s3_clnt.c revision 269686
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->s3->flags |= SSL3_FLAGS_CCS_OK; 514 s->state=SSL3_ST_CW_FLUSH; 515 516 /* clear flags */ 517 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER; 518 if (s->hit) 519 { 520 s->s3->tmp.next_state=SSL_ST_OK; 521 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED) 522 { 523 s->state=SSL_ST_OK; 524 s->s3->flags|=SSL3_FLAGS_POP_BUFFER; 525 s->s3->delay_buf_pop_ret=0; 526 } 527 } 528 else 529 { 530#ifndef OPENSSL_NO_TLSEXT 531 /* Allow NewSessionTicket if ticket expected */ 532 if (s->tlsext_ticket_expected) 533 s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A; 534 else 535#endif 536 537 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A; 538 } 539 s->init_num=0; 540 break; 541 542#ifndef OPENSSL_NO_TLSEXT 543 case SSL3_ST_CR_SESSION_TICKET_A: 544 case SSL3_ST_CR_SESSION_TICKET_B: 545 ret=ssl3_get_new_session_ticket(s); 546 if (ret <= 0) goto end; 547 s->state=SSL3_ST_CR_FINISHED_A; 548 s->init_num=0; 549 break; 550 551 case SSL3_ST_CR_CERT_STATUS_A: 552 case SSL3_ST_CR_CERT_STATUS_B: 553 ret=ssl3_get_cert_status(s); 554 if (ret <= 0) goto end; 555 s->state=SSL3_ST_CR_KEY_EXCH_A; 556 s->init_num=0; 557 break; 558#endif 559 560 case SSL3_ST_CR_FINISHED_A: 561 case SSL3_ST_CR_FINISHED_B: 562 563 s->s3->flags |= SSL3_FLAGS_CCS_OK; 564 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A, 565 SSL3_ST_CR_FINISHED_B); 566 if (ret <= 0) goto end; 567 568 if (s->hit) 569 s->state=SSL3_ST_CW_CHANGE_A; 570 else 571 s->state=SSL_ST_OK; 572 s->init_num=0; 573 break; 574 575 case SSL3_ST_CW_FLUSH: 576 s->rwstate=SSL_WRITING; 577 if (BIO_flush(s->wbio) <= 0) 578 { 579 ret= -1; 580 goto end; 581 } 582 s->rwstate=SSL_NOTHING; 583 s->state=s->s3->tmp.next_state; 584 break; 585 586 case SSL_ST_OK: 587 /* clean a few things up */ 588 ssl3_cleanup_key_block(s); 589 590 if (s->init_buf != NULL) 591 { 592 BUF_MEM_free(s->init_buf); 593 s->init_buf=NULL; 594 } 595 596 /* If we are not 'joining' the last two packets, 597 * remove the buffering now */ 598 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER)) 599 ssl_free_wbio_buffer(s); 600 /* else do it later in ssl3_write */ 601 602 s->init_num=0; 603 s->renegotiate=0; 604 s->new_session=0; 605 606 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT); 607 if (s->hit) s->ctx->stats.sess_hit++; 608 609 ret=1; 610 /* s->server=0; */ 611 s->handshake_func=ssl3_connect; 612 s->ctx->stats.sess_connect_good++; 613 614 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1); 615 616 goto end; 617 /* break; */ 618 619 default: 620 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE); 621 ret= -1; 622 goto end; 623 /* break; */ 624 } 625 626 /* did we do anything */ 627 if (!s->s3->tmp.reuse_message && !skip) 628 { 629 if (s->debug) 630 { 631 if ((ret=BIO_flush(s->wbio)) <= 0) 632 goto end; 633 } 634 635 if ((cb != NULL) && (s->state != state)) 636 { 637 new_state=s->state; 638 s->state=state; 639 cb(s,SSL_CB_CONNECT_LOOP,1); 640 s->state=new_state; 641 } 642 } 643 skip=0; 644 } 645end: 646 s->in_handshake--; 647 if (buf != NULL) 648 BUF_MEM_free(buf); 649 if (cb != NULL) 650 cb(s,SSL_CB_CONNECT_EXIT,ret); 651 return(ret); 652 } 653 654 655int ssl3_client_hello(SSL *s) 656 { 657 unsigned char *buf; 658 unsigned char *p,*d; 659 int i; 660 unsigned long l; 661#ifndef OPENSSL_NO_COMP 662 int j; 663 SSL_COMP *comp; 664#endif 665 666 buf=(unsigned char *)s->init_buf->data; 667 if (s->state == SSL3_ST_CW_CLNT_HELLO_A) 668 { 669 SSL_SESSION *sess = s->session; 670 if ((sess == NULL) || 671 (sess->ssl_version != s->version) || 672#ifdef OPENSSL_NO_TLSEXT 673 !sess->session_id_length || 674#else 675 (!sess->session_id_length && !sess->tlsext_tick) || 676#endif 677 (sess->not_resumable)) 678 { 679 if (!ssl_get_new_session(s,0)) 680 goto err; 681 } 682 /* else use the pre-loaded session */ 683 684 p=s->s3->client_random; 685 686 if (ssl_fill_hello_random(s, 0, p, SSL3_RANDOM_SIZE) <= 0) 687 goto err; 688 689 /* Do the message type and length last */ 690 d=p= &(buf[4]); 691 692 /* version indicates the negotiated version: for example from 693 * an SSLv2/v3 compatible client hello). The client_version 694 * field is the maximum version we permit and it is also 695 * used in RSA encrypted premaster secrets. Some servers can 696 * choke if we initially report a higher version then 697 * renegotiate to a lower one in the premaster secret. This 698 * didn't happen with TLS 1.0 as most servers supported it 699 * but it can with TLS 1.1 or later if the server only supports 700 * 1.0. 701 * 702 * Possible scenario with previous logic: 703 * 1. Client hello indicates TLS 1.2 704 * 2. Server hello says TLS 1.0 705 * 3. RSA encrypted premaster secret uses 1.2. 706 * 4. Handhaked proceeds using TLS 1.0. 707 * 5. Server sends hello request to renegotiate. 708 * 6. Client hello indicates TLS v1.0 as we now 709 * know that is maximum server supports. 710 * 7. Server chokes on RSA encrypted premaster secret 711 * containing version 1.0. 712 * 713 * For interoperability it should be OK to always use the 714 * maximum version we support in client hello and then rely 715 * on the checking of version to ensure the servers isn't 716 * being inconsistent: for example initially negotiating with 717 * TLS 1.0 and renegotiating with TLS 1.2. We do this by using 718 * client_version in client hello and not resetting it to 719 * the negotiated version. 720 */ 721#if 0 722 *(p++)=s->version>>8; 723 *(p++)=s->version&0xff; 724 s->client_version=s->version; 725#else 726 *(p++)=s->client_version>>8; 727 *(p++)=s->client_version&0xff; 728#endif 729 730 /* Random stuff */ 731 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE); 732 p+=SSL3_RANDOM_SIZE; 733 734 /* Session ID */ 735 if (s->new_session) 736 i=0; 737 else 738 i=s->session->session_id_length; 739 *(p++)=i; 740 if (i != 0) 741 { 742 if (i > (int)sizeof(s->session->session_id)) 743 { 744 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); 745 goto err; 746 } 747 memcpy(p,s->session->session_id,i); 748 p+=i; 749 } 750 751 /* Ciphers supported */ 752 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0); 753 if (i == 0) 754 { 755 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE); 756 goto err; 757 } 758#ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH 759 /* Some servers hang if client hello > 256 bytes 760 * as hack workaround chop number of supported ciphers 761 * to keep it well below this if we use TLS v1.2 762 */ 763 if (TLS1_get_version(s) >= TLS1_2_VERSION 764 && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH) 765 i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1; 766#endif 767 s2n(i,p); 768 p+=i; 769 770 /* COMPRESSION */ 771#ifdef OPENSSL_NO_COMP 772 *(p++)=1; 773#else 774 775 if ((s->options & SSL_OP_NO_COMPRESSION) 776 || !s->ctx->comp_methods) 777 j=0; 778 else 779 j=sk_SSL_COMP_num(s->ctx->comp_methods); 780 *(p++)=1+j; 781 for (i=0; i<j; i++) 782 { 783 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i); 784 *(p++)=comp->id; 785 } 786#endif 787 *(p++)=0; /* Add the NULL method */ 788 789#ifndef OPENSSL_NO_TLSEXT 790 /* TLS extensions*/ 791 if (ssl_prepare_clienthello_tlsext(s) <= 0) 792 { 793 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT); 794 goto err; 795 } 796 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL) 797 { 798 SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR); 799 goto err; 800 } 801#endif 802 803 l=(p-d); 804 d=buf; 805 *(d++)=SSL3_MT_CLIENT_HELLO; 806 l2n3(l,d); 807 808 s->state=SSL3_ST_CW_CLNT_HELLO_B; 809 /* number of bytes to write */ 810 s->init_num=p-buf; 811 s->init_off=0; 812 } 813 814 /* SSL3_ST_CW_CLNT_HELLO_B */ 815 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 816err: 817 return(-1); 818 } 819 820int ssl3_get_server_hello(SSL *s) 821 { 822 STACK_OF(SSL_CIPHER) *sk; 823 const SSL_CIPHER *c; 824 unsigned char *p,*d; 825 int i,al,ok; 826 unsigned int j; 827 long n; 828#ifndef OPENSSL_NO_COMP 829 SSL_COMP *comp; 830#endif 831 832 n=s->method->ssl_get_message(s, 833 SSL3_ST_CR_SRVR_HELLO_A, 834 SSL3_ST_CR_SRVR_HELLO_B, 835 -1, 836 20000, /* ?? */ 837 &ok); 838 839 if (!ok) return((int)n); 840 841 if ( SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER) 842 { 843 if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST) 844 { 845 if ( s->d1->send_cookie == 0) 846 { 847 s->s3->tmp.reuse_message = 1; 848 return 1; 849 } 850 else /* already sent a cookie */ 851 { 852 al=SSL_AD_UNEXPECTED_MESSAGE; 853 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE); 854 goto f_err; 855 } 856 } 857 } 858 859 if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO) 860 { 861 al=SSL_AD_UNEXPECTED_MESSAGE; 862 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE); 863 goto f_err; 864 } 865 866 d=p=(unsigned char *)s->init_msg; 867 868 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff))) 869 { 870 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION); 871 s->version=(s->version&0xff00)|p[1]; 872 al=SSL_AD_PROTOCOL_VERSION; 873 goto f_err; 874 } 875 p+=2; 876 877 /* load the server hello data */ 878 /* load the server random */ 879 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE); 880 p+=SSL3_RANDOM_SIZE; 881 882 /* get the session-id */ 883 j= *(p++); 884 885 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE)) 886 { 887 al=SSL_AD_ILLEGAL_PARAMETER; 888 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG); 889 goto f_err; 890 } 891 892#ifndef OPENSSL_NO_TLSEXT 893 /* check if we want to resume the session based on external pre-shared secret */ 894 if (s->version >= TLS1_VERSION && s->tls_session_secret_cb) 895 { 896 SSL_CIPHER *pref_cipher=NULL; 897 s->session->master_key_length=sizeof(s->session->master_key); 898 if (s->tls_session_secret_cb(s, s->session->master_key, 899 &s->session->master_key_length, 900 NULL, &pref_cipher, 901 s->tls_session_secret_cb_arg)) 902 { 903 s->session->cipher = pref_cipher ? 