s3_clnt.c revision 120631
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) 1998-2002 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#include <stdio.h> 113#include "ssl_locl.h" 114#include "kssl_lcl.h" 115#include <openssl/buffer.h> 116#include <openssl/rand.h> 117#include <openssl/objects.h> 118#include <openssl/evp.h> 119#include <openssl/md5.h> 120#include "cryptlib.h" 121 122static SSL_METHOD *ssl3_get_client_method(int ver); 123static int ssl3_client_hello(SSL *s); 124static int ssl3_get_server_hello(SSL *s); 125static int ssl3_get_certificate_request(SSL *s); 126static int ca_dn_cmp(const X509_NAME * const *a,const X509_NAME * const *b); 127static int ssl3_get_server_done(SSL *s); 128static int ssl3_send_client_verify(SSL *s); 129static int ssl3_send_client_certificate(SSL *s); 130static int ssl3_send_client_key_exchange(SSL *s); 131static int ssl3_get_key_exchange(SSL *s); 132static int ssl3_get_server_certificate(SSL *s); 133static int ssl3_check_cert_and_algorithm(SSL *s); 134static SSL_METHOD *ssl3_get_client_method(int ver) 135 { 136 if (ver == SSL3_VERSION) 137 return(SSLv3_client_method()); 138 else 139 return(NULL); 140 } 141 142SSL_METHOD *SSLv3_client_method(void) 143 { 144 static int init=1; 145 static SSL_METHOD SSLv3_client_data; 146 147 if (init) 148 { 149 CRYPTO_w_lock(CRYPTO_LOCK_SSL_METHOD); 150 151 if (init) 152 { 153 memcpy((char *)&SSLv3_client_data,(char *)sslv3_base_method(), 154 sizeof(SSL_METHOD)); 155 SSLv3_client_data.ssl_connect=ssl3_connect; 156 SSLv3_client_data.get_ssl_method=ssl3_get_client_method; 157 init=0; 158 } 159 160 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_METHOD); 161 } 162 return(&SSLv3_client_data); 163 } 164 165int ssl3_connect(SSL *s) 166 { 167 BUF_MEM *buf=NULL; 168 unsigned long Time=time(NULL),l; 169 long num1; 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 /* Check if it is anon DH */ 274 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL)) 275 { 276 ret=ssl3_get_server_certificate(s); 277 if (ret <= 0) goto end; 278 } 279 else 280 skip=1; 281 s->state=SSL3_ST_CR_KEY_EXCH_A; 282 s->init_num=0; 283 break; 284 285 case SSL3_ST_CR_KEY_EXCH_A: 286 case SSL3_ST_CR_KEY_EXCH_B: 287 ret=ssl3_get_key_exchange(s); 288 if (ret <= 0) goto end; 289 s->state=SSL3_ST_CR_CERT_REQ_A; 290 s->init_num=0; 291 292 /* at this point we check that we have the 293 * required stuff from the server */ 294 if (!ssl3_check_cert_and_algorithm(s)) 295 { 296 ret= -1; 297 goto end; 298 } 299 break; 300 301 case SSL3_ST_CR_CERT_REQ_A: 302 case SSL3_ST_CR_CERT_REQ_B: 303 ret=ssl3_get_certificate_request(s); 304 if (ret <= 0) goto end; 305 s->state=SSL3_ST_CR_SRVR_DONE_A; 306 s->init_num=0; 307 break; 308 309 case SSL3_ST_CR_SRVR_DONE_A: 310 case SSL3_ST_CR_SRVR_DONE_B: 311 ret=ssl3_get_server_done(s); 312 if (ret <= 0) goto end; 313 if (s->s3->tmp.cert_req) 314 s->state=SSL3_ST_CW_CERT_A; 315 else 316 s->state=SSL3_ST_CW_KEY_EXCH_A; 317 s->init_num=0; 318 319 break; 320 321 case SSL3_ST_CW_CERT_A: 322 case SSL3_ST_CW_CERT_B: 323 case SSL3_ST_CW_CERT_C: 324 case SSL3_ST_CW_CERT_D: 325 ret=ssl3_send_client_certificate(s); 326 if (ret <= 0) goto end; 327 s->state=SSL3_ST_CW_KEY_EXCH_A; 328 s->init_num=0; 329 break; 330 331 case SSL3_ST_CW_KEY_EXCH_A: 332 case SSL3_ST_CW_KEY_EXCH_B: 333 ret=ssl3_send_client_key_exchange(s); 334 if (ret <= 0) goto end; 335 l=s->s3->tmp.new_cipher->algorithms; 336 /* EAY EAY EAY need to check for DH fix cert 337 * sent back */ 338 /* For TLS, cert_req is set to 2, so a cert chain 339 * of nothing is sent, but no verify packet is sent */ 340 if (s->s3->tmp.cert_req == 1) 341 { 342 s->state=SSL3_ST_CW_CERT_VRFY_A; 343 } 344 else 345 { 346 s->state=SSL3_ST_CW_CHANGE_A; 347 s->s3->change_cipher_spec=0; 348 } 349 350 s->init_num=0; 351 break; 352 353 case SSL3_ST_CW_CERT_VRFY_A: 354 case SSL3_ST_CW_CERT_VRFY_B: 355 ret=ssl3_send_client_verify(s); 356 if (ret <= 0) goto end; 357 s->state=SSL3_ST_CW_CHANGE_A; 358 s->init_num=0; 359 s->s3->change_cipher_spec=0; 360 break; 361 362 case SSL3_ST_CW_CHANGE_A: 363 case SSL3_ST_CW_CHANGE_B: 364 ret=ssl3_send_change_cipher_spec(s, 365 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B); 366 if (ret <= 0) goto end; 367 s->state=SSL3_ST_CW_FINISHED_A; 368 s->init_num=0; 369 370 s->session->cipher=s->s3->tmp.new_cipher; 371 if (s->s3->tmp.new_compression == NULL) 372 s->session->compress_meth=0; 373 else 374 s->session->compress_meth= 375 s->s3->tmp.new_compression->id; 376 if (!s->method->ssl3_enc->setup_key_block(s)) 377 { 378 ret= -1; 379 goto end; 380 } 381 382 if (!s->method->ssl3_enc->change_cipher_state(s, 383 SSL3_CHANGE_CIPHER_CLIENT_WRITE)) 384 { 385 ret= -1; 386 goto end; 387 } 388 389 break; 390 391 case SSL3_ST_CW_FINISHED_A: 392 case SSL3_ST_CW_FINISHED_B: 393 ret=ssl3_send_finished(s, 394 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B, 395 s->method->ssl3_enc->client_finished_label, 396 s->method->ssl3_enc->client_finished_label_len); 397 if (ret <= 0) goto end; 398 s->state=SSL3_ST_CW_FLUSH; 399 400 /* clear flags */ 401 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER; 402 if (s->hit) 403 { 404 s->s3->tmp.next_state=SSL_ST_OK; 405 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED) 406 { 407 s->state=SSL_ST_OK; 408 s->s3->flags|=SSL3_FLAGS_POP_BUFFER; 409 s->s3->delay_buf_pop_ret=0; 410 } 411 } 412 else 413 { 414 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A; 415 } 416 s->init_num=0; 417 break; 418 419 case