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Martin Willi
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/**
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* @file ike_sa.h
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*
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* @brief Class ike_sa_t. An object of this type is managed by an
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* ike_sa_manager_t object and represents an IKE_SA
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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 IKE_SA_H_
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#define IKE_SA_H_
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#include <types.h>
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#include <encoding/message.h>
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#include <sa/ike_sa_id.h>
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#include <utils/logger.h>
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#include <utils/randomizer.h>
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#include <sa/states/state.h>
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#include <transforms/prfs/prf.h>
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#include <transforms/crypters/crypter.h>
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#include <transforms/signers/signer.h>
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/**
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* Nonce size in bytes of all sent nonces
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*/
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#define NONCE_SIZE 16
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/**
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* @brief This class is used to represent an IKE_SA
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*
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*/
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typedef struct ike_sa_s ike_sa_t;
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struct ike_sa_s {
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/**
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* @brief Processes a incoming IKEv2-Message of type message_t
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*
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* @param this ike_sa_t object object
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* @param[in] message message_t object to process
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* @return SUCCESSFUL if succeeded, FAILED otherwise
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*/
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status_t (*process_message) (ike_sa_t *this,message_t *message);
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/**
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* Initiate a new connection with given configuration name
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*
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* @param this calling object
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* @param name name of the configuration
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* @return TODO
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*/
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status_t (*initialize_connection) (ike_sa_t *this, char *name);
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/**
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* @brief Get the id of the SA
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*
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* @param this ike_sa_t-message_t object object
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* @return ike_sa's ike_sa_id_t
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*/
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ike_sa_id_t* (*get_id) (ike_sa_t *this);
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/**
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* @brief Destroys a ike_sa_t object
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*
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* @param this ike_sa_t object
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* @return SUCCESSFUL if succeeded, FAILED otherwise
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*/
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status_t (*destroy) (ike_sa_t *this);
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};
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/**
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* Protected data of an ike_sa_t object
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*/
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typedef struct protected_ike_sa_s protected_ike_sa_t;
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struct protected_ike_sa_s {
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/**
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* Public part of a ike_sa_t object
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*/
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ike_sa_t public;
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/**
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* Builds an empty IKEv2-Message and fills in default informations.
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*
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* Depending on the type of message (request or response), the message id is
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* either message_id_out or message_id_in.
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*
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* Used in every state.
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*
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* @param this calling object
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* @param type exchange type of new message
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* @param request TRUE, if message has to be a request
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* @param message new message is stored at this location
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* @return
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* - SUCCESS
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* - OUT_OF_RES
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*/
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status_t (*build_message) (protected_ike_sa_t *this, exchange_type_t type, bool request, message_t **message);
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/**
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* Initiate a new connection with given configuration name
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*
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* @param this calling object
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* @param dh_shared_secret shared secret of diffie hellman exchange
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* @param initiator_nonce nonce of initiator
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* @param responder_nonce nonce of responder
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* @return TODO
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*/
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status_t (*compute_secrets) (protected_ike_sa_t *this,chunk_t dh_shared_secret,chunk_t initiator_nonce, chunk_t responder_nonce);
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/**
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* Creates a job to delete the given IKE_SA
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*/
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status_t (*create_delete_job) (protected_ike_sa_t *this);
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/**
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* Resends the last sent reply
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*/
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status_t (*resend_last_reply) (protected_ike_sa_t *this);
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/* protected values */
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/**
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* Identifier for the current IKE_SA
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*/
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ike_sa_id_t *ike_sa_id;
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/**
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* Linked List containing the child sa's of the current IKE_SA
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*/
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linked_list_t *child_sas;
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/**
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* Current state of the IKE_SA
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*/
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state_t *current_state;
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/**
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* this SA's source for random data
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*/
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randomizer_t *randomizer;
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/**
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* contains the last responded message
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*
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*/
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message_t *last_responded_message;
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/**
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* contains the last requested message
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*
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*/
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message_t *last_requested_message;
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/**
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* Informations of this host
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*/
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struct {
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host_t *host;
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} me;
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/**
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* Informations of the other host
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*/
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struct {
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host_t *host;
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} other;
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/**
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* Crypter object for initiator
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*/
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crypter_t *crypter_initiator;
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/**
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* Crypter object for responder
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*/
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crypter_t *crypter_responder;
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/**
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* Signer object for initiator
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*/
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signer_t *signer_initiator;
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/**
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* Signer object for responder
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*/
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signer_t *signer_responder;
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/**
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* prf function
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*/
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prf_t *prf;
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/**
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* Shared secrets
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*/
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struct {
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/**
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* Key used for deriving other keys
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*/
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chunk_t d_key;
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/**
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* Key for authenticate (initiator)
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*/
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chunk_t ai_key;
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/**
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* Key for authenticate (responder)
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*/
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chunk_t ar_key;
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/**
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* Key for encryption (initiator)
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*/
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chunk_t ei_key;
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/**
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* Key for encryption (responder)
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*/
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chunk_t er_key;
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/**
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* Key for generating auth payload (initiator)
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*/
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chunk_t pi_key;
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/**
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* Key for generating auth payload (responder)
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*/
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chunk_t pr_key;
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} secrets;
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/**
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* next message id to receive
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*/
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u_int32_t message_id_in;
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/**
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* next message id to send
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*/
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u_int32_t message_id_out;
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/**
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* a logger for this IKE_SA
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*/
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logger_t *logger;
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};
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/**
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* Creates an ike_sa_t object with a specific ike_sa_id_t object
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*
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* @param[in] ike_sa_id ike_sa_id_t object to associate with new IKE_SA.
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* The object is internal getting cloned
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* and so has to be destroyed by the caller.
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*
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* @warning the Content of internal ike_sa_id_t object can change over time
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* e.g. when a IKE_SA_INIT has been finished
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*
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* @return created ike_sa_t object
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*/
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ike_sa_t * ike_sa_create(ike_sa_id_t *ike_sa_id);
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#endif /*IKE_SA_H_*/
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