Jerry Yu | 3cc4c2a | 2021-08-06 16:29:08 +0800 | [diff] [blame] | 1 | /* |
| 2 | * TLS 1.3 client-side functions |
| 3 | * |
| 4 | * Copyright The Mbed TLS Contributors |
| 5 | * SPDX-License-Identifier: Apache-2.0 |
| 6 | * |
| 7 | * Licensed under the Apache License, Version 2.0 (the "License"); you may |
| 8 | * not use this file except in compliance with the License. |
| 9 | * You may obtain a copy of the License at |
| 10 | * |
| 11 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 12 | * |
| 13 | * Unless required by applicable law or agreed to in writing, software |
| 14 | * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| 15 | * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 16 | * See the License for the specific language governing permissions and |
| 17 | * limitations under the License. |
| 18 | * |
| 19 | * This file is part of mbed TLS ( https://tls.mbed.org ) |
| 20 | */ |
| 21 | |
| 22 | #include "common.h" |
| 23 | |
Jerry Yu | cc43c6b | 2022-01-28 10:24:45 +0800 | [diff] [blame] | 24 | #if defined(MBEDTLS_SSL_CLI_C) && defined(MBEDTLS_SSL_PROTO_TLS1_3) |
Jerry Yu | 3cc4c2a | 2021-08-06 16:29:08 +0800 | [diff] [blame] | 25 | |
Jerry Yu | bc20bdd | 2021-08-24 15:59:48 +0800 | [diff] [blame] | 26 | #include <string.h> |
| 27 | |
Jerry Yu | 56fc07f | 2021-09-01 17:48:49 +0800 | [diff] [blame] | 28 | #include "mbedtls/debug.h" |
| 29 | #include "mbedtls/error.h" |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 30 | #include "mbedtls/platform.h" |
Jerry Yu | a13c7e7 | 2021-08-17 10:44:40 +0800 | [diff] [blame] | 31 | |
Jerry Yu | bdc7188 | 2021-09-14 19:30:36 +0800 | [diff] [blame] | 32 | #include "ssl_misc.h" |
| 33 | #include "ecdh_misc.h" |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 34 | #include "ssl_tls13_keys.h" |
Gilles Peskine | 923d5c9 | 2021-12-15 12:56:54 +0100 | [diff] [blame] | 35 | #include "ssl_debug_helpers.h" |
Jerry Yu | bdc7188 | 2021-09-14 19:30:36 +0800 | [diff] [blame] | 36 | |
Jerry Yu | bc20bdd | 2021-08-24 15:59:48 +0800 | [diff] [blame] | 37 | /* Write extensions */ |
| 38 | |
Jerry Yu | 92c6b40 | 2021-08-27 16:59:09 +0800 | [diff] [blame] | 39 | /* |
| 40 | * ssl_tls13_write_supported_versions_ext(): |
| 41 | * |
| 42 | * struct { |
| 43 | * ProtocolVersion versions<2..254>; |
| 44 | * } SupportedVersions; |
| 45 | */ |
Jerry Yu | f443681 | 2021-08-26 22:59:56 +0800 | [diff] [blame] | 46 | static int ssl_tls13_write_supported_versions_ext( mbedtls_ssl_context *ssl, |
Jerry Yu | eecfbf0 | 2021-08-30 18:32:07 +0800 | [diff] [blame] | 47 | unsigned char *buf, |
| 48 | unsigned char *end, |
Xiaofei Bai | d25fab6 | 2021-12-02 06:36:27 +0000 | [diff] [blame] | 49 | size_t *out_len ) |
Jerry Yu | 92c6b40 | 2021-08-27 16:59:09 +0800 | [diff] [blame] | 50 | { |
| 51 | unsigned char *p = buf; |
| 52 | |
Xiaofei Bai | d25fab6 | 2021-12-02 06:36:27 +0000 | [diff] [blame] | 53 | *out_len = 0; |
Jerry Yu | 92c6b40 | 2021-08-27 16:59:09 +0800 | [diff] [blame] | 54 | |
Jerry Yu | 159c5a0 | 2021-08-31 12:51:25 +0800 | [diff] [blame] | 55 | MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello, adding supported versions extension" ) ); |
Jerry Yu | 92c6b40 | 2021-08-27 16:59:09 +0800 | [diff] [blame] | 56 | |
Jerry Yu | 388bd0d | 2021-09-15 18:41:02 +0800 | [diff] [blame] | 57 | /* Check if we have space to write the extension: |
Jerry Yu | b60e3cf | 2021-09-08 16:41:02 +0800 | [diff] [blame] | 58 | * - extension_type (2 bytes) |
| 59 | * - extension_data_length (2 bytes) |
| 60 | * - versions_length (1 byte ) |
| 61 | * - versions (2 bytes) |
Jerry Yu | 159c5a0 | 2021-08-31 12:51:25 +0800 | [diff] [blame] | 62 | */ |
Jerry Yu | 92c6b40 | 2021-08-27 16:59:09 +0800 | [diff] [blame] | 63 | MBEDTLS_SSL_CHK_BUF_PTR( p, end, 7 ); |
| 64 | |
Jerry Yu | 1bc2c1f | 2021-09-01 12:57:29 +0800 | [diff] [blame] | 65 | /* Write extension_type */ |
Jerry Yu | eecfbf0 | 2021-08-30 18:32:07 +0800 | [diff] [blame] | 66 | MBEDTLS_PUT_UINT16_BE( MBEDTLS_TLS_EXT_SUPPORTED_VERSIONS, p, 0 ); |
Jerry Yu | 92c6b40 | 2021-08-27 16:59:09 +0800 | [diff] [blame] | 67 | |
Jerry Yu | 1bc2c1f | 2021-09-01 12:57:29 +0800 | [diff] [blame] | 68 | /* Write extension_data_length */ |
Jerry Yu | b7ab336 | 2021-08-31 16:16:19 +0800 | [diff] [blame] | 69 | MBEDTLS_PUT_UINT16_BE( 3, p, 2 ); |
Jerry Yu | eecfbf0 | 2021-08-30 18:32:07 +0800 | [diff] [blame] | 70 | p += 4; |
Jerry Yu | 92c6b40 | 2021-08-27 16:59:09 +0800 | [diff] [blame] | 71 | |
Jerry Yu | 1bc2c1f | 2021-09-01 12:57:29 +0800 | [diff] [blame] | 72 | /* Length of versions */ |
Jerry Yu | 92c6b40 | 2021-08-27 16:59:09 +0800 | [diff] [blame] | 73 | *p++ = 0x2; |
| 74 | |
Jerry Yu | 0c63af6 | 2021-09-02 12:59:12 +0800 | [diff] [blame] | 75 | /* Write values of supported versions. |
Jerry Yu | 1bc2c1f | 2021-09-01 12:57:29 +0800 | [diff] [blame] | 76 | * |
Jerry Yu | 0c63af6 | 2021-09-02 12:59:12 +0800 | [diff] [blame] | 77 | * They are defined by the configuration. |
Jerry Yu | 1bc2c1f | 2021-09-01 12:57:29 +0800 | [diff] [blame] | 78 | * |
Jerry Yu | 0c63af6 | 2021-09-02 12:59:12 +0800 | [diff] [blame] | 79 | * Currently, only one version is advertised. |
Jerry Yu | 92c6b40 | 2021-08-27 16:59:09 +0800 | [diff] [blame] | 80 | */ |
Jerry Yu | eecfbf0 | 2021-08-30 18:32:07 +0800 | [diff] [blame] | 81 | mbedtls_ssl_write_version( ssl->conf->max_major_ver, |
| 82 | ssl->conf->max_minor_ver, |
| 83 | ssl->conf->transport, p ); |
Jerry Yu | 92c6b40 | 2021-08-27 16:59:09 +0800 | [diff] [blame] | 84 | |
| 85 | MBEDTLS_SSL_DEBUG_MSG( 3, ( "supported version: [%d:%d]", |
Jerry Yu | eecfbf0 | 2021-08-30 18:32:07 +0800 | [diff] [blame] | 86 | ssl->conf->max_major_ver, |
| 87 | ssl->conf->max_minor_ver ) ); |
Jerry Yu | 92c6b40 | 2021-08-27 16:59:09 +0800 | [diff] [blame] | 88 | |
Xiaofei Bai | d25fab6 | 2021-12-02 06:36:27 +0000 | [diff] [blame] | 89 | *out_len = 7; |
Jerry Yu | 92c6b40 | 2021-08-27 16:59:09 +0800 | [diff] [blame] | 90 | |
| 91 | return( 0 ); |
| 92 | } |
Jerry Yu | bc20bdd | 2021-08-24 15:59:48 +0800 | [diff] [blame] | 93 | |
Jerry Yu | c068b66 | 2021-10-11 22:30:19 +0800 | [diff] [blame] | 94 | static int ssl_tls13_parse_supported_versions_ext( mbedtls_ssl_context *ssl, |
| 95 | const unsigned char *buf, |
Jerry Yu | b85277e | 2021-10-13 13:36:05 +0800 | [diff] [blame] | 96 | const unsigned char *end ) |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 97 | { |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 98 | ((void) ssl); |
| 99 | |
Jerry Yu | b85277e | 2021-10-13 13:36:05 +0800 | [diff] [blame] | 100 | MBEDTLS_SSL_CHK_BUF_READ_PTR( buf, end, 2); |
| 101 | if( buf[0] != MBEDTLS_SSL_MAJOR_VERSION_3 || |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 102 | buf[1] != MBEDTLS_SSL_MINOR_VERSION_4 ) |
| 103 | { |
| 104 | MBEDTLS_SSL_DEBUG_MSG( 1, ( "unexpected version" ) ); |
Jerry Yu | 4a17338 | 2021-10-11 21:45:31 +0800 | [diff] [blame] | 105 | |
| 106 | MBEDTLS_SSL_PEND_FATAL_ALERT( MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER, |
| 107 | MBEDTLS_ERR_SSL_ILLEGAL_PARAMETER); |
| 108 | return( MBEDTLS_ERR_SSL_ILLEGAL_PARAMETER ); |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 109 | } |
| 110 | |
| 111 | return( 0 ); |
| 112 | } |
| 113 | |
lhuang04 | 86cacac | 2022-01-21 07:34:27 -0800 | [diff] [blame] | 114 | #if defined(MBEDTLS_SSL_ALPN) |
| 115 | /* |
| 116 | * ssl_tls13_write_alpn_ext( ) structure: |
| 117 | * |
| 118 | * opaque ProtocolName<1..2^8-1>; |
| 119 | * |
| 120 | * struct { |
| 121 | * ProtocolName protocol_name_list<2..2^16-1> |
| 122 | * } ProtocolNameList; |
| 123 | * |
| 124 | */ |
| 125 | static int ssl_tls13_write_alpn_ext( mbedtls_ssl_context *ssl, |
| 126 | unsigned char *buf, |
| 127 | const unsigned char *end, |
| 128 | size_t *olen ) |
| 129 | { |
| 130 | unsigned char *p = buf; |
Ronald Cron | 13d8ea1 | 2022-03-09 10:48:18 +0100 | [diff] [blame^] | 131 | size_t protocol_name_len; |
lhuang04 | 86cacac | 2022-01-21 07:34:27 -0800 | [diff] [blame] | 132 | const char **cur; |
| 133 | |
| 134 | *olen = 0; |
| 135 | |
| 136 | if( ssl->conf->alpn_list == NULL ) |
| 137 | return( 0 ); |
| 138 | |
| 139 | MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello, adding alpn extension" ) ); |
| 140 | |
lhuang04 | 86cacac | 2022-01-21 07:34:27 -0800 | [diff] [blame] | 141 | |
Ronald Cron | 13d8ea1 | 2022-03-09 10:48:18 +0100 | [diff] [blame^] | 142 | /* Check we have enough space for the extension type (2 bytes), the |
| 143 | * extension length (2 bytes) and the protocol_name_list length (2 bytes). |
| 144 | */ |
| 145 | MBEDTLS_SSL_CHK_BUF_PTR( p, end, 6 ); |
lhuang04 | 86cacac | 2022-01-21 07:34:27 -0800 | [diff] [blame] | 146 | MBEDTLS_PUT_UINT16_BE( MBEDTLS_TLS_EXT_ALPN, p, 0 ); |
Ronald Cron | 13d8ea1 | 2022-03-09 10:48:18 +0100 | [diff] [blame^] | 147 | /* Skip writing extension and list length for now */ |
| 148 | p += 6; |
lhuang04 | 86cacac | 2022-01-21 07:34:27 -0800 | [diff] [blame] | 149 | |
| 150 | /* |
| 151 | * opaque ProtocolName<1..2^8-1>; |
| 152 | * |
| 153 | * struct { |
| 154 | * ProtocolName protocol_name_list<2..2^16-1> |
| 155 | * } ProtocolNameList; |
| 156 | */ |
lhuang04 | 86cacac | 2022-01-21 07:34:27 -0800 | [diff] [blame] | 157 | for( cur = ssl->conf->alpn_list; *cur != NULL; cur++ ) |
| 158 | { |
| 159 | /* |
| 160 | * mbedtls_ssl_conf_set_alpn_protocols() checked that the length of |
| 161 | * protocol names is less than 255. |
| 162 | */ |
Ronald Cron | 13d8ea1 | 2022-03-09 10:48:18 +0100 | [diff] [blame^] | 163 | protocol_name_len = strlen( *cur ); |
| 164 | MBEDTLS_SSL_CHK_BUF_PTR( p, end, 1 + protocol_name_len ); |
| 165 | *p++ = (unsigned char)protocol_name_len; |
| 166 | memcpy( p, *cur, protocol_name_len ); |
| 167 | p += protocol_name_len; |
lhuang04 | 86cacac | 2022-01-21 07:34:27 -0800 | [diff] [blame] | 168 | } |
| 169 | |
| 170 | *olen = p - buf; |
| 171 | |
| 172 | /* List length = olen - 2 (ext_type) - 2 (ext_len) - 2 (list_len) */ |
| 173 | MBEDTLS_PUT_UINT16_BE( *olen - 6, buf, 4 ); |
| 174 | |
| 175 | /* Extension length = olen - 2 (ext_type) - 2 (ext_len) */ |
| 176 | MBEDTLS_PUT_UINT16_BE( *olen - 4, buf, 2 ); |
| 177 | |
| 178 | return( 0 ); |
| 179 | } |
| 180 | |
| 181 | static int ssl_tls13_parse_alpn_ext( mbedtls_ssl_context *ssl, |
| 182 | const unsigned char *buf, size_t len ) |
| 183 | { |
| 184 | size_t list_len, name_len; |
| 185 | const unsigned char *p = buf; |
| 186 | const unsigned char *end = buf + len; |
| 187 | |
| 188 | /* If we didn't send it, the server shouldn't send it */ |
| 189 | if( ssl->conf->alpn_list == NULL ) |
| 190 | return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); |
| 191 | |
| 192 | /* |
| 193 | * opaque ProtocolName<1..2^8-1>; |
| 194 | * |
| 195 | * struct { |
| 196 | * ProtocolName protocol_name_list<2..2^16-1> |
| 197 | * } ProtocolNameList; |
| 198 | * |
| 199 | * the "ProtocolNameList" MUST contain exactly one "ProtocolName" |
| 200 | */ |
| 201 | |
| 202 | /* Min length is 2 ( list_len ) + 1 ( name_len ) + 1 ( name ) */ |
| 203 | MBEDTLS_SSL_CHK_BUF_READ_PTR( p, end, 4 ); |
| 204 | |
| 205 | list_len = MBEDTLS_GET_UINT16_BE( p, 0 ); |
| 206 | p += 2; |
| 207 | MBEDTLS_SSL_CHK_BUF_READ_PTR( p, end, list_len ); |
| 208 | |
| 209 | name_len = *p++; |
| 210 | MBEDTLS_SSL_CHK_BUF_READ_PTR( p, end, list_len - 1 ); |
| 211 | |
| 212 | /* Check that the server chosen protocol was in our list and save it */ |
| 213 | for ( const char **alpn = ssl->conf->alpn_list; *alpn != NULL; alpn++ ) |
| 214 | { |
| 215 | if( name_len == strlen( *alpn ) && |
| 216 | memcmp( buf + 3, *alpn, name_len ) == 0 ) |
| 217 | { |
| 218 | ssl->alpn_chosen = *alpn; |
| 219 | return( 0 ); |
| 220 | } |
| 221 | } |
| 222 | |
| 223 | return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); |
| 224 | } |
| 225 | #endif /* MBEDTLS_SSL_ALPN */ |
| 226 | |
Jerry Yu | bc20bdd | 2021-08-24 15:59:48 +0800 | [diff] [blame] | 227 | #if defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED) |
| 228 | |
XiaokangQian | 16acd4b | 2022-01-14 07:35:47 +0000 | [diff] [blame] | 229 | static int ssl_tls13_reset_key_share( mbedtls_ssl_context *ssl ) |
XiaokangQian | 647719a | 2021-12-07 09:16:29 +0000 | [diff] [blame] | 230 | { |
| 231 | uint16_t group_id = ssl->handshake->offered_group_id; |
| 232 | if( group_id == 0 ) |
| 233 | return( MBEDTLS_ERR_SSL_INTERNAL_ERROR ); |
| 234 | |
XiaokangQian | 355e09a | 2022-01-20 11:14:50 +0000 | [diff] [blame] | 235 | #if defined(MBEDTLS_ECDH_C) |
XiaokangQian | 647719a | 2021-12-07 09:16:29 +0000 | [diff] [blame] | 236 | if( mbedtls_ssl_tls13_named_group_is_ecdhe( group_id ) ) |
XiaokangQian | 78b1fa7 | 2022-01-19 06:56:30 +0000 | [diff] [blame] | 237 | { |
| 238 | mbedtls_ecdh_free( &ssl->handshake->ecdh_ctx ); |
| 239 | return( 0 ); |
| 240 | } |
XiaokangQian | 355e09a | 2022-01-20 11:14:50 +0000 | [diff] [blame] | 241 | else |
| 242 | #endif /* MBEDTLS_ECDH_C */ |
| 243 | if( 0 /* other KEMs? */ ) |
XiaokangQian | 647719a | 2021-12-07 09:16:29 +0000 | [diff] [blame] | 244 | { |
| 245 | /* Do something */ |
| 246 | } |
| 247 | |
| 248 | return( MBEDTLS_ERR_SSL_INTERNAL_ERROR ); |
| 249 | } |
| 250 | |
| 251 | /* |
Jerry Yu | 56fc07f | 2021-09-01 17:48:49 +0800 | [diff] [blame] | 252 | * Functions for writing key_share extension. |
| 253 | */ |
| 254 | #if defined(MBEDTLS_ECDH_C) |
Jerry Yu | 7c522d4 | 2021-09-08 17:55:09 +0800 | [diff] [blame] | 255 | static int ssl_tls13_generate_and_write_ecdh_key_exchange( |
Jerry Yu | b60e3cf | 2021-09-08 16:41:02 +0800 | [diff] [blame] | 256 | mbedtls_ssl_context *ssl, |
| 257 | uint16_t named_group, |
| 258 | unsigned char *buf, |
| 259 | unsigned char *end, |
Xiaofei Bai | d25fab6 | 2021-12-02 06:36:27 +0000 | [diff] [blame] | 260 | size_t *out_len ) |
Jerry Yu | 92c6b40 | 2021-08-27 16:59:09 +0800 | [diff] [blame] | 261 | { |
Przemek Stekiel | e894c5c | 2022-03-02 08:45:56 +0100 | [diff] [blame] | 262 | psa_status_t status = PSA_ERROR_GENERIC_ERROR; |
| 263 | int ret = MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE; |
| 264 | psa_key_attributes_t key_attributes; |
| 265 | size_t own_pubkey_len; |
| 266 | mbedtls_ssl_handshake_params *handshake = ssl->handshake; |
| 267 | size_t ecdh_bits = 0; |
Jerry Yu | 56fc07f | 2021-09-01 17:48:49 +0800 | [diff] [blame] | 268 | |
Przemek Stekiel | e894c5c | 2022-03-02 08:45:56 +0100 | [diff] [blame] | 269 | MBEDTLS_SSL_DEBUG_MSG( 1, ( "Perform PSA-based ECDH computation." ) ); |
Jerry Yu | 56fc07f | 2021-09-01 17:48:49 +0800 | [diff] [blame] | 270 | |
Przemek Stekiel | e894c5c | 2022-03-02 08:45:56 +0100 | [diff] [blame] | 271 | /* Convert EC group to PSA key type. */ |
| 272 | if( ( handshake->ecdh_psa_type = |
| 273 | mbedtls_psa_parse_tls_ecc_group( named_group, &ecdh_bits ) ) == 0 ) |
| 274 | return( MBEDTLS_ERR_SSL_HANDSHAKE_FAILURE ); |
Jerry Yu | 56fc07f | 2021-09-01 17:48:49 +0800 | [diff] [blame] | 275 | |
Przemek Stekiel | e894c5c | 2022-03-02 08:45:56 +0100 | [diff] [blame] | 276 | if( ecdh_bits > 0xffff ) |
| 277 | return( MBEDTLS_ERR_SSL_ILLEGAL_PARAMETER ); |
| 278 | ssl->handshake->ecdh_bits = (uint16_t) ecdh_bits; |
Jerry Yu | 56fc07f | 2021-09-01 17:48:49 +0800 | [diff] [blame] | 279 | |
Przemek Stekiel | e894c5c | 2022-03-02 08:45:56 +0100 | [diff] [blame] | 280 | key_attributes = psa_key_attributes_init(); |
| 281 | psa_set_key_usage_flags( &key_attributes, PSA_KEY_USAGE_DERIVE ); |
| 282 | psa_set_key_algorithm( &key_attributes, PSA_ALG_ECDH ); |
| 283 | psa_set_key_type( &key_attributes, handshake->ecdh_psa_type ); |
| 284 | psa_set_key_bits( &key_attributes, handshake->ecdh_bits ); |
Przemyslaw Stekiel | ea859c2 | 2022-02-10 10:19:46 +0100 | [diff] [blame] | 285 | |
Przemek Stekiel | e894c5c | 2022-03-02 08:45:56 +0100 | [diff] [blame] | 286 | /* Generate ECDH private key. */ |
| 287 | status = psa_generate_key( &key_attributes, |
| 288 | &handshake->ecdh_psa_privkey ); |
| 289 | if( status != PSA_SUCCESS ) |
Jerry Yu | 56fc07f | 2021-09-01 17:48:49 +0800 | [diff] [blame] | 290 | { |
Przemek Stekiel | e894c5c | 2022-03-02 08:45:56 +0100 | [diff] [blame] | 291 | ret = psa_ssl_status_to_mbedtls( status ); |
| 292 | MBEDTLS_SSL_DEBUG_RET( 1, "psa_generate_key", ret ); |
Jerry Yu | 56fc07f | 2021-09-01 17:48:49 +0800 | [diff] [blame] | 293 | return( ret ); |
Przemyslaw Stekiel | ea859c2 | 2022-02-10 10:19:46 +0100 | [diff] [blame] | 294 | |
Jerry Yu | 56fc07f | 2021-09-01 17:48:49 +0800 | [diff] [blame] | 295 | } |
| 296 | |
Przemek Stekiel | e894c5c | 2022-03-02 08:45:56 +0100 | [diff] [blame] | 297 | /* Export the public part of the ECDH private key from PSA. */ |
| 298 | status = psa_export_public_key( handshake->ecdh_psa_privkey, |
| 299 | buf, (size_t)( end - buf ), |
| 300 | &own_pubkey_len ); |
| 301 | if( status != PSA_SUCCESS ) |
Jerry Yu | 56fc07f | 2021-09-01 17:48:49 +0800 | [diff] [blame] | 302 | { |
Przemek Stekiel | e894c5c | 2022-03-02 08:45:56 +0100 | [diff] [blame] | 303 | ret = psa_ssl_status_to_mbedtls( status ); |
| 304 | MBEDTLS_SSL_DEBUG_RET( 1, "psa_export_public_key", ret ); |
Jerry Yu | 56fc07f | 2021-09-01 17:48:49 +0800 | [diff] [blame] | 305 | return( ret ); |
Przemyslaw Stekiel | ea859c2 | 2022-02-10 10:19:46 +0100 | [diff] [blame] | 306 | |
Jerry Yu | 56fc07f | 2021-09-01 17:48:49 +0800 | [diff] [blame] | 307 | } |
| 308 | |
Przemek Stekiel | e894c5c | 2022-03-02 08:45:56 +0100 | [diff] [blame] | 309 | if( own_pubkey_len > (size_t)( end - buf ) ) |
| 310 | { |
| 311 | MBEDTLS_SSL_DEBUG_MSG( 1, ( "No space in the buffer for ECDH public key." ) ); |
| 312 | return( MBEDTLS_ERR_SSL_BUFFER_TOO_SMALL ); |
| 313 | } |
Przemyslaw Stekiel | ea859c2 | 2022-02-10 10:19:46 +0100 | [diff] [blame] | 314 | |
Przemek Stekiel | e894c5c | 2022-03-02 08:45:56 +0100 | [diff] [blame] | 315 | *out_len = own_pubkey_len; |
Przemyslaw Stekiel | ea859c2 | 2022-02-10 10:19:46 +0100 | [diff] [blame] | 316 | |
Jerry Yu | 7533635 | 2021-09-01 15:59:36 +0800 | [diff] [blame] | 317 | return( 0 ); |
Jerry Yu | 92c6b40 | 2021-08-27 16:59:09 +0800 | [diff] [blame] | 318 | } |
Jerry Yu | 56fc07f | 2021-09-01 17:48:49 +0800 | [diff] [blame] | 319 | #endif /* MBEDTLS_ECDH_C */ |
| 320 | |
Jerry Yu | b60e3cf | 2021-09-08 16:41:02 +0800 | [diff] [blame] | 321 | static int ssl_tls13_get_default_group_id( mbedtls_ssl_context *ssl, |
| 322 | uint16_t *group_id ) |
Jerry Yu | 56fc07f | 2021-09-01 17:48:49 +0800 | [diff] [blame] | 323 | { |
| 324 | int ret = MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE; |
| 325 | |
Jerry Yu | 56fc07f | 2021-09-01 17:48:49 +0800 | [diff] [blame] | 326 | |
Jerry Yu | 56fc07f | 2021-09-01 17:48:49 +0800 | [diff] [blame] | 327 | #if defined(MBEDTLS_ECDH_C) |
Brett Warren | 14efd33 | 2021-10-06 09:32:11 +0100 | [diff] [blame] | 328 | const uint16_t *group_list = mbedtls_ssl_get_groups( ssl ); |
Jerry Yu | 388bd0d | 2021-09-15 18:41:02 +0800 | [diff] [blame] | 329 | /* Pick first available ECDHE group compatible with TLS 1.3 */ |
