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// BEGIN android-added 219#if 0 220/* Send app data in separate packet, otherwise, some particular site 221 * (only one site so far) closes the socket. http://b/2511073 222 * Note: there is a very small chance that two TCP packets 223 * could be arriving at server combined into a single TCP packet, 224 * then trigger that site to break. We haven't encounter that though. 225 */ 226// END android-added 227 if (SSL_get_mode(s) & SSL_MODE_HANDSHAKE_CUTTHROUGH) 228 { 229 /* Send app data along with CCS/Finished */ 230 s->s3->flags |= SSL3_FLAGS_DELAY_CLIENT_FINISHED; 231 } 232 233// BEGIN android-added 234#endif 235// END android-added 236 for (;;) 237 { 238 state=s->state; 239 240 switch(s->state) 241 { 242 case SSL_ST_RENEGOTIATE: 243 s->renegotiate=1; 244 s->state=SSL_ST_CONNECT; 245 s->ctx->stats.sess_connect_renegotiate++; 246 /* break */ 247 case SSL_ST_BEFORE: 248 case SSL_ST_CONNECT: 249 case SSL_ST_BEFORE|SSL_ST_CONNECT: 250 case SSL_ST_OK|SSL_ST_CONNECT: 251 252 s->server=0; 253 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1); 254 255 if ((s->version & 0xff00 ) != 0x0300) 256 { 257 SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR); 258 ret = -1; 259 goto end; 260 } 261 262 /* s->version=SSL3_VERSION; */ 263 s->type=SSL_ST_CONNECT; 264 265 if (s->init_buf == NULL) 266 { 267 if ((buf=BUF_MEM_new()) == NULL) 268 { 269 ret= -1; 270 goto end; 271 } 272 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH)) 273 { 274 ret= -1; 275 goto end; 276 } 277 s->init_buf=buf; 278 buf=NULL; 279 } 280 281 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; } 282 283 /* setup buffing BIO */ 284 if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; } 285 286 /* don't push the buffering BIO quite yet */ 287 288 ssl3_init_finished_mac(s); 289 290 s->state=SSL3_ST_CW_CLNT_HELLO_A; 291 s->ctx->stats.sess_connect++; 292 s->init_num=0; 293 break; 294 295 case SSL3_ST_CW_CLNT_HELLO_A: 296 case SSL3_ST_CW_CLNT_HELLO_B: 297 298 s->shutdown=0; 299 ret=ssl3_client_hello(s); 300 if (ret <= 0) goto end; 301 s->state=SSL3_ST_CR_SRVR_HELLO_A; 302 s->init_num=0; 303 304 /* turn on buffering for the next lot of output */ 305 if (s->bbio != s->wbio) 306 s->wbio=BIO_push(s->bbio,s->wbio); 307 308 break; 309 310 case SSL3_ST_CR_SRVR_HELLO_A: 311 case SSL3_ST_CR_SRVR_HELLO_B: 312 ret=ssl3_get_server_hello(s); 313 if (ret <= 0) goto end; 314 315 if (s->hit) 316 { 317 s->state=SSL3_ST_CR_FINISHED_A; 318#ifndef OPENSSL_NO_TLSEXT 319 if (s->tlsext_ticket_expected) 320 { 321 /* receive renewed session ticket */ 322 s->state=SSL3_ST_CR_SESSION_TICKET_A; 323 } 324#endif 325 } 326 else 327 s->state=SSL3_ST_CR_CERT_A; 328 s->init_num=0; 329 break; 330 331 case SSL3_ST_CR_CERT_A: 332 case SSL3_ST_CR_CERT_B: 333#ifndef OPENSSL_NO_TLSEXT 334 ret=ssl3_check_finished(s); 335 if (ret <= 0) goto end; 336 if (ret == 2) 337 { 338 s->hit = 1; 339 if (s->tlsext_ticket_expected) 340 s->state=SSL3_ST_CR_SESSION_TICKET_A; 341 else 342 s->state=SSL3_ST_CR_FINISHED_A; 343 s->init_num=0; 344 break; 345 } 346#endif 347 /* Check if it is anon DH/ECDH */ 348 /* or PSK */ 349 if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) && 350 !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) 351 { 352 ret=ssl3_get_server_certificate(s); 353 if (ret <= 0) goto end; 354#ifndef OPENSSL_NO_TLSEXT 355 if (s->tlsext_status_expected) 356 s->state=SSL3_ST_CR_CERT_STATUS_A; 357 else 358 s->state=SSL3_ST_CR_KEY_EXCH_A; 359 } 360 else 361 { 362 skip = 1; 363 s->state=SSL3_ST_CR_KEY_EXCH_A; 364 } 365#else 366 } 367 else 368 skip=1; 369 370 s->state=SSL3_ST_CR_KEY_EXCH_A; 371#endif 372 s->init_num=0; 373 break; 374 375 case SSL3_ST_CR_KEY_EXCH_A: 376 case SSL3_ST_CR_KEY_EXCH_B: 377 ret=ssl3_get_key_exchange(s); 378 if (ret <= 0) goto end; 379 s->state=SSL3_ST_CR_CERT_REQ_A; 380 s->init_num=0; 381 382 /* at this point we check that we have the 383 * required stuff from the server */ 384 if (!ssl3_check_cert_and_algorithm(s)) 385 { 386 ret= -1; 387 goto end; 388 } 389 break; 390 391 case SSL3_ST_CR_CERT_REQ_A: 392 case SSL3_ST_CR_CERT_REQ_B: 393 ret=ssl3_get_certificate_request(s); 394 if (ret <= 0) goto end; 395 s->state=SSL3_ST_CR_SRVR_DONE_A; 396 s->init_num=0; 397 break; 398 399 case SSL3_ST_CR_SRVR_DONE_A: 400 case SSL3_ST_CR_SRVR_DONE_B: 401 ret=ssl3_get_server_done(s); 402 if (ret <= 0) goto end; 403#ifndef OPENSSL_NO_SRP 404 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) 405 { 406 if ((ret = SRP_Calc_A_param(s))<=0) 407 { 408 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_SRP_A_CALC); 409 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR); 410 goto end; 411 } 412 } 413#endif 414 if (s->s3->tmp.cert_req) 415 s->state=SSL3_ST_CW_CERT_A; 416 else 417 s->state=SSL3_ST_CW_KEY_EXCH_A; 418 s->init_num=0; 419 420 break; 421 422 case SSL3_ST_CW_CERT_A: 423 case SSL3_ST_CW_CERT_B: 424 case SSL3_ST_CW_CERT_C: 425 case SSL3_ST_CW_CERT_D: 426 ret=ssl3_send_client_certificate(s); 427 if (ret <= 0) goto end; 428 s->state=SSL3_ST_CW_KEY_EXCH_A; 429 s->init_num=0; 430 break; 431 432 case SSL3_ST_CW_KEY_EXCH_A: 433 case SSL3_ST_CW_KEY_EXCH_B: 434 ret=ssl3_send_client_key_exchange(s); 435 if (ret <= 0) goto end; 436 /* EAY EAY EAY need to check for DH fix cert 437 * sent back */ 438 /* For TLS, cert_req is set to 2, so a cert chain 439 * of nothing is sent, but no verify packet is sent */ 440 /* XXX: For now, we do not support client 441 * authentication in ECDH cipher suites with 442 * ECDH (rather than ECDSA) certificates. 443 * We need to skip the certificate verify 444 * message when client's ECDH public key is sent 445 * inside the client certificate. 446 */ 447 if (s->s3->tmp.cert_req == 1) 448 { 449 s->state=SSL3_ST_CW_CERT_VRFY_A; 450 } 451 else 452 { 453 s->state=SSL3_ST_CW_CHANGE_A; 454 s->s3->change_cipher_spec=0; 455 } 456 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) 457 { 458 s->state=SSL3_ST_CW_CHANGE_A; 459 s->s3->change_cipher_spec=0; 460 } 461 462 s->init_num=0; 463 break; 464 465 case SSL3_ST_CW_CERT_VRFY_A: 466 case SSL3_ST_CW_CERT_VRFY_B: 467 ret=ssl3_send_client_verify(s); 468 if (ret <= 0) goto end; 469 s->state=SSL3_ST_CW_CHANGE_A; 470 s->init_num=0; 471 s->s3->change_cipher_spec=0; 472 break; 473 474 case SSL3_ST_CW_CHANGE_A: 475 case SSL3_ST_CW_CHANGE_B: 476 ret=ssl3_send_change_cipher_spec(s, 477 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B); 478 if (ret <= 0) goto end; 479 480 s->state=SSL3_ST_CW_FINISHED_A; 481#if !defined(OPENSSL_NO_TLSEXT) 482 if (s->s3->tlsext_channel_id_valid) 483 s->state=SSL3_ST_CW_CHANNEL_ID_A; 484# if !defined(OPENSSL_NO_NEXTPROTONEG) 485 if (s->s3->next_proto_neg_seen) 486 s->state=SSL3_ST_CW_NEXT_PROTO_A; 487# endif 488#endif 489 s->init_num=0; 490 491 s->session->cipher=s->s3->tmp.new_cipher; 492#ifdef OPENSSL_NO_COMP 493 s->session->compress_meth=0; 494#else 495 if (s->s3->tmp.new_compression == NULL) 496 s->session->compress_meth=0; 497 else 498 s->session->compress_meth= 499 s->s3->tmp.new_compression->id; 500#endif 501 if (!s->method->ssl3_enc->setup_key_block(s)) 502 { 503 ret= -1; 504 goto end; 505 } 506 507 if (!s->method->ssl3_enc->change_cipher_state(s, 508 SSL3_CHANGE_CIPHER_CLIENT_WRITE)) 509 { 510 ret= -1; 511 goto end; 512 } 513 514 break; 515 516#if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG) 517 case SSL3_ST_CW_NEXT_PROTO_A: 518 case SSL3_ST_CW_NEXT_PROTO_B: 519 ret=ssl3_send_next_proto(s); 520 if (ret <= 0) goto end; 521 if (s->s3->tlsext_channel_id_valid) 522 s->state=SSL3_ST_CW_CHANNEL_ID_A; 523 else 524 s->state=SSL3_ST_CW_FINISHED_A; 525 break; 526#endif 527 528#if !defined(OPENSSL_NO_TLSEXT) 529 case SSL3_ST_CW_CHANNEL_ID_A: 530 case SSL3_ST_CW_CHANNEL_ID_B: 531 ret=ssl3_send_channel_id(s); 532 if (ret <= 0) goto end; 533 s->state=SSL3_ST_CW_FINISHED_A; 534 break; 535#endif 536 537 case SSL3_ST_CW_FINISHED_A: 538 case SSL3_ST_CW_FINISHED_B: 539 ret=ssl3_send_finished(s, 540 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B, 541 s->method->ssl3_enc->client_finished_label, 542 s->method->ssl3_enc->client_finished_label_len); 543 if (ret <= 0) goto end; 544 s->state=SSL3_ST_CW_FLUSH; 545 546 /* clear flags */ 547 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER; 548 if (s->hit) 549 { 550 s->s3->tmp.next_state=SSL_ST_OK; 551 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED) 552 { 553 s->state=SSL_ST_OK; 554 s->s3->flags|=SSL3_FLAGS_POP_BUFFER; 555 s->s3->delay_buf_pop_ret=0; 556 } 557 } 558 else 559 { 560 if ((SSL_get_mode(s) & SSL_MODE_HANDSHAKE_CUTTHROUGH) && SSL_get_cipher_bits(s, NULL) >= 128 561 && s->s3->previous_server_finished_len == 0 /* no cutthrough on renegotiation (would complicate the state machine) */ 562 ) 563 { 564 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED) 565 { 566 s->state=SSL3_ST_CUTTHROUGH_COMPLETE; 567 s->s3->flags|=SSL3_FLAGS_POP_BUFFER; 568 s->s3->delay_buf_pop_ret=0; 569 } 570 else 571 { 572 s->s3->tmp.next_state=SSL3_ST_CUTTHROUGH_COMPLETE; 573 } 574 } 575 else 576 { 577#ifndef OPENSSL_NO_TLSEXT 578 /* Allow NewSessionTicket if ticket expected */ 579 if (s->tlsext_ticket_expected) 580 s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A; 581 else 582#endif 583 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A; 584 } 585 } 586 s->init_num=0; 587 break; 588 589#ifndef OPENSSL_NO_TLSEXT 590 case SSL3_ST_CR_SESSION_TICKET_A: 591 case SSL3_ST_CR_SESSION_TICKET_B: 592 ret=ssl3_get_new_session_ticket(s); 593 if (ret <= 0) goto end; 594 s->state=SSL3_ST_CR_FINISHED_A; 595 s->init_num=0; 596 break; 597 598 case SSL3_ST_CR_CERT_STATUS_A: 599 case SSL3_ST_CR_CERT_STATUS_B: 600 ret=ssl3_get_cert_status(s); 601 if (ret <= 0) goto end; 602 s->state=SSL3_ST_CR_KEY_EXCH_A; 603 s->init_num=0; 604 break; 605#endif 606 607 case SSL3_ST_CR_FINISHED_A: 608 case SSL3_ST_CR_FINISHED_B: 609 610 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A, 611 SSL3_ST_CR_FINISHED_B); 612 if (ret <= 0) goto end; 613 614 if (s->hit) 615 s->state=SSL3_ST_CW_CHANGE_A; 616 else 617 s->state=SSL_ST_OK; 618 s->init_num=0; 619 break; 620 621 case SSL3_ST_CW_FLUSH: 622 s->rwstate=SSL_WRITING; 623 if (BIO_flush(s->wbio) <= 0) 624 { 625 ret= -1; 626 goto end; 627 } 628 s->rwstate=SSL_NOTHING; 629 s->state=s->s3->tmp.next_state; 630 break; 631 632 case SSL3_ST_CUTTHROUGH_COMPLETE: 633#ifndef OPENSSL_NO_TLSEXT 634 /* Allow NewSessionTicket if ticket expected */ 635 if (s->tlsext_ticket_expected) 636 s->state=SSL3_ST_CR_SESSION_TICKET_A; 637 else 638#endif 639 s->state=SSL3_ST_CR_FINISHED_A; 640 641 /* SSL_write() will take care of flushing buffered data if 642 * DELAY_CLIENT_FINISHED is set. 643 */ 644 if (!