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features/mbedtls/src/ssl_cli.c@3:1198227e6421, 2016-12-16 (annotated)

Committer:: switches
Date:: Fri Dec 16 16:27:57 2016 +0000
Revision:: 3:1198227e6421
Parent:: 0:5c4d7b2438d3

Changed ADC scale for MAX32625 platforms to 1.2V full scale to match MAX32630 platforms

Who changed what in which revision?

User	Revision	Line number	New contents of line
switches	0:5c4d7b2438d3	1	/*
switches	0:5c4d7b2438d3	2	* SSLv3/TLSv1 client-side functions
switches	0:5c4d7b2438d3	3	*
switches	0:5c4d7b2438d3	4	* Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
switches	0:5c4d7b2438d3	5	* SPDX-License-Identifier: Apache-2.0
switches	0:5c4d7b2438d3	6	*
switches	0:5c4d7b2438d3	7	* Licensed under the Apache License, Version 2.0 (the "License"); you may
switches	0:5c4d7b2438d3	8	* not use this file except in compliance with the License.
switches	0:5c4d7b2438d3	9	* You may obtain a copy of the License at
switches	0:5c4d7b2438d3	10	*
switches	0:5c4d7b2438d3	11	* http://www.apache.org/licenses/LICENSE-2.0
switches	0:5c4d7b2438d3	12	*
switches	0:5c4d7b2438d3	13	* Unless required by applicable law or agreed to in writing, software
switches	0:5c4d7b2438d3	14	* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
switches	0:5c4d7b2438d3	15	* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
switches	0:5c4d7b2438d3	16	* See the License for the specific language governing permissions and
switches	0:5c4d7b2438d3	17	* limitations under the License.
switches	0:5c4d7b2438d3	18	*
switches	0:5c4d7b2438d3	19	* This file is part of mbed TLS (https://tls.mbed.org)
switches	0:5c4d7b2438d3	20	*/
switches	0:5c4d7b2438d3	21
switches	0:5c4d7b2438d3	22	#if !defined(MBEDTLS_CONFIG_FILE)
switches	0:5c4d7b2438d3	23	#include "mbedtls/config.h"
switches	0:5c4d7b2438d3	24	#else
switches	0:5c4d7b2438d3	25	#include MBEDTLS_CONFIG_FILE
switches	0:5c4d7b2438d3	26	#endif
switches	0:5c4d7b2438d3	27
switches	0:5c4d7b2438d3	28	#if defined(MBEDTLS_SSL_CLI_C)
switches	0:5c4d7b2438d3	29
switches	0:5c4d7b2438d3	30	#if defined(MBEDTLS_PLATFORM_C)
switches	0:5c4d7b2438d3	31	#include "mbedtls/platform.h"
switches	0:5c4d7b2438d3	32	#else
switches	0:5c4d7b2438d3	33	#include <stdlib.h>
switches	0:5c4d7b2438d3	34	#define mbedtls_calloc calloc
switches	0:5c4d7b2438d3	35	#define mbedtls_free free
switches	0:5c4d7b2438d3	36	#endif
switches	0:5c4d7b2438d3	37
switches	0:5c4d7b2438d3	38	#include "mbedtls/debug.h"
switches	0:5c4d7b2438d3	39	#include "mbedtls/ssl.h"
switches	0:5c4d7b2438d3	40	#include "mbedtls/ssl_internal.h"
switches	0:5c4d7b2438d3	41
switches	0:5c4d7b2438d3	42	#include <string.h>
switches	0:5c4d7b2438d3	43
switches	0:5c4d7b2438d3	44	#include <stdint.h>
switches	0:5c4d7b2438d3	45
switches	0:5c4d7b2438d3	46	#if defined(MBEDTLS_HAVE_TIME)
switches	0:5c4d7b2438d3	47	#include "mbedtls/platform_time.h"
switches	0:5c4d7b2438d3	48	#endif
switches	0:5c4d7b2438d3	49
switches	0:5c4d7b2438d3	50	#if defined(MBEDTLS_SSL_SESSION_TICKETS)
switches	0:5c4d7b2438d3	51	/* Implementation that should never be optimized out by the compiler */
switches	0:5c4d7b2438d3	52	static void mbedtls_zeroize( void *v, size_t n ) {
switches	0:5c4d7b2438d3	53	volatile unsigned char p = v; while( n-- ) p++ = 0;
switches	0:5c4d7b2438d3	54	}
switches	0:5c4d7b2438d3	55	#endif
switches	0:5c4d7b2438d3	56
switches	0:5c4d7b2438d3	57	#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
switches	0:5c4d7b2438d3	58	static void ssl_write_hostname_ext( mbedtls_ssl_context *ssl,
switches	0:5c4d7b2438d3	59	unsigned char *buf,
switches	0:5c4d7b2438d3	60	size_t *olen )
switches	0:5c4d7b2438d3	61	{
switches	0:5c4d7b2438d3	62	unsigned char *p = buf;
switches	0:5c4d7b2438d3	63	const unsigned char *end = ssl->out_msg + MBEDTLS_SSL_MAX_CONTENT_LEN;
switches	0:5c4d7b2438d3	64	size_t hostname_len;
switches	0:5c4d7b2438d3	65
switches	0:5c4d7b2438d3	66	*olen = 0;
switches	0:5c4d7b2438d3	67
switches	0:5c4d7b2438d3	68	if( ssl->hostname == NULL )
switches	0:5c4d7b2438d3	69	return;
switches	0:5c4d7b2438d3	70
switches	0:5c4d7b2438d3	71	MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello, adding server name extension: %s",
switches	0:5c4d7b2438d3	72	ssl->hostname ) );
switches	0:5c4d7b2438d3	73
switches	0:5c4d7b2438d3	74	hostname_len = strlen( ssl->hostname );
switches	0:5c4d7b2438d3	75
switches	0:5c4d7b2438d3	76	if( end < p \|\| (size_t)( end - p ) < hostname_len + 9 )
switches	0:5c4d7b2438d3	77	{
switches	0:5c4d7b2438d3	78	MBEDTLS_SSL_DEBUG_MSG( 1, ( "buffer too small" ) );
switches	0:5c4d7b2438d3	79	return;
switches	0:5c4d7b2438d3	80	}
switches	0:5c4d7b2438d3	81
switches	0:5c4d7b2438d3	82	/*
switches	0:5c4d7b2438d3	83	* struct {
switches	0:5c4d7b2438d3	84	* NameType name_type;
switches	0:5c4d7b2438d3	85	* select (name_type) {
switches	0:5c4d7b2438d3	86	* case host_name: HostName;
switches	0:5c4d7b2438d3	87	* } name;
switches	0:5c4d7b2438d3	88	* } ServerName;
switches	0:5c4d7b2438d3	89	*
switches	0:5c4d7b2438d3	90	* enum {
switches	0:5c4d7b2438d3	91	* host_name(0), (255)
switches	0:5c4d7b2438d3	92	* } NameType;
switches	0:5c4d7b2438d3	93	*
switches	0:5c4d7b2438d3	94	* opaque HostName<1..2^16-1>;
switches	0:5c4d7b2438d3	95	*
switches	0:5c4d7b2438d3	96	* struct {
switches	0:5c4d7b2438d3	97	* ServerName server_name_list<1..2^16-1>
switches	0:5c4d7b2438d3	98	* } ServerNameList;
switches	0:5c4d7b2438d3	99	*/
switches	0:5c4d7b2438d3	100	*p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_SERVERNAME >> 8 ) & 0xFF );
switches	0:5c4d7b2438d3	101	*p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_SERVERNAME ) & 0xFF );
switches	0:5c4d7b2438d3	102
switches	0:5c4d7b2438d3	103	*p++ = (unsigned char)( ( (hostname_len + 5) >> 8 ) & 0xFF );
switches	0:5c4d7b2438d3	104	*p++ = (unsigned char)( ( (hostname_len + 5) ) & 0xFF );
switches	0:5c4d7b2438d3	105
switches	0:5c4d7b2438d3	106	*p++ = (unsigned char)( ( (hostname_len + 3) >> 8 ) & 0xFF );
switches	0:5c4d7b2438d3	107	*p++ = (unsigned char)( ( (hostname_len + 3) ) & 0xFF );
switches	0:5c4d7b2438d3	108
switches	0:5c4d7b2438d3	109	*p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_SERVERNAME_HOSTNAME ) & 0xFF );
switches	0:5c4d7b2438d3	110	*p++ = (unsigned char)( ( hostname_len >> 8 ) & 0xFF );
switches	0:5c4d7b2438d3	111	*p++ = (unsigned char)( ( hostname_len ) & 0xFF );
switches	0:5c4d7b2438d3	112
switches	0:5c4d7b2438d3	113	memcpy( p, ssl->hostname, hostname_len );
switches	0:5c4d7b2438d3	114
switches	0:5c4d7b2438d3	115	*olen = hostname_len + 9;
switches	0:5c4d7b2438d3	116	}
switches	0:5c4d7b2438d3	117	#endif /* MBEDTLS_SSL_SERVER_NAME_INDICATION */
switches	0:5c4d7b2438d3	118
switches	0:5c4d7b2438d3	119	#if defined(MBEDTLS_SSL_RENEGOTIATION)
switches	0:5c4d7b2438d3	120	static void ssl_write_renegotiation_ext( mbedtls_ssl_context *ssl,
switches	0:5c4d7b2438d3	121	unsigned char *buf,
switches	0:5c4d7b2438d3	122	size_t *olen )
switches	0:5c4d7b2438d3	123	{
switches	0:5c4d7b2438d3	124	unsigned char *p = buf;
switches	0:5c4d7b2438d3	125	const unsigned char *end = ssl->out_msg + MBEDTLS_SSL_MAX_CONTENT_LEN;
switches	0:5c4d7b2438d3	126
switches	0:5c4d7b2438d3	127	*olen = 0;
switches	0:5c4d7b2438d3	128
switches	0:5c4d7b2438d3	129	if( ssl->renego_status != MBEDTLS_SSL_RENEGOTIATION_IN_PROGRESS )
switches	0:5c4d7b2438d3	130	return;
switches	0:5c4d7b2438d3	131
switches	0:5c4d7b2438d3	132	MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello, adding renegotiation extension" ) );
switches	0:5c4d7b2438d3	133
switches	0:5c4d7b2438d3	134	if( end < p \|\| (size_t)( end - p ) < 5 + ssl->verify_data_len )
switches	0:5c4d7b2438d3	135	{
switches	0:5c4d7b2438d3	136	MBEDTLS_SSL_DEBUG_MSG( 1, ( "buffer too small" ) );
switches	0:5c4d7b2438d3	137	return;
switches	0:5c4d7b2438d3	138	}
switches	0:5c4d7b2438d3	139
switches	0:5c4d7b2438d3	140	/*
switches	0:5c4d7b2438d3	141	* Secure renegotiation
switches	0:5c4d7b2438d3	142	*/
switches	0:5c4d7b2438d3	143	*p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_RENEGOTIATION_INFO >> 8 ) & 0xFF );
switches	0:5c4d7b2438d3	144	*p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_RENEGOTIATION_INFO ) & 0xFF );
switches	0:5c4d7b2438d3	145
switches	0:5c4d7b2438d3	146	*p++ = 0x00;
switches	0:5c4d7b2438d3	147	*p++ = ( ssl->verify_data_len + 1 ) & 0xFF;
switches	0:5c4d7b2438d3	148	*p++ = ssl->verify_data_len & 0xFF;
switches	0:5c4d7b2438d3	149
switches	0:5c4d7b2438d3	150	memcpy( p, ssl->own_verify_data, ssl->verify_data_len );
switches	0:5c4d7b2438d3	151
switches	0:5c4d7b2438d3	152	*olen = 5 + ssl->verify_data_len;
switches	0:5c4d7b2438d3	153	}
switches	0:5c4d7b2438d3	154	#endif /* MBEDTLS_SSL_RENEGOTIATION */
switches	0:5c4d7b2438d3	155
switches	0:5c4d7b2438d3	156	/*
switches	0:5c4d7b2438d3	157	* Only if we handle at least one key exchange that needs signatures.
switches	0:5c4d7b2438d3	158	*/
switches	0:5c4d7b2438d3	159	#if defined(MBEDTLS_SSL_PROTO_TLS1_2) && \
switches	0:5c4d7b2438d3	160	defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
switches	0:5c4d7b2438d3	161	static void ssl_write_signature_algorithms_ext( mbedtls_ssl_context *ssl,
switches	0:5c4d7b2438d3	162	unsigned char *buf,
switches	0:5c4d7b2438d3	163	size_t *olen )
switches	0:5c4d7b2438d3	164	{
switches	0:5c4d7b2438d3	165	unsigned char *p = buf;
switches	0:5c4d7b2438d3	166	const unsigned char *end = ssl->out_msg + MBEDTLS_SSL_MAX_CONTENT_LEN;
switches	0:5c4d7b2438d3	167	size_t sig_alg_len = 0;
switches	0:5c4d7b2438d3	168	const int *md;
switches	0:5c4d7b2438d3	169	#if defined(MBEDTLS_RSA_C) \|\| defined(MBEDTLS_ECDSA_C)
switches	0:5c4d7b2438d3	170	unsigned char *sig_alg_list = buf + 6;
switches	0:5c4d7b2438d3	171	#endif
switches	0:5c4d7b2438d3	172
switches	0:5c4d7b2438d3	173	*olen = 0;
switches	0:5c4d7b2438d3	174
switches	0:5c4d7b2438d3	175	if( ssl->conf->max_minor_ver != MBEDTLS_SSL_MINOR_VERSION_3 )
switches	0:5c4d7b2438d3	176	return;
switches	0:5c4d7b2438d3	177
switches	0:5c4d7b2438d3	178	MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello, adding signature_algorithms extension" ) );
switches	0:5c4d7b2438d3	179
switches	0:5c4d7b2438d3	180	for( md = ssl->conf->sig_hashes; *md != MBEDTLS_MD_NONE; md++ )
switches	0:5c4d7b2438d3	181	{
switches	0:5c4d7b2438d3	182	#if defined(MBEDTLS_ECDSA_C)
switches	0:5c4d7b2438d3	183	sig_alg_len += 2;
switches	0:5c4d7b2438d3	184	#endif
switches	0:5c4d7b2438d3	185	#if defined(MBEDTLS_RSA_C)
switches	0:5c4d7b2438d3	186	sig_alg_len += 2;
switches	0:5c4d7b2438d3	187	#endif
switches	0:5c4d7b2438d3	188	}
switches	0:5c4d7b2438d3	189
switches	0:5c4d7b2438d3	190	if( end < p \|\| (size_t)( end - p ) < sig_alg_len + 6 )
switches	0:5c4d7b2438d3	191	{
switches	0:5c4d7b2438d3	192	MBEDTLS_SSL_DEBUG_MSG( 1, ( "buffer too small" ) );
switches	0:5c4d7b2438d3	193	return;
switches	0:5c4d7b2438d3	194	}
switches	0:5c4d7b2438d3	195
switches	0:5c4d7b2438d3	196	/*
switches	0:5c4d7b2438d3	197	* Prepare signature_algorithms extension (TLS 1.2)
switches	0:5c4d7b2438d3	198	*/
switches	0:5c4d7b2438d3	199	sig_alg_len = 0;
switches	0:5c4d7b2438d3	200
switches	0:5c4d7b2438d3	201	for( md = ssl->conf->sig_hashes; *md != MBEDTLS_MD_NONE; md++ )
switches	0:5c4d7b2438d3	202	{
switches	0:5c4d7b2438d3	203	#if defined(MBEDTLS_ECDSA_C)
switches	0:5c4d7b2438d3	204	sig_alg_list[sig_alg_len++] = mbedtls_ssl_hash_from_md_alg( *md );
switches	0:5c4d7b2438d3	205	sig_alg_list[sig_alg_len++] = MBEDTLS_SSL_SIG_ECDSA;
switches	0:5c4d7b2438d3	206	#endif
switches	0:5c4d7b2438d3	207	#if defined(MBEDTLS_RSA_C)
switches	0:5c4d7b2438d3	208	sig_alg_list[sig_alg_len++] = mbedtls_ssl_hash_from_md_alg( *md );
switches	0:5c4d7b2438d3	209	sig_alg_list[sig_alg_len++] = MBEDTLS_SSL_SIG_RSA;
switches	0:5c4d7b2438d3	210	#endif
switches	0:5c4d7b2438d3	211	}
switches	0:5c4d7b2438d3	212
switches	0:5c4d7b2438d3	213	/*
switches	0:5c4d7b2438d3	214	* enum {
switches	0:5c4d7b2438d3	215	* none(0), md5(1), sha1(2), sha224(3), sha256(4), sha384(5),
switches	0:5c4d7b2438d3	216	* sha512(6), (255)
switches	0:5c4d7b2438d3	217	* } HashAlgorithm;
switches	0:5c4d7b2438d3	218	*
switches	0:5c4d7b2438d3	219	* enum { anonymous(0), rsa(1), dsa(2), ecdsa(3), (255) }
switches	0:5c4d7b2438d3	220	* SignatureAlgorithm;
switches	0:5c4d7b2438d3	221	*
switches	0:5c4d7b2438d3	222	* struct {
switches	0:5c4d7b2438d3	223	* HashAlgorithm hash;
switches	0:5c4d7b2438d3	224	* SignatureAlgorithm signature;
switches	0:5c4d7b2438d3	225	* } SignatureAndHashAlgorithm;
switches	0:5c4d7b2438d3	226	*
switches	0:5c4d7b2438d3	227	* SignatureAndHashAlgorithm
switches	0:5c4d7b2438d3	228	* supported_signature_algorithms<2..2^16-2>;
switches	0:5c4d7b2438d3	229	*/
switches	0:5c4d7b2438d3	230	*p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_SIG_ALG >> 8 ) & 0xFF );
switches	0:5c4d7b2438d3	231	*p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_SIG_ALG ) & 0xFF );
switches	0:5c4d7b2438d3	232
switches	0:5c4d7b2438d3	233	*p++ = (unsigned char)( ( ( sig_alg_len + 2 ) >> 8 ) & 0xFF );
switches	0:5c4d7b2438d3	234	*p++ = (unsigned char)( ( ( sig_alg_len + 2 ) ) & 0xFF );
switches	0:5c4d7b2438d3	235
switches	0:5c4d7b2438d3	236	*p++ = (unsigned char)( ( sig_alg_len >> 8 ) & 0xFF );
switches	0:5c4d7b2438d3	237	*p++ = (unsigned char)( ( sig_alg_len ) & 0xFF );
switches	0:5c4d7b2438d3	238
switches	0:5c4d7b2438d3	239	*olen = 6 + sig_alg_len;
switches	0:5c4d7b2438d3	240	}
switches	0:5c4d7b2438d3	241	#endif /* MBEDTLS_SSL_PROTO_TLS1_2 &&
switches	0:5c4d7b2438d3	242	MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED */
switches	0:5c4d7b2438d3	243
switches	0:5c4d7b2438d3	244	#if defined(MBEDTLS_ECDH_C) \|\| defined(MBEDTLS_ECDSA_C) \|\| \
switches	0:5c4d7b2438d3	245	defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
switches	0:5c4d7b2438d3	246	static void ssl_write_supported_elliptic_curves_ext( mbedtls_ssl_context *ssl,
switches	0:5c4d7b2438d3	247	unsigned char *buf,
switches	0:5c4d7b2438d3	248	size_t *olen )
switches	0:5c4d7b2438d3	249	{
switches	0:5c4d7b2438d3	250	unsigned char *p = buf;
switches	0:5c4d7b2438d3	251	const unsigned char *end = ssl->out_msg + MBEDTLS_SSL_MAX_CONTENT_LEN;
switches	0:5c4d7b2438d3	252	unsigned char *elliptic_curve_list = p + 6;
switches	0:5c4d7b2438d3	253	size_t elliptic_curve_len = 0;
switches	0:5c4d7b2438d3	254	const mbedtls_ecp_curve_info *info;
switches	0:5c4d7b2438d3	255	#if defined(MBEDTLS_ECP_C)
switches	0:5c4d7b2438d3	256	const mbedtls_ecp_group_id *grp_id;
switches	0:5c4d7b2438d3	257	#else
switches	0:5c4d7b2438d3	258	((void) ssl);
switches	0:5c4d7b2438d3	259	#endif
switches	0:5c4d7b2438d3	260
switches	0:5c4d7b2438d3	261	*olen = 0;
switches	0:5c4d7b2438d3	262
switches	0:5c4d7b2438d3	263	MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello, adding supported_elliptic_curves extension" ) );
switches	0:5c4d7b2438d3	264
switches	0:5c4d7b2438d3	265	#if defined(MBEDTLS_ECP_C)
switches	0:5c4d7b2438d3	266	for( grp_id = ssl->conf->curve_list; *grp_id != MBEDTLS_ECP_DP_NONE; grp_id++ )
switches	0:5c4d7b2438d3	267	{
switches	0:5c4d7b2438d3	268	info = mbedtls_ecp_curve_info_from_grp_id( *grp_id );
switches	0:5c4d7b2438d3	269	#else
switches	0:5c4d7b2438d3	270	for( info = mbedtls_ecp_curve_list(); info->grp_id != MBEDTLS_ECP_DP_NONE; info++ )
switches	0:5c4d7b2438d3	271	{
switches	0:5c4d7b2438d3	272	#endif
switches	0:5c4d7b2438d3	273	if( info == NULL )
switches	0:5c4d7b2438d3	274	{
switches	0:5c4d7b2438d3	275	MBEDTLS_SSL_DEBUG_MSG( 1, ( "invalid curve in ssl configuration" ) );
switches	0:5c4d7b2438d3	276	return;
switches	0:5c4d7b2438d3	277	}
switches	0:5c4d7b2438d3	278
switches	0:5c4d7b2438d3	279	elliptic_curve_len += 2;
switches	0:5c4d7b2438d3	280	}
switches	0:5c4d7b2438d3	281
switches	0:5c4d7b2438d3	282	if( end < p \|\| (size_t)( end - p ) < 6 + elliptic_curve_len )
switches	0:5c4d7b2438d3	283	{
switches	0:5c4d7b2438d3	284	MBEDTLS_SSL_DEBUG_MSG( 1, ( "buffer too small" ) );
switches	0:5c4d7b2438d3	285	return;
switches	0:5c4d7b2438d3	286	}
switches	0:5c4d7b2438d3	287
switches	0:5c4d7b2438d3	288	elliptic_curve_len = 0;
switches	0:5c4d7b2438d3	289
switches	0:5c4d7b2438d3	290	#if defined(MBEDTLS_ECP_C)
switches	0:5c4d7b2438d3	291	for( grp_id = ssl->conf->curve_list; *grp_id != MBEDTLS_ECP_DP_NONE; grp_id++ )
switches	0:5c4d7b2438d3	292	{
switches	0:5c4d7b2438d3	293	info = mbedtls_ecp_curve_info_from_grp_id( *grp_id );
switches	0:5c4d7b2438d3	294	#else
switches	0:5c4d7b2438d3	295	for( info = mbedtls_ecp_curve_list(); info->grp_id != MBEDTLS_ECP_DP_NONE; info++ )
switches	0:5c4d7b2438d3	296	{
switches	0:5c4d7b2438d3	297	#endif
switches	0:5c4d7b2438d3	298	elliptic_curve_list[elliptic_curve_len++] = info->tls_id >> 8;
switches	0:5c4d7b2438d3	299	elliptic_curve_list[elliptic_curve_len++] = info->tls_id & 0xFF;
switches	0:5c4d7b2438d3	300	}
switches	0:5c4d7b2438d3	301
switches	0:5c4d7b2438d3	302	if( elliptic_curve_len == 0 )
switches	0:5c4d7b2438d3	303	return;
switches	0:5c4d7b2438d3	304
switches	0:5c4d7b2438d3	305	*p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_SUPPORTED_ELLIPTIC_CURVES >> 8 ) & 0xFF );
switches	0:5c4d7b2438d3	306	*p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_SUPPORTED_ELLIPTIC_CURVES ) & 0xFF );
switches	0:5c4d7b2438d3	307
switches	0:5c4d7b2438d3	308	*p++ = (unsigned char)( ( ( elliptic_curve_len + 2 ) >> 8 ) & 0xFF );
switches	0:5c4d7b2438d3	309	*p++ = (unsigned char)( ( ( elliptic_curve_len + 2 ) ) & 0xFF );
switches	0:5c4d7b2438d3	310
switches	0:5c4d7b2438d3	311	*p++ = (unsigned char)( ( ( elliptic_curve_len ) >> 8 ) & 0xFF );
switches	0:5c4d7b2438d3	312	*p++ = (unsigned char)( ( ( elliptic_curve_len ) ) & 0xFF );
switches	0:5c4d7b2438d3	313
switches	0:5c4d7b2438d3	314	*olen = 6 + elliptic_curve_len;
switches	0:5c4d7b2438d3	315	}
switches	0:5c4d7b2438d3	316
switches	0:5c4d7b2438d3	317	static void ssl_write_supported_point_formats_ext( mbedtls_ssl_context *ssl,
switches	0:5c4d7b2438d3	318	unsigned char *buf,
switches	0:5c4d7b2438d3	319	size_t *olen )
switches	0:5c4d7b2438d3	320	{
switches	0:5c4d7b2438d3	321	unsigned char *p = buf;
switches	0:5c4d7b2438d3	322	const unsigned char *end = ssl->out_msg + MBEDTLS_SSL_MAX_CONTENT_LEN;
switches	0:5c4d7b2438d3	323
switches	0:5c4d7b2438d3	324	*olen = 0;
switches	0:5c4d7b2438d3	325
switches	0:5c4d7b2438d3	326	MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello, adding supported_point_formats extension" ) );
switches	0:5c4d7b2438d3	327
switches	0:5c4d7b2438d3	328	if( end < p \|\| (size_t)( end - p ) < 6 )
switches	0:5c4d7b2438d3	329	{
switches	0:5c4d7b2438d3	330	MBEDTLS_SSL_DEBUG_MSG( 1, ( "buffer too small" ) );
switches	0:5c4d7b2438d3	331	return;
switches	0:5c4d7b2438d3	332	}
switches	0:5c4d7b2438d3	333
switches	0:5c4d7b2438d3	334	*p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_SUPPORTED_POINT_FORMATS >> 8 ) & 0xFF );
switches	0:5c4d7b2438d3	335	*p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_SUPPORTED_POINT_FORMATS ) & 0xFF );
switches	0:5c4d7b2438d3	336
switches	0:5c4d7b2438d3	337	*p++ = 0x00;
switches	0:5c4d7b2438d3	338	*p++ = 2;
switches	0:5c4d7b2438d3	339
switches	0:5c4d7b2438d3	340	*p++ = 1;
switches	0:5c4d7b2438d3	341	*p++ = MBEDTLS_ECP_PF_UNCOMPRESSED;
switches	0:5c4d7b2438d3	342
switches	0:5c4d7b2438d3	343	*olen = 6;
switches	0:5c4d7b2438d3	344	}
switches	0:5c4d7b2438d3	345	#endif /* MBEDTLS_ECDH_C \|\| MBEDTLS_ECDSA_C \|\|
switches	0:5c4d7b2438d3	346	MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED */
switches	0:5c4d7b2438d3	347
switches	0:5c4d7b2438d3	348	#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
switches	0:5c4d7b2438d3	349	static void ssl_write_ecjpake_kkpp_ext( mbedtls_ssl_context *ssl,
switches	0:5c4d7b2438d3	350	unsigned char *buf,
switches	0:5c4d7b2438d3	351	size_t *olen )
switches	0:5c4d7b2438d3	352	{
switches	0:5c4d7b2438d3	353	int ret;
switches	0:5c4d7b2438d3	354	unsigned char *p = buf;
switches	0:5c4d7b2438d3	355	const unsigned char *end = ssl->out_msg + MBEDTLS_SSL_MAX_CONTENT_LEN;
switches	0:5c4d7b2438d3	356	size_t kkpp_len;
switches	0:5c4d7b2438d3	357
switches	0:5c4d7b2438d3	358	*olen = 0;
switches	0:5c4d7b2438d3	359
switches	0:5c4d7b2438d3	360	/* Skip costly extension if we can't use EC J-PAKE anyway */
switches	0:5c4d7b2438d3	361	if( mbedtls_ecjpake_check( &ssl->handshake->ecjpake_ctx ) != 0 )
switches	0:5c4d7b2438d3	362	return;
switches	0:5c4d7b2438d3	363
switches	0:5c4d7b2438d3	364	MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello, adding ecjpake_kkpp extension" ) );
switches	0:5c4d7b2438d3	365
switches	0:5c4d7b2438d3	366	if( end - p < 4 )
switches	0:5c4d7b2438d3	367	{
switches	0:5c4d7b2438d3	368	MBEDTLS_SSL_DEBUG_MSG( 1, ( "buffer too small" ) );
switches	0:5c4d7b2438d3	369	return;
switches	0:5c4d7b2438d3	370	}
switches	0:5c4d7b2438d3	371
switches	0:5c4d7b2438d3	372	*p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_ECJPAKE_KKPP >> 8 ) & 0xFF );
switches	0:5c4d7b2438d3	373	*p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_ECJPAKE_KKPP ) & 0xFF );
switches	0:5c4d7b2438d3	374
switches	0:5c4d7b2438d3	375	/*
switches	0:5c4d7b2438d3	376	* We may need to send ClientHello multiple times for Hello verification.
switches	0:5c4d7b2438d3	377	* We don't want to compute fresh values every time (both for performance
switches	0:5c4d7b2438d3	378	* and consistency reasons), so cache the extension content.