Brett Warren | 14efd33 | 2021-10-06 09:32:11 +0100 | [diff] [blame] | 330 | if( group_list == NULL ) |
Jerry Yu | 388bd0d | 2021-09-15 18:41:02 +0800 | [diff] [blame] | 331 | return( MBEDTLS_ERR_SSL_BAD_CONFIG ); |
| 332 | |
Brett Warren | 14efd33 | 2021-10-06 09:32:11 +0100 | [diff] [blame] | 333 | for ( ; *group_list != 0; group_list++ ) |
Jerry Yu | 56fc07f | 2021-09-01 17:48:49 +0800 | [diff] [blame] | 334 | { |
Xiaofei Bai | eef1504 | 2021-11-18 07:29:56 +0000 | [diff] [blame] | 335 | const mbedtls_ecp_curve_info *curve_info; |
| 336 | curve_info = mbedtls_ecp_curve_info_from_tls_id( *group_list ); |
| 337 | if( curve_info != NULL && |
Brett Warren | 14efd33 | 2021-10-06 09:32:11 +0100 | [diff] [blame] | 338 | mbedtls_ssl_tls13_named_group_is_ecdhe( *group_list ) ) |
Jerry Yu | 56fc07f | 2021-09-01 17:48:49 +0800 | [diff] [blame] | 339 | { |
Brett Warren | 14efd33 | 2021-10-06 09:32:11 +0100 | [diff] [blame] | 340 | *group_id = *group_list; |
Jerry Yu | 56fc07f | 2021-09-01 17:48:49 +0800 | [diff] [blame] | 341 | return( 0 ); |
| 342 | } |
| 343 | } |
| 344 | #else |
| 345 | ((void) ssl); |
Jerry Yu | b60e3cf | 2021-09-08 16:41:02 +0800 | [diff] [blame] | 346 | ((void) group_id); |
Jerry Yu | 56fc07f | 2021-09-01 17:48:49 +0800 | [diff] [blame] | 347 | #endif /* MBEDTLS_ECDH_C */ |
| 348 | |
| 349 | /* |
| 350 | * Add DHE named groups here. |
Jerry Yu | 388bd0d | 2021-09-15 18:41:02 +0800 | [diff] [blame] | 351 | * Pick first available DHE group compatible with TLS 1.3 |
Jerry Yu | 56fc07f | 2021-09-01 17:48:49 +0800 | [diff] [blame] | 352 | */ |
| 353 | |
| 354 | return( ret ); |
| 355 | } |
| 356 | |
| 357 | /* |
| 358 | * ssl_tls13_write_key_share_ext |
| 359 | * |
Jerry Yu | 388bd0d | 2021-09-15 18:41:02 +0800 | [diff] [blame] | 360 | * Structure of key_share extension in ClientHello: |
Jerry Yu | 56fc07f | 2021-09-01 17:48:49 +0800 | [diff] [blame] | 361 | * |
| 362 | * struct { |
| 363 | * NamedGroup group; |
| 364 | * opaque key_exchange<1..2^16-1>; |
| 365 | * } KeyShareEntry; |
| 366 | * struct { |
| 367 | * KeyShareEntry client_shares<0..2^16-1>; |
| 368 | * } KeyShareClientHello; |
| 369 | */ |
| 370 | static int ssl_tls13_write_key_share_ext( mbedtls_ssl_context *ssl, |
| 371 | unsigned char *buf, |
| 372 | unsigned char *end, |
Xiaofei Bai | d25fab6 | 2021-12-02 06:36:27 +0000 | [diff] [blame] | 373 | size_t *out_len ) |
Jerry Yu | 56fc07f | 2021-09-01 17:48:49 +0800 | [diff] [blame] | 374 | { |
| 375 | unsigned char *p = buf; |
Xiaofei Bai | eef1504 | 2021-11-18 07:29:56 +0000 | [diff] [blame] | 376 | unsigned char *client_shares; /* Start of client_shares */ |
| 377 | size_t client_shares_len; /* Length of client_shares */ |
Jerry Yu | 56fc07f | 2021-09-01 17:48:49 +0800 | [diff] [blame] | 378 | uint16_t group_id; |
Jerry Yu | 56fc07f | 2021-09-01 17:48:49 +0800 | [diff] [blame] | 379 | int ret = MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE; |
| 380 | |
Xiaofei Bai | d25fab6 | 2021-12-02 06:36:27 +0000 | [diff] [blame] | 381 | *out_len = 0; |
Jerry Yu | 56fc07f | 2021-09-01 17:48:49 +0800 | [diff] [blame] | 382 | |
Jerry Yu | b60e3cf | 2021-09-08 16:41:02 +0800 | [diff] [blame] | 383 | /* Check if we have space for header and length fields: |
Jerry Yu | 56fc07f | 2021-09-01 17:48:49 +0800 | [diff] [blame] | 384 | * - extension_type (2 bytes) |
| 385 | * - extension_data_length (2 bytes) |
| 386 | * - client_shares_length (2 bytes) |
| 387 | */ |
| 388 | MBEDTLS_SSL_CHK_BUF_PTR( p, end, 6 ); |
| 389 | p += 6; |
| 390 | |
| 391 | MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello: adding key share extension" ) ); |
| 392 | |
| 393 | /* HRR could already have requested something else. */ |
| 394 | group_id = ssl->handshake->offered_group_id; |
Jerry Yu | b60e3cf | 2021-09-08 16:41:02 +0800 | [diff] [blame] | 395 | if( !mbedtls_ssl_tls13_named_group_is_ecdhe( group_id ) && |
| 396 | !mbedtls_ssl_tls13_named_group_is_dhe( group_id ) ) |
Jerry Yu | 56fc07f | 2021-09-01 17:48:49 +0800 | [diff] [blame] | 397 | { |
Jerry Yu | b60e3cf | 2021-09-08 16:41:02 +0800 | [diff] [blame] | 398 | MBEDTLS_SSL_PROC_CHK( ssl_tls13_get_default_group_id( ssl, |
Jerry Yu | 56fc07f | 2021-09-01 17:48:49 +0800 | [diff] [blame] | 399 | &group_id ) ); |
| 400 | } |
| 401 | |
| 402 | /* |
| 403 | * Dispatch to type-specific key generation function. |
| 404 | * |
| 405 | * So far, we're only supporting ECDHE. With the introduction |
| 406 | * of PQC KEMs, we'll want to have multiple branches, one per |
| 407 | * type of KEM, and dispatch to the corresponding crypto. And |
| 408 | * only one key share entry is allowed. |
| 409 | */ |
Xiaofei Bai | eef1504 | 2021-11-18 07:29:56 +0000 | [diff] [blame] | 410 | client_shares = p; |
Jerry Yu | 56fc07f | 2021-09-01 17:48:49 +0800 | [diff] [blame] | 411 | #if defined(MBEDTLS_ECDH_C) |
Jerry Yu | b60e3cf | 2021-09-08 16:41:02 +0800 | [diff] [blame] | 412 | if( mbedtls_ssl_tls13_named_group_is_ecdhe( group_id ) ) |
Jerry Yu | 56fc07f | 2021-09-01 17:48:49 +0800 | [diff] [blame] | 413 | { |
Jerry Yu | 388bd0d | 2021-09-15 18:41:02 +0800 | [diff] [blame] | 414 | /* Pointer to group */ |
Xiaofei Bai | eef1504 | 2021-11-18 07:29:56 +0000 | [diff] [blame] | 415 | unsigned char *group = p; |
Jerry Yu | 56fc07f | 2021-09-01 17:48:49 +0800 | [diff] [blame] | 416 | /* Length of key_exchange */ |
Przemyslaw Stekiel | 4f419e5 | 2022-02-10 15:56:26 +0100 | [diff] [blame] | 417 | size_t key_exchange_len = 0; |
Jerry Yu | 56fc07f | 2021-09-01 17:48:49 +0800 | [diff] [blame] | 418 | |
| 419 | /* Check there is space for header of KeyShareEntry |
| 420 | * - group (2 bytes) |
| 421 | * - key_exchange_length (2 bytes) |
| 422 | */ |
| 423 | MBEDTLS_SSL_CHK_BUF_PTR( p, end, 4 ); |
| 424 | p += 4; |
Przemyslaw Stekiel | ea859c2 | 2022-02-10 10:19:46 +0100 | [diff] [blame] | 425 | ret = ssl_tls13_generate_and_write_ecdh_key_exchange( ssl, group_id, p, end, |
Jerry Yu | b60e3cf | 2021-09-08 16:41:02 +0800 | [diff] [blame] | 426 | &key_exchange_len ); |
Jerry Yu | 56fc07f | 2021-09-01 17:48:49 +0800 | [diff] [blame] | 427 | p += key_exchange_len; |
| 428 | if( ret != 0 ) |
| 429 | return( ret ); |
| 430 | |
| 431 | /* Write group */ |
Xiaofei Bai | eef1504 | 2021-11-18 07:29:56 +0000 | [diff] [blame] | 432 | MBEDTLS_PUT_UINT16_BE( group_id, group, 0 ); |
Jerry Yu | 56fc07f | 2021-09-01 17:48:49 +0800 | [diff] [blame] | 433 | /* Write key_exchange_length */ |
Xiaofei Bai | eef1504 | 2021-11-18 07:29:56 +0000 | [diff] [blame] | 434 | MBEDTLS_PUT_UINT16_BE( key_exchange_len, group, 2 ); |
Jerry Yu | 56fc07f | 2021-09-01 17:48:49 +0800 | [diff] [blame] | 435 | } |
| 436 | else |
| 437 | #endif /* MBEDTLS_ECDH_C */ |
| 438 | if( 0 /* other KEMs? */ ) |
| 439 | { |
| 440 | /* Do something */ |
| 441 | } |
| 442 | else |
| 443 | return( MBEDTLS_ERR_SSL_INTERNAL_ERROR ); |
| 444 | |
Jerry Yu | b60e3cf | 2021-09-08 16:41:02 +0800 | [diff] [blame] | 445 | /* Length of client_shares */ |
Xiaofei Bai | eef1504 | 2021-11-18 07:29:56 +0000 | [diff] [blame] | 446 | client_shares_len = p - client_shares; |
Jerry Yu | b60e3cf | 2021-09-08 16:41:02 +0800 | [diff] [blame] | 447 | if( client_shares_len == 0) |
| 448 | { |
| 449 | MBEDTLS_SSL_DEBUG_MSG( 1, ( "No key share defined." ) ); |
| 450 | return( MBEDTLS_ERR_SSL_INTERNAL_ERROR ); |
Jerry Yu | 7c522d4 | 2021-09-08 17:55:09 +0800 | [diff] [blame] | 451 | } |
Jerry Yu | 56fc07f | 2021-09-01 17:48:49 +0800 | [diff] [blame] | 452 | /* Write extension_type */ |
| 453 | MBEDTLS_PUT_UINT16_BE( MBEDTLS_TLS_EXT_KEY_SHARE, buf, 0 ); |
| 454 | /* Write extension_data_length */ |
Jerry Yu | b60e3cf | 2021-09-08 16:41:02 +0800 | [diff] [blame] | 455 | MBEDTLS_PUT_UINT16_BE( client_shares_len + 2, buf, 2 ); |
Jerry Yu | 56fc07f | 2021-09-01 17:48:49 +0800 | [diff] [blame] | 456 | /* Write client_shares_length */ |
Jerry Yu | b60e3cf | 2021-09-08 16:41:02 +0800 | [diff] [blame] | 457 | MBEDTLS_PUT_UINT16_BE( client_shares_len, buf, 4 ); |
Jerry Yu | 56fc07f | 2021-09-01 17:48:49 +0800 | [diff] [blame] | 458 | |
| 459 | /* Update offered_group_id field */ |
| 460 | ssl->handshake->offered_group_id = group_id; |
| 461 | |
| 462 | /* Output the total length of key_share extension. */ |
Xiaofei Bai | d25fab6 | 2021-12-02 06:36:27 +0000 | [diff] [blame] | 463 | *out_len = p - buf; |
Jerry Yu | 56fc07f | 2021-09-01 17:48:49 +0800 | [diff] [blame] | 464 | |
Xiaofei Bai | d25fab6 | 2021-12-02 06:36:27 +0000 | [diff] [blame] | 465 | MBEDTLS_SSL_DEBUG_BUF( 3, "client hello, key_share extension", buf, *out_len ); |
Jerry Yu | 56fc07f | 2021-09-01 17:48:49 +0800 | [diff] [blame] | 466 | |
| 467 | ssl->handshake->extensions_present |= MBEDTLS_SSL_EXT_KEY_SHARE; |
| 468 | |
| 469 | cleanup: |
| 470 | |
| 471 | return( ret ); |
| 472 | } |
Jerry Yu | bc20bdd | 2021-08-24 15:59:48 +0800 | [diff] [blame] | 473 | |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 474 | #if defined(MBEDTLS_ECDH_C) |
| 475 | |
Jerry Yu | c068b66 | 2021-10-11 22:30:19 +0800 | [diff] [blame] | 476 | static int ssl_tls13_read_public_ecdhe_share( mbedtls_ssl_context *ssl, |
| 477 | const unsigned char *buf, |
| 478 | size_t buf_len ) |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 479 | { |
Przemyslaw Stekiel | 9e23ddb | 2022-02-10 10:32:02 +0100 | [diff] [blame] | 480 | uint8_t *p = (uint8_t*)buf; |
| 481 | mbedtls_ssl_handshake_params *handshake = ssl->handshake; |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 482 | |
Przemyslaw Stekiel | 9e23ddb | 2022-02-10 10:32:02 +0100 | [diff] [blame] | 483 | /* Get size of the TLS opaque key_exchange field of the KeyShareEntry struct. */ |
| 484 | uint16_t peerkey_len = MBEDTLS_GET_UINT16_BE( p, 0 ); |
| 485 | p += 2; |
Jerry Yu | b85277e | 2021-10-13 13:36:05 +0800 | [diff] [blame] | 486 | |
Przemyslaw Stekiel | 9e23ddb | 2022-02-10 10:32:02 +0100 | [diff] [blame] | 487 | /* Check if key size is consistent with given buffer length. */ |
| 488 | if ( peerkey_len > ( buf_len - 2 ) ) |
| 489 | return( MBEDTLS_ERR_SSL_DECODE_ERROR ); |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 490 | |
Przemyslaw Stekiel | 9e23ddb | 2022-02-10 10:32:02 +0100 | [diff] [blame] | 491 | /* Store peer's ECDH public key. */ |
Przemyslaw Stekiel | 0f5ecef | 2022-02-14 17:10:05 +0100 | [diff] [blame] | 492 | memcpy( handshake->ecdh_psa_peerkey, p, peerkey_len ); |
Przemyslaw Stekiel | 9e23ddb | 2022-02-10 10:32:02 +0100 | [diff] [blame] | 493 | handshake->ecdh_psa_peerkey_len = peerkey_len; |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 494 | |
| 495 | return( 0 ); |
| 496 | } |
Jerry Yu | 4a17338 | 2021-10-11 21:45:31 +0800 | [diff] [blame] | 497 | #endif /* MBEDTLS_ECDH_C */ |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 498 | |
XiaokangQian | d59be77 | 2022-01-24 10:12:51 +0000 | [diff] [blame] | 499 | /* |
| 500 | * ssl_tls13_parse_hrr_key_share_ext() |
| 501 | * Parse key_share extension in Hello Retry Request |
| 502 | * |
| 503 | * struct { |
| 504 | * NamedGroup selected_group; |
| 505 | * } KeyShareHelloRetryRequest; |
| 506 | */ |
XiaokangQian | d9e068e | 2022-01-18 06:23:32 +0000 | [diff] [blame] | 507 | static int ssl_tls13_parse_hrr_key_share_ext( mbedtls_ssl_context *ssl, |
XiaokangQian | b851da8 | 2022-01-14 04:03:11 +0000 | [diff] [blame] | 508 | const unsigned char *buf, |
| 509 | const unsigned char *end ) |
| 510 | { |
XiaokangQian | b851da8 | 2022-01-14 04:03:11 +0000 | [diff] [blame] | 511 | const mbedtls_ecp_curve_info *curve_info = NULL; |
| 512 | const unsigned char *p = buf; |
XiaokangQian | d59be77 | 2022-01-24 10:12:51 +0000 | [diff] [blame] | 513 | int selected_group; |
XiaokangQian | b851da8 | 2022-01-14 04:03:11 +0000 | [diff] [blame] | 514 | int found = 0; |
| 515 | |
| 516 | const uint16_t *group_list = mbedtls_ssl_get_groups( ssl ); |
| 517 | if( group_list == NULL ) |
| 518 | return( MBEDTLS_ERR_SSL_BAD_CONFIG ); |
| 519 | |
| 520 | MBEDTLS_SSL_DEBUG_BUF( 3, "key_share extension", p, end - buf ); |
| 521 | |
| 522 | /* Read selected_group */ |
XiaokangQian | b48894e | 2022-01-17 02:05:52 +0000 | [diff] [blame] | 523 | MBEDTLS_SSL_CHK_BUF_READ_PTR( p, end, 2 ); |
XiaokangQian | d59be77 | 2022-01-24 10:12:51 +0000 | [diff] [blame] | 524 | selected_group = MBEDTLS_GET_UINT16_BE( p, 0 ); |
| 525 | MBEDTLS_SSL_DEBUG_MSG( 3, ( "selected_group ( %d )", selected_group ) ); |
XiaokangQian | b851da8 | 2022-01-14 04:03:11 +0000 | [diff] [blame] | 526 | |
| 527 | /* Upon receipt of this extension in a HelloRetryRequest, the client |
| 528 | * MUST first verify that the selected_group field corresponds to a |
| 529 | * group which was provided in the "supported_groups" extension in the |
| 530 | * original ClientHello. |
| 531 | * The supported_group was based on the info in ssl->conf->group_list. |
| 532 | * |
| 533 | * If the server provided a key share that was not sent in the ClientHello |
| 534 | * then the client MUST abort the handshake with an "illegal_parameter" alert. |
| 535 | */ |
XiaokangQian | d9e068e | 2022-01-18 06:23:32 +0000 | [diff] [blame] | 536 | for( ; *group_list != 0; group_list++ ) |
XiaokangQian | b851da8 | 2022-01-14 04:03:11 +0000 | [diff] [blame] | 537 | { |
| 538 | curve_info = mbedtls_ecp_curve_info_from_tls_id( *group_list ); |
XiaokangQian | d59be77 | 2022-01-24 10:12:51 +0000 | [diff] [blame] | 539 | if( curve_info == NULL || curve_info->tls_id != selected_group ) |
XiaokangQian | b851da8 | 2022-01-14 04:03:11 +0000 | [diff] [blame] | 540 | continue; |
| 541 | |
| 542 | /* We found a match */ |
| 543 | found = 1; |
| 544 | break; |
| 545 | } |
| 546 | |
| 547 | /* Client MUST verify that the selected_group field does not |
| 548 | * correspond to a group which was provided in the "key_share" |
| 549 | * extension in the original ClientHello. If the server sent an |
| 550 | * HRR message with a key share already provided in the |
| 551 | * ClientHello then the client MUST abort the handshake with |
| 552 | * an "illegal_parameter" alert. |
| 553 | */ |
XiaokangQian | d59be77 | 2022-01-24 10:12:51 +0000 | [diff] [blame] | 554 | if( found == 0 || selected_group == ssl->handshake->offered_group_id ) |
XiaokangQian | b851da8 | 2022-01-14 04:03:11 +0000 | [diff] [blame] | 555 | { |
| 556 | MBEDTLS_SSL_DEBUG_MSG( 1, ( "Invalid key share in HRR" ) ); |
| 557 | MBEDTLS_SSL_PEND_FATAL_ALERT( |
| 558 | MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER, |
| 559 | MBEDTLS_ERR_SSL_ILLEGAL_PARAMETER ); |
| 560 | return( MBEDTLS_ERR_SSL_ILLEGAL_PARAMETER ); |
| 561 | } |
| 562 | |
| 563 | /* Remember server's preference for next ClientHello */ |
XiaokangQian | d59be77 | 2022-01-24 10:12:51 +0000 | [diff] [blame] | 564 | ssl->handshake->offered_group_id = selected_group; |
XiaokangQian | b851da8 | 2022-01-14 04:03:11 +0000 | [diff] [blame] | 565 | |
| 566 | return( 0 ); |
| 567 | } |
| 568 | |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 569 | /* |
Jerry Yu | b85277e | 2021-10-13 13:36:05 +0800 | [diff] [blame] | 570 | * ssl_tls13_parse_key_share_ext() |
| 571 | * Parse key_share extension in Server Hello |
| 572 | * |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 573 | * struct { |
| 574 | * KeyShareEntry server_share; |
| 575 | * } KeyShareServerHello; |
| 576 | * struct { |
| 577 | * NamedGroup group; |
| 578 | * opaque key_exchange<1..2^16-1>; |
| 579 | * } KeyShareEntry; |
| 580 | */ |
Jerry Yu | 4a17338 | 2021-10-11 21:45:31 +0800 | [diff] [blame] | 581 | static int ssl_tls13_parse_key_share_ext( mbedtls_ssl_context *ssl, |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 582 | const unsigned char *buf, |
| 583 | const unsigned char *end ) |
| 584 | { |
Jerry Yu | b85277e | 2021-10-13 13:36:05 +0800 | [diff] [blame] | 585 | int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 586 | const unsigned char *p = buf; |
Jerry Yu | 4a17338 | 2021-10-11 21:45:31 +0800 | [diff] [blame] | 587 | uint16_t group, offered_group; |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 588 | |
Jerry Yu | 4a17338 | 2021-10-11 21:45:31 +0800 | [diff] [blame] | 589 | /* ... |
| 590 | * NamedGroup group; (2 bytes) |
| 591 | * ... |
| 592 | */ |
| 593 | MBEDTLS_SSL_CHK_BUF_READ_PTR( p, end, 2 ); |
| 594 | group = MBEDTLS_GET_UINT16_BE( p, 0 ); |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 595 | p += 2; |
| 596 | |
Jerry Yu | 4a17338 | 2021-10-11 21:45:31 +0800 | [diff] [blame] | 597 | /* Check that the chosen group matches the one we offered. */ |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 598 | offered_group = ssl->handshake->offered_group_id; |
Jerry Yu | 4a17338 | 2021-10-11 21:45:31 +0800 | [diff] [blame] | 599 | if( offered_group != group ) |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 600 | { |
| 601 | MBEDTLS_SSL_DEBUG_MSG( 1, |
| 602 | ( "Invalid server key share, our group %u, their group %u", |
Jerry Yu | 4a17338 | 2021-10-11 21:45:31 +0800 | [diff] [blame] | 603 | (unsigned) offered_group, (unsigned) group ) ); |
| 604 | MBEDTLS_SSL_PEND_FATAL_ALERT( MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE, |
| 605 | MBEDTLS_ERR_SSL_HANDSHAKE_FAILURE ); |
| 606 | return( MBEDTLS_ERR_SSL_HANDSHAKE_FAILURE ); |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 607 | } |
| 608 | |
| 609 | #if defined(MBEDTLS_ECDH_C) |
Jerry Yu | 4a17338 | 2021-10-11 21:45:31 +0800 | [diff] [blame] | 610 | if( mbedtls_ssl_tls13_named_group_is_ecdhe( group ) ) |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 611 | { |
Przemyslaw Stekiel | 9e23ddb | 2022-02-10 10:32:02 +0100 | [diff] [blame] | 612 | const mbedtls_ecp_curve_info *curve_info = |
| 613 | mbedtls_ecp_curve_info_from_tls_id( group ); |
| 614 | if( curve_info == NULL ) |
| 615 | { |
| 616 | MBEDTLS_SSL_DEBUG_MSG( 1, ( "Invalid TLS curve group id" ) ); |
| 617 | return( MBEDTLS_ERR_SSL_INTERNAL_ERROR ); |
| 618 | } |
| 619 | |
| 620 | MBEDTLS_SSL_DEBUG_MSG( 2, ( "ECDH curve: %s", curve_info->name ) ); |
| 621 | |
Jerry Yu | c068b66 | 2021-10-11 22:30:19 +0800 | [diff] [blame] | 622 | ret = ssl_tls13_read_public_ecdhe_share( ssl, p, end - p ); |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 623 | if( ret != 0 ) |
| 624 | return( ret ); |
| 625 | } |
Jerry Yu | b85277e | 2021-10-13 13:36:05 +0800 | [diff] [blame] | 626 | else |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 627 | #endif /* MBEDTLS_ECDH_C */ |
Jerry Yu | b85277e | 2021-10-13 13:36:05 +0800 | [diff] [blame] | 628 | if( 0 /* other KEMs? */ ) |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 629 | { |
| 630 | /* Do something */ |
| 631 | } |
| 632 | else |
| 633 | return( MBEDTLS_ERR_SSL_INTERNAL_ERROR ); |
| 634 | |
| 635 | ssl->handshake->extensions_present |= MBEDTLS_SSL_EXT_KEY_SHARE; |
| 636 | return( ret ); |
| 637 | } |
| 638 | |
Jerry Yu | bc20bdd | 2021-08-24 15:59:48 +0800 | [diff] [blame] | 639 | #endif /* MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED */ |
| 640 | |
XiaokangQian | d59be77 | 2022-01-24 10:12:51 +0000 | [diff] [blame] | 641 | /* |
| 642 | * ssl_tls13_parse_cookie_ext() |
| 643 | * Parse cookie extension in Hello Retry Request |
| 644 | * |
| 645 | * struct { |
| 646 | * opaque cookie<1..2^16-1>; |
| 647 | * } Cookie; |
| 648 | * |
| 649 | * When sending a HelloRetryRequest, the server MAY provide a "cookie" |
| 650 | * extension to the client (this is an exception to the usual rule that |
| 651 | * the only extensions that may be sent are those that appear in the |
| 652 | * ClientHello). When sending the new ClientHello, the client MUST copy |
| 653 | * the contents of the extension received in the HelloRetryRequest into |
| 654 | * a "cookie" extension in the new ClientHello. Clients MUST NOT use |
| 655 | * cookies in their initial ClientHello in subsequent connections. |
| 656 | */ |
XiaokangQian | 43550bd | 2022-01-21 04:32:58 +0000 | [diff] [blame] | 657 | static int ssl_tls13_parse_cookie_ext( mbedtls_ssl_context *ssl, |
| 658 | const unsigned char *buf, |
| 659 | const unsigned char *end ) |
| 660 | { |
XiaokangQian | 25c9c90 | 2022-02-08 10:49:53 +0000 | [diff] [blame] | 661 | uint16_t cookie_len; |
XiaokangQian | 43550bd | 2022-01-21 04:32:58 +0000 | [diff] [blame] | 662 | const unsigned char *p = buf; |
| 663 | mbedtls_ssl_handshake_params *handshake = ssl->handshake; |
| 664 | |
| 665 | /* Retrieve length field of cookie */ |
| 666 | MBEDTLS_SSL_CHK_BUF_READ_PTR( p, end, 2 ); |
| 667 | cookie_len = MBEDTLS_GET_UINT16_BE( p, 0 ); |
| 668 | p += 2; |
| 669 | |
| 670 | MBEDTLS_SSL_CHK_BUF_READ_PTR( p, end, cookie_len ); |
| 671 | MBEDTLS_SSL_DEBUG_BUF( 3, "cookie extension", p, cookie_len ); |
| 672 | |
XiaokangQian | 9b93c0d | 2022-02-09 06:02:25 +0000 | [diff] [blame] | 673 | mbedtls_free( handshake->cookie ); |
XiaokangQian | 25c9c90 | 2022-02-08 10:49:53 +0000 | [diff] [blame] | 674 | handshake->hrr_cookie_len = 0; |
XiaokangQian | 9b93c0d | 2022-02-09 06:02:25 +0000 | [diff] [blame] | 675 | handshake->cookie = mbedtls_calloc( 1, cookie_len ); |
| 676 | if( handshake->cookie == NULL ) |
XiaokangQian | 43550bd | 2022-01-21 04:32:58 +0000 | [diff] [blame] | 677 | { |
| 678 | MBEDTLS_SSL_DEBUG_MSG( 1, |
XiaokangQian | 25c9c90 | 2022-02-08 10:49:53 +0000 | [diff] [blame] | 679 | ( "alloc failed ( %ud bytes )", |
XiaokangQian | 43550bd | 2022-01-21 04:32:58 +0000 | [diff] [blame] | 680 | cookie_len ) ); |
| 681 | return( MBEDTLS_ERR_SSL_ALLOC_FAILED ); |
| 682 | } |
| 683 | |
XiaokangQian | 9b93c0d | 2022-02-09 06:02:25 +0000 | [diff] [blame] | 684 | memcpy( handshake->cookie, p, cookie_len ); |
XiaokangQian | 25c9c90 | 2022-02-08 10:49:53 +0000 | [diff] [blame] | 685 | handshake->hrr_cookie_len = cookie_len; |
XiaokangQian | 43550bd | 2022-01-21 04:32:58 +0000 | [diff] [blame] | 686 | |
| 687 | return( 0 ); |
| 688 | } |
XiaokangQian | 43550bd | 2022-01-21 04:32:58 +0000 | [diff] [blame] | 689 | |
XiaokangQian | 0b64eed | 2022-01-27 10:36:51 +0000 | [diff] [blame] | 690 | static int ssl_tls13_write_cookie_ext( mbedtls_ssl_context *ssl, |
XiaokangQian | 233397e | 2022-02-07 08:32:16 +0000 | [diff] [blame] | 691 | unsigned char *buf, |
| 692 | unsigned char *end, |
XiaokangQian | 9deb90f | 2022-02-08 10:31:07 +0000 | [diff] [blame] | 693 | size_t *out_len ) |
XiaokangQian | 0b64eed | 2022-01-27 10:36:51 +0000 | [diff] [blame] | 694 | { |
| 695 | unsigned char *p = buf; |
XiaokangQian | 9deb90f | 2022-02-08 10:31:07 +0000 | [diff] [blame] | 696 | *out_len = 0; |
XiaokangQian | c02768a | 2022-02-10 07:31:25 +0000 | [diff] [blame] | 697 | mbedtls_ssl_handshake_params *handshake = ssl->handshake; |
XiaokangQian | 0b64eed | 2022-01-27 10:36:51 +0000 | [diff] [blame] | 698 | |
XiaokangQian | c02768a | 2022-02-10 07:31:25 +0000 | [diff] [blame] | 699 | if( handshake->cookie == NULL ) |
XiaokangQian | 0b64eed | 2022-01-27 10:36:51 +0000 | [diff] [blame] | 700 | { |
| 701 | MBEDTLS_SSL_DEBUG_MSG( 3, ( "no cookie to send; skip extension" ) ); |
| 702 | return( 0 ); |
| 703 | } |
| 704 | |
| 705 | MBEDTLS_SSL_DEBUG_BUF( 3, "client hello, cookie", |
XiaokangQian | c02768a | 2022-02-10 07:31:25 +0000 | [diff] [blame] | 706 | handshake->cookie, |
| 707 | handshake->hrr_cookie_len ); |
XiaokangQian | 0b64eed | 2022-01-27 10:36:51 +0000 | [diff] [blame] | 708 | |
XiaokangQian | c02768a | 2022-02-10 07:31:25 +0000 | [diff] [blame] | 709 | MBEDTLS_SSL_CHK_BUF_PTR( p, end, handshake->hrr_cookie_len + 6 ); |
XiaokangQian | 0b64eed | 2022-01-27 10:36:51 +0000 | [diff] [blame] | 710 | |
| 711 | MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello, adding cookie extension" ) ); |
| 712 | |
XiaokangQian | 0b64eed | 2022-01-27 10:36:51 +0000 | [diff] [blame] | 713 | MBEDTLS_PUT_UINT16_BE( MBEDTLS_TLS_EXT_COOKIE, p, 0 ); |
XiaokangQian | c02768a | 2022-02-10 07:31:25 +0000 | [diff] [blame] | 714 | MBEDTLS_PUT_UINT16_BE( handshake->hrr_cookie_len + 2, p, 2 ); |
| 715 | MBEDTLS_PUT_UINT16_BE( handshake->hrr_cookie_len, p, 4 ); |
XiaokangQian | 233397e | 2022-02-07 08:32:16 +0000 | [diff] [blame] | 716 | p += 6; |
XiaokangQian | 0b64eed | 2022-01-27 10:36:51 +0000 | [diff] [blame] | 717 | |
| 718 | /* Cookie */ |
XiaokangQian | c02768a | 2022-02-10 07:31:25 +0000 | [diff] [blame] | 719 | memcpy( p, handshake->cookie, handshake->hrr_cookie_len ); |
XiaokangQian | 0b64eed | 2022-01-27 10:36:51 +0000 | [diff] [blame] | 720 | |
XiaokangQian | c02768a | 2022-02-10 07:31:25 +0000 | [diff] [blame] | 721 | *out_len = handshake->hrr_cookie_len + 6; |
XiaokangQian | 0b64eed | 2022-01-27 10:36:51 +0000 | [diff] [blame] | 722 | |
| 723 | return( 0 ); |
| 724 | } |
| 725 | |
Jerry Yu | 1bc2c1f | 2021-09-01 12:57:29 +0800 | [diff] [blame] | 726 | /* Write cipher_suites |
Jerry Yu | 6a64310 | 2021-08-31 14:40:36 +0800 | [diff] [blame] | 727 | * CipherSuite cipher_suites<2..2^16-2>; |
| 728 | */ |
Jerry Yu | 1bc2c1f | 2021-09-01 12:57:29 +0800 | [diff] [blame] | 729 | static int ssl_tls13_write_client_hello_cipher_suites( |
Jerry Yu | 6a64310 | 2021-08-31 14:40:36 +0800 | [diff] [blame] | 730 | mbedtls_ssl_context *ssl, |
| 731 | unsigned char *buf, |
| 732 | unsigned char *end, |
Xiaofei Bai | d25fab6 | 2021-12-02 06:36:27 +0000 | [diff] [blame] | 733 | size_t *out_len ) |
Jerry Yu | 6a64310 | 2021-08-31 14:40:36 +0800 | [diff] [blame] | 734 | { |
Jerry Yu | fec982e | 2021-09-07 17:26:06 +0800 | [diff] [blame] | 735 | unsigned char *p = buf; |
Jerry Yu | 0c63af6 | 2021-09-02 12:59:12 +0800 | [diff] [blame] | 736 | const int *ciphersuite_list; |
Xiaofei Bai | eef1504 | 2021-11-18 07:29:56 +0000 | [diff] [blame] | 737 | unsigned char *cipher_suites; /* Start of the cipher_suites list */ |
Jerry Yu | 1bc2c1f | 2021-09-01 12:57:29 +0800 | [diff] [blame] | 738 | size_t cipher_suites_len; |
Jerry Yu | 92c6b40 | 2021-08-27 16:59:09 +0800 | [diff] [blame] | 739 | |
Xiaofei Bai | d25fab6 | 2021-12-02 06:36:27 +0000 | [diff] [blame] | 740 | *out_len = 0 ; |
Jerry Yu | 6a64310 | 2021-08-31 14:40:36 +0800 | [diff] [blame] | 741 | |
| 742 | /* |
| 743 | * Ciphersuite list |
| 744 | * |
| 745 | * This is a list of the symmetric cipher options supported by |
| 746 | * the client, specifically the record protection algorithm |
| 747 | * ( including secret key length ) and a hash to be used with |
| 748 | * HKDF, in descending order of client preference. |
| 749 | */ |
Jerry Yu | 0c63af6 | 2021-09-02 12:59:12 +0800 | [diff] [blame] | 750 | ciphersuite_list = ssl->conf->ciphersuite_list; |
Jerry Yu | 6a64310 | 2021-08-31 14:40:36 +0800 | [diff] [blame] | 751 | |
Jerry Yu | 1bc2c1f | 2021-09-01 12:57:29 +0800 | [diff] [blame] | 752 | /* Check there is space for the cipher suite list length (2 bytes). */ |
Jerry Yu | 4e38828 | 2021-09-06 21:28:08 +0800 | [diff] [blame] | 753 | MBEDTLS_SSL_CHK_BUF_PTR( p, end, 2 ); |
| 754 | p += 2; |
Jerry Yu | 6a64310 | 2021-08-31 14:40:36 +0800 | [diff] [blame] | 755 | |
Jerry Yu | 0c63af6 | 2021-09-02 12:59:12 +0800 | [diff] [blame] | 756 | /* Write cipher_suites */ |
Xiaofei Bai | eef1504 | 2021-11-18 07:29:56 +0000 | [diff] [blame] | 757 | cipher_suites = p; |
Jerry Yu | 0c63af6 | 2021-09-02 12:59:12 +0800 | [diff] [blame] | 758 | for ( size_t i = 0; ciphersuite_list[i] != 0; i++ ) |
Jerry Yu | 6a64310 | 2021-08-31 14:40:36 +0800 | [diff] [blame] | 759 | { |
Jerry Yu | 0c63af6 | 2021-09-02 12:59:12 +0800 | [diff] [blame] | 760 | int cipher_suite = ciphersuite_list[i]; |
Jerry Yu | 1bc2c1f | 2021-09-01 12:57:29 +0800 | [diff] [blame] | 761 | const mbedtls_ssl_ciphersuite_t *ciphersuite_info; |
Jerry Yu | 6a64310 | 2021-08-31 14:40:36 +0800 | [diff] [blame] | 762 | |
Jerry Yu | 1bc2c1f | 2021-09-01 12:57:29 +0800 | [diff] [blame] | 763 | ciphersuite_info = mbedtls_ssl_ciphersuite_from_id( cipher_suite ); |
Jerry Yu | 6a64310 | 2021-08-31 14:40:36 +0800 | [diff] [blame] | 764 | if( ciphersuite_info == NULL ) |
| 765 | continue; |
Jerry Yu | dbfb7bd | 2021-09-04 09:58:58 +0800 | [diff] [blame] | 766 | if( !( MBEDTLS_SSL_MINOR_VERSION_4 >= ciphersuite_info->min_minor_ver && |
| 767 | MBEDTLS_SSL_MINOR_VERSION_4 <= ciphersuite_info->max_minor_ver ) ) |
Jerry Yu | 6a64310 | 2021-08-31 14:40:36 +0800 | [diff] [blame] | 768 | continue; |
| 769 | |
| 770 | MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello, add ciphersuite: %04x, %s", |
Jerry Yu | 1bc2c1f | 2021-09-01 12:57:29 +0800 | [diff] [blame] | 771 | (unsigned int) cipher_suite, |
Jerry Yu | 6a64310 | 2021-08-31 14:40:36 +0800 | [diff] [blame] | 772 | ciphersuite_info->name ) ); |
| 773 | |
Jerry Yu | 1bc2c1f | 2021-09-01 12:57:29 +0800 | [diff] [blame] | 774 | /* Check there is space for the cipher suite identifier (2 bytes). */ |
Jerry Yu | bbe0952 | 2021-09-06 21:17:54 +0800 | [diff] [blame] | 775 | MBEDTLS_SSL_CHK_BUF_PTR( p, end, 2 ); |
| 776 | MBEDTLS_PUT_UINT16_BE( cipher_suite, p, 0 ); |
| 777 | p += 2; |
Jerry Yu | 6a64310 | 2021-08-31 14:40:36 +0800 | [diff] [blame] | 778 | } |
| 779 | |
Jerry Yu | 0c63af6 | 2021-09-02 12:59:12 +0800 | [diff] [blame] | 780 | /* Write the cipher_suites length in number of bytes */ |
Xiaofei Bai | eef1504 | 2021-11-18 07:29:56 +0000 | [diff] [blame] | 781 | cipher_suites_len = p - cipher_suites; |
Jerry Yu | 1bc2c1f | 2021-09-01 12:57:29 +0800 | [diff] [blame] | 782 | MBEDTLS_PUT_UINT16_BE( cipher_suites_len, buf, 0 ); |
Jerry Yu | 6a64310 | 2021-08-31 14:40:36 +0800 | [diff] [blame] | 783 | MBEDTLS_SSL_DEBUG_MSG( 3, |
Jerry Yu | 1bc2c1f | 2021-09-01 12:57:29 +0800 | [diff] [blame] | 784 | ( "client hello, got %" MBEDTLS_PRINTF_SIZET " cipher suites", |
| 785 | cipher_suites_len/2 ) ); |
Jerry Yu | 6a64310 | 2021-08-31 14:40:36 +0800 | [diff] [blame] | 786 | |
Jerry Yu | 1bc2c1f | 2021-09-01 12:57:29 +0800 | [diff] [blame] | 787 | /* Output the total length of cipher_suites field. */ |
Xiaofei Bai | d25fab6 | 2021-12-02 06:36:27 +0000 | [diff] [blame] | 788 | *out_len = p - buf; |
Jerry Yu | f171e83 | 2021-08-31 18:31:09 +0800 | [diff] [blame] | 789 | |
Jerry Yu | 6a64310 | 2021-08-31 14:40:36 +0800 | [diff] [blame] | 790 | return( 0 ); |
| 791 | } |
| 792 | |
Jerry Yu | 1bc2c1f | 2021-09-01 12:57:29 +0800 | [diff] [blame] | 793 | /* |
| 794 | * Structure of ClientHello message: |
| 795 | * |
| 796 | * struct { |
| 797 | * ProtocolVersion legacy_version = 0x0303; // TLS v1.2 |
| 798 | * Random random; |
| 799 | * opaque legacy_session_id<0..32>; |
| 800 | * CipherSuite cipher_suites<2..2^16-2>; |
| 801 | * opaque legacy_compression_methods<1..2^8-1>; |
| 802 | * Extension extensions<8..2^16-1>; |
| 803 | * } ClientHello; |
| 804 | */ |
Jerry Yu | 08906d0 | 2021-08-31 11:05:27 +0800 | [diff] [blame] | 805 | static int ssl_tls13_write_client_hello_body( mbedtls_ssl_context *ssl, |
Jerry Yu | eecfbf0 | 2021-08-30 18:32:07 +0800 | [diff] [blame] | 806 | unsigned char *buf, |
Jerry Yu | ef387d7 | 2021-09-02 13:59:41 +0800 | [diff] [blame] | 807 | unsigned char *end, |
Xiaofei Bai | d25fab6 | 2021-12-02 06:36:27 +0000 | [diff] [blame] | 808 | size_t *out_len ) |
Jerry Yu | 65dd2cc | 2021-08-18 16:38:40 +0800 | [diff] [blame] | 809 | { |
Jerry Yu | bc20bdd | 2021-08-24 15:59:48 +0800 | [diff] [blame] | 810 | |
Jerry Yu | bc20bdd | 2021-08-24 15:59:48 +0800 | [diff] [blame] | 811 | int ret; |
Xiaofei Bai | eef1504 | 2021-11-18 07:29:56 +0000 | [diff] [blame] | 812 | unsigned char *p_extensions_len; /* Pointer to extensions length */ |
| 813 | size_t output_len; /* Length of buffer used by function */ |
| 814 | size_t extensions_len; /* Length of the list of extensions*/ |
Jerry Yu | bc20bdd | 2021-08-24 15:59:48 +0800 | [diff] [blame] | 815 | |
Jerry Yu | bc20bdd | 2021-08-24 15:59:48 +0800 | [diff] [blame] | 816 | /* Buffer management */ |
Jerry Yu | bbe0952 | 2021-09-06 21:17:54 +0800 | [diff] [blame] | 817 | unsigned char *p = buf; |
Jerry Yu | bc20bdd | 2021-08-24 15:59:48 +0800 | [diff] [blame] | 818 | |
Xiaofei Bai | d25fab6 | 2021-12-02 06:36:27 +0000 | [diff] [blame] | 819 | *out_len = 0; |
Jerry Yu | bc20bdd | 2021-08-24 15:59:48 +0800 | [diff] [blame] | 820 | |
Jerry Yu | 1bc2c1f | 2021-09-01 12:57:29 +0800 | [diff] [blame] | 821 | /* No validation needed here. It has been done by ssl_conf_check() */ |
Jerry Yu | bc20bdd | 2021-08-24 15:59:48 +0800 | [diff] [blame] | 822 | ssl->major_ver = ssl->conf->min_major_ver; |
| 823 | ssl->minor_ver = ssl->conf->min_minor_ver; |
| 824 | |
Jerry Yu | 1bc2c1f | 2021-09-01 12:57:29 +0800 | [diff] [blame] | 825 | /* |
| 826 | * Write legacy_version |
Jerry Yu | 6a64310 | 2021-08-31 14:40:36 +0800 | [diff] [blame] | 827 | * ProtocolVersion legacy_version = 0x0303; // TLS v1.2 |
Jerry Yu | 1bc2c1f | 2021-09-01 12:57:29 +0800 | [diff] [blame] | 828 | * |
| 829 | * For TLS 1.3 we use the legacy version number {0x03, 0x03} |
Jerry Yu | bc20bdd | 2021-08-24 15:59:48 +0800 | [diff] [blame] | 830 | * instead of the true version number. |
Jerry Yu | bc20bdd | 2021-08-24 15:59:48 +0800 | [diff] [blame] | 831 | */ |
Jerry Yu | fec982e | 2021-09-07 17:26:06 +0800 | [diff] [blame] | 832 | MBEDTLS_SSL_CHK_BUF_PTR( p, end, 2 ); |
Jerry Yu | bbe0952 | 2021-09-06 21:17:54 +0800 | [diff] [blame] | 833 | MBEDTLS_PUT_UINT16_BE( 0x0303, p, 0 ); |
Jerry Yu | fec982e | 2021-09-07 17:26:06 +0800 | [diff] [blame] | 834 | p += 2; |
Jerry Yu | bc20bdd | 2021-08-24 15:59:48 +0800 | [diff] [blame] | 835 | |
Jerry Yu | 1bc2c1f | 2021-09-01 12:57:29 +0800 | [diff] [blame] | 836 | /* Write the random bytes ( random ).*/ |
Jerry Yu | e6d7e5c | 2021-10-26 10:44:32 +0800 | [diff] [blame] | 837 | MBEDTLS_SSL_CHK_BUF_PTR( p, end, MBEDTLS_CLIENT_HELLO_RANDOM_LEN ); |
| 838 | memcpy( p, ssl->handshake->randbytes, MBEDTLS_CLIENT_HELLO_RANDOM_LEN ); |
Jerry Yu | e885b76 | 2021-08-26 17:32:34 +0800 | [diff] [blame] | 839 | MBEDTLS_SSL_DEBUG_BUF( 3, "client hello, random bytes", |
Jerry Yu | e6d7e5c | 2021-10-26 10:44:32 +0800 | [diff] [blame] | 840 | p, MBEDTLS_CLIENT_HELLO_RANDOM_LEN ); |
| 841 | p += MBEDTLS_CLIENT_HELLO_RANDOM_LEN; |
Jerry Yu | bc20bdd | 2021-08-24 15:59:48 +0800 | [diff] [blame] | 842 | |
Jerry Yu | 1bc2c1f | 2021-09-01 12:57:29 +0800 | [diff] [blame] | 843 | /* |
| 844 | * Write legacy_session_id |
| 845 | * |
| 846 | * Versions of TLS before TLS 1.3 supported a "session resumption" feature |
| 847 | * which has been merged with pre-shared keys in this version. A client |
| 848 | * which has a cached session ID set by a pre-TLS 1.3 server SHOULD set |
| 849 | * this field to that value. In compatibility mode, this field MUST be |
| 850 | * non-empty, so a client not offering a pre-TLS 1.3 session MUST generate |
| 851 | * a new 32-byte value. This value need not be random but SHOULD be |
| 852 | * unpredictable to avoid implementations fixating on a specific value |
| 853 | * ( also known as ossification ). Otherwise, it MUST be set as a zero-length |
| 854 | * vector ( i.e., a zero-valued single byte length field ). |
Jerry Yu | bc20bdd | 2021-08-24 15:59:48 +0800 | [diff] [blame] | 855 | */ |
Ronald Cron | 49ad619 | 2021-11-24 16:25:31 +0100 | [diff] [blame] | 856 | #if defined(MBEDTLS_SSL_TLS1_3_COMPATIBILITY_MODE) |
| 857 | MBEDTLS_SSL_CHK_BUF_PTR( p, end, ssl->session_negotiate->id_len + 1 ); |
| 858 | *p++ = (unsigned char)ssl->session_negotiate->id_len; |
| 859 | memcpy( p, ssl->session_negotiate->id, ssl->session_negotiate->id_len ); |
| 860 | p += ssl->session_negotiate->id_len; |
| 861 | |
| 862 | MBEDTLS_SSL_DEBUG_BUF( 3, "session id", ssl->session_negotiate->id, |
| 863 | ssl->session_negotiate->id_len ); |
| 864 | #else |
Jerry Yu | bbe0952 | 2021-09-06 21:17:54 +0800 | [diff] [blame] | 865 | MBEDTLS_SSL_CHK_BUF_PTR( p, end, 1 ); |
| 866 | *p++ = 0; /* session id length set to zero */ |
Ronald Cron | 49ad619 | 2021-11-24 16:25:31 +0100 | [diff] [blame] | 867 | #endif /* MBEDTLS_SSL_TLS1_3_COMPATIBILITY_MODE */ |
Jerry Yu | bc20bdd | 2021-08-24 15:59:48 +0800 | [diff] [blame] | 868 | |
Jerry Yu | 1bc2c1f | 2021-09-01 12:57:29 +0800 | [diff] [blame] | 869 | /* Write cipher_suites */ |
Jerry Yu | bbe0952 | 2021-09-06 21:17:54 +0800 | [diff] [blame] | 870 | ret = ssl_tls13_write_client_hello_cipher_suites( ssl, p, end, &output_len ); |
Jerry Yu | dbfb7bd | 2021-09-04 09:58:58 +0800 | [diff] [blame] | 871 | if( ret != 0 ) |
Jerry Yu | 6a64310 | 2021-08-31 14:40:36 +0800 | [diff] [blame] | 872 | return( ret ); |
Jerry Yu | bbe0952 | 2021-09-06 21:17:54 +0800 | [diff] [blame] | 873 | p += output_len; |
Jerry Yu | bc20bdd | 2021-08-24 15:59:48 +0800 | [diff] [blame] | 874 | |
Jerry Yu | 1bc2c1f | 2021-09-01 12:57:29 +0800 | [diff] [blame] | 875 | /* Write legacy_compression_methods |
| 876 | * |
| 877 | * For every TLS 1.3 ClientHello, this vector MUST contain exactly |
Jerry Yu | bc20bdd | 2021-08-24 15:59:48 +0800 | [diff] [blame] | 878 | * one byte set to zero, which corresponds to the 'null' compression |
| 879 | * method in prior versions of TLS. |
Jerry Yu | bc20bdd | 2021-08-24 15:59:48 +0800 | [diff] [blame] | 880 | */ |
Jerry Yu | bbe0952 | 2021-09-06 21:17:54 +0800 | [diff] [blame] | 881 | MBEDTLS_SSL_CHK_BUF_PTR( p, end, 2 ); |
| 882 | *p++ = 1; |
| 883 | *p++ = MBEDTLS_SSL_COMPRESS_NULL; |
Jerry Yu | bc20bdd | 2021-08-24 15:59:48 +0800 | [diff] [blame] | 884 | |
Jerry Yu | 1bc2c1f | 2021-09-01 12:57:29 +0800 | [diff] [blame] | 885 | /* Write extensions */ |
| 886 | |
| 887 | /* Keeping track of the included extensions */ |
| 888 | ssl->handshake->extensions_present = MBEDTLS_SSL_EXT_NONE; |
Jerry Yu | bc20bdd | 2021-08-24 15:59:48 +0800 | [diff] [blame] | 889 | |
| 890 | /* First write extensions, then the total length */ |
Jerry Yu | bbe0952 | 2021-09-06 21:17:54 +0800 | [diff] [blame] | 891 | MBEDTLS_SSL_CHK_BUF_PTR( p, end, 2 ); |
Xiaofei Bai | eef1504 | 2021-11-18 07:29:56 +0000 | [diff] [blame] | 892 | p_extensions_len = p; |
Jerry Yu | bbe0952 | 2021-09-06 21:17:54 +0800 | [diff] [blame] | 893 | p += 2; |
Jerry Yu | bc20bdd | 2021-08-24 15:59:48 +0800 | [diff] [blame] | 894 | |
Jerry Yu | 1bc2c1f | 2021-09-01 12:57:29 +0800 | [diff] [blame] | 895 | /* Write supported_versions extension |
