1 /* $OpenBSD: ssl_both.c,v 1.17 2020/03/12 17:15:33 jsing 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_cert(xs_ctx); 412 ERR_clear_error(); 413 chain = xs_ctx->chain; 414 } 415 416 for (i = 0; i < sk_X509_num(chain); i++) { 417 x = sk_X509_value(chain, i); 418 if (!ssl3_add_cert(&cert_list, x)) 419 goto err; 420 } 421 422 done: 423 if (!CBB_flush(cbb)) 424 goto err; 425 426 ret = 1; 427 428 err: 429 X509_STORE_CTX_free(xs_ctx); 430 431 return (ret); 432 } 433 434 /* 435 * Obtain handshake message of message type 'mt' (any if mt == -1), 436 * maximum acceptable body length 'max'. 437 * The first four bytes (msg_type and length) are read in state 'st1', 438 * the body is read in state 'stn'. 439 */ 440 long 441 ssl3_get_message(SSL *s, int st1, int stn, int mt, long max, int *ok) 442 { 443 unsigned char *p; 444 uint32_t l; 445 long n; 446 int i, al; 447 CBS cbs; 448 uint8_t u8; 449 450 if (SSL_IS_DTLS(s)) 451 return (dtls1_get_message(s, st1, stn, mt, max, ok)); 452 453 if (S3I(s)->tmp.reuse_message) { 454 S3I(s)->tmp.reuse_message = 0; 455 if ((mt >= 0) && (S3I(s)->tmp.message_type != mt)) { 456 al = SSL_AD_UNEXPECTED_MESSAGE; 457 SSLerror(s, SSL_R_UNEXPECTED_MESSAGE); 458 goto f_err; 459 } 460 *ok = 1; 461 s->internal->init_msg = s->internal->init_buf->data + 4; 462 s->internal->init_num = (int)S3I(s)->tmp.message_size; 463 return s->internal->init_num; 464 } 465 466 p = (unsigned char *)s->internal->init_buf->data; 467 468 /* s->internal->init_num < 4 */ 469 if (S3I(s)->hs.state == st1) { 470 int skip_message; 471 472 do { 473 while (s->internal->init_num < 4) { 474 i = s->method->internal->ssl_read_bytes(s, 475 SSL3_RT_HANDSHAKE, &p[s->internal->init_num], 476 4 - s->internal->init_num, 0); 477 if (i <= 0) { 478 s->internal->rwstate = SSL_READING; 479 *ok = 0; 480 return i; 481 } 482 s->internal->init_num += i; 483 } 484 485 skip_message = 0; 486 if (!s->server && p[0] == SSL3_MT_HELLO_REQUEST) { 487 /* 488 * The server may always send 'Hello Request' 489 * messages -- we are doing a handshake anyway 490 * now, so ignore them if their format is 491 * correct. Does not count for 'Finished' MAC. 492 */ 493 if (p[1] == 0 && p[2] == 0 &&p[3] == 0) { 494 s->internal->init_num = 0; 495 skip_message = 1; 496 497 if (s->internal->msg_callback) 498 s->internal->msg_callback(0, s->version, 499 SSL3_RT_HANDSHAKE, p, 4, s, 500 s->internal->msg_callback_arg); 501 } 502 } 503 } while (skip_message); 504 505 /* s->internal->init_num == 4 */ 506 507 if ((mt >= 0) && (*p != mt)) { 508 al = SSL_AD_UNEXPECTED_MESSAGE; 509 SSLerror(s, SSL_R_UNEXPECTED_MESSAGE); 510 goto f_err; 511 } 512 513 CBS_init(&cbs, p, 4); 514 if (!CBS_get_u8(&cbs, &u8) || 515 !CBS_get_u24(&cbs, &l)) { 516 SSLerror(s, ERR_R_BUF_LIB); 517 goto err; 518 } 519 S3I(s)->tmp.message_type = u8; 520 521 if (l > (unsigned long)max) { 522 al = SSL_AD_ILLEGAL_PARAMETER; 523 SSLerror(s, SSL_R_EXCESSIVE_MESSAGE_SIZE); 524 goto f_err; 525 } 526 if (l && !BUF_MEM_grow_clean(s->internal->init_buf, l + 4)) { 527 SSLerror(s, ERR_R_BUF_LIB); 528 goto err; 529 } 530 S3I(s)->tmp.message_size = l; 531 S3I(s)->hs.state = stn; 532 533 s->internal->init_msg = s->internal->init_buf->data + 4; 534 s->internal->init_num = 0; 535 } 536 537 /* next state (stn) */ 538 p = s->internal->init_msg; 539 n = S3I(s)->tmp.message_size - s->internal->init_num; 540 while (n > 0) { 541 i = s->method->internal->ssl_read_bytes(s, SSL3_RT_HANDSHAKE, 542 &p[s->internal->init_num], n, 0); 543 if (i <= 0) { 544 s->internal->rwstate = SSL_READING; 545 *ok = 0; 546 return i; 547 } 548 s->internal->init_num += i; 549 n -= i; 550 } 551 552 /* If receiving Finished, record MAC of prior handshake messages for 553 * Finished verification. */ 554 if (*s->internal->init_buf->data == SSL3_MT_FINISHED) 555 ssl3_take_mac(s); 556 557 /* Feed this message into MAC computation. */ 558 if (s->internal->mac_packet) { 559 tls1_transcript_record(s, (unsigned char *)s->internal->init_buf->data, 560 s->internal->init_num + 4); 561 562 if (s->internal->msg_callback) 563 s->internal->msg_callback(0, s->version, 564 SSL3_RT_HANDSHAKE, s->internal->init_buf->data, 565 (size_t)s->internal->init_num + 4, s, 566 s->internal->msg_callback_arg); 567 } 568 569 *ok = 1; 570 return (s->internal->init_num); 571 572 f_err: 573 ssl3_send_alert(s, SSL3_AL_FATAL, al); 574 err: 575 *ok = 0; 576 return (-1); 577 } 578 579 int 580 ssl_cert_type(X509 *x, EVP_PKEY *pkey) 581 { 582 EVP_PKEY *pk; 583 int ret = -1, i; 584 585 if (pkey == NULL) 586 pk = X509_get_pubkey(x); 587 else 588 pk = pkey; 589 if (pk == NULL) 590 goto err; 591 592 i = pk->type; 593 if (i == EVP_PKEY_RSA) { 594 ret = SSL_PKEY_RSA_ENC; 595 } else if (i == EVP_PKEY_EC) { 596 ret = SSL_PKEY_ECC; 597 } else if (i == NID_id_GostR3410_2001 || 598 i == NID_id_GostR3410_2001_cc) { 599 ret = SSL_PKEY_GOST01; 600 } 601 602 err: 603 if (!pkey) 604 EVP_PKEY_free(pk); 605 return (ret); 606 } 607 608 int 609 ssl_verify_alarm_type(long type) 610 { 611 int al; 612 613 switch (type) { 614 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT: 615 case X509_V_ERR_UNABLE_TO_GET_CRL: 616 case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER: 617 al = SSL_AD_UNKNOWN_CA; 618 break; 619 case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE: 620 case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE: 621 case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY: 622 case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD: 623 case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD: 624 case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD: 625 case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD: 626 case X509_V_ERR_CERT_NOT_YET_VALID: 627 case X509_V_ERR_CRL_NOT_YET_VALID: 628 case X509_V_ERR_CERT_UNTRUSTED: 629 case X509_V_ERR_CERT_REJECTED: 630 al = SSL_AD_BAD_CERTIFICATE; 631 break; 632 case X509_V_ERR_CERT_SIGNATURE_FAILURE: 633 case X509_V_ERR_CRL_SIGNATURE_FAILURE: 634 al = SSL_AD_DECRYPT_ERROR; 635 break; 636 case X509_V_ERR_CERT_HAS_EXPIRED: 637 case X509_V_ERR_CRL_HAS_EXPIRED: 638 al = SSL_AD_CERTIFICATE_EXPIRED; 639 break; 640 case X509_V_ERR_CERT_REVOKED: 641 al = SSL_AD_CERTIFICATE_REVOKED; 642 break; 643 case X509_V_ERR_OUT_OF_MEM: 644 al = SSL_AD_INTERNAL_ERROR; 645 break; 646 case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT: 647 case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN: 648 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY: 649 case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE: 650 case X509_V_ERR_CERT_CHAIN_TOO_LONG: 651 case X509_V_ERR_PATH_LENGTH_EXCEEDED: 652 case X509_V_ERR_INVALID_CA: 653 al = SSL_AD_UNKNOWN_CA; 654 break; 655 case X509_V_ERR_APPLICATION_VERIFICATION: 656 al = SSL_AD_HANDSHAKE_FAILURE; 657 break; 658 case X509_V_ERR_INVALID_PURPOSE: 659 al = SSL_AD_UNSUPPORTED_CERTIFICATE; 660 break; 661 default: 662 al = SSL_AD_CERTIFICATE_UNKNOWN; 663 break; 664 } 665 return (al); 666 } 667 668 int 669 ssl3_setup_init_buffer(SSL *s) 670 { 671 BUF_MEM *buf = NULL; 672 673 if (s->internal->init_buf != NULL) 674 return (1); 675 676 if ((buf = BUF_MEM_new()) == NULL) 677 goto err; 678 if (!BUF_MEM_grow(buf, SSL3_RT_MAX_PLAIN_LENGTH)) 679 goto err; 680 681 s->internal->init_buf = buf; 682 return (1); 683 684 err: 685 BUF_MEM_free(buf); 686 return (0); 687 } 688 689 int 690 ssl3_setup_read_buffer(SSL *s) 691 { 692 unsigned char *p; 693 size_t len, align, headerlen; 694 695 if (SSL_IS_DTLS(s)) 696 headerlen = DTLS1_RT_HEADER_LENGTH; 697 else 698 headerlen = SSL3_RT_HEADER_LENGTH; 699 700 align = (-SSL3_RT_HEADER_LENGTH) & (SSL3_ALIGN_PAYLOAD - 1); 701 702 if (S3I(s)->rbuf.buf == NULL) { 703 len = SSL3_RT_MAX_PLAIN_LENGTH + 704 SSL3_RT_MAX_ENCRYPTED_OVERHEAD + headerlen + align; 705 if ((p = calloc(1, len)) == NULL) 706 goto err; 707 S3I(s)->rbuf.buf = p; 708 S3I(s)->rbuf.len = len; 709 } 710 711 s->internal->packet = &(S3I(s)->rbuf.buf[0]); 712 return 1; 713 714 err: 715 SSLerror(s, ERR_R_MALLOC_FAILURE); 716 return 0; 717 } 718 719 int 720 ssl3_setup_write_buffer(SSL *s) 721 { 722 unsigned char *p; 723 size_t len, align, headerlen; 724 725 if (SSL_IS_DTLS(s)) 726 headerlen = DTLS1_RT_HEADER_LENGTH + 1; 727 else 728 headerlen = SSL3_RT_HEADER_LENGTH; 729 730 align = (-SSL3_RT_HEADER_LENGTH) & (SSL3_ALIGN_PAYLOAD - 1); 731 732 if (S3I(s)->wbuf.buf == NULL) { 733 len = s->max_send_fragment + 734 SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD + headerlen + align; 735 if (!(s->internal->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS)) 736 len += headerlen + align + 737 SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD; 738 739 if ((p = calloc(1, len)) == NULL) 740 goto err; 741 S3I(s)->wbuf.buf = p; 742 S3I(s)->wbuf.len = len; 743 } 744 745 return 1; 746 747 err: 748 SSLerror(s, ERR_R_MALLOC_FAILURE); 749 return 0; 750 } 751 752 int 753 ssl3_setup_buffers(SSL *s) 754 { 755 if (!ssl3_setup_read_buffer(s)) 756 return 0; 757 if (!ssl3_setup_write_buffer(s)) 758 return 0; 759 return 1; 760 } 761 762 int 763 ssl3_release_write_buffer(SSL *s) 764 { 765 free(S3I(s)->wbuf.buf); 766 S3I(s)->wbuf.buf = NULL; 767 return 1; 768 } 769 770 int 771 ssl3_release_read_buffer(SSL *s) 772 { 773 free(S3I(s)->rbuf.buf); 774 S3I(s)->rbuf.buf = NULL; 775 return 1; 776 } 777