apps/ts.c

   1 /*
   2  * Copyright 2006-2017 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the OpenSSL license (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 #include <openssl/opensslconf.h>
  11 #ifdef OPENSSL_NO_TS
  12 NON_EMPTY_TRANSLATION_UNIT
  13 #else
  14 # include <stdio.h>
  15 # include <stdlib.h>
  16 # include <string.h>
  17 # include "apps.h"
  18 # include <openssl/bio.h>
  19 # include <openssl/err.h>
  20 # include <openssl/pem.h>
  21 # include <openssl/rand.h>
  22 # include <openssl/ts.h>
  23 # include <openssl/bn.h>
  24
  25 /* Request nonce length, in bits (must be a multiple of 8). */
  26 # define NONCE_LENGTH            64
  27
  28 /* Name of config entry that defines the OID file. */
  29 # define ENV_OID_FILE            "oid_file"
  30
  31 /* Is |EXACTLY_ONE| of three pointers set? */
  32 # define EXACTLY_ONE(a, b, c) \
  33         (( a && !b && !c) || \
  34          ( b && !a && !c) || \
  35          ( c && !a && !b))
  36
  37 static ASN1_OBJECT *txt2obj(const char *oid);
  38 static CONF *load_config_file(const char *configfile);
  39
  40 /* Query related functions. */
  41 static int query_command(const char *data, const char *digest,
  42                          const EVP_MD *md, const char *policy, int no_nonce,
  43                          int cert, const char *in, const char *out, int text);
  44 static TS_REQ *create_query(BIO *data_bio, const char *digest, const EVP_MD *md,
  45                             const char *policy, int no_nonce, int cert);
  46 static int create_digest(BIO *input, const char *digest,
  47                          const EVP_MD *md, unsigned char **md_value);
  48 static ASN1_INTEGER *create_nonce(int bits);
  49
  50 /* Reply related functions. */
  51 static int reply_command(CONF *conf, const char *section, const char *engine,
  52                          const char *queryfile, const char *passin, const char *inkey,
  53                          const EVP_MD *md, const char *signer, const char *chain,
  54                          const char *policy, const char *in, int token_in,
  55                          const char *out, int token_out, int text);
  56 static TS_RESP *read_PKCS7(BIO *in_bio);
  57 static TS_RESP *create_response(CONF *conf, const char *section, const char *engine,
  58                                 const char *queryfile, const char *passin,
  59                                 const char *inkey, const EVP_MD *md, const char *signer,
  60                                 const char *chain, const char *policy);
  61 static ASN1_INTEGER *serial_cb(TS_RESP_CTX *ctx, void *data);
  62 static ASN1_INTEGER *next_serial(const char *serialfile);
  63 static int save_ts_serial(const char *serialfile, ASN1_INTEGER *serial);
  64
  65 /* Verify related functions. */
  66 static int verify_command(const char *data, const char *digest, const char *queryfile,
  67                           const char *in, int token_in,
  68                           const char *CApath, const char *CAfile, const char *untrusted,
  69                           X509_VERIFY_PARAM *vpm);
  70 static TS_VERIFY_CTX *create_verify_ctx(const char *data, const char *digest,
  71                                         const char *queryfile,
  72                                         const char *CApath, const char *CAfile,
  73                                         const char *untrusted,
  74                                         X509_VERIFY_PARAM *vpm);
  75 static X509_STORE *create_cert_store(const char *CApath, const char *CAfile,
  76                                      X509_VERIFY_PARAM *vpm);
  77 static int verify_cb(int ok, X509_STORE_CTX *ctx);
  78
  79 typedef enum OPTION_choice {
  80     OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
  81     OPT_ENGINE, OPT_CONFIG, OPT_SECTION, OPT_QUERY, OPT_DATA,
  82     OPT_DIGEST, OPT_RAND, OPT_TSPOLICY, OPT_NO_NONCE, OPT_CERT,
  83     OPT_IN, OPT_TOKEN_IN, OPT_OUT, OPT_TOKEN_OUT, OPT_TEXT,
  84     OPT_REPLY, OPT_QUERYFILE, OPT_PASSIN, OPT_INKEY, OPT_SIGNER,
  85     OPT_CHAIN, OPT_VERIFY, OPT_CAPATH, OPT_CAFILE, OPT_UNTRUSTED,
  86     OPT_MD, OPT_V_ENUM
  87 } OPTION_CHOICE;
  88
  89 const OPTIONS ts_options[] = {
  90     {"help", OPT_HELP, '-', "Display this summary"},
  91     {"config", OPT_CONFIG, '<', "Configuration file"},
  92     {"section", OPT_SECTION, 's', "Section to use within config file"},
  93     {"query", OPT_QUERY, '-', "Generate a TS query"},
  94     {"data", OPT_DATA, '<', "File to hash"},
  95     {"digest", OPT_DIGEST, 's', "Digest (as a hex string)"},
