apps/ts.c

   1 /*
   2  * Copyright 2006-2018 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 "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, const char *untrusted,
  70                           X509_VERIFY_PARAM *vpm);
  71 static TS_VERIFY_CTX *create_verify_ctx(const char *data, const char *digest,
  72                                         const char *queryfile,
  73                                         const char *CApath, const char *CAfile,
  74                                         const char *untrusted,
  75                                         X509_VERIFY_PARAM *vpm);
  76 static X509_STORE *create_cert_store(const char *CApath, const char *CAfile,
  77                                      X509_VERIFY_PARAM *vpm);
  78 static int verify_cb(int ok, X509_STORE_CTX *ctx);
  79
  80 typedef enum OPTION_choice {
  81     OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
  82     OPT_ENGINE, OPT_CONFIG, OPT_SECTION, OPT_QUERY, OPT_DATA,
  83     OPT_DIGEST, OPT_TSPOLICY, OPT_NO_NONCE, OPT_CERT,
  84     OPT_IN, OPT_TOKEN_IN, OPT_OUT, OPT_TOKEN_OUT, OPT_TEXT,
  85     OPT_REPLY, OPT_QUERYFILE, OPT_PASSIN, OPT_INKEY, OPT_SIGNER,
  86     OPT_CHAIN, OPT_VERIFY, OPT_CAPATH, OPT_CAFILE, OPT_UNTRUSTED,
  87     OPT_MD, OPT_V_ENUM, OPT_R_ENUM
  88 } OPTION_CHOICE;
  89
  90 const OPTIONS ts_options[] = {
  91     {"help", OPT_HELP, '-', "Display this summary"},
  92     {"config", OPT_CONFIG, '<', "Configuration file"},
  93     {"section", OPT_SECTION, 's', "Section to use within config file"},
  94     {"query", OPT_QUERY, '-', "Generate a TS query"},
  95     {"data", OPT_DATA, '<', "File to hash"},
  96     {"digest", OPT_DIGEST, 's', "Digest (as a hex string)"},
  97     OPT_R_OPTIONS,
  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, *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_R_CASES:
 211             if (!opt_rand(o))
 212                 goto end;
 213             break;
 214         case OPT_TSPOLICY:
 215             policy = opt_arg();
 216             break;
 217         case OPT_NO_NONCE:
 218             no_nonce = 1;
 219             break;
 220         case OPT_CERT:
 221             cert = 1;
 222             break;
 223         case OPT_IN:
 224             in = opt_arg();
 225             break;
 226         case OPT_TOKEN_IN:
 227             token_in = 1;
 228             break;
 229         case OPT_OUT:
 230             out = opt_arg();
 231             break;
 232         case OPT_TOKEN_OUT:
 233             token_out = 1;
 234             break;
 235         case OPT_TEXT:
 236             text = 1;
 237             break;
 238         case OPT_QUERYFILE:
 239             queryfile = opt_arg();
 240             break;
 241         case OPT_PASSIN:
 242             passin = opt_arg();
 243             break;
 244         case OPT_INKEY:
 245             inkey = opt_arg();
 246             break;
 247         case OPT_SIGNER:
 248             signer = opt_arg();
 249             break;
 250         case OPT_CHAIN:
 251             chain = opt_arg();
 252             break;
 253         case OPT_CAPATH:
 254             CApath = opt_arg();
 255             break;
 256         case OPT_CAFILE:
 257             CAfile = opt_arg();
 258             break;
 259         case OPT_UNTRUSTED:
 260             untrusted = opt_arg();
 261             break;
 262         case OPT_ENGINE:
 263             engine = opt_arg();
