test/ct_test.c

   1 /*
   2  * Tests the Certificate Transparency public API.
   3  *
   4  * Author:      Rob Percival (robpercival@google.com)
   5  *
   6  * ====================================================================
   7  * Copyright (c) 2016 The OpenSSL Project.    All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  *
  13  * 1. Redistributions of source code must retain the above copyright
  14  *        notice, this list of conditions and the following disclaimer.
  15  *
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *        notice, this list of conditions and the following disclaimer in
  18  *        the documentation and/or other materials provided with the
  19  *        distribution.
  20  *
  21  * 3. All advertising materials mentioning features or use of this
  22  *        software must display the following acknowledgment:
  23  *        "This product includes software developed by the OpenSSL Project
  24  *        for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  25  *
  26  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  27  *        endorse or promote products derived from this software without
  28  *        prior written permission. For written permission, please contact
  29  *        licensing@OpenSSL.org.
  30  *
  31  * 5. Products derived from this software may not be called "OpenSSL"
  32  *        nor may "OpenSSL" appear in their names without prior written
  33  *        permission of the OpenSSL Project.
  34  *
  35  * 6. Redistributions of any form whatsoever must retain the following
  36  *        acknowledgment:
  37  *        "This product includes software developed by the OpenSSL Project
  38  *        for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  39  *
  40  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT AS IS'' AND ANY
  41  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  42  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  43  * PURPOSE ARE DISCLAIMED.    IN NO EVENT SHALL THE OpenSSL PROJECT OR
  44  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  45  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  46  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  47  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  49  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  50  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  51  * OF THE POSSIBILITY OF SUCH DAMAGE.
  52  * ====================================================================
  53  */
  54
  55 #include <ctype.h>
  56 #include <stdio.h>
  57 #include <stdlib.h>
  58 #include <string.h>
  59
  60 #include <openssl/ct.h>
  61 #include <openssl/err.h>
  62 #include <openssl/pem.h>
  63 #include <openssl/x509.h>
  64 #include <openssl/x509v3.h>
  65 #include "testutil.h"
  66
  67 #ifndef OPENSSL_NO_CT
  68
  69 /* Used when declaring buffers to read text files into */
  70 #define CT_TEST_MAX_FILE_SIZE 8096
  71
  72 static char *certs_dir = NULL;
  73 static char *ct_dir = NULL;
  74
  75 typedef struct ct_test_fixture {
  76     const char *test_case_name;
  77     /* The CT log store to use during tests */
  78     CTLOG_STORE* ctlog_store;
  79     /* Set the following to test handling of SCTs in X509 certificates */
  80     const char *certs_dir;
  81     char *certificate_file;
  82     char *issuer_file;
  83     int expected_sct_count;
  84     /* Set the following to test handling of SCTs in TLS format */
  85     const unsigned char *tls_sct;
  86     size_t tls_sct_len;
  87     SCT *sct;
  88     /*
  89      * A file to load the expected SCT text from.
  90      * This text will be compared to the actual text output during the test.
  91      * A maximum of |CT_TEST_MAX_FILE_SIZE| bytes will be read of this file.
