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: #include "desshim.h"
sl@0: 
sl@0: #include <cryptospi/cryptosymmetriccipherapi.h>
sl@0: #include <cryptospi/cryptospidef.h>
sl@0: #include <cryptospi/plugincharacteristics.h>
sl@0: #include <cryptospi/keys.h>
sl@0: #include <cryptostrength.h>
sl@0: 
sl@0: #include "../common/inlines.h"
sl@0: 
sl@0: using namespace CryptoSpi;
sl@0: 
sl@0: // CDESEncryptorShim ////////////////////////////////////////////////////////
sl@0: CDESEncryptorShim* CDESEncryptorShim::NewL(const TDesC8& aKey)
sl@0: 	{
sl@0: 	CDESEncryptorShim* self = CDESEncryptorShim::NewLC(aKey);
sl@0: 	CleanupStack::Pop(self);
sl@0: 	return self;
sl@0: 	}
sl@0: 
sl@0: CDESEncryptorShim* CDESEncryptorShim::NewLC(const TDesC8& aKey)
sl@0: 	{
sl@0: 	CDESEncryptorShim* self = new (ELeave) CDESEncryptorShim();
sl@0: 	CleanupStack::PushL(self);
sl@0: 	self->ConstructL(aKey);
sl@0: 	// DES only used 7 bits out of every key byte
sl@0: 	TCrypto::IsSymmetricWeakEnoughL(BytesToBits(aKey.Size()) - aKey.Size());
sl@0: 	return self;
sl@0: 	}
sl@0: 
sl@0: CDESEncryptorShim::CDESEncryptorShim()
sl@0: 	{
sl@0: 	}
sl@0: 
sl@0: CDESEncryptorShim::~CDESEncryptorShim()
sl@0: 	{
sl@0: 	delete iSymmetricCipherImpl;
sl@0: 	delete iKey;			
sl@0: 	}	
sl@0: 
sl@0: void CDESEncryptorShim::ConstructL(const TDesC8& aKey)
sl@0: 	{
sl@0: 	TKeyProperty keyProperty = {KDesUid, 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: 	CSymmetricCipherFactory::CreateSymmetricCipherL(
sl@0: 											iSymmetricCipherImpl,
sl@0: 											KDesUid,
sl@0: 											*iKey,
sl@0: 											KCryptoModeEncryptUid,
sl@0: 											KOperationModeECBUid,
sl@0: 											KPaddingModeNoneUid,
sl@0: 											NULL);
sl@0: 	}		
sl@0: 
sl@0: TInt CDESEncryptorShim::BlockSize() const
sl@0: 	{
sl@0: 	// SPI returns block size in BITS
sl@0: 	return BitsToBytes(iSymmetricCipherImpl->BlockSize());
sl@0: 	}	
sl@0: 
sl@0: TInt CDESEncryptorShim::KeySize() const
sl@0: 	{
sl@0: 	return iSymmetricCipherImpl->KeySize();
sl@0: 	}	
sl@0: 
sl@0: void CDESEncryptorShim::Transform(TDes8& aBlock)
sl@0: 	{
sl@0: 	iOutputBlock.Zero();
sl@0: 	TRAP_IGNORE(iSymmetricCipherImpl->ProcessL(aBlock, iOutputBlock);)
sl@0: 	aBlock = iOutputBlock;
sl@0: 	}
sl@0: 
sl@0: void CDESEncryptorShim::Reset()
sl@0: 	{
sl@0: 	iSymmetricCipherImpl->Reset();
sl@0: 	}	
sl@0: 
sl@0: TInt CDESEncryptorShim::Extension_(TUint aExtensionId, TAny*& a0, TAny* /*a1*/)
sl@0: 	{
sl@0: 	TInt ret(KErrNotSupported);
sl@0: 	
sl@0: 	if (CryptoSpi::KSymmetricCipherInterface == aExtensionId && iSymmetricCipherImpl)
sl@0: 		{
sl@0: 		a0=iSymmetricCipherImpl;
sl@0: 		ret=KErrNone;	
sl@0: 		}		
sl@0: 	return ret;
sl@0: 	}	
sl@0: 
sl@0: // CDESDecryptorShim ////////////////////////////////////////////////////////
sl@0: CDESDecryptorShim* CDESDecryptorShim::NewL(const TDesC8& aKey)
sl@0: 	{
sl@0: 	CDESDecryptorShim* self = CDESDecryptorShim::NewLC(aKey);
sl@0: 	CleanupStack::Pop(self);
sl@0: 	return self;
sl@0: 	}
sl@0: 
sl@0: 
sl@0: CDESDecryptorShim* CDESDecryptorShim::NewLC(const TDesC8& aKey)
sl@0: 	{
sl@0: 	CDESDecryptorShim* self = new (ELeave) CDESDecryptorShim();
sl@0: 	CleanupStack::PushL(self);
sl@0: 	self->ConstructL(aKey);
sl@0: 	// DES only used 7 bits out of every key byte
sl@0: 	TCrypto::IsSymmetricWeakEnoughL(BytesToBits(aKey.Size()) - aKey.Size());
sl@0: 	return self;
sl@0: 	}
sl@0: 
sl@0: CDESDecryptorShim::CDESDecryptorShim()
sl@0: 	{	
sl@0: 	}
sl@0: 
sl@0: CDESDecryptorShim::~CDESDecryptorShim()
sl@0: 	{
sl@0: 	delete iSymmetricCipherImpl;
sl@0: 	delete iKey;			
sl@0: 	}
sl@0: 
sl@0: 
sl@0: void CDESDecryptorShim::ConstructL(const TDesC8& aKey)
sl@0: 	{
sl@0: 	TKeyProperty keyProperty = {KDesUid, 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: 	CSymmetricCipherFactory::CreateSymmetricCipherL(
sl@0: 											iSymmetricCipherImpl,
sl@0: 											KDesUid,
sl@0: 											*iKey,
sl@0: 											KCryptoModeDecryptUid,
sl@0: 											KOperationModeECBUid,
sl@0: 											KPaddingModeNoneUid,
sl@0: 											NULL);	
sl@0: 	}	
sl@0: 
sl@0: TInt CDESDecryptorShim::BlockSize() const
sl@0: 	{
sl@0: 	// SPI returns block size in BITS
sl@0: 	return BitsToBytes(iSymmetricCipherImpl->BlockSize());
sl@0: 	}
sl@0: 	
sl@0: TInt CDESDecryptorShim::KeySize() const
sl@0: 	{
sl@0: 	return iSymmetricCipherImpl->KeySize();
sl@0: 	}	
sl@0: 
sl@0: void CDESDecryptorShim::Transform(TDes8& aBlock)
sl@0: 	{
sl@0: 	iOutputBlock.Zero();	
sl@0: 	TRAP_IGNORE(iSymmetricCipherImpl->ProcessL(aBlock, iOutputBlock);)
sl@0: 	aBlock = iOutputBlock;	
sl@0: 	}
sl@0: 
sl@0: void CDESDecryptorShim::Reset()
sl@0: 	{
sl@0: 	iSymmetricCipherImpl->Reset();
sl@0: 	}
sl@0: 
sl@0: TInt CDESDecryptorShim::Extension_(TUint aExtensionId, TAny*& a0, TAny* /*a1*/)
sl@0: 	{
sl@0: 	TInt ret(KErrNotSupported);
sl@0: 	
sl@0: 	if (CryptoSpi::KSymmetricCipherInterface == aExtensionId && iSymmetricCipherImpl)
sl@0: 		{
sl@0: 		a0=iSymmetricCipherImpl;
sl@0: 		ret=KErrNone;	
sl@0: 		}		
sl@0: 	return ret;
sl@0: 	}