904 pref_cipher : ssl_get_cipher_by_char(s, p+j); 905 s->s3->flags |= SSL3_FLAGS_CCS_OK; 906 } 907 } 908#endif /* OPENSSL_NO_TLSEXT */ 909 910 if (j != 0 && j == s->session->session_id_length 911 && memcmp(p,s->session->session_id,j) == 0) 912 { 913 if(s->sid_ctx_length != s->session->sid_ctx_length 914 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length)) 915 { 916 /* actually a client application bug */ 917 al=SSL_AD_ILLEGAL_PARAMETER; 918 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); 919 goto f_err; 920 } 921 s->s3->flags |= SSL3_FLAGS_CCS_OK; 922 s->hit=1; 923 } 924 else /* a miss or crap from the other end */ 925 { 926 /* If we were trying for session-id reuse, make a new 927 * SSL_SESSION so we don't stuff up other people */ 928 s->hit=0; 929 if (s->session->session_id_length > 0) 930 { 931 if (!ssl_get_new_session(s,0)) 932 { 933 al=SSL_AD_INTERNAL_ERROR; 934 goto f_err; 935 } 936 } 937 s->session->session_id_length=j; 938 memcpy(s->session->session_id,p,j); /* j could be 0 */ 939 } 940 p+=j; 941 c=ssl_get_cipher_by_char(s,p); 942 if (c == NULL) 943 { 944 /* unknown cipher */ 945 al=SSL_AD_ILLEGAL_PARAMETER; 946 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED); 947 goto f_err; 948 } 949 /* TLS v1.2 only ciphersuites require v1.2 or later */ 950 if ((c->algorithm_ssl & SSL_TLSV1_2) && 951 (TLS1_get_version(s) < TLS1_2_VERSION)) 952 { 953 al=SSL_AD_ILLEGAL_PARAMETER; 954 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED); 955 goto f_err; 956 } 957#ifndef OPENSSL_NO_SRP 958 if (((c->algorithm_mkey & SSL_kSRP) || (c->algorithm_auth & SSL_aSRP)) && 959 !(s->srp_ctx.srp_Mask & SSL_kSRP)) 960 { 961 al=SSL_AD_ILLEGAL_PARAMETER; 962 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED); 963 goto f_err; 964 } 965#endif /* OPENSSL_NO_SRP */ 966 p+=ssl_put_cipher_by_char(s,NULL,NULL); 967 968 sk=ssl_get_ciphers_by_id(s); 969 i=sk_SSL_CIPHER_find(sk,c); 970 if (i < 0) 971 { 972 /* we did not say we would use this cipher */ 973 al=SSL_AD_ILLEGAL_PARAMETER; 974 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED); 975 goto f_err; 976 } 977 978 /* Depending on the session caching (internal/external), the cipher 979 and/or cipher_id values may not be set. Make sure that 980 cipher_id is set and use it for comparison. */ 981 if (s->session->cipher) 982 s->session->cipher_id = s->session->cipher->id; 983 if (s->hit && (s->session->cipher_id != c->id)) 984 { 985/* Workaround is now obsolete */ 986#if 0 987 if (!(s->options & 988 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG)) 989#endif 990 { 991 al=SSL_AD_ILLEGAL_PARAMETER; 992 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); 993 goto f_err; 994 } 995 } 996 s->s3->tmp.new_cipher=c; 997 /* Don't digest cached records if TLS v1.2: we may need them for 998 * client authentication. 999 */ 1000 if (TLS1_get_version(s) < TLS1_2_VERSION && !ssl3_digest_cached_records(s)) 1001 { 1002 al = SSL_AD_INTERNAL_ERROR; 1003 goto f_err; 1004 } 1005 /* lets get the compression algorithm */ 1006 /* COMPRESSION */ 1007#ifdef OPENSSL_NO_COMP 1008 if (*(p++) != 0) 1009 { 1010 al=SSL_AD_ILLEGAL_PARAMETER; 1011 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); 1012 goto f_err; 1013 } 1014 /* If compression is disabled we'd better not try to resume a session 1015 * using compression. 1016 */ 1017 if (s->session->compress_meth != 0) 1018 { 1019 al=SSL_AD_INTERNAL_ERROR; 1020 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_INCONSISTENT_COMPRESSION); 1021 goto f_err; 1022 } 1023#else 1024 j= *(p++); 1025 if (s->hit && j != s->session->compress_meth) 1026 { 1027 al=SSL_AD_ILLEGAL_PARAMETER; 1028 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED); 1029 goto f_err; 1030 } 1031 if (j == 0) 1032 comp=NULL; 1033 else if (s->options & SSL_OP_NO_COMPRESSION) 1034 { 1035 al=SSL_AD_ILLEGAL_PARAMETER; 1036 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_COMPRESSION_DISABLED); 1037 goto f_err; 1038 } 1039 else 1040 comp=ssl3_comp_find(s->ctx->comp_methods,j); 1041 1042 if ((j != 0) && (comp == NULL)) 1043 { 1044 al=SSL_AD_ILLEGAL_PARAMETER; 1045 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); 1046 goto f_err; 1047 } 1048 else 1049 { 1050 s->s3->tmp.new_compression=comp; 1051 } 1052#endif 1053 1054#ifndef OPENSSL_NO_TLSEXT 1055 /* TLS extensions*/ 1056 if (s->version >= SSL3_VERSION) 1057 { 1058 if (!ssl_parse_serverhello_tlsext(s,&p,d,n, &al)) 1059 { 1060 /* 'al' set by ssl_parse_serverhello_tlsext */ 1061 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT); 1062 goto f_err; 1063 } 1064 if (ssl_check_serverhello_tlsext(s) <= 0) 1065 { 1066 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SERVERHELLO_TLSEXT); 1067 goto err; 1068 } 1069 } 1070#endif 1071 1072 if (p != (d+n)) 1073 { 1074 /* wrong packet length */ 1075 al=SSL_AD_DECODE_ERROR; 1076 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH); 1077 goto f_err; 1078 } 1079 1080 return(1); 1081f_err: 1082 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1083err: 1084 return(-1); 1085 } 1086 1087int ssl3_get_server_certificate(SSL *s) 1088 { 1089 int al,i,ok,ret= -1; 1090 unsigned long n,nc,llen,l; 1091 X509 *x=NULL; 1092 const unsigned char *q,*p; 1093 unsigned char *d; 1094 STACK_OF(X509) *sk=NULL; 1095 SESS_CERT *sc; 1096 EVP_PKEY *pkey=NULL; 1097 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */ 1098 1099 n=s->method->ssl_get_message(s, 1100 SSL3_ST_CR_CERT_A, 1101 SSL3_ST_CR_CERT_B, 1102 -1, 1103 s->max_cert_list, 1104 &ok); 1105 1106 if (!ok) return((int)n); 1107 1108 if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) || 1109 ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) && 1110 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE))) 1111 { 1112 s->s3->tmp.reuse_message=1; 1113 return(1); 1114 } 1115 1116 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE) 1117 { 1118 al=SSL_AD_UNEXPECTED_MESSAGE; 1119 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE); 1120 goto f_err; 1121 } 1122 p=d=(unsigned char *)s->init_msg; 1123 1124 if ((sk=sk_X509_new_null()) == NULL) 1125 { 1126 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE); 1127 goto err; 1128 } 1129 1130 n2l3(p,llen); 1131 if (llen+3 != n) 1132 { 1133 al=SSL_AD_DECODE_ERROR; 1134 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH); 1135 goto f_err; 1136 } 1137 for (nc=0; nc<llen; ) 1138 { 1139 n2l3(p,l); 1140 if ((l+nc+3) > llen) 1141 { 1142 al=SSL_AD_DECODE_ERROR; 1143 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); 1144 goto f_err; 1145 } 1146 1147 q=p; 1148 x=d2i_X509(NULL,&q,l); 1149 if (x == NULL) 1150 { 1151 al=SSL_AD_BAD_CERTIFICATE; 1152 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB); 1153 goto f_err; 1154 } 1155 if (q != (p+l)) 1156 { 1157 al=SSL_AD_DECODE_ERROR; 1158 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); 1159 goto f_err; 1160 } 1161 if (!sk_X509_push(sk,x)) 1162 { 1163 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE); 1164 goto err; 1165 } 1166 x=NULL; 1167 nc+=l+3; 1168 p=q; 1169 } 1170 1171 i=ssl_verify_cert_chain(s,sk); 1172 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0) 1173#ifndef OPENSSL_NO_KRB5 1174 && !((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) && 1175 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5)) 1176#endif /* OPENSSL_NO_KRB5 */ 1177 ) 1178 { 1179 al=ssl_verify_alarm_type(s->verify_result); 1180 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED); 1181 goto f_err; 1182 } 1183 ERR_clear_error(); /* but we keep s->verify_result */ 1184 1185 sc=ssl_sess_cert_new(); 1186 if (sc == NULL) goto err; 1187 1188 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert); 1189 s->session->sess_cert=sc; 1190 1191 sc->cert_chain=sk; 1192 /* Inconsistency alert: cert_chain does include the peer's 1193 * certificate, which we don't include in s3_srvr.c */ 1194 x=sk_X509_value(sk,0); 1195 sk=NULL; 1196 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/ 1197 1198 pkey=X509_get_pubkey(x); 1199 1200 /* VRS: allow null cert if auth == KRB5 */ 1201 need_cert = ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) && 1202 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5)) 1203 ? 0 : 1; 1204 1205#ifdef KSSL_DEBUG 1206 printf("pkey,x = %p, %p\n", pkey,x); 1207 printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey)); 1208 printf("cipher, alg, nc = %s, %lx, %lx, %d\n", s->s3->tmp.new_cipher->name, 1209 s->s3->tmp.new_cipher->algorithm_mkey, s->s3->tmp.new_cipher->algorithm_auth, need_cert); 1210#endif /* KSSL_DEBUG */ 1211 1212 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey))) 1213 { 1214 x=NULL; 1215 al=SSL3_AL_FATAL; 1216 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 1217 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); 1218 goto f_err; 1219 } 1220 1221 i=ssl_cert_type(x,pkey); 1222 if (need_cert && i < 0) 1223 { 1224 x=NULL; 1225 al=SSL3_AL_FATAL; 1226 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 1227 SSL_R_UNKNOWN_CERTIFICATE_TYPE); 1228 goto f_err; 1229 } 1230 1231 if (need_cert) 1232 { 1233 sc->peer_cert_type=i; 1234 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509); 1235 /* Why would the following ever happen? 1236 * We just created sc a couple of lines ago. */ 1237 if (sc->peer_pkeys[i].x509 != NULL) 1238 X509_free(sc->peer_pkeys[i].x509); 1239 sc->peer_pkeys[i].x509=x; 1240 sc->peer_key= &(sc->peer_pkeys[i]); 1241 1242 if (s->session->peer != NULL) 1243 X509_free(s->session->peer); 1244 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509); 1245 s->session->peer=x; 1246 } 1247 else 1248 { 1249 sc->peer_cert_type=i; 1250 sc->peer_key= NULL; 1251 1252 if (s->session->peer != NULL) 1253 X509_free(s->session->peer); 1254 s->session->peer=NULL; 1255 } 1256 s->session->verify_result = s->verify_result; 1257 1258 x=NULL; 1259 ret=1; 1260 1261 if (0) 1262 { 1263f_err: 1264 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1265 } 1266err: 1267 EVP_PKEY_free(pkey); 1268 X509_free(x); 1269 sk_X509_pop_free(sk,X509_free); 1270 return(ret); 1271 } 1272 1273int ssl3_get_key_exchange(SSL *s) 1274 { 1275#ifndef OPENSSL_NO_RSA 1276 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2]; 1277#endif 1278 EVP_MD_CTX md_ctx; 1279 unsigned char *param,*p; 1280 int al,i,j,param_len,ok; 1281 long n,alg_k,alg_a; 1282 EVP_PKEY *pkey=NULL; 1283 const EVP_MD *md = NULL; 1284#ifndef OPENSSL_NO_RSA 1285 RSA *rsa=NULL; 1286#endif 1287#ifndef OPENSSL_NO_DH 1288 DH *dh=NULL; 1289#endif 1290#ifndef OPENSSL_NO_ECDH 1291 EC_KEY *ecdh = NULL; 1292 BN_CTX *bn_ctx = NULL; 1293 EC_POINT *srvr_ecpoint = NULL; 1294 int curve_nid = 0; 1295 int encoded_pt_len = 0; 1296#endif 1297 1298 /* use same message size as in ssl3_get_certificate_request() 1299 * as ServerKeyExchange message may be skipped */ 1300 n=s->method->ssl_get_message(s, 1301 SSL3_ST_CR_KEY_EXCH_A, 1302 SSL3_ST_CR_KEY_EXCH_B, 1303 -1, 1304 s->max_cert_list, 1305 &ok); 1306 if (!ok) return((int)n); 1307 1308 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE) 1309 { 1310#ifndef OPENSSL_NO_PSK 1311 /* In plain PSK ciphersuite, ServerKeyExchange can be 1312 omitted if no identity hint is sent. Set 1313 session->sess_cert anyway to avoid problems 1314 later.*/ 1315 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK) 1316 { 1317 s->session->sess_cert=ssl_sess_cert_new(); 1318 if (s->ctx->psk_identity_hint) 1319 OPENSSL_free(s->ctx->psk_identity_hint); 1320 s->ctx->psk_identity_hint = NULL; 1321 } 1322#endif 1323 s->s3->tmp.reuse_message=1; 1324 return(1); 1325 } 1326 1327 param=p=(unsigned char *)s->init_msg; 1328 if (s->session->sess_cert != NULL) 1329 { 1330#ifndef OPENSSL_NO_RSA 1331 if (s->session->sess_cert->peer_rsa_tmp != NULL) 1332 { 1333 RSA_free(s->session->sess_cert->peer_rsa_tmp); 1334 s->session->sess_cert->peer_rsa_tmp=NULL; 1335 } 1336#endif 1337#ifndef OPENSSL_NO_DH 1338 if (s->session->sess_cert->peer_dh_tmp) 1339 { 1340 DH_free(s->session->sess_cert->peer_dh_tmp); 1341 s->session->sess_cert->peer_dh_tmp=NULL; 1342 } 1343#endif 1344#ifndef OPENSSL_NO_ECDH 1345 if (s->session->sess_cert->peer_ecdh_tmp) 1346 { 1347 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp); 1348 s->session->sess_cert->peer_ecdh_tmp=NULL; 1349 } 1350#endif 1351 } 1352 else 1353 { 1354 s->session->sess_cert=ssl_sess_cert_new(); 1355 } 1356 1357 param_len=0; 1358 alg_k=s->s3->tmp.new_cipher->algorithm_mkey; 1359 alg_a=s->s3->tmp.new_cipher->algorithm_auth; 1360 EVP_MD_CTX_init(&md_ctx); 1361 1362#ifndef OPENSSL_NO_PSK 1363 if (alg_k & SSL_kPSK) 1364 { 1365 char tmp_id_hint[PSK_MAX_IDENTITY_LEN+1]; 1366 1367 al=SSL_AD_HANDSHAKE_FAILURE; 1368 n2s(p,i); 1369 param_len=i+2; 1370 /* Store PSK identity hint for later use, hint is used 1371 * in ssl3_send_client_key_exchange. Assume that the 1372 * maximum length of a PSK identity hint can be as 1373 * long as the maximum length of a PSK identity. */ 1374 if (i > PSK_MAX_IDENTITY_LEN) 1375 { 1376 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1377 SSL_R_DATA_LENGTH_TOO_LONG); 1378 goto f_err; 1379 } 1380 if (param_len > n) 1381 { 1382 al=SSL_AD_DECODE_ERROR; 1383 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1384 SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH); 1385 goto f_err; 1386 } 1387 /* If received PSK identity hint contains NULL 1388 * characters, the hint is truncated from the first 1389 * NULL. p may not be ending with NULL, so create a 1390 * NULL-terminated string. */ 1391 memcpy(tmp_id_hint, p, i); 1392 memset(tmp_id_hint+i, 0, PSK_MAX_IDENTITY_LEN+1-i); 1393 if (s->ctx->psk_identity_hint != NULL) 1394 OPENSSL_free(s->ctx->psk_identity_hint); 1395 s->ctx->psk_identity_hint = BUF_strdup(tmp_id_hint); 1396 if (s->ctx->psk_identity_hint == NULL) 1397 { 1398 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); 1399 goto f_err; 1400 } 1401 1402 p+=i; 1403 n-=param_len; 1404 } 1405 else 1406#endif /* !OPENSSL_NO_PSK */ 1407#ifndef OPENSSL_NO_SRP 1408 if (alg_k & SSL_kSRP) 1409 { 1410 n2s(p,i); 1411 param_len=i+2; 1412 if (param_len > n) 1413 { 1414 al=SSL_AD_DECODE_ERROR; 1415 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_N_LENGTH); 1416 goto f_err; 1417 } 1418 if (!(s->srp_ctx.N=BN_bin2bn(p,i,NULL))) 1419 { 1420 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1421 goto err; 1422 } 1423 p+=i; 1424 1425 n2s(p,i); 1426 param_len+=i+2; 1427 if (param_len > n) 1428 { 1429 al=SSL_AD_DECODE_ERROR; 1430 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_G_LENGTH); 1431 goto f_err; 1432 } 1433 if (!(s->srp_ctx.g=BN_bin2bn(p,i,NULL))) 1434 { 1435 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1436 goto err; 1437 } 1438 p+=i; 1439 1440 i = (unsigned int)(p[0]); 1441 p++; 1442 param_len+=i+1; 1443 if (param_len > n) 1444 { 1445 al=SSL_AD_DECODE_ERROR; 1446 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_S_LENGTH); 1447 goto f_err; 1448 } 1449 if (!(s->srp_ctx.s=BN_bin2bn(p,i,NULL))) 1450 { 1451 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1452 goto err; 1453 } 1454 p+=i; 1455 1456 n2s(p,i); 1457 param_len+=i+2; 1458 if (param_len > n) 1459 { 1460 al=SSL_AD_DECODE_ERROR; 1461 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_B_LENGTH); 1462 goto f_err; 1463 } 1464 if (!(s->srp_ctx.B=BN_bin2bn(p,i,NULL))) 1465 { 1466 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1467 goto err; 1468 } 1469 p+=i; 1470 n-=param_len; 1471 1472 if (!srp_verify_server_param(s, &al)) 1473 { 1474 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_PARAMETERS); 1475 goto f_err; 1476 } 1477 1478/* We must check if there is a certificate */ 1479#ifndef OPENSSL_NO_RSA 1480 if (alg_a & SSL_aRSA) 1481 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1482#else 1483 if (0) 1484 ; 1485#endif 1486#ifndef OPENSSL_NO_DSA 1487 else if (alg_a & SSL_aDSS) 1488 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509); 1489#endif 1490 } 1491 else 1492#endif /* !OPENSSL_NO_SRP */ 1493#ifndef OPENSSL_NO_RSA 1494 if (alg_k & SSL_kRSA) 1495 { 1496 if ((rsa=RSA_new()) == NULL) 1497 { 1498 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1499 goto err; 1500 } 1501 n2s(p,i); 1502 param_len=i+2; 1503 if (param_len > n) 1504 { 1505 al=SSL_AD_DECODE_ERROR; 1506 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH); 1507 goto f_err; 1508 } 1509 if (!(rsa->n=BN_bin2bn(p,i,rsa->n))) 1510 { 1511 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1512 goto err; 1513 } 1514 p+=i; 1515 1516 n2s(p,i); 1517 param_len+=i+2; 1518 if (param_len > n) 1519 { 1520 al=SSL_AD_DECODE_ERROR; 1521 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH); 1522 goto f_err; 1523 } 1524 if (!(rsa->e=BN_bin2bn(p,i,rsa->e))) 1525 { 1526 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1527 goto err; 1528 } 1529 p+=i; 1530 n-=param_len; 1531 1532 /* this should be because we are using an export cipher */ 1533 if (alg_a & SSL_aRSA) 1534 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1535 else 1536 { 1537 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1538 goto err; 1539 } 1540 s->session->sess_cert->peer_rsa_tmp=rsa; 1541 rsa=NULL; 1542 } 1543#else /* OPENSSL_NO_RSA */ 1544 if (0) 1545 ; 1546#endif 1547#ifndef OPENSSL_NO_DH 1548 else if (alg_k & SSL_kEDH) 1549 { 1550 if ((dh=DH_new()) == NULL) 1551 { 1552 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB); 1553 goto err; 1554 } 1555 n2s(p,i); 1556 param_len=i+2; 1557 if (param_len > n) 1558 { 1559 al=SSL_AD_DECODE_ERROR; 1560 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH); 1561 goto f_err; 1562 } 1563 if (!(dh->p=BN_bin2bn(p,i,NULL))) 1564 { 1565 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1566 goto err; 1567 } 1568 p+=i; 1569 1570 n2s(p,i); 1571 param_len+=i+2; 1572 if (param_len > n) 1573 { 1574 al=SSL_AD_DECODE_ERROR; 1575 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH); 1576 goto f_err; 1577 } 1578 if (!(dh->g=BN_bin2bn(p,i,NULL))) 1579 { 1580 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1581 goto err; 1582 } 1583 p+=i; 1584 1585 n2s(p,i); 1586 param_len+=i+2; 1587 if (param_len > n) 1588 { 1589 al=SSL_AD_DECODE_ERROR; 1590 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH); 1591 goto f_err; 1592 } 1593 if (!(dh->pub_key=BN_bin2bn(p,i,NULL))) 1594 { 1595 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1596 goto err; 1597 } 1598 p+=i; 1599 n-=param_len; 1600 1601#ifndef OPENSSL_NO_RSA 1602 if (alg_a & SSL_aRSA) 1603 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1604#else 1605 if (0) 1606 ; 1607#endif 1608#ifndef OPENSSL_NO_DSA 1609 else if (alg_a & SSL_aDSS) 1610 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509); 1611#endif 1612 /* else anonymous DH, so no certificate or pkey. */ 1613 1614 s->session->sess_cert->peer_dh_tmp=dh; 1615 dh=NULL; 1616 } 1617 else if ((alg_k & SSL_kDHr) || (alg_k & SSL_kDHd)) 1618 { 1619 al=SSL_AD_ILLEGAL_PARAMETER; 1620 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER); 1621 goto f_err; 1622 } 1623#endif /* !OPENSSL_NO_DH */ 1624 1625#ifndef OPENSSL_NO_ECDH 1626 else if (alg_k & SSL_kEECDH) 1627 { 1628 EC_GROUP *ngroup; 1629 const EC_GROUP *group; 1630 1631 if ((ecdh=EC_KEY_new()) == NULL) 1632 { 1633 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1634 goto err; 1635 } 1636 1637 /* Extract elliptic curve parameters and the 1638 * server's ephemeral ECDH public key. 1639 * Keep accumulating lengths of various components in 1640 * param_len and make sure it never exceeds n. 1641 */ 1642 1643 /* XXX: For now we only support named (not generic) curves 1644 * and the ECParameters in this case is just three bytes. 