1 /* ssl/s2_clnt.c */ 2 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay (at) 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 (at) 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 (at) 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 (at) 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 (at) 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 (at) cryptsoft.com). This product includes software written by Tim 108 * Hudson (tjh (at) 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> 119 120 static const SSL_METHOD *ssl2_get_client_method(int ver); 121 static int get_server_finished(SSL *s); 122 static int get_server_verify(SSL *s); 123 static int get_server_hello(SSL *s); 124 static int client_hello(SSL *s); 125 static int client_master_key(SSL *s); 126 static int client_finished(SSL *s); 127 static int client_certificate(SSL *s); 128 static int ssl_rsa_public_encrypt(SESS_CERT *sc, int len, unsigned char *from, 129 unsigned char *to,int padding); 130 #define BREAK break 131 132 static const 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 } 139 140 IMPLEMENT_ssl2_meth_func(SSLv2_client_method, 141 ssl_undefined_function, 142 ssl2_connect, 143 ssl2_get_client_method) 144 145 int ssl2_connect(SSL *s) 146 { 147 unsigned long l=(unsigned long)time(NULL); 148 BUF_MEM *buf=NULL; 149 int ret= -1; 150 void (*cb)(const SSL *ssl,int type,int val)=NULL; 151 int new_state,state; 152 153 RAND_add(&l,sizeof(l),0); 154 ERR_clear_error(); 155 clear_sys_error(); 156 157 if (s->info_callback != NULL) 158 cb=s->info_callback; 159 else if (s->ctx->info_callback != NULL) 160 cb=s->ctx->info_callback; 161 162 /* init things to blank */ 163 s->in_handshake++; 164 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); 165 166 for (;;) 167 { 168 state=s->state; 169 170 switch (s->state) 171 { 172 case SSL_ST_BEFORE: 173 case SSL_ST_CONNECT: 174 case SSL_ST_BEFORE|SSL_ST_CONNECT: 175 case SSL_ST_OK|SSL_ST_CONNECT: 176 177 s->server=0; 178 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1); 179 180 s->version=SSL2_VERSION; 181 s->type=SSL_ST_CONNECT; 182 183 buf=s->init_buf; 184 if ((buf == NULL) && ((buf=BUF_MEM_new()) == NULL)) 185 { 186 ret= -1; 187 goto end; 188 } 189 if (!BUF_MEM_grow(buf, 190 SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)) 191 { 192 if (buf == s->init_buf) 193 buf=NULL; 194 ret= -1; 195 goto end; 196 } 197 s->init_buf=buf; 198 buf=NULL; 199 s->init_num=0; 200 s->state=SSL2_ST_SEND_CLIENT_HELLO_A; 201 s->ctx->stats.sess_connect++; 202 s->handshake_func=ssl2_connect; 203 BREAK; 204 205 case SSL2_ST_SEND_CLIENT_HELLO_A: 206 case SSL2_ST_SEND_CLIENT_HELLO_B: 207 s->shutdown=0; 208 ret=client_hello(s); 209 if (ret <= 0) goto end; 210 s->init_num=0; 211 s->state=SSL2_ST_GET_SERVER_HELLO_A; 212 BREAK; 213 214 case SSL2_ST_GET_SERVER_HELLO_A: 215 case SSL2_ST_GET_SERVER_HELLO_B: 216 ret=get_server_hello(s); 217 if (ret <= 0) goto end; 218 s->init_num=0; 219 if (!s->hit) /* new session */ 220 { 221 s->state=SSL2_ST_SEND_CLIENT_MASTER_KEY_A; 222 BREAK; 223 } 224 else 225 { 226 s->state=SSL2_ST_CLIENT_START_ENCRYPTION; 227 break; 228 } 229 230 case SSL2_ST_SEND_CLIENT_MASTER_KEY_A: 231 case SSL2_ST_SEND_CLIENT_MASTER_KEY_B: 232 ret=client_master_key(s); 233 if (ret <= 0) goto end; 234 s->init_num=0; 235 s->state=SSL2_ST_CLIENT_START_ENCRYPTION; 236 break; 237 238 case SSL2_ST_CLIENT_START_ENCRYPTION: 239 /* Ok, we now have all the stuff needed to 240 * start