bin/openssl/ts.c

   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 }