SSL3_ST_CR_FINISHED_A: 420 case SSL3_ST_CR_FINISHED_B: 421 422 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A, 423 SSL3_ST_CR_FINISHED_B); 424 if (ret <= 0) goto end; 425 426 if (s->hit) 427 s->state=SSL3_ST_CW_CHANGE_A; 428 else 429 s->state=SSL_ST_OK; 430 s->init_num=0; 431 break; 432 433 case SSL3_ST_CW_FLUSH: 434 /* number of bytes to be flushed */ 435 num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL); 436 if (num1 > 0) 437 { 438 s->rwstate=SSL_WRITING; 439 num1=BIO_flush(s->wbio); 440 if (num1 <= 0) { ret= -1; goto end; } 441 s->rwstate=SSL_NOTHING; 442 } 443 444 s->state=s->s3->tmp.next_state; 445 break; 446 447 case SSL_ST_OK: 448 /* clean a few things up */ 449 ssl3_cleanup_key_block(s); 450 451 if (s->init_buf != NULL) 452 { 453 BUF_MEM_free(s->init_buf); 454 s->init_buf=NULL; 455 } 456 457 /* If we are not 'joining' the last two packets, 458 * remove the buffering now */ 459 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER)) 460 ssl_free_wbio_buffer(s); 461 /* else do it later in ssl3_write */ 462 463 s->init_num=0; 464 s->new_session=0; 465 466 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT); 467 if (s->hit) s->ctx->stats.sess_hit++; 468 469 ret=1; 470 /* s->server=0; */ 471 s->handshake_func=ssl3_connect; 472 s->ctx->stats.sess_connect_good++; 473 474 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1); 475 476 goto end; 477 /* break; */ 478 479 default: 480 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE); 481 ret= -1; 482 goto end; 483 /* break; */ 484 } 485 486 /* did we do anything */ 487 if (!s->s3->tmp.reuse_message && !skip) 488 { 489 if (s->debug) 490 { 491 if ((ret=BIO_flush(s->wbio)) <= 0) 492 goto end; 493 } 494 495 if ((cb != NULL) && (s->state != state)) 496 { 497 new_state=s->state; 498 s->state=state; 499 cb(s,SSL_CB_CONNECT_LOOP,1); 500 s->state=new_state; 501 } 502 } 503 skip=0; 504 } 505end: 506 s->in_handshake--; 507 if (buf != NULL) 508 BUF_MEM_free(buf); 509 if (cb != NULL) 510 cb(s,SSL_CB_CONNECT_EXIT,ret); 511 return(ret); 512 } 513 514 515static int ssl3_client_hello(SSL *s) 516 { 517 unsigned char *buf; 518 unsigned char *p,*d; 519 int i,j; 520 unsigned long Time,l; 521 SSL_COMP *comp; 522 523 buf=(unsigned char *)s->init_buf->data; 524 if (s->state == SSL3_ST_CW_CLNT_HELLO_A) 525 { 526 if ((s->session == NULL) || 527 (s->session->ssl_version != s->version) || 528 (s->session->not_resumable)) 529 { 530 if (!ssl_get_new_session(s,0)) 531 goto err; 532 } 533 /* else use the pre-loaded session */ 534 535 p=s->s3->client_random; 536 Time=time(NULL); /* Time */ 537 l2n(Time,p); 538 RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-sizeof(Time)); 539 540 /* Do the message type and length last */ 541 d=p= &(buf[4]); 542 543 *(p++)=s->version>>8; 544 *(p++)=s->version&0xff; 545 s->client_version=s->version; 546 547 /* Random stuff */ 548 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE); 549 p+=SSL3_RANDOM_SIZE; 550 551 /* Session ID */ 552 if (s->new_session) 553 i=0; 554 else 555 i=s->session->session_id_length; 556 *(p++)=i; 557 if (i != 0) 558 { 559 if (i > sizeof s->session->session_id) 560 { 561 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); 562 goto err; 563 } 564 memcpy(p,s->session->session_id,i); 565 p+=i; 566 } 567 568 /* Ciphers supported */ 569 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2])); 570 if (i == 0) 571 { 572 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE); 573 goto err; 574 } 575 s2n(i,p); 576 p+=i; 577 578 /* COMPRESSION */ 579 if (s->ctx->comp_methods == NULL) 580 j=0; 581 else 582 j=sk_SSL_COMP_num(s->ctx->comp_methods); 583 *(p++)=1+j; 584 for (i=0; i<j; i++) 585 { 586 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i); 587 *(p++)=comp->id; 588 } 589 *(p++)=0; /* Add the NULL method */ 590 591 l=(p-d); 592 d=buf; 593 *(d++)=SSL3_MT_CLIENT_HELLO; 594 l2n3(l,d); 595 596 s->state=SSL3_ST_CW_CLNT_HELLO_B; 597 /* number of bytes to write */ 598 s->init_num=p-buf; 599 s->init_off=0; 600 } 601 602 /* SSL3_ST_CW_CLNT_HELLO_B */ 603 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 604err: 605 return(-1); 606 } 607 608static int ssl3_get_server_hello(SSL *s) 609 { 610 STACK_OF(SSL_CIPHER) *sk; 611 SSL_CIPHER *c; 612 unsigned char *p,*d; 613 int i,al,ok; 614 unsigned int j; 615 long n; 616 SSL_COMP *comp; 617 618 n=ssl3_get_message(s, 619 SSL3_ST_CR_SRVR_HELLO_A, 620 SSL3_ST_CR_SRVR_HELLO_B, 621 SSL3_MT_SERVER_HELLO, 622 300, /* ?? */ 623 &ok); 624 625 if (!ok) return((int)n); 626 d=p=(unsigned char *)s->init_msg; 627 628 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff))) 629 { 630 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION); 631 s->version=(s->version&0xff00)|p[1]; 632 al=SSL_AD_PROTOCOL_VERSION; 633 goto f_err; 634 } 635 p+=2; 636 637 /* load the server hello data */ 638 /* load the server random */ 639 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE); 640 p+=SSL3_RANDOM_SIZE; 641 642 /* get the session-id */ 643 j= *(p++); 644 645 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE)) 646 { 647 al=SSL_AD_ILLEGAL_PARAMETER; 648 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG); 649 goto f_err; 650 } 651 652 if (j != 0 && j == s->session->session_id_length 653 && memcmp(p,s->session->session_id,j) == 0) 654 { 655 if(s->sid_ctx_length != s->session->sid_ctx_length 656 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length)) 657 { 658 /* actually a client application bug */ 659 al=SSL_AD_ILLEGAL_PARAMETER; 660 