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 { 284 s->state=SSL3_ST_CR_FINISHED_A; 285#ifndef OPENSSL_NO_TLSEXT 286 if (s->tlsext_ticket_expected) 287 { 288 /* receive renewed session ticket */ 289 s->state=SSL3_ST_CR_SESSION_TICKET_A; 290 } 291#endif 292 } 293 else 294 s->state=SSL3_ST_CR_CERT_A; 295 s->init_num=0; 296 break; 297 298 case SSL3_ST_CR_CERT_A: 299 case SSL3_ST_CR_CERT_B: 300#ifndef OPENSSL_NO_TLSEXT 301 ret=ssl3_check_finished(s); 302 if (ret <= 0) goto end; 303 if (ret == 2) 304 { 305 s->hit = 1; 306 if (s->tlsext_ticket_expected) 307 s->state=SSL3_ST_CR_SESSION_TICKET_A; 308 else 309 s->state=SSL3_ST_CR_FINISHED_A; 310 s->init_num=0; 311 break; 312 } 313#endif 314 /* Check if it is anon DH/ECDH */ 315 /* or PSK */ 316 if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) && 317 !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) 318 { 319 ret=ssl3_get_server_certificate(s); 320 if (ret <= 0) goto end; 321#ifndef OPENSSL_NO_TLSEXT 322 if (s->tlsext_status_expected) 323 s->state=SSL3_ST_CR_CERT_STATUS_A; 324 else 325 s->state=SSL3_ST_CR_KEY_EXCH_A; 326 } 327 else 328 { 329 skip = 1; 330 s->state=SSL3_ST_CR_KEY_EXCH_A; 331 } 332#else 333 } 334 else 335 skip=1; 336 337 s->state=SSL3_ST_CR_KEY_EXCH_A; 338#endif 339 s->init_num=0; 340 break; 341 342 case SSL3_ST_CR_KEY_EXCH_A: 343 case SSL3_ST_CR_KEY_EXCH_B: 344 ret=ssl3_get_key_exchange(s); 345 if (ret <= 0) goto end; 346 s->state=SSL3_ST_CR_CERT_REQ_A; 347 s->init_num=0; 348 349 /* at this point we check that we have the 350 * required stuff from the server */ 351 if (!ssl3_check_cert_and_algorithm(s)) 352 { 353 ret= -1; 354 goto end; 355 } 356 break; 357 358 case SSL3_ST_CR_CERT_REQ_A: 359 case SSL3_ST_CR_CERT_REQ_B: 360 ret=ssl3_get_certificate_request(s); 361 if (ret <= 0) goto end; 362 s->state=SSL3_ST_CR_SRVR_DONE_A; 363 s->init_num=0; 364 break; 365 366 case SSL3_ST_CR_SRVR_DONE_A: 367 case SSL3_ST_CR_SRVR_DONE_B: 368 ret=ssl3_get_server_done(s); 369 if (ret <= 0) goto end; 370 if (s->s3->tmp.cert_req) 371 s->state=SSL3_ST_CW_CERT_A; 372 else 373 s->state=SSL3_ST_CW_KEY_EXCH_A; 374 s->init_num=0; 375 376 break; 377 378 case SSL3_ST_CW_CERT_A: 379 case SSL3_ST_CW_CERT_B: 380 case SSL3_ST_CW_CERT_C: 381 case SSL3_ST_CW_CERT_D: 382 ret=ssl3_send_client_certificate(s); 383 if (ret <= 0) goto end; 384 s->state=SSL3_ST_CW_KEY_EXCH_A; 385 s->init_num=0; 386 break; 387 388 case SSL3_ST_CW_KEY_EXCH_A: 389 case SSL3_ST_CW_KEY_EXCH_B: 390 ret=ssl3_send_client_key_exchange(s); 391 if (ret <= 0) goto end; 392 /* EAY EAY EAY need to check for DH fix cert 393 * sent back */ 394 /* For TLS, cert_req is set to 2, so a cert chain 395 * of nothing is sent, but no verify packet is sent */ 396 /* XXX: For now, we do not support client 397 * authentication in ECDH cipher suites with 398 * ECDH (rather than ECDSA) certificates. 399 * We need to skip the certificate verify 400 * message when client's ECDH public key is sent 401 * inside the client certificate. 402 */ 403 if (s->s3->tmp.cert_req == 1) 404 { 405 s->state=SSL3_ST_CW_CERT_VRFY_A; 406 } 407 else 408 { 409 s->state=SSL3_ST_CW_CHANGE_A; 410 s->s3->change_cipher_spec=0; 411 } 412 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) 413 { 414 s->state=SSL3_ST_CW_CHANGE_A; 415 s->s3->change_cipher_spec=0; 416 } 417 418 s->init_num=0; 419 break; 420 421 case SSL3_ST_CW_CERT_VRFY_A: 422 case SSL3_ST_CW_CERT_VRFY_B: 423 ret=ssl3_send_client_verify(s); 424 if (ret <= 0) goto end; 425 s->state=SSL3_ST_CW_CHANGE_A; 426 s->init_num=0; 427 s->s3->change_cipher_spec=0; 428 break; 429 430 case SSL3_ST_CW_CHANGE_A: 431 case SSL3_ST_CW_CHANGE_B: 432 ret=ssl3_send_change_cipher_spec(s, 433 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B); 434 if (ret <= 0) goto end; 435 s->state=SSL3_ST_CW_FINISHED_A; 436 s->init_num=0; 437 438 s->session->cipher=s->s3->tmp.new_cipher; 439#ifdef OPENSSL_NO_COMP 440 s->session->compress_meth=0; 441#else 442 if (s->s3->tmp.new_compression == NULL) 443 s->session->compress_meth=0; 444 else 445 s->session->compress_meth= 446 s->s3->tmp.new_compression->id; 447#endif 448 if (!s->method->ssl3_enc->setup_key_block(s)) 449 { 450 ret= -1; 451 goto end; 452 } 453 454 if (!s->method->ssl3_enc->change_cipher_state(s, 455 SSL3_CHANGE_CIPHER_CLIENT_WRITE)) 456 { 457 ret= -1; 458 goto end; 459 } 460 461 break; 462 463 case SSL3_ST_CW_FINISHED_A: 464 case SSL3_ST_CW_FINISHED_B: 465 ret=ssl3_send_finished(s, 466 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B, 467 s->method->ssl3_enc->client_finished_label, 468 s->method->ssl3_enc->client_finished_label_len); 469 if (ret <= 0) goto end; 470 s->s3->flags |= SSL3_FLAGS_CCS_OK; 471 s->state=SSL3_ST_CW_FLUSH; 472 473 /* clear flags */ 474 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER; 475 if (s->hit) 476 { 477 s->s3->tmp.next_state=SSL_ST_OK; 478 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED) 479 { 480 s->state=SSL_ST_OK; 481 s->s3->flags|=SSL3_FLAGS_POP_BUFFER; 482 s->s3->delay_buf_pop_ret=0; 483 } 484 } 485 else 486 { 487#ifndef OPENSSL_NO_TLSEXT 488 /* Allow NewSessionTicket if ticket expected */ 489 if (s->tlsext_ticket_expected) 490 s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A; 491 else 492#endif 493 494 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A; 495 } 496 s->init_num=0; 497 break; 498 499#ifndef OPENSSL_NO_TLSEXT 500 case SSL3_ST_CR_SESSION_TICKET_A: 501 case SSL3_ST_CR_SESSION_TICKET_B: 502 ret=ssl3_get_new_session_ticket(s); 503 if (ret <= 0) goto end; 504 s->state=SSL3_ST_CR_FINISHED_A; 505 s->init_num=0; 506 break; 507 508 case SSL3_ST_CR_CERT_STATUS_A: 509 case SSL3_ST_CR_CERT_STATUS_B: 510 ret=ssl3_get_cert_status(s); 511 if (ret <= 0) goto end; 512 s->state=SSL3_ST_CR_KEY_EXCH_A; 513 s->init_num=0; 514 break; 515#endif 516 517 case SSL3_ST_CR_FINISHED_A: 518 case SSL3_ST_CR_FINISHED_B: 519 520 s->s3->flags |= SSL3_FLAGS_CCS_OK; 521 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A, 522 SSL3_ST_CR_FINISHED_B); 523 if (ret <= 0) goto end; 524 525 if (s->hit) 526 s->state=SSL3_ST_CW_CHANGE_A; 527 else 528 s->state=SSL_ST_OK; 529 s->init_num=0; 530 break; 531 532 case SSL3_ST_CW_FLUSH: 533 s->rwstate=SSL_WRITING; 534 if (BIO_flush(s->wbio) <= 0) 535 { 536 ret= -1; 537 goto end; 538 } 539 s->rwstate=SSL_NOTHING; 540 s->state=s->s3->tmp.next_state; 541 break; 542 543 case SSL_ST_OK: 544 /* clean a few things up */ 545 ssl3_cleanup_key_block(s); 546 547 if (s->init_buf != NULL) 548 { 549 BUF_MEM_free(s->init_buf); 550 s->init_buf=NULL; 551 } 552 553 /* If we are not 'joining' the last two packets, 554 * remove the buffering now */ 555 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER)) 556 ssl_free_wbio_buffer(s); 557 /* else do it later in ssl3_write */ 558 559 s->init_num=0; 560 s->new_session=0; 561 562 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT); 563 if (s->hit) s->ctx->stats.sess_hit++; 564 565 ret=1; 566 /* s->server=0; */ 567 s->handshake_func=ssl3_connect; 568 s->ctx->stats.sess_connect_good++; 569 570 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1); 571 572 goto end; 573 /* break; */ 574 575 default: 576 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE); 577 ret= -1; 578 goto end; 579 /* break; */ 580 } 581 582 /* did we do anything */ 583 if (!s->s3->tmp.reuse_message && !skip) 584 { 585 if (s->debug) 586 { 587 if ((ret=BIO_flush(s->wbio)) <= 0) 588 goto end; 589 } 590 591 if ((cb != NULL) && (s->state != state)) 592 { 593 new_state=s->state; 594 s->state=state; 595 cb(s,SSL_CB_CONNECT_LOOP,1); 596 s->state=new_state; 597 } 598 } 599 skip=0; 600 } 601end: 602 s->in_handshake--; 603 if (buf != NULL) 604 BUF_MEM_free(buf); 605 if (cb != NULL) 606 cb(s,SSL_CB_CONNECT_EXIT,ret); 607 return(ret); 608 } 609 610 611int ssl3_client_hello(SSL *s) 612 { 613 unsigned char *buf; 614 unsigned char *p,*d; 615 int i; 616 unsigned long Time,l; 617#ifndef OPENSSL_NO_COMP 618 int j; 619 SSL_COMP *comp; 620#endif 621 622 buf=(unsigned char *)s->init_buf->data; 623 if (s->state == SSL3_ST_CW_CLNT_HELLO_A) 624 { 625 SSL_SESSION *sess = s->session; 626 if ((sess == NULL) || 627 (sess->ssl_version != s->version) || 628#ifdef OPENSSL_NO_TLSEXT 629 !sess->session_id_length || 630#else 631 (!sess->session_id_length && !sess->tlsext_tick) || 632#endif 633 (sess->not_resumable)) 634 { 635 if (!ssl_get_new_session(s,0)) 636 goto err; 637 } 638 /* else use the pre-loaded session */ 639 640 p=s->s3->client_random; 641 Time=(unsigned long)time(NULL); /* Time */ 642 l2n(Time,p); 643 if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0) 644 goto err; 645 646 /* Do the message type and length last */ 647 d=p= &(buf[4]); 648 649 *(p++)=s->version>>8; 650 *(p++)=s->version&0xff; 651 s->client_version=s->version; 652 653 /* Random stuff */ 654 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE); 655 p+=SSL3_RANDOM_SIZE; 656 657 /* Session ID */ 658 if (s->new_session) 659 i=0; 660 else 661 i=s->session->session_id_length; 662 *(p++)=i; 663 if (i != 0) 664 { 665 if (i > (int)sizeof(s->session->session_id)) 666 { 667 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); 668 goto err; 669 } 670 memcpy(p,s->session->session_id,i); 671 p+=i; 672 } 673 674 /* Ciphers supported */ 675 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0); 676 if (i == 0) 677 { 678 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE); 679 goto err; 680 } 681 s2n(i,p); 682 p+=i; 683 684 /* COMPRESSION */ 685#ifdef OPENSSL_NO_COMP 686 *(p++)=1; 