/*

* 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.

* CNullCipher class implementation

*

*/

/**

 @file 

 @publishedPartner

 @released 

*/

#ifndef __NULLCIPHER_H__

#define __NULLCIPHER_H__

#include <streamcipher.h>

/**

* Stream cipher that does no encryption or decryption, but simply returns the

* data given to it.

* From CBlockTransformation

*

*/

class CNullCipher : public CStreamCipher

{

public:	

	/**

	 * Creates a new CNullCipher object.

	 * 

	 * @return	A pointer to a new CNullCipher object

	 */

	IMPORT_C static CNullCipher* NewL(void);

	/**

	 * Creates a new CNullCipher object.

	 * 

	 * The returned pointer is put onto the cleanup stack.

	 * 

	 * @return	A pointer to a new CNullCipher object

	 */

	IMPORT_C static CNullCipher* NewLC(void);

	virtual void Reset(void);

	virtual TInt KeySize(void) const;

protected:

	virtual void DoProcess(TDes8& aData);

	/**

	 * @internalAll

	 */

	CNullCipher();

};

#endif	//	__NULLCIPHER_H__