apps/ts.c

   1 /*
   2  * Copyright 2006-2016 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, 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, char *digest, const EVP_MD *md,
  45                             const char *policy, int no_nonce, int cert);
  46 static int create_digest(BIO *input, 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, char *section, char *engine,
  52                          char *queryfile, char *passin, char *inkey,
  53                          const EVP_MD *md, char *signer, char *chain,
  54                          const char *policy, char *in, int token_in,
  55                          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, char *engine,
  58                                 char *queryfile, char *passin,
  59                                 char *inkey, const EVP_MD *md, char *signer,
  60                                 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(char *data, char *digest, char *queryfile,
  67                           char *in, int token_in,
  68                           char *CApath, char *CAfile, char *untrusted,
  69                           X509_VERIFY_PARAM *vpm);
  70 static TS_VERIFY_CTX *create_verify_ctx(char *data, char *digest,
  71                                         char *queryfile,
  72                                         char *CApath, char *CAfile,
  73                                         char *untrusted,
  74                                         X509_VERIFY_PARAM *vpm);
  75 static X509_STORE *create_cert_store(char *CApath, 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 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, '<', "File with private key for reply"},
 110     {"signer", OPT_SIGNER, 's'},
 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 comand 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     char *CAfile = NULL, *untrusted = NULL, *engine = NULL, *prog, **helpp;
 157     char *configfile = default_config_file;
 158     char *section = NULL, *password = NULL;
 159     char *data = NULL, *digest = NULL, *rnd = NULL, *policy = NULL;
 160     char *in = NULL, *out = NULL, *queryfile = NULL, *passin = NULL;
 161     char *inkey = NULL, *signer = NULL, *chain = NULL, *CApath = NULL;
 162     const EVP_MD *md = NULL;
 163     OPTION_CHOICE o, mode = OPT_ERR;
 164     int ret = 1, no_nonce = 0, cert = 0, text = 0;
 165     int vpmtouched = 0;
 166     X509_VERIFY_PARAM *vpm = NULL;
 167     /* Input is ContentInfo instead of TimeStampResp. */
 168     int token_in = 0;
 169     /* Output is ContentInfo instead of TimeStampResp. */
 170     int token_out = 0;
 171
 172     if ((vpm = X509_VERIFY_PARAM_new()) == NULL)
 173         goto end;
 174
 175     prog = opt_init(argc, argv, ts_options);
 176     while ((o = opt_next()) != OPT_EOF) {
 177         switch (o) {
 178         case OPT_EOF:
 179         case OPT_ERR:
 180  opthelp:
 181             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
 182             goto end;
 183         case OPT_HELP:
 184             opt_help(ts_options);
 185             for (helpp = opt_helplist; *helpp; ++helpp)
 186                 BIO_printf(bio_err, "%s\n", *helpp);
 187             ret = 0;
 188             goto end;
 189         case OPT_CONFIG:
 190             configfile = opt_arg();
 191             break;
 192         case OPT_SECTION:
 193             section = opt_arg();
 194             break;
 195         case OPT_QUERY:
 196         case OPT_REPLY:
 197         case OPT_VERIFY:
 198             if (mode != OPT_ERR)
 199                 goto opthelp;
 200             mode = o;
 201             break;
 202         case OPT_DATA:
 203             data = opt_arg();
 204             break;
 205         case OPT_DIGEST:
 206             digest = opt_arg();
 207             break;
 208         case OPT_RAND:
 209             rnd = opt_arg();
 210             break;
 211         case OPT_TSPOLICY:
 212             policy = opt_arg();
 213             break;
 214         case OPT_NO_NONCE:
 215             no_nonce = 1;
 216             break;
 217         case OPT_CERT:
 218             cert = 1;
 219             break;
 220         case OPT_IN:
 221             in = opt_arg();
 222             break;
 223         case OPT_TOKEN_IN:
 224             token_in = 1;
 225             break;
 226         case OPT_OUT:
