/*

* Copyright (c) 2008-2009 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: 

* mac plugin implementation

*

*/

/**

 @file

 @internalComponent

 @released

*/

#ifndef __CRYPTOAPI_SOFTWAREMACIMPL_H__

#define __CRYPTOAPI_SOFTWAREMACIMPL_H__

#include <cryptospi/macplugin.h>

#include "cryptosymmetriccipherapi.h"

#include "softwarehashbase.h"

#include "keys.h"

#include "cmacimpl.h"

#include "hmacimpl.h"

namespace SoftwareCrypto

	{

	using namespace CryptoSpi;

	NONSHARABLE_CLASS(CMacImpl) : public CBase, public MMac  

		{		

	public:

		/**

		 * MAC implementation instance creation methods

		 */

		static CMacImpl* NewL(const CKey& aKey,

				              const TUid aImplementationId,

				              const CCryptoParams* aAlgorithmParams);

		/**

		 * Methods from MPlugin: Base class for all the plugins

		 */

		void GetCharacteristicsL(const TCharacteristics*& aPluginCharacteristics);	

		const CExtendedCharacteristics* GetExtendedCharacteristicsL();

		TAny* GetExtension(TUid aExtensionId);

		void Reset();

		// this deletes the instance of this class. The method is called at the user side

		// indirectly through the MPlugin pointer instance.

		void Close();		

		/**

		 *  From MMac: MAC interface (Software based)

		 */

	    TPtrC8 MacL(const TDesC8& aMessage);

        void UpdateL(const TDesC8& aMessage);

        TPtrC8 FinalL(const TDesC8& aMessage);

		void ReInitialiseAndSetKeyL(const CKey& aKey);    

		MMac* ReplicateL();

		MMac* CopyL();

	private:

		/**

		 *  Enumerators to recognize the type of algorithm used for MAC

		 */

		enum TMacBase {EHashBased, ECipherBased};

		/**

		 * Constructors and Destructors

		 */

		~CMacImpl();

    	CMacImpl();

		CMacImpl(const CMacImpl& aMacImpl);

		/**

		 * Initialize the 'iHmacImpl' and 'iCipherImpl' instances.

		 */

		void ConstructL(const CKey& aKey, const TUid aImplementationId,const CCryptoParams* aAlgorithmParams);

		/**

		 * This will return the Uid of the specific implementation

		 * used for the algorithm.

		 */

		TUid ImplementationUid() const;

	private:			

		TUid iImplementationUid;

		TMacBase iBase;

		CKey* iKey;

		/**

		 * The hash based MAC implementation. This is software based implementation.

		 */

		CHMacImpl* iHmacImpl;

		/**

		 * The symmetric cipher based MAC implementation.

		 */

		CCMacImpl* iCmacImpl;

		};

	}

#endif // __CRYPTOAPI_SOFTWAREMACIMPL_H__