  96     {"rand", OPT_RAND, 's',
  97      "Load the file(s) into the random number generator"},
  98     {"tspolicy", OPT_TSPOLICY, 's', "Policy OID to use"},
  99     {"no_nonce", OPT_NO_NONCE, '-', "Do not include a nonce"},
 100     {"cert", OPT_CERT, '-', "Put cert request into query"},
 101     {"in", OPT_IN, '<', "Input file"},
 102     {"token_in", OPT_TOKEN_IN, '-', "Input is a PKCS#7 file"},
 103     {"out", OPT_OUT, '>', "Output file"},
 104     {"token_out", OPT_TOKEN_OUT, '-', "Output is a PKCS#7 file"},
 105     {"text", OPT_TEXT, '-', "Output text (not DER)"},
 106     {"reply", OPT_REPLY, '-', "Generate a TS reply"},
 107     {"queryfile", OPT_QUERYFILE, '<', "File containing a TS query"},
 108     {"passin", OPT_PASSIN, 's', "Input file pass phrase source"},
 109     {"inkey", OPT_INKEY, 's', "File with private key for reply"},
 110     {"signer", OPT_SIGNER, 's', "Signer certificate file"},
 111     {"chain", OPT_CHAIN, '<', "File with signer CA chain"},
 112     {"verify", OPT_VERIFY, '-', "Verify a TS response"},
 113     {"CApath", OPT_CAPATH, '/', "Path to trusted CA files"},
 114     {"CAfile", OPT_CAFILE, '<', "File with trusted CA certs"},
 115     {"untrusted", OPT_UNTRUSTED, '<', "File with untrusted certs"},
 116     {"", OPT_MD, '-', "Any supported digest"},
 117 # ifndef OPENSSL_NO_ENGINE
 118     {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
 119 # endif
 120     {OPT_HELP_STR, 1, '-', "\nOptions specific to 'ts -verify': \n"},
 121     OPT_V_OPTIONS,
 122     {OPT_HELP_STR, 1, '-', "\n"},
 123     {NULL}
 124 };
 125
 126 /*
 127  * This command is so complex, special help is needed.
 128  */
 129 static char* opt_helplist[] = {
 130     "Typical uses:",
 131     "ts -query [-rand file...] [-config file] [-data file]",
 132     "          [-digest hexstring] [-tspolicy oid] [-no_nonce] [-cert]",
 133     "          [-in file] [-out file] [-text]",
 134     "  or",
 135     "ts -reply [-config file] [-section tsa_section]",
 136     "          [-queryfile file] [-passin password]",
 137     "          [-signer tsa_cert.pem] [-inkey private_key.pem]",
 138     "          [-chain certs_file.pem] [-tspolicy oid]",
 139     "          [-in file] [-token_in] [-out file] [-token_out]",
 140 # ifndef OPENSSL_NO_ENGINE
 141     "          [-text] [-engine id]",
 142 # else
 143     "          [-text]",
 144 # endif
 145     "  or",
 146     "ts -verify -CApath dir -CAfile file.pem -untrusted file.pem",
 147     "           [-data file] [-digest hexstring]",
 148     "           [-queryfile file] -in file [-token_in]",
 149     "           [[options specific to 'ts -verify']]",
 150     NULL,
 151 };
 152
 153 int ts_main(int argc, char **argv)
 154 {
 155     CONF *conf = NULL;
 156     const char *CAfile = NULL, *untrusted = NULL, *prog;
 157     const char *configfile = default_config_file, *engine = NULL;
 158     const char *section = NULL;
 159     char **helpp;
 160     char *password = NULL;
 161     char *data = NULL, *digest = NULL, *rnd = NULL, *policy = NULL;
 162     char *in = NULL, *out = NULL, *queryfile = NULL, *passin = NULL;
 163     char *inkey = NULL, *signer = NULL, *chain = NULL, *CApath = NULL;
 164     const EVP_MD *md = NULL;
 165     OPTION_CHOICE o, mode = OPT_ERR;
 166     int ret = 1, no_nonce = 0, cert = 0, text = 0;
 167     int vpmtouched = 0;
 168     X509_VERIFY_PARAM *vpm = NULL;
 169     /* Input is ContentInfo instead of TimeStampResp. */
 170     int token_in = 0;
 171     /* Output is ContentInfo instead of TimeStampResp. */
 172     int token_out = 0;
 173
 174     if ((vpm = X509_VERIFY_PARAM_new()) == NULL)
 175         goto end;
 176
 177     prog = opt_init(argc, argv, ts_options);
 178     while ((o = opt_next()) != OPT_EOF) {
 179         switch (o) {
 180         case OPT_EOF:
 181         case OPT_ERR:
 182  opthelp:
 183             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
 184             goto end;
 185         case OPT_HELP:
 186             opt_help(ts_options);
 187             for (helpp = opt_helplist; *helpp; ++helpp)
 188                 BIO_printf(bio_err, "%s\n", *helpp);
 189             ret = 0;
 190             goto end;
 191         case OPT_CONFIG:
 192             configfile = opt_arg();
 193             break;
 194         case OPT_SECTION:
 195             section = opt_arg();
 196             break;
 197         case OPT_QUERY:
 198         case OPT_REPLY:
 199         case OPT_VERIFY:
 200             if (mode != OPT_ERR)
 201                 goto opthelp;
 202             mode = o;
 203             break;
