s3_clnt.c revision 246772
1/* ssl/s3_clnt.c */ 2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay@cryptsoft.com). 7 * The implementation was written so as to conform with Netscapes SSL. 8 * 9 * This library is free for commercial and non-commercial use as long as 10 * the following conditions are aheared to. The following conditions 11 * apply to all code found in this distribution, be it the RC4, RSA, 12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13 * included with this distribution is covered by the same copyright terms 14 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15 * 16 * Copyright remains Eric Young's, and as such any Copyright notices in 17 * the code are not to be removed. 18 * If this package is used in a product, Eric Young should be given attribution 19 * as the author of the parts of the library used. 20 * This can be in the form of a textual message at program startup or 21 * in documentation (online or textual) provided with the package. 22 * 23 * Redistribution and use in source and binary forms, with or without 24 * modification, are permitted provided that the following conditions 25 * are met: 26 * 1. Redistributions of source code must retain the copyright 27 * notice, this list of conditions and the following disclaimer. 28 * 2. Redistributions in binary form must reproduce the above copyright 29 * notice, this list of conditions and the following disclaimer in the 30 * documentation and/or other materials provided with the distribution. 31 * 3. All advertising materials mentioning features or use of this software 32 * must display the following acknowledgement: 33 * "This product includes cryptographic software written by 34 * Eric Young (eay@cryptsoft.com)" 35 * The word 'cryptographic' can be left out if the rouines from the library 36 * being used are not cryptographic related :-). 37 * 4. If you include any Windows specific code (or a derivative thereof) from 38 * the apps directory (application code) you must include an acknowledgement: 39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40 * 41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51 * SUCH DAMAGE. 52 * 53 * The licence and distribution terms for any publically available version or 54 * derivative of this code cannot be changed. i.e. this code cannot simply be 55 * copied and put under another distribution licence 56 * [including the GNU Public Licence.] 57 */ 58/* ==================================================================== 59 * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved. 60 * 61 * Redistribution and use in source and binary forms, with or without 62 * modification, are permitted provided that the following conditions 63 * are met: 64 * 65 * 1. Redistributions of source code must retain the above copyright 66 * notice, this list of conditions and the following disclaimer. 67 * 68 * 2. Redistributions in binary form must reproduce the above copyright 69 * notice, this list of conditions and the following disclaimer in 70 * the documentation and/or other materials provided with the 71 * distribution. 72 * 73 * 3. All advertising materials mentioning features or use of this 74 * software must display the following acknowledgment: 75 * "This product includes software developed by the OpenSSL Project 76 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" 77 * 78 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 79 * endorse or promote products derived from this software without 80 * prior written permission. For written permission, please contact 81 * openssl-core@openssl.org. 82 * 83 * 5. Products derived from this software may not be called "OpenSSL" 84 * nor may "OpenSSL" appear in their names without prior written 85 * permission of the OpenSSL Project. 86 * 87 * 6. Redistributions of any form whatsoever must retain the following 88 * acknowledgment: 89 * "This product includes software developed by the OpenSSL Project 90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)" 91 * 92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 103 * OF THE POSSIBILITY OF SUCH DAMAGE. 104 * ==================================================================== 105 * 106 * This product includes cryptographic software written by Eric Young 107 * (eay@cryptsoft.com). This product includes software written by Tim 108 * Hudson (tjh@cryptsoft.com). 109 * 110 */ 111/* ==================================================================== 112 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. 113 * 114 * Portions of the attached software ("Contribution") are developed by 115 * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project. 116 * 117 * The Contribution is licensed pursuant to the OpenSSL open source 118 * license provided above. 119 * 120 * ECC cipher suite support in OpenSSL originally written by 121 * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories. 122 * 123 */ 124/* ==================================================================== 125 * Copyright 2005 Nokia. All rights reserved. 126 * 127 * The portions of the attached software ("Contribution") is developed by 128 * Nokia Corporation and is licensed pursuant to the OpenSSL open source 129 * license. 130 * 131 * The Contribution, originally written by Mika Kousa and Pasi Eronen of 132 * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites 133 * support (see RFC 4279) to OpenSSL. 134 * 135 * No patent licenses or other rights except those expressly stated in 136 * the OpenSSL open source license shall be deemed granted or received 137 * expressly, by implication, estoppel, or otherwise. 138 * 139 * No assurances are provided by Nokia that the Contribution does not 140 * infringe the patent or other intellectual property rights of any third 141 * party or that the license provides you with all the necessary rights 142 * to make use of the Contribution. 143 * 144 * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN 145 * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA 146 * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY 147 * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR 148 * OTHERWISE. 149 */ 150 151#include <stdio.h> 152#include "ssl_locl.h" 153#include "kssl_lcl.h" 154#include <openssl/buffer.h> 155#include <openssl/rand.h> 156#include <openssl/objects.h> 157#include <openssl/evp.h> 158#include <openssl/md5.h> 159#ifdef OPENSSL_FIPS 160#include <openssl/fips.h> 161#endif 162#ifndef OPENSSL_NO_DH 163#include <openssl/dh.h> 164#endif 165#include <openssl/bn.h> 166#ifndef OPENSSL_NO_ENGINE 167#include <openssl/engine.h> 168#endif 169 170static const SSL_METHOD *ssl3_get_client_method(int ver); 171static int ca_dn_cmp(const X509_NAME * const *a,const X509_NAME * const *b); 172 173static const SSL_METHOD *ssl3_get_client_method(int ver) 174 { 175 if (ver == SSL3_VERSION) 176 return(SSLv3_client_method()); 177 else 178 return(NULL); 179 } 180 181IMPLEMENT_ssl3_meth_func(SSLv3_client_method, 182 ssl_undefined_function, 183 ssl3_connect, 184 ssl3_get_client_method) 185 186int ssl3_connect(SSL *s) 187 { 188 BUF_MEM *buf=NULL; 189 unsigned long Time=(unsigned long)time(NULL); 190 void (*cb)(const SSL *ssl,int type,int val)=NULL; 191 int ret= -1; 192 int new_state,state,skip=0; 193 194 RAND_add(&Time,sizeof(Time),0); 195 ERR_clear_error(); 196 clear_sys_error(); 197 198 if (s->info_callback != NULL) 199 cb=s->info_callback; 200 else if (s->ctx->info_callback != NULL) 201 cb=s->ctx->info_callback; 202 203 s->in_handshake++; 204 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); 205 206#ifndef OPENSSL_NO_HEARTBEATS 207 /* If we're awaiting a HeartbeatResponse, pretend we 208 * already got and don't await it anymore, because 209 * Heartbeats don't make sense during handshakes anyway. 210 */ 211 if (s->tlsext_hb_pending) 212 { 213 s->tlsext_hb_pending = 0; 214 s->tlsext_hb_seq++; 215 } 216#endif 217 218 for (;;) 219 { 220 state=s->state; 221 222 switch(s->state) 223 { 224 case SSL_ST_RENEGOTIATE: 225 s->renegotiate=1; 226 s->state=SSL_ST_CONNECT; 227 s->ctx->stats.sess_connect_renegotiate++; 228 /* break */ 229 case SSL_ST_BEFORE: 230 case SSL_ST_CONNECT: 231 case SSL_ST_BEFORE|SSL_ST_CONNECT: 232 case SSL_ST_OK|SSL_ST_CONNECT: 233 234 s->server=0; 235 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1); 236 237 if ((s->version & 0xff00 ) != 0x0300) 238 { 239 SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR); 240 ret = -1; 241 goto end; 242 } 243 244 /* s->version=SSL3_VERSION; */ 245 s->type=SSL_ST_CONNECT; 246 247 if (s->init_buf == NULL) 248 { 249 if ((buf=BUF_MEM_new()) == NULL) 250 { 251 ret= -1; 252 goto end; 253 } 254 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH)) 255 { 256 ret= -1; 257 goto end; 258 } 259 s->init_buf=buf; 260 buf=NULL; 261 } 262 263 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; } 264 265 /* setup buffing BIO */ 266 if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; } 267 268 /* don't push the buffering BIO quite yet */ 269 270 ssl3_init_finished_mac(s); 271 272 s->state=SSL3_ST_CW_CLNT_HELLO_A; 273 s->ctx->stats.sess_connect++; 274 s->init_num=0; 275 break; 276 277 case SSL3_ST_CW_CLNT_HELLO_A: 278 case SSL3_ST_CW_CLNT_HELLO_B: 279 280 s->shutdown=0; 281 ret=ssl3_client_hello(s); 282 if (ret <= 0) goto end; 283 s->state=SSL3_ST_CR_SRVR_HELLO_A; 284 s->init_num=0; 285 286 /* turn on buffering for the next lot of output */ 287 if (s->bbio != s->wbio) 288 s->wbio=BIO_push(s->bbio,s->wbio); 289 290 break; 291 292 case SSL3_ST_CR_SRVR_HELLO_A: 293 case SSL3_ST_CR_SRVR_HELLO_B: 294 ret=ssl3_get_server_hello(s); 295 if (ret <= 0) goto end; 296 297 if (s->hit) 298 { 299 s->state=SSL3_ST_CR_FINISHED_A; 300#ifndef OPENSSL_NO_TLSEXT 301 if (s->tlsext_ticket_expected) 302 { 303 /* receive renewed session ticket */ 304 s->state=SSL3_ST_CR_SESSION_TICKET_A; 305 } 306#endif 307 } 308 else 309 s->state=SSL3_ST_CR_CERT_A; 310 s->init_num=0; 311 break; 312 313 case SSL3_ST_CR_CERT_A: 314 case SSL3_ST_CR_CERT_B: 315#ifndef OPENSSL_NO_TLSEXT 316 ret=ssl3_check_finished(s); 317 if (ret <= 0) goto end; 318 if (ret == 2) 319 { 320 s->hit = 1; 321 if (s->tlsext_ticket_expected) 322 s->state=SSL3_ST_CR_SESSION_TICKET_A; 323 else 324 s->state=SSL3_ST_CR_FINISHED_A; 325 s->init_num=0; 326 break; 327 } 328#endif 329 /* Check if it is anon DH/ECDH */ 330 /* or PSK */ 331 if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) && 332 !