1 /* $OpenBSD: ssl_both.c,v 1.24 2021/02/20 14:14:16 tb Exp $ */ 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 <stdio.h> 119 #include <string.h> 120 121 #include "ssl_locl.h" 122 123 #include <openssl/buffer.h> 124 #include <openssl/evp.h> 125 #include <openssl/objects.h> 126 #include <openssl/x509.h> 127 128 #include "bytestring.h" 129 130 /* 131 * Send s->internal->init_buf in records of type 'type' (SSL3_RT_HANDSHAKE or 132 * SSL3_RT_CHANGE_CIPHER_SPEC). 133 */ 134 int 135 ssl3_do_write(SSL *s, int type) 136 { 137 int ret; 138 139 ret = ssl3_write_bytes(s, type, &s->internal->init_buf->data[s->internal->init_off], 140 s->internal->init_num); 141 if (ret < 0) 142 return (-1); 143 144 if (type == SSL3_RT_HANDSHAKE) 145 /* 146 * Should not be done for 'Hello Request's, but in that case 147 * we'll ignore the result anyway. 148 */ 149 tls1_transcript_record(s, 150 (unsigned char *)&s->internal->init_buf->data[s->internal->init_off], ret); 151 152 if (ret == s->internal->init_num) { 153 if (s->internal->msg_callback) 154 s->internal->msg_callback(1, s->version, type, s->internal->init_buf->data, 155 (size_t)(s->internal->init_off + s->internal->init_num), s, 156 s->internal->msg_callback_arg); 157 return (1); 158 } 159 160 s->internal->init_off += ret; 161 s->internal->init_num -= ret; 162 163 return (0); 164 } 165 166 int 167 ssl3_send_finished(SSL *s, int a, int b, const char *sender, int slen) 168 { 169 CBB cbb, finished; 170 int md_len; 171 172 memset(&cbb, 0, sizeof(cbb)); 173 174 if (S3I(s)->hs.state == a) { 175 md_len = TLS1_FINISH_MAC_LENGTH; 176 OPENSSL_assert(md_len <= EVP_MAX_MD_SIZE); 177 178 if (tls1_final_finish_mac(s, sender, slen, 179 S3I(s)->tmp.finish_md) != md_len) 180 return (0); 181 S3I(s)->tmp.finish_md_len = md_len; 182 183 /* Copy finished so we can use it for renegotiation checks. */ 184 if (s->internal->type == SSL_ST_CONNECT) { 185 memcpy(S3I(s)->previous_client_finished, 186 S3I(s)->tmp.finish_md, md_len); 187 S3I(s)->previous_client_finished_len = md_len; 188 } else { 189 memcpy(S3I(s)->previous_server_finished, 190 S3I(s)->tmp.finish_md, md_len); 191 S3I(s)->previous_server_finished_len = md_len; 192 } 193 194 if (!ssl3_handshake_msg_start(s, &cbb, &finished, 195 SSL3_MT_FINISHED)) 196 goto err; 197 if (!CBB_add_bytes(&finished, S3I(s)->tmp.finish_md, md_len)) 198 goto err; 199 if (!ssl3_handshake_msg_finish(s, &cbb)) 200 goto err; 201 202 S3I(s)->hs.state = b; 203 } 204 205 return (ssl3_handshake_write(s)); 206 207 err: 208 CBB_cleanup(&cbb); 209 210 return (-1); 211 } 212 213 /* 214 * ssl3_take_mac calculates the Finished MAC for the handshakes messages seen 215 * so far. 216 */ 217 static void 218 ssl3_take_mac(SSL *s) 219 { 220 const char *sender; 221 int slen; 222 223 /* 224 * If no new cipher setup return immediately: other functions will 225 * set the appropriate error. 