1645 */ 1646 param_len=3; 1647 if ((param_len > n) || 1648 (*p != NAMED_CURVE_TYPE) || 1649 ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0)) 1650 { 1651 al=SSL_AD_INTERNAL_ERROR; 1652 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); 1653 goto f_err; 1654 } 1655 1656 ngroup = EC_GROUP_new_by_curve_name(curve_nid); 1657 if (ngroup == NULL) 1658 { 1659 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB); 1660 goto err; 1661 } 1662 if (EC_KEY_set_group(ecdh, ngroup) == 0) 1663 { 1664 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB); 1665 goto err; 1666 } 1667 EC_GROUP_free(ngroup); 1668 1669 group = EC_KEY_get0_group(ecdh); 1670 1671 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && 1672 (EC_GROUP_get_degree(group) > 163)) 1673 { 1674 al=SSL_AD_EXPORT_RESTRICTION; 1675 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER); 1676 goto f_err; 1677 } 1678 1679 p+=3; 1680 1681 /* Next, get the encoded ECPoint */ 1682 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) || 1683 ((bn_ctx = BN_CTX_new()) == NULL)) 1684 { 1685 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1686 goto err; 1687 } 1688 1689 encoded_pt_len = *p; /* length of encoded point */ 1690 p+=1; 1691 param_len += (1 + encoded_pt_len); 1692 if ((param_len > n) || 1693 (EC_POINT_oct2point(group, srvr_ecpoint, 1694 p, encoded_pt_len, bn_ctx) == 0)) 1695 { 1696 al=SSL_AD_DECODE_ERROR; 1697 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT); 1698 goto f_err; 1699 } 1700 1701 n-=param_len; 1702 p+=encoded_pt_len; 1703 1704 /* The ECC/TLS specification does not mention 1705 * the use of DSA to sign ECParameters in the server 1706 * key exchange message. We do support RSA and ECDSA. 1707 */ 1708 if (0) ; 1709#ifndef OPENSSL_NO_RSA 1710 else if (alg_a & SSL_aRSA) 1711 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1712#endif 1713#ifndef OPENSSL_NO_ECDSA 1714 else if (alg_a & SSL_aECDSA) 1715 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509); 1716#endif 1717 /* else anonymous ECDH, so no certificate or pkey. */ 1718 EC_KEY_set_public_key(ecdh, srvr_ecpoint); 1719 s->session->sess_cert->peer_ecdh_tmp=ecdh; 1720 ecdh=NULL; 1721 BN_CTX_free(bn_ctx); 1722 bn_ctx = NULL; 1723 EC_POINT_free(srvr_ecpoint); 1724 srvr_ecpoint = NULL; 1725 } 1726 else if (alg_k) 1727 { 1728 al=SSL_AD_UNEXPECTED_MESSAGE; 1729 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE); 1730 goto f_err; 1731 } 1732#endif /* !OPENSSL_NO_ECDH */ 1733 1734 1735 /* p points to the next byte, there are 'n' bytes left */ 1736 1737 /* if it was signed, check the signature */ 1738 if (pkey != NULL) 1739 { 1740 if (TLS1_get_version(s) >= TLS1_2_VERSION) 1741 { 1742 int sigalg = tls12_get_sigid(pkey); 1743 /* Should never happen */ 1744 if (sigalg == -1) 1745 { 1746 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1747 goto err; 1748 } 1749 /* Check key type is consistent with signature */ 1750 if (sigalg != (int)p[1]) 1751 { 1752 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_TYPE); 1753 al=SSL_AD_DECODE_ERROR; 1754 goto f_err; 1755 } 1756 md = tls12_get_hash(p[0]); 1757 if (md == NULL) 1758 { 1759 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNKNOWN_DIGEST); 1760 al=SSL_AD_DECODE_ERROR; 1761 goto f_err; 1762 } 1763#ifdef SSL_DEBUG 1764fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md)); 1765#endif 1766 p += 2; 1767 n -= 2; 1768 } 1769 else 1770 md = EVP_sha1(); 1771 1772 n2s(p,i); 1773 n-=2; 1774 j=EVP_PKEY_size(pkey); 1775 1776 if ((i != n) || (n > j) || (n <= 0)) 1777 { 1778 /* wrong packet length */ 1779 al=SSL_AD_DECODE_ERROR; 1780 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH); 1781 goto f_err; 1782 } 1783 1784#ifndef OPENSSL_NO_RSA 1785 if (pkey->type == EVP_PKEY_RSA && TLS1_get_version(s) < TLS1_2_VERSION) 1786 { 1787 int num; 1788 1789 j=0; 1790 q=md_buf; 1791 for (num=2; num > 0; num--) 1792 { 1793 EVP_MD_CTX_set_flags(&md_ctx, 1794 EVP_MD_CTX_FLAG_NON_FIPS_ALLOW); 1795 EVP_DigestInit_ex(&md_ctx,(num == 2) 1796 ?s->ctx->md5:s->ctx->sha1, NULL); 1797 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); 1798 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); 1799 EVP_DigestUpdate(&md_ctx,param,param_len); 1800 EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i); 1801 q+=i; 1802 j+=i; 1803 } 1804 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n, 1805 pkey->pkey.rsa); 1806 if (i < 0) 1807 { 1808 al=SSL_AD_DECRYPT_ERROR; 1809 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT); 1810 goto f_err; 1811 } 1812 if (i == 0) 1813 { 1814 /* bad signature */ 1815 al=SSL_AD_DECRYPT_ERROR; 1816 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE); 1817 goto f_err; 1818 } 1819 } 1820 else 1821#endif 1822 { 1823 EVP_VerifyInit_ex(&md_ctx, md, NULL); 1824 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); 1825 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); 1826 EVP_VerifyUpdate(&md_ctx,param,param_len); 1827 if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0) 1828 { 1829 /* bad signature */ 1830 al=SSL_AD_DECRYPT_ERROR; 1831 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE); 1832 goto f_err; 1833 } 1834 } 1835 } 1836 else 1837 { 1838 if (!(alg_a & SSL_aNULL) && !(alg_k & SSL_kPSK)) 1839 /* aNULL or kPSK do not need public keys */ 1840 { 1841 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1842 goto err; 1843 } 1844 /* still data left over */ 1845 if (n != 0) 1846 { 1847 al=SSL_AD_DECODE_ERROR; 1848 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE); 1849 goto f_err; 1850 } 1851 } 1852 EVP_PKEY_free(pkey); 1853 EVP_MD_CTX_cleanup(&md_ctx); 1854 return(1); 1855f_err: 1856 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1857err: 1858 EVP_PKEY_free(pkey); 1859#ifndef OPENSSL_NO_RSA 1860 if (rsa != NULL) 1861 RSA_free(rsa); 1862#endif 1863#ifndef OPENSSL_NO_DH 1864 if (dh != NULL) 1865 DH_free(dh); 1866#endif 1867#ifndef OPENSSL_NO_ECDH 1868 BN_CTX_free(bn_ctx); 1869 EC_POINT_free(srvr_ecpoint); 1870 if (ecdh != NULL) 1871 EC_KEY_free(ecdh); 1872#endif 1873 EVP_MD_CTX_cleanup(&md_ctx); 1874 return(-1); 1875 } 1876 1877int ssl3_get_certificate_request(SSL *s) 1878 { 1879 int ok,ret=0; 1880 unsigned long n,nc,l; 1881 unsigned int llen, ctype_num,i; 1882 X509_NAME *xn=NULL; 1883 const unsigned char *p,*q; 1884 unsigned char *d; 1885 STACK_OF(X509_NAME) *ca_sk=NULL; 1886 1887 n=s->method->ssl_get_message(s, 1888 SSL3_ST_CR_CERT_REQ_A, 1889 SSL3_ST_CR_CERT_REQ_B, 1890 -1, 1891 s->max_cert_list, 1892 &ok); 1893 1894 if (!ok) return((int)n); 1895 1896 s->s3->tmp.cert_req=0; 1897 1898 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE) 1899 { 1900 s->s3->tmp.reuse_message=1; 1901 /* If we get here we don't need any cached handshake records 1902 * as we wont be doing client auth. 1903 */ 1904 if (s->s3->handshake_buffer) 1905 { 1906 if (!ssl3_digest_cached_records(s)) 1907 goto err; 1908 } 1909 return(1); 1910 } 1911 1912 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST) 1913 { 1914 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 1915 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE); 1916 goto err; 1917 } 1918 1919 /* TLS does not like anon-DH with client cert */ 1920 if (s->version > SSL3_VERSION) 1921 { 1922 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) 1923 { 1924 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 1925 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER); 1926 goto err; 1927 } 1928 } 1929 1930 p=d=(unsigned char *)s->init_msg; 1931 1932 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL) 1933 { 1934 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE); 1935 goto err; 1936 } 1937 1938 /* get the certificate types */ 1939 ctype_num= *(p++); 1940 if (ctype_num > SSL3_CT_NUMBER) 1941 ctype_num=SSL3_CT_NUMBER; 1942 for (i=0; i<ctype_num; i++) 1943 s->s3->tmp.ctype[i]= p[i]; 1944 p+=ctype_num; 1945 if (TLS1_get_version(s) >= TLS1_2_VERSION) 1946 { 1947 n2s(p, llen); 1948 /* Check we have enough room for signature algorithms and 1949 * following length value. 