s3_clnt.c revision 277195
1/* ssl/s3_clnt.c */ 2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay@cryptsoft.com). 7 * The implementation was written so as to conform with Netscapes SSL. 8 * 9 * This library is free for commercial and non-commercial use as long as 10 * the following conditions are aheared to. The following conditions 11 * apply to all code found in this distribution, be it the RC4, RSA, 12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13 * included with this distribution is covered by the same copyright terms 14 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15 * 16 * Copyright remains Eric Young's, and as such any Copyright notices in 17 * the code are not to be removed. 18 * If this package is used in a product, Eric Young should be given attribution 19 * as the author of the parts of the library used. 20 * This can be in the form of a textual message at program startup or 21 * in documentation (online or textual) provided with the package. 22 * 23 * Redistribution and use in source and binary forms, with or without 24 * modification, are permitted provided that the following conditions 25 * are met: 26 * 1. Redistributions of source code must retain the copyright 27 * notice, this list of conditions and the following disclaimer. 28 * 2. Redistributions in binary form must reproduce the above copyright 29 * notice, this list of conditions and the following disclaimer in the 30 * documentation and/or other materials provided with the distribution. 31 * 3. All advertising materials mentioning features or use of this software 32 * must display the following acknowledgement: 33 * "This product includes cryptographic software written by 34 * Eric Young (eay@cryptsoft.com)" 35 * The word 'cryptographic' can be left out if the rouines from the library 36 * being used are not cryptographic related :-). 37 * 4. If you include any Windows specific code (or a derivative thereof) from 38 * the apps directory (application code) you must include an acknowledgement: 39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40 * 41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51 * SUCH DAMAGE. 52 * 53 * The licence and distribution terms for any publically available version or 54 * derivative of this code cannot be changed. i.e. this code cannot simply be 55 * copied and put under another distribution licence 56 * [including the GNU Public Licence.] 57 */ 58/* ==================================================================== 59 * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved. 60 * 61 * Redistribution and use in source and binary forms, with or without 62 * modification, are permitted provided that the following conditions 63 * are met: 64 * 65 * 1. Redistributions of source code must retain the above copyright 66 * notice, this list of conditions and the following disclaimer. 67 * 68 * 2. Redistributions in binary form must reproduce the above copyright 69 * notice, this list of conditions and the following disclaimer in 70 * the documentation and/or other materials provided with the 71 * distribution. 72 * 73 * 3. All advertising materials mentioning features or use of this 74 * software must display the following acknowledgment: 75 * "This product includes software developed by the OpenSSL Project 76 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" 77 * 78 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 79 * endorse or promote products derived from this software without 80 * prior written permission. For written permission, please contact 81 * openssl-core@openssl.org. 82 * 83 * 5. Products derived from this software may not be called "OpenSSL" 84 * nor may "OpenSSL" appear in their names without prior written 85 * permission of the OpenSSL Project. 86 * 87 * 6. Redistributions of any form whatsoever must retain the following 88 * acknowledgment: 89 * "This product includes software developed by the OpenSSL Project 90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)" 91 * 92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 103 * OF THE POSSIBILITY OF SUCH DAMAGE. 104 * ==================================================================== 105 * 106 * This product includes cryptographic software written by Eric Young 107 * (eay@cryptsoft.com). This product includes software written by Tim 108 * Hudson (tjh@cryptsoft.com). 109 * 110 */ 111/* ==================================================================== 112 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. 113 * 114 * Portions of the attached software ("Contribution") are developed by 115 * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project. 116 * 117 * The Contribution is licensed pursuant to the OpenSSL open source 118 * license provided above. 119 * 120 * ECC cipher suite support in OpenSSL originally written by 121 * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories. 122 * 123 */ 124/* ==================================================================== 125 * Copyright 2005 Nokia. All rights reserved. 126 * 127 * The portions of the attached software ("Contribution") is developed by 128 * Nokia Corporation and is licensed pursuant to the OpenSSL open source 129 * license. 130 * 131 * The Contribution, originally written by Mika Kousa and Pasi Eronen of 132 * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites 133 * support (see RFC 4279) to OpenSSL. 134 * 135 * No patent licenses or other rights except those expressly stated in 136 * the OpenSSL open source license shall be deemed granted or received 137 * expressly, by implication, estoppel, or otherwise. 138 * 139 * No assurances are provided by Nokia that the Contribution does not 140 * infringe the patent or other intellectual property rights of any third 141 * party or that the license provides you with all the necessary rights 142 * to make use of the Contribution. 143 * 144 * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN 145 * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA 146 * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY 147 * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR 148 * OTHERWISE. 149 */ 150 151#include <stdio.h> 152#include "ssl_locl.h" 153#include "kssl_lcl.h" 154#include <openssl/buffer.h> 155#include <openssl/rand.h> 156#include <openssl/objects.h> 157#include <openssl/evp.h> 158#include <openssl/md5.h> 159#ifdef OPENSSL_FIPS 160#include <openssl/fips.h> 161#endif 162#ifndef OPENSSL_NO_DH 163#include <openssl/dh.h> 164#endif 165#include <openssl/bn.h> 166#ifndef OPENSSL_NO_ENGINE 167#include <openssl/engine.h> 168#endif 169 170static const SSL_METHOD *ssl3_get_client_method(int ver); 171static int ca_dn_cmp(const X509_NAME * const *a,const X509_NAME * const *b); 172 173static const SSL_METHOD *ssl3_get_client_method(int ver) 174 { 175 if (ver == SSL3_VERSION) 176 return(SSLv3_client_method()); 177 else 178 return(NULL); 179 } 180 181IMPLEMENT_ssl3_meth_func(SSLv3_client_method, 182 ssl_undefined_function, 183 ssl3_connect, 184 ssl3_get_client_method) 185 186int ssl3_connect(SSL *s) 187 { 188 BUF_MEM *buf=NULL; 189 unsigned long Time=(unsigned long)time(NULL); 190 void (*cb)(const SSL *ssl,int type,int val)=NULL; 191 int ret= -1; 192 int new_state,state,skip=0; 193 194 RAND_add(&Time,sizeof(Time),0); 195 ERR_clear_error(); 196 clear_sys_error(); 197 198 if (s->info_callback != NULL) 199 cb=s->info_callback; 200 else if (s->ctx->info_callback != NULL) 201 cb=s->ctx->info_callback; 202 203 s->in_handshake++; 204 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); 205 206#ifndef OPENSSL_NO_HEARTBEATS 207 /* If we're awaiting a HeartbeatResponse, pretend we 208 * already got and don't await it anymore, because 209 * Heartbeats don't make sense during handshakes anyway. 210 */ 211 if (s->tlsext_hb_pending) 212 { 213 s->tlsext_hb_pending = 0; 214 s->tlsext_hb_seq++; 215 } 216#endif 217 218 for (;;) 219 { 220 state=s->state; 221 222 switch(s->state) 223 { 224 case SSL_ST_RENEGOTIATE: 225 s->renegotiate=1; 226 s->state=SSL_ST_CONNECT; 227 s->ctx->stats.sess_connect_renegotiate++; 228 /* break */ 229 case SSL_ST_BEFORE: 230 case SSL_ST_CONNECT: 231 case SSL_ST_BEFORE|SSL_ST_CONNECT: 232 case SSL_ST_OK|SSL_ST_CONNECT: 233 234 s->server=0; 235 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1); 236 237 if ((s->version & 0xff00 ) != 0x0300) 238 { 239 SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR); 240 ret = -1; 241 goto end; 242 } 243 244 /* s->version=SSL3_VERSION; */ 245 s->type=SSL_ST_CONNECT; 246 247 if (s->init_buf == NULL) 248 { 249 if ((buf=BUF_MEM_new()) == NULL) 250 { 251 ret= -1; 252 goto end; 253 } 254 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH)) 255 { 256 ret= -1; 257 goto end; 258 } 259 s->init_buf=buf; 260 buf=NULL; 261 } 262 263 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; } 264 265 /* setup buffing BIO */ 266 if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; } 267 268 /* don't push the buffering BIO quite yet */ 269 270 ssl3_init_finished_mac(s); 271 272 s->state=SSL3_ST_CW_CLNT_HELLO_A; 273 s->ctx->stats.sess_connect++; 274 s->init_num=0; 275 break; 276 277 case SSL3_ST_CW_CLNT_HELLO_A: 278 case SSL3_ST_CW_CLNT_HELLO_B: 279 280 s->shutdown=0; 281 ret=ssl3_client_hello(s); 282 if (ret <= 0) goto end; 283 s->state=SSL3_ST_CR_SRVR_HELLO_A; 284 s->init_num=0; 285 286 /* turn on buffering for the next lot of output */ 287 if (s->bbio != s->wbio) 288 s->wbio=BIO_push(s->bbio,s->wbio); 289 290 break; 291 292 case SSL3_ST_CR_SRVR_HELLO_A: 293 case SSL3_ST_CR_SRVR_HELLO_B: 294 ret=ssl3_get_server_hello(s); 295 if (ret <= 0) goto end; 296 297 if (s->hit) 298 { 299 s->state=SSL3_ST_CR_FINISHED_A; 300#ifndef OPENSSL_NO_TLSEXT 301 if (s->tlsext_ticket_expected) 302 { 303 /* receive renewed session ticket */ 304 s->state=SSL3_ST_CR_SESSION_TICKET_A; 305 } 306#endif 307 } 308 else 309 s->state=SSL3_ST_CR_CERT_A; 310 s->init_num=0; 311 break; 312 313 case SSL3_ST_CR_CERT_A: 314 case SSL3_ST_CR_CERT_B: 315#ifndef OPENSSL_NO_TLSEXT 316 ret=ssl3_check_finished(s); 317 if (ret <= 0) goto end; 318 if (ret == 2) 319 { 320 s->hit = 1; 321 if (s->tlsext_ticket_expected) 322 s->state=SSL3_ST_CR_SESSION_TICKET_A; 323 else 324 s->state=SSL3_ST_CR_FINISHED_A; 325 s->init_num=0; 326 break; 327 } 328#endif 329 /* Check if it is anon DH/ECDH */ 330 /* or PSK */ 331 if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) && 332 !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) 333 { 334 ret=ssl3_get_server_certificate(s); 335 if (ret <= 0) goto end; 336#ifndef OPENSSL_NO_TLSEXT 337 if (s->tlsext_status_expected) 338 s->state=SSL3_ST_CR_CERT_STATUS_A; 339 else 340 s->state=SSL3_ST_CR_KEY_EXCH_A; 341 } 342 else 343 { 344 skip = 1; 345 s->state=SSL3_ST_CR_KEY_EXCH_A; 346 } 347#else 348 } 349 else 350 skip=1; 351 352 s->state=SSL3_ST_CR_KEY_EXCH_A; 353#endif 354 s->init_num=0; 355 break; 356 357 case SSL3_ST_CR_KEY_EXCH_A: 358 case SSL3_ST_CR_KEY_EXCH_B: 359 ret=ssl3_get_key_exchange(s); 360 if (ret <= 0) goto end; 361 s->state=SSL3_ST_CR_CERT_REQ_A; 362 s->init_num=0; 363 364 /* at this point we check that we have the 365 * required stuff from the server */ 366 if (!ssl3_check_cert_and_algorithm(s)) 367 { 368 ret= -1; 369 goto end; 370 } 371 break; 372 373 case SSL3_ST_CR_CERT_REQ_A: 374 case SSL3_ST_CR_CERT_REQ_B: 375 ret=ssl3_get_certificate_request(s); 376 if (ret <= 0) goto end; 377 s->state=SSL3_ST_CR_SRVR_DONE_A; 378 s->init_num=0; 379 break; 380 381 case SSL3_ST_CR_SRVR_DONE_A: 382 case SSL3_ST_CR_SRVR_DONE_B: 383 ret=ssl3_get_server_done(s); 384 if (ret <= 0) goto end; 385#ifndef OPENSSL_NO_SRP 386 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) 387 { 388 if ((ret = SRP_Calc_A_param(s))<=0) 389 { 390 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_SRP_A_CALC); 391 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR); 392 goto end; 393 } 394 } 395#endif 396 if (s->s3->tmp.cert_req) 397 s->state=SSL3_ST_CW_CERT_A; 398 else 399 s->state=SSL3_ST_CW_KEY_EXCH_A; 400 s->init_num=0; 401 402 break; 403 404 case SSL3_ST_CW_CERT_A: 405 case SSL3_ST_CW_CERT_B: 406 case SSL3_ST_CW_CERT_C: 407 case SSL3_ST_CW_CERT_D: 408 ret=ssl3_send_client_certificate(s); 409 if (ret <= 0) goto end; 410 s->state=SSL3_ST_CW_KEY_EXCH_A; 411 s->init_num=0; 412 break; 413 414 case SSL3_ST_CW_KEY_EXCH_A: 415 case SSL3_ST_CW_KEY_EXCH_B: 416 ret=ssl3_send_client_key_exchange(s); 417 if (ret <= 0) goto end; 418 /* EAY EAY EAY need to check for DH fix cert 419 * sent back */ 420 /* For TLS, cert_req is set to 2, so a cert chain 421 * of nothing is sent, but no verify packet is sent */ 422 /* XXX: For now, we do not support client 423 * authentication in ECDH cipher suites with 424 * ECDH (rather than ECDSA) certificates. 