 204         case OPT_DATA:
 205             data = opt_arg();
 206             break;
 207         case OPT_DIGEST:
 208             digest = opt_arg();
 209             break;
 210         case OPT_RAND:
 211             rnd = opt_arg();
 212             break;
 213         case OPT_TSPOLICY:
 214             policy = opt_arg();
 215             break;
 216         case OPT_NO_NONCE:
 217             no_nonce = 1;
 218             break;
 219         case OPT_CERT:
 220             cert = 1;
 221             break;
 222         case OPT_IN:
 223             in = opt_arg();
 224             break;
 225         case OPT_TOKEN_IN:
 226             token_in = 1;
 227             break;
 228         case OPT_OUT:
 229             out = opt_arg();
 230             break;
 231         case OPT_TOKEN_OUT:
 232             token_out = 1;
 233             break;
 234         case OPT_TEXT:
 235             text = 1;
 236             break;
 237         case OPT_QUERYFILE:
 238             queryfile = opt_arg();
 239             break;
 240         case OPT_PASSIN:
 241             passin = opt_arg();
 242             break;
 243         case OPT_INKEY:
 244             inkey = opt_arg();
 245             break;
 246         case OPT_SIGNER:
 247             signer = opt_arg();
 248             break;
 249         case OPT_CHAIN:
 250             chain = opt_arg();
 251             break;
 252         case OPT_CAPATH:
 253             CApath = opt_arg();
 254             break;
 255         case OPT_CAFILE:
 256             CAfile = opt_arg();
 257             break;
 258         case OPT_UNTRUSTED:
 259             untrusted = opt_arg();
 260             break;
 261         case OPT_ENGINE:
 262             engine = opt_arg();
 263             break;
 264         case OPT_MD:
 265             if (!opt_md(opt_unknown(), &md))
 266                 goto opthelp;
 267             break;
 268         case OPT_V_CASES:
 269             if (!opt_verify(o, vpm))
 270                 goto end;
 271             vpmtouched++;
 272             break;
 273         }
 274     }
 275     if (mode == OPT_ERR || opt_num_rest() != 0)
 276         goto opthelp;
 277
 278     /* Seed the random number generator if it is going to be used. */
 279     if (mode == OPT_QUERY && !no_nonce) {
 280         if (!app_RAND_load_file(NULL, 1) && rnd == NULL)
 281             BIO_printf(bio_err, "warning, not much extra random "
 282                        "data, consider using the -rand option\n");
 283         if (rnd != NULL)
 284             BIO_printf(bio_err, "%ld semi-random bytes loaded\n",
 285                        app_RAND_load_files(rnd));
 286     }
 287
 288     if (mode == OPT_REPLY && passin &&
 289         !app_passwd(passin, NULL, &password, NULL)) {
 290         BIO_printf(bio_err, "Error getting password.\n");
 291         goto end;
 292     }
 293
 294     conf = load_config_file(configfile);
 295     if (configfile != default_config_file && !app_load_modules(conf))
 296         goto end;
 297
 298     /* Check parameter consistency and execute the appropriate function. */
 299     if (mode == OPT_QUERY) {
 300         if (vpmtouched)
 301             goto opthelp;
 302         if ((data != NULL) && (digest != NULL))
 303             goto opthelp;
 304         ret = !query_command(data, digest, md, policy, no_nonce, cert,
 305                              in, out, text);
 306     } else if (mode == OPT_REPLY) {
 307         if (vpmtouched)
 308             goto opthelp;
 309         if ((in != NULL) && (queryfile != NULL))
 310             goto opthelp;
 311         if (in == NULL) {
 312             if ((conf == NULL) || (token_in != 0))
 313                 goto opthelp;
 314         }
 315         ret = !reply_command(conf, section, engine, queryfile,
 316                              password, inkey, md, signer, chain, policy,
 317                              in, token_in, out, token_out, text);
 318
 319     } else if (mode == OPT_VERIFY) {
 320         if ((in == NULL) || !EXACTLY_ONE(queryfile, data, digest))
 321             goto opthelp;
 322         ret = !verify_command(data, digest, queryfile, in, token_in,
 323                               CApath, CAfile, untrusted,
 324                               vpmtouched ? vpm : NULL);
 325     } else {
 326         goto opthelp;
 327     }
 328
 329  end:
 330     X509_VERIFY_PARAM_free(vpm);
 331     app_RAND_write_file(NULL);
 332     NCONF_free(conf);
 333     OPENSSL_free(password);
 334     return (ret);
 335 }
 336
 337 /*
 338  * Configuration file-related function definitions.
