/*

 * 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__