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#ifndef OPENSSL_NO_DH 160#include <openssl/dh.h> 161#endif 162#include <openssl/bn.h> 163#ifndef OPENSSL_NO_ENGINE 164#include <openssl/engine.h> 165#endif 166 167static const SSL_METHOD *ssl3_get_client_method(int ver); 168static int ca_dn_cmp(const X509_NAME * const *a,const X509_NAME * const *b); 169 170static const SSL_METHOD *ssl3_get_client_method(int ver) 171 { 172 if (ver == SSL3_VERSION) 173 return(SSLv3_client_method()); 174 else 175 return(NULL); 176 } 177 178IMPLEMENT_ssl3_meth_func(SSLv3_client_method, 179 ssl_undefined_function, 180 ssl3_connect, 181 ssl3_get_client_method) 182 183int ssl3_connect(SSL *s) 184 { 185 BUF_MEM *buf=NULL; 186 unsigned long Time=(unsigned long)time(NULL); 187 void (*cb)(const SSL *ssl,int type,int val)=NULL; 188 int ret= -1; 189 int new_state,state,skip=0; 190 191 RAND_add(&Time,sizeof(Time),0); 192 ERR_clear_error(); 193 clear_sys_error(); 194 195 if (s->info_callback != NULL) 196 cb=s->info_callback; 197 else if (s->ctx->info_callback != NULL) 198 cb=s->ctx->info_callback; 199 200 s->in_handshake++; 201 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); 202 203 for (;;) 204 { 205 state=s->state; 206 207 switch(s->state) 208 { 209 case SSL_ST_RENEGOTIATE: 210 s->new_session=1; 211 s->state=SSL_ST_CONNECT; 212 s->ctx->stats.sess_connect_renegotiate++; 213 /* break */ 214 case SSL_ST_BEFORE: 215 case SSL_ST_CONNECT: 216 case SSL_ST_BEFORE|SSL_ST_CONNECT: 217 case SSL_ST_OK|SSL_ST_CONNECT: 218 219 s->server=0; 220 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1); 221 222 if ((s->version & 0xff00 ) != 0x0300) 223 { 224 SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR); 225 ret = -1; 226 goto end; 227 } 228 229 /* s->version=SSL3_VERSION; */ 230 s->type=SSL_ST_CONNECT; 231 232 if (s->init_buf == NULL) 233 { 234 if ((buf=BUF_MEM_new()) == NULL) 235 { 236 ret= -1; 237 goto end; 238 } 239 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH)) 240 { 241 ret= -1; 242 goto end; 243 } 244 s->init_buf=buf; 245 buf=NULL; 246 } 247 248 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; } 249 250 /* setup buffing BIO */ 251 if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; } 252 253 /* don't push the buffering BIO quite yet */ 254 255 ssl3_init_finished_mac(s); 256 257 s->state=SSL3_ST_CW_CLNT_HELLO_A; 258 s->ctx->stats.sess_connect++; 259 s->init_num=0; 260 break; 261 262 case SSL3_ST_CW_CLNT_HELLO_A: 263 case SSL3_ST_CW_CLNT_HELLO_B: 264 265 s->shutdown=0; 266 ret=ssl3_client_hello(s); 267 if (ret <= 0) goto end; 268 s->state=SSL3_ST_CR_SRVR_HELLO_A; 269 s->init_num=0; 270 271 /* turn on buffering for the next lot of output */ 272 if (s->bbio != s->wbio) 273 s->wbio=BIO_push(s->bbio,s->wbio); 274 275 break; 276 277 case SSL3_ST_CR_SRVR_HELLO_A: 278 case SSL3_ST_CR_SRVR_HELLO_B: 279 ret=ssl3_get_server_hello(s); 280 if (ret <= 0) goto end; 281 282 if (s->hit) 283 s->state=SSL3_ST_CR_FINISHED_A; 284 else 285 s->state=SSL3_ST_CR_CERT_A; 286 s->init_num=0; 287 break; 288 289 case SSL3_ST_CR_CERT_A: 290 case SSL3_ST_CR_CERT_B: 291#ifndef OPENSSL_NO_TLSEXT 292 ret=ssl3_check_finished(s); 293 if (ret <= 0) goto end; 294 if (ret == 2) 295 { 296 s->hit = 1; 297 if (s->tlsext_ticket_expected) 298 s->state=SSL3_ST_CR_SESSION_TICKET_A; 299 else 300 s->state=SSL3_ST_CR_FINISHED_A; 301 s->init_num=0; 302 break; 303 } 304#endif 305 /* Check if it is anon DH/ECDH */ 306 /* or PSK */ 307 if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) && 308 !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) 309 { 310 ret=ssl3_get_server_certificate(s); 311 if (ret <= 0) goto end; 312#ifndef OPENSSL_NO_TLSEXT 313 if (s->tlsext_status_expected) 314 s->state=SSL3_ST_CR_CERT_STATUS_A; 315 else 316 s->state=SSL3_ST_CR_KEY_EXCH_A; 317 } 318 else 319 { 320 skip = 1; 321 s->state=SSL3_ST_CR_KEY_EXCH_A; 322 } 323#else 324 } 325 else 326 skip=1; 327 328 s->state=SSL3_ST_CR_KEY_EXCH_A; 329#endif 330 s->init_num=0; 331 break; 332 333 case SSL3_ST_CR_KEY_EXCH_A: 334 case SSL3_ST_CR_KEY_EXCH_B: 335 ret=ssl3_get_key_exchange(s); 336 if (ret <= 0) goto end; 337 s->state=SSL3_ST_CR_CERT_REQ_A; 338 s->init_num=0; 339 340 /* at this point we check that we have the 341 * required stuff from the server */ 342 if (!ssl3_check_cert_and_algorithm(s)) 343 { 344 ret= -1; 345 goto end; 346 } 347 break; 348 349 case SSL3_ST_CR_CERT_REQ_A: 350 case SSL3_ST_CR_CERT_REQ_B: 351 ret=ssl3_get_certificate_request(s); 352 if (ret <= 0) goto end; 353 s->state=SSL3_ST_CR_SRVR_DONE_A; 354 s->init_num=0; 355 break; 356 357 case SSL3_ST_CR_SRVR_DONE_A: 358 case SSL3_ST_CR_SRVR_DONE_B: 359 ret=ssl3_get_server_done(s); 360 if (ret <= 0) goto end; 361 if (s->s3->tmp.cert_req) 362 s->state=SSL3_ST_CW_CERT_A; 363 else 364 s->state=SSL3_ST_CW_KEY_EXCH_A; 365 s->init_num=0; 366 367 break; 368 369 case SSL3_ST_CW_CERT_A: 370 case SSL3_ST_CW_CERT_B: 371 case SSL3_ST_CW_CERT_C: 372 case SSL3_ST_CW_CERT_D: 373 ret=ssl3_send_client_certificate(s); 374 if (ret <= 0) goto end; 375 s->state=SSL3_ST_CW_KEY_EXCH_A; 376 s->init_num=0; 377 break; 378 379 case SSL3_ST_CW_KEY_EXCH_A: 380 case SSL3_ST_CW_KEY_EXCH_B: 381 ret=ssl3_send_client_key_exchange(s); 382 if (ret <= 0) goto end; 383 /* EAY EAY EAY need to check for DH fix cert 384 * sent back */ 385 /* For TLS, cert_req is set to 2, so a cert chain 386 * of nothing is sent, but no verify packet is sent */ 387 /* XXX: For now, we do not support client 388 * authentication in ECDH cipher suites with 389 * ECDH (rather than ECDSA) certificates. 390 * We need to skip the certificate verify 391 * message when client's ECDH public key is sent 392 * inside the client certificate. 393 */ 394 if (s->s3->tmp.cert_req == 1) 395 { 396 s->state=SSL3_ST_CW_CERT_VRFY_A; 397 } 398 else 399 { 400 s->state=SSL3_ST_CW_CHANGE_A; 401 s->s3->change_cipher_spec=0; 402 } 403 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) 404 { 405 s->state=SSL3_ST_CW_CHANGE_A; 406 s->s3->change_cipher_spec=0; 407 } 408 409 s->init_num=0; 410 break; 411 412 case SSL3_ST_CW_CERT_VRFY_A: 413 case SSL3_ST_CW_CERT_VRFY_B: 414 ret=ssl3_send_client_verify(s); 415 if (ret <= 0) goto end; 416 s->state=SSL3_ST_CW_CHANGE_A; 417 s->init_num=0; 418 s->s3->change_cipher_spec=0; 419 break; 420 421 case SSL3_ST_CW_CHANGE_A: 422 case SSL3_ST_CW_CHANGE_B: 423 ret=ssl3_send_change_cipher_spec(s, 424 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B); 425 if (ret <= 0) goto end; 426 s->state=SSL3_ST_CW_FINISHED_A; 427 s->init_num=0; 428 429 s->session->cipher=s->s3->tmp.new_cipher; 430#ifdef OPENSSL_NO_COMP 431 s->session->compress_meth=0; 432#else 433 if (s->s3->tmp.new_compression == NULL) 434 s->session->compress_meth=0; 435 else 436 s->session->compress_meth= 437 s->s3->tmp.new_compression->id; 438#endif 439 if (!s->method->ssl3_enc->setup_key_block(s)) 440 { 441 ret= -1; 442 goto end; 443 } 444 445 if (!s->method->ssl3_enc->change_cipher_state(s, 446 SSL3_CHANGE_CIPHER_CLIENT_WRITE)) 447 { 448 ret= -1; 449 goto end; 450 } 451 452 break; 453 454 case SSL3_ST_CW_FINISHED_A: 455 case SSL3_ST_CW_FINISHED_B: 456 ret=ssl3_send_finished(s, 457 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B, 458 s->method->ssl3_enc->client_finished_label, 459 s->method->ssl3_enc->client_finished_label_len); 460 if (ret <= 0) goto end; 461 s->state=SSL3_ST_CW_FLUSH; 462 463 /* clear flags */ 464 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER; 465 if (s->hit) 466 { 467 s->s3->tmp.next_state=SSL_ST_OK; 468 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED) 469 { 470 s->state=SSL_ST_OK; 471 s->s3->flags|=SSL3_FLAGS_POP_BUFFER; 472 s->s3->delay_buf_pop_ret=0; 473 } 474 } 475 else 476 { 477#ifndef OPENSSL_NO_TLSEXT 478 /* Allow NewSessionTicket if ticket expected */ 479 if (s->tlsext_ticket_expected) 480 s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A; 481 else 482#endif 483 484 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A; 485 } 486 s->init_num=0; 487 break; 488 489#ifndef OPENSSL_NO_TLSEXT 490 case SSL3_ST_CR_SESSION_TICKET_A: 491 case SSL3_ST_CR_SESSION_TICKET_B: 492 ret=ssl3_get_new_session_ticket(s); 493 if (ret <= 0) goto end; 494 s->state=SSL3_ST_CR_FINISHED_A; 495 s->init_num=0; 496 break; 497 498 case SSL3_ST_CR_CERT_STATUS_A: 499 case SSL3_ST_CR_CERT_STATUS_B: 500 ret=ssl3_get_cert_status(s); 501 if (ret <= 0) goto end; 502 s->state=SSL3_ST_CR_KEY_EXCH_A; 503 s->init_num=0; 504 break; 505#endif 506 507 case SSL3_ST_CR_FINISHED_A: 508 case SSL3_ST_CR_FINISHED_B: 509 510 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A, 511 SSL3_ST_CR_FINISHED_B); 512 if (ret <= 0) goto end; 513 514 if (s->hit) 515 s->state=SSL3_ST_CW_CHANGE_A; 516 else 517 s->state=SSL_ST_OK; 518 s->init_num=0; 519 break; 520 521 case SSL3_ST_CW_FLUSH: 522 s->rwstate=SSL_WRITING; 523 if (BIO_flush(s->wbio) <= 0) 524 { 525 ret= -1; 526 goto end; 527 } 528 s->rwstate=SSL_NOTHING; 529 s->state=s->s3->tmp.next_state; 530 break; 531 532 case SSL_ST_OK: 533 /* clean a few things up */ 534 ssl3_cleanup_key_block(s); 535 536 if (s->init_buf != NULL) 537 { 538 BUF_MEM_free(s->init_buf); 539 s->init_buf=NULL; 540 } 541 542 /* If we are not 'joining' the last two packets, 543 * remove the buffering now */ 544 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER)) 545 ssl_free_wbio_buffer(s); 546 /* else do it later in ssl3_write */ 547 548 s->init_num=0; 549 s->new_session=0; 550 551 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT); 552 if (s->hit) s->ctx->stats.sess_hit++; 553 554 ret=1; 555 /* s->server=0; */ 556 s->handshake_func=ssl3_connect; 557 s->ctx->stats.sess_connect_good++; 558 559 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1); 560 561 goto end; 562 /* break; */ 563 564 default: 565 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE); 566 ret= -1; 567 goto end; 568 /* break; */ 569 } 570 571 /* did we do anything */ 572 if (!s->s3->tmp.reuse_message && !skip) 573 { 574 if (s->debug) 575 { 576 if ((ret=BIO_flush(s->wbio)) <= 0) 577 goto end; 578 } 579 580 if ((cb != NULL) && (s->state != state)) 581 { 582 new_state=s->state; 583 s->state=state; 584 cb(s,SSL_CB_CONNECT_LOOP,1); 585 s->state=new_state; 586 } 587 } 588 skip=0; 589 } 590end: 591 s->in_handshake--; 592 if (buf != NULL) 593 BUF_MEM_free(buf); 594 if (cb != NULL) 595 cb(s,SSL_CB_CONNECT_EXIT,ret); 596 return(ret); 597 } 598 599 600int ssl3_client_hello(SSL *s) 601 { 602 unsigned char *buf; 603 unsigned char *p,*d; 604 int i; 605 unsigned long Time,l; 606#ifndef OPENSSL_NO_COMP 607 int j; 608 SSL_COMP *comp; 609#endif 610 611 buf=(unsigned char *)s->init_buf->data; 612 if (s->state == SSL3_ST_CW_CLNT_HELLO_A) 613 { 614 SSL_SESSION *sess = s->session; 615 if ((sess == NULL) || 616 (sess->ssl_version != s->version) || 617#ifdef OPENSSL_NO_TLSEXT 618 !sess->session_id_length || 619#else 620 (!sess->session_id_length && !sess->tlsext_tick) || 621#endif 622 (sess->not_resumable)) 623 { 624 if (!ssl_get_new_session(s,0)) 625 goto err; 626 } 627 /* else use the pre-loaded session */ 628 629 p=s->s3->client_random; 630 Time=(unsigned long)time(NULL); /* Time */ 631 l2n(Time,p); 632 if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0) 633 goto err; 634 635 /* Do the message type and length last */ 636 d=p= &(buf[4]); 637 638 *(p++)=s->version>>8; 639 *(p++)=s->version&0xff; 640 s->client_version=s->version; 641 642 /* Random stuff */ 643 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE); 644 p+=SSL3_RANDOM_SIZE; 645 646 /* Session ID */ 647 if (s->new_session) 648 i=0; 649 else 650 i=s->session->session_id_length; 651 *(p++)=i; 652 if (i != 0) 653 { 654 if (i > (int)sizeof(s->session->session_id)) 655 { 656 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); 657 goto err; 658 } 659 memcpy(p,s->session->session_id,i); 660 p+=i; 661 } 662 663 /* Ciphers supported */ 664 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0); 665 if (i == 0) 666 { 667 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE); 668 goto err; 669 } 670 s2n(i,p); 671 p+=i; 672 673 /* COMPRESSION */ 674#ifdef OPENSSL_NO_COMP 675 *(p++)=1; 676#else 677 678 if ((s->options & SSL_OP_NO_COMPRESSION) 679 || !s->ctx->comp_methods) 680 j=0; 681 else 682 j=sk_SSL_COMP_num(s->ctx->comp_methods); 683 *(p++)=1+j; 684 for (i=0; i<j; i++) 685 { 686 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i); 687 *(p++)=comp->id; 688 } 689#endif 690 *(p++)=0; /* Add the NULL method */ 691 692#ifndef OPENSSL_NO_TLSEXT 693 /* TLS extensions*/ 694 if (ssl_prepare_clienthello_tlsext(s) <= 0) 695 { 696 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT); 697 goto err; 698 } 699 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL) 700 { 701 SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR); 702 goto err; 703 } 704#endif 705 706 l=(p-d); 707 d=buf; 708 *(d++)=SSL3_MT_CLIENT_HELLO; 709 l2n3(l,d); 710 711 s->state=SSL3_ST_CW_CLNT_HELLO_B; 712 /* number of bytes to write */ 713 s->init_num=p-buf; 714 s->init_off=0; 715 } 716 717 /* SSL3_ST_CW_CLNT_HELLO_B */ 718 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 719err: 720 return(-1); 721 } 722 723int ssl3_get_server_hello(SSL *s) 724 { 725 STACK_OF(SSL_CIPHER) *sk; 726 const SSL_CIPHER *c; 727 unsigned char *p,*d; 728 int i,al,ok; 729 unsigned int j; 730 long n; 731#ifndef OPENSSL_NO_COMP 732 SSL_COMP *comp; 733#endif 734 735 n=s->method->ssl_get_message(s, 736 SSL3_ST_CR_SRVR_HELLO_A, 737 SSL3_ST_CR_SRVR_HELLO_B, 738 -1, 739 20000, /* ?? */ 740 &ok); 741 742 if (!ok) return((int)n); 743 744 if ( SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER) 745 { 746 if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST) 747 { 748 if ( s->d1->send_cookie == 0) 749 { 750 s->s3->tmp.reuse_message = 1; 751 return 1; 752 } 753 else /* already sent a cookie */ 754 { 755 al=SSL_AD_UNEXPECTED_MESSAGE; 756 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE); 757 goto f_err; 758 } 759 } 760 } 761 762 if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO) 763 { 764 al=SSL_AD_UNEXPECTED_MESSAGE; 765 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE); 766 goto f_err; 767 } 768 769 d=p=(unsigned char *)s->init_msg; 770 771 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff))) 772 { 773 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION); 774 s->version=(s->version&0xff00)|p[1]; 775 al=SSL_AD_PROTOCOL_VERSION; 776 goto f_err; 777 } 778 p+=2; 779 780 /* load the server hello data */ 781 /* load the server random */ 782 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE); 783 p+=SSL3_RANDOM_SIZE; 784 785 /* get the session-id */ 786 j= *(p++); 787 788 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE)) 789 { 790 al=SSL_AD_ILLEGAL_PARAMETER; 791 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG); 792 goto f_err; 793 } 794 795#ifndef OPENSSL_NO_TLSEXT 796 /* check if we want to resume the session based on external pre-shared secret */ 797 if (s->version >= TLS1_VERSION && s->tls_session_secret_cb) 798 { 799 SSL_CIPHER *pref_cipher=NULL; 800 s->session->master_key_length=sizeof(s->session->master_key); 801 if (s->tls_session_secret_cb(s, s->session->master_key, 802 &s->session->master_key_length, 803 NULL, &pref_cipher, 804 s->tls_session_secret_cb_arg)) 805 { 806 s->session->cipher = pref_cipher ? 807 pref_cipher : ssl_get_cipher_by_char(s, p+j); 808 } 809 } 810#endif /* OPENSSL_NO_TLSEXT */ 811 812 if (j != 0 && j == s->session->session_id_length 813 && memcmp(p,s->session->session_id,j) == 0) 814 { 815 if(s->sid_ctx_length != s->session->sid_ctx_length 816 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length)) 817 { 818 /* actually a client application bug */ 819 al=SSL_AD_ILLEGAL_PARAMETER; 820 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); 821 goto f_err; 822 } 823 s->hit=1; 824 } 825 else /* a miss or crap from the other end */ 826 { 827 /* If we were trying for session-id reuse, make a new 828 * SSL_SESSION so we don't stuff up other people */ 829 s->hit=0; 830 if (s->session->session_id_length > 0) 831 { 832 if (!ssl_get_new_session(s,0)) 833 { 834 al=SSL_AD_INTERNAL_ERROR; 835 goto f_err; 836 } 837 } 838 s->session->session_id_length=j; 839 memcpy(s->session->session_id,p,j); /* j could be 0 */ 840 } 841 p+=j; 842 c=ssl_get_cipher_by_char(s,p); 843 if (c == NULL) 844 { 845 /* unknown cipher */ 846 al=SSL_AD_ILLEGAL_PARAMETER; 847 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED); 848 goto f_err; 849 } 850 p+=ssl_put_cipher_by_char(s,NULL,NULL); 851 852 sk=ssl_get_ciphers_by_id(s); 853 i=sk_SSL_CIPHER_find(sk,c); 854 if (i < 0) 855 { 856 /* we did not say we would use this cipher */ 857 al=SSL_AD_ILLEGAL_PARAMETER; 858 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED); 859 goto f_err; 860 } 861 862 /* Depending on the session caching (internal/external), the cipher 863 and/or cipher_id values may not be set. Make sure that 864 cipher_id is set and use it for comparison. */ 865 if (s->session->cipher) 866 s->session->cipher_id = s->session->cipher->id; 867 if (s->hit && (s->session->cipher_id != c->id)) 868 { 869/* Workaround is now obsolete */ 870#if 0 871 if (!(s->options & 872 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG)) 873#endif 874 { 875 al=SSL_AD_ILLEGAL_PARAMETER; 876 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); 877 goto f_err; 878 } 879 } 880 s->s3->tmp.new_cipher=c; 881 if (!ssl3_digest_cached_records(s)) 882 goto f_err; 883 884 /* lets get the compression algorithm */ 885 /* COMPRESSION */ 886#ifdef OPENSSL_NO_COMP 887 if (*(p++) != 0) 888 { 889 al=SSL_AD_ILLEGAL_PARAMETER; 890 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); 891 goto f_err; 892 } 893 /* If compression is disabled we'd better not try to resume a session 894 * using compression. 895 */ 896 if (s->session->compress_meth != 0) 897 { 898 al=SSL_AD_INTERNAL_ERROR; 899 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_INCONSISTENT_COMPRESSION); 900 goto f_err; 901 } 902#else 903 j= *(p++); 904 if (s->hit && j != s->session->compress_meth) 905 { 906 al=SSL_AD_ILLEGAL_PARAMETER; 907 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED); 908 goto f_err; 909 } 910 if (j == 0) 911 comp=NULL; 912 else if (s->options & SSL_OP_NO_COMPRESSION) 913 { 914 al=SSL_AD_ILLEGAL_PARAMETER; 915 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_COMPRESSION_DISABLED); 916 goto f_err; 917 } 918 else 919 comp=ssl3_comp_find(s->ctx->comp_methods,j); 920 921 if ((j != 0) && (comp == NULL)) 922 { 923 al=SSL_AD_ILLEGAL_PARAMETER; 924 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); 925 goto f_err; 926 } 927 else 928 { 929 s->s3->tmp.new_compression=comp; 930 } 931#endif 932 933#ifndef OPENSSL_NO_TLSEXT 934 /* TLS extensions*/ 935 if (s->version >= SSL3_VERSION) 936 { 937 if (!ssl_parse_serverhello_tlsext(s,&p,d,n, &al)) 938 { 939 /* 'al' set by ssl_parse_serverhello_tlsext */ 940 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT); 941 goto f_err; 942 } 943 if (ssl_check_serverhello_tlsext(s) <= 0) 944 { 945 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SERVERHELLO_TLSEXT); 946 goto err; 947 } 948 } 949#endif 950 951 if (p != (d+n)) 952 { 953 /* wrong packet length */ 954 al=SSL_AD_DECODE_ERROR; 955 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH); 956 goto err; 957 } 958 959 return(1); 960f_err: 961 ssl3_send_alert(s,SSL3_AL_FATAL,al); 962err: 963 return(-1); 964 } 965 966int ssl3_get_server_certificate(SSL *s) 967 { 968 int al,i,ok,ret= -1; 969 unsigned long n,nc,llen,l; 970 X509 *x=NULL; 971 const unsigned char *q,*p; 972 unsigned char *d; 973 STACK_OF(X509) *sk=NULL; 974 SESS_CERT *sc; 975 EVP_PKEY *pkey=NULL; 976 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */ 977 978 n=s->method->ssl_get_message(s, 979 SSL3_ST_CR_CERT_A, 980 SSL3_ST_CR_CERT_B, 981 -1, 982 s->max_cert_list, 983 &ok); 984 985 if (!ok) return((int)n); 986 987 if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) || 988 ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) && 989 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE))) 990 { 991 s->s3->tmp.reuse_message=1; 992 return(1); 993 } 994 995 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE) 996 { 997 al=SSL_AD_UNEXPECTED_MESSAGE; 998 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE); 999 goto f_err; 1000 } 1001 p=d=(unsigned char *)s->init_msg; 1002 1003 if ((sk=sk_X509_new_null()) == NULL) 1004 { 1005 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE); 1006 goto err; 1007 } 1008 1009 n2l3(p,llen); 1010 if (llen+3 != n) 1011 { 1012 al=SSL_AD_DECODE_ERROR; 1013 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH); 1014 goto f_err; 1015 } 1016 for (nc=0; nc<llen; ) 1017 { 1018 n2l3(p,l); 1019 if ((l+nc+3) > llen) 1020 { 1021 al=SSL_AD_DECODE_ERROR; 1022 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); 1023 goto f_err; 1024 } 1025 1026 q=p; 1027 x=d2i_X509(NULL,&q,l); 1028 if (x == NULL) 1029 { 1030 al=SSL_AD_BAD_CERTIFICATE; 1031 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB); 1032 goto f_err; 1033 } 1034 if (q != (p+l)) 1035 { 1036 al=SSL_AD_DECODE_ERROR; 1037 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); 1038 goto f_err; 1039 } 1040 if (!sk_X509_push(sk,x)) 1041 { 1042 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE); 1043 goto err; 1044 } 1045 x=NULL; 1046 nc+=l+3; 1047 p=q; 1048 } 1049 1050 i=ssl_verify_cert_chain(s,sk); 1051 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0) 1052#ifndef OPENSSL_NO_KRB5 1053 && !((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) && 1054 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5)) 1055#endif /* OPENSSL_NO_KRB5 */ 1056 ) 1057 { 1058 al=ssl_verify_alarm_type(s->verify_result); 1059 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED); 1060 goto f_err; 1061 } 1062 ERR_clear_error(); /* but we keep s->verify_result */ 1063 1064 sc=ssl_sess_cert_new(); 1065 if (sc == NULL) goto err; 1066 1067 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert); 1068 s->session->sess_cert=sc; 1069 1070 sc->cert_chain=sk; 1071 /* Inconsistency alert: cert_chain does include the peer's 1072 * certificate, which we don't include in s3_srvr.c */ 1073 x=sk_X509_value(sk,0); 1074 sk=NULL; 1075 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/ 1076 1077 pkey=X509_get_pubkey(x); 1078 1079 /* VRS: allow null cert if auth == KRB5 */ 1080 need_cert = ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) && 1081 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5)) 1082 ? 0 : 1; 1083 1084#ifdef KSSL_DEBUG 1085 printf("pkey,x = %p, %p\n", pkey,x); 1086 printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey)); 1087 printf("cipher, alg, nc = %s, %lx, %lx, %d\n", s->s3->tmp.new_cipher->name, 1088 s->s3->tmp.new_cipher->algorithm_mkey, s->s3->tmp.new_cipher->algorithm_auth, need_cert); 1089#endif /* KSSL_DEBUG */ 1090 1091 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey))) 1092 { 1093 x=NULL; 1094 al=SSL3_AL_FATAL; 1095 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 1096 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); 1097 goto f_err; 1098 } 1099 1100 i=ssl_cert_type(x,pkey); 1101 if (need_cert && i < 0) 1102 { 1103 x=NULL; 1104 al=SSL3_AL_FATAL; 1105 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 1106 SSL_R_UNKNOWN_CERTIFICATE_TYPE); 1107 goto f_err; 1108 } 1109 1110 if (need_cert) 1111 { 1112 sc->peer_cert_type=i; 1113 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509); 1114 /* Why would the following ever happen? 1115 * We just created sc a couple of lines ago. */ 1116 if (sc->peer_pkeys[i].x509 != NULL) 1117 X509_free(sc->peer_pkeys[i].x509); 1118 sc->peer_pkeys[i].x509=x; 1119 sc->peer_key= &(sc->peer_pkeys[i]); 1120 1121 if (s->session->peer != NULL) 1122 X509_free(s->session->peer); 1123 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509); 1124 s->session->peer=x; 1125 } 1126 else 1127 { 1128 sc->peer_cert_type=i; 1129 sc->peer_key= NULL; 1130 1131 if (s->session->peer != NULL) 1132 X509_free(s->session->peer); 1133 s->session->peer=NULL; 1134 } 1135 s->session->verify_result = s->verify_result; 1136 1137 x=NULL; 1138 ret=1; 1139 1140 if (0) 1141 { 1142f_err: 1143 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1144 } 1145err: 1146 EVP_PKEY_free(pkey); 1147 X509_free(x); 1148 sk_X509_pop_free(sk,X509_free); 1149 return(ret); 1150 } 1151 1152int ssl3_get_key_exchange(SSL *s) 1153 { 1154#ifndef OPENSSL_NO_RSA 1155 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2]; 1156#endif 1157 EVP_MD_CTX md_ctx; 1158 unsigned char *param,*p; 1159 int al,i,j,param_len,ok; 1160 long n,alg_k,alg_a; 1161 EVP_PKEY *pkey=NULL; 1162#ifndef OPENSSL_NO_RSA 1163 RSA *rsa=NULL; 1164#endif 1165#ifndef OPENSSL_NO_DH 1166 DH *dh=NULL; 1167#endif 1168#ifndef OPENSSL_NO_ECDH 1169 EC_KEY *ecdh = NULL; 1170 BN_CTX *bn_ctx = NULL; 1171 EC_POINT *srvr_ecpoint = NULL; 1172 int curve_nid = 0; 1173 int encoded_pt_len = 0; 1174#endif 1175 1176 /* use same message size as in ssl3_get_certificate_request() 1177 * as ServerKeyExchange message may be skipped */ 1178 n=s->method->ssl_get_message(s, 1179 SSL3_ST_CR_KEY_EXCH_A, 1180 SSL3_ST_CR_KEY_EXCH_B, 1181 -1, 1182 s->max_cert_list, 1183 &ok); 1184 if (!ok) return((int)n); 1185 1186 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE) 1187 { 1188#ifndef OPENSSL_NO_PSK 1189 /* In plain PSK ciphersuite, ServerKeyExchange can be 1190 omitted if no identity hint is sent. Set 1191 session->sess_cert anyway to avoid problems 1192 later.*/ 1193 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK) 1194 { 1195 s->session->sess_cert=ssl_sess_cert_new(); 1196 if (s->ctx->psk_identity_hint) 1197 OPENSSL_free(s->ctx->psk_identity_hint); 1198 s->ctx->psk_identity_hint = NULL; 1199 } 1200#endif 1201 s->s3->tmp.reuse_message=1; 1202 return(1); 1203 } 1204 1205 param=p=(unsigned char *)s->init_msg; 1206 if (s->session->sess_cert != NULL) 1207 { 1208#ifndef OPENSSL_NO_RSA 1209 if (s->session->sess_cert->peer_rsa_tmp != NULL) 1210 { 1211 RSA_free(s->session->sess_cert->peer_rsa_tmp); 1212 s->session->sess_cert->peer_rsa_tmp=NULL; 1213 } 1214#endif 1215#ifndef OPENSSL_NO_DH 1216 if (s->session->sess_cert->peer_dh_tmp) 1217 { 1218 DH_free(s->session->sess_cert->peer_dh_tmp); 1219 s->session->sess_cert->peer_dh_tmp=NULL; 1220 } 1221#endif 1222#ifndef OPENSSL_NO_ECDH 1223 if (s->session->sess_cert->peer_ecdh_tmp) 1224 { 1225 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp); 1226 s->session->sess_cert->peer_ecdh_tmp=NULL; 1227 } 1228#endif 1229 } 1230 else 1231 { 1232 s->session->sess_cert=ssl_sess_cert_new(); 1233 } 1234 1235 param_len=0; 1236 alg_k=s->s3->tmp.new_cipher->algorithm_mkey; 1237 alg_a=s->s3->tmp.new_cipher->algorithm_auth; 1238 EVP_MD_CTX_init(&md_ctx); 1239 1240#ifndef OPENSSL_NO_PSK 1241 if (alg_k & SSL_kPSK) 1242 { 1243 char tmp_id_hint[PSK_MAX_IDENTITY_LEN+1]; 1244 1245 al=SSL_AD_HANDSHAKE_FAILURE; 1246 n2s(p,i); 1247 param_len=i+2; 1248 /* Store PSK identity hint for later use, hint is used 1249 * in ssl3_send_client_key_exchange. Assume that the 1250 * maximum length of a PSK identity hint can be as 1251 * long as the maximum length of a PSK identity. */ 1252 if (i > PSK_MAX_IDENTITY_LEN) 1253 { 1254 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1255 SSL_R_DATA_LENGTH_TOO_LONG); 1256 goto f_err; 1257 } 1258 if (param_len > n) 1259 { 1260 al=SSL_AD_DECODE_ERROR; 1261 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1262 SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH); 1263 goto f_err; 1264 } 1265 /* If received PSK identity hint contains NULL 1266 * characters, the hint is truncated from the first 1267 * NULL. p may not be ending with NULL, so create a 1268 * NULL-terminated string. */ 1269 memcpy(tmp_id_hint, p, i); 1270 memset(tmp_id_hint+i, 0, PSK_MAX_IDENTITY_LEN+1-i); 1271 if (s->ctx->psk_identity_hint != NULL) 1272 OPENSSL_free(s->ctx->psk_identity_hint); 1273 s->ctx->psk_identity_hint = BUF_strdup(tmp_id_hint); 1274 if (s->ctx->psk_identity_hint == NULL) 1275 { 1276 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); 1277 goto f_err; 1278 } 1279 1280 p+=i; 1281 n-=param_len; 1282 } 1283 else 1284#endif /* !OPENSSL_NO_PSK */ 1285#ifndef OPENSSL_NO_RSA 1286 if (alg_k & SSL_kRSA) 1287 { 1288 if ((rsa=RSA_new()) == NULL) 1289 { 1290 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1291 goto err; 1292 } 1293 n2s(p,i); 1294 param_len=i+2; 1295 if (param_len > n) 1296 { 1297 al=SSL_AD_DECODE_ERROR; 1298 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH); 1299 goto f_err; 1300 } 1301 if (!