sl@0: /*
sl@0: * Copyright (c) 2006-2009 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: #include <e32def.h>
sl@0: #include "keys.h"
sl@0: #include "asymmetriccipherimpl.h"
sl@0: #include <cryptostrength.h>
sl@0: #include <cryptospi/cryptospidef.h>
sl@0: #include <cryptospi/plugincharacteristics.h>
sl@0: #include "pluginconfig.h"
sl@0: #include "common/inlines.h"
sl@0: 
sl@0: using namespace SoftwareCrypto;
sl@0: 
sl@0: CAsymmetricCipherImpl::CAsymmetricCipherImpl(
sl@0: 	TUid aCryptoMode,
sl@0: 	TUid aPaddingMode) :
sl@0: 	iCryptoMode(aCryptoMode),
sl@0: 	iPaddingMode(aPaddingMode)
sl@0: 	{
sl@0: 	}
sl@0: 
sl@0: void CAsymmetricCipherImpl::ConstructL(const CKey& aKey)
sl@0: 	{
sl@0: 	DoSetCryptoModeL(iCryptoMode);
sl@0: 	DoSetKeyL(aKey);
sl@0: 	DoSetPaddingModeL(iPaddingMode);
sl@0: 	}
sl@0: 	
sl@0: CAsymmetricCipherImpl::~CAsymmetricCipherImpl()
sl@0: 	{
sl@0: 	delete iKey;
sl@0: 	delete iPadding;
sl@0: 	}
sl@0: 		
sl@0: void CAsymmetricCipherImpl::Close()
sl@0: 	{
sl@0: 	delete this;
sl@0: 	}
sl@0: 	
sl@0: void CAsymmetricCipherImpl::Reset()
sl@0: 	{
sl@0: 	}
sl@0: 	
sl@0: TAny* CAsymmetricCipherImpl::GetExtension(TUid /*aExtensionId*/)
sl@0: 	{
sl@0: 	return 0;
sl@0: 	}
sl@0: 	
sl@0: void CAsymmetricCipherImpl::GetCharacteristicsL(const TAny*& aPluginCharacteristics)
sl@0: 	{
sl@0: 	TInt numCiphers = sizeof(KAsymmetricCipherCharacteristics)/sizeof(TAsymmetricCipherCharacteristics*);
sl@0: 	TInt32 implUid = ImplementationUid().iUid;
sl@0: 	for (TInt i = 0; i < numCiphers; ++i)
sl@0: 		{
sl@0: 		if (KAsymmetricCipherCharacteristics[i]->cmn.iImplementationUID == implUid)
sl@0: 			{
sl@0: 			aPluginCharacteristics = KAsymmetricCipherCharacteristics[i];
sl@0: 			break;
sl@0: 			}
sl@0: 		}
sl@0: 	}
sl@0: 
sl@0: void CAsymmetricCipherImpl::SetKeyL(const CKey& aKey)
sl@0: 	{
sl@0: 	DoSetKeyL(aKey);
sl@0: 	}
sl@0: 
sl@0: void CAsymmetricCipherImpl::DoSetKeyL(const CKey& aKey)
sl@0: 	{
sl@0: 	delete iKey;								// delete any previous key
sl@0: 	iKey = CKey::NewL(aKey);
sl@0: 	}
sl@0: 
sl@0: void CAsymmetricCipherImpl::SetCryptoModeL(TUid aCryptoMode)
sl@0: 	{
sl@0: 	DoSetCryptoModeL(aCryptoMode);
sl@0: 	Reset();
sl@0: 	}
sl@0: 	
sl@0: void CAsymmetricCipherImpl::DoSetCryptoModeL(TUid aCryptoMode)
sl@0: 	{
sl@0: 	switch (aCryptoMode.iUid)
sl@0: 		{
sl@0: 		case KCryptoModeEncrypt:
sl@0: 		case KCryptoModeDecrypt:
sl@0: 			break;
sl@0: 		default:
sl@0: 			User::Leave(KErrNotSupported);
sl@0: 		}
sl@0: 	iCryptoMode = aCryptoMode;
sl@0: 	}
sl@0: 
sl@0: void CAsymmetricCipherImpl::SetPaddingModeL(TUid aPaddingMode)
sl@0: 	{
sl@0: 	DoSetPaddingModeL(aPaddingMode);
sl@0: 	Reset();
sl@0: 	}
sl@0: 	
sl@0: void CAsymmetricCipherImpl::DoSetPaddingModeL(TUid aPaddingMode)
sl@0: 	{
sl@0: 	CPadding* padding(0);
sl@0: 	TInt padlength = 0;
sl@0: 	
sl@0: 	switch (iCryptoMode.iUid)
sl@0: 		{
sl@0: 		case KCryptoModeEncrypt:
sl@0: 			padlength = GetMaximumOutputLengthL();
sl@0: 			break;
sl@0: 		case KCryptoModeDecrypt:
sl@0: 			padlength = GetMaximumInputLengthL();
sl@0: 			break;
sl@0: 		}
sl@0: 		
sl@0: 	switch (aPaddingMode.iUid)
sl@0: 		{
sl@0: 		case KPaddingModeNone:
sl@0: 			padding = CPaddingNone::NewL(padlength);
sl@0: 			break;
sl@0: 		case KPaddingModePkcs1_v1_5_Encryption:
sl@0: 			padding = CPaddingPKCS1Encryption::NewL(padlength);
sl@0: 			break;
sl@0: 		default:
sl@0: 			User::Leave(KErrNotSupported);
sl@0: 		}
sl@0: 		
sl@0: 	delete iPadding;
sl@0: 	iPadding = padding;
sl@0: 	iPaddingMode = aPaddingMode;
sl@0: 	}
sl@0: 
sl@0: // Methods implemented in subclass. No coverage here.
sl@0: #ifdef _BullseyeCoverage
sl@0: #pragma suppress_warnings on
sl@0: #pragma BullseyeCoverage off
sl@0: #pragma suppress_warnings off
sl@0: #endif
sl@0: TInt CAsymmetricCipherImpl::GetMaximumOutputLengthL() const
sl@0: 	{
sl@0: 	// Override in subclass
sl@0: 	User::Leave(KErrNotSupported);
sl@0: 	return 0;
sl@0: 	}
sl@0: 
sl@0: TInt CAsymmetricCipherImpl::GetMaximumInputLengthL() const
sl@0: 	{
sl@0: 	// Override in subclass
sl@0: 	User::Leave(KErrNotSupported);
sl@0: 	return 0;
sl@0: 	}
sl@0: