s3_clnt.c revision 306230
118870Swollman/* ssl/s3_clnt.c */ 218870Swollman/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 318870Swollman * All rights reserved. 418870Swollman * 518870Swollman * This package is an SSL implementation written 618870Swollman * by Eric Young (eay@cryptsoft.com). 718870Swollman * The implementation was written so as to conform with Netscapes SSL. 818870Swollman * 918870Swollman * This library is free for commercial and non-commercial use as long as 1018870Swollman * the following conditions are aheared to. The following conditions 1118870Swollman * apply to all code found in this distribution, be it the RC4, RSA, 1218870Swollman * lhash, DES, etc., code; not just the SSL code. The SSL documentation 1318870Swollman * included with this distribution is covered by the same copyright terms 1418870Swollman * except that the holder is Tim Hudson (tjh@cryptsoft.com). 1518870Swollman * 1618870Swollman * Copyright remains Eric Young's, and as such any Copyright notices in 1718870Swollman * the code are not to be removed. 1818870Swollman * If this package is used in a product, Eric Young should be given attribution 1918870Swollman * as the author of the parts of the library used. 2018870Swollman * This can be in the form of a textual message at program startup or 2118870Swollman * in documentation (online or textual) provided with the package. 2218870Swollman * 2318870Swollman * Redistribution and use in source and binary forms, with or without 2418870Swollman * modification, are permitted provided that the following conditions 2518870Swollman * are met: 2618870Swollman * 1. Redistributions of source code must retain the copyright 2718870Swollman * notice, this list of conditions and the following disclaimer. 2818870Swollman * 2. Redistributions in binary form must reproduce the above copyright 2918870Swollman * notice, this list of conditions and the following disclaimer in the 3018870Swollman * documentation and/or other materials provided with the distribution. 3118870Swollman * 3. All advertising materials mentioning features or use of this software 3218870Swollman * must display the following acknowledgement: 3318870Swollman * "This product includes cryptographic software written by 3418870Swollman * Eric Young (eay@cryptsoft.com)" 3518870Swollman * The word 'cryptographic' can be left out if the rouines from the library 3618870Swollman * being used are not cryptographic related :-). 3718870Swollman * 4. If you include any Windows specific code (or a derivative thereof) from 3818870Swollman * the apps directory (application code) you must include an acknowledgement: 3918870Swollman * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 4018870Swollman * 4118870Swollman * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 4218870Swollman * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 4318870Swollman * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 4418870Swollman * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 4518870Swollman * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 4618870Swollman * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 4718870Swollman * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 4818870Swollman * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 4918870Swollman * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 5018870Swollman * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 5118870Swollman * SUCH DAMAGE. 5218870Swollman * 5318870Swollman * The licence and distribution terms for any publically available version or 5418870Swollman * derivative of this code cannot be changed. i.e. this code cannot simply be 5518870Swollman * copied and put under another distribution licence 5618870Swollman * [including the GNU Public Licence.] 5718870Swollman */ 5818870Swollman/* ==================================================================== 5918870Swollman * Copyright (c) 1998-2003 The OpenSSL Project. All rights reserved. 6018870Swollman * 6118870Swollman * Redistribution and use in source and binary forms, with or without 6218870Swollman * modification, are permitted provided that the following conditions 6318870Swollman * are met: 6418870Swollman * 6518870Swollman * 1. Redistributions of source code must retain the above copyright 6618870Swollman * notice, this list of conditions and the following disclaimer. 6718870Swollman * 6818870Swollman * 2. Redistributions in binary form must reproduce the above copyright 6918870Swollman * notice, this list of conditions and the following disclaimer in 7018870Swollman * the documentation and/or other materials provided with the 7118870Swollman * distribution. 7218870Swollman * 7318870Swollman * 3. All advertising materials mentioning features or use of this 7418870Swollman * software must display the following acknowledgment: 7518870Swollman * "This product includes software developed by the OpenSSL Project 7618870Swollman * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" 7718870Swollman * 7818870Swollman * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 7918870Swollman * endorse or promote products derived from this software without 8018870Swollman * prior written permission. For written permission, please contact 8118870Swollman * openssl-core@openssl.org. 8218870Swollman * 8318870Swollman * 5. Products derived from this software may not be called "OpenSSL" 8418870Swollman * nor may "OpenSSL" appear in their names without prior written 8518870Swollman * permission of the OpenSSL Project. 8618870Swollman * 8718870Swollman * 6. Redistributions of any form whatsoever must retain the following 8818870Swollman * acknowledgment: 8918870Swollman * "This product includes software developed by the OpenSSL Project 9018870Swollman * for use in the OpenSSL Toolkit (http://www.openssl.org/)" 9118870Swollman * 9218870Swollman * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 9318870Swollman * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 9418870Swollman * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 9518870Swollman * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 9618870Swollman * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 9718870Swollman * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 9818870Swollman * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 9918870Swollman * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 10018870Swollman * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 10118870Swollman * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 10218870Swollman * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 10318870Swollman * OF THE POSSIBILITY OF SUCH DAMAGE. 10418870Swollman * ==================================================================== 10518870Swollman * 10618870Swollman * This product includes cryptographic software written by Eric Young 10718870Swollman * (eay@cryptsoft.com). This product includes software written by Tim 10818870Swollman * Hudson (tjh@cryptsoft.com). 10918870Swollman * 11018870Swollman */ 11118870Swollman/* ==================================================================== 11218870Swollman * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. 11318870Swollman * 11418870Swollman * Portions of the attached software ("Contribution") are developed by 11518870Swollman * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project. 11618870Swollman * 11718870Swollman * The Contribution is licensed pursuant to the OpenSSL open source 11818870Swollman * license provided above. 