<?php

if ( !isset( $_GET['pid'] ) )
{
    die('Invalid request.');
}

if ( isset( $_GET['data'] ) )
{
    $result = "\x01\x00";
    die( $result.sha1("HZEdGCzcGGLvguqUEKQN".base64_url_encode($result)."HZEdGCzcGGLvguqUEKQN") );
}

$result = md5( uniqid() );
die( $result );

function base64_url_encode($input) {
    return strtr(base64_encode($input), '+/', '-_');
}
?>