1 /* $OpenBSD: ssl_both.c,v 1.20.4.1 2021/02/03 07:06:13 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 f_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 f_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 f_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 f_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 f_err: 300 ssl3_send_alert(s, SSL3_AL_FATAL, al); 301 return (0); 302 } 303 304 /* for these 2 messages, we need to 305 * ssl->enc_read_ctx re-init 306 * ssl->s3->internal->read_sequence zero 307 * ssl->s3->internal->read_mac_secret re-init 308 * ssl->session->read_sym_enc assign 309 * ssl->session->read_hash assign 310 */ 311 int 312 ssl3_send_change_cipher_spec(SSL *s, int a, int b) 313 { 314 size_t outlen; 315 CBB cbb; 316 317 memset(&cbb, 0, sizeof(cbb)); 318 319 if (S3I(s)->hs.state == a) { 320 if (!CBB_init_fixed(&cbb, s->internal->init_buf->data, 321 s->internal->init_buf->length)) 322 goto err; 323 if (!CBB_add_u8(&cbb, SSL3_MT_CCS)) 324 goto err; 325 if (!CBB_finish(&cbb, NULL, &outlen)) 326 goto err; 327 328 if (outlen > INT_MAX) 329 goto err; 330 331 s->internal->init_num = (int)outlen; 332 s->internal->init_off = 0; 333 334 if (SSL_IS_DTLS(s)) { 335 D1I(s)->handshake_write_seq = 336 D1I(s)->next_handshake_write_seq; 337 dtls1_set_message_header_int(s, SSL3_MT_CCS, 0, 338 D1I(s)->handshake_write_seq, 0, 0); 339 dtls1_buffer_message(s, 1); 340 } 341 342 S3I(s)->hs.state = b; 343 } 344 345 /* SSL3_ST_CW_CHANGE_B */ 346 return ssl3_record_write(s, SSL3_RT_CHANGE_CIPHER_SPEC); 347 348 err: 349 CBB_cleanup(&cbb); 350 351 return -1; 352 } 353 354 static int 355 ssl3_add_cert(CBB *cbb, X509 *x) 356 { 357 unsigned char *data; 358 int cert_len; 359 int ret = 0; 360 CBB cert; 361 362 if ((cert_len = i2d_X509(x, NULL)) < 0) 363 goto err; 364 365 if (!CBB_add_u24_length_prefixed(cbb, &cert)) 366 goto err; 367 if (!CBB_add_space(&cert, &data, cert_len)) 368 goto err; 369 if (i2d_X509(x, &data) < 0) 370 goto err; 371 if (!CBB_flush(cbb)) 372 goto err; 373 374 ret = 1; 375 376 err: 377 return (ret); 378 } 379 380 int 381 ssl3_output_cert_chain(SSL *s, CBB *cbb, CERT_PKEY *cpk) 382 { 383 X509_STORE_CTX *xs_ctx = NULL; 384 STACK_OF(X509) *chain; 385 CBB cert_list; 386 X509 *x; 387 int ret = 0; 388 int i; 389 390 if (!CBB_add_u24_length_prefixed(cbb, &cert_list)) 391 goto err; 392 393 /* Send an empty certificate list when no certificate is available. */ 394 if (cpk == NULL) 395 goto done; 396 397 if ((chain = cpk->chain) == NULL) 398 chain = s->ctx->extra_certs; 399 400 if (chain != NULL || (s->internal->mode & SSL_MODE_NO_AUTO_CHAIN)) { 401 if (!ssl3_add_cert(&cert_list, cpk->x509)) 402 goto err; 403 } else { 404 if ((xs_ctx = X509_STORE_CTX_new()) == NULL) 405 goto err; 406 if (!X509_STORE_CTX_init(xs_ctx, s->ctx->cert_store, 407 cpk->x509, NULL)) { 408 SSLerror(s, ERR_R_X509_LIB); 409 goto err; 410 } 411 X509_VERIFY_PARAM_set_flags(X509_STORE_CTX_get0_param(xs_ctx), 412 X509_V_FLAG_LEGACY_VERIFY); 413 X509_verify_cert(xs_ctx); 414 ERR_clear_error(); 415 chain = xs_ctx->chain; 416 } 417 418 for (i = 0; i < sk_X509_num(chain); i++) { 419 x = sk_X509_value(chain, i); 420 if (!ssl3_add_cert(&cert_list, x)) 421 goto err; 422 } 423 424 done: 425 if (!CBB_flush(cbb)) 426 goto err; 427 428 ret = 1; 429 430 err: 431 X509_STORE_CTX_free(xs_ctx); 432 433 return (ret); 434 } 435 436 /* 437 * Obtain handshake message of message type 'mt' (any if mt == -1), 438 * maximum acceptable body length 'max'. 439 * The first four bytes (msg_type and length) are read in state 'st1', 440 * the body is read in state 'stn'. 441 */ 442 long 443 ssl3_get_message(SSL *s, int st1, int stn, int mt, long max, int *ok) 444 { 445 unsigned char *p; 446 uint32_t l; 447 long n; 448 int i, al; 449 CBS cbs; 450 uint8_t u8; 451 452 if (SSL_IS_DTLS(s)) 453 return (dtls1_get_message(s, st1, stn, mt, max, ok)); 454 455 if (S3I(s)->tmp.reuse_message) { 456 S3I(s)->tmp.reuse_message = 0; 457 if ((mt >= 0) && (S3I(s)->tmp.message_type != mt)) { 458 al = SSL_AD_UNEXPECTED_MESSAGE; 459 SSLerror(s, SSL_R_UNEXPECTED_MESSAGE); 460 goto f_err; 461 } 462 *ok = 1; 463 s->internal->init_msg = s->internal->init_buf->data + 4; 464 s->internal->init_num = (int)S3I(s)->tmp.message_size; 465 return s->internal->init_num; 466 } 467 468 p = (unsigned char *)s->internal->init_buf->data; 469 470 /* s->internal->init_num < 4 */ 471 if (S3I(s)->hs.state == st1) { 472 int skip_message; 473 474 do { 475 while (s->internal->init_num < 4) { 476 i = s->method->internal->ssl_read_bytes(s, 477 SSL3_RT_HANDSHAKE, &p[s->internal->init_num], 478 4 - s->internal->init_num, 0); 479 if (i <= 0) { 480 s->internal->rwstate = SSL_READING; 481 *ok = 0; 482 return i; 483 } 484 s->internal->init_num += i; 485 } 486 487 skip_message = 0; 488 if (!s->server && p[0] == SSL3_MT_HELLO_REQUEST) { 489 /* 490 * The server may always send 'Hello Request' 491 * messages -- we are doing a handshake anyway 492 * now, so ignore them if their format is 493 * correct. Does not count for 'Finished' MAC. 494 */ 495 if (p[1] == 0 && p[2] == 0 &&p[3] == 0) { 496 s->internal->init_num = 0; 497 skip_message = 1; 498 499 if (s->internal->msg_callback) 500 s->internal->msg_callback(0, s->version, 501 SSL3_RT_HANDSHAKE, p, 4, s, 502 s->internal->msg_callback_arg); 503 } 504 } 505 } while (skip_message); 506 507 /* s->internal->init_num == 4 */ 508 509 if ((mt >= 0) && (*p != mt)) { 510 al = SSL_AD_UNEXPECTED_MESSAGE; 511 SSLerror(s, SSL_R_UNEXPECTED_MESSAGE); 512 goto f_err; 513 } 514 515 CBS_init(&cbs, p, 4); 516 if (!CBS_get_u8(&cbs, &u8) || 517 !CBS_get_u24(&cbs, &l)) { 518 SSLerror(s, ERR_R_BUF_LIB); 519 goto err; 520 } 521 S3I(s)->tmp.message_type = u8; 522 523 if (l > (unsigned long)max) { 524 al = SSL_AD_ILLEGAL_PARAMETER; 525 SSLerror(s, SSL_R_EXCESSIVE_MESSAGE_SIZE); 526 goto f_err; 527 } 528 if (l && !BUF_MEM_grow_clean(s->internal->init_buf, l + 4)) { 529 SSLerror(s, ERR_R_BUF_LIB); 530 goto err; 531 } 532 S3I(s)->tmp.message_size = l; 533 S3I(s)->hs.state = stn; 534 535 s->internal->init_msg = s->internal->init_buf->data + 4; 536 s->internal->init_num = 0; 537 } 538 539 /* next state (stn) */ 540 p = s->internal->init_msg; 541 n = S3I(s)->tmp.message_size - s->internal->init_num; 542 while (n > 0) { 543 i = s->method->internal->ssl_read_bytes(s, SSL3_RT_HANDSHAKE, 544 &p[s->internal->init_num], n, 0); 545 if (i <= 0) { 546 s->internal->rwstate = SSL_READING; 547 *ok = 0; 548 return i; 549 } 550 s->internal->init_num += i; 551 n -= i; 552 } 553 554 /* If receiving Finished, record MAC of prior handshake messages for 555 * Finished verification. */ 556 if (*s->internal->init_buf->data == SSL3_MT_FINISHED) 557 ssl3_take_mac(s); 558 559 /* Feed this message into MAC computation. */ 560 if (s->internal->mac_packet) { 561 tls1_transcript_record(s, (unsigned char *)s->internal->init_buf->data, 562 s->internal->init_num + 4); 563 564 if (s->internal->msg_callback) 565 s->internal->msg_callback(0, s->version, 566 SSL3_RT_HANDSHAKE, s->internal->init_buf->data, 567 (size_t)s->internal->init_num + 4, s, 568 s->internal->msg_callback_arg); 569 } 570 571 *ok = 1; 572 return (s->internal->init_num); 573 574 f_err: 575 ssl3_send_alert(s, SSL3_AL_FATAL, al); 576 err: 577 *ok = 0; 578 return (-1); 579 } 580 581 int 582 ssl_cert_type(X509 *x, EVP_PKEY *pkey) 583 { 584 EVP_PKEY *pk; 585 int ret = -1, i; 586 587 if (pkey == NULL) 588 pk = X509_get_pubkey(x); 589 else 590 pk = pkey; 591 if (pk == NULL) 592 goto err; 593 594 i = pk->type; 595 if (i == EVP_PKEY_RSA) { 596 ret = SSL_PKEY_RSA; 597 } else if (i == EVP_PKEY_EC) { 598 ret = SSL_PKEY_ECC; 599 } else if (i == NID_id_GostR3410_2001 || 600 i == NID_id_GostR3410_2001_cc) { 601 ret = SSL_PKEY_GOST01; 602 } 603 604 err: 605 if (!pkey) 606 EVP_PKEY_free(pk); 607 return (ret); 608 } 609 610 int 611 ssl_verify_alarm_type(long type) 612 { 613 int al; 614 615 switch (type) { 616 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT: 617 case X509_V_ERR_UNABLE_TO_GET_CRL: 618 case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER: 619 al = SSL_AD_UNKNOWN_CA; 620 break; 621 case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE: 622 case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE: 623 case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY: 624 case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD: 625 case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD: 626 case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD: 627 case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD: 628 case X509_V_ERR_CERT_NOT_YET_VALID: 629 case X509_V_ERR_CRL_NOT_YET_VALID: 630 case X509_V_ERR_CERT_UNTRUSTED: 631 case X509_V_ERR_CERT_REJECTED: 632 al = SSL_AD_BAD_CERTIFICATE; 633 break; 634 case X509_V_ERR_CERT_SIGNATURE_FAILURE: 635 case X509_V_ERR_CRL_SIGNATURE_FAILURE: 636 al = SSL_AD_DECRYPT_ERROR; 637 break; 638 case X509_V_ERR_CERT_HAS_EXPIRED: 639 case X509_V_ERR_CRL_HAS_EXPIRED: 640 al = SSL_AD_CERTIFICATE_EXPIRED; 641 break; 642 case X509_V_ERR_CERT_REVOKED: 643 al = SSL_AD_CERTIFICATE_REVOKED; 644 break; 645 case X509_V_ERR_OUT_OF_MEM: 646 al = SSL_AD_INTERNAL_ERROR; 647 break; 648 case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT: 649 case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN: 650 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY: 651 case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE: 652 case X509_V_ERR_CERT_CHAIN_TOO_LONG: 653 case X509_V_ERR_PATH_LENGTH_EXCEEDED: 654 case X509_V_ERR_INVALID_CA: 655 al = SSL_AD_UNKNOWN_CA; 656 break; 657 case X509_V_ERR_APPLICATION_VERIFICATION: 658 al = SSL_AD_HANDSHAKE_FAILURE; 659 break; 660 case X509_V_ERR_INVALID_PURPOSE: 661 al = SSL_AD_UNSUPPORTED_CERTIFICATE; 662 break; 663 default: 664 al = SSL_AD_CERTIFICATE_UNKNOWN; 665 break; 666 } 667 return (al); 668 } 669 670 int 671 ssl3_setup_init_buffer(SSL *s) 672 { 673 BUF_MEM *buf = NULL; 674 675 if (s->internal->init_buf != NULL) 676 return (1); 677 678 if ((buf = BUF_MEM_new()) == NULL) 679 goto err; 680 if (!BUF_MEM_grow(buf, SSL3_RT_MAX_PLAIN_LENGTH)) 681 goto err; 682 683 s->internal->init_buf = buf; 684 return (1); 685 686 err: 687 BUF_MEM_free(buf); 688 return (0); 689 } 690 691 void 692 ssl3_release_init_buffer(SSL *s) 693 { 694 BUF_MEM_free(s->internal->init_buf); 695 s->internal->init_buf = NULL; 696 s->internal->init_msg = NULL; 697 s->internal->init_num = 0; 698 s->internal->init_off = 0; 699 } 700 701 int 702 ssl3_setup_read_buffer(SSL *s) 703 { 704 unsigned char *p; 705 size_t len, align, headerlen; 706 707 if (SSL_IS_DTLS(s)) 708 headerlen = DTLS1_RT_HEADER_LENGTH; 709 else 710 headerlen = SSL3_RT_HEADER_LENGTH; 711 712 align = (-SSL3_RT_HEADER_LENGTH) & (SSL3_ALIGN_PAYLOAD - 1); 713 714 if (S3I(s)->rbuf.buf == NULL) { 715 len = SSL3_RT_MAX_PLAIN_LENGTH + 716 SSL3_RT_MAX_ENCRYPTED_OVERHEAD + headerlen + align; 717 if ((p = calloc(1, len)) == NULL) 718 goto err; 719 S3I(s)->rbuf.buf = p; 720 S3I(s)->rbuf.len = len; 721 } 722 723 s->internal->packet = S3I(s)->rbuf.buf; 724 return 1; 725 726 err: 727 SSLerror(s, ERR_R_MALLOC_FAILURE); 728 return 0; 729 } 730 731 int 732 ssl3_setup_write_buffer(SSL *s) 733 { 734 unsigned char *p; 735 size_t len, align, headerlen; 736 737 if (SSL_IS_DTLS(s)) 738 headerlen = DTLS1_RT_HEADER_LENGTH + 1; 739 else 740 headerlen = SSL3_RT_HEADER_LENGTH; 741 742 align = (-SSL3_RT_HEADER_LENGTH) & (SSL3_ALIGN_PAYLOAD - 1); 743 744 if (S3I(s)->wbuf.buf == NULL) { 745 len = s->max_send_fragment + 746 SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD + headerlen + align; 747 if (!(s->internal->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS)) 748 len += headerlen + align + 749 SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD; 750 751 if ((p = calloc(1, len)) == NULL) 752 goto err; 753 S3I(s)->wbuf.buf = p; 754 S3I(s)->wbuf.len = len; 755 } 756 757 return 1; 758 759 err: 760 SSLerror(s, ERR_R_MALLOC_FAILURE); 761 return 0; 762 } 763 764 int 765 ssl3_setup_buffers(SSL *s) 766 { 767 if (!ssl3_setup_read_buffer(s)) 768 return 0; 769 if (!ssl3_setup_write_buffer(s)) 770 return 0; 771 return 1; 772 } 773 774 void 775 ssl3_release_buffer(SSL3_BUFFER_INTERNAL *b) 776 { 777 freezero(b->buf, b->len); 778 b->buf = NULL; 779 b->len = 0; 780 } 781 782 void 783 ssl3_release_read_buffer(SSL *s) 784 { 785 ssl3_release_buffer(&S3I(s)->rbuf); 786 } 787 788 void 789 ssl3_release_write_buffer(SSL *s) 790 { 791 ssl3_release_buffer(&S3I(s)->wbuf); 792 } 793