(s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)) 645 ssl_free_wbio_buffer(s); 646 ret = 1; 647 goto end; 648 /* break; */ 649 650 case SSL_ST_OK: 651 /* clean a few things up */ 652 ssl3_cleanup_key_block(s); 653 654 if (s->init_buf != NULL) 655 { 656 BUF_MEM_free(s->init_buf); 657 s->init_buf=NULL; 658 } 659 660 /* If we are not 'joining' the last two packets, 661 * remove the buffering now */ 662 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER)) 663 ssl_free_wbio_buffer(s); 664 /* else do it later in ssl3_write */ 665 666 s->init_num=0; 667 s->renegotiate=0; 668 s->new_session=0; 669 670 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT); 671 if (s->hit) s->ctx->stats.sess_hit++; 672 673 ret=1; 674 /* s->server=0; */ 675 s->handshake_func=ssl3_connect; 676 s->ctx->stats.sess_connect_good++; 677 678 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1); 679 680 goto end; 681 /* break; */ 682 683 default: 684 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE); 685 ret= -1; 686 goto end; 687 /* break; */ 688 } 689 690 /* did we do anything */ 691 if (!s->s3->tmp.reuse_message && !skip) 692 { 693 if (s->debug) 694 { 695 if ((ret=BIO_flush(s->wbio)) <= 0) 696 goto end; 697 } 698 699 if ((cb != NULL) && (s->state != state)) 700 { 701 new_state=s->state; 702 s->state=state; 703 cb(s,SSL_CB_CONNECT_LOOP,1); 704 s->state=new_state; 705 } 706 } 707 skip=0; 708 } 709end: 710 s->in_handshake--; 711 if (buf != NULL) 712 BUF_MEM_free(buf); 713 if (cb != NULL) 714 cb(s,SSL_CB_CONNECT_EXIT,ret); 715 return(ret); 716 } 717 718 719int ssl3_client_hello(SSL *s) 720 { 721 unsigned char *buf; 722 unsigned char *p,*d; 723 int i; 724 unsigned long Time,l; 725#ifndef OPENSSL_NO_COMP 726 int j; 727 SSL_COMP *comp; 728#endif 729 730 buf=(unsigned char *)s->init_buf->data; 731 if (s->state == SSL3_ST_CW_CLNT_HELLO_A) 732 { 733 SSL_SESSION *sess = s->session; 734 if ((sess == NULL) || 735 (sess->ssl_version != s->version) || 736#ifdef OPENSSL_NO_TLSEXT 737 !sess->session_id_length || 738#else 739 (!sess->session_id_length && !sess->tlsext_tick) || 740#endif 741 (sess->not_resumable)) 742 { 743 if (!s->session_creation_enabled) 744 { 745 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); 746 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_SESSION_MAY_NOT_BE_CREATED); 747 goto err; 748 } 749 if (!ssl_get_new_session(s,0)) 750 goto err; 751 } 752 /* else use the pre-loaded session */ 753 754 p=s->s3->client_random; 755 Time=(unsigned long)time(NULL); /* Time */ 756 l2n(Time,p); 757 if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0) 758 goto err; 759 760 /* Do the message type and length last */ 761 d=p= &(buf[4]); 762 763 /* version indicates the negotiated version: for example from 764 * an SSLv2/v3 compatible client hello). The client_version 765 * field is the maximum version we permit and it is also 766 * used in RSA encrypted premaster secrets. Some servers can 767 * choke if we initially report a higher version then 768 * renegotiate to a lower one in the premaster secret. This 769 * didn't happen with TLS 1.0 as most servers supported it 770 * but it can with TLS 1.1 or later if the server only supports 771 * 1.0. 772 * 773 * Possible scenario with previous logic: 774 * 1. Client hello indicates TLS 1.2 775 * 2. Server hello says TLS 1.0 776 * 3. RSA encrypted premaster secret uses 1.2. 777 * 4. Handhaked proceeds using TLS 1.0. 778 * 5. Server sends hello request to renegotiate. 779 * 6. Client hello indicates TLS v1.0 as we now 780 * know that is maximum server supports. 781 * 7. Server chokes on RSA encrypted premaster secret 782 * containing version 1.0. 783 * 784 * For interoperability it should be OK to always use the 785 * maximum version we support in client hello and then rely 786 * on the checking of version to ensure the servers isn't 787 * being inconsistent: for example initially negotiating with 788 * TLS 1.0 and renegotiating with TLS 1.2. We do this by using 789 * client_version in client hello and not resetting it to 790 * the negotiated version. 791 */ 792#if 0 793 *(p++)=s->version>>8; 794 *(p++)=s->version&0xff; 795 s->client_version=s->version; 796#else 797 *(p++)=s->client_version>>8; 798 *(p++)=s->client_version&0xff; 799#endif 800 801 /* Random stuff */ 802 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE); 803 p+=SSL3_RANDOM_SIZE; 804 805 /* Session ID */ 806 if (s->new_session) 807 i=0; 808 else 809 i=s->session->session_id_length; 810 *(p++)=i; 811 if (i != 0) 812 { 813 if (i > (int)sizeof(s->session->session_id)) 814 { 815 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); 816 goto err; 817 } 818 memcpy(p,s->session->session_id,i); 819 p+=i; 820 } 821 822 /* Ciphers supported */ 823 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0); 824 if (i == 0) 825 { 826 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE); 827 goto err; 828 } 829#ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH 830 /* Some servers hang if client hello > 256 bytes 831 * as hack workaround chop number of supported ciphers 832 * to keep it well below this if we use TLS v1.2 833 */ 834 if (TLS1_get_version(s) >= TLS1_2_VERSION 835 && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH) 836 i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1; 837#endif 838 s2n(i,p); 839 p+=i; 840 841 /* COMPRESSION */ 842#ifdef OPENSSL_NO_COMP 843 *(p++)=1; 844#else 845 846 if ((s->options & SSL_OP_NO_COMPRESSION) 847 || !s->ctx->comp_methods) 848 j=0; 849 else 850 j=sk_SSL_COMP_num(s->ctx->comp_methods); 851 *(p++)=1+j; 852 for (i=0; i<j; i++) 853 { 854 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i); 855 *(p++)=comp->id; 856 } 857#endif 858 *(p++)=0; /* Add the NULL method */ 859 860#ifndef OPENSSL_NO_TLSEXT 861 /* TLS extensions*/ 862 if (ssl_prepare_clienthello_tlsext(s) <= 0) 863 { 864 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT); 865 goto err; 866 } 867 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL) 868 { 869 SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR); 870 goto err; 871 } 872#endif 873 874 l=(p-d); 875 d=buf; 876 *(d++)=SSL3_MT_CLIENT_HELLO; 877 l2n3(l,d); 878 879 s->state=SSL3_ST_CW_CLNT_HELLO_B; 880 /* number of bytes to write */ 881 s->init_num=p-buf; 882 s->init_off=0; 883 } 884 885 /* SSL3_ST_CW_CLNT_HELLO_B */ 886 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 887err: 888 return(-1); 889 } 890 891int ssl3_get_server_hello(SSL *s) 892 { 893 STACK_OF(SSL_CIPHER) *sk; 894 const SSL_CIPHER *c; 895 unsigned char *p,*d; 896 int i,al,ok; 897 unsigned int j; 898 long n; 899#ifndef OPENSSL_NO_COMP 900 SSL_COMP *comp; 901#endif 902 903 n=s->method->ssl_get_message(s, 904 SSL3_ST_CR_SRVR_HELLO_A, 905 SSL3_ST_CR_SRVR_HELLO_B, 906 -1, 907 20000, /* ?? */ 908 &ok); 909 910 if (!ok) return((int)n); 911 912 if ( SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER) 913 { 914 if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST) 915 { 916 if ( s->d1->send_cookie == 0) 917 { 918 s->s3->tmp.reuse_message = 1; 919 return 1; 920 } 921 else /* already sent a cookie */ 922 { 923 al=SSL_AD_UNEXPECTED_MESSAGE; 924 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE); 925 goto f_err; 926 } 927 } 928 } 929 930 if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO) 931 { 932 al=SSL_AD_UNEXPECTED_MESSAGE; 933 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE); 934 goto f_err; 935 } 936 937 d=p=(unsigned char *)s->init_msg; 938 939 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff))) 940 { 941 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION); 942 s->version=(s->version&0xff00)|p[1]; 943 al=SSL_AD_PROTOCOL_VERSION; 944 goto f_err; 945 } 946 p+=2; 947 948 /* load the server hello data */ 949 /* load the server random */ 950 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE); 951 p+=SSL3_RANDOM_SIZE; 952 953 /* get the session-id */ 954 j= *(p++); 955 956 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE)) 957 { 958 al=SSL_AD_ILLEGAL_PARAMETER; 959 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG); 960 goto f_err; 961 } 962 963#ifndef OPENSSL_NO_TLSEXT 964 /* check if we want to resume the session based on external pre-shared secret */ 965 if (s->version >= TLS1_VERSION && s->tls_session_secret_cb) 966 { 967 SSL_CIPHER *pref_cipher=NULL; 968 s->session->master_key_length=sizeof(s->session->master_key); 969 if (s->tls_session_secret_cb(s, s->session->master_key, 970 &s->session->master_key_length, 971 NULL, &pref_cipher, 972 s->tls_session_secret_cb_arg)) 973 { 974 s->session->cipher = pref_cipher ? 975 pref_cipher : ssl_get_cipher_by_char(s, p+j); 976 } 977 } 978#endif /* OPENSSL_NO_TLSEXT */ 979 980 if (j != 0 && j == s->session->session_id_length 981 && memcmp(p,s->session->session_id,j) == 0) 982 { 983 if(s->sid_ctx_length != s->session->sid_ctx_length 984 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length)) 985 { 986 /* actually a client application bug */ 987 al=SSL_AD_ILLEGAL_PARAMETER; 988 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); 989 goto f_err; 990 } 991 s->hit=1; 992 } 993 else /* a miss or crap from the other end */ 994 { 995 /* If we were trying for session-id reuse, make a new 996 * SSL_SESSION so we don't stuff up other people */ 997 s->hit=0; 998 if (s->session->session_id_length > 0) 999 { 1000 if (!s->session_creation_enabled) 1001 { 1002 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); 1003 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SESSION_MAY_NOT_BE_CREATED); 1004 goto err; 1005 } 1006 if (!ssl_get_new_session(s,0)) 1007 { 1008 al=SSL_AD_INTERNAL_ERROR; 1009 goto f_err; 1010 } 1011 } 1012 s->session->session_id_length=j; 1013 memcpy(s->session->session_id,p,j); /* j could be 0 */ 1014 } 1015 p+=j; 1016 c=ssl_get_cipher_by_char(s,p); 1017 if (c == NULL) 1018 { 1019 /* unknown cipher */ 1020 al=SSL_AD_ILLEGAL_PARAMETER; 1021 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED); 1022 goto f_err; 1023 } 1024 /* TLS v1.2 only ciphersuites require v1.2 or later */ 1025 if ((c->algorithm_ssl & SSL_TLSV1_2) && 1026 (TLS1_get_version(s) < TLS1_2_VERSION)) 1027 { 1028 al=SSL_AD_ILLEGAL_PARAMETER; 1029 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED); 1030 goto f_err; 1031 } 1032 p+=ssl_put_cipher_by_char(s,NULL,NULL); 1033 1034 sk=ssl_get_ciphers_by_id(s); 1035 i=sk_SSL_CIPHER_find(sk,c); 1036 if (i < 0) 1037 { 1038 /* we did not say we would use this cipher */ 1039 al=SSL_AD_ILLEGAL_PARAMETER; 1040 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED); 1041 goto f_err; 1042 } 1043 1044 /* Depending on the session caching (internal/external), the cipher 1045 and/or cipher_id values may not be set. Make sure that 1046 cipher_id is set and use it for comparison. */ 1047 if (s->session->cipher) 1048 s->session->cipher_id = s->session->cipher->id; 1049 if (s->hit && (s->session->cipher_id != c->id)) 1050 { 1051/* Workaround is now obsolete */ 1052#if 0 1053 if (!(s->options & 1054 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG)) 1055#endif 1056 { 1057 al=SSL_AD_ILLEGAL_PARAMETER; 1058 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); 1059 goto f_err; 1060 } 1061 } 1062 s->s3->tmp.new_cipher=c; 1063 /* Don't digest cached records if TLS v1.2: we may need them for 1064 * client authentication. 1065 */ 1066 if (TLS1_get_version(s) < TLS1_2_VERSION && !ssl3_digest_cached_records(s)) 1067 { 1068 al = SSL_AD_INTERNAL_ERROR; 1069 goto f_err; 1070 } 1071 /* lets get the compression algorithm */ 1072 /* COMPRESSION */ 1073#ifdef OPENSSL_NO_COMP 1074 if (*(p++) != 0) 1075 { 1076 al=SSL_AD_ILLEGAL_PARAMETER; 1077 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); 1078 goto f_err; 1079 } 1080 /* If compression is disabled we'd better not try to resume a session 1081 * using compression. 