Jerry Yu | bc20bdd | 2021-08-24 15:59:48 +0800 | [diff] [blame] | 896 | * |
Jerry Yu | 1bc2c1f | 2021-09-01 12:57:29 +0800 | [diff] [blame] | 897 | * Supported Versions Extension is mandatory with TLS 1.3. |
Jerry Yu | bc20bdd | 2021-08-24 15:59:48 +0800 | [diff] [blame] | 898 | */ |
Jerry Yu | bbe0952 | 2021-09-06 21:17:54 +0800 | [diff] [blame] | 899 | ret = ssl_tls13_write_supported_versions_ext( ssl, p, end, &output_len ); |
Jerry Yu | 92c6b40 | 2021-08-27 16:59:09 +0800 | [diff] [blame] | 900 | if( ret != 0 ) |
| 901 | return( ret ); |
Jerry Yu | bbe0952 | 2021-09-06 21:17:54 +0800 | [diff] [blame] | 902 | p += output_len; |
Jerry Yu | bc20bdd | 2021-08-24 15:59:48 +0800 | [diff] [blame] | 903 | |
lhuang04 | 86cacac | 2022-01-21 07:34:27 -0800 | [diff] [blame] | 904 | #if defined(MBEDTLS_SSL_ALPN) |
Ronald Cron | a0855a6 | 2022-03-09 10:04:54 +0100 | [diff] [blame] | 905 | ret = ssl_tls13_write_alpn_ext( ssl, p, end, &output_len ); |
lhuang04 | 86cacac | 2022-01-21 07:34:27 -0800 | [diff] [blame] | 906 | if( ret != 0 ) |
| 907 | return( ret ); |
| 908 | p += output_len; |
| 909 | #endif /* MBEDTLS_SSL_ALPN */ |
| 910 | |
XiaokangQian | 233397e | 2022-02-07 08:32:16 +0000 | [diff] [blame] | 911 | /* Echo the cookie if the server provided one in its preceding |
| 912 | * HelloRetryRequest message. |
| 913 | */ |
XiaokangQian | 0b64eed | 2022-01-27 10:36:51 +0000 | [diff] [blame] | 914 | ret = ssl_tls13_write_cookie_ext( ssl, p, end, &output_len ); |
| 915 | if( ret != 0 ) |
| 916 | return( ret ); |
| 917 | p += output_len; |
| 918 | |
Jerry Yu | bc20bdd | 2021-08-24 15:59:48 +0800 | [diff] [blame] | 919 | #if defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED) |
Jerry Yu | bc20bdd | 2021-08-24 15:59:48 +0800 | [diff] [blame] | 920 | |
Jerry Yu | b925f21 | 2022-01-12 11:17:02 +0800 | [diff] [blame] | 921 | /* |
| 922 | * Add the extensions related to (EC)DHE ephemeral key establishment only if |
| 923 | * enabled as per the configuration. |
Jerry Yu | bc20bdd | 2021-08-24 15:59:48 +0800 | [diff] [blame] | 924 | */ |
Jerry Yu | f46b016 | 2022-01-11 16:28:00 +0800 | [diff] [blame] | 925 | if( mbedtls_ssl_conf_tls13_some_ephemeral_enabled( ssl ) ) |
| 926 | { |
| 927 | ret = mbedtls_ssl_write_supported_groups_ext( ssl, p, end, &output_len ); |
| 928 | if( ret != 0 ) |
| 929 | return( ret ); |
| 930 | p += output_len; |
Jerry Yu | 6a64310 | 2021-08-31 14:40:36 +0800 | [diff] [blame] | 931 | |
Jerry Yu | f46b016 | 2022-01-11 16:28:00 +0800 | [diff] [blame] | 932 | ret = ssl_tls13_write_key_share_ext( ssl, p, end, &output_len ); |
| 933 | if( ret != 0 ) |
| 934 | return( ret ); |
| 935 | p += output_len; |
Jerry Yu | 1bc2c1f | 2021-09-01 12:57:29 +0800 | [diff] [blame] | 936 | |
Jerry Yu | f017ee4 | 2022-01-12 15:49:48 +0800 | [diff] [blame] | 937 | ret = mbedtls_ssl_write_sig_alg_ext( ssl, p, end, &output_len ); |
Jerry Yu | f46b016 | 2022-01-11 16:28:00 +0800 | [diff] [blame] | 938 | if( ret != 0 ) |
| 939 | return( ret ); |
| 940 | p += output_len; |
| 941 | } |
Jerry Yu | bc20bdd | 2021-08-24 15:59:48 +0800 | [diff] [blame] | 942 | #endif /* MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED */ |
| 943 | |
Xiaofei Bai | 15a5681 | 2021-11-05 10:52:12 +0000 | [diff] [blame] | 944 | #if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION) |
Xiaofei Bai | 58afdba | 2021-11-09 03:10:05 +0000 | [diff] [blame] | 945 | /* Write server name extension */ |
Xiaofei Bai | 15a5681 | 2021-11-05 10:52:12 +0000 | [diff] [blame] | 946 | ret = mbedtls_ssl_write_hostname_ext( ssl, p, end, &output_len ); |
| 947 | if( ret != 0 ) |
| 948 | return( ret ); |
| 949 | p += output_len; |
| 950 | #endif /* MBEDTLS_SSL_SERVER_NAME_INDICATION */ |
| 951 | |
Jerry Yu | bc20bdd | 2021-08-24 15:59:48 +0800 | [diff] [blame] | 952 | /* Add more extensions here */ |
| 953 | |
Jerry Yu | 1bc2c1f | 2021-09-01 12:57:29 +0800 | [diff] [blame] | 954 | /* Write the length of the list of extensions. */ |
Xiaofei Bai | eef1504 | 2021-11-18 07:29:56 +0000 | [diff] [blame] | 955 | extensions_len = p - p_extensions_len - 2; |
| 956 | MBEDTLS_PUT_UINT16_BE( extensions_len, p_extensions_len, 0 ); |
Jerry Yu | bc20bdd | 2021-08-24 15:59:48 +0800 | [diff] [blame] | 957 | MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello, total extension length: %" MBEDTLS_PRINTF_SIZET , |
Jerry Yu | 790656a | 2021-09-01 15:51:48 +0800 | [diff] [blame] | 958 | extensions_len ) ); |
Xiaofei Bai | eef1504 | 2021-11-18 07:29:56 +0000 | [diff] [blame] | 959 | MBEDTLS_SSL_DEBUG_BUF( 3, "client hello extensions", p_extensions_len, extensions_len ); |
Jerry Yu | bc20bdd | 2021-08-24 15:59:48 +0800 | [diff] [blame] | 960 | |
Xiaofei Bai | d25fab6 | 2021-12-02 06:36:27 +0000 | [diff] [blame] | 961 | *out_len = p - buf; |
Jerry Yu | bc20bdd | 2021-08-24 15:59:48 +0800 | [diff] [blame] | 962 | return( 0 ); |
| 963 | } |
| 964 | |
Jerry Yu | 92c6b40 | 2021-08-27 16:59:09 +0800 | [diff] [blame] | 965 | static int ssl_tls13_prepare_client_hello( mbedtls_ssl_context *ssl ) |
| 966 | { |
| 967 | int ret; |
Jerry Yu | ef6b36b | 2021-08-24 16:29:02 +0800 | [diff] [blame] | 968 | |
Jerry Yu | 92c6b40 | 2021-08-27 16:59:09 +0800 | [diff] [blame] | 969 | if( ssl->conf->f_rng == NULL ) |
| 970 | { |
| 971 | MBEDTLS_SSL_DEBUG_MSG( 1, ( "no RNG provided" ) ); |
| 972 | return( MBEDTLS_ERR_SSL_NO_RNG ); |
| 973 | } |
Jerry Yu | ef6b36b | 2021-08-24 16:29:02 +0800 | [diff] [blame] | 974 | |
Jerry Yu | 92c6b40 | 2021-08-27 16:59:09 +0800 | [diff] [blame] | 975 | if( ( ret = ssl->conf->f_rng( ssl->conf->p_rng, |
| 976 | ssl->handshake->randbytes, |
Jerry Yu | e6d7e5c | 2021-10-26 10:44:32 +0800 | [diff] [blame] | 977 | MBEDTLS_CLIENT_HELLO_RANDOM_LEN ) ) != 0 ) |
Jerry Yu | 92c6b40 | 2021-08-27 16:59:09 +0800 | [diff] [blame] | 978 | { |
Jerry Yu | 8c02bb4 | 2021-09-03 21:09:22 +0800 | [diff] [blame] | 979 | MBEDTLS_SSL_DEBUG_RET( 1, "f_rng", ret ); |
Jerry Yu | 92c6b40 | 2021-08-27 16:59:09 +0800 | [diff] [blame] | 980 | return( ret ); |
| 981 | } |
Jerry Yu | 6f13f64 | 2021-08-26 17:18:15 +0800 | [diff] [blame] | 982 | |
Ronald Cron | 49ad619 | 2021-11-24 16:25:31 +0100 | [diff] [blame] | 983 | #if defined(MBEDTLS_SSL_TLS1_3_COMPATIBILITY_MODE) |
| 984 | /* |
| 985 | * Create a session identifier for the purpose of middlebox compatibility |
| 986 | * only if one has not been created already. |
| 987 | */ |
| 988 | if( ssl->session_negotiate->id_len == 0 ) |
| 989 | { |
| 990 | /* Creating a session id with 32 byte length */ |
| 991 | if( ( ret = ssl->conf->f_rng( ssl->conf->p_rng, |
| 992 | ssl->session_negotiate->id, 32 ) ) != 0 ) |
| 993 | { |
| 994 | MBEDTLS_SSL_DEBUG_RET( 1, "creating session id failed", ret ); |
| 995 | return( ret ); |
| 996 | } |
| 997 | ssl->session_negotiate->id_len = 32; |
| 998 | } |
| 999 | #endif /* MBEDTLS_SSL_TLS1_3_COMPATIBILITY_MODE */ |
| 1000 | |
Jerry Yu | 6f13f64 | 2021-08-26 17:18:15 +0800 | [diff] [blame] | 1001 | return( 0 ); |
Jerry Yu | bc20bdd | 2021-08-24 15:59:48 +0800 | [diff] [blame] | 1002 | } |
| 1003 | |
Jerry Yu | 92c6b40 | 2021-08-27 16:59:09 +0800 | [diff] [blame] | 1004 | /* |
Jerry Yu | 159c5a0 | 2021-08-31 12:51:25 +0800 | [diff] [blame] | 1005 | * Write ClientHello handshake message. |
Jerry Yu | 687101b | 2021-09-14 16:03:56 +0800 | [diff] [blame] | 1006 | * Handler for MBEDTLS_SSL_CLIENT_HELLO |
Jerry Yu | 92c6b40 | 2021-08-27 16:59:09 +0800 | [diff] [blame] | 1007 | */ |
| 1008 | static int ssl_tls13_write_client_hello( mbedtls_ssl_context *ssl ) |
Jerry Yu | bc20bdd | 2021-08-24 15:59:48 +0800 | [diff] [blame] | 1009 | { |
Jerry Yu | 92c6b40 | 2021-08-27 16:59:09 +0800 | [diff] [blame] | 1010 | int ret = 0; |
| 1011 | unsigned char *buf; |
| 1012 | size_t buf_len, msg_len; |
| 1013 | |
| 1014 | MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write client hello" ) ); |
| 1015 | |
Jerry Yu | 2c0fbf3 | 2021-09-02 13:53:46 +0800 | [diff] [blame] | 1016 | MBEDTLS_SSL_PROC_CHK( ssl_tls13_prepare_client_hello( ssl ) ); |
Jerry Yu | 92c6b40 | 2021-08-27 16:59:09 +0800 | [diff] [blame] | 1017 | |
Jerry Yu | 2c0fbf3 | 2021-09-02 13:53:46 +0800 | [diff] [blame] | 1018 | MBEDTLS_SSL_PROC_CHK( mbedtls_ssl_tls13_start_handshake_msg( |
| 1019 | ssl, MBEDTLS_SSL_HS_CLIENT_HELLO, |
| 1020 | &buf, &buf_len ) ); |
Jerry Yu | 92c6b40 | 2021-08-27 16:59:09 +0800 | [diff] [blame] | 1021 | |
Jerry Yu | 2c0fbf3 | 2021-09-02 13:53:46 +0800 | [diff] [blame] | 1022 | MBEDTLS_SSL_PROC_CHK( ssl_tls13_write_client_hello_body( ssl, buf, |
Jerry Yu | ef387d7 | 2021-09-02 13:59:41 +0800 | [diff] [blame] | 1023 | buf + buf_len, |
Jerry Yu | 2c0fbf3 | 2021-09-02 13:53:46 +0800 | [diff] [blame] | 1024 | &msg_len ) ); |
Jerry Yu | 92c6b40 | 2021-08-27 16:59:09 +0800 | [diff] [blame] | 1025 | |
Jerry Yu | 2c0fbf3 | 2021-09-02 13:53:46 +0800 | [diff] [blame] | 1026 | mbedtls_ssl_tls13_add_hs_hdr_to_checksum( ssl, |
| 1027 | MBEDTLS_SSL_HS_CLIENT_HELLO, |
Jerry Yu | 0c63af6 | 2021-09-02 12:59:12 +0800 | [diff] [blame] | 1028 | msg_len ); |
| 1029 | ssl->handshake->update_checksum( ssl, buf, msg_len ); |
Jerry Yu | 92c6b40 | 2021-08-27 16:59:09 +0800 | [diff] [blame] | 1030 | |
Jerry Yu | 2c0fbf3 | 2021-09-02 13:53:46 +0800 | [diff] [blame] | 1031 | MBEDTLS_SSL_PROC_CHK( mbedtls_ssl_tls13_finish_handshake_msg( ssl, |
| 1032 | buf_len, |
| 1033 | msg_len ) ); |
Jerry Yu | 92c6b40 | 2021-08-27 16:59:09 +0800 | [diff] [blame] | 1034 | |
Ronald Cron | 3addfa4 | 2022-02-08 16:10:25 +0100 | [diff] [blame] | 1035 | mbedtls_ssl_handshake_set_state( ssl, MBEDTLS_SSL_SERVER_HELLO ); |
| 1036 | |
Jerry Yu | 92c6b40 | 2021-08-27 16:59:09 +0800 | [diff] [blame] | 1037 | cleanup: |
| 1038 | |
| 1039 | MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= write client hello" ) ); |
| 1040 | return ret; |
Jerry Yu | 65dd2cc | 2021-08-18 16:38:40 +0800 | [diff] [blame] | 1041 | } |
| 1042 | |
Jerry Yu | 687101b | 2021-09-14 16:03:56 +0800 | [diff] [blame] | 1043 | /* |
Jerry Yu | 4a17338 | 2021-10-11 21:45:31 +0800 | [diff] [blame] | 1044 | * Functions for parsing and processing Server Hello |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1045 | */ |
Jerry Yu | 7a186a0 | 2021-10-15 18:46:14 +0800 | [diff] [blame] | 1046 | /* Returns a negative value on failure, and otherwise |
Jerry Yu | b85277e | 2021-10-13 13:36:05 +0800 | [diff] [blame] | 1047 | * - SSL_SERVER_HELLO_COORDINATE_HELLO or |
| 1048 | * - SSL_SERVER_HELLO_COORDINATE_HRR |
XiaokangQian | 51eff22 | 2021-12-10 10:33:56 +0000 | [diff] [blame] | 1049 | * to indicate which message is expected and to be parsed next. |
| 1050 | */ |
Jerry Yu | b85277e | 2021-10-13 13:36:05 +0800 | [diff] [blame] | 1051 | #define SSL_SERVER_HELLO_COORDINATE_HELLO 0 |
| 1052 | #define SSL_SERVER_HELLO_COORDINATE_HRR 1 |
| 1053 | static int ssl_server_hello_is_hrr( mbedtls_ssl_context *ssl, |
| 1054 | const unsigned char *buf, |
| 1055 | const unsigned char *end ) |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1056 | { |
Jerry Yu | e6d7e5c | 2021-10-26 10:44:32 +0800 | [diff] [blame] | 1057 | static const unsigned char magic_hrr_string[MBEDTLS_SERVER_HELLO_RANDOM_LEN] = |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1058 | { 0xCF, 0x21, 0xAD, 0x74, 0xE5, 0x9A, 0x61, 0x11, |
| 1059 | 0xBE, 0x1D, 0x8C, 0x02, 0x1E, 0x65, 0xB8, 0x91, |
| 1060 | 0xC2, 0xA2, 0x11, 0x16, 0x7A, 0xBB, 0x8C, 0x5E, |
| 1061 | 0x07, 0x9E, 0x09, 0xE2, 0xC8, 0xA8, 0x33 ,0x9C }; |
| 1062 | |
| 1063 | /* Check whether this message is a HelloRetryRequest ( HRR ) message. |
| 1064 | * |
Jerry Yu | 4a17338 | 2021-10-11 21:45:31 +0800 | [diff] [blame] | 1065 | * Server Hello and HRR are only distinguished by Random set to the |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1066 | * special value of the SHA-256 of "HelloRetryRequest". |
| 1067 | * |
| 1068 | * struct { |
| 1069 | * ProtocolVersion legacy_version = 0x0303; |
| 1070 | * Random random; |
| 1071 | * opaque legacy_session_id_echo<0..32>; |
| 1072 | * CipherSuite cipher_suite; |
| 1073 | * uint8 legacy_compression_method = 0; |
Jerry Yu | b85277e | 2021-10-13 13:36:05 +0800 | [diff] [blame] | 1074 | * Extension extensions<6..2^16-1>; |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1075 | * } ServerHello; |
| 1076 | * |
| 1077 | */ |
Jerry Yu | b85277e | 2021-10-13 13:36:05 +0800 | [diff] [blame] | 1078 | MBEDTLS_SSL_CHK_BUF_READ_PTR( buf, end, 2 + sizeof( magic_hrr_string ) ); |
Jerry Yu | 4a17338 | 2021-10-11 21:45:31 +0800 | [diff] [blame] | 1079 | |
| 1080 | if( memcmp( buf + 2, magic_hrr_string, sizeof( magic_hrr_string ) ) == 0 ) |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1081 | { |
Jerry Yu | b85277e | 2021-10-13 13:36:05 +0800 | [diff] [blame] | 1082 | return( SSL_SERVER_HELLO_COORDINATE_HRR ); |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1083 | } |
| 1084 | |
Jerry Yu | b85277e | 2021-10-13 13:36:05 +0800 | [diff] [blame] | 1085 | return( SSL_SERVER_HELLO_COORDINATE_HELLO ); |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1086 | } |
| 1087 | |
Jerry Yu | 745bb61 | 2021-10-13 22:01:04 +0800 | [diff] [blame] | 1088 | /* Fetch and preprocess |
| 1089 | * Returns a negative value on failure, and otherwise |
| 1090 | * - SSL_SERVER_HELLO_COORDINATE_HELLO or |
| 1091 | * - SSL_SERVER_HELLO_COORDINATE_HRR |
| 1092 | */ |
Jerry Yu | b85277e | 2021-10-13 13:36:05 +0800 | [diff] [blame] | 1093 | static int ssl_tls13_server_hello_coordinate( mbedtls_ssl_context *ssl, |
| 1094 | unsigned char **buf, |
| 1095 | size_t *buf_len ) |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1096 | { |
Jerry Yu | 4a17338 | 2021-10-11 21:45:31 +0800 | [diff] [blame] | 1097 | int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1098 | |
XiaokangQian | 355e09a | 2022-01-20 11:14:50 +0000 | [diff] [blame] | 1099 | MBEDTLS_SSL_PROC_CHK( mbedtls_ssl_tls13_fetch_handshake_msg( ssl, |
| 1100 | MBEDTLS_SSL_HS_SERVER_HELLO, |
| 1101 | buf, buf_len ) ); |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1102 | |
Jerry Yu | b85277e | 2021-10-13 13:36:05 +0800 | [diff] [blame] | 1103 | ret = ssl_server_hello_is_hrr( ssl, *buf, *buf + *buf_len ); |
| 1104 | switch( ret ) |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1105 | { |
Jerry Yu | 745bb61 | 2021-10-13 22:01:04 +0800 | [diff] [blame] | 1106 | case SSL_SERVER_HELLO_COORDINATE_HELLO: |
| 1107 | MBEDTLS_SSL_DEBUG_MSG( 2, ( "received ServerHello message" ) ); |
| 1108 | break; |
| 1109 | case SSL_SERVER_HELLO_COORDINATE_HRR: |
| 1110 | MBEDTLS_SSL_DEBUG_MSG( 2, ( "received HelloRetryRequest message" ) ); |
XiaokangQian | 16acd4b | 2022-01-14 07:35:47 +0000 | [diff] [blame] | 1111 | /* If a client receives a second |
| 1112 | * HelloRetryRequest in the same connection (i.e., where the ClientHello |
| 1113 | * was itself in response to a HelloRetryRequest), it MUST abort the |
| 1114 | * handshake with an "unexpected_message" alert. |
| 1115 | */ |
XiaokangQian | d9e068e | 2022-01-18 06:23:32 +0000 | [diff] [blame] | 1116 | if( ssl->handshake->hello_retry_request_count > 0 ) |
XiaokangQian | 16acd4b | 2022-01-14 07:35:47 +0000 | [diff] [blame] | 1117 | { |
| 1118 | MBEDTLS_SSL_DEBUG_MSG( 1, ( "Multiple HRRs received" ) ); |
| 1119 | MBEDTLS_SSL_PEND_FATAL_ALERT( MBEDTLS_SSL_ALERT_MSG_UNEXPECTED_MESSAGE, |
| 1120 | MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE ); |
| 1121 | return( MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE ); |
| 1122 | } |
XiaokangQian | 2b01dc3 | 2022-01-21 02:53:13 +0000 | [diff] [blame] | 1123 | /* |
| 1124 | * Clients must abort the handshake with an "illegal_parameter" |
| 1125 | * alert if the HelloRetryRequest would not result in any change |
| 1126 | * in the ClientHello. |
| 1127 | * In a PSK only key exchange that what we expect. |
| 1128 | */ |
| 1129 | if( ! mbedtls_ssl_conf_tls13_some_ephemeral_enabled( ssl ) ) |
| 1130 | { |
| 1131 | MBEDTLS_SSL_DEBUG_MSG( 1, |
| 1132 | ( "Unexpected HRR in pure PSK key exchange." ) ); |
| 1133 | MBEDTLS_SSL_PEND_FATAL_ALERT( |
| 1134 | MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER, |
| 1135 | MBEDTLS_ERR_SSL_ILLEGAL_PARAMETER); |
| 1136 | return( MBEDTLS_ERR_SSL_ILLEGAL_PARAMETER ); |
| 1137 | } |
XiaokangQian | 16acd4b | 2022-01-14 07:35:47 +0000 | [diff] [blame] | 1138 | |
XiaokangQian | d9e068e | 2022-01-18 06:23:32 +0000 | [diff] [blame] | 1139 | ssl->handshake->hello_retry_request_count++; |
XiaokangQian | 16acd4b | 2022-01-14 07:35:47 +0000 | [diff] [blame] | 1140 | |
Jerry Yu | 745bb61 | 2021-10-13 22:01:04 +0800 | [diff] [blame] | 1141 | break; |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1142 | } |
| 1143 | |
| 1144 | cleanup: |
| 1145 | |
| 1146 | return( ret ); |
| 1147 | } |
| 1148 | |
Jerry Yu | 4a17338 | 2021-10-11 21:45:31 +0800 | [diff] [blame] | 1149 | static int ssl_tls13_check_server_hello_session_id_echo( mbedtls_ssl_context *ssl, |
| 1150 | const unsigned char **buf, |
| 1151 | const unsigned char *end ) |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1152 | { |
| 1153 | const unsigned char *p = *buf; |
Jerry Yu | 4a17338 | 2021-10-11 21:45:31 +0800 | [diff] [blame] | 1154 | size_t legacy_session_id_echo_len; |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1155 | |
Jerry Yu | de4fb2c | 2021-09-19 18:05:08 +0800 | [diff] [blame] | 1156 | MBEDTLS_SSL_CHK_BUF_READ_PTR( p, end, 1 ); |
Jerry Yu | 4a17338 | 2021-10-11 21:45:31 +0800 | [diff] [blame] | 1157 | legacy_session_id_echo_len = *p++ ; |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1158 | |
Jerry Yu | 4a17338 | 2021-10-11 21:45:31 +0800 | [diff] [blame] | 1159 | MBEDTLS_SSL_CHK_BUF_READ_PTR( p, end, legacy_session_id_echo_len ); |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1160 | |
| 1161 | /* legacy_session_id_echo */ |
Jerry Yu | 4a17338 | 2021-10-11 21:45:31 +0800 | [diff] [blame] | 1162 | if( ssl->session_negotiate->id_len != legacy_session_id_echo_len || |
| 1163 | memcmp( ssl->session_negotiate->id, p , legacy_session_id_echo_len ) != 0 ) |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1164 | { |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1165 | MBEDTLS_SSL_DEBUG_BUF( 3, "Expected Session ID", |
| 1166 | ssl->session_negotiate->id, |
| 1167 | ssl->session_negotiate->id_len ); |
| 1168 | MBEDTLS_SSL_DEBUG_BUF( 3, "Received Session ID", p, |
Jerry Yu | 4a17338 | 2021-10-11 21:45:31 +0800 | [diff] [blame] | 1169 | legacy_session_id_echo_len ); |
| 1170 | |
| 1171 | MBEDTLS_SSL_PEND_FATAL_ALERT( MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER, |
| 1172 | MBEDTLS_ERR_SSL_ILLEGAL_PARAMETER); |
| 1173 | |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1174 | return( MBEDTLS_ERR_SSL_ILLEGAL_PARAMETER ); |
| 1175 | } |
| 1176 | |
Jerry Yu | 4a17338 | 2021-10-11 21:45:31 +0800 | [diff] [blame] | 1177 | p += legacy_session_id_echo_len; |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1178 | *buf = p; |
| 1179 | |
| 1180 | MBEDTLS_SSL_DEBUG_BUF( 3, "Session ID", ssl->session_negotiate->id, |
