s3_clnt.c revision 284295
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, 164 ssl3_get_client_method) 165 166int ssl3_connect(SSL *s) 167 { 168 BUF_MEM *buf=NULL; 169 unsigned long Time=(unsigned long)time(NULL); 170 void (*cb)(const SSL *ssl,int type,int val)=NULL; 171 int ret= -1; 172 int new_state,state,skip=0; 173 174 RAND_add(&Time,sizeof(Time),0); 175 ERR_clear_error(); 176 clear_sys_error(); 177 178 if (s->info_callback != NULL) 179 cb=s->info_callback; 180 else if (s->ctx->info_callback != NULL) 181 cb=s->ctx->info_callback; 182 183 s->in_handshake++; 184 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); 185 186 for (;;) 187 { 188 state=s->state; 189 190 switch(s->state) 191 { 192 case SSL_ST_RENEGOTIATE: 193 s->new_session=1; 194 s->state=SSL_ST_CONNECT; 195 s->ctx->stats.sess_connect_renegotiate++; 196 /* break */ 197 case SSL_ST_BEFORE: 198 case SSL_ST_CONNECT: 199 case SSL_ST_BEFORE|SSL_ST_CONNECT: 200 case SSL_ST_OK|SSL_ST_CONNECT: 201 202 s->server=0; 203 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1); 204 205 if ((s->version & 0xff00 ) != 0x0300) 206 { 207 SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR); 208 ret = -1; 209 goto end; 210 } 211 212 /* s->version=SSL3_VERSION; */ 213 s->type=SSL_ST_CONNECT; 214 215 if (s->init_buf == NULL) 216 { 217 if ((buf=BUF_MEM_new()) == NULL) 218 { 219 ret= -1; 220 goto end; 221 } 222 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH)) 223 { 224 ret= -1; 225 goto end; 226 } 227 s->init_buf=buf; 228 buf=NULL; 229 } 230 231 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; } 232 233 /* setup buffing BIO */ 234 if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; } 235 236 /* don't push the buffering BIO quite yet */ 237 238 ssl3_init_finished_mac(s); 239 240 s->state=SSL3_ST_CW_CLNT_HELLO_A; 241 s->ctx->stats.sess_connect++; 242 s->init_num=0; 243 break; 244 245 case SSL3_ST_CW_CLNT_HELLO_A: 246 case SSL3_ST_CW_CLNT_HELLO_B: 247 248 s->shutdown=0; 249 ret=ssl3_client_hello(s); 250 if (ret <= 0) goto end; 251 s->state=SSL3_ST_CR_SRVR_HELLO_A; 252 s->init_num=0; 253 254 /* turn on buffering for the next lot of output */ 255 if (s->bbio != s->wbio) 256 s->wbio=BIO_push(s->bbio,s->wbio); 257 258 break; 259 260 case SSL3_ST_CR_SRVR_HELLO_A: 261 case SSL3_ST_CR_SRVR_HELLO_B: 262 ret=ssl3_get_server_hello(s); 263 if (ret <= 0) goto end; 264 if (s->hit) 265 { 266 s->state=SSL3_ST_CR_FINISHED_A; 267#ifndef OPENSSL_NO_TLSEXT 268 if (s->tlsext_ticket_expected) 269 { 270 /* receive renewed session ticket */ 271 s->state=SSL3_ST_CR_SESSION_TICKET_A; 272 } 273#endif 274 } 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) goto end; 285 if (ret == 2) 286 { 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 { 299 ret=ssl3_get_server_certificate(s); 300 if (ret <= 0) 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 } 307 else 308 { 309 skip = 1; 310 s->state=SSL3_ST_CR_KEY_EXCH_A; 311 } 312#else 313 } 314 else 315 skip=1; 316 317 s->state=SSL3_ST_CR_KEY_EXCH_A; 318#endif 319 s->init_num=0; 320 break; 321 322 case SSL3_ST_CR_KEY_EXCH_A: 323 case SSL3_ST_CR_KEY_EXCH_B: 324 ret=ssl3_get_key_exchange(s); 325 if (ret <= 0) goto end; 326 s->state=SSL3_ST_CR_CERT_REQ_A; 327 s->init_num=0; 328 329 /* at this point we check that we have the 330 * required stuff from the server */ 331 if (!ssl3_check_cert_and_algorithm(s)) 332 { 333 ret= -1; 334 goto end; 335 } 336 break; 337 338 case SSL3_ST_CR_CERT_REQ_A: 339 case SSL3_ST_CR_CERT_REQ_B: 340 ret=ssl3_get_certificate_request(s); 341 if (ret <= 0) 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) goto end; 350 if (s->s3->tmp.cert_req) 351 s->state=SSL3_ST_CW_CERT_A; 352 else 353 s->state=SSL3_ST_CW_KEY_EXCH_A; 354 s->init_num=0; 355 356 break; 357 358 case SSL3_ST_CW_CERT_A: 359 case SSL3_ST_CW_CERT_B: 360 case SSL3_ST_CW_CERT_C: 361 case SSL3_ST_CW_CERT_D: 362 ret=ssl3_send_client_certificate(s); 363 if (ret <= 0) goto end; 364 s->state=SSL3_ST_CW_KEY_EXCH_A; 365 s->init_num=0; 366 break; 367 368 case SSL3_ST_CW_KEY_EXCH_A: 369 case SSL3_ST_CW_KEY_EXCH_B: 370 ret=ssl3_send_client_key_exchange(s); 371 if (ret <= 0) goto end; 372 /* EAY EAY EAY need to check for DH fix cert 373 * sent back */ 374 /* For TLS, cert_req is set to 2, so a cert chain 375 * of nothing is sent, but no verify packet is sent */ 376 /* XXX: For now, we do not support client 377 * authentication in ECDH cipher suites with 378 * ECDH (rather than ECDSA) certificates. 379 * We need to skip the certificate verify 380 * message when client's ECDH public key is sent 381 * inside the client certificate. 382 */ 383 if (s->s3->tmp.cert_req == 1) 384 { 385 s->state=SSL3_ST_CW_CERT_VRFY_A; 386 } 387 else 388 { 389 s->state=SSL3_ST_CW_CHANGE_A; 390 s->s3->change_cipher_spec=0; 391 } 392 393 s->init_num=0; 394 break; 395 396 case SSL3_ST_CW_CERT_VRFY_A: 397 case SSL3_ST_CW_CERT_VRFY_B: 398 ret=ssl3_send_client_verify(s); 399 if (ret <= 0) goto end; 400 s->state=SSL3_ST_CW_CHANGE_A; 401 s->init_num=0; 402 s->s3->change_cipher_spec=0; 403 break; 404 405 case SSL3_ST_CW_CHANGE_A: 406 case SSL3_ST_CW_CHANGE_B: 407 ret=ssl3_send_change_cipher_spec(s, 408 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B); 409 if (ret <= 0) goto end; 410 s->state=SSL3_ST_CW_FINISHED_A; 411 s->init_num=0; 412 413 s->session->cipher=s->s3->tmp.new_cipher; 414#ifdef OPENSSL_NO_COMP 415 s->session->compress_meth=0; 416#else 417 if (s->s3->tmp.new_compression == NULL) 418 s->session->compress_meth=0; 419 else 420 s->session->compress_meth= 421 s->s3->tmp.new_compression->id; 422#endif 423 if (!s->method->ssl3_enc->setup_key_block(s)) 424 { 425 ret= -1; 426 goto end; 427 } 428 429 if (!s->method->ssl3_enc->change_cipher_state(s, 430 SSL3_CHANGE_CIPHER_CLIENT_WRITE)) 431 { 432 ret= -1; 433 goto end; 434 } 435 436 break; 437 438 case SSL3_ST_CW_FINISHED_A: 439 case SSL3_ST_CW_FINISHED_B: 440 ret=ssl3_send_finished(s, 441 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B, 442 s->method->ssl3_enc->client_finished_label, 443 s->method->ssl3_enc->client_finished_label_len); 444 if (ret <= 0) goto end; 445 s->s3->flags |= SSL3_FLAGS_CCS_OK; 446 s->state=SSL3_ST_CW_FLUSH; 447 448 /* clear flags */ 449 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER; 450 if (s->hit) 451 { 452 s->s3->tmp.next_state=SSL_ST_OK; 453 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED) 454 { 455 s->state=SSL_ST_OK; 456 s->s3->flags|=SSL3_FLAGS_POP_BUFFER; 457 s->s3->delay_buf_pop_ret=0; 458 } 459 } 460 else 461 { 462#ifndef OPENSSL_NO_TLSEXT 463 /* Allow NewSessionTicket if ticket expected */ 464 if (s->tlsext_ticket_expected) 465 s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A; 466 else 467#endif 468 469 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A; 470 } 471 s->init_num=0; 472 break; 473 474#ifndef OPENSSL_NO_TLSEXT 475 case SSL3_ST_CR_SESSION_TICKET_A: 476 case SSL3_ST_CR_SESSION_TICKET_B: 477 ret=ssl3_get_new_session_ticket(s); 478 if (ret <= 0) goto end; 479 s->state=SSL3_ST_CR_FINISHED_A; 480 s->init_num=0; 481 break; 482 483 case SSL3_ST_CR_CERT_STATUS_A: 484 case SSL3_ST_CR_CERT_STATUS_B: 485 ret=ssl3_get_cert_status(s); 486 if (ret <= 0) goto end; 487 s->state=SSL3_ST_CR_KEY_EXCH_A; 488 s->init_num=0; 489 break; 490#endif 491 492 case SSL3_ST_CR_FINISHED_A: 493 case SSL3_ST_CR_FINISHED_B: 494 495 s->s3->flags |= SSL3_FLAGS_CCS_OK; 496 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A, 497 SSL3_ST_CR_FINISHED_B); 498 if (ret <= 0) goto end; 499 500 if (s->hit) 501 s->state=SSL3_ST_CW_CHANGE_A; 502 else 503 s->state=SSL_ST_OK; 504 s->init_num=0; 505 break; 506 507 case SSL3_ST_CW_FLUSH: 508 s->rwstate=SSL_WRITING; 509 if (BIO_flush(s->wbio) <= 0) 510 { 511 ret= -1; 512 goto end; 513 } 514 s->rwstate=SSL_NOTHING; 515 s->state=s->s3->tmp.next_state; 516 break; 517 518 case SSL_ST_OK: 519 /* clean a few things up */ 520 ssl3_cleanup_key_block(s); 521 522 if (s->init_buf != NULL) 523 { 524 BUF_MEM_free(s->init_buf); 525 s->init_buf=NULL; 526 } 527 528 /* If we are not 'joining' the last two packets, 529 * remove the buffering now */ 530 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER)) 531 ssl_free_wbio_buffer(s); 532 /* else do it later in ssl3_write */ 533 534 s->init_num=0; 535 s->new_session=0; 536 537 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT); 538 if (s->hit) s->ctx->stats.sess_hit++; 539 540 ret=1; 541 /* s->server=0; */ 542 s->handshake_func=ssl3_connect; 543 s->ctx->stats.sess_connect_good++; 544 545 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1); 546 547 goto end; 548 /* break; */ 549 550 default: 