s3_clnt.c revision 296341
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 n2l3(p, l); 1147 if ((l + nc + 3) > llen) { 1148 al = SSL_AD_DECODE_ERROR; 1149 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 1150 SSL_R_CERT_LENGTH_MISMATCH); 1151 goto f_err; 1152 } 1153 1154 q = p; 1155 x = d2i_X509(NULL, &q, l); 1156 if (x == NULL) { 1157 al = SSL_AD_BAD_CERTIFICATE; 1158 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, ERR_R_ASN1_LIB); 1159 goto f_err; 1160 } 1161 if (q != (p + l)) { 1162 al = SSL_AD_DECODE_ERROR; 1163 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 1164 SSL_R_CERT_LENGTH_MISMATCH); 1165 goto f_err; 1166 } 1167 if (!sk_X509_push(sk, x)) { 1168 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); 1169 goto err; 1170 } 1171 x = NULL; 1172 nc += l + 3; 1173 p = q; 1174 } 1175 1176 i = ssl_verify_cert_chain(s, sk); 1177 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0) 1178#ifndef OPENSSL_NO_KRB5 1179 && !((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) && 1180 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5)) 1181#endif /* OPENSSL_NO_KRB5 */ 1182 ) { 1183 al = ssl_verify_alarm_type(s->verify_result); 1184 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 1185 SSL_R_CERTIFICATE_VERIFY_FAILED); 1186 goto f_err; 1187 } 1188 ERR_clear_error(); /* but we keep s->verify_result */ 1189 1190 sc = ssl_sess_cert_new(); 1191 if (sc == NULL) 1192 goto err; 1193 1194 if (s->session->sess_cert) 1195 ssl_sess_cert_free(s->session->sess_cert); 1196 s->session->sess_cert = sc; 1197 1198 sc->cert_chain = sk; 1199 /* 1200 * Inconsistency alert: cert_chain does include the peer's certificate, 1201 * which we don't include in s3_srvr.c 1202 */ 1203 x = sk_X509_value(sk, 0); 1204 sk = NULL; 1205 /* 1206 * VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end 1207 */ 1208 1209 pkey = X509_get_pubkey(x); 1210 1211 /* VRS: allow null cert if auth == KRB5 */ 1212 need_cert = ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) && 1213 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5)) 1214 ? 0 : 1; 1215 1216#ifdef KSSL_DEBUG 1217 fprintf(stderr, "pkey,x = %p, %p\n", pkey, x); 1218 fprintf(stderr, "ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x, pkey)); 1219 fprintf(stderr, "cipher, alg, nc = %s, %lx, %lx, %d\n", 1220 s->s3->tmp.new_cipher->name, 1221 s->s3->tmp.new_cipher->algorithm_mkey, 1222 s->s3->tmp.new_cipher->algorithm_auth, need_cert); 1223#endif /* KSSL_DEBUG */ 1224 1225 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey))) { 1226 x = NULL; 1227 al = SSL3_AL_FATAL; 1228 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 1229 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); 1230 goto f_err; 1231 } 1232 1233 i = ssl_cert_type(x, pkey); 1234 if (need_cert && i < 0) { 1235 x = NULL; 1236 al = SSL3_AL_FATAL; 1237 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 1238 SSL_R_UNKNOWN_CERTIFICATE_TYPE); 1239 goto f_err; 1240 } 1241 1242 if (need_cert) { 1243 sc->peer_cert_type = i; 1244 CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509); 1245 /* 1246 * Why would the following ever happen? We just created sc a couple 1247 * of lines ago. 1248 */ 1249 if (sc->peer_pkeys[i].x509 != NULL) 1250 X509_free(sc->peer_pkeys[i].x509); 1251 sc->peer_pkeys[i].x509 = x; 1252 sc->peer_key = &(sc->peer_pkeys[i]); 1253 1254 if (s->session->peer != NULL) 1255 X509_free(s->session->peer); 1256 CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509); 1257 s->session->peer = x; 1258 } else { 1259 sc->peer_cert_type = i; 1260 sc->peer_key = NULL; 1261 1262 if (s->session->peer != NULL) 1263 X509_free(s->session->peer); 1264 s->session->peer = NULL; 1265 } 1266 s->session->verify_result = s->verify_result; 1267 1268 x = NULL; 1269 ret = 1; 1270 1271 if (0) { 1272 f_err: 1273 ssl3_send_alert(s, SSL3_AL_FATAL, al); 1274 err: 1275 s->state = SSL_ST_ERR; 1276 } 1277 1278 EVP_PKEY_free(pkey); 1279 X509_free(x); 1280 sk_X509_pop_free(sk, X509_free); 1281 return (ret); 1282} 1283 1284int ssl3_get_key_exchange(SSL *s) 1285{ 1286#ifndef OPENSSL_NO_RSA 1287 unsigned char *q, md_buf[EVP_MAX_MD_SIZE * 2]; 1288#endif 1289 EVP_MD_CTX md_ctx; 1290 unsigned char *param, *p; 1291 int al, j, ok; 1292 long i, param_len, n, alg_k, alg_a; 1293 EVP_PKEY *pkey = NULL; 1294 const EVP_MD *md = NULL; 1295#ifndef OPENSSL_NO_RSA 1296 RSA *rsa = NULL; 1297#endif 1298#ifndef OPENSSL_NO_DH 1299 DH *dh = NULL; 1300#endif 1301#ifndef OPENSSL_NO_ECDH 1302 EC_KEY *ecdh = NULL; 1303 BN_CTX *bn_ctx = NULL; 1304 EC_POINT *srvr_ecpoint = NULL; 1305 int curve_nid = 0; 1306 int encoded_pt_len = 0; 1307#endif 1308 1309 EVP_MD_CTX_init(&md_ctx); 1310 1311 /* 1312 * use same message size as in ssl3_get_certificate_request() as 1313 * ServerKeyExchange message may be skipped 1314 */ 1315 n = s->method->ssl_get_message(s, 1316 SSL3_ST_CR_KEY_EXCH_A, 1317 SSL3_ST_CR_KEY_EXCH_B, 1318 -1, s->max_cert_list, &ok); 1319 if (!ok) 1320 return ((int)n); 1321 1322 alg_k = s->s3->tmp.new_cipher->algorithm_mkey; 1323 1324 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE) { 1325 /* 1326 * Can't skip server key exchange if this is an ephemeral 1327 * ciphersuite. 1328 */ 1329 if (alg_k & (SSL_kEDH | SSL_kEECDH)) { 1330 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); 1331 al = SSL_AD_UNEXPECTED_MESSAGE; 1332 goto f_err; 1333 } 1334#ifndef OPENSSL_NO_PSK 1335 /* 1336 * In plain PSK ciphersuite, ServerKeyExchange can be omitted if no 1337 * identity hint is sent. Set session->sess_cert anyway to avoid 1338 * problems later. 1339 */ 1340 if (alg_k & SSL_kPSK) { 1341 s->session->sess_cert = ssl_sess_cert_new(); 1342 if (s->ctx->psk_identity_hint) 1343 OPENSSL_free(s->ctx->psk_identity_hint); 1344 s->ctx->psk_identity_hint = NULL; 1345 } 1346#endif 1347 s->s3->tmp.reuse_message = 1; 1348 return (1); 1349 } 1350 1351 param = p = (unsigned char *)s->init_msg; 1352 if (s->session->sess_cert != NULL) { 1353#ifndef OPENSSL_NO_RSA 1354 if (s->session->sess_cert->peer_rsa_tmp != NULL) { 1355 RSA_free(s->session->sess_cert->peer_rsa_tmp); 1356 s->session->sess_cert->peer_rsa_tmp = NULL; 1357 } 1358#endif 1359#ifndef OPENSSL_NO_DH 1360 if (s->session->sess_cert->peer_dh_tmp) { 1361 DH_free(s->session->sess_cert->peer_dh_tmp); 1362 s->session->sess_cert->peer_dh_tmp = NULL; 1363 } 1364#endif 1365#ifndef OPENSSL_NO_ECDH 1366 if (s->session->sess_cert->peer_ecdh_tmp) { 1367 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp); 1368 s->session->sess_cert->peer_ecdh_tmp = NULL; 1369 } 1370#endif 1371 } else { 1372 s->session->sess_cert = ssl_sess_cert_new(); 1373 } 1374 1375 /* Total length of the parameters including the length prefix */ 1376 param_len = 0; 1377 1378 alg_a = s->s3->tmp.new_cipher->algorithm_auth; 1379 1380 al = SSL_AD_DECODE_ERROR; 1381 1382#ifndef OPENSSL_NO_PSK 1383 if (alg_k & SSL_kPSK) { 1384 param_len = 2; 1385 if (param_len > n) { 1386 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); 1387 goto f_err; 1388 } 1389 n2s(p, i); 1390 1391 /* 1392 * Store PSK identity hint for later use, hint is used in 1393 * ssl3_send_client_key_exchange. Assume that the maximum length of 1394 * a PSK identity hint can be as long as the maximum length of a PSK 1395 * identity. 1396 */ 1397 if (i > PSK_MAX_IDENTITY_LEN) { 1398 al = SSL_AD_HANDSHAKE_FAILURE; 1399 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_DATA_LENGTH_TOO_LONG); 1400 goto f_err; 1401 } 1402 if (i > n - param_len) { 1403 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1404 SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH); 1405 goto f_err; 1406 } 1407 param_len += i; 1408 1409 s->session->psk_identity_hint = BUF_strndup((char *)p, i); 1410 if (s->session->psk_identity_hint == NULL) { 1411 al = SSL_AD_HANDSHAKE_FAILURE; 1412 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); 1413 goto f_err; 1414 } 1415 1416 p += i; 1417 n -= param_len; 1418 } else 1419#endif /* !OPENSSL_NO_PSK */ 1420#ifndef OPENSSL_NO_SRP 1421 if (alg_k & SSL_kSRP) { 1422 param_len = 2; 1423 if (param_len > n) { 1424 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); 1425 goto f_err; 1426 } 1427 n2s(p, i); 1428 1429 if (i > n - param_len) { 1430 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SRP_N_LENGTH); 1431 goto f_err; 1432 } 1433 param_len += i; 1434 1435 if (!(s->srp_ctx.N = BN_bin2bn(p, i, NULL))) { 1436 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); 1437 goto err; 1438 } 1439 p += i; 1440 1441 if (2 > n - param_len) { 1442 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); 1443 goto f_err; 1444 } 1445 param_len += 2; 1446 1447 n2s(p, i); 1448 1449 if (i > n - param_len) { 1450 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SRP_G_LENGTH); 1451 goto f_err; 1452 } 1453 param_len += i; 1454 1455 if (!