226 */ 227 if (S3I(s)->hs.new_cipher == NULL) 228 return; 229 230 if (S3I(s)->hs.state & SSL_ST_CONNECT) { 231 sender = TLS_MD_SERVER_FINISH_CONST; 232 slen = TLS_MD_SERVER_FINISH_CONST_SIZE; 233 } else { 234 sender = TLS_MD_CLIENT_FINISH_CONST; 235 slen = TLS_MD_CLIENT_FINISH_CONST_SIZE; 236 } 237 238 S3I(s)->tmp.peer_finish_md_len = 239 tls1_final_finish_mac(s, sender, slen, 240 S3I(s)->tmp.peer_finish_md); 241 } 242 243 int 244 ssl3_get_finished(SSL *s, int a, int b) 245 { 246 int al, ok, md_len; 247 long n; 248 CBS cbs; 249 250 /* should actually be 36+4 :-) */ 251 n = ssl3_get_message(s, a, b, SSL3_MT_FINISHED, 64, &ok); 252 if (!ok) 253 return ((int)n); 254 255 /* If this occurs, we have missed a message */ 256 if (!S3I(s)->change_cipher_spec) { 257 al = SSL_AD_UNEXPECTED_MESSAGE; 258 SSLerror(s, SSL_R_GOT_A_FIN_BEFORE_A_CCS); 259 goto fatal_err; 260 } 261 S3I(s)->change_cipher_spec = 0; 262 263 md_len = TLS1_FINISH_MAC_LENGTH; 264 265 if (n < 0) { 266 al = SSL_AD_DECODE_ERROR; 267 SSLerror(s, SSL_R_BAD_DIGEST_LENGTH); 268 goto fatal_err; 269 } 270 271 CBS_init(&cbs, s->internal->init_msg, n); 272 273 if (S3I(s)->tmp.peer_finish_md_len != md_len || 274 CBS_len(&cbs) != md_len) { 275 al = SSL_AD_DECODE_ERROR; 276 SSLerror(s, SSL_R_BAD_DIGEST_LENGTH); 277 goto fatal_err; 278 } 279 280 if (!CBS_mem_equal(&cbs, S3I(s)->tmp.peer_finish_md, CBS_len(&cbs))) { 281 al = SSL_AD_DECRYPT_ERROR; 282 SSLerror(s, SSL_R_DIGEST_CHECK_FAILED); 283 goto fatal_err; 284 } 285 286 /* Copy finished so we can use it for renegotiation checks. */ 287 OPENSSL_assert(md_len <= EVP_MAX_MD_SIZE); 288 if (s->internal->type == SSL_ST_ACCEPT) { 289 memcpy(S3I(s)->previous_client_finished, 290 S3I(s)->tmp.peer_finish_md, md_len); 291 S3I(s)->previous_client_finished_len = md_len; 292 } else { 293 memcpy(S3I(s)->previous_server_finished, 294 S3I(s)->tmp.peer_finish_md, md_len); 295 S3I(s)->previous_server_finished_len = md_len; 296 } 297 298 return (1); 299 fatal_err: 300 ssl3_send_alert(s, SSL3_AL_FATAL, al); 301 return (0); 302 } 303 304 int 305 ssl3_send_change_cipher_spec(SSL *s, int a, int b) 306 { 307 size_t outlen; 308 CBB cbb; 309 310 memset(&cbb, 0, sizeof(cbb)); 311 312 if (S3I(s)->hs.state == a) { 313 if (!CBB_init_fixed(&cbb, s->internal->init_buf->data, 314 s->internal->init_buf->length)) 315 goto err; 316 if (!CBB_add_u8(&cbb, SSL3_MT_CCS)) 317 goto err; 318 if (!CBB_finish(&cbb, NULL, &outlen)) 319 goto err; 320 321 if (outlen > INT_MAX) 322 goto err; 323 324 s->internal->init_num = (int)outlen; 325 s->internal->init_off = 0; 326 327 if (SSL_is_dtls(s)) { 328 D1I(s)->handshake_write_seq = 329 D1I(s)->next_handshake_write_seq; 330 dtls1_set_message_header_int(s, SSL3_MT_CCS, 0, 331 D1I(s)->handshake_write_seq, 0, 0); 332 dtls1_buffer_message(s, 1); 333 } 334 335 S3I(s)->hs.state = b; 336 } 337 338 /* SSL3_ST_CW_CHANGE_B */ 339 return ssl3_record_write(s, SSL3_RT_CHANGE_CIPHER_SPEC); 340 341 err: 342 CBB_cleanup(&cbb); 343 344 return -1; 345 } 346 347 static int 348 ssl3_add_cert(CBB *cbb, X509 *x) 349 { 350 unsigned char *data; 351 int cert_len; 352 int ret = 0; 353 CBB cert; 354 355 if ((cert_len = i2d_X509(x, NULL)) < 0) 356 goto err; 357 358 if (!CBB_add_u24_length_prefixed(cbb, &cert)) 359 goto err; 360 if (!CBB_add_space(&cert, &data, cert_len)) 361 goto err; 362 if (i2d_X509(x, &data) < 0) 363 goto err; 364 if (!CBB_flush(cbb)) 365 goto err; 366 367 ret = 1; 368 369 err: 370 return (ret); 371 } 372 373 int 374 ssl3_output_cert_chain(SSL *s, CBB *cbb, CERT_PKEY *cpk) 375 { 376 X509_STORE_CTX *xs_ctx = NULL; 377 STACK_OF(X509) *chain; 378 CBB cert_list; 379 X509 *x; 380 int ret = 0; 381 int i; 382 383 if (!CBB_add_u24_length_prefixed(cbb, &cert_list)) 384 goto err; 385 386 /* Send an empty certificate list when no certificate is available. */ 387 if (cpk == NULL) 388 goto done; 389 390 if ((chain = cpk->chain) == NULL) 391 chain = s->ctx->extra_certs; 392 393 if (chain != NULL || (s->internal->mode & SSL_MODE_NO_AUTO_CHAIN)) { 394 if (!ssl3_add_cert(&cert_list, cpk->x509)) 395 goto err; 396 } else { 397 if ((xs_ctx = X509_STORE_CTX_new()) == NULL) 398 goto err; 399 if (!X509_STORE_CTX_init(xs_ctx, s->ctx->cert_store, 400 cpk->x509, NULL)) { 401 SSLerror(s, ERR_R_X509_LIB); 402 goto err; 403 } 404 X509_VERIFY_PARAM_set_flags(X509_STORE_CTX_get0_param(xs_ctx), 405 X509_V_FLAG_LEGACY_VERIFY); 406 X509_verify_cert(xs_ctx); 407 ERR_clear_error(); 408 chain = xs_ctx->chain; 409 } 410 411 for (i = 0; i < sk_X509_num(chain); i++) { 412 x = sk_X509_value(chain, i); 413 if (!ssl3_add_cert(&cert_list, x)) 414 goto err; 415 } 416 417 done: 418 if (!CBB_flush(cbb)) 419 goto err; 420 421 ret = 1; 422 423 err: 424 X509_STORE_CTX_free(xs_ctx); 425 426 return (ret); 427 } 428 429 /* 430 * Obtain handshake message of message type 'mt' (any if mt == -1), 431 * maximum acceptable body length 'max'. 432 * The first four bytes (msg_type and length) are read in state 'st1', 433 * the body is read in state 'stn'. 434 */ 435 long 436 ssl3_get_message(SSL *s, int st1, int stn, int mt, long max, int *ok) 437 { 438 unsigned char *p; 439 uint32_t l; 440 long n; 441 int i, al; 442 CBS cbs; 443 uint8_t u8; 444 445 if (SSL_is_dtls(s)) 446 return (dtls1_get_message(s, st1, stn, mt, max, ok)); 447 448 if (S3I(s)->tmp.reuse_message) { 449 S3I(s)->tmp.reuse_message = 0; 450 if ((mt >= 0) && (S3I(s)->tmp.message_type != mt)) { 451 al = SSL_AD_UNEXPECTED_MESSAGE; 452 SSLerror(s, SSL_R_UNEXPECTED_MESSAGE); 453 goto fatal_err; 454 } 455 *ok = 1; 456 s->internal->init_msg = s->internal->init_buf->data + 4; 457 s->internal->init_num = (int)S3I(s)->tmp.message_size; 458 return s->internal->init_num; 459 } 460 461 p = (unsigned char *)s->internal->init_buf->data; 462 463 /* s->internal->init_num < 4 */ 464 if (S3I(s)->hs.state == st1) { 465 int skip_message; 466 467 do { 468 while (s->internal->init_num < 4) { 469 i = s->method->internal->ssl_read_bytes(s, 470 SSL3_RT_HANDSHAKE, &p[s->internal->init_num], 471 4 - s->internal->init_num, 0); 472 if (i <= 0) { 473 s->internal->rwstate = SSL_READING; 474 *ok = 0; 475 return i; 476 } 477 s->internal->init_num += i; 478 } 479 480 skip_message = 0; 481 if (!s->server && p[0] == SSL3_MT_HELLO_REQUEST) { 482 /* 483 * The server may always send 'Hello Request' 484 * messages -- we are doing a handshake anyway 485 * now, so ignore them if their format is 486 * correct. Does not count for 'Finished' MAC. 487 */ 488 if (p[1] == 0 && p[2] == 0 &&p[3] == 0) { 489 s->internal->init_num = 0; 490 skip_message = 1; 491 492 if (s->internal->msg_callback) 493 s->internal->msg_callback(0, s->version, 494 SSL3_RT_HANDSHAKE, p, 4, s, 495 s->internal->msg_callback_arg); 496 } 497 } 498 } while (skip_message); 499 500 /* s->internal->init_num == 4 */ 501 502 if ((mt >= 0) && (*p != mt)) { 503 al = SSL_AD_UNEXPECTED_MESSAGE; 504 SSLerror(s, SSL_R_UNEXPECTED_MESSAGE); 505 goto fatal_err; 506 } 507 508 CBS_init(&cbs, p, 4); 509 if (!CBS_get_u8(&cbs, &u8) || 510 !CBS_get_u24(&cbs, &l)) { 511 SSLerror(s, ERR_R_BUF_LIB); 512 goto err; 513 } 514 S3I(s)->tmp.message_type = u8; 515 516 if (l > (unsigned long)max) { 517 al = SSL_AD_ILLEGAL_PARAMETER; 518 SSLerror(s, SSL_R_EXCESSIVE_MESSAGE_SIZE); 519 goto fatal_err; 520 } 521 if (l && !BUF_MEM_grow_clean(s->internal->init_buf, l + 4)) { 522 SSLerror(s, ERR_R_BUF_LIB); 523 goto err; 524 } 525 S3I(s)->tmp.message_size = l; 526 S3I(s)->hs.state = stn; 527 528 s->internal->init_msg = s->internal->init_buf->data + 4; 529 s->internal->init_num = 0; 530 } 531 532 /* next state (stn) */ 533 p = s->internal->init_msg; 534 n = S3I(s)->tmp.message_size - s->internal->init_num; 535 while (n > 0) { 536 i = s->method->internal->ssl_read_bytes(s, SSL3_RT_HANDSHAKE, 537 &p[s->internal->init_num], n, 0); 538 if (i <= 0) { 539 s->internal->rwstate = SSL_READING; 540 *ok = 0; 541 return i; 542 } 543 s->internal->init_num += i; 544 n -= i; 545 } 546 547 /* If receiving Finished, record MAC of prior handshake messages for 548 * Finished verification. */ 549 if (*s->internal->init_buf->data == SSL3_MT_FINISHED) 550 ssl3_take_mac(s); 551 552 /* Feed this message into MAC computation. */ 553 if (s->internal->mac_packet) { 554 tls1_transcript_record(s, (unsigned char *)s->internal->init_buf->data, 555 s->internal->init_num + 4); 556 557 if (s->internal->msg_callback) 558 s->internal->msg_callback(0, s->version, 559 SSL3_RT_HANDSHAKE, s->internal->init_buf->data, 560 (size_t)s->internal->init_num + 4, s, 561 s->internal->msg_callback_arg); 562 } 563 564 *ok = 1; 565 return (s->internal->init_num); 566 567 fatal_err: 568 ssl3_send_alert(s, SSL3_AL_FATAL, al); 569 err: 570 *ok = 0; 571 return (-1); 572 } 573 574 int 575 ssl_cert_type(X509 *x, EVP_PKEY *pkey) 576 { 577 EVP_PKEY *pk; 578 int ret = -1, i; 579 580 if (pkey == NULL) 581 pk = X509_get_pubkey(x); 582 else 583 pk = pkey; 584 if (pk == NULL) 585 goto err; 586 587 i = pk->type; 588 if (i == EVP_PKEY_RSA) { 589 ret = SSL_PKEY_RSA; 590 } else if (i == EVP_PKEY_EC) { 591 ret = SSL_PKEY_ECC; 592 } else if (i == NID_id_GostR3410_2001 || 593 i == NID_id_GostR3410_2001_cc) { 594 ret = SSL_PKEY_GOST01; 595 } 596 597 err: 598 if (!pkey) 599 EVP_PKEY_free(pk); 600 return (ret); 601 } 602 603 int 604 ssl_verify_alarm_type(long type) 605 { 606 int al; 607 608 switch (type) { 609 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT: 610 case X509_V_ERR_UNABLE_TO_GET_CRL: 611 case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER: 612 al = SSL_AD_UNKNOWN_CA; 613 break; 614 case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE: 615 case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE: 616 case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY: 617 case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD: 618 case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD: 619 case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD: 620 case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD: 621 case X509_V_ERR_CERT_NOT_YET_VALID: 622 case X509_V_ERR_CRL_NOT_YET_VALID: 623 case X509_V_ERR_CERT_UNTRUSTED: 624 case X509_V_ERR_CERT_REJECTED: 625 al = SSL_AD_BAD_CERTIFICATE; 626 break; 627 case X509_V_ERR_CERT_SIGNATURE_FAILURE: 628 case X509_V_ERR_CRL_SIGNATURE_FAILURE: 629 al = SSL_AD_DECRYPT_ERROR; 630 break; 631 case X509_V_ERR_CERT_HAS_EXPIRED: 632 case X509_V_ERR_CRL_HAS_EXPIRED: 633 al = SSL_AD_CERTIFICATE_EXPIRED; 634 break; 635 case X509_V_ERR_CERT_REVOKED: 636 al = SSL_AD_CERTIFICATE_REVOKED; 637 break; 638 case X509_V_ERR_OUT_OF_MEM: 639 al = SSL_AD_INTERNAL_ERROR; 640 break; 641 case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT: 642 case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN: 643 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY: 644 case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE: 645 case X509_V_ERR_CERT_CHAIN_TOO_LONG: 646 case X509_V_ERR_PATH_LENGTH_EXCEEDED: 647 case X509_V_ERR_INVALID_CA: 648 al = SSL_AD_UNKNOWN_CA; 649 break; 650 case X509_V_ERR_APPLICATION_VERIFICATION: 651 al = SSL_AD_HANDSHAKE_FAILURE; 652 break; 653 case X509_V_ERR_INVALID_PURPOSE: 654 al = SSL_AD_UNSUPPORTED_CERTIFICATE; 655 break; 656 default: 657 al = SSL_AD_CERTIFICATE_UNKNOWN; 658 break; 659 } 660 return (al); 661 } 662 663 int 664 ssl3_setup_init_buffer(SSL *s) 665 { 666 BUF_MEM *buf = NULL; 667 668 if (s->internal->init_buf != NULL) 669 return (1); 670 671 if ((buf = BUF_MEM_new()) == NULL) 672 goto err; 673 if (!BUF_MEM_grow(buf, SSL3_RT_MAX_PLAIN_LENGTH)) 674 goto err; 675 676 s->internal->init_buf = buf; 677 return (1); 678 679 err: 680 BUF_MEM_free(buf); 681 return (0); 682 } 683 684 void 685 ssl3_release_init_buffer(SSL *s) 686 { 687 BUF_MEM_free(s->internal->init_buf); 688 s->internal->init_buf = NULL; 689 s->internal->init_msg = NULL; 690 s->internal->init_num = 0; 691 s->internal->init_off = 0; 692 } 693 694 int 695 ssl3_setup_read_buffer(SSL *s) 696 { 697 unsigned char *p; 698 size_t len, align, headerlen; 699 700 if (SSL_is_dtls(s)) 701 headerlen = DTLS1_RT_HEADER_LENGTH; 702 else 703 headerlen = SSL3_RT_HEADER_LENGTH; 704 705 align = (-SSL3_RT_HEADER_LENGTH) & (SSL3_ALIGN_PAYLOAD - 1); 706 707 if (S3I(s)->rbuf.buf == NULL) { 708 len = SSL3_RT_MAX_PLAIN_LENGTH + 709 SSL3_RT_MAX_ENCRYPTED_OVERHEAD + headerlen + align; 710 if ((p = calloc(1, len)) == NULL) 711 goto err; 712 S3I(s)->rbuf.buf = p; 713 S3I(s)->rbuf.len = len; 714 } 715 716 s->internal->packet = S3I(s)->rbuf.buf; 717 return 1; 718 719 err: 720 SSLerror(s, ERR_R_MALLOC_FAILURE); 721 return 0; 722 } 723 724 int 725 ssl3_setup_write_buffer(SSL *s) 726 { 727 unsigned char *p; 728 size_t len, align, headerlen; 729 730 if (SSL_is_dtls(s)) 731 headerlen = DTLS1_RT_HEADER_LENGTH + 1; 732 else 733 headerlen = SSL3_RT_HEADER_LENGTH; 734 735 align = (-SSL3_RT_HEADER_LENGTH) & (SSL3_ALIGN_PAYLOAD - 1); 736 737 if (S3I(s)->wbuf.buf == NULL) { 738 len = s->max_send_fragment + 739 SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD + headerlen + align; 740 if (!(s->internal->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS)) 741 len += headerlen + align + 742 SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD; 743 744 if ((p = calloc(1, len)) == NULL) 745 goto err; 746 S3I(s)->wbuf.buf = p; 747 S3I(s)->wbuf.len = len; 748 } 749 750 return 1; 751 752 err: 753 SSLerror(s, ERR_R_MALLOC_FAILURE); 754 return 0; 755 } 756 757 int 758 ssl3_setup_buffers(SSL *s) 759 { 760 if (!ssl3_setup_read_buffer(s)) 761 return 0; 762 if (!ssl3_setup_write_buffer(s)) 763 return 0; 764 return 1; 765 } 766 767 void 768 ssl3_release_buffer(SSL3_BUFFER_INTERNAL *b) 769 { 770 freezero(b->buf, b->len); 771 b->buf = NULL; 772 b->len = 0; 773 } 774 775 void 776 ssl3_release_read_buffer(SSL *s) 777 { 778 ssl3_release_buffer(&S3I(s)->rbuf); 779 } 780 781 void 782 ssl3_release_write_buffer(SSL *s) 783 { 784 ssl3_release_buffer(&S3I(s)->wbuf); 785 } 786