 339  */
 340
 341 static ASN1_OBJECT *txt2obj(const char *oid)
 342 {
 343     ASN1_OBJECT *oid_obj = NULL;
 344
 345     if ((oid_obj = OBJ_txt2obj(oid, 0)) == NULL)
 346         BIO_printf(bio_err, "cannot convert %s to OID\n", oid);
 347
 348     return oid_obj;
 349 }
 350
 351 static CONF *load_config_file(const char *configfile)
 352 {
 353     CONF *conf = app_load_config(configfile);
 354
 355     if (conf != NULL) {
 356         const char *p;
 357
 358         BIO_printf(bio_err, "Using configuration from %s\n", configfile);
 359         p = NCONF_get_string(conf, NULL, ENV_OID_FILE);
 360         if (p != NULL) {
 361             BIO *oid_bio = BIO_new_file(p, "r");
 362             if (!oid_bio)
 363                 ERR_print_errors(bio_err);
 364             else {
 365                 OBJ_create_objects(oid_bio);
 366                 BIO_free_all(oid_bio);
 367             }
 368         } else
 369             ERR_clear_error();
 370         if (!add_oid_section(conf))
 371             ERR_print_errors(bio_err);
 372     }
 373     return conf;
 374 }
 375
 376 /*
 377  * Query-related method definitions.
 378  */
 379 static int query_command(const char *data, const char *digest, const EVP_MD *md,
 380                          const char *policy, int no_nonce,
 381                          int cert, const char *in, const char *out, int text)
 382 {
 383     int ret = 0;
 384     TS_REQ *query = NULL;
 385     BIO *in_bio = NULL;
 386     BIO *data_bio = NULL;
 387     BIO *out_bio = NULL;
 388
 389     /* Build query object. */
 390     if (in != NULL) {
 391         if ((in_bio = bio_open_default(in, 'r', FORMAT_ASN1)) == NULL)
 392             goto end;
 393         query = d2i_TS_REQ_bio(in_bio, NULL);
 394     } else {
 395         if (digest == NULL
 396             && (data_bio = bio_open_default(data, 'r', FORMAT_ASN1)) == NULL)
 397             goto end;
 398         query = create_query(data_bio, digest, md, policy, no_nonce, cert);
 399     }
 400     if (query == NULL)
 401         goto end;
 402
 403     if (text) {
 404         if ((out_bio = bio_open_default(out, 'w', FORMAT_TEXT)) == NULL)
 405             goto end;
 406         if (!TS_REQ_print_bio(out_bio, query))
 407             goto end;
 408     } else {
 409         if ((out_bio = bio_open_default(out, 'w', FORMAT_ASN1)) == NULL)
 410             goto end;
 411         if (!i2d_TS_REQ_bio(out_bio, query))
 412             goto end;
 413     }
 414
 415     ret = 1;
 416
 417  end:
 418     ERR_print_errors(bio_err);
 419     BIO_free_all(in_bio);
 420     BIO_free_all(data_bio);
 421     BIO_free_all(out_bio);
 422     TS_REQ_free(query);
 423     return ret;
 424 }
 425
 426 static TS_REQ *create_query(BIO *data_bio, const char *digest, const EVP_MD *md,
 427                             const char *policy, int no_nonce, int cert)
 428 {
 429     int ret = 0;
 430     TS_REQ *ts_req = NULL;
 431     int len;
 432     TS_MSG_IMPRINT *msg_imprint = NULL;
 433     X509_ALGOR *algo = NULL;
 434     unsigned char *data = NULL;
 435     ASN1_OBJECT *policy_obj = NULL;
 436     ASN1_INTEGER *nonce_asn1 = NULL;
 437
 438     if (md == NULL && (md = EVP_get_digestbyname("sha1")) == NULL)
 439         goto err;
 440     if ((ts_req = TS_REQ_new()) == NULL)
 441         goto err;
 442     if (!TS_REQ_set_version(ts_req, 1))
 443         goto err;
 444     if ((msg_imprint = TS_MSG_IMPRINT_new()) == NULL)
 445         goto err;
 446     if ((algo = X509_ALGOR_new()) == NULL)
 447         goto err;
 448     if ((algo->algorithm = OBJ_nid2obj(EVP_MD_type(md))) == NULL)
 449         goto err;
 450     if ((algo->parameter = ASN1_TYPE_new()) == NULL)
 451         goto err;
 452     algo->parameter->type = V_ASN1_NULL;
 453     if (!TS_MSG_IMPRINT_set_algo(msg_imprint, algo))
 454         goto err;
 455     if ((len = create_digest(data_bio, digest, md, &data)) == 0)
 456         goto err;
 457     if (!TS_MSG_IMPRINT_set_msg(msg_imprint, data, len))
 458         goto err;
 459     if (!TS_REQ_set_msg_imprint(ts_req, msg_imprint))
 460         goto err;
 461     if (policy && (policy_obj = txt2obj(policy)) == NULL)
