sl@0: /*
sl@0: * Copyright (c) 2006-2010 Nokia Corporation and/or its subsidiary(-ies).
sl@0: * All rights reserved.
sl@0: * This component and the accompanying materials are made available
sl@0: * under the terms of the License "Eclipse Public License v1.0"
sl@0: * which accompanies this distribution, and is available
sl@0: * at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: *
sl@0: * Initial Contributors:
sl@0: * Nokia Corporation - initial contribution.
sl@0: *
sl@0: * Contributors:
sl@0: *
sl@0: * Description: 
sl@0: *
sl@0: */
sl@0: 
sl@0: 
sl@0: 
sl@0: #include "arc4shim.h"
sl@0: 
sl@0: #include <cryptospi/cryptosymmetriccipherapi.h>
sl@0: #include <cryptospi/cryptospidef.h>
sl@0: #include <cryptospi/plugincharacteristics.h>
sl@0: #include <cryptostrength.h>
sl@0: #include "../common/inlines.h"
sl@0: #include <cryptospi/keys.h>
sl@0: 
sl@0: using namespace CryptoSpi;
sl@0: 
sl@0: CArc4Shim* CArc4Shim::NewL(const TDesC8& aKey, TUint aDiscardBytes)
sl@0: 	{
sl@0: 	CArc4Shim* self = NewLC(aKey, aDiscardBytes);
sl@0: 	CleanupStack::Pop(self);
sl@0: 	return self;
sl@0: 	}
sl@0: 
sl@0: CArc4Shim* CArc4Shim::NewLC(const TDesC8& aKey, TUint aDiscardBytes)
sl@0: 	{
sl@0: 	CArc4Shim* self = new (ELeave) CArc4Shim();
sl@0: 	CleanupStack::PushL(self);
sl@0: 	self->ConstructL(aKey, aDiscardBytes);
sl@0: 	TCrypto::IsSymmetricWeakEnoughL(BytesToBits(aKey.Size()));
sl@0: 	return self;
sl@0: 	}
sl@0: 
sl@0: void CArc4Shim::ConstructL(const TDesC8& aKey, TUint aDiscardBytes)
sl@0: 	{
sl@0: 	TKeyProperty keyProperty = {KArc4Uid, KNullUid, KSymmetricKey, KNonEmbeddedKeyUid};
sl@0: 	CCryptoParams* keyParam =CCryptoParams::NewLC();
sl@0: 	keyParam->AddL(aKey, KSymmetricKeyParameterUid);
sl@0: 	iKey=CKey::NewL(keyProperty, *keyParam);
sl@0: 	CleanupStack::PopAndDestroy(keyParam);
sl@0: 	
sl@0: 	iAlgorithmParams = CCryptoParams::NewL();
sl@0: 	iAlgorithmParams->AddL(aDiscardBytes, KARC4DiscardBytes);
sl@0: 
sl@0: 	CSymmetricCipherFactory::CreateSymmetricCipherL(
sl@0: 												iSymmetricCipherImpl,
sl@0: 												KArc4Uid,
sl@0: 												*iKey,
sl@0: 												KCryptoModeNoneUid,
sl@0: 												KOperationModeNoneUid,
sl@0: 												KPaddingModeNoneUid,
sl@0: 												iAlgorithmParams);
sl@0: 	}
sl@0: 
sl@0: CArc4Shim::~CArc4Shim()
sl@0: 	{
sl@0: 	delete iSymmetricCipherImpl;
sl@0: 	delete iKey;	
sl@0: 	delete iAlgorithmParams;
sl@0: 	}
sl@0: 
sl@0: void CArc4Shim::Reset()
sl@0: 	{
sl@0: 	iSymmetricCipherImpl->Reset();
sl@0: 	}
sl@0: 
sl@0: TInt CArc4Shim::BlockSize() const
sl@0: 	{
sl@0: 	return iSymmetricCipherImpl->BlockSize() >> 3; // Convert to bits
sl@0: 	}
sl@0: 
sl@0: TInt CArc4Shim::KeySize() const
sl@0: 	{
sl@0: 	return iSymmetricCipherImpl->KeySize();
sl@0: 	}
sl@0: 
sl@0: void CArc4Shim::Process(const TDesC8& aInput, TDes8& aOutput)
sl@0: 	{
sl@0: 	TRAP_IGNORE(iSymmetricCipherImpl->ProcessL(aInput, aOutput);)
sl@0: 	}
sl@0: 
sl@0: void CArc4Shim::ProcessFinalL(const TDesC8& aInput, TDes8& aOutput)
sl@0: 	{
sl@0: 	iSymmetricCipherImpl->ProcessFinalL(aInput, aOutput);
sl@0: 	}
sl@0: 
sl@0: TInt CArc4Shim::MaxOutputLength(TInt aInputLength) const
sl@0: 	{
sl@0: 	return iSymmetricCipherImpl->MaxOutputLength(aInputLength);
sl@0: 	}
sl@0: 
sl@0: TInt CArc4Shim::MaxFinalOutputLength(TInt aInputLength) const
sl@0: 	{
sl@0: 	return iSymmetricCipherImpl->MaxFinalOutputLength(aInputLength);
sl@0: 	}
sl@0: 
sl@0: CArc4Shim::CArc4Shim()
sl@0: 	{		
sl@0: 	}
sl@0: