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 120static SSL_METHOD *ssl2_get_client_method(int ver); 121static int get_server_finished(SSL *s); 122static int get_server_verify(SSL *s); 123static int get_server_hello(SSL *s); 124static int client_hello(SSL *s); 125static int client_master_key(SSL *s); 126static int client_finished(SSL *s); 127static int client_certificate(SSL *s); 128static int ssl_rsa_public_encrypt(SESS_CERT *sc, int len, unsigned char *from, 129 unsigned char *to,int padding); 130#define BREAK break 131 132static SSL_METHOD *ssl2_get_client_method(int ver) 133 { 134 if (ver == SSL2_VERSION) 135 return(SSLv2_client_method()); 136 else 137 return(NULL); 138 } 139 140SSL_METHOD *SSLv2_client_method(void) 141 { 142 static int init=1; 143 static SSL_METHOD SSLv2_client_data; 144 145 if (init) 146 { 147 CRYPTO_w_lock(CRYPTO_LOCK_SSL_METHOD); 148 149 if (init) 150 { 151 memcpy((char *)&SSLv2_client_data,(char *)sslv2_base_method(), 152 sizeof(SSL_METHOD)); 153 SSLv2_client_data.ssl_connect=ssl2_connect; 154 SSLv2_client_data.get_ssl_method=ssl2_get_client_method; 155 init=0; 156 } 157 158 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_METHOD); 159 } 160 return(&SSLv2_client_data); 161 } 162 163int ssl2_connect(SSL *s) 164 { 165 unsigned long l=time(NULL); 166 BUF_MEM *buf=NULL; 167 int ret= -1; 168 void (*cb)(const SSL *ssl,int type,int val)=NULL; 169 int new_state,state; 170 171 RAND_add(&l,sizeof(l),0); 172 ERR_clear_error(); 173 clear_sys_error(); 174 175 if (s->info_callback != NULL) 176 cb=s->info_callback; 177 else if (s->ctx->info_callback != NULL) 178 cb=s->ctx->info_callback; 179 180 /* init things to blank */ 181 s->in_handshake++; 182 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); 183 184 for (;;) 185 { 186 state=s->state; 187 188 switch (s->state) 189 { 190 case SSL_ST_BEFORE: 191 case SSL_ST_CONNECT: 192 case SSL_ST_BEFORE|SSL_ST_CONNECT: 193 case SSL_ST_OK|SSL_ST_CONNECT: 194 195 s->server=0; 196 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1); 197 198 s->version=SSL2_VERSION; 199 s->type=SSL_ST_CONNECT; 200 201 buf=s->init_buf; 202 if ((buf == NULL) && ((buf=BUF_MEM_new()) == NULL)) 203 { 204 ret= -1; 205 goto end; 206 } 207 if (!BUF_MEM_grow(buf, 208 SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)) 209 { 210 if (buf == s->init_buf) 211 buf=NULL; 212 ret= -1; 213 goto end; 214 } 215 s->init_buf=buf; 216 buf=NULL; 217 s->init_num=0; 218 s->state=SSL2_ST_SEND_CLIENT_HELLO_A; 219 s->ctx->stats.sess_connect++; 220 s->handshake_func=ssl2_connect; 221 BREAK; 222 223 case SSL2_ST_SEND_CLIENT_HELLO_A: 224 case SSL2_ST_SEND_CLIENT_HELLO_B: 225 s->shutdown=0; 226 ret=client_hello(s); 227 if (ret <= 0) goto end; 228 s->init_num=0; 229 s->state=SSL2_ST_GET_SERVER_HELLO_A; 230 BREAK; 231 232 case SSL2_ST_GET_SERVER_HELLO_A: 233 case SSL2_ST_GET_SERVER_HELLO_B: 234 ret=get_server_hello(s); 235 if (ret <= 0) goto end; 236 s->init_num=0; 237 if (!s->hit) /* new session */ 238 { 239 s->state=SSL2_ST_SEND_CLIENT_MASTER_KEY_A; 240 BREAK; 241 } 242 else 243 { 244 s->state=SSL2_ST_CLIENT_START_ENCRYPTION; 245 break; 246 } 247 248 case SSL2_ST_SEND_CLIENT_MASTER_KEY_A: 249 case SSL2_ST_SEND_CLIENT_MASTER_KEY_B: 250 ret=client_master_key(s); 251 if (ret <= 0) goto end; 252 s->init_num=0; 