s3_both.c revision 296465
1/* ssl/s3_both.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) 1998-2002 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 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. 113 * ECC cipher suite support in OpenSSL originally developed by 114 * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project. 115 */ 116 117#include <limits.h> 118#include <string.h> 119#include <stdio.h> 120#include "ssl_locl.h" 121#include <openssl/buffer.h> 122#include <openssl/rand.h> 123#include <openssl/objects.h> 124#include <openssl/evp.h> 125#include <openssl/x509.h> 126 127/* 128 * send s->init_buf in records of type 'type' (SSL3_RT_HANDSHAKE or 129 * SSL3_RT_CHANGE_CIPHER_SPEC) 130 */ 131int ssl3_do_write(SSL *s, int type) 132{ 133 int ret; 134 135 ret = ssl3_write_bytes(s, type, &s->init_buf->data[s->init_off], 136 s->init_num); 137 if (ret < 0) 138 return (-1); 139 if (type == SSL3_RT_HANDSHAKE) 140 /* 141 * should not be done for 'Hello Request's, but in that case we'll 142 * ignore the result anyway 143 */ 144 ssl3_finish_mac(s, (unsigned char *)&s->init_buf->data[s->init_off], 145 ret); 146 147 if (ret == s->init_num) { 148 if (s->msg_callback) 149 s->msg_callback(1, s->version, type, s->init_buf->data, 150 (size_t)(s->init_off + s->init_num), s, 151 s->msg_callback_arg); 152 return (1); 153 } 154 s->init_off += ret; 155 s->init_num -= ret; 156 return (0); 157} 158 159int ssl3_send_finished(SSL *s, int a, int b, const char *sender, int slen) 160{ 161 unsigned char *p, *d; 162 int i; 163 unsigned long l; 164 165 if (s->state == a) { 166 d = (unsigned char *)s->init_buf->data; 167 p = &(d[4]); 168 169 i = s->method->ssl3_enc->final_finish_mac(s, 170 &(s->s3->finish_dgst1), 171 &(s->s3->finish_dgst2), 172 sender, slen, 173 s->s3->tmp.finish_md); 174 s->s3->tmp.finish_md_len = i; 175 memcpy(p, s->s3->tmp.finish_md, i); 176 p += i; 177 l = i; 178 179 /* 180 * Copy the finished so we can use it for renegotiation checks 181 */ 182 if (s->type == SSL_ST_CONNECT) { 183 OPENSSL_assert(i <= EVP_MAX_MD_SIZE); 184 memcpy(s->s3->previous_client_finished, s->s3->tmp.finish_md, i); 185 s->s3->previous_client_finished_len = i; 186 } else { 187 OPENSSL_assert(i <= EVP_MAX_MD_SIZE); 188 memcpy(s->s3->previous_server_finished, s->s3->tmp.finish_md, i); 189 s->s3->previous_server_finished_len = i; 190 } 191 192#ifdef OPENSSL_SYS_WIN16 193 /* 194 * MSVC 1.5 does not clear the top bytes of the word unless I do 195 * this. 196 */ 197 l &= 0xffff; 198#endif 199 200 *(d++) = SSL3_MT_FINISHED; 201 l2n3(l, d); 202 s->init_num = (int)l + 4; 203 s->init_off = 0; 204 205 s->state = b; 206 } 207 208 /* SSL3_ST_SEND_xxxxxx_HELLO_B */ 209 return (ssl3_do_write(s, SSL3_RT_HANDSHAKE)); 210} 211 212int ssl3_get_finished(SSL *s, int a, int b) 213{ 214 int al, i, ok; 215 long n; 216 unsigned char *p; 217 218 /* 219 * the mac has already been generated when we received the change cipher 220 * spec message and is in s->s3->tmp.peer_finish_md 221 */ 222 223 /* 64 argument should actually be 36+4 :-) */ 224 n = s->method->ssl_get_message(s, a, b, SSL3_MT_FINISHED, 64, &ok); 225 226 if (!ok) 227 return ((int)n); 228 229 /* If this occurs, we have missed a message */ 230 if (!s->s3->change_cipher_spec) { 231 al = SSL_AD_UNEXPECTED_MESSAGE; 232 SSLerr(SSL_F_SSL3_GET_FINISHED, SSL_R_GOT_A_FIN_BEFORE_A_CCS); 233 goto f_err; 234 } 235 s->s3->change_cipher_spec = 0; 236 237 p = (unsigned char *)s->init_msg; 238 i = s->s3->tmp.peer_finish_md_len; 239 240 if (i != n) { 241 al = SSL_AD_DECODE_ERROR; 242 