 227             out = opt_arg();
 228             break;
 229         case OPT_TOKEN_OUT:
 230             token_out = 1;
 231             break;
 232         case OPT_TEXT:
 233             text = 1;
 234             break;
 235         case OPT_QUERYFILE:
 236             queryfile = opt_arg();
 237             break;
 238         case OPT_PASSIN:
 239             passin = opt_arg();
 240             break;
 241         case OPT_INKEY:
 242             inkey = opt_arg();
 243             break;
 244         case OPT_SIGNER:
 245             signer = opt_arg();
 246             break;
 247         case OPT_CHAIN:
 248             chain = opt_arg();
 249             break;
 250         case OPT_CAPATH:
 251             CApath = opt_arg();
 252             break;
 253         case OPT_CAFILE:
 254             CAfile = opt_arg();
 255             break;
 256         case OPT_UNTRUSTED:
 257             untrusted = opt_arg();
 258             break;
 259         case OPT_ENGINE:
 260             engine = opt_arg();
 261             break;
 262         case OPT_MD:
 263             if (!opt_md(opt_unknown(), &md))
 264                 goto opthelp;
 265             break;
 266         case OPT_V_CASES:
 267             if (!opt_verify(o, vpm))
 268                 goto end;
 269             vpmtouched++;
 270             break;
 271         }
 272     }
 273     if (mode == OPT_ERR || opt_num_rest() != 0)
 274         goto opthelp;
 275
 276     /* Seed the random number generator if it is going to be used. */
 277     if (mode == OPT_QUERY && !no_nonce) {
 278         if (!app_RAND_load_file(NULL, 1) && rnd == NULL)
 279             BIO_printf(bio_err, "warning, not much extra random "
 280                        "data, consider using the -rand option\n");
 281         if (rnd != NULL)
 282             BIO_printf(bio_err, "%ld semi-random bytes loaded\n",
 283                        app_RAND_load_files(rnd));
 284     }
 285
 286     if (mode == OPT_REPLY && passin &&
 287         !app_passwd(passin, NULL, &password, NULL)) {
 288         BIO_printf(bio_err, "Error getting password.\n");
 289         goto end;
 290     }
 291
 292     conf = load_config_file(configfile);
 293     if (configfile != default_config_file && !app_load_modules(conf))
 294         goto end;
 295
 296     /* Check parameter consistency and execute the appropriate function. */
 297     switch (mode) {
 298     default:
 299     case OPT_ERR:
 300         goto opthelp;
 301     case OPT_QUERY:
 302         if (vpmtouched)
 303             goto opthelp;
 304         if ((data != NULL) && (digest != NULL))
 305             goto opthelp;
 306         ret = !query_command(data, digest, md, policy, no_nonce, cert,
 307                              in, out, text);
 308         break;
 309     case 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         break;
 322     case 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, untrusted,
 327                               vpmtouched ? vpm : NULL);
 328     }
 329
 330  end:
 331     X509_VERIFY_PARAM_free(vpm);
 332     app_RAND_write_file(NULL);
 333     NCONF_free(conf);
 334     OPENSSL_free(password);
 335     return (ret);
 336 }
 337
 338 /*
 339  * Configuration file-related function definitions.
 340  */
 341
 342 static ASN1_OBJECT *txt2obj(const char *oid)
 343 {
 344     ASN1_OBJECT *oid_obj = NULL;
 345
 346     if ((oid_obj = OBJ_txt2obj(oid, 0)) == NULL)
 347         BIO_printf(bio_err, "cannot convert %s to OID\n", oid);
 348
 349     return oid_obj;
 350 }
 351
 352 static CONF *load_config_file(const char *configfile)
 353 {
 354     CONF *conf = app_load_config(configfile);
 355
 356     if (conf != NULL) {
 357         const char *p;
 358
 359         BIO_printf(bio_err, "Using configuration from %s\n", configfile);
 360         p = NCONF_get_string(conf, NULL, ENV_OID_FILE);
 361         if (p != NULL) {
 362             BIO *oid_bio = BIO_new_file(p, "r");
 363             if (!oid_bio)
 364                 ERR_print_errors(bio_err);
 365             else {
 366                 OBJ_create_objects(oid_bio);
 367                 BIO_free_all(oid_bio);
 368             }
 369         } else
 370             ERR_clear_error();
 371         if (!add_oid_section(conf))
 372             ERR_print_errors(bio_err);
 373     }
 374     return conf;
 375 }
 376
 377 /*
 378  * Query-related method definitions.
