1 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com) 2 * All rights reserved. 3 * 4 * This package is an SSL implementation written 5 * by Eric Young (eay (at) 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 (at) 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 (at) 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 (at) 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) 1998-2002 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 (at) 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 (at) cryptsoft.com). This product includes software written by Tim 107 * Hudson (tjh (at) cryptsoft.com). */ 108 /* ==================================================================== 109 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. 110 * ECC cipher suite support in OpenSSL originally developed by 111 * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project. */ 112 113 #include <openssl/ssl.h> 114 115 #include <assert.h> 116 117 #include <utility> 118 119 #include <openssl/rand.h> 120 121 #include "../crypto/internal.h" 122 #include "internal.h" 123 124 125 BSSL_NAMESPACE_BEGIN 126 127 SSL_HANDSHAKE::SSL_HANDSHAKE(SSL *ssl_arg) 128 : ssl(ssl_arg), 129 scts_requested(false), 130 needs_psk_binder(false), 131 received_hello_retry_request(false), 132 sent_hello_retry_request(false), 133 handshake_finalized(false), 134 accept_psk_mode(false), 135 cert_request(false), 136 certificate_status_expected(false), 137 ocsp_stapling_requested(false), 138 delegated_credential_requested(false), 139 should_ack_sni(false), 140 in_false_start(false), 141 in_early_data(false), 142 early_data_offered(false), 143 can_early_read(false), 144 can_early_write(false), 145 next_proto_neg_seen(false), 146 ticket_expected(false), 147 extended_master_secret(false), 148 pending_private_key_op(false), 149 grease_seeded(false), 150 handback(false), 151 cert_compression_negotiated(false), 152 apply_jdk11_workaround(false) { 153 assert(ssl); 154 } 155 156 SSL_HANDSHAKE::~SSL_HANDSHAKE() { 157 ssl->ctx->x509_method->hs_flush_cached_ca_names(this); 158 } 159 160 UniquePtr<SSL_HANDSHAKE> ssl_handshake_new(SSL *ssl) { 161 UniquePtr<SSL_HANDSHAKE> hs = MakeUnique<SSL_HANDSHAKE>(ssl); 162 if (!hs || !hs->transcript.Init()) { 163 return nullptr; 164 } 165 hs->config = ssl->config.get(); 166 if (!hs->config) { 167 assert(hs->config); 168 return nullptr; 169 } 170 return hs; 171 } 172 173 bool ssl_check_message_type(SSL *ssl, const SSLMessage &msg, int type) { 174 if (msg.type != type) { 175 ssl_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE); 176 OPENSSL_PUT_ERROR(SSL, SSL_R_UNEXPECTED_MESSAGE); 177 ERR_add_error_dataf("got type %d, wanted type %d", msg.type, type); 178 return false; 179 } 180 181 return true; 182 } 183 184 bool ssl_add_message_cbb(SSL *ssl, CBB *cbb) { 185 Array<uint8_t> msg; 186 if (!ssl->method->finish_message(ssl, cbb, &msg) || 187 !ssl->method->add_message(ssl, std::move(msg))) { 188 return false; 189 } 190 191 return true; 192 } 193 194 size_t ssl_max_handshake_message_len(const SSL *ssl) { 195 // kMaxMessageLen is the default maximum message size for handshakes which do 196 // not accept peer certificate chains. 