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/*
* Copyright (C) 2006-2008 Martin Willi
* HSR Hochschule fuer Technik Rapperswil
*
* 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. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* 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.
*/
/**
* @defgroup fips_prf fips_prf
* @{ @ingroup fips_prf_p
*/
#ifndef FIPS_PRF_H_
#define FIPS_PRF_H_
typedef struct fips_prf_t fips_prf_t;
#include <library.h>
#include <crypto/prfs/prf.h>
#include <crypto/hashers/hasher.h>
/**
* Implementation of prf_t using the FIPS 186-2-change1 standard.
*
* FIPS defines a "General Purpose Random Number Generator" (Revised
* Algorithm for Computing m values of x (Appendix 3.1 of FIPS 186-2)). This
* implementation is not intended for private key generation and therefore does
* not include the "mod q" operation (see FIPS 186-2-change1 p74).
* The FIPS PRF is stateful; the key changes every time when bytes are acquired.
*/
struct fips_prf_t {
/**
* Generic prf_t interface for this fips_prf_t class.
*/
prf_t prf_interface;
};
/**
* Creates a new fips_prf_t object.
*
* FIPS 186-2 defines G() functions used in the PRF function. It can
* be implemented either based on SHA1 or DES.
* The G() function is selected using the algo parameter.
*
* @param algo specific FIPS PRF implementation, specifies G() function
* @return fips_prf_t object, NULL if not supported.
*/
fips_prf_t *fips_prf_create(pseudo_random_function_t algo);
#endif /** FIPS_PRF_H_ @}*/
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