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/*
* 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 library 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 <http://www.gnu.org/licenses/>
*
*/
/* The *BSD getentropy() system random generator. The simplest of all.
*/
#include "gnutls_int.h"
#include "errors.h"
#include <locks.h>
#include <num.h>
#include <errno.h>
#include <rnd-common.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#ifdef __APPLE__
#include <sys/random.h>
#endif
/* gnulib wants to claim strerror even if it cannot provide it. WTF */
#undef strerror
/* The POSIX (Linux-BSD) randomness gatherer.
*/
#include <time.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <fcntl.h>
get_entropy_func _rnd_get_system_entropy = NULL;
static int _rnd_get_system_entropy_simple(void* _rnd, size_t size)
{
if (getentropy(_rnd, size) < 0) {
int e = errno;
gnutls_assert();
_gnutls_debug_log
("Failed to use getentropy: %s\n",
strerror(e));
return GNUTLS_E_RANDOM_DEVICE_ERROR;
}
return 0;
}
int _rnd_system_entropy_init(void)
{
_rnd_get_system_entropy = _rnd_get_system_entropy_simple;
return 0;
}
int _rnd_system_entropy_check(void)
{
return 0;
}
void _rnd_system_entropy_deinit(void)
{
return;
}
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