425 * We need to skip the certificate verify 426 * message when client's ECDH public key is sent 427 * inside the client certificate. 428 */ 429 if (s->s3->tmp.cert_req == 1) 430 { 431 s->state=SSL3_ST_CW_CERT_VRFY_A; 432 } 433 else 434 { 435 s->state=SSL3_ST_CW_CHANGE_A; 436 s->s3->change_cipher_spec=0; 437 } 438 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) 439 { 440 s->state=SSL3_ST_CW_CHANGE_A; 441 s->s3->change_cipher_spec=0; 442 } 443 444 s->init_num=0; 445 break; 446 447 case SSL3_ST_CW_CERT_VRFY_A: 448 case SSL3_ST_CW_CERT_VRFY_B: 449 ret=ssl3_send_client_verify(s); 450 if (ret <= 0) goto end; 451 s->state=SSL3_ST_CW_CHANGE_A; 452 s->init_num=0; 453 s->s3->change_cipher_spec=0; 454 break; 455 456 case SSL3_ST_CW_CHANGE_A: 457 case SSL3_ST_CW_CHANGE_B: 458 ret=ssl3_send_change_cipher_spec(s, 459 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B); 460 if (ret <= 0) goto end; 461 462#if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG) 463 s->state=SSL3_ST_CW_FINISHED_A; 464#else 465 if (s->s3->next_proto_neg_seen) 466 s->state=SSL3_ST_CW_NEXT_PROTO_A; 467 else 468 s->state=SSL3_ST_CW_FINISHED_A; 469#endif 470 s->init_num=0; 471 472 s->session->cipher=s->s3->tmp.new_cipher; 473#ifdef OPENSSL_NO_COMP 474 s->session->compress_meth=0; 475#else 476 if (s->s3->tmp.new_compression == NULL) 477 s->session->compress_meth=0; 478 else 479 s->session->compress_meth= 480 s->s3->tmp.new_compression->id; 481#endif 482 if (!s->method->ssl3_enc->setup_key_block(s)) 483 { 484 ret= -1; 485 goto end; 486 } 487 488 if (!s->method->ssl3_enc->change_cipher_state(s, 489 SSL3_CHANGE_CIPHER_CLIENT_WRITE)) 490 { 491 ret= -1; 492 goto end; 493 } 494 495 break; 496 497#if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG) 498 case SSL3_ST_CW_NEXT_PROTO_A: 499 case SSL3_ST_CW_NEXT_PROTO_B: 500 ret=ssl3_send_next_proto(s); 501 if (ret <= 0) goto end; 502 s->state=SSL3_ST_CW_FINISHED_A; 503 break; 504#endif 505 506 case SSL3_ST_CW_FINISHED_A: 507 case SSL3_ST_CW_FINISHED_B: 508 ret=ssl3_send_finished(s, 509 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B, 510 s->method->ssl3_enc->client_finished_label, 511 s->method->ssl3_enc->client_finished_label_len); 512 if (ret <= 0) goto end; 513 s->state=SSL3_ST_CW_FLUSH; 514 515 /* clear flags */ 516 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER; 517 if (s->hit) 518 { 519 s->s3->tmp.next_state=SSL_ST_OK; 520 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED) 521 { 522 s->state=SSL_ST_OK; 523 s->s3->flags|=SSL3_FLAGS_POP_BUFFER; 524 s->s3->delay_buf_pop_ret=0; 525 } 526 } 527 else 528 { 529#ifndef OPENSSL_NO_TLSEXT 530 /* Allow NewSessionTicket if ticket expected */ 531 if (s->tlsext_ticket_expected) 532 s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A; 533 else 534#endif 535 536 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A; 537 } 538 s->init_num=0; 539 break; 540 541#ifndef OPENSSL_NO_TLSEXT 542 case SSL3_ST_CR_SESSION_TICKET_A: 543 case SSL3_ST_CR_SESSION_TICKET_B: 544 ret=ssl3_get_new_session_ticket(s); 545 if (ret <= 0) goto end; 546 s->state=SSL3_ST_CR_FINISHED_A; 547 s->init_num=0; 548 break; 549 550 case SSL3_ST_CR_CERT_STATUS_A: 551 case SSL3_ST_CR_CERT_STATUS_B: 552 ret=ssl3_get_cert_status(s); 553 if (ret <= 0) goto end; 554 s->state=SSL3_ST_CR_KEY_EXCH_A; 555 s->init_num=0; 556 break; 557#endif 558 559 case SSL3_ST_CR_FINISHED_A: 560 case SSL3_ST_CR_FINISHED_B: 561 562 s->s3->flags |= SSL3_FLAGS_CCS_OK; 563 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A, 564 SSL3_ST_CR_FINISHED_B); 565 if (ret <= 0) goto end; 566 567 if (s->hit) 568 s->state=SSL3_ST_CW_CHANGE_A; 569 else 570 s->state=SSL_ST_OK; 571 s->init_num=0; 572 break; 573 574 case SSL3_ST_CW_FLUSH: 575 s->rwstate=SSL_WRITING; 576 if (BIO_flush(s->wbio) <= 0) 577 { 578 ret= -1; 579 goto end; 580 } 581 s->rwstate=SSL_NOTHING; 582 s->state=s->s3->tmp.next_state; 583 break; 584 585 case SSL_ST_OK: 586 /* clean a few things up */ 587 ssl3_cleanup_key_block(s); 588 589 if (s->init_buf != NULL) 590 { 591 BUF_MEM_free(s->init_buf); 592 s->init_buf=NULL; 593 } 594 595 /* If we are not 'joining' the last two packets, 596 * remove the buffering now */ 597 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER)) 598 ssl_free_wbio_buffer(s); 599 /* else do it later in ssl3_write */ 600 601 s->init_num=0; 602 s->renegotiate=0; 603 s->new_session=0; 604 605 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT); 606 if (s->hit) s->ctx->stats.sess_hit++; 607 608 ret=1; 609 /* s->server=0; */ 610 s->handshake_func=ssl3_connect; 611 s->ctx->stats.sess_connect_good++; 612 613 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1); 614 615 goto end; 616 /* break; */ 617 618 default: 619 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE); 620 ret= -1; 621 goto end; 622 /* break; */ 623 } 624 625 /* did we do anything */ 626 if (!s->s3->tmp.reuse_message && !skip) 627 { 628 if (s->debug) 629 { 630 if ((ret=BIO_flush(s->wbio)) <= 0) 631 goto end; 632 } 633 634 if ((cb != NULL) && (s->state != state)) 635 { 636 new_state=s->state; 637 s->state=state; 638 cb(s,SSL_CB_CONNECT_LOOP,1); 639 s->state=new_state; 640 } 641 } 642 skip=0; 643 } 644end: 645 s->in_handshake--; 646 if (buf != NULL) 647 BUF_MEM_free(buf); 648 if (cb != NULL) 649 cb(s,SSL_CB_CONNECT_EXIT,ret); 650 return(ret); 651 } 652 653 654int ssl3_client_hello(SSL *s) 655 { 656 unsigned char *buf; 657 unsigned char *p,*d; 658 int i; 659 unsigned long Time,l; 660#ifndef OPENSSL_NO_COMP 661 int j; 662 SSL_COMP *comp; 663#endif 664 665 buf=(unsigned char *)s->init_buf->data; 666 if (s->state == SSL3_ST_CW_CLNT_HELLO_A) 667 { 668 SSL_SESSION *sess = s->session; 669 if ((sess == NULL) || 670 (sess->ssl_version != s->version) || 671#ifdef OPENSSL_NO_TLSEXT 672 !sess->session_id_length || 673#else 674 (!sess->session_id_length && !sess->tlsext_tick) || 675#endif 676 (sess->not_resumable)) 677 { 678 if (!ssl_get_new_session(s,0)) 679 goto err; 680 } 681 /* else use the pre-loaded session */ 682 683 p=s->s3->client_random; 684 Time=(unsigned long)time(NULL); /* Time */ 685 l2n(Time,p); 686 if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0) 687 goto err; 688 689 /* Do the message type and length last */ 690 d=p= &(buf[4]); 691 692 /* version indicates the negotiated version: for example from 693 * an SSLv2/v3 compatible client hello). The client_version 694 * field is the maximum version we permit and it is also 695 * used in RSA encrypted premaster secrets. Some servers can 696 * choke if we initially report a higher version then 697 * renegotiate to a lower one in the premaster secret. This 698 * didn't happen with TLS 1.0 as most servers supported it 699 * but it can with TLS 1.1 or later if the server only supports 700 * 1.0. 701 * 702 * Possible scenario with previous logic: 703 * 1. Client hello indicates TLS 1.2 704 * 2. Server hello says TLS 1.0 705 * 3. RSA encrypted premaster secret uses 1.2. 706 * 4. Handhaked proceeds using TLS 1.0. 707 * 5. Server sends hello request to renegotiate. 708 * 6. Client hello indicates TLS v1.0 as we now 709 * know that is maximum server supports. 710 * 7. Server chokes on RSA encrypted premaster secret 711 * containing version 1.0. 712 * 713 * For interoperability it should be OK to always use the 714 * maximum version we support in client hello and then rely 715 * on the checking of version to ensure the servers isn't 716 * being inconsistent: for example initially negotiating with 717 * TLS 1.0 and renegotiating with TLS 1.2. We do this by using 718 * client_version in client hello and not resetting it to 719 * the negotiated version. 720 */ 721#if 0 722 *(p++)=s->version>>8; 723 *(p++)=s->version&0xff; 724 s->client_version=s->version; 725#else 726 *(p++)=s->client_version>>8; 727 *(p++)=s->client_version&0xff; 728#endif 729 730 /* Random stuff */ 731 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE); 732 p+=SSL3_RANDOM_SIZE; 733 734 /* Session ID */ 735 if (s->new_session) 736 i=0; 737 else 738 i=s->session->session_id_length; 739 *(p++)=i; 740 if (i != 0) 741 { 742 if (i > (int)sizeof(s->session->session_id)) 743 { 744 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); 745 goto err; 746 } 747 memcpy(p,s->session->session_id,i); 748 p+=i; 749 } 750 751 /* Ciphers supported */ 752 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0); 753 if (i == 0) 754 { 755 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE); 756 goto err; 757 } 758#ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH 759 /* Some servers hang if client hello > 256 bytes 760 * as hack workaround chop number of supported ciphers 761 * to keep it well below this if we use TLS v1.2 762 */ 763 if (TLS1_get_version(s) >= TLS1_2_VERSION 764 && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH) 765 i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1; 766#endif 767 s2n(i,p); 768 p+=i; 769 770 /* COMPRESSION */ 771#ifdef OPENSSL_NO_COMP 772 *(p++)=1; 773#else 774 775 if ((s->options & SSL_OP_NO_COMPRESSION) 776 || !s->ctx->comp_methods) 777 j=0; 778 else 779 j=sk_SSL_COMP_num(s->ctx->comp_methods); 780 *(p++)=1+j; 781 for (i=0; i<j; i++) 782 { 783 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i); 784 *(p++)=comp->id; 785 } 786#endif 787 *(p++)=0; /* Add the NULL method */ 788 789#ifndef OPENSSL_NO_TLSEXT 790 /* TLS extensions*/ 791 if (ssl_prepare_clienthello_tlsext(s) <= 0) 792 { 793 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT); 794 goto err; 795 } 796 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL) 797 { 798 SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR); 799 goto err; 800 } 801#endif 802 803 l=(p-d); 804 d=buf; 805 *(d++)=SSL3_MT_CLIENT_HELLO; 806 l2n3(l,d); 807 808 s->state=SSL3_ST_CW_CLNT_HELLO_B; 809 /* number of bytes to write */ 810 s->init_num=p-buf; 811 s->init_off=0; 812 } 813 814 /* SSL3_ST_CW_CLNT_HELLO_B */ 815 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 816err: 817 return(-1); 818 } 819 820int ssl3_get_server_hello(SSL *s) 821 { 822 STACK_OF(SSL_CIPHER) *sk; 823 const SSL_CIPHER *c; 824 unsigned char *p,*d; 825 int i,al,ok; 826 unsigned int j; 827 long n; 828#ifndef OPENSSL_NO_COMP 829 SSL_COMP *comp; 830#endif 831 832 n=s->method->ssl_get_message(s, 833 SSL3_ST_CR_SRVR_HELLO_A, 834 SSL3_ST_CR_SRVR_HELLO_B, 835 -1, 836 20000, /* ?? */ 837 &ok); 838 839 if (!ok) return((int)n); 840 841 if ( SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER) 842 { 843 if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST) 844 { 845 if ( s->d1->send_cookie == 0) 846 { 847 s->s3->tmp.reuse_message = 1; 848 return 1; 849 } 850 else /* already sent a cookie */ 851 { 852 al=SSL_AD_UNEXPECTED_MESSAGE; 853 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE); 854 goto f_err; 855 } 856 } 857 } 858 859 if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO) 860 { 861 al=SSL_AD_UNEXPECTED_MESSAGE; 862 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE); 863 goto f_err; 864 } 865 866 d=p=(unsigned char *)s->init_msg; 867 868 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff))) 869 { 870 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION); 871 s->version=(s->version&0xff00)|p[1]; 872 al=SSL_AD_PROTOCOL_VERSION; 873 goto f_err; 874 } 875 p+=2; 876 877 /* load the server hello data */ 878 /* load the server random */ 879 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE); 880 p+=SSL3_RANDOM_SIZE; 881 882 /* get the session-id */ 883 j= *(p++); 884 885 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE)) 886 { 887 al=SSL_AD_ILLEGAL_PARAMETER; 888 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG); 889 goto f_err; 890 } 891 892#ifndef OPENSSL_NO_TLSEXT 893 /* check if we want to resume the session based on external pre-shared secret */ 894 if (s->version >= TLS1_VERSION && s->tls_session_secret_cb) 895 { 896 SSL_CIPHER *pref_cipher=NULL; 897 s->session->master_key_length=sizeof(s->session->master_key); 898 if (s->tls_session_secret_cb(s, s->session->master_key, 899 &s->session->master_key_length, 900 NULL, &pref_cipher, 901 s->tls_session_secret_cb_arg)) 902 { 903 s->session->cipher = pref_cipher ? 