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     if (mode == OPT_REPLY && passin &&
 296         !app_passwd(passin, NULL, &password, NULL)) {
 297         BIO_printf(bio_err, "Error getting password.\n");
 298         goto end;
 299     }
 300
 301     if ((conf = load_config_file(configfile)) == NULL)
 302         goto end;
 303     if (configfile != default_config_file && !app_load_modules(conf))
 304         goto end;
 305
 306     /* Check parameter consistency and execute the appropriate function. */
 307     if (mode == OPT_QUERY) {
 308         if (vpmtouched)
 309             goto opthelp;
 310         if ((data != NULL) && (digest != NULL))
 311             goto opthelp;
 312         ret = !query_command(data, digest, md, policy, no_nonce, cert,
 313                              in, out, text);
 314     } else if (mode == OPT_REPLY) {
 315         if (vpmtouched)
 316             goto opthelp;
 317         if ((in != NULL) && (queryfile != NULL))
 318             goto opthelp;
 319         if (in == NULL) {
 320             if ((conf == NULL) || (token_in != 0))
 321                 goto opthelp;
 322         }
 323         ret = !reply_command(conf, section, engine, queryfile,
 324                              password, inkey, md, signer, chain, policy,
 325                              in, token_in, out, token_out, text);
 326
 327     } else if (mode == OPT_VERIFY) {
 328         if ((in == NULL) || !EXACTLY_ONE(queryfile, data, digest))
 329             goto opthelp;
 330         ret = !verify_command(data, digest, queryfile, in, token_in,
 331                               CApath, CAfile, CAstore, untrusted,
 332                               vpmtouched ? vpm : NULL);
 333     } else {
 334         goto opthelp;
 335     }
 336
 337  end:
 338     X509_VERIFY_PARAM_free(vpm);
 339     NCONF_free(conf);
 340     OPENSSL_free(password);
 341     return ret;
 342 }
 343
 344 /*
 345  * Configuration file-related function definitions.
 346  */
 347
 348 static ASN1_OBJECT *txt2obj(const char *oid)
 349 {
 350     ASN1_OBJECT *oid_obj = NULL;
 351
 352     if ((oid_obj = OBJ_txt2obj(oid, 0)) == NULL)
 353         BIO_printf(bio_err, "cannot convert %s to OID\n", oid);
 354
 355     return oid_obj;
 356 }
 357
 358 static CONF *load_config_file(const char *configfile)
 359 {
 360     CONF *conf = app_load_config(configfile);
 361
 362     if (conf != NULL) {
 363         const char *p;
 364
 365         BIO_printf(bio_err, "Using configuration from %s\n", configfile);
 366         p = NCONF_get_string(conf, NULL, ENV_OID_FILE);
 367         if (p != NULL) {
 368             BIO *oid_bio = BIO_new_file(p, "r");
 369             if (!oid_bio)
 370                 ERR_print_errors(bio_err);
 371             else {
 372                 OBJ_create_objects(oid_bio);
 373                 BIO_free_all(oid_bio);
 374             }
 375         } else
 376             ERR_clear_error();
 377         if (!add_oid_section(conf))
 378             ERR_print_errors(bio_err);
 379     }
 380     return conf;
 381 }
 382
 383 /*
 384  * Query-related method definitions.