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); 661 goto f_err; 662 } 663 s->hit=1; 664 } 665 else /* a miss or crap from the other end */ 666 { 667 /* If we were trying for session-id reuse, make a new 668 * SSL_SESSION so we don't stuff up other people */ 669 s->hit=0; 670 if (s->session->session_id_length > 0) 671 { 672 if (!ssl_get_new_session(s,0)) 673 { 674 al=SSL_AD_INTERNAL_ERROR; 675 goto f_err; 676 } 677 } 678 s->session->session_id_length=j; 679 memcpy(s->session->session_id,p,j); /* j could be 0 */ 680 } 681 p+=j; 682 c=ssl_get_cipher_by_char(s,p); 683 if (c == NULL) 684 { 685 /* unknown cipher */ 686 al=SSL_AD_ILLEGAL_PARAMETER; 687 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED); 688 goto f_err; 689 } 690 p+=ssl_put_cipher_by_char(s,NULL,NULL); 691 692 sk=ssl_get_ciphers_by_id(s); 693 i=sk_SSL_CIPHER_find(sk,c); 694 if (i < 0) 695 { 696 /* we did not say we would use this cipher */ 697 al=SSL_AD_ILLEGAL_PARAMETER; 698 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED); 699 goto f_err; 700 } 701 702 /* Depending on the session caching (internal/external), the cipher 703 and/or cipher_id values may not be set. Make sure that 704 cipher_id is set and use it for comparison. */ 705 if (s->session->cipher) 706 s->session->cipher_id = s->session->cipher->id; 707 if (s->hit && (s->session->cipher_id != c->id)) 708 { 709 if (!(s->options & 710 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG)) 711 { 712 al=SSL_AD_ILLEGAL_PARAMETER; 713 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); 714 goto f_err; 715 } 716 } 717 s->s3->tmp.new_cipher=c; 718 719 /* lets get the compression algorithm */ 720 /* COMPRESSION */ 721 j= *(p++); 722 if (j == 0) 723 comp=NULL; 724 else 725 comp=ssl3_comp_find(s->ctx->comp_methods,j); 726 727 if ((j != 0) && (comp == NULL)) 728 { 729 al=SSL_AD_ILLEGAL_PARAMETER; 730 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); 731 goto f_err; 732 } 733 else 734 { 735 s->s3->tmp.new_compression=comp; 736 } 737 738 if (p != (d+n)) 739 { 740 /* wrong packet length */ 741 al=SSL_AD_DECODE_ERROR; 742 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH); 743 goto err; 744 } 745 746 return(1); 747f_err: 748 ssl3_send_alert(s,SSL3_AL_FATAL,al); 749err: 750 return(-1); 751 } 752 753static int ssl3_get_server_certificate(SSL *s) 754 { 755 int al,i,ok,ret= -1; 756 unsigned long n,nc,llen,l; 757 X509 *x=NULL; 758 unsigned char *p,*d,*q; 759 STACK_OF(X509) *sk=NULL; 760 SESS_CERT *sc; 761 EVP_PKEY *pkey=NULL; 762 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */ 763 764 n=ssl3_get_message(s, 765 SSL3_ST_CR_CERT_A, 766 SSL3_ST_CR_CERT_B, 767 -1, 768 s->max_cert_list, 769 &ok); 770 771 if (!ok) return((int)n); 772 773 if (s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) 774 { 775 s->s3->tmp.reuse_message=1; 776 return(1); 777 } 778 779 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE) 780 { 781 al=SSL_AD_UNEXPECTED_MESSAGE; 782 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE); 783 goto f_err; 784 } 785 d=p=(unsigned char *)s->init_msg; 786 787 if ((sk=sk_X509_new_null()) == NULL) 788 { 789 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE); 790 goto err; 791 } 792 793 n2l3(p,llen); 794 if (llen+3 != n) 795 { 796 al=SSL_AD_DECODE_ERROR; 797 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH); 798 goto f_err; 799 } 800 for (nc=0; nc<llen; ) 801 { 802 n2l3(p,l); 803 if ((l+nc+3) > llen) 804 { 805 al=SSL_AD_DECODE_ERROR; 806 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); 807 goto f_err; 808 } 809 810 q=p; 811 x=d2i_X509(NULL,&q,l); 812 if (x == NULL) 813 { 814 al=SSL_AD_BAD_CERTIFICATE; 815 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB); 816 goto f_err; 817 } 818 if (q != (p+l)) 819 { 820 al=SSL_AD_DECODE_ERROR; 821 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); 822 goto f_err; 823 } 824 if (!sk_X509_push(sk,x)) 825 { 826 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE); 827 goto err; 828 } 829 x=NULL; 830 nc+=l+3; 831 p=q; 832 } 833 834 i=ssl_verify_cert_chain(s,sk); 835 if ((s->verify_mode != SSL_VERIFY_NONE) && (!i) 836#ifndef OPENSSL_NO_KRB5 837 && (s->s3->tmp.new_cipher->algorithms & (SSL_MKEY_MASK|SSL_AUTH_MASK)) 838 != (SSL_aKRB5|SSL_kKRB5) 839#endif /* OPENSSL_NO_KRB5 */ 840 ) 841 { 842 al=ssl_verify_alarm_type(s->verify_result); 843 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED); 844 goto f_err; 845 } 846 ERR_clear_error(); /* but we keep s->verify_result */ 847 848 sc=ssl_sess_cert_new(); 849 if (sc == NULL) goto err; 850 851 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert); 852 s->session->sess_cert=sc; 853 854 sc->cert_chain=sk; 855 /* Inconsistency alert: cert_chain does include the peer's 856 * certificate, which we don't include in s3_srvr.c */ 857 x=sk_X509_value(sk,0); 858 sk=NULL; 859 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/ 860 861 pkey=X509_get_pubkey(x); 862 863 /* VRS: allow null cert if auth == KRB5 */ 864 need_cert = ((s->s3->tmp.new_cipher->algorithms 865 & (SSL_MKEY_MASK|SSL_AUTH_MASK)) 866 == (SSL_aKRB5|SSL_kKRB5))? 