102 lines
2.6 KiB
C
102 lines
2.6 KiB
C
/*
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* Copyright (C) 2005-2006 Martin Willi
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* Copyright (C) 2005 Jan Hutter
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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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* $Id$
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*/
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/**
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* @defgroup randomizer randomizer
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* @{ @ingroup utils
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*/
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#ifndef RANDOMIZER_H_
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#define RANDOMIZER_H_
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typedef struct randomizer_t randomizer_t;
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#include <library.h>
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#ifndef DEV_RANDOM
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/**
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* Device to read real random bytes
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*/
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# define DEV_RANDOM "/dev/random"
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#endif
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#ifndef DEV_URANDOM
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/**
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* Device to read pseudo random bytes
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*/
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# define DEV_URANDOM "/dev/urandom"
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#endif
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/**
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* Class used to get random and pseudo random values.
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*/
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struct randomizer_t {
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/**
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* Reads a specific number of bytes from random device.
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*
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* @param bytes number of bytes to read
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* @param buffer pointer to buffer where to write the data in.
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* @return SUCCESS, or FAILED
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*/
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status_t (*get_random_bytes) (randomizer_t *this,
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size_t bytes, u_int8_t *buffer);
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/**
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* Allocates space and writes in random bytes.
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*
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* @param bytes number of bytes to allocate
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* @param chunk chunk which will hold the allocated random bytes
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* @return SUCCESS, or FAILED
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*/
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status_t (*allocate_random_bytes) (randomizer_t *this,
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size_t bytes, chunk_t *chunk);
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/**
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* Reads a specific number of bytes from pseudo random device.
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*
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* @param bytes number of bytes to read
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* @param buffer pointer to buffer where to write the data in.
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* @return SUCCESS, or FAILED
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*/
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status_t (*get_pseudo_random_bytes) (randomizer_t *this,size_t bytes, u_int8_t *buffer);
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/**
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* Allocates space and writes in pseudo random bytes.
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*
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* @param bytes number of bytes to allocate
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* @param chunk chunk which will hold the allocated random bytes
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* @return SUCCESS, or FAILED
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*/
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status_t (*allocate_pseudo_random_bytes) (randomizer_t *this, size_t bytes, chunk_t *chunk);
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/**
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* Destroys a randomizer_t object.
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*/
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void (*destroy) (randomizer_t *this);
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};
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/**
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* Creates a randomizer_t object.
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*
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* @return created randomizer_t
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*/
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randomizer_t *randomizer_create(void);
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#endif /*RANDOMIZER_H_ @} */
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