encrypting, so lets fire it up :-) */ 241 if (!ssl2_enc_init(s,1)) 242 { 243 ret= -1; 244 goto end; 245 } 246 s->s2->clear_text=0; 247 s->state=SSL2_ST_SEND_CLIENT_FINISHED_A; 248 break; 249 250 case SSL2_ST_SEND_CLIENT_FINISHED_A: 251 case SSL2_ST_SEND_CLIENT_FINISHED_B: 252 ret=client_finished(s); 253 if (ret <= 0) goto end; 254 s->init_num=0; 255 s->state=SSL2_ST_GET_SERVER_VERIFY_A; 256 break; 257 258 case SSL2_ST_GET_SERVER_VERIFY_A: 259 case SSL2_ST_GET_SERVER_VERIFY_B: 260 ret=get_server_verify(s); 261 if (ret <= 0) goto end; 262 s->init_num=0; 263 s->state=SSL2_ST_GET_SERVER_FINISHED_A; 264 break; 265 266 case SSL2_ST_GET_SERVER_FINISHED_A: 267 case SSL2_ST_GET_SERVER_FINISHED_B: 268 ret=get_server_finished(s); 269 if (ret <= 0) goto end; 270 break; 271 272 case SSL2_ST_SEND_CLIENT_CERTIFICATE_A: 273 case SSL2_ST_SEND_CLIENT_CERTIFICATE_B: 274 case SSL2_ST_SEND_CLIENT_CERTIFICATE_C: 275 case SSL2_ST_SEND_CLIENT_CERTIFICATE_D: 276 case SSL2_ST_X509_GET_CLIENT_CERTIFICATE: 277 ret=client_certificate(s); 278 if (ret <= 0) goto end; 279 s->init_num=0; 280 s->state=SSL2_ST_GET_SERVER_FINISHED_A; 281 break; 282 283 case SSL_ST_OK: 284 if (s->init_buf != NULL) 285 { 286 BUF_MEM_free(s->init_buf); 287 s->init_buf=NULL; 288 } 289 s->init_num=0; 290 /* ERR_clear_error();*/ 291 292 /* If we want to cache session-ids in the client 293 * and we successfully add the session-id to the 294 * cache, and there is a callback, then pass it out. 295 * 26/11/96 - eay - only add if not a re-used session. 296 */ 297 298 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT); 299 if (s->hit) s->ctx->stats.sess_hit++; 300 301 ret=1; 302 /* s->server=0; */ 303 s->ctx->stats.sess_connect_good++; 304 305 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1); 306 307 goto end; 308 /* break; */ 309 default: 310 SSLerr(SSL_F_SSL2_CONNECT,SSL_R_UNKNOWN_STATE); 311 return(-1); 312 /* break; */ 313 } 314 315 if ((cb != NULL) && (s->state != state)) 316 { 317 new_state=s->state; 318 s->state=state; 319 cb(s,SSL_CB_CONNECT_LOOP,1); 320 s->state=new_state; 321 } 322 } 323 end: 324 s->in_handshake--; 325 if (buf != NULL) 326 BUF_MEM_free(buf); 327 if (cb != NULL) 328 cb(s,SSL_CB_CONNECT_EXIT,ret); 329 return(ret); 330 } 331 332 static int get_server_hello(SSL *s) 333 { 334 unsigned char *buf; 335 unsigned char *p; 336 int i,j; 337 unsigned long len; 338 STACK_OF(SSL_CIPHER) *sk=NULL,*cl, *prio, *allow; 339 340 buf=(unsigned char *)s->init_buf->data; 341 p=buf; 342 if (s->state == SSL2_ST_GET_SERVER_HELLO_A) 343 { 344 i=ssl2_read(s,(char *)&(buf[s->init_num]),11-s->init_num); 345 if (i < (11-s->init_num)) 346 return(ssl2_part_read(s,SSL_F_GET_SERVER_HELLO,i)); 347 s->init_num = 11; 348 349 if (*(p++) != SSL2_MT_SERVER_HELLO) 350 { 351 if (p[-1] != SSL2_MT_ERROR) 352 { 353 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); 354 SSLerr(SSL_F_GET_SERVER_HELLO, 355 SSL_R_READ_WRONG_PACKET_TYPE); 356 } 357 else 358 SSLerr(SSL_F_GET_SERVER_HELLO, 359 SSL_R_PEER_ERROR); 360 return(-1); 361 } 362 #ifdef __APPLE_CC__ 363 /* The Rhapsody 5.5 (a.k.a. MacOS X) compiler bug 364 * workaround. <appro (at) fy.chalmers.se> */ 365 s->hit=(i=*(p++))?1:0; 366 #else 367 s->hit=(*(p++))?1:0; 368 #endif 369 s->s2->tmp.cert_type= *(p++); 370 n2s(p,i); 371 if (i < s->version) s->version=i; 372 n2s(p,i); s->s2->tmp.cert_length=i; 373 n2s(p,i); s->s2->tmp.csl=i; 374 n2s(p,i); s->s2->tmp.conn_id_length=i; 375 s->state=SSL2_ST_GET_SERVER_HELLO_B; 376 } 377 378 /* SSL2_ST_GET_SERVER_HELLO_B */ 379 len = 11 + (unsigned long)s->s2->tmp.cert_length + (unsigned long)s->s2->tmp.csl + (unsigned long)s->s2->tmp.conn_id_length; 380 if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER) 381 { 382 SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_MESSAGE_TOO_LONG); 383 return -1; 384 } 385 j = (int)len - s->init_num; 386 i = ssl2_read(s,(char *)&(buf[s->init_num]),j); 387 if (i != j) return(ssl2_part_read(s,SSL_F_GET_SERVER_HELLO,i)); 388 if (s->msg_callback) 389 s->msg_callback(0, s->version, 0, buf, (size_t)len, s, s->msg_callback_arg); /* SERVER-HELLO */ 390 391 /* things are looking good */ 392 393 p = buf + 11; 394 if (s->hit) 395 { 396 if (s->s2->tmp.cert_length != 0) 397 { 398 SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_REUSE_CERT_LENGTH_NOT_ZERO); 399 return(-1); 400 } 401 if (s->s2->tmp.cert_type != 0) 402 { 403 if (!(s->options & 404 SSL_OP_SSLREF2_REUSE_CERT_TYPE_BUG)) 405 { 406 SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_REUSE_CERT_TYPE_NOT_ZERO); 407 return(-1); 408 } 409 } 410 if (s->s2->tmp.csl != 0) 411 { 412 SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_REUSE_CIPHER_LIST_NOT_ZERO); 413 return(-1); 414 } 415 } 416 else 417 { 418 #ifdef undef 419 /* very bad */ 420 memset(s->session->session_id,0, 421 SSL_MAX_SSL_SESSION_ID_LENGTH_IN_BYTES); 422 s->session->session_id_length=0; 423 */ 424 #endif 425 426 /* we need to do this in case we were trying to reuse a 427 * client session but others are already reusing it. 428 * If this was a new 'blank' session ID, the session-id 429 * length will still be 0 */ 430 if (s->session->session_id_length > 0) 431 { 432 if (!ssl_get_new_session(s,0)) 433 { 434 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); 435 return(-1); 436 } 437 } 438 439 if (ssl2_set_certificate(s,s->s2->tmp.cert_type, 440 s->s2->tmp.cert_length,p) <= 0) 441 { 442 ssl2_return_error(s,SSL2_PE_BAD_CERTIFICATE); 443 return(-1); 444 } 445 p+=s->s2->tmp.cert_length; 446 447 if (s->s2->tmp.csl == 0) 448 { 449 ssl2_return_error(s,SSL2_PE_NO_CIPHER); 450 SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_NO_CIPHER_LIST); 451 return(-1); 452 } 453 454 /* We have just received a list of ciphers back from the 455 * server. We need to get the ones that match, then select 456 * the one we want the most :-). */ 457 458 /* load the ciphers */ 459 sk=ssl_bytes_to_cipher_list(s,p,s->s2->tmp.csl, 460 &s->session->ciphers); 461 p+=s->s2->tmp.csl; 462 if (sk == NULL) 463 { 464 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); 465 SSLerr(SSL_F_GET_SERVER_HELLO,ERR_R_MALLOC_FAILURE); 466 return(-1); 467 } 468 469 (void)sk_SSL_CIPHER_set_cmp_func(sk,ssl_cipher_ptr_id_cmp); 470 471 /* get the array of ciphers we will accept */ 472 cl=SSL_get_ciphers(s); 473 (void)sk_SSL_CIPHER_set_cmp_func(cl,ssl_cipher_ptr_id_cmp); 474 475 /* 476 * If server preference flag set, choose the first 477 * (highest priority) cipher the server sends, otherwise 478 * client preference has priority. 