s3_clnt.c revision 277195
1/* ssl/s3_clnt.c */ 2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay@cryptsoft.com). 7 * The implementation was written so as to conform with Netscapes SSL. 8 * 9 * This library is free for commercial and non-commercial use as long as 10 * the following conditions are aheared to. The following conditions 11 * apply to all code found in this distribution, be it the RC4, RSA, 12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13 * included with this distribution is covered by the same copyright terms 14 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15 * 16 * Copyright remains Eric Young's, and as such any Copyright notices in 17 * the code are not to be removed. 18 * If this package is used in a product, Eric Young should be given attribution 19 * as the author of the parts of the library used. 20 * This can be in the form of a textual message at program startup or 21 * in documentation (online or textual) provided with the package. 22 * 23 * Redistribution and use in source and binary forms, with or without 24 * modification, are permitted provided that the following conditions 25 * are met: 26 * 1. Redistributions of source code must retain the copyright 27 * notice, this list of conditions and the following disclaimer. 28 * 2. Redistributions in binary form must reproduce the above copyright 29 * notice, this list of conditions and the following disclaimer in the 30 * documentation and/or other materials provided with the distribution. 31 * 3. All advertising materials mentioning features or use of this software 32 * must display the following acknowledgement: 33 * "This product includes cryptographic software written by 34 * Eric Young (eay@cryptsoft.com)" 35 * The word 'cryptographic' can be left out if the rouines from the library 36 * being used are not cryptographic related :-). 37 * 4. If you include any Windows specific code (or a derivative thereof) from 38 * the apps directory (application code) you must include an acknowledgement: 39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40 * 41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51 * SUCH DAMAGE. 52 * 53 * The licence and distribution terms for any publically available version or 54 * derivative of this code cannot be changed. i.e. this code cannot simply be 55 * copied and put under another distribution licence 56 * [including the GNU Public Licence.] 57 */ 58/* ==================================================================== 59 * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved. 60 * 61 * Redistribution and use in source and binary forms, with or without 62 * modification, are permitted provided that the following conditions 63 * are met: 64 * 65 * 1. Redistributions of source code must retain the above copyright 66 * notice, this list of conditions and the following disclaimer. 67 * 68 * 2. Redistributions in binary form must reproduce the above copyright 69 * notice, this list of conditions and the following disclaimer in 70 * the documentation and/or other materials provided with the 71 * distribution. 72 * 73 * 3. All advertising materials mentioning features or use of this 74 * software must display the following acknowledgment: 75 * "This product includes software developed by the OpenSSL Project 76 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" 77 * 78 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 79 * endorse or promote products derived from this software without 80 * prior written permission. For written permission, please contact 81 * openssl-core@openssl.org. 82 * 83 * 5. Products derived from this software may not be called "OpenSSL" 84 * nor may "OpenSSL" appear in their names without prior written 85 * permission of the OpenSSL Project. 86 * 87 * 6. Redistributions of any form whatsoever must retain the following 88 * acknowledgment: 89 * "This product includes software developed by the OpenSSL Project 90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)" 91 * 92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 103 * OF THE POSSIBILITY OF SUCH DAMAGE. 104 * ==================================================================== 105 * 106 * This product includes cryptographic software written by Eric Young 107 * (eay@cryptsoft.com). This product includes software written by Tim 108 * Hudson (tjh@cryptsoft.com). 109 * 110 */ 111/* ==================================================================== 112 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. 113 * 114 * Portions of the attached software ("Contribution") are developed by 115 * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project. 116 * 117 * The Contribution is licensed pursuant to the OpenSSL open source 118 * license provided above. 119 * 120 * ECC cipher suite support in OpenSSL originally written by 121 * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories. 122 * 123 */ 124/* ==================================================================== 125 * Copyright 2005 Nokia. All rights reserved. 126 * 127 * The portions of the attached software ("Contribution") is developed by 128 * Nokia Corporation and is licensed pursuant to the OpenSSL open source 129 * license. 130 * 131 * The Contribution, originally written by Mika Kousa and Pasi Eronen of 132 * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites 133 * support (see RFC 4279) to OpenSSL. 134 * 135 * No patent licenses or other rights except those expressly stated in 136 * the OpenSSL open source license shall be deemed granted or received 137 * expressly, by implication, estoppel, or otherwise. 138 * 139 * No assurances are provided by Nokia that the Contribution does not 140 * infringe the patent or other intellectual property rights of any third 141 * party or that the license provides you with all the necessary rights 142 * to make use of the Contribution. 143 * 144 * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN 145 * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA 146 * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY 147 * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR 148 * OTHERWISE. 149 */ 150 151#include <stdio.h> 152#include "ssl_locl.h" 153#include "kssl_lcl.h" 154#include <openssl/buffer.h> 155#include <openssl/rand.h> 156#include <openssl/objects.h> 157#include <openssl/evp.h> 158#include <openssl/md5.h> 159#ifdef OPENSSL_FIPS 160#include <openssl/fips.h> 161#endif 162#ifndef OPENSSL_NO_DH 163#include <openssl/dh.h> 164#endif 165#include <openssl/bn.h> 166#ifndef OPENSSL_NO_ENGINE 167#include <openssl/engine.h> 168#endif 169 170static const SSL_METHOD *ssl3_get_client_method(int ver); 171static int ca_dn_cmp(const X509_NAME * const *a,const X509_NAME * const *b); 172 173static const SSL_METHOD *ssl3_get_client_method(int ver) 174 { 175 if (ver == SSL3_VERSION) 176 return(SSLv3_client_method()); 177 else 178 return(NULL); 179 } 180 181IMPLEMENT_ssl3_meth_func(SSLv3_client_method, 182 ssl_undefined_function, 183 ssl3_connect, 184 ssl3_get_client_method) 185 186int ssl3_connect(SSL *s) 187 { 188 BUF_MEM *buf=NULL; 189 unsigned long Time=(unsigned long)time(NULL); 190 void (*cb)(const SSL *ssl,int type,int val)=NULL; 191 int ret= -1; 192 int new_state,state,skip=0; 193 194 RAND_add(&Time,sizeof(Time),0); 195 ERR_clear_error(); 196 clear_sys_error(); 197 198 if (s->info_callback != NULL) 199 cb=s->info_callback; 200 else if (s->ctx->info_callback != NULL) 201 cb=s->ctx->info_callback; 202 203 s->in_handshake++; 204 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); 205 206#ifndef OPENSSL_NO_HEARTBEATS 207 /* If we're awaiting a HeartbeatResponse, pretend we 208 * already got and don't await it anymore, because 209 * Heartbeats don't make sense during handshakes anyway. 210 */ 211 if (s->tlsext_hb_pending) 212 { 213 s->tlsext_hb_pending = 0; 214 s->tlsext_hb_seq++; 215 } 216#endif 217 218 for (;;) 219 { 220 state=s->state; 221 222 switch(s->state) 223 { 224 case SSL_ST_RENEGOTIATE: 225 s->renegotiate=1; 226 s->state=SSL_ST_CONNECT; 227 s->ctx->stats.sess_connect_renegotiate++; 228 /* break */ 229 case SSL_ST_BEFORE: 230 case SSL_ST_CONNECT: 231 case SSL_ST_BEFORE|SSL_ST_CONNECT: 232 case SSL_ST_OK|SSL_ST_CONNECT: 233 234 s->server=0; 235 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1); 236 237 if ((s->version & 0xff00 ) != 0x0300) 238 { 239 SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR); 240 ret = -1; 241 goto end; 242 } 243 244 /* s->version=SSL3_VERSION; */ 245 s->type=SSL_ST_CONNECT; 246 247 if (s->init_buf == NULL) 248 { 249 if ((buf=BUF_MEM_new()) == NULL) 250 { 251 ret= -1; 252 goto end; 253 } 254 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH)) 255 { 256 ret= -1; 257 goto end; 258 } 259 s->init_buf=buf; 260 buf=NULL; 261 } 262 263 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; } 264 265 /* setup buffing BIO */ 266 if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; } 267 268 /* don't push the buffering BIO quite yet */ 269 270 ssl3_init_finished_mac(s); 271 272 s->state=SSL3_ST_CW_CLNT_HELLO_A; 273 s->ctx->stats.sess_connect++; 274 s->init_num=0; 275 break; 276 277 case SSL3_ST_CW_CLNT_HELLO_A: 278 case SSL3_ST_CW_CLNT_HELLO_B: 279 280 s->shutdown=0; 281 ret=ssl3_client_hello(s); 282 if (ret <= 0) goto end; 283 s->state=SSL3_ST_CR_SRVR_HELLO_A; 284 s->init_num=0; 285 286 /* turn on buffering for the next lot of output */ 287 if (s->bbio != s->wbio) 288 s->wbio=BIO_push(s->bbio,s->wbio); 289 290 break; 291 292 case SSL3_ST_CR_SRVR_HELLO_A: 293 case SSL3_ST_CR_SRVR_HELLO_B: 294 ret=ssl3_get_server_hello(s); 295 if (ret <= 0) goto end; 296 297 if (s->hit) 298 { 299 s->state=SSL3_ST_CR_FINISHED_A; 300#ifndef OPENSSL_NO_TLSEXT 301 if (s->tlsext_ticket_expected) 302 { 303 /* receive renewed session ticket */ 304 s->state=SSL3_ST_CR_SESSION_TICKET_A; 305 } 306#endif 307 } 308 else 309 s->state=SSL3_ST_CR_CERT_A; 310 s->init_num=0; 311 break; 312 313 case SSL3_ST_CR_CERT_A: 314 case SSL3_ST_CR_CERT_B: 315#ifndef OPENSSL_NO_TLSEXT 316 ret=ssl3_check_finished(s); 317 if (ret <= 0) goto end; 318 if (ret == 2) 319 { 320 s->hit = 1; 321 if (s->tlsext_ticket_expected) 322 s->state=SSL3_ST_CR_SESSION_TICKET_A; 323 else 324 s->state=SSL3_ST_CR_FINISHED_A; 325 s->init_num=0; 326 break; 327 } 328#endif 329 /* Check if it is anon DH/ECDH, SRP auth */ 330 /* or PSK */ 331 if (!(s->s3->tmp.new_cipher->algorithm_auth & (SSL_aNULL|SSL_aSRP)) && 332 !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) 333 { 334 ret=ssl3_get_server_certificate(s); 335 if (ret <= 0) goto end; 336#ifndef OPENSSL_NO_TLSEXT 337 if (s->tlsext_status_expected) 338 s->state=SSL3_ST_CR_CERT_STATUS_A; 339 else 340 s->state=SSL3_ST_CR_KEY_EXCH_A; 341 } 342 else 343 { 344 skip = 1; 345 s->state=SSL3_ST_CR_KEY_EXCH_A; 346 } 347#else 348 } 349 else 350 skip=1; 351 352 s->state=SSL3_ST_CR_KEY_EXCH_A; 353#endif 354 s->init_num=0; 355 break; 356 357 case SSL3_ST_CR_KEY_EXCH_A: 358 case SSL3_ST_CR_KEY_EXCH_B: 359 ret=ssl3_get_key_exchange(s); 360 if (ret <= 0) goto end; 361 s->state=SSL3_ST_CR_CERT_REQ_A; 362 s->init_num=0; 363 364 /* at this point we check that we have the 365 * required stuff from the server */ 366 if (!ssl3_check_cert_and_algorithm(s)) 367 { 368 ret= -1; 369 goto end; 370 } 371 break; 372 373 case SSL3_ST_CR_CERT_REQ_A: 374 case SSL3_ST_CR_CERT_REQ_B: 375 ret=ssl3_get_certificate_request(s); 376 if (ret <= 0) goto end; 377 s->state=SSL3_ST_CR_SRVR_DONE_A; 378 s->init_num=0; 379 break; 380 381 case SSL3_ST_CR_SRVR_DONE_A: 382 case SSL3_ST_CR_SRVR_DONE_B: 383 ret=ssl3_get_server_done(s); 384 if (ret <= 0) goto end; 385#ifndef OPENSSL_NO_SRP 386 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) 387 { 388 if ((ret = SRP_Calc_A_param(s))<=0) 389 { 390 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_SRP_A_CALC); 391 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR); 392 goto end; 393 } 394 } 395#endif 396 if (s->s3->tmp.cert_req) 397 s->state=SSL3_ST_CW_CERT_A; 398 else 399 s->state=SSL3_ST_CW_KEY_EXCH_A; 400 s->init_num=0; 401 402 break; 403 404 case SSL3_ST_CW_CERT_A: 405 case SSL3_ST_CW_CERT_B: 406 case SSL3_ST_CW_CERT_C: 407 case SSL3_ST_CW_CERT_D: 408 ret=ssl3_send_client_certificate(s); 409 if (ret <= 0) goto end; 410 s->state=SSL3_ST_CW_KEY_EXCH_A; 411 s->init_num=0; 412 break; 413 414 case SSL3_ST_CW_KEY_EXCH_A: 415 case SSL3_ST_CW_KEY_EXCH_B: 416 ret=ssl3_send_client_key_exchange(s); 417 if (ret <= 0) goto end; 418 /* EAY EAY EAY need to check for DH fix cert 419 * sent back */ 420 /* For TLS, cert_req is set to 2, so a cert chain 421 * of nothing is sent, but no verify packet is sent */ 422 /* XXX: For now, we do not support client 423 * authentication in ECDH cipher suites with 424 * ECDH (rather than ECDSA) certificates. 425 * We need to skip the certificate verify 426 * message when client's ECDH public key is sent 427 * inside the client certificate. 428 */ 429 if (s->s3->tmp.cert_req == 1) 430 { 431 s->state=SSL3_ST_CW_CERT_VRFY_A; 432 } 433 else 434 { 435 s->state=SSL3_ST_CW_CHANGE_A; 436 s->s3->change_cipher_spec=0; 437 } 438 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) 439 { 440 s->state=SSL3_ST_CW_CHANGE_A; 441 s->s3->change_cipher_spec=0; 442 } 443 444 s->init_num=0; 445 break; 446 447 case SSL3_ST_CW_CERT_VRFY_A: 448 case SSL3_ST_CW_CERT_VRFY_B: 449 ret=ssl3_send_client_verify(s); 450 if (ret <= 0) goto end; 451 s->state=SSL3_ST_CW_CHANGE_A; 452 s->init_num=0; 453 s->s3->change_cipher_spec=0; 454 break; 455 456 case SSL3_ST_CW_CHANGE_A: 457 case SSL3_ST_CW_CHANGE_B: 458 ret=ssl3_send_change_cipher_spec(s, 459 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B); 460 if (ret <= 0) goto end; 461 462#if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG) 463 s->state=SSL3_ST_CW_FINISHED_A; 464#else 465 if (s->s3->next_proto_neg_seen) 466 s->state=SSL3_ST_CW_NEXT_PROTO_A; 467 else 468 s->state=SSL3_ST_CW_FINISHED_A; 469#endif 470 s->init_num=0; 471 472 s->session->cipher=s->s3->tmp.new_cipher; 473#ifdef OPENSSL_NO_COMP 474 s->session->compress_meth=0; 475#else 476 if (s->s3->tmp.new_compression == NULL) 477 s->session->compress_meth=0; 478 else 479 s->session->compress_meth= 480 s->s3->tmp.new_compression->id; 481#endif 482 if (!s->method->ssl3_enc->setup_key_block(s)) 483 { 484 ret= -1; 485 goto end; 486 } 487 488 if (!s->method->ssl3_enc->change_cipher_state(s, 489 SSL3_CHANGE_CIPHER_CLIENT_WRITE)) 490 { 491 ret= -1; 492 goto end; 493 } 494 495 break; 496 497#if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG) 498 case SSL3_ST_CW_NEXT_PROTO_A: 499 case SSL3_ST_CW_NEXT_PROTO_B: 500 ret=ssl3_send_next_proto(s); 501 if (ret <= 0) goto end; 502 s->state=SSL3_ST_CW_FINISHED_A; 503 break; 504#endif 505 506 case SSL3_ST_CW_FINISHED_A: 507 case SSL3_ST_CW_FINISHED_B: 508 ret=ssl3_send_finished(s, 509 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B, 510 s->method->ssl3_enc->client_finished_label, 511 s->method->ssl3_enc->client_finished_label_len); 512 if (ret <= 0) goto end; 513 s->s3->flags |= SSL3_FLAGS_CCS_OK; 514 s->state=SSL3_ST_CW_FLUSH; 515 516 /* clear flags */ 517 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER; 518 if (s->hit) 519 { 520 s->s3->tmp.next_state=SSL_ST_OK; 521 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED) 522 { 523 s->state=SSL_ST_OK; 524 s->s3->flags|=SSL3_FLAGS_POP_BUFFER; 525 s->s3->delay_buf_pop_ret=0; 526 } 527 } 528 else 529 { 530#ifndef OPENSSL_NO_TLSEXT 531 /* Allow NewSessionTicket if ticket expected */ 532 if (s->tlsext_ticket_expected) 533 s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A; 534 else 535#endif 536 537 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A; 538 } 539 s->init_num=0; 540 break; 541 542#ifndef OPENSSL_NO_TLSEXT 543 case SSL3_ST_CR_SESSION_TICKET_A: 544 case SSL3_ST_CR_SESSION_TICKET_B: 545 ret=ssl3_get_new_session_ticket(s); 546 if (ret <= 0) goto end; 547 s->state=SSL3_ST_CR_FINISHED_A; 548 s->init_num=0; 549 break; 550 551 case SSL3_ST_CR_CERT_STATUS_A: 552 case SSL3_ST_CR_CERT_STATUS_B: 553 ret=ssl3_get_cert_status(s); 554 if (ret <= 0) goto end; 555 s->state=SSL3_ST_CR_KEY_EXCH_A; 556 s->init_num=0; 557 break; 558#endif 559 560 case SSL3_ST_CR_FINISHED_A: 561 case SSL3_ST_CR_FINISHED_B: 562 563 s->s3->flags |= SSL3_FLAGS_CCS_OK; 564 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A, 565 SSL3_ST_CR_FINISHED_B); 566 if (ret <= 0) goto end; 567 568 if (s->hit) 569 s->state=SSL3_ST_CW_CHANGE_A; 570 else 571 s->state=SSL_ST_OK; 572 s->init_num=0; 573 break; 574 575 case SSL3_ST_CW_FLUSH: 576 s->rwstate=SSL_WRITING; 577 if (BIO_flush(s->wbio) <= 0) 578 { 579 ret= -1; 580 goto end; 581 } 582 s->rwstate=SSL_NOTHING; 583 s->state=s->s3->tmp.next_state; 584 break; 585 586 case SSL_ST_OK: 587 /* clean a few things up */ 588 ssl3_cleanup_key_block(s); 589 590 if (s->init_buf != NULL) 591 { 592 BUF_MEM_free(s->init_buf); 593 s->init_buf=NULL; 594 } 595 596 /* If we are not 'joining' the last two packets, 597 * remove the buffering now */ 598 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER)) 599 ssl_free_wbio_buffer(s); 600 /* else do it later in ssl3_write */ 601 602 s->init_num=0; 603 s->renegotiate=0; 604 s->new_session=0; 605 606 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT); 607 if (s->hit) s->ctx->stats.sess_hit++; 608 609 ret=1; 610 /* s->server=0; */ 611 s->handshake_func=ssl3_connect; 612 s->ctx->stats.sess_connect_good++; 613 614 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1); 615 616 goto end; 617 /* break; */ 618 619 default: 620 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE); 621 ret= -1; 622 goto end; 623 /* break; */ 624 } 625 626 /* did we do anything */ 627 if (!s->s3->tmp.reuse_message && !skip) 628 { 629 if (s->debug) 630 { 631 if ((ret=BIO_flush(s->wbio)) <= 0) 632 goto end; 633 } 634 635 if ((cb != NULL) && (s->state != state)) 636 { 637 new_state=s->state; 638 s->state=state; 639 cb(s,SSL_CB_CONNECT_LOOP,1); 640 s->state=new_state; 641 } 642 } 643 skip=0; 644 } 645end: 646 s->in_handshake--; 647 if (buf != NULL) 648 BUF_MEM_free(buf); 649 if (cb != NULL) 650 cb(s,SSL_CB_CONNECT_EXIT,ret); 651 return(ret); 652 } 653 654 655int ssl3_client_hello(SSL *s) 656 { 657 unsigned char *buf; 658 unsigned char *p,*d; 659 int i; 660 unsigned long l; 661#ifndef OPENSSL_NO_COMP 662 int j; 663 SSL_COMP *comp; 664#endif 665 666 buf=(unsigned char *)s->init_buf->data; 667 if (s->state == SSL3_ST_CW_CLNT_HELLO_A) 668 { 669 SSL_SESSION *sess = s->session; 670 if ((sess == NULL) || 671 (sess->ssl_version != s->version) || 672#ifdef OPENSSL_NO_TLSEXT 673 !sess->session_id_length || 674#else 675 (!sess->session_id_length && !sess->tlsext_tick) || 676#endif 677 (sess->not_resumable)) 678 { 679 if (!ssl_get_new_session(s,0)) 680 goto err; 681 } 682 /* else use the pre-loaded session */ 683 684 p=s->s3->client_random; 685 686 if (ssl_fill_hello_random(s, 0, p, SSL3_RANDOM_SIZE) <= 0) 687 goto err; 688 689 /* Do the message type and length last */ 690 d=p= &(buf[4]); 691 692 /* version indicates the negotiated version: for example from 693 * an SSLv2/v3 compatible client hello). The client_version 694 * field is the maximum version we permit and it is also 695 * used in RSA encrypted premaster secrets. Some servers can 696 * choke if we initially report a higher version then 697 * renegotiate to a lower one in the premaster secret. This 698 * didn't happen with TLS 1.0 as most servers supported it 699 * but it can with TLS 1.1 or later if the server only supports 700 * 1.0. 701 * 702 * Possible scenario with previous logic: 703 * 1. Client hello indicates TLS 1.2 704 * 2. Server hello says TLS 1.0 705 * 3. RSA encrypted premaster secret uses 1.2. 706 * 4. Handhaked proceeds using TLS 1.0. 707 * 5. Server sends hello request to renegotiate. 708 * 6. Client hello indicates TLS v1.0 as we now 709 * know that is maximum server supports. 710 * 7. Server chokes on RSA encrypted premaster secret 711 * containing version 1.0. 712 * 713 * For interoperability it should be OK to always use the 714 * maximum version we support in client hello and then rely 715 * on the checking of version to ensure the servers isn't 716 * being inconsistent: for example initially negotiating with 717 * TLS 1.0 and renegotiating with TLS 1.2. We do this by using 718 * client_version in client hello and not resetting it to 719 * the negotiated version. 720 */ 721#if 0 722 *(p++)=s->version>>8; 723 *(p++)=s->version&0xff; 724 s->client_version=s->version; 725#else 726 *(p++)=s->client_version>>8; 727 *(p++)=s->client_version&0xff; 728#endif 729 730 /* Random stuff */ 731 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE); 732 p+=SSL3_RANDOM_SIZE; 733 734 /* Session ID */ 735 if (s->new_session) 736 i=0; 737 else 738 i=s->session->session_id_length; 739 *(p++)=i; 740 if (i != 0) 741 { 742 if (i > (int)sizeof(s->session->session_id)) 743 { 744 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); 745 goto err; 746 } 747 memcpy(p,s->session->session_id,i); 748 p+=i; 749 } 750 751 /* Ciphers supported */ 752 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0); 753 if (i == 0) 754 { 755 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE); 756 goto err; 757 } 758#ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH 759 /* Some servers hang if client hello > 256 bytes 760 * as hack workaround chop number of supported ciphers 761 * to keep it well below this if we use TLS v1.2 762 */ 763 if (TLS1_get_version(s) >= TLS1_2_VERSION 764 && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH) 765 i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1; 766#endif 767 s2n(i,p); 768 p+=i; 769 770 /* COMPRESSION */ 771#ifdef OPENSSL_NO_COMP 772 *(p++)=1; 773#else 774 775 if ((s->options & SSL_OP_NO_COMPRESSION) 776 || !s->ctx->comp_methods) 777 j=0; 778 else 779 j=sk_SSL_COMP_num(s->ctx->comp_methods); 780 *(p++)=1+j; 781 for (i=0; i<j; i++) 782 { 783 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i); 784 *(p++)=comp->id; 785 } 786#endif 787 *(p++)=0; /* Add the NULL method */ 788 789#ifndef OPENSSL_NO_TLSEXT 790 /* TLS extensions*/ 791 if (ssl_prepare_clienthello_tlsext(s) <= 0) 792 { 793 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT); 794 goto err; 795 } 796 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL) 797 { 798 SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR); 799 goto err; 800 } 801#endif 802 803 l=(p-d); 804 d=buf; 805 *(d++)=SSL3_MT_CLIENT_HELLO; 806 l2n3(l,d); 807 808 s->state=SSL3_ST_CW_CLNT_HELLO_B; 809 /* number of bytes to write */ 810 s->init_num=p-buf; 811 s->init_off=0; 812 } 813 814 /* SSL3_ST_CW_CLNT_HELLO_B */ 815 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 816err: 817 return(-1); 818 } 819 820int ssl3_get_server_hello(SSL *s) 821 { 822 STACK_OF(SSL_CIPHER) *sk; 823 const SSL_CIPHER *c; 824 unsigned char *p,*d; 825 int i,al,ok; 826 unsigned int j; 827 long n; 828#ifndef OPENSSL_NO_COMP 829 SSL_COMP *comp; 830#endif 831 832 n=s->method->ssl_get_message(s, 833 SSL3_ST_CR_SRVR_HELLO_A, 834 SSL3_ST_CR_SRVR_HELLO_B, 835 -1, 836 20000, /* ?? */ 837 &ok); 838 839 if (!ok) return((int)n); 840 841 if ( SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER) 842 { 843 if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST) 844 { 845 if ( s->d1->send_cookie == 0) 846 { 847 s->s3->tmp.reuse_message = 1; 848 return 1; 849 } 850 else /* already sent a cookie */ 851 { 852 al=SSL_AD_UNEXPECTED_MESSAGE; 853 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE); 854 goto f_err; 855 } 856 } 857 } 858 859 if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO) 860 { 861 al=SSL_AD_UNEXPECTED_MESSAGE; 862 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE); 863 goto f_err; 864 } 865 866 d=p=(unsigned char *)s->init_msg; 867 868 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff))) 869 { 870 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION); 871 s->version=(s->version&0xff00)|p[1]; 872 al=SSL_AD_PROTOCOL_VERSION; 873 goto f_err; 874 } 875 p+=2; 876 877 /* load the server hello data */ 878 /* load the server random */ 879 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE); 880 p+=SSL3_RANDOM_SIZE; 881 882 /* get the session-id */ 883 j= *(p++); 884 885 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE)) 886 { 887 al=SSL_AD_ILLEGAL_PARAMETER; 888 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG); 889 goto f_err; 890 } 891 892#ifndef OPENSSL_NO_TLSEXT 893 /* check if we want to resume the session based on external pre-shared secret */ 894 if (s->version >= TLS1_VERSION && s->tls_session_secret_cb) 895 { 896 SSL_CIPHER *pref_cipher=NULL; 897 s->session->master_key_length=sizeof(s->session->master_key); 898 if (s->tls_session_secret_cb(s, s->session->master_key, 899 &s->session->master_key_length, 900 NULL, &pref_cipher, 901 s->tls_session_secret_cb_arg)) 902 { 903 s->session->cipher = pref_cipher ? 904 pref_cipher : ssl_get_cipher_by_char(s, p+j); 905 s->s3->flags |= SSL3_FLAGS_CCS_OK; 906 } 907 } 908#endif /* OPENSSL_NO_TLSEXT */ 909 910 if (j != 0 && j == s->session->session_id_length 911 && memcmp(p,s->session->session_id,j) == 0) 912 { 913 if(s->sid_ctx_length != s->session->sid_ctx_length 914 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length)) 915 { 916 /* actually a client application bug */ 917 al=SSL_AD_ILLEGAL_PARAMETER; 918 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); 919 goto f_err; 920 } 921 s->s3->flags |= SSL3_FLAGS_CCS_OK; 922 s->hit=1; 923 } 924 else /* a miss or crap from the other end */ 925 { 926 /* If we were trying for session-id reuse, make a new 927 * SSL_SESSION so we don't stuff up other people */ 928 s->hit=0; 929 if (s->session->session_id_length > 0) 930 { 931 if (!ssl_get_new_session(s,0)) 932 { 933 al=SSL_AD_INTERNAL_ERROR; 934 goto f_err; 935 } 936 } 937 s->session->session_id_length=j; 938 memcpy(s->session->session_id,p,j); /* j could be 0 */ 939 } 940 p+=j; 941 c=ssl_get_cipher_by_char(s,p); 942 if (c == NULL) 943 { 944 /* unknown cipher */ 945 al=SSL_AD_ILLEGAL_PARAMETER; 946 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED); 947 goto f_err; 948 } 949 /* TLS v1.2 only ciphersuites require v1.2 or later */ 950 if ((c->algorithm_ssl & SSL_TLSV1_2) && 951 (TLS1_get_version(s) < TLS1_2_VERSION)) 952 { 953 al=SSL_AD_ILLEGAL_PARAMETER; 954 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED); 955 goto f_err; 956 } 957#ifndef OPENSSL_NO_SRP 958 if (((c->algorithm_mkey & SSL_kSRP) || (c->algorithm_auth & SSL_aSRP)) && 959 !(s->srp_ctx.srp_Mask & SSL_kSRP)) 960 { 961 al=SSL_AD_ILLEGAL_PARAMETER; 962 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED); 963 goto f_err; 964 } 965#endif /* OPENSSL_NO_SRP */ 966 p+=ssl_put_cipher_by_char(s,NULL,NULL); 967 968 sk=ssl_get_ciphers_by_id(s); 969 i=sk_SSL_CIPHER_find(sk,c); 970 if (i < 0) 971 { 972 /* we did not say we would use this cipher */ 973 al=SSL_AD_ILLEGAL_PARAMETER; 974 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED); 975 goto f_err; 976 } 977 978 /* Depending on the session caching (internal/external), the cipher 979 and/or cipher_id values may not be set. Make sure that 980 cipher_id is set and use it for comparison. */ 981 if (s->session->cipher) 982 s->session->cipher_id = s->session->cipher->id; 983 if (s->hit && (s->session->cipher_id != c->id)) 984 { 985/* Workaround is now obsolete */ 986#if 0 987 if (!(s->options & 988 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG)) 989#endif 990 { 991 al=SSL_AD_ILLEGAL_PARAMETER; 992 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); 993 goto f_err; 994 } 995 } 996 s->s3->tmp.new_cipher=c; 997 /* Don't digest cached records if TLS v1.2: we may need them for 998 * client authentication. 999 */ 1000 if (TLS1_get_version(s) < TLS1_2_VERSION && !ssl3_digest_cached_records(s)) 1001 { 1002 al = SSL_AD_INTERNAL_ERROR; 1003 goto f_err; 1004 } 1005 /* lets get the compression algorithm */ 1006 /* COMPRESSION */ 1007#ifdef OPENSSL_NO_COMP 1008 if (*(p++) != 0) 1009 { 1010 al=SSL_AD_ILLEGAL_PARAMETER; 1011 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); 1012 goto f_err; 1013 } 1014 /* If compression is disabled we'd better not try to resume a session 1015 * using compression. 1016 */ 1017 if (s->session->compress_meth != 0) 1018 { 1019 al=SSL_AD_INTERNAL_ERROR; 1020 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_INCONSISTENT_COMPRESSION); 1021 goto f_err; 1022 } 1023#else 1024 j= *(p++); 1025 if (s->hit && j != s->session->compress_meth) 1026 { 1027 al=SSL_AD_ILLEGAL_PARAMETER; 1028 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED); 1029 goto f_err; 1030 } 1031 if (j == 0) 1032 comp=NULL; 1033 else if (s->options & SSL_OP_NO_COMPRESSION) 1034 { 1035 al=SSL_AD_ILLEGAL_PARAMETER; 1036 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_COMPRESSION_DISABLED); 1037 goto f_err; 1038 } 1039 else 1040 comp=ssl3_comp_find(s->ctx->comp_methods,j); 1041 1042 if ((j != 0) && (comp == NULL)) 1043 { 1044 al=SSL_AD_ILLEGAL_PARAMETER; 1045 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); 1046 goto f_err; 1047 } 1048 else 1049 { 1050 s->s3->tmp.new_compression=comp; 1051 } 1052#endif 1053 1054#ifndef OPENSSL_NO_TLSEXT 1055 /* TLS extensions*/ 1056 if (s->version >= SSL3_VERSION) 1057 { 1058 if (!ssl_parse_serverhello_tlsext(s,&p,d,n, &al)) 1059 { 1060 /* 'al' set by ssl_parse_serverhello_tlsext */ 1061 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT); 1062 goto f_err; 1063 } 1064 if (ssl_check_serverhello_tlsext(s) <= 0) 1065 { 1066 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SERVERHELLO_TLSEXT); 1067 goto err; 1068 } 1069 } 1070#endif 1071 1072 if (p != (d+n)) 1073 { 1074 /* wrong packet length */ 1075 al=SSL_AD_DECODE_ERROR; 1076 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH); 1077 goto f_err; 1078 } 1079 1080 return(1); 1081f_err: 1082 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1083err: 1084 return(-1); 1085 } 1086 1087int ssl3_get_server_certificate(SSL *s) 1088 { 1089 int al,i,ok,ret= -1; 1090 unsigned long n,nc,llen,l; 1091 X509 *x=NULL; 1092 const unsigned char *q,*p; 1093 unsigned char *d; 1094 STACK_OF(X509) *sk=NULL; 1095 SESS_CERT *sc; 1096 EVP_PKEY *pkey=NULL; 1097 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */ 1098 1099 n=s->method->ssl_get_message(s, 1100 SSL3_ST_CR_CERT_A, 1101 SSL3_ST_CR_CERT_B, 1102 -1, 1103 s->max_cert_list, 1104 &ok); 1105 1106 if (!ok) return((int)n); 1107 1108 if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) || 1109 ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) && 1110 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE))) 1111 { 1112 s->s3->tmp.reuse_message=1; 1113 return(1); 1114 } 1115 1116 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE) 1117 { 1118 al=SSL_AD_UNEXPECTED_MESSAGE; 1119 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE); 1120 goto f_err; 1121 } 1122 p=d=(unsigned char *)s->init_msg; 1123 1124 if ((sk=sk_X509_new_null()) == NULL) 1125 { 1126 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE); 1127 goto err; 1128 } 1129 1130 n2l3(p,llen); 1131 if (llen+3 != n) 1132 { 1133 al=SSL_AD_DECODE_ERROR; 1134 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH); 1135 goto f_err; 1136 } 1137 for (nc=0; nc<llen; ) 1138 { 1139 n2l3(p,l); 1140 if ((l+nc+3) > llen) 1141 { 1142 al=SSL_AD_DECODE_ERROR; 1143 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); 1144 goto f_err; 1145 } 1146 1147 q=p; 1148 x=d2i_X509(NULL,&q,l); 1149 if (x == NULL) 1150 { 1151 al=SSL_AD_BAD_CERTIFICATE; 1152 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB); 1153 goto f_err; 1154 } 1155 if (q != (p+l)) 1156 { 1157 al=SSL_AD_DECODE_ERROR; 1158 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); 1159 goto f_err; 1160 } 1161 if (!sk_X509_push(sk,x)) 1162 { 1163 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE); 1164 goto err; 1165 } 1166 x=NULL; 1167 nc+=l+3; 1168 p=q; 1169 } 1170 1171 i=ssl_verify_cert_chain(s,sk); 1172 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0) 1173#ifndef OPENSSL_NO_KRB5 1174 && !((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) && 1175 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5)) 1176#endif /* OPENSSL_NO_KRB5 */ 1177 ) 1178 { 1179 al=ssl_verify_alarm_type(s->verify_result); 1180 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED); 1181 goto f_err; 1182 } 1183 ERR_clear_error(); /* but we keep s->verify_result */ 1184 1185 sc=ssl_sess_cert_new(); 1186 if (sc == NULL) goto err; 1187 1188 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert); 1189 s->session->sess_cert=sc; 1190 1191 sc->cert_chain=sk; 1192 /* Inconsistency alert: cert_chain does include the peer's 1193 * certificate, which we don't include in s3_srvr.c */ 1194 x=sk_X509_value(sk,0); 1195 sk=NULL; 1196 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/ 1197 1198 pkey=X509_get_pubkey(x); 1199 1200 /* VRS: allow null cert if auth == KRB5 */ 1201 need_cert = ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) && 1202 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5)) 1203 ? 0 : 1; 1204 1205#ifdef KSSL_DEBUG 1206 printf("pkey,x = %p, %p\n", pkey,x); 1207 printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey)); 1208 printf("cipher, alg, nc = %s, %lx, %lx, %d\n", s->s3->tmp.new_cipher->name, 1209 s->s3->tmp.new_cipher->algorithm_mkey, s->s3->tmp.new_cipher->algorithm_auth, need_cert); 1210#endif /* KSSL_DEBUG */ 1211 1212 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey))) 1213 { 1214 x=NULL; 1215 al=SSL3_AL_FATAL; 1216 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 1217 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); 1218 goto f_err; 1219 } 1220 1221 i=ssl_cert_type(x,pkey); 1222 if (need_cert && i < 0) 1223 { 1224 x=NULL; 1225 al=SSL3_AL_FATAL; 1226 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 1227 SSL_R_UNKNOWN_CERTIFICATE_TYPE); 1228 goto f_err; 1229 } 1230 1231 if (need_cert) 1232 { 1233 sc->peer_cert_type=i; 1234 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509); 1235 /* Why would the following ever happen? 1236 * We just created sc a couple of lines ago. */ 1237 if (sc->peer_pkeys[i].x509 != NULL) 1238 X509_free(sc->peer_pkeys[i].x509); 1239 sc->peer_pkeys[i].x509=x; 1240 sc->peer_key= &(sc->peer_pkeys[i]); 1241 1242 if (s->session->peer != NULL) 1243 X509_free(s->session->peer); 1244 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509); 1245 s->session->peer=x; 1246 } 1247 else 1248 { 1249 sc->peer_cert_type=i; 1250 sc->peer_key= NULL; 1251 1252 if (s->session->peer != NULL) 1253 X509_free(s->session->peer); 1254 s->session->peer=NULL; 1255 } 1256 s->session->verify_result = s->verify_result; 1257 1258 x=NULL; 1259 ret=1; 1260 1261 if (0) 1262 { 1263f_err: 1264 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1265 } 1266err: 1267 EVP_PKEY_free(pkey); 1268 X509_free(x); 1269 sk_X509_pop_free(sk,X509_free); 1270 return(ret); 1271 } 1272 1273int ssl3_get_key_exchange(SSL *s) 1274 { 1275#ifndef OPENSSL_NO_RSA 1276 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2]; 1277#endif 1278 EVP_MD_CTX md_ctx; 1279 unsigned char *param,*p; 1280 int al,j,ok; 1281 long i,param_len,n,alg_k,alg_a; 1282 EVP_PKEY *pkey=NULL; 1283 const EVP_MD *md = NULL; 1284#ifndef OPENSSL_NO_RSA 1285 RSA *rsa=NULL; 1286#endif 1287#ifndef OPENSSL_NO_DH 1288 DH *dh=NULL; 1289#endif 1290#ifndef OPENSSL_NO_ECDH 1291 EC_KEY *ecdh = NULL; 1292 BN_CTX *bn_ctx = NULL; 1293 EC_POINT *srvr_ecpoint = NULL; 1294 int curve_nid = 0; 1295 int encoded_pt_len = 0; 1296#endif 1297 1298 EVP_MD_CTX_init(&md_ctx); 1299 1300 /* use same message size as in ssl3_get_certificate_request() 1301 * as ServerKeyExchange message may be skipped */ 1302 n=s->method->ssl_get_message(s, 1303 SSL3_ST_CR_KEY_EXCH_A, 1304 SSL3_ST_CR_KEY_EXCH_B, 1305 -1, 1306 s->max_cert_list, 1307 &ok); 1308 if (!ok) return((int)n); 1309 1310 alg_k=s->s3->tmp.new_cipher->algorithm_mkey; 1311 1312 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE) 1313 { 1314 /* 1315 * Can't skip server key exchange if this is an ephemeral 1316 * ciphersuite. 1317 */ 1318 if (alg_k & (SSL_kEDH|SSL_kEECDH)) 1319 { 1320 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); 1321 al = SSL_AD_UNEXPECTED_MESSAGE; 1322 goto f_err; 1323 } 1324#ifndef OPENSSL_NO_PSK 1325 /* In plain PSK ciphersuite, ServerKeyExchange can be 1326 omitted if no identity hint is sent. Set 1327 session->sess_cert anyway to avoid problems 1328 later.*/ 1329 if (alg_k & SSL_kPSK) 1330 { 1331 s->session->sess_cert=ssl_sess_cert_new(); 1332 if (s->ctx->psk_identity_hint) 1333 OPENSSL_free(s->ctx->psk_identity_hint); 1334 s->ctx->psk_identity_hint = NULL; 1335 } 1336#endif 1337 s->s3->tmp.reuse_message=1; 1338 return(1); 1339 } 1340 1341 param=p=(unsigned char *)s->init_msg; 1342 if (s->session->sess_cert != NULL) 1343 { 1344#ifndef OPENSSL_NO_RSA 1345 if (s->session->sess_cert->peer_rsa_tmp != NULL) 1346 { 1347 RSA_free(s->session->sess_cert->peer_rsa_tmp); 1348 s->session->sess_cert->peer_rsa_tmp=NULL; 1349 } 1350#endif 1351#ifndef OPENSSL_NO_DH 1352 if (s->session->sess_cert->peer_dh_tmp) 1353 { 1354 DH_free(s->session->sess_cert->peer_dh_tmp); 1355 s->session->sess_cert->peer_dh_tmp=NULL; 1356 } 1357#endif 1358#ifndef OPENSSL_NO_ECDH 1359 if (s->session->sess_cert->peer_ecdh_tmp) 1360 { 1361 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp); 1362 s->session->sess_cert->peer_ecdh_tmp=NULL; 1363 } 1364#endif 1365 } 1366 else 1367 { 1368 s->session->sess_cert=ssl_sess_cert_new(); 1369 } 1370 1371 /* Total length of the parameters including the length prefix */ 1372 param_len=0; 1373 1374 alg_a=s->s3->tmp.new_cipher->algorithm_auth; 1375 1376 al=SSL_AD_DECODE_ERROR; 1377 1378#ifndef OPENSSL_NO_PSK 1379 if (alg_k & SSL_kPSK) 1380 { 1381 char tmp_id_hint[PSK_MAX_IDENTITY_LEN+1]; 1382 1383 param_len = 2; 1384 if (param_len > n) 1385 { 1386 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1387 SSL_R_LENGTH_TOO_SHORT); 1388 goto f_err; 1389 } 1390 n2s(p,i); 1391 1392 /* Store PSK identity hint for later use, hint is used 1393 * in ssl3_send_client_key_exchange. Assume that the 1394 * maximum length of a PSK identity hint can be as 1395 * long as the maximum length of a PSK identity. */ 1396 if (i > PSK_MAX_IDENTITY_LEN) 1397 { 1398 al=SSL_AD_HANDSHAKE_FAILURE; 1399 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1400 SSL_R_DATA_LENGTH_TOO_LONG); 1401 goto f_err; 1402 } 1403 if (i > n - param_len) 1404 { 1405 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1406 SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH); 1407 goto f_err; 1408 } 1409 param_len += i; 1410 1411 /* If received PSK identity hint contains NULL 1412 * characters, the hint is truncated from the first 1413 * NULL. p may not be ending with NULL, so create a 1414 * NULL-terminated string. */ 1415 memcpy(tmp_id_hint, p, i); 1416 memset(tmp_id_hint+i, 0, PSK_MAX_IDENTITY_LEN+1-i); 1417 if (s->ctx->psk_identity_hint != NULL) 1418 OPENSSL_free(s->ctx->psk_identity_hint); 1419 s->ctx->psk_identity_hint = BUF_strdup(tmp_id_hint); 1420 if (s->ctx->psk_identity_hint == NULL) 1421 { 1422 al=SSL_AD_HANDSHAKE_FAILURE; 1423 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); 1424 goto f_err; 1425 } 1426 1427 p+=i; 1428 n-=param_len; 1429 } 1430 else 1431#endif /* !OPENSSL_NO_PSK */ 1432#ifndef OPENSSL_NO_SRP 1433 if (alg_k & SSL_kSRP) 1434 { 1435 param_len = 2; 1436 if (param_len > n) 1437 { 1438 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1439 SSL_R_LENGTH_TOO_SHORT); 1440 goto f_err; 1441 } 1442 n2s(p,i); 1443 1444 if (i > n - param_len) 1445 { 1446 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_N_LENGTH); 1447 goto f_err; 1448 } 1449 param_len += i; 1450 1451 if (!(s->srp_ctx.N=BN_bin2bn(p,i,NULL))) 1452 { 1453 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1454 goto err; 1455 } 1456 p+=i; 1457 1458 1459 if (2 > n - param_len) 1460 { 1461 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1462 SSL_R_LENGTH_TOO_SHORT); 1463 goto f_err; 1464 } 1465 param_len += 2; 1466 1467 n2s(p,i); 1468 1469 if (i > n - param_len) 1470 { 1471 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_G_LENGTH); 1472 goto f_err; 1473 } 1474 param_len += i; 1475 1476 if (!(s->srp_ctx.g=BN_bin2bn(p,i,NULL))) 1477 { 1478 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1479 goto err; 1480 } 1481 p+=i; 1482 1483 1484 if (1 > n - param_len) 1485 { 1486 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1487 SSL_R_LENGTH_TOO_SHORT); 1488 goto f_err; 1489 } 1490 param_len += 1; 1491 1492 i = (unsigned int)(p[0]); 1493 p++; 1494 1495 if (i > n - param_len) 1496 { 1497 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_S_LENGTH); 1498 goto f_err; 1499 } 1500 param_len += i; 1501 1502 if (!(s->srp_ctx.s=BN_bin2bn(p,i,NULL))) 1503 { 1504 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1505 goto err; 1506 } 1507 p+=i; 1508 1509 if (2 > n - param_len) 1510 { 1511 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1512 SSL_R_LENGTH_TOO_SHORT); 1513 goto f_err; 1514 } 1515 param_len += 2; 1516 1517 n2s(p,i); 1518 1519 if (i > n - param_len) 1520 { 1521 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_B_LENGTH); 1522 goto f_err; 1523 } 1524 param_len += i; 1525 1526 if (!(s->srp_ctx.B=BN_bin2bn(p,i,NULL))) 1527 { 1528 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1529 goto err; 1530 } 1531 p+=i; 1532 n-=param_len; 1533 1534 if (!srp_verify_server_param(s, &al)) 1535 { 1536 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_PARAMETERS); 1537 goto f_err; 1538 } 1539 1540/* We must check if there is a certificate */ 1541#ifndef OPENSSL_NO_RSA 1542 if (alg_a & SSL_aRSA) 1543 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1544#else 1545 if (0) 1546 ; 1547#endif 1548#ifndef OPENSSL_NO_DSA 1549 else if (alg_a & SSL_aDSS) 1550 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509); 1551#endif 1552 } 1553 else 1554#endif /* !OPENSSL_NO_SRP */ 1555#ifndef OPENSSL_NO_RSA 1556 if (alg_k & SSL_kRSA) 1557 { 1558 /* Temporary RSA keys only allowed in export ciphersuites */ 1559 if (!SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)) 1560 { 1561 al=SSL_AD_UNEXPECTED_MESSAGE; 1562 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE); 1563 goto f_err; 1564 } 1565 if ((rsa=RSA_new()) == NULL) 1566 { 1567 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1568 goto err; 1569 } 1570 1571 param_len = 2; 1572 if (param_len > n) 1573 { 1574 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1575 SSL_R_LENGTH_TOO_SHORT); 1576 goto f_err; 1577 } 1578 n2s(p,i); 1579 1580 if (i > n - param_len) 1581 { 1582 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH); 1583 goto f_err; 1584 } 1585 param_len += i; 1586 1587 if (!(rsa->n=BN_bin2bn(p,i,rsa->n))) 1588 { 1589 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1590 goto err; 1591 } 1592 p+=i; 1593 1594 if (2 > n - param_len) 1595 { 1596 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1597 SSL_R_LENGTH_TOO_SHORT); 1598 goto f_err; 1599 } 1600 param_len += 2; 1601 1602 n2s(p,i); 1603 1604 if (i > n - param_len) 1605 { 1606 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH); 1607 goto f_err; 1608 } 1609 param_len += i; 1610 1611 if (!(rsa->e=BN_bin2bn(p,i,rsa->e))) 1612 { 1613 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1614 goto err; 1615 } 1616 p+=i; 1617 n-=param_len; 1618 1619 /* this should be because we are using an export cipher */ 1620 if (alg_a & SSL_aRSA) 1621 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1622 else 1623 { 1624 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1625 goto err; 1626 } 1627 s->session->sess_cert->peer_rsa_tmp=rsa; 1628 rsa=NULL; 1629 } 1630#else /* OPENSSL_NO_RSA */ 1631 if (0) 1632 ; 1633#endif 1634#ifndef OPENSSL_NO_DH 1635 else if (alg_k & SSL_kEDH) 1636 { 1637 if ((dh=DH_new()) == NULL) 1638 { 1639 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB); 1640 goto err; 1641 } 1642 1643 param_len = 2; 1644 if (param_len > n) 1645 { 1646 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1647 SSL_R_LENGTH_TOO_SHORT); 1648 goto f_err; 1649 } 1650 n2s(p,i); 1651 1652 if (i > n - param_len) 1653 { 1654 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH); 1655 goto f_err; 1656 } 1657 param_len += i; 1658 1659 if (!(dh->p=BN_bin2bn(p,i,NULL))) 1660 { 1661 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1662 goto err; 1663 } 1664 p+=i; 1665 1666 if (2 > n - param_len) 1667 { 1668 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1669 SSL_R_LENGTH_TOO_SHORT); 1670 goto f_err; 1671 } 1672 param_len += 2; 1673 1674 n2s(p,i); 1675 1676 if (i > n - param_len) 1677 { 1678 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH); 1679 goto f_err; 1680 } 1681 param_len += i; 1682 1683 if (!(dh->g=BN_bin2bn(p,i,NULL))) 1684 { 1685 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1686 goto err; 1687 } 1688 p+=i; 1689 1690 if (2 > n - param_len) 1691 { 1692 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1693 SSL_R_LENGTH_TOO_SHORT); 1694 goto f_err; 1695 } 1696 param_len += 2; 1697 1698 n2s(p,i); 1699 1700 if (i > n - param_len) 1701 { 1702 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH); 1703 goto f_err; 1704 } 1705 param_len += i; 1706 1707 if (!(dh->pub_key=BN_bin2bn(p,i,NULL))) 1708 { 1709 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1710 goto err; 1711 } 1712 p+=i; 1713 n-=param_len; 1714 1715#ifndef OPENSSL_NO_RSA 1716 if (alg_a & SSL_aRSA) 1717 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1718#else 1719 if (0) 1720 ; 1721#endif 1722#ifndef OPENSSL_NO_DSA 1723 else if (alg_a & SSL_aDSS) 1724 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509); 1725#endif 1726 /* else anonymous DH, so no certificate or pkey. */ 1727 1728 s->session->sess_cert->peer_dh_tmp=dh; 1729 dh=NULL; 1730 } 1731 else if ((alg_k & SSL_kDHr) || (alg_k & SSL_kDHd)) 1732 { 1733 al=SSL_AD_ILLEGAL_PARAMETER; 1734 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER); 1735 goto f_err; 1736 } 1737#endif /* !OPENSSL_NO_DH */ 1738 1739#ifndef OPENSSL_NO_ECDH 1740 else if (alg_k & SSL_kEECDH) 1741 { 1742 EC_GROUP *ngroup; 1743 const EC_GROUP *group; 1744 1745 if ((ecdh=EC_KEY_new()) == NULL) 1746 { 1747 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1748 goto err; 1749 } 1750 1751 /* Extract elliptic curve parameters and the 1752 * server's ephemeral ECDH public key. 1753 * Keep accumulating lengths of various components in 1754 * param_len and make sure it never exceeds n. 1755 */ 1756 1757 /* XXX: For now we only support named (not generic) curves 1758 * and the ECParameters in this case is just three bytes. We 1759 * also need one byte for the length of the encoded point 1760 */ 1761 param_len=4; 1762 if (param_len > n) 1763 { 1764 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1765 SSL_R_LENGTH_TOO_SHORT); 1766 goto f_err; 1767 } 1768 1769 if ((*p != NAMED_CURVE_TYPE) || 1770 ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0)) 1771 { 1772 al=SSL_AD_INTERNAL_ERROR; 1773 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); 1774 goto f_err; 1775 } 1776 1777 ngroup = EC_GROUP_new_by_curve_name(curve_nid); 1778 if (ngroup == NULL) 1779 { 1780 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB); 1781 goto err; 1782 } 1783 if (EC_KEY_set_group(ecdh, ngroup) == 0) 1784 { 1785 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB); 1786 goto err; 1787 } 1788 EC_GROUP_free(ngroup); 1789 1790 group = EC_KEY_get0_group(ecdh); 1791 1792 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && 1793 (EC_GROUP_get_degree(group) > 163)) 1794 { 1795 al=SSL_AD_EXPORT_RESTRICTION; 1796 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER); 1797 goto f_err; 1798 } 1799 1800 p+=3; 1801 1802 /* Next, get the encoded ECPoint */ 1803 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) || 1804 ((bn_ctx = BN_CTX_new()) == NULL)) 1805 { 1806 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1807 goto err; 1808 } 1809 1810 encoded_pt_len = *p; /* length of encoded point */ 1811 p+=1; 1812 1813 if ((encoded_pt_len > n - param_len) || 1814 (EC_POINT_oct2point(group, srvr_ecpoint, 1815 p, encoded_pt_len, bn_ctx) == 0)) 1816 { 1817 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT); 1818 goto f_err; 1819 } 1820 param_len += encoded_pt_len; 1821 1822 n-=param_len; 1823 p+=encoded_pt_len; 1824 1825 /* The ECC/TLS specification does not mention 1826 * the use of DSA to sign ECParameters in the server 1827 * key exchange message. We do support RSA and ECDSA. 