611 lines
19 KiB
C
611 lines
19 KiB
C
/*
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* Tests the Certificate Transparency public API.
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*
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* Author: Rob Percival (robpercival@google.com)
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*
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* ====================================================================
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* Copyright (c) 2016 The OpenSSL Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* licensing@OpenSSL.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*/
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#include <ctype.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <openssl/ct.h>
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#include <openssl/err.h>
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#include <openssl/pem.h>
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#include <openssl/x509.h>
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#include <openssl/x509v3.h>
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#include "testutil.h"
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#ifndef OPENSSL_NO_CT
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/* Used when declaring buffers to read text files into */
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#define CT_TEST_MAX_FILE_SIZE 8096
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static char *certs_dir = NULL;
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static char *ct_dir = NULL;
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typedef struct ct_test_fixture {
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const char *test_case_name;
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/* The CT log store to use during tests */
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CTLOG_STORE* ctlog_store;
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/* Set the following to test handling of SCTs in X509 certificates */
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const char *certs_dir;
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char *certificate_file;
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char *issuer_file;
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int expected_sct_count;
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/* Set the following to test handling of SCTs in TLS format */
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const unsigned char *tls_sct;
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size_t tls_sct_len;
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SCT *sct;
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/*
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* A file to load the expected SCT text from.
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* This text will be compared to the actual text output during the test.
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* A maximum of |CT_TEST_MAX_FILE_SIZE| bytes will be read of this file.
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*/
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const char *sct_dir;
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const char *sct_text_file;
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/* Whether to test the validity of the SCT(s) */
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int test_validity;
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} CT_TEST_FIXTURE;
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static CT_TEST_FIXTURE set_up(const char *const test_case_name)
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{
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CT_TEST_FIXTURE fixture;
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int setup_ok = 1;
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CTLOG_STORE *ctlog_store = CTLOG_STORE_new();
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if (ctlog_store == NULL) {
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setup_ok = 0;
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fprintf(stderr, "Failed to create a new CT log store\n");
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goto end;
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}
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if (CTLOG_STORE_load_default_file(ctlog_store) != 1) {
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setup_ok = 0;
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fprintf(stderr, "Failed to load CT log list\n");
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goto end;
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}
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memset(&fixture, 0, sizeof(fixture));
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fixture.test_case_name = test_case_name;
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fixture.ctlog_store = ctlog_store;
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end:
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if (!setup_ok) {
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exit(EXIT_FAILURE);
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}
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return fixture;
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}
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static void tear_down(CT_TEST_FIXTURE fixture)
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{
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CTLOG_STORE_free(fixture.ctlog_store);
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SCT_free(fixture.sct);
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ERR_print_errors_fp(stderr);
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}
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static char *mk_file_path(const char *dir, const char *file)
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{
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char *full_file = NULL;
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size_t full_file_l = 0;
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const char *sep = "";
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#ifndef OPENSSL_SYS_VMS
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sep = "/";
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#endif
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full_file_l = strlen(dir) + strlen(sep) + strlen(file) + 1;
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full_file = OPENSSL_zalloc(full_file_l);
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if (full_file != NULL) {
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OPENSSL_strlcpy(full_file, dir, full_file_l);
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OPENSSL_strlcat(full_file, sep, full_file_l);
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OPENSSL_strlcat(full_file, file, full_file_l);
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}
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return full_file;
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}
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static X509 *load_pem_cert(const char *dir, const char *file)
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{
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X509 *cert = NULL;
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char *file_path = mk_file_path(dir, file);
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if (file_path != NULL) {
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BIO *cert_io = BIO_new_file(file_path, "r");
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OPENSSL_free(file_path);
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if (cert_io != NULL)
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cert = PEM_read_bio_X509(cert_io, NULL, NULL, NULL);
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BIO_free(cert_io);
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}
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return cert;
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}
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static int read_text_file(const char *dir, const char *file,
