/*

 * Copyright (C) 2008-2016 Free Software Foundation, Inc.

 * Copyright (C) 2016 Red Hat, Inc.

 *

 * Author: Nikos Mavrogiannopoulos

 *

 * This file is part of GnuTLS.

 *

 * GnuTLS is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 3 of the License, or

 * (at your option) any later version.

 *

 * GnuTLS is distributed in the hope that it will be useful, but

 * WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with GnuTLS; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA

 */

#ifdef HAVE_CONFIG_H

#include <config.h>

#endif

#include <stdlib.h>

#include <stdio.h>

#include <time.h>

#include <string.h>

#include <gnutls/gnutls.h>

#include <gnutls/x509.h>

#include <assert.h>

#include "utils.h"

#include "cert-common.h"

static unsigned char saved_crt_pem[] =

	"-----BEGIN CERTIFICATE-----\n"

	"MIICWjCCAcOgAwIBAgIDChEAMA0GCSqGSIb3DQEBCwUAMCsxDjAMBgNVBAMTBW5p\n"

	"a29zMRkwFwYDVQQKExBub25lIHRvLCBtZW50aW9uMCAXDTA4MDMzMTIyMDAwMFoY\n"

	"Dzk5OTkxMjMxMjM1OTU5WjArMQ4wDAYDVQQDEwVuaWtvczEZMBcGA1UEChMQbm9u\n"

	"ZSB0bywgbWVudGlvbjCBnzANBgkqhkiG9w0BAQEFAAOBjQAwgYkCgYEAu2ZD9fLF\n"

	"17aMzMXf9Yg7sclLag6hrSBQQAiAoU9co9D4bM/mPPfsBHYTF4tkiSJbwN1TfDvt\n"

	"fAS7gLkovo6bxo6gpRLL9Vceoue7tzNJn+O7Sq5qTWj/yRHiMo3OPYALjXXv2ACB\n"

	"jygEA6AijWEEB/q2N30hB0nSCWFpmJCjWKkCAwEAAYEFAAABAgOCBQAEAwIBo3ww\n"

	"ejAMBgNVHRMBAf8EAjAAMA8GA1UdDwEB/wQFAwMHgAAwNwYDVR0RBDAwLogEKgME\n"

	"BYIReG4tLW14YWE0YXM2ZC5jb22BE3Rlc3RAeG4tLWt4YXdoay5vcmcwIAYDVR0l\n"

	"AQH/BBYwFAYIKwYBBQUHAwEGCCsGAQUFBwMCMA0GCSqGSIb3DQEBCwUAA4GBADzP\n"

	"piA0s50R+oM/OWcHrARRMFhmOv8oj4mQeXjePCUJub8CDj1XnZwseIY9K9IU6Lxm\n"

	"43p7kw1jFzPRBJyuZC5X92AdG1meR1RKd91M3VEvn2cgfesX7/MbhZIYJ8ZD2S1L\n"

	"rqzVabXTZjKdHT727mCJdqzjDh7CFmb9Q2ZU6jDR\n"

	"-----END CERTIFICATE-----\n";

const gnutls_datum_t saved_crt = { saved_crt_pem, sizeof(saved_crt_pem)-1 };

static void tls_log_func(int level, const char *str)

{

	fprintf(stderr, "|<%d>| %s", level, str);

}

static time_t mytime(time_t * t)

{

	time_t then = 1207000800;

	if (t)

		*t = then;

	return then;

}

#define REGISTERED_OID "1.2.3.4.5"

void doit(void)

{

	gnutls_x509_privkey_t pkey;

	gnutls_x509_crt_t crt;

	gnutls_x509_crt_t crt2;

	const char *err = NULL;

	unsigned char buf[64];

	unsigned char large_buf[5*1024];

	unsigned int status, san_type;

	gnutls_datum_t out;

	size_t s = 0, i;

	int ret;

	ret = global_init();

	if (ret < 0)

		fail("global_init\n");

	gnutls_global_set_time_function(mytime);

	gnutls_global_set_log_function(tls_log_func);

	if (debug)

		gnutls_global_set_log_level(4711);

	ret = gnutls_x509_crt_init(&crt;;

	if (ret != 0)

		fail("gnutls_x509_crt_init\n");

	ret = gnutls_x509_crt_init(&crt2);

	if (ret != 0)

		fail("gnutls_x509_crt_init\n");

	ret = gnutls_x509_crt_import(crt2, &server_ecc_cert, GNUTLS_X509_FMT_PEM);

	if (ret != 0)

		fail("gnutls_x509_crt_import\n");

	ret = gnutls_x509_privkey_init(&pkey);

	if (ret != 0)

		fail("gnutls_x509_privkey_init\n");

	ret = gnutls_x509_privkey_import(pkey, &key_dat, GNUTLS_X509_FMT_PEM);

	if (ret != 0)

		fail("gnutls_x509_privkey_import\n");

	/* Setup CRT */

	ret = gnutls_x509_crt_set_version(crt, 3);

	if (ret != 0)

		fail("gnutls_x509_crt_set_version\n");

	ret = gnutls_x509_crt_set_serial(crt, "\x0a\x11\x00", 3);

	if (ret != 0)

		fail("gnutls_x509_crt_set_serial\n");

	ret = gnutls_x509_crt_set_expiration_time(crt, -1);

	if (ret != 0)

		fail("error\n");

	ret = gnutls_x509_crt_set_activation_time(crt, mytime(0));

	if (ret != 0)

		fail("error\n");

	ret = gnutls_x509_crt_set_key(crt, pkey);

	if (ret != 0)

		fail("gnutls_x509_crt_set_key\n");

	ret = gnutls_x509_crt_set_basic_constraints(crt, 0, -1);

	if (ret < 0) {

		fail("error\n");

	}

	ret = gnutls_x509_crt_set_key_usage(crt, GNUTLS_KEY_DIGITAL_SIGNATURE);

	if (ret != 0)

		fail("gnutls_x509_crt_set_key_usage %d\n", ret);

	ret = gnutls_x509_crt_set_dn(crt, "o = none to\\, mention,cn = nikos", &err;;

	if (ret < 0) {

		fail("gnutls_x509_crt_set_dn: %s, %s\n", gnutls_strerror(ret), err);

	}

	ret = gnutls_x509_crt_set_subject_alt_name(crt, GNUTLS_SAN_DNSNAME,

						   "foo", 3, 1);

	if (ret != 0)

		fail("gnutls_x509_crt_set_subject_alt_name\n");

	ret = gnutls_x509_crt_set_subject_alt_name(crt, GNUTLS_SAN_RFC822NAME,

						   "foo@bar.org", strlen("foo@bar.org"), 1);

	if (ret != 0)

		fail("gnutls_x509_crt_set_subject_alt_name\n");

	ret = gnutls_x509_crt_set_subject_alt_name(crt, GNUTLS_SAN_RFC822NAME,

						   "ινβάλιντ@bar.org", strlen("ινβάλιντ@bar.org"), 1);

	if (ret != GNUTLS_E_INVALID_UTF8_EMAIL)

		fail("gnutls_x509_crt_set_subject_alt_name\n");

	ret = gnutls_x509_crt_set_subject_alt_name(crt, GNUTLS_SAN_IPADDRESS,

						   "\xc1\x5c\x96\x3", 4, 1);

	if (ret != 0)

		fail("gnutls_x509_crt_set_subject_alt_name\n");

	ret = gnutls_x509_crt_set_subject_alt_name(crt, GNUTLS_SAN_IPADDRESS,

						   "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01", 16, 1);

	if (ret != 0)

		fail("gnutls_x509_crt_set_subject_alt_name\n");

	ret = gnutls_x509_crt_set_subject_alt_name(crt, GNUTLS_SAN_DNSNAME,

						   "apa", 3, 0);

	if (ret != 0)

		fail("gnutls_x509_crt_set_subject_alt_name\n");

	ret = gnutls_x509_crt_set_subject_alt_name(crt, GNUTLS_SAN_REGISTERED_ID,

						   REGISTERED_OID, strlen(REGISTERED_OID), 0);

	if (ret != 0)

		fail("gnutls_x509_crt_set_subject_alt_name\n");

	ret = gnutls_x509_crt_set_subject_alt_name(crt, GNUTLS_SAN_DNSNAME,

						   "απαλό.com", strlen("απαλό.com"), 1);

#if defined(HAVE_LIBIDN2) || defined(HAVE_LIBIDN)

	if (ret != 0)

		fail("gnutls_x509_crt_set_subject_alt_name: %s\n", gnutls_strerror(ret));

	ret = gnutls_x509_crt_set_subject_alt_name(crt, GNUTLS_SAN_RFC822NAME,

						   "test@νίκο.org", strlen("test@νίκο.org"), 1);

	if (ret != 0)

		fail("gnutls_x509_crt_set_subject_alt_name\n");

#else

	if (ret != GNUTLS_E_UNIMPLEMENTED_FEATURE)

		fail("gnutls_x509_crt_set_subject_alt_name: %s\n", gnutls_strerror(ret));

