1 /* $OpenBSD: tls_config.c,v 1.43 2017/08/10 18:18:30 jsing Exp $ */ 2 /* 3 * Copyright (c) 2014 Joel Sing <jsing@openbsd.org> 4 * 5 * Permission to use, copy, modify, and distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16 */ 17 18 #include <sys/stat.h> 19 20 #include <ctype.h> 21 #include <errno.h> 22 #include <fcntl.h> 23 #include <stdlib.h> 24 #include <unistd.h> 25 26 #include <tls.h> 27 #include "tls_internal.h" 28 29 static int 30 set_string(const char **dest, const char *src) 31 { 32 free((char *)*dest); 33 *dest = NULL; 34 if (src != NULL) 35 if ((*dest = strdup(src)) == NULL) 36 return -1; 37 return 0; 38 } 39 40 static void * 41 memdup(const void *in, size_t len) 42 { 43 void *out; 44 45 if ((out = malloc(len)) == NULL) 46 return NULL; 47 memcpy(out, in, len); 48 return out; 49 } 50 51 static int 52 set_mem(char **dest, size_t *destlen, const void *src, size_t srclen) 53 { 54 free(*dest); 55 *dest = NULL; 56 *destlen = 0; 57 if (src != NULL) 58 if ((*dest = memdup(src, srclen)) == NULL) 59 return -1; 60 *destlen = srclen; 61 return 0; 62 } 63 64 static struct tls_keypair * 65 tls_keypair_new(void) 66 { 67 return calloc(1, sizeof(struct tls_keypair)); 68 } 69 70 static void 71 tls_keypair_clear_key(struct tls_keypair *keypair) 72 { 73 freezero(keypair->key_mem, keypair->key_len); 74 keypair->key_mem = NULL; 75 keypair->key_len = 0; 76 } 77 78 static int 79 tls_keypair_set_cert_file(struct tls_keypair *keypair, struct tls_error *error, 80 const char *cert_file) 81 { 82 return tls_config_load_file(error, "certificate", cert_file, 83 &keypair->cert_mem, &keypair->cert_len); 84 } 85 86 static int 87 tls_keypair_set_cert_mem(struct tls_keypair *keypair, const uint8_t *cert, 88 size_t len) 89 { 90 return set_mem(&keypair->cert_mem, &keypair->cert_len, cert, len); 91 } 92 93 static int 94 tls_keypair_set_key_file(struct tls_keypair *keypair, struct tls_error *error, 95 const char *key_file) 96 { 97 tls_keypair_clear_key(keypair); 98 return tls_config_load_file(error, "key", key_file, 99 &keypair->key_mem, &keypair->key_len); 100 } 101 102 static int 103 tls_keypair_set_key_mem(struct tls_keypair *keypair, const uint8_t *key, 104 size_t len) 105 { 106 tls_keypair_clear_key(keypair); 107 return set_mem(&keypair->key_mem, &keypair->key_len, key, len); 108 } 109 110 static int 111 tls_keypair_set_ocsp_staple_file(struct tls_keypair *keypair, 112 struct tls_error *error, const char *ocsp_file) 113 { 114 return tls_config_load_file(error, "ocsp", ocsp_file, 115 &keypair->ocsp_staple, &keypair->ocsp_staple_len); 116 } 117 118 static int 119 tls_keypair_set_ocsp_staple_mem(struct tls_keypair *keypair, 120 const uint8_t *staple, size_t len) 121 { 122 return set_mem(&keypair->ocsp_staple, &keypair->ocsp_staple_len, staple, 123 len); 124 } 125 126 static void 127 tls_keypair_clear(struct tls_keypair *keypair) 128 { 129 tls_keypair_set_cert_mem(keypair, NULL, 0); 130 tls_keypair_set_key_mem(keypair, NULL, 0); 131 } 132 133 static void 134 tls_keypair_free(struct tls_keypair *keypair) 135 { 136 if (keypair == NULL) 137 return; 138 139 tls_keypair_clear(keypair); 140 141 free(keypair->cert_mem); 142 free(keypair->key_mem); 143 free(keypair->ocsp_staple); 144 free(keypair->pubkey_hash); 145 146 free(keypair); 147 } 148 149 int 150 tls_config_load_file(struct tls_error *error, const char *filetype, 