s3_clnt.c revision 296465
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) 1998-2003 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#include <stdio.h> 126#include "ssl_locl.h" 127#include "kssl_lcl.h" 128#include <openssl/buffer.h> 129#include <openssl/rand.h> 130#include <openssl/objects.h> 131#include <openssl/evp.h> 132#include <openssl/md5.h> 133#ifdef OPENSSL_FIPS 134# include <openssl/fips.h> 135#endif 136 137#ifndef OPENSSL_NO_DH 138# include <openssl/dh.h> 139#endif 140#include <openssl/bn.h> 141#ifndef OPENSSL_NO_ENGINE 142# include <openssl/engine.h> 143#endif 144 145static SSL_METHOD *ssl3_get_client_method(int ver); 146static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b); 147 148#ifndef OPENSSL_NO_ECDH 149static int curve_id2nid(int curve_id); 150int check_srvr_ecc_cert_and_alg(X509 *x, SSL_CIPHER *cs); 151#endif 152 153static SSL_METHOD *ssl3_get_client_method(int ver) 154{ 155 if (ver == SSL3_VERSION) 156 return (SSLv3_client_method()); 157 else 158 return (NULL); 159} 160 161IMPLEMENT_ssl3_meth_func(SSLv3_client_method, 162 ssl_undefined_function, 163 ssl3_connect, ssl3_get_client_method) 164 165int ssl3_connect(SSL *s) 166{ 167 BUF_MEM *buf = NULL; 168 unsigned long Time = (unsigned long)time(NULL); 169 void (*cb) (const SSL *ssl, int type, int val) = NULL; 170 int ret = -1; 171 int new_state, state, skip = 0; 172 173 RAND_add(&Time, sizeof(Time), 0); 174 ERR_clear_error(); 175 clear_sys_error(); 176 177 if (s->info_callback != NULL) 178 cb = s->info_callback; 179 else if (s->ctx->info_callback != NULL) 180 cb = s->ctx->info_callback; 181 182 s->in_handshake++; 183 if (!SSL_in_init(s) || SSL_in_before(s)) 184 SSL_clear(s); 185 186 for (;;) { 187 state = s->state; 188 189 switch (s->state) { 190 case SSL_ST_RENEGOTIATE: 191 s->new_session = 1; 192 s->state = SSL_ST_CONNECT; 193 s->ctx->stats.sess_connect_renegotiate++; 194 /* break */ 195 case SSL_ST_BEFORE: 196 case SSL_ST_CONNECT: 197 case SSL_ST_BEFORE | SSL_ST_CONNECT: 198 case SSL_ST_OK | SSL_ST_CONNECT: 199 200 s->server = 0; 201 if (cb != NULL) 202 cb(s, SSL_CB_HANDSHAKE_START, 1); 203 204 if ((s->version & 0xff00) != 0x0300) { 205 SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR); 206 ret = -1; 207 goto end; 208 } 209 210 /* s->version=SSL3_VERSION; */ 211 s->type = SSL_ST_CONNECT; 212 213 if (s->init_buf == NULL) { 214 if ((buf = BUF_MEM_new()) == NULL) { 215 ret = -1; 216 goto end; 217 } 218 if (!BUF_MEM_grow(buf, SSL3_RT_MAX_PLAIN_LENGTH)) { 219 ret = -1; 220 goto end; 221 } 222 s->init_buf = buf; 223 buf = NULL; 224 } 225 226 if (!ssl3_setup_buffers(s)) { 227 ret = -1; 228 goto end; 229 } 230 231 /* setup buffing BIO */ 232 if (!ssl_init_wbio_buffer(s, 0)) { 233 ret = -1; 234 goto end; 235 } 236 237 /* don't push the buffering BIO quite yet */ 238 239 ssl3_init_finished_mac(s); 240 241 s->state = SSL3_ST_CW_CLNT_HELLO_A; 242 s->ctx->stats.sess_connect++; 243 s->init_num = 0; 244 break; 245 246 case SSL3_ST_CW_CLNT_HELLO_A: 247 case SSL3_ST_CW_CLNT_HELLO_B: 248 249 s->shutdown = 0; 250 ret = ssl3_client_hello(s); 251 if (ret <= 0) 252 goto end; 253 s->state = SSL3_ST_CR_SRVR_HELLO_A; 254 s->init_num = 0; 255 256 /* turn on buffering for the next lot of output */ 257 if (s->bbio != s->wbio) 258 s->wbio = BIO_push(s->bbio, s->wbio); 259 260 break; 261 262 case SSL3_ST_CR_SRVR_HELLO_A: 263 case SSL3_ST_CR_SRVR_HELLO_B: 264 ret = ssl3_get_server_hello(s); 265 if (ret <= 0) 266 goto end; 267 if (s->hit) { 268 s->state = SSL3_ST_CR_FINISHED_A; 269#ifndef OPENSSL_NO_TLSEXT 270 if (s->tlsext_ticket_expected) { 271 /* receive renewed session ticket */ 272 s->state = SSL3_ST_CR_SESSION_TICKET_A; 273 } 274#endif 275 } else 276 s->state = SSL3_ST_CR_CERT_A; 277 s->init_num = 0; 278 break; 279 280 case SSL3_ST_CR_CERT_A: 281 case SSL3_ST_CR_CERT_B: 282#ifndef OPENSSL_NO_TLSEXT 283 ret = ssl3_check_finished(s); 284 if (ret <= 0) 285 goto end; 286 if (ret == 2) { 287 s->hit = 1; 288 if (s->tlsext_ticket_expected) 289 s->state = SSL3_ST_CR_SESSION_TICKET_A; 290 else 291 s->state = SSL3_ST_CR_FINISHED_A; 292 s->init_num = 0; 293 break; 294 } 295#endif 296 /* Check if it is anon DH/ECDH */ 297 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL)) { 298 ret = ssl3_get_server_certificate(s); 299 if (ret <= 0) 300 goto end; 301#ifndef OPENSSL_NO_TLSEXT 302 if (s->tlsext_status_expected) 303 s->state = SSL3_ST_CR_CERT_STATUS_A; 304 else 305 s->state = SSL3_ST_CR_KEY_EXCH_A; 306 } else { 307 skip = 1; 308 s->state = SSL3_ST_CR_KEY_EXCH_A; 309 } 310#else 311 } else 312 skip = 1; 313 314 s->state = SSL3_ST_CR_KEY_EXCH_A; 315#endif 316 s->init_num = 0; 317 break; 318 319 case SSL3_ST_CR_KEY_EXCH_A: 320 case SSL3_ST_CR_KEY_EXCH_B: 321 ret = ssl3_get_key_exchange(s); 322 if (ret <= 0) 323 goto end; 324 s->state = SSL3_ST_CR_CERT_REQ_A; 325 s->init_num = 0; 326 327 /* 328 * at this point we check that we have the required stuff from 329 * the server 330 */ 331 if (!ssl3_check_cert_and_algorithm(s)) { 332 ret = -1; 333 goto end; 334 } 335 break; 336 337 case SSL3_ST_CR_CERT_REQ_A: 338 case SSL3_ST_CR_CERT_REQ_B: 339 ret = ssl3_get_certificate_request(s); 340 if (ret <= 0) 341 goto end; 342 s->state = SSL3_ST_CR_SRVR_DONE_A; 343 s->init_num = 0; 344 break; 345 346 case SSL3_ST_CR_SRVR_DONE_A: 347 case SSL3_ST_CR_SRVR_DONE_B: 348 ret = ssl3_get_server_done(s); 349 if (ret <= 0) 350 goto end; 351 if (s->s3->tmp.cert_req) 352 s->state = SSL3_ST_CW_CERT_A; 353 else 354 s->state = SSL3_ST_CW_KEY_EXCH_A; 355 s->init_num = 0; 356 357 break; 358 359 case SSL3_ST_CW_CERT_A: 360 case SSL3_ST_CW_CERT_B: 361 case SSL3_ST_CW_CERT_C: 362 case SSL3_ST_CW_CERT_D: 363 ret = ssl3_send_client_certificate(s); 364 if (ret <= 0) 365 goto end; 366 s->state = SSL3_ST_CW_KEY_EXCH_A; 367 s->init_num = 0; 368 break; 369 370 case SSL3_ST_CW_KEY_EXCH_A: 371 case SSL3_ST_CW_KEY_EXCH_B: 372 ret = ssl3_send_client_key_exchange(s); 373 if (ret <= 0) 374 goto end; 375 /* 376 * EAY EAY EAY need to check for DH fix cert sent back 377 */ 378 /* 379 * For TLS, cert_req is set to 2, so a cert chain of nothing is 380 * sent, but no verify packet is sent 381 */ 382 /* 383 * XXX: For now, we do not support client authentication in ECDH 384 * cipher suites with ECDH (rather than ECDSA) certificates. We 385 * need to skip the certificate verify message when client's 386 * ECDH public key is sent inside the client certificate. 387 */ 388 if (s->s3->tmp.cert_req == 1) { 389 s->state = SSL3_ST_CW_CERT_VRFY_A; 390 } else { 391 s->state = SSL3_ST_CW_CHANGE_A; 392 s->s3->change_cipher_spec = 0; 393 } 394 395 s->init_num = 0; 396 break; 397 398 case SSL3_ST_CW_CERT_VRFY_A: 399 case SSL3_ST_CW_CERT_VRFY_B: 400 ret = ssl3_send_client_verify(s); 401 if (ret <= 0) 402 goto end; 403 s->state = SSL3_ST_CW_CHANGE_A; 404 s->init_num = 0; 405 s->s3->change_cipher_spec = 0; 406 break; 407 408 case SSL3_ST_CW_CHANGE_A: 409 case SSL3_ST_CW_CHANGE_B: 410 ret = ssl3_send_change_cipher_spec(s, 411 SSL3_ST_CW_CHANGE_A, 412 SSL3_ST_CW_CHANGE_B); 413 if (ret <= 0) 414 goto end; 415 s->state = SSL3_ST_CW_FINISHED_A; 416 s->init_num = 0; 417 418 s->session->cipher = s->s3->tmp.new_cipher; 419#ifdef OPENSSL_NO_COMP 420 s->session->compress_meth = 0; 421#else 422 if (s->s3->tmp.new_compression == NULL) 423 s->session->compress_meth = 0; 424 else 425 s->session->compress_meth = s->s3->tmp.new_compression->id; 426#endif 427 if (!s->method->ssl3_enc->setup_key_block(s)) { 428 ret = -1; 429 goto end; 430 } 431 432 if (!s->method->ssl3_enc->change_cipher_state(s, 433 SSL3_CHANGE_CIPHER_CLIENT_WRITE)) 434 { 435 ret = -1; 436 goto end; 437 } 438 439 break; 440 441 case SSL3_ST_CW_FINISHED_A: 442 case SSL3_ST_CW_FINISHED_B: 443 ret = ssl3_send_finished(s, 444 SSL3_ST_CW_FINISHED_A, 445 SSL3_ST_CW_FINISHED_B, 446 s->method-> 447 ssl3_enc->client_finished_label, 448 s->method-> 449 ssl3_enc->client_finished_label_len); 450 if (ret <= 0) 451 goto end; 452 s->s3->flags |= SSL3_FLAGS_CCS_OK; 453 s->state = SSL3_ST_CW_FLUSH; 454 455 /* clear flags */ 456 s->s3->flags &= ~SSL3_FLAGS_POP_BUFFER; 457 if (s->hit) { 458 s->s3->tmp.next_state = SSL_ST_OK; 459 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED) { 460 s->state = SSL_ST_OK; 461 s->s3->flags |= SSL3_FLAGS_POP_BUFFER; 462 s->s3->delay_buf_pop_ret = 0; 463 } 464 } else { 465#ifndef OPENSSL_NO_TLSEXT 466 /* 467 * Allow NewSessionTicket if ticket expected 468 */ 469 if (s->tlsext_ticket_expected) 470 s->s3->tmp.next_state = SSL3_ST_CR_SESSION_TICKET_A; 471 else 472#endif 473 474 s->s3->tmp.next_state = SSL3_ST_CR_FINISHED_A; 475 } 476 s->init_num = 0; 477 break; 478 479#ifndef OPENSSL_NO_TLSEXT 480 case SSL3_ST_CR_SESSION_TICKET_A: 481 case SSL3_ST_CR_SESSION_TICKET_B: 482 ret = ssl3_get_new_session_ticket(s); 483 if (ret <= 0) 484 goto end; 485 s->state = SSL3_ST_CR_FINISHED_A; 486 s->init_num = 0; 487 break; 488 489 case SSL3_ST_CR_CERT_STATUS_A: 490 case SSL3_ST_CR_CERT_STATUS_B: 491 ret = ssl3_get_cert_status(s); 492 if (ret <= 0) 493 goto end; 494 s->state = SSL3_ST_CR_KEY_EXCH_A; 495 s->init_num = 0; 496 break; 497#endif 498 499 case