s2_srvr.c revision 306195
1/* ssl/s2_srvr.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 "../crypto/constant_time_locl.h" 115# include <stdio.h> 116# include <openssl/bio.h> 117# include <openssl/rand.h> 118# include <openssl/objects.h> 119# include <openssl/evp.h> 120 121static const SSL_METHOD *ssl2_get_server_method(int ver); 122static int get_client_master_key(SSL *s); 123static int get_client_hello(SSL *s); 124static int server_hello(SSL *s); 125static int get_client_finished(SSL *s); 126static int server_verify(SSL *s); 127static int server_finish(SSL *s); 128static int request_certificate(SSL *s); 129static int ssl_rsa_private_decrypt(CERT *c, int len, unsigned char *from, 130 unsigned char *to, int padding); 131# define BREAK break 132 133static const SSL_METHOD *ssl2_get_server_method(int ver) 134{ 135 if (ver == SSL2_VERSION) 136 return (SSLv2_server_method()); 137 else 138 return (NULL); 139} 140 141IMPLEMENT_ssl2_meth_func(SSLv2_server_method, 142 ssl2_accept, 143 ssl_undefined_function, ssl2_get_server_method) 144 145int ssl2_accept(SSL *s) 146{ 147 unsigned long l = (unsigned long)time(NULL); 148 BUF_MEM *buf = NULL; 149 int ret = -1; 150 long num1; 151 void (*cb) (const SSL *ssl, int type, int val) = NULL; 152 int new_state, state; 153 154 RAND_add(&l, sizeof(l), 0); 155 ERR_clear_error(); 156 clear_sys_error(); 157 158 if (s->info_callback != NULL) 159 cb = s->info_callback; 160 else if (s->ctx->info_callback != NULL) 161 cb = s->ctx->info_callback; 162 163 /* init things to blank */ 164 s->in_handshake++; 165 if (!SSL_in_init(s) || SSL_in_before(s)) 166 SSL_clear(s); 167 168 if (s->cert == NULL) { 169 SSLerr(SSL_F_SSL2_ACCEPT, SSL_R_NO_CERTIFICATE_SET); 170 return (-1); 171 } 172 173 clear_sys_error(); 174 for (;;) { 175 state = s->state; 176 177 switch (s->state) { 178 case SSL_ST_BEFORE: 179 case SSL_ST_ACCEPT: 180 case SSL_ST_BEFORE | SSL_ST_ACCEPT: 181 case SSL_ST_OK | SSL_ST_ACCEPT: 182 183 s->server = 1; 184 if (cb != NULL) 185 cb(s, SSL_CB_HANDSHAKE_START, 1); 186 187 s->version = SSL2_VERSION; 188 s->type = SSL_ST_ACCEPT; 189 190 if (s->init_buf == NULL) { 191 if ((buf = BUF_MEM_new()) == NULL) { 192 ret = -1; 193 goto end; 194 } 195 if (!BUF_MEM_grow 196 (buf, (int)SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)) { 197 BUF_MEM_free(buf); 198 ret = -1; 199 goto end; 200 } 201 s->init_buf = buf; 202 } 203 s->init_num = 0; 204 s->ctx->stats.sess_accept++; 205 s->handshake_func = ssl2_accept; 206 s->state = SSL2_ST_GET_CLIENT_HELLO_A; 207 BREAK; 208 209 case SSL2_ST_GET_CLIENT_HELLO_A: 210 case SSL2_ST_GET_CLIENT_HELLO_B: 211 case SSL2_ST_GET_CLIENT_HELLO_C: 212 s->shutdown = 0; 213 ret = get_client_hello(s); 214 if (ret <= 0) 215 goto end; 216 s->init_num = 0; 217 s->state = SSL2_ST_SEND_SERVER_HELLO_A; 218 BREAK; 219 220 case SSL2_ST_SEND_SERVER_HELLO_A: 221 case SSL2_ST_SEND_SERVER_HELLO_B: 222 ret = server_hello(s); 223 if (ret <= 0) 224 goto end; 225 s->init_num = 0; 226 if (!s->hit) { 227 s->state = SSL2_ST_GET_CLIENT_MASTER_KEY_A; 228 BREAK; 229 } else { 230 s->state = SSL2_ST_SERVER_START_ENCRYPTION; 231 BREAK; 232 } 233 case SSL2_ST_GET_CLIENT_MASTER_KEY_A: 234 case SSL2_ST_GET_CLIENT_MASTER_KEY_B: 235 ret = get_client_master_key(s); 236 if (ret <= 0) 237 goto end; 238 s->init_num = 0; 239 s->state = SSL2_ST_SERVER_START_ENCRYPTION; 240 BREAK; 241 242 case SSL2_ST_SERVER_START_ENCRYPTION: 243 /* 244 * Ok we how have sent all the stuff needed to start encrypting, 245 * the next packet back will be encrypted. 