apps/ts.c

   1 /*
   2  * Copyright 2006-2020 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 #include <stdio.h>
  12 #include <stdlib.h>
  13 #include <string.h>
  14 #include "apps.h"
  15 #include "progs.h"
  16 #include <openssl/bio.h>
  17 #include <openssl/err.h>
  18 #include <openssl/pem.h>
  19 #include <openssl/rand.h>
  20 #include <openssl/ts.h>
  21 #include <openssl/bn.h>
  22
  23 /* Request nonce length, in bits (must be a multiple of 8). */
  24 #define NONCE_LENGTH            64
  25
  26 /* Name of config entry that defines the OID file. */
  27 #define ENV_OID_FILE            "oid_file"
  28
  29 /* Is |EXACTLY_ONE| of three pointers set? */
  30 #define EXACTLY_ONE(a, b, c) \
  31         (( a && !b && !c) || \
  32          ( b && !a && !c) || \
  33          ( c && !a && !b))
  34
  35 static ASN1_OBJECT *txt2obj(const char *oid);
  36 static CONF *load_config_file(const char *configfile);
  37
  38 /* Query related functions. */
  39 static int query_command(const char *data, const char *digest,
  40                          const EVP_MD *md, const char *policy, int no_nonce,
  41                          int cert, const char *in, const char *out, int text);
  42 static TS_REQ *create_query(BIO *data_bio, const char *digest, const EVP_MD *md,
  43                             const char *policy, int no_nonce, int cert);
  44 static int create_digest(BIO *input, const char *digest,
  45                          const EVP_MD *md, unsigned char **md_value);
  46 static ASN1_INTEGER *create_nonce(int bits);
  47
  48 /* Reply related functions. */
  49 static int reply_command(CONF *conf, const char *section, const char *engine,
  50                          const char *queryfile, const char *passin, const char *inkey,
  51                          const EVP_MD *md, const char *signer, const char *chain,
  52                          const char *policy, const char *in, int token_in,
  53                          const char *out, int token_out, int text);
  54 static TS_RESP *read_PKCS7(BIO *in_bio);
  55 static TS_RESP *create_response(CONF *conf, const char *section, const char *engine,
  56                                 const char *queryfile, const char *passin,
  57                                 const char *inkey, const EVP_MD *md, const char *signer,
  58                                 const char *chain, const char *policy);
  59 static ASN1_INTEGER *serial_cb(TS_RESP_CTX *ctx, void *data);
  60 static ASN1_INTEGER *next_serial(const char *serialfile);
  61 static int save_ts_serial(const char *serialfile, ASN1_INTEGER *serial);
  62
  63 /* Verify related functions. */
  64 static int verify_command(const char *data, const char *digest, const char *queryfile,
  65                           const char *in, int token_in,
  66                           const char *CApath, const char *CAfile,
  67                           const char *CAstore,
  68                           const char *untrusted, X509_VERIFY_PARAM *vpm);
  69 static TS_VERIFY_CTX *create_verify_ctx(const char *data, const char *digest,
  70                                         const char *queryfile,
  71                                         const char *CApath, const char *CAfile,
  72                                         const char *CAstore,
  73                                         const char *untrusted,
  74                                         X509_VERIFY_PARAM *vpm);
  75 static X509_STORE *create_cert_store(const char *CApath, const char *CAfile,
  76                                      const char *CAstore, 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_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_CASTORE, OPT_UNTRUSTED,
  86     OPT_MD, OPT_V_ENUM, OPT_R_ENUM, OPT_PROV_ENUM
  87 } OPTION_CHOICE;
  88
  89 const OPTIONS ts_options[] = {
  90     OPT_SECTION("General"),
  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 #ifndef OPENSSL_NO_ENGINE
  95     {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
  96 #endif
  97     {"inkey", OPT_INKEY, 's', "File with private key for reply"},
  98     {"signer", OPT_SIGNER, 's', "Signer certificate file"},
  99     {"chain", OPT_CHAIN, '<', "File with signer CA chain"},
 100     {"CAfile", OPT_CAFILE, '<', "File with trusted CA certs"},
 101     {"CApath", OPT_CAPATH, '/', "Path to trusted CA files"},
 102     {"CAstore", OPT_CASTORE, ':', "URI to trusted CA store"},
 103     {"untrusted", OPT_UNTRUSTED, '<', "File with untrusted certs"},
 104     {"token_in", OPT_TOKEN_IN, '-', "Input is a PKCS#7 file"},
 105     {"token_out", OPT_TOKEN_OUT, '-', "Output is a PKCS#7 file"},
 106     {"passin", OPT_PASSIN, 's', "Input file pass phrase source"},
 107     {"", OPT_MD, '-', "Any supported digest"},
 108
 109     OPT_SECTION("Query"),
 110     {"query", OPT_QUERY, '-', "Generate a TS query"},
 111     {"data", OPT_DATA, '<', "File to hash"},
 112     {"digest", OPT_DIGEST, 's', "Digest (as a hex string)"},
 113     {"queryfile", OPT_QUERYFILE, '<', "File containing a TS query"},
 114     {"cert", OPT_CERT, '-', "Put cert request into query"},
 115     {"in", OPT_IN, '<', "Input file"},
 116
 117     OPT_SECTION("Verify"),
 118     {"verify", OPT_VERIFY, '-', "Verify a TS response"},
 119     {"reply", OPT_REPLY, '-', "Generate a TS reply"},
 120     {"tspolicy", OPT_TSPOLICY, 's', "Policy OID to use"},
 121     {"no_nonce", OPT_NO_NONCE, '-', "Do not include a nonce"},
 122     {"out", OPT_OUT, '>', "Output file"},
 123     {"text", OPT_TEXT, '-', "Output text (not DER)"},
 124
 125     OPT_R_OPTIONS,
 126     OPT_V_OPTIONS,
 127     OPT_PROV_OPTIONS,
 128     {NULL}
 129 };
 130
 131 /*
 132  * This command is so complex, special help is needed.
 133  */
 134 static char* opt_helplist[] = {
 135     "",
 136     "Typical uses:",
 137     " openssl ts -query [-rand file...] [-config file] [-data file]",
 138     "    [-digest hexstring] [-tspolicy oid] [-no_nonce] [-cert]",
 139     "    [-in file] [-out file] [-text]",
 140     "",
 141     " openssl ts -reply [-config file] [-section tsa_section]",
 142     "    [-queryfile file] [-passin password]",
 143     "    [-signer tsa_cert.pem] [-inkey private_key.pem]",
 144     "    [-chain certs_file.pem] [-tspolicy oid]",
 145     "    [-in file] [-token_in] [-out file] [-token_out]",
 146 #ifndef OPENSSL_NO_ENGINE
 147     "    [-text] [-engine id]",
 148 #else
 149     "    [-text]",
 150 #endif
 151     "",
 152     " openssl ts -verify -CApath dir -CAfile file.pem -CAstore uri",
 153     "   -untrusted file.pem [-data file] [-digest hexstring]",
 154     "    [-queryfile file] -in file [-token_in] ...",
 155     NULL,
 156 };
 157
 158 int ts_main(int argc, char **argv)
 159 {
 160     CONF *conf = NULL;
 161     const char *CAfile = NULL, *untrusted = NULL, *prog;
 162     const char *configfile = default_config_file, *engine = NULL;
 163     const char *section = NULL;
 164     char **helpp;
 165     char *password = NULL;
 166     char *data = NULL, *digest = NULL, *policy = NULL;
 167     char *in = NULL, *out = NULL, *queryfile = NULL, *passin = NULL;
 168     char *inkey = NULL, *signer = NULL, *chain = NULL, *CApath = NULL;
 169     char *CAstore = NULL;
 170     const EVP_MD *md = NULL;
 171     OPTION_CHOICE o, mode = OPT_ERR;
 172     int ret = 1, no_nonce = 0, cert = 0, text = 0;
 173     int vpmtouched = 0;
 174     X509_VERIFY_PARAM *vpm = NULL;
 175     /* Input is ContentInfo instead of TimeStampResp. */
 176     int token_in = 0;
 177     /* Output is ContentInfo instead of TimeStampResp. */
 178     int token_out = 0;
 179
 180     if ((vpm = X509_VERIFY_PARAM_new()) == NULL)
 181         goto end;
 182
 183     prog = opt_init(argc, argv, ts_options);
 184     while ((o = opt_next()) != OPT_EOF) {
 185         switch (o) {
 186         case OPT_EOF:
 187         case OPT_ERR:
 188  opthelp:
 189             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
 190             goto end;
 191         case OPT_HELP:
 192             opt_help(ts_options);
 193             for (helpp = opt_helplist; *helpp; ++helpp)
 194                 BIO_printf(bio_err, "%s\n", *helpp);
 195             ret = 0;
 196             goto end;
 197         case OPT_CONFIG:
 198             configfile = opt_arg();
 199             break;
 200         case OPT_SECTION:
 201             section = opt_arg();
 202             break;
 203         case OPT_QUERY:
 204         case OPT_REPLY:
 205         case OPT_VERIFY:
 206             if (mode != OPT_ERR)
 207                 goto opthelp;
 208             mode = o;
 209             break;
 210         case OPT_DATA:
 211             data = opt_arg();
 212             break;
 213         case OPT_DIGEST:
 214             digest = opt_arg();
 215             break;
 216         case OPT_R_CASES:
 217             if (!opt_rand(o))
 218                 goto end;
 219             break;
 220         case OPT_PROV_CASES:
 221             if (!opt_provider(o))
 222                 goto end;
 223             break;
 224         case OPT_TSPOLICY:
 225             policy = opt_arg();
 226             break;
 227         case OPT_NO_NONCE:
 228             no_nonce = 1;
 229             break;
 230         case OPT_CERT:
 231             cert = 1;
 232             break;
 233         case OPT_IN:
 234             in = opt_arg();
 235             break;
 236         case OPT_TOKEN_IN:
 237             token_in = 1;
 238             break;
 239         case OPT_OUT:
 240             out = opt_arg();
 241             break;
 242         case OPT_TOKEN_OUT:
 243             token_out = 1;
 244             break;
 245         case OPT_TEXT:
 246             text = 1;
 247             break;
 248         case OPT_QUERYFILE:
 249             queryfile = opt_arg();
 250             break;
 251         case OPT_PASSIN:
 252             passin = opt_arg();
 253             break;
 254         case OPT_INKEY:
 255             inkey = opt_arg();