479 */ 480 if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE) 481 { 482 prio = sk; 483 allow = cl; 484 } 485 else 486 { 487 prio = cl; 488 allow = sk; 489 } 490 /* In theory we could have ciphers sent back that we 491 * don't want to use but that does not matter since we 492 * will check against the list we originally sent and 493 * for performance reasons we should not bother to match 494 * the two lists up just to check. */ 495 for (i=0; i<sk_SSL_CIPHER_num(prio); i++) 496 { 497 if (sk_SSL_CIPHER_find(allow, 498 sk_SSL_CIPHER_value(prio,i)) >= 0) 499 break; 500 } 501 502 if (i >= sk_SSL_CIPHER_num(prio)) 503 { 504 ssl2_return_error(s,SSL2_PE_NO_CIPHER); 505 SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_NO_CIPHER_MATCH); 506 return(-1); 507 } 508 s->session->cipher=sk_SSL_CIPHER_value(prio,i); 509 510 511 if (s->session->peer != NULL) /* can't happen*/ 512 { 513 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); 514 SSLerr(SSL_F_GET_SERVER_HELLO, ERR_R_INTERNAL_ERROR); 515 return(-1); 516 } 517 518 s->session->peer = s->session->sess_cert->peer_key->x509; 519 /* peer_key->x509 has been set by ssl2_set_certificate. */ 520 CRYPTO_add(&s->session->peer->references, 1, CRYPTO_LOCK_X509); 521 } 522 523 if (s->session->sess_cert == NULL 524 || s->session->peer != s->session->sess_cert->peer_key->x509) 525 /* can't happen */ 526 { 527 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); 528 SSLerr(SSL_F_GET_SERVER_HELLO, ERR_R_INTERNAL_ERROR); 529 return(-1); 530 } 531 532 s->s2->conn_id_length=s->s2->tmp.conn_id_length; 533 if (s->s2->conn_id_length > sizeof s->s2->conn_id) 534 { 535 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); 536 SSLerr(SSL_F_GET_SERVER_HELLO, SSL_R_SSL2_CONNECTION_ID_TOO_LONG); 537 return -1; 538 } 539 memcpy(s->s2->conn_id,p,s->s2->tmp.conn_id_length); 540 return(1); 541 } 542 543 static int client_hello(SSL *s) 544 { 545 unsigned char *buf; 546 unsigned char *p,*d; 547 /* CIPHER **cipher;*/ 548 int i,n,j; 549 550 buf=(unsigned char *)s->init_buf->data; 551 if (s->state == SSL2_ST_SEND_CLIENT_HELLO_A) 552 { 553 if ((s->session == NULL) || 554 (s->session->ssl_version != s->version)) 555 { 556 if (!ssl_get_new_session(s,0)) 557 { 558 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); 559 return(-1); 560 } 561 } 562 /* else use the pre-loaded session */ 563 564 p=buf; /* header */ 565 d=p+9; /* data section */ 566 *(p++)=SSL2_MT_CLIENT_HELLO; /* type */ 567 s2n(SSL2_VERSION,p); /* version */ 568 n=j=0; 569 570 n=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),d,0); 571 d+=n; 572 573 if (n == 0) 574 { 575 SSLerr(SSL_F_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE); 576 return(-1); 577 } 578 579 s2n(n,p); /* cipher spec num bytes */ 580 581 if ((s->session->session_id_length > 0) && 582 (s->session->session_id_length <= 583 SSL2_MAX_SSL_SESSION_ID_LENGTH)) 584 { 585 i=s->session->session_id_length; 586 s2n(i,p); /* session id length */ 587 memcpy(d,s->session->session_id,(unsigned int)i); 588 d+=i; 589 } 590 else 591 { 592 s2n(0,p); 593 } 594 595 s->s2->challenge_length=SSL2_CHALLENGE_LENGTH; 596 s2n(SSL2_CHALLENGE_LENGTH,p); /* challenge length */ 597 /*challenge id data*/ 598 if (RAND_pseudo_bytes(s->s2->challenge,SSL2_CHALLENGE_LENGTH) <= 0) 599 return -1; 600 memcpy(d,s->s2->challenge,SSL2_CHALLENGE_LENGTH); 601 d+=SSL2_CHALLENGE_LENGTH; 602 603 s->state=SSL2_ST_SEND_CLIENT_HELLO_B; 604 s->init_num=d-buf; 605 s->init_off=0; 606 } 607 /* SSL2_ST_SEND_CLIENT_HELLO_B */ 608 return(ssl2_do_write(s)); 609 } 610 611 static int client_master_key(SSL *s) 612 { 613 unsigned char *buf; 614 unsigned char *p,*d; 615 int clear,enc,karg,i; 616 SSL_SESSION *sess; 617 const EVP_CIPHER *c; 618 const EVP_MD *md; 619 620 buf=(unsigned char *)s->init_buf->data; 621 if (s->state == SSL2_ST_SEND_CLIENT_MASTER_KEY_A) 622 { 623 624 if (!ssl_cipher_get_evp(s->session,&c,&md,NULL,NULL,NULL)) 