s3_clnt.c revision 215697
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 if (!(s->options & 818 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG)) 819 { 820 al=SSL_AD_ILLEGAL_PARAMETER; 821 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); 822 goto f_err; 823 } 824 } 825 s->s3->tmp.new_cipher=c; 826 827 /* lets get the compression algorithm */ 828 /* COMPRESSION */ 829#ifdef OPENSSL_NO_COMP 830 if (*(p++) != 0) 831 { 832 al=SSL_AD_ILLEGAL_PARAMETER; 833 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); 834 goto f_err; 835 } 836#else 837 j= *(p++); 838 if (j == 0) 839 comp=NULL; 840 else 841 comp=ssl3_comp_find(s->ctx->comp_methods,j); 842 843 if ((j != 0) && (comp == NULL)) 844 { 845 al=SSL_AD_ILLEGAL_PARAMETER; 846 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); 847 goto f_err; 848 } 849 else 850 { 851 s->s3->tmp.new_compression=comp; 852 } 853#endif 854#ifndef OPENSSL_NO_TLSEXT 855 /* TLS extensions*/ 856 if (s->version >= SSL3_VERSION) 857 { 858 if (!ssl_parse_serverhello_tlsext(s,&p,d,n, &al)) 859 { 860 /* 'al' set by ssl_parse_serverhello_tlsext */ 861 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT); 862 goto f_err; 863 } 864 if (ssl_check_serverhello_tlsext(s) <= 0) 865 { 866 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SERVERHELLO_TLSEXT); 867 goto err; 868 } 869 } 870#endif 871 872 873 if (p != (d+n)) 874 { 875 /* wrong packet length */ 876 al=SSL_AD_DECODE_ERROR; 877 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH); 878 goto err; 879 } 880 881 return(1); 882f_err: 883 ssl3_send_alert(s,SSL3_AL_FATAL,al); 884err: 885 return(-1); 886 } 887 888int ssl3_get_server_certificate(SSL *s) 889 { 890 int al,i,ok,ret= -1; 891 unsigned long n,nc,llen,l; 892 X509 *x=NULL; 893 const unsigned char *q,*p; 894 unsigned char *d; 895 STACK_OF(X509) *sk=NULL; 896 SESS_CERT *sc; 897 EVP_PKEY *pkey=NULL; 898 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */ 899 900 n=s->method->ssl_get_message(s, 901 SSL3_ST_CR_CERT_A, 902 SSL3_ST_CR_CERT_B, 903 -1, 904 s->max_cert_list, 905 &ok); 906 907 if (!ok) return((int)n); 908 909 if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) || 910 ((s->s3->tmp.new_cipher->algorithms & SSL_aKRB5) && 911 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE))) 912 { 913 s->s3->tmp.reuse_message=1; 914 return(1); 915 } 916 917 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE) 918 { 919 al=SSL_AD_UNEXPECTED_MESSAGE; 920 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE); 921 goto f_err; 922 } 923 p=d=(unsigned char *)s->init_msg; 924 925 if ((sk=sk_X509_new_null()) == NULL) 926 { 927 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE); 928 goto err; 929 } 930 931 n2l3(p,llen); 932 if (llen+3 != n) 933 { 934 al=SSL_AD_DECODE_ERROR; 935 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH); 936 goto f_err; 937 } 938 for (nc=0; nc<llen; ) 939 { 940 n2l3(p,l); 941 if ((l+nc+3) > llen) 942 { 943 al=SSL_AD_DECODE_ERROR; 944 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); 945 goto f_err; 946 } 947 948 q=p; 949 x=d2i_X509(NULL,&q,l); 950 if (x == NULL) 951 { 952 al=SSL_AD_BAD_CERTIFICATE; 953 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB); 954 goto f_err; 955 } 956 if (q != (p+l)) 957 { 958 al=SSL_AD_DECODE_ERROR; 959 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); 960 goto f_err; 961 } 962 if (!sk_X509_push(sk,x)) 963 { 964 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE); 965 goto err; 966 } 967 x=NULL; 968 nc+=l+3; 969 p=q; 970 } 971 972 i=ssl_verify_cert_chain(s,sk); 973 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0) 974#ifndef OPENSSL_NO_KRB5 975 && (s->s3->tmp.new_cipher->algorithms & (SSL_MKEY_MASK|SSL_AUTH_MASK)) 976 != (SSL_aKRB5|SSL_kKRB5) 977#endif /* OPENSSL_NO_KRB5 */ 978 ) 979 { 980 al=ssl_verify_alarm_type(s->verify_result); 981 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED); 982 goto f_err; 983 } 984 ERR_clear_error(); /* but we keep s->verify_result */ 985 986 sc=ssl_sess_cert_new(); 987 if (sc == NULL) goto err; 988 989 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert); 990 s->session->sess_cert=sc; 991 992 sc->cert_chain=sk; 993 /* Inconsistency alert: cert_chain does include the peer's 994 * certificate, which we don't include in s3_srvr.c */ 995 x=sk_X509_value(sk,0); 996 sk=NULL; 997 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/ 998 999 pkey=X509_get_pubkey(x); 1000 1001 /* VRS: allow null cert if auth == KRB5 */ 1002 need_cert = ((s->s3->tmp.new_cipher->algorithms 1003 & (SSL_MKEY_MASK|SSL_AUTH_MASK)) 1004 == (SSL_aKRB5|SSL_kKRB5))? 0: 1; 1005 1006#ifdef KSSL_DEBUG 1007 printf("pkey,x = %p, %p\n", (void *)pkey,(void *)x); 1008 printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey)); 1009 printf("cipher, alg, nc = %s, %lx, %d\n", s->s3->tmp.new_cipher->name, 1010 s->s3->tmp.new_cipher->algorithms, need_cert); 1011#endif /* KSSL_DEBUG */ 1012 1013 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey))) 1014 { 1015 x=NULL; 1016 al=SSL3_AL_FATAL; 1017 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 1018 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); 1019 goto f_err; 1020 } 1021 1022 i=ssl_cert_type(x,pkey); 1023 if (need_cert && i < 0) 1024 { 1025 x=NULL; 1026 al=SSL3_AL_FATAL; 1027 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 1028 SSL_R_UNKNOWN_CERTIFICATE_TYPE); 1029 goto f_err; 1030 } 1031 1032 if (need_cert) 1033 { 1034 sc->peer_cert_type=i; 1035 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509); 1036 /* Why would the following ever happen? 