1082 */ 1083 if (s->session->compress_meth != 0) 1084 { 1085 al=SSL_AD_INTERNAL_ERROR; 1086 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_INCONSISTENT_COMPRESSION); 1087 goto f_err; 1088 } 1089#else 1090 j= *(p++); 1091 if (s->hit && j != s->session->compress_meth) 1092 { 1093 al=SSL_AD_ILLEGAL_PARAMETER; 1094 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED); 1095 goto f_err; 1096 } 1097 if (j == 0) 1098 comp=NULL; 1099 else if (s->options & SSL_OP_NO_COMPRESSION) 1100 { 1101 al=SSL_AD_ILLEGAL_PARAMETER; 1102 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_COMPRESSION_DISABLED); 1103 goto f_err; 1104 } 1105 else 1106 comp=ssl3_comp_find(s->ctx->comp_methods,j); 1107 1108 if ((j != 0) && (comp == NULL)) 1109 { 1110 al=SSL_AD_ILLEGAL_PARAMETER; 1111 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); 1112 goto f_err; 1113 } 1114 else 1115 { 1116 s->s3->tmp.new_compression=comp; 1117 } 1118#endif 1119 1120#ifndef OPENSSL_NO_TLSEXT 1121 /* TLS extensions*/ 1122 if (s->version >= SSL3_VERSION) 1123 { 1124 if (!ssl_parse_serverhello_tlsext(s,&p,d,n, &al)) 1125 { 1126 /* 'al' set by ssl_parse_serverhello_tlsext */ 1127 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT); 1128 goto f_err; 1129 } 1130 if (ssl_check_serverhello_tlsext(s) <= 0) 1131 { 1132 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SERVERHELLO_TLSEXT); 1133 goto err; 1134 } 1135 } 1136#endif 1137 1138 if (p != (d+n)) 1139 { 1140 /* wrong packet length */ 1141 al=SSL_AD_DECODE_ERROR; 1142 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH); 1143 goto f_err; 1144 } 1145 1146 return(1); 1147f_err: 1148 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1149err: 1150 return(-1); 1151 } 1152 1153int ssl3_get_server_certificate(SSL *s) 1154 { 1155 int al,i,ok,ret= -1; 1156 unsigned long n,nc,llen,l; 1157 X509 *x=NULL; 1158 const unsigned char *q,*p; 1159 unsigned char *d; 1160 STACK_OF(X509) *sk=NULL; 1161 SESS_CERT *sc; 1162 EVP_PKEY *pkey=NULL; 1163 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */ 1164 1165 n=s->method->ssl_get_message(s, 1166 SSL3_ST_CR_CERT_A, 1167 SSL3_ST_CR_CERT_B, 1168 -1, 1169 s->max_cert_list, 1170 &ok); 1171 1172 if (!ok) return((int)n); 1173 1174 if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) || 1175 ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) && 1176 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE))) 1177 { 1178 s->s3->tmp.reuse_message=1; 1179 return(1); 1180 } 1181 1182 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE) 1183 { 1184 al=SSL_AD_UNEXPECTED_MESSAGE; 1185 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE); 1186 goto f_err; 1187 } 1188 p=d=(unsigned char *)s->init_msg; 1189 1190 if ((sk=sk_X509_new_null()) == NULL) 1191 { 1192 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE); 1193 goto err; 1194 } 1195 1196 n2l3(p,llen); 1197 if (llen+3 != n) 1198 { 1199 al=SSL_AD_DECODE_ERROR; 1200 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH); 1201 goto f_err; 1202 } 1203 for (nc=0; nc<llen; ) 1204 { 1205 n2l3(p,l); 1206 if ((l+nc+3) > llen) 1207 { 1208 al=SSL_AD_DECODE_ERROR; 1209 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); 1210 goto f_err; 1211 } 1212 1213 q=p; 1214 x=d2i_X509(NULL,&q,l); 1215 if (x == NULL) 1216 { 1217 al=SSL_AD_BAD_CERTIFICATE; 1218 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB); 1219 goto f_err; 1220 } 1221 if (q != (p+l)) 1222 { 1223 al=SSL_AD_DECODE_ERROR; 1224 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); 1225 goto f_err; 1226 } 1227 if (!sk_X509_push(sk,x)) 1228 { 1229 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE); 1230 goto err; 1231 } 1232 x=NULL; 1233 nc+=l+3; 1234 p=q; 1235 } 1236 1237 i=ssl_verify_cert_chain(s,sk); 1238 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0) 1239#ifndef OPENSSL_NO_KRB5 1240 && !((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) && 1241 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5)) 1242#endif /* OPENSSL_NO_KRB5 */ 1243 ) 1244 { 1245 al=ssl_verify_alarm_type(s->verify_result); 1246 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED); 1247 goto f_err; 1248 } 1249 ERR_clear_error(); /* but we keep s->verify_result */ 1250 1251 sc=ssl_sess_cert_new(); 1252 if (sc == NULL) goto err; 1253 1254 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert); 1255 s->session->sess_cert=sc; 1256 1257 sc->cert_chain=sk; 1258 /* Inconsistency alert: cert_chain does include the peer's 1259 * certificate, which we don't include in s3_srvr.c */ 1260 x=sk_X509_value(sk,0); 1261 sk=NULL; 1262 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/ 1263 1264 pkey=X509_get_pubkey(x); 1265 1266 /* VRS: allow null cert if auth == KRB5 */ 1267 need_cert = ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) && 1268 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5)) 1269 ? 0 : 1; 1270 1271#ifdef KSSL_DEBUG 1272 printf("pkey,x = %p, %p\n", pkey,x); 1273 printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey)); 1274 printf("cipher, alg, nc = %s, %lx, %lx, %d\n", s->s3->tmp.new_cipher->name, 1275 s->s3->tmp.new_cipher->algorithm_mkey, s->s3->tmp.new_cipher->algorithm_auth, need_cert); 1276#endif /* KSSL_DEBUG */ 1277 1278 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey))) 1279 { 1280 x=NULL; 1281 al=SSL3_AL_FATAL; 1282 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 1283 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); 1284 goto f_err; 1285 } 1286 1287 i=ssl_cert_type(x,pkey); 1288 if (need_cert && i < 0) 1289 { 1290 x=NULL; 1291 al=SSL3_AL_FATAL; 1292 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 1293 SSL_R_UNKNOWN_CERTIFICATE_TYPE); 1294 goto f_err; 1295 } 1296 1297 if (need_cert) 1298 { 1299 sc->peer_cert_type=i; 1300 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509); 1301 /* Why would the following ever happen? 1302 * We just created sc a couple of lines ago. */ 1303 if (sc->peer_pkeys[i].x509 != NULL) 1304 X509_free(sc->peer_pkeys[i].x509); 1305 sc->peer_pkeys[i].x509=x; 1306 sc->peer_key= &(sc->peer_pkeys[i]); 1307 1308 if (s->session->peer != NULL) 1309 X509_free(s->session->peer); 1310 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509); 1311 s->session->peer=x; 1312 } 1313 else 1314 { 1315 sc->peer_cert_type=i; 1316 sc->peer_key= NULL; 1317 1318 if (s->session->peer != NULL) 1319 X509_free(s->session->peer); 1320 s->session->peer=NULL; 1321 } 1322 s->session->verify_result = s->verify_result; 1323 1324 x=NULL; 1325 ret=1; 1326 1327 if (0) 1328 { 1329f_err: 1330 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1331 } 1332err: 1333 EVP_PKEY_free(pkey); 1334 X509_free(x); 1335 sk_X509_pop_free(sk,X509_free); 1336 return(ret); 1337 } 1338 1339int ssl3_get_key_exchange(SSL *s) 1340 { 1341#ifndef OPENSSL_NO_RSA 1342 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2]; 1343#endif 1344 EVP_MD_CTX md_ctx; 1345 unsigned char *param,*p; 1346 int al,i,j,param_len,ok; 1347 long n,alg_k,alg_a; 1348 EVP_PKEY *pkey=NULL; 1349 const EVP_MD *md = NULL; 1350#ifndef OPENSSL_NO_RSA 1351 RSA *rsa=NULL; 1352#endif 1353#ifndef OPENSSL_NO_DH 1354 DH *dh=NULL; 1355#endif 1356#ifndef OPENSSL_NO_ECDH 1357 EC_KEY *ecdh = NULL; 1358 BN_CTX *bn_ctx = NULL; 1359 EC_POINT *srvr_ecpoint = NULL; 1360 int curve_nid = 0; 1361 int encoded_pt_len = 0; 1362#endif 1363 1364 /* use same message size as in ssl3_get_certificate_request() 1365 * as ServerKeyExchange message may be skipped */ 1366 n=s->method->ssl_get_message(s, 1367 SSL3_ST_CR_KEY_EXCH_A, 1368 SSL3_ST_CR_KEY_EXCH_B, 1369 -1, 1370 s->max_cert_list, 1371 &ok); 1372 if (!ok) return((int)n); 1373 1374 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE) 1375 { 1376#ifndef OPENSSL_NO_PSK 1377 /* In plain PSK ciphersuite, ServerKeyExchange can be 1378 omitted if no identity hint is sent. Set 1379 session->sess_cert anyway to avoid problems 1380 later.*/ 1381 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK) 1382 { 1383 s->session->sess_cert=ssl_sess_cert_new(); 1384 if (s->ctx->psk_identity_hint) 1385 OPENSSL_free(s->ctx->psk_identity_hint); 1386 s->ctx->psk_identity_hint = NULL; 1387 } 1388#endif 1389 s->s3->tmp.reuse_message=1; 1390 return(1); 1391 } 1392 1393 param=p=(unsigned char *)s->init_msg; 1394 if (s->session->sess_cert != NULL) 1395 { 1396#ifndef OPENSSL_NO_RSA 1397 if (s->session->sess_cert->peer_rsa_tmp != NULL) 1398 { 1399 RSA_free(s->session->sess_cert->peer_rsa_tmp); 1400 s->session->sess_cert->peer_rsa_tmp=NULL; 1401 } 1402#endif 1403#ifndef OPENSSL_NO_DH 1404 if (s->session->sess_cert->peer_dh_tmp) 1405 { 1406 DH_free(s->session->sess_cert->peer_dh_tmp); 1407 s->session->sess_cert->peer_dh_tmp=NULL; 1408 } 1409#endif 1410#ifndef OPENSSL_NO_ECDH 1411 if (s->session->sess_cert->peer_ecdh_tmp) 1412 { 1413 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp); 1414 s->session->sess_cert->peer_ecdh_tmp=NULL; 1415 } 1416#endif 1417 } 1418 else 1419 { 1420 s->session->sess_cert=ssl_sess_cert_new(); 1421 } 1422 1423 param_len=0; 1424 alg_k=s->s3->tmp.new_cipher->algorithm_mkey; 1425 alg_a=s->s3->tmp.new_cipher->algorithm_auth; 1426 EVP_MD_CTX_init(&md_ctx); 1427 1428#ifndef OPENSSL_NO_PSK 1429 if (alg_k & SSL_kPSK) 1430 { 1431 char tmp_id_hint[PSK_MAX_IDENTITY_LEN+1]; 1432 1433 al=SSL_AD_HANDSHAKE_FAILURE; 1434 n2s(p,i); 1435 param_len=i+2; 1436 /* Store PSK identity hint for later use, hint is used 1437 * in ssl3_send_client_key_exchange. Assume that the 1438 * maximum length of a PSK identity hint can be as 1439 * long as the maximum length of a PSK identity. */ 1440 if (i > PSK_MAX_IDENTITY_LEN) 1441 { 1442 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1443 SSL_R_DATA_LENGTH_TOO_LONG); 1444 goto f_err; 1445 } 1446 if (param_len > n) 1447 { 1448 al=SSL_AD_DECODE_ERROR; 1449 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1450 SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH); 1451 goto f_err; 1452 } 1453 /* If received PSK identity hint contains NULL 1454 * characters, the hint is truncated from the first 1455 * NULL. p may not be ending with NULL, so create a 1456 * NULL-terminated string. */ 1457 memcpy(tmp_id_hint, p, i); 1458 memset(tmp_id_hint+i, 0, PSK_MAX_IDENTITY_LEN+1-i); 1459 if (s->ctx->psk_identity_hint != NULL) 1460 OPENSSL_free(s->ctx->psk_identity_hint); 1461 s->ctx->psk_identity_hint = BUF_strdup(tmp_id_hint); 1462 if (s->ctx->psk_identity_hint == NULL) 1463 { 1464 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); 1465 goto f_err; 1466 } 1467 1468 p+=i; 1469 n-=param_len; 1470 } 1471 else 1472#endif /* !OPENSSL_NO_PSK */ 1473#ifndef OPENSSL_NO_SRP 1474 if (alg_k & SSL_kSRP) 1475 { 1476 n2s(p,i); 1477 param_len=i+2; 1478 if (param_len > n) 1479 { 1480 al=SSL_AD_DECODE_ERROR; 1481 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_N_LENGTH); 1482 goto f_err; 1483 } 1484 if (!