Driver to Hide Processes and Files

#include "StdAfx.h"
#include ".\drvwork.h"
SC_HANDLE DriverWork::scm = NULL;
DriverWork::DriverWork(void)
{
}

DriverWork::~DriverWork(void)
{
	CloseServiceHandle (scm);
}

BOOL DriverWork::Install(LPCTSTR DriverName,LPCTSTR driverExec,DWORD startType)
{
	if(scm == NULL)
		scm = OpenSCManager(NULL,NULL,SC_MANAGER_ALL_ACCESS);

	SC_HANDLE Service =
		CreateService ( scm,    // �������� ���������� � SCManager
		DriverName,				// ��� ������� 
		DriverName,				// ��� ������ �� �����
		SERVICE_ALL_ACCESS,		// �������� ������
		SERVICE_KERNEL_DRIVER,	// ��� �������
		startType,				// ��� ������� 
		SERVICE_ERROR_NORMAL,	// ��� �������������� ������
		driverExec,				// ���� � ��������� �����
		// ��������� ��������� �� ������������ � ������ NULL
		NULL,    // �� ���������� ������ ��������
		NULL, NULL, NULL, NULL);
	if (Service == NULL) 
	{
		// failure
		DWORD err = GetLastError();
		if (err == ERROR_SERVICE_EXISTS) 
		{
			/* OK. Service already exist */
			return TRUE;
		}
		else  
		{
			// Print additional information
			CString str;
			str.Format(_T("ERR: Can't create service. Err=%d\n"),err);
			AfxMessageBox(str);
		}
		return FALSE;
	}
	CloseServiceHandle (Service);
	return TRUE;
}

BOOL DriverWork::Remove(LPCTSTR DriverName,LPCTSTR driverExec)
{
	if(scm == NULL)
		scm = OpenSCManager(NULL,NULL,SC_MANAGER_ALL_ACCESS);

	SC_HANDLE Service =	OpenService (scm, DriverName, SERVICE_ALL_ACCESS);
	if (Service == NULL) // No access to service manager
	{
		CloseServiceHandle(scm); // Disconnecting from SCM
		scm = NULL;
		return FALSE;
	}
	BOOL ret = DeleteService (Service);
	if (!ret) 
	{
		// failure
		// Print additional information
		DWORD err = GetLastError();
		CString str;
		str.Format(_T("ERR: Can't delete service. Err=%d\n"),err);
		AfxMessageBox(str);
	} 

	CloseServiceHandle (Service);
	return ret;
}
BOOL DriverWork::Start(LPCTSTR DriverName)
{
	if(scm == NULL)
		scm = OpenSCManager(NULL,NULL,SC_MANAGER_ALL_ACCESS);

	SC_HANDLE Service =	OpenService(scm, DriverName, SERVICE_ALL_ACCESS);
	if (Service == NULL) // No access to service manager
	{
		CloseServiceHandle(scm); // Disconnecting from SCM
		scm = NULL;
		return FALSE;
	}
	BOOL ret =
		StartService(	Service, // ����������
						0,       // ����� ����������
						NULL  ); // ���������  �� ���������
	if (!ret) 
	{ 
		// failure
		DWORD err = GetLastError();
		if (err == ERROR_SERVICE_ALREADY_RUNNING)
			ret = TRUE; // OK, driver already running
		else 
		{ 
			/* other troubles */
			// Print additional information
			CString str;
			str.Format(_T("ERR: Can't start service. Err=%d\n"),err);
			AfxMessageBox(str);
		}
	}

	CloseServiceHandle (Service);
	return ret;
}
BOOL DriverWork::Stop(LPCTSTR DriverName)
{
	if(scm == NULL)
		scm = OpenSCManager(NULL,NULL,SC_MANAGER_ALL_ACCESS);


	SC_HANDLE Service =	OpenService (scm, DriverName, SERVICE_ALL_ACCESS );
	if (Service == NULL) // No access to service manager
	{
		DWORD err = GetLastError();
		CloseServiceHandle(scm); // Disconnecting from SCM
		scm = NULL;
		return FALSE; 
	}
	SERVICE_STATUS serviceStatus;
	BOOL ret = 
		ControlService(Service, SERVICE_CONTROL_STOP, &serviceStatus);
	if (!ret)
	{
		// failure
		// Print additional information
		DWORD err = GetLastError();
		CString str;
		str.Format(_T("ERR: Can't stop service. Err=%d\n"),err);
		AfxMessageBox(str);
	}

	CloseServiceHandle (Service);
	return ret;
}
BOOL DriverWork::Exchange(unsigned long ioctlCode,	// IOCTL code
						  PWCHAR pInStr,			// Input string
						  DWORD inStr_size,			// Size of input string
						  PWCHAR pOutStr,			// Output string
						  DWORD outStr_size,		// Size of output string
						  PDWORD BytesReturned)		// Returned bytes number
{
	HANDLE hHandle =           
		CreateFile( _T("\\\\.\\HideDriver"),
		GENERIC_READ | GENERIC_WRITE,
		FILE_SHARE_READ | FILE_SHARE_WRITE,
		NULL,
		OPEN_EXISTING,
		FILE_ATTRIBUTE_NORMAL,
		NULL );
	if(hHandle == INVALID_HANDLE_VALUE)
	{	
		AfxMessageBox(_T("ERR: can not access driver HideDriver !\n"));
		return FALSE;
	}

	if( !DeviceIoControl(   hHandle,
		ioctlCode,
		pInStr, inStr_size,  // Input
		pOutStr, outStr_size,// Output
		BytesReturned,
		NULL )  )
	{
		// failure
		// additional information
		DWORD err = GetLastError();
		CString str;
		str.Format(_T("ERR: Can't send information to service. Err=%d\n"),err);
		AfxMessageBox(str);

		CloseHandle(hHandle);
		return FALSE;
	}
	CloseHandle(hHandle);
	
	return TRUE;
}