0: 1; 867 868#ifdef KSSL_DEBUG 869 printf("pkey,x = %p, %p\n", pkey,x); 870 printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey)); 871 printf("cipher, alg, nc = %s, %lx, %d\n", s->s3->tmp.new_cipher->name, 872 s->s3->tmp.new_cipher->algorithms, need_cert); 873#endif /* KSSL_DEBUG */ 874 875 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey))) 876 { 877 x=NULL; 878 al=SSL3_AL_FATAL; 879 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 880 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); 881 goto f_err; 882 } 883 884 i=ssl_cert_type(x,pkey); 885 if (need_cert && i < 0) 886 { 887 x=NULL; 888 al=SSL3_AL_FATAL; 889 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 890 SSL_R_UNKNOWN_CERTIFICATE_TYPE); 891 goto f_err; 892 } 893 894 if (need_cert) 895 { 896 sc->peer_cert_type=i; 897 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509); 898 /* Why would the following ever happen? 899 * We just created sc a couple of lines ago. */ 900 if (sc->peer_pkeys[i].x509 != NULL) 901 X509_free(sc->peer_pkeys[i].x509); 902 sc->peer_pkeys[i].x509=x; 903 sc->peer_key= &(sc->peer_pkeys[i]); 904 905 if (s->session->peer != NULL) 906 X509_free(s->session->peer); 907 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509); 908 s->session->peer=x; 909 } 910 else 911 { 912 sc->peer_cert_type=i; 913 sc->peer_key= NULL; 914 915 if (s->session->peer != NULL) 916 X509_free(s->session->peer); 917 s->session->peer=NULL; 918 } 919 s->session->verify_result = s->verify_result; 920 921 x=NULL; 922 ret=1; 923 924 if (0) 925 { 926f_err: 927 ssl3_send_alert(s,SSL3_AL_FATAL,al); 928 } 929err: 930 EVP_PKEY_free(pkey); 931 X509_free(x); 932 sk_X509_pop_free(sk,X509_free); 933 return(ret); 934 } 935 936static int ssl3_get_key_exchange(SSL *s) 937 { 938#ifndef OPENSSL_NO_RSA 939 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2]; 940#endif 941 EVP_MD_CTX md_ctx; 942 unsigned char *param,*p; 943 int al,i,j,param_len,ok; 944 long n,alg; 945 EVP_PKEY *pkey=NULL; 946#ifndef OPENSSL_NO_RSA 947 RSA *rsa=NULL; 948#endif 949#ifndef OPENSSL_NO_DH 950 DH *dh=NULL; 951#endif 952 953 /* use same message size as in ssl3_get_certificate_request() 954 * as ServerKeyExchange message may be skipped */ 955 n=ssl3_get_message(s, 956 SSL3_ST_CR_KEY_EXCH_A, 957 SSL3_ST_CR_KEY_EXCH_B, 958 -1, 959 s->max_cert_list, 960 &ok); 961 962 if (!ok) return((int)n); 963 964 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE) 965 { 966 s->s3->tmp.reuse_message=1; 967 return(1); 968 } 969 970 param=p=(unsigned char *)s->init_msg; 971 972 if (s->session->sess_cert != NULL) 973 { 974#ifndef OPENSSL_NO_RSA 975 if (s->session->sess_cert->peer_rsa_tmp != NULL) 976 { 977 RSA_free(s->session->sess_cert->peer_rsa_tmp); 978 s->session->sess_cert->peer_rsa_tmp=NULL; 979 } 980#endif 981#ifndef OPENSSL_NO_DH 982 if (s->session->sess_cert->peer_dh_tmp) 983 { 984 DH_free(s->session->sess_cert->peer_dh_tmp); 985 s->session->sess_cert->peer_dh_tmp=NULL; 986 } 987#endif 988 } 989 else 990 { 991 s->session->sess_cert=ssl_sess_cert_new(); 992 } 993 994 param_len=0; 995 alg=s->s3->tmp.new_cipher->algorithms; 996 EVP_MD_CTX_init(&md_ctx); 997 998#ifndef OPENSSL_NO_RSA 999 if (alg & SSL_kRSA) 1000 { 1001 if ((rsa=RSA_new()) == NULL) 1002 { 1003 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1004 goto err; 1005 } 1006 n2s(p,i); 1007 param_len=i+2; 1008 if (param_len > n) 1009 { 1010 al=SSL_AD_DECODE_ERROR; 1011 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH); 1012 goto f_err; 1013 } 1014 if (!(rsa->n=BN_bin2bn(p,i,rsa->n))) 1015 { 1016 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1017 goto err; 1018 } 1019 p+=i; 1020 1021 n2s(p,i); 1022 param_len+=i+2; 1023 if (param_len > n) 1024 { 1025 al=SSL_AD_DECODE_ERROR; 1026 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH); 1027 goto f_err; 1028 } 1029 if (!(rsa->e=BN_bin2bn(p,i,rsa->e))) 1030 { 1031 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1032 goto err; 1033 } 1034 p+=i; 1035 n-=param_len; 1036 1037 /* this should be because we are using an export cipher */ 1038 if (alg & SSL_aRSA) 1039 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1040 else 1041 { 1042 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1043 goto err; 1044 } 1045 s->session->sess_cert->peer_rsa_tmp=rsa; 1046 rsa=NULL; 1047 } 1048#else /* OPENSSL_NO_RSA */ 1049 if (0) 1050 ; 1051#endif 1052#ifndef OPENSSL_NO_DH 1053 else if (alg & SSL_kEDH) 1054 { 1055 if ((dh=DH_new()) == NULL) 1056 { 1057 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB); 1058 goto err; 1059 } 1060 n2s(p,i); 1061 param_len=i+2; 1062 if (param_len > n) 1063 { 1064 al=SSL_AD_DECODE_ERROR; 1065 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH); 1066 goto f_err; 1067 } 1068 if (!(dh->p=BN_bin2bn(p,i,NULL))) 1069 { 1070 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1071 goto err; 1072 } 1073 p+=i; 1074 1075 n2s(p,i); 1076 param_len+=i+2; 1077 if (param_len > n) 1078 { 1079 al=SSL_AD_DECODE_ERROR; 1080 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH); 1081 goto f_err; 1082 } 1083 if (!(dh->g=BN_bin2bn(p,i,NULL))) 1084 { 1085 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1086 goto err; 1087 } 1088 p+=i; 1089 1090 n2s(p,i); 1091 param_len+=i+2; 1092 if (param_len > n) 1093 { 1094 al=SSL_AD_DECODE_ERROR; 1095 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH); 1096 goto f_err; 1097 } 1098 if (!