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: * blocktransformationshim.cpp
sl@0: *
sl@0: */
sl@0: 
sl@0: 
sl@0: #include "bufferedtransformationshim.h"
sl@0: 
sl@0: #include <cryptospi/cryptospidef.h>
sl@0: #include <padding.h>
sl@0: #include <cryptospi/cryptosymmetriccipherapi.h>
sl@0: #include <cryptospi/plugincharacteristics.h>
sl@0: #include "../common/inlines.h"
sl@0: 
sl@0: // CBufferedEncryptorShim
sl@0: CBufferedEncryptorShim::CBufferedEncryptorShim(CryptoSpi::CSymmetricCipher* aSymmetricCipherImpl) :
sl@0: 	iSymmetricCipherImpl(aSymmetricCipherImpl)
sl@0: 	{
sl@0: 	}
sl@0: 
sl@0: CBufferedEncryptorShim* CBufferedEncryptorShim::NewL(CBlockTransformation* aBT, CPadding* aPadding)
sl@0: 	{
sl@0: 	CBufferedEncryptorShim* self(0);
sl@0: 	
sl@0: 	// Check whether the block transform contains an SPI plug-in
sl@0: 	TAny* implPtr(0);
sl@0: 	TInt err = aBT->GetExtension(CryptoSpi::KSymmetricCipherInterface, implPtr, NULL);	
sl@0: 	if (err == KErrNone && implPtr)
sl@0: 		{
sl@0: 		CryptoSpi::CSymmetricCipher* impl(static_cast<CryptoSpi::CSymmetricCipher*>(implPtr));
sl@0: 		
sl@0: 		const CryptoSpi::TCharacteristics* c(0);
sl@0: 		impl->GetCharacteristicsL(c);
sl@0: 	
sl@0: 		const CryptoSpi::TSymmetricCipherCharacteristics* cipherCharacteristics(
sl@0: 			static_cast<const CryptoSpi::TSymmetricCipherCharacteristics*>(c));
sl@0: 			
sl@0: 		// See if the padding mode is recognised by CryptoSpi and if so, check
sl@0: 		// whether the plug-in supports that padding mode.
sl@0: 		TUid paddingMode;
sl@0: 		TAny* paddingPtr = &paddingMode;		
sl@0: 		err = aPadding->GetExtension(CryptoSpi::KPaddingInterface, paddingPtr, 0);		
sl@0: 		if (err == KErrNone && cipherCharacteristics->IsPaddingModeSupported(paddingMode))
sl@0: 			{
sl@0: 			impl->SetCryptoModeL(CryptoSpi::KCryptoModeEncryptUid);
sl@0: 			impl->SetPaddingModeL(paddingMode);		
sl@0: 			self = new(ELeave) CBufferedEncryptorShim(impl);
sl@0: 			CleanupStack::PushL(self);
sl@0: 			self->ConstructL(aBT, aPadding);
sl@0: 			CleanupStack::Pop(self);
sl@0: 			}
sl@0: 		}				
sl@0: 	return self;
sl@0: 	}
sl@0: 
sl@0: void CBufferedEncryptorShim::ConstructL(CBlockTransformation* aBT, CPadding* aPadding)
sl@0: 	{
sl@0: 	CBufferedEncryptor::ConstructL(aBT, aPadding);
sl@0: 	}
sl@0: 
sl@0: void CBufferedEncryptorShim::Process(const TDesC8& aInput, TDes8& aOutput)
sl@0: 	{
sl@0: 	TRAP_IGNORE(iSymmetricCipherImpl->ProcessL(aInput, aOutput);)
sl@0: 	}
sl@0: 	
sl@0: TInt CBufferedEncryptorShim::MaxOutputLength(TInt aInputLength) const
sl@0: 	{
sl@0: 	return iSymmetricCipherImpl->MaxOutputLength(aInputLength);
sl@0: 	}
sl@0: 	
sl@0: void CBufferedEncryptorShim::Reset()
sl@0: 	{
sl@0: 	iSymmetricCipherImpl->Reset();
sl@0: 	}
sl@0: 	
sl@0: TInt CBufferedEncryptorShim::BlockSize() const
sl@0: 	{
sl@0: 	return BitsToBytes(iSymmetricCipherImpl->BlockSize());
sl@0: 	}
sl@0: 	
sl@0: TInt CBufferedEncryptorShim::KeySize() const
sl@0: 	{
sl@0: 	return iSymmetricCipherImpl->KeySize();
sl@0: 	}
sl@0: 	
sl@0: void CBufferedEncryptorShim::ProcessFinalL(const TDesC8& aInput, TDes8& aOutput)
sl@0: 	{
sl@0: 	iSymmetricCipherImpl->ProcessFinalL(aInput, aOutput);
