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/**
* @file crypter.h
*
* @brief Generic interface for encryption algorithms
*
*/
/*
* Copyright (C) 2005 Jan Hutter, Martin Willi
* 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.
*/
#ifndef CRYPTER_H_
#define CRYPTER_H_
#include "../../payloads/transform_substructure.h"
/**
* Object representing a crypter object
*/
typedef struct crypter_s crypter_t;
struct crypter_s {
/**
* @brief Encrypt a chunk of data and allocate space for
* the encrypted value.
*
* @param this calling crypter
* @param data data to encrypt
* @param [out]encrypted pointer where the encrypted bytes will be written
* @return
* - SUCCESS in any case
*/
status_t (*encrypt) (crypter_t *this, chunk_t data, chunk_t *encrypted);
/**
* @brief Decrypt a chunk of data and allocate space for
* the decrypted value.
*
* @param this calling crypter
* @param data data to decrypt
* @param [out]encrypted pointer where the decrypted bytes will be written
* @return
* - SUCCESS in any case
*/
status_t (*decrypt) (crypter_t *this, chunk_t data, chunk_t *decrypted);
/**
* @brief get the block size of this crypter
*
* @param this calling crypter
* @return block size in bytes
*/
size_t (*get_block_size) (crypter_t *this);
/**
* @brief Set the key for this crypter
*
* @param this calling crypter
* @return block size in bytes
*/
status_t (*set_key) (crypter_t *this, chunk_t key);
/**
* @brief Destroys a crypter object.
*
* @param this crypter_t object to destroy
* @return
* SUCCESS in any case
*/
status_t (*destroy) (crypter_t *this);
};
/**
* Creates a new crypter_t object
*
* @param pseudo_random_function Algorithm to use
* @return
* - crypter_t if successfully
* - NULL if out of ressources or crypter not supported
*/
crypter_t *crypter_create(encryption_algorithm_t encryption_algorithm);
#endif /*CRYPTER_H_*/
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