11918870Swollman * 12018870Swollman * ECC cipher suite support in OpenSSL originally written by 12118870Swollman * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories. 12218870Swollman * 12318870Swollman */ 12418870Swollman 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 if (nc + 3 > llen) { 935 al = SSL_AD_DECODE_ERROR; 936 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 937 SSL_R_CERT_LENGTH_MISMATCH); 938 goto f_err; 939 } 940 n2l3(p, l); 941 if ((l + nc + 3) > llen) { 942 al = SSL_AD_DECODE_ERROR; 943 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 944 SSL_R_CERT_LENGTH_MISMATCH); 945 goto f_err; 946 } 947 948 q = p; 949 x = d2i_X509(NULL, &q, l); 950 if (x == NULL) { 951 al = SSL_AD_BAD_CERTIFICATE; 952 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, ERR_R_ASN1_LIB); 953 goto f_err; 954 } 955 if (q != (p + l)) { 956 al = SSL_AD_DECODE_ERROR; 957 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 958 SSL_R_CERT_LENGTH_MISMATCH); 959 goto f_err; 960 } 961 if (!sk_X509_push(sk, x)) { 962 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); 963 goto err; 964 } 965 x = NULL; 966 nc += l + 3; 967 p = q; 968 } 969 970 i = ssl_verify_cert_chain(s, sk); 971 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0) 972#ifndef OPENSSL_NO_KRB5 973 && (s->s3->tmp. 974 new_cipher->algorithms & (SSL_MKEY_MASK | SSL_AUTH_MASK)) 975 != (SSL_aKRB5 | SSL_kKRB5) 976#endif /* OPENSSL_NO_KRB5 */ 977 ) { 978 al = ssl_verify_alarm_type(s->verify_result); 979 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 980 SSL_R_CERTIFICATE_VERIFY_FAILED); 981 goto f_err; 982 } 983 ERR_clear_error(); /* but we keep s->verify_result */ 984 985 sc = ssl_sess_cert_new(); 986 if (sc == NULL) 987 goto err; 988 989 if (s->session->sess_cert) 990 ssl_sess_cert_free(s->session->sess_cert); 991 s->session->sess_cert = sc; 992 993 sc->cert_chain = sk; 994 /* 995 * Inconsistency alert: cert_chain does include the peer's certificate, 996 * which we don't include in s3_srvr.c 997 */ 998 x = sk_X509_value(sk, 0); 999 sk = NULL; 1000 /* 1001 * VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end 1002 */ 1003 1004 pkey = X509_get_pubkey(x); 1005 1006 /* VRS: allow null cert if auth == KRB5 */ 1007 need_cert = ((s->s3->tmp.new_cipher->algorithms 1008 & (SSL_MKEY_MASK | SSL_AUTH_MASK)) 1009 == (SSL_aKRB5 | SSL_kKRB5)) ? 0 : 1; 1010 1011#ifdef KSSL_DEBUG 1012 printf("pkey,x = %p, %p\n", (void *)pkey, (void *)x); 1013 printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x, pkey)); 1014 printf("cipher, alg, nc = %s, %lx, %d\n", s->s3->tmp.new_cipher->name, 1015 s->s3->tmp.new_cipher->algorithms, need_cert); 1016#endif /* KSSL_DEBUG */ 1017 1018 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey))) { 1019 x = NULL; 1020 al = SSL3_AL_FATAL; 1021 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 1022 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); 1023 goto f_err; 1024 } 1025 1026 i = ssl_cert_type(x, pkey); 1027 if (need_cert && i < 0) { 1028 x = NULL; 1029 al = SSL3_AL_FATAL; 1030 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 1031 SSL_R_UNKNOWN_CERTIFICATE_TYPE); 1032 goto f_err; 1033 } 1034 1035 if (need_cert) { 1036 sc->peer_cert_type = i; 1037 CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509); 1038 /* 1039 * Why would the following ever happen? We just created sc a couple 1040 * of lines ago. 1041 */ 1042 if (sc->peer_pkeys[i].x509 != NULL) 1043 X509_free(sc->peer_pkeys[i].x509); 1044 sc->peer_pkeys[i].x509 = x; 1045 sc->peer_key = &(sc->peer_pkeys[i]); 1046 1047 if (s->session->peer != NULL) 1048 X509_free(s->session->peer); 1049 CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509); 1050 s->session->peer = x; 1051 } else { 1052 sc->peer_cert_type = i; 1053 sc->peer_key = NULL; 1054 1055 if (s->session->peer != NULL) 1056 X509_free(s->session->peer); 1057 s->session->peer = NULL; 1058 } 1059 s->session->verify_result = s->verify_result; 1060 1061 x = NULL; 1062 ret = 1; 1063 1064 if (0) { 1065 f_err: 1066 ssl3_send_alert(s, SSL3_AL_FATAL, al); 1067 } 1068 err: 1069 EVP_PKEY_free(pkey); 1070 X509_free(x); 1071 sk_X509_pop_free(sk, X509_free); 1072 return (ret); 1073} 1074 1075int ssl3_get_key_exchange(SSL *s) 1076{ 1077#ifndef OPENSSL_NO_RSA 1078 unsigned char *q, md_buf[EVP_MAX_MD_SIZE * 2]; 1079#endif 1080 EVP_MD_CTX md_ctx; 1081 unsigned char *param, *p; 1082 int al, j, ok; 1083 long i, param_len, n, alg; 1084 EVP_PKEY *pkey = NULL; 1085#ifndef OPENSSL_NO_RSA 1086 RSA *rsa = NULL; 1087#endif 1088#ifndef OPENSSL_NO_DH 1089 DH *dh = NULL; 1090#endif 1091#ifndef OPENSSL_NO_ECDH 1092 EC_KEY *ecdh = NULL; 1093 BN_CTX *bn_ctx = NULL; 1094 EC_POINT *srvr_ecpoint = NULL; 1095 int curve_nid = 0; 1096 int encoded_pt_len = 0; 1097#endif 1098 1099 /* 1100 * use same message size as in ssl3_get_certificate_request() as 1101 * ServerKeyExchange message may be skipped 1102 */ 1103 n = s->method->ssl_get_message(s, 1104 SSL3_ST_CR_KEY_EXCH_A, 1105 SSL3_ST_CR_KEY_EXCH_B, 1106 -1, s->max_cert_list, &ok); 1107 1108 if (!ok) 1109 return ((int)n); 1110 1111 alg = s->s3->tmp.new_cipher->algorithms; 1112 EVP_MD_CTX_init(&md_ctx); 1113 1114 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE) { 1115 /* 1116 * Can't skip server key exchange if this is an ephemeral 1117 * ciphersuite. 1118 */ 1119 if (alg & (SSL_kEDH | SSL_kECDHE)) { 1120 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); 1121 al = SSL_AD_UNEXPECTED_MESSAGE; 1122 goto f_err; 1123 } 1124 s->s3->tmp.reuse_message = 1; 1125 return (1); 1126 } 1127 1128 param = p = (unsigned char *)s->init_msg; 1129 1130 if (s->session->sess_cert != NULL) { 1131#ifndef OPENSSL_NO_RSA 1132 if (s->session->sess_cert->peer_rsa_tmp != NULL) { 1133 RSA_free(s->session->sess_cert->peer_rsa_tmp); 1134 s->session->sess_cert->peer_rsa_tmp = NULL; 1135 } 1136#endif 1137#ifndef OPENSSL_NO_DH 1138 if (s->session->sess_cert->peer_dh_tmp) { 1139 DH_free(s->session->sess_cert->peer_dh_tmp); 1140 s->session->sess_cert->peer_dh_tmp = NULL; 1141 } 1142#endif 1143#ifndef OPENSSL_NO_ECDH 1144 if (s->session->sess_cert->peer_ecdh_tmp) { 1145 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp); 1146 s->session->sess_cert->peer_ecdh_tmp = NULL; 1147 } 1148#endif 1149 } else { 1150 s->session->sess_cert = ssl_sess_cert_new(); 1151 } 1152 1153 /* Total length of the parameters including the length prefix */ 1154 param_len = 0; 1155 1156 al = SSL_AD_DECODE_ERROR; 1157#ifndef OPENSSL_NO_RSA 1158 if (alg & SSL_kRSA) { 1159 /* Temporary RSA keys only allowed in export ciphersuites */ 1160 if (!SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)) { 1161 al = SSL_AD_UNEXPECTED_MESSAGE; 1162 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); 1163 goto f_err; 1164 } 1165 if ((rsa = RSA_new()) == NULL) { 1166 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); 1167 goto err; 1168 } 1169 1170 param_len = 2; 1171 if (param_len > n) { 1172 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); 1173 goto f_err; 1174 } 1175 n2s(p, i); 1176 1177 if (i > n - param_len) { 1178 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_RSA_MODULUS_LENGTH); 1179 goto f_err; 1180 } 1181 param_len += i; 1182 1183 if (!(rsa->n = BN_bin2bn(p, i, rsa->n))) { 1184 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); 1185 goto err; 1186 } 1187 p += i; 1188 1189 if (2 > n - param_len) { 1190 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); 1191 goto f_err; 1192 } 1193 param_len += 2; 1194 1195 n2s(p, i); 1196 1197 if (i > n - param_len) { 1198 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_RSA_E_LENGTH); 1199 goto f_err; 1200 } 1201 param_len += i; 1202 1203 if (!