s3_clnt.c revision 142425
1272343Sngie/* ssl/s3_clnt.c */ 2272343Sngie/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3272343Sngie * All rights reserved. 4272343Sngie * 5272343Sngie * 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 <openssl/fips.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 if(RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-sizeof(Time)) <= 0) 539 goto err; 540 541 /* Do the message type and length last */ 542 d=p= &(buf[4]); 543 544 *(p++)=s->version>>8; 545 *(p++)=s->version&0xff; 546 s->client_version=s->version; 547 548 /* Random stuff */ 549 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE); 550 p+=SSL3_RANDOM_SIZE; 551 552 /* Session ID */ 553 if (s->new_session) 554 i=0; 555 else 556 i=s->session->session_id_length; 557 *(p++)=i; 558 if (i != 0) 559 { 560 if (i > sizeof s->session->session_id) 561 { 562 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); 563 goto err; 564 } 565 memcpy(p,s->session->session_id,i); 566 p+=i; 567 } 568 569 /* Ciphers supported */ 570 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2])); 571 if (i == 0) 572 { 573 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE); 574 goto err; 575 } 576 s2n(i,p); 577 p+=i; 578 579 /* COMPRESSION */ 580 if (s->ctx->comp_methods == NULL) 581 j=0; 582 else 583 j=sk_SSL_COMP_num(s->ctx->comp_methods); 584 *(p++)=1+j; 585 for (i=0; i<j; i++) 586 { 587 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i); 588 *(p++)=comp->id; 589 } 590 *(p++)=0; /* Add the NULL method */ 591 592 l=(p-d); 593 d=buf; 594 *(d++)=SSL3_MT_CLIENT_HELLO; 595 l2n3(l,d); 596 597 s->state=SSL3_ST_CW_CLNT_HELLO_B; 598 /* number of bytes to write */ 599 s->init_num=p-buf; 600 s->init_off=0; 601 } 602 603 /* SSL3_ST_CW_CLNT_HELLO_B */ 604 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 605err: 606 return(-1); 607 } 608 609static int ssl3_get_server_hello(SSL *s) 610 { 611 STACK_OF(SSL_CIPHER) *sk; 612 SSL_CIPHER *c; 613 unsigned char *p,*d; 614 int i,al,ok; 615 unsigned int j; 616 long n; 617 SSL_COMP *comp; 618 619 n=ssl3_get_message(s, 620 SSL3_ST_CR_SRVR_HELLO_A, 621 SSL3_ST_CR_SRVR_HELLO_B, 622 SSL3_MT_SERVER_HELLO, 623 300, /* ?? */ 624 &ok); 625 626 if (!ok) return((int)n); 627 d=p=(unsigned char *)s->init_msg; 628 629 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff))) 630 { 631 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION); 632 s->version=(s->version&0xff00)|p[1]; 633 al=SSL_AD_PROTOCOL_VERSION; 634 goto f_err; 635 } 636 p+=2; 637 638 /* load the server hello data */ 639 /* load the server random */ 640 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE); 641 p+=SSL3_RANDOM_SIZE; 642 643 /* get the session-id */ 644 j= *(p++); 645 646 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE)) 647 { 648 al=SSL_AD_ILLEGAL_PARAMETER; 649 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG); 650 goto f_err; 651 } 652 653 if (j != 0 && j == s->session->session_id_length 654 && memcmp(p,s->session->session_id,j) == 0) 655 { 656 if(s->sid_ctx_length != s->session->sid_ctx_length 657 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length)) 658 { 659 /* actually a client application bug */ 660 al=SSL_AD_ILLEGAL_PARAMETER; 661 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); 662 goto f_err; 663 } 664 s->hit=1; 665 } 666 else /* a miss or crap from the other end */ 667 { 668 /* If we were trying for session-id reuse, make a new 669 * SSL_SESSION so we don't stuff up other people */ 670 s->hit=0; 671 if (s->session->session_id_length > 0) 672 { 673 if (!ssl_get_new_session(s,0)) 674 { 675 al=SSL_AD_INTERNAL_ERROR; 676 goto f_err; 677 } 678 } 679 s->session->session_id_length=j; 680 memcpy(s->session->session_id,p,j); /* j could be 0 */ 681 } 682 p+=j; 683 c=ssl_get_cipher_by_char(s,p); 684 if (c == NULL) 685 { 686 /* unknown cipher */ 687 al=SSL_AD_ILLEGAL_PARAMETER; 688 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED); 689 goto f_err; 690 } 691 p+=ssl_put_cipher_by_char(s,NULL,NULL); 692 693 sk=ssl_get_ciphers_by_id(s); 694 i=sk_SSL_CIPHER_find(sk,c); 695 if (i < 0) 696 { 697 /* we did not say we would use this cipher */ 698 al=SSL_AD_ILLEGAL_PARAMETER; 699 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED); 700 goto f_err; 701 } 702 703 /* Depending on the session caching (internal/external), the cipher 704 and/or cipher_id values may not be set. Make sure that 705 cipher_id is set and use it for comparison. */ 706 if (s->session->cipher) 707 s->session->cipher_id = s->session->cipher->id; 708 if (s->hit && (s->session->cipher_id != c->id)) 709 { 710 if (!