s3_clnt.c revision 279265
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 n2l(p, s->session->tlsext_tick_lifetime_hint); 1809 n2s(p, ticklen); 1810 /* ticket_lifetime_hint + ticket_length + ticket */ 1811 if (ticklen + 6 != n) 1812 { 1813 al = SSL_AD_DECODE_ERROR; 1814 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH); 1815 goto f_err; 1816 } 1817 if (s->session->tlsext_tick) 1818 { 1819 OPENSSL_free(s->session->tlsext_tick); 1820 s->session->tlsext_ticklen = 0; 1821 } 1822 s->session->tlsext_tick = OPENSSL_malloc(ticklen); 1823 if (!s->session->tlsext_tick) 1824 { 1825 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE); 1826 goto err; 1827 } 1828 memcpy(s->session->tlsext_tick, p, ticklen); 1829 s->session->tlsext_ticklen = ticklen; 1830 /* There are two ways to detect a resumed ticket sesion. 1831 * One is to set an appropriate session ID and then the server 1832 * must return a match in ServerHello. This allows the normal 1833 * client session ID matching to work and we know much 1834 * earlier that the ticket has been accepted. 1835 * 1836 * The other way is to set zero length session ID when the 1837 * ticket is presented and rely on the handshake to determine 1838 * session resumption. 1839 * 1840 * We choose the former approach because this fits in with 1841 * assumptions elsewhere in OpenSSL. The session ID is set 1842 * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the 1843 * ticket. 1844 */ 1845 EVP_Digest(p, ticklen, 1846 s->session->session_id, &s->session->session_id_length, 1847#ifndef OPENSSL_NO_SHA256 1848 EVP_sha256(), NULL); 1849#else 1850 EVP_sha1(), NULL); 1851#endif 1852 ret=1; 1853 return(ret); 1854f_err: 1855 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1856err: 1857 return(-1); 1858 } 1859 1860int ssl3_get_cert_status(SSL *s) 1861 { 1862 int ok, al; 1863 unsigned long resplen; 1864 long n; 1865 const unsigned char *p; 1866 1867 n=s->method->ssl_get_message(s, 1868 SSL3_ST_CR_CERT_STATUS_A, 1869 SSL3_ST_CR_CERT_STATUS_B, 1870 SSL3_MT_CERTIFICATE_STATUS, 1871 16384, 1872 &ok); 1873 1874 if (!ok) return((int)n); 1875 if (n < 4) 1876 { 1877 /* need at least status type + length */ 1878 al = SSL_AD_DECODE_ERROR; 1879 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH); 1880 goto f_err; 1881 } 1882 p = (unsigned char *)s->init_msg; 1883 if (*p++ != TLSEXT_STATUSTYPE_ocsp) 1884 { 1885 al = SSL_AD_DECODE_ERROR; 1886 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_UNSUPPORTED_STATUS_TYPE); 1887 goto f_err; 1888 } 1889 n2l3(p, resplen); 1890 if (resplen + 4 != (unsigned long)n) 1891 { 1892 al = SSL_AD_DECODE_ERROR; 1893 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH); 1894 goto f_err; 1895 } 1896 if (s->tlsext_ocsp_resp) 1897 OPENSSL_free(s->tlsext_ocsp_resp); 1898 s->tlsext_ocsp_resp = BUF_memdup(p, resplen); 1899 if (!s->tlsext_ocsp_resp) 1900 { 1901 al = SSL_AD_INTERNAL_ERROR; 1902 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE); 1903 goto f_err; 1904 } 1905 s->tlsext_ocsp_resplen = resplen; 1906 if (s->ctx->tlsext_status_cb) 1907 { 1908 int ret; 1909 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg); 1910 if (ret == 0) 1911 { 1912 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE; 1913 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_INVALID_STATUS_RESPONSE); 1914 goto f_err; 1915 } 1916 if (ret < 0) 1917 { 1918 al = SSL_AD_INTERNAL_ERROR; 1919 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE); 1920 goto f_err; 1921 } 1922 } 1923 return 1; 1924f_err: 1925 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1926 return(-1); 1927 } 1928#endif 1929 1930int ssl3_get_server_done(SSL *s) 1931 { 1932 int ok,ret=0; 1933 long n; 1934 1935 n=s->method->ssl_get_message(s, 1936 SSL3_ST_CR_SRVR_DONE_A, 1937 SSL3_ST_CR_SRVR_DONE_B, 1938 SSL3_MT_SERVER_DONE, 1939 30, /* should be very small, like 0 :-) */ 1940 &ok); 1941 1942 if (!ok) return((int)n); 1943 if (n > 0) 1944 { 1945 /* should contain no data */ 1946 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1947 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH); 1948 return -1; 1949 } 1950 ret=1; 1951 return(ret); 1952 } 1953 1954 1955int ssl3_send_client_key_exchange(SSL *s) 1956 { 1957 unsigned char *p,*d; 1958 int n; 1959 unsigned long l; 1960#ifndef OPENSSL_NO_RSA 1961 unsigned char *q; 1962 EVP_PKEY *pkey=NULL; 1963#endif 1964#ifndef OPENSSL_NO_KRB5 1965 KSSL_ERR kssl_err; 1966#endif /* OPENSSL_NO_KRB5 */ 1967#ifndef OPENSSL_NO_ECDH 1968 EC_KEY *clnt_ecdh = NULL; 1969 const EC_POINT *srvr_ecpoint = NULL; 1970 EVP_PKEY *srvr_pub_pkey = NULL; 1971 unsigned char *encodedPoint = NULL; 1972 int encoded_pt_len = 0; 1973 BN_CTX * bn_ctx = NULL; 1974#endif 1975 1976 if (s->state == SSL3_ST_CW_KEY_EXCH_A) 1977 { 1978 d=(unsigned char *)s->init_buf->data; 1979 p= &(d[4]); 1980 1981 l=s->s3->tmp.new_cipher->algorithms; 1982 1983 /* Fool emacs indentation */ 1984 if (0) {} 1985#ifndef OPENSSL_NO_RSA 1986 else if (l & SSL_kRSA) 1987 { 1988 RSA *rsa; 1989 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; 1990 1991 if (s->session->sess_cert == NULL) 1992 { 1993 /* We should always have a server certificate with SSL_kRSA. */ 1994 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1995 goto err; 1996 } 1997 1998 if (s->session->sess_cert->peer_rsa_tmp != NULL) 1999 rsa=s->session->sess_cert->peer_rsa_tmp; 2000 else 2001 { 2002 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 2003 if ((pkey == NULL) || 2004 (pkey->type != EVP_PKEY_RSA) || 2005 (pkey->pkey.rsa == NULL)) 2006 { 2007 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 2008 goto err; 2009 } 2010 rsa=pkey->pkey.rsa; 2011 EVP_PKEY_free(pkey); 2012 } 2013 2014 tmp_buf[0]=s->client_version>>8; 2015 tmp_buf[1]=s->client_version&0xff; 2016 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0) 2017 goto err; 2018 2019 s->session->master_key_length=sizeof tmp_buf; 2020 2021 q=p; 2022 /* Fix buf for TLS and beyond */ 2023 if (s->version > SSL3_VERSION) 2024 p+=2; 2025 n=RSA_public_encrypt(sizeof tmp_buf, 2026 tmp_buf,p,rsa,RSA_PKCS1_PADDING); 2027#ifdef PKCS1_CHECK 2028 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++; 2029 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70; 2030#endif 2031 if (n <= 0) 2032 { 2033 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT); 2034 goto err; 2035 } 2036 2037 /* Fix buf for TLS and beyond */ 2038 if (s->version > SSL3_VERSION) 2039 { 2040 s2n(n,q); 2041 n+=2; 2042 } 2043 2044 s->session->master_key_length= 2045 s->method->ssl3_enc->generate_master_secret(s, 2046 s->session->master_key, 2047 tmp_buf,sizeof tmp_buf); 2048 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf); 2049 } 2050#endif 2051#ifndef OPENSSL_NO_KRB5 2052 else if (l & SSL_kKRB5) 2053 { 2054 krb5_error_code krb5rc; 2055 KSSL_CTX *kssl_ctx = s->kssl_ctx; 2056 /* krb5_data krb5_ap_req; */ 2057 krb5_data *enc_ticket; 2058 krb5_data authenticator, *authp = NULL; 2059 EVP_CIPHER_CTX ciph_ctx; 2060 EVP_CIPHER *enc = NULL; 2061 unsigned char iv[EVP_MAX_IV_LENGTH]; 2062 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; 2063 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH 2064 + EVP_MAX_IV_LENGTH]; 2065 int padl, outl = sizeof(epms); 2066 2067 EVP_CIPHER_CTX_init(&ciph_ctx); 2068 2069#ifdef KSSL_DEBUG 2070 printf("ssl3_send_client_key_exchange(%lx & %lx)\n", 2071 l, SSL_kKRB5); 2072#endif /* KSSL_DEBUG */ 2073 2074 authp = NULL; 2075#ifdef KRB5SENDAUTH 2076 if (KRB5SENDAUTH) authp = &authenticator; 2077#endif /* KRB5SENDAUTH */ 2078 2079 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp, 2080 &kssl_err); 2081 enc = kssl_map_enc(kssl_ctx->enctype); 2082 if (enc == NULL) 2083 goto err; 2084#ifdef KSSL_DEBUG 2085 { 2086 printf("kssl_cget_tkt rtn %d\n", krb5rc); 2087 if (krb5rc && kssl_err.text) 2088 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text); 2089 } 2090#endif /* KSSL_DEBUG */ 2091 2092 if (krb5rc) 2093 { 2094 ssl3_send_alert(s,SSL3_AL_FATAL, 2095 SSL_AD_HANDSHAKE_FAILURE); 2096 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2097 kssl_err.reason); 2098 goto err; 2099 } 2100 2101 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ 2102 ** in place of RFC 2712 KerberosWrapper, as in: 2103 ** 2104 ** Send ticket (copy to *p, set n = length) 2105 ** n = krb5_ap_req.length; 2106 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length); 2107 ** if (krb5_ap_req.data) 2108 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req); 2109 ** 2110 ** Now using real RFC 2712 KerberosWrapper 2111 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>) 2112 ** Note: 2712 "opaque" types are here replaced 2113 ** with a 2-byte length followed by the value. 2114 ** Example: 2115 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms 2116 ** Where "xx xx" = length bytes. Shown here with 2117 ** optional authenticator omitted. 2118 */ 2119 2120 /* KerberosWrapper.Ticket */ 2121 s2n(enc_ticket->length,p); 2122 memcpy(p, enc_ticket->data, enc_ticket->length); 2123 p+= enc_ticket->length; 2124 n = enc_ticket->length + 2; 2125 2126 /* KerberosWrapper.Authenticator */ 2127 if (authp && authp->length) 2128 { 2129 s2n(authp->length,p); 2130 memcpy(p, authp->data, authp->length); 2131 p+= authp->length; 2132 n+= authp->length + 2; 2133 2134 free(authp->data); 2135 authp->data = NULL; 2136 authp->length = 0; 2137 } 2138 else 2139 { 2140 s2n(0,p);/* null authenticator length */ 2141 n+=2; 2142 } 2143 2144 tmp_buf[0]=s->client_version>>8; 2145 tmp_buf[1]=s->client_version&0xff; 2146 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0) 2147 goto err; 2148 2149 /* 20010420 VRS. Tried it this way; failed. 2150 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL); 2151 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx, 2152 ** kssl_ctx->length); 2153 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv); 2154 */ 2155 2156 memset(iv, 0, sizeof iv); /* per RFC 1510 */ 2157 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL, 2158 kssl_ctx->key,iv); 2159 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf, 2160 sizeof tmp_buf); 2161 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl); 2162 outl += padl; 2163 if (outl > sizeof epms) 2164 { 2165 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); 2166 goto err; 2167 } 2168 EVP_CIPHER_CTX_cleanup(&ciph_ctx); 2169 2170 /* KerberosWrapper.EncryptedPreMasterSecret */ 2171 s2n(outl,p); 2172 memcpy(p, epms, outl); 2173 p+=outl; 2174 n+=outl + 2; 2175 2176 s->session->master_key_length= 2177 s->method->ssl3_enc->generate_master_secret(s, 2178 s->session->master_key, 2179 tmp_buf, sizeof tmp_buf); 2180 2181 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf); 2182 OPENSSL_cleanse(epms, outl); 2183 } 2184#endif 2185#ifndef OPENSSL_NO_DH 2186 else if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) 2187 { 2188 DH *dh_srvr,*dh_clnt; 2189 2190 if (s->session->sess_cert == NULL) 2191 { 2192 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 2193 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE); 2194 goto err; 2195 } 2196 2197 if (s->session->sess_cert->peer_dh_tmp != NULL) 2198 dh_srvr=s->session->sess_cert->peer_dh_tmp; 2199 else 2200 { 2201 /* we get them from the cert */ 2202 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); 2203 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS); 2204 goto err; 2205 } 2206 2207 /* generate a new random key */ 2208 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL) 2209 { 2210 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 2211 goto err; 2212 } 2213 if (!DH_generate_key(dh_clnt)) 2214 { 2215 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 2216 goto err; 2217 } 2218 2219 /* use the 'p' output buffer for the DH key, but 2220 * make sure to clear it out afterwards */ 2221 2222 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt); 2223 2224 if (n <= 0) 2225 { 2226 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 2227 goto err; 2228 } 2229 2230 /* generate master key from the result */ 2231 s->session->master_key_length= 2232 s->method->ssl3_enc->generate_master_secret(s, 2233 s->session->master_key,p,n); 2234 /* clean up */ 2235 memset(p,0,n); 2236 2237 /* send off the data */ 2238 n=BN_num_bytes(dh_clnt->pub_key); 2239 s2n(n,p); 2240 BN_bn2bin(dh_clnt->pub_key,p); 2241 n+=2; 2242 2243 DH_free(dh_clnt); 2244 2245 /* perhaps clean things up a bit EAY EAY EAY EAY*/ 2246 } 2247#endif 2248 2249#ifndef OPENSSL_NO_ECDH 2250 else if ((l & SSL_kECDH) || (l & SSL_kECDHE)) 2251 { 2252 const EC_GROUP *srvr_group = NULL; 2253 EC_KEY *tkey; 2254 int ecdh_clnt_cert = 0; 2255 int field_size = 0; 2256 2257 if (s->session->sess_cert == NULL) 2258 { 2259 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 2260 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE); 2261 goto err; 2262 } 2263 2264 /* Did we send out the client's 2265 * ECDH share for use in premaster 2266 * computation as part of client certificate? 2267 * If so, set ecdh_clnt_cert to 1. 2268 */ 2269 if ((l & SSL_kECDH) && (s->cert != NULL)) 2270 { 2271 /* XXX: For now, we do not support client 2272 * authentication using ECDH certificates. 2273 * To add such support, one needs to add 2274 * code that checks for appropriate 2275 * conditions and sets ecdh_clnt_cert to 1. 2276 * For example, the cert have an ECC 2277 * key on the same curve as the server's 2278 * and the key should be authorized for 2279 * key agreement. 2280 * 2281 * One also needs to add code in ssl3_connect 2282 * to skip sending the certificate verify 2283 * message. 2284 * 2285 * if ((s->cert->key->privatekey != NULL) && 2286 * (s->cert->key->privatekey->type == 2287 * EVP_PKEY_EC) && ...) 2288 * ecdh_clnt_cert = 1; 2289 */ 2290 } 2291 2292 if (s->session->sess_cert->peer_ecdh_tmp != NULL) 2293 { 2294 tkey = s->session->sess_cert->peer_ecdh_tmp; 2295 } 2296 else 2297 { 2298 /* Get the Server Public Key from Cert */ 2299 srvr_pub_pkey = X509_get_pubkey(s->session-> \ 2300 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509); 2301 if ((srvr_pub_pkey == NULL) || 2302 (srvr_pub_pkey->type != EVP_PKEY_EC) || 2303 (srvr_pub_pkey->pkey.ec == NULL)) 2304 { 2305 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2306 ERR_R_INTERNAL_ERROR); 2307 goto err; 2308 } 2309 2310 tkey = srvr_pub_pkey->pkey.ec; 2311 } 2312 2313 srvr_group = EC_KEY_get0_group(tkey); 2314 srvr_ecpoint = EC_KEY_get0_public_key(tkey); 2315 2316 if ((srvr_group == NULL) || (srvr_ecpoint == NULL)) 2317 { 2318 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2319 ERR_R_INTERNAL_ERROR); 2320 goto err; 2321 } 2322 2323 if ((clnt_ecdh=EC_KEY_new()) == NULL) 2324 { 2325 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2326 goto err; 2327 } 2328 2329 if (!EC_KEY_set_group(clnt_ecdh, srvr_group)) 2330 { 2331 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB); 2332 goto err; 2333 } 2334 if (ecdh_clnt_cert) 2335 { 2336 /* Reuse key info from our certificate 2337 * We only need our private key to perform 2338 * the ECDH computation. 2339 */ 2340 const BIGNUM *priv_key; 2341 tkey = s->cert->key->privatekey->pkey.ec; 2342 priv_key = EC_KEY_get0_private_key(tkey); 2343 if (priv_key == NULL) 2344 { 2345 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2346 goto err; 2347 } 2348 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key)) 2349 { 2350 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB); 2351 goto err; 2352 } 2353 } 2354 else 2355 { 2356 /* Generate a new ECDH key pair */ 2357 if (!(EC_KEY_generate_key(clnt_ecdh))) 2358 { 2359 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB); 2360 goto err; 2361 } 2362 } 2363 2364 /* use the 'p' output buffer for the ECDH key, but 2365 * make sure to clear it out afterwards 2366 */ 2367 2368 field_size = EC_GROUP_get_degree(srvr_group); 2369 if (field_size <= 0) 2370 { 2371 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2372 ERR_R_ECDH_LIB); 2373 goto err; 2374 } 2375 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL); 2376 if (n <= 0) 2377 { 2378 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2379 ERR_R_ECDH_LIB); 2380 goto err; 2381 } 2382 2383 /* generate master key from the result */ 2384 s->session->master_key_length = s->method->ssl3_enc \ 2385 -> generate_master_secret(s, 2386 s->session->master_key, 2387 p, n); 2388 2389 memset(p, 0, n); /* clean up */ 2390 2391 if (ecdh_clnt_cert) 2392 { 2393 /* Send empty client key exch message */ 2394 n = 0; 2395 } 2396 else 2397 { 2398 /* First check the size of encoding and 2399 * allocate memory accordingly. 2400 */ 2401 encoded_pt_len = 2402 EC_POINT_point2oct(srvr_group, 2403 EC_KEY_get0_public_key(clnt_ecdh), 2404 POINT_CONVERSION_UNCOMPRESSED, 2405 NULL, 0, NULL); 2406 2407 encodedPoint = (unsigned char *) 2408 OPENSSL_malloc(encoded_pt_len * 2409 sizeof(unsigned char)); 2410 bn_ctx = BN_CTX_new(); 2411 if ((encodedPoint == NULL) || 2412 (bn_ctx == NULL)) 2413 { 2414 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2415 goto err; 2416 } 2417 2418 /* Encode the public key */ 2419 n = EC_POINT_point2oct(srvr_group, 2420 EC_KEY_get0_public_key(clnt_ecdh), 2421 POINT_CONVERSION_UNCOMPRESSED, 2422 encodedPoint, encoded_pt_len, bn_ctx); 2423 2424 *p = n; /* length of encoded point */ 2425 /* Encoded point will be copied here */ 2426 p += 1; 2427 /* copy the point */ 2428 memcpy((unsigned char *)p, encodedPoint, n); 2429 /* increment n to account for length field */ 2430 n += 1; 2431 } 2432 2433 /* Free allocated memory */ 2434 BN_CTX_free(bn_ctx); 2435 if (encodedPoint != NULL) OPENSSL_free(encodedPoint); 2436 if (clnt_ecdh != NULL) 2437 EC_KEY_free(clnt_ecdh); 2438 EVP_PKEY_free(srvr_pub_pkey); 2439 } 2440#endif /* !OPENSSL_NO_ECDH */ 2441 else 2442 { 2443 ssl3_send_alert(s, SSL3_AL_FATAL, 2444 SSL_AD_HANDSHAKE_FAILURE); 2445 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2446 ERR_R_INTERNAL_ERROR); 2447 goto err; 2448 } 2449 2450 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE; 2451 l2n3(n,d); 2452 2453 s->state=SSL3_ST_CW_KEY_EXCH_B; 2454 /* number of bytes to write */ 2455 s->init_num=n+4; 2456 s->init_off=0; 2457 } 2458 2459 /* SSL3_ST_CW_KEY_EXCH_B */ 2460 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 2461err: 2462#ifndef OPENSSL_NO_ECDH 2463 BN_CTX_free(bn_ctx); 2464 if (encodedPoint != NULL) OPENSSL_free(encodedPoint); 2465 if (clnt_ecdh != NULL) 2466 EC_KEY_free(clnt_ecdh); 2467 EVP_PKEY_free(srvr_pub_pkey); 2468#endif 2469 return(-1); 2470 } 2471 2472int ssl3_send_client_verify(SSL *s) 2473 { 2474 unsigned char *p,*d; 2475 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH]; 2476 EVP_PKEY *pkey; 2477#ifndef OPENSSL_NO_RSA 2478 unsigned u=0; 2479#endif 2480 unsigned long n; 2481#if !defined(OPENSSL_NO_DSA) || !defined(OPENSSL_NO_ECDSA) 2482 int j; 2483#endif 2484 2485 if (s->state == SSL3_ST_CW_CERT_VRFY_A) 2486 { 2487 d=(unsigned char *)s->init_buf->data; 2488 p= &(d[4]); 2489 pkey=s->cert->key->privatekey; 2490 2491 s->method->ssl3_enc->cert_verify_mac(s,&(s->s3->finish_dgst2), 2492 &(data[MD5_DIGEST_LENGTH])); 2493 2494#ifndef OPENSSL_NO_RSA 2495 if (pkey->type == EVP_PKEY_RSA) 2496 { 2497 s->method->ssl3_enc->cert_verify_mac(s, 2498 &(s->s3->finish_dgst1),&(data[0])); 2499 if (RSA_sign(NID_md5_sha1, data, 2500 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH, 2501 &(p[2]), &u, pkey->pkey.rsa) <= 0 ) 2502 { 2503 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB); 2504 goto err; 2505 } 2506 s2n(u,p); 2507 n=u+2; 2508 } 2509 else 2510#endif 2511#ifndef OPENSSL_NO_DSA 2512 if (pkey->type == EVP_PKEY_DSA) 2513 { 2514 if (!DSA_sign(pkey->save_type, 2515 &(data[MD5_DIGEST_LENGTH]), 2516 SHA_DIGEST_LENGTH,&(p[2]), 2517 (unsigned int *)&j,pkey->pkey.dsa)) 2518 { 2519 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB); 2520 goto err; 2521 } 2522 s2n(j,p); 2523 n=j+2; 2524 } 2525 else 2526#endif 2527#ifndef OPENSSL_NO_ECDSA 2528 if (pkey->type == EVP_PKEY_EC) 2529 { 2530 if (!ECDSA_sign(pkey->save_type, 2531 &(data[MD5_DIGEST_LENGTH]), 2532 SHA_DIGEST_LENGTH,&(p[2]), 2533 (unsigned int *)&j,pkey->pkey.ec)) 2534 { 2535 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, 2536 ERR_R_ECDSA_LIB); 2537 goto err; 2538 } 2539 s2n(j,p); 2540 n=j+2; 2541 } 2542 else 2543#endif 2544 { 2545 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR); 2546 goto err; 2547 } 2548 *(d++)=SSL3_MT_CERTIFICATE_VERIFY; 2549 l2n3(n,d); 2550 2551 s->state=SSL3_ST_CW_CERT_VRFY_B; 2552 s->init_num=(int)n+4; 2553 s->init_off=0; 2554 } 2555 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 2556err: 2557 return(-1); 2558 } 2559 2560int ssl3_send_client_certificate(SSL *s) 2561 { 2562 X509 *x509=NULL; 2563 EVP_PKEY *pkey=NULL; 2564 int i; 2565 unsigned long l; 2566 2567 if (s->state == SSL3_ST_CW_CERT_A) 2568 { 2569 if ((s->cert == NULL) || 2570 (s->cert->key->x509 == NULL) || 2571 (s->cert->key->privatekey == NULL)) 2572 s->state=SSL3_ST_CW_CERT_B; 2573 else 2574 s->state=SSL3_ST_CW_CERT_C; 2575 } 2576 2577 /* We need to get a client cert */ 2578 if (s->state == SSL3_ST_CW_CERT_B) 2579 { 2580 /* If we get an error, we need to 2581 * ssl->rwstate=SSL_X509_LOOKUP; return(-1); 2582 * We then get retied later */ 2583 i=0; 2584 i = ssl_do_client_cert_cb(s, &x509, &pkey); 2585 if (i < 0) 2586 { 2587 s->rwstate=SSL_X509_LOOKUP; 2588 return(-1); 2589 } 2590 s->rwstate=SSL_NOTHING; 2591 if ((i == 1) && (pkey != NULL) && (x509 != NULL)) 2592 { 2593 s->state=SSL3_ST_CW_CERT_B; 2594 if ( !SSL_use_certificate(s,x509) || 2595 !SSL_use_PrivateKey(s,pkey)) 2596 i=0; 2597 } 2598 else if (i == 1) 2599 { 2600 i=0; 2601 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); 2602 } 2603 2604 if (x509 != NULL) X509_free(x509); 2605 if (pkey != NULL) EVP_PKEY_free(pkey); 2606 if (i == 0) 2607 { 2608 if (s->version == SSL3_VERSION) 2609 { 2610 s->s3->tmp.cert_req=0; 2611 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE); 2612 return(1); 2613 } 2614 else 2615 { 2616 s->s3->tmp.cert_req=2; 2617 } 2618 } 2619 2620 /* Ok, we have a cert */ 2621 s->state=SSL3_ST_CW_CERT_C; 2622 } 2623 2624 if (s->state == SSL3_ST_CW_CERT_C) 2625 { 2626 s->state=SSL3_ST_CW_CERT_D; 2627 l=ssl3_output_cert_chain(s, 2628 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509); 2629 s->init_num=(int)l; 2630 s->init_off=0; 2631 } 2632 /* SSL3_ST_CW_CERT_D */ 2633 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 2634 } 2635 2636#define has_bits(i,m) (((i)&(m)) == (m)) 2637 2638int ssl3_check_cert_and_algorithm(SSL *s) 2639 { 2640 int i,idx; 2641 long algs; 2642 EVP_PKEY *pkey=NULL; 2643 SESS_CERT *sc; 2644#ifndef OPENSSL_NO_RSA 2645 RSA *rsa; 2646#endif 2647#ifndef OPENSSL_NO_DH 2648 DH *dh; 2649#endif 2650 2651 sc=s->session->sess_cert; 2652 2653 algs=s->s3->tmp.new_cipher->algorithms; 2654 2655 /* we don't have a certificate */ 2656 if (algs & (SSL_aDH|SSL_aNULL|SSL_aKRB5)) 2657 return(1); 2658 2659 if (sc == NULL) 2660 { 2661 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR); 2662 goto err; 2663 } 2664 2665#ifndef OPENSSL_NO_RSA 2666 rsa=s->session->sess_cert->peer_rsa_tmp; 2667#endif 2668#ifndef OPENSSL_NO_DH 2669 dh=s->session->sess_cert->peer_dh_tmp; 2670#endif 2671 2672 /* This is the passed certificate */ 2673 2674 idx=sc->peer_cert_type; 2675#ifndef OPENSSL_NO_ECDH 2676 if (idx == SSL_PKEY_ECC) 2677 { 2678 if (check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509, 2679 s->s3->tmp.new_cipher) == 0) 2680 { /* check failed */ 2681 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT); 2682 goto f_err; 2683 } 2684 else 2685 { 2686 return 1; 2687 } 2688 } 2689#endif 2690 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509); 2691 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey); 2692 EVP_PKEY_free(pkey); 2693 2694 2695 /* Check that we have a certificate if we require one */ 2696 if ((algs & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN)) 2697 { 2698 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT); 2699 goto f_err; 2700 } 2701#ifndef OPENSSL_NO_DSA 2702 else if ((algs & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN)) 2703 { 2704 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT); 2705 goto f_err; 2706 } 2707#endif 2708#ifndef OPENSSL_NO_RSA 2709 if ((algs & SSL_kRSA) && 2710 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL))) 2711 { 2712 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT); 2713 goto f_err; 2714 } 2715#endif 2716#ifndef OPENSSL_NO_DH 2717 if ((algs & SSL_kEDH) && 2718 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL))) 2719 { 2720 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY); 2721 goto f_err; 2722 } 2723 else if ((algs & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA)) 2724 { 2725 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT); 2726 goto f_err; 2727 } 2728#ifndef OPENSSL_NO_DSA 2729 else if ((algs & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA)) 2730 { 2731 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT); 2732 goto f_err; 2733 } 2734#endif 2735#endif 2736 2737 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP)) 2738 { 2739#ifndef OPENSSL_NO_RSA 2740 if (algs & SSL_kRSA) 2741 { 2742 if (rsa == NULL 2743 || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) 2744 { 2745 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY); 