s3_clnt.c revision 306230
1/* ssl/s3_clnt.c */ 2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay@cryptsoft.com). 7 * The implementation was written so as to conform with Netscapes SSL. 8 * 9 * This library is free for commercial and non-commercial use as long as 10 * the following conditions are aheared to. The following conditions 11 * apply to all code found in this distribution, be it the RC4, RSA, 12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13 * included with this distribution is covered by the same copyright terms 14 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15 * 16 * Copyright remains Eric Young's, and as such any Copyright notices in 17 * the code are not to be removed. 18 * If this package is used in a product, Eric Young should be given attribution 19 * as the author of the parts of the library used. 20 * This can be in the form of a textual message at program startup or 21 * in documentation (online or textual) provided with the package. 22 * 23 * Redistribution and use in source and binary forms, with or without 24 * modification, are permitted provided that the following conditions 25 * are met: 26 * 1. Redistributions of source code must retain the copyright 27 * notice, this list of conditions and the following disclaimer. 28 * 2. Redistributions in binary form must reproduce the above copyright 29 * notice, this list of conditions and the following disclaimer in the 30 * documentation and/or other materials provided with the distribution. 31 * 3. All advertising materials mentioning features or use of this software 32 * must display the following acknowledgement: 33 * "This product includes cryptographic software written by 34 * Eric Young (eay@cryptsoft.com)" 35 * The word 'cryptographic' can be left out if the rouines from the library 36 * being used are not cryptographic related :-). 37 * 4. If you include any Windows specific code (or a derivative thereof) from 38 * the apps directory (application code) you must include an acknowledgement: 39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40 * 41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51 * SUCH DAMAGE. 52 * 53 * The licence and distribution terms for any publically available version or 54 * derivative of this code cannot be changed. i.e. this code cannot simply be 55 * copied and put under another distribution licence 56 * [including the GNU Public Licence.] 57 */ 58/* ==================================================================== 59 * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved. 60 * 61 * Redistribution and use in source and binary forms, with or without 62 * modification, are permitted provided that the following conditions 63 * are met: 64 * 65 * 1. Redistributions of source code must retain the above copyright 66 * notice, this list of conditions and the following disclaimer. 67 * 68 * 2. Redistributions in binary form must reproduce the above copyright 69 * notice, this list of conditions and the following disclaimer in 70 * the documentation and/or other materials provided with the 71 * distribution. 72 * 73 * 3. All advertising materials mentioning features or use of this 74 * software must display the following acknowledgment: 75 * "This product includes software developed by the OpenSSL Project 76 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" 77 * 78 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 79 * endorse or promote products derived from this software without 80 * prior written permission. For written permission, please contact 81 * openssl-core@openssl.org. 82 * 83 * 5. Products derived from this software may not be called "OpenSSL" 84 * nor may "OpenSSL" appear in their names without prior written 85 * permission of the OpenSSL Project. 86 * 87 * 6. Redistributions of any form whatsoever must retain the following 88 * acknowledgment: 89 * "This product includes software developed by the OpenSSL Project 90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)" 91 * 92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 103 * OF THE POSSIBILITY OF SUCH DAMAGE. 104 * ==================================================================== 105 * 106 * This product includes cryptographic software written by Eric Young 107 * (eay@cryptsoft.com). This product includes software written by Tim 108 * Hudson (tjh@cryptsoft.com). 109 * 110 */ 111/* ==================================================================== 112 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. 113 * 114 * Portions of the attached software ("Contribution") are developed by 115 * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project. 116 * 117 * The Contribution is licensed pursuant to the OpenSSL open source 118 * license provided above. 119 * 120 * ECC cipher suite support in OpenSSL originally written by 121 * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories. 122 * 123 */ 124/* ==================================================================== 125 * Copyright 2005 Nokia. All rights reserved. 126 * 127 * The portions of the attached software ("Contribution") is developed by 128 * Nokia Corporation and is licensed pursuant to the OpenSSL open source 129 * license. 130 * 131 * The Contribution, originally written by Mika Kousa and Pasi Eronen of 132 * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites 133 * support (see RFC 4279) to OpenSSL. 134 * 135 * No patent licenses or other rights except those expressly stated in 136 * the OpenSSL open source license shall be deemed granted or received 137 * expressly, by implication, estoppel, or otherwise. 138 * 139 * No assurances are provided by Nokia that the Contribution does not 140 * infringe the patent or other intellectual property rights of any third 141 * party or that the license provides you with all the necessary rights 142 * to make use of the Contribution. 143 * 144 * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN 145 * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA 146 * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY 147 * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR 148 * OTHERWISE. 149 */ 150 151#include <stdio.h> 152#include "ssl_locl.h" 153#include "kssl_lcl.h" 154#include <openssl/buffer.h> 155#include <openssl/rand.h> 156#include <openssl/objects.h> 157#include <openssl/evp.h> 158#include <openssl/md5.h> 159#ifdef OPENSSL_FIPS 160# include <openssl/fips.h> 161#endif 162#ifndef OPENSSL_NO_DH 163# include <openssl/dh.h> 164#endif 165#include <openssl/bn.h> 166#ifndef OPENSSL_NO_ENGINE 167# include <openssl/engine.h> 168#endif 169 170static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b); 171#ifndef OPENSSL_NO_TLSEXT 172static int ssl3_check_finished(SSL *s); 173#endif 174 175#ifndef OPENSSL_NO_SSL3_METHOD 176static const SSL_METHOD *ssl3_get_client_method(int ver) 177{ 178 if (ver == SSL3_VERSION) 179 return (SSLv3_client_method()); 180 else 181 return (NULL); 182} 183 184IMPLEMENT_ssl3_meth_func(SSLv3_client_method, 185 ssl_undefined_function, 186 ssl3_connect, ssl3_get_client_method) 187#endif 188int ssl3_connect(SSL *s) 189{ 190 BUF_MEM *buf = NULL; 191 unsigned long Time = (unsigned long)time(NULL); 192 void (*cb) (const SSL *ssl, int type, int val) = NULL; 193 int ret = -1; 194 int new_state, state, skip = 0; 195 196 RAND_add(&Time, sizeof(Time), 0); 197 ERR_clear_error(); 198 clear_sys_error(); 199 200 if (s->info_callback != NULL) 201 cb = s->info_callback; 202 else if (s->ctx->info_callback != NULL) 203 cb = s->ctx->info_callback; 204 205 s->in_handshake++; 206 if (!SSL_in_init(s) || SSL_in_before(s)) 207 SSL_clear(s); 208 209#ifndef OPENSSL_NO_HEARTBEATS 210 /* 211 * If we're awaiting a HeartbeatResponse, pretend we already got and 212 * don't await it anymore, because Heartbeats don't make sense during 213 * handshakes anyway. 214 */ 215 if (s->tlsext_hb_pending) { 216 s->tlsext_hb_pending = 0; 217 s->tlsext_hb_seq++; 218 } 219#endif 220 221 for (;;) { 222 state = s->state; 223 224 switch (s->state) { 225 case SSL_ST_RENEGOTIATE: 226 s->renegotiate = 1; 227 s->state = SSL_ST_CONNECT; 228 s->ctx->stats.sess_connect_renegotiate++; 229 /* break */ 230 case SSL_ST_BEFORE: 231 case SSL_ST_CONNECT: 232 case SSL_ST_BEFORE | SSL_ST_CONNECT: 233 case SSL_ST_OK | SSL_ST_CONNECT: 234 235 s->server = 0; 236 if (cb != NULL) 237 cb(s, SSL_CB_HANDSHAKE_START, 1); 238 239 if ((s->version & 0xff00) != 0x0300) { 240 SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR); 241 s->state = SSL_ST_ERR; 242 ret = -1; 243 goto end; 244 } 245 246 /* s->version=SSL3_VERSION; */ 247 s->type = SSL_ST_CONNECT; 248 249 if (s->init_buf == NULL) { 250 if ((buf = BUF_MEM_new()) == NULL) { 251 ret = -1; 252 s->state = SSL_ST_ERR; 253 goto end; 254 } 255 if (!BUF_MEM_grow(buf, SSL3_RT_MAX_PLAIN_LENGTH)) { 256 ret = -1; 257 s->state = SSL_ST_ERR; 258 goto end; 259 } 260 s->init_buf = buf; 261 buf = NULL; 262 } 263 264 if (!ssl3_setup_buffers(s)) { 265 ret = -1; 266 goto end; 267 } 268 269 /* setup buffing BIO */ 270 if (!ssl_init_wbio_buffer(s, 0)) { 271 ret = -1; 272 s->state = SSL_ST_ERR; 273 goto end; 274 } 275 276 /* don't push the buffering BIO quite yet */ 277 278 ssl3_init_finished_mac(s); 279 280 s->state = SSL3_ST_CW_CLNT_HELLO_A; 281 s->ctx->stats.sess_connect++; 282 s->init_num = 0; 283 s->s3->flags &= ~SSL3_FLAGS_CCS_OK; 284 /* 285 * Should have been reset by ssl3_get_finished, too. 286 */ 287 s->s3->change_cipher_spec = 0; 288 break; 289 290 case SSL3_ST_CW_CLNT_HELLO_A: 291 case SSL3_ST_CW_CLNT_HELLO_B: 292 293 s->shutdown = 0; 294 ret = ssl3_client_hello(s); 295 if (ret <= 0) 296 goto end; 297 s->state = SSL3_ST_CR_SRVR_HELLO_A; 298 s->init_num = 0; 299 300 /* turn on buffering for the next lot of output */ 301 if (s->bbio != s->wbio) 302 s->wbio = BIO_push(s->bbio, s->wbio); 303 304 break; 305 306 case SSL3_ST_CR_SRVR_HELLO_A: 307 case SSL3_ST_CR_SRVR_HELLO_B: 308 ret = ssl3_get_server_hello(s); 309 if (ret <= 0) 310 goto end; 311 312 if (s->hit) { 313 s->state = SSL3_ST_CR_FINISHED_A; 314#ifndef OPENSSL_NO_TLSEXT 315 if (s->tlsext_ticket_expected) { 316 /* receive renewed session ticket */ 317 s->state = SSL3_ST_CR_SESSION_TICKET_A; 318 } 319#endif 320 } else 321 s->state = SSL3_ST_CR_CERT_A; 322 s->init_num = 0; 323 break; 324 325 case SSL3_ST_CR_CERT_A: 326 case SSL3_ST_CR_CERT_B: 327#ifndef OPENSSL_NO_TLSEXT 328 /* Noop (ret = 0) for everything but EAP-FAST. */ 329 ret = ssl3_check_finished(s); 330 if (ret < 0) 331 goto end; 332 if (ret == 1) { 333 s->hit = 1; 334 s->state = SSL3_ST_CR_FINISHED_A; 335 s->init_num = 0; 336 break; 337 } 338#endif 339 /* Check if it is anon DH/ECDH, SRP auth */ 340 /* or PSK */ 341 if (! 342 (s->s3->tmp. 343 new_cipher->algorithm_auth & (SSL_aNULL | SSL_aSRP)) 344 && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) { 345 ret = ssl3_get_server_certificate(s); 346 if (ret <= 0) 347 goto end; 348#ifndef OPENSSL_NO_TLSEXT 349 if (s->tlsext_status_expected) 350 s->state = SSL3_ST_CR_CERT_STATUS_A; 351 else 352 s->state = SSL3_ST_CR_KEY_EXCH_A; 353 } else { 354 skip = 1; 355 s->state = SSL3_ST_CR_KEY_EXCH_A; 356 } 357#else 358 } else 359 skip = 1; 360 361 s->state = SSL3_ST_CR_KEY_EXCH_A; 362#endif 363 s->init_num = 0; 364 break; 365 366 case SSL3_ST_CR_KEY_EXCH_A: 367 case SSL3_ST_CR_KEY_EXCH_B: 368 ret = ssl3_get_key_exchange(s); 369 if (ret <= 0) 370 goto end; 371 s->state = SSL3_ST_CR_CERT_REQ_A; 372 s->init_num = 0; 373 374 /* 375 * at this point we check that we have the required stuff from 376 * the server 377 */ 378 if (!ssl3_check_cert_and_algorithm(s)) { 379 ret = -1; 380 s->state = SSL_ST_ERR; 381 goto end; 382 } 383 break; 384 385 case SSL3_ST_CR_CERT_REQ_A: 386 case SSL3_ST_CR_CERT_REQ_B: 387 ret = ssl3_get_certificate_request(s); 388 if (ret <= 0) 389 goto end; 390 s->state = SSL3_ST_CR_SRVR_DONE_A; 391 s->init_num = 0; 392 break; 393 394 case SSL3_ST_CR_SRVR_DONE_A: 395 case SSL3_ST_CR_SRVR_DONE_B: 396 ret = ssl3_get_server_done(s); 397 if (ret <= 0) 398 goto end; 399#ifndef OPENSSL_NO_SRP 400 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) { 401 if ((ret = SRP_Calc_A_param(s)) <= 0) { 402 SSLerr(SSL_F_SSL3_CONNECT, SSL_R_SRP_A_CALC); 403 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); 404 s->state = SSL_ST_ERR; 405 goto end; 406 } 407 } 408#endif 409 if (s->s3->tmp.cert_req) 410 s->state = SSL3_ST_CW_CERT_A; 411 else 412 s->state = SSL3_ST_CW_KEY_EXCH_A; 413 s->init_num = 0; 414 415 break; 416 417 case SSL3_ST_CW_CERT_A: 418 case SSL3_ST_CW_CERT_B: 419 case SSL3_ST_CW_CERT_C: 420 case SSL3_ST_CW_CERT_D: 421 ret = ssl3_send_client_certificate(s); 422 if (ret <= 0) 423 goto end; 424 s->state = SSL3_ST_CW_KEY_EXCH_A; 425 s->init_num = 0; 426 break; 427 428 case SSL3_ST_CW_KEY_EXCH_A: 429 case SSL3_ST_CW_KEY_EXCH_B: 430 ret = ssl3_send_client_key_exchange(s); 431 if (ret <= 0) 432 goto end; 433 /* 434 * EAY EAY EAY need to check for DH fix cert sent back 435 */ 436 /* 437 * For TLS, cert_req is set to 2, so a cert chain of nothing is 438 * sent, but no verify packet is sent 439 */ 440 /* 441 * XXX: For now, we do not support client authentication in ECDH 442 * cipher suites with ECDH (rather than ECDSA) certificates. We 443 * need to skip the certificate verify message when client's 444 * ECDH public key is sent inside the client certificate. 