SSL3_ST_CR_FINISHED_A: 500 case SSL3_ST_CR_FINISHED_B: 501 502 s->s3->flags |= SSL3_FLAGS_CCS_OK; 503 ret = ssl3_get_finished(s, SSL3_ST_CR_FINISHED_A, 504 SSL3_ST_CR_FINISHED_B); 505 if (ret <= 0) 506 goto end; 507 508 if (s->hit) 509 s->state = SSL3_ST_CW_CHANGE_A; 510 else 511 s->state = SSL_ST_OK; 512 s->init_num = 0; 513 break; 514 515 case SSL3_ST_CW_FLUSH: 516 s->rwstate = SSL_WRITING; 517 if (BIO_flush(s->wbio) <= 0) { 518 ret = -1; 519 goto end; 520 } 521 s->rwstate = SSL_NOTHING; 522 s->state = s->s3->tmp.next_state; 523 break; 524 525 case SSL_ST_OK: 526 /* clean a few things up */ 527 ssl3_cleanup_key_block(s); 528 529 if (s->init_buf != NULL) { 530 BUF_MEM_free(s->init_buf); 531 s->init_buf = NULL; 532 } 533 534 /* 535 * If we are not 'joining' the last two packets, remove the 536 * buffering now 537 */ 538 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER)) 539 ssl_free_wbio_buffer(s); 540 /* else do it later in ssl3_write */ 541 542 s->init_num = 0; 543 s->new_session = 0; 544 545 ssl_update_cache(s, SSL_SESS_CACHE_CLIENT); 546 if (s->hit) 547 s->ctx->stats.sess_hit++; 548 549 ret = 1; 550 /* s->server=0; */ 551 s->handshake_func = ssl3_connect; 552 s->ctx->stats.sess_connect_good++; 553 554 if (cb != NULL) 555 cb(s, SSL_CB_HANDSHAKE_DONE, 1); 556 557 goto end; 558 /* break; */ 559 560 default: 561 SSLerr(SSL_F_SSL3_CONNECT, SSL_R_UNKNOWN_STATE); 562 ret = -1; 563 goto end; 564 /* break; */ 565 } 566 567 /* did we do anything */ 568 if (!s->s3->tmp.reuse_message && !skip) { 569 if (s->debug) { 570 if ((ret = BIO_flush(s->wbio)) <= 0) 571 goto end; 572 } 573 574 if ((cb != NULL) && (s->state != state)) { 575 new_state = s->state; 576 s->state = state; 577 cb(s, SSL_CB_CONNECT_LOOP, 1); 578 s->state = new_state; 579 } 580 } 581 skip = 0; 582 } 583 end: 584 s->in_handshake--; 585 if (buf != NULL) 586 BUF_MEM_free(buf); 587 if (cb != NULL) 588 cb(s, SSL_CB_CONNECT_EXIT, ret); 589 return (ret); 590} 591 592int ssl3_client_hello(SSL *s) 593{ 594 unsigned char *buf; 595 unsigned char *p, *d; 596 int i; 597 unsigned long Time, l; 598#ifndef OPENSSL_NO_COMP 599 int j; 600 SSL_COMP *comp; 601#endif 602 603 buf = (unsigned char *)s->init_buf->data; 604 if (s->state == SSL3_ST_CW_CLNT_HELLO_A) { 605 SSL_SESSION *sess = s->session; 606 if ((sess == NULL) || (sess->ssl_version != s->version) || 607#ifdef OPENSSL_NO_TLSEXT 608 !sess->session_id_length || 609#else 610 (!sess->session_id_length && !sess->tlsext_tick) || 611#endif 612 (sess->not_resumable)) { 613 if (!ssl_get_new_session(s, 0)) 614 goto err; 615 } 616 /* else use the pre-loaded session */ 617 618 p = s->s3->client_random; 619 Time = (unsigned long)time(NULL); /* Time */ 620 l2n(Time, p); 621 if (RAND_pseudo_bytes(p, SSL3_RANDOM_SIZE - 4) <= 0) 622 goto err; 623 624 /* Do the message type and length last */ 625 d = p = &(buf[4]); 626 627 *(p++) = s->version >> 8; 628 *(p++) = s->version & 0xff; 629 s->client_version = s->version; 630 631 /* Random stuff */ 632 memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE); 633 p += SSL3_RANDOM_SIZE; 634 635 /* Session ID */ 636 if (s->new_session) 637 i = 0; 638 else 639 i = s->session->session_id_length; 640 *(p++) = i; 641 if (i != 0) { 642 if (i > (int)sizeof(s->session->session_id)) { 643 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); 644 goto err; 645 } 646 memcpy(p, s->session->session_id, i); 647 p += i; 648 } 649 650 /* Ciphers supported */ 651 i = ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), &(p[2]), 0); 652 if (i == 0) { 653 SSLerr(SSL_F_SSL3_CLIENT_HELLO, SSL_R_NO_CIPHERS_AVAILABLE); 654 goto err; 655 } 656 s2n(i, p); 657 p += i; 658 659 /* COMPRESSION */ 660#ifdef OPENSSL_NO_COMP 661 *(p++) = 1; 662#else 663 if (s->ctx->comp_methods == NULL) 664 j = 0; 665 else 666 j = sk_SSL_COMP_num(s->ctx->comp_methods); 667 *(p++) = 1 + j; 668 for (i = 0; i < j; i++) { 669 comp = sk_SSL_COMP_value(s->ctx->comp_methods, i); 670 *(p++) = comp->id; 671 } 672#endif 673 *(p++) = 0; /* Add the NULL method */ 674#ifndef OPENSSL_NO_TLSEXT 675 if ((p = 676 ssl_add_clienthello_tlsext(s, p, 677 buf + SSL3_RT_MAX_PLAIN_LENGTH)) == 678 NULL) { 679 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); 680 goto err; 681 } 682#endif 683 l = (p - d); 684 d = buf; 685 *(d++) = SSL3_MT_CLIENT_HELLO; 686 l2n3(l, d); 687 688 s->state = SSL3_ST_CW_CLNT_HELLO_B; 689 /* number of bytes to write */ 690 s->init_num = p - buf; 691 s->init_off = 0; 692 } 693 694 /* SSL3_ST_CW_CLNT_HELLO_B */ 695 return (ssl3_do_write(s, SSL3_RT_HANDSHAKE)); 696 err: 697 return (-1); 698} 699 700int ssl3_get_server_hello(SSL *s) 701{ 702 STACK_OF(SSL_CIPHER) *sk; 703 SSL_CIPHER *c; 704 unsigned char *p, *d; 705 int i, al, ok; 706 unsigned int j; 707 long n; 708#ifndef OPENSSL_NO_COMP 709 SSL_COMP *comp; 710#endif 711 712 n = s->method->ssl_get_message(s, 713 SSL3_ST_CR_SRVR_HELLO_A, 714 SSL3_ST_CR_SRVR_HELLO_B, -1, 20000, &ok); 715 716 if (!ok) 717 return ((int)n); 718 719 if (SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER) { 720 if (s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST) { 721 if (s->d1->send_cookie == 0) { 722 s->s3->tmp.reuse_message = 1; 723 return 1; 724 } else { /* already sent a cookie */ 725 726 al = SSL_AD_UNEXPECTED_MESSAGE; 727 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_BAD_MESSAGE_TYPE); 728 goto f_err; 729 } 730 } 731 } 732 733 if (s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO) { 734 al = SSL_AD_UNEXPECTED_MESSAGE; 735 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_BAD_MESSAGE_TYPE); 736 goto f_err; 737 } 738 739 d = p = (unsigned char *)s->init_msg; 740 741 if ((p[0] != (s->version >> 8)) || (p[1] != (s->version & 0xff))) { 742 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_WRONG_SSL_VERSION); 743 s->version = (s->version & 0xff00) | p[1]; 744 al = SSL_AD_PROTOCOL_VERSION; 745 goto f_err; 746 } 747 p += 2; 748 749 /* load the server hello data */ 750 /* load the server random */ 751 memcpy(s->s3->server_random, p, SSL3_RANDOM_SIZE); 752 p += SSL3_RANDOM_SIZE; 753 754 /* get the session-id */ 755 j = *(p++); 756 757 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE)) { 758 al = SSL_AD_ILLEGAL_PARAMETER; 759 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_SSL3_SESSION_ID_TOO_LONG); 760 goto f_err; 761 } 762 763 if (j != 0 && j == s->session->session_id_length 764 && memcmp(p, s->session->session_id, j) == 0) { 765 if (s->sid_ctx_length != s->session->sid_ctx_length 766 || memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) { 767 /* actually a client application bug */ 768 al = SSL_AD_ILLEGAL_PARAMETER; 769 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, 770 SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); 771 goto f_err; 772 } 773 s->s3->flags |= SSL3_FLAGS_CCS_OK; 774 s->hit = 1; 775 } else { /* a miss or crap from the other end */ 776 777 /* 778 * If we were trying for session-id reuse, make a new SSL_SESSION so 779 * we don't stuff up other people 780 */ 781 s->hit = 0; 782 if (s->session->session_id_length > 0) { 783 if (!ssl_get_new_session(s, 0)) { 784 al = SSL_AD_INTERNAL_ERROR; 785 goto f_err; 786 } 787 } 788 s->session->session_id_length = j; 789 memcpy(s->session->session_id, p, j); /* j could be 0 */ 790 } 791 p += j; 792 c = ssl_get_cipher_by_char(s, p); 793 if (c == NULL) { 794 /* unknown cipher */ 795 al = SSL_AD_ILLEGAL_PARAMETER; 796 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_UNKNOWN_CIPHER_RETURNED); 797 goto f_err; 798 } 799 p += ssl_put_cipher_by_char(s, NULL, NULL); 800 801 sk = ssl_get_ciphers_by_id(s); 802 i = sk_SSL_CIPHER_find(sk, c); 803 if (i < 0) { 804 /* we did not say we would use this cipher */ 805 al = SSL_AD_ILLEGAL_PARAMETER; 806 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED); 807 goto f_err; 808 } 809 810 /* 811 * Depending on the session caching (internal/external), the cipher 812 * and/or cipher_id values may not be set. Make sure that cipher_id is 813 * set and use it for comparison. 814 */ 815 if (s->session->cipher) 816 s->session->cipher_id = s->session->cipher->id; 817 if (s->hit && (s->session->cipher_id != c->id)) { 818/* Workaround is now obsolete */ 819#if 0 820 if (!(s->options & SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG)) 821#endif 822 { 823 al = SSL_AD_ILLEGAL_PARAMETER; 824 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, 825 SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); 826 goto f_err; 827 } 828 } 829 s->s3->tmp.new_cipher = c; 830 831 /* lets get the compression algorithm */ 832 /* COMPRESSION */ 833#ifdef OPENSSL_NO_COMP 834 if (*(p++) != 0) { 835 al = SSL_AD_ILLEGAL_PARAMETER; 836 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, 837 SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); 838 goto f_err; 839 } 840#else 841 j = *(p++); 842 if (j == 0) 843 comp = NULL; 844 else 845 comp = ssl3_comp_find(s->ctx->comp_methods, j); 846 847 if ((j != 0) && (comp == NULL)) { 848 al = SSL_AD_ILLEGAL_PARAMETER; 849 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, 850 SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); 851 goto f_err; 852 } else { 853 s->s3->tmp.new_compression = comp; 854 } 855#endif 856#ifndef OPENSSL_NO_TLSEXT 857 /* TLS extensions */ 858 if (s->version >= SSL3_VERSION) { 859 if (!ssl_parse_serverhello_tlsext(s, &p, d, n, &al)) { 860 /* 'al' set by ssl_parse_serverhello_tlsext */ 861 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_PARSE_TLSEXT); 862 goto f_err; 863 } 864 if (ssl_check_serverhello_tlsext(s) <= 0) { 865 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_SERVERHELLO_TLSEXT); 866 goto err; 867 } 868 } 869#endif 870 871 if (p != (d + n)) { 872 /* wrong packet length */ 873 al = SSL_AD_DECODE_ERROR; 874 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_BAD_PACKET_LENGTH); 875 goto f_err; 876 } 877 878 return (1); 879 f_err: 880 ssl3_send_alert(s, SSL3_AL_FATAL, al); 881#ifndef OPENSSL_NO_TLSEXT 882 err: 883#endif 884 return (-1); 885} 886 887int ssl3_get_server_certificate(SSL *s) 888{ 889 int al, i, ok, ret = -1; 890 unsigned long n, nc, llen, l; 891 X509 *x = NULL; 892 const unsigned char *q, *p; 893 unsigned char *d; 894 STACK_OF(X509) *sk = NULL; 895 SESS_CERT *sc; 896 EVP_PKEY *pkey = NULL; 897 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == 898 * KRB5 */ 899 900 n = s->method->ssl_get_message(s, 901 SSL3_ST_CR_CERT_A, 902 SSL3_ST_CR_CERT_B, 903 -1, s->max_cert_list, &ok); 904 905 if (!ok) 906 return ((int)n); 907 908 if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) || 909 ((s->s3->tmp.new_cipher->algorithms & SSL_aKRB5) && 910 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE))) { 911 s->s3->tmp.reuse_message = 1; 912 return (1); 913 } 914 915 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE) { 916 al = SSL_AD_UNEXPECTED_MESSAGE; 917 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, SSL_R_BAD_MESSAGE_TYPE); 918 goto f_err; 919 } 920 p = d = (unsigned char *)s->init_msg; 921 922 if ((sk = sk_X509_new_null()) == NULL) { 923 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); 924 goto err; 925 } 926 927 n2l3(p, llen); 928 if (llen + 3 != n) { 929 al = SSL_AD_DECODE_ERROR; 930 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, SSL_R_LENGTH_MISMATCH); 931 goto f_err; 932 } 933 for (nc = 0; nc < llen;) { 934 n2l3(p, l); 935 if ((l + nc + 3) > llen) { 936 al = SSL_AD_DECODE_ERROR; 937 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 938 SSL_R_CERT_LENGTH_MISMATCH); 939 goto f_err; 940 } 941 942 q = p; 943 x = d2i_X509(NULL, &q, l); 944 if (x == NULL) { 945 al = SSL_AD_BAD_CERTIFICATE; 946 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, ERR_R_ASN1_LIB); 947 goto f_err; 948 } 949 if (q != (p + l)) { 950 al = SSL_AD_DECODE_ERROR; 951 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 952 SSL_R_CERT_LENGTH_MISMATCH); 953 goto f_err; 954 } 955 if (!sk_X509_push(sk, x)) { 956 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); 957 goto err; 958 } 959 x = NULL; 960 nc += l + 3; 961 p = q; 962 } 963 964 i = ssl_verify_cert_chain(s, sk); 965 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0) 966#ifndef OPENSSL_NO_KRB5 967 && (s->s3->tmp. 968 new_cipher->algorithms & (SSL_MKEY_MASK | SSL_AUTH_MASK)) 969 != (SSL_aKRB5 | SSL_kKRB5) 970#endif /* OPENSSL_NO_KRB5 */ 971 ) { 972 al = ssl_verify_alarm_type(s->verify_result); 973 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 974 SSL_R_CERTIFICATE_VERIFY_FAILED); 975 goto f_err; 976 } 977 ERR_clear_error(); /* but we keep s->verify_result */ 978 979 sc = ssl_sess_cert_new(); 980 if (sc == NULL) 981 goto err; 982 983 if (s->session->sess_cert) 984 ssl_sess_cert_free(s->session->sess_cert); 985 s->session->sess_cert = sc; 986 987 sc->cert_chain = sk; 988 /* 989 * Inconsistency alert: cert_chain does include the peer's certificate, 990 * which we don't include in s3_srvr.c 991 */ 992 x = sk_X509_value(sk, 0); 993 sk = NULL; 994 /* 995 * VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end 996 */ 997 998 pkey = X509_get_pubkey(x); 999 1000 /* VRS: allow null cert if auth == KRB5 */ 1001 need_cert = ((s->s3->tmp.new_cipher->algorithms 1002 & (SSL_MKEY_MASK | SSL_AUTH_MASK)) 1003 == (SSL_aKRB5 | SSL_kKRB5)) ? 0 : 1; 1004 1005#ifdef KSSL_DEBUG 1006 printf("pkey,x = %p, %p\n", (void *)pkey, (void *)x); 1007 printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x, pkey)); 1008 printf("cipher, alg, nc = %s, %lx, %d\n", s->s3->tmp.new_cipher->name, 1009 s->s3->tmp.new_cipher->algorithms, need_cert); 1010#endif /* KSSL_DEBUG */ 1011 1012 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey))) { 1013 x = NULL; 1014 al = SSL3_AL_FATAL; 1015 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 1016 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); 1017 goto f_err; 1018 } 1019 1020 i = ssl_cert_type(x, pkey); 1021 if (need_cert && i < 0) { 1022 x = NULL; 1023 al = SSL3_AL_FATAL; 1024 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 1025 SSL_R_UNKNOWN_CERTIFICATE_TYPE); 1026 goto f_err; 1027 } 1028 1029 if (need_cert) { 1030 sc->peer_cert_type = i; 1031 CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509); 1032 /* 1033 * Why would the following ever happen? We just created sc a couple 1034 * of lines ago. 1035 */ 1036 if (sc->peer_pkeys[i].x509 != NULL) 1037 X509_free(sc->peer_pkeys[i].x509); 1038 sc->peer_pkeys[i].x509 = x; 1039 sc->peer_key = &(sc->peer_pkeys[i]); 1040 1041 if (s->session->peer != NULL) 1042 X509_free(s->session->peer); 1043 CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509); 1044 s->session->peer = x; 1045 } else { 1046 sc->peer_cert_type = i; 1047 sc->peer_key = NULL; 1048 1049 if (s->session->peer != NULL) 1050 X509_free(s->session->peer); 1051 s->session->peer = NULL; 1052 } 1053 s->session->verify_result = s->verify_result; 1054 1055 x = NULL; 1056 ret = 1; 1057 1058 if (0) { 1059 f_err: 1060 ssl3_send_alert(s, SSL3_AL_FATAL, al); 1061 } 1062 err: 1063 EVP_PKEY_free(pkey); 1064 X509_free(x); 1065 sk_X509_pop_free(sk, X509_free); 1066 return (ret); 1067} 1068 1069int ssl3_get_key_exchange(SSL *s) 1070{ 1071#ifndef OPENSSL_NO_RSA 1072 unsigned char *q, md_buf[EVP_MAX_MD_SIZE * 2]; 1073#endif 1074 EVP_MD_CTX md_ctx; 1075 unsigned char *param, *p; 1076 int al, j, ok; 1077 long i, param_len, n, alg; 1078 EVP_PKEY *pkey = NULL; 1079#ifndef OPENSSL_NO_RSA 1080 RSA *rsa = NULL; 1081#endif 1082#ifndef OPENSSL_NO_DH 1083 DH *dh = NULL; 1084#endif 1085#ifndef OPENSSL_NO_ECDH 1086 EC_KEY *ecdh = NULL; 1087 BN_CTX *bn_ctx = NULL; 1088 EC_POINT *srvr_ecpoint = NULL; 1089 int curve_nid = 0; 1090 int encoded_pt_len = 0; 1091#endif 1092 1093 /* 1094 * use same message size as in ssl3_get_certificate_request() as 1095 * ServerKeyExchange message may be skipped 1096 */ 1097 n = s->method->ssl_get_message(s, 1098 SSL3_ST_CR_KEY_EXCH_A, 1099 SSL3_ST_CR_KEY_EXCH_B, 1100 -1, s->max_cert_list, &ok); 1101 1102 if (!ok) 1103 return ((int)n); 1104 1105 alg = s->s3->tmp.new_cipher->algorithms; 1106 EVP_MD_CTX_init(&md_ctx); 1107 1108 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE) { 1109 /* 1110 * Can't skip server key exchange if this is an ephemeral 1111 * ciphersuite. 1112 */ 1113 if (alg & (SSL_kEDH | SSL_kECDHE)) { 1114 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); 1115 al = SSL_AD_UNEXPECTED_MESSAGE; 1116 goto f_err; 1117 } 1118 s->s3->tmp.reuse_message = 1; 1119 return (1); 1120 } 1121 1122 param = p = (unsigned char *)s->init_msg; 1123 1124 if (s->session->sess_cert != NULL) { 1125#ifndef OPENSSL_NO_RSA 1126 if (s->session->sess_cert->peer_rsa_tmp != NULL) { 1127 RSA_free(s->session->sess_cert->peer_rsa_tmp); 1128 s->session->sess_cert->peer_rsa_tmp = NULL; 1129 } 1130#endif 1131#ifndef OPENSSL_NO_DH 1132 if (s->session->sess_cert->peer_dh_tmp) { 1133 DH_free(s->session->sess_cert->peer_dh_tmp); 1134 s->session->sess_cert->peer_dh_tmp = NULL; 1135 } 1136#endif 1137#ifndef OPENSSL_NO_ECDH 1138 if (s->session->sess_cert->peer_ecdh_tmp) { 1139 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp); 1140 s->session->sess_cert->peer_ecdh_tmp = NULL; 1141 } 1142#endif 1143 } else { 1144 s->session->sess_cert = ssl_sess_cert_new(); 1145 } 1146 1147 /* Total length of the parameters including the length prefix */ 1148 param_len = 0; 1149 1150 al = SSL_AD_DECODE_ERROR; 1151#ifndef OPENSSL_NO_RSA 1152 if (alg & SSL_kRSA) { 1153 /* Temporary RSA keys only allowed in export ciphersuites */ 1154 if (!SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)) { 1155 al = SSL_AD_UNEXPECTED_MESSAGE; 1156 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); 1157 goto f_err; 1158 } 1159 if ((rsa = RSA_new()) == NULL) { 1160 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); 1161 goto err; 1162 } 1163 1164 param_len = 2; 1165 if (param_len > n) { 1166 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); 1167 goto f_err; 1168 } 1169 n2s(p, i); 1170 1171 if (i > n - param_len) { 1172 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_RSA_MODULUS_LENGTH); 1173 goto f_err; 1174 } 1175 param_len += i; 1176 1177 if (!(rsa->n = BN_bin2bn(p, i, rsa->n))) { 1178 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); 1179 goto err; 1180 } 1181 p += i; 1182 1183 if (2 > n - param_len) { 1184 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); 1185 goto f_err; 1186 } 1187 param_len += 2; 1188 1189 n2s(p, i); 1190 1191 if (i > n - param_len) { 1192 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_RSA_E_LENGTH); 1193 goto f_err; 1194 } 1195 param_len += i; 1196 1197 if (!(rsa->e = BN_bin2bn(p, i, rsa->e))) { 1198 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); 1199 goto err; 1200 } 1201 p += i; 1202 n -= param_len; 1203 1204 /* this should be because we are using an export cipher */ 1205 if (alg & SSL_aRSA) 1206 pkey = 1207 X509_get_pubkey(s->session-> 1208 sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1209 else { 1210 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); 1211 goto err; 1212 } 1213 s->session->sess_cert->peer_rsa_tmp = rsa; 1214 rsa = NULL; 1215 } 1216#else /* OPENSSL_NO_RSA */ 1217 if (0) ; 1218#endif 1219#ifndef OPENSSL_NO_DH 1220 else if (alg & SSL_kEDH) { 1221 if ((dh = DH_new()) == NULL) { 1222 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_DH_LIB); 1223 goto err; 1224 } 1225 1226 param_len = 2; 1227 if (param_len > n) { 1228 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); 1229 goto f_err; 1230 } 1231 n2s(p, i); 1232 1233 if (i > n - param_len) { 1234 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_DH_P_LENGTH); 1235 goto f_err; 1236 } 1237 param_len += i; 1238 1239 if (!(dh->p = BN_bin2bn(p, i, NULL))) { 1240 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); 1241 goto err; 1242 } 1243 p += i; 1244 1245 if (2 > n - param_len) { 1246 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); 1247 goto f_err; 1248 } 1249 param_len += 2; 1250 1251 n2s(p, i); 1252 1253 if (i > n - param_len) { 1254 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_DH_G_LENGTH); 1255 goto f_err; 1256 } 1257 param_len += i; 1258 1259 if (!(dh->g = BN_bin2bn(p, i, NULL))) { 1260 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); 1261 goto err; 1262 } 1263 p += i; 1264 1265 if (2 > n - param_len) { 1266 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); 1267 goto f_err; 1268 } 1269 param_len += 2; 1270 1271 n2s(p, i); 1272 1273 if (i > n - param_len) { 1274 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_DH_PUB_KEY_LENGTH); 1275 goto f_err; 1276 } 1277 param_len += i; 1278 1279 if (!(dh->pub_key = BN_bin2bn(p, i, NULL))) { 1280 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); 1281 goto err; 1282 } 1283 p += i; 1284 n -= param_len; 1285 1286# ifndef OPENSSL_NO_RSA 1287 if (alg & SSL_aRSA) 1288 pkey = 1289 X509_get_pubkey(s->session-> 1290 sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1291# else 1292 if (0) ; 1293# endif 1294# ifndef OPENSSL_NO_DSA 1295 else if (alg & SSL_aDSS) 1296 pkey = 1297 X509_get_pubkey(s->session-> 1298 sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN]. 1299 x509); 1300# endif 1301 /* else anonymous DH, so no certificate or pkey. */ 1302 1303 s->session->sess_cert->peer_dh_tmp = dh; 1304 dh = NULL; 1305 } else if ((alg & SSL_kDHr) || (alg & SSL_kDHd)) { 1306 al = SSL_AD_ILLEGAL_PARAMETER; 1307 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1308 SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER); 1309 goto f_err; 1310 } 1311#endif /* !OPENSSL_NO_DH */ 1312 1313#ifndef OPENSSL_NO_ECDH 1314 else if (alg & SSL_kECDHE) { 1315 EC_GROUP *ngroup; 1316 const EC_GROUP *group; 1317 1318 if ((ecdh = EC_KEY_new()) == NULL) { 1319 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); 1320 goto err; 1321 } 1322 1323 /* 1324 * Extract elliptic curve parameters and the server's ephemeral ECDH 1325 * public key. Keep accumulating lengths of various components in 1326 * param_len and make sure it never exceeds n. 1327 */ 1328 1329 /* 1330 * XXX: For now we only support named (not generic) curves and the 1331 * ECParameters in this case is just three bytes. We also need one 1332 * byte for the length of the encoded point 1333 */ 1334 param_len = 4; 1335 if (param_len > n) { 1336 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); 1337 goto f_err; 1338 } 1339 1340 if ((*p != NAMED_CURVE_TYPE) || 1341 ((curve_nid = curve_id2nid(*(p + 2))) == 0)) { 1342 al = SSL_AD_INTERNAL_ERROR; 1343 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1344 SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); 1345 goto f_err; 1346 } 1347 1348 ngroup = EC_GROUP_new_by_curve_name(curve_nid); 1349 if (ngroup == NULL) { 1350 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_EC_LIB); 1351 goto err; 1352 } 1353 if (EC_KEY_set_group(ecdh, ngroup) == 0) { 1354 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_EC_LIB); 1355 goto err; 1356 } 1357 EC_GROUP_free(ngroup); 1358 1359 group = EC_KEY_get0_group(ecdh); 1360 1361 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && 1362 (EC_GROUP_get_degree(group) > 163)) { 1363 al = SSL_AD_EXPORT_RESTRICTION; 1364 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1365 SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER); 1366 goto f_err; 1367 } 1368 1369 p += 3; 1370 1371 /* Next, get the encoded ECPoint */ 1372 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) || 1373 ((bn_ctx = BN_CTX_new()) == NULL)) { 1374 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); 1375 goto err; 1376 } 1377 1378 encoded_pt_len = *p; /* length of encoded point */ 1379 p += 1; 1380 1381 if ((encoded_pt_len > n - param_len) || 1382 (EC_POINT_oct2point(group, srvr_ecpoint, 1383 p, encoded_pt_len, bn_ctx) == 0)) { 1384 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_ECPOINT); 1385 goto f_err; 1386 } 1387 param_len += encoded_pt_len; 1388 1389 n -= param_len; 1390 p += encoded_pt_len; 1391 1392 /* 1393 * The ECC/TLS specification does not mention the use of DSA to sign 1394 * ECParameters in the server key exchange message. We do support RSA 1395 * and ECDSA. 1396 */ 1397 if (0) ; 1398# ifndef OPENSSL_NO_RSA 1399 else if (alg & SSL_aRSA) 1400 pkey = 1401 X509_get_pubkey(s->session-> 1402 sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1403# endif 1404# ifndef OPENSSL_NO_ECDSA 1405 else if (alg & SSL_aECDSA) 1406 pkey = 1407 X509_get_pubkey(s->session-> 1408 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509); 1409# endif 1410 /* else anonymous ECDH, so no certificate or pkey. */ 1411 EC_KEY_set_public_key(ecdh, srvr_ecpoint); 1412 s->session->sess_cert->peer_ecdh_tmp = ecdh; 1413 ecdh = NULL; 1414 BN_CTX_free(bn_ctx); 1415 bn_ctx = NULL; 1416 EC_POINT_free(srvr_ecpoint); 1417 srvr_ecpoint = NULL; 1418 } else if (alg & SSL_kECDH) { 1419 al = SSL_AD_UNEXPECTED_MESSAGE; 1420 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); 1421 goto f_err; 1422 } 1423#endif /* !OPENSSL_NO_ECDH */ 1424 if (alg & SSL_aFZA) { 1425 al = SSL_AD_HANDSHAKE_FAILURE; 1426 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1427 SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER); 1428 goto f_err; 1429 } 1430 1431 /* p points to the next byte, there are 'n' bytes left */ 1432 1433 /* if it was signed, check the signature */ 1434 if (pkey != NULL) { 1435 n2s(p, i); 1436 n -= 2; 1437 j = EVP_PKEY_size(pkey); 1438 1439 /* 1440 * Check signature length. If n is 0 then signature is empty 1441 */ 1442 if ((i != n) || (n > j) || (n <= 0)) { 1443 /* wrong packet length */ 1444 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_WRONG_SIGNATURE_LENGTH); 1445 goto f_err; 1446 } 1447#ifndef OPENSSL_NO_RSA 1448 if (pkey->type == EVP_PKEY_RSA) { 1449 int num; 1450 unsigned int size; 1451 1452 j = 0; 1453 q = md_buf; 1454 for (num = 2; num > 0; num--) { 1455 EVP_MD_CTX_set_flags(&md_ctx, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW); 1456 EVP_DigestInit_ex(&md_ctx, (num == 2) 1457 ? s->ctx->md5 : s->ctx->sha1, NULL); 1458 EVP_DigestUpdate(&md_ctx, &(s->s3->client_random[0]), 1459 SSL3_RANDOM_SIZE); 1460 EVP_DigestUpdate(&md_ctx, &(s->s3->server_random[0]), 1461 SSL3_RANDOM_SIZE); 1462 EVP_DigestUpdate(&md_ctx, param, param_len); 1463 EVP_DigestFinal_ex(&md_ctx, q, &size); 1464 q += size; 1465 j += size; 1466 } 1467 i = RSA_verify(NID_md5_sha1, md_buf, j, p, n, pkey->pkey.rsa); 1468 if (i < 0) { 1469 al = SSL_AD_DECRYPT_ERROR; 1470 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_RSA_DECRYPT); 1471 goto f_err; 1472 } 1473 if (i == 0) { 1474 /* bad signature */ 1475 al = SSL_AD_DECRYPT_ERROR; 1476 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE); 1477 goto f_err; 1478 } 1479 } else 1480#endif 1481#ifndef OPENSSL_NO_DSA 1482 if (pkey->type == EVP_PKEY_DSA) { 1483 /* lets do DSS */ 1484 EVP_VerifyInit_ex(&md_ctx, EVP_dss1(), NULL); 1485 EVP_VerifyUpdate(&md_ctx, &(s->s3->client_random[0]), 1486 SSL3_RANDOM_SIZE); 1487 EVP_VerifyUpdate(&md_ctx, &(s->s3->server_random[0]), 1488 SSL3_RANDOM_SIZE); 1489 EVP_VerifyUpdate(&md_ctx, param, param_len); 1490 if (EVP_VerifyFinal(&md_ctx, p, (int)n, pkey) <= 0) { 1491 /* bad signature */ 1492 al = SSL_AD_DECRYPT_ERROR; 1493 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE); 1494 goto f_err; 1495 } 1496 } else 1497#endif 1498#ifndef OPENSSL_NO_ECDSA 1499 if (pkey->type == EVP_PKEY_EC) { 1500 /* let's do ECDSA */ 1501 EVP_VerifyInit_ex(&md_ctx, EVP_ecdsa(), NULL); 1502 EVP_VerifyUpdate(&md_ctx, &(s->s3->client_random[0]), 1503 SSL3_RANDOM_SIZE); 1504 EVP_VerifyUpdate(&md_ctx, &(s->s3->server_random[0]), 1505 SSL3_RANDOM_SIZE); 1506 EVP_VerifyUpdate(&md_ctx, param, param_len); 1507 if (EVP_VerifyFinal(&md_ctx, p, (int)n, pkey) <= 0) { 1508 /* bad signature */ 1509 al = SSL_AD_DECRYPT_ERROR; 1510 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE); 1511 goto f_err; 1512 } 1513 } else 1514#endif 1515 { 1516 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); 1517 goto err; 1518 } 1519 } else { 1520 /* still data left over */ 1521 if (!