s3_clnt.c revision 215288
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),l; 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 l=s->s3->tmp.new_cipher->algorithms; 364 /* EAY EAY EAY need to check for DH fix cert 365 * sent back */ 366 /* For TLS, cert_req is set to 2, so a cert chain 367 * of nothing is sent, but no verify packet is sent */ 368 /* XXX: For now, we do not support client 369 * authentication in ECDH cipher suites with 370 * ECDH (rather than ECDSA) certificates. 371 * We need to skip the certificate verify 372 * message when client's ECDH public key is sent 373 * inside the client certificate. 374 */ 375 if (s->s3->tmp.cert_req == 1) 376 { 377 s->state=SSL3_ST_CW_CERT_VRFY_A; 378 } 379 else 380 { 381 s->state=SSL3_ST_CW_CHANGE_A; 382 s->s3->change_cipher_spec=0; 383 } 384 385 s->init_num=0; 386 break; 387 388 case SSL3_ST_CW_CERT_VRFY_A: 389 case SSL3_ST_CW_CERT_VRFY_B: 390 ret=ssl3_send_client_verify(s); 391 if (ret <= 0) goto end; 392 s->state=SSL3_ST_CW_CHANGE_A; 393 s->init_num=0; 394 s->s3->change_cipher_spec=0; 395 break; 396 397 case SSL3_ST_CW_CHANGE_A: 398 case SSL3_ST_CW_CHANGE_B: 399 ret=ssl3_send_change_cipher_spec(s, 400 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B); 401 if (ret <= 0) goto end; 402 s->state=SSL3_ST_CW_FINISHED_A; 403 s->init_num=0; 404 405 s->session->cipher=s->s3->tmp.new_cipher; 406#ifdef OPENSSL_NO_COMP 407 s->session->compress_meth=0; 408#else 409 if (s->s3->tmp.new_compression == NULL) 410 s->session->compress_meth=0; 411 else 412 s->session->compress_meth= 413 s->s3->tmp.new_compression->id; 414#endif 415 if (!s->method->ssl3_enc->setup_key_block(s)) 416 { 417 ret= -1; 418 goto end; 419 } 420 421 if (!s->method->ssl3_enc->change_cipher_state(s, 422 SSL3_CHANGE_CIPHER_CLIENT_WRITE)) 423 { 424 ret= -1; 425 goto end; 426 } 427 428 break; 429 430 case SSL3_ST_CW_FINISHED_A: 431 case SSL3_ST_CW_FINISHED_B: 432 ret=ssl3_send_finished(s, 433 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B, 434 s->method->ssl3_enc->client_finished_label, 435 s->method->ssl3_enc->client_finished_label_len); 436 if (ret <= 0) goto end; 437 s->state=SSL3_ST_CW_FLUSH; 438 439 /* clear flags */ 440 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER; 441 if (s->hit) 442 { 443 s->s3->tmp.next_state=SSL_ST_OK; 444 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED) 445 { 446 s->state=SSL_ST_OK; 447 s->s3->flags|=SSL3_FLAGS_POP_BUFFER; 448 s->s3->delay_buf_pop_ret=0; 449 } 450 } 451 else 452 { 453#ifndef OPENSSL_NO_TLSEXT 454 /* Allow NewSessionTicket if ticket expected */ 455 if (s->tlsext_ticket_expected) 456 s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A; 457 else 458#endif 459 460 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A; 461 } 462 s->init_num=0; 463 break; 464 465#ifndef OPENSSL_NO_TLSEXT 466 case SSL3_ST_CR_SESSION_TICKET_A: 467 case SSL3_ST_CR_SESSION_TICKET_B: 468 ret=ssl3_get_new_session_ticket(s); 469 if (ret <= 0) goto end; 470 s->state=SSL3_ST_CR_FINISHED_A; 471 s->init_num=0; 472 break; 473 474 case SSL3_ST_CR_CERT_STATUS_A: 475 case SSL3_ST_CR_CERT_STATUS_B: 476 ret=ssl3_get_cert_status(s); 477 if (ret <= 0) goto end; 478 s->state=SSL3_ST_CR_KEY_EXCH_A; 479 s->init_num=0; 480 break; 481#endif 482 483 case SSL3_ST_CR_FINISHED_A: 484 case SSL3_ST_CR_FINISHED_B: 485 486 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A, 487 SSL3_ST_CR_FINISHED_B); 488 if (ret <= 0) goto end; 489 490 if (s->hit) 491 s->state=SSL3_ST_CW_CHANGE_A; 492 else 493 s->state=SSL_ST_OK; 494 s->init_num=0; 495 break; 496 497 case SSL3_ST_CW_FLUSH: 498 s->rwstate=SSL_WRITING; 499 if (BIO_flush(s->wbio) <= 0) 500 { 501 ret= -1; 502 goto end; 503 } 504 s->rwstate=SSL_NOTHING; 505 s->state=s->s3->tmp.next_state; 506 break; 507 508 case SSL_ST_OK: 509 /* clean a few things up */ 510 ssl3_cleanup_key_block(s); 511 512 if (s->init_buf != NULL) 513 { 514 BUF_MEM_free(s->init_buf); 515 s->init_buf=NULL; 516 } 517 518 /* If we are not 'joining' the last two packets, 519 * remove the buffering now */ 520 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER)) 521 ssl_free_wbio_buffer(s); 522 /* else do it later in ssl3_write */ 523 524 s->init_num=0; 525 s->new_session=0; 526 527 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT); 528 if (s->hit) s->ctx->stats.sess_hit++; 529 530 ret=1; 531 /* s->server=0; */ 532 s->handshake_func=ssl3_connect; 533 s->ctx->stats.sess_connect_good++; 534 535 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1); 536 537 goto end; 538 /* break; */ 539 540 default: 541 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE); 542 ret= -1; 543 goto end; 544 /* break; */ 545 } 546 547 /* did we do anything */ 548 if (!s->s3->tmp.reuse_message && !skip) 549 { 550 if (s->debug) 551 { 552 if ((ret=BIO_flush(s->wbio)) <= 0) 553 goto end; 554 } 555 556 if ((cb != NULL) && (s->state != state)) 557 { 558 new_state=s->state; 559 s->state=state; 560 cb(s,SSL_CB_CONNECT_LOOP,1); 561 s->state=new_state; 562 } 563 } 564 skip=0; 565 } 566end: 567 s->in_handshake--; 568 if (buf != NULL) 569 BUF_MEM_free(buf); 570 if (cb != NULL) 571 cb(s,SSL_CB_CONNECT_EXIT,ret); 572 return(ret); 573 } 574 575 576int ssl3_client_hello(SSL *s) 577 { 578 unsigned char *buf; 579 unsigned char *p,*d; 580 int i; 581 unsigned long Time,l; 582#ifndef OPENSSL_NO_COMP 583 int j; 584 SSL_COMP *comp; 585#endif 586 587 buf=(unsigned char *)s->init_buf->data; 588 if (s->state == SSL3_ST_CW_CLNT_HELLO_A) 589 { 590 SSL_SESSION *sess = s->session; 591 if ((sess == NULL) || 592 (sess->ssl_version != s->version) || 593#ifdef OPENSSL_NO_TLSEXT 594 !sess->session_id_length || 595#else 596 (!sess->session_id_length && !sess->tlsext_tick) || 597#endif 598 (sess->not_resumable)) 599 { 600 if (!ssl_get_new_session(s,0)) 601 goto err; 602 } 603 /* else use the pre-loaded session */ 604 605 p=s->s3->client_random; 606 Time=(unsigned long)time(NULL); /* Time */ 607 l2n(Time,p); 608 if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0) 609 goto err; 610 611 /* Do the message type and length last */ 612 d=p= &(buf[4]); 613 614 *(p++)=s->version>>8; 615 *(p++)=s->version&0xff; 616 s->client_version=s->version; 617 618 /* Random stuff */ 619 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE); 620 p+=SSL3_RANDOM_SIZE; 621 622 /* Session ID */ 623 if (s->new_session) 624 i=0; 625 else 626 i=s->session->session_id_length; 627 *(p++)=i; 628 if (i != 0) 629 { 630 if (i > (int)sizeof(s->session->session_id)) 631 { 632 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); 633 goto err; 634 } 635 memcpy(p,s->session->session_id,i); 636 p+=i; 637 } 638 639 /* Ciphers supported */ 640 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0); 641 if (i == 0) 642 { 643 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE); 644 goto err; 645 } 646 s2n(i,p); 647 p+=i; 648 649 /* COMPRESSION */ 650#ifdef OPENSSL_NO_COMP 651 *(p++)=1; 652#else 653 if (s->ctx->comp_methods == NULL) 654 j=0; 655 else 656 j=sk_SSL_COMP_num(s->ctx->comp_methods); 657 *(p++)=1+j; 658 for (i=0; i<j; i++) 659 { 660 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i); 661 *(p++)=comp->id; 662 } 663#endif 664 *(p++)=0; /* Add the NULL method */ 665#ifndef OPENSSL_NO_TLSEXT 666 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL) 667 { 668 SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR); 669 goto err; 670 } 671#endif 672 l=(p-d); 673 d=buf; 674 *(d++)=SSL3_MT_CLIENT_HELLO; 675 l2n3(l,d); 676 677 s->state=SSL3_ST_CW_CLNT_HELLO_B; 678 /* number of bytes to write */ 679 s->init_num=p-buf; 680 s->init_off=0; 681 } 682 683 /* SSL3_ST_CW_CLNT_HELLO_B */ 684 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 685err: 686 return(-1); 687 } 688 689int ssl3_get_server_hello(SSL *s) 690 { 691 STACK_OF(SSL_CIPHER) *sk; 692 SSL_CIPHER *c; 693 unsigned char *p,*d; 694 int i,al,ok; 695 unsigned int j; 696 long n; 697#ifndef OPENSSL_NO_COMP 698 SSL_COMP *comp; 699#endif 700 701 n=s->method->ssl_get_message(s, 702 SSL3_ST_CR_SRVR_HELLO_A, 703 SSL3_ST_CR_SRVR_HELLO_B, 704 -1, 705 20000, /* ?? */ 706 &ok); 707 708 if (!ok) return((int)n); 709 710 if ( SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER) 711 { 712 if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST) 713 { 714 if ( s->d1->send_cookie == 0) 715 { 716 s->s3->tmp.reuse_message = 1; 717 return 1; 718 } 719 else /* already sent a cookie */ 720 { 721 al=SSL_AD_UNEXPECTED_MESSAGE; 722 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE); 723 goto f_err; 724 } 725 } 726 } 727 728 if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO) 729 { 730 al=SSL_AD_UNEXPECTED_MESSAGE; 731 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE); 732 goto f_err; 733 } 734 735 d=p=(unsigned char *)s->init_msg; 736 737 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff))) 738 { 739 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION); 740 s->version=(s->version&0xff00)|p[1]; 741 al=SSL_AD_PROTOCOL_VERSION; 742 goto f_err; 743 } 744 p+=2; 745 746 /* load the server hello data */ 747 /* load the server random */ 748 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE); 749 p+=SSL3_RANDOM_SIZE; 750 751 /* get the session-id */ 752 j= *(p++); 753 754 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE)) 755 { 756 al=SSL_AD_ILLEGAL_PARAMETER; 757 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG); 758 goto f_err; 759 } 760 761 if (j != 0 && j == s->session->session_id_length 762 && memcmp(p,s->session->session_id,j) == 0) 763 { 764 if(s->sid_ctx_length != s->session->sid_ctx_length 765 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length)) 766 { 767 /* actually a client application bug */ 768 al=SSL_AD_ILLEGAL_PARAMETER; 769 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); 770 goto f_err; 771 } 772 s->hit=1; 773 } 774 else /* a miss or crap from the other end */ 775 { 776 /* If we were trying for session-id reuse, make a new 777 * SSL_SESSION so we don't stuff up other people */ 778 s->hit=0; 779 if (s->session->session_id_length > 0) 780 { 781 if (!ssl_get_new_session(s,0)) 782 { 783 al=SSL_AD_INTERNAL_ERROR; 784 goto f_err; 785 } 786 } 787 s->session->session_id_length=j; 788 memcpy(s->session->session_id,p,j); /* j could be 0 */ 789 } 790 p+=j; 791 c=ssl_get_cipher_by_char(s,p); 792 if (c == NULL) 793 { 794 /* unknown cipher */ 795 al=SSL_AD_ILLEGAL_PARAMETER; 796 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED); 797 goto f_err; 798 } 799 p+=ssl_put_cipher_by_char(s,NULL,NULL); 800 801 sk=ssl_get_ciphers_by_id(s); 802 i=sk_SSL_CIPHER_find(sk,c); 803 if (i < 0) 804 { 805 /* we did not say we would use this cipher */ 806 al=SSL_AD_ILLEGAL_PARAMETER; 807 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED); 808 goto f_err; 809 } 810 811 /* Depending on the session caching (internal/external), the cipher 812 and/or cipher_id values may not be set. Make sure that 813 cipher_id is set and use it for comparison. */ 814 if (s->session->cipher) 815 s->session->cipher_id = s->session->cipher->id; 816 if (s->hit && (s->session->cipher_id != c->id)) 817 { 818 if (!(s->options & 819 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG)) 820 { 821 al=SSL_AD_ILLEGAL_PARAMETER; 822 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); 823 goto f_err; 824 } 825 } 826 s->s3->tmp.new_cipher=c; 827 828 /* lets get the compression algorithm */ 829 /* COMPRESSION */ 830#ifdef OPENSSL_NO_COMP 831 if (*(p++) != 0) 832 { 833 al=SSL_AD_ILLEGAL_PARAMETER; 834 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); 835 goto f_err; 836 } 837#else 838 j= *(p++); 839 if (j == 0) 840 comp=NULL; 841 else 842 comp=ssl3_comp_find(s->ctx->comp_methods,j); 843 844 if ((j != 0) && (comp == NULL)) 845 { 846 al=SSL_AD_ILLEGAL_PARAMETER; 847 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); 848 goto f_err; 849 } 850 else 851 { 852 s->s3->tmp.new_compression=comp; 853 } 854#endif 855#ifndef OPENSSL_NO_TLSEXT 856 /* TLS extensions*/ 857 if (s->version >= SSL3_VERSION) 858 { 859 if (!ssl_parse_serverhello_tlsext(s,&p,d,n, &al)) 860 { 861 /* 'al' set by ssl_parse_serverhello_tlsext */ 862 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT); 863 goto f_err; 864 } 865 if (ssl_check_serverhello_tlsext(s) <= 0) 866 { 867 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SERVERHELLO_TLSEXT); 868 goto err; 869 } 870 } 871#endif 872 873 874 if (p != (d+n)) 875 { 876 /* wrong packet length */ 877 al=SSL_AD_DECODE_ERROR; 878 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH); 879 goto err; 880 } 881 882 return(1); 883f_err: 884 ssl3_send_alert(s,SSL3_AL_FATAL,al); 885err: 886 return(-1); 887 } 888 889int ssl3_get_server_certificate(SSL *s) 890 { 891 int al,i,ok,ret= -1; 892 unsigned long n,nc,llen,l; 893 X509 *x=NULL; 894 const unsigned char *q,*p; 895 unsigned char *d; 896 STACK_OF(X509) *sk=NULL; 897 SESS_CERT *sc; 898 EVP_PKEY *pkey=NULL; 899 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */ 900 901 n=s->method->ssl_get_message(s, 902 SSL3_ST_CR_CERT_A, 903 SSL3_ST_CR_CERT_B, 904 -1, 905 s->max_cert_list, 906 &ok); 907 908 if (!ok) return((int)n); 909 910 if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) || 911 ((s->s3->tmp.new_cipher->algorithms & SSL_aKRB5) && 912 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE))) 913 { 914 s->s3->tmp.reuse_message=1; 915 return(1); 916 } 917 918 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE) 919 { 920 al=SSL_AD_UNEXPECTED_MESSAGE; 921 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE); 922 goto f_err; 923 } 924 p=d=(unsigned char *)s->init_msg; 925 926 if ((sk=sk_X509_new_null()) == NULL) 927 { 928 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE); 929 goto err; 930 } 931 932 n2l3(p,llen); 933 if (llen+3 != n) 934 { 935 al=SSL_AD_DECODE_ERROR; 936 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH); 937 goto f_err; 938 } 939 for (nc=0; nc<llen; ) 940 { 941 n2l3(p,l); 942 if ((l+nc+3) > llen) 943 { 944 al=SSL_AD_DECODE_ERROR; 945 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); 946 goto f_err; 947 } 948 949 q=p; 950 x=d2i_X509(NULL,&q,l); 951 if (x == NULL) 952 { 953 al=SSL_AD_BAD_CERTIFICATE; 954 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB); 955 goto f_err; 956 } 957 if (q != (p+l)) 958 { 959 al=SSL_AD_DECODE_ERROR; 960 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); 961 goto f_err; 962 } 963 if (!sk_X509_push(sk,x)) 964 { 965 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE); 966 goto err; 967 } 968 x=NULL; 969 nc+=l+3; 970 p=q; 971 } 972 973 i=ssl_verify_cert_chain(s,sk); 974 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0) 975#ifndef OPENSSL_NO_KRB5 976 && (s->s3->tmp.new_cipher->algorithms & (SSL_MKEY_MASK|SSL_AUTH_MASK)) 977 != (SSL_aKRB5|SSL_kKRB5) 978#endif /* OPENSSL_NO_KRB5 */ 979 ) 980 { 981 al=ssl_verify_alarm_type(s->verify_result); 982 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED); 983 goto f_err; 984 } 985 ERR_clear_error(); /* but we keep s->verify_result */ 986 987 sc=ssl_sess_cert_new(); 988 if (sc == NULL) goto err; 989 990 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert); 991 s->session->sess_cert=sc; 992 993 sc->cert_chain=sk; 994 /* Inconsistency alert: cert_chain does include the peer's 995 * certificate, which we don't include in s3_srvr.c */ 996 x=sk_X509_value(sk,0); 997 sk=NULL; 998 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/ 999 1000 pkey=X509_get_pubkey(x); 1001 1002 /* VRS: allow null cert if auth == KRB5 */ 1003 need_cert = ((s->s3->tmp.new_cipher->algorithms 1004 & (SSL_MKEY_MASK|SSL_AUTH_MASK)) 1005 == (SSL_aKRB5|SSL_kKRB5))? 