(s->srp_ctx.N=BN_bin2bn(p,i,NULL))) 1485 { 1486 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1487 goto err; 1488 } 1489 p+=i; 1490 1491 n2s(p,i); 1492 param_len+=i+2; 1493 if (param_len > n) 1494 { 1495 al=SSL_AD_DECODE_ERROR; 1496 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_G_LENGTH); 1497 goto f_err; 1498 } 1499 if (!(s->srp_ctx.g=BN_bin2bn(p,i,NULL))) 1500 { 1501 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1502 goto err; 1503 } 1504 p+=i; 1505 1506 i = (unsigned int)(p[0]); 1507 p++; 1508 param_len+=i+1; 1509 if (param_len > n) 1510 { 1511 al=SSL_AD_DECODE_ERROR; 1512 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_S_LENGTH); 1513 goto f_err; 1514 } 1515 if (!(s->srp_ctx.s=BN_bin2bn(p,i,NULL))) 1516 { 1517 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1518 goto err; 1519 } 1520 p+=i; 1521 1522 n2s(p,i); 1523 param_len+=i+2; 1524 if (param_len > n) 1525 { 1526 al=SSL_AD_DECODE_ERROR; 1527 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_B_LENGTH); 1528 goto f_err; 1529 } 1530 if (!(s->srp_ctx.B=BN_bin2bn(p,i,NULL))) 1531 { 1532 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1533 goto err; 1534 } 1535 p+=i; 1536 n-=param_len; 1537 1538/* We must check if there is a certificate */ 1539#ifndef OPENSSL_NO_RSA 1540 if (alg_a & SSL_aRSA) 1541 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1542#else 1543 if (0) 1544 ; 1545#endif 1546#ifndef OPENSSL_NO_DSA 1547 else if (alg_a & SSL_aDSS) 1548 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509); 1549#endif 1550 } 1551 else 1552#endif /* !OPENSSL_NO_SRP */ 1553#ifndef OPENSSL_NO_RSA 1554 if (alg_k & SSL_kRSA) 1555 { 1556 if ((rsa=RSA_new()) == NULL) 1557 { 1558 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1559 goto err; 1560 } 1561 n2s(p,i); 1562 param_len=i+2; 1563 if (param_len > n) 1564 { 1565 al=SSL_AD_DECODE_ERROR; 1566 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH); 1567 goto f_err; 1568 } 1569 if (!(rsa->n=BN_bin2bn(p,i,rsa->n))) 1570 { 1571 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1572 goto err; 1573 } 1574 p+=i; 1575 1576 n2s(p,i); 1577 param_len+=i+2; 1578 if (param_len > n) 1579 { 1580 al=SSL_AD_DECODE_ERROR; 1581 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH); 1582 goto f_err; 1583 } 1584 if (!(rsa->e=BN_bin2bn(p,i,rsa->e))) 1585 { 1586 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1587 goto err; 1588 } 1589 p+=i; 1590 n-=param_len; 1591 1592 /* this should be because we are using an export cipher */ 1593 if (alg_a & SSL_aRSA) 1594 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1595 else 1596 { 1597 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1598 goto err; 1599 } 1600 s->session->sess_cert->peer_rsa_tmp=rsa; 1601 rsa=NULL; 1602 } 1603#else /* OPENSSL_NO_RSA */ 1604 if (0) 1605 ; 1606#endif 1607#ifndef OPENSSL_NO_DH 1608 else if (alg_k & SSL_kEDH) 1609 { 1610 if ((dh=DH_new()) == NULL) 1611 { 1612 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB); 1613 goto err; 1614 } 1615 n2s(p,i); 1616 param_len=i+2; 1617 if (param_len > n) 1618 { 1619 al=SSL_AD_DECODE_ERROR; 1620 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH); 1621 goto f_err; 1622 } 1623 if (!(dh->p=BN_bin2bn(p,i,NULL))) 1624 { 1625 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1626 goto err; 1627 } 1628 p+=i; 1629 1630 n2s(p,i); 1631 param_len+=i+2; 1632 if (param_len > n) 1633 { 1634 al=SSL_AD_DECODE_ERROR; 1635 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH); 1636 goto f_err; 1637 } 1638 if (!(dh->g=BN_bin2bn(p,i,NULL))) 1639 { 1640 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1641 goto err; 1642 } 1643 p+=i; 1644 1645 n2s(p,i); 1646 param_len+=i+2; 1647 if (param_len > n) 1648 { 1649 al=SSL_AD_DECODE_ERROR; 1650 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH); 1651 goto f_err; 1652 } 1653 if (!(dh->pub_key=BN_bin2bn(p,i,NULL))) 1654 { 1655 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1656 goto err; 1657 } 1658 p+=i; 1659 n-=param_len; 1660 1661#ifndef OPENSSL_NO_RSA 1662 if (alg_a & SSL_aRSA) 1663 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1664#else 1665 if (0) 1666 ; 1667#endif 1668#ifndef OPENSSL_NO_DSA 1669 else if (alg_a & SSL_aDSS) 1670 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509); 1671#endif 1672 /* else anonymous DH, so no certificate or pkey. */ 1673 1674 s->session->sess_cert->peer_dh_tmp=dh; 1675 dh=NULL; 1676 } 1677 else if ((alg_k & SSL_kDHr) || (alg_k & SSL_kDHd)) 1678 { 1679 al=SSL_AD_ILLEGAL_PARAMETER; 1680 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER); 1681 goto f_err; 1682 } 1683#endif /* !OPENSSL_NO_DH */ 1684 1685#ifndef OPENSSL_NO_ECDH 1686 else if (alg_k & SSL_kEECDH) 1687 { 1688 EC_GROUP *ngroup; 1689 const EC_GROUP *group; 1690 1691 if ((ecdh=EC_KEY_new()) == NULL) 1692 { 1693 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1694 goto err; 1695 } 1696 1697 /* Extract elliptic curve parameters and the 1698 * server's ephemeral ECDH public key. 1699 * Keep accumulating lengths of various components in 1700 * param_len and make sure it never exceeds n. 1701 */ 1702 1703 /* XXX: For now we only support named (not generic) curves 1704 * and the ECParameters in this case is just three bytes. 1705 */ 1706 param_len=3; 1707 if ((param_len > n) || 1708 (*p != NAMED_CURVE_TYPE) || 1709 ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0)) 1710 { 1711 al=SSL_AD_INTERNAL_ERROR; 1712 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); 1713 goto f_err; 1714 } 1715 1716 ngroup = EC_GROUP_new_by_curve_name(curve_nid); 1717 if (ngroup == NULL) 1718 { 1719 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB); 1720 goto err; 1721 } 1722 if (EC_KEY_set_group(ecdh, ngroup) == 0) 1723 { 1724 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB); 1725 goto err; 1726 } 1727 EC_GROUP_free(ngroup); 1728 1729 group = EC_KEY_get0_group(ecdh); 1730 1731 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && 1732 (EC_GROUP_get_degree(group) > 163)) 1733 { 1734 al=SSL_AD_EXPORT_RESTRICTION; 1735 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER); 1736 goto f_err; 1737 } 1738 1739 p+=3; 1740 1741 /* Next, get the encoded ECPoint */ 1742 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) || 1743 ((bn_ctx = BN_CTX_new()) == NULL)) 1744 { 1745 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1746 goto err; 1747 } 1748 1749 encoded_pt_len = *p; /* length of encoded point */ 1750 p+=1; 1751 param_len += (1 + encoded_pt_len); 1752 if ((param_len > n) || 1753 (EC_POINT_oct2point(group, srvr_ecpoint, 1754 p, encoded_pt_len, bn_ctx) == 0)) 1755 { 1756 al=SSL_AD_DECODE_ERROR; 1757 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT); 1758 goto f_err; 1759 } 1760 1761 n-=param_len; 1762 p+=encoded_pt_len; 1763 1764 /* The ECC/TLS specification does not mention 1765 * the use of DSA to sign ECParameters in the server 1766 * key exchange message. We do support RSA and ECDSA. 1767 */ 1768 if (0) ; 1769#ifndef OPENSSL_NO_RSA 1770 else if (alg_a & SSL_aRSA) 1771 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1772#endif 1773#ifndef OPENSSL_NO_ECDSA 1774 else if (alg_a & SSL_aECDSA) 1775 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509); 1776#endif 1777 /* else anonymous ECDH, so no certificate or pkey. */ 1778 EC_KEY_set_public_key(ecdh, srvr_ecpoint); 1779 s->session->sess_cert->peer_ecdh_tmp=ecdh; 1780 ecdh=NULL; 1781 BN_CTX_free(bn_ctx); 1782 bn_ctx = NULL; 1783 EC_POINT_free(srvr_ecpoint); 1784 srvr_ecpoint = NULL; 1785 } 1786 else if (alg_k) 1787 { 1788 al=SSL_AD_UNEXPECTED_MESSAGE; 1789 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE); 1790 goto f_err; 1791 } 1792#endif /* !OPENSSL_NO_ECDH */ 1793 1794 1795 /* p points to the next byte, there are 'n' bytes left */ 1796 1797 /* if it was signed, check the signature */ 1798 if (pkey != NULL) 1799 { 1800 if (TLS1_get_version(s) >= TLS1_2_VERSION) 1801 { 1802 int sigalg = tls12_get_sigid(pkey); 1803 /* Should never happen */ 1804 if (sigalg == -1) 1805 { 1806 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1807 goto err; 1808 } 1809 /* Check key type is consistent with signature */ 1810 if (sigalg != (int)p[1]) 1811 { 1812 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_TYPE); 1813 al=SSL_AD_DECODE_ERROR; 1814 goto f_err; 1815 } 1816 md = tls12_get_hash(p[0]); 1817 if (md == NULL) 1818 { 1819 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNKNOWN_DIGEST); 1820 al=SSL_AD_DECODE_ERROR; 1821 goto f_err; 1822 } 1823#ifdef SSL_DEBUG 1824fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md)); 1825#endif 1826 p += 2; 1827 n -= 2; 1828 } 1829 else 1830 md = EVP_sha1(); 1831 1832 n2s(p,i); 1833 n-=2; 1834 j=EVP_PKEY_size(pkey); 1835 1836 if ((i != n) || (n > j) || (n <= 0)) 1837 { 1838 /* wrong packet length */ 1839 al=SSL_AD_DECODE_ERROR; 1840 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH); 1841 goto f_err; 1842 } 1843 1844#ifndef OPENSSL_NO_RSA 1845 if (pkey->type == EVP_PKEY_RSA && TLS1_get_version(s) < TLS1_2_VERSION) 1846 { 1847 int num; 1848 1849 j=0; 1850 q=md_buf; 1851 for (num=2; num > 0; num--) 1852 { 1853 EVP_MD_CTX_set_flags(&md_ctx, 1854 EVP_MD_CTX_FLAG_NON_FIPS_ALLOW); 1855 EVP_DigestInit_ex(&md_ctx,(num == 2) 1856 ?s->ctx->md5:s->ctx->sha1, NULL); 1857 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); 1858 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); 1859 EVP_DigestUpdate(&md_ctx,param,param_len); 1860 EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i); 1861 q+=i; 1862 j+=i; 1863 } 1864 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n, 1865 pkey->pkey.rsa); 1866 if (i < 0) 1867 { 1868 al=SSL_AD_DECRYPT_ERROR; 1869 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT); 1870 goto f_err; 1871 } 1872 if (i == 0) 1873 { 1874 /* bad signature */ 1875 al=SSL_AD_DECRYPT_ERROR; 1876 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE); 1877 goto f_err; 1878 } 1879 } 1880 else 1881#endif 1882 { 1883 EVP_VerifyInit_ex(&md_ctx, md, NULL); 1884 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); 1885 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); 1886 EVP_VerifyUpdate(&md_ctx,param,param_len); 1887 if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0) 1888 { 1889 /* bad signature */ 1890 al=SSL_AD_DECRYPT_ERROR; 1891 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE); 1892 goto f_err; 1893 } 1894 } 1895 } 1896 else 1897 { 1898 if (!(alg_a & SSL_aNULL) && !