(alg & SSL_aNULL)) { 1522 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); 1523 goto err; 1524 } 1525 if (n != 0) { 1526 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_EXTRA_DATA_IN_MESSAGE); 1527 goto f_err; 1528 } 1529 } 1530 EVP_PKEY_free(pkey); 1531 EVP_MD_CTX_cleanup(&md_ctx); 1532 return (1); 1533 f_err: 1534 ssl3_send_alert(s, SSL3_AL_FATAL, al); 1535 err: 1536 EVP_PKEY_free(pkey); 1537#ifndef OPENSSL_NO_RSA 1538 if (rsa != NULL) 1539 RSA_free(rsa); 1540#endif 1541#ifndef OPENSSL_NO_DH 1542 if (dh != NULL) 1543 DH_free(dh); 1544#endif 1545#ifndef OPENSSL_NO_ECDH 1546 BN_CTX_free(bn_ctx); 1547 EC_POINT_free(srvr_ecpoint); 1548 if (ecdh != NULL) 1549 EC_KEY_free(ecdh); 1550#endif 1551 EVP_MD_CTX_cleanup(&md_ctx); 1552 return (-1); 1553} 1554 1555int ssl3_get_certificate_request(SSL *s) 1556{ 1557 int ok, ret = 0; 1558 unsigned long n, nc, l; 1559 unsigned int llen, ctype_num, i; 1560 X509_NAME *xn = NULL; 1561 const unsigned char *p, *q; 1562 unsigned char *d; 1563 STACK_OF(X509_NAME) *ca_sk = NULL; 1564 1565 n = s->method->ssl_get_message(s, 1566 SSL3_ST_CR_CERT_REQ_A, 1567 SSL3_ST_CR_CERT_REQ_B, 1568 -1, s->max_cert_list, &ok); 1569 1570 if (!ok) 1571 return ((int)n); 1572 1573 s->s3->tmp.cert_req = 0; 1574 1575 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE) { 1576 s->s3->tmp.reuse_message = 1; 1577 return (1); 1578 } 1579 1580 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST) { 1581 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE); 1582 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, SSL_R_WRONG_MESSAGE_TYPE); 1583 goto err; 1584 } 1585 1586 /* TLS does not like anon-DH with client cert */ 1587 if (s->version > SSL3_VERSION) { 1588 l = s->s3->tmp.new_cipher->algorithms; 1589 if (l & SSL_aNULL) { 1590 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE); 1591 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, 1592 SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER); 1593 goto err; 1594 } 1595 } 1596 1597 p = d = (unsigned char *)s->init_msg; 1598 1599 if ((ca_sk = sk_X509_NAME_new(ca_dn_cmp)) == NULL) { 1600 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); 1601 goto err; 1602 } 1603 1604 /* get the certificate types */ 1605 ctype_num = *(p++); 1606 if (ctype_num > SSL3_CT_NUMBER) 1607 ctype_num = SSL3_CT_NUMBER; 1608 for (i = 0; i < ctype_num; i++) 1609 s->s3->tmp.ctype[i] = p[i]; 1610 p += ctype_num; 1611 1612 /* get the CA RDNs */ 1613 n2s(p, llen); 1614#if 0 1615 { 1616 FILE *out; 1617 out = fopen("/tmp/vsign.der", "w"); 1618 fwrite(p, 1, llen, out); 1619 fclose(out); 1620 } 1621#endif 1622 1623 if ((llen + ctype_num + 2 + 1) != n) { 1624 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); 1625 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH); 1626 goto err; 1627 } 1628 1629 for (nc = 0; nc < llen;) { 1630 n2s(p, l); 1631 if ((l + nc + 2) > llen) { 1632 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG)) 1633 goto cont; /* netscape bugs */ 1634 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); 1635 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, SSL_R_CA_DN_TOO_LONG); 1636 goto err; 1637 } 1638 1639 q = p; 1640 1641 if ((xn = d2i_X509_NAME(NULL, &q, l)) == NULL) { 1642 /* If netscape tolerance is on, ignore errors */ 1643 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG) 1644 goto cont; 1645 else { 1646 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); 1647 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_ASN1_LIB); 1648 goto err; 1649 } 1650 } 1651 1652 if (q != (p + l)) { 1653 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); 1654 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, 1655 SSL_R_CA_DN_LENGTH_MISMATCH); 1656 goto err; 1657 } 1658 if (!sk_X509_NAME_push(ca_sk, xn)) { 1659 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); 1660 goto err; 1661 } 1662 1663 p += l; 1664 nc += l + 2; 1665 } 1666 1667 if (0) { 1668 cont: 1669 ERR_clear_error(); 1670 } 1671 1672 /* we should setup a certificate to return.... */ 1673 s->s3->tmp.cert_req = 1; 1674 s->s3->tmp.ctype_num = ctype_num; 1675 if (s->s3->tmp.ca_names != NULL) 1676 sk_X509_NAME_pop_free(s->s3->tmp.ca_names, X509_NAME_free); 1677 s->s3->tmp.ca_names = ca_sk; 1678 ca_sk = NULL; 1679 1680 ret = 1; 1681 err: 1682 if (ca_sk != NULL) 1683 sk_X509_NAME_pop_free(ca_sk, X509_NAME_free); 1684 return (ret); 1685} 1686 1687static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b) 1688{ 1689 return (X509_NAME_cmp(*a, *b)); 1690} 1691 1692#ifndef OPENSSL_NO_TLSEXT 1693int ssl3_get_new_session_ticket(SSL *s) 1694{ 1695 int ok, al, ret = 0, ticklen; 1696 long n; 1697 const unsigned char *p; 1698 unsigned char *d; 1699 1700 n = s->method->ssl_get_message(s, 1701 SSL3_ST_CR_SESSION_TICKET_A, 1702 SSL3_ST_CR_SESSION_TICKET_B, 1703 -1, 16384, &ok); 1704 1705 if (!ok) 1706 return ((int)n); 1707 1708 if (s->s3->tmp.message_type == SSL3_MT_FINISHED) { 1709 s->s3->tmp.reuse_message = 1; 1710 return (1); 1711 } 1712 if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET) { 1713 al = SSL_AD_UNEXPECTED_MESSAGE; 1714 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, SSL_R_BAD_MESSAGE_TYPE); 1715 goto f_err; 1716 } 1717 if (n < 6) { 1718 /* need at least ticket_lifetime_hint + ticket length */ 1719 al = SSL_AD_DECODE_ERROR; 1720 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); 1721 goto f_err; 1722 } 1723 1724 p = d = (unsigned char *)s->init_msg; 1725 1726 if (s->session->session_id_length > 0) { 1727 int i = s->session_ctx->session_cache_mode; 1728 SSL_SESSION *new_sess; 1729 /* 1730 * We reused an existing session, so we need to replace it with a new 1731 * one 1732 */ 1733 if (i & SSL_SESS_CACHE_CLIENT) { 1734 /* 1735 * Remove the old session from the cache 1736 */ 1737 if (i & SSL_SESS_CACHE_NO_INTERNAL_STORE) { 1738 if (s->session_ctx->remove_session_cb != NULL) 1739 s->session_ctx->remove_session_cb(s->session_ctx, 1740 s->session); 1741 } else { 1742 /* We carry on if this fails */ 1743 SSL_CTX_remove_session(s->session_ctx, s->session); 1744 } 1745 } 1746 1747 if ((new_sess = ssl_session_dup(s->session, 0)) == 0) { 1748 al = SSL_AD_INTERNAL_ERROR; 1749 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); 1750 goto f_err; 1751 } 1752 1753 SSL_SESSION_free(s->session); 1754 s->session = new_sess; 1755 } 1756 1757 n2l(p, s->session->tlsext_tick_lifetime_hint); 1758 n2s(p, ticklen); 1759 /* ticket_lifetime_hint + ticket_length + ticket */ 1760 if (ticklen + 6 != n) { 1761 al = SSL_AD_DECODE_ERROR; 1762 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); 1763 goto f_err; 1764 } 1765 if (s->session->tlsext_tick) { 1766 OPENSSL_free(s->session->tlsext_tick); 1767 s->session->tlsext_ticklen = 0; 1768 } 1769 s->session->tlsext_tick = OPENSSL_malloc(ticklen); 1770 if (!s->session->tlsext_tick) { 1771 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); 1772 goto err; 1773 } 1774 memcpy(s->session->tlsext_tick, p, ticklen); 1775 s->session->tlsext_ticklen = ticklen; 1776 /* 1777 * There are two ways to detect a resumed ticket sesion. One is to set an 1778 * appropriate session ID and then the server must return a match in 1779 * ServerHello. This allows the normal client session ID matching to work 1780 * and we know much earlier that the ticket has been accepted. The 1781 * other way is to set zero length session ID when the ticket is 1782 * presented and rely on the handshake to determine session resumption. 1783 * We choose the former approach because this fits in with assumptions 1784 * elsewhere in OpenSSL. The session ID is set to the SHA256 (or SHA1 is 1785 * SHA256 is disabled) hash of the ticket. 