904 pref_cipher : ssl_get_cipher_by_char(s, p+j); 905 } 906 } 907#endif /* OPENSSL_NO_TLSEXT */ 908 909 if (j != 0 && j == s->session->session_id_length 910 && memcmp(p,s->session->session_id,j) == 0) 911 { 912 if(s->sid_ctx_length != s->session->sid_ctx_length 913 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length)) 914 { 915 /* actually a client application bug */ 916 al=SSL_AD_ILLEGAL_PARAMETER; 917 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); 918 goto f_err; 919 } 920 s->s3->flags |= SSL3_FLAGS_CCS_OK; 921 s->hit=1; 922 } 923 else /* a miss or crap from the other end */ 924 { 925 /* If we were trying for session-id reuse, make a new 926 * SSL_SESSION so we don't stuff up other people */ 927 s->hit=0; 928 if (s->session->session_id_length > 0) 929 { 930 if (!ssl_get_new_session(s,0)) 931 { 932 al=SSL_AD_INTERNAL_ERROR; 933 goto f_err; 934 } 935 } 936 s->session->session_id_length=j; 937 memcpy(s->session->session_id,p,j); /* j could be 0 */ 938 } 939 p+=j; 940 c=ssl_get_cipher_by_char(s,p); 941 if (c == NULL) 942 { 943 /* unknown cipher */ 944 al=SSL_AD_ILLEGAL_PARAMETER; 945 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED); 946 goto f_err; 947 } 948 /* TLS v1.2 only ciphersuites require v1.2 or later */ 949 if ((c->algorithm_ssl & SSL_TLSV1_2) && 950 (TLS1_get_version(s) < TLS1_2_VERSION)) 951 { 952 al=SSL_AD_ILLEGAL_PARAMETER; 953 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED); 954 goto f_err; 955 } 956#ifndef OPENSSL_NO_SRP 957 if (((c->algorithm_mkey & SSL_kSRP) || (c->algorithm_auth & SSL_aSRP)) && 958 !(s->srp_ctx.srp_Mask & SSL_kSRP)) 959 { 960 al=SSL_AD_ILLEGAL_PARAMETER; 961 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED); 962 goto f_err; 963 } 964#endif /* OPENSSL_NO_SRP */ 965 p+=ssl_put_cipher_by_char(s,NULL,NULL); 966 967 sk=ssl_get_ciphers_by_id(s); 968 i=sk_SSL_CIPHER_find(sk,c); 969 if (i < 0) 970 { 971 /* we did not say we would use this cipher */ 972 al=SSL_AD_ILLEGAL_PARAMETER; 973 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED); 974 goto f_err; 975 } 976 977 /* Depending on the session caching (internal/external), the cipher 978 and/or cipher_id values may not be set. Make sure that 979 cipher_id is set and use it for comparison. */ 980 if (s->session->cipher) 981 s->session->cipher_id = s->session->cipher->id; 982 if (s->hit && (s->session->cipher_id != c->id)) 983 { 984/* Workaround is now obsolete */ 985#if 0 986 if (!(s->options & 987 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG)) 988#endif 989 { 990 al=SSL_AD_ILLEGAL_PARAMETER; 991 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); 992 goto f_err; 993 } 994 } 995 s->s3->tmp.new_cipher=c; 996 /* Don't digest cached records if TLS v1.2: we may need them for 997 * client authentication. 998 */ 999 if (TLS1_get_version(s) < TLS1_2_VERSION && !ssl3_digest_cached_records(s)) 1000 { 1001 al = SSL_AD_INTERNAL_ERROR; 1002 goto f_err; 1003 } 1004 /* lets get the compression algorithm */ 1005 /* COMPRESSION */ 1006#ifdef OPENSSL_NO_COMP 1007 if (*(p++) != 0) 1008 { 1009 al=SSL_AD_ILLEGAL_PARAMETER; 1010 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); 1011 goto f_err; 1012 } 1013 /* If compression is disabled we'd better not try to resume a session 1014 * using compression. 1015 */ 1016 if (s->session->compress_meth != 0) 1017 { 1018 al=SSL_AD_INTERNAL_ERROR; 1019 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_INCONSISTENT_COMPRESSION); 1020 goto f_err; 1021 } 1022#else 1023 j= *(p++); 1024 if (s->hit && j != s->session->compress_meth) 1025 { 1026 al=SSL_AD_ILLEGAL_PARAMETER; 1027 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED); 1028 goto f_err; 1029 } 1030 if (j == 0) 1031 comp=NULL; 1032 else if (s->options & SSL_OP_NO_COMPRESSION) 1033 { 1034 al=SSL_AD_ILLEGAL_PARAMETER; 1035 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_COMPRESSION_DISABLED); 1036 goto f_err; 1037 } 1038 else 1039 comp=ssl3_comp_find(s->ctx->comp_methods,j); 1040 1041 if ((j != 0) && (comp == NULL)) 1042 { 1043 al=SSL_AD_ILLEGAL_PARAMETER; 1044 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); 1045 goto f_err; 1046 } 1047 else 1048 { 1049 s->s3->tmp.new_compression=comp; 1050 } 1051#endif 1052 1053#ifndef OPENSSL_NO_TLSEXT 1054 /* TLS extensions*/ 1055 if (s->version >= SSL3_VERSION) 1056 { 1057 if (!ssl_parse_serverhello_tlsext(s,&p,d,n, &al)) 1058 { 1059 /* 'al' set by ssl_parse_serverhello_tlsext */ 1060 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT); 1061 goto f_err; 1062 } 1063 if (ssl_check_serverhello_tlsext(s) <= 0) 1064 { 1065 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SERVERHELLO_TLSEXT); 1066 goto err; 1067 } 1068 } 1069#endif 1070 1071 if (p != (d+n)) 1072 { 1073 /* wrong packet length */ 1074 al=SSL_AD_DECODE_ERROR; 1075 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH); 1076 goto f_err; 1077 } 1078 1079 return(1); 1080f_err: 1081 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1082err: 1083 return(-1); 1084 } 1085 1086int ssl3_get_server_certificate(SSL *s) 1087 { 1088 int al,i,ok,ret= -1; 1089 unsigned long n,nc,llen,l; 1090 X509 *x=NULL; 1091 const unsigned char *q,*p; 1092 unsigned char *d; 1093 STACK_OF(X509) *sk=NULL; 1094 SESS_CERT *sc; 1095 EVP_PKEY *pkey=NULL; 1096 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */ 1097 1098 n=s->method->ssl_get_message(s, 1099 SSL3_ST_CR_CERT_A, 1100 SSL3_ST_CR_CERT_B, 1101 -1, 1102 s->max_cert_list, 1103 &ok); 1104 1105 if (!ok) return((int)n); 1106 1107 if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) || 1108 ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) && 1109 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE))) 1110 { 1111 s->s3->tmp.reuse_message=1; 1112 return(1); 1113 } 1114 1115 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE) 1116 { 1117 al=SSL_AD_UNEXPECTED_MESSAGE; 1118 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE); 1119 goto f_err; 1120 } 1121 p=d=(unsigned char *)s->init_msg; 1122 1123 if ((sk=sk_X509_new_null()) == NULL) 1124 { 1125 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE); 1126 goto err; 1127 } 1128 1129 n2l3(p,llen); 1130 if (llen+3 != n) 1131 { 1132 al=SSL_AD_DECODE_ERROR; 1133 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH); 1134 goto f_err; 1135 } 1136 for (nc=0; nc<llen; ) 1137 { 1138 n2l3(p,l); 1139 if ((l+nc+3) > llen) 1140 { 1141 al=SSL_AD_DECODE_ERROR; 1142 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); 1143 goto f_err; 1144 } 1145 1146 q=p; 1147 x=d2i_X509(NULL,&q,l); 1148 if (x == NULL) 1149 { 1150 al=SSL_AD_BAD_CERTIFICATE; 1151 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB); 1152 goto f_err; 1153 } 1154 if (q != (p+l)) 1155 { 1156 al=SSL_AD_DECODE_ERROR; 1157 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); 1158 goto f_err; 1159 } 1160 if (!sk_X509_push(sk,x)) 1161 { 1162 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE); 1163 goto err; 1164 } 1165 x=NULL; 1166 nc+=l+3; 1167 p=q; 1168 } 1169 1170 i=ssl_verify_cert_chain(s,sk); 1171 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0) 1172#ifndef OPENSSL_NO_KRB5 1173 && !((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) && 1174 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5)) 1175#endif /* OPENSSL_NO_KRB5 */ 1176 ) 1177 { 1178 al=ssl_verify_alarm_type(s->verify_result); 1179 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED); 1180 goto f_err; 1181 } 1182 ERR_clear_error(); /* but we keep s->verify_result */ 1183 1184 sc=ssl_sess_cert_new(); 1185 if (sc == NULL) goto err; 1186 1187 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert); 1188 s->session->sess_cert=sc; 1189 1190 sc->cert_chain=sk; 1191 /* Inconsistency alert: cert_chain does include the peer's 1192 * certificate, which we don't include in s3_srvr.c */ 1193 x=sk_X509_value(sk,0); 1194 sk=NULL; 1195 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/ 1196 1197 pkey=X509_get_pubkey(x); 1198 1199 /* VRS: allow null cert if auth == KRB5 */ 1200 need_cert = ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) && 1201 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5)) 1202 ? 0 : 1; 1203 1204#ifdef KSSL_DEBUG 1205 printf("pkey,x = %p, %p\n", pkey,x); 1206 printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey)); 1207 printf("cipher, alg, nc = %s, %lx, %lx, %d\n", s->s3->tmp.new_cipher->name, 1208 s->s3->tmp.new_cipher->algorithm_mkey, s->s3->tmp.new_cipher->algorithm_auth, need_cert); 1209#endif /* KSSL_DEBUG */ 1210 1211 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey))) 1212 { 1213 x=NULL; 1214 al=SSL3_AL_FATAL; 1215 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 1216 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); 1217 goto f_err; 1218 } 1219 1220 i=ssl_cert_type(x,pkey); 1221 if (need_cert && i < 0) 1222 { 1223 x=NULL; 1224 al=SSL3_AL_FATAL; 1225 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 1226 SSL_R_UNKNOWN_CERTIFICATE_TYPE); 1227 goto f_err; 1228 } 1229 1230 if (need_cert) 1231 { 1232 sc->peer_cert_type=i; 1233 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509); 1234 /* Why would the following ever happen? 1235 * We just created sc a couple of lines ago. */ 1236 if (sc->peer_pkeys[i].x509 != NULL) 1237 X509_free(sc->peer_pkeys[i].x509); 1238 sc->peer_pkeys[i].x509=x; 1239 sc->peer_key= &(sc->peer_pkeys[i]); 1240 1241 if (s->session->peer != NULL) 1242 X509_free(s->session->peer); 1243 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509); 1244 s->session->peer=x; 1245 } 1246 else 1247 { 1248 sc->peer_cert_type=i; 1249 sc->peer_key= NULL; 1250 1251 if (s->session->peer != NULL) 1252 X509_free(s->session->peer); 1253 s->session->peer=NULL; 1254 } 1255 s->session->verify_result = s->verify_result; 1256 1257 x=NULL; 1258 ret=1; 1259 1260 if (0) 1261 { 1262f_err: 1263 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1264 } 1265err: 1266 EVP_PKEY_free(pkey); 1267 X509_free(x); 1268 sk_X509_pop_free(sk,X509_free); 1269 return(ret); 1270 } 1271 1272int ssl3_get_key_exchange(SSL *s) 1273 { 1274#ifndef OPENSSL_NO_RSA 1275 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2]; 1276#endif 1277 EVP_MD_CTX md_ctx; 1278 unsigned char *param,*p; 1279 int al,j,ok; 1280 long i,param_len,n,alg_k,alg_a; 1281 EVP_PKEY *pkey=NULL; 1282 const EVP_MD *md = NULL; 1283#ifndef OPENSSL_NO_RSA 1284 RSA *rsa=NULL; 1285#endif 1286#ifndef OPENSSL_NO_DH 1287 DH *dh=NULL; 1288#endif 1289#ifndef OPENSSL_NO_ECDH 1290 EC_KEY *ecdh = NULL; 1291 BN_CTX *bn_ctx = NULL; 1292 EC_POINT *srvr_ecpoint = NULL; 1293 int curve_nid = 0; 1294 int encoded_pt_len = 0; 1295#endif 1296 1297 EVP_MD_CTX_init(&md_ctx); 1298 1299 /* use same message size as in ssl3_get_certificate_request() 1300 * as ServerKeyExchange message may be skipped */ 1301 n=s->method->ssl_get_message(s, 1302 SSL3_ST_CR_KEY_EXCH_A, 1303 SSL3_ST_CR_KEY_EXCH_B, 1304 -1, 1305 s->max_cert_list, 1306 &ok); 1307 if (!ok) return((int)n); 1308 1309 alg_k=s->s3->tmp.new_cipher->algorithm_mkey; 1310 1311 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE) 1312 { 1313 /* 1314 * Can't skip server key exchange if this is an ephemeral 1315 * ciphersuite. 