 264             break;
 265         case OPT_MD:
 266             if (!opt_md(opt_unknown(), &md))
 267                 goto opthelp;
 268             break;
 269         case OPT_V_CASES:
 270             if (!opt_verify(o, vpm))
 271                 goto end;
 272             vpmtouched++;
 273             break;
 274         }
 275     }
 276     if (mode == OPT_ERR || opt_num_rest() != 0)
 277         goto opthelp;
 278
 279     if (mode == OPT_REPLY && passin &&
 280         !app_passwd(passin, NULL, &password, NULL)) {
 281         BIO_printf(bio_err, "Error getting password.\n");
 282         goto end;
 283     }
 284
 285     conf = load_config_file(configfile);
 286     if (configfile != default_config_file && !app_load_modules(conf))
 287         goto end;
 288
 289     /* Check parameter consistency and execute the appropriate function. */
 290     if (mode == OPT_QUERY) {
 291         if (vpmtouched)
 292             goto opthelp;
 293         if ((data != NULL) && (digest != NULL))
 294             goto opthelp;
 295         ret = !query_command(data, digest, md, policy, no_nonce, cert,
 296                              in, out, text);
 297     } else if (mode == OPT_REPLY) {
 298         if (vpmtouched)
 299             goto opthelp;
 300         if ((in != NULL) && (queryfile != NULL))
 301             goto opthelp;
 302         if (in == NULL) {
 303             if ((conf == NULL) || (token_in != 0))
 304                 goto opthelp;
 305         }
 306         ret = !reply_command(conf, section, engine, queryfile,
 307                              password, inkey, md, signer, chain, policy,
 308                              in, token_in, out, token_out, text);
 309
 310     } else if (mode == OPT_VERIFY) {
 311         if ((in == NULL) || !EXACTLY_ONE(queryfile, data, digest))
 312             goto opthelp;
 313         ret = !verify_command(data, digest, queryfile, in, token_in,
 314                               CApath, CAfile, untrusted,
 315                               vpmtouched ? vpm : NULL);
 316     } else {
 317         goto opthelp;
 318     }
 319
 320  end:
 321     X509_VERIFY_PARAM_free(vpm);
 322     NCONF_free(conf);
 323     OPENSSL_free(password);
 324     return ret;
 325 }
 326
 327 /*
 328  * Configuration file-related function definitions.
 329  */
 330
 331 static ASN1_OBJECT *txt2obj(const char *oid)
 332 {
 333     ASN1_OBJECT *oid_obj = NULL;
 334
 335     if ((oid_obj = OBJ_txt2obj(oid, 0)) == NULL)
 336         BIO_printf(bio_err, "cannot convert %s to OID\n", oid);
 337
 338     return oid_obj;
 339 }
 340
 341 static CONF *load_config_file(const char *configfile)
 342 {
 343     CONF *conf = app_load_config(configfile);
 344
 345     if (conf != NULL) {
 346         const char *p;
 347
 348         BIO_printf(bio_err, "Using configuration from %s\n", configfile);
 349         p = NCONF_get_string(conf, NULL, ENV_OID_FILE);
 350         if (p != NULL) {
 351             BIO *oid_bio = BIO_new_file(p, "r");
 352             if (!oid_bio)
 353                 ERR_print_errors(bio_err);
 354             else {
 355                 OBJ_create_objects(oid_bio);
 356                 BIO_free_all(oid_bio);
 357             }
 358         } else
 359             ERR_clear_error();
 360         if (!add_oid_section(conf))
 361             ERR_print_errors(bio_err);
 362     }
 363     return conf;
 364 }
 365
 366 /*
 367  * Query-related method definitions.
