WindowsIdentity identity = new WindowsIdentity(accessToken);
WindowsImpersonationContext context = identity.Impersonate();
...
context.Undo();
Where do i declare a administraotr UserName and Passowrd ?
the accessToken param doesn't help me too much...
Do I have to import DLL'S for it ?
You need to get the user's token. Use the p/invoke LogonUser
from the advapi32.dll:
[DllImport("advapi32.dll", SetLastError = true)]
public static extern bool LogonUser(
string lpszUsername,
string lpszDomain,
string lpszPassword,
int dwLogonType,
int dwLogonProvider,
out IntPtr phToken);
Example:
IntPtr userToken = IntPtr.Zero;
bool success = External.LogonUser(
"john.doe",
"domain.com",
"MyPassword",
(int) AdvApi32Utility.LogonType.LOGON32_LOGON_INTERACTIVE, //2
(int) AdvApi32Utility.LogonProvider.LOGON32_PROVIDER_DEFAULT, //0
out userToken);
if (!success)
{
throw new SecurityException("Logon user failed");
}
using (WindowsIdentity.Impersonate(userToken))
{
// do the stuff with john.doe's credentials
}
its exactly the accesstoken you have to use. to get it you need to call the LogonUser method:
oops didnt realise that i just have the VB.net code just here. imagine it in C# ;)
here in c#
external method declaration:
Private Declare Auto Function LogonUser Lib "advapi32.dll" (ByVal lpszUsername As [String], _
ByVal lpszDomain As [String], ByVal lpszPassword As [String], _
ByVal dwLogonType As Integer, ByVal dwLogonProvider As Integer, _
ByRef phToken As IntPtr) As Boolean
and the execution:
_Token = New IntPtr(0)
Const LOGON32_PROVIDER_DEFAULT As Integer = 0
'This parameter causes LogonUser to create a primary token.
Const LOGON32_LOGON_INTERACTIVE As Integer = 2
Const LOGON32_LOGON_NEWCREDENTIALS As Integer = 9
_Token = IntPtr.Zero
' Call LogonUser to obtain a handle to an access token.
Dim returnValue As Boolean = LogonUser(_User, _Domain, _Password, LOGON32_LOGON_NEWCREDENTIALS, LOGON32_PROVIDER_DEFAULT, _Token)
If False = returnValue Then
Dim ret As Integer = Marshal.GetLastWin32Error()
Console.WriteLine("LogonUser failed with error code : {0}", ret)
Throw New System.ComponentModel.Win32Exception(ret)
End If
_Identity = New WindowsIdentity(_Token)
_Context = _Identity.Impersonate()
You need to P/invoke the LogonUser()
API. That accepts username, domain and password and returns a token.