s3_clnt.c revision 267103
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 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; 684 685 if (ssl_fill_hello_random(s, 0, p, SSL3_RANDOM_SIZE) <= 0) 686 goto err; 687 688 /* Do the message type and length last */ 689 d=p= &(buf[4]); 690 691 /* version indicates the negotiated version: for example from 692 * an SSLv2/v3 compatible client hello). The client_version 693 * field is the maximum version we permit and it is also 694 * used in RSA encrypted premaster secrets. Some servers can 695 * choke if we initially report a higher version then 696 * renegotiate to a lower one in the premaster secret. This 697 * didn't happen with TLS 1.0 as most servers supported it 698 * but it can with TLS 1.1 or later if the server only supports 699 * 1.0. 700 * 701 * Possible scenario with previous logic: 702 * 1. Client hello indicates TLS 1.2 703 * 2. Server hello says TLS 1.0 704 * 3. RSA encrypted premaster secret uses 1.2. 705 * 4. Handhaked proceeds using TLS 1.0. 706 * 5. Server sends hello request to renegotiate. 707 * 6. Client hello indicates TLS v1.0 as we now 708 * know that is maximum server supports. 709 * 7. Server chokes on RSA encrypted premaster secret 710 * containing version 1.0. 711 * 712 * For interoperability it should be OK to always use the 713 * maximum version we support in client hello and then rely 714 * on the checking of version to ensure the servers isn't 715 * being inconsistent: for example initially negotiating with 716 * TLS 1.0 and renegotiating with TLS 1.2. We do this by using 717 * client_version in client hello and not resetting it to 718 * the negotiated version. 719 */ 720#if 0 721 *(p++)=s->version>>8; 722 *(p++)=s->version&0xff; 723 s->client_version=s->version; 724#else 725 *(p++)=s->client_version>>8; 726 *(p++)=s->client_version&0xff; 727#endif 728 729 /* Random stuff */ 730 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE); 731 p+=SSL3_RANDOM_SIZE; 732 733 /* Session ID */ 734 if (s->new_session) 735 i=0; 736 else 737 i=s->session->session_id_length; 738 *(p++)=i; 739 if (i != 0) 740 { 741 if (i > (int)sizeof(s->session->session_id)) 742 { 743 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); 744 goto err; 745 } 746 memcpy(p,s->session->session_id,i); 747 p+=i; 748 } 749 750 /* Ciphers supported */ 751 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0); 752 if (i == 0) 753 { 754 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE); 755 goto err; 756 } 757#ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH 758 /* Some servers hang if client hello > 256 bytes 759 * as hack workaround chop number of supported ciphers 760 * to keep it well below this if we use TLS v1.2 761 */ 762 if (TLS1_get_version(s) >= TLS1_2_VERSION 763 && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH) 764 i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1; 765#endif 766 s2n(i,p); 767 p+=i; 768 769 /* COMPRESSION */ 770#ifdef OPENSSL_NO_COMP 771 *(p++)=1; 772#else 773 774 if ((s->options & SSL_OP_NO_COMPRESSION) 775 || !s->ctx->comp_methods) 776 j=0; 777 else 778 j=sk_SSL_COMP_num(s->ctx->comp_methods); 779 *(p++)=1+j; 780 for (i=0; i<j; i++) 781 { 782 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i); 783 *(p++)=comp->id; 784 } 785#endif 786 *(p++)=0; /* Add the NULL method */ 787 788#ifndef OPENSSL_NO_TLSEXT 789 /* TLS extensions*/ 790 if (ssl_prepare_clienthello_tlsext(s) <= 0) 791 { 792 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT); 793 goto err; 794 } 795 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL) 796 { 797 SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR); 798 goto err; 799 } 800#endif 801 802 l=(p-d); 803 d=buf; 804 *(d++)=SSL3_MT_CLIENT_HELLO; 805 l2n3(l,d); 806 807 s->state=SSL3_ST_CW_CLNT_HELLO_B; 808 /* number of bytes to write */ 809 s->init_num=p-buf; 810 s->init_off=0; 811 } 812 813 /* SSL3_ST_CW_CLNT_HELLO_B */ 814 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 815err: 816 return(-1); 817 } 818 819int ssl3_get_server_hello(SSL *s) 820 { 821 STACK_OF(SSL_CIPHER) *sk; 822 const SSL_CIPHER *c; 823 unsigned char *p,*d; 824 int i,al,ok; 825 unsigned int j; 826 long n; 827#ifndef OPENSSL_NO_COMP 828 SSL_COMP *comp; 829#endif 830 831 n=s->method->ssl_get_message(s, 832 SSL3_ST_CR_SRVR_HELLO_A, 833 SSL3_ST_CR_SRVR_HELLO_B, 834 -1, 835 20000, /* ?? */ 836 &ok); 837 838 if (!ok) return((int)n); 839 840 if ( SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER) 841 { 842 if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST) 843 { 844 if ( s->d1->send_cookie == 0) 845 { 846 s->s3->tmp.reuse_message = 1; 847 return 1; 848 } 849 else /* already sent a cookie */ 850 { 851 al=SSL_AD_UNEXPECTED_MESSAGE; 852 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE); 853 goto f_err; 854 } 855 } 856 } 857 858 if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO) 859 { 860 al=SSL_AD_UNEXPECTED_MESSAGE; 861 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE); 862 goto f_err; 863 } 864 865 d=p=(unsigned char *)s->init_msg; 866 867 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff))) 868 { 869 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION); 870 s->version=(s->version&0xff00)|p[1]; 871 al=SSL_AD_PROTOCOL_VERSION; 872 goto f_err; 873 } 874 p+=2; 875 876 /* load the server hello data */ 877 /* load the server random */ 878 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE); 879 p+=SSL3_RANDOM_SIZE; 880 881 /* get the session-id */ 882 j= *(p++); 883 884 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE)) 885 { 886 al=SSL_AD_ILLEGAL_PARAMETER; 887 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG); 888 goto f_err; 889 } 890 891#ifndef OPENSSL_NO_TLSEXT 892 /* check if we want to resume the session based on external pre-shared secret */ 893 if (s->version >= TLS1_VERSION && s->tls_session_secret_cb) 894 { 895 SSL_CIPHER *pref_cipher=NULL; 896 s->session->master_key_length=sizeof(s->session->master_key); 897 if (s->tls_session_secret_cb(s, s->session->master_key, 898 &s->session->master_key_length, 899 NULL, &pref_cipher, 900 s->tls_session_secret_cb_arg)) 901 { 902 s->session->cipher = pref_cipher ? 903 pref_cipher : ssl_get_cipher_by_char(s, p+j); 904 } 905 } 906#endif /* OPENSSL_NO_TLSEXT */ 907 908 if (j != 0 && j == s->session->session_id_length 909 && memcmp(p,s->session->session_id,j) == 0) 910 { 911 if(s->sid_ctx_length != s->session->sid_ctx_length 912 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length)) 913 { 914 /* actually a client application bug */ 915 al=SSL_AD_ILLEGAL_PARAMETER; 916 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); 917 goto f_err; 918 } 919 s->s3->flags |= SSL3_FLAGS_CCS_OK; 920 s->hit=1; 921 } 922 else /* a miss or crap from the other end */ 923 { 924 /* If we were trying for session-id reuse, make a new 925 * SSL_SESSION so we don't stuff up other people */ 926 s->hit=0; 927 if (s->session->session_id_length > 0) 928 { 929 if (!ssl_get_new_session(s,0)) 930 { 931 al=SSL_AD_INTERNAL_ERROR; 932 goto f_err; 933 } 934 } 935 s->session->session_id_length=j; 936 memcpy(s->session->session_id,p,j); /* j could be 0 */ 937 } 938 p+=j; 939 c=ssl_get_cipher_by_char(s,p); 940 if (c == NULL) 941 { 942 /* unknown cipher */ 943 al=SSL_AD_ILLEGAL_PARAMETER; 944 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED); 945 goto f_err; 946 } 947 /* TLS v1.2 only ciphersuites require v1.2 or later */ 948 if ((c->algorithm_ssl & SSL_TLSV1_2) && 949 (TLS1_get_version(s) < TLS1_2_VERSION)) 950 { 951 al=SSL_AD_ILLEGAL_PARAMETER; 952 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED); 953 goto f_err; 954 } 955 p+=ssl_put_cipher_by_char(s,NULL,NULL); 956 957 sk=ssl_get_ciphers_by_id(s); 958 i=sk_SSL_CIPHER_find(sk,c); 959 if (i < 0) 960 { 961 /* we did not say we would use this cipher */ 962 al=SSL_AD_ILLEGAL_PARAMETER; 963 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED); 964 goto f_err; 965 } 966 967 /* Depending on the session caching (internal/external), the cipher 968 and/or cipher_id values may not be set. Make sure that 969 cipher_id is set and use it for comparison. */ 970 if (s->session->cipher) 971 s->session->cipher_id = s->session->cipher->id; 972 if (s->hit && (s->session->cipher_id != c->id)) 973 { 974/* Workaround is now obsolete */ 975#if 0 976 if (!(s->options & 977 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG)) 978#endif 979 { 980 al=SSL_AD_ILLEGAL_PARAMETER; 981 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); 982 goto f_err; 983 } 984 } 985 s->s3->tmp.new_cipher=c; 986 /* Don't digest cached records if TLS v1.2: we may need them for 987 * client authentication. 988 */ 989 if (TLS1_get_version(s) < TLS1_2_VERSION && !ssl3_digest_cached_records(s)) 990 { 991 al = SSL_AD_INTERNAL_ERROR; 992 goto f_err; 993 } 994 /* lets get the compression algorithm */ 995 /* COMPRESSION */ 996#ifdef OPENSSL_NO_COMP 997 if (*(p++) != 0) 998 { 999 al=SSL_AD_ILLEGAL_PARAMETER; 1000 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); 1001 goto f_err; 1002 } 1003 /* If compression is disabled we'd better not try to resume a session 1004 * using compression. 