 385  */
 386 static int query_command(const char *data, const char *digest, const EVP_MD *md,
 387                          const char *policy, int no_nonce,
 388                          int cert, const char *in, const char *out, int text)
 389 {
 390     int ret = 0;
 391     TS_REQ *query = NULL;
 392     BIO *in_bio = NULL;
 393     BIO *data_bio = NULL;
 394     BIO *out_bio = NULL;
 395
 396     /* Build query object. */
 397     if (in != NULL) {
 398         if ((in_bio = bio_open_default(in, 'r', FORMAT_ASN1)) == NULL)
 399             goto end;
 400         query = d2i_TS_REQ_bio(in_bio, NULL);
 401     } else {
 402         if (digest == NULL
 403             && (data_bio = bio_open_default(data, 'r', FORMAT_ASN1)) == NULL)
 404             goto end;
 405         query = create_query(data_bio, digest, md, policy, no_nonce, cert);
 406     }
 407     if (query == NULL)
 408         goto end;
 409
 410     if (text) {
 411         if ((out_bio = bio_open_default(out, 'w', FORMAT_TEXT)) == NULL)
 412             goto end;
 413         if (!TS_REQ_print_bio(out_bio, query))
 414             goto end;
 415     } else {
 416         if ((out_bio = bio_open_default(out, 'w', FORMAT_ASN1)) == NULL)
 417             goto end;
 418         if (!i2d_TS_REQ_bio(out_bio, query))
 419             goto end;
 420     }
 421
 422     ret = 1;
 423
 424  end:
 425     ERR_print_errors(bio_err);
 426     BIO_free_all(in_bio);
 427     BIO_free_all(data_bio);
 428     BIO_free_all(out_bio);
 429     TS_REQ_free(query);
 430     return ret;
 431 }
 432
 433 static TS_REQ *create_query(BIO *data_bio, const char *digest, const EVP_MD *md,
 434                             const char *policy, int no_nonce, int cert)
 435 {
 436     int ret = 0;
 437     TS_REQ *ts_req = NULL;
 438     int len;
 439     TS_MSG_IMPRINT *msg_imprint = NULL;
 440     X509_ALGOR *algo = NULL;
 441     unsigned char *data = NULL;
 442     ASN1_OBJECT *policy_obj = NULL;
 443     ASN1_INTEGER *nonce_asn1 = NULL;
 444
 445     if (md == NULL && (md = EVP_get_digestbyname("sha256")) == NULL)
 446         goto err;
 447     if ((ts_req = TS_REQ_new()) == NULL)
 448         goto err;
 449     if (!TS_REQ_set_version(ts_req, 1))
 450         goto err;
 451     if ((msg_imprint = TS_MSG_IMPRINT_new()) == NULL)
 452         goto err;
 453     if ((algo = X509_ALGOR_new()) == NULL)
 454         goto err;
 455     if ((algo->algorithm = OBJ_nid2obj(EVP_MD_type(md))) == NULL)
 456         goto err;
 457     if ((algo->parameter = ASN1_TYPE_new()) == NULL)
 458         goto err;
 459     algo->parameter->type = V_ASN1_NULL;
 460     if (!TS_MSG_IMPRINT_set_algo(msg_imprint, algo))
 461         goto err;
 462     if ((len = create_digest(data_bio, digest, md, &data)) == 0)
 463         goto err;
 464     if (!TS_MSG_IMPRINT_set_msg(msg_imprint, data, len))
 465         goto err;
 466     if (!TS_REQ_set_msg_imprint(ts_req, msg_imprint))
 467         goto err;
 468     if (policy && (policy_obj = txt2obj(policy)) == NULL)
 469         goto err;
 470     if (policy_obj && !TS_REQ_set_policy_id(ts_req, policy_obj))
 471         goto err;
 472
 473     /* Setting nonce if requested. */
 474     if (!no_nonce && (nonce_asn1 = create_nonce(NONCE_LENGTH)) == NULL)
 475         goto err;
 476     if (nonce_asn1 && !TS_REQ_set_nonce(ts_req, nonce_asn1))
 477         goto err;
 478     if (!TS_REQ_set_cert_req(ts_req, cert))
 479         goto err;
 480
 481     ret = 1;
 482  err:
 483     if (!ret) {
 484         TS_REQ_free(ts_req);
 485         ts_req = NULL;
 486         BIO_printf(bio_err, "could not create query\n");
 487         ERR_print_errors(bio_err);
 488     }
 489     TS_MSG_IMPRINT_free(msg_imprint);
 490     X509_ALGOR_free(algo);
 491     OPENSSL_free(data);
 492     ASN1_OBJECT_free(policy_obj);
 493     ASN1_INTEGER_free(nonce_asn1);
