?? myfilespy.c

?? 使用文件過濾驅動程序實現對文件的加密。在IFS 2003中編譯
?? C
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#include <ntifs.h>
//常量定義；
#define DEVICE_TYPE_GUI     100
#define DEVICE_TYPE_HOOK    101
#define DEVICE_IO_CTL_HOOK  1234
#define DEVICE_IO_CTL_SET   1111
#define DEVICE_IO_CTL_GET   2222
#define DEVICE_IO_CTL_KILL  3333
//字符串常量定義；
#define NT_DEVICE_NAME  L"\\Device\\MyFileSpy"
#define DOS_DEVICE_NAME L"\\DosDevices\\MyFileSpy"
#define DOS_DEVICE_DISK L"\\DosDevices\\C:\\"
//程序宏定義；
#define VALID_FAST_IO_DISPATCH_HANDLER( HookExt,Handler ) \
HookExt->DeviceType!=DEVICE_TYPE_GUI&&HookExt->FileSystem->DriverObject->FastIoDispatch&&HookExt->FileSystem->DriverObject->FastIoDispatch->Handler
//自定義結構；
typedef struct {    
	ULONG            DeviceType;
    PDEVICE_OBJECT   FileSystem;
}HOOK_EXTENSION, *PHOOK_EXTENSION;
//全局變量定義；
PDEVICE_OBJECT   GUIDevice;
PDEVICE_OBJECT   HookDevice;
//快速IO處理程序；
BOOLEAN
FastIoCheckifPossible( 
    IN PFILE_OBJECT FileObject, 
    IN PLARGE_INTEGER FileOffset, 
    IN ULONG Length, 
    IN BOOLEAN Wait, 
    IN ULONG LockKey, 
    IN BOOLEAN CheckForReadOperation,
    OUT PIO_STATUS_BLOCK IoStatus, 
    IN PDEVICE_OBJECT DeviceObject 
    ) 
{
     PHOOK_EXTENSION HookExt;
	 BOOLEAN         RetVal=FALSE;
	 DbgPrint("FastIoCheckifPossible\n");
	 //不明白的語句，檢測DeviceObject參數的有效性；
     if( !DeviceObject ) return RetVal;
	 HookExt=DeviceObject->DeviceExtension;
	 //繼續檢測程序；	
	 if(VALID_FAST_IO_DISPATCH_HANDLER(HookExt,FastIoCheckIfPossible)) return RetVal;	 	 
	 //調用原來的FastIODispatch;
     RetVal=HookExt->FileSystem->DriverObject->FastIoDispatch->FastIoCheckIfPossible( 
            FileObject, FileOffset, Length,
            Wait, LockKey, CheckForReadOperation, IoStatus, HookExt->FileSystem );
	 return RetVal;
}
BOOLEAN
FastIoRead( 
    IN PFILE_OBJECT FileObject, 
    IN PLARGE_INTEGER FileOffset, 
    IN ULONG Length, 
    IN BOOLEAN Wait, 
    IN ULONG LockKey, 
    OUT PVOID Buffer,
    OUT PIO_STATUS_BLOCK IoStatus, 
    IN PDEVICE_OBJECT DeviceObject 
    )
{
	 PHOOK_EXTENSION HookExt;
	 BOOLEAN         RetVal=FALSE;
	 DbgPrint("FastIoRead\n");
	 //不明白的語句，檢測DeviceObject參數的有效性；
     if( !DeviceObject ) return RetVal;
	 HookExt=DeviceObject->DeviceExtension;
	 //繼續檢測程序；	
	 if(VALID_FAST_IO_DISPATCH_HANDLER(HookExt,FastIoRead)) return RetVal;	 	 
	 //調用原來的FastIODispatch;
     RetVal=HookExt->FileSystem->DriverObject->FastIoDispatch->FastIoRead( 
            FileObject, FileOffset, Length,
            Wait, LockKey, Buffer, IoStatus, HookExt->FileSystem );
	 return RetVal;
}
BOOLEAN  
FastIoWrite( 
    IN PFILE_OBJECT FileObject, 
    IN PLARGE_INTEGER FileOffset,
    IN ULONG Length, 
    IN BOOLEAN Wait, 
    IN ULONG LockKey, 
    IN PVOID Buffer,
    OUT PIO_STATUS_BLOCK IoStatus, 
    IN PDEVICE_OBJECT DeviceObject 
    )
{
	 PHOOK_EXTENSION HookExt;
	 BOOLEAN         RetVal=FALSE;
	 DbgPrint("FastIoWrite\n");
	 //不明白的語句，檢測DeviceObject參數的有效性；
     if( !DeviceObject ) return RetVal;
	 HookExt=DeviceObject->DeviceExtension;
	 //繼續檢測程序；	