 368  */
 369 static int query_command(const char *data, const char *digest, const EVP_MD *md,
 370                          const char *policy, int no_nonce,
 371                          int cert, const char *in, const char *out, int text)
 372 {
 373     int ret = 0;
 374     TS_REQ *query = NULL;
 375     BIO *in_bio = NULL;
 376     BIO *data_bio = NULL;
 377     BIO *out_bio = NULL;
 378
 379     /* Build query object. */
 380     if (in != NULL) {
 381         if ((in_bio = bio_open_default(in, 'r', FORMAT_ASN1)) == NULL)
 382             goto end;
 383         query = d2i_TS_REQ_bio(in_bio, NULL);
 384     } else {
 385         if (digest == NULL
 386             && (data_bio = bio_open_default(data, 'r', FORMAT_ASN1)) == NULL)
 387             goto end;
 388         query = create_query(data_bio, digest, md, policy, no_nonce, cert);
 389     }
 390     if (query == NULL)
 391         goto end;
 392
 393     if (text) {
 394         if ((out_bio = bio_open_default(out, 'w', FORMAT_TEXT)) == NULL)
 395             goto end;
 396         if (!TS_REQ_print_bio(out_bio, query))
 397             goto end;
 398     } else {
 399         if ((out_bio = bio_open_default(out, 'w', FORMAT_ASN1)) == NULL)
 400             goto end;
 401         if (!i2d_TS_REQ_bio(out_bio, query))
 402             goto end;
 403     }
 404
 405     ret = 1;
 406
 407  end:
 408     ERR_print_errors(bio_err);
 409     BIO_free_all(in_bio);
 410     BIO_free_all(data_bio);
 411     BIO_free_all(out_bio);
 412     TS_REQ_free(query);
 413     return ret;
 414 }
 415
 416 static TS_REQ *create_query(BIO *data_bio, const char *digest, const EVP_MD *md,
 417                             const char *policy, int no_nonce, int cert)
 418 {
 419     int ret = 0;
 420     TS_REQ *ts_req = NULL;
 421     int len;
 422     TS_MSG_IMPRINT *msg_imprint = NULL;
 423     X509_ALGOR *algo = NULL;
 424     unsigned char *data = NULL;
 425     ASN1_OBJECT *policy_obj = NULL;
 426     ASN1_INTEGER *nonce_asn1 = NULL;
 427
 428     if (md == NULL && (md = EVP_get_digestbyname("sha1")) == NULL)
 429         goto err;
 430     if ((ts_req = TS_REQ_new()) == NULL)
 431         goto err;
 432     if (!TS_REQ_set_version(ts_req, 1))
 433         goto err;
 434     if ((msg_imprint = TS_MSG_IMPRINT_new()) == NULL)
 435         goto err;
 436     if ((algo = X509_ALGOR_new()) == NULL)
 437         goto err;
 438     if ((algo->algorithm = OBJ_nid2obj(EVP_MD_type(md))) == NULL)
 439         goto err;
 440     if ((algo->parameter = ASN1_TYPE_new()) == NULL)
 441         goto err;
 442     algo->parameter->type = V_ASN1_NULL;
 443     if (!TS_MSG_IMPRINT_set_algo(msg_imprint, algo))
 444         goto err;
 445     if ((len = create_digest(data_bio, digest, md, &data)) == 0)
 446         goto err;
 447     if (!TS_MSG_IMPRINT_set_msg(msg_imprint, data, len))
 448         goto err;
 449     if (!TS_REQ_set_msg_imprint(ts_req, msg_imprint))
 450         goto err;
 451     if (policy && (policy_obj = txt2obj(policy)) == NULL)
 452         goto err;
 453     if (policy_obj && !TS_REQ_set_policy_id(ts_req, policy_obj))
 454         goto err;
 455
 456     /* Setting nonce if requested. */
