Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
| 2 | * All rights reserved. |
| 3 | * |
| 4 | * This package is an SSL implementation written |
| 5 | * by Eric Young (eay@cryptsoft.com). |
| 6 | * The implementation was written so as to conform with Netscapes SSL. |
| 7 | * |
| 8 | * This library is free for commercial and non-commercial use as long as |
| 9 | * the following conditions are aheared to. The following conditions |
| 10 | * apply to all code found in this distribution, be it the RC4, RSA, |
| 11 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation |
| 12 | * included with this distribution is covered by the same copyright terms |
| 13 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). |
| 14 | * |
| 15 | * Copyright remains Eric Young's, and as such any Copyright notices in |
| 16 | * the code are not to be removed. |
| 17 | * If this package is used in a product, Eric Young should be given attribution |
| 18 | * as the author of the parts of the library used. |
| 19 | * This can be in the form of a textual message at program startup or |
| 20 | * in documentation (online or textual) provided with the package. |
| 21 | * |
| 22 | * Redistribution and use in source and binary forms, with or without |
| 23 | * modification, are permitted provided that the following conditions |
| 24 | * are met: |
| 25 | * 1. Redistributions of source code must retain the copyright |
| 26 | * notice, this list of conditions and the following disclaimer. |
| 27 | * 2. Redistributions in binary form must reproduce the above copyright |
| 28 | * notice, this list of conditions and the following disclaimer in the |
| 29 | * documentation and/or other materials provided with the distribution. |
| 30 | * 3. All advertising materials mentioning features or use of this software |
| 31 | * must display the following acknowledgement: |
| 32 | * "This product includes cryptographic software written by |
| 33 | * Eric Young (eay@cryptsoft.com)" |
| 34 | * The word 'cryptographic' can be left out if the rouines from the library |
| 35 | * being used are not cryptographic related :-). |
| 36 | * 4. If you include any Windows specific code (or a derivative thereof) from |
| 37 | * the apps directory (application code) you must include an acknowledgement: |
| 38 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" |
| 39 | * |
| 40 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
| 41 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 42 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 43 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| 44 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 45 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 46 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 47 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 48 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 49 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 50 | * SUCH DAMAGE. |
| 51 | * |
| 52 | * The licence and distribution terms for any publically available version or |
| 53 | * derivative of this code cannot be changed. i.e. this code cannot simply be |
| 54 | * copied and put under another distribution licence |
| 55 | * [including the GNU Public Licence.] |
| 56 | */ |
| 57 | /* ==================================================================== |
| 58 | * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved. |
| 59 | * |
| 60 | * Redistribution and use in source and binary forms, with or without |
| 61 | * modification, are permitted provided that the following conditions |
| 62 | * are met: |
| 63 | * |
| 64 | * 1. Redistributions of source code must retain the above copyright |
| 65 | * notice, this list of conditions and the following disclaimer. |
| 66 | * |
| 67 | * 2. Redistributions in binary form must reproduce the above copyright |
| 68 | * notice, this list of conditions and the following disclaimer in |
| 69 | * the documentation and/or other materials provided with the |
| 70 | * distribution. |
| 71 | * |
| 72 | * 3. All advertising materials mentioning features or use of this |
| 73 | * software must display the following acknowledgment: |
| 74 | * "This product includes software developed by the OpenSSL Project |
| 75 | * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" |
| 76 | * |
| 77 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to |
| 78 | * endorse or promote products derived from this software without |
| 79 | * prior written permission. For written permission, please contact |
| 80 | * openssl-core@openssl.org. |
| 81 | * |
| 82 | * 5. Products derived from this software may not be called "OpenSSL" |
| 83 | * nor may "OpenSSL" appear in their names without prior written |
| 84 | * permission of the OpenSSL Project. |
| 85 | * |
| 86 | * 6. Redistributions of any form whatsoever must retain the following |
| 87 | * acknowledgment: |
| 88 | * "This product includes software developed by the OpenSSL Project |
| 89 | * for use in the OpenSSL Toolkit (http://www.openssl.org/)" |
| 90 | * |
| 91 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY |
| 92 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 93 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 94 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR |
| 95 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 96 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 97 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| 98 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 99 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 100 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 101 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
| 102 | * OF THE POSSIBILITY OF SUCH DAMAGE. |
| 103 | * ==================================================================== |
| 104 | * |
| 105 | * This product includes cryptographic software written by Eric Young |
| 106 | * (eay@cryptsoft.com). This product includes software written by Tim |
| 107 | * Hudson (tjh@cryptsoft.com). |
| 108 | * |
| 109 | */ |
| 110 | /* ==================================================================== |
| 111 | * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. |
| 112 | * |
| 113 | * Portions of the attached software ("Contribution") are developed by |
| 114 | * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project. |
| 115 | * |
| 116 | * The Contribution is licensed pursuant to the OpenSSL open source |
| 117 | * license provided above. |
| 118 | * |
| 119 | * ECC cipher suite support in OpenSSL originally written by |
| 120 | * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories. |
| 121 | * |
| 122 | */ |
| 123 | /* ==================================================================== |
| 124 | * Copyright 2005 Nokia. All rights reserved. |
| 125 | * |
| 126 | * The portions of the attached software ("Contribution") is developed by |
| 127 | * Nokia Corporation and is licensed pursuant to the OpenSSL open source |
| 128 | * license. |
| 129 | * |
| 130 | * The Contribution, originally written by Mika Kousa and Pasi Eronen of |
| 131 | * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites |
| 132 | * support (see RFC 4279) to OpenSSL. |
| 133 | * |
| 134 | * No patent licenses or other rights except those expressly stated in |
| 135 | * the OpenSSL open source license shall be deemed granted or received |
| 136 | * expressly, by implication, estoppel, or otherwise. |
| 137 | * |
| 138 | * No assurances are provided by Nokia that the Contribution does not |
| 139 | * infringe the patent or other intellectual property rights of any third |
| 140 | * party or that the license provides you with all the necessary rights |
| 141 | * to make use of the Contribution. |
| 142 | * |
| 143 | * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN |
| 144 | * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA |
| 145 | * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY |
| 146 | * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR |
| 147 | * OTHERWISE. |
| 148 | */ |
| 149 | |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 150 | #include <openssl/ssl.h> |
| 151 | |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 152 | #include <assert.h> |
| 153 | #include <stdio.h> |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 154 | #include <string.h> |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 155 | |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 156 | #include <openssl/bn.h> |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 157 | #include <openssl/buf.h> |
| 158 | #include <openssl/bytestring.h> |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 159 | #include <openssl/dh.h> |
| 160 | #include <openssl/ec_key.h> |
| 161 | #include <openssl/ecdsa.h> |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 162 | #include <openssl/err.h> |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 163 | #include <openssl/evp.h> |
Kenny Root | a04d78d | 2015-09-25 00:26:37 +0000 | [diff] [blame] | 164 | #include <openssl/md5.h> |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 165 | #include <openssl/mem.h> |
| 166 | #include <openssl/obj.h> |
| 167 | #include <openssl/rand.h> |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 168 | #include <openssl/x509.h> |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 169 | #include <openssl/x509v3.h> |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 170 | |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 171 | #include "internal.h" |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 172 | #include "../crypto/dh/internal.h" |
| 173 | |
| 174 | |
| 175 | int ssl3_connect(SSL *s) { |
| 176 | BUF_MEM *buf = NULL; |
Kenny Root | e99801b | 2015-11-06 15:31:15 -0800 | [diff] [blame] | 177 | void (*cb)(const SSL *ssl, int type, int value) = NULL; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 178 | int ret = -1; |
| 179 | int new_state, state, skip = 0; |
| 180 | |
| 181 | assert(s->handshake_func == ssl3_connect); |
| 182 | assert(!s->server); |
| 183 | assert(!SSL_IS_DTLS(s)); |
| 184 | |
| 185 | ERR_clear_error(); |
| 186 | ERR_clear_system_error(); |
| 187 | |
| 188 | if (s->info_callback != NULL) { |
| 189 | cb = s->info_callback; |
| 190 | } else if (s->ctx->info_callback != NULL) { |
| 191 | cb = s->ctx->info_callback; |
| 192 | } |
| 193 | |
| 194 | s->in_handshake++; |
| 195 | |
| 196 | for (;;) { |
| 197 | state = s->state; |
| 198 | |
| 199 | switch (s->state) { |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 200 | case SSL_ST_CONNECT: |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 201 | if (cb != NULL) { |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 202 | cb(s, SSL_CB_HANDSHAKE_START, 1); |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 203 | } |
| 204 | |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 205 | if (s->init_buf == NULL) { |
| 206 | buf = BUF_MEM_new(); |
| 207 | if (buf == NULL || |
| 208 | !BUF_MEM_grow(buf, SSL3_RT_MAX_PLAIN_LENGTH)) { |
| 209 | ret = -1; |
| 210 | goto end; |
| 211 | } |
| 212 | |
| 213 | s->init_buf = buf; |
| 214 | buf = NULL; |
| 215 | } |
| 216 | |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 217 | if (!ssl_init_wbio_buffer(s, 0)) { |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 218 | ret = -1; |
| 219 | goto end; |
| 220 | } |
| 221 | |
| 222 | /* don't push the buffering BIO quite yet */ |
| 223 | |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 224 | if (!ssl3_init_handshake_buffer(s)) { |
| 225 | OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 226 | ret = -1; |
| 227 | goto end; |
| 228 | } |
| 229 | |
| 230 | s->state = SSL3_ST_CW_CLNT_HELLO_A; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 231 | s->init_num = 0; |
| 232 | break; |
| 233 | |
| 234 | case SSL3_ST_CW_CLNT_HELLO_A: |
| 235 | case SSL3_ST_CW_CLNT_HELLO_B: |
| 236 | s->shutdown = 0; |
| 237 | ret = ssl3_send_client_hello(s); |
| 238 | if (ret <= 0) { |
| 239 | goto end; |
| 240 | } |
| 241 | s->state = SSL3_ST_CR_SRVR_HELLO_A; |
| 242 | s->init_num = 0; |
| 243 | |
| 244 | /* turn on buffering for the next lot of output */ |
| 245 | if (s->bbio != s->wbio) { |
| 246 | s->wbio = BIO_push(s->bbio, s->wbio); |
| 247 | } |
| 248 | |
| 249 | break; |
| 250 | |
| 251 | case SSL3_ST_CR_SRVR_HELLO_A: |
| 252 | case SSL3_ST_CR_SRVR_HELLO_B: |
| 253 | ret = ssl3_get_server_hello(s); |
| 254 | if (ret <= 0) { |
| 255 | goto end; |
| 256 | } |
| 257 | |
| 258 | if (s->hit) { |
| 259 | s->state = SSL3_ST_CR_CHANGE; |
| 260 | if (s->tlsext_ticket_expected) { |
| 261 | /* receive renewed session ticket */ |
| 262 | s->state = SSL3_ST_CR_SESSION_TICKET_A; |
| 263 | } |
| 264 | } else { |
| 265 | s->state = SSL3_ST_CR_CERT_A; |