	 if(VALID_FAST_IO_DISPATCH_HANDLER(HookExt,FastIoWrite)) return RetVal;	 	 
	 //調用原來的FastIODispatch;
     RetVal=HookExt->FileSystem->DriverObject->FastIoDispatch->FastIoWrite( 
            FileObject, FileOffset, Length,
            Wait, LockKey, Buffer, IoStatus, HookExt->FileSystem );
	 return RetVal;
}
BOOLEAN  
FastIoQueryBasicInfo( 
    IN PFILE_OBJECT FileObject, 
    IN BOOLEAN Wait, 
    OUT PFILE_BASIC_INFORMATION Buffer,
    OUT PIO_STATUS_BLOCK IoStatus, 
    IN PDEVICE_OBJECT DeviceObject 
    )
{
	 PHOOK_EXTENSION HookExt;
	 BOOLEAN         RetVal=FALSE;
	 DbgPrint("FastIoQueryBasicInfo\n");
	 //不明白的語句，檢測DeviceObject參數的有效性；
      if( !DeviceObject ) return RetVal;
	 HookExt=DeviceObject->DeviceExtension;
	 //繼續檢測程序；	
	 if(VALID_FAST_IO_DISPATCH_HANDLER(HookExt,FastIoQueryBasicInfo)) return RetVal;	 	 
	 //調用原來的FastIODispatch;
     RetVal=HookExt->FileSystem->DriverObject->FastIoDispatch->FastIoQueryBasicInfo( 
            FileObject, Wait, Buffer, IoStatus, HookExt->FileSystem );
	 return RetVal;
}
BOOLEAN  
FastIoQueryStandardInfo( 
    IN PFILE_OBJECT FileObject, 
    IN BOOLEAN Wait, 
    OUT PFILE_STANDARD_INFORMATION Buffer,
    OUT PIO_STATUS_BLOCK IoStatus, 
    IN PDEVICE_OBJECT DeviceObject 
    )
{
	 PHOOK_EXTENSION HookExt;
	 BOOLEAN         RetVal=FALSE;
	 DbgPrint("FastIoQueryBasicInfo\n");
	 //不明白的語句，檢測DeviceObject參數的有效性；
     if( !DeviceObject ) return RetVal;
	 HookExt=DeviceObject->DeviceExtension;
	 //繼續檢測程序；	
	 if(VALID_FAST_IO_DISPATCH_HANDLER(HookExt,FastIoQueryStandardInfo)) return RetVal;	 	 
	 //調用原來的FastIODispatch;
     RetVal=HookExt->FileSystem->DriverObject->FastIoDispatch->FastIoQueryStandardInfo( 
            FileObject, Wait, Buffer, IoStatus, HookExt->FileSystem );
	 return RetVal;	 
}
BOOLEAN  
FastIoLock( 
    IN PFILE_OBJECT FileObject, 
    IN PLARGE_INTEGER FileOffset,
    IN PLARGE_INTEGER Length, 
    PEPROCESS ProcessId, 
    ULONG Key,
    BOOLEAN FailImmediately, 
    BOOLEAN ExclusiveLock,
    OUT PIO_STATUS_BLOCK IoStatus, 
    IN PDEVICE_OBJECT DeviceObject
    )
{
	PHOOK_EXTENSION HookExt;
	BOOLEAN         RetVal=FALSE;
	DbgPrint("FastIoLock\n");
	if( !DeviceObject ) return RetVal;
	HookExt=DeviceObject->DeviceExtension;
	//繼續檢測程序；	
	if(VALID_FAST_IO_DISPATCH_HANDLER(HookExt,FastIoLock)) return RetVal;	 	 
	//調用原來的FastIODispatch;
	RetVal = HookExt->FileSystem->DriverObject->FastIoDispatch->FastIoLock( 
            FileObject, FileOffset, Length, ProcessId, Key, FailImmediately, 
            ExclusiveLock, IoStatus, HookExt->FileSystem );
	return RetVal;
}
BOOLEAN  
FastIoUnlockSingle( 
    IN PFILE_OBJECT FileObject, 
    IN PLARGE_INTEGER FileOffset,
    IN PLARGE_INTEGER Length, 
    PEPROCESS ProcessId, 
    ULONG Key,
    OUT PIO_STATUS_BLOCK IoStatus, 
    IN PDEVICE_OBJECT DeviceObject 
    )
{
	PHOOK_EXTENSION HookExt;
	BOOLEAN         RetVal=FALSE;
	DbgPrint("FastIoUnlockSingle\n");
	if( !DeviceObject ) return RetVal;
	HookExt=DeviceObject->DeviceExtension;
	//繼續檢測程序；	
	if(VALID_FAST_IO_DISPATCH_HANDLER(HookExt,FastIoUnlockSingle)) return RetVal;	 	 
