s3_clnt.c revision 271304
1/* ssl/s3_clnt.c */ 2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay@cryptsoft.com). 7 * The implementation was written so as to conform with Netscapes SSL. 8 * 9 * This library is free for commercial and non-commercial use as long as 10 * the following conditions are aheared to. The following conditions 11 * apply to all code found in this distribution, be it the RC4, RSA, 12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13 * included with this distribution is covered by the same copyright terms 14 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15 * 16 * Copyright remains Eric Young's, and as such any Copyright notices in 17 * the code are not to be removed. 18 * If this package is used in a product, Eric Young should be given attribution 19 * as the author of the parts of the library used. 20 * This can be in the form of a textual message at program startup or 21 * in documentation (online or textual) provided with the package. 22 * 23 * Redistribution and use in source and binary forms, with or without 24 * modification, are permitted provided that the following conditions 25 * are met: 26 * 1. Redistributions of source code must retain the copyright 27 * notice, this list of conditions and the following disclaimer. 28 * 2. Redistributions in binary form must reproduce the above copyright 29 * notice, this list of conditions and the following disclaimer in the 30 * documentation and/or other materials provided with the distribution. 31 * 3. All advertising materials mentioning features or use of this software 32 * must display the following acknowledgement: 33 * "This product includes cryptographic software written by 34 * Eric Young (eay@cryptsoft.com)" 35 * The word 'cryptographic' can be left out if the rouines from the library 36 * being used are not cryptographic related :-). 37 * 4. If you include any Windows specific code (or a derivative thereof) from 38 * the apps directory (application code) you must include an acknowledgement: 39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40 * 41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51 * SUCH DAMAGE. 52 * 53 * The licence and distribution terms for any publically available version or 54 * derivative of this code cannot be changed. i.e. this code cannot simply be 55 * copied and put under another distribution licence 56 * [including the GNU Public Licence.] 57 */ 58/* ==================================================================== 59 * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved. 60 * 61 * Redistribution and use in source and binary forms, with or without 62 * modification, are permitted provided that the following conditions 63 * are met: 64 * 65 * 1. Redistributions of source code must retain the above copyright 66 * notice, this list of conditions and the following disclaimer. 67 * 68 * 2. Redistributions in binary form must reproduce the above copyright 69 * notice, this list of conditions and the following disclaimer in 70 * the documentation and/or other materials provided with the 71 * distribution. 72 * 73 * 3. All advertising materials mentioning features or use of this 74 * software must display the following acknowledgment: 75 * "This product includes software developed by the OpenSSL Project 76 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" 77 * 78 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 79 * endorse or promote products derived from this software without 80 * prior written permission. For written permission, please contact 81 * openssl-core@openssl.org. 82 * 83 * 5. Products derived from this software may not be called "OpenSSL" 84 * nor may "OpenSSL" appear in their names without prior written 85 * permission of the OpenSSL Project. 86 * 87 * 6. Redistributions of any form whatsoever must retain the following 88 * acknowledgment: 89 * "This product includes software developed by the OpenSSL Project 90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)" 91 * 92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 103 * OF THE POSSIBILITY OF SUCH DAMAGE. 104 * ==================================================================== 105 * 106 * This product includes cryptographic software written by Eric Young 107 * (eay@cryptsoft.com). This product includes software written by Tim 108 * Hudson (tjh@cryptsoft.com). 109 * 110 */ 111/* ==================================================================== 112 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. 113 * 114 * Portions of the attached software ("Contribution") are developed by 115 * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project. 116 * 117 * The Contribution is licensed pursuant to the OpenSSL open source 118 * license provided above. 119 * 120 * ECC cipher suite support in OpenSSL originally written by 121 * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories. 122 * 123 */ 124/* ==================================================================== 125 * Copyright 2005 Nokia. All rights reserved. 126 * 127 * The portions of the attached software ("Contribution") is developed by 128 * Nokia Corporation and is licensed pursuant to the OpenSSL open source 129 * license. 130 * 131 * The Contribution, originally written by Mika Kousa and Pasi Eronen of 132 * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites 133 * support (see RFC 4279) to OpenSSL. 134 * 135 * No patent licenses or other rights except those expressly stated in 136 * the OpenSSL open source license shall be deemed granted or received 137 * expressly, by implication, estoppel, or otherwise. 138 * 139 * No assurances are provided by Nokia that the Contribution does not 140 * infringe the patent or other intellectual property rights of any third 141 * party or that the license provides you with all the necessary rights 142 * to make use of the Contribution. 143 * 144 * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN 145 * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA 146 * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY 147 * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR 148 * OTHERWISE. 149 */ 150 151#include <stdio.h> 152#include "ssl_locl.h" 153#include "kssl_lcl.h" 154#include <openssl/buffer.h> 155#include <openssl/rand.h> 156#include <openssl/objects.h> 157#include <openssl/evp.h> 158#include <openssl/md5.h> 159#ifdef OPENSSL_FIPS 160#include <openssl/fips.h> 161#endif 162#ifndef OPENSSL_NO_DH 163#include <openssl/dh.h> 164#endif 165#include <openssl/bn.h> 166#ifndef OPENSSL_NO_ENGINE 167#include <openssl/engine.h> 168#endif 169 170static const SSL_METHOD *ssl3_get_client_method(int ver); 171static int ca_dn_cmp(const X509_NAME * const *a,const X509_NAME * const *b); 172 173static const SSL_METHOD *ssl3_get_client_method(int ver) 174 { 175 if (ver == SSL3_VERSION) 176 return(SSLv3_client_method()); 177 else 178 return(NULL); 179 } 180 181IMPLEMENT_ssl3_meth_func(SSLv3_client_method, 182 ssl_undefined_function, 183 ssl3_connect, 184 ssl3_get_client_method) 185 186int ssl3_connect(SSL *s) 187 { 188 BUF_MEM *buf=NULL; 189 unsigned long Time=(unsigned long)time(NULL); 190 void (*cb)(const SSL *ssl,int type,int val)=NULL; 191 int ret= -1; 192 int new_state,state,skip=0; 193 194 RAND_add(&Time,sizeof(Time),0); 195 ERR_clear_error(); 196 clear_sys_error(); 197 198 if (s->info_callback != NULL) 199 cb=s->info_callback; 200 else if (s->ctx->info_callback != NULL) 201 cb=s->ctx->info_callback; 202 203 s->in_handshake++; 204 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); 205 206#ifndef OPENSSL_NO_HEARTBEATS 207 /* If we're awaiting a HeartbeatResponse, pretend we 208 * already got and don't await it anymore, because 209 * Heartbeats don't make sense during handshakes anyway. 210 */ 211 if (s->tlsext_hb_pending) 212 { 213 s->tlsext_hb_pending = 0; 214 s->tlsext_hb_seq++; 215 } 216#endif 217 218 for (;;) 219 { 220 state=s->state; 221 222 switch(s->state) 223 { 224 case SSL_ST_RENEGOTIATE: 225 s->renegotiate=1; 226 s->state=SSL_ST_CONNECT; 227 s->ctx->stats.sess_connect_renegotiate++; 228 /* break */ 229 case SSL_ST_BEFORE: 230 case SSL_ST_CONNECT: 231 case SSL_ST_BEFORE|SSL_ST_CONNECT: 232 case SSL_ST_OK|SSL_ST_CONNECT: 233 234 s->server=0; 235 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1); 236 237 if ((s->version & 0xff00 ) != 0x0300) 238 { 239 SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR); 240 ret = -1; 241 goto end; 242 } 243 244 /* s->version=SSL3_VERSION; */ 245 s->type=SSL_ST_CONNECT; 246 247 if (s->init_buf == NULL) 248 { 249 if ((buf=BUF_MEM_new()) == NULL) 250 { 251 ret= -1; 252 goto end; 253 } 254 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH)) 255 { 256 ret= -1; 257 goto end; 258 } 259 s->init_buf=buf; 260 buf=NULL; 261 } 262 263 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; } 264 265 /* setup buffing BIO */ 266 if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; } 267 268 /* don't push the buffering BIO quite yet */ 269 270 ssl3_init_finished_mac(s); 271 272 s->state=SSL3_ST_CW_CLNT_HELLO_A; 273 s->ctx->stats.sess_connect++; 274 s->init_num=0; 275 break; 276 277 case SSL3_ST_CW_CLNT_HELLO_A: 278 case SSL3_ST_CW_CLNT_HELLO_B: 279 280 s->shutdown=0; 281 ret=ssl3_client_hello(s); 282 if (ret <= 0) goto end; 283 s->state=SSL3_ST_CR_SRVR_HELLO_A; 284 s->init_num=0; 285 286 /* turn on buffering for the next lot of output */ 287 if (s->bbio != s->wbio) 288 s->wbio=BIO_push(s->bbio,s->wbio); 289 290 break; 291 292 case SSL3_ST_CR_SRVR_HELLO_A: 293 case SSL3_ST_CR_SRVR_HELLO_B: 294 ret=ssl3_get_server_hello(s); 295 if (ret <= 0) goto end; 296 297 if (s->hit) 298 { 299 s->state=SSL3_ST_CR_FINISHED_A; 300#ifndef OPENSSL_NO_TLSEXT 301 if (s->tlsext_ticket_expected) 302 { 303 /* receive renewed session ticket */ 304 s->state=SSL3_ST_CR_SESSION_TICKET_A; 305 } 306#endif 307 } 308 else 309 s->state=SSL3_ST_CR_CERT_A; 310 s->init_num=0; 311 break; 312 313 case SSL3_ST_CR_CERT_A: 314 case SSL3_ST_CR_CERT_B: 315#ifndef OPENSSL_NO_TLSEXT 316 ret=ssl3_check_finished(s); 317 if (ret <= 0) goto end; 318 if (ret == 2) 319 { 320 s->hit = 1; 321 if (s->tlsext_ticket_expected) 322 s->state=SSL3_ST_CR_SESSION_TICKET_A; 323 else 324 s->state=SSL3_ST_CR_FINISHED_A; 325 s->init_num=0; 326 break; 327 } 328#endif 329 /* Check if it is anon DH/ECDH */ 330 /* or PSK */ 331 if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) && 332 !