apps/ts.c

   1 /*
   2  * Copyright 2006-2018 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (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 "progs.h"
  19 # include <openssl/bio.h>
  20 # include <openssl/err.h>
  21 # include <openssl/pem.h>
  22 # include <openssl/rand.h>
  23 # include <openssl/ts.h>
  24 # include <openssl/bn.h>
  25
  26 /* Request nonce length, in bits (must be a multiple of 8). */
  27 # define NONCE_LENGTH            64
  28
  29 /* Name of config entry that defines the OID file. */
  30 # define ENV_OID_FILE            "oid_file"
  31
  32 /* Is |EXACTLY_ONE| of three pointers set? */
  33 # define EXACTLY_ONE(a, b, c) \
  34         (( a && !b && !c) || \
  35          ( b && !a && !c) || \
  36          ( c && !a && !b))
  37
  38 static ASN1_OBJECT *txt2obj(const char *oid);
  39 static CONF *load_config_file(const char *configfile);
  40
  41 /* Query related functions. */
  42 static int query_command(const char *data, const char *digest,
  43                          const EVP_MD *md, const char *policy, int no_nonce,
  44                          int cert, const char *in, const char *out, int text);
  45 static TS_REQ *create_query(BIO *data_bio, const char *digest, const EVP_MD *md,
  46                             const char *policy, int no_nonce, int cert);
  47 static int create_digest(BIO *input, const char *digest,
  48                          const EVP_MD *md, unsigned char **md_value);
  49 static ASN1_INTEGER *create_nonce(int bits);
  50
  51 /* Reply related functions. */
  52 static int reply_command(CONF *conf, const char *section, const char *engine,
  53                          const char *queryfile, const char *passin, const char *inkey,
  54                          const EVP_MD *md, const char *signer, const char *chain,
  55                          const char *policy, const char *in, int token_in,
  56                          const char *out, int token_out, int text);
  57 static TS_RESP *read_PKCS7(BIO *in_bio);
  58 static TS_RESP *create_response(CONF *conf, const char *section, const char *engine,
  59                                 const char *queryfile, const char *passin,
  60                                 const char *inkey, const EVP_MD *md, const char *signer,
  61                                 const char *chain, const char *policy);
  62 static ASN1_INTEGER *serial_cb(TS_RESP_CTX *ctx, void *data);
  63 static ASN1_INTEGER *next_serial(const char *serialfile);
  64 static int save_ts_serial(const char *serialfile, ASN1_INTEGER *serial);
  65
  66 /* Verify related functions. */
  67 static int verify_command(const char *data, const char *digest, const char *queryfile,
  68                           const char *in, int token_in,
  69                           const char *CApath, const char *CAfile,
  70                           const char *CAstore,
  71                           const char *untrusted, X509_VERIFY_PARAM *vpm);
  72 static TS_VERIFY_CTX *create_verify_ctx(const char *data, const char *digest,
  73                                         const char *queryfile,
  74                                         const char *CApath, const char *CAfile,
  75                                         const char *CAstore,
  76                                         const char *untrusted,
  77                                         X509_VERIFY_PARAM *vpm);
  78 static X509_STORE *create_cert_store(const char *CApath, const char *CAfile,
  79                                      const char *CAstore, X509_VERIFY_PARAM *vpm);
  80 static int verify_cb(int ok, X509_STORE_CTX *ctx);
  81
  82 typedef enum OPTION_choice {
  83     OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
  84     OPT_ENGINE, OPT_CONFIG, OPT_SECTION, OPT_QUERY, OPT_DATA,
  85     OPT_DIGEST, OPT_TSPOLICY, OPT_NO_NONCE, OPT_CERT,
  86     OPT_IN, OPT_TOKEN_IN, OPT_OUT, OPT_TOKEN_OUT, OPT_TEXT,
  87     OPT_REPLY, OPT_QUERYFILE, OPT_PASSIN, OPT_INKEY, OPT_SIGNER,
  88     OPT_CHAIN, OPT_VERIFY, OPT_CAPATH, OPT_CAFILE, OPT_CASTORE, OPT_UNTRUSTED,
  89     OPT_MD, OPT_V_ENUM, OPT_R_ENUM
  90 } OPTION_CHOICE;
  91
  92 const OPTIONS ts_options[] = {
  93     OPT_SECTION("General"),
  94     {"help", OPT_HELP, '-', "Display this summary"},
  95     {"config", OPT_CONFIG, '<', "Configuration file"},
  96     {"section", OPT_SECTION, 's', "Section to use within config file"},
  97 # ifndef OPENSSL_NO_ENGINE
  98     {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
  99 # endif
 100     {"inkey", OPT_INKEY, 's', "File with private key for reply"},
 101     {"signer", OPT_SIGNER, 's', "Signer certificate file"},
 102     {"chain", OPT_CHAIN, '<', "File with signer CA chain"},
 103     {"CApath", OPT_CAPATH, '/', "Path to trusted CA files"},
 104     {"CAfile", OPT_CAFILE, '<', "File with trusted CA certs"},