(rsa->e = BN_bin2bn(p, i, rsa->e))) { 1204 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); 1205 goto err; 1206 } 1207 p += i; 1208 n -= param_len; 1209 1210 /* this should be because we are using an export cipher */ 1211 if (alg & SSL_aRSA) 1212 pkey = 1213 X509_get_pubkey(s->session-> 1214 sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1215 else { 1216 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); 1217 goto err; 1218 } 1219 s->session->sess_cert->peer_rsa_tmp = rsa; 1220 rsa = NULL; 1221 } 1222#else /* OPENSSL_NO_RSA */ 1223 if (0) ; 1224#endif 1225#ifndef OPENSSL_NO_DH 1226 else if (alg & SSL_kEDH) { 1227 if ((dh = DH_new()) == NULL) { 1228 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_DH_LIB); 1229 goto err; 1230 } 1231 1232 param_len = 2; 1233 if (param_len > n) { 1234 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); 1235 goto f_err; 1236 } 1237 n2s(p, i); 1238 1239 if (i > n - param_len) { 1240 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_DH_P_LENGTH); 1241 goto f_err; 1242 } 1243 param_len += i; 1244 1245 if (!(dh->p = BN_bin2bn(p, i, NULL))) { 1246 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); 1247 goto err; 1248 } 1249 p += i; 1250 1251 if (2 > n - param_len) { 1252 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); 1253 goto f_err; 1254 } 1255 param_len += 2; 1256 1257 n2s(p, i); 1258 1259 if (i > n - param_len) { 1260 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_DH_G_LENGTH); 1261 goto f_err; 1262 } 1263 param_len += i; 1264 1265 if (!(dh->g = BN_bin2bn(p, i, NULL))) { 1266 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); 1267 goto err; 1268 } 1269 p += i; 1270 1271 if (2 > n - param_len) { 1272 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); 1273 goto f_err; 1274 } 1275 param_len += 2; 1276 1277 n2s(p, i); 1278 1279 if (i > n - param_len) { 1280 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_DH_PUB_KEY_LENGTH); 1281 goto f_err; 1282 } 1283 param_len += i; 1284 1285 if (!(dh->pub_key = BN_bin2bn(p, i, NULL))) { 1286 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); 1287 goto err; 1288 } 1289 p += i; 1290 n -= param_len; 1291 1292# ifndef OPENSSL_NO_RSA 1293 if (alg & SSL_aRSA) 1294 pkey = 1295 X509_get_pubkey(s->session-> 1296 sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1297# else 1298 if (0) ; 1299# endif 1300# ifndef OPENSSL_NO_DSA 1301 else if (alg & SSL_aDSS) 1302 pkey = 1303 X509_get_pubkey(s->session-> 1304 sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN]. 1305 x509); 1306# endif 1307 /* else anonymous DH, so no certificate or pkey. */ 1308 1309 s->session->sess_cert->peer_dh_tmp = dh; 1310 dh = NULL; 1311 } else if ((alg & SSL_kDHr) || (alg & SSL_kDHd)) { 1312 al = SSL_AD_ILLEGAL_PARAMETER; 1313 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1314 SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER); 1315 goto f_err; 1316 } 1317#endif /* !OPENSSL_NO_DH */ 1318 1319#ifndef OPENSSL_NO_ECDH 1320 else if (alg & SSL_kECDHE) { 1321 EC_GROUP *ngroup; 1322 const EC_GROUP *group; 1323 1324 if ((ecdh = EC_KEY_new()) == NULL) { 1325 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); 1326 goto err; 1327 } 1328 1329 /* 1330 * Extract elliptic curve parameters and the server's ephemeral ECDH 1331 * public key. Keep accumulating lengths of various components in 1332 * param_len and make sure it never exceeds n. 1333 */ 1334 1335 /* 1336 * XXX: For now we only support named (not generic) curves and the 1337 * ECParameters in this case is just three bytes. We also need one 1338 * byte for the length of the encoded point 1339 */ 1340 param_len = 4; 1341 if (param_len > n) { 1342 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); 1343 goto f_err; 1344 } 1345 1346 if ((*p != NAMED_CURVE_TYPE) || 1347 ((curve_nid = curve_id2nid(*(p + 2))) == 0)) { 1348 al = SSL_AD_INTERNAL_ERROR; 1349 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1350 SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); 1351 goto f_err; 1352 } 1353 1354 ngroup = EC_GROUP_new_by_curve_name(curve_nid); 1355 if (ngroup == NULL) { 1356 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_EC_LIB); 1357 goto err; 1358 } 1359 if (EC_KEY_set_group(ecdh, ngroup) == 0) { 1360 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_EC_LIB); 1361 goto err; 1362 } 1363 EC_GROUP_free(ngroup); 1364 1365 group = EC_KEY_get0_group(ecdh); 1366 1367 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && 1368 (EC_GROUP_get_degree(group) > 163)) { 1369 al = SSL_AD_EXPORT_RESTRICTION; 1370 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1371 SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER); 1372 goto f_err; 1373 } 1374 1375 p += 3; 1376 1377 /* Next, get the encoded ECPoint */ 1378 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) || 1379 ((bn_ctx = BN_CTX_new()) == NULL)) { 1380 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); 1381 goto err; 1382 } 1383 1384 encoded_pt_len = *p; /* length of encoded point */ 1385 p += 1; 1386 1387 if ((encoded_pt_len > n - param_len) || 1388 (EC_POINT_oct2point(group, srvr_ecpoint, 1389 p, encoded_pt_len, bn_ctx) == 0)) { 1390 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_ECPOINT); 1391 goto f_err; 1392 } 1393 param_len += encoded_pt_len; 1394 1395 n -= param_len; 1396 p += encoded_pt_len; 1397 1398 /* 1399 * The ECC/TLS specification does not mention the use of DSA to sign 1400 * ECParameters in the server key exchange message. We do support RSA 1401 * and ECDSA. 1402 */ 1403 if (0) ; 1404# ifndef OPENSSL_NO_RSA 1405 else if (alg & SSL_aRSA) 1406 pkey = 1407 X509_get_pubkey(s->session-> 1408 sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1409# endif 1410# ifndef OPENSSL_NO_ECDSA 1411 else if (alg & SSL_aECDSA) 1412 pkey = 1413 X509_get_pubkey(s->session-> 1414 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509); 1415# endif 1416 /* else anonymous ECDH, so no certificate or pkey. */ 1417 EC_KEY_set_public_key(ecdh, srvr_ecpoint); 1418 s->session->sess_cert->peer_ecdh_tmp = ecdh; 1419 ecdh = NULL; 1420 BN_CTX_free(bn_ctx); 1421 bn_ctx = NULL; 1422 EC_POINT_free(srvr_ecpoint); 1423 srvr_ecpoint = NULL; 1424 } else if (alg & SSL_kECDH) { 1425 al = SSL_AD_UNEXPECTED_MESSAGE; 1426 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); 1427 goto f_err; 1428 } 1429#endif /* !OPENSSL_NO_ECDH */ 1430 if (alg & SSL_aFZA) { 1431 al = SSL_AD_HANDSHAKE_FAILURE; 1432 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1433 SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER); 1434 goto f_err; 1435 } 1436 1437 /* p points to the next byte, there are 'n' bytes left */ 1438 1439 /* if it was signed, check the signature */ 1440 if (pkey != NULL) { 1441 n2s(p, i); 1442 n -= 2; 1443 j = EVP_PKEY_size(pkey); 1444 1445 /* 1446 * Check signature length. If n is 0 then signature is empty 1447 */ 1448 if ((i != n) || (n > j) || (n <= 0)) { 1449 /* wrong packet length */ 1450 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_WRONG_SIGNATURE_LENGTH); 1451 goto f_err; 1452 } 1453#ifndef OPENSSL_NO_RSA 1454 if (pkey->type == EVP_PKEY_RSA) { 1455 int num; 1456 unsigned int size; 1457 1458 j = 0; 1459 q = md_buf; 1460 for (num = 2; num > 0; num--) { 1461 EVP_MD_CTX_set_flags(&md_ctx, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW); 1462 EVP_DigestInit_ex(&md_ctx, (num == 2) 1463 ? s->ctx->md5 : s->ctx->sha1, NULL); 1464 EVP_DigestUpdate(&md_ctx, &(s->s3->client_random[0]), 1465 SSL3_RANDOM_SIZE); 1466 EVP_DigestUpdate(&md_ctx, &(s->s3->server_random[0]), 1467 SSL3_RANDOM_SIZE); 1468 EVP_DigestUpdate(&md_ctx, param, param_len); 1469 EVP_DigestFinal_ex(&md_ctx, q, &size); 1470 q += size; 1471 j += size; 1472 } 1473 i = RSA_verify(NID_md5_sha1, md_buf, j, p, n, pkey->pkey.rsa); 1474 if (i < 0) { 1475 al = SSL_AD_DECRYPT_ERROR; 1476 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_RSA_DECRYPT); 1477 goto f_err; 1478 } 1479 if (i == 0) { 1480 /* bad signature */ 1481 al = SSL_AD_DECRYPT_ERROR; 1482 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE); 1483 goto f_err; 1484 } 1485 } else 1486#endif 1487#ifndef OPENSSL_NO_DSA 1488 if (pkey->type == EVP_PKEY_DSA) { 1489 /* lets do DSS */ 1490 EVP_VerifyInit_ex(&md_ctx, EVP_dss1(), NULL); 1491 EVP_VerifyUpdate(&md_ctx, &(s->s3->client_random[0]), 1492 SSL3_RANDOM_SIZE); 1493 EVP_VerifyUpdate(&md_ctx, &(s->s3->server_random[0]), 1494 SSL3_RANDOM_SIZE); 1495 EVP_VerifyUpdate(&md_ctx, param, param_len); 1496 if (EVP_VerifyFinal(&md_ctx, p, (int)n, pkey) <= 0) { 1497 /* bad signature */ 1498 al = SSL_AD_DECRYPT_ERROR; 1499 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE); 1500 goto f_err; 1501 } 1502 } else 1503#endif 1504#ifndef OPENSSL_NO_ECDSA 1505 if (pkey->type == EVP_PKEY_EC) { 1506 /* let's do ECDSA */ 1507 EVP_VerifyInit_ex(&md_ctx, EVP_ecdsa(), NULL); 1508 EVP_VerifyUpdate(&md_ctx, &(s->s3->client_random[0]), 1509 SSL3_RANDOM_SIZE); 1510 EVP_VerifyUpdate(&md_ctx, &(s->s3->server_random[0]), 1511 SSL3_RANDOM_SIZE); 1512 EVP_VerifyUpdate(&md_ctx, param, param_len); 1513 if (EVP_VerifyFinal(&md_ctx, p, (int)n, pkey) <= 0) { 1514 /* bad signature */ 1515 al = SSL_AD_DECRYPT_ERROR; 1516 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE); 1517 goto f_err; 1518 } 1519 } else 1520#endif 1521 { 1522 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); 1523 goto err; 1524 } 1525 } else { 1526 /* still data left over */ 1527 if (!(alg & SSL_aNULL)) { 1528 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); 1529 goto err; 1530 } 1531 if (n != 0) { 1532 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_EXTRA_DATA_IN_MESSAGE); 1533 goto f_err; 1534 } 1535 } 1536 EVP_PKEY_free(pkey); 1537 EVP_MD_CTX_cleanup(&md_ctx); 1538 return (1); 1539 f_err: 1540 ssl3_send_alert(s, SSL3_AL_FATAL, al); 1541 err: 1542 EVP_PKEY_free(pkey); 1543#ifndef OPENSSL_NO_RSA 1544 if (rsa != NULL) 1545 RSA_free(rsa); 1546#endif 1547#ifndef OPENSSL_NO_DH 1548 if (dh != NULL) 1549 DH_free(dh); 1550#endif 1551#ifndef OPENSSL_NO_ECDH 1552 BN_CTX_free(bn_ctx); 1553 EC_POINT_free(srvr_ecpoint); 1554 if (ecdh != NULL) 1555 EC_KEY_free(ecdh); 1556#endif 1557 EVP_MD_CTX_cleanup(&md_ctx); 1558 return (-1); 1559} 1560 1561int ssl3_get_certificate_request(SSL *s) 1562{ 1563 int ok, ret = 0; 1564 unsigned long n, nc, l; 1565 unsigned int llen, ctype_num, i; 1566 X509_NAME *xn = NULL; 1567 const unsigned char *p, *q; 1568 unsigned char *d; 1569 STACK_OF(X509_NAME) *ca_sk = NULL; 1570 1571 n = s->method->ssl_get_message(s, 1572 SSL3_ST_CR_CERT_REQ_A, 1573 SSL3_ST_CR_CERT_REQ_B, 1574 -1, s->max_cert_list, &ok); 1575 1576 if (!ok) 1577 return ((int)n); 1578 1579 s->s3->tmp.cert_req = 0; 1580 1581 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE) { 1582 s->s3->tmp.reuse_message = 1; 1583 return (1); 1584 } 1585 1586 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST) { 1587 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE); 1588 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, SSL_R_WRONG_MESSAGE_TYPE); 1589 goto err; 1590 } 1591 1592 /* TLS does not like anon-DH with client cert */ 1593 if (s->version > SSL3_VERSION) { 1594 l = s->s3->tmp.new_cipher->algorithms; 1595 if (l & SSL_aNULL) { 1596 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE); 1597 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, 1598 SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER); 1599 goto err; 1600 } 1601 } 1602 1603 p = d = (unsigned char *)s->init_msg; 1604 1605 if ((ca_sk = sk_X509_NAME_new(ca_dn_cmp)) == NULL) { 1606 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); 1607 goto err; 1608 } 1609 1610 /* get the certificate types */ 1611 ctype_num = *(p++); 1612 if (ctype_num > SSL3_CT_NUMBER) 1613 ctype_num = SSL3_CT_NUMBER; 1614 for (i = 0; i < ctype_num; i++) 1615 s->s3->tmp.ctype[i] = p[i]; 1616 p += ctype_num; 1617 1618 /* get the CA RDNs */ 1619 n2s(p, llen); 1620#if 0 1621 { 1622 FILE *out; 1623 out = fopen("/tmp/vsign.der", "w"); 1624 fwrite(p, 1, llen, out); 1625 fclose(out); 1626 } 1627#endif 1628 1629 if ((llen + ctype_num + 2 + 1) != n) { 1630 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); 1631 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH); 1632 goto err; 1633 } 1634 1635 for (nc = 0; nc < llen;) { 1636 if (nc + 2 > llen) { 1637 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); 1638 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, SSL_R_CA_DN_TOO_LONG); 1639 goto err; 1640 } 1641 n2s(p, l); 1642 if ((l + nc + 2) > llen) { 1643 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG)) 1644 goto cont; /* netscape bugs */ 1645 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); 1646 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, SSL_R_CA_DN_TOO_LONG); 1647 goto err; 1648 } 1649 1650 q = p; 1651 1652 if ((xn = d2i_X509_NAME(NULL, &q, l)) == NULL) { 1653 /* If netscape tolerance is on, ignore errors */ 1654 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG) 1655 goto cont; 1656 else { 1657 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); 1658 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_ASN1_LIB); 1659 goto err; 1660 } 1661 } 1662 1663 if (q != (p + l)) { 1664 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); 1665 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, 1666 SSL_R_CA_DN_LENGTH_MISMATCH); 1667 goto err; 1668 } 1669 if (!sk_X509_NAME_push(ca_sk, xn)) { 1670 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); 1671 goto err; 1672 } 1673 1674 p += l; 1675 nc += l + 2; 1676 } 1677 1678 if (0) { 1679 cont: 1680 ERR_clear_error(); 1681 } 1682 1683 /* we should setup a certificate to return.... */ 1684 s->s3->tmp.cert_req = 1; 1685 s->s3->tmp.ctype_num = ctype_num; 1686 if (s->s3->tmp.ca_names != NULL) 1687 sk_X509_NAME_pop_free(s->s3->tmp.ca_names, X509_NAME_free); 1688 s->s3->tmp.ca_names = ca_sk; 1689 ca_sk = NULL; 1690 1691 ret = 1; 1692 err: 1693 if (ca_sk != NULL) 1694 sk_X509_NAME_pop_free(ca_sk, X509_NAME_free); 1695 return (ret); 1696} 1697 1698static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b) 1699{ 1700 return (X509_NAME_cmp(*a, *b)); 1701} 1702 1703#ifndef OPENSSL_NO_TLSEXT 1704int ssl3_get_new_session_ticket(SSL *s) 1705{ 1706 int ok, al, ret = 0, ticklen; 1707 long n; 1708 const unsigned char *p; 1709 unsigned char *d; 1710 1711 n = s->method->ssl_get_message(s, 1712 SSL3_ST_CR_SESSION_TICKET_A, 1713 SSL3_ST_CR_SESSION_TICKET_B, 1714 -1, 16384, &ok); 1715 1716 if (!ok) 1717 return ((int)n); 1718 1719 if (s->s3->tmp.message_type == SSL3_MT_FINISHED) { 1720 s->s3->tmp.reuse_message = 1; 1721 return (1); 1722 } 1723 if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET) { 1724 al = SSL_AD_UNEXPECTED_MESSAGE; 1725 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, SSL_R_BAD_MESSAGE_TYPE); 1726 goto f_err; 1727 } 1728 if (n < 6) { 1729 /* need at least ticket_lifetime_hint + ticket length */ 1730 al = SSL_AD_DECODE_ERROR; 1731 