1828 */ 1829 if (0) ; 1830#ifndef OPENSSL_NO_RSA 1831 else if (alg_a & SSL_aRSA) 1832 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1833#endif 1834#ifndef OPENSSL_NO_ECDSA 1835 else if (alg_a & SSL_aECDSA) 1836 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509); 1837#endif 1838 /* else anonymous ECDH, so no certificate or pkey. */ 1839 EC_KEY_set_public_key(ecdh, srvr_ecpoint); 1840 s->session->sess_cert->peer_ecdh_tmp=ecdh; 1841 ecdh=NULL; 1842 BN_CTX_free(bn_ctx); 1843 bn_ctx = NULL; 1844 EC_POINT_free(srvr_ecpoint); 1845 srvr_ecpoint = NULL; 1846 } 1847 else if (alg_k) 1848 { 1849 al=SSL_AD_UNEXPECTED_MESSAGE; 1850 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE); 1851 goto f_err; 1852 } 1853#endif /* !OPENSSL_NO_ECDH */ 1854 1855 1856 /* p points to the next byte, there are 'n' bytes left */ 1857 1858 /* if it was signed, check the signature */ 1859 if (pkey != NULL) 1860 { 1861 if (TLS1_get_version(s) >= TLS1_2_VERSION) 1862 { 1863 int sigalg; 1864 if (2 > n) 1865 { 1866 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1867 SSL_R_LENGTH_TOO_SHORT); 1868 goto f_err; 1869 } 1870 1871 sigalg = tls12_get_sigid(pkey); 1872 /* Should never happen */ 1873 if (sigalg == -1) 1874 { 1875 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1876 goto err; 1877 } 1878 /* Check key type is consistent with signature */ 1879 if (sigalg != (int)p[1]) 1880 { 1881 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_TYPE); 1882 al=SSL_AD_DECODE_ERROR; 1883 goto f_err; 1884 } 1885 md = tls12_get_hash(p[0]); 1886 if (md == NULL) 1887 { 1888 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNKNOWN_DIGEST); 1889 goto f_err; 1890 } 1891#ifdef SSL_DEBUG 1892fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md)); 1893#endif 1894 p += 2; 1895 n -= 2; 1896 } 1897 else 1898 md = EVP_sha1(); 1899 1900 if (2 > n) 1901 { 1902 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1903 SSL_R_LENGTH_TOO_SHORT); 1904 goto f_err; 1905 } 1906 n2s(p,i); 1907 n-=2; 1908 j=EVP_PKEY_size(pkey); 1909 1910 /* Check signature length. If n is 0 then signature is empty */ 1911 if ((i != n) || (n > j) || (n <= 0)) 1912 { 1913 /* wrong packet length */ 1914 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH); 1915 goto f_err; 1916 } 1917 1918#ifndef OPENSSL_NO_RSA 1919 if (pkey->type == EVP_PKEY_RSA && TLS1_get_version(s) < TLS1_2_VERSION) 1920 { 1921 int num; 1922 unsigned int size; 1923 1924 j=0; 1925 q=md_buf; 1926 for (num=2; num > 0; num--) 1927 { 1928 EVP_MD_CTX_set_flags(&md_ctx, 1929 EVP_MD_CTX_FLAG_NON_FIPS_ALLOW); 1930 EVP_DigestInit_ex(&md_ctx,(num == 2) 1931 ?s->ctx->md5:s->ctx->sha1, NULL); 1932 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); 1933 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); 1934 EVP_DigestUpdate(&md_ctx,param,param_len); 1935 EVP_DigestFinal_ex(&md_ctx,q,&size); 1936 q+=size; 1937 j+=size; 1938 } 1939 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n, 1940 pkey->pkey.rsa); 1941 if (i < 0) 1942 { 1943 al=SSL_AD_DECRYPT_ERROR; 1944 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT); 1945 goto f_err; 1946 } 1947 if (i == 0) 1948 { 1949 /* bad signature */ 1950 al=SSL_AD_DECRYPT_ERROR; 1951 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE); 1952 goto f_err; 1953 } 1954 } 1955 else 1956#endif 1957 { 1958 EVP_VerifyInit_ex(&md_ctx, md, NULL); 1959 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); 1960 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); 1961 EVP_VerifyUpdate(&md_ctx,param,param_len); 1962 if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0) 1963 { 1964 /* bad signature */ 1965 al=SSL_AD_DECRYPT_ERROR; 1966 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE); 1967 goto f_err; 1968 } 1969 } 1970 } 1971 else 1972 { 1973 /* aNULL, aSRP or kPSK do not need public keys */ 1974 if (!(alg_a & (SSL_aNULL|SSL_aSRP)) && !(alg_k & SSL_kPSK)) 1975 { 1976 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1977 goto err; 1978 } 1979 /* still data left over */ 1980 if (n != 0) 1981 { 1982 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE); 1983 goto f_err; 1984 } 1985 } 1986 EVP_PKEY_free(pkey); 1987 EVP_MD_CTX_cleanup(&md_ctx); 1988 return(1); 1989f_err: 1990 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1991err: 1992 EVP_PKEY_free(pkey); 1993#ifndef OPENSSL_NO_RSA 1994 if (rsa != NULL) 1995 RSA_free(rsa); 1996#endif 1997#ifndef OPENSSL_NO_DH 1998 if (dh != NULL) 1999 DH_free(dh); 2000#endif 2001#ifndef OPENSSL_NO_ECDH 2002 BN_CTX_free(bn_ctx); 2003 EC_POINT_free(srvr_ecpoint); 2004 if (ecdh != NULL) 2005 EC_KEY_free(ecdh); 2006#endif 2007 EVP_MD_CTX_cleanup(&md_ctx); 2008 return(-1); 2009 } 2010 2011int ssl3_get_certificate_request(SSL *s) 2012 { 2013 int ok,ret=0; 2014 unsigned long n,nc,l; 2015 unsigned int llen, ctype_num,i; 2016 X509_NAME *xn=NULL; 2017 const unsigned char *p,*q; 2018 unsigned char *d; 2019 STACK_OF(X509_NAME) *ca_sk=NULL; 2020 2021 n=s->method->ssl_get_message(s, 2022 SSL3_ST_CR_CERT_REQ_A, 2023 SSL3_ST_CR_CERT_REQ_B, 2024 -1, 2025 s->max_cert_list, 2026 &ok); 2027 2028 if (!ok) return((int)n); 2029 2030 s->s3->tmp.cert_req=0; 2031 2032 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE) 2033 { 2034 s->s3->tmp.reuse_message=1; 2035 /* If we get here we don't need any cached handshake records 2036 * as we wont be doing client auth. 2037 */ 2038 if (s->s3->handshake_buffer) 2039 { 2040 if (!ssl3_digest_cached_records(s)) 2041 goto err; 2042 } 2043 return(1); 2044 } 2045 2046 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST) 2047 { 2048 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 2049 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE); 2050 goto err; 2051 } 2052 2053 /* TLS does not like anon-DH with client cert */ 2054 if (s->version > SSL3_VERSION) 2055 { 2056 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) 2057 { 2058 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 2059 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER); 2060 goto err; 2061 } 2062 } 2063 2064 p=d=(unsigned char *)s->init_msg; 2065 2066 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL) 2067 { 2068 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE); 2069 goto err; 2070 } 2071 2072 /* get the certificate types */ 2073 ctype_num= *(p++); 2074 if (ctype_num > SSL3_CT_NUMBER) 2075 ctype_num=SSL3_CT_NUMBER; 2076 for (i=0; i<ctype_num; i++) 2077 s->s3->tmp.ctype[i]= p[i]; 2078 p+=ctype_num; 2079 if (TLS1_get_version(s) >= TLS1_2_VERSION) 2080 { 2081 n2s(p, llen); 2082 /* Check we have enough room for signature algorithms and 2083 * following length value. 2084 */ 2085 if ((unsigned long)(p - d + llen + 2) > n) 2086 { 2087 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 2088 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_DATA_LENGTH_TOO_LONG); 2089 goto err; 2090 } 2091 if ((llen & 1) || !tls1_process_sigalgs(s, p, llen)) 2092 { 2093 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 2094 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_SIGNATURE_ALGORITHMS_ERROR); 2095 goto err; 2096 } 2097 p += llen; 2098 } 2099 2100 /* get the CA RDNs */ 2101 n2s(p,llen); 2102#if 0 2103{ 2104FILE *out; 2105out=fopen("/tmp/vsign.der","w"); 2106fwrite(p,1,llen,out); 2107fclose(out); 2108} 2109#endif 2110 2111 if ((unsigned long)(p - d + llen) != n) 2112 { 2113 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 2114 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH); 2115 goto err; 2116 } 2117 2118 for (nc=0; nc<llen; ) 2119 { 2120 n2s(p,l); 2121 if ((l+nc+2) > llen) 2122 { 2123 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG)) 2124 goto cont; /* netscape bugs */ 2125 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 2126 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG); 2127 goto err; 2128 } 2129 2130 q=p; 2131 2132 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL) 2133 { 2134 /* If netscape tolerance is on, ignore errors */ 2135 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG) 2136 goto cont; 2137 else 2138 { 2139 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 2140 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB); 2141 goto err; 2142 } 2143 } 2144 2145 if (q != (p+l)) 2146 { 2147 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 2148 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH); 2149 goto err; 2150 } 2151 if (!sk_X509_NAME_push(ca_sk,xn)) 2152 { 2153 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE); 2154 goto err; 2155 } 2156 2157 p+=l; 2158 nc+=l+2; 2159 } 2160 2161 if (0) 2162 { 2163cont: 2164 ERR_clear_error(); 2165 } 2166 2167 /* we should setup a certificate to return.... */ 2168 s->s3->tmp.cert_req=1; 2169 s->s3->tmp.ctype_num=ctype_num; 2170 if (s->s3->tmp.ca_names != NULL) 2171 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free); 2172 s->s3->tmp.ca_names=ca_sk; 2173 ca_sk=NULL; 2174 2175 ret=1; 2176err: 2177 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free); 2178 return(ret); 2179 } 2180 2181static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b) 2182 { 2183 return(X509_NAME_cmp(*a,*b)); 2184 } 2185#ifndef OPENSSL_NO_TLSEXT 2186int ssl3_get_new_session_ticket(SSL *s) 2187 { 2188 int ok,al,ret=0, ticklen; 2189 long n; 2190 const unsigned char *p; 2191 unsigned char *d; 2192 2193 n=s->method->ssl_get_message(s, 2194 SSL3_ST_CR_SESSION_TICKET_A, 2195 SSL3_ST_CR_SESSION_TICKET_B, 2196 -1, 2197 16384, 2198 &ok); 2199 2200 if (!ok) 2201 return((int)n); 2202 2203 if (s->s3->tmp.message_type == SSL3_MT_FINISHED) 2204 { 2205 s->s3->tmp.reuse_message=1; 2206 return(1); 2207 } 2208 if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET) 2209 { 2210 al=SSL_AD_UNEXPECTED_MESSAGE; 2211 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_BAD_MESSAGE_TYPE); 2212 goto f_err; 2213 } 2214 if (n < 6) 2215 { 2216 /* need at least ticket_lifetime_hint + ticket length */ 2217 al = SSL_AD_DECODE_ERROR; 2218 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH); 2219 goto f_err; 2220 } 2221 2222 p=d=(unsigned char *)s->init_msg; 2223 n2l(p, s->session->tlsext_tick_lifetime_hint); 2224 n2s(p, ticklen); 2225 /* ticket_lifetime_hint + ticket_length + ticket */ 2226 if (ticklen + 6 != n) 2227 { 2228 al = SSL_AD_DECODE_ERROR; 2229 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH); 2230 goto f_err; 2231 } 2232 if (s->session->tlsext_tick) 2233 { 2234 OPENSSL_free(s->session->tlsext_tick); 2235 s->session->tlsext_ticklen = 0; 2236 } 2237 s->session->tlsext_tick = OPENSSL_malloc(ticklen); 2238 if (!s->session->tlsext_tick) 2239 { 2240 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE); 2241 goto err; 2242 } 2243 memcpy(s->session->tlsext_tick, p, ticklen); 2244 s->session->tlsext_ticklen = ticklen; 2245 /* There are two ways to detect a resumed ticket sesion. 2246 * One is to set an appropriate session ID and then the server 2247 * must return a match in ServerHello. This allows the normal 2248 * client session ID matching to work and we know much 2249 * earlier that the ticket has been accepted. 