1005 */ 1006 if (s->session->compress_meth != 0) 1007 { 1008 al=SSL_AD_INTERNAL_ERROR; 1009 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_INCONSISTENT_COMPRESSION); 1010 goto f_err; 1011 } 1012#else 1013 j= *(p++); 1014 if (s->hit && j != s->session->compress_meth) 1015 { 1016 al=SSL_AD_ILLEGAL_PARAMETER; 1017 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED); 1018 goto f_err; 1019 } 1020 if (j == 0) 1021 comp=NULL; 1022 else if (s->options & SSL_OP_NO_COMPRESSION) 1023 { 1024 al=SSL_AD_ILLEGAL_PARAMETER; 1025 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_COMPRESSION_DISABLED); 1026 goto f_err; 1027 } 1028 else 1029 comp=ssl3_comp_find(s->ctx->comp_methods,j); 1030 1031 if ((j != 0) && (comp == NULL)) 1032 { 1033 al=SSL_AD_ILLEGAL_PARAMETER; 1034 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); 1035 goto f_err; 1036 } 1037 else 1038 { 1039 s->s3->tmp.new_compression=comp; 1040 } 1041#endif 1042 1043#ifndef OPENSSL_NO_TLSEXT 1044 /* TLS extensions*/ 1045 if (s->version >= SSL3_VERSION) 1046 { 1047 if (!ssl_parse_serverhello_tlsext(s,&p,d,n, &al)) 1048 { 1049 /* 'al' set by ssl_parse_serverhello_tlsext */ 1050 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT); 1051 goto f_err; 1052 } 1053 if (ssl_check_serverhello_tlsext(s) <= 0) 1054 { 1055 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SERVERHELLO_TLSEXT); 1056 goto err; 1057 } 1058 } 1059#endif 1060 1061 if (p != (d+n)) 1062 { 1063 /* wrong packet length */ 1064 al=SSL_AD_DECODE_ERROR; 1065 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH); 1066 goto f_err; 1067 } 1068 1069 return(1); 1070f_err: 1071 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1072err: 1073 return(-1); 1074 } 1075 1076int ssl3_get_server_certificate(SSL *s) 1077 { 1078 int al,i,ok,ret= -1; 1079 unsigned long n,nc,llen,l; 1080 X509 *x=NULL; 1081 const unsigned char *q,*p; 1082 unsigned char *d; 1083 STACK_OF(X509) *sk=NULL; 1084 SESS_CERT *sc; 1085 EVP_PKEY *pkey=NULL; 1086 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */ 1087 1088 n=s->method->ssl_get_message(s, 1089 SSL3_ST_CR_CERT_A, 1090 SSL3_ST_CR_CERT_B, 1091 -1, 1092 s->max_cert_list, 1093 &ok); 1094 1095 if (!ok) return((int)n); 1096 1097 if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) || 1098 ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) && 1099 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE))) 1100 { 1101 s->s3->tmp.reuse_message=1; 1102 return(1); 1103 } 1104 1105 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE) 1106 { 1107 al=SSL_AD_UNEXPECTED_MESSAGE; 1108 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE); 1109 goto f_err; 1110 } 1111 p=d=(unsigned char *)s->init_msg; 1112 1113 if ((sk=sk_X509_new_null()) == NULL) 1114 { 1115 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE); 1116 goto err; 1117 } 1118 1119 n2l3(p,llen); 1120 if (llen+3 != n) 1121 { 1122 al=SSL_AD_DECODE_ERROR; 1123 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH); 1124 goto f_err; 1125 } 1126 for (nc=0; nc<llen; ) 1127 { 1128 n2l3(p,l); 1129 if ((l+nc+3) > llen) 1130 { 1131 al=SSL_AD_DECODE_ERROR; 1132 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); 1133 goto f_err; 1134 } 1135 1136 q=p; 1137 x=d2i_X509(NULL,&q,l); 1138 if (x == NULL) 1139 { 1140 al=SSL_AD_BAD_CERTIFICATE; 1141 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB); 1142 goto f_err; 1143 } 1144 if (q != (p+l)) 1145 { 1146 al=SSL_AD_DECODE_ERROR; 1147 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); 1148 goto f_err; 1149 } 1150 if (!sk_X509_push(sk,x)) 1151 { 1152 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE); 1153 goto err; 1154 } 1155 x=NULL; 1156 nc+=l+3; 1157 p=q; 1158 } 1159 1160 i=ssl_verify_cert_chain(s,sk); 1161 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0) 1162#ifndef OPENSSL_NO_KRB5 1163 && !((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) && 1164 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5)) 1165#endif /* OPENSSL_NO_KRB5 */ 1166 ) 1167 { 1168 al=ssl_verify_alarm_type(s->verify_result); 1169 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED); 1170 goto f_err; 1171 } 1172 ERR_clear_error(); /* but we keep s->verify_result */ 1173 1174 sc=ssl_sess_cert_new(); 1175 if (sc == NULL) goto err; 1176 1177 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert); 1178 s->session->sess_cert=sc; 1179 1180 sc->cert_chain=sk; 1181 /* Inconsistency alert: cert_chain does include the peer's 1182 * certificate, which we don't include in s3_srvr.c */ 1183 x=sk_X509_value(sk,0); 1184 sk=NULL; 1185 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/ 1186 1187 pkey=X509_get_pubkey(x); 1188 1189 /* VRS: allow null cert if auth == KRB5 */ 1190 need_cert = ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) && 1191 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5)) 1192 ? 0 : 1; 1193 1194#ifdef KSSL_DEBUG 1195 printf("pkey,x = %p, %p\n", pkey,x); 1196 printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey)); 1197 printf("cipher, alg, nc = %s, %lx, %lx, %d\n", s->s3->tmp.new_cipher->name, 1198 s->s3->tmp.new_cipher->algorithm_mkey, s->s3->tmp.new_cipher->algorithm_auth, need_cert); 1199#endif /* KSSL_DEBUG */ 1200 1201 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey))) 1202 { 1203 x=NULL; 1204 al=SSL3_AL_FATAL; 1205 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 1206 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); 1207 goto f_err; 1208 } 1209 1210 i=ssl_cert_type(x,pkey); 1211 if (need_cert && i < 0) 1212 { 1213 x=NULL; 1214 al=SSL3_AL_FATAL; 1215 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 1216 SSL_R_UNKNOWN_CERTIFICATE_TYPE); 1217 goto f_err; 1218 } 1219 1220 if (need_cert) 1221 { 1222 sc->peer_cert_type=i; 1223 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509); 1224 /* Why would the following ever happen? 1225 * We just created sc a couple of lines ago. */ 1226 if (sc->peer_pkeys[i].x509 != NULL) 1227 X509_free(sc->peer_pkeys[i].x509); 1228 sc->peer_pkeys[i].x509=x; 1229 sc->peer_key= &(sc->peer_pkeys[i]); 1230 1231 if (s->session->peer != NULL) 1232 X509_free(s->session->peer); 1233 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509); 1234 s->session->peer=x; 1235 } 1236 else 1237 { 1238 sc->peer_cert_type=i; 1239 sc->peer_key= NULL; 1240 1241 if (s->session->peer != NULL) 1242 X509_free(s->session->peer); 1243 s->session->peer=NULL; 1244 } 1245 s->session->verify_result = s->verify_result; 1246 1247 x=NULL; 1248 ret=1; 1249 1250 if (0) 1251 { 1252f_err: 1253 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1254 } 1255err: 1256 EVP_PKEY_free(pkey); 1257 X509_free(x); 1258 sk_X509_pop_free(sk,X509_free); 1259 return(ret); 1260 } 1261 1262int ssl3_get_key_exchange(SSL *s) 1263 { 1264#ifndef OPENSSL_NO_RSA 1265 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2]; 1266#endif 1267 EVP_MD_CTX md_ctx; 1268 unsigned char *param,*p; 1269 int al,i,j,param_len,ok; 1270 long n,alg_k,alg_a; 1271 EVP_PKEY *pkey=NULL; 1272 const EVP_MD *md = NULL; 1273#ifndef OPENSSL_NO_RSA 1274 RSA *rsa=NULL; 1275#endif 1276#ifndef OPENSSL_NO_DH 1277 DH *dh=NULL; 1278#endif 1279#ifndef OPENSSL_NO_ECDH 1280 EC_KEY *ecdh = NULL; 1281 BN_CTX *bn_ctx = NULL; 1282 EC_POINT *srvr_ecpoint = NULL; 1283 int curve_nid = 0; 1284 int encoded_pt_len = 0; 1285#endif 1286 1287 /* use same message size as in ssl3_get_certificate_request() 1288 * as ServerKeyExchange message may be skipped */ 1289 n=s->method->ssl_get_message(s, 1290 SSL3_ST_CR_KEY_EXCH_A, 1291 SSL3_ST_CR_KEY_EXCH_B, 1292 -1, 1293 s->max_cert_list, 1294 &ok); 1295 if (!ok) return((int)n); 1296 1297 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE) 1298 { 1299#ifndef OPENSSL_NO_PSK 1300 /* In plain PSK ciphersuite, ServerKeyExchange can be 1301 omitted if no identity hint is sent. Set 1302 session->sess_cert anyway to avoid problems 1303 later.*/ 1304 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK) 1305 { 1306 s->session->sess_cert=ssl_sess_cert_new(); 1307 if (s->ctx->psk_identity_hint) 1308 OPENSSL_free(s->ctx->psk_identity_hint); 1309 s->ctx->psk_identity_hint = NULL; 1310 } 1311#endif 1312 s->s3->tmp.reuse_message=1; 1313 return(1); 1314 } 1315 1316 param=p=(unsigned char *)s->init_msg; 1317 if (s->session->sess_cert != NULL) 1318 { 1319#ifndef OPENSSL_NO_RSA 1320 if (s->session->sess_cert->peer_rsa_tmp != NULL) 1321 { 1322 RSA_free(s->session->sess_cert->peer_rsa_tmp); 1323 s->session->sess_cert->peer_rsa_tmp=NULL; 1324 } 1325#endif 1326#ifndef OPENSSL_NO_DH 1327 if (s->session->sess_cert->peer_dh_tmp) 1328 { 1329 DH_free(s->session->sess_cert->peer_dh_tmp); 1330 s->session->sess_cert->peer_dh_tmp=NULL; 1331 } 1332#endif 1333#ifndef OPENSSL_NO_ECDH 1334 if (s->session->sess_cert->peer_ecdh_tmp) 1335 { 1336 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp); 1337 s->session->sess_cert->peer_ecdh_tmp=NULL; 1338 } 1339#endif 1340 } 1341 else 1342 { 1343 s->session->sess_cert=ssl_sess_cert_new(); 1344 } 1345 1346 param_len=0; 1347 alg_k=s->s3->tmp.new_cipher->algorithm_mkey; 1348 alg_a=s->s3->tmp.new_cipher->algorithm_auth; 1349 EVP_MD_CTX_init(&md_ctx); 1350 1351#ifndef OPENSSL_NO_PSK 1352 if (alg_k & SSL_kPSK) 1353 { 1354 char tmp_id_hint[PSK_MAX_IDENTITY_LEN+1]; 1355 1356 al=SSL_AD_HANDSHAKE_FAILURE; 1357 n2s(p,i); 1358 param_len=i+2; 1359 /* Store PSK identity hint for later use, hint is used 1360 * in ssl3_send_client_key_exchange. Assume that the 1361 * maximum length of a PSK identity hint can be as 1362 * long as the maximum length of a PSK identity. */ 1363 if (i > PSK_MAX_IDENTITY_LEN) 1364 { 1365 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1366 SSL_R_DATA_LENGTH_TOO_LONG); 1367 goto f_err; 1368 } 1369 if (param_len > n) 1370 { 1371 al=SSL_AD_DECODE_ERROR; 1372 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1373 SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH); 1374 goto f_err; 1375 } 1376 /* If received PSK identity hint contains NULL 1377 * characters, the hint is truncated from the first 1378 * NULL. p may not be ending with NULL, so create a 1379 * NULL-terminated string. */ 1380 memcpy(tmp_id_hint, p, i); 1381 memset(tmp_id_hint+i, 0, PSK_MAX_IDENTITY_LEN+1-i); 1382 if (s->ctx->psk_identity_hint != NULL) 1383 OPENSSL_free(s->ctx->psk_identity_hint); 1384 s->ctx->psk_identity_hint = BUF_strdup(tmp_id_hint); 1385 if (s->ctx->psk_identity_hint == NULL) 1386 { 1387 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); 1388 goto f_err; 1389 } 1390 1391 p+=i; 1392 n-=param_len; 1393 } 1394 else 1395#endif /* !OPENSSL_NO_PSK */ 1396#ifndef OPENSSL_NO_SRP 1397 if (alg_k & SSL_kSRP) 1398 { 1399 n2s(p,i); 1400 param_len=i+2; 1401 if (param_len > n) 1402 { 1403 al=SSL_AD_DECODE_ERROR; 1404 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_N_LENGTH); 1405 goto f_err; 1406 } 1407 if (!(s->srp_ctx.N=BN_bin2bn(p,i,NULL))) 1408 { 1409 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1410 goto err; 1411 } 1412 p+=i; 1413 1414 n2s(p,i); 1415 param_len+=i+2; 1416 if (param_len > n) 1417 { 1418 al=SSL_AD_DECODE_ERROR; 1419 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_G_LENGTH); 1420 goto f_err; 1421 } 1422 if (!(s->srp_ctx.g=BN_bin2bn(p,i,NULL))) 1423 { 1424 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1425 goto err; 1426 } 1427 p+=i; 1428 1429 i = (unsigned int)(p[0]); 1430 p++; 1431 param_len+=i+1; 1432 if (param_len > n) 1433 { 1434 al=SSL_AD_DECODE_ERROR; 1435 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_S_LENGTH); 1436 goto f_err; 1437 } 1438 if (!(s->srp_ctx.s=BN_bin2bn(p,i,NULL))) 1439 { 1440 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1441 goto err; 1442 } 1443 p+=i; 1444 1445 n2s(p,i); 1446 param_len+=i+2; 1447 if (param_len > n) 1448 { 1449 al=SSL_AD_DECODE_ERROR; 1450 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_B_LENGTH); 1451 goto f_err; 1452 } 1453 if (!(s->srp_ctx.B=BN_bin2bn(p,i,NULL))) 1454 { 1455 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1456 goto err; 1457 } 1458 p+=i; 1459 n-=param_len; 1460 1461/* We must check if there is a certificate */ 1462#ifndef OPENSSL_NO_RSA 1463 if (alg_a & SSL_aRSA) 1464 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1465#else 1466 if (0) 1467 ; 1468#endif 1469#ifndef OPENSSL_NO_DSA 1470 else if (alg_a & SSL_aDSS) 1471 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509); 1472#endif 1473 } 1474 else 1475#endif /* !OPENSSL_NO_SRP */ 1476#ifndef OPENSSL_NO_RSA 1477 if (alg_k & SSL_kRSA) 1478 { 1479 if ((rsa=RSA_new()) == NULL) 1480 { 1481 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1482 goto err; 1483 } 1484 n2s(p,i); 1485 param_len=i+2; 1486 if (param_len > n) 1487 { 1488 al=SSL_AD_DECODE_ERROR; 1489 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH); 1490 goto f_err; 1491 } 1492 if (!(rsa->n=BN_bin2bn(p,i,rsa->n))) 1493 { 1494 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1495 goto err; 1496 } 1497 p+=i; 1498 1499 n2s(p,i); 1500 param_len+=i+2; 1501 if (param_len > n) 1502 { 1503 al=SSL_AD_DECODE_ERROR; 1504 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH); 1505 goto f_err; 1506 } 1507 if (!(rsa->e=BN_bin2bn(p,i,rsa->e))) 1508 { 1509 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1510 goto err; 1511 } 1512 p+=i; 1513 n-=param_len; 1514 1515 /* this should be because we are using an export cipher */ 1516 if (alg_a & SSL_aRSA) 1517 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1518 else 1519 { 1520 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1521 goto err; 1522 } 1523 s->session->sess_cert->peer_rsa_tmp=rsa; 1524 rsa=NULL; 1525 } 1526#else /* OPENSSL_NO_RSA */ 1527 if (0) 1528 ; 1529#endif 1530#ifndef OPENSSL_NO_DH 1531 else if (alg_k & SSL_kEDH) 1532 { 1533 if ((dh=DH_new()) == NULL) 1534 { 1535 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB); 1536 goto err; 1537 } 1538 n2s(p,i); 1539 param_len=i+2; 1540 if (param_len > n) 1541 { 1542 al=SSL_AD_DECODE_ERROR; 1543 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH); 1544 goto f_err; 1545 } 1546 if (!(dh->p=BN_bin2bn(p,i,NULL))) 1547 { 1548 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1549 goto err; 1550 } 1551 p+=i; 1552 1553 n2s(p,i); 1554 param_len+=i+2; 1555 if (param_len > n) 1556 { 1557 al=SSL_AD_DECODE_ERROR; 1558 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH); 1559 goto f_err; 1560 } 1561 if (!(dh->g=BN_bin2bn(p,i,NULL))) 1562 { 1563 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1564 goto err; 1565 } 1566 p+=i; 1567 1568 n2s(p,i); 1569 param_len+=i+2; 1570 if (param_len > n) 1571 { 1572 al=SSL_AD_DECODE_ERROR; 1573 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH); 1574 goto f_err; 1575 } 1576 if (!(dh->pub_key=BN_bin2bn(p,i,NULL))) 1577 { 1578 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1579 goto err; 1580 } 1581 p+=i; 1582 n-=param_len; 1583 1584#ifndef OPENSSL_NO_RSA 1585 if (alg_a & SSL_aRSA) 1586 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1587#else 1588 if (0) 1589 ; 1590#endif 1591#ifndef OPENSSL_NO_DSA 1592 else if (alg_a & SSL_aDSS) 1593 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509); 1594#endif 1595 /* else anonymous DH, so no certificate or pkey. */ 1596 1597 s->session->sess_cert->peer_dh_tmp=dh; 1598 dh=NULL; 1599 } 1600 else if ((alg_k & SSL_kDHr) || (alg_k & SSL_kDHd)) 1601 { 1602 al=SSL_AD_ILLEGAL_PARAMETER; 1603 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER); 1604 goto f_err; 1605 } 1606#endif /* !OPENSSL_NO_DH */ 1607 1608#ifndef OPENSSL_NO_ECDH 1609 else if (alg_k & SSL_kEECDH) 1610 { 1611 EC_GROUP *ngroup; 1612 const EC_GROUP *group; 1613 1614 if ((ecdh=EC_KEY_new()) == NULL) 1615 { 1616 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1617 goto err; 1618 } 1619 1620 /* Extract elliptic curve parameters and the 1621 * server's ephemeral ECDH public key. 1622 * Keep accumulating lengths of various components in 1623 * param_len and make sure it never exceeds n. 1624 */ 1625 1626 /* XXX: For now we only support named (not generic) curves 1627 * and the ECParameters in this case is just three bytes. 1628 */ 1629 param_len=3; 1630 if ((param_len > n) || 1631 (*p != NAMED_CURVE_TYPE) || 1632 ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0)) 1633 { 1634 al=SSL_AD_INTERNAL_ERROR; 1635 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); 1636 goto f_err; 1637 } 1638 1639 ngroup = EC_GROUP_new_by_curve_name(curve_nid); 1640 if (ngroup == NULL) 1641 { 1642 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB); 1643 goto err; 1644 } 1645 if (EC_KEY_set_group(ecdh, ngroup) == 0) 1646 { 1647 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB); 1648 goto err; 1649 } 1650 EC_GROUP_free(ngroup); 1651 1652 group = EC_KEY_get0_group(ecdh); 1653 1654 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && 1655 (EC_GROUP_get_degree(group) > 163)) 1656 { 1657 al=SSL_AD_EXPORT_RESTRICTION; 1658 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER); 1659 goto f_err; 1660 } 1661 1662 p+=3; 1663 1664 /* Next, get the encoded ECPoint */ 1665 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) || 1666 ((bn_ctx = BN_CTX_new()) == NULL)) 1667 { 1668 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1669 goto err; 1670 } 1671 1672 encoded_pt_len = *p; /* length of encoded point */ 1673 p+=1; 1674 param_len += (1 + encoded_pt_len); 1675 if ((param_len > n) || 1676 (EC_POINT_oct2point(group, srvr_ecpoint, 1677 p, encoded_pt_len, bn_ctx) == 0)) 1678 { 1679 al=SSL_AD_DECODE_ERROR; 1680 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT); 1681 goto f_err; 1682 } 1683 1684 n-=param_len; 1685 p+=encoded_pt_len; 1686 1687 /* The ECC/TLS specification does not mention 1688 * the use of DSA to sign ECParameters in the server 1689 * key exchange message. We do support RSA and ECDSA. 