151 const char *filename, char **buf, size_t *len) 152 { 153 struct stat st; 154 int fd = -1; 155 ssize_t n; 156 157 free(*buf); 158 *buf = NULL; 159 *len = 0; 160 161 if ((fd = open(filename, O_RDONLY)) == -1) { 162 tls_error_set(error, "failed to open %s file '%s'", 163 filetype, filename); 164 goto fail; 165 } 166 if (fstat(fd, &st) != 0) { 167 tls_error_set(error, "failed to stat %s file '%s'", 168 filetype, filename); 169 goto fail; 170 } 171 if (st.st_size < 0) 172 goto fail; 173 *len = (size_t)st.st_size; 174 if ((*buf = malloc(*len)) == NULL) { 175 tls_error_set(error, "failed to allocate buffer for " 176 "%s file", filetype); 177 goto fail; 178 } 179 n = read(fd, *buf, *len); 180 if (n < 0 || (size_t)n != *len) { 181 tls_error_set(error, "failed to read %s file '%s'", 182 filetype, filename); 183 goto fail; 184 } 185 close(fd); 186 return 0; 187 188 fail: 189 if (fd != -1) 190 close(fd); 191 freezero(*buf, *len); 192 *buf = NULL; 193 *len = 0; 194 195 return -1; 196 } 197 198 struct tls_config * 199 tls_config_new(void) 200 { 201 struct tls_config *config; 202 unsigned char sid[TLS_MAX_SESSION_ID_LENGTH]; 203 204 if ((config = calloc(1, sizeof(*config))) == NULL) 205 return (NULL); 206 207 if ((config->keypair = tls_keypair_new()) == NULL) 208 goto err; 209 210 config->refcount = 1; 211 212 /* 213 * Default configuration. 214 */ 215 if (tls_config_set_dheparams(config, "none") != 0) 216 goto err; 217 if (tls_config_set_ecdhecurves(config, "default") != 0) 218 goto err; 219 if (tls_config_set_ciphers(config, "secure") != 0) 220 goto err; 221 222 if (tls_config_set_protocols(config, TLS_PROTOCOLS_DEFAULT) != 0) 223 goto err; 224 if (tls_config_set_verify_depth(config, 6) != 0) 225 goto err; 226 227 /* 228 * Set session ID context to a random value. For the simple case 229 * of a single process server this is good enough. For multiprocess 230 * servers the session ID needs to be set by the caller. 231 */ 232 arc4random_buf(sid, sizeof(sid)); 233 if (tls_config_set_session_id(config, sid, sizeof(sid)) != 0) 234 goto err; 235 config->ticket_keyrev = arc4random(); 236 config->ticket_autorekey = 1; 237 238 tls_config_prefer_ciphers_server(config); 239 240 tls_config_verify(config); 241 242 return (config); 243 244 err: 245 tls_config_free(config); 246 return (NULL); 247 } 248 249 void 250 tls_config_free(struct tls_config *config) 251 { 252 struct tls_keypair *kp, *nkp; 253 254 if (config == NULL) 255 return; 256 257 if (--config->refcount > 0) 258 return; 259 260 for (kp = config->keypair; kp != NULL; kp = nkp) { 261 nkp = kp->next; 262 tls_keypair_free(kp); 263 } 264 265 free(config->error.msg); 266 267 free(config->alpn); 268 free((char *)config->ca_mem); 269 free((char *)config->ca_path); 270 free((char *)config->ciphers); 271 free((char *)config->crl_mem); 272 free(config->ecdhecurves); 273 274 free(config); 275 } 276 277 static void 278 tls_config_keypair_add(struct tls_config *config, struct tls_keypair *keypair) 279 { 280 struct tls_keypair *kp; 281 282 kp = config->keypair; 283 while (kp->next != NULL) 284 kp = kp->next; 285 286 kp->next = keypair; 287 } 288 289 const char * 290 tls_config_error(struct tls_config *config) 291 { 292 return config->error.msg; 293 } 294 295 void 296 tls_config_clear_keys(struct tls_config *config) 297 { 298 struct tls_keypair *kp; 299 300 for (kp = config->keypair; kp != NULL; kp = kp->next) 301 tls_keypair_clear(kp); 302 303 tls_config_set_ca_mem(config, NULL, 0); 304 tls_config_set_crl_mem(config, NULL, 0); 305 } 306 307 int 308 tls_config_parse_protocols(uint32_t *protocols, const char *protostr) 309 { 310 uint32_t proto, protos = 0; 311 char *s, *p, *q; 312 int negate; 313 314 if ((s = strdup(protostr)) == NULL) 315 return (-1); 316 317 q = s; 318 while ((p = strsep(&q, ",:")) != NULL) { 319 while (*p == ' ' || *p == '\t') 320 p++; 321 322 negate = 0; 323 if (*p == '!') { 324 negate = 1; 325 p++; 326 } 327 328 if (negate && protos == 0) 329 protos = TLS_PROTOCOLS_ALL; 330 331 proto = 0; 332 if (strcasecmp(p, "all") == 0 || 333 strcasecmp(p, "legacy") == 0) 334 proto = TLS_PROTOCOLS_ALL; 335 else if (strcasecmp(p, "default") == 0 || 336 strcasecmp(p, "secure") == 0) 337 proto = TLS_PROTOCOLS_DEFAULT; 338 if (strcasecmp(p, "tlsv1") == 0) 339 proto = TLS_PROTOCOL_TLSv1; 340 else if (strcasecmp(p, "tlsv1.0") == 0) 341 proto = TLS_PROTOCOL_TLSv1_0; 342 else if (strcasecmp(p, "tlsv1.1") == 0) 343 proto = TLS_PROTOCOL_TLSv1_1; 344 else if (strcasecmp(p, "tlsv1.2") == 0) 345 proto = TLS_PROTOCOL_TLSv1_2; 346 347 if (proto == 0) { 348 free(s); 349 return (-1); 350 } 351 352 if (negate) 353 protos &= ~proto; 354 else 355 protos |= proto; 356 } 357 358 *protocols = protos; 359 360 free(s); 361 362 return (0); 363 } 364 365 static int 366 tls_config_parse_alpn(struct tls_config *config, const char *alpn, 367 char **alpn_data, size_t *alpn_len) 368 { 369 size_t buf_len, i, len; 370 char *buf = NULL; 371 char *s = NULL; 372 char *p, *q; 373 374 free(*alpn_data); 375 *alpn_data = NULL; 376 *alpn_len = 0; 377 378 if ((buf_len = strlen(alpn) + 1) > 65535) { 379 tls_config_set_errorx(config, "alpn too large"); 380 goto err; 381 } 382 383 if ((buf = malloc(buf_len)) == NULL) { 384 tls_config_set_errorx(config, "out of memory"); 385 goto err; 386 } 387 388 if ((s = strdup(alpn)) == NULL) { 389 tls_config_set_errorx(config, "out of memory"); 390 goto err; 391 } 392 393 i = 0; 394 q = s; 395 while ((p = strsep(&q, ",")) != NULL) { 396 if ((len = strlen(p)) == 0) { 397 tls_config_set_errorx(config, 398 "alpn protocol with zero length"); 399 goto err; 400 } 401 if (len > 255) { 402 tls_config_set_errorx(config, 403 "alpn protocol too long"); 404 goto err; 405 } 406 buf[i++] = len & 0xff; 407 memcpy(&buf[i], p, len); 408 i += len; 409 } 410 411 free(s); 412 413 *alpn_data = buf; 414 *alpn_len = buf_len; 415 416 return (0); 417 418 err: 419 free(buf); 420 free(s); 421 422 return (-1); 423 } 424 425 int 426 tls_config_set_alpn(struct tls_config *config, const char *alpn) 427 { 428 return tls_config_parse_alpn(config, alpn, &config->alpn, 429 &config->alpn_len); 430 } 431 432 static int 433 tls_config_add_keypair_file_internal(struct tls_config *config, 434 const char *cert_file, const char *key_file, const char *ocsp_file) 435 { 436 struct tls_keypair *keypair; 437 438 if ((keypair = tls_keypair_new()) == NULL) 439 return (-1); 440 if (tls_keypair_set_cert_file(keypair, &config->error, cert_file) != 0) 441 goto err; 442 if (tls_keypair_set_key_file(keypair, &config->error, key_file) != 0) 443 goto err; 444 if (ocsp_file != NULL && 445 tls_keypair_set_ocsp_staple_file(keypair, &config->error, 446 ocsp_file) != 0) 447 goto err; 448 449 tls_config_keypair_add(config, keypair); 450 451 return (0); 452 453 err: 454 tls_keypair_free(keypair); 455 return (-1); 456 } 457 458 static int 459 tls_config_add_keypair_mem_internal(struct tls_config *config, const uint8_t *cert, 460 size_t cert_len, const uint8_t *key, size_t key_len, 461 const uint8_t *staple, size_t staple_len) 462 { 463 struct tls_keypair *keypair; 464 465 if ((keypair = tls_keypair_new()) == NULL) 466 return (-1); 467 if (tls_keypair_set_cert_mem(keypair, cert, cert_len) != 0) 468 goto err; 469 if (tls_keypair_set_key_mem(keypair, key, key_len) != 0) 470 goto err; 471 if (staple != NULL && 472 tls_keypair_set_ocsp_staple_mem(keypair, staple, staple_len) != 0) 473 goto err; 474 475 tls_config_keypair_add(config, keypair); 476 477 return (0); 478 479 err: 480 tls_keypair_free(keypair); 481 return (-1); 482 } 483 484 int 485 tls_config_add_keypair_mem(struct tls_config *config, const uint8_t *cert, 486 size_t cert_len, const uint8_t *key, size_t key_len) 487 { 488 return tls_config_add_keypair_mem_internal(config, cert, cert_len, key, 489 key_len, NULL, 0); 490 } 491 492 int 493 tls_config_add_keypair_file(struct tls_config *config, 494 const char *cert_file, const char *key_file) 495 { 496 return tls_config_add_keypair_file_internal(config, cert_file, 497 key_file, NULL); 498 } 499 500 int 501 tls_config_add_keypair_ocsp_mem(struct tls_config *config, const uint8_t *cert, 502 size_t cert_len, const uint8_t *key, size_t key_len, const uint8_t *staple, 503 size_t staple_len) 504 { 505 return tls_config_add_keypair_mem_internal(config, cert, cert_len, key, 506 key_len, staple, staple_len); 507 } 508 509 int 510 tls_config_add_keypair_ocsp_file(struct tls_config *config, 511 const char *cert_file, const char *key_file, const char *ocsp_file) 512 { 513 return tls_config_add_keypair_file_internal(config, cert_file, 514 key_file, ocsp_file); 515 } 516 517 int 518 tls_config_set_ca_file(struct tls_config *config, const char *ca_file) 519 { 520 return tls_config_load_file(&config->error, "CA", ca_file, 521 &config->ca_mem, &config->ca_len); 522 } 523 524 int 525 tls_config_set_ca_path(struct tls_config *config, const char *ca_path) 526 { 527 return set_string(&config->ca_path, ca_path); 528 } 529 530 int 531 tls_config_set_ca_mem(struct tls_config *config, const uint8_t *ca, size_t len) 532 { 533 return set_mem(&config->ca_mem, &config->ca_len, ca, len); 534 } 535 536 int 537 tls_config_set_cert_file(struct tls_config *config, const char *cert_file) 538 { 539 return tls_keypair_set_cert_file(config->keypair, &config->error, 540 cert_file); 541 } 542 543 int 544 tls_config_set_cert_mem(struct tls_config *config, const uint8_t *cert, 545 size_t len) 546 { 547 return tls_keypair_set_cert_mem(config->keypair, cert, len); 548 } 549 550 int 551 tls_config_set_ciphers(struct tls_config *config, const char *ciphers) 552 { 553 SSL_CTX *ssl_ctx = NULL; 554 555 if (ciphers == NULL || 556 strcasecmp(ciphers, "default") == 0 || 557 strcasecmp(ciphers, "secure") == 0) 558 ciphers = TLS_CIPHERS_DEFAULT; 559 else if (strcasecmp(ciphers, "compat") == 0) 560 ciphers = TLS_CIPHERS_COMPAT; 561 else if (strcasecmp(ciphers, "legacy") == 0) 562 ciphers = TLS_CIPHERS_LEGACY; 563 else if (strcasecmp(ciphers, "all") == 0 || 564 strcasecmp(ciphers, "insecure") == 0) 565 ciphers = TLS_CIPHERS_ALL; 566 567 if ((ssl_ctx = SSL_CTX_new(SSLv23_method())) == NULL) { 568 tls_config_set_errorx(config, "out of memory"); 569 goto fail; 570 } 571 if (SSL_CTX_set_cipher_list(ssl_ctx, ciphers) != 1) { 572 tls_config_set_errorx(config, "no ciphers for '%s'", ciphers); 573 goto fail; 574 } 575 576 SSL_CTX_free(ssl_ctx); 577 return set_string(&config->ciphers, ciphers); 578 579 fail: 580 SSL_CTX_free(ssl_ctx); 581 return -1; 582 } 583 584 int 585 tls_config_set_crl_file(struct tls_config *config, const char *crl_file) 586 { 587 return tls_config_load_file(&config->error, "CRL", crl_file, 588 &config->crl_mem, &config->crl_len); 589 } 590 591 int 592 tls_config_set_crl_mem(struct tls_config *config, const uint8_t *crl, 593 size_t len) 594 { 595 return set_mem(&config->crl_mem, &config->crl_len, crl, len); 596 } 597 598 int 599 tls_config_set_dheparams(struct tls_config *config, const char *params) 600 { 601 int keylen; 602 603 if (params == NULL || strcasecmp(params, "none") == 0) 604 keylen = 0; 605 else if (strcasecmp(params, "auto") == 0) 606 keylen = -1; 607 else if (strcasecmp(params, "legacy") == 0) 608 keylen = 1024; 609 else { 610 tls_config_set_errorx(config, "invalid dhe param '%s'", params); 611 return (-1); 612 } 613 614 config->dheparams = keylen; 615 616 return (0); 617 } 618 619 int 620 tls_config_set_ecdhecurve(struct tls_config *config, const char *curve) 621 { 622 if (strchr(curve, ',') != NULL || strchr(curve, ':') != NULL) { 623 tls_config_set_errorx(config, "invalid ecdhe curve '%s'", 624 curve); 625 return (-1); 626 } 627 628 if (curve == NULL || 629 strcasecmp(curve, "none") == 0 || 630 strcasecmp(curve, "auto") == 0) 631 curve = TLS_ECDHE_CURVES; 632 633 return tls_config_set_ecdhecurves(config, curve); 634 } 635 636 int 637 tls_config_set_ecdhecurves(struct tls_config *config, const char *curves) 638 { 639 int *curves_list = NULL, *curves_new; 640 size_t curves_num = 0; 641 char *cs = NULL; 642 char *p, *q; 643 int rv = -1; 644 int nid; 645 646 free(config->ecdhecurves); 647 config->ecdhecurves = NULL; 648 config->ecdhecurves_len = 0; 649 650 if (curves == NULL || strcasecmp(curves, "default") == 0) 651 curves = TLS_ECDHE_CURVES; 652 653 if ((cs = strdup(curves)) == NULL) { 654 tls_config_set_errorx(config, "out of memory"); 655 goto err; 656 } 657 658 q = cs; 659 while ((p = strsep(&q, ",:")) != NULL) { 660 while (*p == ' ' || *p == '\t') 661 p++; 662 663 nid = OBJ_sn2nid(p); 664 if (nid == NID_undef) 665 nid = OBJ_ln2nid(p); 666 if (nid == NID_undef) 667 nid = EC_curve_nist2nid(p); 668 if (nid == NID_undef) { 669 tls_config_set_errorx(config, 670 "invalid ecdhe curve '%s'", p); 671 goto err; 672 } 673 674 if ((curves_new = reallocarray(curves_list, curves_num + 1, 675 sizeof(int))) == NULL) { 676 tls_config_set_errorx(config, "out of memory"); 677 goto err; 678 } 679 curves_list = curves_new; 680 curves_list[curves_num] = nid; 681 curves_num++; 682 } 683 684 config->ecdhecurves = curves_list; 685 config->ecdhecurves_len = curves_num; 686 curves_list = NULL; 687 688 rv = 0; 689 690 err: 691 free(cs); 692 free(curves_list); 693 694 return (rv); 695 } 696 697 int 698 tls_config_set_key_file(struct tls_config *config, const char *key_file) 699 { 700 return tls_keypair_set_key_file(config->keypair, &config->error, 701 key_file); 702 } 703 704 int 705 tls_config_set_key_mem(struct tls_config *config, const uint8_t *key, 706 size_t len) 707 { 708 return tls_keypair_set_key_mem(config->keypair, key, len); 709 } 710 711 static int 712 tls_config_set_keypair_file_internal(struct tls_config *config, 713 const char *cert_file, const char *key_file, const char *ocsp_file) 714 { 715 if (tls_config_set_cert_file(config, cert_file) != 0) 716 return (-1); 717 if (tls_config_set_key_file(config, key_file) != 0) 718 return (-1); 719 if (tls_config_set_key_file(config, key_file) != 0) 720 return (-1); 721 if (ocsp_file != NULL && 722 tls_config_set_ocsp_staple_file(config, ocsp_file) != 0) 723 return (-1); 724 725 return (0); 726 } 727 728 static int 729 tls_config_set_keypair_mem_internal(struct tls_config *config, const uint8_t *cert, 730 size_t cert_len, const uint8_t *key, size_t key_len, 731 const uint8_t *staple, size_t staple_len) 732 { 733 if (tls_config_set_cert_mem(config, cert, cert_len) != 0) 734 return (-1); 735 if (tls_config_set_key_mem(config, key, key_len) != 0) 736 return (-1); 737 if ((staple != NULL) && 738 (tls_config_set_ocsp_staple_mem(config, staple, staple_len) != 0)) 739 return (-1); 740 741 return (0); 742 } 743 744 int 745 tls_config_set_keypair_file(struct tls_config *config, 746 const char *cert_file, const char *key_file) 747 { 748 return tls_config_set_keypair_file_internal(config, cert_file, key_file, 749 NULL); 750 } 751 752 int 753 tls_config_set_keypair_mem(struct tls_config *config, const uint8_t *cert, 754 size_t cert_len, const uint8_t *key, size_t key_len) 755 { 756 return tls_config_set_keypair_mem_internal(config, cert, cert_len, 757 key, key_len, NULL, 0); 758 } 759 760 int 761 tls_config_set_keypair_ocsp_file(struct tls_config *config, 762 const char *cert_file, const char *key_file, const char *ocsp_file) 763 { 764 return tls_config_set_keypair_file_internal(config, cert_file, key_file, 765 ocsp_file); 766 } 767 768 int 769 tls_config_set_keypair_ocsp_mem(struct tls_config *config, const uint8_t *cert, 770 size_t cert_len, const uint8_t *key, size_t key_len, 771 const uint8_t *staple, size_t staple_len) 772 { 773 return tls_config_set_keypair_mem_internal(config, cert, cert_len, 774 key, key_len, staple, staple_len); 775 } 776 777 778 int 779 tls_config_set_protocols(struct tls_config *config, uint32_t protocols) 780 { 781 config->protocols = protocols; 782 783 return (0); 784 } 785 786 int 787 tls_config_set_verify_depth(struct tls_config *config, int verify_depth) 788 { 789 config->verify_depth = verify_depth; 790 791 return (0); 792 } 793 794 void 795 tls_config_prefer_ciphers_client(struct tls_config *config) 796 { 797 config->ciphers_server = 0; 798 } 799 800 void 801 tls_config_prefer_ciphers_server(struct tls_config *config) 802 { 803 config->ciphers_server = 1; 804 } 805 806 void 807 tls_config_insecure_noverifycert(struct tls_config *config) 808 { 809 config->verify_cert = 0; 810 } 811 812 void 813 tls_config_insecure_noverifyname(struct tls_config *config) 814 { 815 config->verify_name = 0; 816 } 817 818 void 819 tls_config_insecure_noverifytime(struct tls_config *config) 820 { 821 config->verify_time = 0; 822 } 823 824 void 825 tls_config_verify(struct tls_config *config) 826 { 827 config->verify_cert = 1; 828 config->verify_name = 1; 829 config->verify_time = 1; 830 } 831 832 void 833 tls_config_ocsp_require_stapling(struct tls_config *config) 834 { 835 config->ocsp_require_stapling = 1; 836 } 837 838 void 839 tls_config_verify_client(struct tls_config *config) 840 { 841 config->verify_client = 1; 842 } 843 844 void 845 tls_config_verify_client_optional(struct tls_config *config) 846 { 847 config->verify_client = 2; 848 } 849 850 void 851 tls_config_skip_private_key_check(struct tls_config *config) 852 { 853 config->skip_private_key_check = 1; 854 } 855 856 int 857 tls_config_set_ocsp_staple_file(struct tls_config *config, const char *staple_file) 858 { 859 return tls_keypair_set_ocsp_staple_file(config->keypair, &config->error, 860 staple_file); 861 } 862 863 int 864 tls_config_set_ocsp_staple_mem(struct tls_config *config, const uint8_t *staple, 865 size_t len) 866 { 867 return tls_keypair_set_ocsp_staple_mem(config->keypair, staple, len); 868 } 869 870 int 871 tls_config_set_session_id(struct tls_config *config, 872 const unsigned char *session_id, size_t len) 873 { 874 if (len > TLS_MAX_SESSION_ID_LENGTH) { 875 tls_config_set_errorx(config, "session ID too large"); 876 return (-1); 877 } 878 memset(config->session_id, 0, sizeof(config->session_id)); 879 memcpy(config->session_id, session_id, len); 880 return (0); 881 } 882 883 int 884 tls_config_set_session_lifetime(struct tls_config *config, int lifetime) 885 { 886 if (lifetime > TLS_MAX_SESSION_TIMEOUT) { 887 tls_config_set_errorx(config, "session lifetime too large"); 888 return (-1); 889 } 890 if (lifetime != 0 && lifetime < TLS_MIN_SESSION_TIMEOUT) { 891 tls_config_set_errorx(config, "session lifetime too small"); 892 return (-1); 893 } 894 895 config->session_lifetime = lifetime; 896 return (0); 897 } 898 899 int 900 tls_config_add_ticket_key(struct tls_config *config, uint32_t keyrev, 901 unsigned char *key, size_t keylen) 902 { 903 struct tls_ticket_key newkey; 904 int i; 905 906 if (TLS_TICKET_KEY_SIZE != keylen || 907 sizeof(newkey.aes_key) + sizeof(newkey.hmac_key) > keylen) { 908 tls_config_set_errorx(config, 909 "wrong amount of ticket key data"); 910 return (-1); 911 } 912 913 keyrev = htonl(keyrev); 914 memset(&newkey, 0, sizeof(newkey)); 915 memcpy(newkey.key_name, &keyrev, sizeof(keyrev)); 916 memcpy(newkey.aes_key, key, sizeof(newkey.aes_key)); 917 memcpy(newkey.hmac_key, key + sizeof(newkey.aes_key), 918 sizeof(newkey.hmac_key)); 919 newkey.time = time(NULL); 920 921 for (i = 0; i < TLS_NUM_TICKETS; i++) { 922 struct tls_ticket_key *tk = &config->ticket_keys[i]; 923 if (memcmp(newkey.key_name, tk->key_name, 924 sizeof(tk->key_name)) != 0) 925 continue; 926 927 /* allow re-entry of most recent key */ 928 if (i == 0 && memcmp(newkey.aes_key, tk->aes_key, 929 sizeof(tk->aes_key)) == 0 && memcmp(newkey.hmac_key, 930 tk->hmac_key, sizeof(tk->hmac_key)) == 0) 931 return (0); 932 tls_config_set_errorx(config, "ticket key already present"); 933 return (-1); 934 } 935 936 memmove(&config->ticket_keys[1], &config->ticket_keys[0], 937 sizeof(config->ticket_keys) - sizeof(config->ticket_keys[0])); 938 config->ticket_keys[0] = newkey; 939 940 config->ticket_autorekey = 0; 941 942 return (0); 943 } 944 945 int 946 tls_config_ticket_autorekey(struct tls_config *config) 947 { 948 unsigned char key[TLS_TICKET_KEY_SIZE]; 949 int rv; 950 951 arc4random_buf(key, sizeof(key)); 952 rv = tls_config_add_ticket_key(config, config->ticket_keyrev++, key, 953 sizeof(key)); 954 config->ticket_autorekey = 1; 955 return (rv); 956 } 957