(rsa->n=BN_bin2bn(p,i,rsa->n))) 1302 { 1303 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1304 goto err; 1305 } 1306 p+=i; 1307 1308 n2s(p,i); 1309 param_len+=i+2; 1310 if (param_len > n) 1311 { 1312 al=SSL_AD_DECODE_ERROR; 1313 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH); 1314 goto f_err; 1315 } 1316 if (!(rsa->e=BN_bin2bn(p,i,rsa->e))) 1317 { 1318 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1319 goto err; 1320 } 1321 p+=i; 1322 n-=param_len; 1323 1324 /* this should be because we are using an export cipher */ 1325 if (alg_a & SSL_aRSA) 1326 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1327 else 1328 { 1329 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1330 goto err; 1331 } 1332 s->session->sess_cert->peer_rsa_tmp=rsa; 1333 rsa=NULL; 1334 } 1335#else /* OPENSSL_NO_RSA */ 1336 if (0) 1337 ; 1338#endif 1339#ifndef OPENSSL_NO_DH 1340 else if (alg_k & SSL_kEDH) 1341 { 1342 if ((dh=DH_new()) == NULL) 1343 { 1344 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB); 1345 goto err; 1346 } 1347 n2s(p,i); 1348 param_len=i+2; 1349 if (param_len > n) 1350 { 1351 al=SSL_AD_DECODE_ERROR; 1352 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH); 1353 goto f_err; 1354 } 1355 if (!(dh->p=BN_bin2bn(p,i,NULL))) 1356 { 1357 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1358 goto err; 1359 } 1360 p+=i; 1361 1362 n2s(p,i); 1363 param_len+=i+2; 1364 if (param_len > n) 1365 { 1366 al=SSL_AD_DECODE_ERROR; 1367 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH); 1368 goto f_err; 1369 } 1370 if (!(dh->g=BN_bin2bn(p,i,NULL))) 1371 { 1372 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1373 goto err; 1374 } 1375 p+=i; 1376 1377 n2s(p,i); 1378 param_len+=i+2; 1379 if (param_len > n) 1380 { 1381 al=SSL_AD_DECODE_ERROR; 1382 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH); 1383 goto f_err; 1384 } 1385 if (!(dh->pub_key=BN_bin2bn(p,i,NULL))) 1386 { 1387 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1388 goto err; 1389 } 1390 p+=i; 1391 n-=param_len; 1392 1393#ifndef OPENSSL_NO_RSA 1394 if (alg_a & SSL_aRSA) 1395 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1396#else 1397 if (0) 1398 ; 1399#endif 1400#ifndef OPENSSL_NO_DSA 1401 else if (alg_a & SSL_aDSS) 1402 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509); 1403#endif 1404 /* else anonymous DH, so no certificate or pkey. */ 1405 1406 s->session->sess_cert->peer_dh_tmp=dh; 1407 dh=NULL; 1408 } 1409 else if ((alg_k & SSL_kDHr) || (alg_k & SSL_kDHd)) 1410 { 1411 al=SSL_AD_ILLEGAL_PARAMETER; 1412 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER); 1413 goto f_err; 1414 } 1415#endif /* !OPENSSL_NO_DH */ 1416 1417#ifndef OPENSSL_NO_ECDH 1418 else if (alg_k & SSL_kEECDH) 1419 { 1420 EC_GROUP *ngroup; 1421 const EC_GROUP *group; 1422 1423 if ((ecdh=EC_KEY_new()) == NULL) 1424 { 1425 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1426 goto err; 1427 } 1428 1429 /* Extract elliptic curve parameters and the 1430 * server's ephemeral ECDH public key. 1431 * Keep accumulating lengths of various components in 1432 * param_len and make sure it never exceeds n. 1433 */ 1434 1435 /* XXX: For now we only support named (not generic) curves 1436 * and the ECParameters in this case is just three bytes. 1437 */ 1438 param_len=3; 1439 if ((param_len > n) || 1440 (*p != NAMED_CURVE_TYPE) || 1441 ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0)) 1442 { 1443 al=SSL_AD_INTERNAL_ERROR; 1444 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); 1445 goto f_err; 1446 } 1447 1448 ngroup = EC_GROUP_new_by_curve_name(curve_nid); 1449 if (ngroup == NULL) 1450 { 1451 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB); 1452 goto err; 1453 } 1454 if (EC_KEY_set_group(ecdh, ngroup) == 0) 1455 { 1456 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB); 1457 goto err; 1458 } 1459 EC_GROUP_free(ngroup); 1460 1461 group = EC_KEY_get0_group(ecdh); 1462 1463 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && 1464 (EC_GROUP_get_degree(group) > 163)) 1465 { 1466 al=SSL_AD_EXPORT_RESTRICTION; 1467 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER); 1468 goto f_err; 1469 } 1470 1471 p+=3; 1472 1473 /* Next, get the encoded ECPoint */ 1474 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) || 1475 ((bn_ctx = BN_CTX_new()) == NULL)) 1476 { 1477 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1478 goto err; 1479 } 1480 1481 encoded_pt_len = *p; /* length of encoded point */ 1482 p+=1; 1483 param_len += (1 + encoded_pt_len); 1484 if ((param_len > n) || 1485 (EC_POINT_oct2point(group, srvr_ecpoint, 1486 p, encoded_pt_len, bn_ctx) == 0)) 1487 { 1488 al=SSL_AD_DECODE_ERROR; 1489 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT); 1490 goto f_err; 1491 } 1492 1493 n-=param_len; 1494 p+=encoded_pt_len; 1495 1496 /* The ECC/TLS specification does not mention 1497 * the use of DSA to sign ECParameters in the server 1498 * key exchange message. We do support RSA and ECDSA. 1499 */ 1500 if (0) ; 1501#ifndef OPENSSL_NO_RSA 1502 else if (alg_a & SSL_aRSA) 1503 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1504#endif 1505#ifndef OPENSSL_NO_ECDSA 1506 else if (alg_a & SSL_aECDSA) 1507 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509); 1508#endif 1509 /* else anonymous ECDH, so no certificate or pkey. */ 1510 EC_KEY_set_public_key(ecdh, srvr_ecpoint); 1511 s->session->sess_cert->peer_ecdh_tmp=ecdh; 1512 ecdh=NULL; 1513 BN_CTX_free(bn_ctx); 1514 bn_ctx = NULL; 1515 EC_POINT_free(srvr_ecpoint); 1516 srvr_ecpoint = NULL; 1517 } 1518 else if (alg_k) 1519 { 1520 al=SSL_AD_UNEXPECTED_MESSAGE; 1521 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE); 1522 goto f_err; 1523 } 1524#endif /* !OPENSSL_NO_ECDH */ 1525 1526 1527 /* p points to the next byte, there are 'n' bytes left */ 1528 1529 /* if it was signed, check the signature */ 1530 if (pkey != NULL) 1531 { 1532 n2s(p,i); 1533 n-=2; 1534 j=EVP_PKEY_size(pkey); 1535 1536 if ((i != n) || (n > j) || (n <= 0)) 1537 { 1538 /* wrong packet length */ 1539 al=SSL_AD_DECODE_ERROR; 1540 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH); 1541 goto f_err; 1542 } 1543 1544#ifndef OPENSSL_NO_RSA 1545 if (pkey->type == EVP_PKEY_RSA) 1546 { 1547 int num; 1548 1549 j=0; 1550 q=md_buf; 1551 for (num=2; num > 0; num--) 1552 { 1553 EVP_DigestInit_ex(&md_ctx,(num == 2) 1554 ?s->ctx->md5:s->ctx->sha1, NULL); 1555 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); 1556 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); 1557 EVP_DigestUpdate(&md_ctx,param,param_len); 1558 EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i); 1559 q+=i; 1560 j+=i; 1561 } 1562 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n, 1563 pkey->pkey.rsa); 1564 if (i < 0) 1565 { 1566 al=SSL_AD_DECRYPT_ERROR; 1567 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT); 1568 goto f_err; 1569 } 1570 if (i == 0) 1571 { 1572 /* bad signature */ 1573 al=SSL_AD_DECRYPT_ERROR; 1574 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE); 1575 goto f_err; 1576 } 1577 } 1578 else 1579#endif 1580#ifndef OPENSSL_NO_DSA 1581 if (pkey->type == EVP_PKEY_DSA) 1582 { 1583 /* lets do DSS */ 1584 EVP_VerifyInit_ex(&md_ctx,EVP_dss1(), NULL); 1585 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); 1586 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); 1587 EVP_VerifyUpdate(&md_ctx,param,param_len); 1588 if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0) 1589 { 1590 /* bad signature */ 1591 al=SSL_AD_DECRYPT_ERROR; 1592 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE); 1593 goto f_err; 1594 } 1595 } 1596 else 1597#endif 1598#ifndef OPENSSL_NO_ECDSA 1599 if (pkey->type == EVP_PKEY_EC) 1600 { 1601 /* let's do ECDSA */ 1602 EVP_VerifyInit_ex(&md_ctx,EVP_ecdsa(), NULL); 1603 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); 1604 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); 1605 EVP_VerifyUpdate(&md_ctx,param,param_len); 1606 if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0) 1607 { 1608 /* bad signature */ 1609 al=SSL_AD_DECRYPT_ERROR; 1610 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE); 1611 goto f_err; 1612 } 1613 } 1614 else 1615#endif 1616 { 1617 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1618 goto err; 1619 } 1620 } 1621 else 1622 { 1623 if (!(alg_a & SSL_aNULL) && !