 105     {"CAstore", OPT_CASTORE, ':', "URI to trusted CA store"},
 106     {"untrusted", OPT_UNTRUSTED, '<', "File with untrusted certs"},
 107     {"token_in", OPT_TOKEN_IN, '-', "Input is a PKCS#7 file"},
 108     {"token_out", OPT_TOKEN_OUT, '-', "Output is a PKCS#7 file"},
 109     {"passin", OPT_PASSIN, 's', "Input file pass phrase source"},
 110     {"", OPT_MD, '-', "Any supported digest"},
 111
 112     OPT_SECTION("Query"),
 113     {"query", OPT_QUERY, '-', "Generate a TS query"},
 114     {"data", OPT_DATA, '<', "File to hash"},
 115     {"digest", OPT_DIGEST, 's', "Digest (as a hex string)"},
 116     {"queryfile", OPT_QUERYFILE, '<', "File containing a TS query"},
 117     {"cert", OPT_CERT, '-', "Put cert request into query"},
 118     {"in", OPT_IN, '<', "Input file"},
 119
 120     OPT_SECTION("Verify"),
 121     {"verify", OPT_VERIFY, '-', "Verify a TS response"},
 122     {"reply", OPT_REPLY, '-', "Generate a TS reply"},
 123     {"tspolicy", OPT_TSPOLICY, 's', "Policy OID to use"},
 124     {"no_nonce", OPT_NO_NONCE, '-', "Do not include a nonce"},
 125     {"out", OPT_OUT, '>', "Output file"},
 126     {"text", OPT_TEXT, '-', "Output text (not DER)"},
 127
 128     OPT_R_OPTIONS,
 129     OPT_V_OPTIONS,
 130     {NULL}
 131 };
 132
 133 /*
 134  * This command is so complex, special help is needed.
 135  */
 136 static char* opt_helplist[] = {
 137     "",
 138     "Typical uses:",
 139     " openssl ts -query [-rand file...] [-config file] [-data file]",
 140     "    [-digest hexstring] [-tspolicy oid] [-no_nonce] [-cert]",
 141     "    [-in file] [-out file] [-text]",
 142     "",
 143     " openssl ts -reply [-config file] [-section tsa_section]",
 144     "    [-queryfile file] [-passin password]",
 145     "    [-signer tsa_cert.pem] [-inkey private_key.pem]",
 146     "    [-chain certs_file.pem] [-tspolicy oid]",
 147     "    [-in file] [-token_in] [-out file] [-token_out]",
 148 # ifndef OPENSSL_NO_ENGINE
 149     "    [-text] [-engine id]",
 150 # else
 151     "    [-text]",
 152 # endif
 153     "",
 154     " openssl ts -verify -CApath dir -CAfile file.pem -CAstore uri",
 155     "   -untrusted file.pem [-data file] [-digest hexstring]",
 156     "    [-queryfile file] -in file [-token_in] ...",
 157     NULL,
 158 };
 159
 160 int ts_main(int argc, char **argv)
 161 {
 162     CONF *conf = NULL;
 163     const char *CAfile = NULL, *untrusted = NULL, *prog;
 164     const char *configfile = default_config_file, *engine = NULL;
 165     const char *section = NULL;
 166     char **helpp;
 167     char *password = NULL;
 168     char *data = NULL, *digest = NULL, *policy = NULL;
 169     char *in = NULL, *out = NULL, *queryfile = NULL, *passin = NULL;
 170     char *inkey = NULL, *signer = NULL, *chain = NULL, *CApath = NULL;
 171     char *CAstore = NULL;
 172     const EVP_MD *md = NULL;
 173     OPTION_CHOICE o, mode = OPT_ERR;
 174     int ret = 1, no_nonce = 0, cert = 0, text = 0;
 175     int vpmtouched = 0;
 176     X509_VERIFY_PARAM *vpm = NULL;
 177     /* Input is ContentInfo instead of TimeStampResp. */
 178     int token_in = 0;
 179     /* Output is ContentInfo instead of TimeStampResp. */
 180     int token_out = 0;
 181
 182     if ((vpm = X509_VERIFY_PARAM_new()) == NULL)
 183         goto end;
 184
 185     prog = opt_init(argc, argv, ts_options);
 186     while ((o = opt_next()) != OPT_EOF) {
 187         switch (o) {
 188         case OPT_EOF:
 189         case OPT_ERR:
 190  opthelp:
 191             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
 192             goto end;
 193         case OPT_HELP:
 194             opt_help(ts_options);
 195             for (helpp = opt_helplist; *helpp; ++helpp)
 196                 BIO_printf(bio_err, "%s\n", *helpp);
 197             ret = 0;
 198             goto end;
 199         case OPT_CONFIG:
 200             configfile = opt_arg();
 201             break;
 202         case OPT_SECTION:
 203             section = opt_arg();
 204             break;
 205         case OPT_QUERY:
 206         case OPT_REPLY:
 207         case OPT_VERIFY:
 208             if (mode != OPT_ERR)
 209                 goto opthelp;
 210             mode = o;
 211             break;
 212         case OPT_DATA:
 213             data = opt_arg();
 214             break;
 215         case OPT_DIGEST:
 216             digest = opt_arg();
 217             break;
 218         case OPT_R_CASES:
 219             if (!opt_rand(o))
 220                 goto end;
 221             break;
 222         case OPT_TSPOLICY:
 223             policy = opt_arg();
 224             break;
 225         case OPT_NO_NONCE:
 226             no_nonce = 1;
 227             break;
 228         case OPT_CERT:
 229             cert = 1;
 230             break;