 256             break;
 257         case OPT_SIGNER:
 258             signer = opt_arg();
 259             break;
 260         case OPT_CHAIN:
 261             chain = opt_arg();
 262             break;
 263         case OPT_CAPATH:
 264             CApath = opt_arg();
 265             break;
 266         case OPT_CAFILE:
 267             CAfile = opt_arg();
 268             break;
 269         case OPT_CASTORE:
 270             CAstore = opt_arg();
 271             break;
 272         case OPT_UNTRUSTED:
 273             untrusted = opt_arg();
 274             break;
 275         case OPT_ENGINE:
 276             engine = opt_arg();
 277             break;
 278         case OPT_MD:
 279             if (!opt_md(opt_unknown(), &md))
 280                 goto opthelp;
 281             break;
 282         case OPT_V_CASES:
 283             if (!opt_verify(o, vpm))
 284                 goto end;
 285             vpmtouched++;
 286             break;
 287         }
 288     }
 289
 290     /* No extra arguments. */
 291     argc = opt_num_rest();
 292     if (argc != 0 || mode == OPT_ERR)
 293         goto opthelp;
 294
 295     app_RAND_load();
 296     if (mode == OPT_REPLY && passin &&
 297         !app_passwd(passin, NULL, &password, NULL)) {
 298         BIO_printf(bio_err, "Error getting password.\n");
 299         goto end;
 300     }
 301
 302     if ((conf = load_config_file(configfile)) == NULL)
 303         goto end;
 304     if (configfile != default_config_file && !app_load_modules(conf))
 305         goto end;
 306
 307     /* Check parameter consistency and execute the appropriate function. */
 308     if (mode == OPT_QUERY) {
 309         if (vpmtouched)
 310             goto opthelp;
 311         if ((data != NULL) && (digest != NULL))
 312             goto opthelp;
 313         ret = !query_command(data, digest, md, policy, no_nonce, cert,
 314                              in, out, text);
 315     } else if (mode == OPT_REPLY) {
 316         if (vpmtouched)
 317             goto opthelp;
 318         if ((in != NULL) && (queryfile != NULL))
 319             goto opthelp;
 320         if (in == NULL) {
 321             if ((conf == NULL) || (token_in != 0))
 322                 goto opthelp;
 323         }
 324         ret = !reply_command(conf, section, engine, queryfile,
 325                              password, inkey, md, signer, chain, policy,
 326                              in, token_in, out, token_out, text);
 327
 328     } else if (mode == OPT_VERIFY) {
 329         if ((in == NULL) || !EXACTLY_ONE(queryfile, data, digest))
 330             goto opthelp;
 331         ret = !verify_command(data, digest, queryfile, in, token_in,
 332                               CApath, CAfile, CAstore, untrusted,
 333                               vpmtouched ? vpm : NULL);
 334     } else {
 335         goto opthelp;
 336     }
 337
 338  end:
 339     X509_VERIFY_PARAM_free(vpm);
 340     NCONF_free(conf);
 341     OPENSSL_free(password);
 342     return ret;
 343 }
 344
 345 /*
 346  * Configuration file-related function definitions.
 347  */
 348
 349 static ASN1_OBJECT *txt2obj(const char *oid)
 350 {
 351     ASN1_OBJECT *oid_obj = NULL;
 352
 353     if ((oid_obj = OBJ_txt2obj(oid, 0)) == NULL)
 354         BIO_printf(bio_err, "cannot convert %s to OID\n", oid);
 355
 356     return oid_obj;
 357 }
 358
 359 static CONF *load_config_file(const char *configfile)
 360 {
 361     CONF *conf = app_load_config(configfile);
 362
 363     if (conf != NULL) {
 364         const char *p;
 365
 366         BIO_printf(bio_err, "Using configuration from %s\n", configfile);
 367         p = NCONF_get_string(conf, NULL, ENV_OID_FILE);
 368         if (p != NULL) {
 369             BIO *oid_bio = BIO_new_file(p, "r");
 370             if (!oid_bio)
 371                 ERR_print_errors(bio_err);
 372             else {
 373                 OBJ_create_objects(oid_bio);
 374                 BIO_free_all(oid_bio);
 375             }
 376         } else
 377             ERR_clear_error();
 378         if (!add_oid_section(conf))
 379             ERR_print_errors(bio_err);
 380     }
 381     return conf;
 382 }
 383
 384 /*
 385  * Query-related method definitions.
