<?php
$copywrite = file_get_contents("copywrite.rar");
$qqwry = file_get_contents("qqwry.rar");
$key = unpack("V6", $copywrite)[6];
for ($i = 0; $i < 512; $i++) {
    $key = (($key * 2053) + 1) & 0xFF;
    $qqwry[$i] = chr(ord($qqwry[$i]) ^ $key);
}
$qqwry = gzuncompress($qqwry);
$fp = fopen("qqwry.dat", "wb");
fwrite($fp, $qqwry);
fclose($fp);
?>