1 /* $OpenBSD: ts.c,v 1.15 2018/02/07 05:47:55 jsing Exp $ */ 2 /* Written by Zoltan Glozik (zglozik@stones.com) for the OpenSSL 3 * project 2002. 4 */ 5 /* ==================================================================== 6 * Copyright (c) 2001 The OpenSSL Project. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in 17 * the documentation and/or other materials provided with the 18 * distribution. 19 * 20 * 3. All advertising materials mentioning features or use of this 21 * software must display the following acknowledgment: 22 * "This product includes software developed by the OpenSSL Project 23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" 24 * 25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 26 * endorse or promote products derived from this software without 27 * prior written permission. For written permission, please contact 28 * licensing@OpenSSL.org. 29 * 30 * 5. Products derived from this software may not be called "OpenSSL" 31 * nor may "OpenSSL" appear in their names without prior written 32 * permission of the OpenSSL Project. 33 * 34 * 6. Redistributions of any form whatsoever must retain the following 35 * acknowledgment: 36 * "This product includes software developed by the OpenSSL Project 37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" 38 * 39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 50 * OF THE POSSIBILITY OF SUCH DAMAGE. 51 * ==================================================================== 52 * 53 * This product includes cryptographic software written by Eric Young 54 * (eay@cryptsoft.com). This product includes software written by Tim 55 * Hudson (tjh@cryptsoft.com). 56 * 57 */ 58 59 #include <stdio.h> 60 #include <stdlib.h> 61 #include <string.h> 62 63 #include "apps.h" 64 65 #include <openssl/bio.h> 66 #include <openssl/bn.h> 67 #include <openssl/err.h> 68 #include <openssl/pem.h> 69 #include <openssl/ts.h> 70 71 /* Length of the nonce of the request in bits (must be a multiple of 8). */ 72 #define NONCE_LENGTH 64 73 74 /* Macro definitions for the configuration file. */ 75 #define ENV_OID_FILE "oid_file" 76 77 /* Local function declarations. */ 78 79 static ASN1_OBJECT *txt2obj(const char *oid); 80 static CONF *load_config_file(const char *configfile); 81 82 /* Query related functions. */ 83 static int query_command(const char *data, char *digest, 84 const EVP_MD * md, const char *policy, int no_nonce, 85 int cert, const char *in, const char *out, int text); 86 static BIO *BIO_open_with_default(const char *file, const char *mode, 87 FILE * default_fp); 88 static TS_REQ *create_query(BIO * data_bio, char *digest, const EVP_MD * md, 89 const char *policy, int no_nonce, int cert); 90 static int create_digest(BIO * input, char *digest, 91 const EVP_MD * md, unsigned char **md_value); 92 static ASN1_INTEGER *create_nonce(int bits); 93 94 /* Reply related functions. */ 95 static int reply_command(CONF * conf, char *section, 96 char *queryfile, char *passin, char *inkey, 97 char *signer, char *chain, const char *policy, 98 char *in, int token_in, char *out, int token_out, 99 int text); 100 static TS_RESP *read_PKCS7(BIO * in_bio); 101 static TS_RESP *create_response(CONF * conf, const char *section, 102 char *queryfile, char *passin, char *inkey, 103 char *signer, char *chain, const char *policy); 104 static ASN1_INTEGER *serial_cb(TS_RESP_CTX * ctx, void *data); 105 static ASN1_INTEGER *next_serial(const char *serialfile); 106 static int save_ts_serial(const char *serialfile, ASN1_INTEGER * serial); 107 108 /* Verify related functions. */ 109 static int verify_command(char *data, char *digest, char *queryfile, 110 char *in, int token_in, 111 char *ca_path, char *ca_file, char *untrusted); 112 static TS_VERIFY_CTX *create_verify_ctx(char *data, char *digest, 113 char *queryfile, 114 char *ca_path, char *ca_file, 115 char *untrusted); 116 static X509_STORE *create_cert_store(char *ca_path, char *ca_file); 117 static int verify_cb(int ok, X509_STORE_CTX * ctx); 118 119 int 120 ts_main(int argc, char **argv) 121 { 122 int ret = 1; 123 char *configfile = NULL; 124 char *section = NULL; 125 CONF *conf = NULL; 126 enum mode { 127 CMD_NONE, CMD_QUERY, CMD_REPLY, CMD_VERIFY 128 } mode = CMD_NONE; 129 char *data = NULL; 130 char *digest = NULL; 131 const EVP_MD *md = NULL; 132 char *policy = NULL; 133 int no_nonce = 0; 134 int cert = 0; 135 char *in = NULL; 136 char *out = NULL; 137 int text = 0; 138 char *queryfile = NULL; 139 char *passin = NULL; /* Password source. */ 140 char *password = NULL; /* Password itself. */ 141 char *inkey = NULL; 142 char *signer = NULL; 143 char *chain = NULL; 144 char *ca_path = NULL; 145 char *ca_file = NULL; 146 char *untrusted = NULL; 147 /* Input is ContentInfo instead of TimeStampResp. */ 148 int token_in = 0; 149 /* Output is ContentInfo instead of TimeStampResp. */ 150 int token_out = 0; 151 152 if (single_execution) { 153 if (pledge("stdio cpath wpath rpath tty", NULL) == -1) { 154 perror("pledge"); 155 exit(1); 156 } 157 } 158 159 for (argc--, argv++; argc > 0; argc--, argv++) { 160 if (strcmp(*argv, "-config") == 0) { 161 if (argc-- < 1) 162 goto usage; 163 configfile = *++argv; 164 } else if (strcmp(*argv, "-section") == 0) { 165 if (argc-- < 1) 166 goto usage; 167 section = *++argv; 168 } else if (strcmp(*argv, "-query") == 0) { 169 if (mode != CMD_NONE) 170 goto usage; 171 mode = CMD_QUERY; 172 } else if (strcmp(*argv, "-data") == 0) { 173 if (argc-- < 1) 174 goto usage; 175 data = *++argv; 176 } else if (strcmp(*argv, "-digest") == 0) { 177 if (argc-- < 1) 178 goto usage; 179 digest = *++argv; 180 } else if (strcmp(*argv, "-policy") == 0) { 181 if (argc-- < 1) 182 goto usage; 183 policy = *++argv; 184 } else if (strcmp(*argv, "-no_nonce") == 0) { 185 no_nonce = 1; 186 } else if (strcmp(*argv, "-cert") == 0) { 187 cert = 1; 188 } else if (strcmp(*argv, "-in") == 0) { 189 if (argc-- < 1) 190 goto usage; 191 in = *++argv; 192 } else if (strcmp(*argv, "-token_in") == 0) { 193 token_in = 1; 194 } else if (strcmp(*argv, "-out") == 0) { 195 if (argc-- < 1) 196 goto usage; 197 out = *++argv; 198 } else if (strcmp(*argv, "-token_out") == 0) { 199 token_out = 1; 200 } else if (strcmp(*argv, "-text") == 0) { 201 text = 1; 202 } else if (strcmp(*argv, "-reply") == 0) { 203 if (mode != CMD_NONE) 204 goto usage; 205 mode = CMD_REPLY; 206 } else if (strcmp(*argv, "-queryfile") == 0) { 207 if (argc-- < 1) 208 goto usage; 209 queryfile = *++argv; 210 } else if (strcmp(*argv, "-passin") == 0) { 211 if (argc-- < 1) 212 goto usage; 213 passin = *++argv; 214 } else if (strcmp(*argv, "-inkey") == 0) { 215 if (argc-- < 1) 216 goto usage; 217 inkey = *++argv; 218 } else if (strcmp(*argv, "-signer") == 0) { 219 if (argc-- < 1) 220 goto usage; 221 signer = *++argv; 222 } else if (strcmp(*argv, "-chain") == 0) { 223 if (argc-- < 1) 224 goto usage; 225 chain = *++argv; 226 } else if (strcmp(*argv, "-verify") == 0) { 227 if (mode != CMD_NONE) 228 goto usage; 229 mode = CMD_VERIFY; 230 } else if (strcmp(*argv, "-CApath") == 0) { 231 if (argc-- < 1) 232 goto usage; 233 ca_path = *++argv; 234 } else if (strcmp(*argv, "-CAfile") == 0) { 235 if (argc-- < 1) 236 goto usage; 237 ca_file = *++argv; 238 } else if (strcmp(*argv, "-untrusted") == 0) { 239 if (argc-- < 1) 240 goto usage; 241 untrusted = *++argv; 242 } else if ((md = EVP_get_digestbyname(*argv + 1)) != NULL) { 243 /* empty. */ 244 } else 245 goto usage; 246 } 247 248 /* Get the password if required. */ 249 if (mode == CMD_REPLY && passin && 250 !app_passwd(bio_err, passin, NULL, &password, NULL)) { 251 BIO_printf(bio_err, "Error getting password.\n"); 252 goto cleanup; 253 } 254 /* 255 * Check consistency of parameters and execute the appropriate 256 * function. 257 */ 258 switch (mode) { 259 case CMD_NONE: 260 goto usage; 261 case CMD_QUERY: 262 /* 263 * Data file and message imprint cannot be specified at the 264 * same time. 265 */ 266 ret = data != NULL && digest != NULL; 267 if (ret) 268 goto usage; 269 /* Load the config file for possible policy OIDs. */ 270 conf = load_config_file(configfile); 271 ret = !query_command(data, digest, md, policy, no_nonce, cert, 272 in, out, text); 273 break; 274 case CMD_REPLY: 275 conf = load_config_file(configfile); 276 if (in == NULL) { 277 ret = !(queryfile != NULL && conf != NULL && !token_in); 278 if (ret) 279 goto usage; 280 } else { 281 /* 'in' and 'queryfile' are exclusive. */ 282 ret = !(queryfile == NULL); 283 if (ret) 284 goto usage; 285 } 286 287 ret = !reply_command(conf, section, queryfile, 288 password, inkey, signer, chain, policy, 289 in, token_in, out, token_out, text); 290 break; 291 case CMD_VERIFY: 292 ret = !(((queryfile && !data && !digest) || 293 (!queryfile && data && !digest) || 294 (!queryfile && !data && digest)) && in != NULL); 295 if (ret) 296 goto usage; 297 298 ret = !verify_command(data, digest, queryfile, in, token_in, 299 ca_path, ca_file, untrusted); 300 } 301 302 goto cleanup; 303 304 usage: 305 BIO_printf(bio_err, "usage:\n" 306 "ts -query [-config configfile] " 307 "[-data file_to_hash] [-digest digest_bytes]" 308 "[-md4|-md5|-sha1|-ripemd160] " 309 "[-policy object_id] [-no_nonce] [-cert] " 310 "[-in request.tsq] [-out request.tsq] [-text]\n"); 311 BIO_printf(bio_err, "or\n" 312 "ts -reply [-config configfile] [-section tsa_section] " 313 "[-queryfile request.tsq] [-passin password] " 314 "[-signer tsa_cert.pem] [-inkey private_key.pem] " 315 "[-chain certs_file.pem] [-policy object_id] " 316 "[-in response.tsr] [-token_in] " 317 "[-out response.tsr] [-token_out] [-text]\n"); 318 BIO_printf(bio_err, "or\n" 319 "ts -verify [-data file_to_hash] [-digest digest_bytes] " 320 "[-queryfile request.tsq] " 321 "-in response.tsr [-token_in] " 322 "-CApath ca_path -CAfile ca_file.pem " 323 "-untrusted cert_file.pem\n"); 324 325 cleanup: 326 /* Clean up. */ 327 NCONF_free(conf); 328 free(password); 329 OBJ_cleanup(); 330 331 return (ret); 332 } 333 334 /* 335 * Configuration file-related function definitions. 336 */ 337 338 static ASN1_OBJECT * 339 txt2obj(const char *oid) 340 { 341 ASN1_OBJECT *oid_obj = NULL; 342 343 if (!(oid_obj = OBJ_txt2obj(oid, 0))) 344 BIO_printf(bio_err, "cannot convert %s to OID\n", oid); 345 346 return oid_obj; 347 } 348 349 static CONF * 350 load_config_file(const char *configfile) 351 { 352 CONF *conf = NULL; 353 long errorline = -1; 354 355 if (!configfile) 356 configfile = getenv("OPENSSL_CONF"); 357 358 if (configfile && 359 (!(conf = NCONF_new(NULL)) || 360 NCONF_load(conf, configfile, &errorline) <= 0)) { 361 if (errorline <= 0) 362 BIO_printf(bio_err, "error loading the config file " 363 "'%s'\n", configfile); 364 else 365 BIO_printf(bio_err, "error on line %ld of config file " 366 "'%s'\n", errorline, configfile); 367 } 368 if (conf != NULL) { 369 const char *p; 370 371 BIO_printf(bio_err, "Using configuration from %s\n", 372 configfile); 373 p = NCONF_get_string(conf, NULL, ENV_OID_FILE); 374 if (p != NULL) { 375 BIO *oid_bio = BIO_new_file(p, "r"); 376 if (!oid_bio) 377 ERR_print_errors(bio_err); 378 else { 379 OBJ_create_objects(oid_bio); 380 BIO_free_all(oid_bio); 381 } 382 } else 383 ERR_clear_error(); 384 if (!add_oid_section(bio_err, conf)) 385 ERR_print_errors(bio_err); 386 } 387 return conf; 388 } 389 390 /* 391 * Query-related method definitions. 392 */ 393 394 static int 395 query_command(const char *data, char *digest, const EVP_MD * md, 396 const char *policy, int no_nonce, int cert, const char *in, 397 const char *out, int text) 398 { 399 int ret = 0; 400 TS_REQ *query = NULL; 401 BIO *in_bio = NULL; 402 BIO *data_bio = NULL; 403 BIO *out_bio = NULL; 404 405 /* Build query object either from file or from scratch. */ 406 if (in != NULL) { 407 if ((in_bio = BIO_new_file(in, "rb")) == NULL) 408 goto end; 409 query = d2i_TS_REQ_bio(in_bio, NULL); 410 } else { 411 /* Open the file if no explicit digest bytes were specified. */ 412 if (!digest && 413 !(data_bio = BIO_open_with_default(data, "rb", stdin))) 414 goto end; 415 /* Creating the query object. */ 416 query = create_query(data_bio, digest, md, 417 policy, no_nonce, cert); 418 /* Saving the random number generator state. */ 419 } 420 if (query == NULL) 421 goto end; 422 423 /* Write query either in ASN.1 or in text format. */ 424 if ((out_bio = BIO_open_with_default(out, "wb", stdout)) == NULL) 425 goto end; 426 if (text) { 427 /* Text output. */ 428 if (!TS_REQ_print_bio(out_bio, query)) 429 goto end; 430 } else { 431 /* ASN.1 output. */ 432 if (!i2d_TS_REQ_bio(out_bio, query)) 433 goto end; 434 } 435 436 ret = 1; 437 438 end: 439 ERR_print_errors(bio_err); 440 441 /* Clean up. */ 442 BIO_free_all(in_bio); 443 BIO_free_all(data_bio); 444 BIO_free_all(out_bio); 445 TS_REQ_free(query); 446 447 return ret; 448 } 449 450 static BIO * 451 BIO_open_with_default(const char *file, const char *mode, FILE * default_fp) 452 { 453 return file == NULL ? BIO_new_fp(default_fp, BIO_NOCLOSE) : 454 BIO_new_file(file, mode); 455 } 456 457 static TS_REQ * 458 create_query(BIO * data_bio, char *digest, const EVP_MD * md, 459 const char *policy, int no_nonce, int cert) 460 { 461 int ret = 0; 462 TS_REQ *ts_req = NULL; 463 int len; 464 TS_MSG_IMPRINT *msg_imprint = NULL; 465 X509_ALGOR *algo = NULL; 466 unsigned char *data = NULL; 467 ASN1_OBJECT *policy_obj = NULL; 468 ASN1_INTEGER *nonce_asn1 = NULL; 469 470 /* Setting default message digest. */ 471 if (!md && !(md = EVP_get_digestbyname("sha1"))) 472 goto err; 473 474 /* Creating request object. */ 475 if (!(ts_req = TS_REQ_new())) 476 goto err; 477 478 /* Setting version. */ 479 if (!TS_REQ_set_version(ts_req, 1)) 480 goto err; 481 482 /* Creating and adding MSG_IMPRINT object. */ 483 if (!(msg_imprint = TS_MSG_IMPRINT_new())) 484 goto err; 485 486 /* Adding algorithm. */ 487 if (!(algo = X509_ALGOR_new())) 488 goto err; 489 if (!(algo->algorithm = OBJ_nid2obj(EVP_MD_type(md)))) 490 goto err; 491 if (!(algo->parameter = ASN1_TYPE_new())) 492 goto err; 493 algo->parameter->type = V_ASN1_NULL; 494 if (!TS_MSG_IMPRINT_set_algo(msg_imprint, algo)) 495 goto err; 496 497 /* Adding message digest. */ 498 if ((len = create_digest(data_bio, digest, md, &data)) == 0) 499 goto err; 500 if (!TS_MSG_IMPRINT_set_msg(msg_imprint, data, len)) 501 goto err; 502 503 if (!TS_REQ_set_msg_imprint(ts_req, msg_imprint)) 504 goto err; 505 506 /* Setting policy if requested. */ 507 if (policy && !(policy_obj = txt2obj(policy))) 508 goto err; 509 if (policy_obj && !TS_REQ_set_policy_id(ts_req, policy_obj)) 510 goto err; 511 512 /* Setting nonce if requested. */ 513 if (!no_nonce && !