96 lines
2.5 KiB
C
96 lines
2.5 KiB
C
/**
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* @file crypter.h
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*
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* @brief Generic interface for encryption algorithms
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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 CRYPTER_H_
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#define CRYPTER_H_
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#include "../../payloads/transform_substructure.h"
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/**
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* Object representing a crypter object
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*/
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typedef struct crypter_s crypter_t;
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struct crypter_s {
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/**
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* @brief Encrypt a chunk of data and allocate space for
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* the encrypted value.
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*
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* @param this calling crypter
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* @param data data to encrypt
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* @param [out]encrypted pointer where the encrypted 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 (*encrypt) (crypter_t *this, chunk_t data, chunk_t *encrypted);
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/**
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* @brief Decrypt a chunk of data and allocate space for
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* the decrypted value.
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*
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* @param this calling crypter
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* @param data data to decrypt
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* @param [out]encrypted pointer where the decrypted 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 (*decrypt) (crypter_t *this, chunk_t data, chunk_t *decrypted);
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/**
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* @brief get the block size of this crypter
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*
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* @param this calling crypter
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* @return block size in bytes
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*/
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size_t (*get_block_size) (crypter_t *this);
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/**
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* @brief Set the key for this crypter
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*
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* @param this calling crypter
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* @return block size in bytes
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*/
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status_t (*set_key) (crypter_t *this, chunk_t key);
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/**
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* @brief Destroys a crypter object.
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*
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* @param this crypter_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) (crypter_t *this);
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};
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/**
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* Creates a new crypter_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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* - crypter_t if successfully
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* - NULL if out of ressources or crypter not supported
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*/
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crypter_t *crypter_create(encryption_algorithm_t encryption_algorithm);
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#endif /*CRYPTER_H_*/
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