(s->options & 711 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG)) 712 { 713 al=SSL_AD_ILLEGAL_PARAMETER; 714 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); 715 goto f_err; 716 } 717 } 718 s->s3->tmp.new_cipher=c; 719 720 /* lets get the compression algorithm */ 721 /* COMPRESSION */ 722 j= *(p++); 723 if (j == 0) 724 comp=NULL; 725 else 726 comp=ssl3_comp_find(s->ctx->comp_methods,j); 727 728 if ((j != 0) && (comp == NULL)) 729 { 730 al=SSL_AD_ILLEGAL_PARAMETER; 731 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); 732 goto f_err; 733 } 734 else 735 { 736 s->s3->tmp.new_compression=comp; 737 } 738 739 if (p != (d+n)) 740 { 741 /* wrong packet length */ 742 al=SSL_AD_DECODE_ERROR; 743 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH); 744 goto err; 745 } 746 747 return(1); 748f_err: 749 ssl3_send_alert(s,SSL3_AL_FATAL,al); 750err: 751 return(-1); 752 } 753 754static int ssl3_get_server_certificate(SSL *s) 755 { 756 int al,i,ok,ret= -1; 757 unsigned long n,nc,llen,l; 758 X509 *x=NULL; 759 unsigned char *p,*d,*q; 760 STACK_OF(X509) *sk=NULL; 761 SESS_CERT *sc; 762 EVP_PKEY *pkey=NULL; 763 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */ 764 765 n=ssl3_get_message(s, 766 SSL3_ST_CR_CERT_A, 767 SSL3_ST_CR_CERT_B, 768 -1, 769 s->max_cert_list, 770 &ok); 771 772 if (!ok) return((int)n); 773 774 if (s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) 775 { 776 s->s3->tmp.reuse_message=1; 777 return(1); 778 } 779 780 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE) 781 { 782 al=SSL_AD_UNEXPECTED_MESSAGE; 783 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE); 784 goto f_err; 785 } 786 d=p=(unsigned char *)s->init_msg; 787 788 if ((sk=sk_X509_new_null()) == NULL) 789 { 790 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE); 791 goto err; 792 } 793 794 n2l3(p,llen); 795 if (llen+3 != n) 796 { 797 al=SSL_AD_DECODE_ERROR; 798 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH); 799 goto f_err; 800 } 801 for (nc=0; nc<llen; ) 802 { 803 n2l3(p,l); 804 if ((l+nc+3) > llen) 805 { 806 al=SSL_AD_DECODE_ERROR; 807 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); 808 goto f_err; 809 } 810 811 q=p; 812 x=d2i_X509(NULL,&q,l); 813 if (x == NULL) 814 { 815 al=SSL_AD_BAD_CERTIFICATE; 816 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB); 817 goto f_err; 818 } 819 if (q != (p+l)) 820 { 821 al=SSL_AD_DECODE_ERROR; 822 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); 823 goto f_err; 824 } 825 if (!sk_X509_push(sk,x)) 826 { 827 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE); 828 goto err; 829 } 830 x=NULL; 831 nc+=l+3; 832 p=q; 833 } 834 835 i=ssl_verify_cert_chain(s,sk); 836 if ((s->verify_mode != SSL_VERIFY_NONE) && (!i) 837#ifndef OPENSSL_NO_KRB5 838 && (s->s3->tmp.new_cipher->algorithms & (SSL_MKEY_MASK|SSL_AUTH_MASK)) 839 != (SSL_aKRB5|SSL_kKRB5) 840#endif /* OPENSSL_NO_KRB5 */ 841 ) 842 { 843 al=ssl_verify_alarm_type(s->verify_result); 844 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED); 845 goto f_err; 846 } 847 ERR_clear_error(); /* but we keep s->verify_result */ 848 849 sc=ssl_sess_cert_new(); 850 if (sc == NULL) goto err; 851 852 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert); 853 s->session->sess_cert=sc; 854 855 sc->cert_chain=sk; 856 /* Inconsistency alert: cert_chain does include the peer's 857 * certificate, which we don't include in s3_srvr.c */ 858 x=sk_X509_value(sk,0); 859 sk=NULL; 860 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/ 861 862 pkey=X509_get_pubkey(x); 863 864 /* VRS: allow null cert if auth == KRB5 */ 865 need_cert = ((s->s3->tmp.new_cipher->algorithms 866 & (SSL_MKEY_MASK|SSL_AUTH_MASK)) 867 == (SSL_aKRB5|SSL_kKRB5))? 0: 1; 868 869#ifdef KSSL_DEBUG 870 printf("pkey,x = %p, %p\n", pkey,x); 871 printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey)); 872 printf("cipher, alg, nc = %s, %lx, %d\n", s->s3->tmp.new_cipher->name, 873 s->s3->tmp.new_cipher->algorithms, need_cert); 874#endif /* KSSL_DEBUG */ 875 876 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey))) 877 { 878 x=NULL; 879 al=SSL3_AL_FATAL; 880 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 881 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); 882 goto f_err; 883 } 884 885 i=ssl_cert_type(x,pkey); 886 if (need_cert && i < 0) 887 { 888 x=NULL; 889 al=SSL3_AL_FATAL; 890 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 891 SSL_R_UNKNOWN_CERTIFICATE_TYPE); 892 goto f_err; 893 } 894 895 if (need_cert) 896 { 897 sc->peer_cert_type=i; 898 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509); 899 /* Why would the following ever happen? 