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) 1998-2002 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@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 * 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#include <limits.h> 117#include <string.h> 118 119#include <openssl/buf.h> 120#include <openssl/bytestring.h> 121#include <openssl/err.h> 122#include <openssl/evp.h> 123#include <openssl/mem.h> 124#include <openssl/md5.h> 125#include <openssl/nid.h> 126#include <openssl/rand.h> 127#include <openssl/sha.h> 128 129#include "../crypto/internal.h" 130#include "internal.h" 131 132 133namespace bssl { 134 135static bool add_record_to_flight(SSL *ssl, uint8_t type, 136 Span<const uint8_t> in) { 137 // We'll never add a flight while in the process of writing it out. 138 assert(ssl->s3->pending_flight_offset == 0); 139 140 if (ssl->s3->pending_flight == nullptr) { 141 ssl->s3->pending_flight.reset(BUF_MEM_new()); 142 if (ssl->s3->pending_flight == nullptr) { 143 return false; 144 } 145 } 146 147 size_t max_out = in.size() + SSL_max_seal_overhead(ssl); 148 size_t new_cap = ssl->s3->pending_flight->length + max_out; 149 if (max_out < in.size() || new_cap < max_out) { 150 OPENSSL_PUT_ERROR(SSL, ERR_R_OVERFLOW); 151 return false; 152 } 153 154 size_t len; 155 if (!BUF_MEM_reserve(ssl->s3->pending_flight.get(), new_cap) || 156 !tls_seal_record(ssl, 157 (uint8_t *)ssl->s3->pending_flight->data + 158 ssl->s3->pending_flight->length, 159 &len, max_out, type, in.data(), in.size())) { 160 return false; 161 } 162 163 ssl->s3->pending_flight->length += len; 164 return true; 165} 166 167bool ssl3_init_message(SSL *ssl, CBB *cbb, CBB *body, uint8_t type) { 168 // Pick a modest size hint to save most of the |realloc| calls. 169 if (!CBB_init(cbb, 64) || 170 !CBB_add_u8(cbb, type) || 171 !CBB_add_u24_length_prefixed(cbb, body)) { 172 OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR); 173 CBB_cleanup(cbb); 174 return false; 175 } 176 177 return true; 178} 179 180bool ssl3_finish_message(SSL *ssl, CBB *cbb, Array<uint8_t> *out_msg) { 181 return CBBFinishArray(cbb, out_msg); 182} 183 184bool ssl3_add_message(SSL *ssl, Array<uint8_t> msg) { 185 // Add the message to the current flight, splitting into several records if 186 // needed. 187 Span<const uint8_t> rest = msg; 188 do { 189 Span<const uint8_t> chunk = rest.subspan(0, ssl->max_send_fragment); 190 rest = rest.subspan(chunk.size()); 191 192 if (!add_record_to_flight(ssl, SSL3_RT_HANDSHAKE, chunk)) { 193 return false; 194 } 195 } while (!rest.empty()); 196 197 ssl_do_msg_callback(ssl, 1 /* write */, SSL3_RT_HANDSHAKE, msg); 198 // TODO(svaldez): Move this up a layer to fix abstraction for SSLTranscript on 199 // hs. 200 if (ssl->s3->hs != NULL && 201 !ssl->s3->hs->transcript.Update(msg)) { 202 return false; 203 } 204 return true; 205} 206 207bool ssl3_add_change_cipher_spec(SSL *ssl) { 208 static const uint8_t kChangeCipherSpec[1] = {SSL3_MT_CCS}; 209 210 if (!add_record_to_flight(ssl, SSL3_RT_CHANGE_CIPHER_SPEC, 211 kChangeCipherSpec)) { 212 return false; 213 } 214 215 ssl_do_msg_callback(ssl, 1 /* write */, SSL3_RT_CHANGE_CIPHER_SPEC, 216 kChangeCipherSpec); 217 return true; 218} 219 220bool ssl3_add_alert(SSL *ssl, uint8_t level, uint8_t desc) { 221 uint8_t alert[2] = {level, desc}; 222 if (!add_record_to_flight(ssl, SSL3_RT_ALERT, alert)) { 223 return false; 224 } 225 226 ssl_do_msg_callback(ssl, 1 /* write */, SSL3_RT_ALERT, alert); 227 ssl_do_info_callback(ssl, SSL_CB_WRITE_ALERT, ((int)level << 8) | desc); 228 return true; 229} 230 231int ssl3_flush_flight(SSL *ssl) { 232 if (ssl->s3->pending_flight == nullptr) { 233 return 1; 234 } 235 236 if (ssl->s3->write_shutdown != ssl_shutdown_none) { 237 OPENSSL_PUT_ERROR(SSL, SSL_R_PROTOCOL_IS_SHUTDOWN); 238 return -1; 239 } 240 241 if (ssl->s3->pending_flight->length > 0xffffffff || 242 ssl->s3->pending_flight->length > INT_MAX) { 243 OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR); 244 return -1; 245 } 246 247 // If there is pending data in the write buffer, it must be flushed out before 248 // any new data in pending_flight. 249 if (!ssl->s3->write_buffer.empty()) { 250 int ret = ssl_write_buffer_flush(ssl); 251 if (ret <= 0) { 252 ssl->s3->rwstate = SSL_WRITING; 253 return ret; 254 } 255 } 256 257 // Write the pending flight. 258 while (ssl->s3->pending_flight_offset < ssl->s3->pending_flight->length) { 259 int ret = BIO_write( 260 ssl->wbio, 261 ssl->s3->pending_flight->data + ssl->s3->pending_flight_offset, 262 ssl->s3->pending_flight->length - ssl->s3->pending_flight_offset); 263 if (ret <= 0) { 264 ssl->s3->rwstate = SSL_WRITING; 265 return ret; 266 } 267 268 ssl->s3->pending_flight_offset += ret; 269 } 270 271 if (BIO_flush(ssl->wbio) <= 0) { 272 ssl->s3->rwstate = SSL_WRITING; 273 return -1; 274 } 275 276 ssl->s3->pending_flight.reset(); 277 ssl->s3->pending_flight_offset = 0; 278 return 1; 279} 280 281static ssl_open_record_t read_v2_client_hello(SSL *ssl, size_t *out_consumed, 282 Span<const uint8_t> in) { 283 *out_consumed = 0; 284 assert(in.size() >= SSL3_RT_HEADER_LENGTH); 285 // Determine the length of the V2ClientHello. 286 size_t msg_length = ((in[0] & 0x7f) << 8) | in[1]; 287 if (msg_length > (1024 * 4)) { 288 OPENSSL_PUT_ERROR(SSL, SSL_R_RECORD_TOO_LARGE); 289 return ssl_open_record_error; 290 } 291 if (msg_length < SSL3_RT_HEADER_LENGTH - 2) { 292 // Reject lengths that are too short early. We have already read 293 // |SSL3_RT_HEADER_LENGTH| bytes, so we should not attempt to process an 294 // (invalid) V2ClientHello which would be shorter than that. 295 OPENSSL_PUT_ERROR(SSL, SSL_R_RECORD_LENGTH_MISMATCH); 296 return ssl_open_record_error; 297 } 298 299 // Ask for the remainder of the V2ClientHello. 300 if (in.size() < 2 + msg_length) { 301 *out_consumed = 2 + msg_length; 302 return ssl_open_record_partial; 303 } 304 305 CBS v2_client_hello = CBS(ssl->s3->read_buffer.span().subspan(2, msg_length)); 306 // The V2ClientHello without the length is incorporated into the handshake 307 // hash. This is only ever called at the start of the handshake, so hs is 308 // guaranteed to be non-NULL. 309 if (!ssl->s3->hs->transcript.Update(v2_client_hello)) { 310 return ssl_open_record_error; 311 } 312 313 ssl_do_msg_callback(ssl, 0 /* read */, 0 /* V2ClientHello */, 314 v2_client_hello); 315 316 uint8_t msg_type; 317 uint16_t version, cipher_spec_length, session_id_length, challenge_length; 318 CBS cipher_specs, session_id, challenge; 319 if (!CBS_get_u8(&v2_client_hello, &msg_type) || 320 !CBS_get_u16(&v2_client_hello, &version) || 321 !CBS_get_u16(&v2_client_hello, &cipher_spec_length) || 322 !CBS_get_u16(&v2_client_hello, &session_id_length) || 323 !CBS_get_u16(&v2_client_hello, &challenge_length) || 324 !CBS_get_bytes(&v2_client_hello, &cipher_specs, cipher_spec_length) || 325 !CBS_get_bytes(&v2_client_hello, &session_id, session_id_length) || 326 !CBS_get_bytes(&v2_client_hello, &challenge, challenge_length) || 327 CBS_len(&v2_client_hello) != 0) { 328 OPENSSL_PUT_ERROR(SSL, SSL_R_DECODE_ERROR); 329 return ssl_open_record_error; 330 } 331 332 // msg_type has already been checked. 333 assert(msg_type == SSL2_MT_CLIENT_HELLO); 334 335 // The client_random is the V2ClientHello challenge. Truncate or left-pad with 336 // zeros as needed. 337 size_t rand_len = CBS_len(&challenge); 338 if (rand_len > SSL3_RANDOM_SIZE) { 339 rand_len = SSL3_RANDOM_SIZE; 340 } 341 uint8_t random[SSL3_RANDOM_SIZE]; 342 OPENSSL_memset(random, 0, SSL3_RANDOM_SIZE); 343 OPENSSL_memcpy(random + (SSL3_RANDOM_SIZE - rand_len), CBS_data(&challenge), 344 rand_len); 345 346 // Write out an equivalent SSLv3 ClientHello. 347 size_t max_v3_client_hello = SSL3_HM_HEADER_LENGTH + 2 /* version */ + 348 SSL3_RANDOM_SIZE + 1 /* session ID length */ + 349 2 /* cipher list length */ + 350 CBS_len(&cipher_specs) / 3 * 2 + 351 1 /* compression length */ + 1 /* compression */; 352 ScopedCBB client_hello; 353 CBB hello_body, cipher_suites; 354 if (!BUF_MEM_reserve(ssl->s3->hs_buf.get(), max_v3_client_hello) || 355 !CBB_init_fixed(client_hello.get(), (uint8_t *)ssl->s3->hs_buf->data, 356 ssl->s3->hs_buf->max) || 357 !CBB_add_u8(client_hello.get(), SSL3_MT_CLIENT_HELLO) || 358 !CBB_add_u24_length_prefixed(client_hello.get(), &hello_body) || 359 !CBB_add_u16(&hello_body, version) || 360 !CBB_add_bytes(&hello_body, random, SSL3_RANDOM_SIZE) || 361 // No session id. 362 !CBB_add_u8(&hello_body, 0) || 363 !CBB_add_u16_length_prefixed(&hello_body, &cipher_suites)) { 364 OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE); 365 return ssl_open_record_error; 366 } 367 368 // Copy the cipher suites. 369 while (CBS_len(&cipher_specs) > 0) { 370 uint32_t cipher_spec; 371 if (!CBS_get_u24(&cipher_specs, &cipher_spec)) { 372 OPENSSL_PUT_ERROR(SSL, SSL_R_DECODE_ERROR); 373 return ssl_open_record_error; 374 } 375 376 // Skip SSLv2 ciphers. 377 if ((cipher_spec & 0xff0000) != 0) { 378 continue; 379 } 380 if (!CBB_add_u16(&cipher_suites, cipher_spec)) { 381 OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR); 382 return ssl_open_record_error; 383 } 384 } 385 386 // Add the null compression scheme and finish. 