1950 */ 1951 if ((unsigned long)(p - d + llen + 2) > n) 1952 { 1953 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1954 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_DATA_LENGTH_TOO_LONG); 1955 goto err; 1956 } 1957 if ((llen & 1) || !tls1_process_sigalgs(s, p, llen)) 1958 { 1959 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1960 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_SIGNATURE_ALGORITHMS_ERROR); 1961 goto err; 1962 } 1963 p += llen; 1964 } 1965 1966 /* get the CA RDNs */ 1967 n2s(p,llen); 1968#if 0 1969{ 1970FILE *out; 1971out=fopen("/tmp/vsign.der","w"); 1972fwrite(p,1,llen,out); 1973fclose(out); 1974} 1975#endif 1976 1977 if ((unsigned long)(p - d + llen) != n) 1978 { 1979 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1980 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH); 1981 goto err; 1982 } 1983 1984 for (nc=0; nc<llen; ) 1985 { 1986 n2s(p,l); 1987 if ((l+nc+2) > llen) 1988 { 1989 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG)) 1990 goto cont; /* netscape bugs */ 1991 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1992 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG); 1993 goto err; 1994 } 1995 1996 q=p; 1997 1998 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL) 1999 { 2000 /* If netscape tolerance is on, ignore errors */ 2001 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG) 2002 goto cont; 2003 else 2004 { 2005 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 2006 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB); 2007 goto err; 2008 } 2009 } 2010 2011 if (q != (p+l)) 2012 { 2013 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 2014 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH); 2015 goto err; 2016 } 2017 if (!sk_X509_NAME_push(ca_sk,xn)) 2018 { 2019 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE); 2020 goto err; 2021 } 2022 2023 p+=l; 2024 nc+=l+2; 2025 } 2026 2027 if (0) 2028 { 2029cont: 2030 ERR_clear_error(); 2031 } 2032 2033 /* we should setup a certificate to return.... */ 2034 s->s3->tmp.cert_req=1; 2035 s->s3->tmp.ctype_num=ctype_num; 2036 if (s->s3->tmp.ca_names != NULL) 2037 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free); 2038 s->s3->tmp.ca_names=ca_sk; 2039 ca_sk=NULL; 2040 2041 ret=1; 2042err: 2043 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free); 2044 return(ret); 2045 } 2046 2047static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b) 2048 { 2049 return(X509_NAME_cmp(*a,*b)); 2050 } 2051#ifndef OPENSSL_NO_TLSEXT 2052int ssl3_get_new_session_ticket(SSL *s) 2053 { 2054 int ok,al,ret=0, ticklen; 2055 long n; 2056 const unsigned char *p; 2057 unsigned char *d; 2058 2059 n=s->method->ssl_get_message(s, 2060 SSL3_ST_CR_SESSION_TICKET_A, 2061 SSL3_ST_CR_SESSION_TICKET_B, 2062 -1, 2063 16384, 2064 &ok); 2065 2066 if (!ok) 2067 return((int)n); 2068 2069 if (s->s3->tmp.message_type == SSL3_MT_FINISHED) 2070 { 2071 s->s3->tmp.reuse_message=1; 2072 return(1); 2073 } 2074 if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET) 2075 { 2076 al=SSL_AD_UNEXPECTED_MESSAGE; 2077 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_BAD_MESSAGE_TYPE); 2078 goto f_err; 2079 } 2080 if (n < 6) 2081 { 2082 /* need at least ticket_lifetime_hint + ticket length */ 2083 al = SSL_AD_DECODE_ERROR; 2084 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH); 2085 goto f_err; 2086 } 2087 2088 p=d=(unsigned char *)s->init_msg; 2089 n2l(p, s->session->tlsext_tick_lifetime_hint); 2090 n2s(p, ticklen); 2091 /* ticket_lifetime_hint + ticket_length + ticket */ 2092 if (ticklen + 6 != n) 2093 { 2094 al = SSL_AD_DECODE_ERROR; 2095 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH); 2096 goto f_err; 2097 } 2098 if (s->session->tlsext_tick) 2099 { 2100 OPENSSL_free(s->session->tlsext_tick); 2101 s->session->tlsext_ticklen = 0; 2102 } 2103 s->session->tlsext_tick = OPENSSL_malloc(ticklen); 2104 if (!s->session->tlsext_tick) 2105 { 2106 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE); 2107 goto err; 2108 } 2109 memcpy(s->session->tlsext_tick, p, ticklen); 2110 s->session->tlsext_ticklen = ticklen; 2111 /* There are two ways to detect a resumed ticket sesion. 2112 * One is to set an appropriate session ID and then the server 2113 * must return a match in ServerHello. This allows the normal 2114 * client session ID matching to work and we know much 2115 * earlier that the ticket has been accepted. 2116 * 2117 * The other way is to set zero length session ID when the 2118 * ticket is presented and rely on the handshake to determine 2119 * session resumption. 2120 * 2121 * We choose the former approach because this fits in with 2122 * assumptions elsewhere in OpenSSL. The session ID is set 2123 * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the 2124 * ticket. 2125 */ 2126 EVP_Digest(p, ticklen, 2127 s->session->session_id, &s->session->session_id_length, 2128#ifndef OPENSSL_NO_SHA256 2129 EVP_sha256(), NULL); 2130#else 2131 EVP_sha1(), NULL); 2132#endif 2133 ret=1; 2134 return(ret); 2135f_err: 2136 ssl3_send_alert(s,SSL3_AL_FATAL,al); 2137err: 2138 return(-1); 2139 } 2140 2141int ssl3_get_cert_status(SSL *s) 2142 { 2143 int ok, al; 2144 unsigned long resplen,n; 2145 const unsigned char *p; 2146 2147 n=s->method->ssl_get_message(s, 2148 SSL3_ST_CR_CERT_STATUS_A, 2149 SSL3_ST_CR_CERT_STATUS_B, 2150 SSL3_MT_CERTIFICATE_STATUS, 2151 16384, 2152 &ok); 2153 2154 if (!ok) return((int)n); 2155 if (n < 4) 2156 { 2157 /* need at least status type + length */ 2158 al = SSL_AD_DECODE_ERROR; 2159 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH); 2160 goto f_err; 2161 } 2162 p = (unsigned char *)s->init_msg; 2163 if (*p++ != TLSEXT_STATUSTYPE_ocsp) 2164 { 2165 al = SSL_AD_DECODE_ERROR; 2166 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_UNSUPPORTED_STATUS_TYPE); 2167 goto f_err; 2168 } 2169 n2l3(p, resplen); 2170 if (resplen + 4 != n) 2171 { 2172 al = SSL_AD_DECODE_ERROR; 2173 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH); 2174 goto f_err; 2175 } 2176 if (s->tlsext_ocsp_resp) 2177 OPENSSL_free(s->tlsext_ocsp_resp); 2178 s->tlsext_ocsp_resp = BUF_memdup(p, resplen); 2179 if (!s->tlsext_ocsp_resp) 2180 { 2181 al = SSL_AD_INTERNAL_ERROR; 2182 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE); 2183 goto f_err; 2184 } 2185 s->tlsext_ocsp_resplen = resplen; 2186 if (s->ctx->tlsext_status_cb) 2187 { 2188 int ret; 2189 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg); 2190 if (ret == 0) 2191 { 2192 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE; 2193 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_INVALID_STATUS_RESPONSE); 2194 goto f_err; 2195 } 2196 if (ret < 0) 2197 { 2198 al = SSL_AD_INTERNAL_ERROR; 2199 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE); 2200 goto f_err; 2201 } 2202 } 2203 return 1; 2204f_err: 2205 ssl3_send_alert(s,SSL3_AL_FATAL,al); 2206 return(-1); 2207 } 2208#endif 2209 2210int ssl3_get_server_done(SSL *s) 2211 { 2212 int ok,ret=0; 2213 long n; 2214 2215 n=s->method->ssl_get_message(s, 2216 SSL3_ST_CR_SRVR_DONE_A, 2217 SSL3_ST_CR_SRVR_DONE_B, 2218 SSL3_MT_SERVER_DONE, 2219 30, /* should be very small, like 0 :-) */ 2220 &ok); 2221 2222 if (!ok) return((int)n); 2223 if (n > 0) 2224 { 2225 /* should contain no data */ 2226 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 2227 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH); 2228 return -1; 2229 } 2230 ret=1; 2231 return(ret); 2232 } 2233 2234 2235int ssl3_send_client_key_exchange(SSL *s) 2236 { 2237 unsigned char *p,*d; 2238 int n; 2239 unsigned long alg_k; 2240#ifndef OPENSSL_NO_RSA 2241 unsigned char *q; 2242 EVP_PKEY *pkey=NULL; 2243#endif 2244#ifndef OPENSSL_NO_KRB5 2245 KSSL_ERR kssl_err; 2246#endif /* OPENSSL_NO_KRB5 */ 2247#ifndef OPENSSL_NO_ECDH 2248 EC_KEY *clnt_ecdh = NULL; 2249 const EC_POINT *srvr_ecpoint = NULL; 2250 EVP_PKEY *srvr_pub_pkey = NULL; 2251 unsigned char *encodedPoint = NULL; 2252 int encoded_pt_len = 0; 2253 BN_CTX * bn_ctx = NULL; 2254#endif 2255 2256 if (s->state == SSL3_ST_CW_KEY_EXCH_A) 2257 { 2258 d=(unsigned char *)s->init_buf->data; 2259 p= &(d[4]); 2260 2261 alg_k=s->s3->tmp.new_cipher->algorithm_mkey; 2262 2263 /* Fool emacs indentation */ 2264 if (0) {} 2265#ifndef OPENSSL_NO_RSA 2266 else if (alg_k & SSL_kRSA) 2267 { 2268 RSA *rsa; 2269 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; 2270 2271 if (s->session->sess_cert == NULL) 2272 { 2273 /* We should always have a server certificate with SSL_kRSA. */ 2274 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 2275 goto err; 2276 } 2277 2278 if (s->session->sess_cert->peer_rsa_tmp != NULL) 2279 rsa=s->session->sess_cert->peer_rsa_tmp; 2280 else 2281 { 2282 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 2283 if ((pkey == NULL) || 2284 (pkey->type != EVP_PKEY_RSA) || 2285 (pkey->pkey.rsa == NULL)) 2286 { 2287 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 2288 goto err; 2289 } 2290 rsa=pkey->pkey.rsa; 2291 EVP_PKEY_free(pkey); 2292 } 2293 2294 tmp_buf[0]=s->client_version>>8; 2295 tmp_buf[1]=s->client_version&0xff; 2296 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0) 2297 goto err; 2298 2299 s->session->master_key_length=sizeof tmp_buf; 2300 2301 q=p; 2302 /* Fix buf for TLS and beyond */ 2303 if (s->version > SSL3_VERSION) 2304 p+=2; 2305 n=RSA_public_encrypt(sizeof tmp_buf, 2306 tmp_buf,p,rsa,RSA_PKCS1_PADDING); 2307#ifdef PKCS1_CHECK 2308 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++; 2309 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70; 2310#endif 2311 if (n <= 0) 2312 { 2313 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT); 2314 goto err; 2315 } 2316 2317 /* Fix buf for TLS and beyond */ 2318 if (s->version > SSL3_VERSION) 2319 { 2320 s2n(n,q); 2321 n+=2; 2322 } 2323 2324 s->session->master_key_length= 2325 s->method->ssl3_enc->generate_master_secret(s, 2326 s->session->master_key, 2327 tmp_buf,sizeof tmp_buf); 2328 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf); 2329 } 2330#endif 2331#ifndef OPENSSL_NO_KRB5 2332 else if (alg_k & SSL_kKRB5) 2333 { 2334 krb5_error_code krb5rc; 2335 KSSL_CTX *kssl_ctx = s->kssl_ctx; 2336 /* krb5_data krb5_ap_req; */ 2337 krb5_data *enc_ticket; 2338 krb5_data authenticator, *authp = NULL; 2339 EVP_CIPHER_CTX ciph_ctx; 2340 const EVP_CIPHER *enc = NULL; 2341 unsigned char iv[EVP_MAX_IV_LENGTH]; 2342 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; 2343 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH 2344 + EVP_MAX_IV_LENGTH]; 2345 int padl, outl = sizeof(epms); 2346 2347 EVP_CIPHER_CTX_init(&ciph_ctx); 2348 2349#ifdef KSSL_DEBUG 2350 printf("ssl3_send_client_key_exchange(%lx & %lx)\n", 2351 alg_k, SSL_kKRB5); 2352#endif /* KSSL_DEBUG */ 2353 2354 authp = NULL; 2355#ifdef KRB5SENDAUTH 2356 if (KRB5SENDAUTH) authp = &authenticator; 2357#endif /* KRB5SENDAUTH */ 2358 2359 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp, 2360 &kssl_err); 2361 enc = kssl_map_enc(kssl_ctx->enctype); 2362 if (enc == NULL) 2363 goto err; 2364#ifdef KSSL_DEBUG 2365 { 2366 printf("kssl_cget_tkt rtn %d\n", krb5rc); 2367 if (krb5rc && kssl_err.text) 2368 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text); 2369 } 2370#endif /* KSSL_DEBUG */ 2371 2372 if (krb5rc) 2373 { 2374 ssl3_send_alert(s,SSL3_AL_FATAL, 2375 SSL_AD_HANDSHAKE_FAILURE); 2376 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2377 kssl_err.reason); 2378 goto err; 2379 } 2380 2381 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ 2382 ** in place of RFC 2712 KerberosWrapper, as in: 2383 ** 2384 ** Send ticket (copy to *p, set n = length) 2385 ** n = krb5_ap_req.length; 2386 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length); 2387 ** if (krb5_ap_req.data) 2388 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req); 2389 ** 2390 ** Now using real RFC 2712 KerberosWrapper 2391 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>) 2392 ** Note: 2712 "opaque" types are here replaced 2393 ** with a 2-byte length followed by the value. 