sl@0: /*
sl@0: * Copyright (c) 2005-2009 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: */
sl@0: 
sl@0: #include <e32std.h>
sl@0: #include <e32math.h>
sl@0: #include <e32debug.h>
sl@0: 
sl@0: #include "randomimpl.h"
sl@0: #include "pluginentry.h"
sl@0: #include "pluginconfig.h"
sl@0: #include "securityerr.h"
sl@0: 
sl@0: using namespace SoftwareCrypto;
sl@0: 
sl@0: CRandomImpl* CRandomImpl::NewL(void)
sl@0: 	{
sl@0: 	CRandomImpl* self = new(ELeave)CRandomImpl();
sl@0: 	return self;
sl@0: 	}
sl@0: 
sl@0: CRandomImpl* CRandomImpl::NewLC(void)
sl@0: 	{
sl@0: 	CRandomImpl* self = NewL();
sl@0: 	CleanupStack::PushL(self);
sl@0: 	return self;
sl@0: 	}
sl@0: 
sl@0: void CRandomImpl::GenerateRandomBytesL(TDes8& aDestination)
sl@0: 	{
sl@0: 	// Call the Math library to populate the buffer with random data.	
sl@0: 	TRAPD(err, Math::RandomL(aDestination));	
sl@0: 	if(err != KErrNone)
sl@0: 	    {
sl@0: 	    // As the end users are interested only in the security aspect of the output but not 
sl@0:         // the internal states, accordingly translate the kernel side error code if required.
sl@0:         err = (err == KErrNotReady) ? KErrNotSecure : err;
sl@0: 	    User::Leave(err);
sl@0: 	    }
sl@0: 	}
sl@0: 
sl@0: CRandomImpl::CRandomImpl(void)
sl@0: 	{
sl@0: 	}
sl@0: 
sl@0: void CRandomImpl::GetCharacteristicsL(const TCharacteristics*& aPluginCharacteristics)
sl@0: 	{
sl@0: 	TInt randomNum = sizeof(KRandomCharacteristics)/sizeof(TRandomCharacteristics*);
sl@0: 	for (TInt i = 0; i < randomNum; i++)
sl@0: 		{
sl@0: 		if (KRandomCharacteristics[i]->cmn.iImplementationUID == ImplementationUid().iUid)
sl@0: 			{
sl@0: 			aPluginCharacteristics = KRandomCharacteristics[i];
sl@0: 			break;
sl@0: 			}
sl@0: 		}
sl@0: 	}
sl@0: 
sl@0: CExtendedCharacteristics* CRandomImpl::CreateExtendedCharacteristicsL()
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: const CExtendedCharacteristics* CRandomImpl::GetExtendedCharacteristicsL()
sl@0: 	{
sl@0: 	return CRandomImpl::CreateExtendedCharacteristicsL();
sl@0: 	}
sl@0: 
sl@0: TUid CRandomImpl::ImplementationUid() const
sl@0: 	{
sl@0: 	return KCryptoPluginRandomUid;
sl@0: 	}
sl@0: 
sl@0: CRandomImpl::~CRandomImpl()
sl@0: 	{
sl@0: 	}
sl@0: 
sl@0: void CRandomImpl::Close()
sl@0: 	{
sl@0: 	delete this;
sl@0: 	}
sl@0: 
sl@0: // All crypto plugins must implement this, to reset
sl@0: // hardware if required. Do nothing in this version
sl@0: void CRandomImpl::Reset()
sl@0: 	{
sl@0: 	}
sl@0: 
sl@0: // Methods which are not supported can be excluded from the coverage.
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: 
sl@0: TAny* CRandomImpl::GetExtension(TUid /*aExtensionId*/)
sl@0: 	{
sl@0: 	return NULL;
sl@0: 	}