s3_clnt.c revision 325335
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 s->state = SSL_ST_ERR; 267 goto end; 268 } 269 270 /* setup buffing BIO */ 271 if (!ssl_init_wbio_buffer(s, 0)) { 272 ret = -1; 273 s->state = SSL_ST_ERR; 274 goto end; 275 } 276 277 /* don't push the buffering BIO quite yet */ 278 279 if (!ssl3_init_finished_mac(s)) { 280 ret = -1; 281 s->state = SSL_ST_ERR; 282 goto end; 283 } 284 285 s->state = SSL3_ST_CW_CLNT_HELLO_A; 286 s->ctx->stats.sess_connect++; 287 s->init_num = 0; 288 s->s3->flags &= ~SSL3_FLAGS_CCS_OK; 289 /* 290 * Should have been reset by ssl3_get_finished, too. 291 */ 292 s->s3->change_cipher_spec = 0; 293 break; 294 295 case SSL3_ST_CW_CLNT_HELLO_A: 296 case SSL3_ST_CW_CLNT_HELLO_B: 297 298 s->shutdown = 0; 299 ret = ssl3_client_hello(s); 300 if (ret <= 0) 301 goto end; 302 s->state = SSL3_ST_CR_SRVR_HELLO_A; 303 s->init_num = 0; 304 305 /* turn on buffering for the next lot of output */ 306 if (s->bbio != s->wbio) 307 s->wbio = BIO_push(s->bbio, s->wbio); 308 309 break; 310 311 case SSL3_ST_CR_SRVR_HELLO_A: 312 case SSL3_ST_CR_SRVR_HELLO_B: 313 ret = ssl3_get_server_hello(s); 314 if (ret <= 0) 315 goto end; 316 317 if (s->hit) { 318 s->state = SSL3_ST_CR_FINISHED_A; 319#ifndef OPENSSL_NO_TLSEXT 320 if (s->tlsext_ticket_expected) { 321 /* receive renewed session ticket */ 322 s->state = SSL3_ST_CR_SESSION_TICKET_A; 323 } 324#endif 325 } else { 326 s->state = SSL3_ST_CR_CERT_A; 327 } 328 s->init_num = 0; 329 break; 330 case SSL3_ST_CR_CERT_A: 331 case SSL3_ST_CR_CERT_B: 332#ifndef OPENSSL_NO_TLSEXT 333 /* Noop (ret = 0) for everything but EAP-FAST. */ 334 ret = ssl3_check_finished(s); 335 if (ret < 0) 336 goto end; 337 if (ret == 1) { 338 s->hit = 1; 339 s->state = SSL3_ST_CR_FINISHED_A; 340 s->init_num = 0; 341 break; 342 } 343#endif 344 /* Check if it is anon DH/ECDH, SRP auth */ 345 /* or PSK */ 346 if (! 347 (s->s3->tmp. 348 new_cipher->algorithm_auth & (SSL_aNULL | SSL_aSRP)) 349 && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) { 350 ret = ssl3_get_server_certificate(s); 351 if (ret <= 0) 352 goto end; 353#ifndef OPENSSL_NO_TLSEXT 354 if (s->tlsext_status_expected) 355 s->state = SSL3_ST_CR_CERT_STATUS_A; 356 else 357 s->state = SSL3_ST_CR_KEY_EXCH_A; 358 } else { 359 skip = 1; 360 s->state = SSL3_ST_CR_KEY_EXCH_A; 361 } 362#else 363 } else 364 skip = 1; 365 366 s->state = SSL3_ST_CR_KEY_EXCH_A; 367#endif 368 s->init_num = 0; 369 break; 370 371 case SSL3_ST_CR_KEY_EXCH_A: 372 case SSL3_ST_CR_KEY_EXCH_B: 373 ret = ssl3_get_key_exchange(s); 374 if (ret <= 0) 375 goto end; 376 s->state = SSL3_ST_CR_CERT_REQ_A; 377 s->init_num = 0; 378 379 /* 380 * at this point we check that we have the required stuff from 381 * the server 382 */ 383 if (!ssl3_check_cert_and_algorithm(s)) { 384 ret = -1; 385 s->state = SSL_ST_ERR; 386 goto end; 387 } 388 break; 389 390 case SSL3_ST_CR_CERT_REQ_A: 391 case SSL3_ST_CR_CERT_REQ_B: 392 ret = ssl3_get_certificate_request(s); 393 if (ret <= 0) 394 goto end; 395 s->state = SSL3_ST_CR_SRVR_DONE_A; 396 s->init_num = 0; 397 break; 398 399 case SSL3_ST_CR_SRVR_DONE_A: 400 case SSL3_ST_CR_SRVR_DONE_B: 401 ret = ssl3_get_server_done(s); 402 if (ret <= 0) 403 goto end; 404#ifndef OPENSSL_NO_SRP 405 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) { 406 if ((ret = SRP_Calc_A_param(s)) <= 0) { 407 SSLerr(SSL_F_SSL3_CONNECT, SSL_R_SRP_A_CALC); 408 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); 409 s->state = SSL_ST_ERR; 410 goto end; 411 } 412 } 413#endif 414 if (s->s3->tmp.cert_req) 415 s->state = SSL3_ST_CW_CERT_A; 416 else 417 s->state = SSL3_ST_CW_KEY_EXCH_A; 418 s->init_num = 0; 419 420 break; 421 422 case SSL3_ST_CW_CERT_A: 423 case SSL3_ST_CW_CERT_B: 424 case SSL3_ST_CW_CERT_C: 425 case SSL3_ST_CW_CERT_D: 426 ret = ssl3_send_client_certificate(s); 427 if (ret <= 0) 428 goto end; 429 s->state = SSL3_ST_CW_KEY_EXCH_A; 430 s->init_num = 0; 431 break; 432 433 case SSL3_ST_CW_KEY_EXCH_A: 434 case SSL3_ST_CW_KEY_EXCH_B: 435 ret = ssl3_send_client_key_exchange(s); 436 if (ret <= 0) 437 goto end; 438 /* 439 * EAY EAY EAY need to check for DH fix cert sent back 440 */ 441 /* 442 * For TLS, cert_req is set to 2, so a cert chain of nothing is 443 * sent, but no verify packet is sent 444 */ 445 /* 446 * XXX: For now, we do not support client authentication in ECDH 447 * cipher suites with ECDH (rather than ECDSA) certificates. We 448 * need to skip the certificate verify message when client's 449 * ECDH public key is sent inside the client certificate. 450 */ 451 if (s->s3->tmp.cert_req == 1) { 452 s->state = SSL3_ST_CW_CERT_VRFY_A; 453 } else { 454 s->state = SSL3_ST_CW_CHANGE_A; 455 } 456 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) { 457 s->state = SSL3_ST_CW_CHANGE_A; 458 } 459 460 s->init_num = 0; 461 break; 462 463 case SSL3_ST_CW_CERT_VRFY_A: 464 case SSL3_ST_CW_CERT_VRFY_B: 465 ret = ssl3_send_client_verify(s); 466 if (ret <= 0) 467 goto end; 468 s->state = SSL3_ST_CW_CHANGE_A; 469 s->init_num = 0; 470 break; 471 472 case SSL3_ST_CW_CHANGE_A: 473 case SSL3_ST_CW_CHANGE_B: 474 ret = ssl3_send_change_cipher_spec(s, 475 SSL3_ST_CW_CHANGE_A, 476 SSL3_ST_CW_CHANGE_B); 477 if (ret <= 0) 478 goto end; 479 480#if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG) 481 s->state = SSL3_ST_CW_FINISHED_A; 482#else 483 if (s->s3->next_proto_neg_seen) 484 s->state = SSL3_ST_CW_NEXT_PROTO_A; 485 else 486 s->state = SSL3_ST_CW_FINISHED_A; 487#endif 488 s->init_num = 0; 489 490 s->session->cipher = s->s3->tmp.new_cipher; 491#ifdef OPENSSL_NO_COMP 492 s->session->compress_meth = 0; 493#else 494 if (s->s3->tmp.new_compression == NULL) 495 s->session->compress_meth = 0; 496 else 497 s->session->compress_meth = s->s3->tmp.new_compression->id; 498#endif 499 if (!s->method->ssl3_enc->setup_key_block(s)) { 500 ret = -1; 501 s->state = SSL_ST_ERR; 502 goto end; 503 } 504 505 if (!s->method->ssl3_enc->change_cipher_state(s, 506 SSL3_CHANGE_CIPHER_CLIENT_WRITE)) 507 { 508 ret = -1; 509 s->state = SSL_ST_ERR; 510 goto end; 511 } 512 513 break; 514 515#if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG) 516 case SSL3_ST_CW_NEXT_PROTO_A: 517 case SSL3_ST_CW_NEXT_PROTO_B: 518 ret = ssl3_send_next_proto(s); 519 if (ret <= 0) 520 goto end; 521 s->state = SSL3_ST_CW_FINISHED_A; 522 break; 523#endif 524 525 case SSL3_ST_CW_FINISHED_A: 526 case SSL3_ST_CW_FINISHED_B: 527 ret = ssl3_send_finished(s, 528 SSL3_ST_CW_FINISHED_A, 529 SSL3_ST_CW_FINISHED_B, 530 s->method-> 531 ssl3_enc->client_finished_label, 532 s->method-> 533 ssl3_enc->client_finished_label_len); 534 if (ret <= 0) 535 goto end; 536 s->state = SSL3_ST_CW_FLUSH; 537 538 /* clear flags */ 539 s->s3->flags &= ~SSL3_FLAGS_POP_BUFFER; 540 if (s->hit) { 541 s->s3->tmp.next_state = SSL_ST_OK; 542 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED) { 543 s->state = SSL_ST_OK; 544 s->s3->flags |= SSL3_FLAGS_POP_BUFFER; 545 s->s3->delay_buf_pop_ret = 0; 546 } 547 } else { 548#ifndef OPENSSL_NO_TLSEXT 549 /* 550 * Allow NewSessionTicket if ticket expected 551 */ 552 if (s->tlsext_ticket_expected) 553 s->s3->tmp.next_state = SSL3_ST_CR_SESSION_TICKET_A; 554 else 555#endif 556 557 s->s3->tmp.next_state = SSL3_ST_CR_FINISHED_A; 558 } 559 s->init_num = 0; 560 break; 561 562#ifndef OPENSSL_NO_TLSEXT 563 case SSL3_ST_CR_SESSION_TICKET_A: 564 case SSL3_ST_CR_SESSION_TICKET_B: 565 ret = ssl3_get_new_session_ticket(s); 566 if (ret <= 0) 567 goto end; 568 s->state = SSL3_ST_CR_FINISHED_A; 569 s->init_num = 0; 570 break; 571 572 case SSL3_ST_CR_CERT_STATUS_A: 573 case SSL3_ST_CR_CERT_STATUS_B: 574 ret = ssl3_get_cert_status(s); 575 if (ret <= 0) 576 goto end; 577 s->state = SSL3_ST_CR_KEY_EXCH_A; 578 s->init_num = 0; 579 break; 580#endif 581 582 case SSL3_ST_CR_FINISHED_A: 583 case SSL3_ST_CR_FINISHED_B: 584 if (!s->s3->change_cipher_spec) 585 s->s3->flags |= SSL3_FLAGS_CCS_OK; 586 ret = ssl3_get_finished(s, SSL3_ST_CR_FINISHED_A, 587 SSL3_ST_CR_FINISHED_B); 588 if (ret <= 0) 589 goto end; 590 591 if (s->hit) 592 s->state = SSL3_ST_CW_CHANGE_A; 593 else 594 s->state = SSL_ST_OK; 595 s->init_num = 0; 596 break; 597 598 case SSL3_ST_CW_FLUSH: 599 s->rwstate = SSL_WRITING; 600 if (BIO_flush(s->wbio) <= 0) { 601 ret = -1; 602 goto end; 603 } 604 s->rwstate = SSL_NOTHING; 605 s->state = s->s3->tmp.next_state; 606 break; 607 608 case SSL_ST_OK: 609 /* clean a few things up */ 610 ssl3_cleanup_key_block(s); 611 612 if (s->init_buf != NULL) { 613 BUF_MEM_free(s->init_buf); 614 s->init_buf = NULL; 615 } 616 617 /* 618 * If we are not 'joining' the last two packets, remove the 619 * buffering now 620 */ 621 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER)) 622 ssl_free_wbio_buffer(s); 623 /* else do it later in ssl3_write */ 624 625 s->init_num = 0; 626 s->renegotiate = 0; 627 s->new_session = 0; 628 629 ssl_update_cache(s, SSL_SESS_CACHE_CLIENT); 630 if (s->hit) 631 s->ctx->stats.sess_hit++; 632 633 ret = 1; 634 /* s->server=0; */ 635 s->handshake_func = ssl3_connect; 636 s->ctx->stats.sess_connect_good++; 637 638 if (cb != NULL) 639 cb(s, SSL_CB_HANDSHAKE_DONE, 1); 640 641 goto end; 642 /* break; */ 643 644 case SSL_ST_ERR: 645 default: 646 SSLerr(SSL_F_SSL3_CONNECT, SSL_R_UNKNOWN_STATE); 647 ret = -1; 648 goto end; 649 /* break; */ 650 } 651 652 /* did we do anything */ 653 if (!s->s3->tmp.reuse_message && !skip) { 654 if (s->debug) { 655 if ((ret = BIO_flush(s->wbio)) <= 0) 656 goto end; 657 } 658 659 if ((cb != NULL) && (s->state != state)) { 660 new_state = s->state; 661 s->state = state; 662 cb(s, SSL_CB_CONNECT_LOOP, 1); 663 s->state = new_state; 664 } 665 } 666 skip = 0; 667 } 668 end: 669 s->in_handshake--; 670 if (buf != NULL) 671 BUF_MEM_free(buf); 672 if (cb != NULL) 673 cb(s, SSL_CB_CONNECT_EXIT, ret); 674 return (ret); 675} 676 677int ssl3_client_hello(SSL *s) 678{ 679 unsigned char *buf; 680 unsigned char *p, *d; 681 int i; 682 unsigned long l; 683 int al = 0; 684#ifndef OPENSSL_NO_COMP 685 int j; 686 SSL_COMP *comp; 687#endif 688 689 buf = (unsigned char *)s->init_buf->data; 690 if (s->state == SSL3_ST_CW_CLNT_HELLO_A) { 691 SSL_SESSION *sess = s->session; 692 if ((sess == NULL) || (sess->ssl_version != s->version) || 693#ifdef OPENSSL_NO_TLSEXT 694 !sess->session_id_length || 695#else 696 /* 697 * In the case of EAP-FAST, we can have a pre-shared 698 * "ticket" without a session ID. 699 */ 700 (!sess->session_id_length && !sess->tlsext_tick) || 701#endif 702 (sess->not_resumable)) { 703 if (!ssl_get_new_session(s, 0)) 704 goto err; 705 } 706 if (s->method->version == DTLS_ANY_VERSION) { 707 /* Determine which DTLS version to use */ 708 int options = s->options; 709 /* If DTLS 1.2 disabled correct the version number */ 710 if (options & SSL_OP_NO_DTLSv1_2) { 711 if (tls1_suiteb(s)) { 712 SSLerr(SSL_F_SSL3_CLIENT_HELLO, 713 SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE); 714 goto err; 715 } 716 /* 717 * Disabling all versions is silly: return an error. 718 */ 719 if (options & SSL_OP_NO_DTLSv1) { 720 SSLerr(SSL_F_SSL3_CLIENT_HELLO, SSL_R_WRONG_SSL_VERSION); 721 goto err; 722 } 723 /* 724 * Update method so we don't use any DTLS 1.2 features. 725 */ 726 s->method = DTLSv1_client_method(); 727 s->version = DTLS1_VERSION; 728 } else { 729 /* 730 * We only support one version: update method 731 */ 732 if (options & SSL_OP_NO_DTLSv1) 733 s->method = DTLSv1_2_client_method(); 734 s->version = DTLS1_2_VERSION; 735 } 736 s->client_version = s->version; 737 } 738 /* else use the pre-loaded session */ 739 740 p = s->s3->client_random; 741 742 /* 743 * for DTLS if client_random is initialized, reuse it, we are 744 * required to use same upon reply to HelloVerify 745 */ 746 if (SSL_IS_DTLS(s)) { 747 size_t idx; 748 i = 1; 749 for (idx = 0; idx < sizeof(s->s3->client_random); idx++) { 750 if (p[idx]) { 751 i = 0; 752 break; 753 } 754 } 755 } else 756 i = 1; 757 758 if (i && ssl_fill_hello_random(s, 0, p, 759 sizeof(s->s3->client_random)) <= 0) 760 goto err; 761 762 /* Do the message type and length last */ 763 d = p = ssl_handshake_start(s); 764 765 /*- 766 * version indicates the negotiated version: for example from 767 * an SSLv2/v3 compatible client hello). The client_version 768 * field is the maximum version we permit and it is also 769 * used in RSA encrypted premaster secrets. Some servers can 770 * choke if we initially report a higher version then 771 * renegotiate to a lower one in the premaster secret. This 772 * didn't happen with TLS 1.0 as most servers supported it 773 * but it can with TLS 1.1 or later if the server only supports 774 * 1.0. 775 * 776 * Possible scenario with previous logic: 777 * 1. Client hello indicates TLS 1.2 778 * 2. Server hello says TLS 1.0 779 * 3. RSA encrypted premaster secret uses 1.2. 