGOTIATION_IN_PROGRESS )
rahul_dahiya	0:fb8047b156bb	6678	{
rahul_dahiya	0:fb8047b156bb	6679	if( ssl->state != MBEDTLS_SSL_HANDSHAKE_OVER )
rahul_dahiya	0:fb8047b156bb	6680	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
rahul_dahiya	0:fb8047b156bb	6681
rahul_dahiya	0:fb8047b156bb	6682	if( ( ret = ssl_start_renegotiation( ssl ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	6683	{
rahul_dahiya	0:fb8047b156bb	6684	MBEDTLS_SSL_DEBUG_RET( 1, "ssl_start_renegotiation", ret );
rahul_dahiya	0:fb8047b156bb	6685	return( ret );
rahul_dahiya	0:fb8047b156bb	6686	}
rahul_dahiya	0:fb8047b156bb	6687	}
rahul_dahiya	0:fb8047b156bb	6688	else
rahul_dahiya	0:fb8047b156bb	6689	{
rahul_dahiya	0:fb8047b156bb	6690	if( ( ret = mbedtls_ssl_handshake( ssl ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	6691	{
rahul_dahiya	0:fb8047b156bb	6692	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_handshake", ret );
rahul_dahiya	0:fb8047b156bb	6693	return( ret );
rahul_dahiya	0:fb8047b156bb	6694	}
rahul_dahiya	0:fb8047b156bb	6695	}
rahul_dahiya	0:fb8047b156bb	6696	#endif /* MBEDTLS_SSL_CLI_C */
rahul_dahiya	0:fb8047b156bb	6697
rahul_dahiya	0:fb8047b156bb	6698	return( ret );
rahul_dahiya	0:fb8047b156bb	6699	}
rahul_dahiya	0:fb8047b156bb	6700
rahul_dahiya	0:fb8047b156bb	6701	/*
rahul_dahiya	0:fb8047b156bb	6702	* Check record counters and renegotiate if they're above the limit.
rahul_dahiya	0:fb8047b156bb	6703	*/
rahul_dahiya	0:fb8047b156bb	6704	static int ssl_check_ctr_renegotiate( mbedtls_ssl_context *ssl )
rahul_dahiya	0:fb8047b156bb	6705	{
rahul_dahiya	0:fb8047b156bb	6706	size_t ep_len = ssl_ep_len( ssl );
rahul_dahiya	0:fb8047b156bb	6707	int in_ctr_cmp;
rahul_dahiya	0:fb8047b156bb	6708	int out_ctr_cmp;
rahul_dahiya	0:fb8047b156bb	6709
rahul_dahiya	0:fb8047b156bb	6710	if( ssl->state != MBEDTLS_SSL_HANDSHAKE_OVER \|\|
rahul_dahiya	0:fb8047b156bb	6711	ssl->renego_status == MBEDTLS_SSL_RENEGOTIATION_PENDING \|\|
rahul_dahiya	0:fb8047b156bb	6712	ssl->conf->disable_renegotiation == MBEDTLS_SSL_RENEGOTIATION_DISABLED )
rahul_dahiya	0:fb8047b156bb	6713	{
rahul_dahiya	0:fb8047b156bb	6714	return( 0 );
rahul_dahiya	0:fb8047b156bb	6715	}
rahul_dahiya	0:fb8047b156bb	6716
rahul_dahiya	0:fb8047b156bb	6717	in_ctr_cmp = memcmp( ssl->in_ctr + ep_len,
rahul_dahiya	0:fb8047b156bb	6718	ssl->conf->renego_period + ep_len, 8 - ep_len );
rahul_dahiya	0:fb8047b156bb	6719	out_ctr_cmp = memcmp( ssl->out_ctr + ep_len,
rahul_dahiya	0:fb8047b156bb	6720	ssl->conf->renego_period + ep_len, 8 - ep_len );
rahul_dahiya	0:fb8047b156bb	6721
rahul_dahiya	0:fb8047b156bb	6722	if( in_ctr_cmp <= 0 && out_ctr_cmp <= 0 )
rahul_dahiya	0:fb8047b156bb	6723	{
rahul_dahiya	0:fb8047b156bb	6724	return( 0 );
rahul_dahiya	0:fb8047b156bb	6725	}
rahul_dahiya	0:fb8047b156bb	6726
rahul_dahiya	0:fb8047b156bb	6727	MBEDTLS_SSL_DEBUG_MSG( 1, ( "record counter limit reached: renegotiate" ) );
rahul_dahiya	0:fb8047b156bb	6728	return( mbedtls_ssl_renegotiate( ssl ) );
rahul_dahiya	0:fb8047b156bb	6729	}
rahul_dahiya	0:fb8047b156bb	6730	#endif /* MBEDTLS_SSL_RENEGOTIATION */
rahul_dahiya	0:fb8047b156bb	6731
rahul_dahiya	0:fb8047b156bb	6732	/*
rahul_dahiya	0:fb8047b156bb	6733	* Receive application data decrypted from the SSL layer
rahul_dahiya	0:fb8047b156bb	6734	*/
rahul_dahiya	0:fb8047b156bb	6735	int mbedtls_ssl_read( mbedtls_ssl_context ssl, unsigned char buf, size_t len )
rahul_dahiya	0:fb8047b156bb	6736	{
rahul_dahiya	0:fb8047b156bb	6737	int ret;
rahul_dahiya	0:fb8047b156bb	6738	size_t n;
rahul_dahiya	0:fb8047b156bb	6739
rahul_dahiya	0:fb8047b156bb	6740	if( ssl == NULL \|\| ssl->conf == NULL )
rahul_dahiya	0:fb8047b156bb	6741	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
rahul_dahiya	0:fb8047b156bb	6742
rahul_dahiya	0:fb8047b156bb	6743	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> read" ) );
rahul_dahiya	0:fb8047b156bb	6744
rahul_dahiya	0:fb8047b156bb	6745	#if defined(MBEDTLS_SSL_PROTO_DTLS)
rahul_dahiya	0:fb8047b156bb	6746	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
rahul_dahiya	0:fb8047b156bb	6747	{
rahul_dahiya	0:fb8047b156bb	6748	if( ( ret = mbedtls_ssl_flush_output( ssl ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	6749	return( ret );
rahul_dahiya	0:fb8047b156bb	6750
rahul_dahiya	0:fb8047b156bb	6751	if( ssl->handshake != NULL &&
rahul_dahiya	0:fb8047b156bb	6752	ssl->handshake->retransmit_state == MBEDTLS_SSL_RETRANS_SENDING )
rahul_dahiya	0:fb8047b156bb	6753	{
rahul_dahiya	0:fb8047b156bb	6754	if( ( ret = mbedtls_ssl_resend( ssl ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	6755	return( ret );
rahul_dahiya	0:fb8047b156bb	6756	}
rahul_dahiya	0:fb8047b156bb	6757	}
rahul_dahiya	0:fb8047b156bb	6758	#endif
rahul_dahiya	0:fb8047b156bb	6759
rahul_dahiya	0:fb8047b156bb	6760	/*
rahul_dahiya	0:fb8047b156bb	6761	* Check if renegotiation is necessary and/or handshake is
rahul_dahiya	0:fb8047b156bb	6762	* in process. If yes, perform/continue, and fall through
rahul_dahiya	0:fb8047b156bb	6763	* if an unexpected packet is received while the client
rahul_dahiya	0:fb8047b156bb	6764	* is waiting for the ServerHello.
rahul_dahiya	0:fb8047b156bb	6765	*
rahul_dahiya	0:fb8047b156bb	6766	* (There is no equivalent to the last condition on
rahul_dahiya	0:fb8047b156bb	6767	* the server-side as it is not treated as within
rahul_dahiya	0:fb8047b156bb	6768	* a handshake while waiting for the ClientHello
rahul_dahiya	0:fb8047b156bb	6769	* after a renegotiation request.)
rahul_dahiya	0:fb8047b156bb	6770	*/
rahul_dahiya	0:fb8047b156bb	6771
rahul_dahiya	0:fb8047b156bb	6772	#if defined(MBEDTLS_SSL_RENEGOTIATION)
rahul_dahiya	0:fb8047b156bb	6773	ret = ssl_check_ctr_renegotiate( ssl );
rahul_dahiya	0:fb8047b156bb	6774	if( ret != MBEDTLS_ERR_SSL_WAITING_SERVER_HELLO_RENEGO &&
rahul_dahiya	0:fb8047b156bb	6775	ret != 0 )
rahul_dahiya	0:fb8047b156bb	6776	{
rahul_dahiya	0:fb8047b156bb	6777	MBEDTLS_SSL_DEBUG_RET( 1, "ssl_check_ctr_renegotiate", ret );
rahul_dahiya	0:fb8047b156bb	6778	return( ret );
rahul_dahiya	0:fb8047b156bb	6779	}
rahul_dahiya	0:fb8047b156bb	6780	#endif
rahul_dahiya	0:fb8047b156bb	6781
rahul_dahiya	0:fb8047b156bb	6782	if( ssl->state != MBEDTLS_SSL_HANDSHAKE_OVER )
rahul_dahiya	0:fb8047b156bb	6783	{
rahul_dahiya	0:fb8047b156bb	6784	ret = mbedtls_ssl_handshake( ssl );
rahul_dahiya	0:fb8047b156bb	6785	if( ret != MBEDTLS_ERR_SSL_WAITING_SERVER_HELLO_RENEGO &&
rahul_dahiya	0:fb8047b156bb	6786	ret != 0 )
rahul_dahiya	0:fb8047b156bb	6787	{
rahul_dahiya	0:fb8047b156bb	6788	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_handshake", ret );
rahul_dahiya	0:fb8047b156bb	6789	return( ret );
rahul_dahiya	0:fb8047b156bb	6790	}
rahul_dahiya	0:fb8047b156bb	6791	}
rahul_dahiya	0:fb8047b156bb	6792
rahul_dahiya	0:fb8047b156bb	6793	/*
rahul_dahiya	0:fb8047b156bb	6794	* TODO
rahul_dahiya	0:fb8047b156bb	6795	*
rahul_dahiya	0:fb8047b156bb	6796	* The logic should be streamlined here:
rahul_dahiya	0:fb8047b156bb	6797	*
rahul_dahiya	0:fb8047b156bb	6798	* Instead of
rahul_dahiya	0:fb8047b156bb	6799	*
rahul_dahiya	0:fb8047b156bb	6800	* - Manually checking whether ssl->in_offt is NULL
rahul_dahiya	0:fb8047b156bb	6801	* - Fetching a new record if yes
rahul_dahiya	0:fb8047b156bb	6802	* - Setting ssl->in_offt if one finds an application record
rahul_dahiya	0:fb8047b156bb	6803	* - Resetting keep_current_message after handling the application data
rahul_dahiya	0:fb8047b156bb	6804	*
rahul_dahiya	0:fb8047b156bb	6805	* one should
rahul_dahiya	0:fb8047b156bb	6806	*
rahul_dahiya	0:fb8047b156bb	6807	* - Adapt read_record to set ssl->in_offt automatically
rahul_dahiya	0:fb8047b156bb	6808	* when a new application data record is processed.
rahul_dahiya	0:fb8047b156bb	6809	* - Always call mbedtls_ssl_read_record here.
rahul_dahiya	0:fb8047b156bb	6810	*
rahul_dahiya	0:fb8047b156bb	6811	* This way, the logic of ssl_read would be much clearer:
rahul_dahiya	0:fb8047b156bb	6812	*
rahul_dahiya	0:fb8047b156bb	6813	* (1) Always call record layer and see what kind of record is on
rahul_dahiya	0:fb8047b156bb	6814	* and have it ready for consumption (in particular, in_offt
rahul_dahiya	0:fb8047b156bb	6815	* properly set for application data records).
rahul_dahiya	0:fb8047b156bb	6816	* (2) If it's application data (either freshly fetched
rahul_dahiya	0:fb8047b156bb	6817	* or something already being partially processed),
rahul_dahiya	0:fb8047b156bb	6818	* serve the read request from it.
rahul_dahiya	0:fb8047b156bb	6819	* (3) If it's something different from application data,
rahul_dahiya	0:fb8047b156bb	6820	* handle it accordingly, e.g. potentially start a
rahul_dahiya	0:fb8047b156bb	6821	* renegotiation.
rahul_dahiya	0:fb8047b156bb	6822	*
rahul_dahiya	0:fb8047b156bb	6823	* This will also remove the need to manually reset
rahul_dahiya	0:fb8047b156bb	6824	* ssl->keep_current_message = 0 below.
rahul_dahiya	0:fb8047b156bb	6825	*
rahul_dahiya	0:fb8047b156bb	6826	*/
rahul_dahiya	0:fb8047b156bb	6827
rahul_dahiya	0:fb8047b156bb	6828	if( ssl->in_offt == NULL )
rahul_dahiya	0:fb8047b156bb	6829	{
rahul_dahiya	0:fb8047b156bb	6830	/* Start timer if not already running */
rahul_dahiya	0:fb8047b156bb	6831	if( ssl->f_get_timer != NULL &&
rahul_dahiya	0:fb8047b156bb	6832	ssl->f_get_timer( ssl->p_timer ) == -1 )
rahul_dahiya	0:fb8047b156bb	6833	{
rahul_dahiya	0:fb8047b156bb	6834	ssl_set_timer( ssl, ssl->conf->read_timeout );
rahul_dahiya	0:fb8047b156bb	6835	}
rahul_dahiya	0:fb8047b156bb	6836
rahul_dahiya	0:fb8047b156bb	6837	if( ( ret = mbedtls_ssl_read_record( ssl ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	6838	{
rahul_dahiya	0:fb8047b156bb	6839	if( ret == MBEDTLS_ERR_SSL_CONN_EOF )
rahul_dahiya	0:fb8047b156bb	6840	return( 0 );
rahul_dahiya	0:fb8047b156bb	6841
rahul_dahiya	0:fb8047b156bb	6842	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_read_record", ret );
rahul_dahiya	0:fb8047b156bb	6843	return( ret );
rahul_dahiya	0:fb8047b156bb	6844	}
rahul_dahiya	0:fb8047b156bb	6845
rahul_dahiya	0:fb8047b156bb	6846	if( ssl->in_msglen == 0 &&
rahul_dahiya	0:fb8047b156bb	6847	ssl->in_msgtype == MBEDTLS_SSL_MSG_APPLICATION_DATA )
rahul_dahiya	0:fb8047b156bb	6848	{
rahul_dahiya	0:fb8047b156bb	6849	/*
rahul_dahiya	0:fb8047b156bb	6850	* OpenSSL sends empty messages to randomize the IV
rahul_dahiya	0:fb8047b156bb	6851	*/
rahul_dahiya	0:fb8047b156bb	6852	if( ( ret = mbedtls_ssl_read_record( ssl ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	6853	{
rahul_dahiya	0:fb8047b156bb	6854	if( ret == MBEDTLS_ERR_SSL_CONN_EOF )
rahul_dahiya	0:fb8047b156bb	6855	return( 0 );
rahul_dahiya	0:fb8047b156bb	6856
rahul_dahiya	0:fb8047b156bb	6857	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_read_record", ret );
rahul_dahiya	0:fb8047b156bb	6858	return( ret );
rahul_dahiya	0:fb8047b156bb	6859	}
rahul_dahiya	0:fb8047b156bb	6860	}
rahul_dahiya	0:fb8047b156bb	6861
rahul_dahiya	0:fb8047b156bb	6862	#if defined(MBEDTLS_SSL_RENEGOTIATION)
rahul_dahiya	0:fb8047b156bb	6863	if( ssl->in_msgtype == MBEDTLS_SSL_MSG_HANDSHAKE )
rahul_dahiya	0:fb8047b156bb	6864	{
rahul_dahiya	0:fb8047b156bb	6865	MBEDTLS_SSL_DEBUG_MSG( 1, ( "received handshake message" ) );
rahul_dahiya	0:fb8047b156bb	6866
rahul_dahiya	0:fb8047b156bb	6867	/*
rahul_dahiya	0:fb8047b156bb	6868	* - For client-side, expect SERVER_HELLO_REQUEST.