0: 1; 1006 1007#ifdef KSSL_DEBUG 1008 printf("pkey,x = %p, %p\n", (void *)pkey,(void *)x); 1009 printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey)); 1010 printf("cipher, alg, nc = %s, %lx, %d\n", s->s3->tmp.new_cipher->name, 1011 s->s3->tmp.new_cipher->algorithms, need_cert); 1012#endif /* KSSL_DEBUG */ 1013 1014 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey))) 1015 { 1016 x=NULL; 1017 al=SSL3_AL_FATAL; 1018 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 1019 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); 1020 goto f_err; 1021 } 1022 1023 i=ssl_cert_type(x,pkey); 1024 if (need_cert && i < 0) 1025 { 1026 x=NULL; 1027 al=SSL3_AL_FATAL; 1028 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 1029 SSL_R_UNKNOWN_CERTIFICATE_TYPE); 1030 goto f_err; 1031 } 1032 1033 if (need_cert) 1034 { 1035 sc->peer_cert_type=i; 1036 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509); 1037 /* Why would the following ever happen? 1038 * We just created sc a couple of lines ago. */ 1039 if (sc->peer_pkeys[i].x509 != NULL) 1040 X509_free(sc->peer_pkeys[i].x509); 1041 sc->peer_pkeys[i].x509=x; 1042 sc->peer_key= &(sc->peer_pkeys[i]); 1043 1044 if (s->session->peer != NULL) 1045 X509_free(s->session->peer); 1046 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509); 1047 s->session->peer=x; 1048 } 1049 else 1050 { 1051 sc->peer_cert_type=i; 1052 sc->peer_key= NULL; 1053 1054 if (s->session->peer != NULL) 1055 X509_free(s->session->peer); 1056 s->session->peer=NULL; 1057 } 1058 s->session->verify_result = s->verify_result; 1059 1060 x=NULL; 1061 ret=1; 1062 1063 if (0) 1064 { 1065f_err: 1066 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1067 } 1068err: 1069 EVP_PKEY_free(pkey); 1070 X509_free(x); 1071 sk_X509_pop_free(sk,X509_free); 1072 return(ret); 1073 } 1074 1075int ssl3_get_key_exchange(SSL *s) 1076 { 1077#ifndef OPENSSL_NO_RSA 1078 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2]; 1079#endif 1080 EVP_MD_CTX md_ctx; 1081 unsigned char *param,*p; 1082 int al,i,j,param_len,ok; 1083 long n,alg; 1084 EVP_PKEY *pkey=NULL; 1085#ifndef OPENSSL_NO_RSA 1086 RSA *rsa=NULL; 1087#endif 1088#ifndef OPENSSL_NO_DH 1089 DH *dh=NULL; 1090#endif 1091#ifndef OPENSSL_NO_ECDH 1092 EC_KEY *ecdh = NULL; 1093 BN_CTX *bn_ctx = NULL; 1094 EC_POINT *srvr_ecpoint = NULL; 1095 int curve_nid = 0; 1096 int encoded_pt_len = 0; 1097#endif 1098 1099 /* use same message size as in ssl3_get_certificate_request() 1100 * as ServerKeyExchange message may be skipped */ 1101 n=s->method->ssl_get_message(s, 1102 SSL3_ST_CR_KEY_EXCH_A, 1103 SSL3_ST_CR_KEY_EXCH_B, 1104 -1, 1105 s->max_cert_list, 1106 &ok); 1107 1108 if (!ok) return((int)n); 1109 1110 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE) 1111 { 1112 s->s3->tmp.reuse_message=1; 1113 return(1); 1114 } 1115 1116 param=p=(unsigned char *)s->init_msg; 1117 1118 if (s->session->sess_cert != NULL) 1119 { 1120#ifndef OPENSSL_NO_RSA 1121 if (s->session->sess_cert->peer_rsa_tmp != NULL) 1122 { 1123 RSA_free(s->session->sess_cert->peer_rsa_tmp); 1124 s->session->sess_cert->peer_rsa_tmp=NULL; 1125 } 1126#endif 1127#ifndef OPENSSL_NO_DH 1128 if (s->session->sess_cert->peer_dh_tmp) 1129 { 1130 DH_free(s->session->sess_cert->peer_dh_tmp); 1131 s->session->sess_cert->peer_dh_tmp=NULL; 1132 } 1133#endif 1134#ifndef OPENSSL_NO_ECDH 1135 if (s->session->sess_cert->peer_ecdh_tmp) 1136 { 1137 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp); 1138 s->session->sess_cert->peer_ecdh_tmp=NULL; 1139 } 1140#endif 1141 } 1142 else 1143 { 1144 s->session->sess_cert=ssl_sess_cert_new(); 1145 } 1146 1147 param_len=0; 1148 alg=s->s3->tmp.new_cipher->algorithms; 1149 EVP_MD_CTX_init(&md_ctx); 1150 1151#ifndef OPENSSL_NO_RSA 1152 if (alg & SSL_kRSA) 1153 { 1154 if ((rsa=RSA_new()) == NULL) 1155 { 1156 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1157 goto err; 1158 } 1159 n2s(p,i); 1160 param_len=i+2; 1161 if (param_len > n) 1162 { 1163 al=SSL_AD_DECODE_ERROR; 1164 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH); 1165 goto f_err; 1166 } 1167 if (!(rsa->n=BN_bin2bn(p,i,rsa->n))) 1168 { 1169 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1170 goto err; 1171 } 1172 p+=i; 1173 1174 n2s(p,i); 1175 param_len+=i+2; 1176 if (param_len > n) 1177 { 1178 al=SSL_AD_DECODE_ERROR; 1179 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH); 1180 goto f_err; 1181 } 1182 if (!(rsa->e=BN_bin2bn(p,i,rsa->e))) 1183 { 1184 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1185 goto err; 1186 } 1187 p+=i; 1188 n-=param_len; 1189 1190 /* this should be because we are using an export cipher */ 1191 if (alg & SSL_aRSA) 1192 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1193 else 1194 { 1195 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1196 goto err; 1197 } 1198 s->session->sess_cert->peer_rsa_tmp=rsa; 1199 rsa=NULL; 1200 } 1201#else /* OPENSSL_NO_RSA */ 1202 if (0) 1203 ; 1204#endif 1205#ifndef OPENSSL_NO_DH 1206 else if (alg & SSL_kEDH) 1207 { 1208 if ((dh=DH_new()) == NULL) 1209 { 1210 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB); 1211 goto err; 1212 } 1213 n2s(p,i); 1214 param_len=i+2; 1215 if (param_len > n) 1216 { 1217 al=SSL_AD_DECODE_ERROR; 1218 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH); 1219 goto f_err; 1220 } 1221 if (!(dh->p=BN_bin2bn(p,i,NULL))) 1222 { 1223 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1224 goto err; 1225 } 1226 p+=i; 1227 1228 n2s(p,i); 1229 param_len+=i+2; 1230 if (param_len > n) 1231 { 1232 al=SSL_AD_DECODE_ERROR; 1233 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH); 1234 goto f_err; 1235 } 1236 if (!(dh->g=BN_bin2bn(p,i,NULL))) 1237 { 1238 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1239 goto err; 1240 } 1241 p+=i; 1242 1243 n2s(p,i); 1244 param_len+=i+2; 1245 if (param_len > n) 1246 { 1247 al=SSL_AD_DECODE_ERROR; 1248 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH); 1249 goto f_err; 1250 } 1251 if (!(dh->pub_key=BN_bin2bn(p,i,NULL))) 1252 { 1253 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1254 goto err; 1255 } 1256 p+=i; 1257 n-=param_len; 1258 1259#ifndef OPENSSL_NO_RSA 1260 if (alg & SSL_aRSA) 1261 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1262#else 1263 if (0) 1264 ; 1265#endif 1266#ifndef OPENSSL_NO_DSA 1267 else if (alg & SSL_aDSS) 1268 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509); 1269#endif 1270 /* else anonymous DH, so no certificate or pkey. */ 1271 1272 s->session->sess_cert->peer_dh_tmp=dh; 1273 dh=NULL; 1274 } 1275 else if ((alg & SSL_kDHr) || (alg & SSL_kDHd)) 1276 { 1277 al=SSL_AD_ILLEGAL_PARAMETER; 1278 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER); 1279 goto f_err; 1280 } 1281#endif /* !OPENSSL_NO_DH */ 1282 1283#ifndef OPENSSL_NO_ECDH 1284 else if (alg & SSL_kECDHE) 1285 { 1286 EC_GROUP *ngroup; 1287 const EC_GROUP *group; 1288 1289 if ((ecdh=EC_KEY_new()) == NULL) 1290 { 1291 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1292 goto err; 1293 } 1294 1295 /* Extract elliptic curve parameters and the 1296 * server's ephemeral ECDH public key. 1297 * Keep accumulating lengths of various components in 1298 * param_len and make sure it never exceeds n. 1299 */ 1300 1301 /* XXX: For now we only support named (not generic) curves 1302 * and the ECParameters in this case is just three bytes. 