s2_clnt.c revision 63249
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 * $FreeBSD: head/crypto/openssl/ssl/s2_clnt.c 59194 2000-04-13 07:15:03Z kris $ 59 */ 60 61#include "ssl_locl.h" 62#ifndef NO_SSL2 63#include <stdio.h> 64#include <openssl/rand.h> 65#include <openssl/buffer.h> 66#include <openssl/objects.h> 67#include <openssl/evp.h> 68 69static SSL_METHOD *ssl2_get_client_method(int ver); 70static int get_server_finished(SSL *s); 71static int get_server_verify(SSL *s); 72static int get_server_hello(SSL *s); 73static int client_hello(SSL *s); 74static int client_master_key(SSL *s); 75static int client_finished(SSL *s); 76static int client_certificate(SSL *s); 77static int ssl_rsa_public_encrypt(SESS_CERT *sc, int len, unsigned char *from, 78 unsigned char *to,int padding); 79#define BREAK break 80 81static SSL_METHOD *ssl2_get_client_method(int ver) 82 { 83 if (ver == SSL2_VERSION) 84 return(SSLv2_client_method()); 85 else 86 return(NULL); 87 } 88 89SSL_METHOD *SSLv2_client_method(void) 90 { 91 static int init=1; 92 static SSL_METHOD SSLv2_client_data; 93 94 if (init) 95 { 96 memcpy((char *)&SSLv2_client_data,(char *)sslv2_base_method(), 97 sizeof(SSL_METHOD)); 98 SSLv2_client_data.ssl_connect=ssl2_connect; 99 SSLv2_client_data.get_ssl_method=ssl2_get_client_method; 100 init=0; 101 } 102 return(&SSLv2_client_data); 103 } 104 105int ssl2_connect(SSL *s) 106 { 107 unsigned long l=time(NULL); 108 BUF_MEM *buf=NULL; 109 int ret= -1; 110 void (*cb)()=NULL; 111 int new_state,state; 112 113 RAND_add(&l,sizeof(l),0); 114 ERR_clear_error(); 115 clear_sys_error(); 116 117 if (s->info_callback != NULL) 118 cb=s->info_callback; 119 else if (s->ctx->info_callback != NULL) 120 cb=s->ctx->info_callback; 121 122 /* init things to blank */ 123 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); 124 s->in_handshake++; 125 126 for (;;) 127 { 128 state=s->state; 129 130 switch (s->state) 131 { 132 case SSL_ST_BEFORE: 133 case SSL_ST_CONNECT: 134 case SSL_ST_BEFORE|SSL_ST_CONNECT: 135 case SSL_ST_OK|SSL_ST_CONNECT: 136 137 s->server=0; 138 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1); 139 140 s->version=SSL2_VERSION; 141 s->type=SSL_ST_CONNECT; 142 143 buf=s->init_buf; 144 if ((buf == NULL) && ((buf=BUF_MEM_new()) == NULL)) 145 { 146 ret= -1; 147 goto end; 148 } 149 if (!BUF_MEM_grow(buf, 150 SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)) 151 { 152 ret= -1; 153 goto end; 154 } 155 s->init_buf=buf; 156 s->init_num=0; 157 s->state=SSL2_ST_SEND_CLIENT_HELLO_A; 158 s->ctx->stats.sess_connect++; 159 s->handshake_func=ssl2_connect; 160 BREAK; 161 162 case SSL2_ST_SEND_CLIENT_HELLO_A: 163 case SSL2_ST_SEND_CLIENT_HELLO_B: 164 s->shutdown=0; 165 ret=client_hello(s); 166 if (ret <= 0) goto end; 167 s->init_num=0; 168 s->state=SSL2_ST_GET_SERVER_HELLO_A; 169 BREAK; 170 171 case SSL2_ST_GET_SERVER_HELLO_A: 172 case SSL2_ST_GET_SERVER_HELLO_B: 173 ret=get_server_hello(s); 174 if (ret <= 0) goto end; 175 s->init_num=0; 176 if (!s->hit) /* new session */ 177 { 178 s->state=SSL2_ST_SEND_CLIENT_MASTER_KEY_A; 