(dh->pub_key=BN_bin2bn(p,i,NULL))) 1099 { 1100 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1101 goto err; 1102 } 1103 p+=i; 1104 n-=param_len; 1105 1106#ifndef OPENSSL_NO_RSA 1107 if (alg & SSL_aRSA) 1108 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1109#else 1110 if (0) 1111 ; 1112#endif 1113#ifndef OPENSSL_NO_DSA 1114 else if (alg & SSL_aDSS) 1115 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509); 1116#endif 1117 /* else anonymous DH, so no certificate or pkey. */ 1118 1119 s->session->sess_cert->peer_dh_tmp=dh; 1120 dh=NULL; 1121 } 1122 else if ((alg & SSL_kDHr) || (alg & SSL_kDHd)) 1123 { 1124 al=SSL_AD_ILLEGAL_PARAMETER; 1125 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER); 1126 goto f_err; 1127 } 1128#endif /* !OPENSSL_NO_DH */ 1129 if (alg & SSL_aFZA) 1130 { 1131 al=SSL_AD_HANDSHAKE_FAILURE; 1132 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER); 1133 goto f_err; 1134 } 1135 1136 1137 /* p points to the next byte, there are 'n' bytes left */ 1138 1139 1140 /* if it was signed, check the signature */ 1141 if (pkey != NULL) 1142 { 1143 n2s(p,i); 1144 n-=2; 1145 j=EVP_PKEY_size(pkey); 1146 1147 if ((i != n) || (n > j) || (n <= 0)) 1148 { 1149 /* wrong packet length */ 1150 al=SSL_AD_DECODE_ERROR; 1151 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH); 1152 goto f_err; 1153 } 1154 1155#ifndef OPENSSL_NO_RSA 1156 if (pkey->type == EVP_PKEY_RSA) 1157 { 1158 int num; 1159 1160 j=0; 1161 q=md_buf; 1162 for (num=2; num > 0; num--) 1163 { 1164 EVP_DigestInit_ex(&md_ctx,(num == 2) 1165 ?s->ctx->md5:s->ctx->sha1, NULL); 1166 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); 1167 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); 1168 EVP_DigestUpdate(&md_ctx,param,param_len); 1169 EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i); 1170 q+=i; 1171 j+=i; 1172 } 1173 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n, 1174 pkey->pkey.rsa); 1175 if (i < 0) 1176 { 1177 al=SSL_AD_DECRYPT_ERROR; 1178 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT); 1179 goto f_err; 1180 } 1181 if (i == 0) 1182 { 1183 /* bad signature */ 1184 al=SSL_AD_DECRYPT_ERROR; 1185 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE); 1186 goto f_err; 1187 } 1188 } 1189 else 1190#endif 1191#ifndef OPENSSL_NO_DSA 1192 if (pkey->type == EVP_PKEY_DSA) 1193 { 1194 /* lets do DSS */ 1195 EVP_VerifyInit_ex(&md_ctx,EVP_dss1(), NULL); 1196 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); 1197 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); 1198 EVP_VerifyUpdate(&md_ctx,param,param_len); 1199 if (!EVP_VerifyFinal(&md_ctx,p,(int)n,pkey)) 1200 { 1201 /* bad signature */ 1202 al=SSL_AD_DECRYPT_ERROR; 1203 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE); 1204 goto f_err; 1205 } 1206 } 1207 else 1208#endif 1209 { 1210 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1211 goto err; 1212 } 1213 } 1214 else 1215 { 1216 /* still data left over */ 1217 if (!(alg & SSL_aNULL)) 1218 { 1219 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1220 goto err; 1221 } 1222 if (n != 0) 1223 { 1224 al=SSL_AD_DECODE_ERROR; 1225 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE); 1226 goto f_err; 1227 } 1228 } 1229 EVP_PKEY_free(pkey); 1230 EVP_MD_CTX_cleanup(&md_ctx); 1231 return(1); 1232f_err: 1233 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1234err: 1235 EVP_PKEY_free(pkey); 1236#ifndef OPENSSL_NO_RSA 1237 if (rsa != NULL) 1238 RSA_free(rsa); 1239#endif 1240#ifndef OPENSSL_NO_DH 1241 if (dh != NULL) 1242 DH_free(dh); 1243#endif 1244 EVP_MD_CTX_cleanup(&md_ctx); 1245 return(-1); 1246 } 1247 1248static int ssl3_get_certificate_request(SSL *s) 1249 { 1250 int ok,ret=0; 1251 unsigned long n,nc,l; 1252 unsigned int llen,ctype_num,i; 1253 X509_NAME *xn=NULL; 1254 unsigned char *p,*d,*q; 1255 STACK_OF(X509_NAME) *ca_sk=NULL; 1256 1257 n=ssl3_get_message(s, 1258 SSL3_ST_CR_CERT_REQ_A, 1259 SSL3_ST_CR_CERT_REQ_B, 1260 -1, 1261 s->max_cert_list, 1262 &ok); 1263 1264 if (!ok) return((int)n); 1265 1266 s->s3->tmp.cert_req=0; 1267 1268 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE) 1269 { 1270 s->s3->tmp.reuse_message=1; 1271 return(1); 1272 } 1273 1274 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST) 1275 { 1276 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 1277 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE); 1278 goto err; 1279 } 1280 1281 /* TLS does not like anon-DH with client cert */ 1282 if (s->version > SSL3_VERSION) 1283 { 1284 l=s->s3->tmp.new_cipher->algorithms; 1285 if (l & SSL_aNULL) 1286 { 1287 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 1288 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER); 1289 goto err; 1290 } 1291 } 1292 1293 d=p=(unsigned char *)s->init_msg; 1294 1295 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL) 1296 { 1297 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE); 1298 goto err; 1299 } 1300 1301 /* get the certificate types */ 1302 ctype_num= *(p++); 1303 if (ctype_num > SSL3_CT_NUMBER) 1304 ctype_num=SSL3_CT_NUMBER; 1305 for (i=0; i<ctype_num; i++) 1306 s->s3->tmp.ctype[i]= p[i]; 1307 p+=ctype_num; 1308 1309 /* get the CA RDNs */ 1310 n2s(p,llen); 1311#if 0 1312{ 1313FILE *out; 1314out=fopen("/tmp/vsign.der","w"); 1315fwrite(p,1,llen,out); 1316fclose(out); 1317} 1318#endif 1319 1320 if ((llen+ctype_num+2+1) != n) 1321 { 1322 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1323 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH); 1324 goto err; 1325 } 1326 1327 for (nc=0; nc<llen; ) 1328 { 1329 n2s(p,l); 1330 if ((l+nc+2) > llen) 1331 { 1332 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG)) 1333 goto cont; /* netscape bugs */ 1334 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1335 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG); 1336 goto err; 1337 } 1338 1339 q=p; 1340 1341 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL) 1342 { 1343 /* If netscape tolerance is on, ignore errors */ 1344 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG) 1345 goto cont; 1346 else 1347 { 1348 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1349 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB); 1350 goto err; 1351 } 1352 } 1353 1354 if (q != (p+l)) 1355 { 1356 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1357 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH); 1358 goto err; 1359 } 1360 if (!sk_X509_NAME_push(ca_sk,xn)) 1361 { 1362 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE); 1363 goto err; 1364 } 1365 1366 p+=l; 1367 nc+=l+2; 1368 } 1369 1370 if (0) 1371 { 1372cont: 1373 ERR_clear_error(); 1374 } 1375 1376 /* we should setup a certificate to return.... */ 1377 s->s3->tmp.cert_req=1; 1378 s->s3->tmp.ctype_num=ctype_num; 1379 if (s->s3->tmp.ca_names != NULL) 1380 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free); 1381 s->s3->tmp.ca_names=ca_sk; 1382 ca_sk=NULL; 1383 1384 ret=1; 1385err: 1386 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free); 1387 return(ret); 1388 } 1389 1390static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b) 1391 { 1392 return(X509_NAME_cmp(*a,*b)); 1393 } 1394 1395static int ssl3_get_server_done(SSL *s) 1396 { 1397 int ok,ret=0; 1398 long n; 1399 1400 n=ssl3_get_message(s, 1401 SSL3_ST_CR_SRVR_DONE_A, 1402 SSL3_ST_CR_SRVR_DONE_B, 1403 SSL3_MT_SERVER_DONE, 1404 30, /* should be very small, like 0 :-) */ 1405 &ok); 1406 1407 if (!ok) return((int)n); 1408 if (n > 0) 1409 { 1410 /* should contain no data */ 1411 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1412 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH); 1413 return -1; 1414 } 1415 ret=1; 1416 return(ret); 1417 } 1418 1419static int ssl3_send_client_key_exchange(SSL *s) 1420 { 1421 unsigned char *p,*d; 1422 int n; 1423 unsigned long l; 1424#ifndef OPENSSL_NO_RSA 1425 unsigned char *q; 1426 EVP_PKEY *pkey=NULL; 1427#endif 1428#ifndef OPENSSL_NO_KRB5 1429 KSSL_ERR kssl_err; 1430#endif /* OPENSSL_NO_KRB5 */ 1431 1432 if (s->state == SSL3_ST_CW_KEY_EXCH_A) 1433 { 1434 d=(unsigned char *)s->init_buf->data; 1435 p= &(d[4]); 1436 1437 l=s->s3->tmp.new_cipher->algorithms; 1438 1439 /* Fool emacs indentation */ 1440 if (0) {} 1441#ifndef OPENSSL_NO_RSA 1442 else if (l & SSL_kRSA) 1443 { 1444 RSA *rsa; 1445 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; 1446 1447 if (s->session->sess_cert->peer_rsa_tmp != NULL) 1448 rsa=s->session->sess_cert->peer_rsa_tmp; 1449 else 1450 { 1451 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1452 if ((pkey == NULL) || 1453 (pkey->type != EVP_PKEY_RSA) || 1454 (pkey->pkey.rsa == NULL)) 1455 { 1456 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1457 goto err; 1458 } 1459 rsa=pkey->pkey.rsa; 1460 EVP_PKEY_free(pkey); 1461 } 1462 1463 tmp_buf[0]=s->client_version>>8; 1464 tmp_buf[1]=s->client_version&0xff; 1465 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0) 1466 goto err; 1467 1468 s->session->master_key_length=sizeof tmp_buf; 1469 1470 q=p; 1471 /* Fix buf for TLS and beyond */ 1472 if (s->version > SSL3_VERSION) 1473 p+=2; 1474 n=RSA_public_encrypt(sizeof tmp_buf, 1475 tmp_buf,p,rsa,RSA_PKCS1_PADDING); 1476#ifdef PKCS1_CHECK 1477 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++; 1478 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70; 1479#endif 1480 if (n <= 0) 1481 { 1482 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT); 1483 goto err; 1484 } 1485 1486 /* Fix buf for TLS and beyond */ 1487 if (s->version > SSL3_VERSION) 1488 { 1489 s2n(n,q); 1490 n+=2; 1491 } 1492 1493 s->session->master_key_length= 1494 s->method->ssl3_enc->generate_master_secret(s, 1495 s->session->master_key, 1496 tmp_buf,sizeof tmp_buf); 1497 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf); 1498 } 1499#endif 1500#ifndef OPENSSL_NO_KRB5 1501 else if (l & SSL_kKRB5) 1502 { 1503 krb5_error_code krb5rc; 1504 KSSL_CTX *kssl_ctx = s->kssl_ctx; 1505 /* krb5_data krb5_ap_req; */ 1506 krb5_data *enc_ticket; 1507 krb5_data authenticator, *authp = NULL; 1508 EVP_CIPHER_CTX ciph_ctx; 1509 EVP_CIPHER *enc = NULL; 1510 unsigned char iv[EVP_MAX_IV_LENGTH]; 1511 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; 1512 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH 1513 + EVP_MAX_IV_LENGTH]; 1514 int padl, outl = sizeof(epms); 1515 1516 EVP_CIPHER_CTX_init(&ciph_ctx); 1517 1518#ifdef KSSL_DEBUG 1519 printf("ssl3_send_client_key_exchange(%lx & %lx)\n", 1520 l, SSL_kKRB5); 1521#endif /* KSSL_DEBUG */ 1522 1523 authp = NULL; 1524#ifdef KRB5SENDAUTH 1525 if (KRB5SENDAUTH) authp = &authenticator; 1526#endif /* KRB5SENDAUTH */ 1527 1528 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp, 1529 &kssl_err); 1530 enc = kssl_map_enc(kssl_ctx->enctype); 1531 if (enc == NULL) 1532 goto err; 1533#ifdef KSSL_DEBUG 1534 { 1535 printf("kssl_cget_tkt rtn %d\n", krb5rc); 1536 if (krb5rc && kssl_err.text) 1537 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text); 1538 } 1539#endif /* KSSL_DEBUG */ 1540 1541 if (krb5rc) 1542 { 1543 ssl3_send_alert(s,SSL3_AL_FATAL, 1544 SSL_AD_HANDSHAKE_FAILURE); 1545 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 1546 kssl_err.reason); 1547 goto err; 1548 } 1549 1550 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ 1551 ** in place of RFC 2712 KerberosWrapper, as in: 1552 ** 1553 ** Send ticket (copy to *p, set n = length) 1554 ** n = krb5_ap_req.length; 1555 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length); 1556 ** if (krb5_ap_req.data) 1557 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req); 1558 ** 1559 ** Now using real RFC 2712 KerberosWrapper 1560 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>) 1561 ** Note: 2712 "opaque" types are here replaced 1562 ** with a 2-byte length followed by the value. 