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) 333 { 334 ret=ssl3_get_server_certificate(s); 335 if (ret <= 0) goto end; 336#ifndef OPENSSL_NO_TLSEXT 337 if (s->tlsext_status_expected) 338 s->state=SSL3_ST_CR_CERT_STATUS_A; 339 else 340 s->state=SSL3_ST_CR_KEY_EXCH_A; 341 } 342 else 343 { 344 skip = 1; 345 s->state=SSL3_ST_CR_KEY_EXCH_A; 346 } 347#else 348 } 349 else 350 skip=1; 351 352 s->state=SSL3_ST_CR_KEY_EXCH_A; 353#endif 354 s->init_num=0; 355 break; 356 357 case SSL3_ST_CR_KEY_EXCH_A: 358 case SSL3_ST_CR_KEY_EXCH_B: 359 ret=ssl3_get_key_exchange(s); 360 if (ret <= 0) goto end; 361 s->state=SSL3_ST_CR_CERT_REQ_A; 362 s->init_num=0; 363 364 /* at this point we check that we have the 365 * required stuff from the server */ 366 if (!ssl3_check_cert_and_algorithm(s)) 367 { 368 ret= -1; 369 goto end; 370 } 371 break; 372 373 case SSL3_ST_CR_CERT_REQ_A: 374 case SSL3_ST_CR_CERT_REQ_B: 375 ret=ssl3_get_certificate_request(s); 376 if (ret <= 0) goto end; 377 s->state=SSL3_ST_CR_SRVR_DONE_A; 378 s->init_num=0; 379 break; 380 381 case SSL3_ST_CR_SRVR_DONE_A: 382 case SSL3_ST_CR_SRVR_DONE_B: 383 ret=ssl3_get_server_done(s); 384 if (ret <= 0) goto end; 385#ifndef OPENSSL_NO_SRP 386 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) 387 { 388 if ((ret = SRP_Calc_A_param(s))<=0) 389 { 390 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_SRP_A_CALC); 391 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR); 392 goto end; 393 } 394 } 395#endif 396 if (s->s3->tmp.cert_req) 397 s->state=SSL3_ST_CW_CERT_A; 398 else 399 s->state=SSL3_ST_CW_KEY_EXCH_A; 400 s->init_num=0; 401 402 break; 403 404 case SSL3_ST_CW_CERT_A: 405 case SSL3_ST_CW_CERT_B: 406 case SSL3_ST_CW_CERT_C: 407 case SSL3_ST_CW_CERT_D: 408 ret=ssl3_send_client_certificate(s); 409 if (ret <= 0) goto end; 410 s->state=SSL3_ST_CW_KEY_EXCH_A; 411 s->init_num=0; 412 break; 413 414 case SSL3_ST_CW_KEY_EXCH_A: 415 case SSL3_ST_CW_KEY_EXCH_B: 416 ret=ssl3_send_client_key_exchange(s); 417 if (ret <= 0) goto end; 418 /* EAY EAY EAY need to check for DH fix cert 419 * sent back */ 420 /* For TLS, cert_req is set to 2, so a cert chain 421 * of nothing is sent, but no verify packet is sent */ 422 /* XXX: For now, we do not support client 423 * authentication in ECDH cipher suites with 424 * ECDH (rather than ECDSA) certificates. 425 * We need to skip the certificate verify 426 * message when client's ECDH public key is sent 427 * inside the client certificate. 428 */ 429 if (s->s3->tmp.cert_req == 1) 430 { 431 s->state=SSL3_ST_CW_CERT_VRFY_A; 432 } 433 else 434 { 435 s->state=SSL3_ST_CW_CHANGE_A; 436 s->s3->change_cipher_spec=0; 437 } 438 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) 439 { 440 s->state=SSL3_ST_CW_CHANGE_A; 441 s->s3->change_cipher_spec=0; 442 } 443 444 s->init_num=0; 445 break; 446 447 case SSL3_ST_CW_CERT_VRFY_A: 448 case SSL3_ST_CW_CERT_VRFY_B: 449 ret=ssl3_send_client_verify(s); 450 if (ret <= 0) goto end; 451 s->state=SSL3_ST_CW_CHANGE_A; 452 s->init_num=0; 453 s->s3->change_cipher_spec=0; 454 break; 455 456 case SSL3_ST_CW_CHANGE_A: 457 case SSL3_ST_CW_CHANGE_B: 458 ret=ssl3_send_change_cipher_spec(s, 459 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B); 460 if (ret <= 0) goto end; 461 462#if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG) 463 s->state=SSL3_ST_CW_FINISHED_A; 464#else 465 if (s->s3->next_proto_neg_seen) 466 s->state=SSL3_ST_CW_NEXT_PROTO_A; 467 else 468 s->state=SSL3_ST_CW_FINISHED_A; 469#endif 470 s->init_num=0; 471 472 s->session->cipher=s->s3->tmp.new_cipher; 473#ifdef OPENSSL_NO_COMP 474 s->session->compress_meth=0; 475#else 476 if (s->s3->tmp.new_compression == NULL) 477 s->session->compress_meth=0; 478 else 479 s->session->compress_meth= 480 s->s3->tmp.new_compression->id; 481#endif 482 if (!s->method->ssl3_enc->setup_key_block(s)) 483 { 484 ret= -1; 485 goto end; 486 } 487 488 if (!s->method->ssl3_enc->change_cipher_state(s, 489 SSL3_CHANGE_CIPHER_CLIENT_WRITE)) 490 { 491 ret= -1; 492 goto end; 493 } 494 495 break; 496 497#if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG) 498 case SSL3_ST_CW_NEXT_PROTO_A: 499 case SSL3_ST_CW_NEXT_PROTO_B: 500 ret=ssl3_send_next_proto(s); 501 if (ret <= 0) goto end; 502 s->state=SSL3_ST_CW_FINISHED_A; 503 break; 504#endif 505 506 case SSL3_ST_CW_FINISHED_A: 507 case SSL3_ST_CW_FINISHED_B: 508 ret=ssl3_send_finished(s, 509 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B, 510 s->method->ssl3_enc->client_finished_label, 511 s->method->ssl3_enc->client_finished_label_len); 512 if (ret <= 0) goto end; 513 s->state=SSL3_ST_CW_FLUSH; 514 515 /* clear flags */ 516 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER; 517 if (s->hit) 518 { 519 s->s3->tmp.next_state=SSL_ST_OK; 520 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED) 521 { 522 s->state=SSL_ST_OK; 523 s->s3->flags|=SSL3_FLAGS_POP_BUFFER; 524 s->s3->delay_buf_pop_ret=0; 525 } 526 } 527 else 528 { 529#ifndef OPENSSL_NO_TLSEXT 530 /* Allow NewSessionTicket if ticket expected */ 531 if (s->tlsext_ticket_expected) 532 s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A; 533 else 534#endif 535 536 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A; 537 } 538 s->init_num=0; 539 break; 540 541#ifndef OPENSSL_NO_TLSEXT 542 case SSL3_ST_CR_SESSION_TICKET_A: 543 case SSL3_ST_CR_SESSION_TICKET_B: 544 ret=ssl3_get_new_session_ticket(s); 545 if (ret <= 0) goto end; 546 s->state=SSL3_ST_CR_FINISHED_A; 547 s->init_num=0; 548 break; 549 550 case SSL3_ST_CR_CERT_STATUS_A: 551 case SSL3_ST_CR_CERT_STATUS_B: 552 ret=ssl3_get_cert_status(s); 553 if (ret <= 0) goto end; 554 s->state=SSL3_ST_CR_KEY_EXCH_A; 555 s->init_num=0; 556 break; 557#endif 558 559 case SSL3_ST_CR_FINISHED_A: 560 case SSL3_ST_CR_FINISHED_B: 561 562 s->s3->flags |= SSL3_FLAGS_CCS_OK; 563 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A, 564 SSL3_ST_CR_FINISHED_B); 565 if (ret <= 0) goto end; 566 567 if (s->hit) 568 s->state=SSL3_ST_CW_CHANGE_A; 569 else 570 s->state=SSL_ST_OK; 571 s->init_num=0; 572 break; 573 574 case SSL3_ST_CW_FLUSH: 575 s->rwstate=SSL_WRITING; 576 if (BIO_flush(s->wbio) <= 0) 577 { 578 ret= -1; 579 goto end; 580 } 581 s->rwstate=SSL_NOTHING; 582 s->state=s->s3->tmp.next_state; 583 break; 584 585 case SSL_ST_OK: 586 /* clean a few things up */ 587 ssl3_cleanup_key_block(s); 588 589 if (s->init_buf != NULL) 590 { 591 BUF_MEM_free(s->init_buf); 592 s->init_buf=NULL; 593 } 594 595 /* If we are not 'joining' the last two packets, 596 * remove the buffering now */ 597 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER)) 598 ssl_free_wbio_buffer(s); 599 /* else do it later in ssl3_write */ 600 601 s->init_num=0; 602 s->renegotiate=0; 603 s->new_session=0; 604 605 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT); 606 if (s->hit) s->ctx->stats.sess_hit++; 607 608 ret=1; 609 /* s->server=0; */ 610 s->handshake_func=ssl3_connect; 611 s->ctx->stats.sess_connect_good++; 612 613 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1); 614 615 goto end; 616 /* break; */ 617 618 default: 619 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE); 620 ret= -1; 621 goto end; 622 /* break; */ 623 } 624 625 /* did we do anything */ 626 if (!s->s3->tmp.reuse_message && !skip) 627 { 628 if (s->debug) 629 { 630 if ((ret=BIO_flush(s->wbio)) <= 0) 631 goto end; 632 } 633 634 if ((cb != NULL) && (s->state != state)) 635 { 636 new_state=s->state; 637 s->state=state; 638 cb(s,SSL_CB_CONNECT_LOOP,1); 639 s->state=new_state; 640 } 641 } 642 skip=0; 643 } 644end: 645 s->in_handshake--; 646 if (buf != NULL) 647 BUF_MEM_free(buf); 648 if (cb != NULL) 649 cb(s,SSL_CB_CONNECT_EXIT,ret); 650 return(ret); 651 } 652 653 654int ssl3_client_hello(SSL *s) 655 { 656 unsigned char *buf; 657 unsigned char *p,*d; 658 int i; 659 unsigned long Time,l; 660#ifndef OPENSSL_NO_COMP 661 int j; 662 SSL_COMP *comp; 663#endif 664 665 buf=(unsigned char *)s->init_buf->data; 666 if (s->state == SSL3_ST_CW_CLNT_HELLO_A) 667 { 668 SSL_SESSION *sess = s->session; 669 if ((sess == NULL) || 670 (sess->ssl_version != s->version) || 671#ifdef OPENSSL_NO_TLSEXT 672 !sess->session_id_length || 673#else 674 (!sess->session_id_length && !sess->tlsext_tick) || 675#endif 676 (sess->not_resumable)) 677 { 678 if (!ssl_get_new_session(s,0)) 679 goto err; 680 } 681 /* else use the pre-loaded session */ 682 683 p=s->s3->client_random; 684 Time=(unsigned long)time(NULL); /* Time */ 685 l2n(Time,p); 686 if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0) 687 goto err; 688 689 /* Do the message type and length last */ 690 d=p= &(buf[4]); 691 692 /* version indicates the negotiated version: for example from 693 * an SSLv2/v3 compatible client hello). The client_version 694 * field is the maximum version we permit and it is also 695 * used in RSA encrypted premaster secrets. Some servers can 696 * choke if we initially report a higher version then 697 * renegotiate to a lower one in the premaster secret. This 698 * didn't happen with TLS 1.0 as most servers supported it 699 * but it can with TLS 1.1 or later if the server only supports 700 * 1.0. 701 * 702 * Possible scenario with previous logic: 703 * 1. Client hello indicates TLS 1.2 704 * 2. Server hello says TLS 1.0 705 * 3. RSA encrypted premaster secret uses 1.2. 706 * 4. Handhaked proceeds using TLS 1.0. 707 * 5. Server sends hello request to renegotiate. 708 * 6. Client hello indicates TLS v1.0 as we now 709 * know that is maximum server supports. 710 * 7. Server chokes on RSA encrypted premaster secret 711 * containing version 1.0. 712 * 713 * For interoperability it should be OK to always use the 714 * maximum version we support in client hello and then rely 715 * on the checking of version to ensure the servers isn't 716 * being inconsistent: for example initially negotiating with 717 * TLS 1.0 and renegotiating with TLS 1.2. We do this by using 718 * client_version in client hello and not resetting it to 719 * the negotiated version. 720 */ 721#if 0 722 *(p++)=s->version>>8; 723 *(p++)=s->version&0xff; 724 s->client_version=s->version; 725#else 726 *(p++)=s->client_version>>8; 727 *(p++)=s->client_version&0xff; 728#endif 729 730 /* Random stuff */ 731 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE); 732 p+=SSL3_RANDOM_SIZE; 733 734 /* Session ID */ 735 if (s->new_session) 736 i=0; 737 else 738 i=s->session->session_id_length; 739 *(p++)=i; 740 if (i != 0) 741 { 742 if (i > (int)sizeof(s->session->session_id)) 743 { 744 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); 745 goto err; 746 } 747 memcpy(p,s->session->session_id,i); 748 p+=i; 749 } 750 751 /* Ciphers supported */ 752 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0); 753 if (i == 0) 754 { 755 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE); 756 goto err; 757 } 758#ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH 759 /* Some servers hang if client hello > 256 bytes 760 * as hack workaround chop number of supported ciphers 761 * to keep it well below this if we use TLS v1.2 762 */ 763 if (TLS1_get_version(s) >= TLS1_2_VERSION 764 && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH) 765 i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1; 766#endif 767 s2n(i,p); 768 p+=i; 769 770 /* COMPRESSION */ 771#ifdef OPENSSL_NO_COMP 772 *(p++)=1; 773#else 774 775 if ((s->options & SSL_OP_NO_COMPRESSION) 776 || !s->ctx->comp_methods) 777 j=0; 778 else 779 j=sk_SSL_COMP_num(s->ctx->comp_methods); 780 *(p++)=1+j; 781 for (i=0; i<j; i++) 782 { 783 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i); 784 *(p++)=comp->id; 785 } 786#endif 787 *(p++)=0; /* Add the NULL method */ 788 789#ifndef OPENSSL_NO_TLSEXT 790 /* TLS extensions*/ 791 if (ssl_prepare_clienthello_tlsext(s) <= 0) 792 { 793 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT); 794 goto err; 795 } 796 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL) 797 { 798 SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR); 799 goto err; 800 } 801#endif 802 803 l=(p-d); 804 d=buf; 805 *(d++)=SSL3_MT_CLIENT_HELLO; 806 l2n3(l,d); 807 808 s->state=SSL3_ST_CW_CLNT_HELLO_B; 809 /* number of bytes to write */ 810 s->init_num=p-buf; 811 s->init_off=0; 812 } 813 814 /* SSL3_ST_CW_CLNT_HELLO_B */ 815 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 816err: 817 return(-1); 818 } 819 820int ssl3_get_server_hello(SSL *s) 821 { 822 STACK_OF(SSL_CIPHER) *sk; 823 const SSL_CIPHER *c; 824 unsigned char *p,*d; 825 int i,al,ok; 826 unsigned int j; 827 long n; 828#ifndef OPENSSL_NO_COMP 829 SSL_COMP *comp; 830#endif 831 832 n=s->method->ssl_get_message(s, 833 SSL3_ST_CR_SRVR_HELLO_A, 834 