| 266 | } |
| 267 | s->init_num = 0; |
| 268 | break; |
| 269 | |
| 270 | case SSL3_ST_CR_CERT_A: |
| 271 | case SSL3_ST_CR_CERT_B: |
| 272 | if (ssl_cipher_has_server_public_key(s->s3->tmp.new_cipher)) { |
| 273 | ret = ssl3_get_server_certificate(s); |
| 274 | if (ret <= 0) { |
| 275 | goto end; |
| 276 | } |
| 277 | if (s->s3->tmp.certificate_status_expected) { |
| 278 | s->state = SSL3_ST_CR_CERT_STATUS_A; |
| 279 | } else { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 280 | s->state = SSL3_ST_VERIFY_SERVER_CERT; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 281 | } |
| 282 | } else { |
| 283 | skip = 1; |
| 284 | s->state = SSL3_ST_CR_KEY_EXCH_A; |
| 285 | } |
| 286 | s->init_num = 0; |
| 287 | break; |
| 288 | |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 289 | case SSL3_ST_VERIFY_SERVER_CERT: |
| 290 | ret = ssl3_verify_server_cert(s); |
| 291 | if (ret <= 0) { |
| 292 | goto end; |
| 293 | } |
| 294 | |
| 295 | s->state = SSL3_ST_CR_KEY_EXCH_A; |
| 296 | s->init_num = 0; |
| 297 | break; |
| 298 | |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 299 | case SSL3_ST_CR_KEY_EXCH_A: |
| 300 | case SSL3_ST_CR_KEY_EXCH_B: |
| 301 | ret = ssl3_get_server_key_exchange(s); |
| 302 | if (ret <= 0) { |
| 303 | goto end; |
| 304 | } |
| 305 | s->state = SSL3_ST_CR_CERT_REQ_A; |
| 306 | s->init_num = 0; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 307 | break; |
| 308 | |
| 309 | case SSL3_ST_CR_CERT_REQ_A: |
| 310 | case SSL3_ST_CR_CERT_REQ_B: |
| 311 | ret = ssl3_get_certificate_request(s); |
| 312 | if (ret <= 0) { |
| 313 | goto end; |
| 314 | } |
| 315 | s->state = SSL3_ST_CR_SRVR_DONE_A; |
| 316 | s->init_num = 0; |
| 317 | break; |
| 318 | |
| 319 | case SSL3_ST_CR_SRVR_DONE_A: |
| 320 | case SSL3_ST_CR_SRVR_DONE_B: |
| 321 | ret = ssl3_get_server_done(s); |
| 322 | if (ret <= 0) { |
| 323 | goto end; |
| 324 | } |
| 325 | if (s->s3->tmp.cert_req) { |
| 326 | s->state = SSL3_ST_CW_CERT_A; |
| 327 | } else { |
| 328 | s->state = SSL3_ST_CW_KEY_EXCH_A; |
| 329 | } |
| 330 | s->init_num = 0; |
| 331 | |
| 332 | break; |
| 333 | |
| 334 | case SSL3_ST_CW_CERT_A: |
| 335 | case SSL3_ST_CW_CERT_B: |
| 336 | case SSL3_ST_CW_CERT_C: |
| 337 | case SSL3_ST_CW_CERT_D: |
| 338 | ret = ssl3_send_client_certificate(s); |
| 339 | if (ret <= 0) { |
| 340 | goto end; |
| 341 | } |
| 342 | s->state = SSL3_ST_CW_KEY_EXCH_A; |
| 343 | s->init_num = 0; |
| 344 | break; |
| 345 | |
| 346 | case SSL3_ST_CW_KEY_EXCH_A: |
| 347 | case SSL3_ST_CW_KEY_EXCH_B: |
| 348 | ret = ssl3_send_client_key_exchange(s); |
| 349 | if (ret <= 0) { |
| 350 | goto end; |
| 351 | } |
| 352 | /* For TLS, cert_req is set to 2, so a cert chain |
| 353 | * of nothing is sent, but no verify packet is sent */ |
| 354 | if (s->s3->tmp.cert_req == 1) { |
| 355 | s->state = SSL3_ST_CW_CERT_VRFY_A; |
| 356 | } else { |
| 357 | s->state = SSL3_ST_CW_CHANGE_A; |
| 358 | s->s3->change_cipher_spec = 0; |
| 359 | } |
| 360 | |
| 361 | s->init_num = 0; |
| 362 | break; |
| 363 | |
| 364 | case SSL3_ST_CW_CERT_VRFY_A: |
| 365 | case SSL3_ST_CW_CERT_VRFY_B: |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 366 | case SSL3_ST_CW_CERT_VRFY_C: |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 367 | ret = ssl3_send_cert_verify(s); |
| 368 | if (ret <= 0) { |
| 369 | goto end; |
| 370 | } |
| 371 | s->state = SSL3_ST_CW_CHANGE_A; |
| 372 | s->init_num = 0; |
| 373 | s->s3->change_cipher_spec = 0; |
| 374 | break; |
| 375 | |
| 376 | case SSL3_ST_CW_CHANGE_A: |
| 377 | case SSL3_ST_CW_CHANGE_B: |
| 378 | ret = ssl3_send_change_cipher_spec(s, SSL3_ST_CW_CHANGE_A, |
| 379 | SSL3_ST_CW_CHANGE_B); |
| 380 | if (ret <= 0) { |
| 381 | goto end; |
| 382 | } |
| 383 | |
| 384 | s->state = SSL3_ST_CW_FINISHED_A; |
| 385 | if (s->s3->tlsext_channel_id_valid) { |
| 386 | s->state = SSL3_ST_CW_CHANNEL_ID_A; |
| 387 | } |
| 388 | if (s->s3->next_proto_neg_seen) { |
| 389 | s->state = SSL3_ST_CW_NEXT_PROTO_A; |
| 390 | } |
| 391 | s->init_num = 0; |
| 392 | |
| 393 | s->session->cipher = s->s3->tmp.new_cipher; |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 394 | if (!s->enc_method->setup_key_block(s) || |
| 395 | !s->enc_method->change_cipher_state( |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 396 | s, SSL3_CHANGE_CIPHER_CLIENT_WRITE)) { |
| 397 | ret = -1; |
| 398 | goto end; |
| 399 | } |
| 400 | |
| 401 | break; |
| 402 | |
| 403 | case SSL3_ST_CW_NEXT_PROTO_A: |
| 404 | case SSL3_ST_CW_NEXT_PROTO_B: |
| 405 | ret = ssl3_send_next_proto(s); |
| 406 | if (ret <= 0) { |
| 407 | goto end; |
| 408 | } |
| 409 | |
| 410 | if (s->s3->tlsext_channel_id_valid) { |
| 411 | s->state = SSL3_ST_CW_CHANNEL_ID_A; |
| 412 | } else { |
| 413 | s->state = SSL3_ST_CW_FINISHED_A; |
| 414 | } |
| 415 | break; |
| 416 | |
| 417 | case SSL3_ST_CW_CHANNEL_ID_A: |
| 418 | case SSL3_ST_CW_CHANNEL_ID_B: |
| 419 | ret = ssl3_send_channel_id(s); |
| 420 | if (ret <= 0) { |
| 421 | goto end; |
| 422 | } |
| 423 | s->state = SSL3_ST_CW_FINISHED_A; |
| 424 | break; |
| 425 | |
| 426 | case SSL3_ST_CW_FINISHED_A: |
| 427 | case SSL3_ST_CW_FINISHED_B: |
| 428 | ret = |
| 429 | ssl3_send_finished(s, SSL3_ST_CW_FINISHED_A, SSL3_ST_CW_FINISHED_B, |
| 430 | s->enc_method->client_finished_label, |
| 431 | s->enc_method->client_finished_label_len); |
| 432 | if (ret <= 0) { |
| 433 | goto end; |
| 434 | } |
| 435 | s->state = SSL3_ST_CW_FLUSH; |
| 436 | |
| 437 | if (s->hit) { |
| 438 | s->s3->tmp.next_state = SSL_ST_OK; |
| 439 | } else { |
| 440 | /* This is a non-resumption handshake. If it involves ChannelID, then |
| 441 | * record the handshake hashes at this point in the session so that |
| 442 | * any resumption of this session with ChannelID can sign those |
| 443 | * hashes. */ |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 444 | ret = tls1_record_handshake_hashes_for_channel_id(s); |
| 445 | if (ret <= 0) { |
| 446 | goto end; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 447 | } |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 448 | if ((SSL_get_mode(s) & SSL_MODE_ENABLE_FALSE_START) && |
| 449 | ssl3_can_false_start(s) && |
| 450 | /* No False Start on renegotiation (would complicate the state |
| 451 | * machine). */ |
Adam Langley | f4e4272 | 2015-06-04 17:45:09 -0700 | [diff] [blame] | 452 | !s->s3->initial_handshake_complete) { |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 453 | s->s3->tmp.next_state = SSL3_ST_FALSE_START; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 454 | } else { |
| 455 | /* Allow NewSessionTicket if ticket expected */ |
| 456 | if (s->tlsext_ticket_expected) { |
| 457 | s->s3->tmp.next_state = SSL3_ST_CR_SESSION_TICKET_A; |
| 458 | } else { |
| 459 | s->s3->tmp.next_state = SSL3_ST_CR_CHANGE; |
| 460 | } |
| 461 | } |
| 462 | } |
| 463 | s->init_num = 0; |
| 464 | break; |
| 465 | |
| 466 | case SSL3_ST_CR_SESSION_TICKET_A: |
| 467 | case SSL3_ST_CR_SESSION_TICKET_B: |
| 468 | ret = ssl3_get_new_session_ticket(s); |
| 469 | if (ret <= 0) { |
| 470 | goto end; |
| 471 | } |
| 472 | s->state = SSL3_ST_CR_CHANGE; |
| 473 | s->init_num = 0; |
| 474 | break; |
| 475 | |
| 476 | case SSL3_ST_CR_CERT_STATUS_A: |
| 477 | case SSL3_ST_CR_CERT_STATUS_B: |
| 478 | ret = ssl3_get_cert_status(s); |
| 479 | if (ret <= 0) { |
| 480 | goto end; |
| 481 | } |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 482 | s->state = SSL3_ST_VERIFY_SERVER_CERT; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 483 | s->init_num = 0; |
| 484 | break; |
| 485 | |
| 486 | case SSL3_ST_CR_CHANGE: |
| 487 | /* At this point, the next message must be entirely behind a |
| 488 | * ChangeCipherSpec. */ |
| 489 | if (!ssl3_expect_change_cipher_spec(s)) { |
| 490 | ret = -1; |
| 491 | goto end; |
| 492 | } |
| 493 | s->state = SSL3_ST_CR_FINISHED_A; |
| 494 | break; |
| 495 | |
| 496 | case SSL3_ST_CR_FINISHED_A: |
| 497 | case SSL3_ST_CR_FINISHED_B: |
| 498 | ret = |
| 499 | ssl3_get_finished(s, SSL3_ST_CR_FINISHED_A, SSL3_ST_CR_FINISHED_B); |
| 500 | if (ret <= 0) { |
| 501 | goto end; |
| 502 | } |
| 503 | |
| 504 | if (s->hit) { |
| 505 | s->state = SSL3_ST_CW_CHANGE_A; |
| 506 | } else { |
| 507 | s->state = SSL_ST_OK; |
| 508 | } |
| 509 | s->init_num = 0; |
| 510 | break; |
| 511 | |
| 512 | case SSL3_ST_CW_FLUSH: |
| 513 | s->rwstate = SSL_WRITING; |
| 514 | if (BIO_flush(s->wbio) <= 0) { |
| 515 | ret = -1; |
| 516 | goto end; |
| 517 | } |
| 518 | s->rwstate = SSL_NOTHING; |
| 519 | s->state = s->s3->tmp.next_state; |
| 520 | break; |
| 521 | |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 522 | case SSL3_ST_FALSE_START: |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 523 | /* Allow NewSessionTicket if ticket expected */ |
| 524 | if (s->tlsext_ticket_expected) { |
| 525 | s->state = SSL3_ST_CR_SESSION_TICKET_A; |
| 526 | } else { |
| 527 | s->state = SSL3_ST_CR_CHANGE; |
| 528 | } |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 529 | s->s3->tmp.in_false_start = 1; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 530 | |
| 531 | ssl_free_wbio_buffer(s); |
| 532 | ret = 1; |
| 533 | goto end; |
| 534 | |
| 535 | case SSL_ST_OK: |
| 536 | /* clean a few things up */ |
| 537 | ssl3_cleanup_key_block(s); |
| 538 | |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 539 | BUF_MEM_free(s->init_buf); |
| 540 | s->init_buf = NULL; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 541 | |
| 542 | /* Remove write buffering now. */ |
| 543 | ssl_free_wbio_buffer(s); |
| 544 | |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 545 | const int is_initial_handshake = !s->s3->initial_handshake_complete; |
| 546 | |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 547 | s->init_num = 0; |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 548 | s->s3->tmp.in_false_start = 0; |
Adam Langley | f4e4272 | 2015-06-04 17:45:09 -0700 | [diff] [blame] | 549 | s->s3->initial_handshake_complete = 1; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 550 | |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 551 | if (is_initial_handshake) { |
| 552 | /* Renegotiations do not participate in session resumption. */ |
| 553 | ssl_update_cache(s, SSL_SESS_CACHE_CLIENT); |
| 554 | } |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 555 | |
| 556 | ret = 1; |
| 557 | /* s->server=0; */ |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 558 | |
| 559 | if (cb != NULL) { |
| 560 | cb(s, SSL_CB_HANDSHAKE_DONE, 1); |
| 561 | } |
| 562 | |
| 563 | goto end; |
| 564 | |
| 565 | default: |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 566 | OPENSSL_PUT_ERROR(SSL, SSL_R_UNKNOWN_STATE); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 567 | ret = -1; |
| 568 | goto end; |
| 569 | } |
| 570 | |
| 571 | if (!s->s3->tmp.reuse_message && !skip) { |
| 572 | if (cb != NULL && s->state != state) { |
| 573 | new_state = s->state; |
| 574 | s->state = state; |
| 575 | cb(s, SSL_CB_CONNECT_LOOP, 1); |
| 576 | s->state = new_state; |
| 577 | } |
| 578 | } |
| 579 | skip = 0; |
| 580 | } |
| 581 | |
| 582 | end: |
| 583 | s->in_handshake--; |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 584 | BUF_MEM_free(buf); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 585 | if (cb != NULL) { |
| 586 | cb(s, SSL_CB_CONNECT_EXIT, ret); |
| 587 | } |
| 588 | return ret; |
| 589 | } |
| 590 | |
Kenny Root | e99801b | 2015-11-06 15:31:15 -0800 | [diff] [blame] | 591 | static int ssl3_write_client_cipher_list(SSL *ssl, CBB *out) { |
| 592 | /* Prepare disabled cipher masks. */ |
| 593 | ssl_set_client_disabled(ssl); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 594 | |
Kenny Root | e99801b | 2015-11-06 15:31:15 -0800 | [diff] [blame] | 595 | CBB child; |
| 596 | if (!CBB_add_u16_length_prefixed(out, &child)) { |
| 597 | return 0; |
Adam Langley | fdeb488 | 2015-10-30 13:15:30 -0700 | [diff] [blame] | 598 | } |
| 599 | |
Kenny Root | e99801b | 2015-11-06 15:31:15 -0800 | [diff] [blame] | 600 | STACK_OF(SSL_CIPHER) *ciphers = SSL_get_ciphers(ssl); |
| 601 | |
| 602 | int any_enabled = 0; |
| 603 | size_t i; |
| 604 | for (i = 0; i < sk_SSL_CIPHER_num(ciphers); i++) { |
| 605 | const SSL_CIPHER *cipher = sk_SSL_CIPHER_value(ciphers, i); |
| 606 | /* Skip disabled ciphers */ |
Adam Langley | fad6327 | 2015-11-12 12:15:39 -0800 | [diff] [blame] | 607 | if ((cipher->algorithm_mkey & ssl->cert->mask_k) || |
| 608 | (cipher->algorithm_auth & ssl->cert->mask_a)) { |
| 609 | continue; |
| 610 | } |
| 611 | if (SSL_CIPHER_get_min_version(cipher) > |
| 612 | ssl3_version_from_wire(ssl, ssl->client_version)) { |
Kenny Root | e99801b | 2015-11-06 15:31:15 -0800 | [diff] [blame] | 613 | continue; |
| 614 | } |
| 615 | any_enabled = 1; |
| 616 | if (!CBB_add_u16(&child, ssl_cipher_get_value(cipher))) { |
