s2_clnt.c revision 110007
1/* ssl/s2_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) 1998-2001 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 "ssl_locl.h" 113#ifndef OPENSSL_NO_SSL2 114#include <stdio.h> 115#include <openssl/rand.h> 116#include <openssl/buffer.h> 117#include <openssl/objects.h> 118#include <openssl/evp.h> 119#include "cryptlib.h" 120 121static SSL_METHOD *ssl2_get_client_method(int ver); 122static int get_server_finished(SSL *s); 123static int get_server_verify(SSL *s); 124static int get_server_hello(SSL *s); 125static int client_hello(SSL *s); 126static int client_master_key(SSL *s); 127static int client_finished(SSL *s); 128static int client_certificate(SSL *s); 129static int ssl_rsa_public_encrypt(SESS_CERT *sc, int len, unsigned char *from, 130 unsigned char *to,int padding); 131#define BREAK break 132 133static SSL_METHOD *ssl2_get_client_method(int ver) 134 { 135 if (ver == SSL2_VERSION) 136 return(SSLv2_client_method()); 137 else 138 return(NULL); 139 } 140 141SSL_METHOD *SSLv2_client_method(void) 142 { 143 static int init=1; 144 static SSL_METHOD SSLv2_client_data; 145 146 if (init) 147 { 148 CRYPTO_w_lock(CRYPTO_LOCK_SSL_METHOD); 149 150 if (init) 151 { 152 memcpy((char *)&SSLv2_client_data,(char *)sslv2_base_method(), 153 sizeof(SSL_METHOD)); 154 SSLv2_client_data.ssl_connect=ssl2_connect; 155 SSLv2_client_data.get_ssl_method=ssl2_get_client_method; 156 init=0; 157 } 158 159 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_METHOD); 160 } 161 return(&SSLv2_client_data); 162 } 163 164int ssl2_connect(SSL *s) 165 { 166 unsigned long l=time(NULL); 167 BUF_MEM *buf=NULL; 168 int ret= -1; 169 void (*cb)(const SSL *ssl,int type,int val)=NULL; 170 int new_state,state; 171 172 RAND_add(&l,sizeof(l),0); 173 ERR_clear_error(); 174 clear_sys_error(); 175 176 if (s->info_callback != NULL) 177 cb=s->info_callback; 178 else if (s->ctx->info_callback != NULL) 179 cb=s->ctx->info_callback; 180 181 /* init things to blank */ 182 s->in_handshake++; 183 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); 184 185 for (;;) 186 { 187 state=s->state; 188 189 switch (s->state) 190 { 191 case SSL_ST_BEFORE: 192 case SSL_ST_CONNECT: 193 case SSL_ST_BEFORE|SSL_ST_CONNECT: 194 case SSL_ST_OK|SSL_ST_CONNECT: 195 196 s->server=0; 197 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1); 198 199 s->version=SSL2_VERSION; 200 s->type=SSL_ST_CONNECT; 201 202 buf=s->init_buf; 203 if ((buf == NULL) && ((buf=BUF_MEM_new()) == NULL)) 204 { 205 ret= -1; 206 goto end; 207 } 208 if (!BUF_MEM_grow(buf, 209 SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)) 210 { 211 if (buf == s->init_buf) 212 buf=NULL; 213 ret= -1; 214 goto end; 215 } 216 s->init_buf=buf; 217 buf=NULL; 218 s->init_num=0; 219 s->state=SSL2_ST_SEND_CLIENT_HELLO_A; 220 s->ctx->stats.sess_connect++; 221 s->handshake_func=ssl2_connect; 222 BREAK; 223 224 case SSL2_ST_SEND_CLIENT_HELLO_A: 225 case SSL2_ST_SEND_CLIENT_HELLO_B: 226 s->shutdown=0; 227 ret=client_hello(s); 228 if (ret <= 0) goto end; 229 s->init_num=0; 230 s->state=SSL2_ST_GET_SERVER_HELLO_A; 231 BREAK; 232 233 case SSL2_ST_GET_SERVER_HELLO_A: 234 case SSL2_ST_GET_SERVER_HELLO_B: 235 ret=get_server_hello(s); 236 if (ret <= 0) goto end; 237 s->init_num=0; 238 if (!s->hit) /* new session */ 239 { 240 s->state=SSL2_ST_SEND_CLIENT_MASTER_KEY_A; 241 BREAK; 242 } 243 else 244 { 245 s->state=SSL2_ST_CLIENT_START_ENCRYPTION; 246 break; 247 } 248 249 case