687#else 688 689 if ((s->options & SSL_OP_NO_COMPRESSION) 690 || !s->ctx->comp_methods) 691 j=0; 692 else 693 j=sk_SSL_COMP_num(s->ctx->comp_methods); 694 *(p++)=1+j; 695 for (i=0; i<j; i++) 696 { 697 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i); 698 *(p++)=comp->id; 699 } 700#endif 701 *(p++)=0; /* Add the NULL method */ 702 703#ifndef OPENSSL_NO_TLSEXT 704 /* TLS extensions*/ 705 if (ssl_prepare_clienthello_tlsext(s) <= 0) 706 { 707 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT); 708 goto err; 709 } 710 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL) 711 { 712 SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR); 713 goto err; 714 } 715#endif 716 717 l=(p-d); 718 d=buf; 719 *(d++)=SSL3_MT_CLIENT_HELLO; 720 l2n3(l,d); 721 722 s->state=SSL3_ST_CW_CLNT_HELLO_B; 723 /* number of bytes to write */ 724 s->init_num=p-buf; 725 s->init_off=0; 726 } 727 728 /* SSL3_ST_CW_CLNT_HELLO_B */ 729 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 730err: 731 return(-1); 732 } 733 734int ssl3_get_server_hello(SSL *s) 735 { 736 STACK_OF(SSL_CIPHER) *sk; 737 const SSL_CIPHER *c; 738 unsigned char *p,*d; 739 int i,al,ok; 740 unsigned int j; 741 long n; 742#ifndef OPENSSL_NO_COMP 743 SSL_COMP *comp; 744#endif 745 746 n=s->method->ssl_get_message(s, 747 SSL3_ST_CR_SRVR_HELLO_A, 748 SSL3_ST_CR_SRVR_HELLO_B, 749 -1, 750 20000, /* ?? */ 751 &ok); 752 753 if (!ok) return((int)n); 754 755 if ( SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER) 756 { 757 if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST) 758 { 759 if ( s->d1->send_cookie == 0) 760 { 761 s->s3->tmp.reuse_message = 1; 762 return 1; 763 } 764 else /* already sent a cookie */ 765 { 766 al=SSL_AD_UNEXPECTED_MESSAGE; 767 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE); 768 goto f_err; 769 } 770 } 771 } 772 773 if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO) 774 { 775 al=SSL_AD_UNEXPECTED_MESSAGE; 776 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE); 777 goto f_err; 778 } 779 780 d=p=(unsigned char *)s->init_msg; 781 782 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff))) 783 { 784 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION); 785 s->version=(s->version&0xff00)|p[1]; 786 al=SSL_AD_PROTOCOL_VERSION; 787 goto f_err; 788 } 789 p+=2; 790 791 /* load the server hello data */ 792 /* load the server random */ 793 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE); 794 p+=SSL3_RANDOM_SIZE; 795 796 /* get the session-id */ 797 j= *(p++); 798 799 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE)) 800 { 801 al=SSL_AD_ILLEGAL_PARAMETER; 802 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG); 803 goto f_err; 804 } 805 806#ifndef OPENSSL_NO_TLSEXT 807 /* check if we want to resume the session based on external pre-shared secret */ 808 if (s->version >= TLS1_VERSION && s->tls_session_secret_cb) 809 { 810 SSL_CIPHER *pref_cipher=NULL; 811 s->session->master_key_length=sizeof(s->session->master_key); 812 if (s->tls_session_secret_cb(s, s->session->master_key, 813 &s->session->master_key_length, 814 NULL, &pref_cipher, 815 s->tls_session_secret_cb_arg)) 816 { 817 s->session->cipher = pref_cipher ? 818 pref_cipher : ssl_get_cipher_by_char(s, p+j); 819 s->s3->flags |= SSL3_FLAGS_CCS_OK; 820 } 821 } 822#endif /* OPENSSL_NO_TLSEXT */ 823 824 if (j != 0 && j == s->session->session_id_length 825 && memcmp(p,s->session->session_id,j) == 0) 826 { 827 if(s->sid_ctx_length != s->session->sid_ctx_length 828 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length)) 829 { 830 /* actually a client application bug */ 831 al=SSL_AD_ILLEGAL_PARAMETER; 832 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); 833 goto f_err; 834 } 835 s->s3->flags |= SSL3_FLAGS_CCS_OK; 836 s->hit=1; 837 } 838 else /* a miss or crap from the other end */ 839 { 840 /* If we were trying for session-id reuse, make a new 841 * SSL_SESSION so we don't stuff up other people */ 842 s->hit=0; 843 if (s->session->session_id_length > 0) 844 { 845 if (!ssl_get_new_session(s,0)) 846 { 847 al=SSL_AD_INTERNAL_ERROR; 848 goto f_err; 849 } 850 } 851 s->session->session_id_length=j; 852 memcpy(s->session->session_id,p,j); /* j could be 0 */ 853 } 854 p+=j; 855 c=ssl_get_cipher_by_char(s,p); 856 if (c == NULL) 857 { 858 /* unknown cipher */ 859 al=SSL_AD_ILLEGAL_PARAMETER; 860 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED); 861 goto f_err; 862 } 863 p+=ssl_put_cipher_by_char(s,NULL,NULL); 864 865 sk=ssl_get_ciphers_by_id(s); 866 i=sk_SSL_CIPHER_find(sk,c); 867 if (i < 0) 868 { 869 /* we did not say we would use this cipher */ 870 al=SSL_AD_ILLEGAL_PARAMETER; 871 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED); 872 goto f_err; 873 } 874 875 /* Depending on the session caching (internal/external), the cipher 876 and/or cipher_id values may not be set. Make sure that 877 cipher_id is set and use it for comparison. */ 878 if (s->session->cipher) 879 s->session->cipher_id = s->session->cipher->id; 880 if (s->hit && (s->session->cipher_id != c->id)) 881 { 882/* Workaround is now obsolete */ 883#if 0 884 if (!(s->options & 885 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG)) 886#endif 887 { 888 al=SSL_AD_ILLEGAL_PARAMETER; 889 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); 890 goto f_err; 891 } 892 } 893 s->s3->tmp.new_cipher=c; 894 if (!ssl3_digest_cached_records(s)) 895 { 896 al = SSL_AD_INTERNAL_ERROR; 897 goto f_err; 898 } 899 900 /* lets get the compression algorithm */ 901 /* COMPRESSION */ 902#ifdef OPENSSL_NO_COMP 903 if (*(p++) != 0) 904 { 905 al=SSL_AD_ILLEGAL_PARAMETER; 906 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); 907 goto f_err; 908 } 909 /* If compression is disabled we'd better not try to resume a session 910 * using compression. 911 */ 912 if (s->session->compress_meth != 0) 913 { 914 al=SSL_AD_INTERNAL_ERROR; 915 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_INCONSISTENT_COMPRESSION); 916 goto f_err; 917 } 918#else 919 j= *(p++); 920 if (s->hit && j != s->session->compress_meth) 921 { 922 al=SSL_AD_ILLEGAL_PARAMETER; 923 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED); 924 goto f_err; 925 } 926 if (j == 0) 927 comp=NULL; 928 else if (s->options & SSL_OP_NO_COMPRESSION) 929 { 930 al=SSL_AD_ILLEGAL_PARAMETER; 931 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_COMPRESSION_DISABLED); 932 goto f_err; 933 } 934 else 935 comp=ssl3_comp_find(s->ctx->comp_methods,j); 936 937 if ((j != 0) && (comp == NULL)) 938 { 939 al=SSL_AD_ILLEGAL_PARAMETER; 940 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); 941 goto f_err; 942 } 943 else 944 { 945 s->s3->tmp.new_compression=comp; 946 } 947#endif 948 949#ifndef OPENSSL_NO_TLSEXT 950 /* TLS extensions*/ 951 if (s->version >= SSL3_VERSION) 952 { 953 if (!ssl_parse_serverhello_tlsext(s,&p,d,n, &al)) 954 { 955 /* 'al' set by ssl_parse_serverhello_tlsext */ 956 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT); 957 goto f_err; 958 } 959 if (ssl_check_serverhello_tlsext(s) <= 0) 960 { 961 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SERVERHELLO_TLSEXT); 962 goto err; 963 } 964 } 965#endif 966 967 if (p != (d+n)) 968 { 969 /* wrong packet length */ 970 al=SSL_AD_DECODE_ERROR; 971 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH); 972 goto f_err; 973 } 974 975 return(1); 976f_err: 977 ssl3_send_alert(s,SSL3_AL_FATAL,al); 978#ifndef OPENSSL_NO_TLSEXT 979err: 980#endif 981 return(-1); 982 } 983 984int ssl3_get_server_certificate(SSL *s) 985 { 986 int al,i,ok,ret= -1; 987 unsigned long n,nc,llen,l; 988 X509 *x=NULL; 989 const unsigned char *q,*p; 990 unsigned char *d; 991 STACK_OF(X509) *sk=NULL; 992 SESS_CERT *sc; 993 EVP_PKEY *pkey=NULL; 994 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */ 995 996 n=s->method->ssl_get_message(s, 997 SSL3_ST_CR_CERT_A, 998 SSL3_ST_CR_CERT_B, 999 -1, 1000 s->max_cert_list, 1001 &ok); 1002 1003 if (!ok) return((int)n); 1004 1005 if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) || 1006 ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) && 1007 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE))) 1008 { 1009 s->s3->tmp.reuse_message=1; 1010 return(1); 1011 } 1012 1013 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE) 1014 { 1015 al=SSL_AD_UNEXPECTED_MESSAGE; 1016 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE); 1017 goto f_err; 1018 } 1019 p=d=(unsigned char *)s->init_msg; 1020 1021 if ((sk=sk_X509_new_null()) == NULL) 1022 { 1023 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE); 1024 goto err; 1025 } 1026 1027 n2l3(p,llen); 1028 if (llen+3 != n) 1029 { 1030 al=SSL_AD_DECODE_ERROR; 1031 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH); 1032 goto f_err; 1033 } 1034 for (nc=0; nc<llen; ) 1035 { 1036 n2l3(p,l); 1037 if ((l+nc+3) > llen) 1038 { 1039 al=SSL_AD_DECODE_ERROR; 1040 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); 1041 goto f_err; 1042 } 1043 1044 q=p; 1045 x=d2i_X509(NULL,&q,l); 1046 if (x == NULL) 1047 { 1048 al=SSL_AD_BAD_CERTIFICATE; 1049 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB); 1050 goto f_err; 1051 } 1052 if (q != (p+l)) 1053 { 1054 al=SSL_AD_DECODE_ERROR; 1055 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); 1056 goto f_err; 1057 } 1058 if (!sk_X509_push(sk,x)) 1059 { 1060 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE); 1061 goto err; 1062 } 1063 x=NULL; 1064 nc+=l+3; 1065 p=q; 1066 } 1067 1068 i=ssl_verify_cert_chain(s,sk); 1069 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0) 1070#ifndef OPENSSL_NO_KRB5 1071 && !