8
●511
<?php
class r10_lisans_server
{
Private $ROOT_PATH;
Private $LICENSE_KEY;
public function __construct($fonksiyon)
{
header("Content-Type: text/html; charset=utf-8");
$this->ROOT_PATH = dirname(__FILE__);
$this->LICENSE_KEY = "Nv15NrhFb98H4pVeGiv9ENB8o2aFQ0Zu";
switch ($fonksiyon) {
case "ilk_function":
$this->ilk_function();
break;
}
}
public function encrypt($code)
{
$key = substr(hash('sha256', $this->LICENSE_KEY . $this->LICENSE_KEY), 0, 32);
$algorithm = MCRYPT_RIJNDAEL_128;
$mode = MCRYPT_MODE_CBC;
$ivSize = mcrypt_get_iv_size($algorithm, $mode);
$iv = mcrypt_create_iv($ivSize, MCRYPT_DEV_URANDOM);
$ciphertext = $iv . mcrypt_encrypt($algorithm, $this->LICENSE_KEY, $code, $mode, $iv);
$hmac = hash_hmac('sha256', $ciphertext, $this->LICENSE_KEY);
return $hmac . $ciphertext;
}
public function ilk_function()
{
$code = "";
$code .= "[BASLA]\n";
$code .= "function ilk_function() { echo 'selam'; }";
$code .= "[BITIR]\n";
echo $this->encrypt($code);
}
}
class r10_lisans_client
{
public function __construct($LICENSE_KEY)
{
header("Content-Type: text/html; charset=utf-8");
$this->LICENSE_KEY = $LICENSE_KEY;
}
public function decrypt($cipher)
{
$key = substr(hash('sha256', $this->LICENSE_KEY . $this->LICENSE_KEY), 0, 32);
$macSize = 64;
$hmac = substr($cipher, 0, $macSize);
$cipher = substr($cipher, $macSize);
$compareHmac = hash_hmac('sha256', $cipher, $this->LICENSE_KEY);
if ($hmac !== $compareHmac) {
return FALSE;
}
$algorithm = MCRYPT_RIJNDAEL_128;
$mode = MCRYPT_MODE_CBC;
$ivSize = mcrypt_get_iv_size($algorithm, $mode);
$iv = substr($cipher, 0, $ivSize);
$cipher = substr($cipher, $ivSize);
$plain = mcrypt_decrypt($algorithm, $this->LICENSE_KEY, $cipher, $mode, $iv);
return rtrim($plain, "\0");
}
public function ilk_function()
{
$code = php_duzelt(file_get_contents("https://site.com/fonksiyonlar.php?fonksiyon=ilk_function"));
echo $this->decrypt($code);
}
public function php_duzelt($code)
{
return str_replace(array("[BASLA]", "[BITIR]"), array("<?php", "?>"), $code);
}
}
$server = new r10_lisans_server($_GET["fonksiyon"]);
$client = new r10_lisans_client("LISANS ANAHTARI"); 
) ), HTTP header göndermek, uzak sunucudaki web sunucusunun HTTP headerini yorumlaması, gelen method a ve isteğe göre response hazırlaması ve çıktılaması, çıktılanan veriyi localdeki socketin okuması ve socketin kapatılması.