900 * We just created sc a couple of lines ago. */ 901 if (sc->peer_pkeys[i].x509 != NULL) 902 X509_free(sc->peer_pkeys[i].x509); 903 sc->peer_pkeys[i].x509=x; 904 sc->peer_key= &(sc->peer_pkeys[i]); 905 906 if (s->session->peer != NULL) 907 X509_free(s->session->peer); 908 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509); 909 s->session->peer=x; 910 } 911 else 912 { 913 sc->peer_cert_type=i; 914 sc->peer_key= NULL; 915 916 if (s->session->peer != NULL) 917 X509_free(s->session->peer); 918 s->session->peer=NULL; 919 } 920 s->session->verify_result = s->verify_result; 921 922 x=NULL; 923 ret=1; 924 925 if (0) 926 { 927f_err: 928 ssl3_send_alert(s,SSL3_AL_FATAL,al); 929 } 930err: 931 EVP_PKEY_free(pkey); 932 X509_free(x); 933 sk_X509_pop_free(sk,X509_free); 934 return(ret); 935 } 936 937static int ssl3_get_key_exchange(SSL *s) 938 { 939#ifndef OPENSSL_NO_RSA 940 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2]; 941#endif 942 EVP_MD_CTX md_ctx; 943 unsigned char *param,*p; 944 int al,i,j,param_len,ok; 945 long n,alg; 946 EVP_PKEY *pkey=NULL; 947#ifndef OPENSSL_NO_RSA 948 RSA *rsa=NULL; 949#endif 950#ifndef OPENSSL_NO_DH 951 DH *dh=NULL; 952#endif 953 954 /* use same message size as in ssl3_get_certificate_request() 955 * as ServerKeyExchange message may be skipped */ 956 n=ssl3_get_message(s, 957 SSL3_ST_CR_KEY_EXCH_A, 958 SSL3_ST_CR_KEY_EXCH_B, 959 -1, 960 s->max_cert_list, 961 &ok); 962 963 if (!ok) return((int)n); 964 965 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE) 966 { 967 s->s3->tmp.reuse_message=1; 968 return(1); 969 } 970 971 param=p=(unsigned char *)s->init_msg; 972 973 if (s->session->sess_cert != NULL) 974 { 975#ifndef OPENSSL_NO_RSA 976 if (s->session->sess_cert->peer_rsa_tmp != NULL) 977 { 978 RSA_free(s->session->sess_cert->peer_rsa_tmp); 979 s->session->sess_cert->peer_rsa_tmp=NULL; 980 } 981#endif 982#ifndef OPENSSL_NO_DH 983 if (s->session->sess_cert->peer_dh_tmp) 984 { 985 DH_free(s->session->sess_cert->peer_dh_tmp); 986 s->session->sess_cert->peer_dh_tmp=NULL; 987 } 988#endif 989 } 990 else 991 { 992 s->session->sess_cert=ssl_sess_cert_new(); 993 } 994 995 param_len=0; 996 alg=s->s3->tmp.new_cipher->algorithms; 997 EVP_MD_CTX_init(&md_ctx); 998 999#ifndef OPENSSL_NO_RSA 1000 if (alg & SSL_kRSA) 1001 { 1002 if ((rsa=RSA_new()) == NULL) 1003 { 1004 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1005 goto err; 1006 } 1007 n2s(p,i); 1008 param_len=i+2; 1009 if (param_len > n) 1010 { 1011 al=SSL_AD_DECODE_ERROR; 1012 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH); 1013 goto f_err; 1014 } 1015 if (!(rsa->n=BN_bin2bn(p,i,rsa->n))) 1016 { 1017 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1018 goto err; 1019 } 1020 p+=i; 1021 1022 n2s(p,i); 1023 param_len+=i+2; 1024 if (param_len > n) 1025 { 1026 al=SSL_AD_DECODE_ERROR; 1027 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH); 1028 goto f_err; 1029 } 1030 if (!(rsa->e=BN_bin2bn(p,i,rsa->e))) 1031 { 1032 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1033 goto err; 1034 } 1035 p+=i; 1036 n-=param_len; 1037 1038 /* this should be because we are using an export cipher */ 1039 if (alg & SSL_aRSA) 1040 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1041 else 1042 { 1043 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1044 goto err; 1045 } 1046 s->session->sess_cert->peer_rsa_tmp=rsa; 1047 rsa=NULL; 1048 } 1049#else /* OPENSSL_NO_RSA */ 1050 if (0) 1051 ; 1052#endif 1053#ifndef OPENSSL_NO_DH 1054 else if (alg & SSL_kEDH) 1055 { 1056 if ((dh=DH_new()) == NULL) 1057 { 1058 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB); 1059 goto err; 1060 } 1061 n2s(p,i); 1062 param_len=i+2; 1063 if (param_len > n) 1064 { 1065 al=SSL_AD_DECODE_ERROR; 1066 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH); 1067 goto f_err; 1068 } 1069 if (!(dh->p=BN_bin2bn(p,i,NULL))) 1070 { 1071 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1072 goto err; 1073 } 1074 p+=i; 1075 1076 n2s(p,i); 1077 param_len+=i+2; 1078 if (param_len > n) 1079 { 1080 al=SSL_AD_DECODE_ERROR; 1081 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH); 1082 goto f_err; 1083 } 1084 if (!(dh->g=BN_bin2bn(p,i,NULL))) 1085 { 1086 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1087 goto err; 1088 } 1089 p+=i; 1090 1091 n2s(p,i); 1092 param_len+=i+2; 1093 if (param_len > n) 1094 { 1095 al=SSL_AD_DECODE_ERROR; 1096 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH); 1097 goto f_err; 1098 } 1099 if (!