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 namespace bssl { 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 received_custom_extension(false), 134 handshake_finalized(false), 135 accept_psk_mode(false), 136 cert_request(false), 137 certificate_status_expected(false), 138 ocsp_stapling_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 } 151 152 SSL_HANDSHAKE::~SSL_HANDSHAKE() { 153 ssl->ctx->x509_method->hs_flush_cached_ca_names(this); 154 } 155 156 UniquePtr<SSL_HANDSHAKE> ssl_handshake_new(SSL *ssl) { 157 UniquePtr<SSL_HANDSHAKE> hs = MakeUnique<SSL_HANDSHAKE>(ssl); 158 if (!hs || 159 !hs->transcript.Init()) { 160 return nullptr; 161 } 162 return hs; 163 } 164 165 bool ssl_check_message_type(SSL *ssl, const SSLMessage &msg, int type) { 166 if (msg.type != type) { 167 ssl_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE); 168 OPENSSL_PUT_ERROR(SSL, SSL_R_UNEXPECTED_MESSAGE); 169 ERR_add_error_dataf("got type %d, wanted type %d", msg.type, type); 170 return false; 171 } 172 173 return true; 174 } 175 176 bool ssl_add_message_cbb(SSL *ssl, CBB *cbb) { 177 Array<uint8_t> msg; 178 if (!ssl->method->finish_message(ssl, cbb, &msg) || 179 !ssl->method->add_message(ssl, std::move(msg))) { 180 return false; 181 } 182 183 return true; 184 } 185 186 size_t ssl_max_handshake_message_len(const SSL *ssl) { 187 // kMaxMessageLen is the default maximum message size for handshakes which do 188 // not accept peer certificate chains. 189 static const size_t kMaxMessageLen = 16384; 190 191 if (SSL_in_init(ssl)) { 192 if ((!ssl->server || (ssl->verify_mode & SSL_VERIFY_PEER)) && 193 kMaxMessageLen < ssl->max_cert_list) { 194 return ssl->max_cert_list; 195 } 196 return kMaxMessageLen; 197 } 198 199 if (ssl_protocol_version(ssl) < TLS1_3_VERSION) { 200 // In TLS 1.2 and below, the largest acceptable post-handshake message is 201 // a HelloRequest. 202 return 0; 203 } 204 205 if (ssl->server) { 206 // The largest acceptable post-handshake message for a server is a 207 // KeyUpdate. We will never initiate post-handshake auth. 208 return 1; 209 } 210 211 // Clients must accept NewSessionTicket, so allow the default size. 212 return kMaxMessageLen; 213 } 214 215 bool ssl_hash_message(SSL_HANDSHAKE *hs, const SSLMessage &msg) { 216 // V2ClientHello messages are pre-hashed. 217 if (msg.is_v2_hello) { 218 return true; 219 } 220 221 return hs->transcript.Update(msg.raw); 222 } 223 224 int ssl_parse_extensions(const CBS *cbs, uint8_t *out_alert, 225 const SSL_EXTENSION_TYPE *ext_types, 226 size_t num_ext_types, int ignore_unknown) { 227 // Reset everything. 228 for (size_t i = 0; i < num_ext_types; i++) { 229 *ext_types[i].out_present = 0; 230 CBS_init(ext_types[i].out_data, NULL, 0); 231 } 232 233 CBS copy = *cbs; 234 while (CBS_len(©) != 0) { 235 uint16_t type; 236 CBS data; 237 if (!CBS_get_u16(©, &type) || 238 !CBS_get_u16_length_prefixed(©, &data)) { 239 OPENSSL_PUT_ERROR(SSL, SSL_R_PARSE_TLSEXT); 240 *out_alert = SSL_AD_DECODE_ERROR; 241 return 0; 242 } 243 244 const SSL_EXTENSION_TYPE *ext_type = NULL; 245 for (size_t i = 0; i < num_ext_types; i++) { 246 if (type == ext_types[i].type) { 247 ext_type = &ext_types[i]; 248 break; 249 } 250 } 251 252 if (ext_type == NULL) { 253 if (ignore_unknown) { 254 continue; 255 } 256 OPENSSL_PUT_ERROR(SSL, SSL_R_UNEXPECTED_EXTENSION); 257 *out_alert = SSL_AD_UNSUPPORTED_EXTENSION; 258 return 0; 259 } 260 261 // Duplicate ext_types are forbidden. 