(alg_k & SSL_kPSK)) 1624 /* aNULL or kPSK do not need public keys */ 1625 { 1626 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1627 goto err; 1628 } 1629 /* still data left over */ 1630 if (n != 0) 1631 { 1632 al=SSL_AD_DECODE_ERROR; 1633 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE); 1634 goto f_err; 1635 } 1636 } 1637 EVP_PKEY_free(pkey); 1638 EVP_MD_CTX_cleanup(&md_ctx); 1639 return(1); 1640f_err: 1641 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1642err: 1643 EVP_PKEY_free(pkey); 1644#ifndef OPENSSL_NO_RSA 1645 if (rsa != NULL) 1646 RSA_free(rsa); 1647#endif 1648#ifndef OPENSSL_NO_DH 1649 if (dh != NULL) 1650 DH_free(dh); 1651#endif 1652#ifndef OPENSSL_NO_ECDH 1653 BN_CTX_free(bn_ctx); 1654 EC_POINT_free(srvr_ecpoint); 1655 if (ecdh != NULL) 1656 EC_KEY_free(ecdh); 1657#endif 1658 EVP_MD_CTX_cleanup(&md_ctx); 1659 return(-1); 1660 } 1661 1662int ssl3_get_certificate_request(SSL *s) 1663 { 1664 int ok,ret=0; 1665 unsigned long n,nc,l; 1666 unsigned int llen,ctype_num,i; 1667 X509_NAME *xn=NULL; 1668 const unsigned char *p,*q; 1669 unsigned char *d; 1670 STACK_OF(X509_NAME) *ca_sk=NULL; 1671 1672 n=s->method->ssl_get_message(s, 1673 SSL3_ST_CR_CERT_REQ_A, 1674 SSL3_ST_CR_CERT_REQ_B, 1675 -1, 1676 s->max_cert_list, 1677 &ok); 1678 1679 if (!ok) return((int)n); 1680 1681 s->s3->tmp.cert_req=0; 1682 1683 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE) 1684 { 1685 s->s3->tmp.reuse_message=1; 1686 return(1); 1687 } 1688 1689 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST) 1690 { 1691 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 1692 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE); 1693 goto err; 1694 } 1695 1696 /* TLS does not like anon-DH with client cert */ 1697 if (s->version > SSL3_VERSION) 1698 { 1699 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) 1700 { 1701 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 1702 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER); 1703 goto err; 1704 } 1705 } 1706 1707 p=d=(unsigned char *)s->init_msg; 1708 1709 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL) 1710 { 1711 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE); 1712 goto err; 1713 } 1714 1715 /* get the certificate types */ 1716 ctype_num= *(p++); 1717 if (ctype_num > SSL3_CT_NUMBER) 1718 ctype_num=SSL3_CT_NUMBER; 1719 for (i=0; i<ctype_num; i++) 1720 s->s3->tmp.ctype[i]= p[i]; 1721 p+=ctype_num; 1722 1723 /* get the CA RDNs */ 1724 n2s(p,llen); 1725#if 0 1726{ 1727FILE *out; 1728out=fopen("/tmp/vsign.der","w"); 1729fwrite(p,1,llen,out); 1730fclose(out); 1731} 1732#endif 1733 1734 if ((llen+ctype_num+2+1) != n) 1735 { 1736 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1737 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH); 1738 goto err; 1739 } 1740 1741 for (nc=0; nc<llen; ) 1742 { 1743 n2s(p,l); 1744 if ((l+nc+2) > llen) 1745 { 1746 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG)) 1747 goto cont; /* netscape bugs */ 1748 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1749 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG); 1750 goto err; 1751 } 1752 1753 q=p; 1754 1755 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL) 1756 { 1757 /* If netscape tolerance is on, ignore errors */ 1758 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG) 1759 goto cont; 1760 else 1761 { 1762 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1763 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB); 1764 goto err; 1765 } 1766 } 1767 1768 if (q != (p+l)) 1769 { 1770 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1771 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH); 1772 goto err; 1773 } 1774 if (!sk_X509_NAME_push(ca_sk,xn)) 1775 { 1776 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE); 1777 goto err; 1778 } 1779 1780 p+=l; 1781 nc+=l+2; 1782 } 1783 1784 if (0) 1785 { 1786cont: 1787 ERR_clear_error(); 1788 } 1789 1790 /* we should setup a certificate to return.... */ 1791 s->s3->tmp.cert_req=1; 1792 s->s3->tmp.ctype_num=ctype_num; 1793 if (s->s3->tmp.ca_names != NULL) 1794 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free); 1795 s->s3->tmp.ca_names=ca_sk; 1796 ca_sk=NULL; 1797 1798 ret=1; 1799err: 1800 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free); 1801 return(ret); 1802 } 1803 1804static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b) 1805 { 1806 return(X509_NAME_cmp(*a,*b)); 1807 } 1808#ifndef OPENSSL_NO_TLSEXT 1809int ssl3_get_new_session_ticket(SSL *s) 1810 { 1811 int ok,al,ret=0, ticklen; 1812 long n; 1813 const unsigned char *p; 1814 unsigned char *d; 1815 1816 n=s->method->ssl_get_message(s, 1817 SSL3_ST_CR_SESSION_TICKET_A, 1818 SSL3_ST_CR_SESSION_TICKET_B, 1819 -1, 1820 16384, 1821 &ok); 1822 1823 if (!ok) 1824 return((int)n); 1825 1826 if (s->s3->tmp.message_type == SSL3_MT_FINISHED) 1827 { 1828 s->s3->tmp.reuse_message=1; 1829 return(1); 1830 } 1831 if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET) 1832 { 1833 al=SSL_AD_UNEXPECTED_MESSAGE; 1834 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_BAD_MESSAGE_TYPE); 1835 goto f_err; 1836 } 1837 if (n < 6) 1838 { 1839 /* need at least ticket_lifetime_hint + ticket length */ 1840 al = SSL3_AL_FATAL,SSL_AD_DECODE_ERROR; 1841 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH); 1842 goto f_err; 1843 } 1844 1845 p=d=(unsigned char *)s->init_msg; 1846 n2l(p, s->session->tlsext_tick_lifetime_hint); 1847 n2s(p, ticklen); 1848 /* ticket_lifetime_hint + ticket_length + ticket */ 1849 if (ticklen + 6 != n) 1850 { 1851 al = SSL3_AL_FATAL,SSL_AD_DECODE_ERROR; 1852 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH); 1853 goto f_err; 1854 } 1855 if (s->session->tlsext_tick) 1856 { 1857 OPENSSL_free(s->session->tlsext_tick); 1858 s->session->tlsext_ticklen = 0; 1859 } 1860 s->session->tlsext_tick = OPENSSL_malloc(ticklen); 1861 if (!s->session->tlsext_tick) 1862 { 1863 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE); 1864 goto err; 1865 } 1866 memcpy(s->session->tlsext_tick, p, ticklen); 1867 s->session->tlsext_ticklen = ticklen; 1868 /* There are two ways to detect a resumed ticket sesion. 1869 * One is to set an appropriate session ID and then the server 1870 * must return a match in ServerHello. This allows the normal 1871 * client session ID matching to work and we know much 1872 * earlier that the ticket has been accepted. 1873 * 1874 * The other way is to set zero length session ID when the 1875 * ticket is presented and rely on the handshake to determine 1876 * session resumption. 1877 * 1878 * We choose the former approach because this fits in with 1879 * assumptions elsewhere in OpenSSL. The session ID is set 1880 * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the 1881 * ticket. 1882 */ 1883 EVP_Digest(p, ticklen, 1884 s->session->session_id, &s->session->session_id_length, 1885#ifndef OPENSSL_NO_SHA256 1886 EVP_sha256(), NULL); 1887#else 1888 EVP_sha1(), NULL); 1889#endif 1890 ret=1; 1891 return(ret); 1892f_err: 1893 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1894err: 1895 return(-1); 1896 } 1897 1898int ssl3_get_cert_status(SSL *s) 1899 { 1900 int ok, al; 1901 unsigned long resplen,n; 1902 const unsigned char *p; 1903 1904 n=s->method->ssl_get_message(s, 1905 SSL3_ST_CR_CERT_STATUS_A, 1906 SSL3_ST_CR_CERT_STATUS_B, 1907 SSL3_MT_CERTIFICATE_STATUS, 1908 16384, 1909 &ok); 1910 1911 if (!ok) return((int)n); 1912 if (n < 4) 1913 { 1914 /* need at least status type + length */ 1915 al = SSL_AD_DECODE_ERROR; 1916 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH); 1917 goto f_err; 1918 } 1919 p = (unsigned char *)s->init_msg; 1920 if (*p++ != TLSEXT_STATUSTYPE_ocsp) 1921 { 1922 al = SSL_AD_DECODE_ERROR; 1923 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_UNSUPPORTED_STATUS_TYPE); 1924 goto f_err; 1925 } 1926 n2l3(p, resplen); 1927 if (resplen + 4 != n) 1928 { 1929 al = SSL_AD_DECODE_ERROR; 1930 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH); 1931 goto f_err; 1932 } 1933 if (s->tlsext_ocsp_resp) 1934 OPENSSL_free(s->tlsext_ocsp_resp); 1935 s->tlsext_ocsp_resp = BUF_memdup(p, resplen); 1936 if (!s->tlsext_ocsp_resp) 1937 { 1938 al = SSL_AD_INTERNAL_ERROR; 1939 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE); 1940 goto f_err; 1941 } 1942 s->tlsext_ocsp_resplen = resplen; 1943 if (s->ctx->tlsext_status_cb) 1944 { 1945 int ret; 1946 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg); 1947 if (ret == 0) 1948 { 1949 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE; 1950 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_INVALID_STATUS_RESPONSE); 1951 goto f_err; 1952 } 1953 if (ret < 0) 1954 { 1955 al = SSL_AD_INTERNAL_ERROR; 1956 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE); 1957 goto f_err; 1958 } 1959 } 1960 return 1; 1961f_err: 1962 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1963 return(-1); 1964 } 1965#endif 1966 1967int ssl3_get_server_done(SSL *s) 1968 { 1969 int ok,ret=0; 1970 long n; 1971 1972 n=s->method->ssl_get_message(s, 1973 SSL3_ST_CR_SRVR_DONE_A, 1974 SSL3_ST_CR_SRVR_DONE_B, 1975 SSL3_MT_SERVER_DONE, 1976 30, /* should be very small, like 0 :-) */ 1977 &ok); 1978 1979 if (!ok) return((int)n); 1980 if (n > 0) 1981 { 1982 /* should contain no data */ 1983 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1984 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH); 1985 return -1; 1986 } 1987 ret=1; 1988 return(ret); 1989 } 1990 1991 1992int ssl3_send_client_key_exchange(SSL *s) 1993 { 1994 unsigned char *p,*d; 1995 int n; 1996 unsigned long alg_k; 1997#ifndef OPENSSL_NO_RSA 1998 unsigned char *q; 1999 EVP_PKEY *pkey=NULL; 2000#endif 2001#ifndef OPENSSL_NO_KRB5 2002 KSSL_ERR kssl_err; 2003#endif /* OPENSSL_NO_KRB5 */ 2004#ifndef OPENSSL_NO_ECDH 2005 EC_KEY *clnt_ecdh = NULL; 2006 const EC_POINT *srvr_ecpoint = NULL; 2007 EVP_PKEY *srvr_pub_pkey = NULL; 2008 unsigned char *encodedPoint = NULL; 2009 int encoded_pt_len = 0; 2010 BN_CTX * bn_ctx = NULL; 2011#endif 2012 2013 if (s->state == SSL3_ST_CW_KEY_EXCH_A) 2014 { 2015 d=(unsigned char *)s->init_buf->data; 2016 p= &(d[4]); 2017 2018 alg_k=s->s3->tmp.new_cipher->algorithm_mkey; 2019 2020 /* Fool emacs indentation */ 2021 if (0) {} 2022#ifndef OPENSSL_NO_RSA 2023 else