197 static const size_t kMaxMessageLen = 16384; 198 199 if (SSL_in_init(ssl)) { 200 SSL_CONFIG *config = ssl->config.get(); // SSL_in_init() implies not NULL. 201 if ((!ssl->server || (config->verify_mode & SSL_VERIFY_PEER)) && 202 kMaxMessageLen < ssl->max_cert_list) { 203 return ssl->max_cert_list; 204 } 205 return kMaxMessageLen; 206 } 207 208 if (ssl_protocol_version(ssl) < TLS1_3_VERSION) { 209 // In TLS 1.2 and below, the largest acceptable post-handshake message is 210 // a HelloRequest. 211 return 0; 212 } 213 214 if (ssl->server) { 215 // The largest acceptable post-handshake message for a server is a 216 // KeyUpdate. We will never initiate post-handshake auth. 217 return 1; 218 } 219 220 // Clients must accept NewSessionTicket, so allow the default size. 221 return kMaxMessageLen; 222 } 223 224 bool ssl_hash_message(SSL_HANDSHAKE *hs, const SSLMessage &msg) { 225 // V2ClientHello messages are pre-hashed. 226 if (msg.is_v2_hello) { 227 return true; 228 } 229 230 return hs->transcript.Update(msg.raw); 231 } 232 233 int ssl_parse_extensions(const CBS *cbs, uint8_t *out_alert, 234 const SSL_EXTENSION_TYPE *ext_types, 235 size_t num_ext_types, int ignore_unknown) { 236 // Reset everything. 237 for (size_t i = 0; i < num_ext_types; i++) { 238 *ext_types[i].out_present = 0; 239 CBS_init(ext_types[i].out_data, NULL, 0); 240 } 241 242 CBS copy = *cbs; 243 while (CBS_len(©) != 0) { 244 uint16_t type; 245 CBS data; 246 if (!CBS_get_u16(©, &type) || 247 !CBS_get_u16_length_prefixed(©, &data)) { 248 OPENSSL_PUT_ERROR(SSL, SSL_R_PARSE_TLSEXT); 249 *out_alert = SSL_AD_DECODE_ERROR; 250 return 0; 251 } 252 253 const SSL_EXTENSION_TYPE *ext_type = NULL; 254 for (size_t i = 0; i < num_ext_types; i++) { 255 if (type == ext_types[i].type) { 256 ext_type = &ext_types[i]; 257 break; 258 } 259 } 260 261 if (ext_type == NULL) { 262 if (ignore_unknown) { 263 continue; 264 } 265 OPENSSL_PUT_ERROR(SSL, SSL_R_UNEXPECTED_EXTENSION); 266 *out_alert = SSL_AD_UNSUPPORTED_EXTENSION; 267 return 0; 268 } 269 270 // Duplicate ext_types are forbidden. 271 if (*ext_type->out_present) { 272 OPENSSL_PUT_ERROR(SSL, SSL_R_DUPLICATE_EXTENSION); 273 *out_alert = SSL_AD_ILLEGAL_PARAMETER; 274 return 0; 275 } 276 277 *ext_type->out_present = 1; 278 *ext_type->out_data = data; 279 } 280 281 return 1; 282 } 283 284 enum ssl_verify_result_t ssl_verify_peer_cert(SSL_HANDSHAKE *hs) { 285 SSL *const ssl = hs->ssl; 286 const SSL_SESSION *prev_session = ssl->s3->established_session.get(); 287 if (prev_session != NULL) { 288 // If renegotiating, the server must not change the server certificate. See 289 // https://mitls.org/pages/attacks/3SHAKE. We never resume on renegotiation, 290 // so this check is sufficient to ensure the reported peer certificate never 291 // changes on renegotiation. 