625 { 626 ssl2_return_error(s,SSL2_PE_NO_CIPHER); 627 SSLerr(SSL_F_CLIENT_MASTER_KEY,SSL_R_PROBLEMS_MAPPING_CIPHER_FUNCTIONS); 628 return(-1); 629 } 630 sess=s->session; 631 p=buf; 632 d=p+10; 633 *(p++)=SSL2_MT_CLIENT_MASTER_KEY;/* type */ 634 635 i=ssl_put_cipher_by_char(s,sess->cipher,p); 636 p+=i; 637 638 /* make key_arg data */ 639 i=EVP_CIPHER_iv_length(c); 640 sess->key_arg_length=i; 641 if (i > SSL_MAX_KEY_ARG_LENGTH) 642 { 643 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); 644 SSLerr(SSL_F_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR); 645 return -1; 646 } 647 if (i > 0) 648 if (RAND_pseudo_bytes(sess->key_arg,i) <= 0) 649 return -1; 650 651 /* make a master key */ 652 i=EVP_CIPHER_key_length(c); 653 sess->master_key_length=i; 654 if (i > 0) 655 { 656 if (i > (int)sizeof(sess->master_key)) 657 { 658 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); 659 SSLerr(SSL_F_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR); 660 return -1; 661 } 662 if (RAND_bytes(sess->master_key,i) <= 0) 663 { 664 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); 665 return(-1); 666 } 667 } 668 669 if (sess->cipher->algorithm2 & SSL2_CF_8_BYTE_ENC) 670 enc=8; 671 else if (SSL_C_IS_EXPORT(sess->cipher)) 672 enc=5; 673 else 674 enc=i; 675 676 if ((int)i < enc) 677 { 678 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); 679 SSLerr(SSL_F_CLIENT_MASTER_KEY,SSL_R_CIPHER_TABLE_SRC_ERROR); 680 return(-1); 681 } 682 clear=i-enc; 683 s2n(clear,p); 684 memcpy(d,sess->master_key,(unsigned int)clear); 685 d+=clear; 686 687 enc=ssl_rsa_public_encrypt(sess->sess_cert,enc, 688 &(sess->master_key[clear]),d, 689 (s->s2->ssl2_rollback)?RSA_SSLV23_PADDING:RSA_PKCS1_PADDING); 690 if (enc <= 0) 691 { 692 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); 693 SSLerr(SSL_F_CLIENT_MASTER_KEY,SSL_R_PUBLIC_KEY_ENCRYPT_ERROR); 694 return(-1); 695 } 696 #ifdef PKCS1_CHECK 697 if (s->options & SSL_OP_PKCS1_CHECK_1) d[1]++; 698 if (s->options & SSL_OP_PKCS1_CHECK_2) 699 sess->master_key[clear]++; 700 #endif 701 s2n(enc,p); 702 d+=enc; 703 karg=sess->key_arg_length; 704 s2n(karg,p); /* key arg size */ 705 if (karg > (int)sizeof(sess->key_arg)) 706 { 707 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); 708 SSLerr(SSL_F_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR); 709 return -1; 710 } 711 memcpy(d,sess->key_arg,(unsigned int)karg); 712 d+=karg; 713 714 s->state=SSL2_ST_SEND_CLIENT_MASTER_KEY_B; 715 s->init_num=d-buf; 716 s->init_off=0; 717 } 718 719 /* SSL2_ST_SEND_CLIENT_MASTER_KEY_B */ 720 return(ssl2_do_write(s)); 721 } 722 723 static int client_finished(SSL *s) 724 { 725 unsigned char *p; 726 727 if (s->state == SSL2_ST_SEND_CLIENT_FINISHED_A) 728 { 729 p=(unsigned char *)s->init_buf->data; 730 *(p++)=SSL2_MT_CLIENT_FINISHED; 731 if (s->s2->conn_id_length > sizeof s->s2->conn_id) 732 { 733 SSLerr(SSL_F_CLIENT_FINISHED, ERR_R_INTERNAL_ERROR); 734 return -1; 735 } 736 memcpy(p,s->s2->conn_id,(unsigned int)s->s2->conn_id_length); 737 738 s->state=SSL2_ST_SEND_CLIENT_FINISHED_B; 739 s->init_num=s->s2->conn_id_length+1; 740 s->init_off=0; 741 } 742 return(ssl2_do_write(s)); 743 } 744 745 /* read the data and then respond */ 746 static int client_certificate(SSL *s) 747 { 748 unsigned char *buf; 749 unsigned char *p,*d; 750 int i; 751 unsigned int n; 752 int cert_ch_len; 753 unsigned char *cert_ch; 754 755 buf=(unsigned char *)s->init_buf->data; 756 757 /* We have a cert associated with the SSL, so attach it to 758 * the session if it does not have one */ 759 760 if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_A) 761 { 762 i=ssl2_read(s,(char *)&(buf[s->init_num]), 763 SSL2_MAX_CERT_CHALLENGE_LENGTH+2-s->init_num); 764 if (i<(SSL2_MIN_CERT_CHALLENGE_LENGTH+2-s->init_num)) 765 return(ssl2_part_read(s,SSL_F_CLIENT_CERTIFICATE,i)); 766 s->init_num += i; 767 if (s->msg_callback) 768 s->msg_callback(0, s->version, 0, buf, (size_t)s->init_num, s, s->msg_callback_arg); /* REQUEST-CERTIFICATE */ 769 770 /* type=buf[0]; */ 771 /* type eq x509 */ 772 if (buf[1] != SSL2_AT_MD5_WITH_RSA_ENCRYPTION) 773 { 774 ssl2_return_error(s,SSL2_PE_UNSUPPORTED_CERTIFICATE_TYPE); 775 SSLerr(SSL_F_CLIENT_CERTIFICATE,SSL_R_BAD_AUTHENTICATION_TYPE); 776 return(-1); 777 } 778 779 if ((s->cert == NULL) || 780 (s->cert->key->x509 == NULL) || 781 (s->cert->key->privatekey == NULL)) 782 { 783 s->state=SSL2_ST_X509_GET_CLIENT_CERTIFICATE; 784 } 785 else 786 s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_C; 787 } 788 789 cert_ch = buf + 2; 790 cert_ch_len = s->init_num - 2; 791 792 if (s->state == SSL2_ST_X509_GET_CLIENT_CERTIFICATE) 793 { 794 X509 *x509=NULL; 795 EVP_PKEY *pkey=NULL; 796 797 /* If we get an error we need to 798 * ssl->rwstate=SSL_X509_LOOKUP; 799 * return(error); 800 * We should then be retried when things are ok and we 801 * can get a cert or not */ 802 803 i=0; 804 if (s->ctx->client_cert_cb != NULL) 805 { 806 i=s->ctx->client_cert_cb(s,&(x509),&(pkey)); 807 } 808 809 if (i < 0) 810 { 811 s->rwstate=SSL_X509_LOOKUP; 812 return(-1); 813 } 814 s->rwstate=SSL_NOTHING; 815 816 if ((i == 1) && (pkey != NULL) && (x509 != NULL)) 817 { 818 s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_C; 819 if ( !SSL_use_certificate(s,x509) || 820 !SSL_use_PrivateKey(s,pkey)) 821 { 822 i=0; 823 } 824 X509_free(x509); 825 EVP_PKEY_free(pkey); 826 } 827 else if (i == 1) 828 { 829 if (x509 != NULL) X509_free(x509); 830 if (pkey != NULL) EVP_PKEY_free(pkey); 831 SSLerr(SSL_F_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); 832 i=0; 833 } 834 835 if (i == 0) 836 { 837 /* We have no client certificate to respond with 838 * so send the correct error message back */ 839 s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_B; 840 p=buf; 841 *(p++)=SSL2_MT_ERROR; 842 s2n(SSL2_PE_NO_CERTIFICATE,p); 843 s->init_off=0; 844 s->init_num=3; 845 /* Write is done at the end */ 846 } 847 } 848 849 if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_B) 850 { 851 return(ssl2_do_write(s)); 852 } 853 854 if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_C) 855 { 856 EVP_MD_CTX ctx; 857 858 /* ok, now we calculate the checksum 859 * do it first so we can reuse buf :-) */ 860 p=buf; 861 EVP_MD_CTX_init(&ctx); 862 EVP_SignInit_ex(&ctx,s->ctx->rsa_md5, NULL); 863 EVP_SignUpdate(&ctx,s->s2->key_material, 864 s->s2->key_material_length); 865 EVP_SignUpdate(&ctx,cert_ch,(unsigned int)cert_ch_len); 866 i=i2d_X509(s->session->sess_cert->peer_key->x509,&p); 867 /* Don't update the signature if it fails - FIXME: probably should handle this better */ 868 if(i > 0) 869 EVP_SignUpdate(&ctx,buf,(unsigned int)i); 870 871 p=buf; 872 d=p+6; 873 *(p++)=SSL2_MT_CLIENT_CERTIFICATE; 874 *(p++)=SSL2_CT_X509_CERTIFICATE; 875 n=i2d_X509(s->cert->key->x509,&d); 876 s2n(n,p); 877 878 if (!EVP_SignFinal(&ctx,d,&n,s->cert->key->privatekey)) 879 { 880 /* this is not good. If things have failed it 881 * means there so something wrong with the key. 882 * We will continue with a 0 length signature 883 */ 884 } 885 EVP_MD_CTX_cleanup(&ctx); 886 s2n(n,p); 887 d+=n; 888 889 s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_D; 890 s->init_num=d-buf; 891 s->init_off=0; 892 } 893 /* if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_D) */ 894 return(ssl2_do_write(s)); 895 } 896 897 static int get_server_verify(SSL *s) 898 { 899 unsigned char *p; 900 int i, n, len; 901 902 p=(unsigned char *)s->init_buf->data; 903 if (s->state == SSL2_ST_GET_SERVER_VERIFY_A) 904 { 905 i=ssl2_read(s,(char *)&(p[s->init_num]),1-s->init_num); 906 if (i < (1-s->init_num)) 907 return(ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i)); 908 s->init_num += i; 909 910 s->state= SSL2_ST_GET_SERVER_VERIFY_B; 911 if (*p != SSL2_MT_SERVER_VERIFY) 912 { 913 if (p[0] != SSL2_MT_ERROR) 914 { 915 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); 916 SSLerr(SSL_F_GET_SERVER_VERIFY, 917 SSL_R_READ_WRONG_PACKET_TYPE); 918 } 919 else 920 { 921 SSLerr(SSL_F_GET_SERVER_VERIFY,SSL_R_PEER_ERROR); 922 /* try to read the error message */ 923 i=ssl2_read(s,(char *)&(p[s->init_num]),3-s->init_num); 924 return ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i); 925 } 926 return(-1); 927 } 928 } 929 930 p=(unsigned char *)s->init_buf->data; 931 len = 1 + s->s2->challenge_length; 932 n = len - s->init_num; 933 i = ssl2_read(s,(char *)&(p[s->init_num]),n); 934 if (i < n) 935 return(ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i)); 936 if (s->msg_callback) 937 s->msg_callback(0, s->version, 0, p, len, s, s->msg_callback_arg); /* SERVER-VERIFY */ 938 p += 1; 939 940 if (memcmp(p,s->s2->challenge,s->s2->challenge_length) != 0) 941 { 942 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); 943 SSLerr(SSL_F_GET_SERVER_VERIFY,SSL_R_CHALLENGE_IS_DIFFERENT); 944 return(-1); 945 } 946 return(1); 947 } 948 949 static int get_server_finished(SSL *s) 950 { 951 unsigned char *buf; 952 unsigned char *p; 953 int i, n, len; 954 955 buf=(unsigned char *)s->init_buf->data; 956 p=buf; 957 if (s->state == SSL2_ST_GET_SERVER_FINISHED_A) 958 { 959 i=ssl2_read(s,(char *)&(buf[s->init_num]),1-s->init_num); 960 if (i < (1-s->init_num)) 961 return(ssl2_part_read(s,SSL_F_GET_SERVER_FINISHED,i)); 962 s->init_num += i; 963 964 if (*p == SSL2_MT_REQUEST_CERTIFICATE) 965 { 966 s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_A; 967 return(1); 968 } 969 else if (*p != SSL2_MT_SERVER_FINISHED) 970 { 971 if (p[0] != SSL2_MT_ERROR) 972 { 973 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); 974 SSLerr(SSL_F_GET_SERVER_FINISHED,SSL_R_READ_WRONG_PACKET_TYPE); 975 } 976 else 977 { 978 SSLerr(SSL_F_GET_SERVER_FINISHED,SSL_R_PEER_ERROR); 979 /* try to read the error message */ 980 i=ssl2_read(s,(char *)&(p[s->init_num]),3-s->init_num); 981 return ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i); 982 } 983 return(-1); 984 } 985 s->state=SSL2_ST_GET_SERVER_FINISHED_B; 986 } 987 988 len = 1 + SSL2_SSL_SESSION_ID_LENGTH; 989 n = len - s->init_num; 990 i = ssl2_read(s,(char *)&(buf[s->init_num]), n); 991 if (i < n) /* XXX could be shorter than SSL2_SSL_SESSION_ID_LENGTH, that's the maximum */ 992 return(ssl2_part_read(s,SSL_F_GET_SERVER_FINISHED,i)); 993 s->init_num += i; 994 if (s->msg_callback) 995 s->msg_callback(0, s->version, 0, buf, (size_t)s->init_num, s, s->msg_callback_arg); /* SERVER-FINISHED */ 996 997 if (!s->hit) /* new session */ 998 { 999 /* new session-id */ 1000 /* Make sure we were not trying to re-use an old SSL_SESSION 1001 * or bad things can happen */ 1002 /* ZZZZZZZZZZZZZ */ 1003 s->session->session_id_length=SSL2_SSL_SESSION_ID_LENGTH; 1004 memcpy(s->session->session_id,p+1,SSL2_SSL_SESSION_ID_LENGTH); 1005 } 1006 else 1007 { 1008 if (!