551 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE); 552 ret= -1; 553 goto end; 554 /* break; */ 555 } 556 557 /* did we do anything */ 558 if (!s->s3->tmp.reuse_message && !skip) 559 { 560 if (s->debug) 561 { 562 if ((ret=BIO_flush(s->wbio)) <= 0) 563 goto end; 564 } 565 566 if ((cb != NULL) && (s->state != state)) 567 { 568 new_state=s->state; 569 s->state=state; 570 cb(s,SSL_CB_CONNECT_LOOP,1); 571 s->state=new_state; 572 } 573 } 574 skip=0; 575 } 576end: 577 s->in_handshake--; 578 if (buf != NULL) 579 BUF_MEM_free(buf); 580 if (cb != NULL) 581 cb(s,SSL_CB_CONNECT_EXIT,ret); 582 return(ret); 583 } 584 585 586int ssl3_client_hello(SSL *s) 587 { 588 unsigned char *buf; 589 unsigned char *p,*d; 590 int i; 591 unsigned long Time,l; 592#ifndef OPENSSL_NO_COMP 593 int j; 594 SSL_COMP *comp; 595#endif 596 597 buf=(unsigned char *)s->init_buf->data; 598 if (s->state == SSL3_ST_CW_CLNT_HELLO_A) 599 { 600 SSL_SESSION *sess = s->session; 601 if ((sess == NULL) || 602 (sess->ssl_version != s->version) || 603#ifdef OPENSSL_NO_TLSEXT 604 !sess->session_id_length || 605#else 606 (!sess->session_id_length && !sess->tlsext_tick) || 607#endif 608 (sess->not_resumable)) 609 { 610 if (!ssl_get_new_session(s,0)) 611 goto err; 612 } 613 /* else use the pre-loaded session */ 614 615 p=s->s3->client_random; 616 Time=(unsigned long)time(NULL); /* Time */ 617 l2n(Time,p); 618 if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0) 619 goto err; 620 621 /* Do the message type and length last */ 622 d=p= &(buf[4]); 623 624 *(p++)=s->version>>8; 625 *(p++)=s->version&0xff; 626 s->client_version=s->version; 627 628 /* Random stuff */ 629 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE); 630 p+=SSL3_RANDOM_SIZE; 631 632 /* Session ID */ 633 if (s->new_session) 634 i=0; 635 else 636 i=s->session->session_id_length; 637 *(p++)=i; 638 if (i != 0) 639 { 640 if (i > (int)sizeof(s->session->session_id)) 641 { 642 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); 643 goto err; 644 } 645 memcpy(p,s->session->session_id,i); 646 p+=i; 647 } 648 649 /* Ciphers supported */ 650 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0); 651 if (i == 0) 652 { 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 { 670 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i); 671 *(p++)=comp->id; 672 } 673#endif 674 *(p++)=0; /* Add the NULL method */ 675#ifndef OPENSSL_NO_TLSEXT 676 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL) 677 { 678 SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR); 679 goto err; 680 } 681#endif 682 l=(p-d); 683 d=buf; 684 *(d++)=SSL3_MT_CLIENT_HELLO; 685 l2n3(l,d); 686 687 s->state=SSL3_ST_CW_CLNT_HELLO_B; 688 /* number of bytes to write */ 689 s->init_num=p-buf; 690 s->init_off=0; 691 } 692 693 /* SSL3_ST_CW_CLNT_HELLO_B */ 694 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 695err: 696 return(-1); 697 } 698 699int ssl3_get_server_hello(SSL *s) 700 { 701 STACK_OF(SSL_CIPHER) *sk; 702 SSL_CIPHER *c; 703 unsigned char *p,*d; 704 int i,al,ok; 705 unsigned int j; 706 long n; 707#ifndef OPENSSL_NO_COMP 708 SSL_COMP *comp; 709#endif 710 711 n=s->method->ssl_get_message(s, 712 SSL3_ST_CR_SRVR_HELLO_A, 713 SSL3_ST_CR_SRVR_HELLO_B, 714 -1, 715 20000, /* ?? */ 716 &ok); 717 718 if (!ok) return((int)n); 719 720 if ( SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER) 721 { 722 if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST) 723 { 724 if ( s->d1->send_cookie == 0) 725 { 726 s->s3->tmp.reuse_message = 1; 727 return 1; 728 } 729 else /* already sent a cookie */ 730 { 731 al=SSL_AD_UNEXPECTED_MESSAGE; 732 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE); 733 goto f_err; 734 } 735 } 736 } 737 738 if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO) 739 { 740 al=SSL_AD_UNEXPECTED_MESSAGE; 741 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE); 742 goto f_err; 743 } 744 745 d=p=(unsigned char *)s->init_msg; 746 747 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff))) 748 { 749 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION); 750 s->version=(s->version&0xff00)|p[1]; 751 al=SSL_AD_PROTOCOL_VERSION; 752 goto f_err; 753 } 754 p+=2; 755 756 /* load the server hello data */ 757 /* load the server random */ 758 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE); 759 p+=SSL3_RANDOM_SIZE; 760 761 /* get the session-id */ 762 j= *(p++); 763 764 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE)) 765 { 766 al=SSL_AD_ILLEGAL_PARAMETER; 767 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG); 768 goto f_err; 769 } 770 771 if (j != 0 && j == s->session->session_id_length 772 && memcmp(p,s->session->session_id,j) == 0) 773 { 774 if(s->sid_ctx_length != s->session->sid_ctx_length 775 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length)) 776 { 777 /* actually a client application bug */ 778 al=SSL_AD_ILLEGAL_PARAMETER; 779 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); 780 goto f_err; 781 } 782 s->s3->flags |= SSL3_FLAGS_CCS_OK; 783 s->hit=1; 784 } 785 else /* a miss or crap from the other end */ 786 { 787 /* If we were trying for session-id reuse, make a new 788 * SSL_SESSION so we don't stuff up other people */ 789 s->hit=0; 790 if (s->session->session_id_length > 0) 791 { 792 if (!ssl_get_new_session(s,0)) 793 { 794 al=SSL_AD_INTERNAL_ERROR; 795 goto f_err; 796 } 797 } 798 s->session->session_id_length=j; 799 memcpy(s->session->session_id,p,j); /* j could be 0 */ 800 } 801 p+=j; 802 c=ssl_get_cipher_by_char(s,p); 803 if (c == NULL) 804 { 805 /* unknown cipher */ 806 al=SSL_AD_ILLEGAL_PARAMETER; 807 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED); 808 goto f_err; 809 } 810 p+=ssl_put_cipher_by_char(s,NULL,NULL); 811 812 sk=ssl_get_ciphers_by_id(s); 813 i=sk_SSL_CIPHER_find(sk,c); 814 if (i < 0) 815 { 816 /* we did not say we would use this cipher */ 817 al=SSL_AD_ILLEGAL_PARAMETER; 818 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED); 819 goto f_err; 820 } 821 822 /* Depending on the session caching (internal/external), the cipher 823 and/or cipher_id values may not be set. Make sure that 824 cipher_id is set and use it for comparison. */ 825 if (s->session->cipher) 826 s->session->cipher_id = s->session->cipher->id; 827 if (s->hit && (s->session->cipher_id != c->id)) 828 { 829/* Workaround is now obsolete */ 830#if 0 831 if (!(s->options & 832 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG)) 833#endif 834 { 835 al=SSL_AD_ILLEGAL_PARAMETER; 836 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); 837 goto f_err; 838 } 839 } 840 s->s3->tmp.new_cipher=c; 841 842 /* lets get the compression algorithm */ 843 /* COMPRESSION */ 844#ifdef OPENSSL_NO_COMP 845 if (*(p++) != 0) 846 { 847 al=SSL_AD_ILLEGAL_PARAMETER; 848 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); 849 goto f_err; 850 } 851#else 852 j= *(p++); 853 if (j == 0) 854 comp=NULL; 855 else 856 comp=ssl3_comp_find(s->ctx->comp_methods,j); 857 858 if ((j != 0) && (comp == NULL)) 859 { 860 al=SSL_AD_ILLEGAL_PARAMETER; 861 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); 862 goto f_err; 863 } 864 else 865 { 866 s->s3->tmp.new_compression=comp; 867 } 868#endif 869#ifndef OPENSSL_NO_TLSEXT 870 /* TLS extensions*/ 871 if (s->version >= SSL3_VERSION) 872 { 873 if (!ssl_parse_serverhello_tlsext(s,&p,d,n, &al)) 874 { 875 /* 'al' set by ssl_parse_serverhello_tlsext */ 876 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT); 877 goto f_err; 878 } 879 if (ssl_check_serverhello_tlsext(s) <= 0) 880 { 881 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SERVERHELLO_TLSEXT); 882 goto err; 883 } 884 } 885#endif 886 887 888 if (p != (d+n)) 889 { 890 /* wrong packet length */ 891 al=SSL_AD_DECODE_ERROR; 892 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH); 893 goto f_err; 894 } 895 896 return(1); 897f_err: 898 ssl3_send_alert(s,SSL3_AL_FATAL,al); 899#ifndef OPENSSL_NO_TLSEXT 900err: 901#endif 902 return(-1); 903 } 904 905int ssl3_get_server_certificate(SSL *s) 906 { 907 int al,i,ok,ret= -1; 908 unsigned long n,nc,llen,l; 909 X509 *x=NULL; 910 const unsigned char *q,*p; 911 unsigned char *d; 912 STACK_OF(X509) *sk=NULL; 913 SESS_CERT *sc; 914 EVP_PKEY *pkey=NULL; 915 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */ 916 917 n=s->method->ssl_get_message(s, 918 SSL3_ST_CR_CERT_A, 919 SSL3_ST_CR_CERT_B, 920 -1, 921 s->max_cert_list, 922 &ok); 923 924 if (!ok) return((int)n); 925 926 if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) || 927 ((s->s3->tmp.new_cipher->algorithms & SSL_aKRB5) && 928 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE))) 929 { 930 s->s3->tmp.reuse_message=1; 931 return(1); 932 } 933 934 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE) 935 { 936 al=SSL_AD_UNEXPECTED_MESSAGE; 937 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE); 938 goto f_err; 939 } 940 p=d=(unsigned char *)s->init_msg; 941 942 if ((sk=sk_X509_new_null()) == NULL) 943 { 944 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE); 945 goto err; 946 } 947 948 n2l3(p,llen); 949 if (llen+3 != n) 950 { 951 al=SSL_AD_DECODE_ERROR; 952 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH); 953 goto f_err; 954 } 955 for (nc=0; nc<llen; ) 956 { 957 n2l3(p,l); 958 if ((l+nc+3) > llen) 959 { 960 al=SSL_AD_DECODE_ERROR; 961 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); 962 goto f_err; 963 } 964 965 q=p; 966 x=d2i_X509(NULL,&q,l); 967 if (x == NULL) 968 { 969 al=SSL_AD_BAD_CERTIFICATE; 970 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB); 971 goto f_err; 972 } 973 if (q != (p+l)) 974 { 975 al=SSL_AD_DECODE_ERROR; 976 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); 977 goto f_err; 978 } 979 if (!sk_X509_push(sk,x)) 980 { 981 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE); 982 goto err; 983 } 984 x=NULL; 985 nc+=l+3; 986 p=q; 987 } 988 989 i=ssl_verify_cert_chain(s,sk); 990 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0) 991#ifndef OPENSSL_NO_KRB5 992 && (s->s3->tmp.new_cipher->algorithms & (SSL_MKEY_MASK|SSL_AUTH_MASK)) 993 != (SSL_aKRB5|SSL_kKRB5) 994#endif /* OPENSSL_NO_KRB5 */ 995 ) 996 { 997 al=ssl_verify_alarm_type(s->verify_result); 998 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED); 999 goto f_err; 1000 } 1001 ERR_clear_error(); /* but we keep s->verify_result */ 1002 1003 sc=ssl_sess_cert_new(); 1004 if (sc == NULL) goto err; 1005 1006 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert); 1007 s->session->sess_cert=sc; 1008 1009 sc->cert_chain=sk; 1010 /* Inconsistency alert: cert_chain does include the peer's 1011 * certificate, which we don't include in s3_srvr.c */ 1012 x=sk_X509_value(sk,0); 1013 sk=NULL; 1014 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/ 1015 1016 pkey=X509_get_pubkey(x); 1017 1018 /* VRS: allow null cert if auth == KRB5 */ 1019 need_cert = ((s->s3->tmp.new_cipher->algorithms 1020 & (SSL_MKEY_MASK|SSL_AUTH_MASK)) 1021 == (SSL_aKRB5|SSL_kKRB5))? 0: 1; 1022 1023#ifdef KSSL_DEBUG 1024 printf("pkey,x = %p, %p\n", (void *)pkey,(void *)x); 1025 printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey)); 1026 printf("cipher, alg, nc = %s, %lx, %d\n", s->s3->tmp.new_cipher->name, 1027 s->s3->tmp.new_cipher->algorithms, need_cert); 1028#endif /* KSSL_DEBUG */ 1029 1030 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey))) 1031 { 1032 x=NULL; 1033 al=SSL3_AL_FATAL; 1034 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 1035 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); 1036 goto f_err; 1037 } 1038 1039 i=ssl_cert_type(x,pkey); 1040 if (need_cert && i < 0) 1041 { 1042 x=NULL; 1043 al=SSL3_AL_FATAL; 1044 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 1045 SSL_R_UNKNOWN_CERTIFICATE_TYPE); 1046 goto f_err; 1047 } 1048 1049 if (need_cert) 1050 { 1051 sc->peer_cert_type=i; 1052 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509); 1053 /* Why would the following ever happen? 1054 * We just created sc a couple of lines ago. */ 1055 if (sc->peer_pkeys[i].x509 != NULL) 1056 X509_free(sc->peer_pkeys[i].x509); 1057 sc->peer_pkeys[i].x509=x; 1058 sc->peer_key= &(sc->peer_pkeys[i]); 1059 1060 if (s->session->peer != NULL) 1061 X509_free(s->session->peer); 1062 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509); 1063 s->session->peer=x; 1064 } 1065 else 1066 { 1067 sc->peer_cert_type=i; 1068 sc->peer_key= NULL; 1069 1070 if (s->session->peer != NULL) 1071 X509_free(s->session->peer); 1072 s->session->peer=NULL; 1073 } 1074 s->session->verify_result = s->verify_result; 1075 1076 x=NULL; 1077 ret=1; 1078 1079 if (0) 1080 { 1081f_err: 1082 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1083 } 1084err: 1085 EVP_PKEY_free(pkey); 1086 X509_free(x); 1087 sk_X509_pop_free(sk,X509_free); 1088 return(ret); 1089 } 1090 1091int ssl3_get_key_exchange(SSL *s) 1092 { 1093#ifndef OPENSSL_NO_RSA 1094 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2]; 1095#endif 1096 EVP_MD_CTX md_ctx; 1097 unsigned char *param,*p; 1098 int al,j,ok; 1099 long i,param_len,n,alg; 1100 EVP_PKEY *pkey=NULL; 1101#ifndef OPENSSL_NO_RSA 1102 RSA *rsa=NULL; 1103#endif 1104#ifndef OPENSSL_NO_DH 1105 DH *dh=NULL; 1106#endif 1107#ifndef OPENSSL_NO_ECDH 1108 EC_KEY *ecdh = NULL; 1109 BN_CTX *bn_ctx = NULL; 1110 EC_POINT *srvr_ecpoint = NULL; 1111 int curve_nid = 0; 1112 int encoded_pt_len = 0; 1113#endif 1114 1115 /* use same message size as in ssl3_get_certificate_request() 1116 * as ServerKeyExchange message may be skipped */ 1117 n=s->method->ssl_get_message(s, 1118 SSL3_ST_CR_KEY_EXCH_A, 1119 SSL3_ST_CR_KEY_EXCH_B, 1120 -1, 1121 s->max_cert_list, 1122 &ok); 1123 1124 if (!ok) return((int)n); 1125 1126 alg=s->s3->tmp.new_cipher->algorithms; 1127 EVP_MD_CTX_init(&md_ctx); 1128 1129 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE) 1130 { 1131 /* 1132 * Can't skip server key exchange if this is an ephemeral 1133 * ciphersuite. 1134 */ 1135 if (alg & (SSL_kEDH|SSL_kECDHE)) 1136 { 1137 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); 1138 al = SSL_AD_UNEXPECTED_MESSAGE; 1139 goto f_err; 1140 } 1141 s->s3->tmp.reuse_message=1; 1142 return(1); 1143 } 1144 1145 param=p=(unsigned char *)s->init_msg; 1146 1147 if (s->session->sess_cert != NULL) 1148 { 1149#ifndef OPENSSL_NO_RSA 1150 if (s->session->sess_cert->peer_rsa_tmp != NULL) 1151 { 1152 RSA_free(s->session->sess_cert->peer_rsa_tmp); 1153 s->session->sess_cert->peer_rsa_tmp=NULL; 1154 } 1155#endif 1156#ifndef OPENSSL_NO_DH 1157 if (s->session->sess_cert->peer_dh_tmp) 1158 { 1159 DH_free(s->session->sess_cert->peer_dh_tmp); 1160 s->session->sess_cert->peer_dh_tmp=NULL; 1161 } 1162#endif 1163#ifndef OPENSSL_NO_ECDH 1164 if (s->session->sess_cert->peer_ecdh_tmp) 1165 { 1166 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp); 1167 s->session->sess_cert->peer_ecdh_tmp=NULL; 1168 } 1169#endif 1170 } 1171 else 1172 { 1173 s->session->sess_cert=ssl_sess_cert_new(); 1174 } 1175 1176 /* Total length of the parameters including the length prefix */ 1177 param_len=0; 1178 1179 al=SSL_AD_DECODE_ERROR; 1180#ifndef OPENSSL_NO_RSA 1181 if (alg & SSL_kRSA) 1182 { 1183 /* Temporary RSA keys only allowed in export ciphersuites */ 1184 if (!SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)) 1185 { 1186 al=SSL_AD_UNEXPECTED_MESSAGE; 1187 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE); 1188 goto f_err; 1189 } 1190 if ((rsa=RSA_new()) == NULL) 1191 { 1192 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1193 goto err; 1194 } 1195 1196 param_len = 2; 1197 if (param_len > n) 1198 { 1199 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1200 SSL_R_LENGTH_TOO_SHORT); 1201 goto f_err; 1202 } 1203 n2s(p,i); 1204 1205 if (i > n - param_len) 1206 { 1207 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH); 1208 goto f_err; 1209 } 1210 param_len += i; 1211 1212 if (!(rsa->n=BN_bin2bn(p,i,rsa->n))) 1213 { 1214 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1215 goto err; 1216 } 1217 p+=i; 1218 1219 if (2 > n - param_len) 1220 { 1221 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1222 SSL_R_LENGTH_TOO_SHORT); 1223 goto f_err; 1224 } 1225 param_len += 2; 1226 1227 n2s(p,i); 1228 1229 if (i > n - param_len) 1230 { 1231 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH); 1232 goto f_err; 1233 } 1234 param_len += i; 1235 1236 if (!(rsa->e=BN_bin2bn(p,i,rsa->e))) 1237 { 1238 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1239 goto err; 1240 } 1241 p+=i; 1242 n-=param_len; 1243 1244 /* this should be because we are using an export cipher */ 1245 if (alg & SSL_aRSA) 1246 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1247 else 1248 { 1249 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1250 goto err; 1251 } 1252 s->session->sess_cert->peer_rsa_tmp=rsa; 1253 rsa=NULL; 1254 } 1255#else /* OPENSSL_NO_RSA */ 1256 if (0) 1257 ; 1258#endif 1259#ifndef OPENSSL_NO_DH 1260 else if (alg & SSL_kEDH) 1261 { 1262 if ((dh=DH_new()) == NULL) 1263 { 1264 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB); 1265 goto err; 1266 } 1267 1268 param_len = 2; 1269 if (param_len > n) 1270 { 1271 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1272 SSL_R_LENGTH_TOO_SHORT); 1273 goto f_err; 1274 } 1275 n2s(p,i); 1276 1277 if (i > n - param_len) 1278 { 1279 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH); 1280 goto f_err; 1281 } 1282 param_len += i; 1283 1284 if (!(dh->p=BN_bin2bn(p,i,NULL))) 1285 { 1286 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1287 goto err; 1288 } 1289 p+=i; 1290 1291 if (2 > n - param_len) 1292 { 1293 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1294 SSL_R_LENGTH_TOO_SHORT); 1295 goto f_err; 1296 } 1297 param_len += 2; 1298 1299 n2s(p,i); 1300 1301 if (i > n - param_len) 1302 { 1303 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH); 1304 goto f_err; 1305 } 1306 param_len += i; 1307 1308 if (!(dh->g=BN_bin2bn(p,i,NULL))) 1309 { 1310 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1311 goto err; 1312 } 1313 p+=i; 1314 1315 if (2 > n - param_len) 1316 { 1317 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1318 SSL_R_LENGTH_TOO_SHORT); 1319 goto f_err; 1320 } 1321 param_len += 2; 1322 1323 n2s(p,i); 1324 1325 if (i > n - param_len) 1326 { 1327 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH); 1328 goto f_err; 1329 } 1330 param_len += i; 1331 1332 if (!(dh->pub_key=BN_bin2bn(p,i,NULL))) 1333 { 1334 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1335 goto err; 1336 } 1337 p+=i; 1338 n-=param_len; 1339 1340#ifndef OPENSSL_NO_RSA 1341 if (alg & SSL_aRSA) 1342 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1343#else 1344 if (0) 1345 ; 1346#endif 1347#ifndef OPENSSL_NO_DSA 1348 else if (alg & SSL_aDSS) 1349 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509); 1350#endif 1351 /* else anonymous DH, so no certificate or pkey. */ 1352 1353 s->session->sess_cert->peer_dh_tmp=dh; 1354 dh=NULL; 1355 } 1356 else if ((alg & SSL_kDHr) || (alg & SSL_kDHd)) 1357 { 1358 al=SSL_AD_ILLEGAL_PARAMETER; 1359 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER); 1360 goto f_err; 1361 } 1362#endif /* !OPENSSL_NO_DH */ 1363 1364#ifndef OPENSSL_NO_ECDH 1365 else if (alg & SSL_kECDHE) 1366 { 1367 EC_GROUP *ngroup; 1368 const EC_GROUP *group; 1369 1370 if ((ecdh=EC_KEY_new()) == NULL) 1371 { 1372 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1373 goto err; 1374 } 1375 1376 /* Extract elliptic curve parameters and the 1377 * server's ephemeral ECDH public key. 1378 * Keep accumulating lengths of various components in 1379 * param_len and make sure it never exceeds n. 1380 */ 1381 1382 /* XXX: For now we only support named (not generic) curves 1383 * and the ECParameters in this case is just three bytes. We 1384 * also need one byte for the length of the encoded point 1385 */ 1386 param_len=4; 1387 if (param_len > n) 1388 { 1389 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1390 SSL_R_LENGTH_TOO_SHORT); 1391 goto f_err; 1392 } 1393 1394 if ((*p != NAMED_CURVE_TYPE) || 1395 ((curve_nid = curve_id2nid(*(p + 2))) == 0)) 1396 { 1397 al=SSL_AD_INTERNAL_ERROR; 1398 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); 1399 goto f_err; 1400 } 1401 1402 ngroup = EC_GROUP_new_by_curve_name(curve_nid); 1403 if (ngroup == NULL) 1404 { 1405 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB); 1406 goto err; 1407 } 1408 if (EC_KEY_set_group(ecdh, ngroup) == 0) 1409 { 1410 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB); 1411 goto err; 1412 } 1413 EC_GROUP_free(ngroup); 1414 1415 group = EC_KEY_get0_group(ecdh); 1416 1417 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && 1418 (EC_GROUP_get_degree(group) > 163)) 1419 { 1420 al=SSL_AD_EXPORT_RESTRICTION; 1421 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER); 1422 goto f_err; 1423 } 1424 1425 p+=3; 1426 1427 /* Next, get the encoded ECPoint */ 1428 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) || 1429 ((bn_ctx = BN_CTX_new()) == NULL)) 1430 { 1431 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1432 goto err; 1433 } 1434 1435 encoded_pt_len = *p; /* length of encoded point */ 1436 p+=1; 1437 1438 if ((encoded_pt_len > n - param_len) || 1439 (EC_POINT_oct2point(group, srvr_ecpoint, 1440 p, encoded_pt_len, bn_ctx) == 0)) 1441 { 1442 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT); 1443 goto f_err; 1444 } 1445 param_len += encoded_pt_len; 1446 1447 n-=param_len; 1448 p+=encoded_pt_len; 1449 1450 /* The ECC/TLS specification does not mention 1451 * the use of DSA to sign ECParameters in the server 1452 * key exchange message. We do support RSA and ECDSA. 1453 */ 1454 if (0) ; 1455#ifndef OPENSSL_NO_RSA 1456 else if (alg & SSL_aRSA) 1457 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1458#endif 1459#ifndef OPENSSL_NO_ECDSA 1460 else if (alg & SSL_aECDSA) 1461 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509); 1462#endif 1463 /* else anonymous ECDH, so no certificate or pkey. */ 1464 EC_KEY_set_public_key(ecdh, srvr_ecpoint); 1465 s->session->sess_cert->peer_ecdh_tmp=ecdh; 1466 ecdh=NULL; 1467 BN_CTX_free(bn_ctx); 1468 bn_ctx = NULL; 1469 EC_POINT_free(srvr_ecpoint); 1470 srvr_ecpoint = NULL; 1471 } 1472 else if (alg & SSL_kECDH) 1473 { 1474 al=SSL_AD_UNEXPECTED_MESSAGE; 1475 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE); 1476 goto f_err; 1477 } 1478#endif /* !OPENSSL_NO_ECDH */ 1479 if (alg & SSL_aFZA) 1480 { 1481 al=SSL_AD_HANDSHAKE_FAILURE; 1482 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER); 1483 goto f_err; 1484 } 1485 1486 1487 /* p points to the next byte, there are 'n' bytes left */ 1488 1489 /* if it was signed, check the signature */ 1490 if (pkey != NULL) 1491 { 1492 n2s(p,i); 1493 n-=2; 1494 j=EVP_PKEY_size(pkey); 1495 1496 /* Check signature length. If n is 0 then signature is empty */ 1497 if ((i != n) || (n > j) || (n <= 0)) 1498 { 1499 /* wrong packet length */ 1500 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH); 1501 goto f_err; 1502 } 1503 1504#ifndef OPENSSL_NO_RSA 1505 if (pkey->type == EVP_PKEY_RSA) 1506 { 1507 int num; 1508 unsigned int size; 1509 1510 j=0; 1511 q=md_buf; 1512 for (num=2; num > 0; num--) 1513 { 1514 EVP_MD_CTX_set_flags(&md_ctx, 1515 EVP_MD_CTX_FLAG_NON_FIPS_ALLOW); 1516 EVP_DigestInit_ex(&md_ctx,(num == 2) 1517 ?s->ctx->md5:s->ctx->sha1, NULL); 1518 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); 1519 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); 1520 EVP_DigestUpdate(&md_ctx,param,param_len); 1521 EVP_DigestFinal_ex(&md_ctx,q,&size); 1522 q+=size; 1523 j+=size; 1524 } 1525 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n, 1526 pkey->pkey.rsa); 1527 if (i < 0) 1528 { 1529 al=SSL_AD_DECRYPT_ERROR; 1530 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT); 1531 goto f_err; 1532 } 1533 if (i == 0) 1534 { 1535 /* bad signature */ 1536 al=SSL_AD_DECRYPT_ERROR; 1537 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE); 1538 goto f_err; 1539 } 1540 } 1541 else 1542#endif 1543#ifndef OPENSSL_NO_DSA 1544 if (pkey->type == EVP_PKEY_DSA) 1545 { 1546 /* lets do DSS */ 1547 EVP_VerifyInit_ex(&md_ctx,EVP_dss1(), NULL); 1548 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); 1549 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); 1550 EVP_VerifyUpdate(&md_ctx,param,param_len); 1551 if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0) 1552 { 1553 /* bad signature */ 1554 al=SSL_AD_DECRYPT_ERROR; 1555 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE); 1556 goto f_err; 1557 } 1558 } 1559 else 1560#endif 1561#ifndef OPENSSL_NO_ECDSA 1562 if (pkey->type == EVP_PKEY_EC) 1563 { 1564 /* let's do ECDSA */ 1565 EVP_VerifyInit_ex(&md_ctx,EVP_ecdsa(), NULL); 1566 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); 1567 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); 1568 EVP_VerifyUpdate(&md_ctx,param,param_len); 1569 if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0) 1570 { 1571 /* bad signature */ 1572 al=SSL_AD_DECRYPT_ERROR; 1573 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE); 1574 goto f_err; 1575 } 1576 } 1577 else 1578#endif 1579 { 1580 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1581 goto err; 1582 } 1583 } 1584 else 1585 { 1586 /* still data left over */ 1587 if (!(alg & SSL_aNULL)) 1588 { 1589 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1590 goto err; 1591 } 1592 if (n != 0) 1593 { 1594 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE); 1595 goto f_err; 1596 } 1597 } 1598 EVP_PKEY_free(pkey); 1599 EVP_MD_CTX_cleanup(&md_ctx); 1600 return(1); 1601f_err: 1602 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1603err: 1604 EVP_PKEY_free(pkey); 1605#ifndef OPENSSL_NO_RSA 1606 if (rsa != NULL) 1607 RSA_free(rsa); 1608#endif 1609#ifndef OPENSSL_NO_DH 1610 if (dh != NULL) 1611 DH_free(dh); 1612#endif 1613#ifndef OPENSSL_NO_ECDH 1614 BN_CTX_free(bn_ctx); 1615 EC_POINT_free(srvr_ecpoint); 1616 if (ecdh != NULL) 1617 EC_KEY_free(ecdh); 1618#endif 1619 EVP_MD_CTX_cleanup(&md_ctx); 1620 return(-1); 1621 } 1622 1623int ssl3_get_certificate_request(SSL *s) 1624 { 1625 int ok,ret=0; 1626 unsigned long n,nc,l; 1627 unsigned int llen,ctype_num,i; 1628 X509_NAME *xn=NULL; 1629 const unsigned char *p,*q; 1630 unsigned char *d; 1631 STACK_OF(X509_NAME) *ca_sk=NULL; 1632 1633 n=s->method->ssl_get_message(s, 1634 SSL3_ST_CR_CERT_REQ_A, 1635 SSL3_ST_CR_CERT_REQ_B, 1636 -1, 1637 s->max_cert_list, 1638 &ok); 1639 1640 if (!ok) return((int)n); 1641 1642 s->s3->tmp.cert_req=0; 1643 1644 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE) 1645 { 1646 s->s3->tmp.reuse_message=1; 1647 return(1); 1648 } 1649 1650 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST) 1651 { 1652 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 1653 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE); 1654 goto err; 1655 } 1656 1657 /* TLS does not like anon-DH with client cert */ 1658 if (s->version > SSL3_VERSION) 1659 { 1660 l=s->s3->tmp.new_cipher->algorithms; 1661 if (l & SSL_aNULL) 1662 { 1663 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 1664 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER); 1665 goto err; 1666 } 1667 } 1668 1669 p=d=(unsigned char *)s->init_msg; 1670 1671 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL) 1672 { 1673 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE); 1674 goto err; 1675 } 1676 1677 /* get the certificate types */ 1678 ctype_num= *(p++); 1679 if (ctype_num > SSL3_CT_NUMBER) 1680 ctype_num=SSL3_CT_NUMBER; 1681 for (i=0; i<ctype_num; i++) 1682 s->s3->tmp.ctype[i]= p[i]; 1683 p+=ctype_num; 1684 1685 /* get the CA RDNs */ 1686 n2s(p,llen); 1687#if 0 1688{ 1689FILE *out; 1690out=fopen("/tmp/vsign.der","w"); 1691fwrite(p,1,llen,out); 1692fclose(out); 1693} 1694#endif 1695 1696 if ((llen+ctype_num+2+1) != n) 1697 { 1698 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1699 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH); 1700 goto err; 1701 } 1702 1703 for (nc=0; nc<llen; ) 1704 { 1705 n2s(p,l); 1706 if ((l+nc+2) > llen) 1707 { 1708 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG)) 1709 goto cont; /* netscape bugs */ 1710 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1711 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG); 1712 goto err; 1713 } 1714 1715 q=p; 1716 1717 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL) 1718 { 1719 /* If netscape tolerance is on, ignore errors */ 1720 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG) 1721 goto cont; 1722 else 1723 { 1724 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1725 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB); 1726 goto err; 1727 } 1728 } 1729 1730 if (q != (p+l)) 1731 { 1732 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1733 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH); 1734 goto err; 1735 } 1736 if (!sk_X509_NAME_push(ca_sk,xn)) 1737 { 1738 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE); 1739 goto err; 1740 } 1741 1742 p+=l; 1743 nc+=l+2; 1744 } 1745 1746 if (0) 1747 { 1748cont: 1749 ERR_clear_error(); 1750 } 1751 1752 /* we should setup a certificate to return.... */ 1753 s->s3->tmp.cert_req=1; 1754 s->s3->tmp.ctype_num=ctype_num; 1755 if (s->s3->tmp.ca_names != NULL) 1756 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free); 1757 s->s3->tmp.ca_names=ca_sk; 1758 ca_sk=NULL; 1759 1760 ret=1; 1761err: 1762 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free); 1763 return(ret); 1764 } 1765 1766static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b) 1767 { 1768 return(X509_NAME_cmp(*a,*b)); 1769 } 1770#ifndef OPENSSL_NO_TLSEXT 1771int ssl3_get_new_session_ticket(SSL *s) 1772 { 1773 int ok,al,ret=0, ticklen; 1774 long n; 1775 const unsigned char *p; 1776 unsigned char *d; 1777 1778 n=s->method->ssl_get_message(s, 1779 SSL3_ST_CR_SESSION_TICKET_A, 1780 SSL3_ST_CR_SESSION_TICKET_B, 1781 -1, 1782 16384, 1783 &ok); 1784 1785 if (!ok) 1786 return((int)n); 1787 1788 if (s->s3->tmp.message_type == SSL3_MT_FINISHED) 1789 { 1790 s->s3->tmp.reuse_message=1; 1791 return(1); 1792 } 1793 if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET) 1794 { 1795 al=SSL_AD_UNEXPECTED_MESSAGE; 1796 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_BAD_MESSAGE_TYPE); 1797 goto f_err; 1798 } 1799 if (n < 6) 1800 { 1801 /* need at least ticket_lifetime_hint + ticket length */ 1802 al = SSL_AD_DECODE_ERROR; 1803 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH); 1804 goto f_err; 1805 } 1806 1807 p=d=(unsigned char *)s->init_msg; 1808 1809 if (s->session->session_id_length > 0) { 1810 int i = s->session_ctx->session_cache_mode; 1811 SSL_SESSION *new_sess; 1812 /* 1813 * We reused an existing session, so we need to replace it with a new 1814 * one 1815 */ 1816 if (i & SSL_SESS_CACHE_CLIENT) { 1817 /* 1818 * Remove the old session from the cache 1819 */ 1820 if (i & SSL_SESS_CACHE_NO_INTERNAL_STORE) { 1821 if (s->session_ctx->remove_session_cb != NULL) 1822 s->session_ctx->remove_session_cb(s->session_ctx, 1823 s->session); 1824 } else { 1825 /* We carry on if this fails */ 1826 SSL_CTX_remove_session(s->session_ctx, s->session); 1827 } 1828 } 1829 1830 if ((new_sess = ssl_session_dup(s->session, 0)) == 0) { 1831 al = SSL_AD_INTERNAL_ERROR; 1832 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); 1833 goto f_err; 1834 } 1835 1836 SSL_SESSION_free(s->session); 1837 s->session = new_sess; 1838 } 1839 1840 n2l(p, s->session->tlsext_tick_lifetime_hint); 1841 n2s(p, ticklen); 1842 /* ticket_lifetime_hint + ticket_length + ticket */ 1843 if (ticklen + 6 != n) 1844 { 1845 al = SSL_AD_DECODE_ERROR; 1846 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH); 1847 goto f_err; 1848 } 1849 if (s->session->tlsext_tick) 1850 { 1851 OPENSSL_free(s->session->tlsext_tick); 1852 s->session->tlsext_ticklen = 0; 1853 } 1854 s->session->tlsext_tick = OPENSSL_malloc(ticklen); 1855 if (!s->session->tlsext_tick) 1856 { 1857 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE); 1858 goto err; 1859 } 1860 memcpy(s->session->tlsext_tick, p, ticklen); 1861 s->session->tlsext_ticklen = ticklen; 1862 /* There are two ways to detect a resumed ticket sesion. 1863 * One is to set an appropriate session ID and then the server 1864 * must return a match in ServerHello. This allows the normal 1865 * client session ID matching to work and we know much 1866 * earlier that the ticket has been accepted. 1867 * 1868 * The other way is to set zero length session ID when the 1869 * ticket is presented and rely on the handshake to determine 1870 * session resumption. 1871 * 1872 * We choose the former approach because this fits in with 1873 * assumptions elsewhere in OpenSSL. The session ID is set 1874 * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the 1875 * ticket. 1876 */ 1877 EVP_Digest(p, ticklen, 1878 s->session->session_id, &s->session->session_id_length, 1879#ifndef OPENSSL_NO_SHA256 1880 EVP_sha256(), NULL); 1881#else 1882 EVP_sha1(), NULL); 1883#endif 1884 ret=1; 1885 return(ret); 1886f_err: 1887 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1888err: 1889 return(-1); 1890 } 1891 1892int ssl3_get_cert_status(SSL *s) 1893 { 1894 int ok, al; 1895 unsigned long resplen; 1896 long n; 1897 const unsigned char *p; 1898 1899 n=s->method->ssl_get_message(s, 1900 SSL3_ST_CR_CERT_STATUS_A, 1901 SSL3_ST_CR_CERT_STATUS_B, 1902 SSL3_MT_CERTIFICATE_STATUS, 1903 16384, 1904 &ok); 1905 1906 if (!ok) return((int)n); 1907 if (n < 4) 1908 { 1909 /* need at least status type + length */ 1910 al = SSL_AD_DECODE_ERROR; 1911 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH); 1912 goto f_err; 1913 } 1914 p = (unsigned char *)s->init_msg; 1915 if (*p++ != TLSEXT_STATUSTYPE_ocsp) 1916 { 1917 al = SSL_AD_DECODE_ERROR; 1918 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_UNSUPPORTED_STATUS_TYPE); 1919 goto f_err; 1920 } 1921 n2l3(p, resplen); 1922 if (resplen + 4 != (unsigned long)n) 1923 { 1924 al = SSL_AD_DECODE_ERROR; 1925 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH); 1926 goto f_err; 1927 } 1928 if (s->tlsext_ocsp_resp) 1929 OPENSSL_free(s->tlsext_ocsp_resp); 1930 s->tlsext_ocsp_resp = BUF_memdup(p, resplen); 1931 if (!s->tlsext_ocsp_resp) 1932 { 1933 al = SSL_AD_INTERNAL_ERROR; 1934 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE); 1935 goto f_err; 1936 } 1937 s->tlsext_ocsp_resplen = resplen; 1938 if (s->ctx->tlsext_status_cb) 1939 { 1940 int ret; 1941 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg); 1942 if (ret == 0) 1943 { 1944 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE; 1945 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_INVALID_STATUS_RESPONSE); 1946 goto f_err; 1947 } 1948 if (ret < 0) 1949 { 1950 al = SSL_AD_INTERNAL_ERROR; 1951 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE); 1952 goto f_err; 1953 } 1954 } 1955 return 1; 1956f_err: 1957 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1958 return(-1); 1959 } 1960#endif 1961 1962int ssl3_get_server_done(SSL *s) 1963 { 1964 int ok,ret=0; 1965 long n; 1966 1967 n=s->method->ssl_get_message(s, 1968 SSL3_ST_CR_SRVR_DONE_A, 1969 SSL3_ST_CR_SRVR_DONE_B, 1970 SSL3_MT_SERVER_DONE, 1971 30, /* should be very small, like 0 :-) */ 1972 &ok); 1973 1974 if (!ok) return((int)n); 1975 if (n > 0) 1976 { 1977 /* should contain no data */ 1978 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1979 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH); 1980 return -1; 1981 } 1982 ret=1; 1983 return(ret); 1984 } 1985 1986 1987int ssl3_send_client_key_exchange(SSL *s) 1988 { 1989 unsigned char *p,*d; 1990 int n; 1991 unsigned long l; 1992#ifndef OPENSSL_NO_RSA 1993 unsigned char *q; 1994 EVP_PKEY *pkey=NULL; 1995#endif 1996#ifndef OPENSSL_NO_KRB5 1997 KSSL_ERR kssl_err; 1998#endif /* OPENSSL_NO_KRB5 */ 1999#ifndef OPENSSL_NO_ECDH 2000 EC_KEY *clnt_ecdh = NULL; 2001 const EC_POINT *srvr_ecpoint = NULL; 2002 EVP_PKEY *srvr_pub_pkey = NULL; 2003 unsigned char *encodedPoint = NULL; 2004 int encoded_pt_len = 0; 2005 BN_CTX * bn_ctx = NULL; 2006#endif 2007 2008 if (s->state == SSL3_ST_CW_KEY_EXCH_A) 2009 { 2010 d=(unsigned char *)s->init_buf->data; 2011 p= &(d[4]); 2012 2013 l=s->s3->tmp.new_cipher->algorithms; 2014 2015 /* Fool emacs indentation */ 2016 if (0) {} 2017#ifndef OPENSSL_NO_RSA 2018 else if (l & SSL_kRSA) 2019 { 2020 RSA *rsa; 2021 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; 2022 2023 if (s->session->sess_cert == NULL) 2024 { 2025 /* We should always have a server certificate with SSL_kRSA. */ 2026 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 2027 goto err; 2028 } 2029 2030 if (s->session->sess_cert->peer_rsa_tmp != NULL) 2031 rsa=s->session->sess_cert->peer_rsa_tmp; 2032 else 2033 { 2034 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 2035 if ((pkey == NULL) || 2036 (pkey->type != EVP_PKEY_RSA) || 2037 (pkey->pkey.rsa == NULL)) 2038 { 2039 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 2040 goto err; 2041 } 2042 rsa=pkey->pkey.rsa; 2043 EVP_PKEY_free(pkey); 2044 } 2045 2046 tmp_buf[0]=s->client_version>>8; 2047 tmp_buf[1]=s->client_version&0xff; 2048 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0) 2049 goto err; 2050 2051 s->session->master_key_length=sizeof tmp_buf; 2052 2053 q=p; 2054 /* Fix buf for TLS and beyond */ 2055 if (s->version > SSL3_VERSION) 2056 p+=2; 2057 n=RSA_public_encrypt(sizeof tmp_buf, 2058 tmp_buf,p,rsa,RSA_PKCS1_PADDING); 2059#ifdef PKCS1_CHECK 2060 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++; 2061 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70; 2062#endif 2063 if (n <= 0) 2064 { 2065 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT); 2066 goto err; 2067 } 2068 2069 /* Fix buf for TLS and beyond */ 2070 if (s->version > SSL3_VERSION) 2071 { 2072 s2n(n,q); 2073 n+=2; 2074 } 2075 2076 s->session->master_key_length= 2077 s->method->ssl3_enc->generate_master_secret(s, 2078 s->session->master_key, 2079 tmp_buf,sizeof tmp_buf); 2080 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf); 2081 } 2082#endif 2083#ifndef OPENSSL_NO_KRB5 2084 else if (l & SSL_kKRB5) 2085 { 2086 krb5_error_code krb5rc; 2087 KSSL_CTX *kssl_ctx = s->kssl_ctx; 2088 /* krb5_data krb5_ap_req; */ 2089 krb5_data *enc_ticket; 2090 krb5_data authenticator, *authp = NULL; 2091 EVP_CIPHER_CTX ciph_ctx; 2092 EVP_CIPHER *enc = NULL; 2093 unsigned char iv[EVP_MAX_IV_LENGTH]; 2094 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; 2095 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH 2096 + EVP_MAX_IV_LENGTH]; 2097 int padl, outl = sizeof(epms); 2098 2099 EVP_CIPHER_CTX_init(&ciph_ctx); 2100 2101#ifdef KSSL_DEBUG 2102 printf("ssl3_send_client_key_exchange(%lx & %lx)\n", 2103 l, SSL_kKRB5); 2104#endif /* KSSL_DEBUG */ 2105 2106 authp = NULL; 2107#ifdef KRB5SENDAUTH 2108 if (KRB5SENDAUTH) authp = &authenticator; 2109#endif /* KRB5SENDAUTH */ 2110 2111 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp, 2112 &kssl_err); 2113 enc = kssl_map_enc(kssl_ctx->enctype); 2114 if (enc == NULL) 2115 goto err; 2116#ifdef KSSL_DEBUG 2117 { 2118 printf("kssl_cget_tkt rtn %d\n", krb5rc); 2119 if (krb5rc && kssl_err.text) 2120 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text); 2121 } 2122#endif /* KSSL_DEBUG */ 2123 2124 if (krb5rc) 2125 { 2126 ssl3_send_alert(s,SSL3_AL_FATAL, 2127 SSL_AD_HANDSHAKE_FAILURE); 2128 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2129 kssl_err.reason); 2130 goto err; 2131 } 2132 2133 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ 2134 ** in place of RFC 2712 KerberosWrapper, as in: 2135 ** 2136 ** Send ticket (copy to *p, set n = length) 2137 ** n = krb5_ap_req.length; 2138 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length); 2139 ** if (krb5_ap_req.data) 2140 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req); 2141 ** 2142 ** Now using real RFC 2712 KerberosWrapper 2143 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>) 2144 ** Note: 2712 "opaque" types are here replaced 2145 ** with a 2-byte length followed by the value. 2146 ** Example: 2147 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms 2148 ** Where "xx xx" = length bytes. Shown here with 2149 ** optional authenticator omitted. 2150 */ 2151 2152 /* KerberosWrapper.Ticket */ 2153 s2n(enc_ticket->length,p); 2154 memcpy(p, enc_ticket->data, enc_ticket->length); 2155 p+= enc_ticket->length; 2156 n = enc_ticket->length + 2; 2157 2158 /* KerberosWrapper.Authenticator */ 2159 if (authp && authp->length) 2160 { 2161 s2n(authp->length,p); 2162 memcpy(p, authp->data, authp->length); 2163 p+= authp->length; 2164 n+= authp->length + 2; 2165 2166 free(authp->data); 2167 authp->data = NULL; 2168 authp->length = 0; 2169 } 2170 else 2171 { 2172 s2n(0,p);/* null authenticator length */ 2173 n+=2; 2174 } 2175 2176 tmp_buf[0]=s->client_version>>8; 2177 tmp_buf[1]=s->client_version&0xff; 2178 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0) 2179 goto err; 2180 2181 /* 20010420 VRS. Tried it this way; failed. 2182 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL); 2183 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx, 2184 ** kssl_ctx->length); 2185 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv); 2186 */ 2187 2188 memset(iv, 0, sizeof iv); /* per RFC 1510 */ 2189 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL, 2190 kssl_ctx->key,iv); 2191 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf, 2192 sizeof tmp_buf); 2193 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl); 2194 outl += padl; 2195 if (outl > sizeof epms) 2196 { 2197 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); 2198 goto err; 2199 } 2200 EVP_CIPHER_CTX_cleanup(&ciph_ctx); 2201 2202 /* KerberosWrapper.EncryptedPreMasterSecret */ 2203 s2n(outl,p); 2204 memcpy(p, epms, outl); 2205 p+=outl; 2206 n+=outl + 2; 2207 2208 s->session->master_key_length= 2209 s->method->ssl3_enc->generate_master_secret(s, 2210 s->session->master_key, 2211 tmp_buf, sizeof tmp_buf); 2212 2213 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf); 2214 OPENSSL_cleanse(epms, outl); 2215 } 2216#endif 2217#ifndef OPENSSL_NO_DH 2218 else if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) 2219 { 2220 DH *dh_srvr,*dh_clnt; 2221 2222 if (s->session->sess_cert == NULL) 2223 { 2224 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 2225 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE); 2226 goto err; 2227 } 2228 2229 if (s->session->sess_cert->peer_dh_tmp != NULL) 2230 dh_srvr=s->session->sess_cert->peer_dh_tmp; 2231 else 2232 { 2233 /* we get them from the cert */ 2234 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); 2235 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS); 2236 goto err; 2237 } 2238 2239 /* generate a new random key */ 2240 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL) 2241 { 2242 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 2243 goto err; 2244 } 2245 if (!DH_generate_key(dh_clnt)) 2246 { 2247 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 2248 goto err; 2249 } 2250 2251 /* use the 'p' output buffer for the DH key, but 2252 * make sure to clear it out afterwards */ 2253 2254 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt); 2255 2256 if (n <= 0) 2257 { 2258 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 2259 goto err; 2260 } 2261 2262 /* generate master key from the result */ 2263 s->session->master_key_length= 2264 s->method->ssl3_enc->generate_master_secret(s, 2265 s->session->master_key,p,n); 2266 /* clean up */ 2267 memset(p,0,n); 2268 2269 /* send off the data */ 2270 n=BN_num_bytes(dh_clnt->pub_key); 2271 s2n(n,p); 2272 BN_bn2bin(dh_clnt->pub_key,p); 2273 n+=2; 2274 2275 DH_free(dh_clnt); 2276 2277 /* perhaps clean things up a bit EAY EAY EAY EAY*/ 2278 } 2279#endif 2280 2281#ifndef OPENSSL_NO_ECDH 2282 else if ((l & SSL_kECDH) || (l & SSL_kECDHE)) 2283 { 2284 const EC_GROUP *srvr_group = NULL; 2285 EC_KEY *tkey; 2286 int ecdh_clnt_cert = 0; 2287 int field_size = 0; 2288 2289 if (s->session->sess_cert == NULL) 2290 { 2291 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 2292 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE); 2293 goto err; 2294 } 2295 2296 /* Did we send out the client's 2297 * ECDH share for use in premaster 2298 * computation as part of client certificate? 