1303 */ 1304 param_len=3; 1305 if ((param_len > n) || 1306 (*p != NAMED_CURVE_TYPE) || 1307 ((curve_nid = curve_id2nid(*(p + 2))) == 0)) 1308 { 1309 al=SSL_AD_INTERNAL_ERROR; 1310 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); 1311 goto f_err; 1312 } 1313 1314 ngroup = EC_GROUP_new_by_curve_name(curve_nid); 1315 if (ngroup == NULL) 1316 { 1317 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB); 1318 goto err; 1319 } 1320 if (EC_KEY_set_group(ecdh, ngroup) == 0) 1321 { 1322 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB); 1323 goto err; 1324 } 1325 EC_GROUP_free(ngroup); 1326 1327 group = EC_KEY_get0_group(ecdh); 1328 1329 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && 1330 (EC_GROUP_get_degree(group) > 163)) 1331 { 1332 al=SSL_AD_EXPORT_RESTRICTION; 1333 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER); 1334 goto f_err; 1335 } 1336 1337 p+=3; 1338 1339 /* Next, get the encoded ECPoint */ 1340 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) || 1341 ((bn_ctx = BN_CTX_new()) == NULL)) 1342 { 1343 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1344 goto err; 1345 } 1346 1347 encoded_pt_len = *p; /* length of encoded point */ 1348 p+=1; 1349 param_len += (1 + encoded_pt_len); 1350 if ((param_len > n) || 1351 (EC_POINT_oct2point(group, srvr_ecpoint, 1352 p, encoded_pt_len, bn_ctx) == 0)) 1353 { 1354 al=SSL_AD_DECODE_ERROR; 1355 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT); 1356 goto f_err; 1357 } 1358 1359 n-=param_len; 1360 p+=encoded_pt_len; 1361 1362 /* The ECC/TLS specification does not mention 1363 * the use of DSA to sign ECParameters in the server 1364 * key exchange message. We do support RSA and ECDSA. 1365 */ 1366 if (0) ; 1367#ifndef OPENSSL_NO_RSA 1368 else if (alg & SSL_aRSA) 1369 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1370#endif 1371#ifndef OPENSSL_NO_ECDSA 1372 else if (alg & SSL_aECDSA) 1373 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509); 1374#endif 1375 /* else anonymous ECDH, so no certificate or pkey. */ 1376 EC_KEY_set_public_key(ecdh, srvr_ecpoint); 1377 s->session->sess_cert->peer_ecdh_tmp=ecdh; 1378 ecdh=NULL; 1379 BN_CTX_free(bn_ctx); 1380 bn_ctx = NULL; 1381 EC_POINT_free(srvr_ecpoint); 1382 srvr_ecpoint = NULL; 1383 } 1384 else if (alg & SSL_kECDH) 1385 { 1386 al=SSL_AD_UNEXPECTED_MESSAGE; 1387 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE); 1388 goto f_err; 1389 } 1390#endif /* !OPENSSL_NO_ECDH */ 1391 if (alg & SSL_aFZA) 1392 { 1393 al=SSL_AD_HANDSHAKE_FAILURE; 1394 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER); 1395 goto f_err; 1396 } 1397 1398 1399 /* p points to the next byte, there are 'n' bytes left */ 1400 1401 /* if it was signed, check the signature */ 1402 if (pkey != NULL) 1403 { 1404 n2s(p,i); 1405 n-=2; 1406 j=EVP_PKEY_size(pkey); 1407 1408 if ((i != n) || (n > j) || (n <= 0)) 1409 { 1410 /* wrong packet length */ 1411 al=SSL_AD_DECODE_ERROR; 1412 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH); 1413 goto f_err; 1414 } 1415 1416#ifndef OPENSSL_NO_RSA 1417 if (pkey->type == EVP_PKEY_RSA) 1418 { 1419 int num; 1420 1421 j=0; 1422 q=md_buf; 1423 for (num=2; num > 0; num--) 1424 { 1425 EVP_MD_CTX_set_flags(&md_ctx, 1426 EVP_MD_CTX_FLAG_NON_FIPS_ALLOW); 1427 EVP_DigestInit_ex(&md_ctx,(num == 2) 1428 ?s->ctx->md5:s->ctx->sha1, NULL); 1429 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); 1430 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); 1431 EVP_DigestUpdate(&md_ctx,param,param_len); 1432 EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i); 1433 q+=i; 1434 j+=i; 1435 } 1436 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n, 1437 pkey->pkey.rsa); 1438 if (i < 0) 1439 { 1440 al=SSL_AD_DECRYPT_ERROR; 1441 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT); 1442 goto f_err; 1443 } 1444 if (i == 0) 1445 { 1446 /* bad signature */ 1447 al=SSL_AD_DECRYPT_ERROR; 1448 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE); 1449 goto f_err; 1450 } 1451 } 1452 else 1453#endif 1454#ifndef OPENSSL_NO_DSA 1455 if (pkey->type == EVP_PKEY_DSA) 1456 { 1457 /* lets do DSS */ 1458 EVP_VerifyInit_ex(&md_ctx,EVP_dss1(), NULL); 1459 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); 1460 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); 1461 EVP_VerifyUpdate(&md_ctx,param,param_len); 1462 if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0) 1463 { 1464 /* bad signature */ 1465 al=SSL_AD_DECRYPT_ERROR; 1466 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE); 1467 goto f_err; 1468 } 1469 } 1470 else 1471#endif 1472#ifndef OPENSSL_NO_ECDSA 1473 if (pkey->type == EVP_PKEY_EC) 1474 { 1475 /* let's do ECDSA */ 1476 EVP_VerifyInit_ex(&md_ctx,EVP_ecdsa(), NULL); 1477 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); 1478 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); 1479 EVP_VerifyUpdate(&md_ctx,param,param_len); 1480 if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0) 1481 { 1482 /* bad signature */ 1483 al=SSL_AD_DECRYPT_ERROR; 1484 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE); 1485 goto f_err; 1486 } 1487 } 1488 else 1489#endif 1490 { 1491 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1492 goto err; 1493 } 1494 } 1495 else 1496 { 1497 /* still data left over */ 1498 if (!(alg & SSL_aNULL)) 1499 { 1500 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1501 goto err; 1502 } 1503 if (n != 0) 1504 { 1505 al=SSL_AD_DECODE_ERROR; 1506 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE); 1507 goto f_err; 1508 } 1509 } 1510 EVP_PKEY_free(pkey); 1511 EVP_MD_CTX_cleanup(&md_ctx); 1512 return(1); 1513f_err: 1514 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1515err: 1516 EVP_PKEY_free(pkey); 1517#ifndef OPENSSL_NO_RSA 1518 if (rsa != NULL) 1519 RSA_free(rsa); 1520#endif 1521#ifndef OPENSSL_NO_DH 1522 if (dh != NULL) 1523 DH_free(dh); 1524#endif 1525#ifndef OPENSSL_NO_ECDH 1526 BN_CTX_free(bn_ctx); 1527 EC_POINT_free(srvr_ecpoint); 1528 if (ecdh != NULL) 1529 EC_KEY_free(ecdh); 1530#endif 1531 EVP_MD_CTX_cleanup(&md_ctx); 1532 return(-1); 1533 } 1534 1535int ssl3_get_certificate_request(SSL *s) 1536 { 1537 int ok,ret=0; 1538 unsigned long n,nc,l; 1539 unsigned int llen,ctype_num,i; 1540 X509_NAME *xn=NULL; 1541 const unsigned char *p,*q; 1542 unsigned char *d; 1543 STACK_OF(X509_NAME) *ca_sk=NULL; 1544 1545 n=s->method->ssl_get_message(s, 1546 SSL3_ST_CR_CERT_REQ_A, 1547 SSL3_ST_CR_CERT_REQ_B, 1548 -1, 1549 s->max_cert_list, 1550 &ok); 1551 1552 if (!ok) return((int)n); 1553 1554 s->s3->tmp.cert_req=0; 1555 1556 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE) 1557 { 1558 s->s3->tmp.reuse_message=1; 1559 return(1); 1560 } 1561 1562 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST) 1563 { 1564 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 1565 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE); 1566 goto err; 1567 } 1568 1569 /* TLS does not like anon-DH with client cert */ 1570 if (s->version > SSL3_VERSION) 1571 { 1572 l=s->s3->tmp.new_cipher->algorithms; 1573 if (l & SSL_aNULL) 1574 { 1575 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 1576 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER); 1577 goto err; 1578 } 1579 } 1580 1581 p=d=(unsigned char *)s->init_msg; 1582 1583 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL) 1584 { 1585 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE); 1586 goto err; 1587 } 1588 1589 /* get the certificate types */ 1590 ctype_num= *(p++); 1591 if (ctype_num > SSL3_CT_NUMBER) 1592 ctype_num=SSL3_CT_NUMBER; 1593 for (i=0; i<ctype_num; i++) 1594 s->s3->tmp.ctype[i]= p[i]; 1595 p+=ctype_num; 1596 1597 /* get the CA RDNs */ 1598 n2s(p,llen); 1599#if 0 1600{ 1601FILE *out; 1602out=fopen("/tmp/vsign.der","w"); 1603fwrite(p,1,llen,out); 1604fclose(out); 1605} 1606#endif 1607 1608 if ((llen+ctype_num+2+1) != n) 1609 { 1610 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1611 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH); 1612 goto err; 1613 } 1614 1615 for (nc=0; nc<llen; ) 1616 { 1617 n2s(p,l); 1618 if ((l+nc+2) > llen) 1619 { 1620 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG)) 1621 goto cont; /* netscape bugs */ 1622 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1623 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG); 1624 goto err; 1625 } 1626 1627 q=p; 1628 1629 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL) 1630 { 1631 /* If netscape tolerance is on, ignore errors */ 1632 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG) 1633 goto cont; 1634 else 1635 { 1636 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1637 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB); 1638 goto err; 1639 } 1640 } 1641 1642 if (q != (p+l)) 1643 { 1644 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1645 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH); 1646 goto err; 1647 } 1648 if (!sk_X509_NAME_push(ca_sk,xn)) 1649 { 1650 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE); 1651 goto err; 1652 } 1653 1654 p+=l; 1655 nc+=l+2; 1656 } 1657 1658 if (0) 1659 { 1660cont: 1661 ERR_clear_error(); 1662 } 1663 1664 /* we should setup a certificate to return.... */ 1665 s->s3->tmp.cert_req=1; 1666 s->s3->tmp.ctype_num=ctype_num; 1667 if (s->s3->tmp.ca_names != NULL) 1668 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free); 1669 s->s3->tmp.ca_names=ca_sk; 1670 ca_sk=NULL; 1671 1672 ret=1; 1673err: 1674 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free); 1675 return(ret); 1676 } 1677 1678static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b) 1679 { 1680 return(X509_NAME_cmp(*a,*b)); 1681 } 1682#ifndef OPENSSL_NO_TLSEXT 1683int ssl3_get_new_session_ticket(SSL *s) 1684 { 1685 int ok,al,ret=0, ticklen; 1686 long n; 1687 const unsigned char *p; 1688 unsigned char *d; 1689 1690 n=s->method->ssl_get_message(s, 1691 SSL3_ST_CR_SESSION_TICKET_A, 1692 SSL3_ST_CR_SESSION_TICKET_B, 1693 -1, 1694 16384, 1695 &ok); 1696 1697 if (!ok) 1698 return((int)n); 1699 1700 if (s->s3->tmp.message_type == SSL3_MT_FINISHED) 1701 { 1702 s->s3->tmp.reuse_message=1; 1703 return(1); 1704 } 1705 if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET) 1706 { 1707 al=SSL_AD_UNEXPECTED_MESSAGE; 1708 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_BAD_MESSAGE_TYPE); 1709 goto f_err; 1710 } 1711 if (n < 6) 1712 { 1713 /* need at least ticket_lifetime_hint + ticket length */ 1714 al = SSL3_AL_FATAL,SSL_AD_DECODE_ERROR; 1715 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH); 1716 goto f_err; 1717 } 1718 1719 p=d=(unsigned char *)s->init_msg; 1720 n2l(p, s->session->tlsext_tick_lifetime_hint); 1721 n2s(p, ticklen); 1722 /* ticket_lifetime_hint + ticket_length + ticket */ 1723 if (ticklen + 6 != n) 1724 { 1725 al = SSL3_AL_FATAL,SSL_AD_DECODE_ERROR; 1726 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH); 1727 goto f_err; 1728 } 1729 if (s->session->tlsext_tick) 1730 { 1731 OPENSSL_free(s->session->tlsext_tick); 1732 s->session->tlsext_ticklen = 0; 1733 } 1734 s->session->tlsext_tick = OPENSSL_malloc(ticklen); 1735 if (!s->session->tlsext_tick) 1736 { 1737 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE); 1738 goto err; 1739 } 1740 memcpy(s->session->tlsext_tick, p, ticklen); 1741 s->session->tlsext_ticklen = ticklen; 1742 /* There are two ways to detect a resumed ticket sesion. 1743 * One is to set an appropriate session ID and then the server 1744 * must return a match in ServerHello. This allows the normal 1745 * client session ID matching to work and we know much 1746 * earlier that the ticket has been accepted. 1747 * 1748 * The other way is to set zero length session ID when the 1749 * ticket is presented and rely on the handshake to determine 1750 * session resumption. 1751 * 1752 * We choose the former approach because this fits in with 1753 * assumptions elsewhere in OpenSSL. The session ID is set 1754 * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the 1755 * ticket. 1756 */ 1757 EVP_Digest(p, ticklen, 1758 s->session->session_id, &s->session->session_id_length, 1759#ifndef OPENSSL_NO_SHA256 1760 EVP_sha256(), NULL); 1761#else 1762 EVP_sha1(), NULL); 1763#endif 1764 ret=1; 1765 return(ret); 1766f_err: 1767 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1768err: 1769 return(-1); 1770 } 1771 1772int ssl3_get_cert_status(SSL *s) 1773 { 1774 int ok, al; 1775 unsigned long resplen; 1776 long n; 1777 const unsigned char *p; 1778 1779 n=s->method->ssl_get_message(s, 1780 SSL3_ST_CR_CERT_STATUS_A, 1781 SSL3_ST_CR_CERT_STATUS_B, 1782 SSL3_MT_CERTIFICATE_STATUS, 1783 16384, 1784 &ok); 1785 1786 if (!ok) return((int)n); 1787 if (n < 4) 1788 { 1789 /* need at least status type + length */ 1790 al = SSL_AD_DECODE_ERROR; 1791 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH); 1792 goto f_err; 1793 } 1794 p = (unsigned char *)s->init_msg; 1795 if (*p++ != TLSEXT_STATUSTYPE_ocsp) 1796 { 1797 al = SSL_AD_DECODE_ERROR; 1798 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_UNSUPPORTED_STATUS_TYPE); 1799 goto f_err; 1800 } 1801 n2l3(p, resplen); 1802 if (resplen + 4 != (unsigned long)n) 1803 { 1804 al = SSL_AD_DECODE_ERROR; 1805 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH); 1806 goto f_err; 1807 } 1808 if (s->tlsext_ocsp_resp) 1809 OPENSSL_free(s->tlsext_ocsp_resp); 1810 s->tlsext_ocsp_resp = BUF_memdup(p, resplen); 1811 if (!s->tlsext_ocsp_resp) 1812 { 1813 al = SSL_AD_INTERNAL_ERROR; 1814 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE); 1815 goto f_err; 1816 } 1817 s->tlsext_ocsp_resplen = resplen; 1818 if (s->ctx->tlsext_status_cb) 1819 { 1820 int ret; 1821 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg); 1822 if (ret == 0) 1823 { 1824 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE; 1825 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_INVALID_STATUS_RESPONSE); 1826 goto f_err; 1827 } 1828 if (ret < 0) 1829 { 1830 al = SSL_AD_INTERNAL_ERROR; 1831 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE); 1832 goto f_err; 1833 } 1834 } 1835 return 1; 1836f_err: 1837 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1838 return(-1); 1839 } 1840#endif 1841 1842int ssl3_get_server_done(SSL *s) 1843 { 1844 int ok,ret=0; 1845 long n; 1846 1847 n=s->method->ssl_get_message(s, 1848 SSL3_ST_CR_SRVR_DONE_A, 1849 SSL3_ST_CR_SRVR_DONE_B, 1850 SSL3_MT_SERVER_DONE, 1851 30, /* should be very small, like 0 :-) */ 1852 &ok); 1853 1854 if (!ok) return((int)n); 1855 if (n > 0) 1856 { 1857 /* should contain no data */ 1858 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1859 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH); 1860 return -1; 1861 } 1862 ret=1; 1863 return(ret); 1864 } 1865 1866 1867int ssl3_send_client_key_exchange(SSL *s) 1868 { 1869 unsigned char *p,*d; 1870 int n; 1871 unsigned long l; 1872#ifndef OPENSSL_NO_RSA 1873 unsigned char *q; 1874 EVP_PKEY *pkey=NULL; 1875#endif 1876#ifndef OPENSSL_NO_KRB5 1877 KSSL_ERR kssl_err; 1878#endif /* OPENSSL_NO_KRB5 */ 1879#ifndef OPENSSL_NO_ECDH 1880 EC_KEY *clnt_ecdh = NULL; 1881 const EC_POINT *srvr_ecpoint = NULL; 1882 EVP_PKEY *srvr_pub_pkey = NULL; 1883 unsigned char *encodedPoint = NULL; 1884 int encoded_pt_len = 0; 1885 BN_CTX * bn_ctx = NULL; 1886#endif 1887 1888 if (s->state == SSL3_ST_CW_KEY_EXCH_A) 1889 { 1890 d=(unsigned char *)s->init_buf->data; 1891 p= &(d[4]); 1892 1893 l=s->s3->tmp.new_cipher->algorithms; 1894 1895 /* Fool emacs indentation */ 1896 if (0) {} 1897#ifndef OPENSSL_NO_RSA 1898 else if (l & SSL_kRSA) 1899 { 1900 RSA *rsa; 1901 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; 1902 1903 if (s->session->sess_cert->peer_rsa_tmp != NULL) 1904 rsa=s->session->sess_cert->peer_rsa_tmp; 1905 else 1906 { 1907 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1908 