/*
 * Copyright (C) 2006-2009 Martin Willi
 * HSR 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 psk_authenticator psk_authenticator
 * @{ @ingroup authenticators_v2
 */

#ifndef PSK_AUTHENTICATOR_H_
#define PSK_AUTHENTICATOR_H_

typedef struct psk_authenticator_t psk_authenticator_t;

#include <sa/authenticator.h>

/**
 * Implementation of authenticator_t using pre-shared keys.
 */
struct psk_authenticator_t {

	/**
	 * Implemented authenticator_t interface.
	 */
	authenticator_t authenticator;
};

/**
 * Create an authenticator to build PSK signatures.
 *
 * @param ike_sa			associated ike_sa
 * @param received_nonce	nonce received in IKE_SA_INIT
 * @param sent_init			sent IKE_SA_INIT message data
 * @param reserved			reserved bytes of ID payload
 * @return					PSK authenticator
 */
psk_authenticator_t *psk_authenticator_create_builder(ike_sa_t *ike_sa,
									chunk_t received_nonce, chunk_t sent_init,
									char reserved[3]);

/**
 * Create an authenticator to verify PSK signatures.
 *
 * @param ike_sa			associated ike_sa
 * @param sent_nonce		nonce sent in IKE_SA_INIT
 * @param received_init		received IKE_SA_INIT message data
 * @param reserved			reserved bytes of ID payload
 * @return					PSK authenticator
 */
psk_authenticator_t *psk_authenticator_create_verifier(ike_sa_t *ike_sa,
									chunk_t sent_nonce, chunk_t received_init,
									char reserved[3]);

#endif /** PSK_AUTHENTICATOR_H_ @}*/