(dh->pub_key=BN_bin2bn(p,i,NULL))) 1100 { 1101 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1102 goto err; 1103 } 1104 p+=i; 1105 n-=param_len; 1106 1107#ifndef OPENSSL_NO_RSA 1108 if (alg & SSL_aRSA) 1109 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1110#else 1111 if (0) 1112 ; 1113#endif 1114#ifndef OPENSSL_NO_DSA 1115 else if (alg & SSL_aDSS) 1116 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509); 1117#endif 1118 /* else anonymous DH, so no certificate or pkey. */ 1119 1120 s->session->sess_cert->peer_dh_tmp=dh; 1121 dh=NULL; 1122 } 1123 else if ((alg & SSL_kDHr) || (alg & SSL_kDHd)) 1124 { 1125 al=SSL_AD_ILLEGAL_PARAMETER; 1126 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER); 1127 goto f_err; 1128 } 1129#endif /* !OPENSSL_NO_DH */ 1130 if (alg & SSL_aFZA) 1131 { 1132 al=SSL_AD_HANDSHAKE_FAILURE; 1133 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER); 1134 goto f_err; 1135 } 1136 1137 1138 /* p points to the next byte, there are 'n' bytes left */ 1139 1140 1141 /* if it was signed, check the signature */ 1142 if (pkey != NULL) 1143 { 1144 n2s(p,i); 1145 n-=2; 1146 j=EVP_PKEY_size(pkey); 1147 1148 if ((i != n) || (n > j) || (n <= 0)) 1149 { 1150 /* wrong packet length */ 1151 al=SSL_AD_DECODE_ERROR; 1152 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH); 1153 goto f_err; 1154 } 1155 1156#ifndef OPENSSL_NO_RSA 1157 if (pkey->type == EVP_PKEY_RSA) 1158 { 1159 int num; 1160 1161 j=0; 1162 q=md_buf; 1163 for (num=2; num > 0; num--) 1164 { 1165 EVP_DigestInit_ex(&md_ctx,(num == 2) 1166 ?s->ctx->md5:s->ctx->sha1, NULL); 1167 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); 1168 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); 1169 EVP_DigestUpdate(&md_ctx,param,param_len); 1170#ifdef OPENSSL_FIPS 1171 if(s->version == TLS1_VERSION && num == 2) 1172 FIPS_allow_md5(1); 1173#endif 1174 1175 EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i); 1176#ifdef OPENSSL_FIPS 1177 if(s->version == TLS1_VERSION && num == 2) 1178 FIPS_allow_md5(1); 1179#endif 1180 q+=i; 1181 j+=i; 1182 } 1183 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n, 1184 pkey->pkey.rsa); 1185 if (i < 0) 1186 { 1187 al=SSL_AD_DECRYPT_ERROR; 1188 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT); 1189 goto f_err; 1190 } 1191 if (i == 0) 1192 { 1193 /* bad signature */ 1194 al=SSL_AD_DECRYPT_ERROR; 1195 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE); 1196 goto f_err; 1197 } 1198 } 1199 else 1200#endif 1201#ifndef OPENSSL_NO_DSA 1202 if (pkey->type == EVP_PKEY_DSA) 1203 { 1204 /* lets do DSS */ 1205 EVP_VerifyInit_ex(&md_ctx,EVP_dss1(), NULL); 1206 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); 1207 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); 1208 EVP_VerifyUpdate(&md_ctx,param,param_len); 1209 if (!EVP_VerifyFinal(&md_ctx,p,(int)n,pkey)) 1210 { 1211 /* bad signature */ 1212 al=SSL_AD_DECRYPT_ERROR; 1213 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE); 1214 goto f_err; 1215 } 1216 } 1217 else 1218#endif 1219 { 1220 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1221 goto err; 1222 } 1223 } 1224 else 1225 { 1226 /* still data left over */ 1227 if (!(alg & SSL_aNULL)) 1228 { 1229 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1230 goto err; 1231 } 1232 if (n != 0) 1233 { 1234 al=SSL_AD_DECODE_ERROR; 1235 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE); 1236 goto f_err; 1237 } 1238 } 1239 EVP_PKEY_free(pkey); 1240 EVP_MD_CTX_cleanup(&md_ctx); 1241 return(1); 1242f_err: 1243 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1244err: 1245 EVP_PKEY_free(pkey); 1246#ifndef OPENSSL_NO_RSA 1247 if (rsa != NULL) 1248 RSA_free(rsa); 1249#endif 1250#ifndef OPENSSL_NO_DH 1251 if (dh != NULL) 1252 DH_free(dh); 1253#endif 1254 EVP_MD_CTX_cleanup(&md_ctx); 1255 return(-1); 1256 } 1257 1258static int ssl3_get_certificate_request(SSL *s) 1259 { 1260 int ok,ret=0; 1261 unsigned long n,nc,l; 1262 unsigned int llen,ctype_num,i; 1263 X509_NAME *xn=NULL; 1264 unsigned char *p,*d,*q; 1265 STACK_OF(X509_NAME) *ca_sk=NULL; 1266 1267 n=ssl3_get_message(s, 1268 SSL3_ST_CR_CERT_REQ_A, 1269 SSL3_ST_CR_CERT_REQ_B, 1270 -1, 1271 s->max_cert_list, 1272 &ok); 1273 1274 if (!ok) return((int)n); 1275 1276 s->s3->tmp.cert_req=0; 1277 1278 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE) 1279 { 1280 s->s3->tmp.reuse_message=1; 1281 return(1); 1282 } 1283 1284 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST) 