253 s->state=SSL2_ST_CLIENT_START_ENCRYPTION; 254 break; 255 256 case SSL2_ST_CLIENT_START_ENCRYPTION: 257 /* Ok, we now have all the stuff needed to 258 * start encrypting, so lets fire it up :-) */ 259 if (!ssl2_enc_init(s,1)) 260 { 261 ret= -1; 262 goto end; 263 } 264 s->s2->clear_text=0; 265 s->state=SSL2_ST_SEND_CLIENT_FINISHED_A; 266 break; 267 268 case SSL2_ST_SEND_CLIENT_FINISHED_A: 269 case SSL2_ST_SEND_CLIENT_FINISHED_B: 270 ret=client_finished(s); 271 if (ret <= 0) goto end; 272 s->init_num=0; 273 s->state=SSL2_ST_GET_SERVER_VERIFY_A; 274 break; 275 276 case SSL2_ST_GET_SERVER_VERIFY_A: 277 case SSL2_ST_GET_SERVER_VERIFY_B: 278 ret=get_server_verify(s); 279 if (ret <= 0) goto end; 280 s->init_num=0; 281 s->state=SSL2_ST_GET_SERVER_FINISHED_A; 282 break; 283 284 case SSL2_ST_GET_SERVER_FINISHED_A: 285 case SSL2_ST_GET_SERVER_FINISHED_B: 286 ret=get_server_finished(s); 287 if (ret <= 0) goto end; 288 break; 289 290 case SSL2_ST_SEND_CLIENT_CERTIFICATE_A: 291 case SSL2_ST_SEND_CLIENT_CERTIFICATE_B: 292 case SSL2_ST_SEND_CLIENT_CERTIFICATE_C: 293 case SSL2_ST_SEND_CLIENT_CERTIFICATE_D: 294 case SSL2_ST_X509_GET_CLIENT_CERTIFICATE: 295 ret=client_certificate(s); 296 if (ret <= 0) goto end; 297 s->init_num=0; 298 s->state=SSL2_ST_GET_SERVER_FINISHED_A; 299 break; 300 301 case SSL_ST_OK: 302 if (s->init_buf != NULL) 303 { 304 BUF_MEM_free(s->init_buf); 305 s->init_buf=NULL; 306 } 307 s->init_num=0; 308 /* ERR_clear_error();*/ 309 310 /* If we want to cache session-ids in the client 311 * and we successfully add the session-id to the 312 * cache, and there is a callback, then pass it out. 313 * 26/11/96 - eay - only add if not a re-used session. 314 */ 315 316 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT); 317 if (s->hit) s->ctx->stats.sess_hit++; 318 319 ret=1; 320 /* s->server=0; */ 321 s->ctx->stats.sess_connect_good++; 322 323 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1); 324 325 goto end; 326 /* break; */ 327 default: 328 SSLerr(SSL_F_SSL2_CONNECT,SSL_R_UNKNOWN_STATE); 329 return(-1); 330 /* break; */ 331 } 332 333 if ((cb != NULL) && (s->state != state)) 334 { 335 new_state=s->state; 336 s->state=state; 337 cb(s,SSL_CB_CONNECT_LOOP,1); 338 s->state=new_state; 339 } 340 } 341end: 342 s->in_handshake--; 343 if (buf != NULL) 344 BUF_MEM_free(buf); 345 if (cb != NULL) 346 cb(s,SSL_CB_CONNECT_EXIT,ret); 347 return(ret); 348 } 349 350static int get_server_hello(SSL *s) 351 { 352 unsigned char *buf; 353 unsigned char *p; 354 int i,j; 355 unsigned long len; 356 STACK_OF(SSL_CIPHER) *sk=NULL,*cl, *prio, *allow; 357 358 buf=(unsigned char *)s->init_buf->data; 359 p=buf; 360 if (s->state == SSL2_ST_GET_SERVER_HELLO_A) 361 { 362 i=ssl2_read(s,(char *)&(buf[s->init_num]),11-s->init_num); 363 if (i < (11-s->init_num)) 364 return(ssl2_part_read(s,SSL_F_GET_SERVER_HELLO,i)); 365 s->init_num = 11; 366 367 if (*(p++) != SSL2_MT_SERVER_HELLO) 368 { 369 if (p[-1] != SSL2_MT_ERROR) 370 { 371 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); 372 SSLerr(SSL_F_GET_SERVER_HELLO, 373 SSL_R_READ_WRONG_PACKET_TYPE); 374 } 375 else 376 SSLerr(SSL_F_GET_SERVER_HELLO, 377 SSL_R_PEER_ERROR); 378 return(-1); 379 } 380#ifdef __APPLE_CC__ 381 /* The Rhapsody 5.5 (a.k.a. MacOS X) compiler bug 382 * workaround. <appro@fy.chalmers.se> */ 383 s->hit=(i=*(p++))?1:0; 384#else 385 s->hit=(*(p++))?1:0; 386#endif 387 s->s2->tmp.cert_type= *(p++); 388 n2s(p,i); 389 if (i < s->version) s->version=i; 390 n2s(p,i); s->s2->tmp.cert_length=i; 391 n2s(p,i); s->s2->tmp.csl=i; 392 n2s(p,i); s->s2->tmp.conn_id_length=i; 393 s->state=SSL2_ST_GET_SERVER_HELLO_B; 394 } 395 396 /* SSL2_ST_GET_SERVER_HELLO_B */ 397 len = 11 + (unsigned long)s->s2->tmp.cert_length + (unsigned long)s->s2->tmp.csl + (unsigned long)s->s2->tmp.conn_id_length; 398 if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER) 399 { 400 SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_MESSAGE_TOO_LONG); 401 return -1; 402 } 403 j = (int)len - s->init_num; 404 i = ssl2_read(s,(char *)&(buf[s->init_num]),j); 405 if (i != j) return(ssl2_part_read(s,SSL_F_GET_SERVER_HELLO,i)); 406 if (s->msg_callback) 407 s->msg_callback(0, s->version, 0, buf, (size_t)len, s, s->msg_callback_arg); /* SERVER-HELLO */ 408 409 /* things are looking good */ 410 411 p = buf + 11; 412 if (s->hit) 413 { 414 if (s->s2->tmp.cert_length != 0) 415 { 416 SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_REUSE_CERT_LENGTH_NOT_ZERO); 417 return(-1); 418 } 419 if (s->s2->tmp.cert_type != 0) 420 { 421 if (!(s->options & 422 SSL_OP_SSLREF2_REUSE_CERT_TYPE_BUG)) 423 { 424 SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_REUSE_CERT_TYPE_NOT_ZERO); 425 return(-1); 426 } 427 } 428 if (s->s2->tmp.csl != 0) 429 { 430 SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_REUSE_CIPHER_LIST_NOT_ZERO); 431 return(-1); 432 } 433 } 434 else 435 { 436#ifdef undef 437 /* very bad */ 438 memset(s->session->session_id,0, 439 SSL_MAX_SSL_SESSION_ID_LENGTH_IN_BYTES); 440 s->session->session_id_length=0; 441 */ 442#endif 443 444 /* we need to do this in case we were trying to reuse a 445 * client session but others are already reusing it. 446 * If this was a new 'blank' session ID, the session-id 447 * length will still be 0 */ 448 if (s->session->session_id_length > 0) 449 { 450 if (!ssl_get_new_session(s,0)) 451 { 452 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); 453 return(-1); 454 } 455 } 456 457 if (ssl2_set_certificate(s,s->s2->tmp.cert_type, 458 s->s2->tmp.cert_length,p) <= 0) 459 { 460 ssl2_return_error(s,SSL2_PE_BAD_CERTIFICATE); 461 return(-1); 462 } 463 p+=s->s2->tmp.cert_length; 464 465 if (s->s2->tmp.csl == 0) 466 { 467 ssl2_return_error(s,SSL2_PE_NO_CIPHER); 468 SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_NO_CIPHER_LIST); 469 return(-1); 470 } 471 472 /* We have just received a list of ciphers back from the 473 * server. We need to get the ones that match, then select 474 * the one we want the most :-). */ 475 476 /* load the ciphers */ 477 sk=ssl_bytes_to_cipher_list(s,p,s->s2->tmp.csl, 478 &s->session->ciphers); 479 p+=s->s2->tmp.csl; 480 if (sk == NULL) 481 { 482 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); 483 SSLerr(SSL_F_GET_SERVER_HELLO,ERR_R_MALLOC_FAILURE); 484 return(-1); 485 } 486 487 sk_SSL_CIPHER_set_cmp_func(sk,ssl_cipher_ptr_id_cmp); 488 489 /* get the array of ciphers we will accept */ 490 cl=SSL_get_ciphers(s); 491 sk_SSL_CIPHER_set_cmp_func(cl,ssl_cipher_ptr_id_cmp); 492 493 /* 494 * If server preference flag set, choose the first 495 * (highest priority) cipher the server sends, otherwise 496 * client preference has priority. 497 */ 498 if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE) 499 { 500 prio = sk; 501 allow = cl; 502 } 503 else 504 { 505 prio = cl; 506 allow = sk; 507 } 508 /* In theory we could have ciphers sent back that we 509 * don't want to use but that does not matter since we 510 * will check against the list we originally sent and 511 * for performance reasons we should not bother to match 512 * the two lists up just to check. */ 513 for (i=0; i<sk_SSL_CIPHER_num(prio); i++) 514 { 515 if (sk_SSL_CIPHER_find(allow, 516 sk_SSL_CIPHER_value(prio,i)) >= 0) 517 break; 518 } 519 520 if (i >= sk_SSL_CIPHER_num(prio)) 521 { 522 ssl2_return_error(s,SSL2_PE_NO_CIPHER); 523 SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_NO_CIPHER_MATCH); 524 return(-1); 525 } 526 s->session->cipher=sk_SSL_CIPHER_value(prio,i); 527 528 529 if (s->session->peer != NULL) /* can't happen*/ 530 { 531 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); 532 SSLerr(SSL_F_GET_SERVER_HELLO, ERR_R_INTERNAL_ERROR); 533 return(-1); 534 } 535 536 s->session->peer = s->session->sess_cert->peer_key->x509; 537 /* peer_key->x509 has been set by ssl2_set_certificate. */ 538 CRYPTO_add(&s->session->peer->references, 1, CRYPTO_LOCK_X509); 539 } 540 541 if (s->session->peer != s->session->sess_cert->peer_key->x509) 542 /* can't happen */ 543 { 544 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); 545 SSLerr(SSL_F_GET_SERVER_HELLO, ERR_R_INTERNAL_ERROR); 546 return(-1); 547 } 548 549 s->s2->conn_id_length=s->s2->tmp.conn_id_length; 550 if (s->s2->conn_id_length > sizeof s->s2->conn_id) 551 { 552 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); 553 SSLerr(SSL_F_GET_SERVER_HELLO, SSL_R_SSL2_CONNECTION_ID_TOO_LONG); 554 return -1; 555 } 556 memcpy(s->s2->conn_id,p,s->s2->tmp.conn_id_length); 557 return(1); 558 } 559 560static int client_hello(SSL *s) 561 { 562 unsigned char *buf; 563 unsigned char *p,*d; 564/* CIPHER **cipher;*/ 565 int i,n,j; 566 567 buf=(unsigned char *)s->init_buf->data; 568 if (s->state == SSL2_ST_SEND_CLIENT_HELLO_A) 569 { 570 if ((s->session == NULL) || 571 (s->session->ssl_version != s->version)) 572 { 573 if (!ssl_get_new_session(s,0)) 574 { 575 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); 576 return(-1); 577 } 578 } 579 /* else use the pre-loaded session */ 580 581 p=buf; /* header */ 582 d=p+9; /* data section */ 583 *(p++)=SSL2_MT_CLIENT_HELLO; /* type */ 584 s2n(SSL2_VERSION,p); /* version */ 585 n=j=0; 586 587 n=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),d); 588 d+=n; 589 590 if (n == 0) 591 { 592 SSLerr(SSL_F_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE); 593 return(-1); 594 } 595 596 s2n(n,p); /* cipher spec num bytes */ 597 598 if ((s->session->session_id_length > 0) && 599 (s->session->session_id_length <= 600 SSL2_MAX_SSL_SESSION_ID_LENGTH)) 601 { 602 i=s->session->session_id_length; 603 s2n(i,p); /* session id length */ 604 memcpy(d,s->session->session_id,(unsigned int)i); 605 d+=i; 606 } 607 else 608 { 609 s2n(0,p); 610 } 611 612 s->s2->challenge_length=SSL2_CHALLENGE_LENGTH; 613 s2n(SSL2_CHALLENGE_LENGTH,p); /* challenge length */ 614 /*challenge id data*/ 615 if(RAND_pseudo_bytes(s->s2->challenge,SSL2_CHALLENGE_LENGTH) <= 0) 616 return -1; 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) 665 if(RAND_pseudo_bytes(sess->key_arg,i) <= 0) 666 return -1; 667 668 /* make a master key */ 669 i=EVP_CIPHER_key_length(c); 670 sess->master_key_length=i; 671 if (i > 0) 672 { 673 if (i > sizeof sess->master_key) 674 { 675 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); 676 SSLerr(SSL_F_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR); 677 return -1; 678 } 679 if (RAND_bytes(sess->master_key,i) <= 0) 680 { 681 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); 682 return(-1); 683 } 684 } 685 686 if (sess->cipher->algorithm2 & SSL2_CF_8_BYTE_ENC) 687 enc=8; 688 else if (SSL_C_IS_EXPORT(sess->cipher)) 689 enc=5; 690 else 691 enc=i; 692 693 if (i < enc) 694 { 695 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); 696 SSLerr(SSL_F_CLIENT_MASTER_KEY,SSL_R_CIPHER_TABLE_SRC_ERROR); 697 return(-1); 698 } 699 clear=i-enc; 700 s2n(clear,p); 701 memcpy(d,sess->master_key,(unsigned int)clear); 702 d+=clear; 703 704 enc=ssl_rsa_public_encrypt(sess->sess_cert,enc, 705 &(sess->master_key[clear]),d, 706 (s->s2->ssl2_rollback)?RSA_SSLV23_PADDING:RSA_PKCS1_PADDING); 707 if (enc <= 0) 708 { 709 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); 710 SSLerr(SSL_F_CLIENT_MASTER_KEY,SSL_R_PUBLIC_KEY_ENCRYPT_ERROR); 711 return(-1); 712 } 713#ifdef PKCS1_CHECK 714 if (s->options & SSL_OP_PKCS1_CHECK_1) d[1]++; 715 if (s->options & SSL_OP_PKCS1_CHECK_2) 716 sess->master_key[clear]++; 717#endif 718 s2n(enc,p); 719 d+=enc; 720 karg=sess->key_arg_length; 721 s2n(karg,p); /* key arg size */ 722 if (karg > sizeof sess->key_arg) 723 { 724 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); 725 SSLerr(SSL_F_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR); 726 return -1; 727 } 728 memcpy(d,sess->key_arg,(unsigned int)karg); 729 d+=karg; 730 731 s->state=SSL2_ST_SEND_CLIENT_MASTER_KEY_B; 732 s->init_num=d-buf; 733 s->init_off=0; 734 } 735 736 /* SSL2_ST_SEND_CLIENT_MASTER_KEY_B */ 737 return(ssl2_do_write(s)); 738 } 739 740static int client_finished(SSL *s) 741 { 742 unsigned char *p; 743 744 if (s->state == SSL2_ST_SEND_CLIENT_FINISHED_A) 745 { 746 p=(unsigned char *)s->init_buf->data; 747 *(p++)=SSL2_MT_CLIENT_FINISHED; 748 if (s->s2->conn_id_length > sizeof s->s2->conn_id) 749 { 750 SSLerr(SSL_F_CLIENT_FINISHED, ERR_R_INTERNAL_ERROR); 751 return -1; 752 } 753 memcpy(p,s->s2->conn_id,(unsigned int)s->s2->conn_id_length); 754 755 s->state=SSL2_ST_SEND_CLIENT_FINISHED_B; 756 s->init_num=s->s2->conn_id_length+1; 757 s->init_off=0; 758 } 759 return(ssl2_do_write(s)); 760 } 761 762/* read the data and then respond */ 763static int client_certificate(SSL *s) 764 { 765 unsigned char *buf; 766 unsigned char *p,*d; 767 int i; 768 unsigned int n; 769 int cert_ch_len; 770 unsigned char *cert_ch; 771 772 buf=(unsigned char *)s->init_buf->data; 773 774 /* We have a cert associated with the SSL, so attach it to 775 * the session if it does not have one */ 776 777 if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_A) 778 { 779 i=ssl2_read(s,(char *)&(buf[s->init_num]), 780 SSL2_MAX_CERT_CHALLENGE_LENGTH+2-s->init_num); 781 if (i<(SSL2_MIN_CERT_CHALLENGE_LENGTH+2-s->init_num)) 782 return(ssl2_part_read(s,SSL_F_CLIENT_CERTIFICATE,i)); 783 s->init_num += i; 