mirror of
https://github.com/openssl/openssl.git
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0cea8832df
Reviewed-by: Ben Laurie <ben@openssl.org> Reviewed-by: Rich Salz <rsalz@openssl.org>
404 lines
12 KiB
C
404 lines
12 KiB
C
/*
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* Tests the Certificate Transparency public and internal APIs.
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*
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* Author: Rob Percival (robpercival@google.com)
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* Date: 2016-01-26
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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/ssl.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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#if !defined(OPENSSL_NO_CT) && !defined(OPENSSL_NO_UNIT_TEST)
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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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typedef struct ct_test_fixture {
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const char *test_case_name;
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/* Set the following to test handling of SCTs in X509 certificates */
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const char *certificate_file_path;
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size_t expected_sct_count;
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/* Set the following to test handling of SCTs in TLS format */
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const uint8_t *tls_sct;
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size_t tls_sct_len;
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const 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_text_file_path;
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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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memset(&fixture, 0, sizeof(fixture));
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fixture.test_case_name = test_case_name;
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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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ERR_print_errors_fp(stderr);
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}
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static X509 *load_pem_cert(const char *file)
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{
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BIO *cert_io = BIO_new_file(file, "r");
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X509 *cert = NULL;
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if (cert_io == NULL) goto end;
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cert = PEM_read_bio_X509(cert_io, NULL, NULL, NULL);
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end:
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BIO_free(cert_io);
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return cert;
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}
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static int read_text_file(const char *path, char *buffer, int buffer_length)
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{
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BIO *file = BIO_new_file(path, "r");
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int result = -1;
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if (file != NULL) {
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result = BIO_read(file, buffer, buffer_length);
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BIO_free(file);
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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 result = 0;
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X509 *cert = 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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if (fixture.sct_text_file_path != NULL) {
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sct_text_len = read_text_file(
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fixture.sct_text_file_path,
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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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result = 1;
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fprintf(stderr, "Test data file not found: %s\n",
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fixture.sct_text_file_path);
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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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if (fixture.certificate_file_path != 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.certificate_file_path);
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if (cert == NULL) {
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result = 1;
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fprintf(stderr, "Unable to load certificate: %s\n",
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fixture.certificate_file_path);
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goto end;
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}
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sct_extension_index = 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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result = 1;
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fprintf(stderr, "SCT extension not found in: %s\n",
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fixture.certificate_file_path);
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goto end;
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}
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if (fixture.sct_text_file_path) {
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result = compare_extension_printout(sct_extension,
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expected_sct_text);
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if (result != 0)
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goto end;
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}
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} else if (sct_extension != NULL) {
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result = 1;
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fprintf(stderr, "Expected no SCTs, but found SCT extension in: %s\n",
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fixture.certificate_file_path);
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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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unsigned char *tls_sct;
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size_t tls_sct_len;
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if (o2i_SCT(&sct, &p, fixture.tls_sct_len) == NULL) {
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result = 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_path) {
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result = compare_sct_printout(sct, expected_sct_text);
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if (result != 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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result = 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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}
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end:
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X509_free(cert);
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SCT_free(sct);
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return result;
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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.certificate_file_path = "certs/leaf.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.certificate_file_path = "certs/embeddedSCTs1.pem";
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fixture.expected_sct_count = 1;
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fixture.sct_text_file_path = "certs/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.certificate_file_path = "certs/embeddedSCTs3.pem";
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fixture.expected_sct_count = 3;
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fixture.sct_text_file_path = "certs/embeddedSCTs3.sct";
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EXECUTE_CT_TEST();
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}
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static int test_decode_tls_sct()
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{
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SETUP_CT_TEST_FIXTURE();
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fixture.tls_sct = (unsigned char *)
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"\x00" /* version */
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/* log ID */
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"\xDF\x1C\x2E\xC1\x15\x00\x94\x52\x47\xA9\x61\x68\x32\x5D\xDC\x5C\x79"
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"\x59\xE8\xF7\xC6\xD3\x88\xFC\x00\x2E\x0B\xBD\x3F\x74\xD7\x64"
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"\x00\x00\x01\x3D\xDB\x27\xDF\x93" /* timestamp */
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"\x00\x00" /* extensions length */
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"" /* extensions */
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"\x04\x03" /* hash and signature algorithms */
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"\x00\x47" /* signature length */
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"\x30\x45\x02\x20\x48\x2F\x67\x51\xAF\x35\xDB\xA6\x54\x36\xBE\x1F\xD6"
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"\x64\x0F\x3D\xBF\x9A\x41\x42\x94\x95\x92\x45\x30\x28\x8F\xA3\xE5\xE2"
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"\x3E\x06\x02\x21\x00\xE4\xED\xC0\xDB\x3A\xC5\x72\xB1\xE2\xF5\xE8\xAB"
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"\x6A\x68\x06\x53\x98\x7D\xCF\x41\x02\x7D\xFE\xFF\xA1\x05\x51\x9D\x89"
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"\xED\xBF\x08"; /* signature */
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fixture.tls_sct_len = 118;
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fixture.sct_text_file_path = "ct/tls1.sct";
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EXECUTE_CT_TEST();
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}
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static int test_encode_tls_sct()
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{
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SETUP_CT_TEST_FIXTURE();
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SCT *sct = SCT_new();
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SCT_set_version(sct, 0);
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SCT_set1_log_id(sct, (unsigned char *)
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"\xDF\x1C\x2E\xC1\x15\x00\x94\x52\x47\xA9\x61\x68\x32\x5D\xDC\x5C\x79"
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"\x59\xE8\xF7\xC6\xD3\x88\xFC\x00\x2E\x0B\xBD\x3F\x74\xD7\x64", 32);
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SCT_set_timestamp(sct, 1);
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SCT_set1_extensions(sct, (unsigned char *)"", 0);
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SCT_set_signature_nid(sct, NID_ecdsa_with_SHA256);
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SCT_set1_signature(sct, (unsigned char *)
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"\x45\x02\x20\x48\x2F\x67\x51\xAF\x35\xDB\xA6\x54\x36\xBE"
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"\x1F\xD6\x64\x0F\x3D\xBF\x9A\x41\x42\x94\x95\x92\x45\x30\x28\x8F\xA3"
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"\xE5\xE2\x3E\x06\x02\x21\x00\xE4\xED\xC0\xDB\x3A\xC5\x72\xB1\xE2\xF5"
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"\xE8\xAB\x6A\x68\x06\x53\x98\x7D\xCF\x41\x02\x7D\xFE\xFF\xA1\x05\x51"
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"\x9D\x89\xED\xBF\x08", 71);
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fixture.sct = sct;
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fixture.sct_text_file_path = "ct/tls1.sct";
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EXECUTE_CT_TEST();
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SCT_free(sct);
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}
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int main(int argc, char *argv[])
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{
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int result = 0;
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ADD_TEST(test_no_scts_in_certificate);
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ADD_TEST(test_one_sct_in_certificate);
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ADD_TEST(test_multiple_scts_in_certificate);
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ADD_TEST(test_decode_tls_sct);
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ADD_TEST(test_encode_tls_sct);
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result = run_tests(argv[0]);
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ERR_print_errors_fp(stderr);
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return result;
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}
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#else /* OPENSSL_NO_CT */
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int main(int argc, char* argv[])
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{
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return EXIT_SUCCESS;
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}
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#endif /* OPENSSL_NO_CT */
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