(s->srp_ctx.g = BN_bin2bn(p, i, NULL))) { 1456 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); 1457 goto err; 1458 } 1459 p += i; 1460 1461 if (1 > n - param_len) { 1462 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); 1463 goto f_err; 1464 } 1465 param_len += 1; 1466 1467 i = (unsigned int)(p[0]); 1468 p++; 1469 1470 if (i > n - param_len) { 1471 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SRP_S_LENGTH); 1472 goto f_err; 1473 } 1474 param_len += i; 1475 1476 if (!(s->srp_ctx.s = BN_bin2bn(p, i, NULL))) { 1477 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); 1478 goto err; 1479 } 1480 p += i; 1481 1482 if (2 > n - param_len) { 1483 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); 1484 goto f_err; 1485 } 1486 param_len += 2; 1487 1488 n2s(p, i); 1489 1490 if (i > n - param_len) { 1491 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SRP_B_LENGTH); 1492 goto f_err; 1493 } 1494 param_len += i; 1495 1496 if (!(s->srp_ctx.B = BN_bin2bn(p, i, NULL))) { 1497 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); 1498 goto err; 1499 } 1500 p += i; 1501 n -= param_len; 1502 1503 if (!srp_verify_server_param(s, &al)) { 1504 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SRP_PARAMETERS); 1505 goto f_err; 1506 } 1507 1508/* We must check if there is a certificate */ 1509# ifndef OPENSSL_NO_RSA 1510 if (alg_a & SSL_aRSA) 1511 pkey = 1512 X509_get_pubkey(s->session-> 1513 sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1514# else 1515 if (0) ; 1516# endif 1517# ifndef OPENSSL_NO_DSA 1518 else if (alg_a & SSL_aDSS) 1519 pkey = 1520 X509_get_pubkey(s->session-> 1521 sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN]. 1522 x509); 1523# endif 1524 } else 1525#endif /* !OPENSSL_NO_SRP */ 1526#ifndef OPENSSL_NO_RSA 1527 if (alg_k & SSL_kRSA) { 1528 /* Temporary RSA keys only allowed in export ciphersuites */ 1529 if (!SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)) { 1530 al = SSL_AD_UNEXPECTED_MESSAGE; 1531 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); 1532 goto f_err; 1533 } 1534 if ((rsa = RSA_new()) == NULL) { 1535 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); 1536 goto err; 1537 } 1538 1539 param_len = 2; 1540 if (param_len > n) { 1541 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); 1542 goto f_err; 1543 } 1544 n2s(p, i); 1545 1546 if (i > n - param_len) { 1547 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_RSA_MODULUS_LENGTH); 1548 goto f_err; 1549 } 1550 param_len += i; 1551 1552 if (!(rsa->n = BN_bin2bn(p, i, rsa->n))) { 1553 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); 1554 goto err; 1555 } 1556 p += i; 1557 1558 if (2 > n - param_len) { 1559 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); 1560 goto f_err; 1561 } 1562 param_len += 2; 1563 1564 n2s(p, i); 1565 1566 if (i > n - param_len) { 1567 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_RSA_E_LENGTH); 1568 goto f_err; 1569 } 1570 param_len += i; 1571 1572 if (!(rsa->e = BN_bin2bn(p, i, rsa->e))) { 1573 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); 1574 goto err; 1575 } 1576 p += i; 1577 n -= param_len; 1578 1579 /* this should be because we are using an export cipher */ 1580 if (alg_a & SSL_aRSA) 1581 pkey = 1582 X509_get_pubkey(s->session-> 1583 sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1584 else { 1585 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); 1586 goto err; 1587 } 1588 1589 if (EVP_PKEY_bits(pkey) <= SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) { 1590 al = SSL_AD_UNEXPECTED_MESSAGE; 1591 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); 1592 goto f_err; 1593 } 1594 1595 s->session->sess_cert->peer_rsa_tmp = rsa; 1596 rsa = NULL; 1597 } 1598#else /* OPENSSL_NO_RSA */ 1599 if (0) ; 1600#endif 1601#ifndef OPENSSL_NO_DH 1602 else if (alg_k & SSL_kEDH) { 1603 if ((dh = DH_new()) == NULL) { 1604 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_DH_LIB); 1605 goto err; 1606 } 1607 1608 param_len = 2; 1609 if (param_len > n) { 1610 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); 1611 goto f_err; 1612 } 1613 n2s(p, i); 1614 1615 if (i > n - param_len) { 1616 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_DH_P_LENGTH); 1617 goto f_err; 1618 } 1619 param_len += i; 1620 1621 if (!(dh->p = BN_bin2bn(p, i, NULL))) { 1622 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); 1623 goto err; 1624 } 1625 p += i; 1626 1627 if (2 > n - param_len) { 1628 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); 1629 goto f_err; 1630 } 1631 param_len += 2; 1632 1633 n2s(p, i); 1634 1635 if (i > n - param_len) { 1636 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_DH_G_LENGTH); 1637 goto f_err; 1638 } 1639 param_len += i; 1640 1641 if (!(dh->g = BN_bin2bn(p, i, NULL))) { 1642 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); 1643 goto err; 1644 } 1645 p += i; 1646 1647 if (2 > n - param_len) { 1648 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); 1649 goto f_err; 1650 } 1651 param_len += 2; 1652 1653 n2s(p, i); 1654 1655 if (i > n - param_len) { 1656 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_DH_PUB_KEY_LENGTH); 1657 goto f_err; 1658 } 1659 param_len += i; 1660 1661 if (!(dh->pub_key = BN_bin2bn(p, i, NULL))) { 1662 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); 1663 goto err; 1664 } 1665 p += i; 1666 n -= param_len; 1667 1668# ifndef OPENSSL_NO_RSA 1669 if (alg_a & SSL_aRSA) 1670 pkey = 1671 X509_get_pubkey(s->session-> 1672 sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1673# else 1674 if (0) ; 1675# endif 1676# ifndef OPENSSL_NO_DSA 1677 else if (alg_a & SSL_aDSS) 1678 pkey = 1679 X509_get_pubkey(s->session-> 1680 sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN]. 1681 x509); 1682# endif 1683 /* else anonymous DH, so no certificate or pkey. */ 1684 1685 s->session->sess_cert->peer_dh_tmp = dh; 1686 dh = NULL; 1687 } else if ((alg_k & SSL_kDHr) || (alg_k & SSL_kDHd)) { 1688 al = SSL_AD_ILLEGAL_PARAMETER; 1689 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1690 SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER); 1691 goto f_err; 1692 } 1693#endif /* !OPENSSL_NO_DH */ 1694 1695#ifndef OPENSSL_NO_ECDH 1696 else if (alg_k & SSL_kEECDH) { 1697 EC_GROUP *ngroup; 1698 const EC_GROUP *group; 1699 1700 if ((ecdh = EC_KEY_new()) == NULL) { 1701 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); 1702 goto err; 1703 } 1704 1705 /* 1706 * Extract elliptic curve parameters and the server's ephemeral ECDH 1707 * public key. Keep accumulating lengths of various components in 1708 * param_len and make sure it never exceeds n. 1709 */ 1710 1711 /* 1712 * XXX: For now we only support named (not generic) curves and the 1713 * ECParameters in this case is just three bytes. We also need one 1714 * byte for the length of the encoded point 1715 */ 1716 param_len = 4; 1717 if (param_len > n) { 1718 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); 1719 goto f_err; 1720 } 1721 1722 if ((*p != NAMED_CURVE_TYPE) || 1723 ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0)) { 1724 al = SSL_AD_INTERNAL_ERROR; 1725 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1726 SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); 1727 goto f_err; 1728 } 1729 1730 ngroup = EC_GROUP_new_by_curve_name(curve_nid); 1731 if (ngroup == NULL) { 1732 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_EC_LIB); 1733 goto err; 1734 } 1735 if (EC_KEY_set_group(ecdh, ngroup) == 0) { 1736 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_EC_LIB); 1737 goto err; 1738 } 1739 EC_GROUP_free(ngroup); 1740 1741 group = EC_KEY_get0_group(ecdh); 1742 1743 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && 1744 (EC_GROUP_get_degree(group) > 163)) { 1745 al = SSL_AD_EXPORT_RESTRICTION; 1746 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1747 SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER); 1748 goto f_err; 1749 } 1750 1751 p += 3; 1752 1753 /* Next, get the encoded ECPoint */ 1754 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) || 1755 ((bn_ctx = BN_CTX_new()) == NULL)) { 1756 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); 1757 goto err; 1758 } 1759 1760 encoded_pt_len = *p; /* length of encoded point */ 1761 p += 1; 1762 1763 if ((encoded_pt_len > n - param_len) || 1764 (EC_POINT_oct2point(group, srvr_ecpoint, 1765 p, encoded_pt_len, bn_ctx) == 0)) { 1766 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_ECPOINT); 1767 goto f_err; 1768 } 1769 param_len += encoded_pt_len; 1770 1771 n -= param_len; 1772 p += encoded_pt_len; 1773 1774 /* 1775 * The ECC/TLS specification does not mention the use of DSA to sign 1776 * ECParameters in the server key exchange message. We do support RSA 1777 * and ECDSA. 