SSL2_ST_SEND_CLIENT_MASTER_KEY_A: 250 case SSL2_ST_SEND_CLIENT_MASTER_KEY_B: 251 ret=client_master_key(s); 252 if (ret <= 0) goto end; 253 s->init_num=0; 254 s->state=SSL2_ST_CLIENT_START_ENCRYPTION; 255 break; 256 257 case SSL2_ST_CLIENT_START_ENCRYPTION: 258 /* Ok, we now have all the stuff needed to 259 * start encrypting, so lets fire it up :-) */ 260 if (!ssl2_enc_init(s,1)) 261 { 262 ret= -1; 263 goto end; 264 } 265 s->s2->clear_text=0; 266 s->state=SSL2_ST_SEND_CLIENT_FINISHED_A; 267 break; 268 269 case SSL2_ST_SEND_CLIENT_FINISHED_A: 270 case SSL2_ST_SEND_CLIENT_FINISHED_B: 271 ret=client_finished(s); 272 if (ret <= 0) goto end; 273 s->init_num=0; 274 s->state=SSL2_ST_GET_SERVER_VERIFY_A; 275 break; 276 277 case SSL2_ST_GET_SERVER_VERIFY_A: 278 case SSL2_ST_GET_SERVER_VERIFY_B: 279 ret=get_server_verify(s); 280 if (ret <= 0) goto end; 281 s->init_num=0; 282 s->state=SSL2_ST_GET_SERVER_FINISHED_A; 283 break; 284 285 case SSL2_ST_GET_SERVER_FINISHED_A: 286 case SSL2_ST_GET_SERVER_FINISHED_B: 287 ret=get_server_finished(s); 288 if (ret <= 0) goto end; 289 break; 290 291 case SSL2_ST_SEND_CLIENT_CERTIFICATE_A: 292 case SSL2_ST_SEND_CLIENT_CERTIFICATE_B: 293 case SSL2_ST_SEND_CLIENT_CERTIFICATE_C: 294 case SSL2_ST_SEND_CLIENT_CERTIFICATE_D: 295 case SSL2_ST_X509_GET_CLIENT_CERTIFICATE: 296 ret=client_certificate(s); 297 if (ret <= 0) goto end; 298 s->init_num=0; 299 s->state=SSL2_ST_GET_SERVER_FINISHED_A; 300 break; 301 302 case SSL_ST_OK: 303 if (s->init_buf != NULL) 304 { 305 BUF_MEM_free(s->init_buf); 306 s->init_buf=NULL; 307 } 308 s->init_num=0; 309 /* ERR_clear_error();*/ 310 311 /* If we want to cache session-ids in the client 312 * and we successfully add the session-id to the 313 * cache, and there is a callback, then pass it out. 314 * 26/11/96 - eay - only add if not a re-used session. 315 */ 316 317 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT); 318 if (s->hit) s->ctx->stats.sess_hit++; 319 320 ret=1; 321 /* s->server=0; */ 322 s->ctx->stats.sess_connect_good++; 323 324 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1); 325 326 goto end; 327 /* break; */ 328 default: 329 SSLerr(SSL_F_SSL2_CONNECT,SSL_R_UNKNOWN_STATE); 330 return(-1); 331 /* break; */ 332 } 333 334 if ((cb != NULL) && (s->state != state)) 335 { 336 new_state=s->state; 337 s->state=state; 338 cb(s,SSL_CB_CONNECT_LOOP,1); 339 s->state=new_state; 340 } 341 } 342end: 343 s->in_handshake--; 344 if (buf != NULL) 345 BUF_MEM_free(buf); 346 if (cb != NULL) 347 cb(s,SSL_CB_CONNECT_EXIT,ret); 348 return(ret); 349 } 350 351static int get_server_hello(SSL *s) 352 { 353 unsigned char *buf; 354 unsigned char *p; 355 int i,j; 356 unsigned long len; 357 STACK_OF(SSL_CIPHER) *sk=NULL,*cl, *prio, *allow; 358 359 buf=(unsigned char *)s->init_buf->data; 360 p=buf; 361 if (s->state == SSL2_ST_GET_SERVER_HELLO_A) 362 { 363 i=ssl2_read(s,(char *)&(buf[s->init_num]),11-s->init_num); 364 if (i < (11-s->init_num)) 365 return(ssl2_part_read(s,SSL_F_GET_SERVER_HELLO,i)); 366 s->init_num = 11; 367 368 if (*(p++) != SSL2_MT_SERVER_HELLO) 369 { 370 if (p[-1] != SSL2_MT_ERROR) 371 { 372 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); 373 SSLerr(SSL_F_GET_SERVER_HELLO, 374 SSL_R_READ_WRONG_PACKET_TYPE); 375 } 376 else 377 SSLerr(SSL_F_GET_SERVER_HELLO, 378 SSL_R_PEER_ERROR); 379 return(-1); 380 } 381#ifdef __APPLE_CC__ 382 /* The Rhapsody 5.5 (a.k.a. MacOS X) compiler bug 383 * workaround. <appro@fy.chalmers.se> */ 384 s->hit=(i=*(p++))?1:0; 385#else 386 s->hit=(*(p++))?1:0; 387#endif 388 s->s2->tmp.cert_type= *(p++); 389 n2s(p,i); 390 if (i < s->version) s->version=i; 391 n2s(p,i); s->s2->tmp.cert_length=i; 392 n2s(p,i); s->s2->tmp.csl=i; 393 n2s(p,i); s->s2->tmp.conn_id_length=i; 394 s->state=SSL2_ST_GET_SERVER_HELLO_B; 395 } 396 397 /* SSL2_ST_GET_SERVER_HELLO_B */ 398 len = 11 + (unsigned long)s->s2->tmp.cert_length + (unsigned long)s->s2->tmp.csl + (unsigned long)s->s2->tmp.conn_id_length; 399 if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER) 400 { 401 SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_MESSAGE_TOO_LONG); 402 return -1; 403 } 404 j = (int)len - s->init_num; 405 i = ssl2_read(s,(char *)&(buf[s->init_num]),j); 406 if (i != j) return(ssl2_part_read(s,SSL_F_GET_SERVER_HELLO,i)); 407 if (s->msg_callback) 408 s->msg_callback(0, s->version, 0, buf, (size_t)len, s, s->msg_callback_arg); /* SERVER-HELLO */ 409 410 /* things are looking good */ 411 412 p = buf + 11; 413 if (s->hit) 414 { 415 if (s->s2->tmp.cert_length != 0) 416 { 417 SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_REUSE_CERT_LENGTH_NOT_ZERO); 418 return(-1); 419 } 420 if (s->s2->tmp.cert_type != 0) 421 { 422 if (!(s->options & 423 SSL_OP_SSLREF2_REUSE_CERT_TYPE_BUG)) 424 { 425 SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_REUSE_CERT_TYPE_NOT_ZERO); 426 return(-1); 427 } 428 } 429 if (s->s2->tmp.csl != 0) 430 { 431 SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_REUSE_CIPHER_LIST_NOT_ZERO); 432 return(-1); 433 } 434 } 435 else 436 { 437#ifdef undef 438 /* very bad */ 439 memset(s->session->session_id,0, 440 SSL_MAX_SSL_SESSION_ID_LENGTH_IN_BYTES); 441 s->session->session_id_length=0; 442 */ 443#endif 444 445 /* we need to do this in case we were trying to reuse a 446 * client session but others are already reusing it. 447 * If this was a new 'blank' session ID, the session-id 448 * length will still be 0 */ 449 if (s->session->session_id_length > 0) 450 { 451 if (!ssl_get_new_session(s,0)) 452 { 453 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); 454 return(-1); 455 } 456 } 457 458 if (ssl2_set_certificate(s,s->s2->tmp.cert_type, 459 s->s2->tmp.cert_length,p) <= 0) 460 { 461 ssl2_return_error(s,SSL2_PE_BAD_CERTIFICATE); 462 return(-1); 463 } 464 p+=s->s2->tmp.cert_length; 465 466 if (s->s2->tmp.csl == 0) 467 { 468 ssl2_return_error(s,SSL2_PE_NO_CIPHER); 469 SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_NO_CIPHER_LIST); 470 return(-1); 471 } 472 473 /* We have just received a list of ciphers back from the 474 * server. We need to get the ones that match, then select 475 * the one we want the most :-). */ 476 477 /* load the ciphers */ 478 sk=ssl_bytes_to_cipher_list(s,p,s->s2->tmp.csl, 479 &s->session->ciphers); 480 p+=s->s2->tmp.csl; 481 if (sk == NULL) 482 { 483 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); 484 SSLerr(SSL_F_GET_SERVER_HELLO,ERR_R_MALLOC_FAILURE); 485 return(-1); 486 } 487 488 sk_SSL_CIPHER_set_cmp_func(sk,ssl_cipher_ptr_id_cmp); 489 490 /* get the array of ciphers we will accept */ 491 cl=SSL_get_ciphers(s); 492 sk_SSL_CIPHER_set_cmp_func(cl,ssl_cipher_ptr_id_cmp); 493 494 /* 495 * If server preference flag set, choose the first 496 * (highest priority) cipher the server sends, otherwise 497 * client preference has priority. 498 */ 499 if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE) 500 { 501 prio = sk; 502 allow = cl; 503 } 504 else 505 { 506 prio = cl; 507 allow = sk; 508 } 509 /* In theory we could have ciphers sent back that we 510 * don't want to use but that does not matter since we 511 * will check against the list we originally sent and 512 * for performance reasons we should not bother to match 513 * the two lists up just to check. */ 514 for (i=0; i<sk_SSL_CIPHER_num(prio); i++) 515 { 516 if (sk_SSL_CIPHER_find(allow, 517 sk_SSL_CIPHER_value(prio,i)) >= 0) 518 break; 519 } 520 521 if (i >= sk_SSL_CIPHER_num(prio)) 522 { 523 ssl2_return_error(s,SSL2_PE_NO_CIPHER); 524 SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_NO_CIPHER_MATCH); 525 return(-1); 526 } 527 s->session->cipher=sk_SSL_CIPHER_value(prio,i); 528 529 530 if (s->session->peer != NULL) /* can't happen*/ 531 { 532 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); 533 SSLerr(SSL_F_GET_SERVER_HELLO, ERR_R_INTERNAL_ERROR); 534 return(-1); 535 } 536 537 s->session->peer = s->session->sess_cert->peer_key->x509; 538 /* peer_key->x509 has been set by ssl2_set_certificate. */ 539 CRYPTO_add(&s->session->peer->references, 1, CRYPTO_LOCK_X509); 540 } 541 542 if (s->session->peer != s->session->sess_cert->peer_key->x509) 543 /* can't happen */ 544 { 545 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); 546 SSLerr(SSL_F_GET_SERVER_HELLO, ERR_R_INTERNAL_ERROR); 547 return(-1); 548 } 549 550 s->s2->conn_id_length=s->s2->tmp.conn_id_length; 551 if (s->s2->conn_id_length > sizeof s->s2->conn_id) 552 { 553 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); 554 SSLerr(SSL_F_GET_SERVER_HELLO, SSL_R_SSL2_CONNECTION_ID_TOO_LONG); 555 return -1; 556 } 557 memcpy(s->s2->conn_id,p,s->s2->tmp.conn_id_length); 558 return(1); 559 } 560 561static int client_hello(SSL *s) 562 { 563 unsigned char *buf; 564 unsigned char *p,*d; 565/* CIPHER **cipher;*/ 566 int i,n,j; 567 568 buf=(unsigned char *)s->init_buf->data; 569 if (s->state == SSL2_ST_SEND_CLIENT_HELLO_A) 570 { 571 if ((s->session == NULL) || 572 (s->session->ssl_version != s->version)) 573 { 574 if (!ssl_get_new_session(s,0)) 575 { 576 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); 577 return(-1); 578 } 579 } 580 /* else use the pre-loaded session */ 581 582 p=buf; /* header */ 583 d=p+9; /* data section */ 584 *(p++)=SSL2_MT_CLIENT_HELLO; /* type */ 585 s2n(SSL2_VERSION,p); /* version */ 586 n=j=0; 587 588 n=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),d); 589 d+=n; 590 591 if (n == 0) 592 { 593 SSLerr(SSL_F_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE); 594 return(-1); 595 } 596 597 s2n(n,p); /* cipher spec num bytes */ 598 599 if ((s->session->session_id_length > 0) && 600 (s->session->session_id_length <= 601 SSL2_MAX_SSL_SESSION_ID_LENGTH)) 602 { 603 i=s->session->session_id_length; 604 s2n(i,p); /* session id length */ 605 memcpy(d,s->session->session_id,(unsigned int)i); 606 d+=i; 607 } 608 else 609 { 610 s2n(0,p); 611 } 612 613 s->s2->challenge_length=SSL2_CHALLENGE_LENGTH; 614 s2n(SSL2_CHALLENGE_LENGTH,p); /* challenge length */ 615 /*challenge id data*/ 616 RAND_pseudo_bytes(s->s2->challenge,SSL2_CHALLENGE_LENGTH); 617 memcpy(d,s->s2->challenge,SSL2_CHALLENGE_LENGTH); 618 d+=SSL2_CHALLENGE_LENGTH; 619 620 s->state=SSL2_ST_SEND_CLIENT_HELLO_B; 621 s->init_num=d-buf; 622 s->init_off=0; 623 } 624 /* SSL2_ST_SEND_CLIENT_HELLO_B */ 625 return(ssl2_do_write(s)); 626 } 627 628static int client_master_key(SSL *s) 629 { 630 unsigned char *buf; 631 unsigned char *p,*d; 632 int clear,enc,karg,i; 633 SSL_SESSION *sess; 634 const EVP_CIPHER *c; 635 const EVP_MD *md; 636 637 buf=(unsigned char *)s->init_buf->data; 638 if (s->state == SSL2_ST_SEND_CLIENT_MASTER_KEY_A) 639 { 640 641 if (!ssl_cipher_get_evp(s->session,&c,&md,NULL)) 642 { 643 ssl2_return_error(s,SSL2_PE_NO_CIPHER); 644 SSLerr(SSL_F_CLIENT_MASTER_KEY,SSL_R_PROBLEMS_MAPPING_CIPHER_FUNCTIONS); 645 return(-1); 646 } 647 sess=s->session; 648 p=buf; 649 d=p+10; 650 *(p++)=SSL2_MT_CLIENT_MASTER_KEY;/* type */ 651 652 i=ssl_put_cipher_by_char(s,sess->cipher,p); 653 p+=i; 654 655 /* make key_arg data */ 656 i=EVP_CIPHER_iv_length(c); 657 sess->key_arg_length=i; 658 if (i > SSL_MAX_KEY_ARG_LENGTH) 659 { 660 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); 661 SSLerr(SSL_F_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR); 662 return -1; 663 } 664 if (i > 0) RAND_pseudo_bytes(sess->key_arg,i); 665 666 /* make a master key */ 667 i=EVP_CIPHER_key_length(c); 668 sess->master_key_length=i; 669 if (i > 0) 670 { 671 if (i > sizeof sess->master_key) 672 { 673 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); 674 SSLerr(SSL_F_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR); 675 return -1; 676 } 677 if (RAND_bytes(sess->master_key,i) <= 0) 678 { 679 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); 680 return(-1); 681 } 682 } 683 684 if (sess->cipher->algorithm2 & SSL2_CF_8_BYTE_ENC) 685 enc=8; 686 else if (SSL_C_IS_EXPORT(sess->cipher)) 687 enc=5; 688 else 689 enc=i; 690 691 if (i < enc) 692 { 693 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); 694 SSLerr(SSL_F_CLIENT_MASTER_KEY,SSL_R_CIPHER_TABLE_SRC_ERROR); 695 return(-1); 696 } 697 clear=i-enc; 698 s2n(clear,p); 699 memcpy(d,sess->master_key,(unsigned int)clear); 700 d+=clear; 701 702 enc=ssl_rsa_public_encrypt(sess->sess_cert,enc, 703 &(sess->master_key[clear]),d, 704 (s->s2->ssl2_rollback)?RSA_SSLV23_PADDING:RSA_PKCS1_PADDING); 705 if (enc <= 0) 706 { 707 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); 708 SSLerr(SSL_F_CLIENT_MASTER_KEY,SSL_R_PUBLIC_KEY_ENCRYPT_ERROR); 709 return(-1); 710 } 711#ifdef PKCS1_CHECK 712 if (s->options & SSL_OP_PKCS1_CHECK_1) d[1]++; 713 if (s->options & SSL_OP_PKCS1_CHECK_2) 714 sess->master_key[clear]++; 715#endif 716 s2n(enc,p); 717 d+=enc; 718 karg=sess->key_arg_length; 719 s2n(karg,p); /* key arg size */ 720 if (karg > sizeof sess->key_arg) 721 { 722 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); 723 SSLerr(SSL_F_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR); 724 return -1; 725 } 726 memcpy(d,sess->key_arg,(unsigned int)karg); 727 d+=karg; 728 729 s->state=SSL2_ST_SEND_CLIENT_MASTER_KEY_B; 730 s->init_num=d-buf; 731 s->init_off=0; 732 } 733 734 /* SSL2_ST_SEND_CLIENT_MASTER_KEY_B */ 735 return(ssl2_do_write(s)); 736 } 737 738static int client_finished(SSL *s) 739 { 740 unsigned char *p; 741 742 if (s->state == SSL2_ST_SEND_CLIENT_FINISHED_A) 743 { 744 p=(unsigned char *)s->init_buf->data; 745 *(p++)=SSL2_MT_CLIENT_FINISHED; 746 if (s->s2->conn_id_length > sizeof s->s2->conn_id) 747 { 748 SSLerr(SSL_F_CLIENT_FINISHED, ERR_R_INTERNAL_ERROR); 749 return -1; 750 } 751 memcpy(p,s->s2->conn_id,(unsigned int)s->s2->conn_id_length); 752 753 s->state=SSL2_ST_SEND_CLIENT_FINISHED_B; 754 s->init_num=s->s2->conn_id_length+1; 755 s->init_off=0; 756 } 757 return(ssl2_do_write(s)); 758 } 759 760/* read the data and then respond */ 761static int client_certificate(SSL *s) 762 { 763 unsigned char *buf; 764 unsigned char *p,*d; 765 int