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char *buffer, int buffer_length)
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{
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int result = -1;
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char *file_path = mk_file_path(dir, file);
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if (file_path != NULL) {
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BIO *file_io = BIO_new_file(file_path, "r");
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OPENSSL_free(file_path);
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if (file_io != NULL) {
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result = BIO_read(file_io, buffer, buffer_length);
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BIO_free(file_io);
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}
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}
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return result;
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}
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static int compare_sct_printout(SCT *sct,
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const char *expected_output)
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{
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BIO *text_buffer = NULL;
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char *actual_output = NULL;
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int result = 1;
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text_buffer = BIO_new(BIO_s_mem());
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if (text_buffer == NULL) {
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fprintf(stderr, "Unable to allocate buffer\n");
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goto end;
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}
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SCT_print(sct, text_buffer, 0);
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/* Append null terminator because we're about to use the buffer contents
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* as a string. */
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if (BIO_write(text_buffer, "\0", 1) != 1) {
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fprintf(stderr, "Failed to append null terminator to SCT text\n");
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goto end;
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}
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BIO_get_mem_data(text_buffer, &actual_output);
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result = strcmp(actual_output, expected_output);
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if (result != 0) {
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fprintf(stderr,
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"Expected SCT printout:\n%s\nActual SCT printout:\n%s\n",
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expected_output, actual_output);
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}
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end:
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BIO_free(text_buffer);
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return result;
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}
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static int compare_extension_printout(X509_EXTENSION *extension,
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const char *expected_output)
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{
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BIO *text_buffer = NULL;
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char *actual_output = NULL;
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int result = 1;
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text_buffer = BIO_new(BIO_s_mem());
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if (text_buffer == NULL) {
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fprintf(stderr, "Unable to allocate buffer\n");
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goto end;
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}
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if (!X509V3_EXT_print(text_buffer, extension, X509V3_EXT_DEFAULT, 0)) {
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fprintf(stderr, "Failed to print extension\n");
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goto end;
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}
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/* Append null terminator because we're about to use the buffer contents
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* as a string. */
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if (BIO_write(text_buffer, "\0", 1) != 1) {
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fprintf(stderr, "Failed to append null terminator to extension text\n");
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goto end;
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}
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BIO_get_mem_data(text_buffer, &actual_output);
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result = strcmp(actual_output, expected_output);
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if (result != 0) {
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fprintf(stderr,
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"Expected SCT printout:\n%s\nActual SCT printout:\n%s\n",
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expected_output, actual_output);
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}
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end:
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BIO_free(text_buffer);
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return result;
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}
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static int execute_cert_test(CT_TEST_FIXTURE fixture)
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{
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int test_failed = 0;
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X509 *cert = NULL, *issuer = NULL;
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STACK_OF(SCT) *scts = NULL;
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SCT *sct = NULL;
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char expected_sct_text[CT_TEST_MAX_FILE_SIZE];
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int sct_text_len = 0;
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unsigned char *tls_sct = NULL;
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size_t tls_sct_len = 0;
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CT_POLICY_EVAL_CTX *ct_policy_ctx = CT_POLICY_EVAL_CTX_new();
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if (fixture.sct_text_file != NULL) {
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sct_text_len = read_text_file(fixture.sct_dir, fixture.sct_text_file,
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expected_sct_text,
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CT_TEST_MAX_FILE_SIZE - 1);
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if (sct_text_len < 0) {
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test_failed = 1;
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fprintf(stderr, "Test data file not found: %s\n",
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fixture.sct_text_file);
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goto end;
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}
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expected_sct_text[sct_text_len] = '\0';
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}
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CT_POLICY_EVAL_CTX_set0_log_store(ct_policy_ctx, fixture.ctlog_store);
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if (fixture.certificate_file != NULL) {
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int sct_extension_index;
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X509_EXTENSION *sct_extension = NULL;
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cert = load_pem_cert(fixture.certs_dir, fixture.certificate_file);