((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) && 1072 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5)) 1073#endif /* OPENSSL_NO_KRB5 */ 1074 ) 1075 { 1076 al=ssl_verify_alarm_type(s->verify_result); 1077 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED); 1078 goto f_err; 1079 } 1080 ERR_clear_error(); /* but we keep s->verify_result */ 1081 1082 sc=ssl_sess_cert_new(); 1083 if (sc == NULL) goto err; 1084 1085 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert); 1086 s->session->sess_cert=sc; 1087 1088 sc->cert_chain=sk; 1089 /* Inconsistency alert: cert_chain does include the peer's 1090 * certificate, which we don't include in s3_srvr.c */ 1091 x=sk_X509_value(sk,0); 1092 sk=NULL; 1093 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/ 1094 1095 pkey=X509_get_pubkey(x); 1096 1097 /* VRS: allow null cert if auth == KRB5 */ 1098 need_cert = ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) && 1099 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5)) 1100 ? 0 : 1; 1101 1102#ifdef KSSL_DEBUG 1103 printf("pkey,x = %p, %p\n", pkey,x); 1104 printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey)); 1105 printf("cipher, alg, nc = %s, %lx, %lx, %d\n", s->s3->tmp.new_cipher->name, 1106 s->s3->tmp.new_cipher->algorithm_mkey, s->s3->tmp.new_cipher->algorithm_auth, need_cert); 1107#endif /* KSSL_DEBUG */ 1108 1109 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey))) 1110 { 1111 x=NULL; 1112 al=SSL3_AL_FATAL; 1113 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 1114 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); 1115 goto f_err; 1116 } 1117 1118 i=ssl_cert_type(x,pkey); 1119 if (need_cert && i < 0) 1120 { 1121 x=NULL; 1122 al=SSL3_AL_FATAL; 1123 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 1124 SSL_R_UNKNOWN_CERTIFICATE_TYPE); 1125 goto f_err; 1126 } 1127 1128 if (need_cert) 1129 { 1130 sc->peer_cert_type=i; 1131 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509); 1132 /* Why would the following ever happen? 1133 * We just created sc a couple of lines ago. */ 1134 if (sc->peer_pkeys[i].x509 != NULL) 1135 X509_free(sc->peer_pkeys[i].x509); 1136 sc->peer_pkeys[i].x509=x; 1137 sc->peer_key= &(sc->peer_pkeys[i]); 1138 1139 if (s->session->peer != NULL) 1140 X509_free(s->session->peer); 1141 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509); 1142 s->session->peer=x; 1143 } 1144 else 1145 { 1146 sc->peer_cert_type=i; 1147 sc->peer_key= NULL; 1148 1149 if (s->session->peer != NULL) 1150 X509_free(s->session->peer); 1151 s->session->peer=NULL; 1152 } 1153 s->session->verify_result = s->verify_result; 1154 1155 x=NULL; 1156 ret=1; 1157 1158 if (0) 1159 { 1160f_err: 1161 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1162 } 1163err: 1164 EVP_PKEY_free(pkey); 1165 X509_free(x); 1166 sk_X509_pop_free(sk,X509_free); 1167 return(ret); 1168 } 1169 1170int ssl3_get_key_exchange(SSL *s) 1171 { 1172#ifndef OPENSSL_NO_RSA 1173 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2]; 1174#endif 1175 EVP_MD_CTX md_ctx; 1176 unsigned char *param,*p; 1177 int al,j,ok; 1178 long i,param_len,n,alg_k,alg_a; 1179 EVP_PKEY *pkey=NULL; 1180#ifndef OPENSSL_NO_RSA 1181 RSA *rsa=NULL; 1182#endif 1183#ifndef OPENSSL_NO_DH 1184 DH *dh=NULL; 1185#endif 1186#ifndef OPENSSL_NO_ECDH 1187 EC_KEY *ecdh = NULL; 1188 BN_CTX *bn_ctx = NULL; 1189 EC_POINT *srvr_ecpoint = NULL; 1190 int curve_nid = 0; 1191 int encoded_pt_len = 0; 1192#endif 1193 1194 EVP_MD_CTX_init(&md_ctx); 1195 1196 /* use same message size as in ssl3_get_certificate_request() 1197 * as ServerKeyExchange message may be skipped */ 1198 n=s->method->ssl_get_message(s, 1199 SSL3_ST_CR_KEY_EXCH_A, 1200 SSL3_ST_CR_KEY_EXCH_B, 1201 -1, 1202 s->max_cert_list, 1203 &ok); 1204 if (!ok) return((int)n); 1205 1206 alg_k=s->s3->tmp.new_cipher->algorithm_mkey; 1207 1208 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE) 1209 { 1210 /* 1211 * Can't skip server key exchange if this is an ephemeral 1212 * ciphersuite. 1213 */ 1214 if (alg_k & (SSL_kEDH|SSL_kEECDH)) 1215 { 1216 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); 1217 al = SSL_AD_UNEXPECTED_MESSAGE; 1218 goto f_err; 1219 } 1220#ifndef OPENSSL_NO_PSK 1221 /* In plain PSK ciphersuite, ServerKeyExchange can be 1222 omitted if no identity hint is sent. Set 1223 session->sess_cert anyway to avoid problems 1224 later.*/ 1225 if (alg_k & SSL_kPSK) 1226 { 1227 s->session->sess_cert=ssl_sess_cert_new(); 1228 if (s->ctx->psk_identity_hint) 1229 OPENSSL_free(s->ctx->psk_identity_hint); 1230 s->ctx->psk_identity_hint = NULL; 1231 } 1232#endif 1233 s->s3->tmp.reuse_message=1; 1234 return(1); 1235 } 1236 1237 param=p=(unsigned char *)s->init_msg; 1238 if (s->session->sess_cert != NULL) 1239 { 1240#ifndef OPENSSL_NO_RSA 1241 if (s->session->sess_cert->peer_rsa_tmp != NULL) 1242 { 1243 RSA_free(s->session->sess_cert->peer_rsa_tmp); 1244 s->session->sess_cert->peer_rsa_tmp=NULL; 1245 } 1246#endif 1247#ifndef OPENSSL_NO_DH 1248 if (s->session->sess_cert->peer_dh_tmp) 1249 { 1250 DH_free(s->session->sess_cert->peer_dh_tmp); 1251 s->session->sess_cert->peer_dh_tmp=NULL; 1252 } 1253#endif 1254#ifndef OPENSSL_NO_ECDH 1255 if (s->session->sess_cert->peer_ecdh_tmp) 1256 { 1257 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp); 1258 s->session->sess_cert->peer_ecdh_tmp=NULL; 1259 } 1260#endif 1261 } 1262 else 1263 { 1264 s->session->sess_cert=ssl_sess_cert_new(); 1265 } 1266 1267 /* Total length of the parameters including the length prefix */ 1268 param_len=0; 1269 1270 alg_a=s->s3->tmp.new_cipher->algorithm_auth; 1271 1272 al=SSL_AD_DECODE_ERROR; 1273 1274#ifndef OPENSSL_NO_PSK 1275 if (alg_k & SSL_kPSK) 1276 { 1277 char tmp_id_hint[PSK_MAX_IDENTITY_LEN+1]; 1278 1279 param_len = 2; 1280 if (param_len > n) 1281 { 1282 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1283 SSL_R_LENGTH_TOO_SHORT); 1284 goto f_err; 1285 } 1286 n2s(p,i); 1287 1288 /* Store PSK identity hint for later use, hint is used 1289 * in ssl3_send_client_key_exchange. Assume that the 1290 * maximum length of a PSK identity hint can be as 1291 * long as the maximum length of a PSK identity. */ 1292 if (i > PSK_MAX_IDENTITY_LEN) 1293 { 1294 al=SSL_AD_HANDSHAKE_FAILURE; 1295 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1296 SSL_R_DATA_LENGTH_TOO_LONG); 1297 goto f_err; 1298 } 1299 if (i > n - param_len) 1300 { 1301 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1302 SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH); 1303 goto f_err; 1304 } 1305 param_len += i; 1306 1307 /* If received PSK identity hint contains NULL 1308 * characters, the hint is truncated from the first 1309 * NULL. p may not be ending with NULL, so create a 1310 * NULL-terminated string. */ 1311 memcpy(tmp_id_hint, p, i); 1312 memset(tmp_id_hint+i, 0, PSK_MAX_IDENTITY_LEN+1-i); 1313 if (s->ctx->psk_identity_hint != NULL) 1314 OPENSSL_free(s->ctx->psk_identity_hint); 1315 s->ctx->psk_identity_hint = BUF_strdup(tmp_id_hint); 1316 if (s->ctx->psk_identity_hint == NULL) 1317 { 1318 al=SSL_AD_HANDSHAKE_FAILURE; 1319 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); 1320 goto f_err; 1321 } 1322 1323 p+=i; 1324 n-=param_len; 1325 } 1326 else 1327#endif /* !OPENSSL_NO_PSK */ 1328#ifndef OPENSSL_NO_RSA 1329 if (alg_k & SSL_kRSA) 1330 { 1331 /* Temporary RSA keys only allowed in export ciphersuites */ 1332 if (!SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)) 1333 { 1334 al=SSL_AD_UNEXPECTED_MESSAGE; 1335 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE); 1336 goto f_err; 1337 } 1338 if ((rsa=RSA_new()) == NULL) 1339 { 1340 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1341 goto err; 1342 } 1343 1344 param_len = 2; 1345 if (param_len > n) 1346 { 1347 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1348 SSL_R_LENGTH_TOO_SHORT); 1349 goto f_err; 1350 } 1351 n2s(p,i); 1352 1353 if (i > n - param_len) 1354 { 1355 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH); 1356 goto f_err; 1357 } 1358 param_len += i; 1359 1360 if (!(rsa->n=BN_bin2bn(p,i,rsa->n))) 1361 { 1362 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1363 goto err; 1364 } 1365 p+=i; 1366 1367 if (2 > n - param_len) 1368 { 1369 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1370 SSL_R_LENGTH_TOO_SHORT); 1371 goto f_err; 1372 } 1373 param_len += 2; 1374 1375 n2s(p,i); 1376 1377 if (i > n - param_len) 1378 { 1379 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH); 1380 goto f_err; 1381 } 1382 param_len += i; 1383 1384 if (!(rsa->e=BN_bin2bn(p,i,rsa->e))) 1385 { 1386 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1387 goto err; 1388 } 1389 p+=i; 1390 n-=param_len; 1391 1392 /* this should be because we are using an export cipher */ 1393 if (alg_a & SSL_aRSA) 1394 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1395 else 1396 { 1397 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1398 goto err; 1399 } 1400 s->session->sess_cert->peer_rsa_tmp=rsa; 1401 rsa=NULL; 1402 } 1403#else /* OPENSSL_NO_RSA */ 1404 if (0) 1405 ; 1406#endif 1407#ifndef OPENSSL_NO_DH 1408 else if (alg_k & SSL_kEDH) 1409 { 1410 if ((dh=DH_new()) == NULL) 1411 { 1412 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB); 1413 goto err; 1414 } 1415 1416 param_len = 2; 1417 if (param_len > n) 1418 { 1419 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1420 SSL_R_LENGTH_TOO_SHORT); 1421 goto f_err; 1422 } 1423 n2s(p,i); 1424 1425 if (i > n - param_len) 1426 { 1427 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH); 1428 goto f_err; 1429 } 1430 param_len += i; 1431 1432 if (!(dh->p=BN_bin2bn(p,i,NULL))) 1433 { 1434 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1435 goto err; 1436 } 1437 p+=i; 1438 1439 if (2 > n - param_len) 1440 { 1441 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1442 SSL_R_LENGTH_TOO_SHORT); 1443 goto f_err; 1444 } 1445 param_len += 2; 1446 1447 n2s(p,i); 1448 1449 if (i > n - param_len) 1450 { 1451 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH); 1452 goto f_err; 1453 } 1454 param_len += i; 1455 1456 if (!(dh->g=BN_bin2bn(p,i,NULL))) 1457 { 1458 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1459 goto err; 1460 } 1461 p+=i; 1462 1463 if (2 > n - param_len) 1464 { 1465 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1466 SSL_R_LENGTH_TOO_SHORT); 1467 goto f_err; 1468 } 1469 param_len += 2; 1470 1471 n2s(p,i); 1472 1473 if (i > n - param_len) 1474 { 1475 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH); 1476 goto f_err; 1477 } 1478 param_len += i; 1479 1480 if (!(dh->pub_key=BN_bin2bn(p,i,NULL))) 1481 { 1482 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1483 goto err; 1484 } 1485 p+=i; 1486 n-=param_len; 1487 1488#ifndef OPENSSL_NO_RSA 1489 if (alg_a & SSL_aRSA) 1490 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1491#else 1492 if (0) 1493 ; 1494#endif 1495#ifndef OPENSSL_NO_DSA 1496 else if (alg_a & SSL_aDSS) 1497 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509); 1498#endif 1499 /* else anonymous DH, so no certificate or pkey. */ 1500 1501 s->session->sess_cert->peer_dh_tmp=dh; 1502 dh=NULL; 1503 } 1504 else if ((alg_k & SSL_kDHr) || (alg_k & SSL_kDHd)) 1505 { 1506 al=SSL_AD_ILLEGAL_PARAMETER; 1507 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER); 1508 goto f_err; 1509 } 1510#endif /* !OPENSSL_NO_DH */ 1511 1512#ifndef OPENSSL_NO_ECDH 1513 else if (alg_k & SSL_kEECDH) 1514 { 1515 EC_GROUP *ngroup; 1516 const EC_GROUP *group; 1517 1518 if ((ecdh=EC_KEY_new()) == NULL) 1519 { 1520 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1521 goto err; 1522 } 1523 1524 /* Extract elliptic curve parameters and the 1525 * server's ephemeral ECDH public key. 1526 * Keep accumulating lengths of various components in 1527 * param_len and make sure it never exceeds n. 1528 */ 1529 1530 /* XXX: For now we only support named (not generic) curves 1531 * and the ECParameters in this case is just three bytes. We 1532 * also need one byte for the length of the encoded point 1533 */ 1534 param_len=4; 1535 if (param_len > n) 1536 { 1537 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1538 SSL_R_LENGTH_TOO_SHORT); 1539 goto f_err; 1540 } 1541 1542 if ((*p != NAMED_CURVE_TYPE) || 1543 ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0)) 1544 { 1545 al=SSL_AD_INTERNAL_ERROR; 1546 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); 1547 goto f_err; 1548 } 1549 1550 ngroup = EC_GROUP_new_by_curve_name(curve_nid); 1551 if (ngroup == NULL) 1552 { 1553 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB); 1554 goto err; 1555 } 1556 if (EC_KEY_set_group(ecdh, ngroup) == 0) 1557 { 1558 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB); 1559 goto err; 1560 } 1561 EC_GROUP_free(ngroup); 1562 1563 group = EC_KEY_get0_group(ecdh); 1564 1565 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && 1566 (EC_GROUP_get_degree(group) > 163)) 1567 { 1568 al=SSL_AD_EXPORT_RESTRICTION; 1569 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER); 1570 goto f_err; 1571 } 1572 1573 p+=3; 1574 1575 /* Next, get the encoded ECPoint */ 1576 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) || 1577 ((bn_ctx = BN_CTX_new()) == NULL)) 1578 { 1579 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1580 goto err; 1581 } 1582 1583 encoded_pt_len = *p; /* length of encoded point */ 1584 p+=1; 1585 1586 if ((encoded_pt_len > n - param_len) || 1587 (EC_POINT_oct2point(group, srvr_ecpoint, 1588 p, encoded_pt_len, bn_ctx) == 0)) 1589 { 1590 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT); 1591 goto f_err; 1592 } 1593 param_len += encoded_pt_len; 1594 1595 n-=param_len; 1596 p+=encoded_pt_len; 1597 1598 /* The ECC/TLS specification does not mention 1599 * the use of DSA to sign ECParameters in the server 1600 * key exchange message. We do support RSA and ECDSA. 1601 */ 1602 if (0) ; 1603#ifndef OPENSSL_NO_RSA 1604 else if (alg_a & SSL_aRSA) 1605 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1606#endif 1607#ifndef OPENSSL_NO_ECDSA 1608 else if (alg_a & SSL_aECDSA) 1609 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509); 1610#endif 1611 /* else anonymous ECDH, so no certificate or pkey. */ 1612 EC_KEY_set_public_key(ecdh, srvr_ecpoint); 1613 s->session->sess_cert->peer_ecdh_tmp=ecdh; 1614 ecdh=NULL; 1615 BN_CTX_free(bn_ctx); 1616 bn_ctx = NULL; 1617 EC_POINT_free(srvr_ecpoint); 1618 srvr_ecpoint = NULL; 1619 } 1620 else if (alg_k) 1621 { 1622 al=SSL_AD_UNEXPECTED_MESSAGE; 1623 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE); 1624 goto f_err; 1625 } 1626#endif /* !OPENSSL_NO_ECDH */ 1627 1628 1629 /* p points to the next byte, there are 'n' bytes left */ 1630 1631 /* if it was signed, check the signature */ 1632 if (pkey != NULL) 1633 { 1634 n2s(p,i); 1635 n-=2; 1636 j=EVP_PKEY_size(pkey); 1637 1638 /* Check signature length. If n is 0 then signature is empty */ 1639 if ((i != n) || (n > j) || (n <= 0)) 1640 { 1641 /* wrong packet length */ 1642 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH); 1643 goto f_err; 1644 } 1645 1646#ifndef OPENSSL_NO_RSA 1647 if (pkey->type == EVP_PKEY_RSA) 1648 { 1649 int num; 1650 unsigned int size; 1651 1652 j=0; 1653 q=md_buf; 1654 for (num=2; num > 0; num--) 1655 { 1656 EVP_DigestInit_ex(&md_ctx,(num == 2) 1657 ?s->ctx->md5:s->ctx->sha1, NULL); 1658 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); 1659 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); 1660 EVP_DigestUpdate(&md_ctx,param,param_len); 1661 EVP_DigestFinal_ex(&md_ctx,q,&size); 1662 q+=size; 1663 j+=size; 1664 } 1665 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n, 1666 pkey->pkey.rsa); 1667 if (i < 0) 1668 { 1669 al=SSL_AD_DECRYPT_ERROR; 1670 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT); 1671 goto f_err; 1672 } 1673 if (i == 0) 1674 { 1675 /* bad signature */ 1676 al=SSL_AD_DECRYPT_ERROR; 1677 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE); 1678 goto f_err; 1679 } 1680 } 1681 else 1682#endif 1683#ifndef OPENSSL_NO_DSA 1684 if (pkey->type == EVP_PKEY_DSA) 1685 { 1686 /* lets do DSS */ 1687 EVP_VerifyInit_ex(&md_ctx,EVP_dss1(), NULL); 1688 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); 1689 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); 1690 EVP_VerifyUpdate(&md_ctx,param,param_len); 1691 if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0) 1692 { 1693 /* bad signature */ 1694 al=SSL_AD_DECRYPT_ERROR; 1695 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE); 1696 goto f_err; 1697 } 1698 } 1699 else 1700#endif 1701#ifndef OPENSSL_NO_ECDSA 1702 if (pkey->type == EVP_PKEY_EC) 1703 { 1704 /* let's do ECDSA */ 1705 EVP_VerifyInit_ex(&md_ctx,EVP_ecdsa(), NULL); 1706 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); 1707 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); 1708 EVP_VerifyUpdate(&md_ctx,param,param_len); 1709 if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0) 1710 { 1711 /* bad signature */ 1712 al=SSL_AD_DECRYPT_ERROR; 1713 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE); 1714 goto f_err; 1715 } 1716 } 1717 else 1718#endif 1719 { 1720 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1721 goto err; 1722 } 1723 } 1724 else 1725 { 1726 if (!(alg_a & SSL_aNULL) && !(alg_k & SSL_kPSK)) 1727 /* aNULL or kPSK do not need public keys */ 1728 { 1729 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1730 goto err; 1731 } 1732 /* still data left over */ 1733 if (n != 0) 1734 { 1735 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE); 1736 goto f_err; 1737 } 1738 } 1739 EVP_PKEY_free(pkey); 1740 EVP_MD_CTX_cleanup(&md_ctx); 1741 return(1); 1742f_err: 1743 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1744err: 1745 EVP_PKEY_free(pkey); 1746#ifndef OPENSSL_NO_RSA 1747 if (rsa != NULL) 1748 RSA_free(rsa); 1749#endif 1750#ifndef OPENSSL_NO_DH 1751 if (dh != NULL) 1752 DH_free(dh); 1753#endif 1754#ifndef OPENSSL_NO_ECDH 1755 BN_CTX_free(bn_ctx); 1756 EC_POINT_free(srvr_ecpoint); 1757 if (ecdh != NULL) 1758 EC_KEY_free(ecdh); 1759#endif 1760 EVP_MD_CTX_cleanup(&md_ctx); 1761 return(-1); 1762 } 1763 1764int ssl3_get_certificate_request(SSL *s) 1765 { 1766 int ok,ret=0; 1767 unsigned long n,nc,l; 1768 unsigned int llen,ctype_num,i; 1769 X509_NAME *xn=NULL; 1770 const unsigned char *p,*q; 1771 unsigned char *d; 1772 STACK_OF(X509_NAME) *ca_sk=NULL; 1773 1774 n=s->method->ssl_get_message(s, 1775 SSL3_ST_CR_CERT_REQ_A, 1776 SSL3_ST_CR_CERT_REQ_B, 1777 -1, 1778 s->max_cert_list, 1779 &ok); 1780 1781 if (!ok) return((int)n); 1782 1783 s->s3->tmp.cert_req=0; 1784 1785 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE) 1786 { 1787 s->s3->tmp.reuse_message=1; 1788 return(1); 1789 } 1790 1791 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST) 1792 { 1793 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 1794 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE); 1795 goto err; 1796 } 