Jerry Yu | 4a17338 | 2021-10-11 21:45:31 +0800 | [diff] [blame] | 1181 | ssl->session_negotiate->id_len ); |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1182 | return( 0 ); |
| 1183 | } |
| 1184 | |
Jerry Yu | 4a17338 | 2021-10-11 21:45:31 +0800 | [diff] [blame] | 1185 | static int ssl_tls13_cipher_suite_is_offered( mbedtls_ssl_context *ssl, |
| 1186 | int cipher_suite ) |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1187 | { |
Jerry Yu | 4a17338 | 2021-10-11 21:45:31 +0800 | [diff] [blame] | 1188 | const int *ciphersuite_list = ssl->conf->ciphersuite_list; |
| 1189 | |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1190 | /* Check whether we have offered this ciphersuite */ |
Jerry Yu | 4a17338 | 2021-10-11 21:45:31 +0800 | [diff] [blame] | 1191 | for ( size_t i = 0; ciphersuite_list[i] != 0; i++ ) |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1192 | { |
Jerry Yu | 4a17338 | 2021-10-11 21:45:31 +0800 | [diff] [blame] | 1193 | if( ciphersuite_list[i] == cipher_suite ) |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1194 | { |
| 1195 | return( 1 ); |
| 1196 | } |
| 1197 | } |
| 1198 | return( 0 ); |
| 1199 | } |
| 1200 | |
| 1201 | /* Parse ServerHello message and configure context |
| 1202 | * |
| 1203 | * struct { |
| 1204 | * ProtocolVersion legacy_version = 0x0303; // TLS 1.2 |
| 1205 | * Random random; |
| 1206 | * opaque legacy_session_id_echo<0..32>; |
| 1207 | * CipherSuite cipher_suite; |
| 1208 | * uint8 legacy_compression_method = 0; |
Jerry Yu | b85277e | 2021-10-13 13:36:05 +0800 | [diff] [blame] | 1209 | * Extension extensions<6..2^16-1>; |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1210 | * } ServerHello; |
| 1211 | */ |
Jerry Yu | c068b66 | 2021-10-11 22:30:19 +0800 | [diff] [blame] | 1212 | static int ssl_tls13_parse_server_hello( mbedtls_ssl_context *ssl, |
| 1213 | const unsigned char *buf, |
XiaokangQian | d9e068e | 2022-01-18 06:23:32 +0000 | [diff] [blame] | 1214 | const unsigned char *end, |
| 1215 | int is_hrr ) |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1216 | { |
Jerry Yu | b85277e | 2021-10-13 13:36:05 +0800 | [diff] [blame] | 1217 | int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1218 | const unsigned char *p = buf; |
XiaokangQian | 355e09a | 2022-01-20 11:14:50 +0000 | [diff] [blame] | 1219 | mbedtls_ssl_handshake_params *handshake = ssl->handshake; |
Jerry Yu | b85277e | 2021-10-13 13:36:05 +0800 | [diff] [blame] | 1220 | size_t extensions_len; |
| 1221 | const unsigned char *extensions_end; |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1222 | uint16_t cipher_suite; |
Jerry Yu | de4fb2c | 2021-09-19 18:05:08 +0800 | [diff] [blame] | 1223 | const mbedtls_ssl_ciphersuite_t *ciphersuite_info; |
XiaokangQian | 78b1fa7 | 2022-01-19 06:56:30 +0000 | [diff] [blame] | 1224 | int supported_versions_ext_found = 0; |
XiaokangQian | b119a35 | 2022-01-26 03:29:10 +0000 | [diff] [blame] | 1225 | int fatal_alert = 0; |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1226 | |
| 1227 | /* |
| 1228 | * Check there is space for minimal fields |
| 1229 | * |
| 1230 | * - legacy_version ( 2 bytes) |
Jerry Yu | e6d7e5c | 2021-10-26 10:44:32 +0800 | [diff] [blame] | 1231 | * - random (MBEDTLS_SERVER_HELLO_RANDOM_LEN bytes) |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1232 | * - legacy_session_id_echo ( 1 byte ), minimum size |
| 1233 | * - cipher_suite ( 2 bytes) |
| 1234 | * - legacy_compression_method ( 1 byte ) |
| 1235 | */ |
Jerry Yu | e6d7e5c | 2021-10-26 10:44:32 +0800 | [diff] [blame] | 1236 | MBEDTLS_SSL_CHK_BUF_READ_PTR( p, end, MBEDTLS_SERVER_HELLO_RANDOM_LEN + 6 ); |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1237 | |
| 1238 | MBEDTLS_SSL_DEBUG_BUF( 4, "server hello", p, end - p ); |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1239 | MBEDTLS_SSL_DEBUG_BUF( 3, "server hello, version", p, 2 ); |
| 1240 | |
Jerry Yu | 4a17338 | 2021-10-11 21:45:31 +0800 | [diff] [blame] | 1241 | /* ... |
Jerry Yu | b85277e | 2021-10-13 13:36:05 +0800 | [diff] [blame] | 1242 | * ProtocolVersion legacy_version = 0x0303; // TLS 1.2 |
Jerry Yu | 4a17338 | 2021-10-11 21:45:31 +0800 | [diff] [blame] | 1243 | * ... |
| 1244 | * with ProtocolVersion defined as: |
| 1245 | * uint16 ProtocolVersion; |
| 1246 | */ |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1247 | if( !( p[0] == MBEDTLS_SSL_MAJOR_VERSION_3 && |
| 1248 | p[1] == MBEDTLS_SSL_MINOR_VERSION_3 ) ) |
| 1249 | { |
| 1250 | MBEDTLS_SSL_DEBUG_MSG( 1, ( "Unsupported version of TLS." ) ); |
| 1251 | MBEDTLS_SSL_PEND_FATAL_ALERT( MBEDTLS_SSL_ALERT_MSG_PROTOCOL_VERSION, |
| 1252 | MBEDTLS_ERR_SSL_BAD_PROTOCOL_VERSION ); |
XiaokangQian | d59be77 | 2022-01-24 10:12:51 +0000 | [diff] [blame] | 1253 | ret = MBEDTLS_ERR_SSL_BAD_PROTOCOL_VERSION; |
| 1254 | goto cleanup; |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1255 | } |
| 1256 | p += 2; |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1257 | |
Jerry Yu | e6d7e5c | 2021-10-26 10:44:32 +0800 | [diff] [blame] | 1258 | /* ... |
Jerry Yu | 4a17338 | 2021-10-11 21:45:31 +0800 | [diff] [blame] | 1259 | * Random random; |
| 1260 | * ... |
| 1261 | * with Random defined as: |
Jerry Yu | e6d7e5c | 2021-10-26 10:44:32 +0800 | [diff] [blame] | 1262 | * opaque Random[MBEDTLS_SERVER_HELLO_RANDOM_LEN]; |
Jerry Yu | 4a17338 | 2021-10-11 21:45:31 +0800 | [diff] [blame] | 1263 | */ |
XiaokangQian | 53f20b7 | 2022-01-18 10:47:33 +0000 | [diff] [blame] | 1264 | if( !is_hrr ) |
| 1265 | { |
XiaokangQian | 355e09a | 2022-01-20 11:14:50 +0000 | [diff] [blame] | 1266 | memcpy( &handshake->randbytes[MBEDTLS_CLIENT_HELLO_RANDOM_LEN], p, |
XiaokangQian | 53f20b7 | 2022-01-18 10:47:33 +0000 | [diff] [blame] | 1267 | MBEDTLS_SERVER_HELLO_RANDOM_LEN ); |
| 1268 | MBEDTLS_SSL_DEBUG_BUF( 3, "server hello, random bytes", |
| 1269 | p, MBEDTLS_SERVER_HELLO_RANDOM_LEN ); |
| 1270 | } |
Jerry Yu | e6d7e5c | 2021-10-26 10:44:32 +0800 | [diff] [blame] | 1271 | p += MBEDTLS_SERVER_HELLO_RANDOM_LEN; |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1272 | |
Jerry Yu | 4a17338 | 2021-10-11 21:45:31 +0800 | [diff] [blame] | 1273 | /* ... |
| 1274 | * opaque legacy_session_id_echo<0..32>; |
| 1275 | * ... |
| 1276 | */ |
| 1277 | if( ssl_tls13_check_server_hello_session_id_echo( ssl, &p, end ) != 0 ) |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1278 | { |
XiaokangQian | 52da558 | 2022-01-26 09:49:29 +0000 | [diff] [blame] | 1279 | fatal_alert = MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER; |
XiaokangQian | d59be77 | 2022-01-24 10:12:51 +0000 | [diff] [blame] | 1280 | goto cleanup; |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1281 | } |
| 1282 | |
Jerry Yu | 4a17338 | 2021-10-11 21:45:31 +0800 | [diff] [blame] | 1283 | /* ... |
| 1284 | * CipherSuite cipher_suite; |
| 1285 | * ... |
| 1286 | * with CipherSuite defined as: |
| 1287 | * uint8 CipherSuite[2]; |
| 1288 | */ |
| 1289 | MBEDTLS_SSL_CHK_BUF_READ_PTR( p, end, 2 ); |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1290 | cipher_suite = MBEDTLS_GET_UINT16_BE( p, 0 ); |
| 1291 | p += 2; |
| 1292 | |
Jerry Yu | 4a17338 | 2021-10-11 21:45:31 +0800 | [diff] [blame] | 1293 | |
XiaokangQian | 355e09a | 2022-01-20 11:14:50 +0000 | [diff] [blame] | 1294 | ciphersuite_info = mbedtls_ssl_ciphersuite_from_id( cipher_suite ); |
Jerry Yu | 4a17338 | 2021-10-11 21:45:31 +0800 | [diff] [blame] | 1295 | /* |
| 1296 | * Check whether this ciphersuite is supported and offered. |
| 1297 | * Via the force_ciphersuite version we may have instructed the client |
| 1298 | * to use a different ciphersuite. |
| 1299 | */ |
Jerry Yu | 4a17338 | 2021-10-11 21:45:31 +0800 | [diff] [blame] | 1300 | if( ciphersuite_info == NULL || |
| 1301 | ssl_tls13_cipher_suite_is_offered( ssl, cipher_suite ) == 0 ) |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1302 | { |
XiaokangQian | 52da558 | 2022-01-26 09:49:29 +0000 | [diff] [blame] | 1303 | fatal_alert = MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER; |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1304 | } |
XiaokangQian | 53f20b7 | 2022-01-18 10:47:33 +0000 | [diff] [blame] | 1305 | /* |
XiaokangQian | 355e09a | 2022-01-20 11:14:50 +0000 | [diff] [blame] | 1306 | * If we received an HRR before and that the proposed selected |
| 1307 | * ciphersuite in this server hello is not the same as the one |
| 1308 | * proposed in the HRR, we abort the handshake and send an |
| 1309 | * "illegal_parameter" alert. |
XiaokangQian | 53f20b7 | 2022-01-18 10:47:33 +0000 | [diff] [blame] | 1310 | */ |
XiaokangQian | 355e09a | 2022-01-20 11:14:50 +0000 | [diff] [blame] | 1311 | else if( ( !is_hrr ) && ( handshake->hello_retry_request_count > 0 ) && |
| 1312 | ( cipher_suite != ssl->session_negotiate->ciphersuite ) ) |
XiaokangQian | 53f20b7 | 2022-01-18 10:47:33 +0000 | [diff] [blame] | 1313 | { |
XiaokangQian | 52da558 | 2022-01-26 09:49:29 +0000 | [diff] [blame] | 1314 | fatal_alert = MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER; |
XiaokangQian | 355e09a | 2022-01-20 11:14:50 +0000 | [diff] [blame] | 1315 | } |
XiaokangQian | 53f20b7 | 2022-01-18 10:47:33 +0000 | [diff] [blame] | 1316 | |
XiaokangQian | 52da558 | 2022-01-26 09:49:29 +0000 | [diff] [blame] | 1317 | if( fatal_alert == MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER ) |
XiaokangQian | 355e09a | 2022-01-20 11:14:50 +0000 | [diff] [blame] | 1318 | { |
| 1319 | MBEDTLS_SSL_DEBUG_MSG( 1, ( "invalid ciphersuite(%04x) parameter", |
| 1320 | cipher_suite ) ); |
XiaokangQian | d59be77 | 2022-01-24 10:12:51 +0000 | [diff] [blame] | 1321 | goto cleanup; |
XiaokangQian | 53f20b7 | 2022-01-18 10:47:33 +0000 | [diff] [blame] | 1322 | } |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1323 | |
Jerry Yu | 4a17338 | 2021-10-11 21:45:31 +0800 | [diff] [blame] | 1324 | /* Configure ciphersuites */ |
| 1325 | mbedtls_ssl_optimize_checksum( ssl, ciphersuite_info ); |
| 1326 | |
XiaokangQian | 355e09a | 2022-01-20 11:14:50 +0000 | [diff] [blame] | 1327 | handshake->ciphersuite_info = ciphersuite_info; |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1328 | ssl->session_negotiate->ciphersuite = cipher_suite; |
| 1329 | |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1330 | MBEDTLS_SSL_DEBUG_MSG( 3, ( "server hello, chosen ciphersuite: ( %04x ) - %s", |
| 1331 | cipher_suite, ciphersuite_info->name ) ); |
| 1332 | |
| 1333 | #if defined(MBEDTLS_HAVE_TIME) |
| 1334 | ssl->session_negotiate->start = time( NULL ); |
| 1335 | #endif /* MBEDTLS_HAVE_TIME */ |
| 1336 | |
Jerry Yu | 4a17338 | 2021-10-11 21:45:31 +0800 | [diff] [blame] | 1337 | /* ... |
| 1338 | * uint8 legacy_compression_method = 0; |
| 1339 | * ... |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1340 | */ |
Jerry Yu | de4fb2c | 2021-09-19 18:05:08 +0800 | [diff] [blame] | 1341 | MBEDTLS_SSL_CHK_BUF_READ_PTR( p, end, 1 ); |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1342 | if( p[0] != 0 ) |
| 1343 | { |
Jerry Yu | b85277e | 2021-10-13 13:36:05 +0800 | [diff] [blame] | 1344 | MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad legacy compression method" ) ); |
XiaokangQian | 52da558 | 2022-01-26 09:49:29 +0000 | [diff] [blame] | 1345 | fatal_alert = MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER; |
XiaokangQian | d59be77 | 2022-01-24 10:12:51 +0000 | [diff] [blame] | 1346 | goto cleanup; |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1347 | } |
| 1348 | p++; |
| 1349 | |
Jerry Yu | b85277e | 2021-10-13 13:36:05 +0800 | [diff] [blame] | 1350 | /* ... |
| 1351 | * Extension extensions<6..2^16-1>; |
| 1352 | * ... |
Jerry Yu | 4a17338 | 2021-10-11 21:45:31 +0800 | [diff] [blame] | 1353 | * struct { |
| 1354 | * ExtensionType extension_type; (2 bytes) |
| 1355 | * opaque extension_data<0..2^16-1>; |
| 1356 | * } Extension; |
| 1357 | */ |
Jerry Yu | de4fb2c | 2021-09-19 18:05:08 +0800 | [diff] [blame] | 1358 | MBEDTLS_SSL_CHK_BUF_READ_PTR( p, end, 2 ); |
Jerry Yu | 4a17338 | 2021-10-11 21:45:31 +0800 | [diff] [blame] | 1359 | extensions_len = MBEDTLS_GET_UINT16_BE( p, 0 ); |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1360 | p += 2; |
Jerry Yu | de4fb2c | 2021-09-19 18:05:08 +0800 | [diff] [blame] | 1361 | |
Jerry Yu | 4a17338 | 2021-10-11 21:45:31 +0800 | [diff] [blame] | 1362 | /* Check extensions do not go beyond the buffer of data. */ |
| 1363 | MBEDTLS_SSL_CHK_BUF_READ_PTR( p, end, extensions_len ); |
| 1364 | extensions_end = p + extensions_len; |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1365 | |
Jerry Yu | 4a17338 | 2021-10-11 21:45:31 +0800 | [diff] [blame] | 1366 | MBEDTLS_SSL_DEBUG_BUF( 3, "server hello extensions", p, extensions_len ); |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1367 | |
Jerry Yu | 4a17338 | 2021-10-11 21:45:31 +0800 | [diff] [blame] | 1368 | while( p < extensions_end ) |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1369 | { |
| 1370 | unsigned int extension_type; |
| 1371 | size_t extension_data_len; |
XiaokangQian | 43550bd | 2022-01-21 04:32:58 +0000 | [diff] [blame] | 1372 | const unsigned char *extension_data_end; |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1373 | |
Jerry Yu | 4a17338 | 2021-10-11 21:45:31 +0800 | [diff] [blame] | 1374 | MBEDTLS_SSL_CHK_BUF_READ_PTR( p, extensions_end, 4 ); |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1375 | extension_type = MBEDTLS_GET_UINT16_BE( p, 0 ); |
| 1376 | extension_data_len = MBEDTLS_GET_UINT16_BE( p, 2 ); |
| 1377 | p += 4; |
| 1378 | |
Jerry Yu | 4a17338 | 2021-10-11 21:45:31 +0800 | [diff] [blame] | 1379 | MBEDTLS_SSL_CHK_BUF_READ_PTR( p, extensions_end, extension_data_len ); |
XiaokangQian | 43550bd | 2022-01-21 04:32:58 +0000 | [diff] [blame] | 1380 | extension_data_end = p + extension_data_len; |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1381 | |
| 1382 | switch( extension_type ) |
| 1383 | { |
XiaokangQian | b851da8 | 2022-01-14 04:03:11 +0000 | [diff] [blame] | 1384 | case MBEDTLS_TLS_EXT_COOKIE: |
| 1385 | |
XiaokangQian | d9e068e | 2022-01-18 06:23:32 +0000 | [diff] [blame] | 1386 | if( !is_hrr ) |
| 1387 | { |
XiaokangQian | 52da558 | 2022-01-26 09:49:29 +0000 | [diff] [blame] | 1388 | fatal_alert = MBEDTLS_SSL_ALERT_MSG_UNSUPPORTED_EXT; |
XiaokangQian | d59be77 | 2022-01-24 10:12:51 +0000 | [diff] [blame] | 1389 | goto cleanup; |
XiaokangQian | d9e068e | 2022-01-18 06:23:32 +0000 | [diff] [blame] | 1390 | } |
| 1391 | |
XiaokangQian | 43550bd | 2022-01-21 04:32:58 +0000 | [diff] [blame] | 1392 | ret = ssl_tls13_parse_cookie_ext( ssl, |
| 1393 | p, extension_data_end ); |
| 1394 | if( ret != 0 ) |
XiaokangQian | b851da8 | 2022-01-14 04:03:11 +0000 | [diff] [blame] | 1395 | { |
XiaokangQian | 43550bd | 2022-01-21 04:32:58 +0000 | [diff] [blame] | 1396 | MBEDTLS_SSL_DEBUG_RET( 1, |
| 1397 | "ssl_tls13_parse_cookie_ext", |
| 1398 | ret ); |
XiaokangQian | d59be77 | 2022-01-24 10:12:51 +0000 | [diff] [blame] | 1399 | goto cleanup; |
XiaokangQian | b851da8 | 2022-01-14 04:03:11 +0000 | [diff] [blame] | 1400 | } |
XiaokangQian | b851da8 | 2022-01-14 04:03:11 +0000 | [diff] [blame] | 1401 | break; |
XiaokangQian | b851da8 | 2022-01-14 04:03:11 +0000 | [diff] [blame] | 1402 | |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1403 | case MBEDTLS_TLS_EXT_SUPPORTED_VERSIONS: |
XiaokangQian | 78b1fa7 | 2022-01-19 06:56:30 +0000 | [diff] [blame] | 1404 | supported_versions_ext_found = 1; |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1405 | MBEDTLS_SSL_DEBUG_MSG( 3, |
| 1406 | ( "found supported_versions extension" ) ); |
| 1407 | |
Jerry Yu | c068b66 | 2021-10-11 22:30:19 +0800 | [diff] [blame] | 1408 | ret = ssl_tls13_parse_supported_versions_ext( ssl, |
Jerry Yu | b85277e | 2021-10-13 13:36:05 +0800 | [diff] [blame] | 1409 | p, |
XiaokangQian | 43550bd | 2022-01-21 04:32:58 +0000 | [diff] [blame] | 1410 | extension_data_end ); |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1411 | if( ret != 0 ) |
XiaokangQian | d59be77 | 2022-01-24 10:12:51 +0000 | [diff] [blame] | 1412 | goto cleanup; |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1413 | break; |
| 1414 | |
| 1415 | case MBEDTLS_TLS_EXT_PRE_SHARED_KEY: |
| 1416 | MBEDTLS_SSL_DEBUG_MSG( 3, ( "found pre_shared_key extension." ) ); |
| 1417 | MBEDTLS_SSL_DEBUG_MSG( 3, ( "pre_shared_key:Not supported yet" ) ); |
Jerry Yu | 4a17338 | 2021-10-11 21:45:31 +0800 | [diff] [blame] | 1418 | |
XiaokangQian | 52da558 | 2022-01-26 09:49:29 +0000 | [diff] [blame] | 1419 | fatal_alert = MBEDTLS_SSL_ALERT_MSG_UNSUPPORTED_EXT; |
XiaokangQian | d59be77 | 2022-01-24 10:12:51 +0000 | [diff] [blame] | 1420 | goto cleanup; |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1421 | |
| 1422 | #if defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED) |
| 1423 | case MBEDTLS_TLS_EXT_KEY_SHARE: |
| 1424 | MBEDTLS_SSL_DEBUG_MSG( 3, ( "found key_shares extension" ) ); |
XiaokangQian | d59be77 | 2022-01-24 10:12:51 +0000 | [diff] [blame] | 1425 | if( ! mbedtls_ssl_conf_tls13_some_ephemeral_enabled( ssl ) ) |
| 1426 | { |
XiaokangQian | 52da558 | 2022-01-26 09:49:29 +0000 | [diff] [blame] | 1427 | fatal_alert = MBEDTLS_SSL_ALERT_MSG_UNSUPPORTED_EXT; |
XiaokangQian | d59be77 | 2022-01-24 10:12:51 +0000 | [diff] [blame] | 1428 | goto cleanup; |
| 1429 | } |
| 1430 | |
XiaokangQian | 53f20b7 | 2022-01-18 10:47:33 +0000 | [diff] [blame] | 1431 | if( is_hrr ) |
XiaokangQian | d9e068e | 2022-01-18 06:23:32 +0000 | [diff] [blame] | 1432 | ret = ssl_tls13_parse_hrr_key_share_ext( ssl, |
XiaokangQian | 43550bd | 2022-01-21 04:32:58 +0000 | [diff] [blame] | 1433 | p, extension_data_end ); |
XiaokangQian | 53f20b7 | 2022-01-18 10:47:33 +0000 | [diff] [blame] | 1434 | else |
XiaokangQian | b851da8 | 2022-01-14 04:03:11 +0000 | [diff] [blame] | 1435 | ret = ssl_tls13_parse_key_share_ext( ssl, |
XiaokangQian | 43550bd | 2022-01-21 04:32:58 +0000 | [diff] [blame] | 1436 | p, extension_data_end ); |
XiaokangQian | b851da8 | 2022-01-14 04:03:11 +0000 | [diff] [blame] | 1437 | if( ret != 0 ) |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1438 | { |
| 1439 | MBEDTLS_SSL_DEBUG_RET( 1, |
Jerry Yu | 4a17338 | 2021-10-11 21:45:31 +0800 | [diff] [blame] | 1440 | "ssl_tls13_parse_key_share_ext", |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1441 | ret ); |
XiaokangQian | d59be77 | 2022-01-24 10:12:51 +0000 | [diff] [blame] | 1442 | goto cleanup; |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1443 | } |
| 1444 | break; |
| 1445 | #endif /* MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED */ |
| 1446 | |
| 1447 | default: |
Jerry Yu | 4a17338 | 2021-10-11 21:45:31 +0800 | [diff] [blame] | 1448 | MBEDTLS_SSL_DEBUG_MSG( |
| 1449 | 3, |
| 1450 | ( "unknown extension found: %u ( ignoring )", |
| 1451 | extension_type ) ); |
| 1452 | |
XiaokangQian | 52da558 | 2022-01-26 09:49:29 +0000 | [diff] [blame] | 1453 | fatal_alert = MBEDTLS_SSL_ALERT_MSG_UNSUPPORTED_EXT; |