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if (cert == NULL) {
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test_failed = 1;
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fprintf(stderr, "Unable to load certificate: %s\n",
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fixture.certificate_file);
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goto end;
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}
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CT_POLICY_EVAL_CTX_set0_cert(ct_policy_ctx, cert);
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if (fixture.issuer_file != NULL) {
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issuer = load_pem_cert(fixture.certs_dir, fixture.issuer_file);
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if (issuer == NULL) {
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test_failed = 1;
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fprintf(stderr, "Unable to load issuer certificate: %s\n",
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fixture.issuer_file);
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goto end;
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}
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CT_POLICY_EVAL_CTX_set0_issuer(ct_policy_ctx, issuer);
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}
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sct_extension_index =
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X509_get_ext_by_NID(cert, NID_ct_precert_scts, -1);
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sct_extension = X509_get_ext(cert, sct_extension_index);
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if (fixture.expected_sct_count > 0) {
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if (sct_extension == NULL) {
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test_failed = 1;
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fprintf(stderr, "SCT extension not found in: %s\n",
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fixture.certificate_file);
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goto end;
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}
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if (fixture.sct_text_file) {
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test_failed = compare_extension_printout(sct_extension,
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expected_sct_text);
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if (test_failed != 0)
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goto end;
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}
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if (fixture.test_validity) {
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int are_scts_validated = 0;
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int i;
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scts = X509V3_EXT_d2i(sct_extension);
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for (i = 0; i < sk_SCT_num(scts); ++i) {
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SCT *sct_i = sk_SCT_value(scts, i);
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if (!SCT_set_source(sct_i, SCT_SOURCE_X509V3_EXTENSION)) {
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fprintf(stderr,
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"Error setting SCT source to X509v3 extension\n");
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test_failed = 1;
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goto end;
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}
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}
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are_scts_validated = SCT_LIST_validate(scts, ct_policy_ctx);
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if (are_scts_validated < 0) {
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fprintf(stderr, "Error verifying SCTs\n");
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test_failed = 1;
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} else if (!are_scts_validated) {
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int invalid_sct_count = 0;
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int valid_sct_count = 0;
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for (i = 0; i < sk_SCT_num(scts); ++i) {
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SCT *sct_i = sk_SCT_value(scts, i);
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switch (SCT_get_validation_status(sct_i)) {
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case SCT_VALIDATION_STATUS_VALID:
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++valid_sct_count;
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break;
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case SCT_VALIDATION_STATUS_INVALID:
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++invalid_sct_count;
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break;
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default:
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/* Ignore other validation statuses. */
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break;
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}
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}
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if (valid_sct_count != fixture.expected_sct_count) {
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int unverified_sct_count = sk_SCT_num(scts) -
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invalid_sct_count - valid_sct_count;
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fprintf(stderr,
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"%d SCTs failed verification\n"
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"%d SCTs passed verification (%d expected)\n"
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"%d SCTs were unverified\n",
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invalid_sct_count,
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valid_sct_count,
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fixture.expected_sct_count,
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unverified_sct_count);
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}
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test_failed = 1;
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}
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if (test_failed != 0)
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goto end;
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}
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} else if (sct_extension != NULL) {
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test_failed = 1;
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fprintf(stderr,
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"Expected no SCTs, but found SCT extension in: %s\n",
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fixture.certificate_file);
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goto end;
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}
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}
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if (fixture.tls_sct != NULL) {
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const unsigned char *p = fixture.tls_sct;
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if (o2i_SCT(&sct, &p, fixture.tls_sct_len) == NULL) {
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test_failed = 1;
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fprintf(stderr, "Failed to decode SCT from TLS format\n");
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goto end;
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}
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if (fixture.sct_text_file) {
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test_failed = compare_sct_printout(sct, expected_sct_text);
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if (test_failed != 0)
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goto end;
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}
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tls_sct_len = i2o_SCT(sct, &tls_sct);