rahul_dahiya	0:fb8047b156bb	6869	* - For server-side, expect CLIENT_HELLO.
rahul_dahiya	0:fb8047b156bb	6870	* - Fail (TLS) or silently drop record (DTLS) in other cases.
rahul_dahiya	0:fb8047b156bb	6871	*/
rahul_dahiya	0:fb8047b156bb	6872
rahul_dahiya	0:fb8047b156bb	6873	#if defined(MBEDTLS_SSL_CLI_C)
rahul_dahiya	0:fb8047b156bb	6874	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_CLIENT &&
rahul_dahiya	0:fb8047b156bb	6875	( ssl->in_msg[0] != MBEDTLS_SSL_HS_HELLO_REQUEST \|\|
rahul_dahiya	0:fb8047b156bb	6876	ssl->in_hslen != mbedtls_ssl_hs_hdr_len( ssl ) ) )
rahul_dahiya	0:fb8047b156bb	6877	{
rahul_dahiya	0:fb8047b156bb	6878	MBEDTLS_SSL_DEBUG_MSG( 1, ( "handshake received (not HelloRequest)" ) );
rahul_dahiya	0:fb8047b156bb	6879
rahul_dahiya	0:fb8047b156bb	6880	/* With DTLS, drop the packet (probably from last handshake) */
rahul_dahiya	0:fb8047b156bb	6881	#if defined(MBEDTLS_SSL_PROTO_DTLS)
rahul_dahiya	0:fb8047b156bb	6882	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
rahul_dahiya	0:fb8047b156bb	6883	return( MBEDTLS_ERR_SSL_WANT_READ );
rahul_dahiya	0:fb8047b156bb	6884	#endif
rahul_dahiya	0:fb8047b156bb	6885	return( MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE );
rahul_dahiya	0:fb8047b156bb	6886	}
rahul_dahiya	0:fb8047b156bb	6887	#endif /* MBEDTLS_SSL_CLI_C */
rahul_dahiya	0:fb8047b156bb	6888
rahul_dahiya	0:fb8047b156bb	6889	#if defined(MBEDTLS_SSL_SRV_C)
rahul_dahiya	0:fb8047b156bb	6890	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER &&
rahul_dahiya	0:fb8047b156bb	6891	ssl->in_msg[0] != MBEDTLS_SSL_HS_CLIENT_HELLO )
rahul_dahiya	0:fb8047b156bb	6892	{
rahul_dahiya	0:fb8047b156bb	6893	MBEDTLS_SSL_DEBUG_MSG( 1, ( "handshake received (not ClientHello)" ) );
rahul_dahiya	0:fb8047b156bb	6894
rahul_dahiya	0:fb8047b156bb	6895	/* With DTLS, drop the packet (probably from last handshake) */
rahul_dahiya	0:fb8047b156bb	6896	#if defined(MBEDTLS_SSL_PROTO_DTLS)
rahul_dahiya	0:fb8047b156bb	6897	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
rahul_dahiya	0:fb8047b156bb	6898	return( MBEDTLS_ERR_SSL_WANT_READ );
rahul_dahiya	0:fb8047b156bb	6899	#endif
rahul_dahiya	0:fb8047b156bb	6900	return( MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE );
rahul_dahiya	0:fb8047b156bb	6901	}
rahul_dahiya	0:fb8047b156bb	6902	#endif /* MBEDTLS_SSL_SRV_C */
rahul_dahiya	0:fb8047b156bb	6903
rahul_dahiya	0:fb8047b156bb	6904	/* Determine whether renegotiation attempt should be accepted */
rahul_dahiya	0:fb8047b156bb	6905
rahul_dahiya	0:fb8047b156bb	6906	if( ssl->conf->disable_renegotiation == MBEDTLS_SSL_RENEGOTIATION_DISABLED \|\|
rahul_dahiya	0:fb8047b156bb	6907	( ssl->secure_renegotiation == MBEDTLS_SSL_LEGACY_RENEGOTIATION &&
rahul_dahiya	0:fb8047b156bb	6908	ssl->conf->allow_legacy_renegotiation ==
rahul_dahiya	0:fb8047b156bb	6909	MBEDTLS_SSL_LEGACY_NO_RENEGOTIATION ) )
rahul_dahiya	0:fb8047b156bb	6910	{
rahul_dahiya	0:fb8047b156bb	6911	/*
rahul_dahiya	0:fb8047b156bb	6912	* Refuse renegotiation
rahul_dahiya	0:fb8047b156bb	6913	*/
rahul_dahiya	0:fb8047b156bb	6914
rahul_dahiya	0:fb8047b156bb	6915	MBEDTLS_SSL_DEBUG_MSG( 3, ( "refusing renegotiation, sending alert" ) );
rahul_dahiya	0:fb8047b156bb	6916
rahul_dahiya	0:fb8047b156bb	6917	#if defined(MBEDTLS_SSL_PROTO_SSL3)
rahul_dahiya	0:fb8047b156bb	6918	if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 )
rahul_dahiya	0:fb8047b156bb	6919	{
rahul_dahiya	0:fb8047b156bb	6920	/* SSLv3 does not have a "no_renegotiation" warning, so
rahul_dahiya	0:fb8047b156bb	6921	we send a fatal alert and abort the connection. */
rahul_dahiya	0:fb8047b156bb	6922	mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
rahul_dahiya	0:fb8047b156bb	6923	MBEDTLS_SSL_ALERT_MSG_UNEXPECTED_MESSAGE );
rahul_dahiya	0:fb8047b156bb	6924	return( MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE );
rahul_dahiya	0:fb8047b156bb	6925	}
rahul_dahiya	0:fb8047b156bb	6926	else
rahul_dahiya	0:fb8047b156bb	6927	#endif /* MBEDTLS_SSL_PROTO_SSL3 */
rahul_dahiya	0:fb8047b156bb	6928	#if defined(MBEDTLS_SSL_PROTO_TLS1) \|\| defined(MBEDTLS_SSL_PROTO_TLS1_1) \|\| \
rahul_dahiya	0:fb8047b156bb	6929	defined(MBEDTLS_SSL_PROTO_TLS1_2)
rahul_dahiya	0:fb8047b156bb	6930	if( ssl->minor_ver >= MBEDTLS_SSL_MINOR_VERSION_1 )
rahul_dahiya	0:fb8047b156bb	6931	{
rahul_dahiya	0:fb8047b156bb	6932	if( ( ret = mbedtls_ssl_send_alert_message( ssl,
rahul_dahiya	0:fb8047b156bb	6933	MBEDTLS_SSL_ALERT_LEVEL_WARNING,
rahul_dahiya	0:fb8047b156bb	6934	MBEDTLS_SSL_ALERT_MSG_NO_RENEGOTIATION ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	6935	{
rahul_dahiya	0:fb8047b156bb	6936	return( ret );
rahul_dahiya	0:fb8047b156bb	6937	}
rahul_dahiya	0:fb8047b156bb	6938	}
rahul_dahiya	0:fb8047b156bb	6939	else
rahul_dahiya	0:fb8047b156bb	6940	#endif /* MBEDTLS_SSL_PROTO_TLS1 \|\| MBEDTLS_SSL_PROTO_TLS1_1 \|\|
rahul_dahiya	0:fb8047b156bb	6941	MBEDTLS_SSL_PROTO_TLS1_2 */
rahul_dahiya	0:fb8047b156bb	6942	{
rahul_dahiya	0:fb8047b156bb	6943	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
rahul_dahiya	0:fb8047b156bb	6944	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
rahul_dahiya	0:fb8047b156bb	6945	}
rahul_dahiya	0:fb8047b156bb	6946	}
rahul_dahiya	0:fb8047b156bb	6947	else
rahul_dahiya	0:fb8047b156bb	6948	{
rahul_dahiya	0:fb8047b156bb	6949	/*
rahul_dahiya	0:fb8047b156bb	6950	* Accept renegotiation request
rahul_dahiya	0:fb8047b156bb	6951	*/
rahul_dahiya	0:fb8047b156bb	6952
rahul_dahiya	0:fb8047b156bb	6953	/* DTLS clients need to know renego is server-initiated */
rahul_dahiya	0:fb8047b156bb	6954	#if defined(MBEDTLS_SSL_PROTO_DTLS)
rahul_dahiya	0:fb8047b156bb	6955	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM &&
rahul_dahiya	0:fb8047b156bb	6956	ssl->conf->endpoint == MBEDTLS_SSL_IS_CLIENT )
rahul_dahiya	0:fb8047b156bb	6957	{
rahul_dahiya	0:fb8047b156bb	6958	ssl->renego_status = MBEDTLS_SSL_RENEGOTIATION_PENDING;
rahul_dahiya	0:fb8047b156bb	6959	}
rahul_dahiya	0:fb8047b156bb	6960	#endif
rahul_dahiya	0:fb8047b156bb	6961	ret = ssl_start_renegotiation( ssl );
rahul_dahiya	0:fb8047b156bb	6962	if( ret != MBEDTLS_ERR_SSL_WAITING_SERVER_HELLO_RENEGO &&
rahul_dahiya	0:fb8047b156bb	6963	ret != 0 )
rahul_dahiya	0:fb8047b156bb	6964	{
rahul_dahiya	0:fb8047b156bb	6965	MBEDTLS_SSL_DEBUG_RET( 1, "ssl_start_renegotiation", ret );
rahul_dahiya	0:fb8047b156bb	6966	return( ret );
rahul_dahiya	0:fb8047b156bb	6967	}
rahul_dahiya	0:fb8047b156bb	6968	}
rahul_dahiya	0:fb8047b156bb	6969
rahul_dahiya	0:fb8047b156bb	6970	return( MBEDTLS_ERR_SSL_WANT_READ );
rahul_dahiya	0:fb8047b156bb	6971	}
rahul_dahiya	0:fb8047b156bb	6972	else if( ssl->renego_status == MBEDTLS_SSL_RENEGOTIATION_PENDING )
rahul_dahiya	0:fb8047b156bb	6973	{
rahul_dahiya	0:fb8047b156bb	6974	if( ssl->conf->renego_max_records >= 0 )
rahul_dahiya	0:fb8047b156bb	6975	{
rahul_dahiya	0:fb8047b156bb	6976	if( ++ssl->renego_records_seen > ssl->conf->renego_max_records )
rahul_dahiya	0:fb8047b156bb	6977	{
rahul_dahiya	0:fb8047b156bb	6978	MBEDTLS_SSL_DEBUG_MSG( 1, ( "renegotiation requested, "
rahul_dahiya	0:fb8047b156bb	6979	"but not honored by client" ) );
rahul_dahiya	0:fb8047b156bb	6980	return( MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE );
rahul_dahiya	0:fb8047b156bb	6981	}
rahul_dahiya	0:fb8047b156bb	6982	}
rahul_dahiya	0:fb8047b156bb	6983	}
rahul_dahiya	0:fb8047b156bb	6984	#endif /* MBEDTLS_SSL_RENEGOTIATION */
rahul_dahiya	0:fb8047b156bb	6985
rahul_dahiya	0:fb8047b156bb	6986	/* Fatal and closure alerts handled by mbedtls_ssl_read_record() */
rahul_dahiya	0:fb8047b156bb	6987	if( ssl->in_msgtype == MBEDTLS_SSL_MSG_ALERT )
rahul_dahiya	0:fb8047b156bb	6988	{
rahul_dahiya	0:fb8047b156bb	6989	MBEDTLS_SSL_DEBUG_MSG( 2, ( "ignoring non-fatal non-closure alert" ) );
rahul_dahiya	0:fb8047b156bb	6990	return( MBEDTLS_ERR_SSL_WANT_READ );
rahul_dahiya	0:fb8047b156bb	6991	}
rahul_dahiya	0:fb8047b156bb	6992
rahul_dahiya	0:fb8047b156bb	6993	if( ssl->in_msgtype != MBEDTLS_SSL_MSG_APPLICATION_DATA )
rahul_dahiya	0:fb8047b156bb	6994	{
rahul_dahiya	0:fb8047b156bb	6995	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad application data message" ) );
rahul_dahiya	0:fb8047b156bb	6996	return( MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE );
rahul_dahiya	0:fb8047b156bb	6997	}
rahul_dahiya	0:fb8047b156bb	6998
rahul_dahiya	0:fb8047b156bb	6999	ssl->in_offt = ssl->in_msg;
rahul_dahiya	0:fb8047b156bb	7000
rahul_dahiya	0:fb8047b156bb	7001	/* We're going to return something now, cancel timer,
rahul_dahiya	0:fb8047b156bb	7002	* except if handshake (renegotiation) is in progress */
rahul_dahiya	0:fb8047b156bb	7003	if( ssl->state == MBEDTLS_SSL_HANDSHAKE_OVER )
rahul_dahiya	0:fb8047b156bb	7004	ssl_set_timer( ssl, 0 );
rahul_dahiya	0:fb8047b156bb	7005
rahul_dahiya	0:fb8047b156bb	7006	#if defined(MBEDTLS_SSL_PROTO_DTLS)
rahul_dahiya	0:fb8047b156bb	7007	/* If we requested renego but received AppData, resend HelloRequest.