 494     return ts_req;
 495 }
 496
 497 static int create_digest(BIO *input, const char *digest, const EVP_MD *md,
 498                          unsigned char **md_value)
 499 {
 500     int md_value_len;
 501     int rv = 0;
 502     EVP_MD_CTX *md_ctx = NULL;
 503
 504     md_value_len = EVP_MD_size(md);
 505     if (md_value_len < 0)
 506         return 0;
 507
 508     if (input != NULL) {
 509         unsigned char buffer[4096];
 510         int length;
 511
 512         md_ctx = EVP_MD_CTX_new();
 513         if (md_ctx == NULL)
 514             return 0;
 515         *md_value = app_malloc(md_value_len, "digest buffer");
 516         if (!EVP_DigestInit(md_ctx, md))
 517             goto err;
 518         while ((length = BIO_read(input, buffer, sizeof(buffer))) > 0) {
 519             if (!EVP_DigestUpdate(md_ctx, buffer, length))
 520                 goto err;
 521         }
 522         if (!EVP_DigestFinal(md_ctx, *md_value, NULL))
 523             goto err;
 524         md_value_len = EVP_MD_size(md);
 525     } else {
 526         long digest_len;
 527
 528         *md_value = OPENSSL_hexstr2buf(digest, &digest_len);
 529         if (*md_value == NULL || md_value_len != digest_len) {
 530             OPENSSL_free(*md_value);
 531             *md_value = NULL;
 532             BIO_printf(bio_err, "bad digest, %d bytes "
 533                        "must be specified\n", md_value_len);
 534             return 0;
 535         }
 536     }
 537     rv = md_value_len;
 538  err:
 539     EVP_MD_CTX_free(md_ctx);
 540     return rv;
 541 }
 542
 543 static ASN1_INTEGER *create_nonce(int bits)
 544 {
 545     unsigned char buf[20];
 546     ASN1_INTEGER *nonce = NULL;
 547     int len = (bits - 1) / 8 + 1;
 548     int i;
 549
 550     if (len > (int)sizeof(buf))
 551         goto err;
 552     if (RAND_bytes(buf, len) <= 0)
 553         goto err;
 554
 555     /* Find the first non-zero byte and creating ASN1_INTEGER object. */
 556     for (i = 0; i < len && !buf[i]; ++i)
 557         continue;
 558     if ((nonce = ASN1_INTEGER_new()) == NULL)
 559         goto err;
 560     OPENSSL_free(nonce->data);
 561     nonce->length = len - i;
 562     nonce->data = app_malloc(nonce->length + 1, "nonce buffer");
 563     memcpy(nonce->data, buf + i, nonce->length);
 564     return nonce;
 565
 566  err:
 567     BIO_printf(bio_err, "could not create nonce\n");
 568     ASN1_INTEGER_free(nonce);
 569     return NULL;
 570 }
 571
 572 /*
 573  * Reply-related method definitions.
 574  */
 575
 576 static int reply_command(CONF *conf, const char *section, const char *engine,
 577                          const char *queryfile, const char *passin, const char *inkey,
 578                          const EVP_MD *md, const char *signer, const char *chain,
 579                          const char *policy, const char *in, int token_in,
 580                          const char *out, int token_out, int text)
 581 {
 582     int ret = 0;
 583     TS_RESP *response = NULL;
 584     BIO *in_bio = NULL;
 585     BIO *query_bio = NULL;
 586     BIO *inkey_bio = NULL;
 587     BIO *signer_bio = NULL;
 588     BIO *out_bio = NULL;
 589
 590     if (in != NULL) {
 591         if ((in_bio = BIO_new_file(in, "rb")) == NULL)
 592             goto end;
 593         if (token_in) {
 594             response = read_PKCS7(in_bio);
 595         } else {
 596             response = d2i_TS_RESP_bio(in_bio, NULL);
 597         }
 598     } else {
 599         response = create_response(conf, section, engine, queryfile,
 600                                    passin, inkey, md, signer, chain, policy);
 601         if (response != NULL)
 602             BIO_printf(bio_err, "Response has been generated.\n");
 603         else
 604             BIO_printf(bio_err, "Response is not generated.\n");
 605     }
 606     if (response == NULL)