SSLerr(SSL_F_SSL3_GET_FINISHED, SSL_R_BAD_DIGEST_LENGTH); 243 goto f_err; 244 } 245 246 if (CRYPTO_memcmp(p, s->s3->tmp.peer_finish_md, i) != 0) { 247 al = SSL_AD_DECRYPT_ERROR; 248 SSLerr(SSL_F_SSL3_GET_FINISHED, SSL_R_DIGEST_CHECK_FAILED); 249 goto f_err; 250 } 251 252 /* 253 * Copy the finished so we can use it for renegotiation checks 254 */ 255 if (s->type == SSL_ST_ACCEPT) { 256 OPENSSL_assert(i <= EVP_MAX_MD_SIZE); 257 memcpy(s->s3->previous_client_finished, s->s3->tmp.peer_finish_md, i); 258 s->s3->previous_client_finished_len = i; 259 } else { 260 OPENSSL_assert(i <= EVP_MAX_MD_SIZE); 261 memcpy(s->s3->previous_server_finished, s->s3->tmp.peer_finish_md, i); 262 s->s3->previous_server_finished_len = i; 263 } 264 265 return (1); 266 f_err: 267 ssl3_send_alert(s, SSL3_AL_FATAL, al); 268 return (0); 269} 270 271/*- 272 * for these 2 messages, we need to 273 * ssl->enc_read_ctx re-init 274 * ssl->s3->read_sequence zero 275 * ssl->s3->read_mac_secret re-init 276 * ssl->session->read_sym_enc assign 277 * ssl->session->read_compression assign 278 * ssl->session->read_hash assign 279 */ 280int ssl3_send_change_cipher_spec(SSL *s, int a, int b) 281{ 282 unsigned char *p; 283 284 if (s->state == a) { 285 p = (unsigned char *)s->init_buf->data; 286 *p = SSL3_MT_CCS; 287 s->init_num = 1; 288 s->init_off = 0; 289 290 s->state = b; 291 } 292 293 /* SSL3_ST_CW_CHANGE_B */ 294 return (ssl3_do_write(s, SSL3_RT_CHANGE_CIPHER_SPEC)); 295} 296 297static int ssl3_add_cert_to_buf(BUF_MEM *buf, unsigned long *l, X509 *x) 298{ 299 int n; 300 unsigned char *p; 301 302 n = i2d_X509(x, NULL); 303 if (!BUF_MEM_grow_clean(buf, (int)(n + (*l) + 3))) { 304 SSLerr(SSL_F_SSL3_ADD_CERT_TO_BUF, ERR_R_BUF_LIB); 305 return (-1); 306 } 307 p = (unsigned char *)&(buf->data[*l]); 308 l2n3(n, p); 309 i2d_X509(x, &p); 310 *l += n + 3; 311 312 return (0); 313} 314 315unsigned long ssl3_output_cert_chain(SSL *s, X509 *x) 316{ 317 unsigned char *p; 318 int i; 319 unsigned long l = 7; 320 BUF_MEM *buf; 321 int no_chain; 322 323 if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || s->ctx->extra_certs) 324 no_chain = 1; 325 else 326 no_chain = 0; 327 328 /* TLSv1 sends a chain with nothing in it, instead of an alert */ 329 buf = s->init_buf; 330 if (!BUF_MEM_grow_clean(buf, 10)) { 331 SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN, ERR_R_BUF_LIB); 332 return (0); 333 } 334 if (x != NULL) { 335 if (no_chain) { 336 if (ssl3_add_cert_to_buf(buf, &l, x)) 337 return (0); 338 } else { 339 X509_STORE_CTX xs_ctx; 340 341 if (!X509_STORE_CTX_init(&xs_ctx, s->ctx->cert_store, x, NULL)) { 342 SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN, ERR_R_X509_LIB); 343 return (0); 344 } 345 X509_verify_cert(&xs_ctx); 346 /* Don't leave errors in the queue */ 347 ERR_clear_error(); 348 for (i = 0; i < sk_X509_num(xs_ctx.chain); i++) { 349 x = sk_X509_value(xs_ctx.chain, i); 350 351 if (ssl3_add_cert_to_buf(buf, &l, x)) { 352 X509_STORE_CTX_cleanup(&xs_ctx); 353 return 0; 354 } 355 } 356 X509_STORE_CTX_cleanup(&xs_ctx); 357 } 358 } 359 /* Thawte special :-) */ 360 for (i = 0; i < sk_X509_num(s->ctx->extra_certs); i++) { 361 x = sk_X509_value(s->ctx->extra_certs, i); 362 if (ssl3_add_cert_to_buf(buf, &l, x)) 363 return (0); 364 } 365 366 l -= 7; 367 p = (unsigned char *)&(buf->data[4]); 368 l2n3(l, p); 369 l += 3; 370 p = (unsigned char *)&(buf->data[0]); 371 *(p++) = SSL3_MT_CERTIFICATE; 372 l2n3(l, p); 373 l += 4; 374 return (l); 375} 376 377/* 378 * Obtain handshake message of message type 'mt' (any if mt == -1), maximum 379 * acceptable body length 'max'. The first four bytes (msg_type and length) 380 * are read in state 'st1', the body is read in state 'stn'. 