switches	0:5c4d7b2438d3	379	*/
switches	0:5c4d7b2438d3	380	if( ssl->handshake->ecjpake_cache == NULL \|\|
switches	0:5c4d7b2438d3	381	ssl->handshake->ecjpake_cache_len == 0 )
switches	0:5c4d7b2438d3	382	{
switches	0:5c4d7b2438d3	383	MBEDTLS_SSL_DEBUG_MSG( 3, ( "generating new ecjpake parameters" ) );
switches	0:5c4d7b2438d3	384
switches	0:5c4d7b2438d3	385	ret = mbedtls_ecjpake_write_round_one( &ssl->handshake->ecjpake_ctx,
switches	0:5c4d7b2438d3	386	p + 2, end - p - 2, &kkpp_len,
switches	0:5c4d7b2438d3	387	ssl->conf->f_rng, ssl->conf->p_rng );
switches	0:5c4d7b2438d3	388	if( ret != 0 )
switches	0:5c4d7b2438d3	389	{
switches	0:5c4d7b2438d3	390	MBEDTLS_SSL_DEBUG_RET( 1 , "mbedtls_ecjpake_write_round_one", ret );
switches	0:5c4d7b2438d3	391	return;
switches	0:5c4d7b2438d3	392	}
switches	0:5c4d7b2438d3	393
switches	0:5c4d7b2438d3	394	ssl->handshake->ecjpake_cache = mbedtls_calloc( 1, kkpp_len );
switches	0:5c4d7b2438d3	395	if( ssl->handshake->ecjpake_cache == NULL )
switches	0:5c4d7b2438d3	396	{
switches	0:5c4d7b2438d3	397	MBEDTLS_SSL_DEBUG_MSG( 1, ( "allocation failed" ) );
switches	0:5c4d7b2438d3	398	return;
switches	0:5c4d7b2438d3	399	}
switches	0:5c4d7b2438d3	400
switches	0:5c4d7b2438d3	401	memcpy( ssl->handshake->ecjpake_cache, p + 2, kkpp_len );
switches	0:5c4d7b2438d3	402	ssl->handshake->ecjpake_cache_len = kkpp_len;
switches	0:5c4d7b2438d3	403	}
switches	0:5c4d7b2438d3	404	else
switches	0:5c4d7b2438d3	405	{
switches	0:5c4d7b2438d3	406	MBEDTLS_SSL_DEBUG_MSG( 3, ( "re-using cached ecjpake parameters" ) );
switches	0:5c4d7b2438d3	407
switches	0:5c4d7b2438d3	408	kkpp_len = ssl->handshake->ecjpake_cache_len;
switches	0:5c4d7b2438d3	409
switches	0:5c4d7b2438d3	410	if( (size_t)( end - p - 2 ) < kkpp_len )
switches	0:5c4d7b2438d3	411	{
switches	0:5c4d7b2438d3	412	MBEDTLS_SSL_DEBUG_MSG( 1, ( "buffer too small" ) );
switches	0:5c4d7b2438d3	413	return;
switches	0:5c4d7b2438d3	414	}
switches	0:5c4d7b2438d3	415
switches	0:5c4d7b2438d3	416	memcpy( p + 2, ssl->handshake->ecjpake_cache, kkpp_len );
switches	0:5c4d7b2438d3	417	}
switches	0:5c4d7b2438d3	418
switches	0:5c4d7b2438d3	419	*p++ = (unsigned char)( ( kkpp_len >> 8 ) & 0xFF );
switches	0:5c4d7b2438d3	420	*p++ = (unsigned char)( ( kkpp_len ) & 0xFF );
switches	0:5c4d7b2438d3	421
switches	0:5c4d7b2438d3	422	*olen = kkpp_len + 4;
switches	0:5c4d7b2438d3	423	}
switches	0:5c4d7b2438d3	424	#endif /* MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED */
switches	0:5c4d7b2438d3	425
switches	0:5c4d7b2438d3	426	#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
switches	0:5c4d7b2438d3	427	static void ssl_write_max_fragment_length_ext( mbedtls_ssl_context *ssl,
switches	0:5c4d7b2438d3	428	unsigned char *buf,
switches	0:5c4d7b2438d3	429	size_t *olen )
switches	0:5c4d7b2438d3	430	{
switches	0:5c4d7b2438d3	431	unsigned char *p = buf;
switches	0:5c4d7b2438d3	432	const unsigned char *end = ssl->out_msg + MBEDTLS_SSL_MAX_CONTENT_LEN;
switches	0:5c4d7b2438d3	433
switches	0:5c4d7b2438d3	434	*olen = 0;
switches	0:5c4d7b2438d3	435
switches	0:5c4d7b2438d3	436	if( ssl->conf->mfl_code == MBEDTLS_SSL_MAX_FRAG_LEN_NONE ) {
switches	0:5c4d7b2438d3	437	return;
switches	0:5c4d7b2438d3	438	}
switches	0:5c4d7b2438d3	439
switches	0:5c4d7b2438d3	440	MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello, adding max_fragment_length extension" ) );
switches	0:5c4d7b2438d3	441
switches	0:5c4d7b2438d3	442	if( end < p \|\| (size_t)( end - p ) < 5 )
switches	0:5c4d7b2438d3	443	{
switches	0:5c4d7b2438d3	444	MBEDTLS_SSL_DEBUG_MSG( 1, ( "buffer too small" ) );
switches	0:5c4d7b2438d3	445	return;
switches	0:5c4d7b2438d3	446	}
switches	0:5c4d7b2438d3	447
switches	0:5c4d7b2438d3	448	*p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_MAX_FRAGMENT_LENGTH >> 8 ) & 0xFF );
switches	0:5c4d7b2438d3	449	*p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_MAX_FRAGMENT_LENGTH ) & 0xFF );
switches	0:5c4d7b2438d3	450
switches	0:5c4d7b2438d3	451	*p++ = 0x00;
switches	0:5c4d7b2438d3	452	*p++ = 1;
switches	0:5c4d7b2438d3	453
switches	0:5c4d7b2438d3	454	*p++ = ssl->conf->mfl_code;
switches	0:5c4d7b2438d3	455
switches	0:5c4d7b2438d3	456	*olen = 5;
switches	0:5c4d7b2438d3	457	}
switches	0:5c4d7b2438d3	458	#endif /* MBEDTLS_SSL_MAX_FRAGMENT_LENGTH */
switches	0:5c4d7b2438d3	459
switches	0:5c4d7b2438d3	460	#if defined(MBEDTLS_SSL_TRUNCATED_HMAC)
switches	0:5c4d7b2438d3	461	static void ssl_write_truncated_hmac_ext( mbedtls_ssl_context *ssl,
switches	0:5c4d7b2438d3	462	unsigned char buf, size_t olen )
switches	0:5c4d7b2438d3	463	{
switches	0:5c4d7b2438d3	464	unsigned char *p = buf;
switches	0:5c4d7b2438d3	465	const unsigned char *end = ssl->out_msg + MBEDTLS_SSL_MAX_CONTENT_LEN;
switches	0:5c4d7b2438d3	466
switches	0:5c4d7b2438d3	467	*olen = 0;
switches	0:5c4d7b2438d3	468
switches	0:5c4d7b2438d3	469	if( ssl->conf->trunc_hmac == MBEDTLS_SSL_TRUNC_HMAC_DISABLED )
switches	0:5c4d7b2438d3	470	{
switches	0:5c4d7b2438d3	471	return;
switches	0:5c4d7b2438d3	472	}
switches	0:5c4d7b2438d3	473
switches	0:5c4d7b2438d3	474	MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello, adding truncated_hmac extension" ) );
switches	0:5c4d7b2438d3	475
switches	0:5c4d7b2438d3	476	if( end < p \|\| (size_t)( end - p ) < 4 )
switches	0:5c4d7b2438d3	477	{
switches	0:5c4d7b2438d3	478	MBEDTLS_SSL_DEBUG_MSG( 1, ( "buffer too small" ) );
switches	0:5c4d7b2438d3	479	return;
switches	0:5c4d7b2438d3	480	}
switches	0:5c4d7b2438d3	481
switches	0:5c4d7b2438d3	482	*p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_TRUNCATED_HMAC >> 8 ) & 0xFF );
switches	0:5c4d7b2438d3	483	*p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_TRUNCATED_HMAC ) & 0xFF );
switches	0:5c4d7b2438d3	484
switches	0:5c4d7b2438d3	485	*p++ = 0x00;
switches	0:5c4d7b2438d3	486	*p++ = 0x00;
switches	0:5c4d7b2438d3	487
switches	0:5c4d7b2438d3	488	*olen = 4;
switches	0:5c4d7b2438d3	489	}
switches	0:5c4d7b2438d3	490	#endif /* MBEDTLS_SSL_TRUNCATED_HMAC */
switches	0:5c4d7b2438d3	491
switches	0:5c4d7b2438d3	492	#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
switches	0:5c4d7b2438d3	493	static void ssl_write_encrypt_then_mac_ext( mbedtls_ssl_context *ssl,
switches	0:5c4d7b2438d3	494	unsigned char buf, size_t olen )
switches	0:5c4d7b2438d3	495	{
switches	0:5c4d7b2438d3	496	unsigned char *p = buf;
switches	0:5c4d7b2438d3	497	const unsigned char *end = ssl->out_msg + MBEDTLS_SSL_MAX_CONTENT_LEN;
switches	0:5c4d7b2438d3	498
switches	0:5c4d7b2438d3	499	*olen = 0;
switches	0:5c4d7b2438d3	500
switches	0:5c4d7b2438d3	501	if( ssl->conf->encrypt_then_mac == MBEDTLS_SSL_ETM_DISABLED \|\|
switches	0:5c4d7b2438d3	502	ssl->conf->max_minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 )
switches	0:5c4d7b2438d3	503	{
switches	0:5c4d7b2438d3	504	return;
switches	0:5c4d7b2438d3	505	}
switches	0:5c4d7b2438d3	506
switches	0:5c4d7b2438d3	507	MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello, adding encrypt_then_mac "
switches	0:5c4d7b2438d3	508	"extension" ) );
switches	0:5c4d7b2438d3	509
switches	0:5c4d7b2438d3	510	if( end < p \|\| (size_t)( end - p ) < 4 )
switches	0:5c4d7b2438d3	511	{
switches	0:5c4d7b2438d3	512	MBEDTLS_SSL_DEBUG_MSG( 1, ( "buffer too small" ) );
switches	0:5c4d7b2438d3	513	return;
switches	0:5c4d7b2438d3	514	}
switches	0:5c4d7b2438d3	515
switches	0:5c4d7b2438d3	516	*p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_ENCRYPT_THEN_MAC >> 8 ) & 0xFF );
switches	0:5c4d7b2438d3	517	*p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_ENCRYPT_THEN_MAC ) & 0xFF );
switches	0:5c4d7b2438d3	518
switches	0:5c4d7b2438d3	519	*p++ = 0x00;
switches	0:5c4d7b2438d3	520	*p++ = 0x00;
switches	0:5c4d7b2438d3	521
switches	0:5c4d7b2438d3	522	*olen = 4;
switches	0:5c4d7b2438d3	523	}
switches	0:5c4d7b2438d3	524	#endif /* MBEDTLS_SSL_ENCRYPT_THEN_MAC */
switches	0:5c4d7b2438d3	525
switches	0:5c4d7b2438d3	526	#if defined(MBEDTLS_SSL_EXTENDED_MASTER_SECRET)
switches	0:5c4d7b2438d3	527	static void ssl_write_extended_ms_ext( mbedtls_ssl_context *ssl,
switches	0:5c4d7b2438d3	528	unsigned char buf, size_t olen )
switches	0:5c4d7b2438d3	529	{
switches	0:5c4d7b2438d3	530	unsigned char *p = buf;
switches	0:5c4d7b2438d3	531	const unsigned char *end = ssl->out_msg + MBEDTLS_SSL_MAX_CONTENT_LEN;
switches	0:5c4d7b2438d3	532
switches	0:5c4d7b2438d3	533	*olen = 0;
switches	0:5c4d7b2438d3	534
switches	0:5c4d7b2438d3	535	if( ssl->conf->extended_ms == MBEDTLS_SSL_EXTENDED_MS_DISABLED \|\|
switches	0:5c4d7b2438d3	536	ssl->conf->max_minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 )
switches	0:5c4d7b2438d3	537	{
switches	0:5c4d7b2438d3	538	return;
switches	0:5c4d7b2438d3	539	}
switches	0:5c4d7b2438d3	540
switches	0:5c4d7b2438d3	541	MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello, adding extended_master_secret "
switches	0:5c4d7b2438d3	542	"extension" ) );
switches	0:5c4d7b2438d3	543
switches	0:5c4d7b2438d3	544	if( end < p \|\| (size_t)( end - p ) < 4 )
switches	0:5c4d7b2438d3	545	{
switches	0:5c4d7b2438d3	546	MBEDTLS_SSL_DEBUG_MSG( 1, ( "buffer too small" ) );
switches	0:5c4d7b2438d3	547	return;
switches	0:5c4d7b2438d3	548	}
switches	0:5c4d7b2438d3	549
switches	0:5c4d7b2438d3	550	*p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_EXTENDED_MASTER_SECRET >> 8 ) & 0xFF );
switches	0:5c4d7b2438d3	551	*p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_EXTENDED_MASTER_SECRET ) & 0xFF );
switches	0:5c4d7b2438d3	552
switches	0:5c4d7b2438d3	553	*p++ = 0x00;
switches	0:5c4d7b2438d3	554	*p++ = 0x00;
switches	0:5c4d7b2438d3	555
switches	0:5c4d7b2438d3	556	*olen = 4;
switches	0:5c4d7b2438d3	557	}
switches	0:5c4d7b2438d3	558	#endif /* MBEDTLS_SSL_EXTENDED_MASTER_SECRET */
switches	0:5c4d7b2438d3	559
switches	0:5c4d7b2438d3	560	#if defined(MBEDTLS_SSL_SESSION_TICKETS)
switches	0:5c4d7b2438d3	561	static void ssl_write_session_ticket_ext( mbedtls_ssl_context *ssl,
switches	0:5c4d7b2438d3	562	unsigned char buf, size_t olen )
switches	0:5c4d7b2438d3	563	{
switches	0:5c4d7b2438d3	564	unsigned char *p = buf;
switches	0:5c4d7b2438d3	565	const unsigned char *end = ssl->out_msg + MBEDTLS_SSL_MAX_CONTENT_LEN;
switches	0:5c4d7b2438d3	566	size_t tlen = ssl->session_negotiate->ticket_len;
switches	0:5c4d7b2438d3	567
switches	0:5c4d7b2438d3	568	*olen = 0;
switches	0:5c4d7b2438d3	569
switches	0:5c4d7b2438d3	570	if( ssl->conf->session_tickets == MBEDTLS_SSL_SESSION_TICKETS_DISABLED )
switches	0:5c4d7b2438d3	571	{
switches	0:5c4d7b2438d3	572	return;
switches	0:5c4d7b2438d3	573	}
switches	0:5c4d7b2438d3	574
switches	0:5c4d7b2438d3	575	MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello, adding session ticket extension" ) );
switches	0:5c4d7b2438d3	576
switches	0:5c4d7b2438d3	577	if( end < p \|\| (size_t)( end - p ) < 4 + tlen )
switches	0:5c4d7b2438d3	578	{
switches	0:5c4d7b2438d3	579	MBEDTLS_SSL_DEBUG_MSG( 1, ( "buffer too small" ) );
switches	0:5c4d7b2438d3	580	return;
switches	0:5c4d7b2438d3	581	}
switches	0:5c4d7b2438d3	582
switches	0:5c4d7b2438d3	583	*p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_SESSION_TICKET >> 8 ) & 0xFF );
switches	0:5c4d7b2438d3	584	*p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_SESSION_TICKET ) & 0xFF );
switches	0:5c4d7b2438d3	585
switches	0:5c4d7b2438d3	586	*p++ = (unsigned char)( ( tlen >> 8 ) & 0xFF );
switches	0:5c4d7b2438d3	587	*p++ = (unsigned char)( ( tlen ) & 0xFF );
switches	0:5c4d7b2438d3	588
switches	0:5c4d7b2438d3	589	*olen = 4;
switches	0:5c4d7b2438d3	590
switches	0:5c4d7b2438d3	591	if( ssl->session_negotiate->ticket == NULL \|\| tlen == 0 )
switches	0:5c4d7b2438d3	592	{
switches	0:5c4d7b2438d3	593	return;
switches	0:5c4d7b2438d3	594	}
switches	0:5c4d7b2438d3	595
switches	0:5c4d7b2438d3	596	MBEDTLS_SSL_DEBUG_MSG( 3, ( "sending session ticket of length %d", tlen ) );
switches	0:5c4d7b2438d3	597
switches	0:5c4d7b2438d3	598	memcpy( p, ssl->session_negotiate->ticket, tlen );
switches	0:5c4d7b2438d3	599
switches	0:5c4d7b2438d3	600	*olen += tlen;
switches	0:5c4d7b2438d3	601	}
switches	0:5c4d7b2438d3	602	#endif /* MBEDTLS_SSL_SESSION_TICKETS */
switches	0:5c4d7b2438d3	603
switches	0:5c4d7b2438d3	604	#if defined(MBEDTLS_SSL_ALPN)
switches	0:5c4d7b2438d3	605	static void ssl_write_alpn_ext( mbedtls_ssl_context *ssl,
switches	0:5c4d7b2438d3	606	unsigned char buf, size_t olen )
switches	0:5c4d7b2438d3	607	{
switches	0:5c4d7b2438d3	608	unsigned char *p = buf;
switches	0:5c4d7b2438d3	609	const unsigned char *end = ssl->out_msg + MBEDTLS_SSL_MAX_CONTENT_LEN;
switches	0:5c4d7b2438d3	610	size_t alpnlen = 0;
switches	0:5c4d7b2438d3	611	const char **cur;
switches	0:5c4d7b2438d3	612
switches	0:5c4d7b2438d3	613	*olen = 0;
switches	0:5c4d7b2438d3	614
switches	0:5c4d7b2438d3	615	if( ssl->conf->alpn_list == NULL )
switches	0:5c4d7b2438d3	616	{
switches	0:5c4d7b2438d3	617	return;
switches	0:5c4d7b2438d3	618	}
switches	0:5c4d7b2438d3	619
switches	0:5c4d7b2438d3	620	MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello, adding alpn extension" ) );
switches	0:5c4d7b2438d3	621
switches	0:5c4d7b2438d3	622	for( cur = ssl->conf->alpn_list; *cur != NULL; cur++ )
switches	0:5c4d7b2438d3	623	alpnlen += (unsigned char)( strlen( *cur ) & 0xFF ) + 1;
switches	0:5c4d7b2438d3	624
switches	0:5c4d7b2438d3	625	if( end < p \|\| (size_t)( end - p ) < 6 + alpnlen )
switches	0:5c4d7b2438d3	626	{
switches	0:5c4d7b2438d3	627	MBEDTLS_SSL_DEBUG_MSG( 1, ( "buffer too small" ) );
switches	0:5c4d7b2438d3	628	return;
switches	0:5c4d7b2438d3	629	}
switches	0:5c4d7b2438d3	630
switches	0:5c4d7b2438d3	631	*p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_ALPN >> 8 ) & 0xFF );
switches	0:5c4d7b2438d3	632	*p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_ALPN ) & 0xFF );
switches	0:5c4d7b2438d3	633
switches	0:5c4d7b2438d3	634	/*
switches	0:5c4d7b2438d3	635	* opaque ProtocolName<1..2^8-1>;
switches	0:5c4d7b2438d3	636	*
switches	0:5c4d7b2438d3	637	* struct {
switches	0:5c4d7b2438d3	638	* ProtocolName protocol_name_list<2..2^16-1>
switches	0:5c4d7b2438d3	639	* } ProtocolNameList;
switches	0:5c4d7b2438d3	640	*/
switches	0:5c4d7b2438d3	641
switches	0:5c4d7b2438d3	642	/* Skip writing extension and list length for now */
switches	0:5c4d7b2438d3	643	p += 4;
switches	0:5c4d7b2438d3	644
switches	0:5c4d7b2438d3	645	for( cur = ssl->conf->alpn_list; *cur != NULL; cur++ )
switches	0:5c4d7b2438d3	646	{
switches	0:5c4d7b2438d3	647	p = (unsigned char)( strlen( cur ) & 0xFF );
switches	0:5c4d7b2438d3	648	memcpy( p + 1, cur, p );
switches	0:5c4d7b2438d3	649	p += 1 + *p;
switches	0:5c4d7b2438d3	650	}
switches	0:5c4d7b2438d3	651
switches	0:5c4d7b2438d3	652	*olen = p - buf;
switches	0:5c4d7b2438d3	653
switches	0:5c4d7b2438d3	654	/* List length = olen - 2 (ext_type) - 2 (ext_len) - 2 (list_len) */
switches	0:5c4d7b2438d3	655	buf[4] = (unsigned char)( ( ( *olen - 6 ) >> 8 ) & 0xFF );
switches	0:5c4d7b2438d3	656	buf[5] = (unsigned char)( ( ( *olen - 6 ) ) & 0xFF );
switches	0:5c4d7b2438d3	657
switches	0:5c4d7b2438d3	658	/* Extension length = olen - 2 (ext_type) - 2 (ext_len) */
switches	0:5c4d7b2438d3	659	buf[2] = (unsigned char)( ( ( *olen - 4 ) >> 8 ) & 0xFF );
switches	0:5c4d7b2438d3	660	buf[3] = (unsigned char)( ( ( *olen - 4 ) ) & 0xFF );
switches	0:5c4d7b2438d3	661	}
switches	0:5c4d7b2438d3	662	#endif /* MBEDTLS_SSL_ALPN */
switches	0:5c4d7b2438d3	663
switches	0:5c4d7b2438d3	664	/*
switches	0:5c4d7b2438d3	665	* Generate random bytes for ClientHello
switches	0:5c4d7b2438d3	666	*/
switches	0:5c4d7b2438d3	667	static int ssl_generate_random( mbedtls_ssl_context *ssl )
switches	0:5c4d7b2438d3	668	{
switches	0:5c4d7b2438d3	669	int ret;
switches	0:5c4d7b2438d3	670	unsigned char *p = ssl->handshake->randbytes;
switches	0:5c4d7b2438d3	671	#if defined(MBEDTLS_HAVE_TIME)
switches	0:5c4d7b2438d3	672	mbedtls_time_t t;
switches	0:5c4d7b2438d3	673	#endif
switches	0:5c4d7b2438d3	674
switches	0:5c4d7b2438d3	675	/*
switches	0:5c4d7b2438d3	676	* When responding to a verify request, MUST reuse random (RFC 6347 4.2.1)
switches	0:5c4d7b2438d3	677	*/
switches	0:5c4d7b2438d3	678	#if defined(MBEDTLS_SSL_PROTO_DTLS)
switches	0:5c4d7b2438d3	679	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM &&
switches	0:5c4d7b2438d3	680	ssl->handshake->verify_cookie != NULL )
switches	0:5c4d7b2438d3	681	{
switches	0:5c4d7b2438d3	682	return( 0 );
switches	0:5c4d7b2438d3	683	}
switches	0:5c4d7b2438d3	684	#endif
switches	0:5c4d7b2438d3	685
switches	0:5c4d7b2438d3	686	#if defined(MBEDTLS_HAVE_TIME)
switches	0:5c4d7b2438d3	687	t = mbedtls_time( NULL );
switches	0:5c4d7b2438d3	688	*p++ = (unsigned char)( t >> 24 );
switches	0:5c4d7b2438d3	689	*p++ = (unsigned char)( t >> 16 );
switches	0:5c4d7b2438d3	690	*p++ = (unsigned char)( t >> 8 );
switches	0:5c4d7b2438d3	691	*p++ = (unsigned char)( t );
switches	0:5c4d7b2438d3	692
switches	0:5c4d7b2438d3	693	MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello, current time: %lu", t ) );
switches	0:5c4d7b2438d3	694	#else
switches	0:5c4d7b2438d3	695	if( ( ret = ssl->conf->f_rng( ssl->conf->p_rng, p, 4 ) ) != 0 )
switches	0:5c4d7b2438d3	696	return( ret );
switches	0:5c4d7b2438d3	697
switches	0:5c4d7b2438d3	698	p += 4;
switches	0:5c4d7b2438d3	699	#endif /* MBEDTLS_HAVE_TIME */
switches	0:5c4d7b2438d3	700
switches	0:5c4d7b2438d3	701	if( ( ret = ssl->conf->f_rng( ssl->conf->p_rng, p, 28 ) ) != 0 )
switches	0:5c4d7b2438d3	702	return( ret );
switches	0:5c4d7b2438d3	703
switches	0:5c4d7b2438d3	704	return( 0 );
switches	0:5c4d7b2438d3	705	}
switches	0:5c4d7b2438d3	706
switches	0:5c4d7b2438d3	707	static int ssl_write_client_hello( mbedtls_ssl_context *ssl )
switches	0:5c4d7b2438d3	708	{
switches	0:5c4d7b2438d3	709	int ret;
switches	0:5c4d7b2438d3	710	size_t i, n, olen, ext_len = 0;
switches	0:5c4d7b2438d3	711	unsigned char *buf;
switches	0:5c4d7b2438d3	712	unsigned char p, q;
switches	0:5c4d7b2438d3	713	unsigned char offer_compress;
switches	0:5c4d7b2438d3	714	const int *ciphersuites;
switches	0:5c4d7b2438d3	715	const mbedtls_ssl_ciphersuite_t *ciphersuite_info;
switches	0:5c4d7b2438d3	716
switches	0:5c4d7b2438d3	717	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write client hello" ) );
switches	0:5c4d7b2438d3	718
switches	0:5c4d7b2438d3	719	if( ssl->conf->f_rng == NULL )
switches	0:5c4d7b2438d3	720	{
switches	0:5c4d7b2438d3	721	MBEDTLS_SSL_DEBUG_MSG( 1, ( "no RNG provided") );
switches	0:5c4d7b2438d3	722	return( MBEDTLS_ERR_SSL_NO_RNG );
switches	0:5c4d7b2438d3	723	}
switches	0:5c4d7b2438d3	724
switches	0:5c4d7b2438d3	725	#if defined(MBEDTLS_SSL_RENEGOTIATION)
switches	0:5c4d7b2438d3	726	if( ssl->renego_status == MBEDTLS_SSL_INITIAL_HANDSHAKE )
switches	0:5c4d7b2438d3	727	#endif
switches	0:5c4d7b2438d3	728	{
switches	0:5c4d7b2438d3	729	ssl->major_ver = ssl->conf->min_major_ver;
switches	0:5c4d7b2438d3	730	ssl->minor_ver = ssl->conf->min_minor_ver;
switches	0:5c4d7b2438d3	731	}
switches	0:5c4d7b2438d3	732
switches	0:5c4d7b2438d3	733	if( ssl->conf->max_major_ver == 0 )
switches	0:5c4d7b2438d3	734	{
switches	0:5c4d7b2438d3	735	MBEDTLS_SSL_DEBUG_MSG( 1, ( "configured max major version is invalid, "
switches	0:5c4d7b2438d3	736	"consider using mbedtls_ssl_config_defaults()" ) );
switches	0:5c4d7b2438d3	737	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
switches	0:5c4d7b2438d3	738	}
switches	0:5c4d7b2438d3	739
switches	0:5c4d7b2438d3	740	/*
switches	0:5c4d7b2438d3	741	* 0 . 0 handshake type
switches	0:5c4d7b2438d3	742	* 1 . 3 handshake length
switches	0:5c4d7b2438d3	743	* 4 . 5 highest version supported
switches	0:5c4d7b2438d3	744	* 6 . 9 current UNIX time
switches	0:5c4d7b2438d3	745	* 10 . 37 random bytes
switches	0:5c4d7b2438d3	746	*/
switches	0:5c4d7b2438d3	747	buf = ssl->out_msg;
switches	0:5c4d7b2438d3	748	p = buf + 4;
switches	0:5c4d7b2438d3	749
switches	0:5c4d7b2438d3	750	mbedtls_ssl_write_version( ssl->conf->max_major_ver, ssl->conf->max_minor_ver,
switches	0:5c4d7b2438d3	751	ssl->conf->transport, p );
switches	0:5c4d7b2438d3	752	p += 2;
switches	0:5c4d7b2438d3	753
switches	0:5c4d7b2438d3	754	MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello, max version: [%d:%d]",
switches	0:5c4d7b2438d3	755	buf[4], buf[5] ) );
switches	0:5c4d7b2438d3	756
switches	0:5c4d7b2438d3	757	if( ( ret = ssl_generate_random( ssl ) ) != 0 )
switches	0:5c4d7b2438d3	758	{
switches	0:5c4d7b2438d3	759	MBEDTLS_SSL_DEBUG_RET( 1, "ssl_generate_random", ret );
switches	0:5c4d7b2438d3	760	return( ret );
switches	0:5c4d7b2438d3	761	}
switches	0:5c4d7b2438d3	762
switches	0:5c4d7b2438d3	763	memcpy( p, ssl->handshake->randbytes, 32 );
switches	0:5c4d7b2438d3	764	MBEDTLS_SSL_DEBUG_BUF( 3, "client hello, random bytes", p, 32 );
switches	0:5c4d7b2438d3	765	p += 32;
switches	0:5c4d7b2438d3	766
switches	0:5c4d7b2438d3	767	/*
switches	0:5c4d7b2438d3	768	* 38 . 38 session id length
switches	0:5c4d7b2438d3	769	* 39 . 39+n session id
switches	0:5c4d7b2438d3	770	* 39+n . 39+n DTLS only: cookie length (1 byte)
switches	0:5c4d7b2438d3	771	* 40+n . .. DTSL only: cookie
switches	0:5c4d7b2438d3	772	* .. . .. ciphersuitelist length (2 bytes)
switches	0:5c4d7b2438d3	773	* .. . .. ciphersuitelist
switches	0:5c4d7b2438d3	774	* .. . .. compression methods length (1 byte)
switches	0:5c4d7b2438d3	775	* .. . .. compression methods
switches	0:5c4d7b2438d3	776	* .. . .. extensions length (2 bytes)
switches	0:5c4d7b2438d3	777	* .. . .. extensions
switches	0:5c4d7b2438d3	778	*/
switches	0:5c4d7b2438d3	779	n = ssl->session_negotiate->id_len;
switches	0:5c4d7b2438d3	780
switches	0:5c4d7b2438d3	781	if( n < 16 \|\| n > 32 \|\|
switches	0:5c4d7b2438d3	782	#if defined(MBEDTLS_SSL_RENEGOTIATION)
switches	0:5c4d7b2438d3	783	ssl->renego_status != MBEDTLS_SSL_INITIAL_HANDSHAKE \|\|
switches	0:5c4d7b2438d3	784	#endif
switches	0:5c4d7b2438d3	785	ssl->handshake->resume == 0 )
switches	0:5c4d7b2438d3	786	{
switches	0:5c4d7b2438d3	787	n = 0;
switches	0:5c4d7b2438d3	788	}
switches	0:5c4d7b2438d3	789
switches	0:5c4d7b2438d3	790	#if defined(MBEDTLS_SSL_SESSION_TICKETS)
switches	0:5c4d7b2438d3	791	/*
switches	0:5c4d7b2438d3	792	* RFC 5077 section 3.4: "When presenting a ticket, the client MAY
switches	0:5c4d7b2438d3	793	* generate and include a Session ID in the TLS ClientHello."
switches	0:5c4d7b2438d3	794	*/
switches	0:5c4d7b2438d3	795	#if defined(MBEDTLS_SSL_RENEGOTIATION)
switches	0:5c4d7b2438d3	796	if( ssl->renego_status == MBEDTLS_SSL_INITIAL_HANDSHAKE )
switches	0:5c4d7b2438d3	797	#endif
switches	0:5c4d7b2438d3	798	{
switches	0:5c4d7b2438d3	799	if( ssl->session_negotiate->ticket != NULL &&
switches	0:5c4d7b2438d3	800	ssl->session_negotiate->ticket_len != 0 )
switches	0:5c4d7b2438d3	801	{
switches	0:5c4d7b2438d3	802	ret = ssl->conf->f_rng( ssl->conf->p_rng, ssl->session_negotiate->id, 32 );
switches	0:5c4d7b2438d3	803
switches	0:5c4d7b2438d3	804	if( ret != 0 )
switches	0:5c4d7b2438d3	805	return( ret );
switches	0:5c4d7b2438d3	806
switches	0:5c4d7b2438d3	807	ssl->session_negotiate->id_len = n = 32;
switches	0:5c4d7b2438d3	808	}
switches	0:5c4d7b2438d3	809	}
switches	0:5c4d7b2438d3	810	#endif /* MBEDTLS_SSL_SESSION_TICKETS */
switches	0:5c4d7b2438d3	811
switches	0:5c4d7b2438d3	812	*p++ = (unsigned char) n;
switches	0:5c4d7b2438d3	813
switches	0:5c4d7b2438d3	814	for( i = 0; i < n; i++ )
switches	0:5c4d7b2438d3	815	*p++ = ssl->session_negotiate->id[i];
switches	0:5c4d7b2438d3	816
switches	0:5c4d7b2438d3	817	MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello, session id len.: %d", n ) );
switches	0:5c4d7b2438d3	818	MBEDTLS_SSL_DEBUG_BUF( 3, "client hello, session id", buf + 39, n );
switches	0:5c4d7b2438d3	819
switches	0:5c4d7b2438d3	820	/*
switches	0:5c4d7b2438d3	821	* DTLS cookie
switches	0:5c4d7b2438d3	822	*/
switches	0:5c4d7b2438d3	823	#if defined(MBEDTLS_SSL_PROTO_DTLS)
switches	0:5c4d7b2438d3	824	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
switches	0:5c4d7b2438d3	825	{
switches	0:5c4d7b2438d3	826	if( ssl->handshake->verify_cookie == NULL )
switches	0:5c4d7b2438d3	827	{
switches	0:5c4d7b2438d3	828	MBEDTLS_SSL_DEBUG_MSG( 3, ( "no verify cookie to send" ) );
switches	0:5c4d7b2438d3	829	*p++ = 0;
switches	0:5c4d7b2438d3	830	}
switches	0:5c4d7b2438d3	831	else
switches	0:5c4d7b2438d3	832	{
switches	0:5c4d7b2438d3	833	MBEDTLS_SSL_DEBUG_BUF( 3, "client hello, cookie",
switches	0:5c4d7b2438d3	834	ssl->handshake->verify_cookie,
switches	0:5c4d7b2438d3	835	ssl->handshake->verify_cookie_len );
switches	0:5c4d7b2438d3	836
switches	0:5c4d7b2438d3	837	*p++ = ssl->handshake->verify_cookie_len;
switches	0:5c4d7b2438d3	838	memcpy( p, ssl->handshake->verify_cookie,
switches	0:5c4d7b2438d3	839	ssl->handshake->verify_cookie_len );
switches	0:5c4d7b2438d3	840	p += ssl->handshake->verify_cookie_len;
switches	0:5c4d7b2438d3	841	}
switches	0:5c4d7b2438d3	842	}
switches	0:5c4d7b2438d3	843	#endif
switches	0:5c4d7b2438d3	844
switches	0:5c4d7b2438d3	845	/*
switches	0:5c4d7b2438d3	846	* Ciphersuite list
switches	0:5c4d7b2438d3	847	*/
switches	0:5c4d7b2438d3	848	ciphersuites = ssl->conf->ciphersuite_list[ssl->minor_ver];
switches	0:5c4d7b2438d3	849
switches	0:5c4d7b2438d3	850	/* Skip writing ciphersuite length for now */
switches	0:5c4d7b2438d3	851	n = 0;
switches	0:5c4d7b2438d3	852	q = p;
switches	0:5c4d7b2438d3	853	p += 2;
switches	0:5c4d7b2438d3	854
switches	0:5c4d7b2438d3	855	for( i = 0; ciphersuites[i] != 0; i++ )
switches	0:5c4d7b2438d3	856	{
switches	0:5c4d7b2438d3	857	ciphersuite_info = mbedtls_ssl_ciphersuite_from_id( ciphersuites[i] );
switches	0:5c4d7b2438d3	858
switches	0:5c4d7b2438d3	859	if( ciphersuite_info == NULL )
switches	0:5c4d7b2438d3	860	continue;
switches	0:5c4d7b2438d3	861
switches	0:5c4d7b2438d3	862	if( ciphersuite_info->min_minor_ver > ssl->conf->max_minor_ver \|\|
switches	0:5c4d7b2438d3	863	ciphersuite_info->max_minor_ver < ssl->conf->min_minor_ver )
switches	0:5c4d7b2438d3	864	continue;
switches	0:5c4d7b2438d3	865
switches	0:5c4d7b2438d3	866	#if defined(MBEDTLS_SSL_PROTO_DTLS)
switches	0:5c4d7b2438d3	867	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM &&
switches	0:5c4d7b2438d3	868	( ciphersuite_info->flags & MBEDTLS_CIPHERSUITE_NODTLS ) )
switches	0:5c4d7b2438d3	869	continue;
switches	0:5c4d7b2438d3	870	#endif
switches	0:5c4d7b2438d3	871
switches	0:5c4d7b2438d3	872	#if defined(MBEDTLS_ARC4_C)
switches	0:5c4d7b2438d3	873	if( ssl->conf->arc4_disabled == MBEDTLS_SSL_ARC4_DISABLED &&
switches	0:5c4d7b2438d3	874	ciphersuite_info->cipher == MBEDTLS_CIPHER_ARC4_128 )
switches	0:5c4d7b2438d3	875	continue;
switches	0:5c4d7b2438d3	876	#endif
switches	0:5c4d7b2438d3	877
switches	0:5c4d7b2438d3	878	#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
switches	0:5c4d7b2438d3	879	if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECJPAKE &&
switches	0:5c4d7b2438d3	880	mbedtls_ecjpake_check( &ssl->handshake->ecjpake_ctx ) != 0 )
switches	0:5c4d7b2438d3	881	continue;
switches	0:5c4d7b2438d3	882	#endif
switches	0:5c4d7b2438d3	883
switches	0:5c4d7b2438d3	884	MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello, add ciphersuite: %04x",
switches	0:5c4d7b2438d3	885	ciphersuites[i] ) );
switches	0:5c4d7b2438d3	886
switches	0:5c4d7b2438d3	887	n++;
switches	0:5c4d7b2438d3	888	*p++ = (unsigned char)( ciphersuites[i] >> 8 );
switches	0:5c4d7b2438d3	889	*p++ = (unsigned char)( ciphersuites[i] );
switches	0:5c4d7b2438d3	890	}
switches	0:5c4d7b2438d3	891
switches	0:5c4d7b2438d3	892	/*
switches	0:5c4d7b2438d3	893	* Add TLS_EMPTY_RENEGOTIATION_INFO_SCSV
switches	0:5c4d7b2438d3	894	*/
switches	0:5c4d7b2438d3	895	#if defined(MBEDTLS_SSL_RENEGOTIATION)
switches	0:5c4d7b2438d3	896	if( ssl->renego_status == MBEDTLS_SSL_INITIAL_HANDSHAKE )
switches	0:5c4d7b2438d3	897	#endif
switches	0:5c4d7b2438d3	898	{
switches	0:5c4d7b2438d3	899	*p++ = (unsigned char)( MBEDTLS_SSL_EMPTY_RENEGOTIATION_INFO >> 8 );
switches	0:5c4d7b2438d3	900	*p++ = (unsigned char)( MBEDTLS_SSL_EMPTY_RENEGOTIATION_INFO );
switches	0:5c4d7b2438d3	901	n++;
switches	0:5c4d7b2438d3	902	}
switches	0:5c4d7b2438d3	903
switches	0:5c4d7b2438d3	904	/* Some versions of OpenSSL don't handle it correctly if not at end */
switches	0:5c4d7b2438d3	905	#if defined(MBEDTLS_SSL_FALLBACK_SCSV)
switches	0:5c4d7b2438d3	906	if( ssl->conf->fallback == MBEDTLS_SSL_IS_FALLBACK )
switches	0:5c4d7b2438d3	907	{
switches	0:5c4d7b2438d3	908	MBEDTLS_SSL_DEBUG_MSG( 3, ( "adding FALLBACK_SCSV" ) );
switches	0:5c4d7b2438d3	909	*p++ = (unsigned char)( MBEDTLS_SSL_FALLBACK_SCSV_VALUE >> 8 );
switches	0:5c4d7b2438d3	910	*p++ = (unsigned char)( MBEDTLS_SSL_FALLBACK_SCSV_VALUE );
switches	0:5c4d7b2438d3	911	n++;
switches	0:5c4d7b2438d3	912	}
switches	0:5c4d7b2438d3	913	#endif
switches	0:5c4d7b2438d3	914
switches	0:5c4d7b2438d3	915	*q++ = (unsigned char)( n >> 7 );
switches	0:5c4d7b2438d3	916	*q++ = (unsigned char)( n << 1 );
switches	0:5c4d7b2438d3	917
switches	0:5c4d7b2438d3	918	MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello, got %d ciphersuites", n ) );
switches	0:5c4d7b2438d3	919
switches	0:5c4d7b2438d3	920	#if defined(MBEDTLS_ZLIB_SUPPORT)
switches	0:5c4d7b2438d3	921	offer_compress = 1;
switches	0:5c4d7b2438d3	922	#else
switches	0:5c4d7b2438d3	923	offer_compress = 0;
switches	0:5c4d7b2438d3	924	#endif
switches	0:5c4d7b2438d3	925
switches	0:5c4d7b2438d3	926	/*
switches	0:5c4d7b2438d3	927	* We don't support compression with DTLS right now: is many records come
switches	0:5c4d7b2438d3	928	* in the same datagram, uncompressing one could overwrite the next one.
switches	0:5c4d7b2438d3	929	* We don't want to add complexity for handling that case unless there is
switches	0:5c4d7b2438d3	930	* an actual need for it.
switches	0:5c4d7b2438d3	931	*/
switches	0:5c4d7b2438d3	932	#if defined(MBEDTLS_SSL_PROTO_DTLS)
switches	0:5c4d7b2438d3	933	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
switches	0:5c4d7b2438d3	934	offer_compress = 0;
switches	0:5c4d7b2438d3	935	#endif
switches	0:5c4d7b2438d3	936
switches	0:5c4d7b2438d3	937	if( offer_compress )
switches	0:5c4d7b2438d3	938	{
switches	0:5c4d7b2438d3	939	MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello, compress len.: %d", 2 ) );
switches	0:5c4d7b2438d3	940	MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello, compress alg.: %d %d",
switches	0:5c4d7b2438d3	941	MBEDTLS_SSL_COMPRESS_DEFLATE, MBEDTLS_SSL_COMPRESS_NULL ) );
switches	0:5c4d7b2438d3	942
switches	0:5c4d7b2438d3	943	*p++ = 2;
switches	0:5c4d7b2438d3	944	*p++ = MBEDTLS_SSL_COMPRESS_DEFLATE;
switches	0:5c4d7b2438d3	945	*p++ = MBEDTLS_SSL_COMPRESS_NULL;
switches	0:5c4d7b2438d3	946	}
switches	0:5c4d7b2438d3	947	else
switches	0:5c4d7b2438d3	948	{
switches	0:5c4d7b2438d3	949	MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello, compress len.: %d", 1 ) );
switches	0:5c4d7b2438d3	950	MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello, compress alg.: %d",
switches	0:5c4d7b2438d3	951	MBEDTLS_SSL_COMPRESS_NULL ) );
switches	0:5c4d7b2438d3	952
switches	0:5c4d7b2438d3	953	*p++ = 1;
switches	0:5c4d7b2438d3	954	*p++ = MBEDTLS_SSL_COMPRESS_NULL;
switches	0:5c4d7b2438d3	955	}
switches	0:5c4d7b2438d3	956
switches	0:5c4d7b2438d3	957	// First write extensions, then the total length
switches	0:5c4d7b2438d3	958	//
switches	0:5c4d7b2438d3	959	#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
switches	0:5c4d7b2438d3	960	ssl_write_hostname_ext( ssl, p + 2 + ext_len, &olen );
switches	0:5c4d7b2438d3	961	ext_len += olen;
switches	0:5c4d7b2438d3	962	#endif
switches	0:5c4d7b2438d3	963
switches	0:5c4d7b2438d3	964	#if defined(MBEDTLS_SSL_RENEGOTIATION)
switches	0:5c4d7b2438d3	965	ssl_write_renegotiation_ext( ssl, p + 2 + ext_len, &olen );
switches	0:5c4d7b2438d3	966	ext_len += olen;
switches	0:5c4d7b2438d3	967	#endif
switches	0:5c4d7b2438d3	968
switches	0:5c4d7b2438d3	969	#if defined(MBEDTLS_SSL_PROTO_TLS1_2) && \
switches	0:5c4d7b2438d3	970	defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
switches	0:5c4d7b2438d3	971	ssl_write_signature_algorithms_ext( ssl, p + 2 + ext_len, &olen );
switches	0:5c4d7b2438d3	972	ext_len += olen;
switches	0:5c4d7b2438d3	973	#endif
switches	0:5c4d7b2438d3	974
switches	0:5c4d7b2438d3	975	#if defined(MBEDTLS_ECDH_C) \|\| defined(MBEDTLS_ECDSA_C) \|\| \
switches	0:5c4d7b2438d3	976	defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
switches	0:5c4d7b2438d3	977	ssl_write_supported_elliptic_curves_ext( ssl, p + 2 + ext_len, &olen );
switches	0:5c4d7b2438d3	978	ext_len += olen;
switches	0:5c4d7b2438d3	979
switches	0:5c4d7b2438d3	980	ssl_write_supported_point_formats_ext( ssl, p + 2 + ext_len, &olen );
switches	0:5c4d7b2438d3	981	ext_len += olen;
switches	0:5c4d7b2438d3	982	#endif
switches	0:5c4d7b2438d3	983
switches	0:5c4d7b2438d3	984	#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
switches	0:5c4d7b2438d3	985	ssl_write_ecjpake_kkpp_ext( ssl, p + 2 + ext_len, &olen );
switches	0:5c4d7b2438d3	986	ext_len += olen;
switches	0:5c4d7b2438d3	987	#endif
switches	0:5c4d7b2438d3	988
switches	0:5c4d7b2438d3	989	#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
switches	0:5c4d7b2438d3	990	ssl_write_max_fragment_length_ext( ssl, p + 2 + ext_len, &olen );
switches	0:5c4d7b2438d3	991	ext_len += olen;
switches	0:5c4d7b2438d3	992	#endif
switches	0:5c4d7b2438d3	993
switches	0:5c4d7b2438d3	994	#if defined(MBEDTLS_SSL_TRUNCATED_HMAC)
switches	0:5c4d7b2438d3	995	ssl_write_truncated_hmac_ext( ssl, p + 2 + ext_len, &olen );
switches	0:5c4d7b2438d3	996	ext_len += olen;
switches	0:5c4d7b2438d3	997	#endif
switches	0:5c4d7b2438d3	998
switches	0:5c4d7b2438d3	999	#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
switches	0:5c4d7b2438d3	1000	ssl_write_encrypt_then_mac_ext( ssl, p + 2 + ext_len, &olen );
switches	0:5c4d7b2438d3	1001	ext_len += olen;
switches	0:5c4d7b2438d3	1002	#endif
switches	0:5c4d7b2438d3	1003
switches	0:5c4d7b2438d3	1004	#if defined(MBEDTLS_SSL_EXTENDED_MASTER_SECRET)
switches	0:5c4d7b2438d3	1005	ssl_write_extended_ms_ext( ssl, p + 2 + ext_len, &olen );
switches	0:5c4d7b2438d3	1006	ext_len += olen;
switches	0:5c4d7b2438d3	1007	#endif
switches	0:5c4d7b2438d3	1008
switches	0:5c4d7b2438d3	1009	#if defined(MBEDTLS_SSL_ALPN)
switches	0:5c4d7b2438d3	1010	ssl_write_alpn_ext( ssl, p + 2 + ext_len, &olen );
switches	0:5c4d7b2438d3	1011	ext_len += olen;
switches	0:5c4d7b2438d3	1012	#endif
switches	0:5c4d7b2438d3	1013
switches	0:5c4d7b2438d3	1014	#if defined(MBEDTLS_SSL_SESSION_TICKETS)
switches	0:5c4d7b2438d3	1015	ssl_write_session_ticket_ext( ssl, p + 2 + ext_len, &olen );
switches	0:5c4d7b2438d3	1016	ext_len += olen;
switches	0:5c4d7b2438d3	1017	#endif
switches	0:5c4d7b2438d3	1018
switches	0:5c4d7b2438d3	1019	/* olen unused if all extensions are disabled */
switches	0:5c4d7b2438d3	1020	((void) olen);
switches	0:5c4d7b2438d3	1021
switches	0:5c4d7b2438d3	1022	MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello, total extension length: %d",
switches	0:5c4d7b2438d3	1023	ext_len ) );
switches	0:5c4d7b2438d3	1024
switches	0:5c4d7b2438d3	1025	if( ext_len > 0 )
switches	0:5c4d7b2438d3	1026	{
switches	0:5c4d7b2438d3	1027	*p++ = (unsigned char)( ( ext_len >> 8 ) & 0xFF );
switches	0:5c4d7b2438d3	1028	*p++ = (unsigned char)( ( ext_len ) & 0xFF );
switches	0:5c4d7b2438d3	1029	p += ext_len;
switches	0:5c4d7b2438d3	1030	}
switches	0:5c4d7b2438d3	1031
switches	0:5c4d7b2438d3	1032	ssl->out_msglen = p - buf;
switches	0:5c4d7b2438d3	1033	ssl->out_msgtype = MBEDTLS_SSL_MSG_HANDSHAKE;
switches	0:5c4d7b2438d3	1034	ssl->out_msg[0] = MBEDTLS_SSL_HS_CLIENT_HELLO;
switches	0:5c4d7b2438d3	1035
switches	0:5c4d7b2438d3	1036	ssl->state++;
switches	0:5c4d7b2438d3	1037
switches	0:5c4d7b2438d3	1038	#if defined(MBEDTLS_SSL_PROTO_DTLS)
switches	0:5c4d7b2438d3	1039	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
switches	0:5c4d7b2438d3	1040	mbedtls_ssl_send_flight_completed( ssl );
switches	0:5c4d7b2438d3	1041	#endif
switches	0:5c4d7b2438d3	1042
switches	0:5c4d7b2438d3	1043	if( ( ret = mbedtls_ssl_write_record( ssl ) ) != 0 )
switches	0:5c4d7b2438d3	1044	{
switches	0:5c4d7b2438d3	1045	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_write_record", ret );
switches	0:5c4d7b2438d3	1046	return( ret );
switches	0:5c4d7b2438d3	1047	}
switches	0:5c4d7b2438d3	1048
switches	0:5c4d7b2438d3	1049	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= write client hello" ) );
switches	0:5c4d7b2438d3	1050
switches	0:5c4d7b2438d3	1051	return( 0 );
switches	0:5c4d7b2438d3	1052	}
switches	0:5c4d7b2438d3	1053
switches	0:5c4d7b2438d3	1054	static int ssl_parse_renegotiation_info( mbedtls_ssl_context *ssl,
switches	0:5c4d7b2438d3	1055	const unsigned char *buf,
switches	0:5c4d7b2438d3	1056	size_t len )
switches	0:5c4d7b2438d3	1057	{
switches	0:5c4d7b2438d3	1058	int ret;
switches	0:5c4d7b2438d3	1059
switches	0:5c4d7b2438d3	1060	#if defined(MBEDTLS_SSL_RENEGOTIATION)
switches	0:5c4d7b2438d3	1061	if( ssl->renego_status != MBEDTLS_SSL_INITIAL_HANDSHAKE )
switches	0:5c4d7b2438d3	1062	{
switches	0:5c4d7b2438d3	1063	/* Check verify-data in constant-time. The length OTOH is no secret */
switches	0:5c4d7b2438d3	1064	if( len != 1 + ssl->verify_data_len * 2 \|\|
switches	0:5c4d7b2438d3	1065	buf[0] != ssl->verify_data_len * 2 \|\|
switches	0:5c4d7b2438d3	1066	mbedtls_ssl_safer_memcmp( buf + 1,
switches	0:5c4d7b2438d3	1067	ssl->own_verify_data, ssl->verify_data_len ) != 0 \|\|
switches	0:5c4d7b2438d3	1068	mbedtls_ssl_safer_memcmp( buf + 1 + ssl->verify_data_len,
switches	0:5c4d7b2438d3	1069	ssl->peer_verify_data, ssl->verify_data_len ) != 0 )
switches	0:5c4d7b2438d3	1070	{
switches	0:5c4d7b2438d3	1071	MBEDTLS_SSL_DEBUG_MSG( 1, ( "non-matching renegotiation info" ) );
switches	0:5c4d7b2438d3	1072
switches	0:5c4d7b2438d3	1073	if( ( ret = mbedtls_ssl_send_fatal_handshake_failure( ssl ) ) != 0 )
switches	0:5c4d7b2438d3	1074	return( ret );
switches	0:5c4d7b2438d3	1075
switches	0:5c4d7b2438d3	1076	return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
switches	0:5c4d7b2438d3	1077	}
switches	0:5c4d7b2438d3	1078	}
switches	0:5c4d7b2438d3	1079	else
switches	0:5c4d7b2438d3	1080	#endif /* MBEDTLS_SSL_RENEGOTIATION */
switches	0:5c4d7b2438d3	1081	{
switches	0:5c4d7b2438d3	1082	if( len != 1 \|\| buf[0] != 0x00 )
switches	0:5c4d7b2438d3	1083	{
switches	0:5c4d7b2438d3	1084	MBEDTLS_SSL_DEBUG_MSG( 1, ( "non-zero length renegotiation info" ) );
switches	0:5c4d7b2438d3	1085
switches	0:5c4d7b2438d3	1086	if( ( ret = mbedtls_ssl_send_fatal_handshake_failure( ssl ) ) != 0 )
switches	0:5c4d7b2438d3	1087	return( ret );
switches	0:5c4d7b2438d3	1088
switches	0:5c4d7b2438d3	1089	return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
switches	0:5c4d7b2438d3	1090	}
switches	0:5c4d7b2438d3	1091
switches	0:5c4d7b2438d3	1092	ssl->secure_renegotiation = MBEDTLS_SSL_SECURE_RENEGOTIATION;
switches	0:5c4d7b2438d3	1093	}
switches	0:5c4d7b2438d3	1094
switches	0:5c4d7b2438d3	1095	return( 0 );
switches	0:5c4d7b2438d3	1096	}
switches	0:5c4d7b2438d3	1097
switches	0:5c4d7b2438d3	1098	#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
switches	0:5c4d7b2438d3	1099	static int ssl_parse_max_fragment_length_ext( mbedtls_ssl_context *ssl,
switches	0:5c4d7b2438d3	1100	const unsigned char *buf,
switches	0:5c4d7b2438d3	1101	size_t len )
switches	0:5c4d7b2438d3	1102	{
switches	0:5c4d7b2438d3	1103	/*
switches	0:5c4d7b2438d3	1104	* server should use the extension only if we did,
switches	0:5c4d7b2438d3	1105	* and if so the server's value should match ours (and len is always 1)
switches	0:5c4d7b2438d3	1106	*/
switches	0:5c4d7b2438d3	1107	if( ssl->conf->mfl_code == MBEDTLS_SSL_MAX_FRAG_LEN_NONE \|\|
switches	0:5c4d7b2438d3	1108	len != 1 \|\|
switches	0:5c4d7b2438d3	1109	buf[0] != ssl->conf->mfl_code )
switches	0:5c4d7b2438d3	1110	{
switches	0:5c4d7b2438d3	1111	return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
switches	0:5c4d7b2438d3	1112	}
switches	0:5c4d7b2438d3	1113
switches	0:5c4d7b2438d3	1114	return( 0 );
switches	0:5c4d7b2438d3	1115	}
switches	0:5c4d7b2438d3	1116	#endif /* MBEDTLS_SSL_MAX_FRAGMENT_LENGTH */
switches	0:5c4d7b2438d3	1117
switches	0:5c4d7b2438d3	1118	#if defined(MBEDTLS_SSL_TRUNCATED_HMAC)
switches	0:5c4d7b2438d3	1119	static int ssl_parse_truncated_hmac_ext( mbedtls_ssl_context *ssl,
switches	0:5c4d7b2438d3	1120	const unsigned char *buf,
switches	0:5c4d7b2438d3	1121	size_t len )
switches	0:5c4d7b2438d3	1122	{
switches	0:5c4d7b2438d3	1123	if( ssl->conf->trunc_hmac == MBEDTLS_SSL_TRUNC_HMAC_DISABLED \|\|
switches	0:5c4d7b2438d3	1124	len != 0 )
switches	0:5c4d7b2438d3	1125	{
switches	0:5c4d7b2438d3	1126	return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
switches	0:5c4d7b2438d3	1127	}
switches	0:5c4d7b2438d3	1128
switches	0:5c4d7b2438d3	1129	((void) buf);
switches	0:5c4d7b2438d3	1130
switches	0:5c4d7b2438d3	1131	ssl->session_negotiate->trunc_hmac = MBEDTLS_SSL_TRUNC_HMAC_ENABLED;
switches	0:5c4d7b2438d3	1132
switches	0:5c4d7b2438d3	1133	return( 0 );
switches	0:5c4d7b2438d3	1134	}
switches	0:5c4d7b2438d3	1135	#endif /* MBEDTLS_SSL_TRUNCATED_HMAC */
switches	0:5c4d7b2438d3	1136
switches	0:5c4d7b2438d3	1137	#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
switches	0:5c4d7b2438d3	1138	static int ssl_parse_encrypt_then_mac_ext( mbedtls_ssl_context *ssl,
switches	0:5c4d7b2438d3	1139	const unsigned char *buf,
switches	0:5c4d7b2438d3	1140	size_t len )
switches	0:5c4d7b2438d3	1141	{
switches	0:5c4d7b2438d3	1142	if( ssl->conf->encrypt_then_mac == MBEDTLS_SSL_ETM_DISABLED \|\|
switches	0:5c4d7b2438d3	1143	ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 \|\|
switches	0:5c4d7b2438d3	1144	len != 0 )
switches	0:5c4d7b2438d3	1145	{
switches	0:5c4d7b2438d3	1146	return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
switches	0:5c4d7b2438d3	1147	}
switches	0:5c4d7b2438d3	1148
switches	0:5c4d7b2438d3	1149	((void) buf);
switches	0:5c4d7b2438d3	1150
switches	0:5c4d7b2438d3	1151	ssl->session_negotiate->encrypt_then_mac = MBEDTLS_SSL_ETM_ENABLED;
switches	0:5c4d7b2438d3	1152
switches	0:5c4d7b2438d3	1153	return( 0 );
switches	0:5c4d7b2438d3	1154	}
switches	0:5c4d7b2438d3	1155	#endif /* MBEDTLS_SSL_ENCRYPT_THEN_MAC */
switches	0:5c4d7b2438d3	1156
switches	0:5c4d7b2438d3	1157	#if defined(MBEDTLS_SSL_EXTENDED_MASTER_SECRET)
switches	0:5c4d7b2438d3	1158	static int ssl_parse_extended_ms_ext( mbedtls_ssl_context *ssl,
switches	0:5c4d7b2438d3	1159	const unsigned char *buf,
switches	0:5c4d7b2438d3	1160	size_t len )
switches	0:5c4d7b2438d3	1161	{
switches	0:5c4d7b2438d3	1162	if( ssl->conf->extended_ms == MBEDTLS_SSL_EXTENDED_MS_DISABLED \|\|
switches	0:5c4d7b2438d3	1163	ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 \|\|
switches	0:5c4d7b2438d3	1164	len != 0 )
switches	0:5c4d7b2438d3	1165	{
switches	0:5c4d7b2438d3	1166	return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
switches	0:5c4d7b2438d3	1167	}
switches	0:5c4d7b2438d3	1168
switches	0:5c4d7b2438d3	1169	((void) buf);
switches	0:5c4d7b2438d3	1170
switches	0:5c4d7b2438d3	1171	ssl->handshake->extended_ms = MBEDTLS_SSL_EXTENDED_MS_ENABLED;
switches	0:5c4d7b2438d3	1172
switches	0:5c4d7b2438d3	1173	return( 0 );
switches	0:5c4d7b2438d3	1174	}
switches	0:5c4d7b2438d3	1175	#endif /* MBEDTLS_SSL_EXTENDED_MASTER_SECRET */
switches	0:5c4d7b2438d3	1176
switches	0:5c4d7b2438d3	1177	#if defined(MBEDTLS_SSL_SESSION_TICKETS)
switches	0:5c4d7b2438d3	1178	static int ssl_parse_session_ticket_ext( mbedtls_ssl_context *ssl,
switches	0:5c4d7b2438d3	1179	const unsigned char *buf,
switches	0:5c4d7b2438d3	1180	size_t len )
switches	0:5c4d7b2438d3	1181	{
switches	0:5c4d7b2438d3	1182	if( ssl->conf->session_tickets == MBEDTLS_SSL_SESSION_TICKETS_DISABLED \|\|
switches	0:5c4d7b2438d3	1183	len != 0 )
switches	0:5c4d7b2438d3	1184	{
switches	0:5c4d7b2438d3	1185	return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
switches	0:5c4d7b2438d3	1186	}
switches	0:5c4d7b2438d3	1187
switches	0:5c4d7b2438d3	1188	((void) buf);
switches	0:5c4d7b2438d3	1189
switches	0:5c4d7b2438d3	1190	ssl->handshake->new_session_ticket = 1;
switches	0:5c4d7b2438d3	1191
switches	0:5c4d7b2438d3	1192	return( 0 );
switches	0:5c4d7b2438d3	1193	}
switches	0:5c4d7b2438d3	1194	#endif /* MBEDTLS_SSL_SESSION_TICKETS */
switches	0:5c4d7b2438d3	1195
switches	0:5c4d7b2438d3	1196	#if defined(MBEDTLS_ECDH_C) \|\| defined(MBEDTLS_ECDSA_C) \|\| \
switches	0:5c4d7b2438d3	1197	defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
switches	0:5c4d7b2438d3	1198	static int ssl_parse_supported_point_formats_ext( mbedtls_ssl_context *ssl,
switches	0:5c4d7b2438d3	1199	const unsigned char *buf,
switches	0:5c4d7b2438d3	1200	size_t len )
switches	0:5c4d7b2438d3	1201	{
switches	0:5c4d7b2438d3	1202	size_t list_size;
switches	0:5c4d7b2438d3	1203	const unsigned char *p;
switches	0:5c4d7b2438d3	1204
switches	0:5c4d7b2438d3	1205	list_size = buf[0];
switches	0:5c4d7b2438d3	1206	if( list_size + 1 != len )
switches	0:5c4d7b2438d3	1207	{
switches	0:5c4d7b2438d3	1208	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server hello message" ) );
switches	0:5c4d7b2438d3	1209	return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
switches	0:5c4d7b2438d3	1210	}
switches	0:5c4d7b2438d3	1211
switches	0:5c4d7b2438d3	1212	p = buf + 1;
switches	0:5c4d7b2438d3	1213	while( list_size > 0 )
switches	0:5c4d7b2438d3	1214	{
switches	0:5c4d7b2438d3	1215	if( p[0] == MBEDTLS_ECP_PF_UNCOMPRESSED \|\|
switches	0:5c4d7b2438d3	1216	p[0] == MBEDTLS_ECP_PF_COMPRESSED )
switches	0:5c4d7b2438d3	1217	{
switches	0:5c4d7b2438d3	1218	#if defined(MBEDTLS_ECDH_C) \|\| defined(MBEDTLS_ECDSA_C)
switches	0:5c4d7b2438d3	1219	ssl->handshake->ecdh_ctx.point_format = p[0];
switches	0:5c4d7b2438d3	1220	#endif
switches	0:5c4d7b2438d3	1221	#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
switches	0:5c4d7b2438d3	1222	ssl->handshake->ecjpake_ctx.point_format = p[0];
switches	0:5c4d7b2438d3	1223	#endif
switches	0:5c4d7b2438d3	1224	MBEDTLS_SSL_DEBUG_MSG( 4, ( "point format selected: %d", p[0] ) );
switches	0:5c4d7b2438d3	1225	return( 0 );
switches	0:5c4d7b2438d3	1226	}
switches	0:5c4d7b2438d3	1227
switches	0:5c4d7b2438d3	1228	list_size--;
switches	0:5c4d7b2438d3	1229	p++;
switches	0:5c4d7b2438d3	1230	}
switches	0:5c4d7b2438d3	1231
switches	0:5c4d7b2438d3	1232	MBEDTLS_SSL_DEBUG_MSG( 1, ( "no point format in common" ) );
switches	0:5c4d7b2438d3	1233	return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
switches	0:5c4d7b2438d3	1234	}
switches	0:5c4d7b2438d3	1235	#endif /* MBEDTLS_ECDH_C \|\| MBEDTLS_ECDSA_C \|\|
switches	0:5c4d7b2438d3	1236	MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED */
switches	0:5c4d7b2438d3	1237
switches	0:5c4d7b2438d3	1238	#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
switches	0:5c4d7b2438d3	1239	static int ssl_parse_ecjpake_kkpp( mbedtls_ssl_context *ssl,
switches	0:5c4d7b2438d3	1240	const unsigned char *buf,
switches	0:5c4d7b2438d3	1241	size_t len )
switches	0:5c4d7b2438d3	1242	{
switches	0:5c4d7b2438d3	1243	int ret;
switches	0:5c4d7b2438d3	1244
switches	0:5c4d7b2438d3	1245	if( ssl->transform_negotiate->ciphersuite_info->key_exchange !=
switches	0:5c4d7b2438d3	1246	MBEDTLS_KEY_EXCHANGE_ECJPAKE )
switches	0:5c4d7b2438d3	1247	{
switches	0:5c4d7b2438d3	1248	MBEDTLS_SSL_DEBUG_MSG( 3, ( "skip ecjpake kkpp extension" ) );
switches	0:5c4d7b2438d3	1249	return( 0 );
switches	0:5c4d7b2438d3	1250	}
switches	0:5c4d7b2438d3	1251
switches	0:5c4d7b2438d3	1252	/* If we got here, we no longer need our cached extension */
switches	0:5c4d7b2438d3	1253	mbedtls_free( ssl->handshake->ecjpake_cache );
switches	0:5c4d7b2438d3	1254	ssl->handshake->ecjpake_cache = NULL;
switches	0:5c4d7b2438d3	1255	ssl->handshake->ecjpake_cache_len = 0;
switches	0:5c4d7b2438d3	1256
switches	0:5c4d7b2438d3	1257	if( ( ret = mbedtls_ecjpake_read_round_one( &ssl->handshake->ecjpake_ctx,
switches	0:5c4d7b2438d3	1258	buf, len ) ) != 0 )
switches	0:5c4d7b2438d3	1259	{
switches	0:5c4d7b2438d3	1260	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ecjpake_read_round_one", ret );
switches	0:5c4d7b2438d3	1261	return( ret );
switches	0:5c4d7b2438d3	1262	}
switches	0:5c4d7b2438d3	1263
switches	0:5c4d7b2438d3	1264	return( 0 );
switches	0:5c4d7b2438d3	1265	}
switches	0:5c4d7b2438d3	1266	#endif /* MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED */
switches	0:5c4d7b2438d3	1267
switches	0:5c4d7b2438d3	1268	#if defined(MBEDTLS_SSL_ALPN)
switches	0:5c4d7b2438d3	1269	static int ssl_parse_alpn_ext( mbedtls_ssl_context *ssl,
switches	0:5c4d7b2438d3	1270	const unsigned char *buf, size_t len )
switches	0:5c4d7b2438d3	1271	{
switches	0:5c4d7b2438d3	1272	size_t list_len, name_len;
switches	0:5c4d7b2438d3	1273	const char **p;
switches	0:5c4d7b2438d3	1274
switches	0:5c4d7b2438d3	1275	/* If we didn't send it, the server shouldn't send it */
switches	0:5c4d7b2438d3	1276	if( ssl->conf->alpn_list == NULL )
switches	0:5c4d7b2438d3	1277	return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
switches	0:5c4d7b2438d3	1278
switches	0:5c4d7b2438d3	1279	/*
switches	0:5c4d7b2438d3	1280	* opaque ProtocolName<1..2^8-1>;
switches	0:5c4d7b2438d3	1281	*
switches	0:5c4d7b2438d3	1282	* struct {
switches	0:5c4d7b2438d3	1283	* ProtocolName protocol_name_list<2..2^16-1>
switches	0:5c4d7b2438d3	1284	* } ProtocolNameList;
switches	0:5c4d7b2438d3	1285	*
switches	0:5c4d7b2438d3	1286	* the "ProtocolNameList" MUST contain exactly one "ProtocolName"
switches	0:5c4d7b2438d3	1287	*/
switches	0:5c4d7b2438d3	1288
switches	0:5c4d7b2438d3	1289	/* Min length is 2 (list_len) + 1 (name_len) + 1 (name) */
switches	0:5c4d7b2438d3	1290	if( len < 4 )
switches	0:5c4d7b2438d3	1291	return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
switches	0:5c4d7b2438d3	1292
switches	0:5c4d7b2438d3	1293	list_len = ( buf[0] << 8 ) \| buf[1];
switches	0:5c4d7b2438d3	1294	if( list_len != len - 2 )
switches	0:5c4d7b2438d3	1295	return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
switches	0:5c4d7b2438d3	1296
switches	0:5c4d7b2438d3	1297	name_len = buf[2];
switches	0:5c4d7b2438d3	1298	if( name_len != list_len - 1 )
switches	0:5c4d7b2438d3	1299	return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
switches	0:5c4d7b2438d3	1300
switches	0:5c4d7b2438d3	1301	/* Check that the server chosen protocol was in our list and save it */
switches	0:5c4d7b2438d3	1302	for( p = ssl->conf->alpn_list; *p != NULL; p++ )
switches	0:5c4d7b2438d3	1303	{
switches	0:5c4d7b2438d3	1304	if( name_len == strlen( *p ) &&
switches	0:5c4d7b2438d3	1305	memcmp( buf + 3, *p, name_len ) == 0 )
switches	0:5c4d7b2438d3	1306	{
switches	0:5c4d7b2438d3	1307	ssl->alpn_chosen = *p;
switches	0:5c4d7b2438d3	1308	return( 0 );
switches	0:5c4d7b2438d3	1309	}
switches	0:5c4d7b2438d3	1310	}
switches	0:5c4d7b2438d3	1311
switches	0:5c4d7b2438d3	1312	return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
switches	0:5c4d7b2438d3	1313	}
switches	0:5c4d7b2438d3	1314	#endif /* MBEDTLS_SSL_ALPN */
switches	0:5c4d7b2438d3	1315
switches	0:5c4d7b2438d3	1316	/*
switches	0:5c4d7b2438d3	1317	* Parse HelloVerifyRequest. Only called after verifying the HS type.
switches	0:5c4d7b2438d3	1318	*/
switches	0:5c4d7b2438d3	1319	#if defined(MBEDTLS_SSL_PROTO_DTLS)
switches	0:5c4d7b2438d3	1320	static int ssl_parse_hello_verify_request( mbedtls_ssl_context *ssl )
switches	0:5c4d7b2438d3	1321	{
switches	0:5c4d7b2438d3	1322	const unsigned char *p = ssl->in_msg + mbedtls_ssl_hs_hdr_len( ssl );
switches	0:5c4d7b2438d3	1323	int major_ver, minor_ver;
switches	0:5c4d7b2438d3	1324	unsigned char cookie_len;
switches	0:5c4d7b2438d3	1325
switches	0:5c4d7b2438d3	1326	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> parse hello verify request" ) );
switches	0:5c4d7b2438d3	1327
switches	0:5c4d7b2438d3	1328	/*
switches	0:5c4d7b2438d3	1329	* struct {
switches	0:5c4d7b2438d3	1330	* ProtocolVersion server_version;
switches	0:5c4d7b2438d3	1331	* opaque cookie<0..2^8-1>;
switches	0:5c4d7b2438d3	1332	* } HelloVerifyRequest;
switches	0:5c4d7b2438d3	1333	*/
switches	0:5c4d7b2438d3	1334	MBEDTLS_SSL_DEBUG_BUF( 3, "server version", p, 2 );
switches	0:5c4d7b2438d3	1335	mbedtls_ssl_read_version( &major_ver, &minor_ver, ssl->conf->transport, p );
switches	0:5c4d7b2438d3	1336	p += 2;
switches	0:5c4d7b2438d3	1337
switches	0:5c4d7b2438d3	1338	/*
switches	0:5c4d7b2438d3	1339	* Since the RFC is not clear on this point, accept DTLS 1.0 (TLS 1.1)
switches	0:5c4d7b2438d3	1340	* even is lower than our min version.
switches	0:5c4d7b2438d3	1341	*/
switches	0:5c4d7b2438d3	1342	if( major_ver < MBEDTLS_SSL_MAJOR_VERSION_3 \|\|
switches	0:5c4d7b2438d3	1343	minor_ver < MBEDTLS_SSL_MINOR_VERSION_2 \|\|
switches	0:5c4d7b2438d3	1344	major_ver > ssl->conf->max_major_ver \|\|
switches	0:5c4d7b2438d3	1345	minor_ver > ssl->conf->max_minor_ver )
switches	0:5c4d7b2438d3	1346	{
switches	0:5c4d7b2438d3	1347	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server version" ) );
switches	0:5c4d7b2438d3	1348
switches	0:5c4d7b2438d3	1349	mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
switches	0:5c4d7b2438d3	1350	MBEDTLS_SSL_ALERT_MSG_PROTOCOL_VERSION );
switches	0:5c4d7b2438d3	1351
switches	0:5c4d7b2438d3	1352	return( MBEDTLS_ERR_SSL_BAD_HS_PROTOCOL_VERSION );
switches	0:5c4d7b2438d3	1353	}
switches	0:5c4d7b2438d3	1354
switches	0:5c4d7b2438d3	1355	cookie_len = *p++;
switches	0:5c4d7b2438d3	1356	MBEDTLS_SSL_DEBUG_BUF( 3, "cookie", p, cookie_len );
switches	0:5c4d7b2438d3	1357
switches	0:5c4d7b2438d3	1358	if( ( ssl->in_msg + ssl->in_msglen ) - p < cookie_len )
switches	0:5c4d7b2438d3	1359	{
switches	0:5c4d7b2438d3	1360	MBEDTLS_SSL_DEBUG_MSG( 1,
switches	0:5c4d7b2438d3	1361	( "cookie length does not match incoming message size" ) );
switches	0:5c4d7b2438d3	1362	mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
switches	0:5c4d7b2438d3	1363	MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
switches	0:5c4d7b2438d3	1364	return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
switches	0:5c4d7b2438d3	1365	}
switches	0:5c4d7b2438d3	1366
switches	0:5c4d7b2438d3	1367	mbedtls_free( ssl->handshake->verify_cookie );
switches	0:5c4d7b2438d3	1368
switches	0:5c4d7b2438d3	1369	ssl->handshake->verify_cookie = mbedtls_calloc( 1, cookie_len );
switches	0:5c4d7b2438d3	1370	if( ssl->handshake->verify_cookie == NULL )
switches	0:5c4d7b2438d3	1371	{
switches	0:5c4d7b2438d3	1372	MBEDTLS_SSL_DEBUG_MSG( 1, ( "alloc failed (%d bytes)", cookie_len ) );
switches	0:5c4d7b2438d3	1373	return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
switches	0:5c4d7b2438d3	1374	}
switches	0:5c4d7b2438d3	1375
switches	0:5c4d7b2438d3	1376	memcpy( ssl->handshake->verify_cookie, p, cookie_len );
switches	0:5c4d7b2438d3	1377	ssl->handshake->verify_cookie_len = cookie_len;
switches	0:5c4d7b2438d3	1378
switches	0:5c4d7b2438d3	1379	/* Start over at ClientHello */
switches	0:5c4d7b2438d3	1380	ssl->state = MBEDTLS_SSL_CLIENT_HELLO;
switches	0:5c4d7b2438d3	1381	mbedtls_ssl_reset_checksum( ssl );
switches	0:5c4d7b2438d3	1382
switches	0:5c4d7b2438d3	1383	mbedtls_ssl_recv_flight_completed( ssl );
switches	0:5c4d7b2438d3	1384
switches	0:5c4d7b2438d3	1385	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= parse hello verify request" ) );
switches	0:5c4d7b2438d3	1386
switches	0:5c4d7b2438d3	1387	return( 0 );
switches	0:5c4d7b2438d3	1388	}
switches	0:5c4d7b2438d3	1389	#endif /* MBEDTLS_SSL_PROTO_DTLS */
switches	0:5c4d7b2438d3	1390
switches	0:5c4d7b2438d3	1391	static int ssl_parse_server_hello( mbedtls_ssl_context *ssl )
switches	0:5c4d7b2438d3	1392	{
switches	0:5c4d7b2438d3	1393	int ret, i;
switches	0:5c4d7b2438d3	1394	size_t n;
switches	0:5c4d7b2438d3	1395	size_t ext_len;
switches	0:5c4d7b2438d3	1396	unsigned char buf, ext;
switches	0:5c4d7b2438d3	1397	unsigned char comp;
switches	0:5c4d7b2438d3	1398	#if defined(MBEDTLS_ZLIB_SUPPORT)
switches	0:5c4d7b2438d3	1399	int accept_comp;
switches	0:5c4d7b2438d3	1400	#endif
switches	0:5c4d7b2438d3	1401	#if defined(MBEDTLS_SSL_RENEGOTIATION)
switches	0:5c4d7b2438d3	1402	int renegotiation_info_seen = 0;
switches	0:5c4d7b2438d3	1403	#endif
switches	0:5c4d7b2438d3	1404	int handshake_failure = 0;
switches	0:5c4d7b2438d3	1405	const mbedtls_ssl_ciphersuite_t *suite_info;
switches	0:5c4d7b2438d3	1406	#if defined(MBEDTLS_DEBUG_C)
switches	0:5c4d7b2438d3	1407	uint32_t t;
switches	0:5c4d7b2438d3	1408	#endif
switches	0:5c4d7b2438d3	1409
switches	0:5c4d7b2438d3	1410	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> parse server hello" ) );
switches	0:5c4d7b2438d3	1411
switches	0:5c4d7b2438d3	1412	buf = ssl->in_msg;
switches	0:5c4d7b2438d3	1413
switches	0:5c4d7b2438d3	1414	if( ( ret = mbedtls_ssl_read_record( ssl ) ) != 0 )
switches	0:5c4d7b2438d3	1415	{
switches	0:5c4d7b2438d3	1416	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_read_record", ret );
switches	0:5c4d7b2438d3	1417	return( ret );
switches	0:5c4d7b2438d3	1418	}
switches	0:5c4d7b2438d3	1419
switches	0:5c4d7b2438d3	1420	if( ssl->in_msgtype != MBEDTLS_SSL_MSG_HANDSHAKE )
switches	0:5c4d7b2438d3	1421	{
switches	0:5c4d7b2438d3	1422	#if defined(MBEDTLS_SSL_RENEGOTIATION)
switches	0:5c4d7b2438d3	1423	if( ssl->renego_status == MBEDTLS_SSL_RENEGOTIATION_IN_PROGRESS )
switches	0:5c4d7b2438d3	1424	{
switches	0:5c4d7b2438d3	1425	ssl->renego_records_seen++;
switches	0:5c4d7b2438d3	1426
switches	0:5c4d7b2438d3	1427	if( ssl->conf->renego_max_records >= 0 &&
switches	0:5c4d7b2438d3	1428	ssl->renego_records_seen > ssl->conf->renego_max_records )
switches	0:5c4d7b2438d3	1429	{
switches	0:5c4d7b2438d3	1430	MBEDTLS_SSL_DEBUG_MSG( 1, ( "renegotiation requested, "
switches	0:5c4d7b2438d3	1431	"but not honored by server" ) );
switches	0:5c4d7b2438d3	1432	return( MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE );
switches	0:5c4d7b2438d3	1433	}
switches	0:5c4d7b2438d3	1434
switches	0:5c4d7b2438d3	1435	MBEDTLS_SSL_DEBUG_MSG( 1, ( "non-handshake message during renego" ) );
switches	0:5c4d7b2438d3	1436	return( MBEDTLS_ERR_SSL_WAITING_SERVER_HELLO_RENEGO );
switches	0:5c4d7b2438d3	1437	}
switches	0:5c4d7b2438d3	1438	#endif /* MBEDTLS_SSL_RENEGOTIATION */
switches	0:5c4d7b2438d3	1439
switches	0:5c4d7b2438d3	1440	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server hello message" ) );
switches	0:5c4d7b2438d3	1441	return( MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE );
switches	0:5c4d7b2438d3	1442	}
switches	0:5c4d7b2438d3	1443
switches	0:5c4d7b2438d3	1444	#if defined(MBEDTLS_SSL_PROTO_DTLS)
switches	0:5c4d7b2438d3	1445	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
switches	0:5c4d7b2438d3	1446	{
switches	0:5c4d7b2438d3	1447	if( buf[0] == MBEDTLS_SSL_HS_HELLO_VERIFY_REQUEST )
switches	0:5c4d7b2438d3	1448	{
switches	0:5c4d7b2438d3	1449	MBEDTLS_SSL_DEBUG_MSG( 2, ( "received hello verify request" ) );
switches	0:5c4d7b2438d3	1450	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= parse server hello" ) );
switches	0:5c4d7b2438d3	1451	return( ssl_parse_hello_verify_request( ssl ) );
switches	0:5c4d7b2438d3	1452	}
switches	0:5c4d7b2438d3	1453	else
switches	0:5c4d7b2438d3	1454	{
switches	0:5c4d7b2438d3	1455	/* We made it through the verification process */
switches	0:5c4d7b2438d3	1456	mbedtls_free( ssl->handshake->verify_cookie );
switches	0:5c4d7b2438d3	1457	ssl->handshake->verify_cookie = NULL;
switches	0:5c4d7b2438d3	1458	ssl->handshake->verify_cookie_len = 0;
switches	0:5c4d7b2438d3	1459	}
switches	0:5c4d7b2438d3	1460	}
switches	0:5c4d7b2438d3	1461	#endif /* MBEDTLS_SSL_PROTO_DTLS */
switches	0:5c4d7b2438d3	1462
switches	0:5c4d7b2438d3	1463	if( ssl->in_hslen < 38 + mbedtls_ssl_hs_hdr_len( ssl ) \|\|
switches	0:5c4d7b2438d3	1464	buf[0] != MBEDTLS_SSL_HS_SERVER_HELLO )
switches	0:5c4d7b2438d3	1465	{
switches	0:5c4d7b2438d3	1466	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server hello message" ) );
switches	0:5c4d7b2438d3	1467	return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
switches	0:5c4d7b2438d3	1468	}
switches	0:5c4d7b2438d3	1469
switches	0:5c4d7b2438d3	1470	/*
switches	0:5c4d7b2438d3	1471	* 0 . 1 server_version
switches	0:5c4d7b2438d3	1472	* 2 . 33 random (maybe including 4 bytes of Unix time)
switches	0:5c4d7b2438d3	1473	* 34 . 34 session_id length = n
switches	0:5c4d7b2438d3	1474	* 35 . 34+n session_id
switches	0:5c4d7b2438d3	1475	* 35+n . 36+n cipher_suite
switches	0:5c4d7b2438d3	1476	* 37+n . 37+n compression_method
switches	0:5c4d7b2438d3	1477	*
switches	0:5c4d7b2438d3	1478	* 38+n . 39+n extensions length (optional)
switches	0:5c4d7b2438d3	1479	* 40+n . .. extensions
switches	0:5c4d7b2438d3	1480	*/
switches	0:5c4d7b2438d3	1481	buf += mbedtls_ssl_hs_hdr_len( ssl );
switches	0:5c4d7b2438d3	1482
switches	0:5c4d7b2438d3	1483	MBEDTLS_SSL_DEBUG_BUF( 3, "server hello, version", buf + 0, 2 );
switches	0:5c4d7b2438d3	1484	mbedtls_ssl_read_version( &ssl->major_ver, &ssl->minor_ver,
switches	0:5c4d7b2438d3	1485	ssl->conf->transport, buf + 0 );
switches	0:5c4d7b2438d3	1486
switches	0:5c4d7b2438d3	1487	if( ssl->major_ver < ssl->conf->min_major_ver \|\|
switches	0:5c4d7b2438d3	1488	ssl->minor_ver < ssl->conf->min_minor_ver \|\|
switches	0:5c4d7b2438d3	1489	ssl->major_ver > ssl->conf->max_major_ver \|\|
switches	0:5c4d7b2438d3	1490	ssl->minor_ver > ssl->conf->max_minor_ver )
switches	0:5c4d7b2438d3	1491	{
switches	0:5c4d7b2438d3	1492	MBEDTLS_SSL_DEBUG_MSG( 1, ( "server version out of bounds - "
switches	0:5c4d7b2438d3	1493	" min: [%d:%d], server: [%d:%d], max: [%d:%d]",
switches	0:5c4d7b2438d3	1494	ssl->conf->min_major_ver, ssl->conf->min_minor_ver,
switches	0:5c4d7b2438d3	1495	ssl->major_ver, ssl->minor_ver,
switches	0:5c4d7b2438d3	1496	ssl->conf->max_major_ver, ssl->conf->max_minor_ver ) );
switches	0:5c4d7b2438d3	1497
switches	0:5c4d7b2438d3	1498	mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
switches	0:5c4d7b2438d3	1499	MBEDTLS_SSL_ALERT_MSG_PROTOCOL_VERSION );
switches	0:5c4d7b2438d3	1500
switches	0:5c4d7b2438d3	1501	return( MBEDTLS_ERR_SSL_BAD_HS_PROTOCOL_VERSION );
switches	0:5c4d7b2438d3	1502	}
switches	0:5c4d7b2438d3	1503
switches	0:5c4d7b2438d3	1504	#if defined(MBEDTLS_DEBUG_C)
switches	0:5c4d7b2438d3	1505	t = ( (uint32_t) buf[2] << 24 )
switches	0:5c4d7b2438d3	1506	\| ( (uint32_t) buf[3] << 16 )
switches	0:5c4d7b2438d3	1507	\| ( (uint32_t) buf[4] << 8 )
switches	0:5c4d7b2438d3	1508	\| ( (uint32_t) buf[5] );
switches	0:5c4d7b2438d3	1509	MBEDTLS_SSL_DEBUG_MSG( 3, ( "server hello, current time: %lu", t ) );
switches	0:5c4d7b2438d3	1510	#endif
switches	0:5c4d7b2438d3	1511
switches	0:5c4d7b2438d3	1512	memcpy( ssl->handshake->randbytes + 32, buf + 2, 32 );
switches	0:5c4d7b2438d3	1513
switches	0:5c4d7b2438d3	1514	n = buf[34];
switches	0:5c4d7b2438d3	1515
switches	0:5c4d7b2438d3	1516	MBEDTLS_SSL_DEBUG_BUF( 3, "server hello, random bytes", buf + 2, 32 );
switches	0:5c4d7b2438d3	1517
switches	0:5c4d7b2438d3	1518	if( n > 32 )
switches	0:5c4d7b2438d3	1519	{
switches	0:5c4d7b2438d3	1520	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server hello message" ) );
switches	0:5c4d7b2438d3	1521	return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
switches	0:5c4d7b2438d3	1522	}
switches	0:5c4d7b2438d3	1523
switches	0:5c4d7b2438d3	1524	if( ssl->in_hslen > mbedtls_ssl_hs_hdr_len( ssl ) + 39 + n )
switches	0:5c4d7b2438d3	1525	{
switches	0:5c4d7b2438d3	1526	ext_len = ( ( buf[38 + n] << 8 )
switches	0:5c4d7b2438d3	1527	\| ( buf[39 + n] ) );
switches	0:5c4d7b2438d3	1528
switches	0:5c4d7b2438d3	1529	if( ( ext_len > 0 && ext_len < 4 ) \|\|
switches	0:5c4d7b2438d3	1530	ssl->in_hslen != mbedtls_ssl_hs_hdr_len( ssl ) + 40 + n + ext_len )
switches	0:5c4d7b2438d3	1531	{
switches	0:5c4d7b2438d3	1532	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server hello message" ) );
switches	0:5c4d7b2438d3	1533	return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
switches	0:5c4d7b2438d3	1534	}
switches	0:5c4d7b2438d3	1535	}
switches	0:5c4d7b2438d3	1536	else if( ssl->in_hslen == mbedtls_ssl_hs_hdr_len( ssl ) + 38 + n )
switches	0:5c4d7b2438d3	1537	{
switches	0:5c4d7b2438d3	1538	ext_len = 0;
switches	0:5c4d7b2438d3	1539	}
switches	0:5c4d7b2438d3	1540	else
switches	0:5c4d7b2438d3	1541	{
switches	0:5c4d7b2438d3	1542	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server hello message" ) );
switches	0:5c4d7b2438d3	1543	return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
switches	0:5c4d7b2438d3	1544	}
switches	0:5c4d7b2438d3	1545
switches	0:5c4d7b2438d3	1546	/* ciphersuite (used later) */
switches	0:5c4d7b2438d3	1547	i = ( buf[35 + n] << 8 ) \| buf[36 + n];
switches	0:5c4d7b2438d3	1548
switches	0:5c4d7b2438d3	1549	/*
switches	0:5c4d7b2438d3	1550	* Read and check compression
switches	0:5c4d7b2438d3	1551	*/
switches	0:5c4d7b2438d3	1552	comp = buf[37 + n];
switches	0:5c4d7b2438d3	1553
switches	0:5c4d7b2438d3	1554	#if defined(MBEDTLS_ZLIB_SUPPORT)
switches	0:5c4d7b2438d3	1555	/* See comments in ssl_write_client_hello() */
switches	0:5c4d7b2438d3	1556	#if defined(MBEDTLS_SSL_PROTO_DTLS)
switches	0:5c4d7b2438d3	1557	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
switches	0:5c4d7b2438d3	1558	accept_comp = 0;
switches	0:5c4d7b2438d3	1559	else
switches	0:5c4d7b2438d3	1560	#endif
switches	0:5c4d7b2438d3	1561	accept_comp = 1;
switches	0:5c4d7b2438d3	1562
switches	0:5c4d7b2438d3	1563	if( comp != MBEDTLS_SSL_COMPRESS_NULL &&
switches	0:5c4d7b2438d3	1564	( comp != MBEDTLS_SSL_COMPRESS_DEFLATE \|\| accept_comp == 0 ) )
switches	0:5c4d7b2438d3	1565	#else /* MBEDTLS_ZLIB_SUPPORT */
switches	0:5c4d7b2438d3	1566	if( comp != MBEDTLS_SSL_COMPRESS_NULL )
switches	0:5c4d7b2438d3	1567	#endif/* MBEDTLS_ZLIB_SUPPORT */
switches	0:5c4d7b2438d3	1568	{
switches	0:5c4d7b2438d3	1569	MBEDTLS_SSL_DEBUG_MSG( 1, ( "server hello, bad compression: %d", comp ) );
switches	0:5c4d7b2438d3	1570	return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE );
switches	0:5c4d7b2438d3	1571	}
switches	0:5c4d7b2438d3	1572
switches	0:5c4d7b2438d3	1573	/*
switches	0:5c4d7b2438d3	1574	* Initialize update checksum functions
switches	0:5c4d7b2438d3	1575	*/
switches	0:5c4d7b2438d3	1576	ssl->transform_negotiate->ciphersuite_info = mbedtls_ssl_ciphersuite_from_id( i );
switches	0:5c4d7b2438d3	1577
switches	0:5c4d7b2438d3	1578	if( ssl->transform_negotiate->ciphersuite_info == NULL )
switches	0:5c4d7b2438d3	1579	{
switches	0:5c4d7b2438d3	1580	MBEDTLS_SSL_DEBUG_MSG( 1, ( "ciphersuite info for %04x not found", i ) );
switches	0:5c4d7b2438d3	1581	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
switches	0:5c4d7b2438d3	1582	}
switches	0:5c4d7b2438d3	1583
switches	0:5c4d7b2438d3	1584	mbedtls_ssl_optimize_checksum( ssl, ssl->transform_negotiate->ciphersuite_info );
switches	0:5c4d7b2438d3	1585
switches	0:5c4d7b2438d3	1586	MBEDTLS_SSL_DEBUG_MSG( 3, ( "server hello, session id len.: %d", n ) );
switches	0:5c4d7b2438d3	1587	MBEDTLS_SSL_DEBUG_BUF( 3, "server hello, session id", buf + 35, n );
switches	0:5c4d7b2438d3	1588
switches	0:5c4d7b2438d3	1589	/*
switches	0:5c4d7b2438d3	1590	* Check if the session can be resumed
switches	0:5c4d7b2438d3	1591	*/
switches	0:5c4d7b2438d3	1592	if( ssl->handshake->resume == 0 \|\| n == 0 \|\|
switches	0:5c4d7b2438d3	1593	#if defined(MBEDTLS_SSL_RENEGOTIATION)
switches	0:5c4d7b2438d3	1594	ssl->renego_status != MBEDTLS_SSL_INITIAL_HANDSHAKE \|\|
switches	0:5c4d7b2438d3	1595	#endif
switches	0:5c4d7b2438d3	1596	ssl->session_negotiate->ciphersuite != i \|\|
switches	0:5c4d7b2438d3	1597	ssl->session_negotiate->compression != comp \|\|
switches	0:5c4d7b2438d3	1598	ssl->session_negotiate->id_len != n \|\|
switches	0:5c4d7b2438d3	1599	memcmp( ssl->session_negotiate->id, buf + 35, n ) != 0 )
switches	0:5c4d7b2438d3	1600	{
switches	0:5c4d7b2438d3	1601	ssl->state++;
switches	0:5c4d7b2438d3	1602	ssl->handshake->resume = 0;
switches	0:5c4d7b2438d3	1603	#if defined(MBEDTLS_HAVE_TIME)
switches	0:5c4d7b2438d3	1604	ssl->session_negotiate->start = mbedtls_time( NULL );
switches	0:5c4d7b2438d3	1605	#endif
switches	0:5c4d7b2438d3	1606	ssl->session_negotiate->ciphersuite = i;
switches	0:5c4d7b2438d3	1607	ssl->session_negotiate->compression = comp;
switches	0:5c4d7b2438d3	1608	ssl->session_negotiate->id_len = n;
switches	0:5c4d7b2438d3	1609	memcpy( ssl->session_negotiate->id, buf + 35, n );
switches	0:5c4d7b2438d3	1610	}
switches	0:5c4d7b2438d3	1611	else
switches	0:5c4d7b2438d3	1612	{
switches	0:5c4d7b2438d3	1613	ssl->state = MBEDTLS_SSL_SERVER_CHANGE_CIPHER_SPEC;
switches	0:5c4d7b2438d3	1614
switches	0:5c4d7b2438d3	1615	if( ( ret = mbedtls_ssl_derive_keys( ssl ) ) != 0 )
switches	0:5c4d7b2438d3	1616	{
switches	0:5c4d7b2438d3	1617	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_derive_keys", ret );
switches	0:5c4d7b2438d3	1618	return( ret );
switches	0:5c4d7b2438d3	1619	}
switches	0:5c4d7b2438d3	1620	}
switches	0:5c4d7b2438d3	1621
switches	0:5c4d7b2438d3	1622	MBEDTLS_SSL_DEBUG_MSG( 3, ( "%s session has been resumed",
switches	0:5c4d7b2438d3	1623	ssl->handshake->resume ? "a" : "no" ) );
switches	0:5c4d7b2438d3	1624
switches	0:5c4d7b2438d3	1625	MBEDTLS_SSL_DEBUG_MSG( 3, ( "server hello, chosen ciphersuite: %04x", i ) );
switches	0:5c4d7b2438d3	1626	MBEDTLS_SSL_DEBUG_MSG( 3, ( "server hello, compress alg.: %d", buf[37 + n] ) );
switches	0:5c4d7b2438d3	1627
switches	0:5c4d7b2438d3	1628	suite_info = mbedtls_ssl_ciphersuite_from_id( ssl->session_negotiate->ciphersuite );
switches	0:5c4d7b2438d3	1629	if( suite_info == NULL
switches	0:5c4d7b2438d3	1630	#if defined(MBEDTLS_ARC4_C)
switches	0:5c4d7b2438d3	1631	\|\| ( ssl->conf->arc4_disabled &&
switches	0:5c4d7b2438d3	1632	suite_info->cipher == MBEDTLS_CIPHER_ARC4_128 )
switches	0:5c4d7b2438d3	1633	#endif
switches	0:5c4d7b2438d3	1634	)
switches	0:5c4d7b2438d3	1635	{
switches	0:5c4d7b2438d3	1636	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server hello message" ) );
switches	0:5c4d7b2438d3	1637	return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
switches	0:5c4d7b2438d3	1638	}
switches	0:5c4d7b2438d3	1639
switches	0:5c4d7b2438d3	1640	MBEDTLS_SSL_DEBUG_MSG( 3, ( "server hello, chosen ciphersuite: %s", suite_info->name ) );
switches	0:5c4d7b2438d3	1641
switches	0:5c4d7b2438d3	1642	i = 0;
switches	0:5c4d7b2438d3	1643	while( 1 )
switches	0:5c4d7b2438d3	1644	{
switches	0:5c4d7b2438d3	1645	if( ssl->conf->ciphersuite_list[ssl->minor_ver][i] == 0 )
switches	0:5c4d7b2438d3	1646	{
switches	0:5c4d7b2438d3	1647	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server hello message" ) );
switches	0:5c4d7b2438d3	1648	return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
switches	0:5c4d7b2438d3	1649	}
switches	0:5c4d7b2438d3	1650
switches	0:5c4d7b2438d3	1651	if( ssl->conf->ciphersuite_list[ssl->minor_ver][i++] ==
switches	0:5c4d7b2438d3	1652	ssl->session_negotiate->ciphersuite )
switches	0:5c4d7b2438d3	1653	{
switches	0:5c4d7b2438d3	1654	break;
switches	0:5c4d7b2438d3	1655	}
switches	0:5c4d7b2438d3	1656	}
switches	0:5c4d7b2438d3	1657
switches	0:5c4d7b2438d3	1658	if( comp != MBEDTLS_SSL_COMPRESS_NULL
switches	0:5c4d7b2438d3	1659	#if defined(MBEDTLS_ZLIB_SUPPORT)
switches	0:5c4d7b2438d3	1660	&& comp != MBEDTLS_SSL_COMPRESS_DEFLATE
switches	0:5c4d7b2438d3	1661	#endif
switches	0:5c4d7b2438d3	1662	)
switches	0:5c4d7b2438d3	1663	{
switches	0:5c4d7b2438d3	1664	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server hello message" ) );
switches	0:5c4d7b2438d3	1665	return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
switches	0:5c4d7b2438d3	1666	}
switches	0:5c4d7b2438d3	1667	ssl->session_negotiate->compression = comp;
switches	0:5c4d7b2438d3	1668
switches	0:5c4d7b2438d3	1669	ext = buf + 40 + n;
switches	0:5c4d7b2438d3	1670
switches	0:5c4d7b2438d3	1671	MBEDTLS_SSL_DEBUG_MSG( 2, ( "server hello, total extension length: %d", ext_len ) );
switches	0:5c4d7b2438d3	1672
switches	0:5c4d7b2438d3	1673	while( ext_len )
switches	0:5c4d7b2438d3	1674	{
switches	0:5c4d7b2438d3	1675	unsigned int ext_id = ( ( ext[0] << 8 )
switches	0:5c4d7b2438d3	1676	\| ( ext[1] ) );
switches	0:5c4d7b2438d3	1677	unsigned int ext_size = ( ( ext[2] << 8 )
switches	0:5c4d7b2438d3	1678	\| ( ext[3] ) );
switches	0:5c4d7b2438d3	1679
switches	0:5c4d7b2438d3	1680	if( ext_size + 4 > ext_len )
switches	0:5c4d7b2438d3	1681	{
switches	0:5c4d7b2438d3	1682	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server hello message" ) );
switches	0:5c4d7b2438d3	1683	return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
switches	0:5c4d7b2438d3	1684	}
switches	0:5c4d7b2438d3	1685
switches	0:5c4d7b2438d3	1686	switch( ext_id )
switches	0:5c4d7b2438d3	1687	{
switches	0:5c4d7b2438d3	1688	case MBEDTLS_TLS_EXT_RENEGOTIATION_INFO:
switches	0:5c4d7b2438d3	1689	MBEDTLS_SSL_DEBUG_MSG( 3, ( "found renegotiation extension" ) );
switches	0:5c4d7b2438d3	1690	#if defined(MBEDTLS_SSL_RENEGOTIATION)
switches	0:5c4d7b2438d3	1691	renegotiation_info_seen = 1;
switches	0:5c4d7b2438d3	1692	#endif
switches	0:5c4d7b2438d3	1693
switches	0:5c4d7b2438d3	1694	if( ( ret = ssl_parse_renegotiation_info( ssl, ext + 4,
switches	0:5c4d7b2438d3	1695	ext_size ) ) != 0 )
switches	0:5c4d7b2438d3	1696	return( ret );
switches	0:5c4d7b2438d3	1697
switches	0:5c4d7b2438d3	1698	break;
switches	0:5c4d7b2438d3	1699
switches	0:5c4d7b2438d3	1700	#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
switches	0:5c4d7b2438d3	1701	case MBEDTLS_TLS_EXT_MAX_FRAGMENT_LENGTH:
switches	0:5c4d7b2438d3	1702	MBEDTLS_SSL_DEBUG_MSG( 3, ( "found max_fragment_length extension" ) );
switches	0:5c4d7b2438d3	1703
switches	0:5c4d7b2438d3	1704	if( ( ret = ssl_parse_max_fragment_length_ext( ssl,
switches	0:5c4d7b2438d3	1705	ext + 4, ext_size ) ) != 0 )
switches	0:5c4d7b2438d3	1706	{
switches	0:5c4d7b2438d3	1707	return( ret );
switches	0:5c4d7b2438d3	1708	}
switches	0:5c4d7b2438d3	1709
switches	0:5c4d7b2438d3	1710	break;
switches	0:5c4d7b2438d3	1711	#endif /* MBEDTLS_SSL_MAX_FRAGMENT_LENGTH */
switches	0:5c4d7b2438d3	1712
switches	0:5c4d7b2438d3	1713	#if defined(MBEDTLS_SSL_TRUNCATED_HMAC)
switches	0:5c4d7b2438d3	1714	case MBEDTLS_TLS_EXT_TRUNCATED_HMAC:
switches	0:5c4d7b2438d3	1715	MBEDTLS_SSL_DEBUG_MSG( 3, ( "found truncated_hmac extension" ) );
switches	0:5c4d7b2438d3	1716
switches	0:5c4d7b2438d3	1717	if( ( ret = ssl_parse_truncated_hmac_ext( ssl,
switches	0:5c4d7b2438d3	1718	ext + 4, ext_size ) ) != 0 )
switches	0:5c4d7b2438d3	1719	{
switches	0:5c4d7b2438d3	1720	return( ret );
switches	0:5c4d7b2438d3	1721	}
switches	0:5c4d7b2438d3	1722
switches	0:5c4d7b2438d3	1723	break;
switches	0:5c4d7b2438d3	1724	#endif /* MBEDTLS_SSL_TRUNCATED_HMAC */
switches	0:5c4d7b2438d3	1725
switches	0:5c4d7b2438d3	1726	#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
switches	0:5c4d7b2438d3	1727	case MBEDTLS_TLS_EXT_ENCRYPT_THEN_MAC:
switches	0:5c4d7b2438d3	1728	MBEDTLS_SSL_DEBUG_MSG( 3, ( "found encrypt_then_mac extension" ) );
switches	0:5c4d7b2438d3	1729
switches	0:5c4d7b2438d3	1730	if( ( ret = ssl_parse_encrypt_then_mac_ext( ssl,
switches	0:5c4d7b2438d3	1731	ext + 4, ext_size ) ) != 0 )
switches	0:5c4d7b2438d3	1732	{
switches	0:5c4d7b2438d3	1733	return( ret );
switches	0:5c4d7b2438d3	1734	}
switches	0:5c4d7b2438d3	1735
switches	0:5c4d7b2438d3	1736	break;
switches	0:5c4d7b2438d3	1737	#endif /* MBEDTLS_SSL_ENCRYPT_THEN_MAC */
switches	0:5c4d7b2438d3	1738
switches	0:5c4d7b2438d3	1739	#if defined(MBEDTLS_SSL_EXTENDED_MASTER_SECRET)
switches	0:5c4d7b2438d3	1740	case MBEDTLS_TLS_EXT_EXTENDED_MASTER_SECRET:
switches	0:5c4d7b2438d3	1741	MBEDTLS_SSL_DEBUG_MSG( 3, ( "found extended_master_secret extension" ) );
switches	0:5c4d7b2438d3	1742
switches	0:5c4d7b2438d3	1743	if( ( ret = ssl_parse_extended_ms_ext( ssl,
switches	0:5c4d7b2438d3	1744	ext + 4, ext_size ) ) != 0 )
switches	0:5c4d7b2438d3	1745	{
switches	0:5c4d7b2438d3	1746	return( ret );
switches	0:5c4d7b2438d3	1747	}
switches	0:5c4d7b2438d3	1748
switches	0:5c4d7b2438d3	1749	break;
switches	0:5c4d7b2438d3	1750	#endif /* MBEDTLS_SSL_EXTENDED_MASTER_SECRET */
switches	0:5c4d7b2438d3	1751
switches	0:5c4d7b2438d3	1752	#if defined(MBEDTLS_SSL_SESSION_TICKETS)
switches	0:5c4d7b2438d3	1753	case MBEDTLS_TLS_EXT_SESSION_TICKET:
switches	0:5c4d7b2438d3	1754	MBEDTLS_SSL_DEBUG_MSG( 3, ( "found session_ticket extension" ) );
switches	0:5c4d7b2438d3	1755
switches	0:5c4d7b2438d3	1756	if( ( ret = ssl_parse_session_ticket_ext( ssl,
switches	0:5c4d7b2438d3	1757	ext + 4, ext_size ) ) != 0 )
switches	0:5c4d7b2438d3	1758	{
switches	0:5c4d7b2438d3	1759	return( ret );
switches	0:5c4d7b2438d3	1760	}
switches	0:5c4d7b2438d3	1761
switches	0:5c4d7b2438d3	1762	break;
switches	0:5c4d7b2438d3	1763	#endif /* MBEDTLS_SSL_SESSION_TICKETS */
switches	0:5c4d7b2438d3	1764
switches	0:5c4d7b2438d3	1765	#if defined(MBEDTLS_ECDH_C) \|\| defined(MBEDTLS_ECDSA_C) \|\| \
switches	0:5c4d7b2438d3	1766	defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
switches	0:5c4d7b2438d3	1767	case MBEDTLS_TLS_EXT_SUPPORTED_POINT_FORMATS:
switches	0:5c4d7b2438d3	1768	MBEDTLS_SSL_DEBUG_MSG( 3, ( "found supported_point_formats extension" ) );
switches	0:5c4d7b2438d3	1769
switches	0:5c4d7b2438d3	1770	if( ( ret = ssl_parse_supported_point_formats_ext( ssl,
switches	0:5c4d7b2438d3	1771	ext + 4, ext_size ) ) != 0 )
switches	0:5c4d7b2438d3	1772	{
switches	0:5c4d7b2438d3	1773	return( ret );
switches	0:5c4d7b2438d3	1774	}
switches	0:5c4d7b2438d3	1775
switches	0:5c4d7b2438d3	1776	break;
switches	0:5c4d7b2438d3	1777	#endif /* MBEDTLS_ECDH_C \|\| MBEDTLS_ECDSA_C \|\|
switches	0:5c4d7b2438d3	1778	MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED */
switches	0:5c4d7b2438d3	1779
switches	0:5c4d7b2438d3	1780	#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
switches	0:5c4d7b2438d3	1781	case MBEDTLS_TLS_EXT_ECJPAKE_KKPP:
switches	0:5c4d7b2438d3	1782	MBEDTLS_SSL_DEBUG_MSG( 3, ( "found ecjpake_kkpp extension" ) );
switches	0:5c4d7b2438d3	1783
switches	0:5c4d7b2438d3	1784	if( ( ret = ssl_parse_ecjpake_kkpp( ssl,
switches	0:5c4d7b2438d3	1785	ext + 4, ext_size ) ) != 0 )
switches	0:5c4d7b2438d3	1786	{
switches	0:5c4d7b2438d3	1787	return( ret );
switches	0:5c4d7b2438d3	1788	}
switches	0:5c4d7b2438d3	1789
switches	0:5c4d7b2438d3	1790	break;
switches	0:5c4d7b2438d3	1791	#endif /* MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED */
switches	0:5c4d7b2438d3	1792
switches	0:5c4d7b2438d3	1793	#if defined(MBEDTLS_SSL_ALPN)
switches	0:5c4d7b2438d3	1794	case MBEDTLS_TLS_EXT_ALPN:
switches	0:5c4d7b2438d3	1795	MBEDTLS_SSL_DEBUG_MSG( 3, ( "found alpn extension" ) );
switches	0:5c4d7b2438d3	1796
switches	0:5c4d7b2438d3	1797	if( ( ret = ssl_parse_alpn_ext( ssl, ext + 4, ext_size ) ) != 0 )
switches	0:5c4d7b2438d3	1798	return( ret );
switches	0:5c4d7b2438d3	1799
switches	0:5c4d7b2438d3	1800	break;
switches	0:5c4d7b2438d3	1801	#endif /* MBEDTLS_SSL_ALPN */
switches	0:5c4d7b2438d3	1802
switches	0:5c4d7b2438d3	1803	default:
switches	0:5c4d7b2438d3	1804	MBEDTLS_SSL_DEBUG_MSG( 3, ( "unknown extension found: %d (ignoring)",
switches	0:5c4d7b2438d3	1805	ext_id ) );
switches	0:5c4d7b2438d3	1806	}
switches	0:5c4d7b2438d3	1807
switches	0:5c4d7b2438d3	1808	ext_len -= 4 + ext_size;
switches	0:5c4d7b2438d3	1809	ext += 4 + ext_size;
switches	0:5c4d7b2438d3	1810
switches	0:5c4d7b2438d3	1811	if( ext_len > 0 && ext_len < 4 )
switches	0:5c4d7b2438d3	1812	{
switches	0:5c4d7b2438d3	1813	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server hello message" ) );
switches	0:5c4d7b2438d3	1814	return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
switches	0:5c4d7b2438d3	1815	}
switches	0:5c4d7b2438d3	1816	}
switches	0:5c4d7b2438d3	1817
switches	0:5c4d7b2438d3	1818	/*
switches	0:5c4d7b2438d3	1819	* Renegotiation security checks
switches	0:5c4d7b2438d3	1820	*/
switches	0:5c4d7b2438d3	1821	if( ssl->secure_renegotiation == MBEDTLS_SSL_LEGACY_RENEGOTIATION &&
switches	0:5c4d7b2438d3	1822	ssl->conf->allow_legacy_renegotiation == MBEDTLS_SSL_LEGACY_BREAK_HANDSHAKE )
switches	0:5c4d7b2438d3	1823	{
switches	0:5c4d7b2438d3	1824	MBEDTLS_SSL_DEBUG_MSG( 1, ( "legacy renegotiation, breaking off handshake" ) );
switches	0:5c4d7b2438d3	1825	handshake_failure = 1;
switches	0:5c4d7b2438d3	1826	}
switches	0:5c4d7b2438d3	1827	#if defined(MBEDTLS_SSL_RENEGOTIATION)
switches	0:5c4d7b2438d3	1828	else if( ssl->renego_status == MBEDTLS_SSL_RENEGOTIATION_IN_PROGRESS &&
switches	0:5c4d7b2438d3	1829	ssl->secure_renegotiation == MBEDTLS_SSL_SECURE_RENEGOTIATION &&
switches	0:5c4d7b2438d3	1830	renegotiation_info_seen == 0 )
switches	0:5c4d7b2438d3	1831	{
switches	0:5c4d7b2438d3	1832	MBEDTLS_SSL_DEBUG_MSG( 1, ( "renegotiation_info extension missing (secure)" ) );
switches	0:5c4d7b2438d3	1833	handshake_failure = 1;
switches	0:5c4d7b2438d3	1834	}
switches	0:5c4d7b2438d3	1835	else if( ssl->renego_status == MBEDTLS_SSL_RENEGOTIATION_IN_PROGRESS &&
switches	0:5c4d7b2438d3	1836	ssl->secure_renegotiation == MBEDTLS_SSL_LEGACY_RENEGOTIATION &&
switches	0:5c4d7b2438d3	1837	ssl->conf->allow_legacy_renegotiation == MBEDTLS_SSL_LEGACY_NO_RENEGOTIATION )
switches	0:5c4d7b2438d3	1838	{
switches	0:5c4d7b2438d3	1839	MBEDTLS_SSL_DEBUG_MSG( 1, ( "legacy renegotiation not allowed" ) );
switches	0:5c4d7b2438d3	1840	handshake_failure = 1;
switches	0:5c4d7b2438d3	1841	}
switches	0:5c4d7b2438d3	1842	else if( ssl->renego_status == MBEDTLS_SSL_RENEGOTIATION_IN_PROGRESS &&
switches	0:5c4d7b2438d3	1843	ssl->secure_renegotiation == MBEDTLS_SSL_LEGACY_RENEGOTIATION &&
switches	0:5c4d7b2438d3	1844	renegotiation_info_seen == 1 )
switches	0:5c4d7b2438d3	1845	{
switches	0:5c4d7b2438d3	1846	MBEDTLS_SSL_DEBUG_MSG( 1, ( "renegotiation_info extension present (legacy)" ) );
switches	0:5c4d7b2438d3	1847	handshake_failure = 1;
switches	0:5c4d7b2438d3	1848	}
switches	0:5c4d7b2438d3	1849	#endif /* MBEDTLS_SSL_RENEGOTIATION */
switches	0:5c4d7b2438d3	1850
switches	0:5c4d7b2438d3	1851	if( handshake_failure == 1 )
switches	0:5c4d7b2438d3	1852	{
switches	0:5c4d7b2438d3	1853	if( ( ret = mbedtls_ssl_send_fatal_handshake_failure( ssl ) ) != 0 )
switches	0:5c4d7b2438d3	1854	return( ret );
switches	0:5c4d7b2438d3	1855
switches	0:5c4d7b2438d3	1856	return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
switches	0:5c4d7b2438d3	1857	}
switches	0:5c4d7b2438d3	1858
switches	0:5c4d7b2438d3	1859	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= parse server hello" ) );
switches	0:5c4d7b2438d3	1860
switches	0:5c4d7b2438d3	1861	return( 0 );
switches	0:5c4d7b2438d3	1862	}
switches	0:5c4d7b2438d3	1863
switches	0:5c4d7b2438d3	1864	#if defined(MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED) \|\| \
switches	0:5c4d7b2438d3	1865	defined(MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED)
switches	0:5c4d7b2438d3	1866	static int ssl_parse_server_dh_params( mbedtls_ssl_context ssl, unsigned char *p,
switches	0:5c4d7b2438d3	1867	unsigned char *end )
switches	0:5c4d7b2438d3	1868	{
switches	0:5c4d7b2438d3	1869	int ret = MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE;
switches	0:5c4d7b2438d3	1870
switches	0:5c4d7b2438d3	1871	/*
switches	0:5c4d7b2438d3	1872	* Ephemeral DH parameters:
switches	0:5c4d7b2438d3	1873	*
switches	0:5c4d7b2438d3	1874	* struct {
switches	0:5c4d7b2438d3	1875	* opaque dh_p<1..2^16-1>;
switches	0:5c4d7b2438d3	1876	* opaque dh_g<1..2^16-1>;
switches	0:5c4d7b2438d3	1877	* opaque dh_Ys<1..2^16-1>;
switches	0:5c4d7b2438d3	1878	* } ServerDHParams;
switches	0:5c4d7b2438d3	1879	*/
switches	0:5c4d7b2438d3	1880	if( ( ret = mbedtls_dhm_read_params( &ssl->handshake->dhm_ctx, p, end ) ) != 0 )
switches	0:5c4d7b2438d3	1881	{
switches	0:5c4d7b2438d3	1882	MBEDTLS_SSL_DEBUG_RET( 2, ( "mbedtls_dhm_read_params" ), ret );
switches	0:5c4d7b2438d3	1883	return( ret );
switches	0:5c4d7b2438d3	1884	}
switches	0:5c4d7b2438d3	1885
switches	0:5c4d7b2438d3	1886	if( ssl->handshake->dhm_ctx.len * 8 < ssl->conf->dhm_min_bitlen )
switches	0:5c4d7b2438d3	1887	{
switches	0:5c4d7b2438d3	1888	MBEDTLS_SSL_DEBUG_MSG( 1, ( "DHM prime too short: %d < %d",
switches	0:5c4d7b2438d3	1889	ssl->handshake->dhm_ctx.len * 8,
switches	0:5c4d7b2438d3	1890	ssl->conf->dhm_min_bitlen ) );
switches	0:5c4d7b2438d3	1891	return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
switches	0:5c4d7b2438d3	1892	}
switches	0:5c4d7b2438d3	1893
switches	0:5c4d7b2438d3	1894	MBEDTLS_SSL_DEBUG_MPI( 3, "DHM: P ", &ssl->handshake->dhm_ctx.P );
switches	0:5c4d7b2438d3	1895	MBEDTLS_SSL_DEBUG_MPI( 3, "DHM: G ", &ssl->handshake->dhm_ctx.G );
switches	0:5c4d7b2438d3	1896	MBEDTLS_SSL_DEBUG_MPI( 3, "DHM: GY", &ssl->handshake->dhm_ctx.GY );
switches	0:5c4d7b2438d3	1897
switches	0:5c4d7b2438d3	1898	return( ret );
switches	0:5c4d7b2438d3	1899	}
switches	0:5c4d7b2438d3	1900	#endif /* MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED \|\|
switches	0:5c4d7b2438d3	1901	MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED */
switches	0:5c4d7b2438d3	1902
switches	0:5c4d7b2438d3	1903	#if defined(MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED) \|\| \
switches	0:5c4d7b2438d3	1904	defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED) \|\| \
switches	0:5c4d7b2438d3	1905	defined(MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED) \|\| \
switches	0:5c4d7b2438d3	1906	defined(MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED) \|\| \
switches	0:5c4d7b2438d3	1907	defined(MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED)
switches	0:5c4d7b2438d3	1908	static int ssl_check_server_ecdh_params( const mbedtls_ssl_context *ssl )
switches	0:5c4d7b2438d3	1909	{
switches	0:5c4d7b2438d3	1910	const mbedtls_ecp_curve_info *curve_info;
switches	0:5c4d7b2438d3	1911
switches	0:5c4d7b2438d3	1912	curve_info = mbedtls_ecp_curve_info_from_grp_id( ssl->handshake->ecdh_ctx.grp.id );
switches	0:5c4d7b2438d3	1913	if( curve_info == NULL )
switches	0:5c4d7b2438d3	1914	{
switches	0:5c4d7b2438d3	1915	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
switches	0:5c4d7b2438d3	1916	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
switches	0:5c4d7b2438d3	1917	}
switches	0:5c4d7b2438d3	1918
switches	0:5c4d7b2438d3	1919	MBEDTLS_SSL_DEBUG_MSG( 2, ( "ECDH curve: %s", curve_info->name ) );
switches	0:5c4d7b2438d3	1920
switches	0:5c4d7b2438d3	1921	#if defined(MBEDTLS_ECP_C)
switches	0:5c4d7b2438d3	1922	if( mbedtls_ssl_check_curve( ssl, ssl->handshake->ecdh_ctx.grp.id ) != 0 )
switches	0:5c4d7b2438d3	1923	#else
switches	0:5c4d7b2438d3	1924	if( ssl->handshake->ecdh_ctx.grp.nbits < 163 \|\|
switches	0:5c4d7b2438d3	1925	ssl->handshake->ecdh_ctx.grp.nbits > 521 )
switches	0:5c4d7b2438d3	1926	#endif
switches	0:5c4d7b2438d3	1927	return( -1 );
switches	0:5c4d7b2438d3	1928
switches	0:5c4d7b2438d3	1929	MBEDTLS_SSL_DEBUG_ECP( 3, "ECDH: Qp", &ssl->handshake->ecdh_ctx.Qp );
switches	0:5c4d7b2438d3	1930
switches	0:5c4d7b2438d3	1931	return( 0 );
switches	0:5c4d7b2438d3	1932	}
switches	0:5c4d7b2438d3	1933	#endif /* MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED \|\|
switches	0:5c4d7b2438d3	1934	MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED \|\|
switches	0:5c4d7b2438d3	1935	MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED \|\|
switches	0:5c4d7b2438d3	1936	MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED \|\|
switches	0:5c4d7b2438d3	1937	MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED */
switches	0:5c4d7b2438d3	1938
switches	0:5c4d7b2438d3	1939	#if defined(MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED) \|\| \
switches	0:5c4d7b2438d3	1940	defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED) \|\| \
switches	0:5c4d7b2438d3	1941	defined(MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED)
switches	0:5c4d7b2438d3	1942	static int ssl_parse_server_ecdh_params( mbedtls_ssl_context *ssl,
switches	0:5c4d7b2438d3	1943	unsigned char **p,
switches	0:5c4d7b2438d3	1944	unsigned char *end )
switches	0:5c4d7b2438d3	1945	{
switches	0:5c4d7b2438d3	1946	int ret = MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE;
switches	0:5c4d7b2438d3	1947
switches	0:5c4d7b2438d3	1948	/*
switches	0:5c4d7b2438d3	1949	* Ephemeral ECDH parameters:
switches	0:5c4d7b2438d3	1950	*
switches	0:5c4d7b2438d3	1951	* struct {
switches	0:5c4d7b2438d3	1952	* ECParameters curve_params;
switches	0:5c4d7b2438d3	1953	* ECPoint public;
switches	0:5c4d7b2438d3	1954	* } ServerECDHParams;
switches	0:5c4d7b2438d3	1955	*/
switches	0:5c4d7b2438d3	1956	if( ( ret = mbedtls_ecdh_read_params( &ssl->handshake->ecdh_ctx,
switches	0:5c4d7b2438d3	1957	(const unsigned char **) p, end ) ) != 0 )
switches	0:5c4d7b2438d3	1958	{
switches	0:5c4d7b2438d3	1959	MBEDTLS_SSL_DEBUG_RET( 1, ( "mbedtls_ecdh_read_params" ), ret );
switches	0:5c4d7b2438d3	1960	return( ret );
switches	0:5c4d7b2438d3	1961	}
switches	0:5c4d7b2438d3	1962
switches	0:5c4d7b2438d3	1963	if( ssl_check_server_ecdh_params( ssl ) != 0 )
switches	0:5c4d7b2438d3	1964	{
switches	0:5c4d7b2438d3	1965	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server key exchange message (ECDHE curve)" ) );
switches	0:5c4d7b2438d3	1966	return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
switches	0:5c4d7b2438d3	1967	}
switches	0:5c4d7b2438d3	1968
switches	0:5c4d7b2438d3	1969	return( ret );
switches	0:5c4d7b2438d3	1970	}
switches	0:5c4d7b2438d3	1971	#endif /* MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED \|\|
switches	0:5c4d7b2438d3	1972	MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED \|\|
switches	0:5c4d7b2438d3	1973	MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED */
switches	0:5c4d7b2438d3	1974
switches	0:5c4d7b2438d3	1975	#if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
switches	0:5c4d7b2438d3	1976	static int ssl_parse_server_psk_hint( mbedtls_ssl_context *ssl,
switches	0:5c4d7b2438d3	1977	unsigned char **p,
switches	0:5c4d7b2438d3	1978	unsigned char *end )
switches	0:5c4d7b2438d3	1979	{
switches	0:5c4d7b2438d3	1980	int ret = MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE;
switches	0:5c4d7b2438d3	1981	size_t len;
switches	0:5c4d7b2438d3	1982	((void) ssl);
switches	0:5c4d7b2438d3	1983
switches	0:5c4d7b2438d3	1984	/*
switches	0:5c4d7b2438d3	1985	* PSK parameters:
switches	0:5c4d7b2438d3	1986	*
switches	0:5c4d7b2438d3	1987	* opaque psk_identity_hint<0..2^16-1>;
switches	0:5c4d7b2438d3	1988	*/
switches	0:5c4d7b2438d3	1989	len = (p)[0] << 8 \| (p)[1];
switches	0:5c4d7b2438d3	1990	*p += 2;
switches	0:5c4d7b2438d3	1991
switches	0:5c4d7b2438d3	1992	if( (*p) + len > end )
switches	0:5c4d7b2438d3	1993	{
switches	0:5c4d7b2438d3	1994	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server key exchange message (psk_identity_hint length)" ) );
switches	0:5c4d7b2438d3	1995	return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
switches	0:5c4d7b2438d3	1996	}
switches	0:5c4d7b2438d3	1997
switches	0:5c4d7b2438d3	1998	/*
switches	0:5c4d7b2438d3	1999	* Note: we currently ignore the PKS identity hint, as we only allow one
switches	0:5c4d7b2438d3	2000	* PSK to be provisionned on the client. This could be changed later if
switches	0:5c4d7b2438d3	2001	* someone needs that feature.