  92      */
  93     const char *sct_dir;
  94     const char *sct_text_file;
  95     /* Whether to test the validity of the SCT(s) */
  96     int test_validity;
  97
  98 } CT_TEST_FIXTURE;
  99
 100 static CT_TEST_FIXTURE set_up(const char *const test_case_name)
 101 {
 102     CT_TEST_FIXTURE fixture;
 103     int setup_ok = 1;
 104     CTLOG_STORE *ctlog_store = CTLOG_STORE_new();
 105
 106     if (ctlog_store == NULL) {
 107         setup_ok = 0;
 108         fprintf(stderr, "Failed to create a new CT log store\n");
 109         goto end;
 110     }
 111
 112     if (CTLOG_STORE_load_default_file(ctlog_store) != 1) {
 113         setup_ok = 0;
 114         fprintf(stderr, "Failed to load CT log list\n");
 115         goto end;
 116     }
 117
 118     memset(&fixture, 0, sizeof(fixture));
 119     fixture.test_case_name = test_case_name;
 120     fixture.ctlog_store = ctlog_store;
 121
 122 end:
 123     if (!setup_ok) {
 124         exit(EXIT_FAILURE);
 125     }
 126     return fixture;
 127 }
 128
 129 static void tear_down(CT_TEST_FIXTURE fixture)
 130 {
 131     CTLOG_STORE_free(fixture.ctlog_store);
 132     SCT_free(fixture.sct);
 133     ERR_print_errors_fp(stderr);
 134 }
 135
 136 static char *mk_file_path(const char *dir, const char *file)
 137 {
 138     char *full_file = NULL;
 139     size_t full_file_l = 0;
 140     const char *sep = "";
 141 #ifndef OPENSSL_SYS_VMS
 142     sep = "/";
 143 #endif
 144
 145     full_file_l = strlen(dir) + strlen(sep) + strlen(file) + 1;
 146     full_file = OPENSSL_zalloc(full_file_l);
 147     if (full_file != NULL) {
 148         OPENSSL_strlcpy(full_file, dir, full_file_l);
 149         OPENSSL_strlcat(full_file, sep, full_file_l);
 150         OPENSSL_strlcat(full_file, file, full_file_l);
 151     }
 152
 153     return full_file;
 154 }
 155
 156 static X509 *load_pem_cert(const char *dir, const char *file)
 157 {
 158     X509 *cert = NULL;
 159     char *file_path = mk_file_path(dir, file);
 160
 161     if (file_path != NULL) {
 162         BIO *cert_io = BIO_new_file(file_path, "r");
 163         OPENSSL_free(file_path);
 164
 165         if (cert_io != NULL)
 166             cert = PEM_read_bio_X509(cert_io, NULL, NULL, NULL);
 167
 168         BIO_free(cert_io);
 169     }
 170     return cert;
 171 }
 172
 173 static int read_text_file(const char *dir, const char *file,
 174                           char *buffer, int buffer_length)
 175 {
 176     int result = -1;
 177     char *file_path = mk_file_path(dir, file);
 178
 179     if (file_path != NULL) {
 180         BIO *file_io = BIO_new_file(file_path, "r");
 181         OPENSSL_free(file_path);
 182
 183         if (file_io != NULL) {
 184             result = BIO_read(file_io, buffer, buffer_length);
 185             BIO_free(file_io);
 186         }
 187     }
 188
 189     return result;
 190 }
 191
 192 static int compare_sct_printout(SCT *sct,
 193     const char *expected_output)
 194 {
 195     BIO *text_buffer = NULL;
 196     char *actual_output = NULL;
 197     int result = 1;
 198
 199     text_buffer = BIO_new(BIO_s_mem());
 200     if (text_buffer == NULL) {
 201         fprintf(stderr, "Unable to allocate buffer\n");
 202         goto end;
 203     }
 204
 205     SCT_print(sct, text_buffer, 0, NULL);
 206
 207     /* Append null terminator because we're about to use the buffer contents
 208     * as a string. */
 209     if (BIO_write(text_buffer, "\0", 1) != 1) {
 210         fprintf(stderr, "Failed to append null terminator to SCT text\n");
 211         goto end;
 212     }
 213
 214     BIO_get_mem_data(text_buffer, &actual_output);
 215     result = strcmp(actual_output, expected_output);