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); 1732 goto f_err; 1733 } 1734 1735 p = d = (unsigned char *)s->init_msg; 1736 1737 if (s->session->session_id_length > 0) { 1738 int i = s->session_ctx->session_cache_mode; 1739 SSL_SESSION *new_sess; 1740 /* 1741 * We reused an existing session, so we need to replace it with a new 1742 * one 1743 */ 1744 if (i & SSL_SESS_CACHE_CLIENT) { 1745 /* 1746 * Remove the old session from the cache 1747 */ 1748 if (i & SSL_SESS_CACHE_NO_INTERNAL_STORE) { 1749 if (s->session_ctx->remove_session_cb != NULL) 1750 s->session_ctx->remove_session_cb(s->session_ctx, 1751 s->session); 1752 } else { 1753 /* We carry on if this fails */ 1754 SSL_CTX_remove_session(s->session_ctx, s->session); 1755 } 1756 } 1757 1758 if ((new_sess = ssl_session_dup(s->session, 0)) == 0) { 1759 al = SSL_AD_INTERNAL_ERROR; 1760 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); 1761 goto f_err; 1762 } 1763 1764 SSL_SESSION_free(s->session); 1765 s->session = new_sess; 1766 } 1767 1768 n2l(p, s->session->tlsext_tick_lifetime_hint); 1769 n2s(p, ticklen); 1770 /* ticket_lifetime_hint + ticket_length + ticket */ 1771 if (ticklen + 6 != n) { 1772 al = SSL_AD_DECODE_ERROR; 1773 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); 1774 goto f_err; 1775 } 1776 if (s->session->tlsext_tick) { 1777 OPENSSL_free(s->session->tlsext_tick); 1778 s->session->tlsext_ticklen = 0; 1779 } 1780 s->session->tlsext_tick = OPENSSL_malloc(ticklen); 1781 if (!s->session->tlsext_tick) { 1782 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); 1783 goto err; 1784 } 1785 memcpy(s->session->tlsext_tick, p, ticklen); 1786 s->session->tlsext_ticklen = ticklen; 1787 /* 1788 * There are two ways to detect a resumed ticket sesion. One is to set an 1789 * appropriate session ID and then the server must return a match in 1790 * ServerHello. This allows the normal client session ID matching to work 1791 * and we know much earlier that the ticket has been accepted. The 1792 * other way is to set zero length session ID when the ticket is 1793 * presented and rely on the handshake to determine session resumption. 1794 * We choose the former approach because this fits in with assumptions 1795 * elsewhere in OpenSSL. The session ID is set to the SHA256 (or SHA1 is 1796 * SHA256 is disabled) hash of the ticket. 1797 */ 1798 EVP_Digest(p, ticklen, 1799 s->session->session_id, &s->session->session_id_length, 1800# ifndef OPENSSL_NO_SHA256 1801 EVP_sha256(), NULL); 1802# else 1803 EVP_sha1(), NULL); 1804# endif 1805 ret = 1; 1806 return (ret); 1807 f_err: 1808 ssl3_send_alert(s, SSL3_AL_FATAL, al); 1809 err: 1810 return (-1); 1811} 1812 1813int ssl3_get_cert_status(SSL *s) 1814{ 1815 int ok, al; 1816 unsigned long resplen; 1817 long n; 1818 const unsigned char *p; 1819 1820 n = s->method->ssl_get_message(s, 1821 SSL3_ST_CR_CERT_STATUS_A, 1822 SSL3_ST_CR_CERT_STATUS_B, 1823 SSL3_MT_CERTIFICATE_STATUS, 16384, &ok); 1824 1825 if (!ok) 1826 return ((int)n); 1827 if (n < 4) { 1828 /* need at least status type + length */ 1829 al = SSL_AD_DECODE_ERROR; 1830 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, SSL_R_LENGTH_MISMATCH); 1831 goto f_err; 1832 } 1833 p = (unsigned char *)s->init_msg; 1834 if (*p++ != TLSEXT_STATUSTYPE_ocsp) { 1835 al = SSL_AD_DECODE_ERROR; 1836 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, SSL_R_UNSUPPORTED_STATUS_TYPE); 1837 goto f_err; 1838 } 1839 n2l3(p, resplen); 1840 if (resplen + 4 != (unsigned long)n) { 1841 al = SSL_AD_DECODE_ERROR; 1842 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, SSL_R_LENGTH_MISMATCH); 1843 goto f_err; 1844 } 1845 if (s->tlsext_ocsp_resp) 1846 OPENSSL_free(s->tlsext_ocsp_resp); 1847 s->tlsext_ocsp_resp = BUF_memdup(p, resplen); 1848 if (!s->tlsext_ocsp_resp) { 1849 al = SSL_AD_INTERNAL_ERROR; 1850 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, ERR_R_MALLOC_FAILURE); 1851 goto f_err; 1852 } 1853 s->tlsext_ocsp_resplen = resplen; 1854 if (s->ctx->tlsext_status_cb) { 1855 int ret; 1856 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg); 1857 if (ret == 0) { 1858 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE; 1859 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, SSL_R_INVALID_STATUS_RESPONSE); 1860 goto f_err; 1861 } 1862 if (ret < 0) { 1863 al = SSL_AD_INTERNAL_ERROR; 1864 SSLerr(SSL_F_SSL3_GET_CERT_STATUS, ERR_R_MALLOC_FAILURE); 1865 goto f_err; 1866 } 1867 } 1868 return 1; 1869 f_err: 1870 ssl3_send_alert(s, SSL3_AL_FATAL, al); 1871 return (-1); 1872} 1873#endif 1874 1875int ssl3_get_server_done(SSL *s) 1876{ 1877 int ok, ret = 0; 1878 long n; 1879 1880 /* Second to last param should be very small, like 0 :-) */ 1881 n = s->method->ssl_get_message(s, 1882 SSL3_ST_CR_SRVR_DONE_A, 1883 SSL3_ST_CR_SRVR_DONE_B, 1884 SSL3_MT_SERVER_DONE, 30, &ok); 1885 1886 if (!ok) 1887 return ((int)n); 1888 if (n > 0) { 1889 /* should contain no data */ 1890 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); 1891 SSLerr(SSL_F_SSL3_GET_SERVER_DONE, SSL_R_LENGTH_MISMATCH); 1892 return -1; 1893 } 1894 ret = 1; 1895 return (ret); 1896} 1897 1898int ssl3_send_client_key_exchange(SSL *s) 1899{ 1900 unsigned char *p, *d; 1901 int n; 1902 unsigned long l; 1903#ifndef OPENSSL_NO_RSA 1904 unsigned char *q; 1905 EVP_PKEY *pkey = NULL; 1906#endif 1907#ifndef OPENSSL_NO_KRB5 1908 KSSL_ERR kssl_err; 1909#endif /* OPENSSL_NO_KRB5 */ 1910#ifndef OPENSSL_NO_ECDH 1911 EC_KEY *clnt_ecdh = NULL; 1912 const EC_POINT *srvr_ecpoint = NULL; 1913 EVP_PKEY *srvr_pub_pkey = NULL; 1914 unsigned char *encodedPoint = NULL; 1915 int encoded_pt_len = 0; 1916 BN_CTX *bn_ctx = NULL; 1917#endif 1918 1919 if (s->state == SSL3_ST_CW_KEY_EXCH_A) { 1920 d = (unsigned char *)s->init_buf->data; 1921 p = &(d[4]); 1922 1923 l = s->s3->tmp.new_cipher->algorithms; 1924 1925 /* Fool emacs indentation */ 1926 if (0) { 1927 } 1928#ifndef OPENSSL_NO_RSA 1929 else if (l & SSL_kRSA) { 1930 RSA *rsa; 1931 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; 1932 1933 if (s->session->sess_cert == NULL) { 1934 /* 1935 * We should always have a server certificate with SSL_kRSA. 1936 */ 1937 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 1938 ERR_R_INTERNAL_ERROR); 1939 goto err; 1940 } 1941 1942 if (s->session->sess_cert->peer_rsa_tmp != NULL) 1943 rsa = s->session->sess_cert->peer_rsa_tmp; 1944 else { 1945 pkey = 1946 X509_get_pubkey(s->session-> 1947 sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC]. 