s3_clnt.c revision de9675dad342fcf6fe0ed86d083c027e88e44b6b
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 non-RSA PSK */ 349 if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) && 350 !((s->s3->tmp.new_cipher->algorithm_auth & SSL_aPSK) && 351 !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kRSA))) 352 { 353 ret=ssl3_get_server_certificate(s); 354 if (ret <= 0) goto end; 355#ifndef OPENSSL_NO_TLSEXT 356 if (s->tlsext_status_expected) 357 s->state=SSL3_ST_CR_CERT_STATUS_A; 358 else 359 s->state=SSL3_ST_CR_KEY_EXCH_A; 360 } 361 else 362 { 363 skip = 1; 364 s->state=SSL3_ST_CR_KEY_EXCH_A; 365 } 366#else 367 } 368 else 369 skip=1; 370 371 s->state=SSL3_ST_CR_KEY_EXCH_A; 372#endif 373 s->init_num=0; 374 break; 375 376 case SSL3_ST_CR_KEY_EXCH_A: 377 case SSL3_ST_CR_KEY_EXCH_B: 378 ret=ssl3_get_key_exchange(s); 379 if (ret <= 0) goto end; 380 s->state=SSL3_ST_CR_CERT_REQ_A; 381 s->init_num=0; 382 383 /* at this point we check that we have the 384 * required stuff from the server */ 385 if (!ssl3_check_cert_and_algorithm(s)) 386 { 387 ret= -1; 388 goto end; 389 } 390 break; 391 392 case SSL3_ST_CR_CERT_REQ_A: 393 case SSL3_ST_CR_CERT_REQ_B: 394 ret=ssl3_get_certificate_request(s); 395 if (ret <= 0) goto end; 396 s->state=SSL3_ST_CR_SRVR_DONE_A; 397 s->init_num=0; 398 break; 399 400 case SSL3_ST_CR_SRVR_DONE_A: 401 case SSL3_ST_CR_SRVR_DONE_B: 402 ret=ssl3_get_server_done(s); 403 if (ret <= 0) goto end; 404#ifndef OPENSSL_NO_SRP 405 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) 406 { 407 if ((ret = SRP_Calc_A_param(s))<=0) 408 { 409 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_SRP_A_CALC); 410 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR); 411 goto end; 412 } 413 } 414#endif 415 if (s->s3->tmp.cert_req) 416 s->state=SSL3_ST_CW_CERT_A; 417 else 418 s->state=SSL3_ST_CW_KEY_EXCH_A; 419 s->init_num=0; 420 421 break; 422 423 case SSL3_ST_CW_CERT_A: 424 case SSL3_ST_CW_CERT_B: 425 case SSL3_ST_CW_CERT_C: 426 case SSL3_ST_CW_CERT_D: 427 ret=ssl3_send_client_certificate(s); 428 if (ret <= 0) goto end; 429 s->state=SSL3_ST_CW_KEY_EXCH_A; 430 s->init_num=0; 431 break; 432 433 case SSL3_ST_CW_KEY_EXCH_A: 434 case SSL3_ST_CW_KEY_EXCH_B: 435 ret=ssl3_send_client_key_exchange(s); 436 if (ret <= 0) goto end; 437 /* EAY EAY EAY need to check for DH fix cert 438 * sent back */ 439 /* For TLS, cert_req is set to 2, so a cert chain 440 * of nothing is sent, but no verify packet is sent */ 441 /* XXX: For now, we do not support client 442 * authentication in ECDH cipher suites with 443 * ECDH (rather than ECDSA) certificates. 444 * We need to skip the certificate verify 445 * message when client's ECDH public key is sent 446 * inside the client certificate. 447 */ 448 if (s->s3->tmp.cert_req == 1) 449 { 450 s->state=SSL3_ST_CW_CERT_VRFY_A; 451 } 452 else 453 { 454 s->state=SSL3_ST_CW_CHANGE_A; 455 s->s3->change_cipher_spec=0; 456 } 457 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) 458 { 459 s->state=SSL3_ST_CW_CHANGE_A; 460 s->s3->change_cipher_spec=0; 461 } 462 463 s->init_num=0; 464 break; 465 466 case SSL3_ST_CW_CERT_VRFY_A: 467 case SSL3_ST_CW_CERT_VRFY_B: 468 ret=ssl3_send_client_verify(s); 469 if (ret <= 0) goto end; 470 s->state=SSL3_ST_CW_CHANGE_A; 471 s->init_num=0; 472 s->s3->change_cipher_spec=0; 473 break; 474 475 case SSL3_ST_CW_CHANGE_A: 476 case SSL3_ST_CW_CHANGE_B: 477 ret=ssl3_send_change_cipher_spec(s, 478 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B); 479 if (ret <= 0) goto end; 480 481 s->state=SSL3_ST_CW_FINISHED_A; 482#if !defined(OPENSSL_NO_TLSEXT) 483 if (s->s3->tlsext_channel_id_valid) 484 s->state=SSL3_ST_CW_CHANNEL_ID_A; 485# if !defined(OPENSSL_NO_NEXTPROTONEG) 486 if (s->s3->next_proto_neg_seen) 487 s->state=SSL3_ST_CW_NEXT_PROTO_A; 488# endif 489#endif 490 s->init_num=0; 491 492 s->session->cipher=s->s3->tmp.new_cipher; 493#ifdef OPENSSL_NO_COMP 494 s->session->compress_meth=0; 495#else 496 if (s->s3->tmp.new_compression == NULL) 497 s->session->compress_meth=0; 498 else 499 s->session->compress_meth= 500 s->s3->tmp.new_compression->id; 501#endif 502 if (!s->method->ssl3_enc->setup_key_block(s)) 503 { 504 ret= -1; 505 goto end; 506 } 507 508 if (!s->method->ssl3_enc->change_cipher_state(s, 509 SSL3_CHANGE_CIPHER_CLIENT_WRITE)) 510 { 511 ret= -1; 512 goto end; 513 } 514 515 break; 516 517#if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG) 518 case SSL3_ST_CW_NEXT_PROTO_A: 519 case SSL3_ST_CW_NEXT_PROTO_B: 520 ret=ssl3_send_next_proto(s); 521 if (ret <= 0) goto end; 522 if (s->s3->tlsext_channel_id_valid) 523 s->state=SSL3_ST_CW_CHANNEL_ID_A; 524 else 525 s->state=SSL3_ST_CW_FINISHED_A; 526 break; 527#endif 528 529#if !defined(OPENSSL_NO_TLSEXT) 530 case SSL3_ST_CW_CHANNEL_ID_A: 531 case SSL3_ST_CW_CHANNEL_ID_B: 532 ret=ssl3_send_channel_id(s); 533 if (ret <= 0) goto end; 534 s->state=SSL3_ST_CW_FINISHED_A; 535 break; 536#endif 537 538 case SSL3_ST_CW_FINISHED_A: 539 case SSL3_ST_CW_FINISHED_B: 540 ret=ssl3_send_finished(s, 541 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B, 542 s->method->ssl3_enc->client_finished_label, 543 s->method->ssl3_enc->client_finished_label_len); 544 if (ret <= 0) goto end; 545 s->state=SSL3_ST_CW_FLUSH; 546 547 /* clear flags */ 548 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER; 549 if (s->hit) 550 { 551 s->s3->tmp.next_state=SSL_ST_OK; 552 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED) 553 { 554 s->state=SSL_ST_OK; 555 s->s3->flags|=SSL3_FLAGS_POP_BUFFER; 556 s->s3->delay_buf_pop_ret=0; 557 } 558 } 559 else 560 { 561 if ((SSL_get_mode(s) & SSL_MODE_HANDSHAKE_CUTTHROUGH) && SSL_get_cipher_bits(s, NULL) >= 128 562 && s->s3->previous_server_finished_len == 0 /* no cutthrough on renegotiation (would complicate the state machine) */ 563 ) 564 { 565 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED) 566 { 567 s->state=SSL3_ST_CUTTHROUGH_COMPLETE; 568 s->s3->flags|=SSL3_FLAGS_POP_BUFFER; 569 s->s3->delay_buf_pop_ret=0; 570 } 571 else 572 { 573 s->s3->tmp.next_state=SSL3_ST_CUTTHROUGH_COMPLETE; 574 } 575 } 576 else 577 { 578#ifndef OPENSSL_NO_TLSEXT 579 /* Allow NewSessionTicket if ticket expected */ 580 if (s->tlsext_ticket_expected) 581 s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A; 582 else 583#endif 584 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A; 585 } 586 } 587 s->init_num=0; 588 break; 589 590#ifndef OPENSSL_NO_TLSEXT 591 case SSL3_ST_CR_SESSION_TICKET_A: 592 case SSL3_ST_CR_SESSION_TICKET_B: 593 ret=ssl3_get_new_session_ticket(s); 594 if (ret <= 0) goto end; 595 s->state=SSL3_ST_CR_FINISHED_A; 596 s->init_num=0; 597 break; 598 599 case SSL3_ST_CR_CERT_STATUS_A: 600 case SSL3_ST_CR_CERT_STATUS_B: 601 ret=ssl3_get_cert_status(s); 602 if (ret <= 0) goto end; 603 s->state=SSL3_ST_CR_KEY_EXCH_A; 604 s->init_num=0; 605 break; 606#endif 607 608 case SSL3_ST_CR_FINISHED_A: 609 case SSL3_ST_CR_FINISHED_B: 610 611 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A, 612 SSL3_ST_CR_FINISHED_B); 613 if (ret <= 0) goto end; 614 615 if (s->hit) 616 s->state=SSL3_ST_CW_CHANGE_A; 617 else 618 s->state=SSL_ST_OK; 619 s->init_num=0; 620 break; 621 622 case SSL3_ST_CW_FLUSH: 623 s->rwstate=SSL_WRITING; 624 if (BIO_flush(s->wbio) <= 0) 625 { 626 ret= -1; 627 goto end; 628 } 629 s->rwstate=SSL_NOTHING; 630 s->state=s->s3->tmp.next_state; 631 break; 632 633 case SSL3_ST_CUTTHROUGH_COMPLETE: 634#ifndef OPENSSL_NO_TLSEXT 635 /* Allow NewSessionTicket if ticket expected */ 636 if (s->tlsext_ticket_expected) 637 s->state=SSL3_ST_CR_SESSION_TICKET_A; 638 else 639#endif 640 s->state=SSL3_ST_CR_FINISHED_A; 641 642 /* SSL_write() will take care of flushing buffered data if 643 * DELAY_CLIENT_FINISHED is set. 644 */ 645 if (!