179 BREAK; 180 } 181 else 182 { 183 s->state=SSL2_ST_CLIENT_START_ENCRYPTION; 184 break; 185 } 186 187 case SSL2_ST_SEND_CLIENT_MASTER_KEY_A: 188 case SSL2_ST_SEND_CLIENT_MASTER_KEY_B: 189 ret=client_master_key(s); 190 if (ret <= 0) goto end; 191 s->init_num=0; 192 s->state=SSL2_ST_CLIENT_START_ENCRYPTION; 193 break; 194 195 case SSL2_ST_CLIENT_START_ENCRYPTION: 196 /* Ok, we now have all the stuff needed to 197 * start encrypting, so lets fire it up :-) */ 198 if (!ssl2_enc_init(s,1)) 199 { 200 ret= -1; 201 goto end; 202 } 203 s->s2->clear_text=0; 204 s->state=SSL2_ST_SEND_CLIENT_FINISHED_A; 205 break; 206 207 case SSL2_ST_SEND_CLIENT_FINISHED_A: 208 case SSL2_ST_SEND_CLIENT_FINISHED_B: 209 ret=client_finished(s); 210 if (ret <= 0) goto end; 211 s->init_num=0; 212 s->state=SSL2_ST_GET_SERVER_VERIFY_A; 213 break; 214 215 case SSL2_ST_GET_SERVER_VERIFY_A: 216 case SSL2_ST_GET_SERVER_VERIFY_B: 217 ret=get_server_verify(s); 218 if (ret <= 0) goto end; 219 s->init_num=0; 220 s->state=SSL2_ST_GET_SERVER_FINISHED_A; 221 break; 222 223 case SSL2_ST_GET_SERVER_FINISHED_A: 224 case SSL2_ST_GET_SERVER_FINISHED_B: 225 ret=get_server_finished(s); 226 if (ret <= 0) goto end; 227 break; 228 229 case SSL2_ST_SEND_CLIENT_CERTIFICATE_A: 230 case SSL2_ST_SEND_CLIENT_CERTIFICATE_B: 231 case SSL2_ST_SEND_CLIENT_CERTIFICATE_C: 232 case SSL2_ST_SEND_CLIENT_CERTIFICATE_D: 233 case SSL2_ST_X509_GET_CLIENT_CERTIFICATE: 234 ret=client_certificate(s); 235 if (ret <= 0) goto end; 236 s->init_num=0; 237 s->state=SSL2_ST_GET_SERVER_FINISHED_A; 238 break; 239 240 case SSL_ST_OK: 241 if (s->init_buf != NULL) 242 { 243 BUF_MEM_free(s->init_buf); 244 s->init_buf=NULL; 245 } 246 s->init_num=0; 247 /* ERR_clear_error();*/ 248 249 /* If we want to cache session-ids in the client 250 * and we successfully add the session-id to the 251 * cache, and there is a callback, then pass it out. 252 * 26/11/96 - eay - only add if not a re-used session. 253 */ 254 255 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT); 256 if (s->hit) s->ctx->stats.sess_hit++; 257 258 ret=1; 259 /* s->server=0; */ 260 s->ctx->stats.sess_connect_good++; 261 262 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1); 263 264 goto end; 265 /* break; */ 266 default: 267 SSLerr(SSL_F_SSL2_CONNECT,SSL_R_UNKNOWN_STATE); 268 return(-1); 269 /* break; */ 270 } 271 272 if ((cb != NULL) && (s->state != state)) 273 { 274 new_state=s->state; 275 s->state=state; 276 cb(s,SSL_CB_CONNECT_LOOP,1); 277 s->state=new_state; 278 } 279 } 280end: 281 s->in_handshake--; 282 if (cb != NULL) 283 cb(s,SSL_CB_CONNECT_EXIT,ret); 284 return(ret); 285 } 286 287static int get_server_hello(SSL *s) 288 { 289 unsigned char *buf; 290 unsigned char *p; 291 int i,j; 292 STACK_OF(SSL_CIPHER) *sk=NULL,*cl; 293 294 buf=(unsigned char *)s->init_buf->data; 295 p=buf; 296 if (s->state == SSL2_ST_GET_SERVER_HELLO_A) 297 { 298 i=ssl2_read(s,(char *)&(buf[s->init_num]),11-s->init_num); 299 if (i < (11-s->init_num)) 300 return(ssl2_part_read(s,SSL_F_GET_SERVER_HELLO,i)); 301 302 if (*(p++) != SSL2_MT_SERVER_HELLO) 303 { 304 if (p[-1] != SSL2_MT_ERROR) 305 { 306 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); 307 SSLerr(SSL_F_GET_SERVER_HELLO, 308 SSL_R_READ_WRONG_PACKET_TYPE); 309 } 310 else 311 SSLerr(SSL_F_GET_SERVER_HELLO, 312 SSL_R_PEER_ERROR); 313 return(-1); 314 } 315#ifdef __APPLE_CC__ 316 /* The Rhapsody 5.5 (a.k.a. MacOS X) compiler bug 317 * workaround. <appro@fy.chalmers.se> */ 318 s->hit=(i=*(p++))?1:0; 319#else 320 s->hit=(*(p++))?1:0; 321#endif 322 s->s2->tmp.cert_type= *(p++); 323 n2s(p,i); 324 if (i < s->version) s->version=i; 325 n2s(p,i); s->s2->tmp.cert_length=i; 326 n2s(p,i); s->s2->tmp.csl=i; 327 n2s(p,i); s->s2->tmp.conn_id_length=i; 328 s->state=SSL2_ST_GET_SERVER_HELLO_B; 329 s->init_num=0; 330 } 331 332 /* SSL2_ST_GET_SERVER_HELLO_B */ 333 j=s->s2->tmp.cert_length+s->s2->tmp.csl+s->s2->tmp.conn_id_length 334 - s->init_num; 335 i=ssl2_read(s,(char *)&(buf[s->init_num]),j); 336 if (i != j) return(ssl2_part_read(s,SSL_F_GET_SERVER_HELLO,i)); 337 338 /* things are looking good */ 339 340 p=buf; 341 if (s->hit) 342 { 343 if (s->s2->tmp.cert_length != 0) 344 { 345 SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_REUSE_CERT_LENGTH_NOT_ZERO); 346 return(-1); 347 } 348 if (s->s2->tmp.cert_type != 0) 349 { 350 if (!(s->options & 351 SSL_OP_SSLREF2_REUSE_CERT_TYPE_BUG)) 352 { 353 SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_REUSE_CERT_TYPE_NOT_ZERO); 354 return(-1); 355 } 356 } 357 if (s->s2->tmp.csl != 0) 358 { 359 SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_REUSE_CIPHER_LIST_NOT_ZERO); 360 return(-1); 361 } 362 } 363 else 364 { 365#ifdef undef 366 /* very bad */ 367 memset(s->session->session_id,0, 368 SSL_MAX_SSL_SESSION_ID_LENGTH_IN_BYTES); 369 s->session->session_id_length=0; 370 */ 371#endif 372 373 /* we need to do this in case we were trying to reuse a 374 * client session but others are already reusing it. 375 * If this was a new 'blank' session ID, the session-id 376 * length will still be 0 */ 377 if (s->session->session_id_length > 0) 378 { 379 if (!ssl_get_new_session(s,0)) 380 { 381 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); 382 return(-1); 383 } 384 } 385 386 if (ssl2_set_certificate(s,s->s2->tmp.cert_type, 387 s->s2->tmp.cert_length,p) <= 0) 388 { 389 ssl2_return_error(s,SSL2_PE_BAD_CERTIFICATE); 390 return(-1); 391 } 392 p+=s->s2->tmp.cert_length; 393 394 if (s->s2->tmp.csl == 0) 395 { 396 ssl2_return_error(s,SSL2_PE_NO_CIPHER); 397 SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_NO_CIPHER_LIST); 398 return(-1); 399 } 400 401 /* We have just received a list of ciphers back from the 402 * server. We need to get the ones that match, then select 403 * the one we want the most :-). */ 404 405 /* load the ciphers */ 406 sk=ssl_bytes_to_cipher_list(s,p,s->s2->tmp.csl, 407 &s->session->ciphers); 408 p+=s->s2->tmp.csl; 409 if (sk == NULL) 410 { 411 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); 412 SSLerr(SSL_F_GET_SERVER_HELLO,ERR_R_MALLOC_FAILURE); 413 return(-1); 414 } 415 416 