1948 x509); 1949 if ((pkey == NULL) || (pkey->type != EVP_PKEY_RSA) 1950 || (pkey->pkey.rsa == NULL)) { 1951 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 1952 ERR_R_INTERNAL_ERROR); 1953 goto err; 1954 } 1955 rsa = pkey->pkey.rsa; 1956 EVP_PKEY_free(pkey); 1957 } 1958 1959 tmp_buf[0] = s->client_version >> 8; 1960 tmp_buf[1] = s->client_version & 0xff; 1961 if (RAND_bytes(&(tmp_buf[2]), sizeof tmp_buf - 2) <= 0) 1962 goto err; 1963 1964 s->session->master_key_length = sizeof tmp_buf; 1965 1966 q = p; 1967 /* Fix buf for TLS and beyond */ 1968 if (s->version > SSL3_VERSION) 1969 p += 2; 1970 n = RSA_public_encrypt(sizeof tmp_buf, 1971 tmp_buf, p, rsa, RSA_PKCS1_PADDING); 1972# ifdef PKCS1_CHECK 1973 if (s->options & SSL_OP_PKCS1_CHECK_1) 1974 p[1]++; 1975 if (s->options & SSL_OP_PKCS1_CHECK_2) 1976 tmp_buf[0] = 0x70; 1977# endif 1978 if (n <= 0) { 1979 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 1980 SSL_R_BAD_RSA_ENCRYPT); 1981 goto err; 1982 } 1983 1984 /* Fix buf for TLS and beyond */ 1985 if (s->version > SSL3_VERSION) { 1986 s2n(n, q); 1987 n += 2; 1988 } 1989 1990 s->session->master_key_length = 1991 s->method->ssl3_enc->generate_master_secret(s, 1992 s-> 1993 session->master_key, 1994 tmp_buf, 1995 sizeof tmp_buf); 1996 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf); 1997 } 1998#endif 1999#ifndef OPENSSL_NO_KRB5 2000 else if (l & SSL_kKRB5) { 2001 krb5_error_code krb5rc; 2002 KSSL_CTX *kssl_ctx = s->kssl_ctx; 2003 /* krb5_data krb5_ap_req; */ 2004 krb5_data *enc_ticket; 2005 krb5_data authenticator, *authp = NULL; 2006 EVP_CIPHER_CTX ciph_ctx; 2007 EVP_CIPHER *enc = NULL; 2008 unsigned char iv[EVP_MAX_IV_LENGTH]; 2009 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; 2010 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH + EVP_MAX_IV_LENGTH]; 2011 int padl, outl = sizeof(epms); 2012 2013 EVP_CIPHER_CTX_init(&ciph_ctx); 2014 2015# ifdef KSSL_DEBUG 2016 printf("ssl3_send_client_key_exchange(%lx & %lx)\n", 2017 l, SSL_kKRB5); 2018# endif /* KSSL_DEBUG */ 2019 2020 authp = NULL; 2021# ifdef KRB5SENDAUTH 2022 if (KRB5SENDAUTH) 2023 authp = &authenticator; 2024# endif /* KRB5SENDAUTH */ 2025 2026 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp, &kssl_err); 2027 enc = kssl_map_enc(kssl_ctx->enctype); 2028 if (enc == NULL) 2029 goto err; 2030# ifdef KSSL_DEBUG 2031 { 2032 printf("kssl_cget_tkt rtn %d\n", krb5rc); 2033 if (krb5rc && kssl_err.text) 2034 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text); 2035 } 2036# endif /* KSSL_DEBUG */ 2037 2038 if (krb5rc) { 2039 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); 2040 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, kssl_err.reason); 2041 goto err; 2042 } 2043 2044 /*- 2045 * 20010406 VRS - Earlier versions used KRB5 AP_REQ 2046 * in place of RFC 2712 KerberosWrapper, as in: 2047 * 2048 * Send ticket (copy to *p, set n = length) 2049 * n = krb5_ap_req.length; 2050 * memcpy(p, krb5_ap_req.data, krb5_ap_req.length); 2051 * if (krb5_ap_req.data) 2052 * kssl_krb5_free_data_contents(NULL,&krb5_ap_req); 2053 * 2054 * Now using real RFC 2712 KerberosWrapper 2055 * (Thanks to Simon Wilkinson <sxw@sxw.org.uk>) 2056 * Note: 2712 "opaque" types are here replaced 2057 * with a 2-byte length followed by the value. 2058 * Example: 2059 * KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms 2060 * Where "xx xx" = length bytes. Shown here with 2061 * optional authenticator omitted. 2062 */ 2063 2064 /* KerberosWrapper.Ticket */ 2065 s2n(enc_ticket->length, p); 2066 memcpy(p, enc_ticket->data, enc_ticket->length); 2067 p += enc_ticket->length; 2068 n = enc_ticket->length + 2; 2069 2070 /* KerberosWrapper.Authenticator */ 2071 if (authp && authp->length) { 2072 s2n(authp->length, p); 2073 memcpy(p, authp->data, authp->length); 2074 p += authp->length; 2075 n += authp->length + 2; 2076 2077 free(authp->data); 2078 authp->data = NULL; 2079 authp->length = 0; 2080 } else { 2081 s2n(0, p); /* null authenticator length */ 2082 n += 2; 2083 } 2084 2085 tmp_buf[0] = s->client_version >> 8; 2086 tmp_buf[1] = s->client_version & 0xff; 2087 if (RAND_bytes(&(tmp_buf[2]), sizeof tmp_buf - 2) <= 0) 2088 goto err; 2089 2090 /*- 2091 * 20010420 VRS. Tried it this way; failed. 2092 * EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL); 2093 * EVP_CIPHER_CTX_set_key_length(&ciph_ctx, 2094 * kssl_ctx->length); 2095 * EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv); 2096 */ 2097 2098 memset(iv, 0, sizeof iv); /* per RFC 1510 */ 2099 EVP_EncryptInit_ex(&ciph_ctx, enc, NULL, kssl_ctx->key, iv); 2100 EVP_EncryptUpdate(&ciph_ctx, epms, &outl, tmp_buf, 2101 sizeof tmp_buf); 2102 EVP_EncryptFinal_ex(&ciph_ctx, &(epms[outl]), &padl); 2103 outl += padl; 2104 if (outl > sizeof epms) { 2105 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2106 ERR_R_INTERNAL_ERROR); 2107 goto err; 2108 } 2109 EVP_CIPHER_CTX_cleanup(&ciph_ctx); 2110 2111 /* KerberosWrapper.EncryptedPreMasterSecret */ 2112 s2n(outl, p); 2113 memcpy(p, epms, outl); 2114 p += outl; 2115 n += outl + 2; 2116 2117 s->session->master_key_length = 2118 s->method->ssl3_enc->generate_master_secret(s, 2119 s-> 2120 session->master_key, 2121 tmp_buf, 2122 sizeof tmp_buf); 2123 2124 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf); 2125 OPENSSL_cleanse(epms, outl); 2126 } 2127#endif 2128#ifndef OPENSSL_NO_DH 2129 else if (l & (SSL_kEDH | SSL_kDHr | SSL_kDHd)) { 2130 DH *dh_srvr, *dh_clnt; 2131 2132 if (s->session->sess_cert == NULL) { 2133 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE); 2134 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2135 SSL_R_UNEXPECTED_MESSAGE); 2136 goto err; 2137 } 2138 2139 if (s->session->sess_cert->peer_dh_tmp != NULL) 2140 dh_srvr = s->session->sess_cert->peer_dh_tmp; 2141 else { 2142 /* we get them from the cert */ 2143 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); 2144 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2145 SSL_R_UNABLE_TO_FIND_DH_PARAMETERS); 2146 goto err; 2147 } 2148 2149 /* generate a new random key */ 2150 if ((dh_clnt = DHparams_dup(dh_srvr)) == NULL) { 2151 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB); 2152 goto err; 2153 } 2154 if (!DH_generate_key(dh_clnt)) { 2155 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB); 2156 goto err; 2157 } 2158 2159 /* 2160 * use the 'p' output buffer for the DH key, but make sure to 2161 * clear it out afterwards 2162 */ 2163 2164 n = DH_compute_key(p, dh_srvr->pub_key, dh_clnt); 2165 2166 if (n <= 0) { 2167 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB); 2168 goto err; 2169 } 2170 2171 /* generate master key from the result */ 2172 s->session->master_key_length = 2173 s->method->ssl3_enc->generate_master_secret(s, 2174 s-> 2175 session->master_key, 2176 p, n); 2177 /* clean up */ 2178 memset(p, 0, n); 2179 2180 /* send off the data */ 2181 n = BN_num_bytes(dh_clnt->pub_key); 2182 s2n(n, p); 2183 BN_bn2bin(dh_clnt->pub_key, p); 2184 n += 2; 2185 2186 DH_free(dh_clnt); 2187 2188 /* perhaps clean things up a bit EAY EAY EAY EAY */ 2189 } 2190#endif 2191 2192#ifndef OPENSSL_NO_ECDH 2193 else if ((l & SSL_kECDH) || (l & SSL_kECDHE)) { 2194 const EC_GROUP *srvr_group = NULL; 2195 EC_KEY *tkey; 2196 int ecdh_clnt_cert = 0; 2197 int field_size = 0; 2198 2199 if (s->session->sess_cert == NULL) { 2200 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE); 2201 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2202 SSL_R_UNEXPECTED_MESSAGE); 2203 goto err; 2204 } 2205 2206 /* 2207 * Did we send out the client's ECDH share for use in premaster 2208 * computation as part of client certificate? If so, set 2209 * ecdh_clnt_cert to 1. 2210 */ 2211 if ((l & SSL_kECDH) && (s->cert != NULL)) { 2212 /*- 2213 * XXX: For now, we do not support client 2214 * authentication using ECDH certificates. 2215 * To add such support, one needs to add 2216 * code that checks for appropriate 2217 * conditions and sets ecdh_clnt_cert to 1. 2218 * For example, the cert have an ECC 2219 * key on the same curve as the server's 2220 * and the key should be authorized for 2221 * key agreement. 2222 * 2223 * One also needs to add code in ssl3_connect 2224 * to skip sending the certificate verify 2225 * message. 2226 * 2227 * if ((s->cert->key->privatekey != NULL) && 2228 * (s->cert->key->privatekey->type == 2229 * EVP_PKEY_EC) && ...) 