rahul_dahiya	0:fb8047b156bb	7008	* Do it now, after setting in_offt, to avoid taking this branch
rahul_dahiya	0:fb8047b156bb	7009	* again if ssl_write_hello_request() returns WANT_WRITE */
rahul_dahiya	0:fb8047b156bb	7010	#if defined(MBEDTLS_SSL_SRV_C) && defined(MBEDTLS_SSL_RENEGOTIATION)
rahul_dahiya	0:fb8047b156bb	7011	if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER &&
rahul_dahiya	0:fb8047b156bb	7012	ssl->renego_status == MBEDTLS_SSL_RENEGOTIATION_PENDING )
rahul_dahiya	0:fb8047b156bb	7013	{
rahul_dahiya	0:fb8047b156bb	7014	if( ( ret = ssl_resend_hello_request( ssl ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	7015	{
rahul_dahiya	0:fb8047b156bb	7016	MBEDTLS_SSL_DEBUG_RET( 1, "ssl_resend_hello_request", ret );
rahul_dahiya	0:fb8047b156bb	7017	return( ret );
rahul_dahiya	0:fb8047b156bb	7018	}
rahul_dahiya	0:fb8047b156bb	7019	}
rahul_dahiya	0:fb8047b156bb	7020	#endif /* MBEDTLS_SSL_SRV_C && MBEDTLS_SSL_RENEGOTIATION */
rahul_dahiya	0:fb8047b156bb	7021	#endif /* MBEDTLS_SSL_PROTO_DTLS */
rahul_dahiya	0:fb8047b156bb	7022	}
rahul_dahiya	0:fb8047b156bb	7023
rahul_dahiya	0:fb8047b156bb	7024	n = ( len < ssl->in_msglen )
rahul_dahiya	0:fb8047b156bb	7025	? len : ssl->in_msglen;
rahul_dahiya	0:fb8047b156bb	7026
rahul_dahiya	0:fb8047b156bb	7027	memcpy( buf, ssl->in_offt, n );
rahul_dahiya	0:fb8047b156bb	7028	ssl->in_msglen -= n;
rahul_dahiya	0:fb8047b156bb	7029
rahul_dahiya	0:fb8047b156bb	7030	if( ssl->in_msglen == 0 )
rahul_dahiya	0:fb8047b156bb	7031	{
rahul_dahiya	0:fb8047b156bb	7032	/* all bytes consumed */
rahul_dahiya	0:fb8047b156bb	7033	ssl->in_offt = NULL;
rahul_dahiya	0:fb8047b156bb	7034	ssl->keep_current_message = 0;
rahul_dahiya	0:fb8047b156bb	7035	}
rahul_dahiya	0:fb8047b156bb	7036	else
rahul_dahiya	0:fb8047b156bb	7037	{
rahul_dahiya	0:fb8047b156bb	7038	/* more data available */
rahul_dahiya	0:fb8047b156bb	7039	ssl->in_offt += n;
rahul_dahiya	0:fb8047b156bb	7040	}
rahul_dahiya	0:fb8047b156bb	7041
rahul_dahiya	0:fb8047b156bb	7042	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= read" ) );
rahul_dahiya	0:fb8047b156bb	7043
rahul_dahiya	0:fb8047b156bb	7044	return( (int) n );
rahul_dahiya	0:fb8047b156bb	7045	}
rahul_dahiya	0:fb8047b156bb	7046
rahul_dahiya	0:fb8047b156bb	7047	/*
rahul_dahiya	0:fb8047b156bb	7048	* Send application data to be encrypted by the SSL layer,
rahul_dahiya	0:fb8047b156bb	7049	* taking care of max fragment length and buffer size
rahul_dahiya	0:fb8047b156bb	7050	*/
rahul_dahiya	0:fb8047b156bb	7051	static int ssl_write_real( mbedtls_ssl_context *ssl,
rahul_dahiya	0:fb8047b156bb	7052	const unsigned char *buf, size_t len )
rahul_dahiya	0:fb8047b156bb	7053	{
rahul_dahiya	0:fb8047b156bb	7054	int ret;
rahul_dahiya	0:fb8047b156bb	7055	#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
rahul_dahiya	0:fb8047b156bb	7056	size_t max_len = mbedtls_ssl_get_max_frag_len( ssl );
rahul_dahiya	0:fb8047b156bb	7057
rahul_dahiya	0:fb8047b156bb	7058	if( len > max_len )
rahul_dahiya	0:fb8047b156bb	7059	{
rahul_dahiya	0:fb8047b156bb	7060	#if defined(MBEDTLS_SSL_PROTO_DTLS)
rahul_dahiya	0:fb8047b156bb	7061	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
rahul_dahiya	0:fb8047b156bb	7062	{
rahul_dahiya	0:fb8047b156bb	7063	MBEDTLS_SSL_DEBUG_MSG( 1, ( "fragment larger than the (negotiated) "
rahul_dahiya	0:fb8047b156bb	7064	"maximum fragment length: %d > %d",
rahul_dahiya	0:fb8047b156bb	7065	len, max_len ) );
rahul_dahiya	0:fb8047b156bb	7066	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
rahul_dahiya	0:fb8047b156bb	7067	}
rahul_dahiya	0:fb8047b156bb	7068	else
rahul_dahiya	0:fb8047b156bb	7069	#endif
rahul_dahiya	0:fb8047b156bb	7070	len = max_len;
rahul_dahiya	0:fb8047b156bb	7071	}
rahul_dahiya	0:fb8047b156bb	7072	#endif /* MBEDTLS_SSL_MAX_FRAGMENT_LENGTH */
rahul_dahiya	0:fb8047b156bb	7073
rahul_dahiya	0:fb8047b156bb	7074	if( ssl->out_left != 0 )
rahul_dahiya	0:fb8047b156bb	7075	{
rahul_dahiya	0:fb8047b156bb	7076	if( ( ret = mbedtls_ssl_flush_output( ssl ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	7077	{
rahul_dahiya	0:fb8047b156bb	7078	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_flush_output", ret );
rahul_dahiya	0:fb8047b156bb	7079	return( ret );
rahul_dahiya	0:fb8047b156bb	7080	}
rahul_dahiya	0:fb8047b156bb	7081	}
rahul_dahiya	0:fb8047b156bb	7082	else
rahul_dahiya	0:fb8047b156bb	7083	{
rahul_dahiya	0:fb8047b156bb	7084	ssl->out_msglen = len;
rahul_dahiya	0:fb8047b156bb	7085	ssl->out_msgtype = MBEDTLS_SSL_MSG_APPLICATION_DATA;
rahul_dahiya	0:fb8047b156bb	7086	memcpy( ssl->out_msg, buf, len );
rahul_dahiya	0:fb8047b156bb	7087
rahul_dahiya	0:fb8047b156bb	7088	if( ( ret = mbedtls_ssl_write_record( ssl ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	7089	{
rahul_dahiya	0:fb8047b156bb	7090	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_write_record", ret );
rahul_dahiya	0:fb8047b156bb	7091	return( ret );
rahul_dahiya	0:fb8047b156bb	7092	}
rahul_dahiya	0:fb8047b156bb	7093	}
rahul_dahiya	0:fb8047b156bb	7094
rahul_dahiya	0:fb8047b156bb	7095	return( (int) len );
rahul_dahiya	0:fb8047b156bb	7096	}
rahul_dahiya	0:fb8047b156bb	7097
rahul_dahiya	0:fb8047b156bb	7098	/*
rahul_dahiya	0:fb8047b156bb	7099	* Write application data, doing 1/n-1 splitting if necessary.
rahul_dahiya	0:fb8047b156bb	7100	*
rahul_dahiya	0:fb8047b156bb	7101	* With non-blocking I/O, ssl_write_real() may return WANT_WRITE,
rahul_dahiya	0:fb8047b156bb	7102	* then the caller will call us again with the same arguments, so
rahul_dahiya	0:fb8047b156bb	7103	* remember wether we already did the split or not.
rahul_dahiya	0:fb8047b156bb	7104	*/
rahul_dahiya	0:fb8047b156bb	7105	#if defined(MBEDTLS_SSL_CBC_RECORD_SPLITTING)
rahul_dahiya	0:fb8047b156bb	7106	static int ssl_write_split( mbedtls_ssl_context *ssl,
rahul_dahiya	0:fb8047b156bb	7107	const unsigned char *buf, size_t len )
rahul_dahiya	0:fb8047b156bb	7108	{
rahul_dahiya	0:fb8047b156bb	7109	int ret;
rahul_dahiya	0:fb8047b156bb	7110
rahul_dahiya	0:fb8047b156bb	7111	if( ssl->conf->cbc_record_splitting ==
rahul_dahiya	0:fb8047b156bb	7112	MBEDTLS_SSL_CBC_RECORD_SPLITTING_DISABLED \|\|
rahul_dahiya	0:fb8047b156bb	7113	len <= 1 \|\|
rahul_dahiya	0:fb8047b156bb	7114	ssl->minor_ver > MBEDTLS_SSL_MINOR_VERSION_1 \|\|
rahul_dahiya	0:fb8047b156bb	7115	mbedtls_cipher_get_cipher_mode( &ssl->transform_out->cipher_ctx_enc )
rahul_dahiya	0:fb8047b156bb	7116	!= MBEDTLS_MODE_CBC )
rahul_dahiya	0:fb8047b156bb	7117	{
rahul_dahiya	0:fb8047b156bb	7118	return( ssl_write_real( ssl, buf, len ) );
rahul_dahiya	0:fb8047b156bb	7119	}
rahul_dahiya	0:fb8047b156bb	7120
rahul_dahiya	0:fb8047b156bb	7121	if( ssl->split_done == 0 )
rahul_dahiya	0:fb8047b156bb	7122	{
rahul_dahiya	0:fb8047b156bb	7123	if( ( ret = ssl_write_real( ssl, buf, 1 ) ) <= 0 )
rahul_dahiya	0:fb8047b156bb	7124	return( ret );
rahul_dahiya	0:fb8047b156bb	7125	ssl->split_done = 1;
rahul_dahiya	0:fb8047b156bb	7126	}
rahul_dahiya	0:fb8047b156bb	7127
rahul_dahiya	0:fb8047b156bb	7128	if( ( ret = ssl_write_real( ssl, buf + 1, len - 1 ) ) <= 0 )
rahul_dahiya	0:fb8047b156bb	7129	return( ret );
rahul_dahiya	0:fb8047b156bb	7130	ssl->split_done = 0;
rahul_dahiya	0:fb8047b156bb	7131
rahul_dahiya	0:fb8047b156bb	7132	return( ret + 1 );
rahul_dahiya	0:fb8047b156bb	7133	}
rahul_dahiya	0:fb8047b156bb	7134	#endif /* MBEDTLS_SSL_CBC_RECORD_SPLITTING */
rahul_dahiya	0:fb8047b156bb	7135
rahul_dahiya	0:fb8047b156bb	7136	/*
rahul_dahiya	0:fb8047b156bb	7137	* Write application data (public-facing wrapper)
rahul_dahiya	0:fb8047b156bb	7138	*/
rahul_dahiya	0:fb8047b156bb	7139	int mbedtls_ssl_write( mbedtls_ssl_context ssl, const unsigned char buf, size_t len )
rahul_dahiya	0:fb8047b156bb	7140	{
rahul_dahiya	0:fb8047b156bb	7141	int ret;
rahul_dahiya	0:fb8047b156bb	7142
rahul_dahiya	0:fb8047b156bb	7143	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write" ) );
rahul_dahiya	0:fb8047b156bb	7144
rahul_dahiya	0:fb8047b156bb	7145	if( ssl == NULL \|\| ssl->conf == NULL )
rahul_dahiya	0:fb8047b156bb	7146	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
rahul_dahiya	0:fb8047b156bb	7147
rahul_dahiya	0:fb8047b156bb	7148	#if defined(MBEDTLS_SSL_RENEGOTIATION)
rahul_dahiya	0:fb8047b156bb	7149	if( ( ret = ssl_check_ctr_renegotiate( ssl ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	7150	{
rahul_dahiya	0:fb8047b156bb	7151	MBEDTLS_SSL_DEBUG_RET( 1, "ssl_check_ctr_renegotiate", ret );
rahul_dahiya	0:fb8047b156bb	7152	return( ret );
rahul_dahiya	0:fb8047b156bb	7153	}
rahul_dahiya	0:fb8047b156bb	7154	#endif
rahul_dahiya	0:fb8047b156bb	7155
rahul_dahiya	0:fb8047b156bb	7156	if( ssl->state != MBEDTLS_SSL_HANDSHAKE_OVER )
rahul_dahiya	0:fb8047b156bb	7157	{
rahul_dahiya	0:fb8047b156bb	7158	if( ( ret = mbedtls_ssl_handshake( ssl ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	7159	{
rahul_dahiya	0:fb8047b156bb	7160	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_handshake", ret );
rahul_dahiya	0:fb8047b156bb	7161	return( ret );
rahul_dahiya	0:fb8047b156bb	7162	}
rahul_dahiya	0:fb8047b156bb	7163	}
rahul_dahiya	0:fb8047b156bb	7164
rahul_dahiya	0:fb8047b156bb	7165	#if defined(MBEDTLS_SSL_CBC_RECORD_SPLITTING)
rahul_dahiya	0:fb8047b156bb	7166	ret = ssl_write_split( ssl, buf, len );
rahul_dahiya	0:fb8047b156bb	7167	#else
rahul_dahiya	0:fb8047b156bb	7168	ret = ssl_write_real( ssl, buf, len );
rahul_dahiya	0:fb8047b156bb	7169	#endif
rahul_dahiya	0:fb8047b156bb	7170
rahul_dahiya	0:fb8047b156bb	7171	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= write" ) );