 457     if (!no_nonce && (nonce_asn1 = create_nonce(NONCE_LENGTH)) == NULL)
 458         goto err;
 459     if (nonce_asn1 && !TS_REQ_set_nonce(ts_req, nonce_asn1))
 460         goto err;
 461     if (!TS_REQ_set_cert_req(ts_req, cert))
 462         goto err;
 463
 464     ret = 1;
 465  err:
 466     if (!ret) {
 467         TS_REQ_free(ts_req);
 468         ts_req = NULL;
 469         BIO_printf(bio_err, "could not create query\n");
 470         ERR_print_errors(bio_err);
 471     }
 472     TS_MSG_IMPRINT_free(msg_imprint);
 473     X509_ALGOR_free(algo);
 474     OPENSSL_free(data);
 475     ASN1_OBJECT_free(policy_obj);
 476     ASN1_INTEGER_free(nonce_asn1);
 477     return ts_req;
 478 }
 479
 480 static int create_digest(BIO *input, const char *digest, const EVP_MD *md,
 481                          unsigned char **md_value)
 482 {
 483     int md_value_len;
 484     int rv = 0;
 485     EVP_MD_CTX *md_ctx = NULL;
 486
 487     md_value_len = EVP_MD_size(md);
 488     if (md_value_len < 0)
 489         return 0;
 490
 491     if (input != NULL) {
 492         unsigned char buffer[4096];
 493         int length;
 494
 495         md_ctx = EVP_MD_CTX_new();
 496         if (md_ctx == NULL)
 497             return 0;
 498         *md_value = app_malloc(md_value_len, "digest buffer");
 499         if (!EVP_DigestInit(md_ctx, md))
 500             goto err;
 501         while ((length = BIO_read(input, buffer, sizeof(buffer))) > 0) {
 502             if (!EVP_DigestUpdate(md_ctx, buffer, length))
 503                 goto err;
 504         }
 505         if (!EVP_DigestFinal(md_ctx, *md_value, NULL))
 506             goto err;
 507         md_value_len = EVP_MD_size(md);
 508     } else {
 509         long digest_len;
 510         *md_value = OPENSSL_hexstr2buf(digest, &digest_len);
 511         if (!*md_value || md_value_len != digest_len) {
 512             OPENSSL_free(*md_value);
 513             *md_value = NULL;
 514             BIO_printf(bio_err, "bad digest, %d bytes "
 515                        "must be specified\n", md_value_len);
 516             return 0;
 517         }
 518     }
 519     rv = md_value_len;
 520  err:
 521     EVP_MD_CTX_free(md_ctx);
 522     return rv;
 523 }
 524
 525 static ASN1_INTEGER *create_nonce(int bits)
 526 {
 527     unsigned char buf[20];
 528     ASN1_INTEGER *nonce = NULL;
 529     int len = (bits - 1) / 8 + 1;
 530     int i;
 531
 532     if (len > (int)sizeof(buf))
 533         goto err;
 534     if (RAND_bytes(buf, len) <= 0)
 535         goto err;
 536
 537     /* Find the first non-zero byte and creating ASN1_INTEGER object. */
 538     for (i = 0; i < len && !buf[i]; ++i)
 539         continue;
 540     if ((nonce = ASN1_INTEGER_new()) == NULL)
 541         goto err;
 542     OPENSSL_free(nonce->data);
 543     nonce->length = len - i;
 544     nonce->data = app_malloc(nonce->length + 1, "nonce buffer");
 545     memcpy(nonce->data, buf + i, nonce->length);
 546     return nonce;
 547
 548  err:
 549     BIO_printf(bio_err, "could not create nonce\n");
 550     ASN1_INTEGER_free(nonce);
 551     return NULL;
 552 }
 553
 554 /*
 555  * Reply-related method definitions.