1690 */ 1691 if (0) ; 1692#ifndef OPENSSL_NO_RSA 1693 else if (alg_a & SSL_aRSA) 1694 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1695#endif 1696#ifndef OPENSSL_NO_ECDSA 1697 else if (alg_a & SSL_aECDSA) 1698 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509); 1699#endif 1700 /* else anonymous ECDH, so no certificate or pkey. */ 1701 EC_KEY_set_public_key(ecdh, srvr_ecpoint); 1702 s->session->sess_cert->peer_ecdh_tmp=ecdh; 1703 ecdh=NULL; 1704 BN_CTX_free(bn_ctx); 1705 bn_ctx = NULL; 1706 EC_POINT_free(srvr_ecpoint); 1707 srvr_ecpoint = NULL; 1708 } 1709 else if (alg_k) 1710 { 1711 al=SSL_AD_UNEXPECTED_MESSAGE; 1712 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE); 1713 goto f_err; 1714 } 1715#endif /* !OPENSSL_NO_ECDH */ 1716 1717 1718 /* p points to the next byte, there are 'n' bytes left */ 1719 1720 /* if it was signed, check the signature */ 1721 if (pkey != NULL) 1722 { 1723 if (TLS1_get_version(s) >= TLS1_2_VERSION) 1724 { 1725 int sigalg = tls12_get_sigid(pkey); 1726 /* Should never happen */ 1727 if (sigalg == -1) 1728 { 1729 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1730 goto err; 1731 } 1732 /* Check key type is consistent with signature */ 1733 if (sigalg != (int)p[1]) 1734 { 1735 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_TYPE); 1736 al=SSL_AD_DECODE_ERROR; 1737 goto f_err; 1738 } 1739 md = tls12_get_hash(p[0]); 1740 if (md == NULL) 1741 { 1742 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNKNOWN_DIGEST); 1743 al=SSL_AD_DECODE_ERROR; 1744 goto f_err; 1745 } 1746#ifdef SSL_DEBUG 1747fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md)); 1748#endif 1749 p += 2; 1750 n -= 2; 1751 } 1752 else 1753 md = EVP_sha1(); 1754 1755 n2s(p,i); 1756 n-=2; 1757 j=EVP_PKEY_size(pkey); 1758 1759 if ((i != n) || (n > j) || (n <= 0)) 1760 { 1761 /* wrong packet length */ 1762 al=SSL_AD_DECODE_ERROR; 1763 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH); 1764 goto f_err; 1765 } 1766 1767#ifndef OPENSSL_NO_RSA 1768 if (pkey->type == EVP_PKEY_RSA && TLS1_get_version(s) < TLS1_2_VERSION) 1769 { 1770 int num; 1771 1772 j=0; 1773 q=md_buf; 1774 for (num=2; num > 0; num--) 1775 { 1776 EVP_MD_CTX_set_flags(&md_ctx, 1777 EVP_MD_CTX_FLAG_NON_FIPS_ALLOW); 1778 EVP_DigestInit_ex(&md_ctx,(num == 2) 1779 ?s->ctx->md5:s->ctx->sha1, NULL); 1780 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); 1781 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); 1782 EVP_DigestUpdate(&md_ctx,param,param_len); 1783 EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i); 1784 q+=i; 1785 j+=i; 1786 } 1787 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n, 1788 pkey->pkey.rsa); 1789 if (i < 0) 1790 { 1791 al=SSL_AD_DECRYPT_ERROR; 1792 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT); 1793 goto f_err; 1794 } 1795 if (i == 0) 1796 { 1797 /* bad signature */ 1798 al=SSL_AD_DECRYPT_ERROR; 1799 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE); 1800 goto f_err; 1801 } 1802 } 1803 else 1804#endif 1805 { 1806 EVP_VerifyInit_ex(&md_ctx, md, NULL); 1807 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); 1808 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); 1809 EVP_VerifyUpdate(&md_ctx,param,param_len); 1810 if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0) 1811 { 1812 /* bad signature */ 1813 al=SSL_AD_DECRYPT_ERROR; 1814 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE); 1815 goto f_err; 1816 } 1817 } 1818 } 1819 else 1820 { 1821 if (!(alg_a & SSL_aNULL) && !(alg_k & SSL_kPSK)) 1822 /* aNULL or kPSK do not need public keys */ 1823 { 1824 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1825 goto err; 1826 } 1827 /* still data left over */ 1828 if (n != 0) 1829 { 1830 al=SSL_AD_DECODE_ERROR; 1831 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE); 1832 goto f_err; 1833 } 1834 } 1835 EVP_PKEY_free(pkey); 1836 EVP_MD_CTX_cleanup(&md_ctx); 1837 return(1); 1838f_err: 1839 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1840err: 1841 EVP_PKEY_free(pkey); 1842#ifndef OPENSSL_NO_RSA 1843 if (rsa != NULL) 1844 RSA_free(rsa); 1845#endif 1846#ifndef OPENSSL_NO_DH 1847 if (dh != NULL) 1848 DH_free(dh); 1849#endif 1850#ifndef OPENSSL_NO_ECDH 1851 BN_CTX_free(bn_ctx); 1852 EC_POINT_free(srvr_ecpoint); 1853 if (ecdh != NULL) 1854 EC_KEY_free(ecdh); 1855#endif 1856 EVP_MD_CTX_cleanup(&md_ctx); 1857 return(-1); 1858 } 1859 1860int ssl3_get_certificate_request(SSL *s) 1861 { 1862 int ok,ret=0; 1863 unsigned long n,nc,l; 1864 unsigned int llen, ctype_num,i; 1865 X509_NAME *xn=NULL; 1866 const unsigned char *p,*q; 1867 unsigned char *d; 1868 STACK_OF(X509_NAME) *ca_sk=NULL; 1869 1870 n=s->method->ssl_get_message(s, 1871 SSL3_ST_CR_CERT_REQ_A, 1872 SSL3_ST_CR_CERT_REQ_B, 1873 -1, 1874 s->max_cert_list, 1875 &ok); 1876 1877 if (!ok) return((int)n); 1878 1879 s->s3->tmp.cert_req=0; 1880 1881 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE) 1882 { 1883 s->s3->tmp.reuse_message=1; 1884 /* If we get here we don't need any cached handshake records 1885 * as we wont be doing client auth. 1886 */ 1887 if (s->s3->handshake_buffer) 1888 { 1889 if (!ssl3_digest_cached_records(s)) 1890 goto err; 1891 } 1892 return(1); 1893 } 1894 1895 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST) 1896 { 1897 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 1898 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE); 1899 goto err; 1900 } 1901 1902 /* TLS does not like anon-DH with client cert */ 1903 if (s->version > SSL3_VERSION) 1904 { 1905 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) 1906 { 1907 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 1908 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER); 1909 goto err; 1910 } 1911 } 1912 1913 p=d=(unsigned char *)s->init_msg; 1914 1915 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL) 1916 { 1917 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE); 1918 goto err; 1919 } 1920 1921 /* get the certificate types */ 1922 ctype_num= *(p++); 1923 if (ctype_num > SSL3_CT_NUMBER) 1924 ctype_num=SSL3_CT_NUMBER; 1925 for (i=0; i<ctype_num; i++) 1926 s->s3->tmp.ctype[i]= p[i]; 1927 p+=ctype_num; 1928 if (TLS1_get_version(s) >= TLS1_2_VERSION) 1929 { 1930 n2s(p, llen); 1931 /* Check we have enough room for signature algorithms and 1932 * following length value. 1933 */ 1934 if ((unsigned long)(p - d + llen + 2) > n) 1935 { 1936 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1937 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_DATA_LENGTH_TOO_LONG); 1938 goto err; 1939 } 1940 if ((llen & 1) || !tls1_process_sigalgs(s, p, llen)) 1941 { 1942 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1943 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_SIGNATURE_ALGORITHMS_ERROR); 1944 goto err; 1945 } 1946 p += llen; 1947 } 1948 1949 /* get the CA RDNs */ 1950 n2s(p,llen); 1951#if 0 1952{ 1953FILE *out; 1954out=fopen("/tmp/vsign.der","w"); 1955fwrite(p,1,llen,out); 1956fclose(out); 1957} 1958#endif 1959 1960 if ((unsigned long)(p - d + llen) != n) 1961 { 1962 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1963 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH); 1964 goto err; 1965 } 1966 1967 for (nc=0; nc<llen; ) 1968 { 1969 n2s(p,l); 1970 if ((l+nc+2) > llen) 1971 { 1972 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG)) 1973 goto cont; /* netscape bugs */ 1974 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1975 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG); 1976 goto err; 1977 } 1978 1979 q=p; 1980 1981 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL) 1982 { 1983 /* If netscape tolerance is on, ignore errors */ 1984 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG) 1985 goto cont; 1986 else 1987 { 1988 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1989 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB); 1990 goto err; 1991 } 1992 } 1993 1994 if (q != (p+l)) 1995 { 1996 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1997 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH); 1998 goto err; 1999 } 2000 if (!sk_X509_NAME_push(ca_sk,xn)) 2001 { 2002 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE); 2003 goto err; 2004 } 2005 2006 p+=l; 2007 nc+=l+2; 2008 } 2009 2010 if (0) 2011 { 2012cont: 2013 ERR_clear_error(); 2014 } 2015 2016 /* we should setup a certificate to return.... */ 2017 s->s3->tmp.cert_req=1; 2018 s->s3->tmp.ctype_num=ctype_num; 2019 if (s->s3->tmp.ca_names != NULL) 2020 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free); 2021 s->s3->tmp.ca_names=ca_sk; 2022 ca_sk=NULL; 2023 2024 ret=1; 2025err: 2026 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free); 2027 return(ret); 2028 } 2029 2030static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b) 2031 { 2032 return(X509_NAME_cmp(*a,*b)); 2033 } 2034#ifndef OPENSSL_NO_TLSEXT 2035int ssl3_get_new_session_ticket(SSL *s) 2036 { 2037 int ok,al,ret=0, ticklen; 2038 long n; 2039 const unsigned char *p; 2040 unsigned char *d; 2041 2042 n=s->method->ssl_get_message(s, 2043 SSL3_ST_CR_SESSION_TICKET_A, 2044 SSL3_ST_CR_SESSION_TICKET_B, 2045 -1, 2046 16384, 2047 &ok); 2048 2049 if (!ok) 2050 return((int)n); 2051 2052 if (s->s3->tmp.message_type == SSL3_MT_FINISHED) 2053 { 2054 s->s3->tmp.reuse_message=1; 2055 return(1); 2056 } 2057 if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET) 2058 { 2059 al=SSL_AD_UNEXPECTED_MESSAGE; 2060 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_BAD_MESSAGE_TYPE); 2061 goto f_err; 2062 } 2063 if (n < 6) 2064 { 2065 /* need at least ticket_lifetime_hint + ticket length */ 2066 al = SSL_AD_DECODE_ERROR; 2067 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH); 2068 goto f_err; 2069 } 2070 2071 p=d=(unsigned char *)s->init_msg; 2072 n2l(p, s->session->tlsext_tick_lifetime_hint); 2073 n2s(p, ticklen); 2074 /* ticket_lifetime_hint + ticket_length + ticket */ 2075 if (ticklen + 6 != n) 2076 { 2077 al = SSL_AD_DECODE_ERROR; 2078 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH); 2079 goto f_err; 2080 } 2081 if (s->session->tlsext_tick) 2082 { 2083 OPENSSL_free(s->session->tlsext_tick); 2084 s->session->tlsext_ticklen = 0; 2085 } 2086 s->session->tlsext_tick = OPENSSL_malloc(ticklen); 2087 if (!s->session->tlsext_tick) 2088 { 2089 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE); 2090 goto err; 2091 } 2092 memcpy(s->session->tlsext_tick, p, ticklen); 2093 s->session->tlsext_ticklen = ticklen; 2094 /* There are two ways to detect a resumed ticket sesion. 2095 * One is to set an appropriate session ID and then the server 2096 * must return a match in ServerHello. This allows the normal 2097 * client session ID matching to work and we know much 2098 * earlier that the ticket has been accepted. 2099 * 2100 * The other way is to set zero length session ID when the 2101 * ticket is presented and rely on the handshake to determine 2102 * session resumption. 2103 * 2104 * We choose the former approach because this fits in with 2105 * assumptions elsewhere in OpenSSL. The session ID is set 2106 * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the 2107 * ticket. 2108 */ 2109 EVP_Digest(p, ticklen, 2110 s->session->session_id, &s->session->session_id_length, 2111#ifndef OPENSSL_NO_SHA256 2112 EVP_sha256(), NULL); 2113#else 2114 EVP_sha1(), NULL); 2115#endif 2116 ret=1; 2117 return(ret); 2118f_err: 2119 ssl3_send_alert(s,SSL3_AL_FATAL,al); 2120err: 2121 return(-1); 2122 } 2123 2124int ssl3_get_cert_status(SSL *s) 2125 { 2126 int ok, al; 2127 unsigned long resplen,n; 2128 const unsigned char *p; 2129 2130 n=s->method->ssl_get_message(s, 2131 SSL3_ST_CR_CERT_STATUS_A, 2132 SSL3_ST_CR_CERT_STATUS_B, 2133 SSL3_MT_CERTIFICATE_STATUS, 2134 16384, 2135 &ok); 2136 2137 if (!ok) return((int)n); 2138 if (n < 4) 2139 { 2140 /* need at least status type + length */ 2141 al = SSL_AD_DECODE_ERROR; 2142 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH); 2143 goto f_err; 2144 } 2145 p = (unsigned char *)s->init_msg; 2146 if (*p++ != TLSEXT_STATUSTYPE_ocsp) 2147 { 2148 al = SSL_AD_DECODE_ERROR; 2149 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_UNSUPPORTED_STATUS_TYPE); 2150 goto f_err; 2151 } 2152 n2l3(p, resplen); 2153 if (resplen + 4 != n) 2154 { 2155 al = SSL_AD_DECODE_ERROR; 2156 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH); 2157 goto f_err; 2158 } 2159 if (s->tlsext_ocsp_resp) 2160 OPENSSL_free(s->tlsext_ocsp_resp); 2161 s->tlsext_ocsp_resp = BUF_memdup(p, resplen); 2162 if (!s->tlsext_ocsp_resp) 2163 { 2164 al = SSL_AD_INTERNAL_ERROR; 2165 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE); 2166 goto f_err; 2167 } 2168 s->tlsext_ocsp_resplen = resplen; 2169 if (s->ctx->tlsext_status_cb) 2170 { 2171 int ret; 2172 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg); 2173 if (ret == 0) 2174 { 2175 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE; 2176 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_INVALID_STATUS_RESPONSE); 2177 goto f_err; 2178 } 2179 if (ret < 0) 2180 { 2181 al = SSL_AD_INTERNAL_ERROR; 2182 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE); 2183 goto f_err; 2184 } 2185 } 2186 return 1; 2187f_err: 2188 ssl3_send_alert(s,SSL3_AL_FATAL,al); 2189 return(-1); 2190 } 2191#endif 2192 2193int ssl3_get_server_done(SSL *s) 2194 { 2195 int ok,ret=0; 2196 long n; 2197 2198 n=s->method->ssl_get_message(s, 2199 SSL3_ST_CR_SRVR_DONE_A, 2200 SSL3_ST_CR_SRVR_DONE_B, 2201 SSL3_MT_SERVER_DONE, 2202 30, /* should be very small, like 0 :-) */ 2203 &ok); 2204 2205 if (!ok) return((int)n); 2206 if (n > 0) 2207 { 2208 /* should contain no data */ 2209 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 2210 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH); 2211 return -1; 2212 } 2213 ret=1; 2214 return(ret); 2215 } 2216 2217 2218int ssl3_send_client_key_exchange(SSL *s) 2219 { 2220 unsigned char *p,*d; 2221 int n; 2222 unsigned long alg_k; 2223#ifndef OPENSSL_NO_RSA 2224 unsigned char *q; 2225 EVP_PKEY *pkey=NULL; 2226#endif 2227#ifndef OPENSSL_NO_KRB5 2228 KSSL_ERR kssl_err; 2229#endif /* OPENSSL_NO_KRB5 */ 2230#ifndef OPENSSL_NO_ECDH 2231 EC_KEY *clnt_ecdh = NULL; 2232 const EC_POINT *srvr_ecpoint = NULL; 2233 EVP_PKEY *srvr_pub_pkey = NULL; 2234 unsigned char *encodedPoint = NULL; 2235 int encoded_pt_len = 0; 2236 BN_CTX * bn_ctx = NULL; 2237#endif 2238 2239 if (s->state == SSL3_ST_CW_KEY_EXCH_A) 2240 { 2241 d=(unsigned char *)s->init_buf->data; 2242 p= &(d[4]); 2243 2244 alg_k=s->s3->tmp.new_cipher->algorithm_mkey; 2245 2246 /* Fool emacs indentation */ 2247 if (0) {} 2248#ifndef OPENSSL_NO_RSA 2249 else if (alg_k & SSL_kRSA) 2250 { 2251 RSA *rsa; 2252 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; 2253 2254 if (s->session->sess_cert->peer_rsa_tmp != NULL) 2255 rsa=s->session->sess_cert->peer_rsa_tmp; 2256 else 2257 { 2258 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 2259 if ((pkey == NULL) || 2260 (pkey->type != EVP_PKEY_RSA) || 2261 (pkey->pkey.rsa == NULL)) 2262 { 2263 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 2264 goto err; 2265 } 2266 rsa=pkey->pkey.rsa; 2267 EVP_PKEY_free(pkey); 2268 } 2269 2270 tmp_buf[0]=s->client_version>>8; 2271 tmp_buf[1]=s->client_version&0xff; 2272 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0) 2273 goto err; 2274 2275 s->session->master_key_length=sizeof tmp_buf; 2276 2277 q=p; 2278 /* Fix buf for TLS and beyond */ 2279 if (s->version > SSL3_VERSION) 2280 p+=2; 2281 n=RSA_public_encrypt(sizeof tmp_buf, 2282 tmp_buf,p,rsa,RSA_PKCS1_PADDING); 2283#ifdef PKCS1_CHECK 2284 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++; 2285 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70; 2286#endif 2287 if (n <= 0) 2288 { 2289 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT); 2290 goto err; 2291 } 2292 2293 /* Fix buf for TLS and beyond */ 2294 if (s->version > SSL3_VERSION) 2295 { 2296 s2n(n,q); 2297 n+=2; 2298 } 2299 2300 s->session->master_key_length= 2301 s->method->ssl3_enc->generate_master_secret(s, 2302 s->session->master_key, 2303 tmp_buf,sizeof tmp_buf); 2304 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf); 2305 } 2306#endif 2307#ifndef OPENSSL_NO_KRB5 2308 else if (alg_k & SSL_kKRB5) 2309 { 2310 krb5_error_code krb5rc; 2311 KSSL_CTX *kssl_ctx = s->kssl_ctx; 2312 /* krb5_data krb5_ap_req; */ 2313 krb5_data *enc_ticket; 2314 krb5_data authenticator, *authp = NULL; 2315 EVP_CIPHER_CTX ciph_ctx; 2316 const EVP_CIPHER *enc = NULL; 2317 unsigned char iv[EVP_MAX_IV_LENGTH]; 2318 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; 2319 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH 2320 + EVP_MAX_IV_LENGTH]; 2321 int padl, outl = sizeof(epms); 2322 2323 EVP_CIPHER_CTX_init(&ciph_ctx); 2324 2325#ifdef KSSL_DEBUG 2326 printf("ssl3_send_client_key_exchange(%lx & %lx)\n", 2327 alg_k, SSL_kKRB5); 2328#endif /* KSSL_DEBUG */ 2329 2330 authp = NULL; 2331#ifdef KRB5SENDAUTH 2332 if (KRB5SENDAUTH) authp = &authenticator; 2333#endif /* KRB5SENDAUTH */ 2334 2335 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp, 2336 &kssl_err); 2337 enc = kssl_map_enc(kssl_ctx->enctype); 2338 if (enc == NULL) 2339 goto err; 2340#ifdef KSSL_DEBUG 2341 { 2342 printf("kssl_cget_tkt rtn %d\n", krb5rc); 2343 if (krb5rc && kssl_err.text) 2344 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text); 2345 } 2346#endif /* KSSL_DEBUG */ 2347 2348 if (krb5rc) 2349 { 2350 ssl3_send_alert(s,SSL3_AL_FATAL, 2351 SSL_AD_HANDSHAKE_FAILURE); 2352 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2353 kssl_err.reason); 2354 goto err; 2355 } 2356 2357 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ 2358 ** in place of RFC 2712 KerberosWrapper, as in: 2359 ** 2360 ** Send ticket (copy to *p, set n = length) 2361 ** n = krb5_ap_req.length; 2362 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length); 2363 ** if (krb5_ap_req.data) 2364 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req); 2365 ** 2366 ** Now using real RFC 2712 KerberosWrapper 2367 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>) 2368 ** Note: 2712 "opaque" types are here replaced 2369 ** with a 2-byte length followed by the value. 2370 ** Example: 2371 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms 2372 ** Where "xx xx" = length bytes. Shown here with 2373 ** optional authenticator omitted. 