 231         case OPT_IN:
 232             in = opt_arg();
 233             break;
 234         case OPT_TOKEN_IN:
 235             token_in = 1;
 236             break;
 237         case OPT_OUT:
 238             out = opt_arg();
 239             break;
 240         case OPT_TOKEN_OUT:
 241             token_out = 1;
 242             break;
 243         case OPT_TEXT:
 244             text = 1;
 245             break;
 246         case OPT_QUERYFILE:
 247             queryfile = opt_arg();
 248             break;
 249         case OPT_PASSIN:
 250             passin = opt_arg();
 251             break;
 252         case OPT_INKEY:
 253             inkey = opt_arg();
 254             break;
 255         case OPT_SIGNER:
 256             signer = opt_arg();
 257             break;
 258         case OPT_CHAIN:
 259             chain = opt_arg();
 260             break;
 261         case OPT_CAPATH:
 262             CApath = opt_arg();
 263             break;
 264         case OPT_CAFILE:
 265             CAfile = opt_arg();
 266             break;
 267         case OPT_CASTORE:
 268             CAstore = opt_arg();
 269             break;
 270         case OPT_UNTRUSTED:
 271             untrusted = opt_arg();
 272             break;
 273         case OPT_ENGINE:
 274             engine = opt_arg();
 275             break;
 276         case OPT_MD:
 277             if (!opt_md(opt_unknown(), &md))
 278                 goto opthelp;
 279             break;
 280         case OPT_V_CASES:
 281             if (!opt_verify(o, vpm))
 282                 goto end;
 283             vpmtouched++;
 284             break;
 285         }
 286     }
 287     if (mode == OPT_ERR || opt_num_rest() != 0)
 288         goto opthelp;
 289
 290     if (mode == OPT_REPLY && passin &&
 291         !app_passwd(passin, NULL, &password, NULL)) {
 292         BIO_printf(bio_err, "Error getting password.\n");
 293         goto end;
 294     }
 295
 296     if ((conf = load_config_file(configfile)) == NULL)
 297         goto end;
 298     if (configfile != default_config_file && !app_load_modules(conf))
 299         goto end;
 300
 301     /* Check parameter consistency and execute the appropriate function. */
 302     if (mode == OPT_QUERY) {
 303         if (vpmtouched)
 304             goto opthelp;
 305         if ((data != NULL) && (digest != NULL))
 306             goto opthelp;
 307         ret = !query_command(data, digest, md, policy, no_nonce, cert,
 308                              in, out, text);
 309     } else if (mode == OPT_REPLY) {
 310         if (vpmtouched)
 311             goto opthelp;
 312         if ((in != NULL) && (queryfile != NULL))
 313             goto opthelp;
 314         if (in == NULL) {
 315             if ((conf == NULL) || (token_in != 0))
 316                 goto opthelp;
 317         }
 318         ret = !reply_command(conf, section, engine, queryfile,
 319                              password, inkey, md, signer, chain, policy,
 320                              in, token_in, out, token_out, text);
 321
 322     } else if (mode == OPT_VERIFY) {
 323         if ((in == NULL) || !EXACTLY_ONE(queryfile, data, digest))
 324             goto opthelp;
 325         ret = !verify_command(data, digest, queryfile, in, token_in,
 326                               CApath, CAfile, CAstore, untrusted,
 327                               vpmtouched ? vpm : NULL);
 328     } else {
 329         goto opthelp;
 330     }
 331
 332  end:
 333     X509_VERIFY_PARAM_free(vpm);
 334     NCONF_free(conf);
 335     OPENSSL_free(password);
 336     return ret;
 337 }
 338
 339 /*
 340  * Configuration file-related function definitions.
 341  */
 342
 343 static ASN1_OBJECT *txt2obj(const char *oid)
 344 {
 345     ASN1_OBJECT *oid_obj = NULL;
 346
 347     if ((oid_obj = OBJ_txt2obj(oid, 0)) == NULL)
 348         BIO_printf(bio_err, "cannot convert %s to OID\n", oid);
 349
 350     return oid_obj;
 351 }
 352
 353 static CONF *load_config_file(const char *configfile)
 354 {
 355     CONF *conf = app_load_config(configfile);
 356
 357     if (conf != NULL) {
 358         const char *p;
 359
 360         BIO_printf(bio_err, "Using configuration from %s\n", configfile);
 361         p = NCONF_get_string(conf, NULL, ENV_OID_FILE);
 362         if (p != NULL) {
 363             BIO *oid_bio = BIO_new_file(p, "r");
 364             if (!oid_bio)
 365                 ERR_print_errors(bio_err);
 366             else {
 367                 OBJ_create_objects(oid_bio);
 368                 BIO_free_all(oid_bio);
 369             }
 370         } else
 371             ERR_clear_error();
 372         if (!add_oid_section(conf))
 373             ERR_print_errors(bio_err);
 374     }
 375     return conf;
 376 }
 377
 378 /*
 379  * Query-related method definitions.
