s3_clnt.c revision 267104
1/* ssl/s3_clnt.c */ 2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay@cryptsoft.com). 7 * The implementation was written so as to conform with Netscapes SSL. 8 * 9 * This library is free for commercial and non-commercial use as long as 10 * the following conditions are aheared to. The following conditions 11 * apply to all code found in this distribution, be it the RC4, RSA, 12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13 * included with this distribution is covered by the same copyright terms 14 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15 * 16 * Copyright remains Eric Young's, and as such any Copyright notices in 17 * the code are not to be removed. 18 * If this package is used in a product, Eric Young should be given attribution 19 * as the author of the parts of the library used. 20 * This can be in the form of a textual message at program startup or 21 * in documentation (online or textual) provided with the package. 22 * 23 * Redistribution and use in source and binary forms, with or without 24 * modification, are permitted provided that the following conditions 25 * are met: 26 * 1. Redistributions of source code must retain the copyright 27 * notice, this list of conditions and the following disclaimer. 28 * 2. Redistributions in binary form must reproduce the above copyright 29 * notice, this list of conditions and the following disclaimer in the 30 * documentation and/or other materials provided with the distribution. 31 * 3. All advertising materials mentioning features or use of this software 32 * must display the following acknowledgement: 33 * "This product includes cryptographic software written by 34 * Eric Young (eay@cryptsoft.com)" 35 * The word 'cryptographic' can be left out if the rouines from the library 36 * being used are not cryptographic related :-). 37 * 4. If you include any Windows specific code (or a derivative thereof) from 38 * the apps directory (application code) you must include an acknowledgement: 39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40 * 41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51 * SUCH DAMAGE. 52 * 53 * The licence and distribution terms for any publically available version or 54 * derivative of this code cannot be changed. i.e. this code cannot simply be 55 * copied and put under another distribution licence 56 * [including the GNU Public Licence.] 57 */ 58/* ==================================================================== 59 * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved. 60 * 61 * Redistribution and use in source and binary forms, with or without 62 * modification, are permitted provided that the following conditions 63 * are met: 64 * 65 * 1. Redistributions of source code must retain the above copyright 66 * notice, this list of conditions and the following disclaimer. 67 * 68 * 2. Redistributions in binary form must reproduce the above copyright 69 * notice, this list of conditions and the following disclaimer in 70 * the documentation and/or other materials provided with the 71 * distribution. 72 * 73 * 3. All advertising materials mentioning features or use of this 74 * software must display the following acknowledgment: 75 * "This product includes software developed by the OpenSSL Project 76 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" 77 * 78 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 79 * endorse or promote products derived from this software without 80 * prior written permission. For written permission, please contact 81 * openssl-core@openssl.org. 82 * 83 * 5. Products derived from this software may not be called "OpenSSL" 84 * nor may "OpenSSL" appear in their names without prior written 85 * permission of the OpenSSL Project. 86 * 87 * 6. Redistributions of any form whatsoever must retain the following 88 * acknowledgment: 89 * "This product includes software developed by the OpenSSL Project 90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)" 91 * 92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 103 * OF THE POSSIBILITY OF SUCH DAMAGE. 104 * ==================================================================== 105 * 106 * This product includes cryptographic software written by Eric Young 107 * (eay@cryptsoft.com). This product includes software written by Tim 108 * Hudson (tjh@cryptsoft.com). 109 * 110 */ 111/* ==================================================================== 112 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. 113 * 114 * Portions of the attached software ("Contribution") are developed by 115 * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project. 116 * 117 * The Contribution is licensed pursuant to the OpenSSL open source 118 * license provided above. 119 * 120 * ECC cipher suite support in OpenSSL originally written by 121 * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories. 122 * 123 */ 124/* ==================================================================== 125 * Copyright 2005 Nokia. All rights reserved. 126 * 127 * The portions of the attached software ("Contribution") is developed by 128 * Nokia Corporation and is licensed pursuant to the OpenSSL open source 129 * license. 130 * 131 * The Contribution, originally written by Mika Kousa and Pasi Eronen of 132 * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites 133 * support (see RFC 4279) to OpenSSL. 134 * 135 * No patent licenses or other rights except those expressly stated in 136 * the OpenSSL open source license shall be deemed granted or received 137 * expressly, by implication, estoppel, or otherwise. 138 * 139 * No assurances are provided by Nokia that the Contribution does not 140 * infringe the patent or other intellectual property rights of any third 141 * party or that the license provides you with all the necessary rights 142 * to make use of the Contribution. 143 * 144 * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN 145 * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA 146 * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY 147 * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR 148 * OTHERWISE. 149 */ 150 151#include <stdio.h> 152#include "ssl_locl.h" 153#include "kssl_lcl.h" 154#include <openssl/buffer.h> 155#include <openssl/rand.h> 156#include <openssl/objects.h> 157#include <openssl/evp.h> 158#include <openssl/md5.h> 159#ifdef OPENSSL_FIPS 160#include <openssl/fips.h> 161#endif 162#ifndef OPENSSL_NO_DH 163#include <openssl/dh.h> 164#endif 165#include <openssl/bn.h> 166#ifndef OPENSSL_NO_ENGINE 167#include <openssl/engine.h> 168#endif 169 170static const SSL_METHOD *ssl3_get_client_method(int ver); 171static int ca_dn_cmp(const X509_NAME * const *a,const X509_NAME * const *b); 172 173static const SSL_METHOD *ssl3_get_client_method(int ver) 174 { 175 if (ver == SSL3_VERSION) 176 return(SSLv3_client_method()); 177 else 178 return(NULL); 179 } 180 181IMPLEMENT_ssl3_meth_func(SSLv3_client_method, 182 ssl_undefined_function, 183 ssl3_connect, 184 ssl3_get_client_method) 185 186int ssl3_connect(SSL *s) 187 { 188 BUF_MEM *buf=NULL; 189 unsigned long Time=(unsigned long)time(NULL); 190 void (*cb)(const SSL *ssl,int type,int val)=NULL; 191 int ret= -1; 192 int new_state,state,skip=0; 193 194 RAND_add(&Time,sizeof(Time),0); 195 ERR_clear_error(); 196 clear_sys_error(); 197 198 if (s->info_callback != NULL) 199 cb=s->info_callback; 200 else if (s->ctx->info_callback != NULL) 201 cb=s->ctx->info_callback; 202 203 s->in_handshake++; 204 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); 205 206#ifndef OPENSSL_NO_HEARTBEATS 207 /* If we're awaiting a HeartbeatResponse, pretend we 208 * already got and don't await it anymore, because 209 * Heartbeats don't make sense during handshakes anyway. 210 */ 211 if (s->tlsext_hb_pending) 212 { 213 s->tlsext_hb_pending = 0; 214 s->tlsext_hb_seq++; 215 } 216#endif 217 218 for (;;) 219 { 220 state=s->state; 221 222 switch(s->state) 223 { 224 case SSL_ST_RENEGOTIATE: 225 s->renegotiate=1; 226 s->state=SSL_ST_CONNECT; 227 s->ctx->stats.sess_connect_renegotiate++; 228 /* break */ 229 case SSL_ST_BEFORE: 230 case SSL_ST_CONNECT: 231 case SSL_ST_BEFORE|SSL_ST_CONNECT: 232 case SSL_ST_OK|SSL_ST_CONNECT: 233 234 s->server=0; 235 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1); 236 237 if ((s->version & 0xff00 ) != 0x0300) 238 { 239 SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR); 240 ret = -1; 241 goto end; 242 } 243 244 /* s->version=SSL3_VERSION; */ 245 s->type=SSL_ST_CONNECT; 246 247 if (s->init_buf == NULL) 248 { 249 if ((buf=BUF_MEM_new()) == NULL) 250 { 251 ret= -1; 252 goto end; 253 } 254 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH)) 255 { 256 ret= -1; 257 goto end; 258 } 259 s->init_buf=buf; 260 buf=NULL; 261 } 262 263 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; } 264 265 /* setup buffing BIO */ 266 if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; } 267 268 /* don't push the buffering BIO quite yet */ 269 270 ssl3_init_finished_mac(s); 271 272 s->state=SSL3_ST_CW_CLNT_HELLO_A; 273 s->ctx->stats.sess_connect++; 274 s->init_num=0; 275 break; 276 277 case SSL3_ST_CW_CLNT_HELLO_A: 278 case SSL3_ST_CW_CLNT_HELLO_B: 279 280 s->shutdown=0; 281 ret=ssl3_client_hello(s); 282 if (ret <= 0) goto end; 283 s->state=SSL3_ST_CR_SRVR_HELLO_A; 284 s->init_num=0; 285 286 /* turn on buffering for the next lot of output */ 287 if (s->bbio != s->wbio) 288 s->wbio=BIO_push(s->bbio,s->wbio); 289 290 break; 291 292 case SSL3_ST_CR_SRVR_HELLO_A: 293 case SSL3_ST_CR_SRVR_HELLO_B: 294 ret=ssl3_get_server_hello(s); 295 if (ret <= 0) goto end; 296 297 if (s->hit) 298 { 299 s->state=SSL3_ST_CR_FINISHED_A; 300#ifndef OPENSSL_NO_TLSEXT 301 if (s->tlsext_ticket_expected) 302 { 303 /* receive renewed session ticket */ 304 s->state=SSL3_ST_CR_SESSION_TICKET_A; 305 } 306#endif 307 } 308 else 309 s->state=SSL3_ST_CR_CERT_A; 310 s->init_num=0; 311 break; 312 313 case SSL3_ST_CR_CERT_A: 314 case SSL3_ST_CR_CERT_B: 315#ifndef OPENSSL_NO_TLSEXT 316 ret=ssl3_check_finished(s); 317 if (ret <= 0) goto end; 318 if (ret == 2) 319 { 320 s->hit = 1; 321 if (s->tlsext_ticket_expected) 322 s->state=SSL3_ST_CR_SESSION_TICKET_A; 323 else 324 s->state=SSL3_ST_CR_FINISHED_A; 325 s->init_num=0; 326 break; 327 } 328#endif 329 /* Check if it is anon DH/ECDH */ 330 /* or PSK */ 331 if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) && 332 !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) 333 { 334 ret=ssl3_get_server_certificate(s); 335 if (ret <= 0) goto end; 336#ifndef OPENSSL_NO_TLSEXT 337 if (s->tlsext_status_expected) 338 s->state=SSL3_ST_CR_CERT_STATUS_A; 339 else 340 s->state=SSL3_ST_CR_KEY_EXCH_A; 341 } 342 else 343 { 344 skip = 1; 345 s->state=SSL3_ST_CR_KEY_EXCH_A; 346 } 347#else 348 } 349 else 350 skip=1; 351 352 s->state=SSL3_ST_CR_KEY_EXCH_A; 353#endif 354 s->init_num=0; 355 break; 356 357 case SSL3_ST_CR_KEY_EXCH_A: 358 case SSL3_ST_CR_KEY_EXCH_B: 359 ret=ssl3_get_key_exchange(s); 360 if (ret <= 0) goto end; 361 s->state=SSL3_ST_CR_CERT_REQ_A; 362 s->init_num=0; 363 364 /* at this point we check that we have the 365 * required stuff from the server */ 366 if (!ssl3_check_cert_and_algorithm(s)) 367 { 368 ret= -1; 369 goto end; 370 } 371 break; 372 373 case SSL3_ST_CR_CERT_REQ_A: 374 case SSL3_ST_CR_CERT_REQ_B: 375 ret=ssl3_get_certificate_request(s); 376 if (ret <= 0) goto end; 377 s->state=SSL3_ST_CR_SRVR_DONE_A; 378 s->init_num=0; 379 break; 380 381 case SSL3_ST_CR_SRVR_DONE_A: 382 case SSL3_ST_CR_SRVR_DONE_B: 383 ret=ssl3_get_server_done(s); 384 if (ret <= 0) goto end; 385#ifndef OPENSSL_NO_SRP 386 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) 387 { 388 if ((ret = SRP_Calc_A_param(s))<=0) 389 { 390 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_SRP_A_CALC); 391 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR); 392 goto end; 393 } 394 } 395#endif 396 if (s->s3->tmp.cert_req) 397 s->state=SSL3_ST_CW_CERT_A; 398 else 399 s->state=SSL3_ST_CW_KEY_EXCH_A; 400 s->init_num=0; 401 402 break; 403 404 case SSL3_ST_CW_CERT_A: 405 case SSL3_ST_CW_CERT_B: 406 case SSL3_ST_CW_CERT_C: 407 case SSL3_ST_CW_CERT_D: 408 ret=ssl3_send_client_certificate(s); 409 if (ret <= 0) goto end; 410 s->state=SSL3_ST_CW_KEY_EXCH_A; 411 s->init_num=0; 412 break; 413 414 case SSL3_ST_CW_KEY_EXCH_A: 415 case SSL3_ST_CW_KEY_EXCH_B: 416 ret=ssl3_send_client_key_exchange(s); 417 if (ret <= 0) goto end; 418 /* EAY EAY EAY need to check for DH fix cert 419 * sent back */ 420 /* For TLS, cert_req is set to 2, so a cert chain 421 * of nothing is sent, but no verify packet is sent */ 422 /* XXX: For now, we do not support client 423 * authentication in ECDH cipher suites with 424 * ECDH (rather than ECDSA) certificates. 425 * We need to skip the certificate verify 426 * message when client's ECDH public key is sent 427 * inside the client certificate. 428 */ 429 if (s->s3->tmp.cert_req == 1) 430 { 431 s->state=SSL3_ST_CW_CERT_VRFY_A; 432 } 433 else 434 { 435 s->state=SSL3_ST_CW_CHANGE_A; 436 s->s3->change_cipher_spec=0; 437 } 438 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) 439 { 440 s->state=SSL3_ST_CW_CHANGE_A; 441 s->s3->change_cipher_spec=0; 442 } 443 444 s->init_num=0; 445 break; 446 447 case SSL3_ST_CW_CERT_VRFY_A: 448 case SSL3_ST_CW_CERT_VRFY_B: 449 ret=ssl3_send_client_verify(s); 450 if (ret <= 0) goto end; 451 s->state=SSL3_ST_CW_CHANGE_A; 452 s->init_num=0; 453 s->s3->change_cipher_spec=0; 454 break; 455 456 case SSL3_ST_CW_CHANGE_A: 457 case SSL3_ST_CW_CHANGE_B: 458 ret=ssl3_send_change_cipher_spec(s, 459 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B); 460 if (ret <= 0) goto end; 461 462#if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG) 463 s->state=SSL3_ST_CW_FINISHED_A; 464#else 465 if (s->s3->next_proto_neg_seen) 466 s->state=SSL3_ST_CW_NEXT_PROTO_A; 467 else 468 s->state=SSL3_ST_CW_FINISHED_A; 469#endif 470 s->init_num=0; 471 472 s->session->cipher=s->s3->tmp.new_cipher; 473#ifdef OPENSSL_NO_COMP 474 s->session->compress_meth=0; 475#else 476 if (s->s3->tmp.new_compression == NULL) 477 s->session->compress_meth=0; 478 else 479 s->session->compress_meth= 480 s->s3->tmp.new_compression->id; 481#endif 482 if (!s->method->ssl3_enc->setup_key_block(s)) 483 { 484 ret= -1; 485 goto end; 486 } 487 488 if (!s->method->ssl3_enc->change_cipher_state(s, 489 SSL3_CHANGE_CIPHER_CLIENT_WRITE)) 490 { 491 ret= -1; 492 goto end; 493 } 494 495 break; 496 497#if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG) 498 case SSL3_ST_CW_NEXT_PROTO_A: 499 case SSL3_ST_CW_NEXT_PROTO_B: 500 ret=ssl3_send_next_proto(s); 501 if (ret <= 0) goto end; 502 s->state=SSL3_ST_CW_FINISHED_A; 503 break; 504#endif 505 506 case SSL3_ST_CW_FINISHED_A: 507 case SSL3_ST_CW_FINISHED_B: 508 ret=ssl3_send_finished(s, 509 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B, 510 s->method->ssl3_enc->client_finished_label, 511 s->method->ssl3_enc->client_finished_label_len); 512 if (ret <= 0) goto end; 513 s->state=SSL3_ST_CW_FLUSH; 514 515 /* clear flags */ 516 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER; 517 if (s->hit) 518 { 519 s->s3->tmp.next_state=SSL_ST_OK; 520 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED) 521 { 522 s->state=SSL_ST_OK; 523 s->s3->flags|=SSL3_FLAGS_POP_BUFFER; 524 s->s3->delay_buf_pop_ret=0; 525 } 526 } 527 else 528 { 529#ifndef OPENSSL_NO_TLSEXT 530 /* Allow NewSessionTicket if ticket expected */ 531 if (s->tlsext_ticket_expected) 532 s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A; 533 else 534#endif 535 536 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A; 537 } 538 s->init_num=0; 539 break; 540 541#ifndef OPENSSL_NO_TLSEXT 542 case SSL3_ST_CR_SESSION_TICKET_A: 543 case SSL3_ST_CR_SESSION_TICKET_B: 544 ret=ssl3_get_new_session_ticket(s); 545 if (ret <= 0) goto end; 546 s->state=SSL3_ST_CR_FINISHED_A; 547 s->init_num=0; 548 break; 549 550 case SSL3_ST_CR_CERT_STATUS_A: 551 case SSL3_ST_CR_CERT_STATUS_B: 552 ret=ssl3_get_cert_status(s); 553 if (ret <= 0) goto end; 554 s->state=SSL3_ST_CR_KEY_EXCH_A; 555 s->init_num=0; 556 break; 557#endif 558 559 case SSL3_ST_CR_FINISHED_A: 560 case SSL3_ST_CR_FINISHED_B: 561 562 s->s3->flags |= SSL3_FLAGS_CCS_OK; 563 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A, 564 SSL3_ST_CR_FINISHED_B); 565 if (ret <= 0) goto end; 566 567 if (s->hit) 568 s->state=SSL3_ST_CW_CHANGE_A; 569 else 570 s->state=SSL_ST_OK; 571 s->init_num=0; 572 break; 573 574 case SSL3_ST_CW_FLUSH: 575 s->rwstate=SSL_WRITING; 576 if (BIO_flush(s->wbio) <= 0) 577 { 578 ret= -1; 579 goto end; 580 } 581 s->rwstate=SSL_NOTHING; 582 s->state=s->s3->tmp.next_state; 583 break; 584 585 case SSL_ST_OK: 586 /* clean a few things up */ 587 ssl3_cleanup_key_block(s); 588 589 if (s->init_buf != NULL) 590 { 591 BUF_MEM_free(s->init_buf); 592 s->init_buf=NULL; 593 } 594 595 /* If we are not 'joining' the last two packets, 596 * remove the buffering now */ 597 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER)) 598 ssl_free_wbio_buffer(s); 599 /* else do it later in ssl3_write */ 600 601 s->init_num=0; 602 s->renegotiate=0; 603 s->new_session=0; 604 605 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT); 606 if (s->hit) s->ctx->stats.sess_hit++; 607 608 ret=1; 609 /* s->server=0; */ 610 s->handshake_func=ssl3_connect; 611 s->ctx->stats.sess_connect_good++; 612 613 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1); 614 615 goto end; 616 /* break; */ 617 618 default: 619 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE); 620 ret= -1; 621 goto end; 622 /* break; */ 623 } 624 625 /* did we do anything */ 626 if (!s->s3->tmp.reuse_message && !skip) 627 { 628 if (s->debug) 629 { 630 if ((ret=BIO_flush(s->wbio)) <= 0) 631 goto end; 632 } 633 634 if ((cb != NULL) && (s->state != state)) 635 { 636 new_state=s->state; 637 s->state=state; 638 cb(s,SSL_CB_CONNECT_LOOP,1); 639 s->state=new_state; 640 } 641 } 642 skip=0; 643 } 644end: 645 s->in_handshake--; 646 if (buf != NULL) 647 BUF_MEM_free(buf); 648 if (cb != NULL) 649 cb(s,SSL_CB_CONNECT_EXIT,ret); 650 return(ret); 651 } 652 653 654int ssl3_client_hello(SSL *s) 655 { 656 unsigned char *buf; 657 unsigned char *p,*d; 658 int i; 659 unsigned long Time,l; 660#ifndef OPENSSL_NO_COMP 661 int j; 662 SSL_COMP *comp; 663#endif 664 665 buf=(unsigned char *)s->init_buf->data; 666 if (s->state == SSL3_ST_CW_CLNT_HELLO_A) 667 { 668 SSL_SESSION *sess = s->session; 669 if ((sess == NULL) || 670 (sess->ssl_version != s->version) || 671#ifdef OPENSSL_NO_TLSEXT 672 !sess->session_id_length || 673#else 674 (!sess->session_id_length && !sess->tlsext_tick) || 675#endif 676 (sess->not_resumable)) 677 { 678 if (!ssl_get_new_session(s,0)) 679 goto err; 680 } 681 /* else use the pre-loaded session */ 682 683 p=s->s3->client_random; 684 Time=(unsigned long)time(NULL); /* Time */ 685 l2n(Time,p); 686 if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0) 687 goto err; 688 689 /* Do the message type and length last */ 690 d=p= &(buf[4]); 691 692 /* version indicates the negotiated version: for example from 693 * an SSLv2/v3 compatible client hello). The client_version 694 * field is the maximum version we permit and it is also 695 * used in RSA encrypted premaster secrets. Some servers can 696 * choke if we initially report a higher version then 697 * renegotiate to a lower one in the premaster secret. This 698 * didn't happen with TLS 1.0 as most servers supported it 699 * but it can with TLS 1.1 or later if the server only supports 700 * 1.0. 701 * 702 * Possible scenario with previous logic: 703 * 1. Client hello indicates TLS 1.2 704 * 2. Server hello says TLS 1.0 705 * 3. RSA encrypted premaster secret uses 1.2. 706 * 4. Handhaked proceeds using TLS 1.0. 707 * 5. Server sends hello request to renegotiate. 708 * 6. Client hello indicates TLS v1.0 as we now 709 * know that is maximum server supports. 710 * 7. Server chokes on RSA encrypted premaster secret 711 * containing version 1.0. 712 * 713 * For interoperability it should be OK to always use the 714 * maximum version we support in client hello and then rely 715 * on the checking of version to ensure the servers isn't 716 * being inconsistent: for example initially negotiating with 717 * TLS 1.0 and renegotiating with TLS 1.2. We do this by using 718 * client_version in client hello and not resetting it to 719 * the negotiated version. 720 */ 721#if 0 722 *(p++)=s->version>>8; 723 *(p++)=s->version&0xff; 724 s->client_version=s->version; 725#else 726 *(p++)=s->client_version>>8; 727 *(p++)=s->client_version&0xff; 728#endif 729 730 /* Random stuff */ 731 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE); 732 p+=SSL3_RANDOM_SIZE; 733 734 /* Session ID */ 735 if (s->new_session) 736 i=0; 737 else 738 i=s->session->session_id_length; 739 *(p++)=i; 740 if (i != 0) 741 { 742 if (i > (int)sizeof(s->session->session_id)) 743 { 744 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); 745 goto err; 746 } 747 memcpy(p,s->session->session_id,i); 748 p+=i; 749 } 750 751 /* Ciphers supported */ 752 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0); 753 if (i == 0) 754 { 755 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE); 756 goto err; 757 } 758#ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH 759 /* Some servers hang if client hello > 256 bytes 760 * as hack workaround chop number of supported ciphers 761 * to keep it well below this if we use TLS v1.2 762 */ 763 if (TLS1_get_version(s) >= TLS1_2_VERSION 764 && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH) 765 i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1; 766#endif 767 s2n(i,p); 768 p+=i; 769 770 /* COMPRESSION */ 771#ifdef OPENSSL_NO_COMP 772 *(p++)=1; 773#else 774 775 if ((s->options & SSL_OP_NO_COMPRESSION) 776 || !s->ctx->comp_methods) 777 j=0; 778 else 779 j=sk_SSL_COMP_num(s->ctx->comp_methods); 780 *(p++)=1+j; 781 for (i=0; i<j; i++) 782 { 783 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i); 784 *(p++)=comp->id; 785 } 786#endif 787 *(p++)=0; /* Add the NULL method */ 788 789#ifndef OPENSSL_NO_TLSEXT 790 /* TLS extensions*/ 791 if (ssl_prepare_clienthello_tlsext(s) <= 0) 792 { 793 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT); 794 goto err; 795 } 796 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL) 797 { 798 SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR); 799 goto err; 800 } 801#endif 802 803 l=(p-d); 804 d=buf; 805 *(d++)=SSL3_MT_CLIENT_HELLO; 806 l2n3(l,d); 807 808 s->state=SSL3_ST_CW_CLNT_HELLO_B; 809 /* number of bytes to write */ 810 s->init_num=p-buf; 811 s->init_off=0; 812 } 813 814 /* SSL3_ST_CW_CLNT_HELLO_B */ 815 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 816err: 817 return(-1); 818 } 819 820int ssl3_get_server_hello(SSL *s) 821 { 822 STACK_OF(SSL_CIPHER) *sk; 823 const SSL_CIPHER *c; 824 unsigned char *p,*d; 825 int i,al,ok; 826 unsigned int j; 827 long n; 828#ifndef OPENSSL_NO_COMP 829 SSL_COMP *comp; 830#endif 831 832 n=s->method->ssl_get_message(s, 833 SSL3_ST_CR_SRVR_HELLO_A, 834 SSL3_ST_CR_SRVR_HELLO_B, 835 -1, 836 20000, /* ?? */ 837 &ok); 838 839 if (!ok) return((int)n); 840 841 if ( SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER) 842 { 843 if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST) 844 { 845 if ( s->d1->send_cookie == 0) 846 { 847 s->s3->tmp.reuse_message = 1; 848 return 1; 849 } 850 else /* already sent a cookie */ 851 { 852 al=SSL_AD_UNEXPECTED_MESSAGE; 853 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE); 854 goto f_err; 855 } 856 } 857 } 858 859 if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO) 860 { 861 al=SSL_AD_UNEXPECTED_MESSAGE; 862 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE); 863 goto f_err; 864 } 865 866 d=p=(unsigned char *)s->init_msg; 867 868 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff))) 869 { 870 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION); 871 s->version=(s->version&0xff00)|p[1]; 872 al=SSL_AD_PROTOCOL_VERSION; 873 goto f_err; 874 } 875 p+=2; 876 877 /* load the server hello data */ 878 /* load the server random */ 879 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE); 880 p+=SSL3_RANDOM_SIZE; 881 882 /* get the session-id */ 883 j= *(p++); 884 885 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE)) 886 { 887 al=SSL_AD_ILLEGAL_PARAMETER; 888 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG); 889 goto f_err; 890 } 891 892#ifndef OPENSSL_NO_TLSEXT 893 /* check if we want to resume the session based on external pre-shared secret */ 894 if (s->version >= TLS1_VERSION && s->tls_session_secret_cb) 895 { 896 SSL_CIPHER *pref_cipher=NULL; 897 s->session->master_key_length=sizeof(s->session->master_key); 898 if (s->tls_session_secret_cb(s, s->session->master_key, 899 &s->session->master_key_length, 900 NULL, &pref_cipher, 901 s->tls_session_secret_cb_arg)) 902 { 903 s->session->cipher = pref_cipher ? 904 pref_cipher : ssl_get_cipher_by_char(s, p+j); 905 } 906 } 907#endif /* OPENSSL_NO_TLSEXT */ 908 909 if (j != 0 && j == s->session->session_id_length 910 && memcmp(p,s->session->session_id,j) == 0) 911 { 912 if(s->sid_ctx_length != s->session->sid_ctx_length 913 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length)) 914 { 915 /* actually a client application bug */ 916 al=SSL_AD_ILLEGAL_PARAMETER; 917 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); 918 goto f_err; 919 } 920 s->s3->flags |= SSL3_FLAGS_CCS_OK; 921 s->hit=1; 922 } 923 else /* a miss or crap from the other end */ 924 { 925 /* If we were trying for session-id reuse, make a new 926 * SSL_SESSION so we don't stuff up other people */ 927 s->hit=0; 928 if (s->session->session_id_length > 0) 929 { 930 if (!ssl_get_new_session(s,0)) 931 { 932 al=SSL_AD_INTERNAL_ERROR; 933 goto f_err; 934 } 935 } 936 s->session->session_id_length=j; 937 memcpy(s->session->session_id,p,j); /* j could be 0 */ 938 } 939 p+=j; 940 c=ssl_get_cipher_by_char(s,p); 941 if (c == NULL) 942 { 943 /* unknown cipher */ 944 al=SSL_AD_ILLEGAL_PARAMETER; 945 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED); 946 goto f_err; 947 } 948 /* TLS v1.2 only ciphersuites require v1.2 or later */ 949 if ((c->algorithm_ssl & SSL_TLSV1_2) && 950 (TLS1_get_version(s) < TLS1_2_VERSION)) 951 { 952 al=SSL_AD_ILLEGAL_PARAMETER; 953 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED); 954 goto f_err; 955 } 956 p+=ssl_put_cipher_by_char(s,NULL,NULL); 957 958 sk=ssl_get_ciphers_by_id(s); 959 i=sk_SSL_CIPHER_find(sk,c); 960 if (i < 0) 961 { 962 /* we did not say we would use this cipher */ 963 al=SSL_AD_ILLEGAL_PARAMETER; 964 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED); 965 goto f_err; 966 } 967 968 /* Depending on the session caching (internal/external), the cipher 969 and/or cipher_id values may not be set. Make sure that 970 cipher_id is set and use it for comparison. */ 971 if (s->session->cipher) 972 s->session->cipher_id = s->session->cipher->id; 973 if (s->hit && (s->session->cipher_id != c->id)) 974 { 975/* Workaround is now obsolete */ 976#if 0 977 if (!(s->options & 978 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG)) 979#endif 980 { 981 al=SSL_AD_ILLEGAL_PARAMETER; 982 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); 983 goto f_err; 984 } 985 } 986 s->s3->tmp.new_cipher=c; 987 /* Don't digest cached records if TLS v1.2: we may need them for 988 * client authentication. 989 */ 990 if (TLS1_get_version(s) < TLS1_2_VERSION && !ssl3_digest_cached_records(s)) 991 { 992 al = SSL_AD_INTERNAL_ERROR; 993 goto f_err; 994 } 995 /* lets get the compression algorithm */ 996 /* COMPRESSION */ 997#ifdef OPENSSL_NO_COMP 998 if (*(p++) != 0) 999 { 1000 al=SSL_AD_ILLEGAL_PARAMETER; 1001 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); 1002 goto f_err; 1003 } 1004 /* If compression is disabled we'd better not try to resume a session 1005 * using compression. 1006 */ 1007 if (s->session->compress_meth != 0) 1008 { 1009 al=SSL_AD_INTERNAL_ERROR; 1010 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_INCONSISTENT_COMPRESSION); 1011 goto f_err; 1012 } 1013#else 1014 j= *(p++); 1015 if (s->hit && j != s->session->compress_meth) 1016 { 1017 al=SSL_AD_ILLEGAL_PARAMETER; 1018 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED); 1019 goto f_err; 1020 } 1021 if (j == 0) 1022 comp=NULL; 1023 else if (s->options & SSL_OP_NO_COMPRESSION) 1024 { 1025 al=SSL_AD_ILLEGAL_PARAMETER; 1026 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_COMPRESSION_DISABLED); 1027 goto f_err; 1028 } 1029 else 1030 comp=ssl3_comp_find(s->ctx->comp_methods,j); 1031 1032 if ((j != 0) && (comp == NULL)) 1033 { 1034 al=SSL_AD_ILLEGAL_PARAMETER; 1035 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); 1036 goto f_err; 1037 } 1038 else 1039 { 1040 s->s3->tmp.new_compression=comp; 1041 } 1042#endif 1043 1044#ifndef OPENSSL_NO_TLSEXT 1045 /* TLS extensions*/ 1046 if (s->version >= SSL3_VERSION) 1047 { 1048 if (!ssl_parse_serverhello_tlsext(s,&p,d,n, &al)) 1049 { 1050 /* 'al' set by ssl_parse_serverhello_tlsext */ 1051 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT); 1052 goto f_err; 1053 } 1054 if (ssl_check_serverhello_tlsext(s) <= 0) 1055 { 1056 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SERVERHELLO_TLSEXT); 1057 goto err; 1058 } 1059 } 1060#endif 1061 1062 if (p != (d+n)) 1063 { 1064 /* wrong packet length */ 1065 al=SSL_AD_DECODE_ERROR; 1066 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH); 1067 goto f_err; 1068 } 1069 1070 return(1); 1071f_err: 1072 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1073err: 1074 return(-1); 1075 } 1076 1077int ssl3_get_server_certificate(SSL *s) 1078 { 1079 int al,i,ok,ret= -1; 1080 unsigned long n,nc,llen,l; 1081 X509 *x=NULL; 1082 const unsigned char *q,*p; 1083 unsigned char *d; 1084 STACK_OF(X509) *sk=NULL; 1085 SESS_CERT *sc; 1086 EVP_PKEY *pkey=NULL; 1087 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */ 1088 1089 n=s->method->ssl_get_message(s, 1090 SSL3_ST_CR_CERT_A, 1091 SSL3_ST_CR_CERT_B, 1092 -1, 1093 s->max_cert_list, 1094 &ok); 1095 1096 if (!ok) return((int)n); 1097 1098 if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) || 1099 ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) && 1100 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE))) 1101 { 1102 s->s3->tmp.reuse_message=1; 1103 return(1); 1104 } 1105 1106 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE) 1107 { 1108 al=SSL_AD_UNEXPECTED_MESSAGE; 1109 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE); 1110 goto f_err; 1111 } 1112 p=d=(unsigned char *)s->init_msg; 1113 1114 if ((sk=sk_X509_new_null()) == NULL) 1115 { 1116 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE); 1117 goto err; 1118 } 1119 1120 n2l3(p,llen); 1121 if (llen+3 != n) 1122 { 1123 al=SSL_AD_DECODE_ERROR; 1124 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH); 1125 goto f_err; 1126 } 1127 for (nc=0; nc<llen; ) 1128 { 1129 n2l3(p,l); 1130 if ((l+nc+3) > llen) 1131 { 1132 al=SSL_AD_DECODE_ERROR; 1133 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); 1134 goto f_err; 1135 } 1136 1137 q=p; 1138 x=d2i_X509(NULL,&q,l); 1139 if (x == NULL) 1140 { 1141 al=SSL_AD_BAD_CERTIFICATE; 1142 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB); 1143 goto f_err; 1144 } 1145 if (q != (p+l)) 1146 { 1147 al=SSL_AD_DECODE_ERROR; 1148 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); 1149 goto f_err; 1150 } 1151 if (!sk_X509_push(sk,x)) 1152 { 1153 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE); 1154 goto err; 1155 } 1156 x=NULL; 1157 nc+=l+3; 1158 p=q; 1159 } 1160 1161 i=ssl_verify_cert_chain(s,sk); 1162 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0) 1163#ifndef OPENSSL_NO_KRB5 1164 && !((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) && 1165 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5)) 1166#endif /* OPENSSL_NO_KRB5 */ 1167 ) 1168 { 1169 al=ssl_verify_alarm_type(s->verify_result); 1170 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED); 1171 goto f_err; 1172 } 1173 ERR_clear_error(); /* but we keep s->verify_result */ 1174 1175 sc=ssl_sess_cert_new(); 1176 if (sc == NULL) goto err; 1177 1178 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert); 1179 s->session->sess_cert=sc; 1180 1181 sc->cert_chain=sk; 1182 /* Inconsistency alert: cert_chain does include the peer's 1183 * certificate, which we don't include in s3_srvr.c */ 1184 x=sk_X509_value(sk,0); 1185 sk=NULL; 1186 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/ 1187 1188 pkey=X509_get_pubkey(x); 1189 1190 /* VRS: allow null cert if auth == KRB5 */ 1191 need_cert = ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) && 1192 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5)) 1193 ? 0 : 1; 1194 1195#ifdef KSSL_DEBUG 1196 printf("pkey,x = %p, %p\n", pkey,x); 1197 printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey)); 1198 printf("cipher, alg, nc = %s, %lx, %lx, %d\n", s->s3->tmp.new_cipher->name, 1199 s->s3->tmp.new_cipher->algorithm_mkey, s->s3->tmp.new_cipher->algorithm_auth, need_cert); 1200#endif /* KSSL_DEBUG */ 1201 1202 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey))) 1203 { 1204 x=NULL; 1205 al=SSL3_AL_FATAL; 1206 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 1207 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); 1208 goto f_err; 1209 } 1210 1211 i=ssl_cert_type(x,pkey); 1212 if (need_cert && i < 0) 1213 { 1214 x=NULL; 1215 al=SSL3_AL_FATAL; 1216 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 1217 SSL_R_UNKNOWN_CERTIFICATE_TYPE); 1218 goto f_err; 1219 } 1220 1221 if (need_cert) 1222 { 1223 sc->peer_cert_type=i; 1224 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509); 1225 /* Why would the following ever happen? 1226 * We just created sc a couple of lines ago. */ 1227 if (sc->peer_pkeys[i].x509 != NULL) 1228 X509_free(sc->peer_pkeys[i].x509); 1229 sc->peer_pkeys[i].x509=x; 1230 sc->peer_key= &(sc->peer_pkeys[i]); 1231 1232 if (s->session->peer != NULL) 1233 X509_free(s->session->peer); 1234 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509); 1235 s->session->peer=x; 1236 } 1237 else 1238 { 1239 sc->peer_cert_type=i; 1240 sc->peer_key= NULL; 1241 1242 if (s->session->peer != NULL) 1243 X509_free(s->session->peer); 1244 s->session->peer=NULL; 1245 } 1246 s->session->verify_result = s->verify_result; 1247 1248 x=NULL; 1249 ret=1; 1250 1251 if (0) 1252 { 1253f_err: 1254 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1255 } 1256err: 1257 EVP_PKEY_free(pkey); 1258 X509_free(x); 1259 sk_X509_pop_free(sk,X509_free); 1260 return(ret); 1261 } 1262 1263int ssl3_get_key_exchange(SSL *s) 1264 { 1265#ifndef OPENSSL_NO_RSA 1266 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2]; 1267#endif 1268 EVP_MD_CTX md_ctx; 1269 unsigned char *param,*p; 1270 int al,i,j,param_len,ok; 1271 long n,alg_k,alg_a; 1272 EVP_PKEY *pkey=NULL; 1273 const EVP_MD *md = NULL; 1274#ifndef OPENSSL_NO_RSA 1275 RSA *rsa=NULL; 1276#endif 1277#ifndef OPENSSL_NO_DH 1278 DH *dh=NULL; 1279#endif 1280#ifndef OPENSSL_NO_ECDH 1281 EC_KEY *ecdh = NULL; 1282 BN_CTX *bn_ctx = NULL; 1283 EC_POINT *srvr_ecpoint = NULL; 1284 int curve_nid = 0; 1285 int encoded_pt_len = 0; 1286#endif 1287 1288 /* use same message size as in ssl3_get_certificate_request() 1289 * as ServerKeyExchange message may be skipped */ 1290 n=s->method->ssl_get_message(s, 1291 SSL3_ST_CR_KEY_EXCH_A, 1292 SSL3_ST_CR_KEY_EXCH_B, 1293 -1, 1294 s->max_cert_list, 1295 &ok); 1296 if (!ok) return((int)n); 1297 1298 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE) 1299 { 1300#ifndef OPENSSL_NO_PSK 1301 /* In plain PSK ciphersuite, ServerKeyExchange can be 1302 omitted if no identity hint is sent. Set 1303 session->sess_cert anyway to avoid problems 1304 later.*/ 1305 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK) 1306 { 1307 s->session->sess_cert=ssl_sess_cert_new(); 1308 if (s->ctx->psk_identity_hint) 1309 OPENSSL_free(s->ctx->psk_identity_hint); 1310 s->ctx->psk_identity_hint = NULL; 1311 } 1312#endif 1313 s->s3->tmp.reuse_message=1; 1314 return(1); 1315 } 1316 1317 param=p=(unsigned char *)s->init_msg; 1318 if (s->session->sess_cert != NULL) 1319 { 1320#ifndef OPENSSL_NO_RSA 1321 if (s->session->sess_cert->peer_rsa_tmp != NULL) 1322 { 1323 RSA_free(s->session->sess_cert->peer_rsa_tmp); 1324 s->session->sess_cert->peer_rsa_tmp=NULL; 1325 } 1326#endif 1327#ifndef OPENSSL_NO_DH 1328 if (s->session->sess_cert->peer_dh_tmp) 1329 { 1330 DH_free(s->session->sess_cert->peer_dh_tmp); 1331 s->session->sess_cert->peer_dh_tmp=NULL; 1332 } 1333#endif 1334#ifndef OPENSSL_NO_ECDH 1335 if (s->session->sess_cert->peer_ecdh_tmp) 1336 { 1337 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp); 1338 s->session->sess_cert->peer_ecdh_tmp=NULL; 1339 } 1340#endif 1341 } 1342 else 1343 { 1344 s->session->sess_cert=ssl_sess_cert_new(); 1345 } 1346 1347 param_len=0; 1348 alg_k=s->s3->tmp.new_cipher->algorithm_mkey; 1349 alg_a=s->s3->tmp.new_cipher->algorithm_auth; 1350 EVP_MD_CTX_init(&md_ctx); 1351 1352#ifndef OPENSSL_NO_PSK 1353 if (alg_k & SSL_kPSK) 1354 { 1355 char tmp_id_hint[PSK_MAX_IDENTITY_LEN+1]; 1356 1357 al=SSL_AD_HANDSHAKE_FAILURE; 1358 n2s(p,i); 1359 param_len=i+2; 1360 /* Store PSK identity hint for later use, hint is used 1361 * in ssl3_send_client_key_exchange. Assume that the 1362 * maximum length of a PSK identity hint can be as 1363 * long as the maximum length of a PSK identity. */ 1364 if (i > PSK_MAX_IDENTITY_LEN) 1365 { 1366 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1367 SSL_R_DATA_LENGTH_TOO_LONG); 1368 goto f_err; 1369 } 1370 if (param_len > n) 1371 { 1372 al=SSL_AD_DECODE_ERROR; 1373 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1374 SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH); 1375 goto f_err; 1376 } 1377 /* If received PSK identity hint contains NULL 1378 * characters, the hint is truncated from the first 1379 * NULL. p may not be ending with NULL, so create a 1380 * NULL-terminated string. */ 1381 memcpy(tmp_id_hint, p, i); 1382 memset(tmp_id_hint+i, 0, PSK_MAX_IDENTITY_LEN+1-i); 1383 if (s->ctx->psk_identity_hint != NULL) 1384 OPENSSL_free(s->ctx->psk_identity_hint); 1385 s->ctx->psk_identity_hint = BUF_strdup(tmp_id_hint); 1386 if (s->ctx->psk_identity_hint == NULL) 1387 { 1388 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); 1389 goto f_err; 1390 } 1391 1392 p+=i; 1393 n-=param_len; 1394 } 1395 else 1396#endif /* !OPENSSL_NO_PSK */ 1397#ifndef OPENSSL_NO_SRP 1398 if (alg_k & SSL_kSRP) 1399 { 1400 n2s(p,i); 1401 param_len=i+2; 1402 if (param_len > n) 1403 { 1404 al=SSL_AD_DECODE_ERROR; 1405 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_N_LENGTH); 1406 goto f_err; 1407 } 1408 if (!(s->srp_ctx.N=BN_bin2bn(p,i,NULL))) 1409 { 1410 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1411 goto err; 1412 } 1413 p+=i; 1414 1415 n2s(p,i); 1416 param_len+=i+2; 1417 if (param_len > n) 1418 { 1419 al=SSL_AD_DECODE_ERROR; 1420 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_G_LENGTH); 1421 goto f_err; 1422 } 1423 if (!(s->srp_ctx.g=BN_bin2bn(p,i,NULL))) 1424 { 1425 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1426 goto err; 1427 } 1428 p+=i; 1429 1430 i = (unsigned int)(p[0]); 1431 p++; 1432 param_len+=i+1; 1433 if (param_len > n) 1434 { 1435 al=SSL_AD_DECODE_ERROR; 1436 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_S_LENGTH); 1437 goto f_err; 1438 } 1439 if (!(s->srp_ctx.s=BN_bin2bn(p,i,NULL))) 1440 { 1441 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1442 goto err; 1443 } 1444 p+=i; 1445 1446 n2s(p,i); 1447 param_len+=i+2; 1448 if (param_len > n) 1449 { 1450 al=SSL_AD_DECODE_ERROR; 1451 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_B_LENGTH); 1452 goto f_err; 1453 } 1454 if (!(s->srp_ctx.B=BN_bin2bn(p,i,NULL))) 1455 { 1456 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1457 goto err; 1458 } 1459 p+=i; 1460 n-=param_len; 1461 1462/* We must check if there is a certificate */ 1463#ifndef OPENSSL_NO_RSA 1464 if (alg_a & SSL_aRSA) 1465 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1466#else 1467 if (0) 1468 ; 1469#endif 1470#ifndef OPENSSL_NO_DSA 1471 else if (alg_a & SSL_aDSS) 1472 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509); 1473#endif 1474 } 1475 else 1476#endif /* !OPENSSL_NO_SRP */ 1477#ifndef OPENSSL_NO_RSA 1478 if (alg_k & SSL_kRSA) 1479 { 1480 if ((rsa=RSA_new()) == NULL) 1481 { 1482 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1483 goto err; 1484 } 1485 n2s(p,i); 1486 param_len=i+2; 1487 if (param_len > n) 1488 { 1489 al=SSL_AD_DECODE_ERROR; 1490 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH); 1491 goto f_err; 1492 } 1493 if (!(rsa->n=BN_bin2bn(p,i,rsa->n))) 1494 { 1495 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1496 goto err; 1497 } 1498 p+=i; 1499 1500 n2s(p,i); 1501 param_len+=i+2; 1502 if (param_len > n) 1503 { 1504 al=SSL_AD_DECODE_ERROR; 1505 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH); 1506 goto f_err; 1507 } 1508 if (!(rsa->e=BN_bin2bn(p,i,rsa->e))) 1509 { 1510 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1511 goto err; 1512 } 1513 p+=i; 1514 n-=param_len; 1515 1516 /* this should be because we are using an export cipher */ 1517 if (alg_a & SSL_aRSA) 1518 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1519 else 1520 { 1521 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1522 goto err; 1523 } 1524 s->session->sess_cert->peer_rsa_tmp=rsa; 1525 rsa=NULL; 1526 } 1527#else /* OPENSSL_NO_RSA */ 1528 if (0) 1529 ; 1530#endif 1531#ifndef OPENSSL_NO_DH 1532 else if (alg_k & SSL_kEDH) 1533 { 1534 if ((dh=DH_new()) == NULL) 1535 { 1536 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB); 1537 goto err; 1538 } 1539 n2s(p,i); 1540 param_len=i+2; 1541 if (param_len > n) 1542 { 1543 al=SSL_AD_DECODE_ERROR; 1544 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH); 1545 goto f_err; 1546 } 1547 if (!(dh->p=BN_bin2bn(p,i,NULL))) 1548 { 1549 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1550 goto err; 1551 } 1552 p+=i; 1553 1554 n2s(p,i); 1555 param_len+=i+2; 1556 if (param_len > n) 1557 { 1558 al=SSL_AD_DECODE_ERROR; 1559 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH); 1560 goto f_err; 1561 } 1562 if (!(dh->g=BN_bin2bn(p,i,NULL))) 1563 { 1564 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1565 goto err; 1566 } 1567 p+=i; 1568 1569 n2s(p,i); 1570 param_len+=i+2; 1571 if (param_len > n) 1572 { 1573 al=SSL_AD_DECODE_ERROR; 1574 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH); 1575 goto f_err; 1576 } 1577 if (!(dh->pub_key=BN_bin2bn(p,i,NULL))) 1578 { 1579 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1580 goto err; 1581 } 1582 p+=i; 1583 n-=param_len; 1584 1585#ifndef OPENSSL_NO_RSA 1586 if (alg_a & SSL_aRSA) 1587 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1588#else 1589 if (0) 1590 ; 1591#endif 1592#ifndef OPENSSL_NO_DSA 1593 else if (alg_a & SSL_aDSS) 1594 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509); 1595#endif 1596 /* else anonymous DH, so no certificate or pkey. */ 1597 1598 s->session->sess_cert->peer_dh_tmp=dh; 1599 dh=NULL; 1600 } 1601 else if ((alg_k & SSL_kDHr) || (alg_k & SSL_kDHd)) 1602 { 1603 al=SSL_AD_ILLEGAL_PARAMETER; 1604 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER); 1605 goto f_err; 1606 } 1607#endif /* !OPENSSL_NO_DH */ 1608 1609#ifndef OPENSSL_NO_ECDH 1610 else if (alg_k & SSL_kEECDH) 1611 { 1612 EC_GROUP *ngroup; 1613 const EC_GROUP *group; 1614 1615 if ((ecdh=EC_KEY_new()) == NULL) 1616 { 1617 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1618 goto err; 1619 } 1620 1621 /* Extract elliptic curve parameters and the 1622 * server's ephemeral ECDH public key. 1623 * Keep accumulating lengths of various components in 1624 * param_len and make sure it never exceeds n. 1625 */ 1626 1627 /* XXX: For now we only support named (not generic) curves 1628 * and the ECParameters in this case is just three bytes. 1629 */ 1630 param_len=3; 1631 if ((param_len > n) || 1632 (*p != NAMED_CURVE_TYPE) || 1633 ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0)) 1634 { 1635 al=SSL_AD_INTERNAL_ERROR; 1636 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); 1637 goto f_err; 1638 } 1639 1640 ngroup = EC_GROUP_new_by_curve_name(curve_nid); 1641 if (ngroup == NULL) 1642 { 1643 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB); 1644 goto err; 1645 } 1646 if (EC_KEY_set_group(ecdh, ngroup) == 0) 1647 { 1648 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB); 1649 goto err; 1650 } 1651 EC_GROUP_free(ngroup); 1652 1653 group = EC_KEY_get0_group(ecdh); 1654 1655 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && 1656 (EC_GROUP_get_degree(group) > 163)) 1657 { 1658 al=SSL_AD_EXPORT_RESTRICTION; 1659 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER); 1660 goto f_err; 1661 } 1662 1663 p+=3; 1664 1665 /* Next, get the encoded ECPoint */ 1666 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) || 1667 ((bn_ctx = BN_CTX_new()) == NULL)) 1668 { 1669 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1670 goto err; 1671 } 1672 1673 encoded_pt_len = *p; /* length of encoded point */ 1674 p+=1; 1675 param_len += (1 + encoded_pt_len); 1676 if ((param_len > n) || 1677 (EC_POINT_oct2point(group, srvr_ecpoint, 1678 p, encoded_pt_len, bn_ctx) == 0)) 1679 { 1680 al=SSL_AD_DECODE_ERROR; 1681 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT); 1682 goto f_err; 1683 } 1684 1685 n-=param_len; 1686 p+=encoded_pt_len; 1687 1688 /* The ECC/TLS specification does not mention 1689 * the use of DSA to sign ECParameters in the server 1690 * key exchange message. We do support RSA and ECDSA. 1691 */ 1692 if (0) ; 1693#ifndef OPENSSL_NO_RSA 1694 else if (alg_a & SSL_aRSA) 1695 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1696#endif 1697#ifndef OPENSSL_NO_ECDSA 1698 else if (alg_a & SSL_aECDSA) 1699 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509); 1700#endif 1701 /* else anonymous ECDH, so no certificate or pkey. */ 1702 EC_KEY_set_public_key(ecdh, srvr_ecpoint); 1703 s->session->sess_cert->peer_ecdh_tmp=ecdh; 1704 ecdh=NULL; 1705 BN_CTX_free(bn_ctx); 1706 bn_ctx = NULL; 1707 EC_POINT_free(srvr_ecpoint); 1708 srvr_ecpoint = NULL; 1709 } 1710 else if (alg_k) 1711 { 1712 al=SSL_AD_UNEXPECTED_MESSAGE; 1713 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE); 1714 goto f_err; 1715 } 1716#endif /* !OPENSSL_NO_ECDH */ 1717 1718 1719 /* p points to the next byte, there are 'n' bytes left */ 1720 1721 /* if it was signed, check the signature */ 1722 if (pkey != NULL) 1723 { 1724 if (TLS1_get_version(s) >= TLS1_2_VERSION) 1725 { 1726 int sigalg = tls12_get_sigid(pkey); 1727 /* Should never happen */ 1728 if (sigalg == -1) 1729 { 1730 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1731 goto err; 1732 } 1733 /* Check key type is consistent with signature */ 1734 if (sigalg != (int)p[1]) 1735 { 1736 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_TYPE); 1737 al=SSL_AD_DECODE_ERROR; 1738 goto f_err; 1739 } 1740 md = tls12_get_hash(p[0]); 1741 if (md == NULL) 1742 { 1743 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNKNOWN_DIGEST); 1744 al=SSL_AD_DECODE_ERROR; 1745 goto f_err; 1746 } 1747#ifdef SSL_DEBUG 1748fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md)); 1749#endif 1750 p += 2; 1751 n -= 2; 1752 } 1753 else 1754 md = EVP_sha1(); 1755 1756 n2s(p,i); 1757 n-=2; 1758 j=EVP_PKEY_size(pkey); 1759 1760 if ((i != n) || (n > j) || (n <= 0)) 1761 { 1762 /* wrong packet length */ 1763 al=SSL_AD_DECODE_ERROR; 1764 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH); 1765 goto f_err; 1766 } 1767 1768#ifndef OPENSSL_NO_RSA 1769 if (pkey->type == EVP_PKEY_RSA && TLS1_get_version(s) < TLS1_2_VERSION) 1770 { 1771 int num; 1772 1773 j=0; 1774 q=md_buf; 1775 for (num=2; num > 0; num--) 1776 { 1777 EVP_MD_CTX_set_flags(&md_ctx, 1778 EVP_MD_CTX_FLAG_NON_FIPS_ALLOW); 1779 EVP_DigestInit_ex(&md_ctx,(num == 2) 1780 ?s->ctx->md5:s->ctx->sha1, NULL); 1781 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); 1782 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); 1783 EVP_DigestUpdate(&md_ctx,param,param_len); 1784 EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i); 1785 q+=i; 1786 j+=i; 1787 } 1788 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n, 1789 pkey->pkey.rsa); 1790 if (i < 0) 1791 { 1792 al=SSL_AD_DECRYPT_ERROR; 1793 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT); 1794 goto f_err; 1795 } 1796 if (i == 0) 1797 { 1798 /* bad signature */ 1799 al=SSL_AD_DECRYPT_ERROR; 1800 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE); 1801 goto f_err; 1802 } 1803 } 1804 else 1805#endif 1806 { 1807 EVP_VerifyInit_ex(&md_ctx, md, NULL); 1808 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); 1809 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); 1810 EVP_VerifyUpdate(&md_ctx,param,param_len); 1811 if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0) 1812 { 1813 /* bad signature */ 1814 al=SSL_AD_DECRYPT_ERROR; 1815 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE); 1816 goto f_err; 1817 } 1818 } 1819 } 1820 else 1821 { 1822 if (!(alg_a & SSL_aNULL) && !(alg_k & SSL_kPSK)) 1823 /* aNULL or kPSK do not need public keys */ 1824 { 1825 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1826 goto err; 1827 } 1828 /* still data left over */ 1829 if (n != 0) 1830 { 1831 al=SSL_AD_DECODE_ERROR; 1832 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE); 1833 goto f_err; 1834 } 1835 } 1836 EVP_PKEY_free(pkey); 1837 EVP_MD_CTX_cleanup(&md_ctx); 1838 return(1); 1839f_err: 1840 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1841err: 1842 EVP_PKEY_free(pkey); 1843#ifndef OPENSSL_NO_RSA 1844 if (rsa != NULL) 1845 RSA_free(rsa); 1846#endif 1847#ifndef OPENSSL_NO_DH 1848 if (dh != NULL) 1849 DH_free(dh); 1850#endif 1851#ifndef OPENSSL_NO_ECDH 1852 BN_CTX_free(bn_ctx); 1853 EC_POINT_free(srvr_ecpoint); 1854 if (ecdh != NULL) 1855 EC_KEY_free(ecdh); 1856#endif 1857 EVP_MD_CTX_cleanup(&md_ctx); 1858 return(-1); 1859 } 1860 1861int ssl3_get_certificate_request(SSL *s) 1862 { 1863 int ok,ret=0; 1864 unsigned long n,nc,l; 1865 unsigned int llen, ctype_num,i; 1866 X509_NAME *xn=NULL; 1867 const unsigned char *p,*q; 1868 unsigned char *d; 1869 STACK_OF(X509_NAME) *ca_sk=NULL; 1870 1871 n=s->method->ssl_get_message(s, 1872 SSL3_ST_CR_CERT_REQ_A, 1873 SSL3_ST_CR_CERT_REQ_B, 1874 -1, 1875 s->max_cert_list, 1876 &ok); 1877 1878 if (!ok) return((int)n); 1879 1880 s->s3->tmp.cert_req=0; 1881 1882 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE) 1883 { 1884 s->s3->tmp.reuse_message=1; 1885 /* If we get here we don't need any cached handshake records 1886 * as we wont be doing client auth. 1887 */ 1888 if (s->s3->handshake_buffer) 1889 { 1890 if (!ssl3_digest_cached_records(s)) 1891 goto err; 1892 } 1893 return(1); 1894 } 1895 1896 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST) 1897 { 1898 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 1899 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE); 1900 goto err; 1901 } 1902 1903 /* TLS does not like anon-DH with client cert */ 1904 if (s->version > SSL3_VERSION) 1905 { 1906 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) 1907 { 1908 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 1909 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER); 1910 goto err; 1911 } 1912 } 1913 1914 p=d=(unsigned char *)s->init_msg; 1915 1916 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL) 1917 { 1918 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE); 1919 goto err; 1920 } 1921 1922 /* get the certificate types */ 1923 ctype_num= *(p++); 1924 if (ctype_num > SSL3_CT_NUMBER) 1925 ctype_num=SSL3_CT_NUMBER; 1926 for (i=0; i<ctype_num; i++) 1927 s->s3->tmp.ctype[i]= p[i]; 1928 p+=ctype_num; 1929 if (TLS1_get_version(s) >= TLS1_2_VERSION) 1930 { 1931 n2s(p, llen); 1932 /* Check we have enough room for signature algorithms and 1933 * following length value. 1934 */ 1935 if ((unsigned long)(p - d + llen + 2) > n) 1936 { 1937 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1938 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_DATA_LENGTH_TOO_LONG); 1939 goto err; 1940 } 1941 if ((llen & 1) || !tls1_process_sigalgs(s, p, llen)) 1942 { 1943 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1944 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_SIGNATURE_ALGORITHMS_ERROR); 1945 goto err; 1946 } 1947 p += llen; 1948 } 1949 1950 /* get the CA RDNs */ 1951 n2s(p,llen); 1952#if 0 1953{ 1954FILE *out; 1955out=fopen("/tmp/vsign.der","w"); 1956fwrite(p,1,llen,out); 1957fclose(out); 1958} 1959#endif 1960 1961 if ((unsigned long)(p - d + llen) != n) 1962 { 1963 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1964 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH); 1965 goto err; 1966 } 1967 1968 for (nc=0; nc<llen; ) 1969 { 1970 n2s(p,l); 1971 if ((l+nc+2) > llen) 1972 { 1973 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG)) 1974 goto cont; /* netscape bugs */ 1975 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1976 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG); 1977 goto err; 1978 } 1979 1980 q=p; 1981 1982 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL) 1983 { 1984 /* If netscape tolerance is on, ignore errors */ 1985 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG) 1986 goto cont; 1987 else 1988 { 1989 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1990 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB); 1991 goto err; 1992 } 1993 } 1994 1995 if (q != (p+l)) 1996 { 1997 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1998 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH); 1999 goto err; 2000 } 2001 if (!sk_X509_NAME_push(ca_sk,xn)) 2002 { 2003 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE); 2004 goto err; 2005 } 2006 2007 p+=l; 2008 nc+=l+2; 2009 } 2010 2011 if (0) 2012 { 2013cont: 2014 ERR_clear_error(); 2015 } 2016 2017 /* we should setup a certificate to return.... */ 2018 s->s3->tmp.cert_req=1; 2019 s->s3->tmp.ctype_num=ctype_num; 2020 if (s->s3->tmp.ca_names != NULL) 2021 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free); 2022 s->s3->tmp.ca_names=ca_sk; 2023 ca_sk=NULL; 2024 2025 ret=1; 2026err: 2027 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free); 2028 return(ret); 2029 } 2030 2031static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b) 2032 { 2033 return(X509_NAME_cmp(*a,*b)); 2034 } 2035#ifndef OPENSSL_NO_TLSEXT 2036int ssl3_get_new_session_ticket(SSL *s) 2037 { 2038 int ok,al,ret=0, ticklen; 2039 long n; 2040 const unsigned char *p; 2041 unsigned char *d; 2042 2043 n=s->method->ssl_get_message(s, 2044 SSL3_ST_CR_SESSION_TICKET_A, 2045 SSL3_ST_CR_SESSION_TICKET_B, 2046 -1, 2047 16384, 2048 &ok); 2049 2050 if (!ok) 2051 return((int)n); 2052 2053 if (s->s3->tmp.message_type == SSL3_MT_FINISHED) 2054 { 2055 s->s3->tmp.reuse_message=1; 2056 return(1); 2057 } 2058 if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET) 2059 { 2060 al=SSL_AD_UNEXPECTED_MESSAGE; 2061 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_BAD_MESSAGE_TYPE); 2062 goto f_err; 2063 } 2064 if (n < 6) 2065 { 2066 /* need at least ticket_lifetime_hint + ticket length */ 2067 al = SSL_AD_DECODE_ERROR; 2068 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH); 2069 goto f_err; 2070 } 2071 2072 p=d=(unsigned char *)s->init_msg; 2073 n2l(p, s->session->tlsext_tick_lifetime_hint); 2074 n2s(p, ticklen); 2075 /* ticket_lifetime_hint + ticket_length + ticket */ 2076 if (ticklen + 6 != n) 2077 { 2078 al = SSL_AD_DECODE_ERROR; 2079 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH); 2080 goto f_err; 2081 } 2082 if (s->session->tlsext_tick) 2083 { 2084 OPENSSL_free(s->session->tlsext_tick); 2085 s->session->tlsext_ticklen = 0; 2086 } 2087 s->session->tlsext_tick = OPENSSL_malloc(ticklen); 2088 if (!s->session->tlsext_tick) 2089 { 2090 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE); 2091 goto err; 2092 } 2093 memcpy(s->session->tlsext_tick, p, ticklen); 2094 s->session->tlsext_ticklen = ticklen; 2095 /* There are two ways to detect a resumed ticket sesion. 2096 * One is to set an appropriate session ID and then the server 2097 * must return a match in ServerHello. This allows the normal 2098 * client session ID matching to work and we know much 2099 * earlier that the ticket has been accepted. 2100 * 2101 * The other way is to set zero length session ID when the 2102 * ticket is presented and rely on the handshake to determine 2103 * session resumption. 2104 * 2105 * We choose the former approach because this fits in with 2106 * assumptions elsewhere in OpenSSL. The session ID is set 2107 * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the 2108 * ticket. 2109 */ 2110 EVP_Digest(p, ticklen, 2111 s->session->session_id, &s->session->session_id_length, 2112#ifndef OPENSSL_NO_SHA256 2113 EVP_sha256(), NULL); 2114#else 2115 EVP_sha1(), NULL); 2116#endif 2117 ret=1; 2118 return(ret); 2119f_err: 2120 ssl3_send_alert(s,SSL3_AL_FATAL,al); 2121err: 2122 return(-1); 2123 } 2124 2125int ssl3_get_cert_status(SSL *s) 2126 { 2127 int ok, al; 2128 unsigned long resplen,n; 2129 const unsigned char *p; 2130 2131 n=s->method->ssl_get_message(s, 2132 SSL3_ST_CR_CERT_STATUS_A, 2133 SSL3_ST_CR_CERT_STATUS_B, 2134 SSL3_MT_CERTIFICATE_STATUS, 2135 16384, 2136 &ok); 2137 2138 if (!ok) return((int)n); 2139 if (n < 4) 2140 { 2141 /* need at least status type + length */ 2142 al = SSL_AD_DECODE_ERROR; 2143 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH); 2144 goto f_err; 2145 } 2146 p = (unsigned char *)s->init_msg; 2147 if (*p++ != TLSEXT_STATUSTYPE_ocsp) 2148 { 2149 al = SSL_AD_DECODE_ERROR; 2150 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_UNSUPPORTED_STATUS_TYPE); 2151 goto f_err; 2152 } 2153 n2l3(p, resplen); 2154 if (resplen + 4 != n) 2155 { 2156 al = SSL_AD_DECODE_ERROR; 2157 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH); 2158 goto f_err; 2159 } 2160 if (s->tlsext_ocsp_resp) 2161 OPENSSL_free(s->tlsext_ocsp_resp); 2162 s->tlsext_ocsp_resp = BUF_memdup(p, resplen); 2163 if (!s->tlsext_ocsp_resp) 2164 { 2165 al = SSL_AD_INTERNAL_ERROR; 2166 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE); 2167 goto f_err; 2168 } 2169 s->tlsext_ocsp_resplen = resplen; 2170 if (s->ctx->tlsext_status_cb) 2171 { 2172 int ret; 2173 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg); 2174 if (ret == 0) 2175 { 2176 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE; 2177 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_INVALID_STATUS_RESPONSE); 2178 goto f_err; 2179 } 2180 if (ret < 0) 2181 { 2182 al = SSL_AD_INTERNAL_ERROR; 2183 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE); 2184 goto f_err; 2185 } 2186 } 2187 return 1; 2188f_err: 2189 ssl3_send_alert(s,SSL3_AL_FATAL,al); 2190 return(-1); 2191 } 2192#endif 2193 2194int ssl3_get_server_done(SSL *s) 2195 { 2196 int ok,ret=0; 2197 long n; 2198 2199 n=s->method->ssl_get_message(s, 2200 SSL3_ST_CR_SRVR_DONE_A, 2201 SSL3_ST_CR_SRVR_DONE_B, 2202 SSL3_MT_SERVER_DONE, 2203 30, /* should be very small, like 0 :-) */ 2204 &ok); 2205 2206 if (!ok) return((int)n); 2207 if (n > 0) 2208 { 2209 /* should contain no data */ 2210 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 2211 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH); 2212 return -1; 2213 } 2214 ret=1; 2215 return(ret); 2216 } 2217 2218 2219int ssl3_send_client_key_exchange(SSL *s) 2220 { 2221 unsigned char *p,*d; 2222 int n; 2223 unsigned long alg_k; 2224#ifndef OPENSSL_NO_RSA 2225 unsigned char *q; 2226 EVP_PKEY *pkey=NULL; 2227#endif 2228#ifndef OPENSSL_NO_KRB5 2229 KSSL_ERR kssl_err; 2230#endif /* OPENSSL_NO_KRB5 */ 2231#ifndef OPENSSL_NO_ECDH 2232 EC_KEY *clnt_ecdh = NULL; 2233 const EC_POINT *srvr_ecpoint = NULL; 2234 EVP_PKEY *srvr_pub_pkey = NULL; 2235 unsigned char *encodedPoint = NULL; 2236 int encoded_pt_len = 0; 2237 BN_CTX * bn_ctx = NULL; 2238#endif 2239 2240 if (s->state == SSL3_ST_CW_KEY_EXCH_A) 2241 { 2242 d=(unsigned char *)s->init_buf->data; 2243 p= &(d[4]); 2244 2245 alg_k=s->s3->tmp.new_cipher->algorithm_mkey; 2246 2247 /* Fool emacs indentation */ 2248 if (0) {} 2249#ifndef OPENSSL_NO_RSA 2250 else if (alg_k & SSL_kRSA) 2251 { 2252 RSA *rsa; 2253 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; 2254 2255 if (s->session->sess_cert->peer_rsa_tmp != NULL) 2256 rsa=s->session->sess_cert->peer_rsa_tmp; 2257 else 2258 { 2259 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 2260 if ((pkey == NULL) || 2261 (pkey->type != EVP_PKEY_RSA) || 2262 (pkey->pkey.rsa == NULL)) 2263 { 2264 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 2265 goto err; 2266 } 2267 rsa=pkey->pkey.rsa; 2268 EVP_PKEY_free(pkey); 2269 } 2270 2271 tmp_buf[0]=s->client_version>>8; 2272 tmp_buf[1]=s->client_version&0xff; 2273 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0) 2274 goto err; 2275 2276 s->session->master_key_length=sizeof tmp_buf; 2277 2278 q=p; 2279 /* Fix buf for TLS and beyond */ 2280 if (s->version > SSL3_VERSION) 2281 p+=2; 2282 n=RSA_public_encrypt(sizeof tmp_buf, 2283 tmp_buf,p,rsa,RSA_PKCS1_PADDING); 2284#ifdef PKCS1_CHECK 2285 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++; 2286 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70; 2287#endif 2288 if (n <= 0) 2289 { 2290 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT); 2291 goto err; 2292 } 2293 2294 /* Fix buf for TLS and beyond */ 2295 if (s->version > SSL3_VERSION) 2296 { 2297 s2n(n,q); 2298 n+=2; 2299 } 2300 2301 s->session->master_key_length= 2302 s->method->ssl3_enc->generate_master_secret(s, 2303 s->session->master_key, 2304 tmp_buf,sizeof tmp_buf); 2305 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf); 2306 } 2307#endif 2308#ifndef OPENSSL_NO_KRB5 2309 else if (alg_k & SSL_kKRB5) 2310 { 2311 krb5_error_code krb5rc; 2312 KSSL_CTX *kssl_ctx = s->kssl_ctx; 2313 /* krb5_data krb5_ap_req; */ 2314 krb5_data *enc_ticket; 2315 krb5_data authenticator, *authp = NULL; 2316 EVP_CIPHER_CTX ciph_ctx; 2317 const EVP_CIPHER *enc = NULL; 2318 unsigned char iv[EVP_MAX_IV_LENGTH]; 2319 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; 2320 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH 2321 + EVP_MAX_IV_LENGTH]; 2322 int padl, outl = sizeof(epms); 2323 2324 EVP_CIPHER_CTX_init(&ciph_ctx); 2325 2326#ifdef KSSL_DEBUG 2327 printf("ssl3_send_client_key_exchange(%lx & %lx)\n", 2328 alg_k, SSL_kKRB5); 2329#endif /* KSSL_DEBUG */ 2330 2331 authp = NULL; 2332#ifdef KRB5SENDAUTH 2333 if (KRB5SENDAUTH) authp = &authenticator; 2334#endif /* KRB5SENDAUTH */ 2335 2336 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp, 2337 &kssl_err); 2338 enc = kssl_map_enc(kssl_ctx->enctype); 2339 if (enc == NULL) 2340 goto err; 2341#ifdef KSSL_DEBUG 2342 { 2343 printf("kssl_cget_tkt rtn %d\n", krb5rc); 2344 if (krb5rc && kssl_err.text) 2345 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text); 2346 } 2347#endif /* KSSL_DEBUG */ 2348 2349 if (krb5rc) 2350 { 2351 ssl3_send_alert(s,SSL3_AL_FATAL, 2352 SSL_AD_HANDSHAKE_FAILURE); 2353 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2354 kssl_err.reason); 2355 goto err; 2356 } 2357 2358 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ 2359 ** in place of RFC 2712 KerberosWrapper, as in: 2360 ** 2361 ** Send ticket (copy to *p, set n = length) 2362 ** n = krb5_ap_req.length; 2363 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length); 2364 ** if (krb5_ap_req.data) 2365 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req); 2366 ** 2367 ** Now using real RFC 2712 KerberosWrapper 2368 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>) 2369 ** Note: 2712 "opaque" types are here replaced 2370 ** with a 2-byte length followed by the value. 2371 ** Example: 2372 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms 2373 ** Where "xx xx" = length bytes. Shown here with 2374 ** optional authenticator omitted. 2375 */ 2376 2377 /* KerberosWrapper.Ticket */ 2378 s2n(enc_ticket->length,p); 2379 memcpy(p, enc_ticket->data, enc_ticket->length); 2380 p+= enc_ticket->length; 2381 n = enc_ticket->length + 2; 2382 2383 /* KerberosWrapper.Authenticator */ 2384 if (authp && authp->length) 2385 { 2386 s2n(authp->length,p); 2387 memcpy(p, authp->data, authp->length); 2388 p+= authp->length; 2389 n+= authp->length + 2; 2390 2391 free(authp->data); 2392 authp->data = NULL; 2393 authp->length = 0; 2394 } 2395 else 2396 { 2397 s2n(0,p);/* null authenticator length */ 2398 n+=2; 2399 } 2400 2401 tmp_buf[0]=s->client_version>>8; 2402 tmp_buf[1]=s->client_version&0xff; 2403 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0) 2404 goto err; 2405 2406 /* 20010420 VRS. Tried it this way; failed. 2407 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL); 2408 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx, 2409 ** kssl_ctx->length); 2410 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv); 2411 */ 2412 2413 memset(iv, 0, sizeof iv); /* per RFC 1510 */ 2414 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL, 2415 kssl_ctx->key,iv); 2416 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf, 2417 sizeof tmp_buf); 2418 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl); 2419 outl += padl; 2420 if (outl > (int)sizeof epms) 2421 { 2422 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); 2423 goto err; 2424 } 2425 EVP_CIPHER_CTX_cleanup(&ciph_ctx); 2426 2427 /* KerberosWrapper.EncryptedPreMasterSecret */ 2428 s2n(outl,p); 2429 memcpy(p, epms, outl); 2430 p+=outl; 2431 n+=outl + 2; 2432 2433 s->session->master_key_length= 2434 s->method->ssl3_enc->generate_master_secret(s, 2435 s->session->master_key, 2436 tmp_buf, sizeof tmp_buf); 2437 2438 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf); 2439 OPENSSL_cleanse(epms, outl); 2440 } 2441#endif 2442#ifndef OPENSSL_NO_DH 2443 else if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) 2444 { 2445 DH *dh_srvr,*dh_clnt; 2446 2447 if (s->session->sess_cert == NULL) 2448 { 2449 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 2450 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE); 2451 goto err; 2452 } 2453 2454 if (s->session->sess_cert->peer_dh_tmp != NULL) 2455 dh_srvr=s->session->sess_cert->peer_dh_tmp; 2456 else 2457 { 2458 /* we get them from the cert */ 2459 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); 2460 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS); 2461 goto err; 2462 } 2463 2464 /* generate a new random key */ 2465 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL) 2466 { 2467 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 2468 goto err; 2469 } 2470 if (!DH_generate_key(dh_clnt)) 2471 { 2472 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 2473 DH_free(dh_clnt); 2474 goto err; 2475 } 2476 2477 /* use the 'p' output buffer for the DH key, but 2478 * make sure to clear it out afterwards */ 2479 2480 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt); 2481 2482 if (n <= 0) 2483 { 2484 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 2485 DH_free(dh_clnt); 2486 goto err; 2487 } 2488 2489 /* generate master key from the result */ 2490 s->session->master_key_length= 2491 s->method->ssl3_enc->generate_master_secret(s, 2492 s->session->master_key,p,n); 2493 /* clean up */ 2494 memset(p,0,n); 2495 2496 /* send off the data */ 2497 n=BN_num_bytes(dh_clnt->pub_key); 2498 s2n(n,p); 2499 BN_bn2bin(dh_clnt->pub_key,p); 2500 n+=2; 2501 2502 DH_free(dh_clnt); 2503 2504 /* perhaps clean things up a bit EAY EAY EAY EAY*/ 2505 } 2506#endif 2507 2508#ifndef OPENSSL_NO_ECDH 2509 else if (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)) 2510 { 2511 const EC_GROUP *srvr_group = NULL; 2512 EC_KEY *tkey; 2513 int ecdh_clnt_cert = 0; 2514 int field_size = 0; 2515 2516 if (s->session->sess_cert == NULL) 2517 { 2518 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 2519 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE); 2520 goto err; 2521 } 2522 2523 /* Did we send out the client's 2524 * ECDH share for use in premaster 2525 * computation as part of client certificate? 2526 * If so, set ecdh_clnt_cert to 1. 2527 */ 2528 if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL)) 2529 { 2530 /* XXX: For now, we do not support client 2531 * authentication using ECDH certificates. 2532 * To add such support, one needs to add 2533 * code that checks for appropriate 2534 * conditions and sets ecdh_clnt_cert to 1. 2535 * For example, the cert have an ECC 2536 * key on the same curve as the server's 2537 * and the key should be authorized for 2538 * key agreement. 