2250 * 2251 * The other way is to set zero length session ID when the 2252 * ticket is presented and rely on the handshake to determine 2253 * session resumption. 2254 * 2255 * We choose the former approach because this fits in with 2256 * assumptions elsewhere in OpenSSL. The session ID is set 2257 * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the 2258 * ticket. 2259 */ 2260 EVP_Digest(p, ticklen, 2261 s->session->session_id, &s->session->session_id_length, 2262#ifndef OPENSSL_NO_SHA256 2263 EVP_sha256(), NULL); 2264#else 2265 EVP_sha1(), NULL); 2266#endif 2267 ret=1; 2268 return(ret); 2269f_err: 2270 ssl3_send_alert(s,SSL3_AL_FATAL,al); 2271err: 2272 return(-1); 2273 } 2274 2275int ssl3_get_cert_status(SSL *s) 2276 { 2277 int ok, al; 2278 unsigned long resplen,n; 2279 const unsigned char *p; 2280 2281 n=s->method->ssl_get_message(s, 2282 SSL3_ST_CR_CERT_STATUS_A, 2283 SSL3_ST_CR_CERT_STATUS_B, 2284 SSL3_MT_CERTIFICATE_STATUS, 2285 16384, 2286 &ok); 2287 2288 if (!ok) return((int)n); 2289 if (n < 4) 2290 { 2291 /* need at least status type + length */ 2292 al = SSL_AD_DECODE_ERROR; 2293 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH); 2294 goto f_err; 2295 } 2296 p = (unsigned char *)s->init_msg; 2297 if (*p++ != TLSEXT_STATUSTYPE_ocsp) 2298 { 2299 al = SSL_AD_DECODE_ERROR; 2300 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_UNSUPPORTED_STATUS_TYPE); 2301 goto f_err; 2302 } 2303 n2l3(p, resplen); 2304 if (resplen + 4 != n) 2305 { 2306 al = SSL_AD_DECODE_ERROR; 2307 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH); 2308 goto f_err; 2309 } 2310 if (s->tlsext_ocsp_resp) 2311 OPENSSL_free(s->tlsext_ocsp_resp); 2312 s->tlsext_ocsp_resp = BUF_memdup(p, resplen); 2313 if (!s->tlsext_ocsp_resp) 2314 { 2315 al = SSL_AD_INTERNAL_ERROR; 2316 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE); 2317 goto f_err; 2318 } 2319 s->tlsext_ocsp_resplen = resplen; 2320 if (s->ctx->tlsext_status_cb) 2321 { 2322 int ret; 2323 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg); 2324 if (ret == 0) 2325 { 2326 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE; 2327 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_INVALID_STATUS_RESPONSE); 2328 goto f_err; 2329 } 2330 if (ret < 0) 2331 { 2332 al = SSL_AD_INTERNAL_ERROR; 2333 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE); 2334 goto f_err; 2335 } 2336 } 2337 return 1; 2338f_err: 2339 ssl3_send_alert(s,SSL3_AL_FATAL,al); 2340 return(-1); 2341 } 2342#endif 2343 2344int ssl3_get_server_done(SSL *s) 2345 { 2346 int ok,ret=0; 2347 long n; 2348 2349 n=s->method->ssl_get_message(s, 2350 SSL3_ST_CR_SRVR_DONE_A, 2351 SSL3_ST_CR_SRVR_DONE_B, 2352 SSL3_MT_SERVER_DONE, 2353 30, /* should be very small, like 0 :-) */ 2354 &ok); 2355 2356 if (!ok) return((int)n); 2357 if (n > 0) 2358 { 2359 /* should contain no data */ 2360 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 2361 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH); 2362 return -1; 2363 } 2364 ret=1; 2365 return(ret); 2366 } 2367 2368 2369int ssl3_send_client_key_exchange(SSL *s) 2370 { 2371 unsigned char *p,*d; 2372 int n; 2373 unsigned long alg_k; 2374#ifndef OPENSSL_NO_RSA 2375 unsigned char *q; 2376 EVP_PKEY *pkey=NULL; 2377#endif 2378#ifndef OPENSSL_NO_KRB5 2379 KSSL_ERR kssl_err; 2380#endif /* OPENSSL_NO_KRB5 */ 2381#ifndef OPENSSL_NO_ECDH 2382 EC_KEY *clnt_ecdh = NULL; 2383 const EC_POINT *srvr_ecpoint = NULL; 2384 EVP_PKEY *srvr_pub_pkey = NULL; 2385 unsigned char *encodedPoint = NULL; 2386 int encoded_pt_len = 0; 2387 BN_CTX * bn_ctx = NULL; 2388#endif 2389 2390 if (s->state == SSL3_ST_CW_KEY_EXCH_A) 2391 { 2392 d=(unsigned char *)s->init_buf->data; 2393 p= &(d[4]); 2394 2395 alg_k=s->s3->tmp.new_cipher->algorithm_mkey; 2396 2397 /* Fool emacs indentation */ 2398 if (0) {} 2399#ifndef OPENSSL_NO_RSA 2400 else if (alg_k & SSL_kRSA) 2401 { 2402 RSA *rsa; 2403 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; 2404 2405 if (s->session->sess_cert == NULL) 2406 { 2407 /* We should always have a server certificate with SSL_kRSA. */ 2408 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 2409 goto err; 2410 } 2411 2412 if (s->session->sess_cert->peer_rsa_tmp != NULL) 2413 rsa=s->session->sess_cert->peer_rsa_tmp; 2414 else 2415 { 2416 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 2417 if ((pkey == NULL) || 2418 (pkey->type != EVP_PKEY_RSA) || 2419 (pkey->pkey.rsa == NULL)) 2420 { 2421 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 2422 goto err; 2423 } 2424 rsa=pkey->pkey.rsa; 2425 EVP_PKEY_free(pkey); 2426 } 2427 2428 tmp_buf[0]=s->client_version>>8; 2429 tmp_buf[1]=s->client_version&0xff; 2430 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0) 2431 goto err; 2432 2433 s->session->master_key_length=sizeof tmp_buf; 2434 2435 q=p; 2436 /* Fix buf for TLS and beyond */ 2437 if (s->version > SSL3_VERSION) 2438 p+=2; 2439 n=RSA_public_encrypt(sizeof tmp_buf, 2440 tmp_buf,p,rsa,RSA_PKCS1_PADDING); 2441#ifdef PKCS1_CHECK 2442 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++; 2443 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70; 2444#endif 2445 if (n <= 0) 2446 { 2447 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT); 2448 goto err; 2449 } 2450 2451 /* Fix buf for TLS and beyond */ 2452 if (s->version > SSL3_VERSION) 2453 { 2454 s2n(n,q); 2455 n+=2; 2456 } 2457 2458 s->session->master_key_length= 2459 s->method->ssl3_enc->generate_master_secret(s, 2460 s->session->master_key, 2461 tmp_buf,sizeof tmp_buf); 2462 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf); 2463 } 2464#endif 2465#ifndef OPENSSL_NO_KRB5 2466 else if (alg_k & SSL_kKRB5) 2467 { 2468 krb5_error_code krb5rc; 2469 KSSL_CTX *kssl_ctx = s->kssl_ctx; 2470 /* krb5_data krb5_ap_req; */ 2471 krb5_data *enc_ticket; 2472 krb5_data authenticator, *authp = NULL; 2473 EVP_CIPHER_CTX ciph_ctx; 2474 const EVP_CIPHER *enc = NULL; 2475 unsigned char iv[EVP_MAX_IV_LENGTH]; 2476 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; 2477 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH 2478 + EVP_MAX_IV_LENGTH]; 2479 int padl, outl = sizeof(epms); 2480 2481 EVP_CIPHER_CTX_init(&ciph_ctx); 2482 2483#ifdef KSSL_DEBUG 2484 printf("ssl3_send_client_key_exchange(%lx & %lx)\n", 2485 alg_k, SSL_kKRB5); 2486#endif /* KSSL_DEBUG */ 2487 2488 authp = NULL; 2489#ifdef KRB5SENDAUTH 2490 if (KRB5SENDAUTH) authp = &authenticator; 2491#endif /* KRB5SENDAUTH */ 2492 2493 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp, 2494 &kssl_err); 2495 enc = kssl_map_enc(kssl_ctx->enctype); 2496 if (enc == NULL) 2497 goto err; 2498#ifdef KSSL_DEBUG 2499 { 2500 printf("kssl_cget_tkt rtn %d\n", krb5rc); 2501 if (krb5rc && kssl_err.text) 2502 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text); 2503 } 2504#endif /* KSSL_DEBUG */ 2505 2506 if (krb5rc) 2507 { 2508 ssl3_send_alert(s,SSL3_AL_FATAL, 2509 SSL_AD_HANDSHAKE_FAILURE); 2510 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2511 kssl_err.reason); 2512 goto err; 2513 } 2514 2515 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ 2516 ** in place of RFC 2712 KerberosWrapper, as in: 2517 ** 2518 ** Send ticket (copy to *p, set n = length) 2519 ** n = krb5_ap_req.length; 2520 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length); 2521 ** if (krb5_ap_req.data) 2522 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req); 2523 ** 2524 ** Now using real RFC 2712 KerberosWrapper 2525 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>) 2526 ** Note: 2712 "opaque" types are here replaced 2527 ** with a 2-byte length followed by the value. 2528 ** Example: 2529 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms 2530 ** Where "xx xx" = length bytes. Shown here with 2531 ** optional authenticator omitted. 2532 */ 2533 2534 /* KerberosWrapper.Ticket */ 2535 s2n(enc_ticket->length,p); 2536 memcpy(p, enc_ticket->data, enc_ticket->length); 2537 p+= enc_ticket->length; 2538 n = enc_ticket->length + 2; 2539 2540 /* KerberosWrapper.Authenticator */ 2541 if (authp && authp->length) 2542 { 2543 s2n(authp->length,p); 2544 memcpy(p, authp->data, authp->length); 2545 p+= authp->length; 2546 n+= authp->length + 2; 2547 2548 free(authp->data); 2549 authp->data = NULL; 2550 authp->length = 0; 2551 } 2552 else 2553 { 2554 s2n(0,p);/* null authenticator length */ 2555 n+=2; 2556 } 2557 2558 tmp_buf[0]=s->client_version>>8; 2559 tmp_buf[1]=s->client_version&0xff; 2560 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0) 2561 goto err; 2562 2563 /* 20010420 VRS. Tried it this way; failed. 2564 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL); 2565 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx, 2566 ** kssl_ctx->length); 2567 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv); 2568 */ 2569 2570 memset(iv, 0, sizeof iv); /* per RFC 1510 */ 2571 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL, 2572 kssl_ctx->key,iv); 2573 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf, 2574 sizeof tmp_buf); 2575 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl); 2576 outl += padl; 2577 if (outl > (int)sizeof epms) 2578 { 2579 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); 2580 goto err; 2581 } 2582 EVP_CIPHER_CTX_cleanup(&ciph_ctx); 2583 2584 /* KerberosWrapper.EncryptedPreMasterSecret */ 2585 s2n(outl,p); 2586 memcpy(p, epms, outl); 2587 p+=outl; 2588 n+=outl + 2; 2589 2590 s->session->master_key_length= 2591 s->method->ssl3_enc->generate_master_secret(s, 2592 s->session->master_key, 2593 tmp_buf, sizeof tmp_buf); 2594 2595 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf); 2596 OPENSSL_cleanse(epms, outl); 2597 } 2598#endif 2599#ifndef OPENSSL_NO_DH 2600 else if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) 2601 { 2602 DH *dh_srvr,*dh_clnt; 2603 2604 if (s->session->sess_cert == NULL) 2605 { 2606 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 2607 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE); 2608 goto err; 2609 } 2610 2611 if (s->session->sess_cert->peer_dh_tmp != NULL) 2612 dh_srvr=s->session->sess_cert->peer_dh_tmp; 2613 else 2614 { 2615 /* we get them from the cert */ 2616 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); 2617 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS); 2618 goto err; 2619 } 2620 2621 /* generate a new random key */ 2622 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL) 2623 { 2624 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 2625 goto err; 2626 } 2627 if (!DH_generate_key(dh_clnt)) 2628 { 2629 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 2630 DH_free(dh_clnt); 2631 goto err; 2632 } 2633 2634 /* use the 'p' output buffer for the DH key, but 2635 * make sure to clear it out afterwards */ 2636 2637 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt); 2638 2639 if (n <= 0) 2640 { 2641 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 2642 DH_free(dh_clnt); 2643 goto err; 2644 } 2645 2646 /* generate master key from the result */ 2647 s->session->master_key_length= 2648 s->method->ssl3_enc->generate_master_secret(s, 2649 s->session->master_key,p,n); 2650 /* clean up */ 2651 memset(p,0,n); 2652 2653 /* send off the data */ 2654 n=BN_num_bytes(dh_clnt->pub_key); 2655 s2n(n,p); 2656 BN_bn2bin(dh_clnt->pub_key,p); 2657 n+=2; 2658 2659 DH_free(dh_clnt); 2660 2661 /* perhaps clean things up a bit EAY EAY EAY EAY*/ 2662 } 2663#endif 2664 2665#ifndef OPENSSL_NO_ECDH 2666 else if (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)) 2667 { 2668 const EC_GROUP *srvr_group = NULL; 2669 EC_KEY *tkey; 2670 int ecdh_clnt_cert = 0; 2671 int field_size = 0; 2672 2673 if (s->session->sess_cert == NULL) 2674 { 2675 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 2676 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE); 2677 goto err; 2678 } 2679 2680 /* Did we send out the client's 2681 * ECDH share for use in premaster 2682 * computation as part of client certificate? 2683 * If so, set ecdh_clnt_cert to 1. 