 216
 217     if (result != 0) {
 218         fprintf(stderr,
 219             "Expected SCT printout:\n%s\nActual SCT printout:\n%s\n",
 220             expected_output, actual_output);
 221     }
 222
 223 end:
 224     BIO_free(text_buffer);
 225     return result;
 226 }
 227
 228 static int compare_extension_printout(X509_EXTENSION *extension,
 229                                       const char *expected_output)
 230 {
 231     BIO *text_buffer = NULL;
 232     char *actual_output = NULL;
 233     int result = 1;
 234
 235     text_buffer = BIO_new(BIO_s_mem());
 236     if (text_buffer == NULL) {
 237         fprintf(stderr, "Unable to allocate buffer\n");
 238         goto end;
 239     }
 240
 241     if (!X509V3_EXT_print(text_buffer, extension, X509V3_EXT_DEFAULT, 0)) {
 242         fprintf(stderr, "Failed to print extension\n");
 243         goto end;
 244     }
 245
 246     /* Append null terminator because we're about to use the buffer contents
 247      * as a string. */
 248     if (BIO_write(text_buffer, "\0", 1) != 1) {
 249         fprintf(stderr, "Failed to append null terminator to extension text\n");
 250         goto end;
 251     }
 252
 253     BIO_get_mem_data(text_buffer, &actual_output);
 254     result = strcmp(actual_output, expected_output);
 255
 256     if (result != 0) {
 257         fprintf(stderr,
 258                 "Expected SCT printout:\n%s\nActual SCT printout:\n%s\n",
 259                 expected_output, actual_output);
 260     }
 261
 262 end:
 263     BIO_free(text_buffer);
 264     return result;
 265 }
 266
 267 static int execute_cert_test(CT_TEST_FIXTURE fixture)
 268 {
 269     int success = 0;
 270     X509 *cert = NULL, *issuer = NULL;
 271     STACK_OF(SCT) *scts = NULL;
 272     SCT *sct = NULL;
 273     char expected_sct_text[CT_TEST_MAX_FILE_SIZE];
 274     int sct_text_len = 0;
 275     unsigned char *tls_sct = NULL;
 276     size_t tls_sct_len = 0;
 277     CT_POLICY_EVAL_CTX *ct_policy_ctx = CT_POLICY_EVAL_CTX_new();
 278
 279     if (fixture.sct_text_file != NULL) {
 280         sct_text_len = read_text_file(fixture.sct_dir, fixture.sct_text_file,
 281                                       expected_sct_text,
 282                                       CT_TEST_MAX_FILE_SIZE - 1);
 283
 284         if (sct_text_len < 0) {
 285             fprintf(stderr, "Test data file not found: %s\n",
 286                 fixture.sct_text_file);
 287             goto end;
 288         }
 289
 290         expected_sct_text[sct_text_len] = '\0';
 291     }
 292
 293     CT_POLICY_EVAL_CTX_set0_log_store(ct_policy_ctx, fixture.ctlog_store);
 294
 295     if (fixture.certificate_file != NULL) {
 296         int sct_extension_index;
 297         X509_EXTENSION *sct_extension = NULL;
 298         cert = load_pem_cert(fixture.certs_dir, fixture.certificate_file);
 299
 300         if (cert == NULL) {
 301             fprintf(stderr, "Unable to load certificate: %s\n",
 302                 fixture.certificate_file);
 303             goto end;
 304         }
 305
 306         CT_POLICY_EVAL_CTX_set0_cert(ct_policy_ctx, cert);
 307
 308         if (fixture.issuer_file != NULL) {
 309             issuer = load_pem_cert(fixture.certs_dir, fixture.issuer_file);
 310
 311             if (issuer == NULL) {
 312                 fprintf(stderr, "Unable to load issuer certificate: %s\n",
 313                         fixture.issuer_file);
 314                 goto end;
 315             }
 316
 317             CT_POLICY_EVAL_CTX_set0_issuer(ct_policy_ctx, issuer);
 318         }
 319
 320         sct_extension_index =
 321                 X509_get_ext_by_NID(cert, NID_ct_precert_scts, -1);