2374 */ 2375 2376 /* KerberosWrapper.Ticket */ 2377 s2n(enc_ticket->length,p); 2378 memcpy(p, enc_ticket->data, enc_ticket->length); 2379 p+= enc_ticket->length; 2380 n = enc_ticket->length + 2; 2381 2382 /* KerberosWrapper.Authenticator */ 2383 if (authp && authp->length) 2384 { 2385 s2n(authp->length,p); 2386 memcpy(p, authp->data, authp->length); 2387 p+= authp->length; 2388 n+= authp->length + 2; 2389 2390 free(authp->data); 2391 authp->data = NULL; 2392 authp->length = 0; 2393 } 2394 else 2395 { 2396 s2n(0,p);/* null authenticator length */ 2397 n+=2; 2398 } 2399 2400 tmp_buf[0]=s->client_version>>8; 2401 tmp_buf[1]=s->client_version&0xff; 2402 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0) 2403 goto err; 2404 2405 /* 20010420 VRS. Tried it this way; failed. 2406 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL); 2407 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx, 2408 ** kssl_ctx->length); 2409 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv); 2410 */ 2411 2412 memset(iv, 0, sizeof iv); /* per RFC 1510 */ 2413 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL, 2414 kssl_ctx->key,iv); 2415 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf, 2416 sizeof tmp_buf); 2417 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl); 2418 outl += padl; 2419 if (outl > (int)sizeof epms) 2420 { 2421 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); 2422 goto err; 2423 } 2424 EVP_CIPHER_CTX_cleanup(&ciph_ctx); 2425 2426 /* KerberosWrapper.EncryptedPreMasterSecret */ 2427 s2n(outl,p); 2428 memcpy(p, epms, outl); 2429 p+=outl; 2430 n+=outl + 2; 2431 2432 s->session->master_key_length= 2433 s->method->ssl3_enc->generate_master_secret(s, 2434 s->session->master_key, 2435 tmp_buf, sizeof tmp_buf); 2436 2437 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf); 2438 OPENSSL_cleanse(epms, outl); 2439 } 2440#endif 2441#ifndef OPENSSL_NO_DH 2442 else if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) 2443 { 2444 DH *dh_srvr,*dh_clnt; 2445 2446 if (s->session->sess_cert == NULL) 2447 { 2448 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 2449 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE); 2450 goto err; 2451 } 2452 2453 if (s->session->sess_cert->peer_dh_tmp != NULL) 2454 dh_srvr=s->session->sess_cert->peer_dh_tmp; 2455 else 2456 { 2457 /* we get them from the cert */ 2458 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); 2459 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS); 2460 goto err; 2461 } 2462 2463 /* generate a new random key */ 2464 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL) 2465 { 2466 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 2467 goto err; 2468 } 2469 if (!DH_generate_key(dh_clnt)) 2470 { 2471 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 2472 DH_free(dh_clnt); 2473 goto err; 2474 } 2475 2476 /* use the 'p' output buffer for the DH key, but 2477 * make sure to clear it out afterwards */ 2478 2479 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt); 2480 2481 if (n <= 0) 2482 { 2483 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 2484 DH_free(dh_clnt); 2485 goto err; 2486 } 2487 2488 /* generate master key from the result */ 2489 s->session->master_key_length= 2490 s->method->ssl3_enc->generate_master_secret(s, 2491 s->session->master_key,p,n); 2492 /* clean up */ 2493 memset(p,0,n); 2494 2495 /* send off the data */ 2496 n=BN_num_bytes(dh_clnt->pub_key); 2497 s2n(n,p); 2498 BN_bn2bin(dh_clnt->pub_key,p); 2499 n+=2; 2500 2501 DH_free(dh_clnt); 2502 2503 /* perhaps clean things up a bit EAY EAY EAY EAY*/ 2504 } 2505#endif 2506 2507#ifndef OPENSSL_NO_ECDH 2508 else if (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)) 2509 { 2510 const EC_GROUP *srvr_group = NULL; 2511 EC_KEY *tkey; 2512 int ecdh_clnt_cert = 0; 2513 int field_size = 0; 2514 2515 if (s->session->sess_cert == NULL) 2516 { 2517 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 2518 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE); 2519 goto err; 2520 } 2521 2522 /* Did we send out the client's 2523 * ECDH share for use in premaster 2524 * computation as part of client certificate? 2525 * If so, set ecdh_clnt_cert to 1. 2526 */ 2527 if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL)) 2528 { 2529 /* XXX: For now, we do not support client 2530 * authentication using ECDH certificates. 2531 * To add such support, one needs to add 2532 * code that checks for appropriate 2533 * conditions and sets ecdh_clnt_cert to 1. 2534 * For example, the cert have an ECC 2535 * key on the same curve as the server's 2536 * and the key should be authorized for 2537 * key agreement. 2538 * 2539 * One also needs to add code in ssl3_connect 2540 * to skip sending the certificate verify 2541 * message. 2542 * 2543 * if ((s->cert->key->privatekey != NULL) && 2544 * (s->cert->key->privatekey->type == 2545 * EVP_PKEY_EC) && ...) 2546 * ecdh_clnt_cert = 1; 2547 */ 2548 } 2549 2550 if (s->session->sess_cert->peer_ecdh_tmp != NULL) 2551 { 2552 tkey = s->session->sess_cert->peer_ecdh_tmp; 2553 } 2554 else 2555 { 2556 /* Get the Server Public Key from Cert */ 2557 srvr_pub_pkey = X509_get_pubkey(s->session-> \ 2558 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509); 2559 if ((srvr_pub_pkey == NULL) || 2560 (srvr_pub_pkey->type != EVP_PKEY_EC) || 2561 (srvr_pub_pkey->pkey.ec == NULL)) 2562 { 2563 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2564 ERR_R_INTERNAL_ERROR); 2565 goto err; 2566 } 2567 2568 tkey = srvr_pub_pkey->pkey.ec; 2569 } 2570 2571 srvr_group = EC_KEY_get0_group(tkey); 2572 srvr_ecpoint = EC_KEY_get0_public_key(tkey); 2573 2574 if ((srvr_group == NULL) || (srvr_ecpoint == NULL)) 2575 { 2576 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2577 ERR_R_INTERNAL_ERROR); 2578 goto err; 2579 } 2580 2581 if ((clnt_ecdh=EC_KEY_new()) == NULL) 2582 { 2583 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2584 goto err; 2585 } 2586 2587 if (!EC_KEY_set_group(clnt_ecdh, srvr_group)) 2588 { 2589 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB); 2590 goto err; 2591 } 2592 if (ecdh_clnt_cert) 2593 { 2594 /* Reuse key info from our certificate 2595 * We only need our private key to perform 2596 * the ECDH computation. 2597 */ 2598 const BIGNUM *priv_key; 2599 tkey = s->cert->key->privatekey->pkey.ec; 2600 priv_key = EC_KEY_get0_private_key(tkey); 2601 if (priv_key == NULL) 2602 { 2603 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2604 goto err; 2605 } 2606 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key)) 2607 { 2608 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB); 2609 goto err; 2610 } 2611 } 2612 else 2613 { 2614 /* Generate a new ECDH key pair */ 2615 if (!(EC_KEY_generate_key(clnt_ecdh))) 2616 { 2617 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB); 2618 goto err; 2619 } 2620 } 2621 2622 /* use the 'p' output buffer for the ECDH key, but 2623 * make sure to clear it out afterwards 2624 */ 2625 2626 field_size = EC_GROUP_get_degree(srvr_group); 2627 if (field_size <= 0) 2628 { 2629 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2630 ERR_R_ECDH_LIB); 2631 goto err; 2632 } 2633 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL); 2634 if (n <= 0) 2635 { 2636 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2637 ERR_R_ECDH_LIB); 2638 goto err; 2639 } 2640 2641 /* generate master key from the result */ 2642 s->session->master_key_length = s->method->ssl3_enc \ 2643 -> generate_master_secret(s, 2644 s->session->master_key, 2645 p, n); 2646 2647 memset(p, 0, n); /* clean up */ 2648 2649 if (ecdh_clnt_cert) 2650 { 2651 /* Send empty client key exch message */ 2652 n = 0; 2653 } 2654 else 2655 { 2656 /* First check the size of encoding and 2657 * allocate memory accordingly. 2658 */ 2659 encoded_pt_len = 2660 EC_POINT_point2oct(srvr_group, 2661 EC_KEY_get0_public_key(clnt_ecdh), 2662 POINT_CONVERSION_UNCOMPRESSED, 2663 NULL, 0, NULL); 2664 2665 encodedPoint = (unsigned char *) 2666 OPENSSL_malloc(encoded_pt_len * 2667 sizeof(unsigned char)); 2668 bn_ctx = BN_CTX_new(); 2669 if ((encodedPoint == NULL) || 2670 (bn_ctx == NULL)) 2671 { 2672 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2673 goto err; 2674 } 2675 2676 /* Encode the public key */ 2677 n = EC_POINT_point2oct(srvr_group, 2678 EC_KEY_get0_public_key(clnt_ecdh), 2679 POINT_CONVERSION_UNCOMPRESSED, 2680 encodedPoint, encoded_pt_len, bn_ctx); 2681 2682 *p = n; /* length of encoded point */ 2683 /* Encoded point will be copied here */ 2684 p += 1; 2685 /* copy the point */ 2686 memcpy((unsigned char *)p, encodedPoint, n); 2687 /* increment n to account for length field */ 2688 n += 1; 2689 } 2690 2691 /* Free allocated memory */ 2692 BN_CTX_free(bn_ctx); 2693 if (encodedPoint != NULL) OPENSSL_free(encodedPoint); 2694 if (clnt_ecdh != NULL) 2695 EC_KEY_free(clnt_ecdh); 2696 EVP_PKEY_free(srvr_pub_pkey); 2697 } 2698#endif /* !OPENSSL_NO_ECDH */ 2699 else if (alg_k & SSL_kGOST) 2700 { 2701 /* GOST key exchange message creation */ 2702 EVP_PKEY_CTX *pkey_ctx; 2703 X509 *peer_cert; 2704 size_t msglen; 2705 unsigned int md_len; 2706 int keytype; 2707 unsigned char premaster_secret[32],shared_ukm[32], tmp[256]; 2708 EVP_MD_CTX *ukm_hash; 2709 EVP_PKEY *pub_key; 2710 2711 /* Get server sertificate PKEY and create ctx from it */ 2712 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST01)].x509; 