[lib.php] Decoded for: [email protected]

<?php
function check_license($licensekey, $localkey) {
    $chy = curl_init();
    curl_setopt($chy, CURLOPT_URL, "http://portal.syslint.com/modules/servers/licensing/wimip.php");
    curl_setopt($chy, CURLOPT_RETURNTRANSFER, 1);
    $ip = curl_exec($chy);
    $HIP = $ip;
    curl_close($chy);
    $whmcsurl = "http://portal.syslint.com/";
    $licensing_secret_key = "cs+PWxyjyprot4pc4xebwzkbf";
    $checkdate = date("Ymd");
    $usersip = $ip;
    $localkeydays = 7;
    $allowcheckfaildays = 2;
    $localkeyvalid = false;
    if ($localkey) {
        $localkey = str_replace("\n", "", $localkey);
        $localdata = substr();
        $md5hash = substr($localkey, strlen($localkey) - 32);
        if ($md5hash == md5($localdata . $licensing_secret_key)) {
            $localdata = strrev($localdata);
            $md5hash = substr($localdata, 0, 32);
            $localdata = substr($localdata, 32);
            $localdata = base64_decode($localdata);
            $localkeyresults = unserialize($localdata);
            $originalcheckdate = $localkeyresults['checkdate'];
            if ($md5hash == md5($originalcheckdate . $licensing_secret_key)) {
                $localexpiry = date("Ymd", mktime(0, 0, 0, date("m"), date("d") - $localkeydays, date("Y")));
                if ($localexpiry < $originalcheckdate) {
                    $localkeyvalid = true;
                    $results = $localkeyresults;
                    $validdomains = explode(",", $results['validdomain']);
                    if (!in_array($_SERVER['SERVER_NAME'], $validdomains)) {
                        $localkeyvalid = false;
                        $localkeyresults['status'] = "Invalid";
                        $results = array();
                    }
                    $validips = explode(",", $results['validip']);
                    if (!in_array($usersip, $validips)) {
                        $localkeyvalid = false;
                        $localkeyresults['status'] = "Invalid";
                        $results = array();
                    }
                    if ($results['validdirectory'] != dirname(__FILE__)) {
                        $localkeyvalid = false;
                        $localkeyresults['status'] = "Invalid";
                        $results = array();
                    }
                }
            }
        }
    }
    if (!$localkeyvalid) {
        if (isset($_SERVER['HOSTNAME'])) {
            $hostname = trim($_SERVER['HOSTNAME']);
        } else {
            $hostname = "localhost";
        }
        $postfields['licensekey'] = $licensekey;
        $postfields['domain'] = $hostname;
        $postfields['ip'] = $HIP;
        $postfields['dir'] = "/usr/local/directadmin/plugins/danginx";
        if (function_exists("curl_exec")) {
            $ch = curl_init();
            curl_setopt($ch, CURLOPT_URL, $whmcsurl . "modules/servers/licensing/verify.php");
            curl_setopt($ch, CURLOPT_POST, 1);
            curl_setopt($ch, CURLOPT_POSTFIELDS, $postfields);
            curl_setopt($ch, CURLOPT_TIMEOUT, 30);
            curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
            $data = curl_exec($ch);
            curl_close($ch);
        } else {
            $fp = fsockopen($whmcsurl, 80, $errno, $errstr, 5);
            if ($fp) {
                $querystring = "";
                foreach($postfields as $k => $v) {
                    $querystring.= "{$k}=" . urlencode($v) . "&";
                }
                $header = "POST " . $whmcsurl . "modules/servers/licensing/verify.php HTTP/1.0\r\n";
                $header.= "Host: " . $whmcsurl . "\r\n";
                $header.= "Content-type: application/x-www-form-urlencoded\r\n";
                $header.= "Content-length: " . @strlen(@$querystring) . "\r\n";
                $header.= "Connection: close\r\n\r\n";
                $header.= $querystring;
                $data = "";
                @stream_set_timeout(@$fp, 20);
                @fputs(@$fp, @$header);
                $status = @socket_get_status(@$fp);
                while (!feof(@$fp) && $status) {
                    $data.= @fgets(@$fp, 1024);
                    $status = @socket_get_status(@$fp);
                }
                @fclose(@$fp);
            }
        }
        if (!$data) {
            $localexpiry = date("Ymd", mktime(0, 0, 0, date("m"), date("d") - ($localkeydays + $allowcheckfaildays), date("Y")));
            if ($localexpiry < $originalcheckdate) {
                $results = $localkeyresults;
            } else {
                $results['status'] = "Remote Check Failed";
                return $results;
            }
        }
        preg_match_all("/<(.*?)>([^<]+)<\\/\\1>/i", $data, $matches);
        $results = array();
        foreach($matches[1] as $k => $v) {
            $results[$v] = $matches[2][$k];
        }
        if ($results['status'] == "Active") {
            $results['checkdate'] = $checkdate;
            $data_encoded = serialize($results);
            $data_encoded = base64_encode($data_encoded);
            $data_encoded = md5($checkdate . $licensing_secret_key) . $data_encoded;
            $data_encoded = strrev($data_encoded);
            $data_encoded = $data_encoded . md5($data_encoded . $licensing_secret_key);
            $data_encoded = wordwrap($data_encoded, 80, "\n", true);
            $results['localkey'] = $data_encoded;
        }
        $results['remotecheck'] = true;
    }
    unset($postfields);
    unset($data);
    unset($matches);
    unset($whmcsurl);
    unset($licensing_secret_key);
    unset($checkdate);
    unset($usersip);
    unset($localkeydays);
    unset($allowcheckfaildays);
    unset($md5hash);
    return $results;
}
?>