switches	0:5c4d7b2438d3	2002	*/
switches	0:5c4d7b2438d3	2003	*p += len;
switches	0:5c4d7b2438d3	2004	ret = 0;
switches	0:5c4d7b2438d3	2005
switches	0:5c4d7b2438d3	2006	return( ret );
switches	0:5c4d7b2438d3	2007	}
switches	0:5c4d7b2438d3	2008	#endif /* MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED */
switches	0:5c4d7b2438d3	2009
switches	0:5c4d7b2438d3	2010	#if defined(MBEDTLS_KEY_EXCHANGE_RSA_ENABLED) \|\| \
switches	0:5c4d7b2438d3	2011	defined(MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED)
switches	0:5c4d7b2438d3	2012	/*
switches	0:5c4d7b2438d3	2013	* Generate a pre-master secret and encrypt it with the server's RSA key
switches	0:5c4d7b2438d3	2014	*/
switches	0:5c4d7b2438d3	2015	static int ssl_write_encrypted_pms( mbedtls_ssl_context *ssl,
switches	0:5c4d7b2438d3	2016	size_t offset, size_t *olen,
switches	0:5c4d7b2438d3	2017	size_t pms_offset )
switches	0:5c4d7b2438d3	2018	{
switches	0:5c4d7b2438d3	2019	int ret;
switches	0:5c4d7b2438d3	2020	size_t len_bytes = ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 ? 0 : 2;
switches	0:5c4d7b2438d3	2021	unsigned char *p = ssl->handshake->premaster + pms_offset;
switches	0:5c4d7b2438d3	2022
switches	0:5c4d7b2438d3	2023	if( offset + len_bytes > MBEDTLS_SSL_MAX_CONTENT_LEN )
switches	0:5c4d7b2438d3	2024	{
switches	0:5c4d7b2438d3	2025	MBEDTLS_SSL_DEBUG_MSG( 1, ( "buffer too small for encrypted pms" ) );
switches	0:5c4d7b2438d3	2026	return( MBEDTLS_ERR_SSL_BUFFER_TOO_SMALL );
switches	0:5c4d7b2438d3	2027	}
switches	0:5c4d7b2438d3	2028
switches	0:5c4d7b2438d3	2029	/*
switches	0:5c4d7b2438d3	2030	* Generate (part of) the pre-master as
switches	0:5c4d7b2438d3	2031	* struct {
switches	0:5c4d7b2438d3	2032	* ProtocolVersion client_version;
switches	0:5c4d7b2438d3	2033	* opaque random[46];
switches	0:5c4d7b2438d3	2034	* } PreMasterSecret;
switches	0:5c4d7b2438d3	2035	*/
switches	0:5c4d7b2438d3	2036	mbedtls_ssl_write_version( ssl->conf->max_major_ver, ssl->conf->max_minor_ver,
switches	0:5c4d7b2438d3	2037	ssl->conf->transport, p );
switches	0:5c4d7b2438d3	2038
switches	0:5c4d7b2438d3	2039	if( ( ret = ssl->conf->f_rng( ssl->conf->p_rng, p + 2, 46 ) ) != 0 )
switches	0:5c4d7b2438d3	2040	{
switches	0:5c4d7b2438d3	2041	MBEDTLS_SSL_DEBUG_RET( 1, "f_rng", ret );
switches	0:5c4d7b2438d3	2042	return( ret );
switches	0:5c4d7b2438d3	2043	}
switches	0:5c4d7b2438d3	2044
switches	0:5c4d7b2438d3	2045	ssl->handshake->pmslen = 48;
switches	0:5c4d7b2438d3	2046
switches	0:5c4d7b2438d3	2047	if( ssl->session_negotiate->peer_cert == NULL )
switches	0:5c4d7b2438d3	2048	{
switches	0:5c4d7b2438d3	2049	MBEDTLS_SSL_DEBUG_MSG( 2, ( "certificate required" ) );
switches	0:5c4d7b2438d3	2050	return( MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE );
switches	0:5c4d7b2438d3	2051	}
switches	0:5c4d7b2438d3	2052
switches	0:5c4d7b2438d3	2053	/*
switches	0:5c4d7b2438d3	2054	* Now write it out, encrypted
switches	0:5c4d7b2438d3	2055	*/
switches	0:5c4d7b2438d3	2056	if( ! mbedtls_pk_can_do( &ssl->session_negotiate->peer_cert->pk,
switches	0:5c4d7b2438d3	2057	MBEDTLS_PK_RSA ) )
switches	0:5c4d7b2438d3	2058	{
switches	0:5c4d7b2438d3	2059	MBEDTLS_SSL_DEBUG_MSG( 1, ( "certificate key type mismatch" ) );
switches	0:5c4d7b2438d3	2060	return( MBEDTLS_ERR_SSL_PK_TYPE_MISMATCH );
switches	0:5c4d7b2438d3	2061	}
switches	0:5c4d7b2438d3	2062
switches	0:5c4d7b2438d3	2063	if( ( ret = mbedtls_pk_encrypt( &ssl->session_negotiate->peer_cert->pk,
switches	0:5c4d7b2438d3	2064	p, ssl->handshake->pmslen,
switches	0:5c4d7b2438d3	2065	ssl->out_msg + offset + len_bytes, olen,
switches	0:5c4d7b2438d3	2066	MBEDTLS_SSL_MAX_CONTENT_LEN - offset - len_bytes,
switches	0:5c4d7b2438d3	2067	ssl->conf->f_rng, ssl->conf->p_rng ) ) != 0 )
switches	0:5c4d7b2438d3	2068	{
switches	0:5c4d7b2438d3	2069	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_rsa_pkcs1_encrypt", ret );
switches	0:5c4d7b2438d3	2070	return( ret );
switches	0:5c4d7b2438d3	2071	}
switches	0:5c4d7b2438d3	2072
switches	0:5c4d7b2438d3	2073	#if defined(MBEDTLS_SSL_PROTO_TLS1) \|\| defined(MBEDTLS_SSL_PROTO_TLS1_1) \|\| \
switches	0:5c4d7b2438d3	2074	defined(MBEDTLS_SSL_PROTO_TLS1_2)
switches	0:5c4d7b2438d3	2075	if( len_bytes == 2 )
switches	0:5c4d7b2438d3	2076	{
switches	0:5c4d7b2438d3	2077	ssl->out_msg[offset+0] = (unsigned char)( *olen >> 8 );
switches	0:5c4d7b2438d3	2078	ssl->out_msg[offset+1] = (unsigned char)( *olen );
switches	0:5c4d7b2438d3	2079	*olen += 2;
switches	0:5c4d7b2438d3	2080	}
switches	0:5c4d7b2438d3	2081	#endif
switches	0:5c4d7b2438d3	2082
switches	0:5c4d7b2438d3	2083	return( 0 );
switches	0:5c4d7b2438d3	2084	}
switches	0:5c4d7b2438d3	2085	#endif /* MBEDTLS_KEY_EXCHANGE_RSA_ENABLED \|\|
switches	0:5c4d7b2438d3	2086	MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED */
switches	0:5c4d7b2438d3	2087
switches	0:5c4d7b2438d3	2088	#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
switches	0:5c4d7b2438d3	2089	#if defined(MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED) \|\| \
switches	0:5c4d7b2438d3	2090	defined(MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED) \|\| \
switches	0:5c4d7b2438d3	2091	defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED)
switches	0:5c4d7b2438d3	2092	static int ssl_parse_signature_algorithm( mbedtls_ssl_context *ssl,
switches	0:5c4d7b2438d3	2093	unsigned char **p,
switches	0:5c4d7b2438d3	2094	unsigned char *end,
switches	0:5c4d7b2438d3	2095	mbedtls_md_type_t *md_alg,
switches	0:5c4d7b2438d3	2096	mbedtls_pk_type_t *pk_alg )
switches	0:5c4d7b2438d3	2097	{
switches	0:5c4d7b2438d3	2098	((void) ssl);
switches	0:5c4d7b2438d3	2099	*md_alg = MBEDTLS_MD_NONE;
switches	0:5c4d7b2438d3	2100	*pk_alg = MBEDTLS_PK_NONE;
switches	0:5c4d7b2438d3	2101
switches	0:5c4d7b2438d3	2102	/* Only in TLS 1.2 */
switches	0:5c4d7b2438d3	2103	if( ssl->minor_ver != MBEDTLS_SSL_MINOR_VERSION_3 )
switches	0:5c4d7b2438d3	2104	{
switches	0:5c4d7b2438d3	2105	return( 0 );
switches	0:5c4d7b2438d3	2106	}
switches	0:5c4d7b2438d3	2107
switches	0:5c4d7b2438d3	2108	if( (*p) + 2 > end )
switches	0:5c4d7b2438d3	2109	return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
switches	0:5c4d7b2438d3	2110
switches	0:5c4d7b2438d3	2111	/*
switches	0:5c4d7b2438d3	2112	* Get hash algorithm
switches	0:5c4d7b2438d3	2113	*/
switches	0:5c4d7b2438d3	2114	if( ( md_alg = mbedtls_ssl_md_alg_from_hash( (p)[0] ) ) == MBEDTLS_MD_NONE )
switches	0:5c4d7b2438d3	2115	{
switches	0:5c4d7b2438d3	2116	MBEDTLS_SSL_DEBUG_MSG( 1, ( "Server used unsupported "
switches	0:5c4d7b2438d3	2117	"HashAlgorithm %d", *(p)[0] ) );
switches	0:5c4d7b2438d3	2118	return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
switches	0:5c4d7b2438d3	2119	}
switches	0:5c4d7b2438d3	2120
switches	0:5c4d7b2438d3	2121	/*
switches	0:5c4d7b2438d3	2122	* Get signature algorithm
switches	0:5c4d7b2438d3	2123	*/
switches	0:5c4d7b2438d3	2124	if( ( pk_alg = mbedtls_ssl_pk_alg_from_sig( (p)[1] ) ) == MBEDTLS_PK_NONE )
switches	0:5c4d7b2438d3	2125	{
switches	0:5c4d7b2438d3	2126	MBEDTLS_SSL_DEBUG_MSG( 1, ( "server used unsupported "
switches	0:5c4d7b2438d3	2127	"SignatureAlgorithm %d", (*p)[1] ) );
switches	0:5c4d7b2438d3	2128	return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
switches	0:5c4d7b2438d3	2129	}
switches	0:5c4d7b2438d3	2130
switches	0:5c4d7b2438d3	2131	/*
switches	0:5c4d7b2438d3	2132	* Check if the hash is acceptable
switches	0:5c4d7b2438d3	2133	*/
switches	0:5c4d7b2438d3	2134	if( mbedtls_ssl_check_sig_hash( ssl, *md_alg ) != 0 )
switches	0:5c4d7b2438d3	2135	{
switches	0:5c4d7b2438d3	2136	MBEDTLS_SSL_DEBUG_MSG( 1, ( "server used HashAlgorithm "
switches	0:5c4d7b2438d3	2137	"that was not offered" ) );
switches	0:5c4d7b2438d3	2138	return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
switches	0:5c4d7b2438d3	2139	}
switches	0:5c4d7b2438d3	2140
switches	0:5c4d7b2438d3	2141	MBEDTLS_SSL_DEBUG_MSG( 2, ( "Server used SignatureAlgorithm %d", (*p)[1] ) );
switches	0:5c4d7b2438d3	2142	MBEDTLS_SSL_DEBUG_MSG( 2, ( "Server used HashAlgorithm %d", (*p)[0] ) );
switches	0:5c4d7b2438d3	2143	*p += 2;
switches	0:5c4d7b2438d3	2144
switches	0:5c4d7b2438d3	2145	return( 0 );
switches	0:5c4d7b2438d3	2146	}
switches	0:5c4d7b2438d3	2147	#endif /* MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED \|\|
switches	0:5c4d7b2438d3	2148	MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED \|\|
switches	0:5c4d7b2438d3	2149	MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED */
switches	0:5c4d7b2438d3	2150	#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
switches	0:5c4d7b2438d3	2151
switches	0:5c4d7b2438d3	2152	#if defined(MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED) \|\| \
switches	0:5c4d7b2438d3	2153	defined(MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED)
switches	0:5c4d7b2438d3	2154	static int ssl_get_ecdh_params_from_cert( mbedtls_ssl_context *ssl )
switches	0:5c4d7b2438d3	2155	{
switches	0:5c4d7b2438d3	2156	int ret;
switches	0:5c4d7b2438d3	2157	const mbedtls_ecp_keypair *peer_key;
switches	0:5c4d7b2438d3	2158
switches	0:5c4d7b2438d3	2159	if( ssl->session_negotiate->peer_cert == NULL )
switches	0:5c4d7b2438d3	2160	{
switches	0:5c4d7b2438d3	2161	MBEDTLS_SSL_DEBUG_MSG( 2, ( "certificate required" ) );
switches	0:5c4d7b2438d3	2162	return( MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE );
switches	0:5c4d7b2438d3	2163	}
switches	0:5c4d7b2438d3	2164
switches	0:5c4d7b2438d3	2165	if( ! mbedtls_pk_can_do( &ssl->session_negotiate->peer_cert->pk,
switches	0:5c4d7b2438d3	2166	MBEDTLS_PK_ECKEY ) )
switches	0:5c4d7b2438d3	2167	{
switches	0:5c4d7b2438d3	2168	MBEDTLS_SSL_DEBUG_MSG( 1, ( "server key not ECDH capable" ) );
switches	0:5c4d7b2438d3	2169	return( MBEDTLS_ERR_SSL_PK_TYPE_MISMATCH );
switches	0:5c4d7b2438d3	2170	}
switches	0:5c4d7b2438d3	2171
switches	0:5c4d7b2438d3	2172	peer_key = mbedtls_pk_ec( ssl->session_negotiate->peer_cert->pk );
switches	0:5c4d7b2438d3	2173
switches	0:5c4d7b2438d3	2174	if( ( ret = mbedtls_ecdh_get_params( &ssl->handshake->ecdh_ctx, peer_key,
switches	0:5c4d7b2438d3	2175	MBEDTLS_ECDH_THEIRS ) ) != 0 )
switches	0:5c4d7b2438d3	2176	{
switches	0:5c4d7b2438d3	2177	MBEDTLS_SSL_DEBUG_RET( 1, ( "mbedtls_ecdh_get_params" ), ret );
switches	0:5c4d7b2438d3	2178	return( ret );
switches	0:5c4d7b2438d3	2179	}
switches	0:5c4d7b2438d3	2180
switches	0:5c4d7b2438d3	2181	if( ssl_check_server_ecdh_params( ssl ) != 0 )
switches	0:5c4d7b2438d3	2182	{
switches	0:5c4d7b2438d3	2183	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server certificate (ECDH curve)" ) );
switches	0:5c4d7b2438d3	2184	return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE );
switches	0:5c4d7b2438d3	2185	}
switches	0:5c4d7b2438d3	2186
switches	0:5c4d7b2438d3	2187	return( ret );
switches	0:5c4d7b2438d3	2188	}
switches	0:5c4d7b2438d3	2189	#endif /* MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED) \|\|
switches	0:5c4d7b2438d3	2190	MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED */
switches	0:5c4d7b2438d3	2191
switches	0:5c4d7b2438d3	2192	static int ssl_parse_server_key_exchange( mbedtls_ssl_context *ssl )
switches	0:5c4d7b2438d3	2193	{
switches	0:5c4d7b2438d3	2194	int ret;
switches	0:5c4d7b2438d3	2195	const mbedtls_ssl_ciphersuite_t *ciphersuite_info = ssl->transform_negotiate->ciphersuite_info;
switches	0:5c4d7b2438d3	2196	unsigned char p, end;
switches	0:5c4d7b2438d3	2197
switches	0:5c4d7b2438d3	2198	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> parse server key exchange" ) );
switches	0:5c4d7b2438d3	2199
switches	0:5c4d7b2438d3	2200	#if defined(MBEDTLS_KEY_EXCHANGE_RSA_ENABLED)
switches	0:5c4d7b2438d3	2201	if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_RSA )
switches	0:5c4d7b2438d3	2202	{
switches	0:5c4d7b2438d3	2203	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip parse server key exchange" ) );
switches	0:5c4d7b2438d3	2204	ssl->state++;
switches	0:5c4d7b2438d3	2205	return( 0 );
switches	0:5c4d7b2438d3	2206	}
switches	0:5c4d7b2438d3	2207	((void) p);
switches	0:5c4d7b2438d3	2208	((void) end);
switches	0:5c4d7b2438d3	2209	#endif
switches	0:5c4d7b2438d3	2210
switches	0:5c4d7b2438d3	2211	#if defined(MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED) \|\| \
switches	0:5c4d7b2438d3	2212	defined(MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED)
switches	0:5c4d7b2438d3	2213	if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDH_RSA \|\|
switches	0:5c4d7b2438d3	2214	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA )
switches	0:5c4d7b2438d3	2215	{
switches	0:5c4d7b2438d3	2216	if( ( ret = ssl_get_ecdh_params_from_cert( ssl ) ) != 0 )
switches	0:5c4d7b2438d3	2217	{
switches	0:5c4d7b2438d3	2218	MBEDTLS_SSL_DEBUG_RET( 1, "ssl_get_ecdh_params_from_cert", ret );
switches	0:5c4d7b2438d3	2219	return( ret );
switches	0:5c4d7b2438d3	2220	}
switches	0:5c4d7b2438d3	2221
switches	0:5c4d7b2438d3	2222	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip parse server key exchange" ) );
switches	0:5c4d7b2438d3	2223	ssl->state++;
switches	0:5c4d7b2438d3	2224	return( 0 );
switches	0:5c4d7b2438d3	2225	}
switches	0:5c4d7b2438d3	2226	((void) p);
switches	0:5c4d7b2438d3	2227	((void) end);
switches	0:5c4d7b2438d3	2228	#endif /* MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED \|\|
switches	0:5c4d7b2438d3	2229	MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED */
switches	0:5c4d7b2438d3	2230
switches	0:5c4d7b2438d3	2231	if( ( ret = mbedtls_ssl_read_record( ssl ) ) != 0 )
switches	0:5c4d7b2438d3	2232	{
switches	0:5c4d7b2438d3	2233	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_read_record", ret );
switches	0:5c4d7b2438d3	2234	return( ret );
switches	0:5c4d7b2438d3	2235	}
switches	0:5c4d7b2438d3	2236
switches	0:5c4d7b2438d3	2237	if( ssl->in_msgtype != MBEDTLS_SSL_MSG_HANDSHAKE )
switches	0:5c4d7b2438d3	2238	{
switches	0:5c4d7b2438d3	2239	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server key exchange message" ) );
switches	0:5c4d7b2438d3	2240	return( MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE );
switches	0:5c4d7b2438d3	2241	}
switches	0:5c4d7b2438d3	2242
switches	0:5c4d7b2438d3	2243	/*
switches	0:5c4d7b2438d3	2244	* ServerKeyExchange may be skipped with PSK and RSA-PSK when the server
switches	0:5c4d7b2438d3	2245	* doesn't use a psk_identity_hint
switches	0:5c4d7b2438d3	2246	*/
switches	0:5c4d7b2438d3	2247	if( ssl->in_msg[0] != MBEDTLS_SSL_HS_SERVER_KEY_EXCHANGE )
switches	0:5c4d7b2438d3	2248	{
switches	0:5c4d7b2438d3	2249	if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_PSK \|\|
switches	0:5c4d7b2438d3	2250	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_RSA_PSK )
switches	0:5c4d7b2438d3	2251	{
switches	0:5c4d7b2438d3	2252	ssl->record_read = 1;
switches	0:5c4d7b2438d3	2253	goto exit;
switches	0:5c4d7b2438d3	2254	}
switches	0:5c4d7b2438d3	2255
switches	0:5c4d7b2438d3	2256	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server key exchange message" ) );
switches	0:5c4d7b2438d3	2257	return( MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE );
switches	0:5c4d7b2438d3	2258	}
switches	0:5c4d7b2438d3	2259
switches	0:5c4d7b2438d3	2260	p = ssl->in_msg + mbedtls_ssl_hs_hdr_len( ssl );
switches	0:5c4d7b2438d3	2261	end = ssl->in_msg + ssl->in_hslen;
switches	0:5c4d7b2438d3	2262	MBEDTLS_SSL_DEBUG_BUF( 3, "server key exchange", p, end - p );
switches	0:5c4d7b2438d3	2263
switches	0:5c4d7b2438d3	2264	#if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
switches	0:5c4d7b2438d3	2265	if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_PSK \|\|
switches	0:5c4d7b2438d3	2266	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_RSA_PSK \|\|
switches	0:5c4d7b2438d3	2267	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_DHE_PSK \|\|
switches	0:5c4d7b2438d3	2268	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_PSK )
switches	0:5c4d7b2438d3	2269	{
switches	0:5c4d7b2438d3	2270	if( ssl_parse_server_psk_hint( ssl, &p, end ) != 0 )
switches	0:5c4d7b2438d3	2271	{
switches	0:5c4d7b2438d3	2272	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server key exchange message" ) );
switches	0:5c4d7b2438d3	2273	return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
switches	0:5c4d7b2438d3	2274	}
switches	0:5c4d7b2438d3	2275	} /* FALLTROUGH */
switches	0:5c4d7b2438d3	2276	#endif /* MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED */
switches	0:5c4d7b2438d3	2277
switches	0:5c4d7b2438d3	2278	#if defined(MBEDTLS_KEY_EXCHANGE_PSK_ENABLED) \|\| \
switches	0:5c4d7b2438d3	2279	defined(MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED)
switches	0:5c4d7b2438d3	2280	if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_PSK \|\|
switches	0:5c4d7b2438d3	2281	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_RSA_PSK )
switches	0:5c4d7b2438d3	2282	; /* nothing more to do */
switches	0:5c4d7b2438d3	2283	else
switches	0:5c4d7b2438d3	2284	#endif /* MBEDTLS_KEY_EXCHANGE_PSK_ENABLED \|\|
switches	0:5c4d7b2438d3	2285	MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED */
switches	0:5c4d7b2438d3	2286	#if defined(MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED) \|\| \
switches	0:5c4d7b2438d3	2287	defined(MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED)
switches	0:5c4d7b2438d3	2288	if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_DHE_RSA \|\|
switches	0:5c4d7b2438d3	2289	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_DHE_PSK )
switches	0:5c4d7b2438d3	2290	{
switches	0:5c4d7b2438d3	2291	if( ssl_parse_server_dh_params( ssl, &p, end ) != 0 )
switches	0:5c4d7b2438d3	2292	{
switches	0:5c4d7b2438d3	2293	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server key exchange message" ) );
switches	0:5c4d7b2438d3	2294	return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
switches	0:5c4d7b2438d3	2295	}
switches	0:5c4d7b2438d3	2296	}
switches	0:5c4d7b2438d3	2297	else
switches	0:5c4d7b2438d3	2298	#endif /* MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED \|\|
switches	0:5c4d7b2438d3	2299	MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED */
switches	0:5c4d7b2438d3	2300	#if defined(MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED) \|\| \
switches	0:5c4d7b2438d3	2301	defined(MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED) \|\| \
switches	0:5c4d7b2438d3	2302	defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED)
switches	0:5c4d7b2438d3	2303	if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_RSA \|\|
switches	0:5c4d7b2438d3	2304	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_PSK \|\|
switches	0:5c4d7b2438d3	2305	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA )
switches	0:5c4d7b2438d3	2306	{
switches	0:5c4d7b2438d3	2307	if( ssl_parse_server_ecdh_params( ssl, &p, end ) != 0 )
switches	0:5c4d7b2438d3	2308	{
switches	0:5c4d7b2438d3	2309	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server key exchange message" ) );
switches	0:5c4d7b2438d3	2310	return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
switches	0:5c4d7b2438d3	2311	}
switches	0:5c4d7b2438d3	2312	}
switches	0:5c4d7b2438d3	2313	else
switches	0:5c4d7b2438d3	2314	#endif /* MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED \|\|
switches	0:5c4d7b2438d3	2315	MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED \|\|
switches	0:5c4d7b2438d3	2316	MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED */
switches	0:5c4d7b2438d3	2317	#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
switches	0:5c4d7b2438d3	2318	if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECJPAKE )
switches	0:5c4d7b2438d3	2319	{
switches	0:5c4d7b2438d3	2320	ret = mbedtls_ecjpake_read_round_two( &ssl->handshake->ecjpake_ctx,
switches	0:5c4d7b2438d3	2321	p, end - p );
switches	0:5c4d7b2438d3	2322	if( ret != 0 )
switches	0:5c4d7b2438d3	2323	{
switches	0:5c4d7b2438d3	2324	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ecjpake_read_round_two", ret );
switches	0:5c4d7b2438d3	2325	return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
switches	0:5c4d7b2438d3	2326	}
switches	0:5c4d7b2438d3	2327	}
switches	0:5c4d7b2438d3	2328	else
switches	0:5c4d7b2438d3	2329	#endif /* MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED */
switches	0:5c4d7b2438d3	2330	{
switches	0:5c4d7b2438d3	2331	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
switches	0:5c4d7b2438d3	2332	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
switches	0:5c4d7b2438d3	2333	}
switches	0:5c4d7b2438d3	2334
switches	0:5c4d7b2438d3	2335	#if defined(MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED) \|\| \
switches	0:5c4d7b2438d3	2336	defined(MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED) \|\| \
switches	0:5c4d7b2438d3	2337	defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED)
switches	0:5c4d7b2438d3	2338	if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_DHE_RSA \|\|
switches	0:5c4d7b2438d3	2339	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_RSA \|\|
switches	0:5c4d7b2438d3	2340	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA )
switches	0:5c4d7b2438d3	2341	{
switches	0:5c4d7b2438d3	2342	size_t sig_len, hashlen;
switches	0:5c4d7b2438d3	2343	unsigned char hash[64];
switches	0:5c4d7b2438d3	2344	mbedtls_md_type_t md_alg = MBEDTLS_MD_NONE;
switches	0:5c4d7b2438d3	2345	mbedtls_pk_type_t pk_alg = MBEDTLS_PK_NONE;
switches	0:5c4d7b2438d3	2346	unsigned char *params = ssl->in_msg + mbedtls_ssl_hs_hdr_len( ssl );
switches	0:5c4d7b2438d3	2347	size_t params_len = p - params;
switches	0:5c4d7b2438d3	2348
switches	0:5c4d7b2438d3	2349	/*
switches	0:5c4d7b2438d3	2350	* Handle the digitally-signed structure
switches	0:5c4d7b2438d3	2351	*/
switches	0:5c4d7b2438d3	2352	#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
switches	0:5c4d7b2438d3	2353	if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_3 )
switches	0:5c4d7b2438d3	2354	{
switches	0:5c4d7b2438d3	2355	if( ssl_parse_signature_algorithm( ssl, &p, end,
switches	0:5c4d7b2438d3	2356	&md_alg, &pk_alg ) != 0 )
switches	0:5c4d7b2438d3	2357	{
switches	0:5c4d7b2438d3	2358	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server key exchange message" ) );
switches	0:5c4d7b2438d3	2359	return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
switches	0:5c4d7b2438d3	2360	}
switches	0:5c4d7b2438d3	2361
switches	0:5c4d7b2438d3	2362	if( pk_alg != mbedtls_ssl_get_ciphersuite_sig_pk_alg( ciphersuite_info ) )
switches	0:5c4d7b2438d3	2363	{
switches	0:5c4d7b2438d3	2364	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server key exchange message" ) );
switches	0:5c4d7b2438d3	2365	return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
switches	0:5c4d7b2438d3	2366	}
switches	0:5c4d7b2438d3	2367	}
switches	0:5c4d7b2438d3	2368	else
switches	0:5c4d7b2438d3	2369	#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
switches	0:5c4d7b2438d3	2370	#if defined(MBEDTLS_SSL_PROTO_SSL3) \|\| defined(MBEDTLS_SSL_PROTO_TLS1) \|\| \
switches	0:5c4d7b2438d3	2371	defined(MBEDTLS_SSL_PROTO_TLS1_1)
switches	0:5c4d7b2438d3	2372	if( ssl->minor_ver < MBEDTLS_SSL_MINOR_VERSION_3 )
switches	0:5c4d7b2438d3	2373	{
switches	0:5c4d7b2438d3	2374	pk_alg = mbedtls_ssl_get_ciphersuite_sig_pk_alg( ciphersuite_info );
switches	0:5c4d7b2438d3	2375
switches	0:5c4d7b2438d3	2376	/* Default hash for ECDSA is SHA-1 */
switches	0:5c4d7b2438d3	2377	if( pk_alg == MBEDTLS_PK_ECDSA && md_alg == MBEDTLS_MD_NONE )
switches	0:5c4d7b2438d3	2378	md_alg = MBEDTLS_MD_SHA1;
switches	0:5c4d7b2438d3	2379	}
switches	0:5c4d7b2438d3	2380	else
switches	0:5c4d7b2438d3	2381	#endif
switches	0:5c4d7b2438d3	2382	{
switches	0:5c4d7b2438d3	2383	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
switches	0:5c4d7b2438d3	2384	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
switches	0:5c4d7b2438d3	2385	}
switches	0:5c4d7b2438d3	2386
switches	0:5c4d7b2438d3	2387	/*
switches	0:5c4d7b2438d3	2388	* Read signature
switches	0:5c4d7b2438d3	2389	*/
switches	0:5c4d7b2438d3	2390	sig_len = ( p[0] << 8 ) \| p[1];
switches	0:5c4d7b2438d3	2391	p += 2;
switches	0:5c4d7b2438d3	2392
switches	0:5c4d7b2438d3	2393	if( end != p + sig_len )
switches	0:5c4d7b2438d3	2394	{
switches	0:5c4d7b2438d3	2395	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server key exchange message" ) );
switches	0:5c4d7b2438d3	2396	return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
switches	0:5c4d7b2438d3	2397	}
switches	0:5c4d7b2438d3	2398
switches	0:5c4d7b2438d3	2399	MBEDTLS_SSL_DEBUG_BUF( 3, "signature", p, sig_len );
switches	0:5c4d7b2438d3	2400
switches	0:5c4d7b2438d3	2401	/*
switches	0:5c4d7b2438d3	2402	* Compute the hash that has been signed
switches	0:5c4d7b2438d3	2403	*/
switches	0:5c4d7b2438d3	2404	#if defined(MBEDTLS_SSL_PROTO_SSL3) \|\| defined(MBEDTLS_SSL_PROTO_TLS1) \|\| \
switches	0:5c4d7b2438d3	2405	defined(MBEDTLS_SSL_PROTO_TLS1_1)
switches	0:5c4d7b2438d3	2406	if( md_alg == MBEDTLS_MD_NONE )
switches	0:5c4d7b2438d3	2407	{
switches	0:5c4d7b2438d3	2408	mbedtls_md5_context mbedtls_md5;
switches	0:5c4d7b2438d3	2409	mbedtls_sha1_context mbedtls_sha1;
switches	0:5c4d7b2438d3	2410
switches	0:5c4d7b2438d3	2411	mbedtls_md5_init( &mbedtls_md5 );
switches	0:5c4d7b2438d3	2412	mbedtls_sha1_init( &mbedtls_sha1 );
switches	0:5c4d7b2438d3	2413
switches	0:5c4d7b2438d3	2414	hashlen = 36;
switches	0:5c4d7b2438d3	2415
switches	0:5c4d7b2438d3	2416	/*
switches	0:5c4d7b2438d3	2417	* digitally-signed struct {
switches	0:5c4d7b2438d3	2418	* opaque md5_hash[16];
switches	0:5c4d7b2438d3	2419	* opaque sha_hash[20];
switches	0:5c4d7b2438d3	2420	* };
switches	0:5c4d7b2438d3	2421	*
switches	0:5c4d7b2438d3	2422	* md5_hash
switches	0:5c4d7b2438d3	2423	* MD5(ClientHello.random + ServerHello.random
switches	0:5c4d7b2438d3	2424	* + ServerParams);
switches	0:5c4d7b2438d3	2425	* sha_hash
switches	0:5c4d7b2438d3	2426	* SHA(ClientHello.random + ServerHello.random
switches	0:5c4d7b2438d3	2427	* + ServerParams);
switches	0:5c4d7b2438d3	2428	*/
switches	0:5c4d7b2438d3	2429	mbedtls_md5_starts( &mbedtls_md5 );
switches	0:5c4d7b2438d3	2430	mbedtls_md5_update( &mbedtls_md5, ssl->handshake->randbytes, 64 );
switches	0:5c4d7b2438d3	2431	mbedtls_md5_update( &mbedtls_md5, params, params_len );
switches	0:5c4d7b2438d3	2432	mbedtls_md5_finish( &mbedtls_md5, hash );
switches	0:5c4d7b2438d3	2433
switches	0:5c4d7b2438d3	2434	mbedtls_sha1_starts( &mbedtls_sha1 );
switches	0:5c4d7b2438d3	2435	mbedtls_sha1_update( &mbedtls_sha1, ssl->handshake->randbytes, 64 );
switches	0:5c4d7b2438d3	2436	mbedtls_sha1_update( &mbedtls_sha1, params, params_len );
switches	0:5c4d7b2438d3	2437	mbedtls_sha1_finish( &mbedtls_sha1, hash + 16 );
switches	0:5c4d7b2438d3	2438
switches	0:5c4d7b2438d3	2439	mbedtls_md5_free( &mbedtls_md5 );
switches	0:5c4d7b2438d3	2440	mbedtls_sha1_free( &mbedtls_sha1 );
switches	0:5c4d7b2438d3	2441	}
switches	0:5c4d7b2438d3	2442	else
switches	0:5c4d7b2438d3	2443	#endif /* MBEDTLS_SSL_PROTO_SSL3 \|\| MBEDTLS_SSL_PROTO_TLS1 \|\| \
switches	0:5c4d7b2438d3	2444	MBEDTLS_SSL_PROTO_TLS1_1 */
switches	0:5c4d7b2438d3	2445	#if defined(MBEDTLS_SSL_PROTO_TLS1) \|\| defined(MBEDTLS_SSL_PROTO_TLS1_1) \|\| \
switches	0:5c4d7b2438d3	2446	defined(MBEDTLS_SSL_PROTO_TLS1_2)
switches	0:5c4d7b2438d3	2447	if( md_alg != MBEDTLS_MD_NONE )
switches	0:5c4d7b2438d3	2448	{
switches	0:5c4d7b2438d3	2449	mbedtls_md_context_t ctx;
switches	0:5c4d7b2438d3	2450
switches	0:5c4d7b2438d3	2451	mbedtls_md_init( &ctx );
switches	0:5c4d7b2438d3	2452
switches	0:5c4d7b2438d3	2453	/* Info from md_alg will be used instead */
switches	0:5c4d7b2438d3	2454	hashlen = 0;
switches	0:5c4d7b2438d3	2455
switches	0:5c4d7b2438d3	2456	/*
switches	0:5c4d7b2438d3	2457	* digitally-signed struct {
switches	0:5c4d7b2438d3	2458	* opaque client_random[32];
switches	0:5c4d7b2438d3	2459	* opaque server_random[32];
switches	0:5c4d7b2438d3	2460	* ServerDHParams params;
switches	0:5c4d7b2438d3	2461	* };
switches	0:5c4d7b2438d3	2462	*/
switches	0:5c4d7b2438d3	2463	if( ( ret = mbedtls_md_setup( &ctx,
switches	0:5c4d7b2438d3	2464	mbedtls_md_info_from_type( md_alg ), 0 ) ) != 0 )
switches	0:5c4d7b2438d3	2465	{
switches	0:5c4d7b2438d3	2466	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_md_setup", ret );
switches	0:5c4d7b2438d3	2467	return( ret );
switches	0:5c4d7b2438d3	2468	}
switches	0:5c4d7b2438d3	2469
switches	0:5c4d7b2438d3	2470	mbedtls_md_starts( &ctx );
switches	0:5c4d7b2438d3	2471	mbedtls_md_update( &ctx, ssl->handshake->randbytes, 64 );
switches	0:5c4d7b2438d3	2472	mbedtls_md_update( &ctx, params, params_len );
switches	0:5c4d7b2438d3	2473	mbedtls_md_finish( &ctx, hash );
switches	0:5c4d7b2438d3	2474	mbedtls_md_free( &ctx );
switches	0:5c4d7b2438d3	2475	}
switches	0:5c4d7b2438d3	2476	else
switches	0:5c4d7b2438d3	2477	#endif /* MBEDTLS_SSL_PROTO_TLS1 \|\| MBEDTLS_SSL_PROTO_TLS1_1 \|\| \
switches	0:5c4d7b2438d3	2478	MBEDTLS_SSL_PROTO_TLS1_2 */
switches	0:5c4d7b2438d3	2479	{
switches	0:5c4d7b2438d3	2480	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
switches	0:5c4d7b2438d3	2481	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
switches	0:5c4d7b2438d3	2482	}
switches	0:5c4d7b2438d3	2483
switches	0:5c4d7b2438d3	2484	MBEDTLS_SSL_DEBUG_BUF( 3, "parameters hash", hash, hashlen != 0 ? hashlen :
switches	0:5c4d7b2438d3	2485	(unsigned int) ( mbedtls_md_get_size( mbedtls_md_info_from_type( md_alg ) ) ) );
switches	0:5c4d7b2438d3	2486
switches	0:5c4d7b2438d3	2487	if( ssl->session_negotiate->peer_cert == NULL )
switches	0:5c4d7b2438d3	2488	{
switches	0:5c4d7b2438d3	2489	MBEDTLS_SSL_DEBUG_MSG( 2, ( "certificate required" ) );
switches	0:5c4d7b2438d3	2490	return( MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE );
switches	0:5c4d7b2438d3	2491	}
switches	0:5c4d7b2438d3	2492
switches	0:5c4d7b2438d3	2493	/*
switches	0:5c4d7b2438d3	2494	* Verify signature
switches	0:5c4d7b2438d3	2495	*/
switches	0:5c4d7b2438d3	2496	if( ! mbedtls_pk_can_do( &ssl->session_negotiate->peer_cert->pk, pk_alg ) )
switches	0:5c4d7b2438d3	2497	{
switches	0:5c4d7b2438d3	2498	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server key exchange message" ) );
switches	0:5c4d7b2438d3	2499	return( MBEDTLS_ERR_SSL_PK_TYPE_MISMATCH );
switches	0:5c4d7b2438d3	2500	}
switches	0:5c4d7b2438d3	2501
switches	0:5c4d7b2438d3	2502	if( ( ret = mbedtls_pk_verify( &ssl->session_negotiate->peer_cert->pk,
switches	0:5c4d7b2438d3	2503	md_alg, hash, hashlen, p, sig_len ) ) != 0 )
switches	0:5c4d7b2438d3	2504	{
switches	0:5c4d7b2438d3	2505	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_pk_verify", ret );
switches	0:5c4d7b2438d3	2506	return( ret );
switches	0:5c4d7b2438d3	2507	}
switches	0:5c4d7b2438d3	2508	}
switches	0:5c4d7b2438d3	2509	#endif /* MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED \|\|
switches	0:5c4d7b2438d3	2510	MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED \|\|
switches	0:5c4d7b2438d3	2511	MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED */
switches	0:5c4d7b2438d3	2512
switches	0:5c4d7b2438d3	2513	exit:
switches	0:5c4d7b2438d3	2514	ssl->state++;
switches	0:5c4d7b2438d3	2515
switches	0:5c4d7b2438d3	2516	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= parse server key exchange" ) );
switches	0:5c4d7b2438d3	2517
switches	0:5c4d7b2438d3	2518	return( 0 );
switches	0:5c4d7b2438d3	2519	}
switches	0:5c4d7b2438d3	2520
switches	0:5c4d7b2438d3	2521	#if !defined(MBEDTLS_KEY_EXCHANGE_RSA_ENABLED) && \
switches	0:5c4d7b2438d3	2522	!defined(MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED) && \
switches	0:5c4d7b2438d3	2523	!defined(MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED) && \
switches	0:5c4d7b2438d3	2524	!defined(MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED) && \
switches	0:5c4d7b2438d3	2525	!defined(MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED)&& \
switches	0:5c4d7b2438d3	2526	!defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED)
switches	0:5c4d7b2438d3	2527	static int ssl_parse_certificate_request( mbedtls_ssl_context *ssl )
switches	0:5c4d7b2438d3	2528	{
switches	0:5c4d7b2438d3	2529	const mbedtls_ssl_ciphersuite_t *ciphersuite_info = ssl->transform_negotiate->ciphersuite_info;
switches	0:5c4d7b2438d3	2530
switches	0:5c4d7b2438d3	2531	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> parse certificate request" ) );
switches	0:5c4d7b2438d3	2532
switches	0:5c4d7b2438d3	2533	if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_PSK \|\|
switches	0:5c4d7b2438d3	2534	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_RSA_PSK \|\|
switches	0:5c4d7b2438d3	2535	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_DHE_PSK \|\|
switches	0:5c4d7b2438d3	2536	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_PSK \|\|
switches	0:5c4d7b2438d3	2537	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECJPAKE )
switches	0:5c4d7b2438d3	2538	{
switches	0:5c4d7b2438d3	2539	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip parse certificate request" ) );
switches	0:5c4d7b2438d3	2540	ssl->state++;
switches	0:5c4d7b2438d3	2541	return( 0 );
switches	0:5c4d7b2438d3	2542	}
switches	0:5c4d7b2438d3	2543
switches	0:5c4d7b2438d3	2544	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
switches	0:5c4d7b2438d3	2545	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
switches	0:5c4d7b2438d3	2546	}
switches	0:5c4d7b2438d3	2547	#else
switches	0:5c4d7b2438d3	2548	static int ssl_parse_certificate_request( mbedtls_ssl_context *ssl )
switches	0:5c4d7b2438d3	2549	{
switches	0:5c4d7b2438d3	2550	int ret;
switches	0:5c4d7b2438d3	2551	unsigned char *buf;
switches	0:5c4d7b2438d3	2552	size_t n = 0;
switches	0:5c4d7b2438d3	2553	size_t cert_type_len = 0, dn_len = 0;
switches	0:5c4d7b2438d3	2554	const mbedtls_ssl_ciphersuite_t *ciphersuite_info = ssl->transform_negotiate->ciphersuite_info;
switches	0:5c4d7b2438d3	2555
switches	0:5c4d7b2438d3	2556	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> parse certificate request" ) );
switches	0:5c4d7b2438d3	2557
switches	0:5c4d7b2438d3	2558	if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_PSK \|\|
switches	0:5c4d7b2438d3	2559	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_RSA_PSK \|\|
switches	0:5c4d7b2438d3	2560	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_DHE_PSK \|\|
switches	0:5c4d7b2438d3	2561	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_PSK \|\|
switches	0:5c4d7b2438d3	2562	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECJPAKE )
switches	0:5c4d7b2438d3	2563	{
switches	0:5c4d7b2438d3	2564	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip parse certificate request" ) );
switches	0:5c4d7b2438d3	2565	ssl->state++;
switches	0:5c4d7b2438d3	2566	return( 0 );
switches	0:5c4d7b2438d3	2567	}
switches	0:5c4d7b2438d3	2568
switches	0:5c4d7b2438d3	2569	if( ssl->record_read == 0 )
switches	0:5c4d7b2438d3	2570	{
switches	0:5c4d7b2438d3	2571	if( ( ret = mbedtls_ssl_read_record( ssl ) ) != 0 )
switches	0:5c4d7b2438d3	2572	{
switches	0:5c4d7b2438d3	2573	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_read_record", ret );
switches	0:5c4d7b2438d3	2574	return( ret );
switches	0:5c4d7b2438d3	2575	}
switches	0:5c4d7b2438d3	2576
switches	0:5c4d7b2438d3	2577	if( ssl->in_msgtype != MBEDTLS_SSL_MSG_HANDSHAKE )
switches	0:5c4d7b2438d3	2578	{
switches	0:5c4d7b2438d3	2579	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate request message" ) );
switches	0:5c4d7b2438d3	2580	return( MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE );
switches	0:5c4d7b2438d3	2581	}
switches	0:5c4d7b2438d3	2582
switches	0:5c4d7b2438d3	2583	ssl->record_read = 1;
switches	0:5c4d7b2438d3	2584	}
switches	0:5c4d7b2438d3	2585
switches	0:5c4d7b2438d3	2586	ssl->client_auth = 0;
switches	0:5c4d7b2438d3	2587	ssl->state++;
switches	0:5c4d7b2438d3	2588
switches	0:5c4d7b2438d3	2589	if( ssl->in_msg[0] == MBEDTLS_SSL_HS_CERTIFICATE_REQUEST )
switches	0:5c4d7b2438d3	2590	ssl->client_auth++;
switches	0:5c4d7b2438d3	2591
switches	0:5c4d7b2438d3	2592	MBEDTLS_SSL_DEBUG_MSG( 3, ( "got %s certificate request",
switches	0:5c4d7b2438d3	2593	ssl->client_auth ? "a" : "no" ) );
switches	0:5c4d7b2438d3	2594
switches	0:5c4d7b2438d3	2595	if( ssl->client_auth == 0 )
switches	0:5c4d7b2438d3	2596	goto exit;
switches	0:5c4d7b2438d3	2597
switches	0:5c4d7b2438d3	2598	ssl->record_read = 0;
switches	0:5c4d7b2438d3	2599
switches	0:5c4d7b2438d3	2600	/*
switches	0:5c4d7b2438d3	2601	* struct {
switches	0:5c4d7b2438d3	2602	* ClientCertificateType certificate_types<1..2^8-1>;
switches	0:5c4d7b2438d3	2603	* SignatureAndHashAlgorithm
switches	0:5c4d7b2438d3	2604	* supported_signature_algorithms<2^16-1>; -- TLS 1.2 only
switches	0:5c4d7b2438d3	2605	* DistinguishedName certificate_authorities<0..2^16-1>;
switches	0:5c4d7b2438d3	2606	* } CertificateRequest;
switches	0:5c4d7b2438d3	2607	*
switches	0:5c4d7b2438d3	2608	* Since we only support a single certificate on clients, let's just
switches	0:5c4d7b2438d3	2609	* ignore all the information that's supposed to help us pick a
switches	0:5c4d7b2438d3	2610	* certificate.