1786 */ 1787 EVP_Digest(p, ticklen, 1788 s->session->session_id, &s->session->session_id_length, 1789# ifndef OPENSSL_NO_SHA256 1790 EVP_sha256(), NULL); 1791# else 1792 EVP_sha1(), NULL); 1793# endif 1794 ret = 1; 1795 return (ret); 1796 f_err: 1797 ssl3_send_alert(s, SSL3_AL_FATAL, al); 1798 err: 1799 return (-1); 1800} 1801 1802int ssl3_get_cert_status(SSL *s) 1803{ 1804 int ok, al; 1805 unsigned long resplen; 1806 long n; 1807 const unsigned char *p; 1808 1809 n = s->method->ssl_get_message(s, 1810 SSL3_ST_CR_CERT_STATUS_A, 1811 SSL3_ST_CR_CERT_STATUS_B, 1812 SSL3_MT_CERTIFICATE_STATUS, 16384, &ok); 1813 1814 if (!ok) 1815 return ((int)n); 1816 if (n < 4) { 1817 /* need at least status type + length */ 1818 al = SSL_AD_DECODE_ERROR; 1819 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, SSL_R_LENGTH_MISMATCH); 1820 goto f_err; 1821 } 1822 p = (unsigned char *)s->init_msg; 1823 if (*p++ != TLSEXT_STATUSTYPE_ocsp) { 1824 al = SSL_AD_DECODE_ERROR; 1825 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, SSL_R_UNSUPPORTED_STATUS_TYPE); 1826 goto f_err; 1827 } 1828 n2l3(p, resplen); 1829 if (resplen + 4 != (unsigned long)n) { 1830 al = SSL_AD_DECODE_ERROR; 1831 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, SSL_R_LENGTH_MISMATCH); 1832 goto f_err; 1833 } 1834 if (s->tlsext_ocsp_resp) 1835 OPENSSL_free(s->tlsext_ocsp_resp); 1836 s->tlsext_ocsp_resp = BUF_memdup(p, resplen); 1837 if (!s->tlsext_ocsp_resp) { 1838 al = SSL_AD_INTERNAL_ERROR; 1839 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, ERR_R_MALLOC_FAILURE); 1840 goto f_err; 1841 } 1842 s->tlsext_ocsp_resplen = resplen; 1843 if (s->ctx->tlsext_status_cb) { 1844 int ret; 1845 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg); 1846 if (ret == 0) { 1847 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE; 1848 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, SSL_R_INVALID_STATUS_RESPONSE); 1849 goto f_err; 1850 } 1851 if (ret < 0) { 1852 al = SSL_AD_INTERNAL_ERROR; 1853 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, ERR_R_MALLOC_FAILURE); 1854 goto f_err; 1855 } 1856 } 1857 return 1; 1858 f_err: 1859 ssl3_send_alert(s, SSL3_AL_FATAL, al); 1860 return (-1); 1861} 1862#endif 1863 1864int ssl3_get_server_done(SSL *s) 1865{ 1866 int ok, ret = 0; 1867 long n; 1868 1869 /* Second to last param should be very small, like 0 :-) */ 1870 n = s->method->ssl_get_message(s, 1871 SSL3_ST_CR_SRVR_DONE_A, 1872 SSL3_ST_CR_SRVR_DONE_B, 1873 SSL3_MT_SERVER_DONE, 30, &ok); 1874 1875 if (!ok) 1876 return ((int)n); 1877 if (n > 0) { 1878 /* should contain no data */ 1879 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); 1880 SSLerr(SSL_F_SSL3_GET_SERVER_DONE, SSL_R_LENGTH_MISMATCH); 1881 return -1; 1882 } 1883 ret = 1; 1884 return (ret); 1885} 1886 1887int ssl3_send_client_key_exchange(SSL *s) 1888{ 1889 unsigned char *p, *d; 1890 int n; 1891 unsigned long l; 1892#ifndef OPENSSL_NO_RSA 1893 unsigned char *q; 1894 EVP_PKEY *pkey = NULL; 1895#endif 1896#ifndef OPENSSL_NO_KRB5 1897 KSSL_ERR kssl_err; 1898#endif /* OPENSSL_NO_KRB5 */ 1899#ifndef OPENSSL_NO_ECDH 1900 EC_KEY *clnt_ecdh = NULL; 1901 const EC_POINT *srvr_ecpoint = NULL; 1902 EVP_PKEY *srvr_pub_pkey = NULL; 1903 unsigned char *encodedPoint = NULL; 1904 int encoded_pt_len = 0; 1905 BN_CTX *bn_ctx = NULL; 1906#endif 1907 1908 if (s->state == SSL3_ST_CW_KEY_EXCH_A) { 1909 d = (unsigned char *)s->init_buf->data; 1910 p = &(d[4]); 1911 1912 l = s->s3->tmp.new_cipher->algorithms; 1913 1914 /* Fool emacs indentation */ 1915 if (0) { 1916 } 1917#ifndef OPENSSL_NO_RSA 1918 else if (l & SSL_kRSA) { 1919 RSA *rsa; 1920 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; 1921 1922 if (s->session->sess_cert == NULL) { 1923 /* 1924 * We should always have a server certificate with SSL_kRSA. 1925 */ 1926 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 1927 ERR_R_INTERNAL_ERROR); 1928 goto err; 1929 } 1930 1931 if (s->session->sess_cert->peer_rsa_tmp != NULL) 1932 rsa = s->session->sess_cert->peer_rsa_tmp; 1933 else { 1934 pkey = 1935 X509_get_pubkey(s->session-> 1936 sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC]. 1937 x509); 1938 if ((pkey == NULL) || (pkey->type != EVP_PKEY_RSA) 1939 || (pkey->pkey.rsa == NULL)) { 1940 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 1941 ERR_R_INTERNAL_ERROR); 1942 goto err; 1943 } 1944 rsa = pkey->pkey.rsa; 1945 EVP_PKEY_free(pkey); 1946 } 1947 1948 tmp_buf[0] = s->client_version >> 8; 1949 tmp_buf[1] = s->client_version & 0xff; 1950 if (RAND_bytes(&(tmp_buf[2]), sizeof tmp_buf - 2) <= 0) 1951 goto err; 1952 1953 s->session->master_key_length = sizeof tmp_buf; 1954 1955 q = p; 1956 /* Fix buf for TLS and beyond */ 1957 if (s->version > SSL3_VERSION) 1958 p += 2; 1959 n = RSA_public_encrypt(sizeof tmp_buf, 1960 tmp_buf, p, rsa, RSA_PKCS1_PADDING); 1961# ifdef PKCS1_CHECK 1962 if (s->options & SSL_OP_PKCS1_CHECK_1) 1963 p[1]++; 1964 if (s->options & SSL_OP_PKCS1_CHECK_2) 1965 tmp_buf[0] = 0x70; 1966# endif 1967 if (n <= 0) { 1968 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 1969 SSL_R_BAD_RSA_ENCRYPT); 1970 goto err; 1971 } 1972 1973 /* Fix buf for TLS and beyond */ 1974 if (s->version > SSL3_VERSION) { 1975 s2n(n, q); 1976 n += 2; 1977 } 1978 1979 s->session->master_key_length = 1980 s->method->ssl3_enc->generate_master_secret(s, 1981 s-> 1982 session->master_key, 1983 tmp_buf, 1984 sizeof tmp_buf); 1985 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf); 1986 } 1987#endif 1988#ifndef OPENSSL_NO_KRB5 1989 else if (l & SSL_kKRB5) { 1990 krb5_error_code krb5rc; 1991 KSSL_CTX *kssl_ctx = s->kssl_ctx; 1992 /* krb5_data krb5_ap_req; */ 1993 krb5_data *enc_ticket; 1994 krb5_data authenticator, *authp = NULL; 1995 EVP_CIPHER_CTX ciph_ctx; 1996 EVP_CIPHER *enc = NULL; 1997 unsigned char iv[EVP_MAX_IV_LENGTH]; 1998 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; 1999 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH + EVP_MAX_IV_LENGTH]; 2000 int padl, outl = sizeof(epms); 2001 2002 EVP_CIPHER_CTX_init(&ciph_ctx); 2003 2004# ifdef KSSL_DEBUG 2005 printf("ssl3_send_client_key_exchange(%lx & %lx)\n", 2006 l, SSL_kKRB5); 2007# endif /* KSSL_DEBUG */ 2008 2009 authp = NULL; 2010# ifdef KRB5SENDAUTH 2011 if (KRB5SENDAUTH) 2012 authp = &authenticator; 2013# endif /* KRB5SENDAUTH */ 2014 2015 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp, &kssl_err); 2016 enc = kssl_map_enc(kssl_ctx->enctype); 2017 if (enc == NULL) 2018 goto err; 2019# ifdef KSSL_DEBUG 2020 { 2021 printf("kssl_cget_tkt rtn %d\n", krb5rc); 2022 if (krb5rc && kssl_err.text) 2023 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text); 2024 } 2025# endif /* KSSL_DEBUG */ 2026 2027 if (krb5rc) { 2028 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); 2029 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, kssl_err.reason); 2030 goto err; 2031 } 2032 2033 /*- 2034 * 20010406 VRS - Earlier versions used KRB5 AP_REQ 2035 * in place of RFC 2712 KerberosWrapper, as in: 2036 * 2037 * Send ticket (copy to *p, set n = length) 2038 * n = krb5_ap_req.length; 2039 * memcpy(p, krb5_ap_req.data, krb5_ap_req.length); 2040 * if (krb5_ap_req.data) 2041 * kssl_krb5_free_data_contents(NULL,&krb5_ap_req); 2042 * 2043 * Now using real RFC 2712 KerberosWrapper 2044 * (Thanks to Simon Wilkinson <sxw@sxw.org.uk>) 2045 * Note: 2712 "opaque" types are here replaced 2046 * with a 2-byte length followed by the value. 2047 * Example: 2048 * KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms 2049 * Where "xx xx" = length bytes. Shown here with 2050 * optional authenticator omitted. 2051 */ 2052 2053 /* KerberosWrapper.Ticket */ 2054 s2n(enc_ticket->length, p); 2055 memcpy(p, enc_ticket->data, enc_ticket->length); 2056 p += enc_ticket->length; 2057 n = enc_ticket->length + 2; 2058 2059 /* KerberosWrapper.Authenticator */ 2060 if (authp && authp->length) { 2061 s2n(authp->length, p); 2062 memcpy(p, authp->data, authp->length); 2063 p += authp->length; 2064 n += authp->length + 2; 2065 2066 free(authp->data); 2067 authp->data = NULL; 2068 authp->length = 0; 2069 } else { 2070 s2n(0, p); /* null authenticator length */ 2071 n += 2; 2072 } 2073 2074 tmp_buf[0] = s->client_version >> 8; 2075 tmp_buf[1] = s->client_version & 0xff; 2076 if (RAND_bytes(&(tmp_buf[2]), sizeof tmp_buf - 2) <= 0) 2077 goto err; 2078 2079 /*- 2080 * 20010420 VRS. Tried it this way; failed. 2081 * EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL); 2082 * EVP_CIPHER_CTX_set_key_length(&ciph_ctx, 2083 * kssl_ctx->length); 2084 * EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv); 2085 */ 2086 2087 memset(iv, 0, sizeof iv); /* per RFC 1510 */ 2088 EVP_EncryptInit_ex(&ciph_ctx, enc, NULL, kssl_ctx->key, iv); 2089 EVP_EncryptUpdate(&ciph_ctx, epms, &outl, tmp_buf, 2090 sizeof tmp_buf); 2091 EVP_EncryptFinal_ex(&ciph_ctx, &(epms[outl]), &padl); 2092 outl += padl; 2093 if (outl > sizeof epms) { 2094 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2095 ERR_R_INTERNAL_ERROR); 2096 goto err; 2097 } 2098 EVP_CIPHER_CTX_cleanup(&ciph_ctx); 2099 2100 /* KerberosWrapper.EncryptedPreMasterSecret */ 2101 s2n(outl, p); 2102 memcpy(p, epms, outl); 2103 p += outl; 2104 n += outl + 2; 2105 2106 s->session->master_key_length = 2107 s->method->ssl3_enc->generate_master_secret(s, 2108 s-> 2109 session->master_key, 2110 tmp_buf, 2111 sizeof tmp_buf); 2112 2113 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf); 2114 OPENSSL_cleanse(epms, outl); 2115 } 2116#endif 2117#ifndef OPENSSL_NO_DH 2118 else if (l & (SSL_kEDH | SSL_kDHr | SSL_kDHd)) { 2119 DH *dh_srvr, *dh_clnt; 2120 2121 if (s->session->sess_cert == NULL) { 2122 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE); 2123 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2124 SSL_R_UNEXPECTED_MESSAGE); 2125 goto err; 