if (alg_k & SSL_kRSA) 2024 { 2025 RSA *rsa; 2026 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; 2027 2028 if (s->session->sess_cert->peer_rsa_tmp != NULL) 2029 rsa=s->session->sess_cert->peer_rsa_tmp; 2030 else 2031 { 2032 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 2033 if ((pkey == NULL) || 2034 (pkey->type != EVP_PKEY_RSA) || 2035 (pkey->pkey.rsa == NULL)) 2036 { 2037 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 2038 goto err; 2039 } 2040 rsa=pkey->pkey.rsa; 2041 EVP_PKEY_free(pkey); 2042 } 2043 2044 tmp_buf[0]=s->client_version>>8; 2045 tmp_buf[1]=s->client_version&0xff; 2046 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0) 2047 goto err; 2048 2049 s->session->master_key_length=sizeof tmp_buf; 2050 2051 q=p; 2052 /* Fix buf for TLS and beyond */ 2053 if (s->version > SSL3_VERSION) 2054 p+=2; 2055 n=RSA_public_encrypt(sizeof tmp_buf, 2056 tmp_buf,p,rsa,RSA_PKCS1_PADDING); 2057#ifdef PKCS1_CHECK 2058 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++; 2059 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70; 2060#endif 2061 if (n <= 0) 2062 { 2063 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT); 2064 goto err; 2065 } 2066 2067 /* Fix buf for TLS and beyond */ 2068 if (s->version > SSL3_VERSION) 2069 { 2070 s2n(n,q); 2071 n+=2; 2072 } 2073 2074 s->session->master_key_length= 2075 s->method->ssl3_enc->generate_master_secret(s, 2076 s->session->master_key, 2077 tmp_buf,sizeof tmp_buf); 2078 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf); 2079 } 2080#endif 2081#ifndef OPENSSL_NO_KRB5 2082 else if (alg_k & SSL_kKRB5) 2083 { 2084 krb5_error_code krb5rc; 2085 KSSL_CTX *kssl_ctx = s->kssl_ctx; 2086 /* krb5_data krb5_ap_req; */ 2087 krb5_data *enc_ticket; 2088 krb5_data authenticator, *authp = NULL; 2089 EVP_CIPHER_CTX ciph_ctx; 2090 const EVP_CIPHER *enc = NULL; 2091 unsigned char iv[EVP_MAX_IV_LENGTH]; 2092 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; 2093 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH 2094 + EVP_MAX_IV_LENGTH]; 2095 int padl, outl = sizeof(epms); 2096 2097 EVP_CIPHER_CTX_init(&ciph_ctx); 2098 2099#ifdef KSSL_DEBUG 2100 printf("ssl3_send_client_key_exchange(%lx & %lx)\n", 2101 alg_k, SSL_kKRB5); 2102#endif /* KSSL_DEBUG */ 2103 2104 authp = NULL; 2105#ifdef KRB5SENDAUTH 2106 if (KRB5SENDAUTH) authp = &authenticator; 2107#endif /* KRB5SENDAUTH */ 2108 2109 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp, 2110 &kssl_err); 2111 enc = kssl_map_enc(kssl_ctx->enctype); 2112 if (enc == NULL) 2113 goto err; 2114#ifdef KSSL_DEBUG 2115 { 2116 printf("kssl_cget_tkt rtn %d\n", krb5rc); 2117 if (krb5rc && kssl_err.text) 2118 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text); 2119 } 2120#endif /* KSSL_DEBUG */ 2121 2122 if (krb5rc) 2123 { 2124 ssl3_send_alert(s,SSL3_AL_FATAL, 2125 SSL_AD_HANDSHAKE_FAILURE); 2126 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2127 kssl_err.reason); 2128 goto err; 2129 } 2130 2131 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ 2132 ** in place of RFC 2712 KerberosWrapper, as in: 2133 ** 2134 ** Send ticket (copy to *p, set n = length) 2135 ** n = krb5_ap_req.length; 2136 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length); 2137 ** if (krb5_ap_req.data) 2138 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req); 2139 ** 2140 ** Now using real RFC 2712 KerberosWrapper 2141 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>) 2142 ** Note: 2712 "opaque" types are here replaced 2143 ** with a 2-byte length followed by the value. 2144 ** Example: 2145 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms 2146 ** Where "xx xx" = length bytes. Shown here with 2147 ** optional authenticator omitted. 2148 */ 2149 2150 /* KerberosWrapper.Ticket */ 2151 s2n(enc_ticket->length,p); 2152 memcpy(p, enc_ticket->data, enc_ticket->length); 2153 p+= enc_ticket->length; 2154 n = enc_ticket->length + 2; 2155 2156 /* KerberosWrapper.Authenticator */ 2157 if (authp && authp->length) 2158 { 2159 s2n(authp->length,p); 2160 memcpy(p, authp->data, authp->length); 2161 p+= authp->length; 2162 n+= authp->length + 2; 2163 2164 free(authp->data); 2165 authp->data = NULL; 2166 authp->length = 0; 2167 } 2168 else 2169 { 2170 s2n(0,p);/* null authenticator length */ 2171 n+=2; 2172 } 2173 2174 tmp_buf[0]=s->client_version>>8; 2175 tmp_buf[1]=s->client_version&0xff; 2176 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0) 2177 goto err; 2178 2179 /* 20010420 VRS. Tried it this way; failed. 2180 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL); 2181 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx, 2182 ** kssl_ctx->length); 2183 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv); 2184 */ 2185 2186 memset(iv, 0, sizeof iv); /* per RFC 1510 */ 2187 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL, 2188 kssl_ctx->key,iv); 2189 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf, 2190 sizeof tmp_buf); 2191 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl); 2192 outl += padl; 2193 if (outl > (int)sizeof epms) 2194 { 2195 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); 2196 goto err; 2197 } 2198 EVP_CIPHER_CTX_cleanup(&ciph_ctx); 2199 2200 /* KerberosWrapper.EncryptedPreMasterSecret */ 2201 s2n(outl,p); 2202 memcpy(p, epms, outl); 2203 p+=outl; 2204 n+=outl + 2; 2205 2206 s->session->master_key_length= 2207 s->method->ssl3_enc->generate_master_secret(s, 2208 s->session->master_key, 2209 tmp_buf, sizeof tmp_buf); 2210 2211 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf); 2212 OPENSSL_cleanse(epms, outl); 2213 } 2214#endif 2215#ifndef OPENSSL_NO_DH 2216 else if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) 2217 { 2218 DH *dh_srvr,*dh_clnt; 2219 2220 if (s->session->sess_cert == NULL) 2221 { 2222 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 2223 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE); 2224 goto err; 2225 } 2226 2227 if (s->session->sess_cert->peer_dh_tmp != NULL) 2228 dh_srvr=s->session->sess_cert->peer_dh_tmp; 2229 else 2230 { 2231 /* we get them from the cert */ 2232 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); 2233 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS); 2234 goto err; 2235 } 2236 2237 /* generate a new random key */ 2238 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL) 2239 { 2240 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 2241 goto err; 2242 } 2243 if (!DH_generate_key(dh_clnt)) 2244 { 2245 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 2246 goto err; 2247 } 2248 2249 /* use the 'p' output buffer for the DH key, but 2250 * make sure to clear it out afterwards */ 2251 2252 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt); 2253 2254 if (n <= 0) 2255 { 2256 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 2257 goto err; 2258 } 2259 2260 /* generate master key from the result */ 2261 s->session->master_key_length= 2262 s->method->ssl3_enc->generate_master_secret(s, 2263 s->session->master_key,p,n); 2264 /* clean up */ 2265 memset(p,0,n); 2266 2267 /* send off the data */ 2268 n=BN_num_bytes(dh_clnt->pub_key); 2269 s2n(n,p); 2270 BN_bn2bin(dh_clnt->pub_key,p); 2271 n+=2; 2272 2273 DH_free(dh_clnt); 2274 2275 /* perhaps clean things up a bit EAY EAY EAY EAY*/ 2276 } 2277#endif 2278 2279#ifndef OPENSSL_NO_ECDH 2280 else if (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)) 2281 { 2282 const EC_GROUP *srvr_group = NULL; 2283 EC_KEY *tkey; 2284 int ecdh_clnt_cert = 0; 2285 int field_size = 0; 2286 2287 /* Did we send out the client's 2288 * ECDH share for use in premaster 2289 * computation as part of client certificate? 2290 * If so, set ecdh_clnt_cert to 1. 2291 */ 2292 if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL)) 2293 { 2294 /* XXX: For now, we do not support client 2295 * authentication using ECDH certificates. 2296 * To add such support, one needs to add 2297 * code that checks for appropriate 2298 * conditions and sets ecdh_clnt_cert to 1. 2299 * For example, the cert have an ECC 2300 * key on the same curve as the server's 2301 * and the key should be authorized for 2302 * key agreement. 2303 * 2304 * One also needs to add code in ssl3_connect 2305 * to skip sending the certificate verify 2306 * message. 2307 * 2308 * if ((s->cert->key->privatekey != NULL) && 2309 * (s->cert->key->privatekey->type == 2310 * EVP_PKEY_EC) && ...) 2311 * ecdh_clnt_cert = 1; 2312 */ 2313 } 2314 2315 if (s->session->sess_cert->peer_ecdh_tmp != NULL) 2316 { 2317 tkey = s->session->sess_cert->peer_ecdh_tmp; 2318 } 2319 else 2320 { 2321 /* Get the Server Public Key from Cert */ 2322 srvr_pub_pkey = X509_get_pubkey(s->session-> \ 2323 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509); 2324 if ((srvr_pub_pkey == NULL) || 2325 (srvr_pub_pkey->type != EVP_PKEY_EC) || 2326 (srvr_pub_pkey->pkey.ec == NULL)) 2327 { 2328 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2329 ERR_R_INTERNAL_ERROR); 2330 goto err; 2331 } 2332 2333 tkey = srvr_pub_pkey->pkey.ec; 2334 } 2335 2336 srvr_group = EC_KEY_get0_group(tkey); 2337 srvr_ecpoint = EC_KEY_get0_public_key(tkey); 2338 2339 if ((srvr_group == NULL) || (srvr_ecpoint == NULL)) 2340 { 2341 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2342 ERR_R_INTERNAL_ERROR); 2343 goto err; 2344 } 2345 2346 if ((clnt_ecdh=EC_KEY_new()) == NULL) 2347 { 2348 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2349 goto err; 2350 } 2351 2352 if (!EC_KEY_set_group(clnt_ecdh, srvr_group)) 2353 { 2354 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB); 2355 goto err; 2356 } 2357 if (ecdh_clnt_cert) 2358 { 2359 /* Reuse key info from our certificate 2360 * We only need our private key to perform 2361 * the ECDH computation. 