1037 * We just created sc a couple of lines ago. */ 1038 if (sc->peer_pkeys[i].x509 != NULL) 1039 X509_free(sc->peer_pkeys[i].x509); 1040 sc->peer_pkeys[i].x509=x; 1041 sc->peer_key= &(sc->peer_pkeys[i]); 1042 1043 if (s->session->peer != NULL) 1044 X509_free(s->session->peer); 1045 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509); 1046 s->session->peer=x; 1047 } 1048 else 1049 { 1050 sc->peer_cert_type=i; 1051 sc->peer_key= NULL; 1052 1053 if (s->session->peer != NULL) 1054 X509_free(s->session->peer); 1055 s->session->peer=NULL; 1056 } 1057 s->session->verify_result = s->verify_result; 1058 1059 x=NULL; 1060 ret=1; 1061 1062 if (0) 1063 { 1064f_err: 1065 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1066 } 1067err: 1068 EVP_PKEY_free(pkey); 1069 X509_free(x); 1070 sk_X509_pop_free(sk,X509_free); 1071 return(ret); 1072 } 1073 1074int ssl3_get_key_exchange(SSL *s) 1075 { 1076#ifndef OPENSSL_NO_RSA 1077 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2]; 1078#endif 1079 EVP_MD_CTX md_ctx; 1080 unsigned char *param,*p; 1081 int al,i,j,param_len,ok; 1082 long n,alg; 1083 EVP_PKEY *pkey=NULL; 1084#ifndef OPENSSL_NO_RSA 1085 RSA *rsa=NULL; 1086#endif 1087#ifndef OPENSSL_NO_DH 1088 DH *dh=NULL; 1089#endif 1090#ifndef OPENSSL_NO_ECDH 1091 EC_KEY *ecdh = NULL; 1092 BN_CTX *bn_ctx = NULL; 1093 EC_POINT *srvr_ecpoint = NULL; 1094 int curve_nid = 0; 1095 int encoded_pt_len = 0; 1096#endif 1097 1098 /* use same message size as in ssl3_get_certificate_request() 1099 * as ServerKeyExchange message may be skipped */ 1100 n=s->method->ssl_get_message(s, 1101 SSL3_ST_CR_KEY_EXCH_A, 1102 SSL3_ST_CR_KEY_EXCH_B, 1103 -1, 1104 s->max_cert_list, 1105 &ok); 1106 1107 if (!ok) return((int)n); 1108 1109 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE) 1110 { 1111 s->s3->tmp.reuse_message=1; 1112 return(1); 1113 } 1114 1115 param=p=(unsigned char *)s->init_msg; 1116 1117 if (s->session->sess_cert != NULL) 1118 { 1119#ifndef OPENSSL_NO_RSA 1120 if (s->session->sess_cert->peer_rsa_tmp != NULL) 1121 { 1122 RSA_free(s->session->sess_cert->peer_rsa_tmp); 1123 s->session->sess_cert->peer_rsa_tmp=NULL; 1124 } 1125#endif 1126#ifndef OPENSSL_NO_DH 1127 if (s->session->sess_cert->peer_dh_tmp) 1128 { 1129 DH_free(s->session->sess_cert->peer_dh_tmp); 1130 s->session->sess_cert->peer_dh_tmp=NULL; 1131 } 1132#endif 1133#ifndef OPENSSL_NO_ECDH 1134 if (s->session->sess_cert->peer_ecdh_tmp) 1135 { 1136 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp); 1137 s->session->sess_cert->peer_ecdh_tmp=NULL; 1138 } 1139#endif 1140 } 1141 else 1142 { 1143 s->session->sess_cert=ssl_sess_cert_new(); 1144 } 1145 1146 param_len=0; 1147 alg=s->s3->tmp.new_cipher->algorithms; 1148 EVP_MD_CTX_init(&md_ctx); 1149 1150#ifndef OPENSSL_NO_RSA 1151 if (alg & SSL_kRSA) 1152 { 1153 if ((rsa=RSA_new()) == NULL) 1154 { 1155 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1156 goto err; 1157 } 1158 n2s(p,i); 1159 param_len=i+2; 1160 if (param_len > n) 1161 { 1162 al=SSL_AD_DECODE_ERROR; 1163 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH); 1164 goto f_err; 1165 } 1166 if (!(rsa->n=BN_bin2bn(p,i,rsa->n))) 1167 { 1168 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1169 goto err; 1170 } 1171 p+=i; 1172 1173 n2s(p,i); 1174 param_len+=i+2; 1175 if (param_len > n) 1176 { 1177 al=SSL_AD_DECODE_ERROR; 1178 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH); 1179 goto f_err; 1180 } 1181 if (!(rsa->e=BN_bin2bn(p,i,rsa->e))) 1182 { 1183 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1184 goto err; 1185 } 1186 p+=i; 1187 n-=param_len; 1188 1189 /* this should be because we are using an export cipher */ 1190 if (alg & SSL_aRSA) 1191 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1192 else 1193 { 1194 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1195 goto err; 1196 } 1197 s->session->sess_cert->peer_rsa_tmp=rsa; 1198 rsa=NULL; 1199 } 1200#else /* OPENSSL_NO_RSA */ 1201 if (0) 1202 ; 1203#endif 1204#ifndef OPENSSL_NO_DH 1205 else if (alg & SSL_kEDH) 1206 { 1207 if ((dh=DH_new()) == NULL) 1208 { 1209 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB); 1210 goto err; 1211 } 1212 n2s(p,i); 1213 param_len=i+2; 1214 if (param_len > n) 1215 { 1216 al=SSL_AD_DECODE_ERROR; 1217 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH); 1218 goto f_err; 1219 } 1220 if (!(dh->p=BN_bin2bn(p,i,NULL))) 1221 { 1222 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1223 goto err; 1224 } 1225 p+=i; 1226 1227 n2s(p,i); 1228 param_len+=i+2; 1229 if (param_len > n) 1230 { 1231 al=SSL_AD_DECODE_ERROR; 1232 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH); 1233 goto f_err; 1234 } 1235 if (!(dh->g=BN_bin2bn(p,i,NULL))) 1236 { 1237 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1238 goto err; 1239 } 1240 p+=i; 1241 1242 n2s(p,i); 1243 param_len+=i+2; 1244 if (param_len > n) 1245 { 1246 al=SSL_AD_DECODE_ERROR; 1247 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH); 1248 goto f_err; 1249 } 1250 if (!(dh->pub_key=BN_bin2bn(p,i,NULL))) 1251 { 1252 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1253 goto err; 1254 } 1255 p+=i; 1256 n-=param_len; 1257 1258#ifndef OPENSSL_NO_RSA 1259 if (alg & SSL_aRSA) 1260 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1261#else 1262 if (0) 1263 ; 1264#endif 1265#ifndef OPENSSL_NO_DSA 1266 else if (alg & SSL_aDSS) 1267 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509); 1268#endif 1269 /* else anonymous DH, so no certificate or pkey. */ 1270 1271 s->session->sess_cert->peer_dh_tmp=dh; 1272 dh=NULL; 1273 } 1274 else if ((alg & SSL_kDHr) || (alg & SSL_kDHd)) 1275 { 1276 al=SSL_AD_ILLEGAL_PARAMETER; 1277 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER); 1278 goto f_err; 1279 } 1280#endif /* !OPENSSL_NO_DH */ 1281 1282#ifndef OPENSSL_NO_ECDH 1283 else if (alg & SSL_kECDHE) 1284 { 1285 EC_GROUP *ngroup; 1286 const EC_GROUP *group; 1287 1288 if ((ecdh=EC_KEY_new()) == NULL) 1289 { 1290 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1291 goto err; 1292 } 1293 1294 /* Extract elliptic curve parameters and the 1295 * server's ephemeral ECDH public key. 1296 * Keep accumulating lengths of various components in 1297 * param_len and make sure it never exceeds n. 1298 */ 1299 1300 /* XXX: For now we only support named (not generic) curves 1301 * and the ECParameters in this case is just three bytes. 1302 */ 1303 param_len=3; 1304 if ((param_len > n) || 1305 (*p != NAMED_CURVE_TYPE) || 1306 ((curve_nid = curve_id2nid(*(p + 2))) == 0)) 1307 { 1308 al=SSL_AD_INTERNAL_ERROR; 1309 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); 1310 goto f_err; 1311 } 1312 1313 ngroup = EC_GROUP_new_by_curve_name(curve_nid); 1314 if (ngroup == NULL) 1315 { 1316 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB); 1317 goto err; 1318 } 1319 if (EC_KEY_set_group(ecdh, ngroup) == 0) 1320 { 1321 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB); 1322 goto err; 1323 } 1324 EC_GROUP_free(ngroup); 1325 1326 group = EC_KEY_get0_group(ecdh); 1327 1328 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && 1329 (EC_GROUP_get_degree(group) > 163)) 1330 { 1331 al=SSL_AD_EXPORT_RESTRICTION; 1332 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER); 1333 goto f_err; 1334 } 1335 1336 p+=3; 1337 1338 /* Next, get the encoded ECPoint */ 1339 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) || 1340 ((bn_ctx = BN_CTX_new()) == NULL)) 1341 { 1342 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1343 goto err; 1344 } 1345 1346 encoded_pt_len = *p; /* length of encoded point */ 1347 p+=1; 1348 param_len += (1 + encoded_pt_len); 1349 if ((param_len > n) || 1350 (EC_POINT_oct2point(group, srvr_ecpoint, 1351 p, encoded_pt_len, bn_ctx) == 0)) 1352 { 1353 al=SSL_AD_DECODE_ERROR; 1354 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT); 1355 goto f_err; 1356 } 1357 1358 n-=param_len; 1359 p+=encoded_pt_len; 1360 1361 /* The ECC/TLS specification does not mention 1362 * the use of DSA to sign ECParameters in the server 1363 * key exchange message. We do support RSA and ECDSA. 1364 */ 1365 if (0) ; 1366#ifndef OPENSSL_NO_RSA 1367 else if (alg & SSL_aRSA) 1368 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1369#endif 1370#ifndef OPENSSL_NO_ECDSA 1371 else if (alg & SSL_aECDSA) 1372 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509); 1373#endif 1374 /* else anonymous ECDH, so no certificate or pkey. */ 1375 EC_KEY_set_public_key(ecdh, srvr_ecpoint); 1376 s->session->sess_cert->peer_ecdh_tmp=ecdh; 1377 ecdh=NULL; 1378 BN_CTX_free(bn_ctx); 1379 bn_ctx = NULL; 1380 EC_POINT_free(srvr_ecpoint); 1381 srvr_ecpoint = NULL; 1382 } 1383 else if (alg & SSL_kECDH) 1384 { 1385 al=SSL_AD_UNEXPECTED_MESSAGE; 1386 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE); 1387 goto f_err; 1388 } 1389#endif /* !OPENSSL_NO_ECDH */ 1390 if (alg & SSL_aFZA) 1391 { 1392 al=SSL_AD_HANDSHAKE_FAILURE; 1393 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER); 1394 goto f_err; 1395 } 1396 1397 1398 /* p points to the next byte, there are 'n' bytes left */ 1399 1400 /* if it was signed, check the signature */ 1401 if (pkey != NULL) 1402 { 1403 n2s(p,i); 1404 n-=2; 1405 j=EVP_PKEY_size(pkey); 1406 1407 if ((i != n) || (n > j) || (n <= 0)) 1408 { 1409 /* wrong packet length */ 1410 al=SSL_AD_DECODE_ERROR; 1411 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH); 1412 goto f_err; 1413 } 1414 1415#ifndef OPENSSL_NO_RSA 1416 if (pkey->type == EVP_PKEY_RSA) 1417 { 1418 int num; 1419 1420 j=0; 1421 q=md_buf; 1422 for (num=2; num > 0; num--) 1423 { 1424 EVP_MD_CTX_set_flags(&md_ctx, 1425 EVP_MD_CTX_FLAG_NON_FIPS_ALLOW); 1426 EVP_DigestInit_ex(&md_ctx,(num == 2) 1427 ?s->ctx->md5:s->ctx->sha1, NULL); 1428 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); 1429 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); 1430 EVP_DigestUpdate(&md_ctx,param,param_len); 1431 EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i); 1432 q+=i; 1433 j+=i; 1434 } 1435 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n, 1436 pkey->pkey.rsa); 1437 if (i < 0) 1438 { 1439 al=SSL_AD_DECRYPT_ERROR; 1440 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT); 1441 goto f_err; 1442 } 1443 if (i == 0) 1444 { 1445 /* bad signature */ 1446 al=SSL_AD_DECRYPT_ERROR; 1447 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE); 1448 goto f_err; 1449 } 1450 } 1451 else 1452#endif 1453#ifndef OPENSSL_NO_DSA 1454 if (pkey->type == EVP_PKEY_DSA) 1455 { 1456 /* lets do DSS */ 1457 EVP_VerifyInit_ex(&md_ctx,EVP_dss1(), NULL); 1458 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); 1459 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); 1460 EVP_VerifyUpdate(&md_ctx,param,param_len); 1461 if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0) 1462 { 1463 /* bad signature */ 1464 al=SSL_AD_DECRYPT_ERROR; 1465 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE); 1466 goto f_err; 1467 } 1468 } 1469 else 1470#endif 1471#ifndef OPENSSL_NO_ECDSA 1472 if (pkey->type == EVP_PKEY_EC) 1473 { 1474 /* let's do ECDSA */ 1475 EVP_VerifyInit_ex(&md_ctx,EVP_ecdsa(), NULL); 1476 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); 1477 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); 1478 EVP_VerifyUpdate(&md_ctx,param,param_len); 1479 if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0) 1480 { 1481 /* bad signature */ 1482 al=SSL_AD_DECRYPT_ERROR; 1483 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE); 1484 goto f_err; 1485 } 1486 } 1487 else 1488#endif 1489 { 1490 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1491 goto err; 1492 } 1493 } 1494 else 1495 { 1496 /* still data left over */ 1497 if (!(alg & SSL_aNULL)) 1498 { 1499 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1500 goto err; 1501 } 1502 if (n != 0) 1503 { 1504 al=SSL_AD_DECODE_ERROR; 1505 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE); 1506 goto f_err; 1507 } 1508 } 1509 EVP_PKEY_free(pkey); 1510 EVP_MD_CTX_cleanup(&md_ctx); 1511 return(1); 1512f_err: 1513 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1514err: 1515 EVP_PKEY_free(pkey); 1516#ifndef OPENSSL_NO_RSA 1517 if (rsa != NULL) 1518 RSA_free(rsa); 1519#endif 1520#ifndef OPENSSL_NO_DH 1521 if (dh != NULL) 1522 DH_free(dh); 1523#endif 1524#ifndef OPENSSL_NO_ECDH 1525 BN_CTX_free(bn_ctx); 1526 EC_POINT_free(srvr_ecpoint); 1527 if (ecdh != NULL) 1528 EC_KEY_free(ecdh); 1529#endif 1530 EVP_MD_CTX_cleanup(&md_ctx); 1531 return(-1); 1532 } 1533 1534int ssl3_get_certificate_request(SSL *s) 1535 { 1536 int ok,ret=0; 1537 unsigned long n,nc,l; 1538 unsigned int llen,ctype_num,i; 1539 X509_NAME *xn=NULL; 1540 const unsigned char *p,*q; 1541 unsigned char *d; 1542 STACK_OF(X509_NAME) *ca_sk=NULL; 1543 1544 n=s->method->ssl_get_message(s, 1545 SSL3_ST_CR_CERT_REQ_A, 1546 SSL3_ST_CR_CERT_REQ_B, 1547 -1, 1548 s->max_cert_list, 1549 &ok); 1550 1551 if (!ok) return((int)n); 1552 1553 s->s3->tmp.cert_req=0; 1554 1555 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE) 1556 { 1557 s->s3->tmp.reuse_message=1; 1558 return(1); 1559 } 1560 1561 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST) 1562 { 1563 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 1564 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE); 1565 goto err; 1566 } 1567 1568 /* TLS does not like anon-DH with client cert */ 1569 if (s->version > SSL3_VERSION) 1570 { 1571 l=s->s3->tmp.new_cipher->algorithms; 1572 if (l & SSL_aNULL) 1573 { 1574 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 1575 