/*
 * Copyright (c) 1998, 1999, 2000, 2001, 2002 Virtual Unlimited B.V.
 *
 * This 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

/*!\file fips186.h
 * \brief FIPS-186 pseudo-random number generator, headers.
 * \author Bob Deblier <bob.deblier@pandora.be>
 * \ingroup PRNG_m PRNG_fips186_m
 */

#ifndef _FIPS186_H
#define _FIPS186_H

#include "beecrypt/beecrypt.h"

#ifdef _REENTRANT
# if WIN32
#  include <windows.h>
#  include <winbase.h>
# endif
#endif

#include "beecrypt.h"
#include "sha1.h"

#if (MP_WBITS == 64)
# define FIPS186_STATE_SIZE	8
#elif (MP_WBITS == 32)
# define FIPS186_STATE_SIZE	16
#else
# error
#endif

/*!\ingroup PRNG_fips186_m
 */
#ifdef __cplusplus
struct BEECRYPTAPI fips186Param
#else
struct _fips186Param
#endif
{
	#ifdef _REENTRANT
	bc_mutex_t		lock;
	#endif
	sha1Param		param;
	mpw			state[FIPS186_STATE_SIZE];
	byte			digest[20];
	unsigned char	digestremain;
};

#ifndef __cplusplus
typedef struct _fips186Param fips186Param;
#endif

#ifdef __cplusplus
extern "C" {
#endif

extern BEECRYPTAPI const randomGenerator fips186prng;

BEECRYPTAPI
int fips186Setup  (fips186Param*);
BEECRYPTAPI
int fips186Seed   (fips186Param*, const byte*, size_t);
BEECRYPTAPI
int fips186Next   (fips186Param*, byte*, size_t);
BEECRYPTAPI
int fips186Cleanup(fips186Param*);

#ifdef __cplusplus
}
#endif

#endif