<?php

    function user_not_valid()
    {
        die ('0');
    }

    function user_valid()
    {
        die ('1');
    }

    include 'connect_to_mysql.php';

    //GET_['a'] == login
    //GET_['b'] == md5 hash of password
    //GET_['c'] == md5 hash of hardware id
    //GET_['d'] == md5 hash (login+passwordMD5+hwidMD5+'check_user');
    if(isset($GET_['a']) && isset($GET_['b']) && isset($GET_['c']) && isset($GET_['d']))
    {
        $username = $GET_['a'];
        $password_hash = $GET_['b'];
        $hardwareID_hash = $GET_['c'];
        $request_hash = $GET_['d'];
        $username_length = strlen($username);

        if(strlen($password_hash) != 32 || strlen($hardwareID_hash) != 32 || strlen($request_hash) != 32)
            user_not_valid();

        if($username_length < 1 || $username_length > 32)
            user_not_valid();
    }else{
        user_not_valid();
    }
?>