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/*
* Copyright (C) 2006-2009 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.
*/
/**
* @defgroup eap_authenticator eap_authenticator
* @{ @ingroup authenticators
*/
#ifndef EAP_AUTHENTICATOR_H_
#define EAP_AUTHENTICATOR_H_
typedef struct eap_authenticator_t eap_authenticator_t;
#include <sa/authenticators/authenticator.h>
/**
* Implementation of authenticator_t using EAP authentication.
*
* Authentication using EAP involves the most complex authenticator. It stays
* alive over multiple ike_auth transactions and handles multiple EAP
* messages.
*
* @verbatim
ike_sa_init
------------------------->
<-------------------------
followed by multiple ike_auth:
+--------+ +--------+
| EAP | IDi, [IDr,] SA, TS | EAP |
| client | ---------------------------> | server |
| | ID, AUTH, EAP | |
| | <--------------------------- | |
| | EAP | |
| | ---------------------------> | |
| | EAP | |
| | <--------------------------- | |
| | EAP | |
| | ---------------------------> | |
| | EAP(SUCCESS) | |
| | <--------------------------- | |
| | AUTH | | If EAP establishes
| | ---------------------------> | | a session key, AUTH
| | AUTH, SA, TS | | payloads use this
| | <--------------------------- | | key, not SK_pi/pr
+--------+ +--------+
@endverbatim
*/
struct eap_authenticator_t {
/**
* Implemented authenticator_t interface.
*/
authenticator_t authenticator;
};
/**
* Create an authenticator to authenticate against an EAP server.
*
* @param ike_sa associated ike_sa
* @param received_nonce nonce received in IKE_SA_INIT
* @param sent_nonce nonce sent in IKE_SA_INIT
* @param received_init received IKE_SA_INIT message data
* @param sent_init sent IKE_SA_INIT message data
* @return EAP authenticator
*/
eap_authenticator_t *eap_authenticator_create_builder(ike_sa_t *ike_sa,
chunk_t received_nonce, chunk_t sent_nonce,
chunk_t received_init, chunk_t sent_init);
/**
* Create an authenticator to authenticate EAP clients.
*
* @param ike_sa associated ike_sa
* @param received_nonce nonce received in IKE_SA_INIT
* @param sent_nonce nonce sent in IKE_SA_INIT
* @param received_init received IKE_SA_INIT message data
* @param sent_init sent IKE_SA_INIT message data
* @return EAP authenticator
*/
eap_authenticator_t *eap_authenticator_create_verifier(ike_sa_t *ike_sa,
chunk_t received_nonce, chunk_t sent_nonce,
chunk_t received_init, chunk_t sent_init);
#endif /** EAP_AUTHENTICATOR_H_ @}*/
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