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: // f32test\plugins\encrypt\t_enchook.cpp
sl@0: // 
sl@0: //
sl@0: 
sl@0: #include "t_enchook.h"
sl@0: #include <f32pluginutils.h>
sl@0: #include "encrypt.h"
sl@0: 
sl@0: _LIT(KEncryptionPluginName, "This is a test encryption plugin");
sl@0: 
sl@0: 
sl@0: /**
sl@0: Leaving New function for the plugin
sl@0: @internalComponent
sl@0: */
sl@0: CTestEncryptionHook* CTestEncryptionHook::NewL()
sl@0: 	{
sl@0: 	return new(ELeave) CTestEncryptionHook;
sl@0: 	}
sl@0: 
sl@0: 
sl@0: /**
sl@0: Constructor for the plugin
sl@0: @internalComponent
sl@0: */
sl@0: CTestEncryptionHook::CTestEncryptionHook()
sl@0: 	{
sl@0: 	}
sl@0: 
sl@0: 
sl@0: /**
sl@0: The destructor for the test encryptplugin hook.  This would
sl@0: not be a part of a normal encryption plugin implementation as
sl@0: normal encryption plugins cannot be unloaded - it must be 
sl@0: provided in the test encryption plugin server so that it can
sl@0: be tested with the F32 test suite.
sl@0: @internalComponent
sl@0: */
sl@0: CTestEncryptionHook::~CTestEncryptionHook()
sl@0: 	{
sl@0: 	iFs.Close();
sl@0: 	}
sl@0: 
sl@0: /**
sl@0: Initialise the encryption plugin.
sl@0: @internalComponent
sl@0: */
sl@0: void CTestEncryptionHook::InitialiseL()
sl@0: 	{
sl@0: 	User::LeaveIfError(RegisterIntercept(EFsFileOpen,			EPreIntercept));
sl@0: 	User::LeaveIfError(RegisterIntercept(EFsFileRead,			EPrePostIntercept));
sl@0: //	User::LeaveIfError(RegisterIntercept(EFsFileWrite,			EPreIntercept));
sl@0: 
sl@0: 	User::LeaveIfError(iFs.Connect());
sl@0: 	}
sl@0: 
sl@0: /**
sl@0: @internalComponent
sl@0: */
sl@0: TInt CTestEncryptionHook::DoRequestL(TFsPluginRequest& aRequest)
sl@0: 	{
sl@0: 	TInt err = KErrNotSupported;
sl@0: 
sl@0: 	TInt function = aRequest.Function();
sl@0: 	
sl@0: 	iDrvNumber = aRequest.DriveNumber();
sl@0: 
sl@0: 	switch(function)
sl@0: 		{
sl@0: 		case EFsFileOpen:
sl@0: 			err = EncFileOpen(aRequest);
sl@0: 			break;
sl@0: 
sl@0: 		case EFsFileRead:
sl@0: 			// Post intercept does nothing except prove that it is possible and that no deadlock occurs.
sl@0: 			// In fact as this plugin always calls FileRead() when receiving a EFsFileRead, the file 
sl@0: 			// server should never call this plugin in post-intercept mode as deadlock would result).