445 */ 446 if (s->s3->tmp.cert_req == 1) { 447 s->state = SSL3_ST_CW_CERT_VRFY_A; 448 } else { 449 s->state = SSL3_ST_CW_CHANGE_A; 450 } 451 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) { 452 s->state = SSL3_ST_CW_CHANGE_A; 453 } 454 455 s->init_num = 0; 456 break; 457 458 case SSL3_ST_CW_CERT_VRFY_A: 459 case SSL3_ST_CW_CERT_VRFY_B: 460 ret = ssl3_send_client_verify(s); 461 if (ret <= 0) 462 goto end; 463 s->state = SSL3_ST_CW_CHANGE_A; 464 s->init_num = 0; 465 break; 466 467 case SSL3_ST_CW_CHANGE_A: 468 case SSL3_ST_CW_CHANGE_B: 469 ret = ssl3_send_change_cipher_spec(s, 470 SSL3_ST_CW_CHANGE_A, 471 SSL3_ST_CW_CHANGE_B); 472 if (ret <= 0) 473 goto end; 474 475#if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG) 476 s->state = SSL3_ST_CW_FINISHED_A; 477#else 478 if (s->s3->next_proto_neg_seen) 479 s->state = SSL3_ST_CW_NEXT_PROTO_A; 480 else 481 s->state = SSL3_ST_CW_FINISHED_A; 482#endif 483 s->init_num = 0; 484 485 s->session->cipher = s->s3->tmp.new_cipher; 486#ifdef OPENSSL_NO_COMP 487 s->session->compress_meth = 0; 488#else 489 if (s->s3->tmp.new_compression == NULL) 490 s->session->compress_meth = 0; 491 else 492 s->session->compress_meth = s->s3->tmp.new_compression->id; 493#endif 494 if (!s->method->ssl3_enc->setup_key_block(s)) { 495 ret = -1; 496 s->state = SSL_ST_ERR; 497 goto end; 498 } 499 500 if (!s->method->ssl3_enc->change_cipher_state(s, 501 SSL3_CHANGE_CIPHER_CLIENT_WRITE)) 502 { 503 ret = -1; 504 s->state = SSL_ST_ERR; 505 goto end; 506 } 507 508 break; 509 510#if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG) 511 case SSL3_ST_CW_NEXT_PROTO_A: 512 case SSL3_ST_CW_NEXT_PROTO_B: 513 ret = ssl3_send_next_proto(s); 514 if (ret <= 0) 515 goto end; 516 s->state = SSL3_ST_CW_FINISHED_A; 517 break; 518#endif 519 520 case SSL3_ST_CW_FINISHED_A: 521 case SSL3_ST_CW_FINISHED_B: 522 ret = ssl3_send_finished(s, 523 SSL3_ST_CW_FINISHED_A, 524 SSL3_ST_CW_FINISHED_B, 525 s->method-> 526 ssl3_enc->client_finished_label, 527 s->method-> 528 ssl3_enc->client_finished_label_len); 529 if (ret <= 0) 530 goto end; 531 s->state = SSL3_ST_CW_FLUSH; 532 533 /* clear flags */ 534 s->s3->flags &= ~SSL3_FLAGS_POP_BUFFER; 535 if (s->hit) { 536 s->s3->tmp.next_state = SSL_ST_OK; 537 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED) { 538 s->state = SSL_ST_OK; 539 s->s3->flags |= SSL3_FLAGS_POP_BUFFER; 540 s->s3->delay_buf_pop_ret = 0; 541 } 542 } else { 543#ifndef OPENSSL_NO_TLSEXT 544 /* 545 * Allow NewSessionTicket if ticket expected 546 */ 547 if (s->tlsext_ticket_expected) 548 s->s3->tmp.next_state = SSL3_ST_CR_SESSION_TICKET_A; 549 else 550#endif 551 552 s->s3->tmp.next_state = SSL3_ST_CR_FINISHED_A; 553 } 554 s->init_num = 0; 555 break; 556 557#ifndef OPENSSL_NO_TLSEXT 558 case SSL3_ST_CR_SESSION_TICKET_A: 559 case SSL3_ST_CR_SESSION_TICKET_B: 560 ret = ssl3_get_new_session_ticket(s); 561 if (ret <= 0) 562 goto end; 563 s->state = SSL3_ST_CR_FINISHED_A; 564 s->init_num = 0; 565 break; 566 567 case SSL3_ST_CR_CERT_STATUS_A: 568 case SSL3_ST_CR_CERT_STATUS_B: 569 ret = ssl3_get_cert_status(s); 570 if (ret <= 0) 571 goto end; 572 s->state = SSL3_ST_CR_KEY_EXCH_A; 573 s->init_num = 0; 574 break; 575#endif 576 577 case SSL3_ST_CR_FINISHED_A: 578 case SSL3_ST_CR_FINISHED_B: 579 if (!s->s3->change_cipher_spec) 580 s->s3->flags |= SSL3_FLAGS_CCS_OK; 581 ret = ssl3_get_finished(s, SSL3_ST_CR_FINISHED_A, 582 SSL3_ST_CR_FINISHED_B); 583 if (ret <= 0) 584 goto end; 585 586 if (s->hit) 587 s->state = SSL3_ST_CW_CHANGE_A; 588 else 589 s->state = SSL_ST_OK; 590 s->init_num = 0; 591 break; 592 593 case SSL3_ST_CW_FLUSH: 594 s->rwstate = SSL_WRITING; 595 if (BIO_flush(s->wbio) <= 0) { 596 ret = -1; 597 goto end; 598 } 599 s->rwstate = SSL_NOTHING; 600 s->state = s->s3->tmp.next_state; 601 break; 602 603 case SSL_ST_OK: 604 /* clean a few things up */ 605 ssl3_cleanup_key_block(s); 606 607 if (s->init_buf != NULL) { 608 BUF_MEM_free(s->init_buf); 609 s->init_buf = NULL; 610 } 611 612 /* 613 * If we are not 'joining' the last two packets, remove the 614 * buffering now 615 */ 616 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER)) 617 ssl_free_wbio_buffer(s); 618 /* else do it later in ssl3_write */ 619 620 s->init_num = 0; 621 s->renegotiate = 0; 622 s->new_session = 0; 623 624 ssl_update_cache(s, SSL_SESS_CACHE_CLIENT); 625 if (s->hit) 626 s->ctx->stats.sess_hit++; 627 628 ret = 1; 629 /* s->server=0; */ 630 s->handshake_func = ssl3_connect; 631 s->ctx->stats.sess_connect_good++; 632 633 if (cb != NULL) 634 cb(s, SSL_CB_HANDSHAKE_DONE, 1); 635 636 goto end; 637 /* break; */ 638 639 case SSL_ST_ERR: 640 default: 641 SSLerr(SSL_F_SSL3_CONNECT, SSL_R_UNKNOWN_STATE); 642 ret = -1; 643 goto end; 644 /* break; */ 645 } 646 647 /* did we do anything */ 648 if (!s->s3->tmp.reuse_message && !skip) { 649 if (s->debug) { 650 if ((ret = BIO_flush(s->wbio)) <= 0) 651 goto end; 652 } 653 654 if ((cb != NULL) && (s->state != state)) { 655 new_state = s->state; 656 s->state = state; 657 cb(s, SSL_CB_CONNECT_LOOP, 1); 658 s->state = new_state; 659 } 660 } 661 skip = 0; 662 } 663 end: 664 s->in_handshake--; 665 if (buf != NULL) 666 BUF_MEM_free(buf); 667 if (cb != NULL) 668 cb(s, SSL_CB_CONNECT_EXIT, ret); 669 return (ret); 670} 671 672int ssl3_client_hello(SSL *s) 673{ 674 unsigned char *buf; 675 unsigned char *p, *d; 676 int i; 677 unsigned long l; 678#ifndef OPENSSL_NO_COMP 679 int j; 680 SSL_COMP *comp; 681#endif 682 683 buf = (unsigned char *)s->init_buf->data; 684 if (s->state == SSL3_ST_CW_CLNT_HELLO_A) { 685 SSL_SESSION *sess = s->session; 686 if ((sess == NULL) || (sess->ssl_version != s->version) || 687#ifdef OPENSSL_NO_TLSEXT 688 !sess->session_id_length || 689#else 690 /* 691 * In the case of EAP-FAST, we can have a pre-shared 692 * "ticket" without a session ID. 693 */ 694 (!sess->session_id_length && !sess->tlsext_tick) || 695#endif 696 (sess->not_resumable)) { 697 if (!ssl_get_new_session(s, 0)) 698 goto err; 699 } 700 /* else use the pre-loaded session */ 701 702 p = s->s3->client_random; 703 704 if (ssl_fill_hello_random(s, 0, p, SSL3_RANDOM_SIZE) <= 0) 705 goto err; 706 707 /* Do the message type and length last */ 708 d = p = &(buf[4]); 709 710 /*- 711 * version indicates the negotiated version: for example from 712 * an SSLv2/v3 compatible client hello). The client_version 713 * field is the maximum version we permit and it is also 714 * used in RSA encrypted premaster secrets. Some servers can 715 * choke if we initially report a higher version then 716 * renegotiate to a lower one in the premaster secret. This 717 * didn't happen with TLS 1.0 as most servers supported it 718 * but it can with TLS 1.1 or later if the server only supports 719 * 1.0. 720 * 721 * Possible scenario with previous logic: 722 * 1. Client hello indicates TLS 1.2 723 * 2. Server hello says TLS 1.0 724 * 3. RSA encrypted premaster secret uses 1.2. 725 * 4. Handhaked proceeds using TLS 1.0. 726 * 5. Server sends hello request to renegotiate. 727 * 6. Client hello indicates TLS v1.0 as we now 728 * know that is maximum server supports. 729 * 7. Server chokes on RSA encrypted premaster secret 730 * containing version 1.0. 731 * 732 * For interoperability it should be OK to always use the 733 * maximum version we support in client hello and then rely 734 * on the checking of version to ensure the servers isn't 735 * being inconsistent: for example initially negotiating with 736 * TLS 1.0 and renegotiating with TLS 1.2. We do this by using 737 * client_version in client hello and not resetting it to 738 * the negotiated version. 739 */ 740#if 0 741 *(p++) = s->version >> 8; 742 *(p++) = s->version & 0xff; 743 s->client_version = s->version; 744#else 745 *(p++) = s->client_version >> 8; 746 *(p++) = s->client_version & 0xff; 747#endif 748 749 /* Random stuff */ 750 memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE); 751 p += SSL3_RANDOM_SIZE; 752 753 /* Session ID */ 754 if (s->new_session) 755 i = 0; 756 else 757 i = s->session->session_id_length; 758 *(p++) = i; 759 if (i != 0) { 760 if (i > (int)sizeof(s->session->session_id)) { 761 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); 762 goto err; 763 } 764 memcpy(p, s->session->session_id, i); 765 p += i; 766 } 767 768 /* Ciphers supported */ 769 i = ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), &(p[2]), 0); 770 if (i == 0) { 771 SSLerr(SSL_F_SSL3_CLIENT_HELLO, SSL_R_NO_CIPHERS_AVAILABLE); 772 goto err; 773 } 774#ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH 775 /* 776 * Some servers hang if client hello > 256 bytes as hack workaround 777 * chop number of supported ciphers to keep it well below this if we 778 * use TLS v1.2 779 */ 780 if (TLS1_get_version(s) >= TLS1_2_VERSION 781 && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH) 782 i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1; 783#endif 784 s2n(i, p); 785 p += i; 786 787 /* COMPRESSION */ 788#ifdef OPENSSL_NO_COMP 789 *(p++) = 1; 790#else 791 792 if ((s->options & SSL_OP_NO_COMPRESSION) 793 || !s->ctx->comp_methods) 794 j = 0; 795 else 796 j = sk_SSL_COMP_num(s->ctx->comp_methods); 797 *(p++) = 1 + j; 798 for (i = 0; i < j; i++) { 799 comp = sk_SSL_COMP_value(s->ctx->comp_methods, i); 800 *(p++) = comp->id; 801 } 802#endif 803 *(p++) = 0; /* Add the NULL method */ 804 805#ifndef OPENSSL_NO_TLSEXT 806 /* TLS extensions */ 807 if (ssl_prepare_clienthello_tlsext(s) <= 0) { 808 SSLerr(SSL_F_SSL3_CLIENT_HELLO, SSL_R_CLIENTHELLO_TLSEXT); 809 goto err; 810 } 811 if ((p = 812 ssl_add_clienthello_tlsext(s, p, 813 buf + SSL3_RT_MAX_PLAIN_LENGTH)) == 814 NULL) { 815 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); 816 goto err; 817 } 818#endif 819 820 l = (p - d); 821 d = buf; 822 *(d++) = SSL3_MT_CLIENT_HELLO; 823 l2n3(l, d); 824 825 s->state = SSL3_ST_CW_CLNT_HELLO_B; 826 /* number of bytes to write */ 827 s->init_num = p - buf; 828 s->init_off = 0; 829 } 830 831 /* SSL3_ST_CW_CLNT_HELLO_B */ 832 return (ssl3_do_write(s, SSL3_RT_HANDSHAKE)); 833 err: 834 s->state = SSL_ST_ERR; 835 return (-1); 836} 837 838int ssl3_get_server_hello(SSL *s) 839{ 840 STACK_OF(SSL_CIPHER) *sk; 841 const SSL_CIPHER *c; 842 unsigned char *p, *d; 843 int i, al, ok; 844 unsigned int j; 845 long n; 846#ifndef OPENSSL_NO_COMP 847 SSL_COMP *comp; 848#endif 849 850 n = s->method->ssl_get_message(s, 851 SSL3_ST_CR_SRVR_HELLO_A, 852 SSL3_ST_CR_SRVR_HELLO_B, -1, 20000, &ok); 853 854 if (!ok) 855 return ((int)n); 856 857 if (SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER) { 858 if (s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST) { 859 if (s->d1->send_cookie == 0) { 860 s->s3->tmp.reuse_message = 1; 861 return 1; 862 } else { /* already sent a cookie */ 863 864 al = SSL_AD_UNEXPECTED_MESSAGE; 865 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_BAD_MESSAGE_TYPE); 866 goto f_err; 867 } 868 } 869 } 870 871 if (s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO) { 872 al = SSL_AD_UNEXPECTED_MESSAGE; 873 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_BAD_MESSAGE_TYPE); 874 goto f_err; 875 } 876 877 d = p = (unsigned char *)s->init_msg; 878 879 if ((p[0] != (s->version >> 8)) || (p[1] != (s->version & 0xff))) { 880 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_WRONG_SSL_VERSION); 881 s->version = (s->version & 0xff00) | p[1]; 882 al = SSL_AD_PROTOCOL_VERSION; 883 goto f_err; 884 } 885 p += 2; 886 887 /* load the server hello data */ 888 /* load the server random */ 889 memcpy(s->s3->server_random, p, SSL3_RANDOM_SIZE); 890 p += SSL3_RANDOM_SIZE; 891 892 s->hit = 0; 893 894 /* get the session-id */ 895 j = *(p++); 896 897 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE)) { 898 al = SSL_AD_ILLEGAL_PARAMETER; 899 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_SSL3_SESSION_ID_TOO_LONG); 900 goto f_err; 901 } 902#ifndef OPENSSL_NO_TLSEXT 903 /* 904 * Check if we can resume the session based on external pre-shared secret. 905 * EAP-FAST (RFC 4851) supports two types of session resumption. 906 * Resumption based on server-side state works with session IDs. 907 * Resumption based on pre-shared Protected Access Credentials (PACs) 908 * works by overriding the SessionTicket extension at the application 909 * layer, and does not send a session ID. (We do not know whether EAP-FAST 910 * servers would honour the session ID.) Therefore, the session ID alone 911 * is not a reliable indicator of session resumption, so we first check if 912 * we can resume, and later peek at the next handshake message to see if the 913 * server wants to resume. 