1797 1798 /* TLS does not like anon-DH with client cert */ 1799 if (s->version > SSL3_VERSION) 1800 { 1801 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) 1802 { 1803 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 1804 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER); 1805 goto err; 1806 } 1807 } 1808 1809 p=d=(unsigned char *)s->init_msg; 1810 1811 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL) 1812 { 1813 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE); 1814 goto err; 1815 } 1816 1817 /* get the certificate types */ 1818 ctype_num= *(p++); 1819 if (ctype_num > SSL3_CT_NUMBER) 1820 ctype_num=SSL3_CT_NUMBER; 1821 for (i=0; i<ctype_num; i++) 1822 s->s3->tmp.ctype[i]= p[i]; 1823 p+=ctype_num; 1824 1825 /* get the CA RDNs */ 1826 n2s(p,llen); 1827#if 0 1828{ 1829FILE *out; 1830out=fopen("/tmp/vsign.der","w"); 1831fwrite(p,1,llen,out); 1832fclose(out); 1833} 1834#endif 1835 1836 if ((llen+ctype_num+2+1) != n) 1837 { 1838 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1839 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH); 1840 goto err; 1841 } 1842 1843 for (nc=0; nc<llen; ) 1844 { 1845 n2s(p,l); 1846 if ((l+nc+2) > llen) 1847 { 1848 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG)) 1849 goto cont; /* netscape bugs */ 1850 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1851 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG); 1852 goto err; 1853 } 1854 1855 q=p; 1856 1857 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL) 1858 { 1859 /* If netscape tolerance is on, ignore errors */ 1860 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG) 1861 goto cont; 1862 else 1863 { 1864 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1865 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB); 1866 goto err; 1867 } 1868 } 1869 1870 if (q != (p+l)) 1871 { 1872 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1873 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH); 1874 goto err; 1875 } 1876 if (!sk_X509_NAME_push(ca_sk,xn)) 1877 { 1878 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE); 1879 goto err; 1880 } 1881 1882 p+=l; 1883 nc+=l+2; 1884 } 1885 1886 if (0) 1887 { 1888cont: 1889 ERR_clear_error(); 1890 } 1891 1892 /* we should setup a certificate to return.... */ 1893 s->s3->tmp.cert_req=1; 1894 s->s3->tmp.ctype_num=ctype_num; 1895 if (s->s3->tmp.ca_names != NULL) 1896 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free); 1897 s->s3->tmp.ca_names=ca_sk; 1898 ca_sk=NULL; 1899 1900 ret=1; 1901err: 1902 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free); 1903 return(ret); 1904 } 1905 1906static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b) 1907 { 1908 return(X509_NAME_cmp(*a,*b)); 1909 } 1910#ifndef OPENSSL_NO_TLSEXT 1911int ssl3_get_new_session_ticket(SSL *s) 1912 { 1913 int ok,al,ret=0, ticklen; 1914 long n; 1915 const unsigned char *p; 1916 unsigned char *d; 1917 1918 n=s->method->ssl_get_message(s, 1919 SSL3_ST_CR_SESSION_TICKET_A, 1920 SSL3_ST_CR_SESSION_TICKET_B, 1921 -1, 1922 16384, 1923 &ok); 1924 1925 if (!ok) 1926 return((int)n); 1927 1928 if (s->s3->tmp.message_type == SSL3_MT_FINISHED) 1929 { 1930 s->s3->tmp.reuse_message=1; 1931 return(1); 1932 } 1933 if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET) 1934 { 1935 al=SSL_AD_UNEXPECTED_MESSAGE; 1936 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_BAD_MESSAGE_TYPE); 1937 goto f_err; 1938 } 1939 if (n < 6) 1940 { 1941 /* need at least ticket_lifetime_hint + ticket length */ 1942 al = SSL_AD_DECODE_ERROR; 1943 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH); 1944 goto f_err; 1945 } 1946 1947 p=d=(unsigned char *)s->init_msg; 1948 n2l(p, s->session->tlsext_tick_lifetime_hint); 1949 n2s(p, ticklen); 1950 /* ticket_lifetime_hint + ticket_length + ticket */ 1951 if (ticklen + 6 != n) 1952 { 1953 al = SSL_AD_DECODE_ERROR; 1954 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH); 1955 goto f_err; 1956 } 1957 if (s->session->tlsext_tick) 1958 { 1959 OPENSSL_free(s->session->tlsext_tick); 1960 s->session->tlsext_ticklen = 0; 1961 } 1962 s->session->tlsext_tick = OPENSSL_malloc(ticklen); 1963 if (!s->session->tlsext_tick) 1964 { 1965 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE); 1966 goto err; 1967 } 1968 memcpy(s->session->tlsext_tick, p, ticklen); 1969 s->session->tlsext_ticklen = ticklen; 1970 /* There are two ways to detect a resumed ticket sesion. 1971 * One is to set an appropriate session ID and then the server 1972 * must return a match in ServerHello. This allows the normal 1973 * client session ID matching to work and we know much 1974 * earlier that the ticket has been accepted. 1975 * 1976 * The other way is to set zero length session ID when the 1977 * ticket is presented and rely on the handshake to determine 1978 * session resumption. 1979 * 1980 * We choose the former approach because this fits in with 1981 * assumptions elsewhere in OpenSSL. The session ID is set 1982 * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the 1983 * ticket. 1984 */ 1985 EVP_Digest(p, ticklen, 1986 s->session->session_id, &s->session->session_id_length, 1987#ifndef OPENSSL_NO_SHA256 1988 EVP_sha256(), NULL); 1989#else 1990 EVP_sha1(), NULL); 1991#endif 1992 ret=1; 1993 return(ret); 1994f_err: 1995 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1996err: 1997 return(-1); 1998 } 1999 2000int ssl3_get_cert_status(SSL *s) 2001 { 2002 int ok, al; 2003 unsigned long resplen,n; 2004 const unsigned char *p; 2005 2006 n=s->method->ssl_get_message(s, 2007 SSL3_ST_CR_CERT_STATUS_A, 2008 SSL3_ST_CR_CERT_STATUS_B, 2009 SSL3_MT_CERTIFICATE_STATUS, 2010 16384, 2011 &ok); 2012 2013 if (!ok) return((int)n); 2014 if (n < 4) 2015 { 2016 /* need at least status type + length */ 2017 al = SSL_AD_DECODE_ERROR; 2018 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH); 2019 goto f_err; 2020 } 2021 p = (unsigned char *)s->init_msg; 2022 if (*p++ != TLSEXT_STATUSTYPE_ocsp) 2023 { 2024 al = SSL_AD_DECODE_ERROR; 2025 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_UNSUPPORTED_STATUS_TYPE); 2026 goto f_err; 2027 } 2028 n2l3(p, resplen); 2029 if (resplen + 4 != n) 2030 { 2031 al = SSL_AD_DECODE_ERROR; 2032 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH); 2033 goto f_err; 2034 } 2035 if (s->tlsext_ocsp_resp) 2036 OPENSSL_free(s->tlsext_ocsp_resp); 2037 s->tlsext_ocsp_resp = BUF_memdup(p, resplen); 2038 if (!s->tlsext_ocsp_resp) 2039 { 2040 al = SSL_AD_INTERNAL_ERROR; 2041 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE); 2042 goto f_err; 2043 } 2044 s->tlsext_ocsp_resplen = resplen; 2045 if (s->ctx->tlsext_status_cb) 2046 { 2047 int ret; 2048 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg); 2049 if (ret == 0) 2050 { 2051 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE; 2052 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_INVALID_STATUS_RESPONSE); 2053 goto f_err; 2054 } 2055 if (ret < 0) 2056 { 2057 al = SSL_AD_INTERNAL_ERROR; 2058 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE); 2059 goto f_err; 2060 } 2061 } 2062 return 1; 2063f_err: 2064 ssl3_send_alert(s,SSL3_AL_FATAL,al); 2065 return(-1); 2066 } 2067#endif 2068 2069int ssl3_get_server_done(SSL *s) 2070 { 2071 int ok,ret=0; 2072 long n; 2073 2074 n=s->method->ssl_get_message(s, 2075 SSL3_ST_CR_SRVR_DONE_A, 2076 SSL3_ST_CR_SRVR_DONE_B, 2077 SSL3_MT_SERVER_DONE, 2078 30, /* should be very small, like 0 :-) */ 2079 &ok); 2080 2081 if (!ok) return((int)n); 2082 if (n > 0) 2083 { 2084 /* should contain no data */ 2085 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 2086 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH); 2087 return -1; 2088 } 2089 ret=1; 2090 return(ret); 2091 } 2092 2093 2094int ssl3_send_client_key_exchange(SSL *s) 2095 { 2096 unsigned char *p,*d; 2097 int n; 2098 unsigned long alg_k; 2099#ifndef OPENSSL_NO_RSA 2100 unsigned char *q; 2101 EVP_PKEY *pkey=NULL; 2102#endif 2103#ifndef OPENSSL_NO_KRB5 2104 KSSL_ERR kssl_err; 2105#endif /* OPENSSL_NO_KRB5 */ 2106#ifndef OPENSSL_NO_ECDH 2107 EC_KEY *clnt_ecdh = NULL; 2108 const EC_POINT *srvr_ecpoint = NULL; 2109 EVP_PKEY *srvr_pub_pkey = NULL; 2110 unsigned char *encodedPoint = NULL; 2111 int encoded_pt_len = 0; 2112 BN_CTX * bn_ctx = NULL; 2113#endif 2114 2115 if (s->state == SSL3_ST_CW_KEY_EXCH_A) 2116 { 2117 d=(unsigned char *)s->init_buf->data; 2118 p= &(d[4]); 2119 2120 alg_k=s->s3->tmp.new_cipher->algorithm_mkey; 2121 2122 /* Fool emacs indentation */ 2123 if (0) {} 2124#ifndef OPENSSL_NO_RSA 2125 else if (alg_k & SSL_kRSA) 2126 { 2127 RSA *rsa; 2128 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; 2129 2130 if (s->session->sess_cert == NULL) 2131 { 2132 /* We should always have a server certificate with SSL_kRSA. */ 2133 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 2134 goto err; 2135 } 2136 2137 if (s->session->sess_cert->peer_rsa_tmp != NULL) 2138 rsa=s->session->sess_cert->peer_rsa_tmp; 2139 else 2140 { 2141 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 2142 if ((pkey == NULL) || 2143 (pkey->type != EVP_PKEY_RSA) || 2144 (pkey->pkey.rsa == NULL)) 2145 { 2146 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 2147 goto err; 2148 } 2149 rsa=pkey->pkey.rsa; 2150 EVP_PKEY_free(pkey); 2151 } 2152 2153 tmp_buf[0]=s->client_version>>8; 2154 tmp_buf[1]=s->client_version&0xff; 2155 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0) 2156 goto err; 2157 2158 s->session->master_key_length=sizeof tmp_buf; 2159 2160 