#endif

	s = 0;

	ret = gnutls_x509_crt_get_key_purpose_oid(crt, 0, NULL, &s, NULL);

	if (ret != GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE)

		fail("gnutls_x509_crt_get_key_purpose_oid %d\n", ret);

	s = 0;

	ret =

	    gnutls_x509_crt_set_key_purpose_oid(crt,

						GNUTLS_KP_TLS_WWW_SERVER,

						0);

	if (ret != 0)

		fail("gnutls_x509_crt_set_key_purpose_oid %d\n", ret);

	s = 0;

	ret = gnutls_x509_crt_get_key_purpose_oid(crt, 0, NULL, &s, NULL);

	if (ret != GNUTLS_E_SHORT_MEMORY_BUFFER)

		fail("gnutls_x509_crt_get_key_purpose_oid %d\n", ret);

	s = 0;

	ret =

	    gnutls_x509_crt_set_key_purpose_oid(crt,

						GNUTLS_KP_TLS_WWW_CLIENT,

						1);

	if (ret != 0)

		fail("gnutls_x509_crt_set_key_purpose_oid2 %d\n", ret);

	/* in the end this will be ignored as the issuer will be set

	 * by gnutls_x509_crt_sign2() */

	ret = gnutls_x509_crt_set_issuer_dn(crt, "cn = my CA, o = big\\, and one", &err;;

	if (ret < 0) {

		fail("gnutls_x509_crt_set_issuer_dn: %s, %s\n", gnutls_strerror(ret), err);

	}

#define ISSUER_UNIQUE_ID "\x00\x01\x02\x03"

#define SUBJECT_UNIQUE_ID "\x04\x03\x02\x01"

	ret = gnutls_x509_crt_set_issuer_unique_id(crt, ISSUER_UNIQUE_ID, sizeof(ISSUER_UNIQUE_ID)-1);

	if (ret < 0)

		fail("error: %s\n", gnutls_strerror(ret));

	ret = gnutls_x509_crt_set_subject_unique_id(crt, SUBJECT_UNIQUE_ID, sizeof(SUBJECT_UNIQUE_ID)-1);

	if (ret < 0)

		fail("error: %s\n", gnutls_strerror(ret));

	/* Sign and finalize the certificate */

	ret = gnutls_x509_crt_sign2(crt, crt, pkey, GNUTLS_DIG_SHA256, 0);

	if (ret < 0)

		fail("gnutls_x509_crt_sign2: %s\n", gnutls_strerror(ret));

	ret = gnutls_x509_crt_print(crt, GNUTLS_CRT_PRINT_FULL, &out;;

	if (ret != 0)

		fail("gnutls_x509_crt_print\n");

	if (debug)

		printf("crt: %.*s\n", out.size, out.data);

	gnutls_free(out.data);

	/* Verify whether selected input is present */

	s = 0;

	ret = gnutls_x509_crt_get_extension_info(crt, 0, NULL, &s, NULL);

	if (ret != GNUTLS_E_SHORT_MEMORY_BUFFER)

		fail("gnutls_x509_crt_get_extension_info2: %s\n", strerror(ret));

	s = 0;

	ret = gnutls_x509_crt_get_extension_data(crt, 0, NULL, &s);

	if (ret != 0)

		fail("gnutls_x509_crt_get_extension_data: %s\n", strerror(ret));

	ret = gnutls_x509_crt_get_raw_issuer_dn(crt, &out;;

	if (ret < 0 || out.size == 0)

		fail("gnutls_x509_crt_get_raw_issuer_dn: %s\n", gnutls_strerror(ret));

	if (out.size != 45 ||

	    memcmp(out.data, "\x30\x2b\x31\x0e\x30\x0c\x06\x03\x55\x04\x03\x13\x05\x6e\x69\x6b\x6f\x73\x31\x19\x30\x17\x06\x03\x55\x04\x0a\x13\x10\x6e\x6f\x6e\x65\x20\x74\x6f\x2c\x20\x6d\x65\x6e\x74\x69\x6f\x6e", 45) != 0) {

		hexprint(out.data, out.size);

		fail("issuer DN comparison failed\n");

	}

	gnutls_free(out.data);

	s = sizeof(buf);

	ret = gnutls_x509_crt_get_issuer_unique_id(crt, (void*)buf, &s);

	if (ret < 0)

		fail("error: %s\n", gnutls_strerror(ret));

	if (s != sizeof(ISSUER_UNIQUE_ID)-1 ||

		memcmp(buf, ISSUER_UNIQUE_ID, s) != 0) {

		fail("issuer unique id comparison failed\n");

	}

	s = sizeof(buf);

	ret = gnutls_x509_crt_get_subject_unique_id(crt, (void*)buf, &s);

	if (ret < 0)

		fail("error: %s\n", gnutls_strerror(ret));

	if (s != sizeof(SUBJECT_UNIQUE_ID)-1 ||

		memcmp(buf, SUBJECT_UNIQUE_ID, s) != 0) {

		fail("subject unique id comparison failed\n");

	}

	ret = gnutls_x509_crt_get_raw_dn(crt, &out;;

	if (ret < 0 || out.size == 0)

		fail("gnutls_x509_crt_get_raw_dn: %s\n", gnutls_strerror(ret));

	if (out.size != 45 ||

	    memcmp(out.data, "\x30\x2b\x31\x0e\x30\x0c\x06\x03\x55\x04\x03\x13\x05\x6e\x69\x6b\x6f\x73\x31\x19\x30\x17\x06\x03\x55\x04\x0a\x13\x10\x6e\x6f\x6e\x65\x20\x74\x6f\x2c\x20\x6d\x65\x6e\x74\x69\x6f\x6e", 45) != 0) {

		fail("DN comparison failed\n");

	}

	gnutls_free(out.data);

	ret = gnutls_x509_crt_equals(crt, crt);

	if (ret == 0) {

		fail("equality test failed\n");

	}

	ret = gnutls_x509_crt_equals(crt, crt2);

	if (ret != 0) {

		fail("equality test failed\n");

	}

	ret = gnutls_x509_crt_verify(crt, &crt, 1, 0, &status);

	if (ret < 0) {

		fail("verification failed\n");

	}

	if (status != 0) {

		fail("verification status failed\n");

	}

	assert(gnutls_x509_crt_export2(crt, GNUTLS_X509_FMT_PEM, &out) >= 0);

	if (debug)

		fprintf(stderr, "%s\n", out.data);

#if defined(HAVE_LIBIDN2)

	assert(out.size == saved_crt.size);

	assert(memcmp(out.data, saved_crt.data, out.size)==0);

#endif

	/* test behavior of gnutls_x509_crt_export on varios corner cases */

	s = 0;

	assert(gnutls_x509_crt_export(crt, GNUTLS_X509_FMT_PEM, NULL, &s) == GNUTLS_E_SHORT_MEMORY_BUFFER);

	assert(s == out.size+1);

	s = sizeof(buf);

	assert(gnutls_x509_crt_export(crt, GNUTLS_X509_FMT_PEM, buf, &s) == GNUTLS_E_SHORT_MEMORY_BUFFER);

	assert(s == out.size+1);

	/* check whether the PEM output matches gnutls_x509_crt_export2 */

	s = sizeof(large_buf);

	assert(gnutls_x509_crt_export(crt, GNUTLS_X509_FMT_PEM, large_buf, &s) == 0);

	assert(s == out.size);

	assert(memcmp(large_buf, out.data, out.size) == 0);

	gnutls_free(out.data);

	/* check whether the der out length differs */

	s = sizeof(large_buf);

	assert(gnutls_x509_crt_export(crt, GNUTLS_X509_FMT_DER, large_buf, &s) == 0);

	assert(gnutls_x509_crt_export2(crt, GNUTLS_X509_FMT_DER, &out) >= 0);

	assert(s == out.size);

	assert(memcmp(large_buf, out.data, out.size) == 0);

	/* verify some values written in the original cert */

	gnutls_x509_crt_deinit(crt2);

	ret = gnutls_x509_crt_init(&crt2);

	if (ret != 0)

		fail("gnutls_x509_crt_init\n");

	ret = gnutls_x509_crt_import(crt2, &out, GNUTLS_X509_FMT_DER);

	if (ret != 0)

		fail("gnutls_x509_crt_import\n");

	i = 0;

	do {

		s = sizeof(buf);

		ret = gnutls_x509_crt_get_subject_alt_name2(crt2, i++, buf, &s, &san_type, NULL);

		if (ret < 0)

			fail("gnutls_x509_crt_get_subject_alt_name2: %s\n", gnutls_strerror(ret));

	} while (san_type != GNUTLS_SAN_REGISTERED_ID);

	assert(san_type == GNUTLS_SAN_REGISTERED_ID);

	assert(s == strlen(REGISTERED_OID));

	assert(memcmp(buf, REGISTERED_OID, s) == 0);

	gnutls_free(out.data);

	gnutls_x509_crt_deinit(crt);

	gnutls_x509_crt_deinit(crt2);

	gnutls_x509_privkey_deinit(pkey);

	gnutls_global_deinit();

}