 379  */
 380 static int query_command(const char *data, char *digest, const EVP_MD *md,
 381                          const char *policy, int no_nonce,
 382                          int cert, const char *in, const char *out, int text)
 383 {
 384     int ret = 0;
 385     TS_REQ *query = NULL;
 386     BIO *in_bio = NULL;
 387     BIO *data_bio = NULL;
 388     BIO *out_bio = NULL;
 389
 390     /* Build query object. */
 391     if (in != NULL) {
 392         if ((in_bio = bio_open_default(in, 'r', FORMAT_ASN1)) == NULL)
 393             goto end;
 394         query = d2i_TS_REQ_bio(in_bio, NULL);
 395     } else {
 396         if (digest == NULL
 397             && (data_bio = bio_open_default(data, 'r', FORMAT_ASN1)) == NULL)
 398             goto end;
 399         query = create_query(data_bio, digest, md, policy, no_nonce, cert);
 400     }
 401     if (query == NULL)
 402         goto end;
 403
 404     if (text) {
 405         if ((out_bio = bio_open_default(out, 'w', FORMAT_TEXT)) == NULL)
 406             goto end;
 407         if (!TS_REQ_print_bio(out_bio, query))
 408             goto end;
 409     } else {
 410         if ((out_bio = bio_open_default(out, 'w', FORMAT_ASN1)) == NULL)
 411             goto end;
 412         if (!i2d_TS_REQ_bio(out_bio, query))
 413             goto end;
 414     }
 415
 416     ret = 1;
 417
 418  end:
 419     ERR_print_errors(bio_err);
 420     BIO_free_all(in_bio);
 421     BIO_free_all(data_bio);
 422     BIO_free_all(out_bio);
 423     TS_REQ_free(query);
 424     return ret;
 425 }
 426
 427 static TS_REQ *create_query(BIO *data_bio, char *digest, const EVP_MD *md,
 428                             const char *policy, int no_nonce, int cert)
 429 {
 430     int ret = 0;
 431     TS_REQ *ts_req = NULL;
 432     int len;
 433     TS_MSG_IMPRINT *msg_imprint = NULL;
 434     X509_ALGOR *algo = NULL;
 435     unsigned char *data = NULL;
 436     ASN1_OBJECT *policy_obj = NULL;
 437     ASN1_INTEGER *nonce_asn1 = NULL;
 438
 439     if (md == NULL && (md = EVP_get_digestbyname("sha1")) == NULL)
 440         goto err;
 441     if ((ts_req = TS_REQ_new()) == NULL)
 442         goto err;
 443     if (!TS_REQ_set_version(ts_req, 1))
 444         goto err;
 445     if ((msg_imprint = TS_MSG_IMPRINT_new()) == NULL)
 446         goto err;
 447     if ((algo = X509_ALGOR_new()) == NULL)
 448         goto err;
 449     if ((algo->algorithm = OBJ_nid2obj(EVP_MD_type(md))) == NULL)
 450         goto err;
 451     if ((algo->parameter = ASN1_TYPE_new()) == NULL)
 452         goto err;
 453     algo->parameter->type = V_ASN1_NULL;
 454     if (!TS_MSG_IMPRINT_set_algo(msg_imprint, algo))
 455         goto err;
 456     if ((len = create_digest(data_bio, digest, md, &data)) == 0)
 457         goto err;
 458     if (!TS_MSG_IMPRINT_set_msg(msg_imprint, data, len))
 459         goto err;
 460     if (!TS_REQ_set_msg_imprint(ts_req, msg_imprint))
 461         goto err;
 462     if (policy && (policy_obj = txt2obj(policy)) == NULL)
 463         goto err;
 464     if (policy_obj && !TS_REQ_set_policy_id(ts_req, policy_obj))