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER); 1576 goto err; 1577 } 1578 } 1579 1580 p=d=(unsigned char *)s->init_msg; 1581 1582 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL) 1583 { 1584 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE); 1585 goto err; 1586 } 1587 1588 /* get the certificate types */ 1589 ctype_num= *(p++); 1590 if (ctype_num > SSL3_CT_NUMBER) 1591 ctype_num=SSL3_CT_NUMBER; 1592 for (i=0; i<ctype_num; i++) 1593 s->s3->tmp.ctype[i]= p[i]; 1594 p+=ctype_num; 1595 1596 /* get the CA RDNs */ 1597 n2s(p,llen); 1598#if 0 1599{ 1600FILE *out; 1601out=fopen("/tmp/vsign.der","w"); 1602fwrite(p,1,llen,out); 1603fclose(out); 1604} 1605#endif 1606 1607 if ((llen+ctype_num+2+1) != n) 1608 { 1609 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1610 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH); 1611 goto err; 1612 } 1613 1614 for (nc=0; nc<llen; ) 1615 { 1616 n2s(p,l); 1617 if ((l+nc+2) > llen) 1618 { 1619 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG)) 1620 goto cont; /* netscape bugs */ 1621 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1622 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG); 1623 goto err; 1624 } 1625 1626 q=p; 1627 1628 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL) 1629 { 1630 /* If netscape tolerance is on, ignore errors */ 1631 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG) 1632 goto cont; 1633 else 1634 { 1635 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1636 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB); 1637 goto err; 1638 } 1639 } 1640 1641 if (q != (p+l)) 1642 { 1643 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1644 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH); 1645 goto err; 1646 } 1647 if (!sk_X509_NAME_push(ca_sk,xn)) 1648 { 1649 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE); 1650 goto err; 1651 } 1652 1653 p+=l; 1654 nc+=l+2; 1655 } 1656 1657 if (0) 1658 { 1659cont: 1660 ERR_clear_error(); 1661 } 1662 1663 /* we should setup a certificate to return.... */ 1664 s->s3->tmp.cert_req=1; 1665 s->s3->tmp.ctype_num=ctype_num; 1666 if (s->s3->tmp.ca_names != NULL) 1667 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free); 1668 s->s3->tmp.ca_names=ca_sk; 1669 ca_sk=NULL; 1670 1671 ret=1; 1672err: 1673 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free); 1674 return(ret); 1675 } 1676 1677static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b) 1678 { 1679 return(X509_NAME_cmp(*a,*b)); 1680 } 1681#ifndef OPENSSL_NO_TLSEXT 1682int ssl3_get_new_session_ticket(SSL *s) 1683 { 1684 int ok,al,ret=0, ticklen; 1685 long n; 1686 const unsigned char *p; 1687 unsigned char *d; 1688 1689 n=s->method->ssl_get_message(s, 1690 SSL3_ST_CR_SESSION_TICKET_A, 1691 SSL3_ST_CR_SESSION_TICKET_B, 1692 -1, 1693 16384, 1694 &ok); 1695 1696 if (!ok) 1697 return((int)n); 1698 1699 if (s->s3->tmp.message_type == SSL3_MT_FINISHED) 1700 { 1701 s->s3->tmp.reuse_message=1; 1702 return(1); 1703 } 1704 if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET) 1705 { 1706 al=SSL_AD_UNEXPECTED_MESSAGE; 1707 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_BAD_MESSAGE_TYPE); 1708 goto f_err; 1709 } 1710 if (n < 6) 1711 { 1712 /* need at least ticket_lifetime_hint + ticket length */ 1713 al = SSL3_AL_FATAL,SSL_AD_DECODE_ERROR; 1714 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH); 1715 goto f_err; 1716 } 1717 1718 p=d=(unsigned char *)s->init_msg; 1719 n2l(p, s->session->tlsext_tick_lifetime_hint); 1720 n2s(p, ticklen); 1721 /* ticket_lifetime_hint + ticket_length + ticket */ 1722 if (ticklen + 6 != n) 1723 { 1724 al = SSL3_AL_FATAL,SSL_AD_DECODE_ERROR; 1725 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH); 1726 goto f_err; 1727 } 1728 if (s->session->tlsext_tick) 1729 { 1730 OPENSSL_free(s->session->tlsext_tick); 1731 s->session->tlsext_ticklen = 0; 1732 } 1733 s->session->tlsext_tick = OPENSSL_malloc(ticklen); 1734 if (!s->session->tlsext_tick) 1735 { 1736 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE); 1737 goto err; 1738 } 1739 memcpy(s->session->tlsext_tick, p, ticklen); 1740 s->session->tlsext_ticklen = ticklen; 1741 /* There are two ways to detect a resumed ticket sesion. 1742 * One is to set an appropriate session ID and then the server 1743 * must return a match in ServerHello. This allows the normal 1744 * client session ID matching to work and we know much 1745 * earlier that the ticket has been accepted. 1746 * 1747 * The other way is to set zero length session ID when the 1748 * ticket is presented and rely on the handshake to determine 1749 * session resumption. 1750 * 1751 * We choose the former approach because this fits in with 1752 * assumptions elsewhere in OpenSSL. The session ID is set 1753 * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the 1754 * ticket. 1755 */ 1756 EVP_Digest(p, ticklen, 1757 s->session->session_id, &s->session->session_id_length, 1758#ifndef OPENSSL_NO_SHA256 1759 EVP_sha256(), NULL); 1760#else 1761 EVP_sha1(), NULL); 1762#endif 1763 ret=1; 1764 return(ret); 1765f_err: 1766 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1767err: 1768 return(-1); 1769 } 1770 1771int ssl3_get_cert_status(SSL *s) 1772 { 1773 int ok, al; 1774 unsigned long resplen; 1775 long n; 1776 const unsigned char *p; 1777 1778 n=s->method->ssl_get_message(s, 1779 SSL3_ST_CR_CERT_STATUS_A, 1780 SSL3_ST_CR_CERT_STATUS_B, 1781 SSL3_MT_CERTIFICATE_STATUS, 1782 16384, 1783 &ok); 1784 1785 if (!ok) return((int)n); 1786 if (n < 4) 1787 { 1788 /* need at least status type + length */ 1789 al = SSL_AD_DECODE_ERROR; 1790 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH); 1791 goto f_err; 1792 } 1793 p = (unsigned char *)s->init_msg; 1794 if (*p++ != TLSEXT_STATUSTYPE_ocsp) 1795 { 1796 al = SSL_AD_DECODE_ERROR; 1797 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_UNSUPPORTED_STATUS_TYPE); 1798 goto f_err; 1799 } 1800 n2l3(p, resplen); 1801 if (resplen + 4 != (unsigned long)n) 1802 { 1803 al = SSL_AD_DECODE_ERROR; 1804 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH); 1805 goto f_err; 1806 } 1807 if (s->tlsext_ocsp_resp) 1808 OPENSSL_free(s->tlsext_ocsp_resp); 1809 s->tlsext_ocsp_resp = BUF_memdup(p, resplen); 1810 if (!s->tlsext_ocsp_resp) 1811 { 1812 al = SSL_AD_INTERNAL_ERROR; 1813 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE); 1814 goto f_err; 1815 } 1816 