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/**
* @file encryption_payload.h
*
* @brief Interface of encryption_payload_t.
*/
/*
* 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 ENCRYPTION_PAYLOAD_H_
#define ENCRYPTION_PAYLOAD_H_
#include <types.h>
#include <transforms/crypters/crypter.h>
#include <transforms/signers/signer.h>
#include <encoding/payloads/payload.h>
#include <utils/linked_list.h>
/**
* Encrpytion payload length in bytes without IV and following data.
*/
#define ENCRYPTION_PAYLOAD_HEADER_LENGTH 4
typedef struct encryption_payload_t encryption_payload_t;
/**
* @brief The encryption payload as described in RFC section 3.14.
*
* @ingroup payloads
*/
struct encryption_payload_t {
/**
* Implements payload_t interface.
*/
payload_t payload_interface;
/**
* @brief Creates an iterator for all contained payloads.
*
* @warning iterator_t object has to get destroyed by the caller.
*
* @param this calling encryption_payload_t object
* @param[in] forward iterator direction (TRUE: front to end)
* return created iterator_t object
*/
iterator_t *(*create_payload_iterator) (encryption_payload_t *this, bool forward);
/**
* @brief Adds a payload to this encryption payload.
*
* @param this calling encryption_payload_t object
* @param payload payload_t object to add
*/
void (*add_payload) (encryption_payload_t *this, payload_t *payload);
/**
* @brief Decrypt and return contained data.
*
* Decrypt the contained data (encoded payloads) using supplied crypter.
*
* @param this calling encryption_payload_t
* @param crypter crypter_t to use for data decryption
* @param[out]data resulting data in decrypted and unpadded form
* @return
* - SUCCESS, or
* - FAILED if crypter does not match data
*/
void (*set_signer) (encryption_payload_t *this, signer_t *signer);
status_t (*encrypt) (encryption_payload_t *this, crypter_t *crypter);
status_t (*decrypt) (encryption_payload_t *this, crypter_t *crypter);
status_t (*build_signature) (encryption_payload_t *this, chunk_t data);
status_t (*verify_signature) (encryption_payload_t *this, chunk_t data);
/**
* @brief Destroys an encryption_payload_t object.
*
* @param this encryption_payload_t object to destroy
*/
void (*destroy) (encryption_payload_t *this);
};
/**
* @brief Creates an empty encryption_payload_t object.
*
* @return created encryption_payload_t object
*
* @ingroup payloads
*/
encryption_payload_t *encryption_payload_create();
#endif /*ENCRYPTION_PAYLOAD_H_*/
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