(nonce_asn1 = create_nonce(NONCE_LENGTH))) 514 goto err; 515 if (nonce_asn1 && !TS_REQ_set_nonce(ts_req, nonce_asn1)) 516 goto err; 517 518 /* Setting certificate request flag if requested. */ 519 if (!TS_REQ_set_cert_req(ts_req, cert)) 520 goto err; 521 522 ret = 1; 523 524 err: 525 if (!ret) { 526 TS_REQ_free(ts_req); 527 ts_req = NULL; 528 BIO_printf(bio_err, "could not create query\n"); 529 } 530 TS_MSG_IMPRINT_free(msg_imprint); 531 X509_ALGOR_free(algo); 532 free(data); 533 ASN1_OBJECT_free(policy_obj); 534 ASN1_INTEGER_free(nonce_asn1); 535 536 return ts_req; 537 } 538 539 static int 540 create_digest(BIO * input, char *digest, const EVP_MD * md, 541 unsigned char **md_value) 542 { 543 int md_value_len; 544 545 md_value_len = EVP_MD_size(md); 546 if (md_value_len < 0) 547 goto err; 548 if (input) { 549 /* Digest must be computed from an input file. */ 550 EVP_MD_CTX md_ctx; 551 unsigned char buffer[4096]; 552 int length; 553 554 *md_value = malloc(md_value_len); 555 if (*md_value == 0) 556 goto err; 557 558 EVP_DigestInit(&md_ctx, md); 559 while ((length = BIO_read(input, buffer, sizeof(buffer))) > 0) { 560 EVP_DigestUpdate(&md_ctx, buffer, length); 561 } 562 EVP_DigestFinal(&md_ctx, *md_value, NULL); 563 } else { 564 /* Digest bytes are specified with digest. */ 565 long digest_len; 566 *md_value = string_to_hex(digest, &digest_len); 567 if (!*md_value || md_value_len != digest_len) { 568 free(*md_value); 569 *md_value = NULL; 570 BIO_printf(bio_err, "bad digest, %d bytes " 571 "must be specified\n", md_value_len); 572 goto err; 573 } 574 } 575 576 return md_value_len; 577 err: 578 return 0; 579 } 580 581 static ASN1_INTEGER * 582 create_nonce(int bits) 583 { 584 unsigned char buf[20]; 585 ASN1_INTEGER *nonce = NULL; 586 int len = (bits - 1) / 8 + 1; 587 int i; 588 589 /* Generating random byte sequence. */ 590 if (len > (int) sizeof(buf)) 591 goto err; 592 arc4random_buf(buf, len); 593 594 /* Find the first non-zero byte and creating ASN1_INTEGER object. */ 595 for (i = 0; i < len && !buf[i]; ++i) 596 ; 597 if (!(nonce = ASN1_INTEGER_new())) 598 goto err; 599 free(nonce->data); 600 /* Allocate at least one byte. */ 601 nonce->length = len - i; 602 if (!(nonce->data = malloc(nonce->length + 1))) 603 goto err; 604 memcpy(nonce->data, buf + i, nonce->length); 605 606 return nonce; 607 608 err: 609 BIO_printf(bio_err, "could not create nonce\n"); 610 ASN1_INTEGER_free(nonce); 611 return NULL; 612 } 613 /* 614 * Reply-related method definitions. 615 */ 616 617 static int 618 reply_command(CONF * conf, char *section, char *queryfile, 619 char *passin, char *inkey, char *signer, char *chain, const char *policy, 620 char *in, int token_in, char *out, int token_out, int text) 621 { 622 int ret = 0; 623 TS_RESP *response = NULL; 624 BIO *in_bio = NULL; 625 BIO *query_bio = NULL; 626 BIO *inkey_bio = NULL; 627 BIO *signer_bio = NULL; 628 BIO *out_bio = NULL; 629 630 /* Build response object either from response or query. */ 631 if (in != NULL) { 632 if ((in_bio = BIO_new_file(in, "rb")) == NULL) 633 goto end; 634 if (token_in) { 635 /* 636 * We have a ContentInfo (PKCS7) object, add 637 * 'granted' status info around it. 638 */ 639 response = read_PKCS7(in_bio); 640 } else { 641 /* We have a ready-made TS_RESP object. */ 642 response = d2i_TS_RESP_bio(in_bio, NULL); 643 } 644 } else { 645 response = create_response(conf, section, queryfile, 646 passin, inkey, signer, chain, 647 policy); 648 if (response) 649 BIO_printf(bio_err, "Response has been generated.\n"); 650 else 651 BIO_printf(bio_err, "Response is not generated.\n"); 652 } 653 if (response == NULL) 654 goto end; 655 656 /* Write response either in ASN.1 or text format. */ 657 if ((out_bio = BIO_open_with_default(out, "wb", stdout)) == NULL) 658 goto end; 659 if (text) { 660 /* Text output. */ 661 if (token_out) { 662 TS_TST_INFO *tst_info = TS_RESP_get_tst_info(response); 663 if (!TS_TST_INFO_print_bio(out_bio, tst_info)) 664 goto end; 665 } else { 666 if (!TS_RESP_print_bio(out_bio, response)) 667 goto end; 668 } 669 } else { 670 /* ASN.1 DER output. */ 671 if (token_out) { 672 PKCS7 *token = TS_RESP_get_token(response); 673 if (!i2d_PKCS7_bio(out_bio, token)) 674 goto end; 675 } else { 676 if (!i2d_TS_RESP_bio(out_bio, response)) 677 goto end; 678 } 679 } 680 681 ret = 1; 682 683 end: 684 ERR_print_errors(bio_err); 685 686 /* Clean up. */ 687 BIO_free_all(in_bio); 688 BIO_free_all(query_bio); 689 BIO_free_all(inkey_bio); 690 BIO_free_all(signer_bio); 691 BIO_free_all(out_bio); 692 TS_RESP_free(response); 693 694 return ret; 695 } 696 697 /* Reads a PKCS7 token and adds default 'granted' status info to it. */ 698 static TS_RESP * 699 read_PKCS7(BIO * in_bio) 700 { 701 int ret = 0; 702 PKCS7 *token = NULL; 703 TS_TST_INFO *tst_info = NULL; 704 TS_RESP *resp = NULL; 705 TS_STATUS_INFO *si = NULL; 706 707 /* Read PKCS7 object and extract the signed time stamp info. */ 708 if (!(token = d2i_PKCS7_bio(in_bio, NULL))) 709 goto end; 710 if (!(tst_info = PKCS7_to_TS_TST_INFO(token))) 711 goto end; 712 713 /* Creating response object. */ 714 if (!(resp = TS_RESP_new())) 715 goto end; 716 717 /* Create granted status info. */ 718 if (!(si = TS_STATUS_INFO_new())) 719 goto end; 720 if (!(ASN1_INTEGER_set(si->status, TS_STATUS_GRANTED))) 721 goto end; 722 if (!TS_RESP_set_status_info(resp, si)) 723 goto end; 724 725 /* Setting encapsulated token. */ 726 TS_RESP_set_tst_info(resp, token, tst_info); 727 token = NULL; /* Ownership is lost. */ 728 tst_info = NULL; /* Ownership is lost. */ 729 730 ret = 1; 731 end: 732 PKCS7_free(token); 733 TS_TST_INFO_free(tst_info); 734 if (!ret) { 735 TS_RESP_free(resp); 736 resp = NULL; 737 } 738 TS_STATUS_INFO_free(si); 739 return resp; 740 } 741 742 static TS_RESP * 743 create_response(CONF * conf, const char *section, 744 char *queryfile, char *passin, char *inkey, 745 char *signer, char *chain, const char *policy) 746 { 747 int ret = 0; 748 TS_RESP *response = NULL; 749 BIO *query_bio = NULL; 750 TS_RESP_CTX *resp_ctx = NULL; 751 752 if (!(query_bio = BIO_new_file(queryfile, "rb"))) 753 goto end; 754 755 /* Getting TSA configuration section. */ 756 if (!(section = TS_CONF_get_tsa_section(conf, section))) 757 goto end; 758 759 /* Setting up response generation context. */ 760 if (!(resp_ctx = TS_RESP_CTX_new())) 761 goto end; 762 763 /* Setting serial number provider callback. */ 764 if (!TS_CONF_set_serial(conf, section, serial_cb, resp_ctx)) 765 goto end; 766 767 /* Setting TSA signer certificate. */ 768 if (!TS_CONF_set_signer_cert(conf, section, signer, resp_ctx)) 769 goto end; 770 771 /* Setting TSA signer certificate chain. */ 772 if (!TS_CONF_set_certs(conf, section, chain, resp_ctx)) 773 goto end; 774 775 /* Setting TSA signer private key. */ 776 if (!TS_CONF_set_signer_key(conf, section, inkey, passin, resp_ctx)) 777 goto end; 778 779 /* Setting default policy OID. */ 780 if (!TS_CONF_set_def_policy(conf, section, policy, resp_ctx)) 781 goto end; 782 783 /* Setting acceptable policy OIDs. */ 784 if (!TS_CONF_set_policies(conf, section, resp_ctx)) 785 goto end; 786 787 /* Setting the acceptable one-way hash algorithms. */ 788 if (!TS_CONF_set_digests(conf, section, resp_ctx)) 789 goto end; 790 791 /* Setting guaranteed time stamp accuracy. */ 792 if (!TS_CONF_set_accuracy(conf, section, resp_ctx)) 793 goto end; 794 795 /* Setting the precision of the time. */ 796 if (!TS_CONF_set_clock_precision_digits(conf, section, resp_ctx)) 797 goto end; 798 799 /* Setting the ordering flaf if requested. */ 800 if (!TS_CONF_set_ordering(conf, section, resp_ctx)) 801 goto end; 802 803 /* Setting the TSA name required flag if requested. */ 804 if (!TS_CONF_set_tsa_name(conf, section, resp_ctx)) 805 goto end; 806 807 /* Setting the ESS cert id chain flag if requested. */ 808 if (!TS_CONF_set_ess_cert_id_chain(conf, section, resp_ctx)) 809 goto end; 810 811 /* Creating the response. */ 812 if (!(response = TS_RESP_create_response(resp_ctx, query_bio))) 813 goto end; 814 815 ret = 1; 816 end: 817 if (!ret) { 818 TS_RESP_free(response); 819 response = NULL; 820 } 821 TS_RESP_CTX_free(resp_ctx); 822 BIO_free_all(query_bio); 823 824 return response; 825 } 826 827 static ASN1_INTEGER * 828 serial_cb(TS_RESP_CTX * ctx, void *data) 829 { 830 const char *serial_file = (const char *) data; 831 ASN1_INTEGER *serial = next_serial(serial_file); 832 833 if (!serial) { 834 TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION, 835 "Error during serial number " 836 "generation."); 837 TS_RESP_CTX_add_failure_info(ctx, 838 TS_INFO_ADD_INFO_NOT_AVAILABLE); 839 } else 840 save_ts_serial(serial_file, serial); 841 842 return serial; 843 } 844 845 static ASN1_INTEGER * 846 next_serial(const char *serialfile) 847 { 848 int ret = 0; 849 BIO *in = NULL; 850 ASN1_INTEGER *serial = NULL; 851 BIGNUM *bn = NULL; 852 853 if (!(serial = ASN1_INTEGER_new())) 854 goto err; 855 856 if (!(in = BIO_new_file(serialfile, "r"))) { 857 ERR_clear_error(); 858 BIO_printf(bio_err, "Warning: could not open file %s for " 859 "reading, using serial number: 1\n", serialfile); 860 if (!ASN1_INTEGER_set(serial, 1)) 861 goto err; 862 } else { 863 char buf[1024]; 864 if (!a2i_ASN1_INTEGER(in, serial, buf, sizeof(buf))) { 865 BIO_printf(bio_err, "unable to load number from %s\n", 866 serialfile); 867 goto err; 868 } 869 if (!(bn = ASN1_INTEGER_to_BN(serial, NULL))) 870 goto err; 871 ASN1_INTEGER_free(serial); 872 serial = NULL; 873 if (!BN_add_word(bn, 1)) 874 goto err; 875 if (!(serial = BN_to_ASN1_INTEGER(bn, NULL))) 876 goto err; 877 } 878 ret = 1; 879 err: 880 if (!ret) { 881 ASN1_INTEGER_free(serial); 882 serial = NULL; 883 } 884 BIO_free_all(in); 885 BN_free(bn); 886 return serial; 887 } 888 889 static int 890 save_ts_serial(const char *serialfile, ASN1_INTEGER * serial) 891 { 892 int ret = 0; 893 BIO *out = NULL; 894 895 if (!(out = BIO_new_file(serialfile, "w"))) 896 goto err; 897 if (i2a_ASN1_INTEGER(out, serial) <= 0) 898 goto err; 899 if (BIO_puts(out, "\n") <= 0) 900 goto err; 901 ret = 1; 902 err: 903 if (!ret) 904 BIO_printf(bio_err, "could not save serial number to %s\n", 905 serialfile); 906 BIO_free_all(out); 907 return ret; 908 } 909 910 /* 911 * Verify-related method definitions. 912 */ 913 914 static int 915 verify_command(char *data, char *digest, char *queryfile, char *in, 916 int token_in, char *ca_path, char *ca_file, char *untrusted) 917 { 918 BIO *in_bio = NULL; 919 PKCS7 *token = NULL; 920 TS_RESP *response = NULL; 921 TS_VERIFY_CTX *verify_ctx = NULL; 922 int ret = 0; 923 924 /* Decode the token (PKCS7) or response (TS_RESP) files. */ 925 if (!(in_bio = BIO_new_file(in, "rb"))) 926 goto end; 927 if (token_in) { 928 if (!(token = d2i_PKCS7_bio(in_bio, NULL))) 929 goto end; 930 } else { 931 if (!(response = d2i_TS_RESP_bio(in_bio, NULL))) 932 goto end; 933 } 934 935 if (!(verify_ctx = create_verify_ctx(data, digest, queryfile, 936 ca_path, ca_file, untrusted))) 937 goto end; 938 939 /* Checking the token or response against the request. */ 940 ret = token_in ? 