1 /* $OpenBSD: ssl_both.c,v 1.5 2017/01/29 15:20:18 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_finish_mac(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 unsigned char *p; 170 int md_len; 171 172 if (s->internal->state == a) { 173 md_len = TLS1_FINISH_MAC_LENGTH; 174 OPENSSL_assert(md_len <= EVP_MAX_MD_SIZE); 175 176 if (tls1_final_finish_mac(s, sender, slen, 177 S3I(s)->tmp.finish_md) != md_len) 178 return (0); 179 S3I(s)->tmp.finish_md_len = md_len; 180 181 /* Copy finished so we can use it for renegotiation checks. */ 182 if (s->internal->type == SSL_ST_CONNECT) { 183 memcpy(S3I(s)->previous_client_finished, 184 S3I(s)->tmp.finish_md, md_len); 185 S3I(s)->previous_client_finished_len = md_len; 186 } else { 187 memcpy(S3I(s)->previous_server_finished, 188 S3I(s)->tmp.finish_md, md_len); 189 S3I(s)->previous_server_finished_len = md_len; 190 } 191 192 p = ssl3_handshake_msg_start(s, SSL3_MT_FINISHED); 193 memcpy(p, S3I(s)->tmp.finish_md, md_len); 194 ssl3_handshake_msg_finish(s, md_len); 195 196 s->internal->state = b; 197 } 198 199 return (ssl3_handshake_write(s)); 200 } 201 202 /* 203 * ssl3_take_mac calculates the Finished MAC for the handshakes messages seen 204 * so far. 205 */ 206 static void 207 ssl3_take_mac(SSL *s) 208 { 209 const char *sender; 210 int slen; 211 212 /* 213 * If no new cipher setup return immediately: other functions will 214 * set the appropriate error. 215 */ 216 if (S3I(s)->tmp.new_cipher == NULL) 217 return; 218 219 if (s->internal->state & SSL_ST_CONNECT) { 220 sender = TLS_MD_SERVER_FINISH_CONST; 221 slen = TLS_MD_SERVER_FINISH_CONST_SIZE; 222 } else { 223 sender = TLS_MD_CLIENT_FINISH_CONST; 224 slen = TLS_MD_CLIENT_FINISH_CONST_SIZE; 225 } 226 227 S3I(s)->tmp.peer_finish_md_len = 228 tls1_final_finish_mac(s, sender, slen, 229 S3I(s)->tmp.peer_finish_md); 230 } 231 232 int 233 ssl3_get_finished(SSL *s, int a, int b) 234 { 235 int al, ok, md_len; 236 long n; 237 CBS cbs; 238 239 /* should actually be 36+4 :-) */ 240 n = s->method->internal->ssl_get_message(s, a, b, SSL3_MT_FINISHED, 64, &ok); 241 if (!ok) 242 return ((int)n); 243 244 /* If this occurs, we have missed a message */ 245 if (!S3I(s)->change_cipher_spec) { 246 al = SSL_AD_UNEXPECTED_MESSAGE; 247 SSLerror(SSL_R_GOT_A_FIN_BEFORE_A_CCS); 248 goto f_err; 249 } 250 S3I(s)->change_cipher_spec = 0; 251 252 md_len = TLS1_FINISH_MAC_LENGTH; 253 254 if (n < 0) { 255 al = SSL_AD_DECODE_ERROR; 256 SSLerror(SSL_R_BAD_DIGEST_LENGTH); 257 goto f_err; 258 } 259 260 CBS_init(&cbs, s->internal->init_msg, n); 261 262 if (S3I(s)->tmp.peer_finish_md_len != md_len || 263 CBS_len(&cbs) != md_len) { 264 al = SSL_AD_DECODE_ERROR; 265 SSLerror(SSL_R_BAD_DIGEST_LENGTH); 266 goto f_err; 267 } 268 269 if (!CBS_mem_equal(&cbs, S3I(s)->tmp.peer_finish_md, CBS_len(&cbs))) { 270 al = SSL_AD_DECRYPT_ERROR; 271 SSLerror(SSL_R_DIGEST_CHECK_FAILED); 272 goto f_err; 273 } 274 275 /* Copy finished