XiaokangQian | d59be77 | 2022-01-24 10:12:51 +0000 | [diff] [blame] | 1454 | goto cleanup; |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1455 | } |
| 1456 | |
| 1457 | p += extension_data_len; |
| 1458 | } |
| 1459 | |
XiaokangQian | 78b1fa7 | 2022-01-19 06:56:30 +0000 | [diff] [blame] | 1460 | if( !supported_versions_ext_found ) |
XiaokangQian | 53f20b7 | 2022-01-18 10:47:33 +0000 | [diff] [blame] | 1461 | { |
XiaokangQian | 78b1fa7 | 2022-01-19 06:56:30 +0000 | [diff] [blame] | 1462 | MBEDTLS_SSL_DEBUG_MSG( 1, ( "supported_versions not found" ) ); |
XiaokangQian | 52da558 | 2022-01-26 09:49:29 +0000 | [diff] [blame] | 1463 | fatal_alert = MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER; |
XiaokangQian | d59be77 | 2022-01-24 10:12:51 +0000 | [diff] [blame] | 1464 | goto cleanup; |
XiaokangQian | 53f20b7 | 2022-01-18 10:47:33 +0000 | [diff] [blame] | 1465 | } |
| 1466 | |
XiaokangQian | d59be77 | 2022-01-24 10:12:51 +0000 | [diff] [blame] | 1467 | cleanup: |
| 1468 | |
XiaokangQian | 52da558 | 2022-01-26 09:49:29 +0000 | [diff] [blame] | 1469 | if( fatal_alert == MBEDTLS_SSL_ALERT_MSG_UNSUPPORTED_EXT ) |
XiaokangQian | d59be77 | 2022-01-24 10:12:51 +0000 | [diff] [blame] | 1470 | { |
| 1471 | MBEDTLS_SSL_PEND_FATAL_ALERT( MBEDTLS_SSL_ALERT_MSG_UNSUPPORTED_EXT, |
| 1472 | MBEDTLS_ERR_SSL_UNSUPPORTED_EXTENSION ); |
| 1473 | ret = MBEDTLS_ERR_SSL_UNSUPPORTED_EXTENSION; |
| 1474 | } |
XiaokangQian | 52da558 | 2022-01-26 09:49:29 +0000 | [diff] [blame] | 1475 | else if ( fatal_alert == MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER ) |
XiaokangQian | d59be77 | 2022-01-24 10:12:51 +0000 | [diff] [blame] | 1476 | { |
| 1477 | MBEDTLS_SSL_PEND_FATAL_ALERT( MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER, |
| 1478 | MBEDTLS_ERR_SSL_ILLEGAL_PARAMETER ); |
| 1479 | ret = MBEDTLS_ERR_SSL_ILLEGAL_PARAMETER; |
| 1480 | } |
| 1481 | return( ret ); |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1482 | } |
| 1483 | |
XiaokangQian | 355e09a | 2022-01-20 11:14:50 +0000 | [diff] [blame] | 1484 | static int ssl_tls13_postprocess_server_hello( mbedtls_ssl_context *ssl ) |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1485 | { |
Jerry Yu | b85277e | 2021-10-13 13:36:05 +0800 | [diff] [blame] | 1486 | int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
Jerry Yu | 0b17784 | 2021-09-05 19:41:30 +0800 | [diff] [blame] | 1487 | mbedtls_ssl_key_set traffic_keys; |
Jerry Yu | 4a17338 | 2021-10-11 21:45:31 +0800 | [diff] [blame] | 1488 | mbedtls_ssl_transform *transform_handshake = NULL; |
Jerry Yu | b85277e | 2021-10-13 13:36:05 +0800 | [diff] [blame] | 1489 | mbedtls_ssl_handshake_params *handshake = ssl->handshake; |
Jerry Yu | 0b17784 | 2021-09-05 19:41:30 +0800 | [diff] [blame] | 1490 | |
Jerry Yu | b85277e | 2021-10-13 13:36:05 +0800 | [diff] [blame] | 1491 | /* Determine the key exchange mode: |
| 1492 | * 1) If both the pre_shared_key and key_share extensions were received |
| 1493 | * then the key exchange mode is PSK with EPHEMERAL. |
| 1494 | * 2) If only the pre_shared_key extension was received then the key |
| 1495 | * exchange mode is PSK-only. |
| 1496 | * 3) If only the key_share extension was received then the key |
| 1497 | * exchange mode is EPHEMERAL-only. |
Jerry Yu | 0b17784 | 2021-09-05 19:41:30 +0800 | [diff] [blame] | 1498 | */ |
Jerry Yu | b85277e | 2021-10-13 13:36:05 +0800 | [diff] [blame] | 1499 | switch( handshake->extensions_present & |
| 1500 | ( MBEDTLS_SSL_EXT_PRE_SHARED_KEY | MBEDTLS_SSL_EXT_KEY_SHARE ) ) |
Jerry Yu | 0b17784 | 2021-09-05 19:41:30 +0800 | [diff] [blame] | 1501 | { |
Jerry Yu | 745bb61 | 2021-10-13 22:01:04 +0800 | [diff] [blame] | 1502 | /* Only the pre_shared_key extension was received */ |
| 1503 | case MBEDTLS_SSL_EXT_PRE_SHARED_KEY: |
Xiaofei Bai | d25fab6 | 2021-12-02 06:36:27 +0000 | [diff] [blame] | 1504 | handshake->tls13_kex_modes = MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_PSK; |
Jerry Yu | 745bb61 | 2021-10-13 22:01:04 +0800 | [diff] [blame] | 1505 | break; |
Jerry Yu | b85277e | 2021-10-13 13:36:05 +0800 | [diff] [blame] | 1506 | |
Jerry Yu | 745bb61 | 2021-10-13 22:01:04 +0800 | [diff] [blame] | 1507 | /* Only the key_share extension was received */ |
| 1508 | case MBEDTLS_SSL_EXT_KEY_SHARE: |
Xiaofei Bai | d25fab6 | 2021-12-02 06:36:27 +0000 | [diff] [blame] | 1509 | handshake->tls13_kex_modes = MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_EPHEMERAL; |
Jerry Yu | 745bb61 | 2021-10-13 22:01:04 +0800 | [diff] [blame] | 1510 | break; |
Jerry Yu | b85277e | 2021-10-13 13:36:05 +0800 | [diff] [blame] | 1511 | |
Jerry Yu | 745bb61 | 2021-10-13 22:01:04 +0800 | [diff] [blame] | 1512 | /* Both the pre_shared_key and key_share extensions were received */ |
| 1513 | case ( MBEDTLS_SSL_EXT_PRE_SHARED_KEY | MBEDTLS_SSL_EXT_KEY_SHARE ): |
Xiaofei Bai | d25fab6 | 2021-12-02 06:36:27 +0000 | [diff] [blame] | 1514 | handshake->tls13_kex_modes = MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_PSK_EPHEMERAL; |
Jerry Yu | 745bb61 | 2021-10-13 22:01:04 +0800 | [diff] [blame] | 1515 | break; |
Jerry Yu | b85277e | 2021-10-13 13:36:05 +0800 | [diff] [blame] | 1516 | |
Jerry Yu | 745bb61 | 2021-10-13 22:01:04 +0800 | [diff] [blame] | 1517 | /* Neither pre_shared_key nor key_share extension was received */ |
| 1518 | default: |
| 1519 | MBEDTLS_SSL_DEBUG_MSG( 1, ( "Unknown key exchange." ) ); |
| 1520 | ret = MBEDTLS_ERR_SSL_HANDSHAKE_FAILURE; |
| 1521 | goto cleanup; |
Jerry Yu | 0b17784 | 2021-09-05 19:41:30 +0800 | [diff] [blame] | 1522 | } |
| 1523 | |
| 1524 | /* Start the TLS 1.3 key schedule: Set the PSK and derive early secret. |
| 1525 | * |
| 1526 | * TODO: We don't have to do this in case we offered 0-RTT and the |
| 1527 | * server accepted it. In this case, we could skip generating |
| 1528 | * the early secret. */ |
Xiaofei Bai | 746f948 | 2021-11-12 08:53:56 +0000 | [diff] [blame] | 1529 | ret = mbedtls_ssl_tls13_key_schedule_stage_early( ssl ); |
Jerry Yu | 0b17784 | 2021-09-05 19:41:30 +0800 | [diff] [blame] | 1530 | if( ret != 0 ) |
| 1531 | { |
Xiaofei Bai | 746f948 | 2021-11-12 08:53:56 +0000 | [diff] [blame] | 1532 | MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_tls13_key_schedule_stage_early_data", |
Jerry Yu | 0b17784 | 2021-09-05 19:41:30 +0800 | [diff] [blame] | 1533 | ret ); |
Jerry Yu | 4a17338 | 2021-10-11 21:45:31 +0800 | [diff] [blame] | 1534 | goto cleanup; |
Jerry Yu | 0b17784 | 2021-09-05 19:41:30 +0800 | [diff] [blame] | 1535 | } |
| 1536 | |
| 1537 | /* Compute handshake secret */ |
Jerry Yu | f0ac235 | 2021-10-11 17:47:07 +0800 | [diff] [blame] | 1538 | ret = mbedtls_ssl_tls13_key_schedule_stage_handshake( ssl ); |
Jerry Yu | 0b17784 | 2021-09-05 19:41:30 +0800 | [diff] [blame] | 1539 | if( ret != 0 ) |
| 1540 | { |
Xiaofei Bai | 746f948 | 2021-11-12 08:53:56 +0000 | [diff] [blame] | 1541 | MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_tls13_derive_master_secret", ret ); |
Jerry Yu | 4a17338 | 2021-10-11 21:45:31 +0800 | [diff] [blame] | 1542 | goto cleanup; |
Jerry Yu | 0b17784 | 2021-09-05 19:41:30 +0800 | [diff] [blame] | 1543 | } |
| 1544 | |
| 1545 | /* Next evolution in key schedule: Establish handshake secret and |
| 1546 | * key material. */ |
Jerry Yu | c068b66 | 2021-10-11 22:30:19 +0800 | [diff] [blame] | 1547 | ret = mbedtls_ssl_tls13_generate_handshake_keys( ssl, &traffic_keys ); |
Jerry Yu | 0b17784 | 2021-09-05 19:41:30 +0800 | [diff] [blame] | 1548 | if( ret != 0 ) |
| 1549 | { |
Jerry Yu | c068b66 | 2021-10-11 22:30:19 +0800 | [diff] [blame] | 1550 | MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_tls13_generate_handshake_keys", |
| 1551 | ret ); |
Jerry Yu | 4a17338 | 2021-10-11 21:45:31 +0800 | [diff] [blame] | 1552 | goto cleanup; |
Jerry Yu | 0b17784 | 2021-09-05 19:41:30 +0800 | [diff] [blame] | 1553 | } |
| 1554 | |
Jerry Yu | b85277e | 2021-10-13 13:36:05 +0800 | [diff] [blame] | 1555 | transform_handshake = mbedtls_calloc( 1, sizeof( mbedtls_ssl_transform ) ); |
Jerry Yu | 0b17784 | 2021-09-05 19:41:30 +0800 | [diff] [blame] | 1556 | if( transform_handshake == NULL ) |
Jerry Yu | 4a17338 | 2021-10-11 21:45:31 +0800 | [diff] [blame] | 1557 | { |
| 1558 | ret = MBEDTLS_ERR_SSL_ALLOC_FAILED; |
| 1559 | goto cleanup; |
| 1560 | } |
Jerry Yu | 0b17784 | 2021-09-05 19:41:30 +0800 | [diff] [blame] | 1561 | |
| 1562 | ret = mbedtls_ssl_tls13_populate_transform( transform_handshake, |
| 1563 | ssl->conf->endpoint, |
| 1564 | ssl->session_negotiate->ciphersuite, |
| 1565 | &traffic_keys, |
| 1566 | ssl ); |
| 1567 | if( ret != 0 ) |
| 1568 | { |
| 1569 | MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_tls13_populate_transform", ret ); |
Jerry Yu | 4a17338 | 2021-10-11 21:45:31 +0800 | [diff] [blame] | 1570 | goto cleanup; |
Jerry Yu | 0b17784 | 2021-09-05 19:41:30 +0800 | [diff] [blame] | 1571 | } |
| 1572 | |
Jerry Yu | b85277e | 2021-10-13 13:36:05 +0800 | [diff] [blame] | 1573 | handshake->transform_handshake = transform_handshake; |
| 1574 | mbedtls_ssl_set_inbound_transform( ssl, transform_handshake ); |
Jerry Yu | 0b17784 | 2021-09-05 19:41:30 +0800 | [diff] [blame] | 1575 | |
| 1576 | MBEDTLS_SSL_DEBUG_MSG( 1, ( "Switch to handshake keys for inbound traffic" ) ); |
| 1577 | ssl->session_in = ssl->session_negotiate; |
| 1578 | |
| 1579 | /* |
| 1580 | * State machine update |
| 1581 | */ |
| 1582 | mbedtls_ssl_handshake_set_state( ssl, MBEDTLS_SSL_ENCRYPTED_EXTENSIONS ); |
| 1583 | |
Jerry Yu | 4a17338 | 2021-10-11 21:45:31 +0800 | [diff] [blame] | 1584 | cleanup: |
| 1585 | |
Jerry Yu | 0b17784 | 2021-09-05 19:41:30 +0800 | [diff] [blame] | 1586 | mbedtls_platform_zeroize( &traffic_keys, sizeof( traffic_keys ) ); |
Jerry Yu | 4a17338 | 2021-10-11 21:45:31 +0800 | [diff] [blame] | 1587 | if( ret != 0 ) |
| 1588 | { |
Jerry Yu | b85277e | 2021-10-13 13:36:05 +0800 | [diff] [blame] | 1589 | mbedtls_free( transform_handshake ); |
Jerry Yu | c068b66 | 2021-10-11 22:30:19 +0800 | [diff] [blame] | 1590 | |
Jerry Yu | 4a17338 | 2021-10-11 21:45:31 +0800 | [diff] [blame] | 1591 | MBEDTLS_SSL_PEND_FATAL_ALERT( |
| 1592 | MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE, |
| 1593 | MBEDTLS_ERR_SSL_HANDSHAKE_FAILURE ); |
| 1594 | } |
| 1595 | return( ret ); |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1596 | } |
| 1597 | |
XiaokangQian | 355e09a | 2022-01-20 11:14:50 +0000 | [diff] [blame] | 1598 | static int ssl_tls13_postprocess_hrr( mbedtls_ssl_context *ssl ) |
XiaokangQian | 647719a | 2021-12-07 09:16:29 +0000 | [diff] [blame] | 1599 | { |
XiaokangQian | 0b56a8f | 2021-12-22 02:39:32 +0000 | [diff] [blame] | 1600 | #if defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED) |
XiaokangQian | 647719a | 2021-12-07 09:16:29 +0000 | [diff] [blame] | 1601 | int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
| 1602 | |
XiaokangQian | 647719a | 2021-12-07 09:16:29 +0000 | [diff] [blame] | 1603 | #if defined(MBEDTLS_SSL_TLS1_3_COMPATIBILITY_MODE) |
| 1604 | /* If not offering early data, the client sends a dummy CCS record |
| 1605 | * immediately before its second flight. This may either be before |
XiaokangQian | 51eff22 | 2021-12-10 10:33:56 +0000 | [diff] [blame] | 1606 | * its second ClientHello or before its encrypted handshake flight. |
| 1607 | */ |
XiaokangQian | 647719a | 2021-12-07 09:16:29 +0000 | [diff] [blame] | 1608 | mbedtls_ssl_handshake_set_state( ssl, |
| 1609 | MBEDTLS_SSL_CLIENT_CCS_BEFORE_2ND_CLIENT_HELLO ); |
| 1610 | #else |
| 1611 | mbedtls_ssl_handshake_set_state( ssl, MBEDTLS_SSL_CLIENT_HELLO ); |
| 1612 | #endif /* MBEDTLS_SSL_TLS1_3_COMPATIBILITY_MODE */ |
| 1613 | |
XiaokangQian | 78b1fa7 | 2022-01-19 06:56:30 +0000 | [diff] [blame] | 1614 | mbedtls_ssl_session_reset_msg_layer( ssl, 0 ); |
XiaokangQian | 647719a | 2021-12-07 09:16:29 +0000 | [diff] [blame] | 1615 | |
XiaokangQian | 78b1fa7 | 2022-01-19 06:56:30 +0000 | [diff] [blame] | 1616 | /* |
XiaokangQian | 355e09a | 2022-01-20 11:14:50 +0000 | [diff] [blame] | 1617 | * We are going to re-generate a shared secret corresponding to the group |
| 1618 | * selected by the server, which is different from the group for which we |
| 1619 | * generated a shared secret in the first client hello. |
| 1620 | * Thus, reset the shared secret. |
XiaokangQian | 51eff22 | 2021-12-10 10:33:56 +0000 | [diff] [blame] | 1621 | */ |
XiaokangQian | 16acd4b | 2022-01-14 07:35:47 +0000 | [diff] [blame] | 1622 | ret = ssl_tls13_reset_key_share( ssl ); |
XiaokangQian | 647719a | 2021-12-07 09:16:29 +0000 | [diff] [blame] | 1623 | if( ret != 0 ) |
| 1624 | return( ret ); |
XiaokangQian | 43550bd | 2022-01-21 04:32:58 +0000 | [diff] [blame] | 1625 | #else |
| 1626 | ((void) ssl); |
XiaokangQian | 0b56a8f | 2021-12-22 02:39:32 +0000 | [diff] [blame] | 1627 | #endif /* MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED */ |
XiaokangQian | 647719a | 2021-12-07 09:16:29 +0000 | [diff] [blame] | 1628 | |
| 1629 | return( 0 ); |
| 1630 | } |
| 1631 | |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1632 | /* |
Jerry Yu | 4a17338 | 2021-10-11 21:45:31 +0800 | [diff] [blame] | 1633 | * Wait and parse ServerHello handshake message. |
Jerry Yu | 687101b | 2021-09-14 16:03:56 +0800 | [diff] [blame] | 1634 | * Handler for MBEDTLS_SSL_SERVER_HELLO |
| 1635 | */ |
Xiaofei Bai | 746f948 | 2021-11-12 08:53:56 +0000 | [diff] [blame] | 1636 | static int ssl_tls13_process_server_hello( mbedtls_ssl_context *ssl ) |
Jerry Yu | 687101b | 2021-09-14 16:03:56 +0800 | [diff] [blame] | 1637 | { |
Jerry Yu | 4a17338 | 2021-10-11 21:45:31 +0800 | [diff] [blame] | 1638 | int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
XiaokangQian | 647719a | 2021-12-07 09:16:29 +0000 | [diff] [blame] | 1639 | unsigned char *buf = NULL; |
| 1640 | size_t buf_len = 0; |
XiaokangQian | 78b1fa7 | 2022-01-19 06:56:30 +0000 | [diff] [blame] | 1641 | int is_hrr = 0; |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1642 | |
| 1643 | MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> %s", __func__ ) ); |
| 1644 | |
| 1645 | /* Coordination step |
| 1646 | * - Fetch record |
| 1647 | * - Make sure it's either a ServerHello or a HRR. |
| 1648 | * - Switch processing routine in case of HRR |
| 1649 | */ |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1650 | ssl->major_ver = MBEDTLS_SSL_MAJOR_VERSION_3; |
| 1651 | ssl->handshake->extensions_present = MBEDTLS_SSL_EXT_NONE; |
| 1652 | |
XiaokangQian | 16acd4b | 2022-01-14 07:35:47 +0000 | [diff] [blame] | 1653 | ret = ssl_tls13_server_hello_coordinate( ssl, &buf, &buf_len ); |
XiaokangQian | d9e068e | 2022-01-18 06:23:32 +0000 | [diff] [blame] | 1654 | if( ret < 0 ) |
XiaokangQian | 16acd4b | 2022-01-14 07:35:47 +0000 | [diff] [blame] | 1655 | goto cleanup; |
| 1656 | else |
XiaokangQian | d9e068e | 2022-01-18 06:23:32 +0000 | [diff] [blame] | 1657 | is_hrr = ( ret == SSL_SERVER_HELLO_COORDINATE_HRR ); |
XiaokangQian | d59be77 | 2022-01-24 10:12:51 +0000 | [diff] [blame] | 1658 | |
XiaokangQian | b851da8 | 2022-01-14 04:03:11 +0000 | [diff] [blame] | 1659 | MBEDTLS_SSL_PROC_CHK( ssl_tls13_parse_server_hello( ssl, buf, |
XiaokangQian | d9e068e | 2022-01-18 06:23:32 +0000 | [diff] [blame] | 1660 | buf + buf_len, |
| 1661 | is_hrr ) ); |
| 1662 | if( is_hrr ) |
XiaokangQian | 647719a | 2021-12-07 09:16:29 +0000 | [diff] [blame] | 1663 | MBEDTLS_SSL_PROC_CHK( mbedtls_ssl_reset_transcript_for_hrr( ssl ) ); |
| 1664 | |
XiaokangQian | b851da8 | 2022-01-14 04:03:11 +0000 | [diff] [blame] | 1665 | mbedtls_ssl_tls13_add_hs_msg_to_checksum( ssl, |
| 1666 | MBEDTLS_SSL_HS_SERVER_HELLO, |
| 1667 | buf, buf_len ); |
XiaokangQian | 647719a | 2021-12-07 09:16:29 +0000 | [diff] [blame] | 1668 | |
XiaokangQian | d9e068e | 2022-01-18 06:23:32 +0000 | [diff] [blame] | 1669 | if( is_hrr ) |
XiaokangQian | 355e09a | 2022-01-20 11:14:50 +0000 | [diff] [blame] | 1670 | MBEDTLS_SSL_PROC_CHK( ssl_tls13_postprocess_hrr( ssl ) ); |
XiaokangQian | d9e068e | 2022-01-18 06:23:32 +0000 | [diff] [blame] | 1671 | else |
XiaokangQian | 355e09a | 2022-01-20 11:14:50 +0000 | [diff] [blame] | 1672 | MBEDTLS_SSL_PROC_CHK( ssl_tls13_postprocess_server_hello( ssl ) ); |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1673 | |
| 1674 | cleanup: |
XiaokangQian | a909061 | 2022-01-27 03:48:27 +0000 | [diff] [blame] | 1675 | MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= %s ( %s )", __func__, |
| 1676 | is_hrr?"HelloRetryRequest":"ServerHello" ) ); |
Jerry Yu | e1b9c29 | 2021-09-10 10:08:31 +0800 | [diff] [blame] | 1677 | return( ret ); |
Jerry Yu | 687101b | 2021-09-14 16:03:56 +0800 | [diff] [blame] | 1678 | } |
| 1679 | |
| 1680 | /* |
XiaokangQian | 2d5c72b | 2021-09-13 07:30:09 +0000 | [diff] [blame] | 1681 | * |
| 1682 | * EncryptedExtensions message |
| 1683 | * |
| 1684 | * The EncryptedExtensions message contains any extensions which |
| 1685 | * should be protected, i.e., any which are not needed to establish |
| 1686 | * the cryptographic context. |
Jerry Yu | 687101b | 2021-09-14 16:03:56 +0800 | [diff] [blame] | 1687 | */ |
XiaokangQian | 2d5c72b | 2021-09-13 07:30:09 +0000 | [diff] [blame] | 1688 | |
| 1689 | /* |
| 1690 | * Overview |
| 1691 | */ |
XiaokangQian | 2d5c72b | 2021-09-13 07:30:09 +0000 | [diff] [blame] | 1692 | |
| 1693 | /* Main entry point; orchestrates the other functions */ |
XiaokangQian | 97799ac | 2021-10-11 10:05:54 +0000 | [diff] [blame] | 1694 | static int ssl_tls13_process_encrypted_extensions( mbedtls_ssl_context *ssl ); |
XiaokangQian | 2d5c72b | 2021-09-13 07:30:09 +0000 | [diff] [blame] | 1695 | |
XiaokangQian | 97799ac | 2021-10-11 10:05:54 +0000 | [diff] [blame] | 1696 | static int ssl_tls13_parse_encrypted_extensions( mbedtls_ssl_context *ssl, |
| 1697 | const unsigned char *buf, |
| 1698 | const unsigned char *end ); |
| 1699 | static int ssl_tls13_postprocess_encrypted_extensions( mbedtls_ssl_context *ssl ); |
XiaokangQian | 2d5c72b | 2021-09-13 07:30:09 +0000 | [diff] [blame] | 1700 | |
| 1701 | /* |
XiaokangQian | c1fe000 | 2021-09-16 03:02:14 +0000 | [diff] [blame] | 1702 | * Handler for MBEDTLS_SSL_ENCRYPTED_EXTENSIONS |
XiaokangQian | 2d5c72b | 2021-09-13 07:30:09 +0000 | [diff] [blame] | 1703 | */ |
XiaokangQian | 97799ac | 2021-10-11 10:05:54 +0000 | [diff] [blame] | 1704 | static int ssl_tls13_process_encrypted_extensions( mbedtls_ssl_context *ssl ) |
Jerry Yu | 687101b | 2021-09-14 16:03:56 +0800 | [diff] [blame] | 1705 | { |
XiaokangQian | 2d5c72b | 2021-09-13 07:30:09 +0000 | [diff] [blame] | 1706 | int ret; |
| 1707 | unsigned char *buf; |
| 1708 | size_t buf_len; |
| 1709 | |
| 1710 | MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> parse encrypted extensions" ) ); |
| 1711 | |
Xiaofei Bai | 746f948 | 2021-11-12 08:53:56 +0000 | [diff] [blame] | 1712 | MBEDTLS_SSL_PROC_CHK( mbedtls_ssl_tls13_fetch_handshake_msg( ssl, |
XiaokangQian | ab7f50d | 2021-10-21 06:23:29 +0000 | [diff] [blame] | 1713 | MBEDTLS_SSL_HS_ENCRYPTED_EXTENSIONS, |
