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Lineage 2 dat files decoder. Author: Hint aka Ilya
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| <?php | |
| /** | |
| * L2 file decoder (4 october 2011). | |
| * @author Hint aka Ilya | |
| */ | |
| function decode($filename, $original = true) | |
| { | |
| $file = @file_get_contents($filename); | |
| if (!$file) return false; | |
| if (strlen($file) < 28 + 128) return false; | |
| $head = mb_convert_encoding(substr($file, 0, 28), 'UTF-8', 'UTF-16LE'); | |
| if ($head != 'Lineage2Ver413') return false; | |
| $blocks = intval((strlen($file) - 28) / 128); | |
| if ($blocks < 1) return false; | |
| $size = $blocks * 128; | |
| $file = substr($file, 28, $size); | |
| if ($original) | |
| { | |
| $s = base64_decode('l985hHLd9zfvCgzRfo0XLw/vFmGjiorh1ugpvBxuTDz8GSkt2p75AXXkbnOUoYhQtkF9A75u6idNPtHd5bXXvecswKC3HQNghlVjOIF5OgLJpn2e8rRet8CNS+MpCDzkUOaPeGe2dJMU1AUR0JvFdEVRuqhqidw4Ej3BZo/XLYM='); | |
| $key = gmp_init('0x' . bin2hex($s)); | |
| $exp = gmp_init('0x35'); | |
| } | |
| else | |
| { | |
| $s = base64_decode('dbTW3lwBZUQGihrPElhp9D0uCfxVuLHiiVVtr5uHV2NVk0RiiLNlPaHOkch7saXBjxYyNJXFXX1ywIkKg/ab/R/ZQ06xwC8+Rnnt+kMwkxkHASnCZ8hWBNh7tluuIF3jcHrx0hCIgau1Z8Oz0GmuZ8OkxqOqk9JkE9TGYJSuIDk='); | |
| $key = gmp_init('0x' . bin2hex($s)); | |
| $exp = gmp_init('0x1d'); | |
| } | |
| $data = ''; | |
| for ($i = 0; $i < $blocks; ++$i) | |
| { | |
| $block = substr($file, $i * 128, 128); | |
| $res = gmp_powm('0x' . bin2hex($block), $exp, $key); | |
| if (!is_resource($res)) return false; | |
| $hex = gmp_strval($res, 16); | |
| if (strlen($hex) != 250) return false; | |
| $s = pack('H*' , $hex); | |
| $size = ord($s[0]); | |
| if ($size > strlen($s) - 1) return false; | |
| if ($size != 0x7c) | |
| { | |
| $p = strlen($s) - $size; | |
| while ($p > 2 && $s[$p - 1] != "\0") --$p; | |
| $s = substr($s, $p, $size); | |
| } | |
| else | |
| { | |
| $s = substr($s, -$size); | |
| } | |
| $data .= $s; | |
| } | |
| $a = unpack('L', $data); | |
| if (!is_array($a) || !isset($a[1])) return false; | |
| $size = intval($a[1]); | |
| $data = substr($data, 4); | |
| $result = gzuncompress($data); | |
| if (strlen($result) != $size) return false; | |
| return $result; | |
| } | |
| // $s = decode('/Users/Stmol/Downloads/armorgrp.dat', true); | |
| // if ($s === false) die('Error!'); | |
| // file_put_contents('dec-l2.ini', $s); |
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