914 */ 915 if (s->version >= TLS1_VERSION && s->tls_session_secret_cb && 916 s->session->tlsext_tick) { 917 SSL_CIPHER *pref_cipher = NULL; 918 s->session->master_key_length = sizeof(s->session->master_key); 919 if (s->tls_session_secret_cb(s, s->session->master_key, 920 &s->session->master_key_length, 921 NULL, &pref_cipher, 922 s->tls_session_secret_cb_arg)) { 923 s->session->cipher = pref_cipher ? 924 pref_cipher : ssl_get_cipher_by_char(s, p + j); 925 } else { 926 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, ERR_R_INTERNAL_ERROR); 927 al = SSL_AD_INTERNAL_ERROR; 928 goto f_err; 929 } 930 } 931#endif /* OPENSSL_NO_TLSEXT */ 932 933 if (j != 0 && j == s->session->session_id_length 934 && memcmp(p, s->session->session_id, j) == 0) { 935 if (s->sid_ctx_length != s->session->sid_ctx_length 936 || memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) { 937 /* actually a client application bug */ 938 al = SSL_AD_ILLEGAL_PARAMETER; 939 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, 940 SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); 941 goto f_err; 942 } 943 s->hit = 1; 944 } else { 945 /* 946 * If we were trying for session-id reuse but the server 947 * didn't echo the ID, make a new SSL_SESSION. 948 * In the case of EAP-FAST and PAC, we do not send a session ID, 949 * so the PAC-based session secret is always preserved. It'll be 950 * overwritten if the server refuses resumption. 951 */ 952 if (s->session->session_id_length > 0) { 953 if (!ssl_get_new_session(s, 0)) { 954 al = SSL_AD_INTERNAL_ERROR; 955 goto f_err; 956 } 957 } 958 s->session->session_id_length = j; 959 memcpy(s->session->session_id, p, j); /* j could be 0 */ 960 } 961 p += j; 962 c = ssl_get_cipher_by_char(s, p); 963 if (c == NULL) { 964 /* unknown cipher */ 965 al = SSL_AD_ILLEGAL_PARAMETER; 966 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_UNKNOWN_CIPHER_RETURNED); 967 goto f_err; 968 } 969 /* TLS v1.2 only ciphersuites require v1.2 or later */ 970 if ((c->algorithm_ssl & SSL_TLSV1_2) && 971 (TLS1_get_version(s) < TLS1_2_VERSION)) { 972 al = SSL_AD_ILLEGAL_PARAMETER; 973 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED); 974 goto f_err; 975 } 976#ifndef OPENSSL_NO_SRP 977 if (((c->algorithm_mkey & SSL_kSRP) || (c->algorithm_auth & SSL_aSRP)) && 978 !(s->srp_ctx.srp_Mask & SSL_kSRP)) { 979 al = SSL_AD_ILLEGAL_PARAMETER; 980 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED); 981 goto f_err; 982 } 983#endif /* OPENSSL_NO_SRP */ 984 p += ssl_put_cipher_by_char(s, NULL, NULL); 985 986 sk = ssl_get_ciphers_by_id(s); 987 i = sk_SSL_CIPHER_find(sk, c); 988 if (i < 0) { 989 /* we did not say we would use this cipher */ 990 al = SSL_AD_ILLEGAL_PARAMETER; 991 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED); 992 goto f_err; 993 } 994 995 /* 996 * Depending on the session caching (internal/external), the cipher 997 * and/or cipher_id values may not be set. Make sure that cipher_id is 998 * set and use it for comparison. 999 */ 1000 if (s->session->cipher) 1001 s->session->cipher_id = s->session->cipher->id; 1002 if (s->hit && (s->session->cipher_id != c->id)) { 1003/* Workaround is now obsolete */ 1004#if 0 1005 if (!(s->options & SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG)) 1006#endif 1007 { 1008 al = SSL_AD_ILLEGAL_PARAMETER; 1009 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, 1010 SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); 1011 goto f_err; 1012 } 1013 } 1014 s->s3->tmp.new_cipher = c; 1015 /* 1016 * Don't digest cached records if TLS v1.2: we may need them for client 1017 * authentication. 1018 */ 1019 if (TLS1_get_version(s) < TLS1_2_VERSION 1020 && !ssl3_digest_cached_records(s)) { 1021 al = SSL_AD_INTERNAL_ERROR; 1022 goto f_err; 1023 } 1024 /* lets get the compression algorithm */ 1025 /* COMPRESSION */ 1026#ifdef OPENSSL_NO_COMP 1027 if (*(p++) != 0) { 1028 al = SSL_AD_ILLEGAL_PARAMETER; 1029 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, 1030 SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); 1031 goto f_err; 1032 } 1033 /* 1034 * If compression is disabled we'd better not try to resume a session 1035 * using compression. 1036 */ 1037 if (s->session->compress_meth != 0) { 1038 al = SSL_AD_INTERNAL_ERROR; 1039 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_INCONSISTENT_COMPRESSION); 1040 goto f_err; 1041 } 1042#else 1043 j = *(p++); 1044 if (s->hit && j != s->session->compress_meth) { 1045 al = SSL_AD_ILLEGAL_PARAMETER; 1046 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, 1047 SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED); 1048 goto f_err; 1049 } 1050 if (j == 0) 1051 comp = NULL; 1052 else if (s->options & SSL_OP_NO_COMPRESSION) { 1053 al = SSL_AD_ILLEGAL_PARAMETER; 1054 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_COMPRESSION_DISABLED); 1055 goto f_err; 1056 } else 1057 comp = ssl3_comp_find(s->ctx->comp_methods, j); 1058 1059 if ((j != 0) && (comp == NULL)) { 1060 al = SSL_AD_ILLEGAL_PARAMETER; 1061 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, 1062 SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); 1063 goto f_err; 1064 } else { 1065 s->s3->tmp.new_compression = comp; 1066 } 1067#endif 1068 1069#ifndef OPENSSL_NO_TLSEXT 1070 /* TLS extensions */ 1071 if (s->version >= SSL3_VERSION) { 1072 if (!ssl_parse_serverhello_tlsext(s, &p, d, n, &al)) { 1073 /* 'al' set by ssl_parse_serverhello_tlsext */ 1074 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_PARSE_TLSEXT); 1075 goto f_err; 1076 } 1077 if (ssl_check_serverhello_tlsext(s) <= 0) { 1078 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_SERVERHELLO_TLSEXT); 1079 goto err; 1080 } 1081 } 1082#endif 1083 1084 if (p != (d + n)) { 1085 /* wrong packet length */ 1086 al = SSL_AD_DECODE_ERROR; 1087 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_BAD_PACKET_LENGTH); 1088 goto f_err; 1089 } 1090 1091 return (1); 1092 f_err: 1093 ssl3_send_alert(s, SSL3_AL_FATAL, al); 1094 err: 1095 s->state = SSL_ST_ERR; 1096 return (-1); 1097} 1098 1099int ssl3_get_server_certificate(SSL *s) 1100{ 1101 int al, i, ok, ret = -1; 1102 unsigned long n, nc, llen, l; 1103 X509 *x = NULL; 1104 const unsigned char *q, *p; 1105 unsigned char *d; 1106 STACK_OF(X509) *sk = NULL; 1107 SESS_CERT *sc; 1108 EVP_PKEY *pkey = NULL; 1109 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == 1110 * KRB5 */ 1111 1112 n = s->method->ssl_get_message(s, 1113 SSL3_ST_CR_CERT_A, 1114 SSL3_ST_CR_CERT_B, 1115 -1, s->max_cert_list, &ok); 1116 1117 if (!ok) 1118 return ((int)n); 1119 1120 if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) || 1121 ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) && 1122 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE))) { 1123 s->s3->tmp.reuse_message = 1; 1124 return (1); 1125 } 1126 1127 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE) { 1128 al = SSL_AD_UNEXPECTED_MESSAGE; 1129 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, SSL_R_BAD_MESSAGE_TYPE); 1130 goto f_err; 1131 } 1132 p = d = (unsigned char *)s->init_msg; 1133 1134 if ((sk = sk_X509_new_null()) == NULL) { 1135 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); 1136 goto err; 1137 } 1138 1139 n2l3(p, llen); 1140 if (llen + 3 != n) { 1141 al = SSL_AD_DECODE_ERROR; 1142 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, SSL_R_LENGTH_MISMATCH); 1143 goto f_err; 1144 } 1145 for (nc = 0; nc < llen;) { 1146 if (nc + 3 > llen) { 1147 al = SSL_AD_DECODE_ERROR; 1148 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 1149 SSL_R_CERT_LENGTH_MISMATCH); 1150 goto f_err; 1151 } 1152 n2l3(p, l); 1153 if ((l + nc + 3) > llen) { 1154 al = SSL_AD_DECODE_ERROR; 1155 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 1156 SSL_R_CERT_LENGTH_MISMATCH); 1157 goto f_err; 1158 } 1159 1160 q = p; 1161 x = d2i_X509(NULL, &q, l); 1162 if (x == NULL) { 1163 al = SSL_AD_BAD_CERTIFICATE; 1164 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, ERR_R_ASN1_LIB); 1165 goto f_err; 1166 } 1167 if (q != (p + l)) { 1168 al = SSL_AD_DECODE_ERROR; 1169 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 1170 SSL_R_CERT_LENGTH_MISMATCH); 1171 goto f_err; 1172 } 1173 if (!sk_X509_push(sk, x)) { 1174 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); 1175 goto err; 1176 } 1177 x = NULL; 1178 nc += l + 3; 1179 p = q; 1180 } 1181 1182 i = ssl_verify_cert_chain(s, sk); 1183 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0) 1184#ifndef OPENSSL_NO_KRB5 1185 && !((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) && 1186 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5)) 1187#endif /* OPENSSL_NO_KRB5 */ 1188 ) { 1189 al = ssl_verify_alarm_type(s->verify_result); 1190 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 1191 SSL_R_CERTIFICATE_VERIFY_FAILED); 1192 goto f_err; 1193 } 1194 ERR_clear_error(); /* but we keep s->verify_result */ 1195 1196 sc = ssl_sess_cert_new(); 1197 if (sc == NULL) 1198 goto err; 1199 1200 if (s->session->sess_cert) 1201 ssl_sess_cert_free(s->session->sess_cert); 1202 s->session->sess_cert = sc; 1203 1204 sc->cert_chain = sk; 1205 /* 1206 * Inconsistency alert: cert_chain does include the peer's certificate, 1207 * which we don't include in s3_srvr.c 1208 */ 1209 x = sk_X509_value(sk, 0); 1210 sk = NULL; 1211 /* 1212 * VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end 1213 */ 1214 1215 pkey = X509_get_pubkey(x); 1216 1217 /* VRS: allow null cert if auth == KRB5 */ 1218 need_cert = ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) && 1219 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5)) 1220 ? 0 : 1; 1221 1222#ifdef KSSL_DEBUG 1223 fprintf(stderr, "pkey,x = %p, %p\n", pkey, x); 1224 fprintf(stderr, "ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x, pkey)); 1225 fprintf(stderr, "cipher, alg, nc = %s, %lx, %lx, %d\n", 1226 s->s3->tmp.new_cipher->name, 1227 s->s3->tmp.new_cipher->algorithm_mkey, 1228 s->s3->tmp.new_cipher->algorithm_auth, need_cert); 1229#endif /* KSSL_DEBUG */ 1230 1231 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey))) { 1232 x = NULL; 1233 al = SSL3_AL_FATAL; 1234 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 1235 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); 1236 goto f_err; 1237 } 1238 1239 i = ssl_cert_type(x, pkey); 1240 if (need_cert && i < 0) { 1241 x = NULL; 1242 al = SSL3_AL_FATAL; 1243 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 1244 SSL_R_UNKNOWN_CERTIFICATE_TYPE); 1245 goto f_err; 1246 } 1247 1248 if (need_cert) { 1249 sc->peer_cert_type = i; 1250 CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509); 1251 /* 1252 * Why would the following ever happen? We just created sc a couple 1253 * of lines ago. 1254 */ 1255 if (sc->peer_pkeys[i].x509 != NULL) 1256 X509_free(sc->peer_pkeys[i].x509); 1257 sc->peer_pkeys[i].x509 = x; 1258 sc->peer_key = &(sc->peer_pkeys[i]); 1259 1260 if (s->session->peer != NULL) 1261 X509_free(s->session->peer); 1262 CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509); 1263 s->session->peer = x; 1264 } else { 1265 sc->peer_cert_type = i; 1266 sc->peer_key = NULL; 1267 1268 if (s->session->peer != NULL) 1269 X509_free(s->session->peer); 1270 s->session->peer = NULL; 1271 } 1272 s->session->verify_result = s->verify_result; 1273 1274 x = NULL; 1275 ret = 1; 1276 1277 if (0) { 1278 f_err: 1279 ssl3_send_alert(s, SSL3_AL_FATAL, al); 1280 err: 1281 s->state = SSL_ST_ERR; 1282 } 1283 1284 EVP_PKEY_free(pkey); 1285 X509_free(x); 1286 sk_X509_pop_free(sk, X509_free); 1287 return (ret); 1288} 1289 1290int ssl3_get_key_exchange(SSL *s) 1291{ 1292#ifndef OPENSSL_NO_RSA 1293 unsigned char *q, md_buf[EVP_MAX_MD_SIZE * 2]; 1294#endif 1295 EVP_MD_CTX md_ctx; 1296 unsigned char *param, *p; 1297 int al, j, ok; 1298 long i, param_len, n, alg_k, alg_a; 1299 EVP_PKEY *pkey = NULL; 1300 const EVP_MD *md = NULL; 1301#ifndef OPENSSL_NO_RSA 1302 RSA *rsa = NULL; 1303#endif 1304#ifndef OPENSSL_NO_DH 1305 DH *dh = NULL; 1306#endif 1307#ifndef OPENSSL_NO_ECDH 1308 EC_KEY *ecdh = NULL; 1309 BN_CTX *bn_ctx = NULL; 1310 EC_POINT *srvr_ecpoint = NULL; 1311 int curve_nid = 0; 1312 int encoded_pt_len = 0; 1313#endif 1314 1315 EVP_MD_CTX_init(&md_ctx); 1316 1317 /* 1318 * use same message size as in ssl3_get_certificate_request() as 1319 * ServerKeyExchange message may be skipped 1320 */ 1321 n = s->method->ssl_get_message(s, 1322 SSL3_ST_CR_KEY_EXCH_A, 1323 SSL3_ST_CR_KEY_EXCH_B, 1324 -1, s->max_cert_list, &ok); 1325 if (!ok) 1326 return ((int)n); 1327 1328 alg_k = s->s3->tmp.new_cipher->algorithm_mkey; 1329 1330 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE) { 1331 /* 1332 * Can't skip server key exchange if this is an ephemeral 1333 * ciphersuite. 