/**

* Copyright (c) 2003-2009 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "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:

* Change Cipher Spec protocol events class header file.

* Describes a concrete class for SSL3.0/TLS1.0 Change Cipher spec messages (events),

* sent and received.

* 

*

*/

/**

 @file ChangeCipherEvents.h

*/

#ifndef _CHANGECIPHEREVENTS_H_

#define _CHANGECIPHEREVENTS_H_

#include "tlsevent.h"

const TUint8 KChangeCipherSpecMsgLength = 1;	// Length of ChangeCipherSpec message.

const TUint8 KChangeCipherSpecMsg = 1;			// Content of ChangeCipherSpec message.

class CHandshake;

class CRecordComposer;

class CStateMachine;

class CTLSProvider;

class CSendChangeCipherSpec : public CTlsEvent

/**

 * @class This class describes a Change Cipher Spec message sent by the protocol.

 * @brief This message consists of a single byte of value one, which is compressed

 * and encrypted under the current connection state.

 *

 * Note that Cipher spec messages (sent or received) are not part of the Handshake protocol 

 * and as such do not derive from the CHandshakeTransmit or CHandshakeReceive classes.

 */

{

public:

   CSendChangeCipherSpec( CTLSProvider& aTlsProvider, CStateMachine& aStateMachine, CRecordComposer& aRecordComposer );

   virtual CAsynchEvent* ProcessL( TRequestStatus& aStatus );

   CHandshake& Handshake();		// Used to access the iTransmitList (list of events to transmit).

private:

   CRecordComposer& iRecordComposer;	// Used to compose the transmitted message.

   TBuf8<KChangeCipherSpecMsgLength> iCipherSpecMsg;

   const TUint8* iMsgPtr;

};

inline CSendChangeCipherSpec::CSendChangeCipherSpec( CTLSProvider& aTlsProvider, CStateMachine& aStateMachine, CRecordComposer& aRecordComposer ) :

	CTlsEvent( &aTlsProvider, &aStateMachine ),

	iRecordComposer( aRecordComposer )

{

	iMsgPtr = &KChangeCipherSpecMsg;

}

inline CHandshake& CSendChangeCipherSpec::Handshake()

/**

 * This method returns a reference to a Handshake negotiation state machine.

 */

{

	return (CHandshake&) *iStateMachine;

}

class CRecordParser;

class CRecvChangeCipherSpec : public CTlsEvent

/**

 * @class This class describes a Change Cipher Spec message received by the protocol

 * (i.e., sent by the server). 

 * @brief This message consists of a single byte of value one, which is compressed

 * and encrypted under the current connection state.

 *

 */

{

public:

   CRecvChangeCipherSpec( CStateMachine& aStateMachine, CRecordParser& aRecordParser );

   virtual TBool AcceptRecord( TInt aRecordType ) const;

   virtual CAsynchEvent* ProcessL( TRequestStatus& aStatus );

private:

   CRecordParser& iRecordParser;	// Used to parse the received message.

};

inline CRecvChangeCipherSpec::CRecvChangeCipherSpec( CStateMachine& aStateMachine, CRecordParser& aRecordParser ) :

   CTlsEvent( NULL, &aStateMachine ),

   iRecordParser( aRecordParser )

{

}

#endif