(s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)) 646 ssl_free_wbio_buffer(s); 647 ret = 1; 648 goto end; 649 /* break; */ 650 651 case SSL_ST_OK: 652 /* clean a few things up */ 653 ssl3_cleanup_key_block(s); 654 655 if (s->init_buf != NULL) 656 { 657 BUF_MEM_free(s->init_buf); 658 s->init_buf=NULL; 659 } 660 661 /* If we are not 'joining' the last two packets, 662 * remove the buffering now */ 663 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER)) 664 ssl_free_wbio_buffer(s); 665 /* else do it later in ssl3_write */ 666 667 s->init_num=0; 668 s->renegotiate=0; 669 s->new_session=0; 670 671 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT); 672 if (s->hit) s->ctx->stats.sess_hit++; 673 674 ret=1; 675 /* s->server=0; */ 676 s->handshake_func=ssl3_connect; 677 s->ctx->stats.sess_connect_good++; 678 679 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1); 680 681 goto end; 682 /* break; */ 683 684 default: 685 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE); 686 ret= -1; 687 goto end; 688 /* break; */ 689 } 690 691 /* did we do anything */ 692 if (!s->s3->tmp.reuse_message && !skip) 693 { 694 if (s->debug) 695 { 696 if ((ret=BIO_flush(s->wbio)) <= 0) 697 goto end; 698 } 699 700 if ((cb != NULL) && (s->state != state)) 701 { 702 new_state=s->state; 703 s->state=state; 704 cb(s,SSL_CB_CONNECT_LOOP,1); 705 s->state=new_state; 706 } 707 } 708 skip=0; 709 } 710end: 711 s->in_handshake--; 712 if (buf != NULL) 713 BUF_MEM_free(buf); 714 if (cb != NULL) 715 cb(s,SSL_CB_CONNECT_EXIT,ret); 716 return(ret); 717 } 718 719 720int ssl3_client_hello(SSL *s) 721 { 722 unsigned char *buf; 723 unsigned char *p,*d; 724 int i; 725 unsigned long l; 726#ifndef OPENSSL_NO_COMP 727 int j; 728 SSL_COMP *comp; 729#endif 730 731 buf=(unsigned char *)s->init_buf->data; 732 if (s->state == SSL3_ST_CW_CLNT_HELLO_A) 733 { 734 SSL_SESSION *sess = s->session; 735 if ((sess == NULL) || 736 (sess->ssl_version != s->version) || 737#ifdef OPENSSL_NO_TLSEXT 738 !sess->session_id_length || 739#else 740 (!sess->session_id_length && !sess->tlsext_tick) || 741#endif 742 (sess->not_resumable)) 743 { 744 if (!s->session_creation_enabled) 745 { 746 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); 747 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_SESSION_MAY_NOT_BE_CREATED); 748 goto err; 749 } 750 if (!ssl_get_new_session(s,0)) 751 goto err; 752 } 753 /* else use the pre-loaded session */ 754 755 p=s->s3->client_random; 756 757 if (ssl_fill_hello_random(s, 0, p, SSL3_RANDOM_SIZE) <= 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_auth & SSL_aPSK) 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_a & SSL_aPSK) 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 s->ctx->psk_identity_hint = NULL; 1437 if (i != 0) 1438 { 1439 /* Store PSK identity hint for later use, hint is used 1440 * in ssl3_send_client_key_exchange. Assume that the 1441 * maximum length of a PSK identity hint can be as 1442 * long as the maximum length of a PSK identity. */ 1443 if (i > PSK_MAX_IDENTITY_LEN) 1444 { 1445 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1446 SSL_R_DATA_LENGTH_TOO_LONG); 1447 goto f_err; 1448 } 1449 if (param_len > n) 1450 { 1451 al=SSL_AD_DECODE_ERROR; 1452 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1453 SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH); 1454 goto f_err; 1455 } 1456 /* If received PSK identity hint contains NULL 1457 * characters, the hint is truncated from the first 1458 * NULL. p may not be ending with NULL, so create a 1459 * NULL-terminated string. */ 1460 memcpy(tmp_id_hint, p, i); 1461 memset(tmp_id_hint+i, 0, PSK_MAX_IDENTITY_LEN+1-i); 1462 if (s->ctx->psk_identity_hint != NULL) 1463 OPENSSL_free(s->ctx->psk_identity_hint); 1464 s->ctx->psk_identity_hint = BUF_strdup(tmp_id_hint); 1465 if (s->ctx->psk_identity_hint == NULL) 1466 { 1467 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); 1468 goto f_err; 1469 } 1470 } 1471 p+=i; 1472 n-=param_len; 1473 } 1474#endif /* !OPENSSL_NO_PSK */ 1475 1476 if (0) {} 1477#ifndef OPENSSL_NO_SRP 1478 else if (alg_k & SSL_kSRP) 1479 { 1480 n2s(p,i); 1481 param_len=i+2; 1482 if (param_len > n) 1483 { 1484 al=SSL_AD_DECODE_ERROR; 1485 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_N_LENGTH); 1486 goto f_err; 1487 } 1488 if (!(s->srp_ctx.N=BN_bin2bn(p,i,NULL))) 1489 { 1490 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1491 goto err; 1492 } 1493 p+=i; 1494 1495 n2s(p,i); 1496 param_len+=i+2; 1497 if (param_len > n) 1498 { 1499 al=SSL_AD_DECODE_ERROR; 1500 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_G_LENGTH); 1501 goto f_err; 1502 } 1503 if (!(s->srp_ctx.g=BN_bin2bn(p,i,NULL))) 1504 { 1505 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1506 goto err; 1507 } 1508 p+=i; 1509 1510 i = (unsigned int)(p[0]); 1511 p++; 1512 param_len+=i+1; 1513 if (param_len > n) 1514 { 1515 al=SSL_AD_DECODE_ERROR; 1516 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_S_LENGTH); 1517 goto f_err; 1518 } 1519 if (!(s->srp_ctx.s=BN_bin2bn(p,i,NULL))) 1520 { 1521 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1522 goto err; 1523 } 1524 p+=i; 1525 1526 n2s(p,i); 1527 param_len+=i+2; 1528 if (param_len > n) 1529 { 1530 al=SSL_AD_DECODE_ERROR; 1531 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_B_LENGTH); 1532 goto f_err; 1533 } 1534 if (!(s->srp_ctx.B=BN_bin2bn(p,i,NULL))) 1535 { 1536 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1537 goto err; 1538 } 1539 p+=i; 1540 n-=param_len; 1541 1542/* We must check if there is a certificate */ 1543#ifndef OPENSSL_NO_RSA 1544 if (alg_a & SSL_aRSA) 1545 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1546#else 1547 if (0) 1548 ; 1549#endif 1550#ifndef OPENSSL_NO_DSA 1551 else if (alg_a & SSL_aDSS) 1552 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509); 1553#endif 1554 } 1555#endif /* !OPENSSL_NO_SRP */ 1556#ifndef OPENSSL_NO_RSA 1557 else if (alg_k & SSL_kRSA) 1558 { 1559 if ((rsa=RSA_new()) == NULL) 1560 { 1561 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1562 goto err; 1563 } 1564 n2s(p,i); 1565 param_len=i+2; 1566 if (param_len > n) 1567 { 1568 al=SSL_AD_DECODE_ERROR; 1569 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH); 1570 goto f_err; 1571 } 1572 if (!(rsa->n=BN_bin2bn(p,i,rsa->n))) 1573 { 1574 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1575 goto err; 1576 } 1577 p+=i; 1578 1579 n2s(p,i); 1580 param_len+=i+2; 1581 if (param_len > n) 1582 { 1583 al=SSL_AD_DECODE_ERROR; 1584 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH); 1585 goto f_err; 1586 } 1587 if (!(rsa->e=BN_bin2bn(p,i,rsa->e))) 1588 { 1589 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1590 goto err; 1591 } 1592 p+=i; 1593 n-=param_len; 1594 1595 /* this should be because we are using an export cipher */ 1596 if (alg_a & SSL_aRSA) 1597 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1598 else 1599 { 1600 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1601 goto err; 1602 } 1603 s->session->sess_cert->peer_rsa_tmp=rsa; 1604 rsa=NULL; 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#endif /* !OPENSSL_NO_ECDH */ 1787 1788 else if (!(alg_k & SSL_kPSK)) 1789 { 1790 al=SSL_AD_UNEXPECTED_MESSAGE; 1791 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE); 1792 goto f_err; 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) && 1899 /* Among PSK ciphers only RSA_PSK needs a public key */ 1900 !((alg_a & SSL_aPSK) && !