780 * 4. Handhaked proceeds using TLS 1.0. 781 * 5. Server sends hello request to renegotiate. 782 * 6. Client hello indicates TLS v1.0 as we now 783 * know that is maximum server supports. 784 * 7. Server chokes on RSA encrypted premaster secret 785 * containing version 1.0. 786 * 787 * For interoperability it should be OK to always use the 788 * maximum version we support in client hello and then rely 789 * on the checking of version to ensure the servers isn't 790 * being inconsistent: for example initially negotiating with 791 * TLS 1.0 and renegotiating with TLS 1.2. We do this by using 792 * client_version in client hello and not resetting it to 793 * the negotiated version. 794 */ 795#if 0 796 *(p++) = s->version >> 8; 797 *(p++) = s->version & 0xff; 798 s->client_version = s->version; 799#else 800 *(p++) = s->client_version >> 8; 801 *(p++) = s->client_version & 0xff; 802#endif 803 804 /* Random stuff */ 805 memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE); 806 p += SSL3_RANDOM_SIZE; 807 808 /* Session ID */ 809 if (s->new_session) 810 i = 0; 811 else 812 i = s->session->session_id_length; 813 *(p++) = i; 814 if (i != 0) { 815 if (i > (int)sizeof(s->session->session_id)) { 816 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); 817 goto err; 818 } 819 memcpy(p, s->session->session_id, i); 820 p += i; 821 } 822 823 /* cookie stuff for DTLS */ 824 if (SSL_IS_DTLS(s)) { 825 if (s->d1->cookie_len > sizeof(s->d1->cookie)) { 826 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); 827 goto err; 828 } 829 *(p++) = s->d1->cookie_len; 830 memcpy(p, s->d1->cookie, s->d1->cookie_len); 831 p += s->d1->cookie_len; 832 } 833 834 /* Ciphers supported */ 835 i = ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), &(p[2]), 0); 836 if (i == 0) { 837 SSLerr(SSL_F_SSL3_CLIENT_HELLO, SSL_R_NO_CIPHERS_AVAILABLE); 838 goto err; 839 } 840#ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH 841 /* 842 * Some servers hang if client hello > 256 bytes as hack workaround 843 * chop number of supported ciphers to keep it well below this if we 844 * use TLS v1.2 845 */ 846 if (TLS1_get_version(s) >= TLS1_2_VERSION 847 && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH) 848 i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1; 849#endif 850 s2n(i, p); 851 p += i; 852 853 /* COMPRESSION */ 854#ifdef OPENSSL_NO_COMP 855 *(p++) = 1; 856#else 857 858 if ((s->options & SSL_OP_NO_COMPRESSION) 859 || !s->ctx->comp_methods) 860 j = 0; 861 else 862 j = sk_SSL_COMP_num(s->ctx->comp_methods); 863 *(p++) = 1 + j; 864 for (i = 0; i < j; i++) { 865 comp = sk_SSL_COMP_value(s->ctx->comp_methods, i); 866 *(p++) = comp->id; 867 } 868#endif 869 *(p++) = 0; /* Add the NULL method */ 870 871#ifndef OPENSSL_NO_TLSEXT 872 /* TLS extensions */ 873 if (ssl_prepare_clienthello_tlsext(s) <= 0) { 874 SSLerr(SSL_F_SSL3_CLIENT_HELLO, SSL_R_CLIENTHELLO_TLSEXT); 875 goto err; 876 } 877 if ((p = 878 ssl_add_clienthello_tlsext(s, p, buf + SSL3_RT_MAX_PLAIN_LENGTH, 879 &al)) == NULL) { 880 ssl3_send_alert(s, SSL3_AL_FATAL, al); 881 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); 882 goto err; 883 } 884#endif 885 886 l = p - d; 887 ssl_set_handshake_header(s, SSL3_MT_CLIENT_HELLO, l); 888 s->state = SSL3_ST_CW_CLNT_HELLO_B; 889 } 890 891 /* SSL3_ST_CW_CLNT_HELLO_B */ 892 return ssl_do_write(s); 893 err: 894 s->state = SSL_ST_ERR; 895 return (-1); 896} 897 898int ssl3_get_server_hello(SSL *s) 899{ 900 STACK_OF(SSL_CIPHER) *sk; 901 const SSL_CIPHER *c; 902 CERT *ct = s->cert; 903 unsigned char *p, *d; 904 int i, al = SSL_AD_INTERNAL_ERROR, ok; 905 unsigned int j; 906 long n; 907#ifndef OPENSSL_NO_COMP 908 SSL_COMP *comp; 909#endif 910 /* 911 * Hello verify request and/or server hello version may not match so set 912 * first packet if we're negotiating version. 913 */ 914 if (SSL_IS_DTLS(s)) 915 s->first_packet = 1; 916 917 n = s->method->ssl_get_message(s, 918 SSL3_ST_CR_SRVR_HELLO_A, 919 SSL3_ST_CR_SRVR_HELLO_B, -1, 20000, &ok); 920 921 if (!ok) 922 return ((int)n); 923 924 if (SSL_IS_DTLS(s)) { 925 s->first_packet = 0; 926 if (s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST) { 927 if (s->d1->send_cookie == 0) { 928 s->s3->tmp.reuse_message = 1; 929 return 1; 930 } else { /* already sent a cookie */ 931 932 al = SSL_AD_UNEXPECTED_MESSAGE; 933 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_BAD_MESSAGE_TYPE); 934 goto f_err; 935 } 936 } 937 } 938 939 if (s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO) { 940 al = SSL_AD_UNEXPECTED_MESSAGE; 941 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_BAD_MESSAGE_TYPE); 942 goto f_err; 943 } 944 945 d = p = (unsigned char *)s->init_msg; 946 if (s->method->version == DTLS_ANY_VERSION) { 947 /* Work out correct protocol version to use */ 948 int hversion = (p[0] << 8) | p[1]; 949 int options = s->options; 950 if (hversion == DTLS1_2_VERSION && !(options & SSL_OP_NO_DTLSv1_2)) 951 s->method = DTLSv1_2_client_method(); 952 else if (tls1_suiteb(s)) { 953 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, 954 SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE); 955 s->version = hversion; 956 al = SSL_AD_PROTOCOL_VERSION; 957 goto f_err; 958 } else if (hversion == DTLS1_VERSION && !(options & SSL_OP_NO_DTLSv1)) 959 s->method = DTLSv1_client_method(); 960 else { 961 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_WRONG_SSL_VERSION); 962 s->version = hversion; 963 al = SSL_AD_PROTOCOL_VERSION; 964 goto f_err; 965 } 966 s->session->ssl_version = s->version = s->method->version; 967 } 968 969 if ((p[0] != (s->version >> 8)) || (p[1] != (s->version & 0xff))) { 970 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_WRONG_SSL_VERSION); 971 s->version = (s->version & 0xff00) | p[1]; 972 al = SSL_AD_PROTOCOL_VERSION; 973 goto f_err; 974 } 975 p += 2; 976 977 /* load the server hello data */ 978 /* load the server random */ 979 memcpy(s->s3->server_random, p, SSL3_RANDOM_SIZE); 980 p += SSL3_RANDOM_SIZE; 981 982 s->hit = 0; 983 984 /* get the session-id */ 985 j = *(p++); 986 987 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE)) { 988 al = SSL_AD_ILLEGAL_PARAMETER; 989 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_SSL3_SESSION_ID_TOO_LONG); 990 goto f_err; 991 } 992#ifndef OPENSSL_NO_TLSEXT 993 /* 994 * Check if we can resume the session based on external pre-shared secret. 995 * EAP-FAST (RFC 4851) supports two types of session resumption. 996 * Resumption based on server-side state works with session IDs. 997 * Resumption based on pre-shared Protected Access Credentials (PACs) 998 * works by overriding the SessionTicket extension at the application 999 * layer, and does not send a session ID. (We do not know whether EAP-FAST 1000 * servers would honour the session ID.) Therefore, the session ID alone 1001 * is not a reliable indicator of session resumption, so we first check if 1002 * we can resume, and later peek at the next handshake message to see if the 1003 * server wants to resume. 1004 */ 1005 if (s->version >= TLS1_VERSION && s->tls_session_secret_cb && 1006 s->session->tlsext_tick) { 1007 SSL_CIPHER *pref_cipher = NULL; 1008 s->session->master_key_length = sizeof(s->session->master_key); 1009 if (s->tls_session_secret_cb(s, s->session->master_key, 1010 &s->session->master_key_length, 1011 NULL, &pref_cipher, 1012 s->tls_session_secret_cb_arg)) { 1013 s->session->cipher = pref_cipher ? 1014 pref_cipher : ssl_get_cipher_by_char(s, p + j); 1015 } else { 1016 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, ERR_R_INTERNAL_ERROR); 1017 al = SSL_AD_INTERNAL_ERROR; 1018 goto f_err; 1019 } 1020 } 1021#endif /* OPENSSL_NO_TLSEXT */ 1022 1023 if (j != 0 && j == s->session->session_id_length 1024 && memcmp(p, s->session->session_id, j) == 0) { 1025 if (s->sid_ctx_length != s->session->sid_ctx_length 1026 || memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) { 1027 /* actually a client application bug */ 1028 al = SSL_AD_ILLEGAL_PARAMETER; 1029 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, 1030 SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); 1031 goto f_err; 1032 } 1033 s->hit = 1; 1034 } else { 1035 /* 1036 * If we were trying for session-id reuse but the server 1037 * didn't echo the ID, make a new SSL_SESSION. 1038 * In the case of EAP-FAST and PAC, we do not send a session ID, 1039 * so the PAC-based session secret is always preserved. It'll be 1040 * overwritten if the server refuses resumption. 1041 */ 1042 if (s->session->session_id_length > 0) { 1043 if (!ssl_get_new_session(s, 0)) { 1044 goto f_err; 1045 } 1046 } 1047 s->session->session_id_length = j; 1048 memcpy(s->session->session_id, p, j); /* j could be 0 */ 1049 } 1050 p += j; 1051 c = ssl_get_cipher_by_char(s, p); 1052 if (c == NULL) { 1053 /* unknown cipher */ 1054 al = SSL_AD_ILLEGAL_PARAMETER; 1055 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_UNKNOWN_CIPHER_RETURNED); 1056 goto f_err; 1057 } 1058 /* Set version disabled mask now we know version */ 1059 if (!SSL_USE_TLS1_2_CIPHERS(s)) 1060 ct->mask_ssl = SSL_TLSV1_2; 1061 else 1062 ct->mask_ssl = 0; 1063 /* 1064 * If it is a disabled cipher we didn't send it in client hello, so 1065 * return an error. 1066 */ 1067 if (c->algorithm_ssl & ct->mask_ssl || 1068 c->algorithm_mkey & ct->mask_k || c->algorithm_auth & ct->mask_a) { 1069 al = SSL_AD_ILLEGAL_PARAMETER; 1070 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED); 1071 goto f_err; 1072 } 1073 p += ssl_put_cipher_by_char(s, NULL, NULL); 1074 1075 sk = ssl_get_ciphers_by_id(s); 1076 i = sk_SSL_CIPHER_find(sk, c); 1077 if (i < 0) { 1078 /* we did not say we would use this cipher */ 1079 al = SSL_AD_ILLEGAL_PARAMETER; 1080 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED); 1081 goto f_err; 1082 } 1083 1084 /* 1085 * Depending on the session caching (internal/external), the cipher 1086 * and/or cipher_id values may not be set. Make sure that cipher_id is 1087 * set and use it for comparison. 1088 */ 1089 if (s->session->cipher) 1090 s->session->cipher_id = s->session->cipher->id; 1091 if (s->hit && (s->session->cipher_id != c->id)) { 1092/* Workaround is now obsolete */ 1093#if 0 1094 if (!(s->options & SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG)) 1095#endif 1096 { 1097 al = SSL_AD_ILLEGAL_PARAMETER; 1098 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, 1099 SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); 1100 goto f_err; 1101 } 1102 } 1103 s->s3->tmp.new_cipher = c; 1104 /* 1105 * Don't digest cached records if no sigalgs: we may need them for client 1106 * authentication. 1107 */ 1108 if (!SSL_USE_SIGALGS(s) && !ssl3_digest_cached_records(s)) 1109 goto f_err; 1110 /* lets get the compression algorithm */ 1111 /* COMPRESSION */ 1112#ifdef OPENSSL_NO_COMP 1113 if (*(p++) != 0) { 1114 al = SSL_AD_ILLEGAL_PARAMETER; 1115 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, 1116 SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); 1117 goto f_err; 1118 } 1119 /* 1120 * If compression is disabled we'd better not try to resume a session 1121 * using compression. 1122 */ 1123 if (s->session->compress_meth != 0) { 1124 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_INCONSISTENT_COMPRESSION); 1125 goto f_err; 1126 } 1127#else 1128 j = *(p++); 1129 if (s->hit && j != s->session->compress_meth) { 1130 al = SSL_AD_ILLEGAL_PARAMETER; 1131 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, 1132 SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED); 1133 goto f_err; 1134 } 1135 if (j == 0) 1136 comp = NULL; 1137 else if (s->options & SSL_OP_NO_COMPRESSION) { 1138 al = SSL_AD_ILLEGAL_PARAMETER; 1139 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_COMPRESSION_DISABLED); 1140 goto f_err; 1141 } else 1142 comp = ssl3_comp_find(s->ctx->comp_methods, j); 1143 1144 if ((j != 0) && (comp == NULL)) { 1145 al = SSL_AD_ILLEGAL_PARAMETER; 1146 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, 1147 SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); 1148 goto f_err; 1149 } else { 1150 s->s3->tmp.new_compression = comp; 1151 } 1152#endif 1153 1154#ifndef OPENSSL_NO_TLSEXT 1155 /* TLS extensions */ 1156 if (!ssl_parse_serverhello_tlsext(s, &p, d, n)) { 1157 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_PARSE_TLSEXT); 1158 goto err; 1159 } 1160#endif 1161 1162 if (p != (d + n)) { 1163 /* wrong packet length */ 1164 al = SSL_AD_DECODE_ERROR; 1165 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_BAD_PACKET_LENGTH); 1166 goto f_err; 1167 } 1168 1169 return (1); 1170 f_err: 1171 ssl3_send_alert(s, SSL3_AL_FATAL, al); 1172 err: 1173 s->state = SSL_ST_ERR; 1174 return (-1); 1175} 1176 1177int ssl3_get_server_certificate(SSL *s) 1178{ 1179 int al, i, ok, ret = -1; 1180 unsigned long n, nc, llen, l; 1181 X509 *x = NULL; 1182 const unsigned char *q, *p; 1183 unsigned char *d; 1184 STACK_OF(X509) *sk = NULL; 1185 SESS_CERT *sc; 1186 EVP_PKEY *pkey = NULL; 1187 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == 1188 * KRB5 */ 1189 1190 n = s->method->ssl_get_message(s, 1191 SSL3_ST_CR_CERT_A, 1192 SSL3_ST_CR_CERT_B, 1193 -1, s->max_cert_list, &ok); 1194 1195 if (!ok) 1196 return ((int)n); 1197 1198 if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) || 1199 ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) && 1200 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE))) { 1201 s->s3->tmp.reuse_message = 1; 1202 return (1); 1203 } 1204 1205 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE) { 1206 al = SSL_AD_UNEXPECTED_MESSAGE; 1207 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, SSL_R_BAD_MESSAGE_TYPE); 1208 goto f_err; 1209 } 1210 p = d = (unsigned char *)s->init_msg; 1211 1212 if ((sk = sk_X509_new_null()) == NULL) { 1213 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); 1214 goto err; 1215 } 1216 1217 n2l3(p, llen); 1218 if (llen + 3 != n) { 1219 al = SSL_AD_DECODE_ERROR; 1220 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, SSL_R_LENGTH_MISMATCH); 1221 goto f_err; 1222 } 1223 for (nc = 0; nc < llen;) { 1224 if (nc + 3 > llen) { 1225 al = SSL_AD_DECODE_ERROR; 1226 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 1227 SSL_R_CERT_LENGTH_MISMATCH); 1228 goto f_err; 1229 } 1230 n2l3(p, l); 1231 if ((l + nc + 3) > llen) { 1232 al = SSL_AD_DECODE_ERROR; 1233 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 1234 SSL_R_CERT_LENGTH_MISMATCH); 1235 goto f_err; 1236 } 1237 1238 q = p; 1239 x = d2i_X509(NULL, &q, l); 1240 if (x == NULL) { 1241 al = SSL_AD_BAD_CERTIFICATE; 1242 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, ERR_R_ASN1_LIB); 1243 goto f_err; 1244 } 1245 if (q != (p + l)) { 1246 al = SSL_AD_DECODE_ERROR; 1247 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 1248 SSL_R_CERT_LENGTH_MISMATCH); 1249 goto f_err; 1250 } 1251 if (!sk_X509_push(sk, x)) { 1252 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); 1253 goto err; 1254 } 1255 x = NULL; 1256 nc += l + 3; 1257 p = q; 1258 } 1259 1260 i = ssl_verify_cert_chain(s, sk); 1261 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0) 1262#ifndef OPENSSL_NO_KRB5 1263 && !((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) && 1264 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5)) 1265#endif /* OPENSSL_NO_KRB5 */ 1266 ) { 1267 al = ssl_verify_alarm_type(s->verify_result); 1268 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 1269 SSL_R_CERTIFICATE_VERIFY_FAILED); 1270 goto f_err; 1271 } 1272 ERR_clear_error(); /* but we keep s->verify_result */ 1273 1274 sc = ssl_sess_cert_new(); 1275 if (sc == NULL) 1276 goto err; 1277 1278 if (s->session->sess_cert) 1279 ssl_sess_cert_free(s->session->sess_cert); 1280 s->session->sess_cert = sc; 1281 1282 sc->cert_chain = sk; 1283 /* 1284 * Inconsistency alert: cert_chain does include the peer's certificate, 1285 * which we don't include in s3_srvr.c 1286 */ 1287 x = sk_X509_value(sk, 0); 1288 sk = NULL; 1289 /* 1290 * VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end 1291 */ 1292 1293 pkey = X509_get_pubkey(x); 1294 1295 /* VRS: allow null cert if auth == KRB5 */ 1296 need_cert = ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) && 1297 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5)) 1298 ? 0 : 1; 1299 1300#ifdef KSSL_DEBUG 1301 fprintf(stderr, "pkey,x = %p, %p\n", pkey, x); 1302 fprintf(stderr, "ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x, pkey)); 1303 fprintf(stderr, "cipher, alg, nc = %s, %lx, %lx, %d\n", 1304 s->s3->tmp.new_cipher->name, 1305 s->s3->tmp.new_cipher->algorithm_mkey, 1306 s->s3->tmp.new_cipher->algorithm_auth, need_cert); 1307#endif /* KSSL_DEBUG */ 1308 1309 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey))) { 1310 x = NULL; 1311 al = SSL3_AL_FATAL; 1312 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 1313 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); 1314 goto f_err; 1315 } 1316 1317 i = ssl_cert_type(x, pkey); 1318 if (need_cert && i < 0) { 1319 x = NULL; 1320 al = SSL3_AL_FATAL; 1321 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 1322 SSL_R_UNKNOWN_CERTIFICATE_TYPE); 1323 goto f_err; 1324 } 1325 1326 if (need_cert) { 1327 int exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher); 1328 if (exp_idx >= 0 && i != exp_idx) { 1329 x = NULL; 1330 al = SSL_AD_ILLEGAL_PARAMETER; 1331 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 1332 SSL_R_WRONG_CERTIFICATE_TYPE); 1333 goto f_err; 1334 } 1335 sc->peer_cert_type = i; 1336 CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509); 1337 /* 1338 * Why would the following ever happen? We just created sc a couple 1339 * of lines ago. 1340 */ 1341 if (sc->peer_pkeys[i].x509 != NULL) 1342 X509_free(sc->peer_pkeys[i].x509); 1343 sc->peer_pkeys[i].x509 = x; 1344 sc->peer_key = &(sc->peer_pkeys[i]); 1345 1346 if (s->session->peer != NULL) 1347 X509_free(s->session->peer); 1348 CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509); 1349 s->session->peer = x; 1350 } else { 1351 sc->peer_cert_type = i; 1352 sc->peer_key = NULL; 1353 1354 if (s->session->peer != NULL) 1355 X509_free(s->session->peer); 1356 s->session->peer = NULL; 1357 } 1358 s->session->verify_result = s->verify_result; 1359 1360 x = NULL; 1361 ret = 1; 1362 if (0) { 1363 f_err: 1364 ssl3_send_alert(s, SSL3_AL_FATAL, al); 1365 err: 1366 s->state = SSL_ST_ERR; 1367 } 1368 1369 EVP_PKEY_free(pkey); 1370 X509_free(x); 1371 sk_X509_pop_free(sk, X509_free); 1372 return (ret); 1373} 1374 1375int ssl3_get_key_exchange(SSL *s) 1376{ 1377#ifndef OPENSSL_NO_RSA 1378 unsigned char *q, md_buf[EVP_MAX_MD_SIZE * 2]; 1379#endif 1380 EVP_MD_CTX md_ctx; 1381 unsigned char *param, *p; 1382 int al, j, ok; 1383 long i, param_len, n, alg_k, alg_a; 1384 EVP_PKEY *pkey = NULL; 1385 const EVP_MD *md = NULL; 1386#ifndef OPENSSL_NO_RSA 1387 RSA *rsa = NULL; 1388#endif 1389#ifndef OPENSSL_NO_DH 1390 DH *dh = NULL; 1391#endif 1392#ifndef OPENSSL_NO_ECDH 1393 EC_KEY *ecdh = NULL; 1394 BN_CTX *bn_ctx = NULL; 1395 EC_POINT *srvr_ecpoint = NULL; 1396 int curve_nid = 0; 1397 int encoded_pt_len = 0; 1398#endif 1399 1400 EVP_MD_CTX_init(&md_ctx); 1401 1402 /* 1403 * use same message size as in ssl3_get_certificate_request() as 1404 * ServerKeyExchange message may be skipped 1405 */ 1406 n = s->method->ssl_get_message(s, 1407 SSL3_ST_CR_KEY_EXCH_A, 1408 SSL3_ST_CR_KEY_EXCH_B, 1409 -1, s->max_cert_list, &ok); 1410 if (!ok) 1411 return ((int)n); 1412 1413 alg_k = s->s3->tmp.new_cipher->algorithm_mkey; 1414 1415 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE) { 1416 /* 1417 * Can't skip server key exchange if this is an ephemeral 1418 * ciphersuite. 1419 */ 1420 if (alg_k & (SSL_kDHE | SSL_kECDHE)) { 1421 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); 1422 al = SSL_AD_UNEXPECTED_MESSAGE; 1423 goto f_err; 1424 } 1425#ifndef OPENSSL_NO_PSK 1426 /* 1427 * In plain PSK ciphersuite, ServerKeyExchange can be omitted if no 1428 * identity hint is sent. Set session->sess_cert anyway to avoid 1429 * problems later. 1430 */ 1431 if (alg_k & SSL_kPSK) { 1432 s->session->sess_cert = ssl_sess_cert_new(); 1433 if (s->ctx->psk_identity_hint) 1434 OPENSSL_free(s->ctx->psk_identity_hint); 1435 s->ctx->psk_identity_hint = NULL; 1436 } 1437#endif 1438 s->s3->tmp.reuse_message = 1; 1439 return (1); 1440 } 1441 1442 param = p = (unsigned char *)s->init_msg; 1443 if (s->session->sess_cert != NULL) { 1444#ifndef OPENSSL_NO_RSA 1445 if (s->session->sess_cert->peer_rsa_tmp != NULL) { 1446 RSA_free(s->session->sess_cert->peer_rsa_tmp); 1447 s->session->sess_cert->peer_rsa_tmp = NULL; 1448 } 1449#endif 1450#ifndef OPENSSL_NO_DH 1451 if (s->session->sess_cert->peer_dh_tmp) { 1452 DH_free(s->session->sess_cert->peer_dh_tmp); 1453 s->session->sess_cert->peer_dh_tmp = NULL; 1454 } 1455#endif 1456#ifndef OPENSSL_NO_ECDH 1457 if (s->session->sess_cert->peer_ecdh_tmp) { 1458 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp); 1459 s->session->sess_cert->peer_ecdh_tmp = NULL; 1460 } 1461#endif 1462 } else { 1463 s->session->sess_cert = ssl_sess_cert_new(); 1464 } 1465 1466 /* Total length of the parameters including the length prefix */ 1467 param_len = 0; 1468 1469 alg_a = s->s3->tmp.new_cipher->algorithm_auth; 1470 1471 al = SSL_AD_DECODE_ERROR; 1472 1473#ifndef OPENSSL_NO_PSK 1474 if (alg_k & SSL_kPSK) { 1475 param_len = 2; 1476 if (param_len > n) { 1477 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); 1478 goto f_err; 1479 } 1480 n2s(p, i); 1481 1482 /* 1483 * Store PSK identity hint for later use, hint is used in 1484 * ssl3_send_client_key_exchange. Assume that the maximum length of 1485 * a PSK identity hint can be as long as the maximum length of a PSK 1486 * identity. 1487 */ 1488 if (i > PSK_MAX_IDENTITY_LEN) { 1489 al = SSL_AD_HANDSHAKE_FAILURE; 1490 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_DATA_LENGTH_TOO_LONG); 1491 goto f_err; 1492 } 1493 if (i > n - param_len) { 1494 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1495 SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH); 1496 goto f_err; 1497 } 1498 param_len += i; 1499 1500 s->session->psk_identity_hint = BUF_strndup((char *)p, i); 1501 if (s->session->psk_identity_hint == NULL) { 1502 al = SSL_AD_HANDSHAKE_FAILURE; 1503 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); 1504 goto f_err; 1505 } 1506 1507 p += i; 1508 n -= param_len; 1509 } else 1510#endif /* !OPENSSL_NO_PSK */ 1511#ifndef OPENSSL_NO_SRP 1512 if (alg_k & SSL_kSRP) { 1513 param_len = 2; 1514 if (param_len > n) { 1515 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); 1516 goto f_err; 1517 } 1518 n2s(p, i); 1519 1520 if (i > n - param_len) { 1521 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SRP_N_LENGTH); 1522 goto f_err; 1523 } 1524 param_len += i; 1525 1526 if (!(s->srp_ctx.N = BN_bin2bn(p, i, NULL))) { 1527 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); 1528 goto err; 1529 } 1530 p += i; 1531 1532 if (2 > n - param_len) { 1533 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); 1534 goto f_err; 1535 } 1536 param_len += 2; 1537 1538 n2s(p, i); 1539 1540 if (i > n - param_len) { 1541 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SRP_G_LENGTH); 1542 goto f_err; 1543 } 1544 param_len += i; 1545 1546 if (!(s->srp_ctx.g = BN_bin2bn(p, i, NULL))) { 1547 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); 1548 goto err; 1549 } 1550 p += i; 1551 1552 if (1 > n - param_len) { 1553 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); 1554 goto f_err; 1555 } 1556 param_len += 1; 1557 1558 i = (unsigned int)(p[0]); 1559 p++; 1560 1561 if (i > n - param_len) { 1562 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SRP_S_LENGTH); 1563 goto f_err; 1564 } 1565 param_len += i; 1566 1567 if (!(s->srp_ctx.s = BN_bin2bn(p, i, NULL))) { 1568 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); 1569 goto err; 1570 } 1571 p += i; 1572 1573 if (2 > n - param_len) { 1574 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); 1575 goto f_err; 1576 } 1577 param_len += 2; 1578 1579 n2s(p, i); 1580 1581 if (i > n - param_len) { 1582 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SRP_B_LENGTH); 1583 goto f_err; 1584 } 1585 param_len += i; 1586 1587 if (!(s->srp_ctx.B = BN_bin2bn(p, i, NULL))) { 1588 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); 1589 goto err; 1590 } 1591 p += i; 1592 n -= param_len; 1593 1594 if (!srp_verify_server_param(s, &al)) { 1595 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SRP_PARAMETERS); 1596 goto f_err; 1597 } 1598 1599/* We must check if there is a certificate */ 1600# ifndef OPENSSL_NO_RSA 1601 if (alg_a & SSL_aRSA) 1602 pkey = 1603 X509_get_pubkey(s->session-> 1604 sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1605# else 1606 if (0) ; 1607# endif 1608# ifndef OPENSSL_NO_DSA 1609 else if (alg_a & SSL_aDSS) 1610 pkey = 1611 X509_get_pubkey(s->session-> 1612 sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN]. 1613 x509); 1614# endif 1615 } else 1616#endif /* !OPENSSL_NO_SRP */ 1617#ifndef OPENSSL_NO_RSA 1618 if (alg_k & SSL_kRSA) { 1619 /* Temporary RSA keys only allowed in export ciphersuites */ 1620 if (!SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)) { 1621 al = SSL_AD_UNEXPECTED_MESSAGE; 1622 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); 1623 goto f_err; 1624 } 1625 if ((rsa = RSA_new()) == NULL) { 1626 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); 1627 goto err; 1628 } 1629 1630 param_len = 2; 1631 if (param_len > n) { 1632 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); 1633 goto f_err; 1634 } 1635 n2s(p, i); 1636 1637 if (i > n - param_len) { 1638 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_RSA_MODULUS_LENGTH); 1639 goto f_err; 1640 } 1641 param_len += i; 1642 1643 if (!