292 assert(!ssl->server); 293 if (sk_CRYPTO_BUFFER_num(prev_session->certs.get()) != 294 sk_CRYPTO_BUFFER_num(hs->new_session->certs.get())) { 295 OPENSSL_PUT_ERROR(SSL, SSL_R_SERVER_CERT_CHANGED); 296 ssl_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_ILLEGAL_PARAMETER); 297 return ssl_verify_invalid; 298 } 299 300 for (size_t i = 0; i < sk_CRYPTO_BUFFER_num(hs->new_session->certs.get()); 301 i++) { 302 const CRYPTO_BUFFER *old_cert = 303 sk_CRYPTO_BUFFER_value(prev_session->certs.get(), i); 304 const CRYPTO_BUFFER *new_cert = 305 sk_CRYPTO_BUFFER_value(hs->new_session->certs.get(), i); 306 if (CRYPTO_BUFFER_len(old_cert) != CRYPTO_BUFFER_len(new_cert) || 307 OPENSSL_memcmp(CRYPTO_BUFFER_data(old_cert), 308 CRYPTO_BUFFER_data(new_cert), 309 CRYPTO_BUFFER_len(old_cert)) != 0) { 310 OPENSSL_PUT_ERROR(SSL, SSL_R_SERVER_CERT_CHANGED); 311 ssl_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_ILLEGAL_PARAMETER); 312 return ssl_verify_invalid; 313 } 314 } 315 316 // The certificate is identical, so we may skip re-verifying the 317 // certificate. Since we only authenticated the previous one, copy other 318 // authentication from the established session and ignore what was newly 319 // received. 320 hs->new_session->ocsp_response = UpRef(prev_session->ocsp_response); 321 hs->new_session->signed_cert_timestamp_list = 322 UpRef(prev_session->signed_cert_timestamp_list); 323 hs->new_session->verify_result = prev_session->verify_result; 324 return ssl_verify_ok; 325 } 326 327 uint8_t alert = SSL_AD_CERTIFICATE_UNKNOWN; 328 enum ssl_verify_result_t ret; 329 if (hs->config->custom_verify_callback != nullptr) { 330 ret = hs->config->custom_verify_callback(ssl, &alert); 331 switch (ret) { 332 case ssl_verify_ok: 333 hs->new_session->verify_result = X509_V_OK; 334 break; 335 case ssl_verify_invalid: 336 // If |SSL_VERIFY_NONE|, the error is non-fatal, but we keep the result. 337 if (hs->config->verify_mode == SSL_VERIFY_NONE) { 338 ERR_clear_error(); 339 ret = ssl_verify_ok; 340 } 341 hs->new_session->verify_result = X509_V_ERR_APPLICATION_VERIFICATION; 342 break; 343 case ssl_verify_retry: 344 break; 345 } 346 } else { 347 ret = ssl->ctx->x509_method->session_verify_cert_chain( 348 hs->new_session.get(), hs, &alert) 349 ? ssl_verify_ok 350 : ssl_verify_invalid; 351 } 352 353 if (ret == ssl_verify_invalid) { 354 OPENSSL_PUT_ERROR(SSL, SSL_R_CERTIFICATE_VERIFY_FAILED); 355 ssl_send_alert(ssl, SSL3_AL_FATAL, alert); 356 } 357 358 // Emulate OpenSSL's client OCSP callback. OpenSSL verifies certificates 359 // before it receives the OCSP, so it needs a second callback for OCSP. 360 if (ret == ssl_verify_ok && !ssl->server && 361 hs->config->ocsp_stapling_enabled && 362 ssl->ctx->legacy_ocsp_callback != nullptr) { 363 int cb_ret = 364 ssl->ctx->legacy_ocsp_callback(ssl, ssl->ctx->legacy_ocsp_callback_arg); 365 if (cb_ret <= 0) { 366 OPENSSL_PUT_ERROR(SSL, SSL_R_OCSP_CB_ERROR); 367 ssl_send_alert(ssl, SSL3_AL_FATAL, 368 cb_ret == 0 ? SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE 369 : SSL_AD_INTERNAL_ERROR); 370 ret = ssl_verify_invalid; 371 } 372 } 373 374 return ret; 375 } 376 377 // Verifies a stored certificate when resuming a session. A few things are 378 // different from verify_peer_cert: 379 // 1. We can't be renegotiating if we're resuming a session. 