| 617 | return 0; |
| 618 | } |
| 619 | } |
| 620 | |
| 621 | /* If all ciphers were disabled, return the error to the caller. */ |
| 622 | if (!any_enabled) { |
| 623 | OPENSSL_PUT_ERROR(SSL, SSL_R_NO_CIPHERS_AVAILABLE); |
| 624 | return 0; |
| 625 | } |
| 626 | |
| 627 | /* For SSLv3, the SCSV is added. Otherwise the renegotiation extension is |
| 628 | * added. */ |
| 629 | if (ssl->client_version == SSL3_VERSION && |
| 630 | !ssl->s3->initial_handshake_complete) { |
| 631 | if (!CBB_add_u16(&child, SSL3_CK_SCSV & 0xffff)) { |
| 632 | return 0; |
| 633 | } |
| 634 | /* The renegotiation extension is required to be at index zero. */ |
| 635 | ssl->s3->tmp.extensions.sent |= (1u << 0); |
| 636 | } |
| 637 | |
| 638 | if ((ssl->mode & SSL_MODE_SEND_FALLBACK_SCSV) && |
| 639 | !CBB_add_u16(&child, SSL3_CK_FALLBACK_SCSV & 0xffff)) { |
| 640 | return 0; |
| 641 | } |
| 642 | |
| 643 | return CBB_flush(out); |
| 644 | } |
| 645 | |
| 646 | int ssl3_send_client_hello(SSL *ssl) { |
| 647 | if (ssl->state == SSL3_ST_CW_CLNT_HELLO_B) { |
| 648 | return ssl_do_write(ssl); |
| 649 | } |
| 650 | |
Adam Langley | fad6327 | 2015-11-12 12:15:39 -0800 | [diff] [blame] | 651 | /* In DTLS, reset the handshake buffer each time a new ClientHello is |
| 652 | * assembled. We may send multiple if we receive HelloVerifyRequest. */ |
| 653 | if (SSL_IS_DTLS(ssl) && !ssl3_init_handshake_buffer(ssl)) { |
| 654 | OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR); |
| 655 | return -1; |
| 656 | } |
| 657 | |
Kenny Root | e99801b | 2015-11-06 15:31:15 -0800 | [diff] [blame] | 658 | CBB cbb; |
| 659 | CBB_zero(&cbb); |
| 660 | |
| 661 | assert(ssl->state == SSL3_ST_CW_CLNT_HELLO_A); |
| 662 | if (!ssl->s3->have_version) { |
| 663 | uint16_t max_version = ssl3_get_max_client_version(ssl); |
| 664 | /* Disabling all versions is silly: return an error. */ |
| 665 | if (max_version == 0) { |
| 666 | OPENSSL_PUT_ERROR(SSL, SSL_R_WRONG_SSL_VERSION); |
| 667 | goto err; |
| 668 | } |
| 669 | |
| 670 | ssl->version = max_version; |
| 671 | /* Only set |ssl->client_version| on the initial handshake. Renegotiations, |
| 672 | * although locked to a version, reuse the value. When using the plain RSA |
| 673 | * key exchange, the ClientHello version is checked in the premaster secret. |
| 674 | * Some servers fail when this value changes. */ |
| 675 | ssl->client_version = max_version; |
| 676 | } |
| 677 | |
| 678 | /* If the configured session has expired or was created at a version higher |
| 679 | * than our maximum version, drop it. */ |
| 680 | if (ssl->session != NULL && |
| 681 | (ssl->session->session_id_length == 0 || ssl->session->not_resumable || |
| 682 | ssl->session->timeout < (long)(time(NULL) - ssl->session->time) || |
| 683 | (!SSL_IS_DTLS(ssl) && ssl->session->ssl_version > ssl->version) || |
| 684 | (SSL_IS_DTLS(ssl) && ssl->session->ssl_version < ssl->version))) { |
| 685 | SSL_set_session(ssl, NULL); |
| 686 | } |
| 687 | |
| 688 | /* If resending the ClientHello in DTLS after a HelloVerifyRequest, don't |
| 689 | * renegerate the client_random. The random must be reused. */ |
| 690 | if ((!SSL_IS_DTLS(ssl) || !ssl->d1->send_cookie) && |
| 691 | !ssl_fill_hello_random(ssl->s3->client_random, |
| 692 | sizeof(ssl->s3->client_random), 0 /* client */)) { |
| 693 | goto err; |
| 694 | } |
| 695 | |
| 696 | /* Renegotiations do not participate in session resumption. */ |
| 697 | int has_session = ssl->session != NULL && |
| 698 | !ssl->s3->initial_handshake_complete; |
| 699 | |
| 700 | CBB child; |
| 701 | if (!CBB_init_fixed(&cbb, ssl_handshake_start(ssl), |
| 702 | ssl->init_buf->max - SSL_HM_HEADER_LENGTH(ssl)) || |
| 703 | !CBB_add_u16(&cbb, ssl->client_version) || |
| 704 | !CBB_add_bytes(&cbb, ssl->s3->client_random, SSL3_RANDOM_SIZE) || |
| 705 | !CBB_add_u8_length_prefixed(&cbb, &child) || |
| 706 | (has_session && |
| 707 | !CBB_add_bytes(&child, ssl->session->session_id, |
| 708 | ssl->session->session_id_length))) { |
| 709 | goto err; |
| 710 | } |
| 711 | |
| 712 | if (SSL_IS_DTLS(ssl)) { |
| 713 | if (!CBB_add_u8_length_prefixed(&cbb, &child) || |
| 714 | !CBB_add_bytes(&child, ssl->d1->cookie, ssl->d1->cookie_len)) { |
| 715 | goto err; |
| 716 | } |
| 717 | } |
| 718 | |
| 719 | size_t length; |
| 720 | if (!ssl3_write_client_cipher_list(ssl, &cbb) || |
| 721 | !CBB_add_u8(&cbb, 1 /* one compression method */) || |
| 722 | !CBB_add_u8(&cbb, 0 /* null compression */) || |
| 723 | !ssl_add_clienthello_tlsext(ssl, &cbb, |
| 724 | CBB_len(&cbb) + SSL_HM_HEADER_LENGTH(ssl)) || |
| 725 | !CBB_finish(&cbb, NULL, &length) || |
| 726 | !ssl_set_handshake_header(ssl, SSL3_MT_CLIENT_HELLO, length)) { |
| 727 | goto err; |
| 728 | } |
| 729 | |
| 730 | ssl->state = SSL3_ST_CW_CLNT_HELLO_B; |
| 731 | return ssl_do_write(ssl); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 732 | |
| 733 | err: |
Kenny Root | e99801b | 2015-11-06 15:31:15 -0800 | [diff] [blame] | 734 | CBB_cleanup(&cbb); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 735 | return -1; |
| 736 | } |
| 737 | |
| 738 | int ssl3_get_server_hello(SSL *s) { |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 739 | STACK_OF(SSL_CIPHER) *sk; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 740 | const SSL_CIPHER *c; |
| 741 | CERT *ct = s->cert; |
| 742 | int al = SSL_AD_INTERNAL_ERROR, ok; |
| 743 | long n; |
| 744 | CBS server_hello, server_random, session_id; |
| 745 | uint16_t server_version, cipher_suite; |
| 746 | uint8_t compression_method; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 747 | |
| 748 | n = s->method->ssl_get_message(s, SSL3_ST_CR_SRVR_HELLO_A, |
| 749 | SSL3_ST_CR_SRVR_HELLO_B, SSL3_MT_SERVER_HELLO, |
| 750 | 20000, /* ?? */ |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 751 | ssl_hash_message, &ok); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 752 | |
| 753 | if (!ok) { |
| 754 | uint32_t err = ERR_peek_error(); |
| 755 | if (ERR_GET_LIB(err) == ERR_LIB_SSL && |
| 756 | ERR_GET_REASON(err) == SSL_R_SSLV3_ALERT_HANDSHAKE_FAILURE) { |
| 757 | /* Add a dedicated error code to the queue for a handshake_failure alert |
| 758 | * in response to ClientHello. This matches NSS's client behavior and |
| 759 | * gives a better error on a (probable) failure to negotiate initial |
| 760 | * parameters. Note: this error code comes after the original one. |
| 761 | * |
| 762 | * See https://crbug.com/446505. */ |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 763 | OPENSSL_PUT_ERROR(SSL, SSL_R_HANDSHAKE_FAILURE_ON_CLIENT_HELLO); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 764 | } |
| 765 | return n; |
| 766 | } |
| 767 | |
| 768 | CBS_init(&server_hello, s->init_msg, n); |
| 769 | |
| 770 | if (!CBS_get_u16(&server_hello, &server_version) || |
| 771 | !CBS_get_bytes(&server_hello, &server_random, SSL3_RANDOM_SIZE) || |
| 772 | !CBS_get_u8_length_prefixed(&server_hello, &session_id) || |
| 773 | CBS_len(&session_id) > SSL3_SESSION_ID_SIZE || |
| 774 | !CBS_get_u16(&server_hello, &cipher_suite) || |
| 775 | !CBS_get_u8(&server_hello, &compression_method)) { |
| 776 | al = SSL_AD_DECODE_ERROR; |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 777 | OPENSSL_PUT_ERROR(SSL, SSL_R_DECODE_ERROR); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 778 | goto f_err; |
| 779 | } |
| 780 | |
Adam Langley | f4e4272 | 2015-06-04 17:45:09 -0700 | [diff] [blame] | 781 | assert(s->s3->have_version == s->s3->initial_handshake_complete); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 782 | if (!s->s3->have_version) { |
| 783 | if (!ssl3_is_version_enabled(s, server_version)) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 784 | OPENSSL_PUT_ERROR(SSL, SSL_R_UNSUPPORTED_PROTOCOL); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 785 | s->version = server_version; |
| 786 | /* Mark the version as fixed so the record-layer version is not clamped |
| 787 | * to TLS 1.0. */ |
| 788 | s->s3->have_version = 1; |
| 789 | al = SSL_AD_PROTOCOL_VERSION; |
| 790 | goto f_err; |
| 791 | } |
| 792 | s->version = server_version; |
| 793 | s->enc_method = ssl3_get_enc_method(server_version); |
| 794 | assert(s->enc_method != NULL); |
| 795 | /* At this point, the connection's version is known and s->version is |
| 796 | * fixed. Begin enforcing the record-layer version. */ |
| 797 | s->s3->have_version = 1; |
| 798 | } else if (server_version != s->version) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 799 | OPENSSL_PUT_ERROR(SSL, SSL_R_WRONG_SSL_VERSION); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 800 | al = SSL_AD_PROTOCOL_VERSION; |
| 801 | goto f_err; |
| 802 | } |
| 803 | |
| 804 | /* Copy over the server random. */ |
| 805 | memcpy(s->s3->server_random, CBS_data(&server_random), SSL3_RANDOM_SIZE); |
| 806 | |
| 807 | assert(s->session == NULL || s->session->session_id_length > 0); |
Adam Langley | f4e4272 | 2015-06-04 17:45:09 -0700 | [diff] [blame] | 808 | if (!s->s3->initial_handshake_complete && s->session != NULL && |
| 809 | CBS_mem_equal(&session_id, s->session->session_id, |
| 810 | s->session->session_id_length)) { |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 811 | if (s->sid_ctx_length != s->session->sid_ctx_length || |
| 812 | memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) { |
| 813 | /* actually a client application bug */ |
| 814 | al = SSL_AD_ILLEGAL_PARAMETER; |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 815 | OPENSSL_PUT_ERROR(SSL, |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 816 | SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); |
| 817 | goto f_err; |
| 818 | } |
| 819 | s->hit = 1; |
| 820 | } else { |
| 821 | /* The session wasn't resumed. Create a fresh SSL_SESSION to |
| 822 | * fill out. */ |
| 823 | s->hit = 0; |
Kenny Root | e99801b | 2015-11-06 15:31:15 -0800 | [diff] [blame] | 824 | if (!ssl_get_new_session(s, 0 /* client */)) { |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 825 | goto f_err; |
| 826 | } |
| 827 | /* Note: session_id could be empty. */ |
| 828 | s->session->session_id_length = CBS_len(&session_id); |
| 829 | memcpy(s->session->session_id, CBS_data(&session_id), CBS_len(&session_id)); |
| 830 | } |
| 831 | |
Adam Langley | f4e4272 | 2015-06-04 17:45:09 -0700 | [diff] [blame] | 832 | c = SSL_get_cipher_by_value(cipher_suite); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 833 | if (c == NULL) { |
| 834 | /* unknown cipher */ |
| 835 | al = SSL_AD_ILLEGAL_PARAMETER; |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 836 | OPENSSL_PUT_ERROR(SSL, SSL_R_UNKNOWN_CIPHER_RETURNED); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 837 | goto f_err; |
| 838 | } |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 839 | /* If the cipher is disabled then we didn't sent it in the ClientHello, so if |
| 840 | * the server selected it, it's an error. */ |
Adam Langley | fad6327 | 2015-11-12 12:15:39 -0800 | [diff] [blame] | 841 | if ((c->algorithm_mkey & ct->mask_k) || |
| 842 | (c->algorithm_auth & ct->mask_a) || |
| 843 | SSL_CIPHER_get_min_version(c) > ssl3_version_from_wire(s, s->version)) { |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 844 | al = SSL_AD_ILLEGAL_PARAMETER; |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 845 | OPENSSL_PUT_ERROR(SSL, SSL_R_WRONG_CIPHER_RETURNED); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 846 | goto f_err; |
| 847 | } |
| 848 | |
| 849 | sk = ssl_get_ciphers_by_id(s); |
| 850 | if (!sk_SSL_CIPHER_find(sk, NULL, c)) { |
| 851 | /* we did not say we would use this cipher */ |
| 852 | al = SSL_AD_ILLEGAL_PARAMETER; |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 853 | OPENSSL_PUT_ERROR(SSL, SSL_R_WRONG_CIPHER_RETURNED); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 854 | goto f_err; |
| 855 | } |
| 856 | |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 857 | if (s->hit) { |
| 858 | if (s->session->cipher != c) { |
| 859 | al = SSL_AD_ILLEGAL_PARAMETER; |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 860 | OPENSSL_PUT_ERROR(SSL, SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 861 | goto f_err; |
| 862 | } |
| 863 | if (s->session->ssl_version != s->version) { |
| 864 | al = SSL_AD_ILLEGAL_PARAMETER; |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 865 | OPENSSL_PUT_ERROR(SSL, SSL_R_OLD_SESSION_VERSION_NOT_RETURNED); |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 866 | goto f_err; |
| 867 | } |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 868 | } |
| 869 | s->s3->tmp.new_cipher = c; |
| 870 | |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 871 | /* Now that the cipher is known, initialize the handshake hash. */ |
| 872 | if (!ssl3_init_handshake_hash(s)) { |