1285 { 1286 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 1287 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE); 1288 goto err; 1289 } 1290 1291 /* TLS does not like anon-DH with client cert */ 1292 if (s->version > SSL3_VERSION) 1293 { 1294 l=s->s3->tmp.new_cipher->algorithms; 1295 if (l & SSL_aNULL) 1296 { 1297 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 1298 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER); 1299 goto err; 1300 } 1301 } 1302 1303 d=p=(unsigned char *)s->init_msg; 1304 1305 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL) 1306 { 1307 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE); 1308 goto err; 1309 } 1310 1311 /* get the certificate types */ 1312 ctype_num= *(p++); 1313 if (ctype_num > SSL3_CT_NUMBER) 1314 ctype_num=SSL3_CT_NUMBER; 1315 for (i=0; i<ctype_num; i++) 1316 s->s3->tmp.ctype[i]= p[i]; 1317 p+=ctype_num; 1318 1319 /* get the CA RDNs */ 1320 n2s(p,llen); 1321#if 0 1322{ 1323FILE *out; 1324out=fopen("/tmp/vsign.der","w"); 1325fwrite(p,1,llen,out); 1326fclose(out); 1327} 1328#endif 1329 1330 if ((llen+ctype_num+2+1) != n) 1331 { 1332 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1333 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH); 1334 goto err; 1335 } 1336 1337 for (nc=0; nc<llen; ) 1338 { 1339 n2s(p,l); 1340 if ((l+nc+2) > llen) 1341 { 1342 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG)) 1343 goto cont; /* netscape bugs */ 1344 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1345 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG); 1346 goto err; 1347 } 1348 1349 q=p; 1350 1351 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL) 1352 { 1353 /* If netscape tolerance is on, ignore errors */ 1354 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG) 1355 goto cont; 1356 else 1357 { 1358 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1359 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB); 1360 goto err; 1361 } 1362 } 1363 1364 if (q != (p+l)) 1365 { 1366 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1367 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH); 1368 goto err; 1369 } 1370 if (!sk_X509_NAME_push(ca_sk,xn)) 1371 { 1372 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE); 1373 goto err; 1374 } 1375 1376 p+=l; 1377 nc+=l+2; 1378 } 1379 1380 if (0) 1381 { 1382cont: 1383 ERR_clear_error(); 1384 } 1385 1386 /* we should setup a certificate to return.... */ 1387 s->s3->tmp.cert_req=1; 1388 s->s3->tmp.ctype_num=ctype_num; 1389 if (s->s3->tmp.ca_names != NULL) 1390 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free); 1391 s->s3->tmp.ca_names=ca_sk; 1392 ca_sk=NULL; 1393 1394 ret=1; 1395err: 1396 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free); 1397 return(ret); 1398 } 1399 1400static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b) 1401 { 1402 return(X509_NAME_cmp(*a,*b)); 1403 } 1404 1405static int ssl3_get_server_done(SSL *s) 1406 { 1407 int ok,ret=0; 1408 long n; 1409 1410 n=ssl3_get_message(s, 1411 SSL3_ST_CR_SRVR_DONE_A, 1412 SSL3_ST_CR_SRVR_DONE_B, 1413 SSL3_MT_SERVER_DONE, 1414 30, /* should be very small, like 0 :-) */ 1415 &ok); 1416 1417 if (!ok) return((int)n); 1418 if (n > 0) 1419 { 1420 /* should contain no data */ 1421 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1422 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH); 1423 return -1; 1424 } 1425 ret=1; 1426 return(ret); 1427 } 1428 1429static int ssl3_send_client_key_exchange(SSL *s) 1430 { 1431 unsigned char *p,*d; 1432 int n; 1433 unsigned long l; 1434#ifndef OPENSSL_NO_RSA 1435 unsigned char *q; 1436 EVP_PKEY *pkey=NULL; 1437#endif 1438#ifndef OPENSSL_NO_KRB5 1439 KSSL_ERR kssl_err; 1440#endif /* OPENSSL_NO_KRB5 */ 1441 1442 if (s->state == SSL3_ST_CW_KEY_EXCH_A) 1443 { 1444 d=(unsigned char *)s->init_buf->data; 1445 p= &(d[4]); 1446 1447 l=s->s3->tmp.new_cipher->algorithms; 1448 1449 /* Fool emacs indentation */ 1450 if (0) {} 1451#ifndef OPENSSL_NO_RSA 1452 else if (l & SSL_kRSA) 1453 { 1454 RSA *rsa; 1455 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; 1456 1457 if (s->session->sess_cert->peer_rsa_tmp != NULL) 1458 rsa=s->session->sess_cert->peer_rsa_tmp; 1459 else 1460 { 1461 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1462 if ((pkey == NULL) || 1463 (pkey->type != EVP_PKEY_RSA) || 1464 (pkey->pkey.rsa == NULL)) 1465 { 1466 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1467 goto err; 1468 } 1469 rsa=pkey->pkey.rsa; 1470 EVP_PKEY_free(pkey); 1471 } 1472 1473 tmp_buf[0]=s->client_version>>8; 