if ((pkey == NULL) || 1909 (pkey->type != EVP_PKEY_RSA) || 1910 (pkey->pkey.rsa == NULL)) 1911 { 1912 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1913 goto err; 1914 } 1915 rsa=pkey->pkey.rsa; 1916 EVP_PKEY_free(pkey); 1917 } 1918 1919 tmp_buf[0]=s->client_version>>8; 1920 tmp_buf[1]=s->client_version&0xff; 1921 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0) 1922 goto err; 1923 1924 s->session->master_key_length=sizeof tmp_buf; 1925 1926 q=p; 1927 /* Fix buf for TLS and beyond */ 1928 if (s->version > SSL3_VERSION) 1929 p+=2; 1930 n=RSA_public_encrypt(sizeof tmp_buf, 1931 tmp_buf,p,rsa,RSA_PKCS1_PADDING); 1932#ifdef PKCS1_CHECK 1933 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++; 1934 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70; 1935#endif 1936 if (n <= 0) 1937 { 1938 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT); 1939 goto err; 1940 } 1941 1942 /* Fix buf for TLS and beyond */ 1943 if (s->version > SSL3_VERSION) 1944 { 1945 s2n(n,q); 1946 n+=2; 1947 } 1948 1949 s->session->master_key_length= 1950 s->method->ssl3_enc->generate_master_secret(s, 1951 s->session->master_key, 1952 tmp_buf,sizeof tmp_buf); 1953 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf); 1954 } 1955#endif 1956#ifndef OPENSSL_NO_KRB5 1957 else if (l & SSL_kKRB5) 1958 { 1959 krb5_error_code krb5rc; 1960 KSSL_CTX *kssl_ctx = s->kssl_ctx; 1961 /* krb5_data krb5_ap_req; */ 1962 krb5_data *enc_ticket; 1963 krb5_data authenticator, *authp = NULL; 1964 EVP_CIPHER_CTX ciph_ctx; 1965 EVP_CIPHER *enc = NULL; 1966 unsigned char iv[EVP_MAX_IV_LENGTH]; 1967 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; 1968 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH 1969 + EVP_MAX_IV_LENGTH]; 1970 int padl, outl = sizeof(epms); 1971 1972 EVP_CIPHER_CTX_init(&ciph_ctx); 1973 1974#ifdef KSSL_DEBUG 1975 printf("ssl3_send_client_key_exchange(%lx & %lx)\n", 1976 l, SSL_kKRB5); 1977#endif /* KSSL_DEBUG */ 1978 1979 authp = NULL; 1980#ifdef KRB5SENDAUTH 1981 if (KRB5SENDAUTH) authp = &authenticator; 1982#endif /* KRB5SENDAUTH */ 1983 1984 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp, 1985 &kssl_err); 1986 enc = kssl_map_enc(kssl_ctx->enctype); 1987 if (enc == NULL) 1988 goto err; 1989#ifdef KSSL_DEBUG 1990 { 1991 printf("kssl_cget_tkt rtn %d\n", krb5rc); 1992 if (krb5rc && kssl_err.text) 1993 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text); 1994 } 1995#endif /* KSSL_DEBUG */ 1996 1997 if (krb5rc) 1998 { 1999 ssl3_send_alert(s,SSL3_AL_FATAL, 2000 SSL_AD_HANDSHAKE_FAILURE); 2001 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2002 kssl_err.reason); 2003 goto err; 2004 } 2005 2006 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ 2007 ** in place of RFC 2712 KerberosWrapper, as in: 2008 ** 2009 ** Send ticket (copy to *p, set n = length) 2010 ** n = krb5_ap_req.length; 2011 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length); 2012 ** if (krb5_ap_req.data) 2013 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req); 2014 ** 2015 ** Now using real RFC 2712 KerberosWrapper 2016 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>) 2017 ** Note: 2712 "opaque" types are here replaced 2018 ** with a 2-byte length followed by the value. 2019 ** Example: 2020 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms 2021 ** Where "xx xx" = length bytes. Shown here with 2022 ** optional authenticator omitted. 2023 */ 2024 2025 /* KerberosWrapper.Ticket */ 2026 s2n(enc_ticket->length,p); 2027 memcpy(p, enc_ticket->data, enc_ticket->length); 2028 p+= enc_ticket->length; 2029 n = enc_ticket->length + 2; 2030 2031 /* KerberosWrapper.Authenticator */ 2032 if (authp && authp->length) 2033 { 2034 s2n(authp->length,p); 2035 memcpy(p, authp->data, authp->length); 2036 p+= authp->length; 2037 n+= authp->length + 2; 2038 2039 free(authp->data); 2040 authp->data = NULL; 2041 authp->length = 0; 2042 } 2043 else 2044 { 2045 s2n(0,p);/* null authenticator length */ 2046 n+=2; 2047 } 2048 2049 tmp_buf[0]=s->client_version>>8; 2050 tmp_buf[1]=s->client_version&0xff; 2051 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0) 2052 goto err; 2053 2054 /* 20010420 VRS. Tried it this way; failed. 2055 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL); 2056 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx, 2057 ** kssl_ctx->length); 2058 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv); 2059 */ 2060 2061 memset(iv, 0, sizeof iv); /* per RFC 1510 */ 2062 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL, 2063 kssl_ctx->key,iv); 2064 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf, 2065 sizeof tmp_buf); 2066 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl); 2067 outl += padl; 2068 if (outl > sizeof epms) 2069 { 2070 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); 2071 goto err; 2072 } 2073 EVP_CIPHER_CTX_cleanup(&ciph_ctx); 2074 2075 /* KerberosWrapper.EncryptedPreMasterSecret */ 2076 s2n(outl,p); 2077 memcpy(p, epms, outl); 2078 p+=outl; 2079 n+=outl + 2; 2080 2081 s->session->master_key_length= 2082 s->method->ssl3_enc->generate_master_secret(s, 2083 s->session->master_key, 2084 tmp_buf, sizeof tmp_buf); 2085 2086 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf); 2087 OPENSSL_cleanse(epms, outl); 2088 } 2089#endif 2090#ifndef OPENSSL_NO_DH 2091 else if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) 2092 { 2093 DH *dh_srvr,*dh_clnt; 2094 2095 if (s->session->sess_cert == NULL) 2096 { 2097 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 2098 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE); 2099 goto err; 2100 } 2101 2102 if (s->session->sess_cert->peer_dh_tmp != NULL) 2103 dh_srvr=s->session->sess_cert->peer_dh_tmp; 2104 else 2105 { 2106 /* we get them from the cert */ 2107 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); 2108 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS); 2109 goto err; 2110 } 2111 2112 /* generate a new random key */ 2113 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL) 2114 { 2115 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 2116 goto err; 2117 } 2118 if (!DH_generate_key(dh_clnt)) 2119 { 2120 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 2121 goto err; 2122 } 2123 2124 /* use the 'p' output buffer for the DH key, but 2125 * make sure to clear it out afterwards */ 2126 2127 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt); 2128 2129 if (n <= 0) 2130 { 2131 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 2132 goto err; 2133 } 2134 2135 /* generate master key from the result */ 2136 s->session->master_key_length= 2137 s->method->ssl3_enc->generate_master_secret(s, 2138 s->session->master_key,p,n); 2139 /* clean up */ 2140 memset(p,0,n); 2141 2142 /* send off the data */ 2143 n=BN_num_bytes(dh_clnt->pub_key); 2144 s2n(n,p); 2145 BN_bn2bin(dh_clnt->pub_key,p); 2146 n+=2; 2147 2148 DH_free(dh_clnt); 2149 2150 /* perhaps clean things up a bit EAY EAY EAY EAY*/ 2151 } 2152#endif 2153 2154#ifndef OPENSSL_NO_ECDH 2155 else if ((l & SSL_kECDH) || (l & SSL_kECDHE)) 2156 { 2157 const EC_GROUP *srvr_group = NULL; 2158 EC_KEY *tkey; 2159 int ecdh_clnt_cert = 0; 2160 int field_size = 0; 2161 2162 /* Did we send out the client's 2163 * ECDH share for use in premaster 2164 * computation as part of client certificate? 2165 * If so, set ecdh_clnt_cert to 1. 2166 */ 2167 if ((l & SSL_kECDH) && (s->cert != NULL)) 2168 { 2169 /* XXX: For now, we do not support client 2170 * authentication using ECDH certificates. 2171 * To add such support, one needs to add 2172 * code that checks for appropriate 2173 * conditions and sets ecdh_clnt_cert to 1. 2174 * For example, the cert have an ECC 2175 * key on the same curve as the server's 2176 * and the key should be authorized for 2177 * key agreement. 