sl@0: /*
sl@0: * Copyright (c) 2006-2009 Nokia Corporation and/or its subsidiary(-ies).
sl@0: * All rights reserved.
sl@0: * This component and the accompanying materials are made available
sl@0: * under the terms of the License "Eclipse Public License v1.0"
sl@0: * which accompanies this distribution, and is available
sl@0: * at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: *
sl@0: * Initial Contributors:
sl@0: * Nokia Corporation - initial contribution.
sl@0: *
sl@0: * Contributors:
sl@0: *
sl@0: * Description: 
sl@0: * hmac implementation
sl@0: *
sl@0: */
sl@0: 
sl@0: 
sl@0: /**
sl@0:  @file
sl@0:  @internalComponent
sl@0:  @released
sl@0: */
sl@0: 
sl@0: #ifndef __CRYPTOAPI_SOFTWAREHMACIMPL_H__
sl@0: #define __CRYPTOAPI_SOFTWAREHMACIMPL_H__
sl@0: 
sl@0: #include "softwarehashbase.h"
sl@0: #include "keys.h"
sl@0: 
sl@0: namespace SoftwareCrypto
sl@0: 	{
sl@0: 	using namespace CryptoSpi;
sl@0: 	
sl@0: 	/**
sl@0: 	 * This is the maximum block size currently supported by HMAC implementation.
sl@0: 	 */  
sl@0: 	const TInt KMaxBlockSize = 128;		
sl@0: 	
sl@0: 	NONSHARABLE_CLASS(CHMacImpl) : public CBase, public MSoftwareHash
sl@0: 		{		
sl@0: 	public:
sl@0: 		//NewL & NewLC
sl@0: 		static CHMacImpl* NewL(MSoftwareHash* aHash);
sl@0: 		static CHMacImpl* NewLC(MSoftwareHash* aHash);
sl@0: 		static CHMacImpl* NewL(const CKey& aKey, MSoftwareHash* aHash);
sl@0: 		static CHMacImpl* NewLC(const CKey& aKey, MSoftwareHash* aHash);
sl@0: 
sl@0: 		//From MPlugin
sl@0: 		void Reset();
sl@0: 		void Close();		
sl@0: 		void GetCharacteristicsL(const TCharacteristics*& aPluginCharacteristics);		
sl@0: 		const CExtendedCharacteristics* GetExtendedCharacteristicsL();
sl@0: 		TAny* GetExtension(TUid aExtensionId);
sl@0: 		
sl@0: 		//From MHmac
sl@0: 	    TPtrC8 Hash(const TDesC8& aMessage);
sl@0: 	    void Update(const TDesC8& aMessage);
sl@0: 		TPtrC8 Final(const TDesC8& aMessage);
sl@0: 		void SetKeyL(const CKey& aKey);
sl@0: 		void SetOperationModeL(TUid aOperationMode);
sl@0: 		MHash* ReplicateL();		
sl@0: 		MHash* CopyL();
sl@0: 				
sl@0: 	private:
sl@0: 		//Constructors
sl@0: 		CHMacImpl();
sl@0: 		CHMacImpl(const CHMacImpl& aHMacImpl);
sl@0: 		
sl@0: 		//Destructor
sl@0: 		~CHMacImpl();
sl@0: 		void RestoreState();
sl@0: 		void StoreState();
sl@0: 		void ConstructL(const CKey& aKey, MSoftwareHash* aHash);
sl@0: 		void ConstructL(MSoftwareHash* aHash);
sl@0: 		void Initialise(const TDesC8& aKey);
sl@0: 		void InitBlockSizeL();
sl@0: 		
sl@0: 	private:
sl@0: 		TUid iImplementationUid;
sl@0: 		MSoftwareHash* iDigest;
sl@0: 		
sl@0: 		TBuf8<KMaxBlockSize> iInnerPad;
sl@0: 		TBuf8<KMaxBlockSize> iOuterPad;
sl@0: 		TBuf8<KMaxBlockSize> iInnerPadCopy;
sl@0: 		TBuf8<KMaxBlockSize> iOuterPadCopy;
sl@0: 		
sl@0: 		TInt iBlockSize;
sl@0: 		};
sl@0: 	}
sl@0: 
sl@0: #endif // __CRYPTOAPI_SOFTWAREHMACIMPL_H__