2394 ** Example: 2395 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms 2396 ** Where "xx xx" = length bytes. Shown here with 2397 ** optional authenticator omitted. 2398 */ 2399 2400 /* KerberosWrapper.Ticket */ 2401 s2n(enc_ticket->length,p); 2402 memcpy(p, enc_ticket->data, enc_ticket->length); 2403 p+= enc_ticket->length; 2404 n = enc_ticket->length + 2; 2405 2406 /* KerberosWrapper.Authenticator */ 2407 if (authp && authp->length) 2408 { 2409 s2n(authp->length,p); 2410 memcpy(p, authp->data, authp->length); 2411 p+= authp->length; 2412 n+= authp->length + 2; 2413 2414 free(authp->data); 2415 authp->data = NULL; 2416 authp->length = 0; 2417 } 2418 else 2419 { 2420 s2n(0,p);/* null authenticator length */ 2421 n+=2; 2422 } 2423 2424 tmp_buf[0]=s->client_version>>8; 2425 tmp_buf[1]=s->client_version&0xff; 2426 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0) 2427 goto err; 2428 2429 /* 20010420 VRS. Tried it this way; failed. 2430 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL); 2431 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx, 2432 ** kssl_ctx->length); 2433 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv); 2434 */ 2435 2436 memset(iv, 0, sizeof iv); /* per RFC 1510 */ 2437 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL, 2438 kssl_ctx->key,iv); 2439 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf, 2440 sizeof tmp_buf); 2441 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl); 2442 outl += padl; 2443 if (outl > (int)sizeof epms) 2444 { 2445 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); 2446 goto err; 2447 } 2448 EVP_CIPHER_CTX_cleanup(&ciph_ctx); 2449 2450 /* KerberosWrapper.EncryptedPreMasterSecret */ 2451 s2n(outl,p); 2452 memcpy(p, epms, outl); 2453 p+=outl; 2454 n+=outl + 2; 2455 2456 s->session->master_key_length= 2457 s->method->ssl3_enc->generate_master_secret(s, 2458 s->session->master_key, 2459 tmp_buf, sizeof tmp_buf); 2460 2461 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf); 2462 OPENSSL_cleanse(epms, outl); 2463 } 2464#endif 2465#ifndef OPENSSL_NO_DH 2466 else if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) 2467 { 2468 DH *dh_srvr,*dh_clnt; 2469 2470 if (s->session->sess_cert == NULL) 2471 { 2472 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 2473 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE); 2474 goto err; 2475 } 2476 2477 if (s->session->sess_cert->peer_dh_tmp != NULL) 2478 dh_srvr=s->session->sess_cert->peer_dh_tmp; 2479 else 2480 { 2481 /* we get them from the cert */ 2482 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); 2483 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS); 2484 goto err; 2485 } 2486 2487 /* generate a new random key */ 2488 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL) 2489 { 2490 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 2491 goto err; 2492 } 2493 if (!DH_generate_key(dh_clnt)) 2494 { 2495 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 2496 DH_free(dh_clnt); 2497 goto err; 2498 } 2499 2500 /* use the 'p' output buffer for the DH key, but 2501 * make sure to clear it out afterwards */ 2502 2503 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt); 2504 2505 if (n <= 0) 2506 { 2507 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 2508 DH_free(dh_clnt); 2509 goto err; 2510 } 2511 2512 /* generate master key from the result */ 2513 s->session->master_key_length= 2514 s->method->ssl3_enc->generate_master_secret(s, 2515 s->session->master_key,p,n); 2516 /* clean up */ 2517 memset(p,0,n); 2518 2519 /* send off the data */ 2520 n=BN_num_bytes(dh_clnt->pub_key); 2521 s2n(n,p); 2522 BN_bn2bin(dh_clnt->pub_key,p); 2523 n+=2; 2524 2525 DH_free(dh_clnt); 2526 2527 /* perhaps clean things up a bit EAY EAY EAY EAY*/ 2528 } 2529#endif 2530 2531#ifndef OPENSSL_NO_ECDH 2532 else if (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)) 2533 { 2534 const EC_GROUP *srvr_group = NULL; 2535 EC_KEY *tkey; 2536 int ecdh_clnt_cert = 0; 2537 int field_size = 0; 2538 2539 if (s->session->sess_cert == NULL) 2540 { 2541 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 2542 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE); 2543 goto err; 2544 } 2545 2546 /* Did we send out the client's 2547 * ECDH share for use in premaster 2548 * computation as part of client certificate? 2549 * If so, set ecdh_clnt_cert to 1. 2550 */ 2551 if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL)) 2552 { 2553 /* XXX: For now, we do not support client 2554 * authentication using ECDH certificates. 2555 * To add such support, one needs to add 2556 * code that checks for appropriate 2557 * conditions and sets ecdh_clnt_cert to 1. 2558 * For example, the cert have an ECC 2559 * key on the same curve as the server's 2560 * and the key should be authorized for 2561 * key agreement. 2562 * 2563 * One also needs to add code in ssl3_connect 2564 * to skip sending the certificate verify 2565 * message. 2566 * 2567 * if ((s->cert->key->privatekey != NULL) && 2568 * (s->cert->key->privatekey->type == 2569 * EVP_PKEY_EC) && ...) 2570 * ecdh_clnt_cert = 1; 2571 */ 2572 } 2573 2574 if (s->session->sess_cert->peer_ecdh_tmp != NULL) 2575 { 2576 tkey = s->session->sess_cert->peer_ecdh_tmp; 2577 } 2578 else 2579 { 2580 /* Get the Server Public Key from Cert */ 2581 srvr_pub_pkey = X509_get_pubkey(s->session-> \ 2582 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509); 2583 if ((srvr_pub_pkey == NULL) || 2584 (srvr_pub_pkey->type != EVP_PKEY_EC) || 2585 (srvr_pub_pkey->pkey.ec == NULL)) 2586 { 2587 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2588 ERR_R_INTERNAL_ERROR); 2589 goto err; 2590 } 2591 2592 tkey = srvr_pub_pkey->pkey.ec; 2593 } 2594 2595 srvr_group = EC_KEY_get0_group(tkey); 2596 srvr_ecpoint = EC_KEY_get0_public_key(tkey); 2597 2598 if ((srvr_group == NULL) || (srvr_ecpoint == NULL)) 2599 { 2600 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2601 ERR_R_INTERNAL_ERROR); 2602 goto err; 2603 } 2604 2605 if ((clnt_ecdh=EC_KEY_new()) == NULL) 2606 { 2607 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2608 goto err; 2609 } 2610 2611 if (!EC_KEY_set_group(clnt_ecdh, srvr_group)) 2612 { 2613 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB); 2614 goto err; 2615 } 2616 if (ecdh_clnt_cert) 2617 { 2618 /* Reuse key info from our certificate 2619 * We only need our private key to perform 2620 * the ECDH computation. 2621 */ 2622 const BIGNUM *priv_key; 2623 tkey = s->cert->key->privatekey->pkey.ec; 2624 priv_key = EC_KEY_get0_private_key(tkey); 2625 if (priv_key == NULL) 2626 { 2627 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2628 goto err; 2629 } 2630 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key)) 2631 { 2632 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB); 2633 goto err; 2634 } 2635 } 2636 else 2637 { 2638 /* Generate a new ECDH key pair */ 2639 if (!(EC_KEY_generate_key(clnt_ecdh))) 2640 { 2641 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB); 2642 goto err; 2643 } 2644 } 2645 2646 /* use the 'p' output buffer for the ECDH key, but 2647 * make sure to clear it out afterwards 2648 */ 2649 2650 field_size = EC_GROUP_get_degree(srvr_group); 2651 if (field_size <= 0) 2652 { 2653 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2654 ERR_R_ECDH_LIB); 2655 goto err; 2656 } 2657 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL); 2658 if (n <= 0) 2659 { 2660 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2661 ERR_R_ECDH_LIB); 2662 goto err; 2663 } 2664 2665 /* generate master key from the result */ 2666 s->session->master_key_length = s->method->ssl3_enc \ 2667 -> generate_master_secret(s, 2668 s->session->master_key, 2669 p, n); 2670 2671 memset(p, 0, n); /* clean up */ 2672 2673 if (ecdh_clnt_cert) 2674 { 2675 /* Send empty client key exch message */ 2676 n = 0; 2677 } 2678 else 2679 { 2680 /* First check the size of encoding and 2681 * allocate memory accordingly. 