sl@0: /*
sl@0: * Copyright (c) 2007-2009 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:  @file
sl@0:  @internalComponent
sl@0:  @released
sl@0: */
sl@0: #include "rijndaelimpl.h"
sl@0: #include "keys.h"
sl@0: #include "pluginconfig.h"
sl@0: 
sl@0: using namespace HwCrypto;
sl@0: 
sl@0: const TUint KAESKeyBytes128 = 16;
sl@0: const TUint KAESKeyBytes192 = 24;
sl@0: const TUint KAESKeyBytes256 = 32;
sl@0: const TUint KAESBlockBytes = 16;
sl@0: 
sl@0: _LIT(KLddFileName,"cryptoldd.ldd");
sl@0: _LIT(KPddFileName,"crypto.h4.pdd");
sl@0: 
sl@0: 
sl@0: /* CRijndaelmpl*/
sl@0: CH4RijndaelImpl::CH4RijndaelImpl(
sl@0: 	TUid aCryptoMode,
sl@0: 	TUid aOperationMode,
sl@0: 	TUid aPadding) :
sl@0: 	CH4CipherImpl(KAESBlockBytes, aCryptoMode, aOperationMode, aPadding)
sl@0: 	{
sl@0: 	}
sl@0: 
sl@0: CH4RijndaelImpl* CH4RijndaelImpl::NewL(const CKey& aKey, TUid aCryptoMode,	TUid aOperationMode, TUid aPadding)
sl@0: 	{
sl@0: 	CH4RijndaelImpl* self = CH4RijndaelImpl::NewLC(aKey, aCryptoMode, aOperationMode, aPadding);
sl@0: 	CleanupStack::Pop(self);
sl@0: 	return self;
sl@0: 	}
sl@0: 	
sl@0: CH4RijndaelImpl* CH4RijndaelImpl::NewLC(const CKey& aKey, TUid aCryptoMode, TUid aOperationMode, TUid aPadding)
sl@0: 	{
sl@0: 	CH4RijndaelImpl* self = new(ELeave) CH4RijndaelImpl(aCryptoMode, aOperationMode, aPadding);
sl@0: 	CleanupStack::PushL(self);
sl@0: 	self->ConstructL(aKey);
sl@0: 	return self;
sl@0: 	}
sl@0: 		
sl@0: CH4RijndaelImpl::~CH4RijndaelImpl()
sl@0: 	{
sl@0: 	iDriver.Close();
sl@0: 	}
sl@0: 	
sl@0: void CH4RijndaelImpl::ConstructL(const CKey& aKey)
sl@0: 	{
sl@0: 	// Load PDD
sl@0:     TInt r = User::LoadPhysicalDevice(KPddFileName);
sl@0: 	if((r != KErrNone) && (r != KErrAlreadyExists)) User::Leave(r);
sl@0: 
sl@0: 	// Load LDD
sl@0:     r = User::LoadLogicalDevice(KLddFileName);
sl@0: 	if((r != KErrNone) && (r != KErrAlreadyExists)) User::Leave(r);
sl@0: 
sl@0: 
sl@0: 	CH4CipherImpl::ConstructL(aKey);			
sl@0: 	}
sl@0: 
sl@0: TUid CH4RijndaelImpl::ImplementationUid() const
sl@0: 	{
sl@0: 	return KCryptoPluginAesUid;
sl@0: 	}
sl@0: 
sl@0: const CExtendedCharacteristics* CH4RijndaelImpl::GetExtendedCharacteristicsL()
sl@0: 	{
sl@0: 	return StaticGetExtendedCharacteristicsL();
sl@0: 	}
sl@0: 
sl@0: CExtendedCharacteristics* CH4RijndaelImpl::StaticGetExtendedCharacteristicsL()
sl@0: 	{
sl@0: 	// All Symbian software plug-ins have unlimited concurrency, cannot be reserved
sl@0: 	// for exclusive use and are not CERTIFIED to be standards compliant.
sl@0: 	return CExtendedCharacteristics::NewL(KMaxTInt, EFalse);
sl@0: 	}
sl@0: 
sl@0: 	
sl@0: TBool CH4RijndaelImpl::IsValidKeyLength(TInt aKeyBytes) const
sl@0: 	{
sl@0: 	switch(aKeyBytes)
sl@0: 		{
sl@0: 		case KAESKeyBytes128:
sl@0: 		case KAESKeyBytes192:
sl@0: 		case KAESKeyBytes256:
sl@0: 			return ETrue;
sl@0: 		default:
sl@0: 			return EFalse;
sl@0: 		}			
sl@0: 	}
sl@0: 
sl@0: void CH4RijndaelImpl::DoSetupL()
sl@0: 	{
sl@0: 	iDriver.Close();
sl@0: 	User::LeaveIfError(iDriver.Open());
sl@0: 
sl@0: 	TBool encrypt = (iCryptoMode.iUid == KCryptoModeEncrypt);
sl@0: 	RCryptoDriver::TChainingMode chainingMode = (iOperationMode.iUid == KOperationModeCBC) ? (RCryptoDriver::ECbcMode) : (RCryptoDriver::EEcbMode);
sl@0: 	User::LeaveIfError(iDriver.SetAesConfig(encrypt, chainingMode, iKey->Des(), iIv));
sl@0: 	}
sl@0: 
sl@0: void CH4RijndaelImpl::DoWriteL(const TUint8* aBuffer, TUint aNumBytes)
sl@0: 	{
sl@0: 	TPtrC8 ptr(aBuffer, aNumBytes);
sl@0: 
sl@0:     TRequestStatus status;
sl@0: 	iDriver.AesWrite(status, ptr);
sl@0: 	User::WaitForRequest(status);
sl@0: 	User::LeaveIfError(status.Int());
sl@0: 	}
sl@0: 
sl@0: void CH4RijndaelImpl::DoReadL(TDes8 &aBuffer, TUint32 aLength)
sl@0: 	{
sl@0:     TRequestStatus status;
sl@0: 	iDriver.AesRead(status, aBuffer, aLength);
sl@0: 	User::WaitForRequest(status);
sl@0: 	User::LeaveIfError(status.Int());
sl@0: 	}
sl@0: 
sl@0: 
sl@0: 	
sl@0: // End of file