(alg_k & SSL_kPSK)) 1899 /* aNULL or kPSK do not need public keys */ 1900 { 1901 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1902 goto err; 1903 } 1904 /* still data left over */ 1905 if (n != 0) 1906 { 1907 al=SSL_AD_DECODE_ERROR; 1908 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE); 1909 goto f_err; 1910 } 1911 } 1912 EVP_PKEY_free(pkey); 1913 EVP_MD_CTX_cleanup(&md_ctx); 1914 return(1); 1915f_err: 1916 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1917err: 1918 EVP_PKEY_free(pkey); 1919#ifndef OPENSSL_NO_RSA 1920 if (rsa != NULL) 1921 RSA_free(rsa); 1922#endif 1923#ifndef OPENSSL_NO_DH 1924 if (dh != NULL) 1925 DH_free(dh); 1926#endif 1927#ifndef OPENSSL_NO_ECDH 1928 BN_CTX_free(bn_ctx); 1929 EC_POINT_free(srvr_ecpoint); 1930 if (ecdh != NULL) 1931 EC_KEY_free(ecdh); 1932#endif 1933 EVP_MD_CTX_cleanup(&md_ctx); 1934 return(-1); 1935 } 1936 1937int ssl3_get_certificate_request(SSL *s) 1938 { 1939 int ok,ret=0; 1940 unsigned long n,nc,l; 1941 unsigned int llen, ctype_num,i; 1942 X509_NAME *xn=NULL; 1943 const unsigned char *p,*q; 1944 unsigned char *d; 1945 STACK_OF(X509_NAME) *ca_sk=NULL; 1946 1947 n=s->method->ssl_get_message(s, 1948 SSL3_ST_CR_CERT_REQ_A, 1949 SSL3_ST_CR_CERT_REQ_B, 1950 -1, 1951 s->max_cert_list, 1952 &ok); 1953 1954 if (!ok) return((int)n); 1955 1956 s->s3->tmp.cert_req=0; 1957 1958 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE) 1959 { 1960 s->s3->tmp.reuse_message=1; 1961 /* If we get here we don't need any cached handshake records 1962 * as we wont be doing client auth. 1963 */ 1964 if (s->s3->handshake_buffer) 1965 { 1966 if (!ssl3_digest_cached_records(s)) 1967 goto err; 1968 } 1969 return(1); 1970 } 1971 1972 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST) 1973 { 1974 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 1975 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE); 1976 goto err; 1977 } 1978 1979 /* TLS does not like anon-DH with client cert */ 1980 if (s->version > SSL3_VERSION) 1981 { 1982 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) 1983 { 1984 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 1985 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER); 1986 goto err; 1987 } 1988 } 1989 1990 p=d=(unsigned char *)s->init_msg; 1991 1992 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL) 1993 { 1994 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE); 1995 goto err; 1996 } 1997 1998 /* get the certificate types */ 1999 ctype_num= *(p++); 2000 if (ctype_num > SSL3_CT_NUMBER) 2001 ctype_num=SSL3_CT_NUMBER; 2002 for (i=0; i<ctype_num; i++) 2003 s->s3->tmp.ctype[i]= p[i]; 2004 p+=ctype_num; 2005 if (TLS1_get_version(s) >= TLS1_2_VERSION) 2006 { 2007 n2s(p, llen); 2008 /* Check we have enough room for signature algorithms and 2009 * following length value. 2010 */ 2011 if ((unsigned long)(p - d + llen + 2) > n) 2012 { 2013 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 2014 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_DATA_LENGTH_TOO_LONG); 2015 goto err; 2016 } 2017 if ((llen & 1) || !tls1_process_sigalgs(s, p, llen)) 2018 { 2019 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 2020 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_SIGNATURE_ALGORITHMS_ERROR); 2021 goto err; 2022 } 2023 p += llen; 2024 } 2025 2026 /* get the CA RDNs */ 2027 n2s(p,llen); 2028#if 0 2029{ 2030FILE *out; 2031out=fopen("/tmp/vsign.der","w"); 2032fwrite(p,1,llen,out); 2033fclose(out); 2034} 2035#endif 2036 2037 if ((unsigned long)(p - d + llen) != n) 2038 { 2039 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 2040 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH); 2041 goto err; 2042 } 2043 2044 for (nc=0; nc<llen; ) 2045 { 2046 n2s(p,l); 2047 if ((l+nc+2) > llen) 2048 { 2049 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG)) 2050 goto cont; /* netscape bugs */ 2051 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 2052 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG); 2053 goto err; 2054 } 2055 2056 q=p; 2057 2058 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL) 2059 { 2060 /* If netscape tolerance is on, ignore errors */ 2061 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG) 2062 goto cont; 2063 else 2064 { 2065 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 2066 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB); 2067 goto err; 2068 } 2069 } 2070 2071 if (q != (p+l)) 2072 { 2073 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 2074 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH); 2075 goto err; 2076 } 2077 if (!sk_X509_NAME_push(ca_sk,xn)) 2078 { 2079 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE); 2080 goto err; 2081 } 2082 2083 p+=l; 2084 nc+=l+2; 2085 } 2086 2087 if (0) 2088 { 2089cont: 2090 ERR_clear_error(); 2091 } 2092 2093 /* we should setup a certificate to return.... */ 2094 s->s3->tmp.cert_req=1; 2095 s->s3->tmp.ctype_num=ctype_num; 2096 if (s->s3->tmp.ca_names != NULL) 2097 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free); 2098 s->s3->tmp.ca_names=ca_sk; 2099 ca_sk=NULL; 2100 2101 ret=1; 2102err: 2103 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free); 2104 return(ret); 2105 } 2106 2107static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b) 2108 { 2109 return(X509_NAME_cmp(*a,*b)); 2110 } 2111#ifndef OPENSSL_NO_TLSEXT 2112int ssl3_get_new_session_ticket(SSL *s) 2113 { 2114 int ok,al,ret=0, ticklen; 2115 long n; 2116 const unsigned char *p; 2117 unsigned char *d; 2118 2119 n=s->method->ssl_get_message(s, 2120 SSL3_ST_CR_SESSION_TICKET_A, 2121 SSL3_ST_CR_SESSION_TICKET_B, 2122 -1, 2123 16384, 2124 &ok); 2125 2126 if (!ok) 2127 return((int)n); 2128 2129 if (s->s3->tmp.message_type == SSL3_MT_FINISHED) 2130 { 2131 s->s3->tmp.reuse_message=1; 2132 return(1); 2133 } 2134 if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET) 2135 { 2136 al=SSL_AD_UNEXPECTED_MESSAGE; 2137 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_BAD_MESSAGE_TYPE); 2138 goto f_err; 2139 } 2140 if (n < 6) 2141 { 2142 /* need at least ticket_lifetime_hint + ticket length */ 2143 al = SSL_AD_DECODE_ERROR; 2144 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH); 2145 goto f_err; 2146 } 2147 2148 p=d=(unsigned char *)s->init_msg; 2149 n2l(p, s->session->tlsext_tick_lifetime_hint); 2150 n2s(p, ticklen); 2151 /* ticket_lifetime_hint + ticket_length + ticket */ 2152 if (ticklen + 6 != n) 2153 { 2154 al = SSL_AD_DECODE_ERROR; 2155 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH); 2156 goto f_err; 2157 } 2158 if (s->session->tlsext_tick) 2159 { 2160 OPENSSL_free(s->session->tlsext_tick); 2161 s->session->tlsext_ticklen = 0; 2162 } 2163 s->session->tlsext_tick = OPENSSL_malloc(ticklen); 2164 if (!s->session->tlsext_tick) 2165 { 2166 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE); 2167 goto err; 2168 } 2169 memcpy(s->session->tlsext_tick, p, ticklen); 2170 s->session->tlsext_ticklen = ticklen; 2171 /* There are two ways to detect a resumed ticket sesion. 2172 * One is to set an appropriate session ID and then the server 2173 * must return a match in ServerHello. This allows the normal 2174 * client session ID matching to work and we know much 2175 * earlier that the ticket has been accepted. 2176 * 2177 * The other way is to set zero length session ID when the 2178 * ticket is presented and rely on the handshake to determine 2179 * session resumption. 2180 * 2181 * We choose the former approach because this fits in with 2182 * assumptions elsewhere in OpenSSL. The session ID is set 2183 * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the 2184 * ticket. 2185 */ 2186 EVP_Digest(p, ticklen, 2187 s->session->session_id, &s->session->session_id_length, 2188#ifndef OPENSSL_NO_SHA256 2189 EVP_sha256(), NULL); 2190#else 2191 EVP_sha1(), NULL); 2192#endif 2193 ret=1; 2194 return(ret); 2195f_err: 2196 ssl3_send_alert(s,SSL3_AL_FATAL,al); 2197err: 2198 return(-1); 2199 } 2200 2201int ssl3_get_cert_status(SSL *s) 2202 { 2203 int ok, al; 2204 unsigned long resplen,n; 2205 const unsigned char *p; 2206 2207 n=s->method->ssl_get_message(s, 2208 SSL3_ST_CR_CERT_STATUS_A, 2209 SSL3_ST_CR_CERT_STATUS_B, 2210 SSL3_MT_CERTIFICATE_STATUS, 2211 16384, 2212 &ok); 2213 2214 if (!ok) return((int)n); 2215 if (n < 4) 2216 { 2217 /* need at least status type + length */ 2218 al = SSL_AD_DECODE_ERROR; 2219 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH); 2220 goto f_err; 2221 } 2222 p = (unsigned char *)s->init_msg; 2223 if (*p++ != TLSEXT_STATUSTYPE_ocsp) 2224 { 2225 al = SSL_AD_DECODE_ERROR; 2226 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_UNSUPPORTED_STATUS_TYPE); 2227 goto f_err; 2228 } 2229 n2l3(p, resplen); 2230 if (resplen + 4 != n) 2231 { 2232 al = SSL_AD_DECODE_ERROR; 2233 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH); 2234 goto f_err; 2235 } 2236 if (s->tlsext_ocsp_resp) 2237 OPENSSL_free(s->tlsext_ocsp_resp); 2238 s->tlsext_ocsp_resp = BUF_memdup(p, resplen); 2239 if (!s->tlsext_ocsp_resp) 2240 { 2241 al = SSL_AD_INTERNAL_ERROR; 2242 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE); 2243 goto f_err; 2244 } 2245 s->tlsext_ocsp_resplen = resplen; 2246 if (s->ctx->tlsext_status_cb) 2247 { 2248 int ret; 2249 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg); 2250 if (ret == 0) 2251 { 2252 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE; 2253 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_INVALID_STATUS_RESPONSE); 2254 goto f_err; 2255 } 2256 if (ret < 0) 2257 { 2258 al = SSL_AD_INTERNAL_ERROR; 2259 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE); 2260 goto f_err; 2261 } 2262 } 2263 return 1; 2264f_err: 2265 ssl3_send_alert(s,SSL3_AL_FATAL,al); 2266 return(-1); 2267 } 2268#endif 2269 2270int ssl3_get_server_done(SSL *s) 2271 { 2272 int ok,ret=0; 2273 long n; 2274 2275 n=s->method->ssl_get_message(s, 2276 SSL3_ST_CR_SRVR_DONE_A, 2277 SSL3_ST_CR_SRVR_DONE_B, 2278 SSL3_MT_SERVER_DONE, 2279 30, /* should be very small, like 0 :-) */ 2280 &ok); 2281 2282 if (!ok) return((int)n); 2283 if (n > 0) 2284 { 2285 /* should contain no data */ 2286 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 2287 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH); 2288 return -1; 2289 } 2290 ret=1; 2291 return(ret); 2292 } 2293 2294 2295int ssl3_send_client_key_exchange(SSL *s) 2296 { 2297 unsigned char *p,*d; 2298 int n; 2299 unsigned long alg_k; 2300#ifndef OPENSSL_NO_RSA 2301 unsigned char *q; 2302 EVP_PKEY *pkey=NULL; 2303#endif 2304#ifndef OPENSSL_NO_KRB5 2305 KSSL_ERR kssl_err; 2306#endif /* OPENSSL_NO_KRB5 */ 2307#ifndef OPENSSL_NO_ECDH 2308 EC_KEY *clnt_ecdh = NULL; 2309 const EC_POINT *srvr_ecpoint = NULL; 2310 EVP_PKEY *srvr_pub_pkey = NULL; 2311 unsigned char *encodedPoint = NULL; 2312 int encoded_pt_len = 0; 2313 BN_CTX * bn_ctx = NULL; 2314#endif 2315 2316 if (s->state == SSL3_ST_CW_KEY_EXCH_A) 2317 { 2318 d=(unsigned char *)s->init_buf->data; 2319 p= &(d[4]); 2320 2321 alg_k=s->s3->tmp.new_cipher->algorithm_mkey; 2322 2323 /* Fool emacs indentation */ 2324 if (0) {} 2325#ifndef OPENSSL_NO_RSA 2326 else if (alg_k & SSL_kRSA) 2327 { 2328 RSA *rsa; 2329 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; 2330 2331 if (s->session->sess_cert->peer_rsa_tmp != NULL) 2332 rsa=s->session->sess_cert->peer_rsa_tmp; 2333 else 2334 { 2335 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 2336 if ((pkey == NULL) || 2337 (pkey->type != EVP_PKEY_RSA) || 2338 (pkey->pkey.rsa == NULL)) 2339 { 2340 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 2341 goto err; 2342 } 2343 rsa=pkey->pkey.rsa; 2344 EVP_PKEY_free(pkey); 2345 } 2346 2347 tmp_buf[0]=s->client_version>>8; 2348 tmp_buf[1]=s->client_version&0xff; 2349 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0) 2350 goto err; 2351 2352 s->session->master_key_length=sizeof tmp_buf; 2353 2354 q=p; 2355 /* Fix buf for TLS and beyond */ 2356 