sl@0: 			if (aRequest.IsPostOperation())
sl@0: 				ASSERT(0);
sl@0: 			else
sl@0: 				err = EncFileRead(aRequest);
sl@0: 			break;
sl@0: 
sl@0: 		default:
sl@0: 			break;
sl@0: 		}
sl@0: 
sl@0: 	return err;
sl@0: 	}
sl@0: 
sl@0: 
sl@0: /**
sl@0: @internalComponent
sl@0: */
sl@0: TInt CTestEncryptionHook::EncFileOpen(TFsPluginRequest& aRequest)
sl@0: 	{
sl@0: 	TFileName fileName;
sl@0: 
sl@0: 	
sl@0: 	
sl@0: //	TInt driveNumber = aRequest.DriveNumber();
sl@0: 	
sl@0: 	TInt err = GetName(&aRequest, fileName);
sl@0: 	if(err != KErrNone)
sl@0: 		return(err);
sl@0: 	
sl@0: //	err = ScanFile(fileName);
sl@0: 
sl@0: 	return err;
sl@0: 	}
sl@0: 
sl@0: 
sl@0: /**
sl@0: @internalComponent
sl@0: */
sl@0: TInt CTestEncryptionHook::EncFileRead(TFsPluginRequest& aRequest)
sl@0: 	{
sl@0: 	TFileName fileName;
sl@0: 	
sl@0: //	TInt driveNumber = aRequest.DriveNumber();
sl@0: 	
sl@0: 	TInt r = GetName(&aRequest, fileName);
sl@0: 	if(r != KErrNone)
sl@0: 		return(r);
sl@0: 
sl@0: 	TInt len, pos;
sl@0: 	r = GetFileAccessInfo(&aRequest, len, pos);
sl@0: 	if (r != KErrNone)
sl@0: 		return r;
sl@0: 
sl@0: 	TInt offset = 0;
sl@0: 	while(len > 0)
sl@0: 		{
sl@0: 		TInt readLen = Min(len, iFileBuf.MaxLength());
sl@0: 		// read from file
sl@0: 		TPtr8 ptr((TUint8*) iFileBuf.Ptr(), readLen, readLen);
sl@0: 		r = FileRead(aRequest, ptr, pos);
sl@0: 		if (r != KErrNone)
sl@0: 			return r;
sl@0: 		readLen = ptr.Length();
sl@0: 		if (readLen == 0)
sl@0: 			return KErrCompletion;
sl@0: 
sl@0: 		Decrypt(ptr);
sl@0: 
sl@0: 		// write back to client (may be an app or another plugin)
sl@0: 		r = ClientWrite(aRequest, ptr, offset);
sl@0: 		offset+= readLen;
sl@0: 		len-= readLen;
sl@0: 		pos+= readLen;
sl@0: 		}
sl@0: 	
sl@0: 	return KErrCompletion;
sl@0: 	}
sl@0: 
sl@0: 
sl@0: 
sl@0: /**
sl@0: @internalComponent
sl@0: */
sl@0: TInt CTestEncryptionHook::EncryptionPluginName(TDes& aName)
sl@0: 	{
sl@0: 	aName = KEncryptionPluginName;
sl@0: 	return KErrNone;
sl@0: 	}
sl@0: 
sl@0: 
sl@0: 
sl@0: 
sl@0: //factory functions
sl@0: 
sl@0: class CEncHookFactory : public CFsPluginFactory
sl@0: 	{
sl@0: public:
sl@0: 	CEncHookFactory();
sl@0: 	virtual TInt Install();			
sl@0: 	virtual CFsPlugin* NewPluginL();
sl@0: 	virtual CFsPlugin* NewPluginConnL();
sl@0: 	virtual TInt UniquePosition();
sl@0: 	};
sl@0: 
sl@0: /**
sl@0: Constructor for the plugin factory
sl@0: @internalComponent
sl@0: */
sl@0: CEncHookFactory::CEncHookFactory()
sl@0: 	{
sl@0: 	}
sl@0: 
sl@0: /**
sl@0: Install function for the plugin factory
sl@0: @internalComponent
sl@0: */
sl@0: TInt CEncHookFactory::Install()
sl@0: 	{
sl@0: 	iSupportedDrives = KPluginAutoAttach;
sl@0: 
sl@0: 	_LIT(KEncHookName,"EncHook");
sl@0: 	return(SetName(&KEncHookName));
sl@0: 	}
sl@0: 
sl@0: /**
sl@0: @internalComponent
sl@0: */
sl@0: TInt CEncHookFactory::UniquePosition()
sl@0: 	{
sl@0: 	return(0x4CC);
sl@0: 	}
sl@0: 
sl@0: /**
sl@0: Plugin factory function
sl@0: @internalComponent
sl@0: */
sl@0: CFsPlugin* CEncHookFactory::NewPluginL()
sl@0: 
sl@0: 	{
sl@0: 	return CTestEncryptionHook::NewL();
sl@0: 	}
sl@0: 
sl@0: /**
sl@0: Plugin factory function
sl@0: @internalComponent
sl@0: */
sl@0: CFsPlugin* CEncHookFactory::NewPluginConnL()
sl@0: 
sl@0: 	{
sl@0: 	return CTestEncryptionHook::NewL();
sl@0: 	}
sl@0: 
sl@0: /**
sl@0: Create a new Plugin
sl@0: @internalComponent
sl@0: */
sl@0: extern "C" {
sl@0: 
sl@0: EXPORT_C CFsPluginFactory* CreateFileSystem()
sl@0: 	{
sl@0: 	return(new CEncHookFactory());
sl@0: 	}
sl@0: }
sl@0: