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/*
* Copyright (C) 2012 Adrian-Ken Rueegsegger
* 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 nonce_gen nonce_gen
* @{ @ingroup crypto
*/
#ifndef NONCE_GEN_H_
#define NONCE_GEN_H_
typedef struct nonce_gen_t nonce_gen_t;
#include <library.h>
/**
* Generic interface for nonce generators.
*/
struct nonce_gen_t {
/**
* Generates a nonce and writes it into the buffer.
*
* @param size size of nonce in bytes
* @param buffer pointer where the generated nonce will be written
* @return TRUE if nonce allocation was successful, FALSE otherwise
*/
bool (*get_nonce)(nonce_gen_t *this, size_t size,
uint8_t *buffer) __attribute__((warn_unused_result));
/**
* Generates a nonce and allocates space for it.
*
* @param size size of nonce in bytes
* @param chunk chunk which will hold the generated nonce
* @return TRUE if nonce allocation was successful, FALSE otherwise
*/
bool (*allocate_nonce)(nonce_gen_t *this, size_t size,
chunk_t *chunk) __attribute__((warn_unused_result));
/**
* Destroys a nonce generator object.
*/
void (*destroy)(nonce_gen_t *this);
};
#endif /** NONCE_GEN_H_ @}*/
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