/*

 * Copyright (c) 2006-2009 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: 

 * Software hash base definition

 *

 */

 /**

  @file

  @internalComponent

  @released

 */

 #ifndef __CRYPTOAPI_SOFTWAREHASHBASE_H__

 #define __CRYPTOAPI_SOFTWAREHASHBASE_H__

 #include <cryptospi/hashplugin.h>

 #include "keys.h"

 namespace SoftwareCrypto

 	{

 	using namespace CryptoSpi;

 	/**

 	Interfaces for Software Hash

 	*/

 	class MSoftwareHash : public MHash

 		{

 	public:

 		/**

 		Restores the internal state of the message digest

 		to a previously stored state.

 		*/

 		virtual void RestoreState() = 0;

 		/**

 		Stores the internal state of the message digest.

 		*/

 		virtual void StoreState() = 0;

 		};

 	/**

 	Proxy class Software Hash and Hmac implementation

 	*/

 	NONSHARABLE_CLASS(CSoftwareHash) : public MHash, public CBase

 		{

 	public:

 		//

 		//NewL & NewLC

 		//

 		static CSoftwareHash* NewL(TUid aAlgorithm, TUid aOperationMode, const CKey* aKey);

 		static CSoftwareHash* NewLC(TUid aAlgorithm, TUid aOperationMode, const CKey* aKey);

 		static CSoftwareHash* NewL(TUid aAlgorithm);

 		//

 		// Destructor

 		//

 		~CSoftwareHash();

 		//

 		//From MPlugin

 		//

 		void Reset();

 		void Close();		

 		void GetCharacteristicsL(const TCharacteristics*& aPluginCharacteristics);		

 		const CExtendedCharacteristics* GetExtendedCharacteristicsL();

 		TAny* GetExtension(TUid aExtensionId);

 		//

 		//From MHash

 		//

 	    TPtrC8 Hash(const TDesC8& aMessage);

 	    void Update(const TDesC8& aMessage);

 		TPtrC8 Final(const TDesC8& aMessage);

 		MHash* ReplicateL();		

 		MHash* CopyL();

 		void SetKeyL(const CKey& aKey);			

 		void SetOperationModeL(TUid aOperationMode);

 	private:

 		//

 		//Constructor

 		// 

 		CSoftwareHash();

 		void ConstructL(TUid aAlgorithm, TUid aOperationMode, const CKey* aKey);

 		//

 		//get the active implementation

 		//

 		MSoftwareHash* Impl();

 	private:

 		/**

 		The Key for HMAC mode operation

 		*/

 		CKey* iKey;

 		/**

 		The Uid for the operation mode

 		*/

 		TUid iOperationMode;

 		/**

 		The hash implementation

 		*/

 		MSoftwareHash* iHashImpl;

 		/**

 		The Hmac implementation

 		*/

 		MSoftwareHash* iHmacImpl;

 		};

 	GLDEF_C inline TUint CMD_R(TUint a,TUint s)

 		{

 		return (a<<s) | (a>>(32-s));

 		}

 	}

 #endif // __CRYPTOAPI_SOFTWAREHASHBASE_H__