/*

* Copyright (c) 2007-2009 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: 

*

*/

/**

 @file

 @internalComponent

 @released

*/

#ifndef	__RIJNDAELIMPL_H__

#define	__RIJNDAELIMPL_H__

#include <e32base.h>

#include <e32cmn.h>

#include "keys.h"

#include "h4cipherimpl.h"

/**

Plug-in class for AES (Rijndael) block cipher

*/

namespace HwCrypto

	{

	class __NOTSHARED CH4RijndaelImpl : public CH4CipherImpl

		{

	public:

		/**

		Creates an instance of an AES (Rijndael) symmetric cipher plug-in.

		@param aKey The key

		@param aCryptoMode Whether to encrypt or decrypt

		@param aOperationMode The block cipher mode ECB, CBC, CTR etc

		@param aPadding The padding scheme to use None, SSLv3, PKCS#7

		@return A pointer to a CH4RijndaelImpl instance

		*/

		static CH4RijndaelImpl* NewL(const CryptoSpi::CKey& aKey, 

			TUid aCryptoMode, TUid aOperationMode, TUid aPadding);

		/**

		Creates an instance of an AES (Rijndael) symmetric cipher plug-in.

		A pointer to the plug-in instance is placed on the cleanup stack.

		@param aKey The key

		@param aCryptoMode Whether to encrypt or decrypt

		@param aOperationMode The block cipher mode ECB, CBC, CTR etc

		@param aPadding The padding scheme to use None, SSLv3, PKCS#7

		@return A pointer to a CH4RijndaelImpl instance

		*/

		static CH4RijndaelImpl* NewLC(const CryptoSpi::CKey& aKey, 

			TUid aCryptoMode,	TUid aOperationMode, TUid aPadding);

		// From CSymmetricCipherImpl

		TBool IsValidKeyLength(TInt aKeyBytes) const;

		TUid ImplementationUid() const;

		const CExtendedCharacteristics* GetExtendedCharacteristicsL();

		static CExtendedCharacteristics* StaticGetExtendedCharacteristicsL();

		/// Destructor

		~CH4RijndaelImpl();

	private:

		/**

		Constructor

		@param aOperationMode The mode of operation e.g. CBC

		@param aCryptoMode Whether to encrypt or decrypt

		@param aPaddingMode The padding mode to use. None, SSL, PKCS#7

		*/

		CH4RijndaelImpl(TUid aOperationMode, TUid aCryptoMode, TUid aPaddingMode);

		///	second phase of construction	

		void ConstructL(const CryptoSpi::CKey& aKey);

		// From CH4CipherImpl

		virtual void DoSetupL();

		virtual void DoWriteL(const TUint8* aBuffer, TUint aNumBytes);

		virtual void DoReadL(TDes8 &aBuffer, TUint32 aLength);

	private:

		RCryptoDriver iDriver;

		TBool iDriverOpen;

		};

	}

#endif //__RIJNDAELIMPL_H__