s->tlsext_ocsp_resplen = resplen; 1817 if (s->ctx->tlsext_status_cb) 1818 { 1819 int ret; 1820 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg); 1821 if (ret == 0) 1822 { 1823 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE; 1824 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_INVALID_STATUS_RESPONSE); 1825 goto f_err; 1826 } 1827 if (ret < 0) 1828 { 1829 al = SSL_AD_INTERNAL_ERROR; 1830 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE); 1831 goto f_err; 1832 } 1833 } 1834 return 1; 1835f_err: 1836 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1837 return(-1); 1838 } 1839#endif 1840 1841int ssl3_get_server_done(SSL *s) 1842 { 1843 int ok,ret=0; 1844 long n; 1845 1846 n=s->method->ssl_get_message(s, 1847 SSL3_ST_CR_SRVR_DONE_A, 1848 SSL3_ST_CR_SRVR_DONE_B, 1849 SSL3_MT_SERVER_DONE, 1850 30, /* should be very small, like 0 :-) */ 1851 &ok); 1852 1853 if (!ok) return((int)n); 1854 if (n > 0) 1855 { 1856 /* should contain no data */ 1857 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1858 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH); 1859 return -1; 1860 } 1861 ret=1; 1862 return(ret); 1863 } 1864 1865 1866int ssl3_send_client_key_exchange(SSL *s) 1867 { 1868 unsigned char *p,*d; 1869 int n; 1870 unsigned long l; 1871#ifndef OPENSSL_NO_RSA 1872 unsigned char *q; 1873 EVP_PKEY *pkey=NULL; 1874#endif 1875#ifndef OPENSSL_NO_KRB5 1876 KSSL_ERR kssl_err; 1877#endif /* OPENSSL_NO_KRB5 */ 1878#ifndef OPENSSL_NO_ECDH 1879 EC_KEY *clnt_ecdh = NULL; 1880 const EC_POINT *srvr_ecpoint = NULL; 1881 EVP_PKEY *srvr_pub_pkey = NULL; 1882 unsigned char *encodedPoint = NULL; 1883 int encoded_pt_len = 0; 1884 BN_CTX * bn_ctx = NULL; 1885#endif 1886 1887 if (s->state == SSL3_ST_CW_KEY_EXCH_A) 1888 { 1889 d=(unsigned char *)s->init_buf->data; 1890 p= &(d[4]); 1891 1892 l=s->s3->tmp.new_cipher->algorithms; 1893 1894 /* Fool emacs indentation */ 1895 if (0) {} 1896#ifndef OPENSSL_NO_RSA 1897 else if (l & SSL_kRSA) 1898 { 1899 RSA *rsa; 1900 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; 1901 1902 if (s->session->sess_cert->peer_rsa_tmp != NULL) 1903 rsa=s->session->sess_cert->peer_rsa_tmp; 1904 else 1905 { 1906 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1907 if ((pkey == NULL) || 1908 (pkey->type != EVP_PKEY_RSA) || 1909 (pkey->pkey.rsa == NULL)) 1910 { 1911 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1912 goto err; 1913 } 1914 rsa=pkey->pkey.rsa; 1915 EVP_PKEY_free(pkey); 1916 } 1917 1918 tmp_buf[0]=s->client_version>>8; 1919 tmp_buf[1]=s->client_version&0xff; 1920 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0) 1921 goto err; 1922 1923 s->session->master_key_length=sizeof tmp_buf; 1924 1925 q=p; 1926 /* Fix buf for TLS and beyond */ 1927 if (s->version > SSL3_VERSION) 1928 p+=2; 1929 n=RSA_public_encrypt(sizeof tmp_buf, 1930 tmp_buf,p,rsa,RSA_PKCS1_PADDING); 1931#ifdef PKCS1_CHECK 1932 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++; 1933 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70; 1934#endif 1935 if (n <= 0) 1936 { 1937 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT); 1938 goto err; 1939 } 1940 1941 /* Fix buf for TLS and beyond */ 1942 if (s->version > SSL3_VERSION) 1943 { 1944 s2n(n,q); 1945 n+=2; 1946 } 1947 1948 s->session->master_key_length= 1949 s->method->ssl3_enc->generate_master_secret(s, 1950 s->session->master_key, 1951 tmp_buf,sizeof tmp_buf); 1952 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf); 1953 } 1954#endif 1955#ifndef OPENSSL_NO_KRB5 1956 else if (l & SSL_kKRB5) 1957 { 1958 krb5_error_code krb5rc; 1959 KSSL_CTX *kssl_ctx = s->kssl_ctx; 1960 /* krb5_data krb5_ap_req; */ 1961 krb5_data *enc_ticket; 1962 krb5_data authenticator, *authp = NULL; 1963 EVP_CIPHER_CTX ciph_ctx; 1964 EVP_CIPHER *enc = NULL; 1965 unsigned char iv[EVP_MAX_IV_LENGTH]; 1966 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; 1967 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH 1968 + EVP_MAX_IV_LENGTH]; 1969 int padl, outl = sizeof(epms); 1970 1971 EVP_CIPHER_CTX_init(&ciph_ctx); 1972 1973#ifdef KSSL_DEBUG 1974 printf("ssl3_send_client_key_exchange(%lx & %lx)\n", 1975 l, SSL_kKRB5); 1976#endif /* KSSL_DEBUG */ 1977 1978 authp = NULL; 1979#ifdef KRB5SENDAUTH 1980 if (KRB5SENDAUTH) authp = &authenticator; 1981#endif /* KRB5SENDAUTH */ 1982 1983 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp, 1984 &kssl_err); 1985 enc = kssl_map_enc(kssl_ctx->enctype); 1986 if (enc == NULL) 1987 goto err; 1988#ifdef KSSL_DEBUG 1989 { 1990 printf("kssl_cget_tkt rtn %d\n", krb5rc); 1991 if (krb5rc && kssl_err.text) 1992 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text); 1993 } 1994#endif /* KSSL_DEBUG */ 1995 1996 if (krb5rc) 1997 { 1998 ssl3_send_alert(s,SSL3_AL_FATAL, 1999 SSL_AD_HANDSHAKE_FAILURE); 2000 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2001 kssl_err.reason); 2002 goto err; 2003 } 2004 2005 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ 2006 ** in place of RFC 2712 KerberosWrapper, as in: 2007 ** 2008 ** Send ticket (copy to *p, set n = length) 2009 ** n = krb5_ap_req.length; 2010 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length); 2011 ** if (krb5_ap_req.data) 2012 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req); 2013 ** 2014 ** Now using real RFC 2712 KerberosWrapper 2015 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>) 2016 ** Note: 2712 "opaque" types are here replaced 2017 ** with a 2-byte length followed by the value. 2018 ** Example: 2019 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms 2020 ** Where "xx xx" = length bytes. Shown here with 2021 ** optional authenticator omitted. 2022 */ 2023 2024 /* KerberosWrapper.Ticket */ 2025 s2n(enc_ticket->length,p); 2026 memcpy(p, enc_ticket->data, enc_ticket->length); 2027 p+= enc_ticket->length; 2028 n = enc_ticket->length + 2; 2029 2030 /* KerberosWrapper.Authenticator */ 2031 if (authp && authp->length) 2032 { 2033 s2n(authp->length,p); 2034 memcpy(p, authp->data, authp->length); 2035 p+= authp->length; 2036 n+= authp->length + 2; 2037 2038 free(authp->data); 2039 authp->data = NULL; 2040 authp->length = 0; 2041 } 2042 else 2043 { 2044 s2n(0,p);/* null authenticator length */ 2045 n+=2; 2046 } 2047 2048 tmp_buf[0]=s->client_version>>8; 2049 tmp_buf[1]=s->client_version&0xff; 2050 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0) 2051 goto err; 2052 2053 /* 20010420 VRS. Tried it this way; failed. 