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/*
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* Copyright (c) 2002-2009 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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* ** IMPORTANT ** PublishedPartner API's in this file are published to 3rd party developers via the
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* Symbian website. Changes to these API's should be treated as PublishedAll API changes and the Security TA should be consulted.
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* CBlockTransformation class implementation
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*
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*/
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/**
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@file
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@publishedPartner
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* @released
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*/
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#ifndef __BLOCKTRANSFORMATION_H__
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#define __BLOCKTRANSFORMATION_H__
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#include <e32base.h>
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#ifndef SYMBIAN_ENABLE_SPLIT_HEADERS
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/** The maximum block size supported (in bytes) */
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const TUint KMaxBlockSizeSupported = 32;
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#endif
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/**
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* Abstract base class defining the interface to block transformation schemes.
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*
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* Block transformation schemes process a fixed-size block of input to return a
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* block of output the same size.
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*
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*/
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class CBlockTransformation : public CBase
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{
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public:
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/**
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* Transforms the supplied block, returning the new value using the same
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* parameter. aBlock.Size() must be the same length as BlockSize().
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*
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* @param aBlock On input, the data to be transformed;
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* on return, the data after transformation.
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*/
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virtual void Transform(TDes8& aBlock) = 0;
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/**
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* Resets the transformation back to its original state. Clears all its buffers.
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*/
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virtual void Reset() = 0;
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/**
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* Gets the block size in bytes.
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*
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* @return Block size in bytes.
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*/
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virtual TInt BlockSize() const = 0;
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/**
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* Gets the key size in bits.
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*
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* @return Key size in bits.
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*/
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virtual TInt KeySize() const = 0;
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/**
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@internalComponent
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Used to retrieve the extended interfaces by id. For Crypto
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SPI internal use only.
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*/
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TInt GetExtension(TUint aExtensionId, TAny*& a0, TAny* a1);
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};
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#endif // __BLOCKTRANSFORMATION_H__
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