XiaokangQian | 2d5c72b | 2021-09-13 07:30:09 +0000 | [diff] [blame] | 1714 | &buf, &buf_len ) ); |
| 1715 | |
| 1716 | /* Process the message contents */ |
XiaokangQian | 97799ac | 2021-10-11 10:05:54 +0000 | [diff] [blame] | 1717 | MBEDTLS_SSL_PROC_CHK( |
XiaokangQian | 8db25ff | 2021-10-13 05:56:18 +0000 | [diff] [blame] | 1718 | ssl_tls13_parse_encrypted_extensions( ssl, buf, buf + buf_len ) ); |
XiaokangQian | 2d5c72b | 2021-09-13 07:30:09 +0000 | [diff] [blame] | 1719 | |
Xiaofei Bai | 746f948 | 2021-11-12 08:53:56 +0000 | [diff] [blame] | 1720 | mbedtls_ssl_tls13_add_hs_msg_to_checksum( |
XiaokangQian | ab7f50d | 2021-10-21 06:23:29 +0000 | [diff] [blame] | 1721 | ssl, MBEDTLS_SSL_HS_ENCRYPTED_EXTENSIONS, buf, buf_len ); |
XiaokangQian | 2d5c72b | 2021-09-13 07:30:09 +0000 | [diff] [blame] | 1722 | |
XiaokangQian | 97799ac | 2021-10-11 10:05:54 +0000 | [diff] [blame] | 1723 | MBEDTLS_SSL_PROC_CHK( ssl_tls13_postprocess_encrypted_extensions( ssl ) ); |
XiaokangQian | 2d5c72b | 2021-09-13 07:30:09 +0000 | [diff] [blame] | 1724 | |
| 1725 | cleanup: |
| 1726 | |
| 1727 | MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= parse encrypted extensions" ) ); |
| 1728 | return( ret ); |
| 1729 | |
| 1730 | } |
| 1731 | |
XiaokangQian | 08da26c | 2021-10-09 10:12:11 +0000 | [diff] [blame] | 1732 | /* Parse EncryptedExtensions message |
| 1733 | * struct { |
XiaokangQian | 97799ac | 2021-10-11 10:05:54 +0000 | [diff] [blame] | 1734 | * Extension extensions<0..2^16-1>; |
XiaokangQian | 08da26c | 2021-10-09 10:12:11 +0000 | [diff] [blame] | 1735 | * } EncryptedExtensions; |
| 1736 | */ |
XiaokangQian | 97799ac | 2021-10-11 10:05:54 +0000 | [diff] [blame] | 1737 | static int ssl_tls13_parse_encrypted_extensions( mbedtls_ssl_context *ssl, |
| 1738 | const unsigned char *buf, |
| 1739 | const unsigned char *end ) |
XiaokangQian | 2d5c72b | 2021-09-13 07:30:09 +0000 | [diff] [blame] | 1740 | { |
| 1741 | int ret = 0; |
XiaokangQian | 08da26c | 2021-10-09 10:12:11 +0000 | [diff] [blame] | 1742 | size_t extensions_len; |
XiaokangQian | 140f045 | 2021-10-08 08:05:53 +0000 | [diff] [blame] | 1743 | const unsigned char *p = buf; |
XiaokangQian | 8db25ff | 2021-10-13 05:56:18 +0000 | [diff] [blame] | 1744 | const unsigned char *extensions_end; |
XiaokangQian | 2d5c72b | 2021-09-13 07:30:09 +0000 | [diff] [blame] | 1745 | |
XiaokangQian | 08da26c | 2021-10-09 10:12:11 +0000 | [diff] [blame] | 1746 | MBEDTLS_SSL_CHK_BUF_READ_PTR( p, end, 2 ); |
XiaokangQian | 97799ac | 2021-10-11 10:05:54 +0000 | [diff] [blame] | 1747 | extensions_len = MBEDTLS_GET_UINT16_BE( p, 0 ); |
XiaokangQian | 08da26c | 2021-10-09 10:12:11 +0000 | [diff] [blame] | 1748 | p += 2; |
XiaokangQian | 2d5c72b | 2021-09-13 07:30:09 +0000 | [diff] [blame] | 1749 | |
XiaokangQian | 97799ac | 2021-10-11 10:05:54 +0000 | [diff] [blame] | 1750 | MBEDTLS_SSL_DEBUG_BUF( 3, "encrypted extensions", p, extensions_len ); |
XiaokangQian | 8db25ff | 2021-10-13 05:56:18 +0000 | [diff] [blame] | 1751 | extensions_end = p + extensions_len; |
| 1752 | MBEDTLS_SSL_CHK_BUF_READ_PTR( p, end, extensions_len ); |
XiaokangQian | 2d5c72b | 2021-09-13 07:30:09 +0000 | [diff] [blame] | 1753 | |
XiaokangQian | 8db25ff | 2021-10-13 05:56:18 +0000 | [diff] [blame] | 1754 | while( p < extensions_end ) |
XiaokangQian | 2d5c72b | 2021-09-13 07:30:09 +0000 | [diff] [blame] | 1755 | { |
XiaokangQian | 08da26c | 2021-10-09 10:12:11 +0000 | [diff] [blame] | 1756 | unsigned int extension_type; |
| 1757 | size_t extension_data_len; |
XiaokangQian | 2d5c72b | 2021-09-13 07:30:09 +0000 | [diff] [blame] | 1758 | |
XiaokangQian | 08da26c | 2021-10-09 10:12:11 +0000 | [diff] [blame] | 1759 | /* |
| 1760 | * struct { |
XiaokangQian | 97799ac | 2021-10-11 10:05:54 +0000 | [diff] [blame] | 1761 | * ExtensionType extension_type; (2 bytes) |
| 1762 | * opaque extension_data<0..2^16-1>; |
XiaokangQian | 08da26c | 2021-10-09 10:12:11 +0000 | [diff] [blame] | 1763 | * } Extension; |
| 1764 | */ |
XiaokangQian | 8db25ff | 2021-10-13 05:56:18 +0000 | [diff] [blame] | 1765 | MBEDTLS_SSL_CHK_BUF_READ_PTR( p, extensions_end, 4 ); |
XiaokangQian | 08da26c | 2021-10-09 10:12:11 +0000 | [diff] [blame] | 1766 | extension_type = MBEDTLS_GET_UINT16_BE( p, 0 ); |
| 1767 | extension_data_len = MBEDTLS_GET_UINT16_BE( p, 2 ); |
| 1768 | p += 4; |
| 1769 | |
XiaokangQian | 8db25ff | 2021-10-13 05:56:18 +0000 | [diff] [blame] | 1770 | MBEDTLS_SSL_CHK_BUF_READ_PTR( p, extensions_end, extension_data_len ); |
XiaokangQian | 2d5c72b | 2021-09-13 07:30:09 +0000 | [diff] [blame] | 1771 | |
XiaokangQian | 97799ac | 2021-10-11 10:05:54 +0000 | [diff] [blame] | 1772 | /* The client MUST check EncryptedExtensions for the |
XiaokangQian | 2d5c72b | 2021-09-13 07:30:09 +0000 | [diff] [blame] | 1773 | * presence of any forbidden extensions and if any are found MUST abort |
XiaokangQian | 08da26c | 2021-10-09 10:12:11 +0000 | [diff] [blame] | 1774 | * the handshake with an "unsupported_extension" alert. |
XiaokangQian | 2d5c72b | 2021-09-13 07:30:09 +0000 | [diff] [blame] | 1775 | */ |
XiaokangQian | 08da26c | 2021-10-09 10:12:11 +0000 | [diff] [blame] | 1776 | switch( extension_type ) |
| 1777 | { |
XiaokangQian | 2d5c72b | 2021-09-13 07:30:09 +0000 | [diff] [blame] | 1778 | |
XiaokangQian | 08da26c | 2021-10-09 10:12:11 +0000 | [diff] [blame] | 1779 | case MBEDTLS_TLS_EXT_SUPPORTED_GROUPS: |
| 1780 | MBEDTLS_SSL_DEBUG_MSG( 3, ( "found extensions supported groups" ) ); |
| 1781 | break; |
XiaokangQian | 2d5c72b | 2021-09-13 07:30:09 +0000 | [diff] [blame] | 1782 | |
lhuang04 | 86cacac | 2022-01-21 07:34:27 -0800 | [diff] [blame] | 1783 | #if defined(MBEDTLS_SSL_ALPN) |
| 1784 | case MBEDTLS_TLS_EXT_ALPN: |
| 1785 | MBEDTLS_SSL_DEBUG_MSG( 3, ( "found alpn extension" ) ); |
| 1786 | |
| 1787 | if( ( ret = ssl_tls13_parse_alpn_ext( ssl, p, (size_t)extension_data_len ) ) != 0 ) |
| 1788 | { |
| 1789 | return( ret ); |
| 1790 | } |
| 1791 | |
| 1792 | break; |
| 1793 | #endif /* MBEDTLS_SSL_ALPN */ |
XiaokangQian | 08da26c | 2021-10-09 10:12:11 +0000 | [diff] [blame] | 1794 | default: |
XiaokangQian | 97799ac | 2021-10-11 10:05:54 +0000 | [diff] [blame] | 1795 | MBEDTLS_SSL_DEBUG_MSG( |
| 1796 | 3, ( "unsupported extension found: %u ", extension_type) ); |
| 1797 | MBEDTLS_SSL_PEND_FATAL_ALERT( |
Jerry Yu | 7aa7186 | 2021-10-28 21:41:30 +0800 | [diff] [blame] | 1798 | MBEDTLS_SSL_ALERT_MSG_UNSUPPORTED_EXT, |
XiaokangQian | 97799ac | 2021-10-11 10:05:54 +0000 | [diff] [blame] | 1799 | MBEDTLS_ERR_SSL_UNSUPPORTED_EXTENSION ); |
| 1800 | return ( MBEDTLS_ERR_SSL_UNSUPPORTED_EXTENSION ); |
XiaokangQian | 08da26c | 2021-10-09 10:12:11 +0000 | [diff] [blame] | 1801 | } |
| 1802 | |
XiaokangQian | 08da26c | 2021-10-09 10:12:11 +0000 | [diff] [blame] | 1803 | p += extension_data_len; |
XiaokangQian | 97799ac | 2021-10-11 10:05:54 +0000 | [diff] [blame] | 1804 | } |
XiaokangQian | 08da26c | 2021-10-09 10:12:11 +0000 | [diff] [blame] | 1805 | |
XiaokangQian | 97799ac | 2021-10-11 10:05:54 +0000 | [diff] [blame] | 1806 | /* Check that we consumed all the message. */ |
XiaokangQian | 7b2d4ef | 2021-10-13 10:19:02 +0000 | [diff] [blame] | 1807 | if( p != end ) |
XiaokangQian | 97799ac | 2021-10-11 10:05:54 +0000 | [diff] [blame] | 1808 | { |
| 1809 | MBEDTLS_SSL_DEBUG_MSG( 1, ( "EncryptedExtension lengths misaligned" ) ); |
Jerry Yu | 7aa7186 | 2021-10-28 21:41:30 +0800 | [diff] [blame] | 1810 | MBEDTLS_SSL_PEND_FATAL_ALERT( MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR, |
XiaokangQian | 7b2d4ef | 2021-10-13 10:19:02 +0000 | [diff] [blame] | 1811 | MBEDTLS_ERR_SSL_DECODE_ERROR ); |
XiaokangQian | 97799ac | 2021-10-11 10:05:54 +0000 | [diff] [blame] | 1812 | return( MBEDTLS_ERR_SSL_DECODE_ERROR ); |
XiaokangQian | 2d5c72b | 2021-09-13 07:30:09 +0000 | [diff] [blame] | 1813 | } |
| 1814 | |
| 1815 | return( ret ); |
| 1816 | } |
| 1817 | |
XiaokangQian | 97799ac | 2021-10-11 10:05:54 +0000 | [diff] [blame] | 1818 | static int ssl_tls13_postprocess_encrypted_extensions( mbedtls_ssl_context *ssl ) |
XiaokangQian | 2d5c72b | 2021-09-13 07:30:09 +0000 | [diff] [blame] | 1819 | { |
Jerry Yu | a93ac11 | 2021-10-27 16:31:48 +0800 | [diff] [blame] | 1820 | #if defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED) |
Xiaofei Bai | 746f948 | 2021-11-12 08:53:56 +0000 | [diff] [blame] | 1821 | if( mbedtls_ssl_tls13_some_psk_enabled( ssl ) ) |
Jerry Yu | a93ac11 | 2021-10-27 16:31:48 +0800 | [diff] [blame] | 1822 | mbedtls_ssl_handshake_set_state( ssl, MBEDTLS_SSL_SERVER_FINISHED ); |
| 1823 | else |
Jerry Yu | d267431 | 2021-10-29 10:08:19 +0800 | [diff] [blame] | 1824 | mbedtls_ssl_handshake_set_state( ssl, MBEDTLS_SSL_CERTIFICATE_REQUEST ); |
Jerry Yu | a93ac11 | 2021-10-27 16:31:48 +0800 | [diff] [blame] | 1825 | #else |
| 1826 | ((void) ssl); |
| 1827 | mbedtls_ssl_handshake_set_state( ssl, MBEDTLS_SSL_SERVER_FINISHED ); |
| 1828 | #endif |
Jerry Yu | 687101b | 2021-09-14 16:03:56 +0800 | [diff] [blame] | 1829 | return( 0 ); |
| 1830 | } |
| 1831 | |
Jerry Yu | a93ac11 | 2021-10-27 16:31:48 +0800 | [diff] [blame] | 1832 | #if defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED) |
Jerry Yu | 687101b | 2021-09-14 16:03:56 +0800 | [diff] [blame] | 1833 | /* |
Xiaofei Bai | a0ab777 | 2022-01-16 12:14:45 +0000 | [diff] [blame] | 1834 | * |
| 1835 | * STATE HANDLING: CertificateRequest |
| 1836 | * |
Jerry Yu | d267431 | 2021-10-29 10:08:19 +0800 | [diff] [blame] | 1837 | */ |
Xiaofei Bai | 69fcd39 | 2022-01-20 08:25:00 +0000 | [diff] [blame] | 1838 | #define SSL_CERTIFICATE_REQUEST_EXPECT_REQUEST 0 |
| 1839 | #define SSL_CERTIFICATE_REQUEST_SKIP 1 |
Xiaofei Bai | a0ab777 | 2022-01-16 12:14:45 +0000 | [diff] [blame] | 1840 | /* Coordination: |
| 1841 | * Deals with the ambiguity of not knowing if a CertificateRequest |
| 1842 | * will be sent. Returns a negative code on failure, or |
| 1843 | * - SSL_CERTIFICATE_REQUEST_EXPECT_REQUEST |
| 1844 | * - SSL_CERTIFICATE_REQUEST_SKIP |
| 1845 | * indicating if a Certificate Request is expected or not. |
| 1846 | */ |
Xiaofei Bai | a0ab777 | 2022-01-16 12:14:45 +0000 | [diff] [blame] | 1847 | static int ssl_tls13_certificate_request_coordinate( mbedtls_ssl_context *ssl ) |
Jerry Yu | d267431 | 2021-10-29 10:08:19 +0800 | [diff] [blame] | 1848 | { |
Xiaofei Bai | de3f13e | 2022-01-18 05:47:05 +0000 | [diff] [blame] | 1849 | int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
Jerry Yu | d267431 | 2021-10-29 10:08:19 +0800 | [diff] [blame] | 1850 | |
Xiaofei Bai | 7c8b6a9 | 2022-02-08 15:21:13 +0000 | [diff] [blame] | 1851 | if( mbedtls_ssl_tls13_some_psk_enabled( ssl ) ) |
Xiaofei Bai | a0ab777 | 2022-01-16 12:14:45 +0000 | [diff] [blame] | 1852 | { |
| 1853 | MBEDTLS_SSL_DEBUG_MSG( 3, ( "<= skip parse certificate request" ) ); |
| 1854 | return( SSL_CERTIFICATE_REQUEST_SKIP ); |
| 1855 | } |
| 1856 | |
| 1857 | if( ( ret = mbedtls_ssl_read_record( ssl, 0 ) ) != 0 ) |
Jerry Yu | d267431 | 2021-10-29 10:08:19 +0800 | [diff] [blame] | 1858 | { |
| 1859 | MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_read_record", ret ); |
| 1860 | return( ret ); |
| 1861 | } |
Xiaofei Bai | a0ab777 | 2022-01-16 12:14:45 +0000 | [diff] [blame] | 1862 | ssl->keep_current_message = 1; |
Jerry Yu | d267431 | 2021-10-29 10:08:19 +0800 | [diff] [blame] | 1863 | |
| 1864 | if( ( ssl->in_msgtype == MBEDTLS_SSL_MSG_HANDSHAKE ) && |
| 1865 | ( ssl->in_msg[0] == MBEDTLS_SSL_HS_CERTIFICATE_REQUEST ) ) |
| 1866 | { |
Xiaofei Bai | a0ab777 | 2022-01-16 12:14:45 +0000 | [diff] [blame] | 1867 | return( SSL_CERTIFICATE_REQUEST_EXPECT_REQUEST ); |
Jerry Yu | d267431 | 2021-10-29 10:08:19 +0800 | [diff] [blame] | 1868 | } |
| 1869 | |
Xiaofei Bai | a0ab777 | 2022-01-16 12:14:45 +0000 | [diff] [blame] | 1870 | return( SSL_CERTIFICATE_REQUEST_SKIP ); |
| 1871 | } |
| 1872 | |
Xiaofei Bai | a0ab777 | 2022-01-16 12:14:45 +0000 | [diff] [blame] | 1873 | /* |
| 1874 | * ssl_tls13_parse_certificate_request() |
| 1875 | * Parse certificate request |
| 1876 | * struct { |
| 1877 | * opaque certificate_request_context<0..2^8-1>; |
| 1878 | * Extension extensions<2..2^16-1>; |
| 1879 | * } CertificateRequest; |
| 1880 | */ |
| 1881 | static int ssl_tls13_parse_certificate_request( mbedtls_ssl_context *ssl, |
| 1882 | const unsigned char *buf, |
| 1883 | const unsigned char *end ) |
| 1884 | { |
| 1885 | int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
| 1886 | const unsigned char *p = buf; |
Xiaofei Bai | a0ab777 | 2022-01-16 12:14:45 +0000 | [diff] [blame] | 1887 | size_t certificate_request_context_len = 0; |
Xiaofei Bai | 82f0a9a | 2022-01-26 09:21:54 +0000 | [diff] [blame] | 1888 | size_t extensions_len = 0; |
| 1889 | const unsigned char *extensions_end; |
| 1890 | unsigned char sig_alg_ext_found = 0; |
Xiaofei Bai | a0ab777 | 2022-01-16 12:14:45 +0000 | [diff] [blame] | 1891 | |
Xiaofei Bai | 82f0a9a | 2022-01-26 09:21:54 +0000 | [diff] [blame] | 1892 | /* ... |
| 1893 | * opaque certificate_request_context<0..2^8-1> |
| 1894 | * ... |
| 1895 | */ |
Xiaofei Bai | a0ab777 | 2022-01-16 12:14:45 +0000 | [diff] [blame] | 1896 | MBEDTLS_SSL_CHK_BUF_READ_PTR( p, end, 1 ); |
| 1897 | certificate_request_context_len = (size_t) p[0]; |
Xiaofei Bai | 69fcd39 | 2022-01-20 08:25:00 +0000 | [diff] [blame] | 1898 | p += 1; |
Xiaofei Bai | a0ab777 | 2022-01-16 12:14:45 +0000 | [diff] [blame] | 1899 | |
Xiaofei Bai | a0ab777 | 2022-01-16 12:14:45 +0000 | [diff] [blame] | 1900 | if( certificate_request_context_len > 0 ) |
| 1901 | { |
Xiaofei Bai | c234ecf | 2022-02-08 09:59:23 +0000 | [diff] [blame] | 1902 | MBEDTLS_SSL_CHK_BUF_READ_PTR( p, end, certificate_request_context_len ); |
Xiaofei Bai | a0ab777 | 2022-01-16 12:14:45 +0000 | [diff] [blame] | 1903 | MBEDTLS_SSL_DEBUG_BUF( 3, "Certificate Request Context", |
| 1904 | p, certificate_request_context_len ); |
| 1905 | |
Xiaofei Bai | 82f0a9a | 2022-01-26 09:21:54 +0000 | [diff] [blame] | 1906 | mbedtls_ssl_handshake_params *handshake = ssl->handshake; |
Xiaofei Bai | 69fcd39 | 2022-01-20 08:25:00 +0000 | [diff] [blame] | 1907 | handshake->certificate_request_context = |
Xiaofei Bai | 6d42bb4 | 2022-01-28 08:52:13 +0000 | [diff] [blame] | 1908 | mbedtls_calloc( 1, certificate_request_context_len ); |
Xiaofei Bai | 69fcd39 | 2022-01-20 08:25:00 +0000 | [diff] [blame] | 1909 | if( handshake->certificate_request_context == NULL ) |
Xiaofei Bai | a0ab777 | 2022-01-16 12:14:45 +0000 | [diff] [blame] | 1910 | { |
| 1911 | MBEDTLS_SSL_DEBUG_MSG( 1, ( "buffer too small" ) ); |
| 1912 | return ( MBEDTLS_ERR_SSL_ALLOC_FAILED ); |
| 1913 | } |
Xiaofei Bai | 69fcd39 | 2022-01-20 08:25:00 +0000 | [diff] [blame] | 1914 | memcpy( handshake->certificate_request_context, p, |
Xiaofei Bai | a0ab777 | 2022-01-16 12:14:45 +0000 | [diff] [blame] | 1915 | certificate_request_context_len ); |
Xiaofei Bai | a0ab777 | 2022-01-16 12:14:45 +0000 | [diff] [blame] | 1916 | p += certificate_request_context_len; |
| 1917 | } |
| 1918 | |
Xiaofei Bai | 82f0a9a | 2022-01-26 09:21:54 +0000 | [diff] [blame] | 1919 | /* ... |
| 1920 | * Extension extensions<2..2^16-1>; |
| 1921 | * ... |
Xiaofei Bai | a0ab777 | 2022-01-16 12:14:45 +0000 | [diff] [blame] | 1922 | */ |
| 1923 | MBEDTLS_SSL_CHK_BUF_READ_PTR( p, end, 2 ); |
| 1924 | extensions_len = MBEDTLS_GET_UINT16_BE( p, 0 ); |
| 1925 | p += 2; |
| 1926 | |
| 1927 | MBEDTLS_SSL_CHK_BUF_READ_PTR( p, end, extensions_len ); |
| 1928 | extensions_end = p + extensions_len; |
| 1929 | |
| 1930 | while( p < extensions_end ) |
| 1931 | { |
| 1932 | unsigned int extension_type; |
| 1933 | size_t extension_data_len; |
| 1934 | |
| 1935 | MBEDTLS_SSL_CHK_BUF_READ_PTR( p, extensions_end, 4 ); |
| 1936 | extension_type = MBEDTLS_GET_UINT16_BE( p, 0 ); |
| 1937 | extension_data_len = MBEDTLS_GET_UINT16_BE( p, 2 ); |
| 1938 | p += 4; |
| 1939 | |
| 1940 | MBEDTLS_SSL_CHK_BUF_READ_PTR( p, extensions_end, extension_data_len ); |
| 1941 | |
| 1942 | switch( extension_type ) |
| 1943 | { |
| 1944 | case MBEDTLS_TLS_EXT_SIG_ALG: |
| 1945 | MBEDTLS_SSL_DEBUG_MSG( 3, |
Xiaofei Bai | 69fcd39 | 2022-01-20 08:25:00 +0000 | [diff] [blame] | 1946 | ( "found signature algorithms extension" ) ); |
| 1947 | ret = mbedtls_ssl_tls13_parse_sig_alg_ext( ssl, p, |
Xiaofei Bai | a0ab777 | 2022-01-16 12:14:45 +0000 | [diff] [blame] | 1948 | p + extension_data_len ); |
| 1949 | if( ret != 0 ) |
| 1950 | return( ret ); |
Xiaofei Bai | 82f0a9a | 2022-01-26 09:21:54 +0000 | [diff] [blame] | 1951 | if( ! sig_alg_ext_found ) |
| 1952 | sig_alg_ext_found = 1; |
| 1953 | else |
| 1954 | { |
| 1955 | MBEDTLS_SSL_DEBUG_MSG( 3, |
| 1956 | ( "Duplicate signature algorithms extensions found" ) ); |
Xiaofei Bai | c234ecf | 2022-02-08 09:59:23 +0000 | [diff] [blame] | 1957 | goto decode_error; |
Xiaofei Bai | 82f0a9a | 2022-01-26 09:21:54 +0000 | [diff] [blame] | 1958 | } |
Xiaofei Bai | a0ab777 | 2022-01-16 12:14:45 +0000 | [diff] [blame] | 1959 | break; |
| 1960 | |
| 1961 | default: |
| 1962 | MBEDTLS_SSL_DEBUG_MSG( |
| 1963 | 3, |
| 1964 | ( "unknown extension found: %u ( ignoring )", |
| 1965 | extension_type ) ); |
Xiaofei Bai | 82f0a9a | 2022-01-26 09:21:54 +0000 | [diff] [blame] | 1966 | break; |
Xiaofei Bai | a0ab777 | 2022-01-16 12:14:45 +0000 | [diff] [blame] | 1967 | } |
Xiaofei Bai | a0ab777 | 2022-01-16 12:14:45 +0000 | [diff] [blame] | 1968 | p += extension_data_len; |
| 1969 | } |
Xiaofei Bai | 69fcd39 | 2022-01-20 08:25:00 +0000 | [diff] [blame] | 1970 | /* Check that we consumed all the message. */ |
| 1971 | if( p != end ) |
| 1972 | { |
| 1973 | MBEDTLS_SSL_DEBUG_MSG( 1, |
Xiaofei Bai | c234ecf | 2022-02-08 09:59:23 +0000 | [diff] [blame] | 1974 | ( "CertificateRequest misaligned" ) ); |
| 1975 | goto decode_error; |
Xiaofei Bai | 69fcd39 | 2022-01-20 08:25:00 +0000 | [diff] [blame] | 1976 | } |
| 1977 | /* Check that we found signature algorithms extension */ |
Xiaofei Bai | 82f0a9a | 2022-01-26 09:21:54 +0000 | [diff] [blame] | 1978 | if( ! sig_alg_ext_found ) |
Xiaofei Bai | 69fcd39 | 2022-01-20 08:25:00 +0000 | [diff] [blame] | 1979 | { |
Xiaofei Bai | 6d42bb4 | 2022-01-28 08:52:13 +0000 | [diff] [blame] | 1980 | MBEDTLS_SSL_DEBUG_MSG( 3, |
| 1981 | ( "no signature algorithms extension found" ) ); |
Xiaofei Bai | c234ecf | 2022-02-08 09:59:23 +0000 | [diff] [blame] | 1982 | goto decode_error; |
Xiaofei Bai | 69fcd39 | 2022-01-20 08:25:00 +0000 | [diff] [blame] | 1983 | } |
Xiaofei Bai | a0ab777 | 2022-01-16 12:14:45 +0000 | [diff] [blame] | 1984 | |
Jerry Yu | 7840f81 | 2022-01-29 10:26:51 +0800 | [diff] [blame] | 1985 | ssl->handshake->client_auth = 1; |
Xiaofei Bai | a0ab777 | 2022-01-16 12:14:45 +0000 | [diff] [blame] | 1986 | return( 0 ); |
Xiaofei Bai | 51f515a | 2022-02-08 07:28:04 +0000 | [diff] [blame] | 1987 | |
Xiaofei Bai | c234ecf | 2022-02-08 09:59:23 +0000 | [diff] [blame] | 1988 | decode_error: |
Xiaofei Bai | 51f515a | 2022-02-08 07:28:04 +0000 | [diff] [blame] | 1989 | MBEDTLS_SSL_PEND_FATAL_ALERT( MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR, |