2054 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL); 2055 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx, 2056 ** kssl_ctx->length); 2057 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv); 2058 */ 2059 2060 memset(iv, 0, sizeof iv); /* per RFC 1510 */ 2061 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL, 2062 kssl_ctx->key,iv); 2063 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf, 2064 sizeof tmp_buf); 2065 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl); 2066 outl += padl; 2067 if (outl > sizeof epms) 2068 { 2069 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); 2070 goto err; 2071 } 2072 EVP_CIPHER_CTX_cleanup(&ciph_ctx); 2073 2074 /* KerberosWrapper.EncryptedPreMasterSecret */ 2075 s2n(outl,p); 2076 memcpy(p, epms, outl); 2077 p+=outl; 2078 n+=outl + 2; 2079 2080 s->session->master_key_length= 2081 s->method->ssl3_enc->generate_master_secret(s, 2082 s->session->master_key, 2083 tmp_buf, sizeof tmp_buf); 2084 2085 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf); 2086 OPENSSL_cleanse(epms, outl); 2087 } 2088#endif 2089#ifndef OPENSSL_NO_DH 2090 else if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) 2091 { 2092 DH *dh_srvr,*dh_clnt; 2093 2094 if (s->session->sess_cert == NULL) 2095 { 2096 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 2097 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE); 2098 goto err; 2099 } 2100 2101 if (s->session->sess_cert->peer_dh_tmp != NULL) 2102 dh_srvr=s->session->sess_cert->peer_dh_tmp; 2103 else 2104 { 2105 /* we get them from the cert */ 2106 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); 2107 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS); 2108 goto err; 2109 } 2110 2111 /* generate a new random key */ 2112 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL) 2113 { 2114 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 2115 goto err; 2116 } 2117 if (!DH_generate_key(dh_clnt)) 2118 { 2119 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 2120 goto err; 2121 } 2122 2123 /* use the 'p' output buffer for the DH key, but 2124 * make sure to clear it out afterwards */ 2125 2126 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt); 2127 2128 if (n <= 0) 2129 { 2130 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 2131 goto err; 2132 } 2133 2134 /* generate master key from the result */ 2135 s->session->master_key_length= 2136 s->method->ssl3_enc->generate_master_secret(s, 2137 s->session->master_key,p,n); 2138 /* clean up */ 2139 memset(p,0,n); 2140 2141 /* send off the data */ 2142 n=BN_num_bytes(dh_clnt->pub_key); 2143 s2n(n,p); 2144 BN_bn2bin(dh_clnt->pub_key,p); 2145 n+=2; 2146 2147 DH_free(dh_clnt); 2148 2149 /* perhaps clean things up a bit EAY EAY EAY EAY*/ 2150 } 2151#endif 2152 2153#ifndef OPENSSL_NO_ECDH 2154 else if ((l & SSL_kECDH) || (l & SSL_kECDHE)) 2155 { 2156 const EC_GROUP *srvr_group = NULL; 2157 EC_KEY *tkey; 2158 int ecdh_clnt_cert = 0; 2159 int field_size = 0; 2160 2161 /* Did we send out the client's 2162 * ECDH share for use in premaster 2163 * computation as part of client certificate? 2164 * If so, set ecdh_clnt_cert to 1. 2165 */ 2166 if ((l & SSL_kECDH) && (s->cert != NULL)) 2167 { 2168 /* XXX: For now, we do not support client 2169 * authentication using ECDH certificates. 2170 * To add such support, one needs to add 2171 * code that checks for appropriate 2172 * conditions and sets ecdh_clnt_cert to 1. 2173 * For example, the cert have an ECC 2174 * key on the same curve as the server's 2175 * and the key should be authorized for 2176 * key agreement. 2177 * 2178 * One also needs to add code in ssl3_connect 2179 * to skip sending the certificate verify 2180 * message. 2181 * 2182 * if ((s->cert->key->privatekey != NULL) && 2183 * (s->cert->key->privatekey->type == 2184 * EVP_PKEY_EC) && ...) 2185 * ecdh_clnt_cert = 1; 2186 */ 2187 } 2188 2189 if (s->session->sess_cert->peer_ecdh_tmp != NULL) 2190 { 2191 tkey = s->session->sess_cert->peer_ecdh_tmp; 2192 } 2193 else 2194 { 2195 /* Get the Server Public Key from Cert */ 2196 srvr_pub_pkey = X509_get_pubkey(s->session-> \ 2197 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509); 2198 if ((srvr_pub_pkey == NULL) || 2199 (srvr_pub_pkey->type != EVP_PKEY_EC) || 2200 (srvr_pub_pkey->pkey.ec == NULL)) 2201 { 2202 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2203 ERR_R_INTERNAL_ERROR); 2204 goto err; 2205 } 2206 2207 tkey = srvr_pub_pkey->pkey.ec; 2208 } 2209 2210 srvr_group = EC_KEY_get0_group(tkey); 2211 srvr_ecpoint = EC_KEY_get0_public_key(tkey); 2212 2213 if ((srvr_group == NULL) || (srvr_ecpoint == NULL)) 2214 { 2215 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2216 ERR_R_INTERNAL_ERROR); 2217 goto err; 2218 } 2219 2220 if ((clnt_ecdh=EC_KEY_new()) == NULL) 2221 { 2222 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2223 goto err; 2224 } 2225 2226 if (!EC_KEY_set_group(clnt_ecdh, srvr_group)) 2227 { 2228 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB); 2229 goto err; 2230 } 2231 if (ecdh_clnt_cert) 2232 { 2233 /* Reuse key info from our certificate 2234 * We only need our private key to perform 2235 * the ECDH computation. 2236 */ 2237 const BIGNUM *priv_key; 2238 tkey = s->cert->key->privatekey->pkey.ec; 2239 priv_key = EC_KEY_get0_private_key(tkey); 2240 if (priv_key == NULL) 2241 { 2242 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2243 goto err; 2244 } 2245 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key)) 2246 { 2247 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB); 2248 goto err; 2249 } 2250 } 2251 else 2252 { 2253 /* Generate a new ECDH key pair */ 2254 if (!(EC_KEY_generate_key(clnt_ecdh))) 2255 { 2256 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB); 2257 goto err; 2258 } 2259 } 2260 2261 /* use the 'p' output buffer for the ECDH key, but 2262 * make sure to clear it out afterwards 2263 */ 2264 2265 field_size = EC_GROUP_get_degree(srvr_group); 2266 if (field_size <= 0) 2267 { 2268 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2269 ERR_R_ECDH_LIB); 2270 goto err; 2271 } 2272 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL); 2273 if (n <= 0) 2274 { 2275 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2276 ERR_R_ECDH_LIB); 2277 goto err; 2278 } 2279 2280 /* generate master key from the result */ 2281 s->session->master_key_length = s->method->ssl3_enc \ 2282 -> generate_master_secret(s, 2283 s->session->master_key, 2284 p, n); 2285 2286 memset(p, 0, n); /* clean up */ 2287 2288 if (ecdh_clnt_cert) 2289 { 2290 /* Send empty client key exch message */ 2291 n = 0; 2292 } 2293 else 2294 { 2295 /* First check the size of encoding and 2296 * allocate memory accordingly. 