 607         goto end;
 608
 609     /* Write response. */
 610     if (text) {
 611         if ((out_bio = bio_open_default(out, 'w', FORMAT_TEXT)) == NULL)
 612         goto end;
 613         if (token_out) {
 614             TS_TST_INFO *tst_info = TS_RESP_get_tst_info(response);
 615             if (!TS_TST_INFO_print_bio(out_bio, tst_info))
 616                 goto end;
 617         } else {
 618             if (!TS_RESP_print_bio(out_bio, response))
 619                 goto end;
 620         }
 621     } else {
 622         if ((out_bio = bio_open_default(out, 'w', FORMAT_ASN1)) == NULL)
 623             goto end;
 624         if (token_out) {
 625             PKCS7 *token = TS_RESP_get_token(response);
 626             if (!i2d_PKCS7_bio(out_bio, token))
 627                 goto end;
 628         } else {
 629             if (!i2d_TS_RESP_bio(out_bio, response))
 630                 goto end;
 631         }
 632     }
 633
 634     ret = 1;
 635
 636  end:
 637     ERR_print_errors(bio_err);
 638     BIO_free_all(in_bio);
 639     BIO_free_all(query_bio);
 640     BIO_free_all(inkey_bio);
 641     BIO_free_all(signer_bio);
 642     BIO_free_all(out_bio);
 643     TS_RESP_free(response);
 644     return ret;
 645 }
 646
 647 /* Reads a PKCS7 token and adds default 'granted' status info to it. */
 648 static TS_RESP *read_PKCS7(BIO *in_bio)
 649 {
 650     int ret = 0;
 651     PKCS7 *token = NULL;
 652     TS_TST_INFO *tst_info = NULL;
 653     TS_RESP *resp = NULL;
 654     TS_STATUS_INFO *si = NULL;
 655
 656     if ((token = d2i_PKCS7_bio(in_bio, NULL)) == NULL)
 657         goto end;
 658     if ((tst_info = PKCS7_to_TS_TST_INFO(token)) == NULL)
 659         goto end;
 660     if ((resp = TS_RESP_new()) == NULL)
 661         goto end;
 662     if ((si = TS_STATUS_INFO_new()) == NULL)
 663         goto end;
 664     if (!TS_STATUS_INFO_set_status(si, TS_STATUS_GRANTED))
 665         goto end;
 666     if (!TS_RESP_set_status_info(resp, si))
 667         goto end;
 668     TS_RESP_set_tst_info(resp, token, tst_info);
 669     token = NULL;               /* Ownership is lost. */
 670     tst_info = NULL;            /* Ownership is lost. */
 671     ret = 1;
 672
 673  end:
 674     PKCS7_free(token);
 675     TS_TST_INFO_free(tst_info);
 676     if (!ret) {
 677         TS_RESP_free(resp);
 678         resp = NULL;
 679     }
 680     TS_STATUS_INFO_free(si);
 681     return resp;
 682 }
 683
 684 static TS_RESP *create_response(CONF *conf, const char *section, const char *engine,
 685                                 const char *queryfile, const char *passin,
 686                                 const char *inkey, const EVP_MD *md, const char *signer,
 687                                 const char *chain, const char *policy)
 688 {
 689     int ret = 0;
 690     TS_RESP *response = NULL;
 691     BIO *query_bio = NULL;
 692     TS_RESP_CTX *resp_ctx = NULL;
 693
 694     if ((query_bio = BIO_new_file(queryfile, "rb")) == NULL)
 695         goto end;
 696     if ((section = TS_CONF_get_tsa_section(conf, section)) == NULL)
 697         goto end;
 698     if ((resp_ctx = TS_RESP_CTX_new()) == NULL)
 699         goto end;
 700     if (!TS_CONF_set_serial(conf, section, serial_cb, resp_ctx))
 701         goto end;
 702 #ifndef OPENSSL_NO_ENGINE
 703     if (!TS_CONF_set_crypto_device(conf, section, engine))
 704         goto end;
 705 #endif
 706     if (!TS_CONF_set_signer_cert(conf, section, signer, resp_ctx))
 707         goto end;
 708     if (!TS_CONF_set_certs(conf, section, chain, resp_ctx))
 709         goto end;
 710     if (!TS_CONF_set_signer_key(conf, section, inkey, passin, resp_ctx))
 711         goto end;
 712
 713     if (md) {
 714         if (!TS_RESP_CTX_set_signer_digest(resp_ctx, md))
 715             goto end;
 716     } else if (!TS_CONF_set_signer_digest(conf, section, NULL, resp_ctx)) {