2684 */ 2685 if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL)) 2686 { 2687 /* XXX: For now, we do not support client 2688 * authentication using ECDH certificates. 2689 * To add such support, one needs to add 2690 * code that checks for appropriate 2691 * conditions and sets ecdh_clnt_cert to 1. 2692 * For example, the cert have an ECC 2693 * key on the same curve as the server's 2694 * and the key should be authorized for 2695 * key agreement. 2696 * 2697 * One also needs to add code in ssl3_connect 2698 * to skip sending the certificate verify 2699 * message. 2700 * 2701 * if ((s->cert->key->privatekey != NULL) && 2702 * (s->cert->key->privatekey->type == 2703 * EVP_PKEY_EC) && ...) 2704 * ecdh_clnt_cert = 1; 2705 */ 2706 } 2707 2708 if (s->session->sess_cert->peer_ecdh_tmp != NULL) 2709 { 2710 tkey = s->session->sess_cert->peer_ecdh_tmp; 2711 } 2712 else 2713 { 2714 /* Get the Server Public Key from Cert */ 2715 srvr_pub_pkey = X509_get_pubkey(s->session-> \ 2716 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509); 2717 if ((srvr_pub_pkey == NULL) || 2718 (srvr_pub_pkey->type != EVP_PKEY_EC) || 2719 (srvr_pub_pkey->pkey.ec == NULL)) 2720 { 2721 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2722 ERR_R_INTERNAL_ERROR); 2723 goto err; 2724 } 2725 2726 tkey = srvr_pub_pkey->pkey.ec; 2727 } 2728 2729 srvr_group = EC_KEY_get0_group(tkey); 2730 srvr_ecpoint = EC_KEY_get0_public_key(tkey); 2731 2732 if ((srvr_group == NULL) || (srvr_ecpoint == NULL)) 2733 { 2734 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2735 ERR_R_INTERNAL_ERROR); 2736 goto err; 2737 } 2738 2739 if ((clnt_ecdh=EC_KEY_new()) == NULL) 2740 { 2741 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2742 goto err; 2743 } 2744 2745 if (!EC_KEY_set_group(clnt_ecdh, srvr_group)) 2746 { 2747 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB); 2748 goto err; 2749 } 2750 if (ecdh_clnt_cert) 2751 { 2752 /* Reuse key info from our certificate 2753 * We only need our private key to perform 2754 * the ECDH computation. 2755 */ 2756 const BIGNUM *priv_key; 2757 tkey = s->cert->key->privatekey->pkey.ec; 2758 priv_key = EC_KEY_get0_private_key(tkey); 2759 if (priv_key == NULL) 2760 { 2761 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2762 goto err; 2763 } 2764 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key)) 2765 { 2766 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB); 2767 goto err; 2768 } 2769 } 2770 else 2771 { 2772 /* Generate a new ECDH key pair */ 2773 if (!(EC_KEY_generate_key(clnt_ecdh))) 2774 { 2775 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB); 2776 goto err; 2777 } 2778 } 2779 2780 /* use the 'p' output buffer for the ECDH key, but 2781 * make sure to clear it out afterwards 2782 */ 2783 2784 field_size = EC_GROUP_get_degree(srvr_group); 2785 if (field_size <= 0) 2786 { 2787 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2788 ERR_R_ECDH_LIB); 2789 goto err; 2790 } 2791 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL); 2792 if (n <= 0) 2793 { 2794 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2795 ERR_R_ECDH_LIB); 2796 goto err; 2797 } 2798 2799 /* generate master key from the result */ 2800 s->session->master_key_length = s->method->ssl3_enc \ 2801 -> generate_master_secret(s, 2802 s->session->master_key, 2803 p, n); 2804 2805 memset(p, 0, n); /* clean up */ 2806 2807 if (ecdh_clnt_cert) 2808 { 2809 /* Send empty client key exch message */ 2810 n = 0; 2811 } 2812 else 2813 { 2814 /* First check the size of encoding and 2815 * allocate memory accordingly. 2816 */ 2817 encoded_pt_len = 2818 EC_POINT_point2oct(srvr_group, 2819 EC_KEY_get0_public_key(clnt_ecdh), 2820 POINT_CONVERSION_UNCOMPRESSED, 2821 NULL, 0, NULL); 2822 2823 encodedPoint = (unsigned char *) 2824 OPENSSL_malloc(encoded_pt_len * 2825 sizeof(unsigned char)); 2826 bn_ctx = BN_CTX_new(); 2827 if ((encodedPoint == NULL) || 2828 (bn_ctx == NULL)) 2829 { 2830 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2831 goto err; 2832 } 2833 2834 /* Encode the public key */ 2835 n = EC_POINT_point2oct(srvr_group, 2836 EC_KEY_get0_public_key(clnt_ecdh), 2837 POINT_CONVERSION_UNCOMPRESSED, 2838 encodedPoint, encoded_pt_len, bn_ctx); 2839 2840 *p = n; /* length of encoded point */ 2841 /* Encoded point will be copied here */ 2842 p += 1; 2843 /* copy the point */ 2844 memcpy((unsigned char *)p, encodedPoint, n); 2845 /* increment n to account for length field */ 2846 n += 1; 2847 } 2848 2849 /* Free allocated memory */ 2850 BN_CTX_free(bn_ctx); 2851 if (encodedPoint != NULL) OPENSSL_free(encodedPoint); 2852 if (clnt_ecdh != NULL) 2853 EC_KEY_free(clnt_ecdh); 2854 EVP_PKEY_free(srvr_pub_pkey); 2855 } 2856#endif /* !OPENSSL_NO_ECDH */ 2857 else if (alg_k & SSL_kGOST) 2858 { 2859 /* GOST key exchange message creation */ 2860 EVP_PKEY_CTX *pkey_ctx; 2861 X509 *peer_cert; 2862 size_t msglen; 2863 unsigned int md_len; 2864 int keytype; 2865 unsigned char premaster_secret[32],shared_ukm[32], tmp[256]; 2866 EVP_MD_CTX *ukm_hash; 2867 EVP_PKEY *pub_key; 2868 2869 /* Get server sertificate PKEY and create ctx from it */ 2870 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST01)].x509; 2871 if (!peer_cert) 2872 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST94)].x509; 2873 if (!peer_cert) { 2874 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER); 2875 goto err; 2876 } 2877 2878 pkey_ctx=EVP_PKEY_CTX_new(pub_key=X509_get_pubkey(peer_cert),NULL); 2879 /* If we have send a certificate, and certificate key 2880 2881 * parameters match those of server certificate, use 2882 * certificate key for key exchange 2883 */ 2884 2885 /* Otherwise, generate ephemeral key pair */ 2886 2887 EVP_PKEY_encrypt_init(pkey_ctx); 2888 /* Generate session key */ 2889 RAND_bytes(premaster_secret,32); 2890 /* If we have client certificate, use its secret as peer key */ 2891 if (s->s3->tmp.cert_req && s->cert->key->privatekey) { 2892 if (EVP_PKEY_derive_set_peer(pkey_ctx,s->cert->key->privatekey) <=0) { 2893 /* If there was an error - just ignore it. Ephemeral key 2894 * would be used 2895 */ 2896 ERR_clear_error(); 2897 } 2898 } 2899 /* Compute shared IV and store it in algorithm-specific 2900 * context data */ 2901 ukm_hash = EVP_MD_CTX_create(); 2902 EVP_DigestInit(ukm_hash,EVP_get_digestbynid(NID_id_GostR3411_94)); 2903 EVP_DigestUpdate(ukm_hash,s->s3->client_random,SSL3_RANDOM_SIZE); 2904 EVP_DigestUpdate(ukm_hash,s->s3->server_random,SSL3_RANDOM_SIZE); 2905 EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len); 2906 EVP_MD_CTX_destroy(ukm_hash); 2907 if (EVP_PKEY_CTX_ctrl(pkey_ctx,-1,EVP_PKEY_OP_ENCRYPT,EVP_PKEY_CTRL_SET_IV, 2908 8,shared_ukm)<0) { 2909 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2910 SSL_R_LIBRARY_BUG); 2911 goto err; 2912 } 2913 /* Make GOST keytransport blob message */ 2914 /*Encapsulate it into sequence */ 2915 *(p++)=V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED; 2916 msglen=255; 2917 if (EVP_PKEY_encrypt(pkey_ctx,tmp,&msglen,premaster_secret,32)<0) { 2918 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2919 SSL_R_LIBRARY_BUG); 2920 goto err; 2921 } 2922 if (msglen >= 0x80) 2923 { 2924 *(p++)=0x81; 2925 *(p++)= msglen & 0xff; 2926 n=msglen+3; 2927 } 2928 else 2929 { 2930 *(p++)= msglen & 0xff; 2931 n=msglen+2; 2932 } 2933 memcpy(p, tmp, msglen); 2934 /* Check if pubkey from client certificate was used */ 2935 if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0) 2936 { 2937 /* Set flag "skip certificate verify" */ 2938 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY; 2939 } 2940 EVP_PKEY_CTX_free(pkey_ctx); 2941 s->session->master_key_length= 2942 s->method->ssl3_enc->generate_master_secret(s, 2943 s->session->master_key,premaster_secret,32); 2944 EVP_PKEY_free(pub_key); 2945 2946 } 2947#ifndef OPENSSL_NO_SRP 2948 else if (alg_k & SSL_kSRP) 2949 { 2950 if (s->srp_ctx.A != NULL) 2951 { 2952 /* send off the data */ 2953 n=BN_num_bytes(s->srp_ctx.A); 2954 s2n(n,p); 2955 BN_bn2bin(s->srp_ctx.A,p); 2956 n+=2; 2957 } 2958 else 2959 { 2960 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 2961 goto err; 2962 } 2963 if (s->session->srp_username != NULL) 2964 OPENSSL_free(s->session->srp_username); 2965 s->session->srp_username = BUF_strdup(s->srp_ctx.login); 2966 if (s->session->srp_username == NULL) 2967 { 2968 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2969 ERR_R_MALLOC_FAILURE); 2970 goto err; 2971 } 2972 2973 if ((s->session->master_key_length = SRP_generate_client_master_secret(s,s->session->master_key))<0) 2974 { 2975 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 2976 goto err; 2977 } 2978 } 2979#endif 2980#ifndef OPENSSL_NO_PSK 2981 else if (alg_k & SSL_kPSK) 2982 { 2983 /* The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes 2984 * to return a \0-terminated identity. The last byte 2985 * is for us for simulating strnlen. */ 2986 char identity[PSK_MAX_IDENTITY_LEN + 2]; 2987 size_t identity_len; 2988 unsigned char *t = NULL; 2989 unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4]; 2990 unsigned int pre_ms_len = 0, psk_len = 0; 2991 int psk_err = 1; 2992 2993 n = 0; 2994 if (s->psk_client_callback == NULL) 2995 { 2996 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2997 SSL_R_PSK_NO_CLIENT_CB); 2998 goto err; 2999 } 3000 3001 memset(identity, 0, sizeof(identity)); 3002 psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint, 3003 identity, sizeof(identity) - 1, 3004 psk_or_pre_ms, sizeof(psk_or_pre_ms)); 3005 if (psk_len > PSK_MAX_PSK_LEN) 3006 { 3007 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 3008 ERR_R_INTERNAL_ERROR); 3009 goto psk_err; 3010 } 3011 else if (psk_len == 0) 3012 { 3013 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 3014 SSL_R_PSK_IDENTITY_NOT_FOUND); 3015 goto psk_err; 3016 } 3017 identity[PSK_MAX_IDENTITY_LEN + 1] = '\0'; 3018 identity_len = strlen(identity); 3019 if (identity_len > PSK_MAX_IDENTITY_LEN) 3020 { 3021 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 3022 ERR_R_INTERNAL_ERROR); 3023 goto psk_err; 3024 } 3025 /* create PSK pre_master_secret */ 3026 pre_ms_len = 2+psk_len+2+psk_len; 3027 t = psk_or_pre_ms; 3028 memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len); 3029 s2n(psk_len, t); 3030 memset(t, 0, psk_len); 3031 t+=psk_len; 3032 s2n(psk_len, t); 3033 3034 if (s->session->psk_identity_hint != NULL) 3035 OPENSSL_free(s->session->psk_identity_hint); 3036 s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint); 3037 if (s->ctx->psk_identity_hint != NULL && 3038 s->session->psk_identity_hint == NULL) 3039 { 3040 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 3041 ERR_R_MALLOC_FAILURE); 3042 goto psk_err; 3043 } 3044 3045 if (s->session->psk_identity != NULL) 3046 OPENSSL_free(s->session->psk_identity); 3047 s->session->psk_identity = BUF_strdup(identity); 3048 if (s->session->psk_identity == NULL) 3049 { 3050 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 3051 ERR_R_MALLOC_FAILURE); 3052 goto psk_err; 3053 } 3054 3055 s->session->master_key_length = 3056 s->method->ssl3_enc->generate_master_secret(s, 3057 s->session->master_key, 3058 psk_or_pre_ms, pre_ms_len); 3059 s2n(identity_len, p); 3060 memcpy(p, identity, identity_len); 3061 n = 2 + identity_len; 3062 psk_err = 0; 3063 psk_err: 3064 OPENSSL_cleanse(identity, sizeof(identity)); 3065 OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms)); 3066 if (psk_err != 0) 3067 { 3068 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); 3069 goto err; 3070 } 3071 } 3072#endif 3073 else 3074 { 3075 ssl3_send_alert(s, SSL3_AL_FATAL, 3076 SSL_AD_HANDSHAKE_FAILURE); 3077 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 3078 ERR_R_INTERNAL_ERROR); 3079 goto err; 3080 } 3081 3082 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE; 3083 l2n3(n,d); 3084 3085 s->state=SSL3_ST_CW_KEY_EXCH_B; 3086 /* number of bytes to write */ 3087 s->init_num=n+4; 3088 s->init_off=0; 3089 } 3090 3091 /* SSL3_ST_CW_KEY_EXCH_B */ 3092 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 3093err: 3094#ifndef OPENSSL_NO_ECDH 3095 BN_CTX_free(bn_ctx); 3096 if (encodedPoint != NULL) OPENSSL_free(encodedPoint); 3097 if (clnt_ecdh != NULL) 3098 EC_KEY_free(clnt_ecdh); 3099 EVP_PKEY_free(srvr_pub_pkey); 3100#endif 3101 return(-1); 3102 } 3103 3104int ssl3_send_client_verify(SSL *s) 3105 { 3106 unsigned char *p,*d; 3107 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH]; 3108 EVP_PKEY *pkey; 3109 EVP_PKEY_CTX *pctx=NULL; 3110 EVP_MD_CTX mctx; 3111 unsigned u=0; 3112 unsigned long n; 3113 int j; 3114 3115 EVP_MD_CTX_init(&mctx); 3116 3117 if (s->state == SSL3_ST_CW_CERT_VRFY_A) 3118 { 3119 d=(unsigned char *)s->init_buf->data; 3120 p= &(d[4]); 3121 pkey=s->cert->key->privatekey; 3122/* Create context from key and test if sha1 is allowed as digest */ 3123 pctx = EVP_PKEY_CTX_new(pkey,NULL); 3124 EVP_PKEY_sign_init(pctx); 3125 if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1())>0) 3126 { 3127 if (TLS1_get_version(s) < TLS1_2_VERSION) 3128 s->method->ssl3_enc->cert_verify_mac(s, 3129 NID_sha1, 3130 &(data[MD5_DIGEST_LENGTH])); 3131 } 3132 else 3133 { 3134 ERR_clear_error(); 3135 } 3136 /* For TLS v1.2 send signature algorithm and signature 3137 * using agreed digest and cached handshake records. 