/* * Copyright 2016 The OpenSSL Project Authors. All Rights Reserved. * * Licensed under the OpenSSL license (the "License"). You may not use * this file except in compliance with the License. You can obtain a copy * in the file LICENSE in the source distribution or at * https://www.openssl.org/source/license.html */ #include #include #include #include #include #include #include #include #include #include #include "testutil.h" #ifndef OPENSSL_NO_CT /* Used when declaring buffers to read text files into */ #define CT_TEST_MAX_FILE_SIZE 8096 static char *certs_dir = NULL; static char *ct_dir = NULL; typedef struct ct_test_fixture { const char *test_case_name; /* The current time in milliseconds */ uint64_t epoch_time_in_ms; /* The CT log store to use during tests */ CTLOG_STORE* ctlog_store; /* Set the following to test handling of SCTs in X509 certificates */ const char *certs_dir; char *certificate_file; char *issuer_file; /* Expected number of SCTs */ int expected_sct_count; /* Expected number of valid SCTS */ int expected_valid_sct_count; /* Set the following to test handling of SCTs in TLS format */ const unsigned char *tls_sct_list; size_t tls_sct_list_len; STACK_OF(SCT) *sct_list; /* * A file to load the expected SCT text from. * This text will be compared to the actual text output during the test. * A maximum of |CT_TEST_MAX_FILE_SIZE| bytes will be read of this file. */ const char *sct_dir; const char *sct_text_file; /* Whether to test the validity of the SCT(s) */ int test_validity; } CT_TEST_FIXTURE; static CT_TEST_FIXTURE set_up(const char *const test_case_name) { CT_TEST_FIXTURE fixture; int setup_ok = 1; memset(&fixture, 0, sizeof(fixture)); fixture.test_case_name = test_case_name; fixture.epoch_time_in_ms = 1473269626000; /* Sep 7 17:33:46 2016 GMT */ fixture.ctlog_store = CTLOG_STORE_new(); if (fixture.ctlog_store == NULL) { setup_ok = 0; fprintf(stderr, "Failed to create a new CT log store\n"); goto end; } if (CTLOG_STORE_load_default_file(fixture.ctlog_store) != 1) { setup_ok = 0; fprintf(stderr, "Failed to load CT log list\n"); goto end; } end: if (!setup_ok) { CTLOG_STORE_free(fixture.ctlog_store); exit(EXIT_FAILURE); } return fixture; } static void tear_down(CT_TEST_FIXTURE fixture) { CTLOG_STORE_free(fixture.ctlog_store); SCT_LIST_free(fixture.sct_list); ERR_print_errors_fp(stderr); } static char *mk_file_path(const char *dir, const char *file) { char *full_file = NULL; size_t full_file_l = 0; const char *sep = ""; #ifndef OPENSSL_SYS_VMS sep = "/"; #endif full_file_l = strlen(dir) + strlen(sep) + strlen(file) + 1; full_file = OPENSSL_zalloc(full_file_l); if (full_file != NULL) { OPENSSL_strlcpy(full_file, dir, full_file_l); OPENSSL_strlcat(full_file, sep, full_file_l); OPENSSL_strlcat(full_file, file, full_file_l); } return full_file; } static X509 *load_pem_cert(const char *dir, const char *file) { X509 *cert = NULL; char *file_path = mk_file_path(dir, file); if (file_path != NULL) { BIO *cert_io = BIO_new_file(file_path, "r"); OPENSSL_free(file_path); if (cert_io != NULL) cert = PEM_read_bio_X509(cert_io, NULL, NULL, NULL); BIO_free(cert_io); } return cert; } static int read_text_file(const char *dir, const char *file, char *buffer, int buffer_length) { int result = -1; char *file_path = mk_file_path(dir, file); if (file_path != NULL) { BIO *file_io = BIO_new_file(file_path, "r"); OPENSSL_free(file_path); if (file_io != NULL) { result = BIO_read(file_io, buffer, buffer_length); BIO_free(file_io); } } return result; } static int compare_sct_list_printout(STACK_OF(SCT) *sct, const char *expected_output) { BIO *text_buffer = NULL; char *actual_output = NULL; int result = 1; text_buffer = BIO_new(BIO_s_mem()); if (text_buffer == NULL) { fprintf(stderr, "Unable to allocate buffer\n"); goto end; } SCT_LIST_print(sct, text_buffer, 0, "\n", NULL); /* Append null terminator because we're about to use the buffer contents * as a string. */ if (BIO_write(text_buffer, "\0", 1) != 1) { fprintf(stderr, "Failed to append null terminator to SCT text\n"); goto end; } BIO_get_mem_data(text_buffer, &actual_output); result = strcmp(actual_output, expected_output); if (result != 0) { fprintf(stderr, "Expected SCT printout:\n%s\nActual SCT printout:\n%s\n", expected_output, actual_output); } end: BIO_free(text_buffer); return result; } static int compare_extension_printout(X509_EXTENSION *extension, const char *expected_output) { BIO *text_buffer = NULL; char *actual_output = NULL; int result = 1; text_buffer = BIO_new(BIO_s_mem()); if (text_buffer == NULL) { fprintf(stderr, "Unable to allocate buffer\n"); goto end; } if (!X509V3_EXT_print(text_buffer, extension, X509V3_EXT_DEFAULT, 0)) { fprintf(stderr, "Failed to print extension\n"); goto end; } /* Append null terminator because we're about to use the buffer contents * as a string. */ if (BIO_write(text_buffer, "\0", 1) != 1) { fprintf(stderr, "Failed to append null terminator to extension text\n"); goto end; } BIO_get_mem_data(text_buffer, &actual_output); result = strcmp(actual_output, expected_output); if (result != 0) { fprintf(stderr, "Expected SCT printout:\n%s\nActual SCT printout:\n%s\n", expected_output, actual_output); } end: BIO_free(text_buffer); return result; } static int assert_validity(CT_TEST_FIXTURE fixture, STACK_OF(SCT) *scts, CT_POLICY_EVAL_CTX *policy_ctx) { int invalid_sct_count = 0; int valid_sct_count = 0; int i; if (SCT_LIST_validate(scts, policy_ctx) < 0) { fprintf(stderr, "Error verifying SCTs\n"); return 0; } for (i = 0; i < sk_SCT_num(scts); ++i) { SCT *sct_i = sk_SCT_value(scts, i); switch (SCT_get_validation_status(sct_i)) { case SCT_VALIDATION_STATUS_VALID: ++valid_sct_count; break; case SCT_VALIDATION_STATUS_INVALID: ++invalid_sct_count; break; default: /* Ignore other validation statuses. */ break; } } if (valid_sct_count != fixture.expected_valid_sct_count) { int unverified_sct_count = sk_SCT_num(scts) - invalid_sct_count - valid_sct_count; fprintf(stderr, "%d SCTs failed verification\n" "%d SCTs passed verification (%d expected)\n" "%d SCTs were unverified\n", invalid_sct_count, valid_sct_count, fixture.expected_valid_sct_count, unverified_sct_count); return 0; } return 1; } static int execute_cert_test(CT_TEST_FIXTURE fixture) { int success = 0; X509 *cert = NULL, *issuer = NULL; STACK_OF(SCT) *scts = NULL; SCT *sct = NULL; char expected_sct_text[CT_TEST_MAX_FILE_SIZE]; int sct_text_len = 0; unsigned char *tls_sct_list = NULL; size_t tls_sct_list_len = 0; CT_POLICY_EVAL_CTX *ct_policy_ctx = CT_POLICY_EVAL_CTX_new(); if (fixture.sct_text_file != NULL) { sct_text_len = read_text_file(fixture.sct_dir, fixture.sct_text_file, expected_sct_text, CT_TEST_MAX_FILE_SIZE - 1); if (sct_text_len < 0) { fprintf(stderr, "Test data file not found: %s\n", fixture.sct_text_file); goto end; } expected_sct_text[sct_text_len] = '\0'; } CT_POLICY_EVAL_CTX_set_shared_CTLOG_STORE( ct_policy_ctx, fixture.ctlog_store); CT_POLICY_EVAL_CTX_set_time(ct_policy_ctx, fixture.epoch_time_in_ms); if (fixture.certificate_file != NULL) { int sct_extension_index; X509_EXTENSION *sct_extension = NULL; cert = load_pem_cert(fixture.certs_dir, fixture.certificate_file); if (cert == NULL) { fprintf(stderr, "Unable to load certificate: %s\n", fixture.certificate_file); goto end; } CT_POLICY_EVAL_CTX_set1_cert(ct_policy_ctx, cert); if (fixture.issuer_file != NULL) { issuer = load_pem_cert(fixture.certs_dir, fixture.issuer_file); if (issuer == NULL) { fprintf(stderr, "Unable to load issuer certificate: %s\n", fixture.issuer_file); goto end; } CT_POLICY_EVAL_CTX_set1_issuer(ct_policy_ctx, issuer); } sct_extension_index = X509_get_ext_by_NID(cert, NID_ct_precert_scts, -1); sct_extension = X509_get_ext(cert, sct_extension_index); if (fixture.expected_sct_count > 0) { if (sct_extension == NULL) { fprintf(stderr, "SCT extension not found in: %s\n", fixture.certificate_file); goto end; } if (fixture.sct_text_file && compare_extension_printout(sct_extension, expected_sct_text)) { goto end; } if (fixture.test_validity) { int i; scts = X509V3_EXT_d2i(sct_extension); for (i = 0; i < sk_SCT_num(scts); ++i) { SCT *sct_i = sk_SCT_value(scts, i); if (!SCT_set_source(sct_i, SCT_SOURCE_X509V3_EXTENSION)) { fprintf(stderr, "Error setting SCT source to X509v3 extension\n"); goto end; } } if (!assert_validity(fixture, scts, ct_policy_ctx)) goto end; } } else if (sct_extension != NULL) { fprintf(stderr, "Expected no SCTs, but found SCT extension in: %s\n", fixture.certificate_file); goto end; } } if (fixture.tls_sct_list != NULL) { const unsigned char *p = fixture.tls_sct_list; if (o2i_SCT_LIST(&scts, &p, fixture.tls_sct_list_len) == NULL) { fprintf(stderr, "Failed to decode SCTs from TLS format\n"); goto end; } if (fixture.test_validity && cert != NULL) { if (!assert_validity(fixture, scts, ct_policy_ctx)) goto end; } if (fixture.sct_text_file && compare_sct_list_printout(scts, expected_sct_text)) { goto end; } tls_sct_list_len = i2o_SCT_LIST(scts, &tls_sct_list); if (tls_sct_list_len != fixture.tls_sct_list_len || memcmp(fixture.tls_sct_list, tls_sct_list, tls_sct_list_len) != 0) { fprintf(stderr, "Failed to encode SCTs into TLS format correctly\n"); goto end; } } success = 1; end: X509_free(cert); X509_free(issuer); SCT_LIST_free(scts); SCT_free(sct); CT_POLICY_EVAL_CTX_free(ct_policy_ctx); OPENSSL_free(tls_sct_list); return success; } #define SETUP_CT_TEST_FIXTURE() SETUP_TEST_FIXTURE(CT_TEST_FIXTURE, set_up) #define EXECUTE_CT_TEST() EXECUTE_TEST(execute_cert_test, tear_down) static int test_no_scts_in_certificate() { SETUP_CT_TEST_FIXTURE(); fixture.certs_dir = certs_dir; fixture.certificate_file = "leaf.pem"; fixture.issuer_file = "subinterCA.pem"; fixture.expected_sct_count = 0; EXECUTE_CT_TEST(); } static int test_one_sct_in_certificate() { SETUP_CT_TEST_FIXTURE(); fixture.certs_dir = certs_dir; fixture.certificate_file = "embeddedSCTs1.pem"; fixture.issuer_file = "embeddedSCTs1_issuer.pem"; fixture.expected_sct_count = 1; fixture.sct_dir = certs_dir; fixture.sct_text_file = "embeddedSCTs1.sct"; EXECUTE_CT_TEST(); } static int test_multiple_scts_in_certificate() { SETUP_CT_TEST_FIXTURE(); fixture.certs_dir = certs_dir; fixture.certificate_file = "embeddedSCTs3.pem"; fixture.issuer_file = "embeddedSCTs3_issuer.pem"; fixture.expected_sct_count = 3; fixture.sct_dir = certs_dir; fixture.sct_text_file = "embeddedSCTs3.sct"; EXECUTE_CT_TEST(); } static int test_verify_one_sct() { SETUP_CT_TEST_FIXTURE(); fixture.certs_dir = certs_dir; fixture.certificate_file = "embeddedSCTs1.pem"; fixture.issuer_file = "embeddedSCTs1_issuer.pem"; fixture.expected_sct_count = fixture.expected_valid_sct_count = 1; fixture.test_validity = 1; EXECUTE_CT_TEST(); } static int test_verify_multiple_scts() { SETUP_CT_TEST_FIXTURE(); fixture.certs_dir = certs_dir; fixture.certificate_file = "embeddedSCTs3.pem"; fixture.issuer_file = "embeddedSCTs3_issuer.pem"; fixture.expected_sct_count = fixture.expected_valid_sct_count = 3; fixture.test_validity = 1; EXECUTE_CT_TEST(); } static int test_verify_fails_for_future_sct() { SETUP_CT_TEST_FIXTURE(); fixture.epoch_time_in_ms = 1365094800000; /* Apr 4 17:00:00 2013 GMT */ fixture.certs_dir = certs_dir; fixture.certificate_file = "embeddedSCTs1.pem"; fixture.issuer_file = "embeddedSCTs1_issuer.pem"; fixture.expected_sct_count = 1; fixture.expected_valid_sct_count = 0; fixture.test_validity = 1; EXECUTE_CT_TEST(); } static int test_decode_tls_sct() { const unsigned char tls_sct_list[] = "\x00\x78" /* length of list */ "\x00\x76" "\x00" /* version */ /* log ID */ "\xDF\x1C\x2E\xC1\x15\x00\x94\x52\x47\xA9\x61\x68\x32\x5D\xDC\x5C\x79" "\x59\xE8\xF7\xC6\xD3\x88\xFC\x00\x2E\x0B\xBD\x3F\x74\xD7\x64" "\x00\x00\x01\x3D\xDB\x27\xDF\x93" /* timestamp */ "\x00\x00" /* extensions length */ "" /* extensions */ "\x04\x03" /* hash and signature algorithms */ "\x00\x47" /* signature length */ /* signature */ "\x30\x45\x02\x20\x48\x2F\x67\x51\xAF\x35\xDB\xA6\x54\x36\xBE\x1F\xD6" "\x64\x0F\x3D\xBF\x9A\x41\x42\x94\x95\x92\x45\x30\x28\x8F\xA3\xE5\xE2" "\x3E\x06\x02\x21\x00\xE4\xED\xC0\xDB\x3A\xC5\x72\xB1\xE2\xF5\xE8\xAB" "\x6A\x68\x06\x53\x98\x7D\xCF\x41\x02\x7D\xFE\xFF\xA1\x05\x51\x9D\x89" "\xED\xBF\x08"; SETUP_CT_TEST_FIXTURE(); fixture.tls_sct_list = tls_sct_list; fixture.tls_sct_list_len = 0x7a; fixture.sct_dir = ct_dir; fixture.sct_text_file = "tls1.sct"; EXECUTE_CT_TEST(); } static int test_encode_tls_sct() { const char log_id[] = "3xwuwRUAlFJHqWFoMl3cXHlZ6PfG04j8AC4LvT9012Q="; const uint64_t timestamp = 1; const char extensions[] = ""; const char signature[] = "BAMARzBAMiBIL2dRrzXbplQ2vh/WZA89v5pBQpSVkkUwKI+j5" "eI+BgIhAOTtwNs6xXKx4vXoq2poBlOYfc9BAn3+/6EFUZ2J7b8I"; SCT *sct = NULL; SETUP_CT_TEST_FIXTURE(); fixture.sct_list = sk_SCT_new_null(); sct = SCT_new_from_base64(SCT_VERSION_V1, log_id, CT_LOG_ENTRY_TYPE_X509, timestamp, extensions, signature); if (sct == NULL) { tear_down(fixture); fprintf(stderr, "Failed to create SCT from base64-encoded test data\n"); return 0; } sk_SCT_push(fixture.sct_list, sct); fixture.sct_dir = ct_dir; fixture.sct_text_file = "tls1.sct"; EXECUTE_CT_TEST(); } /* * Tests that the CT_POLICY_EVAL_CTX default time is approximately now. * Allow +-10 minutes, as it may compensate for clock skew. */ static int test_default_ct_policy_eval_ctx_time_is_now() { int success = 0; CT_POLICY_EVAL_CTX *ct_policy_ctx = CT_POLICY_EVAL_CTX_new(); const time_t default_time = CT_POLICY_EVAL_CTX_get_time(ct_policy_ctx) / 1000; const time_t time_tolerance = 600; /* 10 minutes */ if (fabs(difftime(time(NULL), default_time)) > time_tolerance) { fprintf(stderr, "Default CT_POLICY_EVAL_CTX time is not approximately now.\n"); goto end; } success = 1; end: CT_POLICY_EVAL_CTX_free(ct_policy_ctx); return success; } int main(int argc, char *argv[]) { int result = 0; char *tmp_env = NULL; tmp_env = getenv("OPENSSL_DEBUG_MEMORY"); if (tmp_env != NULL && strcmp(tmp_env, "on") == 0) CRYPTO_set_mem_debug(1); CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ON); tmp_env = getenv("CT_DIR"); ct_dir = OPENSSL_strdup(tmp_env != NULL ? tmp_env : "ct"); tmp_env = getenv("CERTS_DIR"); certs_dir = OPENSSL_strdup(tmp_env != NULL ? tmp_env : "certs"); ADD_TEST(test_no_scts_in_certificate); ADD_TEST(test_one_sct_in_certificate); ADD_TEST(test_multiple_scts_in_certificate); ADD_TEST(test_verify_one_sct); ADD_TEST(test_verify_multiple_scts); ADD_TEST(test_verify_fails_for_future_sct); ADD_TEST(test_decode_tls_sct); ADD_TEST(test_encode_tls_sct); ADD_TEST(test_default_ct_policy_eval_ctx_time_is_now); result = run_tests(argv[0]); ERR_print_errors_fp(stderr); OPENSSL_free(ct_dir); OPENSSL_free(certs_dir); #ifndef OPENSSL_NO_CRYPTO_MDEBUG if (CRYPTO_mem_leaks_fp(stderr) <= 0) result = 1; #endif return result; } #else /* OPENSSL_NO_CT */ int main(int argc, char* argv[]) { return EXIT_SUCCESS; } #endif /* OPENSSL_NO_CT */