s3_clnt.c revision 237657
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 s->state=SSL3_ST_CR_FINISHED_A; 266 else 267 s->state=SSL3_ST_CR_CERT_A; 268 s->init_num=0; 269 break; 270 271 case SSL3_ST_CR_CERT_A: 272 case SSL3_ST_CR_CERT_B: 273#ifndef OPENSSL_NO_TLSEXT 274 ret=ssl3_check_finished(s); 275 if (ret <= 0) goto end; 276 if (ret == 2) 277 { 278 s->hit = 1; 279 if (s->tlsext_ticket_expected) 280 s->state=SSL3_ST_CR_SESSION_TICKET_A; 281 else 282 s->state=SSL3_ST_CR_FINISHED_A; 283 s->init_num=0; 284 break; 285 } 286#endif 287 /* Check if it is anon DH/ECDH */ 288 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL)) 289 { 290 ret=ssl3_get_server_certificate(s); 291 if (ret <= 0) goto end; 292#ifndef OPENSSL_NO_TLSEXT 293 if (s->tlsext_status_expected) 294 s->state=SSL3_ST_CR_CERT_STATUS_A; 295 else 296 s->state=SSL3_ST_CR_KEY_EXCH_A; 297 } 298 else 299 { 300 skip = 1; 301 s->state=SSL3_ST_CR_KEY_EXCH_A; 302 } 303#else 304 } 305 else 306 skip=1; 307 308 s->state=SSL3_ST_CR_KEY_EXCH_A; 309#endif 310 s->init_num=0; 311 break; 312 313 case SSL3_ST_CR_KEY_EXCH_A: 314 case SSL3_ST_CR_KEY_EXCH_B: 315 ret=ssl3_get_key_exchange(s); 316 if (ret <= 0) goto end; 317 s->state=SSL3_ST_CR_CERT_REQ_A; 318 s->init_num=0; 319 320 /* at this point we check that we have the 321 * required stuff from the server */ 322 if (!ssl3_check_cert_and_algorithm(s)) 323 { 324 ret= -1; 325 goto end; 326 } 327 break; 328 329 case SSL3_ST_CR_CERT_REQ_A: 330 case SSL3_ST_CR_CERT_REQ_B: 331 ret=ssl3_get_certificate_request(s); 332 if (ret <= 0) goto end; 333 s->state=SSL3_ST_CR_SRVR_DONE_A; 334 s->init_num=0; 335 break; 336 337 case SSL3_ST_CR_SRVR_DONE_A: 338 case SSL3_ST_CR_SRVR_DONE_B: 339 ret=ssl3_get_server_done(s); 340 if (ret <= 0) goto end; 341 if (s->s3->tmp.cert_req) 342 s->state=SSL3_ST_CW_CERT_A; 343 else 344 s->state=SSL3_ST_CW_KEY_EXCH_A; 345 s->init_num=0; 346 347 break; 348 349 case SSL3_ST_CW_CERT_A: 350 case SSL3_ST_CW_CERT_B: 351 case SSL3_ST_CW_CERT_C: 352 case SSL3_ST_CW_CERT_D: 353 ret=ssl3_send_client_certificate(s); 354 if (ret <= 0) goto end; 355 s->state=SSL3_ST_CW_KEY_EXCH_A; 356 s->init_num=0; 357 break; 358 359 case SSL3_ST_CW_KEY_EXCH_A: 360 case SSL3_ST_CW_KEY_EXCH_B: 361 ret=ssl3_send_client_key_exchange(s); 362 if (ret <= 0) goto end; 363 /* EAY EAY EAY need to check for DH fix cert 364 * sent back */ 365 /* For TLS, cert_req is set to 2, so a cert chain 366 * of nothing is sent, but no verify packet is sent */ 367 /* XXX: For now, we do not support client 368 * authentication in ECDH cipher suites with 369 * ECDH (rather than ECDSA) certificates. 370 * We need to skip the certificate verify 371 * message when client's ECDH public key is sent 372 * inside the client certificate. 373 */ 374 if (s->s3->tmp.cert_req == 1) 375 { 376 s->state=SSL3_ST_CW_CERT_VRFY_A; 377 } 378 else 379 { 380 s->state=SSL3_ST_CW_CHANGE_A; 381 s->s3->change_cipher_spec=0; 382 } 383 384 s->init_num=0; 385 break; 386 387 case SSL3_ST_CW_CERT_VRFY_A: 388 case SSL3_ST_CW_CERT_VRFY_B: 389 ret=ssl3_send_client_verify(s); 390 if (ret <= 0) goto end; 391 s->state=SSL3_ST_CW_CHANGE_A; 392 s->init_num=0; 393 s->s3->change_cipher_spec=0; 394 break; 395 396 case SSL3_ST_CW_CHANGE_A: 397 case SSL3_ST_CW_CHANGE_B: 398 ret=ssl3_send_change_cipher_spec(s, 399 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B); 400 if (ret <= 0) goto end; 401 s->state=SSL3_ST_CW_FINISHED_A; 402 s->init_num=0; 403 404 s->session->cipher=s->s3->tmp.new_cipher; 405#ifdef OPENSSL_NO_COMP 406 s->session->compress_meth=0; 407#else 408 if (s->s3->tmp.new_compression == NULL) 409 s->session->compress_meth=0; 410 else 411 s->session->compress_meth= 412 s->s3->tmp.new_compression->id; 413#endif 414 if (!s->method->ssl3_enc->setup_key_block(s)) 415 { 416 ret= -1; 417 goto end; 418 } 419 420 if (!s->method->ssl3_enc->change_cipher_state(s, 421 SSL3_CHANGE_CIPHER_CLIENT_WRITE)) 422 { 423 ret= -1; 424 goto end; 425 } 426 427 break; 428 429 case SSL3_ST_CW_FINISHED_A: 430 case SSL3_ST_CW_FINISHED_B: 431 ret=ssl3_send_finished(s, 432 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B, 433 s->method->ssl3_enc->client_finished_label, 434 s->method->ssl3_enc->client_finished_label_len); 435 if (ret <= 0) goto end; 436 s->state=SSL3_ST_CW_FLUSH; 437 438 /* clear flags */ 439 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER; 440 if (s->hit) 441 { 442 s->s3->tmp.next_state=SSL_ST_OK; 443 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED) 444 { 445 s->state=SSL_ST_OK; 446 s->s3->flags|=SSL3_FLAGS_POP_BUFFER; 447 s->s3->delay_buf_pop_ret=0; 448 } 449 } 450 else 451 { 452#ifndef OPENSSL_NO_TLSEXT 453 /* Allow NewSessionTicket if ticket expected */ 454 if (s->tlsext_ticket_expected) 455 s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A; 456 else 457#endif 458 459 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A; 460 } 461 s->init_num=0; 462 break; 463 464#ifndef OPENSSL_NO_TLSEXT 465 case SSL3_ST_CR_SESSION_TICKET_A: 466 case SSL3_ST_CR_SESSION_TICKET_B: 467 ret=ssl3_get_new_session_ticket(s); 468 if (ret <= 0) goto end; 469 s->state=SSL3_ST_CR_FINISHED_A; 470 s->init_num=0; 471 break; 472 473 case SSL3_ST_CR_CERT_STATUS_A: 474 case SSL3_ST_CR_CERT_STATUS_B: 475 ret=ssl3_get_cert_status(s); 476 if (ret <= 0) goto end; 477 s->state=SSL3_ST_CR_KEY_EXCH_A; 478 s->init_num=0; 479 break; 480#endif 481 482 case SSL3_ST_CR_FINISHED_A: 483 case SSL3_ST_CR_FINISHED_B: 484 485 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A, 486 SSL3_ST_CR_FINISHED_B); 487 if (ret <= 0) goto end; 488 489 if (s->hit) 490 s->state=SSL3_ST_CW_CHANGE_A; 491 else 492 s->state=SSL_ST_OK; 493 s->init_num=0; 494 break; 495 496 case SSL3_ST_CW_FLUSH: 497 s->rwstate=SSL_WRITING; 498 if (BIO_flush(s->wbio) <= 0) 499 { 500 ret= -1; 501 goto end; 502 } 503 s->rwstate=SSL_NOTHING; 504 s->state=s->s3->tmp.next_state; 505 break; 506 507 case SSL_ST_OK: 508 /* clean a few things up */ 509 ssl3_cleanup_key_block(s); 510 511 if (s->init_buf != NULL) 512 { 513 BUF_MEM_free(s->init_buf); 514 s->init_buf=NULL; 515 } 516 517 /* If we are not 'joining' the last two packets, 518 * remove the buffering now */ 519 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER)) 520 ssl_free_wbio_buffer(s); 521 /* else do it later in ssl3_write */ 522 523 s->init_num=0; 524 s->new_session=0; 525 526 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT); 527 if (s->hit) s->ctx->stats.sess_hit++; 528 529 ret=1; 530 /* s->server=0; */ 531 s->handshake_func=ssl3_connect; 532 s->ctx->stats.sess_connect_good++; 533 534 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1); 535 536 goto end; 537 /* break; */ 538 539 default: 540 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE); 541 ret= -1; 542 goto end; 543 /* break; */ 544 } 545 546 /* did we do anything */ 547 if (!s->s3->tmp.reuse_message && !skip) 548 { 549 if (s->debug) 550 { 551 if ((ret=BIO_flush(s->wbio)) <= 0) 552 goto end; 553 } 554 555 if ((cb != NULL) && (s->state != state)) 556 { 557 new_state=s->state; 558 s->state=state; 559 cb(s,SSL_CB_CONNECT_LOOP,1); 560 s->state=new_state; 561 } 562 } 563 skip=0; 564 } 565end: 566 s->in_handshake--; 567 if (buf != NULL) 568 BUF_MEM_free(buf); 569 if (cb != NULL) 570 cb(s,SSL_CB_CONNECT_EXIT,ret); 571 return(ret); 572 } 573 574 575int ssl3_client_hello(SSL *s) 576 { 577 unsigned char *buf; 578 unsigned char *p,*d; 579 int i; 580 unsigned long Time,l; 581#ifndef OPENSSL_NO_COMP 582 int j; 583 SSL_COMP *comp; 584#endif 585 586 buf=(unsigned char *)s->init_buf->data; 587 if (s->state == SSL3_ST_CW_CLNT_HELLO_A) 588 { 589 SSL_SESSION *sess = s->session; 590 if ((sess == NULL) || 591 (sess->ssl_version != s->version) || 592#ifdef OPENSSL_NO_TLSEXT 593 !sess->session_id_length || 594#else 595 (!sess->session_id_length && !sess->tlsext_tick) || 596#endif 597 (sess->not_resumable)) 598 { 599 if (!ssl_get_new_session(s,0)) 600 goto err; 601 } 602 /* else use the pre-loaded session */ 603 604 p=s->s3->client_random; 605 Time=(unsigned