(rsa->n = BN_bin2bn(p, i, rsa->n))) { 1644 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); 1645 goto err; 1646 } 1647 p += i; 1648 1649 if (2 > n - param_len) { 1650 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); 1651 goto f_err; 1652 } 1653 param_len += 2; 1654 1655 n2s(p, i); 1656 1657 if (i > n - param_len) { 1658 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_RSA_E_LENGTH); 1659 goto f_err; 1660 } 1661 param_len += i; 1662 1663 if (!(rsa->e = BN_bin2bn(p, i, rsa->e))) { 1664 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); 1665 goto err; 1666 } 1667 p += i; 1668 n -= param_len; 1669 1670 /* this should be because we are using an export cipher */ 1671 if (alg_a & SSL_aRSA) 1672 pkey = 1673 X509_get_pubkey(s->session-> 1674 sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1675 else { 1676 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); 1677 goto err; 1678 } 1679 1680 if (EVP_PKEY_bits(pkey) <= SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) { 1681 al = SSL_AD_UNEXPECTED_MESSAGE; 1682 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); 1683 goto f_err; 1684 } 1685 1686 s->session->sess_cert->peer_rsa_tmp = rsa; 1687 rsa = NULL; 1688 } 1689#else /* OPENSSL_NO_RSA */ 1690 if (0) ; 1691#endif 1692#ifndef OPENSSL_NO_DH 1693 else if (alg_k & SSL_kEDH) { 1694 if ((dh = DH_new()) == NULL) { 1695 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_DH_LIB); 1696 goto err; 1697 } 1698 1699 param_len = 2; 1700 if (param_len > n) { 1701 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); 1702 goto f_err; 1703 } 1704 n2s(p, i); 1705 1706 if (i > n - param_len) { 1707 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_DH_P_LENGTH); 1708 goto f_err; 1709 } 1710 param_len += i; 1711 1712 if (!(dh->p = BN_bin2bn(p, i, NULL))) { 1713 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); 1714 goto err; 1715 } 1716 p += i; 1717 1718 if (2 > n - param_len) { 1719 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); 1720 goto f_err; 1721 } 1722 param_len += 2; 1723 1724 n2s(p, i); 1725 1726 if (i > n - param_len) { 1727 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_DH_G_LENGTH); 1728 goto f_err; 1729 } 1730 param_len += i; 1731 1732 if (!(dh->g = BN_bin2bn(p, i, NULL))) { 1733 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); 1734 goto err; 1735 } 1736 p += i; 1737 1738 if (2 > n - param_len) { 1739 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); 1740 goto f_err; 1741 } 1742 param_len += 2; 1743 1744 n2s(p, i); 1745 1746 if (i > n - param_len) { 1747 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_DH_PUB_KEY_LENGTH); 1748 goto f_err; 1749 } 1750 param_len += i; 1751 1752 if (!(dh->pub_key = BN_bin2bn(p, i, NULL))) { 1753 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); 1754 goto err; 1755 } 1756 p += i; 1757 n -= param_len; 1758 1759 if (BN_is_zero(dh->pub_key)) { 1760 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_DH_PUB_KEY_VALUE); 1761 goto f_err; 1762 } 1763 1764 /*- 1765 * Check that p and g are suitable enough 1766 * 1767 * p is odd 1768 * 1 < g < p - 1 1769 */ 1770 { 1771 BIGNUM *tmp = NULL; 1772 1773 if (!BN_is_odd(dh->p)) { 1774 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_DH_P_VALUE); 1775 goto f_err; 1776 } 1777 if (BN_is_negative(dh->g) || BN_is_zero(dh->g) 1778 || BN_is_one(dh->g)) { 1779 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_DH_G_VALUE); 1780 goto f_err; 1781 } 1782 if ((tmp = BN_new()) == NULL 1783 || BN_copy(tmp, dh->p) == NULL 1784 || !BN_sub_word(tmp, 1)) { 1785 BN_free(tmp); 1786 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); 1787 goto err; 1788 } 1789 if (BN_cmp(dh->g, tmp) >= 0) { 1790 BN_free(tmp); 1791 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_DH_G_VALUE); 1792 goto f_err; 1793 } 1794 BN_free(tmp); 1795 } 1796 1797# ifndef OPENSSL_NO_RSA 1798 if (alg_a & SSL_aRSA) 1799 pkey = 1800 X509_get_pubkey(s->session-> 1801 sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1802# else 1803 if (0) ; 1804# endif 1805# ifndef OPENSSL_NO_DSA 1806 else if (alg_a & SSL_aDSS) 1807 pkey = 1808 X509_get_pubkey(s->session-> 1809 sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN]. 1810 x509); 1811# endif 1812 /* else anonymous DH, so no certificate or pkey. */ 1813 1814 s->session->sess_cert->peer_dh_tmp = dh; 1815 dh = NULL; 1816 } else if ((alg_k & SSL_kDHr) || (alg_k & SSL_kDHd)) { 1817 al = SSL_AD_ILLEGAL_PARAMETER; 1818 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1819 SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER); 1820 goto f_err; 1821 } 1822#endif /* !OPENSSL_NO_DH */ 1823 1824#ifndef OPENSSL_NO_ECDH 1825 else if (alg_k & SSL_kEECDH) { 1826 EC_GROUP *ngroup; 1827 const EC_GROUP *group; 1828 1829 if ((ecdh = EC_KEY_new()) == NULL) { 1830 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); 1831 goto err; 1832 } 1833 1834 /* 1835 * Extract elliptic curve parameters and the server's ephemeral ECDH 1836 * public key. Keep accumulating lengths of various components in 1837 * param_len and make sure it never exceeds n. 1838 */ 1839 1840 /* 1841 * XXX: For now we only support named (not generic) curves and the 1842 * ECParameters in this case is just three bytes. We also need one 1843 * byte for the length of the encoded point 1844 */ 1845 param_len = 4; 1846 if (param_len > n) { 1847 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); 1848 goto f_err; 1849 } 1850 /* 1851 * Check curve is one of our preferences, if not server has sent an 1852 * invalid curve. ECParameters is 3 bytes. 1853 */ 1854 if (!tls1_check_curve(s, p, 3)) { 1855 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_WRONG_CURVE); 1856 goto f_err; 1857 } 1858 1859 if ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0) { 1860 al = SSL_AD_INTERNAL_ERROR; 1861 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1862 SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); 1863 goto f_err; 1864 } 1865 1866 ngroup = EC_GROUP_new_by_curve_name(curve_nid); 1867 if (ngroup == NULL) { 1868 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_EC_LIB); 1869 goto err; 1870 } 1871 if (EC_KEY_set_group(ecdh, ngroup) == 0) { 1872 EC_GROUP_free(ngroup); 1873 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_EC_LIB); 1874 goto err; 1875 } 1876 EC_GROUP_free(ngroup); 1877 1878 group = EC_KEY_get0_group(ecdh); 1879 1880 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && 1881 (EC_GROUP_get_degree(group) > 163)) { 1882 al = SSL_AD_EXPORT_RESTRICTION; 1883 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1884 SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER); 1885 goto f_err; 1886 } 1887 1888 p += 3; 1889 1890 /* Next, get the encoded ECPoint */ 1891 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) || 1892 ((bn_ctx = BN_CTX_new()) == NULL)) { 1893 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); 1894 goto err; 1895 } 1896 1897 encoded_pt_len = *p; /* length of encoded point */ 1898 p += 1; 1899 1900 if ((encoded_pt_len > n - param_len) || 1901 (EC_POINT_oct2point(group, srvr_ecpoint, 1902 p, encoded_pt_len, bn_ctx) == 0)) { 1903 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_ECPOINT); 1904 goto f_err; 1905 } 1906 param_len += encoded_pt_len; 1907 1908 n -= param_len; 1909 p += encoded_pt_len; 1910 1911 /* 1912 * The ECC/TLS specification does not mention the use of DSA to sign 1913 * ECParameters in the server key exchange message. We do support RSA 1914 * and ECDSA. 1915 */ 1916 if (0) ; 1917# ifndef OPENSSL_NO_RSA 1918 else if (alg_a & SSL_aRSA) 1919 pkey = 1920 X509_get_pubkey(s->session-> 1921 sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1922# endif 1923# ifndef OPENSSL_NO_ECDSA 1924 else if (alg_a & SSL_aECDSA) 1925 pkey = 1926 X509_get_pubkey(s->session-> 1927 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509); 1928# endif 1929 /* else anonymous ECDH, so no certificate or pkey. */ 1930 EC_KEY_set_public_key(ecdh, srvr_ecpoint); 1931 s->session->sess_cert->peer_ecdh_tmp = ecdh; 1932 ecdh = NULL; 1933 BN_CTX_free(bn_ctx); 1934 bn_ctx = NULL; 1935 EC_POINT_free(srvr_ecpoint); 1936 srvr_ecpoint = NULL; 1937 } else if (alg_k) { 1938 al = SSL_AD_UNEXPECTED_MESSAGE; 1939 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); 1940 goto f_err; 1941 } 1942#endif /* !OPENSSL_NO_ECDH */ 1943 1944 /* p points to the next byte, there are 'n' bytes left */ 1945 1946 /* if it was signed, check the signature */ 1947 if (pkey != NULL) { 1948 if (SSL_USE_SIGALGS(s)) { 1949 int rv; 1950 if (2 > n) { 1951 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); 1952 goto f_err; 1953 } 1954 rv = tls12_check_peer_sigalg(&md, s, p, pkey); 1955 if (rv == -1) 1956 goto err; 1957 else if (rv == 0) { 1958 goto f_err; 1959 } 1960#ifdef SSL_DEBUG 1961 fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md)); 1962#endif 1963 p += 2; 1964 n -= 2; 1965 } else 1966 md = EVP_sha1(); 1967 1968 if (2 > n) { 1969 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); 1970 goto f_err; 1971 } 1972 n2s(p, i); 1973 n -= 2; 1974 j = EVP_PKEY_size(pkey); 1975 1976 /* 1977 * Check signature length. If n is 0 then signature is empty 1978 */ 1979 if ((i != n) || (n > j) || (n <= 0)) { 1980 /* wrong packet length */ 1981 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_WRONG_SIGNATURE_LENGTH); 1982 goto f_err; 1983 } 1984#ifndef OPENSSL_NO_RSA 1985 if (pkey->type == EVP_PKEY_RSA && !SSL_USE_SIGALGS(s)) { 1986 int num; 1987 unsigned int size; 1988 1989 j = 0; 1990 q = md_buf; 1991 for (num = 2; num > 0; num--) { 1992 EVP_MD_CTX_set_flags(&md_ctx, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW); 1993 if (EVP_DigestInit_ex(&md_ctx, 1994 (num == 2) ? s->ctx->md5 : s->ctx->sha1, 1995 NULL) <= 0 1996 || EVP_DigestUpdate(&md_ctx, &(s->s3->client_random[0]), 1997 SSL3_RANDOM_SIZE) <= 0 1998 || EVP_DigestUpdate(&md_ctx, &(s->s3->server_random[0]), 1999 SSL3_RANDOM_SIZE) <= 0 2000 || EVP_DigestUpdate(&md_ctx, param, param_len) <= 0 2001 || EVP_DigestFinal_ex(&md_ctx, q, &size) <= 0) { 2002 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 2003 ERR_R_INTERNAL_ERROR); 2004 al = SSL_AD_INTERNAL_ERROR; 2005 goto f_err; 2006 } 2007 q += size; 2008 j += size; 2009 } 2010 i = RSA_verify(NID_md5_sha1, md_buf, j, p, n, pkey->pkey.rsa); 2011 if (i < 0) { 2012 al = SSL_AD_DECRYPT_ERROR; 2013 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_RSA_DECRYPT); 2014 goto f_err; 2015 } 2016 if (i == 0) { 2017 /* bad signature */ 2018 al = SSL_AD_DECRYPT_ERROR; 2019 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE); 2020 goto f_err; 2021 } 2022 } else 2023#endif 2024 { 2025 if (EVP_VerifyInit_ex(&md_ctx, md, NULL) <= 0 2026 || EVP_VerifyUpdate(&md_ctx, &(s->s3->client_random[0]), 2027 SSL3_RANDOM_SIZE) <= 0 2028 || EVP_VerifyUpdate(&md_ctx, &(s->s3->server_random[0]), 2029 SSL3_RANDOM_SIZE) <= 0 2030 || EVP_VerifyUpdate(&md_ctx, param, param_len) <= 0) { 2031 al = SSL_AD_INTERNAL_ERROR; 2032 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_EVP_LIB); 2033 goto f_err; 2034 } 2035 if (EVP_VerifyFinal(&md_ctx, p, (int)n, pkey) <= 0) { 2036 /* bad signature */ 2037 al = SSL_AD_DECRYPT_ERROR; 2038 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE); 2039 goto f_err; 2040 } 2041 } 2042 } else { 2043 /* aNULL, aSRP or kPSK do not need public keys */ 2044 if (!(alg_a & (SSL_aNULL | SSL_aSRP)) && !