SSL3_ST_CR_SRVR_HELLO_B, 835 -1, 836 20000, /* ?? */ 837 &ok); 838 839 if (!ok) return((int)n); 840 841 if ( SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER) 842 { 843 if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST) 844 { 845 if ( s->d1->send_cookie == 0) 846 { 847 s->s3->tmp.reuse_message = 1; 848 return 1; 849 } 850 else /* already sent a cookie */ 851 { 852 al=SSL_AD_UNEXPECTED_MESSAGE; 853 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE); 854 goto f_err; 855 } 856 } 857 } 858 859 if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO) 860 { 861 al=SSL_AD_UNEXPECTED_MESSAGE; 862 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE); 863 goto f_err; 864 } 865 866 d=p=(unsigned char *)s->init_msg; 867 868 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff))) 869 { 870 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION); 871 s->version=(s->version&0xff00)|p[1]; 872 al=SSL_AD_PROTOCOL_VERSION; 873 goto f_err; 874 } 875 p+=2; 876 877 /* load the server hello data */ 878 /* load the server random */ 879 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE); 880 p+=SSL3_RANDOM_SIZE; 881 882 /* get the session-id */ 883 j= *(p++); 884 885 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE)) 886 { 887 al=SSL_AD_ILLEGAL_PARAMETER; 888 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG); 889 goto f_err; 890 } 891 892#ifndef OPENSSL_NO_TLSEXT 893 /* check if we want to resume the session based on external pre-shared secret */ 894 if (s->version >= TLS1_VERSION && s->tls_session_secret_cb) 895 { 896 SSL_CIPHER *pref_cipher=NULL; 897 s->session->master_key_length=sizeof(s->session->master_key); 898 if (s->tls_session_secret_cb(s, s->session->master_key, 899 &s->session->master_key_length, 900 NULL, &pref_cipher, 901 s->tls_session_secret_cb_arg)) 902 { 903 s->session->cipher = pref_cipher ? 904 pref_cipher : ssl_get_cipher_by_char(s, p+j); 905 } 906 } 907#endif /* OPENSSL_NO_TLSEXT */ 908 909 if (j != 0 && j == s->session->session_id_length 910 && memcmp(p,s->session->session_id,j) == 0) 911 { 912 if(s->sid_ctx_length != s->session->sid_ctx_length 913 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length)) 914 { 915 /* actually a client application bug */ 916 al=SSL_AD_ILLEGAL_PARAMETER; 917 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); 918 goto f_err; 919 } 920 s->s3->flags |= SSL3_FLAGS_CCS_OK; 921 s->hit=1; 922 } 923 else /* a miss or crap from the other end */ 924 { 925 /* If we were trying for session-id reuse, make a new 926 * SSL_SESSION so we don't stuff up other people */ 927 s->hit=0; 928 if (s->session->session_id_length > 0) 929 { 930 if (!ssl_get_new_session(s,0)) 931 { 932 al=SSL_AD_INTERNAL_ERROR; 933 goto f_err; 934 } 935 } 936 s->session->session_id_length=j; 937 memcpy(s->session->session_id,p,j); /* j could be 0 */ 938 } 939 p+=j; 940 c=ssl_get_cipher_by_char(s,p); 941 if (c == NULL) 942 { 943 /* unknown cipher */ 944 al=SSL_AD_ILLEGAL_PARAMETER; 945 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED); 946 goto f_err; 947 } 948 /* TLS v1.2 only ciphersuites require v1.2 or later */ 949 if ((c->algorithm_ssl & SSL_TLSV1_2) && 950 (TLS1_get_version(s) < TLS1_2_VERSION)) 951 { 952 al=SSL_AD_ILLEGAL_PARAMETER; 953 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED); 954 goto f_err; 955 } 956#ifndef OPENSSL_NO_SRP 957 if (((c->algorithm_mkey & SSL_kSRP) || (c->algorithm_auth & SSL_aSRP)) && 958 !(s->srp_ctx.srp_Mask & SSL_kSRP)) 959 { 960 al=SSL_AD_ILLEGAL_PARAMETER; 961 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED); 962 goto f_err; 963 } 964#endif /* OPENSSL_NO_SRP */ 965 p+=ssl_put_cipher_by_char(s,NULL,NULL); 966 967 sk=ssl_get_ciphers_by_id(s); 968 i=sk_SSL_CIPHER_find(sk,c); 969 if (i < 0) 970 { 971 /* we did not say we would use this cipher */ 972 al=SSL_AD_ILLEGAL_PARAMETER; 973 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED); 974 goto f_err; 975 } 976 977 /* Depending on the session caching (internal/external), the cipher 978 and/or cipher_id values may not be set. Make sure that 979 cipher_id is set and use it for comparison. */ 980 if (s->session->cipher) 981 s->session->cipher_id = s->session->cipher->id; 982 if (s->hit && (s->session->cipher_id != c->id)) 983 { 984/* Workaround is now obsolete */ 985#if 0 986 if (!(s->options & 987 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG)) 988#endif 989 { 990 al=SSL_AD_ILLEGAL_PARAMETER; 991 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); 992 goto f_err; 993 } 994 } 995 s->s3->tmp.new_cipher=c; 996 /* Don't digest cached records if TLS v1.2: we may need them for 997 * client authentication. 998 */ 999 if (TLS1_get_version(s) < TLS1_2_VERSION && !ssl3_digest_cached_records(s)) 1000 { 1001 al = SSL_AD_INTERNAL_ERROR; 1002 goto f_err; 1003 } 1004 /* lets get the compression algorithm */ 1005 /* COMPRESSION */ 1006#ifdef OPENSSL_NO_COMP 1007 if (*(p++) != 0) 1008 { 1009 al=SSL_AD_ILLEGAL_PARAMETER; 1010 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); 1011 goto f_err; 1012 } 1013 /* If compression is disabled we'd better not try to resume a session 1014 * using compression. 1015 */ 1016 if (s->session->compress_meth != 0) 1017 { 1018 al=SSL_AD_INTERNAL_ERROR; 1019 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_INCONSISTENT_COMPRESSION); 1020 goto f_err; 1021 } 1022#else 1023 j= *(p++); 1024 if (s->hit && j != s->session->compress_meth) 1025 { 1026 al=SSL_AD_ILLEGAL_PARAMETER; 1027 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED); 1028 goto f_err; 1029 } 1030 if (j == 0) 1031 comp=NULL; 1032 else if (s->options & SSL_OP_NO_COMPRESSION) 1033 { 1034 al=SSL_AD_ILLEGAL_PARAMETER; 1035 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_COMPRESSION_DISABLED); 1036 goto f_err; 1037 } 1038 else 1039 comp=ssl3_comp_find(s->ctx->comp_methods,j); 1040 1041 if ((j != 0) && (comp == NULL)) 1042 { 1043 al=SSL_AD_ILLEGAL_PARAMETER; 1044 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); 1045 goto f_err; 1046 } 1047 else 1048 { 1049 s->s3->tmp.new_compression=comp; 1050 } 1051#endif 1052 1053#ifndef OPENSSL_NO_TLSEXT 1054 /* TLS extensions*/ 1055 if (s->version >= SSL3_VERSION) 1056 { 1057 if (!ssl_parse_serverhello_tlsext(s,&p,d,n, &al)) 1058 { 1059 /* 'al' set by ssl_parse_serverhello_tlsext */ 1060 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT); 1061 goto f_err; 1062 } 1063 if (ssl_check_serverhello_tlsext(s) <= 0) 1064 { 1065 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SERVERHELLO_TLSEXT); 1066 goto err; 1067 } 1068 } 1069#endif 1070 1071 if (p != (d+n)) 1072 { 1073 /* wrong packet length */ 1074 al=SSL_AD_DECODE_ERROR; 1075 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH); 1076 goto f_err; 1077 } 1078 1079 return(1); 1080f_err: 1081 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1082err: 1083 return(-1); 1084 } 1085 1086int ssl3_get_server_certificate(SSL *s) 1087 { 1088 int al,i,ok,ret= -1; 1089 unsigned long n,nc,llen,l; 1090 X509 *x=NULL; 1091 const unsigned char *q,*p; 1092 unsigned char *d; 1093 STACK_OF(X509) *sk=NULL; 1094 SESS_CERT *sc; 1095 EVP_PKEY *pkey=NULL; 1096 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */ 1097 1098 n=s->method->ssl_get_message(s, 1099 SSL3_ST_CR_CERT_A, 1100 SSL3_ST_CR_CERT_B, 1101 -1, 1102 s->max_cert_list, 1103 &ok); 1104 1105 if (!ok) return((int)n); 1106 1107 if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) || 1108 ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) && 1109 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE))) 1110 { 1111 s->s3->tmp.reuse_message=1; 1112 return(1); 1113 } 1114 1115 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE) 1116 { 1117 al=SSL_AD_UNEXPECTED_MESSAGE; 1118 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE); 1119 goto f_err; 1120 } 1121 p=d=(unsigned char *)s->init_msg; 1122 1123 if ((sk=sk_X509_new_null()) == NULL) 1124 { 1125 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE); 1126 goto err; 1127 } 1128 1129 n2l3(p,llen); 1130 if (llen+3 != n) 1131 { 1132 al=SSL_AD_DECODE_ERROR; 1133 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH); 1134 goto f_err; 1135 } 1136 for (nc=0; nc<llen; ) 1137 { 1138 n2l3(p,l); 1139 if ((l+nc+3) > llen) 1140 { 1141 al=SSL_AD_DECODE_ERROR; 1142 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); 1143 goto f_err; 1144 } 1145 1146 q=p; 1147 x=d2i_X509(NULL,&q,l); 1148 if (x == NULL) 1149 { 1150 al=SSL_AD_BAD_CERTIFICATE; 1151 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB); 1152 goto f_err; 1153 } 1154 if (q != (p+l)) 1155 { 1156 al=SSL_AD_DECODE_ERROR; 1157 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); 1158 goto f_err; 1159 } 1160 if (!sk_X509_push(sk,x)) 1161 { 1162 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE); 1163 goto err; 1164 } 1165 x=NULL; 1166 nc+=l+3; 1167 p=q; 1168 } 1169 1170 i=ssl_verify_cert_chain(s,sk); 1171 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0) 1172#ifndef OPENSSL_NO_KRB5 1173 && !((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) && 1174 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5)) 1175#endif /* OPENSSL_NO_KRB5 */ 1176 ) 1177 { 1178 al=ssl_verify_alarm_type(s->verify_result); 1179 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED); 1180 goto f_err; 1181 } 1182 ERR_clear_error(); /* but we keep s->verify_result */ 1183 1184 sc=ssl_sess_cert_new(); 1185 if (sc == NULL) goto err; 1186 1187 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert); 1188 s->session->sess_cert=sc; 1189 1190 sc->cert_chain=sk; 1191 /* Inconsistency alert: cert_chain does include the peer's 1192 * certificate, which we don't include in s3_srvr.c */ 1193 x=sk_X509_value(sk,0); 1194 sk=NULL; 1195 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/ 1196 1197 pkey=X509_get_pubkey(x); 1198 1199 /* VRS: allow null cert if auth == KRB5 */ 1200 need_cert = ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) && 1201 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5)) 1202 ? 0 : 1; 1203 1204#ifdef KSSL_DEBUG 1205 printf("pkey,x = %p, %p\n", pkey,x); 1206 printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey)); 1207 printf("cipher, alg, nc = %s, %lx, %lx, %d\n", s->s3->tmp.new_cipher->name, 1208 s->s3->tmp.new_cipher->algorithm_mkey, s->s3->tmp.new_cipher->algorithm_auth, need_cert); 1209#endif /* KSSL_DEBUG */ 1210 1211 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey))) 1212 { 1213 x=NULL; 1214 al=SSL3_AL_FATAL; 1215 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 1216 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); 1217 goto f_err; 1218 } 1219 1220 i=ssl_cert_type(x,pkey); 1221 if (need_cert && i < 0) 1222 { 1223 x=NULL; 1224 al=SSL3_AL_FATAL; 1225 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 1226 SSL_R_UNKNOWN_CERTIFICATE_TYPE); 1227 goto f_err; 1228 } 1229 1230 if (need_cert) 1231 { 1232 sc->peer_cert_type=i; 1233 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509); 1234 /* Why would the following ever happen? 