| 873 | goto f_err; |
| 874 | } |
| 875 | |
Adam Langley | f4e4272 | 2015-06-04 17:45:09 -0700 | [diff] [blame] | 876 | /* If doing a full handshake with TLS 1.2, the server may request a client |
| 877 | * certificate which requires hashing the handshake transcript under a |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 878 | * different hash. Otherwise, the handshake buffer may be released. */ |
| 879 | if (!SSL_USE_SIGALGS(s) || s->hit) { |
| 880 | ssl3_free_handshake_buffer(s); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 881 | } |
| 882 | |
| 883 | /* Only the NULL compression algorithm is supported. */ |
| 884 | if (compression_method != 0) { |
| 885 | al = SSL_AD_ILLEGAL_PARAMETER; |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 886 | OPENSSL_PUT_ERROR(SSL, SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 887 | goto f_err; |
| 888 | } |
| 889 | |
| 890 | /* TLS extensions */ |
| 891 | if (!ssl_parse_serverhello_tlsext(s, &server_hello)) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 892 | OPENSSL_PUT_ERROR(SSL, SSL_R_PARSE_TLSEXT); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 893 | goto err; |
| 894 | } |
| 895 | |
| 896 | /* There should be nothing left over in the record. */ |
| 897 | if (CBS_len(&server_hello) != 0) { |
| 898 | /* wrong packet length */ |
| 899 | al = SSL_AD_DECODE_ERROR; |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 900 | OPENSSL_PUT_ERROR(SSL, SSL_R_BAD_PACKET_LENGTH); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 901 | goto f_err; |
| 902 | } |
| 903 | |
Adam Langley | f4e4272 | 2015-06-04 17:45:09 -0700 | [diff] [blame] | 904 | if (s->hit && |
| 905 | s->s3->tmp.extended_master_secret != s->session->extended_master_secret) { |
| 906 | al = SSL_AD_HANDSHAKE_FAILURE; |
| 907 | if (s->session->extended_master_secret) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 908 | OPENSSL_PUT_ERROR(SSL, SSL_R_RESUMED_EMS_SESSION_WITHOUT_EMS_EXTENSION); |
Adam Langley | f4e4272 | 2015-06-04 17:45:09 -0700 | [diff] [blame] | 909 | } else { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 910 | OPENSSL_PUT_ERROR(SSL, SSL_R_RESUMED_NON_EMS_SESSION_WITH_EMS_EXTENSION); |
Adam Langley | f4e4272 | 2015-06-04 17:45:09 -0700 | [diff] [blame] | 911 | } |
| 912 | goto f_err; |
| 913 | } |
| 914 | |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 915 | return 1; |
| 916 | |
| 917 | f_err: |
| 918 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
| 919 | err: |
| 920 | return -1; |
| 921 | } |
| 922 | |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 923 | /* ssl3_check_certificate_for_cipher returns one if |leaf| is a suitable server |
| 924 | * certificate type for |cipher|. Otherwise, it returns zero and pushes an error |
| 925 | * on the error queue. */ |
| 926 | static int ssl3_check_certificate_for_cipher(X509 *leaf, |
| 927 | const SSL_CIPHER *cipher) { |
| 928 | int ret = 0; |
| 929 | EVP_PKEY *pkey = X509_get_pubkey(leaf); |
| 930 | if (pkey == NULL) { |
| 931 | goto err; |
| 932 | } |
| 933 | |
| 934 | /* Check the certificate's type matches the cipher. */ |
| 935 | int expected_type = ssl_cipher_get_key_type(cipher); |
| 936 | assert(expected_type != EVP_PKEY_NONE); |
| 937 | if (pkey->type != expected_type) { |
| 938 | OPENSSL_PUT_ERROR(SSL, SSL_R_WRONG_CERTIFICATE_TYPE); |
| 939 | goto err; |
| 940 | } |
| 941 | |
| 942 | /* TODO(davidben): This behavior is preserved from upstream. Should key usages |
| 943 | * be checked in other cases as well? */ |
| 944 | if (cipher->algorithm_auth & SSL_aECDSA) { |
| 945 | /* This call populates the ex_flags field correctly */ |
| 946 | X509_check_purpose(leaf, -1, 0); |
| 947 | if ((leaf->ex_flags & EXFLAG_KUSAGE) && |
| 948 | !(leaf->ex_kusage & X509v3_KU_DIGITAL_SIGNATURE)) { |
| 949 | OPENSSL_PUT_ERROR(SSL, SSL_R_ECC_CERT_NOT_FOR_SIGNING); |
| 950 | goto err; |
| 951 | } |
| 952 | } |
| 953 | |
| 954 | ret = 1; |
| 955 | |
| 956 | err: |
| 957 | EVP_PKEY_free(pkey); |
| 958 | return ret; |
| 959 | } |
| 960 | |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 961 | int ssl3_get_server_certificate(SSL *s) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 962 | int al, ok, ret = -1; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 963 | unsigned long n; |
| 964 | X509 *x = NULL; |
| 965 | STACK_OF(X509) *sk = NULL; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 966 | EVP_PKEY *pkey = NULL; |
| 967 | CBS cbs, certificate_list; |
| 968 | const uint8_t *data; |
| 969 | |
| 970 | n = s->method->ssl_get_message(s, SSL3_ST_CR_CERT_A, SSL3_ST_CR_CERT_B, |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 971 | SSL3_MT_CERTIFICATE, (long)s->max_cert_list, |
| 972 | ssl_hash_message, &ok); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 973 | |
| 974 | if (!ok) { |
| 975 | return n; |
| 976 | } |
| 977 | |
| 978 | CBS_init(&cbs, s->init_msg, n); |
| 979 | |
| 980 | sk = sk_X509_new_null(); |
| 981 | if (sk == NULL) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 982 | OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 983 | goto err; |
| 984 | } |
| 985 | |
| 986 | if (!CBS_get_u24_length_prefixed(&cbs, &certificate_list) || |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 987 | CBS_len(&certificate_list) == 0 || |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 988 | CBS_len(&cbs) != 0) { |
| 989 | al = SSL_AD_DECODE_ERROR; |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 990 | OPENSSL_PUT_ERROR(SSL, SSL_R_DECODE_ERROR); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 991 | goto f_err; |
| 992 | } |
| 993 | |
| 994 | while (CBS_len(&certificate_list) > 0) { |
| 995 | CBS certificate; |
| 996 | if (!CBS_get_u24_length_prefixed(&certificate_list, &certificate)) { |
| 997 | al = SSL_AD_DECODE_ERROR; |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 998 | OPENSSL_PUT_ERROR(SSL, SSL_R_CERT_LENGTH_MISMATCH); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 999 | goto f_err; |
| 1000 | } |
| 1001 | data = CBS_data(&certificate); |
| 1002 | x = d2i_X509(NULL, &data, CBS_len(&certificate)); |
| 1003 | if (x == NULL) { |
| 1004 | al = SSL_AD_BAD_CERTIFICATE; |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1005 | OPENSSL_PUT_ERROR(SSL, ERR_R_ASN1_LIB); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1006 | goto f_err; |
| 1007 | } |
| 1008 | if (data != CBS_data(&certificate) + CBS_len(&certificate)) { |
| 1009 | al = SSL_AD_DECODE_ERROR; |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1010 | OPENSSL_PUT_ERROR(SSL, SSL_R_CERT_LENGTH_MISMATCH); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1011 | goto f_err; |
| 1012 | } |
| 1013 | if (!sk_X509_push(sk, x)) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1014 | OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1015 | goto err; |
| 1016 | } |
| 1017 | x = NULL; |
| 1018 | } |
| 1019 | |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1020 | X509 *leaf = sk_X509_value(sk, 0); |
| 1021 | if (!ssl3_check_certificate_for_cipher(leaf, s->s3->tmp.new_cipher)) { |
Kenny Root | a04d78d | 2015-09-25 00:26:37 +0000 | [diff] [blame] | 1022 | al = SSL_AD_ILLEGAL_PARAMETER; |
Kenny Root | a04d78d | 2015-09-25 00:26:37 +0000 | [diff] [blame] | 1023 | goto f_err; |
| 1024 | } |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1025 | |
| 1026 | /* NOTE: Unlike the server half, the client's copy of |cert_chain| includes |
| 1027 | * the leaf. */ |
| 1028 | sk_X509_pop_free(s->session->cert_chain, X509_free); |
| 1029 | s->session->cert_chain = sk; |
| 1030 | sk = NULL; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1031 | |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 1032 | X509_free(s->session->peer); |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1033 | s->session->peer = X509_up_ref(leaf); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1034 | |
| 1035 | s->session->verify_result = s->verify_result; |
| 1036 | |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1037 | ret = 1; |
| 1038 | |
| 1039 | if (0) { |
| 1040 | f_err: |
| 1041 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
| 1042 | } |
| 1043 | |
| 1044 | err: |
| 1045 | EVP_PKEY_free(pkey); |
| 1046 | X509_free(x); |
| 1047 | sk_X509_pop_free(sk, X509_free); |
| 1048 | return ret; |
| 1049 | } |
| 1050 | |
| 1051 | int ssl3_get_server_key_exchange(SSL *s) { |
| 1052 | EVP_MD_CTX md_ctx; |
| 1053 | int al, ok; |
| 1054 | long n, alg_k, alg_a; |
| 1055 | EVP_PKEY *pkey = NULL; |
| 1056 | const EVP_MD *md = NULL; |
| 1057 | RSA *rsa = NULL; |
| 1058 | DH *dh = NULL; |
| 1059 | EC_KEY *ecdh = NULL; |
| 1060 | BN_CTX *bn_ctx = NULL; |
| 1061 | EC_POINT *srvr_ecpoint = NULL; |
| 1062 | CBS server_key_exchange, server_key_exchange_orig, parameter; |
| 1063 | |
| 1064 | /* use same message size as in ssl3_get_certificate_request() as |
| 1065 | * ServerKeyExchange message may be skipped */ |
| 1066 | n = s->method->ssl_get_message(s, SSL3_ST_CR_KEY_EXCH_A, |
| 1067 | SSL3_ST_CR_KEY_EXCH_B, -1, s->max_cert_list, |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 1068 | ssl_hash_message, &ok); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1069 | if (!ok) { |
| 1070 | return n; |
| 1071 | } |
| 1072 | |
| 1073 | if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE) { |
| 1074 | if (ssl_cipher_requires_server_key_exchange(s->s3->tmp.new_cipher)) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1075 | OPENSSL_PUT_ERROR(SSL, SSL_R_UNEXPECTED_MESSAGE); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1076 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE); |
| 1077 | return -1; |
| 1078 | } |
| 1079 | |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1080 | /* In plain PSK ciphersuite, ServerKeyExchange may be omitted to send no |
| 1081 | * identity hint. */ |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1082 | if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aPSK) { |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1083 | /* TODO(davidben): This should be reset in one place with the rest of the |
| 1084 | * handshake state. */ |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 1085 | OPENSSL_free(s->s3->tmp.peer_psk_identity_hint); |
| 1086 | s->s3->tmp.peer_psk_identity_hint = NULL; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1087 | } |
| 1088 | s->s3->tmp.reuse_message = 1; |
| 1089 | return 1; |
| 1090 | } |
| 1091 | |
| 1092 | /* Retain a copy of the original CBS to compute the signature over. */ |
| 1093 | CBS_init(&server_key_exchange, s->init_msg, n); |
| 1094 | server_key_exchange_orig = server_key_exchange; |
| 1095 | |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1096 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
| 1097 | alg_a = s->s3->tmp.new_cipher->algorithm_auth; |
| 1098 | EVP_MD_CTX_init(&md_ctx); |
| 1099 | |
| 1100 | if (alg_a & SSL_aPSK) { |
| 1101 | CBS psk_identity_hint; |
| 1102 | |
| 1103 | /* Each of the PSK key exchanges begins with a psk_identity_hint. */ |
| 1104 | if (!CBS_get_u16_length_prefixed(&server_key_exchange, |
| 1105 | &psk_identity_hint)) { |
| 1106 | al = SSL_AD_DECODE_ERROR; |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1107 | OPENSSL_PUT_ERROR(SSL, SSL_R_DECODE_ERROR); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1108 | goto f_err; |
| 1109 | } |
| 1110 | |
| 1111 | /* Store PSK identity hint for later use, hint is used in |
| 1112 | * ssl3_send_client_key_exchange. Assume that the maximum length of a PSK |
| 1113 | * identity hint can be as long as the maximum length of a PSK identity. |
| 1114 | * Also do not allow NULL characters; identities are saved as C strings. |
| 1115 | * |
| 1116 | * TODO(davidben): Should invalid hints be ignored? It's a hint rather than |
| 1117 | * a specific identity. */ |
| 1118 | if (CBS_len(&psk_identity_hint) > PSK_MAX_IDENTITY_LEN || |
| 1119 | CBS_contains_zero_byte(&psk_identity_hint)) { |
| 1120 | al = SSL_AD_HANDSHAKE_FAILURE; |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1121 | OPENSSL_PUT_ERROR(SSL, SSL_R_DATA_LENGTH_TOO_LONG); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1122 | goto f_err; |
| 1123 | } |
| 1124 | |
| 1125 | /* Save the identity hint as a C string. */ |
| 1126 | if (!CBS_strdup(&psk_identity_hint, &s->s3->tmp.peer_psk_identity_hint)) { |
| 1127 | al = SSL_AD_INTERNAL_ERROR; |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1128 | OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1129 | goto f_err; |
| 1130 | } |
| 1131 | } |
| 1132 | |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 1133 | if (alg_k & SSL_kDHE) { |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1134 | CBS dh_p, dh_g, dh_Ys; |
| 1135 | |
| 1136 | if (!CBS_get_u16_length_prefixed(&server_key_exchange, &dh_p) || |
| 1137 | CBS_len(&dh_p) == 0 || |
| 1138 | !CBS_get_u16_length_prefixed(&server_key_exchange, &dh_g) || |
| 1139 | CBS_len(&dh_g) == 0 || |
| 1140 | !CBS_get_u16_length_prefixed(&server_key_exchange, &dh_Ys) || |
| 1141 | CBS_len(&dh_Ys) == 0) { |
| 1142 | al = SSL_AD_DECODE_ERROR; |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1143 | OPENSSL_PUT_ERROR(SSL, SSL_R_DECODE_ERROR); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1144 | goto f_err; |
| 1145 | } |
| 1146 | |
| 1147 | dh = DH_new(); |
| 1148 | if (dh == NULL) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1149 | OPENSSL_PUT_ERROR(SSL, ERR_R_DH_LIB); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1150 | goto err; |
| 1151 | } |
| 1152 | |
| 1153 | if ((dh->p = BN_bin2bn(CBS_data(&dh_p), CBS_len(&dh_p), NULL)) == NULL || |
| 1154 | (dh->g = BN_bin2bn(CBS_data(&dh_g), CBS_len(&dh_g), NULL)) == NULL || |
| 1155 | (dh->pub_key = BN_bin2bn(CBS_data(&dh_Ys), CBS_len(&dh_Ys), NULL)) == |
| 1156 | NULL) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1157 | OPENSSL_PUT_ERROR(SSL, ERR_R_BN_LIB); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1158 | goto err; |
| 1159 | } |
| 1160 | |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1161 | s->session->key_exchange_info = DH_num_bits(dh); |
| 1162 | if (s->session->key_exchange_info < 1024) { |
| 1163 | OPENSSL_PUT_ERROR(SSL, SSL_R_BAD_DH_P_LENGTH); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1164 | goto err; |
| 1165 | } |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1166 | DH_free(s->s3->tmp.peer_dh_tmp); |
| 1167 | s->s3->tmp.peer_dh_tmp = dh; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1168 | dh = NULL; |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 1169 | } else if (alg_k & SSL_kECDHE) { |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1170 | uint16_t curve_id; |
| 1171 | int curve_nid = 0; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1172 | const EC_GROUP *group; |
| 1173 | CBS point; |
| 1174 | |
| 1175 | /* Extract elliptic curve parameters and the server's ephemeral ECDH public |
| 1176 | * key. Check curve is one of our preferences, if not server has sent an |
| 1177 | * invalid curve. */ |
| 1178 | if (!tls1_check_curve(s, &server_key_exchange, &curve_id)) { |
| 1179 | al = SSL_AD_DECODE_ERROR; |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1180 | OPENSSL_PUT_ERROR(SSL, SSL_R_WRONG_CURVE); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1181 | goto f_err; |
| 1182 | } |
| 1183 | |
| 1184 | curve_nid = tls1_ec_curve_id2nid(curve_id); |
| 1185 | if (curve_nid == 0) { |
| 1186 | al = SSL_AD_INTERNAL_ERROR; |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1187 | OPENSSL_PUT_ERROR(SSL, SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1188 | goto f_err; |
| 1189 | } |
| 1190 | |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 1191 | ecdh = EC_KEY_new_by_curve_name(curve_nid); |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1192 | s->session->key_exchange_info = curve_id; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1193 | if (ecdh == NULL) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1194 | OPENSSL_PUT_ERROR(SSL, ERR_R_EC_LIB); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1195 | goto err; |
| 1196 | } |
| 1197 | |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1198 | group = EC_KEY_get0_group(ecdh); |
| 1199 | |
| 1200 | /* Next, get the encoded ECPoint */ |
| 1201 | if (!CBS_get_u8_length_prefixed(&server_key_exchange, &point)) { |
| 1202 | al = SSL_AD_DECODE_ERROR; |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1203 | OPENSSL_PUT_ERROR(SSL, SSL_R_DECODE_ERROR); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1204 | goto f_err; |
| 1205 | } |
| 1206 | |
| 1207 | if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) || |
| 1208 | ((bn_ctx = BN_CTX_new()) == NULL)) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1209 | OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1210 | goto err; |
| 1211 | } |
| 1212 | |
| 1213 | if (!EC_POINT_oct2point(group, srvr_ecpoint, CBS_data(&point), |
| 1214 | CBS_len(&point), bn_ctx)) { |
| 1215 | al = SSL_AD_DECODE_ERROR; |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1216 | OPENSSL_PUT_ERROR(SSL, SSL_R_BAD_ECPOINT); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1217 | goto f_err; |
| 1218 | } |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1219 | EC_KEY_set_public_key(ecdh, srvr_ecpoint); |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1220 | EC_KEY_free(s->s3->tmp.peer_ecdh_tmp); |
| 1221 | s->s3->tmp.peer_ecdh_tmp = ecdh; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1222 | ecdh = NULL; |
| 1223 | BN_CTX_free(bn_ctx); |
| 1224 | bn_ctx = NULL; |
| 1225 | EC_POINT_free(srvr_ecpoint); |
| 1226 | srvr_ecpoint = NULL; |
| 1227 | } else if (!(alg_k & SSL_kPSK)) { |
| 1228 | al = SSL_AD_UNEXPECTED_MESSAGE; |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1229 | OPENSSL_PUT_ERROR(SSL, SSL_R_UNEXPECTED_MESSAGE); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1230 | goto f_err; |
| 1231 | } |
| 1232 | |
| 1233 | /* At this point, |server_key_exchange| contains the signature, if any, while |
| 1234 | * |server_key_exchange_orig| contains the entire message. From that, derive |
| 1235 | * a CBS containing just the parameter. */ |
| 1236 | CBS_init(¶meter, CBS_data(&server_key_exchange_orig), |
| 1237 | CBS_len(&server_key_exchange_orig) - CBS_len(&server_key_exchange)); |
| 1238 | |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1239 | /* ServerKeyExchange should be signed by the server's public key. */ |
| 1240 | if (ssl_cipher_has_server_public_key(s->s3->tmp.new_cipher)) { |
| 1241 | pkey = X509_get_pubkey(s->session->peer); |
| 1242 | if (pkey == NULL) { |
| 1243 | goto err; |
| 1244 | } |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1245 | |
| 1246 | if (SSL_USE_SIGALGS(s)) { |
Adam Langley | fad6327 | 2015-11-12 12:15:39 -0800 | [diff] [blame] | 1247 | uint8_t hash, signature; |
| 1248 | if (!CBS_get_u8(&server_key_exchange, &hash) || |
| 1249 | !CBS_get_u8(&server_key_exchange, &signature)) { |
| 1250 | al = SSL_AD_DECODE_ERROR; |
| 1251 | OPENSSL_PUT_ERROR(SSL, SSL_R_DECODE_ERROR); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1252 | goto f_err; |
| 1253 | } |
Adam Langley | fad6327 | 2015-11-12 12:15:39 -0800 | [diff] [blame] | 1254 | if (!tls12_check_peer_sigalg(s, &md, &al, hash, signature, pkey)) { |
| 1255 | goto f_err; |
| 1256 | } |
| 1257 | s->s3->tmp.server_key_exchange_hash = hash; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1258 | } else if (pkey->type == EVP_PKEY_RSA) { |
| 1259 | md = EVP_md5_sha1(); |
| 1260 | } else { |
| 1261 | md = EVP_sha1(); |
| 1262 | } |
| 1263 | |
| 1264 | /* The last field in |server_key_exchange| is the signature. */ |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1265 | CBS signature; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1266 | if (!CBS_get_u16_length_prefixed(&server_key_exchange, &signature) || |
| 1267 | CBS_len(&server_key_exchange) != 0) { |
| 1268 | al = SSL_AD_DECODE_ERROR; |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1269 | OPENSSL_PUT_ERROR(SSL, SSL_R_DECODE_ERROR); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1270 | goto f_err; |
| 1271 | } |
| 1272 | |
| 1273 | if (!EVP_DigestVerifyInit(&md_ctx, NULL, md, NULL, pkey) || |
| 1274 | !EVP_DigestVerifyUpdate(&md_ctx, s->s3->client_random, |
| 1275 | SSL3_RANDOM_SIZE) || |
| 1276 | !EVP_DigestVerifyUpdate(&md_ctx, s->s3->server_random, |
| 1277 | SSL3_RANDOM_SIZE) || |
| 1278 | !EVP_DigestVerifyUpdate(&md_ctx, CBS_data(¶meter), |
| 1279 | CBS_len(¶meter)) || |
| 1280 | !EVP_DigestVerifyFinal(&md_ctx, CBS_data(&signature), |
| 1281 | CBS_len(&signature))) { |
| 1282 | /* bad signature */ |
| 1283 | al = SSL_AD_DECRYPT_ERROR; |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1284 | OPENSSL_PUT_ERROR(SSL, SSL_R_BAD_SIGNATURE); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1285 | goto f_err; |
| 1286 | } |
| 1287 | } else { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1288 | /* PSK ciphers are the only supported certificate-less ciphers. */ |
| 1289 | assert(alg_a == SSL_aPSK); |
| 1290 | |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1291 | if (CBS_len(&server_key_exchange) > 0) { |
| 1292 | al = SSL_AD_DECODE_ERROR; |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1293 | OPENSSL_PUT_ERROR(SSL, SSL_R_EXTRA_DATA_IN_MESSAGE); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1294 | goto f_err; |
| 1295 | } |
| 1296 | } |
| 1297 | EVP_PKEY_free(pkey); |
| 1298 | EVP_MD_CTX_cleanup(&md_ctx); |
| 1299 | return 1; |
| 1300 | |
| 1301 | f_err: |
| 1302 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
| 1303 | err: |
| 1304 | EVP_PKEY_free(pkey); |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 1305 | RSA_free(rsa); |
| 1306 | DH_free(dh); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1307 | BN_CTX_free(bn_ctx); |
| 1308 | EC_POINT_free(srvr_ecpoint); |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 1309 | EC_KEY_free(ecdh); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1310 | EVP_MD_CTX_cleanup(&md_ctx); |
| 1311 | return -1; |
| 1312 | } |
| 1313 | |
| 1314 | static int ca_dn_cmp(const X509_NAME **a, const X509_NAME **b) { |
| 1315 | return X509_NAME_cmp(*a, *b); |
| 1316 | } |
| 1317 | |
| 1318 | int ssl3_get_certificate_request(SSL *s) { |
| 1319 | int ok, ret = 0; |
| 1320 | unsigned long n; |
| 1321 | X509_NAME *xn = NULL; |
| 1322 | STACK_OF(X509_NAME) *ca_sk = NULL; |
| 1323 | CBS cbs; |
| 1324 | CBS certificate_types; |
| 1325 | CBS certificate_authorities; |
| 1326 | const uint8_t *data; |
| 1327 | |
| 1328 | n = s->method->ssl_get_message(s, SSL3_ST_CR_CERT_REQ_A, |
| 1329 | SSL3_ST_CR_CERT_REQ_B, -1, s->max_cert_list, |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 1330 | ssl_hash_message, &ok); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1331 | |
| 1332 | if (!ok) { |
| 1333 | return n; |
| 1334 | } |
| 1335 | |
| 1336 | s->s3->tmp.cert_req = 0; |
| 1337 | |
| 1338 | if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE) { |
| 1339 | s->s3->tmp.reuse_message = 1; |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1340 | /* If we get here we don't need the handshake buffer as we won't be doing |
| 1341 | * client auth. */ |
| 1342 | ssl3_free_handshake_buffer(s); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1343 | return 1; |
| 1344 | } |
| 1345 | |
| 1346 | if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST) { |
| 1347 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE); |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1348 | OPENSSL_PUT_ERROR(SSL, SSL_R_WRONG_MESSAGE_TYPE); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1349 | goto err; |
| 1350 | } |
| 1351 | |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1352 | CBS_init(&cbs, s->init_msg, n); |
| 1353 | |
| 1354 | ca_sk = sk_X509_NAME_new(ca_dn_cmp); |
| 1355 | if (ca_sk == NULL) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1356 | OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1357 | goto err; |
| 1358 | } |
| 1359 | |
| 1360 | /* get the certificate types */ |
| 1361 | if (!CBS_get_u8_length_prefixed(&cbs, &certificate_types)) { |
| 1362 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1363 | OPENSSL_PUT_ERROR(SSL, SSL_R_DECODE_ERROR); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1364 | goto err; |
| 1365 | } |
| 1366 | |
| 1367 | if (!CBS_stow(&certificate_types, &s->s3->tmp.certificate_types, |
| 1368 | &s->s3->tmp.num_certificate_types)) { |
| 1369 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); |
| 1370 | goto err; |
| 1371 | } |
| 1372 | |
| 1373 | if (SSL_USE_SIGALGS(s)) { |
| 1374 | CBS supported_signature_algorithms; |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1375 | if (!CBS_get_u16_length_prefixed(&cbs, &supported_signature_algorithms) || |
| 1376 | !tls1_parse_peer_sigalgs(s, &supported_signature_algorithms)) { |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1377 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1378 | OPENSSL_PUT_ERROR(SSL, SSL_R_DECODE_ERROR); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1379 | goto err; |
| 1380 | } |
| 1381 | } |
| 1382 | |
| 1383 | /* get the CA RDNs */ |
| 1384 | if (!CBS_get_u16_length_prefixed(&cbs, &certificate_authorities)) { |
| 1385 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1386 | OPENSSL_PUT_ERROR(SSL, SSL_R_LENGTH_MISMATCH); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1387 | goto err; |
| 1388 | } |
| 1389 | |
| 1390 | while (CBS_len(&certificate_authorities) > 0) { |
| 1391 | CBS distinguished_name; |
| 1392 | if (!CBS_get_u16_length_prefixed(&certificate_authorities, |
| 1393 | &distinguished_name)) { |
| 1394 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1395 | OPENSSL_PUT_ERROR(SSL, SSL_R_CA_DN_TOO_LONG); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1396 | goto err; |
| 1397 | } |
| 1398 | |
| 1399 | data = CBS_data(&distinguished_name); |
| 1400 | |
| 1401 | xn = d2i_X509_NAME(NULL, &data, CBS_len(&distinguished_name)); |
| 1402 | if (xn == NULL) { |
| 1403 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1404 | OPENSSL_PUT_ERROR(SSL, ERR_R_ASN1_LIB); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1405 | goto err; |
| 1406 | } |
| 1407 | |
| 1408 | if (!CBS_skip(&distinguished_name, data - CBS_data(&distinguished_name))) { |
| 1409 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1410 | OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1411 | goto err; |
| 1412 | } |
| 1413 | |
| 1414 | if (CBS_len(&distinguished_name) != 0) { |
| 1415 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1416 | OPENSSL_PUT_ERROR(SSL, SSL_R_CA_DN_LENGTH_MISMATCH); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1417 | goto err; |
| 1418 | } |
| 1419 | |
| 1420 | if (!sk_X509_NAME_push(ca_sk, xn)) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1421 | OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1422 | goto err; |
| 1423 | } |
| 1424 | } |
| 1425 | |
| 1426 | /* we should setup a certificate to return.... */ |
| 1427 | s->s3->tmp.cert_req = 1; |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 1428 | sk_X509_NAME_pop_free(s->s3->tmp.ca_names, X509_NAME_free); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1429 | s->s3->tmp.ca_names = ca_sk; |
| 1430 | ca_sk = NULL; |
| 1431 | |
| 1432 | ret = 1; |
| 1433 | |
| 1434 | err: |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 1435 | sk_X509_NAME_pop_free(ca_sk, X509_NAME_free); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1436 | return ret; |
| 1437 | } |
| 1438 | |
| 1439 | int ssl3_get_new_session_ticket(SSL *s) { |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 1440 | int ok, al; |
Kenny Root | e99801b | 2015-11-06 15:31:15 -0800 | [diff] [blame] | 1441 | long n = s->method->ssl_get_message( |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1442 | s, SSL3_ST_CR_SESSION_TICKET_A, SSL3_ST_CR_SESSION_TICKET_B, |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 1443 | SSL3_MT_NEWSESSION_TICKET, 16384, ssl_hash_message, &ok); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1444 | |
| 1445 | if (!ok) { |
| 1446 | return n; |
| 1447 | } |
| 1448 | |
Kenny Root | e99801b | 2015-11-06 15:31:15 -0800 | [diff] [blame] | 1449 | CBS new_session_ticket, ticket; |
| 1450 | uint32_t ticket_lifetime_hint; |
| 1451 | CBS_init(&new_session_ticket, s->init_msg, n); |
| 1452 | if (!CBS_get_u32(&new_session_ticket, &ticket_lifetime_hint) || |
| 1453 | !CBS_get_u16_length_prefixed(&new_session_ticket, &ticket) || |
| 1454 | CBS_len(&new_session_ticket) != 0) { |
| 1455 | al = SSL_AD_DECODE_ERROR; |
| 1456 | OPENSSL_PUT_ERROR(SSL, SSL_R_DECODE_ERROR); |
| 1457 | goto f_err; |
| 1458 | } |
| 1459 | |
| 1460 | if (CBS_len(&ticket) == 0) { |
| 1461 | /* RFC 5077 allows a server to change its mind and send no ticket after |
Adam Langley | fad6327 | 2015-11-12 12:15:39 -0800 | [diff] [blame] | 1462 | * negotiating the extension. The value of |tlsext_ticket_expected| is |
| 1463 | * checked in |ssl_update_cache| so is cleared here to avoid an unnecessary |
| 1464 | * update. */ |
Kenny Root | e99801b | 2015-11-06 15:31:15 -0800 | [diff] [blame] | 1465 | s->tlsext_ticket_expected = 0; |
| 1466 | return 1; |
| 1467 | } |
| 1468 | |
Adam Langley | 56d2503 | 2015-06-23 16:20:13 -0700 | [diff] [blame] | 1469 | if (s->hit) { |
| 1470 | /* The server is sending a new ticket for an existing session. Sessions are |
| 1471 | * immutable once established, so duplicate all but the ticket of the |
| 1472 | * existing session. */ |
| 1473 | uint8_t *bytes; |
| 1474 | size_t bytes_len; |
| 1475 | if (!SSL_SESSION_to_bytes_for_ticket(s->session, &bytes, &bytes_len)) { |
| 1476 | goto err; |
| 1477 | } |
| 1478 | SSL_SESSION *new_session = SSL_SESSION_from_bytes(bytes, bytes_len); |
| 1479 | OPENSSL_free(bytes); |
| 1480 | if (new_session == NULL) { |
| 1481 | /* This should never happen. */ |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1482 | OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR); |
Adam Langley | 56d2503 | 2015-06-23 16:20:13 -0700 | [diff] [blame] | 1483 | goto err; |
| 1484 | } |
Adam Langley | 56d2503 | 2015-06-23 16:20:13 -0700 | [diff] [blame] | 1485 | |
| 1486 | SSL_SESSION_free(s->session); |
| 1487 | s->session = new_session; |
| 1488 | } |
| 1489 | |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1490 | if (!CBS_stow(&ticket, &s->session->tlsext_tick, |
| 1491 | &s->session->tlsext_ticklen)) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1492 | OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1493 | goto err; |
| 1494 | } |
Kenny Root | e99801b | 2015-11-06 15:31:15 -0800 | [diff] [blame] | 1495 | s->session->tlsext_tick_lifetime_hint = ticket_lifetime_hint; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1496 | |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 1497 | /* Generate a session ID for this session based on the session ticket. We use |
| 1498 | * the session ID mechanism for detecting ticket resumption. This also fits in |
| 1499 | * with assumptions elsewhere in OpenSSL.*/ |
| 1500 | if (!EVP_Digest(CBS_data(&ticket), CBS_len(&ticket), s->session->session_id, |
| 1501 | &s->session->session_id_length, EVP_sha256(), NULL)) { |
| 1502 | goto err; |
| 1503 | } |
| 1504 | |
| 1505 | return 1; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1506 | |
| 1507 | f_err: |
| 1508 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
| 1509 | err: |
| 1510 | return -1; |
| 1511 | } |
| 1512 | |
| 1513 | int ssl3_get_cert_status(SSL *s) { |
| 1514 | int ok, al; |
| 1515 | long n; |
| 1516 | CBS certificate_status, ocsp_response; |
| 1517 | uint8_t status_type; |
| 1518 | |
| 1519 | n = s->method->ssl_get_message( |
| 1520 | s, SSL3_ST_CR_CERT_STATUS_A, SSL3_ST_CR_CERT_STATUS_B, |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 1521 | -1, 16384, ssl_hash_message, &ok); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1522 | |
| 1523 | if (!ok) { |
| 1524 | return n; |
| 1525 | } |
| 1526 | |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 1527 | if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_STATUS) { |
| 1528 | /* A server may send status_request in ServerHello and then change |
| 1529 | * its mind about sending CertificateStatus. */ |
| 1530 | s->s3->tmp.reuse_message = 1; |
| 1531 | return 1; |
| 1532 | } |
| 1533 | |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1534 | CBS_init(&certificate_status, s->init_msg, n); |
| 1535 | if (!CBS_get_u8(&certificate_status, &status_type) || |
| 1536 | status_type != TLSEXT_STATUSTYPE_ocsp || |
| 1537 | !CBS_get_u24_length_prefixed(&certificate_status, &ocsp_response) || |
| 1538 | CBS_len(&ocsp_response) == 0 || |
| 1539 | CBS_len(&certificate_status) != 0) { |
| 1540 | al = SSL_AD_DECODE_ERROR; |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1541 | OPENSSL_PUT_ERROR(SSL, SSL_R_DECODE_ERROR); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1542 | goto f_err; |
| 1543 | } |
| 1544 | |
| 1545 | if (!CBS_stow(&ocsp_response, &s->session->ocsp_response, |
| 1546 | &s->session->ocsp_response_length)) { |
| 1547 | al = SSL_AD_INTERNAL_ERROR; |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1548 | OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1549 | goto f_err; |
| 1550 | } |
| 1551 | return 1; |
| 1552 | |
| 1553 | f_err: |
| 1554 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
| 1555 | return -1; |
| 1556 | } |
| 1557 | |
| 1558 | int ssl3_get_server_done(SSL *s) { |
| 1559 | int ok; |
| 1560 | long n; |
| 1561 | |
| 1562 | n = s->method->ssl_get_message(s, SSL3_ST_CR_SRVR_DONE_A, |
| 1563 | SSL3_ST_CR_SRVR_DONE_B, SSL3_MT_SERVER_DONE, |
| 1564 | 30, /* should be very small, like 0 :-) */ |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 1565 | ssl_hash_message, &ok); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1566 | |
| 1567 | if (!ok) { |
| 1568 | return n; |
| 1569 | } |
| 1570 | |
| 1571 | if (n > 0) { |
| 1572 | /* should contain no data */ |
| 1573 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1574 | OPENSSL_PUT_ERROR(SSL, SSL_R_LENGTH_MISMATCH); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1575 | return -1; |
| 1576 | } |
| 1577 | |
| 1578 | return 1; |
| 1579 | } |
| 1580 | |
Kenny Root | e99801b | 2015-11-06 15:31:15 -0800 | [diff] [blame] | 1581 | OPENSSL_COMPILE_ASSERT(sizeof(size_t) >= sizeof(unsigned), |
| 1582 | SIZE_T_IS_SMALLER_THAN_UNSIGNED); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1583 | |
| 1584 | int ssl3_send_client_key_exchange(SSL *s) { |
| 1585 | uint8_t *p; |
| 1586 | int n = 0; |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 1587 | uint32_t alg_k; |
| 1588 | uint32_t alg_a; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1589 | uint8_t *q; |
| 1590 | EVP_PKEY *pkey = NULL; |
| 1591 | EC_KEY *clnt_ecdh = NULL; |
| 1592 | const EC_POINT *srvr_ecpoint = NULL; |
| 1593 | EVP_PKEY *srvr_pub_pkey = NULL; |
| 1594 | uint8_t *encodedPoint = NULL; |
| 1595 | int encoded_pt_len = 0; |
| 1596 | BN_CTX *bn_ctx = NULL; |
| 1597 | unsigned int psk_len = 0; |
| 1598 | uint8_t psk[PSK_MAX_PSK_LEN]; |
| 1599 | uint8_t *pms = NULL; |
| 1600 | size_t pms_len = 0; |
| 1601 | |
| 1602 | if (s->state == SSL3_ST_CW_KEY_EXCH_A) { |
| 1603 | p = ssl_handshake_start(s); |
| 1604 | |
| 1605 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
| 1606 | alg_a = s->s3->tmp.new_cipher->algorithm_auth; |
| 1607 | |
| 1608 | /* If using a PSK key exchange, prepare the pre-shared key. */ |
| 1609 | if (alg_a & SSL_aPSK) { |
| 1610 | char identity[PSK_MAX_IDENTITY_LEN + 1]; |
| 1611 | size_t identity_len; |
| 1612 | |
| 1613 | if (s->psk_client_callback == NULL) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1614 | OPENSSL_PUT_ERROR(SSL, SSL_R_PSK_NO_CLIENT_CB); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1615 | goto err; |
| 1616 | } |
| 1617 | |
| 1618 | memset(identity, 0, sizeof(identity)); |
| 1619 | psk_len = |
| 1620 | s->psk_client_callback(s, s->s3->tmp.peer_psk_identity_hint, identity, |
| 1621 | sizeof(identity), psk, sizeof(psk)); |
| 1622 | if (psk_len > PSK_MAX_PSK_LEN) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1623 | OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1624 | goto err; |
| 1625 | } else if (psk_len == 0) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1626 | OPENSSL_PUT_ERROR(SSL, SSL_R_PSK_IDENTITY_NOT_FOUND); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1627 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); |
| 1628 | goto err; |
| 1629 | } |
| 1630 | |
| 1631 | identity_len = OPENSSL_strnlen(identity, sizeof(identity)); |
| 1632 | if (identity_len > PSK_MAX_IDENTITY_LEN) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1633 | OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1634 | goto err; |
| 1635 | } |
| 1636 | |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 1637 | OPENSSL_free(s->session->psk_identity); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1638 | s->session->psk_identity = BUF_strdup(identity); |
| 1639 | if (s->session->psk_identity == NULL) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1640 | OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1641 | goto err; |
| 1642 | } |
| 1643 | |
| 1644 | /* Write out psk_identity. */ |
| 1645 | s2n(identity_len, p); |
| 1646 | memcpy(p, identity, identity_len); |
| 1647 | p += identity_len; |
| 1648 | n = 2 + identity_len; |
| 1649 | } |
| 1650 | |
| 1651 | /* Depending on the key exchange method, compute |pms| and |pms_len|. */ |
| 1652 | if (alg_k & SSL_kRSA) { |
| 1653 | RSA *rsa; |
| 1654 | size_t enc_pms_len; |
| 1655 | |
| 1656 | pms_len = SSL_MAX_MASTER_KEY_LENGTH; |
| 1657 | pms = OPENSSL_malloc(pms_len); |
| 1658 | if (pms == NULL) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1659 | OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1660 | goto err; |
| 1661 | } |
| 1662 | |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1663 | pkey = X509_get_pubkey(s->session->peer); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1664 | if (pkey == NULL || |
| 1665 | pkey->type != EVP_PKEY_RSA || |
| 1666 | pkey->pkey.rsa == NULL) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1667 | OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR); |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 1668 | EVP_PKEY_free(pkey); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1669 | goto err; |