1778 */ 1779 if (0) ; 1780# ifndef OPENSSL_NO_RSA 1781 else if (alg_a & SSL_aRSA) 1782 pkey = 1783 X509_get_pubkey(s->session-> 1784 sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1785# endif 1786# ifndef OPENSSL_NO_ECDSA 1787 else if (alg_a & SSL_aECDSA) 1788 pkey = 1789 X509_get_pubkey(s->session-> 1790 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509); 1791# endif 1792 /* else anonymous ECDH, so no certificate or pkey. */ 1793 EC_KEY_set_public_key(ecdh, srvr_ecpoint); 1794 s->session->sess_cert->peer_ecdh_tmp = ecdh; 1795 ecdh = NULL; 1796 BN_CTX_free(bn_ctx); 1797 bn_ctx = NULL; 1798 EC_POINT_free(srvr_ecpoint); 1799 srvr_ecpoint = NULL; 1800 } else if (alg_k) { 1801 al = SSL_AD_UNEXPECTED_MESSAGE; 1802 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); 1803 goto f_err; 1804 } 1805#endif /* !OPENSSL_NO_ECDH */ 1806 1807 /* p points to the next byte, there are 'n' bytes left */ 1808 1809 /* if it was signed, check the signature */ 1810 if (pkey != NULL) { 1811 if (TLS1_get_version(s) >= TLS1_2_VERSION) { 1812 int sigalg; 1813 if (2 > n) { 1814 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); 1815 goto f_err; 1816 } 1817 1818 sigalg = tls12_get_sigid(pkey); 1819 /* Should never happen */ 1820 if (sigalg == -1) { 1821 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); 1822 goto err; 1823 } 1824 /* Check key type is consistent with signature */ 1825 if (sigalg != (int)p[1]) { 1826 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1827 SSL_R_WRONG_SIGNATURE_TYPE); 1828 al = SSL_AD_DECODE_ERROR; 1829 goto f_err; 1830 } 1831 md = tls12_get_hash(p[0]); 1832 if (md == NULL) { 1833 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNKNOWN_DIGEST); 1834 goto f_err; 1835 } 1836#ifdef SSL_DEBUG 1837 fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md)); 1838#endif 1839 p += 2; 1840 n -= 2; 1841 } else 1842 md = EVP_sha1(); 1843 1844 if (2 > n) { 1845 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); 1846 goto f_err; 1847 } 1848 n2s(p, i); 1849 n -= 2; 1850 j = EVP_PKEY_size(pkey); 1851 1852 /* 1853 * Check signature length. If n is 0 then signature is empty 1854 */ 1855 if ((i != n) || (n > j) || (n <= 0)) { 1856 /* wrong packet length */ 1857 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_WRONG_SIGNATURE_LENGTH); 1858 goto f_err; 1859 } 1860#ifndef OPENSSL_NO_RSA 1861 if (pkey->type == EVP_PKEY_RSA 1862 && TLS1_get_version(s) < TLS1_2_VERSION) { 1863 int num; 1864 unsigned int size; 1865 1866 j = 0; 1867 q = md_buf; 1868 for (num = 2; num > 0; num--) { 1869 EVP_MD_CTX_set_flags(&md_ctx, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW); 1870 EVP_DigestInit_ex(&md_ctx, (num == 2) 1871 ? s->ctx->md5 : s->ctx->sha1, NULL); 1872 EVP_DigestUpdate(&md_ctx, &(s->s3->client_random[0]), 1873 SSL3_RANDOM_SIZE); 1874 EVP_DigestUpdate(&md_ctx, &(s->s3->server_random[0]), 1875 SSL3_RANDOM_SIZE); 1876 EVP_DigestUpdate(&md_ctx, param, param_len); 1877 EVP_DigestFinal_ex(&md_ctx, q, &size); 1878 q += size; 1879 j += size; 1880 } 1881 i = RSA_verify(NID_md5_sha1, md_buf, j, p, n, pkey->pkey.rsa); 1882 if (i < 0) { 1883 al = SSL_AD_DECRYPT_ERROR; 1884 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_RSA_DECRYPT); 1885 goto f_err; 1886 } 1887 if (i == 0) { 1888 /* bad signature */ 1889 al = SSL_AD_DECRYPT_ERROR; 1890 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE); 1891 goto f_err; 1892 } 1893 } else 1894#endif 1895 { 1896 EVP_VerifyInit_ex(&md_ctx, md, NULL); 1897 EVP_VerifyUpdate(&md_ctx, &(s->s3->client_random[0]), 1898 SSL3_RANDOM_SIZE); 1899 EVP_VerifyUpdate(&md_ctx, &(s->s3->server_random[0]), 1900 SSL3_RANDOM_SIZE); 1901 EVP_VerifyUpdate(&md_ctx, param, param_len); 1902 if (EVP_VerifyFinal(&md_ctx, p, (int)n, pkey) <= 0) { 1903 /* bad signature */ 1904 al = SSL_AD_DECRYPT_ERROR; 1905 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE); 1906 goto f_err; 1907 } 1908 } 1909 } else { 1910 /* aNULL, aSRP or kPSK do not need public keys */ 1911 if (!(alg_a & (SSL_aNULL | SSL_aSRP)) && !(alg_k & SSL_kPSK)) { 1912 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); 1913 goto err; 1914 } 1915 /* still data left over */ 1916 if (n != 0) { 1917 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_EXTRA_DATA_IN_MESSAGE); 1918 goto f_err; 1919 } 1920 } 1921 EVP_PKEY_free(pkey); 1922 EVP_MD_CTX_cleanup(&md_ctx); 1923 return (1); 1924 f_err: 1925 ssl3_send_alert(s, SSL3_AL_FATAL, al); 1926 err: 1927 EVP_PKEY_free(pkey); 1928#ifndef OPENSSL_NO_RSA 1929 if (rsa != NULL) 1930 RSA_free(rsa); 1931#endif 1932#ifndef OPENSSL_NO_DH 1933 if (dh != NULL) 1934 DH_free(dh); 1935#endif 1936#ifndef OPENSSL_NO_ECDH 1937 BN_CTX_free(bn_ctx); 1938 EC_POINT_free(srvr_ecpoint); 1939 if (ecdh != NULL) 1940 EC_KEY_free(ecdh); 1941#endif 1942 EVP_MD_CTX_cleanup(&md_ctx); 1943 s->state = SSL_ST_ERR; 1944 return (-1); 1945} 1946 1947int ssl3_get_certificate_request(SSL *s) 1948{ 1949 int ok, ret = 0; 1950 unsigned long n, nc, l; 1951 unsigned int llen, ctype_num, i; 1952 X509_NAME *xn = NULL; 1953 const unsigned char *p, *q; 1954 unsigned char *d; 1955 STACK_OF(X509_NAME) *ca_sk = NULL; 1956 1957 n = s->method->ssl_get_message(s, 1958 SSL3_ST_CR_CERT_REQ_A, 1959 SSL3_ST_CR_CERT_REQ_B, 1960 -1, s->max_cert_list, &ok); 1961 1962 if (!ok) 1963 return ((int)n); 1964 1965 s->s3->tmp.cert_req = 0; 1966 1967 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE) { 1968 s->s3->tmp.reuse_message = 1; 1969 /* 1970 * If we get here we don't need any cached handshake records as we 1971 * wont be doing client auth. 1972 */ 1973 if (s->s3->handshake_buffer) { 1974 if (!ssl3_digest_cached_records(s)) 1975 goto err; 1976 } 1977 return (1); 1978 } 1979 1980 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST) { 1981 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE); 1982 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, SSL_R_WRONG_MESSAGE_TYPE); 1983 goto err; 1984 } 1985 1986 /* TLS does not like anon-DH with client cert */ 1987 if (s->version > SSL3_VERSION) { 1988 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) { 1989 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE); 1990 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, 1991 SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER); 1992 goto err; 1993 } 1994 } 1995 1996 p = d = (unsigned char *)s->init_msg; 1997 1998 if ((ca_sk = sk_X509_NAME_new(ca_dn_cmp)) == NULL) { 1999 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); 2000 goto err; 2001 } 2002 2003 /* get the certificate types */ 2004 ctype_num = *(p++); 2005 if (ctype_num > SSL3_CT_NUMBER) 2006 ctype_num = SSL3_CT_NUMBER; 2007 for (i = 0; i < ctype_num; i++) 2008 s->s3->tmp.ctype[i] = p[i]; 2009 p += ctype_num; 2010 if (TLS1_get_version(s) >= TLS1_2_VERSION) { 2011 n2s(p, llen); 2012 /* 2013 * Check we have enough room for signature algorithms and following 2014 * length value. 2015 */ 2016 if ((unsigned long)(p - d + llen + 2) > n) { 2017 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); 2018 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, 2019 SSL_R_DATA_LENGTH_TOO_LONG); 2020 goto err; 2021 } 2022 if ((llen & 1) || !tls1_process_sigalgs(s, p, llen)) { 2023 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); 2024 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, 2025 SSL_R_SIGNATURE_ALGORITHMS_ERROR); 2026 goto err; 2027 } 2028 p += llen; 2029 } 2030 2031 /* get the CA RDNs */ 2032 n2s(p, llen); 2033#if 0 2034 { 2035 FILE *out; 2036 out = fopen("/tmp/vsign.der", "w"); 2037 fwrite(p, 1, llen, out); 2038 fclose(out); 2039 } 2040#endif 2041 2042 if ((unsigned long)(p - d + llen) != n) { 2043 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); 2044 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH); 2045 goto err; 2046 } 2047 2048 for (nc = 0; nc < llen;) { 2049 n2s(p, l); 2050 if ((l + nc + 2) > llen) { 2051 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG)) 2052 goto cont; /* netscape bugs */ 2053 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); 2054 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, SSL_R_CA_DN_TOO_LONG); 2055 goto err; 2056 } 2057 2058 q = p; 2059 2060 if ((xn = d2i_X509_NAME(NULL, &q, l)) == NULL) { 2061 /* If netscape tolerance is on, ignore errors */ 2062 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG) 