#include "ntddk.h"
#include "ntddkbd.h"
#include "stdio.h"
#define KEY_UP 1
#define KEY_DOWN 0
#define LCONTROL ((USHORT)0x1D)
#define CAPS_LOCK ((USHORT)0x3A)
PDEVICE_OBJECT HookDeviceObject;
PDEVICE_OBJECT kbdDevice;
NTSTATUS KSnifferDispatchRead( IN PDEVICE_OBJECT DeviceObject, IN PIRP Irp );
NTSTATUS KSnifferReadComplete( IN PDEVICE_OBJECT DeviceObject, IN PIRP Irp, IN PVOID Context );
NTSTATUS KSnifferDispatchGeneral(IN PDEVICE_OBJECT DeviceObject,IN PIRP Irp );
NTSTATUS DriverEntry(IN PDRIVER_OBJECT DriverObject,IN PUNICODE_STRING RegistryPath)
{
CCHAR ntNameBuffer[64];
STRING ntNameString;
UNICODE_STRING ntUnicodeString;
NTSTATUS status;
DbgPrint("DriverEntry \n");
DriverObject->MajorFunction[IRP_MJ_READ] = KSnifferDispatchRead;
DriverObject->MajorFunction[IRP_MJ_CREATE] =
DriverObject->MajorFunction[IRP_MJ_CLOSE] =
DriverObject->MajorFunction[IRP_MJ_FLUSH_BUFFERS] =
DriverObject->MajorFunction[IRP_MJ_CLEANUP] =
DriverObject->MajorFunction[IRP_MJ_DEVICE_CONTROL] = KSnifferDispatchGeneral;
sprintf( ntNameBuffer, "\\Device\\KeyboardClass0" );
RtlInitAnsiString( &ntNameString, ntNameBuffer );
RtlAnsiStringToUnicodeString( &ntUnicodeString, &ntNameString, TRUE );
status = IoCreateDevice( DriverObject,
0,
NULL,
FILE_DEVICE_KEYBOARD,
0,
FALSE,
&HookDeviceObject ); //建立一键盘类设备
if( !NT_SUCCESS(status) )
{
DbgPrint("Init Error\n");
RtlFreeUnicodeString( &ntUnicodeString );
return STATUS_SUCCESS;
}
HookDeviceObject->Flags |= DO_BUFFERED_IO;
status = IoAttachDevice( HookDeviceObject, &ntUnicodeString, &kbdDevice ); //连接我们的过滤设备到\\Device\\KeyboardClass0设备上
if( !NT_SUCCESS(status) )
{
DbgPrint("Connect with keyboard failed!\n");
IoDeleteDevice( HookDeviceObject );
RtlFreeUnicodeString( &ntUnicodeString );
return STATUS_SUCCESS;
}
RtlFreeUnicodeString( &ntUnicodeString );
DbgPrint("Successfully connected to keyboard device\n");
return STATUS_SUCCESS;
}
NTSTATUS KSnifferDispatchRead( IN PDEVICE_OBJECT DeviceObject, IN PIRP Irp ) //有按键按下时执行
{
PIO_STACK_LOCATION currentIrpStack = IoGetCurrentIrpStackLocation(Irp); //获取当前的IRP包
PIO_STACK_LOCATION nextIrpStack = IoGetNextIrpStackLocation(Irp);
*nextIrpStack = *currentIrpStack;
IoSetCompletionRoutine( Irp, KSnifferReadComplete, DeviceObject, TRUE, TRUE, TRUE ); //调用完成例程
return IoCallDriver( kbdDevice, Irp );
}
NTSTATUS KSnifferReadComplete( IN PDEVICE_OBJECT DeviceObject, IN PIRP Irp, IN PVOID Context )
{
PIO_STACK_LOCATION IrpSp;
PKEYBOARD_INPUT_DATA KeyData;
IrpSp = IoGetCurrentIrpStackLocation( Irp );
if( NT_SUCCESS( Irp->IoStatus.Status ) )
{
KeyData = Irp->AssociatedIrp.SystemBuffer;
DbgPrint("ScanCode: %x ", KeyData->MakeCode );
DbgPrint("%s\n", KeyData->Flags ? "Up" : "Down" ); //输出按键的扫描码
if( KeyData->MakeCode == CAPS_LOCK)
{
KeyData->MakeCode = LCONTROL; //修改按键
}
}
if( Irp->PendingReturned )
{
IoMarkIrpPending( Irp );
}
return Irp->IoStatus.Status;
}
NTSTATUS KSnifferDispatchGeneral( //通用事件处理例程
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp )
{
PIO_STACK_LOCATION currentIrpStack = IoGetCurrentIrpStackLocation(Irp);
PIO_STACK_LOCATION nextIrpStack = IoGetNextIrpStackLocation(Irp);
Irp->IoStatus.Status = STATUS_SUCCESS;
Irp->IoStatus.Information = 0;
if( DeviceObject == HookDeviceObject )
{
*nextIrpStack = *currentIrpStack;
return IoCallDriver( kbdDevice, Irp );
}
else
{
return STATUS_SUCCESS;
}
}
posted on 2008-08-22 10:49
黑色天使 阅读(2199)
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