1563 ** Example: 1564 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms 1565 ** Where "xx xx" = length bytes. Shown here with 1566 ** optional authenticator omitted. 1567 */ 1568 1569 /* KerberosWrapper.Ticket */ 1570 s2n(enc_ticket->length,p); 1571 memcpy(p, enc_ticket->data, enc_ticket->length); 1572 p+= enc_ticket->length; 1573 n = enc_ticket->length + 2; 1574 1575 /* KerberosWrapper.Authenticator */ 1576 if (authp && authp->length) 1577 { 1578 s2n(authp->length,p); 1579 memcpy(p, authp->data, authp->length); 1580 p+= authp->length; 1581 n+= authp->length + 2; 1582 1583 free(authp->data); 1584 authp->data = NULL; 1585 authp->length = 0; 1586 } 1587 else 1588 { 1589 s2n(0,p);/* null authenticator length */ 1590 n+=2; 1591 } 1592 1593 if (RAND_bytes(tmp_buf,sizeof tmp_buf) <= 0) 1594 goto err; 1595 1596 /* 20010420 VRS. Tried it this way; failed. 1597 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL); 1598 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx, 1599 ** kssl_ctx->length); 1600 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv); 1601 */ 1602 1603 memset(iv, 0, sizeof iv); /* per RFC 1510 */ 1604 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL, 1605 kssl_ctx->key,iv); 1606 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf, 1607 sizeof tmp_buf); 1608 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl); 1609 outl += padl; 1610 if (outl > sizeof epms) 1611 { 1612 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); 1613 goto err; 1614 } 1615 EVP_CIPHER_CTX_cleanup(&ciph_ctx); 1616 1617 /* KerberosWrapper.EncryptedPreMasterSecret */ 1618 s2n(outl,p); 1619 memcpy(p, epms, outl); 1620 p+=outl; 1621 n+=outl + 2; 1622 1623 s->session->master_key_length= 1624 s->method->ssl3_enc->generate_master_secret(s, 1625 s->session->master_key, 1626 tmp_buf, sizeof tmp_buf); 1627 1628 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf); 1629 OPENSSL_cleanse(epms, outl); 1630 } 1631#endif 1632#ifndef OPENSSL_NO_DH 1633 else if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) 1634 { 1635 DH *dh_srvr,*dh_clnt; 1636 1637 if (s->session->sess_cert->peer_dh_tmp != NULL) 1638 dh_srvr=s->session->sess_cert->peer_dh_tmp; 1639 else 1640 { 1641 /* we get them from the cert */ 1642 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); 1643 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS); 1644 goto err; 1645 } 1646 1647 /* generate a new random key */ 1648 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL) 1649 { 1650 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 1651 goto err; 1652 } 1653 if (!DH_generate_key(dh_clnt)) 1654 { 1655 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 1656 goto err; 1657 } 1658 1659 /* use the 'p' output buffer for the DH key, but 1660 * make sure to clear it out afterwards */ 1661 1662 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt); 1663 1664 if (n <= 0) 1665 { 1666 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 1667 goto err; 1668 } 1669 1670 /* generate master key from the result */ 1671 s->session->master_key_length= 1672 s->method->ssl3_enc->generate_master_secret(s, 1673 s->session->master_key,p,n); 1674 /* clean up */ 1675 memset(p,0,n); 1676 1677 /* send off the data */ 1678 n=BN_num_bytes(dh_clnt->pub_key); 1679 s2n(n,p); 1680 BN_bn2bin(dh_clnt->pub_key,p); 1681 n+=2; 1682 1683 DH_free(dh_clnt); 1684 1685 /* perhaps clean things up a bit EAY EAY EAY EAY*/ 1686 } 1687#endif 1688 else 1689 { 1690 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); 1691 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1692 goto err; 1693 } 1694 1695 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE; 1696 l2n3(n,d); 1697 1698 s->state=SSL3_ST_CW_KEY_EXCH_B; 1699 /* number of bytes to write */ 1700 s->init_num=n+4; 1701 s->init_off=0; 1702 } 1703 1704 /* SSL3_ST_CW_KEY_EXCH_B */ 1705 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 1706err: 1707 return(-1); 1708 } 1709 1710static int ssl3_send_client_verify(SSL *s) 1711 { 1712 unsigned char *p,*d; 1713 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH]; 1714 EVP_PKEY *pkey; 1715#ifndef OPENSSL_NO_RSA 1716 unsigned u=0; 1717#endif 1718 unsigned long n; 1719#ifndef OPENSSL_NO_DSA 1720 int j; 1721#endif 1722 1723 if (s->state == SSL3_ST_CW_CERT_VRFY_A) 1724 { 1725 d=(unsigned char *)s->init_buf->data; 1726 p= &(d[4]); 1727 pkey=s->cert->key->privatekey; 1728 1729 s->method->ssl3_enc->cert_verify_mac(s,&(s->s3->finish_dgst2), 1730 &(data[MD5_DIGEST_LENGTH])); 1731 1732#ifndef OPENSSL_NO_RSA 1733 if (pkey->type == EVP_PKEY_RSA) 1734 { 1735 s->method->ssl3_enc->cert_verify_mac(s, 1736 &(s->s3->finish_dgst1),&(data[0])); 1737 if (RSA_sign(NID_md5_sha1, data, 1738 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH, 1739 &(p[2]), &u, pkey->pkey.rsa) <= 0 ) 1740 { 1741 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB); 1742 goto err; 1743 } 1744 s2n(u,p); 1745 n=u+2; 1746 } 1747 else 1748#endif 1749#ifndef OPENSSL_NO_DSA 1750 if (pkey->type == EVP_PKEY_DSA) 1751 { 1752 if (!DSA_sign(pkey->save_type, 1753 &(data[MD5_DIGEST_LENGTH]), 1754 SHA_DIGEST_LENGTH,&(p[2]), 1755 (unsigned int *)&j,pkey->pkey.dsa)) 1756 { 1757 