784 if (s->msg_callback) 785 s->msg_callback(0, s->version, 0, buf, (size_t)s->init_num, s, s->msg_callback_arg); /* REQUEST-CERTIFICATE */ 786 787 /* type=buf[0]; */ 788 /* type eq x509 */ 789 if (buf[1] != SSL2_AT_MD5_WITH_RSA_ENCRYPTION) 790 { 791 ssl2_return_error(s,SSL2_PE_UNSUPPORTED_CERTIFICATE_TYPE); 792 SSLerr(SSL_F_CLIENT_CERTIFICATE,SSL_R_BAD_AUTHENTICATION_TYPE); 793 return(-1); 794 } 795 796 if ((s->cert == NULL) || 797 (s->cert->key->x509 == NULL) || 798 (s->cert->key->privatekey == NULL)) 799 { 800 s->state=SSL2_ST_X509_GET_CLIENT_CERTIFICATE; 801 } 802 else 803 s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_C; 804 } 805 806 cert_ch = buf + 2; 807 cert_ch_len = s->init_num - 2; 808 809 if (s->state == SSL2_ST_X509_GET_CLIENT_CERTIFICATE) 810 { 811 X509 *x509=NULL; 812 EVP_PKEY *pkey=NULL; 813 814 /* If we get an error we need to 815 * ssl->rwstate=SSL_X509_LOOKUP; 816 * return(error); 817 * We should then be retried when things are ok and we 818 * can get a cert or not */ 819 820 i=0; 821 if (s->ctx->client_cert_cb != NULL) 822 { 823 i=s->ctx->client_cert_cb(s,&(x509),&(pkey)); 824 } 825 826 if (i < 0) 827 { 828 s->rwstate=SSL_X509_LOOKUP; 829 return(-1); 830 } 831 s->rwstate=SSL_NOTHING; 832 833 if ((i == 1) && (pkey != NULL) && (x509 != NULL)) 834 { 835 s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_C; 836 if ( !SSL_use_certificate(s,x509) || 837 !SSL_use_PrivateKey(s,pkey)) 838 { 839 i=0; 840 } 841 X509_free(x509); 842 EVP_PKEY_free(pkey); 843 } 844 else if (i == 1) 845 { 846 if (x509 != NULL) X509_free(x509); 847 if (pkey != NULL) EVP_PKEY_free(pkey); 848 SSLerr(SSL_F_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); 849 i=0; 850 } 851 852 if (i == 0) 853 { 854 /* We have no client certificate to respond with 855 * so send the correct error message back */ 856 s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_B; 857 p=buf; 858 *(p++)=SSL2_MT_ERROR; 859 s2n(SSL2_PE_NO_CERTIFICATE,p); 860 s->init_off=0; 861 s->init_num=3; 862 /* Write is done at the end */ 863 } 864 } 865 866 if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_B) 867 { 868 return(ssl2_do_write(s)); 869 } 870 871 if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_C) 872 { 873 EVP_MD_CTX ctx; 874 875 /* ok, now we calculate the checksum 876 * do it first so we can reuse buf :-) */ 877 p=buf; 878 EVP_MD_CTX_init(&ctx); 879 EVP_SignInit_ex(&ctx,s->ctx->rsa_md5, NULL); 880 EVP_SignUpdate(&ctx,s->s2->key_material, 881 s->s2->key_material_length); 882 EVP_SignUpdate(&ctx,cert_ch,(unsigned int)cert_ch_len); 883 n=i2d_X509(s->session->sess_cert->peer_key->x509,&p); 884 EVP_SignUpdate(&ctx,buf,(unsigned int)n); 885 886 p=buf; 887 d=p+6; 888 *(p++)=SSL2_MT_CLIENT_CERTIFICATE; 889 *(p++)=SSL2_CT_X509_CERTIFICATE; 890 n=i2d_X509(s->cert->key->x509,&d); 891 s2n(n,p); 892 893 if (!EVP_SignFinal(&ctx,d,&n,s->cert->key->privatekey)) 894 { 895 /* this is not good. If things have failed it 896 * means there so something wrong with the key. 897 * We will continue with a 0 length signature 898 */ 899 } 900 EVP_MD_CTX_cleanup(&ctx); 901 s2n(n,p); 902 d+=n; 903 904 s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_D; 905 s->init_num=d-buf; 906 s->init_off=0; 907 } 908 /* if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_D) */ 