2126 } 2127 2128 if (s->session->sess_cert->peer_dh_tmp != NULL) 2129 dh_srvr = s->session->sess_cert->peer_dh_tmp; 2130 else { 2131 /* we get them from the cert */ 2132 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); 2133 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2134 SSL_R_UNABLE_TO_FIND_DH_PARAMETERS); 2135 goto err; 2136 } 2137 2138 /* generate a new random key */ 2139 if ((dh_clnt = DHparams_dup(dh_srvr)) == NULL) { 2140 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB); 2141 goto err; 2142 } 2143 if (!DH_generate_key(dh_clnt)) { 2144 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB); 2145 goto err; 2146 } 2147 2148 /* 2149 * use the 'p' output buffer for the DH key, but make sure to 2150 * clear it out afterwards 2151 */ 2152 2153 n = DH_compute_key(p, dh_srvr->pub_key, dh_clnt); 2154 2155 if (n <= 0) { 2156 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB); 2157 goto err; 2158 } 2159 2160 /* generate master key from the result */ 2161 s->session->master_key_length = 2162 s->method->ssl3_enc->generate_master_secret(s, 2163 s-> 2164 session->master_key, 2165 p, n); 2166 /* clean up */ 2167 memset(p, 0, n); 2168 2169 /* send off the data */ 2170 n = BN_num_bytes(dh_clnt->pub_key); 2171 s2n(n, p); 2172 BN_bn2bin(dh_clnt->pub_key, p); 2173 n += 2; 2174 2175 DH_free(dh_clnt); 2176 2177 /* perhaps clean things up a bit EAY EAY EAY EAY */ 2178 } 2179#endif 2180 2181#ifndef OPENSSL_NO_ECDH 2182 else if ((l & SSL_kECDH) || (l & SSL_kECDHE)) { 2183 const EC_GROUP *srvr_group = NULL; 2184 EC_KEY *tkey; 2185 int ecdh_clnt_cert = 0; 2186 int field_size = 0; 2187 2188 if (s->session->sess_cert == NULL) { 2189 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE); 2190 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2191 SSL_R_UNEXPECTED_MESSAGE); 2192 goto err; 2193 } 2194 2195 /* 2196 * Did we send out the client's ECDH share for use in premaster 2197 * computation as part of client certificate? If so, set 2198 * ecdh_clnt_cert to 1. 2199 */ 2200 if ((l & SSL_kECDH) && (s->cert != NULL)) { 2201 /*- 2202 * XXX: For now, we do not support client 2203 * authentication using ECDH certificates. 2204 * To add such support, one needs to add 2205 * code that checks for appropriate 2206 * conditions and sets ecdh_clnt_cert to 1. 2207 * For example, the cert have an ECC 2208 * key on the same curve as the server's 2209 * and the key should be authorized for 2210 * key agreement. 2211 * 2212 * One also needs to add code in ssl3_connect 2213 * to skip sending the certificate verify 2214 * message. 2215 * 2216 * if ((s->cert->key->privatekey != NULL) && 2217 * (s->cert->key->privatekey->type == 2218 * EVP_PKEY_EC) && ...) 2219 * ecdh_clnt_cert = 1; 2220 */ 2221 } 2222 2223 if (s->session->sess_cert->peer_ecdh_tmp != NULL) { 2224 tkey = s->session->sess_cert->peer_ecdh_tmp; 2225 } else { 2226 /* Get the Server Public Key from Cert */ 2227 srvr_pub_pkey = 2228 X509_get_pubkey(s->session-> 2229 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509); 2230 if ((srvr_pub_pkey == NULL) 2231 || (srvr_pub_pkey->type != EVP_PKEY_EC) 2232 || (srvr_pub_pkey->pkey.ec == NULL)) { 2233 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2234 ERR_R_INTERNAL_ERROR); 2235 goto err; 2236 } 2237 2238 tkey = srvr_pub_pkey->pkey.ec; 2239 } 2240 2241 srvr_group = EC_KEY_get0_group(tkey); 2242 srvr_ecpoint = EC_KEY_get0_public_key(tkey); 2243 2244 if ((srvr_group == NULL) || (srvr_ecpoint == NULL)) { 2245 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2246 ERR_R_INTERNAL_ERROR); 2247 goto err; 2248 } 2249 2250 if ((clnt_ecdh = EC_KEY_new()) == NULL) { 2251 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2252 ERR_R_MALLOC_FAILURE); 2253 goto err; 2254 } 2255 2256 if (!EC_KEY_set_group(clnt_ecdh, srvr_group)) { 2257 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB); 2258 goto err; 2259 } 2260 if (ecdh_clnt_cert) { 2261 /* 2262 * Reuse key info from our certificate We only need our 2263 * private key to perform the ECDH computation. 2264 */ 2265 const BIGNUM *priv_key; 2266 tkey = s->cert->key->privatekey->pkey.ec; 2267 priv_key = EC_KEY_get0_private_key(tkey); 2268 if (priv_key == NULL) { 2269 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2270 ERR_R_MALLOC_FAILURE); 2271 goto err; 2272 } 2273 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key)) { 2274 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB); 2275 goto err; 2276 } 2277 } else { 2278 /* Generate a new ECDH key pair */ 2279 if (!(EC_KEY_generate_key(clnt_ecdh))) { 2280 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2281 ERR_R_ECDH_LIB); 2282 goto err; 2283 } 2284 } 2285 2286 /* 2287 * use the 'p' output buffer for the ECDH key, but make sure to 2288 * clear it out afterwards 2289 */ 2290 2291 field_size = EC_GROUP_get_degree(srvr_group); 2292 if (field_size <= 0) { 2293 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB); 2294 goto err; 2295 } 2296 n = ECDH_compute_key(p, (field_size + 7) / 8, srvr_ecpoint, 2297 clnt_ecdh, NULL); 2298 if (n <= 0) { 2299 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB); 2300 goto err; 2301 } 2302 2303 /* generate master key from the result */ 2304 s->session->master_key_length = 2305 s->method->ssl3_enc->generate_master_secret(s, 2306 s-> 2307 session->master_key, 2308 p, n); 2309 2310 memset(p, 0, n); /* clean up */ 2311 2312 if (ecdh_clnt_cert) { 2313 /* Send empty client key exch message */ 2314 n = 0; 2315 } else { 2316 /* 2317 * First check the size of encoding and allocate memory 2318 * accordingly. 2319 */ 2320 encoded_pt_len = 2321 EC_POINT_point2oct(srvr_group, 2322 EC_KEY_get0_public_key(clnt_ecdh), 2323 POINT_CONVERSION_UNCOMPRESSED, 2324 NULL, 0, NULL); 2325 2326 encodedPoint = (unsigned char *) 2327 OPENSSL_malloc(encoded_pt_len * sizeof(unsigned char)); 2328 bn_ctx = BN_CTX_new(); 2329 if ((encodedPoint == NULL) || (bn_ctx == NULL)) { 2330 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2331 ERR_R_MALLOC_FAILURE); 2332 goto err; 2333 } 2334 2335 /* Encode the public key */ 2336 n = EC_POINT_point2oct(srvr_group, 2337 EC_KEY_get0_public_key(clnt_ecdh), 2338 POINT_CONVERSION_UNCOMPRESSED, 2339 encodedPoint, encoded_pt_len, bn_ctx); 2340 2341 *p = n; /* length of encoded point */ 2342 /* Encoded point will be copied here */ 2343 p += 1; 2344 /* copy the point */ 2345 memcpy((unsigned char *)p, encodedPoint, n); 2346 /* increment n to account for length field */ 2347 n += 1; 2348 } 2349 2350 /* Free allocated memory */ 2351 BN_CTX_free(bn_ctx); 2352 if (encodedPoint != NULL) 2353 OPENSSL_free(encodedPoint); 2354 if (clnt_ecdh != NULL) 2355 EC_KEY_free(clnt_ecdh); 2356 EVP_PKEY_free(srvr_pub_pkey); 2357 } 2358#endif /* !OPENSSL_NO_ECDH */ 2359 else { 2360 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); 2361 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); 2362 goto err; 2363 } 2364 2365 *(d++) = SSL3_MT_CLIENT_KEY_EXCHANGE; 2366 l2n3(n, d); 2367 2368 s->state = SSL3_ST_CW_KEY_EXCH_B; 2369 /* number of bytes to write */ 2370 s->init_num = n + 4; 2371 s->init_off = 0; 2372 } 2373 2374 /* SSL3_ST_CW_KEY_EXCH_B */ 2375 return (ssl3_do_write(s, SSL3_RT_HANDSHAKE)); 2376 err: 2377#ifndef OPENSSL_NO_ECDH 2378 BN_CTX_free(bn_ctx); 2379 if (encodedPoint != NULL) 2380 OPENSSL_free(encodedPoint); 2381 if (clnt_ecdh != NULL) 2382 EC_KEY_free(clnt_ecdh); 2383 EVP_PKEY_free(srvr_pub_pkey); 2384#endif 2385 return (-1); 2386} 2387 2388int ssl3_send_client_verify(SSL *s) 2389{ 2390 unsigned char *p, *d; 2391 unsigned char data[MD5_DIGEST_LENGTH + SHA_DIGEST_LENGTH]; 2392 EVP_PKEY *pkey; 2393#ifndef OPENSSL_NO_RSA 2394 unsigned u = 0; 2395#endif 2396 unsigned long n; 2397#if !defined(OPENSSL_NO_DSA) || !defined(OPENSSL_NO_ECDSA) 2398 int j; 2399#endif 2400 2401 if (s->state == SSL3_ST_CW_CERT_VRFY_A) { 2402 d = (unsigned char *)s->init_buf->data; 2403 p = &(d[4]); 2404 pkey = s->cert->key->privatekey; 2405 2406 s->method->ssl3_enc->cert_verify_mac(s, &(s->s3->finish_dgst2), 2407 &(data[MD5_DIGEST_LENGTH])); 2408 2409#ifndef OPENSSL_NO_RSA 2410 if (pkey->type == EVP_PKEY_RSA) { 2411 s->method->ssl3_enc->cert_verify_mac(s, 2412 &(s->s3->finish_dgst1), 2413 &(data[0])); 2414 if (RSA_sign 2415 (NID_md5_sha1, data, MD5_DIGEST_LENGTH + SHA_DIGEST_LENGTH, 2416 &(p[2]), &u, pkey->pkey.rsa) <= 0) { 2417 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_RSA_LIB); 2418 goto err; 2419 } 2420 s2n(u, p); 2421 n = u + 2; 2422 } else 2423#endif 2424#ifndef OPENSSL_NO_DSA 2425 if (pkey->type == EVP_PKEY_DSA) { 2426 if (!DSA_sign(pkey->save_type, 2427 &(data[MD5_DIGEST_LENGTH]), 2428 SHA_DIGEST_LENGTH, &(p[2]), 2429 (unsigned int *)&j, pkey->pkey.dsa)) { 2430 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_DSA_LIB); 2431 goto err; 2432 } 2433 s2n(j, p); 2434 n = j + 2; 2435 } else 2436#endif 2437#ifndef OPENSSL_NO_ECDSA 2438 if (pkey->type == EVP_PKEY_EC) { 2439 if (!ECDSA_sign(pkey->save_type, 2440 &(data[MD5_DIGEST_LENGTH]), 2441 SHA_DIGEST_LENGTH, &(p[2]), 2442 (unsigned int *)&j, pkey->pkey.ec)) { 2443 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_ECDSA_LIB); 