 386  */
 387 static int query_command(const char *data, const char *digest, const EVP_MD *md,
 388                          const char *policy, int no_nonce,
 389                          int cert, const char *in, const char *out, int text)
 390 {
 391     int ret = 0;
 392     TS_REQ *query = NULL;
 393     BIO *in_bio = NULL;
 394     BIO *data_bio = NULL;
 395     BIO *out_bio = NULL;
 396
 397     /* Build query object. */
 398     if (in != NULL) {
 399         if ((in_bio = bio_open_default(in, 'r', FORMAT_ASN1)) == NULL)
 400             goto end;
 401         query = d2i_TS_REQ_bio(in_bio, NULL);
 402     } else {
 403         if (digest == NULL
 404             && (data_bio = bio_open_default(data, 'r', FORMAT_ASN1)) == NULL)
 405             goto end;
 406         query = create_query(data_bio, digest, md, policy, no_nonce, cert);
 407     }
 408     if (query == NULL)
 409         goto end;
 410
 411     if (text) {
 412         if ((out_bio = bio_open_default(out, 'w', FORMAT_TEXT)) == NULL)
 413             goto end;
 414         if (!TS_REQ_print_bio(out_bio, query))
 415             goto end;
 416     } else {
 417         if ((out_bio = bio_open_default(out, 'w', FORMAT_ASN1)) == NULL)
 418             goto end;
 419         if (!i2d_TS_REQ_bio(out_bio, query))
 420             goto end;
 421     }
 422
 423     ret = 1;
 424
 425  end:
 426     ERR_print_errors(bio_err);
 427     BIO_free_all(in_bio);
 428     BIO_free_all(data_bio);
 429     BIO_free_all(out_bio);
 430     TS_REQ_free(query);
 431     return ret;
 432 }
 433
 434 static TS_REQ *create_query(BIO *data_bio, const char *digest, const EVP_MD *md,
 435                             const char *policy, int no_nonce, int cert)
 436 {
 437     int ret = 0;
 438     TS_REQ *ts_req = NULL;
 439     int len;
 440     TS_MSG_IMPRINT *msg_imprint = NULL;
 441     X509_ALGOR *algo = NULL;
 442     unsigned char *data = NULL;
 443     ASN1_OBJECT *policy_obj = NULL;
 444     ASN1_INTEGER *nonce_asn1 = NULL;
 445
 446     if (md == NULL && (md = EVP_get_digestbyname("sha256")) == NULL)
 447         goto err;
 448     if ((ts_req = TS_REQ_new()) == NULL)
 449         goto err;
 450     if (!TS_REQ_set_version(ts_req, 1))
 451         goto err;
 452     if ((msg_imprint = TS_MSG_IMPRINT_new()) == NULL)
 453         goto err;
 454     if ((algo = X509_ALGOR_new()) == NULL)
 455         goto err;
 456     if ((algo->algorithm = OBJ_nid2obj(EVP_MD_type(md))) == NULL)
 457         goto err;
 458     if ((algo->parameter = ASN1_TYPE_new()) == NULL)
 459         goto err;
 460     algo->parameter->type = V_ASN1_NULL;
 461     if (!TS_MSG_IMPRINT_set_algo(msg_imprint, algo))
 462         goto err;
 463     if ((len = create_digest(data_bio, digest, md, &data)) == 0)
 464         goto err;
 465     if (!TS_MSG_IMPRINT_set_msg(msg_imprint, data, len))
 466         goto err;
 467     if (!TS_REQ_set_msg_imprint(ts_req, msg_imprint))
 468         goto err;
 469     if (policy && (policy_obj = txt2obj(policy)) == NULL)
 470         goto err;
 471     if (policy_obj && !TS_REQ_set_policy_id(ts_req, policy_obj))
 472         goto err;
 473
 474     /* Setting nonce if requested. */
 475     if (!no_nonce && (nonce_asn1 = create_nonce(NONCE_LENGTH)) == NULL)
 476         goto err;
 477     if (nonce_asn1 && !TS_REQ_set_nonce(ts_req, nonce_asn1))
 478         goto err;
 479     if (!TS_REQ_set_cert_req(ts_req, cert))
 480         goto err;
 481
 482     ret = 1;
 483  err:
 484     if (!ret) {
 485         TS_REQ_free(ts_req);
 486         ts_req = NULL;
 487         BIO_printf(bio_err, "could not create query\n");
 488         ERR_print_errors(bio_err);
 489     }
 490     TS_MSG_IMPRINT_free(msg_imprint);
 491     X509_ALGOR_free(algo);
 492     OPENSSL_free(data);
 493     ASN1_OBJECT_free(policy_obj);
 494     ASN1_INTEGER_free(nonce_asn1);
 495     return ts_req;
 496 }
 497
 498 static int create_digest(BIO *input, const char *digest, const EVP_MD *md,
 499                          unsigned char **md_value)
 500 {
 501     int md_value_len;
 502     int rv = 0;
 503     EVP_MD_CTX *md_ctx = NULL;
 504
 505     md_value_len = EVP_MD_size(md);
 506     if (md_value_len < 0)
 507         return 0;
 508
 509     if (input != NULL) {
 510         unsigned char buffer[4096];
 511         int length;
 512
 513         md_ctx = EVP_MD_CTX_new();
 514         if (md_ctx == NULL)
 515             return 0;
 516         *md_value = app_malloc(md_value_len, "digest buffer");
 517         if (!EVP_DigestInit(md_ctx, md))
 518             goto err;
 519         while ((length = BIO_read(input, buffer, sizeof(buffer))) > 0) {
 520             if (!EVP_DigestUpdate(md_ctx, buffer, length))
 521                 goto err;
 522         }
 523         if (!EVP_DigestFinal(md_ctx, *md_value, NULL))
 524             goto err;
 525         md_value_len = EVP_MD_size(md);
 526     } else {
 527         long digest_len;
 528
 529         *md_value = OPENSSL_hexstr2buf(digest, &digest_len);
 530         if (*md_value == NULL || md_value_len != digest_len) {
 531             OPENSSL_free(*md_value);
 532             *md_value = NULL;
 533             BIO_printf(bio_err, "bad digest, %d bytes "
 534                        "must be specified\n", md_value_len);
 535             return 0;
 536         }
 537     }
 538     rv = md_value_len;
 539  err:
 540     EVP_MD_CTX_free(md_ctx);
 541     return rv;
 542 }
 543
 544 static ASN1_INTEGER *create_nonce(int bits)
 545 {
 546     unsigned char buf[20];
 547     ASN1_INTEGER *nonce = NULL;
 548     int len = (bits - 1) / 8 + 1;
 549     int i;
 550
 551     if (len > (int)sizeof(buf))
 552         goto err;
 553     if (RAND_bytes(buf, len) <= 0)
 554         goto err;
 555
 556     /* Find the first non-zero byte and creating ASN1_INTEGER object. */
 557     for (i = 0; i < len && !buf[i]; ++i)
 558         continue;
 559     if ((nonce = ASN1_INTEGER_new()) == NULL)
 560         goto err;
 561     OPENSSL_free(nonce->data);
 562     nonce->length = len - i;
 563     nonce->data = app_malloc(nonce->length + 1, "nonce buffer");
 564     memcpy(nonce->data, buf + i, nonce->length);
 565     return nonce;
 566
 567  err:
 568     BIO_printf(bio_err, "could not create nonce\n");
 569     ASN1_INTEGER_free(nonce);
 570     return NULL;
 571 }
 572
 573 /*
 574  * Reply-related method definitions.
 575  */
 576
 577 static int reply_command(CONF *conf, const char *section, const char *engine,
 578                          const char *queryfile, const char *passin, const char *inkey,
 579                          const EVP_MD *md, const char *signer, const char *chain,
 580                          const char *policy, const char *in, int token_in,
 581                          const char *out, int token_out, int text)
 582 {
 583     int ret = 0;
 584     TS_RESP *response = NULL;
 585     BIO *in_bio = NULL;
 586     BIO *query_bio = NULL;
 587     BIO *inkey_bio = NULL;
 588     BIO *signer_bio = NULL;
 589     BIO *out_bio = NULL;
 590
 591     if (in != NULL) {
 592         if ((in_bio = BIO_new_file(in, "rb")) == NULL)
 593             goto end;
 594         if (token_in) {
 595             response = read_PKCS7(in_bio);
 596         } else {
 597             response = d2i_TS_RESP_bio(in_bio, NULL);
 598         }
 599     } else {
 600         response = create_response(conf, section, engine, queryfile,
 601                                    passin, inkey, md, signer, chain, policy);
 602         if (response != NULL)
 603             BIO_printf(bio_err, "Response has been generated.\n");
 604         else
 605             BIO_printf(bio_err, "Response is not generated.\n");
 606     }
 607     if (response == NULL)
 608         goto end;
 609
 610     /* Write response. */
 611     if (text) {
 612         if ((out_bio = bio_open_default(out, 'w', FORMAT_TEXT)) == NULL)
 613         goto end;
 614         if (token_out) {
 615             TS_TST_INFO *tst_info = TS_RESP_get_tst_info(response);
 616             if (!TS_TST_INFO_print_bio(out_bio, tst_info))
 617                 goto end;
 618         } else {
 619             if (!TS_RESP_print_bio(out_bio, response))
 620                 goto end;
 621         }
 622     } else {
 623         if ((out_bio = bio_open_default(out, 'w', FORMAT_ASN1)) == NULL)
 624             goto end;
 625         if (token_out) {
 626             PKCS7 *token = TS_RESP_get_token(response);
 627             if (!i2d_PKCS7_bio(out_bio, token))
 628                 goto end;
 629         } else {
 630             if (!i2d_TS_RESP_bio(out_bio, response))
 631                 goto end;
 632         }
 633     }
 634
 635     ret = 1;
 636
 637  end:
 638     ERR_print_errors(bio_err);
 639     BIO_free_all(in_bio);