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) 333 { 334 ret=ssl3_get_server_certificate(s); 335 if (ret <= 0) goto end; 336#ifndef OPENSSL_NO_TLSEXT 337 if (s->tlsext_status_expected) 338 s->state=SSL3_ST_CR_CERT_STATUS_A; 339 else 340 s->state=SSL3_ST_CR_KEY_EXCH_A; 341 } 342 else 343 { 344 skip = 1; 345 s->state=SSL3_ST_CR_KEY_EXCH_A; 346 } 347#else 348 } 349 else 350 skip=1; 351 352 s->state=SSL3_ST_CR_KEY_EXCH_A; 353#endif 354 s->init_num=0; 355 break; 356 357 case SSL3_ST_CR_KEY_EXCH_A: 358 case SSL3_ST_CR_KEY_EXCH_B: 359 ret=ssl3_get_key_exchange(s); 360 if (ret <= 0) goto end; 361 s->state=SSL3_ST_CR_CERT_REQ_A; 362 s->init_num=0; 363 364 /* at this point we check that we have the 365 * required stuff from the server */ 366 if (!ssl3_check_cert_and_algorithm(s)) 367 { 368 ret= -1; 369 goto end; 370 } 371 break; 372 373 case SSL3_ST_CR_CERT_REQ_A: 374 case SSL3_ST_CR_CERT_REQ_B: 375 ret=ssl3_get_certificate_request(s); 376 if (ret <= 0) goto end; 377 s->state=SSL3_ST_CR_SRVR_DONE_A; 378 s->init_num=0; 379 break; 380 381 case SSL3_ST_CR_SRVR_DONE_A: 382 case SSL3_ST_CR_SRVR_DONE_B: 383 ret=ssl3_get_server_done(s); 384 if (ret <= 0) goto end; 385#ifndef OPENSSL_NO_SRP 386 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) 387 { 388 if ((ret = SRP_Calc_A_param(s))<=0) 389 { 390 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_SRP_A_CALC); 391 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR); 392 goto end; 393 } 394 } 395#endif 396 if (s->s3->tmp.cert_req) 397 s->state=SSL3_ST_CW_CERT_A; 398 else 399 s->state=SSL3_ST_CW_KEY_EXCH_A; 400 s->init_num=0; 401 402 break; 403 404 case SSL3_ST_CW_CERT_A: 405 case SSL3_ST_CW_CERT_B: 406 case SSL3_ST_CW_CERT_C: 407 case SSL3_ST_CW_CERT_D: 408 ret=ssl3_send_client_certificate(s); 409 if (ret <= 0) goto end; 410 s->state=SSL3_ST_CW_KEY_EXCH_A; 411 s->init_num=0; 412 break; 413 414 case SSL3_ST_CW_KEY_EXCH_A: 415 case SSL3_ST_CW_KEY_EXCH_B: 416 ret=ssl3_send_client_key_exchange(s); 417 if (ret <= 0) goto end; 418 /* EAY EAY EAY need to check for DH fix cert 419 * sent back */ 420 /* For TLS, cert_req is set to 2, so a cert chain 421 * of nothing is sent, but no verify packet is sent */ 422 /* XXX: For now, we do not support client 423 * authentication in ECDH cipher suites with 424 * ECDH (rather than ECDSA) certificates. 425 * We need to skip the certificate verify 426 * message when client's ECDH public key is sent 427 * inside the client certificate. 428 */ 429 if (s->s3->tmp.cert_req == 1) 430 { 431 s->state=SSL3_ST_CW_CERT_VRFY_A; 432 } 433 else 434 { 435 s->state=SSL3_ST_CW_CHANGE_A; 436 s->s3->change_cipher_spec=0; 437 } 438 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) 439 { 440 s->state=SSL3_ST_CW_CHANGE_A; 441 s->s3->change_cipher_spec=0; 442 } 443 444 s->init_num=0; 445 break; 446 447 case SSL3_ST_CW_CERT_VRFY_A: 448 case SSL3_ST_CW_CERT_VRFY_B: 449 ret=ssl3_send_client_verify(s); 450 if (ret <= 0) goto end; 451 s->state=SSL3_ST_CW_CHANGE_A; 452 s->init_num=0; 453 s->s3->change_cipher_spec=0; 454 break; 455 456 case SSL3_ST_CW_CHANGE_A: 457 case SSL3_ST_CW_CHANGE_B: 458 ret=ssl3_send_change_cipher_spec(s, 459 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B); 460 if (ret <= 0) goto end; 461 462#if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG) 463 s->state=SSL3_ST_CW_FINISHED_A; 464#else 465 if (s->s3->next_proto_neg_seen) 466 s->state=SSL3_ST_CW_NEXT_PROTO_A; 467 else 468 s->state=SSL3_ST_CW_FINISHED_A; 469#endif 470 s->init_num=0; 471 472 s->session->cipher=s->s3->tmp.new_cipher; 473#ifdef OPENSSL_NO_COMP 474 s->session->compress_meth=0; 475#else 476 if (s->s3->tmp.new_compression == NULL) 477 s->session->compress_meth=0; 478 else 479 s->session->compress_meth= 480 s->s3->tmp.new_compression->id; 481#endif 482 if (!s->method->ssl3_enc->setup_key_block(s)) 483 { 484 ret= -1; 485 goto end; 486 } 487 488 if (!s->method->ssl3_enc->change_cipher_state(s, 489 SSL3_CHANGE_CIPHER_CLIENT_WRITE)) 490 { 491 ret= -1; 492 goto end; 493 } 494 495 break; 496 497#if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG) 498 case SSL3_ST_CW_NEXT_PROTO_A: 499 case SSL3_ST_CW_NEXT_PROTO_B: 500 ret=ssl3_send_next_proto(s); 501 if (ret <= 0) goto end; 502 s->state=SSL3_ST_CW_FINISHED_A; 503 break; 504#endif 505 506 case SSL3_ST_CW_FINISHED_A: 507 case SSL3_ST_CW_FINISHED_B: 508 ret=ssl3_send_finished(s, 509 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B, 510 s->method->ssl3_enc->client_finished_label, 511 s->method->ssl3_enc->client_finished_label_len); 512 if (ret <= 0) goto end; 513 s->state=SSL3_ST_CW_FLUSH; 514 515 /* clear flags */ 516 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER; 517 if (s->hit) 518 { 519 s->s3->tmp.next_state=SSL_ST_OK; 520 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED) 521 { 522 s->state=SSL_ST_OK; 523 s->s3->flags|=SSL3_FLAGS_POP_BUFFER; 524 s->s3->delay_buf_pop_ret=0; 525 } 526 } 527 else 528 { 529#ifndef OPENSSL_NO_TLSEXT 530 /* Allow NewSessionTicket if ticket expected */ 531 if (s->tlsext_ticket_expected) 532 s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A; 533 else 534#endif 535 536 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A; 537 } 538 s->init_num=0; 539 break; 540 541#ifndef OPENSSL_NO_TLSEXT 542 case SSL3_ST_CR_SESSION_TICKET_A: 543 case SSL3_ST_CR_SESSION_TICKET_B: 544 ret=ssl3_get_new_session_ticket(s); 545 if (ret <= 0) goto end; 546 s->state=SSL3_ST_CR_FINISHED_A; 547 s->init_num=0; 548 break; 549 550 case SSL3_ST_CR_CERT_STATUS_A: 551 case SSL3_ST_CR_CERT_STATUS_B: 552 ret=ssl3_get_cert_status(s); 553 if (ret <= 0) goto end; 554 s->state=SSL3_ST_CR_KEY_EXCH_A; 555 s->init_num=0; 556 break; 557#endif 558 559 case SSL3_ST_CR_FINISHED_A: 560 case SSL3_ST_CR_FINISHED_B: 561 562 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A, 563 SSL3_ST_CR_FINISHED_B); 564 if (ret <= 0) goto end; 565 566 if (s->hit) 567 s->state=SSL3_ST_CW_CHANGE_A; 568 else 569 s->state=SSL_ST_OK; 570 s->init_num=0; 571 break; 572 573 case SSL3_ST_CW_FLUSH: 574 s->rwstate=SSL_WRITING; 575 if (BIO_flush(s->wbio) <= 0) 576 { 577 ret= -1; 578 goto end; 579 } 580 s->rwstate=SSL_NOTHING; 581 s->state=s->s3->tmp.next_state; 582 break; 583 584 case SSL_ST_OK: 585 /* clean a few things up */ 586 ssl3_cleanup_key_block(s); 587 588 if (s->init_buf != NULL) 589 { 590 BUF_MEM_free(s->init_buf); 591 s->init_buf=NULL; 592 } 593 594 /* If we are not 'joining' the last two packets, 595 * remove the buffering now */ 596 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER)) 597 ssl_free_wbio_buffer(s); 598 /* else do it later in ssl3_write */ 599 600 s->init_num=0; 601 s->renegotiate=0; 602 s->new_session=0; 603 604 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT); 605 if (s->hit) s->ctx->stats.sess_hit++; 606 607 ret=1; 608 /* s->server=0; */ 609 s->handshake_func=ssl3_connect; 610 s->ctx->stats.sess_connect_good++; 611 612 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1); 613 614 goto end; 615 /* break; */ 616 617 default: 618 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE); 619 ret= -1; 620 goto end; 621 /* break; */ 622 } 623 624 /* did we do anything */ 625 if (!s->s3->tmp.reuse_message && !skip) 626 { 627 if (s->debug) 628 { 629 if ((ret=BIO_flush(s->wbio)) <= 0) 630 goto end; 631 } 632 633 if ((cb != NULL) && (s->state != state)) 634 { 635 new_state=s->state; 636 s->state=state; 637 cb(s,SSL_CB_CONNECT_LOOP,1); 638 s->state=new_state; 639 } 640 } 641 skip=0; 642 } 643end: 644 s->in_handshake--; 645 if (buf != NULL) 646 BUF_MEM_free(buf); 647 if (cb != NULL) 648 cb(s,SSL_CB_CONNECT_EXIT,ret); 649 return(ret); 650 } 651 652 653int ssl3_client_hello(SSL *s) 654 { 655 unsigned char *buf; 656 unsigned char *p,*d; 657 int i; 658 unsigned long Time,l; 659#ifndef OPENSSL_NO_COMP 660 int j; 661 SSL_COMP *comp; 662#endif 663 664 buf=(unsigned char *)s->init_buf->data; 665 if (s->state == SSL3_ST_CW_CLNT_HELLO_A) 666 { 667 SSL_SESSION *sess = s->session; 668 if ((sess == NULL) || 669 (sess->ssl_version != s->version) || 670#ifdef OPENSSL_NO_TLSEXT 671 !sess->session_id_length || 672#else 673 (!sess->session_id_length && !sess->tlsext_tick) || 674#endif 675 (sess->not_resumable)) 676 { 677 if (!ssl_get_new_session(s,0)) 678 goto err; 679 } 680 /* else use the pre-loaded session */ 681 682 p=s->s3->client_random; 683 Time=(unsigned long)time(NULL); /* Time */ 684 l2n(Time,p); 685 if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0) 686 goto err; 687 688 /* Do the message type and length last */ 689 d=p= &(buf[4]); 690 691 /* version indicates the negotiated version: for example from 692 * an SSLv2/v3 compatible client hello). The client_version 693 * field is the maximum version we permit and it is also 694 * used in RSA encrypted premaster secrets. Some servers can 695 * choke if we initially report a higher version then 696 * renegotiate to a lower one in the premaster secret. This 697 * didn't happen with TLS 1.0 as most servers supported it 698 * but it can with TLS 1.1 or later if the server only supports 699 * 1.0. 700 * 701 * Possible scenario with previous logic: 702 * 1. Client hello indicates TLS 1.2 703 * 2. Server hello says TLS 1.0 704 * 3. RSA encrypted premaster secret uses 1.2. 705 * 4. Handhaked proceeds using TLS 1.0. 706 * 5. Server sends hello request to renegotiate. 707 * 6. Client hello indicates TLS v1.0 as we now 708 * know that is maximum server supports. 709 * 7. Server chokes on RSA encrypted premaster secret 710 * containing version 1.0. 711 * 712 * For interoperability it should be OK to always use the 713 * maximum version we support in client hello and then rely 714 * on the checking of version to ensure the servers isn't 715 * being inconsistent: for example initially negotiating with 716 * TLS 1.0 and renegotiating with TLS 1.2. We do this by using 717 * client_version in client hello and not resetting it to 718 * the negotiated version. 719 */ 720#if 0 721 *(p++)=s->version>>8; 722 *(p++)=s->version&0xff; 723 s->client_version=s->version; 724#else 725 *(p++)=s->client_version>>8; 726 *(p++)=s->client_version&0xff; 727#endif 728 729 /* Random stuff */ 730 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE); 731 p+=SSL3_RANDOM_SIZE; 732 733 /* Session ID */ 734 if (s->new_session) 735 i=0; 736 else 737 i=s->session->session_id_length; 738 *(p++)=i; 739 if (i != 0) 740 { 741 if (i > (int)sizeof(s->session->session_id)) 742 { 743 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); 744 goto err; 745 } 746 memcpy(p,s->session->session_id,i); 747 p+=i; 748 } 749 750 /* Ciphers supported */ 751 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0); 752 if (i == 0) 753 { 754 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE); 755 goto err; 756 } 757#ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH 758 /* Some servers hang if client hello > 256 bytes 759 * as hack workaround chop number of supported ciphers 760 * to keep it well below this if we use TLS v1.2 761 */ 762 if (TLS1_get_version(s) >= TLS1_2_VERSION 763 && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH) 764 i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1; 765#endif 766 s2n(i,p); 767 p+=i; 768 769 /* COMPRESSION */ 770#ifdef OPENSSL_NO_COMP 771 *(p++)=1; 772#else 773 774 if ((s->options & SSL_OP_NO_COMPRESSION) 775 || !s->ctx->comp_methods) 776 j=0; 777 else 778 j=sk_SSL_COMP_num(s->ctx->comp_methods); 779 *(p++)=1+j; 780 for (i=0; i<j; i++) 781 { 782 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i); 783 *(p++)=comp->id; 784 } 785#endif 786 *(p++)=0; /* Add the NULL method */ 787 788#ifndef OPENSSL_NO_TLSEXT 789 /* TLS extensions*/ 790 if (ssl_prepare_clienthello_tlsext(s) <= 0) 791 { 792 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT); 793 goto err; 794 } 795 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL) 796 { 797 SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR); 798 goto err; 799 } 800#endif 801 802 l=(p-d); 803 d=buf; 804 *(d++)=SSL3_MT_CLIENT_HELLO; 805 l2n3(l,d); 806 807 s->state=SSL3_ST_CW_CLNT_HELLO_B; 808 /* number of bytes to write */ 809 s->init_num=p-buf; 810 s->init_off=0; 811 } 812 813 /* SSL3_ST_CW_CLNT_HELLO_B */ 814 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 815err: 816 return(-1); 817 } 818 819int ssl3_get_server_hello(SSL *s) 820 { 821 STACK_OF(SSL_CIPHER) *sk; 822 const SSL_CIPHER *c; 823 unsigned char *p,*d; 824 int