 322         sct_extension = X509_get_ext(cert, sct_extension_index);
 323         if (fixture.expected_sct_count > 0) {
 324             if (sct_extension == NULL) {
 325                 fprintf(stderr, "SCT extension not found in: %s\n",
 326                     fixture.certificate_file);
 327                 goto end;
 328             }
 329
 330             if (fixture.sct_text_file
 331                 && compare_extension_printout(sct_extension,
 332                                               expected_sct_text)) {
 333                     goto end;
 334             }
 335
 336             if (fixture.test_validity) {
 337                 int are_scts_validated = 0;
 338                 int i;
 339
 340                 scts = X509V3_EXT_d2i(sct_extension);
 341                 for (i = 0; i < sk_SCT_num(scts); ++i) {
 342                     SCT *sct_i = sk_SCT_value(scts, i);
 343
 344                     if (!SCT_set_source(sct_i, SCT_SOURCE_X509V3_EXTENSION)) {
 345                         fprintf(stderr,
 346                                 "Error setting SCT source to X509v3 extension\n");
 347                         goto end;
 348                     }
 349                 }
 350
 351                 are_scts_validated = SCT_LIST_validate(scts, ct_policy_ctx);
 352                 if (are_scts_validated < 0) {
 353                     fprintf(stderr, "Error verifying SCTs\n");
 354                     goto end;
 355                 } else if (!are_scts_validated) {
 356                     int invalid_sct_count = 0;
 357                     int valid_sct_count = 0;
 358
 359                     for (i = 0; i < sk_SCT_num(scts); ++i) {
 360                         SCT *sct_i = sk_SCT_value(scts, i);
 361                         switch (SCT_get_validation_status(sct_i)) {
 362                         case SCT_VALIDATION_STATUS_VALID:
 363                             ++valid_sct_count;
 364                             break;
 365                         case SCT_VALIDATION_STATUS_INVALID:
 366                             ++invalid_sct_count;
 367                             break;
 368                         default:
 369                             /* Ignore other validation statuses. */
 370                             break;
 371                         }
 372                     }
 373
 374                     if (valid_sct_count != fixture.expected_sct_count) {
 375                         int unverified_sct_count = sk_SCT_num(scts) -
 376                                 invalid_sct_count - valid_sct_count;
 377
 378                         fprintf(stderr,
 379                                 "%d SCTs failed verification\n"
 380                                 "%d SCTs passed verification (%d expected)\n"
 381                                 "%d SCTs were unverified\n",
 382                                 invalid_sct_count,
 383                                 valid_sct_count,
 384                                 fixture.expected_sct_count,
 385                                 unverified_sct_count);
 386                     }
 387                     goto end;
 388                 }
 389             }
 390         } else if (sct_extension != NULL) {
 391             fprintf(stderr,
 392                     "Expected no SCTs, but found SCT extension in: %s\n",
 393                     fixture.certificate_file);
 394             goto end;
 395         }
 396     }
 397
 398     if (fixture.tls_sct != NULL) {
 399         const unsigned char *p = fixture.tls_sct;
 400         if (o2i_SCT(&sct, &p, fixture.tls_sct_len) == NULL) {