 717             goto end;
 718     }
 719
 720     if (!TS_CONF_set_ess_cert_id_digest(conf, section, resp_ctx))
 721         goto end;
 722     if (!TS_CONF_set_def_policy(conf, section, policy, resp_ctx))
 723         goto end;
 724     if (!TS_CONF_set_policies(conf, section, resp_ctx))
 725         goto end;
 726     if (!TS_CONF_set_digests(conf, section, resp_ctx))
 727         goto end;
 728     if (!TS_CONF_set_accuracy(conf, section, resp_ctx))
 729         goto end;
 730     if (!TS_CONF_set_clock_precision_digits(conf, section, resp_ctx))
 731         goto end;
 732     if (!TS_CONF_set_ordering(conf, section, resp_ctx))
 733         goto end;
 734     if (!TS_CONF_set_tsa_name(conf, section, resp_ctx))
 735         goto end;
 736     if (!TS_CONF_set_ess_cert_id_chain(conf, section, resp_ctx))
 737         goto end;
 738     if ((response = TS_RESP_create_response(resp_ctx, query_bio)) == NULL)
 739         goto end;
 740     ret = 1;
 741
 742  end:
 743     if (!ret) {
 744         TS_RESP_free(response);
 745         response = NULL;
 746     }
 747     TS_RESP_CTX_free(resp_ctx);
 748     BIO_free_all(query_bio);
 749     return response;
 750 }
 751
 752 static ASN1_INTEGER *serial_cb(TS_RESP_CTX *ctx, void *data)
 753 {
 754     const char *serial_file = (const char *)data;
 755     ASN1_INTEGER *serial = next_serial(serial_file);
 756
 757     if (serial == NULL) {
 758         TS_RESP_CTX_set_status_info(ctx, TS_STATUS_REJECTION,
 759                                     "Error during serial number "
 760                                     "generation.");
 761         TS_RESP_CTX_add_failure_info(ctx, TS_INFO_ADD_INFO_NOT_AVAILABLE);
 762     } else {
 763         save_ts_serial(serial_file, serial);
 764     }
 765
 766     return serial;
 767 }
 768
 769 static ASN1_INTEGER *next_serial(const char *serialfile)
 770 {
 771     int ret = 0;
 772     BIO *in = NULL;
 773     ASN1_INTEGER *serial = NULL;
 774     BIGNUM *bn = NULL;
 775
 776     if ((serial = ASN1_INTEGER_new()) == NULL)
 777         goto err;
 778
 779     if ((in = BIO_new_file(serialfile, "r")) == NULL) {
 780         ERR_clear_error();
 781         BIO_printf(bio_err, "Warning: could not open file %s for "
 782                    "reading, using serial number: 1\n", serialfile);
 783         if (!ASN1_INTEGER_set(serial, 1))
 784             goto err;
 785     } else {
 786         char buf[1024];
 787         if (!a2i_ASN1_INTEGER(in, serial, buf, sizeof(buf))) {
 788             BIO_printf(bio_err, "unable to load number from %s\n",
 789                        serialfile);
 790             goto err;
 791         }
 792         if ((bn = ASN1_INTEGER_to_BN(serial, NULL)) == NULL)
 793             goto err;
 794         ASN1_INTEGER_free(serial);
 795         serial = NULL;
 796         if (!BN_add_word(bn, 1))
 797             goto err;
 798         if ((serial = BN_to_ASN1_INTEGER(bn, NULL)) == NULL)
 799             goto err;
 800     }
 801     ret = 1;
 802
 803  err:
 804     if (!ret) {
 805         ASN1_INTEGER_free(serial);
 806         serial = NULL;
 807     }
 808     BIO_free_all(in);
 809     BN_free(bn);
 810     return serial;
 811 }
 812
 813 static int save_ts_serial(const char *serialfile, ASN1_INTEGER *serial)
 814 {
 815     int ret = 0;
 816     BIO *out = NULL;
 817
 818     if ((out = BIO_new_file(serialfile, "w")) == NULL)
 819         goto err;
 820     if (i2a_ASN1_INTEGER(out, serial) <= 0)
 821         goto err;
 822     if (BIO_puts(out, "\n") <= 0)
 823         goto err;
 824     ret = 1;
 825  err:
 826     if (!ret)
 827         BIO_printf(bio_err, "could not save serial number to %s\n",
 828                    serialfile);
 829     BIO_free_all(out);
 830     return ret;
 831 }
 832
 833
 834 /*
 835  * Verify-related method definitions.