2539 * 2540 * One also needs to add code in ssl3_connect 2541 * to skip sending the certificate verify 2542 * message. 2543 * 2544 * if ((s->cert->key->privatekey != NULL) && 2545 * (s->cert->key->privatekey->type == 2546 * EVP_PKEY_EC) && ...) 2547 * ecdh_clnt_cert = 1; 2548 */ 2549 } 2550 2551 if (s->session->sess_cert->peer_ecdh_tmp != NULL) 2552 { 2553 tkey = s->session->sess_cert->peer_ecdh_tmp; 2554 } 2555 else 2556 { 2557 /* Get the Server Public Key from Cert */ 2558 srvr_pub_pkey = X509_get_pubkey(s->session-> \ 2559 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509); 2560 if ((srvr_pub_pkey == NULL) || 2561 (srvr_pub_pkey->type != EVP_PKEY_EC) || 2562 (srvr_pub_pkey->pkey.ec == NULL)) 2563 { 2564 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2565 ERR_R_INTERNAL_ERROR); 2566 goto err; 2567 } 2568 2569 tkey = srvr_pub_pkey->pkey.ec; 2570 } 2571 2572 srvr_group = EC_KEY_get0_group(tkey); 2573 srvr_ecpoint = EC_KEY_get0_public_key(tkey); 2574 2575 if ((srvr_group == NULL) || (srvr_ecpoint == NULL)) 2576 { 2577 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2578 ERR_R_INTERNAL_ERROR); 2579 goto err; 2580 } 2581 2582 if ((clnt_ecdh=EC_KEY_new()) == NULL) 2583 { 2584 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2585 goto err; 2586 } 2587 2588 if (!EC_KEY_set_group(clnt_ecdh, srvr_group)) 2589 { 2590 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB); 2591 goto err; 2592 } 2593 if (ecdh_clnt_cert) 2594 { 2595 /* Reuse key info from our certificate 2596 * We only need our private key to perform 2597 * the ECDH computation. 2598 */ 2599 const BIGNUM *priv_key; 2600 tkey = s->cert->key->privatekey->pkey.ec; 2601 priv_key = EC_KEY_get0_private_key(tkey); 2602 if (priv_key == NULL) 2603 { 2604 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2605 goto err; 2606 } 2607 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key)) 2608 { 2609 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB); 2610 goto err; 2611 } 2612 } 2613 else 2614 { 2615 /* Generate a new ECDH key pair */ 2616 if (!(EC_KEY_generate_key(clnt_ecdh))) 2617 { 2618 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB); 2619 goto err; 2620 } 2621 } 2622 2623 /* use the 'p' output buffer for the ECDH key, but 2624 * make sure to clear it out afterwards 2625 */ 2626 2627 field_size = EC_GROUP_get_degree(srvr_group); 2628 if (field_size <= 0) 2629 { 2630 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2631 ERR_R_ECDH_LIB); 2632 goto err; 2633 } 2634 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL); 2635 if (n <= 0) 2636 { 2637 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2638 ERR_R_ECDH_LIB); 2639 goto err; 2640 } 2641 2642 /* generate master key from the result */ 2643 s->session->master_key_length = s->method->ssl3_enc \ 2644 -> generate_master_secret(s, 2645 s->session->master_key, 2646 p, n); 2647 2648 memset(p, 0, n); /* clean up */ 2649 2650 if (ecdh_clnt_cert) 2651 { 2652 /* Send empty client key exch message */ 2653 n = 0; 2654 } 2655 else 2656 { 2657 /* First check the size of encoding and 2658 * allocate memory accordingly. 2659 */ 2660 encoded_pt_len = 2661 EC_POINT_point2oct(srvr_group, 2662 EC_KEY_get0_public_key(clnt_ecdh), 2663 POINT_CONVERSION_UNCOMPRESSED, 2664 NULL, 0, NULL); 2665 2666 encodedPoint = (unsigned char *) 2667 OPENSSL_malloc(encoded_pt_len * 2668 sizeof(unsigned char)); 2669 bn_ctx = BN_CTX_new(); 2670 if ((encodedPoint == NULL) || 2671 (bn_ctx == NULL)) 2672 { 2673 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2674 goto err; 2675 } 2676 2677 /* Encode the public key */ 2678 n = EC_POINT_point2oct(srvr_group, 2679 EC_KEY_get0_public_key(clnt_ecdh), 2680 POINT_CONVERSION_UNCOMPRESSED, 2681 encodedPoint, encoded_pt_len, bn_ctx); 2682 2683 *p = n; /* length of encoded point */ 2684 /* Encoded point will be copied here */ 2685 p += 1; 2686 /* copy the point */ 2687 memcpy((unsigned char *)p, encodedPoint, n); 2688 /* increment n to account for length field */ 2689 n += 1; 2690 } 2691 2692 /* Free allocated memory */ 2693 BN_CTX_free(bn_ctx); 2694 if (encodedPoint != NULL) OPENSSL_free(encodedPoint); 2695 if (clnt_ecdh != NULL) 2696 EC_KEY_free(clnt_ecdh); 2697 EVP_PKEY_free(srvr_pub_pkey); 2698 } 2699#endif /* !OPENSSL_NO_ECDH */ 2700 else if (alg_k & SSL_kGOST) 2701 { 2702 /* GOST key exchange message creation */ 2703 EVP_PKEY_CTX *pkey_ctx; 2704 X509 *peer_cert; 2705 size_t msglen; 2706 unsigned int md_len; 2707 int keytype; 2708 unsigned char premaster_secret[32],shared_ukm[32], tmp[256]; 2709 EVP_MD_CTX *ukm_hash; 2710 EVP_PKEY *pub_key; 2711 2712 /* Get server sertificate PKEY and create ctx from it */ 2713 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST01)].x509; 2714 if (!peer_cert) 2715 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST94)].x509; 2716 if (!peer_cert) { 2717 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER); 2718 goto err; 2719 } 2720 2721 pkey_ctx=EVP_PKEY_CTX_new(pub_key=X509_get_pubkey(peer_cert),NULL); 2722 /* If we have send a certificate, and certificate key 2723 2724 * parameters match those of server certificate, use 2725 * certificate key for key exchange 2726 */ 2727 2728 /* Otherwise, generate ephemeral key pair */ 2729 2730 EVP_PKEY_encrypt_init(pkey_ctx); 2731 /* Generate session key */ 2732 RAND_bytes(premaster_secret,32); 2733 /* If we have client certificate, use its secret as peer key */ 2734 if (s->s3->tmp.cert_req && s->cert->key->privatekey) { 2735 if (EVP_PKEY_derive_set_peer(pkey_ctx,s->cert->key->privatekey) <=0) { 2736 /* If there was an error - just ignore it. Ephemeral key 2737 * would be used 2738 */ 2739 ERR_clear_error(); 2740 } 2741 } 2742 /* Compute shared IV and store it in algorithm-specific 2743 * context data */ 2744 ukm_hash = EVP_MD_CTX_create(); 2745 EVP_DigestInit(ukm_hash,EVP_get_digestbynid(NID_id_GostR3411_94)); 2746 EVP_DigestUpdate(ukm_hash,s->s3->client_random,SSL3_RANDOM_SIZE); 2747 EVP_DigestUpdate(ukm_hash,s->s3->server_random,SSL3_RANDOM_SIZE); 2748 EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len); 2749 EVP_MD_CTX_destroy(ukm_hash); 2750 if (EVP_PKEY_CTX_ctrl(pkey_ctx,-1,EVP_PKEY_OP_ENCRYPT,EVP_PKEY_CTRL_SET_IV, 2751 8,shared_ukm)<0) { 2752 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2753 SSL_R_LIBRARY_BUG); 2754 goto err; 2755 } 2756 /* Make GOST keytransport blob message */ 2757 /*Encapsulate it into sequence */ 2758 *(p++)=V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED; 2759 msglen=255; 2760 if (EVP_PKEY_encrypt(pkey_ctx,tmp,&msglen,premaster_secret,32)<0) { 2761 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2762 SSL_R_LIBRARY_BUG); 2763 goto err; 2764 } 2765 if (msglen >= 0x80) 2766 { 2767 *(p++)=0x81; 2768 *(p++)= msglen & 0xff; 2769 n=msglen+3; 2770 } 2771 else 2772 { 2773 *(p++)= msglen & 0xff; 2774 n=msglen+2; 2775 } 2776 memcpy(p, tmp, msglen); 2777 /* Check if pubkey from client certificate was used */ 2778 if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0) 2779 { 2780 /* Set flag "skip certificate verify" */ 2781 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY; 2782 } 2783 EVP_PKEY_CTX_free(pkey_ctx); 2784 s->session->master_key_length= 2785 s->method->ssl3_enc->generate_master_secret(s, 2786 s->session->master_key,premaster_secret,32); 2787 EVP_PKEY_free(pub_key); 2788 2789 } 2790#ifndef OPENSSL_NO_SRP 2791 else if (alg_k & SSL_kSRP) 2792 { 2793 if (s->srp_ctx.A != NULL) 2794 { 2795 /* send off the data */ 2796 n=BN_num_bytes(s->srp_ctx.A); 2797 s2n(n,p); 2798 BN_bn2bin(s->srp_ctx.A,p); 2799 n+=2; 2800 } 2801 else 2802 { 2803 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 2804 goto err; 2805 } 2806 if (s->session->srp_username != NULL) 2807 OPENSSL_free(s->session->srp_username); 2808 s->session->srp_username = BUF_strdup(s->srp_ctx.login); 2809 if (s->session->srp_username == NULL) 2810 { 2811 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2812 ERR_R_MALLOC_FAILURE); 2813 goto err; 2814 } 2815 2816 if ((s->session->master_key_length = SRP_generate_client_master_secret(s,s->session->master_key))<0) 2817 { 2818 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 2819 goto err; 2820 } 2821 } 2822#endif 2823#ifndef OPENSSL_NO_PSK 2824 else if (alg_k & SSL_kPSK) 2825 { 2826 char identity[PSK_MAX_IDENTITY_LEN]; 2827 unsigned char *t = NULL; 2828 unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4]; 2829 unsigned int pre_ms_len = 0, psk_len = 0; 2830 int psk_err = 1; 2831 2832 n = 0; 2833 if (s->psk_client_callback == NULL) 2834 { 2835 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2836 SSL_R_PSK_NO_CLIENT_CB); 2837 goto err; 2838 } 2839 2840 psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint, 2841 identity, PSK_MAX_IDENTITY_LEN, 2842 psk_or_pre_ms, sizeof(psk_or_pre_ms)); 2843 if (psk_len > PSK_MAX_PSK_LEN) 2844 { 2845 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2846 ERR_R_INTERNAL_ERROR); 2847 goto psk_err; 2848 } 2849 else if (psk_len == 0) 2850 { 2851 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2852 SSL_R_PSK_IDENTITY_NOT_FOUND); 2853 goto psk_err; 2854 } 2855 2856 /* create PSK pre_master_secret */ 2857 pre_ms_len = 2+psk_len+2+psk_len; 2858 t = psk_or_pre_ms; 2859 memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len); 2860 s2n(psk_len, t); 2861 memset(t, 0, psk_len); 2862 t+=psk_len; 2863 s2n(psk_len, t); 2864 2865 if (s->session->psk_identity_hint != NULL) 2866 OPENSSL_free(s->session->psk_identity_hint); 2867 s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint); 2868 if (s->ctx->psk_identity_hint != NULL && 2869 s->session->psk_identity_hint == NULL) 2870 { 2871 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2872 ERR_R_MALLOC_FAILURE); 2873 goto psk_err; 2874 } 2875 2876 if (s->session->psk_identity != NULL) 2877 OPENSSL_free(s->session->psk_identity); 2878 s->session->psk_identity = BUF_strdup(identity); 2879 if (s->session->psk_identity == NULL) 2880 { 2881 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2882 ERR_R_MALLOC_FAILURE); 2883 goto psk_err; 2884 } 2885 2886 s->session->master_key_length = 2887 s->method->ssl3_enc->generate_master_secret(s, 2888 s->session->master_key, 2889 psk_or_pre_ms, pre_ms_len); 2890 n = strlen(identity); 2891 s2n(n, p); 2892 memcpy(p, identity, n); 2893 n+=2; 2894 psk_err = 0; 2895 psk_err: 2896 OPENSSL_cleanse(identity, PSK_MAX_IDENTITY_LEN); 2897 OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms)); 2898 if (psk_err != 0) 2899 { 2900 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); 2901 goto err; 2902 } 2903 } 2904#endif 2905 else 2906 { 2907 ssl3_send_alert(s, SSL3_AL_FATAL, 2908 SSL_AD_HANDSHAKE_FAILURE); 2909 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2910 ERR_R_INTERNAL_ERROR); 2911 goto err; 2912 } 2913 2914 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE; 2915 l2n3(n,d); 2916 2917 s->state=SSL3_ST_CW_KEY_EXCH_B; 2918 /* number of bytes to write */ 2919 s->init_num=n+4; 2920 s->init_off=0; 2921 } 2922 2923 /* SSL3_ST_CW_KEY_EXCH_B */ 2924 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 2925err: 2926#ifndef OPENSSL_NO_ECDH 2927 BN_CTX_free(bn_ctx); 2928 if (encodedPoint != NULL) OPENSSL_free(encodedPoint); 2929 if (clnt_ecdh != NULL) 2930 EC_KEY_free(clnt_ecdh); 2931 EVP_PKEY_free(srvr_pub_pkey); 2932#endif 2933 return(-1); 2934 } 2935 2936int ssl3_send_client_verify(SSL *s) 2937 { 2938 unsigned char *p,*d; 2939 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH]; 2940 EVP_PKEY *pkey; 2941 EVP_PKEY_CTX *pctx=NULL; 2942 EVP_MD_CTX mctx; 2943 unsigned u=0; 2944 unsigned long n; 2945 int j; 2946 2947 EVP_MD_CTX_init(&mctx); 2948 2949 if (s->state == SSL3_ST_CW_CERT_VRFY_A) 2950 { 2951 d=(unsigned char *)s->init_buf->data; 2952 p= &(d[4]); 2953 pkey=s->cert->key->privatekey; 2954/* Create context from key and test if sha1 is allowed as digest */ 2955 pctx = EVP_PKEY_CTX_new(pkey,NULL); 2956 EVP_PKEY_sign_init(pctx); 2957 if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1())>0) 2958 { 2959 if (TLS1_get_version(s) < TLS1_2_VERSION) 2960 s->method->ssl3_enc->cert_verify_mac(s, 2961 NID_sha1, 2962 &(data[MD5_DIGEST_LENGTH])); 2963 } 2964 else 2965 { 2966 ERR_clear_error(); 2967 } 2968 /* For TLS v1.2 send signature algorithm and signature 2969 * using agreed digest and cached handshake records. 