/*

* 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: 

*

*/

#include "arc4shim.h"

#include "cryptosymmetriccipherapi.h"

#include <cryptospi/cryptospidef.h>

#include <cryptospi/plugincharacteristics.h>

#include <cryptostrength.h>

#include "../common/inlines.h"

#include "keys.h"

using namespace CryptoSpi;

CArc4Shim* CArc4Shim::NewL(const TDesC8& aKey, TUint aDiscardBytes)

	{

	CArc4Shim* self = NewLC(aKey, aDiscardBytes);

	CleanupStack::Pop(self);

	return self;

	}

CArc4Shim* CArc4Shim::NewLC(const TDesC8& aKey, TUint aDiscardBytes)

	{

	CArc4Shim* self = new (ELeave) CArc4Shim();

	CleanupStack::PushL(self);

	self->ConstructL(aKey, aDiscardBytes);

	TCrypto::IsSymmetricWeakEnoughL(BytesToBits(aKey.Size()));

	return self;

	}

void CArc4Shim::ConstructL(const TDesC8& aKey, TUint aDiscardBytes)

	{

	TKeyProperty keyProperty = {KArc4Uid, KNullUid, KSymmetricKey, KNonEmbeddedKeyUid};

	CCryptoParams* keyParam =CCryptoParams::NewLC();

	keyParam->AddL(aKey, KSymmetricKeyParameterUid);

	iKey=CKey::NewL(keyProperty, *keyParam);

	CleanupStack::PopAndDestroy(keyParam);

	iAlgorithmParams = CCryptoParams::NewL();

	iAlgorithmParams->AddL(aDiscardBytes, KARC4DiscardBytes);

	CSymmetricCipherFactory::CreateSymmetricCipherL(

												iSymmetricCipherImpl,

												KArc4Uid,

												*iKey,

												KCryptoModeNoneUid,

												KOperationModeNoneUid,

												KPaddingModeNoneUid,

												iAlgorithmParams);

	}

CArc4Shim::~CArc4Shim()

	{

	delete iSymmetricCipherImpl;

	delete iKey;	

	delete iAlgorithmParams;

	}

void CArc4Shim::Reset()

	{

	iSymmetricCipherImpl->Reset();

	}

TInt CArc4Shim::BlockSize() const

	{

	return iSymmetricCipherImpl->BlockSize() >> 3; // Convert to bits

	}

TInt CArc4Shim::KeySize() const

	{

	return iSymmetricCipherImpl->KeySize();

	}

void CArc4Shim::Process(const TDesC8& aInput, TDes8& aOutput)

	{

	TRAP_IGNORE(iSymmetricCipherImpl->ProcessL(aInput, aOutput);)

	}

void CArc4Shim::ProcessFinalL(const TDesC8& aInput, TDes8& aOutput)

	{

	iSymmetricCipherImpl->ProcessFinalL(aInput, aOutput);

	}

TInt CArc4Shim::MaxOutputLength(TInt aInputLength) const

	{

	return iSymmetricCipherImpl->MaxOutputLength(aInputLength);

	}

TInt CArc4Shim::MaxFinalOutputLength(TInt aInputLength) const

	{

	return iSymmetricCipherImpl->MaxFinalOutputLength(aInputLength);

	}

CArc4Shim::CArc4Shim()

	{		

	}