private Impersonation(string username, string domain, string password, LogonType logonType, BuiltinUser builtinUser)
{
switch (builtinUser)
{
case BuiltinUser.None:
if (string.IsNullOrEmpty(username))
{
return;
}
break;
case BuiltinUser.LocalService:
username = "******";
break;
case BuiltinUser.NetworkService:
username = "******";
break;
}
IntPtr userToken = IntPtr.Zero;
IntPtr userTokenDuplication = IntPtr.Zero;
// Logon with user and get token.
bool loggedOn = NativeMethod.LogonUser(username, domain, password, logonType, LogonProvider.Default, out userToken);
if (loggedOn)
{
try
{
// Create a duplication of the usertoken, this is a solution
// for the known bug that is published under KB article Q319615.
if (NativeMethod.DuplicateToken(userToken, 2, ref userTokenDuplication))
{
// Create windows identity from the token and impersonate the user.
WindowsIdentity identity = new WindowsIdentity(userTokenDuplication);
_impersonationContext = identity.Impersonate();
}
//else
//{
// // Token duplication failed!
// // Use the default ctor overload
// // that will use Mashal.GetLastWin32Error();
// // to create the exceptions details.
// throw new Win32Exception();
//}
}
finally
{
// Close usertoken handle duplication when created.
if (!userTokenDuplication.Equals(IntPtr.Zero))
{
// Closes the handle of the user.
NativeMethod.CloseHandle(userTokenDuplication);
userTokenDuplication = IntPtr.Zero;
}
// Close usertoken handle when created.
if (!userToken.Equals(IntPtr.Zero))
{
// Closes the handle of the user.
NativeMethod.CloseHandle(userToken);
userToken = IntPtr.Zero;
}
}
}
//else
//{
// // Logon failed!
// // Use the default ctor overload that
// // will use Mashal.GetLastWin32Error();
// // to create the exceptions details.
// throw new Win32Exception();
//}
}