rahul_dahiya	0:fb8047b156bb	7172
rahul_dahiya	0:fb8047b156bb	7173	return( ret );
rahul_dahiya	0:fb8047b156bb	7174	}
rahul_dahiya	0:fb8047b156bb	7175
rahul_dahiya	0:fb8047b156bb	7176	/*
rahul_dahiya	0:fb8047b156bb	7177	* Notify the peer that the connection is being closed
rahul_dahiya	0:fb8047b156bb	7178	*/
rahul_dahiya	0:fb8047b156bb	7179	int mbedtls_ssl_close_notify( mbedtls_ssl_context *ssl )
rahul_dahiya	0:fb8047b156bb	7180	{
rahul_dahiya	0:fb8047b156bb	7181	int ret;
rahul_dahiya	0:fb8047b156bb	7182
rahul_dahiya	0:fb8047b156bb	7183	if( ssl == NULL \|\| ssl->conf == NULL )
rahul_dahiya	0:fb8047b156bb	7184	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
rahul_dahiya	0:fb8047b156bb	7185
rahul_dahiya	0:fb8047b156bb	7186	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write close notify" ) );
rahul_dahiya	0:fb8047b156bb	7187
rahul_dahiya	0:fb8047b156bb	7188	if( ssl->out_left != 0 )
rahul_dahiya	0:fb8047b156bb	7189	return( mbedtls_ssl_flush_output( ssl ) );
rahul_dahiya	0:fb8047b156bb	7190
rahul_dahiya	0:fb8047b156bb	7191	if( ssl->state == MBEDTLS_SSL_HANDSHAKE_OVER )
rahul_dahiya	0:fb8047b156bb	7192	{
rahul_dahiya	0:fb8047b156bb	7193	if( ( ret = mbedtls_ssl_send_alert_message( ssl,
rahul_dahiya	0:fb8047b156bb	7194	MBEDTLS_SSL_ALERT_LEVEL_WARNING,
rahul_dahiya	0:fb8047b156bb	7195	MBEDTLS_SSL_ALERT_MSG_CLOSE_NOTIFY ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	7196	{
rahul_dahiya	0:fb8047b156bb	7197	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_send_alert_message", ret );
rahul_dahiya	0:fb8047b156bb	7198	return( ret );
rahul_dahiya	0:fb8047b156bb	7199	}
rahul_dahiya	0:fb8047b156bb	7200	}
rahul_dahiya	0:fb8047b156bb	7201
rahul_dahiya	0:fb8047b156bb	7202	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= write close notify" ) );
rahul_dahiya	0:fb8047b156bb	7203
rahul_dahiya	0:fb8047b156bb	7204	return( 0 );
rahul_dahiya	0:fb8047b156bb	7205	}
rahul_dahiya	0:fb8047b156bb	7206
rahul_dahiya	0:fb8047b156bb	7207	void mbedtls_ssl_transform_free( mbedtls_ssl_transform *transform )
rahul_dahiya	0:fb8047b156bb	7208	{
rahul_dahiya	0:fb8047b156bb	7209	if( transform == NULL )
rahul_dahiya	0:fb8047b156bb	7210	return;
rahul_dahiya	0:fb8047b156bb	7211
rahul_dahiya	0:fb8047b156bb	7212	#if defined(MBEDTLS_ZLIB_SUPPORT)
rahul_dahiya	0:fb8047b156bb	7213	deflateEnd( &transform->ctx_deflate );
rahul_dahiya	0:fb8047b156bb	7214	inflateEnd( &transform->ctx_inflate );
rahul_dahiya	0:fb8047b156bb	7215	#endif
rahul_dahiya	0:fb8047b156bb	7216
rahul_dahiya	0:fb8047b156bb	7217	mbedtls_cipher_free( &transform->cipher_ctx_enc );
rahul_dahiya	0:fb8047b156bb	7218	mbedtls_cipher_free( &transform->cipher_ctx_dec );
rahul_dahiya	0:fb8047b156bb	7219
rahul_dahiya	0:fb8047b156bb	7220	mbedtls_md_free( &transform->md_ctx_enc );
rahul_dahiya	0:fb8047b156bb	7221	mbedtls_md_free( &transform->md_ctx_dec );
rahul_dahiya	0:fb8047b156bb	7222
rahul_dahiya	0:fb8047b156bb	7223	mbedtls_zeroize( transform, sizeof( mbedtls_ssl_transform ) );
rahul_dahiya	0:fb8047b156bb	7224	}
rahul_dahiya	0:fb8047b156bb	7225
rahul_dahiya	0:fb8047b156bb	7226	#if defined(MBEDTLS_X509_CRT_PARSE_C)
rahul_dahiya	0:fb8047b156bb	7227	static void ssl_key_cert_free( mbedtls_ssl_key_cert *key_cert )
rahul_dahiya	0:fb8047b156bb	7228	{
rahul_dahiya	0:fb8047b156bb	7229	mbedtls_ssl_key_cert cur = key_cert, next;
rahul_dahiya	0:fb8047b156bb	7230
rahul_dahiya	0:fb8047b156bb	7231	while( cur != NULL )
rahul_dahiya	0:fb8047b156bb	7232	{
rahul_dahiya	0:fb8047b156bb	7233	next = cur->next;
rahul_dahiya	0:fb8047b156bb	7234	mbedtls_free( cur );
rahul_dahiya	0:fb8047b156bb	7235	cur = next;
rahul_dahiya	0:fb8047b156bb	7236	}
rahul_dahiya	0:fb8047b156bb	7237	}
rahul_dahiya	0:fb8047b156bb	7238	#endif /* MBEDTLS_X509_CRT_PARSE_C */
rahul_dahiya	0:fb8047b156bb	7239
rahul_dahiya	0:fb8047b156bb	7240	void mbedtls_ssl_handshake_free( mbedtls_ssl_handshake_params *handshake )
rahul_dahiya	0:fb8047b156bb	7241	{
rahul_dahiya	0:fb8047b156bb	7242	if( handshake == NULL )
rahul_dahiya	0:fb8047b156bb	7243	return;
rahul_dahiya	0:fb8047b156bb	7244
rahul_dahiya	0:fb8047b156bb	7245	#if defined(MBEDTLS_SSL_PROTO_SSL3) \|\| defined(MBEDTLS_SSL_PROTO_TLS1) \|\| \
rahul_dahiya	0:fb8047b156bb	7246	defined(MBEDTLS_SSL_PROTO_TLS1_1)
rahul_dahiya	0:fb8047b156bb	7247	mbedtls_md5_free( &handshake->fin_md5 );
rahul_dahiya	0:fb8047b156bb	7248	mbedtls_sha1_free( &handshake->fin_sha1 );
rahul_dahiya	0:fb8047b156bb	7249	#endif
rahul_dahiya	0:fb8047b156bb	7250	#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
rahul_dahiya	0:fb8047b156bb	7251	#if defined(MBEDTLS_SHA256_C)
rahul_dahiya	0:fb8047b156bb	7252	mbedtls_sha256_free( &handshake->fin_sha256 );
rahul_dahiya	0:fb8047b156bb	7253	#endif
rahul_dahiya	0:fb8047b156bb	7254	#if defined(MBEDTLS_SHA512_C)
rahul_dahiya	0:fb8047b156bb	7255	mbedtls_sha512_free( &handshake->fin_sha512 );
rahul_dahiya	0:fb8047b156bb	7256	#endif
rahul_dahiya	0:fb8047b156bb	7257	#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
rahul_dahiya	0:fb8047b156bb	7258
rahul_dahiya	0:fb8047b156bb	7259	#if defined(MBEDTLS_DHM_C)
rahul_dahiya	0:fb8047b156bb	7260	mbedtls_dhm_free( &handshake->dhm_ctx );
rahul_dahiya	0:fb8047b156bb	7261	#endif
rahul_dahiya	0:fb8047b156bb	7262	#if defined(MBEDTLS_ECDH_C)
rahul_dahiya	0:fb8047b156bb	7263	mbedtls_ecdh_free( &handshake->ecdh_ctx );
rahul_dahiya	0:fb8047b156bb	7264	#endif
rahul_dahiya	0:fb8047b156bb	7265	#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
rahul_dahiya	0:fb8047b156bb	7266	mbedtls_ecjpake_free( &handshake->ecjpake_ctx );
rahul_dahiya	0:fb8047b156bb	7267	#if defined(MBEDTLS_SSL_CLI_C)
rahul_dahiya	0:fb8047b156bb	7268	mbedtls_free( handshake->ecjpake_cache );
rahul_dahiya	0:fb8047b156bb	7269	handshake->ecjpake_cache = NULL;
rahul_dahiya	0:fb8047b156bb	7270	handshake->ecjpake_cache_len = 0;
rahul_dahiya	0:fb8047b156bb	7271	#endif
rahul_dahiya	0:fb8047b156bb	7272	#endif
rahul_dahiya	0:fb8047b156bb	7273
rahul_dahiya	0:fb8047b156bb	7274	#if defined(MBEDTLS_ECDH_C) \|\| defined(MBEDTLS_ECDSA_C) \|\| \
rahul_dahiya	0:fb8047b156bb	7275	defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
rahul_dahiya	0:fb8047b156bb	7276	/* explicit void pointer cast for buggy MS compiler */
rahul_dahiya	0:fb8047b156bb	7277	mbedtls_free( (void *) handshake->curves );
rahul_dahiya	0:fb8047b156bb	7278	#endif
rahul_dahiya	0:fb8047b156bb	7279
rahul_dahiya	0:fb8047b156bb	7280	#if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
rahul_dahiya	0:fb8047b156bb	7281	if( handshake->psk != NULL )
rahul_dahiya	0:fb8047b156bb	7282	{
rahul_dahiya	0:fb8047b156bb	7283	mbedtls_zeroize( handshake->psk, handshake->psk_len );
rahul_dahiya	0:fb8047b156bb	7284	mbedtls_free( handshake->psk );
rahul_dahiya	0:fb8047b156bb	7285	}
rahul_dahiya	0:fb8047b156bb	7286	#endif
rahul_dahiya	0:fb8047b156bb	7287
rahul_dahiya	0:fb8047b156bb	7288	#if defined(MBEDTLS_X509_CRT_PARSE_C) && \
rahul_dahiya	0:fb8047b156bb	7289	defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
rahul_dahiya	0:fb8047b156bb	7290	/*
rahul_dahiya	0:fb8047b156bb	7291	* Free only the linked list wrapper, not the keys themselves
rahul_dahiya	0:fb8047b156bb	7292	* since the belong to the SNI callback
rahul_dahiya	0:fb8047b156bb	7293	*/
rahul_dahiya	0:fb8047b156bb	7294	if( handshake->sni_key_cert != NULL )
rahul_dahiya	0:fb8047b156bb	7295	{
rahul_dahiya	0:fb8047b156bb	7296	mbedtls_ssl_key_cert cur = handshake->sni_key_cert, next;
rahul_dahiya	0:fb8047b156bb	7297
rahul_dahiya	0:fb8047b156bb	7298	while( cur != NULL )
rahul_dahiya	0:fb8047b156bb	7299	{
rahul_dahiya	0:fb8047b156bb	7300	next = cur->next;
rahul_dahiya	0:fb8047b156bb	7301	mbedtls_free( cur );
rahul_dahiya	0:fb8047b156bb	7302	cur = next;
rahul_dahiya	0:fb8047b156bb	7303	}
rahul_dahiya	0:fb8047b156bb	7304	}
rahul_dahiya	0:fb8047b156bb	7305	#endif /* MBEDTLS_X509_CRT_PARSE_C && MBEDTLS_SSL_SERVER_NAME_INDICATION */
rahul_dahiya	0:fb8047b156bb	7306
rahul_dahiya	0:fb8047b156bb	7307	#if defined(MBEDTLS_SSL_PROTO_DTLS)
rahul_dahiya	0:fb8047b156bb	7308	mbedtls_free( handshake->verify_cookie );
rahul_dahiya	0:fb8047b156bb	7309	mbedtls_free( handshake->hs_msg );
rahul_dahiya	0:fb8047b156bb	7310	ssl_flight_free( handshake->flight );
rahul_dahiya	0:fb8047b156bb	7311	#endif
rahul_dahiya	0:fb8047b156bb	7312
rahul_dahiya	0:fb8047b156bb	7313	mbedtls_zeroize( handshake, sizeof( mbedtls_ssl_handshake_params ) );
rahul_dahiya	0:fb8047b156bb	7314	}
rahul_dahiya	0:fb8047b156bb	7315
rahul_dahiya	0:fb8047b156bb	7316	void mbedtls_ssl_session_free( mbedtls_ssl_session *session )
rahul_dahiya	0:fb8047b156bb	7317	{
rahul_dahiya	0:fb8047b156bb	7318	if( session == NULL )
rahul_dahiya	0:fb8047b156bb	7319	return;
rahul_dahiya	0:fb8047b156bb	7320
rahul_dahiya	0:fb8047b156bb	7321	#if defined(MBEDTLS_X509_CRT_PARSE_C)
rahul_dahiya	0:fb8047b156bb	7322	if( session->peer_cert != NULL )
rahul_dahiya	0:fb8047b156bb	7323	{
rahul_dahiya	0:fb8047b156bb	7324	mbedtls_x509_crt_free( session->peer_cert );
rahul_dahiya	0:fb8047b156bb	7325	mbedtls_free( session->peer_cert );
rahul_dahiya	0:fb8047b156bb	7326	}
rahul_dahiya	0:fb8047b156bb	7327	#endif
rahul_dahiya	0:fb8047b156bb	7328
rahul_dahiya	0:fb8047b156bb	7329	#if defined(MBEDTLS_SSL_SESSION_TICKETS) && defined(MBEDTLS_SSL_CLI_C)
rahul_dahiya	0:fb8047b156bb	7330	mbedtls_free( session->ticket );
rahul_dahiya	0:fb8047b156bb	7331	#endif
rahul_dahiya	0:fb8047b156bb	7332
rahul_dahiya	0:fb8047b156bb	7333	mbedtls_zeroize( session, sizeof( mbedtls_ssl_session ) );