2746 goto f_err; 2747 } 2748 } 2749 else 2750#endif 2751#ifndef OPENSSL_NO_DH 2752 if (algs & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) 2753 { 2754 if (dh == NULL 2755 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) 2756 { 2757 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY); 2758 goto f_err; 2759 } 2760 } 2761 else 2762#endif 2763 { 2764 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE); 2765 goto f_err; 2766 } 2767 } 2768 return(1); 2769f_err: 2770 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); 2771err: 2772 return(0); 2773 } 2774 2775 2776#ifndef OPENSSL_NO_ECDH 2777/* This is the complement of nid2curve_id in s3_srvr.c. */ 2778static int curve_id2nid(int curve_id) 2779{ 2780 /* ECC curves from draft-ietf-tls-ecc-01.txt (Mar 15, 2001) 2781 * (no changes in draft-ietf-tls-ecc-03.txt [June 2003]) */ 2782 static int nid_list[26] = 2783 { 2784 0, 2785 NID_sect163k1, /* sect163k1 (1) */ 2786 NID_sect163r1, /* sect163r1 (2) */ 2787 NID_sect163r2, /* sect163r2 (3) */ 2788 NID_sect193r1, /* sect193r1 (4) */ 2789 NID_sect193r2, /* sect193r2 (5) */ 2790 NID_sect233k1, /* sect233k1 (6) */ 2791 NID_sect233r1, /* sect233r1 (7) */ 2792 NID_sect239k1, /* sect239k1 (8) */ 2793 NID_sect283k1, /* sect283k1 (9) */ 2794 NID_sect283r1, /* sect283r1 (10) */ 2795 NID_sect409k1, /* sect409k1 (11) */ 2796 NID_sect409r1, /* sect409r1 (12) */ 2797 NID_sect571k1, /* sect571k1 (13) */ 2798 NID_sect571r1, /* sect571r1 (14) */ 2799 NID_secp160k1, /* secp160k1 (15) */ 2800 NID_secp160r1, /* secp160r1 (16) */ 2801 NID_secp160r2, /* secp160r2 (17) */ 2802 NID_secp192k1, /* secp192k1 (18) */ 2803 NID_X9_62_prime192v1, /* secp192r1 (19) */ 2804 NID_secp224k1, /* secp224k1 (20) */ 2805 NID_secp224r1, /* secp224r1 (21) */ 2806 NID_secp256k1, /* secp256k1 (22) */ 2807 NID_X9_62_prime256v1, /* secp256r1 (23) */ 2808 NID_secp384r1, /* secp384r1 (24) */ 2809 NID_secp521r1 /* secp521r1 (25) */ 2810 }; 2811 2812 if ((curve_id < 1) || (curve_id > 25)) return 0; 2813 2814 return nid_list[curve_id]; 2815} 2816#endif 2817 2818/* Check to see if handshake is full or resumed. Usually this is just a 2819 * case of checking to see if a cache hit has occurred. In the case of 2820 * session tickets we have to check the next message to be sure. 2821 */ 2822 2823#ifndef OPENSSL_NO_TLSEXT 2824int ssl3_check_finished(SSL *s) 2825 { 2826 int ok; 2827 long n; 2828 /* If we have no ticket or session ID is non-zero length (a match of 2829 * a non-zero session length would never reach here) it cannot be a 2830 * resumed session. 2831 */ 2832 if (!s->session->tlsext_tick || s->session->session_id_length) 2833 return 1; 2834 /* this function is called when we really expect a Certificate 2835 * message, so permit appropriate message length */ 2836 n=s->method->ssl_get_message(s, 2837 SSL3_ST_CR_CERT_A, 2838 SSL3_ST_CR_CERT_B, 2839 -1, 2840 s->max_cert_list, 2841 &ok); 2842 if (!ok) return((int)n); 2843 s->s3->tmp.reuse_message = 1; 2844 if ((s->s3->tmp.message_type == SSL3_MT_FINISHED) 2845 || (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET)) 2846 return 2; 2847 2848 return 1; 2849 } 2850#endif 2851 2852int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey) 2853 { 2854 int i = 0; 2855#ifndef OPENSSL_NO_ENGINE 2856 if (s->ctx->client_cert_engine) 2857 { 2858 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s, 2859 SSL_get_client_CA_list(s), 2860 px509, ppkey, NULL, NULL, NULL); 2861 if (i != 0) 2862 return i; 2863 } 2864#endif 2865 if (s->ctx->client_cert_cb) 2866 i = s->ctx->client_cert_cb(s,px509,ppkey); 2867 return i; 2868 } 2869