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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.
*
* $Id: ke_payload.h 5003 2009-03-24 17:43:01Z martin $
*/
/**
* @defgroup ke_payload ke_payload
* @{ @ingroup payloads
*/
#ifndef KE_PAYLOAD_H_
#define KE_PAYLOAD_H_
typedef struct ke_payload_t ke_payload_t;
#include <library.h>
#include <encoding/payloads/payload.h>
#include <encoding/payloads/transform_substructure.h>
#include <utils/linked_list.h>
#include <crypto/diffie_hellman.h>
/**
* KE payload length in bytes without any key exchange data.
*/
#define KE_PAYLOAD_HEADER_LENGTH 8
/**
* Class representing an IKEv2-KE Payload.
*
* The KE Payload format is described in RFC section 3.4.
*/
struct ke_payload_t {
/**
* The payload_t interface.
*/
payload_t payload_interface;
/**
* Returns the currently set key exchange data of this KE payload.
*
* @warning Returned data are not copied.
*
* @return chunk_t pointing to the value
*/
chunk_t (*get_key_exchange_data) (ke_payload_t *this);
/**
* Sets the key exchange data of this KE payload.
*
* Value is getting copied.
*
* @param key_exchange_data chunk_t pointing to the value to set
*/
void (*set_key_exchange_data) (ke_payload_t *this, chunk_t key_exchange_data);
/**
* Gets the Diffie-Hellman Group Number of this KE payload.
*
* @return DH Group Number of this payload
*/
diffie_hellman_group_t (*get_dh_group_number) (ke_payload_t *this);
/**
* Sets the Diffie-Hellman Group Number of this KE payload.
*
* @param dh_group_number DH Group to set
*/
void (*set_dh_group_number) (ke_payload_t *this,
diffie_hellman_group_t dh_group_number);
/**
* Destroys an ke_payload_t object.
*/
void (*destroy) (ke_payload_t *this);
};
/**
* Creates an empty ke_payload_t object
*
* @return ke_payload_t object
*/
ke_payload_t *ke_payload_create(void);
/**
* Creates a ke_payload_t from a diffie_hellman_t
*
* @param diffie_hellman diffie hellman object containing group and key
* @return ke_payload_t object
*/
ke_payload_t *ke_payload_create_from_diffie_hellman(
diffie_hellman_t *diffie_hellman);
#endif /** KE_PAYLOAD_H_ @}*/
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