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