 640     BIO_free_all(query_bio);
 641     BIO_free_all(inkey_bio);
 642     BIO_free_all(signer_bio);
 643     BIO_free_all(out_bio);
 644     TS_RESP_free(response);
 645     return ret;
 646 }
 647
 648 /* Reads a PKCS7 token and adds default 'granted' status info to it. */
 649 static TS_RESP *read_PKCS7(BIO *in_bio)
 650 {
 651     int ret = 0;
 652     PKCS7 *token = NULL;
 653     TS_TST_INFO *tst_info = NULL;
 654     TS_RESP *resp = NULL;
 655     TS_STATUS_INFO *si = NULL;
 656
 657     if ((token = d2i_PKCS7_bio(in_bio, NULL)) == NULL)
 658         goto end;
 659     if ((tst_info = PKCS7_to_TS_TST_INFO(token)) == NULL)
 660         goto end;
 661     if ((resp = TS_RESP_new()) == NULL)
 662         goto end;
 663     if ((si = TS_STATUS_INFO_new()) == NULL)
 664         goto end;
 665     if (!TS_STATUS_INFO_set_status(si, TS_STATUS_GRANTED))
 666         goto end;
 667     if (!TS_RESP_set_status_info(resp, si))
 668         goto end;
 669     TS_RESP_set_tst_info(resp, token, tst_info);
 670     token = NULL;               /* Ownership is lost. */
 671     tst_info = NULL;            /* Ownership is lost. */
 672     ret = 1;
 673
 674  end:
 675     PKCS7_free(token);
 676     TS_TST_INFO_free(tst_info);
 677     if (!ret) {
 678         TS_RESP_free(resp);
 679         resp = NULL;
 680     }
 681     TS_STATUS_INFO_free(si);
 682     return resp;
 683 }
 684
 685 static TS_RESP *create_response(CONF *conf, const char *section, const char *engine,
 686                                 const char *queryfile, const char *passin,
 687                                 const char *inkey, const EVP_MD *md, const char *signer,
 688                                 const char *chain, const char *policy)
 689 {
 690     int ret = 0;
 691     TS_RESP *response = NULL;
 692     BIO *query_bio = NULL;
 693     TS_RESP_CTX *resp_ctx = NULL;
 694
 695     if ((query_bio = BIO_new_file(queryfile, "rb")) == NULL)
 696         goto end;
 697     if ((section = TS_CONF_get_tsa_section(conf, section)) == NULL)
 698         goto end;
 699     if ((resp_ctx = TS_RESP_CTX_new()) == NULL)
 700         goto end;
 701     if (!TS_CONF_set_serial(conf, section, serial_cb, resp_ctx))
 702         goto end;
 703 #ifndef OPENSSL_NO_ENGINE
 704     if (!TS_CONF_set_crypto_device(conf, section, engine))
 705         goto end;
 706 #endif
 707     if (!TS_CONF_set_signer_cert(conf, section, signer, resp_ctx))
 708         goto end;
 709     if (!TS_CONF_set_certs(conf, section, chain, resp_ctx))
 710         goto end;
 711     if (!TS_CONF_set_signer_key(conf, section, inkey, passin, resp_ctx))
 712         goto end;
 713
 714     if (md) {
 715         if (!TS_RESP_CTX_set_signer_digest(resp_ctx, md))
 716             goto end;
 717     } else if (!TS_CONF_set_signer_digest(conf, section, NULL, resp_ctx)) {
 718             goto end;
 719     }
 720
 721     if (!TS_CONF_set_ess_cert_id_digest(conf, section, resp_ctx))
 722         goto end;
 723     if (!TS_CONF_set_def_policy(conf, section, policy, resp_ctx))
 724         goto end;
 725     if (!TS_CONF_set_policies(conf, section, resp_ctx))
 726         goto end;
 727     if (!TS_CONF_set_digests(conf, section, resp_ctx))
 728         goto end;
 729     if (!TS_CONF_set_accuracy(conf, section, resp_ctx))
 730         goto end;
 731     if (!TS_CONF_set_clock_precision_digits(conf, section, resp_ctx))
 732         goto end;
 733     if (!TS_CONF_set_ordering(conf, section, resp_ctx))
 734         goto end;
 735     if (!TS_CONF_set_tsa_name(conf, section, resp_ctx))
 736         goto end;
 737     if (!TS_CONF_set_ess_cert_id_chain(conf, section, resp_ctx))
 738         goto end;
 739     if ((response = TS_RESP_create_response(resp_ctx, query_bio)) == NULL)
 740         goto end;
 741     ret = 1;
 742
 743  end:
 744     if (!ret) {
 745         TS_RESP_free(response);
 746         response = NULL;
 747     }
 748     TS_RESP_CTX_free(resp_ctx);
 749     BIO_free_all(query_bio);
 750     return response;
 751 }
 752
 753 static ASN1_INTEGER *serial_cb(TS_RESP_CTX *ctx, void *data)
 754 {
 755     const char *serial_file = (const char *)data;
 756     ASN1_INTEGER *serial = next_serial(serial_file);
 757
 758     if (serial == NULL) {
 759         TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
 760                                     "Error during serial number "