2970 */ 2971 if (TLS1_get_version(s) >= TLS1_2_VERSION) 2972 { 2973 long hdatalen = 0; 2974 void *hdata; 2975 const EVP_MD *md = s->cert->key->digest; 2976 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, 2977 &hdata); 2978 if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md)) 2979 { 2980 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, 2981 ERR_R_INTERNAL_ERROR); 2982 goto err; 2983 } 2984 p += 2; 2985#ifdef SSL_DEBUG 2986 fprintf(stderr, "Using TLS 1.2 with client alg %s\n", 2987 EVP_MD_name(md)); 2988#endif 2989 if (!EVP_SignInit_ex(&mctx, md, NULL) 2990 || !EVP_SignUpdate(&mctx, hdata, hdatalen) 2991 || !EVP_SignFinal(&mctx, p + 2, &u, pkey)) 2992 { 2993 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, 2994 ERR_R_EVP_LIB); 2995 goto err; 2996 } 2997 s2n(u,p); 2998 n = u + 4; 2999 if (!ssl3_digest_cached_records(s)) 3000 goto err; 3001 } 3002 else 3003#ifndef OPENSSL_NO_RSA 3004 if (pkey->type == EVP_PKEY_RSA) 3005 { 3006 s->method->ssl3_enc->cert_verify_mac(s, 3007 NID_md5, 3008 &(data[0])); 3009 if (RSA_sign(NID_md5_sha1, data, 3010 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH, 3011 &(p[2]), &u, pkey->pkey.rsa) <= 0 ) 3012 { 3013 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB); 3014 goto err; 3015 } 3016 s2n(u,p); 3017 n=u+2; 3018 } 3019 else 3020#endif 3021#ifndef OPENSSL_NO_DSA 3022 if (pkey->type == EVP_PKEY_DSA) 3023 { 3024 if (!DSA_sign(pkey->save_type, 3025 &(data[MD5_DIGEST_LENGTH]), 3026 SHA_DIGEST_LENGTH,&(p[2]), 3027 (unsigned int *)&j,pkey->pkey.dsa)) 3028 { 3029 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB); 3030 goto err; 3031 } 3032 s2n(j,p); 3033 n=j+2; 3034 } 3035 else 3036#endif 3037#ifndef OPENSSL_NO_ECDSA 3038 if (pkey->type == EVP_PKEY_EC) 3039 { 3040 if (!ECDSA_sign(pkey->save_type, 3041 &(data[MD5_DIGEST_LENGTH]), 3042 SHA_DIGEST_LENGTH,&(p[2]), 3043 (unsigned int *)&j,pkey->pkey.ec)) 3044 { 3045 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, 3046 ERR_R_ECDSA_LIB); 3047 goto err; 3048 } 3049 s2n(j,p); 3050 n=j+2; 3051 } 3052 else 3053#endif 3054 if (pkey->type == NID_id_GostR3410_94 || pkey->type == NID_id_GostR3410_2001) 3055 { 3056 unsigned char signbuf[64]; 3057 int i; 3058 size_t sigsize=64; 3059 s->method->ssl3_enc->cert_verify_mac(s, 3060 NID_id_GostR3411_94, 3061 data); 3062 if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) { 3063 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, 3064 ERR_R_INTERNAL_ERROR); 3065 goto err; 3066 } 3067 for (i=63,j=0; i>=0; j++, i--) { 3068 p[2+j]=signbuf[i]; 3069 } 3070 s2n(j,p); 3071 n=j+2; 3072 } 3073 else 3074 { 3075 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR); 3076 goto err; 3077 } 3078 *(d++)=SSL3_MT_CERTIFICATE_VERIFY; 3079 l2n3(n,d); 3080 3081 s->state=SSL3_ST_CW_CERT_VRFY_B; 3082 s->init_num=(int)n+4; 3083 s->init_off=0; 3084 } 3085 EVP_MD_CTX_cleanup(&mctx); 3086 EVP_PKEY_CTX_free(pctx); 3087 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 3088err: 3089 EVP_MD_CTX_cleanup(&mctx); 3090 EVP_PKEY_CTX_free(pctx); 3091 return(-1); 3092 } 3093 3094int ssl3_send_client_certificate(SSL *s) 3095 { 3096 X509 *x509=NULL; 3097 EVP_PKEY *pkey=NULL; 3098 int i; 3099 unsigned long l; 3100 3101 if (s->state == SSL3_ST_CW_CERT_A) 3102 { 3103 if ((s->cert == NULL) || 3104 (s->cert->key->x509 == NULL) || 3105 (s->cert->key->privatekey == NULL)) 3106 s->state=SSL3_ST_CW_CERT_B; 3107 else 3108 s->state=SSL3_ST_CW_CERT_C; 3109 } 3110 3111 /* We need to get a client cert */ 3112 if (s->state == SSL3_ST_CW_CERT_B) 3113 { 3114 /* If we get an error, we need to 3115 * ssl->rwstate=SSL_X509_LOOKUP; return(-1); 3116 * We then get retied later */ 3117 i=0; 3118 i = ssl_do_client_cert_cb(s, &x509, &pkey); 3119 if (i < 0) 3120 { 3121 s->rwstate=SSL_X509_LOOKUP; 3122 return(-1); 3123 } 3124 s->rwstate=SSL_NOTHING; 3125 if ((i == 1) && (pkey != NULL) && (x509 != NULL)) 3126 { 3127 s->state=SSL3_ST_CW_CERT_B; 3128 if ( !SSL_use_certificate(s,x509) || 3129 !SSL_use_PrivateKey(s,pkey)) 3130 i=0; 3131 } 3132 else if (i == 1) 3133 { 3134 i=0; 3135 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); 3136 } 3137 3138 if (x509 != NULL) X509_free(x509); 3139 if (pkey != NULL) EVP_PKEY_free(pkey); 3140 if (i == 0) 3141 { 3142 if (s->version == SSL3_VERSION) 3143 { 3144 s->s3->tmp.cert_req=0; 3145 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE); 3146 return(1); 3147 } 3148 else 3149 { 3150 s->s3->tmp.cert_req=2; 3151 } 3152 } 3153 3154 /* Ok, we have a cert */ 3155 s->state=SSL3_ST_CW_CERT_C; 3156 } 3157 3158 if (s->state == SSL3_ST_CW_CERT_C) 3159 { 3160 s->state=SSL3_ST_CW_CERT_D; 3161 l=ssl3_output_cert_chain(s, 3162 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509); 3163 s->init_num=(int)l; 3164 s->init_off=0; 3165 } 3166 /* SSL3_ST_CW_CERT_D */ 3167 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 3168 } 3169 3170#define has_bits(i,m) (((i)&(m)) == (m)) 3171 3172int ssl3_check_cert_and_algorithm(SSL *s) 3173 { 3174 int i,idx; 3175 long alg_k,alg_a; 3176 EVP_PKEY *pkey=NULL; 3177 SESS_CERT *sc; 3178#ifndef OPENSSL_NO_RSA 3179 RSA *rsa; 3180#endif 3181#ifndef OPENSSL_NO_DH 3182 DH *dh; 3183#endif 3184 3185 alg_k=s->s3->tmp.new_cipher->algorithm_mkey; 3186 alg_a=s->s3->tmp.new_cipher->algorithm_auth; 3187 3188 /* we don't have a certificate */ 3189 if ((alg_a & (SSL_aDH|SSL_aNULL|SSL_aKRB5)) || (alg_k & SSL_kPSK)) 3190 return(1); 3191 3192 sc=s->session->sess_cert; 3193 if (sc == NULL) 3194 { 3195 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR); 3196 goto err; 3197 } 3198 3199#ifndef OPENSSL_NO_RSA 3200 rsa=s->session->sess_cert->peer_rsa_tmp; 3201#endif 3202#ifndef OPENSSL_NO_DH 3203 dh=s->session->sess_cert->peer_dh_tmp; 3204#endif 3205 3206 /* This is the passed certificate */ 3207 3208 idx=sc->peer_cert_type; 3209#ifndef OPENSSL_NO_ECDH 3210 if (idx == SSL_PKEY_ECC) 3211 { 3212 if (ssl_check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509, 3213 s) == 0) 3214 { /* check failed */ 3215 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT); 3216 goto f_err; 3217 } 3218 else 3219 { 3220 return 1; 3221 } 3222 } 3223#endif 3224 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509); 3225 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey); 3226 EVP_PKEY_free(pkey); 3227 3228 3229 /* Check that we have a certificate if we require one */ 3230 if ((alg_a & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN)) 3231 { 3232 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT); 3233 goto f_err; 3234 } 3235#ifndef OPENSSL_NO_DSA 3236 else if ((alg_a & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN)) 3237 { 3238 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT); 3239 goto f_err; 3240 } 3241#endif 3242#ifndef OPENSSL_NO_RSA 3243 if ((alg_k & SSL_kRSA) && 3244 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL))) 3245 { 3246 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT); 3247 goto f_err; 3248 } 3249#endif 3250#ifndef OPENSSL_NO_DH 3251 if ((alg_k & SSL_kEDH) && 3252 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL))) 3253 { 3254 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY); 3255 goto f_err; 3256 } 3257 else if ((alg_k & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA)) 3258 { 3259 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT); 3260 goto f_err; 3261 } 3262#ifndef OPENSSL_NO_DSA 3263 else if ((alg_k & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA)) 3264 { 3265 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT); 3266 goto f_err; 3267 } 3268#endif 3269#endif 3270 3271 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP)) 3272 { 3273#ifndef OPENSSL_NO_RSA 3274 if (alg_k & SSL_kRSA) 3275 { 3276 if (rsa == NULL 3277 || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) 3278 { 3279 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY); 3280 goto f_err; 3281 } 3282 } 3283 else 3284#endif 3285#ifndef OPENSSL_NO_DH 3286 if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) 3287 { 3288 if (dh == NULL 3289 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) 3290 { 3291 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY); 3292 goto f_err; 3293 } 3294 } 3295 else 3296#endif 3297 { 3298 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE); 3299 goto f_err; 3300 } 3301 } 3302 return(1); 3303f_err: 3304 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); 3305err: 3306 return(0); 3307 } 3308 3309#if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG) 3310int ssl3_send_next_proto(SSL *s) 3311 { 3312 unsigned int len, padding_len; 3313 unsigned char *d; 3314 3315 if (s->state == SSL3_ST_CW_NEXT_PROTO_A) 3316 { 3317 len = s->next_proto_negotiated_len; 3318 padding_len = 32 - ((len + 2) % 32); 3319 d = (unsigned char *)s->init_buf->data; 3320 d[4] = len; 3321 memcpy(d + 5, s->next_proto_negotiated, len); 3322 d[5 + len] = padding_len; 3323 memset(d + 6 + len, 0, padding_len); 3324 *(d++)=SSL3_MT_NEXT_PROTO; 3325 l2n3(2 + len + padding_len, d); 3326 s->state = SSL3_ST_CW_NEXT_PROTO_B; 3327 s->init_num = 4 + 2 + len + padding_len; 3328 s->init_off = 0; 3329 } 3330 3331 return ssl3_do_write(s, SSL3_RT_HANDSHAKE); 3332} 3333#endif /* !OPENSSL_NO_TLSEXT && !OPENSSL_NO_NEXTPROTONEG */ 3334 3335/* Check to see if handshake is full or resumed. Usually this is just a 3336 * case of checking to see if a cache hit has occurred. In the case of 3337 * session tickets we have to check the next message to be sure. 3338 */ 3339 3340#ifndef OPENSSL_NO_TLSEXT 3341int ssl3_check_finished(SSL *s) 3342 { 3343 int ok; 3344 long n; 3345 /* If we have no ticket it cannot be a resumed session. */ 3346 if (!s->session->tlsext_tick) 3347 return 1; 3348 /* this function is called when we really expect a Certificate 3349 * message, so permit appropriate message length */ 3350 n=s->method->ssl_get_message(s, 3351 SSL3_ST_CR_CERT_A, 3352 SSL3_ST_CR_CERT_B, 3353 -1, 3354 s->max_cert_list, 3355 &ok); 3356 if (!ok) return((int)n); 3357 s->s3->tmp.reuse_message = 1; 3358 if ((s->s3->tmp.message_type == SSL3_MT_FINISHED) 3359 || (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET)) 3360 return 2; 3361 3362 return 1; 3363 } 3364#endif 3365 3366int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey) 3367 { 3368 int i = 0; 3369#ifndef OPENSSL_NO_ENGINE 3370 if (s->ctx->client_cert_engine) 3371 { 3372 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s, 3373 SSL_get_client_CA_list(s), 3374 px509, ppkey, NULL, NULL, NULL); 3375 if (i != 0) 3376 return i; 3377 } 3378#endif 3379 if (s->ctx->client_cert_cb) 3380 i = s->ctx->client_cert_cb(s,px509,ppkey); 3381 return i; 3382 } 3383