 465         goto err;
 466
 467     /* Setting nonce if requested. */
 468     if (!no_nonce && (nonce_asn1 = create_nonce(NONCE_LENGTH)) == NULL)
 469         goto err;
 470     if (nonce_asn1 && !TS_REQ_set_nonce(ts_req, nonce_asn1))
 471         goto err;
 472     if (!TS_REQ_set_cert_req(ts_req, cert))
 473         goto err;
 474
 475     ret = 1;
 476  err:
 477     if (!ret) {
 478         TS_REQ_free(ts_req);
 479         ts_req = NULL;
 480         BIO_printf(bio_err, "could not create query\n");
 481         ERR_print_errors(bio_err);
 482     }
 483     TS_MSG_IMPRINT_free(msg_imprint);
 484     X509_ALGOR_free(algo);
 485     OPENSSL_free(data);
 486     ASN1_OBJECT_free(policy_obj);
 487     ASN1_INTEGER_free(nonce_asn1);
 488     return ts_req;
 489 }
 490
 491 static int create_digest(BIO *input, char *digest, const EVP_MD *md,
 492                          unsigned char **md_value)
 493 {
 494     int md_value_len;
 495
 496     md_value_len = EVP_MD_size(md);
 497     if (md_value_len < 0)
 498         return 0;
 499
 500     if (input) {
 501         EVP_MD_CTX *md_ctx = EVP_MD_CTX_new();
 502         unsigned char buffer[4096];
 503         int length;
 504
 505         if (md_ctx == NULL)
 506             return 0;
 507         *md_value = app_malloc(md_value_len, "digest buffer");
 508         EVP_DigestInit(md_ctx, md);
 509         while ((length = BIO_read(input, buffer, sizeof(buffer))) > 0) {
 510             EVP_DigestUpdate(md_ctx, buffer, length);
 511         }
 512         if (!EVP_DigestFinal(md_ctx, *md_value, NULL)) {
 513             EVP_MD_CTX_free(md_ctx);
 514             return 0;
 515         }
 516         EVP_MD_CTX_free(md_ctx);
 517     } else {
 518         long digest_len;
 519         *md_value = OPENSSL_hexstr2buf(digest, &digest_len);
 520         if (!*md_value || md_value_len != digest_len) {
 521             OPENSSL_free(*md_value);
 522             *md_value = NULL;
 523             BIO_printf(bio_err, "bad digest, %d bytes "
 524                        "must be specified\n", md_value_len);
 525             return 0;
 526         }
 527     }
 528     return md_value_len;
 529 }
 530
 531 static ASN1_INTEGER *create_nonce(int bits)
 532 {
 533     unsigned char buf[20];
 534     ASN1_INTEGER *nonce = NULL;
 535     int len = (bits - 1) / 8 + 1;
 536     int i;
 537
 538     if (len > (int)sizeof(buf))
 539         goto err;
 540     if (RAND_bytes(buf, len) <= 0)
 541         goto err;
 542
 543     /* Find the first non-zero byte and creating ASN1_INTEGER object. */
 544     for (i = 0; i < len && !buf[i]; ++i)
 545         continue;
 546     if ((nonce = ASN1_INTEGER_new()) == NULL)
 547         goto err;
 548     OPENSSL_free(nonce->data);
 549     nonce->length = len - i;
 550     nonce->data = app_malloc(nonce->length + 1, "nonce buffer");
 551     memcpy(nonce->data, buf + i, nonce->length);
 552     return nonce;
 553
 554  err:
 555     BIO_printf(bio_err, "could not create nonce\n");
 556     ASN1_INTEGER_free(nonce);
 557     return NULL;
 558 }
 559
 560 /*
 561  * Reply-related method definitions.