2299 * If so, set ecdh_clnt_cert to 1. 2300 */ 2301 if ((l & SSL_kECDH) && (s->cert != NULL)) 2302 { 2303 /* XXX: For now, we do not support client 2304 * authentication using ECDH certificates. 2305 * To add such support, one needs to add 2306 * code that checks for appropriate 2307 * conditions and sets ecdh_clnt_cert to 1. 2308 * For example, the cert have an ECC 2309 * key on the same curve as the server's 2310 * and the key should be authorized for 2311 * key agreement. 2312 * 2313 * One also needs to add code in ssl3_connect 2314 * to skip sending the certificate verify 2315 * message. 2316 * 2317 * if ((s->cert->key->privatekey != NULL) && 2318 * (s->cert->key->privatekey->type == 2319 * EVP_PKEY_EC) && ...) 2320 * ecdh_clnt_cert = 1; 2321 */ 2322 } 2323 2324 if (s->session->sess_cert->peer_ecdh_tmp != NULL) 2325 { 2326 tkey = s->session->sess_cert->peer_ecdh_tmp; 2327 } 2328 else 2329 { 2330 /* Get the Server Public Key from Cert */ 2331 srvr_pub_pkey = X509_get_pubkey(s->session-> \ 2332 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509); 2333 if ((srvr_pub_pkey == NULL) || 2334 (srvr_pub_pkey->type != EVP_PKEY_EC) || 2335 (srvr_pub_pkey->pkey.ec == NULL)) 2336 { 2337 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2338 ERR_R_INTERNAL_ERROR); 2339 goto err; 2340 } 2341 2342 tkey = srvr_pub_pkey->pkey.ec; 2343 } 2344 2345 srvr_group = EC_KEY_get0_group(tkey); 2346 srvr_ecpoint = EC_KEY_get0_public_key(tkey); 2347 2348 if ((srvr_group == NULL) || (srvr_ecpoint == NULL)) 2349 { 2350 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2351 ERR_R_INTERNAL_ERROR); 2352 goto err; 2353 } 2354 2355 if ((clnt_ecdh=EC_KEY_new()) == NULL) 2356 { 2357 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2358 goto err; 2359 } 2360 2361 if (!EC_KEY_set_group(clnt_ecdh, srvr_group)) 2362 { 2363 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB); 2364 goto err; 2365 } 2366 if (ecdh_clnt_cert) 2367 { 2368 /* Reuse key info from our certificate 2369 * We only need our private key to perform 2370 * the ECDH computation. 2371 */ 2372 const BIGNUM *priv_key; 2373 tkey = s->cert->key->privatekey->pkey.ec; 2374 priv_key = EC_KEY_get0_private_key(tkey); 2375 if (priv_key == NULL) 2376 { 2377 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2378 goto err; 2379 } 2380 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key)) 2381 { 2382 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB); 2383 goto err; 2384 } 2385 } 2386 else 2387 { 2388 /* Generate a new ECDH key pair */ 2389 if (!(EC_KEY_generate_key(clnt_ecdh))) 2390 { 2391 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB); 2392 goto err; 2393 } 2394 } 2395 2396 /* use the 'p' output buffer for the ECDH key, but 2397 * make sure to clear it out afterwards 2398 */ 2399 2400 field_size = EC_GROUP_get_degree(srvr_group); 2401 if (field_size <= 0) 2402 { 2403 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2404 ERR_R_ECDH_LIB); 2405 goto err; 2406 } 2407 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL); 2408 if (n <= 0) 2409 { 2410 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2411 ERR_R_ECDH_LIB); 2412 goto err; 2413 } 2414 2415 /* generate master key from the result */ 2416 s->session->master_key_length = s->method->ssl3_enc \ 2417 -> generate_master_secret(s, 2418 s->session->master_key, 2419 p, n); 2420 2421 memset(p, 0, n); /* clean up */ 2422 2423 if (ecdh_clnt_cert) 2424 { 2425 /* Send empty client key exch message */ 2426 n = 0; 2427 } 2428 else 2429 { 2430 /* First check the size of encoding and 2431 * allocate memory accordingly. 2432 */ 2433 encoded_pt_len = 2434 EC_POINT_point2oct(srvr_group, 2435 EC_KEY_get0_public_key(clnt_ecdh), 2436 POINT_CONVERSION_UNCOMPRESSED, 2437 NULL, 0, NULL); 2438 2439 encodedPoint = (unsigned char *) 2440 OPENSSL_malloc(encoded_pt_len * 2441 sizeof(unsigned char)); 2442 bn_ctx = BN_CTX_new(); 2443 if ((encodedPoint == NULL) || 2444 (bn_ctx == NULL)) 2445 { 2446 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2447 goto err; 2448 } 2449 2450 /* Encode the public key */ 2451 n = EC_POINT_point2oct(srvr_group, 2452 EC_KEY_get0_public_key(clnt_ecdh), 2453 POINT_CONVERSION_UNCOMPRESSED, 2454 encodedPoint, encoded_pt_len, bn_ctx); 2455 2456 *p = n; /* length of encoded point */ 2457 /* Encoded point will be copied here */ 2458 p += 1; 2459 /* copy the point */ 2460 memcpy((unsigned char *)p, encodedPoint, n); 2461 /* increment n to account for length field */ 2462 n += 1; 2463 } 2464 2465 /* Free allocated memory */ 2466 BN_CTX_free(bn_ctx); 2467 if (encodedPoint != NULL) OPENSSL_free(encodedPoint); 2468 if (clnt_ecdh != NULL) 2469 EC_KEY_free(clnt_ecdh); 2470 EVP_PKEY_free(srvr_pub_pkey); 2471 } 2472#endif /* !OPENSSL_NO_ECDH */ 2473 else 2474 { 2475 ssl3_send_alert(s, SSL3_AL_FATAL, 2476 SSL_AD_HANDSHAKE_FAILURE); 2477 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2478 ERR_R_INTERNAL_ERROR); 2479 goto err; 2480 } 2481 2482 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE; 2483 l2n3(n,d); 2484 2485 s->state=SSL3_ST_CW_KEY_EXCH_B; 2486 /* number of bytes to write */ 2487 s->init_num=n+4; 2488 s->init_off=0; 2489 } 2490 2491 /* SSL3_ST_CW_KEY_EXCH_B */ 2492 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 2493err: 2494#ifndef OPENSSL_NO_ECDH 2495 BN_CTX_free(bn_ctx); 2496 if (encodedPoint != NULL) OPENSSL_free(encodedPoint); 2497 if (clnt_ecdh != NULL) 2498 EC_KEY_free(clnt_ecdh); 2499 EVP_PKEY_free(srvr_pub_pkey); 2500#endif 2501 return(-1); 2502 } 2503 2504int ssl3_send_client_verify(SSL *s) 2505 { 2506 unsigned char *p,*d; 2507 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH]; 2508 EVP_PKEY *pkey; 2509#ifndef OPENSSL_NO_RSA 2510 unsigned u=0; 2511#endif 2512 unsigned long n; 2513#if !defined(OPENSSL_NO_DSA) || !defined(OPENSSL_NO_ECDSA) 2514 int j; 2515#endif 2516 2517 if (s->state == SSL3_ST_CW_CERT_VRFY_A) 2518 { 2519 d=(unsigned char *)s->init_buf->data; 2520 p= &(d[4]); 2521 pkey=s->cert->key->privatekey; 2522 2523 s->method->ssl3_enc->cert_verify_mac(s,&(s->s3->finish_dgst2), 2524 &(data[MD5_DIGEST_LENGTH])); 2525 2526#ifndef OPENSSL_NO_RSA 2527 if (pkey->type == EVP_PKEY_RSA) 2528 { 2529 s->method->ssl3_enc->cert_verify_mac(s, 2530 &(s->s3->finish_dgst1),&(data[0])); 2531 if (RSA_sign(NID_md5_sha1, data, 2532 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH, 2533 &(p[2]), &u, pkey->pkey.rsa) <= 0 ) 2534 { 2535 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB); 2536 goto err; 2537 } 2538 s2n(u,p); 2539 n=u+2; 2540 } 2541 else 2542#endif 2543#ifndef OPENSSL_NO_DSA 2544 if (pkey->type == EVP_PKEY_DSA) 2545 { 2546 if (!DSA_sign(pkey->save_type, 2547 &(data[MD5_DIGEST_LENGTH]), 2548 SHA_DIGEST_LENGTH,&(p[2]), 2549 (unsigned int *)&j,pkey->pkey.dsa)) 2550 { 2551 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB); 2552 goto err; 2553 } 2554 s2n(j,p); 2555 n=j+2; 2556 } 2557 else 2558#endif 2559#ifndef OPENSSL_NO_ECDSA 2560 if (pkey->type == EVP_PKEY_EC) 2561 { 2562 if (!ECDSA_sign(pkey->save_type, 2563 &(data[MD5_DIGEST_LENGTH]), 2564 SHA_DIGEST_LENGTH,&(p[2]), 2565 (unsigned int *)&j,pkey->pkey.ec)) 2566 { 2567 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, 2568 ERR_R_ECDSA_LIB); 2569 goto err; 2570 } 2571 s2n(j,p); 2572 n=j+2; 2573 } 2574 else 2575#endif 2576 { 2577 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR); 