i,al,ok; 825 unsigned int j; 826 long n; 827#ifndef OPENSSL_NO_COMP 828 SSL_COMP *comp; 829#endif 830 831 n=s->method->ssl_get_message(s, 832 SSL3_ST_CR_SRVR_HELLO_A, 833 SSL3_ST_CR_SRVR_HELLO_B, 834 -1, 835 20000, /* ?? */ 836 &ok); 837 838 if (!ok) return((int)n); 839 840 if ( SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER) 841 { 842 if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST) 843 { 844 if ( s->d1->send_cookie == 0) 845 { 846 s->s3->tmp.reuse_message = 1; 847 return 1; 848 } 849 else /* already sent a cookie */ 850 { 851 al=SSL_AD_UNEXPECTED_MESSAGE; 852 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE); 853 goto f_err; 854 } 855 } 856 } 857 858 if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO) 859 { 860 al=SSL_AD_UNEXPECTED_MESSAGE; 861 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE); 862 goto f_err; 863 } 864 865 d=p=(unsigned char *)s->init_msg; 866 867 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff))) 868 { 869 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION); 870 s->version=(s->version&0xff00)|p[1]; 871 al=SSL_AD_PROTOCOL_VERSION; 872 goto f_err; 873 } 874 p+=2; 875 876 /* load the server hello data */ 877 /* load the server random */ 878 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE); 879 p+=SSL3_RANDOM_SIZE; 880 881 /* get the session-id */ 882 j= *(p++); 883 884 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE)) 885 { 886 al=SSL_AD_ILLEGAL_PARAMETER; 887 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG); 888 goto f_err; 889 } 890 891#ifndef OPENSSL_NO_TLSEXT 892 /* check if we want to resume the session based on external pre-shared secret */ 893 if (s->version >= TLS1_VERSION && s->tls_session_secret_cb) 894 { 895 SSL_CIPHER *pref_cipher=NULL; 896 s->session->master_key_length=sizeof(s->session->master_key); 897 if (s->tls_session_secret_cb(s, s->session->master_key, 898 &s->session->master_key_length, 899 NULL, &pref_cipher, 900 s->tls_session_secret_cb_arg)) 901 { 902 s->session->cipher = pref_cipher ? 903 pref_cipher : ssl_get_cipher_by_char(s, p+j); 904 } 905 } 906#endif /* OPENSSL_NO_TLSEXT */ 907 908 if (j != 0 && j == s->session->session_id_length 909 && memcmp(p,s->session->session_id,j) == 0) 910 { 911 if(s->sid_ctx_length != s->session->sid_ctx_length 912 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length)) 913 { 914 /* actually a client application bug */ 915 al=SSL_AD_ILLEGAL_PARAMETER; 916 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); 917 goto f_err; 918 } 919 s->hit=1; 920 } 921 else /* a miss or crap from the other end */ 922 { 923 /* If we were trying for session-id reuse, make a new 924 * SSL_SESSION so we don't stuff up other people */ 925 s->hit=0; 926 if (s->session->session_id_length > 0) 927 { 928 if (!ssl_get_new_session(s,0)) 929 { 930 al=SSL_AD_INTERNAL_ERROR; 931 goto f_err; 932 } 933 } 934 s->session->session_id_length=j; 935 memcpy(s->session->session_id,p,j); /* j could be 0 */ 936 } 937 p+=j; 938 c=ssl_get_cipher_by_char(s,p); 939 if (c == NULL) 940 { 941 /* unknown cipher */ 942 al=SSL_AD_ILLEGAL_PARAMETER; 943 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED); 944 goto f_err; 945 } 946 /* TLS v1.2 only ciphersuites require v1.2 or later */ 947 if ((c->algorithm_ssl & SSL_TLSV1_2) && 948 (TLS1_get_version(s) < TLS1_2_VERSION)) 949 { 950 al=SSL_AD_ILLEGAL_PARAMETER; 951 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED); 952 goto f_err; 953 } 954 p+=ssl_put_cipher_by_char(s,NULL,NULL); 955 956 sk=ssl_get_ciphers_by_id(s); 957 i=sk_SSL_CIPHER_find(sk,c); 958 if (i < 0) 959 { 960 /* we did not say we would use this cipher */ 961 al=SSL_AD_ILLEGAL_PARAMETER; 962 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED); 963 goto f_err; 964 } 965 966 /* Depending on the session caching (internal/external), the cipher 967 and/or cipher_id values may not be set. Make sure that 968 cipher_id is set and use it for comparison. */ 969 if (s->session->cipher) 970 s->session->cipher_id = s->session->cipher->id; 971 if (s->hit && (s->session->cipher_id != c->id)) 972 { 973/* Workaround is now obsolete */ 974#if 0 975 if (!(s->options & 976 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG)) 977#endif 978 { 979 al=SSL_AD_ILLEGAL_PARAMETER; 980 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); 981 goto f_err; 982 } 983 } 984 s->s3->tmp.new_cipher=c; 985 /* Don't digest cached records if TLS v1.2: we may need them for 986 * client authentication. 987 */ 988 if (TLS1_get_version(s) < TLS1_2_VERSION && !ssl3_digest_cached_records(s)) 989 { 990 al = SSL_AD_INTERNAL_ERROR; 991 goto f_err; 992 } 993 /* lets get the compression algorithm */ 994 /* COMPRESSION */ 995#ifdef OPENSSL_NO_COMP 996 if (*(p++) != 0) 997 { 998 al=SSL_AD_ILLEGAL_PARAMETER; 999 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); 1000 goto f_err; 1001 } 1002 /* If compression is disabled we'd better not try to resume a session 1003 * using compression. 1004 */ 1005 if (s->session->compress_meth != 0) 1006 { 1007 al=SSL_AD_INTERNAL_ERROR; 1008 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_INCONSISTENT_COMPRESSION); 1009 goto f_err; 1010 } 1011#else 1012 j= *(p++); 1013 if (s->hit && j != s->session->compress_meth) 1014 { 1015 al=SSL_AD_ILLEGAL_PARAMETER; 1016 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED); 1017 goto f_err; 1018 } 1019 if (j == 0) 1020 comp=NULL; 1021 else if (s->options & SSL_OP_NO_COMPRESSION) 1022 { 1023 al=SSL_AD_ILLEGAL_PARAMETER; 1024 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_COMPRESSION_DISABLED); 1025 goto f_err; 1026 } 1027 else 1028 comp=ssl3_comp_find(s->ctx->comp_methods,j); 1029 1030 if ((j != 0) && (comp == NULL)) 1031 { 1032 al=SSL_AD_ILLEGAL_PARAMETER; 1033 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); 1034 goto f_err; 1035 } 1036 else 1037 { 1038 s->s3->tmp.new_compression=comp; 1039 } 1040#endif 1041 1042#ifndef OPENSSL_NO_TLSEXT 1043 /* TLS extensions*/ 1044 if (s->version >= SSL3_VERSION) 1045 { 1046 if (!ssl_parse_serverhello_tlsext(s,&p,d,n, &al)) 1047 { 1048 /* 'al' set by ssl_parse_serverhello_tlsext */ 1049 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT); 1050 goto f_err; 1051 } 1052 if (ssl_check_serverhello_tlsext(s) <= 0) 1053 { 1054 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SERVERHELLO_TLSEXT); 1055 goto err; 1056 } 1057 } 1058#endif 1059 1060 if (p != (d+n)) 1061 { 1062 /* wrong packet length */ 1063 al=SSL_AD_DECODE_ERROR; 1064 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH); 1065 goto f_err; 1066 } 1067 1068 return(1); 1069f_err: 1070 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1071err: 1072 return(-1); 1073 } 1074 1075int ssl3_get_server_certificate(SSL *s) 1076 { 1077 int al,i,ok,ret= -1; 1078 unsigned long n,nc,llen,l; 1079 X509 *x=NULL; 1080 const unsigned char *q,*p; 1081 unsigned char *d; 1082 STACK_OF(X509) *sk=NULL; 1083 SESS_CERT *sc; 1084 EVP_PKEY *pkey=NULL; 1085 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */ 1086 1087 n=s->method->ssl_get_message(s, 1088 SSL3_ST_CR_CERT_A, 1089 SSL3_ST_CR_CERT_B, 1090 -1, 1091 s->max_cert_list, 1092 &ok); 1093 1094 if (!ok) return((int)n); 1095 1096 if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) || 1097 ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) && 1098 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE))) 1099 { 1100 s->s3->tmp.reuse_message=1; 1101 return(1); 1102 } 1103 1104 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE) 1105 { 1106 al=SSL_AD_UNEXPECTED_MESSAGE; 1107 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE); 1108 goto f_err; 1109 } 1110 p=d=(unsigned char *)s->init_msg; 1111 1112 if ((sk=sk_X509_new_null()) == NULL) 1113 { 1114 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE); 1115 goto err; 1116 } 1117 1118 n2l3(p,llen); 1119 if (llen+3 != n) 1120 { 1121 al=SSL_AD_DECODE_ERROR; 1122 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH); 1123 goto f_err; 1124 } 1125 for (nc=0; nc<llen; ) 1126 { 1127 n2l3(p,l); 1128 if ((l+nc+3) > llen) 1129 { 1130 al=SSL_AD_DECODE_ERROR; 1131 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); 1132 goto f_err; 1133 } 1134 1135 q=p; 1136 x=d2i_X509(NULL,&q,l); 1137 if (x == NULL) 1138 { 1139 al=SSL_AD_BAD_CERTIFICATE; 1140 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB); 1141 goto f_err; 1142 } 1143 if (q != (p+l)) 1144 { 1145 al=SSL_AD_DECODE_ERROR; 1146 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); 1147 goto f_err; 1148 } 1149 if (!sk_X509_push(sk,x)) 1150 { 1151 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE); 1152 goto err; 1153 } 1154 x=NULL; 1155 nc+=l+3; 1156 p=q; 1157 } 1158 1159 i=ssl_verify_cert_chain(s,sk); 1160 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0) 1161#ifndef OPENSSL_NO_KRB5 1162 && !((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) && 1163 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5)) 1164#endif /* OPENSSL_NO_KRB5 */ 1165 ) 1166 { 1167 al=ssl_verify_alarm_type(s->verify_result); 1168 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED); 1169 goto f_err; 1170 } 1171 ERR_clear_error(); /* but we keep s->verify_result */ 1172 1173 sc=ssl_sess_cert_new(); 1174 if (sc == NULL) goto err; 1175 1176 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert); 1177 s->session->sess_cert=sc; 1178 1179 sc->cert_chain=sk; 1180 /* Inconsistency alert: cert_chain does include the peer's 1181 * certificate, which we don't include in s3_srvr.c */ 1182 x=sk_X509_value(sk,0); 1183 sk=NULL; 1184 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/ 1185 1186 pkey=X509_get_pubkey(x); 1187 1188 /* VRS: allow null cert if auth == KRB5 */ 1189 need_cert = ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) && 1190 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5)) 1191 ? 0 : 1; 1192 1193#ifdef KSSL_DEBUG 1194 printf("pkey,x = %p, %p\n", pkey,x); 1195 printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey)); 1196 printf("cipher, alg, nc = %s, %lx, %lx, %d\n", s->s3->tmp.new_cipher->name, 1197 s->s3->tmp.new_cipher->algorithm_mkey, s->s3->tmp.new_cipher->algorithm_auth, need_cert); 1198#endif /* KSSL_DEBUG */ 1199 1200 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey))) 1201 { 1202 x=NULL; 1203 al=SSL3_AL_FATAL; 1204 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 1205 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); 1206 goto f_err; 1207 } 1208 1209 i=ssl_cert_type(x,pkey); 1210 if (need_cert && i < 0) 1211 { 1212 x=NULL; 1213 al=SSL3_AL_FATAL; 1214 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 1215 SSL_R_UNKNOWN_CERTIFICATE_TYPE); 1216 goto f_err; 1217 } 1218 1219 if (need_cert) 1220 { 1221 sc->peer_cert_type=i; 1222 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509); 1223 /* Why would the following ever happen? 