(alg_k & SSL_kRSA))) 1901 { 1902 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1903 goto err; 1904 } 1905 /* still data left over */ 1906 if (n != 0) 1907 { 1908 al=SSL_AD_DECODE_ERROR; 1909 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE); 1910 goto f_err; 1911 } 1912 } 1913 EVP_PKEY_free(pkey); 1914 EVP_MD_CTX_cleanup(&md_ctx); 1915 return(1); 1916f_err: 1917 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1918err: 1919 EVP_PKEY_free(pkey); 1920#ifndef OPENSSL_NO_RSA 1921 if (rsa != NULL) 1922 RSA_free(rsa); 1923#endif 1924#ifndef OPENSSL_NO_DH 1925 if (dh != NULL) 1926 DH_free(dh); 1927#endif 1928#ifndef OPENSSL_NO_ECDH 1929 BN_CTX_free(bn_ctx); 1930 EC_POINT_free(srvr_ecpoint); 1931 if (ecdh != NULL) 1932 EC_KEY_free(ecdh); 1933#endif 1934 EVP_MD_CTX_cleanup(&md_ctx); 1935 return(-1); 1936 } 1937 1938int ssl3_get_certificate_request(SSL *s) 1939 { 1940 int ok,ret=0; 1941 unsigned long n,nc,l; 1942 unsigned int llen, ctype_num,i; 1943 X509_NAME *xn=NULL; 1944 const unsigned char *p,*q; 1945 unsigned char *d; 1946 STACK_OF(X509_NAME) *ca_sk=NULL; 1947 1948 n=s->method->ssl_get_message(s, 1949 SSL3_ST_CR_CERT_REQ_A, 1950 SSL3_ST_CR_CERT_REQ_B, 1951 -1, 1952 s->max_cert_list, 1953 &ok); 1954 1955 if (!ok) return((int)n); 1956 1957 s->s3->tmp.cert_req=0; 1958 1959 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE) 1960 { 1961 s->s3->tmp.reuse_message=1; 1962 /* If we get here we don't need any cached handshake records 1963 * as we wont be doing client auth. 1964 */ 1965 if (s->s3->handshake_buffer) 1966 { 1967 if (!ssl3_digest_cached_records(s)) 1968 goto err; 1969 } 1970 return(1); 1971 } 1972 1973 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST) 1974 { 1975 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 1976 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE); 1977 goto err; 1978 } 1979 1980 /* TLS does not like anon-DH with client cert */ 1981 if (s->version > SSL3_VERSION) 1982 { 1983 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) 1984 { 1985 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 1986 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER); 1987 goto err; 1988 } 1989 } 1990 1991 p=d=(unsigned char *)s->init_msg; 1992 1993 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL) 1994 { 1995 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE); 1996 goto err; 1997 } 1998 1999 /* get the certificate types */ 2000 ctype_num= *(p++); 2001 if (ctype_num > SSL3_CT_NUMBER) 2002 ctype_num=SSL3_CT_NUMBER; 2003 for (i=0; i<ctype_num; i++) 2004 s->s3->tmp.ctype[i]= p[i]; 2005 p+=ctype_num; 2006 if (TLS1_get_version(s) >= TLS1_2_VERSION) 2007 { 2008 n2s(p, llen); 2009 /* Check we have enough room for signature algorithms and 2010 * following length value. 2011 */ 2012 if ((unsigned long)(p - d + llen + 2) > n) 2013 { 2014 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 2015 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_DATA_LENGTH_TOO_LONG); 2016 goto err; 2017 } 2018 if (llen & 1) 2019 { 2020 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 2021 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_SIGNATURE_ALGORITHMS_ERROR); 2022 goto err; 2023 } 2024 tls1_process_sigalgs(s, p, llen); 2025 p += llen; 2026 } 2027 2028 /* get the CA RDNs */ 2029 n2s(p,llen); 2030#if 0 2031{ 2032FILE *out; 2033out=fopen("/tmp/vsign.der","w"); 2034fwrite(p,1,llen,out); 2035fclose(out); 2036} 2037#endif 2038 2039 if ((unsigned long)(p - d + llen) != n) 2040 { 2041 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 2042 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH); 2043 goto err; 2044 } 2045 2046 for (nc=0; nc<llen; ) 2047 { 2048 n2s(p,l); 2049 if ((l+nc+2) > llen) 2050 { 2051 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG)) 2052 goto cont; /* netscape bugs */ 2053 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 2054 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG); 2055 goto err; 2056 } 2057 2058 q=p; 2059 2060 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL) 2061 { 2062 /* If netscape tolerance is on, ignore errors */ 2063 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG) 2064 goto cont; 2065 else 2066 { 2067 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 2068 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB); 2069 goto err; 2070 } 2071 } 2072 2073 if (q != (p+l)) 2074 { 2075 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 2076 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH); 2077 goto err; 2078 } 2079 if (!sk_X509_NAME_push(ca_sk,xn)) 2080 { 2081 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE); 2082 goto err; 2083 } 2084 2085 p+=l; 2086 nc+=l+2; 2087 } 2088 2089 if (0) 2090 { 2091cont: 2092 ERR_clear_error(); 2093 } 2094 2095 /* we should setup a certificate to return.... */ 2096 s->s3->tmp.cert_req=1; 2097 s->s3->tmp.ctype_num=ctype_num; 2098 if (s->s3->tmp.ca_names != NULL) 2099 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free); 2100 s->s3->tmp.ca_names=ca_sk; 2101 ca_sk=NULL; 2102 2103 ret=1; 2104err: 2105 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free); 2106 return(ret); 2107 } 2108 2109static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b) 2110 { 2111 return(X509_NAME_cmp(*a,*b)); 2112 } 2113#ifndef OPENSSL_NO_TLSEXT 2114int ssl3_get_new_session_ticket(SSL *s) 2115 { 2116 int ok,al,ret=0, ticklen; 2117 long n; 2118 const unsigned char *p; 2119 unsigned char *d; 2120 2121 n=s->method->ssl_get_message(s, 2122 SSL3_ST_CR_SESSION_TICKET_A, 2123 SSL3_ST_CR_SESSION_TICKET_B, 2124 -1, 2125 16384, 2126 &ok); 2127 2128 if (!ok) 2129 return((int)n); 2130 2131 if (s->s3->tmp.message_type == SSL3_MT_FINISHED) 2132 { 2133 s->s3->tmp.reuse_message=1; 2134 return(1); 2135 } 2136 if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET) 2137 { 2138 al=SSL_AD_UNEXPECTED_MESSAGE; 2139 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_BAD_MESSAGE_TYPE); 2140 goto f_err; 2141 } 2142 if (n < 6) 2143 { 2144 /* need at least ticket_lifetime_hint + ticket length */ 2145 al = SSL_AD_DECODE_ERROR; 2146 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH); 2147 goto f_err; 2148 } 2149 2150 p=d=(unsigned char *)s->init_msg; 2151 n2l(p, s->session->tlsext_tick_lifetime_hint); 2152 n2s(p, ticklen); 2153 /* ticket_lifetime_hint + ticket_length + ticket */ 2154 if (ticklen + 6 != n) 2155 { 2156 al = SSL_AD_DECODE_ERROR; 2157 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH); 2158 goto f_err; 2159 } 2160 if (s->session->tlsext_tick) 2161 { 2162 OPENSSL_free(s->session->tlsext_tick); 2163 s->session->tlsext_ticklen = 0; 2164 } 2165 s->session->tlsext_tick = OPENSSL_malloc(ticklen); 2166 if (!s->session->tlsext_tick) 2167 { 2168 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE); 2169 goto err; 2170 } 2171 memcpy(s->session->tlsext_tick, p, ticklen); 2172 s->session->tlsext_ticklen = ticklen; 2173 /* There are two ways to detect a resumed ticket sesion. 2174 * One is to set an appropriate session ID and then the server 2175 * must return a match in ServerHello. This allows the normal 2176 * client session ID matching to work and we know much 2177 * earlier that the ticket has been accepted. 2178 * 2179 * The other way is to set zero length session ID when the 2180 * ticket is presented and rely on the handshake to determine 2181 * session resumption. 2182 * 2183 * We choose the former approach because this fits in with 2184 * assumptions elsewhere in OpenSSL. The session ID is set 2185 * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the 2186 * ticket. 