1316 */ 1317 if (alg_k & (SSL_kEDH|SSL_kEECDH)) 1318 { 1319 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); 1320 al = SSL_AD_UNEXPECTED_MESSAGE; 1321 goto f_err; 1322 } 1323#ifndef OPENSSL_NO_PSK 1324 /* In plain PSK ciphersuite, ServerKeyExchange can be 1325 omitted if no identity hint is sent. Set 1326 session->sess_cert anyway to avoid problems 1327 later.*/ 1328 if (alg_k & SSL_kPSK) 1329 { 1330 s->session->sess_cert=ssl_sess_cert_new(); 1331 if (s->ctx->psk_identity_hint) 1332 OPENSSL_free(s->ctx->psk_identity_hint); 1333 s->ctx->psk_identity_hint = NULL; 1334 } 1335#endif 1336 s->s3->tmp.reuse_message=1; 1337 return(1); 1338 } 1339 1340 param=p=(unsigned char *)s->init_msg; 1341 if (s->session->sess_cert != NULL) 1342 { 1343#ifndef OPENSSL_NO_RSA 1344 if (s->session->sess_cert->peer_rsa_tmp != NULL) 1345 { 1346 RSA_free(s->session->sess_cert->peer_rsa_tmp); 1347 s->session->sess_cert->peer_rsa_tmp=NULL; 1348 } 1349#endif 1350#ifndef OPENSSL_NO_DH 1351 if (s->session->sess_cert->peer_dh_tmp) 1352 { 1353 DH_free(s->session->sess_cert->peer_dh_tmp); 1354 s->session->sess_cert->peer_dh_tmp=NULL; 1355 } 1356#endif 1357#ifndef OPENSSL_NO_ECDH 1358 if (s->session->sess_cert->peer_ecdh_tmp) 1359 { 1360 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp); 1361 s->session->sess_cert->peer_ecdh_tmp=NULL; 1362 } 1363#endif 1364 } 1365 else 1366 { 1367 s->session->sess_cert=ssl_sess_cert_new(); 1368 } 1369 1370 /* Total length of the parameters including the length prefix */ 1371 param_len=0; 1372 1373 alg_a=s->s3->tmp.new_cipher->algorithm_auth; 1374 1375 al=SSL_AD_DECODE_ERROR; 1376 1377#ifndef OPENSSL_NO_PSK 1378 if (alg_k & SSL_kPSK) 1379 { 1380 char tmp_id_hint[PSK_MAX_IDENTITY_LEN+1]; 1381 1382 param_len = 2; 1383 if (param_len > n) 1384 { 1385 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1386 SSL_R_LENGTH_TOO_SHORT); 1387 goto f_err; 1388 } 1389 n2s(p,i); 1390 1391 /* Store PSK identity hint for later use, hint is used 1392 * in ssl3_send_client_key_exchange. Assume that the 1393 * maximum length of a PSK identity hint can be as 1394 * long as the maximum length of a PSK identity. */ 1395 if (i > PSK_MAX_IDENTITY_LEN) 1396 { 1397 al=SSL_AD_HANDSHAKE_FAILURE; 1398 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1399 SSL_R_DATA_LENGTH_TOO_LONG); 1400 goto f_err; 1401 } 1402 if (i > n - param_len) 1403 { 1404 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1405 SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH); 1406 goto f_err; 1407 } 1408 param_len += i; 1409 1410 /* If received PSK identity hint contains NULL 1411 * characters, the hint is truncated from the first 1412 * NULL. p may not be ending with NULL, so create a 1413 * NULL-terminated string. */ 1414 memcpy(tmp_id_hint, p, i); 1415 memset(tmp_id_hint+i, 0, PSK_MAX_IDENTITY_LEN+1-i); 1416 if (s->ctx->psk_identity_hint != NULL) 1417 OPENSSL_free(s->ctx->psk_identity_hint); 1418 s->ctx->psk_identity_hint = BUF_strdup(tmp_id_hint); 1419 if (s->ctx->psk_identity_hint == NULL) 1420 { 1421 al=SSL_AD_HANDSHAKE_FAILURE; 1422 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); 1423 goto f_err; 1424 } 1425 1426 p+=i; 1427 n-=param_len; 1428 } 1429 else 1430#endif /* !OPENSSL_NO_PSK */ 1431#ifndef OPENSSL_NO_SRP 1432 if (alg_k & SSL_kSRP) 1433 { 1434 param_len = 2; 1435 if (param_len > n) 1436 { 1437 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1438 SSL_R_LENGTH_TOO_SHORT); 1439 goto f_err; 1440 } 1441 n2s(p,i); 1442 1443 if (i > n - param_len) 1444 { 1445 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_N_LENGTH); 1446 goto f_err; 1447 } 1448 param_len += i; 1449 1450 if (!(s->srp_ctx.N=BN_bin2bn(p,i,NULL))) 1451 { 1452 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1453 goto err; 1454 } 1455 p+=i; 1456 1457 1458 if (2 > n - param_len) 1459 { 1460 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1461 SSL_R_LENGTH_TOO_SHORT); 1462 goto f_err; 1463 } 1464 param_len += 2; 1465 1466 n2s(p,i); 1467 1468 if (i > n - param_len) 1469 { 1470 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_G_LENGTH); 1471 goto f_err; 1472 } 1473 param_len += i; 1474 1475 if (!(s->srp_ctx.g=BN_bin2bn(p,i,NULL))) 1476 { 1477 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1478 goto err; 1479 } 1480 p+=i; 1481 1482 1483 if (1 > n - param_len) 1484 { 1485 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1486 SSL_R_LENGTH_TOO_SHORT); 1487 goto f_err; 1488 } 1489 param_len += 1; 1490 1491 i = (unsigned int)(p[0]); 1492 p++; 1493 1494 if (i > n - param_len) 1495 { 1496 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_S_LENGTH); 1497 goto f_err; 1498 } 1499 param_len += i; 1500 1501 if (!(s->srp_ctx.s=BN_bin2bn(p,i,NULL))) 1502 { 1503 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1504 goto err; 1505 } 1506 p+=i; 1507 1508 if (2 > n - param_len) 1509 { 1510 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1511 SSL_R_LENGTH_TOO_SHORT); 1512 goto f_err; 1513 } 1514 param_len += 2; 1515 1516 n2s(p,i); 1517 1518 if (i > n - param_len) 1519 { 1520 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_B_LENGTH); 1521 goto f_err; 1522 } 1523 param_len += i; 1524 1525 if (!(s->srp_ctx.B=BN_bin2bn(p,i,NULL))) 1526 { 1527 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1528 goto err; 1529 } 1530 p+=i; 1531 n-=param_len; 1532 1533 if (!srp_verify_server_param(s, &al)) 1534 { 1535 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_PARAMETERS); 1536 goto f_err; 1537 } 1538 1539/* We must check if there is a certificate */ 1540#ifndef OPENSSL_NO_RSA 1541 if (alg_a & SSL_aRSA) 1542 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1543#else 1544 if (0) 1545 ; 1546#endif 1547#ifndef OPENSSL_NO_DSA 1548 else if (alg_a & SSL_aDSS) 1549 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509); 1550#endif 1551 } 1552 else 1553#endif /* !OPENSSL_NO_SRP */ 1554#ifndef OPENSSL_NO_RSA 1555 if (alg_k & SSL_kRSA) 1556 { 1557 /* Temporary RSA keys only allowed in export ciphersuites */ 1558 if (!SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)) 1559 { 1560 al=SSL_AD_UNEXPECTED_MESSAGE; 1561 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE); 1562 goto f_err; 1563 } 1564 if ((rsa=RSA_new()) == NULL) 1565 { 1566 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1567 goto err; 1568 } 1569 1570 param_len = 2; 1571 if (param_len > n) 1572 { 1573 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1574 SSL_R_LENGTH_TOO_SHORT); 1575 goto f_err; 1576 } 1577 n2s(p,i); 1578 1579 if (i > n - param_len) 1580 { 1581 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH); 1582 goto f_err; 1583 } 1584 param_len += i; 1585 1586 if (!(rsa->n=BN_bin2bn(p,i,rsa->n))) 1587 { 1588 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1589 goto err; 1590 } 1591 p+=i; 1592 1593 if (2 > n - param_len) 1594 { 1595 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1596 SSL_R_LENGTH_TOO_SHORT); 1597 goto f_err; 1598 } 1599 param_len += 2; 1600 1601 n2s(p,i); 1602 1603 if (i > n - param_len) 1604 { 1605 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH); 1606 goto f_err; 1607 } 1608 param_len += i; 1609 1610 if (!(rsa->e=BN_bin2bn(p,i,rsa->e))) 1611 { 1612 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1613 goto err; 1614 } 1615 p+=i; 1616 n-=param_len; 1617 1618 /* this should be because we are using an export cipher */ 1619 if (alg_a & SSL_aRSA) 1620 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1621 else 1622 { 1623 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1624 goto err; 1625 } 1626 s->session->sess_cert->peer_rsa_tmp=rsa; 1627 rsa=NULL; 1628 } 1629#else /* OPENSSL_NO_RSA */ 1630 if (0) 1631 ; 1632#endif 1633#ifndef OPENSSL_NO_DH 1634 else if (alg_k & SSL_kEDH) 1635 { 1636 if ((dh=DH_new()) == NULL) 1637 { 1638 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB); 1639 goto err; 1640 } 1641 1642 param_len = 2; 1643 if (param_len > n) 1644 { 1645 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1646 SSL_R_LENGTH_TOO_SHORT); 1647 goto f_err; 1648 } 1649 n2s(p,i); 1650 1651 if (i > n - param_len) 1652 { 1653 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH); 1654 goto f_err; 1655 } 1656 param_len += i; 1657 1658 if (!(dh->p=BN_bin2bn(p,i,NULL))) 1659 { 1660 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1661 goto err; 1662 } 1663 p+=i; 1664 1665 if (2 > n - param_len) 1666 { 1667 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1668 SSL_R_LENGTH_TOO_SHORT); 1669 goto f_err; 1670 } 1671 param_len += 2; 1672 1673 n2s(p,i); 1674 1675 if (i > n - param_len) 1676 { 1677 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH); 1678 goto f_err; 1679 } 1680 param_len += i; 1681 1682 if (!(dh->g=BN_bin2bn(p,i,NULL))) 1683 { 1684 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1685 goto err; 1686 } 1687 p+=i; 1688 1689 if (2 > n - param_len) 1690 { 1691 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1692 SSL_R_LENGTH_TOO_SHORT); 1693 goto f_err; 1694 } 1695 param_len += 2; 1696 1697 n2s(p,i); 1698 1699 if (i > n - param_len) 1700 { 1701 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH); 1702 goto f_err; 1703 } 1704 param_len += i; 1705 1706 if (!(dh->pub_key=BN_bin2bn(p,i,NULL))) 1707 { 1708 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1709 goto err; 1710 } 1711 p+=i; 1712 n-=param_len; 1713 1714#ifndef OPENSSL_NO_RSA 1715 if (alg_a & SSL_aRSA) 1716 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1717#else 1718 if (0) 1719 ; 1720#endif 1721#ifndef OPENSSL_NO_DSA 1722 else if (alg_a & SSL_aDSS) 1723 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509); 1724#endif 1725 /* else anonymous DH, so no certificate or pkey. */ 1726 1727 s->session->sess_cert->peer_dh_tmp=dh; 1728 dh=NULL; 1729 } 1730 else if ((alg_k & SSL_kDHr) || (alg_k & SSL_kDHd)) 1731 { 1732 al=SSL_AD_ILLEGAL_PARAMETER; 1733 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER); 1734 goto f_err; 1735 } 1736#endif /* !OPENSSL_NO_DH */ 1737 1738#ifndef OPENSSL_NO_ECDH 1739 else if (alg_k & SSL_kEECDH) 1740 { 1741 EC_GROUP *ngroup; 1742 const EC_GROUP *group; 1743 1744 if ((ecdh=EC_KEY_new()) == NULL) 1745 { 1746 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1747 goto err; 1748 } 1749 1750 /* Extract elliptic curve parameters and the 1751 * server's ephemeral ECDH public key. 1752 * Keep accumulating lengths of various components in 1753 * param_len and make sure it never exceeds n. 1754 */ 1755 1756 /* XXX: For now we only support named (not generic) curves 1757 * and the ECParameters in this case is just three bytes. We 1758 * also need one byte for the length of the encoded point 1759 */ 1760 param_len=4; 1761 if (param_len > n) 1762 { 1763 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1764 SSL_R_LENGTH_TOO_SHORT); 1765 goto f_err; 1766 } 1767 1768 if ((*p != NAMED_CURVE_TYPE) || 1769 ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0)) 1770 { 1771 al=SSL_AD_INTERNAL_ERROR; 1772 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); 1773 goto f_err; 1774 } 1775 1776 ngroup = EC_GROUP_new_by_curve_name(curve_nid); 1777 if (ngroup == NULL) 1778 { 1779 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB); 1780 goto err; 1781 } 1782 if (EC_KEY_set_group(ecdh, ngroup) == 0) 1783 { 1784 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB); 1785 goto err; 1786 } 1787 EC_GROUP_free(ngroup); 1788 1789 group = EC_KEY_get0_group(ecdh); 1790 1791 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && 1792 (EC_GROUP_get_degree(group) > 163)) 1793 { 1794 al=SSL_AD_EXPORT_RESTRICTION; 1795 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER); 1796 goto f_err; 1797 } 1798 1799 p+=3; 1800 1801 /* Next, get the encoded ECPoint */ 1802 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) || 1803 ((bn_ctx = BN_CTX_new()) == NULL)) 1804 { 1805 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1806 goto err; 1807 } 1808 1809 encoded_pt_len = *p; /* length of encoded point */ 1810 p+=1; 1811 1812 if ((encoded_pt_len > n - param_len) || 1813 (EC_POINT_oct2point(group, srvr_ecpoint, 1814 p, encoded_pt_len, bn_ctx) == 0)) 1815 { 1816 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT); 1817 goto f_err; 1818 } 1819 param_len += encoded_pt_len; 1820 1821 n-=param_len; 1822 p+=encoded_pt_len; 1823 1824 /* The ECC/TLS specification does not mention 1825 * the use of DSA to sign ECParameters in the server 1826 * key exchange message. We do support RSA and ECDSA. 1827 */ 1828 if (0) ; 1829#ifndef OPENSSL_NO_RSA 1830 else if (alg_a & SSL_aRSA) 1831 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1832#endif 1833#ifndef OPENSSL_NO_ECDSA 1834 else if (alg_a & SSL_aECDSA) 1835 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509); 1836#endif 1837 /* else anonymous ECDH, so no certificate or pkey. */ 1838 EC_KEY_set_public_key(ecdh, srvr_ecpoint); 1839 s->session->sess_cert->peer_ecdh_tmp=ecdh; 1840 ecdh=NULL; 1841 BN_CTX_free(bn_ctx); 1842 bn_ctx = NULL; 1843 EC_POINT_free(srvr_ecpoint); 1844 srvr_ecpoint = NULL; 1845 } 1846 else if (alg_k) 1847 { 1848 al=SSL_AD_UNEXPECTED_MESSAGE; 1849 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE); 1850 goto f_err; 1851 } 1852#endif /* !OPENSSL_NO_ECDH */ 1853 1854 1855 /* p points to the next byte, there are 'n' bytes left */ 1856 1857 /* if it was signed, check the signature */ 1858 if (pkey != NULL) 1859 { 1860 if (TLS1_get_version(s) >= TLS1_2_VERSION) 1861 { 1862 int sigalg; 1863 if (2 > n) 1864 { 1865 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1866 SSL_R_LENGTH_TOO_SHORT); 1867 goto f_err; 1868 } 1869 1870 sigalg = tls12_get_sigid(pkey); 1871 /* Should never happen */ 1872 if (sigalg == -1) 1873 { 1874 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1875 goto err; 1876 } 1877 /* Check key type is consistent with signature */ 1878 if (sigalg != (int)p[1]) 1879 { 1880 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_TYPE); 1881 al=SSL_AD_DECODE_ERROR; 1882 goto f_err; 1883 } 1884 md = tls12_get_hash(p[0]); 1885 if (md == NULL) 1886 { 1887 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNKNOWN_DIGEST); 1888 goto f_err; 1889 } 1890#ifdef SSL_DEBUG 1891fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md)); 1892#endif 1893 p += 2; 1894 n -= 2; 1895 } 1896 else 1897 md = EVP_sha1(); 1898 1899 if (2 > n) 1900 { 1901 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1902 SSL_R_LENGTH_TOO_SHORT); 1903 goto f_err; 1904 } 1905 n2s(p,i); 1906 n-=2; 1907 j=EVP_PKEY_size(pkey); 1908 1909 /* Check signature length. If n is 0 then signature is empty */ 1910 if ((i != n) || (n > j) || (n <= 0)) 1911 { 1912 /* wrong packet length */ 1913 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH); 1914 goto f_err; 1915 } 1916 1917#ifndef OPENSSL_NO_RSA 1918 if (pkey->type == EVP_PKEY_RSA && TLS1_get_version(s) < TLS1_2_VERSION) 1919 { 1920 int num; 1921 1922 j=0; 1923 q=md_buf; 1924 for (num=2; num > 0; num--) 1925 { 1926 EVP_MD_CTX_set_flags(&md_ctx, 1927 EVP_MD_CTX_FLAG_NON_FIPS_ALLOW); 1928 EVP_DigestInit_ex(&md_ctx,(num == 2) 1929 ?s->ctx->md5:s->ctx->sha1, NULL); 1930 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); 1931 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); 1932 EVP_DigestUpdate(&md_ctx,param,param_len); 1933 EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i); 1934 q+=i; 1935 j+=i; 1936 } 1937 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n, 1938 pkey->pkey.rsa); 1939 if (i < 0) 1940 { 1941 al=SSL_AD_DECRYPT_ERROR; 1942 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT); 1943 goto f_err; 1944 } 1945 if (i == 0) 1946 { 1947 /* bad signature */ 1948 al=SSL_AD_DECRYPT_ERROR; 1949 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE); 1950 goto f_err; 1951 } 1952 } 1953 else 1954#endif 1955 { 1956 EVP_VerifyInit_ex(&md_ctx, md, NULL); 1957 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); 1958 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); 1959 EVP_VerifyUpdate(&md_ctx,param,param_len); 1960 if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0) 1961 { 1962 /* bad signature */ 1963 al=SSL_AD_DECRYPT_ERROR; 1964 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE); 1965 goto f_err; 1966 } 1967 } 1968 } 1969 else 1970 { 1971 if (!(alg_a & SSL_aNULL) && !(alg_k & SSL_kPSK)) 1972 /* aNULL or kPSK do not need public keys */ 1973 { 1974 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1975 goto err; 1976 } 1977 /* still data left over */ 1978 if (n != 0) 1979 { 1980 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE); 1981 goto f_err; 1982 } 1983 } 1984 EVP_PKEY_free(pkey); 1985 EVP_MD_CTX_cleanup(&md_ctx); 1986 return(1); 1987f_err: 1988 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1989err: 1990 EVP_PKEY_free(pkey); 1991#ifndef OPENSSL_NO_RSA 1992 if (rsa != NULL) 1993 RSA_free(rsa); 1994#endif 1995#ifndef OPENSSL_NO_DH 1996 if (dh != NULL) 1997 DH_free(dh); 1998#endif 1999#ifndef OPENSSL_NO_ECDH 2000 BN_CTX_free(bn_ctx); 2001 EC_POINT_free(srvr_ecpoint); 2002 if (ecdh != NULL) 2003 EC_KEY_free(ecdh); 2004#endif 2005 EVP_MD_CTX_cleanup(&md_ctx); 2006 return(-1); 2007 } 2008 2009int ssl3_get_certificate_request(SSL *s) 2010 { 2011 int ok,ret=0; 2012 unsigned long n,nc,l; 2013 unsigned int llen, ctype_num,i; 2014 X509_NAME *xn=NULL; 2015 const unsigned char *p,*q; 2016 unsigned char *d; 2017 STACK_OF(X509_NAME) *ca_sk=NULL; 2018 2019 n=s->method->ssl_get_message(s, 2020 SSL3_ST_CR_CERT_REQ_A, 2021 SSL3_ST_CR_CERT_REQ_B, 2022 -1, 2023 s->max_cert_list, 2024 &ok); 2025 2026 if (!ok) return((int)n); 2027 2028 s->s3->tmp.cert_req=0; 2029 2030 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE) 2031 { 2032 s->s3->tmp.reuse_message=1; 2033 /* If we get here we don't need any cached handshake records 2034 * as we wont be doing client auth. 2035 */ 2036 if (s->s3->handshake_buffer) 2037 { 2038 if (!ssl3_digest_cached_records(s)) 2039 goto err; 2040 } 2041 return(1); 2042 } 2043 2044 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST) 2045 { 2046 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 2047 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE); 2048 goto err; 2049 } 2050 2051 /* TLS does not like anon-DH with client cert */ 2052 if (s->version > SSL3_VERSION) 2053 { 2054 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) 2055 { 2056 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 2057 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER); 2058 goto err; 2059 } 2060 } 2061 2062 p=d=(unsigned char *)s->init_msg; 2063 2064 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL) 2065 { 2066 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE); 2067 goto err; 2068 } 2069 2070 /* get the certificate types */ 2071 ctype_num= *(p++); 2072 if (ctype_num > SSL3_CT_NUMBER) 2073 ctype_num=SSL3_CT_NUMBER; 2074 for (i=0; i<ctype_num; i++) 2075 s->s3->tmp.ctype[i]= p[i]; 2076 p+=ctype_num; 2077 if (TLS1_get_version(s) >= TLS1_2_VERSION) 2078 { 2079 n2s(p, llen); 2080 /* Check we have enough room for signature algorithms and 2081 * following length value. 2082 */ 2083 if ((unsigned long)(p - d + llen + 2) > n) 2084 { 2085 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 2086 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_DATA_LENGTH_TOO_LONG); 2087 goto err; 2088 } 2089 if ((llen & 1) || !tls1_process_sigalgs(s, p, llen)) 2090 { 2091 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 2092 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_SIGNATURE_ALGORITHMS_ERROR); 2093 goto err; 2094 } 2095 p += llen; 2096 } 2097 2098 /* get the CA RDNs */ 2099 n2s(p,llen); 2100#if 0 2101{ 2102FILE *out; 2103out=fopen("/tmp/vsign.der","w"); 2104fwrite(p,1,llen,out); 2105fclose(out); 2106} 2107#endif 2108 2109 if ((unsigned long)(p - d + llen) != n) 2110 { 2111 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 2112 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH); 2113 goto err; 2114 } 2115 2116 for (nc=0; nc<llen; ) 2117 { 2118 n2s(p,l); 2119 if ((l+nc+2) > llen) 2120 { 2121 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG)) 2122 goto cont; /* netscape bugs */ 2123 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 2124 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG); 2125 goto err; 2126 } 2127 2128 q=p; 2129 2130 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL) 2131 { 2132 /* If netscape tolerance is on, ignore errors */ 2133 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG) 2134 goto cont; 2135 else 2136 { 2137 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 2138 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB); 2139 goto err; 2140 } 2141 } 2142 2143 if (q != (p+l)) 2144 { 2145 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 2146 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH); 2147 goto err; 2148 } 2149 if (!sk_X509_NAME_push(ca_sk,xn)) 2150 { 2151 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE); 2152 goto err; 2153 } 2154 2155 p+=l; 2156 nc+=l+2; 2157 } 2158 2159 if (0) 2160 { 2161cont: 2162 ERR_clear_error(); 2163 } 2164 2165 /* we should setup a certificate to return.... */ 2166 s->s3->tmp.cert_req=1; 2167 s->s3->tmp.ctype_num=ctype_num; 2168 if (s->s3->tmp.ca_names != NULL) 2169 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free); 2170 s->s3->tmp.ca_names=ca_sk; 2171 ca_sk=NULL; 2172 2173 ret=1; 2174err: 2175 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free); 2176 return(ret); 2177 } 2178 2179static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b) 2180 { 2181 return(X509_NAME_cmp(*a,*b)); 2182 } 2183#ifndef OPENSSL_NO_TLSEXT 2184int ssl3_get_new_session_ticket(SSL *s) 2185 { 2186 int ok,al,ret=0, ticklen; 2187 long n; 2188 const unsigned char *p; 2189 unsigned char *d; 2190 2191 n=s->method->ssl_get_message(s, 2192 SSL3_ST_CR_SESSION_TICKET_A, 2193 SSL3_ST_CR_SESSION_TICKET_B, 2194 -1, 2195 16384, 2196 &ok); 2197 2198 if (!ok) 2199 return((int)n); 2200 2201 if (s->s3->tmp.message_type == SSL3_MT_FINISHED) 2202 { 2203 s->s3->tmp.reuse_message=1; 2204 return(1); 2205 } 2206 if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET) 2207 { 2208 al=SSL_AD_UNEXPECTED_MESSAGE; 2209 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_BAD_MESSAGE_TYPE); 2210 goto f_err; 2211 } 2212 if (n < 6) 2213 { 2214 /* need at least ticket_lifetime_hint + ticket length */ 2215 al = SSL_AD_DECODE_ERROR; 2216 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH); 2217 goto f_err; 2218 } 2219 2220 p=d=(unsigned char *)s->init_msg; 2221 n2l(p, s->session->tlsext_tick_lifetime_hint); 2222 n2s(p, ticklen); 2223 /* ticket_lifetime_hint + ticket_length + ticket */ 2224 if (ticklen + 6 != n) 2225 { 2226 al = SSL_AD_DECODE_ERROR; 2227 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH); 2228 goto f_err; 2229 } 2230 if (s->session->tlsext_tick) 2231 { 2232 OPENSSL_free(s->session->tlsext_tick); 2233 s->session->tlsext_ticklen = 0; 2234 } 2235 s->session->tlsext_tick = OPENSSL_malloc(ticklen); 2236 if (!s->session->tlsext_tick) 2237 { 2238 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE); 2239 goto err; 2240 } 2241 memcpy(s->session->tlsext_tick, p, ticklen); 2242 s->session->tlsext_ticklen = ticklen; 2243 /* There are two ways to detect a resumed ticket sesion. 