 380  */
 381 static int query_command(const char *data, const char *digest, const EVP_MD *md,
 382                          const char *policy, int no_nonce,
 383                          int cert, const char *in, const char *out, int text)
 384 {
 385     int ret = 0;
 386     TS_REQ *query = NULL;
 387     BIO *in_bio = NULL;
 388     BIO *data_bio = NULL;
 389     BIO *out_bio = NULL;
 390
 391     /* Build query object. */
 392     if (in != NULL) {
 393         if ((in_bio = bio_open_default(in, 'r', FORMAT_ASN1)) == NULL)
 394             goto end;
 395         query = d2i_TS_REQ_bio(in_bio, NULL);
 396     } else {
 397         if (digest == NULL
 398             && (data_bio = bio_open_default(data, 'r', FORMAT_ASN1)) == NULL)
 399             goto end;
 400         query = create_query(data_bio, digest, md, policy, no_nonce, cert);
 401     }
 402     if (query == NULL)
 403         goto end;
 404
 405     if (text) {
 406         if ((out_bio = bio_open_default(out, 'w', FORMAT_TEXT)) == NULL)
 407             goto end;
 408         if (!TS_REQ_print_bio(out_bio, query))
 409             goto end;
 410     } else {
 411         if ((out_bio = bio_open_default(out, 'w', FORMAT_ASN1)) == NULL)
 412             goto end;
 413         if (!i2d_TS_REQ_bio(out_bio, query))
 414             goto end;
 415     }
 416
 417     ret = 1;
 418
 419  end:
 420     ERR_print_errors(bio_err);
 421     BIO_free_all(in_bio);
 422     BIO_free_all(data_bio);
 423     BIO_free_all(out_bio);
 424     TS_REQ_free(query);
 425     return ret;
 426 }
 427
 428 static TS_REQ *create_query(BIO *data_bio, const char *digest, const EVP_MD *md,
 429                             const char *policy, int no_nonce, int cert)
 430 {
 431     int ret = 0;
 432     TS_REQ *ts_req = NULL;
 433     int len;
 434     TS_MSG_IMPRINT *msg_imprint = NULL;
 435     X509_ALGOR *algo = NULL;
 436     unsigned char *data = NULL;
 437     ASN1_OBJECT *policy_obj = NULL;
 438     ASN1_INTEGER *nonce_asn1 = NULL;
 439
 440     if (md == NULL && (md = EVP_get_digestbyname("sha256")) == NULL)
 441         goto err;
 442     if ((ts_req = TS_REQ_new()) == NULL)
 443         goto err;
 444     if (!TS_REQ_set_version(ts_req, 1))
 445         goto err;
 446     if ((msg_imprint = TS_MSG_IMPRINT_new()) == NULL)
 447         goto err;
 448     if ((algo = X509_ALGOR_new()) == NULL)
 449         goto err;
 450     if ((algo->algorithm = OBJ_nid2obj(EVP_MD_type(md))) == NULL)
 451         goto err;
 452     if ((algo->parameter = ASN1_TYPE_new()) == NULL)
 453         goto err;
 454     algo->parameter->type = V_ASN1_NULL;
 455     if (!TS_MSG_IMPRINT_set_algo(msg_imprint, algo))
 456         goto err;
 457     if ((len = create_digest(data_bio, digest, md, &data)) == 0)
 458         goto err;
 459     if (!TS_MSG_IMPRINT_set_msg(msg_imprint, data, len))
 460         goto err;
 461     if (!TS_REQ_set_msg_imprint(ts_req, msg_imprint))
 462         goto err;
 463     if (policy && (policy_obj = txt2obj(policy)) == NULL)
 464         goto err;
 465     if (policy_obj && !TS_REQ_set_policy_id(ts_req, policy_obj))
 466         goto err;
 467
 468     /* Setting nonce if requested. */
 469     if (!no_nonce && (nonce_asn1 = create_nonce(NONCE_LENGTH)) == NULL)
 470         goto err;
 471     if (nonce_asn1 && !TS_REQ_set_nonce(ts_req, nonce_asn1))
 472         goto err;
 473     if (!TS_REQ_set_cert_req(ts_req, cert))
 474         goto err;
 475
 476     ret = 1;
 477  err:
 478     if (!ret) {
 479         TS_REQ_free(ts_req);
 480         ts_req = NULL;
 481         BIO_printf(bio_err, "could not create query\n");
 482         ERR_print_errors(bio_err);
 483     }
 484     TS_MSG_IMPRINT_free(msg_imprint);
 485     X509_ALGOR_free(algo);
 486     OPENSSL_free(data);
 487     ASN1_OBJECT_free(policy_obj);
 488     ASN1_INTEGER_free(nonce_asn1);
 489     return ts_req;
 490 }
 491
 492 static int create_digest(BIO *input, const char *digest, const EVP_MD *md,
 493                          unsigned char **md_value)
 494 {
 495     int md_value_len;
 496     int rv = 0;
 497     EVP_MD_CTX *md_ctx = NULL;
 498
 499     md_value_len = EVP_MD_size(md);
 500     if (md_value_len < 0)
 501         return 0;
 502
 503     if (input != NULL) {
 504         unsigned char buffer[4096];
 505         int length;
 506
 507         md_ctx = EVP_MD_CTX_new();