2187 */ 2188 EVP_Digest(p, ticklen, 2189 s->session->session_id, &s->session->session_id_length, 2190#ifndef OPENSSL_NO_SHA256 2191 EVP_sha256(), NULL); 2192#else 2193 EVP_sha1(), NULL); 2194#endif 2195 ret=1; 2196 return(ret); 2197f_err: 2198 ssl3_send_alert(s,SSL3_AL_FATAL,al); 2199err: 2200 return(-1); 2201 } 2202 2203int ssl3_get_cert_status(SSL *s) 2204 { 2205 int ok, al; 2206 unsigned long resplen,n; 2207 const unsigned char *p; 2208 2209 n=s->method->ssl_get_message(s, 2210 SSL3_ST_CR_CERT_STATUS_A, 2211 SSL3_ST_CR_CERT_STATUS_B, 2212 SSL3_MT_CERTIFICATE_STATUS, 2213 16384, 2214 &ok); 2215 2216 if (!ok) return((int)n); 2217 if (n < 4) 2218 { 2219 /* need at least status type + length */ 2220 al = SSL_AD_DECODE_ERROR; 2221 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH); 2222 goto f_err; 2223 } 2224 p = (unsigned char *)s->init_msg; 2225 if (*p++ != TLSEXT_STATUSTYPE_ocsp) 2226 { 2227 al = SSL_AD_DECODE_ERROR; 2228 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_UNSUPPORTED_STATUS_TYPE); 2229 goto f_err; 2230 } 2231 n2l3(p, resplen); 2232 if (resplen + 4 != n) 2233 { 2234 al = SSL_AD_DECODE_ERROR; 2235 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH); 2236 goto f_err; 2237 } 2238 if (s->tlsext_ocsp_resp) 2239 OPENSSL_free(s->tlsext_ocsp_resp); 2240 s->tlsext_ocsp_resp = BUF_memdup(p, resplen); 2241 if (!s->tlsext_ocsp_resp) 2242 { 2243 al = SSL_AD_INTERNAL_ERROR; 2244 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE); 2245 goto f_err; 2246 } 2247 s->tlsext_ocsp_resplen = resplen; 2248 if (s->ctx->tlsext_status_cb) 2249 { 2250 int ret; 2251 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg); 2252 if (ret == 0) 2253 { 2254 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE; 2255 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_INVALID_STATUS_RESPONSE); 2256 goto f_err; 2257 } 2258 if (ret < 0) 2259 { 2260 al = SSL_AD_INTERNAL_ERROR; 2261 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE); 2262 goto f_err; 2263 } 2264 } 2265 return 1; 2266f_err: 2267 ssl3_send_alert(s,SSL3_AL_FATAL,al); 2268 return(-1); 2269 } 2270#endif 2271 2272int ssl3_get_server_done(SSL *s) 2273 { 2274 int ok,ret=0; 2275 long n; 2276 2277 n=s->method->ssl_get_message(s, 2278 SSL3_ST_CR_SRVR_DONE_A, 2279 SSL3_ST_CR_SRVR_DONE_B, 2280 SSL3_MT_SERVER_DONE, 2281 30, /* should be very small, like 0 :-) */ 2282 &ok); 2283 2284 if (!ok) return((int)n); 2285 if (n > 0) 2286 { 2287 /* should contain no data */ 2288 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 2289 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH); 2290 return -1; 2291 } 2292 ret=1; 2293 return(ret); 2294 } 2295 2296 2297int ssl3_send_client_key_exchange(SSL *s) 2298 { 2299 unsigned char *p,*d; 2300 int n; 2301 unsigned long alg_k; 2302 unsigned long alg_a; 2303#ifndef OPENSSL_NO_RSA 2304 unsigned char *q; 2305 EVP_PKEY *pkey=NULL; 2306#endif 2307#ifndef OPENSSL_NO_KRB5 2308 KSSL_ERR kssl_err; 2309#endif /* OPENSSL_NO_KRB5 */ 2310#ifndef OPENSSL_NO_ECDH 2311 EC_KEY *clnt_ecdh = NULL; 2312 const EC_POINT *srvr_ecpoint = NULL; 2313 EVP_PKEY *srvr_pub_pkey = NULL; 2314 unsigned char *encodedPoint = NULL; 2315 int encoded_pt_len = 0; 2316 BN_CTX * bn_ctx = NULL; 2317#ifndef OPENSSL_NO_PSK 2318 unsigned int psk_len = 0; 2319 unsigned char psk[PSK_MAX_PSK_LEN]; 2320#endif /* OPENSSL_NO_PSK */ 2321#endif /* OPENSSL_NO_ECDH */ 2322 2323 if (s->state == SSL3_ST_CW_KEY_EXCH_A) 2324 { 2325 d=(unsigned char *)s->init_buf->data; 2326 p= &(d[4]); 2327 2328 alg_k=s->s3->tmp.new_cipher->algorithm_mkey; 2329 alg_a=s->s3->tmp.new_cipher->algorithm_auth; 2330 2331#ifndef OPENSSL_NO_PSK 2332 if (alg_a & SSL_aPSK) 2333 { 2334 char identity[PSK_MAX_IDENTITY_LEN]; 2335 unsigned char *t = NULL; 2336 unsigned char pre_ms[PSK_MAX_PSK_LEN*2+4]; 2337 unsigned int pre_ms_len = 0; 2338 int psk_err = 1; 2339 2340 n = 0; 2341 if (s->psk_client_callback == NULL) 2342 { 2343 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2344 SSL_R_PSK_NO_CLIENT_CB); 2345 goto err; 2346 } 2347 2348 psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint, 2349 identity, PSK_MAX_IDENTITY_LEN, psk, sizeof(psk)); 2350 if (psk_len > PSK_MAX_PSK_LEN) 2351 { 2352 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2353 ERR_R_INTERNAL_ERROR); 2354 goto psk_err; 2355 } 2356 else if (psk_len == 0) 2357 { 2358 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2359 SSL_R_PSK_IDENTITY_NOT_FOUND); 2360 goto psk_err; 2361 } 2362 2363 if (!(alg_k & SSL_kEECDH)) 2364 { 2365 /* Create the shared secret now if we're not using ECDHE-PSK.*/ 2366 pre_ms_len = 2+psk_len+2+psk_len; 2367 t = pre_ms; 2368 s2n(psk_len, t); 2369 memset(t, 0, psk_len); 2370 t+=psk_len; 2371 s2n(psk_len, t); 2372 memcpy(t, psk, psk_len); 2373 2374 s->session->master_key_length = 2375 s->method->ssl3_enc->generate_master_secret(s, 2376 s->session->master_key, 2377 pre_ms, pre_ms_len); 2378 n = strlen(identity); 2379 s2n(n, p); 2380 memcpy(p, identity, n); 2381 n += 2; 2382 } 2383 2384 if (s->session->psk_identity_hint != NULL) 2385 OPENSSL_free(s->session->psk_identity_hint); 2386 s->session->psk_identity_hint = NULL; 2387 if (s->ctx->psk_identity_hint) 2388 { 2389 s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint); 2390 if (s->ctx->psk_identity_hint != NULL && 2391 s->session->psk_identity_hint == NULL) 2392 { 2393 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2394 ERR_R_MALLOC_FAILURE); 2395 goto psk_err; 2396 } 2397 } 2398 2399 if (s->session->psk_identity != NULL) 2400 OPENSSL_free(s->session->psk_identity); 2401 s->session->psk_identity = BUF_strdup(identity); 2402 if (s->session->psk_identity == NULL) 2403 { 2404 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2405 ERR_R_MALLOC_FAILURE); 2406 goto psk_err; 2407 } 2408 psk_err = 0; 2409 psk_err: 2410 OPENSSL_cleanse(identity, PSK_MAX_IDENTITY_LEN); 2411 OPENSSL_cleanse(pre_ms, sizeof(pre_ms)); 2412 if (psk_err != 0) 2413 { 2414 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); 2415 goto err; 2416 } 2417 } 2418#endif 2419 /* Fool emacs indentation */ 2420 if (0) {} 2421#ifndef OPENSSL_NO_RSA 2422 else if (alg_k & SSL_kRSA) 2423 { 2424 RSA *rsa; 2425 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; 2426 2427 if (s->session->sess_cert->peer_rsa_tmp != NULL) 2428 rsa=s->session->sess_cert->peer_rsa_tmp; 2429 else 2430 { 2431 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 2432 if ((pkey == NULL) || 2433 (pkey->type != EVP_PKEY_RSA) || 2434 (pkey->pkey.rsa == NULL)) 2435 { 2436 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 2437 goto err; 2438 } 2439 rsa=pkey->pkey.rsa; 2440 EVP_PKEY_free(pkey); 2441 } 2442 2443 tmp_buf[0]=s->client_version>>8; 2444 tmp_buf[1]=s->client_version&0xff; 2445 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0) 2446 goto err; 2447 2448 s->session->master_key_length=sizeof tmp_buf; 2449 2450 q=p; 2451 /* Fix buf for TLS and beyond */ 2452 if (s->version > SSL3_VERSION) 2453 p+=2; 2454 n=RSA_public_encrypt(sizeof tmp_buf, 2455 tmp_buf,p,rsa,RSA_PKCS1_PADDING); 2456#ifdef PKCS1_CHECK 2457 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++; 2458 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70; 2459#endif 2460 if (n <= 0) 2461 { 2462 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT); 2463 goto err; 2464 } 2465 2466 /* Fix buf for TLS and beyond */ 2467 if (s->version > SSL3_VERSION) 2468 { 2469 s2n(n,q); 2470 n+=2; 2471 } 2472 2473 s->session->master_key_length= 2474 s->method->ssl3_enc->generate_master_secret(s, 2475 s->session->master_key, 2476 tmp_buf,sizeof tmp_buf); 2477 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf); 2478 } 2479#endif 2480#ifndef OPENSSL_NO_KRB5 2481 else if (alg_k & SSL_kKRB5) 2482 { 2483 krb5_error_code krb5rc; 2484 KSSL_CTX *kssl_ctx = s->kssl_ctx; 2485 /* krb5_data krb5_ap_req; */ 2486 krb5_data *enc_ticket; 2487 krb5_data authenticator, *authp = NULL; 2488 EVP_CIPHER_CTX ciph_ctx; 2489 const EVP_CIPHER *enc = NULL; 2490 unsigned char iv[EVP_MAX_IV_LENGTH]; 2491 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; 2492 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH 2493 + EVP_MAX_IV_LENGTH]; 2494 int padl, outl = sizeof(epms); 2495 2496 EVP_CIPHER_CTX_init(&ciph_ctx); 2497 2498#ifdef KSSL_DEBUG 2499 printf("ssl3_send_client_key_exchange(%lx & %lx)\n", 2500 alg_k, SSL_kKRB5); 2501#endif /* KSSL_DEBUG */ 2502 2503 authp = NULL; 2504#ifdef KRB5SENDAUTH 2505 if (KRB5SENDAUTH) authp = &authenticator; 2506#endif /* KRB5SENDAUTH */ 2507 2508 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp, 2509 &kssl_err); 2510 enc = kssl_map_enc(kssl_ctx->enctype); 2511 if (enc == NULL) 2512 goto err; 2513#ifdef KSSL_DEBUG 2514 { 2515 printf("kssl_cget_tkt rtn %d\n", krb5rc); 2516 if (krb5rc && kssl_err.text) 2517 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text); 2518 } 2519#endif /* KSSL_DEBUG */ 2520 2521 if (krb5rc) 2522 { 2523 ssl3_send_alert(s,SSL3_AL_FATAL, 2524 SSL_AD_HANDSHAKE_FAILURE); 2525 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2526 kssl_err.reason); 2527 goto err; 2528 } 2529 2530 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ 2531 ** in place of RFC 2712 KerberosWrapper, as in: 2532 ** 2533 ** Send ticket (copy to *p, set n = length) 2534 ** n = krb5_ap_req.length; 2535 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length); 2536 ** if (krb5_ap_req.data) 2537 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req); 2538 ** 2539 ** Now using real RFC 2712 KerberosWrapper 2540 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>) 2541 ** Note: 2712 "opaque" types are here replaced 2542 ** with a 2-byte length followed by the value. 