rahul_dahiya	0:fb8047b156bb	7334	}
rahul_dahiya	0:fb8047b156bb	7335
rahul_dahiya	0:fb8047b156bb	7336	/*
rahul_dahiya	0:fb8047b156bb	7337	* Free an SSL context
rahul_dahiya	0:fb8047b156bb	7338	*/
rahul_dahiya	0:fb8047b156bb	7339	void mbedtls_ssl_free( mbedtls_ssl_context *ssl )
rahul_dahiya	0:fb8047b156bb	7340	{
rahul_dahiya	0:fb8047b156bb	7341	if( ssl == NULL )
rahul_dahiya	0:fb8047b156bb	7342	return;
rahul_dahiya	0:fb8047b156bb	7343
rahul_dahiya	0:fb8047b156bb	7344	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> free" ) );
rahul_dahiya	0:fb8047b156bb	7345
rahul_dahiya	0:fb8047b156bb	7346	if( ssl->out_buf != NULL )
rahul_dahiya	0:fb8047b156bb	7347	{
rahul_dahiya	0:fb8047b156bb	7348	mbedtls_zeroize( ssl->out_buf, MBEDTLS_SSL_BUFFER_LEN );
rahul_dahiya	0:fb8047b156bb	7349	mbedtls_free( ssl->out_buf );
rahul_dahiya	0:fb8047b156bb	7350	}
rahul_dahiya	0:fb8047b156bb	7351
rahul_dahiya	0:fb8047b156bb	7352	if( ssl->in_buf != NULL )
rahul_dahiya	0:fb8047b156bb	7353	{
rahul_dahiya	0:fb8047b156bb	7354	mbedtls_zeroize( ssl->in_buf, MBEDTLS_SSL_BUFFER_LEN );
rahul_dahiya	0:fb8047b156bb	7355	mbedtls_free( ssl->in_buf );
rahul_dahiya	0:fb8047b156bb	7356	}
rahul_dahiya	0:fb8047b156bb	7357
rahul_dahiya	0:fb8047b156bb	7358	#if defined(MBEDTLS_ZLIB_SUPPORT)
rahul_dahiya	0:fb8047b156bb	7359	if( ssl->compress_buf != NULL )
rahul_dahiya	0:fb8047b156bb	7360	{
rahul_dahiya	0:fb8047b156bb	7361	mbedtls_zeroize( ssl->compress_buf, MBEDTLS_SSL_BUFFER_LEN );
rahul_dahiya	0:fb8047b156bb	7362	mbedtls_free( ssl->compress_buf );
rahul_dahiya	0:fb8047b156bb	7363	}
rahul_dahiya	0:fb8047b156bb	7364	#endif
rahul_dahiya	0:fb8047b156bb	7365
rahul_dahiya	0:fb8047b156bb	7366	if( ssl->transform )
rahul_dahiya	0:fb8047b156bb	7367	{
rahul_dahiya	0:fb8047b156bb	7368	mbedtls_ssl_transform_free( ssl->transform );
rahul_dahiya	0:fb8047b156bb	7369	mbedtls_free( ssl->transform );
rahul_dahiya	0:fb8047b156bb	7370	}
rahul_dahiya	0:fb8047b156bb	7371
rahul_dahiya	0:fb8047b156bb	7372	if( ssl->handshake )
rahul_dahiya	0:fb8047b156bb	7373	{
rahul_dahiya	0:fb8047b156bb	7374	mbedtls_ssl_handshake_free( ssl->handshake );
rahul_dahiya	0:fb8047b156bb	7375	mbedtls_ssl_transform_free( ssl->transform_negotiate );
rahul_dahiya	0:fb8047b156bb	7376	mbedtls_ssl_session_free( ssl->session_negotiate );
rahul_dahiya	0:fb8047b156bb	7377
rahul_dahiya	0:fb8047b156bb	7378	mbedtls_free( ssl->handshake );
rahul_dahiya	0:fb8047b156bb	7379	mbedtls_free( ssl->transform_negotiate );
rahul_dahiya	0:fb8047b156bb	7380	mbedtls_free( ssl->session_negotiate );
rahul_dahiya	0:fb8047b156bb	7381	}
rahul_dahiya	0:fb8047b156bb	7382
rahul_dahiya	0:fb8047b156bb	7383	if( ssl->session )
rahul_dahiya	0:fb8047b156bb	7384	{
rahul_dahiya	0:fb8047b156bb	7385	mbedtls_ssl_session_free( ssl->session );
rahul_dahiya	0:fb8047b156bb	7386	mbedtls_free( ssl->session );
rahul_dahiya	0:fb8047b156bb	7387	}
rahul_dahiya	0:fb8047b156bb	7388
rahul_dahiya	0:fb8047b156bb	7389	#if defined(MBEDTLS_X509_CRT_PARSE_C)
rahul_dahiya	0:fb8047b156bb	7390	if( ssl->hostname != NULL )
rahul_dahiya	0:fb8047b156bb	7391	{
rahul_dahiya	0:fb8047b156bb	7392	mbedtls_zeroize( ssl->hostname, strlen( ssl->hostname ) );
rahul_dahiya	0:fb8047b156bb	7393	mbedtls_free( ssl->hostname );
rahul_dahiya	0:fb8047b156bb	7394	}
rahul_dahiya	0:fb8047b156bb	7395	#endif
rahul_dahiya	0:fb8047b156bb	7396
rahul_dahiya	0:fb8047b156bb	7397	#if defined(MBEDTLS_SSL_HW_RECORD_ACCEL)
rahul_dahiya	0:fb8047b156bb	7398	if( mbedtls_ssl_hw_record_finish != NULL )
rahul_dahiya	0:fb8047b156bb	7399	{
rahul_dahiya	0:fb8047b156bb	7400	MBEDTLS_SSL_DEBUG_MSG( 2, ( "going for mbedtls_ssl_hw_record_finish()" ) );
rahul_dahiya	0:fb8047b156bb	7401	mbedtls_ssl_hw_record_finish( ssl );
rahul_dahiya	0:fb8047b156bb	7402	}
rahul_dahiya	0:fb8047b156bb	7403	#endif
rahul_dahiya	0:fb8047b156bb	7404
rahul_dahiya	0:fb8047b156bb	7405	#if defined(MBEDTLS_SSL_DTLS_HELLO_VERIFY) && defined(MBEDTLS_SSL_SRV_C)
rahul_dahiya	0:fb8047b156bb	7406	mbedtls_free( ssl->cli_id );
rahul_dahiya	0:fb8047b156bb	7407	#endif
rahul_dahiya	0:fb8047b156bb	7408
rahul_dahiya	0:fb8047b156bb	7409	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= free" ) );
rahul_dahiya	0:fb8047b156bb	7410
rahul_dahiya	0:fb8047b156bb	7411	/* Actually clear after last debug message */
rahul_dahiya	0:fb8047b156bb	7412	mbedtls_zeroize( ssl, sizeof( mbedtls_ssl_context ) );
rahul_dahiya	0:fb8047b156bb	7413	}
rahul_dahiya	0:fb8047b156bb	7414
rahul_dahiya	0:fb8047b156bb	7415	/*
rahul_dahiya	0:fb8047b156bb	7416	* Initialze mbedtls_ssl_config
rahul_dahiya	0:fb8047b156bb	7417	*/
rahul_dahiya	0:fb8047b156bb	7418	void mbedtls_ssl_config_init( mbedtls_ssl_config *conf )
rahul_dahiya	0:fb8047b156bb	7419	{
rahul_dahiya	0:fb8047b156bb	7420	memset( conf, 0, sizeof( mbedtls_ssl_config ) );
rahul_dahiya	0:fb8047b156bb	7421	}
rahul_dahiya	0:fb8047b156bb	7422
rahul_dahiya	0:fb8047b156bb	7423	#if defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
rahul_dahiya	0:fb8047b156bb	7424	static int ssl_preset_default_hashes[] = {
rahul_dahiya	0:fb8047b156bb	7425	#if defined(MBEDTLS_SHA512_C)
rahul_dahiya	0:fb8047b156bb	7426	MBEDTLS_MD_SHA512,
rahul_dahiya	0:fb8047b156bb	7427	MBEDTLS_MD_SHA384,
rahul_dahiya	0:fb8047b156bb	7428	#endif
rahul_dahiya	0:fb8047b156bb	7429	#if defined(MBEDTLS_SHA256_C)
rahul_dahiya	0:fb8047b156bb	7430	MBEDTLS_MD_SHA256,
rahul_dahiya	0:fb8047b156bb	7431	MBEDTLS_MD_SHA224,
rahul_dahiya	0:fb8047b156bb	7432	#endif
rahul_dahiya	0:fb8047b156bb	7433	#if defined(MBEDTLS_SHA1_C) && defined(MBEDTLS_TLS_DEFAULT_ALLOW_SHA1_IN_KEY_EXCHANGE)
rahul_dahiya	0:fb8047b156bb	7434	MBEDTLS_MD_SHA1,
rahul_dahiya	0:fb8047b156bb	7435	#endif
rahul_dahiya	0:fb8047b156bb	7436	MBEDTLS_MD_NONE
rahul_dahiya	0:fb8047b156bb	7437	};
rahul_dahiya	0:fb8047b156bb	7438	#endif
rahul_dahiya	0:fb8047b156bb	7439
rahul_dahiya	0:fb8047b156bb	7440	static int ssl_preset_suiteb_ciphersuites[] = {
rahul_dahiya	0:fb8047b156bb	7441	MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
rahul_dahiya	0:fb8047b156bb	7442	MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
rahul_dahiya	0:fb8047b156bb	7443	0
rahul_dahiya	0:fb8047b156bb	7444	};
rahul_dahiya	0:fb8047b156bb	7445
rahul_dahiya	0:fb8047b156bb	7446	#if defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
rahul_dahiya	0:fb8047b156bb	7447	static int ssl_preset_suiteb_hashes[] = {
rahul_dahiya	0:fb8047b156bb	7448	MBEDTLS_MD_SHA256,
rahul_dahiya	0:fb8047b156bb	7449	MBEDTLS_MD_SHA384,
rahul_dahiya	0:fb8047b156bb	7450	MBEDTLS_MD_NONE
rahul_dahiya	0:fb8047b156bb	7451	};
rahul_dahiya	0:fb8047b156bb	7452	#endif
rahul_dahiya	0:fb8047b156bb	7453
rahul_dahiya	0:fb8047b156bb	7454	#if defined(MBEDTLS_ECP_C)
rahul_dahiya	0:fb8047b156bb	7455	static mbedtls_ecp_group_id ssl_preset_suiteb_curves[] = {
rahul_dahiya	0:fb8047b156bb	7456	MBEDTLS_ECP_DP_SECP256R1,
rahul_dahiya	0:fb8047b156bb	7457	MBEDTLS_ECP_DP_SECP384R1,
rahul_dahiya	0:fb8047b156bb	7458	MBEDTLS_ECP_DP_NONE
rahul_dahiya	0:fb8047b156bb	7459	};
rahul_dahiya	0:fb8047b156bb	7460	#endif
rahul_dahiya	0:fb8047b156bb	7461
rahul_dahiya	0:fb8047b156bb	7462	/*
rahul_dahiya	0:fb8047b156bb	7463	* Load default in mbedtls_ssl_config
rahul_dahiya	0:fb8047b156bb	7464	*/
rahul_dahiya	0:fb8047b156bb	7465	int mbedtls_ssl_config_defaults( mbedtls_ssl_config *conf,
rahul_dahiya	0:fb8047b156bb	7466	int endpoint, int transport, int preset )
rahul_dahiya	0:fb8047b156bb	7467	{
rahul_dahiya	0:fb8047b156bb	7468	#if defined(MBEDTLS_DHM_C) && defined(MBEDTLS_SSL_SRV_C)
rahul_dahiya	0:fb8047b156bb	7469	int ret;
rahul_dahiya	0:fb8047b156bb	7470	#endif
rahul_dahiya	0:fb8047b156bb	7471
rahul_dahiya	0:fb8047b156bb	7472	/* Use the functions here so that they are covered in tests,
rahul_dahiya	0:fb8047b156bb	7473	* but otherwise access member directly for efficiency */
rahul_dahiya	0:fb8047b156bb	7474	mbedtls_ssl_conf_endpoint( conf, endpoint );
rahul_dahiya	0:fb8047b156bb	7475	mbedtls_ssl_conf_transport( conf, transport );
rahul_dahiya	0:fb8047b156bb	7476
rahul_dahiya	0:fb8047b156bb	7477	/*
rahul_dahiya	0:fb8047b156bb	7478	* Things that are common to all presets
rahul_dahiya	0:fb8047b156bb	7479	*/
rahul_dahiya	0:fb8047b156bb	7480	#if defined(MBEDTLS_SSL_CLI_C)
rahul_dahiya	0:fb8047b156bb	7481	if( endpoint == MBEDTLS_SSL_IS_CLIENT )
rahul_dahiya	0:fb8047b156bb	7482	{
rahul_dahiya	0:fb8047b156bb	7483	conf->authmode = MBEDTLS_SSL_VERIFY_REQUIRED;
rahul_dahiya	0:fb8047b156bb	7484	#if defined(MBEDTLS_SSL_SESSION_TICKETS)
rahul_dahiya	0:fb8047b156bb	7485	conf->session_tickets = MBEDTLS_SSL_SESSION_TICKETS_ENABLED;
rahul_dahiya	0:fb8047b156bb	7486	#endif
rahul_dahiya	0:fb8047b156bb	7487	}
rahul_dahiya	0:fb8047b156bb	7488	#endif
rahul_dahiya	0:fb8047b156bb	7489
rahul_dahiya	0:fb8047b156bb	7490	#if defined(MBEDTLS_ARC4_C)
rahul_dahiya	0:fb8047b156bb	7491	conf->arc4_disabled = MBEDTLS_SSL_ARC4_DISABLED;
rahul_dahiya	0:fb8047b156bb	7492	#endif
rahul_dahiya	0:fb8047b156bb	7493
rahul_dahiya	0:fb8047b156bb	7494	#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
rahul_dahiya	0:fb8047b156bb	7495	conf->encrypt_then_mac = MBEDTLS_SSL_ETM_ENABLED;
rahul_dahiya	0:fb8047b156bb	7496	#endif
rahul_dahiya	0:fb8047b156bb	7497
rahul_dahiya	0:fb8047b156bb	7498	#if defined(MBEDTLS_SSL_EXTENDED_MASTER_SECRET)
rahul_dahiya	0:fb8047b156bb	7499	conf->extended_ms = MBEDTLS_SSL_EXTENDED_MS_ENABLED;
rahul_dahiya	0:fb8047b156bb	7500	#endif
rahul_dahiya	0:fb8047b156bb	7501
