crypto/weakcrypto/source/symmetric/mstreamcipher.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Tue, 31 Aug 2010 17:00:08 +0300 (2010-08-31)
branchRCL_3
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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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* streamcipher.cpp
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*
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*/
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#include "streamcipher.h"
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#include <cryptopanic.h>
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EXPORT_C void CStreamCipher::ProcessFinalL(const TDesC8& aInput, TDes8& aOutput)
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	{
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	Process(aInput, aOutput);
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	}
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EXPORT_C void CStreamCipher::Process(const TDesC8& aInput, TDes8& aOutput)
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	{
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	TInt outputIndex = aOutput.Size();
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	// aOutput may already have outputIndex bytes of data in it
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	// check there will still be enough space to process the result
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	__ASSERT_DEBUG(aOutput.MaxLength() - outputIndex >= MaxOutputLength(aInput.Length()), User::Panic(KCryptoPanic, ECryptoPanicOutputDescriptorOverflow));
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	aOutput.Append(aInput);
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	TPtr8 transformBuf((TUint8*)(aOutput.Ptr()) + outputIndex, aInput.Size(),
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		aInput.Size());
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	DoProcess(transformBuf);
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	}
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EXPORT_C TInt CStreamCipher::BlockSize() const
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	{
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	return (1);
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	}
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EXPORT_C TInt CStreamCipher::MaxOutputLength(TInt aInputLength) const
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	{
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	return aInputLength;
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	}
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EXPORT_C TInt CStreamCipher::MaxFinalOutputLength(TInt aInputLength) const
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	{
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	return aInputLength;
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	}
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