2543 ** Example: 2544 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms 2545 ** Where "xx xx" = length bytes. Shown here with 2546 ** optional authenticator omitted. 2547 */ 2548 2549 /* KerberosWrapper.Ticket */ 2550 s2n(enc_ticket->length,p); 2551 memcpy(p, enc_ticket->data, enc_ticket->length); 2552 p+= enc_ticket->length; 2553 n = enc_ticket->length + 2; 2554 2555 /* KerberosWrapper.Authenticator */ 2556 if (authp && authp->length) 2557 { 2558 s2n(authp->length,p); 2559 memcpy(p, authp->data, authp->length); 2560 p+= authp->length; 2561 n+= authp->length + 2; 2562 2563 free(authp->data); 2564 authp->data = NULL; 2565 authp->length = 0; 2566 } 2567 else 2568 { 2569 s2n(0,p);/* null authenticator length */ 2570 n+=2; 2571 } 2572 2573 tmp_buf[0]=s->client_version>>8; 2574 tmp_buf[1]=s->client_version&0xff; 2575 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0) 2576 goto err; 2577 2578 /* 20010420 VRS. Tried it this way; failed. 2579 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL); 2580 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx, 2581 ** kssl_ctx->length); 2582 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv); 2583 */ 2584 2585 memset(iv, 0, sizeof iv); /* per RFC 1510 */ 2586 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL, 2587 kssl_ctx->key,iv); 2588 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf, 2589 sizeof tmp_buf); 2590 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl); 2591 outl += padl; 2592 if (outl > (int)sizeof epms) 2593 { 2594 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); 2595 goto err; 2596 } 2597 EVP_CIPHER_CTX_cleanup(&ciph_ctx); 2598 2599 /* KerberosWrapper.EncryptedPreMasterSecret */ 2600 s2n(outl,p); 2601 memcpy(p, epms, outl); 2602 p+=outl; 2603 n+=outl + 2; 2604 2605 s->session->master_key_length= 2606 s->method->ssl3_enc->generate_master_secret(s, 2607 s->session->master_key, 2608 tmp_buf, sizeof tmp_buf); 2609 2610 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf); 2611 OPENSSL_cleanse(epms, outl); 2612 } 2613#endif 2614#ifndef OPENSSL_NO_DH 2615 else if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) 2616 { 2617 DH *dh_srvr,*dh_clnt; 2618 2619 if (s->session->sess_cert == NULL) 2620 { 2621 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 2622 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE); 2623 goto err; 2624 } 2625 2626 if (s->session->sess_cert->peer_dh_tmp != NULL) 2627 dh_srvr=s->session->sess_cert->peer_dh_tmp; 2628 else 2629 { 2630 /* we get them from the cert */ 2631 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); 2632 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS); 2633 goto err; 2634 } 2635 2636 /* generate a new random key */ 2637 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL) 2638 { 2639 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 2640 goto err; 2641 } 2642 if (!DH_generate_key(dh_clnt)) 2643 { 2644 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 2645 DH_free(dh_clnt); 2646 goto err; 2647 } 2648 2649 /* use the 'p' output buffer for the DH key, but 2650 * make sure to clear it out afterwards */ 2651 2652 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt); 2653 2654 if (n <= 0) 2655 { 2656 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 2657 DH_free(dh_clnt); 2658 goto err; 2659 } 2660 2661 /* generate master key from the result */ 2662 s->session->master_key_length= 2663 s->method->ssl3_enc->generate_master_secret(s, 2664 s->session->master_key,p,n); 2665 /* clean up */ 2666 memset(p,0,n); 2667 2668 /* send off the data */ 2669 n=BN_num_bytes(dh_clnt->pub_key); 2670 s2n(n,p); 2671 BN_bn2bin(dh_clnt->pub_key,p); 2672 n+=2; 2673 2674 DH_free(dh_clnt); 2675 2676 /* perhaps clean things up a bit EAY EAY EAY EAY*/ 2677 } 2678#endif 2679#ifndef OPENSSL_NO_ECDH 2680 else if (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)) 2681 { 2682 const EC_GROUP *srvr_group = NULL; 2683 EC_KEY *tkey; 2684 int ecdh_clnt_cert = 0; 2685 int field_size = 0; 2686#ifndef OPENSSL_NO_PSK 2687 unsigned char *pre_ms; 2688 unsigned char *t; 2689 unsigned int pre_ms_len; 2690 unsigned int i; 2691#endif 2692 2693 /* Did we send out the client's 2694 * ECDH share for use in premaster 2695 * computation as part of client certificate? 2696 * If so, set ecdh_clnt_cert to 1. 2697 */ 2698 if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL)) 2699 { 2700 /* XXX: For now, we do not support client 2701 * authentication using ECDH certificates. 2702 * To add such support, one needs to add 2703 * code that checks for appropriate 2704 * conditions and sets ecdh_clnt_cert to 1. 2705 * For example, the cert have an ECC 2706 * key on the same curve as the server's 2707 * and the key should be authorized for 2708 * key agreement. 2709 * 2710 * One also needs to add code in ssl3_connect 2711 * to skip sending the certificate verify 2712 * message. 2713 * 2714 * if ((s->cert->key->privatekey != NULL) && 2715 * (s->cert->key->privatekey->type == 2716 * EVP_PKEY_EC) && ...) 2717 * ecdh_clnt_cert = 1; 2718 */ 2719 } 2720 2721 if (s->session->sess_cert->peer_ecdh_tmp != NULL) 2722 { 2723 tkey = s->session->sess_cert->peer_ecdh_tmp; 2724 } 2725 else 2726 { 2727 /* Get the Server Public Key from Cert */ 2728 srvr_pub_pkey = X509_get_pubkey(s->session-> \ 2729 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509); 2730 if ((srvr_pub_pkey == NULL) || 2731 (srvr_pub_pkey->type != EVP_PKEY_EC) || 2732 (srvr_pub_pkey->pkey.ec == NULL)) 2733 { 2734 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2735 ERR_R_INTERNAL_ERROR); 2736 goto err; 2737 } 2738 2739 tkey = srvr_pub_pkey->pkey.ec; 2740 } 2741 2742 srvr_group = EC_KEY_get0_group(tkey); 2743 srvr_ecpoint = EC_KEY_get0_public_key(tkey); 2744 2745 if ((srvr_group == NULL) || (srvr_ecpoint == NULL)) 2746 { 2747 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2748 ERR_R_INTERNAL_ERROR); 2749 goto err; 2750 } 2751 2752 if ((clnt_ecdh=EC_KEY_new()) == NULL) 2753 { 2754 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2755 goto err; 2756 } 2757 2758 if (!EC_KEY_set_group(clnt_ecdh, srvr_group)) 2759 { 2760 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB); 2761 goto err; 2762 } 2763 if (ecdh_clnt_cert) 2764 { 2765 /* Reuse key info from our certificate 2766 * We only need our private key to perform 2767 * the ECDH computation. 2768 */ 2769 const BIGNUM *priv_key; 2770 tkey = s->cert->key->privatekey->pkey.ec; 2771 priv_key = EC_KEY_get0_private_key(tkey); 2772 if (priv_key == NULL) 2773 { 2774 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2775 goto err; 2776 } 2777 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key)) 2778 { 2779 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB); 2780 goto err; 2781 } 2782 } 2783 else 2784 { 2785 /* Generate a new ECDH key pair */ 2786 if (!