| 1670 | } |
| 1671 | |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1672 | s->session->key_exchange_info = EVP_PKEY_bits(pkey); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1673 | rsa = pkey->pkey.rsa; |
| 1674 | EVP_PKEY_free(pkey); |
| 1675 | |
| 1676 | pms[0] = s->client_version >> 8; |
| 1677 | pms[1] = s->client_version & 0xff; |
| 1678 | if (!RAND_bytes(&pms[2], SSL_MAX_MASTER_KEY_LENGTH - 2)) { |
| 1679 | goto err; |
| 1680 | } |
| 1681 | |
| 1682 | s->session->master_key_length = SSL_MAX_MASTER_KEY_LENGTH; |
| 1683 | |
| 1684 | q = p; |
| 1685 | /* In TLS and beyond, reserve space for the length prefix. */ |
| 1686 | if (s->version > SSL3_VERSION) { |
| 1687 | p += 2; |
| 1688 | n += 2; |
| 1689 | } |
| 1690 | if (!RSA_encrypt(rsa, &enc_pms_len, p, RSA_size(rsa), pms, pms_len, |
| 1691 | RSA_PKCS1_PADDING)) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1692 | OPENSSL_PUT_ERROR(SSL, SSL_R_BAD_RSA_ENCRYPT); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1693 | goto err; |
| 1694 | } |
| 1695 | n += enc_pms_len; |
| 1696 | |
| 1697 | /* Log the premaster secret, if logging is enabled. */ |
| 1698 | if (!ssl_ctx_log_rsa_client_key_exchange(s->ctx, p, enc_pms_len, pms, |
| 1699 | pms_len)) { |
| 1700 | goto err; |
| 1701 | } |
| 1702 | |
| 1703 | /* Fill in the length prefix. */ |
| 1704 | if (s->version > SSL3_VERSION) { |
| 1705 | s2n(enc_pms_len, q); |
| 1706 | } |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 1707 | } else if (alg_k & SSL_kDHE) { |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1708 | DH *dh_srvr, *dh_clnt; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1709 | int dh_len; |
| 1710 | size_t pub_len; |
| 1711 | |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1712 | if (s->s3->tmp.peer_dh_tmp == NULL) { |
| 1713 | OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1714 | goto err; |
| 1715 | } |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1716 | dh_srvr = s->s3->tmp.peer_dh_tmp; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1717 | |
| 1718 | /* generate a new random key */ |
| 1719 | dh_clnt = DHparams_dup(dh_srvr); |
| 1720 | if (dh_clnt == NULL) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1721 | OPENSSL_PUT_ERROR(SSL, ERR_R_DH_LIB); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1722 | goto err; |
| 1723 | } |
| 1724 | if (!DH_generate_key(dh_clnt)) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1725 | OPENSSL_PUT_ERROR(SSL, ERR_R_DH_LIB); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1726 | DH_free(dh_clnt); |
| 1727 | goto err; |
| 1728 | } |
| 1729 | |
| 1730 | pms_len = DH_size(dh_clnt); |
| 1731 | pms = OPENSSL_malloc(pms_len); |
| 1732 | if (pms == NULL) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1733 | OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1734 | DH_free(dh_clnt); |
| 1735 | goto err; |
| 1736 | } |
| 1737 | |
| 1738 | dh_len = DH_compute_key(pms, dh_srvr->pub_key, dh_clnt); |
| 1739 | if (dh_len <= 0) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1740 | OPENSSL_PUT_ERROR(SSL, ERR_R_DH_LIB); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1741 | DH_free(dh_clnt); |
| 1742 | goto err; |
| 1743 | } |
| 1744 | pms_len = dh_len; |
| 1745 | |
| 1746 | /* send off the data */ |
| 1747 | pub_len = BN_num_bytes(dh_clnt->pub_key); |
| 1748 | s2n(pub_len, p); |
| 1749 | BN_bn2bin(dh_clnt->pub_key, p); |
| 1750 | n += 2 + pub_len; |
| 1751 | |
| 1752 | DH_free(dh_clnt); |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 1753 | } else if (alg_k & SSL_kECDHE) { |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1754 | const EC_GROUP *srvr_group = NULL; |
| 1755 | EC_KEY *tkey; |
Kenny Root | e99801b | 2015-11-06 15:31:15 -0800 | [diff] [blame] | 1756 | int ecdh_len; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1757 | |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1758 | if (s->s3->tmp.peer_ecdh_tmp == NULL) { |
| 1759 | OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1760 | goto err; |
| 1761 | } |
| 1762 | |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1763 | tkey = s->s3->tmp.peer_ecdh_tmp; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1764 | |
| 1765 | srvr_group = EC_KEY_get0_group(tkey); |
| 1766 | srvr_ecpoint = EC_KEY_get0_public_key(tkey); |
| 1767 | if (srvr_group == NULL || srvr_ecpoint == NULL) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1768 | OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1769 | goto err; |
| 1770 | } |
| 1771 | |
| 1772 | clnt_ecdh = EC_KEY_new(); |
| 1773 | if (clnt_ecdh == NULL) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1774 | OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1775 | goto err; |
| 1776 | } |
| 1777 | |
| 1778 | if (!EC_KEY_set_group(clnt_ecdh, srvr_group)) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1779 | OPENSSL_PUT_ERROR(SSL, ERR_R_EC_LIB); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1780 | goto err; |
| 1781 | } |
| 1782 | |
| 1783 | /* Generate a new ECDH key pair */ |
| 1784 | if (!EC_KEY_generate_key(clnt_ecdh)) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1785 | OPENSSL_PUT_ERROR(SSL, ERR_R_ECDH_LIB); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1786 | goto err; |
| 1787 | } |
| 1788 | |
Kenny Root | e99801b | 2015-11-06 15:31:15 -0800 | [diff] [blame] | 1789 | unsigned field_size = EC_GROUP_get_degree(srvr_group); |
| 1790 | if (field_size == 0) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1791 | OPENSSL_PUT_ERROR(SSL, ERR_R_ECDH_LIB); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1792 | goto err; |
| 1793 | } |
| 1794 | |
| 1795 | pms_len = (field_size + 7) / 8; |
| 1796 | pms = OPENSSL_malloc(pms_len); |
| 1797 | if (pms == NULL) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1798 | OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1799 | goto err; |
| 1800 | } |
| 1801 | |
| 1802 | ecdh_len = ECDH_compute_key(pms, pms_len, srvr_ecpoint, clnt_ecdh, NULL); |
| 1803 | if (ecdh_len <= 0) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1804 | OPENSSL_PUT_ERROR(SSL, ERR_R_ECDH_LIB); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1805 | goto err; |
| 1806 | } |
| 1807 | pms_len = ecdh_len; |
| 1808 | |
| 1809 | /* First check the size of encoding and allocate memory accordingly. */ |
| 1810 | encoded_pt_len = |
| 1811 | EC_POINT_point2oct(srvr_group, EC_KEY_get0_public_key(clnt_ecdh), |
| 1812 | POINT_CONVERSION_UNCOMPRESSED, NULL, 0, NULL); |
| 1813 | |
| 1814 | encodedPoint = |
| 1815 | (uint8_t *)OPENSSL_malloc(encoded_pt_len * sizeof(uint8_t)); |
| 1816 | bn_ctx = BN_CTX_new(); |
| 1817 | if (encodedPoint == NULL || bn_ctx == NULL) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1818 | OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1819 | goto err; |
| 1820 | } |
| 1821 | |
| 1822 | /* Encode the public key */ |
| 1823 | encoded_pt_len = EC_POINT_point2oct( |
| 1824 | srvr_group, EC_KEY_get0_public_key(clnt_ecdh), |
| 1825 | POINT_CONVERSION_UNCOMPRESSED, encodedPoint, encoded_pt_len, bn_ctx); |
| 1826 | |
| 1827 | *p = encoded_pt_len; /* length of encoded point */ |
| 1828 | /* Encoded point will be copied here */ |
| 1829 | p += 1; |
| 1830 | n += 1; |
| 1831 | /* copy the point */ |
| 1832 | memcpy(p, encodedPoint, encoded_pt_len); |
| 1833 | /* increment n to account for length field */ |
| 1834 | n += encoded_pt_len; |
| 1835 | |
| 1836 | /* Free allocated memory */ |
| 1837 | BN_CTX_free(bn_ctx); |
| 1838 | bn_ctx = NULL; |
| 1839 | OPENSSL_free(encodedPoint); |
| 1840 | encodedPoint = NULL; |
| 1841 | EC_KEY_free(clnt_ecdh); |
| 1842 | clnt_ecdh = NULL; |
| 1843 | EVP_PKEY_free(srvr_pub_pkey); |
| 1844 | srvr_pub_pkey = NULL; |
| 1845 | } else if (alg_k & SSL_kPSK) { |
| 1846 | /* For plain PSK, other_secret is a block of 0s with the same length as |
| 1847 | * the pre-shared key. */ |
| 1848 | pms_len = psk_len; |
| 1849 | pms = OPENSSL_malloc(pms_len); |
| 1850 | if (pms == NULL) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1851 | OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1852 | goto err; |
| 1853 | } |
| 1854 | memset(pms, 0, pms_len); |
| 1855 | } else { |
| 1856 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1857 | OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1858 | goto err; |
| 1859 | } |
| 1860 | |
| 1861 | /* For a PSK cipher suite, other_secret is combined with the pre-shared |
| 1862 | * key. */ |
| 1863 | if (alg_a & SSL_aPSK) { |
| 1864 | CBB cbb, child; |
| 1865 | uint8_t *new_pms; |
| 1866 | size_t new_pms_len; |
| 1867 | |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1868 | CBB_zero(&cbb); |
| 1869 | if (!CBB_init(&cbb, 2 + psk_len + 2 + pms_len) || |
| 1870 | !CBB_add_u16_length_prefixed(&cbb, &child) || |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1871 | !CBB_add_bytes(&child, pms, pms_len) || |
| 1872 | !CBB_add_u16_length_prefixed(&cbb, &child) || |
| 1873 | !CBB_add_bytes(&child, psk, psk_len) || |
| 1874 | !CBB_finish(&cbb, &new_pms, &new_pms_len)) { |
| 1875 | CBB_cleanup(&cbb); |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1876 | OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1877 | goto err; |
| 1878 | } |
| 1879 | OPENSSL_cleanse(pms, pms_len); |
| 1880 | OPENSSL_free(pms); |
| 1881 | pms = new_pms; |
| 1882 | pms_len = new_pms_len; |
| 1883 | } |
| 1884 | |
| 1885 | /* The message must be added to the finished hash before calculating the |
| 1886 | * master secret. */ |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 1887 | if (!ssl_set_handshake_header(s, SSL3_MT_CLIENT_KEY_EXCHANGE, n)) { |
| 1888 | goto err; |
| 1889 | } |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1890 | s->state = SSL3_ST_CW_KEY_EXCH_B; |
| 1891 | |
| 1892 | s->session->master_key_length = s->enc_method->generate_master_secret( |
| 1893 | s, s->session->master_key, pms, pms_len); |
| 1894 | if (s->session->master_key_length == 0) { |
| 1895 | goto err; |
| 1896 | } |
| 1897 | s->session->extended_master_secret = s->s3->tmp.extended_master_secret; |
| 1898 | OPENSSL_cleanse(pms, pms_len); |
| 1899 | OPENSSL_free(pms); |
| 1900 | } |
| 1901 | |
| 1902 | /* SSL3_ST_CW_KEY_EXCH_B */ |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 1903 | return s->method->do_write(s); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1904 | |
| 1905 | err: |
| 1906 | BN_CTX_free(bn_ctx); |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 1907 | OPENSSL_free(encodedPoint); |
| 1908 | EC_KEY_free(clnt_ecdh); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1909 | EVP_PKEY_free(srvr_pub_pkey); |
| 1910 | if (pms) { |
| 1911 | OPENSSL_cleanse(pms, pms_len); |
| 1912 | OPENSSL_free(pms); |
| 1913 | } |
| 1914 | return -1; |
| 1915 | } |
| 1916 | |
| 1917 | int ssl3_send_cert_verify(SSL *s) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1918 | if (s->state == SSL3_ST_CW_CERT_VRFY_A || |
| 1919 | s->state == SSL3_ST_CW_CERT_VRFY_B) { |
| 1920 | enum ssl_private_key_result_t sign_result; |
| 1921 | uint8_t *p = ssl_handshake_start(s); |
| 1922 | size_t signature_length = 0; |
| 1923 | unsigned long n = 0; |
| 1924 | assert(ssl_has_private_key(s)); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1925 | |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1926 | if (s->state == SSL3_ST_CW_CERT_VRFY_A) { |
| 1927 | uint8_t *buf = (uint8_t *)s->init_buf->data; |
| 1928 | const EVP_MD *md = NULL; |
| 1929 | uint8_t digest[EVP_MAX_MD_SIZE]; |
| 1930 | size_t digest_length; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1931 | |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1932 | /* Write out the digest type if need be. */ |
| 1933 | if (SSL_USE_SIGALGS(s)) { |
| 1934 | md = tls1_choose_signing_digest(s); |
| 1935 | if (!tls12_get_sigandhash(s, p, md)) { |
| 1936 | OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR); |
| 1937 | return -1; |
| 1938 | } |
| 1939 | p += 2; |
| 1940 | n += 2; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1941 | } |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1942 | |
| 1943 | /* Compute the digest. */ |
| 1944 | const int pkey_type = ssl_private_key_type(s); |
| 1945 | if (!ssl3_cert_verify_hash(s, digest, &digest_length, &md, pkey_type)) { |
| 1946 | return -1; |
| 1947 | } |
| 1948 | |
| 1949 | /* The handshake buffer is no longer necessary. */ |
| 1950 | ssl3_free_handshake_buffer(s); |
| 1951 | |
| 1952 | /* Sign the digest. */ |
| 1953 | signature_length = ssl_private_key_max_signature_len(s); |
| 1954 | if (p + 2 + signature_length > buf + SSL3_RT_MAX_PLAIN_LENGTH) { |
| 1955 | OPENSSL_PUT_ERROR(SSL, SSL_R_DATA_LENGTH_TOO_LONG); |