246 */ 247 if (!ssl2_enc_init(s, 0)) { 248 ret = -1; 249 goto end; 250 } 251 s->s2->clear_text = 0; 252 s->state = SSL2_ST_SEND_SERVER_VERIFY_A; 253 BREAK; 254 255 case SSL2_ST_SEND_SERVER_VERIFY_A: 256 case SSL2_ST_SEND_SERVER_VERIFY_B: 257 ret = server_verify(s); 258 if (ret <= 0) 259 goto end; 260 s->init_num = 0; 261 if (s->hit) { 262 /* 263 * If we are in here, we have been buffering the output, so 264 * we need to flush it and remove buffering from future 265 * traffic 266 */ 267 s->state = SSL2_ST_SEND_SERVER_VERIFY_C; 268 BREAK; 269 } else { 270 s->state = SSL2_ST_GET_CLIENT_FINISHED_A; 271 break; 272 } 273 274 case SSL2_ST_SEND_SERVER_VERIFY_C: 275 /* get the number of bytes to write */ 276 num1 = BIO_ctrl(s->wbio, BIO_CTRL_INFO, 0, NULL); 277 if (num1 > 0) { 278 s->rwstate = SSL_WRITING; 279 num1 = BIO_flush(s->wbio); 280 if (num1 <= 0) { 281 ret = -1; 282 goto end; 283 } 284 s->rwstate = SSL_NOTHING; 285 } 286 287 /* flushed and now remove buffering */ 288 s->wbio = BIO_pop(s->wbio); 289 290 s->state = SSL2_ST_GET_CLIENT_FINISHED_A; 291 BREAK; 292 293 case SSL2_ST_GET_CLIENT_FINISHED_A: 294 case SSL2_ST_GET_CLIENT_FINISHED_B: 295 ret = get_client_finished(s); 296 if (ret <= 0) 297 goto end; 298 s->init_num = 0; 299 s->state = SSL2_ST_SEND_REQUEST_CERTIFICATE_A; 300 BREAK; 301 302 case SSL2_ST_SEND_REQUEST_CERTIFICATE_A: 303 case SSL2_ST_SEND_REQUEST_CERTIFICATE_B: 304 case SSL2_ST_SEND_REQUEST_CERTIFICATE_C: 305 case SSL2_ST_SEND_REQUEST_CERTIFICATE_D: 306 /* 307 * don't do a 'request certificate' if we don't want to, or we 308 * already have one, and we only want to do it once. 309 */ 310 if (!(s->verify_mode & SSL_VERIFY_PEER) || 311 ((s->session->peer != NULL) && 312 (s->verify_mode & SSL_VERIFY_CLIENT_ONCE))) { 313 s->state = SSL2_ST_SEND_SERVER_FINISHED_A; 314 break; 315 } else { 316 ret = request_certificate(s); 317 if (ret <= 0) 318 goto end; 319 s->init_num = 0; 320 s->state = SSL2_ST_SEND_SERVER_FINISHED_A; 321 } 322 BREAK; 323 324 case SSL2_ST_SEND_SERVER_FINISHED_A: 325 case SSL2_ST_SEND_SERVER_FINISHED_B: 326 ret = server_finish(s); 327 if (ret <= 0) 328 goto end; 329 s->init_num = 0; 330 s->state = SSL_ST_OK; 331 break; 332 333 case SSL_ST_OK: 334 BUF_MEM_free(s->init_buf); 335 ssl_free_wbio_buffer(s); 336 s->init_buf = NULL; 337 s->init_num = 0; 338 /* ERR_clear_error(); */ 339 340 ssl_update_cache(s, SSL_SESS_CACHE_SERVER); 341 342 s->ctx->stats.sess_accept_good++; 343 /* s->server=1; */ 344 ret = 1; 345 346 if (cb != NULL) 347 cb(s, SSL_CB_HANDSHAKE_DONE, 1); 348 349 goto end; 350 /* BREAK; */ 351 352 default: 353 SSLerr(SSL_F_SSL2_ACCEPT, SSL_R_UNKNOWN_STATE); 354 ret = -1; 355 goto end; 356 /* BREAK; */ 357 } 358 359 if ((cb != NULL) && (s->state != state)) { 360 new_state = s->state; 361 s->state = state; 362 cb(s, SSL_CB_ACCEPT_LOOP, 1); 363 s->state = new_state; 364 } 365 } 366 end: 367 s->in_handshake--; 368 if (cb != NULL) 369 cb(s, SSL_CB_ACCEPT_EXIT, ret); 370 return (ret); 371} 372 373static int get_client_master_key(SSL *s) 374{ 375 int is_export, i, n, keya; 376 unsigned int num_encrypted_key_bytes, key_length; 377 unsigned long len; 378 unsigned char *p; 379 const SSL_CIPHER *cp; 380 const EVP_CIPHER *c; 381 const EVP_MD *md; 382 unsigned char rand_premaster_secret[SSL_MAX_MASTER_KEY_LENGTH]; 383 unsigned char decrypt_good; 384 size_t j; 385 386 p = (unsigned char *)s->init_buf->data; 387 if (s->state == SSL2_ST_GET_CLIENT_MASTER_KEY_A) { 388 i = ssl2_read(s, (char *)&(p[s->init_num]), 10 - s->init_num); 389 390 if (i < (10 - s->init_num)) 391 return (ssl2_part_read(s, SSL_F_GET_CLIENT_MASTER_KEY, i)); 392 s->init_num = 10; 393 394 if (*(p++) != SSL2_MT_CLIENT_MASTER_KEY) { 395 if (p[-1] != SSL2_MT_ERROR) { 396 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); 397 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, 398 SSL_R_READ_WRONG_PACKET_TYPE); 399 } else 400 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, SSL_R_PEER_ERROR); 401 return (-1); 402 } 403 404 cp = ssl2_get_cipher_by_char(p); 405 if (cp == NULL || sk_SSL_CIPHER_find(s->session->ciphers, cp) < 0) { 406 ssl2_return_error(s, SSL2_PE_NO_CIPHER); 407 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, SSL_R_NO_CIPHER_MATCH); 408 return (-1); 409 } 410 s->session->cipher = cp; 411 412 p += 3; 413 n2s(p, i); 414 s->s2->tmp.clear = i; 415 n2s(p, i); 416 s->s2->tmp.enc = i; 417 n2s(p, i); 418 if (i > SSL_MAX_KEY_ARG_LENGTH) { 419 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); 420 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, SSL_R_KEY_ARG_TOO_LONG); 421 return -1; 422 } 423 s->session->key_arg_length = i; 424 s->state = SSL2_ST_GET_CLIENT_MASTER_KEY_B; 425 } 426 427 /* SSL2_ST_GET_CLIENT_MASTER_KEY_B */ 428 p = (unsigned char *)s->init_buf->data; 429 if (s->init_buf->length < SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER) { 430 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); 431 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR); 432 return -1; 433 } 434 keya = s->session->key_arg_length; 435 len = 436 10 + (unsigned long)s->s2->tmp.clear + (unsigned long)s->s2->tmp.enc + 437 (unsigned long)keya; 438 if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER) { 439 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); 440 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, SSL_R_MESSAGE_TOO_LONG); 441 return -1; 442 } 443 n = (int)len - s->init_num; 444 i = ssl2_read(s, (char *)&(p[s->init_num]), n); 445 if (i != n) 446 return (ssl2_part_read(s, SSL_F_GET_CLIENT_MASTER_KEY, i)); 447 if (s->msg_callback) { 448 /* CLIENT-MASTER-KEY */ 449 s->msg_callback(0, s->version, 0, p, (size_t)len, s, 450 s->msg_callback_arg); 451 } 452 p += 10; 453 454 memcpy(s->session->key_arg, &(p[s->s2->tmp.clear + s->s2->tmp.enc]), 455 (unsigned int)keya); 456 457 if (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL) { 458 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); 459 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, SSL_R_NO_PRIVATEKEY); 460 return (-1); 461 } 462 463 is_export = SSL_C_IS_EXPORT(s->session->cipher); 464 465 if (!ssl_cipher_get_evp(s->session, &c, &md, NULL, NULL, NULL)) { 466 ssl2_return_error(s, SSL2_PE_NO_CIPHER); 467 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, 468 SSL_R_PROBLEMS_MAPPING_CIPHER_FUNCTIONS); 469 return (0); 470 } 471 472 /* 473 * The format of the CLIENT-MASTER-KEY message is 474 * 1 byte message type 475 * 3 bytes cipher 476 * 2-byte clear key length (stored in s->s2->tmp.clear) 477 * 2-byte encrypted key length (stored in s->s2->tmp.enc) 478 * 2-byte key args length (IV etc) 479 * clear key 480 * encrypted key 481 * key args 482 * 483 * If the cipher is an export cipher, then the encrypted key bytes 484 * are a fixed portion of the total key (5 or 8 bytes). The size of 485 * this portion is in |num_encrypted_key_bytes|. If the cipher is not an 486 * export cipher, then the entire key material is encrypted (i.e., clear 487 * key length must be zero). 488 */ 489 key_length = (unsigned int)EVP_CIPHER_key_length(c); 490 if (key_length > SSL_MAX_MASTER_KEY_LENGTH) { 491 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); 492 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR); 493 return -1; 494 } 495 496 if (s->session->cipher->algorithm2 & SSL2_CF_8_BYTE_ENC) { 497 is_export = 1; 498 num_encrypted_key_bytes = 8; 499 } else if (is_export) { 500 num_encrypted_key_bytes = 5; 501 } else { 502 num_encrypted_key_bytes = key_length; 503 } 504 505 if (s->s2->tmp.clear + num_encrypted_key_bytes != key_length) { 506 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); 507 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_BAD_LENGTH); 508 return -1; 509 } 510 /* 511 * The encrypted blob must decrypt to the encrypted portion of the key. 512 * Decryption can't be expanding, so if we don't have enough encrypted 513 * bytes to fit the key in the buffer, stop now. 514 */ 515 if (s->s2->tmp.enc < num_encrypted_key_bytes) { 516 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); 517 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_LENGTH_TOO_SHORT); 518 return -1; 519 } 520 521 /* 522 * We must not leak whether a decryption failure occurs because of 523 * Bleichenbacher's attack on PKCS #1 v1.5 RSA padding (see RFC 2246, 524 * section 7.4.7.1). The code follows that advice of the TLS RFC