(EC_KEY_generate_key(clnt_ecdh))) 2787 { 2788 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB); 2789 goto err; 2790 } 2791 } 2792 2793 /* use the 'p' output buffer for the ECDH key, but 2794 * make sure to clear it out afterwards 2795 */ 2796 2797 field_size = EC_GROUP_get_degree(srvr_group); 2798 if (field_size <= 0) 2799 { 2800 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2801 ERR_R_ECDH_LIB); 2802 goto err; 2803 } 2804 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL); 2805 if (n <= 0) 2806 { 2807 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2808 ERR_R_ECDH_LIB); 2809 goto err; 2810 } 2811 2812#ifndef OPENSSL_NO_PSK 2813 /* ECDHE PSK ciphersuites from RFC 5489 */ 2814 if ((alg_a & SSL_aPSK) && psk_len != 0) 2815 { 2816 pre_ms_len = 2+psk_len+2+n; 2817 pre_ms = OPENSSL_malloc(pre_ms_len); 2818 if (pre_ms == NULL) 2819 { 2820 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2821 ERR_R_MALLOC_FAILURE); 2822 goto err; 2823 } 2824 memset(pre_ms, 0, pre_ms_len); 2825 t = pre_ms; 2826 s2n(psk_len, t); 2827 memcpy(t, psk, psk_len); 2828 t += psk_len; 2829 s2n(n, t); 2830 memcpy(t, p, n); 2831 s->session->master_key_length = s->method->ssl3_enc \ 2832 -> generate_master_secret(s, 2833 s->session->master_key, pre_ms, pre_ms_len); 2834 OPENSSL_cleanse(pre_ms, pre_ms_len); 2835 OPENSSL_free(pre_ms); 2836 } 2837#endif /* OPENSSL_NO_PSK */ 2838 if (!(alg_a & SSL_aPSK)) 2839 { 2840 /* generate master key from the result */ 2841 s->session->master_key_length = s->method->ssl3_enc \ 2842 -> generate_master_secret(s, 2843 s->session->master_key, p, n); 2844 } 2845 memset(p, 0, n); /* clean up */ 2846 if (ecdh_clnt_cert) 2847 { 2848 /* Send empty client key exch message */ 2849 n = 0; 2850 } 2851 else 2852 { 2853 /* First check the size of encoding and 2854 * allocate memory accordingly. 2855 */ 2856 encoded_pt_len = 2857 EC_POINT_point2oct(srvr_group, 2858 EC_KEY_get0_public_key(clnt_ecdh), 2859 POINT_CONVERSION_UNCOMPRESSED, 2860 NULL, 0, NULL); 2861 2862 encodedPoint = (unsigned char *) 2863 OPENSSL_malloc(encoded_pt_len * 2864 sizeof(unsigned char)); 2865 bn_ctx = BN_CTX_new(); 2866 if ((encodedPoint == NULL) || 2867 (bn_ctx == NULL)) 2868 { 2869 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2870 goto err; 2871 } 2872 2873 /* Encode the public key */ 2874 encoded_pt_len = EC_POINT_point2oct(srvr_group, 2875 EC_KEY_get0_public_key(clnt_ecdh), 2876 POINT_CONVERSION_UNCOMPRESSED, 2877 encodedPoint, encoded_pt_len, bn_ctx); 2878 2879 n = 0; 2880#ifndef OPENSSL_NO_PSK 2881 if ((alg_a & SSL_aPSK) && psk_len != 0) 2882 { 2883 i = strlen(s->session->psk_identity); 2884 s2n(i, p); 2885 memcpy(p, s->session->psk_identity, i); 2886 p += i; 2887 n = i + 2; 2888 } 2889#endif 2890 2891 *p = encoded_pt_len; /* length of encoded point */ 2892 /* Encoded point will be copied here */ 2893 p += 1; 2894 n += 1; 2895 /* copy the point */ 2896 memcpy((unsigned char *)p, encodedPoint, encoded_pt_len); 2897 /* increment n to account for length field */ 2898 n += encoded_pt_len; 2899 } 2900 2901 /* Free allocated memory */ 2902 BN_CTX_free(bn_ctx); 2903 if (encodedPoint != NULL) OPENSSL_free(encodedPoint); 2904 if (clnt_ecdh != NULL) 2905 EC_KEY_free(clnt_ecdh); 2906 EVP_PKEY_free(srvr_pub_pkey); 2907 } 2908#endif /* !OPENSSL_NO_ECDH */ 2909 else if (alg_k & SSL_kGOST) 2910 { 2911 /* GOST key exchange message creation */ 2912 EVP_PKEY_CTX *pkey_ctx; 2913 X509 *peer_cert; 2914 size_t msglen; 2915 unsigned int md_len; 2916 int keytype; 2917 unsigned char premaster_secret[32],shared_ukm[32], tmp[256]; 2918 EVP_MD_CTX *ukm_hash; 2919 EVP_PKEY *pub_key; 2920 2921 /* Get server sertificate PKEY and create ctx from it */ 2922 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST01)].x509; 2923 if (!peer_cert) 2924 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST94)].x509; 2925 if (!peer_cert) { 2926 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER); 2927 goto err; 2928 } 2929 2930 pkey_ctx=EVP_PKEY_CTX_new(pub_key=X509_get_pubkey(peer_cert),NULL); 2931 /* If we have send a certificate, and certificate key 2932 2933 * parameters match those of server certificate, use 2934 * certificate key for key exchange 2935 */ 2936 2937 /* Otherwise, generate ephemeral key pair */ 2938 2939 EVP_PKEY_encrypt_init(pkey_ctx); 2940 /* Generate session key */ 2941 RAND_bytes(premaster_secret,32); 2942 /* If we have client certificate, use its secret as peer key */ 2943 if (s->s3->tmp.cert_req && s->cert->key->privatekey) { 2944 if (EVP_PKEY_derive_set_peer(pkey_ctx,s->cert->key->privatekey) <=0) { 2945 /* If there was an error - just ignore it. Ephemeral key 2946 * would be used 2947 */ 2948 ERR_clear_error(); 2949 } 2950 } 2951 /* Compute shared IV and store it in algorithm-specific 2952 * context data */ 2953 ukm_hash = EVP_MD_CTX_create(); 2954 EVP_DigestInit(ukm_hash,EVP_get_digestbynid(NID_id_GostR3411_94)); 2955 EVP_DigestUpdate(ukm_hash,s->s3->client_random,SSL3_RANDOM_SIZE); 2956 EVP_DigestUpdate(ukm_hash,s->s3->server_random,SSL3_RANDOM_SIZE); 2957 EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len); 2958 EVP_MD_CTX_destroy(ukm_hash); 2959 if (EVP_PKEY_CTX_ctrl(pkey_ctx,-1,EVP_PKEY_OP_ENCRYPT,EVP_PKEY_CTRL_SET_IV, 2960 8,shared_ukm)<0) { 2961 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2962 SSL_R_LIBRARY_BUG); 2963 goto err; 2964 } 2965 /* Make GOST keytransport blob message */ 2966 /*Encapsulate it into sequence */ 2967 *(p++)=V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED; 2968 msglen=255; 2969 if (EVP_PKEY_encrypt(pkey_ctx,tmp,&msglen,premaster_secret,32)<0) { 2970 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2971 SSL_R_LIBRARY_BUG); 2972 goto err; 2973 } 2974 if (msglen >= 0x80) 2975 { 2976 *(p++)=0x81; 2977 *(p++)= msglen & 0xff; 2978 n=msglen+3; 2979 } 2980 else 2981 { 2982 *(p++)= msglen & 0xff; 2983 n=msglen+2; 2984 } 2985 memcpy(p, tmp, msglen); 2986 /* Check if pubkey from client certificate was used */ 2987 if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0) 2988 { 2989 /* Set flag "skip certificate verify" */ 2990 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY; 2991 } 2992 EVP_PKEY_CTX_free(pkey_ctx); 2993 s->session->master_key_length= 2994 s->method->ssl3_enc->generate_master_secret(s, 2995 s->session->master_key,premaster_secret,32); 2996 EVP_PKEY_free(pub_key); 2997 2998 } 2999#ifndef OPENSSL_NO_SRP 3000 else if (alg_k & SSL_kSRP) 3001 { 3002 if (s->srp_ctx.A != NULL) 3003 { 3004 /* send off the data */ 3005 n=BN_num_bytes(s->srp_ctx.A); 3006 s2n(n,p); 3007 BN_bn2bin(s->srp_ctx.A,p); 3008 n+=2; 3009 } 3010 else 3011 { 3012 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 3013 goto err; 3014 } 3015 if (s->session->srp_username != NULL) 3016 OPENSSL_free(s->session->srp_username); 3017 s->session->srp_username = BUF_strdup(s->srp_ctx.login); 3018 if (s->session->srp_username == NULL) 3019 { 3020 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 3021 ERR_R_MALLOC_FAILURE); 3022 goto err; 3023 } 3024 3025 if ((s->session->master_key_length = SRP_generate_client_master_secret(s,s->session->master_key))<0) 3026 { 3027 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 3028 goto err; 3029 } 3030 } 3031#endif 3032 else if (!