387 if (!CBB_add_u8(&hello_body, 1) || 388 !CBB_add_u8(&hello_body, 0) || 389 !CBB_finish(client_hello.get(), NULL, &ssl->s3->hs_buf->length)) { 390 OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR); 391 return ssl_open_record_error; 392 } 393 394 *out_consumed = 2 + msg_length; 395 ssl->s3->is_v2_hello = true; 396 return ssl_open_record_success; 397} 398 399static bool parse_message(const SSL *ssl, SSLMessage *out, 400 size_t *out_bytes_needed) { 401 if (!ssl->s3->hs_buf) { 402 *out_bytes_needed = 4; 403 return false; 404 } 405 406 CBS cbs; 407 uint32_t len; 408 CBS_init(&cbs, reinterpret_cast<const uint8_t *>(ssl->s3->hs_buf->data), 409 ssl->s3->hs_buf->length); 410 if (!CBS_get_u8(&cbs, &out->type) || 411 !CBS_get_u24(&cbs, &len)) { 412 *out_bytes_needed = 4; 413 return false; 414 } 415 416 if (!CBS_get_bytes(&cbs, &out->body, len)) { 417 *out_bytes_needed = 4 + len; 418 return false; 419 } 420 421 CBS_init(&out->raw, reinterpret_cast<const uint8_t *>(ssl->s3->hs_buf->data), 422 4 + len); 423 out->is_v2_hello = ssl->s3->is_v2_hello; 424 return true; 425} 426 427bool ssl3_get_message(SSL *ssl, SSLMessage *out) { 428 size_t unused; 429 if (!parse_message(ssl, out, &unused)) { 430 return false; 431 } 432 if (!ssl->s3->has_message) { 433 if (!out->is_v2_hello) { 434 ssl_do_msg_callback(ssl, 0 /* read */, SSL3_RT_HANDSHAKE, out->raw); 435 } 436 ssl->s3->has_message = true; 437 } 438 return true; 439} 440 441bool tls_can_accept_handshake_data(const SSL *ssl, uint8_t *out_alert) { 442 // If there is a complete message, the caller must have consumed it first. 443 SSLMessage msg; 444 size_t bytes_needed; 445 if (parse_message(ssl, &msg, &bytes_needed)) { 446 OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR); 447 *out_alert = SSL_AD_INTERNAL_ERROR; 448 return false; 449 } 450 451 // Enforce the limit so the peer cannot force us to buffer 16MB. 452 if (bytes_needed > 4 + ssl_max_handshake_message_len(ssl)) { 453 OPENSSL_PUT_ERROR(SSL, SSL_R_EXCESSIVE_MESSAGE_SIZE); 454 *out_alert = SSL_AD_ILLEGAL_PARAMETER; 455 return false; 456 } 457 458 return true; 459} 460 461bool tls_has_unprocessed_handshake_data(const SSL *ssl) { 462 size_t msg_len = 0; 463 if (ssl->s3->has_message) { 464 SSLMessage msg; 465 size_t unused; 466 if (parse_message(ssl, &msg, &unused)) { 467 msg_len = CBS_len(&msg.raw); 468 } 469 } 470 471 return ssl->s3->hs_buf && ssl->s3->hs_buf->length > msg_len; 472} 473 474ssl_open_record_t ssl3_open_handshake(SSL *ssl, size_t *out_consumed, 475 uint8_t *out_alert, Span<uint8_t> in) { 476 *out_consumed = 0; 477 // Re-create the handshake buffer if needed. 478 if (!ssl->s3->hs_buf) { 479 ssl->s3->hs_buf.reset(BUF_MEM_new()); 480 if (!ssl->s3->hs_buf) { 481 *out_alert = SSL_AD_INTERNAL_ERROR; 482 return ssl_open_record_error; 483 } 484 } 485 486 // Bypass the record layer for the first message to handle V2ClientHello. 487 if (ssl->server && !ssl->s3->v2_hello_done) { 488 // Ask for the first 5 bytes, the size of the TLS record header. This is 489 // sufficient to detect a V2ClientHello and ensures that we never read 490 // beyond the first record. 