sk_SSL_CIPHER_set_cmp_func(sk,ssl_cipher_ptr_id_cmp); 417 418 /* get the array of ciphers we will accept */ 419 cl=ssl_get_ciphers_by_id(s); 420 421 /* In theory we could have ciphers sent back that we 422 * don't want to use but that does not matter since we 423 * will check against the list we originally sent and 424 * for performance reasons we should not bother to match 425 * the two lists up just to check. */ 426 for (i=0; i<sk_SSL_CIPHER_num(cl); i++) 427 { 428 if (sk_SSL_CIPHER_find(sk, 429 sk_SSL_CIPHER_value(cl,i)) >= 0) 430 break; 431 } 432 433 if (i >= sk_SSL_CIPHER_num(cl)) 434 { 435 ssl2_return_error(s,SSL2_PE_NO_CIPHER); 436 SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_NO_CIPHER_MATCH); 437 return(-1); 438 } 439 s->session->cipher=sk_SSL_CIPHER_value(cl,i); 440 441 442 if (s->session->peer != NULL) /* can't happen*/ 443 { 444 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); 445 SSLerr(SSL_F_GET_SERVER_HELLO, SSL_R_INTERNAL_ERROR); 446 return(-1); 447 } 448 449 s->session->peer = s->session->sess_cert->peer_key->x509; 450 /* peer_key->x509 has been set by ssl2_set_certificate. */ 451 CRYPTO_add(&s->session->peer->references, 1, CRYPTO_LOCK_X509); 452 } 453 454 if (s->session->peer != s->session->sess_cert->peer_key->x509) 455 /* can't happen */ 456 { 457 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); 458 SSLerr(SSL_F_GET_SERVER_HELLO, SSL_R_INTERNAL_ERROR); 459 return(-1); 460 } 461 462 s->s2->conn_id_length=s->s2->tmp.conn_id_length; 463 memcpy(s->s2->conn_id,p,s->s2->tmp.conn_id_length); 464 return(1); 465 } 466 467static int client_hello(SSL *s) 468 { 469 unsigned char *buf; 470 unsigned char *p,*d; 471/* CIPHER **cipher;*/ 472 int i,n,j; 473 474 buf=(unsigned char *)s->init_buf->data; 475 if (s->state == SSL2_ST_SEND_CLIENT_HELLO_A) 476 { 477 if ((s->session == NULL) || 478 (s->session->ssl_version != s->version)) 479 { 480 if (!ssl_get_new_session(s,0)) 481 { 482 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); 483 return(-1); 484 } 485 } 486 /* else use the pre-loaded session */ 487 488 p=buf; /* header */ 489 d=p+9; /* data section */ 490 *(p++)=SSL2_MT_CLIENT_HELLO; /* type */ 491 s2n(SSL2_VERSION,p); /* version */ 492 n=j=0; 493 494 n=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),d); 495 d+=n; 496 497 if (n == 0) 498 { 499 SSLerr(SSL_F_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE); 500 return(-1); 501 } 502 503 s2n(n,p); /* cipher spec num bytes */ 504 505 if ((s->session->session_id_length > 0) && 506 (s->session->session_id_length <= 507 SSL2_MAX_SSL_SESSION_ID_LENGTH)) 508 { 509 i=s->session->session_id_length; 510 s2n(i,p); /* session id length */ 511 memcpy(d,s->session->session_id,(unsigned int)i); 512 d+=i; 513 } 514 else 515 { 516 s2n(0,p); 517 } 518 519 s->s2->challenge_length=SSL2_CHALLENGE_LENGTH; 520 s2n(SSL2_CHALLENGE_LENGTH,p); /* challenge length */ 521 /*challenge id data*/ 522 RAND_pseudo_bytes(s->s2->challenge,SSL2_CHALLENGE_LENGTH); 523 memcpy(d,s->s2->challenge,SSL2_CHALLENGE_LENGTH); 524 d+=SSL2_CHALLENGE_LENGTH; 525 526 s->state=SSL2_ST_SEND_CLIENT_HELLO_B; 527 s->init_num=d-buf; 528 s->init_off=0; 529 } 530 /* SSL2_ST_SEND_CLIENT_HELLO_B */ 531 return(ssl2_do_write(s)); 532 } 533 534static int client_master_key(SSL *s) 535 { 536 unsigned char *buf; 537 unsigned char *p,*d; 538 int clear,enc,karg,i; 539 SSL_SESSION *sess; 540 const EVP_CIPHER *c; 541 const EVP_MD *md; 542 543 buf=(unsigned char *)s->init_buf->data; 544 if (s->state == SSL2_ST_SEND_CLIENT_MASTER_KEY_A) 545 { 546 547 if (!ssl_cipher_get_evp(s->session,&c,&md,NULL)) 548 { 549 ssl2_return_error(s,SSL2_PE_NO_CIPHER); 550 SSLerr(SSL_F_CLIENT_MASTER_KEY,SSL_R_PROBLEMS_MAPPING_CIPHER_FUNCTIONS); 551 return(-1); 552 } 553 sess=s->session; 554 p=buf; 555 d=p+10; 556 *(p++)=SSL2_MT_CLIENT_MASTER_KEY;/* type */ 557 558 i=ssl_put_cipher_by_char(s,sess->cipher,p); 559 p+=i; 560 561 /* make key_arg data */ 562 i=EVP_CIPHER_iv_length(c); 563 sess->key_arg_length=i; 564 if (i > 0) RAND_pseudo_bytes(sess->key_arg,i); 565 566 /* make a master key */ 567 i=EVP_CIPHER_key_length(c); 568 sess->master_key_length=i; 569 if (i > 0) 570 { 571 if (RAND_bytes(sess->master_key,i) <= 0) 572 { 573 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); 574 return(-1); 575 } 576 } 577 578 if (sess->cipher->algorithm2 & SSL2_CF_8_BYTE_ENC) 579 enc=8; 580 else if (SSL_C_IS_EXPORT(sess->cipher)) 581 enc=5; 582 else 583 enc=i; 584 585 if (i < enc) 586 { 587 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); 588 SSLerr(SSL_F_CLIENT_MASTER_KEY,SSL_R_CIPHER_TABLE_SRC_ERROR); 589 return(-1); 590 } 591 clear=i-enc; 592 s2n(clear,p); 593 memcpy(d,sess->master_key,(unsigned int)clear); 594 d+=clear; 595 596 enc=ssl_rsa_public_encrypt(sess->sess_cert,enc, 597 &(sess->master_key[clear]),d, 598 (s->s2->ssl2_rollback)?RSA_SSLV23_PADDING:RSA_PKCS1_PADDING); 599 if (enc <= 0) 600 { 601 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); 602 SSLerr(SSL_F_CLIENT_MASTER_KEY,SSL_R_PUBLIC_KEY_ENCRYPT_ERROR); 603 return(-1); 604 } 605#ifdef PKCS1_CHECK 606 if (s->options & SSL_OP_PKCS1_CHECK_1) d[1]++; 607 if (s->options & SSL_OP_PKCS1_CHECK_2) 608 sess->master_key[clear]++; 609#endif 610 s2n(enc,p); 611 d+=enc; 612 karg=sess->key_arg_length; 613 s2n(karg,p); /* key arg size */ 614 memcpy(d,sess->key_arg,(unsigned int)karg); 615 d+=karg; 616 617 s->state=SSL2_ST_SEND_CLIENT_MASTER_KEY_B; 618 s->init_num=d-buf; 619 s->init_off=0; 620 } 621 622 /* SSL2_ST_SEND_CLIENT_MASTER_KEY_B */ 623 return(ssl2_do_write(s)); 624 } 625 626static int client_finished(SSL *s) 627 { 628 unsigned char *p; 629 630 if (s->state == SSL2_ST_SEND_CLIENT_FINISHED_A) 631 { 632 p=(unsigned char *)s->init_buf->data; 633 *(p++)=SSL2_MT_CLIENT_FINISHED; 634 memcpy(p,s->s2->conn_id,(unsigned int)s->s2->conn_id_length); 635 636 s->state=SSL2_ST_SEND_CLIENT_FINISHED_B; 637 s->init_num=s->s2->conn_id_length+1; 638 s->init_off=0; 639 } 640 return(ssl2_do_write(s)); 641 } 642 643/* read the data and then respond */ 644static int client_certificate(SSL *s) 645 { 646 unsigned char *buf; 647 unsigned char *p,*d; 648 int i; 649 unsigned int n; 650 int cert_ch_len=0; 651 unsigned char *cert_ch; 652 653 buf=(unsigned char *)s->init_buf->data; 654 cert_ch= &(buf[2]); 655 656 /* We have a cert associated with the SSL, so attach it to 657 * the session if it does not have one */ 658 659 if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_A) 660 { 661 i=ssl2_read(s,(char *)&(buf[s->init_num]), 662 SSL2_MAX_CERT_CHALLENGE_LENGTH+1-s->init_num); 663 if (i<(SSL2_MIN_CERT_CHALLENGE_LENGTH+1-s->init_num)) 664 return(ssl2_part_read(s,SSL_F_CLIENT_CERTIFICATE,i)); 665 666 /* type=buf[0]; */ 667 /* type eq x509 */ 668 if (buf[1] != SSL2_AT_MD5_WITH_RSA_ENCRYPTION) 669 { 670 ssl2_return_error(s,SSL2_PE_UNSUPPORTED_CERTIFICATE_TYPE); 671 SSLerr(SSL_F_CLIENT_CERTIFICATE,SSL_R_BAD_AUTHENTICATION_TYPE); 672 return(-1); 673 } 674 cert_ch_len=i-1; 675 676 if ((s->cert == NULL) || 677 (s->cert->key->x509 == NULL) || 678 (s->cert->key->privatekey == NULL)) 679 { 680 s->state=SSL2_ST_X509_GET_CLIENT_CERTIFICATE; 681 } 682 else 683 s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_C; 684 } 685 686 if (s->state == SSL2_ST_X509_GET_CLIENT_CERTIFICATE) 687 { 688 X509 *x509=NULL; 689 EVP_PKEY *pkey=NULL; 690 691 /* If we get an error we need to 692 * ssl->rwstate=SSL_X509_LOOKUP; 693 * return(error); 694 * We should then be retried when things are ok and we 695 * can get a cert or not */ 696 697 i=0; 698 if (s->ctx->client_cert_cb != NULL) 699 { 700 i=s->ctx->client_cert_cb(s,&(x509),&(pkey)); 701 } 702 703 if (i < 0) 704 { 705 s->rwstate=SSL_X509_LOOKUP; 706 return(-1); 707 } 708 s->rwstate=SSL_NOTHING; 709 710 if ((i == 1) && (pkey != NULL) && (x509 != NULL)) 711 { 712 s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_C; 713 if ( !SSL_use_certificate(s,x509) || 714 !SSL_use_PrivateKey(s,pkey)) 715 { 716 i=0; 717 } 718 X509_free(x509); 719 EVP_PKEY_free(pkey); 720 } 721 else if (i == 1) 722 { 723 if (x509 != NULL) X509_free(x509); 724 if (pkey != NULL) EVP_PKEY_free(pkey); 725 SSLerr(SSL_F_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); 726 i=0; 727 } 728 729 if (i == 0) 730 { 731 /* We have no client certificate to respond with 732 * so send the correct error message back */ 733 s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_B; 734 p=buf; 735 *(p++)=SSL2_MT_ERROR; 736 s2n(SSL2_PE_NO_CERTIFICATE,p); 737 s->init_off=0; 738 s->init_num=3; 739 /* Write is done at the end */ 740 } 741 } 742 743 if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_B) 744 { 745 return(ssl2_do_write(s)); 746 } 747 748 if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_C) 749 { 750 EVP_MD_CTX ctx; 751 752 /* ok, now we calculate the checksum 753 * do it first so we can reuse buf :-) */ 754 p=buf; 755 EVP_SignInit(&ctx,s->ctx->rsa_md5); 756 EVP_SignUpdate(&ctx,s->s2->key_material, 757 (unsigned int)s->s2->key_material_length); 758 EVP_SignUpdate(&ctx,cert_ch,(unsigned int)cert_ch_len); 759 n=i2d_X509(s->session->sess_cert->peer_key->x509,&p); 760 EVP_SignUpdate(&ctx,buf,(unsigned int)n); 761 762 p=buf; 763 d=p+6; 764 *(p++)=SSL2_MT_CLIENT_CERTIFICATE; 765 *(p++)=SSL2_CT_X509_CERTIFICATE; 766 n=i2d_X509(s->cert->key->x509,&d); 767 s2n(n,p); 768 769 if (!EVP_SignFinal(&ctx,d,&n,s->cert->key->privatekey)) 770 { 771 /* this is not good. If things have failed it 772 * means there so something wrong with the key. 773 * We will continue with a 0 length signature 774 */ 775 } 776 memset(&ctx,0,sizeof(ctx)); 777 s2n(n,p); 778 d+=n; 779 780 s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_D; 781 s->init_num=d-buf; 782 s->init_off=0; 783 } 784 /* if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_D) */ 785 return(ssl2_do_write(s)); 786 } 787 788static int get_server_verify(SSL *s) 789 { 790 unsigned char *p; 791 int i; 792 793 p=(unsigned char *)s->init_buf->data; 794 if (s->state == SSL2_ST_GET_SERVER_VERIFY_A) 795 { 796 i=ssl2_read(s,(char *)&(p[s->init_num]),1-s->init_num); 797 if (i < (1-s->init_num)) 798 return(ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i)); 799 800 s->state= SSL2_ST_GET_SERVER_VERIFY_B; 801 s->init_num=0; 802 if (*p != SSL2_MT_SERVER_VERIFY) 803 { 804 if (p[0] != SSL2_MT_ERROR) 805 { 806 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); 807 SSLerr(SSL_F_GET_SERVER_VERIFY, 808 SSL_R_READ_WRONG_PACKET_TYPE); 809 } 810 else 811 SSLerr(SSL_F_GET_SERVER_VERIFY, 812 SSL_R_PEER_ERROR); 813 return(-1); 814 } 815 } 816 817 p=(unsigned char *)s->init_buf->data; 818 i=ssl2_read(s,(char *)&(p[s->init_num]), 819 (unsigned int)s->s2->challenge_length-s->init_num); 820 if (i < ((int)s->s2->challenge_length-s->init_num)) 821 return(ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i)); 822 if (memcmp(p,s->s2->challenge,(unsigned int)s->s2->challenge_length) != 0) 823 { 824 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); 825 SSLerr(SSL_F_GET_SERVER_VERIFY,SSL_R_CHALLENGE_IS_DIFFERENT); 826 return(-1); 827 } 828 return(1); 829 } 830 831static int get_server_finished(SSL *s) 832 { 833 unsigned char *buf; 834 unsigned char *p; 835 int i; 836 837 buf=(unsigned char *)s->init_buf->data; 838 p=buf; 839 if (s->state == SSL2_ST_GET_SERVER_FINISHED_A) 840 { 841 i=ssl2_read(s,(char *)&(buf[s->init_num]),1-s->init_num); 842 if (i < (1-s->init_num)) 843 return(ssl2_part_read(s,SSL_F_GET_SERVER_FINISHED,i)); 844 s->init_num=i; 845 if (*p == SSL2_MT_REQUEST_CERTIFICATE) 846 { 847 s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_A; 848 return(1); 849 } 850 else if (*p != SSL2_MT_SERVER_FINISHED) 851 { 852 if (p[0] != SSL2_MT_ERROR) 853 { 854 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); 855 SSLerr(SSL_F_GET_SERVER_FINISHED,SSL_R_READ_WRONG_PACKET_TYPE); 856 } 857 else 858 SSLerr(SSL_F_GET_SERVER_FINISHED,SSL_R_PEER_ERROR); 859 return(-1); 860 } 861 s->state=SSL_ST_OK; 862 s->init_num=0; 863 } 864 865 i=ssl2_read(s,(char *)&(buf[s->init_num]), 866 SSL2_SSL_SESSION_ID_LENGTH-s->init_num); 867 if (i < (SSL2_SSL_SESSION_ID_LENGTH-s->init_num)) 868 return(ssl2_part_read(s,SSL_F_GET_SERVER_FINISHED,i)); 869 870 if (!s->hit) /* new session */ 871 { 872 /* new session-id */ 873 /* Make sure we were not trying to re-use an old SSL_SESSION 874 * or bad things can happen */ 875 /* ZZZZZZZZZZZZZ */ 876 s->session->session_id_length=SSL2_SSL_SESSION_ID_LENGTH; 877 memcpy(s->session->session_id,p,SSL2_SSL_SESSION_ID_LENGTH); 878 } 879 else 880 { 881 if (!(s->options & SSL_OP_MICROSOFT_SESS_ID_BUG)) 882 { 883 if (memcmp(buf,s->session->session_id, 884 (unsigned int)s->session->session_id_length) != 0) 885 { 886 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); 887 SSLerr(SSL_F_GET_SERVER_FINISHED,SSL_R_SSL_SESSION_ID_IS_DIFFERENT); 888 return(-1); 889 } 890 } 891 } 892 return(1); 893 } 894 895/* loads in the certificate from the server */ 896int ssl2_set_certificate(SSL *s, int type, int len, unsigned char *data) 897 { 898 STACK_OF(X509) *sk=NULL; 899 EVP_PKEY *pkey=NULL; 900 SESS_CERT *sc=NULL; 901 int i; 902 X509 *x509=NULL; 903 int ret=0; 904 905 x509=d2i_X509(NULL,&data,(long)len); 906 if (x509 == NULL) 907 { 908 SSLerr(SSL_F_SSL2_SET_CERTIFICATE,ERR_R_X509_LIB); 909 goto err; 910 } 911 912 if ((sk=sk_X509_new_null()) == NULL || !sk_X509_push(sk,x509)) 913 { 914 SSLerr(SSL_F_SSL2_SET_CERTIFICATE,ERR_R_MALLOC_FAILURE); 915 goto err; 916 } 917 918 i=ssl_verify_cert_chain(s,sk); 919 920 if ((s->verify_mode != SSL_VERIFY_NONE) && (!i)) 921 { 922 SSLerr(SSL_F_SSL2_SET_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED); 923 goto err; 924 } 925 926 /* server's cert for this session */ 927 sc=ssl_sess_cert_new(); 928 if (sc == NULL) 929 { 930 ret= -1; 931 goto err; 932 } 933 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert); 934 s->session->sess_cert=sc; 935 936 sc->peer_pkeys[SSL_PKEY_RSA_ENC].x509=x509; 937 sc->peer_key= &(sc->peer_pkeys[SSL_PKEY_RSA_ENC]); 938 939 pkey=X509_get_pubkey(x509); 940 x509=NULL; 941 if (pkey == NULL) 942 { 943 SSLerr(SSL_F_SSL2_SET_CERTIFICATE,SSL_R_UNABLE_TO_EXTRACT_PUBLIC_KEY); 944 goto err; 945 } 946 if (pkey->type != EVP_PKEY_RSA) 947 { 948 SSLerr(SSL_F_SSL2_SET_CERTIFICATE,SSL_R_PUBLIC_KEY_NOT_RSA); 949 goto err; 950 } 951 952 if (!ssl_set_peer_cert_type(sc,SSL2_CT_X509_CERTIFICATE)) 953 goto err; 954 ret=1; 955err: 956 sk_X509_free(sk); 957 X509_free(x509); 958 EVP_PKEY_free(pkey); 959 return(ret); 960 } 961 962static int ssl_rsa_public_encrypt(SESS_CERT *sc, int len, unsigned char *from, 963 unsigned char *to, int padding) 964 { 965 EVP_PKEY *pkey=NULL; 966 int i= -1; 967 968 if ((sc == NULL) || (sc->peer_key->x509 == NULL) || 969 ((pkey=X509_get_pubkey(sc->peer_key->x509)) == NULL)) 970 { 971 SSLerr(SSL_F_SSL_RSA_PUBLIC_ENCRYPT,SSL_R_NO_PUBLICKEY); 972 return(-1); 973 } 974 if (pkey->type != EVP_PKEY_RSA) 975 { 976 SSLerr(SSL_F_SSL_RSA_PUBLIC_ENCRYPT,SSL_R_PUBLIC_KEY_IS_NOT_RSA); 977 goto end; 978 } 979 980 /* we have the public key */ 981 i=RSA_public_encrypt(len,from,to,pkey->pkey.rsa,padding); 982 if (i < 0) 983 SSLerr(SSL_F_SSL_RSA_PUBLIC_ENCRYPT,ERR_R_RSA_LIB); 984end: 985 EVP_PKEY_free(pkey); 986 return(i); 987 } 988#else /* !NO_SSL2 */ 989 990# if PEDANTIC 991static void *dummy=&dummy; 992# endif 993 994#endif 995