 562  */
 563
 564 static int reply_command(CONF *conf, char *section, char *engine,
 565                          char *queryfile, char *passin, char *inkey,
 566                          const EVP_MD *md, char *signer, char *chain,
 567                          const char *policy, char *in, int token_in,
 568                          char *out, int token_out, int text)
 569 {
 570     int ret = 0;
 571     TS_RESP *response = NULL;
 572     BIO *in_bio = NULL;
 573     BIO *query_bio = NULL;
 574     BIO *inkey_bio = NULL;
 575     BIO *signer_bio = NULL;
 576     BIO *out_bio = NULL;
 577
 578     if (in != NULL) {
 579         if ((in_bio = BIO_new_file(in, "rb")) == NULL)
 580             goto end;
 581         if (token_in) {
 582             response = read_PKCS7(in_bio);
 583         } else {
 584             response = d2i_TS_RESP_bio(in_bio, NULL);
 585         }
 586     } else {
 587         response = create_response(conf, section, engine, queryfile,
 588                                    passin, inkey, md, signer, chain, policy);
 589         if (response)
 590             BIO_printf(bio_err, "Response has been generated.\n");
 591         else
 592             BIO_printf(bio_err, "Response is not generated.\n");
 593     }
 594     if (response == NULL)
 595         goto end;
 596
 597     /* Write response. */
 598     if (text) {
 599         if ((out_bio = bio_open_default(out, 'w', FORMAT_TEXT)) == NULL)
 600         goto end;
 601         if (token_out) {
 602             TS_TST_INFO *tst_info = TS_RESP_get_tst_info(response);
 603             if (!TS_TST_INFO_print_bio(out_bio, tst_info))
 604                 goto end;
 605         } else {
 606             if (!TS_RESP_print_bio(out_bio, response))
 607                 goto end;
 608         }
 609     } else {
 610         if ((out_bio = bio_open_default(out, 'w', FORMAT_ASN1)) == NULL)
 611             goto end;
 612         if (token_out) {
 613             PKCS7 *token = TS_RESP_get_token(response);
 614             if (!i2d_PKCS7_bio(out_bio, token))
 615                 goto end;
 616         } else {
 617             if (!i2d_TS_RESP_bio(out_bio, response))
 618                 goto end;
 619         }
 620     }
 621
 622     ret = 1;
 623
 624  end:
 625     ERR_print_errors(bio_err);
 626     BIO_free_all(in_bio);
 627     BIO_free_all(query_bio);
 628     BIO_free_all(inkey_bio);
 629     BIO_free_all(signer_bio);
 630     BIO_free_all(out_bio);
 631     TS_RESP_free(response);
 632     return ret;
 633 }
 634
 635 /* Reads a PKCS7 token and adds default 'granted' status info to it. */
 636 static TS_RESP *read_PKCS7(BIO *in_bio)
 637 {
 638     int ret = 0;
 639     PKCS7 *token = NULL;
 640     TS_TST_INFO *tst_info = NULL;
 641     TS_RESP *resp = NULL;
 642     TS_STATUS_INFO *si = NULL;
 643
 644     if ((token = d2i_PKCS7_bio(in_bio, NULL)) == NULL)
 645         goto end;
 646     if ((tst_info = PKCS7_to_TS_TST_INFO(token)) == NULL)
 647         goto end;
 648     if ((resp = TS_RESP_new()) == NULL)
 649         goto end;
 650     if ((si = TS_STATUS_INFO_new()) == NULL)
 651         goto end;
 652     if (!TS_STATUS_INFO_set_status(si, TS_STATUS_GRANTED))
 653         goto end;
 654     if (!TS_RESP_set_status_info(resp, si))
 655         goto end;
 656     TS_RESP_set_tst_info(resp, token, tst_info);
 657     token = NULL;               /* Ownership is lost. */
 658     tst_info = NULL;            /* Ownership is lost. */
 659     ret = 1;
 660
 661  end:
 662     PKCS7_free(token);
 663     TS_TST_INFO_free(tst_info);