 761                                     "generation.");
 762         TS_RESP_CTX_add_failure_info(ctx, TS_INFO_ADD_INFO_NOT_AVAILABLE);
 763     } else {
 764         save_ts_serial(serial_file, serial);
 765     }
 766
 767     return serial;
 768 }
 769
 770 static ASN1_INTEGER *next_serial(const char *serialfile)
 771 {
 772     int ret = 0;
 773     BIO *in = NULL;
 774     ASN1_INTEGER *serial = NULL;
 775     BIGNUM *bn = NULL;
 776
 777     if ((serial = ASN1_INTEGER_new()) == NULL)
 778         goto err;
 779
 780     if ((in = BIO_new_file(serialfile, "r")) == NULL) {
 781         ERR_clear_error();
 782         BIO_printf(bio_err, "Warning: could not open file %s for "
 783                    "reading, using serial number: 1\n", serialfile);
 784         if (!ASN1_INTEGER_set(serial, 1))
 785             goto err;
 786     } else {
 787         char buf[1024];
 788         if (!a2i_ASN1_INTEGER(in, serial, buf, sizeof(buf))) {
 789             BIO_printf(bio_err, "unable to load number from %s\n",
 790                        serialfile);
 791             goto err;
 792         }
 793         if ((bn = ASN1_INTEGER_to_BN(serial, NULL)) == NULL)
 794             goto err;
 795         ASN1_INTEGER_free(serial);
 796         serial = NULL;
 797         if (!BN_add_word(bn, 1))
 798             goto err;
 799         if ((serial = BN_to_ASN1_INTEGER(bn, NULL)) == NULL)
 800             goto err;
 801     }
 802     ret = 1;
 803
 804  err:
 805     if (!ret) {
 806         ASN1_INTEGER_free(serial);
 807         serial = NULL;
 808     }
 809     BIO_free_all(in);
 810     BN_free(bn);
 811     return serial;
 812 }
 813
 814 static int save_ts_serial(const char *serialfile, ASN1_INTEGER *serial)
 815 {
 816     int ret = 0;
 817     BIO *out = NULL;
 818
 819     if ((out = BIO_new_file(serialfile, "w")) == NULL)
 820         goto err;
 821     if (i2a_ASN1_INTEGER(out, serial) <= 0)
 822         goto err;
 823     if (BIO_puts(out, "\n") <= 0)
 824         goto err;
 825     ret = 1;
 826  err:
 827     if (!ret)
 828         BIO_printf(bio_err, "could not save serial number to %s\n",
 829                    serialfile);
 830     BIO_free_all(out);
 831     return ret;
 832 }
 833
 834
 835 /*
 836  * Verify-related method definitions.
 837  */
 838
 839 static int verify_command(const char *data, const char *digest, const char *queryfile,
 840                           const char *in, int token_in,
 841                           const char *CApath, const char *CAfile,
 842                           const char *CAstore, const char *untrusted,
 843                           X509_VERIFY_PARAM *vpm)
 844 {
 845     BIO *in_bio = NULL;
 846     PKCS7 *token = NULL;
 847     TS_RESP *response = NULL;
 848     TS_VERIFY_CTX *verify_ctx = NULL;
 849     int ret = 0;
 850
 851     if ((in_bio = BIO_new_file(in, "rb")) == NULL)
 852         goto end;
 853     if (token_in) {
 854         if ((token = d2i_PKCS7_bio(in_bio, NULL)) == NULL)
 855             goto end;
 856     } else {
 857         if ((response = d2i_TS_RESP_bio(in_bio, NULL)) == NULL)
 858             goto end;
 859     }
 860
 861     if ((verify_ctx = create_verify_ctx(data, digest, queryfile,
 862                                         CApath, CAfile, CAstore, untrusted,
 863                                         vpm)) == NULL)
 864         goto end;
 865
 866     ret = token_in
 867         ? TS_RESP_verify_token(verify_ctx, token)
 868         : TS_RESP_verify_response(verify_ctx, response);
 869
 870  end:
 871     printf("Verification: ");
 872     if (ret)
 873         printf("OK\n");
 874     else {
 875         printf("FAILED\n");
 876         ERR_print_errors(bio_err);
 877     }
 878
 879     BIO_free_all(in_bio);
 880     PKCS7_free(token);
 881     TS_RESP_free(response);
 882     TS_VERIFY_CTX_free(verify_ctx);
 883     return ret;
 884 }
 885
 886 static TS_VERIFY_CTX *create_verify_ctx(const char *data, const char *digest,
 887                                         const char *queryfile,
 888                                         const char *CApath, const char *CAfile,
 889                                         const char *CAstore,
 890                                         const char *untrusted,
 891                                         X509_VERIFY_PARAM *vpm)
 892 {
 893     TS_VERIFY_CTX *ctx = NULL;