 556  */
 557
 558 static int reply_command(CONF *conf, const char *section, const char *engine,
 559                          const char *queryfile, const char *passin, const char *inkey,
 560                          const EVP_MD *md, const char *signer, const char *chain,
 561                          const char *policy, const char *in, int token_in,
 562                          const char *out, int token_out, int text)
 563 {
 564     int ret = 0;
 565     TS_RESP *response = NULL;
 566     BIO *in_bio = NULL;
 567     BIO *query_bio = NULL;
 568     BIO *inkey_bio = NULL;
 569     BIO *signer_bio = NULL;
 570     BIO *out_bio = NULL;
 571
 572     if (in != NULL) {
 573         if ((in_bio = BIO_new_file(in, "rb")) == NULL)
 574             goto end;
 575         if (token_in) {
 576             response = read_PKCS7(in_bio);
 577         } else {
 578             response = d2i_TS_RESP_bio(in_bio, NULL);
 579         }
 580     } else {
 581         response = create_response(conf, section, engine, queryfile,
 582                                    passin, inkey, md, signer, chain, policy);
 583         if (response != NULL)
 584             BIO_printf(bio_err, "Response has been generated.\n");
 585         else
 586             BIO_printf(bio_err, "Response is not generated.\n");
 587     }
 588     if (response == NULL)
 589         goto end;
 590
 591     /* Write response. */
 592     if (text) {
 593         if ((out_bio = bio_open_default(out, 'w', FORMAT_TEXT)) == NULL)
 594         goto end;
 595         if (token_out) {
 596             TS_TST_INFO *tst_info = TS_RESP_get_tst_info(response);
 597             if (!TS_TST_INFO_print_bio(out_bio, tst_info))
 598                 goto end;
 599         } else {
 600             if (!TS_RESP_print_bio(out_bio, response))
 601                 goto end;
 602         }
 603     } else {
 604         if ((out_bio = bio_open_default(out, 'w', FORMAT_ASN1)) == NULL)
 605             goto end;
 606         if (token_out) {
 607             PKCS7 *token = TS_RESP_get_token(response);
 608             if (!i2d_PKCS7_bio(out_bio, token))
 609                 goto end;
 610         } else {
 611             if (!i2d_TS_RESP_bio(out_bio, response))
 612                 goto end;
 613         }
 614     }
 615
 616     ret = 1;
 617
 618  end:
 619     ERR_print_errors(bio_err);
 620     BIO_free_all(in_bio);
 621     BIO_free_all(query_bio);
 622     BIO_free_all(inkey_bio);
 623     BIO_free_all(signer_bio);
 624     BIO_free_all(out_bio);
 625     TS_RESP_free(response);
 626     return ret;
 627 }
 628
 629 /* Reads a PKCS7 token and adds default 'granted' status info to it. */
 630 static TS_RESP *read_PKCS7(BIO *in_bio)
 631 {
 632     int ret = 0;
 633     PKCS7 *token = NULL;
 634     TS_TST_INFO *tst_info = NULL;
 635     TS_RESP *resp = NULL;
 636     TS_STATUS_INFO *si = NULL;
 637
 638     if ((token = d2i_PKCS7_bio(in_bio, NULL)) == NULL)
 639         goto end;
 640     if ((tst_info = PKCS7_to_TS_TST_INFO(token)) == NULL)
 641         goto end;
 642     if ((resp = TS_RESP_new()) == NULL)
 643         goto end;
 644     if ((si = TS_STATUS_INFO_new()) == NULL)
 645         goto end;
 646     if (!TS_STATUS_INFO_set_status(si, TS_STATUS_GRANTED))
 647         goto end;
 648     if (!TS_RESP_set_status_info(resp, si))
 649         goto end;
 650     TS_RESP_set_tst_info(resp, token, tst_info);
 651     token = NULL;               /* Ownership is lost. */
 652     tst_info = NULL;            /* Ownership is lost. */
 653     ret = 1;
 654
 655  end:
 656     PKCS7_free(token);
 657     TS_TST_INFO_free(tst_info);
 658     if (!ret) {
 659         TS_RESP_free(resp);
 660         resp = NULL;