and 525 * generates a random premaster secret for the case that the decrypt 526 * fails. See https://tools.ietf.org/html/rfc5246#section-7.4.7.1 527 */ 528 529 if (RAND_bytes(rand_premaster_secret, 530 (int)num_encrypted_key_bytes) <= 0) 531 return 0; 532 533 i = ssl_rsa_private_decrypt(s->cert, s->s2->tmp.enc, 534 &(p[s->s2->tmp.clear]), 535 &(p[s->s2->tmp.clear]), 536 (s->s2->ssl2_rollback) ? RSA_SSLV23_PADDING : 537 RSA_PKCS1_PADDING); 538 ERR_clear_error(); 539 /* 540 * If a bad decrypt, continue with protocol but with a random master 541 * secret (Bleichenbacher attack) 542 */ 543 decrypt_good = constant_time_eq_int_8(i, (int)num_encrypted_key_bytes); 544 for (j = 0; j < num_encrypted_key_bytes; j++) { 545 p[s->s2->tmp.clear + j] = 546 constant_time_select_8(decrypt_good, p[s->s2->tmp.clear + j], 547 rand_premaster_secret[j]); 548 } 549 550 s->session->master_key_length = (int)key_length; 551 memcpy(s->session->master_key, p, key_length); 552 OPENSSL_cleanse(p, key_length); 553 554 return 1; 555} 556 557static int get_client_hello(SSL *s) 558{ 559 int i, n; 560 unsigned long len; 561 unsigned char *p; 562 STACK_OF(SSL_CIPHER) *cs; /* a stack of SSL_CIPHERS */ 563 STACK_OF(SSL_CIPHER) *cl; /* the ones we want to use */ 564 STACK_OF(SSL_CIPHER) *prio, *allow; 565 int z; 566 567 /* 568 * This is a bit of a hack to check for the correct packet type the first 569 * time round. 570 */ 571 if (s->state == SSL2_ST_GET_CLIENT_HELLO_A) { 572 s->first_packet = 1; 573 s->state = SSL2_ST_GET_CLIENT_HELLO_B; 574 } 575 576 p = (unsigned char *)s->init_buf->data; 577 if (s->state == SSL2_ST_GET_CLIENT_HELLO_B) { 578 i = ssl2_read(s, (char *)&(p[s->init_num]), 9 - s->init_num); 579 if (i < (9 - s->init_num)) 580 return (ssl2_part_read(s, SSL_F_GET_CLIENT_HELLO, i)); 581 s->init_num = 9; 582 583 if (*(p++) != SSL2_MT_CLIENT_HELLO) { 584 if (p[-1] != SSL2_MT_ERROR) { 585 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); 586 SSLerr(SSL_F_GET_CLIENT_HELLO, SSL_R_READ_WRONG_PACKET_TYPE); 587 } else 588 SSLerr(SSL_F_GET_CLIENT_HELLO, SSL_R_PEER_ERROR); 589 return (-1); 590 } 591 n2s(p, i); 592 if (i < s->version) 593 s->version = i; 594 n2s(p, i); 595 s->s2->tmp.cipher_spec_length = i; 596 n2s(p, i); 597 s->s2->tmp.session_id_length = i; 598 if ((i < 0) || (i > SSL_MAX_SSL_SESSION_ID_LENGTH)) { 599 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); 600 SSLerr(SSL_F_GET_CLIENT_HELLO, SSL_R_LENGTH_MISMATCH); 601 return -1; 602 } 603 n2s(p, i); 604 s->s2->challenge_length = i; 605 if ((i < SSL2_MIN_CHALLENGE_LENGTH) || 606 (i > SSL2_MAX_CHALLENGE_LENGTH)) { 607 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); 608 SSLerr(SSL_F_GET_CLIENT_HELLO, SSL_R_INVALID_CHALLENGE_LENGTH); 609 return (-1); 610 } 611 s->state = SSL2_ST_GET_CLIENT_HELLO_C; 612 } 613 614 /* SSL2_ST_GET_CLIENT_HELLO_C */ 615 p = (unsigned char *)s->init_buf->data; 616 len = 617 9 + (unsigned long)s->s2->tmp.cipher_spec_length + 618 (unsigned long)s->s2->challenge_length + 619 (unsigned long)s->s2->tmp.session_id_length; 620 if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER) { 621 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); 622 SSLerr(SSL_F_GET_CLIENT_HELLO, SSL_R_MESSAGE_TOO_LONG); 623 return -1; 624 } 625 n = (int)len - s->init_num; 626 i = ssl2_read(s, (char *)&(p[s->init_num]), n); 627 if (i != n) 628 return (ssl2_part_read(s, SSL_F_GET_CLIENT_HELLO, i)); 629 if (s->msg_callback) { 630 /* CLIENT-HELLO */ 631 s->msg_callback(0, s->version, 0, p, (size_t)len, s, 632 s->msg_callback_arg); 633 } 634 p += 9; 635 636 /* 637 * get session-id before cipher stuff so we can get out session structure 638 * if it is cached 639 */ 640 /* session-id */ 641 if ((s->s2->tmp.session_id_length != 0) && 642 (s->s2->tmp.session_id_length != SSL2_SSL_SESSION_ID_LENGTH)) { 643 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); 644 SSLerr(SSL_F_GET_CLIENT_HELLO, SSL_R_BAD_SSL_SESSION_ID_LENGTH); 645 return (-1); 646 } 647 648 if (s->s2->tmp.session_id_length == 0) { 649 if (!ssl_get_new_session(s, 1)) { 650 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); 651 return (-1); 652 } 653 } else { 654 i = ssl_get_prev_session(s, &(p[s->s2->tmp.cipher_spec_length]), 655 s->s2->tmp.session_id_length, NULL); 656 if (i == 1) { /* previous session */ 657 s->hit = 1; 658 } else if (i == -1) { 659 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); 660 return (-1); 661 } else { 662 if (s->cert == NULL) { 663 ssl2_return_error(s, SSL2_PE_NO_CERTIFICATE); 664 SSLerr(SSL_F_GET_CLIENT_HELLO, SSL_R_NO_CERTIFICATE_SET); 665 return (-1); 666 } 667 668 if (!ssl_get_new_session(s, 1)) { 669 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); 670 return (-1); 671 } 672 } 673 } 674 675 if (!s->hit) { 676 cs = ssl_bytes_to_cipher_list(s, p, s->s2->tmp.cipher_spec_length, 677 &s->session->ciphers); 678 if (cs == NULL) 679 goto mem_err; 680 681 cl = SSL_get_ciphers(s); 682 683 if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE) { 684 prio = sk_SSL_CIPHER_dup(cl); 685 if (prio == NULL) 686 goto mem_err; 687 allow = cs; 688 } else { 689 prio = cs; 690 allow = cl; 691 } 692 693 /* Generate list of SSLv2 ciphers shared between client and server */ 694 for (z = 0; z < sk_SSL_CIPHER_num(prio); z++) { 695 const SSL_CIPHER *cp = sk_SSL_CIPHER_value(prio, z); 696 if ((cp->algorithm_ssl & SSL_SSLV2) == 0 || 697 sk_SSL_CIPHER_find(allow, cp) < 0) { 698 (void)sk_SSL_CIPHER_delete(prio, z); 699 z--; 700 } 701 } 702 if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE) { 703 sk_SSL_CIPHER_free(s->session->ciphers); 704 s->session->ciphers = prio; 705 } 706 707 /* Make sure we have at least one cipher in common */ 708 if (sk_SSL_CIPHER_num(s->session->ciphers) == 0) { 709 ssl2_return_error(s, SSL2_PE_NO_CIPHER); 710 SSLerr(SSL_F_GET_CLIENT_HELLO, SSL_R_NO_CIPHER_MATCH); 711 return -1; 712 } 713 /* 714 * s->session->ciphers should now have a list of ciphers that are on 715 * both the client and server. This list is ordered by the order the 716 * client sent the ciphers or in the order of the server's preference 717 * if SSL_OP_CIPHER_SERVER_PREFERENCE was set. 718 */ 719 } 720 p += s->s2->tmp.cipher_spec_length; 721 /* done cipher selection */ 722 723 /* session id extracted already */ 724 p += s->s2->tmp.session_id_length; 725 726 /* challenge */ 727 if (s->s2->challenge_length > sizeof s->s2->challenge) { 728 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); 729 SSLerr(SSL_F_GET_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); 730 return -1; 731 } 732 memcpy(s->s2->challenge, p, (unsigned int)s->s2->challenge_length); 733 return (1); 734 mem_err: 735 SSLerr(SSL_F_GET_CLIENT_HELLO, ERR_R_MALLOC_FAILURE); 736 return (0); 737} 738 739static int server_hello(SSL *s) 740{ 741 unsigned char *p, *d; 742 int n, hit; 743 744 p = (unsigned char *)s->init_buf->data; 745 if (s->state == SSL2_ST_SEND_SERVER_HELLO_A) { 746 d = p + 11; 747 *(p++) = SSL2_MT_SERVER_HELLO; /* type */ 748 hit = s->hit; 749 *(p++) = (unsigned char)hit; 750# if 1 751 if (!hit) { 752 if (s->session->sess_cert != NULL) 753 /* 754 * This can't really happen because get_client_hello has 755 * called ssl_get_new_session, which does not set sess_cert. 756 */ 757 ssl_sess_cert_free(s->session->sess_cert); 758 s->session->sess_cert = ssl_sess_cert_new(); 759 if (s->session->sess_cert == NULL) { 760 SSLerr(SSL_F_SERVER_HELLO, ERR_R_MALLOC_FAILURE); 761 return (-1); 762 } 763 } 764 /* 765 * If 'hit' is set, then s->sess_cert may be non-NULL or NULL, 766 * depending on whether it survived in the internal cache or was 767 * retrieved from an external cache. If it is NULL, we cannot put any 768 * useful data in it anyway, so we don't touch it. 769 */ 770 771# else /* That's what used to be done when cert_st 772 * and sess_cert_st were * the same. */ 773 if (!hit) { /* else add cert to session */ 774 CRYPTO_add(&s->cert->references, 1, CRYPTO_LOCK_SSL_CERT); 775 if (s->session->sess_cert != NULL) 776 ssl_cert_free(s->session->sess_cert); 777 s->session->sess_cert = s->cert; 778 } else { /* We have a session id-cache hit, if the * 779 * session-id has no certificate listed 780 * against * the 'cert' structure, grab the 781 * 'old' one * listed against the SSL 782 * connection */ 783 if (s->session->sess_cert == NULL) { 784 CRYPTO_add(&s->cert->references, 1, CRYPTO_LOCK_SSL_CERT); 785 s->session->sess_cert = s->cert; 786 } 787 } 788# endif 789 790 if (s->cert == NULL) { 791 ssl2_return_error(s, SSL2_PE_NO_CERTIFICATE); 792 SSLerr(SSL_F_SERVER_HELLO, SSL_R_NO_CERTIFICATE_SPECIFIED); 793 return (-1); 794 } 795 796 if (hit) { 797 *(p++) = 0; /* no certificate type */ 798 s2n(s->version, p); /* version */ 799 s2n(0, p); /* cert len */ 800 s2n(0, p); /* ciphers len */ 801 } else { 802 /* EAY EAY */ 803 /* put certificate type */ 804 *(p++) = SSL2_CT_X509_CERTIFICATE; 805 s2n(s->version, p); /* version */ 806 n = i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509, NULL); 807 s2n(n, p); /* certificate length */ 808 i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509, &d); 809 n = 0; 810 811 /* 812 * lets send out the ciphers we like in the prefered order 813 */ 814 n = ssl_cipher_list_to_bytes(s, s->session->ciphers, d, 0); 815 d += n; 816 s2n(n, p); /* add cipher length */ 817 } 818 819 /* make and send conn_id */ 820 s2n(SSL2_CONNECTION_ID_LENGTH, p); /* add conn_id length */ 821 s->s2->conn_id_length = SSL2_CONNECTION_ID_LENGTH; 822 if (RAND_bytes(s->s2->conn_id, (int)s->s2->conn_id_length) <= 0) 823 return -1; 824 memcpy(d, s->s2->conn_id, SSL2_CONNECTION_ID_LENGTH); 825 d += SSL2_CONNECTION_ID_LENGTH; 826 827 s->state = SSL2_ST_SEND_SERVER_HELLO_B; 828 s->init_num = d - (unsigned char *)s->init_buf->data; 829 s->init_off = 0; 830 } 831 /* SSL2_ST_SEND_SERVER_HELLO_B */ 832 /* 833 * If we are using TCP/IP, the performance is bad if we do 2 writes 834 * without a read between them. This occurs when Session-id reuse is 835 * used, so I will put in a buffering module 836 */ 837 if (s->hit) { 838 if (!ssl_init_wbio_buffer(s, 1)) 839 return (-1); 840 } 841 842 return (ssl2_do_write(s)); 843} 844 845static int get_client_finished(SSL *s) 846{ 847 unsigned char *p; 848 int i, n; 849 unsigned long len; 850 851 p = (unsigned char *)s->init_buf->data; 852 if (s->state == SSL2_ST_GET_CLIENT_FINISHED_A) { 853 i = ssl2_read(s, (char *)&(p[s->init_num]), 1 - s->init_num); 854 if (i < 1 - s->init_num) 855 return (ssl2_part_read(s, SSL_F_GET_CLIENT_FINISHED, i)); 856 s->init_num += i; 857 858 if (*p != SSL2_MT_CLIENT_FINISHED) { 859 if (*p != SSL2_MT_ERROR) { 860 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); 861 SSLerr(SSL_F_GET_CLIENT_FINISHED, 862 SSL_R_READ_WRONG_PACKET_TYPE); 863 } else { 864 SSLerr(SSL_F_GET_CLIENT_FINISHED, SSL_R_PEER_ERROR); 865 /* try to read the error message */ 866 i = ssl2_read(s, (char *)&(p[s->init_num]), 3 - s->init_num); 867 return ssl2_part_read(s, SSL_F_GET_SERVER_VERIFY, i); 868 } 869 return (-1); 870 } 871 s->state = SSL2_ST_GET_CLIENT_FINISHED_B; 872 } 873 874 /* SSL2_ST_GET_CLIENT_FINISHED_B */ 875 if (s->s2->conn_id_length > sizeof s->s2->conn_id) { 876 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); 877 SSLerr(SSL_F_GET_CLIENT_FINISHED, ERR_R_INTERNAL_ERROR); 878 return -1; 879 } 880 len = 1 + (unsigned long)s->s2->conn_id_length; 881 n = (int)len - s->init_num; 882 i = ssl2_read(s, (char *)&(p[s->init_num]), n); 883 if (i < n) { 884 return (ssl2_part_read(s, SSL_F_GET_CLIENT_FINISHED, i)); 885 } 886 if (s->msg_callback) { 887 /* CLIENT-FINISHED */ 888 s->msg_callback(0, s->version, 0, p, len, s, s->msg_callback_arg); 889 } 890 p += 1; 891 if (memcmp(p, s->s2->conn_id, s->s2->conn_id_length) != 0) { 892 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); 893 SSLerr(SSL_F_GET_CLIENT_FINISHED, SSL_R_CONNECTION_ID_IS_DIFFERENT); 894 return (-1); 895 } 896 return (1); 897} 898 899static int server_verify(SSL *s) 900{ 901 unsigned char *p; 902 903 if (s->state == SSL2_ST_SEND_SERVER_VERIFY_A) { 904 p = (unsigned char *)s->init_buf->data; 905 *(p++) = SSL2_MT_SERVER_VERIFY; 906 if (s->s2->challenge_length > sizeof s->s2->challenge) { 907 SSLerr(SSL_F_SERVER_VERIFY, ERR_R_INTERNAL_ERROR); 908 return -1; 909 } 910 memcpy(p, s->s2->challenge, (unsigned int)s->s2->challenge_length); 911 /* p+=s->s2->challenge_length; */ 912 913 s->state = SSL2_ST_SEND_SERVER_VERIFY_B; 914 s->init_num = s->s2->challenge_length + 1; 915 s->init_off = 0; 916 } 917 return (ssl2_do_write(s)); 918} 919 920static int server_finish(SSL *s) 921{ 922 unsigned char *p; 923 924 if (s->state == SSL2_ST_SEND_SERVER_FINISHED_A) { 925 p = (unsigned char *)s->init_buf->data; 926 *(p++) = SSL2_MT_SERVER_FINISHED; 927 928 if (s->session->session_id_length > sizeof s->session->session_id) { 929 SSLerr(SSL_F_SERVER_FINISH, ERR_R_INTERNAL_ERROR); 930 return -1; 931 } 932 memcpy(p, s->session->session_id, 933 (unsigned int)s->session->session_id_length); 934 /* p+=s->session->session_id_length; */ 935 936 s->state = SSL2_ST_SEND_SERVER_FINISHED_B; 937 s->init_num = s->session->session_id_length + 1; 938 s->init_off = 0; 939 } 940 941 /* SSL2_ST_SEND_SERVER_FINISHED_B */ 942 return (ssl2_do_write(s)); 943} 944 945/* send the request and check the response */ 946static int request_certificate(SSL *s) 947{ 948 const unsigned char *cp; 949 unsigned char *p, *p2, *buf2; 950 unsigned char *ccd; 951 int i, j, ctype, ret = -1; 952 unsigned long len; 953 X509 *x509 = NULL; 954 STACK_OF(X509) *sk = NULL; 955 956 ccd = s->s2->tmp.ccl; 957 if (s->state == SSL2_ST_SEND_REQUEST_CERTIFICATE_A) { 958 p = (unsigned char *)s->init_buf->data; 959 *(p++) = SSL2_MT_REQUEST_CERTIFICATE; 960 *(p++) = SSL2_AT_MD5_WITH_RSA_ENCRYPTION; 961 if (RAND_bytes(ccd, SSL2_MIN_CERT_CHALLENGE_LENGTH) <= 0) 962 return -1; 963 memcpy(p, ccd, SSL2_MIN_CERT_CHALLENGE_LENGTH); 964 965 s->state = SSL2_ST_SEND_REQUEST_CERTIFICATE_B; 966 s->init_num = SSL2_MIN_CERT_CHALLENGE_LENGTH + 2; 967 s->init_off = 0; 968 } 969 970 if (s->state == SSL2_ST_SEND_REQUEST_CERTIFICATE_B) { 971 i = ssl2_do_write(s); 972 if (i <= 0) { 973 ret = i; 974 goto end; 975 } 976 977 s->init_num = 0; 978 s->state = SSL2_ST_SEND_REQUEST_CERTIFICATE_C; 979 } 980 981 if (s->state == SSL2_ST_SEND_REQUEST_CERTIFICATE_C) { 982 p = (unsigned char *)s->init_buf->data; 983 /* try to read 6 octets ... */ 984 i = ssl2_read(s, (char *)&(p[s->init_num]), 6 - s->init_num); 985 /* 986 * ... but don't call ssl2_part_read now if we got at least 3 987 * (probably NO-CERTIFICATE-ERROR) 988 */ 989 if (i < 3 - s->init_num) { 990 ret = ssl2_part_read(s, SSL_F_REQUEST_CERTIFICATE, i); 991 goto end; 992 } 993 s->init_num += i; 994 995 if ((s->init_num >= 3) && (p[0] == SSL2_MT_ERROR)) { 996 n2s(p, i); 997 if (i != SSL2_PE_NO_CERTIFICATE) { 998 /* 999 * not the error message we expected -- let ssl2_part_read 1000 * handle it 1001 */ 1002 s->init_num -= 3; 1003 ret = ssl2_part_read(s, SSL_F_REQUEST_CERTIFICATE, 3); 1004 goto end; 1005 } 1006 1007 if (s->msg_callback) { 1008 /* ERROR */ 1009 s->msg_callback(0, s->version, 0, p, 3, s, 1010 s->msg_callback_arg); 1011 } 1012 1013 /* 1014 * this is the one place where we can recover from an SSL 2.0 1015 * error 1016 */ 1017 1018 if (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT) { 1019 ssl2_return_error(s, SSL2_PE_BAD_CERTIFICATE); 1020 SSLerr(SSL_F_REQUEST_CERTIFICATE, 1021 SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE); 1022 goto end; 1023 } 1024 ret = 1; 1025 goto end; 1026 } 1027 if ((*(p++) != SSL2_MT_CLIENT_CERTIFICATE) || (s->init_num < 6)) { 1028 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR); 1029 SSLerr(SSL_F_REQUEST_CERTIFICATE, SSL_R_SHORT_READ); 1030 goto end; 1031 } 1032 if (s->init_num != 6) { 1033 SSLerr(SSL_F_REQUEST_CERTIFICATE, ERR_R_INTERNAL_ERROR); 1034 goto end; 1035 } 1036 1037 /* ok we have a response */ 1038 /* certificate type, there is only one right now. */ 1039 ctype = *(p++); 1040 if (ctype != SSL2_AT_MD5_WITH_RSA_ENCRYPTION) { 1041 ssl2_return_error(s, SSL2_PE_UNSUPPORTED_CERTIFICATE_TYPE); 1042 SSLerr(SSL_F_REQUEST_CERTIFICATE, SSL_R_BAD_RESPONSE_ARGUMENT); 1043 goto end; 1044 } 1045 n2s(p, i); 1046 s->s2->tmp.clen = i; 1047 n2s(p, i); 1048 s->s2->tmp.rlen = i; 1049 s->state = SSL2_ST_SEND_REQUEST_CERTIFICATE_D; 1050 } 1051 1052 /* SSL2_ST_SEND_REQUEST_CERTIFICATE_D */ 1053 p = (unsigned char *)s->init_buf->data; 1054 len = 6 + (unsigned long)s->s2->tmp.clen + (unsigned long)s->s2->tmp.rlen; 1055 if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER) { 1056 SSLerr(SSL_F_REQUEST_CERTIFICATE, SSL_R_MESSAGE_TOO_LONG); 1057 goto end; 1058 } 1059 j = (int)len - s->init_num; 1060 i = ssl2_read(s, (char *)&(p[s->init_num]), j); 1061 if (i < j) { 1062 ret = ssl2_part_read(s, SSL_F_REQUEST_CERTIFICATE, i); 1063 goto end; 1064 } 1065 if (s->msg_callback) { 1066 /* CLIENT-CERTIFICATE */ 1067 s->msg_callback(0, s->version, 0, p, len, s, s->msg_callback_arg); 1068 } 1069 p += 6; 1070 1071 cp = p; 1072 x509 = (X509 *)d2i_X509(NULL, &cp, (long)s->s2->tmp.clen); 1073 if (x509 == NULL) { 1074 SSLerr(SSL_F_REQUEST_CERTIFICATE, ERR_R_X509_LIB); 1075 goto msg_end; 1076 } 1077 1078 if (((sk = sk_X509_new_null()) == NULL) || (!sk_X509_push(sk, x509))) { 1079 SSLerr(SSL_F_REQUEST_CERTIFICATE, ERR_R_MALLOC_FAILURE); 1080 goto msg_end; 1081 } 1082 1083 i = ssl_verify_cert_chain(s, sk); 1084 1085 if (i > 0) { /* we like the packet, now check the chksum */ 1086 EVP_MD_CTX ctx; 1087 EVP_PKEY *pkey = NULL; 1088 1089 EVP_MD_CTX_init(&ctx); 1090 if (!EVP_VerifyInit_ex(&ctx, s->ctx->rsa_md5, NULL) 1091 || !EVP_VerifyUpdate(&ctx, s->s2->key_material, 1092 s->s2->key_material_length) 1093 || !EVP_VerifyUpdate(&ctx, ccd, SSL2_MIN_CERT_CHALLENGE_LENGTH)) 1094 goto msg_end; 1095 1096 i = i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509, NULL); 1097 buf2 = OPENSSL_malloc((unsigned int)i); 1098 if (buf2 == NULL) { 1099 SSLerr(SSL_F_REQUEST_CERTIFICATE, ERR_R_MALLOC_FAILURE); 1100 goto msg_end; 1101 } 1102 p2 = buf2; 1103 i = i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509, &p2); 1104 if (!EVP_VerifyUpdate(&ctx, buf2, (unsigned int)i)) { 1105 OPENSSL_free(buf2); 1106 goto msg_end; 1107 } 1108 OPENSSL_free(buf2); 1109 1110 pkey = X509_get_pubkey(x509); 1111 if (pkey == NULL) 1112 goto end; 1113 i = EVP_VerifyFinal(&ctx, cp, s->s2->tmp.rlen, pkey); 1114 EVP_PKEY_free(pkey); 1115 EVP_MD_CTX_cleanup(&ctx); 1116 1117 if (i > 0) { 1118 if (s->session->peer != NULL) 1119 X509_free(s->session->peer); 1120 s->session->peer = x509; 1121 CRYPTO_add(&x509->references, 1, CRYPTO_LOCK_X509); 1122 s->session->verify_result = s->verify_result; 1123 ret = 1; 1124 goto end; 1125 } else { 1126 SSLerr(SSL_F_REQUEST_CERTIFICATE, SSL_R_BAD_CHECKSUM); 1127 goto msg_end; 1128 } 1129 } else { 1130 msg_end: 1131 ssl2_return_error(s, SSL2_PE_BAD_CERTIFICATE); 1132 } 1133 end: 1134 sk_X509_free(sk); 1135 X509_free(x509); 1136 return (ret); 1137} 1138 1139static int ssl_rsa_private_decrypt(CERT *c, int len, unsigned char *from, 1140 unsigned char *to, int padding) 1141{ 1142 RSA *rsa; 1143 int i; 1144 1145 if ((c == NULL) || (c->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL)) { 1146 SSLerr(SSL_F_SSL_RSA_PRIVATE_DECRYPT, SSL_R_NO_PRIVATEKEY); 1147 return (-1); 1148 } 1149 if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey->type != EVP_PKEY_RSA) { 1150 SSLerr(SSL_F_SSL_RSA_PRIVATE_DECRYPT, SSL_R_PUBLIC_KEY_IS_NOT_RSA); 1151 return (-1); 1152 } 1153 rsa = c->pkeys[SSL_PKEY_RSA_ENC].privatekey->pkey.rsa; 1154 1155 /* we have the public key */ 1156 i = RSA_private_decrypt(len, from, to, rsa, padding); 1157 if (i < 0) 1158 SSLerr(SSL_F_SSL_RSA_PRIVATE_DECRYPT, ERR_R_RSA_LIB); 1159 return (i); 1160} 1161#else /* !OPENSSL_NO_SSL2 */ 1162 1163# if PEDANTIC 1164static void *dummy = &dummy; 1165# endif 1166 1167#endif 1168