262 if (*ext_type->out_present) { 263 OPENSSL_PUT_ERROR(SSL, SSL_R_DUPLICATE_EXTENSION); 264 *out_alert = SSL_AD_ILLEGAL_PARAMETER; 265 return 0; 266 } 267 268 *ext_type->out_present = 1; 269 *ext_type->out_data = data; 270 } 271 272 return 1; 273 } 274 275 static void set_crypto_buffer(CRYPTO_BUFFER **dest, CRYPTO_BUFFER *src) { 276 // TODO(davidben): Remove this helper once |SSL_SESSION| can use |UniquePtr| 277 // and |UniquePtr| has up_ref helpers. 278 CRYPTO_BUFFER_free(*dest); 279 *dest = src; 280 if (src != nullptr) { 281 CRYPTO_BUFFER_up_ref(src); 282 } 283 } 284 285 enum ssl_verify_result_t ssl_verify_peer_cert(SSL_HANDSHAKE *hs) { 286 SSL *const ssl = hs->ssl; 287 const SSL_SESSION *prev_session = ssl->s3->established_session.get(); 288 if (prev_session != NULL) { 289 // If renegotiating, the server must not change the server certificate. See 290 // https://mitls.org/pages/attacks/3SHAKE. We never resume on renegotiation, 291 // so this check is sufficient to ensure the reported peer certificate never 292 // changes on renegotiation. 293 assert(!ssl->server); 294 if (sk_CRYPTO_BUFFER_num(prev_session->certs) != 295 sk_CRYPTO_BUFFER_num(hs->new_session->certs)) { 296 OPENSSL_PUT_ERROR(SSL, SSL_R_SERVER_CERT_CHANGED); 297 ssl_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_ILLEGAL_PARAMETER); 298 return ssl_verify_invalid; 299 } 300 301 for (size_t i = 0; i < sk_CRYPTO_BUFFER_num(hs->new_session->certs); i++) { 302 const CRYPTO_BUFFER *old_cert = 303 sk_CRYPTO_BUFFER_value(prev_session->certs, i); 304 const CRYPTO_BUFFER *new_cert = 305 sk_CRYPTO_BUFFER_value(hs->new_session->certs, 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 set_crypto_buffer(&hs->new_session->ocsp_response, 321 prev_session->ocsp_response); 322 set_crypto_buffer(&hs->new_session->signed_cert_timestamp_list, 323 prev_session->signed_cert_timestamp_list); 324 hs->new_session->verify_result = prev_session->verify_result; 325 return ssl_verify_ok; 326 } 327 328 uint8_t alert = SSL_AD_CERTIFICATE_UNKNOWN; 329 enum ssl_verify_result_t ret; 330 if (ssl->custom_verify_callback != nullptr) { 331 ret = ssl->custom_verify_callback(ssl, &alert); 332 switch (ret) { 333 case ssl_verify_ok: 334 hs->new_session->verify_result = X509_V_OK; 335 break; 336 case ssl_verify_invalid: 337 // If |SSL_VERIFY_NONE|, the error is non-fatal, but we keep the result. 338 if (ssl->verify_mode == SSL_VERIFY_NONE) { 339 ERR_clear_error(); 340 ret = ssl_verify_ok; 341 } 342 hs->new_session->verify_result = X509_V_ERR_APPLICATION_VERIFICATION; 343 break; 344 case ssl_verify_retry: 345 break; 346 } 347 } else { 348 ret = ssl->ctx->x509_method->session_verify_cert_chain( 349 hs->new_session.get(), ssl, &alert) 350 ? ssl_verify_ok 351 : ssl_verify_invalid; 352 } 353 354 if (ret == ssl_verify_invalid) { 355 OPENSSL_PUT_ERROR(SSL, SSL_R_CERTIFICATE_VERIFY_FAILED); 356 ssl_send_alert(ssl, SSL3_AL_FATAL, alert); 357 } 358 359 return ret; 360 } 361 362 uint16_t ssl_get_grease_value(SSL_HANDSHAKE *hs, 363 enum ssl_grease_index_t index) { 364 // Draw entropy for all GREASE values at once. This avoids calling 365 // |RAND_bytes| repeatedly and makes the values consistent within a 366 // connection. The latter is so the second ClientHello matches after 367 // HelloRetryRequest and so supported_groups and key_shares are consistent. 368 if (!hs->grease_seeded) { 369 RAND_bytes(hs->grease_seed, sizeof(hs->grease_seed)); 370 hs->grease_seeded = true; 371 } 372 373 // This generates a random value of the form 0xaa, for all 0 < 16. 