rahul_dahiya	0:fb8047b156bb	7502	#if defined(MBEDTLS_SSL_CBC_RECORD_SPLITTING)
rahul_dahiya	0:fb8047b156bb	7503	conf->cbc_record_splitting = MBEDTLS_SSL_CBC_RECORD_SPLITTING_ENABLED;
rahul_dahiya	0:fb8047b156bb	7504	#endif
rahul_dahiya	0:fb8047b156bb	7505
rahul_dahiya	0:fb8047b156bb	7506	#if defined(MBEDTLS_SSL_DTLS_HELLO_VERIFY) && defined(MBEDTLS_SSL_SRV_C)
rahul_dahiya	0:fb8047b156bb	7507	conf->f_cookie_write = ssl_cookie_write_dummy;
rahul_dahiya	0:fb8047b156bb	7508	conf->f_cookie_check = ssl_cookie_check_dummy;
rahul_dahiya	0:fb8047b156bb	7509	#endif
rahul_dahiya	0:fb8047b156bb	7510
rahul_dahiya	0:fb8047b156bb	7511	#if defined(MBEDTLS_SSL_DTLS_ANTI_REPLAY)
rahul_dahiya	0:fb8047b156bb	7512	conf->anti_replay = MBEDTLS_SSL_ANTI_REPLAY_ENABLED;
rahul_dahiya	0:fb8047b156bb	7513	#endif
rahul_dahiya	0:fb8047b156bb	7514
rahul_dahiya	0:fb8047b156bb	7515	#if defined(MBEDTLS_SSL_SRV_C)
rahul_dahiya	0:fb8047b156bb	7516	conf->cert_req_ca_list = MBEDTLS_SSL_CERT_REQ_CA_LIST_ENABLED;
rahul_dahiya	0:fb8047b156bb	7517	#endif
rahul_dahiya	0:fb8047b156bb	7518
rahul_dahiya	0:fb8047b156bb	7519	#if defined(MBEDTLS_SSL_PROTO_DTLS)
rahul_dahiya	0:fb8047b156bb	7520	conf->hs_timeout_min = MBEDTLS_SSL_DTLS_TIMEOUT_DFL_MIN;
rahul_dahiya	0:fb8047b156bb	7521	conf->hs_timeout_max = MBEDTLS_SSL_DTLS_TIMEOUT_DFL_MAX;
rahul_dahiya	0:fb8047b156bb	7522	#endif
rahul_dahiya	0:fb8047b156bb	7523
rahul_dahiya	0:fb8047b156bb	7524	#if defined(MBEDTLS_SSL_RENEGOTIATION)
rahul_dahiya	0:fb8047b156bb	7525	conf->renego_max_records = MBEDTLS_SSL_RENEGO_MAX_RECORDS_DEFAULT;
rahul_dahiya	0:fb8047b156bb	7526	memset( conf->renego_period, 0x00, 2 );
rahul_dahiya	0:fb8047b156bb	7527	memset( conf->renego_period + 2, 0xFF, 6 );
rahul_dahiya	0:fb8047b156bb	7528	#endif
rahul_dahiya	0:fb8047b156bb	7529
rahul_dahiya	0:fb8047b156bb	7530	#if defined(MBEDTLS_DHM_C) && defined(MBEDTLS_SSL_SRV_C)
rahul_dahiya	0:fb8047b156bb	7531	if( endpoint == MBEDTLS_SSL_IS_SERVER )
rahul_dahiya	0:fb8047b156bb	7532	{
rahul_dahiya	0:fb8047b156bb	7533	if( ( ret = mbedtls_ssl_conf_dh_param( conf,
rahul_dahiya	0:fb8047b156bb	7534	MBEDTLS_DHM_RFC5114_MODP_2048_P,
rahul_dahiya	0:fb8047b156bb	7535	MBEDTLS_DHM_RFC5114_MODP_2048_G ) ) != 0 )
rahul_dahiya	0:fb8047b156bb	7536	{
rahul_dahiya	0:fb8047b156bb	7537	return( ret );
rahul_dahiya	0:fb8047b156bb	7538	}
rahul_dahiya	0:fb8047b156bb	7539	}
rahul_dahiya	0:fb8047b156bb	7540	#endif
rahul_dahiya	0:fb8047b156bb	7541
rahul_dahiya	0:fb8047b156bb	7542	/*
rahul_dahiya	0:fb8047b156bb	7543	* Preset-specific defaults
rahul_dahiya	0:fb8047b156bb	7544	*/
rahul_dahiya	0:fb8047b156bb	7545	switch( preset )
rahul_dahiya	0:fb8047b156bb	7546	{
rahul_dahiya	0:fb8047b156bb	7547	/*
rahul_dahiya	0:fb8047b156bb	7548	* NSA Suite B
rahul_dahiya	0:fb8047b156bb	7549	*/
rahul_dahiya	0:fb8047b156bb	7550	case MBEDTLS_SSL_PRESET_SUITEB:
rahul_dahiya	0:fb8047b156bb	7551	conf->min_major_ver = MBEDTLS_SSL_MAJOR_VERSION_3;
rahul_dahiya	0:fb8047b156bb	7552	conf->min_minor_ver = MBEDTLS_SSL_MINOR_VERSION_3; /* TLS 1.2 */
rahul_dahiya	0:fb8047b156bb	7553	conf->max_major_ver = MBEDTLS_SSL_MAX_MAJOR_VERSION;
rahul_dahiya	0:fb8047b156bb	7554	conf->max_minor_ver = MBEDTLS_SSL_MAX_MINOR_VERSION;
rahul_dahiya	0:fb8047b156bb	7555
rahul_dahiya	0:fb8047b156bb	7556	conf->ciphersuite_list[MBEDTLS_SSL_MINOR_VERSION_0] =
rahul_dahiya	0:fb8047b156bb	7557	conf->ciphersuite_list[MBEDTLS_SSL_MINOR_VERSION_1] =
rahul_dahiya	0:fb8047b156bb	7558	conf->ciphersuite_list[MBEDTLS_SSL_MINOR_VERSION_2] =
rahul_dahiya	0:fb8047b156bb	7559	conf->ciphersuite_list[MBEDTLS_SSL_MINOR_VERSION_3] =
rahul_dahiya	0:fb8047b156bb	7560	ssl_preset_suiteb_ciphersuites;
rahul_dahiya	0:fb8047b156bb	7561
rahul_dahiya	0:fb8047b156bb	7562	#if defined(MBEDTLS_X509_CRT_PARSE_C)
rahul_dahiya	0:fb8047b156bb	7563	conf->cert_profile = &mbedtls_x509_crt_profile_suiteb;
rahul_dahiya	0:fb8047b156bb	7564	#endif
rahul_dahiya	0:fb8047b156bb	7565
rahul_dahiya	0:fb8047b156bb	7566	#if defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
rahul_dahiya	0:fb8047b156bb	7567	conf->sig_hashes = ssl_preset_suiteb_hashes;
rahul_dahiya	0:fb8047b156bb	7568	#endif
rahul_dahiya	0:fb8047b156bb	7569
rahul_dahiya	0:fb8047b156bb	7570	#if defined(MBEDTLS_ECP_C)
rahul_dahiya	0:fb8047b156bb	7571	conf->curve_list = ssl_preset_suiteb_curves;
rahul_dahiya	0:fb8047b156bb	7572	#endif
rahul_dahiya	0:fb8047b156bb	7573	break;
rahul_dahiya	0:fb8047b156bb	7574
rahul_dahiya	0:fb8047b156bb	7575	/*
rahul_dahiya	0:fb8047b156bb	7576	* Default
rahul_dahiya	0:fb8047b156bb	7577	*/
rahul_dahiya	0:fb8047b156bb	7578	default:
rahul_dahiya	0:fb8047b156bb	7579	conf->min_major_ver = MBEDTLS_SSL_MAJOR_VERSION_3;
rahul_dahiya	0:fb8047b156bb	7580	conf->min_minor_ver = MBEDTLS_SSL_MINOR_VERSION_1; /* TLS 1.0 */
rahul_dahiya	0:fb8047b156bb	7581	conf->max_major_ver = MBEDTLS_SSL_MAX_MAJOR_VERSION;
rahul_dahiya	0:fb8047b156bb	7582	conf->max_minor_ver = MBEDTLS_SSL_MAX_MINOR_VERSION;
rahul_dahiya	0:fb8047b156bb	7583
rahul_dahiya	0:fb8047b156bb	7584	#if defined(MBEDTLS_SSL_PROTO_DTLS)
rahul_dahiya	0:fb8047b156bb	7585	if( transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
rahul_dahiya	0:fb8047b156bb	7586	conf->min_minor_ver = MBEDTLS_SSL_MINOR_VERSION_2;
rahul_dahiya	0:fb8047b156bb	7587	#endif
rahul_dahiya	0:fb8047b156bb	7588
rahul_dahiya	0:fb8047b156bb	7589	conf->ciphersuite_list[MBEDTLS_SSL_MINOR_VERSION_0] =
rahul_dahiya	0:fb8047b156bb	7590	conf->ciphersuite_list[MBEDTLS_SSL_MINOR_VERSION_1] =
rahul_dahiya	0:fb8047b156bb	7591	conf->ciphersuite_list[MBEDTLS_SSL_MINOR_VERSION_2] =
rahul_dahiya	0:fb8047b156bb	7592	conf->ciphersuite_list[MBEDTLS_SSL_MINOR_VERSION_3] =
rahul_dahiya	0:fb8047b156bb	7593	mbedtls_ssl_list_ciphersuites();
rahul_dahiya	0:fb8047b156bb	7594
rahul_dahiya	0:fb8047b156bb	7595	#if defined(MBEDTLS_X509_CRT_PARSE_C)
rahul_dahiya	0:fb8047b156bb	7596	conf->cert_profile = &mbedtls_x509_crt_profile_default;
rahul_dahiya	0:fb8047b156bb	7597	#endif
rahul_dahiya	0:fb8047b156bb	7598
rahul_dahiya	0:fb8047b156bb	7599	#if defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
rahul_dahiya	0:fb8047b156bb	7600	conf->sig_hashes = ssl_preset_default_hashes;
rahul_dahiya	0:fb8047b156bb	7601	#endif
rahul_dahiya	0:fb8047b156bb	7602
rahul_dahiya	0:fb8047b156bb	7603	#if defined(MBEDTLS_ECP_C)
rahul_dahiya	0:fb8047b156bb	7604	conf->curve_list = mbedtls_ecp_grp_id_list();
rahul_dahiya	0:fb8047b156bb	7605	#endif
rahul_dahiya	0:fb8047b156bb	7606
rahul_dahiya	0:fb8047b156bb	7607	#if defined(MBEDTLS_DHM_C) && defined(MBEDTLS_SSL_CLI_C)
rahul_dahiya	0:fb8047b156bb	7608	conf->dhm_min_bitlen = 1024;
rahul_dahiya	0:fb8047b156bb	7609	#endif
rahul_dahiya	0:fb8047b156bb	7610	}
rahul_dahiya	0:fb8047b156bb	7611
rahul_dahiya	0:fb8047b156bb	7612	return( 0 );
rahul_dahiya	0:fb8047b156bb	7613	}
rahul_dahiya	0:fb8047b156bb	7614
rahul_dahiya	0:fb8047b156bb	7615	/*
rahul_dahiya	0:fb8047b156bb	7616	* Free mbedtls_ssl_config
rahul_dahiya	0:fb8047b156bb	7617	*/
rahul_dahiya	0:fb8047b156bb	7618	void mbedtls_ssl_config_free( mbedtls_ssl_config *conf )
rahul_dahiya	0:fb8047b156bb	7619	{
rahul_dahiya	0:fb8047b156bb	7620	#if defined(MBEDTLS_DHM_C)
rahul_dahiya	0:fb8047b156bb	7621	mbedtls_mpi_free( &conf->dhm_P );
rahul_dahiya	0:fb8047b156bb	7622	mbedtls_mpi_free( &conf->dhm_G );
rahul_dahiya	0:fb8047b156bb	7623	#endif
rahul_dahiya	0:fb8047b156bb	7624
rahul_dahiya	0:fb8047b156bb	7625	#if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
rahul_dahiya	0:fb8047b156bb	7626	if( conf->psk != NULL )
rahul_dahiya	0:fb8047b156bb	7627	{
rahul_dahiya	0:fb8047b156bb	7628	mbedtls_zeroize( conf->psk, conf->psk_len );
rahul_dahiya	0:fb8047b156bb	7629	mbedtls_zeroize( conf->psk_identity, conf->psk_identity_len );
rahul_dahiya	0:fb8047b156bb	7630	mbedtls_free( conf->psk );
rahul_dahiya	0:fb8047b156bb	7631	mbedtls_free( conf->psk_identity );
rahul_dahiya	0:fb8047b156bb	7632	conf->psk_len = 0;
rahul_dahiya	0:fb8047b156bb	7633	conf->psk_identity_len = 0;
rahul_dahiya	0:fb8047b156bb	7634	}
rahul_dahiya	0:fb8047b156bb	7635	#endif
rahul_dahiya	0:fb8047b156bb	7636
rahul_dahiya	0:fb8047b156bb	7637	#if defined(MBEDTLS_X509_CRT_PARSE_C)
rahul_dahiya	0:fb8047b156bb	7638	ssl_key_cert_free( conf->key_cert );
rahul_dahiya	0:fb8047b156bb	7639	#endif
rahul_dahiya	0:fb8047b156bb	7640
rahul_dahiya	0:fb8047b156bb	7641	mbedtls_zeroize( conf, sizeof( mbedtls_ssl_config ) );
rahul_dahiya	0:fb8047b156bb	7642	}
rahul_dahiya	0:fb8047b156bb	7643
rahul_dahiya	0:fb8047b156bb	7644	#if defined(MBEDTLS_PK_C) && \
rahul_dahiya	0:fb8047b156bb	7645	( defined(MBEDTLS_RSA_C) \|\| defined(MBEDTLS_ECDSA_C) )
rahul_dahiya	0:fb8047b156bb	7646	/*
rahul_dahiya	0:fb8047b156bb	7647	* Convert between MBEDTLS_PK_XXX and SSL_SIG_XXX
rahul_dahiya	0:fb8047b156bb	7648	*/
rahul_dahiya	0:fb8047b156bb	7649	unsigned char mbedtls_ssl_sig_from_pk( mbedtls_pk_context *pk )
rahul_dahiya	0:fb8047b156bb	7650	{
rahul_dahiya	0:fb8047b156bb	7651	#if defined(MBEDTLS_RSA_C)
rahul_dahiya	0:fb8047b156bb	7652	if( mbedtls_pk_can_do( pk, MBEDTLS_PK_RSA ) )
rahul_dahiya	0:fb8047b156bb	7653	return( MBEDTLS_SSL_SIG_RSA );
rahul_dahiya	0:fb8047b156bb	7654	#endif
rahul_dahiya	0:fb8047b156bb	7655	#if defined(MBEDTLS_ECDSA_C)
rahul_dahiya	0:fb8047b156bb	7656	if( mbedtls_pk_can_do( pk, MBEDTLS_PK_ECDSA ) )
rahul_dahiya	0:fb8047b156bb	7657	return( MBEDTLS_SSL_SIG_ECDSA );
rahul_dahiya	0:fb8047b156bb	7658	#endif
rahul_dahiya	0:fb8047b156bb	7659	return( MBEDTLS_SSL_SIG_ANON );
rahul_dahiya	0:fb8047b156bb	7660	}