2713 if (!peer_cert) 2714 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST94)].x509; 2715 if (!peer_cert) { 2716 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER); 2717 goto err; 2718 } 2719 2720 pkey_ctx=EVP_PKEY_CTX_new(pub_key=X509_get_pubkey(peer_cert),NULL); 2721 /* If we have send a certificate, and certificate key 2722 2723 * parameters match those of server certificate, use 2724 * certificate key for key exchange 2725 */ 2726 2727 /* Otherwise, generate ephemeral key pair */ 2728 2729 EVP_PKEY_encrypt_init(pkey_ctx); 2730 /* Generate session key */ 2731 RAND_bytes(premaster_secret,32); 2732 /* If we have client certificate, use its secret as peer key */ 2733 if (s->s3->tmp.cert_req && s->cert->key->privatekey) { 2734 if (EVP_PKEY_derive_set_peer(pkey_ctx,s->cert->key->privatekey) <=0) { 2735 /* If there was an error - just ignore it. Ephemeral key 2736 * would be used 2737 */ 2738 ERR_clear_error(); 2739 } 2740 } 2741 /* Compute shared IV and store it in algorithm-specific 2742 * context data */ 2743 ukm_hash = EVP_MD_CTX_create(); 2744 EVP_DigestInit(ukm_hash,EVP_get_digestbynid(NID_id_GostR3411_94)); 2745 EVP_DigestUpdate(ukm_hash,s->s3->client_random,SSL3_RANDOM_SIZE); 2746 EVP_DigestUpdate(ukm_hash,s->s3->server_random,SSL3_RANDOM_SIZE); 2747 EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len); 2748 EVP_MD_CTX_destroy(ukm_hash); 2749 if (EVP_PKEY_CTX_ctrl(pkey_ctx,-1,EVP_PKEY_OP_ENCRYPT,EVP_PKEY_CTRL_SET_IV, 2750 8,shared_ukm)<0) { 2751 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2752 SSL_R_LIBRARY_BUG); 2753 goto err; 2754 } 2755 /* Make GOST keytransport blob message */ 2756 /*Encapsulate it into sequence */ 2757 *(p++)=V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED; 2758 msglen=255; 2759 if (EVP_PKEY_encrypt(pkey_ctx,tmp,&msglen,premaster_secret,32)<0) { 2760 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2761 SSL_R_LIBRARY_BUG); 2762 goto err; 2763 } 2764 if (msglen >= 0x80) 2765 { 2766 *(p++)=0x81; 2767 *(p++)= msglen & 0xff; 2768 n=msglen+3; 2769 } 2770 else 2771 { 2772 *(p++)= msglen & 0xff; 2773 n=msglen+2; 2774 } 2775 memcpy(p, tmp, msglen); 2776 /* Check if pubkey from client certificate was used */ 2777 if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0) 2778 { 2779 /* Set flag "skip certificate verify" */ 2780 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY; 2781 } 2782 EVP_PKEY_CTX_free(pkey_ctx); 2783 s->session->master_key_length= 2784 s->method->ssl3_enc->generate_master_secret(s, 2785 s->session->master_key,premaster_secret,32); 2786 EVP_PKEY_free(pub_key); 2787 2788 } 2789#ifndef OPENSSL_NO_SRP 2790 else if (alg_k & SSL_kSRP) 2791 { 2792 if (s->srp_ctx.A != NULL) 2793 { 2794 /* send off the data */ 2795 n=BN_num_bytes(s->srp_ctx.A); 2796 s2n(n,p); 2797 BN_bn2bin(s->srp_ctx.A,p); 2798 n+=2; 2799 } 2800 else 2801 { 2802 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 2803 goto err; 2804 } 2805 if (s->session->srp_username != NULL) 2806 OPENSSL_free(s->session->srp_username); 2807 s->session->srp_username = BUF_strdup(s->srp_ctx.login); 2808 if (s->session->srp_username == NULL) 2809 { 2810 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2811 ERR_R_MALLOC_FAILURE); 2812 goto err; 2813 } 2814 2815 if ((s->session->master_key_length = SRP_generate_client_master_secret(s,s->session->master_key))<0) 2816 { 2817 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 2818 goto err; 2819 } 2820 } 2821#endif 2822#ifndef OPENSSL_NO_PSK 2823 else if (alg_k & SSL_kPSK) 2824 { 2825 char identity[PSK_MAX_IDENTITY_LEN]; 2826 unsigned char *t = NULL; 2827 unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4]; 2828 unsigned int pre_ms_len = 0, psk_len = 0; 2829 int psk_err = 1; 2830 2831 n = 0; 2832 if (s->psk_client_callback == NULL) 2833 { 2834 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2835 SSL_R_PSK_NO_CLIENT_CB); 2836 goto err; 2837 } 2838 2839 psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint, 2840 identity, PSK_MAX_IDENTITY_LEN, 2841 psk_or_pre_ms, sizeof(psk_or_pre_ms)); 2842 if (psk_len > PSK_MAX_PSK_LEN) 2843 { 2844 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2845 ERR_R_INTERNAL_ERROR); 2846 goto psk_err; 2847 } 2848 else if (psk_len == 0) 2849 { 2850 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2851 SSL_R_PSK_IDENTITY_NOT_FOUND); 2852 goto psk_err; 2853 } 2854 2855 /* create PSK pre_master_secret */ 2856 pre_ms_len = 2+psk_len+2+psk_len; 2857 t = psk_or_pre_ms; 2858 memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len); 2859 s2n(psk_len, t); 2860 memset(t, 0, psk_len); 2861 t+=psk_len; 2862 s2n(psk_len, t); 2863 2864 if (s->session->psk_identity_hint != NULL) 2865 OPENSSL_free(s->session->psk_identity_hint); 2866 s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint); 2867 if (s->ctx->psk_identity_hint != NULL && 2868 s->session->psk_identity_hint == NULL) 2869 { 2870 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2871 ERR_R_MALLOC_FAILURE); 2872 goto psk_err; 2873 } 2874 2875 if (s->session->psk_identity != NULL) 2876 OPENSSL_free(s->session->psk_identity); 2877 s->session->psk_identity = BUF_strdup(identity); 2878 if (s->session->psk_identity == NULL) 2879 { 2880 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2881 ERR_R_MALLOC_FAILURE); 2882 goto psk_err; 2883 } 2884 2885 s->session->master_key_length = 2886 s->method->ssl3_enc->generate_master_secret(s, 2887 s->session->master_key, 2888 psk_or_pre_ms, pre_ms_len); 2889 n = strlen(identity); 2890 s2n(n, p); 2891 memcpy(p, identity, n); 2892 n+=2; 2893 psk_err = 0; 2894 psk_err: 2895 OPENSSL_cleanse(identity, PSK_MAX_IDENTITY_LEN); 2896 OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms)); 2897 if (psk_err != 0) 2898 { 2899 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); 2900 goto err; 2901 } 2902 } 2903#endif 2904 else 2905 { 2906 ssl3_send_alert(s, SSL3_AL_FATAL, 2907 SSL_AD_HANDSHAKE_FAILURE); 2908 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2909 ERR_R_INTERNAL_ERROR); 2910 goto err; 2911 } 2912 2913 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE; 2914 l2n3(n,d); 2915 2916 s->state=SSL3_ST_CW_KEY_EXCH_B; 2917 /* number of bytes to write */ 2918 s->init_num=n+4; 2919 s->init_off=0; 2920 } 2921 2922 /* SSL3_ST_CW_KEY_EXCH_B */ 2923 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 2924err: 2925#ifndef OPENSSL_NO_ECDH 2926 BN_CTX_free(bn_ctx); 2927 if (encodedPoint != NULL) OPENSSL_free(encodedPoint); 2928 if (clnt_ecdh != NULL) 2929 EC_KEY_free(clnt_ecdh); 2930 EVP_PKEY_free(srvr_pub_pkey); 2931#endif 2932 return(-1); 2933 } 2934 2935int ssl3_send_client_verify(SSL *s) 2936 { 2937 unsigned char *p,*d; 2938 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH]; 2939 EVP_PKEY *pkey; 2940 EVP_PKEY_CTX *pctx=NULL; 2941 EVP_MD_CTX mctx; 2942 unsigned u=0; 2943 unsigned long n; 2944 int j; 2945 2946 EVP_MD_CTX_init(&mctx); 2947 2948 if (s->state == SSL3_ST_CW_CERT_VRFY_A) 2949 { 2950 d=(unsigned char *)s->init_buf->data; 2951 p= &(d[4]); 2952 pkey=s->cert->key->privatekey; 2953/* Create context from key and test if sha1 is allowed as digest */ 2954 pctx = EVP_PKEY_CTX_new(pkey,NULL); 2955 EVP_PKEY_sign_init(pctx); 2956 if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1())>0) 2957 { 2958 if (TLS1_get_version(s) < TLS1_2_VERSION) 2959 s->method->ssl3_enc->cert_verify_mac(s, 2960 NID_sha1, 2961 &(data[MD5_DIGEST_LENGTH])); 2962 } 2963 else 2964 { 2965 ERR_clear_error(); 2966 } 2967 /* For TLS v1.2 send signature algorithm and signature 2968 * using agreed digest and cached handshake records. 2969 */ 2970 if (TLS1_get_version(s) >= TLS1_2_VERSION) 2971 { 2972 long hdatalen = 0; 2973 void *hdata; 2974 const EVP_MD *md = s->cert->key->digest; 2975 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, 2976 &hdata); 2977 if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md)) 2978 { 2979 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, 2980 ERR_R_INTERNAL_ERROR); 2981 goto err; 2982 } 2983 p += 2; 2984#ifdef SSL_DEBUG 2985 fprintf(stderr, "Using TLS 1.2 with client alg %s\n", 2986 EVP_MD_name(md)); 2987#endif 2988 if (!EVP_SignInit_ex(&mctx, md, NULL) 2989 || !EVP_SignUpdate(&mctx, hdata, hdatalen) 2990 || !EVP_SignFinal(&mctx, p + 2, &u, pkey)) 2991 { 2992 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, 2993 ERR_R_EVP_LIB); 2994 goto err; 2995 } 2996 s2n(u,p); 2997 n = u + 4; 2998 if (!ssl3_digest_cached_records(s)) 2999 goto err; 3000 } 3001 else 3002#ifndef OPENSSL_NO_RSA 3003 if (pkey->type == EVP_PKEY_RSA) 3004 { 3005 s->method->ssl3_enc->cert_verify_mac(s, 3006 NID_md5, 3007 &(data[0])); 3008 if (RSA_sign(NID_md5_sha1, data, 3009 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH, 3010 &(p[2]), &u, pkey->pkey.rsa) <= 0 ) 3011 { 3012 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB); 3013 goto err; 3014 } 3015 s2n(u,p); 3016 n=u+2; 3017 } 3018 else 3019#endif 3020#ifndef OPENSSL_NO_DSA 3021 if (pkey->type == EVP_PKEY_DSA) 3022 { 3023 if (!DSA_sign(pkey->save_type, 3024 &(data[MD5_DIGEST_LENGTH]), 3025 SHA_DIGEST_LENGTH,&(p[2]), 3026 (unsigned