1334 */ 1335 if (alg_k & (SSL_kEDH | SSL_kEECDH)) { 1336 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); 1337 al = SSL_AD_UNEXPECTED_MESSAGE; 1338 goto f_err; 1339 } 1340#ifndef OPENSSL_NO_PSK 1341 /* 1342 * In plain PSK ciphersuite, ServerKeyExchange can be omitted if no 1343 * identity hint is sent. Set session->sess_cert anyway to avoid 1344 * problems later. 1345 */ 1346 if (alg_k & SSL_kPSK) { 1347 s->session->sess_cert = ssl_sess_cert_new(); 1348 if (s->ctx->psk_identity_hint) 1349 OPENSSL_free(s->ctx->psk_identity_hint); 1350 s->ctx->psk_identity_hint = NULL; 1351 } 1352#endif 1353 s->s3->tmp.reuse_message = 1; 1354 return (1); 1355 } 1356 1357 param = p = (unsigned char *)s->init_msg; 1358 if (s->session->sess_cert != NULL) { 1359#ifndef OPENSSL_NO_RSA 1360 if (s->session->sess_cert->peer_rsa_tmp != NULL) { 1361 RSA_free(s->session->sess_cert->peer_rsa_tmp); 1362 s->session->sess_cert->peer_rsa_tmp = NULL; 1363 } 1364#endif 1365#ifndef OPENSSL_NO_DH 1366 if (s->session->sess_cert->peer_dh_tmp) { 1367 DH_free(s->session->sess_cert->peer_dh_tmp); 1368 s->session->sess_cert->peer_dh_tmp = NULL; 1369 } 1370#endif 1371#ifndef OPENSSL_NO_ECDH 1372 if (s->session->sess_cert->peer_ecdh_tmp) { 1373 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp); 1374 s->session->sess_cert->peer_ecdh_tmp = NULL; 1375 } 1376#endif 1377 } else { 1378 s->session->sess_cert = ssl_sess_cert_new(); 1379 } 1380 1381 /* Total length of the parameters including the length prefix */ 1382 param_len = 0; 1383 1384 alg_a = s->s3->tmp.new_cipher->algorithm_auth; 1385 1386 al = SSL_AD_DECODE_ERROR; 1387 1388#ifndef OPENSSL_NO_PSK 1389 if (alg_k & SSL_kPSK) { 1390 param_len = 2; 1391 if (param_len > n) { 1392 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); 1393 goto f_err; 1394 } 1395 n2s(p, i); 1396 1397 /* 1398 * Store PSK identity hint for later use, hint is used in 1399 * ssl3_send_client_key_exchange. Assume that the maximum length of 1400 * a PSK identity hint can be as long as the maximum length of a PSK 1401 * identity. 1402 */ 1403 if (i > PSK_MAX_IDENTITY_LEN) { 1404 al = SSL_AD_HANDSHAKE_FAILURE; 1405 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_DATA_LENGTH_TOO_LONG); 1406 goto f_err; 1407 } 1408 if (i > n - param_len) { 1409 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1410 SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH); 1411 goto f_err; 1412 } 1413 param_len += i; 1414 1415 s->session->psk_identity_hint = BUF_strndup((char *)p, i); 1416 if (s->session->psk_identity_hint == NULL) { 1417 al = SSL_AD_HANDSHAKE_FAILURE; 1418 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); 1419 goto f_err; 1420 } 1421 1422 p += i; 1423 n -= param_len; 1424 } else 1425#endif /* !OPENSSL_NO_PSK */ 1426#ifndef OPENSSL_NO_SRP 1427 if (alg_k & SSL_kSRP) { 1428 param_len = 2; 1429 if (param_len > n) { 1430 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); 1431 goto f_err; 1432 } 1433 n2s(p, i); 1434 1435 if (i > n - param_len) { 1436 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SRP_N_LENGTH); 1437 goto f_err; 1438 } 1439 param_len += i; 1440 1441 if (!(s->srp_ctx.N = BN_bin2bn(p, i, NULL))) { 1442 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); 1443 goto err; 1444 } 1445 p += i; 1446 1447 if (2 > n - param_len) { 1448 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); 1449 goto f_err; 1450 } 1451 param_len += 2; 1452 1453 n2s(p, i); 1454 1455 if (i > n - param_len) { 1456 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SRP_G_LENGTH); 1457 goto f_err; 1458 } 1459 param_len += i; 1460 1461 if (!(s->srp_ctx.g = BN_bin2bn(p, i, NULL))) { 1462 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); 1463 goto err; 1464 } 1465 p += i; 1466 1467 if (1 > n - param_len) { 1468 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); 1469 goto f_err; 1470 } 1471 param_len += 1; 1472 1473 i = (unsigned int)(p[0]); 1474 p++; 1475 1476 if (i > n - param_len) { 1477 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SRP_S_LENGTH); 1478 goto f_err; 1479 } 1480 param_len += i; 1481 1482 if (!(s->srp_ctx.s = BN_bin2bn(p, i, NULL))) { 1483 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); 1484 goto err; 1485 } 1486 p += i; 1487 1488 if (2 > n - param_len) { 1489 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); 1490 goto f_err; 1491 } 1492 param_len += 2; 1493 1494 n2s(p, i); 1495 1496 if (i > n - param_len) { 1497 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SRP_B_LENGTH); 1498 goto f_err; 1499 } 1500 param_len += i; 1501 1502 if (!(s->srp_ctx.B = BN_bin2bn(p, i, NULL))) { 1503 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); 1504 goto err; 1505 } 1506 p += i; 1507 n -= param_len; 1508 1509 if (!srp_verify_server_param(s, &al)) { 1510 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SRP_PARAMETERS); 1511 goto f_err; 1512 } 1513 1514/* We must check if there is a certificate */ 1515# ifndef OPENSSL_NO_RSA 1516 if (alg_a & SSL_aRSA) 1517 pkey = 1518 X509_get_pubkey(s->session-> 1519 sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1520# else 1521 if (0) ; 1522# endif 1523# ifndef OPENSSL_NO_DSA 1524 else if (alg_a & SSL_aDSS) 1525 pkey = 1526 X509_get_pubkey(s->session-> 1527 sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN]. 1528 x509); 1529# endif 1530 } else 1531#endif /* !OPENSSL_NO_SRP */ 1532#ifndef OPENSSL_NO_RSA 1533 if (alg_k & SSL_kRSA) { 1534 /* Temporary RSA keys only allowed in export ciphersuites */ 1535 if (!SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)) { 1536 al = SSL_AD_UNEXPECTED_MESSAGE; 1537 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); 1538 goto f_err; 1539 } 1540 if ((rsa = RSA_new()) == NULL) { 1541 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); 1542 goto err; 1543 } 1544 1545 param_len = 2; 1546 if (param_len > n) { 1547 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); 1548 goto f_err; 1549 } 1550 n2s(p, i); 1551 1552 if (i > n - param_len) { 1553 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_RSA_MODULUS_LENGTH); 1554 goto f_err; 1555 } 1556 param_len += i; 1557 1558 if (!(rsa->n = BN_bin2bn(p, i, rsa->n))) { 1559 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); 1560 goto err; 1561 } 1562 p += i; 1563 1564 if (2 > n - param_len) { 1565 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); 1566 goto f_err; 1567 } 1568 param_len += 2; 1569 1570 n2s(p, i); 1571 1572 if (i > n - param_len) { 1573 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_RSA_E_LENGTH); 1574 goto f_err; 1575 } 1576 param_len += i; 1577 1578 if (!(rsa->e = BN_bin2bn(p, i, rsa->e))) { 1579 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); 1580 goto err; 1581 } 1582 p += i; 1583 n -= param_len; 1584 1585 /* this should be because we are using an export cipher */ 1586 if (alg_a & SSL_aRSA) 1587 pkey = 1588 X509_get_pubkey(s->session-> 1589 sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1590 else { 1591 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); 1592 goto err; 1593 } 1594 1595 if (EVP_PKEY_bits(pkey) <= SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) { 1596 al = SSL_AD_UNEXPECTED_MESSAGE; 1597 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); 1598 goto f_err; 1599 } 1600 1601 s->session->sess_cert->peer_rsa_tmp = rsa; 1602 rsa = NULL; 1603 } 1604#else /* OPENSSL_NO_RSA */ 1605 if (0) ; 1606#endif 1607#ifndef OPENSSL_NO_DH 1608 else if (alg_k & SSL_kEDH) { 1609 if ((dh = DH_new()) == NULL) { 1610 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_DH_LIB); 1611 goto err; 1612 } 1613 1614 param_len = 2; 1615 if (param_len > n) { 1616 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); 1617 goto f_err; 1618 } 1619 n2s(p, i); 1620 1621 if (i > n - param_len) { 1622 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_DH_P_LENGTH); 1623 goto f_err; 1624 } 1625 param_len += i; 1626 1627 if (!(dh->p = BN_bin2bn(p, i, NULL))) { 1628 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); 1629 goto err; 1630 } 1631 p += i; 1632 1633 if (2 > n - param_len) { 1634 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); 1635 goto f_err; 1636 } 1637 param_len += 2; 1638 1639 n2s(p, i); 1640 1641 if (i > n - param_len) { 1642 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_DH_G_LENGTH); 1643 goto f_err; 1644 } 1645 param_len += i; 1646 1647 if (!(dh->g = BN_bin2bn(p, i, NULL))) { 1648 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); 1649 goto err; 1650 } 1651 p += i; 1652 1653 if (2 > n - param_len) { 1654 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); 1655 goto f_err; 1656 } 1657 param_len += 2; 1658 1659 n2s(p, i); 1660 1661 if (i > n - param_len) { 1662 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_DH_PUB_KEY_LENGTH); 1663 goto f_err; 1664 } 1665 param_len += i; 1666 1667 if (!(dh->pub_key = BN_bin2bn(p, i, NULL))) { 1668 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); 1669 goto err; 1670 } 1671 p += i; 1672 n -= param_len; 1673 1674# ifndef OPENSSL_NO_RSA 1675 if (alg_a & SSL_aRSA) 1676 pkey = 1677 X509_get_pubkey(s->session-> 1678 sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1679# else 1680 if (0) ; 1681# endif 1682# ifndef OPENSSL_NO_DSA 1683 else if (alg_a & SSL_aDSS) 1684 pkey = 1685 X509_get_pubkey(s->session-> 1686 sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN]. 1687 x509); 1688# endif 1689 /* else anonymous DH, so no certificate or pkey. */ 1690 1691 s->session->sess_cert->peer_dh_tmp = dh; 1692 dh = NULL; 1693 } else if ((alg_k & SSL_kDHr) || (alg_k & SSL_kDHd)) { 1694 al = SSL_AD_ILLEGAL_PARAMETER; 1695 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1696 SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER); 1697 goto f_err; 1698 } 1699#endif /* !OPENSSL_NO_DH */ 1700 1701#ifndef OPENSSL_NO_ECDH 1702 else if (alg_k & SSL_kEECDH) { 1703 EC_GROUP *ngroup; 1704 const EC_GROUP *group; 1705 1706 if ((ecdh = EC_KEY_new()) == NULL) { 1707 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); 1708 goto err; 1709 } 1710 1711 /* 1712 * Extract elliptic curve parameters and the server's ephemeral ECDH 1713 * public key. Keep accumulating lengths of various components in 1714 * param_len and make sure it never exceeds n. 1715 */ 1716 1717 /* 1718 * XXX: For now we only support named (not generic) curves and the 1719 * ECParameters in this case is just three bytes. We also need one 1720 * byte for the length of the encoded point 1721 */ 1722 param_len = 4; 1723 if (param_len > n) { 1724 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); 1725 goto f_err; 1726 } 1727 1728 if ((*p != NAMED_CURVE_TYPE) || 1729 ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0)) { 1730 al = SSL_AD_INTERNAL_ERROR; 1731 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1732 SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); 1733 goto f_err; 1734 } 1735 1736 ngroup = EC_GROUP_new_by_curve_name(curve_nid); 1737 if (ngroup == NULL) { 1738 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_EC_LIB); 1739 goto err; 1740 } 1741 if (EC_KEY_set_group(ecdh, ngroup) == 0) { 1742 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_EC_LIB); 1743 goto err; 1744 } 1745 EC_GROUP_free(ngroup); 1746 1747 group = EC_KEY_get0_group(ecdh); 1748 1749 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && 1750 (EC_GROUP_get_degree(group) > 163)) { 1751 al = SSL_AD_EXPORT_RESTRICTION; 1752 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1753 SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER); 1754 goto f_err; 1755 } 1756 1757 p += 3; 1758 1759 /* Next, get the encoded ECPoint */ 1760 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) || 1761 ((bn_ctx = BN_CTX_new()) == NULL)) { 1762 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); 1763 goto err; 1764 } 1765 1766 encoded_pt_len = *p; /* length of encoded point */ 1767 p += 1; 1768 1769 if ((encoded_pt_len > n - param_len) || 1770 (EC_POINT_oct2point(group, srvr_ecpoint, 1771 p, encoded_pt_len, bn_ctx) == 0)) { 1772 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_ECPOINT); 1773 goto f_err; 1774 } 1775 param_len += encoded_pt_len; 1776 1777 n -= param_len; 1778 p += encoded_pt_len; 1779 1780 /* 1781 * The ECC/TLS specification does not mention the use of DSA to sign 1782 * ECParameters in the server key exchange message. We do support RSA 1783 * and ECDSA. 