941 TS_RESP_verify_token(verify_ctx, token) : 942 TS_RESP_verify_response(verify_ctx, response); 943 944 end: 945 printf("Verification: "); 946 if (ret) 947 printf("OK\n"); 948 else { 949 printf("FAILED\n"); 950 /* Print errors, if there are any. */ 951 ERR_print_errors(bio_err); 952 } 953 954 /* Clean up. */ 955 BIO_free_all(in_bio); 956 PKCS7_free(token); 957 TS_RESP_free(response); 958 TS_VERIFY_CTX_free(verify_ctx); 959 return ret; 960 } 961 962 static TS_VERIFY_CTX * 963 create_verify_ctx(char *data, char *digest, char *queryfile, char *ca_path, 964 char *ca_file, char *untrusted) 965 { 966 TS_VERIFY_CTX *ctx = NULL; 967 BIO *input = NULL; 968 TS_REQ *request = NULL; 969 int ret = 0; 970 971 if (data != NULL || digest != NULL) { 972 if (!(ctx = TS_VERIFY_CTX_new())) 973 goto err; 974 ctx->flags = TS_VFY_VERSION | TS_VFY_SIGNER; 975 if (data != NULL) { 976 ctx->flags |= TS_VFY_DATA; 977 if (!(ctx->data = BIO_new_file(data, "rb"))) 978 goto err; 979 } else if (digest != NULL) { 980 long imprint_len; 981 ctx->flags |= TS_VFY_IMPRINT; 982 if (!(ctx->imprint = string_to_hex(digest, 983 &imprint_len))) { 984 BIO_printf(bio_err, "invalid digest string\n"); 985 goto err; 986 } 987 ctx->imprint_len = imprint_len; 988 } 989 } else if (queryfile != NULL) { 990 /* 991 * The request has just to be read, decoded and converted to 992 * a verify context object. 993 */ 994 if (!(input = BIO_new_file(queryfile, "rb"))) 995 goto err; 996 if (!(request = d2i_TS_REQ_bio(input, NULL))) 997 goto err; 998 if (!(ctx = TS_REQ_to_TS_VERIFY_CTX(request, NULL))) 999 goto err; 1000 } else 1001 return NULL; 1002 1003 /* Add the signature verification flag and arguments. */ 1004 ctx->flags |= TS_VFY_SIGNATURE; 1005 1006 /* Initialising the X509_STORE object. */ 1007 if (!(ctx->store = create_cert_store(ca_path, ca_file))) 1008 goto err; 1009 1010 /* Loading untrusted certificates. */ 1011 if (untrusted && !(ctx->certs = TS_CONF_load_certs(untrusted))) 1012 goto err; 1013 1014 ret = 1; 1015 err: 1016 if (!ret) { 1017 TS_VERIFY_CTX_free(ctx); 1018 ctx = NULL; 1019 } 1020 BIO_free_all(input); 1021 TS_REQ_free(request); 1022 return ctx; 1023 } 1024 1025 static X509_STORE * 1026 create_cert_store(char *ca_path, char *ca_file) 1027 { 1028 X509_STORE *cert_ctx = NULL; 1029 X509_LOOKUP *lookup = NULL; 1030 int i; 1031 1032 /* Creating the X509_STORE object. */ 1033 cert_ctx = X509_STORE_new(); 1034 1035 /* Setting the callback for certificate chain verification. */ 1036 X509_STORE_set_verify_cb(cert_ctx, verify_cb); 1037 1038 /* Adding a trusted certificate directory source. */ 1039 if (ca_path) { 1040 lookup = X509_STORE_add_lookup(cert_ctx, 1041 X509_LOOKUP_hash_dir()); 1042 if (lookup == NULL) { 1043 BIO_printf(bio_err, "memory allocation failure\n"); 1044 goto err; 1045 } 1046 i = X509_LOOKUP_add_dir(lookup, ca_path, X509_FILETYPE_PEM); 1047 if (!i) { 1048 BIO_printf(bio_err, "Error loading directory %s\n", 1049 ca_path); 1050 goto err; 1051 } 1052 } 1053 /* Adding a trusted certificate file source. */ 1054 if (ca_file) { 1055 lookup = X509_STORE_add_lookup(cert_ctx, X509_LOOKUP_file()); 1056 if (lookup == NULL) { 1057 BIO_printf(bio_err, "memory allocation failure\n"); 1058 goto err; 1059 } 1060 i = X509_LOOKUP_load_file(lookup, ca_file, X509_FILETYPE_PEM); 1061 if (!i) { 1062 BIO_printf(bio_err, "Error loading file %s\n", ca_file); 1063 goto err; 1064 } 1065 } 1066 return cert_ctx; 1067 err: 1068 X509_STORE_free(cert_ctx); 1069 return NULL; 1070 } 1071 1072 static int 1073 verify_cb(int ok, X509_STORE_CTX * ctx) 1074 { 1075 /* 1076 char buf[256]; 1077 1078 if (!ok) 1079 { 1080 X509_NAME_oneline(X509_get_subject_name(ctx->current_cert), 1081 buf, sizeof(buf)); 1082 printf("%s\n", buf); 1083 printf("error %d at %d depth lookup: %s\n", 1084 ctx->error, ctx->error_depth, 1085 X509_verify_cert_error_string(ctx->error)); 1086 } 1087 */ 1088 1089 return ok; 1090 } 1091