switches	0:5c4d7b2438d3	2611	*
switches	0:5c4d7b2438d3	2612	* We could check that our certificate matches the request, and bail out
switches	0:5c4d7b2438d3	2613	* if it doesn't, but it's simpler to just send the certificate anyway,
switches	0:5c4d7b2438d3	2614	* and give the server the opportunity to decide if it should terminate
switches	0:5c4d7b2438d3	2615	* the connection when it doesn't like our certificate.
switches	0:5c4d7b2438d3	2616	*
switches	0:5c4d7b2438d3	2617	* Same goes for the hash in TLS 1.2's signature_algorithms: at this
switches	0:5c4d7b2438d3	2618	* point we only have one hash available (see comments in
switches	0:5c4d7b2438d3	2619	* write_certificate_verify), so let's just use what we have.
switches	0:5c4d7b2438d3	2620	*
switches	0:5c4d7b2438d3	2621	* However, we still minimally parse the message to check it is at least
switches	0:5c4d7b2438d3	2622	* superficially sane.
switches	0:5c4d7b2438d3	2623	*/
switches	0:5c4d7b2438d3	2624	buf = ssl->in_msg;
switches	0:5c4d7b2438d3	2625
switches	0:5c4d7b2438d3	2626	/* certificate_types */
switches	0:5c4d7b2438d3	2627	cert_type_len = buf[mbedtls_ssl_hs_hdr_len( ssl )];
switches	0:5c4d7b2438d3	2628	n = cert_type_len;
switches	0:5c4d7b2438d3	2629
switches	0:5c4d7b2438d3	2630	if( ssl->in_hslen < mbedtls_ssl_hs_hdr_len( ssl ) + 2 + n )
switches	0:5c4d7b2438d3	2631	{
switches	0:5c4d7b2438d3	2632	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate request message" ) );
switches	0:5c4d7b2438d3	2633	return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE_REQUEST );
switches	0:5c4d7b2438d3	2634	}
switches	0:5c4d7b2438d3	2635
switches	0:5c4d7b2438d3	2636	/* supported_signature_algorithms */
switches	0:5c4d7b2438d3	2637	#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
switches	0:5c4d7b2438d3	2638	if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_3 )
switches	0:5c4d7b2438d3	2639	{
switches	0:5c4d7b2438d3	2640	size_t sig_alg_len = ( ( buf[mbedtls_ssl_hs_hdr_len( ssl ) + 1 + n] << 8 )
switches	0:5c4d7b2438d3	2641	\| ( buf[mbedtls_ssl_hs_hdr_len( ssl ) + 2 + n] ) );
switches	0:5c4d7b2438d3	2642	#if defined(MBEDTLS_DEBUG_C)
switches	0:5c4d7b2438d3	2643	unsigned char* sig_alg = buf + mbedtls_ssl_hs_hdr_len( ssl ) + 3 + n;
switches	0:5c4d7b2438d3	2644	size_t i;
switches	0:5c4d7b2438d3	2645
switches	0:5c4d7b2438d3	2646	for( i = 0; i < sig_alg_len; i += 2 )
switches	0:5c4d7b2438d3	2647	{
switches	0:5c4d7b2438d3	2648	MBEDTLS_SSL_DEBUG_MSG( 3, ( "Supported Signature Algorithm found: %d,%d", sig_alg[i], sig_alg[i + 1] ) );
switches	0:5c4d7b2438d3	2649	}
switches	0:5c4d7b2438d3	2650	#endif
switches	0:5c4d7b2438d3	2651
switches	0:5c4d7b2438d3	2652	n += 2 + sig_alg_len;
switches	0:5c4d7b2438d3	2653
switches	0:5c4d7b2438d3	2654	if( ssl->in_hslen < mbedtls_ssl_hs_hdr_len( ssl ) + 2 + n )
switches	0:5c4d7b2438d3	2655	{
switches	0:5c4d7b2438d3	2656	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate request message" ) );
switches	0:5c4d7b2438d3	2657	return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE_REQUEST );
switches	0:5c4d7b2438d3	2658	}
switches	0:5c4d7b2438d3	2659	}
switches	0:5c4d7b2438d3	2660	#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
switches	0:5c4d7b2438d3	2661
switches	0:5c4d7b2438d3	2662	/* certificate_authorities */
switches	0:5c4d7b2438d3	2663	dn_len = ( ( buf[mbedtls_ssl_hs_hdr_len( ssl ) + 1 + n] << 8 )
switches	0:5c4d7b2438d3	2664	\| ( buf[mbedtls_ssl_hs_hdr_len( ssl ) + 2 + n] ) );
switches	0:5c4d7b2438d3	2665
switches	0:5c4d7b2438d3	2666	n += dn_len;
switches	0:5c4d7b2438d3	2667	if( ssl->in_hslen != mbedtls_ssl_hs_hdr_len( ssl ) + 3 + n )
switches	0:5c4d7b2438d3	2668	{
switches	0:5c4d7b2438d3	2669	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate request message" ) );
switches	0:5c4d7b2438d3	2670	return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE_REQUEST );
switches	0:5c4d7b2438d3	2671	}
switches	0:5c4d7b2438d3	2672
switches	0:5c4d7b2438d3	2673	exit:
switches	0:5c4d7b2438d3	2674	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= parse certificate request" ) );
switches	0:5c4d7b2438d3	2675
switches	0:5c4d7b2438d3	2676	return( 0 );
switches	0:5c4d7b2438d3	2677	}
switches	0:5c4d7b2438d3	2678	#endif /* !MBEDTLS_KEY_EXCHANGE_RSA_ENABLED &&
switches	0:5c4d7b2438d3	2679	!MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED &&
switches	0:5c4d7b2438d3	2680	!MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED &&
switches	0:5c4d7b2438d3	2681	!MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED &&
switches	0:5c4d7b2438d3	2682	!MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED &&
switches	0:5c4d7b2438d3	2683	!MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED */
switches	0:5c4d7b2438d3	2684
switches	0:5c4d7b2438d3	2685	static int ssl_parse_server_hello_done( mbedtls_ssl_context *ssl )
switches	0:5c4d7b2438d3	2686	{
switches	0:5c4d7b2438d3	2687	int ret;
switches	0:5c4d7b2438d3	2688
switches	0:5c4d7b2438d3	2689	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> parse server hello done" ) );
switches	0:5c4d7b2438d3	2690
switches	0:5c4d7b2438d3	2691	if( ssl->record_read == 0 )
switches	0:5c4d7b2438d3	2692	{
switches	0:5c4d7b2438d3	2693	if( ( ret = mbedtls_ssl_read_record( ssl ) ) != 0 )
switches	0:5c4d7b2438d3	2694	{
switches	0:5c4d7b2438d3	2695	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_read_record", ret );
switches	0:5c4d7b2438d3	2696	return( ret );
switches	0:5c4d7b2438d3	2697	}
switches	0:5c4d7b2438d3	2698
switches	0:5c4d7b2438d3	2699	if( ssl->in_msgtype != MBEDTLS_SSL_MSG_HANDSHAKE )
switches	0:5c4d7b2438d3	2700	{
switches	0:5c4d7b2438d3	2701	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server hello done message" ) );
switches	0:5c4d7b2438d3	2702	return( MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE );
switches	0:5c4d7b2438d3	2703	}
switches	0:5c4d7b2438d3	2704	}
switches	0:5c4d7b2438d3	2705	ssl->record_read = 0;
switches	0:5c4d7b2438d3	2706
switches	0:5c4d7b2438d3	2707	if( ssl->in_hslen != mbedtls_ssl_hs_hdr_len( ssl ) \|\|
switches	0:5c4d7b2438d3	2708	ssl->in_msg[0] != MBEDTLS_SSL_HS_SERVER_HELLO_DONE )
switches	0:5c4d7b2438d3	2709	{
switches	0:5c4d7b2438d3	2710	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server hello done message" ) );
switches	0:5c4d7b2438d3	2711	return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO_DONE );
switches	0:5c4d7b2438d3	2712	}
switches	0:5c4d7b2438d3	2713
switches	0:5c4d7b2438d3	2714	ssl->state++;
switches	0:5c4d7b2438d3	2715
switches	0:5c4d7b2438d3	2716	#if defined(MBEDTLS_SSL_PROTO_DTLS)
switches	0:5c4d7b2438d3	2717	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
switches	0:5c4d7b2438d3	2718	mbedtls_ssl_recv_flight_completed( ssl );
switches	0:5c4d7b2438d3	2719	#endif
switches	0:5c4d7b2438d3	2720
switches	0:5c4d7b2438d3	2721	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= parse server hello done" ) );
switches	0:5c4d7b2438d3	2722
switches	0:5c4d7b2438d3	2723	return( 0 );
switches	0:5c4d7b2438d3	2724	}
switches	0:5c4d7b2438d3	2725
switches	0:5c4d7b2438d3	2726	static int ssl_write_client_key_exchange( mbedtls_ssl_context *ssl )
switches	0:5c4d7b2438d3	2727	{
switches	0:5c4d7b2438d3	2728	int ret;
switches	0:5c4d7b2438d3	2729	size_t i, n;
switches	0:5c4d7b2438d3	2730	const mbedtls_ssl_ciphersuite_t *ciphersuite_info = ssl->transform_negotiate->ciphersuite_info;
switches	0:5c4d7b2438d3	2731
switches	0:5c4d7b2438d3	2732	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write client key exchange" ) );
switches	0:5c4d7b2438d3	2733
switches	0:5c4d7b2438d3	2734	#if defined(MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED)
switches	0:5c4d7b2438d3	2735	if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_DHE_RSA )
switches	0:5c4d7b2438d3	2736	{
switches	0:5c4d7b2438d3	2737	/*
switches	0:5c4d7b2438d3	2738	* DHM key exchange -- send G^X mod P
switches	0:5c4d7b2438d3	2739	*/
switches	0:5c4d7b2438d3	2740	n = ssl->handshake->dhm_ctx.len;
switches	0:5c4d7b2438d3	2741
switches	0:5c4d7b2438d3	2742	ssl->out_msg[4] = (unsigned char)( n >> 8 );
switches	0:5c4d7b2438d3	2743	ssl->out_msg[5] = (unsigned char)( n );
switches	0:5c4d7b2438d3	2744	i = 6;
switches	0:5c4d7b2438d3	2745
switches	0:5c4d7b2438d3	2746	ret = mbedtls_dhm_make_public( &ssl->handshake->dhm_ctx,
switches	0:5c4d7b2438d3	2747	(int) mbedtls_mpi_size( &ssl->handshake->dhm_ctx.P ),
switches	0:5c4d7b2438d3	2748	&ssl->out_msg[i], n,
switches	0:5c4d7b2438d3	2749	ssl->conf->f_rng, ssl->conf->p_rng );
switches	0:5c4d7b2438d3	2750	if( ret != 0 )
switches	0:5c4d7b2438d3	2751	{
switches	0:5c4d7b2438d3	2752	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_dhm_make_public", ret );
switches	0:5c4d7b2438d3	2753	return( ret );
switches	0:5c4d7b2438d3	2754	}
switches	0:5c4d7b2438d3	2755
switches	0:5c4d7b2438d3	2756	MBEDTLS_SSL_DEBUG_MPI( 3, "DHM: X ", &ssl->handshake->dhm_ctx.X );
switches	0:5c4d7b2438d3	2757	MBEDTLS_SSL_DEBUG_MPI( 3, "DHM: GX", &ssl->handshake->dhm_ctx.GX );
switches	0:5c4d7b2438d3	2758
switches	0:5c4d7b2438d3	2759	if( ( ret = mbedtls_dhm_calc_secret( &ssl->handshake->dhm_ctx,
switches	0:5c4d7b2438d3	2760	ssl->handshake->premaster,
switches	0:5c4d7b2438d3	2761	MBEDTLS_PREMASTER_SIZE,
switches	0:5c4d7b2438d3	2762	&ssl->handshake->pmslen,
switches	0:5c4d7b2438d3	2763	ssl->conf->f_rng, ssl->conf->p_rng ) ) != 0 )
switches	0:5c4d7b2438d3	2764	{
switches	0:5c4d7b2438d3	2765	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_dhm_calc_secret", ret );
switches	0:5c4d7b2438d3	2766	return( ret );
switches	0:5c4d7b2438d3	2767	}
switches	0:5c4d7b2438d3	2768
switches	0:5c4d7b2438d3	2769	MBEDTLS_SSL_DEBUG_MPI( 3, "DHM: K ", &ssl->handshake->dhm_ctx.K );
switches	0:5c4d7b2438d3	2770	}
switches	0:5c4d7b2438d3	2771	else
switches	0:5c4d7b2438d3	2772	#endif /* MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED */
switches	0:5c4d7b2438d3	2773	#if defined(MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED) \|\| \
switches	0:5c4d7b2438d3	2774	defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED) \|\| \
switches	0:5c4d7b2438d3	2775	defined(MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED) \|\| \
switches	0:5c4d7b2438d3	2776	defined(MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED)
switches	0:5c4d7b2438d3	2777	if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_RSA \|\|
switches	0:5c4d7b2438d3	2778	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA \|\|
switches	0:5c4d7b2438d3	2779	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDH_RSA \|\|
switches	0:5c4d7b2438d3	2780	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA )
switches	0:5c4d7b2438d3	2781	{
switches	0:5c4d7b2438d3	2782	/*
switches	0:5c4d7b2438d3	2783	* ECDH key exchange -- send client public value
switches	0:5c4d7b2438d3	2784	*/
switches	0:5c4d7b2438d3	2785	i = 4;
switches	0:5c4d7b2438d3	2786
switches	0:5c4d7b2438d3	2787	ret = mbedtls_ecdh_make_public( &ssl->handshake->ecdh_ctx,
switches	0:5c4d7b2438d3	2788	&n,
switches	0:5c4d7b2438d3	2789	&ssl->out_msg[i], 1000,
switches	0:5c4d7b2438d3	2790	ssl->conf->f_rng, ssl->conf->p_rng );
switches	0:5c4d7b2438d3	2791	if( ret != 0 )
switches	0:5c4d7b2438d3	2792	{
switches	0:5c4d7b2438d3	2793	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ecdh_make_public", ret );
switches	0:5c4d7b2438d3	2794	return( ret );
switches	0:5c4d7b2438d3	2795	}
switches	0:5c4d7b2438d3	2796
switches	0:5c4d7b2438d3	2797	MBEDTLS_SSL_DEBUG_ECP( 3, "ECDH: Q", &ssl->handshake->ecdh_ctx.Q );
switches	0:5c4d7b2438d3	2798
switches	0:5c4d7b2438d3	2799	if( ( ret = mbedtls_ecdh_calc_secret( &ssl->handshake->ecdh_ctx,
switches	0:5c4d7b2438d3	2800	&ssl->handshake->pmslen,
switches	0:5c4d7b2438d3	2801	ssl->handshake->premaster,
switches	0:5c4d7b2438d3	2802	MBEDTLS_MPI_MAX_SIZE,
switches	0:5c4d7b2438d3	2803	ssl->conf->f_rng, ssl->conf->p_rng ) ) != 0 )
switches	0:5c4d7b2438d3	2804	{
switches	0:5c4d7b2438d3	2805	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ecdh_calc_secret", ret );
switches	0:5c4d7b2438d3	2806	return( ret );
switches	0:5c4d7b2438d3	2807	}
switches	0:5c4d7b2438d3	2808
switches	0:5c4d7b2438d3	2809	MBEDTLS_SSL_DEBUG_MPI( 3, "ECDH: z", &ssl->handshake->ecdh_ctx.z );
switches	0:5c4d7b2438d3	2810	}
switches	0:5c4d7b2438d3	2811	else
switches	0:5c4d7b2438d3	2812	#endif /* MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED \|\|
switches	0:5c4d7b2438d3	2813	MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED \|\|
switches	0:5c4d7b2438d3	2814	MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED \|\|
switches	0:5c4d7b2438d3	2815	MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED */
switches	0:5c4d7b2438d3	2816	#if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
switches	0:5c4d7b2438d3	2817	if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_PSK \|\|
switches	0:5c4d7b2438d3	2818	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_RSA_PSK \|\|
switches	0:5c4d7b2438d3	2819	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_DHE_PSK \|\|
switches	0:5c4d7b2438d3	2820	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_PSK )
switches	0:5c4d7b2438d3	2821	{
switches	0:5c4d7b2438d3	2822	/*
switches	0:5c4d7b2438d3	2823	* opaque psk_identity<0..2^16-1>;
switches	0:5c4d7b2438d3	2824	*/
switches	0:5c4d7b2438d3	2825	if( ssl->conf->psk == NULL \|\| ssl->conf->psk_identity == NULL )
switches	0:5c4d7b2438d3	2826	{
switches	0:5c4d7b2438d3	2827	MBEDTLS_SSL_DEBUG_MSG( 1, ( "got no private key for PSK" ) );
switches	0:5c4d7b2438d3	2828	return( MBEDTLS_ERR_SSL_PRIVATE_KEY_REQUIRED );
switches	0:5c4d7b2438d3	2829	}
switches	0:5c4d7b2438d3	2830
switches	0:5c4d7b2438d3	2831	i = 4;
switches	0:5c4d7b2438d3	2832	n = ssl->conf->psk_identity_len;
switches	0:5c4d7b2438d3	2833
switches	0:5c4d7b2438d3	2834	if( i + 2 + n > MBEDTLS_SSL_MAX_CONTENT_LEN )
switches	0:5c4d7b2438d3	2835	{
switches	0:5c4d7b2438d3	2836	MBEDTLS_SSL_DEBUG_MSG( 1, ( "psk identity too long or "
switches	0:5c4d7b2438d3	2837	"SSL buffer too short" ) );
switches	0:5c4d7b2438d3	2838	return( MBEDTLS_ERR_SSL_BUFFER_TOO_SMALL );
switches	0:5c4d7b2438d3	2839	}
switches	0:5c4d7b2438d3	2840
switches	0:5c4d7b2438d3	2841	ssl->out_msg[i++] = (unsigned char)( n >> 8 );
switches	0:5c4d7b2438d3	2842	ssl->out_msg[i++] = (unsigned char)( n );
switches	0:5c4d7b2438d3	2843
switches	0:5c4d7b2438d3	2844	memcpy( ssl->out_msg + i, ssl->conf->psk_identity, ssl->conf->psk_identity_len );
switches	0:5c4d7b2438d3	2845	i += ssl->conf->psk_identity_len;
switches	0:5c4d7b2438d3	2846
switches	0:5c4d7b2438d3	2847	#if defined(MBEDTLS_KEY_EXCHANGE_PSK_ENABLED)
switches	0:5c4d7b2438d3	2848	if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_PSK )
switches	0:5c4d7b2438d3	2849	{
switches	0:5c4d7b2438d3	2850	n = 0;
switches	0:5c4d7b2438d3	2851	}
switches	0:5c4d7b2438d3	2852	else
switches	0:5c4d7b2438d3	2853	#endif
switches	0:5c4d7b2438d3	2854	#if defined(MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED)
switches	0:5c4d7b2438d3	2855	if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_RSA_PSK )
switches	0:5c4d7b2438d3	2856	{
switches	0:5c4d7b2438d3	2857	if( ( ret = ssl_write_encrypted_pms( ssl, i, &n, 2 ) ) != 0 )
switches	0:5c4d7b2438d3	2858	return( ret );
switches	0:5c4d7b2438d3	2859	}
switches	0:5c4d7b2438d3	2860	else
switches	0:5c4d7b2438d3	2861	#endif
switches	0:5c4d7b2438d3	2862	#if defined(MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED)
switches	0:5c4d7b2438d3	2863	if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_DHE_PSK )
switches	0:5c4d7b2438d3	2864	{
switches	0:5c4d7b2438d3	2865	/*
switches	0:5c4d7b2438d3	2866	* ClientDiffieHellmanPublic public (DHM send G^X mod P)
switches	0:5c4d7b2438d3	2867	*/
switches	0:5c4d7b2438d3	2868	n = ssl->handshake->dhm_ctx.len;
switches	0:5c4d7b2438d3	2869
switches	0:5c4d7b2438d3	2870	if( i + 2 + n > MBEDTLS_SSL_MAX_CONTENT_LEN )
switches	0:5c4d7b2438d3	2871	{
switches	0:5c4d7b2438d3	2872	MBEDTLS_SSL_DEBUG_MSG( 1, ( "psk identity or DHM size too long"
switches	0:5c4d7b2438d3	2873	" or SSL buffer too short" ) );
switches	0:5c4d7b2438d3	2874	return( MBEDTLS_ERR_SSL_BUFFER_TOO_SMALL );
switches	0:5c4d7b2438d3	2875	}
switches	0:5c4d7b2438d3	2876
switches	0:5c4d7b2438d3	2877	ssl->out_msg[i++] = (unsigned char)( n >> 8 );
switches	0:5c4d7b2438d3	2878	ssl->out_msg[i++] = (unsigned char)( n );
switches	0:5c4d7b2438d3	2879
switches	0:5c4d7b2438d3	2880	ret = mbedtls_dhm_make_public( &ssl->handshake->dhm_ctx,
switches	0:5c4d7b2438d3	2881	(int) mbedtls_mpi_size( &ssl->handshake->dhm_ctx.P ),
switches	0:5c4d7b2438d3	2882	&ssl->out_msg[i], n,
switches	0:5c4d7b2438d3	2883	ssl->conf->f_rng, ssl->conf->p_rng );
switches	0:5c4d7b2438d3	2884	if( ret != 0 )
switches	0:5c4d7b2438d3	2885	{
switches	0:5c4d7b2438d3	2886	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_dhm_make_public", ret );
switches	0:5c4d7b2438d3	2887	return( ret );
switches	0:5c4d7b2438d3	2888	}
switches	0:5c4d7b2438d3	2889	}
switches	0:5c4d7b2438d3	2890	else
switches	0:5c4d7b2438d3	2891	#endif /* MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED */
switches	0:5c4d7b2438d3	2892	#if defined(MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED)
switches	0:5c4d7b2438d3	2893	if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_PSK )
switches	0:5c4d7b2438d3	2894	{
switches	0:5c4d7b2438d3	2895	/*
switches	0:5c4d7b2438d3	2896	* ClientECDiffieHellmanPublic public;
switches	0:5c4d7b2438d3	2897	*/
switches	0:5c4d7b2438d3	2898	ret = mbedtls_ecdh_make_public( &ssl->handshake->ecdh_ctx, &n,
switches	0:5c4d7b2438d3	2899	&ssl->out_msg[i], MBEDTLS_SSL_MAX_CONTENT_LEN - i,
switches	0:5c4d7b2438d3	2900	ssl->conf->f_rng, ssl->conf->p_rng );
switches	0:5c4d7b2438d3	2901	if( ret != 0 )
switches	0:5c4d7b2438d3	2902	{
switches	0:5c4d7b2438d3	2903	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ecdh_make_public", ret );
switches	0:5c4d7b2438d3	2904	return( ret );
switches	0:5c4d7b2438d3	2905	}
switches	0:5c4d7b2438d3	2906
switches	0:5c4d7b2438d3	2907	MBEDTLS_SSL_DEBUG_ECP( 3, "ECDH: Q", &ssl->handshake->ecdh_ctx.Q );
switches	0:5c4d7b2438d3	2908	}
switches	0:5c4d7b2438d3	2909	else
switches	0:5c4d7b2438d3	2910	#endif /* MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED */
switches	0:5c4d7b2438d3	2911	{
switches	0:5c4d7b2438d3	2912	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
switches	0:5c4d7b2438d3	2913	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
switches	0:5c4d7b2438d3	2914	}
switches	0:5c4d7b2438d3	2915
switches	0:5c4d7b2438d3	2916	if( ( ret = mbedtls_ssl_psk_derive_premaster( ssl,
switches	0:5c4d7b2438d3	2917	ciphersuite_info->key_exchange ) ) != 0 )
switches	0:5c4d7b2438d3	2918	{
switches	0:5c4d7b2438d3	2919	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_psk_derive_premaster", ret );
switches	0:5c4d7b2438d3	2920	return( ret );
switches	0:5c4d7b2438d3	2921	}
switches	0:5c4d7b2438d3	2922	}
switches	0:5c4d7b2438d3	2923	else
switches	0:5c4d7b2438d3	2924	#endif /* MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED */
switches	0:5c4d7b2438d3	2925	#if defined(MBEDTLS_KEY_EXCHANGE_RSA_ENABLED)
switches	0:5c4d7b2438d3	2926	if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_RSA )
switches	0:5c4d7b2438d3	2927	{
switches	0:5c4d7b2438d3	2928	i = 4;
switches	0:5c4d7b2438d3	2929	if( ( ret = ssl_write_encrypted_pms( ssl, i, &n, 0 ) ) != 0 )
switches	0:5c4d7b2438d3	2930	return( ret );
switches	0:5c4d7b2438d3	2931	}
switches	0:5c4d7b2438d3	2932	else
switches	0:5c4d7b2438d3	2933	#endif /* MBEDTLS_KEY_EXCHANGE_RSA_ENABLED */
switches	0:5c4d7b2438d3	2934	#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
switches	0:5c4d7b2438d3	2935	if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECJPAKE )
switches	0:5c4d7b2438d3	2936	{
switches	0:5c4d7b2438d3	2937	i = 4;
switches	0:5c4d7b2438d3	2938
switches	0:5c4d7b2438d3	2939	ret = mbedtls_ecjpake_write_round_two( &ssl->handshake->ecjpake_ctx,
switches	0:5c4d7b2438d3	2940	ssl->out_msg + i, MBEDTLS_SSL_MAX_CONTENT_LEN - i, &n,
switches	0:5c4d7b2438d3	2941	ssl->conf->f_rng, ssl->conf->p_rng );
switches	0:5c4d7b2438d3	2942	if( ret != 0 )
switches	0:5c4d7b2438d3	2943	{
switches	0:5c4d7b2438d3	2944	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ecjpake_write_round_two", ret );
switches	0:5c4d7b2438d3	2945	return( ret );
switches	0:5c4d7b2438d3	2946	}
switches	0:5c4d7b2438d3	2947
switches	0:5c4d7b2438d3	2948	ret = mbedtls_ecjpake_derive_secret( &ssl->handshake->ecjpake_ctx,
switches	0:5c4d7b2438d3	2949	ssl->handshake->premaster, 32, &ssl->handshake->pmslen,
switches	0:5c4d7b2438d3	2950	ssl->conf->f_rng, ssl->conf->p_rng );
switches	0:5c4d7b2438d3	2951	if( ret != 0 )
switches	0:5c4d7b2438d3	2952	{
switches	0:5c4d7b2438d3	2953	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ecjpake_derive_secret", ret );
switches	0:5c4d7b2438d3	2954	return( ret );
switches	0:5c4d7b2438d3	2955	}
switches	0:5c4d7b2438d3	2956	}
switches	0:5c4d7b2438d3	2957	else
switches	0:5c4d7b2438d3	2958	#endif /* MBEDTLS_KEY_EXCHANGE_RSA_ENABLED */
switches	0:5c4d7b2438d3	2959	{
switches	0:5c4d7b2438d3	2960	((void) ciphersuite_info);
switches	0:5c4d7b2438d3	2961	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
switches	0:5c4d7b2438d3	2962	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
switches	0:5c4d7b2438d3	2963	}
switches	0:5c4d7b2438d3	2964
switches	0:5c4d7b2438d3	2965	ssl->out_msglen = i + n;
switches	0:5c4d7b2438d3	2966	ssl->out_msgtype = MBEDTLS_SSL_MSG_HANDSHAKE;
switches	0:5c4d7b2438d3	2967	ssl->out_msg[0] = MBEDTLS_SSL_HS_CLIENT_KEY_EXCHANGE;
switches	0:5c4d7b2438d3	2968
switches	0:5c4d7b2438d3	2969	ssl->state++;
switches	0:5c4d7b2438d3	2970
switches	0:5c4d7b2438d3	2971	if( ( ret = mbedtls_ssl_write_record( ssl ) ) != 0 )
switches	0:5c4d7b2438d3	2972	{
switches	0:5c4d7b2438d3	2973	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_write_record", ret );
switches	0:5c4d7b2438d3	2974	return( ret );
switches	0:5c4d7b2438d3	2975	}
switches	0:5c4d7b2438d3	2976
switches	0:5c4d7b2438d3	2977	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= write client key exchange" ) );
switches	0:5c4d7b2438d3	2978
switches	0:5c4d7b2438d3	2979	return( 0 );
switches	0:5c4d7b2438d3	2980	}
switches	0:5c4d7b2438d3	2981
switches	0:5c4d7b2438d3	2982	#if !defined(MBEDTLS_KEY_EXCHANGE_RSA_ENABLED) && \
switches	0:5c4d7b2438d3	2983	!defined(MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED) && \
switches	0:5c4d7b2438d3	2984	!defined(MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED) && \
switches	0:5c4d7b2438d3	2985	!defined(MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED) && \
switches	0:5c4d7b2438d3	2986	!defined(MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED)&& \
switches	0:5c4d7b2438d3	2987	!defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED)
switches	0:5c4d7b2438d3	2988	static int ssl_write_certificate_verify( mbedtls_ssl_context *ssl )
switches	0:5c4d7b2438d3	2989	{
switches	0:5c4d7b2438d3	2990	const mbedtls_ssl_ciphersuite_t *ciphersuite_info = ssl->transform_negotiate->ciphersuite_info;
switches	0:5c4d7b2438d3	2991	int ret;
switches	0:5c4d7b2438d3	2992
switches	0:5c4d7b2438d3	2993	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write certificate verify" ) );
switches	0:5c4d7b2438d3	2994
switches	0:5c4d7b2438d3	2995	if( ( ret = mbedtls_ssl_derive_keys( ssl ) ) != 0 )
switches	0:5c4d7b2438d3	2996	{
switches	0:5c4d7b2438d3	2997	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_derive_keys", ret );
switches	0:5c4d7b2438d3	2998	return( ret );
switches	0:5c4d7b2438d3	2999	}
switches	0:5c4d7b2438d3	3000
switches	0:5c4d7b2438d3	3001	if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_PSK \|\|
switches	0:5c4d7b2438d3	3002	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_RSA_PSK \|\|
switches	0:5c4d7b2438d3	3003	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_PSK \|\|
switches	0:5c4d7b2438d3	3004	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_DHE_PSK \|\|
switches	0:5c4d7b2438d3	3005	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECJPAKE )
switches	0:5c4d7b2438d3	3006	{
switches	0:5c4d7b2438d3	3007	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip write certificate verify" ) );
switches	0:5c4d7b2438d3	3008	ssl->state++;
switches	0:5c4d7b2438d3	3009	return( 0 );
switches	0:5c4d7b2438d3	3010	}
switches	0:5c4d7b2438d3	3011
switches	0:5c4d7b2438d3	3012	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
switches	0:5c4d7b2438d3	3013	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
switches	0:5c4d7b2438d3	3014	}
switches	0:5c4d7b2438d3	3015	#else
switches	0:5c4d7b2438d3	3016	static int ssl_write_certificate_verify( mbedtls_ssl_context *ssl )
switches	0:5c4d7b2438d3	3017	{
switches	0:5c4d7b2438d3	3018	int ret = MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE;
switches	0:5c4d7b2438d3	3019	const mbedtls_ssl_ciphersuite_t *ciphersuite_info = ssl->transform_negotiate->ciphersuite_info;
switches	0:5c4d7b2438d3	3020	size_t n = 0, offset = 0;
switches	0:5c4d7b2438d3	3021	unsigned char hash[48];
switches	0:5c4d7b2438d3	3022	unsigned char *hash_start = hash;
switches	0:5c4d7b2438d3	3023	mbedtls_md_type_t md_alg = MBEDTLS_MD_NONE;
switches	0:5c4d7b2438d3	3024	unsigned int hashlen;
switches	0:5c4d7b2438d3	3025
switches	0:5c4d7b2438d3	3026	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write certificate verify" ) );
switches	0:5c4d7b2438d3	3027
switches	0:5c4d7b2438d3	3028	if( ( ret = mbedtls_ssl_derive_keys( ssl ) ) != 0 )
switches	0:5c4d7b2438d3	3029	{
switches	0:5c4d7b2438d3	3030	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_derive_keys", ret );
switches	0:5c4d7b2438d3	3031	return( ret );
switches	0:5c4d7b2438d3	3032	}
switches	0:5c4d7b2438d3	3033
switches	0:5c4d7b2438d3	3034	if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_PSK \|\|
switches	0:5c4d7b2438d3	3035	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_RSA_PSK \|\|
switches	0:5c4d7b2438d3	3036	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_PSK \|\|
switches	0:5c4d7b2438d3	3037	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_DHE_PSK \|\|
switches	0:5c4d7b2438d3	3038	ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECJPAKE )
switches	0:5c4d7b2438d3	3039	{
switches	0:5c4d7b2438d3	3040	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip write certificate verify" ) );
switches	0:5c4d7b2438d3	3041	ssl->state++;
switches	0:5c4d7b2438d3	3042	return( 0 );
switches	0:5c4d7b2438d3	3043	}
switches	0:5c4d7b2438d3	3044
switches	0:5c4d7b2438d3	3045	if( ssl->client_auth == 0 \|\| mbedtls_ssl_own_cert( ssl ) == NULL )
switches	0:5c4d7b2438d3	3046	{
switches	0:5c4d7b2438d3	3047	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip write certificate verify" ) );
switches	0:5c4d7b2438d3	3048	ssl->state++;
switches	0:5c4d7b2438d3	3049	return( 0 );
switches	0:5c4d7b2438d3	3050	}
switches	0:5c4d7b2438d3	3051
switches	0:5c4d7b2438d3	3052	if( mbedtls_ssl_own_key( ssl ) == NULL )
switches	0:5c4d7b2438d3	3053	{
switches	0:5c4d7b2438d3	3054	MBEDTLS_SSL_DEBUG_MSG( 1, ( "got no private key for certificate" ) );
switches	0:5c4d7b2438d3	3055	return( MBEDTLS_ERR_SSL_PRIVATE_KEY_REQUIRED );
switches	0:5c4d7b2438d3	3056	}
switches	0:5c4d7b2438d3	3057
switches	0:5c4d7b2438d3	3058	/*
switches	0:5c4d7b2438d3	3059	* Make an RSA signature of the handshake digests
switches	0:5c4d7b2438d3	3060	*/
switches	0:5c4d7b2438d3	3061	ssl->handshake->calc_verify( ssl, hash );
switches	0:5c4d7b2438d3	3062
switches	0:5c4d7b2438d3	3063	#if defined(MBEDTLS_SSL_PROTO_SSL3) \|\| defined(MBEDTLS_SSL_PROTO_TLS1) \|\| \
switches	0:5c4d7b2438d3	3064	defined(MBEDTLS_SSL_PROTO_TLS1_1)
switches	0:5c4d7b2438d3	3065	if( ssl->minor_ver != MBEDTLS_SSL_MINOR_VERSION_3 )
switches	0:5c4d7b2438d3	3066	{
switches	0:5c4d7b2438d3	3067	/*
switches	0:5c4d7b2438d3	3068	* digitally-signed struct {
switches	0:5c4d7b2438d3	3069	* opaque md5_hash[16];
switches	0:5c4d7b2438d3	3070	* opaque sha_hash[20];
switches	0:5c4d7b2438d3	3071	* };
switches	0:5c4d7b2438d3	3072	*
switches	0:5c4d7b2438d3	3073	* md5_hash
switches	0:5c4d7b2438d3	3074	* MD5(handshake_messages);
switches	0:5c4d7b2438d3	3075	*
switches	0:5c4d7b2438d3	3076	* sha_hash
switches	0:5c4d7b2438d3	3077	* SHA(handshake_messages);
switches	0:5c4d7b2438d3	3078	*/
switches	0:5c4d7b2438d3	3079	hashlen = 36;
switches	0:5c4d7b2438d3	3080	md_alg = MBEDTLS_MD_NONE;
switches	0:5c4d7b2438d3	3081
switches	0:5c4d7b2438d3	3082	/*
switches	0:5c4d7b2438d3	3083	* For ECDSA, default hash is SHA-1 only
switches	0:5c4d7b2438d3	3084	*/
switches	0:5c4d7b2438d3	3085	if( mbedtls_pk_can_do( mbedtls_ssl_own_key( ssl ), MBEDTLS_PK_ECDSA ) )
switches	0:5c4d7b2438d3	3086	{
switches	0:5c4d7b2438d3	3087	hash_start += 16;
switches	0:5c4d7b2438d3	3088	hashlen -= 16;
switches	0:5c4d7b2438d3	3089	md_alg = MBEDTLS_MD_SHA1;
switches	0:5c4d7b2438d3	3090	}
switches	0:5c4d7b2438d3	3091	}
switches	0:5c4d7b2438d3	3092	else
switches	0:5c4d7b2438d3	3093	#endif /* MBEDTLS_SSL_PROTO_SSL3 \|\| MBEDTLS_SSL_PROTO_TLS1 \|\| \
switches	0:5c4d7b2438d3	3094	MBEDTLS_SSL_PROTO_TLS1_1 */
switches	0:5c4d7b2438d3	3095	#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
switches	0:5c4d7b2438d3	3096	if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_3 )
switches	0:5c4d7b2438d3	3097	{
switches	0:5c4d7b2438d3	3098	/*
switches	0:5c4d7b2438d3	3099	* digitally-signed struct {
switches	0:5c4d7b2438d3	3100	* opaque handshake_messages[handshake_messages_length];
switches	0:5c4d7b2438d3	3101	* };
switches	0:5c4d7b2438d3	3102	*
switches	0:5c4d7b2438d3	3103	* Taking shortcut here. We assume that the server always allows the
switches	0:5c4d7b2438d3	3104	* PRF Hash function and has sent it in the allowed signature
switches	0:5c4d7b2438d3	3105	* algorithms list received in the Certificate Request message.
switches	0:5c4d7b2438d3	3106	*
switches	0:5c4d7b2438d3	3107	* Until we encounter a server that does not, we will take this
switches	0:5c4d7b2438d3	3108	* shortcut.
switches	0:5c4d7b2438d3	3109	*
switches	0:5c4d7b2438d3	3110	* Reason: Otherwise we should have running hashes for SHA512 and SHA224
switches	0:5c4d7b2438d3	3111	* in order to satisfy 'weird' needs from the server side.
switches	0:5c4d7b2438d3	3112	*/
switches	0:5c4d7b2438d3	3113	if( ssl->transform_negotiate->ciphersuite_info->mac ==
switches	0:5c4d7b2438d3	3114	MBEDTLS_MD_SHA384 )
switches	0:5c4d7b2438d3	3115	{
switches	0:5c4d7b2438d3	3116	md_alg = MBEDTLS_MD_SHA384;
switches	0:5c4d7b2438d3	3117	ssl->out_msg[4] = MBEDTLS_SSL_HASH_SHA384;
switches	0:5c4d7b2438d3	3118	}
switches	0:5c4d7b2438d3	3119	else
switches	0:5c4d7b2438d3	3120	{
switches	0:5c4d7b2438d3	3121	md_alg = MBEDTLS_MD_SHA256;
switches	0:5c4d7b2438d3	3122	ssl->out_msg[4] = MBEDTLS_SSL_HASH_SHA256;
switches	0:5c4d7b2438d3	3123	}
switches	0:5c4d7b2438d3	3124	ssl->out_msg[5] = mbedtls_ssl_sig_from_pk( mbedtls_ssl_own_key( ssl ) );
switches	0:5c4d7b2438d3	3125
switches	0:5c4d7b2438d3	3126	/* Info from md_alg will be used instead */
switches	0:5c4d7b2438d3	3127	hashlen = 0;
switches	0:5c4d7b2438d3	3128	offset = 2;
switches	0:5c4d7b2438d3	3129	}
switches	0:5c4d7b2438d3	3130	else
switches	0:5c4d7b2438d3	3131	#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
switches	0:5c4d7b2438d3	3132	{
switches	0:5c4d7b2438d3	3133	MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
switches	0:5c4d7b2438d3	3134	return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
switches	0:5c4d7b2438d3	3135	}
switches	0:5c4d7b2438d3	3136
switches	0:5c4d7b2438d3	3137	if( ( ret = mbedtls_pk_sign( mbedtls_ssl_own_key( ssl ), md_alg, hash_start, hashlen,
switches	0:5c4d7b2438d3	3138	ssl->out_msg + 6 + offset, &n,
switches	0:5c4d7b2438d3	3139	ssl->conf->f_rng, ssl->conf->p_rng ) ) != 0 )
switches	0:5c4d7b2438d3	3140	{
switches	0:5c4d7b2438d3	3141	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_pk_sign", ret );
switches	0:5c4d7b2438d3	3142	return( ret );
switches	0:5c4d7b2438d3	3143	}
switches	0:5c4d7b2438d3	3144
switches	0:5c4d7b2438d3	3145	ssl->out_msg[4 + offset] = (unsigned char)( n >> 8 );
switches	0:5c4d7b2438d3	3146	ssl->out_msg[5 + offset] = (unsigned char)( n );
switches	0:5c4d7b2438d3	3147
switches	0:5c4d7b2438d3	3148	ssl->out_msglen = 6 + n + offset;
switches	0:5c4d7b2438d3	3149	ssl->out_msgtype = MBEDTLS_SSL_MSG_HANDSHAKE;
switches	0:5c4d7b2438d3	3150	ssl->out_msg[0] = MBEDTLS_SSL_HS_CERTIFICATE_VERIFY;
switches	0:5c4d7b2438d3	3151
switches	0:5c4d7b2438d3	3152	ssl->state++;
switches	0:5c4d7b2438d3	3153
switches	0:5c4d7b2438d3	3154	if( ( ret = mbedtls_ssl_write_record( ssl ) ) != 0 )
switches	0:5c4d7b2438d3	3155	{
switches	0:5c4d7b2438d3	3156	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_write_record", ret );
switches	0:5c4d7b2438d3	3157	return( ret );
switches	0:5c4d7b2438d3	3158	}
switches	0:5c4d7b2438d3	3159
switches	0:5c4d7b2438d3	3160	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= write certificate verify" ) );
switches	0:5c4d7b2438d3	3161
switches	0:5c4d7b2438d3	3162	return( ret );
switches	0:5c4d7b2438d3	3163	}
switches	0:5c4d7b2438d3	3164	#endif /* !MBEDTLS_KEY_EXCHANGE_RSA_ENABLED &&
switches	0:5c4d7b2438d3	3165	!MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED &&
switches	0:5c4d7b2438d3	3166	!MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED &&
switches	0:5c4d7b2438d3	3167	!MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED &&
switches	0:5c4d7b2438d3	3168	!MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED &&
switches	0:5c4d7b2438d3	3169	!MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED */
switches	0:5c4d7b2438d3	3170
switches	0:5c4d7b2438d3	3171	#if defined(MBEDTLS_SSL_SESSION_TICKETS)
switches	0:5c4d7b2438d3	3172	static int ssl_parse_new_session_ticket( mbedtls_ssl_context *ssl )
switches	0:5c4d7b2438d3	3173	{
switches	0:5c4d7b2438d3	3174	int ret;
switches	0:5c4d7b2438d3	3175	uint32_t lifetime;
switches	0:5c4d7b2438d3	3176	size_t ticket_len;
switches	0:5c4d7b2438d3	3177	unsigned char *ticket;
switches	0:5c4d7b2438d3	3178	const unsigned char *msg;
switches	0:5c4d7b2438d3	3179
switches	0:5c4d7b2438d3	3180	MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> parse new session ticket" ) );
switches	0:5c4d7b2438d3	3181
switches	0:5c4d7b2438d3	3182	if( ( ret = mbedtls_ssl_read_record( ssl ) ) != 0 )
switches	0:5c4d7b2438d3	3183	{
switches	0:5c4d7b2438d3	3184	MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_read_record", ret );
switches	0:5c4d7b2438d3	3185	return( ret );
switches	0:5c4d7b2438d3	3186	}
switches	0:5c4d7b2438d3	3187
switches	0:5c4d7b2438d3	3188	if( ssl->in_msgtype != MBEDTLS_SSL_MSG_HANDSHAKE )
switches	0:5c4d7b2438d3	3189	{
switches	0:5c4d7b2438d3	3190	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad new session ticket message" ) );
switches	0:5c4d7b2438d3	3191	return( MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE );
switches	0:5c4d7b2438d3	3192	}
switches	0:5c4d7b2438d3	3193
switches	0:5c4d7b2438d3	3194	/*
switches	0:5c4d7b2438d3	3195	* struct {
switches	0:5c4d7b2438d3	3196	* uint32 ticket_lifetime_hint;
switches	0:5c4d7b2438d3	3197	* opaque ticket<0..2^16-1>;
switches	0:5c4d7b2438d3	3198	* } NewSessionTicket;
switches	0:5c4d7b2438d3	3199	*
switches	0:5c4d7b2438d3	3200	* 0 . 3 ticket_lifetime_hint
switches	0:5c4d7b2438d3	3201	* 4 . 5 ticket_len (n)
switches	0:5c4d7b2438d3	3202	* 6 . 5+n ticket content
switches	0:5c4d7b2438d3	3203	*/
switches	0:5c4d7b2438d3	3204	if( ssl->in_msg[0] != MBEDTLS_SSL_HS_NEW_SESSION_TICKET \|\|
switches	0:5c4d7b2438d3	3205	ssl->in_hslen < 6 + mbedtls_ssl_hs_hdr_len( ssl ) )
switches	0:5c4d7b2438d3	3206	{
switches	0:5c4d7b2438d3	3207	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad new session ticket message" ) );
switches	0:5c4d7b2438d3	3208	return( MBEDTLS_ERR_SSL_BAD_HS_NEW_SESSION_TICKET );
switches	0:5c4d7b2438d3	3209	}
switches	0:5c4d7b2438d3	3210
switches	0:5c4d7b2438d3	3211	msg = ssl->in_msg + mbedtls_ssl_hs_hdr_len( ssl );
switches	0:5c4d7b2438d3	3212
switches	0:5c4d7b2438d3	3213	lifetime = ( msg[0] << 24 ) \| ( msg[1] << 16 ) \|
switches	0:5c4d7b2438d3	3214	( msg[2] << 8 ) \| ( msg[3] );
switches	0:5c4d7b2438d3	3215
switches	0:5c4d7b2438d3	3216	ticket_len = ( msg[4] << 8 ) \| ( msg[5] );
switches	0:5c4d7b2438d3	3217
switches	0:5c4d7b2438d3	3218	if( ticket_len + 6 + mbedtls_ssl_hs_hdr_len( ssl ) != ssl->in_hslen )
switches	0:5c4d7b2438d3	3219	{
switches	0:5c4d7b2438d3	3220	MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad new session ticket message" ) );
switches	0:5c4d7b2438d3	3221	return( MBEDTLS_ERR_SSL_BAD_HS_NEW_SESSION_TICKET );
switches	0:5c4d7b2438d3	3222	}
switches	0:5c4d7b2438d3	3223
switches	0:5c4d7b2438d3	3224	MBEDTLS_SSL_DEBUG_MSG( 3, ( "ticket length: %d", ticket_len ) );
switches	0:5c4d7b2438d3	3225
switches	0:5c4d7b2438d3	3226	/* We're not waiting for a NewSessionTicket message any more */
switches	0:5c4d7b2438d3	3227	ssl->handshake->new_session_ticket = 0;
switches	0:5c4d7b2438d3	3228	ssl->state = MBEDTLS_SSL_SERVER_CHANGE_CIPHER_SPEC;
switches	0:5c4d7b2438d3	3229
switches	0:5c4d7b2438d3	3230	/*
switches	0:5c4d7b2438d3	3231	* Zero-length ticket means the server changed his mind and doesn't want
switches	0:5c4d7b2438d3	3232	* to send a ticket after all, so just forget it
switches	0:5c4d7b2438d3	3233	*/
switches	0:5c4d7b2438d3	3234	if( ticket_len == 0 )
switches	0:5c4d7b2438d3	3235	return( 0 );
switches	0:5c4d7b2438d3	3236
switches	0:5c4d7b2438d3	3237	mbedtls_zeroize( ssl->session_negotiate->ticket,
switches	0:5c4d7b2438d3	3238	ssl->session_negotiate->ticket_len );
switches	0:5c4d7b2438d3	3239	mbedtls_free( ssl->session_negotiate->ticket );
switches	0:5c4d7b2438d3	3240	ssl->session_negotiate->ticket = NULL;
switches	0:5c4d7b2438d3	3241	ssl->session_negotiate->ticket_len = 0;
switches	0:5c4d7b2438d3	3242
switches	0:5c4d7b2438d3	3243	if( ( ticket = mbedtls_calloc( 1, ticket_len ) ) == NULL )
switches	0:5c4d7b2438d3	3244	{
switches	0:5c4d7b2438d3	3245	MBEDTLS_SSL_DEBUG_MSG( 1, ( "ticket alloc failed" ) );
switches	0:5c4d7b2438d3	3246	return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
switches	0:5c4d7b2438d3	3247	}
switches	0:5c4d7b2438d3	3248
switches	0:5c4d7b2438d3	3249	memcpy( ticket, msg + 6, ticket_len );
switches	0:5c4d7b2438d3	3250
switches	0:5c4d7b2438d3	3251	ssl->session_negotiate->ticket = ticket;
switches	0:5c4d7b2438d3	3252	ssl->session_negotiate->ticket_len = ticket_len;
switches	0:5c4d7b2438d3	3253	ssl->session_negotiate->ticket_lifetime = lifetime;
switches	0:5c4d7b2438d3	3254
switches	0:5c4d7b2438d3	3255	/*
switches	0:5c4d7b2438d3	3256	* RFC 5077 section 3.4:
switches	0:5c4d7b2438d3	3257	* "If the client receives a session ticket from the server, then it
switches	0:5c4d7b2438d3	3258	* discards any Session ID that was sent in the ServerHello."
switches	0:5c4d7b2438d3	3259	*/
switches	0:5c4d7b2438d3	3260	MBEDTLS_SSL_DEBUG_MSG( 3, ( "ticket in use, discarding session id" ) );
switches	0:5c4d7b2438d3	3261	ssl->session_negotiate->id_len = 0;
switches	0:5c4d7b2438d3	3262
switches	0:5c4d7b2438d3	3263	MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= parse new session ticket" ) );
switches	0:5c4d7b2438d3	3264
switches	0:5c4d7b2438d3	3265	return( 0 );
switches	0:5c4d7b2438d3	3266	}
switches	0:5c4d7b2438d3	3267	#endif /* MBEDTLS_SSL_SESSION_TICKETS */
switches	0:5c4d7b2438d3	3268
switches	0:5c4d7b2438d3	3269	/*
switches	0:5c4d7b2438d3	3270	* SSL handshake -- client side -- single step
switches	0:5c4d7b2438d3	3271	*/
switches	0:5c4d7b2438d3	3272	int mbedtls_ssl_handshake_client_step( mbedtls_ssl_context *ssl )
switches	0:5c4d7b2438d3	3273	{
switches	0:5c4d7b2438d3	3274	int ret = 0;
switches	0:5c4d7b2438d3	3275
switches	0:5c4d7b2438d3	3276	if( ssl->state == MBEDTLS_SSL_HANDSHAKE_OVER \|\| ssl->handshake == NULL )
switches	0:5c4d7b2438d3	3277	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
switches	0:5c4d7b2438d3	3278
switches	0:5c4d7b2438d3	3279	MBEDTLS_SSL_DEBUG_MSG( 2, ( "client state: %d", ssl->state ) );
switches	0:5c4d7b2438d3	3280
switches	0:5c4d7b2438d3	3281	if( ( ret = mbedtls_ssl_flush_output( ssl ) ) != 0 )
switches	0:5c4d7b2438d3	3282	return( ret );
switches	0:5c4d7b2438d3	3283
switches	0:5c4d7b2438d3	3284	#if defined(MBEDTLS_SSL_PROTO_DTLS)
switches	0:5c4d7b2438d3	3285	if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM &&
switches	0:5c4d7b2438d3	3286	ssl->handshake->retransmit_state == MBEDTLS_SSL_RETRANS_SENDING )
switches	0:5c4d7b2438d3	3287	{
switches	0:5c4d7b2438d3	3288	if( ( ret = mbedtls_ssl_resend( ssl ) ) != 0 )
switches	0:5c4d7b2438d3	3289	return( ret );
switches	0:5c4d7b2438d3	3290	}
switches	0:5c4d7b2438d3	3291	#endif
switches	0:5c4d7b2438d3	3292
switches	0:5c4d7b2438d3	3293	/* Change state now, so that it is right in mbedtls_ssl_read_record(), used
switches	0:5c4d7b2438d3	3294	* by DTLS for dropping out-of-sequence ChangeCipherSpec records */
switches	0:5c4d7b2438d3	3295	#if defined(MBEDTLS_SSL_SESSION_TICKETS)
switches	0:5c4d7b2438d3	3296	if( ssl->state == MBEDTLS_SSL_SERVER_CHANGE_CIPHER_SPEC &&
switches	0:5c4d7b2438d3	3297	ssl->handshake->new_session_ticket != 0 )
switches	0:5c4d7b2438d3	3298	{
switches	0:5c4d7b2438d3	3299	ssl->state = MBEDTLS_SSL_SERVER_NEW_SESSION_TICKET;
switches	0:5c4d7b2438d3	3300	}
switches	0:5c4d7b2438d3	3301	#endif
switches	0:5c4d7b2438d3	3302
switches	0:5c4d7b2438d3	3303	switch( ssl->state )
switches	0:5c4d7b2438d3	3304	{
switches	0:5c4d7b2438d3	3305	case MBEDTLS_SSL_HELLO_REQUEST:
switches	0:5c4d7b2438d3	3306	ssl->state = MBEDTLS_SSL_CLIENT_HELLO;
switches	0:5c4d7b2438d3	3307	break;
switches	0:5c4d7b2438d3	3308
switches	0:5c4d7b2438d3	3309	/*
switches	0:5c4d7b2438d3	3310	* ==> ClientHello
switches	0:5c4d7b2438d3	3311	*/
switches	0:5c4d7b2438d3	3312	case MBEDTLS_SSL_CLIENT_HELLO:
switches	0:5c4d7b2438d3	3313	ret = ssl_write_client_hello( ssl );
switches	0:5c4d7b2438d3	3314	break;
switches	0:5c4d7b2438d3	3315
switches	0:5c4d7b2438d3	3316	/*
switches	0:5c4d7b2438d3	3317	* <== ServerHello
switches	0:5c4d7b2438d3	3318	* Certificate
switches	0:5c4d7b2438d3	3319	* ( ServerKeyExchange )
switches	0:5c4d7b2438d3	3320	* ( CertificateRequest )
switches	0:5c4d7b2438d3	3321	* ServerHelloDone
switches	0:5c4d7b2438d3	3322	*/
switches	0:5c4d7b2438d3	3323	case MBEDTLS_SSL_SERVER_HELLO:
switches	0:5c4d7b2438d3	3324	ret = ssl_parse_server_hello( ssl );
switches	0:5c4d7b2438d3	3325	break;
switches	0:5c4d7b2438d3	3326
switches	0:5c4d7b2438d3	3327	case MBEDTLS_SSL_SERVER_CERTIFICATE:
switches	0:5c4d7b2438d3	3328	ret = mbedtls_ssl_parse_certificate( ssl );
switches	0:5c4d7b2438d3	3329	break;
switches	0:5c4d7b2438d3	3330
switches	0:5c4d7b2438d3	3331	case MBEDTLS_SSL_SERVER_KEY_EXCHANGE:
switches	0:5c4d7b2438d3	3332	ret = ssl_parse_server_key_exchange( ssl );
switches	0:5c4d7b2438d3	3333	break;
switches	0:5c4d7b2438d3	3334
switches	0:5c4d7b2438d3	3335	case MBEDTLS_SSL_CERTIFICATE_REQUEST:
switches	0:5c4d7b2438d3	3336	ret = ssl_parse_certificate_request( ssl );
switches	0:5c4d7b2438d3	3337	break;
switches	0:5c4d7b2438d3	3338
switches	0:5c4d7b2438d3	3339	case MBEDTLS_SSL_SERVER_HELLO_DONE:
switches	0:5c4d7b2438d3	3340	ret = ssl_parse_server_hello_done( ssl );
switches	0:5c4d7b2438d3	3341	break;
switches	0:5c4d7b2438d3	3342
switches	0:5c4d7b2438d3	3343	/*
switches	0:5c4d7b2438d3	3344	* ==> ( Certificate/Alert )
switches	0:5c4d7b2438d3	3345	* ClientKeyExchange
switches	0:5c4d7b2438d3	3346	* ( CertificateVerify )
switches	0:5c4d7b2438d3	3347	* ChangeCipherSpec
switches	0:5c4d7b2438d3	3348	* Finished
switches	0:5c4d7b2438d3	3349	*/
switches	0:5c4d7b2438d3	3350	case MBEDTLS_SSL_CLIENT_CERTIFICATE:
switches	0:5c4d7b2438d3	3351	ret = mbedtls_ssl_write_certificate( ssl );
switches	0:5c4d7b2438d3	3352	break;
switches	0:5c4d7b2438d3	3353
switches	0:5c4d7b2438d3	3354	case MBEDTLS_SSL_CLIENT_KEY_EXCHANGE:
switches	0:5c4d7b2438d3	3355	ret = ssl_write_client_key_exchange( ssl );
switches	0:5c4d7b2438d3	3356	break;
switches	0:5c4d7b2438d3	3357
switches	0:5c4d7b2438d3	3358	case MBEDTLS_SSL_CERTIFICATE_VERIFY:
switches	0:5c4d7b2438d3	3359	ret = ssl_write_certificate_verify( ssl );
switches	0:5c4d7b2438d3	3360	break;
switches	0:5c4d7b2438d3	3361
switches	0:5c4d7b2438d3	3362	case MBEDTLS_SSL_CLIENT_CHANGE_CIPHER_SPEC:
switches	0:5c4d7b2438d3	3363	ret = mbedtls_ssl_write_change_cipher_spec( ssl );
switches	0:5c4d7b2438d3	3364	break;
switches	0:5c4d7b2438d3	3365
switches	0:5c4d7b2438d3	3366	case MBEDTLS_SSL_CLIENT_FINISHED:
switches	0:5c4d7b2438d3	3367	ret = mbedtls_ssl_write_finished( ssl );
switches	0:5c4d7b2438d3	3368	break;
switches	0:5c4d7b2438d3	3369
switches	0:5c4d7b2438d3	3370	/*
switches	0:5c4d7b2438d3	3371	* <== ( NewSessionTicket )
switches	0:5c4d7b2438d3	3372	* ChangeCipherSpec
switches	0:5c4d7b2438d3	3373	* Finished
switches	0:5c4d7b2438d3	3374	*/
switches	0:5c4d7b2438d3	3375	#if defined(MBEDTLS_SSL_SESSION_TICKETS)
switches	0:5c4d7b2438d3	3376	case MBEDTLS_SSL_SERVER_NEW_SESSION_TICKET:
switches	0:5c4d7b2438d3	3377	ret = ssl_parse_new_session_ticket( ssl );
switches	0:5c4d7b2438d3	3378	break;
switches	0:5c4d7b2438d3	3379	#endif
switches	0:5c4d7b2438d3	3380
switches	0:5c4d7b2438d3	3381	case MBEDTLS_SSL_SERVER_CHANGE_CIPHER_SPEC:
switches	0:5c4d7b2438d3	3382	ret = mbedtls_ssl_parse_change_cipher_spec( ssl );
switches	0:5c4d7b2438d3	3383	break;
switches	0:5c4d7b2438d3	3384
switches	0:5c4d7b2438d3	3385	case MBEDTLS_SSL_SERVER_FINISHED:
switches	0:5c4d7b2438d3	3386	ret = mbedtls_ssl_parse_finished( ssl );
switches	0:5c4d7b2438d3	3387	break;
switches	0:5c4d7b2438d3	3388
switches	0:5c4d7b2438d3	3389	case MBEDTLS_SSL_FLUSH_BUFFERS:
switches	0:5c4d7b2438d3	3390	MBEDTLS_SSL_DEBUG_MSG( 2, ( "handshake: done" ) );
switches	0:5c4d7b2438d3	3391	ssl->state = MBEDTLS_SSL_HANDSHAKE_WRAPUP;
switches	0:5c4d7b2438d3	3392	break;
switches	0:5c4d7b2438d3	3393
switches	0:5c4d7b2438d3	3394	case MBEDTLS_SSL_HANDSHAKE_WRAPUP:
switches	0:5c4d7b2438d3	3395	mbedtls_ssl_handshake_wrapup( ssl );
switches	0:5c4d7b2438d3	3396	break;
switches	0:5c4d7b2438d3	3397
switches	0:5c4d7b2438d3	3398	default:
switches	0:5c4d7b2438d3	3399	MBEDTLS_SSL_DEBUG_MSG( 1, ( "invalid state %d", ssl->state ) );
switches	0:5c4d7b2438d3	3400	return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
switches	0:5c4d7b2438d3	3401	}
switches	0:5c4d7b2438d3	3402
switches	0:5c4d7b2438d3	3403	return( ret );
switches	0:5c4d7b2438d3	3404	}
switches	0:5c4d7b2438d3	3405	#endif /* MBEDTLS_SSL_CLI_C */

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Type:	Library
Created:	11 Nov 2016
Imports:	21
Forks:	0
Commits:	4
Dependents:	1
Dependencies:	0
Followers:	4

This repository is Public (Unlisted).

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Greg Steiert

Jesse Marroquin

features/mbedtls/src/ssl_cli.c@3:1198227e6421, 2016-12-16 (annotated)

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