1784 */ 1785 if (0) ; 1786# ifndef OPENSSL_NO_RSA 1787 else if (alg_a & SSL_aRSA) 1788 pkey = 1789 X509_get_pubkey(s->session-> 1790 sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1791# endif 1792# ifndef OPENSSL_NO_ECDSA 1793 else if (alg_a & SSL_aECDSA) 1794 pkey = 1795 X509_get_pubkey(s->session-> 1796 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509); 1797# endif 1798 /* else anonymous ECDH, so no certificate or pkey. */ 1799 EC_KEY_set_public_key(ecdh, srvr_ecpoint); 1800 s->session->sess_cert->peer_ecdh_tmp = ecdh; 1801 ecdh = NULL; 1802 BN_CTX_free(bn_ctx); 1803 bn_ctx = NULL; 1804 EC_POINT_free(srvr_ecpoint); 1805 srvr_ecpoint = NULL; 1806 } else if (alg_k) { 1807 al = SSL_AD_UNEXPECTED_MESSAGE; 1808 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); 1809 goto f_err; 1810 } 1811#endif /* !OPENSSL_NO_ECDH */ 1812 1813 /* p points to the next byte, there are 'n' bytes left */ 1814 1815 /* if it was signed, check the signature */ 1816 if (pkey != NULL) { 1817 if (TLS1_get_version(s) >= TLS1_2_VERSION) { 1818 int sigalg; 1819 if (2 > n) { 1820 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); 1821 goto f_err; 1822 } 1823 1824 sigalg = tls12_get_sigid(pkey); 1825 /* Should never happen */ 1826 if (sigalg == -1) { 1827 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); 1828 goto err; 1829 } 1830 /* Check key type is consistent with signature */ 1831 if (sigalg != (int)p[1]) { 1832 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1833 SSL_R_WRONG_SIGNATURE_TYPE); 1834 al = SSL_AD_DECODE_ERROR; 1835 goto f_err; 1836 } 1837 md = tls12_get_hash(p[0]); 1838 if (md == NULL) { 1839 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNKNOWN_DIGEST); 1840 goto f_err; 1841 } 1842#ifdef SSL_DEBUG 1843 fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md)); 1844#endif 1845 p += 2; 1846 n -= 2; 1847 } else 1848 md = EVP_sha1(); 1849 1850 if (2 > n) { 1851 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); 1852 goto f_err; 1853 } 1854 n2s(p, i); 1855 n -= 2; 1856 j = EVP_PKEY_size(pkey); 1857 1858 /* 1859 * Check signature length. If n is 0 then signature is empty 1860 */ 1861 if ((i != n) || (n > j) || (n <= 0)) { 1862 /* wrong packet length */ 1863 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_WRONG_SIGNATURE_LENGTH); 1864 goto f_err; 1865 } 1866#ifndef OPENSSL_NO_RSA 1867 if (pkey->type == EVP_PKEY_RSA 1868 && TLS1_get_version(s) < TLS1_2_VERSION) { 1869 int num; 1870 unsigned int size; 1871 1872 j = 0; 1873 q = md_buf; 1874 for (num = 2; num > 0; num--) { 1875 EVP_MD_CTX_set_flags(&md_ctx, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW); 1876 EVP_DigestInit_ex(&md_ctx, (num == 2) 1877 ? s->ctx->md5 : s->ctx->sha1, NULL); 1878 EVP_DigestUpdate(&md_ctx, &(s->s3->client_random[0]), 1879 SSL3_RANDOM_SIZE); 1880 EVP_DigestUpdate(&md_ctx, &(s->s3->server_random[0]), 1881 SSL3_RANDOM_SIZE); 1882 EVP_DigestUpdate(&md_ctx, param, param_len); 1883 EVP_DigestFinal_ex(&md_ctx, q, &size); 1884 q += size; 1885 j += size; 1886 } 1887 i = RSA_verify(NID_md5_sha1, md_buf, j, p, n, pkey->pkey.rsa); 1888 if (i < 0) { 1889 al = SSL_AD_DECRYPT_ERROR; 1890 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_RSA_DECRYPT); 1891 goto f_err; 1892 } 1893 if (i == 0) { 1894 /* bad signature */ 1895 al = SSL_AD_DECRYPT_ERROR; 1896 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE); 1897 goto f_err; 1898 } 1899 } else 1900#endif 1901 { 1902 EVP_VerifyInit_ex(&md_ctx, md, NULL); 1903 EVP_VerifyUpdate(&md_ctx, &(s->s3->client_random[0]), 1904 SSL3_RANDOM_SIZE); 1905 EVP_VerifyUpdate(&md_ctx, &(s->s3->server_random[0]), 1906 SSL3_RANDOM_SIZE); 1907 EVP_VerifyUpdate(&md_ctx, param, param_len); 1908 if (EVP_VerifyFinal(&md_ctx, p, (int)n, pkey) <= 0) { 1909 /* bad signature */ 1910 al = SSL_AD_DECRYPT_ERROR; 1911 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE); 1912 goto f_err; 1913 } 1914 } 1915 } else { 1916 /* aNULL, aSRP or kPSK do not need public keys */ 1917 if (!(alg_a & (SSL_aNULL | SSL_aSRP)) && !(alg_k & SSL_kPSK)) { 1918 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); 1919 goto err; 1920 } 1921 /* still data left over */ 1922 if (n != 0) { 1923 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_EXTRA_DATA_IN_MESSAGE); 1924 goto f_err; 1925 } 1926 } 1927 EVP_PKEY_free(pkey); 1928 EVP_MD_CTX_cleanup(&md_ctx); 1929 return (1); 1930 f_err: 1931 ssl3_send_alert(s, SSL3_AL_FATAL, al); 1932 err: 1933 EVP_PKEY_free(pkey); 1934#ifndef OPENSSL_NO_RSA 1935 if (rsa != NULL) 1936 RSA_free(rsa); 1937#endif 1938#ifndef OPENSSL_NO_DH 1939 if (dh != NULL) 1940 DH_free(dh); 1941#endif 1942#ifndef OPENSSL_NO_ECDH 1943 BN_CTX_free(bn_ctx); 1944 EC_POINT_free(srvr_ecpoint); 1945 if (ecdh != NULL) 1946 EC_KEY_free(ecdh); 1947#endif 1948 EVP_MD_CTX_cleanup(&md_ctx); 1949 s->state = SSL_ST_ERR; 1950 return (-1); 1951} 1952 1953int ssl3_get_certificate_request(SSL *s) 1954{ 1955 int ok, ret = 0; 1956 unsigned long n, nc, l; 1957 unsigned int llen, ctype_num, i; 1958 X509_NAME *xn = NULL; 1959 const unsigned char *p, *q; 1960 unsigned char *d; 1961 STACK_OF(X509_NAME) *ca_sk = NULL; 1962 1963 n = s->method->ssl_get_message(s, 1964 SSL3_ST_CR_CERT_REQ_A, 1965 SSL3_ST_CR_CERT_REQ_B, 1966 -1, s->max_cert_list, &ok); 1967 1968 if (!ok) 1969 return ((int)n); 1970 1971 s->s3->tmp.cert_req = 0; 1972 1973 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE) { 1974 s->s3->tmp.reuse_message = 1; 1975 /* 1976 * If we get here we don't need any cached handshake records as we 1977 * wont be doing client auth. 1978 */ 1979 if (s->s3->handshake_buffer) { 1980 if (!ssl3_digest_cached_records(s)) 1981 goto err; 1982 } 1983 return (1); 1984 } 1985 1986 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST) { 1987 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE); 1988 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, SSL_R_WRONG_MESSAGE_TYPE); 1989 goto err; 1990 } 1991 1992 /* TLS does not like anon-DH with client cert */ 1993 if (s->version > SSL3_VERSION) { 1994 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) { 1995 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE); 1996 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, 1997 SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER); 1998 goto err; 1999 } 2000 } 2001 2002 p = d = (unsigned char *)s->init_msg; 2003 2004 if ((ca_sk = sk_X509_NAME_new(ca_dn_cmp)) == NULL) { 2005 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); 2006 goto err; 2007 } 2008 2009 /* get the certificate types */ 2010 ctype_num = *(p++); 2011 if (ctype_num > SSL3_CT_NUMBER) 2012 ctype_num = SSL3_CT_NUMBER; 2013 for (i = 0; i < ctype_num; i++) 2014 s->s3->tmp.ctype[i] = p[i]; 2015 p += ctype_num; 2016 if (TLS1_get_version(s) >= TLS1_2_VERSION) { 2017 n2s(p, llen); 2018 /* 2019 * Check we have enough room for signature algorithms and following 2020 * length value. 2021 */ 2022 if ((unsigned long)(p - d + llen + 2) > n) { 2023 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); 2024 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, 2025 SSL_R_DATA_LENGTH_TOO_LONG); 2026 goto err; 2027 } 2028 if ((llen & 1) || !tls1_process_sigalgs(s, p, llen)) { 2029 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); 2030 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, 2031 SSL_R_SIGNATURE_ALGORITHMS_ERROR); 2032 goto err; 2033 } 2034 p += llen; 2035 } 2036 2037 /* get the CA RDNs */ 2038 n2s(p, llen); 2039#if 0 2040 { 2041 FILE *out; 2042 out = fopen("/tmp/vsign.der", "w"); 2043 fwrite(p, 1, llen, out); 2044 fclose(out); 2045 } 2046#endif 2047 2048 if ((unsigned long)(p - d + llen) != n) { 2049 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); 2050 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH); 2051 goto err; 2052 } 2053 2054 for (nc = 0; nc < llen;) { 2055 if (nc + 2 > llen) { 2056 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); 2057 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, SSL_R_CA_DN_TOO_LONG); 2058 goto err; 2059 } 2060 n2s(p, l); 2061 if ((l + nc + 2) > llen) { 2062 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG)) 2063 goto cont; /* netscape bugs */ 2064 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); 2065 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, SSL_R_CA_DN_TOO_LONG); 2066 goto err; 2067 } 2068 2069 q = p; 2070 2071 if ((xn = d2i_X509_NAME(NULL, &q, l)) == NULL) { 2072 /* If netscape tolerance is on, ignore errors */ 2073 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG) 2074 goto cont; 2075 else { 2076 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); 2077 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_ASN1_LIB); 2078 goto err; 2079 } 2080 } 2081 2082 if (q != (p + l)) { 2083 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); 2084 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, 2085 SSL_R_CA_DN_LENGTH_MISMATCH); 2086 goto err; 2087 } 2088 if (!sk_X509_NAME_push(ca_sk, xn)) { 2089 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); 2090 goto err; 2091 } 2092 2093 p += l; 2094 nc += l + 2; 2095 } 2096 2097 if (0) { 2098 cont: 2099 ERR_clear_error(); 2100 } 2101 2102 /* we should setup a certificate to return.... */ 2103 s->s3->tmp.cert_req = 1; 2104 s->s3->tmp.ctype_num = ctype_num; 2105 if (s->s3->tmp.ca_names != NULL) 2106 sk_X509_NAME_pop_free(s->s3->tmp.ca_names, X509_NAME_free); 2107 s->s3->tmp.ca_names = ca_sk; 2108 ca_sk = NULL; 2109 2110 ret = 1; 2111 goto done; 2112 err: 2113 s->state = SSL_ST_ERR; 2114 done: 2115 if (ca_sk != NULL) 2116 sk_X509_NAME_pop_free(ca_sk, X509_NAME_free); 2117 return (ret); 2118} 2119 2120static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b) 2121{ 2122 return (X509_NAME_cmp(*a, *b)); 2123} 2124 2125#ifndef OPENSSL_NO_TLSEXT 2126int ssl3_get_new_session_ticket(SSL *s) 2127{ 2128 int ok, al, ret = 0, ticklen; 2129 long n; 2130 const unsigned char *p; 2131 unsigned char *d; 2132 2133 n = s->method->ssl_get_message(s, 2134 SSL3_ST_CR_SESSION_TICKET_A, 2135 SSL3_ST_CR_SESSION_TICKET_B, 2136 SSL3_MT_NEWSESSION_TICKET, 16384, &ok); 2137 2138 if (!ok) 2139 return ((int)n); 2140 2141 if (n < 6) { 2142 /* need at least ticket_lifetime_hint + ticket length */ 2143 al = SSL_AD_DECODE_ERROR; 2144 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); 2145 goto f_err; 2146 } 2147 2148 p = d = (unsigned char *)s->init_msg; 2149 2150 if (s->session->session_id_length > 0) { 2151 int i = s->session_ctx->session_cache_mode; 2152 SSL_SESSION *new_sess; 2153 /* 2154 * We reused an existing session, so we need to replace it with a new 2155 * one 2156 */ 2157 if (i & SSL_SESS_CACHE_CLIENT) { 2158 /* 2159 * Remove the old session from the cache 2160 */ 2161 if (i & SSL_SESS_CACHE_NO_INTERNAL_STORE) { 2162 if (s->session_ctx->remove_session_cb != NULL) 2163 s->session_ctx->remove_session_cb(s->session_ctx, 2164 s->session); 2165 } else { 2166 /* We carry on if this fails */ 2167 SSL_CTX_remove_session(s->session_ctx, s->session); 2168 } 2169 } 2170 2171 if ((new_sess = ssl_session_dup(s->session, 0)) == 0) { 2172 al = SSL_AD_INTERNAL_ERROR; 2173 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); 2174 goto f_err; 2175 } 2176 2177 SSL_SESSION_free(s->session); 2178 s->session = new_sess; 2179 } 2180 2181 n2l(p, s->session->tlsext_tick_lifetime_hint); 2182 n2s(p, ticklen); 2183 /* ticket_lifetime_hint + ticket_length + ticket */ 2184 if (ticklen + 6 != n) { 2185 al = SSL_AD_DECODE_ERROR; 2186 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); 2187 goto f_err; 2188 } 2189 if (s->session->tlsext_tick) { 2190 OPENSSL_free(s->session->tlsext_tick); 2191 s->session->tlsext_ticklen = 0; 2192 } 2193 s->session->tlsext_tick = OPENSSL_malloc(ticklen); 2194 if (!s->session->tlsext_tick) { 2195 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); 2196 goto err; 2197 } 2198 memcpy(s->session->tlsext_tick, p, ticklen); 2199 s->session->tlsext_ticklen = ticklen; 2200 /* 2201 * There are two ways to detect a resumed ticket session. One is to set 2202 * an appropriate session ID and then the server must return a match in 2203 * ServerHello. This allows the normal client session ID matching to work 2204 * and we know much earlier that the ticket has been accepted. The 2205 * other way is to set zero length session ID when the ticket is 2206 * presented and rely on the handshake to determine session resumption. 2207 * We choose the former approach because this fits in with assumptions 2208 * elsewhere in OpenSSL. The session ID is set to the SHA256 (or SHA1 is 2209 * SHA256 is disabled) hash of the ticket. 