 836  */
 837
 838 static int verify_command(const char *data, const char *digest, const char *queryfile,
 839                           const char *in, int token_in,
 840                           const char *CApath, const char *CAfile,
 841                           const char *CAstore, const char *untrusted,
 842                           X509_VERIFY_PARAM *vpm)
 843 {
 844     BIO *in_bio = NULL;
 845     PKCS7 *token = NULL;
 846     TS_RESP *response = NULL;
 847     TS_VERIFY_CTX *verify_ctx = NULL;
 848     int ret = 0;
 849
 850     if ((in_bio = BIO_new_file(in, "rb")) == NULL)
 851         goto end;
 852     if (token_in) {
 853         if ((token = d2i_PKCS7_bio(in_bio, NULL)) == NULL)
 854             goto end;
 855     } else {
 856         if ((response = d2i_TS_RESP_bio(in_bio, NULL)) == NULL)
 857             goto end;
 858     }
 859
 860     if ((verify_ctx = create_verify_ctx(data, digest, queryfile,
 861                                         CApath, CAfile, CAstore, untrusted,
 862                                         vpm)) == NULL)
 863         goto end;
 864
 865     ret = token_in
 866         ? TS_RESP_verify_token(verify_ctx, token)
 867         : TS_RESP_verify_response(verify_ctx, response);
 868
 869  end:
 870     printf("Verification: ");
 871     if (ret)
 872         printf("OK\n");
 873     else {
 874         printf("FAILED\n");
 875         ERR_print_errors(bio_err);
 876     }
 877
 878     BIO_free_all(in_bio);
 879     PKCS7_free(token);
 880     TS_RESP_free(response);
 881     TS_VERIFY_CTX_free(verify_ctx);
 882     return ret;
 883 }
 884
 885 static TS_VERIFY_CTX *create_verify_ctx(const char *data, const char *digest,
 886                                         const char *queryfile,
 887                                         const char *CApath, const char *CAfile,
 888                                         const char *CAstore,
 889                                         const char *untrusted,
 890                                         X509_VERIFY_PARAM *vpm)
 891 {
 892     TS_VERIFY_CTX *ctx = NULL;
 893     BIO *input = NULL;
 894     TS_REQ *request = NULL;
 895     int ret = 0;
 896     int f = 0;
 897
 898     if (data != NULL || digest != NULL) {
 899         if ((ctx = TS_VERIFY_CTX_new()) == NULL)
 900             goto err;
 901         f = TS_VFY_VERSION | TS_VFY_SIGNER;
 902         if (data != NULL) {
 903             BIO *out = NULL;
 904
 905             f |= TS_VFY_DATA;
 906             if ((out = BIO_new_file(data, "rb")) == NULL)
 907                 goto err;
 908             if (TS_VERIFY_CTX_set_data(ctx, out) == NULL) {
 909                 BIO_free_all(out);
 910                 goto err;
 911             }
 912         } else if (digest != NULL) {
 913             long imprint_len;
 914             unsigned char *hexstr = OPENSSL_hexstr2buf(digest, &imprint_len);
 915             f |= TS_VFY_IMPRINT;
 916             if (TS_VERIFY_CTX_set_imprint(ctx, hexstr, imprint_len) == NULL) {
 917                 BIO_printf(bio_err, "invalid digest string\n");
 918                 goto err;
 919             }
 920         }
 921
 922     } else if (queryfile != NULL) {
 923         if ((input = BIO_new_file(queryfile, "rb")) == NULL)
 924             goto err;
 925         if ((request = d2i_TS_REQ_bio(input, NULL)) == NULL)
 926             goto err;
 927         if ((ctx = TS_REQ_to_TS_VERIFY_CTX(request, NULL)) == NULL)
 928             goto err;
 929     } else {
 930         return NULL;
 931     }
 932
 933     /* Add the signature verification flag and arguments. */
 934     TS_VERIFY_CTX_add_flags(ctx, f | TS_VFY_SIGNATURE);
 935
 936     /* Initialising the X509_STORE object. */
 937     if (TS_VERIFY_CTX_set_store(ctx,
 938                                 create_cert_store(CApath, CAfile, CAstore, vpm))
 939             == NULL)
 940         goto err;
 941
 942     /* Loading untrusted certificates. */
 943     if (untrusted
 944         && TS_VERIFY_CTX_set_certs(ctx, TS_CONF_load_certs(untrusted)) == NULL)
 945         goto err;
 946     ret = 1;
 947
 948  err:
 949     if (!ret) {
 950         TS_VERIFY_CTX_free(ctx);
 951         ctx = NULL;
 952     }
 953     BIO_free_all(input);
 954     TS_REQ_free(request);
 955     return ctx;
 956 }
 957
 958 static X509_STORE *create_cert_store(const char *CApath, const char *CAfile,
 959                                      const char *CAstore, X509_VERIFY_PARAM *vpm)
 960 {
 961     X509_STORE *cert_ctx = NULL;
 962     X509_LOOKUP *lookup = NULL;
 963     OSSL_LIB_CTX *libctx = app_get0_libctx();
 964     const char *propq = app_get0_propq();
 965
 966     cert_ctx = X509_STORE_new();
 967     X509_STORE_set_verify_cb(cert_ctx, verify_cb);
 968     if (CApath != NULL) {
 969         lookup = X509_STORE_add_lookup(cert_ctx, X509_LOOKUP_hash_dir());
 970         if (lookup == NULL) {
 971             BIO_printf(bio_err, "memory allocation failure\n");
 972             goto err;
 973         }
 974         if (!X509_LOOKUP_add_dir(lookup, CApath, X509_FILETYPE_PEM)) {
 975             BIO_printf(bio_err, "Error loading directory %s\n", CApath);
 976             goto err;
 977         }
 978     }
 979
 980     if (CAfile != NULL) {
 981         lookup = X509_STORE_add_lookup(cert_ctx, X509_LOOKUP_file());
 982         if (lookup == NULL) {
 983             BIO_printf(bio_err, "memory allocation failure\n");
 984             goto err;
 985         }
 986         if (!X509_LOOKUP_load_file_ex(lookup, CAfile, X509_FILETYPE_PEM, libctx,
 987                                       propq)) {
 988             BIO_printf(bio_err, "Error loading file %s\n", CAfile);
 989             goto err;
 990         }
 991     }
 992
 993     if (CAstore != NULL) {
 994         lookup = X509_STORE_add_lookup(cert_ctx, X509_LOOKUP_store());
 995         if (lookup == NULL) {
 996             BIO_printf(bio_err, "memory allocation failure\n");
 997             goto err;
 998         }
 999         if (!X509_LOOKUP_load_store_ex(lookup, CAstore, libctx, propq)) {
1000             BIO_printf(bio_err, "Error loading store URI %s\n", CAstore);
1001             goto err;
1002         }
1003     }
1004
1005     if (vpm != NULL)
1006         X509_STORE_set1_param(cert_ctx, vpm);
1007
1008     return cert_ctx;
1009
1010  err:
1011     X509_STORE_free(cert_ctx);
1012     return NULL;
1013 }
1014
1015 static int verify_cb(int ok, X509_STORE_CTX *ctx)
1016 {
1017     return ok;
1018 }