c# - 偽装を使用する場合の c# のユーザー名またはパスワードの誤り

Question

私がやろうとしているのは、ドメインアクセスにないマシンが、ドメイン資格情報を偽装してレジストリチェックツールを実行できるようにすることです....ドメイン上のどのマシンでも問題なく動作しますが、ドメイン外の誰かが間違ったユーザー名を取得し、ドメイン管理者アカウントを使用している場合でも、パスワード エラーが発生します。同じ資格情報、1 台のマシンだけがドメイン上にあり、もう 1 台はそうではありません。これが偽装を呼び出す私のコードです...（その下の偽装コード）

private void button1_Click(object sender, EventArgs e)
    {
         //Variables for Authentication
        string userName;
        userName = txtUser.Text;
        string password;
        password = txtPass.Text;
        string domain;
        domain = txtDomain.Text;

        //Start Authentication
        using ( new Impersonator( userName, domain, password ) )
        {
        //Clears last run result
        txtResult.Clear();
        //Begin Error Handling
        try
        {
            //Variable for remote machine field
            string remotemachine;
            remotemachine = txtComputer.Text;
            // hourglass cursor
            Cursor.Current = Cursors.WaitCursor;

            //Begin Code to check Registry
            RegistryKey hive = RegistryKey.OpenRemoteBaseKey(RegistryHive.LocalMachine, remotemachine, RegistryView.Registry64);
            var key = hive.OpenSubKey(@"SOFTWARE\Microsoft\Windows\CurrentVersion\Authentication\LogonUI");
            if (key == null)
            {
            }
            object oVal = key.GetValue("LastLoggedOnUser"); if (null != oVal)
            {
            txtResult.Text = oVal.ToString();
            //End Registry Check
            //Return Cursor
            Cursor.Current = Cursors.Default;

            }
        }
        catch (System.IO.IOException)
        {
            MessageBox.Show("You entered an invalid PC or the firewall is blocking you (Remote Registry Service must be running on remote host and the following ports must be open: TCP 445)", "Error", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
        }
        catch (System.NullReferenceException)
        {
            MessageBox.Show("This is not a Windows 7 Device", "Error", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
        }
        catch (System.UnauthorizedAccessException)
        {
            MessageBox.Show("Unauthorized Access, run app as Domain Admin or Machine is not on your Domain", "Error", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
        }
        catch (System.Security.SecurityException)
        {
            MessageBox.Show("Unauthorized Access, run app as Domain Admin or Machine is not on your Domain", "Error", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
        }
        catch (System.Exception excep)
        {
            MessageBox.Show(excep.GetType().ToString());
        }
        }

これが偽装ファイルです..

namespace Tools

{

using System;
using System.Security.Principal;
using System.Runtime.InteropServices;
using System.ComponentModel;


public class Impersonator :
    IDisposable
{
    #region Public methods.
    // ------------------------------------------------------------------


    public Impersonator(
        string userName,
        string domainName,
        string password )
    {
        ImpersonateValidUser( userName, domainName, password );
    }

    // ------------------------------------------------------------------
    #endregion

    #region IDisposable member.
    // ------------------------------------------------------------------

    public void Dispose()
    {
        UndoImpersonation();
    }

    // ------------------------------------------------------------------
    #endregion

    #region P/Invoke.
    // ------------------------------------------------------------------

    [DllImport("advapi32.dll", SetLastError=true)]
    private static extern int LogonUser(
        string lpszUserName,
        string lpszDomain,
        string lpszPassword,
        int dwLogonType,
        int dwLogonProvider,
        ref IntPtr phToken);

    [DllImport("advapi32.dll", CharSet=CharSet.Auto, SetLastError=true)]
    private static extern int DuplicateToken(
        IntPtr hToken,
        int impersonationLevel,
        ref IntPtr hNewToken);

    [DllImport("advapi32.dll", CharSet=CharSet.Auto, SetLastError=true)]
    private static extern bool RevertToSelf();

    [DllImport("kernel32.dll", CharSet=CharSet.Auto)]
    private static extern  bool CloseHandle(
        IntPtr handle);

    private const int LOGON32_LOGON_INTERACTIVE = 2;
    private const int LOGON32_PROVIDER_DEFAULT = 0;

    // ------------------------------------------------------------------
    #endregion

    #region Private member.
    // ------------------------------------------------------------------

    /// <summary>
    /// Does the actual impersonation.
    /// </summary>
    /// <param name="userName">The name of the user to act as.</param>
    /// <param name="domainName">The domain name of the user to act as.</param>
    /// <param name="password">The password of the user to act as.</param>
    private void ImpersonateValidUser(
        string userName, 
        string domain, 
        string password )
    {
        WindowsIdentity tempWindowsIdentity = null;
        IntPtr token = IntPtr.Zero;
        IntPtr tokenDuplicate = IntPtr.Zero;

        try
        {
            if ( RevertToSelf() )
            {
                if ( LogonUser(
                    userName, 
                    domain, 
                    password, 
                    LOGON32_LOGON_INTERACTIVE,
                    LOGON32_PROVIDER_DEFAULT, 
                    ref token ) != 0 )
                {
                    if ( DuplicateToken( token, 2, ref tokenDuplicate ) != 0 )
                    {
                        tempWindowsIdentity = new WindowsIdentity( tokenDuplicate );
                        impersonationContext = tempWindowsIdentity.Impersonate();
                    }
                    else
                    {
                        throw new Win32Exception( Marshal.GetLastWin32Error() );
                    }
                }
                else
                {
                    throw new Win32Exception( Marshal.GetLastWin32Error() );
                }
            }
            else
            {
                throw new Win32Exception( Marshal.GetLastWin32Error() );
            }
        }
        finally
        {
            if ( token!= IntPtr.Zero )
            {
                CloseHandle( token );
            }
            if ( tokenDuplicate!=IntPtr.Zero )
            {
                CloseHandle( tokenDuplicate );
            }
        }
    }

    /// <summary>
    /// Reverts the impersonation.
    /// </summary>
    private void UndoImpersonation()
    {
        if ( impersonationContext!=null )
        {
            impersonationContext.Undo();
        }   
    }

    private WindowsImpersonationContext impersonationContext = null;