(alg_k & SSL_kPSK)) 3033 { 3034 ssl3_send_alert(s, SSL3_AL_FATAL, 3035 SSL_AD_HANDSHAKE_FAILURE); 3036 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 3037 ERR_R_INTERNAL_ERROR); 3038 goto err; 3039 } 3040 3041 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE; 3042 l2n3(n,d); 3043 3044 s->state=SSL3_ST_CW_KEY_EXCH_B; 3045 /* number of bytes to write */ 3046 s->init_num=n+4; 3047 s->init_off=0; 3048 } 3049 3050 /* SSL3_ST_CW_KEY_EXCH_B */ 3051 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 3052err: 3053#ifndef OPENSSL_NO_ECDH 3054 BN_CTX_free(bn_ctx); 3055 if (encodedPoint != NULL) OPENSSL_free(encodedPoint); 3056 if (clnt_ecdh != NULL) 3057 EC_KEY_free(clnt_ecdh); 3058 EVP_PKEY_free(srvr_pub_pkey); 3059#endif 3060 return(-1); 3061 } 3062 3063int ssl3_send_client_verify(SSL *s) 3064 { 3065 unsigned char *p,*d; 3066 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH]; 3067 EVP_PKEY *pkey; 3068 EVP_PKEY_CTX *pctx=NULL; 3069 EVP_MD_CTX mctx; 3070 unsigned u=0; 3071 unsigned long n; 3072 int j; 3073 3074 EVP_MD_CTX_init(&mctx); 3075 3076 if (s->state == SSL3_ST_CW_CERT_VRFY_A) 3077 { 3078 d=(unsigned char *)s->init_buf->data; 3079 p= &(d[4]); 3080 pkey=s->cert->key->privatekey; 3081/* Create context from key and test if sha1 is allowed as digest */ 3082 pctx = EVP_PKEY_CTX_new(pkey,NULL); 3083 EVP_PKEY_sign_init(pctx); 3084 if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1())>0) 3085 { 3086 if (TLS1_get_version(s) < TLS1_2_VERSION) 3087 s->method->ssl3_enc->cert_verify_mac(s, 3088 NID_sha1, 3089 &(data[MD5_DIGEST_LENGTH])); 3090 } 3091 else 3092 { 3093 ERR_clear_error(); 3094 } 3095 /* For TLS v1.2 send signature algorithm and signature 3096 * using agreed digest and cached handshake records. 3097 */ 3098 if (TLS1_get_version(s) >= TLS1_2_VERSION) 3099 { 3100 long hdatalen = 0; 3101 void *hdata; 3102 const EVP_MD *md; 3103 switch (ssl_cert_type(NULL, pkey)) 3104 { 3105 case SSL_PKEY_RSA_ENC: 3106 md = s->s3->digest_rsa; 3107 break; 3108 case SSL_PKEY_DSA_SIGN: 3109 md = s->s3->digest_dsa; 3110 break; 3111 case SSL_PKEY_ECC: 3112 md = s->s3->digest_ecdsa; 3113 break; 3114 default: 3115 md = NULL; 3116 } 3117 if (!md) 3118 /* Unlike with the SignatureAlgorithm extension (sent by clients), 3119 * there are no default algorithms for the CertificateRequest message 3120 * (sent by servers). However, now that we've sent a certificate 3121 * for which we don't really know what hash to use for signing, the 3122 * best we can do is try a default algorithm. */ 3123 md = EVP_sha1(); 3124 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, 3125 &hdata); 3126 if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md)) 3127 { 3128 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, 3129 ERR_R_INTERNAL_ERROR); 3130 goto err; 3131 } 3132 p += 2; 3133#ifdef SSL_DEBUG 3134 fprintf(stderr, "Using TLS 1.2 with client alg %s\n", 3135 EVP_MD_name(md)); 3136#endif 3137 if (!EVP_SignInit_ex(&mctx, md, NULL) 3138 || !EVP_SignUpdate(&mctx, hdata, hdatalen) 3139 || !EVP_SignFinal(&mctx, p + 2, &u, pkey)) 3140 { 3141 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, 3142 ERR_R_EVP_LIB); 3143 goto err; 3144 } 3145 s2n(u,p); 3146 n = u + 4; 3147 if (!ssl3_digest_cached_records(s)) 3148 goto err; 3149 } 3150 else 3151#ifndef OPENSSL_NO_RSA 3152 if (pkey->type == EVP_PKEY_RSA) 3153 { 3154 s->method->ssl3_enc->cert_verify_mac(s, 3155 NID_md5, 3156 &(data[0])); 3157 if (RSA_sign(NID_md5_sha1, data, 3158 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH, 3159 &(p[2]), &u, pkey->pkey.rsa) <= 0 ) 3160 { 3161 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB); 3162 goto err; 3163 } 3164 s2n(u,p); 3165 n=u+2; 3166 } 3167 else 3168#endif 3169#ifndef OPENSSL_NO_DSA 3170 if (pkey->type == EVP_PKEY_DSA) 3171 { 3172 if (!DSA_sign(pkey->save_type, 3173 &(data[MD5_DIGEST_LENGTH]), 3174 SHA_DIGEST_LENGTH,&(p[2]), 3175 (unsigned int *)&j,pkey->pkey.dsa)) 3176 { 3177 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB); 3178 goto err; 3179 } 3180 s2n(j,p); 3181 n=j+2; 3182 } 3183 else 3184#endif 3185#ifndef OPENSSL_NO_ECDSA 3186 if (pkey->type == EVP_PKEY_EC) 3187 { 3188 if (!ECDSA_sign(pkey->save_type, 3189 &(data[MD5_DIGEST_LENGTH]), 3190 SHA_DIGEST_LENGTH,&(p[2]), 3191 (unsigned int *)&j,pkey->pkey.ec)) 3192 { 3193 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, 3194 ERR_R_ECDSA_LIB); 3195 goto err; 3196 } 3197 s2n(j,p); 3198 n=j+2; 3199 } 3200 else 3201#endif 3202 if (pkey->type == NID_id_GostR3410_94 || pkey->type == NID_id_GostR3410_2001) 3203 { 3204 unsigned char signbuf[64]; 3205 int i; 3206 size_t sigsize=64; 3207 s->method->ssl3_enc->cert_verify_mac(s, 3208 NID_id_GostR3411_94, 3209 data); 3210 if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) { 3211 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, 3212 ERR_R_INTERNAL_ERROR); 3213 goto err; 3214 } 3215 for (i=63,j=0; i>=0; j++, i--) { 3216 p[2+j]=signbuf[i]; 3217 } 3218 s2n(j,p); 3219 n=j+2; 3220 } 3221 else 3222 { 3223 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR); 3224 goto err; 3225 } 3226 *(d++)=SSL3_MT_CERTIFICATE_VERIFY; 3227 l2n3(n,d); 3228 3229 s->state=SSL3_ST_CW_CERT_VRFY_B; 3230 s->init_num=(int)n+4; 3231 s->init_off=0; 3232 } 3233 EVP_MD_CTX_cleanup(&mctx); 3234 EVP_PKEY_CTX_free(pctx); 3235 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 3236err: 3237 EVP_MD_CTX_cleanup(&mctx); 3238 EVP_PKEY_CTX_free(pctx); 3239 return(-1); 3240 } 3241 3242int ssl3_send_client_certificate(SSL *s) 3243 { 3244 X509 *x509=NULL; 3245 EVP_PKEY *pkey=NULL; 3246 int i; 3247 unsigned long l; 3248 3249 if (s->state == SSL3_ST_CW_CERT_A) 3250 { 3251 if ((s->cert == NULL) || 3252 (s->cert->key->x509 == NULL) || 3253 (s->cert->key->privatekey == NULL)) 3254 s->state=SSL3_ST_CW_CERT_B; 3255 else 3256 s->state=SSL3_ST_CW_CERT_C; 3257 } 3258 3259 /* We need to get a client cert */ 3260 if (s->state == SSL3_ST_CW_CERT_B) 3261 { 3262 /* If we get an error, we need to 3263 * ssl->rwstate=SSL_X509_LOOKUP; return(-1); 3264 * We then get retied later */ 3265 i=0; 3266 i = ssl_do_client_cert_cb(s, &x509, &pkey); 3267 if (i < 0) 3268 { 3269 s->rwstate=SSL_X509_LOOKUP; 3270 return(-1); 3271 } 3272 s->rwstate=SSL_NOTHING; 3273 if ((i == 1) && (pkey != NULL) && (x509 != NULL)) 3274 { 3275 s->state=SSL3_ST_CW_CERT_B; 3276 if ( !SSL_use_certificate(s,x509) || 3277 !SSL_use_PrivateKey(s,pkey)) 3278 i=0; 3279 } 3280 else if (i == 1) 3281 { 3282 i=0; 3283 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); 3284 } 3285 3286 if (x509 != NULL) X509_free(x509); 3287 if (pkey != NULL) EVP_PKEY_free(pkey); 3288 if (i == 0) 3289 { 3290 if (s->version == SSL3_VERSION) 3291 { 3292 s->s3->tmp.cert_req=0; 3293 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE); 3294 return(1); 3295 } 3296 else 3297 { 3298 s->s3->tmp.cert_req=2; 3299 } 3300 } 3301 3302 /* Ok, we have a cert */ 3303 s->state=SSL3_ST_CW_CERT_C; 3304 } 3305 3306 if (s->state == SSL3_ST_CW_CERT_C) 3307 { 3308 s->state=SSL3_ST_CW_CERT_D; 3309 l=ssl3_output_cert_chain(s, 3310 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509); 3311 s->init_num=(int)l; 3312 s->init_off=0; 3313 } 3314 /* SSL3_ST_CW_CERT_D */ 3315 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 3316 } 3317 3318#define has_bits(i,m) (((i)&(m)) == (m)) 3319 3320int ssl3_check_cert_and_algorithm(SSL *s) 3321 { 3322 int i,idx; 3323 long alg_k,alg_a; 3324 EVP_PKEY *pkey=NULL; 3325 SESS_CERT *sc; 3326#ifndef OPENSSL_NO_RSA 3327 RSA *rsa; 3328#endif 3329#ifndef OPENSSL_NO_DH 3330 DH *dh; 3331#endif 3332 3333 alg_k=s->s3->tmp.new_cipher->algorithm_mkey; 3334 alg_a=s->s3->tmp.new_cipher->algorithm_auth; 3335 3336 /* we don't have a certificate */ 3337 if ((alg_a & (SSL_aDH|SSL_aNULL|SSL_aKRB5)) || ((alg_a & SSL_aPSK) && !