2178 * 2179 * One also needs to add code in ssl3_connect 2180 * to skip sending the certificate verify 2181 * message. 2182 * 2183 * if ((s->cert->key->privatekey != NULL) && 2184 * (s->cert->key->privatekey->type == 2185 * EVP_PKEY_EC) && ...) 2186 * ecdh_clnt_cert = 1; 2187 */ 2188 } 2189 2190 if (s->session->sess_cert->peer_ecdh_tmp != NULL) 2191 { 2192 tkey = s->session->sess_cert->peer_ecdh_tmp; 2193 } 2194 else 2195 { 2196 /* Get the Server Public Key from Cert */ 2197 srvr_pub_pkey = X509_get_pubkey(s->session-> \ 2198 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509); 2199 if ((srvr_pub_pkey == NULL) || 2200 (srvr_pub_pkey->type != EVP_PKEY_EC) || 2201 (srvr_pub_pkey->pkey.ec == NULL)) 2202 { 2203 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2204 ERR_R_INTERNAL_ERROR); 2205 goto err; 2206 } 2207 2208 tkey = srvr_pub_pkey->pkey.ec; 2209 } 2210 2211 srvr_group = EC_KEY_get0_group(tkey); 2212 srvr_ecpoint = EC_KEY_get0_public_key(tkey); 2213 2214 if ((srvr_group == NULL) || (srvr_ecpoint == NULL)) 2215 { 2216 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2217 ERR_R_INTERNAL_ERROR); 2218 goto err; 2219 } 2220 2221 if ((clnt_ecdh=EC_KEY_new()) == NULL) 2222 { 2223 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2224 goto err; 2225 } 2226 2227 if (!EC_KEY_set_group(clnt_ecdh, srvr_group)) 2228 { 2229 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB); 2230 goto err; 2231 } 2232 if (ecdh_clnt_cert) 2233 { 2234 /* Reuse key info from our certificate 2235 * We only need our private key to perform 2236 * the ECDH computation. 2237 */ 2238 const BIGNUM *priv_key; 2239 tkey = s->cert->key->privatekey->pkey.ec; 2240 priv_key = EC_KEY_get0_private_key(tkey); 2241 if (priv_key == NULL) 2242 { 2243 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2244 goto err; 2245 } 2246 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key)) 2247 { 2248 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB); 2249 goto err; 2250 } 2251 } 2252 else 2253 { 2254 /* Generate a new ECDH key pair */ 2255 if (!(EC_KEY_generate_key(clnt_ecdh))) 2256 { 2257 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB); 2258 goto err; 2259 } 2260 } 2261 2262 /* use the 'p' output buffer for the ECDH key, but 2263 * make sure to clear it out afterwards 2264 */ 2265 2266 field_size = EC_GROUP_get_degree(srvr_group); 2267 if (field_size <= 0) 2268 { 2269 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2270 ERR_R_ECDH_LIB); 2271 goto err; 2272 } 2273 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL); 2274 if (n <= 0) 2275 { 2276 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2277 ERR_R_ECDH_LIB); 2278 goto err; 2279 } 2280 2281 /* generate master key from the result */ 2282 s->session->master_key_length = s->method->ssl3_enc \ 2283 -> generate_master_secret(s, 2284 s->session->master_key, 2285 p, n); 2286 2287 memset(p, 0, n); /* clean up */ 2288 2289 if (ecdh_clnt_cert) 2290 { 2291 /* Send empty client key exch message */ 2292 n = 0; 2293 } 2294 else 2295 { 2296 /* First check the size of encoding and 2297 * allocate memory accordingly. 2298 */ 2299 encoded_pt_len = 2300 EC_POINT_point2oct(srvr_group, 2301 EC_KEY_get0_public_key(clnt_ecdh), 2302 POINT_CONVERSION_UNCOMPRESSED, 2303 NULL, 0, NULL); 2304 2305 encodedPoint = (unsigned char *) 2306 OPENSSL_malloc(encoded_pt_len * 2307 sizeof(unsigned char)); 2308 bn_ctx = BN_CTX_new(); 2309 if ((encodedPoint == NULL) || 2310 (bn_ctx == NULL)) 2311 { 2312 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2313 goto err; 2314 } 2315 2316 /* Encode the public key */ 2317 n = EC_POINT_point2oct(srvr_group, 2318 EC_KEY_get0_public_key(clnt_ecdh), 2319 POINT_CONVERSION_UNCOMPRESSED, 2320 encodedPoint, encoded_pt_len, bn_ctx); 2321 2322 *p = n; /* length of encoded point */ 2323 /* Encoded point will be copied here */ 2324 p += 1; 2325 /* copy the point */ 2326 memcpy((unsigned char *)p, encodedPoint, n); 2327 /* increment n to account for length field */ 2328 n += 1; 2329 } 2330 2331 /* Free allocated memory */ 2332 BN_CTX_free(bn_ctx); 2333 if (encodedPoint != NULL) OPENSSL_free(encodedPoint); 2334 if (clnt_ecdh != NULL) 2335 EC_KEY_free(clnt_ecdh); 2336 EVP_PKEY_free(srvr_pub_pkey); 2337 } 2338#endif /* !OPENSSL_NO_ECDH */ 2339 else 2340 { 2341 ssl3_send_alert(s, SSL3_AL_FATAL, 2342 SSL_AD_HANDSHAKE_FAILURE); 2343 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2344 ERR_R_INTERNAL_ERROR); 2345 goto err; 2346 } 2347 2348 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE; 2349 l2n3(n,d); 2350 2351 s->state=SSL3_ST_CW_KEY_EXCH_B; 2352 /* number of bytes to write */ 2353 s->init_num=n+4; 2354 s->init_off=0; 2355 } 2356 2357 /* SSL3_ST_CW_KEY_EXCH_B */ 2358 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 2359err: 2360#ifndef OPENSSL_NO_ECDH 2361 BN_CTX_free(bn_ctx); 2362 if (encodedPoint != NULL) OPENSSL_free(encodedPoint); 2363 if (clnt_ecdh != NULL) 2364 EC_KEY_free(clnt_ecdh); 2365 EVP_PKEY_free(srvr_pub_pkey); 2366#endif 2367 return(-1); 2368 } 2369 2370int ssl3_send_client_verify(SSL *s) 2371 { 2372 unsigned char *p,*d; 2373 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH]; 2374 EVP_PKEY *pkey; 2375#ifndef OPENSSL_NO_RSA 2376 unsigned u=0; 2377#endif 2378 unsigned long n; 2379#if !defined(OPENSSL_NO_DSA) || !defined(OPENSSL_NO_ECDSA) 2380 int j; 2381#endif 2382 2383 if (s->state == SSL3_ST_CW_CERT_VRFY_A) 2384 { 2385 d=(unsigned char *)s->init_buf->data; 2386 p= &(d[4]); 2387 pkey=s->cert->key->privatekey; 2388 2389 s->method->ssl3_enc->cert_verify_mac(s,&(s->s3->finish_dgst2), 2390 &(data[MD5_DIGEST_LENGTH])); 2391 2392#ifndef OPENSSL_NO_RSA 2393 if (pkey->type == EVP_PKEY_RSA) 2394 { 2395 s->method->ssl3_enc->cert_verify_mac(s, 2396 &(s->s3->finish_dgst1),&(data[0])); 2397 if (RSA_sign(NID_md5_sha1, data, 2398 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH, 2399 &(p[2]), &u, pkey->pkey.rsa) <= 0 ) 2400 { 2401 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB); 2402 goto err; 2403 } 2404 s2n(u,p); 2405 n=u+2; 2406 } 2407 else 2408#endif 2409#ifndef OPENSSL_NO_DSA 2410 if (pkey->type == EVP_PKEY_DSA) 2411 { 2412 if (!DSA_sign(pkey->save_type, 2413 &(data[MD5_DIGEST_LENGTH]), 2414 SHA_DIGEST_LENGTH,&(p[2]), 2415 (unsigned int *)&j,pkey->pkey.dsa)) 2416 { 2417 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB); 2418 goto err; 2419 } 2420 s2n(j,p); 2421 n=j+2; 2422 } 2423 else 2424#endif 2425#ifndef OPENSSL_NO_ECDSA 2426 if (pkey->type == EVP_PKEY_EC) 2427 { 2428 if (!ECDSA_sign(pkey->save_type, 2429 &(data[MD5_DIGEST_LENGTH]), 2430 SHA_DIGEST_LENGTH,&(p[2]), 2431 (unsigned int *)&j,pkey->pkey.ec)) 2432 { 2433 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, 2434 ERR_R_ECDSA_LIB); 2435 goto err; 2436 } 2437 s2n(j,p); 2438 n=j+2; 2439 } 2440 else 2441#endif 2442 { 2443 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR); 2444 goto err; 2445 } 2446 *(d++)=SSL3_MT_CERTIFICATE_VERIFY; 2447 l2n3(n,d); 2448 2449 s->state=SSL3_ST_CW_CERT_VRFY_B; 2450 s->init_num=(int)n+4; 2451 s->init_off=0; 2452 } 2453 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 2454err: 2455 return(-1); 2456 } 2457 2458int ssl3_send_client_certificate(SSL *s) 2459 { 2460 X509 *x509=NULL; 2461 EVP_PKEY *pkey=NULL; 2462 int i; 2463 unsigned long l; 2464 2465 if (s->state == SSL3_ST_CW_CERT_A) 2466 { 2467 if ((s->cert == NULL) || 2468 (s->cert->key->x509 == NULL) || 2469 (s->cert->key->privatekey == NULL)) 2470 s->state=SSL3_ST_CW_CERT_B; 2471 else 2472 s->state=SSL3_ST_CW_CERT_C; 2473 } 2474 2475 /* We need to get a client cert */ 2476 if (s->state == SSL3_ST_CW_CERT_B) 2477 { 2478 /* If we get an error, we need to 2479 * ssl->rwstate=SSL_X509_LOOKUP; return(-1); 