2244 * One is to set an appropriate session ID and then the server 2245 * must return a match in ServerHello. This allows the normal 2246 * client session ID matching to work and we know much 2247 * earlier that the ticket has been accepted. 2248 * 2249 * The other way is to set zero length session ID when the 2250 * ticket is presented and rely on the handshake to determine 2251 * session resumption. 2252 * 2253 * We choose the former approach because this fits in with 2254 * assumptions elsewhere in OpenSSL. The session ID is set 2255 * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the 2256 * ticket. 2257 */ 2258 EVP_Digest(p, ticklen, 2259 s->session->session_id, &s->session->session_id_length, 2260#ifndef OPENSSL_NO_SHA256 2261 EVP_sha256(), NULL); 2262#else 2263 EVP_sha1(), NULL); 2264#endif 2265 ret=1; 2266 return(ret); 2267f_err: 2268 ssl3_send_alert(s,SSL3_AL_FATAL,al); 2269err: 2270 return(-1); 2271 } 2272 2273int ssl3_get_cert_status(SSL *s) 2274 { 2275 int ok, al; 2276 unsigned long resplen,n; 2277 const unsigned char *p; 2278 2279 n=s->method->ssl_get_message(s, 2280 SSL3_ST_CR_CERT_STATUS_A, 2281 SSL3_ST_CR_CERT_STATUS_B, 2282 SSL3_MT_CERTIFICATE_STATUS, 2283 16384, 2284 &ok); 2285 2286 if (!ok) return((int)n); 2287 if (n < 4) 2288 { 2289 /* need at least status type + length */ 2290 al = SSL_AD_DECODE_ERROR; 2291 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH); 2292 goto f_err; 2293 } 2294 p = (unsigned char *)s->init_msg; 2295 if (*p++ != TLSEXT_STATUSTYPE_ocsp) 2296 { 2297 al = SSL_AD_DECODE_ERROR; 2298 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_UNSUPPORTED_STATUS_TYPE); 2299 goto f_err; 2300 } 2301 n2l3(p, resplen); 2302 if (resplen + 4 != n) 2303 { 2304 al = SSL_AD_DECODE_ERROR; 2305 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH); 2306 goto f_err; 2307 } 2308 if (s->tlsext_ocsp_resp) 2309 OPENSSL_free(s->tlsext_ocsp_resp); 2310 s->tlsext_ocsp_resp = BUF_memdup(p, resplen); 2311 if (!s->tlsext_ocsp_resp) 2312 { 2313 al = SSL_AD_INTERNAL_ERROR; 2314 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE); 2315 goto f_err; 2316 } 2317 s->tlsext_ocsp_resplen = resplen; 2318 if (s->ctx->tlsext_status_cb) 2319 { 2320 int ret; 2321 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg); 2322 if (ret == 0) 2323 { 2324 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE; 2325 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_INVALID_STATUS_RESPONSE); 2326 goto f_err; 2327 } 2328 if (ret < 0) 2329 { 2330 al = SSL_AD_INTERNAL_ERROR; 2331 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE); 2332 goto f_err; 2333 } 2334 } 2335 return 1; 2336f_err: 2337 ssl3_send_alert(s,SSL3_AL_FATAL,al); 2338 return(-1); 2339 } 2340#endif 2341 2342int ssl3_get_server_done(SSL *s) 2343 { 2344 int ok,ret=0; 2345 long n; 2346 2347 n=s->method->ssl_get_message(s, 2348 SSL3_ST_CR_SRVR_DONE_A, 2349 SSL3_ST_CR_SRVR_DONE_B, 2350 SSL3_MT_SERVER_DONE, 2351 30, /* should be very small, like 0 :-) */ 2352 &ok); 2353 2354 if (!ok) return((int)n); 2355 if (n > 0) 2356 { 2357 /* should contain no data */ 2358 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 2359 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH); 2360 return -1; 2361 } 2362 ret=1; 2363 return(ret); 2364 } 2365 2366 2367int ssl3_send_client_key_exchange(SSL *s) 2368 { 2369 unsigned char *p,*d; 2370 int n; 2371 unsigned long alg_k; 2372#ifndef OPENSSL_NO_RSA 2373 unsigned char *q; 2374 EVP_PKEY *pkey=NULL; 2375#endif 2376#ifndef OPENSSL_NO_KRB5 2377 KSSL_ERR kssl_err; 2378#endif /* OPENSSL_NO_KRB5 */ 2379#ifndef OPENSSL_NO_ECDH 2380 EC_KEY *clnt_ecdh = NULL; 2381 const EC_POINT *srvr_ecpoint = NULL; 2382 EVP_PKEY *srvr_pub_pkey = NULL; 2383 unsigned char *encodedPoint = NULL; 2384 int encoded_pt_len = 0; 2385 BN_CTX * bn_ctx = NULL; 2386#endif 2387 2388 if (s->state == SSL3_ST_CW_KEY_EXCH_A) 2389 { 2390 d=(unsigned char *)s->init_buf->data; 2391 p= &(d[4]); 2392 2393 alg_k=s->s3->tmp.new_cipher->algorithm_mkey; 2394 2395 /* Fool emacs indentation */ 2396 if (0) {} 2397#ifndef OPENSSL_NO_RSA 2398 else if (alg_k & SSL_kRSA) 2399 { 2400 RSA *rsa; 2401 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; 2402 2403 if (s->session->sess_cert == NULL) 2404 { 2405 /* We should always have a server certificate with SSL_kRSA. */ 2406 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 2407 goto err; 2408 } 2409 2410 if (s->session->sess_cert->peer_rsa_tmp != NULL) 2411 rsa=s->session->sess_cert->peer_rsa_tmp; 2412 else 2413 { 2414 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 2415 if ((pkey == NULL) || 2416 (pkey->type != EVP_PKEY_RSA) || 2417 (pkey->pkey.rsa == NULL)) 2418 { 2419 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 2420 goto err; 2421 } 2422 rsa=pkey->pkey.rsa; 2423 EVP_PKEY_free(pkey); 2424 } 2425 2426 tmp_buf[0]=s->client_version>>8; 2427 tmp_buf[1]=s->client_version&0xff; 2428 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0) 2429 goto err; 2430 2431 s->session->master_key_length=sizeof tmp_buf; 2432 2433 q=p; 2434 /* Fix buf for TLS and beyond */ 2435 if (s->version > SSL3_VERSION) 2436 p+=2; 2437 n=RSA_public_encrypt(sizeof tmp_buf, 2438 tmp_buf,p,rsa,RSA_PKCS1_PADDING); 2439#ifdef PKCS1_CHECK 2440 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++; 2441 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70; 2442#endif 2443 if (n <= 0) 2444 { 2445 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT); 2446 goto err; 2447 } 2448 2449 /* Fix buf for TLS and beyond */ 2450 if (s->version > SSL3_VERSION) 2451 { 2452 s2n(n,q); 2453 n+=2; 2454 } 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 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf); 2461 } 2462#endif 2463#ifndef OPENSSL_NO_KRB5 2464 else if (alg_k & SSL_kKRB5) 2465 { 2466 krb5_error_code krb5rc; 2467 KSSL_CTX *kssl_ctx = s->kssl_ctx; 2468 /* krb5_data krb5_ap_req; */ 2469 krb5_data *enc_ticket; 2470 krb5_data authenticator, *authp = NULL; 2471 EVP_CIPHER_CTX ciph_ctx; 2472 const EVP_CIPHER *enc = NULL; 2473 unsigned char iv[EVP_MAX_IV_LENGTH]; 2474 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; 2475 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH 2476 + EVP_MAX_IV_LENGTH]; 2477 int padl, outl = sizeof(epms); 2478 2479 EVP_CIPHER_CTX_init(&ciph_ctx); 2480 2481#ifdef KSSL_DEBUG 2482 printf("ssl3_send_client_key_exchange(%lx & %lx)\n", 2483 alg_k, SSL_kKRB5); 2484#endif /* KSSL_DEBUG */ 2485 2486 authp = NULL; 2487#ifdef KRB5SENDAUTH 2488 if (KRB5SENDAUTH) authp = &authenticator; 2489#endif /* KRB5SENDAUTH */ 2490 2491 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp, 2492 &kssl_err); 2493 enc = kssl_map_enc(kssl_ctx->enctype); 2494 if (enc == NULL) 2495 goto err; 2496#ifdef KSSL_DEBUG 2497 { 2498 printf("kssl_cget_tkt rtn %d\n", krb5rc); 2499 if (krb5rc && kssl_err.text) 2500 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text); 2501 } 2502#endif /* KSSL_DEBUG */ 2503 2504 if (krb5rc) 2505 { 2506 ssl3_send_alert(s,SSL3_AL_FATAL, 2507 SSL_AD_HANDSHAKE_FAILURE); 2508 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2509 kssl_err.reason); 2510 goto err; 2511 } 2512 2513 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ 2514 ** in place of RFC 2712 KerberosWrapper, as in: 2515 ** 2516 ** Send ticket (copy to *p, set n = length) 2517 ** n = krb5_ap_req.length; 2518 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length); 2519 ** if (krb5_ap_req.data) 2520 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req); 2521 ** 2522 ** Now using real RFC 2712 KerberosWrapper 2523 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>) 2524 ** Note: 2712 "opaque" types are here replaced 2525 ** with a 2-byte length followed by the value. 2526 ** Example: 2527 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms 2528 ** Where "xx xx" = length bytes. Shown here with 2529 ** optional authenticator omitted. 2530 */ 2531 2532 /* KerberosWrapper.Ticket */ 2533 s2n(enc_ticket->length,p); 2534 memcpy(p, enc_ticket->data, enc_ticket->length); 2535 p+= enc_ticket->length; 2536 n = enc_ticket->length + 2; 2537 2538 /* KerberosWrapper.Authenticator */ 2539 if (authp && authp->length) 2540 { 2541 s2n(authp->length,p); 2542 memcpy(p, authp->data, authp->length); 2543 p+= authp->length; 2544 n+= authp->length + 2; 2545 2546 free(authp->data); 2547 authp->data = NULL; 2548 authp->length = 0; 2549 } 2550 else 2551 { 2552 s2n(0,p);/* null authenticator length */ 2553 n+=2; 2554 } 2555 2556 tmp_buf[0]=s->client_version>>8; 2557 tmp_buf[1]=s->client_version&0xff; 2558 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0) 2559 goto err; 2560 2561 /* 20010420 VRS. Tried it this way; failed. 2562 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL); 2563 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx, 2564 ** kssl_ctx->length); 2565 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv); 2566 */ 2567 2568 memset(iv, 0, sizeof iv); /* per RFC 1510 */ 2569 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL, 2570 kssl_ctx->key,iv); 2571 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf, 2572 sizeof tmp_buf); 2573 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl); 2574 outl += padl; 2575 if (outl > (int)sizeof epms) 2576 { 2577 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); 2578 goto err; 2579 } 2580 EVP_CIPHER_CTX_cleanup(&ciph_ctx); 2581 2582 /* KerberosWrapper.EncryptedPreMasterSecret */ 2583 s2n(outl,p); 2584 memcpy(p, epms, outl); 2585 p+=outl; 2586 n+=outl + 2; 2587 2588 s->session->master_key_length= 2589 s->method->ssl3_enc->generate_master_secret(s, 2590 s->session->master_key, 2591 tmp_buf, sizeof tmp_buf); 2592 2593 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf); 2594 OPENSSL_cleanse(epms, outl); 2595 } 2596#endif 2597#ifndef OPENSSL_NO_DH 2598 else if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) 2599 { 2600 DH *dh_srvr,*dh_clnt; 2601 2602 if (s->session->sess_cert == NULL) 2603 { 2604 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 2605 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE); 2606 goto err; 2607 } 2608 2609 if (s->session->sess_cert->peer_dh_tmp != NULL) 2610 dh_srvr=s->session->sess_cert->peer_dh_tmp; 2611 else 2612 { 2613 /* we get them from the cert */ 2614 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); 2615 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS); 2616 goto err; 2617 } 2618 2619 /* generate a new random key */ 2620 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL) 2621 { 2622 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 2623 goto err; 2624 } 2625 if (!DH_generate_key(dh_clnt)) 2626 { 2627 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 2628 DH_free(dh_clnt); 2629 goto err; 2630 } 2631 2632 /* use the 'p' output buffer for the DH key, but 2633 * make sure to clear it out afterwards */ 2634 2635 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt); 2636 2637 if (n <= 0) 2638 { 2639 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 2640 DH_free(dh_clnt); 2641 goto err; 2642 } 2643 2644 /* generate master key from the result */ 2645 s->session->master_key_length= 2646 s->method->ssl3_enc->generate_master_secret(s, 2647 s->session->master_key,p,n); 2648 /* clean up */ 2649 memset(p,0,n); 2650 2651 /* send off the data */ 2652 n=BN_num_bytes(dh_clnt->pub_key); 2653 s2n(n,p); 2654 BN_bn2bin(dh_clnt->pub_key,p); 2655 n+=2; 2656 2657 DH_free(dh_clnt); 2658 2659 /* perhaps clean things up a bit EAY EAY EAY EAY*/ 2660 } 2661#endif 2662 2663#ifndef OPENSSL_NO_ECDH 2664 else if (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)) 2665 { 2666 const EC_GROUP *srvr_group = NULL; 2667 EC_KEY *tkey; 2668 int ecdh_clnt_cert = 0; 2669 int field_size = 0; 2670 2671 if (s->session->sess_cert == NULL) 2672 { 2673 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 2674 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE); 2675 goto err; 2676 } 2677 2678 /* Did we send out the client's 2679 * ECDH share for use in premaster 2680 * computation as part of client certificate? 