 661     }
 662     TS_STATUS_INFO_free(si);
 663     return resp;
 664 }
 665
 666 static TS_RESP *create_response(CONF *conf, const char *section, const char *engine,
 667                                 const char *queryfile, const char *passin,
 668                                 const char *inkey, const EVP_MD *md, const char *signer,
 669                                 const char *chain, const char *policy)
 670 {
 671     int ret = 0;
 672     TS_RESP *response = NULL;
 673     BIO *query_bio = NULL;
 674     TS_RESP_CTX *resp_ctx = NULL;
 675
 676     if ((query_bio = BIO_new_file(queryfile, "rb")) == NULL)
 677         goto end;
 678     if ((section = TS_CONF_get_tsa_section(conf, section)) == NULL)
 679         goto end;
 680     if ((resp_ctx = TS_RESP_CTX_new()) == NULL)
 681         goto end;
 682     if (!TS_CONF_set_serial(conf, section, serial_cb, resp_ctx))
 683         goto end;
 684 # ifndef OPENSSL_NO_ENGINE
 685     if (!TS_CONF_set_crypto_device(conf, section, engine))
 686         goto end;
 687 # endif
 688     if (!TS_CONF_set_signer_cert(conf, section, signer, resp_ctx))
 689         goto end;
 690     if (!TS_CONF_set_certs(conf, section, chain, resp_ctx))
 691         goto end;
 692     if (!TS_CONF_set_signer_key(conf, section, inkey, passin, resp_ctx))
 693         goto end;
 694
 695     if (md) {
 696         if (!TS_RESP_CTX_set_signer_digest(resp_ctx, md))
 697             goto end;
 698     } else if (!TS_CONF_set_signer_digest(conf, section, NULL, resp_ctx)) {
 699             goto end;
 700     }
 701
 702     if (!TS_CONF_set_ess_cert_id_digest(conf, section, resp_ctx))
 703         goto end;
 704     if (!TS_CONF_set_def_policy(conf, section, policy, resp_ctx))
 705         goto end;
 706     if (!TS_CONF_set_policies(conf, section, resp_ctx))
 707         goto end;
 708     if (!TS_CONF_set_digests(conf, section, resp_ctx))
 709         goto end;
 710     if (!TS_CONF_set_accuracy(conf, section, resp_ctx))
 711         goto end;
 712     if (!TS_CONF_set_clock_precision_digits(conf, section, resp_ctx))
 713         goto end;
 714     if (!TS_CONF_set_ordering(conf, section, resp_ctx))
 715         goto end;
 716     if (!TS_CONF_set_tsa_name(conf, section, resp_ctx))
 717         goto end;
 718     if (!TS_CONF_set_ess_cert_id_chain(conf, section, resp_ctx))
 719         goto end;
 720     if ((response = TS_RESP_create_response(resp_ctx, query_bio)) == NULL)
 721         goto end;
 722     ret = 1;
 723
 724  end:
 725     if (!ret) {
 726         TS_RESP_free(response);
 727         response = NULL;
 728     }
 729     TS_RESP_CTX_free(resp_ctx);
 730     BIO_free_all(query_bio);
 731     return response;
 732 }
 733
 734 static ASN1_INTEGER *serial_cb(TS_RESP_CTX *ctx, void *data)
 735 {
 736     const char *serial_file = (const char *)data;
 737     ASN1_INTEGER *serial = next_serial(serial_file);
 738
 739     if (serial == NULL) {
 740         TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
 741                                     "Error during serial number "
 742                                     "generation.");
 743         TS_RESP_CTX_add_failure_info(ctx, TS_INFO_ADD_INFO_NOT_AVAILABLE);
 744     } else {
 745         save_ts_serial(serial_file, serial);
 746     }
 747
 748     return serial;
 749 }
 750
 751 static ASN1_INTEGER *next_serial(const char *serialfile)
 752 {
 753     int ret = 0;
 754     BIO *in = NULL;
 755     ASN1_INTEGER *serial = NULL;
 756     BIGNUM *bn = NULL;
 757
 758     if ((serial = ASN1_INTEGER_new()) == NULL)
 759         goto err;
 760
 761     if ((in = BIO_new_file(serialfile, "r")) == NULL) {
 762         ERR_clear_error();
 763         BIO_printf(bio_err, "Warning: could not open file %s for "
 764                    "reading, using serial number: 1\n", serialfile);
 765         if (!ASN1_INTEGER_set(serial, 1))
 766             goto err;
 767     } else {
 768         char buf[1024];
 769         if (!a2i_ASN1_INTEGER(in, serial, buf, sizeof(buf))) {
 770             BIO_printf(bio_err, "unable to load number from %s\n",
 771                        serialfile);
 772             goto err;
 773         }
 774         if ((bn = ASN1_INTEGER_to_BN(serial, NULL)) == NULL)
 775             goto err;
 776         ASN1_INTEGER_free(serial);
 777         serial = NULL;
 778         if (!BN_add_word(bn, 1))
 779             goto err;
 780         if ((serial = BN_to_ASN1_INTEGER(bn, NULL)) == NULL)
 781             goto err;
 782     }
 783     ret = 1;
 784
 785  err:
 786     if (!ret) {
 787         ASN1_INTEGER_free(serial);
 788         serial = NULL;
 789     }
 790     BIO_free_all(in);
 791     BN_free(bn);
 792     return serial;
 793 }
 794
 795 static int save_ts_serial(const char *serialfile, ASN1_INTEGER *serial)
 796 {
 797     int ret = 0;
 798     BIO *out = NULL;
 799
 800     if ((out = BIO_new_file(serialfile, "w")) == NULL)
 801         goto err;
 802     if (i2a_ASN1_INTEGER(out, serial) <= 0)
 803         goto err;
 804     if (BIO_puts(out, "\n") <= 0)
 805         goto err;
 806     ret = 1;
 807  err:
 808     if (!ret)
 809         BIO_printf(bio_err, "could not save serial number to %s\n",
 810                    serialfile);
 811     BIO_free_all(out);
 812     return ret;
 813 }
 814
 815
 816 /*
 817  * Verify-related method definitions.
 818  */
 819
 820 static int verify_command(const char *data, const char *digest, const char *queryfile,
 821                           const char *in, int token_in,
 822                           const char *CApath, const char *CAfile, const char *untrusted,
 823                           X509_VERIFY_PARAM *vpm)
 824 {
 825     BIO *in_bio = NULL;
 826     PKCS7 *token = NULL;
 827     TS_RESP *response = NULL;
 828     TS_VERIFY_CTX *verify_ctx = NULL;
 829     int ret = 0;
 830
 831     if ((in_bio = BIO_new_file(in, "rb")) == NULL)
 832         goto end;
 833     if (token_in) {
 834         if ((token = d2i_PKCS7_bio(in_bio, NULL)) == NULL)
 835             goto end;
 836     } else {
 837         if ((response = d2i_TS_RESP_bio(in_bio, NULL)) == NULL)
 838             goto end;
 839     }
 840
 841     if ((verify_ctx = create_verify_ctx(data, digest, queryfile,
 842                                         CApath, CAfile, untrusted,
 843                                         vpm)) == NULL)
 844         goto end;
 845
 846     ret = token_in
 847         ? TS_RESP_verify_token(verify_ctx, token)
 848         : TS_RESP_verify_response(verify_ctx, response);
 849
 850  end:
 851     printf("Verification: ");
 852     if (ret)
 853         printf("OK\n");
 854     else {
 855         printf("FAILED\n");
 856         ERR_print_errors(bio_err);
 857     }
 858
 859     BIO_free_all(in_bio);
 860     PKCS7_free(token);
 861     TS_RESP_free(response);
 862     TS_VERIFY_CTX_free(verify_ctx);
 863     return ret;
 864 }
 865
 866 static TS_VERIFY_CTX *create_verify_ctx(const char *data, const char *digest,
 867                                         const char *queryfile,
 868                                         const char *CApath, const char *CAfile,
 869                                         const char *untrusted,
 870                                         X509_VERIFY_PARAM *vpm)
 871 {
 872     TS_VERIFY_CTX *ctx = NULL;
 873     BIO *input = NULL;
 874     TS_REQ *request = NULL;
 875     int ret = 0;
