/*

 * Copyright (C) 2010-2016 Free Software Foundation, Inc.

 * Copyright (C) 2015-2016 Red Hat, Inc.

 *

 * Author: Nikos Mavrogiannopoulos

 *

 * This file is part of GnuTLS.

 *

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

 * modify it under the terms of the GNU Lesser General Public License

 * as published by the Free Software Foundation; either version 2.1 of

 * the License, or (at your option) any later version.

 *

 * This library 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

 * Lesser 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/>

 *

 */

#include <config.h>

#include <system.h>

#include "gnutls_int.h"

#include "errors.h"

#include <sys/socket.h>

#include <errno.h>

#include <sys/stat.h>

#include <sys/types.h>

#include <time.h>

#ifdef _WIN32

# include <windows.h>

# include <wincrypt.h>

# if defined(NEED_CERT_ENUM_CRLS)

CertEnumCRLsInStoreFunc pCertEnumCRLsInStore;

static HMODULE Crypt32_dll;

# endif

#endif

/* System specific function wrappers for certificate stores.

 */

gnutls_time_func gnutls_time;

gnutls_gettime_func gnutls_gettime;

/* emulate gnulib's gettime using gettimeofday to avoid linking to

 * librt */

static void _gnutls_gettime(struct timespec *t)

{

#if defined(HAVE_CLOCK_GETTIME) && defined(CLOCK_REALTIME)

	clock_gettime(CLOCK_REALTIME, t);

#else

	struct timeval tv;

	gettimeofday(&tv, NULL);

	t->tv_sec = tv.tv_sec;

	t->tv_nsec = tv.tv_usec * 1000;

#endif

}

void _gnutls_global_set_gettime_function(gnutls_gettime_func gettime_func)

{

	gnutls_gettime = gettime_func;

}

int gnutls_system_global_init(void)

{

#if defined(_WIN32) && defined(NEED_CERT_ENUM_CRLS)

	/* used in system/certs.c */

	HMODULE crypto;

	crypto = LoadLibrary(TEXT("Crypt32.dll"));

	if (crypto == NULL)

		return GNUTLS_E_CRYPTO_INIT_FAILED;

	pCertEnumCRLsInStore =

	    (CertEnumCRLsInStoreFunc) GetProcAddress(crypto,

						      "CertEnumCRLsInStore");

	if (pCertEnumCRLsInStore == NULL) {

		FreeLibrary(crypto);

		return GNUTLS_E_CRYPTO_INIT_FAILED;

	}

	Crypt32_dll = crypto;

#endif

	gnutls_time = time;

	gnutls_gettime = _gnutls_gettime;

	return 0;

}

void gnutls_system_global_deinit(void)

{

#if defined(_WIN32) && defined(NEED_CERT_ENUM_CRLS)

	FreeLibrary(Crypt32_dll);

#endif

	gnutls_time = time;

	gnutls_gettime = _gnutls_gettime;

}