1224 * We just created sc a couple of lines ago. */ 1225 if (sc->peer_pkeys[i].x509 != NULL) 1226 X509_free(sc->peer_pkeys[i].x509); 1227 sc->peer_pkeys[i].x509=x; 1228 sc->peer_key= &(sc->peer_pkeys[i]); 1229 1230 if (s->session->peer != NULL) 1231 X509_free(s->session->peer); 1232 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509); 1233 s->session->peer=x; 1234 } 1235 else 1236 { 1237 sc->peer_cert_type=i; 1238 sc->peer_key= NULL; 1239 1240 if (s->session->peer != NULL) 1241 X509_free(s->session->peer); 1242 s->session->peer=NULL; 1243 } 1244 s->session->verify_result = s->verify_result; 1245 1246 x=NULL; 1247 ret=1; 1248 1249 if (0) 1250 { 1251f_err: 1252 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1253 } 1254err: 1255 EVP_PKEY_free(pkey); 1256 X509_free(x); 1257 sk_X509_pop_free(sk,X509_free); 1258 return(ret); 1259 } 1260 1261int ssl3_get_key_exchange(SSL *s) 1262 { 1263#ifndef OPENSSL_NO_RSA 1264 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2]; 1265#endif 1266 EVP_MD_CTX md_ctx; 1267 unsigned char *param,*p; 1268 int al,i,j,param_len,ok; 1269 long n,alg_k,alg_a; 1270 EVP_PKEY *pkey=NULL; 1271 const EVP_MD *md = NULL; 1272#ifndef OPENSSL_NO_RSA 1273 RSA *rsa=NULL; 1274#endif 1275#ifndef OPENSSL_NO_DH 1276 DH *dh=NULL; 1277#endif 1278#ifndef OPENSSL_NO_ECDH 1279 EC_KEY *ecdh = NULL; 1280 BN_CTX *bn_ctx = NULL; 1281 EC_POINT *srvr_ecpoint = NULL; 1282 int curve_nid = 0; 1283 int encoded_pt_len = 0; 1284#endif 1285 1286 /* use same message size as in ssl3_get_certificate_request() 1287 * as ServerKeyExchange message may be skipped */ 1288 n=s->method->ssl_get_message(s, 1289 SSL3_ST_CR_KEY_EXCH_A, 1290 SSL3_ST_CR_KEY_EXCH_B, 1291 -1, 1292 s->max_cert_list, 1293 &ok); 1294 if (!ok) return((int)n); 1295 1296 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE) 1297 { 1298#ifndef OPENSSL_NO_PSK 1299 /* In plain PSK ciphersuite, ServerKeyExchange can be 1300 omitted if no identity hint is sent. Set 1301 session->sess_cert anyway to avoid problems 1302 later.*/ 1303 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK) 1304 { 1305 s->session->sess_cert=ssl_sess_cert_new(); 1306 if (s->ctx->psk_identity_hint) 1307 OPENSSL_free(s->ctx->psk_identity_hint); 1308 s->ctx->psk_identity_hint = NULL; 1309 } 1310#endif 1311 s->s3->tmp.reuse_message=1; 1312 return(1); 1313 } 1314 1315 param=p=(unsigned char *)s->init_msg; 1316 if (s->session->sess_cert != NULL) 1317 { 1318#ifndef OPENSSL_NO_RSA 1319 if (s->session->sess_cert->peer_rsa_tmp != NULL) 1320 { 1321 RSA_free(s->session->sess_cert->peer_rsa_tmp); 1322 s->session->sess_cert->peer_rsa_tmp=NULL; 1323 } 1324#endif 1325#ifndef OPENSSL_NO_DH 1326 if (s->session->sess_cert->peer_dh_tmp) 1327 { 1328 DH_free(s->session->sess_cert->peer_dh_tmp); 1329 s->session->sess_cert->peer_dh_tmp=NULL; 1330 } 1331#endif 1332#ifndef OPENSSL_NO_ECDH 1333 if (s->session->sess_cert->peer_ecdh_tmp) 1334 { 1335 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp); 1336 s->session->sess_cert->peer_ecdh_tmp=NULL; 1337 } 1338#endif 1339 } 1340 else 1341 { 1342 s->session->sess_cert=ssl_sess_cert_new(); 1343 } 1344 1345 param_len=0; 1346 alg_k=s->s3->tmp.new_cipher->algorithm_mkey; 1347 alg_a=s->s3->tmp.new_cipher->algorithm_auth; 1348 EVP_MD_CTX_init(&md_ctx); 1349 1350#ifndef OPENSSL_NO_PSK 1351 if (alg_k & SSL_kPSK) 1352 { 1353 char tmp_id_hint[PSK_MAX_IDENTITY_LEN+1]; 1354 1355 al=SSL_AD_HANDSHAKE_FAILURE; 1356 n2s(p,i); 1357 param_len=i+2; 1358 /* Store PSK identity hint for later use, hint is used 1359 * in ssl3_send_client_key_exchange. Assume that the 1360 * maximum length of a PSK identity hint can be as 1361 * long as the maximum length of a PSK identity. */ 1362 if (i > PSK_MAX_IDENTITY_LEN) 1363 { 1364 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1365 SSL_R_DATA_LENGTH_TOO_LONG); 1366 goto f_err; 1367 } 1368 if (param_len > n) 1369 { 1370 al=SSL_AD_DECODE_ERROR; 1371 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1372 SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH); 1373 goto f_err; 1374 } 1375 /* If received PSK identity hint contains NULL 1376 * characters, the hint is truncated from the first 1377 * NULL. p may not be ending with NULL, so create a 1378 * NULL-terminated string. */ 1379 memcpy(tmp_id_hint, p, i); 1380 memset(tmp_id_hint+i, 0, PSK_MAX_IDENTITY_LEN+1-i); 1381 if (s->ctx->psk_identity_hint != NULL) 1382 OPENSSL_free(s->ctx->psk_identity_hint); 1383 s->ctx->psk_identity_hint = BUF_strdup(tmp_id_hint); 1384 if (s->ctx->psk_identity_hint == NULL) 1385 { 1386 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); 1387 goto f_err; 1388 } 1389 1390 p+=i; 1391 n-=param_len; 1392 } 1393 else 1394#endif /* !OPENSSL_NO_PSK */ 1395#ifndef OPENSSL_NO_SRP 1396 if (alg_k & SSL_kSRP) 1397 { 1398 n2s(p,i); 1399 param_len=i+2; 1400 if (param_len > n) 1401 { 1402 al=SSL_AD_DECODE_ERROR; 1403 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_N_LENGTH); 1404 goto f_err; 1405 } 1406 if (!(s->srp_ctx.N=BN_bin2bn(p,i,NULL))) 1407 { 1408 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1409 goto err; 1410 } 1411 p+=i; 1412 1413 n2s(p,i); 1414 param_len+=i+2; 1415 if (param_len > n) 1416 { 1417 al=SSL_AD_DECODE_ERROR; 1418 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_G_LENGTH); 1419 goto f_err; 1420 } 1421 if (!(s->srp_ctx.g=BN_bin2bn(p,i,NULL))) 1422 { 1423 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1424 goto err; 1425 } 1426 p+=i; 1427 1428 i = (unsigned int)(p[0]); 1429 p++; 1430 param_len+=i+1; 1431 if (param_len > n) 1432 { 1433 al=SSL_AD_DECODE_ERROR; 1434 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_S_LENGTH); 1435 goto f_err; 1436 } 1437 if (!(s->srp_ctx.s=BN_bin2bn(p,i,NULL))) 1438 { 1439 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1440 goto err; 1441 } 1442 p+=i; 1443 1444 n2s(p,i); 1445 param_len+=i+2; 1446 if (param_len > n) 1447 { 1448 al=SSL_AD_DECODE_ERROR; 1449 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_B_LENGTH); 1450 goto f_err; 1451 } 1452 if (!(s->srp_ctx.B=BN_bin2bn(p,i,NULL))) 1453 { 1454 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1455 goto err; 1456 } 1457 p+=i; 1458 n-=param_len; 1459 1460/* We must check if there is a certificate */ 1461#ifndef OPENSSL_NO_RSA 1462 if (alg_a & SSL_aRSA) 1463 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1464#else 1465 if (0) 1466 ; 1467#endif 1468#ifndef OPENSSL_NO_DSA 1469 else if (alg_a & SSL_aDSS) 1470 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509); 1471#endif 1472 } 1473 else 1474#endif /* !OPENSSL_NO_SRP */ 1475#ifndef OPENSSL_NO_RSA 1476 if (alg_k & SSL_kRSA) 1477 { 1478 if ((rsa=RSA_new()) == NULL) 1479 { 1480 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1481 goto err; 1482 } 1483 n2s(p,i); 1484 param_len=i+2; 1485 if (param_len > n) 1486 { 1487 al=SSL_AD_DECODE_ERROR; 1488 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH); 1489 goto f_err; 1490 } 1491 if (!(rsa->n=BN_bin2bn(p,i,rsa->n))) 1492 { 1493 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1494 goto err; 1495 } 1496 p+=i; 1497 1498 n2s(p,i); 1499 param_len+=i+2; 1500 if (param_len > n) 1501 { 1502 al=SSL_AD_DECODE_ERROR; 1503 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH); 1504 goto f_err; 1505 } 1506 if (!(rsa->e=BN_bin2bn(p,i,rsa->e))) 1507 { 1508 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1509 goto err; 1510 } 1511 p+=i; 1512 n-=param_len; 1513 1514 /* this should be because we are using an export cipher */ 1515 if (alg_a & SSL_aRSA) 1516 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1517 else 1518 { 1519 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1520 goto err; 1521 } 1522 s->session->sess_cert->peer_rsa_tmp=rsa; 1523 rsa=NULL; 1524 } 1525#else /* OPENSSL_NO_RSA */ 1526 if (0) 1527 ; 1528#endif 1529#ifndef OPENSSL_NO_DH 1530 else if (alg_k & SSL_kEDH) 1531 { 1532 if ((dh=DH_new()) == NULL) 1533 { 1534 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB); 1535 goto err; 1536 } 1537 n2s(p,i); 1538 param_len=i+2; 1539 if (param_len > n) 1540 { 1541 al=SSL_AD_DECODE_ERROR; 1542 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH); 1543 goto f_err; 1544 } 1545 if (!(dh->p=BN_bin2bn(p,i,NULL))) 1546 { 1547 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1548 goto err; 1549 } 1550 p+=i; 1551 1552 n2s(p,i); 1553 param_len+=i+2; 1554 if (param_len > n) 1555 { 1556 al=SSL_AD_DECODE_ERROR; 1557 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH); 1558 goto f_err; 1559 } 1560 if (!(dh->g=BN_bin2bn(p,i,NULL))) 1561 { 1562 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1563 goto err; 1564 } 1565 p+=i; 1566 1567 n2s(p,i); 1568 param_len+=i+2; 1569 if (param_len > n) 1570 { 1571 al=SSL_AD_DECODE_ERROR; 1572 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH); 1573 goto f_err; 1574 } 1575 if (!(dh->pub_key=BN_bin2bn(p,i,NULL))) 1576 { 1577 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1578 goto err; 1579 } 1580 p+=i; 1581 n-=param_len; 1582 1583#ifndef OPENSSL_NO_RSA 1584 if (alg_a & SSL_aRSA) 1585 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1586#else 1587 if (0) 1588 ; 1589#endif 1590#ifndef OPENSSL_NO_DSA 1591 else if (alg_a & SSL_aDSS) 1592 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509); 1593#endif 1594 /* else anonymous DH, so no certificate or pkey. */ 1595 1596 s->session->sess_cert->peer_dh_tmp=dh; 1597 dh=NULL; 1598 } 1599 else if ((alg_k & SSL_kDHr) || (alg_k & SSL_kDHd)) 1600 { 1601 al=SSL_AD_ILLEGAL_PARAMETER; 1602 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER); 1603 goto f_err; 1604 } 1605#endif /* !OPENSSL_NO_DH */ 1606 1607#ifndef OPENSSL_NO_ECDH 1608 else if (alg_k & SSL_kEECDH) 1609 { 1610 EC_GROUP *ngroup; 1611 const EC_GROUP *group; 1612 1613 if ((ecdh=EC_KEY_new()) == NULL) 1614 { 1615 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1616 goto err; 1617 } 1618 1619 /* Extract elliptic curve parameters and the 1620 * server's ephemeral ECDH public key. 1621 * Keep accumulating lengths of various components in 1622 * param_len and make sure it never exceeds n. 1623 */ 1624 1625 /* XXX: For now we only support named (not generic) curves 1626 * and the ECParameters in this case is just three bytes. 1627 */ 1628 param_len=3; 1629 if ((param_len > n) || 1630 (*p != NAMED_CURVE_TYPE) || 1631 ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0)) 1632 { 1633 al=SSL_AD_INTERNAL_ERROR; 1634 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); 1635 goto f_err; 1636 } 1637 1638 ngroup = EC_GROUP_new_by_curve_name(curve_nid); 1639 if (ngroup == NULL) 1640 { 1641 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB); 1642 goto err; 1643 } 1644 if (EC_KEY_set_group(ecdh, ngroup) == 0) 1645 { 1646 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB); 1647 goto err; 1648 } 1649 EC_GROUP_free(ngroup); 1650 1651 group = EC_KEY_get0_group(ecdh); 1652 1653 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && 1654 (EC_GROUP_get_degree(group) > 163)) 1655 { 1656 al=SSL_AD_EXPORT_RESTRICTION; 1657 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER); 1658 goto f_err; 1659 } 1660 1661 p+=3; 1662 1663 /* Next, get the encoded ECPoint */ 1664 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) || 1665 ((bn_ctx = BN_CTX_new()) == NULL)) 1666 { 1667 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1668 goto err; 1669 } 1670 1671 encoded_pt_len = *p; /* length of encoded point */ 1672 p+=1; 1673 param_len += (1 + encoded_pt_len); 1674 if ((param_len > n) || 1675 (EC_POINT_oct2point(group, srvr_ecpoint, 1676 p, encoded_pt_len, bn_ctx) == 0)) 1677 { 1678 al=SSL_AD_DECODE_ERROR; 1679 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT); 1680 goto f_err; 1681 } 1682 1683 n-=param_len; 1684 p+=encoded_pt_len; 1685 1686 /* The ECC/TLS specification does not mention 1687 * the use of DSA to sign ECParameters in the server 1688 * key exchange message. We do support RSA and ECDSA. 