2 * Tests the Certificate Transparency public API.
4 * Author: Rob Percival (robpercival@google.com)
6 * ====================================================================
7 * Copyright (c) 2016 The OpenSSL Project. All rights reserved.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
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
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/)"
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.
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.
35 * 6. Redistributions of any form whatsoever must retain the following
37 * "This product includes software developed by the OpenSSL Project
38 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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
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52 * ====================================================================
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>
69 /* Used when declaring buffers to read text files into */
70 #define CT_TEST_MAX_FILE_SIZE 8096
72 static char *certs_dir = NULL;
73 static char *ct_dir = NULL;
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;
83 int expected_sct_count;
84 /* Set the following to test handling of SCTs in TLS format */
85 const unsigned char *tls_sct;
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.
94 const char *sct_text_file;
95 /* Whether to test the validity of the SCT(s) */
100 static CT_TEST_FIXTURE set_up(const char *const test_case_name)
102 CT_TEST_FIXTURE fixture;
104 CTLOG_STORE *ctlog_store = CTLOG_STORE_new();
106 if (ctlog_store == NULL) {
108 fprintf(stderr, "Failed to create a new CT log store\n");
112 if (CTLOG_STORE_load_default_file(ctlog_store) != 1) {
114 fprintf(stderr, "Failed to load CT log list\n");
118 memset(&fixture, 0, sizeof(fixture));
119 fixture.test_case_name = test_case_name;
120 fixture.ctlog_store = ctlog_store;
129 static void tear_down(CT_TEST_FIXTURE fixture)
131 CTLOG_STORE_free(fixture.ctlog_store);
132 SCT_free(fixture.sct);
133 ERR_print_errors_fp(stderr);
136 static char *mk_file_path(const char *dir, const char *file)
138 char *full_file = NULL;
139 size_t full_file_l = 0;
140 const char *sep = "";
141 #ifndef OPENSSL_SYS_VMS
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);
156 static X509 *load_pem_cert(const char *dir, const char *file)
159 char *file_path = mk_file_path(dir, file);
161 if (file_path != NULL) {
162 BIO *cert_io = BIO_new_file(file_path, "r");
163 OPENSSL_free(file_path);
166 cert = PEM_read_bio_X509(cert_io, NULL, NULL, NULL);
173 static int read_text_file(const char *dir, const char *file,
174 char *buffer, int buffer_length)
177 char *file_path = mk_file_path(dir, file);
179 if (file_path != NULL) {
180 BIO *file_io = BIO_new_file(file_path, "r");
181 OPENSSL_free(file_path);
183 if (file_io != NULL) {
184 result = BIO_read(file_io, buffer, buffer_length);
192 static int compare_sct_printout(SCT *sct,
193 const char *expected_output)
195 BIO *text_buffer = NULL;
196 char *actual_output = NULL;
199 text_buffer = BIO_new(BIO_s_mem());
200 if (text_buffer == NULL) {
201 fprintf(stderr, "Unable to allocate buffer\n");