int *)&j,pkey->pkey.dsa)) 3027 { 3028 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB); 3029 goto err; 3030 } 3031 s2n(j,p); 3032 n=j+2; 3033 } 3034 else 3035#endif 3036#ifndef OPENSSL_NO_ECDSA 3037 if (pkey->type == EVP_PKEY_EC) 3038 { 3039 if (!ECDSA_sign(pkey->save_type, 3040 &(data[MD5_DIGEST_LENGTH]), 3041 SHA_DIGEST_LENGTH,&(p[2]), 3042 (unsigned int *)&j,pkey->pkey.ec)) 3043 { 3044 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, 3045 ERR_R_ECDSA_LIB); 3046 goto err; 3047 } 3048 s2n(j,p); 3049 n=j+2; 3050 } 3051 else 3052#endif 3053 if (pkey->type == NID_id_GostR3410_94 || pkey->type == NID_id_GostR3410_2001) 3054 { 3055 unsigned char signbuf[64]; 3056 int i; 3057 size_t sigsize=64; 3058 s->method->ssl3_enc->cert_verify_mac(s, 3059 NID_id_GostR3411_94, 3060 data); 3061 if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) { 3062 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, 3063 ERR_R_INTERNAL_ERROR); 3064 goto err; 3065 } 3066 for (i=63,j=0; i>=0; j++, i--) { 3067 p[2+j]=signbuf[i]; 3068 } 3069 s2n(j,p); 3070 n=j+2; 3071 } 3072 else 3073 { 3074 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR); 3075 goto err; 3076 } 3077 *(d++)=SSL3_MT_CERTIFICATE_VERIFY; 3078 l2n3(n,d); 3079 3080 s->state=SSL3_ST_CW_CERT_VRFY_B; 3081 s->init_num=(int)n+4; 3082 s->init_off=0; 3083 } 3084 EVP_MD_CTX_cleanup(&mctx); 3085 EVP_PKEY_CTX_free(pctx); 3086 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 3087err: 3088 EVP_MD_CTX_cleanup(&mctx); 3089 EVP_PKEY_CTX_free(pctx); 3090 return(-1); 3091 } 3092 3093int ssl3_send_client_certificate(SSL *s) 3094 { 3095 X509 *x509=NULL; 3096 EVP_PKEY *pkey=NULL; 3097 int i; 3098 unsigned long l; 3099 3100 if (s->state == SSL3_ST_CW_CERT_A) 3101 { 3102 if ((s->cert == NULL) || 3103 (s->cert->key->x509 == NULL) || 3104 (s->cert->key->privatekey == NULL)) 3105 s->state=SSL3_ST_CW_CERT_B; 3106 else 3107 s->state=SSL3_ST_CW_CERT_C; 3108 } 3109 3110 /* We need to get a client cert */ 3111 if (s->state == SSL3_ST_CW_CERT_B) 3112 { 3113 /* If we get an error, we need to 3114 * ssl->rwstate=SSL_X509_LOOKUP; return(-1); 3115 * We then get retied later */ 3116 i=0; 3117 i = ssl_do_client_cert_cb(s, &x509, &pkey); 3118 if (i < 0) 3119 { 3120 s->rwstate=SSL_X509_LOOKUP; 3121 return(-1); 3122 } 3123 s->rwstate=SSL_NOTHING; 3124 if ((i == 1) && (pkey != NULL) && (x509 != NULL)) 3125 { 3126 s->state=SSL3_ST_CW_CERT_B; 3127 if ( !SSL_use_certificate(s,x509) || 3128 !SSL_use_PrivateKey(s,pkey)) 3129 i=0; 3130 } 3131 else if (i == 1) 3132 { 3133 i=0; 3134 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); 3135 } 3136 3137 if (x509 != NULL) X509_free(x509); 3138 if (pkey != NULL) EVP_PKEY_free(pkey); 3139 if (i == 0) 3140 { 3141 if (s->version == SSL3_VERSION) 3142 { 3143 s->s3->tmp.cert_req=0; 3144 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE); 3145 return(1); 3146 } 3147 else 3148 { 3149 s->s3->tmp.cert_req=2; 3150 } 3151 } 3152 3153 /* Ok, we have a cert */ 3154 s->state=SSL3_ST_CW_CERT_C; 3155 } 3156 3157 if (s->state == SSL3_ST_CW_CERT_C) 3158 { 3159 s->state=SSL3_ST_CW_CERT_D; 3160 l=ssl3_output_cert_chain(s, 3161 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509); 3162 s->init_num=(int)l; 3163 s->init_off=0; 3164 } 3165 /* SSL3_ST_CW_CERT_D */ 3166 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 3167 } 3168 3169#define has_bits(i,m) (((i)&(m)) == (m)) 3170 3171int ssl3_check_cert_and_algorithm(SSL *s) 3172 { 3173 int i,idx; 3174 long alg_k,alg_a; 3175 EVP_PKEY *pkey=NULL; 3176 SESS_CERT *sc; 3177#ifndef OPENSSL_NO_RSA 3178 RSA *rsa; 3179#endif 3180#ifndef OPENSSL_NO_DH 3181 DH *dh; 3182#endif 3183 3184 alg_k=s->s3->tmp.new_cipher->algorithm_mkey; 3185 alg_a=s->s3->tmp.new_cipher->algorithm_auth; 3186 3187 /* we don't have a certificate */ 3188 if ((alg_a & (SSL_aDH|SSL_aNULL|SSL_aKRB5)) || (alg_k & SSL_kPSK)) 3189 return(1); 3190 3191 sc=s->session->sess_cert; 3192 if (sc == NULL) 3193 { 3194 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR); 3195 goto err; 3196 } 3197 3198#ifndef OPENSSL_NO_RSA 3199 rsa=s->session->sess_cert->peer_rsa_tmp; 3200#endif 3201#ifndef OPENSSL_NO_DH 3202 dh=s->session->sess_cert->peer_dh_tmp; 3203#endif 3204 3205 /* This is the passed certificate */ 3206 3207 idx=sc->peer_cert_type; 3208#ifndef OPENSSL_NO_ECDH 3209 if (idx == SSL_PKEY_ECC) 3210 { 3211 if (ssl_check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509, 3212 s) == 0) 3213 { /* check failed */ 3214 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT); 3215 goto f_err; 3216 } 3217 else 3218 { 3219 return 1; 3220 } 3221 } 3222#endif 3223 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509); 3224 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey); 3225 EVP_PKEY_free(pkey); 3226 3227 3228 /* Check that we have a certificate if we require one */ 3229 if ((alg_a & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN)) 3230 { 3231 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT); 3232 goto f_err; 3233 } 3234#ifndef OPENSSL_NO_DSA 3235 else if ((alg_a & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN)) 3236 { 3237 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT); 3238 goto f_err; 3239 } 3240#endif 3241#ifndef OPENSSL_NO_RSA 3242 if ((alg_k & SSL_kRSA) && 3243 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL))) 3244 { 3245 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT); 3246 goto f_err; 3247 } 3248#endif 3249#ifndef OPENSSL_NO_DH 3250 if ((alg_k & SSL_kEDH) && 3251 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL))) 3252 { 3253 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY); 3254 goto f_err; 3255 } 3256 else if ((alg_k & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA)) 3257 { 3258 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT); 3259 goto f_err; 3260 } 3261#ifndef OPENSSL_NO_DSA 3262 else if ((alg_k & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA)) 3263 { 3264 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT); 3265 goto f_err; 3266 } 3267#endif 3268#endif 3269 3270 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP)) 3271 { 3272#ifndef OPENSSL_NO_RSA 3273 if (alg_k & SSL_kRSA) 3274 { 3275 if (rsa == NULL 3276 || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) 3277 { 3278 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY); 3279 goto f_err; 3280 } 3281 } 3282 else 3283#endif 3284#ifndef OPENSSL_NO_DH 3285 if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) 3286 { 3287 if (dh == NULL 3288 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) 3289 { 3290 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY); 3291 goto f_err; 3292 } 3293 } 3294 else 3295#endif 3296 { 3297 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE); 3298 goto f_err; 3299 } 3300 } 3301 return(1); 3302f_err: 3303 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); 3304err: 3305 return(0); 3306 } 3307 3308#if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG) 3309int ssl3_send_next_proto(SSL *s) 3310 { 3311 unsigned int len, padding_len; 3312 unsigned char *d; 3313 3314 if (s->state == SSL3_ST_CW_NEXT_PROTO_A) 3315 { 3316 len = s->next_proto_negotiated_len; 3317 padding_len = 32 - ((len + 2) % 32); 3318 d = (unsigned char *)s->init_buf->data; 3319 d[4] = len; 3320 memcpy(d + 5, s->next_proto_negotiated, len); 3321 d[5 + len] = padding_len; 3322 memset(d + 6 + len, 0, padding_len); 3323 *(d++)=SSL3_MT_NEXT_PROTO; 3324 l2n3(2 + len + padding_len, d); 3325 s->state = SSL3_ST_CW_NEXT_PROTO_B; 3326 s->init_num = 4 + 2 + len + padding_len; 3327 s->init_off = 0; 3328 } 3329 3330 return ssl3_do_write(s, SSL3_RT_HANDSHAKE); 3331} 3332#endif /* !OPENSSL_NO_TLSEXT && !OPENSSL_NO_NEXTPROTONEG */ 3333 3334/* Check to see if handshake is full or resumed. Usually this is just a 3335 * case of checking to see if a cache hit has occurred. In the case of 3336 * session tickets we have to check the next message to be sure. 3337 */ 3338 3339#ifndef OPENSSL_NO_TLSEXT 3340int ssl3_check_finished(SSL *s) 3341 { 3342 int ok; 3343 long n; 3344 /* If we have no ticket it cannot be a resumed session. */ 3345 if (!s->session->tlsext_tick) 3346 return 1; 3347 /* this function is called when we really expect a Certificate 3348 * message, so permit appropriate message length */ 3349 n=s->method->ssl_get_message(s, 3350 SSL3_ST_CR_CERT_A, 3351 SSL3_ST_CR_CERT_B, 3352 -1, 3353 s->max_cert_list, 3354 &ok); 3355 if (!ok) return((int)n); 3356 s->s3->tmp.reuse_message = 1; 3357 if ((s->s3->tmp.message_type == SSL3_MT_FINISHED) 3358 || (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET)) 3359 return 2; 3360 3361 return 1; 3362 } 3363#endif 3364 3365int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey) 3366 { 3367 int i = 0; 3368#ifndef OPENSSL_NO_ENGINE 3369 if (s->ctx->client_cert_engine) 3370 { 3371 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s, 3372 SSL_get_client_CA_list(s), 3373 px509, ppkey, NULL, NULL, NULL); 3374 if (i != 0) 3375 return i; 3376 } 3377#endif 3378 if (s->ctx->client_cert_cb) 3379 i = s->ctx->client_cert_cb(s,px509,ppkey); 3380 return i; 3381 } 3382