2362 */ 2363 const BIGNUM *priv_key; 2364 tkey = s->cert->key->privatekey->pkey.ec; 2365 priv_key = EC_KEY_get0_private_key(tkey); 2366 if (priv_key == NULL) 2367 { 2368 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2369 goto err; 2370 } 2371 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key)) 2372 { 2373 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB); 2374 goto err; 2375 } 2376 } 2377 else 2378 { 2379 /* Generate a new ECDH key pair */ 2380 if (!(EC_KEY_generate_key(clnt_ecdh))) 2381 { 2382 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB); 2383 goto err; 2384 } 2385 } 2386 2387 /* use the 'p' output buffer for the ECDH key, but 2388 * make sure to clear it out afterwards 2389 */ 2390 2391 field_size = EC_GROUP_get_degree(srvr_group); 2392 if (field_size <= 0) 2393 { 2394 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2395 ERR_R_ECDH_LIB); 2396 goto err; 2397 } 2398 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL); 2399 if (n <= 0) 2400 { 2401 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2402 ERR_R_ECDH_LIB); 2403 goto err; 2404 } 2405 2406 /* generate master key from the result */ 2407 s->session->master_key_length = s->method->ssl3_enc \ 2408 -> generate_master_secret(s, 2409 s->session->master_key, 2410 p, n); 2411 2412 memset(p, 0, n); /* clean up */ 2413 2414 if (ecdh_clnt_cert) 2415 { 2416 /* Send empty client key exch message */ 2417 n = 0; 2418 } 2419 else 2420 { 2421 /* First check the size of encoding and 2422 * allocate memory accordingly. 2423 */ 2424 encoded_pt_len = 2425 EC_POINT_point2oct(srvr_group, 2426 EC_KEY_get0_public_key(clnt_ecdh), 2427 POINT_CONVERSION_UNCOMPRESSED, 2428 NULL, 0, NULL); 2429 2430 encodedPoint = (unsigned char *) 2431 OPENSSL_malloc(encoded_pt_len * 2432 sizeof(unsigned char)); 2433 bn_ctx = BN_CTX_new(); 2434 if ((encodedPoint == NULL) || 2435 (bn_ctx == NULL)) 2436 { 2437 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2438 goto err; 2439 } 2440 2441 /* Encode the public key */ 2442 n = EC_POINT_point2oct(srvr_group, 2443 EC_KEY_get0_public_key(clnt_ecdh), 2444 POINT_CONVERSION_UNCOMPRESSED, 2445 encodedPoint, encoded_pt_len, bn_ctx); 2446 2447 *p = n; /* length of encoded point */ 2448 /* Encoded point will be copied here */ 2449 p += 1; 2450 /* copy the point */ 2451 memcpy((unsigned char *)p, encodedPoint, n); 2452 /* increment n to account for length field */ 2453 n += 1; 2454 } 2455 2456 /* Free allocated memory */ 2457 BN_CTX_free(bn_ctx); 2458 if (encodedPoint != NULL) OPENSSL_free(encodedPoint); 2459 if (clnt_ecdh != NULL) 2460 EC_KEY_free(clnt_ecdh); 2461 EVP_PKEY_free(srvr_pub_pkey); 2462 } 2463#endif /* !OPENSSL_NO_ECDH */ 2464 else if (alg_k & SSL_kGOST) 2465 { 2466 /* GOST key exchange message creation */ 2467 EVP_PKEY_CTX *pkey_ctx; 2468 X509 *peer_cert; 2469 size_t msglen; 2470 unsigned int md_len; 2471 int keytype; 2472 unsigned char premaster_secret[32],shared_ukm[32], tmp[256]; 2473 EVP_MD_CTX *ukm_hash; 2474 EVP_PKEY *pub_key; 2475 2476 /* Get server sertificate PKEY and create ctx from it */ 2477 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST01)].x509; 2478 if (!peer_cert) 2479 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST94)].x509; 2480 if (!peer_cert) { 2481 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER); 2482 goto err; 2483 } 2484 2485 pkey_ctx=EVP_PKEY_CTX_new(pub_key=X509_get_pubkey(peer_cert),NULL); 2486 /* If we have send a certificate, and certificate key 2487 2488 * parameters match those of server certificate, use 2489 * certificate key for key exchange 2490 */ 2491 2492 /* Otherwise, generate ephemeral key pair */ 2493 2494 EVP_PKEY_encrypt_init(pkey_ctx); 2495 /* Generate session key */ 2496 RAND_bytes(premaster_secret,32); 2497 /* If we have client certificate, use its secret as peer key */ 2498 if (s->s3->tmp.cert_req && s->cert->key->privatekey) { 2499 if (EVP_PKEY_derive_set_peer(pkey_ctx,s->cert->key->privatekey) <=0) { 2500 /* If there was an error - just ignore it. Ephemeral key 2501 * would be used 2502 */ 2503 ERR_clear_error(); 2504 } 2505 } 2506 /* Compute shared IV and store it in algorithm-specific 2507 * context data */ 2508 ukm_hash = EVP_MD_CTX_create(); 2509 EVP_DigestInit(ukm_hash,EVP_get_digestbynid(NID_id_GostR3411_94)); 2510 EVP_DigestUpdate(ukm_hash,s->s3->client_random,SSL3_RANDOM_SIZE); 2511 EVP_DigestUpdate(ukm_hash,s->s3->server_random,SSL3_RANDOM_SIZE); 2512 EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len); 2513 EVP_MD_CTX_destroy(ukm_hash); 2514 if (EVP_PKEY_CTX_ctrl(pkey_ctx,-1,EVP_PKEY_OP_ENCRYPT,EVP_PKEY_CTRL_SET_IV, 2515 8,shared_ukm)<0) { 2516 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2517 SSL_R_LIBRARY_BUG); 2518 goto err; 2519 } 2520 /* Make GOST keytransport blob message */ 2521 /*Encapsulate it into sequence */ 2522 *(p++)=V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED; 2523 msglen=255; 2524 if (EVP_PKEY_encrypt(pkey_ctx,tmp,&msglen,premaster_secret,32)<0) { 2525 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2526 SSL_R_LIBRARY_BUG); 2527 goto err; 2528 } 2529 if (msglen >= 0x80) 2530 { 2531 *(p++)=0x81; 2532 *(p++)= msglen & 0xff; 2533 n=msglen+3; 2534 } 2535 else 2536 { 2537 *(p++)= msglen & 0xff; 2538 n=msglen+2; 2539 } 2540 memcpy(p, tmp, msglen); 2541 /* Check if pubkey from client certificate was used */ 2542 if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0) 2543 { 2544 /* Set flag "skip certificate verify" */ 2545 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY; 2546 } 2547 EVP_PKEY_CTX_free(pkey_ctx); 2548 s->session->master_key_length= 2549 s->method->ssl3_enc->generate_master_secret(s, 2550 s->session->master_key,premaster_secret,32); 2551 EVP_PKEY_free(pub_key); 2552 2553 } 2554#ifndef OPENSSL_NO_PSK 2555 else if (alg_k & SSL_kPSK) 2556 { 2557 char identity[PSK_MAX_IDENTITY_LEN]; 2558 unsigned char *t = NULL; 2559 unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4]; 2560 unsigned int pre_ms_len = 0, psk_len = 0; 2561 int psk_err = 1; 2562 2563 n = 0; 2564 if (s->psk_client_callback == NULL) 2565 { 2566 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2567 SSL_R_PSK_NO_CLIENT_CB); 2568 goto err; 2569 } 2570 2571 psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint, 2572 identity, PSK_MAX_IDENTITY_LEN, 2573 psk_or_pre_ms, sizeof(psk_or_pre_ms)); 2574 if (psk_len > PSK_MAX_PSK_LEN) 2575 { 2576 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2577 ERR_R_INTERNAL_ERROR); 2578 goto psk_err; 2579 } 2580 else if (psk_len == 0) 2581 { 2582 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2583 SSL_R_PSK_IDENTITY_NOT_FOUND); 2584 goto psk_err; 2585 } 2586 2587 /* create PSK pre_master_secret */ 2588 pre_ms_len = 2+psk_len+2+psk_len; 2589 t = psk_or_pre_ms; 2590 memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len); 2591 s2n(psk_len, t); 2592 memset(t, 0, psk_len); 2593 t+=psk_len; 2594 s2n(psk_len, t); 2595 2596 if (s->session->psk_identity_hint != NULL) 2597 OPENSSL_free(s->session->psk_identity_hint); 2598 s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint); 2599 if (s->ctx->psk_identity_hint != NULL && 2600 s->session->psk_identity_hint == NULL) 2601 { 2602 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2603 ERR_R_MALLOC_FAILURE); 2604 goto psk_err; 2605 } 2606 2607 if (s->session->psk_identity != NULL) 2608 OPENSSL_free(s->session->psk_identity); 2609 s->session->psk_identity = BUF_strdup(identity); 2610 if (s->session->psk_identity == NULL) 2611 { 2612 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2613 ERR_R_MALLOC_FAILURE); 2614 goto psk_err; 2615 } 2616 2617 s->session->master_key_length = 2618 s->method->ssl3_enc->generate_master_secret(s, 2619 s->session->master_key, 2620 psk_or_pre_ms, pre_ms_len); 2621 n = strlen(identity); 2622 s2n(n, p); 2623 memcpy(p, identity, n); 2624 n+=2; 2625 psk_err = 0; 2626 psk_err: 2627 OPENSSL_cleanse(identity, PSK_MAX_IDENTITY_LEN); 2628 OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms)); 2629 if (psk_err != 0) 2630 { 2631 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); 2632 goto err; 2633 } 2634 } 2635#endif 2636 else 2637 { 2638 ssl3_send_alert(s, SSL3_AL_FATAL, 2639 SSL_AD_HANDSHAKE_FAILURE); 2640 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2641 ERR_R_INTERNAL_ERROR); 2642 goto err; 2643 } 2644 2645 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE; 2646 l2n3(n,d); 2647 2648 s->state=SSL3_ST_CW_KEY_EXCH_B; 2649 /* number of bytes to write */ 2650 s->init_num=n+4; 2651 s->init_off=0; 2652 } 2653 2654 /* SSL3_ST_CW_KEY_EXCH_B */ 2655 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 2656err: 2657#ifndef OPENSSL_NO_ECDH 2658 BN_CTX_free(bn_ctx); 2659 if (encodedPoint != NULL) OPENSSL_free(encodedPoint); 2660 if (clnt_ecdh != NULL) 2661 EC_KEY_free(clnt_ecdh); 2662 EVP_PKEY_free(srvr_pub_pkey); 2663#endif 2664 return(-1); 2665 } 2666 2667int ssl3_send_client_verify(SSL *s) 2668 { 2669 unsigned char *p,*d; 2670 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH]; 2671 EVP_PKEY *pkey; 2672 EVP_PKEY_CTX *pctx=NULL; 2673#ifndef OPENSSL_NO_RSA 2674 unsigned u=0; 2675#endif 