1474 tmp_buf[1]=s->client_version&0xff; 1475 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0) 1476 goto err; 1477 1478 s->session->master_key_length=sizeof tmp_buf; 1479 1480 q=p; 1481 /* Fix buf for TLS and beyond */ 1482 if (s->version > SSL3_VERSION) 1483 p+=2; 1484 n=RSA_public_encrypt(sizeof tmp_buf, 1485 tmp_buf,p,rsa,RSA_PKCS1_PADDING); 1486#ifdef PKCS1_CHECK 1487 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++; 1488 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70; 1489#endif 1490 if (n <= 0) 1491 { 1492 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT); 1493 goto err; 1494 } 1495 1496 /* Fix buf for TLS and beyond */ 1497 if (s->version > SSL3_VERSION) 1498 { 1499 s2n(n,q); 1500 n+=2; 1501 } 1502 1503 s->session->master_key_length= 1504 s->method->ssl3_enc->generate_master_secret(s, 1505 s->session->master_key, 1506 tmp_buf,sizeof tmp_buf); 1507 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf); 1508 } 1509#endif 1510#ifndef OPENSSL_NO_KRB5 1511 else if (l & SSL_kKRB5) 1512 { 1513 krb5_error_code krb5rc; 1514 KSSL_CTX *kssl_ctx = s->kssl_ctx; 1515 /* krb5_data krb5_ap_req; */ 1516 krb5_data *enc_ticket; 1517 krb5_data authenticator, *authp = NULL; 1518 EVP_CIPHER_CTX ciph_ctx; 1519 EVP_CIPHER *enc = NULL; 1520 unsigned char iv[EVP_MAX_IV_LENGTH]; 1521 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; 1522 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH 1523 + EVP_MAX_IV_LENGTH]; 1524 int padl, outl = sizeof(epms); 1525 1526 EVP_CIPHER_CTX_init(&ciph_ctx); 1527 1528#ifdef KSSL_DEBUG 1529 printf("ssl3_send_client_key_exchange(%lx & %lx)\n", 1530 l, SSL_kKRB5); 1531#endif /* KSSL_DEBUG */ 1532 1533 authp = NULL; 1534#ifdef KRB5SENDAUTH 1535 if (KRB5SENDAUTH) authp = &authenticator; 1536#endif /* KRB5SENDAUTH */ 1537 1538 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp, 1539 &kssl_err); 1540 enc = kssl_map_enc(kssl_ctx->enctype); 1541 if (enc == NULL) 1542 goto err; 1543#ifdef KSSL_DEBUG 1544 { 1545 printf("kssl_cget_tkt rtn %d\n", krb5rc); 1546 if (krb5rc && kssl_err.text) 1547 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text); 1548 } 1549#endif /* KSSL_DEBUG */ 1550 1551 if (krb5rc) 1552 { 1553 ssl3_send_alert(s,SSL3_AL_FATAL, 1554 SSL_AD_HANDSHAKE_FAILURE); 1555 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 1556 kssl_err.reason); 1557 goto err; 1558 } 1559 1560 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ 1561 ** in place of RFC 2712 KerberosWrapper, as in: 1562 ** 1563 ** Send ticket (copy to *p, set n = length) 1564 ** n = krb5_ap_req.length; 1565 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length); 1566 ** if (krb5_ap_req.data) 1567 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req); 1568 ** 1569 ** Now using real RFC 2712 KerberosWrapper 1570 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>) 1571 ** Note: 2712 "opaque" types are here replaced 1572 ** with a 2-byte length followed by the value. 1573 ** Example: 1574 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms 1575 ** Where "xx xx" = length bytes. Shown here with 1576 ** optional authenticator omitted. 1577 */ 1578 1579 /* KerberosWrapper.Ticket */ 1580 s2n(enc_ticket->length,p); 1581 memcpy(p, enc_ticket->data, enc_ticket->length); 1582 p+= enc_ticket->length; 1583 n = enc_ticket->length + 2; 1584 1585 /* KerberosWrapper.Authenticator */ 1586 if (authp && authp->length) 1587 { 1588 s2n(authp->length,p); 1589 memcpy(p, authp->data, authp->length); 1590 p+= authp->length; 1591 n+= authp->length + 2; 1592 1593 free(authp->data); 1594 authp->data = NULL; 1595 authp->length = 0; 1596 } 1597 else 1598 { 1599 s2n(0,p);/* null authenticator length */ 1600 n+=2; 1601 } 1602 1603 if (RAND_bytes(tmp_buf,sizeof tmp_buf) <= 0) 1604 goto err; 1605 1606 /* 20010420 VRS. Tried it this way; failed. 1607 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL); 1608 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx, 1609 ** kssl_ctx->length); 1610 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv); 1611 */ 1612 1613 memset(iv, 0, sizeof iv); /* per RFC 1510 */ 1614 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL, 1615 kssl_ctx->key,iv); 1616 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf, 1617 sizeof tmp_buf); 1618 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl); 1619 outl += padl; 1620 if (outl > sizeof epms) 1621 { 1622 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); 1623 goto err; 1624 } 1625 EVP_CIPHER_CTX_cleanup(&ciph_ctx); 1626 1627 /* KerberosWrapper.EncryptedPreMasterSecret */ 1628 s2n(outl,p); 1629 memcpy(p, epms, outl); 1630 p+=outl; 1631 n+=outl + 2; 1632 1633 s->session->master_key_length= 1634 s->method->ssl3_enc->generate_master_secret(s, 1635 s->session->master_key, 1636 tmp_buf, sizeof tmp_buf); 1637 1638 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf); 1639 OPENSSL_cleanse(epms, outl); 1640 } 1641#endif 1642#ifndef OPENSSL_NO_DH 1643 else if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) 1644 { 1645 DH *dh_srvr,*dh_clnt; 1646 1647 if (s->session->sess_cert->peer_dh_tmp != NULL) 1648 dh_srvr=s->session->sess_cert->peer_dh_tmp; 1649 else 1650 { 1651 /* we get them from the cert */ 1652 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); 1653 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS); 1654 goto err; 1655 } 1656 1657 /* generate a new random key */ 1658 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL) 1659 { 1660 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 1661 goto err; 1662 } 1663 if (!DH_generate_key(dh_clnt)) 1664 { 1665 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 1666 goto err; 1667 } 1668 1669 /* use the 'p' output buffer for the DH key, but 1670 * make sure to clear it out afterwards */ 1671 1672 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt); 1673 1674 if (n <= 0) 1675 { 1676 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 1677 goto err; 1678 } 1679 1680 /* generate master key from the result */ 1681 s->session->master_key_length= 1682 s->method->ssl3_enc->generate_master_secret(s, 1683 s->session->master_key,p,n); 1684 /* clean up */ 1685 memset(p,0,n); 1686 1687 /* send off the data */ 1688 n=BN_num_bytes(dh_clnt->pub_key); 1689 s2n(n,p); 1690 BN_bn2bin(dh_clnt->pub_key,p); 1691 n+=2; 1692 1693 DH_free(dh_clnt); 1694 1695 /* perhaps clean things up a bit EAY EAY EAY EAY*/ 1696 } 1697#endif 1698 else 1699 { 1700 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); 1701 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1702 goto err; 1703 } 1704 1705 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE; 1706 l2n3(n,d); 1707 1708 s->state=SSL3_ST_CW_KEY_EXCH_B; 1709 /* number of bytes to write */ 1710 s->init_num=n+4; 1711 s->init_off=0; 1712 } 1713 1714 /* SSL3_ST_CW_KEY_EXCH_B */ 1715 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 1716err: 1717 return(-1); 1718 } 1719 1720static int ssl3_send_client_verify(SSL *s) 1721 { 1722 unsigned char *p,*d; 1723 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH]; 1724 EVP_PKEY *pkey; 1725#ifndef OPENSSL_NO_RSA 1726 unsigned u=0; 1727#endif 1728 unsigned long n; 1729#ifndef OPENSSL_NO_DSA 1730 int j; 1731#endif 1732 1733 if (s->state == SSL3_ST_CW_CERT_VRFY_A) 1734 { 1735 d=(unsigned char *)s->init_buf->data; 1736 p= &(d[4]); 1737 pkey=s->cert->key->privatekey; 1738 1739 s->method->ssl3_enc->cert_verify_mac(s,&(s->s3->finish_dgst2), 1740 &(data[MD5_DIGEST_LENGTH])); 1741 1742#ifndef OPENSSL_NO_RSA 1743 if (pkey->type == EVP_PKEY_RSA) 1744 { 1745 s->method->ssl3_enc->cert_verify_mac(s, 1746 &(s->s3->finish_dgst1),&(data[0])); 1747 if (RSA_sign(NID_md5_sha1, data, 1748 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH, 1749 &(p[2]), &u, pkey->pkey.rsa) <= 0 ) 1750 { 1751 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB); 1752 goto err; 1753 } 1754 s2n(u,p); 1755 n=u+2; 1756 } 1757 else 1758#endif 1759#ifndef OPENSSL_NO_DSA 1760 if (pkey->type == EVP_PKEY_DSA) 1761 { 1762 if (!DSA_sign(pkey->save_type, 1763 &(data[MD5_DIGEST_LENGTH]), 1764 SHA_DIGEST_LENGTH,&(p[2]), 1765 (unsigned int *)&j,pkey->pkey.dsa)) 1766 { 1767 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB); 1768 goto err; 1769 } 1770 s2n(j,p); 1771 n=j+2; 1772 } 1773 else 1774#endif 1775 { 1776 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR); 1777 goto err; 1778 } 1779 *(d++)=SSL3_MT_CERTIFICATE_VERIFY; 1780 l2n3(n,d); 1781 1782 s->state=SSL3_ST_CW_CERT_VRFY_B; 1783 s->init_num=(int)n+4; 1784 s->init_off=0; 1785 } 1786 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 1787err: 1788 return(-1); 1789 } 1790 1791static int ssl3_send_client_certificate(SSL *s) 1792 { 1793 X509 *x509=NULL; 1794 EVP_PKEY *pkey=NULL; 1795 int i; 1796 unsigned long l; 1797 1798 if (s->state == SSL3_ST_CW_CERT_A) 1799 { 1800 if ((s->cert == NULL) || 1801 (s->cert->key->x509 == NULL) || 1802 (s->cert->key->privatekey == NULL)) 1803 s->state=SSL3_ST_CW_CERT_B; 1804 else 1805 s->state=SSL3_ST_CW_CERT_C; 1806 } 1807 1808 /* We need to get a client cert */ 1809 if (s->state == SSL3_ST_CW_CERT_B) 1810 { 1811 /* If we get an error, we need to 1812 * ssl->rwstate=SSL_X509_LOOKUP; return(-1); 1813 * We then get retied later */ 1814 i=0; 1815 if (s->ctx->client_cert_cb != NULL) 1816 i=s->ctx->client_cert_cb(s,&(x509),&(pkey)); 1817 if (i < 0) 1818 { 1819 s->rwstate=SSL_X509_LOOKUP; 1820 return(-1); 1821 } 1822 s->rwstate=SSL_NOTHING; 1823 if ((i == 1) && (pkey != NULL) && (x509 != NULL)) 1824 { 1825 s->state=SSL3_ST_CW_CERT_B; 1826 if ( !SSL_use_certificate(s,x509) || 1827 !SSL_use_PrivateKey(s,pkey)) 1828 i=0; 1829 } 1830 else if (i == 1) 1831 { 1832 i=0; 1833 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); 1834 } 1835 1836 if (x509 != NULL) X509_free(x509); 1837 if (pkey != NULL) EVP_PKEY_free(pkey); 1838 if (i == 0) 1839 { 1840 if (s->version == SSL3_VERSION) 1841 { 1842 s->s3->tmp.cert_req=0; 1843 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE); 1844 return(1); 1845 } 1846 else 1847 { 1848 s->s3->tmp.cert_req=2; 1849 } 1850 } 1851 1852 /* Ok, we have a cert */ 1853 s->state=SSL3_ST_CW_CERT_C; 1854 } 1855 1856 if (s->state == SSL3_ST_CW_CERT_C) 1857 { 1858 s->state=SSL3_ST_CW_CERT_D; 1859 l=ssl3_output_cert_chain(s, 1860 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509); 1861 s->init_num=(int)l; 1862 s->init_off=0; 1863 } 1864 /* SSL3_ST_CW_CERT_D */ 1865 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 1866 } 1867 1868#define has_bits(i,m) (((i)&(m)) == (m)) 1869 1870static int ssl3_check_cert_and_algorithm(SSL *s) 1871 { 1872 int i,idx; 1873 long algs; 1874 EVP_PKEY *pkey=NULL; 1875 SESS_CERT *sc; 1876#ifndef OPENSSL_NO_RSA 1877 RSA *rsa; 1878#endif 1879#ifndef OPENSSL_NO_DH 1880 DH *dh; 1881#endif 1882 1883 sc=s->session->sess_cert; 1884 1885 if (sc == NULL) 1886 { 1887 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR); 1888 goto err; 1889 } 1890 1891 algs=s->s3->tmp.new_cipher->algorithms; 1892 1893 /* we don't have a certificate */ 1894 if (algs & (SSL_aDH|SSL_aNULL|SSL_aKRB5)) 1895 return(1); 1896 1897#ifndef OPENSSL_NO_RSA 1898 rsa=s->session->sess_cert->peer_rsa_tmp; 1899#endif 1900#ifndef OPENSSL_NO_DH 1901 dh=s->session->sess_cert->peer_dh_tmp; 1902#endif 1903 1904 /* This is the passed certificate */ 1905 1906 idx=sc->peer_cert_type; 1907 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509); 1908 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey); 1909 EVP_PKEY_free(pkey); 1910 1911 1912 /* Check that we have a certificate if we require one */ 1913 if ((algs & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN)) 1914 { 1915 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT); 1916 goto f_err; 1917 } 1918#ifndef OPENSSL_NO_DSA 1919 else if ((algs & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN)) 1920 { 1921 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT); 1922 goto f_err; 1923 } 1924#endif 1925#ifndef OPENSSL_NO_RSA 1926 if ((algs & SSL_kRSA) && 1927 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL))) 1928 { 1929 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT); 1930 goto f_err; 1931 } 1932#endif 1933#ifndef OPENSSL_NO_DH 1934 if ((algs & SSL_kEDH) && 1935 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL))) 1936 { 1937 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY); 1938 goto f_err; 1939 } 1940 else if ((algs & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA)) 1941 { 1942 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT); 1943 goto f_err; 1944 } 1945#ifndef OPENSSL_NO_DSA 1946 else if ((algs & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA)) 1947 { 1948 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT); 1949 goto f_err; 1950 } 1951#endif 1952#endif 1953 1954 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP)) 1955 { 1956#ifndef OPENSSL_NO_RSA 1957 if (algs & SSL_kRSA) 1958 { 1959 if (rsa == NULL 1960 || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) 1961 { 1962 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY); 1963 goto f_err; 1964 } 1965 } 1966 else 1967#endif 1968#ifndef OPENSSL_NO_DH 1969 if (algs & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) 1970 { 1971 if (dh == NULL 1972 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) 1973 { 1974 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY); 1975 goto f_err; 1976 } 1977 } 1978 else 1979#endif 1980 { 1981 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE); 1982 goto f_err; 1983 } 1984 } 1985 return(1); 1986f_err: 1987 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); 1988err: 1989 return(0); 1990 } 1991 1992