 462         goto err;
 463     if (policy_obj && !TS_REQ_set_policy_id(ts_req, policy_obj))
 464         goto err;
 465
 466     /* Setting nonce if requested. */
 467     if (!no_nonce && (nonce_asn1 = create_nonce(NONCE_LENGTH)) == NULL)
 468         goto err;
 469     if (nonce_asn1 && !TS_REQ_set_nonce(ts_req, nonce_asn1))
 470         goto err;
 471     if (!TS_REQ_set_cert_req(ts_req, cert))
 472         goto err;
 473
 474     ret = 1;
 475  err:
 476     if (!ret) {
 477         TS_REQ_free(ts_req);
 478         ts_req = NULL;
 479         BIO_printf(bio_err, "could not create query\n");
 480         ERR_print_errors(bio_err);
 481     }
 482     TS_MSG_IMPRINT_free(msg_imprint);
 483     X509_ALGOR_free(algo);
 484     OPENSSL_free(data);
 485     ASN1_OBJECT_free(policy_obj);
 486     ASN1_INTEGER_free(nonce_asn1);
 487     return ts_req;
 488 }
 489
 490 static int create_digest(BIO *input, const char *digest, const EVP_MD *md,
 491                          unsigned char **md_value)
 492 {
 493     int md_value_len;
 494     int rv = 0;
 495     EVP_MD_CTX *md_ctx = NULL;
 496
 497     md_value_len = EVP_MD_size(md);
 498     if (md_value_len < 0)
 499         return 0;
 500
 501     if (input != NULL) {
 502         unsigned char buffer[4096];
 503         int length;
 504
 505         md_ctx = EVP_MD_CTX_new();
 506         if (md_ctx == NULL)
 507             return 0;
 508         *md_value = app_malloc(md_value_len, "digest buffer");
 509         if (!EVP_DigestInit(md_ctx, md))
 510             goto err;
 511         while ((length = BIO_read(input, buffer, sizeof(buffer))) > 0) {
 512             if (!EVP_DigestUpdate(md_ctx, buffer, length))
 513                 goto err;
 514         }
 515         if (!EVP_DigestFinal(md_ctx, *md_value, NULL))
 516             goto err;
 517         md_value_len = EVP_MD_size(md);
 518     } else {
 519         long digest_len;
 520         *md_value = OPENSSL_hexstr2buf(digest, &digest_len);
 521         if (!*md_value || md_value_len != digest_len) {
 522             OPENSSL_free(*md_value);
 523             *md_value = NULL;
 524             BIO_printf(bio_err, "bad digest, %d bytes "
 525                        "must be specified\n", md_value_len);
 526             return 0;
 527         }
 528     }
 529     rv = md_value_len;
 530  err:
 531     EVP_MD_CTX_free(md_ctx);
 532     return rv;
 533 }
 534
 535 static ASN1_INTEGER *create_nonce(int bits)
 536 {
 537     unsigned char buf[20];
 538     ASN1_INTEGER *nonce = NULL;
 539     int len = (bits - 1) / 8 + 1;
 540     int i;
 541
 542     if (len > (int)sizeof(buf))
 543         goto err;
 544     if (RAND_bytes(buf, len) <= 0)
 545         goto err;
 546
 547     /* Find the first non-zero byte and creating ASN1_INTEGER object. */
 548     for (i = 0; i < len && !buf[i]; ++i)
 549         continue;
 550     if ((nonce = ASN1_INTEGER_new()) == NULL)
 551         goto err;
 552     OPENSSL_free(nonce->data);
 553     nonce->length = len - i;
 554     nonce->data = app_malloc(nonce->length + 1, "nonce buffer");
 555     memcpy(nonce->data, buf + i, nonce->length);
 556     return nonce;
 557
 558  err:
 559     BIO_printf(bio_err, "could not create nonce\n");
 560     ASN1_INTEGER_free(nonce);
 561     return NULL;
 562 }
 563
 564 /*
 565  * Reply-related method definitions.
 566  */
 567
 568 static int reply_command(CONF *conf, const char *section, const char *engine,
 569                          const char *queryfile, const char *passin, const char *inkey,
 570                          const EVP_MD *md, const char *signer, const char *chain,
 571                          const char *policy, const char *in, int token_in,
 572                          const char *out, int token_out, int text)
 573 {
 574     int ret = 0;
 575     TS_RESP *response = NULL;
 576     BIO *in_bio = NULL;
 577     BIO *query_bio = NULL;
 578     BIO *inkey_bio = NULL;
 579     BIO *signer_bio = NULL;
 580     BIO *out_bio = NULL;
 581
 582     if (in != NULL) {
 583         if ((in_bio = BIO_new_file(in, "rb")) == NULL)
 584             goto end;