380 // 2. The session is immutable, so we don't support verify_mode == 381 // SSL_VERIFY_NONE 382 // 3. We don't call the OCSP callback. 383 // 4. We only support custom verify callbacks. 384 enum ssl_verify_result_t ssl_reverify_peer_cert(SSL_HANDSHAKE *hs) { 385 SSL *const ssl = hs->ssl; 386 assert(ssl->s3->established_session == nullptr); 387 assert(hs->config->verify_mode != SSL_VERIFY_NONE); 388 389 uint8_t alert = SSL_AD_CERTIFICATE_UNKNOWN; 390 enum ssl_verify_result_t ret = ssl_verify_invalid; 391 if (hs->config->custom_verify_callback != nullptr) { 392 ret = hs->config->custom_verify_callback(ssl, &alert); 393 } 394 395 if (ret == ssl_verify_invalid) { 396 OPENSSL_PUT_ERROR(SSL, SSL_R_CERTIFICATE_VERIFY_FAILED); 397 ssl_send_alert(ssl, SSL3_AL_FATAL, alert); 398 } 399 400 return ret; 401 } 402 403 uint16_t ssl_get_grease_value(SSL_HANDSHAKE *hs, 404 enum ssl_grease_index_t index) { 405 // Draw entropy for all GREASE values at once. This avoids calling 406 // |RAND_bytes| repeatedly and makes the values consistent within a 407 // connection. The latter is so the second ClientHello matches after 408 // HelloRetryRequest and so supported_groups and key_shares are consistent. 409 if (!hs->grease_seeded) { 410 RAND_bytes(hs->grease_seed, sizeof(hs->grease_seed)); 411 hs->grease_seeded = true; 412 } 413 414 // This generates a random value of the form 0xaa, for all 0 < 16. 415 uint16_t ret = hs->grease_seed[index]; 416 ret = (ret & 0xf0) | 0x0a; 417 ret |= ret << 8; 418 return ret; 419 } 420 421 enum ssl_hs_wait_t ssl_get_finished(SSL_HANDSHAKE *hs) { 422 SSL *const ssl = hs->ssl; 423 SSLMessage msg; 424 if (!ssl->method->get_message(ssl, &msg)) { 425 return ssl_hs_read_message; 426 } 427 428 if (!ssl_check_message_type(ssl, msg, SSL3_MT_FINISHED)) { 429 return ssl_hs_error; 430 } 431 432 // Snapshot the finished hash before incorporating the new message. 433 uint8_t finished[EVP_MAX_MD_SIZE]; 434 size_t finished_len; 435 if (!hs->transcript.GetFinishedMAC(finished, &finished_len, 436 SSL_get_session(ssl), !ssl->server) || 437 !ssl_hash_message(hs, msg)) { 438 return ssl_hs_error; 439 } 440 441 int finished_ok = CBS_mem_equal(&msg.body, finished, finished_len); 442 #if defined(BORINGSSL_UNSAFE_FUZZER_MODE) 443 finished_ok = 1; 444 #endif 445 if (!finished_ok) { 446 ssl_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_DECRYPT_ERROR); 447 OPENSSL_PUT_ERROR(SSL, SSL_R_DIGEST_CHECK_FAILED); 448 return ssl_hs_error; 449 } 450 451 // Copy the Finished so we can use it for renegotiation checks. 