2578 goto err; 2579 } 2580 *(d++)=SSL3_MT_CERTIFICATE_VERIFY; 2581 l2n3(n,d); 2582 2583 s->state=SSL3_ST_CW_CERT_VRFY_B; 2584 s->init_num=(int)n+4; 2585 s->init_off=0; 2586 } 2587 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 2588err: 2589 return(-1); 2590 } 2591 2592int ssl3_send_client_certificate(SSL *s) 2593 { 2594 X509 *x509=NULL; 2595 EVP_PKEY *pkey=NULL; 2596 int i; 2597 unsigned long l; 2598 2599 if (s->state == SSL3_ST_CW_CERT_A) 2600 { 2601 if ((s->cert == NULL) || 2602 (s->cert->key->x509 == NULL) || 2603 (s->cert->key->privatekey == NULL)) 2604 s->state=SSL3_ST_CW_CERT_B; 2605 else 2606 s->state=SSL3_ST_CW_CERT_C; 2607 } 2608 2609 /* We need to get a client cert */ 2610 if (s->state == SSL3_ST_CW_CERT_B) 2611 { 2612 /* If we get an error, we need to 2613 * ssl->rwstate=SSL_X509_LOOKUP; return(-1); 2614 * We then get retied later */ 2615 i=0; 2616 i = ssl_do_client_cert_cb(s, &x509, &pkey); 2617 if (i < 0) 2618 { 2619 s->rwstate=SSL_X509_LOOKUP; 2620 return(-1); 2621 } 2622 s->rwstate=SSL_NOTHING; 2623 if ((i == 1) && (pkey != NULL) && (x509 != NULL)) 2624 { 2625 s->state=SSL3_ST_CW_CERT_B; 2626 if ( !SSL_use_certificate(s,x509) || 2627 !SSL_use_PrivateKey(s,pkey)) 2628 i=0; 2629 } 2630 else if (i == 1) 2631 { 2632 i=0; 2633 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); 2634 } 2635 2636 if (x509 != NULL) X509_free(x509); 2637 if (pkey != NULL) EVP_PKEY_free(pkey); 2638 if (i == 0) 2639 { 2640 if (s->version == SSL3_VERSION) 2641 { 2642 s->s3->tmp.cert_req=0; 2643 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE); 2644 return(1); 2645 } 2646 else 2647 { 2648 s->s3->tmp.cert_req=2; 2649 } 2650 } 2651 2652 /* Ok, we have a cert */ 2653 s->state=SSL3_ST_CW_CERT_C; 2654 } 2655 2656 if (s->state == SSL3_ST_CW_CERT_C) 2657 { 2658 s->state=SSL3_ST_CW_CERT_D; 2659 l=ssl3_output_cert_chain(s, 2660 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509); 2661 s->init_num=(int)l; 2662 s->init_off=0; 2663 } 2664 /* SSL3_ST_CW_CERT_D */ 2665 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 2666 } 2667 2668#define has_bits(i,m) (((i)&(m)) == (m)) 2669 2670int ssl3_check_cert_and_algorithm(SSL *s) 2671 { 2672 int i,idx; 2673 long algs; 2674 EVP_PKEY *pkey=NULL; 2675 SESS_CERT *sc; 2676#ifndef OPENSSL_NO_RSA 2677 RSA *rsa; 2678#endif 2679#ifndef OPENSSL_NO_DH 2680 DH *dh; 2681#endif 2682 2683 sc=s->session->sess_cert; 2684 2685 algs=s->s3->tmp.new_cipher->algorithms; 2686 2687 /* we don't have a certificate */ 2688 if (algs & (SSL_aDH|SSL_aNULL|SSL_aKRB5)) 2689 return(1); 2690 2691 if (sc == NULL) 2692 { 2693 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR); 2694 goto err; 2695 } 2696 2697#ifndef OPENSSL_NO_RSA 2698 rsa=s->session->sess_cert->peer_rsa_tmp; 2699#endif 2700#ifndef OPENSSL_NO_DH 2701 dh=s->session->sess_cert->peer_dh_tmp; 2702#endif 2703 2704 /* This is the passed certificate */ 2705 2706 idx=sc->peer_cert_type; 2707#ifndef OPENSSL_NO_ECDH 2708 if (idx == SSL_PKEY_ECC) 2709 { 2710 if (check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509, 2711 s->s3->tmp.new_cipher) == 0) 2712 { /* check failed */ 2713 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT); 2714 goto f_err; 2715 } 2716 else 2717 { 2718 return 1; 2719 } 2720 } 2721#endif 2722 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509); 2723 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey); 2724 EVP_PKEY_free(pkey); 2725 2726 2727 /* Check that we have a certificate if we require one */ 2728 if ((algs & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN)) 2729 { 2730 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT); 2731 goto f_err; 2732 } 2733#ifndef OPENSSL_NO_DSA 2734 else if ((algs & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN)) 2735 { 2736 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT); 2737 goto f_err; 2738 } 2739#endif 2740#ifndef OPENSSL_NO_RSA 2741 if ((algs & SSL_kRSA) && 2742 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL))) 2743 { 2744 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT); 2745 goto f_err; 2746 } 2747#endif 2748#ifndef OPENSSL_NO_DH 2749 if ((algs & SSL_kEDH) && 2750 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL))) 2751 { 2752 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY); 2753 goto f_err; 2754 } 2755 else if ((algs & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA)) 2756 { 2757 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT); 2758 goto f_err; 2759 } 2760#ifndef OPENSSL_NO_DSA 2761 else if ((algs & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA)) 2762 { 2763 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT); 2764 goto f_err; 2765 } 2766#endif 2767#endif 2768 2769 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP)) 2770 { 2771#ifndef OPENSSL_NO_RSA 2772 if (algs & SSL_kRSA) 2773 { 2774 if (rsa == NULL 2775 || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) 2776 { 2777 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY); 2778 goto f_err; 2779 } 2780 } 2781 else 2782#endif 2783#ifndef OPENSSL_NO_DH 2784 if (algs & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) 2785 { 2786 if (dh == NULL 2787 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) 2788 { 2789 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY); 2790 goto f_err; 2791 } 2792 } 2793 else 2794#endif 2795 { 2796 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE); 2797 goto f_err; 2798 } 2799 } 2800 return(1); 2801f_err: 2802 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); 2803err: 2804 return(0); 2805 } 2806 2807 2808#ifndef OPENSSL_NO_ECDH 2809/* This is the complement of nid2curve_id in s3_srvr.c. */ 2810static int curve_id2nid(int curve_id) 2811{ 2812 /* ECC curves from draft-ietf-tls-ecc-01.txt (Mar 15, 2001) 2813 * (no changes in draft-ietf-tls-ecc-03.txt [June 2003]) */ 2814 static int nid_list[26] = 2815 { 2816 0, 2817 NID_sect163k1, /* sect163k1 (1) */ 2818 NID_sect163r1, /* sect163r1 (2) */ 2819 NID_sect163r2, /* sect163r2 (3) */ 2820 NID_sect193r1, /* sect193r1 (4) */ 2821 NID_sect193r2, /* sect193r2 (5) */ 2822 NID_sect233k1, /* sect233k1 (6) */ 2823 NID_sect233r1, /* sect233r1 (7) */ 2824 NID_sect239k1, /* sect239k1 (8) */ 2825 NID_sect283k1, /* sect283k1 (9) */ 2826 NID_sect283r1, /* sect283r1 (10) */ 2827 NID_sect409k1, /* sect409k1 (11) */ 2828 NID_sect409r1, /* sect409r1 (12) */ 2829 NID_sect571k1, /* sect571k1 (13) */ 2830 NID_sect571r1, /* sect571r1 (14) */ 2831 NID_secp160k1, /* secp160k1 (15) */ 2832 NID_secp160r1, /* secp160r1 (16) */ 2833 NID_secp160r2, /* secp160r2 (17) */ 2834 NID_secp192k1, /* secp192k1 (18) */ 2835 NID_X9_62_prime192v1, /* secp192r1 (19) */ 2836 NID_secp224k1, /* secp224k1 (20) */ 2837 NID_secp224r1, /* secp224r1 (21) */ 2838 NID_secp256k1, /* secp256k1 (22) */ 2839 NID_X9_62_prime256v1, /* secp256r1 (23) */ 2840 NID_secp384r1, /* secp384r1 (24) */ 2841 NID_secp521r1 /* secp521r1 (25) */ 2842 }; 2843 2844 if ((curve_id < 1) || (curve_id > 25)) return 0; 2845 2846 return nid_list[curve_id]; 2847} 2848#endif 2849 2850/* Check to see if handshake is full or resumed. Usually this is just a 2851 * case of checking to see if a cache hit has occurred. In the case of 2852 * session tickets we have to check the next message to be sure. 2853 */ 2854 2855#ifndef OPENSSL_NO_TLSEXT 2856int ssl3_check_finished(SSL *s) 2857 { 2858 int ok; 2859 long n; 2860 /* If we have no ticket or session ID is non-zero length (a match of 2861 * a non-zero session length would never reach here) it cannot be a 2862 * resumed session. 2863 */ 2864 if (!s->session->tlsext_tick || s->session->session_id_length) 2865 return 1; 2866 /* this function is called when we really expect a Certificate 2867 * message, so permit appropriate message length */ 2868 n=s->method->ssl_get_message(s, 2869 SSL3_ST_CR_CERT_A, 2870 SSL3_ST_CR_CERT_B, 2871 -1, 2872 s->max_cert_list, 2873 &ok); 2874 if (!ok) return((int)n); 2875 s->s3->tmp.reuse_message = 1; 2876 if ((s->s3->tmp.message_type == SSL3_MT_FINISHED) 2877 || (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET)) 2878 return 2; 2879 2880 return 1; 2881 } 2882#endif 2883 2884int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey) 2885 { 2886 int i = 0; 2887#ifndef OPENSSL_NO_ENGINE 2888 if (s->ctx->client_cert_engine) 2889 { 2890 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s, 2891 SSL_get_client_CA_list(s), 2892 px509, ppkey, NULL, NULL, NULL); 2893 if (i != 0) 2894 return i; 2895 } 2896#endif 2897 if (s->ctx->client_cert_cb) 2898 i = s->ctx->client_cert_cb(s,px509,ppkey); 2899 return i; 2900 } 2901