/*

 * Copyright (C) 2008-2012 Free Software Foundation, Inc.

 * Copyright (C) 2017 Red Hat, Inc.

 *

 * Author: David Marín Carreño

 *

 * 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 Lesser General Public License

 * along with this program.  If not, see <https://www.gnu.org/licenses/>

 */

#ifdef HAVE_CONFIG_H

#include <config.h>

#endif

#include <stdlib.h>

#include <stdio.h>

#include <string.h>

#include <gnutls/gnutls.h>

#include <gnutls/x509.h>

#include <gnutls/abstract.h>

#include <assert.h>

#include "utils.h"

#define MAX_TRIES 2

/* This tests the key generation, as well as the sign/verification

 * functionality of the supported public key algorithms.

 */

static int sec_param[MAX_TRIES] =

#ifdef ENABLE_FIPS140

    { GNUTLS_SEC_PARAM_MEDIUM, GNUTLS_SEC_PARAM_HIGH };

#else

    { GNUTLS_SEC_PARAM_LOW, GNUTLS_SEC_PARAM_MEDIUM };

#endif

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

{

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

}

const gnutls_datum_t raw_data = {

	(void *) "hello there",

	11

};

static void sign_verify_data(gnutls_pk_algorithm_t algorithm, gnutls_x509_privkey_t pkey)

{

	int ret;

	gnutls_privkey_t privkey;

	gnutls_pubkey_t pubkey;

	gnutls_datum_t signature;

	gnutls_digest_algorithm_t digest;

	assert(gnutls_privkey_init(&privkey) >= 0);

	ret = gnutls_privkey_import_x509(privkey, pkey, 0);

	if (ret < 0)

		fail("gnutls_privkey_import_x509\n");

	assert(gnutls_pubkey_init(&pubkey) >= 0);

	ret = gnutls_pubkey_import_privkey(pubkey, privkey, 0, 0);

	if (ret < 0)

		fail("gnutls_pubkey_import_privkey\n");

	ret = gnutls_pubkey_get_preferred_hash_algorithm (pubkey, &digest, NULL);

	if (ret < 0)

		fail("gnutls_pubkey_get_preferred_hash_algorithm\n");

	/* sign arbitrary data */

	ret = gnutls_privkey_sign_data(privkey, digest, 0,

					&raw_data, &signature);

	if (ret < 0)

		fail("gnutls_privkey_sign_data\n");

	/* verify data */

	ret = gnutls_pubkey_verify_data2(pubkey, gnutls_pk_to_sign(gnutls_pubkey_get_pk_algorithm(pubkey, NULL),digest),

				0, &raw_data, &signature);

	if (ret < 0)

		fail("gnutls_pubkey_verify_data2\n");

	gnutls_pubkey_deinit(pubkey);

	gnutls_privkey_deinit(privkey);

	gnutls_free(signature.data);

}

void doit(void)

{

	gnutls_x509_privkey_t pkey, dst;

	int ret, algorithm, i;

	ret = global_init();

	if (ret < 0)

		fail("global_init: %d\n", ret);

	gnutls_global_set_log_function(tls_log_func);

	if (debug)

		gnutls_global_set_log_level(4711);

	for (i = 0; i < MAX_TRIES; i++) {

		for (algorithm = GNUTLS_PK_RSA; algorithm <= GNUTLS_PK_MAX;

		     algorithm++) {

			if (algorithm == GNUTLS_PK_DH ||

			    algorithm == GNUTLS_PK_ECDH_X25519 ||

			    algorithm == GNUTLS_PK_ECDH_X448)

				continue;

			if (algorithm == GNUTLS_PK_GOST_01 ||

			    algorithm == GNUTLS_PK_GOST_12_256 ||

			    algorithm == GNUTLS_PK_GOST_12_512) {

				/* Skip GOST algorithms:

				 * - If they are disabled by ./configure option

				 * - Or in FIPS140 mode

				 */

#ifdef ENABLE_GOST

				if (gnutls_fips140_mode_enabled())

					continue;

#else

				continue;

#endif

			}

			ret = gnutls_x509_privkey_init(&pkey);

			if (ret < 0) {

				fail("gnutls_x509_privkey_init: %d\n",

				     ret);

			}

			ret = gnutls_x509_privkey_init(&dst);

			if (ret < 0) {

				fail("gnutls_x509_privkey_init: %d\n",

				     ret);

			}

			ret =

			    gnutls_x509_privkey_generate(pkey, algorithm,

							 gnutls_sec_param_to_pk_bits

							 (algorithm,

							  sec_param[i]),

							 0);

			if (ret < 0) {

				fail("gnutls_x509_privkey_generate (%s-%d): %s (%d)\n", gnutls_pk_algorithm_get_name(algorithm),

					gnutls_sec_param_to_pk_bits(algorithm,sec_param[i]), gnutls_strerror(ret), ret);

			} else if (debug) {

				success("Key[%s] generation ok: %d\n",

					gnutls_pk_algorithm_get_name

					(algorithm), ret);

			}

			ret = gnutls_x509_privkey_verify_params(pkey);

			if (ret < 0) {

				fail("gnutls_x509_privkey_generate (%s): %s (%d)\n", gnutls_pk_algorithm_get_name(algorithm), gnutls_strerror(ret), ret);

			}

			/* include test of cpy */

			ret = gnutls_x509_privkey_cpy(dst, pkey);

			if (ret < 0) {

				fail("gnutls_x509_privkey_cpy (%s): %s (%d)\n", gnutls_pk_algorithm_get_name(algorithm), gnutls_strerror(ret), ret);

			}

			ret = gnutls_x509_privkey_verify_params(pkey);

			if (ret < 0) {

				fail("gnutls_x509_privkey_generate after cpy (%s): %s (%d)\n", gnutls_pk_algorithm_get_name(algorithm), gnutls_strerror(ret), ret);

			}

			sign_verify_data(algorithm, pkey);

			sign_verify_data(algorithm, dst);

			gnutls_x509_privkey_deinit(pkey);

			gnutls_x509_privkey_deinit(dst);

			success("Generated key with %s-%d\n", gnutls_pk_algorithm_get_name(algorithm), gnutls_sec_param_to_pk_bits(algorithm,sec_param[i]));

		}

	}

	gnutls_global_deinit();

}