/*

* Copyright (c) 2001-2006 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:  EAP and WLAN authentication protocols.

*

*/

/*

*/

#if !defined(_ABS_EAPOL_KEY_STATE_H_)

#define _ABS_EAPOL_KEY_STATE_H_

#include "eap_am_export.h"

class eapol_session_key_c;

/// This class defines the interface the eapol_key_state_c class

/// will use with the partner class (lower layer).

class EAP_EXPORT abs_eapol_key_state_c

{

private:

	//--------------------------------------------------

	//--------------------------------------------------

protected:

	//--------------------------------------------------

	//--------------------------------------------------

public:

	//--------------------------------------------------

	/**

	 * The destructor of the abs_eap_core class does nothing special.

	 */

	virtual ~abs_eapol_key_state_c()

	{

	}

	/**

	 * The constructor of the abs_eap_core class does nothing special.

	 */

	abs_eapol_key_state_c()

	{

	}

	/**

	 * A eapol_key_state_c object calls this function when

	 * a new temporary key (PTK, GTK or STAKey) is generated.

	 */

	virtual eap_status_e packet_data_session_key(

		const eap_am_network_id_c * const receive_network_id,

		const eapol_session_key_c * const key

		) = 0;

	/**

	 * The read_configure() function reads the configuration data identified

	 * by the field string of field_length bytes length. Adaptation module must direct

	 * the query to some persistent store.

	 * @see abs_eap_base_type_c::read_configure().

	 */

	virtual eap_status_e read_configure(

		const eap_configuration_field_c * const field,

		eap_variable_data_c * const data) = 0;

	/**

	 * The write_configure() function writes the configuration data identified

	 * by the field string of field_length bytes length. Adaptation module must direct

	 * the action to some persistent store.

	 * @see abs_eap_base_type_c::write_configure().

	 */

	virtual eap_status_e write_configure(

		const eap_configuration_field_c * const field,

		eap_variable_data_c * const data) = 0;

	/**

	 * This is notification of internal state transition.

	 * This is used for notifications, debugging and protocol testing.

	 * The primal notifications are eap_state_variable_e::eap_state_authentication_finished_successfully

	 * and eap_state_variable_e::eap_state_authentication_terminated_unsuccessfully.

	 * These two notifications are sent from EAP-protocol layer (eap_protocol_layer_e::eap_protocol_layer_eap).

	 * These two notifications tells the end state of authentication session. These are the only

	 * reliable indications of the final status of authentication session.

	 * You MUST NOT make decision based on the return value of abs_eap_stack_interface_c::packet_process().

	 */

	virtual void state_notification(

		const abs_eap_state_notification_c * const state) = 0;

	/**

	 * The set_timer() function initializes timer to be elapsed after time_ms milliseconds.

	 * @param initializer is pointer to object which timer_expired() function will

	 * be called after timer elapses.

	 * @param id is identifier which will be returned in timer_expired() function.

	 * The user selects and interprets the id for this timer.

	 * @param data is pointer to any user selected data which will be returned in timer_expired() function.

	 * @param time_ms is the time of timer in milli seconds.

	 *

	 * Adaptation module internally implements the timer.

	 */

	virtual eap_status_e set_timer(

		abs_eap_base_timer_c * const initializer, 

		const u32_t id, 

		void * const data,

		const u32_t time_ms) = 0;

	/**

	 * The cancel_timer() function cancels the timer id initiated by initializer.

	 * @param initializer is pointer to object which set the cancelled timer.

	 * @param id is identifier which will be returned in timer_expired() function.

	 * The user selects and interprets the id for this timer.

	 *

	 * Adaptation module internally implements the timer.

	 */

	virtual eap_status_e cancel_timer(

		abs_eap_base_timer_c * const initializer, 

		const u32_t id) = 0;

	/**

	 * All STAs contain a global Key Counter which is 256 bits in size.

	 * It should be initialized at system boot up time to a fresh cryptographic quality random number.

	 * Refer to Annex I.9 on random number generation. It is recommended that the counter value is initialized to:

	 * PRF-256(Random number, "Init Counter", Local MAC Address || Time)

	 * The Local MAC Address should be AA on the Authenticator and SA on the Supplicant.

	 * The random number is 256 bits in size. Time should be the current time

	 * (from NTP or another time in NTP format) whenever possible. 

	 * This initialization is to ensure that different initial Key Counter 

	 * values occur across system restarts whether a real-time clock is available or not.

	 * The Key Counter must be incremented (all 256 bits) each time a value is used as a nonce or IV.

	 * The Key Counter must not be allowed to wrap to the initialization value.

	 */

	virtual eap_status_e get_and_increment_global_key_counter(

		eap_variable_data_c * const key_counter) = 0;

	/**

	 * This function tells lower layer to remove EAPOL-Key Handshake session object asynchronously.

	 * @param send_netword_id carries the send addresses (network identity).

	 */

	virtual eap_status_e asynchronous_init_remove_eapol_key_state(

		const eap_am_network_id_c * const send_netword_id) = 0;

	//--------------------------------------------------

}; // class abs_eapol_key_state_c

#endif //#if !defined(_ABS_EAPOL_KEY_STATE_H_)

//--------------------------------------------------

// End.