2297 */ 2298 encoded_pt_len = 2299 EC_POINT_point2oct(srvr_group, 2300 EC_KEY_get0_public_key(clnt_ecdh), 2301 POINT_CONVERSION_UNCOMPRESSED, 2302 NULL, 0, NULL); 2303 2304 encodedPoint = (unsigned char *) 2305 OPENSSL_malloc(encoded_pt_len * 2306 sizeof(unsigned char)); 2307 bn_ctx = BN_CTX_new(); 2308 if ((encodedPoint == NULL) || 2309 (bn_ctx == NULL)) 2310 { 2311 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2312 goto err; 2313 } 2314 2315 /* Encode the public key */ 2316 n = EC_POINT_point2oct(srvr_group, 2317 EC_KEY_get0_public_key(clnt_ecdh), 2318 POINT_CONVERSION_UNCOMPRESSED, 2319 encodedPoint, encoded_pt_len, bn_ctx); 2320 2321 *p = n; /* length of encoded point */ 2322 /* Encoded point will be copied here */ 2323 p += 1; 2324 /* copy the point */ 2325 memcpy((unsigned char *)p, encodedPoint, n); 2326 /* increment n to account for length field */ 2327 n += 1; 2328 } 2329 2330 /* Free allocated memory */ 2331 BN_CTX_free(bn_ctx); 2332 if (encodedPoint != NULL) OPENSSL_free(encodedPoint); 2333 if (clnt_ecdh != NULL) 2334 EC_KEY_free(clnt_ecdh); 2335 EVP_PKEY_free(srvr_pub_pkey); 2336 } 2337#endif /* !OPENSSL_NO_ECDH */ 2338 else 2339 { 2340 ssl3_send_alert(s, SSL3_AL_FATAL, 2341 SSL_AD_HANDSHAKE_FAILURE); 2342 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2343 ERR_R_INTERNAL_ERROR); 2344 goto err; 2345 } 2346 2347 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE; 2348 l2n3(n,d); 2349 2350 s->state=SSL3_ST_CW_KEY_EXCH_B; 2351 /* number of bytes to write */ 2352 s->init_num=n+4; 2353 s->init_off=0; 2354 } 2355 2356 /* SSL3_ST_CW_KEY_EXCH_B */ 2357 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 2358err: 2359#ifndef OPENSSL_NO_ECDH 2360 BN_CTX_free(bn_ctx); 2361 if (encodedPoint != NULL) OPENSSL_free(encodedPoint); 2362 if (clnt_ecdh != NULL) 2363 EC_KEY_free(clnt_ecdh); 2364 EVP_PKEY_free(srvr_pub_pkey); 2365#endif 2366 return(-1); 2367 } 2368 2369int ssl3_send_client_verify(SSL *s) 2370 { 2371 unsigned char *p,*d; 2372 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH]; 2373 EVP_PKEY *pkey; 2374#ifndef OPENSSL_NO_RSA 2375 unsigned u=0; 2376#endif 2377 unsigned long n; 2378#if !defined(OPENSSL_NO_DSA) || !defined(OPENSSL_NO_ECDSA) 2379 int j; 2380#endif 2381 2382 if (s->state == SSL3_ST_CW_CERT_VRFY_A) 2383 { 2384 d=(unsigned char *)s->init_buf->data; 2385 p= &(d[4]); 2386 pkey=s->cert->key->privatekey; 2387 2388 s->method->ssl3_enc->cert_verify_mac(s,&(s->s3->finish_dgst2), 2389 &(data[MD5_DIGEST_LENGTH])); 2390 2391#ifndef OPENSSL_NO_RSA 2392 if (pkey->type == EVP_PKEY_RSA) 2393 { 2394 s->method->ssl3_enc->cert_verify_mac(s, 2395 &(s->s3->finish_dgst1),&(data[0])); 2396 if (RSA_sign(NID_md5_sha1, data, 2397 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH, 2398 &(p[2]), &u, pkey->pkey.rsa) <= 0 ) 2399 { 2400 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB); 2401 goto err; 2402 } 2403 s2n(u,p); 2404 n=u+2; 2405 } 2406 else 2407#endif 2408#ifndef OPENSSL_NO_DSA 2409 if (pkey->type == EVP_PKEY_DSA) 2410 { 2411 if (!DSA_sign(pkey->save_type, 2412 &(data[MD5_DIGEST_LENGTH]), 2413 SHA_DIGEST_LENGTH,&(p[2]), 2414 (unsigned int *)&j,pkey->pkey.dsa)) 2415 { 2416 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB); 2417 goto err; 2418 } 2419 s2n(j,p); 2420 n=j+2; 2421 } 2422 else 2423#endif 2424#ifndef OPENSSL_NO_ECDSA 2425 if (pkey->type == EVP_PKEY_EC) 2426 { 2427 if (!ECDSA_sign(pkey->save_type, 2428 &(data[MD5_DIGEST_LENGTH]), 2429 SHA_DIGEST_LENGTH,&(p[2]), 2430 (unsigned int *)&j,pkey->pkey.ec)) 2431 { 2432 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, 2433 ERR_R_ECDSA_LIB); 2434 goto err; 2435 } 2436 s2n(j,p); 2437 n=j+2; 2438 } 2439 else 2440#endif 2441 { 2442 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR); 2443 goto err; 2444 } 2445 *(d++)=SSL3_MT_CERTIFICATE_VERIFY; 2446 l2n3(n,d); 2447 2448 s->state=SSL3_ST_CW_CERT_VRFY_B; 2449 s->init_num=(int)n+4; 2450 s->init_off=0; 2451 } 2452 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 2453err: 2454 return(-1); 2455 } 2456 2457int ssl3_send_client_certificate(SSL *s) 2458 { 2459 X509 *x509=NULL; 2460 EVP_PKEY *pkey=NULL; 2461 int i; 2462 unsigned long l; 2463 2464 if (s->state == SSL3_ST_CW_CERT_A) 2465 { 2466 if ((s->cert == NULL) || 2467 (s->cert->key->x509 == NULL) || 2468 (s->cert->key->privatekey == NULL)) 2469 s->state=SSL3_ST_CW_CERT_B; 2470 else 2471 s->state=SSL3_ST_CW_CERT_C; 2472 } 2473 2474 /* We need to get a client cert */ 2475 if (s->state == SSL3_ST_CW_CERT_B) 2476 { 2477 /* If we get an error, we need to 2478 * ssl->rwstate=SSL_X509_LOOKUP; return(-1); 2479 * We then get retied later */ 2480 i=0; 2481 i = ssl_do_client_cert_cb(s, &x509, &pkey); 2482 if (i < 0) 2483 { 2484 s->rwstate=SSL_X509_LOOKUP; 2485 return(-1); 2486 } 2487 s->rwstate=SSL_NOTHING; 2488 if ((i == 1) && (pkey != NULL) && (x509 != NULL)) 2489 { 2490 s->state=SSL3_ST_CW_CERT_B; 2491 if ( !SSL_use_certificate(s,x509) || 2492 !SSL_use_PrivateKey(s,pkey)) 2493 i=0; 2494 } 2495 else if (i == 1) 2496 { 2497 i=0; 2498 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); 2499 } 2500 2501 if (x509 != NULL) X509_free(x509); 2502 if (pkey != NULL) EVP_PKEY_free(pkey); 2503 if (i == 0) 2504 { 2505 if (s->version == SSL3_VERSION) 2506 { 2507 s->s3->tmp.cert_req=0; 2508 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE); 2509 return(1); 2510 } 2511 else 2512 { 2513 s->s3->tmp.cert_req=2; 2514 } 2515 } 2516 2517 /* Ok, we have a cert */ 2518 s->state=SSL3_ST_CW_CERT_C; 2519 } 2520 2521 if (s->state == SSL3_ST_CW_CERT_C) 2522 { 2523 s->state=SSL3_ST_CW_CERT_D; 2524 l=ssl3_output_cert_chain(s, 2525 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509); 2526 s->init_num=(int)l; 2527 s->init_off=0; 2528 } 2529 /* SSL3_ST_CW_CERT_D */ 2530 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 2531 } 2532 2533#define has_bits(i,m) (((i)&(m)) == (m)) 2534 2535int ssl3_check_cert_and_algorithm(SSL *s) 2536 { 2537 int i,idx; 2538 long algs; 