(alg_k & SSL_kPSK)) { 2045 /* Might be wrong key type, check it */ 2046 if (ssl3_check_cert_and_algorithm(s)) 2047 /* Otherwise this shouldn't happen */ 2048 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); 2049 goto err; 2050 } 2051 /* still data left over */ 2052 if (n != 0) { 2053 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_EXTRA_DATA_IN_MESSAGE); 2054 goto f_err; 2055 } 2056 } 2057 EVP_PKEY_free(pkey); 2058 EVP_MD_CTX_cleanup(&md_ctx); 2059 return (1); 2060 f_err: 2061 ssl3_send_alert(s, SSL3_AL_FATAL, al); 2062 err: 2063 EVP_PKEY_free(pkey); 2064#ifndef OPENSSL_NO_RSA 2065 if (rsa != NULL) 2066 RSA_free(rsa); 2067#endif 2068#ifndef OPENSSL_NO_DH 2069 if (dh != NULL) 2070 DH_free(dh); 2071#endif 2072#ifndef OPENSSL_NO_ECDH 2073 BN_CTX_free(bn_ctx); 2074 EC_POINT_free(srvr_ecpoint); 2075 if (ecdh != NULL) 2076 EC_KEY_free(ecdh); 2077#endif 2078 EVP_MD_CTX_cleanup(&md_ctx); 2079 s->state = SSL_ST_ERR; 2080 return (-1); 2081} 2082 2083int ssl3_get_certificate_request(SSL *s) 2084{ 2085 int ok, ret = 0; 2086 unsigned long n, nc, l; 2087 unsigned int llen, ctype_num, i; 2088 X509_NAME *xn = NULL; 2089 const unsigned char *p, *q; 2090 unsigned char *d; 2091 STACK_OF(X509_NAME) *ca_sk = NULL; 2092 2093 n = s->method->ssl_get_message(s, 2094 SSL3_ST_CR_CERT_REQ_A, 2095 SSL3_ST_CR_CERT_REQ_B, 2096 -1, s->max_cert_list, &ok); 2097 2098 if (!ok) 2099 return ((int)n); 2100 2101 s->s3->tmp.cert_req = 0; 2102 2103 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE) { 2104 s->s3->tmp.reuse_message = 1; 2105 /* 2106 * If we get here we don't need any cached handshake records as we 2107 * wont be doing client auth. 2108 */ 2109 if (s->s3->handshake_buffer) { 2110 if (!ssl3_digest_cached_records(s)) 2111 goto err; 2112 } 2113 return (1); 2114 } 2115 2116 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST) { 2117 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE); 2118 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, SSL_R_WRONG_MESSAGE_TYPE); 2119 goto err; 2120 } 2121 2122 /* TLS does not like anon-DH with client cert */ 2123 if (s->version > SSL3_VERSION) { 2124 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) { 2125 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE); 2126 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, 2127 SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER); 2128 goto err; 2129 } 2130 } 2131 2132 p = d = (unsigned char *)s->init_msg; 2133 2134 if ((ca_sk = sk_X509_NAME_new(ca_dn_cmp)) == NULL) { 2135 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); 2136 goto err; 2137 } 2138 2139 /* get the certificate types */ 2140 ctype_num = *(p++); 2141 if (s->cert->ctypes) { 2142 OPENSSL_free(s->cert->ctypes); 2143 s->cert->ctypes = NULL; 2144 } 2145 if (ctype_num > SSL3_CT_NUMBER) { 2146 /* If we exceed static buffer copy all to cert structure */ 2147 s->cert->ctypes = OPENSSL_malloc(ctype_num); 2148 if (s->cert->ctypes == NULL) { 2149 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); 2150 goto err; 2151 } 2152 memcpy(s->cert->ctypes, p, ctype_num); 2153 s->cert->ctype_num = (size_t)ctype_num; 2154 ctype_num = SSL3_CT_NUMBER; 2155 } 2156 for (i = 0; i < ctype_num; i++) 2157 s->s3->tmp.ctype[i] = p[i]; 2158 p += p[-1]; 2159 if (SSL_USE_SIGALGS(s)) { 2160 n2s(p, llen); 2161 /* 2162 * Check we have enough room for signature algorithms and following 2163 * length value. 2164 */ 2165 if ((unsigned long)(p - d + llen + 2) > n) { 2166 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); 2167 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, 2168 SSL_R_DATA_LENGTH_TOO_LONG); 2169 goto err; 2170 } 2171 /* Clear certificate digests and validity flags */ 2172 for (i = 0; i < SSL_PKEY_NUM; i++) { 2173 s->cert->pkeys[i].digest = NULL; 2174 s->cert->pkeys[i].valid_flags = 0; 2175 } 2176 if ((llen & 1) || !tls1_save_sigalgs(s, p, llen)) { 2177 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); 2178 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, 2179 SSL_R_SIGNATURE_ALGORITHMS_ERROR); 2180 goto err; 2181 } 2182 if (!tls1_process_sigalgs(s)) { 2183 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); 2184 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); 2185 goto err; 2186 } 2187 p += llen; 2188 } 2189 2190 /* get the CA RDNs */ 2191 n2s(p, llen); 2192#if 0 2193 { 2194 FILE *out; 2195 out = fopen("/tmp/vsign.der", "w"); 2196 fwrite(p, 1, llen, out); 2197 fclose(out); 2198 } 2199#endif 2200 2201 if ((unsigned long)(p - d + llen) != n) { 2202 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); 2203 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH); 2204 goto err; 2205 } 2206 2207 for (nc = 0; nc < llen;) { 2208 if (nc + 2 > llen) { 2209 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); 2210 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, SSL_R_CA_DN_TOO_LONG); 2211 goto err; 2212 } 2213 n2s(p, l); 2214 if ((l + nc + 2) > llen) { 2215 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG)) 2216 goto cont; /* netscape bugs */ 2217 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); 2218 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, SSL_R_CA_DN_TOO_LONG); 2219 goto err; 2220 } 2221 2222 q = p; 2223 2224 if ((xn = d2i_X509_NAME(NULL, &q, l)) == NULL) { 2225 /* If netscape tolerance is on, ignore errors */ 2226 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG) 2227 goto cont; 2228 else { 2229 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); 2230 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_ASN1_LIB); 2231 goto err; 2232 } 2233 } 2234 2235 if (q != (p + l)) { 2236 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); 2237 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, 2238 SSL_R_CA_DN_LENGTH_MISMATCH); 2239 goto err; 2240 } 2241 if (!sk_X509_NAME_push(ca_sk, xn)) { 2242 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); 2243 goto err; 2244 } 2245 xn = NULL; 2246 2247 p += l; 2248 nc += l + 2; 2249 } 2250 2251 if (0) { 2252 cont: 2253 ERR_clear_error(); 2254 } 2255 2256 /* we should setup a certificate to return.... */ 2257 s->s3->tmp.cert_req = 1; 2258 s->s3->tmp.ctype_num = ctype_num; 2259 if (s->s3->tmp.ca_names != NULL) 2260 sk_X509_NAME_pop_free(s->s3->tmp.ca_names, X509_NAME_free); 2261 s->s3->tmp.ca_names = ca_sk; 2262 ca_sk = NULL; 2263 2264 ret = 1; 2265 goto done; 2266 err: 2267 s->state = SSL_ST_ERR; 2268 done: 2269 X509_NAME_free(xn); 2270 if (ca_sk != NULL) 2271 sk_X509_NAME_pop_free(ca_sk, X509_NAME_free); 2272 return (ret); 2273} 2274 2275static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b) 2276{ 2277 return (X509_NAME_cmp(*a, *b)); 2278} 2279 2280#ifndef OPENSSL_NO_TLSEXT 2281int ssl3_get_new_session_ticket(SSL *s) 2282{ 2283 int ok, al, ret = 0, ticklen; 2284 long n; 2285 const unsigned char *p; 2286 unsigned char *d; 2287 unsigned long ticket_lifetime_hint; 2288 2289 n = s->method->ssl_get_message(s, 2290 SSL3_ST_CR_SESSION_TICKET_A, 2291 SSL3_ST_CR_SESSION_TICKET_B, 2292 SSL3_MT_NEWSESSION_TICKET, 16384, &ok); 2293 2294 if (!ok) 2295 return ((int)n); 2296 2297 if (n < 6) { 2298 /* need at least ticket_lifetime_hint + ticket length */ 2299 al = SSL_AD_DECODE_ERROR; 2300 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); 2301 goto f_err; 2302 } 2303 2304 p = d = (unsigned char *)s->init_msg; 2305 2306 n2l(p, ticket_lifetime_hint); 2307 n2s(p, ticklen); 2308 /* ticket_lifetime_hint + ticket_length + ticket */ 2309 if (ticklen + 6 != n) { 2310 al = SSL_AD_DECODE_ERROR; 2311 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); 2312 goto f_err; 2313 } 2314 2315 /* Server is allowed to change its mind and send an empty ticket. */ 2316 if (ticklen == 0) 2317 return 1; 2318 2319 if (s->session->session_id_length > 0) { 2320 int i = s->session_ctx->session_cache_mode; 2321 SSL_SESSION *new_sess; 2322 /* 2323 * We reused an existing session, so we need to replace it with a new 2324 * one 2325 */ 2326 if (i & SSL_SESS_CACHE_CLIENT) { 2327 /* 2328 * Remove the old session from the cache 2329 */ 2330 if (i & SSL_SESS_CACHE_NO_INTERNAL_STORE) { 2331 if (s->session_ctx->remove_session_cb != NULL) 2332 s->session_ctx->remove_session_cb(s->session_ctx, 2333 s->session); 2334 } else { 2335 /* We carry on if this fails */ 2336 SSL_CTX_remove_session(s->session_ctx, s->session); 2337 } 2338 } 2339 2340 if ((new_sess = ssl_session_dup(s->session, 0)) == 0) { 2341 al = SSL_AD_INTERNAL_ERROR; 2342 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); 2343 goto f_err; 2344 } 2345 2346 SSL_SESSION_free(s->session); 2347 s->session = new_sess; 2348 } 2349 2350 if (s->session->tlsext_tick) { 2351 OPENSSL_free(s->session->tlsext_tick); 2352 s->session->tlsext_ticklen = 0; 2353 } 2354 s->session->tlsext_tick = OPENSSL_malloc(ticklen); 2355 if (!s->session->tlsext_tick) { 2356 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); 2357 goto err; 2358 } 2359 memcpy(s->session->tlsext_tick, p, ticklen); 2360 s->session->tlsext_tick_lifetime_hint = ticket_lifetime_hint; 2361 s->session->tlsext_ticklen = ticklen; 2362 /* 2363 * There are two ways to detect a resumed ticket session. One is to set 2364 * an appropriate session ID and then the server must return a match in 2365 * ServerHello. This allows the normal client session ID matching to work 2366 * and we know much earlier that the ticket has been accepted. The 2367 * other way is to set zero length session ID when the ticket is 2368 * presented and rely on the handshake to determine session resumption. 2369 * We choose the former approach because this fits in with assumptions 2370 * elsewhere in OpenSSL. The session ID is set to the SHA256 (or SHA1 is 2371 * SHA256 is disabled) hash of the ticket. 2372 */ 2373 EVP_Digest(p, ticklen, 2374 s->session->session_id, &s->session->session_id_length, 2375# ifndef OPENSSL_NO_SHA256 2376 EVP_sha256(), NULL); 2377# else 2378 EVP_sha1(), NULL); 2379# endif 2380 ret = 1; 2381 return (ret); 2382 f_err: 2383 ssl3_send_alert(s, SSL3_AL_FATAL, al); 2384 err: 2385 s->state = SSL_ST_ERR; 2386 return (-1); 2387} 2388 2389int ssl3_get_cert_status(SSL *s) 2390{ 2391 int ok, al; 2392 unsigned long resplen, n; 2393 const unsigned char *p; 2394 2395 n = s->method->ssl_get_message(s, 2396 SSL3_ST_CR_CERT_STATUS_A, 2397 SSL3_ST_CR_CERT_STATUS_B, 2398 -1, 16384, &ok); 2399 2400 if (!ok) 2401 return ((int)n); 2402 2403 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_STATUS) { 2404 /* 2405 * The CertificateStatus message is optional even if 2406 * tlsext_status_expected is set 2407 */ 2408 s->s3->tmp.reuse_message = 1; 2409 } else { 2410 if (n < 4) { 2411 /* need at least status type + length */ 2412 al = SSL_AD_DECODE_ERROR; 2413 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, SSL_R_LENGTH_MISMATCH); 2414 goto f_err; 2415 } 2416 p = (unsigned char *)s->init_msg; 2417 if (*p++ != TLSEXT_STATUSTYPE_ocsp) { 2418 al = SSL_AD_DECODE_ERROR; 2419 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, SSL_R_UNSUPPORTED_STATUS_TYPE); 2420 goto f_err; 2421 } 2422 n2l3(p, resplen); 2423 if (resplen + 4 != n) { 2424 al = SSL_AD_DECODE_ERROR; 2425 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, SSL_R_LENGTH_MISMATCH); 2426 goto f_err; 2427 } 2428 s->tlsext_ocsp_resp = BUF_memdup(p, resplen); 2429 if (s->tlsext_ocsp_resp == NULL) { 2430 al = SSL_AD_INTERNAL_ERROR; 2431 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, ERR_R_MALLOC_FAILURE); 2432 goto f_err; 2433 } 2434 s->tlsext_ocsp_resplen = resplen; 2435 } 2436 if (s->ctx->tlsext_status_cb) { 2437 int ret; 2438 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg); 2439 if (ret == 0) { 2440 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE; 2441 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, SSL_R_INVALID_STATUS_RESPONSE); 2442 goto f_err; 2443 } 2444 if (ret < 0) { 2445 al = SSL_AD_INTERNAL_ERROR; 2446 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, ERR_R_MALLOC_FAILURE); 2447 goto f_err; 2448 } 2449 } 2450 return 1; 2451 f_err: 2452 ssl3_send_alert(s, SSL3_AL_FATAL, al); 2453 s->state = SSL_ST_ERR; 2454 return (-1); 2455} 2456#endif 2457 2458int ssl3_get_server_done(SSL *s) 2459{ 2460 int ok, ret = 0; 2461 long n; 2462 2463 /* Second to last param should be very small, like 0 :-) */ 2464 n = s->method->ssl_get_message(s, 2465 SSL3_ST_CR_SRVR_DONE_A, 2466 SSL3_ST_CR_SRVR_DONE_B, 2467 SSL3_MT_SERVER_DONE, 30, &ok); 2468 2469 if (!ok) 2470 return ((int)n); 2471 if (n > 0) { 2472 /* should contain no data */ 2473 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); 2474 SSLerr(SSL_F_SSL3_GET_SERVER_DONE, SSL_R_LENGTH_MISMATCH); 2475 s->state = SSL_ST_ERR; 2476 return -1; 2477 } 2478 ret = 1; 2479 return (ret); 2480} 2481 2482#ifndef OPENSSL_NO_DH 2483static DH *get_server_static_dh_key(SESS_CERT *scert) 2484{ 2485 DH *dh_srvr = NULL; 2486 EVP_PKEY *spkey = NULL; 2487 int idx = scert->peer_cert_type; 2488 2489 if (idx >= 0) 2490 spkey = X509_get_pubkey(scert->peer_pkeys[idx].x509); 2491 if (spkey) { 2492 dh_srvr = EVP_PKEY_get1_DH(spkey); 2493 EVP_PKEY_free(spkey); 2494 } 2495 if (dh_srvr == NULL) 2496 SSLerr(SSL_F_GET_SERVER_STATIC_DH_KEY, ERR_R_INTERNAL_ERROR); 2497 return dh_srvr; 2498} 2499#endif 2500 2501int ssl3_send_client_key_exchange(SSL *s) 2502{ 2503 unsigned char *p; 2504 int n; 2505 unsigned long alg_k; 2506#ifndef OPENSSL_NO_RSA 2507 unsigned char *q; 2508 EVP_PKEY *pkey = NULL; 2509#endif 2510#ifndef OPENSSL_NO_KRB5 2511 KSSL_ERR kssl_err; 2512#endif /* OPENSSL_NO_KRB5 */ 2513#ifndef OPENSSL_NO_ECDH 2514 EC_KEY *clnt_ecdh = NULL; 2515 const EC_POINT *srvr_ecpoint = NULL; 2516 EVP_PKEY *srvr_pub_pkey = NULL; 2517 unsigned char *encodedPoint = NULL; 2518 int encoded_pt_len = 0; 2519 BN_CTX *bn_ctx = NULL; 2520#endif 2521 2522 if (s->state == SSL3_ST_CW_KEY_EXCH_A) { 2523 p = ssl_handshake_start(s); 2524 2525 alg_k = s->s3->tmp.new_cipher->algorithm_mkey; 2526 2527 /* Fool emacs indentation */ 2528 if (0) { 2529 } 2530#ifndef OPENSSL_NO_RSA 2531 else if (alg_k & SSL_kRSA) { 2532 RSA *rsa; 2533 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; 2534 2535 if (s->session->sess_cert == NULL) { 2536 /* 2537 * We should always have a server certificate with SSL_kRSA. 2538 */ 2539 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2540 ERR_R_INTERNAL_ERROR); 2541 goto err; 2542 } 2543 2544 if (s->session->sess_cert->peer_rsa_tmp != NULL) 2545 rsa = s->session->sess_cert->peer_rsa_tmp; 2546 else { 2547 pkey = 2548 X509_get_pubkey(s->session-> 2549 sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC]. 