2210 */ 2211 EVP_Digest(p, ticklen, 2212 s->session->session_id, &s->session->session_id_length, 2213# ifndef OPENSSL_NO_SHA256 2214 EVP_sha256(), NULL); 2215# else 2216 EVP_sha1(), NULL); 2217# endif 2218 ret = 1; 2219 return (ret); 2220 f_err: 2221 ssl3_send_alert(s, SSL3_AL_FATAL, al); 2222 err: 2223 s->state = SSL_ST_ERR; 2224 return (-1); 2225} 2226 2227int ssl3_get_cert_status(SSL *s) 2228{ 2229 int ok, al; 2230 unsigned long resplen, n; 2231 const unsigned char *p; 2232 2233 n = s->method->ssl_get_message(s, 2234 SSL3_ST_CR_CERT_STATUS_A, 2235 SSL3_ST_CR_CERT_STATUS_B, 2236 SSL3_MT_CERTIFICATE_STATUS, 16384, &ok); 2237 2238 if (!ok) 2239 return ((int)n); 2240 if (n < 4) { 2241 /* need at least status type + length */ 2242 al = SSL_AD_DECODE_ERROR; 2243 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, SSL_R_LENGTH_MISMATCH); 2244 goto f_err; 2245 } 2246 p = (unsigned char *)s->init_msg; 2247 if (*p++ != TLSEXT_STATUSTYPE_ocsp) { 2248 al = SSL_AD_DECODE_ERROR; 2249 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, SSL_R_UNSUPPORTED_STATUS_TYPE); 2250 goto f_err; 2251 } 2252 n2l3(p, resplen); 2253 if (resplen + 4 != n) { 2254 al = SSL_AD_DECODE_ERROR; 2255 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, SSL_R_LENGTH_MISMATCH); 2256 goto f_err; 2257 } 2258 if (s->tlsext_ocsp_resp) 2259 OPENSSL_free(s->tlsext_ocsp_resp); 2260 s->tlsext_ocsp_resp = BUF_memdup(p, resplen); 2261 if (!s->tlsext_ocsp_resp) { 2262 al = SSL_AD_INTERNAL_ERROR; 2263 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, ERR_R_MALLOC_FAILURE); 2264 goto f_err; 2265 } 2266 s->tlsext_ocsp_resplen = resplen; 2267 if (s->ctx->tlsext_status_cb) { 2268 int ret; 2269 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg); 2270 if (ret == 0) { 2271 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE; 2272 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, SSL_R_INVALID_STATUS_RESPONSE); 2273 goto f_err; 2274 } 2275 if (ret < 0) { 2276 al = SSL_AD_INTERNAL_ERROR; 2277 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, ERR_R_MALLOC_FAILURE); 2278 goto f_err; 2279 } 2280 } 2281 return 1; 2282 f_err: 2283 ssl3_send_alert(s, SSL3_AL_FATAL, al); 2284 s->state = SSL_ST_ERR; 2285 return (-1); 2286} 2287#endif 2288 2289int ssl3_get_server_done(SSL *s) 2290{ 2291 int ok, ret = 0; 2292 long n; 2293 2294 /* Second to last param should be very small, like 0 :-) */ 2295 n = s->method->ssl_get_message(s, 2296 SSL3_ST_CR_SRVR_DONE_A, 2297 SSL3_ST_CR_SRVR_DONE_B, 2298 SSL3_MT_SERVER_DONE, 30, &ok); 2299 2300 if (!ok) 2301 return ((int)n); 2302 if (n > 0) { 2303 /* should contain no data */ 2304 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); 2305 SSLerr(SSL_F_SSL3_GET_SERVER_DONE, SSL_R_LENGTH_MISMATCH); 2306 s->state = SSL_ST_ERR; 2307 return -1; 2308 } 2309 ret = 1; 2310 return (ret); 2311} 2312 2313int ssl3_send_client_key_exchange(SSL *s) 2314{ 2315 unsigned char *p, *d; 2316 int n; 2317 unsigned long alg_k; 2318#ifndef OPENSSL_NO_RSA 2319 unsigned char *q; 2320 EVP_PKEY *pkey = NULL; 2321#endif 2322#ifndef OPENSSL_NO_KRB5 2323 KSSL_ERR kssl_err; 2324#endif /* OPENSSL_NO_KRB5 */ 2325#ifndef OPENSSL_NO_ECDH 2326 EC_KEY *clnt_ecdh = NULL; 2327 const EC_POINT *srvr_ecpoint = NULL; 2328 EVP_PKEY *srvr_pub_pkey = NULL; 2329 unsigned char *encodedPoint = NULL; 2330 int encoded_pt_len = 0; 2331 BN_CTX *bn_ctx = NULL; 2332#endif 2333 2334 if (s->state == SSL3_ST_CW_KEY_EXCH_A) { 2335 d = (unsigned char *)s->init_buf->data; 2336 p = &(d[4]); 2337 2338 alg_k = s->s3->tmp.new_cipher->algorithm_mkey; 2339 2340 /* Fool emacs indentation */ 2341 if (0) { 2342 } 2343#ifndef OPENSSL_NO_RSA 2344 else if (alg_k & SSL_kRSA) { 2345 RSA *rsa; 2346 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; 2347 2348 if (s->session->sess_cert == NULL) { 2349 /* 2350 * We should always have a server certificate with SSL_kRSA. 2351 */ 2352 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2353 ERR_R_INTERNAL_ERROR); 2354 goto err; 2355 } 2356 2357 if (s->session->sess_cert->peer_rsa_tmp != NULL) 2358 rsa = s->session->sess_cert->peer_rsa_tmp; 2359 else { 2360 pkey = 2361 X509_get_pubkey(s->session-> 2362 sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC]. 2363 x509); 2364 if ((pkey == NULL) || (pkey->type != EVP_PKEY_RSA) 2365 || (pkey->pkey.rsa == NULL)) { 2366 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2367 ERR_R_INTERNAL_ERROR); 2368 goto err; 2369 } 2370 rsa = pkey->pkey.rsa; 2371 EVP_PKEY_free(pkey); 2372 } 2373 2374 tmp_buf[0] = s->client_version >> 8; 2375 tmp_buf[1] = s->client_version & 0xff; 2376 if (RAND_bytes(&(tmp_buf[2]), sizeof tmp_buf - 2) <= 0) 2377 goto err; 2378 2379 s->session->master_key_length = sizeof tmp_buf; 2380 2381 q = p; 2382 /* Fix buf for TLS and beyond */ 2383 if (s->version > SSL3_VERSION) 2384 p += 2; 2385 n = RSA_public_encrypt(sizeof tmp_buf, 2386 tmp_buf, p, rsa, RSA_PKCS1_PADDING); 2387# ifdef PKCS1_CHECK 2388 if (s->options & SSL_OP_PKCS1_CHECK_1) 2389 p[1]++; 2390 if (s->options & SSL_OP_PKCS1_CHECK_2) 2391 tmp_buf[0] = 0x70; 2392# endif 2393 if (n <= 0) { 2394 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2395 SSL_R_BAD_RSA_ENCRYPT); 2396 goto err; 2397 } 2398 2399 /* Fix buf for TLS and beyond */ 2400 if (s->version > SSL3_VERSION) { 2401 s2n(n, q); 2402 n += 2; 2403 } 2404 2405 s->session->master_key_length = 2406 s->method->ssl3_enc->generate_master_secret(s, 2407 s-> 2408 session->master_key, 2409 tmp_buf, 2410 sizeof tmp_buf); 2411 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf); 2412 } 2413#endif 2414#ifndef OPENSSL_NO_KRB5 2415 else if (alg_k & SSL_kKRB5) { 2416 krb5_error_code krb5rc; 2417 KSSL_CTX *kssl_ctx = s->kssl_ctx; 2418 /* krb5_data krb5_ap_req; */ 2419 krb5_data *enc_ticket; 2420 krb5_data authenticator, *authp = NULL; 2421 EVP_CIPHER_CTX ciph_ctx; 2422 const EVP_CIPHER *enc = NULL; 2423 unsigned char iv[EVP_MAX_IV_LENGTH]; 2424 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; 2425 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH + EVP_MAX_IV_LENGTH]; 2426 int padl, outl = sizeof(epms); 2427 2428 EVP_CIPHER_CTX_init(&ciph_ctx); 2429 2430# ifdef KSSL_DEBUG 2431 fprintf(stderr, "ssl3_send_client_key_exchange(%lx & %lx)\n", 2432 alg_k, SSL_kKRB5); 2433# endif /* KSSL_DEBUG */ 2434 2435 authp = NULL; 2436# ifdef KRB5SENDAUTH 2437 if (KRB5SENDAUTH) 2438 authp = &authenticator; 2439# endif /* KRB5SENDAUTH */ 2440 2441 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp, &kssl_err); 2442 enc = kssl_map_enc(kssl_ctx->enctype); 2443 if (enc == NULL) 2444 goto err; 2445# ifdef KSSL_DEBUG 2446 { 2447 fprintf(stderr, "kssl_cget_tkt rtn %d\n", krb5rc); 2448 if (krb5rc && kssl_err.text) 2449 fprintf(stderr, "kssl_cget_tkt kssl_err=%s\n", 2450 kssl_err.text); 2451 } 2452# endif /* KSSL_DEBUG */ 2453 2454 if (krb5rc) { 2455 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); 2456 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, kssl_err.reason); 2457 goto err; 2458 } 2459 2460 /*- 2461 * 20010406 VRS - Earlier versions used KRB5 AP_REQ 2462 * in place of RFC 2712 KerberosWrapper, as in: 2463 * 2464 * Send ticket (copy to *p, set n = length) 2465 * n = krb5_ap_req.length; 2466 * memcpy(p, krb5_ap_req.data, krb5_ap_req.length); 2467 * if (krb5_ap_req.data) 2468 * kssl_krb5_free_data_contents(NULL,&krb5_ap_req); 2469 * 2470 * Now using real RFC 2712 KerberosWrapper 2471 * (Thanks to Simon Wilkinson <sxw@sxw.org.uk>) 2472 * Note: 2712 "opaque" types are here replaced 2473 * with a 2-byte length followed by the value. 2474 * Example: 2475 * KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms 2476 * Where "xx xx" = length bytes. Shown here with 2477 * optional authenticator omitted. 2478 */ 2479 2480 /* KerberosWrapper.Ticket */ 2481 s2n(enc_ticket->length, p); 2482 memcpy(p, enc_ticket->data, enc_ticket->length); 2483 p += enc_ticket->length; 2484 n = enc_ticket->length + 2; 2485 2486 /* KerberosWrapper.Authenticator */ 2487 if (authp && authp->length) { 2488 s2n(authp->length, p); 2489 memcpy(p, authp->data, authp->length); 2490 p += authp->length; 2491 n += authp->length + 2; 2492 2493 free(authp->data); 2494 authp->data = NULL; 2495 authp->length = 0; 2496 } else { 2497 s2n(0, p); /* null authenticator length */ 2498 n += 2; 2499 } 2500 2501 tmp_buf[0] = s->client_version >> 8; 2502 tmp_buf[1] = s->client_version & 0xff; 2503 if (RAND_bytes(&(tmp_buf[2]), sizeof tmp_buf - 2) <= 0) 2504 goto err; 2505 2506 /*- 2507 * 20010420 VRS. Tried it this way; failed. 2508 * EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL); 2509 * EVP_CIPHER_CTX_set_key_length(&ciph_ctx, 2510 * kssl_ctx->length); 2511 * EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv); 2512 */ 2513 2514 memset(iv, 0, sizeof iv); /* per RFC 1510 */ 2515 EVP_EncryptInit_ex(&ciph_ctx, enc, NULL, kssl_ctx->key, iv); 2516 EVP_EncryptUpdate(&ciph_ctx, epms, &outl, tmp_buf, 2517 sizeof tmp_buf); 2518 EVP_EncryptFinal_ex(&ciph_ctx, &(epms[outl]), &padl); 2519 outl += padl; 2520 if (outl > (int)sizeof epms) { 2521 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2522 ERR_R_INTERNAL_ERROR); 2523 goto err; 2524 } 2525 EVP_CIPHER_CTX_cleanup(&ciph_ctx); 2526 2527 /* KerberosWrapper.EncryptedPreMasterSecret */ 2528 s2n(outl, p); 2529 memcpy(p, epms, outl); 2530 p += outl; 2531 n += outl + 2; 2532 2533 s->session->master_key_length = 2534 s->method->ssl3_enc->generate_master_secret(s, 2535 s-> 2536 session->master_key, 2537 tmp_buf, 2538 sizeof tmp_buf); 2539 2540 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf); 2541 OPENSSL_cleanse(epms, outl); 2542 } 2543#endif 2544#ifndef OPENSSL_NO_DH 2545 else if (alg_k & (SSL_kEDH | SSL_kDHr | SSL_kDHd)) { 2546 DH *dh_srvr, *dh_clnt; 2547 2548 if (s->session->sess_cert == NULL) { 2549 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE); 2550 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2551 SSL_R_UNEXPECTED_MESSAGE); 2552 goto err; 2553 } 2554 2555 if (s->session->sess_cert->peer_dh_tmp != NULL) 2556 dh_srvr = s->session->sess_cert->peer_dh_tmp; 2557 else { 2558 /* we get them from the cert */ 2559 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); 2560 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2561 SSL_R_UNABLE_TO_FIND_DH_PARAMETERS); 2562 goto err; 2563 } 2564 2565 /* generate a new random key */ 2566 if ((dh_clnt = DHparams_dup(dh_srvr)) == NULL) { 2567 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB); 2568 goto err; 2569 } 2570 if (!DH_generate_key(dh_clnt)) { 2571 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB); 2572 DH_free(dh_clnt); 2573 goto err; 2574 } 2575 2576 /* 2577 * use the 'p' output buffer for the DH key, but make sure to 2578 * clear it out afterwards 2579 */ 2580 2581 n = DH_compute_key(p, dh_srvr->pub_key, dh_clnt); 2582 2583 if (n <= 0) { 2584 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB); 2585 DH_free(dh_clnt); 2586 goto err; 2587 } 2588 2589 /* generate master key from the result */ 2590 s->session->master_key_length = 2591 s->method->ssl3_enc->generate_master_secret(s, 2592 s-> 2593 session->master_key, 2594 p, n); 2595 /* clean up */ 2596 memset(p, 0, n); 2597 2598 /* send off the data */ 2599 n = BN_num_bytes(dh_clnt->pub_key); 2600 s2n(n, p); 2601 BN_bn2bin(dh_clnt->pub_key, p); 2602 n += 2; 2603 2604 DH_free(dh_clnt); 2605 } 2606#endif 2607 2608#ifndef OPENSSL_NO_ECDH 2609 else if (alg_k & (SSL_kEECDH | SSL_kECDHr | SSL_kECDHe)) { 2610 const EC_GROUP *srvr_group = NULL; 2611 EC_KEY *tkey; 2612 int ecdh_clnt_cert = 0; 2613 int field_size = 0; 2614 2615 if (s->session->sess_cert == NULL) { 2616 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE); 2617 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2618 SSL_R_UNEXPECTED_MESSAGE); 2619 goto err; 2620 } 2621 2622 /* 2623 * Did we send out the client's ECDH share for use in premaster 2624 * computation as part of client certificate? If so, set 2625 * ecdh_clnt_cert to 1. 2626 */ 2627 if ((alg_k & (SSL_kECDHr | SSL_kECDHe)) && (s->cert != NULL)) { 2628 /*- 2629 * XXX: For now, we do not support client 2630 * authentication using ECDH certificates. 2631 * To add such support, one needs to add 2632 * code that checks for appropriate 2633 * conditions and sets ecdh_clnt_cert to 1. 2634 * For example, the cert have an ECC 2635 * key on the same curve as the server's 2636 * and the key should be authorized for 2637 * key agreement. 2638 * 2639 * One also needs to add code in ssl3_connect 2640 * to skip sending the certificate verify 2641 * message. 2642 * 2643 * if ((s->cert->key->privatekey != NULL) && 2644 * (s->cert->key->privatekey->type == 2645 * EVP_PKEY_EC) && ...) 2646 * ecdh_clnt_cert = 1; 2647 */ 2648 } 2649 2650 if (s->session->sess_cert->peer_ecdh_tmp != NULL) { 2651 tkey = s->session->sess_cert->peer_ecdh_tmp; 2652 } else { 2653 /* Get the Server Public Key from Cert */ 2654 srvr_pub_pkey = 2655 X509_get_pubkey(s->session-> 2656 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509); 2657 if ((srvr_pub_pkey == NULL) 2658 || (srvr_pub_pkey->type != EVP_PKEY_EC) 2659 || (srvr_pub_pkey->pkey.ec == NULL)) { 2660 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2661 ERR_R_INTERNAL_ERROR); 2662 goto err; 2663 } 2664 2665 tkey = srvr_pub_pkey->pkey.ec; 2666 } 2667 2668 srvr_group = EC_KEY_get0_group(tkey); 2669 srvr_ecpoint = EC_KEY_get0_public_key(tkey); 2670 2671 if ((srvr_group == NULL) || (srvr_ecpoint == NULL)) { 2672 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2673 ERR_R_INTERNAL_ERROR); 2674 goto err; 2675 } 2676 2677 if ((clnt_ecdh = EC_KEY_new()) == NULL) { 2678 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2679 ERR_R_MALLOC_FAILURE); 2680 goto err; 2681 } 2682 2683 if (!EC_KEY_set_group(clnt_ecdh, srvr_group)) { 2684 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB); 2685 goto err; 2686 } 2687 if (ecdh_clnt_cert) { 2688 /* 2689 * Reuse key info from our certificate We only need our 2690 * private key to perform the ECDH computation. 