User Management Code

  Home arrow User Management Code arrow User Authentication from NT Accounts

User Authentication from NT Accounts
By: Codewalkers
  • Search For More Articles!
  • Disclaimer
  • Author Terms
  • Rating: 5 stars5 stars5 stars5 stars5 stars / 3

    Table of Contents:



    This little chunk exploits the win32api extensions. Allows you to validate a user on a NT domain.

    By : geekmug


    //Copyright 2002 Scott Dial
    //This code is free to modify, use, abuse, or whatever you like. It'd be interesting though to hear what you are using it for, so shoot me an email if you use this snippet.

    //These values are pulled straight from winbase.h from the platform sdk

    define("LOGON32_LOGON_INTERACTIVE", 2);
    define("LOGON32_LOGON_NETWORK", 3);
    define("LOGON32_LOGON_BATCH", 4);
    define("LOGON32_LOGON_SERVICE", 5);

    define("LOGON32_PROVIDER_DEFAULT", 0);
    define("LOGON32_PROVIDER_WINNT35", 1);
    define("LOGON32_PROVIDER_WINNT40", 2);
    define("LOGON32_PROVIDER_WINNT50", 3);

    //These aren't actually in winbase.h but are accurate
    define("LOGON32_DOMAIN_LOCAL", ".");
    define("LOGON32_DOMAIN_ALL", 0);

    if(!extension_loaded('win32api')) {
    if (!dl('win32api')) {
    die("Couldn't load win32api!");

    function NT_Validate_User($user, $domain, $pass)
    w32api_register_function("kernel32.dll", "LocalAlloc", "long");
    w32api_register_function("kernel32.dll", "LocalFree", "long");
    w32api_register_function("kernel32.dll", "CloseHandle", "bool");
    w32api_register_function("advapi32.dll", "LogonUserA", "bool");

    $cleanup = w32api_register_function("deref.dll", "deref", "long");

    $pHandle = LocalAlloc(0, 4); //Pointer to a HANDLE

    $test = LogonUserA($user,

    if($test != 0)
    $handle = deref($pHandle);
    return 1;
    } else {
    return 0;


    deref.dll is the following C:
    __declspec(dllexport) void *deref(void **a)
    return *a;
    DISCLAIMER: The content provided in this article is not warranted or guaranteed by Developer Shed, Inc. The content provided is intended for entertainment and/or educational purposes in order to introduce to the reader key ideas, concepts, and/or product reviews. As such it is incumbent upon the reader to employ real-world tactics for security and implementation of best practices. We are not liable for any negative consequences that may result from implementing any information covered in our articles or tutorials. If this is a hardware review, it is not recommended to open and/or modify your hardware.

    More User Management Code Articles
    More By Codewalkers

    blog comments powered by Disqus


    - XCRYPT v1.0b
    - DB_eSession class stores sessions in a MySQL...
    - Ever Changing Dynamic Passcode Code
    - phpAutoMembersArea - create own members area
    - Azura Signup 2.5
    - Azura Signup 2.0
    - Azura Signup
    - Flexcustomer
    - PHP Quicksite 2.0
    - PHP Quicksite 1.0
    - random string generator (key generator)
    - Example Login system
    - Simple and Easy Security
    - Basic Security
    - UMA - User Management and Authentication

    Developer Shed Affiliates


    © 2003-2019 by Developer Shed. All rights reserved. DS Cluster - Follow our Sitemap