i; 766 unsigned int n; 767 int cert_ch_len; 768 unsigned char *cert_ch; 769 770 buf=(unsigned char *)s->init_buf->data; 771 772 /* We have a cert associated with the SSL, so attach it to 773 * the session if it does not have one */ 774 775 if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_A) 776 { 777 i=ssl2_read(s,(char *)&(buf[s->init_num]), 778 SSL2_MAX_CERT_CHALLENGE_LENGTH+2-s->init_num); 779 if (i<(SSL2_MIN_CERT_CHALLENGE_LENGTH+2-s->init_num)) 780 return(ssl2_part_read(s,SSL_F_CLIENT_CERTIFICATE,i)); 781 s->init_num += i; 782 if (s->msg_callback) 783 s->msg_callback(0, s->version, 0, buf, (size_t)s->init_num, s, s->msg_callback_arg); /* REQUEST-CERTIFICATE */ 784 785 /* type=buf[0]; */ 786 /* type eq x509 */ 787 if (buf[1] != SSL2_AT_MD5_WITH_RSA_ENCRYPTION) 788 { 789 ssl2_return_error(s,SSL2_PE_UNSUPPORTED_CERTIFICATE_TYPE); 790 SSLerr(SSL_F_CLIENT_CERTIFICATE,SSL_R_BAD_AUTHENTICATION_TYPE); 791 return(-1); 792 } 793 794 if ((s->cert == NULL) || 795 (s->cert->key->x509 == NULL) || 796 (s->cert->key->privatekey == NULL)) 797 { 798 s->state=SSL2_ST_X509_GET_CLIENT_CERTIFICATE; 799 } 800 else 801 s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_C; 802 } 803 804 cert_ch = buf + 2; 805 cert_ch_len = s->init_num - 2; 806 807 if (s->state == SSL2_ST_X509_GET_CLIENT_CERTIFICATE) 808 { 809 X509 *x509=NULL; 810 EVP_PKEY *pkey=NULL; 811 812 /* If we get an error we need to 813 * ssl->rwstate=SSL_X509_LOOKUP; 814 * return(error); 815 * We should then be retried when things are ok and we 816 * can get a cert or not */ 817 818 i=0; 819 if (s->ctx->client_cert_cb != NULL) 820 { 821 i=s->ctx->client_cert_cb(s,&(x509),&(pkey)); 822 } 823 824 if (i < 0) 825 { 826 s->rwstate=SSL_X509_LOOKUP; 827 return(-1); 828 } 829 s->rwstate=SSL_NOTHING; 830 831 if ((i == 1) && (pkey != NULL) && (x509 != NULL)) 832 { 833 s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_C; 834 if ( !SSL_use_certificate(s,x509) || 835 !SSL_use_PrivateKey(s,pkey)) 836 { 837 i=0; 838 } 839 X509_free(x509); 840 EVP_PKEY_free(pkey); 841 } 842 else if (i == 1) 843 { 844 if (x509 != NULL) X509_free(x509); 845 if (pkey != NULL) EVP_PKEY_free(pkey); 846 SSLerr(SSL_F_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); 847 i=0; 848 } 849 850 if (i == 0) 851 { 852 /* We have no client certificate to respond with 853 * so send the correct error message back */ 854 s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_B; 855 p=buf; 856 *(p++)=SSL2_MT_ERROR; 857 s2n(SSL2_PE_NO_CERTIFICATE,p); 858 s->init_off=0; 859 s->init_num=3; 860 /* Write is done at the end */ 861 } 862 } 863 864 if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_B) 865 { 866 return(ssl2_do_write(s)); 867 } 868 869 if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_C) 870 { 871 EVP_MD_CTX ctx; 872 873 /* ok, now we calculate the checksum 874 * do it first so we can reuse buf :-) */ 875 p=buf; 876 EVP_MD_CTX_init(&ctx); 877 EVP_SignInit_ex(&ctx,s->ctx->rsa_md5, NULL); 878 EVP_SignUpdate(&ctx,s->s2->key_material, 879 s->s2->key_material_length); 880 EVP_SignUpdate(&ctx,cert_ch,(unsigned int)cert_ch_len); 881 n=i2d_X509(s->session->sess_cert->peer_key->x509,&p); 882 EVP_SignUpdate(&ctx,buf,(unsigned int)n); 883 884 p=buf; 885 d=p+6; 886 *(p++)=SSL2_MT_CLIENT_CERTIFICATE; 887 *(p++)=SSL2_CT_X509_CERTIFICATE; 888 n=i2d_X509(s->cert->key->x509,&d); 889 s2n(n,p); 890 891 if (!EVP_SignFinal(&ctx,d,&n,s->cert->key->privatekey)) 892 { 893 /* this is not good. If things have failed it 894 * means there so something wrong with the key. 895 * We will continue with a 0 length signature 896 */ 897 } 898 EVP_MD_CTX_cleanup(&ctx); 899 s2n(n,p); 900 d+=n; 901 902 s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_D; 903 s->init_num=d-buf; 904 s->init_off=0; 905 } 906 /* if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_D) */ 907 return(ssl2_do_write(s)); 908 } 909 910static int get_server_verify(SSL *s) 911 { 912 unsigned char *p; 913 int i, n, len; 914 915 p=(unsigned char *)s->init_buf->data; 916 if (s->state == SSL2_ST_GET_SERVER_VERIFY_A) 917 { 918 i=ssl2_read(s,(char *)&(p[s->init_num]),1-s->init_num); 919 if (i < (1-s->init_num)) 920 return(ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i)); 921 s->init_num += i; 922 923 s->state= SSL2_ST_GET_SERVER_VERIFY_B; 924 if (*p != SSL2_MT_SERVER_VERIFY) 925 { 926 if (p[0] != SSL2_MT_ERROR) 927 { 928 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); 929 SSLerr(SSL_F_GET_SERVER_VERIFY, 930 SSL_R_READ_WRONG_PACKET_TYPE); 931 } 932 else 933 { 934 SSLerr(SSL_F_GET_SERVER_VERIFY,SSL_R_PEER_ERROR); 935 /* try to read the error message */ 936 i=ssl2_read(s,(char *)&(p[s->init_num]),3-s->init_num); 937 return ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i); 938 } 939 return(-1); 940 } 941 } 942 943 p=(unsigned char *)s->init_buf->data; 944 len = 1 + s->s2->challenge_length; 945 n = len - s->init_num; 946 i = ssl2_read(s,(char *)&(p[s->init_num]),n); 947 if (i < n) 948 return(ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i)); 949 if (s->msg_callback) 950 s->msg_callback(0, s->version, 0, p, len, s, s->msg_callback_arg); /* SERVER-VERIFY */ 951 p += 1; 952 953 if (memcmp(p,s->s2->challenge,s->s2->challenge_length) != 0) 954 { 955 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); 956 SSLerr(SSL_F_GET_SERVER_VERIFY,SSL_R_CHALLENGE_IS_DIFFERENT); 957 return(-1); 958 } 959 return(1); 960 } 961 962static int get_server_finished(SSL *s) 963 { 964 unsigned char *buf; 965 unsigned char *p; 966 int i, n, len; 967 968 buf=(unsigned char *)s->init_buf->data; 969 p=buf; 970 if (s->state == SSL2_ST_GET_SERVER_FINISHED_A) 971 { 972 i=ssl2_read(s,(char *)&(buf[s->init_num]),1-s->init_num); 973 if (i < (1-s->init_num)) 974 return(ssl2_part_read(s,SSL_F_GET_SERVER_FINISHED,i)); 975 s->init_num += i; 976 977 if (*p == SSL2_MT_REQUEST_CERTIFICATE) 978 { 979 s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_A; 980 return(1); 981 } 982 else if (*p != SSL2_MT_SERVER_FINISHED) 983 { 984 if (p[0] != SSL2_MT_ERROR) 985 { 986 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); 987 SSLerr(SSL_F_GET_SERVER_FINISHED,SSL_R_READ_WRONG_PACKET_TYPE); 988 } 989 else 990 { 991 SSLerr(SSL_F_GET_SERVER_FINISHED,SSL_R_PEER_ERROR); 992 /* try to read the error message */ 993 i=ssl2_read(s,(char *)&(p[s->init_num]),3-s->init_num); 994 return ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i); 995 } 996 return(-1); 997 } 998 s->state=SSL2_ST_GET_SERVER_FINISHED_B; 999 } 1000 1001 len = 1 + SSL2_SSL_SESSION_ID_LENGTH; 1002 n = len - s->init_num; 1003 i = ssl2_read(s,(char *)&(buf[s->init_num]), n); 1004 if (i < n) /* XXX could be shorter than SSL2_SSL_SESSION_ID_LENGTH, that's the maximum */ 1005 return(ssl2_part_read(s,SSL_F_GET_SERVER_FINISHED,i)); 1006 s->init_num += i; 1007 if (s->msg_callback) 1008 s->msg_callback(0, s->version, 0, buf, (size_t)s->init_num, s, s->msg_callback_arg); /* SERVER-FINISHED */ 1009 1010 if (!s->hit) /* new session */ 1011 { 1012 /* new session-id */ 1013 /* Make sure we were not trying to re-use an old SSL_SESSION 1014 * or bad things can happen */ 1015 /* ZZZZZZZZZZZZZ */ 1016 s->session->session_id_length=SSL2_SSL_SESSION_ID_LENGTH; 1017 memcpy(s->session->session_id,p+1,SSL2_SSL_SESSION_ID_LENGTH); 1018 } 1019 else 1020 { 1021 if (!