| 1956 | return -1; |
| 1957 | } |
| 1958 | |
| 1959 | s->rwstate = SSL_PRIVATE_KEY_OPERATION; |
| 1960 | sign_result = ssl_private_key_sign(s, &p[2], &signature_length, |
| 1961 | signature_length, md, digest, |
| 1962 | digest_length); |
| 1963 | } else { |
| 1964 | if (SSL_USE_SIGALGS(s)) { |
| 1965 | /* The digest has already been selected and written. */ |
| 1966 | p += 2; |
| 1967 | n += 2; |
| 1968 | } |
| 1969 | signature_length = ssl_private_key_max_signature_len(s); |
| 1970 | s->rwstate = SSL_PRIVATE_KEY_OPERATION; |
| 1971 | sign_result = ssl_private_key_sign_complete(s, &p[2], &signature_length, |
| 1972 | signature_length); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1973 | } |
| 1974 | |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1975 | if (sign_result == ssl_private_key_retry) { |
| 1976 | s->state = SSL3_ST_CW_CERT_VRFY_B; |
| 1977 | return -1; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1978 | } |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1979 | s->rwstate = SSL_NOTHING; |
| 1980 | if (sign_result != ssl_private_key_success) { |
| 1981 | return -1; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1982 | } |
| 1983 | |
| 1984 | s2n(signature_length, p); |
| 1985 | n += signature_length + 2; |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 1986 | if (!ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE_VERIFY, n)) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1987 | return -1; |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 1988 | } |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1989 | s->state = SSL3_ST_CW_CERT_VRFY_C; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1990 | } |
| 1991 | |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1992 | return ssl_do_write(s); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1993 | } |
| 1994 | |
| 1995 | /* ssl3_has_client_certificate returns true if a client certificate is |
| 1996 | * configured. */ |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 1997 | static int ssl3_has_client_certificate(SSL *ssl) { |
| 1998 | return ssl->cert && ssl->cert->x509 && ssl_has_private_key(ssl); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 1999 | } |
| 2000 | |
| 2001 | int ssl3_send_client_certificate(SSL *s) { |
| 2002 | X509 *x509 = NULL; |
| 2003 | EVP_PKEY *pkey = NULL; |
| 2004 | int i; |
| 2005 | |
| 2006 | if (s->state == SSL3_ST_CW_CERT_A) { |
| 2007 | /* Let cert callback update client certificates if required */ |
| 2008 | if (s->cert->cert_cb) { |
| 2009 | i = s->cert->cert_cb(s, s->cert->cert_cb_arg); |
| 2010 | if (i < 0) { |
| 2011 | s->rwstate = SSL_X509_LOOKUP; |
| 2012 | return -1; |
| 2013 | } |
| 2014 | if (i == 0) { |
| 2015 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); |
| 2016 | return 0; |
| 2017 | } |
| 2018 | s->rwstate = SSL_NOTHING; |
| 2019 | } |
| 2020 | |
| 2021 | if (ssl3_has_client_certificate(s)) { |
| 2022 | s->state = SSL3_ST_CW_CERT_C; |
| 2023 | } else { |
| 2024 | s->state = SSL3_ST_CW_CERT_B; |
| 2025 | } |
| 2026 | } |
| 2027 | |
| 2028 | /* We need to get a client cert */ |
| 2029 | if (s->state == SSL3_ST_CW_CERT_B) { |
| 2030 | /* If we get an error, we need to: |
| 2031 | * ssl->rwstate=SSL_X509_LOOKUP; return(-1); |
| 2032 | * We then get retried later */ |
| 2033 | i = ssl_do_client_cert_cb(s, &x509, &pkey); |
| 2034 | if (i < 0) { |
| 2035 | s->rwstate = SSL_X509_LOOKUP; |
| 2036 | return -1; |
| 2037 | } |
| 2038 | s->rwstate = SSL_NOTHING; |
| 2039 | if (i == 1 && pkey != NULL && x509 != NULL) { |
| 2040 | s->state = SSL3_ST_CW_CERT_B; |
| 2041 | if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey)) { |
| 2042 | i = 0; |
| 2043 | } |
| 2044 | } else if (i == 1) { |
| 2045 | i = 0; |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 2046 | OPENSSL_PUT_ERROR(SSL, SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 2047 | } |
| 2048 | |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 2049 | X509_free(x509); |
| 2050 | EVP_PKEY_free(pkey); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 2051 | if (i && !ssl3_has_client_certificate(s)) { |
| 2052 | i = 0; |
| 2053 | } |
| 2054 | if (i == 0) { |
| 2055 | if (s->version == SSL3_VERSION) { |
| 2056 | s->s3->tmp.cert_req = 0; |
| 2057 | ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE); |
| 2058 | return 1; |
| 2059 | } else { |
| 2060 | s->s3->tmp.cert_req = 2; |
Adam Langley | f4e4272 | 2015-06-04 17:45:09 -0700 | [diff] [blame] | 2061 | /* There is no client certificate, so the handshake buffer may be |
| 2062 | * released. */ |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 2063 | ssl3_free_handshake_buffer(s); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 2064 | } |
| 2065 | } |
| 2066 | |
| 2067 | /* Ok, we have a cert */ |
| 2068 | s->state = SSL3_ST_CW_CERT_C; |
| 2069 | } |
| 2070 | |
| 2071 | if (s->state == SSL3_ST_CW_CERT_C) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 2072 | if (s->s3->tmp.cert_req == 2) { |
| 2073 | /* Send an empty Certificate message. */ |
| 2074 | uint8_t *p = ssl_handshake_start(s); |
| 2075 | l2n3(0, p); |
| 2076 | if (!ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE, 3)) { |
| 2077 | return -1; |
| 2078 | } |
| 2079 | } else if (!ssl3_output_cert_chain(s)) { |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 2080 | return -1; |
| 2081 | } |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 2082 | s->state = SSL3_ST_CW_CERT_D; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 2083 | } |
| 2084 | |
| 2085 | /* SSL3_ST_CW_CERT_D */ |
| 2086 | return ssl_do_write(s); |
| 2087 | } |
| 2088 | |
Kenny Root | e99801b | 2015-11-06 15:31:15 -0800 | [diff] [blame] | 2089 | int ssl3_send_next_proto(SSL *ssl) { |
| 2090 | if (ssl->state == SSL3_ST_CW_NEXT_PROTO_B) { |
| 2091 | return ssl_do_write(ssl); |
Adam Langley | fdeb488 | 2015-10-30 13:15:30 -0700 | [diff] [blame] | 2092 | } |
| 2093 | |
Kenny Root | e99801b | 2015-11-06 15:31:15 -0800 | [diff] [blame] | 2094 | assert(ssl->state == SSL3_ST_CW_NEXT_PROTO_A); |
Kenny Root | 03bcf61 | 2015-11-05 20:20:27 +0000 | [diff] [blame] | 2095 | |
Kenny Root | e99801b | 2015-11-06 15:31:15 -0800 | [diff] [blame] | 2096 | static const uint8_t kZero[32] = {0}; |
| 2097 | size_t padding_len = 32 - ((ssl->next_proto_negotiated_len + 2) % 32); |
Kenny Root | 03bcf61 | 2015-11-05 20:20:27 +0000 | [diff] [blame] | 2098 | |
Kenny Root | e99801b | 2015-11-06 15:31:15 -0800 | [diff] [blame] | 2099 | CBB cbb, child; |
| 2100 | size_t length; |
| 2101 | CBB_zero(&cbb); |
| 2102 | if (!CBB_init_fixed(&cbb, ssl_handshake_start(ssl), |
| 2103 | ssl->init_buf->max - SSL_HM_HEADER_LENGTH(ssl)) || |
| 2104 | !CBB_add_u8_length_prefixed(&cbb, &child) || |
| 2105 | !CBB_add_bytes(&child, ssl->next_proto_negotiated, |
| 2106 | ssl->next_proto_negotiated_len) || |
| 2107 | !CBB_add_u8_length_prefixed(&cbb, &child) || |
| 2108 | !CBB_add_bytes(&child, kZero, padding_len) || |
| 2109 | !CBB_finish(&cbb, NULL, &length) || |
| 2110 | !ssl_set_handshake_header(ssl, SSL3_MT_NEXT_PROTO, length)) { |
| 2111 | OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR); |
| 2112 | CBB_cleanup(&cbb); |
Adam Langley | fdeb488 | 2015-10-30 13:15:30 -0700 | [diff] [blame] | 2113 | return -1; |
| 2114 | } |
Adam Langley | fdeb488 | 2015-10-30 13:15:30 -0700 | [diff] [blame] | 2115 | |
Kenny Root | e99801b | 2015-11-06 15:31:15 -0800 | [diff] [blame] | 2116 | ssl->state = SSL3_ST_CW_NEXT_PROTO_B; |
| 2117 | return ssl_do_write(ssl); |
| 2118 | } |
| 2119 | |
| 2120 | static int write_32_byte_big_endian(CBB *out, const BIGNUM *in) { |
| 2121 | uint8_t *ptr; |
| 2122 | return CBB_add_space(out, &ptr, 32) && |
| 2123 | BN_bn2bin_padded(ptr, 32, in); |
| 2124 | } |
| 2125 | |
| 2126 | int ssl3_send_channel_id(SSL *ssl) { |
| 2127 | if (ssl->state == SSL3_ST_CW_CHANNEL_ID_B) { |
| 2128 | return ssl_do_write(ssl); |
| 2129 | } |
| 2130 | |
| 2131 | assert(ssl->state == SSL3_ST_CW_CHANNEL_ID_A); |
| 2132 | |
| 2133 | if (ssl->tlsext_channel_id_private == NULL && |
| 2134 | ssl->ctx->channel_id_cb != NULL) { |
| 2135 | EVP_PKEY *key = NULL; |
| 2136 | ssl->ctx->channel_id_cb(ssl, &key); |
| 2137 | if (key != NULL && |
| 2138 | !SSL_set1_tls_channel_id(ssl, key)) { |
| 2139 | EVP_PKEY_free(key); |
| 2140 | return -1; |
| 2141 | } |
| 2142 | EVP_PKEY_free(key); |
| 2143 | } |
| 2144 | |
| 2145 | if (ssl->tlsext_channel_id_private == NULL) { |
| 2146 | ssl->rwstate = SSL_CHANNEL_ID_LOOKUP; |
| 2147 | return -1; |
| 2148 | } |
| 2149 | ssl->rwstate = SSL_NOTHING; |
| 2150 | |
| 2151 | if (EVP_PKEY_id(ssl->tlsext_channel_id_private) != EVP_PKEY_EC) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 2152 | OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR); |
| 2153 | return -1; |
Kenny Root | a04d78d | 2015-09-25 00:26:37 +0000 | [diff] [blame] | 2154 | } |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 2155 | |
Kenny Root | e99801b | 2015-11-06 15:31:15 -0800 | [diff] [blame] | 2156 | int ret = -1; |
| 2157 | EC_KEY *ec_key = ssl->tlsext_channel_id_private->pkey.ec; |
| 2158 | BIGNUM *x = BN_new(); |
| 2159 | BIGNUM *y = BN_new(); |
| 2160 | ECDSA_SIG *sig = NULL; |
| 2161 | if (x == NULL || y == NULL || |
| 2162 | !EC_POINT_get_affine_coordinates_GFp(EC_KEY_get0_group(ec_key), |
| 2163 | EC_KEY_get0_public_key(ec_key), |
| 2164 | x, y, NULL)) { |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 2165 | goto err; |
| 2166 | } |
| 2167 | |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 2168 | uint8_t digest[EVP_MAX_MD_SIZE]; |
| 2169 | size_t digest_len; |
Kenny Root | e99801b | 2015-11-06 15:31:15 -0800 | [diff] [blame] | 2170 | if (!tls1_channel_id_hash(ssl, digest, &digest_len)) { |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 2171 | goto err; |
| 2172 | } |
| 2173 | |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 2174 | sig = ECDSA_do_sign(digest, digest_len, ec_key); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 2175 | if (sig == NULL) { |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 2176 | goto err; |
| 2177 | } |
| 2178 | |
Kenny Root | e99801b | 2015-11-06 15:31:15 -0800 | [diff] [blame] | 2179 | CBB cbb, child; |
| 2180 | size_t length; |
| 2181 | CBB_zero(&cbb); |
| 2182 | if (!CBB_init_fixed(&cbb, ssl_handshake_start(ssl), |
| 2183 | ssl->init_buf->max - SSL_HM_HEADER_LENGTH(ssl)) || |
| 2184 | !CBB_add_u16(&cbb, TLSEXT_TYPE_channel_id) || |
| 2185 | !CBB_add_u16_length_prefixed(&cbb, &child) || |
| 2186 | !write_32_byte_big_endian(&child, x) || |
| 2187 | !write_32_byte_big_endian(&child, y) || |
| 2188 | !write_32_byte_big_endian(&child, sig->r) || |
| 2189 | !write_32_byte_big_endian(&child, sig->s) || |
| 2190 | !CBB_finish(&cbb, NULL, &length) || |
| 2191 | !ssl_set_handshake_header(ssl, SSL3_MT_ENCRYPTED_EXTENSIONS, length)) { |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 2192 | OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR); |
Kenny Root | e99801b | 2015-11-06 15:31:15 -0800 | [diff] [blame] | 2193 | CBB_cleanup(&cbb); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 2194 | goto err; |
| 2195 | } |
| 2196 | |
Kenny Root | e99801b | 2015-11-06 15:31:15 -0800 | [diff] [blame] | 2197 | ssl->state = SSL3_ST_CW_CHANNEL_ID_B; |
| 2198 | ret = ssl_do_write(ssl); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 2199 | |
| 2200 | err: |
Kenny Root | e99801b | 2015-11-06 15:31:15 -0800 | [diff] [blame] | 2201 | BN_free(x); |
| 2202 | BN_free(y); |
Adam Langley | e9ada86 | 2015-05-11 17:20:37 -0700 | [diff] [blame] | 2203 | ECDSA_SIG_free(sig); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 2204 | return ret; |
| 2205 | } |
| 2206 | |
Kenny Root | e99801b | 2015-11-06 15:31:15 -0800 | [diff] [blame] | 2207 | int ssl_do_client_cert_cb(SSL *ssl, X509 **out_x509, EVP_PKEY **out_pkey) { |
| 2208 | if (ssl->ctx->client_cert_cb == NULL) { |
| 2209 | return 0; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 2210 | } |
Kenny Root | e99801b | 2015-11-06 15:31:15 -0800 | [diff] [blame] | 2211 | return ssl->ctx->client_cert_cb(ssl, out_x509, out_pkey); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 2212 | } |
Kenny Root | b849459 | 2015-09-25 02:29:14 +0000 | [diff] [blame] | 2213 | |
| 2214 | int ssl3_verify_server_cert(SSL *s) { |
| 2215 | int ret = ssl_verify_cert_chain(s, s->session->cert_chain); |
| 2216 | if (s->verify_mode != SSL_VERIFY_NONE && ret <= 0) { |
| 2217 | int al = ssl_verify_alarm_type(s->verify_result); |
| 2218 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
| 2219 | OPENSSL_PUT_ERROR(SSL, SSL_R_CERTIFICATE_VERIFY_FAILED); |
| 2220 | } else { |
| 2221 | ret = 1; |
| 2222 | ERR_clear_error(); /* but we keep s->verify_result */ |
| 2223 | } |
| 2224 | |
| 2225 | return ret; |
| 2226 | } |