1689 */ 1690 if (0) ; 1691#ifndef OPENSSL_NO_RSA 1692 else if (alg_a & SSL_aRSA) 1693 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1694#endif 1695#ifndef OPENSSL_NO_ECDSA 1696 else if (alg_a & SSL_aECDSA) 1697 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509); 1698#endif 1699 /* else anonymous ECDH, so no certificate or pkey. */ 1700 EC_KEY_set_public_key(ecdh, srvr_ecpoint); 1701 s->session->sess_cert->peer_ecdh_tmp=ecdh; 1702 ecdh=NULL; 1703 BN_CTX_free(bn_ctx); 1704 bn_ctx = NULL; 1705 EC_POINT_free(srvr_ecpoint); 1706 srvr_ecpoint = NULL; 1707 } 1708 else if (alg_k) 1709 { 1710 al=SSL_AD_UNEXPECTED_MESSAGE; 1711 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE); 1712 goto f_err; 1713 } 1714#endif /* !OPENSSL_NO_ECDH */ 1715 1716 1717 /* p points to the next byte, there are 'n' bytes left */ 1718 1719 /* if it was signed, check the signature */ 1720 if (pkey != NULL) 1721 { 1722 if (TLS1_get_version(s) >= TLS1_2_VERSION) 1723 { 1724 int sigalg = tls12_get_sigid(pkey); 1725 /* Should never happen */ 1726 if (sigalg == -1) 1727 { 1728 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1729 goto err; 1730 } 1731 /* Check key type is consistent with signature */ 1732 if (sigalg != (int)p[1]) 1733 { 1734 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_TYPE); 1735 al=SSL_AD_DECODE_ERROR; 1736 goto f_err; 1737 } 1738 md = tls12_get_hash(p[0]); 1739 if (md == NULL) 1740 { 1741 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNKNOWN_DIGEST); 1742 al=SSL_AD_DECODE_ERROR; 1743 goto f_err; 1744 } 1745#ifdef SSL_DEBUG 1746fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md)); 1747#endif 1748 p += 2; 1749 n -= 2; 1750 } 1751 else 1752 md = EVP_sha1(); 1753 1754 n2s(p,i); 1755 n-=2; 1756 j=EVP_PKEY_size(pkey); 1757 1758 if ((i != n) || (n > j) || (n <= 0)) 1759 { 1760 /* wrong packet length */ 1761 al=SSL_AD_DECODE_ERROR; 1762 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH); 1763 goto f_err; 1764 } 1765 1766#ifndef OPENSSL_NO_RSA 1767 if (pkey->type == EVP_PKEY_RSA && TLS1_get_version(s) < TLS1_2_VERSION) 1768 { 1769 int num; 1770 1771 j=0; 1772 q=md_buf; 1773 for (num=2; num > 0; num--) 1774 { 1775 EVP_MD_CTX_set_flags(&md_ctx, 1776 EVP_MD_CTX_FLAG_NON_FIPS_ALLOW); 1777 EVP_DigestInit_ex(&md_ctx,(num == 2) 1778 ?s->ctx->md5:s->ctx->sha1, NULL); 1779 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); 1780 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); 1781 EVP_DigestUpdate(&md_ctx,param,param_len); 1782 EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i); 1783 q+=i; 1784 j+=i; 1785 } 1786 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n, 1787 pkey->pkey.rsa); 1788 if (i < 0) 1789 { 1790 al=SSL_AD_DECRYPT_ERROR; 1791 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT); 1792 goto f_err; 1793 } 1794 if (i == 0) 1795 { 1796 /* bad signature */ 1797 al=SSL_AD_DECRYPT_ERROR; 1798 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE); 1799 goto f_err; 1800 } 1801 } 1802 else 1803#endif 1804 { 1805 EVP_VerifyInit_ex(&md_ctx, md, NULL); 1806 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); 1807 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); 1808 EVP_VerifyUpdate(&md_ctx,param,param_len); 1809 if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0) 1810 { 1811 /* bad signature */ 1812 al=SSL_AD_DECRYPT_ERROR; 1813 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE); 1814 goto f_err; 1815 } 1816 } 1817 } 1818 else 1819 { 1820 if (!(alg_a & SSL_aNULL) && !(alg_k & SSL_kPSK)) 1821 /* aNULL or kPSK do not need public keys */ 1822 { 1823 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1824 goto err; 1825 } 1826 /* still data left over */ 1827 if (n != 0) 1828 { 1829 al=SSL_AD_DECODE_ERROR; 1830 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE); 1831 goto f_err; 1832 } 1833 } 1834 EVP_PKEY_free(pkey); 1835 EVP_MD_CTX_cleanup(&md_ctx); 1836 return(1); 1837f_err: 1838 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1839err: 1840 EVP_PKEY_free(pkey); 1841#ifndef OPENSSL_NO_RSA 1842 if (rsa != NULL) 1843 RSA_free(rsa); 1844#endif 1845#ifndef OPENSSL_NO_DH 1846 if (dh != NULL) 1847 DH_free(dh); 1848#endif 1849#ifndef OPENSSL_NO_ECDH 1850 BN_CTX_free(bn_ctx); 1851 EC_POINT_free(srvr_ecpoint); 1852 if (ecdh != NULL) 1853 EC_KEY_free(ecdh); 1854#endif 1855 EVP_MD_CTX_cleanup(&md_ctx); 1856 return(-1); 1857 } 1858 1859int ssl3_get_certificate_request(SSL *s) 1860 { 1861 int ok,ret=0; 1862 unsigned long n,nc,l; 1863 unsigned int llen, ctype_num,i; 1864 X509_NAME *xn=NULL; 1865 const unsigned char *p,*q; 1866 unsigned char *d; 1867 STACK_OF(X509_NAME) *ca_sk=NULL; 1868 1869 n=s->method->ssl_get_message(s, 1870 SSL3_ST_CR_CERT_REQ_A, 1871 SSL3_ST_CR_CERT_REQ_B, 1872 -1, 1873 s->max_cert_list, 1874 &ok); 1875 1876 if (!ok) return((int)n); 1877 1878 s->s3->tmp.cert_req=0; 1879 1880 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE) 1881 { 1882 s->s3->tmp.reuse_message=1; 1883 /* If we get here we don't need any cached handshake records 1884 * as we wont be doing client auth. 1885 */ 1886 if (s->s3->handshake_buffer) 1887 { 1888 if (!ssl3_digest_cached_records(s)) 1889 goto err; 1890 } 1891 return(1); 1892 } 1893 1894 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST) 1895 { 1896 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 1897 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE); 1898 goto err; 1899 } 1900 1901 /* TLS does not like anon-DH with client cert */ 1902 if (s->version > SSL3_VERSION) 1903 { 1904 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) 1905 { 1906 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 1907 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER); 1908 goto err; 1909 } 1910 } 1911 1912 p=d=(unsigned char *)s->init_msg; 1913 1914 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL) 1915 { 1916 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE); 1917 goto err; 1918 } 1919 1920 /* get the certificate types */ 1921 ctype_num= *(p++); 1922 if (ctype_num > SSL3_CT_NUMBER) 1923 ctype_num=SSL3_CT_NUMBER; 1924 for (i=0; i<ctype_num; i++) 1925 s->s3->tmp.ctype[i]= p[i]; 1926 p+=ctype_num; 1927 if (TLS1_get_version(s) >= TLS1_2_VERSION) 1928 { 1929 n2s(p, llen); 1930 /* Check we have enough room for signature algorithms and 1931 * following length value. 1932 */ 1933 if ((unsigned long)(p - d + llen + 2) > n) 1934 { 1935 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1936 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_DATA_LENGTH_TOO_LONG); 1937 goto err; 1938 } 1939 if ((llen & 1) || !tls1_process_sigalgs(s, p, llen)) 1940 { 1941 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1942 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_SIGNATURE_ALGORITHMS_ERROR); 1943 goto err; 1944 } 1945 p += llen; 1946 } 1947 1948 /* get the CA RDNs */ 1949 n2s(p,llen); 1950#if 0 1951{ 1952FILE *out; 1953out=fopen("/tmp/vsign.der","w"); 1954fwrite(p,1,llen,out); 1955fclose(out); 1956} 1957#endif 1958 1959 if ((unsigned long)(p - d + llen) != n) 1960 { 1961 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1962 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH); 1963 goto err; 1964 } 1965 1966 for (nc=0; nc<llen; ) 1967 { 1968 n2s(p,l); 1969 if ((l+nc+2) > llen) 1970 { 1971 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG)) 1972 goto cont; /* netscape bugs */ 1973 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1974 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG); 1975 goto err; 1976 } 1977 1978 q=p; 1979 1980 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL) 1981 { 1982 /* If netscape tolerance is on, ignore errors */ 1983 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG) 1984 goto cont; 1985 else 1986 { 1987 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1988 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB); 1989 goto err; 1990 } 1991 } 1992 1993 if (q != (p+l)) 1994 { 1995 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1996 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH); 1997 goto err; 1998 } 1999 if (!sk_X509_NAME_push(ca_sk,xn)) 2000 { 2001 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE); 2002 goto err; 2003 } 2004 2005 p+=l; 2006 nc+=l+2; 2007 } 2008 2009 if (0) 2010 { 2011cont: 2012 ERR_clear_error(); 2013 } 2014 2015 /* we should setup a certificate to return.... */ 2016 s->s3->tmp.cert_req=1; 2017 s->s3->tmp.ctype_num=ctype_num; 2018 if (s->s3->tmp.ca_names != NULL) 2019 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free); 2020 s->s3->tmp.ca_names=ca_sk; 2021 ca_sk=NULL; 2022 2023 ret=1; 2024err: 2025 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free); 2026 return(ret); 2027 } 2028 2029static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b) 2030 { 2031 return(X509_NAME_cmp(*a,*b)); 2032 } 2033#ifndef OPENSSL_NO_TLSEXT 2034int ssl3_get_new_session_ticket(SSL *s) 2035 { 2036 int ok,al,ret=0, ticklen; 2037 long n; 2038 const unsigned char *p; 2039 unsigned char *d; 2040 2041 n=s->method->ssl_get_message(s, 2042 SSL3_ST_CR_SESSION_TICKET_A, 2043 SSL3_ST_CR_SESSION_TICKET_B, 2044 -1, 2045 16384, 2046 &ok); 2047 2048 if (!ok) 2049 return((int)n); 2050 2051 if (s->s3->tmp.message_type == SSL3_MT_FINISHED) 2052 { 2053 s->s3->tmp.reuse_message=1; 2054 return(1); 2055 } 2056 if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET) 2057 { 2058 al=SSL_AD_UNEXPECTED_MESSAGE; 2059 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_BAD_MESSAGE_TYPE); 2060 goto f_err; 2061 } 2062 if (n < 6) 2063 { 2064 /* need at least ticket_lifetime_hint + ticket length */ 2065 al = SSL_AD_DECODE_ERROR; 2066 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH); 2067 goto f_err; 2068 } 2069 2070 p=d=(unsigned char *)s->init_msg; 2071 n2l(p, s->session->tlsext_tick_lifetime_hint); 2072 n2s(p, ticklen); 2073 /* ticket_lifetime_hint + ticket_length + ticket */ 2074 if (ticklen + 6 != n) 2075 { 2076 al = SSL_AD_DECODE_ERROR; 2077 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH); 2078 goto f_err; 2079 } 2080 if (s->session->tlsext_tick) 2081 { 2082 OPENSSL_free(s->session->tlsext_tick); 2083 s->session->tlsext_ticklen = 0; 2084 } 2085 s->session->tlsext_tick = OPENSSL_malloc(ticklen); 2086 if (!s->session->tlsext_tick) 2087 { 2088 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE); 2089 goto err; 2090 } 2091 memcpy(s->session->tlsext_tick, p, ticklen); 2092 s->session->tlsext_ticklen = ticklen; 2093 /* There are two ways to detect a resumed ticket sesion. 2094 * One is to set an appropriate session ID and then the server 2095 * must return a match in ServerHello. This allows the normal 2096 * client session ID matching to work and we know much 2097 * earlier that the ticket has been accepted. 2098 * 2099 * The other way is to set zero length session ID when the 2100 * ticket is presented and rely on the handshake to determine 2101 * session resumption. 2102 * 2103 * We choose the former approach because this fits in with 2104 * assumptions elsewhere in OpenSSL. The session ID is set 2105 * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the 2106 * ticket. 