 585         if (token_in) {
 586             response = read_PKCS7(in_bio);
 587         } else {
 588             response = d2i_TS_RESP_bio(in_bio, NULL);
 589         }
 590     } else {
 591         response = create_response(conf, section, engine, queryfile,
 592                                    passin, inkey, md, signer, chain, policy);
 593         if (response != NULL)
 594             BIO_printf(bio_err, "Response has been generated.\n");
 595         else
 596             BIO_printf(bio_err, "Response is not generated.\n");
 597     }
 598     if (response == NULL)
 599         goto end;
 600
 601     /* Write response. */
 602     if (text) {
 603         if ((out_bio = bio_open_default(out, 'w', FORMAT_TEXT)) == NULL)
 604         goto end;
 605         if (token_out) {
 606             TS_TST_INFO *tst_info = TS_RESP_get_tst_info(response);
 607             if (!TS_TST_INFO_print_bio(out_bio, tst_info))
 608                 goto end;
 609         } else {
 610             if (!TS_RESP_print_bio(out_bio, response))
 611                 goto end;
 612         }
 613     } else {
 614         if ((out_bio = bio_open_default(out, 'w', FORMAT_ASN1)) == NULL)
 615             goto end;
 616         if (token_out) {
 617             PKCS7 *token = TS_RESP_get_token(response);
 618             if (!i2d_PKCS7_bio(out_bio, token))
 619                 goto end;
 620         } else {
 621             if (!i2d_TS_RESP_bio(out_bio, response))
 622                 goto end;
 623         }
 624     }
 625
 626     ret = 1;
 627
 628  end:
 629     ERR_print_errors(bio_err);
 630     BIO_free_all(in_bio);
 631     BIO_free_all(query_bio);
 632     BIO_free_all(inkey_bio);
 633     BIO_free_all(signer_bio);
 634     BIO_free_all(out_bio);
 635     TS_RESP_free(response);
 636     return ret;
 637 }
 638
 639 /* Reads a PKCS7 token and adds default 'granted' status info to it. */
 640 static TS_RESP *read_PKCS7(BIO *in_bio)
 641 {
 642     int ret = 0;
 643     PKCS7 *token = NULL;
 644     TS_TST_INFO *tst_info = NULL;
 645     TS_RESP *resp = NULL;
 646     TS_STATUS_INFO *si = NULL;
 647
 648     if ((token = d2i_PKCS7_bio(in_bio, NULL)) == NULL)
 649         goto end;
 650     if ((tst_info = PKCS7_to_TS_TST_INFO(token)) == NULL)
 651         goto end;
 652     if ((resp = TS_RESP_new()) == NULL)
 653         goto end;
 654     if ((si = TS_STATUS_INFO_new()) == NULL)
 655         goto end;
 656     if (!TS_STATUS_INFO_set_status(si, TS_STATUS_GRANTED))
 657         goto end;
 658     if (!TS_RESP_set_status_info(resp, si))
 659         goto end;
 660     TS_RESP_set_tst_info(resp, token, tst_info);
 661     token = NULL;               /* Ownership is lost. */
 662     tst_info = NULL;            /* Ownership is lost. */
 663     ret = 1;
 664
 665  end:
 666     PKCS7_free(token);
 667     TS_TST_INFO_free(tst_info);
 668     if (!ret) {
 669         TS_RESP_free(resp);
 670         resp = NULL;
 671     }
 672     TS_STATUS_INFO_free(si);
 673     return resp;
 674 }
 675
 676 static TS_RESP *create_response(CONF *conf, const char *section, const char *engine,
 677                                 const char *queryfile, const char *passin,
 678                                 const char *inkey, const EVP_MD *md, const char *signer,
 679                                 const char *chain, const char *policy)
 680 {
 681     int ret = 0;
 682     TS_RESP *response = NULL;
 683     BIO *query_bio = NULL;
 684     TS_RESP_CTX *resp_ctx = NULL;
 685
 686     if ((query_bio = BIO_new_file(queryfile, "rb")) == NULL)
 687         goto end;
 688     if ((section = TS_CONF_get_tsa_section(conf, section)) == NULL)
 689         goto end;
 690     if ((resp_ctx = TS_RESP_CTX_new()) == NULL)
 691         goto end;
 692     if (!TS_CONF_set_serial(conf, section, serial_cb, resp_ctx))
 693         goto end;
 694 # ifndef OPENSSL_NO_ENGINE
 695     if (!TS_CONF_set_crypto_device(conf, section, engine))
 696         goto end;
 697 # endif
 698     if (!TS_CONF_set_signer_cert(conf, section, signer, resp_ctx))
 699         goto end;
 700     if (!TS_CONF_set_certs(conf, section, chain, resp_ctx))
 701         goto end;
 702     if (!TS_CONF_set_signer_key(conf, section, inkey, passin, resp_ctx))
 703         goto end;
 704
 705     if (md) {
 706         if (!TS_RESP_CTX_set_signer_digest(resp_ctx, md))
 707             goto end;
 708     } else if (!TS_CONF_set_signer_digest(conf, section, NULL, resp_ctx)) {
 709             goto end;
 710     }
 711
 712     if (!TS_CONF_set_ess_cert_id_digest(conf, section, resp_ctx))
 713         goto end;
 714     if (!TS_CONF_set_def_policy(conf, section, policy, resp_ctx))
 715         goto end;
 716     if (!TS_CONF_set_policies(conf, section, resp_ctx))
 717         goto end;
 718     if (!TS_CONF_set_digests(conf, section, resp_ctx))
 719         goto end;
 720     if (!TS_CONF_set_accuracy(conf, section, resp_ctx))
 721         goto end;
 722     if (!TS_CONF_set_clock_precision_digits(conf, section, resp_ctx))
 723         goto end;
 724     if (!TS_CONF_set_ordering(conf, section, resp_ctx))
 725         goto end;
 726     if (!TS_CONF_set_tsa_name(conf, section, resp_ctx))
 727         goto end;
 728     if (!TS_CONF_set_ess_cert_id_chain(conf, section, resp_ctx))
 729         goto end;
 730     if ((response = TS_RESP_create_response(resp_ctx, query_bio)) == NULL)
 731         goto end;
 732     ret = 1;
 733
 734  end:
 735     if (!ret) {
 736         TS_RESP_free(response);
 737         response = NULL;
 738     }
 739     TS_RESP_CTX_free(resp_ctx);
 740     BIO_free_all(query_bio);
 741     return response;
 742 }
 743
 744 static ASN1_INTEGER *serial_cb(TS_RESP_CTX *ctx, void *data)
 745 {
 746     const char *serial_file = (const char *)data;
 747     ASN1_INTEGER *serial = next_serial(serial_file);
 748
 749     if (serial == NULL) {
 750         TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
 751                                     "Error during serial number "
 752                                     "generation.");
 753         TS_RESP_CTX_add_failure_info(ctx, TS_INFO_ADD_INFO_NOT_AVAILABLE);
 754     } else {
 755         save_ts_serial(serial_file, serial);
 756     }
 757
 758     return serial;
 759 }
 760
 761 static ASN1_INTEGER *next_serial(const char *serialfile)
 762 {
 763     int ret = 0;
 764     BIO *in = NULL;
 765     ASN1_INTEGER *serial = NULL;
 766     BIGNUM *bn = NULL;
 767
 768     if ((serial = ASN1_INTEGER_new()) == NULL)
 769         goto err;
 770
 771     if ((in = BIO_new_file(serialfile, "r")) == NULL) {
 772         ERR_clear_error();
 773         BIO_printf(bio_err, "Warning: could not open file %s for "
 774                    "reading, using serial number: 1\n", serialfile);
 775         if (!ASN1_INTEGER_set(serial, 1))
 776             goto err;
 777     } else {
 778         char buf[1024];
 779         if (!a2i_ASN1_INTEGER(in, serial, buf, sizeof(buf))) {
 780             BIO_printf(bio_err, "unable to load number from %s\n",
 781                        serialfile);
 782             goto err;
 783         }
 784         if ((bn = ASN1_INTEGER_to_BN(serial, NULL)) == NULL)
 785             goto err;
 786         ASN1_INTEGER_free(serial);
 787         serial = NULL;
 788         if (!BN_add_word(bn, 1))
 789             goto err;
 790         if ((serial = BN_to_ASN1_INTEGER(bn, NULL)) == NULL)
 791             goto err;
 792     }
 793     ret = 1;
 794
 795  err:
 796     if (!ret) {
 797         ASN1_INTEGER_free(serial);
 798         serial = NULL;
 799     }
 800     BIO_free_all(in);
 801     BN_free(bn);
 802     return serial;
 803 }
 804
 805 static int save_ts_serial(const char *serialfile, ASN1_INTEGER *serial)
 806 {
 807     int ret = 0;
 808     BIO *out = NULL;
 809
 810     if ((out = BIO_new_file(serialfile, "w")) == NULL)
 811         goto err;
 812     if (i2a_ASN1_INTEGER(out, serial) <= 0)
 813         goto err;
 814     if (BIO_puts(out, "\n") <= 0)
 815         goto err;
 816     ret = 1;
 817  err:
 818     if (!ret)
 819         BIO_printf(bio_err, "could not save serial number to %s\n",
 820                    serialfile);
 821     BIO_free_all(out);
 822     return ret;
 823 }
 824
 825
 826 /*
 827  * Verify-related method definitions.
 828  */
 829
 830 static int verify_command(const char *data, const char *digest, const char *queryfile,
 831                           const char *in, int token_in,
 832                           const char *CApath, const char *CAfile, const char *untrusted,
 833                           X509_VERIFY_PARAM *vpm)
 834 {
 835     BIO *in_bio = NULL;
 836     PKCS7 *token = NULL;
 837     TS_RESP *response = NULL;
 838     TS_VERIFY_CTX *verify_ctx = NULL;
 839     int ret = 0;
 840
 841     if ((in_bio = BIO_new_file(in, "rb")) == NULL)
 842         goto end;
 843     if (token_in) {
 844         if ((token = d2i_PKCS7_bio(in_bio, NULL)) == NULL)
 845             goto end;
 846     } else {
 847         if ((response = d2i_TS_RESP_bio(in_bio, NULL)) == NULL)
 848             goto end;
 849     }
 850
 851     if ((verify_ctx = create_verify_ctx(data, digest, queryfile,
 852                                         CApath, CAfile, untrusted,
 853                                         vpm)) == NULL)
 854         goto end;
 855
 856     ret = token_in
 857         ? TS_RESP_verify_token(verify_ctx, token)
 858         : TS_RESP_verify_response(verify_ctx, response);
 859
 860  end:
 861     printf("Verification: ");
 862     if (ret)
 863         printf("OK\n");
 864     else {
 865         printf("FAILED\n");
 866         ERR_print_errors(bio_err);
 867     }
 868
 869     BIO_free_all(in_bio);
 870     PKCS7_free(token);
 871     TS_RESP_free(response);
 872     TS_VERIFY_CTX_free(verify_ctx);
 873     return ret;
 874 }
 875
 876 static TS_VERIFY_CTX *create_verify_ctx(const char *data, const char *digest,
 877                                         const char *queryfile,
 878                                         const char *CApath, const char *CAfile,
 879                                         const char *untrusted,
 880                                         X509_VERIFY_PARAM *vpm)
 881 {
 882     TS_VERIFY_CTX *ctx = NULL;
 883     BIO *input = NULL;
 884     TS_REQ *request = NULL;
 885     int ret = 0;
 886     int f = 0;
 887
 888     if (data != NULL || digest != NULL) {
 889         if ((ctx = TS_VERIFY_CTX_new()) == NULL)
 890             goto err;
 891         f = TS_VFY_VERSION | TS_VFY_SIGNER;
 892         if (data != NULL) {
 893             BIO *out = NULL;
 894
 895             f |= TS_VFY_DATA;
 896             if ((out = BIO_new_file(data, "rb")) == NULL)
 897                 goto err;
 898             if (TS_VERIFY_CTX_set_data(ctx, out) == NULL) {
 899                 BIO_free_all(out);
 900                 goto err;
 901             }
 902         } else if (digest != NULL) {
 903             long imprint_len;
 904             unsigned char *hexstr = OPENSSL_hexstr2buf(digest, &imprint_len);
 905             f |= TS_VFY_IMPRINT;
 906             if (TS_VERIFY_CTX_set_imprint(ctx, hexstr, imprint_len) == NULL) {
 907                 BIO_printf(bio_err, "invalid digest string\n");
 908                 goto err;
 909             }
 910         }
 911
 912     } else if (queryfile != NULL) {
 913         if ((input = BIO_new_file(queryfile, "rb")) == NULL)
 914             goto err;
 915         if ((request = d2i_TS_REQ_bio(input, NULL)) == NULL)
 916             goto err;
 917         if ((ctx = TS_REQ_to_TS_VERIFY_CTX(request, NULL)) == NULL)
 918             goto err;
 919     } else {
 920         return NULL;
 921     }
 922
 923     /* Add the signature verification flag and arguments. */
 924     TS_VERIFY_CTX_add_flags(ctx, f | TS_VFY_SIGNATURE);
 925
 926     /* Initialising the X509_STORE object. */
 927     if (TS_VERIFY_CTX_set_store(ctx, create_cert_store(CApath, CAfile, vpm))
 928             == NULL)
 929         goto err;
 930
 931     /* Loading untrusted certificates. */
 932     if (untrusted
 933         && TS_VERIFY_CTS_set_certs(ctx, TS_CONF_load_certs(untrusted)) == NULL)
 934         goto err;
 935     ret = 1;
 936
 937  err:
 938     if (!ret) {
 939         TS_VERIFY_CTX_free(ctx);
 940         ctx = NULL;
 941     }
 942     BIO_free_all(input);
 943     TS_REQ_free(request);
 944     return ctx;
 945 }
 946
 947 static X509_STORE *create_cert_store(const char *CApath, const char *CAfile,
 948                                      X509_VERIFY_PARAM *vpm)
 949 {
 950     X509_STORE *cert_ctx = NULL;
 951     X509_LOOKUP *lookup = NULL;
 952     int i;
 953
 954     cert_ctx = X509_STORE_new();
 955     X509_STORE_set_verify_cb(cert_ctx, verify_cb);
 956     if (CApath != NULL) {
 957         lookup = X509_STORE_add_lookup(cert_ctx, X509_LOOKUP_hash_dir());
 958         if (lookup == NULL) {
 959             BIO_printf(bio_err, "memory allocation failure\n");
 960             goto err;
 961         }
 962         i = X509_LOOKUP_add_dir(lookup, CApath, X509_FILETYPE_PEM);
 963         if (!i) {
 964             BIO_printf(bio_err, "Error loading directory %s\n", CApath);
 965             goto err;
 966         }
 967     }
 968
 969     if (CAfile != NULL) {
 970         lookup = X509_STORE_add_lookup(cert_ctx, X509_LOOKUP_file());
 971         if (lookup == NULL) {
 972             BIO_printf(bio_err, "memory allocation failure\n");
 973             goto err;
 974         }
 975         i = X509_LOOKUP_load_file(lookup, CAfile, X509_FILETYPE_PEM);
 976         if (!i) {
 977             BIO_printf(bio_err, "Error loading file %s\n", CAfile);
 978             goto err;
 979         }
 980     }
 981
 982     if (vpm != NULL)
 983         X509_STORE_set1_param(cert_ctx, vpm);
 984
 985     return cert_ctx;
 986
 987  err:
 988     X509_STORE_free(cert_ctx);
 989     return NULL;
 990 }
 991
 992 static int verify_cb(int ok, X509_STORE_CTX *ctx)
 993 {
 994     return ok;
 995 }
 996 #endif  /* ndef OPENSSL_NO_TS */