/*

* Copyright (c) 2006-2009 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: 

*

*/

#ifndef __BUFFEREDTRANSFORMATIONSHIM_H__

#define __BUFFEREDTRANSFORMATIONSHIM_H__

#include <bufferedtransformation.h>

/**

@file

@internalComponent

@released

*/

namespace CryptoSpi 

	{

	class CSymmetricCipher;

	}

/**

 Shim class that delegates all operations to an Crypto Spi object.

 This object is constructed automatically by CBufferedEncryptorShim and should

 not be used directly.

 */

NONSHARABLE_CLASS(CBufferedEncryptorShim) : public CBufferedEncryptor

{

public:

	/**

	Creates a new CBufferedEncryptorShim.

	N.B. It is the reponsiblity of the CALLER to check that block transform

	object contains an SPI delegate and that the delegate supports the specified

	padding mode.

	*/

	static CBufferedEncryptorShim* NewL(CBlockTransformation* aBT, CPadding* aPadding);

	// From CBufferedTransformation

	void Process(const TDesC8& aInput, TDes8& aOutput);

	TInt MaxOutputLength(TInt aInputLength) const;

	void Reset();

	TInt BlockSize() const;

	TInt KeySize() const;	

	void ProcessFinalL(const TDesC8& aInput, TDes8& aOutput);

	TInt MaxFinalOutputLength(TInt aInputLength) const;

private:	

	CBufferedEncryptorShim(CryptoSpi::CSymmetricCipher* aSymmetricCipherImpl);

	void ConstructL(CBlockTransformation* aBT, CPadding* aPadding);

	// owned by block transform - iBT

	CryptoSpi::CSymmetricCipher* iSymmetricCipherImpl;

};

/**

 Shim class that delegates all operations to an Crypto Spi object.

 This object is constructed automatically by CBufferedEncryptorShim and should

 not be used directly.

 */

NONSHARABLE_CLASS(CBufferedDecryptorShim) : public CBufferedDecryptor

{

public:

	/**

	Creates a new CBufferedDecryptorShim.

	N.B. It is the reponsiblity of the CALLER to check that block transform

	object contains an SPI delegate and that the delegate supports the specified

	padding mode.

	*/

	static CBufferedDecryptorShim* NewL(CBlockTransformation* aBT, CPadding* aPadding);

	// From CBufferedTransformation	

	void Process(const TDesC8& aInput, TDes8& aOutput);

	TInt MaxOutputLength(TInt aInputLength) const;

	void Reset();

	TInt BlockSize() const;

	TInt KeySize() const;	

	void ProcessFinalL(const TDesC8& aInput, TDes8& aOutput);

	TInt MaxFinalOutputLength(TInt aInputLength) const;

private:	

	CBufferedDecryptorShim(CryptoSpi::CSymmetricCipher* aSymmetricCipherImpl);

	void ConstructL(CBlockTransformation* aBT, CPadding* aPadding);

	// owned by block transform - iBT

	CryptoSpi::CSymmetricCipher* iSymmetricCipherImpl;

};

#endif	//	__BUFFEREDTRANSFORMATIONSHIM_H__