/*

* Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description: 

* software hash base class implementation

* software hash base class implementation

*

*/

/**

 @file

*/

#include "softwarehashbase.h"

#include <cryptospi/hashplugin.h>

#include "pluginconfig.h"

#include "keys.h"

#include "md2impl.h"

#include "md5impl.h"

#include "md4impl.h"

#include "sha1impl.h"

#include "sha2impl.h"

#include "hmacimpl.h"

using namespace SoftwareCrypto;

CSoftwareHash* CSoftwareHash::NewL(TUid aAlgorithm, TUid aOperationMode, const CKey* aKey)

	{

	CSoftwareHash* self=NewLC(aAlgorithm, aOperationMode, aKey);

	CleanupStack::Pop();

	return self;

	}

CSoftwareHash* CSoftwareHash::NewL(TUid aAlgorithm)

	{

	CSoftwareHash* self=NewLC(aAlgorithm, CryptoSpi::KHashModeUid, NULL);

	CleanupStack::Pop();

	return self;

	}

CSoftwareHash* CSoftwareHash::NewLC(TUid aAlgorithm, TUid aOperationMode, const CKey* aKey)

	{

	CSoftwareHash* self=new (ELeave) CSoftwareHash();

	CleanupStack::PushL(self);

	self->ConstructL(aAlgorithm, aOperationMode, aKey);

	return self;

	}

CSoftwareHash::CSoftwareHash()

	{		

	}

CSoftwareHash::~CSoftwareHash()

	{

	if (iHashImpl)

		{

		iHashImpl->Close();			

		}

	if (iHmacImpl)

		{

		iHmacImpl->Close();

		}

	delete iKey;

	}

void CSoftwareHash::ConstructL(TUid aAlgorithm, TUid aOperationMode, const CKey* aKey)

	{

	//

	// Only Hash and Hmac mode are supported.

	//

	if (aOperationMode!=KHmacModeUid && aOperationMode!=KHashModeUid)

		{

		User::Leave(KErrNotSupported);			

		}

	//Set the key if there is one

	if (aKey)

		{

		SetKeyL(*aKey);

		}

	switch (aAlgorithm.iUid)

		{

	case KCryptoPluginMd2:

		{

		iHashImpl=CMD2Impl::NewL();

		}

		break;

	case KCryptoPluginMd5:

		{

		iHashImpl=CMD5Impl::NewL();

		}

		break;

	case KCryptoPluginMd4:

		{

		iHashImpl=CMD4Impl::NewL();

		}

		break;

	case KCryptoPluginSha1:

		{

		iHashImpl=CSHA1Impl::NewL();

		}

		break;

	case KCryptoPluginSha224:

	case KCryptoPluginSha256:

	case KCryptoPluginSha384:

	case KCryptoPluginSha512:

		{

		iHashImpl=CSHA2Impl::NewL(aAlgorithm.iUid);

		}

		break;

	default:

		User::Leave(KErrNotSupported);

		}

	SetOperationModeL(aOperationMode);

	}

void CSoftwareHash::SetOperationModeL(TUid aOperationMode)

	{

	switch (aOperationMode.iUid)

		{

	case KHmacMode:

		{

		//

		//Only create hmac implementation if there isn't one

		//

		if (!iHmacImpl)

			{

			if (iKey)

				{

				iHmacImpl=CHMacImpl::NewL(*iKey, iHashImpl);	

				}

			else

				{

				iHmacImpl=CHMacImpl::NewL(iHashImpl);

				}							

			}

		}

		break;

	case KHashMode:

		{

		Reset();	

		}

		break;

	default:

		User::Leave(KErrNotSupported);

		}

	//

	// Set the operation mode.

	//

	iOperationMode=aOperationMode;

	}

MSoftwareHash* CSoftwareHash::Impl()

	{

	MSoftwareHash* impl=NULL;

	if (iOperationMode==KHashModeUid)

		{

		impl=iHashImpl;

		}

	else if (iOperationMode==KHmacModeUid && iKey)

			{

			impl=iHmacImpl;

			}

	return impl;

	}

void CSoftwareHash::SetKeyL(const CKey& aKey)

	{

	Reset();

	delete iKey;

	iKey=CKey::NewL(aKey);

	if (iHmacImpl)

		{

		iHmacImpl->SetKeyL(aKey);

		}

	}

void CSoftwareHash::Reset()

	{

	if (iHashImpl)

		{

		iHashImpl->Reset();			

		}

	if (iHmacImpl)

		{

		iHmacImpl->Reset();			

		}

	}

void CSoftwareHash::Close()

	{

	delete this;

	}

void CSoftwareHash::GetCharacteristicsL(const TCharacteristics*& aPluginCharacteristics)

	{

	MSoftwareHash* impl=Impl();

	if (impl)

		{

		impl->GetCharacteristicsL(aPluginCharacteristics);			

		}

	else

		{

		User::Leave(KErrNotReady);

		}		

	}

const CExtendedCharacteristics* CSoftwareHash::GetExtendedCharacteristicsL()

	{

	MSoftwareHash* impl=Impl();

	if (!impl)

		{

		User::Leave(KErrNotReady);	

		}

	return impl->GetExtendedCharacteristicsL();

	}

TAny* CSoftwareHash::GetExtension(TUid aExtensionId)

	{

	MSoftwareHash* impl=Impl();

	if (impl)

		{

		return impl->GetExtension(aExtensionId);			

		}

	else

		{

		return NULL;	

		}

	}

TPtrC8 CSoftwareHash::Hash(const TDesC8& aMessage)

	{

	MSoftwareHash* impl=Impl();

	if (impl)

		{

		return impl->Hash(aMessage);			

		}

	else

		{

		return KNullDesC8();

		}

	}

void CSoftwareHash::Update(const TDesC8& aMessage)

	{

	MSoftwareHash* impl=Impl();

	if (impl)

		{

		return impl->Update(aMessage);

		}

	}

TPtrC8 CSoftwareHash::Final(const TDesC8& aMessage)

	{

	MSoftwareHash* impl=Impl();

	if (impl)

		{

		return impl->Final(aMessage);

		}

	else

		{

		return KNullDesC8();

		}

	}

MHash* CSoftwareHash::ReplicateL()

	{

	CSoftwareHash* that=new(ELeave)CSoftwareHash();

	CleanupStack::PushL(that);

	if (this->iKey)

		{

		that->iKey=CKey::NewL(*this->iKey);			

		}

	that->iOperationMode=this->iOperationMode;

	that->iHashImpl=static_cast<MSoftwareHash*>(this->iHashImpl->ReplicateL());

	if (this->iHmacImpl)

		{

		that->iHmacImpl=static_cast<MSoftwareHash*>(this->iHmacImpl->ReplicateL());			

		}

	CleanupStack::Pop();

	return that;

	}

MHash* CSoftwareHash::CopyL()

	{

	CSoftwareHash* that=new(ELeave)CSoftwareHash();

	CleanupStack::PushL(that);

	if (this->iKey)

		{

		that->iKey=CKey::NewL(*this->iKey);			

		}

	that->iOperationMode=this->iOperationMode;

	that->iHashImpl=static_cast<MSoftwareHash*>(this->iHashImpl->CopyL());

	if (this->iHmacImpl)

		{

		that->iHmacImpl=static_cast<MSoftwareHash*>(this->iHmacImpl->CopyL());

		}

	CleanupStack::Pop();

	return that;

	}