1235 * We just created sc a couple of lines ago. */ 1236 if (sc->peer_pkeys[i].x509 != NULL) 1237 X509_free(sc->peer_pkeys[i].x509); 1238 sc->peer_pkeys[i].x509=x; 1239 sc->peer_key= &(sc->peer_pkeys[i]); 1240 1241 if (s->session->peer != NULL) 1242 X509_free(s->session->peer); 1243 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509); 1244 s->session->peer=x; 1245 } 1246 else 1247 { 1248 sc->peer_cert_type=i; 1249 sc->peer_key= NULL; 1250 1251 if (s->session->peer != NULL) 1252 X509_free(s->session->peer); 1253 s->session->peer=NULL; 1254 } 1255 s->session->verify_result = s->verify_result; 1256 1257 x=NULL; 1258 ret=1; 1259 1260 if (0) 1261 { 1262f_err: 1263 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1264 } 1265err: 1266 EVP_PKEY_free(pkey); 1267 X509_free(x); 1268 sk_X509_pop_free(sk,X509_free); 1269 return(ret); 1270 } 1271 1272int ssl3_get_key_exchange(SSL *s) 1273 { 1274#ifndef OPENSSL_NO_RSA 1275 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2]; 1276#endif 1277 EVP_MD_CTX md_ctx; 1278 unsigned char *param,*p; 1279 int al,i,j,param_len,ok; 1280 long n,alg_k,alg_a; 1281 EVP_PKEY *pkey=NULL; 1282 const EVP_MD *md = NULL; 1283#ifndef OPENSSL_NO_RSA 1284 RSA *rsa=NULL; 1285#endif 1286#ifndef OPENSSL_NO_DH 1287 DH *dh=NULL; 1288#endif 1289#ifndef OPENSSL_NO_ECDH 1290 EC_KEY *ecdh = NULL; 1291 BN_CTX *bn_ctx = NULL; 1292 EC_POINT *srvr_ecpoint = NULL; 1293 int curve_nid = 0; 1294 int encoded_pt_len = 0; 1295#endif 1296 1297 /* use same message size as in ssl3_get_certificate_request() 1298 * as ServerKeyExchange message may be skipped */ 1299 n=s->method->ssl_get_message(s, 1300 SSL3_ST_CR_KEY_EXCH_A, 1301 SSL3_ST_CR_KEY_EXCH_B, 1302 -1, 1303 s->max_cert_list, 1304 &ok); 1305 if (!ok) return((int)n); 1306 1307 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE) 1308 { 1309#ifndef OPENSSL_NO_PSK 1310 /* In plain PSK ciphersuite, ServerKeyExchange can be 1311 omitted if no identity hint is sent. Set 1312 session->sess_cert anyway to avoid problems 1313 later.*/ 1314 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK) 1315 { 1316 s->session->sess_cert=ssl_sess_cert_new(); 1317 if (s->ctx->psk_identity_hint) 1318 OPENSSL_free(s->ctx->psk_identity_hint); 1319 s->ctx->psk_identity_hint = NULL; 1320 } 1321#endif 1322 s->s3->tmp.reuse_message=1; 1323 return(1); 1324 } 1325 1326 param=p=(unsigned char *)s->init_msg; 1327 if (s->session->sess_cert != NULL) 1328 { 1329#ifndef OPENSSL_NO_RSA 1330 if (s->session->sess_cert->peer_rsa_tmp != NULL) 1331 { 1332 RSA_free(s->session->sess_cert->peer_rsa_tmp); 1333 s->session->sess_cert->peer_rsa_tmp=NULL; 1334 } 1335#endif 1336#ifndef OPENSSL_NO_DH 1337 if (s->session->sess_cert->peer_dh_tmp) 1338 { 1339 DH_free(s->session->sess_cert->peer_dh_tmp); 1340 s->session->sess_cert->peer_dh_tmp=NULL; 1341 } 1342#endif 1343#ifndef OPENSSL_NO_ECDH 1344 if (s->session->sess_cert->peer_ecdh_tmp) 1345 { 1346 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp); 1347 s->session->sess_cert->peer_ecdh_tmp=NULL; 1348 } 1349#endif 1350 } 1351 else 1352 { 1353 s->session->sess_cert=ssl_sess_cert_new(); 1354 } 1355 1356 param_len=0; 1357 alg_k=s->s3->tmp.new_cipher->algorithm_mkey; 1358 alg_a=s->s3->tmp.new_cipher->algorithm_auth; 1359 EVP_MD_CTX_init(&md_ctx); 1360 1361#ifndef OPENSSL_NO_PSK 1362 if (alg_k & SSL_kPSK) 1363 { 1364 char tmp_id_hint[PSK_MAX_IDENTITY_LEN+1]; 1365 1366 al=SSL_AD_HANDSHAKE_FAILURE; 1367 n2s(p,i); 1368 param_len=i+2; 1369 /* Store PSK identity hint for later use, hint is used 1370 * in ssl3_send_client_key_exchange. Assume that the 1371 * maximum length of a PSK identity hint can be as 1372 * long as the maximum length of a PSK identity. */ 1373 if (i > PSK_MAX_IDENTITY_LEN) 1374 { 1375 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1376 SSL_R_DATA_LENGTH_TOO_LONG); 1377 goto f_err; 1378 } 1379 if (param_len > n) 1380 { 1381 al=SSL_AD_DECODE_ERROR; 1382 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1383 SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH); 1384 goto f_err; 1385 } 1386 /* If received PSK identity hint contains NULL 1387 * characters, the hint is truncated from the first 1388 * NULL. p may not be ending with NULL, so create a 1389 * NULL-terminated string. */ 1390 memcpy(tmp_id_hint, p, i); 1391 memset(tmp_id_hint+i, 0, PSK_MAX_IDENTITY_LEN+1-i); 1392 if (s->ctx->psk_identity_hint != NULL) 1393 OPENSSL_free(s->ctx->psk_identity_hint); 1394 s->ctx->psk_identity_hint = BUF_strdup(tmp_id_hint); 1395 if (s->ctx->psk_identity_hint == NULL) 1396 { 1397 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); 1398 goto f_err; 1399 } 1400 1401 p+=i; 1402 n-=param_len; 1403 } 1404 else 1405#endif /* !OPENSSL_NO_PSK */ 1406#ifndef OPENSSL_NO_SRP 1407 if (alg_k & SSL_kSRP) 1408 { 1409 n2s(p,i); 1410 param_len=i+2; 1411 if (param_len > n) 1412 { 1413 al=SSL_AD_DECODE_ERROR; 1414 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_N_LENGTH); 1415 goto f_err; 1416 } 1417 if (!(s->srp_ctx.N=BN_bin2bn(p,i,NULL))) 1418 { 1419 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1420 goto err; 1421 } 1422 p+=i; 1423 1424 n2s(p,i); 1425 param_len+=i+2; 1426 if (param_len > n) 1427 { 1428 al=SSL_AD_DECODE_ERROR; 1429 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_G_LENGTH); 1430 goto f_err; 1431 } 1432 if (!(s->srp_ctx.g=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 i = (unsigned int)(p[0]); 1440 p++; 1441 param_len+=i+1; 1442 if (param_len > n) 1443 { 1444 al=SSL_AD_DECODE_ERROR; 1445 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_S_LENGTH); 1446 goto f_err; 1447 } 1448 if (!(s->srp_ctx.s=BN_bin2bn(p,i,NULL))) 1449 { 1450 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1451 goto err; 1452 } 1453 p+=i; 1454 1455 n2s(p,i); 1456 param_len+=i+2; 1457 if (param_len > n) 1458 { 1459 al=SSL_AD_DECODE_ERROR; 1460 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_B_LENGTH); 1461 goto f_err; 1462 } 1463 if (!(s->srp_ctx.B=BN_bin2bn(p,i,NULL))) 1464 { 1465 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1466 goto err; 1467 } 1468 p+=i; 1469 n-=param_len; 1470 1471 if (!srp_verify_server_param(s, &al)) 1472 { 1473 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_PARAMETERS); 1474 goto f_err; 1475 } 1476 1477/* We must check if there is a certificate */ 1478#ifndef OPENSSL_NO_RSA 1479 if (alg_a & SSL_aRSA) 1480 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1481#else 1482 if (0) 1483 ; 1484#endif 1485#ifndef OPENSSL_NO_DSA 1486 else if (alg_a & SSL_aDSS) 1487 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509); 1488#endif 1489 } 1490 else 1491#endif /* !OPENSSL_NO_SRP */ 1492#ifndef OPENSSL_NO_RSA 1493 if (alg_k & SSL_kRSA) 1494 { 1495 if ((rsa=RSA_new()) == NULL) 1496 { 1497 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1498 goto err; 1499 } 1500 n2s(p,i); 1501 param_len=i+2; 1502 if (param_len > n) 1503 { 1504 al=SSL_AD_DECODE_ERROR; 1505 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH); 1506 goto f_err; 1507 } 1508 if (!(rsa->n=BN_bin2bn(p,i,rsa->n))) 1509 { 1510 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1511 goto err; 1512 } 1513 p+=i; 1514 1515 n2s(p,i); 1516 param_len+=i+2; 1517 if (param_len > n) 1518 { 1519 al=SSL_AD_DECODE_ERROR; 1520 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH); 1521 goto f_err; 1522 } 1523 if (!(rsa->e=BN_bin2bn(p,i,rsa->e))) 1524 { 1525 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1526 goto err; 1527 } 1528 p+=i; 1529 n-=param_len; 1530 1531 /* this should be because we are using an export cipher */ 1532 if (alg_a & SSL_aRSA) 1533 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1534 else 1535 { 1536 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1537 goto err; 1538 } 1539 s->session->sess_cert->peer_rsa_tmp=rsa; 1540 rsa=NULL; 1541 } 1542#else /* OPENSSL_NO_RSA */ 1543 if (0) 1544 ; 1545#endif 1546#ifndef OPENSSL_NO_DH 1547 else if (alg_k & SSL_kEDH) 1548 { 1549 if ((dh=DH_new()) == NULL) 1550 { 1551 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB); 1552 goto err; 1553 } 1554 n2s(p,i); 1555 param_len=i+2; 1556 if (param_len > n) 1557 { 1558 al=SSL_AD_DECODE_ERROR; 1559 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH); 1560 goto f_err; 1561 } 1562 if (!(dh->p=BN_bin2bn(p,i,NULL))) 1563 { 1564 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1565 goto err; 1566 } 1567 p+=i; 1568 1569 n2s(p,i); 1570 param_len+=i+2; 1571 if (param_len > n) 1572 { 1573 al=SSL_AD_DECODE_ERROR; 1574 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH); 1575 goto f_err; 1576 } 1577 if (!(dh->g=BN_bin2bn(p,i,NULL))) 1578 { 1579 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1580 goto err; 1581 } 1582 p+=i; 1583 1584 n2s(p,i); 1585 param_len+=i+2; 1586 if (param_len > n) 1587 { 1588 al=SSL_AD_DECODE_ERROR; 1589 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH); 1590 goto f_err; 1591 } 1592 if (!(dh->pub_key=BN_bin2bn(p,i,NULL))) 1593 { 1594 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1595 goto err; 1596 } 1597 p+=i; 1598 n-=param_len; 1599 1600#ifndef OPENSSL_NO_RSA 1601 if (alg_a & SSL_aRSA) 1602 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1603#else 1604 if (0) 1605 ; 1606#endif 1607#ifndef OPENSSL_NO_DSA 1608 else if (alg_a & SSL_aDSS) 1609 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509); 1610#endif 1611 /* else anonymous DH, so no certificate or pkey. */ 1612 1613 s->session->sess_cert->peer_dh_tmp=dh; 1614 dh=NULL; 1615 } 1616 else if ((alg_k & SSL_kDHr) || (alg_k & SSL_kDHd)) 1617 { 1618 al=SSL_AD_ILLEGAL_PARAMETER; 1619 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER); 1620 goto f_err; 1621 } 1622#endif /* !OPENSSL_NO_DH */ 1623 1624#ifndef OPENSSL_NO_ECDH 1625 else if (alg_k & SSL_kEECDH) 1626 { 1627 EC_GROUP *ngroup; 1628 const EC_GROUP *group; 1629 1630 if ((ecdh=EC_KEY_new()) == NULL) 1631 { 1632 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1633 goto err; 1634 } 1635 1636 /* Extract elliptic curve parameters and the 1637 * server's ephemeral ECDH public key. 1638 * Keep accumulating lengths of various components in 1639 * param_len and make sure it never exceeds n. 1640 */ 1641 1642 /* XXX: For now we only support named (not generic) curves 1643 * and the ECParameters in this case is just three bytes. 1644 */ 1645 param_len=3; 1646 if ((param_len > n) || 1647 (*p != NAMED_CURVE_TYPE) || 1648 ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0)) 1649 { 1650 al=SSL_AD_INTERNAL_ERROR; 1651 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); 1652 goto f_err; 1653 } 1654 1655 ngroup = EC_GROUP_new_by_curve_name(curve_nid); 1656 if (ngroup == NULL) 1657 { 1658 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB); 1659 goto err; 1660 } 1661 if (EC_KEY_set_group(ecdh, ngroup) == 0) 1662 { 1663 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB); 1664 goto err; 1665 } 1666 EC_GROUP_free(ngroup); 1667 1668 group = EC_KEY_get0_group(ecdh); 1669 1670 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && 1671 (EC_GROUP_get_degree(group) > 163)) 1672 { 1673 al=SSL_AD_EXPORT_RESTRICTION; 1674 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER); 1675 goto f_err; 1676 } 1677 1678 p+=3; 1679 1680 /* Next, get the encoded ECPoint */ 1681 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) || 1682 ((bn_ctx = BN_CTX_new()) == NULL)) 1683 { 1684 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1685 goto err; 1686 } 1687 1688 encoded_pt_len = *p; /* length of encoded point */ 1689 p+=1; 1690 param_len += (1 + encoded_pt_len); 1691 if ((param_len > n) || 1692 (EC_POINT_oct2point(group, srvr_ecpoint, 1693 p, encoded_pt_len, bn_ctx) == 0)) 1694 { 1695 al=SSL_AD_DECODE_ERROR; 1696 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT); 1697 goto f_err; 1698 } 1699 1700 n-=param_len; 1701 p+=encoded_pt_len; 1702 1703 /* The ECC/TLS specification does not mention 1704 * the use of DSA to sign ECParameters in the server 1705 * key exchange message. We do support RSA and ECDSA. 