381 */ 382long ssl3_get_message(SSL *s, int st1, int stn, int mt, long max, int *ok) 383{ 384 unsigned char *p; 385 unsigned long l; 386 long n; 387 int i, al; 388 389 if (s->s3->tmp.reuse_message) { 390 s->s3->tmp.reuse_message = 0; 391 if ((mt >= 0) && (s->s3->tmp.message_type != mt)) { 392 al = SSL_AD_UNEXPECTED_MESSAGE; 393 SSLerr(SSL_F_SSL3_GET_MESSAGE, SSL_R_UNEXPECTED_MESSAGE); 394 goto f_err; 395 } 396 *ok = 1; 397 s->init_msg = s->init_buf->data + 4; 398 s->init_num = (int)s->s3->tmp.message_size; 399 return s->init_num; 400 } 401 402 p = (unsigned char *)s->init_buf->data; 403 404 if (s->state == st1) { /* s->init_num < 4 */ 405 int skip_message; 406 407 do { 408 while (s->init_num < 4) { 409 i = s->method->ssl_read_bytes(s, SSL3_RT_HANDSHAKE, 410 &p[s->init_num], 411 4 - s->init_num, 0); 412 if (i <= 0) { 413 s->rwstate = SSL_READING; 414 *ok = 0; 415 return i; 416 } 417 s->init_num += i; 418 } 419 420 skip_message = 0; 421 if (!s->server) 422 if (p[0] == SSL3_MT_HELLO_REQUEST) 423 /* 424 * The server may always send 'Hello Request' messages -- 425 * we are doing a handshake anyway now, so ignore them if 426 * their format is correct. Does not count for 'Finished' 427 * MAC. 428 */ 429 if (p[1] == 0 && p[2] == 0 && p[3] == 0) { 430 s->init_num = 0; 431 skip_message = 1; 432 433 if (s->msg_callback) 434 s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, 435 p, 4, s, s->msg_callback_arg); 436 } 437 } 438 while (skip_message); 439 440 /* s->init_num == 4 */ 441 442 if ((mt >= 0) && (*p != mt)) { 443 al = SSL_AD_UNEXPECTED_MESSAGE; 444 SSLerr(SSL_F_SSL3_GET_MESSAGE, SSL_R_UNEXPECTED_MESSAGE); 445 goto f_err; 446 } 447 if ((mt < 0) && (*p == SSL3_MT_CLIENT_HELLO) && 448 (st1 == SSL3_ST_SR_CERT_A) && (stn == SSL3_ST_SR_CERT_B)) { 449 /* 450 * At this point we have got an MS SGC second client hello (maybe 451 * we should always allow the client to start a new handshake?). 452 * We need to restart the mac. Don't increment 453 * {num,total}_renegotiations because we have not completed the 454 * handshake. 455 */ 456 ssl3_init_finished_mac(s); 457 } 458 459 s->s3->tmp.message_type = *(p++); 460 461 n2l3(p, l); 462 if (l > (unsigned long)max) { 463 al = SSL_AD_ILLEGAL_PARAMETER; 464 SSLerr(SSL_F_SSL3_GET_MESSAGE, SSL_R_EXCESSIVE_MESSAGE_SIZE); 465 goto f_err; 466 } 467 if (l > (INT_MAX - 4)) { /* BUF_MEM_grow takes an 'int' parameter */ 468 al = SSL_AD_ILLEGAL_PARAMETER; 469 SSLerr(SSL_F_SSL3_GET_MESSAGE, SSL_R_EXCESSIVE_MESSAGE_SIZE); 470 goto f_err; 471 } 472 if (l && !BUF_MEM_grow_clean(s->init_buf, (int)l + 4)) { 473 SSLerr(SSL_F_SSL3_GET_MESSAGE, ERR_R_BUF_LIB); 474 goto err; 475 } 476 s->s3->tmp.message_size = l; 477 s->state = stn; 478 479 s->init_msg = s->init_buf->data + 4; 480 s->init_num = 0; 481 } 482 483 /* next state (stn) */ 484 p = s->init_msg; 485 n = s->s3->tmp.message_size - s->init_num; 486 while (n > 0) { 487 i = s->method->ssl_read_bytes(s, SSL3_RT_HANDSHAKE, &p[s->init_num], 488 n, 0); 489 if (i <= 0) { 490 s->rwstate = SSL_READING; 491 *ok = 0; 492 return i; 493 } 494 s->init_num += i; 495 n -= i; 496 } 497 ssl3_finish_mac(s, (unsigned char *)s->init_buf->data, s->init_num + 4); 498 if (s->msg_callback) 499 s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, s->init_buf->data, 500 (size_t)s->init_num + 4, s, s->msg_callback_arg); 501 *ok = 1; 502 return s->init_num; 503 f_err: 504 ssl3_send_alert(s, SSL3_AL_FATAL, al); 505 err: 506 *ok = 0; 507 return (-1); 508} 509 510int ssl_cert_type(X509 *x, EVP_PKEY *pkey) 511{ 512 EVP_PKEY *pk; 513 int ret = -1, i; 514 515 if (pkey == NULL) 516 pk = X509_get_pubkey(x); 517 else 518 pk = pkey; 519 if (pk == NULL) 520 goto err; 521 522 i = pk->type; 523 if (i == EVP_PKEY_RSA) { 524 ret = SSL_PKEY_RSA_ENC; 525 } else if (i == EVP_PKEY_DSA) { 526 ret = SSL_PKEY_DSA_SIGN; 527 } 528#ifndef OPENSSL_NO_EC 529 else if (i == EVP_PKEY_EC) { 530 ret = SSL_PKEY_ECC; 531 } 532#endif 533 534 err: 535 if (!pkey) 536 EVP_PKEY_free(pk); 537 return (ret); 538} 539 540int ssl_verify_alarm_type(long type) 541{ 542 int al; 543 544 switch (type) { 545 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT: 546 case X509_V_ERR_UNABLE_TO_GET_CRL: 547 case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER: 548 al = SSL_AD_UNKNOWN_CA; 549 break; 550 case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE: 551 case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE: 552 case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY: 553 case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD: 554 case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD: 555 case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD: 556 case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD: 557 case X509_V_ERR_CERT_NOT_YET_VALID: 558 case X509_V_ERR_CRL_NOT_YET_VALID: 559 case X509_V_ERR_CERT_UNTRUSTED: 560 case X509_V_ERR_CERT_REJECTED: 561 al = SSL_AD_BAD_CERTIFICATE; 562 break; 563 case X509_V_ERR_CERT_SIGNATURE_FAILURE: 564 case X509_V_ERR_CRL_SIGNATURE_FAILURE: 565 al = SSL_AD_DECRYPT_ERROR; 566 break; 567 case X509_V_ERR_CERT_HAS_EXPIRED: 568 case X509_V_ERR_CRL_HAS_EXPIRED: 569 al = SSL_AD_CERTIFICATE_EXPIRED; 570 break; 571 case X509_V_ERR_CERT_REVOKED: 572 al = SSL_AD_CERTIFICATE_REVOKED; 573 break; 574 case X509_V_ERR_OUT_OF_MEM: 575 al = SSL_AD_INTERNAL_ERROR; 576 break; 577 case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT: 578 case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN: 579 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY: 580 case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE: 581 case X509_V_ERR_CERT_CHAIN_TOO_LONG: 582 case X509_V_ERR_PATH_LENGTH_EXCEEDED: 583 case X509_V_ERR_INVALID_CA: 584 al = SSL_AD_UNKNOWN_CA; 585 break; 586 case X509_V_ERR_APPLICATION_VERIFICATION: 587 al = SSL_AD_HANDSHAKE_FAILURE; 588 break; 589 case X509_V_ERR_INVALID_PURPOSE: 590 al = SSL_AD_UNSUPPORTED_CERTIFICATE; 591 break; 592 default: 593 al = SSL_AD_CERTIFICATE_UNKNOWN; 594 break; 595 } 596 return (al); 597} 598 599int ssl3_setup_buffers(SSL *s) 600{ 601 unsigned char *p; 602 unsigned int extra, headerlen; 603 size_t len; 604 605 if (SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER) 606 headerlen = DTLS1_RT_HEADER_LENGTH; 607 else 608 headerlen = SSL3_RT_HEADER_LENGTH; 609 610 if (s->s3->rbuf.buf == NULL) { 611 if (s->options & SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER) 612 extra = SSL3_RT_MAX_EXTRA; 613 else 614 extra = 0; 615 len = SSL3_RT_MAX_PACKET_SIZE + extra; 616 if ((p = OPENSSL_malloc(len)) == NULL) 617 goto err; 618 s->s3->rbuf.buf = p; 619 s->s3->rbuf.len = len; 620 } 621 622 if (s->s3->wbuf.buf == NULL) { 623 len = SSL3_RT_MAX_PACKET_SIZE; 624 len += headerlen + 256; /* extra space for empty fragment */ 625 if ((p = OPENSSL_malloc(len)) == NULL) 626 goto err; 627 s->s3->wbuf.buf = p; 628 s->s3->wbuf.len = len; 629 } 630 s->packet = &(s->s3->rbuf.buf[0]); 631 return (1); 632 err: 633 SSLerr(SSL_F_SSL3_SETUP_BUFFERS, ERR_R_MALLOC_FAILURE); 634 return (0); 635} 636