2550 x509); 2551 if ((pkey == NULL) || (pkey->type != EVP_PKEY_RSA) 2552 || (pkey->pkey.rsa == NULL)) { 2553 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2554 ERR_R_INTERNAL_ERROR); 2555 EVP_PKEY_free(pkey); 2556 goto err; 2557 } 2558 rsa = pkey->pkey.rsa; 2559 EVP_PKEY_free(pkey); 2560 } 2561 2562 tmp_buf[0] = s->client_version >> 8; 2563 tmp_buf[1] = s->client_version & 0xff; 2564 if (RAND_bytes(&(tmp_buf[2]), sizeof tmp_buf - 2) <= 0) 2565 goto err; 2566 2567 s->session->master_key_length = sizeof tmp_buf; 2568 2569 q = p; 2570 /* Fix buf for TLS and beyond */ 2571 if (s->version > SSL3_VERSION) 2572 p += 2; 2573 n = RSA_public_encrypt(sizeof tmp_buf, 2574 tmp_buf, p, rsa, RSA_PKCS1_PADDING); 2575# ifdef PKCS1_CHECK 2576 if (s->options & SSL_OP_PKCS1_CHECK_1) 2577 p[1]++; 2578 if (s->options & SSL_OP_PKCS1_CHECK_2) 2579 tmp_buf[0] = 0x70; 2580# endif 2581 if (n <= 0) { 2582 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2583 SSL_R_BAD_RSA_ENCRYPT); 2584 goto err; 2585 } 2586 2587 /* Fix buf for TLS and beyond */ 2588 if (s->version > SSL3_VERSION) { 2589 s2n(n, q); 2590 n += 2; 2591 } 2592 2593 s->session->master_key_length = 2594 s->method->ssl3_enc->generate_master_secret(s, 2595 s-> 2596 session->master_key, 2597 tmp_buf, 2598 sizeof tmp_buf); 2599 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf); 2600 } 2601#endif 2602#ifndef OPENSSL_NO_KRB5 2603 else if (alg_k & SSL_kKRB5) { 2604 krb5_error_code krb5rc; 2605 KSSL_CTX *kssl_ctx = s->kssl_ctx; 2606 /* krb5_data krb5_ap_req; */ 2607 krb5_data *enc_ticket; 2608 krb5_data authenticator, *authp = NULL; 2609 EVP_CIPHER_CTX ciph_ctx; 2610 const EVP_CIPHER *enc = NULL; 2611 unsigned char iv[EVP_MAX_IV_LENGTH]; 2612 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; 2613 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH + EVP_MAX_IV_LENGTH]; 2614 int padl, outl = sizeof(epms); 2615 2616 EVP_CIPHER_CTX_init(&ciph_ctx); 2617 2618# ifdef KSSL_DEBUG 2619 fprintf(stderr, "ssl3_send_client_key_exchange(%lx & %lx)\n", 2620 alg_k, SSL_kKRB5); 2621# endif /* KSSL_DEBUG */ 2622 2623 authp = NULL; 2624# ifdef KRB5SENDAUTH 2625 if (KRB5SENDAUTH) 2626 authp = &authenticator; 2627# endif /* KRB5SENDAUTH */ 2628 2629 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp, &kssl_err); 2630 enc = kssl_map_enc(kssl_ctx->enctype); 2631 if (enc == NULL) 2632 goto err; 2633# ifdef KSSL_DEBUG 2634 { 2635 fprintf(stderr, "kssl_cget_tkt rtn %d\n", krb5rc); 2636 if (krb5rc && kssl_err.text) 2637 fprintf(stderr, "kssl_cget_tkt kssl_err=%s\n", 2638 kssl_err.text); 2639 } 2640# endif /* KSSL_DEBUG */ 2641 2642 if (krb5rc) { 2643 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); 2644 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, kssl_err.reason); 2645 goto err; 2646 } 2647 2648 /*- 2649 * 20010406 VRS - Earlier versions used KRB5 AP_REQ 2650 * in place of RFC 2712 KerberosWrapper, as in: 2651 * 2652 * Send ticket (copy to *p, set n = length) 2653 * n = krb5_ap_req.length; 2654 * memcpy(p, krb5_ap_req.data, krb5_ap_req.length); 2655 * if (krb5_ap_req.data) 2656 * kssl_krb5_free_data_contents(NULL,&krb5_ap_req); 2657 * 2658 * Now using real RFC 2712 KerberosWrapper 2659 * (Thanks to Simon Wilkinson <sxw@sxw.org.uk>) 2660 * Note: 2712 "opaque" types are here replaced 2661 * with a 2-byte length followed by the value. 2662 * Example: 2663 * KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms 2664 * Where "xx xx" = length bytes. Shown here with 2665 * optional authenticator omitted. 2666 */ 2667 2668 /* KerberosWrapper.Ticket */ 2669 s2n(enc_ticket->length, p); 2670 memcpy(p, enc_ticket->data, enc_ticket->length); 2671 p += enc_ticket->length; 2672 n = enc_ticket->length + 2; 2673 2674 /* KerberosWrapper.Authenticator */ 2675 if (authp && authp->length) { 2676 s2n(authp->length, p); 2677 memcpy(p, authp->data, authp->length); 2678 p += authp->length; 2679 n += authp->length + 2; 2680 2681 free(authp->data); 2682 authp->data = NULL; 2683 authp->length = 0; 2684 } else { 2685 s2n(0, p); /* null authenticator length */ 2686 n += 2; 2687 } 2688 2689 tmp_buf[0] = s->client_version >> 8; 2690 tmp_buf[1] = s->client_version & 0xff; 2691 if (RAND_bytes(&(tmp_buf[2]), sizeof tmp_buf - 2) <= 0) 2692 goto err; 2693 2694 /*- 2695 * 20010420 VRS. Tried it this way; failed. 2696 * EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL); 2697 * EVP_CIPHER_CTX_set_key_length(&ciph_ctx, 2698 * kssl_ctx->length); 2699 * EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv); 2700 */ 2701 2702 memset(iv, 0, sizeof iv); /* per RFC 1510 */ 2703 EVP_EncryptInit_ex(&ciph_ctx, enc, NULL, kssl_ctx->key, iv); 2704 EVP_EncryptUpdate(&ciph_ctx, epms, &outl, tmp_buf, 2705 sizeof tmp_buf); 2706 EVP_EncryptFinal_ex(&ciph_ctx, &(epms[outl]), &padl); 2707 outl += padl; 2708 if (outl > (int)sizeof epms) { 2709 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2710 ERR_R_INTERNAL_ERROR); 2711 goto err; 2712 } 2713 EVP_CIPHER_CTX_cleanup(&ciph_ctx); 2714 2715 /* KerberosWrapper.EncryptedPreMasterSecret */ 2716 s2n(outl, p); 2717 memcpy(p, epms, outl); 2718 p += outl; 2719 n += outl + 2; 2720 2721 s->session->master_key_length = 2722 s->method->ssl3_enc->generate_master_secret(s, 2723 s-> 2724 session->master_key, 2725 tmp_buf, 2726 sizeof tmp_buf); 2727 2728 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf); 2729 OPENSSL_cleanse(epms, outl); 2730 } 2731#endif 2732#ifndef OPENSSL_NO_DH 2733 else if (alg_k & (SSL_kEDH | SSL_kDHr | SSL_kDHd)) { 2734 DH *dh_srvr, *dh_clnt; 2735 SESS_CERT *scert = s->session->sess_cert; 2736 2737 if (scert == NULL) { 2738 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE); 2739 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2740 SSL_R_UNEXPECTED_MESSAGE); 2741 goto err; 2742 } 2743 2744 if (scert->peer_dh_tmp != NULL) { 2745 dh_srvr = scert->peer_dh_tmp; 2746 } else { 2747 dh_srvr = get_server_static_dh_key(scert); 2748 if (dh_srvr == NULL) 2749 goto err; 2750 } 2751 2752 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) { 2753 /* Use client certificate key */ 2754 EVP_PKEY *clkey = s->cert->key->privatekey; 2755 dh_clnt = NULL; 2756 if (clkey) 2757 dh_clnt = EVP_PKEY_get1_DH(clkey); 2758 if (dh_clnt == NULL) { 2759 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2760 ERR_R_INTERNAL_ERROR); 2761 goto err; 2762 } 2763 } else { 2764 /* generate a new random key */ 2765 if ((dh_clnt = DHparams_dup(dh_srvr)) == NULL) { 2766 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB); 2767 goto err; 2768 } 2769 if (!DH_generate_key(dh_clnt)) { 2770 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB); 2771 DH_free(dh_clnt); 2772 goto err; 2773 } 2774 } 2775 2776 /* 2777 * use the 'p' output buffer for the DH key, but make sure to 2778 * clear it out afterwards 2779 */ 2780 2781 n = DH_compute_key(p, dh_srvr->pub_key, dh_clnt); 2782 if (scert->peer_dh_tmp == NULL) 2783 DH_free(dh_srvr); 2784 2785 if (n <= 0) { 2786 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB); 2787 DH_free(dh_clnt); 2788 goto err; 2789 } 2790 2791 /* generate master key from the result */ 2792 s->session->master_key_length = 2793 s->method->ssl3_enc->generate_master_secret(s, 2794 s-> 2795 session->master_key, 2796 p, n); 2797 /* clean up */ 2798 memset(p, 0, n); 2799 2800 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) 2801 n = 0; 2802 else { 2803 /* send off the data */ 2804 n = BN_num_bytes(dh_clnt->pub_key); 2805 s2n(n, p); 2806 BN_bn2bin(dh_clnt->pub_key, p); 2807 n += 2; 2808 } 2809 2810 DH_free(dh_clnt); 2811 } 2812#endif 2813 2814#ifndef OPENSSL_NO_ECDH 2815 else if (alg_k & (SSL_kEECDH | SSL_kECDHr | SSL_kECDHe)) { 2816 const EC_GROUP *srvr_group = NULL; 2817 EC_KEY *tkey; 2818 int ecdh_clnt_cert = 0; 2819 int field_size = 0; 2820 2821 if (s->session->sess_cert == NULL) { 2822 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE); 2823 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2824 SSL_R_UNEXPECTED_MESSAGE); 2825 goto err; 2826 } 2827 2828 /* 2829 * Did we send out the client's ECDH share for use in premaster 2830 * computation as part of client certificate? If so, set 2831 * ecdh_clnt_cert to 1. 2832 */ 2833 if ((alg_k & (SSL_kECDHr | SSL_kECDHe)) && (s->cert != NULL)) { 2834 /*- 2835 * XXX: For now, we do not support client 2836 * authentication using ECDH certificates. 2837 * To add such support, one needs to add 2838 * code that checks for appropriate 2839 * conditions and sets ecdh_clnt_cert to 1. 2840 * For example, the cert have an ECC 2841 * key on the same curve as the server's 2842 * and the key should be authorized for 2843 * key agreement. 2844 * 2845 * One also needs to add code in ssl3_connect 2846 * to skip sending the certificate verify 2847 * message. 2848 * 2849 * if ((s->cert->key->privatekey != NULL) && 2850 * (s->cert->key->privatekey->type == 2851 * EVP_PKEY_EC) && ...) 2852 * ecdh_clnt_cert = 1; 2853 */ 2854 } 2855 2856 if (s->session->sess_cert->peer_ecdh_tmp != NULL) { 2857 tkey = s->session->sess_cert->peer_ecdh_tmp; 2858 } else { 2859 /* Get the Server Public Key from Cert */ 2860 srvr_pub_pkey = 2861 X509_get_pubkey(s->session-> 2862 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509); 2863 if ((srvr_pub_pkey == NULL) 2864 || (srvr_pub_pkey->type != EVP_PKEY_EC) 2865 || (srvr_pub_pkey->pkey.ec == NULL)) { 2866 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2867 ERR_R_INTERNAL_ERROR); 2868 goto err; 2869 } 2870 2871 tkey = srvr_pub_pkey->pkey.ec; 2872 } 2873 2874 srvr_group = EC_KEY_get0_group(tkey); 2875 srvr_ecpoint = EC_KEY_get0_public_key(tkey); 2876 2877 if ((srvr_group == NULL) || (srvr_ecpoint == NULL)) { 2878 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2879 ERR_R_INTERNAL_ERROR); 2880 goto err; 2881 } 2882 2883 if ((clnt_ecdh = EC_KEY_new()) == NULL) { 2884 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2885 ERR_R_MALLOC_FAILURE); 2886 goto err; 2887 } 2888 2889 if (!EC_KEY_set_group(clnt_ecdh, srvr_group)) { 2890 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB); 2891 goto err; 2892 } 2893 if (ecdh_clnt_cert) { 2894 /* 2895 * Reuse key info from our certificate We only need our 2896 * private key to perform the ECDH computation. 2897 */ 2898 const BIGNUM *priv_key; 2899 tkey = s->cert->key->privatekey->pkey.ec; 2900 priv_key = EC_KEY_get0_private_key(tkey); 2901 if (priv_key == NULL) { 2902 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2903 ERR_R_MALLOC_FAILURE); 2904 goto err; 2905 } 2906 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key)) { 2907 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB); 2908 goto err; 2909 } 2910 } else { 2911 /* Generate a new ECDH key pair */ 2912 if (!(EC_KEY_generate_key(clnt_ecdh))) { 2913 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2914 ERR_R_ECDH_LIB); 2915 goto err; 2916 } 2917 } 2918 2919 /* 2920 * use the 'p' output buffer for the ECDH key, but make sure to 2921 * clear it out afterwards 2922 */ 2923 2924 field_size = EC_GROUP_get_degree(srvr_group); 2925 if (field_size <= 0) { 2926 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB); 2927 goto err; 2928 } 2929 n = ECDH_compute_key(p, (field_size + 7) / 8, srvr_ecpoint, 2930 clnt_ecdh, NULL); 2931 if (n <= 0) { 2932 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB); 2933 goto err; 2934 } 2935 2936 /* generate master key from the result */ 2937 s->session->master_key_length = 2938 s->method->ssl3_enc->generate_master_secret(s, 2939 s-> 2940 session->master_key, 2941 p, n); 2942 2943 memset(p, 0, n); /* clean up */ 2944 2945 if (ecdh_clnt_cert) { 2946 /* Send empty client key exch message */ 2947 n = 0; 2948 } else { 2949 /* 2950 * First check the size of encoding and allocate memory 2951 * accordingly. 