2539 EVP_PKEY *pkey=NULL; 2540 SESS_CERT *sc; 2541#ifndef OPENSSL_NO_RSA 2542 RSA *rsa; 2543#endif 2544#ifndef OPENSSL_NO_DH 2545 DH *dh; 2546#endif 2547 2548 sc=s->session->sess_cert; 2549 2550 algs=s->s3->tmp.new_cipher->algorithms; 2551 2552 /* we don't have a certificate */ 2553 if (algs & (SSL_aDH|SSL_aNULL|SSL_aKRB5)) 2554 return(1); 2555 2556 if (sc == NULL) 2557 { 2558 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR); 2559 goto err; 2560 } 2561 2562#ifndef OPENSSL_NO_RSA 2563 rsa=s->session->sess_cert->peer_rsa_tmp; 2564#endif 2565#ifndef OPENSSL_NO_DH 2566 dh=s->session->sess_cert->peer_dh_tmp; 2567#endif 2568 2569 /* This is the passed certificate */ 2570 2571 idx=sc->peer_cert_type; 2572#ifndef OPENSSL_NO_ECDH 2573 if (idx == SSL_PKEY_ECC) 2574 { 2575 if (check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509, 2576 s->s3->tmp.new_cipher) == 0) 2577 { /* check failed */ 2578 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT); 2579 goto f_err; 2580 } 2581 else 2582 { 2583 return 1; 2584 } 2585 } 2586#endif 2587 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509); 2588 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey); 2589 EVP_PKEY_free(pkey); 2590 2591 2592 /* Check that we have a certificate if we require one */ 2593 if ((algs & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN)) 2594 { 2595 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT); 2596 goto f_err; 2597 } 2598#ifndef OPENSSL_NO_DSA 2599 else if ((algs & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN)) 2600 { 2601 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT); 2602 goto f_err; 2603 } 2604#endif 2605#ifndef OPENSSL_NO_RSA 2606 if ((algs & SSL_kRSA) && 2607 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL))) 2608 { 2609 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT); 2610 goto f_err; 2611 } 2612#endif 2613#ifndef OPENSSL_NO_DH 2614 if ((algs & SSL_kEDH) && 2615 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL))) 2616 { 2617 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY); 2618 goto f_err; 2619 } 2620 else if ((algs & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA)) 2621 { 2622 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT); 2623 goto f_err; 2624 } 2625#ifndef OPENSSL_NO_DSA 2626 else if ((algs & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA)) 2627 { 2628 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT); 2629 goto f_err; 2630 } 2631#endif 2632#endif 2633 2634 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP)) 2635 { 2636#ifndef OPENSSL_NO_RSA 2637 if (algs & SSL_kRSA) 2638 { 2639 if (rsa == NULL 2640 || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) 2641 { 2642 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY); 2643 goto f_err; 2644 } 2645 } 2646 else 2647#endif 2648#ifndef OPENSSL_NO_DH 2649 if (algs & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) 2650 { 2651 if (dh == NULL 2652 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) 2653 { 2654 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY); 2655 goto f_err; 2656 } 2657 } 2658 else 2659#endif 2660 { 2661 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE); 2662 goto f_err; 2663 } 2664 } 2665 return(1); 2666f_err: 2667 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); 2668err: 2669 return(0); 2670 } 2671 2672 2673#ifndef OPENSSL_NO_ECDH 2674/* This is the complement of nid2curve_id in s3_srvr.c. */ 2675static int curve_id2nid(int curve_id) 2676{ 2677 /* ECC curves from draft-ietf-tls-ecc-01.txt (Mar 15, 2001) 2678 * (no changes in draft-ietf-tls-ecc-03.txt [June 2003]) */ 2679 static int nid_list[26] = 2680 { 2681 0, 2682 NID_sect163k1, /* sect163k1 (1) */ 2683 NID_sect163r1, /* sect163r1 (2) */ 2684 NID_sect163r2, /* sect163r2 (3) */ 2685 NID_sect193r1, /* sect193r1 (4) */ 2686 NID_sect193r2, /* sect193r2 (5) */ 2687 NID_sect233k1, /* sect233k1 (6) */ 2688 NID_sect233r1, /* sect233r1 (7) */ 2689 NID_sect239k1, /* sect239k1 (8) */ 2690 NID_sect283k1, /* sect283k1 (9) */ 2691 NID_sect283r1, /* sect283r1 (10) */ 2692 NID_sect409k1, /* sect409k1 (11) */ 2693 NID_sect409r1, /* sect409r1 (12) */ 2694 NID_sect571k1, /* sect571k1 (13) */ 2695 NID_sect571r1, /* sect571r1 (14) */ 2696 NID_secp160k1, /* secp160k1 (15) */ 2697 NID_secp160r1, /* secp160r1 (16) */ 2698 NID_secp160r2, /* secp160r2 (17) */ 2699 NID_secp192k1, /* secp192k1 (18) */ 2700 NID_X9_62_prime192v1, /* secp192r1 (19) */ 2701 NID_secp224k1, /* secp224k1 (20) */ 2702 NID_secp224r1, /* secp224r1 (21) */ 2703 NID_secp256k1, /* secp256k1 (22) */ 2704 NID_X9_62_prime256v1, /* secp256r1 (23) */ 2705 NID_secp384r1, /* secp384r1 (24) */ 2706 NID_secp521r1 /* secp521r1 (25) */ 2707 }; 2708 2709 if ((curve_id < 1) || (curve_id > 25)) return 0; 2710 2711 return nid_list[curve_id]; 2712} 2713#endif 2714 2715/* Check to see if handshake is full or resumed. Usually this is just a 2716 * case of checking to see if a cache hit has occurred. In the case of 2717 * session tickets we have to check the next message to be sure. 2718 */ 2719 2720#ifndef OPENSSL_NO_TLSEXT 2721int ssl3_check_finished(SSL *s) 2722 { 2723 int ok; 2724 long n; 2725 /* If we have no ticket or session ID is non-zero length (a match of 2726 * a non-zero session length would never reach here) it cannot be a 2727 * resumed session. 2728 */ 2729 if (!s->session->tlsext_tick || s->session->session_id_length) 2730 return 1; 2731 /* this function is called when we really expect a Certificate 2732 * message, so permit appropriate message length */ 2733 n=s->method->ssl_get_message(s, 2734 SSL3_ST_CR_CERT_A, 2735 SSL3_ST_CR_CERT_B, 2736 -1, 2737 s->max_cert_list, 2738 &ok); 2739 if (!ok) return((int)n); 2740 s->s3->tmp.reuse_message = 1; 2741 if ((s->s3->tmp.message_type == SSL3_MT_FINISHED) 2742 || (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET)) 2743 return 2; 2744 2745 return 1; 2746 } 2747#endif 2748 2749int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey) 2750 { 2751 int i = 0; 2752#ifndef OPENSSL_NO_ENGINE 2753 if (s->ctx->client_cert_engine) 2754 { 2755 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s, 2756 SSL_get_client_CA_list(s), 2757 px509, ppkey, NULL, NULL, NULL); 2758 if (i != 0) 2759 return i; 2760 } 2761#endif 2762 if (s->ctx->client_cert_cb) 2763 i = s->ctx->client_cert_cb(s,px509,ppkey); 2764 return i; 2765 } 2766