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/*
* Copyright (C) 2008, 2010 Free Software Foundation, 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 library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA
*
*/
/* This file handles all the internal functions that cope with random data.
*/
#include <gnutls_int.h>
#include <gnutls_errors.h>
#include <random.h>
static void *rnd_ctx;
int
_gnutls_rnd_init (void)
{
if (_gnutls_rnd_ops.init != NULL)
{
if (_gnutls_rnd_ops.init (&rnd_ctx) < 0)
{
gnutls_assert ();
return GNUTLS_E_RANDOM_FAILED;
}
}
return 0;
}
void
_gnutls_rnd_deinit (void)
{
if (_gnutls_rnd_ops.deinit != NULL)
{
_gnutls_rnd_ops.deinit (rnd_ctx);
}
return;
}
/**
* gnutls_rnd:
* @level: a security level
* @data: place to store random bytes
* @len: The requested size
*
* This function will generate random data and store it
* to output buffer.
*
* Returns: Zero or a negative value on error.
*
**/
int
gnutls_rnd (gnutls_rnd_level_t level, void *data, size_t len)
{
if (len > 0)
{
return _gnutls_rnd_ops.rnd (rnd_ctx, level, data, len);
}
return 0;
}
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