 401             fprintf(stderr, "Failed to decode SCT from TLS format\n");
 402             goto end;
 403         }
 404
 405         if (fixture.test_validity && cert != NULL) {
 406             int is_sct_validated = SCT_validate(sct, ct_policy_ctx);
 407             if (is_sct_validated < 0) {
 408                 fprintf(stderr, "Error validating SCT\n");
 409                 goto end;
 410             } else if (!is_sct_validated) {
 411                 fprintf(stderr, "SCT failed verification\n");
 412                 goto end;
 413             }
 414         }
 415
 416         if (fixture.sct_text_file
 417             && compare_sct_printout(sct, expected_sct_text)) {
 418                 goto end;
 419         }
 420
 421         tls_sct_len = i2o_SCT(sct, &tls_sct);
 422         if (tls_sct_len != fixture.tls_sct_len ||
 423             memcmp(fixture.tls_sct, tls_sct, tls_sct_len) != 0) {
 424             fprintf(stderr, "Failed to encode SCT into TLS format correctly\n");
 425             goto end;
 426         }
 427     }
 428     success = 1;
 429
 430 end:
 431     X509_free(cert);
 432     X509_free(issuer);
 433     SCT_LIST_free(scts);
 434     SCT_free(sct);
 435     CT_POLICY_EVAL_CTX_free(ct_policy_ctx);
 436     OPENSSL_free(tls_sct);
 437     return success;
 438 }
 439
 440 #define SETUP_CT_TEST_FIXTURE() SETUP_TEST_FIXTURE(CT_TEST_FIXTURE, set_up)
 441 #define EXECUTE_CT_TEST() EXECUTE_TEST(execute_cert_test, tear_down)
 442
 443 static int test_no_scts_in_certificate()
 444 {
 445     SETUP_CT_TEST_FIXTURE();
 446     fixture.certs_dir = certs_dir;
 447     fixture.certificate_file = "leaf.pem";
 448     fixture.issuer_file = "subinterCA.pem";
 449     fixture.expected_sct_count = 0;
 450     EXECUTE_CT_TEST();
 451 }
 452
 453 static int test_one_sct_in_certificate()
 454 {
 455     SETUP_CT_TEST_FIXTURE();
 456     fixture.certs_dir = certs_dir;
 457     fixture.certificate_file = "embeddedSCTs1.pem";
 458     fixture.issuer_file = "embeddedSCTs1_issuer.pem";
 459     fixture.expected_sct_count = 1;
 460     fixture.sct_dir = certs_dir;
 461     fixture.sct_text_file = "embeddedSCTs1.sct";
 462     EXECUTE_CT_TEST();
 463 }
 464
 465 static int test_multiple_scts_in_certificate()
 466 {
 467     SETUP_CT_TEST_FIXTURE();
 468     fixture.certs_dir = certs_dir;
 469     fixture.certificate_file = "embeddedSCTs3.pem";
 470     fixture.issuer_file = "embeddedSCTs3_issuer.pem";
 471     fixture.expected_sct_count = 3;
 472     fixture.sct_dir = certs_dir;
 473     fixture.sct_text_file = "embeddedSCTs3.sct";
 474     EXECUTE_CT_TEST();
 475 }
 476
 477 static int test_verify_one_sct()
 478 {
 479     SETUP_CT_TEST_FIXTURE();
 480     fixture.certs_dir = certs_dir;
 481     fixture.certificate_file = "embeddedSCTs1.pem";
 482     fixture.issuer_file = "embeddedSCTs1_issuer.pem";
 483     fixture.expected_sct_count = 1;
 484     fixture.test_validity = 1;
 485     EXECUTE_CT_TEST();
 486 }
 487
 488 static int test_verify_multiple_scts()
 489 {
 490     SETUP_CT_TEST_FIXTURE();
 491     fixture.certs_dir = certs_dir;
 492     fixture.certificate_file = "embeddedSCTs3.pem";
 493     fixture.issuer_file = "embeddedSCTs3_issuer.pem";
 494     fixture.expected_sct_count = 3;
 495     fixture.test_validity = 1;
 496     EXECUTE_CT_TEST();
 497 }
 498
 499 static int test_decode_tls_sct()
 500 {
 501     const unsigned char tls_sct[] = "\x00" /* version */
 502         /* log ID */
 503         "\xDF\x1C\x2E\xC1\x15\x00\x94\x52\x47\xA9\x61\x68\x32\x5D\xDC\x5C\x79"
 504         "\x59\xE8\xF7\xC6\xD3\x88\xFC\x00\x2E\x0B\xBD\x3F\x74\xD7\x64"
 505         "\x00\x00\x01\x3D\xDB\x27\xDF\x93" /* timestamp */
