s3_clnt.c revision 264331
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 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A, 563 SSL3_ST_CR_FINISHED_B); 564 if (ret <= 0) goto end; 565 566 if (s->hit) 567 s->state=SSL3_ST_CW_CHANGE_A; 568 else 569 s->state=SSL_ST_OK; 570 s->init_num=0; 571 break; 572 573 case SSL3_ST_CW_FLUSH: 574 s->rwstate=SSL_WRITING; 575 if (BIO_flush(s->wbio) <= 0) 576 { 577 ret= -1; 578 goto end; 579 } 580 s->rwstate=SSL_NOTHING; 581 s->state=s->s3->tmp.next_state; 582 break; 583 584 case SSL_ST_OK: 585 /* clean a few things up */ 586 ssl3_cleanup_key_block(s); 587 588 if (s->init_buf != NULL) 589 { 590 BUF_MEM_free(s->init_buf); 591 s->init_buf=NULL; 592 } 593 594 /* If we are not 'joining' the last two packets, 595 * remove the buffering now */ 596 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER)) 597 ssl_free_wbio_buffer(s); 598 /* else do it later in ssl3_write */ 599 600 s->init_num=0; 601 s->renegotiate=0; 602 s->new_session=0; 603 604 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT); 605 if (s->hit) s->ctx->stats.sess_hit++; 606 607 ret=1; 608 /* s->server=0; */ 609 s->handshake_func=ssl3_connect; 610 s->ctx->stats.sess_connect_good++; 611 612 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1); 613 614 goto end; 615 /* break; */ 616 617 default: 618 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE); 619 ret= -1; 620 goto end; 621 /* break; */ 622 } 623 624 /* did we do anything */ 625 if (!s->s3->tmp.reuse_message && !skip) 626 { 627 if (s->debug) 628 { 629 if ((ret=BIO_flush(s->wbio)) <= 0) 630 goto end; 631 } 632 633 if ((cb != NULL) && (s->state != state)) 634 { 635 new_state=s->state; 636 s->state=state; 637 cb(s,SSL_CB_CONNECT_LOOP,1); 638 s->state=new_state; 639 } 640 } 641 skip=0; 642 } 643end: 644 s->in_handshake--; 645 if (buf != NULL) 646 BUF_MEM_free(buf); 647 if (cb != NULL) 648 cb(s,SSL_CB_CONNECT_EXIT,ret); 649 return(ret); 650 } 651 652 653int ssl3_client_hello(SSL *s) 654 { 655 unsigned char *buf; 656 unsigned char *p,*d; 657 int i; 658 unsigned long l; 659#ifndef OPENSSL_NO_COMP 660 int j; 661 SSL_COMP *comp; 662#endif 663 664 buf=(unsigned char *)s->init_buf->data; 665 if (s->state == SSL3_ST_CW_CLNT_HELLO_A) 666 { 667 SSL_SESSION *sess = s->session; 668 if ((sess == NULL) || 669 (sess->ssl_version != s->version) || 670#ifdef OPENSSL_NO_TLSEXT 671 !sess->session_id_length || 672#else 673 (!sess->session_id_length && !sess->tlsext_tick) || 674#endif 675 (sess->not_resumable)) 676 { 677 if (!ssl_get_new_session(s,0)) 678 goto err; 679 } 680 /* else use the pre-loaded session */ 681 682 p=s->s3->client_random; 683 684 if (ssl_fill_hello_random(s, 0, p, SSL3_RANDOM_SIZE) <= 0) 685 goto err; 686 687 /* Do the message type and length last */ 688 d=p= &(buf[4]); 689 690 /* version indicates the negotiated version: for example from 691 * an SSLv2/v3 compatible client hello). The client_version 692 * field is the maximum version we permit and it is also 693 * used in RSA encrypted premaster secrets. Some servers can 694 * choke if we initially report a higher version then 695 * renegotiate to a lower one in the premaster secret. This 696 * didn't happen with TLS 1.0 as most servers supported it 697 * but it can with TLS 1.1 or later if the server only supports 698 * 1.0. 699 * 700 * Possible scenario with previous logic: 701 * 1. Client hello indicates TLS 1.2 702 * 2. Server hello says TLS 1.0 703 * 3. RSA encrypted premaster secret uses 1.2. 704 * 4. Handhaked proceeds using TLS 1.0. 705 * 5. Server sends hello request to renegotiate. 706 * 6. Client hello indicates TLS v1.0 as we now 707 * know that is maximum server supports. 708 * 7. Server chokes on RSA encrypted premaster secret 709 * containing version 1.0. 710 * 711 * For interoperability it should be OK to always use the 712 * maximum version we support in client hello and then rely 713 * on the checking of version to ensure the servers isn't 714 * being inconsistent: for example initially negotiating with 715 * TLS 1.0 and renegotiating with TLS 1.2. We do this by using 716 * client_version in client hello and not resetting it to 717 * the negotiated version. 718 */ 719#if 0 720 *(p++)=s->version>>8; 721 *(p++)=s->version&0xff; 722 s->client_version=s->version; 723#else 724 *(p++)=s->client_version>>8; 725 *(p++)=s->client_version&0xff; 726#endif 727 728 /* Random stuff */ 729 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE); 730 p+=SSL3_RANDOM_SIZE; 731 732 /* Session ID */ 733 if (s->new_session) 734 i=0; 735 else 736 i=s->session->session_id_length; 737 *(p++)=i; 738 if (i != 0) 739 { 740 if (i > (int)sizeof(s->session->session_id)) 741 { 742 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); 743 goto err; 744 } 745 memcpy(p,s->session->session_id,i); 746 p+=i; 747 } 748 749 /* Ciphers supported */ 750 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0); 751 if (i == 0) 752 { 753 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE); 754 goto err; 755 } 756#ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH 757 /* Some servers hang if client hello > 256 bytes 758 * as hack workaround chop number of supported ciphers 759 * to keep it well below this if we use TLS v1.2 760 */ 761 if (TLS1_get_version(s) >= TLS1_2_VERSION 762 && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH) 763 i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1; 764#endif 765 s2n(i,p); 766 p+=i; 767 768 /* COMPRESSION */ 769#ifdef OPENSSL_NO_COMP 770 *(p++)=1; 771#else 772 773 if ((s->options & SSL_OP_NO_COMPRESSION) 774 || !s->ctx->comp_methods) 775 j=0; 776 else 777 j=sk_SSL_COMP_num(s->ctx->comp_methods); 778 *(p++)=1+j; 779 for (i=0; i<j; i++) 780 { 781 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i); 782 *(p++)=comp->id; 783 } 784#endif 785 *(p++)=0; /* Add the NULL method */ 786 787#ifndef OPENSSL_NO_TLSEXT 788 /* TLS extensions*/ 789 if (ssl_prepare_clienthello_tlsext(s) <= 0) 790 { 791 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT); 792 goto err; 793 } 794 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL) 795 { 796 SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR); 797 goto err; 798 } 799#endif 800 801 l=(p-d); 802 d=buf; 803 *(d++)=SSL3_MT_CLIENT_HELLO; 804 l2n3(l,d); 805 806 s->state=SSL3_ST_CW_CLNT_HELLO_B; 807 /* number of bytes to write */ 808 s->init_num=p-buf; 809 s->init_off=0; 810 } 811 812 /* SSL3_ST_CW_CLNT_HELLO_B */ 813 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 814err: 815 return(-1); 816 } 817 818int ssl3_get_server_hello(SSL *s) 819 { 820 STACK_OF(SSL_CIPHER) *sk; 821 const SSL_CIPHER *c; 822 unsigned char *p,*d; 823 int i,al,ok; 824 unsigned int j; 825 long n; 826#ifndef OPENSSL_NO_COMP 827 SSL_COMP *comp; 828#endif 829 830 n=s->method->ssl_get_message(s, 831 SSL3_ST_CR_SRVR_HELLO_A, 832 SSL3_ST_CR_SRVR_HELLO_B, 833 -1, 834 20000, /* ?? */ 835 &ok); 836 837 if (!ok) return((int)n); 838 839 if ( SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER) 840 { 841 if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST) 842 { 843 if ( s->d1->send_cookie == 0) 844 { 845 s->s3->tmp.reuse_message = 1; 846 return 1; 847 } 848 else /* already sent a cookie */ 849 { 850 al=SSL_AD_UNEXPECTED_MESSAGE; 851 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE); 852 goto f_err; 853 } 854 } 855 } 856 857 if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO) 858 { 859 al=SSL_AD_UNEXPECTED_MESSAGE; 860 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE); 861 goto f_err; 862 } 863 864 d=p=(unsigned char *)s->init_msg; 865 866 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff))) 867 { 868 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION); 869 s->version=(s->version&0xff00)|p[1]; 870 al=SSL_AD_PROTOCOL_VERSION; 871 goto f_err; 872 } 873 p+=2; 874 875 /* load the server hello data */ 876 /* load the server random */ 877 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE); 878 p+=SSL3_RANDOM_SIZE; 879 880 /* get the session-id */ 881 j= *(p++); 882 883 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE)) 884 { 885 al=SSL_AD_ILLEGAL_PARAMETER; 886 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG); 887 goto f_err; 888 } 889 890#ifndef OPENSSL_NO_TLSEXT 891 /* check if we want to resume the session based on external pre-shared secret */ 892 if (s->version >= TLS1_VERSION && s->tls_session_secret_cb) 893 { 894 SSL_CIPHER *pref_cipher=NULL; 895 s->session->master_key_length=sizeof(s->session->master_key); 896 if (s->tls_session_secret_cb(s, s->session->master_key, 897 &s->session->master_key_length, 898 NULL, &pref_cipher, 899 s->tls_session_secret_cb_arg)) 900 { 901 s->session->cipher = pref_cipher ? 