2230 * ecdh_clnt_cert = 1; 2231 */ 2232 } 2233 2234 if (s->session->sess_cert->peer_ecdh_tmp != NULL) { 2235 tkey = s->session->sess_cert->peer_ecdh_tmp; 2236 } else { 2237 /* Get the Server Public Key from Cert */ 2238 srvr_pub_pkey = 2239 X509_get_pubkey(s->session-> 2240 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509); 2241 if ((srvr_pub_pkey == NULL) 2242 || (srvr_pub_pkey->type != EVP_PKEY_EC) 2243 || (srvr_pub_pkey->pkey.ec == NULL)) { 2244 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2245 ERR_R_INTERNAL_ERROR); 2246 goto err; 2247 } 2248 2249 tkey = srvr_pub_pkey->pkey.ec; 2250 } 2251 2252 srvr_group = EC_KEY_get0_group(tkey); 2253 srvr_ecpoint = EC_KEY_get0_public_key(tkey); 2254 2255 if ((srvr_group == NULL) || (srvr_ecpoint == NULL)) { 2256 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2257 ERR_R_INTERNAL_ERROR); 2258 goto err; 2259 } 2260 2261 if ((clnt_ecdh = EC_KEY_new()) == NULL) { 2262 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2263 ERR_R_MALLOC_FAILURE); 2264 goto err; 2265 } 2266 2267 if (!EC_KEY_set_group(clnt_ecdh, srvr_group)) { 2268 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB); 2269 goto err; 2270 } 2271 if (ecdh_clnt_cert) { 2272 /* 2273 * Reuse key info from our certificate We only need our 2274 * private key to perform the ECDH computation. 2275 */ 2276 const BIGNUM *priv_key; 2277 tkey = s->cert->key->privatekey->pkey.ec; 2278 priv_key = EC_KEY_get0_private_key(tkey); 2279 if (priv_key == NULL) { 2280 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2281 ERR_R_MALLOC_FAILURE); 2282 goto err; 2283 } 2284 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key)) { 2285 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB); 2286 goto err; 2287 } 2288 } else { 2289 /* Generate a new ECDH key pair */ 2290 if (!(EC_KEY_generate_key(clnt_ecdh))) { 2291 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2292 ERR_R_ECDH_LIB); 2293 goto err; 2294 } 2295 } 2296 2297 /* 2298 * use the 'p' output buffer for the ECDH key, but make sure to 2299 * clear it out afterwards 2300 */ 2301 2302 field_size = EC_GROUP_get_degree(srvr_group); 2303 if (field_size <= 0) { 2304 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB); 2305 goto err; 2306 } 2307 n = ECDH_compute_key(p, (field_size + 7) / 8, srvr_ecpoint, 2308 clnt_ecdh, NULL); 2309 if (n <= 0) { 2310 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB); 2311 goto err; 2312 } 2313 2314 /* generate master key from the result */ 2315 s->session->master_key_length = 2316 s->method->ssl3_enc->generate_master_secret(s, 2317 s-> 2318 session->master_key, 2319 p, n); 2320 2321 memset(p, 0, n); /* clean up */ 2322 2323 if (ecdh_clnt_cert) { 2324 /* Send empty client key exch message */ 2325 n = 0; 2326 } else { 2327 /* 2328 * First check the size of encoding and allocate memory 2329 * accordingly. 2330 */ 2331 encoded_pt_len = 2332 EC_POINT_point2oct(srvr_group, 2333 EC_KEY_get0_public_key(clnt_ecdh), 2334 POINT_CONVERSION_UNCOMPRESSED, 2335 NULL, 0, NULL); 2336 2337 encodedPoint = (unsigned char *) 2338 OPENSSL_malloc(encoded_pt_len * sizeof(unsigned char)); 2339 bn_ctx = BN_CTX_new(); 2340 if ((encodedPoint == NULL) || (bn_ctx == NULL)) { 2341 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2342 ERR_R_MALLOC_FAILURE); 2343 goto err; 2344 } 2345 2346 /* Encode the public key */ 2347 n = EC_POINT_point2oct(srvr_group, 2348 EC_KEY_get0_public_key(clnt_ecdh), 2349 POINT_CONVERSION_UNCOMPRESSED, 2350 encodedPoint, encoded_pt_len, bn_ctx); 2351 2352 *p = n; /* length of encoded point */ 2353 /* Encoded point will be copied here */ 2354 p += 1; 2355 /* copy the point */ 2356 memcpy((unsigned char *)p, encodedPoint, n); 2357 /* increment n to account for length field */ 2358 n += 1; 2359 } 2360 2361 /* Free allocated memory */ 2362 BN_CTX_free(bn_ctx); 2363 if (encodedPoint != NULL) 2364 OPENSSL_free(encodedPoint); 2365 if (clnt_ecdh != NULL) 2366 EC_KEY_free(clnt_ecdh); 2367 EVP_PKEY_free(srvr_pub_pkey); 2368 } 2369#endif /* !OPENSSL_NO_ECDH */ 2370 else { 2371 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); 2372 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); 2373 goto err; 2374 } 2375 2376 *(d++) = SSL3_MT_CLIENT_KEY_EXCHANGE; 2377 l2n3(n, d); 2378 2379 s->state = SSL3_ST_CW_KEY_EXCH_B; 2380 /* number of bytes to write */ 2381 s->init_num = n + 4; 2382 s->init_off = 0; 2383 } 2384 2385 /* SSL3_ST_CW_KEY_EXCH_B */ 2386 return (ssl3_do_write(s, SSL3_RT_HANDSHAKE)); 2387 err: 2388#ifndef OPENSSL_NO_ECDH 2389 BN_CTX_free(bn_ctx); 2390 if (encodedPoint != NULL) 2391 OPENSSL_free(encodedPoint); 2392 if (clnt_ecdh != NULL) 2393 EC_KEY_free(clnt_ecdh); 2394 EVP_PKEY_free(srvr_pub_pkey); 2395#endif 2396 return (-1); 2397} 2398 2399int ssl3_send_client_verify(SSL *s) 2400{ 2401 unsigned char *p, *d; 2402 unsigned char data[MD5_DIGEST_LENGTH + SHA_DIGEST_LENGTH]; 2403 EVP_PKEY *pkey; 2404#ifndef OPENSSL_NO_RSA 2405 unsigned u = 0; 2406#endif 2407 unsigned long n; 2408#if !defined(OPENSSL_NO_DSA) || !defined(OPENSSL_NO_ECDSA) 2409 int j; 2410#endif 2411 2412 if (s->state == SSL3_ST_CW_CERT_VRFY_A) { 2413 d = (unsigned char *)s->init_buf->data; 2414 p = &(d[4]); 2415 pkey = s->cert->key->privatekey; 2416 2417 s->method->ssl3_enc->cert_verify_mac(s, &(s->s3->finish_dgst2), 2418 &(data[MD5_DIGEST_LENGTH])); 2419 2420#ifndef OPENSSL_NO_RSA 2421 if (pkey->type == EVP_PKEY_RSA) { 2422 s->method->ssl3_enc->cert_verify_mac(s, 2423 &(s->s3->finish_dgst1), 2424 &(data[0])); 2425 if (RSA_sign 2426 (NID_md5_sha1, data, MD5_DIGEST_LENGTH + SHA_DIGEST_LENGTH, 2427 &(p[2]), &u, pkey->pkey.rsa) <= 0) { 2428 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_RSA_LIB); 2429 goto err; 2430 } 2431 s2n(u, p); 2432 n = u + 2; 2433 } else 2434#endif 2435#ifndef OPENSSL_NO_DSA 2436 if (pkey->type == EVP_PKEY_DSA) { 2437 if (!DSA_sign(pkey->save_type, 2438 &(data[MD5_DIGEST_LENGTH]), 2439 SHA_DIGEST_LENGTH, &(p[2]), 2440 (unsigned int *)&j, pkey->pkey.dsa)) { 2441 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_DSA_LIB); 2442 goto err; 2443 } 2444 s2n(j, p); 2445 n = j + 2; 2446 } else 2447#endif 2448#ifndef OPENSSL_NO_ECDSA 2449 if (pkey->type == EVP_PKEY_EC) { 2450 if (!ECDSA_sign(pkey->save_type, 2451 &(data[MD5_DIGEST_LENGTH]), 2452 SHA_DIGEST_LENGTH, &(p[2]), 2453 (unsigned int *)&j, pkey->pkey.ec)) { 2454 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_ECDSA_LIB); 2455 goto err; 2456 } 2457 s2n(j, p); 2458 n = j + 2; 2459 } else 2460#endif 2461 { 2462 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR); 2463 goto err; 2464 } 2465 *(d++) = SSL3_MT_CERTIFICATE_VERIFY; 2466 l2n3(n, d); 2467 2468 s->state = SSL3_ST_CW_CERT_VRFY_B; 2469 s->init_num = (int)n + 4; 2470 s->init_off = 0; 2471 } 2472 return (ssl3_do_write(s, SSL3_RT_HANDSHAKE)); 2473 err: 2474 return (-1); 2475} 2476 2477int ssl3_send_client_certificate(SSL *s) 2478{ 2479 X509 *x509 = NULL; 2480 EVP_PKEY *pkey = NULL; 2481 int i; 2482 unsigned long l; 2483 2484 if (s->state == SSL3_ST_CW_CERT_A) { 2485 if ((s->cert == NULL) || 2486 (s->cert->key->x509 == NULL) || 2487 (s->cert->key->privatekey == NULL)) 2488 s->state = SSL3_ST_CW_CERT_B; 2489 else 2490 s->state = SSL3_ST_CW_CERT_C; 2491 } 2492 2493 /* We need to get a client cert */ 2494 if (s->state == SSL3_ST_CW_CERT_B) { 2495 /* 2496 * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP; 2497 * return(-1); We then get retied later 2498 */ 2499 i = 0; 2500 i = ssl_do_client_cert_cb(s, &x509, &pkey); 2501 if (i < 0) { 2502 s->rwstate = SSL_X509_LOOKUP; 2503 return (-1); 2504 } 2505 s->rwstate = SSL_NOTHING; 2506 if ((i == 1) && (pkey != NULL) && (x509 != NULL)) { 2507 s->state = SSL3_ST_CW_CERT_B; 2508 if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey)) 2509 i = 0; 2510 } else if (i == 1) { 2511 i = 0; 2512 