 664     if (!ret) {
 665         TS_RESP_free(resp);
 666         resp = NULL;
 667     }
 668     TS_STATUS_INFO_free(si);
 669     return resp;
 670 }
 671
 672 static TS_RESP *create_response(CONF *conf, const char *section, char *engine,
 673                                 char *queryfile, char *passin,
 674                                 char *inkey, const EVP_MD *md, char *signer,
 675                                 char *chain, const char *policy)
 676 {
 677     int ret = 0;
 678     TS_RESP *response = NULL;
 679     BIO *query_bio = NULL;
 680     TS_RESP_CTX *resp_ctx = NULL;
 681
 682     if ((query_bio = BIO_new_file(queryfile, "rb")) == NULL)
 683         goto end;
 684     if ((section = TS_CONF_get_tsa_section(conf, section)) == NULL)
 685         goto end;
 686     if ((resp_ctx = TS_RESP_CTX_new()) == NULL)
 687         goto end;
 688     if (!TS_CONF_set_serial(conf, section, serial_cb, resp_ctx))
 689         goto end;
 690 # ifndef OPENSSL_NO_ENGINE
 691     if (!TS_CONF_set_crypto_device(conf, section, engine))
 692         goto end;
 693 # endif
 694     if (!TS_CONF_set_signer_cert(conf, section, signer, resp_ctx))
 695         goto end;
 696     if (!TS_CONF_set_certs(conf, section, chain, resp_ctx))
 697         goto end;
 698     if (!TS_CONF_set_signer_key(conf, section, inkey, passin, resp_ctx))
 699         goto end;
 700
 701     if (md) {
 702         if (!TS_RESP_CTX_set_signer_digest(resp_ctx, md))
 703             goto end;
 704     } else if (!TS_CONF_set_signer_digest(conf, section, NULL, resp_ctx)) {
 705             goto end;
 706     }
 707
 708     if (!TS_CONF_set_def_policy(conf, section, policy, resp_ctx))
 709         goto end;
 710     if (!TS_CONF_set_policies(conf, section, resp_ctx))
 711         goto end;
 712     if (!TS_CONF_set_digests(conf, section, resp_ctx))
 713         goto end;
 714     if (!TS_CONF_set_accuracy(conf, section, resp_ctx))
 715         goto end;
 716     if (!TS_CONF_set_clock_precision_digits(conf, section, resp_ctx))
 717         goto end;
 718     if (!TS_CONF_set_ordering(conf, section, resp_ctx))
 719         goto end;
 720     if (!TS_CONF_set_tsa_name(conf, section, resp_ctx))
 721         goto end;
 722     if (!TS_CONF_set_ess_cert_id_chain(conf, section, resp_ctx))
 723         goto end;
 724     if ((response = TS_RESP_create_response(resp_ctx, query_bio)) == NULL)
 725         goto end;
 726     ret = 1;
 727
 728  end:
 729     if (!ret) {
 730         TS_RESP_free(response);
 731         response = NULL;
 732     }
 733     TS_RESP_CTX_free(resp_ctx);
 734     BIO_free_all(query_bio);
 735     return response;
 736 }
 737
 738 static ASN1_INTEGER *serial_cb(TS_RESP_CTX *ctx, void *data)
 739 {
 740     const char *serial_file = (const char *)data;
 741     ASN1_INTEGER *serial = next_serial(serial_file);
 742
 743     if (!serial) {
 744         TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
 745                                     "Error during serial number "
 746                                     "generation.");
 747         TS_RESP_CTX_add_failure_info(ctx, TS_INFO_ADD_INFO_NOT_AVAILABLE);
 748     } else
 749         save_ts_serial(serial_file, serial);
 750
 751     return serial;
 752 }
 753
 754 static ASN1_INTEGER *next_serial(const char *serialfile)
 755 {
 756     int ret = 0;
 757     BIO *in = NULL;
 758     ASN1_INTEGER *serial = NULL;
 759     BIGNUM *bn = NULL;
 760
 761     if ((serial = ASN1_INTEGER_new()) == NULL)
 762         goto err;
 763
 764     if ((in = BIO_new_file(serialfile, "r")) == NULL) {