2681 * If so, set ecdh_clnt_cert to 1. 2682 */ 2683 if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL)) 2684 { 2685 /* XXX: For now, we do not support client 2686 * authentication using ECDH certificates. 2687 * To add such support, one needs to add 2688 * code that checks for appropriate 2689 * conditions and sets ecdh_clnt_cert to 1. 2690 * For example, the cert have an ECC 2691 * key on the same curve as the server's 2692 * and the key should be authorized for 2693 * key agreement. 2694 * 2695 * One also needs to add code in ssl3_connect 2696 * to skip sending the certificate verify 2697 * message. 2698 * 2699 * if ((s->cert->key->privatekey != NULL) && 2700 * (s->cert->key->privatekey->type == 2701 * EVP_PKEY_EC) && ...) 2702 * ecdh_clnt_cert = 1; 2703 */ 2704 } 2705 2706 if (s->session->sess_cert->peer_ecdh_tmp != NULL) 2707 { 2708 tkey = s->session->sess_cert->peer_ecdh_tmp; 2709 } 2710 else 2711 { 2712 /* Get the Server Public Key from Cert */ 2713 srvr_pub_pkey = X509_get_pubkey(s->session-> \ 2714 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509); 2715 if ((srvr_pub_pkey == NULL) || 2716 (srvr_pub_pkey->type != EVP_PKEY_EC) || 2717 (srvr_pub_pkey->pkey.ec == NULL)) 2718 { 2719 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2720 ERR_R_INTERNAL_ERROR); 2721 goto err; 2722 } 2723 2724 tkey = srvr_pub_pkey->pkey.ec; 2725 } 2726 2727 srvr_group = EC_KEY_get0_group(tkey); 2728 srvr_ecpoint = EC_KEY_get0_public_key(tkey); 2729 2730 if ((srvr_group == NULL) || (srvr_ecpoint == NULL)) 2731 { 2732 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2733 ERR_R_INTERNAL_ERROR); 2734 goto err; 2735 } 2736 2737 if ((clnt_ecdh=EC_KEY_new()) == NULL) 2738 { 2739 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2740 goto err; 2741 } 2742 2743 if (!EC_KEY_set_group(clnt_ecdh, srvr_group)) 2744 { 2745 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB); 2746 goto err; 2747 } 2748 if (ecdh_clnt_cert) 2749 { 2750 /* Reuse key info from our certificate 2751 * We only need our private key to perform 2752 * the ECDH computation. 2753 */ 2754 const BIGNUM *priv_key; 2755 tkey = s->cert->key->privatekey->pkey.ec; 2756 priv_key = EC_KEY_get0_private_key(tkey); 2757 if (priv_key == NULL) 2758 { 2759 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2760 goto err; 2761 } 2762 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key)) 2763 { 2764 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB); 2765 goto err; 2766 } 2767 } 2768 else 2769 { 2770 /* Generate a new ECDH key pair */ 2771 if (!(EC_KEY_generate_key(clnt_ecdh))) 2772 { 2773 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB); 2774 goto err; 2775 } 2776 } 2777 2778 /* use the 'p' output buffer for the ECDH key, but 2779 * make sure to clear it out afterwards 2780 */ 2781 2782 field_size = EC_GROUP_get_degree(srvr_group); 2783 if (field_size <= 0) 2784 { 2785 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2786 ERR_R_ECDH_LIB); 2787 goto err; 2788 } 2789 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL); 2790 if (n <= 0) 2791 { 2792 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2793 ERR_R_ECDH_LIB); 2794 goto err; 2795 } 2796 2797 /* generate master key from the result */ 2798 s->session->master_key_length = s->method->ssl3_enc \ 2799 -> generate_master_secret(s, 2800 s->session->master_key, 2801 p, n); 2802 2803 memset(p, 0, n); /* clean up */ 2804 2805 if (ecdh_clnt_cert) 2806 { 2807 /* Send empty client key exch message */ 2808 n = 0; 2809 } 2810 else 2811 { 2812 /* First check the size of encoding and 2813 * allocate memory accordingly. 2814 */ 2815 encoded_pt_len = 2816 EC_POINT_point2oct(srvr_group, 2817 EC_KEY_get0_public_key(clnt_ecdh), 2818 POINT_CONVERSION_UNCOMPRESSED, 2819 NULL, 0, NULL); 2820 2821 encodedPoint = (unsigned char *) 2822 OPENSSL_malloc(encoded_pt_len * 2823 sizeof(unsigned char)); 2824 bn_ctx = BN_CTX_new(); 2825 if ((encodedPoint == NULL) || 2826 (bn_ctx == NULL)) 2827 { 2828 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2829 goto err; 2830 } 2831 2832 /* Encode the public key */ 2833 n = EC_POINT_point2oct(srvr_group, 2834 EC_KEY_get0_public_key(clnt_ecdh), 2835 POINT_CONVERSION_UNCOMPRESSED, 2836 encodedPoint, encoded_pt_len, bn_ctx); 2837 2838 *p = n; /* length of encoded point */ 2839 /* Encoded point will be copied here */ 2840 p += 1; 2841 /* copy the point */ 2842 memcpy((unsigned char *)p, encodedPoint, n); 2843 /* increment n to account for length field */ 2844 n += 1; 2845 } 2846 2847 /* Free allocated memory */ 2848 BN_CTX_free(bn_ctx); 2849 if (encodedPoint != NULL) OPENSSL_free(encodedPoint); 2850 if (clnt_ecdh != NULL) 2851 EC_KEY_free(clnt_ecdh); 2852 EVP_PKEY_free(srvr_pub_pkey); 2853 } 2854#endif /* !OPENSSL_NO_ECDH */ 2855 else if (alg_k & SSL_kGOST) 2856 { 2857 /* GOST key exchange message creation */ 2858 EVP_PKEY_CTX *pkey_ctx; 2859 X509 *peer_cert; 2860 size_t msglen; 2861 unsigned int md_len; 2862 int keytype; 2863 unsigned char premaster_secret[32],shared_ukm[32], tmp[256]; 2864 EVP_MD_CTX *ukm_hash; 2865 EVP_PKEY *pub_key; 2866 2867 /* Get server sertificate PKEY and create ctx from it */ 2868 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST01)].x509; 2869 if (!peer_cert) 2870 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST94)].x509; 2871 if (!peer_cert) { 2872 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER); 2873 goto err; 2874 } 2875 2876 pkey_ctx=EVP_PKEY_CTX_new(pub_key=X509_get_pubkey(peer_cert),NULL); 2877 /* If we have send a certificate, and certificate key 2878 2879 * parameters match those of server certificate, use 2880 * certificate key for key exchange 2881 */ 2882 2883 /* Otherwise, generate ephemeral key pair */ 2884 2885 EVP_PKEY_encrypt_init(pkey_ctx); 2886 /* Generate session key */ 2887 RAND_bytes(premaster_secret,32); 2888 /* If we have client certificate, use its secret as peer key */ 2889 if (s->s3->tmp.cert_req && s->cert->key->privatekey) { 2890 if (EVP_PKEY_derive_set_peer(pkey_ctx,s->cert->key->privatekey) <=0) { 2891 /* If there was an error - just ignore it. Ephemeral key 2892 * would be used 2893 */ 2894 ERR_clear_error(); 2895 } 2896 } 2897 /* Compute shared IV and store it in algorithm-specific 2898 * context data */ 2899 ukm_hash = EVP_MD_CTX_create(); 2900 EVP_DigestInit(ukm_hash,EVP_get_digestbynid(NID_id_GostR3411_94)); 2901 EVP_DigestUpdate(ukm_hash,s->s3->client_random,SSL3_RANDOM_SIZE); 2902 EVP_DigestUpdate(ukm_hash,s->s3->server_random,SSL3_RANDOM_SIZE); 2903 EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len); 2904 EVP_MD_CTX_destroy(ukm_hash); 2905 if (EVP_PKEY_CTX_ctrl(pkey_ctx,-1,EVP_PKEY_OP_ENCRYPT,EVP_PKEY_CTRL_SET_IV, 2906 8,shared_ukm)<0) { 2907 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2908 SSL_R_LIBRARY_BUG); 2909 goto err; 2910 } 2911 /* Make GOST keytransport blob message */ 2912 /*Encapsulate it into sequence */ 2913 *(p++)=V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED; 2914 msglen=255; 2915 if (EVP_PKEY_encrypt(pkey_ctx,tmp,&msglen,premaster_secret,32)<0) { 2916 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2917 SSL_R_LIBRARY_BUG); 2918 goto err; 2919 } 2920 if (msglen >= 0x80) 2921 { 2922 *(p++)=0x81; 2923 *(p++)= msglen & 0xff; 2924 n=msglen+3; 2925 } 2926 else 2927 { 2928 *(p++)= msglen & 0xff; 2929 n=msglen+2; 2930 } 2931 memcpy(p, tmp, msglen); 2932 /* Check if pubkey from client certificate was used */ 2933 if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0) 2934 { 2935 /* Set flag "skip certificate verify" */ 2936 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY; 2937 } 2938 EVP_PKEY_CTX_free(pkey_ctx); 2939 s->session->master_key_length= 2940 s->method->ssl3_enc->generate_master_secret(s, 2941 s->session->master_key,premaster_secret,32); 2942 EVP_PKEY_free(pub_key); 2943 2944 } 2945#ifndef OPENSSL_NO_SRP 2946 else if (alg_k & SSL_kSRP) 2947 { 2948 if (s->srp_ctx.A != NULL) 2949 { 2950 /* send off the data */ 2951 n=BN_num_bytes(s->srp_ctx.A); 2952 s2n(n,p); 2953 BN_bn2bin(s->srp_ctx.A,p); 2954 n+=2; 2955 } 2956 else 2957 { 2958 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 2959 goto err; 2960 } 2961 if (s->session->srp_username != NULL) 2962 OPENSSL_free(s->session->srp_username); 2963 s->session->srp_username = BUF_strdup(s->srp_ctx.login); 2964 if (s->session->srp_username == NULL) 2965 { 2966 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2967 ERR_R_MALLOC_FAILURE); 2968 goto err; 2969 } 2970 2971 if ((s->session->master_key_length = SRP_generate_client_master_secret(s,s->session->master_key))<0) 2972 { 2973 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 2974 goto err; 2975 } 2976 } 2977#endif 2978#ifndef OPENSSL_NO_PSK 2979 else if (alg_k & SSL_kPSK) 2980 { 2981 char identity[PSK_MAX_IDENTITY_LEN]; 2982 unsigned char *t = NULL; 2983 unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4]; 2984 unsigned int pre_ms_len = 0, psk_len = 0; 2985 int psk_err = 1; 2986 2987 n = 0; 2988 if (s->psk_client_callback == NULL) 2989 { 2990 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2991 SSL_R_PSK_NO_CLIENT_CB); 2992 goto err; 2993 } 2994 2995 psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint, 2996 identity, PSK_MAX_IDENTITY_LEN, 2997 psk_or_pre_ms, sizeof(psk_or_pre_ms)); 2998 if (psk_len > PSK_MAX_PSK_LEN) 2999 { 3000 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 3001 ERR_R_INTERNAL_ERROR); 3002 goto psk_err; 3003 } 3004 else if (psk_len == 0) 3005 { 3006 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 3007 SSL_R_PSK_IDENTITY_NOT_FOUND); 3008 goto psk_err; 3009 } 3010 3011 /* create PSK pre_master_secret */ 3012 pre_ms_len = 2+psk_len+2+psk_len; 3013 t = psk_or_pre_ms; 3014 memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len); 3015 s2n(psk_len, t); 3016 memset(t, 0, psk_len); 3017 t+=psk_len; 3018 s2n(psk_len, t); 3019 3020 if (s->session->psk_identity_hint != NULL) 3021 OPENSSL_free(s->session->psk_identity_hint); 3022 s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint); 3023 if (s->ctx->psk_identity_hint != NULL && 3024 s->session->psk_identity_hint == NULL) 3025 { 3026 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 3027 ERR_R_MALLOC_FAILURE); 3028 goto psk_err; 3029 } 3030 3031 if (s->session->psk_identity != NULL) 3032 OPENSSL_free(s->session->psk_identity); 3033 s->session->psk_identity = BUF_strdup(identity); 3034 if (s->session->psk_identity == NULL) 3035 { 3036 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 3037 ERR_R_MALLOC_FAILURE); 3038 goto psk_err; 3039 } 3040 3041 s->session->master_key_length = 3042 s->method->ssl3_enc->generate_master_secret(s, 3043 s->session->master_key, 3044 psk_or_pre_ms, pre_ms_len); 3045 n = strlen(identity); 3046 s2n(n, p); 3047 memcpy(p, identity, n); 3048 n+=2; 3049 psk_err = 0; 3050 psk_err: 3051 OPENSSL_cleanse(identity, PSK_MAX_IDENTITY_LEN); 3052 OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms)); 3053 if (psk_err != 0) 3054 { 3055 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); 3056 goto err; 3057 } 3058 } 3059#endif 3060 else 3061 { 3062 ssl3_send_alert(s, SSL3_AL_FATAL, 3063 SSL_AD_HANDSHAKE_FAILURE); 3064 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 3065 ERR_R_INTERNAL_ERROR); 3066 goto err; 3067 } 3068 3069 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE; 3070 l2n3(n,d); 3071 3072 s->state=SSL3_ST_CW_KEY_EXCH_B; 3073 /* number of bytes to write */ 3074 s->init_num=n+4; 3075 s->init_off=0; 3076 } 3077 3078 /* SSL3_ST_CW_KEY_EXCH_B */ 3079 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 3080err: 3081#ifndef OPENSSL_NO_ECDH 3082 BN_CTX_free(bn_ctx); 3083 if (encodedPoint != NULL) OPENSSL_free(encodedPoint); 3084 if (clnt_ecdh != NULL) 3085 EC_KEY_free(clnt_ecdh); 3086 EVP_PKEY_free(srvr_pub_pkey); 3087#endif 3088 return(-1); 3089 } 3090 3091int ssl3_send_client_verify(SSL *s) 3092 { 3093 unsigned char *p,*d; 3094 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH]; 3095 EVP_PKEY *pkey; 3096 EVP_PKEY_CTX *pctx=NULL; 3097 EVP_MD_CTX mctx; 3098 unsigned u=0; 3099 unsigned long n; 3100 int j; 3101 3102 EVP_MD_CTX_init(&mctx); 3103 3104 if (s->state == SSL3_ST_CW_CERT_VRFY_A) 3105 { 3106 d=(unsigned char *)s->init_buf->data; 3107 p= &(d[4]); 3108 pkey=s->cert->key->privatekey; 3109/* Create context from key and test if sha1 is allowed as digest */ 3110 pctx = EVP_PKEY_CTX_new(pkey,NULL); 3111 EVP_PKEY_sign_init(pctx); 3112 if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1())>0) 3113 { 3114 if (TLS1_get_version(s) < TLS1_2_VERSION) 3115 s->method->ssl3_enc->cert_verify_mac(s, 3116 NID_sha1, 3117 &(data[MD5_DIGEST_LENGTH])); 3118 } 3119 else 3120 { 3121 ERR_clear_error(); 3122 } 3123 /* For TLS v1.2 send signature algorithm and signature 3124 * using agreed digest and cached handshake records. 