 508         if (md_ctx == NULL)
 509             return 0;
 510         *md_value = app_malloc(md_value_len, "digest buffer");
 511         if (!EVP_DigestInit(md_ctx, md))
 512             goto err;
 513         while ((length = BIO_read(input, buffer, sizeof(buffer))) > 0) {
 514             if (!EVP_DigestUpdate(md_ctx, buffer, length))
 515                 goto err;
 516         }
 517         if (!EVP_DigestFinal(md_ctx, *md_value, NULL))
 518             goto err;
 519         md_value_len = EVP_MD_size(md);
 520     } else {
 521         long digest_len;
 522
 523         *md_value = OPENSSL_hexstr2buf(digest, &digest_len);
 524         if (*md_value == NULL || md_value_len != digest_len) {
 525             OPENSSL_free(*md_value);
 526             *md_value = NULL;
 527             BIO_printf(bio_err, "bad digest, %d bytes "
 528                        "must be specified\n", md_value_len);
 529             return 0;
 530         }
 531     }
 532     rv = md_value_len;
 533  err:
 534     EVP_MD_CTX_free(md_ctx);
 535     return rv;
 536 }
 537
 538 static ASN1_INTEGER *create_nonce(int bits)
 539 {
 540     unsigned char buf[20];
 541     ASN1_INTEGER *nonce = NULL;
 542     int len = (bits - 1) / 8 + 1;
 543     int i;
 544
 545     if (len > (int)sizeof(buf))
 546         goto err;
 547     if (RAND_bytes(buf, len) <= 0)
 548         goto err;
 549
 550     /* Find the first non-zero byte and creating ASN1_INTEGER object. */
 551     for (i = 0; i < len && !buf[i]; ++i)
 552         continue;
 553     if ((nonce = ASN1_INTEGER_new()) == NULL)
 554         goto err;
 555     OPENSSL_free(nonce->data);
 556     nonce->length = len - i;
 557     nonce->data = app_malloc(nonce->length + 1, "nonce buffer");
 558     memcpy(nonce->data, buf + i, nonce->length);
 559     return nonce;
 560
 561  err:
 562     BIO_printf(bio_err, "could not create nonce\n");
 563     ASN1_INTEGER_free(nonce);
 564     return NULL;
 565 }
 566
 567 /*
 568  * Reply-related method definitions.
 569  */
 570
 571 static int reply_command(CONF *conf, const char *section, const char *engine,
 572                          const char *queryfile, const char *passin, const char *inkey,
 573                          const EVP_MD *md, const char *signer, const char *chain,
 574                          const char *policy, const char *in, int token_in,
 575                          const char *out, int token_out, int text)
 576 {
 577     int ret = 0;
 578     TS_RESP *response = NULL;
 579     BIO *in_bio = NULL;
 580     BIO *query_bio = NULL;
 581     BIO *inkey_bio = NULL;
 582     BIO *signer_bio = NULL;
 583     BIO *out_bio = NULL;
 584
 585     if (in != NULL) {
 586         if ((in_bio = BIO_new_file(in, "rb")) == NULL)
 587             goto end;
 588         if (token_in) {
 589             response = read_PKCS7(in_bio);
 590         } else {
 591             response = d2i_TS_RESP_bio(in_bio, NULL);
 592         }
 593     } else {
 594         response = create_response(conf, section, engine, queryfile,
 595                                    passin, inkey, md, signer, chain, policy);
 596         if (response != NULL)
 597             BIO_printf(bio_err, "Response has been generated.\n");
 598         else
 599             BIO_printf(bio_err, "Response is not generated.\n");
 600     }
 601     if (response == NULL)
 602         goto end;
 603
 604     /* Write response. */
 605     if (text) {
 606         if ((out_bio = bio_open_default(out, 'w', FORMAT_TEXT)) == NULL)
 607         goto end;
 608         if (token_out) {
 609             TS_TST_INFO *tst_info = TS_RESP_get_tst_info(response);
 610             if (!TS_TST_INFO_print_bio(out_bio, tst_info))
 611                 goto end;
 612         } else {
 613             if (!TS_RESP_print_bio(out_bio, response))
 614                 goto end;
 615         }
 616     } else {
 617         if ((out_bio = bio_open_default(out, 'w', FORMAT_ASN1)) == NULL)
 618             goto end;
 619         if (token_out) {
 620             PKCS7 *token = TS_RESP_get_token(response);
 621             if (!i2d_PKCS7_bio(out_bio, token))
 622                 goto end;
 623         } else {
 624             if (!i2d_TS_RESP_bio(out_bio, response))
 625                 goto end;
 626         }
 627     }
 628
 629     ret = 1;
 630
 631  end:
 632     ERR_print_errors(bio_err);
 633     BIO_free_all(in_bio);
 634     BIO_free_all(query_bio);
 635     BIO_free_all(inkey_bio);
 636     BIO_free_all(signer_bio);
 637     BIO_free_all(out_bio);
 638     TS_RESP_free(response);
 639     return ret;
 640 }
 641
 642 /* Reads a PKCS7 token and adds default 'granted' status info to it. */
 643 static TS_RESP *read_PKCS7(BIO *in_bio)
 644 {
 645     int ret = 0;
 646     PKCS7 *token = NULL;
 647     TS_TST_INFO *tst_info = NULL;
 648     TS_RESP *resp = NULL;
 649     TS_STATUS_INFO *si = NULL;
 650
 651     if ((token = d2i_PKCS7_bio(in_bio, NULL)) == NULL)
 652         goto end;
 653     if ((tst_info = PKCS7_to_TS_TST_INFO(token)) == NULL)
 654         goto end;
 655     if ((resp = TS_RESP_new()) == NULL)
 656         goto end;
 657     if ((si = TS_STATUS_INFO_new()) == NULL)
 658         goto end;
 659     if (!TS_STATUS_INFO_set_status(si, TS_STATUS_GRANTED))
 660         goto end;
 661     if (!TS_RESP_set_status_info(resp, si))
 662         goto end;
 663     TS_RESP_set_tst_info(resp, token, tst_info);
 664     token = NULL;               /* Ownership is lost. */
 665     tst_info = NULL;            /* Ownership is lost. */
 666     ret = 1;
 667
 668  end:
 669     PKCS7_free(token);
 670     TS_TST_INFO_free(tst_info);
 671     if (!ret) {
 672         TS_RESP_free(resp);
 673         resp = NULL;
 674     }
 675     TS_STATUS_INFO_free(si);
 676     return resp;
 677 }
 678
 679 static TS_RESP *create_response(CONF *conf, const char *section, const char *engine,
 680                                 const char *queryfile, const char *passin,
 681                                 const char *inkey, const EVP_MD *md, const char *signer,
 682                                 const char *chain, const char *policy)
 683 {
 684     int ret = 0;
 685     TS_RESP *response = NULL;
 686     BIO *query_bio = NULL;
 687     TS_RESP_CTX *resp_ctx = NULL;
 688
 689     if ((query_bio = BIO_new_file(queryfile, "rb")) == NULL)
 690         goto end;
 691     if ((section = TS_CONF_get_tsa_section(conf, section)) == NULL)
 692         goto end;
 693     if ((resp_ctx = TS_RESP_CTX_new()) == NULL)
 694         goto end;
 695     if (!TS_CONF_set_serial(conf, section, serial_cb, resp_ctx))
 696         goto end;
 697 # ifndef OPENSSL_NO_ENGINE
 698     if (!TS_CONF_set_crypto_device(conf, section, engine))
 699         goto end;
 700 # endif
 701     if (!TS_CONF_set_signer_cert(conf, section, signer, resp_ctx))
 702         goto end;
 703     if (!TS_CONF_set_certs(conf, section, chain, resp_ctx))
 704         goto end;
 705     if (!TS_CONF_set_signer_key(conf, section, inkey, passin, resp_ctx))
 706         goto end;
 707
 708     if (md) {
 709         if (!TS_RESP_CTX_set_signer_digest(resp_ctx, md))
 710             goto end;
 711     } else if (!TS_CONF_set_signer_digest(conf, section, NULL, resp_ctx)) {
 712             goto end;
 713     }
 714
 715     if (!TS_CONF_set_ess_cert_id_digest(conf, section, resp_ctx))
 716         goto end;
 717     if (!TS_CONF_set_def_policy(conf, section, policy, resp_ctx))
 718         goto end;
 719     if (!TS_CONF_set_policies(conf, section, resp_ctx))
 720         goto end;
 721     if (!TS_CONF_set_digests(conf, section, resp_ctx))
 722         goto end;
 723     if (!TS_CONF_set_accuracy(conf, section, resp_ctx))
 724         goto end;
 725     if (!TS_CONF_set_clock_precision_digits(conf, section, resp_ctx))
 726         goto end;
 727     if (!TS_CONF_set_ordering(conf, section, resp_ctx))
 728         goto end;
 729     if (!TS_CONF_set_tsa_name(conf, section, resp_ctx))
 730         goto end;
 731     if (!TS_CONF_set_ess_cert_id_chain(conf, section, resp_ctx))
 732         goto end;
 733     if ((response = TS_RESP_create_response(resp_ctx, query_bio)) == NULL)
 734         goto end;
 735     ret = 1;
 736
 737  end:
 738     if (!ret) {
 739         TS_RESP_free(response);
 740         response = NULL;
 741     }
 742     TS_RESP_CTX_free(resp_ctx);
 743     BIO_free_all(query_bio);
 744     return response;
 745 }
 746
 747 static ASN1_INTEGER *serial_cb(TS_RESP_CTX *ctx, void *data)
 748 {
 749     const char *serial_file = (const char *)data;
 750     ASN1_INTEGER *serial = next_serial(serial_file);
 751
 752     if (serial == NULL) {
 753         TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
