96 lines
2.4 KiB
C
96 lines
2.4 KiB
C
/**
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* @file prf.h
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*
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* @brief Generic interface for pseudo-random-functions
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*
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*/
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/*
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* Copyright (C) 2005 Jan Hutter, Martin Willi
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* Hochschule fuer Technik Rapperswil
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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#ifndef PRF_H_
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#define PRF_H_
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#include "../../payloads/transform_substructure.h"
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/**
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* Object representing a diffie hellman exchange
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*/
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typedef struct prf_s prf_t;
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struct prf_s {
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/**
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* @brief generates pseudo random bytes and writes them
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* in the buffer
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*
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* @param this calling prf
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* @param seed a chunk containing the seed for the next bytes
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* @param [out]buffer pointer where the generated bytes will be written
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* @return
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* - SUCCESS in any case
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*/
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status_t (*get_bytes) (prf_t *this, chunk_t seed, u_int8_t *buffer);
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/**
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* @brief generates pseudo random bytes and allocate space for them
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*
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* @param this calling prf
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* @param seed a chunk containing the seed for the next bytes
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* @param [out]chunk chunk which will hold generated bytes
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* @return
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* - SUCCESS in any case
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* - OUT_OF_RES if space could not be allocated
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*/
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status_t (*allocate_bytes) (prf_t *this, chunk_t seed, chunk_t *chunk);
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/**
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* @brief get the block size of this prf
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*
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* @param this calling prf
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* @return block size in bytes
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*/
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size_t (*get_block_size) (prf_t *this);
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/**
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* @brief Set the key for this prf
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*
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* @param this calling prf
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* @return block size in bytes
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*/
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status_t (*set_key) (prf_t *this, chunk_t key);
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/**
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* @brief Destroys a prf object.
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*
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* @param this prf_t object to destroy
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* @return
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* SUCCESS in any case
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*/
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status_t (*destroy) (prf_t *this);
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};
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/**
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* Creates a new prf_t object
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*
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* @param pseudo_random_function Algorithm to use
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* @return
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* - prf_t if successfully
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* - NULL if out of ressources or prf not supported
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*/
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prf_t *prf_create(pseudo_random_function_t pseudo_random_function);
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#endif /*PRF_H_*/
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