2952 */ 2953 encoded_pt_len = 2954 EC_POINT_point2oct(srvr_group, 2955 EC_KEY_get0_public_key(clnt_ecdh), 2956 POINT_CONVERSION_UNCOMPRESSED, 2957 NULL, 0, NULL); 2958 2959 encodedPoint = (unsigned char *) 2960 OPENSSL_malloc(encoded_pt_len * sizeof(unsigned char)); 2961 bn_ctx = BN_CTX_new(); 2962 if ((encodedPoint == NULL) || (bn_ctx == NULL)) { 2963 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2964 ERR_R_MALLOC_FAILURE); 2965 goto err; 2966 } 2967 2968 /* Encode the public key */ 2969 n = EC_POINT_point2oct(srvr_group, 2970 EC_KEY_get0_public_key(clnt_ecdh), 2971 POINT_CONVERSION_UNCOMPRESSED, 2972 encodedPoint, encoded_pt_len, bn_ctx); 2973 2974 *p = n; /* length of encoded point */ 2975 /* Encoded point will be copied here */ 2976 p += 1; 2977 /* copy the point */ 2978 memcpy((unsigned char *)p, encodedPoint, n); 2979 /* increment n to account for length field */ 2980 n += 1; 2981 } 2982 2983 /* Free allocated memory */ 2984 BN_CTX_free(bn_ctx); 2985 if (encodedPoint != NULL) 2986 OPENSSL_free(encodedPoint); 2987 if (clnt_ecdh != NULL) 2988 EC_KEY_free(clnt_ecdh); 2989 EVP_PKEY_free(srvr_pub_pkey); 2990 } 2991#endif /* !OPENSSL_NO_ECDH */ 2992 else if (alg_k & SSL_kGOST) { 2993 /* GOST key exchange message creation */ 2994 EVP_PKEY_CTX *pkey_ctx; 2995 X509 *peer_cert; 2996 size_t msglen; 2997 unsigned int md_len; 2998 int keytype; 2999 unsigned char premaster_secret[32], shared_ukm[32], tmp[256]; 3000 EVP_MD_CTX *ukm_hash; 3001 EVP_PKEY *pub_key; 3002 3003 /* 3004 * Get server sertificate PKEY and create ctx from it 3005 */ 3006 peer_cert = 3007 s->session-> 3008 sess_cert->peer_pkeys[(keytype = SSL_PKEY_GOST01)].x509; 3009 if (!peer_cert) 3010 peer_cert = 3011 s->session-> 3012 sess_cert->peer_pkeys[(keytype = SSL_PKEY_GOST94)].x509; 3013 if (!peer_cert) { 3014 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 3015 SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER); 3016 goto err; 3017 } 3018 3019 pkey_ctx = EVP_PKEY_CTX_new(pub_key = 3020 X509_get_pubkey(peer_cert), NULL); 3021 if (pkey_ctx == NULL) { 3022 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 3023 ERR_R_MALLOC_FAILURE); 3024 goto err; 3025 } 3026 /* 3027 * If we have send a certificate, and certificate key 3028 * 3029 * * parameters match those of server certificate, use 3030 * certificate key for key exchange 3031 */ 3032 3033 /* Otherwise, generate ephemeral key pair */ 3034 3035 if (pkey_ctx == NULL 3036 || EVP_PKEY_encrypt_init(pkey_ctx) <= 0 3037 /* Generate session key */ 3038 || RAND_bytes(premaster_secret, 32) <= 0) { 3039 EVP_PKEY_CTX_free(pkey_ctx); 3040 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 3041 ERR_R_INTERNAL_ERROR); 3042 goto err; 3043 } 3044 /* 3045 * Compute shared IV and store it in algorithm-specific context 3046 * data 3047 */ 3048 ukm_hash = EVP_MD_CTX_create(); 3049 if (EVP_DigestInit(ukm_hash, 3050 EVP_get_digestbynid(NID_id_GostR3411_94)) <= 0 3051 || EVP_DigestUpdate(ukm_hash, s->s3->client_random, 3052 SSL3_RANDOM_SIZE) <= 0 3053 || EVP_DigestUpdate(ukm_hash, s->s3->server_random, 3054 SSL3_RANDOM_SIZE) <= 0 3055 || EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len) <= 0) { 3056 EVP_MD_CTX_destroy(ukm_hash); 3057 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 3058 ERR_R_INTERNAL_ERROR); 3059 goto err; 3060 } 3061 EVP_MD_CTX_destroy(ukm_hash); 3062 if (EVP_PKEY_CTX_ctrl 3063 (pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, EVP_PKEY_CTRL_SET_IV, 8, 3064 shared_ukm) < 0) { 3065 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 3066 SSL_R_LIBRARY_BUG); 3067 goto err; 3068 } 3069 /* Make GOST keytransport blob message */ 3070 /* 3071 * Encapsulate it into sequence 3072 */ 3073 *(p++) = V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED; 3074 msglen = 255; 3075 if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, premaster_secret, 32) 3076 <= 0) { 3077 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 3078 SSL_R_LIBRARY_BUG); 3079 goto err; 3080 } 3081 if (msglen >= 0x80) { 3082 *(p++) = 0x81; 3083 *(p++) = msglen & 0xff; 3084 n = msglen + 3; 3085 } else { 3086 *(p++) = msglen & 0xff; 3087 n = msglen + 2; 3088 } 3089 memcpy(p, tmp, msglen); 3090 EVP_PKEY_CTX_free(pkey_ctx); 3091 s->session->master_key_length = 3092 s->method->ssl3_enc->generate_master_secret(s, 3093 s-> 3094 session->master_key, 3095 premaster_secret, 3096 32); 3097 EVP_PKEY_free(pub_key); 3098 3099 } 3100#ifndef OPENSSL_NO_SRP 3101 else if (alg_k & SSL_kSRP) { 3102 if (s->srp_ctx.A != NULL) { 3103 /* send off the data */ 3104 n = BN_num_bytes(s->srp_ctx.A); 3105 s2n(n, p); 3106 BN_bn2bin(s->srp_ctx.A, p); 3107 n += 2; 3108 } else { 3109 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 3110 ERR_R_INTERNAL_ERROR); 3111 goto err; 3112 } 3113 if (s->session->srp_username != NULL) 3114 OPENSSL_free(s->session->srp_username); 3115 s->session->srp_username = BUF_strdup(s->srp_ctx.login); 3116 if (s->session->srp_username == NULL) { 3117 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 3118 ERR_R_MALLOC_FAILURE); 3119 goto err; 3120 } 3121 3122 if ((s->session->master_key_length = 3123 SRP_generate_client_master_secret(s, 3124 s->session->master_key)) < 3125 0) { 3126 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 3127 ERR_R_INTERNAL_ERROR); 3128 goto err; 3129 } 3130 } 3131#endif 3132#ifndef OPENSSL_NO_PSK 3133 else if (alg_k & SSL_kPSK) { 3134 /* 3135 * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a 3136 * \0-terminated identity. The last byte is for us for simulating 3137 * strnlen. 3138 */ 3139 char identity[PSK_MAX_IDENTITY_LEN + 2]; 3140 size_t identity_len; 3141 unsigned char *t = NULL; 3142 unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN * 2 + 4]; 3143 unsigned int pre_ms_len = 0, psk_len = 0; 3144 int psk_err = 1; 3145 3146 n = 0; 3147 if (s->psk_client_callback == NULL) { 3148 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 3149 SSL_R_PSK_NO_CLIENT_CB); 3150 goto err; 3151 } 3152 3153 memset(identity, 0, sizeof(identity)); 3154 psk_len = s->psk_client_callback(s, s->session->psk_identity_hint, 3155 identity, sizeof(identity) - 1, 3156 psk_or_pre_ms, 3157 sizeof(psk_or_pre_ms)); 3158 if (psk_len > PSK_MAX_PSK_LEN) { 3159 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 3160 ERR_R_INTERNAL_ERROR); 3161 goto psk_err; 3162 } else if (psk_len == 0) { 3163 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 3164 SSL_R_PSK_IDENTITY_NOT_FOUND); 3165 goto psk_err; 3166 } 3167 identity[PSK_MAX_IDENTITY_LEN + 1] = '\0'; 3168 identity_len = strlen(identity); 3169 if (identity_len > PSK_MAX_IDENTITY_LEN) { 3170 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 3171 ERR_R_INTERNAL_ERROR); 3172 goto psk_err; 3173 } 3174 /* create PSK pre_master_secret */ 3175 pre_ms_len = 2 + psk_len + 2 + psk_len; 3176 t = psk_or_pre_ms; 3177 memmove(psk_or_pre_ms + psk_len + 4, psk_or_pre_ms, psk_len); 3178 s2n(psk_len, t); 3179 memset(t, 0, psk_len); 3180 t += psk_len; 3181 s2n(psk_len, t); 3182 3183 if (s->session->psk_identity_hint != NULL) 3184 OPENSSL_free(s->session->psk_identity_hint); 3185 s->session->psk_identity_hint = 3186 BUF_strdup(s->ctx->psk_identity_hint); 3187 if (s->ctx->psk_identity_hint != NULL 3188 && s->session->psk_identity_hint == NULL) { 3189 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 3190 ERR_R_MALLOC_FAILURE); 3191 goto psk_err; 3192 } 3193 3194 if (s->session->psk_identity != NULL) 3195 OPENSSL_free(s->session->psk_identity); 3196 s->session->psk_identity = BUF_strdup(identity); 3197 if (s->session->psk_identity == NULL) { 3198 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 3199 ERR_R_MALLOC_FAILURE); 3200 goto psk_err; 3201 } 3202 3203 s->session->master_key_length = 3204 s->method->ssl3_enc->generate_master_secret(s, 3205 s-> 3206 session->master_key, 3207 psk_or_pre_ms, 3208 pre_ms_len); 3209 s2n(identity_len, p); 3210 memcpy(p, identity, identity_len); 3211 n = 2 + identity_len; 3212 psk_err = 0; 3213 psk_err: 3214 OPENSSL_cleanse(identity, sizeof(identity)); 3215 OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms)); 3216 if (psk_err != 0) { 3217 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); 3218 goto err; 3219 } 3220 } 3221#endif 3222 else { 3223 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); 3224 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); 3225 goto err; 3226 } 3227 3228 ssl_set_handshake_header(s, SSL3_MT_CLIENT_KEY_EXCHANGE, n); 3229 s->state = SSL3_ST_CW_KEY_EXCH_B; 3230 } 3231 3232 /* SSL3_ST_CW_KEY_EXCH_B */ 3233 return ssl_do_write(s); 3234 err: 3235#ifndef OPENSSL_NO_ECDH 3236 BN_CTX_free(bn_ctx); 3237 if (encodedPoint != NULL) 3238 OPENSSL_free(encodedPoint); 3239 if (clnt_ecdh != NULL) 3240 EC_KEY_free(clnt_ecdh); 3241 EVP_PKEY_free(srvr_pub_pkey); 3242#endif 3243 s->state = SSL_ST_ERR; 3244 return (-1); 3245} 3246 3247int ssl3_send_client_verify(SSL *s) 3248{ 3249 unsigned char *p; 3250 unsigned char data[MD5_DIGEST_LENGTH + SHA_DIGEST_LENGTH]; 3251 EVP_PKEY *pkey; 3252 EVP_PKEY_CTX *pctx = NULL; 3253 EVP_MD_CTX mctx; 3254 unsigned u = 0; 3255 unsigned long n; 3256 int j; 3257 3258 EVP_MD_CTX_init(&mctx); 3259 3260 if (s->state == SSL3_ST_CW_CERT_VRFY_A) { 3261 p = ssl_handshake_start(s); 3262 pkey = s->cert->key->privatekey; 3263/* Create context from key and test if sha1 is allowed as digest */ 3264 pctx = EVP_PKEY_CTX_new(pkey, NULL); 3265 if (pctx == NULL || EVP_PKEY_sign_init(pctx) <= 0) { 3266 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR); 3267 goto err; 3268 } 3269 if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1()) > 0) { 3270 if (!SSL_USE_SIGALGS(s)) 3271 s->method->ssl3_enc->cert_verify_mac(s, 3272 NID_sha1, 3273 &(data 3274 [MD5_DIGEST_LENGTH])); 3275 } else { 3276 ERR_clear_error(); 3277 } 3278 /* 3279 * For TLS v1.2 send signature algorithm and signature using agreed 3280 * digest and cached handshake records. 3281 */ 3282 if (SSL_USE_SIGALGS(s)) { 3283 long hdatalen = 0; 3284 void *hdata; 3285 const EVP_MD *md = s->cert->key->digest; 3286 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, &hdata); 3287 if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md)) { 3288 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR); 3289 goto err; 3290 } 3291 p += 2; 3292#ifdef SSL_DEBUG 3293 fprintf(stderr, "Using TLS 1.2 with client alg %s\n", 3294 EVP_MD_name(md)); 3295#endif 3296 if (!EVP_SignInit_ex(&mctx, md, NULL) 3297 || !EVP_SignUpdate(&mctx, hdata, hdatalen) 3298 || !EVP_SignFinal(&mctx, p + 2, &u, pkey)) { 3299 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_EVP_LIB); 3300 goto err; 3301 } 3302 s2n(u, p); 3303 n = u + 4; 3304 if (!ssl3_digest_cached_records(s)) 3305 goto err; 3306 } else 3307#ifndef OPENSSL_NO_RSA 3308 if (pkey->type == EVP_PKEY_RSA) { 3309 s->method->ssl3_enc->cert_verify_mac(s, NID_md5, &(data[0])); 3310 if (RSA_sign(NID_md5_sha1, data, 3311 MD5_DIGEST_LENGTH + SHA_DIGEST_LENGTH, 3312 &(p[2]), &u, pkey->pkey.rsa) <= 0) { 3313 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_RSA_LIB); 3314 goto err; 3315 } 3316 s2n(u, p); 3317 n = u + 2; 3318 } else 3319#endif 3320#ifndef OPENSSL_NO_DSA 3321 if (pkey->type == EVP_PKEY_DSA) { 3322 if (!DSA_sign(pkey->save_type, 3323 &(data[MD5_DIGEST_LENGTH]), 3324 SHA_DIGEST_LENGTH, &(p[2]), 3325 (unsigned int *)&j, pkey->pkey.dsa)) { 3326 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_DSA_LIB); 3327 goto err; 3328 } 3329 s2n(j, p); 3330 n = j + 2; 3331 } else 3332#endif 3333#ifndef OPENSSL_NO_ECDSA 3334 if (pkey->type == EVP_PKEY_EC) { 3335 if (!ECDSA_sign(pkey->save_type, 3336 &(data[MD5_DIGEST_LENGTH]), 3337 SHA_DIGEST_LENGTH, &(p[2]), 3338 (unsigned int *)&j, pkey->pkey.ec)) { 3339 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_ECDSA_LIB); 3340 goto err; 3341 } 3342 s2n(j, p); 3343 n = j + 2; 3344 } else 3345#endif 3346 if (pkey->type == NID_id_GostR3410_94 3347 || pkey->type == NID_id_GostR3410_2001) { 3348 unsigned char signbuf[64]; 3349 int i; 3350 size_t sigsize = 64; 3351 s->method->ssl3_enc->cert_verify_mac(s, 3352 NID_id_GostR3411_94, data); 3353 if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) { 3354 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR); 3355 goto err; 3356 } 3357 for (i = 63, j = 0; i >= 0; j++, i--) { 3358 p[2 + j] = signbuf[i]; 3359 } 3360 s2n(j, p); 3361 n = j + 2; 3362 } else { 3363 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR); 3364 goto err; 3365 } 3366 ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE_VERIFY, n); 3367 s->state = SSL3_ST_CW_CERT_VRFY_B; 3368 } 3369 EVP_MD_CTX_cleanup(&mctx); 3370 EVP_PKEY_CTX_free(pctx); 3371 return ssl_do_write(s); 3372 err: 3373 EVP_MD_CTX_cleanup(&mctx); 3374 EVP_PKEY_CTX_free(pctx); 3375 s->state = SSL_ST_ERR; 3376 return (-1); 3377} 3378 3379/* 3380 * Check a certificate can be used for client authentication. Currently check 3381 * cert exists, if we have a suitable digest for TLS 1.2 if static DH client 3382 * certificates can be used and optionally checks suitability for Suite B. 3383 */ 3384static int ssl3_check_client_certificate(SSL *s) 3385{ 3386 unsigned long alg_k; 3387 if (!s->cert || !s->cert->key->x509 || !s->cert->key->privatekey) 3388 return 0; 3389 /* If no suitable signature algorithm can't use certificate */ 3390 if (SSL_USE_SIGALGS(s) && !s->cert->key->digest) 3391 return 0; 3392 /* 3393 * If strict mode check suitability of chain before using it. This also 3394 * adjusts suite B digest if necessary. 