2063 goto cont; 2064 else { 2065 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); 2066 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_ASN1_LIB); 2067 goto err; 2068 } 2069 } 2070 2071 if (q != (p + l)) { 2072 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); 2073 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, 2074 SSL_R_CA_DN_LENGTH_MISMATCH); 2075 goto err; 2076 } 2077 if (!sk_X509_NAME_push(ca_sk, xn)) { 2078 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); 2079 goto err; 2080 } 2081 2082 p += l; 2083 nc += l + 2; 2084 } 2085 2086 if (0) { 2087 cont: 2088 ERR_clear_error(); 2089 } 2090 2091 /* we should setup a certificate to return.... */ 2092 s->s3->tmp.cert_req = 1; 2093 s->s3->tmp.ctype_num = ctype_num; 2094 if (s->s3->tmp.ca_names != NULL) 2095 sk_X509_NAME_pop_free(s->s3->tmp.ca_names, X509_NAME_free); 2096 s->s3->tmp.ca_names = ca_sk; 2097 ca_sk = NULL; 2098 2099 ret = 1; 2100 goto done; 2101 err: 2102 s->state = SSL_ST_ERR; 2103 done: 2104 if (ca_sk != NULL) 2105 sk_X509_NAME_pop_free(ca_sk, X509_NAME_free); 2106 return (ret); 2107} 2108 2109static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b) 2110{ 2111 return (X509_NAME_cmp(*a, *b)); 2112} 2113 2114#ifndef OPENSSL_NO_TLSEXT 2115int ssl3_get_new_session_ticket(SSL *s) 2116{ 2117 int ok, al, ret = 0, ticklen; 2118 long n; 2119 const unsigned char *p; 2120 unsigned char *d; 2121 2122 n = s->method->ssl_get_message(s, 2123 SSL3_ST_CR_SESSION_TICKET_A, 2124 SSL3_ST_CR_SESSION_TICKET_B, 2125 SSL3_MT_NEWSESSION_TICKET, 16384, &ok); 2126 2127 if (!ok) 2128 return ((int)n); 2129 2130 if (n < 6) { 2131 /* need at least ticket_lifetime_hint + ticket length */ 2132 al = SSL_AD_DECODE_ERROR; 2133 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); 2134 goto f_err; 2135 } 2136 2137 p = d = (unsigned char *)s->init_msg; 2138 2139 if (s->session->session_id_length > 0) { 2140 int i = s->session_ctx->session_cache_mode; 2141 SSL_SESSION *new_sess; 2142 /* 2143 * We reused an existing session, so we need to replace it with a new 2144 * one 2145 */ 2146 if (i & SSL_SESS_CACHE_CLIENT) { 2147 /* 2148 * Remove the old session from the cache 2149 */ 2150 if (i & SSL_SESS_CACHE_NO_INTERNAL_STORE) { 2151 if (s->session_ctx->remove_session_cb != NULL) 2152 s->session_ctx->remove_session_cb(s->session_ctx, 2153 s->session); 2154 } else { 2155 /* We carry on if this fails */ 2156 SSL_CTX_remove_session(s->session_ctx, s->session); 2157 } 2158 } 2159 2160 if ((new_sess = ssl_session_dup(s->session, 0)) == 0) { 2161 al = SSL_AD_INTERNAL_ERROR; 2162 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); 2163 goto f_err; 2164 } 2165 2166 SSL_SESSION_free(s->session); 2167 s->session = new_sess; 2168 } 2169 2170 n2l(p, s->session->tlsext_tick_lifetime_hint); 2171 n2s(p, ticklen); 2172 /* ticket_lifetime_hint + ticket_length + ticket */ 2173 if (ticklen + 6 != n) { 2174 al = SSL_AD_DECODE_ERROR; 2175 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); 2176 goto f_err; 2177 } 2178 if (s->session->tlsext_tick) { 2179 OPENSSL_free(s->session->tlsext_tick); 2180 s->session->tlsext_ticklen = 0; 2181 } 2182 s->session->tlsext_tick = OPENSSL_malloc(ticklen); 2183 if (!s->session->tlsext_tick) { 2184 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); 2185 goto err; 2186 } 2187 memcpy(s->session->tlsext_tick, p, ticklen); 2188 s->session->tlsext_ticklen = ticklen; 2189 /* 2190 * There are two ways to detect a resumed ticket session. One is to set 2191 * an appropriate session ID and then the server must return a match in 2192 * ServerHello. This allows the normal client session ID matching to work 2193 * and we know much earlier that the ticket has been accepted. The 2194 * other way is to set zero length session ID when the ticket is 2195 * presented and rely on the handshake to determine session resumption. 2196 * We choose the former approach because this fits in with assumptions 2197 * elsewhere in OpenSSL. The session ID is set to the SHA256 (or SHA1 is 2198 * SHA256 is disabled) hash of the ticket. 2199 */ 2200 EVP_Digest(p, ticklen, 2201 s->session->session_id, &s->session->session_id_length, 2202# ifndef OPENSSL_NO_SHA256 2203 EVP_sha256(), NULL); 2204# else 2205 EVP_sha1(), NULL); 2206# endif 2207 ret = 1; 2208 return (ret); 2209 f_err: 2210 ssl3_send_alert(s, SSL3_AL_FATAL, al); 2211 err: 2212 s->state = SSL_ST_ERR; 2213 return (-1); 2214} 2215 2216int ssl3_get_cert_status(SSL *s) 2217{ 2218 int ok, al; 2219 unsigned long resplen, n; 2220 const unsigned char *p; 2221 2222 n = s->method->ssl_get_message(s, 2223 SSL3_ST_CR_CERT_STATUS_A, 2224 SSL3_ST_CR_CERT_STATUS_B, 2225 SSL3_MT_CERTIFICATE_STATUS, 16384, &ok); 2226 2227 if (!ok) 2228 return ((int)n); 2229 if (n < 4) { 2230 /* need at least status type + length */ 2231 al = SSL_AD_DECODE_ERROR; 2232 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, SSL_R_LENGTH_MISMATCH); 2233 goto f_err; 2234 } 2235 p = (unsigned char *)s->init_msg; 2236 if (*p++ != TLSEXT_STATUSTYPE_ocsp) { 2237 al = SSL_AD_DECODE_ERROR; 2238 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, SSL_R_UNSUPPORTED_STATUS_TYPE); 2239 goto f_err; 2240 } 2241 n2l3(p, resplen); 2242 if (resplen + 4 != n) { 2243 al = SSL_AD_DECODE_ERROR; 2244 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, SSL_R_LENGTH_MISMATCH); 2245 goto f_err; 2246 } 2247 if (s->tlsext_ocsp_resp) 2248 OPENSSL_free(s->tlsext_ocsp_resp); 2249 s->tlsext_ocsp_resp = BUF_memdup(p, resplen); 2250 if (!s->tlsext_ocsp_resp) { 2251 al = SSL_AD_INTERNAL_ERROR; 2252 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, ERR_R_MALLOC_FAILURE); 2253 goto f_err; 2254 } 2255 s->tlsext_ocsp_resplen = resplen; 2256 if (s->ctx->tlsext_status_cb) { 2257 int ret; 2258 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg); 2259 if (ret == 0) { 2260 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE; 2261 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, SSL_R_INVALID_STATUS_RESPONSE); 2262 goto f_err; 2263 } 2264 if (ret < 0) { 2265 al = SSL_AD_INTERNAL_ERROR; 2266 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, ERR_R_MALLOC_FAILURE); 2267 goto f_err; 2268 } 2269 } 2270 return 1; 2271 f_err: 2272 ssl3_send_alert(s, SSL3_AL_FATAL, al); 2273 s->state = SSL_ST_ERR; 2274 return (-1); 2275} 2276#endif 2277 2278int ssl3_get_server_done(SSL *s) 2279{ 2280 int ok, ret = 0; 2281 long n; 2282 2283 /* Second to last param should be very small, like 0 :-) */ 2284 n = s->method->ssl_get_message(s, 2285 SSL3_ST_CR_SRVR_DONE_A, 2286 SSL3_ST_CR_SRVR_DONE_B, 2287 SSL3_MT_SERVER_DONE, 30, &ok); 2288 2289 if (!ok) 2290 return ((int)n); 2291 if (n > 0) { 2292 /* should contain no data */ 2293 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); 2294 SSLerr(SSL_F_SSL3_GET_SERVER_DONE, SSL_R_LENGTH_MISMATCH); 2295 s->state = SSL_ST_ERR; 2296 return -1; 2297 } 2298 ret = 1; 2299 return (ret); 2300} 2301 2302int ssl3_send_client_key_exchange(SSL *s) 2303{ 2304 unsigned char *p, *d; 2305 int n; 2306 unsigned long alg_k; 2307#ifndef OPENSSL_NO_RSA 2308 unsigned char *q; 2309 EVP_PKEY *pkey = NULL; 2310#endif 2311#ifndef OPENSSL_NO_KRB5 2312 KSSL_ERR kssl_err; 2313#endif /* OPENSSL_NO_KRB5 */ 2314#ifndef OPENSSL_NO_ECDH 2315 EC_KEY *clnt_ecdh = NULL; 2316 const EC_POINT *srvr_ecpoint = NULL; 2317 EVP_PKEY *srvr_pub_pkey = NULL; 2318 unsigned char *encodedPoint = NULL; 2319 int encoded_pt_len = 0; 2320 BN_CTX *bn_ctx = NULL; 2321#endif 2322 2323 if (s->state == SSL3_ST_CW_KEY_EXCH_A) { 2324 d = (unsigned char *)s->init_buf->data; 2325 p = &(d[4]); 2326 2327 alg_k = s->s3->tmp.new_cipher->algorithm_mkey; 2328 2329 /* Fool emacs indentation */ 2330 if (0) { 2331 } 2332#ifndef OPENSSL_NO_RSA 2333 else if (alg_k & SSL_kRSA) { 2334 RSA *rsa; 2335 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; 2336 2337 if (s->session->sess_cert == NULL) { 2338 /* 2339 * We should always have a server certificate with SSL_kRSA. 2340 */ 2341 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2342 ERR_R_INTERNAL_ERROR); 2343 goto err; 2344 } 2345 2346 if (s->session->sess_cert->peer_rsa_tmp != NULL) 2347 rsa = s->session->sess_cert->peer_rsa_tmp; 2348 else { 2349 pkey = 2350 X509_get_pubkey(s->session-> 2351 sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC]. 