2682 */ 2683 encoded_pt_len = 2684 EC_POINT_point2oct(srvr_group, 2685 EC_KEY_get0_public_key(clnt_ecdh), 2686 POINT_CONVERSION_UNCOMPRESSED, 2687 NULL, 0, NULL); 2688 2689 encodedPoint = (unsigned char *) 2690 OPENSSL_malloc(encoded_pt_len * 2691 sizeof(unsigned char)); 2692 bn_ctx = BN_CTX_new(); 2693 if ((encodedPoint == NULL) || 2694 (bn_ctx == NULL)) 2695 { 2696 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2697 goto err; 2698 } 2699 2700 /* Encode the public key */ 2701 n = EC_POINT_point2oct(srvr_group, 2702 EC_KEY_get0_public_key(clnt_ecdh), 2703 POINT_CONVERSION_UNCOMPRESSED, 2704 encodedPoint, encoded_pt_len, bn_ctx); 2705 2706 *p = n; /* length of encoded point */ 2707 /* Encoded point will be copied here */ 2708 p += 1; 2709 /* copy the point */ 2710 memcpy((unsigned char *)p, encodedPoint, n); 2711 /* increment n to account for length field */ 2712 n += 1; 2713 } 2714 2715 /* Free allocated memory */ 2716 BN_CTX_free(bn_ctx); 2717 if (encodedPoint != NULL) OPENSSL_free(encodedPoint); 2718 if (clnt_ecdh != NULL) 2719 EC_KEY_free(clnt_ecdh); 2720 EVP_PKEY_free(srvr_pub_pkey); 2721 } 2722#endif /* !OPENSSL_NO_ECDH */ 2723 else if (alg_k & SSL_kGOST) 2724 { 2725 /* GOST key exchange message creation */ 2726 EVP_PKEY_CTX *pkey_ctx; 2727 X509 *peer_cert; 2728 size_t msglen; 2729 unsigned int md_len; 2730 int keytype; 2731 unsigned char premaster_secret[32],shared_ukm[32], tmp[256]; 2732 EVP_MD_CTX *ukm_hash; 2733 EVP_PKEY *pub_key; 2734 2735 /* Get server sertificate PKEY and create ctx from it */ 2736 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST01)].x509; 2737 if (!peer_cert) 2738 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST94)].x509; 2739 if (!peer_cert) { 2740 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER); 2741 goto err; 2742 } 2743 2744 pkey_ctx=EVP_PKEY_CTX_new(pub_key=X509_get_pubkey(peer_cert),NULL); 2745 /* If we have send a certificate, and certificate key 2746 2747 * parameters match those of server certificate, use 2748 * certificate key for key exchange 2749 */ 2750 2751 /* Otherwise, generate ephemeral key pair */ 2752 2753 EVP_PKEY_encrypt_init(pkey_ctx); 2754 /* Generate session key */ 2755 RAND_bytes(premaster_secret,32); 2756 /* If we have client certificate, use its secret as peer key */ 2757 if (s->s3->tmp.cert_req && s->cert->key->privatekey) { 2758 if (EVP_PKEY_derive_set_peer(pkey_ctx,s->cert->key->privatekey) <=0) { 2759 /* If there was an error - just ignore it. Ephemeral key 2760 * would be used 2761 */ 2762 ERR_clear_error(); 2763 } 2764 } 2765 /* Compute shared IV and store it in algorithm-specific 2766 * context data */ 2767 ukm_hash = EVP_MD_CTX_create(); 2768 EVP_DigestInit(ukm_hash,EVP_get_digestbynid(NID_id_GostR3411_94)); 2769 EVP_DigestUpdate(ukm_hash,s->s3->client_random,SSL3_RANDOM_SIZE); 2770 EVP_DigestUpdate(ukm_hash,s->s3->server_random,SSL3_RANDOM_SIZE); 2771 EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len); 2772 EVP_MD_CTX_destroy(ukm_hash); 2773 if (EVP_PKEY_CTX_ctrl(pkey_ctx,-1,EVP_PKEY_OP_ENCRYPT,EVP_PKEY_CTRL_SET_IV, 2774 8,shared_ukm)<0) { 2775 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2776 SSL_R_LIBRARY_BUG); 2777 goto err; 2778 } 2779 /* Make GOST keytransport blob message */ 2780 /*Encapsulate it into sequence */ 2781 *(p++)=V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED; 2782 msglen=255; 2783 if (EVP_PKEY_encrypt(pkey_ctx,tmp,&msglen,premaster_secret,32)<0) { 2784 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2785 SSL_R_LIBRARY_BUG); 2786 goto err; 2787 } 2788 if (msglen >= 0x80) 2789 { 2790 *(p++)=0x81; 2791 *(p++)= msglen & 0xff; 2792 n=msglen+3; 2793 } 2794 else 2795 { 2796 *(p++)= msglen & 0xff; 2797 n=msglen+2; 2798 } 2799 memcpy(p, tmp, msglen); 2800 /* Check if pubkey from client certificate was used */ 2801 if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0) 2802 { 2803 /* Set flag "skip certificate verify" */ 2804 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY; 2805 } 2806 EVP_PKEY_CTX_free(pkey_ctx); 2807 s->session->master_key_length= 2808 s->method->ssl3_enc->generate_master_secret(s, 2809 s->session->master_key,premaster_secret,32); 2810 EVP_PKEY_free(pub_key); 2811 2812 } 2813#ifndef OPENSSL_NO_SRP 2814 else if (alg_k & SSL_kSRP) 2815 { 2816 if (s->srp_ctx.A != NULL) 2817 { 2818 /* send off the data */ 2819 n=BN_num_bytes(s->srp_ctx.A); 2820 s2n(n,p); 2821 BN_bn2bin(s->srp_ctx.A,p); 2822 n+=2; 2823 } 2824 else 2825 { 2826 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 2827 goto err; 2828 } 2829 if (s->session->srp_username != NULL) 2830 OPENSSL_free(s->session->srp_username); 2831 s->session->srp_username = BUF_strdup(s->srp_ctx.login); 2832 if (s->session->srp_username == NULL) 2833 { 2834 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2835 ERR_R_MALLOC_FAILURE); 2836 goto err; 2837 } 2838 2839 if ((s->session->master_key_length = SRP_generate_client_master_secret(s,s->session->master_key))<0) 2840 { 2841 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 2842 goto err; 2843 } 2844 } 2845#endif 2846#ifndef OPENSSL_NO_PSK 2847 else if (alg_k & SSL_kPSK) 2848 { 2849 char identity[PSK_MAX_IDENTITY_LEN]; 2850 unsigned char *t = NULL; 2851 unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4]; 2852 unsigned int pre_ms_len = 0, psk_len = 0; 2853 int psk_err = 1; 2854 2855 n = 0; 2856 if (s->psk_client_callback == NULL) 2857 { 2858 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2859 SSL_R_PSK_NO_CLIENT_CB); 2860 goto err; 2861 } 2862 2863 psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint, 2864 identity, PSK_MAX_IDENTITY_LEN, 2865 psk_or_pre_ms, sizeof(psk_or_pre_ms)); 2866 if (psk_len > PSK_MAX_PSK_LEN) 2867 { 2868 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2869 ERR_R_INTERNAL_ERROR); 2870 goto psk_err; 2871 } 2872 else if (psk_len == 0) 2873 { 2874 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2875 SSL_R_PSK_IDENTITY_NOT_FOUND); 2876 goto psk_err; 2877 } 2878 2879 /* create PSK pre_master_secret */ 2880 pre_ms_len = 2+psk_len+2+psk_len; 2881 t = psk_or_pre_ms; 2882 memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len); 2883 s2n(psk_len, t); 2884 memset(t, 0, psk_len); 2885 t+=psk_len; 2886 s2n(psk_len, t); 2887 2888 if (s->session->psk_identity_hint != NULL) 2889 OPENSSL_free(s->session->psk_identity_hint); 2890 s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint); 2891 if (s->ctx->psk_identity_hint != NULL && 2892 s->session->psk_identity_hint == NULL) 2893 { 2894 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2895 ERR_R_MALLOC_FAILURE); 2896 goto psk_err; 2897 } 2898 2899 if (s->session->psk_identity != NULL) 2900 OPENSSL_free(s->session->psk_identity); 2901 s->session->psk_identity = BUF_strdup(identity); 2902 if (s->session->psk_identity == NULL) 2903 { 2904 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2905 ERR_R_MALLOC_FAILURE); 2906 goto psk_err; 2907 } 2908 2909 s->session->master_key_length = 2910 s->method->ssl3_enc->generate_master_secret(s, 2911 s->session->master_key, 2912 psk_or_pre_ms, pre_ms_len); 2913 n = strlen(identity); 2914 s2n(n, p); 2915 memcpy(p, identity, n); 2916 n+=2; 2917 psk_err = 0; 2918 psk_err: 2919 OPENSSL_cleanse(identity, PSK_MAX_IDENTITY_LEN); 2920 OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms)); 2921 if (psk_err != 0) 2922 { 2923 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); 2924 goto err; 2925 } 2926 } 2927#endif 2928 else 2929 { 2930 ssl3_send_alert(s, SSL3_AL_FATAL, 2931 SSL_AD_HANDSHAKE_FAILURE); 2932 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2933 ERR_R_INTERNAL_ERROR); 2934 goto err; 2935 } 2936 2937 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE; 2938 l2n3(n,d); 2939 2940 s->state=SSL3_ST_CW_KEY_EXCH_B; 2941 /* number of bytes to write */ 2942 s->init_num=n+4; 2943 s->init_off=0; 2944 } 2945 2946 /* SSL3_ST_CW_KEY_EXCH_B */ 2947 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 2948err: 2949#ifndef OPENSSL_NO_ECDH 2950 BN_CTX_free(bn_ctx); 2951 if (encodedPoint != NULL) OPENSSL_free(encodedPoint); 2952 if (clnt_ecdh != NULL) 2953 EC_KEY_free(clnt_ecdh); 2954 EVP_PKEY_free(srvr_pub_pkey); 2955#endif 2956 return(-1); 2957 } 2958 2959int ssl3_send_client_verify(SSL *s) 2960 { 2961 unsigned char *p,*d; 2962 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH]; 2963 EVP_PKEY *pkey; 2964 EVP_PKEY_CTX *pctx=NULL; 2965 EVP_MD_CTX mctx; 2966 unsigned u=0; 2967 unsigned long n; 2968 int j; 2969 2970 EVP_MD_CTX_init(&mctx); 2971 2972 if (s->state == SSL3_ST_CW_CERT_VRFY_A) 2973 { 2974 d=(unsigned char *)s->init_buf->data; 2975 p= &(d[4]); 2976 pkey=s->cert->key->privatekey; 2977/* Create context from key and test if sha1 is allowed as digest */ 2978 pctx = EVP_PKEY_CTX_new(pkey,NULL); 2979 EVP_PKEY_sign_init(pctx); 2980 if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1())>0) 2981 { 2982 if (TLS1_get_version(s) < TLS1_2_VERSION) 2983 s->method->ssl3_enc->cert_verify_mac(s, 2984 NID_sha1, 2985 &(data[MD5_DIGEST_LENGTH])); 2986 } 2987 else 2988 { 2989 ERR_clear_error(); 2990 } 2991 /* For TLS v1.2 send signature algorithm and signature 2992 * using agreed digest and cached handshake records. 