if (s->version > SSL3_VERSION) 2357 p+=2; 2358 n=RSA_public_encrypt(sizeof tmp_buf, 2359 tmp_buf,p,rsa,RSA_PKCS1_PADDING); 2360#ifdef PKCS1_CHECK 2361 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++; 2362 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70; 2363#endif 2364 if (n <= 0) 2365 { 2366 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT); 2367 goto err; 2368 } 2369 2370 /* Fix buf for TLS and beyond */ 2371 if (s->version > SSL3_VERSION) 2372 { 2373 s2n(n,q); 2374 n+=2; 2375 } 2376 2377 s->session->master_key_length= 2378 s->method->ssl3_enc->generate_master_secret(s, 2379 s->session->master_key, 2380 tmp_buf,sizeof tmp_buf); 2381 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf); 2382 } 2383#endif 2384#ifndef OPENSSL_NO_KRB5 2385 else if (alg_k & SSL_kKRB5) 2386 { 2387 krb5_error_code krb5rc; 2388 KSSL_CTX *kssl_ctx = s->kssl_ctx; 2389 /* krb5_data krb5_ap_req; */ 2390 krb5_data *enc_ticket; 2391 krb5_data authenticator, *authp = NULL; 2392 EVP_CIPHER_CTX ciph_ctx; 2393 const EVP_CIPHER *enc = NULL; 2394 unsigned char iv[EVP_MAX_IV_LENGTH]; 2395 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; 2396 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH 2397 + EVP_MAX_IV_LENGTH]; 2398 int padl, outl = sizeof(epms); 2399 2400 EVP_CIPHER_CTX_init(&ciph_ctx); 2401 2402#ifdef KSSL_DEBUG 2403 printf("ssl3_send_client_key_exchange(%lx & %lx)\n", 2404 alg_k, SSL_kKRB5); 2405#endif /* KSSL_DEBUG */ 2406 2407 authp = NULL; 2408#ifdef KRB5SENDAUTH 2409 if (KRB5SENDAUTH) authp = &authenticator; 2410#endif /* KRB5SENDAUTH */ 2411 2412 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp, 2413 &kssl_err); 2414 enc = kssl_map_enc(kssl_ctx->enctype); 2415 if (enc == NULL) 2416 goto err; 2417#ifdef KSSL_DEBUG 2418 { 2419 printf("kssl_cget_tkt rtn %d\n", krb5rc); 2420 if (krb5rc && kssl_err.text) 2421 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text); 2422 } 2423#endif /* KSSL_DEBUG */ 2424 2425 if (krb5rc) 2426 { 2427 ssl3_send_alert(s,SSL3_AL_FATAL, 2428 SSL_AD_HANDSHAKE_FAILURE); 2429 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2430 kssl_err.reason); 2431 goto err; 2432 } 2433 2434 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ 2435 ** in place of RFC 2712 KerberosWrapper, as in: 2436 ** 2437 ** Send ticket (copy to *p, set n = length) 2438 ** n = krb5_ap_req.length; 2439 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length); 2440 ** if (krb5_ap_req.data) 2441 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req); 2442 ** 2443 ** Now using real RFC 2712 KerberosWrapper 2444 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>) 2445 ** Note: 2712 "opaque" types are here replaced 2446 ** with a 2-byte length followed by the value. 2447 ** Example: 2448 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms 2449 ** Where "xx xx" = length bytes. Shown here with 2450 ** optional authenticator omitted. 2451 */ 2452 2453 /* KerberosWrapper.Ticket */ 2454 s2n(enc_ticket->length,p); 2455 memcpy(p, enc_ticket->data, enc_ticket->length); 2456 p+= enc_ticket->length; 2457 n = enc_ticket->length + 2; 2458 2459 /* KerberosWrapper.Authenticator */ 2460 if (authp && authp->length) 2461 { 2462 s2n(authp->length,p); 2463 memcpy(p, authp->data, authp->length); 2464 p+= authp->length; 2465 n+= authp->length + 2; 2466 2467 free(authp->data); 2468 authp->data = NULL; 2469 authp->length = 0; 2470 } 2471 else 2472 { 2473 s2n(0,p);/* null authenticator length */ 2474 n+=2; 2475 } 2476 2477 tmp_buf[0]=s->client_version>>8; 2478 tmp_buf[1]=s->client_version&0xff; 2479 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0) 2480 goto err; 2481 2482 /* 20010420 VRS. Tried it this way; failed. 2483 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL); 2484 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx, 2485 ** kssl_ctx->length); 2486 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv); 2487 */ 2488 2489 memset(iv, 0, sizeof iv); /* per RFC 1510 */ 2490 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL, 2491 kssl_ctx->key,iv); 2492 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf, 2493 sizeof tmp_buf); 2494 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl); 2495 outl += padl; 2496 if (outl > (int)sizeof epms) 2497 { 2498 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); 2499 goto err; 2500 } 2501 EVP_CIPHER_CTX_cleanup(&ciph_ctx); 2502 2503 /* KerberosWrapper.EncryptedPreMasterSecret */ 2504 s2n(outl,p); 2505 memcpy(p, epms, outl); 2506 p+=outl; 2507 n+=outl + 2; 2508 2509 s->session->master_key_length= 2510 s->method->ssl3_enc->generate_master_secret(s, 2511 s->session->master_key, 2512 tmp_buf, sizeof tmp_buf); 2513 2514 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf); 2515 OPENSSL_cleanse(epms, outl); 2516 } 2517#endif 2518#ifndef OPENSSL_NO_DH 2519 else if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) 2520 { 2521 DH *dh_srvr,*dh_clnt; 2522 2523 if (s->session->sess_cert == NULL) 2524 { 2525 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 2526 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE); 2527 goto err; 2528 } 2529 2530 if (s->session->sess_cert->peer_dh_tmp != NULL) 2531 dh_srvr=s->session->sess_cert->peer_dh_tmp; 2532 else 2533 { 2534 /* we get them from the cert */ 2535 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); 2536 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS); 2537 goto err; 2538 } 2539 2540 /* generate a new random key */ 2541 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL) 2542 { 2543 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 2544 goto err; 2545 } 2546 if (!DH_generate_key(dh_clnt)) 2547 { 2548 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 2549 DH_free(dh_clnt); 2550 goto err; 2551 } 2552 2553 /* use the 'p' output buffer for the DH key, but 2554 * make sure to clear it out afterwards */ 2555 2556 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt); 2557 2558 if (n <= 0) 2559 { 2560 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 2561 DH_free(dh_clnt); 2562 goto err; 2563 } 2564 2565 /* generate master key from the result */ 2566 s->session->master_key_length= 2567 s->method->ssl3_enc->generate_master_secret(s, 2568 s->session->master_key,p,n); 2569 /* clean up */ 2570 memset(p,0,n); 2571 2572 /* send off the data */ 2573 n=BN_num_bytes(dh_clnt->pub_key); 2574 s2n(n,p); 2575 BN_bn2bin(dh_clnt->pub_key,p); 2576 n+=2; 2577 2578 DH_free(dh_clnt); 2579 2580 /* perhaps clean things up a bit EAY EAY EAY EAY*/ 2581 } 2582#endif 2583 2584#ifndef OPENSSL_NO_ECDH 2585 else if (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)) 2586 { 2587 const EC_GROUP *srvr_group = NULL; 2588 EC_KEY *tkey; 2589 int ecdh_clnt_cert = 0; 2590 int field_size = 0; 2591 2592 /* Did we send out the client's 2593 * ECDH share for use in premaster 2594 * computation as part of client certificate? 2595 * If so, set ecdh_clnt_cert to 1. 2596 */ 2597 if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL)) 2598 { 2599 /* XXX: For now, we do not support client 2600 * authentication using ECDH certificates. 2601 * To add such support, one needs to add 2602 * code that checks for appropriate 2603 * conditions and sets ecdh_clnt_cert to 1. 2604 * For example, the cert have an ECC 2605 * key on the same curve as the server's 2606 * and the key should be authorized for 2607 * key agreement. 2608 * 2609 * One also needs to add code in ssl3_connect 2610 * to skip sending the certificate verify 2611 * message. 2612 * 2613 * if ((s->cert->key->privatekey != NULL) && 2614 * (s->cert->key->privatekey->type == 2615 * EVP_PKEY_EC) && ...) 2616 * ecdh_clnt_cert = 1; 2617 */ 2618 } 2619 2620 if (s->session->sess_cert->peer_ecdh_tmp != NULL) 2621 { 2622 tkey = s->session->sess_cert->peer_ecdh_tmp; 2623 } 2624 else 2625 { 2626 /* Get the Server Public Key from Cert */ 2627 srvr_pub_pkey = X509_get_pubkey(s->session-> \ 2628 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509); 2629 if ((srvr_pub_pkey == NULL) || 2630 (srvr_pub_pkey->type != EVP_PKEY_EC) || 2631 (srvr_pub_pkey->pkey.ec == NULL)) 2632 { 2633 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2634 ERR_R_INTERNAL_ERROR); 2635 goto err; 2636 } 2637 2638 tkey = srvr_pub_pkey->pkey.ec; 2639 } 2640 2641 srvr_group = EC_KEY_get0_group(tkey); 2642 srvr_ecpoint = EC_KEY_get0_public_key(tkey); 2643 2644 if ((srvr_group == NULL) || (srvr_ecpoint == NULL)) 2645 { 2646 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2647 ERR_R_INTERNAL_ERROR); 2648 goto err; 2649 } 2650 2651 if ((clnt_ecdh=EC_KEY_new()) == NULL) 2652 { 2653 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2654 goto err; 2655 } 2656 2657 if (!EC_KEY_set_group(clnt_ecdh, srvr_group)) 2658 { 2659 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB); 2660 goto err; 2661 } 2662 if (ecdh_clnt_cert) 2663 { 2664 /* Reuse key info from our certificate 2665 * We only need our private key to perform 2666 * the ECDH computation. 2667 */ 2668 const BIGNUM *priv_key; 2669 tkey = s->cert->key->privatekey->pkey.ec; 2670 priv_key = EC_KEY_get0_private_key(tkey); 2671 if (priv_key == NULL) 2672 { 2673 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2674 goto err; 2675 } 2676 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key)) 2677 { 2678 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB); 2679 goto err; 2680 } 2681 } 2682 else 2683 { 2684 /* Generate a new ECDH key pair */ 2685 if (!(EC_KEY_generate_key(clnt_ecdh))) 2686 { 2687 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB); 2688 goto err; 2689 } 2690 } 2691 2692 /* use the 'p' output buffer for the ECDH key, but 2693 * make sure to clear it out afterwards 2694 */ 2695 2696 field_size = EC_GROUP_get_degree(srvr_group); 2697 if (field_size <= 0) 2698 { 2699 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2700 ERR_R_ECDH_LIB); 2701 goto err; 2702 } 2703 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL); 2704 if (n <= 0) 2705 { 2706 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2707 ERR_R_ECDH_LIB); 2708 goto err; 2709 } 2710 2711 /* generate master key from the result */ 2712 s->session->master_key_length = s->method->ssl3_enc \ 2713 -> generate_master_secret(s, 2714 s->session->master_key, 2715 p, n); 2716 2717 memset(p, 0, n); /* clean up */ 2718 2719 if (ecdh_clnt_cert) 2720 { 2721 /* Send empty client key exch message */ 2722 n = 0; 2723 } 2724 else 2725 { 2726 /* First check the size of encoding and 2727 * allocate memory accordingly. 