902 pref_cipher : ssl_get_cipher_by_char(s, p+j); 903 } 904 } 905#endif /* OPENSSL_NO_TLSEXT */ 906 907 if (j != 0 && j == s->session->session_id_length 908 && memcmp(p,s->session->session_id,j) == 0) 909 { 910 if(s->sid_ctx_length != s->session->sid_ctx_length 911 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length)) 912 { 913 /* actually a client application bug */ 914 al=SSL_AD_ILLEGAL_PARAMETER; 915 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); 916 goto f_err; 917 } 918 s->hit=1; 919 } 920 else /* a miss or crap from the other end */ 921 { 922 /* If we were trying for session-id reuse, make a new 923 * SSL_SESSION so we don't stuff up other people */ 924 s->hit=0; 925 if (s->session->session_id_length > 0) 926 { 927 if (!ssl_get_new_session(s,0)) 928 { 929 al=SSL_AD_INTERNAL_ERROR; 930 goto f_err; 931 } 932 } 933 s->session->session_id_length=j; 934 memcpy(s->session->session_id,p,j); /* j could be 0 */ 935 } 936 p+=j; 937 c=ssl_get_cipher_by_char(s,p); 938 if (c == NULL) 939 { 940 /* unknown cipher */ 941 al=SSL_AD_ILLEGAL_PARAMETER; 942 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED); 943 goto f_err; 944 } 945 /* TLS v1.2 only ciphersuites require v1.2 or later */ 946 if ((c->algorithm_ssl & SSL_TLSV1_2) && 947 (TLS1_get_version(s) < TLS1_2_VERSION)) 948 { 949 al=SSL_AD_ILLEGAL_PARAMETER; 950 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED); 951 goto f_err; 952 } 953 p+=ssl_put_cipher_by_char(s,NULL,NULL); 954 955 sk=ssl_get_ciphers_by_id(s); 956 i=sk_SSL_CIPHER_find(sk,c); 957 if (i < 0) 958 { 959 /* we did not say we would use this cipher */ 960 al=SSL_AD_ILLEGAL_PARAMETER; 961 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED); 962 goto f_err; 963 } 964 965 /* Depending on the session caching (internal/external), the cipher 966 and/or cipher_id values may not be set. Make sure that 967 cipher_id is set and use it for comparison. */ 968 if (s->session->cipher) 969 s->session->cipher_id = s->session->cipher->id; 970 if (s->hit && (s->session->cipher_id != c->id)) 971 { 972/* Workaround is now obsolete */ 973#if 0 974 if (!(s->options & 975 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG)) 976#endif 977 { 978 al=SSL_AD_ILLEGAL_PARAMETER; 979 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); 980 goto f_err; 981 } 982 } 983 s->s3->tmp.new_cipher=c; 984 /* Don't digest cached records if TLS v1.2: we may need them for 985 * client authentication. 986 */ 987 if (TLS1_get_version(s) < TLS1_2_VERSION && !ssl3_digest_cached_records(s)) 988 { 989 al = SSL_AD_INTERNAL_ERROR; 990 goto f_err; 991 } 992 /* lets get the compression algorithm */ 993 /* COMPRESSION */ 994#ifdef OPENSSL_NO_COMP 995 if (*(p++) != 0) 996 { 997 al=SSL_AD_ILLEGAL_PARAMETER; 998 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); 999 goto f_err; 1000 } 1001 /* If compression is disabled we'd better not try to resume a session 1002 * using compression. 1003 */ 1004 if (s->session->compress_meth != 0) 1005 { 1006 al=SSL_AD_INTERNAL_ERROR; 1007 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_INCONSISTENT_COMPRESSION); 1008 goto f_err; 1009 } 1010#else 1011 j= *(p++); 1012 if (s->hit && j != s->session->compress_meth) 1013 { 1014 al=SSL_AD_ILLEGAL_PARAMETER; 1015 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED); 1016 goto f_err; 1017 } 1018 if (j == 0) 1019 comp=NULL; 1020 else if (s->options & SSL_OP_NO_COMPRESSION) 1021 { 1022 al=SSL_AD_ILLEGAL_PARAMETER; 1023 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_COMPRESSION_DISABLED); 1024 goto f_err; 1025 } 1026 else 1027 comp=ssl3_comp_find(s->ctx->comp_methods,j); 1028 1029 if ((j != 0) && (comp == NULL)) 1030 { 1031 al=SSL_AD_ILLEGAL_PARAMETER; 1032 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); 1033 goto f_err; 1034 } 1035 else 1036 { 1037 s->s3->tmp.new_compression=comp; 1038 } 1039#endif 1040 1041#ifndef OPENSSL_NO_TLSEXT 1042 /* TLS extensions*/ 1043 if (s->version >= SSL3_VERSION) 1044 { 1045 if (!ssl_parse_serverhello_tlsext(s,&p,d,n, &al)) 1046 { 1047 /* 'al' set by ssl_parse_serverhello_tlsext */ 1048 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT); 1049 goto f_err; 1050 } 1051 if (ssl_check_serverhello_tlsext(s) <= 0) 1052 { 1053 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SERVERHELLO_TLSEXT); 1054 goto err; 1055 } 1056 } 1057#endif 1058 1059 if (p != (d+n)) 1060 { 1061 /* wrong packet length */ 1062 al=SSL_AD_DECODE_ERROR; 1063 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH); 1064 goto f_err; 1065 } 1066 1067 return(1); 1068f_err: 1069 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1070err: 1071 return(-1); 1072 } 1073 1074int ssl3_get_server_certificate(SSL *s) 1075 { 1076 int al,i,ok,ret= -1; 1077 unsigned long n,nc,llen,l; 1078 X509 *x=NULL; 1079 const unsigned char *q,*p; 1080 unsigned char *d; 1081 STACK_OF(X509) *sk=NULL; 1082 SESS_CERT *sc; 1083 EVP_PKEY *pkey=NULL; 1084 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */ 1085 1086 n=s->method->ssl_get_message(s, 1087 SSL3_ST_CR_CERT_A, 1088 SSL3_ST_CR_CERT_B, 1089 -1, 1090 s->max_cert_list, 1091 &ok); 1092 1093 if (!ok) return((int)n); 1094 1095 if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) || 1096 ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) && 1097 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE))) 1098 { 1099 s->s3->tmp.reuse_message=1; 1100 return(1); 1101 } 1102 1103 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE) 1104 { 1105 al=SSL_AD_UNEXPECTED_MESSAGE; 1106 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE); 1107 goto f_err; 1108 } 1109 p=d=(unsigned char *)s->init_msg; 1110 1111 if ((sk=sk_X509_new_null()) == NULL) 1112 { 1113 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE); 1114 goto err; 1115 } 1116 1117 n2l3(p,llen); 1118 if (llen+3 != n) 1119 { 1120 al=SSL_AD_DECODE_ERROR; 1121 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH); 1122 goto f_err; 1123 } 1124 for (nc=0; nc<llen; ) 1125 { 1126 n2l3(p,l); 1127 if ((l+nc+3) > llen) 1128 { 1129 al=SSL_AD_DECODE_ERROR; 1130 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); 1131 goto f_err; 1132 } 1133 1134 q=p; 1135 x=d2i_X509(NULL,&q,l); 1136 if (x == NULL) 1137 { 1138 al=SSL_AD_BAD_CERTIFICATE; 1139 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB); 1140 goto f_err; 1141 } 1142 if (q != (p+l)) 1143 { 1144 al=SSL_AD_DECODE_ERROR; 1145 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); 1146 goto f_err; 1147 } 1148 if (!sk_X509_push(sk,x)) 1149 { 1150 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE); 1151 goto err; 1152 } 1153 x=NULL; 1154 nc+=l+3; 1155 p=q; 1156 } 1157 1158 i=ssl_verify_cert_chain(s,sk); 1159 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0) 1160#ifndef OPENSSL_NO_KRB5 1161 && !((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) && 1162 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5)) 1163#endif /* OPENSSL_NO_KRB5 */ 1164 ) 1165 { 1166 al=ssl_verify_alarm_type(s->verify_result); 1167 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED); 1168 goto f_err; 1169 } 1170 ERR_clear_error(); /* but we keep s->verify_result */ 1171 1172 sc=ssl_sess_cert_new(); 1173 if (sc == NULL) goto err; 1174 1175 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert); 1176 s->session->sess_cert=sc; 1177 1178 sc->cert_chain=sk; 1179 /* Inconsistency alert: cert_chain does include the peer's 1180 * certificate, which we don't include in s3_srvr.c */ 1181 x=sk_X509_value(sk,0); 1182 sk=NULL; 1183 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/ 1184 1185 pkey=X509_get_pubkey(x); 1186 1187 /* VRS: allow null cert if auth == KRB5 */ 1188 need_cert = ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) && 1189 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5)) 1190 ? 0 : 1; 1191 1192#ifdef KSSL_DEBUG 1193 printf("pkey,x = %p, %p\n", pkey,x); 1194 printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey)); 1195 printf("cipher, alg, nc = %s, %lx, %lx, %d\n", s->s3->tmp.new_cipher->name, 1196 s->s3->tmp.new_cipher->algorithm_mkey, s->s3->tmp.new_cipher->algorithm_auth, need_cert); 1197#endif /* KSSL_DEBUG */ 1198 1199 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey))) 1200 { 1201 x=NULL; 1202 al=SSL3_AL_FATAL; 1203 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 1204 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); 1205 goto f_err; 1206 } 1207 1208 i=ssl_cert_type(x,pkey); 1209 if (need_cert && i < 0) 1210 { 1211 x=NULL; 1212 al=SSL3_AL_FATAL; 1213 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 1214 SSL_R_UNKNOWN_CERTIFICATE_TYPE); 1215 goto f_err; 1216 } 1217 1218 if (need_cert) 1219 { 1220 sc->peer_cert_type=i; 1221 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509); 1222 /* Why would the following ever happen? 1223 * We just created sc a couple of lines ago. */ 1224 if (sc->peer_pkeys[i].x509 != NULL) 1225 X509_free(sc->peer_pkeys[i].x509); 1226 sc->peer_pkeys[i].x509=x; 1227 sc->peer_key= &(sc->peer_pkeys[i]); 1228 1229 if (s->session->peer != NULL) 1230 X509_free(s->session->peer); 1231 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509); 1232 s->session->peer=x; 1233 } 1234 else 1235 { 1236 sc->peer_cert_type=i; 1237 sc->peer_key= NULL; 1238 1239 if (s->session->peer != NULL) 1240 X509_free(s->session->peer); 1241 s->session->peer=NULL; 1242 } 1243 s->session->verify_result = s->verify_result; 1244 1245 x=NULL; 1246 ret=1; 1247 1248 if (0) 1249 { 1250f_err: 1251 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1252 } 1253err: 1254 EVP_PKEY_free(pkey); 1255 X509_free(x); 1256 sk_X509_pop_free(sk,X509_free); 1257 return(ret); 1258 } 1259 1260int ssl3_get_key_exchange(SSL *s) 1261 { 1262#ifndef OPENSSL_NO_RSA 1263 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2]; 1264#endif 1265 EVP_MD_CTX md_ctx; 1266 unsigned char *param,*p; 1267 int al,i,j,param_len,ok; 1268 long n,alg_k,alg_a; 1269 EVP_PKEY *pkey=NULL; 1270 const EVP_MD *md = NULL; 1271#ifndef OPENSSL_NO_RSA 1272 RSA *rsa=NULL; 1273#endif 1274#ifndef OPENSSL_NO_DH 1275 DH *dh=NULL; 1276#endif 1277#ifndef OPENSSL_NO_ECDH 1278 EC_KEY *ecdh = NULL; 1279 BN_CTX *bn_ctx = NULL; 1280 EC_POINT *srvr_ecpoint = NULL; 1281 int curve_nid = 0; 1282 int encoded_pt_len = 0; 1283#endif 1284 1285 /* use same message size as in ssl3_get_certificate_request() 1286 * as ServerKeyExchange message may be skipped */ 1287 n=s->method->ssl_get_message(s, 1288 SSL3_ST_CR_KEY_EXCH_A, 1289 SSL3_ST_CR_KEY_EXCH_B, 1290 -1, 1291 s->max_cert_list, 1292 &ok); 1293 if (!ok) return((int)n); 1294 1295 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE) 1296 { 1297#ifndef OPENSSL_NO_PSK 1298 /* In plain PSK ciphersuite, ServerKeyExchange can be 1299 omitted if no identity hint is sent. Set 1300 session->sess_cert anyway to avoid problems 1301 later.