 765         ERR_clear_error();
 766         BIO_printf(bio_err, "Warning: could not open file %s for "
 767                    "reading, using serial number: 1\n", serialfile);
 768         if (!ASN1_INTEGER_set(serial, 1))
 769             goto err;
 770     } else {
 771         char buf[1024];
 772         if (!a2i_ASN1_INTEGER(in, serial, buf, sizeof(buf))) {
 773             BIO_printf(bio_err, "unable to load number from %s\n",
 774                        serialfile);
 775             goto err;
 776         }
 777         if ((bn = ASN1_INTEGER_to_BN(serial, NULL)) == NULL)
 778             goto err;
 779         ASN1_INTEGER_free(serial);
 780         serial = NULL;
 781         if (!BN_add_word(bn, 1))
 782             goto err;
 783         if ((serial = BN_to_ASN1_INTEGER(bn, NULL)) == NULL)
 784             goto err;
 785     }
 786     ret = 1;
 787
 788  err:
 789     if (!ret) {
 790         ASN1_INTEGER_free(serial);
 791         serial = NULL;
 792     }
 793     BIO_free_all(in);
 794     BN_free(bn);
 795     return serial;
 796 }
 797
 798 static int save_ts_serial(const char *serialfile, ASN1_INTEGER *serial)
 799 {
 800     int ret = 0;
 801     BIO *out = NULL;
 802
 803     if ((out = BIO_new_file(serialfile, "w")) == NULL)
 804         goto err;
 805     if (i2a_ASN1_INTEGER(out, serial) <= 0)
 806         goto err;
 807     if (BIO_puts(out, "\n") <= 0)
 808         goto err;
 809     ret = 1;
 810  err:
 811     if (!ret)
 812         BIO_printf(bio_err, "could not save serial number to %s\n",
 813                    serialfile);
 814     BIO_free_all(out);
 815     return ret;
 816 }
 817
 818
 819 /*
 820  * Verify-related method definitions.
 821  */
 822
 823 static int verify_command(char *data, char *digest, char *queryfile,
 824                           char *in, int token_in,
 825                           char *CApath, char *CAfile, char *untrusted,
 826                           X509_VERIFY_PARAM *vpm)
 827 {
 828     BIO *in_bio = NULL;
 829     PKCS7 *token = NULL;
 830     TS_RESP *response = NULL;
 831     TS_VERIFY_CTX *verify_ctx = NULL;
 832     int ret = 0;
 833
 834     if ((in_bio = BIO_new_file(in, "rb")) == NULL)
 835         goto end;
 836     if (token_in) {
 837         if ((token = d2i_PKCS7_bio(in_bio, NULL)) == NULL)
 838             goto end;
 839     } else {
 840         if ((response = d2i_TS_RESP_bio(in_bio, NULL)) == NULL)
 841             goto end;
 842     }
 843
 844     if ((verify_ctx = create_verify_ctx(data, digest, queryfile,
 845                                         CApath, CAfile, untrusted,
 846                                         vpm)) == NULL)
 847         goto end;
 848
 849     ret = token_in
 850         ? TS_RESP_verify_token(verify_ctx, token)
 851         : TS_RESP_verify_response(verify_ctx, response);
 852
 853  end:
 854     printf("Verification: ");
 855     if (ret)
 856         printf("OK\n");
 857     else {
 858         printf("FAILED\n");
 859         ERR_print_errors(bio_err);
 860     }
 861
 862     BIO_free_all(in_bio);
 863     PKCS7_free(token);
 864     TS_RESP_free(response);
 865     TS_VERIFY_CTX_free(verify_ctx);
 866     return ret;
 867 }
 868
 869 static TS_VERIFY_CTX *create_verify_ctx(char *data, char *digest,
 870                                         char *queryfile,
 871                                         char *CApath, char *CAfile,
 872                                         char *untrusted,
 873                                         X509_VERIFY_PARAM *vpm)
 874 {
 875     TS_VERIFY_CTX *ctx = NULL;
