/*

* 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: 

* streamcipher.cpp

*

*/

#include "streamcipher.h"

#include <cryptopanic.h>

EXPORT_C void CStreamCipher::ProcessFinalL(const TDesC8& aInput, TDes8& aOutput)

	{

	Process(aInput, aOutput);

	}

EXPORT_C void CStreamCipher::Process(const TDesC8& aInput, TDes8& aOutput)

	{

	TInt outputIndex = aOutput.Size();

	// aOutput may already have outputIndex bytes of data in it

	// check there will still be enough space to process the result

	__ASSERT_DEBUG(aOutput.MaxLength() - outputIndex >= MaxOutputLength(aInput.Length()), User::Panic(KCryptoPanic, ECryptoPanicOutputDescriptorOverflow));

	aOutput.Append(aInput);

	TPtr8 transformBuf((TUint8*)(aOutput.Ptr()) + outputIndex, aInput.Size(),

		aInput.Size());

	DoProcess(transformBuf);

	}

EXPORT_C TInt CStreamCipher::BlockSize() const

	{

	return (1);

	}

EXPORT_C TInt CStreamCipher::MaxOutputLength(TInt aInputLength) const

	{

	return aInputLength;

	}

EXPORT_C TInt CStreamCipher::MaxFinalOutputLength(TInt aInputLength) const

	{

	return aInputLength;

	}