 506         "\x00\x00" /* extensions length */
 507         "" /* extensions */
 508         "\x04\x03" /* hash and signature algorithms */
 509         "\x00\x47" /* signature length */
 510         /* signature */
 511         "\x30\x45\x02\x20\x48\x2F\x67\x51\xAF\x35\xDB\xA6\x54\x36\xBE\x1F\xD6"
 512         "\x64\x0F\x3D\xBF\x9A\x41\x42\x94\x95\x92\x45\x30\x28\x8F\xA3\xE5\xE2"
 513         "\x3E\x06\x02\x21\x00\xE4\xED\xC0\xDB\x3A\xC5\x72\xB1\xE2\xF5\xE8\xAB"
 514         "\x6A\x68\x06\x53\x98\x7D\xCF\x41\x02\x7D\xFE\xFF\xA1\x05\x51\x9D\x89"
 515         "\xED\xBF\x08";
 516
 517     SETUP_CT_TEST_FIXTURE();
 518     fixture.tls_sct = tls_sct;
 519     fixture.tls_sct_len = 118;
 520     fixture.sct_dir = ct_dir;
 521     fixture.sct_text_file = "tls1.sct";
 522     EXECUTE_CT_TEST();
 523 }
 524
 525 static int test_encode_tls_sct()
 526 {
 527     const unsigned char log_id[] = "\xDF\x1C\x2E\xC1\x15\x00\x94\x52\x47\xA9"
 528             "\x61\x68\x32\x5D\xDC\x5C\x79\x59\xE8\xF7\xC6\xD3\x88\xFC\x00\x2E"
 529             "\x0B\xBD\x3F\x74\xD7\x64";
 530
 531     const unsigned char signature[] = "\x45\x02\x20\x48\x2F\x67\x51\xAF\x35"
 532             "\xDB\xA6\x54\x36\xBE\x1F\xD6\x64\x0F\x3D\xBF\x9A\x41\x42\x94\x95"
 533             "\x92\x45\x30\x28\x8F\xA3\xE5\xE2\x3E\x06\x02\x21\x00\xE4\xED\xC0"
 534             "\xDB\x3A\xC5\x72\xB1\xE2\xF5\xE8\xAB\x6A\x68\x06\x53\x98\x7D\xCF"
 535             "\x41\x02\x7D\xFE\xFF\xA1\x05\x51\x9D\x89\xED\xBF\x08";
 536
 537     SETUP_CT_TEST_FIXTURE();
 538
 539     SCT *sct = SCT_new();
 540     if (!SCT_set_version(sct, SCT_VERSION_V1)) {
 541         fprintf(stderr, "Failed to set SCT version\n");
 542         return 1;
 543     }
 544     if (!SCT_set1_log_id(sct, log_id, 32)) {
 545         fprintf(stderr, "Failed to set SCT log ID\n");
 546         return 1;
 547     }
 548     SCT_set_timestamp(sct, 1);
 549     if (!SCT_set_signature_nid(sct, NID_ecdsa_with_SHA256)) {
 550         fprintf(stderr, "Failed to set SCT signature NID\n");
 551         return 1;
 552     }
 553     if (!SCT_set1_signature(sct, signature, 71)) {
 554         fprintf(stderr, "Failed to set SCT signature\n");
 555         return 1;
 556     }
 557     fixture.sct = sct;
 558     fixture.sct_dir = ct_dir;
 559     fixture.sct_text_file = "tls1.sct";
 560     EXECUTE_CT_TEST();
 561 }
 562
 563 int main(int argc, char *argv[])
 564 {
 565     int result = 0;
 566     char *tmp_env = NULL;
 567
 568     tmp_env = getenv("OPENSSL_DEBUG_MEMORY");
 569     if (tmp_env != NULL && strcmp(tmp_env, "on") == 0)
 570         CRYPTO_set_mem_debug(1);
 571     CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ON);
 572
 573     tmp_env = getenv("CT_DIR");
 574     ct_dir = OPENSSL_strdup(tmp_env != NULL ? tmp_env : "ct");
 575     tmp_env = getenv("CERTS_DIR");
 576     certs_dir = OPENSSL_strdup(tmp_env != NULL ? tmp_env : "certs");
 577
 578     ADD_TEST(test_no_scts_in_certificate);
 579     ADD_TEST(test_one_sct_in_certificate);
 580     ADD_TEST(test_multiple_scts_in_certificate);
 581     ADD_TEST(test_verify_one_sct);
 582     ADD_TEST(test_verify_multiple_scts);
 583     ADD_TEST(test_decode_tls_sct);
 584     ADD_TEST(test_encode_tls_sct);
 585
 586     result = run_tests(argv[0]);
 587     ERR_print_errors_fp(stderr);
 588
 589     OPENSSL_free(ct_dir);
 590     OPENSSL_free(certs_dir);
 591
 592 #ifndef OPENSSL_NO_CRYPTO_MDEBUG
 593     if (CRYPTO_mem_leaks_fp(stderr) <= 0)
 594         result = 1;
 595 #endif
 596
 597     return result;
 598 }
 599
 600 #else /* OPENSSL_NO_CT */
 601
 602 int main(int argc, char* argv[])
 603 {
 604     return EXIT_SUCCESS;
 605 }
 606
 607 #endif /* OPENSSL_NO_CT */