3395 */ 3396 if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT && 3397 !tls1_check_chain(s, NULL, NULL, NULL, -2)) 3398 return 0; 3399 alg_k = s->s3->tmp.new_cipher->algorithm_mkey; 3400 /* See if we can use client certificate for fixed DH */ 3401 if (alg_k & (SSL_kDHr | SSL_kDHd)) { 3402 SESS_CERT *scert = s->session->sess_cert; 3403 int i = scert->peer_cert_type; 3404 EVP_PKEY *clkey = NULL, *spkey = NULL; 3405 clkey = s->cert->key->privatekey; 3406 /* If client key not DH assume it can be used */ 3407 if (EVP_PKEY_id(clkey) != EVP_PKEY_DH) 3408 return 1; 3409 if (i >= 0) 3410 spkey = X509_get_pubkey(scert->peer_pkeys[i].x509); 3411 if (spkey) { 3412 /* Compare server and client parameters */ 3413 i = EVP_PKEY_cmp_parameters(clkey, spkey); 3414 EVP_PKEY_free(spkey); 3415 if (i != 1) 3416 return 0; 3417 } 3418 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY; 3419 } 3420 return 1; 3421} 3422 3423int ssl3_send_client_certificate(SSL *s) 3424{ 3425 X509 *x509 = NULL; 3426 EVP_PKEY *pkey = NULL; 3427 int i; 3428 3429 if (s->state == SSL3_ST_CW_CERT_A) { 3430 /* Let cert callback update client certificates if required */ 3431 if (s->cert->cert_cb) { 3432 i = s->cert->cert_cb(s, s->cert->cert_cb_arg); 3433 if (i < 0) { 3434 s->rwstate = SSL_X509_LOOKUP; 3435 return -1; 3436 } 3437 if (i == 0) { 3438 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); 3439 s->state = SSL_ST_ERR; 3440 return 0; 3441 } 3442 s->rwstate = SSL_NOTHING; 3443 } 3444 if (ssl3_check_client_certificate(s)) 3445 s->state = SSL3_ST_CW_CERT_C; 3446 else 3447 s->state = SSL3_ST_CW_CERT_B; 3448 } 3449 3450 /* We need to get a client cert */ 3451 if (s->state == SSL3_ST_CW_CERT_B) { 3452 /* 3453 * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP; 3454 * return(-1); We then get retied later 3455 */ 3456 i = ssl_do_client_cert_cb(s, &x509, &pkey); 3457 if (i < 0) { 3458 s->rwstate = SSL_X509_LOOKUP; 3459 return (-1); 3460 } 3461 s->rwstate = SSL_NOTHING; 3462 if ((i == 1) && (pkey != NULL) && (x509 != NULL)) { 3463 s->state = SSL3_ST_CW_CERT_B; 3464 if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey)) 3465 i = 0; 3466 } else if (i == 1) { 3467 i = 0; 3468 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE, 3469 SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); 3470 } 3471 3472 if (x509 != NULL) 3473 X509_free(x509); 3474 if (pkey != NULL) 3475 EVP_PKEY_free(pkey); 3476 if (i && !ssl3_check_client_certificate(s)) 3477 i = 0; 3478 if (i == 0) { 3479 if (s->version == SSL3_VERSION) { 3480 s->s3->tmp.cert_req = 0; 3481 ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE); 3482 return (1); 3483 } else { 3484 s->s3->tmp.cert_req = 2; 3485 } 3486 } 3487 3488 /* Ok, we have a cert */ 3489 s->state = SSL3_ST_CW_CERT_C; 3490 } 3491 3492 if (s->state == SSL3_ST_CW_CERT_C) { 3493 s->state = SSL3_ST_CW_CERT_D; 3494 if (!ssl3_output_cert_chain(s, 3495 (s->s3->tmp.cert_req == 3496 2) ? NULL : s->cert->key)) { 3497 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR); 3498 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); 3499 s->state = SSL_ST_ERR; 3500 return 0; 3501 } 3502 } 3503 /* SSL3_ST_CW_CERT_D */ 3504 return ssl_do_write(s); 3505} 3506 3507#define has_bits(i,m) (((i)&(m)) == (m)) 3508 3509int ssl3_check_cert_and_algorithm(SSL *s) 3510{ 3511 int i, idx; 3512 long alg_k, alg_a; 3513 EVP_PKEY *pkey = NULL; 3514 int pkey_bits; 3515 SESS_CERT *sc; 3516#ifndef OPENSSL_NO_RSA 3517 RSA *rsa; 3518#endif 3519#ifndef OPENSSL_NO_DH 3520 DH *dh; 3521#endif 3522 int al = SSL_AD_HANDSHAKE_FAILURE; 3523 3524 alg_k = s->s3->tmp.new_cipher->algorithm_mkey; 3525 alg_a = s->s3->tmp.new_cipher->algorithm_auth; 3526 3527 /* we don't have a certificate */ 3528 if ((alg_a & (SSL_aNULL | SSL_aKRB5)) || (alg_k & SSL_kPSK)) 3529 return (1); 3530 3531 sc = s->session->sess_cert; 3532 if (sc == NULL) { 3533 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR); 3534 goto err; 3535 } 3536#ifndef OPENSSL_NO_RSA 3537 rsa = s->session->sess_cert->peer_rsa_tmp; 3538#endif 3539#ifndef OPENSSL_NO_DH 3540 dh = s->session->sess_cert->peer_dh_tmp; 3541#endif 3542 3543 /* This is the passed certificate */ 3544 3545 idx = sc->peer_cert_type; 3546#ifndef OPENSSL_NO_ECDH 3547 if (idx == SSL_PKEY_ECC) { 3548 if (ssl_check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509, s) == 0) { 3549 /* check failed */ 3550 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_BAD_ECC_CERT); 3551 goto f_err; 3552 } else { 3553 return 1; 3554 } 3555 } else if (alg_a & SSL_aECDSA) { 3556 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, 3557 SSL_R_MISSING_ECDSA_SIGNING_CERT); 3558 goto f_err; 3559 } else if (alg_k & (SSL_kECDHr | SSL_kECDHe)) { 3560 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_MISSING_ECDH_CERT); 3561 goto f_err; 3562 } 3563#endif 3564 pkey = X509_get_pubkey(sc->peer_pkeys[idx].x509); 3565 pkey_bits = EVP_PKEY_bits(pkey); 3566 i = X509_certificate_type(sc->peer_pkeys[idx].x509, pkey); 3567 EVP_PKEY_free(pkey); 3568 3569 /* Check that we have a certificate if we require one */ 3570 if ((alg_a & SSL_aRSA) && !has_bits(i, EVP_PK_RSA | EVP_PKT_SIGN)) { 3571 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, 3572 SSL_R_MISSING_RSA_SIGNING_CERT); 3573 goto f_err; 3574 } 3575#ifndef OPENSSL_NO_DSA 3576 else if ((alg_a & SSL_aDSS) && !has_bits(i, EVP_PK_DSA | EVP_PKT_SIGN)) { 3577 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, 3578 SSL_R_MISSING_DSA_SIGNING_CERT); 3579 goto f_err; 3580 } 3581#endif 3582#ifndef OPENSSL_NO_RSA 3583 if (alg_k & SSL_kRSA) { 3584 if (!SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && 3585 !has_bits(i, EVP_PK_RSA | EVP_PKT_ENC)) { 3586 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, 3587 SSL_R_MISSING_RSA_ENCRYPTING_CERT); 3588 goto f_err; 3589 } else if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)) { 3590 if (pkey_bits <= SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) { 3591 if (!has_bits(i, EVP_PK_RSA | EVP_PKT_ENC)) { 3592 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, 3593 SSL_R_MISSING_RSA_ENCRYPTING_CERT); 3594 goto f_err; 3595 } 3596 if (rsa != NULL) { 3597 /* server key exchange is not allowed. */ 3598 al = SSL_AD_INTERNAL_ERROR; 3599 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR); 3600 goto f_err; 3601 } 3602 } 3603 } 3604 } 3605#endif 3606#ifndef OPENSSL_NO_DH 3607 if ((alg_k & SSL_kEDH) && dh == NULL) { 3608 al = SSL_AD_INTERNAL_ERROR; 3609 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR); 3610 goto f_err; 3611 } 3612 if ((alg_k & SSL_kDHr) && !SSL_USE_SIGALGS(s) && 3613 !has_bits(i, EVP_PK_DH | EVP_PKS_RSA)) { 3614 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, 3615 SSL_R_MISSING_DH_RSA_CERT); 3616 goto f_err; 3617 } 3618# ifndef OPENSSL_NO_DSA 3619 if ((alg_k & SSL_kDHd) && !SSL_USE_SIGALGS(s) && 3620 !has_bits(i, EVP_PK_DH | EVP_PKS_DSA)) { 3621 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, 3622 SSL_R_MISSING_DH_DSA_CERT); 3623 goto f_err; 3624 } 3625# endif 3626 3627 if (alg_k & (SSL_kDHE | SSL_kDHr | SSL_kDHd)) { 3628 int dh_size; 3629 if (alg_k & SSL_kDHE) { 3630 dh_size = BN_num_bits(dh->p); 3631 } else { 3632 DH *dh_srvr = get_server_static_dh_key(sc); 3633 if (dh_srvr == NULL) 3634 goto f_err; 3635 dh_size = BN_num_bits(dh_srvr->p); 3636 DH_free(dh_srvr); 3637 } 3638 3639 if ((!SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && dh_size < 1024) 3640 || (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && dh_size < 512)) { 3641 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_DH_KEY_TOO_SMALL); 3642 goto f_err; 3643 } 3644 } 3645#endif /* !OPENSSL_NO_DH */ 3646 3647 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && 3648 pkey_bits > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) { 3649#ifndef OPENSSL_NO_RSA 3650 if (alg_k & SSL_kRSA) { 3651 if (rsa == NULL) { 3652 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, 3653 SSL_R_MISSING_EXPORT_TMP_RSA_KEY); 3654 goto f_err; 3655 } else if (BN_num_bits(rsa->n) > 3656 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) { 3657 /* We have a temporary RSA key but it's too large. */ 3658 al = SSL_AD_EXPORT_RESTRICTION; 3659 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, 3660 SSL_R_MISSING_EXPORT_TMP_RSA_KEY); 3661 goto f_err; 3662 } 3663 } else 3664#endif 3665#ifndef OPENSSL_NO_DH 3666 if (alg_k & SSL_kDHE) { 3667 if (BN_num_bits(dh->p) > 3668 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) { 3669 /* We have a temporary DH key but it's too large. */ 3670 al = SSL_AD_EXPORT_RESTRICTION; 3671 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, 3672 SSL_R_MISSING_EXPORT_TMP_DH_KEY); 3673 goto f_err; 3674 } 3675 } else if (alg_k & (SSL_kDHr | SSL_kDHd)) { 3676 /* The cert should have had an export DH key. */ 3677 al = SSL_AD_EXPORT_RESTRICTION; 3678 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, 3679 SSL_R_MISSING_EXPORT_TMP_DH_KEY); 3680 goto f_err; 3681 } else 3682#endif 3683 { 3684 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, 3685 SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE); 3686 goto f_err; 3687 } 3688 } 3689 return (1); 3690 f_err: 3691 ssl3_send_alert(s, SSL3_AL_FATAL, al); 3692 err: 3693 return (0); 3694} 3695 3696#ifndef OPENSSL_NO_TLSEXT 3697/* 3698 * Normally, we can tell if the server is resuming the session from 3699 * the session ID. EAP-FAST (RFC 4851), however, relies on the next server 3700 * message after the ServerHello to determine if the server is resuming. 3701 * Therefore, we allow EAP-FAST to peek ahead. 3702 * ssl3_check_finished returns 1 if we are resuming from an external 3703 * pre-shared secret, we have a "ticket" and the next server handshake message 3704 * is Finished; and 0 otherwise. It returns -1 upon an error. 3705 */ 3706static int ssl3_check_finished(SSL *s) 3707{ 3708 int ok = 0; 3709 3710 if (s->version < TLS1_VERSION || !s->tls_session_secret_cb || 3711 !s->session->tlsext_tick) 3712 return 0; 3713 3714 /* Need to permit this temporarily, in case the next message is Finished. */ 3715 s->s3->flags |= SSL3_FLAGS_CCS_OK; 3716 /* 3717 * This function is called when we might get a Certificate message instead, 3718 * so permit appropriate message length. 3719 * We ignore the return value as we're only interested in the message type 3720 * and not its length. 3721 */ 3722 s->method->ssl_get_message(s, 3723 SSL3_ST_CR_CERT_A, 3724 SSL3_ST_CR_CERT_B, 3725 -1, s->max_cert_list, &ok); 3726 s->s3->flags &= ~SSL3_FLAGS_CCS_OK; 3727 3728 if (!ok) 3729 return -1; 3730 3731 s->s3->tmp.reuse_message = 1; 3732 3733 if (s->s3->tmp.message_type == SSL3_MT_FINISHED) 3734 return 1; 3735 3736 /* If we're not done, then the CCS arrived early and we should bail. */ 3737 if (s->s3->change_cipher_spec) { 3738 SSLerr(SSL_F_SSL3_CHECK_FINISHED, SSL_R_CCS_RECEIVED_EARLY); 3739 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE); 3740 return -1; 3741 } 3742 3743 return 0; 3744} 3745 3746# ifndef OPENSSL_NO_NEXTPROTONEG 3747int ssl3_send_next_proto(SSL *s) 3748{ 3749 unsigned int len, padding_len; 3750 unsigned char *d; 3751 3752 if (s->state == SSL3_ST_CW_NEXT_PROTO_A) { 3753 len = s->next_proto_negotiated_len; 3754 padding_len = 32 - ((len + 2) % 32); 3755 d = (unsigned char *)s->init_buf->data; 3756 d[4] = len; 3757 memcpy(d + 5, s->next_proto_negotiated, len); 3758 d[5 + len] = padding_len; 3759 memset(d + 6 + len, 0, padding_len); 3760 *(d++) = SSL3_MT_NEXT_PROTO; 3761 l2n3(2 + len + padding_len, d); 3762 s->state = SSL3_ST_CW_NEXT_PROTO_B; 3763 s->init_num = 4 + 2 + len + padding_len; 3764 s->init_off = 0; 3765 } 3766 3767 return ssl3_do_write(s, SSL3_RT_HANDSHAKE); 3768} 3769#endif /* !OPENSSL_NO_NEXTPROTONEG */ 3770#endif /* !OPENSSL_NO_TLSEXT */ 3771 3772int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey) 3773{ 3774 int i = 0; 3775#ifndef OPENSSL_NO_ENGINE 3776 if (s->ctx->client_cert_engine) { 3777 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s, 3778 SSL_get_client_CA_list(s), 3779 px509, ppkey, NULL, NULL, NULL); 3780 if (i != 0) 3781 return i; 3782 } 3783#endif 3784 if (s->ctx->client_cert_cb) 3785 i = s->ctx->client_cert_cb(s, px509, ppkey); 3786 return i; 3787} 3788