/** Copyright (c) 2002-2009 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: * ** IMPORTANT ** PublishedPartner API's in this file are published to 3rd party developers via the * Symbian website. Changes to these API's should be treated as PublishedAll API changes and the Security TA should be consulted.* CBlockTransformation class implementation**//** @file @publishedPartner @released */#ifndef BLOCKTRANSFORMATION_H__#define BLOCKTRANSFORMATION_H__#include <e32base.h>#ifndef SYMBIAN_ENABLE_SPLIT_HEADERS/** The maximum block size supported (in bytes) */const TUint KMaxBlockSizeSupported = 32;#endif/*** Abstract base class defining the interface to block transformation schemes.** Block transformation schemes process a fixed-size block of input to return a* block of output the same size. **/class CBlockTransformation : public CBase{public: /** * Transforms the supplied block, returning the new value using the same * parameter. aBlock.Size() must be the same length as BlockSize(). * * @param aBlock On input, the data to be transformed; * on return, the data after transformation. */ virtual void Transform(TDes8& aBlock) = 0; /** * Resets the transformation back to its original state. Clears all its buffers. */ virtual void Reset() = 0; /** * Gets the block size in bytes. * * @return Block size in bytes. */ virtual TInt BlockSize() const = 0; /** * Gets the key size in bits. * * @return Key size in bits. */ virtual TInt KeySize() const = 0;};#endif // BLOCKTRANSFORMATION_H__