 894     BIO *input = NULL;
 895     TS_REQ *request = NULL;
 896     int ret = 0;
 897     int f = 0;
 898
 899     if (data != NULL || digest != NULL) {
 900         if ((ctx = TS_VERIFY_CTX_new()) == NULL)
 901             goto err;
 902         f = TS_VFY_VERSION | TS_VFY_SIGNER;
 903         if (data != NULL) {
 904             BIO *out = NULL;
 905
 906             f |= TS_VFY_DATA;
 907             if ((out = BIO_new_file(data, "rb")) == NULL)
 908                 goto err;
 909             if (TS_VERIFY_CTX_set_data(ctx, out) == NULL) {
 910                 BIO_free_all(out);
 911                 goto err;
 912             }
 913         } else if (digest != NULL) {
 914             long imprint_len;
 915             unsigned char *hexstr = OPENSSL_hexstr2buf(digest, &imprint_len);
 916             f |= TS_VFY_IMPRINT;
 917             if (TS_VERIFY_CTX_set_imprint(ctx, hexstr, imprint_len) == NULL) {
 918                 BIO_printf(bio_err, "invalid digest string\n");
 919                 goto err;
 920             }
 921         }
 922
 923     } else if (queryfile != NULL) {
 924         if ((input = BIO_new_file(queryfile, "rb")) == NULL)
 925             goto err;
 926         if ((request = d2i_TS_REQ_bio(input, NULL)) == NULL)
 927             goto err;
 928         if ((ctx = TS_REQ_to_TS_VERIFY_CTX(request, NULL)) == NULL)
 929             goto err;
 930     } else {
 931         return NULL;
 932     }
 933
 934     /* Add the signature verification flag and arguments. */
 935     TS_VERIFY_CTX_add_flags(ctx, f | TS_VFY_SIGNATURE);
 936
 937     /* Initialising the X509_STORE object. */
 938     if (TS_VERIFY_CTX_set_store(ctx,
 939                                 create_cert_store(CApath, CAfile, CAstore, vpm))
 940             == NULL)
 941         goto err;
 942
 943     /* Loading untrusted certificates. */
 944     if (untrusted
 945         && TS_VERIFY_CTX_set_certs(ctx, TS_CONF_load_certs(untrusted)) == NULL)
 946         goto err;
 947     ret = 1;
 948
 949  err:
 950     if (!ret) {
 951         TS_VERIFY_CTX_free(ctx);
 952         ctx = NULL;
 953     }
 954     BIO_free_all(input);
 955     TS_REQ_free(request);
 956     return ctx;
 957 }
 958
 959 static X509_STORE *create_cert_store(const char *CApath, const char *CAfile,
 960                                      const char *CAstore, X509_VERIFY_PARAM *vpm)
 961 {
 962     X509_STORE *cert_ctx = NULL;
 963     X509_LOOKUP *lookup = NULL;
 964     OSSL_LIB_CTX *libctx = app_get0_libctx();
 965     const char *propq = app_get0_propq();
 966
 967     cert_ctx = X509_STORE_new();
 968     X509_STORE_set_verify_cb(cert_ctx, verify_cb);
 969     if (CApath != NULL) {
 970         lookup = X509_STORE_add_lookup(cert_ctx, X509_LOOKUP_hash_dir());
 971         if (lookup == NULL) {
 972             BIO_printf(bio_err, "memory allocation failure\n");
 973             goto err;
 974         }
 975         if (!X509_LOOKUP_add_dir(lookup, CApath, X509_FILETYPE_PEM)) {
 976             BIO_printf(bio_err, "Error loading directory %s\n", CApath);
 977             goto err;
 978         }
 979     }
 980
 981     if (CAfile != NULL) {
 982         lookup = X509_STORE_add_lookup(cert_ctx, X509_LOOKUP_file());
 983         if (lookup == NULL) {
 984             BIO_printf(bio_err, "memory allocation failure\n");
 985             goto err;
 986         }
 987         if (!X509_LOOKUP_load_file_ex(lookup, CAfile, X509_FILETYPE_PEM, libctx,
 988                                       propq)) {
 989             BIO_printf(bio_err, "Error loading file %s\n", CAfile);
 990             goto err;
 991         }
 992     }
 993
 994     if (CAstore != NULL) {
 995         lookup = X509_STORE_add_lookup(cert_ctx, X509_LOOKUP_store());
 996         if (lookup == NULL) {
 997             BIO_printf(bio_err, "memory allocation failure\n");
 998             goto err;
 999         }
1000         if (!X509_LOOKUP_load_store_ex(lookup, CAstore, libctx, propq)) {
1001             BIO_printf(bio_err, "Error loading store URI %s\n", CAstore);
1002             goto err;
1003         }
1004     }
1005
1006     if (vpm != NULL)
1007         X509_STORE_set1_param(cert_ctx, vpm);
1008
1009     return cert_ctx;
1010
1011  err:
1012     X509_STORE_free(cert_ctx);
1013     return NULL;
1014 }
1015
1016 static int verify_cb(int ok, X509_STORE_CTX *ctx)
1017 {
1018     return ok;
1019 }