*/ 1302 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK) 1303 { 1304 s->session->sess_cert=ssl_sess_cert_new(); 1305 if (s->ctx->psk_identity_hint) 1306 OPENSSL_free(s->ctx->psk_identity_hint); 1307 s->ctx->psk_identity_hint = NULL; 1308 } 1309#endif 1310 s->s3->tmp.reuse_message=1; 1311 return(1); 1312 } 1313 1314 param=p=(unsigned char *)s->init_msg; 1315 if (s->session->sess_cert != NULL) 1316 { 1317#ifndef OPENSSL_NO_RSA 1318 if (s->session->sess_cert->peer_rsa_tmp != NULL) 1319 { 1320 RSA_free(s->session->sess_cert->peer_rsa_tmp); 1321 s->session->sess_cert->peer_rsa_tmp=NULL; 1322 } 1323#endif 1324#ifndef OPENSSL_NO_DH 1325 if (s->session->sess_cert->peer_dh_tmp) 1326 { 1327 DH_free(s->session->sess_cert->peer_dh_tmp); 1328 s->session->sess_cert->peer_dh_tmp=NULL; 1329 } 1330#endif 1331#ifndef OPENSSL_NO_ECDH 1332 if (s->session->sess_cert->peer_ecdh_tmp) 1333 { 1334 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp); 1335 s->session->sess_cert->peer_ecdh_tmp=NULL; 1336 } 1337#endif 1338 } 1339 else 1340 { 1341 s->session->sess_cert=ssl_sess_cert_new(); 1342 } 1343 1344 param_len=0; 1345 alg_k=s->s3->tmp.new_cipher->algorithm_mkey; 1346 alg_a=s->s3->tmp.new_cipher->algorithm_auth; 1347 EVP_MD_CTX_init(&md_ctx); 1348 1349#ifndef OPENSSL_NO_PSK 1350 if (alg_k & SSL_kPSK) 1351 { 1352 char tmp_id_hint[PSK_MAX_IDENTITY_LEN+1]; 1353 1354 al=SSL_AD_HANDSHAKE_FAILURE; 1355 n2s(p,i); 1356 param_len=i+2; 1357 /* Store PSK identity hint for later use, hint is used 1358 * in ssl3_send_client_key_exchange. Assume that the 1359 * maximum length of a PSK identity hint can be as 1360 * long as the maximum length of a PSK identity. */ 1361 if (i > PSK_MAX_IDENTITY_LEN) 1362 { 1363 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1364 SSL_R_DATA_LENGTH_TOO_LONG); 1365 goto f_err; 1366 } 1367 if (param_len > n) 1368 { 1369 al=SSL_AD_DECODE_ERROR; 1370 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1371 SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH); 1372 goto f_err; 1373 } 1374 /* If received PSK identity hint contains NULL 1375 * characters, the hint is truncated from the first 1376 * NULL. p may not be ending with NULL, so create a 1377 * NULL-terminated string. */ 1378 memcpy(tmp_id_hint, p, i); 1379 memset(tmp_id_hint+i, 0, PSK_MAX_IDENTITY_LEN+1-i); 1380 if (s->ctx->psk_identity_hint != NULL) 1381 OPENSSL_free(s->ctx->psk_identity_hint); 1382 s->ctx->psk_identity_hint = BUF_strdup(tmp_id_hint); 1383 if (s->ctx->psk_identity_hint == NULL) 1384 { 1385 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); 1386 goto f_err; 1387 } 1388 1389 p+=i; 1390 n-=param_len; 1391 } 1392 else 1393#endif /* !OPENSSL_NO_PSK */ 1394#ifndef OPENSSL_NO_SRP 1395 if (alg_k & SSL_kSRP) 1396 { 1397 n2s(p,i); 1398 param_len=i+2; 1399 if (param_len > n) 1400 { 1401 al=SSL_AD_DECODE_ERROR; 1402 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_N_LENGTH); 1403 goto f_err; 1404 } 1405 if (!(s->srp_ctx.N=BN_bin2bn(p,i,NULL))) 1406 { 1407 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1408 goto err; 1409 } 1410 p+=i; 1411 1412 n2s(p,i); 1413 param_len+=i+2; 1414 if (param_len > n) 1415 { 1416 al=SSL_AD_DECODE_ERROR; 1417 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_G_LENGTH); 1418 goto f_err; 1419 } 1420 if (!(s->srp_ctx.g=BN_bin2bn(p,i,NULL))) 1421 { 1422 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1423 goto err; 1424 } 1425 p+=i; 1426 1427 i = (unsigned int)(p[0]); 1428 p++; 1429 param_len+=i+1; 1430 if (param_len > n) 1431 { 1432 al=SSL_AD_DECODE_ERROR; 1433 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_S_LENGTH); 1434 goto f_err; 1435 } 1436 if (!(s->srp_ctx.s=BN_bin2bn(p,i,NULL))) 1437 { 1438 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1439 goto err; 1440 } 1441 p+=i; 1442 1443 n2s(p,i); 1444 param_len+=i+2; 1445 if (param_len > n) 1446 { 1447 al=SSL_AD_DECODE_ERROR; 1448 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_B_LENGTH); 1449 goto f_err; 1450 } 1451 if (!(s->srp_ctx.B=BN_bin2bn(p,i,NULL))) 1452 { 1453 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1454 goto err; 1455 } 1456 p+=i; 1457 n-=param_len; 1458 1459/* We must check if there is a certificate */ 1460#ifndef OPENSSL_NO_RSA 1461 if (alg_a & SSL_aRSA) 1462 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1463#else 1464 if (0) 1465 ; 1466#endif 1467#ifndef OPENSSL_NO_DSA 1468 else if (alg_a & SSL_aDSS) 1469 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509); 1470#endif 1471 } 1472 else 1473#endif /* !OPENSSL_NO_SRP */ 1474#ifndef OPENSSL_NO_RSA 1475 if (alg_k & SSL_kRSA) 1476 { 1477 if ((rsa=RSA_new()) == NULL) 1478 { 1479 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1480 goto err; 1481 } 1482 n2s(p,i); 1483 param_len=i+2; 1484 if (param_len > n) 1485 { 1486 al=SSL_AD_DECODE_ERROR; 1487 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH); 1488 goto f_err; 1489 } 1490 if (!(rsa->n=BN_bin2bn(p,i,rsa->n))) 1491 { 1492 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1493 goto err; 1494 } 1495 p+=i; 1496 1497 n2s(p,i); 1498 param_len+=i+2; 1499 if (param_len > n) 1500 { 1501 al=SSL_AD_DECODE_ERROR; 1502 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH); 1503 goto f_err; 1504 } 1505 if (!(rsa->e=BN_bin2bn(p,i,rsa->e))) 1506 { 1507 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1508 goto err; 1509 } 1510 p+=i; 1511 n-=param_len; 1512 1513 /* this should be because we are using an export cipher */ 1514 if (alg_a & SSL_aRSA) 1515 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1516 else 1517 { 1518 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1519 goto err; 1520 } 1521 s->session->sess_cert->peer_rsa_tmp=rsa; 1522 rsa=NULL; 1523 } 1524#else /* OPENSSL_NO_RSA */ 1525 if (0) 1526 ; 1527#endif 1528#ifndef OPENSSL_NO_DH 1529 else if (alg_k & SSL_kEDH) 1530 { 1531 if ((dh=DH_new()) == NULL) 1532 { 1533 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB); 1534 goto err; 1535 } 1536 n2s(p,i); 1537 param_len=i+2; 1538 if (param_len > n) 1539 { 1540 al=SSL_AD_DECODE_ERROR; 1541 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH); 1542 goto f_err; 1543 } 1544 if (!(dh->p=BN_bin2bn(p,i,NULL))) 1545 { 1546 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1547 goto err; 1548 } 1549 p+=i; 1550 1551 n2s(p,i); 1552 param_len+=i+2; 1553 if (param_len > n) 1554 { 1555 al=SSL_AD_DECODE_ERROR; 1556 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH); 1557 goto f_err; 1558 } 1559 if (!(dh->g=BN_bin2bn(p,i,NULL))) 1560 { 1561 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1562 goto err; 1563 } 1564 p+=i; 1565 1566 n2s(p,i); 1567 param_len+=i+2; 1568 if (param_len > n) 1569 { 1570 al=SSL_AD_DECODE_ERROR; 1571 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH); 1572 goto f_err; 1573 } 1574 if (!(dh->pub_key=BN_bin2bn(p,i,NULL))) 1575 { 1576 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1577 goto err; 1578 } 1579 p+=i; 1580 n-=param_len; 1581 1582#ifndef OPENSSL_NO_RSA 1583 if (alg_a & SSL_aRSA) 1584 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1585#else 1586 if (0) 1587 ; 1588#endif 1589#ifndef OPENSSL_NO_DSA 1590 else if (alg_a & SSL_aDSS) 1591 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509); 1592#endif 1593 /* else anonymous DH, so no certificate or pkey. */ 1594 1595 s->session->sess_cert->peer_dh_tmp=dh; 1596 dh=NULL; 1597 } 1598 else if ((alg_k & SSL_kDHr) || (alg_k & SSL_kDHd)) 1599 { 1600 al=SSL_AD_ILLEGAL_PARAMETER; 1601 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER); 1602 goto f_err; 1603 } 1604#endif /* !OPENSSL_NO_DH */ 1605 1606#ifndef OPENSSL_NO_ECDH 1607 else if (alg_k & SSL_kEECDH) 1608 { 1609 EC_GROUP *ngroup; 1610 const EC_GROUP *group; 1611 1612 if ((ecdh=EC_KEY_new()) == NULL) 1613 { 1614 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1615 goto err; 1616 } 1617 1618 /* Extract elliptic curve parameters and the 1619 * server's ephemeral ECDH public key. 1620 * Keep accumulating lengths of various components in 1621 * param_len and make sure it never exceeds n. 1622 */ 1623 1624 /* XXX: For now we only support named (not generic) curves 1625 * and the ECParameters in this case is just three bytes. 