rahul_dahiya	0:fb8047b156bb	7661
rahul_dahiya	0:fb8047b156bb	7662	unsigned char mbedtls_ssl_sig_from_pk_alg( mbedtls_pk_type_t type )
rahul_dahiya	0:fb8047b156bb	7663	{
rahul_dahiya	0:fb8047b156bb	7664	switch( type ) {
rahul_dahiya	0:fb8047b156bb	7665	case MBEDTLS_PK_RSA:
rahul_dahiya	0:fb8047b156bb	7666	return( MBEDTLS_SSL_SIG_RSA );
rahul_dahiya	0:fb8047b156bb	7667	case MBEDTLS_PK_ECDSA:
rahul_dahiya	0:fb8047b156bb	7668	case MBEDTLS_PK_ECKEY:
rahul_dahiya	0:fb8047b156bb	7669	return( MBEDTLS_SSL_SIG_ECDSA );
rahul_dahiya	0:fb8047b156bb	7670	default:
rahul_dahiya	0:fb8047b156bb	7671	return( MBEDTLS_SSL_SIG_ANON );
rahul_dahiya	0:fb8047b156bb	7672	}
rahul_dahiya	0:fb8047b156bb	7673	}
rahul_dahiya	0:fb8047b156bb	7674
rahul_dahiya	0:fb8047b156bb	7675	mbedtls_pk_type_t mbedtls_ssl_pk_alg_from_sig( unsigned char sig )
rahul_dahiya	0:fb8047b156bb	7676	{
rahul_dahiya	0:fb8047b156bb	7677	switch( sig )
rahul_dahiya	0:fb8047b156bb	7678	{
rahul_dahiya	0:fb8047b156bb	7679	#if defined(MBEDTLS_RSA_C)
rahul_dahiya	0:fb8047b156bb	7680	case MBEDTLS_SSL_SIG_RSA:
rahul_dahiya	0:fb8047b156bb	7681	return( MBEDTLS_PK_RSA );
rahul_dahiya	0:fb8047b156bb	7682	#endif
rahul_dahiya	0:fb8047b156bb	7683	#if defined(MBEDTLS_ECDSA_C)
rahul_dahiya	0:fb8047b156bb	7684	case MBEDTLS_SSL_SIG_ECDSA:
rahul_dahiya	0:fb8047b156bb	7685	return( MBEDTLS_PK_ECDSA );
rahul_dahiya	0:fb8047b156bb	7686	#endif
rahul_dahiya	0:fb8047b156bb	7687	default:
rahul_dahiya	0:fb8047b156bb	7688	return( MBEDTLS_PK_NONE );
rahul_dahiya	0:fb8047b156bb	7689	}
rahul_dahiya	0:fb8047b156bb	7690	}
rahul_dahiya	0:fb8047b156bb	7691	#endif /* MBEDTLS_PK_C && ( MBEDTLS_RSA_C \|\| MBEDTLS_ECDSA_C ) */
rahul_dahiya	0:fb8047b156bb	7692
rahul_dahiya	0:fb8047b156bb	7693	#if defined(MBEDTLS_SSL_PROTO_TLS1_2) && \
rahul_dahiya	0:fb8047b156bb	7694	defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
rahul_dahiya	0:fb8047b156bb	7695
rahul_dahiya	0:fb8047b156bb	7696	/* Find an entry in a signature-hash set matching a given hash algorithm. */
rahul_dahiya	0:fb8047b156bb	7697	mbedtls_md_type_t mbedtls_ssl_sig_hash_set_find( mbedtls_ssl_sig_hash_set_t *set,
rahul_dahiya	0:fb8047b156bb	7698	mbedtls_pk_type_t sig_alg )
rahul_dahiya	0:fb8047b156bb	7699	{
rahul_dahiya	0:fb8047b156bb	7700	switch( sig_alg )
rahul_dahiya	0:fb8047b156bb	7701	{
rahul_dahiya	0:fb8047b156bb	7702	case MBEDTLS_PK_RSA:
rahul_dahiya	0:fb8047b156bb	7703	return( set->rsa );
rahul_dahiya	0:fb8047b156bb	7704	case MBEDTLS_PK_ECDSA:
rahul_dahiya	0:fb8047b156bb	7705	return( set->ecdsa );
rahul_dahiya	0:fb8047b156bb	7706	default:
rahul_dahiya	0:fb8047b156bb	7707	return( MBEDTLS_MD_NONE );
rahul_dahiya	0:fb8047b156bb	7708	}
rahul_dahiya	0:fb8047b156bb	7709	}
rahul_dahiya	0:fb8047b156bb	7710
rahul_dahiya	0:fb8047b156bb	7711	/* Add a signature-hash-pair to a signature-hash set */
rahul_dahiya	0:fb8047b156bb	7712	void mbedtls_ssl_sig_hash_set_add( mbedtls_ssl_sig_hash_set_t *set,
rahul_dahiya	0:fb8047b156bb	7713	mbedtls_pk_type_t sig_alg,
rahul_dahiya	0:fb8047b156bb	7714	mbedtls_md_type_t md_alg )
rahul_dahiya	0:fb8047b156bb	7715	{
rahul_dahiya	0:fb8047b156bb	7716	switch( sig_alg )
rahul_dahiya	0:fb8047b156bb	7717	{
rahul_dahiya	0:fb8047b156bb	7718	case MBEDTLS_PK_RSA:
rahul_dahiya	0:fb8047b156bb	7719	if( set->rsa == MBEDTLS_MD_NONE )
rahul_dahiya	0:fb8047b156bb	7720	set->rsa = md_alg;
rahul_dahiya	0:fb8047b156bb	7721	break;
rahul_dahiya	0:fb8047b156bb	7722
rahul_dahiya	0:fb8047b156bb	7723	case MBEDTLS_PK_ECDSA:
rahul_dahiya	0:fb8047b156bb	7724	if( set->ecdsa == MBEDTLS_MD_NONE )
rahul_dahiya	0:fb8047b156bb	7725	set->ecdsa = md_alg;
rahul_dahiya	0:fb8047b156bb	7726	break;
rahul_dahiya	0:fb8047b156bb	7727
rahul_dahiya	0:fb8047b156bb	7728	default:
rahul_dahiya	0:fb8047b156bb	7729	break;
rahul_dahiya	0:fb8047b156bb	7730	}
rahul_dahiya	0:fb8047b156bb	7731	}
rahul_dahiya	0:fb8047b156bb	7732
rahul_dahiya	0:fb8047b156bb	7733	/* Allow exactly one hash algorithm for each signature. */
rahul_dahiya	0:fb8047b156bb	7734	void mbedtls_ssl_sig_hash_set_const_hash( mbedtls_ssl_sig_hash_set_t *set,
rahul_dahiya	0:fb8047b156bb	7735	mbedtls_md_type_t md_alg )
rahul_dahiya	0:fb8047b156bb	7736	{
rahul_dahiya	0:fb8047b156bb	7737	set->rsa = md_alg;
rahul_dahiya	0:fb8047b156bb	7738	set->ecdsa = md_alg;
rahul_dahiya	0:fb8047b156bb	7739	}
rahul_dahiya	0:fb8047b156bb	7740
rahul_dahiya	0:fb8047b156bb	7741	#endif /* MBEDTLS_SSL_PROTO_TLS1_2) &&
rahul_dahiya	0:fb8047b156bb	7742	MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED */
rahul_dahiya	0:fb8047b156bb	7743
rahul_dahiya	0:fb8047b156bb	7744	/*
rahul_dahiya	0:fb8047b156bb	7745	* Convert from MBEDTLS_SSL_HASH_XXX to MBEDTLS_MD_XXX
rahul_dahiya	0:fb8047b156bb	7746	*/
rahul_dahiya	0:fb8047b156bb	7747	mbedtls_md_type_t mbedtls_ssl_md_alg_from_hash( unsigned char hash )
rahul_dahiya	0:fb8047b156bb	7748	{
rahul_dahiya	0:fb8047b156bb	7749	switch( hash )
rahul_dahiya	0:fb8047b156bb	7750	{
rahul_dahiya	0:fb8047b156bb	7751	#if defined(MBEDTLS_MD5_C)
rahul_dahiya	0:fb8047b156bb	7752	case MBEDTLS_SSL_HASH_MD5:
rahul_dahiya	0:fb8047b156bb	7753	return( MBEDTLS_MD_MD5 );
rahul_dahiya	0:fb8047b156bb	7754	#endif
rahul_dahiya	0:fb8047b156bb	7755	#if defined(MBEDTLS_SHA1_C)
rahul_dahiya	0:fb8047b156bb	7756	case MBEDTLS_SSL_HASH_SHA1:
rahul_dahiya	0:fb8047b156bb	7757	return( MBEDTLS_MD_SHA1 );
rahul_dahiya	0:fb8047b156bb	7758	#endif
rahul_dahiya	0:fb8047b156bb	7759	#if defined(MBEDTLS_SHA256_C)
rahul_dahiya	0:fb8047b156bb	7760	case MBEDTLS_SSL_HASH_SHA224:
rahul_dahiya	0:fb8047b156bb	7761	return( MBEDTLS_MD_SHA224 );
rahul_dahiya	0:fb8047b156bb	7762	case MBEDTLS_SSL_HASH_SHA256:
rahul_dahiya	0:fb8047b156bb	7763	return( MBEDTLS_MD_SHA256 );
rahul_dahiya	0:fb8047b156bb	7764	#endif
rahul_dahiya	0:fb8047b156bb	7765	#if defined(MBEDTLS_SHA512_C)
rahul_dahiya	0:fb8047b156bb	7766	case MBEDTLS_SSL_HASH_SHA384:
rahul_dahiya	0:fb8047b156bb	7767	return( MBEDTLS_MD_SHA384 );
rahul_dahiya	0:fb8047b156bb	7768	case MBEDTLS_SSL_HASH_SHA512:
rahul_dahiya	0:fb8047b156bb	7769	return( MBEDTLS_MD_SHA512 );
rahul_dahiya	0:fb8047b156bb	7770	#endif
rahul_dahiya	0:fb8047b156bb	7771	default:
rahul_dahiya	0:fb8047b156bb	7772	return( MBEDTLS_MD_NONE );
rahul_dahiya	0:fb8047b156bb	7773	}
rahul_dahiya	0:fb8047b156bb	7774	}
rahul_dahiya	0:fb8047b156bb	7775
rahul_dahiya	0:fb8047b156bb	7776	/*
rahul_dahiya	0:fb8047b156bb	7777	* Convert from MBEDTLS_MD_XXX to MBEDTLS_SSL_HASH_XXX
rahul_dahiya	0:fb8047b156bb	7778	*/
rahul_dahiya	0:fb8047b156bb	7779	unsigned char mbedtls_ssl_hash_from_md_alg( int md )
rahul_dahiya	0:fb8047b156bb	7780	{
rahul_dahiya	0:fb8047b156bb	7781	switch( md )
rahul_dahiya	0:fb8047b156bb	7782	{
rahul_dahiya	0:fb8047b156bb	7783	#if defined(MBEDTLS_MD5_C)
rahul_dahiya	0:fb8047b156bb	7784	case MBEDTLS_MD_MD5:
rahul_dahiya	0:fb8047b156bb	7785	return( MBEDTLS_SSL_HASH_MD5 );
rahul_dahiya	0:fb8047b156bb	7786	#endif
rahul_dahiya	0:fb8047b156bb	7787	#if defined(MBEDTLS_SHA1_C)
rahul_dahiya	0:fb8047b156bb	7788	case MBEDTLS_MD_SHA1:
rahul_dahiya	0:fb8047b156bb	7789	return( MBEDTLS_SSL_HASH_SHA1 );
rahul_dahiya	0:fb8047b156bb	7790	#endif
rahul_dahiya	0:fb8047b156bb	7791	#if defined(MBEDTLS_SHA256_C)
rahul_dahiya	0:fb8047b156bb	7792	case MBEDTLS_MD_SHA224:
rahul_dahiya	0:fb8047b156bb	7793	return( MBEDTLS_SSL_HASH_SHA224 );
rahul_dahiya	0:fb8047b156bb	7794	case MBEDTLS_MD_SHA256:
rahul_dahiya	0:fb8047b156bb	7795	return( MBEDTLS_SSL_HASH_SHA256 );
rahul_dahiya	0:fb8047b156bb	7796	#endif
rahul_dahiya	0:fb8047b156bb	7797	#if defined(MBEDTLS_SHA512_C)
rahul_dahiya	0:fb8047b156bb	7798	case MBEDTLS_MD_SHA384:
rahul_dahiya	0:fb8047b156bb	7799	return( MBEDTLS_SSL_HASH_SHA384 );
rahul_dahiya	0:fb8047b156bb	7800	case MBEDTLS_MD_SHA512:
rahul_dahiya	0:fb8047b156bb	7801	return( MBEDTLS_SSL_HASH_SHA512 );
rahul_dahiya	0:fb8047b156bb	7802	#endif
rahul_dahiya	0:fb8047b156bb	7803	default:
rahul_dahiya	0:fb8047b156bb	7804	return( MBEDTLS_SSL_HASH_NONE );
rahul_dahiya	0:fb8047b156bb	7805	}
rahul_dahiya	0:fb8047b156bb	7806	}
rahul_dahiya	0:fb8047b156bb	7807
rahul_dahiya	0:fb8047b156bb	7808	#if defined(MBEDTLS_ECP_C)
rahul_dahiya	0:fb8047b156bb	7809	/*
rahul_dahiya	0:fb8047b156bb	7810	* Check if a curve proposed by the peer is in our list.
rahul_dahiya	0:fb8047b156bb	7811	* Return 0 if we're willing to use it, -1 otherwise.
rahul_dahiya	0:fb8047b156bb	7812	*/
rahul_dahiya	0:fb8047b156bb	7813	int mbedtls_ssl_check_curve( const mbedtls_ssl_context *ssl, mbedtls_ecp_group_id grp_id )
rahul_dahiya	0:fb8047b156bb	7814	{
rahul_dahiya	0:fb8047b156bb	7815	const mbedtls_ecp_group_id *gid;
rahul_dahiya	0:fb8047b156bb	7816
rahul_dahiya	0:fb8047b156bb	7817	if( ssl->conf->curve_list == NULL )
rahul_dahiya	0:fb8047b156bb	7818	return( -1 );
rahul_dahiya	0:fb8047b156bb	7819
rahul_dahiya	0:fb8047b156bb	7820	for( gid = ssl->conf->curve_list; *gid != MBEDTLS_ECP_DP_NONE; gid++ )
rahul_dahiya	0:fb8047b156bb	7821	if( *gid == grp_id )
rahul_dahiya	0:fb8047b156bb	7822	return( 0 );
rahul_dahiya	0:fb8047b156bb	7823
rahul_dahiya	0:fb8047b156bb	7824	return( -1 );
rahul_dahiya	0:fb8047b156bb	7825	}
rahul_dahiya	0:fb8047b156bb	7826	#endif /* MBEDTLS_ECP_C */
rahul_dahiya	0:fb8047b156bb	7827
rahul_dahiya	0:fb8047b156bb	7828	#if defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
rahul_dahiya	0:fb8047b156bb	7829	/*
rahul_dahiya	0:fb8047b156bb	7830	* Check if a hash proposed by the peer is in our list.
rahul_dahiya	0:fb8047b156bb	7831	* Return 0 if we're willing to use it, -1 otherwise.