 876     BIO *input = NULL;
 877     TS_REQ *request = NULL;
 878     int ret = 0;
 879     int f = 0;
 880
 881     if (data != NULL || digest != NULL) {
 882         if ((ctx = TS_VERIFY_CTX_new()) == NULL)
 883             goto err;
 884         f = TS_VFY_VERSION | TS_VFY_SIGNER;
 885         if (data != NULL) {
 886             f |= TS_VFY_DATA;
 887             if (TS_VERIFY_CTX_set_data(ctx, BIO_new_file(data, "rb")) == NULL)
 888                 goto err;
 889         } else if (digest != NULL) {
 890             long imprint_len;
 891             unsigned char *hexstr = OPENSSL_hexstr2buf(digest, &imprint_len);
 892             f |= TS_VFY_IMPRINT;
 893             if (TS_VERIFY_CTX_set_imprint(ctx, hexstr, imprint_len) == NULL) {
 894                 BIO_printf(bio_err, "invalid digest string\n");
 895                 goto err;
 896             }
 897         }
 898
 899     } else if (queryfile != NULL) {
 900         if ((input = BIO_new_file(queryfile, "rb")) == NULL)
 901             goto err;
 902         if ((request = d2i_TS_REQ_bio(input, NULL)) == NULL)
 903             goto err;
 904         if ((ctx = TS_REQ_to_TS_VERIFY_CTX(request, NULL)) == NULL)
 905             goto err;
 906     } else
 907         return NULL;
 908
 909     /* Add the signature verification flag and arguments. */
 910     TS_VERIFY_CTX_add_flags(ctx, f | TS_VFY_SIGNATURE);
 911
 912     /* Initialising the X509_STORE object. */
 913     if (TS_VERIFY_CTX_set_store(ctx, create_cert_store(CApath, CAfile, vpm))
 914             == NULL)
 915         goto err;
 916
 917     /* Loading untrusted certificates. */
 918     if (untrusted
 919         && TS_VERIFY_CTS_set_certs(ctx, TS_CONF_load_certs(untrusted)) == NULL)
 920         goto err;
 921     ret = 1;
 922
 923  err:
 924     if (!ret) {
 925         TS_VERIFY_CTX_free(ctx);
 926         ctx = NULL;
 927     }
 928     BIO_free_all(input);
 929     TS_REQ_free(request);
 930     return ctx;
 931 }
 932
 933 static X509_STORE *create_cert_store(char *CApath, char *CAfile, X509_VERIFY_PARAM *vpm)
 934 {
 935     X509_STORE *cert_ctx = NULL;
 936     X509_LOOKUP *lookup = NULL;
 937     int i;
 938
 939     cert_ctx = X509_STORE_new();
 940     X509_STORE_set_verify_cb(cert_ctx, verify_cb);
 941     if (CApath != NULL) {
 942         lookup = X509_STORE_add_lookup(cert_ctx, X509_LOOKUP_hash_dir());
 943         if (lookup == NULL) {
 944             BIO_printf(bio_err, "memory allocation failure\n");
 945             goto err;
 946         }
 947         i = X509_LOOKUP_add_dir(lookup, CApath, X509_FILETYPE_PEM);
 948         if (!i) {
 949             BIO_printf(bio_err, "Error loading directory %s\n", CApath);
 950             goto err;
 951         }
 952     }
 953
 954     if (CAfile != NULL) {
 955         lookup = X509_STORE_add_lookup(cert_ctx, X509_LOOKUP_file());
 956         if (lookup == NULL) {
 957             BIO_printf(bio_err, "memory allocation failure\n");
 958             goto err;
 959         }
 960         i = X509_LOOKUP_load_file(lookup, CAfile, X509_FILETYPE_PEM);
 961         if (!i) {
 962             BIO_printf(bio_err, "Error loading file %s\n", CAfile);
 963             goto err;
 964         }
 965     }
 966
 967     if (vpm != NULL)
 968         X509_STORE_set1_param(cert_ctx, vpm);
 969
 970     return cert_ctx;
 971
 972  err:
 973     X509_STORE_free(cert_ctx);
 974     return NULL;
 975 }
 976
 977 static int verify_cb(int ok, X509_STORE_CTX *ctx)
 978 {
 979     return ok;
 980 }
 981 #endif  /* ndef OPENSSL_NO_TS */