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB); 1758 goto err; 1759 } 1760 s2n(j,p); 1761 n=j+2; 1762 } 1763 else 1764#endif 1765 { 1766 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR); 1767 goto err; 1768 } 1769 *(d++)=SSL3_MT_CERTIFICATE_VERIFY; 1770 l2n3(n,d); 1771 1772 s->state=SSL3_ST_CW_CERT_VRFY_B; 1773 s->init_num=(int)n+4; 1774 s->init_off=0; 1775 } 1776 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 1777err: 1778 return(-1); 1779 } 1780 1781static int ssl3_send_client_certificate(SSL *s) 1782 { 1783 X509 *x509=NULL; 1784 EVP_PKEY *pkey=NULL; 1785 int i; 1786 unsigned long l; 1787 1788 if (s->state == SSL3_ST_CW_CERT_A) 1789 { 1790 if ((s->cert == NULL) || 1791 (s->cert->key->x509 == NULL) || 1792 (s->cert->key->privatekey == NULL)) 1793 s->state=SSL3_ST_CW_CERT_B; 1794 else 1795 s->state=SSL3_ST_CW_CERT_C; 1796 } 1797 1798 /* We need to get a client cert */ 1799 if (s->state == SSL3_ST_CW_CERT_B) 1800 { 1801 /* If we get an error, we need to 1802 * ssl->rwstate=SSL_X509_LOOKUP; return(-1); 1803 * We then get retied later */ 1804 i=0; 1805 if (s->ctx->client_cert_cb != NULL) 1806 i=s->ctx->client_cert_cb(s,&(x509),&(pkey)); 1807 if (i < 0) 1808 { 1809 s->rwstate=SSL_X509_LOOKUP; 1810 return(-1); 1811 } 1812 s->rwstate=SSL_NOTHING; 1813 if ((i == 1) && (pkey != NULL) && (x509 != NULL)) 1814 { 1815 s->state=SSL3_ST_CW_CERT_B; 1816 if ( !SSL_use_certificate(s,x509) || 1817 !SSL_use_PrivateKey(s,pkey)) 1818 i=0; 1819 } 1820 else if (i == 1) 1821 { 1822 i=0; 1823 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); 1824 } 1825 1826 if (x509 != NULL) X509_free(x509); 1827 if (pkey != NULL) EVP_PKEY_free(pkey); 1828 if (i == 0) 1829 { 1830 if (s->version == SSL3_VERSION) 1831 { 1832 s->s3->tmp.cert_req=0; 1833 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE); 1834 return(1); 1835 } 1836 else 1837 { 1838 s->s3->tmp.cert_req=2; 1839 } 1840 } 1841 1842 /* Ok, we have a cert */ 1843 s->state=SSL3_ST_CW_CERT_C; 1844 } 1845 1846 if (s->state == SSL3_ST_CW_CERT_C) 1847 { 1848 s->state=SSL3_ST_CW_CERT_D; 1849 l=ssl3_output_cert_chain(s, 1850 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509); 1851 s->init_num=(int)l; 1852 s->init_off=0; 1853 } 1854 /* SSL3_ST_CW_CERT_D */ 1855 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 1856 } 1857 1858#define has_bits(i,m) (((i)&(m)) == (m)) 1859 1860static int ssl3_check_cert_and_algorithm(SSL *s) 1861 { 1862 int i,idx; 1863 long algs; 1864 EVP_PKEY *pkey=NULL; 1865 SESS_CERT *sc; 1866#ifndef OPENSSL_NO_RSA 1867 RSA *rsa; 1868#endif 1869#ifndef OPENSSL_NO_DH 1870 DH *dh; 1871#endif 1872 1873 sc=s->session->sess_cert; 1874 1875 if (sc == NULL) 1876 { 1877 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR); 1878 goto err; 1879 } 1880 1881 algs=s->s3->tmp.new_cipher->algorithms; 1882 1883 /* we don't have a certificate */ 1884 if (algs & (SSL_aDH|SSL_aNULL|SSL_aKRB5)) 1885 return(1); 1886 1887#ifndef OPENSSL_NO_RSA 1888 rsa=s->session->sess_cert->peer_rsa_tmp; 1889#endif 1890#ifndef OPENSSL_NO_DH 1891 dh=s->session->sess_cert->peer_dh_tmp; 1892#endif 1893 1894 /* This is the passed certificate */ 1895 1896 idx=sc->peer_cert_type; 1897 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509); 1898 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey); 1899 EVP_PKEY_free(pkey); 1900 1901 1902 /* Check that we have a certificate if we require one */ 1903 if ((algs & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN)) 1904 { 1905 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT); 1906 goto f_err; 1907 } 1908#ifndef OPENSSL_NO_DSA 1909 else if ((algs & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN)) 1910 { 1911 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT); 1912 goto f_err; 1913 } 1914#endif 1915#ifndef OPENSSL_NO_RSA 1916 if ((algs & SSL_kRSA) && 1917 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL))) 1918 { 1919 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT); 1920 goto f_err; 1921 } 1922#endif 1923#ifndef OPENSSL_NO_DH 1924 if ((algs & SSL_kEDH) && 1925 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL))) 1926 { 1927 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY); 1928 goto f_err; 1929 } 1930 else if ((algs & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA)) 1931 { 1932 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT); 1933 goto f_err; 1934 } 1935#ifndef OPENSSL_NO_DSA 1936 else if ((algs & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA)) 1937 { 1938 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT); 1939 goto f_err; 1940 } 1941#endif 1942#endif 1943 1944 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP)) 1945 { 1946#ifndef OPENSSL_NO_RSA 1947 if (algs & SSL_kRSA) 1948 { 1949 if (rsa == NULL 1950 || RSA_size(rsa) > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) 1951 { 1952 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY); 1953 goto f_err; 1954 } 1955 } 1956 else 1957#endif 1958#ifndef OPENSSL_NO_DH 1959 if (algs & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) 1960 { 1961 if (dh == NULL 1962 || DH_size(dh) > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) 1963 { 1964 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY); 1965 goto f_err; 1966 } 1967 } 1968 else 1969#endif 1970 { 1971 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE); 1972 goto f_err; 1973 } 1974 } 1975 return(1); 1976f_err: 1977 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); 1978err: 1979 return(0); 1980 } 1981 1982