rahul_dahiya	0:fb8047b156bb	7832	*/
rahul_dahiya	0:fb8047b156bb	7833	int mbedtls_ssl_check_sig_hash( const mbedtls_ssl_context *ssl,
rahul_dahiya	0:fb8047b156bb	7834	mbedtls_md_type_t md )
rahul_dahiya	0:fb8047b156bb	7835	{
rahul_dahiya	0:fb8047b156bb	7836	const int *cur;
rahul_dahiya	0:fb8047b156bb	7837
rahul_dahiya	0:fb8047b156bb	7838	if( ssl->conf->sig_hashes == NULL )
rahul_dahiya	0:fb8047b156bb	7839	return( -1 );
rahul_dahiya	0:fb8047b156bb	7840
rahul_dahiya	0:fb8047b156bb	7841	for( cur = ssl->conf->sig_hashes; *cur != MBEDTLS_MD_NONE; cur++ )
rahul_dahiya	0:fb8047b156bb	7842	if( *cur == (int) md )
rahul_dahiya	0:fb8047b156bb	7843	return( 0 );
rahul_dahiya	0:fb8047b156bb	7844
rahul_dahiya	0:fb8047b156bb	7845	return( -1 );
rahul_dahiya	0:fb8047b156bb	7846	}
rahul_dahiya	0:fb8047b156bb	7847	#endif /* MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED */
rahul_dahiya	0:fb8047b156bb	7848
rahul_dahiya	0:fb8047b156bb	7849	#if defined(MBEDTLS_X509_CRT_PARSE_C)
rahul_dahiya	0:fb8047b156bb	7850	int mbedtls_ssl_check_cert_usage( const mbedtls_x509_crt *cert,
rahul_dahiya	0:fb8047b156bb	7851	const mbedtls_ssl_ciphersuite_t *ciphersuite,
rahul_dahiya	0:fb8047b156bb	7852	int cert_endpoint,
rahul_dahiya	0:fb8047b156bb	7853	uint32_t *flags )
rahul_dahiya	0:fb8047b156bb	7854	{
rahul_dahiya	0:fb8047b156bb	7855	int ret = 0;
rahul_dahiya	0:fb8047b156bb	7856	#if defined(MBEDTLS_X509_CHECK_KEY_USAGE)
rahul_dahiya	0:fb8047b156bb	7857	int usage = 0;
rahul_dahiya	0:fb8047b156bb	7858	#endif
rahul_dahiya	0:fb8047b156bb	7859	#if defined(MBEDTLS_X509_CHECK_EXTENDED_KEY_USAGE)
rahul_dahiya	0:fb8047b156bb	7860	const char *ext_oid;
rahul_dahiya	0:fb8047b156bb	7861	size_t ext_len;
rahul_dahiya	0:fb8047b156bb	7862	#endif
rahul_dahiya	0:fb8047b156bb	7863
rahul_dahiya	0:fb8047b156bb	7864	#if !defined(MBEDTLS_X509_CHECK_KEY_USAGE) && \
rahul_dahiya	0:fb8047b156bb	7865	!defined(MBEDTLS_X509_CHECK_EXTENDED_KEY_USAGE)
rahul_dahiya	0:fb8047b156bb	7866	((void) cert);
rahul_dahiya	0:fb8047b156bb	7867	((void) cert_endpoint);
rahul_dahiya	0:fb8047b156bb	7868	((void) flags);
rahul_dahiya	0:fb8047b156bb	7869	#endif
rahul_dahiya	0:fb8047b156bb	7870
rahul_dahiya	0:fb8047b156bb	7871	#if defined(MBEDTLS_X509_CHECK_KEY_USAGE)
rahul_dahiya	0:fb8047b156bb	7872	if( cert_endpoint == MBEDTLS_SSL_IS_SERVER )
rahul_dahiya	0:fb8047b156bb	7873	{
rahul_dahiya	0:fb8047b156bb	7874	/* Server part of the key exchange */
rahul_dahiya	0:fb8047b156bb	7875	switch( ciphersuite->key_exchange )
rahul_dahiya	0:fb8047b156bb	7876	{
rahul_dahiya	0:fb8047b156bb	7877	case MBEDTLS_KEY_EXCHANGE_RSA:
rahul_dahiya	0:fb8047b156bb	7878	case MBEDTLS_KEY_EXCHANGE_RSA_PSK:
rahul_dahiya	0:fb8047b156bb	7879	usage = MBEDTLS_X509_KU_KEY_ENCIPHERMENT;
rahul_dahiya	0:fb8047b156bb	7880	break;
rahul_dahiya	0:fb8047b156bb	7881
rahul_dahiya	0:fb8047b156bb	7882	case MBEDTLS_KEY_EXCHANGE_DHE_RSA:
rahul_dahiya	0:fb8047b156bb	7883	case MBEDTLS_KEY_EXCHANGE_ECDHE_RSA:
rahul_dahiya	0:fb8047b156bb	7884	case MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA:
rahul_dahiya	0:fb8047b156bb	7885	usage = MBEDTLS_X509_KU_DIGITAL_SIGNATURE;
rahul_dahiya	0:fb8047b156bb	7886	break;
rahul_dahiya	0:fb8047b156bb	7887
rahul_dahiya	0:fb8047b156bb	7888	case MBEDTLS_KEY_EXCHANGE_ECDH_RSA:
rahul_dahiya	0:fb8047b156bb	7889	case MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA:
rahul_dahiya	0:fb8047b156bb	7890	usage = MBEDTLS_X509_KU_KEY_AGREEMENT;
rahul_dahiya	0:fb8047b156bb	7891	break;
rahul_dahiya	0:fb8047b156bb	7892
rahul_dahiya	0:fb8047b156bb	7893	/* Don't use default: we want warnings when adding new values */
rahul_dahiya	0:fb8047b156bb	7894	case MBEDTLS_KEY_EXCHANGE_NONE:
rahul_dahiya	0:fb8047b156bb	7895	case MBEDTLS_KEY_EXCHANGE_PSK:
rahul_dahiya	0:fb8047b156bb	7896	case MBEDTLS_KEY_EXCHANGE_DHE_PSK:
rahul_dahiya	0:fb8047b156bb	7897	case MBEDTLS_KEY_EXCHANGE_ECDHE_PSK:
rahul_dahiya	0:fb8047b156bb	7898	case MBEDTLS_KEY_EXCHANGE_ECJPAKE:
rahul_dahiya	0:fb8047b156bb	7899	usage = 0;
rahul_dahiya	0:fb8047b156bb	7900	}
rahul_dahiya	0:fb8047b156bb	7901	}
rahul_dahiya	0:fb8047b156bb	7902	else
rahul_dahiya	0:fb8047b156bb	7903	{
rahul_dahiya	0:fb8047b156bb	7904	/* Client auth: we only implement rsa_sign and mbedtls_ecdsa_sign for now */
rahul_dahiya	0:fb8047b156bb	7905	usage = MBEDTLS_X509_KU_DIGITAL_SIGNATURE;
rahul_dahiya	0:fb8047b156bb	7906	}
rahul_dahiya	0:fb8047b156bb	7907
rahul_dahiya	0:fb8047b156bb	7908	if( mbedtls_x509_crt_check_key_usage( cert, usage ) != 0 )
rahul_dahiya	0:fb8047b156bb	7909	{
rahul_dahiya	0:fb8047b156bb	7910	*flags \|= MBEDTLS_X509_BADCERT_KEY_USAGE;
rahul_dahiya	0:fb8047b156bb	7911	ret = -1;
rahul_dahiya	0:fb8047b156bb	7912	}
rahul_dahiya	0:fb8047b156bb	7913	#else
rahul_dahiya	0:fb8047b156bb	7914	((void) ciphersuite);
rahul_dahiya	0:fb8047b156bb	7915	#endif /* MBEDTLS_X509_CHECK_KEY_USAGE */
rahul_dahiya	0:fb8047b156bb	7916
rahul_dahiya	0:fb8047b156bb	7917	#if defined(MBEDTLS_X509_CHECK_EXTENDED_KEY_USAGE)
rahul_dahiya	0:fb8047b156bb	7918	if( cert_endpoint == MBEDTLS_SSL_IS_SERVER )
rahul_dahiya	0:fb8047b156bb	7919	{
rahul_dahiya	0:fb8047b156bb	7920	ext_oid = MBEDTLS_OID_SERVER_AUTH;
rahul_dahiya	0:fb8047b156bb	7921	ext_len = MBEDTLS_OID_SIZE( MBEDTLS_OID_SERVER_AUTH );
rahul_dahiya	0:fb8047b156bb	7922	}
rahul_dahiya	0:fb8047b156bb	7923	else
rahul_dahiya	0:fb8047b156bb	7924	{
rahul_dahiya	0:fb8047b156bb	7925	ext_oid = MBEDTLS_OID_CLIENT_AUTH;
rahul_dahiya	0:fb8047b156bb	7926	ext_len = MBEDTLS_OID_SIZE( MBEDTLS_OID_CLIENT_AUTH );
rahul_dahiya	0:fb8047b156bb	7927	}
rahul_dahiya	0:fb8047b156bb	7928
rahul_dahiya	0:fb8047b156bb	7929	if( mbedtls_x509_crt_check_extended_key_usage( cert, ext_oid, ext_len ) != 0 )
rahul_dahiya	0:fb8047b156bb	7930	{
rahul_dahiya	0:fb8047b156bb	7931	*flags \|= MBEDTLS_X509_BADCERT_EXT_KEY_USAGE;
rahul_dahiya	0:fb8047b156bb	7932	ret = -1;
rahul_dahiya	0:fb8047b156bb	7933	}
rahul_dahiya	0:fb8047b156bb	7934	#endif /* MBEDTLS_X509_CHECK_EXTENDED_KEY_USAGE */
rahul_dahiya	0:fb8047b156bb	7935
rahul_dahiya	0:fb8047b156bb	7936	return( ret );
rahul_dahiya	0:fb8047b156bb	7937	}
rahul_dahiya	0:fb8047b156bb	7938	#endif /* MBEDTLS_X509_CRT_PARSE_C */
rahul_dahiya	0:fb8047b156bb	7939
rahul_dahiya	0:fb8047b156bb	7940	/*
rahul_dahiya	0:fb8047b156bb	7941	* Convert version numbers to/from wire format
rahul_dahiya	0:fb8047b156bb	7942	* and, for DTLS, to/from TLS equivalent.
rahul_dahiya	0:fb8047b156bb	7943	*
rahul_dahiya	0:fb8047b156bb	7944	* For TLS this is the identity.
rahul_dahiya	0:fb8047b156bb	7945	* For DTLS, use 1's complement (v -> 255 - v, and then map as follows:
rahul_dahiya	0:fb8047b156bb	7946	* 1.0 <-> 3.2 (DTLS 1.0 is based on TLS 1.1)
rahul_dahiya	0:fb8047b156bb	7947	* 1.x <-> 3.x+1 for x != 0 (DTLS 1.2 based on TLS 1.2)
rahul_dahiya	0:fb8047b156bb	7948	*/
rahul_dahiya	0:fb8047b156bb	7949	void mbedtls_ssl_write_version( int major, int minor, int transport,
rahul_dahiya	0:fb8047b156bb	7950	unsigned char ver[2] )
rahul_dahiya	0:fb8047b156bb	7951	{
rahul_dahiya	0:fb8047b156bb	7952	#if defined(MBEDTLS_SSL_PROTO_DTLS)
rahul_dahiya	0:fb8047b156bb	7953	if( transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
rahul_dahiya	0:fb8047b156bb	7954	{
rahul_dahiya	0:fb8047b156bb	7955	if( minor == MBEDTLS_SSL_MINOR_VERSION_2 )
rahul_dahiya	0:fb8047b156bb	7956	--minor; /* DTLS 1.0 stored as TLS 1.1 internally */
rahul_dahiya	0:fb8047b156bb	7957
rahul_dahiya	0:fb8047b156bb	7958	ver[0] = (unsigned char)( 255 - ( major - 2 ) );
rahul_dahiya	0:fb8047b156bb	7959	ver[1] = (unsigned char)( 255 - ( minor - 1 ) );
rahul_dahiya	0:fb8047b156bb	7960	}
rahul_dahiya	0:fb8047b156bb	7961	else
rahul_dahiya	0:fb8047b156bb	7962	#else
rahul_dahiya	0:fb8047b156bb	7963	((void) transport);
rahul_dahiya	0:fb8047b156bb	7964	#endif
rahul_dahiya	0:fb8047b156bb	7965	{
rahul_dahiya	0:fb8047b156bb	7966	ver[0] = (unsigned char) major;
rahul_dahiya	0:fb8047b156bb	7967	ver[1] = (unsigned char) minor;
rahul_dahiya	0:fb8047b156bb	7968	}
rahul_dahiya	0:fb8047b156bb	7969	}
rahul_dahiya	0:fb8047b156bb	7970
rahul_dahiya	0:fb8047b156bb	7971	void mbedtls_ssl_read_version( int major, int minor, int transport,
rahul_dahiya	0:fb8047b156bb	7972	const unsigned char ver[2] )
rahul_dahiya	0:fb8047b156bb	7973	{
rahul_dahiya	0:fb8047b156bb	7974	#if defined(MBEDTLS_SSL_PROTO_DTLS)
rahul_dahiya	0:fb8047b156bb	7975	if( transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
rahul_dahiya	0:fb8047b156bb	7976	{
rahul_dahiya	0:fb8047b156bb	7977	*major = 255 - ver[0] + 2;
rahul_dahiya	0:fb8047b156bb	7978	*minor = 255 - ver[1] + 1;
rahul_dahiya	0:fb8047b156bb	7979
rahul_dahiya	0:fb8047b156bb	7980	if( *minor == MBEDTLS_SSL_MINOR_VERSION_1 )
rahul_dahiya	0:fb8047b156bb	7981	++minor; / DTLS 1.0 stored as TLS 1.1 internally */
rahul_dahiya	0:fb8047b156bb	7982	}
rahul_dahiya	0:fb8047b156bb	7983	else
rahul_dahiya	0:fb8047b156bb	7984	#else
rahul_dahiya	0:fb8047b156bb	7985	((void) transport);
rahul_dahiya	0:fb8047b156bb	7986	#endif
rahul_dahiya	0:fb8047b156bb	7987	{
rahul_dahiya	0:fb8047b156bb	7988	*major = ver[0];
rahul_dahiya	0:fb8047b156bb	7989	*minor = ver[1];
rahul_dahiya	0:fb8047b156bb	7990	}
rahul_dahiya	0:fb8047b156bb	7991	}
rahul_dahiya	0:fb8047b156bb	7992
rahul_dahiya	0:fb8047b156bb	7993	int mbedtls_ssl_set_calc_verify_md( mbedtls_ssl_context *ssl, int md )
rahul_dahiya	0:fb8047b156bb	7994	{
rahul_dahiya	0:fb8047b156bb	7995	#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
rahul_dahiya	0:fb8047b156bb	7996	if( ssl->minor_ver != MBEDTLS_SSL_MINOR_VERSION_3 )
rahul_dahiya	0:fb8047b156bb	7997	return MBEDTLS_ERR_SSL_INVALID_VERIFY_HASH;
rahul_dahiya	0:fb8047b156bb	7998
rahul_dahiya	0:fb8047b156bb	7999	switch( md )
rahul_dahiya	0:fb8047b156bb	8000	{
rahul_dahiya	0:fb8047b156bb	8001	#if defined(MBEDTLS_SSL_PROTO_TLS1) \|\| defined(MBEDTLS_SSL_PROTO_TLS1_1)
rahul_dahiya	0:fb8047b156bb	8002	#if defined(MBEDTLS_MD5_C)
rahul_dahiya	0:fb8047b156bb	8003	case MBEDTLS_SSL_HASH_MD5:
rahul_dahiya	0:fb8047b156bb	8004	return MBEDTLS_ERR_SSL_INVALID_VERIFY_HASH;
rahul_dahiya	0:fb8047b156bb	8005	#endif
rahul_dahiya	0:fb8047b156bb	8006	#if defined(MBEDTLS_SHA1_C)
rahul_dahiya	0:fb8047b156bb	8007	case MBEDTLS_SSL_HASH_SHA1:
rahul_dahiya	0:fb8047b156bb	8008	ssl->handshake->calc_verify = ssl_calc_verify_tls;
rahul_dahiya	0:fb8047b156bb	8009	break;
rahul_dahiya	0:fb8047b156bb	8010	#endif
rahul_dahiya	0:fb8047b156bb	8011	#endif /* MBEDTLS_SSL_PROTO_TLS1 \|\| MBEDTLS_SSL_PROTO_TLS1_1 */
rahul_dahiya	0:fb8047b156bb	8012	#if defined(MBEDTLS_SHA512_C)
rahul_dahiya	0:fb8047b156bb	8013	case MBEDTLS_SSL_HASH_SHA384:
rahul_dahiya	0:fb8047b156bb	8014	ssl->handshake->calc_verify = ssl_calc_verify_tls_sha384;
rahul_dahiya	0:fb8047b156bb	8015	break;
rahul_dahiya	0:fb8047b156bb	8016	#endif
rahul_dahiya	0:fb8047b156bb	8017	#if defined(MBEDTLS_SHA256_C)
rahul_dahiya	0:fb8047b156bb	8018	case MBEDTLS_SSL_HASH_SHA256:
rahul_dahiya	0:fb8047b156bb	8019	ssl->handshake->calc_verify = ssl_calc_verify_tls_sha256;
rahul_dahiya	0:fb8047b156bb	8020	break;
rahul_dahiya	0:fb8047b156bb	8021	#endif
rahul_dahiya	0:fb8047b156bb	8022	default:
rahul_dahiya	0:fb8047b156bb	8023	return MBEDTLS_ERR_SSL_INVALID_VERIFY_HASH;
rahul_dahiya	0:fb8047b156bb	8024	}
rahul_dahiya	0:fb8047b156bb	8025
rahul_dahiya	0:fb8047b156bb	8026	return 0;
rahul_dahiya	0:fb8047b156bb	8027	#else /* !MBEDTLS_SSL_PROTO_TLS1_2 */
rahul_dahiya	0:fb8047b156bb	8028	(void) ssl;
rahul_dahiya	0:fb8047b156bb	8029	(void) md;
rahul_dahiya	0:fb8047b156bb	8030
rahul_dahiya	0:fb8047b156bb	8031	return MBEDTLS_ERR_SSL_INVALID_VERIFY_HASH;
rahul_dahiya	0:fb8047b156bb	8032	#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
rahul_dahiya	0:fb8047b156bb	8033	}
rahul_dahiya	0:fb8047b156bb	8034
rahul_dahiya	0:fb8047b156bb	8035	#endif /* MBEDTLS_SSL_TLS_C */

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Type:	Library
Created:	15 Jan 2020
Imports:	12
Forks:	0
Commits:	1
Dependents:	0
Dependencies:	0
Followers:	2

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mbed-os/features/mbedtls/src/ssl_tls.c@0:fb8047b156bb, 2020-01-15 (annotated)

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