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/**
* \file havege.h
*
* \brief HAVEGE: HArdware Volatile Entropy Gathering and Expansion
*
* Copyright (C) 2006-2010, Brainspark B.V.
*
* This file is part of PolarSSL (http://www.polarssl.org)
* Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
*
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef POLARSSL_HAVEGE_H
#define POLARSSL_HAVEGE_H
#include <string.h>
#define COLLECT_SIZE 1024
/**
* \brief HAVEGE state structure
*/
typedef struct
{
int PT1, PT2, offset[2];
int pool[COLLECT_SIZE];
int WALK[8192];
}
havege_state;
#ifdef __cplusplus
extern "C" {
#endif
/**
* \brief HAVEGE initialization
*
* \param hs HAVEGE state to be initialized
*/
void havege_init( havege_state *hs );
/**
* \brief HAVEGE rand function
*
* \param p_rng A HAVEGE state
* \param output Buffer to fill
* \param len Length of buffer
*
* \return 0
*/
int havege_random( void *p_rng, unsigned char *output, size_t len );
#ifdef __cplusplus
}
#endif
#endif /* havege.h */
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