 754                                     "Error during serial number "
 755                                     "generation.");
 756         TS_RESP_CTX_add_failure_info(ctx, TS_INFO_ADD_INFO_NOT_AVAILABLE);
 757     } else {
 758         save_ts_serial(serial_file, serial);
 759     }
 760
 761     return serial;
 762 }
 763
 764 static ASN1_INTEGER *next_serial(const char *serialfile)
 765 {
 766     int ret = 0;
 767     BIO *in = NULL;
 768     ASN1_INTEGER *serial = NULL;
 769     BIGNUM *bn = NULL;
 770
 771     if ((serial = ASN1_INTEGER_new()) == NULL)
 772         goto err;
 773
 774     if ((in = BIO_new_file(serialfile, "r")) == NULL) {
 775         ERR_clear_error();
 776         BIO_printf(bio_err, "Warning: could not open file %s for "
 777                    "reading, using serial number: 1\n", serialfile);
 778         if (!ASN1_INTEGER_set(serial, 1))
 779             goto err;
 780     } else {
 781         char buf[1024];
 782         if (!a2i_ASN1_INTEGER(in, serial, buf, sizeof(buf))) {
 783             BIO_printf(bio_err, "unable to load number from %s\n",
 784                        serialfile);
 785             goto err;
 786         }
 787         if ((bn = ASN1_INTEGER_to_BN(serial, NULL)) == NULL)
 788             goto err;
 789         ASN1_INTEGER_free(serial);
 790         serial = NULL;
 791         if (!BN_add_word(bn, 1))
 792             goto err;
 793         if ((serial = BN_to_ASN1_INTEGER(bn, NULL)) == NULL)
 794             goto err;
 795     }
 796     ret = 1;
 797
 798  err:
 799     if (!ret) {
 800         ASN1_INTEGER_free(serial);
 801         serial = NULL;
 802     }
 803     BIO_free_all(in);
 804     BN_free(bn);
 805     return serial;
 806 }
 807
 808 static int save_ts_serial(const char *serialfile, ASN1_INTEGER *serial)
 809 {
 810     int ret = 0;
 811     BIO *out = NULL;
 812
 813     if ((out = BIO_new_file(serialfile, "w")) == NULL)
 814         goto err;
 815     if (i2a_ASN1_INTEGER(out, serial) <= 0)
 816         goto err;
 817     if (BIO_puts(out, "\n") <= 0)
 818         goto err;
 819     ret = 1;
 820  err:
 821     if (!ret)
 822         BIO_printf(bio_err, "could not save serial number to %s\n",
 823                    serialfile);
 824     BIO_free_all(out);
 825     return ret;
 826 }
 827
 828
 829 /*
 830  * Verify-related method definitions.
 831  */
 832
 833 static int verify_command(const char *data, const char *digest, const char *queryfile,
 834                           const char *in, int token_in,
 835                           const char *CApath, const char *CAfile,
 836                           const char *CAstore, const char *untrusted,
 837                           X509_VERIFY_PARAM *vpm)
 838 {
 839     BIO *in_bio = NULL;
 840     PKCS7 *token = NULL;
 841     TS_RESP *response = NULL;
 842     TS_VERIFY_CTX *verify_ctx = NULL;
 843     int ret = 0;
 844
 845     if ((in_bio = BIO_new_file(in, "rb")) == NULL)
 846         goto end;
 847     if (token_in) {
 848         if ((token = d2i_PKCS7_bio(in_bio, NULL)) == NULL)
 849             goto end;
 850     } else {
 851         if ((response = d2i_TS_RESP_bio(in_bio, NULL)) == NULL)
 852             goto end;
 853     }
 854
 855     if ((verify_ctx = create_verify_ctx(data, digest, queryfile,
 856                                         CApath, CAfile, CAstore, untrusted,
 857                                         vpm)) == NULL)
 858         goto end;
 859
 860     ret = token_in
 861         ? TS_RESP_verify_token(verify_ctx, token)
 862         : TS_RESP_verify_response(verify_ctx, response);
 863
 864  end:
 865     printf("Verification: ");
 866     if (ret)
 867         printf("OK\n");
 868     else {
 869         printf("FAILED\n");
 870         ERR_print_errors(bio_err);
 871     }
 872
 873     BIO_free_all(in_bio);
 874     PKCS7_free(token);
 875     TS_RESP_free(response);
 876     TS_VERIFY_CTX_free(verify_ctx);
 877     return ret;
 878 }
 879
 880 static TS_VERIFY_CTX *create_verify_ctx(const char *data, const char *digest,
 881                                         const char *queryfile,
 882                                         const char *CApath, const char *CAfile,
 883                                         const char *CAstore,
 884                                         const char *untrusted,