q=p; 2161 /* Fix buf for TLS and beyond */ 2162 if (s->version > SSL3_VERSION) 2163 p+=2; 2164 n=RSA_public_encrypt(sizeof tmp_buf, 2165 tmp_buf,p,rsa,RSA_PKCS1_PADDING); 2166#ifdef PKCS1_CHECK 2167 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++; 2168 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70; 2169#endif 2170 if (n <= 0) 2171 { 2172 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT); 2173 goto err; 2174 } 2175 2176 /* Fix buf for TLS and beyond */ 2177 if (s->version > SSL3_VERSION) 2178 { 2179 s2n(n,q); 2180 n+=2; 2181 } 2182 2183 s->session->master_key_length= 2184 s->method->ssl3_enc->generate_master_secret(s, 2185 s->session->master_key, 2186 tmp_buf,sizeof tmp_buf); 2187 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf); 2188 } 2189#endif 2190#ifndef OPENSSL_NO_KRB5 2191 else if (alg_k & SSL_kKRB5) 2192 { 2193 krb5_error_code krb5rc; 2194 KSSL_CTX *kssl_ctx = s->kssl_ctx; 2195 /* krb5_data krb5_ap_req; */ 2196 krb5_data *enc_ticket; 2197 krb5_data authenticator, *authp = NULL; 2198 EVP_CIPHER_CTX ciph_ctx; 2199 const EVP_CIPHER *enc = NULL; 2200 unsigned char iv[EVP_MAX_IV_LENGTH]; 2201 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; 2202 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH 2203 + EVP_MAX_IV_LENGTH]; 2204 int padl, outl = sizeof(epms); 2205 2206 EVP_CIPHER_CTX_init(&ciph_ctx); 2207 2208#ifdef KSSL_DEBUG 2209 printf("ssl3_send_client_key_exchange(%lx & %lx)\n", 2210 alg_k, SSL_kKRB5); 2211#endif /* KSSL_DEBUG */ 2212 2213 authp = NULL; 2214#ifdef KRB5SENDAUTH 2215 if (KRB5SENDAUTH) authp = &authenticator; 2216#endif /* KRB5SENDAUTH */ 2217 2218 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp, 2219 &kssl_err); 2220 enc = kssl_map_enc(kssl_ctx->enctype); 2221 if (enc == NULL) 2222 goto err; 2223#ifdef KSSL_DEBUG 2224 { 2225 printf("kssl_cget_tkt rtn %d\n", krb5rc); 2226 if (krb5rc && kssl_err.text) 2227 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text); 2228 } 2229#endif /* KSSL_DEBUG */ 2230 2231 if (krb5rc) 2232 { 2233 ssl3_send_alert(s,SSL3_AL_FATAL, 2234 SSL_AD_HANDSHAKE_FAILURE); 2235 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2236 kssl_err.reason); 2237 goto err; 2238 } 2239 2240 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ 2241 ** in place of RFC 2712 KerberosWrapper, as in: 2242 ** 2243 ** Send ticket (copy to *p, set n = length) 2244 ** n = krb5_ap_req.length; 2245 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length); 2246 ** if (krb5_ap_req.data) 2247 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req); 2248 ** 2249 ** Now using real RFC 2712 KerberosWrapper 2250 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>) 2251 ** Note: 2712 "opaque" types are here replaced 2252 ** with a 2-byte length followed by the value. 2253 ** Example: 2254 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms 2255 ** Where "xx xx" = length bytes. Shown here with 2256 ** optional authenticator omitted. 2257 */ 2258 2259 /* KerberosWrapper.Ticket */ 2260 s2n(enc_ticket->length,p); 2261 memcpy(p, enc_ticket->data, enc_ticket->length); 2262 p+= enc_ticket->length; 2263 n = enc_ticket->length + 2; 2264 2265 /* KerberosWrapper.Authenticator */ 2266 if (authp && authp->length) 2267 { 2268 s2n(authp->length,p); 2269 memcpy(p, authp->data, authp->length); 2270 p+= authp->length; 2271 n+= authp->length + 2; 2272 2273 free(authp->data); 2274 authp->data = NULL; 2275 authp->length = 0; 2276 } 2277 else 2278 { 2279 s2n(0,p);/* null authenticator length */ 2280 n+=2; 2281 } 2282 2283 tmp_buf[0]=s->client_version>>8; 2284 tmp_buf[1]=s->client_version&0xff; 2285 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0) 2286 goto err; 2287 2288 /* 20010420 VRS. Tried it this way; failed. 2289 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL); 2290 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx, 2291 ** kssl_ctx->length); 2292 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv); 2293 */ 2294 2295 memset(iv, 0, sizeof iv); /* per RFC 1510 */ 2296 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL, 2297 kssl_ctx->key,iv); 2298 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf, 2299 sizeof tmp_buf); 2300 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl); 2301 outl += padl; 2302 if (outl > (int)sizeof epms) 2303 { 2304 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); 2305 goto err; 2306 } 2307 EVP_CIPHER_CTX_cleanup(&ciph_ctx); 2308 2309 /* KerberosWrapper.EncryptedPreMasterSecret */ 2310 s2n(outl,p); 2311 memcpy(p, epms, outl); 2312 p+=outl; 2313 n+=outl + 2; 2314 2315 s->session->master_key_length= 2316 s->method->ssl3_enc->generate_master_secret(s, 2317 s->session->master_key, 2318 tmp_buf, sizeof tmp_buf); 2319 2320 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf); 2321 OPENSSL_cleanse(epms, outl); 2322 } 2323#endif 2324#ifndef OPENSSL_NO_DH 2325 else if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) 2326 { 2327 DH *dh_srvr,*dh_clnt; 2328 2329 if (s->session->sess_cert == NULL) 2330 { 2331 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 2332 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE); 2333 goto err; 2334 } 2335 2336 if (s->session->sess_cert->peer_dh_tmp != NULL) 2337 dh_srvr=s->session->sess_cert->peer_dh_tmp; 2338 else 2339 { 2340 /* we get them from the cert */ 2341 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); 2342 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS); 2343 goto err; 2344 } 2345 2346 /* generate a new random key */ 2347 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL) 2348 { 2349 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 2350 goto err; 2351 } 2352 if (!DH_generate_key(dh_clnt)) 2353 { 2354 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 2355 DH_free(dh_clnt); 2356 goto err; 2357 } 2358 2359 /* use the 'p' output buffer for the DH key, but 2360 * make sure to clear it out afterwards */ 2361 2362 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt); 2363 2364 if (n <= 0) 2365 { 2366 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 2367 DH_free(dh_clnt); 2368 goto err; 2369 } 2370 2371 /* generate master key from the result */ 2372 s->session->master_key_length= 2373 s->method->ssl3_enc->generate_master_secret(s, 2374 s->session->master_key,p,n); 2375 /* clean up */ 2376 memset(p,0,n); 2377 2378 /* send off the data */ 2379 n=BN_num_bytes(dh_clnt->pub_key); 2380 s2n(n,p); 2381 BN_bn2bin(dh_clnt->pub_key,p); 2382 n+=2; 2383 2384 DH_free(dh_clnt); 2385 2386 /* perhaps clean things up a bit EAY EAY EAY EAY*/ 2387 } 2388#endif 2389 2390#ifndef OPENSSL_NO_ECDH 2391 else if (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)) 2392 { 2393 const EC_GROUP *srvr_group = NULL; 2394 EC_KEY *tkey; 2395 int ecdh_clnt_cert = 0; 2396 int field_size = 0; 2397 2398 if (s->session->sess_cert == NULL) 2399 { 2400 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 2401 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE); 2402 goto err; 2403 } 2404 2405 /* Did we send out the client's 2406 * ECDH share for use in premaster 2407 * computation as part of client certificate? 2408 * If so, set ecdh_clnt_cert to 1. 2409 */ 2410 if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL)) 2411 { 2412 /* XXX: For now, we do not support client 2413 * authentication using ECDH certificates. 2414 * To add such support, one needs to add 2415 * code that checks for appropriate 2416 * conditions and sets ecdh_clnt_cert to 1. 2417 * For example, the cert have an ECC 2418 * key on the same curve as the server's 2419 * and the key should be authorized for 2420 * key agreement. 2421 * 2422 * One also needs to add code in ssl3_connect 2423 * to skip sending the certificate verify 2424 * message. 2425 * 2426 * if ((s->cert->key->privatekey != NULL) && 2427 * (s->cert->key->privatekey->type == 2428 * EVP_PKEY_EC) && ...) 2429 * ecdh_clnt_cert = 1; 2430 */ 2431 } 2432 2433 if (s->session->sess_cert->peer_ecdh_tmp != NULL) 2434 { 2435 tkey = s->session->sess_cert->peer_ecdh_tmp; 2436 } 2437 else 2438 { 2439 /* Get the Server Public Key from Cert */ 2440 srvr_pub_pkey = X509_get_pubkey(s->session-> \ 2441 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509); 2442 if ((srvr_pub_pkey == NULL) || 2443 (srvr_pub_pkey->type != EVP_PKEY_EC) || 2444 (srvr_pub_pkey->pkey.ec == NULL)) 2445 { 2446 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2447 ERR_R_INTERNAL_ERROR); 2448 goto err; 2449 } 2450 2451 tkey = srvr_pub_pkey->pkey.ec; 2452 } 2453 2454 srvr_group = EC_KEY_get0_group(tkey); 2455 srvr_ecpoint = EC_KEY_get0_public_key(tkey); 2456 2457 if ((srvr_group == NULL) || (srvr_ecpoint == NULL)) 2458 { 2459 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2460 ERR_R_INTERNAL_ERROR); 2461 goto err; 2462 } 2463 2464 if ((clnt_ecdh=EC_KEY_new()) == NULL) 2465 { 2466 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2467 goto err; 2468 } 2469 2470 if (!EC_KEY_set_group(clnt_ecdh, srvr_group)) 2471 { 2472 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB); 2473 goto err; 2474 } 2475 if (ecdh_clnt_cert) 2476 { 2477 /* Reuse key info from our certificate 2478 * We only need our private key to perform 2479 * the ECDH computation. 2480 */ 2481 const BIGNUM *priv_key; 2482 tkey = s->cert->key->privatekey->pkey.ec; 2483 priv_key = EC_KEY_get0_private_key(tkey); 2484 if (priv_key == NULL) 2485 { 2486 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2487 goto err; 2488 } 2489 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key)) 2490 { 2491 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB); 2492 goto err; 2493 } 2494 } 2495 else 2496 { 2497 /* Generate a new ECDH key pair */ 2498 if (!