1626 */ 1627 param_len=3; 1628 if ((param_len > n) || 1629 (*p != NAMED_CURVE_TYPE) || 1630 ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0)) 1631 { 1632 al=SSL_AD_INTERNAL_ERROR; 1633 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); 1634 goto f_err; 1635 } 1636 1637 ngroup = EC_GROUP_new_by_curve_name(curve_nid); 1638 if (ngroup == NULL) 1639 { 1640 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB); 1641 goto err; 1642 } 1643 if (EC_KEY_set_group(ecdh, ngroup) == 0) 1644 { 1645 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB); 1646 goto err; 1647 } 1648 EC_GROUP_free(ngroup); 1649 1650 group = EC_KEY_get0_group(ecdh); 1651 1652 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && 1653 (EC_GROUP_get_degree(group) > 163)) 1654 { 1655 al=SSL_AD_EXPORT_RESTRICTION; 1656 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER); 1657 goto f_err; 1658 } 1659 1660 p+=3; 1661 1662 /* Next, get the encoded ECPoint */ 1663 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) || 1664 ((bn_ctx = BN_CTX_new()) == NULL)) 1665 { 1666 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1667 goto err; 1668 } 1669 1670 encoded_pt_len = *p; /* length of encoded point */ 1671 p+=1; 1672 param_len += (1 + encoded_pt_len); 1673 if ((param_len > n) || 1674 (EC_POINT_oct2point(group, srvr_ecpoint, 1675 p, encoded_pt_len, bn_ctx) == 0)) 1676 { 1677 al=SSL_AD_DECODE_ERROR; 1678 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT); 1679 goto f_err; 1680 } 1681 1682 n-=param_len; 1683 p+=encoded_pt_len; 1684 1685 /* The ECC/TLS specification does not mention 1686 * the use of DSA to sign ECParameters in the server 1687 * key exchange message. We do support RSA and ECDSA. 1688 */ 1689 if (0) ; 1690#ifndef OPENSSL_NO_RSA 1691 else if (alg_a & SSL_aRSA) 1692 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1693#endif 1694#ifndef OPENSSL_NO_ECDSA 1695 else if (alg_a & SSL_aECDSA) 1696 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509); 1697#endif 1698 /* else anonymous ECDH, so no certificate or pkey. */ 1699 EC_KEY_set_public_key(ecdh, srvr_ecpoint); 1700 s->session->sess_cert->peer_ecdh_tmp=ecdh; 1701 ecdh=NULL; 1702 BN_CTX_free(bn_ctx); 1703 bn_ctx = NULL; 1704 EC_POINT_free(srvr_ecpoint); 1705 srvr_ecpoint = NULL; 1706 } 1707 else if (alg_k) 1708 { 1709 al=SSL_AD_UNEXPECTED_MESSAGE; 1710 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE); 1711 goto f_err; 1712 } 1713#endif /* !OPENSSL_NO_ECDH */ 1714 1715 1716 /* p points to the next byte, there are 'n' bytes left */ 1717 1718 /* if it was signed, check the signature */ 1719 if (pkey != NULL) 1720 { 1721 if (TLS1_get_version(s) >= TLS1_2_VERSION) 1722 { 1723 int sigalg = tls12_get_sigid(pkey); 1724 /* Should never happen */ 1725 if (sigalg == -1) 1726 { 1727 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1728 goto err; 1729 } 1730 /* Check key type is consistent with signature */ 1731 if (sigalg != (int)p[1]) 1732 { 1733 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_TYPE); 1734 al=SSL_AD_DECODE_ERROR; 1735 goto f_err; 1736 } 1737 md = tls12_get_hash(p[0]); 1738 if (md == NULL) 1739 { 1740 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNKNOWN_DIGEST); 1741 al=SSL_AD_DECODE_ERROR; 1742 goto f_err; 1743 } 1744#ifdef SSL_DEBUG 1745fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md)); 1746#endif 1747 p += 2; 1748 n -= 2; 1749 } 1750 else 1751 md = EVP_sha1(); 1752 1753 n2s(p,i); 1754 n-=2; 1755 j=EVP_PKEY_size(pkey); 1756 1757 if ((i != n) || (n > j) || (n <= 0)) 1758 { 1759 /* wrong packet length */ 1760 al=SSL_AD_DECODE_ERROR; 1761 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH); 1762 goto f_err; 1763 } 1764 1765#ifndef OPENSSL_NO_RSA 1766 if (pkey->type == EVP_PKEY_RSA && TLS1_get_version(s) < TLS1_2_VERSION) 1767 { 1768 int num; 1769 1770 j=0; 1771 q=md_buf; 1772 for (num=2; num > 0; num--) 1773 { 1774 EVP_MD_CTX_set_flags(&md_ctx, 1775 EVP_MD_CTX_FLAG_NON_FIPS_ALLOW); 1776 EVP_DigestInit_ex(&md_ctx,(num == 2) 1777 ?s->ctx->md5:s->ctx->sha1, NULL); 1778 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); 1779 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); 1780 EVP_DigestUpdate(&md_ctx,param,param_len); 1781 EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i); 1782 q+=i; 1783 j+=i; 1784 } 1785 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n, 1786 pkey->pkey.rsa); 1787 if (i < 0) 1788 { 1789 al=SSL_AD_DECRYPT_ERROR; 1790 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT); 1791 goto f_err; 1792 } 1793 if (i == 0) 1794 { 1795 /* bad signature */ 1796 al=SSL_AD_DECRYPT_ERROR; 1797 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE); 1798 goto f_err; 1799 } 1800 } 1801 else 1802#endif 1803 { 1804 EVP_VerifyInit_ex(&md_ctx, md, NULL); 1805 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); 1806 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); 1807 EVP_VerifyUpdate(&md_ctx,param,param_len); 1808 if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0) 1809 { 1810 /* bad signature */ 1811 al=SSL_AD_DECRYPT_ERROR; 1812 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE); 1813 goto f_err; 1814 } 1815 } 1816 } 1817 else 1818 { 1819 if (!(alg_a & SSL_aNULL) && !(alg_k & SSL_kPSK)) 1820 /* aNULL or kPSK do not need public keys */ 1821 { 1822 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1823 goto err; 1824 } 1825 /* still data left over */ 1826 if (n != 0) 1827 { 1828 al=SSL_AD_DECODE_ERROR; 1829 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE); 1830 goto f_err; 1831 } 1832 } 1833 EVP_PKEY_free(pkey); 1834 EVP_MD_CTX_cleanup(&md_ctx); 1835 return(1); 1836f_err: 1837 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1838err: 1839 EVP_PKEY_free(pkey); 1840#ifndef OPENSSL_NO_RSA 1841 if (rsa != NULL) 1842 RSA_free(rsa); 1843#endif 1844#ifndef OPENSSL_NO_DH 1845 if (dh != NULL) 1846 DH_free(dh); 1847#endif 1848#ifndef OPENSSL_NO_ECDH 1849 BN_CTX_free(bn_ctx); 1850 EC_POINT_free(srvr_ecpoint); 1851 if (ecdh != NULL) 1852 EC_KEY_free(ecdh); 1853#endif 1854 EVP_MD_CTX_cleanup(&md_ctx); 1855 return(-1); 1856 } 1857 1858int ssl3_get_certificate_request(SSL *s) 1859 { 1860 int ok,ret=0; 1861 unsigned long n,nc,l; 1862 unsigned int llen, ctype_num,i; 1863 X509_NAME *xn=NULL; 1864 const unsigned char *p,*q; 1865 unsigned char *d; 1866 STACK_OF(X509_NAME) *ca_sk=NULL; 1867 1868 n=s->method->ssl_get_message(s, 1869 SSL3_ST_CR_CERT_REQ_A, 1870 SSL3_ST_CR_CERT_REQ_B, 1871 -1, 1872 s->max_cert_list, 1873 &ok); 1874 1875 if (!ok) return((int)n); 1876 1877 s->s3->tmp.cert_req=0; 1878 1879 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE) 1880 { 1881 s->s3->tmp.reuse_message=1; 1882 /* If we get here we don't need any cached handshake records 1883 * as we wont be doing client auth. 1884 */ 1885 if (s->s3->handshake_buffer) 1886 { 1887 if (!ssl3_digest_cached_records(s)) 1888 goto err; 1889 } 1890 return(1); 1891 } 1892 1893 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST) 1894 { 1895 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 1896 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE); 1897 goto err; 1898 } 1899 1900 /* TLS does not like anon-DH with client cert */ 1901 if (s->version > SSL3_VERSION) 1902 { 1903 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) 1904 { 1905 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 1906 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER); 1907 goto err; 1908 } 1909 } 1910 1911 p=d=(unsigned char *)s->init_msg; 1912 1913 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL) 1914 { 1915 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE); 1916 goto err; 1917 } 1918 1919 /* get the certificate types */ 1920 ctype_num= *(p++); 1921 if (ctype_num > SSL3_CT_NUMBER) 1922 ctype_num=SSL3_CT_NUMBER; 1923 for (i=0; i<ctype_num; i++) 1924 s->s3->tmp.ctype[i]= p[i]; 1925 p+=ctype_num; 1926 if (TLS1_get_version(s) >= TLS1_2_VERSION) 1927 { 1928 n2s(p, llen); 1929 /* Check we have enough room for signature algorithms and 1930 * following length value. 1931 */ 1932 if ((unsigned long)(p - d + llen + 2) > n) 1933 { 1934 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1935 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_DATA_LENGTH_TOO_LONG); 1936 goto err; 1937 } 1938 if ((llen & 1) || !tls1_process_sigalgs(s, p, llen)) 1939 { 1940 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1941 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_SIGNATURE_ALGORITHMS_ERROR); 1942 goto err; 1943 } 1944 p += llen; 1945 } 1946 1947 /* get the CA RDNs */ 1948 n2s(p,llen); 1949#if 0 1950{ 1951FILE *out; 1952out=fopen("/tmp/vsign.der","w"); 1953fwrite(p,1,llen,out); 1954fclose(out); 1955} 1956#endif 1957 1958 if ((unsigned long)(p - d + llen) != n) 1959 { 1960 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1961 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH); 1962 goto err; 1963 } 1964 1965 for (nc=0; nc<llen; ) 1966 { 1967 n2s(p,l); 1968 if ((l+nc+2) > llen) 1969 { 1970 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG)) 1971 goto cont; /* netscape bugs */ 1972 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1973 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG); 1974 goto err; 1975 } 1976 1977 q=p; 1978 1979 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL) 1980 { 1981 /* If netscape tolerance is on, ignore errors */ 1982 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG) 1983 goto cont; 1984 else 1985 { 1986 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1987 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB); 1988 goto err; 1989 } 1990 } 1991 1992 if (q != (p+l)) 1993 { 1994 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1995 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH); 1996 goto err; 1997 } 1998 if (!sk_X509_NAME_push(ca_sk,xn)) 1999 { 2000 