 876     int f = 0;
 877
 878     if (data != NULL || digest != NULL) {
 879         if ((ctx = TS_VERIFY_CTX_new()) == NULL)
 880             goto err;
 881         f = TS_VFY_VERSION | TS_VFY_SIGNER;
 882         if (data != NULL) {
 883             BIO *out = NULL;
 884
 885             f |= TS_VFY_DATA;
 886             if ((out = BIO_new_file(data, "rb")) == NULL)
 887                 goto err;
 888             if (TS_VERIFY_CTX_set_data(ctx, out) == NULL) {
 889                 BIO_free_all(out);
 890                 goto err;
 891             }
 892         } else if (digest != NULL) {
 893             long imprint_len;
 894             unsigned char *hexstr = OPENSSL_hexstr2buf(digest, &imprint_len);
 895             f |= TS_VFY_IMPRINT;
 896             if (TS_VERIFY_CTX_set_imprint(ctx, hexstr, imprint_len) == NULL) {
 897                 BIO_printf(bio_err, "invalid digest string\n");
 898                 goto err;
 899             }
 900         }
 901
 902     } else if (queryfile != NULL) {
 903         if ((input = BIO_new_file(queryfile, "rb")) == NULL)
 904             goto err;
 905         if ((request = d2i_TS_REQ_bio(input, NULL)) == NULL)
 906             goto err;
 907         if ((ctx = TS_REQ_to_TS_VERIFY_CTX(request, NULL)) == NULL)
 908             goto err;
 909     } else {
 910         return NULL;
 911     }
 912
 913     /* Add the signature verification flag and arguments. */
 914     TS_VERIFY_CTX_add_flags(ctx, f | TS_VFY_SIGNATURE);
 915
 916     /* Initialising the X509_STORE object. */
 917     if (TS_VERIFY_CTX_set_store(ctx, create_cert_store(CApath, CAfile, vpm))
 918             == NULL)
 919         goto err;
 920
 921     /* Loading untrusted certificates. */
 922     if (untrusted
 923         && TS_VERIFY_CTS_set_certs(ctx, TS_CONF_load_certs(untrusted)) == NULL)
 924         goto err;
 925     ret = 1;
 926
 927  err:
 928     if (!ret) {
 929         TS_VERIFY_CTX_free(ctx);
 930         ctx = NULL;
 931     }
 932     BIO_free_all(input);
 933     TS_REQ_free(request);
 934     return ctx;
 935 }
 936
 937 static X509_STORE *create_cert_store(const char *CApath, const char *CAfile,
 938                                      X509_VERIFY_PARAM *vpm)
 939 {
 940     X509_STORE *cert_ctx = NULL;
 941     X509_LOOKUP *lookup = NULL;
 942     int i;
 943
 944     cert_ctx = X509_STORE_new();
 945     X509_STORE_set_verify_cb(cert_ctx, verify_cb);
 946     if (CApath != NULL) {
 947         lookup = X509_STORE_add_lookup(cert_ctx, X509_LOOKUP_hash_dir());
 948         if (lookup == NULL) {
 949             BIO_printf(bio_err, "memory allocation failure\n");
 950             goto err;
 951         }
 952         i = X509_LOOKUP_add_dir(lookup, CApath, X509_FILETYPE_PEM);
 953         if (!i) {
 954             BIO_printf(bio_err, "Error loading directory %s\n", CApath);
 955             goto err;
 956         }
 957     }
 958
 959     if (CAfile != NULL) {
 960         lookup = X509_STORE_add_lookup(cert_ctx, X509_LOOKUP_file());
 961         if (lookup == NULL) {
 962             BIO_printf(bio_err, "memory allocation failure\n");
 963             goto err;
 964         }
 965         i = X509_LOOKUP_load_file(lookup, CAfile, X509_FILETYPE_PEM);
 966         if (!i) {
 967             BIO_printf(bio_err, "Error loading file %s\n", CAfile);
 968             goto err;
 969         }
 970     }
 971
 972     if (vpm != NULL)
 973         X509_STORE_set1_param(cert_ctx, vpm);
 974
 975     return cert_ctx;
 976
 977  err:
 978     X509_STORE_free(cert_ctx);
 979     return NULL;
 980 }
 981
 982 static int verify_cb(int ok, X509_STORE_CTX *ctx)
 983 {
 984     return ok;
 985 }
 986 #endif  /* ndef OPENSSL_NO_TS */