2691 */ 2692 const BIGNUM *priv_key; 2693 tkey = s->cert->key->privatekey->pkey.ec; 2694 priv_key = EC_KEY_get0_private_key(tkey); 2695 if (priv_key == NULL) { 2696 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2697 ERR_R_MALLOC_FAILURE); 2698 goto err; 2699 } 2700 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key)) { 2701 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB); 2702 goto err; 2703 } 2704 } else { 2705 /* Generate a new ECDH key pair */ 2706 if (!(EC_KEY_generate_key(clnt_ecdh))) { 2707 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2708 ERR_R_ECDH_LIB); 2709 goto err; 2710 } 2711 } 2712 2713 /* 2714 * use the 'p' output buffer for the ECDH key, but make sure to 2715 * clear it out afterwards 2716 */ 2717 2718 field_size = EC_GROUP_get_degree(srvr_group); 2719 if (field_size <= 0) { 2720 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB); 2721 goto err; 2722 } 2723 n = ECDH_compute_key(p, (field_size + 7) / 8, srvr_ecpoint, 2724 clnt_ecdh, NULL); 2725 if (n <= 0) { 2726 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB); 2727 goto err; 2728 } 2729 2730 /* generate master key from the result */ 2731 s->session->master_key_length = 2732 s->method->ssl3_enc->generate_master_secret(s, 2733 s-> 2734 session->master_key, 2735 p, n); 2736 2737 memset(p, 0, n); /* clean up */ 2738 2739 if (ecdh_clnt_cert) { 2740 /* Send empty client key exch message */ 2741 n = 0; 2742 } else { 2743 /* 2744 * First check the size of encoding and allocate memory 2745 * accordingly. 2746 */ 2747 encoded_pt_len = 2748 EC_POINT_point2oct(srvr_group, 2749 EC_KEY_get0_public_key(clnt_ecdh), 2750 POINT_CONVERSION_UNCOMPRESSED, 2751 NULL, 0, NULL); 2752 2753 encodedPoint = (unsigned char *) 2754 OPENSSL_malloc(encoded_pt_len * sizeof(unsigned char)); 2755 bn_ctx = BN_CTX_new(); 2756 if ((encodedPoint == NULL) || (bn_ctx == NULL)) { 2757 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2758 ERR_R_MALLOC_FAILURE); 2759 goto err; 2760 } 2761 2762 /* Encode the public key */ 2763 n = EC_POINT_point2oct(srvr_group, 2764 EC_KEY_get0_public_key(clnt_ecdh), 2765 POINT_CONVERSION_UNCOMPRESSED, 2766 encodedPoint, encoded_pt_len, bn_ctx); 2767 2768 *p = n; /* length of encoded point */ 2769 /* Encoded point will be copied here */ 2770 p += 1; 2771 /* copy the point */ 2772 memcpy((unsigned char *)p, encodedPoint, n); 2773 /* increment n to account for length field */ 2774 n += 1; 2775 } 2776 2777 /* Free allocated memory */ 2778 BN_CTX_free(bn_ctx); 2779 if (encodedPoint != NULL) 2780 OPENSSL_free(encodedPoint); 2781 if (clnt_ecdh != NULL) 2782 EC_KEY_free(clnt_ecdh); 2783 EVP_PKEY_free(srvr_pub_pkey); 2784 } 2785#endif /* !OPENSSL_NO_ECDH */ 2786 else if (alg_k & SSL_kGOST) { 2787 /* GOST key exchange message creation */ 2788 EVP_PKEY_CTX *pkey_ctx; 2789 X509 *peer_cert; 2790 size_t msglen; 2791 unsigned int md_len; 2792 int keytype; 2793 unsigned char premaster_secret[32], shared_ukm[32], tmp[256]; 2794 EVP_MD_CTX *ukm_hash; 2795 EVP_PKEY *pub_key; 2796 2797 /* 2798 * Get server sertificate PKEY and create ctx from it 2799 */ 2800 peer_cert = 2801 s->session-> 2802 sess_cert->peer_pkeys[(keytype = SSL_PKEY_GOST01)].x509; 2803 if (!peer_cert) 2804 peer_cert = 2805 s->session-> 2806 sess_cert->peer_pkeys[(keytype = SSL_PKEY_GOST94)].x509; 2807 if (!peer_cert) { 2808 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2809 SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER); 2810 goto err; 2811 } 2812 2813 pkey_ctx = EVP_PKEY_CTX_new(pub_key = 2814 X509_get_pubkey(peer_cert), NULL); 2815 /* 2816 * If we have send a certificate, and certificate key 2817 * 2818 * * parameters match those of server certificate, use 2819 * certificate key for key exchange 2820 */ 2821 2822 /* Otherwise, generate ephemeral key pair */ 2823 2824 EVP_PKEY_encrypt_init(pkey_ctx); 2825 /* Generate session key */ 2826 if (RAND_bytes(premaster_secret, 32) <= 0) { 2827 EVP_PKEY_CTX_free(pkey_ctx); 2828 goto err; 2829 } 2830 /* 2831 * If we have client certificate, use its secret as peer key 2832 */ 2833 if (s->s3->tmp.cert_req && s->cert->key->privatekey) { 2834 if (EVP_PKEY_derive_set_peer 2835 (pkey_ctx, s->cert->key->privatekey) <= 0) { 2836 /* 2837 * If there was an error - just ignore it. Ephemeral key 2838 * * would be used 2839 */ 2840 ERR_clear_error(); 2841 } 2842 } 2843 /* 2844 * Compute shared IV and store it in algorithm-specific context 2845 * data 2846 */ 2847 ukm_hash = EVP_MD_CTX_create(); 2848 EVP_DigestInit(ukm_hash, 2849 EVP_get_digestbynid(NID_id_GostR3411_94)); 2850 EVP_DigestUpdate(ukm_hash, s->s3->client_random, 2851 SSL3_RANDOM_SIZE); 2852 EVP_DigestUpdate(ukm_hash, s->s3->server_random, 2853 SSL3_RANDOM_SIZE); 2854 EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len); 2855 EVP_MD_CTX_destroy(ukm_hash); 2856 if (EVP_PKEY_CTX_ctrl 2857 (pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, EVP_PKEY_CTRL_SET_IV, 8, 2858 shared_ukm) < 0) { 2859 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2860 SSL_R_LIBRARY_BUG); 2861 goto err; 2862 } 2863 /* Make GOST keytransport blob message */ 2864 /* 2865 * Encapsulate it into sequence 2866 */ 2867 *(p++) = V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED; 2868 msglen = 255; 2869 if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, premaster_secret, 32) 2870 < 0) { 2871 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2872 SSL_R_LIBRARY_BUG); 2873 goto err; 2874 } 2875 if (msglen >= 0x80) { 2876 *(p++) = 0x81; 2877 *(p++) = msglen & 0xff; 2878 n = msglen + 3; 2879 } else { 2880 *(p++) = msglen & 0xff; 2881 n = msglen + 2; 2882 } 2883 memcpy(p, tmp, msglen); 2884 /* Check if pubkey from client certificate was used */ 2885 if (EVP_PKEY_CTX_ctrl 2886 (pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0) { 2887 /* Set flag "skip certificate verify" */ 2888 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY; 2889 } 2890 EVP_PKEY_CTX_free(pkey_ctx); 2891 s->session->master_key_length = 2892 s->method->ssl3_enc->generate_master_secret(s, 2893 s-> 2894 session->master_key, 2895 premaster_secret, 2896 32); 2897 EVP_PKEY_free(pub_key); 2898 2899 } 2900#ifndef OPENSSL_NO_SRP 2901 else if (alg_k & SSL_kSRP) { 2902 if (s->srp_ctx.A != NULL) { 2903 /* send off the data */ 2904 n = BN_num_bytes(s->srp_ctx.A); 2905 s2n(n, p); 2906 BN_bn2bin(s->srp_ctx.A, p); 2907 n += 2; 2908 } else { 2909 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2910 ERR_R_INTERNAL_ERROR); 2911 goto err; 2912 } 2913 if (s->session->srp_username != NULL) 2914 OPENSSL_free(s->session->srp_username); 2915 s->session->srp_username = BUF_strdup(s->srp_ctx.login); 2916 if (s->session->srp_username == NULL) { 2917 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2918 ERR_R_MALLOC_FAILURE); 2919 goto err; 2920 } 2921 2922 if ((s->session->master_key_length = 2923 SRP_generate_client_master_secret(s, 2924 s->session->master_key)) < 2925 0) { 2926 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2927 ERR_R_INTERNAL_ERROR); 2928 goto err; 2929 } 2930 } 2931#endif 2932#ifndef OPENSSL_NO_PSK 2933 else if (alg_k & SSL_kPSK) { 2934 /* 2935 * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a 2936 * \0-terminated identity. The last byte is for us for simulating 2937 * strnlen. 2938 */ 2939 char identity[PSK_MAX_IDENTITY_LEN + 2]; 2940 size_t identity_len; 2941 unsigned char *t = NULL; 2942 unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN * 2 + 4]; 2943 unsigned int pre_ms_len = 0, psk_len = 0; 2944 int psk_err = 1; 2945 2946 n = 0; 2947 if (s->psk_client_callback == NULL) { 2948 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2949 SSL_R_PSK_NO_CLIENT_CB); 2950 goto err; 2951 } 2952 2953 memset(identity, 0, sizeof(identity)); 2954 psk_len = s->psk_client_callback(s, s->session->psk_identity_hint, 2955 identity, sizeof(identity) - 1, 2956 psk_or_pre_ms, 2957 sizeof(psk_or_pre_ms)); 2958 if (psk_len > PSK_MAX_PSK_LEN) { 2959 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2960 ERR_R_INTERNAL_ERROR); 2961 goto psk_err; 2962 } else if (psk_len == 0) { 2963 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2964 SSL_R_PSK_IDENTITY_NOT_FOUND); 2965 goto psk_err; 2966 } 2967 identity[PSK_MAX_IDENTITY_LEN + 1] = '\0'; 2968 identity_len = strlen(identity); 2969 if (identity_len > PSK_MAX_IDENTITY_LEN) { 2970 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2971 ERR_R_INTERNAL_ERROR); 2972 goto psk_err; 2973 } 2974 /* create PSK pre_master_secret */ 2975 pre_ms_len = 2 + psk_len + 2 + psk_len; 2976 t = psk_or_pre_ms; 2977 memmove(psk_or_pre_ms + psk_len + 4, psk_or_pre_ms, psk_len); 2978 s2n(psk_len, t); 2979 memset(t, 0, psk_len); 2980 t += psk_len; 2981 s2n(psk_len, t); 2982 2983 if (s->session->psk_identity_hint != NULL) 2984 OPENSSL_free(s->session->psk_identity_hint); 2985 s->session->psk_identity_hint = 2986 BUF_strdup(s->ctx->psk_identity_hint); 2987 if (s->ctx->psk_identity_hint != NULL 2988 && s->session->psk_identity_hint == NULL) { 2989 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2990 ERR_R_MALLOC_FAILURE); 2991 goto psk_err; 2992 } 2993 2994 if (s->session->psk_identity != NULL) 2995 OPENSSL_free(s->session->psk_identity); 2996 s->session->psk_identity = BUF_strdup(identity); 2997 if (s->session->psk_identity == NULL) { 2998 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2999 ERR_R_MALLOC_FAILURE); 3000 goto psk_err; 3001 } 3002 3003 s->session->master_key_length = 3004 s->method->ssl3_enc->generate_master_secret(s, 3005 s-> 3006 session->master_key, 3007 psk_or_pre_ms, 3008 pre_ms_len); 3009 s2n(identity_len, p); 3010 memcpy(p, identity, identity_len); 3011 n = 2 + identity_len; 3012 psk_err = 0; 3013 psk_err: 3014 OPENSSL_cleanse(identity, sizeof(identity)); 3015 OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms)); 3016 if (psk_err != 0) { 3017 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); 3018 goto err; 3019 } 3020 } 3021#endif 3022 else { 3023 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); 3024 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); 3025 goto err; 3026 } 3027 3028 *(d++) = SSL3_MT_CLIENT_KEY_EXCHANGE; 3029 l2n3(n, d); 3030 3031 s->state = SSL3_ST_CW_KEY_EXCH_B; 3032 /* number of bytes to write */ 3033 s->init_num = n + 4; 3034 s->init_off = 0; 3035 } 3036 3037 /* SSL3_ST_CW_KEY_EXCH_B */ 3038 return (ssl3_do_write(s, SSL3_RT_HANDSHAKE)); 3039 err: 3040#ifndef OPENSSL_NO_ECDH 3041 BN_CTX_free(bn_ctx); 3042 if (encodedPoint != NULL) 3043 OPENSSL_free(encodedPoint); 3044 if (clnt_ecdh != NULL) 3045 EC_KEY_free(clnt_ecdh); 3046 EVP_PKEY_free(srvr_pub_pkey); 3047#endif 3048 s->state = SSL_ST_ERR; 3049 return (-1); 3050} 3051 3052int ssl3_send_client_verify(SSL *s) 3053{ 3054 unsigned char *p, *d; 3055 unsigned char data[MD5_DIGEST_LENGTH + SHA_DIGEST_LENGTH]; 3056 EVP_PKEY *pkey; 3057 EVP_PKEY_CTX *pctx = NULL; 3058 EVP_MD_CTX mctx; 3059 unsigned u = 0; 3060 unsigned long n; 3061 int j; 3062 3063 EVP_MD_CTX_init(&mctx); 3064 3065 if (s->state == SSL3_ST_CW_CERT_VRFY_A) { 3066 d = (unsigned char *)s->init_buf->data; 3067 p = &(d[4]); 3068 pkey = s->cert->key->privatekey; 3069/* Create context from key and test if sha1 is allowed as digest */ 3070 pctx = EVP_PKEY_CTX_new(pkey, NULL); 3071 EVP_PKEY_sign_init(pctx); 3072 if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1()) > 0) { 3073 if (TLS1_get_version(s) < TLS1_2_VERSION) 3074 s->method->ssl3_enc->cert_verify_mac(s, 3075 NID_sha1, 3076 &(data 3077 [MD5_DIGEST_LENGTH])); 3078 } else { 3079 ERR_clear_error(); 3080 } 3081 /* 3082 * For TLS v1.2 send signature algorithm and signature using agreed 3083 * digest and cached handshake records. 