374 uint16_t ret = hs->grease_seed[index]; 375 ret = (ret & 0xf0) | 0x0a; 376 ret |= ret << 8; 377 return ret; 378 } 379 380 enum ssl_hs_wait_t ssl_get_finished(SSL_HANDSHAKE *hs) { 381 SSL *const ssl = hs->ssl; 382 SSLMessage msg; 383 if (!ssl->method->get_message(ssl, &msg)) { 384 return ssl_hs_read_message; 385 } 386 387 if (!ssl_check_message_type(ssl, msg, SSL3_MT_FINISHED)) { 388 return ssl_hs_error; 389 } 390 391 // Snapshot the finished hash before incorporating the new message. 392 uint8_t finished[EVP_MAX_MD_SIZE]; 393 size_t finished_len; 394 if (!hs->transcript.GetFinishedMAC(finished, &finished_len, 395 SSL_get_session(ssl), !ssl->server) || 396 !ssl_hash_message(hs, msg)) { 397 return ssl_hs_error; 398 } 399 400 int finished_ok = CBS_mem_equal(&msg.body, finished, finished_len); 401 #if defined(BORINGSSL_UNSAFE_FUZZER_MODE) 402 finished_ok = 1; 403 #endif 404 if (!finished_ok) { 405 ssl_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_DECRYPT_ERROR); 406 OPENSSL_PUT_ERROR(SSL, SSL_R_DIGEST_CHECK_FAILED); 407 return ssl_hs_error; 408 } 409 410 // Copy the Finished so we can use it for renegotiation checks. 411 if (ssl->version != SSL3_VERSION) { 412 if (finished_len > sizeof(ssl->s3->previous_client_finished) || 413 finished_len > sizeof(ssl->s3->previous_server_finished)) { 414 OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR); 415 return ssl_hs_error; 416 } 417 418 if (ssl->server) { 419 OPENSSL_memcpy(ssl->s3->previous_client_finished, finished, finished_len); 420 ssl->s3->previous_client_finished_len = finished_len; 421 } else { 422 OPENSSL_memcpy(ssl->s3->previous_server_finished, finished, finished_len); 423 ssl->s3->previous_server_finished_len = finished_len; 424 } 425 } 426 427 ssl->method->next_message(ssl); 428 return ssl_hs_ok; 429 } 430 431 bool ssl_send_finished(SSL_HANDSHAKE *hs) { 432 SSL *const ssl = hs->ssl; 433 const SSL_SESSION *session = SSL_get_session(ssl); 434 435 uint8_t finished[EVP_MAX_MD_SIZE]; 436 size_t finished_len; 437 if (!hs->transcript.GetFinishedMAC(finished, &finished_len, session, 438 ssl->server)) { 439 return 0; 440 } 441 442 // Log the master secret, if logging is enabled. 443 if (!ssl_log_secret(ssl, "CLIENT_RANDOM", 444 session->master_key, 445 session->master_key_length)) { 446 return 0; 447 } 448 449 // Copy the Finished so we can use it for renegotiation checks. 450 if (ssl->version != SSL3_VERSION) { 451 if (finished_len > sizeof(ssl->s3->previous_client_finished) || 452 finished_len > sizeof(ssl->s3->previous_server_finished)) { 453 OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR); 454 return 0; 455 } 456 457 if (ssl->server) { 458 OPENSSL_memcpy(ssl->s3->previous_server_finished, finished, finished_len); 459 ssl->s3->previous_server_finished_len = finished_len; 460 } else { 461 OPENSSL_memcpy(ssl->s3->previous_client_finished, finished, finished_len); 462 ssl->s3->previous_client_finished_len = finished_len; 463 } 464 } 465 466 ScopedCBB cbb; 467 CBB body; 468 if (!ssl->method->init_message(ssl, cbb.get(), &body, SSL3_MT_FINISHED) || 469 !CBB_add_bytes(&body, finished, finished_len) || 470 !ssl_add_message_cbb(ssl, cbb.get())) { 471 OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR); 472 return 0; 473 } 474 475 return 1; 476 } 477 478 bool ssl_output_cert_chain(SSL *ssl) { 479 ScopedCBB cbb; 480 CBB body; 481 if (!ssl->method->init_message(ssl, cbb.get(), &body, SSL3_MT_CERTIFICATE) || 482 !ssl_add_cert_chain(ssl, &body) || 483 !ssl_add_message_cbb(ssl, cbb.get())) { 484 OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR); 485 return false; 486 } 487 488 return true; 489 } 490 491 int ssl_run_handshake(SSL_HANDSHAKE *hs, bool *out_early_return) { 492 SSL *const ssl = hs->ssl; 493 for (;;) { 494 // Resolve the operation the handshake was waiting on. 495 switch (hs->wait) { 496 case ssl_hs_error: 497 ERR_restore_state(hs->error.get()); 498 return -1; 499 500 case ssl_hs_flush: { 501 int ret = ssl->method->flush_flight(ssl); 502 if (ret <= 0) { 503 return ret; 504 } 505 break; 506 } 507 508 case ssl_hs_read_server_hello: 509 case ssl_hs_read_message: 510 case ssl_hs_read_change_cipher_spec: { 511 uint8_t alert = SSL_AD_DECODE_ERROR; 512 size_t consumed = 0; 513 ssl_open_record_t ret; 514 if (hs->wait == ssl_hs_read_change_cipher_spec) { 515 ret = ssl_open_change_cipher_spec(ssl, &consumed, &alert, 516 ssl->s3->read_buffer.span()); 517 } else { 518 ret = ssl_open_handshake(ssl, &consumed, &alert, 519 ssl->s3->read_buffer.span()); 520 } 521 if (ret == ssl_open_record_error && 522 hs->wait == ssl_hs_read_server_hello) { 523 uint32_t err = ERR_peek_error(); 524 if (ERR_GET_LIB(err) == ERR_LIB_SSL && 525 ERR_GET_REASON(err) == SSL_R_SSLV3_ALERT_HANDSHAKE_FAILURE) { 526 // Add a dedicated error code to the queue for a handshake_failure 527 // alert in response to ClientHello. This matches NSS's client 528 // behavior and gives a better error on a (probable) failure to 529 // negotiate initial parameters. Note: this error code comes after 530 // the original one. 531 // 532 // See https://crbug.com/446505. 533 OPENSSL_PUT_ERROR(SSL, SSL_R_HANDSHAKE_FAILURE_ON_CLIENT_HELLO); 534 } 535 } 536 bool retry; 537 int bio_ret = ssl_handle_open_record(ssl, &retry, ret, consumed, alert); 538 if (bio_ret <= 0) { 539 return bio_ret; 540 } 541 if (retry) { 542 continue; 543 } 544 ssl->s3->read_buffer.DiscardConsumed(); 545 break; 546 } 547 548 case ssl_hs_read_end_of_early_data: { 549 if (ssl->s3->hs->can_early_read) { 550 // While we are processing early data, the handshake returns early. 551 *out_early_return = true; 552 return 1; 553 } 554 hs->wait = ssl_hs_ok; 555 break; 556 } 557 558 case ssl_hs_certificate_selection_pending: 559 ssl->s3->rwstate = SSL_CERTIFICATE_SELECTION_PENDING; 560 hs->wait = ssl_hs_ok; 561 return -1; 562 563 case ssl_hs_handoff: 564 ssl->s3->rwstate = SSL_HANDOFF; 565 hs->wait = ssl_hs_ok; 566 return -1; 567 568 case ssl_hs_x509_lookup: 569 ssl->s3->rwstate = SSL_X509_LOOKUP; 570 hs->wait = ssl_hs_ok; 571 return -1; 572 573 case ssl_hs_channel_id_lookup: 574 ssl->s3->rwstate = SSL_CHANNEL_ID_LOOKUP; 575 hs->wait = ssl_hs_ok; 576 return -1; 577 578 case ssl_hs_private_key_operation: 579 ssl->s3->rwstate = SSL_PRIVATE_KEY_OPERATION; 580 hs->wait = ssl_hs_ok; 581 return -1; 582 583 case ssl_hs_pending_session: 584 ssl->s3->rwstate = SSL_PENDING_SESSION; 585 hs->wait = ssl_hs_ok; 586 return -1; 587 588 case ssl_hs_pending_ticket: 589 ssl->s3->rwstate = SSL_PENDING_TICKET; 590 hs->wait = ssl_hs_ok; 591 return -1; 592 593 case ssl_hs_certificate_verify: 594 ssl->s3->rwstate = SSL_CERTIFICATE_VERIFY; 595 hs->wait = ssl_hs_ok; 596 return -1; 597 598 case ssl_hs_early_data_rejected: 599 ssl->s3->rwstate = SSL_EARLY_DATA_REJECTED; 600 // Cause |SSL_write| to start failing immediately. 601 hs->can_early_write = false; 602 return -1; 603 604 case ssl_hs_early_return: 605 *out_early_return = true; 606 hs->wait = ssl_hs_ok; 607 return 1; 608 609 case ssl_hs_ok: 610 break; 611 } 612 613 // Run the state machine again. 614 hs->wait = ssl->do_handshake(hs); 615 if (hs->wait == ssl_hs_error) { 616 hs->error.reset(ERR_save_state()); 617 return -1; 618 } 619 if (hs->wait == ssl_hs_ok) { 620 // The handshake has completed. 621 *out_early_return = false; 622 return 1; 623 } 624 625 // Otherwise, loop to the beginning and resolve what was blocking the 626 // handshake. 627 } 628 } 629 630 } // namespace bssl 631