	//調用原來的FastIODispatch;
	RetVal = HookExt->FileSystem->DriverObject->FastIoDispatch->FastIoUnlockSingle(
            FileObject, FileOffset, Length, ProcessId, Key, 
            IoStatus, HookExt->FileSystem );
	return RetVal;
}
BOOLEAN  
FastIoUnlockAll( 
    IN PFILE_OBJECT FileObject, 
    PEPROCESS ProcessId,
    OUT PIO_STATUS_BLOCK IoStatus, 
    IN PDEVICE_OBJECT DeviceObject 
    )
{
	PHOOK_EXTENSION HookExt;
	BOOLEAN         RetVal=FALSE;
	DbgPrint("FastIoUnlockAll\n");
	if( !DeviceObject ) return RetVal;
	HookExt=DeviceObject->DeviceExtension;
	//繼續檢測程序；	
	if(VALID_FAST_IO_DISPATCH_HANDLER(HookExt,FastIoUnlockAll)) return RetVal;	 	 
	//調用原來的FastIODispatch;
	RetVal = HookExt->FileSystem->DriverObject->FastIoDispatch->FastIoUnlockAll( 
             FileObject, ProcessId, IoStatus, HookExt->FileSystem );
	return RetVal;
}
BOOLEAN  
FastIoUnlockAllByKey( 
    IN PFILE_OBJECT FileObject, 
    PEPROCESS ProcessId, ULONG Key,
    OUT PIO_STATUS_BLOCK IoStatus, 
    IN PDEVICE_OBJECT DeviceObject 
    )
{
	PHOOK_EXTENSION HookExt;
	BOOLEAN         RetVal=FALSE;
	DbgPrint("FastIoUnlockAllByKey\n");
	if( !DeviceObject ) return RetVal;
	HookExt=DeviceObject->DeviceExtension;
	//繼續檢測程序；	
	if(VALID_FAST_IO_DISPATCH_HANDLER(HookExt,FastIoUnlockAllByKey)) return RetVal;	 	 
	//調用原來的FastIODispatch;
	return RetVal;
}
BOOLEAN  
FastIoDeviceControl( 
    IN PFILE_OBJECT FileObject, 
    IN BOOLEAN Wait,
    IN PVOID InputBuffer, 
    IN ULONG InputBufferLength, 
    OUT PVOID OutbufBuffer, 
    IN ULONG OutputBufferLength, 
    IN ULONG IoControlCode,
    OUT PIO_STATUS_BLOCK IoStatus, 
    IN PDEVICE_OBJECT DeviceObject 
    )
{
	PHOOK_EXTENSION HookExt;
	BOOLEAN         RetVal=FALSE;
	DbgPrint("FastIoDeviceControl\n");
	if( !DeviceObject ) return RetVal;
	HookExt=DeviceObject->DeviceExtension;
	//繼續檢測程序；	
	if(VALID_FAST_IO_DISPATCH_HANDLER(HookExt,FastIoDeviceControl)) return RetVal;	 	 
	//調用原來的FastIODispatch;
	return RetVal;
}
VOID     
FastIoAcquireFile( 
    PFILE_OBJECT FileObject 
    )
{
	PHOOK_EXTENSION HookExt;
	BOOLEAN         RetVal=FALSE;
	DbgPrint("FastIoAcquireFile\n");
	//if( !DeviceObject ) return RetVal;
	//HookExt=DeviceObject->DeviceExtension;
	return;
}
VOID     
FastIoReleaseFile(
    PFILE_OBJECT FileObject 
    )
{
	PHOOK_EXTENSION HookExt;
	BOOLEAN         RetVal=FALSE;
	DbgPrint("FastIoReleaseFile\n");
	//if( !DeviceObject ) return RetVal;
	//HookExt=DeviceObject->DeviceExtension;
	return;
}
VOID     
FastIoDetachDevice( 
    PDEVICE_OBJECT SourceDevice, 
    PDEVICE_OBJECT TargetDevice 
    )
{
	PHOOK_EXTENSION HookExt;
	BOOLEAN         RetVal=FALSE;
	DbgPrint("FastIoDetachDevice\n");
	//if( !DeviceObject ) return RetVal;
	//HookExt=DeviceObject->DeviceExtension;
	return;
}
// These are new NT 4.0 Fast I/O calls
BOOLEAN  
FastIoQueryNetworkOpenInfo(
    IN PFILE_OBJECT FileObject,
    IN BOOLEAN Wait, 
    OUT struct _FILE_NETWORK_OPEN_INFORMATION *Buffer,
    OUT struct _IO_STATUS_BLOCK *IoStatus, 
    IN PDEVICE_OBJECT DeviceObject 