2480 * We then get retied later */ 2481 i=0; 2482 i = ssl_do_client_cert_cb(s, &x509, &pkey); 2483 if (i < 0) 2484 { 2485 s->rwstate=SSL_X509_LOOKUP; 2486 return(-1); 2487 } 2488 s->rwstate=SSL_NOTHING; 2489 if ((i == 1) && (pkey != NULL) && (x509 != NULL)) 2490 { 2491 s->state=SSL3_ST_CW_CERT_B; 2492 if ( !SSL_use_certificate(s,x509) || 2493 !SSL_use_PrivateKey(s,pkey)) 2494 i=0; 2495 } 2496 else if (i == 1) 2497 { 2498 i=0; 2499 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); 2500 } 2501 2502 if (x509 != NULL) X509_free(x509); 2503 if (pkey != NULL) EVP_PKEY_free(pkey); 2504 if (i == 0) 2505 { 2506 if (s->version == SSL3_VERSION) 2507 { 2508 s->s3->tmp.cert_req=0; 2509 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE); 2510 return(1); 2511 } 2512 else 2513 { 2514 s->s3->tmp.cert_req=2; 2515 } 2516 } 2517 2518 /* Ok, we have a cert */ 2519 s->state=SSL3_ST_CW_CERT_C; 2520 } 2521 2522 if (s->state == SSL3_ST_CW_CERT_C) 2523 { 2524 s->state=SSL3_ST_CW_CERT_D; 2525 l=ssl3_output_cert_chain(s, 2526 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509); 2527 s->init_num=(int)l; 2528 s->init_off=0; 2529 } 2530 /* SSL3_ST_CW_CERT_D */ 2531 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 2532 } 2533 2534#define has_bits(i,m) (((i)&(m)) == (m)) 2535 2536int ssl3_check_cert_and_algorithm(SSL *s) 2537 { 2538 int i,idx; 2539 long algs; 2540 EVP_PKEY *pkey=NULL; 2541 SESS_CERT *sc; 2542#ifndef OPENSSL_NO_RSA 2543 RSA *rsa; 2544#endif 2545#ifndef OPENSSL_NO_DH 2546 DH *dh; 2547#endif 2548 2549 sc=s->session->sess_cert; 2550 2551 algs=s->s3->tmp.new_cipher->algorithms; 2552 2553 /* we don't have a certificate */ 2554 if (algs & (SSL_aDH|SSL_aNULL|SSL_aKRB5)) 2555 return(1); 2556 2557 if (sc == NULL) 2558 { 2559 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR); 2560 goto err; 2561 } 2562 2563#ifndef OPENSSL_NO_RSA 2564 rsa=s->session->sess_cert->peer_rsa_tmp; 2565#endif 2566#ifndef OPENSSL_NO_DH 2567 dh=s->session->sess_cert->peer_dh_tmp; 2568#endif 2569 2570 /* This is the passed certificate */ 2571 2572 idx=sc->peer_cert_type; 2573#ifndef OPENSSL_NO_ECDH 2574 if (idx == SSL_PKEY_ECC) 2575 { 2576 if (check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509, 2577 s->s3->tmp.new_cipher) == 0) 2578 { /* check failed */ 2579 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT); 2580 goto f_err; 2581 } 2582 else 2583 { 2584 return 1; 2585 } 2586 } 2587#endif 2588 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509); 2589 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey); 2590 EVP_PKEY_free(pkey); 2591 2592 2593 /* Check that we have a certificate if we require one */ 2594 if ((algs & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN)) 2595 { 2596 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT); 2597 goto f_err; 2598 } 2599#ifndef OPENSSL_NO_DSA 2600 else if ((algs & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN)) 2601 { 2602 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT); 2603 goto f_err; 2604 } 2605#endif 2606#ifndef OPENSSL_NO_RSA 2607 if ((algs & SSL_kRSA) && 2608 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL))) 2609 { 2610 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT); 2611 goto f_err; 2612 } 2613#endif 2614#ifndef OPENSSL_NO_DH 2615 if ((algs & SSL_kEDH) && 2616 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL))) 2617 { 2618 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY); 2619 goto f_err; 2620 } 2621 else if ((algs & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA)) 2622 { 2623 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT); 2624 goto f_err; 2625 } 2626#ifndef OPENSSL_NO_DSA 2627 else if ((algs & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA)) 2628 { 2629 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT); 2630 goto f_err; 2631 } 2632#endif 2633#endif 2634 2635 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP)) 2636 { 2637#ifndef OPENSSL_NO_RSA 2638 if (algs & SSL_kRSA) 2639 { 2640 if (rsa == NULL 2641 || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) 2642 { 2643 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY); 2644 goto f_err; 2645 } 2646 } 2647 else 2648#endif 2649#ifndef OPENSSL_NO_DH 2650 if (algs & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) 2651 { 2652 if (dh == NULL 2653 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) 2654 { 2655 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY); 2656 goto f_err; 2657 } 2658 } 2659 else 2660#endif 2661 { 2662 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE); 2663 goto f_err; 2664 } 2665 } 2666 return(1); 2667f_err: 2668 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); 2669err: 2670 return(0); 2671 } 2672 2673 2674#ifndef OPENSSL_NO_ECDH 2675/* This is the complement of nid2curve_id in s3_srvr.c. */ 2676static int curve_id2nid(int curve_id) 2677{ 2678 /* ECC curves from draft-ietf-tls-ecc-01.txt (Mar 15, 2001) 2679 * (no changes in draft-ietf-tls-ecc-03.txt [June 2003]) */ 2680 static int nid_list[26] = 2681 { 2682 0, 2683 NID_sect163k1, /* sect163k1 (1) */ 2684 NID_sect163r1, /* sect163r1 (2) */ 2685 NID_sect163r2, /* sect163r2 (3) */ 2686 NID_sect193r1, /* sect193r1 (4) */ 2687 NID_sect193r2, /* sect193r2 (5) */ 2688 NID_sect233k1, /* sect233k1 (6) */ 2689 NID_sect233r1, /* sect233r1 (7) */ 2690 NID_sect239k1, /* sect239k1 (8) */ 2691 NID_sect283k1, /* sect283k1 (9) */ 2692 NID_sect283r1, /* sect283r1 (10) */ 2693 NID_sect409k1, /* sect409k1 (11) */ 2694 NID_sect409r1, /* sect409r1 (12) */ 2695 NID_sect571k1, /* sect571k1 (13) */ 2696 NID_sect571r1, /* sect571r1 (14) */ 2697 NID_secp160k1, /* secp160k1 (15) */ 2698 NID_secp160r1, /* secp160r1 (16) */ 2699 NID_secp160r2, /* secp160r2 (17) */ 2700 NID_secp192k1, /* secp192k1 (18) */ 2701 NID_X9_62_prime192v1, /* secp192r1 (19) */ 2702 NID_secp224k1, /* secp224k1 (20) */ 2703 NID_secp224r1, /* secp224r1 (21) */ 2704 NID_secp256k1, /* secp256k1 (22) */ 2705 NID_X9_62_prime256v1, /* secp256r1 (23) */ 2706 NID_secp384r1, /* secp384r1 (24) */ 2707 NID_secp521r1 /* secp521r1 (25) */ 2708 }; 2709 2710 if ((curve_id < 1) || (curve_id > 25)) return 0; 2711 2712 return nid_list[curve_id]; 2713} 2714#endif 2715 2716/* Check to see if handshake is full or resumed. Usually this is just a 2717 * case of checking to see if a cache hit has occurred. In the case of 2718 * session tickets we have to check the next message to be sure. 2719 */ 2720 2721#ifndef OPENSSL_NO_TLSEXT 2722int ssl3_check_finished(SSL *s) 2723 { 2724 int ok; 2725 long n; 2726 /* If we have no ticket or session ID is non-zero length (a match of 2727 * a non-zero session length would never reach here) it cannot be a 2728 * resumed session. 2729 */ 2730 if (!s->session->tlsext_tick || s->session->session_id_length) 2731 return 1; 2732 /* this function is called when we really expect a Certificate 2733 * message, so permit appropriate message length */ 2734 n=s->method->ssl_get_message(s, 2735 SSL3_ST_CR_CERT_A, 2736 SSL3_ST_CR_CERT_B, 2737 -1, 2738 s->max_cert_list, 2739 &ok); 2740 if (!ok) return((int)n); 2741 s->s3->tmp.reuse_message = 1; 2742 if ((s->s3->tmp.message_type == SSL3_MT_FINISHED) 2743 || (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET)) 2744 return 2; 2745 2746 return 1; 2747 } 2748#endif 2749 2750int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey) 2751 { 2752 int i = 0; 2753#ifndef OPENSSL_NO_ENGINE 2754 if (s->ctx->client_cert_engine) 2755 { 2756 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s, 2757 SSL_get_client_CA_list(s), 2758 px509, ppkey, NULL, NULL, NULL); 2759 if (i != 0) 2760 return i; 2761 } 2762#endif 2763 if (s->ctx->client_cert_cb) 2764 i = s->ctx->client_cert_cb(s,px509,ppkey); 2765 return i; 2766 } 2767