/*+
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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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*+
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*/+
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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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+
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#ifndef __STREAMCIPHER_H__+
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#define __STREAMCIPHER_H__+
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+
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#include <msymmetriccipher.h>+
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+
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/**+
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*	Abstract interface class to be implemented by Stream Ciphers.+
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*/+
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class CStreamCipher : public CSymmetricCipher+
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{+
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public:	//	From CSymmetricCipher+
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	/**	+
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	*	Implemented by calling the DoProcess() pure virtual function, +
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	*	to be implemented by subclasses.+
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	*+
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	*	@param aInput	Input text.+
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	*	@param aOutput	Text after processing.+
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	*/+
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	IMPORT_C virtual void ProcessFinalL(const TDesC8& aInput, TDes8& aOutput);+
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+
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	/**	+
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	*	Implemented by calling the DoProcess() pure virtual function, +
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	*	to be implemented by subclasses.+
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	*+
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	*	@param aInput	Input text.+
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	*	@param aOutput	Text after processing.+
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	*/+
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	IMPORT_C virtual void Process(const TDesC8& aInput, TDes8& aOutput);	+
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+
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	/**+
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	*	Gets the block size in bytes (always = 1 for stream ciphers).+
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	*+
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	*	@return	Cipher block size (in bytes).+
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	*/+
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	IMPORT_C virtual TInt BlockSize(void) const;+
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	IMPORT_C virtual TInt MaxOutputLength(TInt aInputLength) const;+
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	IMPORT_C virtual TInt MaxFinalOutputLength(TInt aInputLength) const;+
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protected:+
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	/**	+
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	*	DoProcess() pure virtual function, +
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	*	to be implemented by subclasses.+
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	*+
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	*	@param aData	On input, text to be processed; on return, processed text.+
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	*/+
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	IMPORT_C virtual void DoProcess(TDes8& aData) = 0;+
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};+
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+
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#endif	//	__STREAMCIPHER_H__+
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