909 return(ssl2_do_write(s)); 910 } 911 912static int get_server_verify(SSL *s) 913 { 914 unsigned char *p; 915 int i, n, len; 916 917 p=(unsigned char *)s->init_buf->data; 918 if (s->state == SSL2_ST_GET_SERVER_VERIFY_A) 919 { 920 i=ssl2_read(s,(char *)&(p[s->init_num]),1-s->init_num); 921 if (i < (1-s->init_num)) 922 return(ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i)); 923 s->init_num += i; 924 925 s->state= SSL2_ST_GET_SERVER_VERIFY_B; 926 if (*p != SSL2_MT_SERVER_VERIFY) 927 { 928 if (p[0] != SSL2_MT_ERROR) 929 { 930 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); 931 SSLerr(SSL_F_GET_SERVER_VERIFY, 932 SSL_R_READ_WRONG_PACKET_TYPE); 933 } 934 else 935 { 936 SSLerr(SSL_F_GET_SERVER_VERIFY,SSL_R_PEER_ERROR); 937 /* try to read the error message */ 938 i=ssl2_read(s,(char *)&(p[s->init_num]),3-s->init_num); 939 return ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i); 940 } 941 return(-1); 942 } 943 } 944 945 p=(unsigned char *)s->init_buf->data; 946 len = 1 + s->s2->challenge_length; 947 n = len - s->init_num; 948 i = ssl2_read(s,(char *)&(p[s->init_num]),n); 949 if (i < n) 950 return(ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i)); 951 if (s->msg_callback) 952 s->msg_callback(0, s->version, 0, p, len, s, s->msg_callback_arg); /* SERVER-VERIFY */ 953 p += 1; 954 955 if (memcmp(p,s->s2->challenge,s->s2->challenge_length) != 0) 956 { 957 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); 958 SSLerr(SSL_F_GET_SERVER_VERIFY,SSL_R_CHALLENGE_IS_DIFFERENT); 959 return(-1); 960 } 961 return(1); 962 } 963 964static int get_server_finished(SSL *s) 965 { 966 unsigned char *buf; 967 unsigned char *p; 968 int i, n, len; 969 970 buf=(unsigned char *)s->init_buf->data; 971 p=buf; 972 if (s->state == SSL2_ST_GET_SERVER_FINISHED_A) 973 { 974 i=ssl2_read(s,(char *)&(buf[s->init_num]),1-s->init_num); 975 if (i < (1-s->init_num)) 976 return(ssl2_part_read(s,SSL_F_GET_SERVER_FINISHED,i)); 977 s->init_num += i; 978 979 if (*p == SSL2_MT_REQUEST_CERTIFICATE) 980 { 981 s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_A; 982 return(1); 983 } 984 else if (*p != SSL2_MT_SERVER_FINISHED) 985 { 986 if (p[0] != SSL2_MT_ERROR) 987 { 988 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); 989 SSLerr(SSL_F_GET_SERVER_FINISHED,SSL_R_READ_WRONG_PACKET_TYPE); 990 } 991 else 992 { 993 SSLerr(SSL_F_GET_SERVER_FINISHED,SSL_R_PEER_ERROR); 994 /* try to read the error message */ 995 i=ssl2_read(s,(char *)&(p[s->init_num]),3-s->init_num); 996 return ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i); 997 } 998 return(-1); 999 } 1000 s->state=SSL2_ST_GET_SERVER_FINISHED_B; 1001 } 1002 1003 len = 1 + SSL2_SSL_SESSION_ID_LENGTH; 1004 n = len - s->init_num; 1005 i = ssl2_read(s,(char *)&(buf[s->init_num]), n); 1006 if (i < n) /* XXX could be shorter than SSL2_SSL_SESSION_ID_LENGTH, that's the maximum */ 1007 return(ssl2_part_read(s,SSL_F_GET_SERVER_FINISHED,i)); 1008 s->init_num += i; 1009 if (s->msg_callback) 1010 s->msg_callback(0, s->version, 0, buf, (size_t)s->init_num, s, s->msg_callback_arg); /* SERVER-FINISHED */ 1011 1012 if (!s->hit) /* new session */ 1013 { 1014 /* new session-id */ 1015 /* Make sure we were not trying to re-use an old SSL_SESSION 1016 * or bad things can happen */ 1017 /* ZZZZZZZZZZZZZ */ 1018 s->session->session_id_length=SSL2_SSL_SESSION_ID_LENGTH; 1019 memcpy(s->session->session_id,p+1,SSL2_SSL_SESSION_ID_LENGTH); 1020 } 1021 else 1022 { 1023 if (!