491 if (in.size() < SSL3_RT_HEADER_LENGTH) { 492 *out_consumed = SSL3_RT_HEADER_LENGTH; 493 return ssl_open_record_partial; 494 } 495 496 // Some dedicated error codes for protocol mixups should the application 497 // wish to interpret them differently. (These do not overlap with 498 // ClientHello or V2ClientHello.) 499 const char *str = reinterpret_cast<const char*>(in.data()); 500 if (strncmp("GET ", str, 4) == 0 || 501 strncmp("POST ", str, 5) == 0 || 502 strncmp("HEAD ", str, 5) == 0 || 503 strncmp("PUT ", str, 4) == 0) { 504 OPENSSL_PUT_ERROR(SSL, SSL_R_HTTP_REQUEST); 505 *out_alert = 0; 506 return ssl_open_record_error; 507 } 508 if (strncmp("CONNE", str, 5) == 0) { 509 OPENSSL_PUT_ERROR(SSL, SSL_R_HTTPS_PROXY_REQUEST); 510 *out_alert = 0; 511 return ssl_open_record_error; 512 } 513 514 // Check for a V2ClientHello. 515 if ((in[0] & 0x80) != 0 && in[2] == SSL2_MT_CLIENT_HELLO && 516 in[3] == SSL3_VERSION_MAJOR) { 517 auto ret = read_v2_client_hello(ssl, out_consumed, in); 518 if (ret == ssl_open_record_error) { 519 *out_alert = 0; 520 } else if (ret == ssl_open_record_success) { 521 ssl->s3->v2_hello_done = true; 522 } 523 return ret; 524 } 525 526 ssl->s3->v2_hello_done = true; 527 } 528 529 uint8_t type; 530 Span<uint8_t> body; 531 auto ret = tls_open_record(ssl, &type, &body, out_consumed, out_alert, in); 532 if (ret != ssl_open_record_success) { 533 return ret; 534 } 535 536 // WatchGuard's TLS 1.3 interference bug is very distinctive: they drop the 537 // ServerHello and send the remaining encrypted application data records 538 // as-is. This manifests as an application data record when we expect 539 // handshake. Report a dedicated error code for this case. 540 if (!ssl->server && type == SSL3_RT_APPLICATION_DATA && 541 ssl->s3->aead_read_ctx->is_null_cipher()) { 542 OPENSSL_PUT_ERROR(SSL, SSL_R_APPLICATION_DATA_INSTEAD_OF_HANDSHAKE); 543 *out_alert = SSL_AD_UNEXPECTED_MESSAGE; 544 return ssl_open_record_error; 545 } 546 547 if (type != SSL3_RT_HANDSHAKE) { 548 OPENSSL_PUT_ERROR(SSL, SSL_R_UNEXPECTED_RECORD); 549 *out_alert = SSL_AD_UNEXPECTED_MESSAGE; 550 return ssl_open_record_error; 551 } 552 553 // Append the entire handshake record to the buffer. 554 if (!BUF_MEM_append(ssl->s3->hs_buf.get(), body.data(), body.size())) { 555 *out_alert = SSL_AD_INTERNAL_ERROR; 556 return ssl_open_record_error; 557 } 558 559 return ssl_open_record_success; 560} 561 562void ssl3_next_message(SSL *ssl) { 563 SSLMessage msg; 564 if (!ssl3_get_message(ssl, &msg) || 565 !ssl->s3->hs_buf || 566 ssl->s3->hs_buf->length < CBS_len(&msg.raw)) { 567 assert(0); 568 return; 569 } 570 571 OPENSSL_memmove(ssl->s3->hs_buf->data, 572 ssl->s3->hs_buf->data + CBS_len(&msg.raw), 573 ssl->s3->hs_buf->length - CBS_len(&msg.raw)); 574 ssl->s3->hs_buf->length -= CBS_len(&msg.raw); 575 ssl->s3->is_v2_hello = false; 576 ssl->s3->has_message = false; 577 578 // Post-handshake messages are rare, so release the buffer after every 579 // message. During the handshake, |on_handshake_complete| will release it. 580 if (!SSL_in_init(ssl) && ssl->s3->hs_buf->length == 0) { 581 ssl->s3->hs_buf.reset(); 582 } 583} 584 585} // namespace bssl 586