(s->options & SSL_OP_MICROSOFT_SESS_ID_BUG)) 1022 { 1023 if ((s->session->session_id_length > sizeof s->session->session_id) 1024 || (0 != memcmp(buf, s->session->session_id, 1025 (unsigned int)s->session->session_id_length))) 1026 { 1027 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); 1028 SSLerr(SSL_F_GET_SERVER_FINISHED,SSL_R_SSL_SESSION_ID_IS_DIFFERENT); 1029 return(-1); 1030 } 1031 } 1032 } 1033 s->state = SSL_ST_OK; 1034 return(1); 1035 } 1036 1037/* loads in the certificate from the server */ 1038int ssl2_set_certificate(SSL *s, int type, int len, unsigned char *data) 1039 { 1040 STACK_OF(X509) *sk=NULL; 1041 EVP_PKEY *pkey=NULL; 1042 SESS_CERT *sc=NULL; 1043 int i; 1044 X509 *x509=NULL; 1045 int ret=0; 1046 1047 x509=d2i_X509(NULL,&data,(long)len); 1048 if (x509 == NULL) 1049 { 1050 SSLerr(SSL_F_SSL2_SET_CERTIFICATE,ERR_R_X509_LIB); 1051 goto err; 1052 } 1053 1054 if ((sk=sk_X509_new_null()) == NULL || !sk_X509_push(sk,x509)) 1055 { 1056 SSLerr(SSL_F_SSL2_SET_CERTIFICATE,ERR_R_MALLOC_FAILURE); 1057 goto err; 1058 } 1059 1060 i=ssl_verify_cert_chain(s,sk); 1061 1062 if ((s->verify_mode != SSL_VERIFY_NONE) && (!i)) 1063 { 1064 SSLerr(SSL_F_SSL2_SET_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED); 1065 goto err; 1066 } 1067 ERR_clear_error(); /* but we keep s->verify_result */ 1068 s->session->verify_result = s->verify_result; 1069 1070 /* server's cert for this session */ 1071 sc=ssl_sess_cert_new(); 1072 if (sc == NULL) 1073 { 1074 ret= -1; 1075 goto err; 1076 } 1077 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert); 1078 s->session->sess_cert=sc; 1079 1080 sc->peer_pkeys[SSL_PKEY_RSA_ENC].x509=x509; 1081 sc->peer_key= &(sc->peer_pkeys[SSL_PKEY_RSA_ENC]); 1082 1083 pkey=X509_get_pubkey(x509); 1084 x509=NULL; 1085 if (pkey == NULL) 1086 { 1087 SSLerr(SSL_F_SSL2_SET_CERTIFICATE,SSL_R_UNABLE_TO_EXTRACT_PUBLIC_KEY); 1088 goto err; 1089 } 1090 if (pkey->type != EVP_PKEY_RSA) 1091 { 1092 SSLerr(SSL_F_SSL2_SET_CERTIFICATE,SSL_R_PUBLIC_KEY_NOT_RSA); 1093 goto err; 1094 } 1095 1096 if (!ssl_set_peer_cert_type(sc,SSL2_CT_X509_CERTIFICATE)) 1097 goto err; 1098 ret=1; 1099err: 1100 sk_X509_free(sk); 1101 X509_free(x509); 1102 EVP_PKEY_free(pkey); 1103 return(ret); 1104 } 1105 1106static int ssl_rsa_public_encrypt(SESS_CERT *sc, int len, unsigned char *from, 1107 unsigned char *to, int padding) 1108 { 1109 EVP_PKEY *pkey=NULL; 1110 int i= -1; 1111 1112 if ((sc == NULL) || (sc->peer_key->x509 == NULL) || 1113 ((pkey=X509_get_pubkey(sc->peer_key->x509)) == NULL)) 1114 { 1115 SSLerr(SSL_F_SSL_RSA_PUBLIC_ENCRYPT,SSL_R_NO_PUBLICKEY); 1116 return(-1); 1117 } 1118 if (pkey->type != EVP_PKEY_RSA) 1119 { 1120 SSLerr(SSL_F_SSL_RSA_PUBLIC_ENCRYPT,SSL_R_PUBLIC_KEY_IS_NOT_RSA); 1121 goto end; 1122 } 1123 1124 /* we have the public key */ 1125 i=RSA_public_encrypt(len,from,to,pkey->pkey.rsa,padding); 1126 if (i < 0) 1127 SSLerr(SSL_F_SSL_RSA_PUBLIC_ENCRYPT,ERR_R_RSA_LIB); 1128end: 1129 EVP_PKEY_free(pkey); 1130 return(i); 1131 } 1132#else /* !OPENSSL_NO_SSL2 */ 1133 1134# if PEDANTIC 1135static void *dummy=&dummy; 1136# endif 1137 1138#endif 1139