2728 */ 2729 encoded_pt_len = 2730 EC_POINT_point2oct(srvr_group, 2731 EC_KEY_get0_public_key(clnt_ecdh), 2732 POINT_CONVERSION_UNCOMPRESSED, 2733 NULL, 0, NULL); 2734 2735 encodedPoint = (unsigned char *) 2736 OPENSSL_malloc(encoded_pt_len * 2737 sizeof(unsigned char)); 2738 bn_ctx = BN_CTX_new(); 2739 if ((encodedPoint == NULL) || 2740 (bn_ctx == NULL)) 2741 { 2742 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2743 goto err; 2744 } 2745 2746 /* Encode the public key */ 2747 n = EC_POINT_point2oct(srvr_group, 2748 EC_KEY_get0_public_key(clnt_ecdh), 2749 POINT_CONVERSION_UNCOMPRESSED, 2750 encodedPoint, encoded_pt_len, bn_ctx); 2751 2752 *p = n; /* length of encoded point */ 2753 /* Encoded point will be copied here */ 2754 p += 1; 2755 /* copy the point */ 2756 memcpy((unsigned char *)p, encodedPoint, n); 2757 /* increment n to account for length field */ 2758 n += 1; 2759 } 2760 2761 /* Free allocated memory */ 2762 BN_CTX_free(bn_ctx); 2763 if (encodedPoint != NULL) OPENSSL_free(encodedPoint); 2764 if (clnt_ecdh != NULL) 2765 EC_KEY_free(clnt_ecdh); 2766 EVP_PKEY_free(srvr_pub_pkey); 2767 } 2768#endif /* !OPENSSL_NO_ECDH */ 2769 else if (alg_k & SSL_kGOST) 2770 { 2771 /* GOST key exchange message creation */ 2772 EVP_PKEY_CTX *pkey_ctx; 2773 X509 *peer_cert; 2774 size_t msglen; 2775 unsigned int md_len; 2776 int keytype; 2777 unsigned char premaster_secret[32],shared_ukm[32], tmp[256]; 2778 EVP_MD_CTX *ukm_hash; 2779 EVP_PKEY *pub_key; 2780 2781 /* Get server sertificate PKEY and create ctx from it */ 2782 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST01)].x509; 2783 if (!peer_cert) 2784 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST94)].x509; 2785 if (!peer_cert) { 2786 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER); 2787 goto err; 2788 } 2789 2790 pkey_ctx=EVP_PKEY_CTX_new(pub_key=X509_get_pubkey(peer_cert),NULL); 2791 /* If we have send a certificate, and certificate key 2792 2793 * parameters match those of server certificate, use 2794 * certificate key for key exchange 2795 */ 2796 2797 /* Otherwise, generate ephemeral key pair */ 2798 2799 EVP_PKEY_encrypt_init(pkey_ctx); 2800 /* Generate session key */ 2801 RAND_bytes(premaster_secret,32); 2802 /* If we have client certificate, use its secret as peer key */ 2803 if (s->s3->tmp.cert_req && s->cert->key->privatekey) { 2804 if (EVP_PKEY_derive_set_peer(pkey_ctx,s->cert->key->privatekey) <=0) { 2805 /* If there was an error - just ignore it. Ephemeral key 2806 * would be used 2807 */ 2808 ERR_clear_error(); 2809 } 2810 } 2811 /* Compute shared IV and store it in algorithm-specific 2812 * context data */ 2813 ukm_hash = EVP_MD_CTX_create(); 2814 EVP_DigestInit(ukm_hash,EVP_get_digestbynid(NID_id_GostR3411_94)); 2815 EVP_DigestUpdate(ukm_hash,s->s3->client_random,SSL3_RANDOM_SIZE); 2816 EVP_DigestUpdate(ukm_hash,s->s3->server_random,SSL3_RANDOM_SIZE); 2817 EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len); 2818 EVP_MD_CTX_destroy(ukm_hash); 2819 if (EVP_PKEY_CTX_ctrl(pkey_ctx,-1,EVP_PKEY_OP_ENCRYPT,EVP_PKEY_CTRL_SET_IV, 2820 8,shared_ukm)<0) { 2821 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2822 SSL_R_LIBRARY_BUG); 2823 goto err; 2824 } 2825 /* Make GOST keytransport blob message */ 2826 /*Encapsulate it into sequence */ 2827 *(p++)=V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED; 2828 msglen=255; 2829 if (EVP_PKEY_encrypt(pkey_ctx,tmp,&msglen,premaster_secret,32)<0) { 2830 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2831 SSL_R_LIBRARY_BUG); 2832 goto err; 2833 } 2834 if (msglen >= 0x80) 2835 { 2836 *(p++)=0x81; 2837 *(p++)= msglen & 0xff; 2838 n=msglen+3; 2839 } 2840 else 2841 { 2842 *(p++)= msglen & 0xff; 2843 n=msglen+2; 2844 } 2845 memcpy(p, tmp, msglen); 2846 /* Check if pubkey from client certificate was used */ 2847 if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0) 2848 { 2849 /* Set flag "skip certificate verify" */ 2850 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY; 2851 } 2852 EVP_PKEY_CTX_free(pkey_ctx); 2853 s->session->master_key_length= 2854 s->method->ssl3_enc->generate_master_secret(s, 2855 s->session->master_key,premaster_secret,32); 2856 EVP_PKEY_free(pub_key); 2857 2858 } 2859#ifndef OPENSSL_NO_SRP 2860 else if (alg_k & SSL_kSRP) 2861 { 2862 if (s->srp_ctx.A != NULL) 2863 { 2864 /* send off the data */ 2865 n=BN_num_bytes(s->srp_ctx.A); 2866 s2n(n,p); 2867 BN_bn2bin(s->srp_ctx.A,p); 2868 n+=2; 2869 } 2870 else 2871 { 2872 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 2873 goto err; 2874 } 2875 if (s->session->srp_username != NULL) 2876 OPENSSL_free(s->session->srp_username); 2877 s->session->srp_username = BUF_strdup(s->srp_ctx.login); 2878 if (s->session->srp_username == NULL) 2879 { 2880 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2881 ERR_R_MALLOC_FAILURE); 2882 goto err; 2883 } 2884 2885 if ((s->session->master_key_length = SRP_generate_client_master_secret(s,s->session->master_key))<0) 2886 { 2887 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 2888 goto err; 2889 } 2890 } 2891#endif 2892#ifndef OPENSSL_NO_PSK 2893 else if (alg_k & SSL_kPSK) 2894 { 2895 char identity[PSK_MAX_IDENTITY_LEN]; 2896 unsigned char *t = NULL; 2897 unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4]; 2898 unsigned int pre_ms_len = 0, psk_len = 0; 2899 int psk_err = 1; 2900 2901 n = 0; 2902 if (s->psk_client_callback == NULL) 2903 { 2904 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2905 SSL_R_PSK_NO_CLIENT_CB); 2906 goto err; 2907 } 2908 2909 psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint, 2910 identity, PSK_MAX_IDENTITY_LEN, 2911 psk_or_pre_ms, sizeof(psk_or_pre_ms)); 2912 if (psk_len > PSK_MAX_PSK_LEN) 2913 { 2914 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2915 ERR_R_INTERNAL_ERROR); 2916 goto psk_err; 2917 } 2918 else if (psk_len == 0) 2919 { 2920 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2921 SSL_R_PSK_IDENTITY_NOT_FOUND); 2922 goto psk_err; 2923 } 2924 2925 /* create PSK pre_master_secret */ 2926 pre_ms_len = 2+psk_len+2+psk_len; 2927 t = psk_or_pre_ms; 2928 memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len); 2929 s2n(psk_len, t); 2930 memset(t, 0, psk_len); 2931 t+=psk_len; 2932 s2n(psk_len, t); 2933 2934 if (s->session->psk_identity_hint != NULL) 2935 OPENSSL_free(s->session->psk_identity_hint); 2936 s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint); 2937 if (s->ctx->psk_identity_hint != NULL && 2938 s->session->psk_identity_hint == NULL) 2939 { 2940 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2941 ERR_R_MALLOC_FAILURE); 2942 goto psk_err; 2943 } 2944 2945 if (s->session->psk_identity != NULL) 2946 OPENSSL_free(s->session->psk_identity); 2947 s->session->psk_identity = BUF_strdup(identity); 2948 if (s->session->psk_identity == NULL) 2949 { 2950 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2951 ERR_R_MALLOC_FAILURE); 2952 goto psk_err; 2953 } 2954 2955 s->session->master_key_length = 2956 s->method->ssl3_enc->generate_master_secret(s, 2957 s->session->master_key, 2958 psk_or_pre_ms, pre_ms_len); 2959 n = strlen(identity); 2960 s2n(n, p); 2961 memcpy(p, identity, n); 2962 n+=2; 2963 psk_err = 0; 2964 psk_err: 2965 OPENSSL_cleanse(identity, PSK_MAX_IDENTITY_LEN); 2966 OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms)); 2967 if (psk_err != 0) 2968 { 2969 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); 2970 goto err; 2971 } 2972 } 2973#endif 2974 else 2975 { 2976 ssl3_send_alert(s, SSL3_AL_FATAL, 2977 SSL_AD_HANDSHAKE_FAILURE); 2978 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2979 ERR_R_INTERNAL_ERROR); 2980 goto err; 2981 } 2982 2983 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE; 2984 l2n3(n,d); 2985 2986 s->state=SSL3_ST_CW_KEY_EXCH_B; 2987 /* number of bytes to write */ 2988 s->init_num=n+4; 2989 s->init_off=0; 2990 } 2991 2992 /* SSL3_ST_CW_KEY_EXCH_B */ 2993 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 2994err: 2995#ifndef OPENSSL_NO_ECDH 2996 BN_CTX_free(bn_ctx); 2997 if (encodedPoint != NULL) OPENSSL_free(encodedPoint); 2998 if (clnt_ecdh != NULL) 2999 EC_KEY_free(clnt_ecdh); 3000 EVP_PKEY_free(srvr_pub_pkey); 3001#endif 3002 return(-1); 3003 } 3004 3005int ssl3_send_client_verify(SSL *s) 3006 { 3007 unsigned char *p,*d; 3008 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH]; 3009 EVP_PKEY *pkey; 3010 EVP_PKEY_CTX *pctx=NULL; 3011 EVP_MD_CTX mctx; 3012 unsigned u=0; 3013 unsigned long n; 3014 int j; 3015 3016 EVP_MD_CTX_init(&mctx); 3017 3018 if (s->state == SSL3_ST_CW_CERT_VRFY_A) 3019 { 3020 d=(unsigned char *)s->init_buf->data; 3021 p= &(d[4]); 3022 pkey=s->cert->key->privatekey; 3023/* Create context from key and test if sha1 is allowed as digest */ 3024 pctx = EVP_PKEY_CTX_new(pkey,NULL); 3025 EVP_PKEY_sign_init(pctx); 3026 if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1())>0) 3027 { 3028 if (TLS1_get_version(s) < TLS1_2_VERSION) 3029 s->method->ssl3_enc->cert_verify_mac(s, 3030 NID_sha1, 3031 &(data[MD5_DIGEST_LENGTH])); 3032 } 3033 else 3034 { 3035 ERR_clear_error(); 3036 } 3037 /* For TLS v1.2 send signature algorithm and signature 3038 * using agreed digest and cached handshake records. 3039 */ 3040 if (TLS1_get_version(s) >= TLS1_2_VERSION) 3041 { 3042 long hdatalen = 0; 3043 void *hdata; 3044 const EVP_MD *md = s->cert->key->digest; 3045 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, 3046 &hdata); 3047 if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md)) 3048 { 3049 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, 3050 ERR_R_INTERNAL_ERROR); 3051 goto err; 3052 } 3053 p += 2; 3054#ifdef SSL_DEBUG 3055 fprintf(stderr, "Using TLS 1.2 with client alg %s\n", 3056 EVP_MD_name(md)); 3057#endif 3058 if (!EVP_SignInit_ex(&mctx, md, NULL) 3059 || !EVP_SignUpdate(&mctx, hdata, hdatalen) 3060 || !EVP_SignFinal(&mctx, p + 2, &u, pkey)) 3061 { 3062 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, 3063 ERR_R_EVP_LIB); 3064 goto err; 3065 } 3066 s2n(u,p); 3067 n = u + 4; 3068 if (!ssl3_digest_cached_records(s)) 3069 goto err; 3070 } 3071 else 3072#ifndef OPENSSL_NO_RSA 3073 if (pkey->type == EVP_PKEY_RSA) 3074 { 3075 s->method->ssl3_enc->cert_verify_mac(s, 3076 NID_md5, 3077 &(data[0])); 3078 if (RSA_sign(NID_md5_sha1, data, 3079 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH, 3080 &(p[2]), &u, pkey->pkey.rsa) <= 0 ) 3081 { 3082 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB); 3083 goto err; 3084 } 3085 s2n(u,p); 3086 n=u+2; 3087 } 3088 else 3089#endif 3090#ifndef OPENSSL_NO_DSA 3091 if (pkey->type == EVP_PKEY_DSA) 3092 { 3093 if (!DSA_sign(pkey->save_type, 3094 &(data[MD5_DIGEST_LENGTH]), 3095 SHA_DIGEST_LENGTH,&(p[2]), 3096 (unsigned int *)&j,pkey->pkey.dsa)) 3097 { 3098 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB); 3099 goto err; 3100 } 3101 s2n(j,p); 3102 n=j+2; 3103 } 3104 else 3105#endif 3106#ifndef OPENSSL_NO_ECDSA 3107 if (pkey->type == EVP_PKEY_EC) 3108 { 3109 if (!ECDSA_sign(pkey->save_type, 3110 &(data[MD5_DIGEST_LENGTH]), 3111 SHA_DIGEST_LENGTH,&(p[2]), 3112 (unsigned int *)&j,pkey->pkey.ec)) 3113 { 3114 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, 3115 ERR_R_ECDSA_LIB); 3116 goto err; 3117 } 3118 s2n(j,p); 3119 n=j+2; 3120 } 3121 else 3122#endif 3123 if (pkey->type == NID_id_GostR3410_94 || pkey->type == NID_id_GostR3410_2001) 3124 { 3125 unsigned char signbuf[64]; 3126 int i; 3127 size_t sigsize=64; 3128 s->method->ssl3_enc->cert_verify_mac(s, 3129 NID_id_GostR3411_94, 3130 data); 3131 if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) { 3132 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, 3133 ERR_R_INTERNAL_ERROR); 3134 goto err; 3135 } 3136 for (i=63,j=0; i>=0; j++, i--) { 3137 p[2+j]=signbuf[i]; 3138 } 3139 s2n(j,p); 3140 n=j+2; 3141 } 3142 else 3143 { 3144 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR); 3145 goto err; 3146 } 3147 *(d++)=SSL3_MT_CERTIFICATE_VERIFY; 3148 l2n3(n,d); 3149 3150 s->state=SSL3_ST_CW_CERT_VRFY_B; 3151 s->init_num=(int)n+4; 3152 s->init_off=0; 3153 } 3154 EVP_MD_CTX_cleanup(&mctx); 3155 EVP_PKEY_CTX_free(pctx); 3156 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 3157err: 3158 EVP_MD_CTX_cleanup(&mctx); 3159 EVP_PKEY_CTX_free(pctx); 3160 return(-1); 3161 } 3162 3163int ssl3_send_client_certificate(SSL *s) 3164 { 3165 X509 *x509=NULL; 3166 EVP_PKEY *pkey=NULL; 3167 int i; 3168 unsigned long l; 3169 3170 if (s->state == SSL3_ST_CW_CERT_A) 3171 { 3172 if ((s->cert == NULL) || 3173 (s->cert->key->x509 == NULL) || 3174 (s->cert->key->privatekey == NULL)) 3175 s->state=SSL3_ST_CW_CERT_B; 3176 else 3177 s->state=SSL3_ST_CW_CERT_C; 3178 } 3179 3180 /* We need to get a client cert */ 3181 if (s->state == SSL3_ST_CW_CERT_B) 3182 { 3183 /* If we get an error, we need to 3184 * ssl->rwstate=SSL_X509_LOOKUP; return(-1); 3185 * We then get retied later */ 3186 i=0; 3187 i = ssl_do_client_cert_cb(s, &x509, &pkey); 3188 if (i < 0) 3189 { 3190 s->rwstate=SSL_X509_LOOKUP; 3191 return(-1); 3192 } 3193 s->rwstate=SSL_NOTHING; 3194 if ((i == 1) && (pkey != NULL) && (x509 != NULL)) 3195 { 3196 s->state=SSL3_ST_CW_CERT_B; 3197 if ( !SSL_use_certificate(s,x509) || 3198 !SSL_use_PrivateKey(s,pkey)) 3199 i=0; 3200 } 3201 else if (i == 1) 3202 { 3203 i=0; 3204 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); 3205 } 3206 3207 if (x509 != NULL) X509_free(x509); 3208 if (pkey != NULL) EVP_PKEY_free(pkey); 3209 if (i == 0) 3210 { 3211 if (s->version == SSL3_VERSION) 3212 { 3213 s->s3->tmp.cert_req=0; 3214 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE); 3215 return(1); 3216 } 3217 else 3218 { 3219 s->s3->tmp.cert_req=2; 3220 } 3221 } 3222 3223 /* Ok, we have a cert */ 3224 s->state=SSL3_ST_CW_CERT_C; 3225 } 3226 3227 if (s->state == SSL3_ST_CW_CERT_C) 3228 { 3229 s->state=SSL3_ST_CW_CERT_D; 3230 l=ssl3_output_cert_chain(s, 3231 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509); 3232 s->init_num=(int)l; 3233 s->init_off=0; 3234 } 3235 /* SSL3_ST_CW_CERT_D */ 3236 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 3237 } 3238 3239#define has_bits(i,m) (((i)&(m)) == (m)) 3240 3241int ssl3_check_cert_and_algorithm(SSL *s) 3242 { 3243 int i,idx; 3244 long alg_k,alg_a; 3245 EVP_PKEY *pkey=NULL; 3246 SESS_CERT *sc; 3247#ifndef OPENSSL_NO_RSA 3248 RSA *rsa; 3249#endif 3250#ifndef OPENSSL_NO_DH 3251 DH *dh; 3252#endif 3253 3254 alg_k=s->s3->tmp.new_cipher->algorithm_mkey; 3255 alg_a=s->s3->tmp.new_cipher->algorithm_auth; 3256 3257 /* we don't have a certificate */ 3258 if ((alg_a & (SSL_aDH|SSL_aNULL|SSL_aKRB5)) || (alg_k & SSL_kPSK)) 3259 return(1); 3260 3261 sc=s->session->sess_cert; 3262 if (sc == NULL) 3263 { 3264 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR); 3265 goto err; 3266 } 3267 3268#ifndef OPENSSL_NO_RSA 3269 rsa=s->session->sess_cert->peer_rsa_tmp; 3270#endif 3271#ifndef OPENSSL_NO_DH 3272 dh=s->session->sess_cert->peer_dh_tmp; 3273#endif 3274 3275 /* This is the passed certificate */ 3276 3277 idx=sc->peer_cert_type; 3278#ifndef OPENSSL_NO_ECDH 3279 if (idx == SSL_PKEY_ECC) 3280 { 3281 if (ssl_check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509, 3282 s) == 0) 3283 { /* check failed */ 3284 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT); 3285 goto f_err; 3286 } 3287 else 3288 { 3289 return 1; 3290 } 3291 } 3292#endif 3293 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509); 3294 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey); 3295 EVP_PKEY_free(pkey); 3296 3297 3298 /* Check that we have a certificate if we require one */ 3299 if ((alg_a & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN)) 3300 { 3301 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT); 3302 goto f_err; 3303 } 3304#ifndef OPENSSL_NO_DSA 3305 else if ((alg_a & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN)) 3306 { 3307 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT); 3308 goto f_err; 3309 } 3310#endif 3311#ifndef OPENSSL_NO_RSA 3312 if ((alg_k & SSL_kRSA) && 3313 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL))) 3314 { 3315 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT); 3316 goto f_err; 3317 } 3318#endif 3319#ifndef OPENSSL_NO_DH 3320 if ((alg_k & SSL_kEDH) && 3321 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL))) 3322 { 3323 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY); 3324 goto f_err; 3325 } 3326 else if ((alg_k & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA)) 3327 { 3328 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT); 3329 goto f_err; 3330 } 3331#ifndef OPENSSL_NO_DSA 3332 else if ((alg_k & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA)) 3333 { 3334 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT); 3335 goto f_err; 3336 } 3337#endif 3338#endif 3339 3340 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP)) 3341 { 3342#ifndef OPENSSL_NO_RSA 3343 if (alg_k & SSL_kRSA) 3344 { 3345 if (rsa == NULL 3346 || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) 3347 { 3348 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY); 3349 goto f_err; 3350 } 3351 } 3352 else 3353#endif 3354#ifndef OPENSSL_NO_DH 3355 if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) 3356 { 3357 if (dh == NULL 3358 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) 3359 { 3360 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY); 3361 goto f_err; 3362 } 3363 } 3364 else 3365#endif 3366 { 3367 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE); 3368 goto f_err; 3369 } 3370 } 3371 return(1); 3372f_err: 3373 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); 3374err: 3375 return(0); 3376 } 3377 3378#if !defined(OPENSSL_NO_TLSEXT) 3379# if !defined(OPENSSL_NO_NEXTPROTONEG) 3380int ssl3_send_next_proto(SSL *s) 3381 { 3382 unsigned int len, padding_len; 3383 unsigned char *d; 3384 3385 if (s->state == SSL3_ST_CW_NEXT_PROTO_A) 3386 { 3387 len = s->next_proto_negotiated_len; 3388 padding_len = 32 - ((len + 2) % 32); 3389 d = (unsigned char *)s->init_buf->data; 3390 d[4] = len; 3391 memcpy(d + 5, s->next_proto_negotiated, len); 3392 d[5 + len] = padding_len; 3393 memset(d + 6 + len, 0, padding_len); 3394 *(d++)=SSL3_MT_NEXT_PROTO; 3395 l2n3(2 + len + padding_len, d); 3396 s->state = SSL3_ST_CW_NEXT_PROTO_B; 3397 s->init_num = 4 + 2 + len + padding_len; 3398 s->init_off = 0; 3399 } 3400 3401 return ssl3_do_write(s, SSL3_RT_HANDSHAKE); 3402} 3403# endif /* !OPENSSL_NO_NEXTPROTONEG */ 3404 3405int ssl3_send_channel_id(SSL *s) 3406 { 3407 unsigned char *d; 3408 int ret = -1, public_key_len; 3409 EVP_MD_CTX md_ctx; 3410 size_t sig_len; 3411 ECDSA_SIG *sig = NULL; 3412 unsigned char *public_key = NULL, *derp, *der_sig = NULL; 3413 3414 if (s->state != SSL3_ST_CW_CHANNEL_ID_A) 3415 return ssl3_do_write(s, SSL3_RT_HANDSHAKE); 3416 3417 d = (unsigned char *)s->init_buf->data; 3418 *(d++)=SSL3_MT_ENCRYPTED_EXTENSIONS; 3419 l2n3(2 + 2 + TLSEXT_CHANNEL_ID_SIZE, d); 3420 s2n(TLSEXT_TYPE_channel_id, d); 3421 s2n(TLSEXT_CHANNEL_ID_SIZE, d); 3422 3423 EVP_MD_CTX_init(&md_ctx); 3424 3425 public_key_len = i2d_PublicKey(s->tlsext_channel_id_private, NULL); 3426 if (public_key_len <= 0) 3427 { 3428 SSLerr(SSL_F_SSL3_SEND_CHANNEL_ID,SSL_R_CANNOT_SERIALIZE_PUBLIC_KEY); 3429 goto err; 3430 } 3431 // i2d_PublicKey will produce an ANSI X9.62 public key which, for a 3432 // P-256 key, is 0x04 (meaning uncompressed) followed by the x and y 3433 // field elements as 32-byte, big-endian numbers. 3434 if (public_key_len != 65) 3435 { 3436 SSLerr(SSL_F_SSL3_SEND_CHANNEL_ID,SSL_R_CHANNEL_ID_NOT_P256); 3437 goto err; 3438 } 3439 public_key = OPENSSL_malloc(public_key_len); 3440 if (!public_key) 3441 { 3442 SSLerr(SSL_F_SSL3_SEND_CHANNEL_ID,ERR_R_MALLOC_FAILURE); 3443 goto err; 3444 } 3445 3446 derp = public_key; 3447 i2d_PublicKey(s->tlsext_channel_id_private, &derp); 3448 3449 if (EVP_DigestSignInit(&md_ctx, NULL, EVP_sha256(), NULL, 3450 s->tlsext_channel_id_private) != 1) 3451 { 3452 SSLerr(SSL_F_SSL3_SEND_CHANNEL_ID,SSL_R_EVP_DIGESTSIGNINIT_FAILED); 3453 goto err; 3454 } 3455 3456 if (!tls1_channel_id_hash(&md_ctx, s)) 3457 goto err; 3458 3459 if (!EVP_DigestSignFinal(&md_ctx, NULL, &sig_len)) 3460 { 3461 SSLerr(SSL_F_SSL3_SEND_CHANNEL_ID,SSL_R_EVP_DIGESTSIGNFINAL_FAILED); 3462 goto err; 3463 } 3464 3465 der_sig = OPENSSL_malloc(sig_len); 3466 if (!der_sig) 3467 { 3468 SSLerr(SSL_F_SSL3_SEND_CHANNEL_ID,ERR_R_MALLOC_FAILURE); 3469 goto err; 3470 } 3471 3472 if (!EVP_DigestSignFinal(&md_ctx, der_sig, &sig_len)) 3473 { 3474 SSLerr(SSL_F_SSL3_SEND_CHANNEL_ID,SSL_R_EVP_DIGESTSIGNFINAL_FAILED); 3475 goto err; 3476 } 3477 3478 derp = der_sig; 3479 sig = d2i_ECDSA_SIG(NULL, (const unsigned char**)&derp, sig_len); 3480 if (sig == NULL) 3481 { 3482 SSLerr(SSL_F_SSL3_SEND_CHANNEL_ID,SSL_R_D2I_ECDSA_SIG); 3483 goto err; 3484 } 3485 3486 // The first byte of public_key will be 0x4, denoting an uncompressed key. 3487 memcpy(d, public_key + 1, 64); 3488 d += 64; 3489 memset(d, 0, 2 * 32); 3490 BN_bn2bin(sig->r, d + 32 - BN_num_bytes(sig->r)); 3491 d += 32; 3492 BN_bn2bin(sig->s, d + 32 - BN_num_bytes(sig->s)); 3493 d += 32; 3494 3495 s->state = SSL3_ST_CW_CHANNEL_ID_B; 3496 s->init_num = 4 + 2 + 2 + TLSEXT_CHANNEL_ID_SIZE; 3497 s->init_off = 0; 3498 3499 ret = ssl3_do_write(s, SSL3_RT_HANDSHAKE); 3500 3501err: 3502 EVP_MD_CTX_cleanup(&md_ctx); 3503 if (public_key) 3504 OPENSSL_free(public_key); 3505 if (der_sig) 3506 OPENSSL_free(der_sig); 3507 if (sig) 3508 ECDSA_SIG_free(sig); 3509 3510 return ret; 3511 } 3512#endif /* !OPENSSL_NO_TLSEXT */ 3513 3514/* Check to see if handshake is full or resumed. Usually this is just a 3515 * case of checking to see if a cache hit has occurred. In the case of 3516 * session tickets we have to check the next message to be sure. 3517 */ 3518 3519#ifndef OPENSSL_NO_TLSEXT 3520int ssl3_check_finished(SSL *s) 3521 { 3522 int ok; 3523 long n; 3524 /* If we have no ticket it cannot be a resumed session. */ 3525 if (!s->session->tlsext_tick) 3526 return 1; 3527 /* this function is called when we really expect a Certificate 3528 * message, so permit appropriate message length */ 3529 n=s->method->ssl_get_message(s, 3530 SSL3_ST_CR_CERT_A, 3531 SSL3_ST_CR_CERT_B, 3532 -1, 3533 s->max_cert_list, 3534 &ok); 3535 if (!ok) return((int)n); 3536 s->s3->tmp.reuse_message = 1; 3537 if ((s->s3->tmp.message_type == SSL3_MT_FINISHED) 3538 || (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET)) 3539 return 2; 3540 3541 return 1; 3542 } 3543#endif 3544 3545int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey) 3546 { 3547 int i = 0; 3548#ifndef OPENSSL_NO_ENGINE 3549 if (s->ctx->client_cert_engine) 3550 { 3551 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s, 3552 SSL_get_client_CA_list(s), 3553 px509, ppkey, NULL, NULL, NULL); 3554 if (i != 0) 3555 return i; 3556 } 3557#endif 3558 if (s->ctx->client_cert_cb) 3559 i = s->ctx->client_cert_cb(s,px509,ppkey); 3560 return i; 3561 } 3562