(s->options & SSL_OP_MICROSOFT_SESS_ID_BUG)) 1024 { 1025 if ((s->session->session_id_length > sizeof s->session->session_id) 1026 || (0 != memcmp(buf + 1, s->session->session_id, 1027 (unsigned int)s->session->session_id_length))) 1028 { 1029 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); 1030 SSLerr(SSL_F_GET_SERVER_FINISHED,SSL_R_SSL_SESSION_ID_IS_DIFFERENT); 1031 return(-1); 1032 } 1033 } 1034 } 1035 s->state = SSL_ST_OK; 1036 return(1); 1037 } 1038 1039/* loads in the certificate from the server */ 1040int ssl2_set_certificate(SSL *s, int type, int len, unsigned char *data) 1041 { 1042 STACK_OF(X509) *sk=NULL; 1043 EVP_PKEY *pkey=NULL; 1044 SESS_CERT *sc=NULL; 1045 int i; 1046 X509 *x509=NULL; 1047 int ret=0; 1048 1049 x509=d2i_X509(NULL,&data,(long)len); 1050 if (x509 == NULL) 1051 { 1052 SSLerr(SSL_F_SSL2_SET_CERTIFICATE,ERR_R_X509_LIB); 1053 goto err; 1054 } 1055 1056 if ((sk=sk_X509_new_null()) == NULL || !sk_X509_push(sk,x509)) 1057 { 1058 SSLerr(SSL_F_SSL2_SET_CERTIFICATE,ERR_R_MALLOC_FAILURE); 1059 goto err; 1060 } 1061 1062 i=ssl_verify_cert_chain(s,sk); 1063 1064 if ((s->verify_mode != SSL_VERIFY_NONE) && (!i)) 1065 { 1066 SSLerr(SSL_F_SSL2_SET_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED); 1067 goto err; 1068 } 1069 ERR_clear_error(); /* but we keep s->verify_result */ 1070 s->session->verify_result = s->verify_result; 1071 1072 /* server's cert for this session */ 1073 sc=ssl_sess_cert_new(); 1074 if (sc == NULL) 1075 { 1076 ret= -1; 1077 goto err; 1078 } 1079 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert); 1080 s->session->sess_cert=sc; 1081 1082 sc->peer_pkeys[SSL_PKEY_RSA_ENC].x509=x509; 1083 sc->peer_key= &(sc->peer_pkeys[SSL_PKEY_RSA_ENC]); 1084 1085 pkey=X509_get_pubkey(x509); 1086 x509=NULL; 1087 if (pkey == NULL) 1088 { 1089 SSLerr(SSL_F_SSL2_SET_CERTIFICATE,SSL_R_UNABLE_TO_EXTRACT_PUBLIC_KEY); 1090 goto err; 1091 } 1092 if (pkey->type != EVP_PKEY_RSA) 1093 { 1094 SSLerr(SSL_F_SSL2_SET_CERTIFICATE,SSL_R_PUBLIC_KEY_NOT_RSA); 1095 goto err; 1096 } 1097 1098 if (!ssl_set_peer_cert_type(sc,SSL2_CT_X509_CERTIFICATE)) 1099 goto err; 1100 ret=1; 1101err: 1102 sk_X509_free(sk); 1103 X509_free(x509); 1104 EVP_PKEY_free(pkey); 1105 return(ret); 1106 } 1107 1108static int ssl_rsa_public_encrypt(SESS_CERT *sc, int len, unsigned char *from, 1109 unsigned char *to, int padding) 1110 { 1111 EVP_PKEY *pkey=NULL; 1112 int i= -1; 1113 1114 if ((sc == NULL) || (sc->peer_key->x509 == NULL) || 1115 ((pkey=X509_get_pubkey(sc->peer_key->x509)) == NULL)) 1116 { 1117 SSLerr(SSL_F_SSL_RSA_PUBLIC_ENCRYPT,SSL_R_NO_PUBLICKEY); 1118 return(-1); 1119 } 1120 if (pkey->type != EVP_PKEY_RSA) 1121 { 1122 SSLerr(SSL_F_SSL_RSA_PUBLIC_ENCRYPT,SSL_R_PUBLIC_KEY_IS_NOT_RSA); 1123 goto end; 1124 } 1125 1126 /* we have the public key */ 1127 i=RSA_public_encrypt(len,from,to,pkey->pkey.rsa,padding); 1128 if (i < 0) 1129 SSLerr(SSL_F_SSL_RSA_PUBLIC_ENCRYPT,ERR_R_RSA_LIB); 1130end: 1131 EVP_PKEY_free(pkey); 1132 return(i); 1133 } 1134#else /* !OPENSSL_NO_SSL2 */ 1135 1136# if PEDANTIC 1137static void *dummy=&dummy; 1138# endif 1139 1140#endif 1141