2107 */ 2108 EVP_Digest(p, ticklen, 2109 s->session->session_id, &s->session->session_id_length, 2110#ifndef OPENSSL_NO_SHA256 2111 EVP_sha256(), NULL); 2112#else 2113 EVP_sha1(), NULL); 2114#endif 2115 ret=1; 2116 return(ret); 2117f_err: 2118 ssl3_send_alert(s,SSL3_AL_FATAL,al); 2119err: 2120 return(-1); 2121 } 2122 2123int ssl3_get_cert_status(SSL *s) 2124 { 2125 int ok, al; 2126 unsigned long resplen,n; 2127 const unsigned char *p; 2128 2129 n=s->method->ssl_get_message(s, 2130 SSL3_ST_CR_CERT_STATUS_A, 2131 SSL3_ST_CR_CERT_STATUS_B, 2132 SSL3_MT_CERTIFICATE_STATUS, 2133 16384, 2134 &ok); 2135 2136 if (!ok) return((int)n); 2137 if (n < 4) 2138 { 2139 /* need at least status type + length */ 2140 al = SSL_AD_DECODE_ERROR; 2141 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH); 2142 goto f_err; 2143 } 2144 p = (unsigned char *)s->init_msg; 2145 if (*p++ != TLSEXT_STATUSTYPE_ocsp) 2146 { 2147 al = SSL_AD_DECODE_ERROR; 2148 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_UNSUPPORTED_STATUS_TYPE); 2149 goto f_err; 2150 } 2151 n2l3(p, resplen); 2152 if (resplen + 4 != n) 2153 { 2154 al = SSL_AD_DECODE_ERROR; 2155 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH); 2156 goto f_err; 2157 } 2158 if (s->tlsext_ocsp_resp) 2159 OPENSSL_free(s->tlsext_ocsp_resp); 2160 s->tlsext_ocsp_resp = BUF_memdup(p, resplen); 2161 if (!s->tlsext_ocsp_resp) 2162 { 2163 al = SSL_AD_INTERNAL_ERROR; 2164 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE); 2165 goto f_err; 2166 } 2167 s->tlsext_ocsp_resplen = resplen; 2168 if (s->ctx->tlsext_status_cb) 2169 { 2170 int ret; 2171 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg); 2172 if (ret == 0) 2173 { 2174 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE; 2175 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_INVALID_STATUS_RESPONSE); 2176 goto f_err; 2177 } 2178 if (ret < 0) 2179 { 2180 al = SSL_AD_INTERNAL_ERROR; 2181 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE); 2182 goto f_err; 2183 } 2184 } 2185 return 1; 2186f_err: 2187 ssl3_send_alert(s,SSL3_AL_FATAL,al); 2188 return(-1); 2189 } 2190#endif 2191 2192int ssl3_get_server_done(SSL *s) 2193 { 2194 int ok,ret=0; 2195 long n; 2196 2197 n=s->method->ssl_get_message(s, 2198 SSL3_ST_CR_SRVR_DONE_A, 2199 SSL3_ST_CR_SRVR_DONE_B, 2200 SSL3_MT_SERVER_DONE, 2201 30, /* should be very small, like 0 :-) */ 2202 &ok); 2203 2204 if (!ok) return((int)n); 2205 if (n > 0) 2206 { 2207 /* should contain no data */ 2208 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 2209 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH); 2210 return -1; 2211 } 2212 ret=1; 2213 return(ret); 2214 } 2215 2216 2217int ssl3_send_client_key_exchange(SSL *s) 2218 { 2219 unsigned char *p,*d; 2220 int n; 2221 unsigned long alg_k; 2222#ifndef OPENSSL_NO_RSA 2223 unsigned char *q; 2224 EVP_PKEY *pkey=NULL; 2225#endif 2226#ifndef OPENSSL_NO_KRB5 2227 KSSL_ERR kssl_err; 2228#endif /* OPENSSL_NO_KRB5 */ 2229#ifndef OPENSSL_NO_ECDH 2230 EC_KEY *clnt_ecdh = NULL; 2231 const EC_POINT *srvr_ecpoint = NULL; 2232 EVP_PKEY *srvr_pub_pkey = NULL; 2233 unsigned char *encodedPoint = NULL; 2234 int encoded_pt_len = 0; 2235 BN_CTX * bn_ctx = NULL; 2236#endif 2237 2238 if (s->state == SSL3_ST_CW_KEY_EXCH_A) 2239 { 2240 d=(unsigned char *)s->init_buf->data; 2241 p= &(d[4]); 2242 2243 alg_k=s->s3->tmp.new_cipher->algorithm_mkey; 2244 2245 /* Fool emacs indentation */ 2246 if (0) {} 2247#ifndef OPENSSL_NO_RSA 2248 else if (alg_k & SSL_kRSA) 2249 { 2250 RSA *rsa; 2251 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; 2252 2253 if (s->session->sess_cert->peer_rsa_tmp != NULL) 2254 rsa=s->session->sess_cert->peer_rsa_tmp; 2255 else 2256 { 2257 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 2258 if ((pkey == NULL) || 2259 (pkey->type != EVP_PKEY_RSA) || 2260 (pkey->pkey.rsa == NULL)) 2261 { 2262 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 2263 goto err; 2264 } 2265 rsa=pkey->pkey.rsa; 2266 EVP_PKEY_free(pkey); 2267 } 2268 2269 tmp_buf[0]=s->client_version>>8; 2270 tmp_buf[1]=s->client_version&0xff; 2271 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0) 2272 goto err; 2273 2274 s->session->master_key_length=sizeof tmp_buf; 2275 2276 q=p; 2277 /* Fix buf for TLS and beyond */ 2278 if (s->version > SSL3_VERSION) 2279 p+=2; 2280 n=RSA_public_encrypt(sizeof tmp_buf, 2281 tmp_buf,p,rsa,RSA_PKCS1_PADDING); 2282#ifdef PKCS1_CHECK 2283 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++; 2284 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70; 2285#endif 2286 if (n <= 0) 2287 { 2288 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT); 2289 goto err; 2290 } 2291 2292 /* Fix buf for TLS and beyond */ 2293 if (s->version > SSL3_VERSION) 2294 { 2295 s2n(n,q); 2296 n+=2; 2297 } 2298 2299 s->session->master_key_length= 2300 s->method->ssl3_enc->generate_master_secret(s, 2301 s->session->master_key, 2302 tmp_buf,sizeof tmp_buf); 2303 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf); 2304 } 2305#endif 2306#ifndef OPENSSL_NO_KRB5 2307 else if (alg_k & SSL_kKRB5) 2308 { 2309 krb5_error_code krb5rc; 2310 KSSL_CTX *kssl_ctx = s->kssl_ctx; 2311 /* krb5_data krb5_ap_req; */ 2312 krb5_data *enc_ticket; 2313 krb5_data authenticator, *authp = NULL; 2314 EVP_CIPHER_CTX ciph_ctx; 2315 const EVP_CIPHER *enc = NULL; 2316 unsigned char iv[EVP_MAX_IV_LENGTH]; 2317 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; 2318 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH 2319 + EVP_MAX_IV_LENGTH]; 2320 int padl, outl = sizeof(epms); 2321 2322 EVP_CIPHER_CTX_init(&ciph_ctx); 2323 2324#ifdef KSSL_DEBUG 2325 printf("ssl3_send_client_key_exchange(%lx & %lx)\n", 2326 alg_k, SSL_kKRB5); 2327#endif /* KSSL_DEBUG */ 2328 2329 authp = NULL; 2330#ifdef KRB5SENDAUTH 2331 if (KRB5SENDAUTH) authp = &authenticator; 2332#endif /* KRB5SENDAUTH */ 2333 2334 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp, 2335 &kssl_err); 2336 enc = kssl_map_enc(kssl_ctx->enctype); 2337 if (enc == NULL) 2338 goto err; 2339#ifdef KSSL_DEBUG 2340 { 2341 printf("kssl_cget_tkt rtn %d\n", krb5rc); 2342 if (krb5rc && kssl_err.text) 2343 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text); 2344 } 2345#endif /* KSSL_DEBUG */ 2346 2347 if (krb5rc) 2348 { 2349 ssl3_send_alert(s,SSL3_AL_FATAL, 2350 SSL_AD_HANDSHAKE_FAILURE); 2351 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2352 kssl_err.reason); 2353 goto err; 2354 } 2355 2356 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ 2357 ** in place of RFC 2712 KerberosWrapper, as in: 2358 ** 2359 ** Send ticket (copy to *p, set n = length) 2360 ** n = krb5_ap_req.length; 2361 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length); 2362 ** if (krb5_ap_req.data) 2363 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req); 2364 ** 2365 ** Now using real RFC 2712 KerberosWrapper 2366 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>) 2367 ** Note: 2712 "opaque" types are here replaced 2368 ** with a 2-byte length followed by the value. 2369 ** Example: 2370 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms 2371 ** Where "xx xx" = length bytes. Shown here with 2372 ** optional authenticator omitted. 2373 */ 2374 2375 /* KerberosWrapper.Ticket */ 2376 s2n(enc_ticket->length,p); 2377 memcpy(p, enc_ticket->data, enc_ticket->length); 2378 p+= enc_ticket->length; 2379 n = enc_ticket->length + 2; 2380 2381 /* KerberosWrapper.Authenticator */ 2382 if (authp && authp->length) 2383 { 2384 s2n(authp->length,p); 2385 memcpy(p, authp->data, authp->length); 2386 p+= authp->length; 2387 n+= authp->length + 2; 2388 2389 free(authp->data); 2390 authp->data = NULL; 2391 authp->length = 0; 2392 } 2393 else 2394 { 2395 s2n(0,p);/* null authenticator length */ 2396 n+=2; 2397 } 2398 2399 tmp_buf[0]=s->client_version>>8; 2400 tmp_buf[1]=s->client_version&0xff; 2401 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0) 2402 goto err; 2403 2404 /* 20010420 VRS. Tried it this way; failed. 2405 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL); 2406 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx, 2407 ** kssl_ctx->length); 2408 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv); 2409 */ 2410 2411 memset(iv, 0, sizeof iv); /* per RFC 1510 */ 2412 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL, 2413 kssl_ctx->key,iv); 2414 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf, 2415 sizeof tmp_buf); 2416 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl); 2417 outl += padl; 2418 if (outl > (int)sizeof epms) 2419 { 2420 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); 2421 goto err; 2422 } 2423 EVP_CIPHER_CTX_cleanup(&ciph_ctx); 2424 2425 /* KerberosWrapper.EncryptedPreMasterSecret */ 2426 s2n(outl,p); 2427 memcpy(p, epms, outl); 2428 p+=outl; 2429 n+=outl + 2; 2430 2431 s->session->master_key_length= 2432 s->method->ssl3_enc->generate_master_secret(s, 2433 s->session->master_key, 2434 tmp_buf, sizeof tmp_buf); 2435 2436 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf); 2437 OPENSSL_cleanse(epms, outl); 2438 } 2439#endif 2440#ifndef OPENSSL_NO_DH 2441 else if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) 2442 { 2443 DH *dh_srvr,*dh_clnt; 2444 2445 if (s->session->sess_cert == NULL) 2446 { 2447 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 2448 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE); 2449 goto err; 2450 } 2451 2452 if (s->session->sess_cert->peer_dh_tmp != NULL) 2453 dh_srvr=s->session->sess_cert->peer_dh_tmp; 2454 else 2455 { 2456 /* we get them from the cert */ 2457 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); 2458 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS); 2459 goto err; 2460 } 2461 2462 /* generate a new random key */ 2463 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL) 2464 { 2465 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 2466 goto err; 2467 } 2468 if (!DH_generate_key(dh_clnt)) 2469 { 2470 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 2471 DH_free(dh_clnt); 2472 goto err; 2473 } 2474 2475 /* use the 'p' output buffer for the DH key, but 2476 * make sure to clear it out afterwards */ 2477 2478 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt); 2479 2480 if (n <= 0) 2481 { 2482 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 2483 DH_free(dh_clnt); 2484 goto err; 2485 } 2486 2487 /* generate master key from the result */ 2488 s->session->master_key_length= 2489 s->method->ssl3_enc->generate_master_secret(s, 2490 s->session->master_key,p,n); 2491 /* clean up */ 2492 memset(p,0,n); 2493 2494 /* send off the data */ 2495 n=BN_num_bytes(dh_clnt->pub_key); 2496 s2n(n,p); 2497 BN_bn2bin(dh_clnt->pub_key,p); 2498 n+=2; 2499 2500 DH_free(dh_clnt); 2501 2502 /* perhaps clean things up a bit EAY EAY EAY EAY*/ 2503 } 2504#endif 2505 2506#ifndef OPENSSL_NO_ECDH 2507 else if (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)) 2508 { 2509 const EC_GROUP *srvr_group = NULL; 2510 EC_KEY *tkey; 2511 int ecdh_clnt_cert = 0; 2512 int field_size = 0; 2513 2514 /* Did we send out the client's 2515 * ECDH share for use in premaster 2516 * computation as part of client certificate? 2517 * If so, set ecdh_clnt_cert to 1. 2518 */ 2519 if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL)) 2520 { 2521 /* XXX: For now, we do not support client 2522 * authentication using ECDH certificates. 2523 * To add such support, one needs to add 2524 * code that checks for appropriate 2525 * conditions and sets ecdh_clnt_cert to 1. 2526 * For example, the cert have an ECC 2527 * key on the same curve as the server's 2528 * and the key should be authorized for 2529 * key agreement. 2530 * 2531 * One also needs to add code in ssl3_connect 2532 * to skip sending the certificate verify 2533 * message. 2534 * 2535 * if ((s->cert->key->privatekey != NULL) && 2536 * (s->cert->key->privatekey->type == 2537 * EVP_PKEY_EC) && ...) 2538 * ecdh_clnt_cert = 1; 2539 */ 2540 } 2541 2542 if (s->session->sess_cert->peer_ecdh_tmp != NULL) 2543 { 2544 tkey = s->session->sess_cert->peer_ecdh_tmp; 2545 } 2546 else 2547 { 2548 /* Get the Server Public Key from Cert */ 2549 srvr_pub_pkey = X509_get_pubkey(s->session-> \ 2550 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509); 2551 if ((srvr_pub_pkey == NULL) || 2552 (srvr_pub_pkey->type != EVP_PKEY_EC) || 2553 (srvr_pub_pkey->pkey.ec == NULL)) 2554 { 2555 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2556 ERR_R_INTERNAL_ERROR); 2557 goto err; 2558 } 2559 2560 tkey = srvr_pub_pkey->pkey.ec; 2561 } 2562 2563 srvr_group = EC_KEY_get0_group(tkey); 2564 srvr_ecpoint = EC_KEY_get0_public_key(tkey); 2565 2566 if ((srvr_group == NULL) || (srvr_ecpoint == NULL)) 2567 { 2568 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2569 ERR_R_INTERNAL_ERROR); 2570 goto err; 2571 } 2572 2573 if ((clnt_ecdh=EC_KEY_new()) == NULL) 2574 { 2575 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2576 goto err; 2577 } 2578 2579 if (!EC_KEY_set_group(clnt_ecdh, srvr_group)) 2580 { 2581 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB); 2582 goto err; 2583 } 2584 if (ecdh_clnt_cert) 2585 { 2586 /* Reuse key info from our certificate 2587 * We only need our private key to perform 2588 * the ECDH computation. 2589 */ 2590 const BIGNUM *priv_key; 2591 tkey = s->cert->key->privatekey->pkey.ec; 2592 priv_key = EC_KEY_get0_private_key(tkey); 2593 if (priv_key == NULL) 2594 { 2595 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2596 goto err; 2597 } 2598 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key)) 2599 { 2600 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB); 2601 goto err; 2602 } 2603 } 2604 else 2605 { 2606 /* Generate a new ECDH key pair */ 2607 if (!(EC_KEY_generate_key(clnt_ecdh))) 2608 { 2609 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB); 2610 goto err; 2611 } 2612 } 2613 2614 /* use the 'p' output buffer for the ECDH key, but 2615 * make sure to clear it out afterwards 2616 */ 2617 2618 field_size = EC_GROUP_get_degree(srvr_group); 2619 if (field_size <= 0) 2620 { 2621 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2622 ERR_R_ECDH_LIB); 2623 goto err; 2624 } 2625 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL); 2626 if (n <= 0) 2627 { 2628 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2629 ERR_R_ECDH_LIB); 2630 goto err; 2631 } 2632 2633 /* generate master key from the result */ 2634 s->session->master_key_length = s->method->ssl3_enc \ 2635 -> generate_master_secret(s, 2636 s->session->master_key, 2637 p, n); 2638 2639 memset(p, 0, n); /* clean up */ 2640 2641 if (ecdh_clnt_cert) 2642 { 2643 /* Send empty client key exch message */ 2644 n = 0; 2645 } 2646 else 2647 { 2648 /* First check the size of encoding and 2649 * allocate memory accordingly. 2650 */ 2651 encoded_pt_len = 2652 EC_POINT_point2oct(srvr_group, 2653 EC_KEY_get0_public_key(clnt_ecdh), 2654 POINT_CONVERSION_UNCOMPRESSED, 2655 NULL, 0, NULL); 2656 2657 encodedPoint = (unsigned char *) 2658 OPENSSL_malloc(encoded_pt_len * 2659 sizeof(unsigned char)); 2660 bn_ctx = BN_CTX_new(); 2661 if ((encodedPoint == NULL) || 2662 (bn_ctx == NULL)) 2663 { 2664 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2665 goto err; 2666 } 2667 2668 /* Encode the public key */ 2669 n = EC_POINT_point2oct(srvr_group, 2670 EC_KEY_get0_public_key(clnt_ecdh), 2671 POINT_CONVERSION_UNCOMPRESSED, 2672 encodedPoint, encoded_pt_len, bn_ctx); 2673 2674 *p = n; /* length of encoded point */ 2675 /* Encoded point will be copied here */ 2676 p += 1; 2677 /* copy the point */ 2678 memcpy((unsigned char *)p, encodedPoint, n); 2679 /* increment n to account for length field */ 2680 n += 1; 2681 } 2682 2683 /* Free allocated memory */ 2684 BN_CTX_free(bn_ctx); 2685 if (encodedPoint != NULL) OPENSSL_free(encodedPoint); 2686 if (clnt_ecdh != NULL) 2687 EC_KEY_free(clnt_ecdh); 2688 EVP_PKEY_free(srvr_pub_pkey); 2689 } 2690#endif /* !OPENSSL_NO_ECDH */ 2691 else if (alg_k & SSL_kGOST) 2692 { 2693 /* GOST key exchange message creation */ 2694 EVP_PKEY_CTX *pkey_ctx; 2695 X509 *peer_cert; 2696 size_t msglen; 2697 unsigned int md_len; 2698 int keytype; 2699 unsigned char premaster_secret[32],shared_ukm[32], tmp[256]; 2700 EVP_MD_CTX *ukm_hash; 2701 EVP_PKEY *pub_key; 2702 2703 /* Get server sertificate PKEY and create ctx from it */ 2704 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST01)].x509; 2705 if (!peer_cert) 2706 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST94)].x509; 2707 if (!peer_cert) { 2708 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER); 2709 goto err; 2710 } 2711 2712 pkey_ctx=EVP_PKEY_CTX_new(pub_key=X509_get_pubkey(peer_cert),NULL); 2713 /* If we have send a certificate, and certificate key 2714 2715 * parameters match those of server certificate, use 2716 * certificate key for key exchange 2717 */ 2718 2719 /* Otherwise, generate ephemeral key pair */ 2720 2721 EVP_PKEY_encrypt_init(pkey_ctx); 2722 /* Generate session key */ 2723 RAND_bytes(premaster_secret,32); 2724 /* If we have client certificate, use its secret as peer key */ 2725 if (s->s3->tmp.cert_req && s->cert->key->privatekey) { 2726 if (EVP_PKEY_derive_set_peer(pkey_ctx,s->cert->key->privatekey) <=0) { 2727 /* If there was an error - just ignore it. Ephemeral key 2728 * would be used 2729 */ 2730 ERR_clear_error(); 2731 } 2732 } 2733 /* Compute shared IV and store it in algorithm-specific 2734 * context data */ 2735 ukm_hash = EVP_MD_CTX_create(); 2736 EVP_DigestInit(ukm_hash,EVP_get_digestbynid(NID_id_GostR3411_94)); 2737 EVP_DigestUpdate(ukm_hash,s->s3->client_random,SSL3_RANDOM_SIZE); 2738 EVP_DigestUpdate(ukm_hash,s->s3->server_random,SSL3_RANDOM_SIZE); 2739 EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len); 2740 EVP_MD_CTX_destroy(ukm_hash); 2741 if (EVP_PKEY_CTX_ctrl(pkey_ctx,-1,EVP_PKEY_OP_ENCRYPT,EVP_PKEY_CTRL_SET_IV, 2742 8,shared_ukm)<0) { 2743 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2744 SSL_R_LIBRARY_BUG); 2745 goto err; 2746 } 2747 /* Make GOST keytransport blob message */ 2748 /*Encapsulate it into sequence */ 2749 *(p++)=V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED; 2750 msglen=255; 2751 if (EVP_PKEY_encrypt(pkey_ctx,tmp,&msglen,premaster_secret,32)<0) { 2752 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2753 SSL_R_LIBRARY_BUG); 2754 goto err; 2755 } 2756 if (msglen >= 0x80) 2757 { 2758 *(p++)=0x81; 2759 *(p++)= msglen & 0xff; 2760 n=msglen+3; 2761 } 2762 else 2763 { 2764 *(p++)= msglen & 0xff; 2765 n=msglen+2; 2766 } 2767 memcpy(p, tmp, msglen); 2768 /* Check if pubkey from client certificate was used */ 2769 if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0) 2770 { 2771 /* Set flag "skip certificate verify" */ 2772 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY; 2773 } 2774 EVP_PKEY_CTX_free(pkey_ctx); 2775 s->session->master_key_length= 2776 s->method->ssl3_enc->generate_master_secret(s, 2777 s->session->master_key,premaster_secret,32); 2778 EVP_PKEY_free(pub_key); 2779 2780 } 2781#ifndef OPENSSL_NO_SRP 2782 else if (alg_k & SSL_kSRP) 2783 { 2784 if (s->srp_ctx.A != NULL) 2785 { 2786 /* send off the data */ 2787 n=BN_num_bytes(s->srp_ctx.A); 2788 s2n(n,p); 2789 BN_bn2bin(s->srp_ctx.A,p); 2790 n+=2; 2791 } 2792 else 2793 { 2794 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 2795 goto err; 2796 } 2797 if (s->session->srp_username != NULL) 2798 OPENSSL_free(s->session->srp_username); 2799 s->session->srp_username = BUF_strdup(s->srp_ctx.login); 2800 if (s->session->srp_username == NULL) 2801 { 2802 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2803 ERR_R_MALLOC_FAILURE); 2804 goto err; 2805 } 2806 2807 if ((s->session->master_key_length = SRP_generate_client_master_secret(s,s->session->master_key))<0) 2808 { 2809 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 2810 goto err; 2811 } 2812 } 2813#endif 2814#ifndef OPENSSL_NO_PSK 2815 else if (alg_k & SSL_kPSK) 2816 { 2817 char identity[PSK_MAX_IDENTITY_LEN]; 2818 unsigned char *t = NULL; 2819 unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4]; 2820 unsigned int pre_ms_len = 0, psk_len = 0; 2821 int psk_err = 1; 2822 2823 n = 0; 2824 if (s->psk_client_callback == NULL) 2825 { 2826 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2827 SSL_R_PSK_NO_CLIENT_CB); 2828 goto err; 2829 } 2830 2831 psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint, 2832 identity, PSK_MAX_IDENTITY_LEN, 2833 psk_or_pre_ms, sizeof(psk_or_pre_ms)); 2834 if (psk_len > PSK_MAX_PSK_LEN) 2835 { 2836 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2837 ERR_R_INTERNAL_ERROR); 2838 goto psk_err; 2839 } 2840 else if (psk_len == 0) 2841 { 2842 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2843 SSL_R_PSK_IDENTITY_NOT_FOUND); 2844 goto psk_err; 2845 } 2846 2847 /* create PSK pre_master_secret */ 2848 pre_ms_len = 2+psk_len+2+psk_len; 2849 t = psk_or_pre_ms; 2850 memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len); 2851 s2n(psk_len, t); 2852 memset(t, 0, psk_len); 2853 t+=psk_len; 2854 s2n(psk_len, t); 2855 2856 if (s->session->psk_identity_hint != NULL) 2857 OPENSSL_free(s->session->psk_identity_hint); 2858 s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint); 2859 if (s->ctx->psk_identity_hint != NULL && 2860 s->session->psk_identity_hint == NULL) 2861 { 2862 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2863 ERR_R_MALLOC_FAILURE); 2864 goto psk_err; 2865 } 2866 2867 if (s->session->psk_identity != NULL) 2868 OPENSSL_free(s->session->psk_identity); 2869 s->session->psk_identity = BUF_strdup(identity); 2870 if (s->session->psk_identity == NULL) 2871 { 2872 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2873 ERR_R_MALLOC_FAILURE); 2874 goto psk_err; 2875 } 2876 2877 s->session->master_key_length = 2878 s->method->ssl3_enc->generate_master_secret(s, 2879 s->session->master_key, 2880 psk_or_pre_ms, pre_ms_len); 2881 n = strlen(identity); 2882 s2n(n, p); 2883 memcpy(p, identity, n); 2884 n+=2; 2885 psk_err = 0; 2886 psk_err: 2887 OPENSSL_cleanse(identity, PSK_MAX_IDENTITY_LEN); 2888 OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms)); 2889 if (psk_err != 0) 2890 { 2891 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); 2892 goto err; 2893 } 2894 } 2895#endif 2896 else 2897 { 2898 ssl3_send_alert(s, SSL3_AL_FATAL, 2899 SSL_AD_HANDSHAKE_FAILURE); 2900 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2901 ERR_R_INTERNAL_ERROR); 2902 goto err; 2903 } 2904 2905 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE; 2906 l2n3(n,d); 2907 2908 s->state=SSL3_ST_CW_KEY_EXCH_B; 2909 /* number of bytes to write */ 2910 s->init_num=n+4; 2911 s->init_off=0; 2912 } 2913 2914 /* SSL3_ST_CW_KEY_EXCH_B */ 2915 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 2916err: 2917#ifndef OPENSSL_NO_ECDH 2918 BN_CTX_free(bn_ctx); 2919 if (encodedPoint != NULL) OPENSSL_free(encodedPoint); 2920 if (clnt_ecdh != NULL) 2921 EC_KEY_free(clnt_ecdh); 2922 EVP_PKEY_free(srvr_pub_pkey); 2923#endif 2924 return(-1); 2925 } 2926 2927int ssl3_send_client_verify(SSL *s) 2928 { 2929 unsigned char *p,*d; 2930 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH]; 2931 EVP_PKEY *pkey; 2932 EVP_PKEY_CTX *pctx=NULL; 2933 EVP_MD_CTX mctx; 2934 unsigned u=0; 2935 unsigned long n; 2936 int j; 2937 2938 EVP_MD_CTX_init(&mctx); 2939 2940 if (s->state == SSL3_ST_CW_CERT_VRFY_A) 2941 { 2942 d=(unsigned char *)s->init_buf->data; 2943 p= &(d[4]); 2944 pkey=s->cert->key->privatekey; 2945/* Create context from key and test if sha1 is allowed as digest */ 2946 pctx = EVP_PKEY_CTX_new(pkey,NULL); 2947 EVP_PKEY_sign_init(pctx); 2948 if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1())>0) 2949 { 2950 if (TLS1_get_version(s) < TLS1_2_VERSION) 2951 s->method->ssl3_enc->cert_verify_mac(s, 2952 NID_sha1, 2953 &(data[MD5_DIGEST_LENGTH])); 2954 } 2955 else 2956 { 2957 ERR_clear_error(); 2958 } 2959 /* For TLS v1.2 send signature algorithm and signature 2960 * using agreed digest and cached handshake records. 