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if (tls_sct_len != fixture.tls_sct_len ||
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memcmp(fixture.tls_sct, tls_sct, tls_sct_len) != 0) {
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test_failed = 1;
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fprintf(stderr, "Failed to encode SCT into TLS format correctly\n");
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goto end;
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}
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if (fixture.test_validity && cert != NULL) {
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int is_sct_validated = SCT_validate(sct, ct_policy_ctx);
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if (is_sct_validated < 0) {
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test_failed = 1;
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fprintf(stderr, "Error validating SCT\n");
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goto end;
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} else if (!is_sct_validated) {
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test_failed = 1;
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fprintf(stderr, "SCT failed verification\n");
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goto end;
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}
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}
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}
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end:
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X509_free(cert);
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X509_free(issuer);
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SCT_LIST_free(scts);
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SCT_free(sct);
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CT_POLICY_EVAL_CTX_free(ct_policy_ctx);
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OPENSSL_free(tls_sct);
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return test_failed;
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}
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#define SETUP_CT_TEST_FIXTURE() SETUP_TEST_FIXTURE(CT_TEST_FIXTURE, set_up)
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#define EXECUTE_CT_TEST() EXECUTE_TEST(execute_cert_test, tear_down)
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static int test_no_scts_in_certificate()
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{
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SETUP_CT_TEST_FIXTURE();
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fixture.certs_dir = certs_dir;
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fixture.certificate_file = "leaf.pem";
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fixture.issuer_file = "subinterCA.pem";
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fixture.expected_sct_count = 0;
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EXECUTE_CT_TEST();
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}
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static int test_one_sct_in_certificate()
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{
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SETUP_CT_TEST_FIXTURE();
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fixture.certs_dir = certs_dir;
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fixture.certificate_file = "embeddedSCTs1.pem";
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fixture.issuer_file = "embeddedSCTs1_issuer.pem";
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fixture.expected_sct_count = 1;
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fixture.sct_dir = certs_dir;
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fixture.sct_text_file = "embeddedSCTs1.sct";
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EXECUTE_CT_TEST();
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}
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static int test_multiple_scts_in_certificate()
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{
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SETUP_CT_TEST_FIXTURE();
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fixture.certs_dir = certs_dir;
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fixture.certificate_file = "embeddedSCTs3.pem";
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fixture.issuer_file = "embeddedSCTs3_issuer.pem";
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fixture.expected_sct_count = 3;
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fixture.sct_dir = certs_dir;
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fixture.sct_text_file = "embeddedSCTs3.sct";
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EXECUTE_CT_TEST();
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}
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static int test_verify_one_sct()
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{
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SETUP_CT_TEST_FIXTURE();
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fixture.certs_dir = certs_dir;
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fixture.certificate_file = "embeddedSCTs1.pem";
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fixture.issuer_file = "embeddedSCTs1_issuer.pem";
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fixture.expected_sct_count = 1;
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fixture.test_validity = 1;
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EXECUTE_CT_TEST();
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}
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static int test_verify_multiple_scts()
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|
{
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SETUP_CT_TEST_FIXTURE();
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fixture.certs_dir = certs_dir;
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fixture.certificate_file = "embeddedSCTs3.pem";
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fixture.issuer_file = "embeddedSCTs3_issuer.pem";
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fixture.expected_sct_count = 3;
|
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fixture.test_validity = 1;
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EXECUTE_CT_TEST();
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|
}
|
|
|
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static int test_decode_tls_sct()
|
|
{
|
|
const unsigned char tls_sct[] = "\x00" /* version */
|
|
/* log ID */
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|
"\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 = tls_sct;
|
|
fixture.tls_sct_len = 118;
|
|
fixture.sct_dir = ct_dir;
|
|
fixture.sct_text_file = "tls1.sct";
|
|
EXECUTE_CT_TEST();
|
|
}
|
|
|
|
static int test_encode_tls_sct()
|
|
{
|
|
const unsigned char 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";
|
|
|
|
const unsigned char signature[] = "\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();
|
|
|
|
SCT *sct = SCT_new();
|
|
if (!SCT_set_version(sct, SCT_VERSION_V1)) {
|
|
fprintf(stderr, "Failed to set SCT version\n");
|
|
return 1;
|
|
}
|
|
if (!SCT_set1_log_id(sct, log_id, 32)) {
|
|
fprintf(stderr, "Failed to set SCT log ID\n");
|
|
return 1;
|
|
}
|
|
SCT_set_timestamp(sct, 1);
|
|
if (!SCT_set_signature_nid(sct, NID_ecdsa_with_SHA256)) {
|
|
fprintf(stderr, "Failed to set SCT signature NID\n");
|
|
return 1;
|
|
}
|
|
if (!SCT_set1_signature(sct, signature, 71)) {
|
|
fprintf(stderr, "Failed to set SCT signature\n");
|
|
return 1;
|
|
}
|
|
fixture.sct = sct;
|
|
fixture.sct_dir = ct_dir;
|
|
fixture.sct_text_file = "tls1.sct";
|
|
EXECUTE_CT_TEST();
|
|
}
|
|
|
|
int main(int argc, char *argv[])
|
|
{
|
|
int result = 0;
|
|
char *tmp_env = NULL;
|
|
|
|
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_decode_tls_sct);
|
|
ADD_TEST(test_encode_tls_sct);
|
|
|
|
result = run_tests(argv[0]);
|
|
ERR_print_errors_fp(stderr);
|
|
|
|
OPENSSL_free(ct_dir);
|
|
OPENSSL_free(certs_dir);
|
|
|
|
return result;
|
|
}
|
|
|
|
#else /* OPENSSL_NO_CT */
|
|
|
|
int main(int argc, char* argv[])
|
|
{
|
|
return EXIT_SUCCESS;
|
|
}
|
|
|
|
#endif /* OPENSSL_NO_CT */
|