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE); 2001 goto err; 2002 } 2003 2004 p+=l; 2005 nc+=l+2; 2006 } 2007 2008 if (0) 2009 { 2010cont: 2011 ERR_clear_error(); 2012 } 2013 2014 /* we should setup a certificate to return.... */ 2015 s->s3->tmp.cert_req=1; 2016 s->s3->tmp.ctype_num=ctype_num; 2017 if (s->s3->tmp.ca_names != NULL) 2018 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free); 2019 s->s3->tmp.ca_names=ca_sk; 2020 ca_sk=NULL; 2021 2022 ret=1; 2023err: 2024 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free); 2025 return(ret); 2026 } 2027 2028static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b) 2029 { 2030 return(X509_NAME_cmp(*a,*b)); 2031 } 2032#ifndef OPENSSL_NO_TLSEXT 2033int ssl3_get_new_session_ticket(SSL *s) 2034 { 2035 int ok,al,ret=0, ticklen; 2036 long n; 2037 const unsigned char *p; 2038 unsigned char *d; 2039 2040 n=s->method->ssl_get_message(s, 2041 SSL3_ST_CR_SESSION_TICKET_A, 2042 SSL3_ST_CR_SESSION_TICKET_B, 2043 -1, 2044 16384, 2045 &ok); 2046 2047 if (!ok) 2048 return((int)n); 2049 2050 if (s->s3->tmp.message_type == SSL3_MT_FINISHED) 2051 { 2052 s->s3->tmp.reuse_message=1; 2053 return(1); 2054 } 2055 if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET) 2056 { 2057 al=SSL_AD_UNEXPECTED_MESSAGE; 2058 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_BAD_MESSAGE_TYPE); 2059 goto f_err; 2060 } 2061 if (n < 6) 2062 { 2063 /* need at least ticket_lifetime_hint + ticket length */ 2064 al = SSL_AD_DECODE_ERROR; 2065 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH); 2066 goto f_err; 2067 } 2068 2069 p=d=(unsigned char *)s->init_msg; 2070 n2l(p, s->session->tlsext_tick_lifetime_hint); 2071 n2s(p, ticklen); 2072 /* ticket_lifetime_hint + ticket_length + ticket */ 2073 if (ticklen + 6 != n) 2074 { 2075 al = SSL_AD_DECODE_ERROR; 2076 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH); 2077 goto f_err; 2078 } 2079 if (s->session->tlsext_tick) 2080 { 2081 OPENSSL_free(s->session->tlsext_tick); 2082 s->session->tlsext_ticklen = 0; 2083 } 2084 s->session->tlsext_tick = OPENSSL_malloc(ticklen); 2085 if (!s->session->tlsext_tick) 2086 { 2087 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE); 2088 goto err; 2089 } 2090 memcpy(s->session->tlsext_tick, p, ticklen); 2091 s->session->tlsext_ticklen = ticklen; 2092 /* There are two ways to detect a resumed ticket sesion. 2093 * One is to set an appropriate session ID and then the server 2094 * must return a match in ServerHello. This allows the normal 2095 * client session ID matching to work and we know much 2096 * earlier that the ticket has been accepted. 2097 * 2098 * The other way is to set zero length session ID when the 2099 * ticket is presented and rely on the handshake to determine 2100 * session resumption. 2101 * 2102 * We choose the former approach because this fits in with 2103 * assumptions elsewhere in OpenSSL. The session ID is set 2104 * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the 2105 * ticket. 2106 */ 2107 EVP_Digest(p, ticklen, 2108 s->session->session_id, &s->session->session_id_length, 2109#ifndef OPENSSL_NO_SHA256 2110 EVP_sha256(), NULL); 2111#else 2112 EVP_sha1(), NULL); 2113#endif 2114 ret=1; 2115 return(ret); 2116f_err: 2117 ssl3_send_alert(s,SSL3_AL_FATAL,al); 2118err: 2119 return(-1); 2120 } 2121 2122int ssl3_get_cert_status(SSL *s) 2123 { 2124 int ok, al; 2125 unsigned long resplen,n; 2126 const unsigned char *p; 2127 2128 n=s->method->ssl_get_message(s, 2129 SSL3_ST_CR_CERT_STATUS_A, 2130 SSL3_ST_CR_CERT_STATUS_B, 2131 SSL3_MT_CERTIFICATE_STATUS, 2132 16384, 2133 &ok); 2134 2135 if (!ok) return((int)n); 2136 if (n < 4) 2137 { 2138 /* need at least status type + length */ 2139 al = SSL_AD_DECODE_ERROR; 2140 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH); 2141 goto f_err; 2142 } 2143 p = (unsigned char *)s->init_msg; 2144 if (*p++ != TLSEXT_STATUSTYPE_ocsp) 2145 { 2146 al = SSL_AD_DECODE_ERROR; 2147 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_UNSUPPORTED_STATUS_TYPE); 2148 goto f_err; 2149 } 2150 n2l3(p, resplen); 2151 if (resplen + 4 != n) 2152 { 2153 al = SSL_AD_DECODE_ERROR; 2154 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH); 2155 goto f_err; 2156 } 2157 if (s->tlsext_ocsp_resp) 2158 OPENSSL_free(s->tlsext_ocsp_resp); 2159 s->tlsext_ocsp_resp = BUF_memdup(p, resplen); 2160 if (!s->tlsext_ocsp_resp) 2161 { 2162 al = SSL_AD_INTERNAL_ERROR; 2163 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE); 2164 goto f_err; 2165 } 2166 s->tlsext_ocsp_resplen = resplen; 2167 if (s->ctx->tlsext_status_cb) 2168 { 2169 int ret; 2170 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg); 2171 if (ret == 0) 2172 { 2173 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE; 2174 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_INVALID_STATUS_RESPONSE); 2175 goto f_err; 2176 } 2177 if (ret < 0) 2178 { 2179 al = SSL_AD_INTERNAL_ERROR; 2180 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE); 2181 goto f_err; 2182 } 2183 } 2184 return 1; 2185f_err: 2186 ssl3_send_alert(s,SSL3_AL_FATAL,al); 2187 return(-1); 2188 } 2189#endif 2190 2191int ssl3_get_server_done(SSL *s) 2192 { 2193 int ok,ret=0; 2194 long n; 2195 2196 n=s->method->ssl_get_message(s, 2197 SSL3_ST_CR_SRVR_DONE_A, 2198 SSL3_ST_CR_SRVR_DONE_B, 2199 SSL3_MT_SERVER_DONE, 2200 30, /* should be very small, like 0 :-) */ 2201 &ok); 2202 2203 if (!ok) return((int)n); 2204 if (n > 0) 2205 { 2206 /* should contain no data */ 2207 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 2208 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH); 2209 return -1; 2210 } 2211 ret=1; 2212 return(ret); 2213 } 2214 2215 2216int ssl3_send_client_key_exchange(SSL *s) 2217 { 2218 unsigned char *p,*d; 2219 int n; 2220 unsigned long alg_k; 2221#ifndef OPENSSL_NO_RSA 2222 unsigned char *q; 2223 EVP_PKEY *pkey=NULL; 2224#endif 2225#ifndef OPENSSL_NO_KRB5 2226 KSSL_ERR kssl_err; 2227#endif /* OPENSSL_NO_KRB5 */ 2228#ifndef OPENSSL_NO_ECDH 2229 EC_KEY *clnt_ecdh = NULL; 2230 const EC_POINT *srvr_ecpoint = NULL; 2231 EVP_PKEY *srvr_pub_pkey = NULL; 2232 unsigned char *encodedPoint = NULL; 2233 int encoded_pt_len = 0; 2234 BN_CTX * bn_ctx = NULL; 2235#endif 2236 2237 if (s->state == SSL3_ST_CW_KEY_EXCH_A) 2238 { 2239 d=(unsigned char *)s->init_buf->data; 2240 p= &(d[4]); 2241 2242 alg_k=s->s3->tmp.new_cipher->algorithm_mkey; 2243 2244 /* Fool emacs indentation */ 2245 if (0) {} 2246#ifndef OPENSSL_NO_RSA 2247 else if (alg_k & SSL_kRSA) 2248 { 2249 RSA *rsa; 2250 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; 2251 2252 if (s->session->sess_cert->peer_rsa_tmp != NULL) 2253 rsa=s->session->sess_cert->peer_rsa_tmp; 2254 else 2255 { 2256 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 2257 if ((pkey == NULL) || 2258 (pkey->type != EVP_PKEY_RSA) || 2259 (pkey->pkey.rsa == NULL)) 2260 { 2261 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 2262 goto err; 2263 } 2264 rsa=pkey->pkey.rsa; 2265 EVP_PKEY_free(pkey); 2266 } 2267 2268 tmp_buf[0]=s->client_version>>8; 2269 tmp_buf[1]=s->client_version&0xff; 2270 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0) 2271 goto err; 2272 2273 s->session->master_key_length=sizeof tmp_buf; 2274 2275 q=p; 2276 /* Fix buf for TLS and beyond */ 2277 if (s->version > SSL3_VERSION) 2278 p+=2; 2279 n=RSA_public_encrypt(sizeof tmp_buf, 2280 tmp_buf,p,rsa,RSA_PKCS1_PADDING); 2281#ifdef PKCS1_CHECK 2282 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++; 2283 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70; 2284#endif 2285 if (n <= 0) 2286 { 2287 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT); 2288 goto err; 2289 } 2290 2291 /* Fix buf for TLS and beyond */ 2292 if (s->version > SSL3_VERSION) 2293 { 2294 s2n(n,q); 2295 n+=2; 2296 } 2297 2298 s->session->master_key_length= 2299 s->method->ssl3_enc->generate_master_secret(s, 2300 s->session->master_key, 2301 tmp_buf,sizeof tmp_buf); 2302 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf); 2303 } 2304#endif 2305#ifndef OPENSSL_NO_KRB5 2306 else if (alg_k & SSL_kKRB5) 2307 { 2308 krb5_error_code krb5rc; 2309 KSSL_CTX *kssl_ctx = s->kssl_ctx; 2310 /* krb5_data krb5_ap_req; */ 2311 krb5_data *enc_ticket; 2312 krb5_data authenticator, *authp = NULL; 2313 EVP_CIPHER_CTX ciph_ctx; 2314 const EVP_CIPHER *enc = NULL; 2315 unsigned char iv[EVP_MAX_IV_LENGTH]; 2316 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; 2317 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH 2318 + EVP_MAX_IV_LENGTH]; 2319 int padl, outl = sizeof(epms); 2320 2321 EVP_CIPHER_CTX_init(&ciph_ctx); 2322 2323#ifdef KSSL_DEBUG 2324 printf("ssl3_send_client_key_exchange(%lx & %lx)\n", 2325 alg_k, SSL_kKRB5); 2326#endif /* KSSL_DEBUG */ 2327 2328 authp = NULL; 2329#ifdef KRB5SENDAUTH 2330 if (KRB5SENDAUTH) authp = &authenticator; 2331#endif /* KRB5SENDAUTH */ 2332 2333 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp, 2334 &kssl_err); 2335 enc = kssl_map_enc(kssl_ctx->enctype); 2336 if (enc == NULL) 2337 goto err; 2338#ifdef KSSL_DEBUG 2339 { 2340 printf("kssl_cget_tkt rtn %d\n", krb5rc); 2341 if (krb5rc && kssl_err.text) 2342 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text); 2343 } 2344#endif /* KSSL_DEBUG */ 2345 2346 if (krb5rc) 2347 { 2348 ssl3_send_alert(s,SSL3_AL_FATAL, 2349 SSL_AD_HANDSHAKE_FAILURE); 2350 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2351 kssl_err.reason); 2352 goto err; 2353 } 2354 2355 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ 2356 ** in place of RFC 2712 KerberosWrapper, as in: 2357 ** 2358 ** Send ticket (copy to *p, set n = length) 2359 ** n = krb5_ap_req.length; 2360 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length); 2361 ** if (krb5_ap_req.data) 2362 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req); 2363 ** 2364 ** Now using real RFC 2712 KerberosWrapper 2365 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>) 2366 ** Note: 2712 "opaque" types are here replaced 2367 ** with a 2-byte length followed by the value. 