| 1990 | MBEDTLS_ERR_SSL_DECODE_ERROR ); |
| 1991 | return( MBEDTLS_ERR_SSL_DECODE_ERROR ); |
Xiaofei Bai | a0ab777 | 2022-01-16 12:14:45 +0000 | [diff] [blame] | 1992 | } |
Xiaofei Bai | a0ab777 | 2022-01-16 12:14:45 +0000 | [diff] [blame] | 1993 | |
Xiaofei Bai | de3f13e | 2022-01-18 05:47:05 +0000 | [diff] [blame] | 1994 | /* |
| 1995 | * Handler for MBEDTLS_SSL_CERTIFICATE_REQUEST |
| 1996 | */ |
| 1997 | static int ssl_tls13_process_certificate_request( mbedtls_ssl_context *ssl ) |
Xiaofei Bai | a0ab777 | 2022-01-16 12:14:45 +0000 | [diff] [blame] | 1998 | { |
Xiaofei Bai | de3f13e | 2022-01-18 05:47:05 +0000 | [diff] [blame] | 1999 | int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
Xiaofei Bai | a0ab777 | 2022-01-16 12:14:45 +0000 | [diff] [blame] | 2000 | |
| 2001 | MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> parse certificate request" ) ); |
| 2002 | |
Xiaofei Bai | a0ab777 | 2022-01-16 12:14:45 +0000 | [diff] [blame] | 2003 | MBEDTLS_SSL_PROC_CHK_NEG( ssl_tls13_certificate_request_coordinate( ssl ) ); |
| 2004 | |
Xiaofei Bai | a0ab777 | 2022-01-16 12:14:45 +0000 | [diff] [blame] | 2005 | if( ret == SSL_CERTIFICATE_REQUEST_EXPECT_REQUEST ) |
| 2006 | { |
| 2007 | unsigned char *buf; |
| 2008 | size_t buf_len; |
| 2009 | |
| 2010 | MBEDTLS_SSL_PROC_CHK( mbedtls_ssl_tls13_fetch_handshake_msg( ssl, |
| 2011 | MBEDTLS_SSL_HS_CERTIFICATE_REQUEST, |
| 2012 | &buf, &buf_len ) ); |
| 2013 | |
| 2014 | MBEDTLS_SSL_PROC_CHK( ssl_tls13_parse_certificate_request( ssl, |
| 2015 | buf, buf + buf_len ) ); |
| 2016 | |
| 2017 | mbedtls_ssl_tls13_add_hs_msg_to_checksum( |
| 2018 | ssl, MBEDTLS_SSL_HS_CERTIFICATE_REQUEST, buf, buf_len ); |
| 2019 | } |
Xiaofei Bai | 69fcd39 | 2022-01-20 08:25:00 +0000 | [diff] [blame] | 2020 | else if( ret == SSL_CERTIFICATE_REQUEST_SKIP ) |
Xiaofei Bai | a0ab777 | 2022-01-16 12:14:45 +0000 | [diff] [blame] | 2021 | { |
| 2022 | MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip parse certificate request" ) ); |
Xiaofei Bai | f6d3696 | 2022-01-16 14:54:35 +0000 | [diff] [blame] | 2023 | ret = 0; |
Xiaofei Bai | a0ab777 | 2022-01-16 12:14:45 +0000 | [diff] [blame] | 2024 | } |
| 2025 | else |
| 2026 | { |
| 2027 | MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) ); |
Xiaofei Bai | 51f515a | 2022-02-08 07:28:04 +0000 | [diff] [blame] | 2028 | ret = MBEDTLS_ERR_SSL_INTERNAL_ERROR; |
| 2029 | goto cleanup; |
Xiaofei Bai | a0ab777 | 2022-01-16 12:14:45 +0000 | [diff] [blame] | 2030 | } |
| 2031 | |
| 2032 | MBEDTLS_SSL_DEBUG_MSG( 3, ( "got %s certificate request", |
Jerry Yu | 7840f81 | 2022-01-29 10:26:51 +0800 | [diff] [blame] | 2033 | ssl->handshake->client_auth ? "a" : "no" ) ); |
Xiaofei Bai | a0ab777 | 2022-01-16 12:14:45 +0000 | [diff] [blame] | 2034 | |
Jerry Yu | d267431 | 2021-10-29 10:08:19 +0800 | [diff] [blame] | 2035 | mbedtls_ssl_handshake_set_state( ssl, MBEDTLS_SSL_SERVER_CERTIFICATE ); |
| 2036 | |
Xiaofei Bai | a0ab777 | 2022-01-16 12:14:45 +0000 | [diff] [blame] | 2037 | cleanup: |
| 2038 | |
Xiaofei Bai | a0ab777 | 2022-01-16 12:14:45 +0000 | [diff] [blame] | 2039 | MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= parse certificate request" ) ); |
| 2040 | return( ret ); |
Jerry Yu | d267431 | 2021-10-29 10:08:19 +0800 | [diff] [blame] | 2041 | } |
| 2042 | |
| 2043 | /* |
Jerry Yu | 687101b | 2021-09-14 16:03:56 +0800 | [diff] [blame] | 2044 | * Handler for MBEDTLS_SSL_SERVER_CERTIFICATE |
| 2045 | */ |
Xiaofei Bai | 746f948 | 2021-11-12 08:53:56 +0000 | [diff] [blame] | 2046 | static int ssl_tls13_process_server_certificate( mbedtls_ssl_context *ssl ) |
Jerry Yu | 687101b | 2021-09-14 16:03:56 +0800 | [diff] [blame] | 2047 | { |
Xiaofei Bai | 947571e | 2021-09-29 09:12:03 +0000 | [diff] [blame] | 2048 | int ret; |
| 2049 | |
| 2050 | ret = mbedtls_ssl_tls13_process_certificate( ssl ); |
Xiaofei Bai | f93cbd2 | 2021-10-29 02:39:30 +0000 | [diff] [blame] | 2051 | if( ret != 0 ) |
Xiaofei Bai | 947571e | 2021-09-29 09:12:03 +0000 | [diff] [blame] | 2052 | return( ret ); |
| 2053 | |
Jerry Yu | 687101b | 2021-09-14 16:03:56 +0800 | [diff] [blame] | 2054 | mbedtls_ssl_handshake_set_state( ssl, MBEDTLS_SSL_CERTIFICATE_VERIFY ); |
| 2055 | return( 0 ); |
| 2056 | } |
| 2057 | |
| 2058 | /* |
| 2059 | * Handler for MBEDTLS_SSL_CERTIFICATE_VERIFY |
| 2060 | */ |
Xiaofei Bai | 746f948 | 2021-11-12 08:53:56 +0000 | [diff] [blame] | 2061 | static int ssl_tls13_process_certificate_verify( mbedtls_ssl_context *ssl ) |
Jerry Yu | 687101b | 2021-09-14 16:03:56 +0800 | [diff] [blame] | 2062 | { |
Jerry Yu | 30b071c | 2021-09-12 20:16:03 +0800 | [diff] [blame] | 2063 | int ret; |
| 2064 | |
| 2065 | ret = mbedtls_ssl_tls13_process_certificate_verify( ssl ); |
| 2066 | if( ret != 0 ) |
| 2067 | return( ret ); |
| 2068 | |
Jerry Yu | 687101b | 2021-09-14 16:03:56 +0800 | [diff] [blame] | 2069 | mbedtls_ssl_handshake_set_state( ssl, MBEDTLS_SSL_SERVER_FINISHED ); |
| 2070 | return( 0 ); |
| 2071 | } |
Jerry Yu | a93ac11 | 2021-10-27 16:31:48 +0800 | [diff] [blame] | 2072 | #endif /* MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED */ |
Ronald Cron | d4c6402 | 2021-12-06 09:06:46 +0100 | [diff] [blame] | 2073 | |
Jerry Yu | 687101b | 2021-09-14 16:03:56 +0800 | [diff] [blame] | 2074 | /* |
| 2075 | * Handler for MBEDTLS_SSL_SERVER_FINISHED |
| 2076 | */ |
Xiaofei Bai | 746f948 | 2021-11-12 08:53:56 +0000 | [diff] [blame] | 2077 | static int ssl_tls13_process_server_finished( mbedtls_ssl_context *ssl ) |
Jerry Yu | 687101b | 2021-09-14 16:03:56 +0800 | [diff] [blame] | 2078 | { |
XiaokangQian | ac0385c | 2021-11-03 06:40:11 +0000 | [diff] [blame] | 2079 | int ret; |
| 2080 | |
XiaokangQian | c5c39d5 | 2021-11-09 11:55:10 +0000 | [diff] [blame] | 2081 | ret = mbedtls_ssl_tls13_process_finished_message( ssl ); |
XiaokangQian | ac0385c | 2021-11-03 06:40:11 +0000 | [diff] [blame] | 2082 | if( ret != 0 ) |
| 2083 | return( ret ); |
| 2084 | |
Ronald Cron | 49ad619 | 2021-11-24 16:25:31 +0100 | [diff] [blame] | 2085 | #if defined(MBEDTLS_SSL_TLS1_3_COMPATIBILITY_MODE) |
| 2086 | mbedtls_ssl_handshake_set_state( |
| 2087 | ssl, |
| 2088 | MBEDTLS_SSL_CLIENT_CCS_AFTER_SERVER_FINISHED ); |
| 2089 | #else |
Jerry Yu | ca133a3 | 2022-02-15 14:22:05 +0800 | [diff] [blame] | 2090 | mbedtls_ssl_handshake_set_state( ssl, MBEDTLS_SSL_CLIENT_CERTIFICATE ); |
Jerry Yu | 566c781 | 2022-01-26 15:41:22 +0800 | [diff] [blame] | 2091 | #endif /* MBEDTLS_SSL_TLS1_3_COMPATIBILITY_MODE */ |
Ronald Cron | 49ad619 | 2021-11-24 16:25:31 +0100 | [diff] [blame] | 2092 | |
XiaokangQian | ac0385c | 2021-11-03 06:40:11 +0000 | [diff] [blame] | 2093 | return( 0 ); |
Jerry Yu | 687101b | 2021-09-14 16:03:56 +0800 | [diff] [blame] | 2094 | } |
| 2095 | |
| 2096 | /* |
Jerry Yu | 566c781 | 2022-01-26 15:41:22 +0800 | [diff] [blame] | 2097 | * Handler for MBEDTLS_SSL_CLIENT_CERTIFICATE |
| 2098 | */ |
| 2099 | static int ssl_tls13_write_client_certificate( mbedtls_ssl_context *ssl ) |
| 2100 | { |
Ronald Cron | 7a94aca | 2022-03-09 07:44:27 +0100 | [diff] [blame] | 2101 | int non_empty_certificate_msg = 0; |
| 2102 | |
Jerry Yu | 5cc3506 | 2022-01-28 16:16:08 +0800 | [diff] [blame] | 2103 | MBEDTLS_SSL_DEBUG_MSG( 1, |
| 2104 | ( "Switch to handshake traffic keys for outbound traffic" ) ); |
Jerry Yu | 566c781 | 2022-01-26 15:41:22 +0800 | [diff] [blame] | 2105 | mbedtls_ssl_set_outbound_transform( ssl, ssl->handshake->transform_handshake ); |
Jerry Yu | 5cc3506 | 2022-01-28 16:16:08 +0800 | [diff] [blame] | 2106 | |
Ronald Cron | 9df7c80 | 2022-03-08 18:38:54 +0100 | [diff] [blame] | 2107 | #if defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED) |
Ronald Cron | 5bb8fc8 | 2022-03-09 07:00:13 +0100 | [diff] [blame] | 2108 | if( ssl->handshake->client_auth ) |
Ronald Cron | 7a94aca | 2022-03-09 07:44:27 +0100 | [diff] [blame] | 2109 | { |
| 2110 | int ret = mbedtls_ssl_tls13_write_certificate( ssl ); |
| 2111 | if( ret != 0 ) |
| 2112 | return( ret ); |
Ronald Cron | 5bb8fc8 | 2022-03-09 07:00:13 +0100 | [diff] [blame] | 2113 | |
Ronald Cron | 7a94aca | 2022-03-09 07:44:27 +0100 | [diff] [blame] | 2114 | if( mbedtls_ssl_own_cert( ssl ) != NULL ) |
| 2115 | non_empty_certificate_msg = 1; |
| 2116 | } |
| 2117 | else |
| 2118 | { |
| 2119 | MBEDTLS_SSL_DEBUG_MSG( 2, ( "No certificate message to send." ) ); |
| 2120 | } |
Ronald Cron | 9df7c80 | 2022-03-08 18:38:54 +0100 | [diff] [blame] | 2121 | #endif |
Ronald Cron | 5bb8fc8 | 2022-03-09 07:00:13 +0100 | [diff] [blame] | 2122 | |
Ronald Cron | 7a94aca | 2022-03-09 07:44:27 +0100 | [diff] [blame] | 2123 | if( non_empty_certificate_msg ) |
| 2124 | { |
| 2125 | mbedtls_ssl_handshake_set_state( ssl, |
| 2126 | MBEDTLS_SSL_CLIENT_CERTIFICATE_VERIFY ); |
| 2127 | } |
| 2128 | else |
| 2129 | mbedtls_ssl_handshake_set_state( ssl, MBEDTLS_SSL_CLIENT_FINISHED ); |
| 2130 | |
Ronald Cron | 5bb8fc8 | 2022-03-09 07:00:13 +0100 | [diff] [blame] | 2131 | return( 0 ); |
Jerry Yu | 566c781 | 2022-01-26 15:41:22 +0800 | [diff] [blame] | 2132 | } |
| 2133 | |
Ronald Cron | 9df7c80 | 2022-03-08 18:38:54 +0100 | [diff] [blame] | 2134 | #if defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED) |
Jerry Yu | 566c781 | 2022-01-26 15:41:22 +0800 | [diff] [blame] | 2135 | /* |
| 2136 | * Handler for MBEDTLS_SSL_CLIENT_CERTIFICATE_VERIFY |
| 2137 | */ |
| 2138 | static int ssl_tls13_write_client_certificate_verify( mbedtls_ssl_context *ssl ) |
| 2139 | { |
Ronald Cron | a8b3887 | 2022-03-09 07:59:25 +0100 | [diff] [blame] | 2140 | int ret = mbedtls_ssl_tls13_write_certificate_verify( ssl ); |
| 2141 | |
| 2142 | if( ret == 0 ) |
| 2143 | mbedtls_ssl_handshake_set_state( ssl, MBEDTLS_SSL_CLIENT_FINISHED ); |
| 2144 | |
| 2145 | return( ret ); |
Jerry Yu | 566c781 | 2022-01-26 15:41:22 +0800 | [diff] [blame] | 2146 | } |
Jerry Yu | 90f152d | 2022-01-29 22:12:42 +0800 | [diff] [blame] | 2147 | #endif /* MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED */ |
Jerry Yu | 566c781 | 2022-01-26 15:41:22 +0800 | [diff] [blame] | 2148 | |
| 2149 | /* |
Jerry Yu | 687101b | 2021-09-14 16:03:56 +0800 | [diff] [blame] | 2150 | * Handler for MBEDTLS_SSL_CLIENT_FINISHED |
| 2151 | */ |
XiaokangQian | 74af2a8 | 2021-09-22 07:40:30 +0000 | [diff] [blame] | 2152 | static int ssl_tls13_write_client_finished( mbedtls_ssl_context *ssl ) |
Jerry Yu | 687101b | 2021-09-14 16:03:56 +0800 | [diff] [blame] | 2153 | { |
XiaokangQian | 0fa6643 | 2021-11-15 03:33:57 +0000 | [diff] [blame] | 2154 | int ret; |
| 2155 | |
| 2156 | ret = mbedtls_ssl_tls13_write_finished_message( ssl ); |
| 2157 | if( ret != 0 ) |
| 2158 | return( ret ); |
| 2159 | |
| 2160 | mbedtls_ssl_handshake_set_state( ssl, MBEDTLS_SSL_FLUSH_BUFFERS ); |
| 2161 | return( 0 ); |
Jerry Yu | 687101b | 2021-09-14 16:03:56 +0800 | [diff] [blame] | 2162 | } |
| 2163 | |
| 2164 | /* |
| 2165 | * Handler for MBEDTLS_SSL_FLUSH_BUFFERS |
| 2166 | */ |
Xiaofei Bai | 746f948 | 2021-11-12 08:53:56 +0000 | [diff] [blame] | 2167 | static int ssl_tls13_flush_buffers( mbedtls_ssl_context *ssl ) |
Jerry Yu | 687101b | 2021-09-14 16:03:56 +0800 | [diff] [blame] | 2168 | { |
Jerry Yu | 378254d | 2021-10-30 21:44:47 +0800 | [diff] [blame] | 2169 | MBEDTLS_SSL_DEBUG_MSG( 2, ( "handshake: done" ) ); |
Jerry Yu | ad8d0ba | 2021-09-28 17:58:26 +0800 | [diff] [blame] | 2170 | mbedtls_ssl_handshake_set_state( ssl, MBEDTLS_SSL_HANDSHAKE_WRAPUP ); |
Jerry Yu | 687101b | 2021-09-14 16:03:56 +0800 | [diff] [blame] | 2171 | return( 0 ); |
| 2172 | } |
| 2173 | |
| 2174 | /* |
| 2175 | * Handler for MBEDTLS_SSL_HANDSHAKE_WRAPUP |
| 2176 | */ |
Xiaofei Bai | 746f948 | 2021-11-12 08:53:56 +0000 | [diff] [blame] | 2177 | static int ssl_tls13_handshake_wrapup( mbedtls_ssl_context *ssl ) |
Jerry Yu | 687101b | 2021-09-14 16:03:56 +0800 | [diff] [blame] | 2178 | { |
Jerry Yu | 378254d | 2021-10-30 21:44:47 +0800 | [diff] [blame] | 2179 | MBEDTLS_SSL_DEBUG_MSG( 1, ( "Switch to application keys for inbound traffic" ) ); |
| 2180 | mbedtls_ssl_set_inbound_transform ( ssl, ssl->transform_application ); |
| 2181 | |
| 2182 | MBEDTLS_SSL_DEBUG_MSG( 1, ( "Switch to application keys for outbound traffic" ) ); |
| 2183 | mbedtls_ssl_set_outbound_transform( ssl, ssl->transform_application ); |
| 2184 | |
| 2185 | mbedtls_ssl_tls13_handshake_wrapup( ssl ); |
| 2186 | |
| 2187 | mbedtls_ssl_handshake_set_state( ssl, MBEDTLS_SSL_HANDSHAKE_OVER ); |
| 2188 | return( 0 ); |
Jerry Yu | 687101b | 2021-09-14 16:03:56 +0800 | [diff] [blame] | 2189 | } |
| 2190 | |
Jerry Yu | 92c6b40 | 2021-08-27 16:59:09 +0800 | [diff] [blame] | 2191 | int mbedtls_ssl_tls13_handshake_client_step( mbedtls_ssl_context *ssl ) |
Jerry Yu | bc20bdd | 2021-08-24 15:59:48 +0800 | [diff] [blame] | 2192 | { |
Jerry Yu | 92c6b40 | 2021-08-27 16:59:09 +0800 | [diff] [blame] | 2193 | int ret = 0; |
Jerry Yu | c8a392c | 2021-08-18 16:46:28 +0800 | [diff] [blame] | 2194 | |
Jerry Yu | e3b3412 | 2021-09-28 17:53:35 +0800 | [diff] [blame] | 2195 | MBEDTLS_SSL_DEBUG_MSG( 2, ( "tls13 client state: %s(%d)", |
| 2196 | mbedtls_ssl_states_str( ssl->state ), |
| 2197 | ssl->state ) ); |
Jerry Yu | 92c6b40 | 2021-08-27 16:59:09 +0800 | [diff] [blame] | 2198 | |
| 2199 | switch( ssl->state ) |
| 2200 | { |
| 2201 | /* |
Jerry Yu | 0c63af6 | 2021-09-02 12:59:12 +0800 | [diff] [blame] | 2202 | * ssl->state is initialized as HELLO_REQUEST. It is the same |
| 2203 | * as CLIENT_HELLO state. |
Jerry Yu | 92c6b40 | 2021-08-27 16:59:09 +0800 | [diff] [blame] | 2204 | */ |
| 2205 | case MBEDTLS_SSL_HELLO_REQUEST: |
| 2206 | case MBEDTLS_SSL_CLIENT_HELLO: |
| 2207 | ret = ssl_tls13_write_client_hello( ssl ); |
| 2208 | break; |
| 2209 | |
| 2210 | case MBEDTLS_SSL_SERVER_HELLO: |
Xiaofei Bai | 746f948 | 2021-11-12 08:53:56 +0000 | [diff] [blame] | 2211 | ret = ssl_tls13_process_server_hello( ssl ); |
Jerry Yu | 687101b | 2021-09-14 16:03:56 +0800 | [diff] [blame] | 2212 | break; |
| 2213 | |
| 2214 | case MBEDTLS_SSL_ENCRYPTED_EXTENSIONS: |
XiaokangQian | 97799ac | 2021-10-11 10:05:54 +0000 | [diff] [blame] | 2215 | ret = ssl_tls13_process_encrypted_extensions( ssl ); |
Jerry Yu | 687101b | 2021-09-14 16:03:56 +0800 | [diff] [blame] | 2216 | break; |
| 2217 | |
Jerry Yu | a93ac11 | 2021-10-27 16:31:48 +0800 | [diff] [blame] | 2218 | #if defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED) |
Jerry Yu | d267431 | 2021-10-29 10:08:19 +0800 | [diff] [blame] | 2219 | case MBEDTLS_SSL_CERTIFICATE_REQUEST: |
| 2220 | ret = ssl_tls13_process_certificate_request( ssl ); |
| 2221 | break; |
| 2222 | |
Jerry Yu | 687101b | 2021-09-14 16:03:56 +0800 | [diff] [blame] | 2223 | case MBEDTLS_SSL_SERVER_CERTIFICATE: |
Xiaofei Bai | 746f948 | 2021-11-12 08:53:56 +0000 | [diff] [blame] | 2224 | ret = ssl_tls13_process_server_certificate( ssl ); |
Jerry Yu | 687101b | 2021-09-14 16:03:56 +0800 | [diff] [blame] | 2225 | break; |
| 2226 | |
| 2227 | case MBEDTLS_SSL_CERTIFICATE_VERIFY: |
Xiaofei Bai | 746f948 | 2021-11-12 08:53:56 +0000 | [diff] [blame] | 2228 | ret = ssl_tls13_process_certificate_verify( ssl ); |
Jerry Yu | 687101b | 2021-09-14 16:03:56 +0800 | [diff] [blame] | 2229 | break; |
Jerry Yu | a93ac11 | 2021-10-27 16:31:48 +0800 | [diff] [blame] | 2230 | #endif /* MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED */ |
Jerry Yu | 687101b | 2021-09-14 16:03:56 +0800 | [diff] [blame] | 2231 | |
| 2232 | case MBEDTLS_SSL_SERVER_FINISHED: |
Xiaofei Bai | 746f948 | 2021-11-12 08:53:56 +0000 | [diff] [blame] | 2233 | ret = ssl_tls13_process_server_finished( ssl ); |
Jerry Yu | 687101b | 2021-09-14 16:03:56 +0800 | [diff] [blame] | 2234 | break; |
| 2235 | |
Jerry Yu | 566c781 | 2022-01-26 15:41:22 +0800 | [diff] [blame] | 2236 | case MBEDTLS_SSL_CLIENT_CERTIFICATE: |
| 2237 | ret = ssl_tls13_write_client_certificate( ssl ); |
| 2238 | break; |
| 2239 | |
Ronald Cron | 9df7c80 | 2022-03-08 18:38:54 +0100 | [diff] [blame] | 2240 | #if defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED) |
Jerry Yu | 566c781 | 2022-01-26 15:41:22 +0800 | [diff] [blame] | 2241 | case MBEDTLS_SSL_CLIENT_CERTIFICATE_VERIFY: |
| 2242 | ret = ssl_tls13_write_client_certificate_verify( ssl ); |
| 2243 | break; |
Jerry Yu | 90f152d | 2022-01-29 22:12:42 +0800 | [diff] [blame] | 2244 | #endif /* MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED */ |
Jerry Yu | 566c781 | 2022-01-26 15:41:22 +0800 | [diff] [blame] | 2245 | |
Jerry Yu | 687101b | 2021-09-14 16:03:56 +0800 | [diff] [blame] | 2246 | case MBEDTLS_SSL_CLIENT_FINISHED: |
XiaokangQian | 74af2a8 | 2021-09-22 07:40:30 +0000 | [diff] [blame] | 2247 | ret = ssl_tls13_write_client_finished( ssl ); |
Jerry Yu | 687101b | 2021-09-14 16:03:56 +0800 | [diff] [blame] | 2248 | break; |
| 2249 | |
| 2250 | case MBEDTLS_SSL_FLUSH_BUFFERS: |
Xiaofei Bai | 746f948 | 2021-11-12 08:53:56 +0000 | [diff] [blame] | 2251 | ret = ssl_tls13_flush_buffers( ssl ); |
Jerry Yu | 687101b | 2021-09-14 16:03:56 +0800 | [diff] [blame] | 2252 | break; |
| 2253 | |
| 2254 | case MBEDTLS_SSL_HANDSHAKE_WRAPUP: |
Xiaofei Bai | 746f948 | 2021-11-12 08:53:56 +0000 | [diff] [blame] | 2255 | ret = ssl_tls13_handshake_wrapup( ssl ); |
Jerry Yu | 92c6b40 | 2021-08-27 16:59:09 +0800 | [diff] [blame] | 2256 | break; |
| 2257 | |
Ronald Cron | 49ad619 | 2021-11-24 16:25:31 +0100 | [diff] [blame] | 2258 | /* |
| 2259 | * Injection of dummy-CCS's for middlebox compatibility |
| 2260 | */ |
| 2261 | #if defined(MBEDTLS_SSL_TLS1_3_COMPATIBILITY_MODE) |
XiaokangQian | 0b56a8f | 2021-12-22 02:39:32 +0000 | [diff] [blame] | 2262 | case MBEDTLS_SSL_CLIENT_CCS_BEFORE_2ND_CLIENT_HELLO: |
Ronald Cron | 9f55f63 | 2022-02-02 16:02:47 +0100 | [diff] [blame] | 2263 | ret = mbedtls_ssl_tls13_write_change_cipher_spec( ssl ); |
| 2264 | if( ret == 0 ) |
| 2265 | mbedtls_ssl_handshake_set_state( ssl, MBEDTLS_SSL_CLIENT_HELLO ); |
| 2266 | break; |
| 2267 | |
| 2268 | case MBEDTLS_SSL_CLIENT_CCS_AFTER_SERVER_FINISHED: |
| 2269 | ret = mbedtls_ssl_tls13_write_change_cipher_spec( ssl ); |
| 2270 | if( ret == 0 ) |
| 2271 | mbedtls_ssl_handshake_set_state( ssl, MBEDTLS_SSL_CLIENT_CERTIFICATE ); |
Ronald Cron | 49ad619 | 2021-11-24 16:25:31 +0100 | [diff] [blame] | 2272 | break; |
| 2273 | #endif /* MBEDTLS_SSL_TLS1_3_COMPATIBILITY_MODE */ |
| 2274 | |
Jerry Yu | 92c6b40 | 2021-08-27 16:59:09 +0800 | [diff] [blame] | 2275 | default: |
| 2276 | MBEDTLS_SSL_DEBUG_MSG( 1, ( "invalid state %d", ssl->state ) ); |
| 2277 | return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); |
| 2278 | } |
| 2279 | |
| 2280 | return( ret ); |
| 2281 | } |
Jerry Yu | 65dd2cc | 2021-08-18 16:38:40 +0800 | [diff] [blame] | 2282 | |
Jerry Yu | fb4b647 | 2022-01-27 15:03:26 +0800 | [diff] [blame] | 2283 | #endif /* MBEDTLS_SSL_CLI_C && MBEDTLS_SSL_PROTO_TLS1_3 */ |
Jerry Yu | 3cc4c2a | 2021-08-06 16:29:08 +0800 | [diff] [blame] | 2284 | |
Jerry Yu | fb4b647 | 2022-01-27 15:03:26 +0800 | [diff] [blame] | 2285 | |