2961 */ 2962 if (TLS1_get_version(s) >= TLS1_2_VERSION) 2963 { 2964 long hdatalen = 0; 2965 void *hdata; 2966 const EVP_MD *md = s->cert->key->digest; 2967 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, 2968 &hdata); 2969 if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md)) 2970 { 2971 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, 2972 ERR_R_INTERNAL_ERROR); 2973 goto err; 2974 } 2975 p += 2; 2976#ifdef SSL_DEBUG 2977 fprintf(stderr, "Using TLS 1.2 with client alg %s\n", 2978 EVP_MD_name(md)); 2979#endif 2980 if (!EVP_SignInit_ex(&mctx, md, NULL) 2981 || !EVP_SignUpdate(&mctx, hdata, hdatalen) 2982 || !EVP_SignFinal(&mctx, p + 2, &u, pkey)) 2983 { 2984 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, 2985 ERR_R_EVP_LIB); 2986 goto err; 2987 } 2988 s2n(u,p); 2989 n = u + 4; 2990 if (!ssl3_digest_cached_records(s)) 2991 goto err; 2992 } 2993 else 2994#ifndef OPENSSL_NO_RSA 2995 if (pkey->type == EVP_PKEY_RSA) 2996 { 2997 s->method->ssl3_enc->cert_verify_mac(s, 2998 NID_md5, 2999 &(data[0])); 3000 if (RSA_sign(NID_md5_sha1, data, 3001 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH, 3002 &(p[2]), &u, pkey->pkey.rsa) <= 0 ) 3003 { 3004 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB); 3005 goto err; 3006 } 3007 s2n(u,p); 3008 n=u+2; 3009 } 3010 else 3011#endif 3012#ifndef OPENSSL_NO_DSA 3013 if (pkey->type == EVP_PKEY_DSA) 3014 { 3015 if (!DSA_sign(pkey->save_type, 3016 &(data[MD5_DIGEST_LENGTH]), 3017 SHA_DIGEST_LENGTH,&(p[2]), 3018 (unsigned int *)&j,pkey->pkey.dsa)) 3019 { 3020 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB); 3021 goto err; 3022 } 3023 s2n(j,p); 3024 n=j+2; 3025 } 3026 else 3027#endif 3028#ifndef OPENSSL_NO_ECDSA 3029 if (pkey->type == EVP_PKEY_EC) 3030 { 3031 if (!ECDSA_sign(pkey->save_type, 3032 &(data[MD5_DIGEST_LENGTH]), 3033 SHA_DIGEST_LENGTH,&(p[2]), 3034 (unsigned int *)&j,pkey->pkey.ec)) 3035 { 3036 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, 3037 ERR_R_ECDSA_LIB); 3038 goto err; 3039 } 3040 s2n(j,p); 3041 n=j+2; 3042 } 3043 else 3044#endif 3045 if (pkey->type == NID_id_GostR3410_94 || pkey->type == NID_id_GostR3410_2001) 3046 { 3047 unsigned char signbuf[64]; 3048 int i; 3049 size_t sigsize=64; 3050 s->method->ssl3_enc->cert_verify_mac(s, 3051 NID_id_GostR3411_94, 3052 data); 3053 if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) { 3054 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, 3055 ERR_R_INTERNAL_ERROR); 3056 goto err; 3057 } 3058 for (i=63,j=0; i>=0; j++, i--) { 3059 p[2+j]=signbuf[i]; 3060 } 3061 s2n(j,p); 3062 n=j+2; 3063 } 3064 else 3065 { 3066 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR); 3067 goto err; 3068 } 3069 *(d++)=SSL3_MT_CERTIFICATE_VERIFY; 3070 l2n3(n,d); 3071 3072 s->state=SSL3_ST_CW_CERT_VRFY_B; 3073 s->init_num=(int)n+4; 3074 s->init_off=0; 3075 } 3076 EVP_MD_CTX_cleanup(&mctx); 3077 EVP_PKEY_CTX_free(pctx); 3078 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 3079err: 3080 EVP_MD_CTX_cleanup(&mctx); 3081 EVP_PKEY_CTX_free(pctx); 3082 return(-1); 3083 } 3084 3085int ssl3_send_client_certificate(SSL *s) 3086 { 3087 X509 *x509=NULL; 3088 EVP_PKEY *pkey=NULL; 3089 int i; 3090 unsigned long l; 3091 3092 if (s->state == SSL3_ST_CW_CERT_A) 3093 { 3094 if ((s->cert == NULL) || 3095 (s->cert->key->x509 == NULL) || 3096 (s->cert->key->privatekey == NULL)) 3097 s->state=SSL3_ST_CW_CERT_B; 3098 else 3099 s->state=SSL3_ST_CW_CERT_C; 3100 } 3101 3102 /* We need to get a client cert */ 3103 if (s->state == SSL3_ST_CW_CERT_B) 3104 { 3105 /* If we get an error, we need to 3106 * ssl->rwstate=SSL_X509_LOOKUP; return(-1); 3107 * We then get retied later */ 3108 i=0; 3109 i = ssl_do_client_cert_cb(s, &x509, &pkey); 3110 if (i < 0) 3111 { 3112 s->rwstate=SSL_X509_LOOKUP; 3113 return(-1); 3114 } 3115 s->rwstate=SSL_NOTHING; 3116 if ((i == 1) && (pkey != NULL) && (x509 != NULL)) 3117 { 3118 s->state=SSL3_ST_CW_CERT_B; 3119 if ( !SSL_use_certificate(s,x509) || 3120 !SSL_use_PrivateKey(s,pkey)) 3121 i=0; 3122 } 3123 else if (i == 1) 3124 { 3125 i=0; 3126 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); 3127 } 3128 3129 if (x509 != NULL) X509_free(x509); 3130 if (pkey != NULL) EVP_PKEY_free(pkey); 3131 if (i == 0) 3132 { 3133 if (s->version == SSL3_VERSION) 3134 { 3135 s->s3->tmp.cert_req=0; 3136 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE); 3137 return(1); 3138 } 3139 else 3140 { 3141 s->s3->tmp.cert_req=2; 3142 } 3143 } 3144 3145 /* Ok, we have a cert */ 3146 s->state=SSL3_ST_CW_CERT_C; 3147 } 3148 3149 if (s->state == SSL3_ST_CW_CERT_C) 3150 { 3151 s->state=SSL3_ST_CW_CERT_D; 3152 l=ssl3_output_cert_chain(s, 3153 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509); 3154 s->init_num=(int)l; 3155 s->init_off=0; 3156 } 3157 /* SSL3_ST_CW_CERT_D */ 3158 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 3159 } 3160 3161#define has_bits(i,m) (((i)&(m)) == (m)) 3162 3163int ssl3_check_cert_and_algorithm(SSL *s) 3164 { 3165 int i,idx; 3166 long alg_k,alg_a; 3167 EVP_PKEY *pkey=NULL; 3168 SESS_CERT *sc; 3169#ifndef OPENSSL_NO_RSA 3170 RSA *rsa; 3171#endif 3172#ifndef OPENSSL_NO_DH 3173 DH *dh; 3174#endif 3175 3176 alg_k=s->s3->tmp.new_cipher->algorithm_mkey; 3177 alg_a=s->s3->tmp.new_cipher->algorithm_auth; 3178 3179 /* we don't have a certificate */ 3180 if ((alg_a & (SSL_aDH|SSL_aNULL|SSL_aKRB5)) || (alg_k & SSL_kPSK)) 3181 return(1); 3182 3183 sc=s->session->sess_cert; 3184 if (sc == NULL) 3185 { 3186 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR); 3187 goto err; 3188 } 3189 3190#ifndef OPENSSL_NO_RSA 3191 rsa=s->session->sess_cert->peer_rsa_tmp; 3192#endif 3193#ifndef OPENSSL_NO_DH 3194 dh=s->session->sess_cert->peer_dh_tmp; 3195#endif 3196 3197 /* This is the passed certificate */ 3198 3199 idx=sc->peer_cert_type; 3200#ifndef OPENSSL_NO_ECDH 3201 if (idx == SSL_PKEY_ECC) 3202 { 3203 if (ssl_check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509, 3204 s) == 0) 3205 { /* check failed */ 3206 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT); 3207 goto f_err; 3208 } 3209 else 3210 { 3211 return 1; 3212 } 3213 } 3214#endif 3215 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509); 3216 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey); 3217 EVP_PKEY_free(pkey); 3218 3219 3220 /* Check that we have a certificate if we require one */ 3221 if ((alg_a & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN)) 3222 { 3223 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT); 3224 goto f_err; 3225 } 3226#ifndef OPENSSL_NO_DSA 3227 else if ((alg_a & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN)) 3228 { 3229 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT); 3230 goto f_err; 3231 } 3232#endif 3233#ifndef OPENSSL_NO_RSA 3234 if ((alg_k & SSL_kRSA) && 3235 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL))) 3236 { 3237 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT); 3238 goto f_err; 3239 } 3240#endif 3241#ifndef OPENSSL_NO_DH 3242 if ((alg_k & SSL_kEDH) && 3243 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL))) 3244 { 3245 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY); 3246 goto f_err; 3247 } 3248 else if ((alg_k & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA)) 3249 { 3250 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT); 3251 goto f_err; 3252 } 3253#ifndef OPENSSL_NO_DSA 3254 else if ((alg_k & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA)) 3255 { 3256 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT); 3257 goto f_err; 3258 } 3259#endif 3260#endif 3261 3262 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP)) 3263 { 3264#ifndef OPENSSL_NO_RSA 3265 if (alg_k & SSL_kRSA) 3266 { 3267 if (rsa == NULL 3268 || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) 3269 { 3270 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY); 3271 goto f_err; 3272 } 3273 } 3274 else 3275#endif 3276#ifndef OPENSSL_NO_DH 3277 if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) 3278 { 3279 if (dh == NULL 3280 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) 3281 { 3282 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY); 3283 goto f_err; 3284 } 3285 } 3286 else 3287#endif 3288 { 3289 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE); 3290 goto f_err; 3291 } 3292 } 3293 return(1); 3294f_err: 3295 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); 3296err: 3297 return(0); 3298 } 3299 3300#if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG) 3301int ssl3_send_next_proto(SSL *s) 3302 { 3303 unsigned int len, padding_len; 3304 unsigned char *d; 3305 3306 if (s->state == SSL3_ST_CW_NEXT_PROTO_A) 3307 { 3308 len = s->next_proto_negotiated_len; 3309 padding_len = 32 - ((len + 2) % 32); 3310 d = (unsigned char *)s->init_buf->data; 3311 d[4] = len; 3312 memcpy(d + 5, s->next_proto_negotiated, len); 3313 d[5 + len] = padding_len; 3314 memset(d + 6 + len, 0, padding_len); 3315 *(d++)=SSL3_MT_NEXT_PROTO; 3316 l2n3(2 + len + padding_len, d); 3317 s->state = SSL3_ST_CW_NEXT_PROTO_B; 3318 s->init_num = 4 + 2 + len + padding_len; 3319 s->init_off = 0; 3320 } 3321 3322 return ssl3_do_write(s, SSL3_RT_HANDSHAKE); 3323} 3324#endif /* !OPENSSL_NO_TLSEXT && !OPENSSL_NO_NEXTPROTONEG */ 3325 3326/* Check to see if handshake is full or resumed. Usually this is just a 3327 * case of checking to see if a cache hit has occurred. In the case of 3328 * session tickets we have to check the next message to be sure. 3329 */ 3330 3331#ifndef OPENSSL_NO_TLSEXT 3332int ssl3_check_finished(SSL *s) 3333 { 3334 int ok; 3335 long n; 3336 /* If we have no ticket it cannot be a resumed session. */ 3337 if (!s->session->tlsext_tick) 3338 return 1; 3339 /* this function is called when we really expect a Certificate 3340 * message, so permit appropriate message length */ 3341 n=s->method->ssl_get_message(s, 3342 SSL3_ST_CR_CERT_A, 3343 SSL3_ST_CR_CERT_B, 3344 -1, 3345 s->max_cert_list, 3346 &ok); 3347 if (!ok) return((int)n); 3348 s->s3->tmp.reuse_message = 1; 3349 if ((s->s3->tmp.message_type == SSL3_MT_FINISHED) 3350 || (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET)) 3351 return 2; 3352 3353 return 1; 3354 } 3355#endif 3356 3357int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey) 3358 { 3359 int i = 0; 3360#ifndef OPENSSL_NO_ENGINE 3361 if (s->ctx->client_cert_engine) 3362 { 3363 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s, 3364 SSL_get_client_CA_list(s), 3365 px509, ppkey, NULL, NULL, NULL); 3366 if (i != 0) 3367 return i; 3368 } 3369#endif 3370 if (s->ctx->client_cert_cb) 3371 i = s->ctx->client_cert_cb(s,px509,ppkey); 3372 return i; 3373 } 3374