(EC_KEY_generate_key(clnt_ecdh))) 2499 { 2500 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB); 2501 goto err; 2502 } 2503 } 2504 2505 /* use the 'p' output buffer for the ECDH key, but 2506 * make sure to clear it out afterwards 2507 */ 2508 2509 field_size = EC_GROUP_get_degree(srvr_group); 2510 if (field_size <= 0) 2511 { 2512 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2513 ERR_R_ECDH_LIB); 2514 goto err; 2515 } 2516 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL); 2517 if (n <= 0) 2518 { 2519 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2520 ERR_R_ECDH_LIB); 2521 goto err; 2522 } 2523 2524 /* generate master key from the result */ 2525 s->session->master_key_length = s->method->ssl3_enc \ 2526 -> generate_master_secret(s, 2527 s->session->master_key, 2528 p, n); 2529 2530 memset(p, 0, n); /* clean up */ 2531 2532 if (ecdh_clnt_cert) 2533 { 2534 /* Send empty client key exch message */ 2535 n = 0; 2536 } 2537 else 2538 { 2539 /* First check the size of encoding and 2540 * allocate memory accordingly. 2541 */ 2542 encoded_pt_len = 2543 EC_POINT_point2oct(srvr_group, 2544 EC_KEY_get0_public_key(clnt_ecdh), 2545 POINT_CONVERSION_UNCOMPRESSED, 2546 NULL, 0, NULL); 2547 2548 encodedPoint = (unsigned char *) 2549 OPENSSL_malloc(encoded_pt_len * 2550 sizeof(unsigned char)); 2551 bn_ctx = BN_CTX_new(); 2552 if ((encodedPoint == NULL) || 2553 (bn_ctx == NULL)) 2554 { 2555 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2556 goto err; 2557 } 2558 2559 /* Encode the public key */ 2560 n = EC_POINT_point2oct(srvr_group, 2561 EC_KEY_get0_public_key(clnt_ecdh), 2562 POINT_CONVERSION_UNCOMPRESSED, 2563 encodedPoint, encoded_pt_len, bn_ctx); 2564 2565 *p = n; /* length of encoded point */ 2566 /* Encoded point will be copied here */ 2567 p += 1; 2568 /* copy the point */ 2569 memcpy((unsigned char *)p, encodedPoint, n); 2570 /* increment n to account for length field */ 2571 n += 1; 2572 } 2573 2574 /* Free allocated memory */ 2575 BN_CTX_free(bn_ctx); 2576 if (encodedPoint != NULL) OPENSSL_free(encodedPoint); 2577 if (clnt_ecdh != NULL) 2578 EC_KEY_free(clnt_ecdh); 2579 EVP_PKEY_free(srvr_pub_pkey); 2580 } 2581#endif /* !OPENSSL_NO_ECDH */ 2582 else if (alg_k & SSL_kGOST) 2583 { 2584 /* GOST key exchange message creation */ 2585 EVP_PKEY_CTX *pkey_ctx; 2586 X509 *peer_cert; 2587 size_t msglen; 2588 unsigned int md_len; 2589 int keytype; 2590 unsigned char premaster_secret[32],shared_ukm[32], tmp[256]; 2591 EVP_MD_CTX *ukm_hash; 2592 EVP_PKEY *pub_key; 2593 2594 /* Get server sertificate PKEY and create ctx from it */ 2595 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST01)].x509; 2596 if (!peer_cert) 2597 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST94)].x509; 2598 if (!peer_cert) { 2599 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER); 2600 goto err; 2601 } 2602 2603 pkey_ctx=EVP_PKEY_CTX_new(pub_key=X509_get_pubkey(peer_cert),NULL); 2604 /* If we have send a certificate, and certificate key 2605 2606 * parameters match those of server certificate, use 2607 * certificate key for key exchange 2608 */ 2609 2610 /* Otherwise, generate ephemeral key pair */ 2611 2612 EVP_PKEY_encrypt_init(pkey_ctx); 2613 /* Generate session key */ 2614 RAND_bytes(premaster_secret,32); 2615 /* If we have client certificate, use its secret as peer key */ 2616 if (s->s3->tmp.cert_req && s->cert->key->privatekey) { 2617 if (EVP_PKEY_derive_set_peer(pkey_ctx,s->cert->key->privatekey) <=0) { 2618 /* If there was an error - just ignore it. Ephemeral key 2619 * would be used 2620 */ 2621 ERR_clear_error(); 2622 } 2623 } 2624 /* Compute shared IV and store it in algorithm-specific 2625 * context data */ 2626 ukm_hash = EVP_MD_CTX_create(); 2627 EVP_DigestInit(ukm_hash,EVP_get_digestbynid(NID_id_GostR3411_94)); 2628 EVP_DigestUpdate(ukm_hash,s->s3->client_random,SSL3_RANDOM_SIZE); 2629 EVP_DigestUpdate(ukm_hash,s->s3->server_random,SSL3_RANDOM_SIZE); 2630 EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len); 2631 EVP_MD_CTX_destroy(ukm_hash); 2632 if (EVP_PKEY_CTX_ctrl(pkey_ctx,-1,EVP_PKEY_OP_ENCRYPT,EVP_PKEY_CTRL_SET_IV, 2633 8,shared_ukm)<0) { 2634 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2635 SSL_R_LIBRARY_BUG); 2636 goto err; 2637 } 2638 /* Make GOST keytransport blob message */ 2639 /*Encapsulate it into sequence */ 2640 *(p++)=V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED; 2641 msglen=255; 2642 if (EVP_PKEY_encrypt(pkey_ctx,tmp,&msglen,premaster_secret,32)<0) { 2643 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2644 SSL_R_LIBRARY_BUG); 2645 goto err; 2646 } 2647 if (msglen >= 0x80) 2648 { 2649 *(p++)=0x81; 2650 *(p++)= msglen & 0xff; 2651 n=msglen+3; 2652 } 2653 else 2654 { 2655 *(p++)= msglen & 0xff; 2656 n=msglen+2; 2657 } 2658 memcpy(p, tmp, msglen); 2659 /* Check if pubkey from client certificate was used */ 2660 if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0) 2661 { 2662 /* Set flag "skip certificate verify" */ 2663 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY; 2664 } 2665 EVP_PKEY_CTX_free(pkey_ctx); 2666 s->session->master_key_length= 2667 s->method->ssl3_enc->generate_master_secret(s, 2668 s->session->master_key,premaster_secret,32); 2669 EVP_PKEY_free(pub_key); 2670 2671 } 2672#ifndef OPENSSL_NO_PSK 2673 else if (alg_k & SSL_kPSK) 2674 { 2675 /* The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes 2676 * to return a \0-terminated identity. The last byte 2677 * is for us for simulating strnlen. */ 2678 char identity[PSK_MAX_IDENTITY_LEN + 2]; 2679 size_t identity_len; 2680 unsigned char *t = NULL; 2681 unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4]; 2682 unsigned int pre_ms_len = 0, psk_len = 0; 2683 int psk_err = 1; 2684 2685 n = 0; 2686 if (s->psk_client_callback == NULL) 2687 { 2688 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2689 SSL_R_PSK_NO_CLIENT_CB); 2690 goto err; 2691 } 2692 2693 memset(identity, 0, sizeof(identity)); 2694 psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint, 2695 identity, sizeof(identity) - 1, 2696 psk_or_pre_ms, sizeof(psk_or_pre_ms)); 2697 if (psk_len > PSK_MAX_PSK_LEN) 2698 { 2699 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2700 ERR_R_INTERNAL_ERROR); 2701 goto psk_err; 2702 } 2703 else if (psk_len == 0) 2704 { 2705 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2706 SSL_R_PSK_IDENTITY_NOT_FOUND); 2707 goto psk_err; 2708 } 2709 identity[PSK_MAX_IDENTITY_LEN + 1] = '\0'; 2710 identity_len = strlen(identity); 2711 if (identity_len > PSK_MAX_IDENTITY_LEN) 2712 { 2713 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2714 ERR_R_INTERNAL_ERROR); 2715 goto psk_err; 2716 } 2717 /* create PSK pre_master_secret */ 2718 pre_ms_len = 2+psk_len+2+psk_len; 2719 t = psk_or_pre_ms; 2720 memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len); 2721 s2n(psk_len, t); 2722 memset(t, 0, psk_len); 2723 t+=psk_len; 2724 s2n(psk_len, t); 2725 2726 if (s->session->psk_identity_hint != NULL) 2727 OPENSSL_free(s->session->psk_identity_hint); 2728 s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint); 2729 if (s->ctx->psk_identity_hint != NULL && 2730 s->session->psk_identity_hint == NULL) 2731 { 2732 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2733 ERR_R_MALLOC_FAILURE); 2734 goto psk_err; 2735 } 2736 2737 if (s->session->psk_identity != NULL) 2738 OPENSSL_free(s->session->psk_identity); 2739 s->session->psk_identity = BUF_strdup(identity); 2740 if (s->session->psk_identity == NULL) 2741 { 2742 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2743 ERR_R_MALLOC_FAILURE); 2744 goto psk_err; 2745 } 2746 2747 s->session->master_key_length = 2748 s->method->ssl3_enc->generate_master_secret(s, 2749 s->session->master_key, 2750 psk_or_pre_ms, pre_ms_len); 2751 s2n(identity_len, p); 2752 memcpy(p, identity, identity_len); 2753 n = 2 + identity_len; 2754 psk_err = 0; 2755 psk_err: 2756 OPENSSL_cleanse(identity, sizeof(identity)); 2757 OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms)); 2758 if (psk_err != 0) 2759 { 2760 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); 2761 goto err; 2762 } 2763 } 2764#endif 2765 else 2766 { 2767 ssl3_send_alert(s, SSL3_AL_FATAL, 2768 SSL_AD_HANDSHAKE_FAILURE); 2769 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2770 ERR_R_INTERNAL_ERROR); 2771 goto err; 2772 } 2773 2774 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE; 2775 l2n3(n,d); 2776 2777 s->state=SSL3_ST_CW_KEY_EXCH_B; 2778 /* number of bytes to write */ 2779 s->init_num=n+4; 2780 s->init_off=0; 2781 } 2782 2783 /* SSL3_ST_CW_KEY_EXCH_B */ 2784 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 2785err: 2786#ifndef OPENSSL_NO_ECDH 2787 BN_CTX_free(bn_ctx); 2788 if (encodedPoint != NULL) OPENSSL_free(encodedPoint); 2789 if (clnt_ecdh != NULL) 2790 EC_KEY_free(clnt_ecdh); 2791 EVP_PKEY_free(srvr_pub_pkey); 2792#endif 2793 return(-1); 2794 } 2795 2796int ssl3_send_client_verify(SSL *s) 2797 { 2798 unsigned char *p,*d; 2799 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH]; 2800 EVP_PKEY *pkey; 2801 EVP_PKEY_CTX *pctx=NULL; 2802#ifndef OPENSSL_NO_RSA 2803 unsigned u=0; 2804#endif 2805 unsigned long n; 2806 int j; 2807 2808 if (s->state == SSL3_ST_CW_CERT_VRFY_A) 2809 { 2810 d=(unsigned char *)s->init_buf->data; 2811 p= &(d[4]); 2812 pkey=s->cert->key->privatekey; 2813/* Create context from key and test if sha1 is allowed as digest */ 2814 pctx = EVP_PKEY_CTX_new(pkey,NULL); 2815 EVP_PKEY_sign_init(pctx); 2816 if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1())>0) 2817 { 2818 s->method->ssl3_enc->cert_verify_mac(s, 2819 NID_sha1, 2820 &(data[MD5_DIGEST_LENGTH])); 2821 } 2822 else 2823 { 2824 ERR_clear_error(); 2825 } 2826#ifndef OPENSSL_NO_RSA 2827 if (pkey->type == EVP_PKEY_RSA) 2828 { 2829 s->method->ssl3_enc->cert_verify_mac(s, 2830 NID_md5, 2831 &(data[0])); 2832 if (RSA_sign(NID_md5_sha1, data, 2833 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH, 2834 &(p[2]), &u, pkey->pkey.rsa) <= 0 ) 2835 { 2836 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB); 2837 goto err; 2838 } 2839 s2n(u,p); 2840 n=u+2; 2841 } 2842 else 2843#endif 2844#ifndef OPENSSL_NO_DSA 2845 if (pkey->type == EVP_PKEY_DSA) 2846 { 2847 if (!DSA_sign(pkey->save_type, 2848 &(data[MD5_DIGEST_LENGTH]), 2849 SHA_DIGEST_LENGTH,&(p[2]), 2850 (unsigned int *)&j,pkey->pkey.dsa)) 2851 { 2852 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB); 2853 goto err; 2854 } 2855 s2n(j,p); 2856 n=j+2; 2857 } 2858 else 2859#endif 2860#ifndef OPENSSL_NO_ECDSA 2861 if (pkey->type == EVP_PKEY_EC) 2862 { 2863 if (!ECDSA_sign(pkey->save_type, 2864 &(data[MD5_DIGEST_LENGTH]), 2865 SHA_DIGEST_LENGTH,&(p[2]), 2866 (unsigned int *)&j,pkey->pkey.ec)) 2867 { 2868 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, 2869 ERR_R_ECDSA_LIB); 2870 goto err; 2871 } 2872 s2n(j,p); 2873 n=j+2; 2874 } 2875 else 2876#endif 2877 if (pkey->type == NID_id_GostR3410_94 || pkey->type == NID_id_GostR3410_2001) 2878 { 2879 unsigned char signbuf[64]; 2880 int i; 2881 size_t sigsize=64; 2882 s->method->ssl3_enc->cert_verify_mac(s, 2883 NID_id_GostR3411_94, 2884 data); 2885 if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) { 2886 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, 2887 ERR_R_INTERNAL_ERROR); 2888 goto err; 2889 } 2890 for (i=63,j=0; i>=0; j++, i--) { 2891 p[2+j]=signbuf[i]; 2892 } 2893 s2n(j,p); 2894 n=j+2; 2895 } 2896 else 2897 { 2898 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR); 2899 goto err; 2900 } 2901 *(d++)=SSL3_MT_CERTIFICATE_VERIFY; 2902 l2n3(n,d); 2903 2904 s->state=SSL3_ST_CW_CERT_VRFY_B; 2905 s->init_num=(int)n+4; 2906 s->init_off=0; 2907 } 2908 EVP_PKEY_CTX_free(pctx); 2909 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 2910err: 2911 EVP_PKEY_CTX_free(pctx); 2912 return(-1); 2913 } 2914 2915int ssl3_send_client_certificate(SSL *s) 2916 { 2917 X509 *x509=NULL; 2918 EVP_PKEY *pkey=NULL; 2919 int i; 2920 unsigned long l; 2921 2922 if (s->state == SSL3_ST_CW_CERT_A) 2923 { 2924 if ((s->cert == NULL) || 2925 (s->cert->key->x509 == NULL) || 2926 (s->cert->key->privatekey == NULL)) 2927 s->state=SSL3_ST_CW_CERT_B; 2928 else 2929 s->state=SSL3_ST_CW_CERT_C; 2930 } 2931 2932 /* We need to get a client cert */ 2933 if (s->state == SSL3_ST_CW_CERT_B) 2934 { 2935 /* If we get an error, we need to 2936 * ssl->rwstate=SSL_X509_LOOKUP; return(-1); 2937 * We then get retied later */ 2938 i=0; 2939 i = ssl_do_client_cert_cb(s, &x509, &pkey); 2940 if (i < 0) 2941 { 2942 s->rwstate=SSL_X509_LOOKUP; 2943 return(-1); 2944 } 2945 s->rwstate=SSL_NOTHING; 2946 if ((i == 1) && (pkey != NULL) && (x509 != NULL)) 2947 { 2948 s->state=SSL3_ST_CW_CERT_B; 2949 if ( !SSL_use_certificate(s,x509) || 2950 !SSL_use_PrivateKey(s,pkey)) 2951 i=0; 2952 } 2953 else if (i == 1) 2954 { 2955 i=0; 2956 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); 2957 } 2958 2959 if (x509 != NULL) X509_free(x509); 2960 if (pkey != NULL) EVP_PKEY_free(pkey); 2961 if (i == 0) 2962 { 2963 if (s->version == SSL3_VERSION) 2964 { 2965 s->s3->tmp.cert_req=0; 2966 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE); 2967 return(1); 2968 } 2969 else 2970 { 2971 s->s3->tmp.cert_req=2; 2972 } 2973 } 2974 2975 /* Ok, we have a cert */ 2976 s->state=SSL3_ST_CW_CERT_C; 2977 } 2978 2979 if (s->state == SSL3_ST_CW_CERT_C) 2980 { 2981 s->state=SSL3_ST_CW_CERT_D; 2982 l=ssl3_output_cert_chain(s, 2983 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509); 2984 if (!l) 2985 { 2986 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR); 2987 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR); 2988 return 0; 2989 } 2990 s->init_num=(int)l; 2991 s->init_off=0; 2992 } 2993 /* SSL3_ST_CW_CERT_D */ 2994 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 2995 } 2996 2997#define has_bits(i,m) (((i)&(m)) == (m)) 2998 2999int ssl3_check_cert_and_algorithm(SSL *s) 3000 { 3001 int i,idx; 3002 long alg_k,alg_a; 3003 EVP_PKEY *pkey=NULL; 3004 SESS_CERT *sc; 3005#ifndef OPENSSL_NO_RSA 3006 RSA *rsa; 3007#endif 3008#ifndef OPENSSL_NO_DH 3009 DH *dh; 3010#endif 3011 3012 alg_k=s->s3->tmp.new_cipher->algorithm_mkey; 3013 alg_a=s->s3->tmp.new_cipher->algorithm_auth; 3014 3015 /* we don't have a certificate */ 3016 if ((alg_a & (SSL_aDH|SSL_aNULL|SSL_aKRB5)) || (alg_k & SSL_kPSK)) 3017 return(1); 3018 3019 sc=s->session->sess_cert; 3020 if (sc == NULL) 3021 { 3022 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR); 3023 goto err; 3024 } 3025 3026#ifndef OPENSSL_NO_RSA 3027 rsa=s->session->sess_cert->peer_rsa_tmp; 3028#endif 3029#ifndef OPENSSL_NO_DH 3030 dh=s->session->sess_cert->peer_dh_tmp; 3031#endif 3032 3033 /* This is the passed certificate */ 3034 3035 idx=sc->peer_cert_type; 3036#ifndef OPENSSL_NO_ECDH 3037 if (idx == SSL_PKEY_ECC) 3038 { 3039 if (ssl_check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509, 3040 s->s3->tmp.new_cipher) == 0) 3041 { /* check failed */ 3042 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT); 3043 goto f_err; 3044 } 3045 else 3046 { 3047 return 1; 3048 } 3049 } 3050#endif 3051 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509); 3052 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey); 3053 EVP_PKEY_free(pkey); 3054 3055 3056 /* Check that we have a certificate if we require one */ 3057 if ((alg_a & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN)) 3058 { 3059 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT); 3060 goto f_err; 3061 } 3062#ifndef OPENSSL_NO_DSA 3063 else if ((alg_a & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN)) 3064 { 3065 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT); 3066 goto f_err; 3067 } 3068#endif 3069#ifndef OPENSSL_NO_RSA 3070 if ((alg_k & SSL_kRSA) && 3071 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL))) 3072 { 3073 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT); 3074 goto f_err; 3075 } 3076#endif 3077#ifndef OPENSSL_NO_DH 3078 if ((alg_k & SSL_kEDH) && 3079 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL))) 3080 { 3081 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY); 3082 goto f_err; 3083 } 3084 else if ((alg_k & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA)) 3085 { 3086 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT); 3087 goto f_err; 3088 } 3089#ifndef OPENSSL_NO_DSA 3090 else if ((alg_k & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA)) 3091 { 3092 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT); 3093 goto f_err; 3094 } 3095#endif 3096#endif 3097 3098 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP)) 3099 { 3100#ifndef OPENSSL_NO_RSA 3101 if (alg_k & SSL_kRSA) 3102 { 3103 if (rsa == NULL 3104 || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) 3105 { 3106 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY); 3107 goto f_err; 3108 } 3109 } 3110 else 3111#endif 3112#ifndef OPENSSL_NO_DH 3113 if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) 3114 { 3115 if (dh == NULL 3116 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) 3117 { 3118 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY); 3119 goto f_err; 3120 } 3121 } 3122 else 3123#endif 3124 { 3125 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE); 3126 goto f_err; 3127 } 3128 } 3129 return(1); 3130f_err: 3131 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); 3132err: 3133 return(0); 3134 } 3135 3136/* Check to see if handshake is full or resumed. Usually this is just a 3137 * case of checking to see if a cache hit has occurred. In the case of 3138 * session tickets we have to check the next message to be sure. 3139 */ 3140 3141#ifndef OPENSSL_NO_TLSEXT 3142int ssl3_check_finished(SSL *s) 3143 { 3144 int ok; 3145 long n; 3146 /* If we have no ticket it cannot be a resumed session. */ 3147 if (!s->session->tlsext_tick) 3148 return 1; 3149 /* this function is called when we really expect a Certificate 3150 * message, so permit appropriate message length */ 3151 n=s->method->ssl_get_message(s, 3152 SSL3_ST_CR_CERT_A, 3153 SSL3_ST_CR_CERT_B, 3154 -1, 3155 s->max_cert_list, 3156 &ok); 3157 if (!ok) return((int)n); 3158 s->s3->tmp.reuse_message = 1; 3159 if ((s->s3->tmp.message_type == SSL3_MT_FINISHED) 3160 || (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET)) 3161 return 2; 3162 3163 return 1; 3164 } 3165#endif 3166 3167int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey) 3168 { 3169 int i = 0; 3170#ifndef OPENSSL_NO_ENGINE 3171 if (s->ctx->client_cert_engine) 3172 { 3173 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s, 3174 SSL_get_client_CA_list(s), 3175 px509, ppkey, NULL, NULL, NULL); 3176 if (i != 0) 3177 return i; 3178 } 3179#endif 3180 if (s->ctx->client_cert_cb) 3181 i = s->ctx->client_cert_cb(s,px509,ppkey); 3182 return i; 3183 } 3184