2352 x509); 2353 if ((pkey == NULL) || (pkey->type != EVP_PKEY_RSA) 2354 || (pkey->pkey.rsa == NULL)) { 2355 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2356 ERR_R_INTERNAL_ERROR); 2357 goto err; 2358 } 2359 rsa = pkey->pkey.rsa; 2360 EVP_PKEY_free(pkey); 2361 } 2362 2363 tmp_buf[0] = s->client_version >> 8; 2364 tmp_buf[1] = s->client_version & 0xff; 2365 if (RAND_bytes(&(tmp_buf[2]), sizeof tmp_buf - 2) <= 0) 2366 goto err; 2367 2368 s->session->master_key_length = sizeof tmp_buf; 2369 2370 q = p; 2371 /* Fix buf for TLS and beyond */ 2372 if (s->version > SSL3_VERSION) 2373 p += 2; 2374 n = RSA_public_encrypt(sizeof tmp_buf, 2375 tmp_buf, p, rsa, RSA_PKCS1_PADDING); 2376# ifdef PKCS1_CHECK 2377 if (s->options & SSL_OP_PKCS1_CHECK_1) 2378 p[1]++; 2379 if (s->options & SSL_OP_PKCS1_CHECK_2) 2380 tmp_buf[0] = 0x70; 2381# endif 2382 if (n <= 0) { 2383 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2384 SSL_R_BAD_RSA_ENCRYPT); 2385 goto err; 2386 } 2387 2388 /* Fix buf for TLS and beyond */ 2389 if (s->version > SSL3_VERSION) { 2390 s2n(n, q); 2391 n += 2; 2392 } 2393 2394 s->session->master_key_length = 2395 s->method->ssl3_enc->generate_master_secret(s, 2396 s-> 2397 session->master_key, 2398 tmp_buf, 2399 sizeof tmp_buf); 2400 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf); 2401 } 2402#endif 2403#ifndef OPENSSL_NO_KRB5 2404 else if (alg_k & SSL_kKRB5) { 2405 krb5_error_code krb5rc; 2406 KSSL_CTX *kssl_ctx = s->kssl_ctx; 2407 /* krb5_data krb5_ap_req; */ 2408 krb5_data *enc_ticket; 2409 krb5_data authenticator, *authp = NULL; 2410 EVP_CIPHER_CTX ciph_ctx; 2411 const EVP_CIPHER *enc = NULL; 2412 unsigned char iv[EVP_MAX_IV_LENGTH]; 2413 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; 2414 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH + EVP_MAX_IV_LENGTH]; 2415 int padl, outl = sizeof(epms); 2416 2417 EVP_CIPHER_CTX_init(&ciph_ctx); 2418 2419# ifdef KSSL_DEBUG 2420 fprintf(stderr, "ssl3_send_client_key_exchange(%lx & %lx)\n", 2421 alg_k, SSL_kKRB5); 2422# endif /* KSSL_DEBUG */ 2423 2424 authp = NULL; 2425# ifdef KRB5SENDAUTH 2426 if (KRB5SENDAUTH) 2427 authp = &authenticator; 2428# endif /* KRB5SENDAUTH */ 2429 2430 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp, &kssl_err); 2431 enc = kssl_map_enc(kssl_ctx->enctype); 2432 if (enc == NULL) 2433 goto err; 2434# ifdef KSSL_DEBUG 2435 { 2436 fprintf(stderr, "kssl_cget_tkt rtn %d\n", krb5rc); 2437 if (krb5rc && kssl_err.text) 2438 fprintf(stderr, "kssl_cget_tkt kssl_err=%s\n", 2439 kssl_err.text); 2440 } 2441# endif /* KSSL_DEBUG */ 2442 2443 if (krb5rc) { 2444 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); 2445 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, kssl_err.reason); 2446 goto err; 2447 } 2448 2449 /*- 2450 * 20010406 VRS - Earlier versions used KRB5 AP_REQ 2451 * in place of RFC 2712 KerberosWrapper, as in: 2452 * 2453 * Send ticket (copy to *p, set n = length) 2454 * n = krb5_ap_req.length; 2455 * memcpy(p, krb5_ap_req.data, krb5_ap_req.length); 2456 * if (krb5_ap_req.data) 2457 * kssl_krb5_free_data_contents(NULL,&krb5_ap_req); 2458 * 2459 * Now using real RFC 2712 KerberosWrapper 2460 * (Thanks to Simon Wilkinson <sxw@sxw.org.uk>) 2461 * Note: 2712 "opaque" types are here replaced 2462 * with a 2-byte length followed by the value. 2463 * Example: 2464 * KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms 2465 * Where "xx xx" = length bytes. Shown here with 2466 * optional authenticator omitted. 2467 */ 2468 2469 /* KerberosWrapper.Ticket */ 2470 s2n(enc_ticket->length, p); 2471 memcpy(p, enc_ticket->data, enc_ticket->length); 2472 p += enc_ticket->length; 2473 n = enc_ticket->length + 2; 2474 2475 /* KerberosWrapper.Authenticator */ 2476 if (authp && authp->length) { 2477 s2n(authp->length, p); 2478 memcpy(p, authp->data, authp->length); 2479 p += authp->length; 2480 n += authp->length + 2; 2481 2482 free(authp->data); 2483 authp->data = NULL; 2484 authp->length = 0; 2485 } else { 2486 s2n(0, p); /* null authenticator length */ 2487 n += 2; 2488 } 2489 2490 tmp_buf[0] = s->client_version >> 8; 2491 tmp_buf[1] = s->client_version & 0xff; 2492 if (RAND_bytes(&(tmp_buf[2]), sizeof tmp_buf - 2) <= 0) 2493 goto err; 2494 2495 /*- 2496 * 20010420 VRS. Tried it this way; failed. 2497 * EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL); 2498 * EVP_CIPHER_CTX_set_key_length(&ciph_ctx, 2499 * kssl_ctx->length); 2500 * EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv); 2501 */ 2502 2503 memset(iv, 0, sizeof iv); /* per RFC 1510 */ 2504 EVP_EncryptInit_ex(&ciph_ctx, enc, NULL, kssl_ctx->key, iv); 2505 EVP_EncryptUpdate(&ciph_ctx, epms, &outl, tmp_buf, 2506 sizeof tmp_buf); 2507 EVP_EncryptFinal_ex(&ciph_ctx, &(epms[outl]), &padl); 2508 outl += padl; 2509 if (outl > (int)sizeof epms) { 2510 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2511 ERR_R_INTERNAL_ERROR); 2512 goto err; 2513 } 2514 EVP_CIPHER_CTX_cleanup(&ciph_ctx); 2515 2516 /* KerberosWrapper.EncryptedPreMasterSecret */ 2517 s2n(outl, p); 2518 memcpy(p, epms, outl); 2519 p += outl; 2520 n += outl + 2; 2521 2522 s->session->master_key_length = 2523 s->method->ssl3_enc->generate_master_secret(s, 2524 s-> 2525 session->master_key, 2526 tmp_buf, 2527 sizeof tmp_buf); 2528 2529 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf); 2530 OPENSSL_cleanse(epms, outl); 2531 } 2532#endif 2533#ifndef OPENSSL_NO_DH 2534 else if (alg_k & (SSL_kEDH | SSL_kDHr | SSL_kDHd)) { 2535 DH *dh_srvr, *dh_clnt; 2536 2537 if (s->session->sess_cert == NULL) { 2538 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE); 2539 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2540 SSL_R_UNEXPECTED_MESSAGE); 2541 goto err; 2542 } 2543 2544 if (s->session->sess_cert->peer_dh_tmp != NULL) 2545 dh_srvr = s->session->sess_cert->peer_dh_tmp; 2546 else { 2547 /* we get them from the cert */ 2548 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); 2549 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2550 SSL_R_UNABLE_TO_FIND_DH_PARAMETERS); 2551 goto err; 2552 } 2553 2554 /* generate a new random key */ 2555 if ((dh_clnt = DHparams_dup(dh_srvr)) == NULL) { 2556 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB); 2557 goto err; 2558 } 2559 if (!DH_generate_key(dh_clnt)) { 2560 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB); 2561 DH_free(dh_clnt); 2562 goto err; 2563 } 2564 2565 /* 2566 * use the 'p' output buffer for the DH key, but make sure to 2567 * clear it out afterwards 2568 */ 2569 2570 n = DH_compute_key(p, dh_srvr->pub_key, dh_clnt); 2571 2572 if (n <= 0) { 2573 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB); 2574 DH_free(dh_clnt); 2575 goto err; 2576 } 2577 2578 /* generate master key from the result */ 2579 s->session->master_key_length = 2580 s->method->ssl3_enc->generate_master_secret(s, 2581 s-> 2582 session->master_key, 2583 p, n); 2584 /* clean up */ 2585 memset(p, 0, n); 2586 2587 /* send off the data */ 2588 n = BN_num_bytes(dh_clnt->pub_key); 2589 s2n(n, p); 2590 BN_bn2bin(dh_clnt->pub_key, p); 2591 n += 2; 2592 2593 DH_free(dh_clnt); 2594 } 2595#endif 2596 2597#ifndef OPENSSL_NO_ECDH 2598 else if (alg_k & (SSL_kEECDH | SSL_kECDHr | SSL_kECDHe)) { 2599 const EC_GROUP *srvr_group = NULL; 2600 EC_KEY *tkey; 2601 int ecdh_clnt_cert = 0; 2602 int field_size = 0; 2603 2604 if (s->session->sess_cert == NULL) { 2605 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE); 2606 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2607 SSL_R_UNEXPECTED_MESSAGE); 2608 goto err; 2609 } 2610 2611 /* 2612 * Did we send out the client's ECDH share for use in premaster 2613 * computation as part of client certificate? If so, set 2614 * ecdh_clnt_cert to 1. 2615 */ 2616 if ((alg_k & (SSL_kECDHr | SSL_kECDHe)) && (s->cert != NULL)) { 2617 /*- 2618 * XXX: For now, we do not support client 2619 * authentication using ECDH certificates. 2620 * To add such support, one needs to add 2621 * code that checks for appropriate 2622 * conditions and sets ecdh_clnt_cert to 1. 2623 * For example, the cert have an ECC 2624 * key on the same curve as the server's 2625 * and the key should be authorized for 2626 * key agreement. 2627 * 2628 * One also needs to add code in ssl3_connect 2629 * to skip sending the certificate verify 2630 * message. 2631 * 2632 * if ((s->cert->key->privatekey != NULL) && 2633 * (s->cert->key->privatekey->type == 2634 * EVP_PKEY_EC) && ...) 