205 SCT_print(sct, text_buffer, 0, NULL);
207 /* Append null terminator because we're about to use the buffer contents
209 if (BIO_write(text_buffer, "\0", 1) != 1) {
210 fprintf(stderr, "Failed to append null terminator to SCT text\n");
214 BIO_get_mem_data(text_buffer, &actual_output);
215 result = strcmp(actual_output, expected_output);
219 "Expected SCT printout:\n%s\nActual SCT printout:\n%s\n",
220 expected_output, actual_output);
224 BIO_free(text_buffer);
228 static int compare_extension_printout(X509_EXTENSION *extension,
229 const char *expected_output)
231 BIO *text_buffer = NULL;
232 char *actual_output = NULL;
235 text_buffer = BIO_new(BIO_s_mem());
236 if (text_buffer == NULL) {
237 fprintf(stderr, "Unable to allocate buffer\n");
241 if (!X509V3_EXT_print(text_buffer, extension, X509V3_EXT_DEFAULT, 0)) {
242 fprintf(stderr, "Failed to print extension\n");
246 /* Append null terminator because we're about to use the buffer contents
248 if (BIO_write(text_buffer, "\0", 1) != 1) {
249 fprintf(stderr, "Failed to append null terminator to extension text\n");
253 BIO_get_mem_data(text_buffer, &actual_output);
254 result = strcmp(actual_output, expected_output);
258 "Expected SCT printout:\n%s\nActual SCT printout:\n%s\n",
259 expected_output, actual_output);
263 BIO_free(text_buffer);
267 static int execute_cert_test(CT_TEST_FIXTURE fixture)
270 X509 *cert = NULL, *issuer = NULL;
271 STACK_OF(SCT) *scts = 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();
279 if (fixture.sct_text_file != NULL) {
280 sct_text_len = read_text_file(fixture.sct_dir, fixture.sct_text_file,
282 CT_TEST_MAX_FILE_SIZE - 1);
284 if (sct_text_len < 0) {
286 fprintf(stderr, "Test data file not found: %s\n",
287 fixture.sct_text_file);
291 expected_sct_text[sct_text_len] = '\0';
294 CT_POLICY_EVAL_CTX_set0_log_store(ct_policy_ctx, fixture.ctlog_store);
296 if (fixture.certificate_file != NULL) {
297 int sct_extension_index;
298 X509_EXTENSION *sct_extension = NULL;
299 cert = load_pem_cert(fixture.certs_dir, fixture.certificate_file);
303 fprintf(stderr, "Unable to load certificate: %s\n",
304 fixture.certificate_file);
308 CT_POLICY_EVAL_CTX_set0_cert(ct_policy_ctx, cert);
310 if (fixture.issuer_file != NULL) {
311 issuer = load_pem_cert(fixture.certs_dir, fixture.issuer_file);
313 if (issuer == NULL) {
315 fprintf(stderr, "Unable to load issuer certificate: %s\n",
316 fixture.issuer_file);
320 CT_POLICY_EVAL_CTX_set0_issuer(ct_policy_ctx, issuer);
323 sct_extension_index =
324 X509_get_ext_by_NID(cert, NID_ct_precert_scts, -1);
325 sct_extension = X509_get_ext(cert, sct_extension_index);
326 if (fixture.expected_sct_count > 0) {
327 if (sct_extension == NULL) {
329 fprintf(stderr, "SCT extension not found in: %s\n",
330 fixture.certificate_file);
334 if (fixture.sct_text_file) {
335 test_failed = compare_extension_printout(sct_extension,
337 if (test_failed != 0)
341 if (fixture.test_validity) {
342 int are_scts_validated = 0;
345 scts = X509V3_EXT_d2i(sct_extension);
346 for (i = 0; i < sk_SCT_num(scts); ++i) {
347 SCT *sct_i = sk_SCT_value(scts, i);
349 if (!SCT_set_source(sct_i, SCT_SOURCE_X509V3_EXTENSION)) {
351 "Error setting SCT source to X509v3 extension\n");
357 are_scts_validated = SCT_LIST_validate(scts, ct_policy_ctx);
358 if (are_scts_validated < 0) {
359 fprintf(stderr, "Error verifying SCTs\n");
361 } else if (!are_scts_validated) {
362 int invalid_sct_count = 0;
363 int valid_sct_count = 0;
365 for (i = 0; i < sk_SCT_num(scts); ++i) {
366 SCT *sct_i = sk_SCT_value(scts, i);
367 switch (SCT_get_validation_status(sct_i)) {
368 case SCT_VALIDATION_STATUS_VALID:
371 case SCT_VALIDATION_STATUS_INVALID:
375 /* Ignore other validation statuses. */
380 if (valid_sct_count != fixture.expected_sct_count) {
381 int unverified_sct_count = sk_SCT_num(scts) -
382 invalid_sct_count - valid_sct_count;
385 "%d SCTs failed verification\n"
386 "%d SCTs passed verification (%d expected)\n"
387 "%d SCTs were unverified\n",
390 fixture.expected_sct_count,
391 unverified_sct_count);
396 if (test_failed != 0)
399 } else if (sct_extension != NULL) {
402 "Expected no SCTs, but found SCT extension in: %s\n",
403 fixture.certificate_file);
408 if (fixture.tls_sct != NULL) {
409 const unsigned char *p = fixture.tls_sct;
410 if (o2i_SCT(&sct, &p, fixture.tls_sct_len) == NULL) {
412 fprintf(stderr, "Failed to decode SCT from TLS format\n");
416 if (fixture.sct_text_file) {
417 test_failed = compare_sct_printout(sct, expected_sct_text);
418 if (test_failed != 0)
422 tls_sct_len = i2o_SCT(sct, &tls_sct);
423 if (tls_sct_len != fixture.tls_sct_len ||
424 memcmp(fixture.tls_sct, tls_sct, tls_sct_len) != 0) {
426 fprintf(stderr, "Failed to encode SCT into TLS format correctly\n");
430 if (fixture.test_validity && cert != NULL) {
431 int is_sct_validated = SCT_validate(sct, ct_policy_ctx);
432 if (is_sct_validated < 0) {
434 fprintf(stderr, "Error validating SCT\n");
436 } else if (!is_sct_validated) {
438 fprintf(stderr, "SCT failed verification\n");
449 CT_POLICY_EVAL_CTX_free(ct_policy_ctx);
450 OPENSSL_free(tls_sct);
454 #define SETUP_CT_TEST_FIXTURE() SETUP_TEST_FIXTURE(CT_TEST_FIXTURE, set_up)
455 #define EXECUTE_CT_TEST() EXECUTE_TEST(execute_cert_test, tear_down)
457 static int test_no_scts_in_certificate()
459 SETUP_CT_TEST_FIXTURE();
460 fixture.certs_dir = certs_dir;
461 fixture.certificate_file = "leaf.pem";
462 fixture.issuer_file = "subinterCA.pem";
463 fixture.expected_sct_count = 0;
467 static int test_one_sct_in_certificate()
469 SETUP_CT_TEST_FIXTURE();
470 fixture.certs_dir = certs_dir;
471 fixture.certificate_file = "embeddedSCTs1.pem";
472 fixture.issuer_file = "embeddedSCTs1_issuer.pem";
473 fixture.expected_sct_count = 1;
474 fixture.sct_dir = certs_dir;
475 fixture.sct_text_file = "embeddedSCTs1.sct";
479 static int test_multiple_scts_in_certificate()
481 SETUP_CT_TEST_FIXTURE();
482 fixture.certs_dir = certs_dir;
483 fixture.certificate_file = "embeddedSCTs3.pem";
484 fixture.issuer_file = "embeddedSCTs3_issuer.pem";
485 fixture.expected_sct_count = 3;
486 fixture.sct_dir = certs_dir;
487 fixture.sct_text_file = "embeddedSCTs3.sct";
491 static int test_verify_one_sct()
493 SETUP_CT_TEST_FIXTURE();
494 fixture.certs_dir = certs_dir;
495 fixture.certificate_file = "embeddedSCTs1.pem";
496 fixture.issuer_file = "embeddedSCTs1_issuer.pem";
497 fixture.expected_sct_count = 1;
498 fixture.test_validity = 1;
502 static int test_verify_multiple_scts()
504 SETUP_CT_TEST_FIXTURE();
505 fixture.certs_dir = certs_dir;
506 fixture.certificate_file = "embeddedSCTs3.pem";
507 fixture.issuer_file = "embeddedSCTs3_issuer.pem";
508 fixture.expected_sct_count = 3;
509 fixture.test_validity = 1;
513 static int test_decode_tls_sct()
515 const unsigned char tls_sct[] = "\x00" /* version */
517 "\xDF\x1C\x2E\xC1\x15\x00\x94\x52\x47\xA9\x61\x68\x32\x5D\xDC\x5C\x79"
518 "\x59\xE8\xF7\xC6\xD3\x88\xFC\x00\x2E\x0B\xBD\x3F\x74\xD7\x64"
519 "\x00\x00\x01\x3D\xDB\x27\xDF\x93" /* timestamp */
520 "\x00\x00" /* extensions length */
522 "\x04\x03" /* hash and signature algorithms */
523 "\x00\x47" /* signature length */
525 "\x30\x45\x02\x20\x48\x2F\x67\x51\xAF\x35\xDB\xA6\x54\x36\xBE\x1F\xD6"
526 "\x64\x0F\x3D\xBF\x9A\x41\x42\x94\x95\x92\x45\x30\x28\x8F\xA3\xE5\xE2"
527 "\x3E\x06\x02\x21\x00\xE4\xED\xC0\xDB\x3A\xC5\x72\xB1\xE2\xF5\xE8\xAB"
528 "\x6A\x68\x06\x53\x98\x7D\xCF\x41\x02\x7D\xFE\xFF\xA1\x05\x51\x9D\x89"
531 SETUP_CT_TEST_FIXTURE();
532 fixture.tls_sct = tls_sct;
533 fixture.tls_sct_len = 118;
534 fixture.sct_dir = ct_dir;
535 fixture.sct_text_file = "tls1.sct";
539 static int test_encode_tls_sct()
541 const unsigned char log_id[] = "\xDF\x1C\x2E\xC1\x15\x00\x94\x52\x47\xA9"
542 "\x61\x68\x32\x5D\xDC\x5C\x79\x59\xE8\xF7\xC6\xD3\x88\xFC\x00\x2E"
543 "\x0B\xBD\x3F\x74\xD7\x64";
545 const unsigned char signature[] = "\x45\x02\x20\x48\x2F\x67\x51\xAF\x35"
546 "\xDB\xA6\x54\x36\xBE\x1F\xD6\x64\x0F\x3D\xBF\x9A\x41\x42\x94\x95"
547 "\x92\x45\x30\x28\x8F\xA3\xE5\xE2\x3E\x06\x02\x21\x00\xE4\xED\xC0"
548 "\xDB\x3A\xC5\x72\xB1\xE2\xF5\xE8\xAB\x6A\x68\x06\x53\x98\x7D\xCF"
549 "\x41\x02\x7D\xFE\xFF\xA1\x05\x51\x9D\x89\xED\xBF\x08";
551 SETUP_CT_TEST_FIXTURE();
553 SCT *sct = SCT_new();
554 if (!SCT_set_version(sct, SCT_VERSION_V1)) {
555 fprintf(stderr, "Failed to set SCT version\n");
558 if (!SCT_set1_log_id(sct, log_id, 32)) {
559 fprintf(stderr, "Failed to set SCT log ID\n");
562 SCT_set_timestamp(sct, 1);
563 if (!SCT_set_signature_nid(sct, NID_ecdsa_with_SHA256)) {
564 fprintf(stderr, "Failed to set SCT signature NID\n");
567 if (!SCT_set1_signature(sct, signature, 71)) {
568 fprintf(stderr, "Failed to set SCT signature\n");
572 fixture.sct_dir = ct_dir;
573 fixture.sct_text_file = "tls1.sct";
577 int main(int argc, char *argv[])
580 char *tmp_env = NULL;
582 tmp_env = getenv("CT_DIR");
583 ct_dir = OPENSSL_strdup(tmp_env != NULL ? tmp_env : "ct");
584 tmp_env = getenv("CERTS_DIR");
585 certs_dir = OPENSSL_strdup(tmp_env != NULL ? tmp_env : "certs");
587 ADD_TEST(test_no_scts_in_certificate);
588 ADD_TEST(test_one_sct_in_certificate);
589 ADD_TEST(test_multiple_scts_in_certificate);
590 ADD_TEST(test_verify_one_sct);
591 ADD_TEST(test_verify_multiple_scts);
592 ADD_TEST(test_decode_tls_sct);
593 ADD_TEST(test_encode_tls_sct);
595 result = run_tests(argv[0]);
596 ERR_print_errors_fp(stderr);
598 OPENSSL_free(ct_dir);
599 OPENSSL_free(certs_dir);
604 #else /* OPENSSL_NO_CT */
606 int main(int argc, char* argv[])
611 #endif /* OPENSSL_NO_CT */