3138 */ 3139 if (TLS1_get_version(s) >= TLS1_2_VERSION) 3140 { 3141 long hdatalen = 0; 3142 void *hdata; 3143 const EVP_MD *md = s->cert->key->digest; 3144 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, 3145 &hdata); 3146 if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md)) 3147 { 3148 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, 3149 ERR_R_INTERNAL_ERROR); 3150 goto err; 3151 } 3152 p += 2; 3153#ifdef SSL_DEBUG 3154 fprintf(stderr, "Using TLS 1.2 with client alg %s\n", 3155 EVP_MD_name(md)); 3156#endif 3157 if (!EVP_SignInit_ex(&mctx, md, NULL) 3158 || !EVP_SignUpdate(&mctx, hdata, hdatalen) 3159 || !EVP_SignFinal(&mctx, p + 2, &u, pkey)) 3160 { 3161 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, 3162 ERR_R_EVP_LIB); 3163 goto err; 3164 } 3165 s2n(u,p); 3166 n = u + 4; 3167 if (!ssl3_digest_cached_records(s)) 3168 goto err; 3169 } 3170 else 3171#ifndef OPENSSL_NO_RSA 3172 if (pkey->type == EVP_PKEY_RSA) 3173 { 3174 s->method->ssl3_enc->cert_verify_mac(s, 3175 NID_md5, 3176 &(data[0])); 3177 if (RSA_sign(NID_md5_sha1, data, 3178 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH, 3179 &(p[2]), &u, pkey->pkey.rsa) <= 0 ) 3180 { 3181 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB); 3182 goto err; 3183 } 3184 s2n(u,p); 3185 n=u+2; 3186 } 3187 else 3188#endif 3189#ifndef OPENSSL_NO_DSA 3190 if (pkey->type == EVP_PKEY_DSA) 3191 { 3192 if (!DSA_sign(pkey->save_type, 3193 &(data[MD5_DIGEST_LENGTH]), 3194 SHA_DIGEST_LENGTH,&(p[2]), 3195 (unsigned int *)&j,pkey->pkey.dsa)) 3196 { 3197 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB); 3198 goto err; 3199 } 3200 s2n(j,p); 3201 n=j+2; 3202 } 3203 else 3204#endif 3205#ifndef OPENSSL_NO_ECDSA 3206 if (pkey->type == EVP_PKEY_EC) 3207 { 3208 if (!ECDSA_sign(pkey->save_type, 3209 &(data[MD5_DIGEST_LENGTH]), 3210 SHA_DIGEST_LENGTH,&(p[2]), 3211 (unsigned int *)&j,pkey->pkey.ec)) 3212 { 3213 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, 3214 ERR_R_ECDSA_LIB); 3215 goto err; 3216 } 3217 s2n(j,p); 3218 n=j+2; 3219 } 3220 else 3221#endif 3222 if (pkey->type == NID_id_GostR3410_94 || pkey->type == NID_id_GostR3410_2001) 3223 { 3224 unsigned char signbuf[64]; 3225 int i; 3226 size_t sigsize=64; 3227 s->method->ssl3_enc->cert_verify_mac(s, 3228 NID_id_GostR3411_94, 3229 data); 3230 if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) { 3231 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, 3232 ERR_R_INTERNAL_ERROR); 3233 goto err; 3234 } 3235 for (i=63,j=0; i>=0; j++, i--) { 3236 p[2+j]=signbuf[i]; 3237 } 3238 s2n(j,p); 3239 n=j+2; 3240 } 3241 else 3242 { 3243 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR); 3244 goto err; 3245 } 3246 *(d++)=SSL3_MT_CERTIFICATE_VERIFY; 3247 l2n3(n,d); 3248 3249 s->state=SSL3_ST_CW_CERT_VRFY_B; 3250 s->init_num=(int)n+4; 3251 s->init_off=0; 3252 } 3253 EVP_MD_CTX_cleanup(&mctx); 3254 EVP_PKEY_CTX_free(pctx); 3255 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 3256err: 3257 EVP_MD_CTX_cleanup(&mctx); 3258 EVP_PKEY_CTX_free(pctx); 3259 return(-1); 3260 } 3261 3262int ssl3_send_client_certificate(SSL *s) 3263 { 3264 X509 *x509=NULL; 3265 EVP_PKEY *pkey=NULL; 3266 int i; 3267 unsigned long l; 3268 3269 if (s->state == SSL3_ST_CW_CERT_A) 3270 { 3271 if ((s->cert == NULL) || 3272 (s->cert->key->x509 == NULL) || 3273 (s->cert->key->privatekey == NULL)) 3274 s->state=SSL3_ST_CW_CERT_B; 3275 else 3276 s->state=SSL3_ST_CW_CERT_C; 3277 } 3278 3279 /* We need to get a client cert */ 3280 if (s->state == SSL3_ST_CW_CERT_B) 3281 { 3282 /* If we get an error, we need to 3283 * ssl->rwstate=SSL_X509_LOOKUP; return(-1); 3284 * We then get retied later */ 3285 i=0; 3286 i = ssl_do_client_cert_cb(s, &x509, &pkey); 3287 if (i < 0) 3288 { 3289 s->rwstate=SSL_X509_LOOKUP; 3290 return(-1); 3291 } 3292 s->rwstate=SSL_NOTHING; 3293 if ((i == 1) && (pkey != NULL) && (x509 != NULL)) 3294 { 3295 s->state=SSL3_ST_CW_CERT_B; 3296 if ( !SSL_use_certificate(s,x509) || 3297 !SSL_use_PrivateKey(s,pkey)) 3298 i=0; 3299 } 3300 else if (i == 1) 3301 { 3302 i=0; 3303 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); 3304 } 3305 3306 if (x509 != NULL) X509_free(x509); 3307 if (pkey != NULL) EVP_PKEY_free(pkey); 3308 if (i == 0) 3309 { 3310 if (s->version == SSL3_VERSION) 3311 { 3312 s->s3->tmp.cert_req=0; 3313 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE); 3314 return(1); 3315 } 3316 else 3317 { 3318 s->s3->tmp.cert_req=2; 3319 } 3320 } 3321 3322 /* Ok, we have a cert */ 3323 s->state=SSL3_ST_CW_CERT_C; 3324 } 3325 3326 if (s->state == SSL3_ST_CW_CERT_C) 3327 { 3328 s->state=SSL3_ST_CW_CERT_D; 3329 l=ssl3_output_cert_chain(s, 3330 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509); 3331 s->init_num=(int)l; 3332 s->init_off=0; 3333 } 3334 /* SSL3_ST_CW_CERT_D */ 3335 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 3336 } 3337 3338#define has_bits(i,m) (((i)&(m)) == (m)) 3339 3340int ssl3_check_cert_and_algorithm(SSL *s) 3341 { 3342 int i,idx; 3343 long alg_k,alg_a; 3344 EVP_PKEY *pkey=NULL; 3345 SESS_CERT *sc; 3346#ifndef OPENSSL_NO_RSA 3347 RSA *rsa; 3348#endif 3349#ifndef OPENSSL_NO_DH 3350 DH *dh; 3351#endif 3352 3353 alg_k=s->s3->tmp.new_cipher->algorithm_mkey; 3354 alg_a=s->s3->tmp.new_cipher->algorithm_auth; 3355 3356 /* we don't have a certificate */ 3357 if ((alg_a & (SSL_aDH|SSL_aNULL|SSL_aKRB5)) || (alg_k & SSL_kPSK)) 3358 return(1); 3359 3360 sc=s->session->sess_cert; 3361 if (sc == NULL) 3362 { 3363 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR); 3364 goto err; 3365 } 3366 3367#ifndef OPENSSL_NO_RSA 3368 rsa=s->session->sess_cert->peer_rsa_tmp; 3369#endif 3370#ifndef OPENSSL_NO_DH 3371 dh=s->session->sess_cert->peer_dh_tmp; 3372#endif 3373 3374 /* This is the passed certificate */ 3375 3376 idx=sc->peer_cert_type; 3377#ifndef OPENSSL_NO_ECDH 3378 if (idx == SSL_PKEY_ECC) 3379 { 3380 if (ssl_check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509, 3381 s) == 0) 3382 { /* check failed */ 3383 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT); 3384 goto f_err; 3385 } 3386 else 3387 { 3388 return 1; 3389 } 3390 } 3391#endif 3392 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509); 3393 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey); 3394 EVP_PKEY_free(pkey); 3395 3396 3397 /* Check that we have a certificate if we require one */ 3398 if ((alg_a & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN)) 3399 { 3400 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT); 3401 goto f_err; 3402 } 3403#ifndef OPENSSL_NO_DSA 3404 else if ((alg_a & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN)) 3405 { 3406 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT); 3407 goto f_err; 3408 } 3409#endif 3410#ifndef OPENSSL_NO_RSA 3411 if ((alg_k & SSL_kRSA) && 3412 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL))) 3413 { 3414 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT); 3415 goto f_err; 3416 } 3417#endif 3418#ifndef OPENSSL_NO_DH 3419 if ((alg_k & SSL_kEDH) && 3420 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL))) 3421 { 3422 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY); 3423 goto f_err; 3424 } 3425 else if ((alg_k & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA)) 3426 { 3427 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT); 3428 goto f_err; 3429 } 3430#ifndef OPENSSL_NO_DSA 3431 else if ((alg_k & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA)) 3432 { 3433 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT); 3434 goto f_err; 3435 } 3436#endif 3437#endif 3438 3439 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP)) 3440 { 3441#ifndef OPENSSL_NO_RSA 3442 if (alg_k & SSL_kRSA) 3443 { 3444 if (rsa == NULL 3445 || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) 3446 { 3447 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY); 3448 goto f_err; 3449 } 3450 } 3451 else 3452#endif 3453#ifndef OPENSSL_NO_DH 3454 if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) 3455 { 3456 if (dh == NULL 3457 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) 3458 { 3459 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY); 3460 goto f_err; 3461 } 3462 } 3463 else 3464#endif 3465 { 3466 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE); 3467 goto f_err; 3468 } 3469 } 3470 return(1); 3471f_err: 3472 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); 3473err: 3474 return(0); 3475 } 3476 3477#if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG) 3478int ssl3_send_next_proto(SSL *s) 3479 { 3480 unsigned int len, padding_len; 3481 unsigned char *d; 3482 3483 if (s->state == SSL3_ST_CW_NEXT_PROTO_A) 3484 { 3485 len = s->next_proto_negotiated_len; 3486 padding_len = 32 - ((len + 2) % 32); 3487 d = (unsigned char *)s->init_buf->data; 3488 d[4] = len; 3489 memcpy(d + 5, s->next_proto_negotiated, len); 3490 d[5 + len] = padding_len; 3491 memset(d + 6 + len, 0, padding_len); 3492 *(d++)=SSL3_MT_NEXT_PROTO; 3493 l2n3(2 + len + padding_len, d); 3494 s->state = SSL3_ST_CW_NEXT_PROTO_B; 3495 s->init_num = 4 + 2 + len + padding_len; 3496 s->init_off = 0; 3497 } 3498 3499 return ssl3_do_write(s, SSL3_RT_HANDSHAKE); 3500} 3501#endif /* !OPENSSL_NO_TLSEXT && !OPENSSL_NO_NEXTPROTONEG */ 3502 3503/* Check to see if handshake is full or resumed. Usually this is just a 3504 * case of checking to see if a cache hit has occurred. In the case of 3505 * session tickets we have to check the next message to be sure. 3506 */ 3507 3508#ifndef OPENSSL_NO_TLSEXT 3509int ssl3_check_finished(SSL *s) 3510 { 3511 int ok; 3512 long n; 3513 /* If we have no ticket it cannot be a resumed session. */ 3514 if (!s->session->tlsext_tick) 3515 return 1; 3516 /* this function is called when we really expect a Certificate 3517 * message, so permit appropriate message length */ 3518 n=s->method->ssl_get_message(s, 3519 SSL3_ST_CR_CERT_A, 3520 SSL3_ST_CR_CERT_B, 3521 -1, 3522 s->max_cert_list, 3523 &ok); 3524 if (!ok) return((int)n); 3525 s->s3->tmp.reuse_message = 1; 3526 if ((s->s3->tmp.message_type == SSL3_MT_FINISHED) 3527 || (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET)) 3528 return 2; 3529 3530 return 1; 3531 } 3532#endif 3533 3534int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey) 3535 { 3536 int i = 0; 3537#ifndef OPENSSL_NO_ENGINE 3538 if (s->ctx->client_cert_engine) 3539 { 3540 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s, 3541 SSL_get_client_CA_list(s), 3542 px509, ppkey, NULL, NULL, NULL); 3543 if (i != 0) 3544 return i; 3545 } 3546#endif 3547 if (s->ctx->client_cert_cb) 3548 i = s->ctx->client_cert_cb(s,px509,ppkey); 3549 return i; 3550 } 3551