2635 * ecdh_clnt_cert = 1; 2636 */ 2637 } 2638 2639 if (s->session->sess_cert->peer_ecdh_tmp != NULL) { 2640 tkey = s->session->sess_cert->peer_ecdh_tmp; 2641 } else { 2642 /* Get the Server Public Key from Cert */ 2643 srvr_pub_pkey = 2644 X509_get_pubkey(s->session-> 2645 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509); 2646 if ((srvr_pub_pkey == NULL) 2647 || (srvr_pub_pkey->type != EVP_PKEY_EC) 2648 || (srvr_pub_pkey->pkey.ec == NULL)) { 2649 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2650 ERR_R_INTERNAL_ERROR); 2651 goto err; 2652 } 2653 2654 tkey = srvr_pub_pkey->pkey.ec; 2655 } 2656 2657 srvr_group = EC_KEY_get0_group(tkey); 2658 srvr_ecpoint = EC_KEY_get0_public_key(tkey); 2659 2660 if ((srvr_group == NULL) || (srvr_ecpoint == NULL)) { 2661 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2662 ERR_R_INTERNAL_ERROR); 2663 goto err; 2664 } 2665 2666 if ((clnt_ecdh = EC_KEY_new()) == NULL) { 2667 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2668 ERR_R_MALLOC_FAILURE); 2669 goto err; 2670 } 2671 2672 if (!EC_KEY_set_group(clnt_ecdh, srvr_group)) { 2673 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB); 2674 goto err; 2675 } 2676 if (ecdh_clnt_cert) { 2677 /* 2678 * Reuse key info from our certificate We only need our 2679 * private key to perform the ECDH computation. 2680 */ 2681 const BIGNUM *priv_key; 2682 tkey = s->cert->key->privatekey->pkey.ec; 2683 priv_key = EC_KEY_get0_private_key(tkey); 2684 if (priv_key == NULL) { 2685 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2686 ERR_R_MALLOC_FAILURE); 2687 goto err; 2688 } 2689 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key)) { 2690 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB); 2691 goto err; 2692 } 2693 } else { 2694 /* Generate a new ECDH key pair */ 2695 if (!(EC_KEY_generate_key(clnt_ecdh))) { 2696 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2697 ERR_R_ECDH_LIB); 2698 goto err; 2699 } 2700 } 2701 2702 /* 2703 * use the 'p' output buffer for the ECDH key, but make sure to 2704 * clear it out afterwards 2705 */ 2706 2707 field_size = EC_GROUP_get_degree(srvr_group); 2708 if (field_size <= 0) { 2709 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB); 2710 goto err; 2711 } 2712 n = ECDH_compute_key(p, (field_size + 7) / 8, srvr_ecpoint, 2713 clnt_ecdh, NULL); 2714 if (n <= 0) { 2715 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB); 2716 goto err; 2717 } 2718 2719 /* generate master key from the result */ 2720 s->session->master_key_length = 2721 s->method->ssl3_enc->generate_master_secret(s, 2722 s-> 2723 session->master_key, 2724 p, n); 2725 2726 memset(p, 0, n); /* clean up */ 2727 2728 if (ecdh_clnt_cert) { 2729 /* Send empty client key exch message */ 2730 n = 0; 2731 } else { 2732 /* 2733 * First check the size of encoding and allocate memory 2734 * accordingly. 2735 */ 2736 encoded_pt_len = 2737 EC_POINT_point2oct(srvr_group, 2738 EC_KEY_get0_public_key(clnt_ecdh), 2739 POINT_CONVERSION_UNCOMPRESSED, 2740 NULL, 0, NULL); 2741 2742 encodedPoint = (unsigned char *) 2743 OPENSSL_malloc(encoded_pt_len * sizeof(unsigned char)); 2744 bn_ctx = BN_CTX_new(); 2745 if ((encodedPoint == NULL) || (bn_ctx == NULL)) { 2746 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2747 ERR_R_MALLOC_FAILURE); 2748 goto err; 2749 } 2750 2751 /* Encode the public key */ 2752 n = EC_POINT_point2oct(srvr_group, 2753 EC_KEY_get0_public_key(clnt_ecdh), 2754 POINT_CONVERSION_UNCOMPRESSED, 2755 encodedPoint, encoded_pt_len, bn_ctx); 2756 2757 *p = n; /* length of encoded point */ 2758 /* Encoded point will be copied here */ 2759 p += 1; 2760 /* copy the point */ 2761 memcpy((unsigned char *)p, encodedPoint, n); 2762 /* increment n to account for length field */ 2763 n += 1; 2764 } 2765 2766 /* Free allocated memory */ 2767 BN_CTX_free(bn_ctx); 2768 if (encodedPoint != NULL) 2769 OPENSSL_free(encodedPoint); 2770 if (clnt_ecdh != NULL) 2771 EC_KEY_free(clnt_ecdh); 2772 EVP_PKEY_free(srvr_pub_pkey); 2773 } 2774#endif /* !OPENSSL_NO_ECDH */ 2775 else if (alg_k & SSL_kGOST) { 2776 /* GOST key exchange message creation */ 2777 EVP_PKEY_CTX *pkey_ctx; 2778 X509 *peer_cert; 2779 size_t msglen; 2780 unsigned int md_len; 2781 int keytype; 2782 unsigned char premaster_secret[32], shared_ukm[32], tmp[256]; 2783 EVP_MD_CTX *ukm_hash; 2784 EVP_PKEY *pub_key; 2785 2786 /* 2787 * Get server sertificate PKEY and create ctx from it 2788 */ 2789 peer_cert = 2790 s->session-> 2791 sess_cert->peer_pkeys[(keytype = SSL_PKEY_GOST01)].x509; 2792 if (!peer_cert) 2793 peer_cert = 2794 s->session-> 2795 sess_cert->peer_pkeys[(keytype = SSL_PKEY_GOST94)].x509; 2796 if (!peer_cert) { 2797 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2798 SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER); 2799 goto err; 2800 } 2801 2802 pkey_ctx = EVP_PKEY_CTX_new(pub_key = 2803 X509_get_pubkey(peer_cert), NULL); 2804 /* 2805 * If we have send a certificate, and certificate key 2806 * 2807 * * parameters match those of server certificate, use 2808 * certificate key for key exchange 2809 */ 2810 2811 /* Otherwise, generate ephemeral key pair */ 2812 2813 EVP_PKEY_encrypt_init(pkey_ctx); 2814 /* Generate session key */ 2815 if (RAND_bytes(premaster_secret, 32) <= 0) { 2816 EVP_PKEY_CTX_free(pkey_ctx); 2817 goto err; 2818 } 2819 /* 2820 * If we have client certificate, use its secret as peer key 2821 */ 2822 if (s->s3->tmp.cert_req && s->cert->key->privatekey) { 2823 if (EVP_PKEY_derive_set_peer 2824 (pkey_ctx, s->cert->key->privatekey) <= 0) { 2825 /* 2826 * If there was an error - just ignore it. Ephemeral key 2827 * * would be used 2828 */ 2829 ERR_clear_error(); 2830 } 2831 } 2832 /* 2833 * Compute shared IV and store it in algorithm-specific context 2834 * data 2835 */ 2836 ukm_hash = EVP_MD_CTX_create(); 2837 EVP_DigestInit(ukm_hash, 2838 EVP_get_digestbynid(NID_id_GostR3411_94)); 2839 EVP_DigestUpdate(ukm_hash, s->s3->client_random, 2840 SSL3_RANDOM_SIZE); 2841 EVP_DigestUpdate(ukm_hash, s->s3->server_random, 2842 SSL3_RANDOM_SIZE); 2843 EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len); 2844 EVP_MD_CTX_destroy(ukm_hash); 2845 if (EVP_PKEY_CTX_ctrl 2846 (pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, EVP_PKEY_CTRL_SET_IV, 8, 2847 shared_ukm) < 0) { 2848 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2849 SSL_R_LIBRARY_BUG); 2850 goto err; 2851 } 2852 /* Make GOST keytransport blob message */ 2853 /* 2854 * Encapsulate it into sequence 2855 */ 2856 *(p++) = V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED; 2857 msglen = 255; 2858 if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, premaster_secret, 32) 2859 < 0) { 2860 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2861 SSL_R_LIBRARY_BUG); 2862 goto err; 2863 } 2864 if (msglen >= 0x80) { 2865 *(p++) = 0x81; 2866 *(p++) = msglen & 0xff; 2867 n = msglen + 3; 2868 } else { 2869 *(p++) = msglen & 0xff; 2870 n = msglen + 2; 2871 } 2872 memcpy(p, tmp, msglen); 2873 /* Check if pubkey from client certificate was used */ 2874 if (EVP_PKEY_CTX_ctrl 2875 (pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0) { 2876 /* Set flag "skip certificate verify" */ 2877 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY; 2878 } 2879 EVP_PKEY_CTX_free(pkey_ctx); 2880 s->session->master_key_length = 2881 s->method->ssl3_enc->generate_master_secret(s, 2882 s-> 2883 session->master_key, 2884 premaster_secret, 2885 32); 2886 EVP_PKEY_free(pub_key); 2887 2888 } 2889#ifndef OPENSSL_NO_SRP 2890 else if (alg_k & SSL_kSRP) { 2891 if (s->srp_ctx.A != NULL) { 2892 /* send off the data */ 2893 n = BN_num_bytes(s->srp_ctx.A); 2894 s2n(n, p); 2895 BN_bn2bin(s->srp_ctx.A, p); 2896 n += 2; 2897 } else { 2898 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2899 ERR_R_INTERNAL_ERROR); 2900 goto err; 2901 } 2902 if (s->session->srp_username != NULL) 2903 OPENSSL_free(s->session->srp_username); 2904 s->session->srp_username = BUF_strdup(s->srp_ctx.login); 2905 if (s->session->srp_username == NULL) { 2906 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2907 ERR_R_MALLOC_FAILURE); 2908 goto err; 2909 } 2910 2911 if ((s->session->master_key_length = 2912 SRP_generate_client_master_secret(s, 2913 s->session->master_key)) < 2914 0) { 2915 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2916 ERR_R_INTERNAL_ERROR); 2917 goto err; 2918 } 2919 } 2920#endif 2921#ifndef OPENSSL_NO_PSK 2922 else if (alg_k & SSL_kPSK) { 2923 /* 2924 * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a 2925 * \0-terminated identity. The last byte is for us for simulating 2926 * strnlen. 