2993 */ 2994 if (TLS1_get_version(s) >= TLS1_2_VERSION) 2995 { 2996 long hdatalen = 0; 2997 void *hdata; 2998 const EVP_MD *md = s->cert->key->digest; 2999 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, 3000 &hdata); 3001 if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md)) 3002 { 3003 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, 3004 ERR_R_INTERNAL_ERROR); 3005 goto err; 3006 } 3007 p += 2; 3008#ifdef SSL_DEBUG 3009 fprintf(stderr, "Using TLS 1.2 with client alg %s\n", 3010 EVP_MD_name(md)); 3011#endif 3012 if (!EVP_SignInit_ex(&mctx, md, NULL) 3013 || !EVP_SignUpdate(&mctx, hdata, hdatalen) 3014 || !EVP_SignFinal(&mctx, p + 2, &u, pkey)) 3015 { 3016 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, 3017 ERR_R_EVP_LIB); 3018 goto err; 3019 } 3020 s2n(u,p); 3021 n = u + 4; 3022 if (!ssl3_digest_cached_records(s)) 3023 goto err; 3024 } 3025 else 3026#ifndef OPENSSL_NO_RSA 3027 if (pkey->type == EVP_PKEY_RSA) 3028 { 3029 s->method->ssl3_enc->cert_verify_mac(s, 3030 NID_md5, 3031 &(data[0])); 3032 if (RSA_sign(NID_md5_sha1, data, 3033 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH, 3034 &(p[2]), &u, pkey->pkey.rsa) <= 0 ) 3035 { 3036 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB); 3037 goto err; 3038 } 3039 s2n(u,p); 3040 n=u+2; 3041 } 3042 else 3043#endif 3044#ifndef OPENSSL_NO_DSA 3045 if (pkey->type == EVP_PKEY_DSA) 3046 { 3047 if (!DSA_sign(pkey->save_type, 3048 &(data[MD5_DIGEST_LENGTH]), 3049 SHA_DIGEST_LENGTH,&(p[2]), 3050 (unsigned int *)&j,pkey->pkey.dsa)) 3051 { 3052 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB); 3053 goto err; 3054 } 3055 s2n(j,p); 3056 n=j+2; 3057 } 3058 else 3059#endif 3060#ifndef OPENSSL_NO_ECDSA 3061 if (pkey->type == EVP_PKEY_EC) 3062 { 3063 if (!ECDSA_sign(pkey->save_type, 3064 &(data[MD5_DIGEST_LENGTH]), 3065 SHA_DIGEST_LENGTH,&(p[2]), 3066 (unsigned int *)&j,pkey->pkey.ec)) 3067 { 3068 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, 3069 ERR_R_ECDSA_LIB); 3070 goto err; 3071 } 3072 s2n(j,p); 3073 n=j+2; 3074 } 3075 else 3076#endif 3077 if (pkey->type == NID_id_GostR3410_94 || pkey->type == NID_id_GostR3410_2001) 3078 { 3079 unsigned char signbuf[64]; 3080 int i; 3081 size_t sigsize=64; 3082 s->method->ssl3_enc->cert_verify_mac(s, 3083 NID_id_GostR3411_94, 3084 data); 3085 if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) { 3086 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, 3087 ERR_R_INTERNAL_ERROR); 3088 goto err; 3089 } 3090 for (i=63,j=0; i>=0; j++, i--) { 3091 p[2+j]=signbuf[i]; 3092 } 3093 s2n(j,p); 3094 n=j+2; 3095 } 3096 else 3097 { 3098 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR); 3099 goto err; 3100 } 3101 *(d++)=SSL3_MT_CERTIFICATE_VERIFY; 3102 l2n3(n,d); 3103 3104 s->state=SSL3_ST_CW_CERT_VRFY_B; 3105 s->init_num=(int)n+4; 3106 s->init_off=0; 3107 } 3108 EVP_MD_CTX_cleanup(&mctx); 3109 EVP_PKEY_CTX_free(pctx); 3110 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 3111err: 3112 EVP_MD_CTX_cleanup(&mctx); 3113 EVP_PKEY_CTX_free(pctx); 3114 return(-1); 3115 } 3116 3117int ssl3_send_client_certificate(SSL *s) 3118 { 3119 X509 *x509=NULL; 3120 EVP_PKEY *pkey=NULL; 3121 int i; 3122 unsigned long l; 3123 3124 if (s->state == SSL3_ST_CW_CERT_A) 3125 { 3126 if ((s->cert == NULL) || 3127 (s->cert->key->x509 == NULL) || 3128 (s->cert->key->privatekey == NULL)) 3129 s->state=SSL3_ST_CW_CERT_B; 3130 else 3131 s->state=SSL3_ST_CW_CERT_C; 3132 } 3133 3134 /* We need to get a client cert */ 3135 if (s->state == SSL3_ST_CW_CERT_B) 3136 { 3137 /* If we get an error, we need to 3138 * ssl->rwstate=SSL_X509_LOOKUP; return(-1); 3139 * We then get retied later */ 3140 i=0; 3141 i = ssl_do_client_cert_cb(s, &x509, &pkey); 3142 if (i < 0) 3143 { 3144 s->rwstate=SSL_X509_LOOKUP; 3145 return(-1); 3146 } 3147 s->rwstate=SSL_NOTHING; 3148 if ((i == 1) && (pkey != NULL) && (x509 != NULL)) 3149 { 3150 s->state=SSL3_ST_CW_CERT_B; 3151 if ( !SSL_use_certificate(s,x509) || 3152 !SSL_use_PrivateKey(s,pkey)) 3153 i=0; 3154 } 3155 else if (i == 1) 3156 { 3157 i=0; 3158 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); 3159 } 3160 3161 if (x509 != NULL) X509_free(x509); 3162 if (pkey != NULL) EVP_PKEY_free(pkey); 3163 if (i == 0) 3164 { 3165 if (s->version == SSL3_VERSION) 3166 { 3167 s->s3->tmp.cert_req=0; 3168 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE); 3169 return(1); 3170 } 3171 else 3172 { 3173 s->s3->tmp.cert_req=2; 3174 } 3175 } 3176 3177 /* Ok, we have a cert */ 3178 s->state=SSL3_ST_CW_CERT_C; 3179 } 3180 3181 if (s->state == SSL3_ST_CW_CERT_C) 3182 { 3183 s->state=SSL3_ST_CW_CERT_D; 3184 l=ssl3_output_cert_chain(s, 3185 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509); 3186 s->init_num=(int)l; 3187 s->init_off=0; 3188 } 3189 /* SSL3_ST_CW_CERT_D */ 3190 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 3191 } 3192 3193#define has_bits(i,m) (((i)&(m)) == (m)) 3194 3195int ssl3_check_cert_and_algorithm(SSL *s) 3196 { 3197 int i,idx; 3198 long alg_k,alg_a; 3199 EVP_PKEY *pkey=NULL; 3200 SESS_CERT *sc; 3201#ifndef OPENSSL_NO_RSA 3202 RSA *rsa; 3203#endif 3204#ifndef OPENSSL_NO_DH 3205 DH *dh; 3206#endif 3207 3208 alg_k=s->s3->tmp.new_cipher->algorithm_mkey; 3209 alg_a=s->s3->tmp.new_cipher->algorithm_auth; 3210 3211 /* we don't have a certificate */ 3212 if ((alg_a & (SSL_aDH|SSL_aNULL|SSL_aKRB5)) || (alg_k & SSL_kPSK)) 3213 return(1); 3214 3215 sc=s->session->sess_cert; 3216 if (sc == NULL) 3217 { 3218 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR); 3219 goto err; 3220 } 3221 3222#ifndef OPENSSL_NO_RSA 3223 rsa=s->session->sess_cert->peer_rsa_tmp; 3224#endif 3225#ifndef OPENSSL_NO_DH 3226 dh=s->session->sess_cert->peer_dh_tmp; 3227#endif 3228 3229 /* This is the passed certificate */ 3230 3231 idx=sc->peer_cert_type; 3232#ifndef OPENSSL_NO_ECDH 3233 if (idx == SSL_PKEY_ECC) 3234 { 3235 if (ssl_check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509, 3236 s) == 0) 3237 { /* check failed */ 3238 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT); 3239 goto f_err; 3240 } 3241 else 3242 { 3243 return 1; 3244 } 3245 } 3246#endif 3247 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509); 3248 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey); 3249 EVP_PKEY_free(pkey); 3250 3251 3252 /* Check that we have a certificate if we require one */ 3253 if ((alg_a & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN)) 3254 { 3255 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT); 3256 goto f_err; 3257 } 3258#ifndef OPENSSL_NO_DSA 3259 else if ((alg_a & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN)) 3260 { 3261 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT); 3262 goto f_err; 3263 } 3264#endif 3265#ifndef OPENSSL_NO_RSA 3266 if ((alg_k & SSL_kRSA) && 3267 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL))) 3268 { 3269 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT); 3270 goto f_err; 3271 } 3272#endif 3273#ifndef OPENSSL_NO_DH 3274 if ((alg_k & SSL_kEDH) && 3275 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL))) 3276 { 3277 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY); 3278 goto f_err; 3279 } 3280 else if ((alg_k & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA)) 3281 { 3282 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT); 3283 goto f_err; 3284 } 3285#ifndef OPENSSL_NO_DSA 3286 else if ((alg_k & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA)) 3287 { 3288 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT); 3289 goto f_err; 3290 } 3291#endif 3292#endif 3293 3294 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP)) 3295 { 3296#ifndef OPENSSL_NO_RSA 3297 if (alg_k & SSL_kRSA) 3298 { 3299 if (rsa == NULL 3300 || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) 3301 { 3302 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY); 3303 goto f_err; 3304 } 3305 } 3306 else 3307#endif 3308#ifndef OPENSSL_NO_DH 3309 if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) 3310 { 3311 if (dh == NULL 3312 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) 3313 { 3314 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY); 3315 goto f_err; 3316 } 3317 } 3318 else 3319#endif 3320 { 3321 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE); 3322 goto f_err; 3323 } 3324 } 3325 return(1); 3326f_err: 3327 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); 3328err: 3329 return(0); 3330 } 3331 3332#if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG) 3333int ssl3_send_next_proto(SSL *s) 3334 { 3335 unsigned int len, padding_len; 3336 unsigned char *d; 3337 3338 if (s->state == SSL3_ST_CW_NEXT_PROTO_A) 3339 { 3340 len = s->next_proto_negotiated_len; 3341 padding_len = 32 - ((len + 2) % 32); 3342 d = (unsigned char *)s->init_buf->data; 3343 d[4] = len; 3344 memcpy(d + 5, s->next_proto_negotiated, len); 3345 d[5 + len] = padding_len; 3346 memset(d + 6 + len, 0, padding_len); 3347 *(d++)=SSL3_MT_NEXT_PROTO; 3348 l2n3(2 + len + padding_len, d); 3349 s->state = SSL3_ST_CW_NEXT_PROTO_B; 3350 s->init_num = 4 + 2 + len + padding_len; 3351 s->init_off = 0; 3352 } 3353 3354 return ssl3_do_write(s, SSL3_RT_HANDSHAKE); 3355} 3356#endif /* !OPENSSL_NO_TLSEXT && !OPENSSL_NO_NEXTPROTONEG */ 3357 3358/* Check to see if handshake is full or resumed. Usually this is just a 3359 * case of checking to see if a cache hit has occurred. In the case of 3360 * session tickets we have to check the next message to be sure. 3361 */ 3362 3363#ifndef OPENSSL_NO_TLSEXT 3364int ssl3_check_finished(SSL *s) 3365 { 3366 int ok; 3367 long n; 3368 /* If we have no ticket it cannot be a resumed session. */ 3369 if (!s->session->tlsext_tick) 3370 return 1; 3371 /* this function is called when we really expect a Certificate 3372 * message, so permit appropriate message length */ 3373 n=s->method->ssl_get_message(s, 3374 SSL3_ST_CR_CERT_A, 3375 SSL3_ST_CR_CERT_B, 3376 -1, 3377 s->max_cert_list, 3378 &ok); 3379 if (!ok) return((int)n); 3380 s->s3->tmp.reuse_message = 1; 3381 if ((s->s3->tmp.message_type == SSL3_MT_FINISHED) 3382 || (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET)) 3383 return 2; 3384 3385 return 1; 3386 } 3387#endif 3388 3389int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey) 3390 { 3391 int i = 0; 3392#ifndef OPENSSL_NO_ENGINE 3393 if (s->ctx->client_cert_engine) 3394 { 3395 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s, 3396 SSL_get_client_CA_list(s), 3397 px509, ppkey, NULL, NULL, NULL); 3398 if (i != 0) 3399 return i; 3400 } 3401#endif 3402 if (s->ctx->client_cert_cb) 3403 i = s->ctx->client_cert_cb(s,px509,ppkey); 3404 return i; 3405 } 3406