2676 unsigned long n; 2677 int j; 2678 2679 if (s->state == SSL3_ST_CW_CERT_VRFY_A) 2680 { 2681 d=(unsigned char *)s->init_buf->data; 2682 p= &(d[4]); 2683 pkey=s->cert->key->privatekey; 2684/* Create context from key and test if sha1 is allowed as digest */ 2685 pctx = EVP_PKEY_CTX_new(pkey,NULL); 2686 EVP_PKEY_sign_init(pctx); 2687 if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1())>0) 2688 { 2689 s->method->ssl3_enc->cert_verify_mac(s, 2690 NID_sha1, 2691 &(data[MD5_DIGEST_LENGTH])); 2692 } 2693 else 2694 { 2695 ERR_clear_error(); 2696 } 2697#ifndef OPENSSL_NO_RSA 2698 if (pkey->type == EVP_PKEY_RSA) 2699 { 2700 s->method->ssl3_enc->cert_verify_mac(s, 2701 NID_md5, 2702 &(data[0])); 2703 if (RSA_sign(NID_md5_sha1, data, 2704 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH, 2705 &(p[2]), &u, pkey->pkey.rsa) <= 0 ) 2706 { 2707 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB); 2708 goto err; 2709 } 2710 s2n(u,p); 2711 n=u+2; 2712 } 2713 else 2714#endif 2715#ifndef OPENSSL_NO_DSA 2716 if (pkey->type == EVP_PKEY_DSA) 2717 { 2718 if (!DSA_sign(pkey->save_type, 2719 &(data[MD5_DIGEST_LENGTH]), 2720 SHA_DIGEST_LENGTH,&(p[2]), 2721 (unsigned int *)&j,pkey->pkey.dsa)) 2722 { 2723 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB); 2724 goto err; 2725 } 2726 s2n(j,p); 2727 n=j+2; 2728 } 2729 else 2730#endif 2731#ifndef OPENSSL_NO_ECDSA 2732 if (pkey->type == EVP_PKEY_EC) 2733 { 2734 if (!ECDSA_sign(pkey->save_type, 2735 &(data[MD5_DIGEST_LENGTH]), 2736 SHA_DIGEST_LENGTH,&(p[2]), 2737 (unsigned int *)&j,pkey->pkey.ec)) 2738 { 2739 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, 2740 ERR_R_ECDSA_LIB); 2741 goto err; 2742 } 2743 s2n(j,p); 2744 n=j+2; 2745 } 2746 else 2747#endif 2748 if (pkey->type == NID_id_GostR3410_94 || pkey->type == NID_id_GostR3410_2001) 2749 { 2750 unsigned char signbuf[64]; 2751 int i; 2752 size_t sigsize=64; 2753 s->method->ssl3_enc->cert_verify_mac(s, 2754 NID_id_GostR3411_94, 2755 data); 2756 if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) { 2757 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, 2758 ERR_R_INTERNAL_ERROR); 2759 goto err; 2760 } 2761 for (i=63,j=0; i>=0; j++, i--) { 2762 p[2+j]=signbuf[i]; 2763 } 2764 s2n(j,p); 2765 n=j+2; 2766 } 2767 else 2768 { 2769 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR); 2770 goto err; 2771 } 2772 *(d++)=SSL3_MT_CERTIFICATE_VERIFY; 2773 l2n3(n,d); 2774 2775 s->state=SSL3_ST_CW_CERT_VRFY_B; 2776 s->init_num=(int)n+4; 2777 s->init_off=0; 2778 } 2779 EVP_PKEY_CTX_free(pctx); 2780 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 2781err: 2782 EVP_PKEY_CTX_free(pctx); 2783 return(-1); 2784 } 2785 2786int ssl3_send_client_certificate(SSL *s) 2787 { 2788 X509 *x509=NULL; 2789 EVP_PKEY *pkey=NULL; 2790 int i; 2791 unsigned long l; 2792 2793 if (s->state == SSL3_ST_CW_CERT_A) 2794 { 2795 if ((s->cert == NULL) || 2796 (s->cert->key->x509 == NULL) || 2797 (s->cert->key->privatekey == NULL)) 2798 s->state=SSL3_ST_CW_CERT_B; 2799 else 2800 s->state=SSL3_ST_CW_CERT_C; 2801 } 2802 2803 /* We need to get a client cert */ 2804 if (s->state == SSL3_ST_CW_CERT_B) 2805 { 2806 /* If we get an error, we need to 2807 * ssl->rwstate=SSL_X509_LOOKUP; return(-1); 2808 * We then get retied later */ 2809 i=0; 2810 i = ssl_do_client_cert_cb(s, &x509, &pkey); 2811 if (i < 0) 2812 { 2813 s->rwstate=SSL_X509_LOOKUP; 2814 return(-1); 2815 } 2816 s->rwstate=SSL_NOTHING; 2817 if ((i == 1) && (pkey != NULL) && (x509 != NULL)) 2818 { 2819 s->state=SSL3_ST_CW_CERT_B; 2820 if ( !SSL_use_certificate(s,x509) || 2821 !SSL_use_PrivateKey(s,pkey)) 2822 i=0; 2823 } 2824 else if (i == 1) 2825 { 2826 i=0; 2827 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); 2828 } 2829 2830 if (x509 != NULL) X509_free(x509); 2831 if (pkey != NULL) EVP_PKEY_free(pkey); 2832 if (i == 0) 2833 { 2834 if (s->version == SSL3_VERSION) 2835 { 2836 s->s3->tmp.cert_req=0; 2837 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE); 2838 return(1); 2839 } 2840 else 2841 { 2842 s->s3->tmp.cert_req=2; 2843 } 2844 } 2845 2846 /* Ok, we have a cert */ 2847 s->state=SSL3_ST_CW_CERT_C; 2848 } 2849 2850 if (s->state == SSL3_ST_CW_CERT_C) 2851 { 2852 s->state=SSL3_ST_CW_CERT_D; 2853 l=ssl3_output_cert_chain(s, 2854 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509); 2855 s->init_num=(int)l; 2856 s->init_off=0; 2857 } 2858 /* SSL3_ST_CW_CERT_D */ 2859 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 2860 } 2861 2862#define has_bits(i,m) (((i)&(m)) == (m)) 2863 2864int ssl3_check_cert_and_algorithm(SSL *s) 2865 { 2866 int i,idx; 2867 long alg_k,alg_a; 2868 EVP_PKEY *pkey=NULL; 2869 SESS_CERT *sc; 2870#ifndef OPENSSL_NO_RSA 2871 RSA *rsa; 2872#endif 2873#ifndef OPENSSL_NO_DH 2874 DH *dh; 2875#endif 2876 2877 alg_k=s->s3->tmp.new_cipher->algorithm_mkey; 2878 alg_a=s->s3->tmp.new_cipher->algorithm_auth; 2879 2880 /* we don't have a certificate */ 2881 if ((alg_a & (SSL_aDH|SSL_aNULL|SSL_aKRB5)) || (alg_k & SSL_kPSK)) 2882 return(1); 2883 2884 sc=s->session->sess_cert; 2885 if (sc == NULL) 2886 { 2887 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR); 2888 goto err; 2889 } 2890 2891#ifndef OPENSSL_NO_RSA 2892 rsa=s->session->sess_cert->peer_rsa_tmp; 2893#endif 2894#ifndef OPENSSL_NO_DH 2895 dh=s->session->sess_cert->peer_dh_tmp; 2896#endif 2897 2898 /* This is the passed certificate */ 2899 2900 idx=sc->peer_cert_type; 2901#ifndef OPENSSL_NO_ECDH 2902 if (idx == SSL_PKEY_ECC) 2903 { 2904 if (ssl_check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509, 2905 s->s3->tmp.new_cipher) == 0) 2906 { /* check failed */ 2907 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT); 2908 goto f_err; 2909 } 2910 else 2911 { 2912 return 1; 2913 } 2914 } 2915#endif 2916 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509); 2917 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey); 2918 EVP_PKEY_free(pkey); 2919 2920 2921 /* Check that we have a certificate if we require one */ 2922 if ((alg_a & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN)) 2923 { 2924 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT); 2925 goto f_err; 2926 } 2927#ifndef OPENSSL_NO_DSA 2928 else if ((alg_a & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN)) 2929 { 2930 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT); 2931 goto f_err; 2932 } 2933#endif 2934#ifndef OPENSSL_NO_RSA 2935 if ((alg_k & SSL_kRSA) && 2936 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL))) 2937 { 2938 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT); 2939 goto f_err; 2940 } 2941#endif 2942#ifndef OPENSSL_NO_DH 2943 if ((alg_k & SSL_kEDH) && 2944 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL))) 2945 { 2946 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY); 2947 goto f_err; 2948 } 2949 else if ((alg_k & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA)) 2950 { 2951 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT); 2952 goto f_err; 2953 } 2954#ifndef OPENSSL_NO_DSA 2955 else if ((alg_k & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA)) 2956 { 2957 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT); 2958 goto f_err; 2959 } 2960#endif 2961#endif 2962 2963 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP)) 2964 { 2965#ifndef OPENSSL_NO_RSA 2966 if (alg_k & SSL_kRSA) 2967 { 2968 if (rsa == NULL 2969 || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) 2970 { 2971 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY); 2972 goto f_err; 2973 } 2974 } 2975 else 2976#endif 2977#ifndef OPENSSL_NO_DH 2978 if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) 2979 { 2980 if (dh == NULL 2981 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) 2982 { 2983 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY); 2984 goto f_err; 2985 } 2986 } 2987 else 2988#endif 2989 { 2990 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE); 2991 goto f_err; 2992 } 2993 } 2994 return(1); 2995f_err: 2996 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); 2997err: 2998 return(0); 2999 } 3000 3001/* Check to see if handshake is full or resumed. Usually this is just a 3002 * case of checking to see if a cache hit has occurred. In the case of 3003 * session tickets we have to check the next message to be sure. 3004 */ 3005 3006#ifndef OPENSSL_NO_TLSEXT 3007int ssl3_check_finished(SSL *s) 3008 { 3009 int ok; 3010 long n; 3011 /* If we have no ticket it cannot be a resumed session. */ 3012 if (!s->session->tlsext_tick) 3013 return 1; 3014 /* this function is called when we really expect a Certificate 3015 * message, so permit appropriate message length */ 3016 n=s->method->ssl_get_message(s, 3017 SSL3_ST_CR_CERT_A, 3018 SSL3_ST_CR_CERT_B, 3019 -1, 3020 s->max_cert_list, 3021 &ok); 3022 if (!ok) return((int)n); 3023 s->s3->tmp.reuse_message = 1; 3024 if ((s->s3->tmp.message_type == SSL3_MT_FINISHED) 3025 || (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET)) 3026 return 2; 3027 3028 return 1; 3029 } 3030#endif 3031 3032int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey) 3033 { 3034 int i = 0; 3035#ifndef OPENSSL_NO_ENGINE 3036 if (s->ctx->client_cert_engine) 3037 { 3038 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s, 3039 SSL_get_client_CA_list(s), 3040 px509, ppkey, NULL, NULL, NULL); 3041 if (i != 0) 3042 return i; 3043 } 3044#endif 3045 if (s->ctx->client_cert_cb) 3046 i = s->ctx->client_cert_cb(s,px509,ppkey); 3047 return i; 3048 } 3049