sl@0: 	}
sl@0: 	
sl@0: TInt CBufferedEncryptorShim::MaxFinalOutputLength(TInt aInputLength) const
sl@0: 	{
sl@0: 	return iSymmetricCipherImpl->MaxFinalOutputLength(aInputLength);
sl@0: 	}
sl@0: 
sl@0: // CBufferedDecryptorShim
sl@0: CBufferedDecryptorShim::CBufferedDecryptorShim(CryptoSpi::CSymmetricCipher* aSymmetricCipherImpl) :
sl@0: 	iSymmetricCipherImpl(aSymmetricCipherImpl)
sl@0: 	{
sl@0: 	}
sl@0: 
sl@0: CBufferedDecryptorShim* CBufferedDecryptorShim::NewL(CBlockTransformation* aBT, CPadding* aPadding)
sl@0: 	{
sl@0: 	CBufferedDecryptorShim* self(0);
sl@0: 	
sl@0: 	// Check whether the block transform contains an SPI plug-in
sl@0: 	TAny* implPtr(0);
sl@0: 	TInt err = aBT->GetExtension(CryptoSpi::KSymmetricCipherInterface, implPtr, NULL);	
sl@0: 	if (err == KErrNone && implPtr)
sl@0: 		{
sl@0: 		CryptoSpi::CSymmetricCipher* impl(static_cast<CryptoSpi::CSymmetricCipher*>(implPtr));
sl@0: 		
sl@0: 		const CryptoSpi::TCharacteristics* c(0);
sl@0: 		impl->GetCharacteristicsL(c);
sl@0: 	
sl@0: 		const CryptoSpi::TSymmetricCipherCharacteristics* cipherCharacteristics(
sl@0: 			static_cast<const CryptoSpi::TSymmetricCipherCharacteristics*>(c));
sl@0: 			
sl@0: 		// See if the padding mode is recognised by CryptoSpi and if so, check
sl@0: 		// whether the plug-in supports that padding mode.
sl@0: 		TUid paddingMode;
sl@0: 		TAny* paddingPtr = &paddingMode;		
sl@0: 		err = aPadding->GetExtension(CryptoSpi::KPaddingInterface, paddingPtr, 0);		
sl@0: 		if (err == KErrNone && cipherCharacteristics->IsPaddingModeSupported(paddingMode))
sl@0: 			{
sl@0: 			impl->SetCryptoModeL(CryptoSpi::KCryptoModeDecryptUid);			
sl@0: 			impl->SetPaddingModeL(paddingMode);
sl@0: 			
sl@0: 			self = new(ELeave) CBufferedDecryptorShim(impl);
sl@0: 			CleanupStack::PushL(self);
sl@0: 			self->ConstructL(aBT, aPadding);
sl@0: 			CleanupStack::Pop(self);
sl@0: 			}
sl@0: 		}				
sl@0: 	return self;
sl@0: 	}
sl@0: 
sl@0: void CBufferedDecryptorShim::ConstructL(CBlockTransformation* aBT, CPadding* aPadding)
sl@0: 	{
sl@0: 	CBufferedDecryptor::ConstructL(aBT, aPadding);
sl@0: 	}
sl@0: 
sl@0: void CBufferedDecryptorShim::Process(const TDesC8& aInput, TDes8& aOutput)
sl@0: 	{
sl@0: 	TRAP_IGNORE(iSymmetricCipherImpl->ProcessL(aInput, aOutput);)
sl@0: 	}
sl@0: 	
sl@0: TInt CBufferedDecryptorShim::MaxOutputLength(TInt aInputLength) const
sl@0: 	{
sl@0: 	return iSymmetricCipherImpl->MaxOutputLength(aInputLength);
sl@0: 	}
sl@0: 	
sl@0: void CBufferedDecryptorShim::Reset()
sl@0: 	{
sl@0: 	iSymmetricCipherImpl->Reset();
sl@0: 	}
sl@0: 	
sl@0: TInt CBufferedDecryptorShim::BlockSize() const
sl@0: 	{
sl@0: 	return BitsToBytes(iSymmetricCipherImpl->BlockSize());
sl@0: 	}
sl@0: 	
sl@0: TInt CBufferedDecryptorShim::KeySize() const
sl@0: 	{
sl@0: 	return iSymmetricCipherImpl->KeySize();
sl@0: 	}
sl@0: 	
sl@0: void CBufferedDecryptorShim::ProcessFinalL(const TDesC8& aInput, TDes8& aOutput)
sl@0: 	{
sl@0: 	iSymmetricCipherImpl->ProcessFinalL(aInput, aOutput);
sl@0: 	}
sl@0: 	
sl@0: TInt CBufferedDecryptorShim::MaxFinalOutputLength(TInt aInputLength) const
sl@0: 	{
sl@0: 	return iSymmetricCipherImpl->MaxFinalOutputLength(aInputLength);
sl@0: 	}