2444 goto err; 2445 } 2446 s2n(j, p); 2447 n = j + 2; 2448 } else 2449#endif 2450 { 2451 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR); 2452 goto err; 2453 } 2454 *(d++) = SSL3_MT_CERTIFICATE_VERIFY; 2455 l2n3(n, d); 2456 2457 s->state = SSL3_ST_CW_CERT_VRFY_B; 2458 s->init_num = (int)n + 4; 2459 s->init_off = 0; 2460 } 2461 return (ssl3_do_write(s, SSL3_RT_HANDSHAKE)); 2462 err: 2463 return (-1); 2464} 2465 2466int ssl3_send_client_certificate(SSL *s) 2467{ 2468 X509 *x509 = NULL; 2469 EVP_PKEY *pkey = NULL; 2470 int i; 2471 unsigned long l; 2472 2473 if (s->state == SSL3_ST_CW_CERT_A) { 2474 if ((s->cert == NULL) || 2475 (s->cert->key->x509 == NULL) || 2476 (s->cert->key->privatekey == NULL)) 2477 s->state = SSL3_ST_CW_CERT_B; 2478 else 2479 s->state = SSL3_ST_CW_CERT_C; 2480 } 2481 2482 /* We need to get a client cert */ 2483 if (s->state == SSL3_ST_CW_CERT_B) { 2484 /* 2485 * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP; 2486 * return(-1); We then get retied later 2487 */ 2488 i = 0; 2489 i = ssl_do_client_cert_cb(s, &x509, &pkey); 2490 if (i < 0) { 2491 s->rwstate = SSL_X509_LOOKUP; 2492 return (-1); 2493 } 2494 s->rwstate = SSL_NOTHING; 2495 if ((i == 1) && (pkey != NULL) && (x509 != NULL)) { 2496 s->state = SSL3_ST_CW_CERT_B; 2497 if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey)) 2498 i = 0; 2499 } else if (i == 1) { 2500 i = 0; 2501 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE, 2502 SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); 2503 } 2504 2505 if (x509 != NULL) 2506 X509_free(x509); 2507 if (pkey != NULL) 2508 EVP_PKEY_free(pkey); 2509 if (i == 0) { 2510 if (s->version == SSL3_VERSION) { 2511 s->s3->tmp.cert_req = 0; 2512 ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE); 2513 return (1); 2514 } else { 2515 s->s3->tmp.cert_req = 2; 2516 } 2517 } 2518 2519 /* Ok, we have a cert */ 2520 s->state = SSL3_ST_CW_CERT_C; 2521 } 2522 2523 if (s->state == SSL3_ST_CW_CERT_C) { 2524 s->state = SSL3_ST_CW_CERT_D; 2525 l = ssl3_output_cert_chain(s, 2526 (s->s3->tmp.cert_req == 2527 2) ? NULL : s->cert->key->x509); 2528 s->init_num = (int)l; 2529 s->init_off = 0; 2530 } 2531 /* SSL3_ST_CW_CERT_D */ 2532 return (ssl3_do_write(s, SSL3_RT_HANDSHAKE)); 2533} 2534 2535#define has_bits(i,m) (((i)&(m)) == (m)) 2536 2537int ssl3_check_cert_and_algorithm(SSL *s) 2538{ 2539 int i, idx; 2540 long algs; 2541 EVP_PKEY *pkey = NULL; 2542 SESS_CERT *sc; 2543#ifndef OPENSSL_NO_RSA 2544 RSA *rsa; 2545#endif 2546#ifndef OPENSSL_NO_DH 2547 DH *dh; 2548#endif 2549 2550 sc = s->session->sess_cert; 2551 2552 algs = s->s3->tmp.new_cipher->algorithms; 2553 2554 /* we don't have a certificate */ 2555 if (algs & (SSL_aDH | SSL_aNULL | SSL_aKRB5)) 2556 return (1); 2557 2558 if (sc == NULL) { 2559 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR); 2560 goto err; 2561 } 2562#ifndef OPENSSL_NO_RSA 2563 rsa = s->session->sess_cert->peer_rsa_tmp; 2564#endif 2565#ifndef OPENSSL_NO_DH 2566 dh = s->session->sess_cert->peer_dh_tmp; 2567#endif 2568 2569 /* This is the passed certificate */ 2570 2571 idx = sc->peer_cert_type; 2572#ifndef OPENSSL_NO_ECDH 2573 if (idx == SSL_PKEY_ECC) { 2574 if (check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509, 2575 s->s3->tmp.new_cipher) == 0) { 2576 /* check failed */ 2577 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_BAD_ECC_CERT); 2578 goto f_err; 2579 } else { 2580 return 1; 2581 } 2582 } 2583#endif 2584 pkey = X509_get_pubkey(sc->peer_pkeys[idx].x509); 2585 i = X509_certificate_type(sc->peer_pkeys[idx].x509, pkey); 2586 EVP_PKEY_free(pkey); 2587 2588 /* Check that we have a certificate if we require one */ 2589 if ((algs & SSL_aRSA) && !has_bits(i, EVP_PK_RSA | EVP_PKT_SIGN)) { 2590 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, 2591 SSL_R_MISSING_RSA_SIGNING_CERT); 2592 goto f_err; 2593 } 2594#ifndef OPENSSL_NO_DSA 2595 else if ((algs & SSL_aDSS) && !has_bits(i, EVP_PK_DSA | EVP_PKT_SIGN)) { 2596 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, 2597 SSL_R_MISSING_DSA_SIGNING_CERT); 2598 goto f_err; 2599 } 2600#endif 2601#ifndef OPENSSL_NO_RSA 2602 if ((algs & SSL_kRSA) && 2603 !(has_bits(i, EVP_PK_RSA | EVP_PKT_ENC) || (rsa != NULL))) { 2604 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, 2605 SSL_R_MISSING_RSA_ENCRYPTING_CERT); 2606 goto f_err; 2607 } 2608#endif 2609#ifndef OPENSSL_NO_DH 2610 if ((algs & SSL_kEDH) && 2611 !(has_bits(i, EVP_PK_DH | EVP_PKT_EXCH) || (dh != NULL))) { 2612 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_MISSING_DH_KEY); 2613 goto f_err; 2614 } else if ((algs & SSL_kDHr) && !has_bits(i, EVP_PK_DH | EVP_PKS_RSA)) { 2615 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, 2616 SSL_R_MISSING_DH_RSA_CERT); 2617 goto f_err; 2618 } 2619# ifndef OPENSSL_NO_DSA 2620 else if ((algs & SSL_kDHd) && !has_bits(i, EVP_PK_DH | EVP_PKS_DSA)) { 2621 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, 2622 SSL_R_MISSING_DH_DSA_CERT); 2623 goto f_err; 2624 } 2625# endif 2626#endif 2627 2628 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i, EVP_PKT_EXP)) { 2629#ifndef OPENSSL_NO_RSA 2630 if (algs & SSL_kRSA) { 2631 if (rsa == NULL 2632 || RSA_size(rsa) * 8 > 2633 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) { 2634 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, 2635 SSL_R_MISSING_EXPORT_TMP_RSA_KEY); 2636 goto f_err; 2637 } 2638 } else 2639#endif 2640#ifndef OPENSSL_NO_DH 2641 if (algs & (SSL_kEDH | SSL_kDHr | SSL_kDHd)) { 2642 if (dh == NULL 2643 || DH_size(dh) * 8 > 2644 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) { 2645 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, 2646 SSL_R_MISSING_EXPORT_TMP_DH_KEY); 2647 goto f_err; 2648 } 2649 } else 2650#endif 2651 { 2652 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, 2653 SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE); 2654 goto f_err; 2655 } 2656 } 2657 return (1); 2658 f_err: 2659 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); 2660 err: 2661 return (0); 2662} 2663 2664#ifndef OPENSSL_NO_ECDH 2665/* This is the complement of nid2curve_id in s3_srvr.c. */ 2666static int curve_id2nid(int curve_id) 2667{ 2668 /* 2669 * ECC curves from draft-ietf-tls-ecc-01.txt (Mar 15, 2001) (no changes 2670 * in draft-ietf-tls-ecc-03.txt [June 2003]) 2671 */ 2672 static int nid_list[26] = { 2673 0, 2674 NID_sect163k1, /* sect163k1 (1) */ 2675 NID_sect163r1, /* sect163r1 (2) */ 2676 NID_sect163r2, /* sect163r2 (3) */ 2677 NID_sect193r1, /* sect193r1 (4) */ 2678 NID_sect193r2, /* sect193r2 (5) */ 2679 NID_sect233k1, /* sect233k1 (6) */ 2680 NID_sect233r1, /* sect233r1 (7) */ 2681 NID_sect239k1, /* sect239k1 (8) */ 2682 NID_sect283k1, /* sect283k1 (9) */ 2683 NID_sect283r1, /* sect283r1 (10) */ 2684 NID_sect409k1, /* sect409k1 (11) */ 2685 NID_sect409r1, /* sect409r1 (12) */ 2686 NID_sect571k1, /* sect571k1 (13) */ 2687 NID_sect571r1, /* sect571r1 (14) */ 2688 NID_secp160k1, /* secp160k1 (15) */ 2689 NID_secp160r1, /* secp160r1 (16) */ 2690 NID_secp160r2, /* secp160r2 (17) */ 2691 NID_secp192k1, /* secp192k1 (18) */ 2692 NID_X9_62_prime192v1, /* secp192r1 (19) */ 2693 NID_secp224k1, /* secp224k1 (20) */ 2694 NID_secp224r1, /* secp224r1 (21) */ 2695 NID_secp256k1, /* secp256k1 (22) */ 2696 NID_X9_62_prime256v1, /* secp256r1 (23) */ 2697 NID_secp384r1, /* secp384r1 (24) */ 2698 NID_secp521r1 /* secp521r1 (25) */ 2699 }; 2700 2701 if ((curve_id < 1) || (curve_id > 25)) 2702 return 0; 2703 2704 return nid_list[curve_id]; 2705} 2706#endif 2707 2708/* 2709 * Check to see if handshake is full or resumed. Usually this is just a case 2710 * of checking to see if a cache hit has occurred. In the case of session 2711 * tickets we have to check the next message to be sure. 2712 */ 2713 2714#ifndef OPENSSL_NO_TLSEXT 2715int ssl3_check_finished(SSL *s) 2716{ 2717 int ok; 2718 long n; 2719 /* 2720 * If we have no ticket or session ID is non-zero length (a match of a 2721 * non-zero session length would never reach here) it cannot be a resumed 2722 * session. 2723 */ 2724 if (!s->session->tlsext_tick || s->session->session_id_length) 2725 return 1; 2726 /* 2727 * this function is called when we really expect a Certificate message, 2728 * so permit appropriate message length 2729 */ 2730 n = s->method->ssl_get_message(s, 2731 SSL3_ST_CR_CERT_A, 2732 SSL3_ST_CR_CERT_B, 2733 -1, s->max_cert_list, &ok); 2734 if (!ok) 2735 return ((int)n); 2736 s->s3->tmp.reuse_message = 1; 2737 if ((s->s3->tmp.message_type == SSL3_MT_FINISHED) 2738 || (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET)) 2739 return 2; 2740 2741 return 1; 2742} 2743#endif 2744 2745int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey) 2746{ 2747 int i = 0; 2748#ifndef OPENSSL_NO_ENGINE 2749 if (s->ctx->client_cert_engine) { 2750 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s, 2751 SSL_get_client_CA_list(s), 2752 px509, ppkey, NULL, NULL, NULL); 2753 if (i != 0) 2754 return i; 2755 } 2756#endif 2757 if (s->ctx->client_cert_cb) 2758 i = s->ctx->client_cert_cb(s, px509, ppkey); 2759 return i; 2760} 2761