/*
 * Copyright (C) 2001, 2003, 2004, 2005 Free Software Foundation
 *
 * Author: Nikos Mavroyanopoulos
 *
 * 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 library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
 * USA
 *
 */

/* Functions to return random bytes.
 */

#include <gnutls_int.h>
#include <gnutls_random.h>
#include <gnutls_errors.h>

/* fills the buffer 'res' with random bytes of 'bytes' long.
 * level is WEAK, STRONG, or VERY_STRONG (libgcrypt)
 */
int _gnutls_get_random(opaque * res, int bytes, int level)
{
    int err;

    switch (level) {
    case GNUTLS_WEAK_RANDOM:
	err = gc_nonce((char *) res, (size_t) bytes);
	break;

    case GNUTLS_STRONG_RANDOM:
	err = gc_pseudo_random((char *) res, (size_t) bytes);
	break;

    default:			/* GNUTLS_VERY_STRONG_RANDOM */
	err = gc_random((char *) res, (size_t) bytes);
	break;
    }

    if (err != GC_OK)
	return GNUTLS_E_RANDOM_FAILED;

    return GNUTLS_E_SUCCESS;
}