452 if (finished_len > sizeof(ssl->s3->previous_client_finished) || 453 finished_len > sizeof(ssl->s3->previous_server_finished)) { 454 OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR); 455 return ssl_hs_error; 456 } 457 458 if (ssl->server) { 459 OPENSSL_memcpy(ssl->s3->previous_client_finished, finished, finished_len); 460 ssl->s3->previous_client_finished_len = finished_len; 461 } else { 462 OPENSSL_memcpy(ssl->s3->previous_server_finished, finished, finished_len); 463 ssl->s3->previous_server_finished_len = finished_len; 464 } 465 466 ssl->method->next_message(ssl); 467 return ssl_hs_ok; 468 } 469 470 bool ssl_send_finished(SSL_HANDSHAKE *hs) { 471 SSL *const ssl = hs->ssl; 472 const SSL_SESSION *session = SSL_get_session(ssl); 473 474 uint8_t finished[EVP_MAX_MD_SIZE]; 475 size_t finished_len; 476 if (!hs->transcript.GetFinishedMAC(finished, &finished_len, session, 477 ssl->server)) { 478 return 0; 479 } 480 481 // Log the master secret, if logging is enabled. 482 if (!ssl_log_secret(ssl, "CLIENT_RANDOM", session->master_key, 483 session->master_key_length)) { 484 return 0; 485 } 486 487 // Copy the Finished so we can use it for renegotiation checks. 488 if (finished_len > sizeof(ssl->s3->previous_client_finished) || 489 finished_len > sizeof(ssl->s3->previous_server_finished)) { 490 OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR); 491 return 0; 492 } 493 494 if (ssl->server) { 495 OPENSSL_memcpy(ssl->s3->previous_server_finished, finished, finished_len); 496 ssl->s3->previous_server_finished_len = finished_len; 497 } else { 498 OPENSSL_memcpy(ssl->s3->previous_client_finished, finished, finished_len); 499 ssl->s3->previous_client_finished_len = finished_len; 500 } 501 502 ScopedCBB cbb; 503 CBB body; 504 if (!ssl->method->init_message(ssl, cbb.get(), &body, SSL3_MT_FINISHED) || 505 !CBB_add_bytes(&body, finished, finished_len) || 506 !ssl_add_message_cbb(ssl, cbb.get())) { 507 OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR); 508 return 0; 509 } 510 511 return 1; 512 } 513 514 bool ssl_output_cert_chain(SSL_HANDSHAKE *hs) { 515 ScopedCBB cbb; 516 CBB body; 517 if (!hs->ssl->method->init_message(hs->ssl, cbb.get(), &body, 518 SSL3_MT_CERTIFICATE) || 519 !ssl_add_cert_chain(hs, &body) || 520 !ssl_add_message_cbb(hs->ssl, cbb.get())) { 521 OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR); 522 return false; 523 } 524 525 return true; 526 } 527 528 int ssl_run_handshake(SSL_HANDSHAKE *hs, bool *out_early_return) { 529 SSL *const ssl = hs->ssl; 530 for (;;) { 531 // Resolve the operation the handshake was waiting on. 532 switch (hs->wait) { 533 case ssl_hs_error: 534 ERR_restore_state(hs->error.get()); 535 return -1; 536 537 case ssl_hs_flush: { 538 int ret = ssl->method->flush_flight(ssl); 539 if (ret <= 0) { 540 return ret; 541 } 542 break; 543 } 544 545 case ssl_hs_read_server_hello: 546 case ssl_hs_read_message: 547 case ssl_hs_read_change_cipher_spec: { 548 if (ssl->quic_method) { 549 hs->wait = ssl_hs_ok; 550 // The change cipher spec is omitted in QUIC. 551 if (hs->wait != ssl_hs_read_change_cipher_spec) { 552 ssl->s3->rwstate = SSL_READING; 553 return -1; 554 } 555 break; 556 } 557 558 uint8_t alert = SSL_AD_DECODE_ERROR; 559 size_t consumed = 0; 560 ssl_open_record_t ret; 561 if (hs->wait == ssl_hs_read_change_cipher_spec) { 562 ret = ssl_open_change_cipher_spec(ssl, &consumed, &alert, 563 ssl->s3->read_buffer.span()); 564 } else { 565 ret = ssl_open_handshake(ssl, &consumed, &alert, 566 ssl->s3->read_buffer.span()); 567 } 568 if (ret == ssl_open_record_error && 569 hs->wait == ssl_hs_read_server_hello) { 570 uint32_t err = ERR_peek_error(); 571 if (ERR_GET_LIB(err) == ERR_LIB_SSL && 572 ERR_GET_REASON(err) == SSL_R_SSLV3_ALERT_HANDSHAKE_FAILURE) { 573 // Add a dedicated error code to the queue for a handshake_failure 574 // alert in response to ClientHello. This matches NSS's client 575 // behavior and gives a better error on a (probable) failure to 576 // negotiate initial parameters. Note: this error code comes after 577 // the original one. 578 // 579 // See https://crbug.com/446505. 580 OPENSSL_PUT_ERROR(SSL, SSL_R_HANDSHAKE_FAILURE_ON_CLIENT_HELLO); 581 } 582 } 583 bool retry; 584 int bio_ret = ssl_handle_open_record(ssl, &retry, ret, consumed, alert); 585 if (bio_ret <= 0) { 586 return bio_ret; 587 } 588 if (retry) { 589 continue; 590 } 591 ssl->s3->read_buffer.DiscardConsumed(); 592 break; 593 } 594 595 case ssl_hs_read_end_of_early_data: { 596 if (ssl->s3->hs->can_early_read) { 597 // While we are processing early data, the handshake returns early. 598 *out_early_return = true; 599 return 1; 600 } 601 hs->wait = ssl_hs_ok; 602 break; 603 } 604 605 case ssl_hs_certificate_selection_pending: 606 ssl->s3->rwstate = SSL_CERTIFICATE_SELECTION_PENDING; 607 hs->wait = ssl_hs_ok; 608 return -1; 609 610 case ssl_hs_handoff: 611 ssl->s3->rwstate = SSL_HANDOFF; 612 hs->wait = ssl_hs_ok; 613 return -1; 614 615 case ssl_hs_handback: 616 ssl->s3->rwstate = SSL_HANDBACK; 617 hs->wait = ssl_hs_handback; 618 return -1; 619 620 case ssl_hs_x509_lookup: 621 ssl->s3->rwstate = SSL_X509_LOOKUP; 622 hs->wait = ssl_hs_ok; 623 return -1; 624 625 case ssl_hs_channel_id_lookup: 626 ssl->s3->rwstate = SSL_CHANNEL_ID_LOOKUP; 627 hs->wait = ssl_hs_ok; 628 return -1; 629 630 case ssl_hs_private_key_operation: 631 ssl->s3->rwstate = SSL_PRIVATE_KEY_OPERATION; 632 hs->wait = ssl_hs_ok; 633 return -1; 634 635 case ssl_hs_pending_session: 636 ssl->s3->rwstate = SSL_PENDING_SESSION; 637 hs->wait = ssl_hs_ok; 638 return -1; 639 640 case ssl_hs_pending_ticket: 641 ssl->s3->rwstate = SSL_PENDING_TICKET; 642 hs->wait = ssl_hs_ok; 643 return -1; 644 645 case ssl_hs_certificate_verify: 646 ssl->s3->rwstate = SSL_CERTIFICATE_VERIFY; 647 hs->wait = ssl_hs_ok; 648 return -1; 649 650 case ssl_hs_early_data_rejected: 651 ssl->s3->rwstate = SSL_EARLY_DATA_REJECTED; 652 // Cause |SSL_write| to start failing immediately. 653 hs->can_early_write = false; 654 return -1; 655 656 case ssl_hs_early_return: 657 *out_early_return = true; 658 hs->wait = ssl_hs_ok; 659 return 1; 660 661 case ssl_hs_ok: 662 break; 663 } 664 665 // Run the state machine again. 666 hs->wait = ssl->do_handshake(hs); 667 if (hs->wait == ssl_hs_error) { 668 hs->error.reset(ERR_save_state()); 669 return -1; 670 } 671 if (hs->wait == ssl_hs_ok) { 672 // The handshake has completed. 673 *out_early_return = false; 674 return 1; 675 } 676 677 // Otherwise, loop to the beginning and resolve what was blocking the 678 // handshake. 679 } 680 } 681 682 BSSL_NAMESPACE_END 683