1706 */ 1707 if (0) ; 1708#ifndef OPENSSL_NO_RSA 1709 else if (alg_a & SSL_aRSA) 1710 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1711#endif 1712#ifndef OPENSSL_NO_ECDSA 1713 else if (alg_a & SSL_aECDSA) 1714 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509); 1715#endif 1716 /* else anonymous ECDH, so no certificate or pkey. */ 1717 EC_KEY_set_public_key(ecdh, srvr_ecpoint); 1718 s->session->sess_cert->peer_ecdh_tmp=ecdh; 1719 ecdh=NULL; 1720 BN_CTX_free(bn_ctx); 1721 bn_ctx = NULL; 1722 EC_POINT_free(srvr_ecpoint); 1723 srvr_ecpoint = NULL; 1724 } 1725 else if (alg_k) 1726 { 1727 al=SSL_AD_UNEXPECTED_MESSAGE; 1728 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE); 1729 goto f_err; 1730 } 1731#endif /* !OPENSSL_NO_ECDH */ 1732 1733 1734 /* p points to the next byte, there are 'n' bytes left */ 1735 1736 /* if it was signed, check the signature */ 1737 if (pkey != NULL) 1738 { 1739 if (TLS1_get_version(s) >= TLS1_2_VERSION) 1740 { 1741 int sigalg = tls12_get_sigid(pkey); 1742 /* Should never happen */ 1743 if (sigalg == -1) 1744 { 1745 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1746 goto err; 1747 } 1748 /* Check key type is consistent with signature */ 1749 if (sigalg != (int)p[1]) 1750 { 1751 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_TYPE); 1752 al=SSL_AD_DECODE_ERROR; 1753 goto f_err; 1754 } 1755 md = tls12_get_hash(p[0]); 1756 if (md == NULL) 1757 { 1758 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNKNOWN_DIGEST); 1759 al=SSL_AD_DECODE_ERROR; 1760 goto f_err; 1761 } 1762#ifdef SSL_DEBUG 1763fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md)); 1764#endif 1765 p += 2; 1766 n -= 2; 1767 } 1768 else 1769 md = EVP_sha1(); 1770 1771 n2s(p,i); 1772 n-=2; 1773 j=EVP_PKEY_size(pkey); 1774 1775 if ((i != n) || (n > j) || (n <= 0)) 1776 { 1777 /* wrong packet length */ 1778 al=SSL_AD_DECODE_ERROR; 1779 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH); 1780 goto f_err; 1781 } 1782 1783#ifndef OPENSSL_NO_RSA 1784 if (pkey->type == EVP_PKEY_RSA && TLS1_get_version(s) < TLS1_2_VERSION) 1785 { 1786 int num; 1787 1788 j=0; 1789 q=md_buf; 1790 for (num=2; num > 0; num--) 1791 { 1792 EVP_MD_CTX_set_flags(&md_ctx, 1793 EVP_MD_CTX_FLAG_NON_FIPS_ALLOW); 1794 EVP_DigestInit_ex(&md_ctx,(num == 2) 1795 ?s->ctx->md5:s->ctx->sha1, NULL); 1796 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); 1797 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); 1798 EVP_DigestUpdate(&md_ctx,param,param_len); 1799 EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i); 1800 q+=i; 1801 j+=i; 1802 } 1803 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n, 1804 pkey->pkey.rsa); 1805 if (i < 0) 1806 { 1807 al=SSL_AD_DECRYPT_ERROR; 1808 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT); 1809 goto f_err; 1810 } 1811 if (i == 0) 1812 { 1813 /* bad signature */ 1814 al=SSL_AD_DECRYPT_ERROR; 1815 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE); 1816 goto f_err; 1817 } 1818 } 1819 else 1820#endif 1821 { 1822 EVP_VerifyInit_ex(&md_ctx, md, NULL); 1823 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); 1824 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); 1825 EVP_VerifyUpdate(&md_ctx,param,param_len); 1826 if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0) 1827 { 1828 /* bad signature */ 1829 al=SSL_AD_DECRYPT_ERROR; 1830 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE); 1831 goto f_err; 1832 } 1833 } 1834 } 1835 else 1836 { 1837 if (!(alg_a & SSL_aNULL) && !(alg_k & SSL_kPSK)) 1838 /* aNULL or kPSK do not need public keys */ 1839 { 1840 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1841 goto err; 1842 } 1843 /* still data left over */ 1844 if (n != 0) 1845 { 1846 al=SSL_AD_DECODE_ERROR; 1847 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE); 1848 goto f_err; 1849 } 1850 } 1851 EVP_PKEY_free(pkey); 1852 EVP_MD_CTX_cleanup(&md_ctx); 1853 return(1); 1854f_err: 1855 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1856err: 1857 EVP_PKEY_free(pkey); 1858#ifndef OPENSSL_NO_RSA 1859 if (rsa != NULL) 1860 RSA_free(rsa); 1861#endif 1862#ifndef OPENSSL_NO_DH 1863 if (dh != NULL) 1864 DH_free(dh); 1865#endif 1866#ifndef OPENSSL_NO_ECDH 1867 BN_CTX_free(bn_ctx); 1868 EC_POINT_free(srvr_ecpoint); 1869 if (ecdh != NULL) 1870 EC_KEY_free(ecdh); 1871#endif 1872 EVP_MD_CTX_cleanup(&md_ctx); 1873 return(-1); 1874 } 1875 1876int ssl3_get_certificate_request(SSL *s) 1877 { 1878 int ok,ret=0; 1879 unsigned long n,nc,l; 1880 unsigned int llen, ctype_num,i; 1881 X509_NAME *xn=NULL; 1882 const unsigned char *p,*q; 1883 unsigned char *d; 1884 STACK_OF(X509_NAME) *ca_sk=NULL; 1885 1886 n=s->method->ssl_get_message(s, 1887 SSL3_ST_CR_CERT_REQ_A, 1888 SSL3_ST_CR_CERT_REQ_B, 1889 -1, 1890 s->max_cert_list, 1891 &ok); 1892 1893 if (!ok) return((int)n); 1894 1895 s->s3->tmp.cert_req=0; 1896 1897 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE) 1898 { 1899 s->s3->tmp.reuse_message=1; 1900 /* If we get here we don't need any cached handshake records 1901 * as we wont be doing client auth. 1902 */ 1903 if (s->s3->handshake_buffer) 1904 { 1905 if (!ssl3_digest_cached_records(s)) 1906 goto err; 1907 } 1908 return(1); 1909 } 1910 1911 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST) 1912 { 1913 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 1914 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE); 1915 goto err; 1916 } 1917 1918 /* TLS does not like anon-DH with client cert */ 1919 if (s->version > SSL3_VERSION) 1920 { 1921 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) 1922 { 1923 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 1924 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER); 1925 goto err; 1926 } 1927 } 1928 1929 p=d=(unsigned char *)s->init_msg; 1930 1931 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL) 1932 { 1933 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE); 1934 goto err; 1935 } 1936 1937 /* get the certificate types */ 1938 ctype_num= *(p++); 1939 if (ctype_num > SSL3_CT_NUMBER) 1940 ctype_num=SSL3_CT_NUMBER; 1941 for (i=0; i<ctype_num; i++) 1942 s->s3->tmp.ctype[i]= p[i]; 1943 p+=ctype_num; 1944 if (TLS1_get_version(s) >= TLS1_2_VERSION) 1945 { 1946 n2s(p, llen); 1947 /* Check we have enough room for signature algorithms and 1948 * following length value. 1949 */ 1950 if ((unsigned long)(p - d + llen + 2) > n) 1951 { 1952 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1953 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_DATA_LENGTH_TOO_LONG); 1954 goto err; 1955 } 1956 if ((llen & 1) || !tls1_process_sigalgs(s, p, llen)) 1957 { 1958 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1959 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_SIGNATURE_ALGORITHMS_ERROR); 1960 goto err; 1961 } 1962 p += llen; 1963 } 1964 1965 /* get the CA RDNs */ 1966 n2s(p,llen); 1967#if 0 1968{ 1969FILE *out; 1970out=fopen("/tmp/vsign.der","w"); 1971fwrite(p,1,llen,out); 1972fclose(out); 1973} 1974#endif 1975 1976 if ((unsigned long)(p - d + llen) != n) 1977 { 1978 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1979 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH); 1980 goto err; 1981 } 1982 1983 for (nc=0; nc<llen; ) 1984 { 1985 n2s(p,l); 1986 if ((l+nc+2) > llen) 1987 { 1988 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG)) 1989 goto cont; /* netscape bugs */ 1990 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1991 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG); 1992 goto err; 1993 } 1994 1995 q=p; 1996 1997 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL) 1998 { 1999 /* If netscape tolerance is on, ignore errors */ 2000 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG) 2001 goto cont; 2002 else 2003 { 2004 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 2005 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB); 2006 goto err; 2007 } 2008 } 2009 2010 if (q != (p+l)) 2011 { 2012 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 2013 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH); 2014 goto err; 2015 } 2016 if (!sk_X509_NAME_push(ca_sk,xn)) 2017 { 2018 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE); 2019 goto err; 2020 } 2021 2022 p+=l; 2023 nc+=l+2; 2024 } 2025 2026 if (0) 2027 { 2028cont: 2029 ERR_clear_error(); 2030 } 2031 2032 /* we should setup a certificate to return.... */ 2033 s->s3->tmp.cert_req=1; 2034 s->s3->tmp.ctype_num=ctype_num; 2035 if (s->s3->tmp.ca_names != NULL) 2036 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free); 2037 s->s3->tmp.ca_names=ca_sk; 2038 ca_sk=NULL; 2039 2040 ret=1; 2041err: 2042 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free); 2043 return(ret); 2044 } 2045 2046static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b) 2047 { 2048 return(X509_NAME_cmp(*a,*b)); 2049 } 2050#ifndef OPENSSL_NO_TLSEXT 2051int ssl3_get_new_session_ticket(SSL *s) 2052 { 2053 int ok,al,ret=0, ticklen; 2054 long n; 2055 const unsigned char *p; 2056 unsigned char *d; 2057 2058 n=s->method->ssl_get_message(s, 2059 SSL3_ST_CR_SESSION_TICKET_A, 2060 SSL3_ST_CR_SESSION_TICKET_B, 2061 -1, 2062 16384, 2063 &ok); 2064 2065 if (!ok) 2066 return((int)n); 2067 2068 if (s->s3->tmp.message_type == SSL3_MT_FINISHED) 2069 { 2070 s->s3->tmp.reuse_message=1; 2071 return(1); 2072 } 2073 if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET) 2074 { 2075 al=SSL_AD_UNEXPECTED_MESSAGE; 2076 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_BAD_MESSAGE_TYPE); 2077 goto f_err; 2078 } 2079 if (n < 6) 2080 { 2081 /* need at least ticket_lifetime_hint + ticket length */ 2082 al = SSL_AD_DECODE_ERROR; 2083 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH); 2084 goto f_err; 2085 } 2086 2087 p=d=(unsigned char *)s->init_msg; 2088 n2l(p, s->session->tlsext_tick_lifetime_hint); 2089 n2s(p, ticklen); 2090 /* ticket_lifetime_hint + ticket_length + ticket */ 2091 if (ticklen + 6 != n) 2092 { 2093 al = SSL_AD_DECODE_ERROR; 2094 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH); 2095 goto f_err; 2096 } 2097 if (s->session->tlsext_tick) 2098 { 2099 OPENSSL_free(s->session->tlsext_tick); 2100 s->session->tlsext_ticklen = 0; 2101 } 2102 s->session->tlsext_tick = OPENSSL_malloc(ticklen); 2103 if (!s->session->tlsext_tick) 2104 { 2105 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE); 2106 goto err; 2107 } 2108 memcpy(s->session->tlsext_tick, p, ticklen); 2109 s->session->tlsext_ticklen = ticklen; 2110 /* There are two ways to detect a resumed ticket sesion. 2111 * One is to set an appropriate session ID and then the server 2112 * must return a match in ServerHello. This allows the normal 2113 * client session ID matching to work and we know much 2114 * earlier that the ticket has been accepted. 2115 * 2116 * The other way is to set zero length session ID when the 2117 * ticket is presented and rely on the handshake to determine 2118 * session resumption. 2119 * 2120 * We choose the former approach because this fits in with 2121 * assumptions elsewhere in OpenSSL. The session ID is set 2122 * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the 2123 * ticket. 2124 */ 2125 EVP_Digest(p, ticklen, 2126 s->session->session_id, &s->session->session_id_length, 2127#ifndef OPENSSL_NO_SHA256 2128 EVP_sha256(), NULL); 2129#else 2130 EVP_sha1(), NULL); 2131#endif 2132 ret=1; 2133 return(ret); 2134f_err: 2135 ssl3_send_alert(s,SSL3_AL_FATAL,al); 2136err: 2137 return(-1); 2138 } 2139 2140int ssl3_get_cert_status(SSL *s) 2141 { 2142 int ok, al; 2143 unsigned long resplen,n; 2144 const unsigned char *p; 2145 2146 n=s->method->ssl_get_message(s, 2147 SSL3_ST_CR_CERT_STATUS_A, 2148 SSL3_ST_CR_CERT_STATUS_B, 2149 SSL3_MT_CERTIFICATE_STATUS, 2150 16384, 2151 &ok); 2152 2153 if (!ok) return((int)n); 2154 if (n < 4) 2155 { 2156 /* need at least status type + length */ 2157 al = SSL_AD_DECODE_ERROR; 2158 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH); 2159 goto f_err; 2160 } 2161 p = (unsigned char *)s->init_msg; 2162 if (*p++ != TLSEXT_STATUSTYPE_ocsp) 2163 { 2164 al = SSL_AD_DECODE_ERROR; 2165 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_UNSUPPORTED_STATUS_TYPE); 2166 goto f_err; 2167 } 2168 n2l3(p, resplen); 2169 if (resplen + 4 != n) 2170 { 2171 al = SSL_AD_DECODE_ERROR; 2172 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH); 2173 goto f_err; 2174 } 2175 if (s->tlsext_ocsp_resp) 2176 OPENSSL_free(s->tlsext_ocsp_resp); 2177 s->tlsext_ocsp_resp = BUF_memdup(p, resplen); 2178 if (!s->tlsext_ocsp_resp) 2179 { 2180 al = SSL_AD_INTERNAL_ERROR; 2181 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE); 2182 goto f_err; 2183 } 2184 s->tlsext_ocsp_resplen = resplen; 2185 if (s->ctx->tlsext_status_cb) 2186 { 2187 int ret; 2188 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg); 2189 if (ret == 0) 2190 { 2191 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE; 2192 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_INVALID_STATUS_RESPONSE); 2193 goto f_err; 2194 } 2195 if (ret < 0) 2196 { 2197 al = SSL_AD_INTERNAL_ERROR; 2198 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE); 2199 goto f_err; 2200 } 2201 } 2202 return 1; 2203f_err: 2204 ssl3_send_alert(s,SSL3_AL_FATAL,al); 2205 return(-1); 2206 } 2207#endif 2208 2209int ssl3_get_server_done(SSL *s) 2210 { 2211 int ok,ret=0; 2212 long n; 2213 2214 n=s->method->ssl_get_message(s, 2215 SSL3_ST_CR_SRVR_DONE_A, 2216 SSL3_ST_CR_SRVR_DONE_B, 2217 SSL3_MT_SERVER_DONE, 2218 30, /* should be very small, like 0 :-) */ 2219 &ok); 2220 2221 if (!ok) return((int)n); 2222 if (n > 0) 2223 { 2224 /* should contain no data */ 2225 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 2226 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH); 2227 return -1; 2228 } 2229 ret=1; 2230 return(ret); 2231 } 2232 2233 2234int ssl3_send_client_key_exchange(SSL *s) 2235 { 2236 unsigned char *p,*d; 2237 int n; 2238 unsigned long alg_k; 2239#ifndef OPENSSL_NO_RSA 2240 unsigned char *q; 2241 EVP_PKEY *pkey=NULL; 2242#endif 2243#ifndef OPENSSL_NO_KRB5 2244 KSSL_ERR kssl_err; 2245#endif /* OPENSSL_NO_KRB5 */ 2246#ifndef OPENSSL_NO_ECDH 2247 EC_KEY *clnt_ecdh = NULL; 2248 const EC_POINT *srvr_ecpoint = NULL; 2249 EVP_PKEY *srvr_pub_pkey = NULL; 2250 unsigned char *encodedPoint = NULL; 2251 int encoded_pt_len = 0; 2252 BN_CTX * bn_ctx = NULL; 2253#endif 2254 2255 if (s->state == SSL3_ST_CW_KEY_EXCH_A) 2256 { 2257 d=(unsigned char *)s->init_buf->data; 2258 p= &(d[4]); 2259 2260 alg_k=s->s3->tmp.new_cipher->algorithm_mkey; 2261 2262 /* Fool emacs indentation */ 2263 if (0) {} 2264#ifndef OPENSSL_NO_RSA 2265 else if (alg_k & SSL_kRSA) 2266 { 2267 RSA *rsa; 2268 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; 2269 2270 if (s->session->sess_cert == NULL) 2271 { 2272 /* We should always have a server certificate with SSL_kRSA. */ 2273 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 2274 goto err; 2275 } 2276 2277 if (s->session->sess_cert->peer_rsa_tmp != NULL) 2278 rsa=s->session->sess_cert->peer_rsa_tmp; 2279 else 2280 { 2281 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 2282 if ((pkey == NULL) || 2283 (pkey->type != EVP_PKEY_RSA) || 2284 (pkey->pkey.rsa == NULL)) 2285 { 2286 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 2287 goto err; 2288 } 2289 rsa=pkey->pkey.rsa; 2290 EVP_PKEY_free(pkey); 2291 } 2292 2293 tmp_buf[0]=s->client_version>>8; 2294 tmp_buf[1]=s->client_version&0xff; 2295 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0) 2296 goto err; 2297 2298 s->session->master_key_length=sizeof tmp_buf; 2299 2300 q=p; 2301 /* Fix buf for TLS and beyond */ 2302 if (s->version > SSL3_VERSION) 2303 p+=2; 2304 n=RSA_public_encrypt(sizeof tmp_buf, 2305 tmp_buf,p,rsa,RSA_PKCS1_PADDING); 2306#ifdef PKCS1_CHECK 2307 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++; 2308 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70; 2309#endif 2310 if (n <= 0) 2311 { 2312 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT); 2313 goto err; 2314 } 2315 2316 /* Fix buf for TLS and beyond */ 2317 if (s->version > SSL3_VERSION) 2318 { 2319 s2n(n,q); 2320 n+=2; 2321 } 2322 2323 s->session->master_key_length= 2324 s->method->ssl3_enc->generate_master_secret(s, 2325 s->session->master_key, 2326 tmp_buf,sizeof tmp_buf); 2327 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf); 2328 } 2329#endif 2330#ifndef OPENSSL_NO_KRB5 2331 else if (alg_k & SSL_kKRB5) 2332 { 2333 krb5_error_code krb5rc; 2334 KSSL_CTX *kssl_ctx = s->kssl_ctx; 2335 /* krb5_data krb5_ap_req; */ 2336 krb5_data *enc_ticket; 2337 krb5_data authenticator, *authp = NULL; 2338 EVP_CIPHER_CTX ciph_ctx; 2339 const EVP_CIPHER *enc = NULL; 2340 unsigned char iv[EVP_MAX_IV_LENGTH]; 2341 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; 2342 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH 2343 + EVP_MAX_IV_LENGTH]; 2344 int padl, outl = sizeof(epms); 2345 2346 EVP_CIPHER_CTX_init(&ciph_ctx); 2347 2348#ifdef KSSL_DEBUG 2349 printf("ssl3_send_client_key_exchange(%lx & %lx)\n", 2350 alg_k, SSL_kKRB5); 2351#endif /* KSSL_DEBUG */ 2352 2353 authp = NULL; 2354#ifdef KRB5SENDAUTH 2355 if (KRB5SENDAUTH) authp = &authenticator; 2356#endif /* KRB5SENDAUTH */ 2357 2358 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp, 2359 &kssl_err); 2360 enc = kssl_map_enc(kssl_ctx->enctype); 2361 if (enc == NULL) 2362 goto err; 2363#ifdef KSSL_DEBUG 2364 { 2365 printf("kssl_cget_tkt rtn %d\n", krb5rc); 2366 if (krb5rc && kssl_err.text) 2367 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text); 2368 } 2369#endif /* KSSL_DEBUG */ 2370 2371 if (krb5rc) 2372 { 2373 ssl3_send_alert(s,SSL3_AL_FATAL, 2374 SSL_AD_HANDSHAKE_FAILURE); 2375 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2376 kssl_err.reason); 2377 goto err; 2378 } 2379 2380 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ 2381 ** in place of RFC 2712 KerberosWrapper, as in: 2382 ** 2383 ** Send ticket (copy to *p, set n = length) 2384 ** n = krb5_ap_req.length; 2385 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length); 2386 ** if (krb5_ap_req.data) 2387 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req); 2388 ** 2389 ** Now using real RFC 2712 KerberosWrapper 2390 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>) 2391 ** Note: 2712 "opaque" types are here replaced 2392 ** with a 2-byte length followed by the value. 2393 ** Example: 2394 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms 2395 ** Where "xx xx" = length bytes. Shown here with 2396 ** optional authenticator omitted. 2397 */ 2398 2399 /* KerberosWrapper.Ticket */ 2400 s2n(enc_ticket->length,p); 2401 memcpy(p, enc_ticket->data, enc_ticket->length); 2402 p+= enc_ticket->length; 2403 n = enc_ticket->length + 2; 2404 2405 /* KerberosWrapper.Authenticator */ 2406 if (authp && authp->length) 2407 { 2408 s2n(authp->length,p); 2409 memcpy(p, authp->data, authp->length); 2410 p+= authp->length; 2411 n+= authp->length + 2; 2412 2413 free(authp->data); 2414 authp->data = NULL; 2415 authp->length = 0; 2416 } 2417 else 2418 { 2419 s2n(0,p);/* null authenticator length */ 2420 n+=2; 2421 } 2422 2423 tmp_buf[0]=s->client_version>>8; 2424 tmp_buf[1]=s->client_version&0xff; 2425 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0) 2426 goto err; 2427 2428 /* 20010420 VRS. Tried it this way; failed. 2429 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL); 2430 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx, 2431 ** kssl_ctx->length); 2432 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv); 2433 */ 2434 2435 memset(iv, 0, sizeof iv); /* per RFC 1510 */ 2436 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL, 2437 kssl_ctx->key,iv); 2438 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf, 2439 sizeof tmp_buf); 2440 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl); 2441 outl += padl; 2442 if (outl > (int)sizeof epms) 2443 { 2444 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); 2445 goto err; 2446 } 2447 EVP_CIPHER_CTX_cleanup(&ciph_ctx); 2448 2449 /* KerberosWrapper.EncryptedPreMasterSecret */ 2450 s2n(outl,p); 2451 memcpy(p, epms, outl); 2452 p+=outl; 2453 n+=outl + 2; 2454 2455 s->session->master_key_length= 2456 s->method->ssl3_enc->generate_master_secret(s, 2457 s->session->master_key, 2458 tmp_buf, sizeof tmp_buf); 2459 2460 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf); 2461 OPENSSL_cleanse(epms, outl); 2462 } 2463#endif 2464#ifndef OPENSSL_NO_DH 2465 else if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) 2466 { 2467 DH *dh_srvr,*dh_clnt; 2468 2469 if (s->session->sess_cert == NULL) 2470 { 2471 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 2472 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE); 2473 goto err; 2474 } 2475 2476 if (s->session->sess_cert->peer_dh_tmp != NULL) 2477 dh_srvr=s->session->sess_cert->peer_dh_tmp; 2478 else 2479 { 2480 /* we get them from the cert */ 2481 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); 2482 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS); 2483 goto err; 2484 } 2485 2486 /* generate a new random key */ 2487 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL) 2488 { 2489 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 2490 goto err; 2491 } 2492 if (!DH_generate_key(dh_clnt)) 2493 { 2494 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 2495 DH_free(dh_clnt); 2496 goto err; 2497 } 2498 2499 /* use the 'p' output buffer for the DH key, but 2500 * make sure to clear it out afterwards */ 2501 2502 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt); 2503 2504 if (n <= 0) 2505 { 2506 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 2507 DH_free(dh_clnt); 2508 goto err; 2509 } 2510 2511 /* generate master key from the result */ 2512 s->session->master_key_length= 2513 s->method->ssl3_enc->generate_master_secret(s, 2514 s->session->master_key,p,n); 2515 /* clean up */ 2516 memset(p,0,n); 2517 2518 /* send off the data */ 2519 n=BN_num_bytes(dh_clnt->pub_key); 2520 s2n(n,p); 2521 BN_bn2bin(dh_clnt->pub_key,p); 2522 n+=2; 2523 2524 DH_free(dh_clnt); 2525 2526 /* perhaps clean things up a bit EAY EAY EAY EAY*/ 2527 } 2528#endif 2529 2530#ifndef OPENSSL_NO_ECDH 2531 else if (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)) 2532 { 2533 const EC_GROUP *srvr_group = NULL; 2534 EC_KEY *tkey; 2535 int ecdh_clnt_cert = 0; 2536 int field_size = 0; 2537 2538 if (s->session->sess_cert == NULL) 2539 { 2540 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 2541 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE); 2542 goto err; 2543 } 2544 2545 /* Did we send out the client's 2546 * ECDH share for use in premaster 2547 * computation as part of client certificate? 2548 * If so, set ecdh_clnt_cert to 1. 2549 */ 2550 if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL)) 2551 { 2552 /* XXX: For now, we do not support client 2553 * authentication using ECDH certificates. 2554 * To add such support, one needs to add 2555 * code that checks for appropriate 2556 * conditions and sets ecdh_clnt_cert to 1. 2557 * For example, the cert have an ECC 2558 * key on the same curve as the server's 2559 * and the key should be authorized for 2560 * key agreement. 2561 * 2562 * One also needs to add code in ssl3_connect 2563 * to skip sending the certificate verify 2564 * message. 2565 * 2566 * if ((s->cert->key->privatekey != NULL) && 2567 * (s->cert->key->privatekey->type == 2568 * EVP_PKEY_EC) && ...) 2569 * ecdh_clnt_cert = 1; 2570 */ 2571 } 2572 2573 if (s->session->sess_cert->peer_ecdh_tmp != NULL) 2574 { 2575 tkey = s->session->sess_cert->peer_ecdh_tmp; 2576 } 2577 else 2578 { 2579 /* Get the Server Public Key from Cert */ 2580 srvr_pub_pkey = X509_get_pubkey(s->session-> \ 2581 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509); 2582 if ((srvr_pub_pkey == NULL) || 2583 (srvr_pub_pkey->type != EVP_PKEY_EC) || 2584 (srvr_pub_pkey->pkey.ec == NULL)) 2585 { 2586 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2587 ERR_R_INTERNAL_ERROR); 2588 goto err; 2589 } 2590 2591 tkey = srvr_pub_pkey->pkey.ec; 2592 } 2593 2594 srvr_group = EC_KEY_get0_group(tkey); 2595 srvr_ecpoint = EC_KEY_get0_public_key(tkey); 2596 2597 if ((srvr_group == NULL) || (srvr_ecpoint == NULL)) 2598 { 2599 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2600 ERR_R_INTERNAL_ERROR); 2601 goto err; 2602 } 2603 2604 if ((clnt_ecdh=EC_KEY_new()) == NULL) 2605 { 2606 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2607 goto err; 2608 } 2609 2610 if (!EC_KEY_set_group(clnt_ecdh, srvr_group)) 2611 { 2612 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB); 2613 goto err; 2614 } 2615 if (ecdh_clnt_cert) 2616 { 2617 /* Reuse key info from our certificate 2618 * We only need our private key to perform 2619 * the ECDH computation. 2620 */ 2621 const BIGNUM *priv_key; 2622 tkey = s->cert->key->privatekey->pkey.ec; 2623 priv_key = EC_KEY_get0_private_key(tkey); 2624 if (priv_key == NULL) 2625 { 2626 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2627 goto err; 2628 } 2629 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key)) 2630 { 2631 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB); 2632 goto err; 2633 } 2634 } 2635 else 2636 { 2637 /* Generate a new ECDH key pair */ 2638 if (!(EC_KEY_generate_key(clnt_ecdh))) 2639 { 2640 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB); 2641 goto err; 2642 } 2643 } 2644 2645 /* use the 'p' output buffer for the ECDH key, but 2646 * make sure to clear it out afterwards 2647 */ 2648 2649 field_size = EC_GROUP_get_degree(srvr_group); 2650 if (field_size <= 0) 2651 { 2652 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2653 ERR_R_ECDH_LIB); 2654 goto err; 2655 } 2656 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL); 2657 if (n <= 0) 2658 { 2659 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2660 ERR_R_ECDH_LIB); 2661 goto err; 2662 } 2663 2664 /* generate master key from the result */ 2665 s->session->master_key_length = s->method->ssl3_enc \ 2666 -> generate_master_secret(s, 2667 s->session->master_key, 2668 p, n); 2669 2670 memset(p, 0, n); /* clean up */ 2671 2672 if (ecdh_clnt_cert) 2673 { 2674 /* Send empty client key exch message */ 2675 n = 0; 2676 } 2677 else 2678 { 2679 /* First check the size of encoding and 2680 * allocate memory accordingly. 2681 */ 2682 encoded_pt_len = 2683 EC_POINT_point2oct(srvr_group, 2684 EC_KEY_get0_public_key(clnt_ecdh), 2685 POINT_CONVERSION_UNCOMPRESSED, 2686 NULL, 0, NULL); 2687 2688 encodedPoint = (unsigned char *) 2689 OPENSSL_malloc(encoded_pt_len * 2690 sizeof(unsigned char)); 2691 bn_ctx = BN_CTX_new(); 2692 if ((encodedPoint == NULL) || 2693 (bn_ctx == NULL)) 2694 { 2695 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2696 goto err; 2697 } 2698 2699 /* Encode the public key */ 2700 n = EC_POINT_point2oct(srvr_group, 2701 EC_KEY_get0_public_key(clnt_ecdh), 2702 POINT_CONVERSION_UNCOMPRESSED, 2703 encodedPoint, encoded_pt_len, bn_ctx); 2704 2705 *p = n; /* length of encoded point */ 2706 /* Encoded point will be copied here */ 2707 p += 1; 2708 /* copy the point */ 2709 memcpy((unsigned char *)p, encodedPoint, n); 2710 /* increment n to account for length field */ 2711 n += 1; 2712 } 2713 2714 /* Free allocated memory */ 2715 BN_CTX_free(bn_ctx); 2716 if (encodedPoint != NULL) OPENSSL_free(encodedPoint); 2717 if (clnt_ecdh != NULL) 2718 EC_KEY_free(clnt_ecdh); 2719 EVP_PKEY_free(srvr_pub_pkey); 2720 } 2721#endif /* !OPENSSL_NO_ECDH */ 2722 else if (alg_k & SSL_kGOST) 2723 { 2724 /* GOST key exchange message creation */ 2725 EVP_PKEY_CTX *pkey_ctx; 2726 X509 *peer_cert; 2727 size_t msglen; 2728 unsigned int md_len; 2729 int keytype; 2730 unsigned char premaster_secret[32],shared_ukm[32], tmp[256]; 2731 EVP_MD_CTX *ukm_hash; 2732 EVP_PKEY *pub_key; 2733 2734 /* Get server sertificate PKEY and create ctx from it */ 2735 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST01)].x509; 2736 if (!peer_cert) 2737 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST94)].x509; 2738 if (!peer_cert) { 2739 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER); 2740 goto err; 2741 } 2742 2743 pkey_ctx=EVP_PKEY_CTX_new(pub_key=X509_get_pubkey(peer_cert),NULL); 2744 /* If we have send a certificate, and certificate key 2745 2746 * parameters match those of server certificate, use 2747 * certificate key for key exchange 2748 */ 2749 2750 /* Otherwise, generate ephemeral key pair */ 2751 2752 EVP_PKEY_encrypt_init(pkey_ctx); 2753 /* Generate session key */ 2754 RAND_bytes(premaster_secret,32); 2755 /* If we have client certificate, use its secret as peer key */ 2756 if (s->s3->tmp.cert_req && s->cert->key->privatekey) { 2757 if (EVP_PKEY_derive_set_peer(pkey_ctx,s->cert->key->privatekey) <=0) { 2758 /* If there was an error - just ignore it. Ephemeral key 2759 * would be used 2760 */ 2761 ERR_clear_error(); 2762 } 2763 } 2764 /* Compute shared IV and store it in algorithm-specific 2765 * context data */ 2766 ukm_hash = EVP_MD_CTX_create(); 2767 EVP_DigestInit(ukm_hash,EVP_get_digestbynid(NID_id_GostR3411_94)); 2768 EVP_DigestUpdate(ukm_hash,s->s3->client_random,SSL3_RANDOM_SIZE); 2769 EVP_DigestUpdate(ukm_hash,s->s3->server_random,SSL3_RANDOM_SIZE); 2770 EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len); 2771 EVP_MD_CTX_destroy(ukm_hash); 2772 if (EVP_PKEY_CTX_ctrl(pkey_ctx,-1,EVP_PKEY_OP_ENCRYPT,EVP_PKEY_CTRL_SET_IV, 2773 8,shared_ukm)<0) { 2774 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2775 SSL_R_LIBRARY_BUG); 2776 goto err; 2777 } 2778 /* Make GOST keytransport blob message */ 2779 /*Encapsulate it into sequence */ 2780 *(p++)=V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED; 2781 msglen=255; 2782 if (EVP_PKEY_encrypt(pkey_ctx,tmp,&msglen,premaster_secret,32)<0) { 2783 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2784 SSL_R_LIBRARY_BUG); 2785 goto err; 2786 } 2787 if (msglen >= 0x80) 2788 { 2789 *(p++)=0x81; 2790 *(p++)= msglen & 0xff; 2791 n=msglen+3; 2792 } 2793 else 2794 { 2795 *(p++)= msglen & 0xff; 2796 n=msglen+2; 2797 } 2798 memcpy(p, tmp, msglen); 2799 /* Check if pubkey from client certificate was used */ 2800 if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0) 2801 { 2802 /* Set flag "skip certificate verify" */ 2803 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY; 2804 } 2805 EVP_PKEY_CTX_free(pkey_ctx); 2806 s->session->master_key_length= 2807 s->method->ssl3_enc->generate_master_secret(s, 2808 s->session->master_key,premaster_secret,32); 2809 EVP_PKEY_free(pub_key); 2810 2811 } 2812#ifndef OPENSSL_NO_SRP 2813 else if (alg_k & SSL_kSRP) 2814 { 2815 if (s->srp_ctx.A != NULL) 2816 { 2817 /* send off the data */ 2818 n=BN_num_bytes(s->srp_ctx.A); 2819 s2n(n,p); 2820 BN_bn2bin(s->srp_ctx.A,p); 2821 n+=2; 2822 } 2823 else 2824 { 2825 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 2826 goto err; 2827 } 2828 if (s->session->srp_username != NULL) 2829 OPENSSL_free(s->session->srp_username); 2830 s->session->srp_username = BUF_strdup(s->srp_ctx.login); 2831 if (s->session->srp_username == NULL) 2832 { 2833 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2834 ERR_R_MALLOC_FAILURE); 2835 goto err; 2836 } 2837 2838 if ((s->session->master_key_length = SRP_generate_client_master_secret(s,s->session->master_key))<0) 2839 { 2840 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 2841 goto err; 2842 } 2843 } 2844#endif 2845#ifndef OPENSSL_NO_PSK 2846 else if (alg_k & SSL_kPSK) 2847 { 2848 char identity[PSK_MAX_IDENTITY_LEN]; 2849 unsigned char *t = NULL; 2850 unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4]; 2851 unsigned int pre_ms_len = 0, psk_len = 0; 2852 int psk_err = 1; 2853 2854 n = 0; 2855 if (s->psk_client_callback == NULL) 2856 { 2857 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2858 SSL_R_PSK_NO_CLIENT_CB); 2859 goto err; 2860 } 2861 2862 psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint, 2863 identity, PSK_MAX_IDENTITY_LEN, 2864 psk_or_pre_ms, sizeof(psk_or_pre_ms)); 2865 if (psk_len > PSK_MAX_PSK_LEN) 2866 { 2867 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2868 ERR_R_INTERNAL_ERROR); 2869 goto psk_err; 2870 } 2871 else if (psk_len == 0) 2872 { 2873 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2874 SSL_R_PSK_IDENTITY_NOT_FOUND); 2875 goto psk_err; 2876 } 2877 2878 /* create PSK pre_master_secret */ 2879 pre_ms_len = 2+psk_len+2+psk_len; 2880 t = psk_or_pre_ms; 2881 memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len); 2882 s2n(psk_len, t); 2883 memset(t, 0, psk_len); 2884 t+=psk_len; 2885 s2n(psk_len, t); 2886 2887 if (s->session->psk_identity_hint != NULL) 2888 OPENSSL_free(s->session->psk_identity_hint); 2889 s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint); 2890 if (s->ctx->psk_identity_hint != NULL && 2891 s->session->psk_identity_hint == NULL) 2892 { 2893 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2894 ERR_R_MALLOC_FAILURE); 2895 goto psk_err; 2896 } 2897 2898 if (s->session->psk_identity != NULL) 2899 OPENSSL_free(s->session->psk_identity); 2900 s->session->psk_identity = BUF_strdup(identity); 2901 if (s->session->psk_identity == NULL) 2902 { 2903 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2904 ERR_R_MALLOC_FAILURE); 2905 goto psk_err; 2906 } 2907 2908 s->session->master_key_length = 2909 s->method->ssl3_enc->generate_master_secret(s, 2910 s->session->master_key, 2911 psk_or_pre_ms, pre_ms_len); 2912 n = strlen(identity); 2913 s2n(n, p); 2914 memcpy(p, identity, n); 2915 n+=2; 2916 psk_err = 0; 2917 psk_err: 2918 OPENSSL_cleanse(identity, PSK_MAX_IDENTITY_LEN); 2919 OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms)); 2920 if (psk_err != 0) 2921 { 2922 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); 2923 goto err; 2924 } 2925 } 2926#endif 2927 else 2928 { 2929 ssl3_send_alert(s, SSL3_AL_FATAL, 2930 SSL_AD_HANDSHAKE_FAILURE); 2931 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2932 ERR_R_INTERNAL_ERROR); 2933 goto err; 2934 } 2935 2936 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE; 2937 l2n3(n,d); 2938 2939 s->state=SSL3_ST_CW_KEY_EXCH_B; 2940 /* number of bytes to write */ 2941 s->init_num=n+4; 2942 s->init_off=0; 2943 } 2944 2945 /* SSL3_ST_CW_KEY_EXCH_B */ 2946 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 2947err: 2948#ifndef OPENSSL_NO_ECDH 2949 BN_CTX_free(bn_ctx); 2950 if (encodedPoint != NULL) OPENSSL_free(encodedPoint); 2951 if (clnt_ecdh != NULL) 2952 EC_KEY_free(clnt_ecdh); 2953 EVP_PKEY_free(srvr_pub_pkey); 2954#endif 2955 return(-1); 2956 } 2957 2958int ssl3_send_client_verify(SSL *s) 2959 { 2960 unsigned char *p,*d; 2961 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH]; 2962 EVP_PKEY *pkey; 2963 EVP_PKEY_CTX *pctx=NULL; 2964 EVP_MD_CTX mctx; 2965 unsigned u=0; 2966 unsigned long n; 2967 int j; 2968 2969 EVP_MD_CTX_init(&mctx); 2970 2971 if (s->state == SSL3_ST_CW_CERT_VRFY_A) 2972 { 2973 d=(unsigned char *)s->init_buf->data; 2974 p= &(d[4]); 2975 pkey=s->cert->key->privatekey; 2976/* Create context from key and test if sha1 is allowed as digest */ 2977 pctx = EVP_PKEY_CTX_new(pkey,NULL); 2978 EVP_PKEY_sign_init(pctx); 2979 if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1())>0) 2980 { 2981 if (TLS1_get_version(s) < TLS1_2_VERSION) 2982 s->method->ssl3_enc->cert_verify_mac(s, 2983 NID_sha1, 2984 &(data[MD5_DIGEST_LENGTH])); 2985 } 2986 else 2987 { 2988 ERR_clear_error(); 2989 } 2990 /* For TLS v1.2 send signature algorithm and signature 2991 * using agreed digest and cached handshake records. 2992 */ 2993 if (TLS1_get_version(s) >= TLS1_2_VERSION) 2994 { 2995 long hdatalen = 0; 2996 void *hdata; 2997 const EVP_MD *md = s->cert->key->digest; 2998 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, 2999 &hdata); 3000 if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md)) 3001 { 3002 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, 3003 ERR_R_INTERNAL_ERROR); 3004 goto err; 3005 } 3006 p += 2; 3007#ifdef SSL_DEBUG 3008 fprintf(stderr, "Using TLS 1.2 with client alg %s\n", 3009 EVP_MD_name(md)); 3010#endif 3011 if (!EVP_SignInit_ex(&mctx, md, NULL) 3012 || !EVP_SignUpdate(&mctx, hdata, hdatalen) 3013 || !EVP_SignFinal(&mctx, p + 2, &u, pkey)) 3014 { 3015 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, 3016 ERR_R_EVP_LIB); 3017 goto err; 3018 } 3019 s2n(u,p); 3020 n = u + 4; 3021 if (!ssl3_digest_cached_records(s)) 3022 goto err; 3023 } 3024 else 3025#ifndef OPENSSL_NO_RSA 3026 if (pkey->type == EVP_PKEY_RSA) 3027 { 3028 s->method->ssl3_enc->cert_verify_mac(s, 3029 NID_md5, 3030 &(data[0])); 3031 if (RSA_sign(NID_md5_sha1, data, 3032 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH, 3033 &(p[2]), &u, pkey->pkey.rsa) <= 0 ) 3034 { 3035 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB); 3036 goto err; 3037 } 3038 s2n(u,p); 3039 n=u+2; 3040 } 3041 else 3042#endif 3043#ifndef OPENSSL_NO_DSA 3044 if (pkey->type == EVP_PKEY_DSA) 3045 { 3046 if (!DSA_sign(pkey->save_type, 3047 &(data[MD5_DIGEST_LENGTH]), 3048 SHA_DIGEST_LENGTH,&(p[2]), 3049 (unsigned int *)&j,pkey->pkey.dsa)) 3050 { 3051 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB); 3052 goto err; 3053 } 3054 s2n(j,p); 3055 n=j+2; 3056 } 3057 else 3058#endif 3059#ifndef OPENSSL_NO_ECDSA 3060 if (pkey->type == EVP_PKEY_EC) 3061 { 3062 if (!ECDSA_sign(pkey->save_type, 3063 &(data[MD5_DIGEST_LENGTH]), 3064 SHA_DIGEST_LENGTH,&(p[2]), 3065 (unsigned int *)&j,pkey->pkey.ec)) 3066 { 3067 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, 3068 ERR_R_ECDSA_LIB); 3069 goto err; 3070 } 3071 s2n(j,p); 3072 n=j+2; 3073 } 3074 else 3075#endif 3076 if (pkey->type == NID_id_GostR3410_94 || pkey->type == NID_id_GostR3410_2001) 3077 { 3078 unsigned char signbuf[64]; 3079 int i; 3080 size_t sigsize=64; 3081 s->method->ssl3_enc->cert_verify_mac(s, 3082 NID_id_GostR3411_94, 3083 data); 3084 if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) { 3085 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, 3086 ERR_R_INTERNAL_ERROR); 3087 goto err; 3088 } 3089 for (i=63,j=0; i>=0; j++, i--) { 3090 p[2+j]=signbuf[i]; 3091 } 3092 s2n(j,p); 3093 n=j+2; 3094 } 3095 else 3096 { 3097 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR); 3098 goto err; 3099 } 3100 *(d++)=SSL3_MT_CERTIFICATE_VERIFY; 3101 l2n3(n,d); 3102 3103 s->state=SSL3_ST_CW_CERT_VRFY_B; 3104 s->init_num=(int)n+4; 3105 s->init_off=0; 3106 } 3107 EVP_MD_CTX_cleanup(&mctx); 3108 EVP_PKEY_CTX_free(pctx); 3109 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 3110err: 3111 EVP_MD_CTX_cleanup(&mctx); 3112 EVP_PKEY_CTX_free(pctx); 3113 return(-1); 3114 } 3115 3116int ssl3_send_client_certificate(SSL *s) 3117 { 3118 X509 *x509=NULL; 3119 EVP_PKEY *pkey=NULL; 3120 int i; 3121 unsigned long l; 3122 3123 if (s->state == SSL3_ST_CW_CERT_A) 3124 { 3125 if ((s->cert == NULL) || 3126 (s->cert->key->x509 == NULL) || 3127 (s->cert->key->privatekey == NULL)) 3128 s->state=SSL3_ST_CW_CERT_B; 3129 else 3130 s->state=SSL3_ST_CW_CERT_C; 3131 } 3132 3133 /* We need to get a client cert */ 3134 if (s->state == SSL3_ST_CW_CERT_B) 3135 { 3136 /* If we get an error, we need to 3137 * ssl->rwstate=SSL_X509_LOOKUP; return(-1); 3138 * We then get retied later */ 3139 i=0; 3140 i = ssl_do_client_cert_cb(s, &x509, &pkey); 3141 if (i < 0) 3142 { 3143 s->rwstate=SSL_X509_LOOKUP; 3144 return(-1); 3145 } 3146 s->rwstate=SSL_NOTHING; 3147 if ((i == 1) && (pkey != NULL) && (x509 != NULL)) 3148 { 3149 s->state=SSL3_ST_CW_CERT_B; 3150 if ( !SSL_use_certificate(s,x509) || 3151 !SSL_use_PrivateKey(s,pkey)) 3152 i=0; 3153 } 3154 else if (i == 1) 3155 { 3156 i=0; 3157 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); 3158 } 3159 3160 if (x509 != NULL) X509_free(x509); 3161 if (pkey != NULL) EVP_PKEY_free(pkey); 3162 if (i == 0) 3163 { 3164 if (s->version == SSL3_VERSION) 3165 { 3166 s->s3->tmp.cert_req=0; 3167 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE); 3168 return(1); 3169 } 3170 else 3171 { 3172 s->s3->tmp.cert_req=2; 3173 } 3174 } 3175 3176 /* Ok, we have a cert */ 3177 s->state=SSL3_ST_CW_CERT_C; 3178 } 3179 3180 if (s->state == SSL3_ST_CW_CERT_C) 3181 { 3182 s->state=SSL3_ST_CW_CERT_D; 3183 l=ssl3_output_cert_chain(s, 3184 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509); 3185 s->init_num=(int)l; 3186 s->init_off=0; 3187 } 3188 /* SSL3_ST_CW_CERT_D */ 3189 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 3190 } 3191 3192#define has_bits(i,m) (((i)&(m)) == (m)) 3193 3194int ssl3_check_cert_and_algorithm(SSL *s) 3195 { 3196 int i,idx; 3197 long alg_k,alg_a; 3198 EVP_PKEY *pkey=NULL; 3199 SESS_CERT *sc; 3200#ifndef OPENSSL_NO_RSA 3201 RSA *rsa; 3202#endif 3203#ifndef OPENSSL_NO_DH 3204 DH *dh; 3205#endif 3206 3207 alg_k=s->s3->tmp.new_cipher->algorithm_mkey; 3208 alg_a=s->s3->tmp.new_cipher->algorithm_auth; 3209 3210 /* we don't have a certificate */ 3211 if ((alg_a & (SSL_aDH|SSL_aNULL|SSL_aKRB5)) || (alg_k & SSL_kPSK)) 3212 return(1); 3213 3214 sc=s->session->sess_cert; 3215 if (sc == NULL) 3216 { 3217 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR); 3218 goto err; 3219 } 3220 3221#ifndef OPENSSL_NO_RSA 3222 rsa=s->session->sess_cert->peer_rsa_tmp; 3223#endif 3224#ifndef OPENSSL_NO_DH 3225 dh=s->session->sess_cert->peer_dh_tmp; 3226#endif 3227 3228 /* This is the passed certificate */ 3229 3230 idx=sc->peer_cert_type; 3231#ifndef OPENSSL_NO_ECDH 3232 if (idx == SSL_PKEY_ECC) 3233 { 3234 if (ssl_check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509, 3235 s) == 0) 3236 { /* check failed */ 3237 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT); 3238 goto f_err; 3239 } 3240 else 3241 { 3242 return 1; 3243 } 3244 } 3245#endif 3246 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509); 3247 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey); 3248 EVP_PKEY_free(pkey); 3249 3250 3251 /* Check that we have a certificate if we require one */ 3252 if ((alg_a & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN)) 3253 { 3254 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT); 3255 goto f_err; 3256 } 3257#ifndef OPENSSL_NO_DSA 3258 else if ((alg_a & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN)) 3259 { 3260 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT); 3261 goto f_err; 3262 } 3263#endif 3264#ifndef OPENSSL_NO_RSA 3265 if ((alg_k & SSL_kRSA) && 3266 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL))) 3267 { 3268 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT); 3269 goto f_err; 3270 } 3271#endif 3272#ifndef OPENSSL_NO_DH 3273 if ((alg_k & SSL_kEDH) && 3274 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL))) 3275 { 3276 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY); 3277 goto f_err; 3278 } 3279 else if ((alg_k & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA)) 3280 { 3281 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT); 3282 goto f_err; 3283 } 3284#ifndef OPENSSL_NO_DSA 3285 else if ((alg_k & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA)) 3286 { 3287 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT); 3288 goto f_err; 3289 } 3290#endif 3291#endif 3292 3293 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP)) 3294 { 3295#ifndef OPENSSL_NO_RSA 3296 if (alg_k & SSL_kRSA) 3297 { 3298 if (rsa == NULL 3299 || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) 3300 { 3301 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY); 3302 goto f_err; 3303 } 3304 } 3305 else 3306#endif 3307#ifndef OPENSSL_NO_DH 3308 if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) 3309 { 3310 if (dh == NULL 3311 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) 3312 { 3313 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY); 3314 goto f_err; 3315 } 3316 } 3317 else 3318#endif 3319 { 3320 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE); 3321 goto f_err; 3322 } 3323 } 3324 return(1); 3325f_err: 3326 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); 3327err: 3328 return(0); 3329 } 3330 3331#if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG) 3332int ssl3_send_next_proto(SSL *s) 3333 { 3334 unsigned int len, padding_len; 3335 unsigned char *d; 3336 3337 if (s->state == SSL3_ST_CW_NEXT_PROTO_A) 3338 { 3339 len = s->next_proto_negotiated_len; 3340 padding_len = 32 - ((len + 2) % 32); 3341 d = (unsigned char *)s->init_buf->data; 3342 d[4] = len; 3343 memcpy(d + 5, s->next_proto_negotiated, len); 3344 d[5 + len] = padding_len; 3345 memset(d + 6 + len, 0, padding_len); 3346 *(d++)=SSL3_MT_NEXT_PROTO; 3347 l2n3(2 + len + padding_len, d); 3348 s->state = SSL3_ST_CW_NEXT_PROTO_B; 3349 s->init_num = 4 + 2 + len + padding_len; 3350 s->init_off = 0; 3351 } 3352 3353 return ssl3_do_write(s, SSL3_RT_HANDSHAKE); 3354} 3355#endif /* !OPENSSL_NO_TLSEXT && !OPENSSL_NO_NEXTPROTONEG */ 3356 3357/* Check to see if handshake is full or resumed. Usually this is just a 3358 * case of checking to see if a cache hit has occurred. In the case of 3359 * session tickets we have to check the next message to be sure. 3360 */ 3361 3362#ifndef OPENSSL_NO_TLSEXT 3363int ssl3_check_finished(SSL *s) 3364 { 3365 int ok; 3366 long n; 3367 /* If we have no ticket it cannot be a resumed session. */ 3368 if (!s->session->tlsext_tick) 3369 return 1; 3370 /* this function is called when we really expect a Certificate 3371 * message, so permit appropriate message length */ 3372 n=s->method->ssl_get_message(s, 3373 SSL3_ST_CR_CERT_A, 3374 SSL3_ST_CR_CERT_B, 3375 -1, 3376 s->max_cert_list, 3377 &ok); 3378 if (!ok) return((int)n); 3379 s->s3->tmp.reuse_message = 1; 3380 if ((s->s3->tmp.message_type == SSL3_MT_FINISHED) 3381 || (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET)) 3382 return 2; 3383 3384 return 1; 3385 } 3386#endif 3387 3388int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey) 3389 { 3390 int i = 0; 3391#ifndef OPENSSL_NO_ENGINE 3392 if (s->ctx->client_cert_engine) 3393 { 3394 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s, 3395 SSL_get_client_CA_list(s), 3396 px509, ppkey, NULL, NULL, NULL); 3397 if (i != 0) 3398 return i; 3399 } 3400#endif 3401 if (s->ctx->client_cert_cb) 3402 i = s->ctx->client_cert_cb(s,px509,ppkey); 3403 return i; 3404 } 3405