so we can use it for renegotiation checks. */ 276 OPENSSL_assert(md_len <= EVP_MAX_MD_SIZE); 277 if (s->internal->type == SSL_ST_ACCEPT) { 278 memcpy(S3I(s)->previous_client_finished, 279 S3I(s)->tmp.peer_finish_md, md_len); 280 S3I(s)->previous_client_finished_len = md_len; 281 } else { 282 memcpy(S3I(s)->previous_server_finished, 283 S3I(s)->tmp.peer_finish_md, md_len); 284 S3I(s)->previous_server_finished_len = md_len; 285 } 286 287 return (1); 288 f_err: 289 ssl3_send_alert(s, SSL3_AL_FATAL, al); 290 return (0); 291 } 292 293 /* for these 2 messages, we need to 294 * ssl->enc_read_ctx re-init 295 * ssl->s3->internal->read_sequence zero 296 * ssl->s3->internal->read_mac_secret re-init 297 * ssl->session->read_sym_enc assign 298 * ssl->session->read_hash assign 299 */ 300 int 301 ssl3_send_change_cipher_spec(SSL *s, int a, int b) 302 { 303 unsigned char *p; 304 305 if (s->internal->state == a) { 306 p = (unsigned char *)s->internal->init_buf->data; 307 *p = SSL3_MT_CCS; 308 s->internal->init_num = 1; 309 s->internal->init_off = 0; 310 311 s->internal->state = b; 312 } 313 314 /* SSL3_ST_CW_CHANGE_B */ 315 return (ssl3_do_write(s, SSL3_RT_CHANGE_CIPHER_SPEC)); 316 } 317 318 static int 319 ssl3_add_cert(CBB *cbb, X509 *x) 320 { 321 unsigned char *data; 322 int cert_len; 323 int ret = 0; 324 CBB cert; 325 326 if ((cert_len = i2d_X509(x, NULL)) < 0) 327 goto err; 328 329 if (!CBB_add_u24_length_prefixed(cbb, &cert)) 330 goto err; 331 if (!CBB_add_space(&cert, &data, cert_len)) 332 goto err; 333 if (i2d_X509(x, &data) < 0) 334 goto err; 335 if (!CBB_flush(cbb)) 336 goto err; 337 338 ret = 1; 339 340 err: 341 return (ret); 342 } 343 344 int 345 ssl3_output_cert_chain(SSL *s, CBB *cbb, X509 *x) 346 { 347 int no_chain = 0; 348 CBB cert_list; 349 int ret = 0; 350 int i; 351 352 if (!CBB_add_u24_length_prefixed(cbb, &cert_list)) 353 goto err; 354 355 if ((s->internal->mode & SSL_MODE_NO_AUTO_CHAIN) || s->ctx->extra_certs) 356 no_chain = 1; 357 358 /* TLSv1 sends a chain with nothing in it, instead of an alert. */ 359 if (x != NULL) { 360 if (no_chain) { 361 if (!ssl3_add_cert(&cert_list, x)) 362 goto err; 363 } else { 364 X509_STORE_CTX xs_ctx; 365 366 if (!X509_STORE_CTX_init(&xs_ctx, s->ctx->cert_store, 367 x, NULL)) { 368 SSLerror(ERR_R_X509_LIB); 369 goto err; 370 } 371 X509_verify_cert(&xs_ctx); 372 373 /* Don't leave errors in the queue. */ 374 ERR_clear_error(); 375 for (i = 0; i < sk_X509_num(xs_ctx.chain); i++) { 376 x = sk_X509_value(xs_ctx.chain, i); 377 if (!ssl3_add_cert(&cert_list, x)) { 378 X509_STORE_CTX_cleanup(&xs_ctx); 379 goto err; 380 } 381 } 382 X509_STORE_CTX_cleanup(&xs_ctx); 383 } 384 } 385 386 /* Thawte special :-) */ 387 for (i = 0; i < sk_X509_num(s->ctx->extra_certs); i++) { 388 x = sk_X509_value(s->ctx->extra_certs, i); 389 if (!ssl3_add_cert(&cert_list, x)) 390 goto err; 391 } 392 393 if (!CBB_flush(cbb)) 394 goto err; 395 396 ret = 1; 397 398 err: 399 return (ret); 400 } 401 402 /* 403 * Obtain handshake message of message type 'mt' (any if mt == -1), 404 * maximum acceptable body length 'max'. 405 * The first four bytes (msg_type and length) are read in state 'st1', 406 * the body is read in state 'stn'. 407 */ 408 long 409 ssl3_get_message(SSL *s, int st1, int stn, int mt, long max, int *ok) 410 { 411 unsigned char *p; 412 uint32_t l; 413 long n; 414 int i, al; 415 CBS cbs; 416 uint8_t u8; 417 418 if (S3I(s)->tmp.reuse_message) { 419 S3I(s)->tmp.reuse_message = 0; 420 if ((mt >= 0) && (S3I(s)->tmp.message_type != mt)) { 421 al = SSL_AD_UNEXPECTED_MESSAGE; 422 SSLerror(SSL_R_UNEXPECTED_MESSAGE); 423 goto f_err; 424 } 425 *ok = 1; 426 s->internal->init_msg = s->internal->init_buf->data + 4; 427 s->internal->init_num = (int)S3I(s)->tmp.message_size; 428 return s->internal->init_num; 429 } 430 431 p = (unsigned char *)s->internal->init_buf->data; 432 433 /* s->internal->init_num < 4 */ 434 if (s->internal->state == st1) { 435 int skip_message; 436 437 do { 438 while (s->internal->init_num < 4) { 439 i = s->method->internal->ssl_read_bytes(s, 440 SSL3_RT_HANDSHAKE, &p[s->internal->init_num], 441 4 - s->internal->init_num, 0); 442 if (i <= 0) { 443 s->internal->rwstate = SSL_READING; 444 *ok = 0; 445 return i; 446 } 447 s->internal->init_num += i; 448 } 449 450 skip_message = 0; 451 if (!s->server && p[0] == SSL3_MT_HELLO_REQUEST) { 452 /* 453 * The server may always send 'Hello Request' 454 * messages -- we are doing a handshake anyway 455 * now, so ignore them if their format is 456 * correct. Does not count for 'Finished' MAC. 457 */ 458 if (p[1] == 0 && p[2] == 0 &&p[3] == 0) { 459 s->internal->init_num = 0; 460 skip_message = 1; 461 462 if (s->internal->msg_callback) 463 s->internal->msg_callback(0, s->version, 464 SSL3_RT_HANDSHAKE, p, 4, s, 465 s->internal->msg_callback_arg); 466 } 467 } 468 } while (skip_message); 469 470 /* s->internal->init_num == 4 */ 471 472 if ((mt >= 0) && (*p != mt)) { 473 al = SSL_AD_UNEXPECTED_MESSAGE; 474 SSLerror(SSL_R_UNEXPECTED_MESSAGE); 475 goto f_err; 476 } 477 478 CBS_init(&cbs, p, 4); 479 if (!CBS_get_u8(&cbs, &u8) || 480 !CBS_get_u24(&cbs, &l)) { 481 SSLerror(ERR_R_BUF_LIB); 482 goto err; 483 } 484 S3I(s)->tmp.message_type = u8; 485 486 if (l > (unsigned long)max) { 487 al = SSL_AD_ILLEGAL_PARAMETER; 488 SSLerror(SSL_R_EXCESSIVE_MESSAGE_SIZE); 489 goto f_err; 490 } 491 if (l && !BUF_MEM_grow_clean(s->internal->init_buf, l + 4)) { 492 SSLerror(ERR_R_BUF_LIB); 493 goto err; 494 } 495 S3I(s)->tmp.message_size = l; 496 s->internal->state = stn; 497 498 s->internal->init_msg = s->internal->init_buf->data + 4; 499 s->internal->init_num = 0; 500 } 501 502 /* next state (stn) */ 503 p = s->internal->init_msg; 504 n = S3I(s)->tmp.message_size - s->internal->init_num; 505 while (n > 0) { 506 i = s->method->internal->ssl_read_bytes(s, SSL3_RT_HANDSHAKE, 507 &p[s->internal->init_num], n, 0); 508 if (i <= 0) { 509 s->internal->rwstate = SSL_READING; 510 *ok = 0; 511 return i; 512 } 513 s->internal->init_num += i; 514 n -= i; 515 } 516 517 /* If receiving Finished, record MAC of prior handshake messages for 518 * Finished verification. */ 519 if (*s->internal->init_buf->data == SSL3_MT_FINISHED) 520 ssl3_take_mac(s); 521 522 /* Feed this message into MAC computation. */ 523 if (s->internal->mac_packet) { 524 tls1_finish_mac(s, (unsigned char *)s->internal->init_buf->data, 525 s->internal->init_num + 4); 526 527 if (s->internal->msg_callback) 528 s->internal->msg_callback(0, s->version, 529 SSL3_RT_HANDSHAKE, s->internal->init_buf->data, 530 (size_t)s->internal->init_num + 4, s, 531 s->internal->msg_callback_arg); 532 } 533 534 *ok = 1; 535 return (s->internal->init_num); 536 537 f_err: 538 ssl3_send_alert(s, SSL3_AL_FATAL, al); 539 err: 540 *ok = 0; 541 return (-1); 542 } 543 544 int 545 ssl_cert_type(X509 *x, EVP_PKEY *pkey) 546 { 547 EVP_PKEY *pk; 548 int ret = -1, i; 549 550 if (pkey == NULL) 551 pk = X509_get_pubkey(x); 552 else 553 pk = pkey; 554 if (pk == NULL) 555 goto err; 556 557 i = pk->type; 558 if (i == EVP_PKEY_RSA) { 559 ret = SSL_PKEY_RSA_ENC; 560 } else if (i == EVP_PKEY_DSA) { 561 ret = SSL_PKEY_DSA_SIGN; 562 } else if (i == EVP_PKEY_EC) { 563 ret = SSL_PKEY_ECC; 564 } else if (i == NID_id_GostR3410_2001 || 565 i == NID_id_GostR3410_2001_cc) { 566 ret = SSL_PKEY_GOST01; 567 } 568 569 err: 570 if (!pkey) 571 EVP_PKEY_free(pk); 572 return (ret); 573 } 574 575 int 576 ssl_verify_alarm_type(long type) 577 { 578 int al; 579 580 switch (type) { 581 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT: 582 case X509_V_ERR_UNABLE_TO_GET_CRL: 583 case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER: 584 al = SSL_AD_UNKNOWN_CA; 585 break; 586 case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE: 587 case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE: 588 case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY: 589 case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD: 590 case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD: 591 case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD: 592 case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD: 593 case X509_V_ERR_CERT_NOT_YET_VALID: 594 case X509_V_ERR_CRL_NOT_YET_VALID: 595 case X509_V_ERR_CERT_UNTRUSTED: 596 case X509_V_ERR_CERT_REJECTED: 597 al = SSL_AD_BAD_CERTIFICATE; 598 break; 599 case X509_V_ERR_CERT_SIGNATURE_FAILURE: 600 case X509_V_ERR_CRL_SIGNATURE_FAILURE: 601 al = SSL_AD_DECRYPT_ERROR; 602 break; 603 case X509_V_ERR_CERT_HAS_EXPIRED: 604 case X509_V_ERR_CRL_HAS_EXPIRED: 605 al = SSL_AD_CERTIFICATE_EXPIRED; 606 break; 607 case X509_V_ERR_CERT_REVOKED: 608 al = SSL_AD_CERTIFICATE_REVOKED; 609 break; 610 case X509_V_ERR_OUT_OF_MEM: 611 al = SSL_AD_INTERNAL_ERROR; 612 break; 613 case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT: 614 case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN: 615 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY: 616 case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE: 617 case X509_V_ERR_CERT_CHAIN_TOO_LONG: 618 case X509_V_ERR_PATH_LENGTH_EXCEEDED: 619 case X509_V_ERR_INVALID_CA: 620 al = SSL_AD_UNKNOWN_CA; 621 break; 622 case X509_V_ERR_APPLICATION_VERIFICATION: 623 al = SSL_AD_HANDSHAKE_FAILURE; 624 break; 625 case X509_V_ERR_INVALID_PURPOSE: 626 al = SSL_AD_UNSUPPORTED_CERTIFICATE; 627 break; 628 default: 629 al = SSL_AD_CERTIFICATE_UNKNOWN; 630 break; 631 } 632 return (al); 633 } 634 635 int 636 ssl3_setup_init_buffer(SSL *s) 637 { 638 BUF_MEM *buf = NULL; 639 640 if (s->internal->init_buf != NULL) 641 return (1); 642 643 if ((buf = BUF_MEM_new()) == NULL) 644 goto err; 645 if (!BUF_MEM_grow(buf, SSL3_RT_MAX_PLAIN_LENGTH)) 646 goto err; 647 648 s->internal->init_buf = buf; 649 return (1); 650 651 err: 652 BUF_MEM_free(buf); 653 return (0); 654 } 655 656 int 657 ssl3_setup_read_buffer(SSL *s) 658 { 659 unsigned char *p; 660 size_t len, align, headerlen; 661 662 if (SSL_IS_DTLS(s)) 663 headerlen = DTLS1_RT_HEADER_LENGTH; 664 else 665 headerlen = SSL3_RT_HEADER_LENGTH; 666 667 align = (-SSL3_RT_HEADER_LENGTH) & (SSL3_ALIGN_PAYLOAD - 1); 668 669 if (s->s3->rbuf.buf == NULL) { 670 len = SSL3_RT_MAX_PLAIN_LENGTH + 671 SSL3_RT_MAX_ENCRYPTED_OVERHEAD + headerlen + align; 672 if ((p = malloc(len)) == NULL) 673 goto err; 674 s->s3->rbuf.buf = p; 675 s->s3->rbuf.len = len; 676 } 677 678 s->internal->packet = &(s->s3->rbuf.buf[0]); 679 return 1; 680 681 err: 682 SSLerror(ERR_R_MALLOC_FAILURE); 683 return 0; 684 } 685 686 int 687 ssl3_setup_write_buffer(SSL *s) 688 { 689 unsigned char *p; 690 size_t len, align, headerlen; 691 692 if (SSL_IS_DTLS(s)) 693 headerlen = DTLS1_RT_HEADER_LENGTH + 1; 694 else 695 headerlen = SSL3_RT_HEADER_LENGTH; 696 697 align = (-SSL3_RT_HEADER_LENGTH) & (SSL3_ALIGN_PAYLOAD - 1); 698 699 if (s->s3->wbuf.buf == NULL) { 700 len = s->max_send_fragment + 701 SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD + headerlen + align; 702 if (!(s->internal->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS)) 703 len += headerlen + align + 704 SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD; 705 706 if ((p = malloc(len)) == NULL) 707 goto err; 708 s->s3->wbuf.buf = p; 709 s->s3->wbuf.len = len; 710 } 711 712 return 1; 713 714 err: 715 SSLerror(ERR_R_MALLOC_FAILURE); 716 return 0; 717 } 718 719 int 720 ssl3_setup_buffers(SSL *s) 721 { 722 if (!ssl3_setup_read_buffer(s)) 723 return 0; 724 if (!ssl3_setup_write_buffer(s)) 725 return 0; 726 return 1; 727 } 728 729 int 730 ssl3_release_write_buffer(SSL *s) 731 { 732 free(s->s3->wbuf.buf); 733 s->s3->wbuf.buf = NULL; 734 return 1; 735 } 736 737 int 738 ssl3_release_read_buffer(SSL *s) 739 { 740 free(s->s3->rbuf.buf); 741 s->s3->rbuf.buf = NULL; 742 return 1; 743 } 744