3084 */ 3085 if (TLS1_get_version(s) >= TLS1_2_VERSION) { 3086 long hdatalen = 0; 3087 void *hdata; 3088 const EVP_MD *md = s->cert->key->digest; 3089 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, &hdata); 3090 if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md)) { 3091 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR); 3092 goto err; 3093 } 3094 p += 2; 3095#ifdef SSL_DEBUG 3096 fprintf(stderr, "Using TLS 1.2 with client alg %s\n", 3097 EVP_MD_name(md)); 3098#endif 3099 if (!EVP_SignInit_ex(&mctx, md, NULL) 3100 || !EVP_SignUpdate(&mctx, hdata, hdatalen) 3101 || !EVP_SignFinal(&mctx, p + 2, &u, pkey)) { 3102 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_EVP_LIB); 3103 goto err; 3104 } 3105 s2n(u, p); 3106 n = u + 4; 3107 if (!ssl3_digest_cached_records(s)) 3108 goto err; 3109 } else 3110#ifndef OPENSSL_NO_RSA 3111 if (pkey->type == EVP_PKEY_RSA) { 3112 s->method->ssl3_enc->cert_verify_mac(s, NID_md5, &(data[0])); 3113 if (RSA_sign(NID_md5_sha1, data, 3114 MD5_DIGEST_LENGTH + SHA_DIGEST_LENGTH, 3115 &(p[2]), &u, pkey->pkey.rsa) <= 0) { 3116 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_RSA_LIB); 3117 goto err; 3118 } 3119 s2n(u, p); 3120 n = u + 2; 3121 } else 3122#endif 3123#ifndef OPENSSL_NO_DSA 3124 if (pkey->type == EVP_PKEY_DSA) { 3125 if (!DSA_sign(pkey->save_type, 3126 &(data[MD5_DIGEST_LENGTH]), 3127 SHA_DIGEST_LENGTH, &(p[2]), 3128 (unsigned int *)&j, pkey->pkey.dsa)) { 3129 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_DSA_LIB); 3130 goto err; 3131 } 3132 s2n(j, p); 3133 n = j + 2; 3134 } else 3135#endif 3136#ifndef OPENSSL_NO_ECDSA 3137 if (pkey->type == EVP_PKEY_EC) { 3138 if (!ECDSA_sign(pkey->save_type, 3139 &(data[MD5_DIGEST_LENGTH]), 3140 SHA_DIGEST_LENGTH, &(p[2]), 3141 (unsigned int *)&j, pkey->pkey.ec)) { 3142 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_ECDSA_LIB); 3143 goto err; 3144 } 3145 s2n(j, p); 3146 n = j + 2; 3147 } else 3148#endif 3149 if (pkey->type == NID_id_GostR3410_94 3150 || pkey->type == NID_id_GostR3410_2001) { 3151 unsigned char signbuf[64]; 3152 int i; 3153 size_t sigsize = 64; 3154 s->method->ssl3_enc->cert_verify_mac(s, 3155 NID_id_GostR3411_94, data); 3156 if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) { 3157 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR); 3158 goto err; 3159 } 3160 for (i = 63, j = 0; i >= 0; j++, i--) { 3161 p[2 + j] = signbuf[i]; 3162 } 3163 s2n(j, p); 3164 n = j + 2; 3165 } else { 3166 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR); 3167 goto err; 3168 } 3169 *(d++) = SSL3_MT_CERTIFICATE_VERIFY; 3170 l2n3(n, d); 3171 3172 s->state = SSL3_ST_CW_CERT_VRFY_B; 3173 s->init_num = (int)n + 4; 3174 s->init_off = 0; 3175 } 3176 EVP_MD_CTX_cleanup(&mctx); 3177 EVP_PKEY_CTX_free(pctx); 3178 return (ssl3_do_write(s, SSL3_RT_HANDSHAKE)); 3179 err: 3180 EVP_MD_CTX_cleanup(&mctx); 3181 EVP_PKEY_CTX_free(pctx); 3182 s->state = SSL_ST_ERR; 3183 return (-1); 3184} 3185 3186int ssl3_send_client_certificate(SSL *s) 3187{ 3188 X509 *x509 = NULL; 3189 EVP_PKEY *pkey = NULL; 3190 int i; 3191 unsigned long l; 3192 3193 if (s->state == SSL3_ST_CW_CERT_A) { 3194 if ((s->cert == NULL) || 3195 (s->cert->key->x509 == NULL) || 3196 (s->cert->key->privatekey == NULL)) 3197 s->state = SSL3_ST_CW_CERT_B; 3198 else 3199 s->state = SSL3_ST_CW_CERT_C; 3200 } 3201 3202 /* We need to get a client cert */ 3203 if (s->state == SSL3_ST_CW_CERT_B) { 3204 /* 3205 * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP; 3206 * return(-1); We then get retied later 3207 */ 3208 i = 0; 3209 i = ssl_do_client_cert_cb(s, &x509, &pkey); 3210 if (i < 0) { 3211 s->rwstate = SSL_X509_LOOKUP; 3212 return (-1); 3213 } 3214 s->rwstate = SSL_NOTHING; 3215 if ((i == 1) && (pkey != NULL) && (x509 != NULL)) { 3216 s->state = SSL3_ST_CW_CERT_B; 3217 if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey)) 3218 i = 0; 3219 } else if (i == 1) { 3220 i = 0; 3221 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE, 3222 SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); 3223 } 3224 3225 if (x509 != NULL) 3226 X509_free(x509); 3227 if (pkey != NULL) 3228 EVP_PKEY_free(pkey); 3229 if (i == 0) { 3230 if (s->version == SSL3_VERSION) { 3231 s->s3->tmp.cert_req = 0; 3232 ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE); 3233 return (1); 3234 } else { 3235 s->s3->tmp.cert_req = 2; 3236 } 3237 } 3238 3239 /* Ok, we have a cert */ 3240 s->state = SSL3_ST_CW_CERT_C; 3241 } 3242 3243 if (s->state == SSL3_ST_CW_CERT_C) { 3244 s->state = SSL3_ST_CW_CERT_D; 3245 l = ssl3_output_cert_chain(s, 3246 (s->s3->tmp.cert_req == 3247 2) ? NULL : s->cert->key->x509); 3248 if (!l) { 3249 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR); 3250 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); 3251 s->state = SSL_ST_ERR; 3252 return 0; 3253 } 3254 s->init_num = (int)l; 3255 s->init_off = 0; 3256 } 3257 /* SSL3_ST_CW_CERT_D */ 3258 return (ssl3_do_write(s, SSL3_RT_HANDSHAKE)); 3259} 3260 3261#define has_bits(i,m) (((i)&(m)) == (m)) 3262 3263int ssl3_check_cert_and_algorithm(SSL *s) 3264{ 3265 int i, idx; 3266 long alg_k, alg_a; 3267 EVP_PKEY *pkey = NULL; 3268 int pkey_bits; 3269 SESS_CERT *sc; 3270#ifndef OPENSSL_NO_RSA 3271 RSA *rsa; 3272#endif 3273#ifndef OPENSSL_NO_DH 3274 DH *dh; 3275#endif 3276 int al = SSL_AD_HANDSHAKE_FAILURE; 3277 3278 alg_k = s->s3->tmp.new_cipher->algorithm_mkey; 3279 alg_a = s->s3->tmp.new_cipher->algorithm_auth; 3280 3281 /* we don't have a certificate */ 3282 if ((alg_a & (SSL_aDH | SSL_aNULL | SSL_aKRB5)) || (alg_k & SSL_kPSK)) 3283 return (1); 3284 3285 sc = s->session->sess_cert; 3286 if (sc == NULL) { 3287 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR); 3288 goto err; 3289 } 3290#ifndef OPENSSL_NO_RSA 3291 rsa = s->session->sess_cert->peer_rsa_tmp; 3292#endif 3293#ifndef OPENSSL_NO_DH 3294 dh = s->session->sess_cert->peer_dh_tmp; 3295#endif 3296 3297 /* This is the passed certificate */ 3298 3299 idx = sc->peer_cert_type; 3300#ifndef OPENSSL_NO_ECDH 3301 if (idx == SSL_PKEY_ECC) { 3302 if (ssl_check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509, s) == 0) { 3303 /* check failed */ 3304 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_BAD_ECC_CERT); 3305 goto f_err; 3306 } else { 3307 return 1; 3308 } 3309 } 3310#endif 3311 pkey = X509_get_pubkey(sc->peer_pkeys[idx].x509); 3312 pkey_bits = EVP_PKEY_bits(pkey); 3313 i = X509_certificate_type(sc->peer_pkeys[idx].x509, pkey); 3314 EVP_PKEY_free(pkey); 3315 3316 /* Check that we have a certificate if we require one */ 3317 if ((alg_a & SSL_aRSA) && !has_bits(i, EVP_PK_RSA | EVP_PKT_SIGN)) { 3318 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, 3319 SSL_R_MISSING_RSA_SIGNING_CERT); 3320 goto f_err; 3321 } 3322#ifndef OPENSSL_NO_DSA 3323 else if ((alg_a & SSL_aDSS) && !has_bits(i, EVP_PK_DSA | EVP_PKT_SIGN)) { 3324 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, 3325 SSL_R_MISSING_DSA_SIGNING_CERT); 3326 goto f_err; 3327 } 3328#endif 3329#ifndef OPENSSL_NO_RSA 3330 if (alg_k & SSL_kRSA) { 3331 if (!SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && 3332 !has_bits(i, EVP_PK_RSA | EVP_PKT_ENC)) { 3333 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, 3334 SSL_R_MISSING_RSA_ENCRYPTING_CERT); 3335 goto f_err; 3336 } else if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)) { 3337 if (pkey_bits <= SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) { 3338 if (!has_bits(i, EVP_PK_RSA | EVP_PKT_ENC)) { 3339 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, 3340 SSL_R_MISSING_RSA_ENCRYPTING_CERT); 3341 goto f_err; 3342 } 3343 if (rsa != NULL) { 3344 /* server key exchange is not allowed. */ 3345 al = SSL_AD_INTERNAL_ERROR; 3346 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR); 3347 goto f_err; 3348 } 3349 } 3350 } 3351 } 3352#endif 3353#ifndef OPENSSL_NO_DH 3354 if ((alg_k & SSL_kEDH) && dh == NULL) { 3355 al = SSL_AD_INTERNAL_ERROR; 3356 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR); 3357 goto f_err; 3358 } 3359 if ((alg_k & SSL_kDHr) && !has_bits(i, EVP_PK_DH | EVP_PKS_RSA)) { 3360 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, 3361 SSL_R_MISSING_DH_RSA_CERT); 3362 goto f_err; 3363 } 3364# ifndef OPENSSL_NO_DSA 3365 if ((alg_k & SSL_kDHd) && !has_bits(i, EVP_PK_DH | EVP_PKS_DSA)) { 3366 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, 3367 SSL_R_MISSING_DH_DSA_CERT); 3368 goto f_err; 3369 } 3370# endif 3371 3372 /* Check DHE only: static DH not implemented. */ 3373 if (alg_k & SSL_kEDH) { 3374 int dh_size = BN_num_bits(dh->p); 3375 if ((!SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && dh_size < 768) 3376 || (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && dh_size < 512)) { 3377 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_DH_KEY_TOO_SMALL); 3378 goto f_err; 3379 } 3380 } 3381#endif /* !OPENSSL_NO_DH */ 3382 3383 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && 3384 pkey_bits > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) { 3385#ifndef OPENSSL_NO_RSA 3386 if (alg_k & SSL_kRSA) { 3387 if (rsa == NULL) { 3388 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, 3389 SSL_R_MISSING_EXPORT_TMP_RSA_KEY); 3390 goto f_err; 3391 } else if (BN_num_bits(rsa->n) > 3392 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) { 3393 /* We have a temporary RSA key but it's too large. */ 3394 al = SSL_AD_EXPORT_RESTRICTION; 3395 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, 3396 SSL_R_MISSING_EXPORT_TMP_RSA_KEY); 3397 goto f_err; 3398 } 3399 } else 3400#endif 3401#ifndef OPENSSL_NO_DH 3402 if (alg_k & SSL_kEDH) { 3403 if (BN_num_bits(dh->p) > 3404 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) { 3405 /* We have a temporary DH key but it's too large. */ 3406 al = SSL_AD_EXPORT_RESTRICTION; 3407 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, 3408 SSL_R_MISSING_EXPORT_TMP_DH_KEY); 3409 goto f_err; 3410 } 3411 } else if (alg_k & (SSL_kDHr | SSL_kDHd)) { 3412 /* The cert should have had an export DH key. */ 3413 al = SSL_AD_EXPORT_RESTRICTION; 3414 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, 3415 SSL_R_MISSING_EXPORT_TMP_DH_KEY); 3416 goto f_err; 3417 } else 3418#endif 3419 { 3420 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, 3421 SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE); 3422 goto f_err; 3423 } 3424 } 3425 return (1); 3426 f_err: 3427 ssl3_send_alert(s, SSL3_AL_FATAL, al); 3428 err: 3429 return (0); 3430} 3431 3432#ifndef OPENSSL_NO_TLSEXT 3433/* 3434 * Normally, we can tell if the server is resuming the session from 3435 * the session ID. EAP-FAST (RFC 4851), however, relies on the next server 3436 * message after the ServerHello to determine if the server is resuming. 3437 * Therefore, we allow EAP-FAST to peek ahead. 3438 * ssl3_check_finished returns 1 if we are resuming from an external 3439 * pre-shared secret, we have a "ticket" and the next server handshake message 3440 * is Finished; and 0 otherwise. It returns -1 upon an error. 3441 */ 3442static int ssl3_check_finished(SSL *s) 3443{ 3444 int ok = 0; 3445 3446 if (s->version < TLS1_VERSION || !s->tls_session_secret_cb || 3447 !s->session->tlsext_tick) 3448 return 0; 3449 3450 /* Need to permit this temporarily, in case the next message is Finished. */ 3451 s->s3->flags |= SSL3_FLAGS_CCS_OK; 3452 /* 3453 * This function is called when we might get a Certificate message instead, 3454 * so permit appropriate message length. 3455 * We ignore the return value as we're only interested in the message type 3456 * and not its length. 3457 */ 3458 s->method->ssl_get_message(s, 3459 SSL3_ST_CR_CERT_A, 3460 SSL3_ST_CR_CERT_B, 3461 -1, s->max_cert_list, &ok); 3462 s->s3->flags &= ~SSL3_FLAGS_CCS_OK; 3463 3464 if (!ok) 3465 return -1; 3466 3467 s->s3->tmp.reuse_message = 1; 3468 3469 if (s->s3->tmp.message_type == SSL3_MT_FINISHED) 3470 return 1; 3471 3472 /* If we're not done, then the CCS arrived early and we should bail. */ 3473 if (s->s3->change_cipher_spec) { 3474 SSLerr(SSL_F_SSL3_CHECK_FINISHED, SSL_R_CCS_RECEIVED_EARLY); 3475 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE); 3476 return -1; 3477 } 3478 3479 return 0; 3480} 3481 3482# ifndef OPENSSL_NO_NEXTPROTONEG 3483int ssl3_send_next_proto(SSL *s) 3484{ 3485 unsigned int len, padding_len; 3486 unsigned char *d; 3487 3488 if (s->state == SSL3_ST_CW_NEXT_PROTO_A) { 3489 len = s->next_proto_negotiated_len; 3490 padding_len = 32 - ((len + 2) % 32); 3491 d = (unsigned char *)s->init_buf->data; 3492 d[4] = len; 3493 memcpy(d + 5, s->next_proto_negotiated, len); 3494 d[5 + len] = padding_len; 3495 memset(d + 6 + len, 0, padding_len); 3496 *(d++) = SSL3_MT_NEXT_PROTO; 3497 l2n3(2 + len + padding_len, d); 3498 s->state = SSL3_ST_CW_NEXT_PROTO_B; 3499 s->init_num = 4 + 2 + len + padding_len; 3500 s->init_off = 0; 3501 } 3502 3503 return ssl3_do_write(s, SSL3_RT_HANDSHAKE); 3504} 3505#endif /* !OPENSSL_NO_NEXTPROTONEG */ 3506#endif /* !OPENSSL_NO_TLSEXT */ 3507 3508int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey) 3509{ 3510 int i = 0; 3511#ifndef OPENSSL_NO_ENGINE 3512 if (s->ctx->client_cert_engine) { 3513 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s, 3514 SSL_get_client_CA_list(s), 3515 px509, ppkey, NULL, NULL, NULL); 3516 if (i != 0) 3517 return i; 3518 } 3519#endif 3520 if (s->ctx->client_cert_cb) 3521 i = s->ctx->client_cert_cb(s, px509, ppkey); 3522 return i; 3523} 3524