2927 */ 2928 char identity[PSK_MAX_IDENTITY_LEN + 2]; 2929 size_t identity_len; 2930 unsigned char *t = NULL; 2931 unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN * 2 + 4]; 2932 unsigned int pre_ms_len = 0, psk_len = 0; 2933 int psk_err = 1; 2934 2935 n = 0; 2936 if (s->psk_client_callback == NULL) { 2937 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2938 SSL_R_PSK_NO_CLIENT_CB); 2939 goto err; 2940 } 2941 2942 memset(identity, 0, sizeof(identity)); 2943 psk_len = s->psk_client_callback(s, s->session->psk_identity_hint, 2944 identity, sizeof(identity) - 1, 2945 psk_or_pre_ms, 2946 sizeof(psk_or_pre_ms)); 2947 if (psk_len > PSK_MAX_PSK_LEN) { 2948 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2949 ERR_R_INTERNAL_ERROR); 2950 goto psk_err; 2951 } else if (psk_len == 0) { 2952 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2953 SSL_R_PSK_IDENTITY_NOT_FOUND); 2954 goto psk_err; 2955 } 2956 identity[PSK_MAX_IDENTITY_LEN + 1] = '\0'; 2957 identity_len = strlen(identity); 2958 if (identity_len > PSK_MAX_IDENTITY_LEN) { 2959 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2960 ERR_R_INTERNAL_ERROR); 2961 goto psk_err; 2962 } 2963 /* create PSK pre_master_secret */ 2964 pre_ms_len = 2 + psk_len + 2 + psk_len; 2965 t = psk_or_pre_ms; 2966 memmove(psk_or_pre_ms + psk_len + 4, psk_or_pre_ms, psk_len); 2967 s2n(psk_len, t); 2968 memset(t, 0, psk_len); 2969 t += psk_len; 2970 s2n(psk_len, t); 2971 2972 if (s->session->psk_identity_hint != NULL) 2973 OPENSSL_free(s->session->psk_identity_hint); 2974 s->session->psk_identity_hint = 2975 BUF_strdup(s->ctx->psk_identity_hint); 2976 if (s->ctx->psk_identity_hint != NULL 2977 && s->session->psk_identity_hint == NULL) { 2978 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2979 ERR_R_MALLOC_FAILURE); 2980 goto psk_err; 2981 } 2982 2983 if (s->session->psk_identity != NULL) 2984 OPENSSL_free(s->session->psk_identity); 2985 s->session->psk_identity = BUF_strdup(identity); 2986 if (s->session->psk_identity == NULL) { 2987 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2988 ERR_R_MALLOC_FAILURE); 2989 goto psk_err; 2990 } 2991 2992 s->session->master_key_length = 2993 s->method->ssl3_enc->generate_master_secret(s, 2994 s-> 2995 session->master_key, 2996 psk_or_pre_ms, 2997 pre_ms_len); 2998 s2n(identity_len, p); 2999 memcpy(p, identity, identity_len); 3000 n = 2 + identity_len; 3001 psk_err = 0; 3002 psk_err: 3003 OPENSSL_cleanse(identity, sizeof(identity)); 3004 OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms)); 3005 if (psk_err != 0) { 3006 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); 3007 goto err; 3008 } 3009 } 3010#endif 3011 else { 3012 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); 3013 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); 3014 goto err; 3015 } 3016 3017 *(d++) = SSL3_MT_CLIENT_KEY_EXCHANGE; 3018 l2n3(n, d); 3019 3020 s->state = SSL3_ST_CW_KEY_EXCH_B; 3021 /* number of bytes to write */ 3022 s->init_num = n + 4; 3023 s->init_off = 0; 3024 } 3025 3026 /* SSL3_ST_CW_KEY_EXCH_B */ 3027 return (ssl3_do_write(s, SSL3_RT_HANDSHAKE)); 3028 err: 3029#ifndef OPENSSL_NO_ECDH 3030 BN_CTX_free(bn_ctx); 3031 if (encodedPoint != NULL) 3032 OPENSSL_free(encodedPoint); 3033 if (clnt_ecdh != NULL) 3034 EC_KEY_free(clnt_ecdh); 3035 EVP_PKEY_free(srvr_pub_pkey); 3036#endif 3037 s->state = SSL_ST_ERR; 3038 return (-1); 3039} 3040 3041int ssl3_send_client_verify(SSL *s) 3042{ 3043 unsigned char *p, *d; 3044 unsigned char data[MD5_DIGEST_LENGTH + SHA_DIGEST_LENGTH]; 3045 EVP_PKEY *pkey; 3046 EVP_PKEY_CTX *pctx = NULL; 3047 EVP_MD_CTX mctx; 3048 unsigned u = 0; 3049 unsigned long n; 3050 int j; 3051 3052 EVP_MD_CTX_init(&mctx); 3053 3054 if (s->state == SSL3_ST_CW_CERT_VRFY_A) { 3055 d = (unsigned char *)s->init_buf->data; 3056 p = &(d[4]); 3057 pkey = s->cert->key->privatekey; 3058/* Create context from key and test if sha1 is allowed as digest */ 3059 pctx = EVP_PKEY_CTX_new(pkey, NULL); 3060 EVP_PKEY_sign_init(pctx); 3061 if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1()) > 0) { 3062 if (TLS1_get_version(s) < TLS1_2_VERSION) 3063 s->method->ssl3_enc->cert_verify_mac(s, 3064 NID_sha1, 3065 &(data 3066 [MD5_DIGEST_LENGTH])); 3067 } else { 3068 ERR_clear_error(); 3069 } 3070 /* 3071 * For TLS v1.2 send signature algorithm and signature using agreed 3072 * digest and cached handshake records. 3073 */ 3074 if (TLS1_get_version(s) >= TLS1_2_VERSION) { 3075 long hdatalen = 0; 3076 void *hdata; 3077 const EVP_MD *md = s->cert->key->digest; 3078 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, &hdata); 3079 if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md)) { 3080 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR); 3081 goto err; 3082 } 3083 p += 2; 3084#ifdef SSL_DEBUG 3085 fprintf(stderr, "Using TLS 1.2 with client alg %s\n", 3086 EVP_MD_name(md)); 3087#endif 3088 if (!EVP_SignInit_ex(&mctx, md, NULL) 3089 || !EVP_SignUpdate(&mctx, hdata, hdatalen) 3090 || !EVP_SignFinal(&mctx, p + 2, &u, pkey)) { 3091 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_EVP_LIB); 3092 goto err; 3093 } 3094 s2n(u, p); 3095 n = u + 4; 3096 if (!ssl3_digest_cached_records(s)) 3097 goto err; 3098 } else 3099#ifndef OPENSSL_NO_RSA 3100 if (pkey->type == EVP_PKEY_RSA) { 3101 s->method->ssl3_enc->cert_verify_mac(s, NID_md5, &(data[0])); 3102 if (RSA_sign(NID_md5_sha1, data, 3103 MD5_DIGEST_LENGTH + SHA_DIGEST_LENGTH, 3104 &(p[2]), &u, pkey->pkey.rsa) <= 0) { 3105 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_RSA_LIB); 3106 goto err; 3107 } 3108 s2n(u, p); 3109 n = u + 2; 3110 } else 3111#endif 3112#ifndef OPENSSL_NO_DSA 3113 if (pkey->type == EVP_PKEY_DSA) { 3114 if (!DSA_sign(pkey->save_type, 3115 &(data[MD5_DIGEST_LENGTH]), 3116 SHA_DIGEST_LENGTH, &(p[2]), 3117 (unsigned int *)&j, pkey->pkey.dsa)) { 3118 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_DSA_LIB); 3119 goto err; 3120 } 3121 s2n(j, p); 3122 n = j + 2; 3123 } else 3124#endif 3125#ifndef OPENSSL_NO_ECDSA 3126 if (pkey->type == EVP_PKEY_EC) { 3127 if (!ECDSA_sign(pkey->save_type, 3128 &(data[MD5_DIGEST_LENGTH]), 3129 SHA_DIGEST_LENGTH, &(p[2]), 3130 (unsigned int *)&j, pkey->pkey.ec)) { 3131 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_ECDSA_LIB); 3132 goto err; 3133 } 3134 s2n(j, p); 3135 n = j + 2; 3136 } else 3137#endif 3138 if (pkey->type == NID_id_GostR3410_94 3139 || pkey->type == NID_id_GostR3410_2001) { 3140 unsigned char signbuf[64]; 3141 int i; 3142 size_t sigsize = 64; 3143 s->method->ssl3_enc->cert_verify_mac(s, 3144 NID_id_GostR3411_94, data); 3145 if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) { 3146 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR); 3147 goto err; 3148 } 3149 for (i = 63, j = 0; i >= 0; j++, i--) { 3150 p[2 + j] = signbuf[i]; 3151 } 3152 s2n(j, p); 3153 n = j + 2; 3154 } else { 3155 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR); 3156 goto err; 3157 } 3158 *(d++) = SSL3_MT_CERTIFICATE_VERIFY; 3159 l2n3(n, d); 3160 3161 s->state = SSL3_ST_CW_CERT_VRFY_B; 3162 s->init_num = (int)n + 4; 3163 s->init_off = 0; 3164 } 3165 EVP_MD_CTX_cleanup(&mctx); 3166 EVP_PKEY_CTX_free(pctx); 3167 return (ssl3_do_write(s, SSL3_RT_HANDSHAKE)); 3168 err: 3169 EVP_MD_CTX_cleanup(&mctx); 3170 EVP_PKEY_CTX_free(pctx); 3171 s->state = SSL_ST_ERR; 3172 return (-1); 3173} 3174 3175int ssl3_send_client_certificate(SSL *s) 3176{ 3177 X509 *x509 = NULL; 3178 EVP_PKEY *pkey = NULL; 3179 int i; 3180 unsigned long l; 3181 3182 if (s->state == SSL3_ST_CW_CERT_A) { 3183 if ((s->cert == NULL) || 3184 (s->cert->key->x509 == NULL) || 3185 (s->cert->key->privatekey == NULL)) 3186 s->state = SSL3_ST_CW_CERT_B; 3187 else 3188 s->state = SSL3_ST_CW_CERT_C; 3189 } 3190 3191 /* We need to get a client cert */ 3192 if (s->state == SSL3_ST_CW_CERT_B) { 3193 /* 3194 * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP; 3195 * return(-1); We then get retied later 3196 */ 3197 i = 0; 3198 i = ssl_do_client_cert_cb(s, &x509, &pkey); 3199 if (i < 0) { 3200 s->rwstate = SSL_X509_LOOKUP; 3201 return (-1); 3202 } 3203 s->rwstate = SSL_NOTHING; 3204 if ((i == 1) && (pkey != NULL) && (x509 != NULL)) { 3205 s->state = SSL3_ST_CW_CERT_B; 3206 if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey)) 3207 i = 0; 3208 } else if (i == 1) { 3209 i = 0; 3210 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE, 3211 SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); 3212 } 3213 3214 if (x509 != NULL) 3215 X509_free(x509); 3216 if (pkey != NULL) 3217 EVP_PKEY_free(pkey); 3218 if (i == 0) { 3219 if (s->version == SSL3_VERSION) { 3220 s->s3->tmp.cert_req = 0; 3221 ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE); 3222 return (1); 3223 } else { 3224 s->s3->tmp.cert_req = 2; 3225 } 3226 } 3227 3228 /* Ok, we have a cert */ 3229 s->state = SSL3_ST_CW_CERT_C; 3230 } 3231 3232 if (s->state == SSL3_ST_CW_CERT_C) { 3233 s->state = SSL3_ST_CW_CERT_D; 3234 l = ssl3_output_cert_chain(s, 3235 (s->s3->tmp.cert_req == 3236 2) ? NULL : s->cert->key->x509); 3237 if (!l) { 3238 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR); 3239 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); 3240 s->state = SSL_ST_ERR; 3241 return 0; 3242 } 3243 s->init_num = (int)l; 3244 s->init_off = 0; 3245 } 3246 /* SSL3_ST_CW_CERT_D */ 3247 return (ssl3_do_write(s, SSL3_RT_HANDSHAKE)); 3248} 3249 3250#define has_bits(i,m) (((i)&(m)) == (m)) 3251 3252int ssl3_check_cert_and_algorithm(SSL *s) 3253{ 3254 int i, idx; 3255 long alg_k, alg_a; 3256 EVP_PKEY *pkey = NULL; 3257 int pkey_bits; 3258 SESS_CERT *sc; 3259#ifndef OPENSSL_NO_RSA 3260 RSA *rsa; 3261#endif 3262#ifndef OPENSSL_NO_DH 3263 DH *dh; 3264#endif 3265 int al = SSL_AD_HANDSHAKE_FAILURE; 3266 3267 alg_k = s->s3->tmp.new_cipher->algorithm_mkey; 3268 alg_a = s->s3->tmp.new_cipher->algorithm_auth; 3269 3270 /* we don't have a certificate */ 3271 if ((alg_a & (SSL_aDH | SSL_aNULL | SSL_aKRB5)) || (alg_k & SSL_kPSK)) 3272 return (1); 3273 3274 sc = s->session->sess_cert; 3275 if (sc == NULL) { 3276 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR); 3277 goto err; 3278 } 3279#ifndef OPENSSL_NO_RSA 3280 rsa = s->session->sess_cert->peer_rsa_tmp; 3281#endif 3282#ifndef OPENSSL_NO_DH 3283 dh = s->session->sess_cert->peer_dh_tmp; 3284#endif 3285 3286 /* This is the passed certificate */ 3287 3288 idx = sc->peer_cert_type; 3289#ifndef OPENSSL_NO_ECDH 3290 if (idx == SSL_PKEY_ECC) { 3291 if (ssl_check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509, s) == 0) { 3292 /* check failed */ 3293 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_BAD_ECC_CERT); 3294 goto f_err; 3295 } else { 3296 return 1; 3297 } 3298 } 3299#endif 3300 pkey = X509_get_pubkey(sc->peer_pkeys[idx].x509); 3301 pkey_bits = EVP_PKEY_bits(pkey); 3302 i = X509_certificate_type(sc->peer_pkeys[idx].x509, pkey); 3303 EVP_PKEY_free(pkey); 3304 3305 /* Check that we have a certificate if we require one */ 3306 if ((alg_a & SSL_aRSA) && !has_bits(i, EVP_PK_RSA | EVP_PKT_SIGN)) { 3307 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, 3308 SSL_R_MISSING_RSA_SIGNING_CERT); 3309 goto f_err; 3310 } 3311#ifndef OPENSSL_NO_DSA 3312 else if ((alg_a & SSL_aDSS) && !has_bits(i, EVP_PK_DSA | EVP_PKT_SIGN)) { 3313 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, 3314 SSL_R_MISSING_DSA_SIGNING_CERT); 3315 goto f_err; 3316 } 3317#endif 3318#ifndef OPENSSL_NO_RSA 3319 if (alg_k & SSL_kRSA) { 3320 if (!SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && 3321 !has_bits(i, EVP_PK_RSA | EVP_PKT_ENC)) { 3322 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, 3323 SSL_R_MISSING_RSA_ENCRYPTING_CERT); 3324 goto f_err; 3325 } else if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)) { 3326 if (pkey_bits <= SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) { 3327 if (!has_bits(i, EVP_PK_RSA | EVP_PKT_ENC)) { 3328 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, 3329 SSL_R_MISSING_RSA_ENCRYPTING_CERT); 3330 goto f_err; 3331 } 3332 if (rsa != NULL) { 3333 /* server key exchange is not allowed. */ 3334 al = SSL_AD_INTERNAL_ERROR; 3335 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR); 3336 goto f_err; 3337 } 3338 } 3339 } 3340 } 3341#endif 3342#ifndef OPENSSL_NO_DH 3343 if ((alg_k & SSL_kEDH) && dh == NULL) { 3344 al = SSL_AD_INTERNAL_ERROR; 3345 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR); 3346 goto f_err; 3347 } 3348 if ((alg_k & SSL_kDHr) && !has_bits(i, EVP_PK_DH | EVP_PKS_RSA)) { 3349 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, 3350 SSL_R_MISSING_DH_RSA_CERT); 3351 goto f_err; 3352 } 3353# ifndef OPENSSL_NO_DSA 3354 if ((alg_k & SSL_kDHd) && !has_bits(i, EVP_PK_DH | EVP_PKS_DSA)) { 3355 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, 3356 SSL_R_MISSING_DH_DSA_CERT); 3357 goto f_err; 3358 } 3359# endif 3360 3361 /* Check DHE only: static DH not implemented. */ 3362 if (alg_k & SSL_kEDH) { 3363 int dh_size = BN_num_bits(dh->p); 3364 if ((!SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && dh_size < 768) 3365 || (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && dh_size < 512)) { 3366 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_DH_KEY_TOO_SMALL); 3367 goto f_err; 3368 } 3369 } 3370#endif /* !OPENSSL_NO_DH */ 3371 3372 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && 3373 pkey_bits > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) { 3374#ifndef OPENSSL_NO_RSA 3375 if (alg_k & SSL_kRSA) { 3376 if (rsa == NULL) { 3377 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, 3378 SSL_R_MISSING_EXPORT_TMP_RSA_KEY); 3379 goto f_err; 3380 } else if (BN_num_bits(rsa->n) > 3381 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) { 3382 /* We have a temporary RSA key but it's too large. */ 3383 al = SSL_AD_EXPORT_RESTRICTION; 3384 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, 3385 SSL_R_MISSING_EXPORT_TMP_RSA_KEY); 3386 goto f_err; 3387 } 3388 } else 3389#endif 3390#ifndef OPENSSL_NO_DH 3391 if (alg_k & SSL_kEDH) { 3392 if (BN_num_bits(dh->p) > 3393 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) { 3394 /* We have a temporary DH key but it's too large. */ 3395 al = SSL_AD_EXPORT_RESTRICTION; 3396 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, 3397 SSL_R_MISSING_EXPORT_TMP_DH_KEY); 3398 goto f_err; 3399 } 3400 } else if (alg_k & (SSL_kDHr | SSL_kDHd)) { 3401 /* The cert should have had an export DH key. */ 3402 al = SSL_AD_EXPORT_RESTRICTION; 3403 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, 3404 SSL_R_MISSING_EXPORT_TMP_DH_KEY); 3405 goto f_err; 3406 } else 3407#endif 3408 { 3409 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, 3410 SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE); 3411 goto f_err; 3412 } 3413 } 3414 return (1); 3415 f_err: 3416 ssl3_send_alert(s, SSL3_AL_FATAL, al); 3417 err: 3418 return (0); 3419} 3420 3421#ifndef OPENSSL_NO_TLSEXT 3422/* 3423 * Normally, we can tell if the server is resuming the session from 3424 * the session ID. EAP-FAST (RFC 4851), however, relies on the next server 3425 * message after the ServerHello to determine if the server is resuming. 3426 * Therefore, we allow EAP-FAST to peek ahead. 3427 * ssl3_check_finished returns 1 if we are resuming from an external 3428 * pre-shared secret, we have a "ticket" and the next server handshake message 3429 * is Finished; and 0 otherwise. It returns -1 upon an error. 3430 */ 3431static int ssl3_check_finished(SSL *s) 3432{ 3433 int ok = 0; 3434 3435 if (s->version < TLS1_VERSION || !s->tls_session_secret_cb || 3436 !s->session->tlsext_tick) 3437 return 0; 3438 3439 /* Need to permit this temporarily, in case the next message is Finished. */ 3440 s->s3->flags |= SSL3_FLAGS_CCS_OK; 3441 /* 3442 * This function is called when we might get a Certificate message instead, 3443 * so permit appropriate message length. 3444 * We ignore the return value as we're only interested in the message type 3445 * and not its length. 3446 */ 3447 s->method->ssl_get_message(s, 3448 SSL3_ST_CR_CERT_A, 3449 SSL3_ST_CR_CERT_B, 3450 -1, s->max_cert_list, &ok); 3451 s->s3->flags &= ~SSL3_FLAGS_CCS_OK; 3452 3453 if (!ok) 3454 return -1; 3455 3456 s->s3->tmp.reuse_message = 1; 3457 3458 if (s->s3->tmp.message_type == SSL3_MT_FINISHED) 3459 return 1; 3460 3461 /* If we're not done, then the CCS arrived early and we should bail. */ 3462 if (s->s3->change_cipher_spec) { 3463 SSLerr(SSL_F_SSL3_CHECK_FINISHED, SSL_R_CCS_RECEIVED_EARLY); 3464 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE); 3465 return -1; 3466 } 3467 3468 return 0; 3469} 3470 3471# ifndef OPENSSL_NO_NEXTPROTONEG 3472int ssl3_send_next_proto(SSL *s) 3473{ 3474 unsigned int len, padding_len; 3475 unsigned char *d; 3476 3477 if (s->state == SSL3_ST_CW_NEXT_PROTO_A) { 3478 len = s->next_proto_negotiated_len; 3479 padding_len = 32 - ((len + 2) % 32); 3480 d = (unsigned char *)s->init_buf->data; 3481 d[4] = len; 3482 memcpy(d + 5, s->next_proto_negotiated, len); 3483 d[5 + len] = padding_len; 3484 memset(d + 6 + len, 0, padding_len); 3485 *(d++) = SSL3_MT_NEXT_PROTO; 3486 l2n3(2 + len + padding_len, d); 3487 s->state = SSL3_ST_CW_NEXT_PROTO_B; 3488 s->init_num = 4 + 2 + len + padding_len; 3489 s->init_off = 0; 3490 } 3491 3492 return ssl3_do_write(s, SSL3_RT_HANDSHAKE); 3493} 3494#endif /* !OPENSSL_NO_NEXTPROTONEG */ 3495#endif /* !OPENSSL_NO_TLSEXT */ 3496 3497int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey) 3498{ 3499 int i = 0; 3500#ifndef OPENSSL_NO_ENGINE 3501 if (s->ctx->client_cert_engine) { 3502 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s, 3503 SSL_get_client_CA_list(s), 3504 px509, ppkey, NULL, NULL, NULL); 3505 if (i != 0) 3506 return i; 3507 } 3508#endif 3509 if (s->ctx->client_cert_cb) 3510 i = s->ctx->client_cert_cb(s, px509, ppkey); 3511 return i; 3512} 3513