    )
{
	PHOOK_EXTENSION HookExt;
	BOOLEAN         RetVal=FALSE;
	DbgPrint("FastIoQueryNetworkOpenInfo\n");
	if( !DeviceObject ) return RetVal;
	HookExt=DeviceObject->DeviceExtension;
	return RetVal;
}
NTSTATUS 
FastIoAcquireForModWrite( 
    IN PFILE_OBJECT FileObject,
    IN PLARGE_INTEGER EndingOffset, 
    OUT struct _ERESOURCE **ResourceToRelease,
    IN PDEVICE_OBJECT DeviceObject 
    )
{
	PHOOK_EXTENSION HookExt;
	BOOLEAN         RetVal=FALSE;
	DbgPrint("FastIoAcquireForModWrite\n");
	if( !DeviceObject ) return RetVal;
	HookExt=DeviceObject->DeviceExtension;
	return RetVal;
}
BOOLEAN  
FastIoMdlRead( 
    IN PFILE_OBJECT FileObject,
    IN PLARGE_INTEGER FileOffset, 
    IN ULONG Length,
    IN ULONG LockKey, 
    OUT PMDL *MdlChain, 
    OUT PIO_STATUS_BLOCK IoStatus,
    IN PDEVICE_OBJECT DeviceObject 
	)
{
	PHOOK_EXTENSION HookExt;
	BOOLEAN         RetVal=FALSE;
	DbgPrint("FastIoMdlRead\n");
	if( !DeviceObject ) return RetVal;
	HookExt=DeviceObject->DeviceExtension;
	return RetVal;
}
BOOLEAN  
FastIoMdlReadComplete( 
    IN PFILE_OBJECT FileObject,
    IN PMDL MdlChain, 
    IN PDEVICE_OBJECT DeviceObject 
    )
{
	PHOOK_EXTENSION HookExt;
	BOOLEAN         RetVal=FALSE;
	DbgPrint("FastIoMdlReadComplete\n");
	if( !DeviceObject ) return RetVal;
	HookExt=DeviceObject->DeviceExtension;
	return RetVal;
}
BOOLEAN  
FastIoPrepareMdlWrite( 
    IN PFILE_OBJECT FileObject,
    IN PLARGE_INTEGER FileOffset, 
    IN ULONG Length, 
    IN ULONG LockKey,
    OUT PMDL *MdlChain, 
    OUT PIO_STATUS_BLOCK IoStatus,
    IN PDEVICE_OBJECT DeviceObject
    )
{
	PHOOK_EXTENSION HookExt;
	BOOLEAN         RetVal=FALSE;
	DbgPrint("FastIoPrepareMdlWrite\n");
	if( !DeviceObject ) return RetVal;
	HookExt=DeviceObject->DeviceExtension;
	return RetVal;
}
BOOLEAN  
FastIoMdlWriteComplete( 
    IN PFILE_OBJECT FileObject,
    IN PLARGE_INTEGER FileOffset, 
    IN PMDL MdlChain,
    IN PDEVICE_OBJECT DeviceObject 
    )
{
	PHOOK_EXTENSION HookExt;
	BOOLEAN         RetVal=FALSE;
	DbgPrint("FastIoMdlWriteComplete\n");
	if( !DeviceObject ) return RetVal;
	HookExt=DeviceObject->DeviceExtension;
	return RetVal;
}
BOOLEAN  
FastIoReadCompressed( 
    IN PFILE_OBJECT FileObject,
    IN PLARGE_INTEGER FileOffset, 
    IN ULONG Length,
    IN ULONG LockKey, 
    OUT PVOID Buffer, 
    OUT PMDL *MdlChain,
    OUT PIO_STATUS_BLOCK IoStatus,
    OUT struct _COMPRESSED_DATA_INFO *CompressedDataInfo,
    IN ULONG CompressedDataInfoLength, 
    IN PDEVICE_OBJECT DeviceObject 
    )
{
	PHOOK_EXTENSION HookExt;
	BOOLEAN         RetVal=FALSE;
	DbgPrint("FastIoReadCompressed\n");
	if( !DeviceObject ) return RetVal;
	HookExt=DeviceObject->DeviceExtension;
	return RetVal;
}
BOOLEAN  
FastIoWriteCompressed( 
    IN PFILE_OBJECT FileObject,
    IN PLARGE_INTEGER FileOffset, 
    IN ULONG Length,
    IN ULONG LockKey, 
    IN PVOID Buffer, 
    OUT PMDL *MdlChain,
    OUT PIO_STATUS_BLOCK IoStatus,
    IN struct _COMPRESSED_DATA_INFO *CompressedDataInfo,
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