/*

 * Copyright (C) 2017 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 <stdio.h>

#include <stdlib.h>

#include <stdint.h>

#include <string.h>

#include <errno.h>

#include <gnutls/gnutls.h>

#include <gnutls/crypto.h>

#include <signal.h>

#include <unistd.h>

#ifndef _WIN32

# include <netinet/in.h>

# include <sys/types.h>

# include <sys/socket.h>

# include <sys/wait.h>

# include <pthread.h>

#endif

#include "utils.h"

#ifdef _WIN32

void doit(void)

{

	exit(77);

}

#else

/* Tests whether we can use gnutls_fips140_set_mode() and

 * gnutls_fips140_mode_enabled() under mutliple threads.

 */

typedef struct thread_data_st {

	unsigned mode;

	unsigned set_mode;

	int line;

	pthread_t id;

} thread_data_st;

static void *test_set_per_thread(void *arg)

{

	thread_data_st *data = arg;

	unsigned mode;

	int ret;

	unsigned char digest[20];

	mode = gnutls_fips140_mode_enabled();

	if (mode != data->mode)

		fail("%d: gnutls_fips140_mode_enabled: wrong mode returned (%d, exp: %d)\n", data->line, mode, data->mode);

	if (data->set_mode)

		gnutls_fips140_set_mode(data->set_mode, GNUTLS_FIPS140_SET_MODE_THREAD);

	mode = gnutls_fips140_mode_enabled();

	if (mode != data->set_mode) {

		fail("%d: gnutls_fips140_mode_enabled: wrong mode returned after set (%d, exp: %d)\n", data->line, mode, data->set_mode);

	}

	/* reset mode */

	gnutls_fips140_set_mode(data->mode, GNUTLS_FIPS140_SET_MODE_THREAD);

	mode = gnutls_fips140_mode_enabled();

	if (mode != data->mode)

		fail("%d: gnutls_fips140_mode_enabled: wrong mode returned after set (%d, exp: %d)\n", data->line, mode, data->mode);

	ret = gnutls_hmac_fast(GNUTLS_MAC_MD5, "keykeykey", 9, "abcdefgh",

			       8, digest);

	if (mode == GNUTLS_FIPS140_STRICT && ret >= 0) {

		fail("gnutls_hmac_fast(MD5): succeeded in strict mode!\n");

	} else if (mode != GNUTLS_FIPS140_STRICT && ret < 0) {

		fail("gnutls_hmac_fast(MD5): failed in non-strict mode!\n");

	}

	/* put to a random state */

	gnutls_fips140_set_mode(data->set_mode, GNUTLS_FIPS140_SET_MODE_THREAD);

	pthread_exit(0);

}

#define MAX_THREADS 48

void doit(void)

{

	int ret;

	thread_data_st *data;

	unsigned i, j;

	unsigned mode;

	signal(SIGPIPE, SIG_IGN);

	mode = gnutls_fips140_mode_enabled();

	if (mode == 0) {

		success("We are not in FIPS140 mode\n");

		exit(77);

	}

	data = calloc(1, sizeof(thread_data_st)*MAX_THREADS);

	if (data == NULL)

		abort();

	success("starting threads\n");

	/* Test if changes per thread apply, and whether the global

	 * setting will remain the same */

	for (i=0;i

		data[i].line = __LINE__;

		data[i].mode = mode;

		j = i%3;

		if (j==0)

			data[i].set_mode = GNUTLS_FIPS140_LAX;

		else if (j==1)

			data[i].set_mode = GNUTLS_FIPS140_LOG;

		else

			data[i].set_mode = GNUTLS_FIPS140_STRICT;

		ret = pthread_create(&data[i].id, NULL, test_set_per_thread, &data[i]);

		if (ret != 0) {

			abort();

		}

	}

	success("waiting for threads to finish\n");

	for (i=0;i

		ret = pthread_join(data[i].id, NULL);

		if (ret != 0)

			abort();

	}

	success("checking main process mode\n");

	/* main thread should be in the same state */

	if (mode != gnutls_fips140_mode_enabled())

		fail("gnutls_fips140_mode_enabled: main thread changed mode (%d, exp: %d)\n", gnutls_fips140_mode_enabled(), mode);

	success("checking whether global changes are seen in threads\n");

	/* Test if changes globally are visible in threads */

	mode = GNUTLS_FIPS140_LOG;

	gnutls_fips140_set_mode(mode, 0);

	for (i=0;i

		data[i].line = __LINE__;

		data[i].mode = mode;

		data[i].set_mode = GNUTLS_FIPS140_LAX;

		ret = pthread_create(&data[i].id, NULL, test_set_per_thread, &data[i]);

		if (ret != 0)

			abort();

	}

	success("waiting for threads to finish\n");

	for (i=0;i

		ret = pthread_join(data[i].id, NULL);

		if (ret != 0)

			abort();

	}

	if (mode != gnutls_fips140_mode_enabled())

		fail("gnutls_fips140_mode_enabled: main thread changed mode (%d, exp: %d)\n", gnutls_fips140_mode_enabled(), mode);

	gnutls_fips140_set_mode(GNUTLS_FIPS140_SELFTESTS, 0);

	if (GNUTLS_FIPS140_SELFTESTS == gnutls_fips140_mode_enabled())

		fail("gnutls_fips140_mode_enabled: setting to GNUTLS_FIPS140_SELFTESTS succeeded!\n");

	free(data);

}

#endif				/* _WIN32 */