 885                                         X509_VERIFY_PARAM *vpm)
 886 {
 887     TS_VERIFY_CTX *ctx = NULL;
 888     BIO *input = NULL;
 889     TS_REQ *request = NULL;
 890     int ret = 0;
 891     int f = 0;
 892
 893     if (data != NULL || digest != NULL) {
 894         if ((ctx = TS_VERIFY_CTX_new()) == NULL)
 895             goto err;
 896         f = TS_VFY_VERSION | TS_VFY_SIGNER;
 897         if (data != NULL) {
 898             BIO *out = NULL;
 899
 900             f |= TS_VFY_DATA;
 901             if ((out = BIO_new_file(data, "rb")) == NULL)
 902                 goto err;
 903             if (TS_VERIFY_CTX_set_data(ctx, out) == NULL) {
 904                 BIO_free_all(out);
 905                 goto err;
 906             }
 907         } else if (digest != NULL) {
 908             long imprint_len;
 909             unsigned char *hexstr = OPENSSL_hexstr2buf(digest, &imprint_len);
 910             f |= TS_VFY_IMPRINT;
 911             if (TS_VERIFY_CTX_set_imprint(ctx, hexstr, imprint_len) == NULL) {
 912                 BIO_printf(bio_err, "invalid digest string\n");
 913                 goto err;
 914             }
 915         }
 916
 917     } else if (queryfile != NULL) {
 918         if ((input = BIO_new_file(queryfile, "rb")) == NULL)
 919             goto err;
 920         if ((request = d2i_TS_REQ_bio(input, NULL)) == NULL)
 921             goto err;
 922         if ((ctx = TS_REQ_to_TS_VERIFY_CTX(request, NULL)) == NULL)
 923             goto err;
 924     } else {
 925         return NULL;
 926     }
 927
 928     /* Add the signature verification flag and arguments. */
 929     TS_VERIFY_CTX_add_flags(ctx, f | TS_VFY_SIGNATURE);
 930
 931     /* Initialising the X509_STORE object. */
 932     if (TS_VERIFY_CTX_set_store(ctx,
 933                                 create_cert_store(CApath, CAfile, CAstore, vpm))
 934             == NULL)
 935         goto err;
 936
 937     /* Loading untrusted certificates. */
 938     if (untrusted
 939         && TS_VERIFY_CTX_set_certs(ctx, TS_CONF_load_certs(untrusted)) == NULL)
 940         goto err;
 941     ret = 1;
 942
 943  err:
 944     if (!ret) {
 945         TS_VERIFY_CTX_free(ctx);
 946         ctx = NULL;
 947     }
 948     BIO_free_all(input);
 949     TS_REQ_free(request);
 950     return ctx;
 951 }
 952
 953 static X509_STORE *create_cert_store(const char *CApath, const char *CAfile,
 954                                      const char *CAstore, X509_VERIFY_PARAM *vpm)
 955 {
 956     X509_STORE *cert_ctx = NULL;
 957     X509_LOOKUP *lookup = NULL;
 958
 959     cert_ctx = X509_STORE_new();
 960     X509_STORE_set_verify_cb(cert_ctx, verify_cb);
 961     if (CApath != NULL) {
 962         lookup = X509_STORE_add_lookup(cert_ctx, X509_LOOKUP_hash_dir());
 963         if (lookup == NULL) {
 964             BIO_printf(bio_err, "memory allocation failure\n");
 965             goto err;
 966         }
 967         if (!X509_LOOKUP_add_dir(lookup, CApath, X509_FILETYPE_PEM)) {
 968             BIO_printf(bio_err, "Error loading directory %s\n", CApath);
 969             goto err;
 970         }
 971     }
 972
 973     if (CAfile != NULL) {
 974         lookup = X509_STORE_add_lookup(cert_ctx, X509_LOOKUP_file());
 975         if (lookup == NULL) {
 976             BIO_printf(bio_err, "memory allocation failure\n");
 977             goto err;
 978         }
 979         if (!X509_LOOKUP_load_file(lookup, CAfile, X509_FILETYPE_PEM)) {
 980             BIO_printf(bio_err, "Error loading file %s\n", CAfile);
 981             goto err;
 982         }
 983     }
 984
 985     if (CAstore != NULL) {
 986         lookup = X509_STORE_add_lookup(cert_ctx, X509_LOOKUP_store());
 987         if (lookup == NULL) {
 988             BIO_printf(bio_err, "memory allocation failure\n");
 989             goto err;
 990         }
 991         if (!X509_LOOKUP_load_store(lookup, CAstore)) {
 992             BIO_printf(bio_err, "Error loading store URI %s\n", CAstore);
 993             goto err;
 994         }
 995     }
 996
 997     if (vpm != NULL)
 998         X509_STORE_set1_param(cert_ctx, vpm);
 999
1000     return cert_ctx;
1001
1002  err:
1003     X509_STORE_free(cert_ctx);
1004     return NULL;
1005 }
1006
1007 static int verify_cb(int ok, X509_STORE_CTX *ctx)
1008 {
1009     return ok;
1010 }
1011 #endif  /* ndef OPENSSL_NO_TS */