(alg_k & SSL_kRSA))) 3338 return(1); 3339 3340 sc=s->session->sess_cert; 3341 if (sc == NULL) 3342 { 3343 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR); 3344 goto err; 3345 } 3346 3347#ifndef OPENSSL_NO_RSA 3348 rsa=s->session->sess_cert->peer_rsa_tmp; 3349#endif 3350#ifndef OPENSSL_NO_DH 3351 dh=s->session->sess_cert->peer_dh_tmp; 3352#endif 3353 3354 /* This is the passed certificate */ 3355 3356 idx=sc->peer_cert_type; 3357#ifndef OPENSSL_NO_ECDH 3358 if (idx == SSL_PKEY_ECC) 3359 { 3360 if (ssl_check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509, 3361 s) == 0) 3362 { /* check failed */ 3363 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT); 3364 goto f_err; 3365 } 3366 else 3367 { 3368 return 1; 3369 } 3370 } 3371#endif 3372 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509); 3373 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey); 3374 EVP_PKEY_free(pkey); 3375 3376 3377 /* Check that we have a certificate if we require one */ 3378 if ((alg_a & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN)) 3379 { 3380 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT); 3381 goto f_err; 3382 } 3383#ifndef OPENSSL_NO_DSA 3384 else if ((alg_a & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN)) 3385 { 3386 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT); 3387 goto f_err; 3388 } 3389#endif 3390#ifndef OPENSSL_NO_RSA 3391 if ((alg_k & SSL_kRSA) && 3392 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL))) 3393 { 3394 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT); 3395 goto f_err; 3396 } 3397#endif 3398#ifndef OPENSSL_NO_DH 3399 if ((alg_k & SSL_kEDH) && 3400 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL))) 3401 { 3402 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY); 3403 goto f_err; 3404 } 3405 else if ((alg_k & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA)) 3406 { 3407 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT); 3408 goto f_err; 3409 } 3410#ifndef OPENSSL_NO_DSA 3411 else if ((alg_k & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA)) 3412 { 3413 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT); 3414 goto f_err; 3415 } 3416#endif 3417#endif 3418 3419 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP)) 3420 { 3421#ifndef OPENSSL_NO_RSA 3422 if (alg_k & SSL_kRSA) 3423 { 3424 if (rsa == NULL 3425 || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) 3426 { 3427 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY); 3428 goto f_err; 3429 } 3430 } 3431 else 3432#endif 3433#ifndef OPENSSL_NO_DH 3434 if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) 3435 { 3436 if (dh == NULL 3437 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) 3438 { 3439 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY); 3440 goto f_err; 3441 } 3442 } 3443 else 3444#endif 3445 { 3446 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE); 3447 goto f_err; 3448 } 3449 } 3450 return(1); 3451f_err: 3452 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); 3453err: 3454 return(0); 3455 } 3456 3457#if !defined(OPENSSL_NO_TLSEXT) 3458# if !defined(OPENSSL_NO_NEXTPROTONEG) 3459int ssl3_send_next_proto(SSL *s) 3460 { 3461 unsigned int len, padding_len; 3462 unsigned char *d; 3463 3464 if (s->state == SSL3_ST_CW_NEXT_PROTO_A) 3465 { 3466 len = s->next_proto_negotiated_len; 3467 padding_len = 32 - ((len + 2) % 32); 3468 d = (unsigned char *)s->init_buf->data; 3469 d[4] = len; 3470 memcpy(d + 5, s->next_proto_negotiated, len); 3471 d[5 + len] = padding_len; 3472 memset(d + 6 + len, 0, padding_len); 3473 *(d++)=SSL3_MT_NEXT_PROTO; 3474 l2n3(2 + len + padding_len, d); 3475 s->state = SSL3_ST_CW_NEXT_PROTO_B; 3476 s->init_num = 4 + 2 + len + padding_len; 3477 s->init_off = 0; 3478 } 3479 3480 return ssl3_do_write(s, SSL3_RT_HANDSHAKE); 3481} 3482# endif /* !OPENSSL_NO_NEXTPROTONEG */ 3483 3484int ssl3_send_channel_id(SSL *s) 3485 { 3486 unsigned char *d; 3487 int ret = -1, public_key_len; 3488 EVP_MD_CTX md_ctx; 3489 size_t sig_len; 3490 ECDSA_SIG *sig = NULL; 3491 unsigned char *public_key = NULL, *derp, *der_sig = NULL; 3492 3493 if (s->state != SSL3_ST_CW_CHANNEL_ID_A) 3494 return ssl3_do_write(s, SSL3_RT_HANDSHAKE); 3495 3496 d = (unsigned char *)s->init_buf->data; 3497 *(d++)=SSL3_MT_ENCRYPTED_EXTENSIONS; 3498 l2n3(2 + 2 + TLSEXT_CHANNEL_ID_SIZE, d); 3499 s2n(TLSEXT_TYPE_channel_id, d); 3500 s2n(TLSEXT_CHANNEL_ID_SIZE, d); 3501 3502 EVP_MD_CTX_init(&md_ctx); 3503 3504 public_key_len = i2d_PublicKey(s->tlsext_channel_id_private, NULL); 3505 if (public_key_len <= 0) 3506 { 3507 SSLerr(SSL_F_SSL3_SEND_CHANNEL_ID,SSL_R_CANNOT_SERIALIZE_PUBLIC_KEY); 3508 goto err; 3509 } 3510 // i2d_PublicKey will produce an ANSI X9.62 public key which, for a 3511 // P-256 key, is 0x04 (meaning uncompressed) followed by the x and y 3512 // field elements as 32-byte, big-endian numbers. 3513 if (public_key_len != 65) 3514 { 3515 SSLerr(SSL_F_SSL3_SEND_CHANNEL_ID,SSL_R_CHANNEL_ID_NOT_P256); 3516 goto err; 3517 } 3518 public_key = OPENSSL_malloc(public_key_len); 3519 if (!public_key) 3520 { 3521 SSLerr(SSL_F_SSL3_SEND_CHANNEL_ID,ERR_R_MALLOC_FAILURE); 3522 goto err; 3523 } 3524 3525 derp = public_key; 3526 i2d_PublicKey(s->tlsext_channel_id_private, &derp); 3527 3528 if (EVP_DigestSignInit(&md_ctx, NULL, EVP_sha256(), NULL, 3529 s->tlsext_channel_id_private) != 1) 3530 { 3531 SSLerr(SSL_F_SSL3_SEND_CHANNEL_ID,SSL_R_EVP_DIGESTSIGNINIT_FAILED); 3532 goto err; 3533 } 3534 3535 if (!tls1_channel_id_hash(&md_ctx, s)) 3536 goto err; 3537 3538 if (!EVP_DigestSignFinal(&md_ctx, NULL, &sig_len)) 3539 { 3540 SSLerr(SSL_F_SSL3_SEND_CHANNEL_ID,SSL_R_EVP_DIGESTSIGNFINAL_FAILED); 3541 goto err; 3542 } 3543 3544 der_sig = OPENSSL_malloc(sig_len); 3545 if (!der_sig) 3546 { 3547 SSLerr(SSL_F_SSL3_SEND_CHANNEL_ID,ERR_R_MALLOC_FAILURE); 3548 goto err; 3549 } 3550 3551 if (!EVP_DigestSignFinal(&md_ctx, der_sig, &sig_len)) 3552 { 3553 SSLerr(SSL_F_SSL3_SEND_CHANNEL_ID,SSL_R_EVP_DIGESTSIGNFINAL_FAILED); 3554 goto err; 3555 } 3556 3557 derp = der_sig; 3558 sig = d2i_ECDSA_SIG(NULL, (const unsigned char**)&derp, sig_len); 3559 if (sig == NULL) 3560 { 3561 SSLerr(SSL_F_SSL3_SEND_CHANNEL_ID,SSL_R_D2I_ECDSA_SIG); 3562 goto err; 3563 } 3564 3565 // The first byte of public_key will be 0x4, denoting an uncompressed key. 3566 memcpy(d, public_key + 1, 64); 3567 d += 64; 3568 memset(d, 0, 2 * 32); 3569 BN_bn2bin(sig->r, d + 32 - BN_num_bytes(sig->r)); 3570 d += 32; 3571 BN_bn2bin(sig->s, d + 32 - BN_num_bytes(sig->s)); 3572 d += 32; 3573 3574 s->state = SSL3_ST_CW_CHANNEL_ID_B; 3575 s->init_num = 4 + 2 + 2 + TLSEXT_CHANNEL_ID_SIZE; 3576 s->init_off = 0; 3577 3578 ret = ssl3_do_write(s, SSL3_RT_HANDSHAKE); 3579 3580err: 3581 EVP_MD_CTX_cleanup(&md_ctx); 3582 if (public_key) 3583 OPENSSL_free(public_key); 3584 if (der_sig) 3585 OPENSSL_free(der_sig); 3586 if (sig) 3587 ECDSA_SIG_free(sig); 3588 3589 return ret; 3590 } 3591#endif /* !OPENSSL_NO_TLSEXT */ 3592 3593/* Check to see if handshake is full or resumed. Usually this is just a 3594 * case of checking to see if a cache hit has occurred. In the case of 3595 * session tickets we have to check the next message to be sure. 3596 */ 3597 3598#ifndef OPENSSL_NO_TLSEXT 3599int ssl3_check_finished(SSL *s) 3600 { 3601 int ok; 3602 long n; 3603 /* If we have no ticket it cannot be a resumed session. */ 3604 if (!s->session->tlsext_tick) 3605 return 1; 3606 /* this function is called when we really expect a Certificate 3607 * message, so permit appropriate message length */ 3608 n=s->method->ssl_get_message(s, 3609 SSL3_ST_CR_CERT_A, 3610 SSL3_ST_CR_CERT_B, 3611 -1, 3612 s->max_cert_list, 3613 &ok); 3614 if (!ok) return((int)n); 3615 s->s3->tmp.reuse_message = 1; 3616 if ((s->s3->tmp.message_type == SSL3_MT_FINISHED) 3617 || (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET)) 3618 return 2; 3619 3620 return 1; 3621 } 3622#endif 3623 3624int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey) 3625 { 3626 int i = 0; 3627#ifndef OPENSSL_NO_ENGINE 3628 if (s->ctx->client_cert_engine) 3629 { 3630 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s, 3631 SSL_get_client_CA_list(s), 3632 px509, ppkey, NULL, NULL, NULL); 3633 if (i != 0) 3634 return i; 3635 } 3636#endif 3637 if (s->ctx->client_cert_cb) 3638 i = s->ctx->client_cert_cb(s,px509,ppkey); 3639 return i; 3640 } 3641