long)time(NULL); /* Time */ 606 l2n(Time,p); 607 if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0) 608 goto err; 609 610 /* Do the message type and length last */ 611 d=p= &(buf[4]); 612 613 *(p++)=s->version>>8; 614 *(p++)=s->version&0xff; 615 s->client_version=s->version; 616 617 /* Random stuff */ 618 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE); 619 p+=SSL3_RANDOM_SIZE; 620 621 /* Session ID */ 622 if (s->new_session) 623 i=0; 624 else 625 i=s->session->session_id_length; 626 *(p++)=i; 627 if (i != 0) 628 { 629 if (i > (int)sizeof(s->session->session_id)) 630 { 631 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); 632 goto err; 633 } 634 memcpy(p,s->session->session_id,i); 635 p+=i; 636 } 637 638 /* Ciphers supported */ 639 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0); 640 if (i == 0) 641 { 642 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE); 643 goto err; 644 } 645 s2n(i,p); 646 p+=i; 647 648 /* COMPRESSION */ 649#ifdef OPENSSL_NO_COMP 650 *(p++)=1; 651#else 652 if (s->ctx->comp_methods == NULL) 653 j=0; 654 else 655 j=sk_SSL_COMP_num(s->ctx->comp_methods); 656 *(p++)=1+j; 657 for (i=0; i<j; i++) 658 { 659 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i); 660 *(p++)=comp->id; 661 } 662#endif 663 *(p++)=0; /* Add the NULL method */ 664#ifndef OPENSSL_NO_TLSEXT 665 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL) 666 { 667 SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR); 668 goto err; 669 } 670#endif 671 l=(p-d); 672 d=buf; 673 *(d++)=SSL3_MT_CLIENT_HELLO; 674 l2n3(l,d); 675 676 s->state=SSL3_ST_CW_CLNT_HELLO_B; 677 /* number of bytes to write */ 678 s->init_num=p-buf; 679 s->init_off=0; 680 } 681 682 /* SSL3_ST_CW_CLNT_HELLO_B */ 683 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 684err: 685 return(-1); 686 } 687 688int ssl3_get_server_hello(SSL *s) 689 { 690 STACK_OF(SSL_CIPHER) *sk; 691 SSL_CIPHER *c; 692 unsigned char *p,*d; 693 int i,al,ok; 694 unsigned int j; 695 long n; 696#ifndef OPENSSL_NO_COMP 697 SSL_COMP *comp; 698#endif 699 700 n=s->method->ssl_get_message(s, 701 SSL3_ST_CR_SRVR_HELLO_A, 702 SSL3_ST_CR_SRVR_HELLO_B, 703 -1, 704 20000, /* ?? */ 705 &ok); 706 707 if (!ok) return((int)n); 708 709 if ( SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER) 710 { 711 if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST) 712 { 713 if ( s->d1->send_cookie == 0) 714 { 715 s->s3->tmp.reuse_message = 1; 716 return 1; 717 } 718 else /* already sent a cookie */ 719 { 720 al=SSL_AD_UNEXPECTED_MESSAGE; 721 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE); 722 goto f_err; 723 } 724 } 725 } 726 727 if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO) 728 { 729 al=SSL_AD_UNEXPECTED_MESSAGE; 730 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE); 731 goto f_err; 732 } 733 734 d=p=(unsigned char *)s->init_msg; 735 736 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff))) 737 { 738 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION); 739 s->version=(s->version&0xff00)|p[1]; 740 al=SSL_AD_PROTOCOL_VERSION; 741 goto f_err; 742 } 743 p+=2; 744 745 /* load the server hello data */ 746 /* load the server random */ 747 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE); 748 p+=SSL3_RANDOM_SIZE; 749 750 /* get the session-id */ 751 j= *(p++); 752 753 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE)) 754 { 755 al=SSL_AD_ILLEGAL_PARAMETER; 756 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG); 757 goto f_err; 758 } 759 760 if (j != 0 && j == s->session->session_id_length 761 && memcmp(p,s->session->session_id,j) == 0) 762 { 763 if(s->sid_ctx_length != s->session->sid_ctx_length 764 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length)) 765 { 766 /* actually a client application bug */ 767 al=SSL_AD_ILLEGAL_PARAMETER; 768 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); 769 goto f_err; 770 } 771 s->hit=1; 772 } 773 else /* a miss or crap from the other end */ 774 { 775 /* If we were trying for session-id reuse, make a new 776 * SSL_SESSION so we don't stuff up other people */ 777 s->hit=0; 778 if (s->session->session_id_length > 0) 779 { 780 if (!ssl_get_new_session(s,0)) 781 { 782 al=SSL_AD_INTERNAL_ERROR; 783 goto f_err; 784 } 785 } 786 s->session->session_id_length=j; 787 memcpy(s->session->session_id,p,j); /* j could be 0 */ 788 } 789 p+=j; 790 c=ssl_get_cipher_by_char(s,p); 791 if (c == NULL) 792 { 793 /* unknown cipher */ 794 al=SSL_AD_ILLEGAL_PARAMETER; 795 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED); 796 goto f_err; 797 } 798 p+=ssl_put_cipher_by_char(s,NULL,NULL); 799 800 sk=ssl_get_ciphers_by_id(s); 801 i=sk_SSL_CIPHER_find(sk,c); 802 if (i < 0) 803 { 804 /* we did not say we would use this cipher */ 805 al=SSL_AD_ILLEGAL_PARAMETER; 806 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED); 807 goto f_err; 808 } 809 810 /* Depending on the session caching (internal/external), the cipher 811 and/or cipher_id values may not be set. Make sure that 812 cipher_id is set and use it for comparison. */ 813 if (s->session->cipher) 814 s->session->cipher_id = s->session->cipher->id; 815 if (s->hit && (s->session->cipher_id != c->id)) 816 { 817/* Workaround is now obsolete */ 818#if 0 819 if (!(s->options & 820 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG)) 821#endif 822 { 823 al=SSL_AD_ILLEGAL_PARAMETER; 824 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); 825 goto f_err; 826 } 827 } 828 s->s3->tmp.new_cipher=c; 829 830 /* lets get the compression algorithm */ 831 /* COMPRESSION */ 832#ifdef OPENSSL_NO_COMP 833 if (*(p++) != 0) 834 { 835 al=SSL_AD_ILLEGAL_PARAMETER; 836 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); 837 goto f_err; 838 } 839#else 840 j= *(p++); 841 if (j == 0) 842 comp=NULL; 843 else 844 comp=ssl3_comp_find(s->ctx->comp_methods,j); 845 846 if ((j != 0) && (comp == NULL)) 847 { 848 al=SSL_AD_ILLEGAL_PARAMETER; 849 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); 850 goto f_err; 851 } 852 else 853 { 854 s->s3->tmp.new_compression=comp; 855 } 856#endif 857#ifndef OPENSSL_NO_TLSEXT 858 /* TLS extensions*/ 859 if (s->version >= SSL3_VERSION) 860 { 861 if (!ssl_parse_serverhello_tlsext(s,&p,d,n, &al)) 862 { 863 /* 'al' set by ssl_parse_serverhello_tlsext */ 864 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT); 865 goto f_err; 866 } 867 if (ssl_check_serverhello_tlsext(s) <= 0) 868 { 869 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SERVERHELLO_TLSEXT); 870 goto err; 871 } 872 } 873#endif 874 875 876 if (p != (d+n)) 877 { 878 /* wrong packet length */ 879 al=SSL_AD_DECODE_ERROR; 880 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH); 881 goto f_err; 882 } 883 884 return(1); 885f_err: 886 ssl3_send_alert(s,SSL3_AL_FATAL,al); 887err: 888 return(-1); 889 } 890 891int ssl3_get_server_certificate(SSL *s) 892 { 893 int al,i,ok,ret= -1; 894 unsigned long n,nc,llen,l; 895 X509 *x=NULL; 896 const unsigned char *q,*p; 897 unsigned char *d; 898 STACK_OF(X509) *sk=NULL; 899 SESS_CERT *sc; 900 EVP_PKEY *pkey=NULL; 901 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */ 902 903 n=s->method->ssl_get_message(s, 904 SSL3_ST_CR_CERT_A, 905 SSL3_ST_CR_CERT_B, 906 -1, 907 s->max_cert_list, 908 &ok); 909 910 if (!ok) return((int)n); 911 912 if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) || 913 ((s->s3->tmp.new_cipher->algorithms & SSL_aKRB5) && 914 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE))) 915 { 916 s->s3->tmp.reuse_message=1; 917 return(1); 918 } 919 920 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE) 921 { 922 al=SSL_AD_UNEXPECTED_MESSAGE; 923 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE); 924 goto f_err; 925 } 926 p=d=(unsigned char *)s->init_msg; 927 928 if ((sk=sk_X509_new_null()) == NULL) 929 { 930 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE); 931 goto err; 932 } 933 934 n2l3(p,llen); 935 if (llen+3 != n) 936 { 937 al=SSL_AD_DECODE_ERROR; 938 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH); 939 goto f_err; 940 } 941 for (nc=0; nc<llen; ) 942 { 943 n2l3(p,l); 944 if ((l+nc+3) > llen) 945 { 946 al=SSL_AD_DECODE_ERROR; 947 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); 948 goto f_err; 949 } 950 951 q=p; 952 x=d2i_X509(NULL,&q,l); 953 if (x == NULL) 954 { 955 al=SSL_AD_BAD_CERTIFICATE; 956 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB); 957 goto f_err; 958 } 959 if (q != (p+l)) 960 { 961 al=SSL_AD_DECODE_ERROR; 962 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); 963 goto f_err; 964 } 965 if (!sk_X509_push(sk,x)) 966 { 967 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE); 968 goto err; 969 } 970 x=NULL; 971 nc+=l+3; 972 p=q; 973 } 974 975 i=ssl_verify_cert_chain(s,sk); 976 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0) 977#ifndef OPENSSL_NO_KRB5 978 && (s->s3->tmp.new_cipher->algorithms & (SSL_MKEY_MASK|SSL_AUTH_MASK)) 979 != (SSL_aKRB5|SSL_kKRB5) 980#endif /* OPENSSL_NO_KRB5 */ 981 ) 982 { 983 al=ssl_verify_alarm_type(s->verify_result); 984 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED); 985 goto f_err; 986 } 987 ERR_clear_error(); /* but we keep s->verify_result */ 988 989 sc=ssl_sess_cert_new(); 990 if (sc == NULL) goto err; 991 992 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert); 993 s->session->sess_cert=sc; 994 995 sc->cert_chain=sk; 996 /* Inconsistency alert: cert_chain does include the peer's 997 * certificate, which we don't include in s3_srvr.c */ 998 x=sk_X509_value(sk,0); 999 sk=NULL; 1000 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/ 1001 1002 pkey=X509_get_pubkey(x); 1003 1004 /* VRS: allow null cert if auth == KRB5 */ 1005 need_cert = ((s->s3->tmp.new_cipher->algorithms 1006 & (SSL_MKEY_MASK|SSL_AUTH_MASK)) 1007 == (SSL_aKRB5|SSL_kKRB5))? 0: 1; 1008 1009#ifdef KSSL_DEBUG 1010 printf("pkey,x = %p, %p\n", (void *)pkey,(void *)x); 1011 printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey)); 1012 printf("cipher, alg, nc = %s, %lx, %d\n", s->s3->tmp.new_cipher->name, 1013 s->s3->tmp.new_cipher->algorithms, need_cert); 1014#endif /* KSSL_DEBUG */ 1015 1016 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey))) 1017 { 1018 x=NULL; 1019 al=SSL3_AL_FATAL; 1020 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 1021 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); 1022 goto f_err; 1023 } 1024 1025 i=ssl_cert_type(x,pkey); 1026 if (need_cert && i < 0) 1027 { 1028 x=NULL; 1029 al=SSL3_AL_FATAL; 1030 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 1031 SSL_R_UNKNOWN_CERTIFICATE_TYPE); 1032 goto f_err; 1033 } 1034 1035 if (need_cert) 1036 { 1037 sc->peer_cert_type=i; 1038 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509); 1039 /* Why would the following ever happen? 1040 * We just created sc a couple of lines ago. */ 1041 if (sc->peer_pkeys[i].x509 != NULL) 1042 X509_free(sc->peer_pkeys[i].x509); 1043 sc->peer_pkeys[i].x509=x; 1044 sc->peer_key= &(sc->peer_pkeys[i]); 1045 1046 if (s->session->peer != NULL) 1047 X509_free(s->session->peer); 1048 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509); 1049 s->session->peer=x; 1050 } 1051 else 1052 { 1053 sc->peer_cert_type=i; 1054 sc->peer_key= NULL; 1055 1056 if (s->session->peer != NULL) 1057 X509_free(s->session->peer); 1058 s->session->peer=NULL; 1059 } 1060 s->session->verify_result = s->verify_result; 1061 1062 x=NULL; 1063 ret=1; 1064 1065 if (0) 1066 { 1067f_err: 1068 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1069 } 1070err: 1071 EVP_PKEY_free(pkey); 1072 X509_free(x); 1073 sk_X509_pop_free(sk,X509_free); 1074 return(ret); 1075 } 1076 1077int ssl3_get_key_exchange(SSL *s) 1078 { 1079#ifndef OPENSSL_NO_RSA 1080 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2]; 1081#endif 1082 EVP_MD_CTX md_ctx; 1083 unsigned char *param,*p; 1084 int al,i,j,param_len,ok; 1085 long n,alg; 1086 EVP_PKEY *pkey=NULL; 1087#ifndef OPENSSL_NO_RSA 1088 RSA *rsa=NULL; 1089#endif 1090#ifndef OPENSSL_NO_DH 1091 DH *dh=NULL; 1092#endif 1093#ifndef OPENSSL_NO_ECDH 1094 EC_KEY *ecdh = NULL; 1095 BN_CTX *bn_ctx = NULL; 1096 EC_POINT *srvr_ecpoint = NULL; 1097 int curve_nid = 0; 1098 int encoded_pt_len = 0; 1099#endif 1100 1101 /* use same message size as in ssl3_get_certificate_request() 1102 * as ServerKeyExchange message may be skipped */ 1103 n=s->method->ssl_get_message(s, 1104 SSL3_ST_CR_KEY_EXCH_A, 1105 SSL3_ST_CR_KEY_EXCH_B, 1106 -1, 1107 s->max_cert_list, 1108 &ok); 1109 1110 if (!ok) return((int)n); 1111 1112 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE) 1113 { 1114 s->s3->tmp.reuse_message=1; 1115 return(1); 1116 } 1117 1118 param=p=(unsigned char *)s->init_msg; 1119 1120 if (s->session->sess_cert != NULL) 1121 { 1122#ifndef OPENSSL_NO_RSA 1123 if (s->session->sess_cert->peer_rsa_tmp != NULL) 1124 { 1125 RSA_free(s->session->sess_cert->peer_rsa_tmp); 1126 s->session->sess_cert->peer_rsa_tmp=NULL; 1127 } 1128#endif 1129#ifndef OPENSSL_NO_DH 1130 if (s->session->sess_cert->peer_dh_tmp) 1131 { 1132 DH_free(s->session->sess_cert->peer_dh_tmp); 1133 s->session->sess_cert->peer_dh_tmp=NULL; 1134 } 1135#endif 1136#ifndef OPENSSL_NO_ECDH 1137 if (s->session->sess_cert->peer_ecdh_tmp) 1138 { 1139 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp); 1140 s->session->sess_cert->peer_ecdh_tmp=NULL; 1141 } 1142#endif 1143 } 1144 else 1145 { 1146 s->session->sess_cert=ssl_sess_cert_new(); 1147 } 1148 1149 param_len=0; 1150 alg=s->s3->tmp.new_cipher->algorithms; 1151 EVP_MD_CTX_init(&md_ctx); 1152 1153#ifndef OPENSSL_NO_RSA 1154 if (alg & SSL_kRSA) 1155 { 1156 if ((rsa=RSA_new()) == NULL) 1157 { 1158 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1159 goto err; 1160 } 1161 n2s(p,i); 1162 param_len=i+2; 1163 if (param_len > n) 1164 { 1165 al=SSL_AD_DECODE_ERROR; 1166 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH); 1167 goto f_err; 1168 } 1169 if (!(rsa->n=BN_bin2bn(p,i,rsa->n))) 1170 { 1171 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1172 goto err; 1173 } 1174 p+=i; 1175 1176 n2s(p,i); 1177 param_len+=i+2; 1178 if (param_len > n) 1179 { 1180 al=SSL_AD_DECODE_ERROR; 1181 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH); 1182 goto f_err; 1183 } 1184 if (!(rsa->e=BN_bin2bn(p,i,rsa->e))) 1185 { 1186 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1187 goto err; 1188 } 1189 p+=i; 1190 n-=param_len; 1191 1192 /* this should be because we are using an export cipher */ 1193 if (alg & SSL_aRSA) 1194 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1195 else 1196 { 1197 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1198 goto err; 1199 } 1200 s->session->sess_cert->peer_rsa_tmp=rsa; 1201 rsa=NULL; 1202 } 1203#else /* OPENSSL_NO_RSA */ 1204 if (0) 1205 ; 1206#endif 1207#ifndef OPENSSL_NO_DH 1208 else if (alg & SSL_kEDH) 1209 { 1210 if ((dh=DH_new()) == NULL) 1211 { 1212 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB); 1213 goto err; 1214 } 1215 n2s(p,i); 1216 param_len=i+2; 1217 if (param_len > n) 1218 { 1219 al=SSL_AD_DECODE_ERROR; 1220 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH); 1221 goto f_err; 1222 } 1223 if (!(dh->p=BN_bin2bn(p,i,NULL))) 1224 { 1225 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1226 goto err; 1227 } 1228 p+=i; 1229 1230 n2s(p,i); 1231 param_len+=i+2; 1232 if (param_len > n) 1233 { 1234 al=SSL_AD_DECODE_ERROR; 1235 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH); 1236 goto f_err; 1237 } 1238 if (!(dh->g=BN_bin2bn(p,i,NULL))) 1239 { 1240 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1241 goto err; 1242 } 1243 p+=i; 1244 1245 n2s(p,i); 1246 param_len+=i+2; 1247 if (param_len > n) 1248 { 1249 al=SSL_AD_DECODE_ERROR; 1250 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH); 1251 goto f_err; 1252 } 1253 if (!(dh->pub_key=BN_bin2bn(p,i,NULL))) 1254 { 1255 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1256 goto err; 1257 } 1258 p+=i; 1259 n-=param_len; 1260 1261#ifndef OPENSSL_NO_RSA 1262 if (alg & SSL_aRSA) 1263 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1264#else 1265 if (0) 1266 ; 1267#endif 1268#ifndef OPENSSL_NO_DSA 1269 else if (alg & SSL_aDSS) 1270 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509); 1271#endif 1272 /* else anonymous DH, so no certificate or pkey. */ 1273 1274 s->session->sess_cert->peer_dh_tmp=dh; 1275 dh=NULL; 1276 } 1277 else if ((alg & SSL_kDHr) || (alg & SSL_kDHd)) 1278 { 1279 al=SSL_AD_ILLEGAL_PARAMETER; 1280 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER); 1281 goto f_err; 1282 } 1283#endif /* !OPENSSL_NO_DH */ 1284 1285#ifndef OPENSSL_NO_ECDH 1286 else if (alg & SSL_kECDHE) 1287 { 1288 EC_GROUP *ngroup; 1289 const EC_GROUP *group; 1290 1291 if ((ecdh=EC_KEY_new()) == NULL) 1292 { 1293 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1294 goto err; 1295 } 1296 1297 /* Extract elliptic curve parameters and the 1298 * server's ephemeral ECDH public key. 1299 * Keep accumulating lengths of various components in 1300 * param_len and make sure it never exceeds n. 1301 */ 1302 1303 /* XXX: For now we only support named (not generic) curves 1304 * and the ECParameters in this case is just three bytes. 1305 */ 1306 param_len=3; 1307 if ((param_len > n) || 1308 (*p != NAMED_CURVE_TYPE) || 1309 ((curve_nid = curve_id2nid(*(p + 2))) == 0)) 1310 { 1311 al=SSL_AD_INTERNAL_ERROR; 1312 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); 1313 goto f_err; 1314 } 1315 1316 ngroup = EC_GROUP_new_by_curve_name(curve_nid); 1317 if (ngroup == NULL) 1318 { 1319 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB); 1320 goto err; 1321 } 1322 if (EC_KEY_set_group(ecdh, ngroup) == 0) 1323 { 1324 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB); 1325 goto err; 1326 } 1327 EC_GROUP_free(ngroup); 1328 1329 group = EC_KEY_get0_group(ecdh); 1330 1331 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && 1332 (EC_GROUP_get_degree(group) > 163)) 1333 { 1334 al=SSL_AD_EXPORT_RESTRICTION; 1335 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER); 1336 goto f_err; 1337 } 1338 1339 p+=3; 1340 1341 /* Next, get the encoded ECPoint */ 1342 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) || 1343 ((bn_ctx = BN_CTX_new()) == NULL)) 1344 { 1345 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1346 goto err; 1347 } 1348 1349 encoded_pt_len = *p; /* length of encoded point */ 1350 p+=1; 1351 param_len += (1 + encoded_pt_len); 1352 if ((param_len > n) || 1353 (EC_POINT_oct2point(group, srvr_ecpoint, 1354 p, encoded_pt_len, bn_ctx) == 0)) 1355 { 1356 al=SSL_AD_DECODE_ERROR; 1357 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT); 1358 goto f_err; 1359 } 1360 1361 n-=param_len; 1362 p+=encoded_pt_len; 1363 1364 /* The ECC/TLS specification does not mention 1365 * the use of DSA to sign ECParameters in the server 1366 * key exchange message. We do support RSA and ECDSA. 1367 */ 1368 if (0) ; 1369#ifndef OPENSSL_NO_RSA 1370 else if (alg & SSL_aRSA) 1371 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1372#endif 1373#ifndef OPENSSL_NO_ECDSA 1374 else if (alg & SSL_aECDSA) 1375 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509); 1376#endif 1377 /* else anonymous ECDH, so no certificate or pkey. */ 1378 EC_KEY_set_public_key(ecdh, srvr_ecpoint); 1379 s->session->sess_cert->peer_ecdh_tmp=ecdh; 1380 ecdh=NULL; 1381 BN_CTX_free(bn_ctx); 1382 bn_ctx = NULL; 1383 EC_POINT_free(srvr_ecpoint); 1384 srvr_ecpoint = NULL; 1385 } 1386 else if (alg & SSL_kECDH) 1387 { 1388 al=SSL_AD_UNEXPECTED_MESSAGE; 1389 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE); 1390 goto f_err; 1391 } 1392#endif /* !OPENSSL_NO_ECDH */ 1393 if (alg & SSL_aFZA) 1394 { 1395 al=SSL_AD_HANDSHAKE_FAILURE; 1396 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER); 1397 goto f_err; 1398 } 1399 1400 1401 /* p points to the next byte, there are 'n' bytes left */ 1402 1403 /* if it was signed, check the signature */ 1404 if (pkey != NULL) 1405 { 1406 n2s(p,i); 1407 n-=2; 1408 j=EVP_PKEY_size(pkey); 1409 1410 if ((i != n) || (n > j) || (n <= 0)) 1411 { 1412 /* wrong packet length */ 1413 al=SSL_AD_DECODE_ERROR; 1414 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH); 1415 goto f_err; 1416 } 1417 1418#ifndef OPENSSL_NO_RSA 1419 if (pkey->type == EVP_PKEY_RSA) 1420 { 1421 int num; 1422 1423 j=0; 1424 q=md_buf; 1425 for (num=2; num > 0; num--) 1426 { 1427 EVP_MD_CTX_set_flags(&md_ctx, 1428 EVP_MD_CTX_FLAG_NON_FIPS_ALLOW); 1429 EVP_DigestInit_ex(&md_ctx,(num == 2) 1430 ?s->ctx->md5:s->ctx->sha1, NULL); 1431 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); 1432 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); 1433 EVP_DigestUpdate(&md_ctx,param,param_len); 1434 EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i); 1435 q+=i; 1436 j+=i; 1437 } 1438 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n, 1439 pkey->pkey.rsa); 1440 if (i < 0) 1441 { 1442 al=SSL_AD_DECRYPT_ERROR; 1443 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT); 1444 goto f_err; 1445 } 1446 if (i == 0) 1447 { 1448 /* bad signature */ 1449 al=SSL_AD_DECRYPT_ERROR; 1450 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE); 1451 goto f_err; 1452 } 1453 } 1454 else 1455#endif 1456#ifndef OPENSSL_NO_DSA 1457 if (pkey->type == EVP_PKEY_DSA) 1458 { 1459 /* lets do DSS */ 1460 EVP_VerifyInit_ex(&md_ctx,EVP_dss1(), NULL); 1461 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); 1462 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); 1463 EVP_VerifyUpdate(&md_ctx,param,param_len); 1464 if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0) 1465 { 1466 /* bad signature */ 1467 al=SSL_AD_DECRYPT_ERROR; 1468 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE); 1469 goto f_err; 1470 } 1471 } 1472 else 1473#endif 1474#ifndef OPENSSL_NO_ECDSA 1475 if (pkey->type == EVP_PKEY_EC) 1476 { 1477 /* let's do ECDSA */ 1478 EVP_VerifyInit_ex(&md_ctx,EVP_ecdsa(), NULL); 1479 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); 1480 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); 1481 EVP_VerifyUpdate(&md_ctx,param,param_len); 1482 if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0) 1483 { 1484 /* bad signature */ 1485 al=SSL_AD_DECRYPT_ERROR; 1486 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE); 1487 goto f_err; 1488 } 1489 } 1490 else 1491#endif 1492 { 1493 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1494 goto err; 1495 } 1496 } 1497 else 1498 { 1499 /* still data left over */ 1500 if (!(alg & SSL_aNULL)) 1501 { 1502 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1503 goto err; 1504 } 1505 if (n != 0) 1506 { 1507 al=SSL_AD_DECODE_ERROR; 1508 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE); 1509 goto f_err; 1510 } 1511 } 1512 EVP_PKEY_free(pkey); 1513 EVP_MD_CTX_cleanup(&md_ctx); 1514 return(1); 1515f_err: 1516 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1517err: 1518 EVP_PKEY_free(pkey); 1519#ifndef OPENSSL_NO_RSA 1520 if (rsa != NULL) 1521 RSA_free(rsa); 1522#endif 1523#ifndef OPENSSL_NO_DH 1524 if (dh != NULL) 1525 DH_free(dh); 1526#endif 1527#ifndef OPENSSL_NO_ECDH 1528 BN_CTX_free(bn_ctx); 1529 EC_POINT_free(srvr_ecpoint); 1530 if (ecdh != NULL) 1531 EC_KEY_free(ecdh); 1532#endif 1533 EVP_MD_CTX_cleanup(&md_ctx); 1534 return(-1); 1535 } 1536 1537int ssl3_get_certificate_request(SSL *s) 1538 { 1539 int ok,ret=0; 1540 unsigned long n,nc,l; 1541 unsigned int llen,ctype_num,i; 1542 X509_NAME *xn=NULL; 1543 const unsigned char *p,*q; 1544 unsigned char *d; 1545 STACK_OF(X509_NAME) *ca_sk=NULL; 1546 1547 n=s->method->ssl_get_message(s, 1548 SSL3_ST_CR_CERT_REQ_A, 1549 SSL3_ST_CR_CERT_REQ_B, 1550 -1, 1551 s->max_cert_list, 1552 &ok); 1553 1554 if (!ok) return((int)n); 1555 1556 s->s3->tmp.cert_req=0; 1557 1558 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE) 1559 { 1560 s->s3->tmp.reuse_message=1; 1561 return(1); 1562 } 1563 1564 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST) 1565 { 1566 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 1567 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE); 1568 goto err; 1569 } 1570 1571 /* TLS does not like anon-DH with client cert */ 1572 if (s->version > SSL3_VERSION) 1573 { 1574 l=s->s3->tmp.new_cipher->algorithms; 1575 if (l & SSL_aNULL) 1576 { 1577 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 1578 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER); 1579 goto err; 1580 } 1581 } 1582 1583 p=d=(unsigned char *)s->init_msg; 1584 1585 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL) 1586 { 1587 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE); 1588 goto err; 1589 } 1590 1591 /* get the certificate types */ 1592 ctype_num= *(p++); 1593 if (ctype_num > SSL3_CT_NUMBER) 1594 ctype_num=SSL3_CT_NUMBER; 1595 for (i=0; i<ctype_num; i++) 1596 s->s3->tmp.ctype[i]= p[i]; 1597 p+=ctype_num; 1598 1599 /* get the CA RDNs */ 1600 n2s(p,llen); 1601#if 0 1602{ 1603FILE *out; 1604out=fopen("/tmp/vsign.der","w"); 1605fwrite(p,1,llen,out); 1606fclose(out); 1607} 1608#endif 1609 1610 if ((llen+ctype_num+2+1) != n) 1611 { 1612 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1613 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH); 1614 goto err; 1615 } 1616 1617 for (nc=0; nc<llen; ) 1618 { 1619 n2s(p,l); 1620 if ((l+nc+2) > llen) 1621 { 1622 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG)) 1623 goto cont; /* netscape bugs */ 1624 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1625 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG); 1626 goto err; 1627 } 1628 1629 q=p; 1630 1631 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL) 1632 { 1633 /* If netscape tolerance is on, ignore errors */ 1634 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG) 1635 goto cont; 1636 else 1637 { 1638 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1639 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB); 1640 goto err; 1641 } 1642 } 1643 1644 if (q != (p+l)) 1645 { 1646 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1647 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH); 1648 goto err; 1649 } 1650 if (!sk_X509_NAME_push(ca_sk,xn)) 1651 { 1652 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE); 1653 goto err; 1654 } 1655 1656 p+=l; 1657 nc+=l+2; 1658 } 1659 1660 if (0) 1661 { 1662cont: 1663 ERR_clear_error(); 1664 } 1665 1666 /* we should setup a certificate to return.... */ 1667 s->s3->tmp.cert_req=1; 1668 s->s3->tmp.ctype_num=ctype_num; 1669 if (s->s3->tmp.ca_names != NULL) 1670 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free); 1671 s->s3->tmp.ca_names=ca_sk; 1672 ca_sk=NULL; 1673 1674 ret=1; 1675err: 1676 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free); 1677 return(ret); 1678 } 1679 1680static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b) 1681 { 1682 return(X509_NAME_cmp(*a,*b)); 1683 } 1684#ifndef OPENSSL_NO_TLSEXT 1685int ssl3_get_new_session_ticket(SSL *s) 1686 { 1687 int ok,al,ret=0, ticklen; 1688 long n; 1689 const unsigned char *p; 1690 unsigned char *d; 1691 1692 n=s->method->ssl_get_message(s, 1693 SSL3_ST_CR_SESSION_TICKET_A, 1694 SSL3_ST_CR_SESSION_TICKET_B, 1695 -1, 1696 16384, 1697 &ok); 1698 1699 if (!ok) 1700 return((int)n); 1701 1702 if (s->s3->tmp.message_type == SSL3_MT_FINISHED) 1703 { 1704 s->s3->tmp.reuse_message=1; 1705 return(1); 1706 } 1707 if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET) 1708 { 1709 al=SSL_AD_UNEXPECTED_MESSAGE; 1710 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_BAD_MESSAGE_TYPE); 1711 goto f_err; 1712 } 1713 if (n < 6) 1714 { 1715 /* need at least ticket_lifetime_hint + ticket length */ 1716 al = SSL_AD_DECODE_ERROR; 1717 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH); 1718 goto f_err; 1719 } 1720 1721 p=d=(unsigned char *)s->init_msg; 1722 n2l(p, s->session->tlsext_tick_lifetime_hint); 1723 n2s(p, ticklen); 1724 /* ticket_lifetime_hint + ticket_length + ticket */ 1725 if (ticklen + 6 != n) 1726 { 1727 al = SSL_AD_DECODE_ERROR; 1728 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH); 1729 goto f_err; 1730 } 1731 if (s->session->tlsext_tick) 1732 { 1733 OPENSSL_free(s->session->tlsext_tick); 1734 s->session->tlsext_ticklen = 0; 1735 } 1736 s->session->tlsext_tick = OPENSSL_malloc(ticklen); 1737 if (!s->session->tlsext_tick) 1738 { 1739 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE); 1740 goto err; 1741 } 1742 memcpy(s->session->tlsext_tick, p, ticklen); 1743 s->session->tlsext_ticklen = ticklen; 1744 /* There are two ways to detect a resumed ticket sesion. 1745 * One is to set an appropriate session ID and then the server 1746 * must return a match in ServerHello. This allows the normal 1747 * client session ID matching to work and we know much 1748 * earlier that the ticket has been accepted. 1749 * 1750 * The other way is to set zero length session ID when the 1751 * ticket is presented and rely on the handshake to determine 1752 * session resumption. 1753 * 1754 * We choose the former approach because this fits in with 1755 * assumptions elsewhere in OpenSSL. The session ID is set 1756 * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the 1757 * ticket. 1758 */ 1759 EVP_Digest(p, ticklen, 1760 s->session->session_id, &s->session->session_id_length, 1761#ifndef OPENSSL_NO_SHA256 1762 EVP_sha256(), NULL); 1763#else 1764 EVP_sha1(), NULL); 1765#endif 1766 ret=1; 1767 return(ret); 1768f_err: 1769 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1770err: 1771 return(-1); 1772 } 1773 1774int ssl3_get_cert_status(SSL *s) 1775 { 1776 int ok, al; 1777 unsigned long resplen; 1778 long n; 1779 const unsigned char *p; 1780 1781 n=s->method->ssl_get_message(s, 1782 SSL3_ST_CR_CERT_STATUS_A, 1783 SSL3_ST_CR_CERT_STATUS_B, 1784 SSL3_MT_CERTIFICATE_STATUS, 1785 16384, 1786 &ok); 1787 1788 if (!ok) return((int)n); 1789 if (n < 4) 1790 { 1791 /* need at least status type + length */ 1792 al = SSL_AD_DECODE_ERROR; 1793 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH); 1794 goto f_err; 1795 } 1796 p = (unsigned char *)s->init_msg; 1797 if (*p++ != TLSEXT_STATUSTYPE_ocsp) 1798 { 1799 al = SSL_AD_DECODE_ERROR; 1800 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_UNSUPPORTED_STATUS_TYPE); 1801 goto f_err; 1802 } 1803 n2l3(p, resplen); 1804 if (resplen + 4 != (unsigned long)n) 1805 { 1806 al = SSL_AD_DECODE_ERROR; 1807 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH); 1808 goto f_err; 1809 } 1810 if (s->tlsext_ocsp_resp) 1811 OPENSSL_free(s->tlsext_ocsp_resp); 1812 s->tlsext_ocsp_resp = BUF_memdup(p, resplen); 1813 if (!s->tlsext_ocsp_resp) 1814 { 1815 al = SSL_AD_INTERNAL_ERROR; 1816 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE); 1817 goto f_err; 1818 } 1819 s->tlsext_ocsp_resplen = resplen; 1820 if (s->ctx->tlsext_status_cb) 1821 { 1822 int ret; 1823 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg); 1824 if (ret == 0) 1825 { 1826 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE; 1827 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_INVALID_STATUS_RESPONSE); 1828 goto f_err; 1829 } 1830 if (ret < 0) 1831 { 1832 al = SSL_AD_INTERNAL_ERROR; 1833 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE); 1834 goto f_err; 1835 } 1836 } 1837 return 1; 1838f_err: 1839 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1840 return(-1); 1841 } 1842#endif 1843 1844int ssl3_get_server_done(SSL *s) 1845 { 1846 int ok,ret=0; 1847 long n; 1848 1849 n=s->method->ssl_get_message(s, 1850 SSL3_ST_CR_SRVR_DONE_A, 1851 SSL3_ST_CR_SRVR_DONE_B, 1852 SSL3_MT_SERVER_DONE, 1853 30, /* should be very small, like 0 :-) */ 1854 &ok); 1855 1856 if (!ok) return((int)n); 1857 if (n > 0) 1858 { 1859 /* should contain no data */ 1860 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1861 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH); 1862 return -1; 1863 } 1864 ret=1; 1865 return(ret); 1866 } 1867 1868 1869int ssl3_send_client_key_exchange(SSL *s) 1870 { 1871 unsigned char *p,*d; 1872 int n; 1873 unsigned long l; 1874#ifndef OPENSSL_NO_RSA 1875 unsigned char *q; 1876 EVP_PKEY *pkey=NULL; 1877#endif 1878#ifndef OPENSSL_NO_KRB5 1879 KSSL_ERR kssl_err; 1880#endif /* OPENSSL_NO_KRB5 */ 1881#ifndef OPENSSL_NO_ECDH 1882 EC_KEY *clnt_ecdh = NULL; 1883 const EC_POINT *srvr_ecpoint = NULL; 1884 EVP_PKEY *srvr_pub_pkey = NULL; 1885 unsigned char *encodedPoint = NULL; 1886 int encoded_pt_len = 0; 1887 BN_CTX * bn_ctx = NULL; 1888#endif 1889 1890 if (s->state == SSL3_ST_CW_KEY_EXCH_A) 1891 { 1892 d=(unsigned char *)s->init_buf->data; 1893 p= &(d[4]); 1894 1895 l=s->s3->tmp.new_cipher->algorithms; 1896 1897 /* Fool emacs indentation */ 1898 if (0) {} 1899#ifndef OPENSSL_NO_RSA 1900 else if (l & SSL_kRSA) 1901 { 1902 RSA *rsa; 1903 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; 1904 1905 if (s->session->sess_cert->peer_rsa_tmp != NULL) 1906 rsa=s->session->sess_cert->peer_rsa_tmp; 1907 else 1908 { 1909 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1910 if ((pkey == NULL) || 1911 (pkey->type != EVP_PKEY_RSA) || 1912 (pkey->pkey.rsa == NULL)) 1913 { 1914 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1915 goto err; 1916 } 1917 rsa=pkey->pkey.rsa; 1918 EVP_PKEY_free(pkey); 1919 } 1920 1921 tmp_buf[0]=s->client_version>>8; 1922 tmp_buf[1]=s->client_version&0xff; 1923 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0) 1924 goto err; 1925 1926 s->session->master_key_length=sizeof tmp_buf; 1927 1928 q=p; 1929 /* Fix buf for TLS and beyond */ 1930 if (s->version > SSL3_VERSION) 1931 p+=2; 1932 n=RSA_public_encrypt(sizeof tmp_buf, 1933 tmp_buf,p,rsa,RSA_PKCS1_PADDING); 1934#ifdef PKCS1_CHECK 1935 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++; 1936 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70; 1937#endif 1938 if (n <= 0) 1939 { 1940 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT); 1941 goto err; 1942 } 1943 1944 /* Fix buf for TLS and beyond */ 1945 if (s->version > SSL3_VERSION) 1946 { 1947 s2n(n,q); 1948 n+=2; 1949 } 1950 1951 s->session->master_key_length= 1952 s->method->ssl3_enc->generate_master_secret(s, 1953 s->session->master_key, 1954 tmp_buf,sizeof tmp_buf); 1955 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf); 1956 } 1957#endif 1958#ifndef OPENSSL_NO_KRB5 1959 else if (l & SSL_kKRB5) 1960 { 1961 krb5_error_code krb5rc; 1962 KSSL_CTX *kssl_ctx = s->kssl_ctx; 1963 /* krb5_data krb5_ap_req; */ 1964 krb5_data *enc_ticket; 1965 krb5_data authenticator, *authp = NULL; 1966 EVP_CIPHER_CTX ciph_ctx; 1967 EVP_CIPHER *enc = NULL; 1968 unsigned char iv[EVP_MAX_IV_LENGTH]; 1969 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; 1970 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH 1971 + EVP_MAX_IV_LENGTH]; 1972 int padl, outl = sizeof(epms); 1973 1974 EVP_CIPHER_CTX_init(&ciph_ctx); 1975 1976#ifdef KSSL_DEBUG 1977 printf("ssl3_send_client_key_exchange(%lx & %lx)\n", 1978 l, SSL_kKRB5); 1979#endif /* KSSL_DEBUG */ 1980 1981 authp = NULL; 1982#ifdef KRB5SENDAUTH 1983 if (KRB5SENDAUTH) authp = &authenticator; 1984#endif /* KRB5SENDAUTH */ 1985 1986 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp, 1987 &kssl_err); 1988 enc = kssl_map_enc(kssl_ctx->enctype); 1989 if (enc == NULL) 1990 goto err; 1991#ifdef KSSL_DEBUG 1992 { 1993 printf("kssl_cget_tkt rtn %d\n", krb5rc); 1994 if (krb5rc && kssl_err.text) 1995 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text); 1996 } 1997#endif /* KSSL_DEBUG */ 1998 1999 if (krb5rc) 2000 { 2001 ssl3_send_alert(s,SSL3_AL_FATAL, 2002 SSL_AD_HANDSHAKE_FAILURE); 2003 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2004 kssl_err.reason); 2005 goto err; 2006 } 2007 2008 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ 2009 ** in place of RFC 2712 KerberosWrapper, as in: 2010 ** 2011 ** Send ticket (copy to *p, set n = length) 2012 ** n = krb5_ap_req.length; 2013 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length); 2014 ** if (krb5_ap_req.data) 2015 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req); 2016 ** 2017 ** Now using real RFC 2712 KerberosWrapper 2018 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>) 2019 ** Note: 2712 "opaque" types are here replaced 2020 ** with a 2-byte length followed by the value. 2021 ** Example: 2022 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms 2023 ** Where "xx xx" = length bytes. Shown here with 2024 ** optional authenticator omitted. 2025 */ 2026 2027 /* KerberosWrapper.Ticket */ 2028 s2n(enc_ticket->length,p); 2029 memcpy(p, enc_ticket->data, enc_ticket->length); 2030 p+= enc_ticket->length; 2031 n = enc_ticket->length + 2; 2032 2033 /* KerberosWrapper.Authenticator */ 2034 if (authp && authp->length) 2035 { 2036 s2n(authp->length,p); 2037 memcpy(p, authp->data, authp->length); 2038 p+= authp->length; 2039 n+= authp->length + 2; 2040 2041 free(authp->data); 2042 authp->data = NULL; 2043 authp->length = 0; 2044 } 2045 else 2046 { 2047 s2n(0,p);/* null authenticator length */ 2048 n+=2; 2049 } 2050 2051 tmp_buf[0]=s->client_version>>8; 2052 tmp_buf[1]=s->client_version&0xff; 2053 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0) 2054 goto err; 2055 2056 /* 20010420 VRS. Tried it this way; failed. 2057 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL); 2058 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx, 2059 ** kssl_ctx->length); 2060 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv); 2061 */ 2062 2063 memset(iv, 0, sizeof iv); /* per RFC 1510 */ 2064 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL, 2065 kssl_ctx->key,iv); 2066 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf, 2067 sizeof tmp_buf); 2068 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl); 2069 outl += padl; 2070 if (outl > sizeof epms) 2071 { 2072 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); 2073 goto err; 2074 } 2075 EVP_CIPHER_CTX_cleanup(&ciph_ctx); 2076 2077 /* KerberosWrapper.EncryptedPreMasterSecret */ 2078 s2n(outl,p); 2079 memcpy(p, epms, outl); 2080 p+=outl; 2081 n+=outl + 2; 2082 2083 s->session->master_key_length= 2084 s->method->ssl3_enc->generate_master_secret(s, 2085 s->session->master_key, 2086 tmp_buf, sizeof tmp_buf); 2087 2088 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf); 2089 OPENSSL_cleanse(epms, outl); 2090 } 2091#endif 2092#ifndef OPENSSL_NO_DH 2093 else if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) 2094 { 2095 DH *dh_srvr,*dh_clnt; 2096 2097 if (s->session->sess_cert == NULL) 2098 { 2099 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 2100 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE); 2101 goto err; 2102 } 2103 2104 if (s->session->sess_cert->peer_dh_tmp != NULL) 2105 dh_srvr=s->session->sess_cert->peer_dh_tmp; 2106 else 2107 { 2108 /* we get them from the cert */ 2109 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); 2110 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS); 2111 goto err; 2112 } 2113 2114 /* generate a new random key */ 2115 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL) 2116 { 2117 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 2118 goto err; 2119 } 2120 if (!DH_generate_key(dh_clnt)) 2121 { 2122 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 2123 goto err; 2124 } 2125 2126 /* use the 'p' output buffer for the DH key, but 2127 * make sure to clear it out afterwards */ 2128 2129 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt); 2130 2131 if (n <= 0) 2132 { 2133 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 2134 goto err; 2135 } 2136 2137 /* generate master key from the result */ 2138 s->session->master_key_length= 2139 s->method->ssl3_enc->generate_master_secret(s, 2140 s->session->master_key,p,n); 2141 /* clean up */ 2142 memset(p,0,n); 2143 2144 /* send off the data */ 2145 n=BN_num_bytes(dh_clnt->pub_key); 2146 s2n(n,p); 2147 BN_bn2bin(dh_clnt->pub_key,p); 2148 n+=2; 2149 2150 DH_free(dh_clnt); 2151 2152 /* perhaps clean things up a bit EAY EAY EAY EAY*/ 2153 } 2154#endif 2155 2156#ifndef OPENSSL_NO_ECDH 2157 else if ((l & SSL_kECDH) || (l & SSL_kECDHE)) 2158 { 2159 const EC_GROUP *srvr_group = NULL; 2160 EC_KEY *tkey; 2161 int ecdh_clnt_cert = 0; 2162 int field_size = 0; 2163 2164 /* Did we send out the client's 2165 * ECDH share for use in premaster 2166 * computation as part of client certificate? 2167 * If so, set ecdh_clnt_cert to 1. 2168 */ 2169 if ((l & SSL_kECDH) && (s->cert != NULL)) 2170 { 2171 /* XXX: For now, we do not support client 2172 * authentication using ECDH certificates. 2173 * To add such support, one needs to add 2174 * code that checks for appropriate 2175 * conditions and sets ecdh_clnt_cert to 1. 2176 * For example, the cert have an ECC 2177 * key on the same curve as the server's 2178 * and the key should be authorized for 2179 * key agreement. 2180 * 2181 * One also needs to add code in ssl3_connect 2182 * to skip sending the certificate verify 2183 * message. 2184 * 2185 * if ((s->cert->key->privatekey != NULL) && 2186 * (s->cert->key->privatekey->type == 2187 * EVP_PKEY_EC) && ...) 2188 * ecdh_clnt_cert = 1; 2189 */ 2190 } 2191 2192 if (s->session->sess_cert->peer_ecdh_tmp != NULL) 2193 { 2194 tkey = s->session->sess_cert->peer_ecdh_tmp; 2195 } 2196 else 2197 { 2198 /* Get the Server Public Key from Cert */ 2199 srvr_pub_pkey = X509_get_pubkey(s->session-> \ 2200 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509); 2201 if ((srvr_pub_pkey == NULL) || 2202 (srvr_pub_pkey->type != EVP_PKEY_EC) || 2203 (srvr_pub_pkey->pkey.ec == NULL)) 2204 { 2205 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2206 ERR_R_INTERNAL_ERROR); 2207 goto err; 2208 } 2209 2210 tkey = srvr_pub_pkey->pkey.ec; 2211 } 2212 2213 srvr_group = EC_KEY_get0_group(tkey); 2214 srvr_ecpoint = EC_KEY_get0_public_key(tkey); 2215 2216 if ((srvr_group == NULL) || (srvr_ecpoint == NULL)) 2217 { 2218 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2219 ERR_R_INTERNAL_ERROR); 2220 goto err; 2221 } 2222 2223 if ((clnt_ecdh=EC_KEY_new()) == NULL) 2224 { 2225 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2226 goto err; 2227 } 2228 2229 if (!EC_KEY_set_group(clnt_ecdh, srvr_group)) 2230 { 2231 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB); 2232 goto err; 2233 } 2234 if (ecdh_clnt_cert) 2235 { 2236 /* Reuse key info from our certificate 2237 * We only need our private key to perform 2238 * the ECDH computation. 2239 */ 2240 const BIGNUM *priv_key; 2241 tkey = s->cert->key->privatekey->pkey.ec; 2242 priv_key = EC_KEY_get0_private_key(tkey); 2243 if (priv_key == NULL) 2244 { 2245 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2246 goto err; 2247 } 2248 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key)) 2249 { 2250 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB); 2251 goto err; 2252 } 2253 } 2254 else 2255 { 2256 /* Generate a new ECDH key pair */ 2257 if (!(EC_KEY_generate_key(clnt_ecdh))) 2258 { 2259 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB); 2260 goto err; 2261 } 2262 } 2263 2264 /* use the 'p' output buffer for the ECDH key, but 2265 * make sure to clear it out afterwards 2266 */ 2267 2268 field_size = EC_GROUP_get_degree(srvr_group); 2269 if (field_size <= 0) 2270 { 2271 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2272 ERR_R_ECDH_LIB); 2273 goto err; 2274 } 2275 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL); 2276 if (n <= 0) 2277 { 2278 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2279 ERR_R_ECDH_LIB); 2280 goto err; 2281 } 2282 2283 /* generate master key from the result */ 2284 s->session->master_key_length = s->method->ssl3_enc \ 2285 -> generate_master_secret(s, 2286 s->session->master_key, 2287 p, n); 2288 2289 memset(p, 0, n); /* clean up */ 2290 2291 if (ecdh_clnt_cert) 2292 { 2293 /* Send empty client key exch message */ 2294 n = 0; 2295 } 2296 else 2297 { 2298 /* First check the size of encoding and 2299 * allocate memory accordingly. 2300 */ 2301 encoded_pt_len = 2302 EC_POINT_point2oct(srvr_group, 2303 EC_KEY_get0_public_key(clnt_ecdh), 2304 POINT_CONVERSION_UNCOMPRESSED, 2305 NULL, 0, NULL); 2306 2307 encodedPoint = (unsigned char *) 2308 OPENSSL_malloc(encoded_pt_len * 2309 sizeof(unsigned char)); 2310 bn_ctx = BN_CTX_new(); 2311 if ((encodedPoint == NULL) || 2312 (bn_ctx == NULL)) 2313 { 2314 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2315 goto err; 2316 } 2317 2318 /* Encode the public key */ 2319 n = EC_POINT_point2oct(srvr_group, 2320 EC_KEY_get0_public_key(clnt_ecdh), 2321 POINT_CONVERSION_UNCOMPRESSED, 2322 encodedPoint, encoded_pt_len, bn_ctx); 2323 2324 *p = n; /* length of encoded point */ 2325 /* Encoded point will be copied here */ 2326 p += 1; 2327 /* copy the point */ 2328 memcpy((unsigned char *)p, encodedPoint, n); 2329 /* increment n to account for length field */ 2330 n += 1; 2331 } 2332 2333 /* Free allocated memory */ 2334 BN_CTX_free(bn_ctx); 2335 if (encodedPoint != NULL) OPENSSL_free(encodedPoint); 2336 if (clnt_ecdh != NULL) 2337 EC_KEY_free(clnt_ecdh); 2338 EVP_PKEY_free(srvr_pub_pkey); 2339 } 2340#endif /* !OPENSSL_NO_ECDH */ 2341 else 2342 { 2343 ssl3_send_alert(s, SSL3_AL_FATAL, 2344 SSL_AD_HANDSHAKE_FAILURE); 2345 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2346 ERR_R_INTERNAL_ERROR); 2347 goto err; 2348 } 2349 2350 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE; 2351 l2n3(n,d); 2352 2353 s->state=SSL3_ST_CW_KEY_EXCH_B; 2354 /* number of bytes to write */ 2355 s->init_num=n+4; 2356 s->init_off=0; 2357 } 2358 2359 /* SSL3_ST_CW_KEY_EXCH_B */ 2360 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 2361err: 2362#ifndef OPENSSL_NO_ECDH 2363 BN_CTX_free(bn_ctx); 2364 if (encodedPoint != NULL) OPENSSL_free(encodedPoint); 2365 if (clnt_ecdh != NULL) 2366 EC_KEY_free(clnt_ecdh); 2367 EVP_PKEY_free(srvr_pub_pkey); 2368#endif 2369 return(-1); 2370 } 2371 2372int ssl3_send_client_verify(SSL *s) 2373 { 2374 unsigned char *p,*d; 2375 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH]; 2376 EVP_PKEY *pkey; 2377#ifndef OPENSSL_NO_RSA 2378 unsigned u=0; 2379#endif 2380 unsigned long n; 2381#if !defined(OPENSSL_NO_DSA) || !defined(OPENSSL_NO_ECDSA) 2382 int j; 2383#endif 2384 2385 if (s->state == SSL3_ST_CW_CERT_VRFY_A) 2386 { 2387 d=(unsigned char *)s->init_buf->data; 2388 p= &(d[4]); 2389 pkey=s->cert->key->privatekey; 2390 2391 s->method->ssl3_enc->cert_verify_mac(s,&(s->s3->finish_dgst2), 2392 &(data[MD5_DIGEST_LENGTH])); 2393 2394#ifndef OPENSSL_NO_RSA 2395 if (pkey->type == EVP_PKEY_RSA) 2396 { 2397 s->method->ssl3_enc->cert_verify_mac(s, 2398 &(s->s3->finish_dgst1),&(data[0])); 2399 if (RSA_sign(NID_md5_sha1, data, 2400 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH, 2401 &(p[2]), &u, pkey->pkey.rsa) <= 0 ) 2402 { 2403 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB); 2404 goto err; 2405 } 2406 s2n(u,p); 2407 n=u+2; 2408 } 2409 else 2410#endif 2411#ifndef OPENSSL_NO_DSA 2412 if (pkey->type == EVP_PKEY_DSA) 2413 { 2414 if (!DSA_sign(pkey->save_type, 2415 &(data[MD5_DIGEST_LENGTH]), 2416 SHA_DIGEST_LENGTH,&(p[2]), 2417 (unsigned int *)&j,pkey->pkey.dsa)) 2418 { 2419 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB); 2420 goto err; 2421 } 2422 s2n(j,p); 2423 n=j+2; 2424 } 2425 else 2426#endif 2427#ifndef OPENSSL_NO_ECDSA 2428 if (pkey->type == EVP_PKEY_EC) 2429 { 2430 if (!ECDSA_sign(pkey->save_type, 2431 &(data[MD5_DIGEST_LENGTH]), 2432 SHA_DIGEST_LENGTH,&(p[2]), 2433 (unsigned int *)&j,pkey->pkey.ec)) 2434 { 2435 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, 2436 ERR_R_ECDSA_LIB); 2437 goto err; 2438 } 2439 s2n(j,p); 2440 n=j+2; 2441 } 2442 else 2443#endif 2444 { 2445 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR); 2446 goto err; 2447 } 2448 *(d++)=SSL3_MT_CERTIFICATE_VERIFY; 2449 l2n3(n,d); 2450 2451 s->state=SSL3_ST_CW_CERT_VRFY_B; 2452 s->init_num=(int)n+4; 2453 s->init_off=0; 2454 } 2455 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 2456err: 2457 return(-1); 2458 } 2459 2460int ssl3_send_client_certificate(SSL *s) 2461 { 2462 X509 *x509=NULL; 2463 EVP_PKEY *pkey=NULL; 2464 int i; 2465 unsigned long l; 2466 2467 if (s->state == SSL3_ST_CW_CERT_A) 2468 { 2469 if ((s->cert == NULL) || 2470 (s->cert->key->x509 == NULL) || 2471 (s->cert->key->privatekey == NULL)) 2472 s->state=SSL3_ST_CW_CERT_B; 2473 else 2474 s->state=SSL3_ST_CW_CERT_C; 2475 } 2476 2477 /* We need to get a client cert */ 2478 if (s->state == SSL3_ST_CW_CERT_B) 2479 { 2480 /* If we get an error, we need to 2481 * ssl->rwstate=SSL_X509_LOOKUP; return(-1); 2482 * We then get retied later */ 2483 i=0; 2484 i = ssl_do_client_cert_cb(s, &x509, &pkey); 2485 if (i < 0) 2486 { 2487 s->rwstate=SSL_X509_LOOKUP; 2488 return(-1); 2489 } 2490 s->rwstate=SSL_NOTHING; 2491 if ((i == 1) && (pkey != NULL) && (x509 != NULL)) 2492 { 2493 s->state=SSL3_ST_CW_CERT_B; 2494 if ( !SSL_use_certificate(s,x509) || 2495 !SSL_use_PrivateKey(s,pkey)) 2496 i=0; 2497 } 2498 else if (i == 1) 2499 { 2500 i=0; 2501 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); 2502 } 2503 2504 if (x509 != NULL) X509_free(x509); 2505 if (pkey != NULL) EVP_PKEY_free(pkey); 2506 if (i == 0) 2507 { 2508 if (s->version == SSL3_VERSION) 2509 { 2510 s->s3->tmp.cert_req=0; 2511 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE); 2512 return(1); 2513 } 2514 else 2515 { 2516 s->s3->tmp.cert_req=2; 2517 } 2518 } 2519 2520 /* Ok, we have a cert */ 2521 s->state=SSL3_ST_CW_CERT_C; 2522 } 2523 2524 if (s->state == SSL3_ST_CW_CERT_C) 2525 { 2526 s->state=SSL3_ST_CW_CERT_D; 2527 l=ssl3_output_cert_chain(s, 2528 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509); 2529 s->init_num=(int)l; 2530 s->init_off=0; 2531 } 2532 /* SSL3_ST_CW_CERT_D */ 2533 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 2534 } 2535 2536#define has_bits(i,m) (((i)&(m)) == (m)) 2537 2538int ssl3_check_cert_and_algorithm(SSL *s) 2539 { 2540 int i,idx; 2541 long algs; 2542 EVP_PKEY *pkey=NULL; 2543 SESS_CERT *sc; 2544#ifndef OPENSSL_NO_RSA 2545 RSA *rsa; 2546#endif 2547#ifndef OPENSSL_NO_DH 2548 DH *dh; 2549#endif 2550 2551 sc=s->session->sess_cert; 2552 2553 algs=s->s3->tmp.new_cipher->algorithms; 2554 2555 /* we don't have a certificate */ 2556 if (algs & (SSL_aDH|SSL_aNULL|SSL_aKRB5)) 2557 return(1); 2558 2559 if (sc == NULL) 2560 { 2561 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR); 2562 goto err; 2563 } 2564 2565#ifndef OPENSSL_NO_RSA 2566 rsa=s->session->sess_cert->peer_rsa_tmp; 2567#endif 2568#ifndef OPENSSL_NO_DH 2569 dh=s->session->sess_cert->peer_dh_tmp; 2570#endif 2571 2572 /* This is the passed certificate */ 2573 2574 idx=sc->peer_cert_type; 2575#ifndef OPENSSL_NO_ECDH 2576 if (idx == SSL_PKEY_ECC) 2577 { 2578 if (check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509, 2579 s->s3->tmp.new_cipher) == 0) 2580 { /* check failed */ 2581 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT); 2582 goto f_err; 2583 } 2584 else 2585 { 2586 return 1; 2587 } 2588 } 2589#endif 2590 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509); 2591 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey); 2592 EVP_PKEY_free(pkey); 2593 2594 2595 /* Check that we have a certificate if we require one */ 2596 if ((algs & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN)) 2597 { 2598 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT); 2599 goto f_err; 2600 } 2601#ifndef OPENSSL_NO_DSA 2602 else if ((algs & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN)) 2603 { 2604 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT); 2605 goto f_err; 2606 } 2607#endif 2608#ifndef OPENSSL_NO_RSA 2609 if ((algs & SSL_kRSA) && 2610 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL))) 2611 { 2612 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT); 2613 goto f_err; 2614 } 2615#endif 2616#ifndef OPENSSL_NO_DH 2617 if ((algs & SSL_kEDH) && 2618 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL))) 2619 { 2620 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY); 2621 goto f_err; 2622 } 2623 else if ((algs & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA)) 2624 { 2625 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT); 2626 goto f_err; 2627 } 2628#ifndef OPENSSL_NO_DSA 2629 else if ((algs & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA)) 2630 { 2631 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT); 2632 goto f_err; 2633 } 2634#endif 2635#endif 2636 2637 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP)) 2638 { 2639#ifndef OPENSSL_NO_RSA 2640 if (algs & SSL_kRSA) 2641 { 2642 if (rsa == NULL 2643 || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) 2644 { 2645 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY); 2646 goto f_err; 2647 } 2648 } 2649 else 2650#endif 2651#ifndef OPENSSL_NO_DH 2652 if (algs & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) 2653 { 2654 if (dh == NULL 2655 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) 2656 { 2657 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY); 2658 goto f_err; 2659 } 2660 } 2661 else 2662#endif 2663 { 2664 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE); 2665 goto f_err; 2666 } 2667 } 2668 return(1); 2669f_err: 2670 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); 2671err: 2672 return(0); 2673 } 2674 2675 2676#ifndef OPENSSL_NO_ECDH 2677/* This is the complement of nid2curve_id in s3_srvr.c. */ 2678static int curve_id2nid(int curve_id) 2679{ 2680 /* ECC curves from draft-ietf-tls-ecc-01.txt (Mar 15, 2001) 2681 * (no changes in draft-ietf-tls-ecc-03.txt [June 2003]) */ 2682 static int nid_list[26] = 2683 { 2684 0, 2685 NID_sect163k1, /* sect163k1 (1) */ 2686 NID_sect163r1, /* sect163r1 (2) */ 2687 NID_sect163r2, /* sect163r2 (3) */ 2688 NID_sect193r1, /* sect193r1 (4) */ 2689 NID_sect193r2, /* sect193r2 (5) */ 2690 NID_sect233k1, /* sect233k1 (6) */ 2691 NID_sect233r1, /* sect233r1 (7) */ 2692 NID_sect239k1, /* sect239k1 (8) */ 2693 NID_sect283k1, /* sect283k1 (9) */ 2694 NID_sect283r1, /* sect283r1 (10) */ 2695 NID_sect409k1, /* sect409k1 (11) */ 2696 NID_sect409r1, /* sect409r1 (12) */ 2697 NID_sect571k1, /* sect571k1 (13) */ 2698 NID_sect571r1, /* sect571r1 (14) */ 2699 NID_secp160k1, /* secp160k1 (15) */ 2700 NID_secp160r1, /* secp160r1 (16) */ 2701 NID_secp160r2, /* secp160r2 (17) */ 2702 NID_secp192k1, /* secp192k1 (18) */ 2703 NID_X9_62_prime192v1, /* secp192r1 (19) */ 2704 NID_secp224k1, /* secp224k1 (20) */ 2705 NID_secp224r1, /* secp224r1 (21) */ 2706 NID_secp256k1, /* secp256k1 (22) */ 2707 NID_X9_62_prime256v1, /* secp256r1 (23) */ 2708 NID_secp384r1, /* secp384r1 (24) */ 2709 NID_secp521r1 /* secp521r1 (25) */ 2710 }; 2711 2712 if ((curve_id < 1) || (curve_id > 25)) return 0; 2713 2714 return nid_list[curve_id]; 2715} 2716#endif 2717 2718/* Check to see if handshake is full or resumed. Usually this is just a 2719 * case of checking to see if a cache hit has occurred. In the case of 2720 * session tickets we have to check the next message to be sure. 2721 */ 2722 2723#ifndef OPENSSL_NO_TLSEXT 2724int ssl3_check_finished(SSL *s) 2725 { 2726 int ok; 2727 long n; 2728 /* If we have no ticket or session ID is non-zero length (a match of 2729 * a non-zero session length would never reach here) it cannot be a 2730 * resumed session. 2731 */ 2732 if (!s->session->tlsext_tick || s->session->session_id_length) 2733 return 1; 2734 /* this function is called when we really expect a Certificate 2735 * message, so permit appropriate message length */ 2736 n=s->method->ssl_get_message(s, 2737 SSL3_ST_CR_CERT_A, 2738 SSL3_ST_CR_CERT_B, 2739 -1, 2740 s->max_cert_list, 2741 &ok); 2742 if (!ok) return((int)n); 2743 s->s3->tmp.reuse_message = 1; 2744 if ((s->s3->tmp.message_type == SSL3_MT_FINISHED) 2745 || (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET)) 2746 return 2; 2747 2748 return 1; 2749 } 2750#endif 2751 2752int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey) 2753 { 2754 int i = 0; 2755#ifndef OPENSSL_NO_ENGINE 2756 if (s->ctx->client_cert_engine) 2757 { 2758 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s, 2759 SSL_get_client_CA_list(s), 2760 px509, ppkey, NULL, NULL, NULL); 2761 if (i != 0) 2762 return i; 2763 } 2764#endif 2765 if (s->ctx->client_cert_cb) 2766 i = s->ctx->client_cert_cb(s,px509,ppkey); 2767 return i; 2768 } 2769