3125 */ 3126 if (TLS1_get_version(s) >= TLS1_2_VERSION) 3127 { 3128 long hdatalen = 0; 3129 void *hdata; 3130 const EVP_MD *md = s->cert->key->digest; 3131 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, 3132 &hdata); 3133 if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md)) 3134 { 3135 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, 3136 ERR_R_INTERNAL_ERROR); 3137 goto err; 3138 } 3139 p += 2; 3140#ifdef SSL_DEBUG 3141 fprintf(stderr, "Using TLS 1.2 with client alg %s\n", 3142 EVP_MD_name(md)); 3143#endif 3144 if (!EVP_SignInit_ex(&mctx, md, NULL) 3145 || !EVP_SignUpdate(&mctx, hdata, hdatalen) 3146 || !EVP_SignFinal(&mctx, p + 2, &u, pkey)) 3147 { 3148 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, 3149 ERR_R_EVP_LIB); 3150 goto err; 3151 } 3152 s2n(u,p); 3153 n = u + 4; 3154 if (!ssl3_digest_cached_records(s)) 3155 goto err; 3156 } 3157 else 3158#ifndef OPENSSL_NO_RSA 3159 if (pkey->type == EVP_PKEY_RSA) 3160 { 3161 s->method->ssl3_enc->cert_verify_mac(s, 3162 NID_md5, 3163 &(data[0])); 3164 if (RSA_sign(NID_md5_sha1, data, 3165 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH, 3166 &(p[2]), &u, pkey->pkey.rsa) <= 0 ) 3167 { 3168 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB); 3169 goto err; 3170 } 3171 s2n(u,p); 3172 n=u+2; 3173 } 3174 else 3175#endif 3176#ifndef OPENSSL_NO_DSA 3177 if (pkey->type == EVP_PKEY_DSA) 3178 { 3179 if (!DSA_sign(pkey->save_type, 3180 &(data[MD5_DIGEST_LENGTH]), 3181 SHA_DIGEST_LENGTH,&(p[2]), 3182 (unsigned int *)&j,pkey->pkey.dsa)) 3183 { 3184 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB); 3185 goto err; 3186 } 3187 s2n(j,p); 3188 n=j+2; 3189 } 3190 else 3191#endif 3192#ifndef OPENSSL_NO_ECDSA 3193 if (pkey->type == EVP_PKEY_EC) 3194 { 3195 if (!ECDSA_sign(pkey->save_type, 3196 &(data[MD5_DIGEST_LENGTH]), 3197 SHA_DIGEST_LENGTH,&(p[2]), 3198 (unsigned int *)&j,pkey->pkey.ec)) 3199 { 3200 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, 3201 ERR_R_ECDSA_LIB); 3202 goto err; 3203 } 3204 s2n(j,p); 3205 n=j+2; 3206 } 3207 else 3208#endif 3209 if (pkey->type == NID_id_GostR3410_94 || pkey->type == NID_id_GostR3410_2001) 3210 { 3211 unsigned char signbuf[64]; 3212 int i; 3213 size_t sigsize=64; 3214 s->method->ssl3_enc->cert_verify_mac(s, 3215 NID_id_GostR3411_94, 3216 data); 3217 if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) { 3218 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, 3219 ERR_R_INTERNAL_ERROR); 3220 goto err; 3221 } 3222 for (i=63,j=0; i>=0; j++, i--) { 3223 p[2+j]=signbuf[i]; 3224 } 3225 s2n(j,p); 3226 n=j+2; 3227 } 3228 else 3229 { 3230 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR); 3231 goto err; 3232 } 3233 *(d++)=SSL3_MT_CERTIFICATE_VERIFY; 3234 l2n3(n,d); 3235 3236 s->state=SSL3_ST_CW_CERT_VRFY_B; 3237 s->init_num=(int)n+4; 3238 s->init_off=0; 3239 } 3240 EVP_MD_CTX_cleanup(&mctx); 3241 EVP_PKEY_CTX_free(pctx); 3242 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 3243err: 3244 EVP_MD_CTX_cleanup(&mctx); 3245 EVP_PKEY_CTX_free(pctx); 3246 return(-1); 3247 } 3248 3249int ssl3_send_client_certificate(SSL *s) 3250 { 3251 X509 *x509=NULL; 3252 EVP_PKEY *pkey=NULL; 3253 int i; 3254 unsigned long l; 3255 3256 if (s->state == SSL3_ST_CW_CERT_A) 3257 { 3258 if ((s->cert == NULL) || 3259 (s->cert->key->x509 == NULL) || 3260 (s->cert->key->privatekey == NULL)) 3261 s->state=SSL3_ST_CW_CERT_B; 3262 else 3263 s->state=SSL3_ST_CW_CERT_C; 3264 } 3265 3266 /* We need to get a client cert */ 3267 if (s->state == SSL3_ST_CW_CERT_B) 3268 { 3269 /* If we get an error, we need to 3270 * ssl->rwstate=SSL_X509_LOOKUP; return(-1); 3271 * We then get retied later */ 3272 i=0; 3273 i = ssl_do_client_cert_cb(s, &x509, &pkey); 3274 if (i < 0) 3275 { 3276 s->rwstate=SSL_X509_LOOKUP; 3277 return(-1); 3278 } 3279 s->rwstate=SSL_NOTHING; 3280 if ((i == 1) && (pkey != NULL) && (x509 != NULL)) 3281 { 3282 s->state=SSL3_ST_CW_CERT_B; 3283 if ( !SSL_use_certificate(s,x509) || 3284 !SSL_use_PrivateKey(s,pkey)) 3285 i=0; 3286 } 3287 else if (i == 1) 3288 { 3289 i=0; 3290 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); 3291 } 3292 3293 if (x509 != NULL) X509_free(x509); 3294 if (pkey != NULL) EVP_PKEY_free(pkey); 3295 if (i == 0) 3296 { 3297 if (s->version == SSL3_VERSION) 3298 { 3299 s->s3->tmp.cert_req=0; 3300 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE); 3301 return(1); 3302 } 3303 else 3304 { 3305 s->s3->tmp.cert_req=2; 3306 } 3307 } 3308 3309 /* Ok, we have a cert */ 3310 s->state=SSL3_ST_CW_CERT_C; 3311 } 3312 3313 if (s->state == SSL3_ST_CW_CERT_C) 3314 { 3315 s->state=SSL3_ST_CW_CERT_D; 3316 l=ssl3_output_cert_chain(s, 3317 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509); 3318 s->init_num=(int)l; 3319 s->init_off=0; 3320 } 3321 /* SSL3_ST_CW_CERT_D */ 3322 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 3323 } 3324 3325#define has_bits(i,m) (((i)&(m)) == (m)) 3326 3327int ssl3_check_cert_and_algorithm(SSL *s) 3328 { 3329 int i,idx; 3330 long alg_k,alg_a; 3331 EVP_PKEY *pkey=NULL; 3332 SESS_CERT *sc; 3333#ifndef OPENSSL_NO_RSA 3334 RSA *rsa; 3335#endif 3336#ifndef OPENSSL_NO_DH 3337 DH *dh; 3338#endif 3339 3340 alg_k=s->s3->tmp.new_cipher->algorithm_mkey; 3341 alg_a=s->s3->tmp.new_cipher->algorithm_auth; 3342 3343 /* we don't have a certificate */ 3344 if ((alg_a & (SSL_aDH|SSL_aNULL|SSL_aKRB5)) || (alg_k & SSL_kPSK)) 3345 return(1); 3346 3347 sc=s->session->sess_cert; 3348 if (sc == NULL) 3349 { 3350 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR); 3351 goto err; 3352 } 3353 3354#ifndef OPENSSL_NO_RSA 3355 rsa=s->session->sess_cert->peer_rsa_tmp; 3356#endif 3357#ifndef OPENSSL_NO_DH 3358 dh=s->session->sess_cert->peer_dh_tmp; 3359#endif 3360 3361 /* This is the passed certificate */ 3362 3363 idx=sc->peer_cert_type; 3364#ifndef OPENSSL_NO_ECDH 3365 if (idx == SSL_PKEY_ECC) 3366 { 3367 if (ssl_check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509, 3368 s) == 0) 3369 { /* check failed */ 3370 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT); 3371 goto f_err; 3372 } 3373 else 3374 { 3375 return 1; 3376 } 3377 } 3378#endif 3379 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509); 3380 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey); 3381 EVP_PKEY_free(pkey); 3382 3383 3384 /* Check that we have a certificate if we require one */ 3385 if ((alg_a & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN)) 3386 { 3387 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT); 3388 goto f_err; 3389 } 3390#ifndef OPENSSL_NO_DSA 3391 else if ((alg_a & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN)) 3392 { 3393 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT); 3394 goto f_err; 3395 } 3396#endif 3397#ifndef OPENSSL_NO_RSA 3398 if ((alg_k & SSL_kRSA) && 3399 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL))) 3400 { 3401 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT); 3402 goto f_err; 3403 } 3404#endif 3405#ifndef OPENSSL_NO_DH 3406 if ((alg_k & SSL_kEDH) && 3407 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL))) 3408 { 3409 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY); 3410 goto f_err; 3411 } 3412 else if ((alg_k & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA)) 3413 { 3414 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT); 3415 goto f_err; 3416 } 3417#ifndef OPENSSL_NO_DSA 3418 else if ((alg_k & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA)) 3419 { 3420 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT); 3421 goto f_err; 3422 } 3423#endif 3424#endif 3425 3426 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP)) 3427 { 3428#ifndef OPENSSL_NO_RSA 3429 if (alg_k & SSL_kRSA) 3430 { 3431 if (rsa == NULL 3432 || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) 3433 { 3434 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY); 3435 goto f_err; 3436 } 3437 } 3438 else 3439#endif 3440#ifndef OPENSSL_NO_DH 3441 if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) 3442 { 3443 if (dh == NULL 3444 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) 3445 { 3446 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY); 3447 goto f_err; 3448 } 3449 } 3450 else 3451#endif 3452 { 3453 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE); 3454 goto f_err; 3455 } 3456 } 3457 return(1); 3458f_err: 3459 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); 3460err: 3461 return(0); 3462 } 3463 3464#if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG) 3465int ssl3_send_next_proto(SSL *s) 3466 { 3467 unsigned int len, padding_len; 3468 unsigned char *d; 3469 3470 if (s->state == SSL3_ST_CW_NEXT_PROTO_A) 3471 { 3472 len = s->next_proto_negotiated_len; 3473 padding_len = 32 - ((len + 2) % 32); 3474 d = (unsigned char *)s->init_buf->data; 3475 d[4] = len; 3476 memcpy(d + 5, s->next_proto_negotiated, len); 3477 d[5 + len] = padding_len; 3478 memset(d + 6 + len, 0, padding_len); 3479 *(d++)=SSL3_MT_NEXT_PROTO; 3480 l2n3(2 + len + padding_len, d); 3481 s->state = SSL3_ST_CW_NEXT_PROTO_B; 3482 s->init_num = 4 + 2 + len + padding_len; 3483 s->init_off = 0; 3484 } 3485 3486 return ssl3_do_write(s, SSL3_RT_HANDSHAKE); 3487} 3488#endif /* !OPENSSL_NO_TLSEXT && !OPENSSL_NO_NEXTPROTONEG */ 3489 3490/* Check to see if handshake is full or resumed. Usually this is just a 3491 * case of checking to see if a cache hit has occurred. In the case of 3492 * session tickets we have to check the next message to be sure. 3493 */ 3494 3495#ifndef OPENSSL_NO_TLSEXT 3496int ssl3_check_finished(SSL *s) 3497 { 3498 int ok; 3499 long n; 3500 /* If we have no ticket it cannot be a resumed session. */ 3501 if (!s->session->tlsext_tick) 3502 return 1; 3503 /* this function is called when we really expect a Certificate 3504 * message, so permit appropriate message length */ 3505 n=s->method->ssl_get_message(s, 3506 SSL3_ST_CR_CERT_A, 3507 SSL3_ST_CR_CERT_B, 3508 -1, 3509 s->max_cert_list, 3510 &ok); 3511 if (!ok) return((int)n); 3512 s->s3->tmp.reuse_message = 1; 3513 if ((s->s3->tmp.message_type == SSL3_MT_FINISHED) 3514 || (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET)) 3515 return 2; 3516 3517 return 1; 3518 } 3519#endif 3520 3521int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey) 3522 { 3523 int i = 0; 3524#ifndef OPENSSL_NO_ENGINE 3525 if (s->ctx->client_cert_engine) 3526 { 3527 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s, 3528 SSL_get_client_CA_list(s), 3529 px509, ppkey, NULL, NULL, NULL); 3530 if (i != 0) 3531 return i; 3532 } 3533#endif 3534 if (s->ctx->client_cert_cb) 3535 i = s->ctx->client_cert_cb(s,px509,ppkey); 3536 return i; 3537 } 3538