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE, 2513 SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); 2514 } 2515 2516 if (x509 != NULL) 2517 X509_free(x509); 2518 if (pkey != NULL) 2519 EVP_PKEY_free(pkey); 2520 if (i == 0) { 2521 if (s->version == SSL3_VERSION) { 2522 s->s3->tmp.cert_req = 0; 2523 ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE); 2524 return (1); 2525 } else { 2526 s->s3->tmp.cert_req = 2; 2527 } 2528 } 2529 2530 /* Ok, we have a cert */ 2531 s->state = SSL3_ST_CW_CERT_C; 2532 } 2533 2534 if (s->state == SSL3_ST_CW_CERT_C) { 2535 s->state = SSL3_ST_CW_CERT_D; 2536 l = ssl3_output_cert_chain(s, 2537 (s->s3->tmp.cert_req == 2538 2) ? NULL : s->cert->key->x509); 2539 s->init_num = (int)l; 2540 s->init_off = 0; 2541 } 2542 /* SSL3_ST_CW_CERT_D */ 2543 return (ssl3_do_write(s, SSL3_RT_HANDSHAKE)); 2544} 2545 2546#define has_bits(i,m) (((i)&(m)) == (m)) 2547 2548int ssl3_check_cert_and_algorithm(SSL *s) 2549{ 2550 int i, idx; 2551 long algs; 2552 EVP_PKEY *pkey = NULL; 2553 SESS_CERT *sc; 2554#ifndef OPENSSL_NO_RSA 2555 RSA *rsa; 2556#endif 2557#ifndef OPENSSL_NO_DH 2558 DH *dh; 2559#endif 2560 2561 sc = s->session->sess_cert; 2562 2563 algs = s->s3->tmp.new_cipher->algorithms; 2564 2565 /* we don't have a certificate */ 2566 if (algs & (SSL_aDH | SSL_aNULL | SSL_aKRB5)) 2567 return (1); 2568 2569 if (sc == NULL) { 2570 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR); 2571 goto err; 2572 } 2573#ifndef OPENSSL_NO_RSA 2574 rsa = s->session->sess_cert->peer_rsa_tmp; 2575#endif 2576#ifndef OPENSSL_NO_DH 2577 dh = s->session->sess_cert->peer_dh_tmp; 2578#endif 2579 2580 /* This is the passed certificate */ 2581 2582 idx = sc->peer_cert_type; 2583#ifndef OPENSSL_NO_ECDH 2584 if (idx == SSL_PKEY_ECC) { 2585 if (check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509, 2586 s->s3->tmp.new_cipher) == 0) { 2587 /* check failed */ 2588 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_BAD_ECC_CERT); 2589 goto f_err; 2590 } else { 2591 return 1; 2592 } 2593 } 2594#endif 2595 pkey = X509_get_pubkey(sc->peer_pkeys[idx].x509); 2596 i = X509_certificate_type(sc->peer_pkeys[idx].x509, pkey); 2597 EVP_PKEY_free(pkey); 2598 2599 /* Check that we have a certificate if we require one */ 2600 if ((algs & SSL_aRSA) && !has_bits(i, EVP_PK_RSA | EVP_PKT_SIGN)) { 2601 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, 2602 SSL_R_MISSING_RSA_SIGNING_CERT); 2603 goto f_err; 2604 } 2605#ifndef OPENSSL_NO_DSA 2606 else if ((algs & SSL_aDSS) && !has_bits(i, EVP_PK_DSA | EVP_PKT_SIGN)) { 2607 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, 2608 SSL_R_MISSING_DSA_SIGNING_CERT); 2609 goto f_err; 2610 } 2611#endif 2612#ifndef OPENSSL_NO_RSA 2613 if ((algs & SSL_kRSA) && 2614 !(has_bits(i, EVP_PK_RSA | EVP_PKT_ENC) || (rsa != NULL))) { 2615 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, 2616 SSL_R_MISSING_RSA_ENCRYPTING_CERT); 2617 goto f_err; 2618 } 2619#endif 2620#ifndef OPENSSL_NO_DH 2621 if ((algs & SSL_kEDH) && 2622 !(has_bits(i, EVP_PK_DH | EVP_PKT_EXCH) || (dh != NULL))) { 2623 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_MISSING_DH_KEY); 2624 goto f_err; 2625 } else if ((algs & SSL_kDHr) && !has_bits(i, EVP_PK_DH | EVP_PKS_RSA)) { 2626 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, 2627 SSL_R_MISSING_DH_RSA_CERT); 2628 goto f_err; 2629 } 2630# ifndef OPENSSL_NO_DSA 2631 else if ((algs & SSL_kDHd) && !has_bits(i, EVP_PK_DH | EVP_PKS_DSA)) { 2632 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, 2633 SSL_R_MISSING_DH_DSA_CERT); 2634 goto f_err; 2635 } 2636# endif 2637#endif 2638 2639 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i, EVP_PKT_EXP)) { 2640#ifndef OPENSSL_NO_RSA 2641 if (algs & SSL_kRSA) { 2642 if (rsa == NULL 2643 || RSA_size(rsa) * 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_RSA_KEY); 2647 goto f_err; 2648 } 2649 } else 2650#endif 2651#ifndef OPENSSL_NO_DH 2652 if (algs & (SSL_kEDH | SSL_kDHr | SSL_kDHd)) { 2653 if (dh == NULL 2654 || DH_size(dh) * 8 > 2655 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) { 2656 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, 2657 SSL_R_MISSING_EXPORT_TMP_DH_KEY); 2658 goto f_err; 2659 } 2660 } else 2661#endif 2662 { 2663 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, 2664 SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE); 2665 goto f_err; 2666 } 2667 } 2668 return (1); 2669 f_err: 2670 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); 2671 err: 2672 return (0); 2673} 2674 2675#ifndef OPENSSL_NO_ECDH 2676/* This is the complement of nid2curve_id in s3_srvr.c. */ 2677static int curve_id2nid(int curve_id) 2678{ 2679 /* 2680 * ECC curves from draft-ietf-tls-ecc-01.txt (Mar 15, 2001) (no changes 2681 * in draft-ietf-tls-ecc-03.txt [June 2003]) 2682 */ 2683 static int nid_list[26] = { 2684 0, 2685 NID_sect163k1, /* sect163k1 (1) */ 2686 NID_sect163r1, /* sect163r1 (2) */ 2687 NID_sect163r2, /* sect163r2 (3) */ 2688 NID_sect193r1, /* sect193r1 (4) */ 2689 NID_sect193r2, /* sect193r2 (5) */ 2690 NID_sect233k1, /* sect233k1 (6) */ 2691 NID_sect233r1, /* sect233r1 (7) */ 2692 NID_sect239k1, /* sect239k1 (8) */ 2693 NID_sect283k1, /* sect283k1 (9) */ 2694 NID_sect283r1, /* sect283r1 (10) */ 2695 NID_sect409k1, /* sect409k1 (11) */ 2696 NID_sect409r1, /* sect409r1 (12) */ 2697 NID_sect571k1, /* sect571k1 (13) */ 2698 NID_sect571r1, /* sect571r1 (14) */ 2699 NID_secp160k1, /* secp160k1 (15) */ 2700 NID_secp160r1, /* secp160r1 (16) */ 2701 NID_secp160r2, /* secp160r2 (17) */ 2702 NID_secp192k1, /* secp192k1 (18) */ 2703 NID_X9_62_prime192v1, /* secp192r1 (19) */ 2704 NID_secp224k1, /* secp224k1 (20) */ 2705 NID_secp224r1, /* secp224r1 (21) */ 2706 NID_secp256k1, /* secp256k1 (22) */ 2707 NID_X9_62_prime256v1, /* secp256r1 (23) */ 2708 NID_secp384r1, /* secp384r1 (24) */ 2709 NID_secp521r1 /* secp521r1 (25) */ 2710 }; 2711 2712 if ((curve_id < 1) || (curve_id > 25)) 2713 return 0; 2714 2715 return nid_list[curve_id]; 2716} 2717#endif 2718 2719/* 2720 * Check to see if handshake is full or resumed. Usually this is just a case 2721 * of checking to see if a cache hit has occurred. In the case of session 2722 * tickets we have to check the next message to be sure. 2723 */ 2724 2725#ifndef OPENSSL_NO_TLSEXT 2726int ssl3_check_finished(SSL *s) 2727{ 2728 int ok; 2729 long n; 2730 /* 2731 * If we have no ticket or session ID is non-zero length (a match of a 2732 * non-zero session length would never reach here) it cannot be a resumed 2733 * session. 2734 */ 2735 if (!s->session->tlsext_tick || s->session->session_id_length) 2736 return 1; 2737 /* 2738 * this function is called when we really expect a Certificate message, 2739 * so permit appropriate message length 2740 */ 2741 n = s->method->ssl_get_message(s, 2742 SSL3_ST_CR_CERT_A, 2743 SSL3_ST_CR_CERT_B, 2744 -1, s->max_cert_list, &ok); 2745 if (!ok) 2746 return ((int)n); 2747 s->s3->tmp.reuse_message = 1; 2748 if ((s->s3->tmp.message_type == SSL3_MT_FINISHED) 2749 || (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET)) 2750 return 2; 2751 2752 return 1; 2753} 2754#endif 2755 2756int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey) 2757{ 2758 int i = 0; 2759#ifndef OPENSSL_NO_ENGINE 2760 if (s->ctx->client_cert_engine) { 2761 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s, 2762 SSL_get_client_CA_list(s), 2763 px509, ppkey, NULL, NULL, NULL); 2764 if (i != 0) 2765 return i; 2766 } 2767#endif 2768 if (s->ctx->client_cert_cb) 2769 i = s->ctx->client_cert_cb(s, px509, ppkey); 2770 return i; 2771} 2772