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/*
* Copyright (C) 2005-2006 Martin Willi
* Copyright (C) 2005 Jan Hutter
* 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 transform_substructure transform_substructure
* @{ @ingroup payloads
*/
#ifndef TRANSFORM_SUBSTRUCTURE_H_
#define TRANSFORM_SUBSTRUCTURE_H_
typedef struct transform_substructure_t transform_substructure_t;
#include <library.h>
#include <encoding/payloads/payload.h>
#include <encoding/payloads/transform_attribute.h>
#include <utils/linked_list.h>
#include <crypto/diffie_hellman.h>
#include <crypto/signers/signer.h>
#include <crypto/prfs/prf.h>
#include <crypto/crypters/crypter.h>
#include <config/proposal.h>
/**
* IKEv1 Value for a transform payload.
*/
#define TRANSFORM_TYPE_VALUE 3
/**
* Length of the transform substructure header in bytes.
*/
#define TRANSFORM_SUBSTRUCTURE_HEADER_LENGTH 8
/**
* Class representing an IKEv2- TRANSFORM SUBSTRUCTURE.
*
* The TRANSFORM SUBSTRUCTURE format is described in RFC section 3.3.2.
*/
struct transform_substructure_t {
/**
* The payload_t interface.
*/
payload_t payload_interface;
/**
* Adds a transform_attribute_t object to this object.
*
* @param proposal transform_attribute_t object to add
*/
void (*add_transform_attribute) (transform_substructure_t *this,
transform_attribute_t *attribute);
/**
* Sets the next_payload field of this substructure
*
* If this is the last transform, next payload field is set to 0,
* otherwise to 3
*
* @param is_last When TRUE, next payload field is set to 0, otherwise to 3
*/
void (*set_is_last_transform) (transform_substructure_t *this, bool is_last);
/**
* get transform type of the current transform.
*
* @return Transform type of current transform substructure.
*/
u_int8_t (*get_transform_type) (transform_substructure_t *this);
/**
* Get transform id of the current transform.
*
* @return Transform id of current transform substructure.
*/
u_int16_t (*get_transform_id) (transform_substructure_t *this);
/**
* Get transform id of the current transform.
*
* @param key_length The key length is written to this location
* @return
* - SUCCESS if a key length attribute is contained
* - FAILED if no key length attribute is part of this
* transform or key length uses more then 16 bit!
*/
status_t (*get_key_length) (transform_substructure_t *this,
u_int16_t *key_length);
/**
* Destroys an transform_substructure_t object.
*/
void (*destroy) (transform_substructure_t *this);
};
/**
* Creates an empty transform_substructure_t object.
*
* @return created transform_substructure_t object
*/
transform_substructure_t *transform_substructure_create(void);
/**
* Creates an empty transform_substructure_t object.
*
* @param type type of transform to create
* @param id transform id specifc for the transform type
* @param key_length key length for key lenght attribute, 0 to omit
* @return transform_substructure_t object
*/
transform_substructure_t *transform_substructure_create_type(
transform_type_t type, u_int16_t id, u_int16_t key_length);
#endif /** TRANSFORM_SUBSTRUCTURE_H_ @}*/
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