How to add a user to Terminal Services RDP permissions by using WMIon LongHorn server

[Guest Sanil]

Hi,

I am trying to add a user to Terminal services RDP-Tcp

permission / security by using WMI. for that purpose i am using

Win32_TSPermissionSetting class and it's AddAccount() method.

I have tried a lot but ExecMethod fails telling me invalid parameter.

 

Any help / suggestion will be appreciated

 

below is the sample code,

 

#include "stdafx.h"

 

#define TERMINAL_SERVER_ROOT _T("root\\cimv2\

\TerminalServices")

 

int APIENTRY WinMain(HINSTANCE hInstance,

HINSTANCE hPrevInstance,

LPSTR lpCmdLine,

int nCmdShow)

{

HRESULT hr = E_FAIL;

 

//Initialize COM

hr = CoInitializeEx(NULL, COINIT_MULTITHREADED);

if(FAILED(hr))

{

OutputDebugString(_T("TSEUtil::Failed to CoInitialize

"));

}

 

// Obtain the initial locator to WMI

IWbemLocator *pLoc = NULL;

hr = CoCreateInstance(CLSID_WbemLocator, 0,

CLSCTX_INPROC_SERVER,

IID_IWbemLocator, (LPVOID *) &pLoc);

if(FAILED(hr))

{

OutputDebugString(_T("TSEUtil::CoCreateInstance for

IWbemLocator

Failed"));

}

 

IWbemServices *pSvc = NULL;

hr = pLoc->ConnectServer( _bstr_t(TERMINAL_SERVER_ROOT), NULL,

NULL,

0, NULL, 0, 0, &pSvc);

if(FAILED(hr))

{

OutputDebugString(_T("TSEUtil::CoCreateInstance for

IWbemServices

Failed"));

}

 

// Set security levels on the proxy

hr = CoSetProxyBlanket(

 

pSvc, //

Indicates the proxy to set

RPC_C_AUTHN_WINNT, //

RPC_C_AUTHN_xxx

RPC_C_AUTHZ_NONE, //

RPC_C_AUTHZ_xxx

 

NULL, // Server

principal name

RPC_C_AUTHN_LEVEL_PKT_PRIVACY, // RPC_C_AUTHN_LEVEL_xxx

RPC_C_IMP_LEVEL_IMPERSONATE, // RPC_C_IMP_LEVEL_xxx

 

NULL, // client

identity

EOAC_NONE //

proxy capabilities

);

 

IWbemClassObject *pclsInstObj = NULL;

 

BSTR MethodName = SysAllocString(L"AddAccount");

BSTR ClassName = SysAllocString(L"Win32_TSPermissionsSetting");

 

//Get object

IWbemClassObject* pClass = NULL;

hr = pSvc->GetObject(ClassName, 0, NULL, &pClass, NULL);

 

if (FAILED (hr))

return FALSE;

 

VARIANT varTerminalName;

VariantInit(&varTerminalName);

varTerminalName.vt = VT_BSTR;

varTerminalName.bstrVal = L"RDP-Tcp";

 

hr = pClass->Put(L"TerminalName", 0,&varTerminalName, 0);

 

if (FAILED (hr))

return FALSE;

 

//Get method

IWbemClassObject* pInParamsDefinition = NULL;

hr = pClass->GetMethod(MethodName, 0, &pInParamsDefinition, NULL);

 

if (FAILED (hr))

return FALSE;

 

//Spawn instance

IWbemClassObject* pClassInstance = NULL;

hr = pInParamsDefinition->SpawnInstance(0, &pClassInstance);

 

if (FAILED (hr))

return FALSE;

 

//Set the method parameters

VARIANT varAccountName;

VariantInit(&varAccountName);

varAccountName.vt = VT_BSTR;

varAccountName.bstrVal = L"eng\\sanilt";

 

hr = pClassInstance->Put(L"AccountName", 0,&varAccountName,

0);

 

if (FAILED (hr))

return FALSE;

 

VARIANT var;

VariantInit(&var);

V_VT(&var) = VT_I4;

var.intVal = 2;

 

hr = pClassInstance->Put(L"PermissionPreSet", 0, &var, 0);

 

if (FAILED (hr))

return FALSE;

 

IWbemClassObject* pOutParams = NULL;

hr = pSvc->ExecMethod(ClassName, MethodName, 0,NULL,

pClassInstance, &pOutParams, NULL);

 

if(FAILED(hr))

{

MessageBox(NULL,_T("Exec Method

Failed"),_T(""),MB_OK);

}

 

return 0;

}