2368 ** Example: 2369 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms 2370 ** Where "xx xx" = length bytes. Shown here with 2371 ** optional authenticator omitted. 2372 */ 2373 2374 /* KerberosWrapper.Ticket */ 2375 s2n(enc_ticket->length,p); 2376 memcpy(p, enc_ticket->data, enc_ticket->length); 2377 p+= enc_ticket->length; 2378 n = enc_ticket->length + 2; 2379 2380 /* KerberosWrapper.Authenticator */ 2381 if (authp && authp->length) 2382 { 2383 s2n(authp->length,p); 2384 memcpy(p, authp->data, authp->length); 2385 p+= authp->length; 2386 n+= authp->length + 2; 2387 2388 free(authp->data); 2389 authp->data = NULL; 2390 authp->length = 0; 2391 } 2392 else 2393 { 2394 s2n(0,p);/* null authenticator length */ 2395 n+=2; 2396 } 2397 2398 tmp_buf[0]=s->client_version>>8; 2399 tmp_buf[1]=s->client_version&0xff; 2400 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0) 2401 goto err; 2402 2403 /* 20010420 VRS. Tried it this way; failed. 2404 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL); 2405 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx, 2406 ** kssl_ctx->length); 2407 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv); 2408 */ 2409 2410 memset(iv, 0, sizeof iv); /* per RFC 1510 */ 2411 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL, 2412 kssl_ctx->key,iv); 2413 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf, 2414 sizeof tmp_buf); 2415 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl); 2416 outl += padl; 2417 if (outl > (int)sizeof epms) 2418 { 2419 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); 2420 goto err; 2421 } 2422 EVP_CIPHER_CTX_cleanup(&ciph_ctx); 2423 2424 /* KerberosWrapper.EncryptedPreMasterSecret */ 2425 s2n(outl,p); 2426 memcpy(p, epms, outl); 2427 p+=outl; 2428 n+=outl + 2; 2429 2430 s->session->master_key_length= 2431 s->method->ssl3_enc->generate_master_secret(s, 2432 s->session->master_key, 2433 tmp_buf, sizeof tmp_buf); 2434 2435 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf); 2436 OPENSSL_cleanse(epms, outl); 2437 } 2438#endif 2439#ifndef OPENSSL_NO_DH 2440 else if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) 2441 { 2442 DH *dh_srvr,*dh_clnt; 2443 2444 if (s->session->sess_cert == NULL) 2445 { 2446 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 2447 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE); 2448 goto err; 2449 } 2450 2451 if (s->session->sess_cert->peer_dh_tmp != NULL) 2452 dh_srvr=s->session->sess_cert->peer_dh_tmp; 2453 else 2454 { 2455 /* we get them from the cert */ 2456 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); 2457 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS); 2458 goto err; 2459 } 2460 2461 /* generate a new random key */ 2462 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL) 2463 { 2464 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 2465 goto err; 2466 } 2467 if (!DH_generate_key(dh_clnt)) 2468 { 2469 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 2470 DH_free(dh_clnt); 2471 goto err; 2472 } 2473 2474 /* use the 'p' output buffer for the DH key, but 2475 * make sure to clear it out afterwards */ 2476 2477 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt); 2478 2479 if (n <= 0) 2480 { 2481 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 2482 DH_free(dh_clnt); 2483 goto err; 2484 } 2485 2486 /* generate master key from the result */ 2487 s->session->master_key_length= 2488 s->method->ssl3_enc->generate_master_secret(s, 2489 s->session->master_key,p,n); 2490 /* clean up */ 2491 memset(p,0,n); 2492 2493 /* send off the data */ 2494 n=BN_num_bytes(dh_clnt->pub_key); 2495 s2n(n,p); 2496 BN_bn2bin(dh_clnt->pub_key,p); 2497 n+=2; 2498 2499 DH_free(dh_clnt); 2500 2501 /* perhaps clean things up a bit EAY EAY EAY EAY*/ 2502 } 2503#endif 2504 2505#ifndef OPENSSL_NO_ECDH 2506 else if (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)) 2507 { 2508 const EC_GROUP *srvr_group = NULL; 2509 EC_KEY *tkey; 2510 int ecdh_clnt_cert = 0; 2511 int field_size = 0; 2512 2513 /* Did we send out the client's 2514 * ECDH share for use in premaster 2515 * computation as part of client certificate? 2516 * If so, set ecdh_clnt_cert to 1. 2517 */ 2518 if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL)) 2519 { 2520 /* XXX: For now, we do not support client 2521 * authentication using ECDH certificates. 2522 * To add such support, one needs to add 2523 * code that checks for appropriate 2524 * conditions and sets ecdh_clnt_cert to 1. 2525 * For example, the cert have an ECC 2526 * key on the same curve as the server's 2527 * and the key should be authorized for 2528 * key agreement. 2529 * 2530 * One also needs to add code in ssl3_connect 2531 * to skip sending the certificate verify 2532 * message. 2533 * 2534 * if ((s->cert->key->privatekey != NULL) && 2535 * (s->cert->key->privatekey->type == 2536 * EVP_PKEY_EC) && ...) 2537 * ecdh_clnt_cert = 1; 2538 */ 2539 } 2540 2541 if (s->session->sess_cert->peer_ecdh_tmp != NULL) 2542 { 2543 tkey = s->session->sess_cert->peer_ecdh_tmp; 2544 } 2545 else 2546 { 2547 /* Get the Server Public Key from Cert */ 2548 srvr_pub_pkey = X509_get_pubkey(s->session-> \ 2549 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509); 2550 if ((srvr_pub_pkey == NULL) || 2551 (srvr_pub_pkey->type != EVP_PKEY_EC) || 2552 (srvr_pub_pkey->pkey.ec == NULL)) 2553 { 2554 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2555 ERR_R_INTERNAL_ERROR); 2556 goto err; 2557 } 2558 2559 tkey = srvr_pub_pkey->pkey.ec; 2560 } 2561 2562 srvr_group = EC_KEY_get0_group(tkey); 2563 srvr_ecpoint = EC_KEY_get0_public_key(tkey); 2564 2565 if ((srvr_group == NULL) || (srvr_ecpoint == NULL)) 2566 { 2567 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2568 ERR_R_INTERNAL_ERROR); 2569 goto err; 2570 } 2571 2572 if ((clnt_ecdh=EC_KEY_new()) == NULL) 2573 { 2574 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2575 goto err; 2576 } 2577 2578 if (!EC_KEY_set_group(clnt_ecdh, srvr_group)) 2579 { 2580 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB); 2581 goto err; 2582 } 2583 if (ecdh_clnt_cert) 2584 { 2585 /* Reuse key info from our certificate 2586 * We only need our private key to perform 2587 * the ECDH computation. 2588 */ 2589 const BIGNUM *priv_key; 2590 tkey = s->cert->key->privatekey->pkey.ec; 2591 priv_key = EC_KEY_get0_private_key(tkey); 2592 if (priv_key == NULL) 2593 { 2594 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2595 goto err; 2596 } 2597 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key)) 2598 { 2599 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB); 2600 goto err; 2601 } 2602 } 2603 else 2604 { 2605 /* Generate a new ECDH key pair */ 2606 if (!(EC_KEY_generate_key(clnt_ecdh))) 2607 { 2608 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB); 2609 goto err; 2610 } 2611 } 2612 2613 /* use the 'p' output buffer for the ECDH key, but 2614 * make sure to clear it out afterwards 2615 */ 2616 2617 field_size = EC_GROUP_get_degree(srvr_group); 2618 if (field_size <= 0) 2619 { 2620 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2621 ERR_R_ECDH_LIB); 2622 goto err; 2623 } 2624 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL); 2625 if (n <= 0) 2626 { 2627 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2628 ERR_R_ECDH_LIB); 2629 goto err; 2630 } 2631 2632 /* generate master key from the result */ 2633 s->session->master_key_length = s->method->ssl3_enc \ 2634 -> generate_master_secret(s, 2635 s->session->master_key, 2636 p, n); 2637 2638 memset(p, 0, n); /* clean up */ 2639 2640 if (ecdh_clnt_cert) 2641 { 2642 /* Send empty client key exch message */ 2643 n = 0; 2644 } 2645 else 2646 { 2647 /* First check the size of encoding and 2648 * allocate memory accordingly. 2649 */ 2650 encoded_pt_len = 2651 EC_POINT_point2oct(srvr_group, 2652 EC_KEY_get0_public_key(clnt_ecdh), 2653 POINT_CONVERSION_UNCOMPRESSED, 2654 NULL, 0, NULL); 2655 2656 encodedPoint = (unsigned char *) 2657 OPENSSL_malloc(encoded_pt_len * 2658 sizeof(unsigned char)); 2659 bn_ctx = BN_CTX_new(); 2660 if ((encodedPoint == NULL) || 2661 (bn_ctx == NULL)) 2662 { 2663 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2664 goto err; 2665 } 2666 2667 /* Encode the public key */ 2668 n = EC_POINT_point2oct(srvr_group, 2669 EC_KEY_get0_public_key(clnt_ecdh), 2670 POINT_CONVERSION_UNCOMPRESSED, 2671 encodedPoint, encoded_pt_len, bn_ctx); 2672 2673 *p = n; /* length of encoded point */ 2674 /* Encoded point will be copied here */ 2675 p += 1; 2676 /* copy the point */ 2677 memcpy((unsigned char *)p, encodedPoint, n); 2678 /* increment n to account for length field */ 2679 n += 1; 2680 } 2681 2682 /* Free allocated memory */ 2683 BN_CTX_free(bn_ctx); 2684 if (encodedPoint != NULL) OPENSSL_free(encodedPoint); 2685 if (clnt_ecdh != NULL) 2686 EC_KEY_free(clnt_ecdh); 2687 EVP_PKEY_free(srvr_pub_pkey); 2688 } 2689#endif /* !OPENSSL_NO_ECDH */ 2690 else if (alg_k & SSL_kGOST) 2691 { 2692 /* GOST key exchange message creation */ 2693 EVP_PKEY_CTX *pkey_ctx; 2694 X509 *peer_cert; 2695 size_t msglen; 2696 unsigned int md_len; 2697 int keytype; 2698 unsigned char premaster_secret[32],shared_ukm[32], tmp[256]; 2699 EVP_MD_CTX *ukm_hash; 2700 EVP_PKEY *pub_key; 2701 2702 /* Get server sertificate PKEY and create ctx from it */ 2703 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST01)].x509; 2704 if (!peer_cert) 2705 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST94)].x509; 2706 if (!peer_cert) { 2707 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER); 2708 goto err; 2709 } 2710 2711 pkey_ctx=EVP_PKEY_CTX_new(pub_key=X509_get_pubkey(peer_cert),NULL); 2712 /* If we have send a certificate, and certificate key 2713 2714 * parameters match those of server certificate, use 2715 * certificate key for key exchange 2716 */ 2717 2718 /* Otherwise, generate ephemeral key pair */ 2719 2720 EVP_PKEY_encrypt_init(pkey_ctx); 2721 /* Generate session key */ 2722 RAND_bytes(premaster_secret,32); 2723 /* If we have client certificate, use its secret as peer key */ 2724 if (s->s3->tmp.cert_req && s->cert->key->privatekey) { 2725 if (EVP_PKEY_derive_set_peer(pkey_ctx,s->cert->key->privatekey) <=0) { 2726 /* If there was an error - just ignore it. Ephemeral key 2727 * would be used 2728 */ 2729 ERR_clear_error(); 2730 } 2731 } 2732 /* Compute shared IV and store it in algorithm-specific 2733 * context data */ 2734 ukm_hash = EVP_MD_CTX_create(); 2735 EVP_DigestInit(ukm_hash,EVP_get_digestbynid(NID_id_GostR3411_94)); 2736 EVP_DigestUpdate(ukm_hash,s->s3->client_random,SSL3_RANDOM_SIZE); 2737 EVP_DigestUpdate(ukm_hash,s->s3->server_random,SSL3_RANDOM_SIZE); 2738 EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len); 2739 EVP_MD_CTX_destroy(ukm_hash); 2740 if (EVP_PKEY_CTX_ctrl(pkey_ctx,-1,EVP_PKEY_OP_ENCRYPT,EVP_PKEY_CTRL_SET_IV, 2741 8,shared_ukm)<0) { 2742 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2743 SSL_R_LIBRARY_BUG); 2744 goto err; 2745 } 2746 /* Make GOST keytransport blob message */ 2747 /*Encapsulate it into sequence */ 2748 *(p++)=V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED; 2749 msglen=255; 2750 if (EVP_PKEY_encrypt(pkey_ctx,tmp,&msglen,premaster_secret,32)<0) { 2751 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2752 SSL_R_LIBRARY_BUG); 2753 goto err; 2754 } 2755 if (msglen >= 0x80) 2756 { 2757 *(p++)=0x81; 2758 *(p++)= msglen & 0xff; 2759 n=msglen+3; 2760 } 2761 else 2762 { 2763 *(p++)= msglen & 0xff; 2764 n=msglen+2; 2765 } 2766 memcpy(p, tmp, msglen); 2767 /* Check if pubkey from client certificate was used */ 2768 if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0) 2769 { 2770 /* Set flag "skip certificate verify" */ 2771 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY; 2772 } 2773 EVP_PKEY_CTX_free(pkey_ctx); 2774 s->session->master_key_length= 2775 s->method->ssl3_enc->generate_master_secret(s, 2776 s->session->master_key,premaster_secret,32); 2777 EVP_PKEY_free(pub_key); 2778 2779 } 2780#ifndef OPENSSL_NO_SRP 2781 else if (alg_k & SSL_kSRP) 2782 { 2783 if (s->srp_ctx.A != NULL) 2784 { 2785 /* send off the data */ 2786 n=BN_num_bytes(s->srp_ctx.A); 2787 s2n(n,p); 2788 BN_bn2bin(s->srp_ctx.A,p); 2789 n+=2; 2790 } 2791 else 2792 { 2793 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 2794 goto err; 2795 } 2796 if (s->session->srp_username != NULL) 2797 OPENSSL_free(s->session->srp_username); 2798 s->session->srp_username = BUF_strdup(s->srp_ctx.login); 2799 if (s->session->srp_username == NULL) 2800 { 2801 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2802 ERR_R_MALLOC_FAILURE); 2803 goto err; 2804 } 2805 2806 if ((s->session->master_key_length = SRP_generate_client_master_secret(s,s->session->master_key))<0) 2807 { 2808 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 2809 goto err; 2810 } 2811 } 2812#endif 2813#ifndef OPENSSL_NO_PSK 2814 else if (alg_k & SSL_kPSK) 2815 { 2816 char identity[PSK_MAX_IDENTITY_LEN]; 2817 unsigned char *t = NULL; 2818 unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4]; 2819 unsigned int pre_ms_len = 0, psk_len = 0; 2820 int psk_err = 1; 2821 2822 n = 0; 2823 if (s->psk_client_callback == NULL) 2824 { 2825 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2826 SSL_R_PSK_NO_CLIENT_CB); 2827 goto err; 2828 } 2829 2830 psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint, 2831 identity, PSK_MAX_IDENTITY_LEN, 2832 psk_or_pre_ms, sizeof(psk_or_pre_ms)); 2833 if (psk_len > PSK_MAX_PSK_LEN) 2834 { 2835 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2836 ERR_R_INTERNAL_ERROR); 2837 goto psk_err; 2838 } 2839 else if (psk_len == 0) 2840 { 2841 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2842 SSL_R_PSK_IDENTITY_NOT_FOUND); 2843 goto psk_err; 2844 } 2845 2846 /* create PSK pre_master_secret */ 2847 pre_ms_len = 2+psk_len+2+psk_len; 2848 t = psk_or_pre_ms; 2849 memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len); 2850 s2n(psk_len, t); 2851 memset(t, 0, psk_len); 2852 t+=psk_len; 2853 s2n(psk_len, t); 2854 2855 if (s->session->psk_identity_hint != NULL) 2856 OPENSSL_free(s->session->psk_identity_hint); 2857 s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint); 2858 if (s->ctx->psk_identity_hint != NULL && 2859 s->session->psk_identity_hint == NULL) 2860 { 2861 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2862 ERR_R_MALLOC_FAILURE); 2863 goto psk_err; 2864 } 2865 2866 if (s->session->psk_identity != NULL) 2867 OPENSSL_free(s->session->psk_identity); 2868 s->session->psk_identity = BUF_strdup(identity); 2869 if (s->session->psk_identity == NULL) 2870 { 2871 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2872 ERR_R_MALLOC_FAILURE); 2873 goto psk_err; 2874 } 2875 2876 s->session->master_key_length = 2877 s->method->ssl3_enc->generate_master_secret(s, 2878 s->session->master_key, 2879 psk_or_pre_ms, pre_ms_len); 2880 n = strlen(identity); 2881 s2n(n, p); 2882 memcpy(p, identity, n); 2883 n+=2; 2884 psk_err = 0; 2885 psk_err: 2886 OPENSSL_cleanse(identity, PSK_MAX_IDENTITY_LEN); 2887 OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms)); 2888 if (psk_err != 0) 2889 { 2890 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); 2891 goto err; 2892 } 2893 } 2894#endif 2895 else 2896 { 2897 ssl3_send_alert(s, SSL3_AL_FATAL, 2898 SSL_AD_HANDSHAKE_FAILURE); 2899 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2900 ERR_R_INTERNAL_ERROR); 2901 goto err; 2902 } 2903 2904 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE; 2905 l2n3(n,d); 2906 2907 s->state=SSL3_ST_CW_KEY_EXCH_B; 2908 /* number of bytes to write */ 2909 s->init_num=n+4; 2910 s->init_off=0; 2911 } 2912 2913 /* SSL3_ST_CW_KEY_EXCH_B */ 2914 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 2915err: 2916#ifndef OPENSSL_NO_ECDH 2917 BN_CTX_free(bn_ctx); 2918 if (encodedPoint != NULL) OPENSSL_free(encodedPoint); 2919 if (clnt_ecdh != NULL) 2920 EC_KEY_free(clnt_ecdh); 2921 EVP_PKEY_free(srvr_pub_pkey); 2922#endif 2923 return(-1); 2924 } 2925 2926int ssl3_send_client_verify(SSL *s) 2927 { 2928 unsigned char *p,*d; 2929 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH]; 2930 EVP_PKEY *pkey; 2931 EVP_PKEY_CTX *pctx=NULL; 2932 EVP_MD_CTX mctx; 2933 unsigned u=0; 2934 unsigned long n; 2935 int j; 2936 2937 EVP_MD_CTX_init(&mctx); 2938 2939 if (s->state == SSL3_ST_CW_CERT_VRFY_A) 2940 { 2941 d=(unsigned char *)s->init_buf->data; 2942 p= &(d[4]); 2943 pkey=s->cert->key->privatekey; 2944/* Create context from key and test if sha1 is allowed as digest */ 2945 pctx = EVP_PKEY_CTX_new(pkey,NULL); 2946 EVP_PKEY_sign_init(pctx); 2947 if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1())>0) 2948 { 2949 if (TLS1_get_version(s) < TLS1_2_VERSION) 2950 s->method->ssl3_enc->cert_verify_mac(s, 2951 NID_sha1, 2952 &(data[MD5_DIGEST_LENGTH])); 2953 } 2954 else 2955 { 2956 ERR_clear_error(); 2957 } 2958 /* For TLS v1.2 send signature algorithm and signature 2959 * using agreed digest and cached handshake records. 2960 */ 2961 if (TLS1_get_version(s) >= TLS1_2_VERSION) 2962 { 2963 long hdatalen = 0; 2964 void *hdata; 2965 const EVP_MD *md = s->cert->key->digest; 2966 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, 2967 &hdata); 2968 if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md)) 2969 { 2970 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, 2971 ERR_R_INTERNAL_ERROR); 2972 goto err; 2973 } 2974 p += 2; 2975#ifdef SSL_DEBUG 2976 fprintf(stderr, "Using TLS 1.2 with client alg %s\n", 2977 EVP_MD_name(md)); 2978#endif 2979 if (!EVP_SignInit_ex(&mctx, md, NULL) 2980 || !EVP_SignUpdate(&mctx, hdata, hdatalen) 2981 || !EVP_SignFinal(&mctx, p + 2, &u, pkey)) 2982 { 2983 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, 2984 ERR_R_EVP_LIB); 2985 goto err; 2986 } 2987 s2n(u,p); 2988 n = u + 4; 2989 if (!ssl3_digest_cached_records(s)) 2990 goto err; 2991 } 2992 else 2993#ifndef OPENSSL_NO_RSA 2994 if (pkey->type == EVP_PKEY_RSA) 2995 { 2996 s->method->ssl3_enc->cert_verify_mac(s, 2997 NID_md5, 2998 &(data[0])); 2999 if (RSA_sign(NID_md5_sha1, data, 3000 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH, 3001 &(p[2]), &u, pkey->pkey.rsa) <= 0 ) 3002 { 3003 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB); 3004 goto err; 3005 } 3006 s2n(u,p); 3007 n=u+2; 3008 } 3009 else 3010#endif 3011#ifndef OPENSSL_NO_DSA 3012 if (pkey->type == EVP_PKEY_DSA) 3013 { 3014 if (!DSA_sign(pkey->save_type, 3015 &(data[MD5_DIGEST_LENGTH]), 3016 SHA_DIGEST_LENGTH,&(p[2]), 3017 (unsigned int *)&j,pkey->pkey.dsa)) 3018 { 3019 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB); 3020 goto err; 3021 } 3022 s2n(j,p); 3023 n=j+2; 3024 } 3025 else 3026#endif 3027#ifndef OPENSSL_NO_ECDSA 3028 if (pkey->type == EVP_PKEY_EC) 3029 { 3030 if (!ECDSA_sign(pkey->save_type, 3031 &(data[MD5_DIGEST_LENGTH]), 3032 SHA_DIGEST_LENGTH,&(p[2]), 3033 (unsigned int *)&j,pkey->pkey.ec)) 3034 { 3035 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, 3036 ERR_R_ECDSA_LIB); 3037 goto err; 3038 } 3039 s2n(j,p); 3040 n=j+2; 3041 } 3042 else 3043#endif 3044 if (pkey->type == NID_id_GostR3410_94 || pkey->type == NID_id_GostR3410_2001) 3045 { 3046 unsigned char signbuf[64]; 3047 int i; 3048 size_t sigsize=64; 3049 s->method->ssl3_enc->cert_verify_mac(s, 3050 NID_id_GostR3411_94, 3051 data); 3052 if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) { 3053 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, 3054 ERR_R_INTERNAL_ERROR); 3055 goto err; 3056 } 3057 for (i=63,j=0; i>=0; j++, i--) { 3058 p[2+j]=signbuf[i]; 3059 } 3060 s2n(j,p); 3061 n=j+2; 3062 } 3063 else 3064 { 3065 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR); 3066 goto err; 3067 } 3068 *(d++)=SSL3_MT_CERTIFICATE_VERIFY; 3069 l2n3(n,d); 3070 3071 s->state=SSL3_ST_CW_CERT_VRFY_B; 3072 s->init_num=(int)n+4; 3073 s->init_off=0; 3074 } 3075 EVP_MD_CTX_cleanup(&mctx); 3076 EVP_PKEY_CTX_free(pctx); 3077 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 3078err: 3079 EVP_MD_CTX_cleanup(&mctx); 3080 EVP_PKEY_CTX_free(pctx); 3081 return(-1); 3082 } 3083 3084int ssl3_send_client_certificate(SSL *s) 3085 { 3086 X509 *x509=NULL; 3087 EVP_PKEY *pkey=NULL; 3088 int i; 3089 unsigned long l; 3090 3091 if (s->state == SSL3_ST_CW_CERT_A) 3092 { 3093 if ((s->cert == NULL) || 3094 (s->cert->key->x509 == NULL) || 3095 (s->cert->key->privatekey == NULL)) 3096 s->state=SSL3_ST_CW_CERT_B; 3097 else 3098 s->state=SSL3_ST_CW_CERT_C; 3099 } 3100 3101 /* We need to get a client cert */ 3102 if (s->state == SSL3_ST_CW_CERT_B) 3103 { 3104 /* If we get an error, we need to 3105 * ssl->rwstate=SSL_X509_LOOKUP; return(-1); 3106 * We then get retied later */ 3107 i=0; 3108 i = ssl_do_client_cert_cb(s, &x509, &pkey); 3109 if (i < 0) 3110 { 3111 s->rwstate=SSL_X509_LOOKUP; 3112 return(-1); 3113 } 3114 s->rwstate=SSL_NOTHING; 3115 if ((i == 1) && (pkey != NULL) && (x509 != NULL)) 3116 { 3117 s->state=SSL3_ST_CW_CERT_B; 3118 if ( !SSL_use_certificate(s,x509) || 3119 !SSL_use_PrivateKey(s,pkey)) 3120 i=0; 3121 } 3122 else if (i == 1) 3123 { 3124 i=0; 3125 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); 3126 } 3127 3128 if (x509 != NULL) X509_free(x509); 3129 if (pkey != NULL) EVP_PKEY_free(pkey); 3130 if (i == 0) 3131 { 3132 if (s->version == SSL3_VERSION) 3133 { 3134 s->s3->tmp.cert_req=0; 3135 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE); 3136 return(1); 3137 } 3138 else 3139 { 3140 s->s3->tmp.cert_req=2; 3141 } 3142 } 3143 3144 /* Ok, we have a cert */ 3145 s->state=SSL3_ST_CW_CERT_C; 3146 } 3147 3148 if (s->state == SSL3_ST_CW_CERT_C) 3149 { 3150 s->state=SSL3_ST_CW_CERT_D; 3151 l=ssl3_output_cert_chain(s, 3152 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509); 3153 s->init_num=(int)l; 3154 s->init_off=0; 3155 } 3156 /* SSL3_ST_CW_CERT_D */ 3157 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 3158 } 3159 3160#define has_bits(i,m) (((i)&(m)) == (m)) 3161 3162int ssl3_check_cert_and_algorithm(SSL *s) 3163 { 3164 int i,idx; 3165 long alg_k,alg_a; 3166 EVP_PKEY *pkey=NULL; 3167 SESS_CERT *sc; 3168#ifndef OPENSSL_NO_RSA 3169 RSA *rsa; 3170#endif 3171#ifndef OPENSSL_NO_DH 3172 DH *dh; 3173#endif 3174 3175 alg_k=s->s3->tmp.new_cipher->algorithm_mkey; 3176 alg_a=s->s3->tmp.new_cipher->algorithm_auth; 3177 3178 /* we don't have a certificate */ 3179 if ((alg_a & (SSL_aDH|SSL_aNULL|SSL_aKRB5)) || (alg_k & SSL_kPSK)) 3180 return(1); 3181 3182 sc=s->session->sess_cert; 3183 if (sc == NULL) 3184 { 3185 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR); 3186 goto err; 3187 } 3188 3189#ifndef OPENSSL_NO_RSA 3190 rsa=s->session->sess_cert->peer_rsa_tmp; 3191#endif 3192#ifndef OPENSSL_NO_DH 3193 dh=s->session->sess_cert->peer_dh_tmp; 3194#endif 3195 3196 /* This is the passed certificate */ 3197 3198 idx=sc->peer_cert_type; 3199#ifndef OPENSSL_NO_ECDH 3200 if (idx == SSL_PKEY_ECC) 3201 { 3202 if (ssl_check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509, 3203 s) == 0) 3204 { /* check failed */ 3205 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT); 3206 goto f_err; 3207 } 3208 else 3209 { 3210 return 1; 3211 } 3212 } 3213#endif 3214 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509); 3215 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey); 3216 EVP_PKEY_free(pkey); 3217 3218 3219 /* Check that we have a certificate if we require one */ 3220 if ((alg_a & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN)) 3221 { 3222 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT); 3223 goto f_err; 3224 } 3225#ifndef OPENSSL_NO_DSA 3226 else if ((alg_a & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN)) 3227 { 3228 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT); 3229 goto f_err; 3230 } 3231#endif 3232#ifndef OPENSSL_NO_RSA 3233 if ((alg_k & SSL_kRSA) && 3234 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL))) 3235 { 3236 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT); 3237 goto f_err; 3238 } 3239#endif 3240#ifndef OPENSSL_NO_DH 3241 if ((alg_k & SSL_kEDH) && 3242 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL))) 3243 { 3244 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY); 3245 goto f_err; 3246 } 3247 else if ((alg_k & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA)) 3248 { 3249 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT); 3250 goto f_err; 3251 } 3252#ifndef OPENSSL_NO_DSA 3253 else if ((alg_k & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA)) 3254 { 3255 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT); 3256 goto f_err; 3257 } 3258#endif 3259#endif 3260 3261 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP)) 3262 { 3263#ifndef OPENSSL_NO_RSA 3264 if (alg_k & SSL_kRSA) 3265 { 3266 if (rsa == NULL 3267 || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) 3268 { 3269 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY); 3270 goto f_err; 3271 } 3272 } 3273 else 3274#endif 3275#ifndef OPENSSL_NO_DH 3276 if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) 3277 { 3278 if (dh == NULL 3279 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) 3280 { 3281 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY); 3282 goto f_err; 3283 } 3284 } 3285 else 3286#endif 3287 { 3288 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE); 3289 goto f_err; 3290 } 3291 } 3292 return(1); 3293f_err: 3294 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); 3295err: 3296 return(0); 3297 } 3298 3299#if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG) 3300int ssl3_send_next_proto(SSL *s) 3301 { 3302 unsigned int len, padding_len; 3303 unsigned char *d; 3304 3305 if (s->state == SSL3_ST_CW_NEXT_PROTO_A) 3306 { 3307 len = s->next_proto_negotiated_len; 3308 padding_len = 32 - ((len + 2) % 32); 3309 d = (unsigned char *)s->init_buf->data; 3310 d[4] = len; 3311 memcpy(d + 5, s->next_proto_negotiated, len); 3312 d[5 + len] = padding_len; 3313 memset(d + 6 + len, 0, padding_len); 3314 *(d++)=SSL3_MT_NEXT_PROTO; 3315 l2n3(2 + len + padding_len, d); 3316 s->state = SSL3_ST_CW_NEXT_PROTO_B; 3317 s->init_num = 4 + 2 + len + padding_len; 3318 s->init_off = 0; 3319 } 3320 3321 return ssl3_do_write(s, SSL3_RT_HANDSHAKE); 3322} 3323#endif /* !OPENSSL_NO_TLSEXT && !OPENSSL_NO_NEXTPROTONEG */ 3324 3325/* Check to see if handshake is full or resumed. Usually this is just a 3326 * case of checking to see if a cache hit has occurred. In the case of 3327 * session tickets we have to check the next message to be sure. 3328 */ 3329 3330#ifndef OPENSSL_NO_TLSEXT 3331int ssl3_check_finished(SSL *s) 3332 { 3333 int ok; 3334 long n; 3335 /* If we have no ticket it cannot be a resumed session. */ 3336 if (!s->session->tlsext_tick) 3337 return 1; 3338 /* this function is called when we really expect a Certificate 3339 * message, so permit appropriate message length */ 3340 n=s->method->ssl_get_message(s, 3341 SSL3_ST_CR_CERT_A, 3342 SSL3_ST_CR_CERT_B, 3343 -1, 3344 s->max_cert_list, 3345 &ok); 3346 if (!ok) return((int)n); 3347 s->s3->tmp.reuse_message = 1; 3348 if ((s->s3->tmp.message_type == SSL3_MT_FINISHED) 3349 || (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET)) 3350 return 2; 3351 3352 return 1; 3353 } 3354#endif 3355 3356int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey) 3357 { 3358 int i = 0; 3359#ifndef OPENSSL_NO_ENGINE 3360 if (s->ctx->client_cert_engine) 3361 { 3362 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s, 3363 SSL_get_client_CA_list(s), 3364 px509, ppkey, NULL, NULL, NULL); 3365 if (i != 0) 3366 return i; 3367 } 3368#endif 3369 if (s->ctx->client_cert_cb) 3370 i = s->ctx->client_cert_cb(s,px509,ppkey); 3371 return i; 3372 } 3373