(s->options & SSL_OP_MICROSOFT_SESS_ID_BUG)) 1009 { 1010 if ((s->session->session_id_length > sizeof s->session->session_id) 1011 || (0 != memcmp(buf + 1, s->session->session_id, 1012 (unsigned int)s->session->session_id_length))) 1013 { 1014 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); 1015 SSLerr(SSL_F_GET_SERVER_FINISHED,SSL_R_SSL_SESSION_ID_IS_DIFFERENT); 1016 return(-1); 1017 } 1018 } 1019 } 1020 s->state = SSL_ST_OK; 1021 return(1); 1022 } 1023 1024 /* loads in the certificate from the server */ 1025 int ssl2_set_certificate(SSL *s, int type, int len, const unsigned char *data) 1026 { 1027 STACK_OF(X509) *sk=NULL; 1028 EVP_PKEY *pkey=NULL; 1029 SESS_CERT *sc=NULL; 1030 int i; 1031 X509 *x509=NULL; 1032 int ret=0; 1033 1034 x509=d2i_X509(NULL,&data,(long)len); 1035 if (x509 == NULL) 1036 { 1037 SSLerr(SSL_F_SSL2_SET_CERTIFICATE,ERR_R_X509_LIB); 1038 goto err; 1039 } 1040 1041 if ((sk=sk_X509_new_null()) == NULL || !sk_X509_push(sk,x509)) 1042 { 1043 SSLerr(SSL_F_SSL2_SET_CERTIFICATE,ERR_R_MALLOC_FAILURE); 1044 goto err; 1045 } 1046 1047 i=ssl_verify_cert_chain(s,sk); 1048 1049 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0)) 1050 { 1051 SSLerr(SSL_F_SSL2_SET_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED); 1052 goto err; 1053 } 1054 ERR_clear_error(); /* but we keep s->verify_result */ 1055 s->session->verify_result = s->verify_result; 1056 1057 /* server's cert for this session */ 1058 sc=ssl_sess_cert_new(); 1059 if (sc == NULL) 1060 { 1061 ret= -1; 1062 goto err; 1063 } 1064 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert); 1065 s->session->sess_cert=sc; 1066 1067 sc->peer_pkeys[SSL_PKEY_RSA_ENC].x509=x509; 1068 sc->peer_key= &(sc->peer_pkeys[SSL_PKEY_RSA_ENC]); 1069 1070 pkey=X509_get_pubkey(x509); 1071 x509=NULL; 1072 if (pkey == NULL) 1073 { 1074 SSLerr(SSL_F_SSL2_SET_CERTIFICATE,SSL_R_UNABLE_TO_EXTRACT_PUBLIC_KEY); 1075 goto err; 1076 } 1077 if (pkey->type != EVP_PKEY_RSA) 1078 { 1079 SSLerr(SSL_F_SSL2_SET_CERTIFICATE,SSL_R_PUBLIC_KEY_NOT_RSA); 1080 goto err; 1081 } 1082 1083 if (!ssl_set_peer_cert_type(sc,SSL2_CT_X509_CERTIFICATE)) 1084 goto err; 1085 ret=1; 1086 err: 1087 sk_X509_free(sk); 1088 X509_free(x509); 1089 EVP_PKEY_free(pkey); 1090 return(ret); 1091 } 1092 1093 static int ssl_rsa_public_encrypt(SESS_CERT *sc, int len, unsigned char *from, 1094 unsigned char *to, int padding) 1095 { 1096 EVP_PKEY *pkey=NULL; 1097 int i= -1; 1098 1099 if ((sc == NULL) || (sc->peer_key->x509 == NULL) || 1100 ((pkey=X509_get_pubkey(sc->peer_key->x509)) == NULL)) 1101 { 1102 SSLerr(SSL_F_SSL_RSA_PUBLIC_ENCRYPT,SSL_R_NO_PUBLICKEY); 1103 return(-1); 1104 } 1105 if (pkey->type != EVP_PKEY_RSA) 1106 { 1107 SSLerr(SSL_F_SSL_RSA_PUBLIC_ENCRYPT,SSL_R_PUBLIC_KEY_IS_NOT_RSA); 1108 goto end; 1109 } 1110 1111 /* we have the public key */ 1112 i=RSA_public_encrypt(len,from,to,pkey->pkey.rsa,padding); 1113 if (i < 0) 1114 SSLerr(SSL_F_SSL_RSA_PUBLIC_ENCRYPT,ERR_R_RSA_LIB); 1115 end: 1116 EVP_PKEY_free(pkey); 1117 return(i); 1118 } 1119 #else /* !OPENSSL_NO_SSL2 */ 1120 1121 # if PEDANTIC 1122 static void *dummy=&dummy; 1123 # endif 1124 1125 #endif 1126
