VotifierV2 PHP Implementation

gistfile1.php

<?php

class VotifierV2 {

        private $service;
        private $privateKey;

        public function __construct($service, $privateKey) {
                $this->service = $service;
                $this->privateKey = $privateKey;
        }

        public function vote($host, $port, $timeout, $username, $address) {
                if(!$socket = @fsockopen($host, $port, $errno, $errstr, $timeout)) {
                        return FALSE;
                }
                if(!stream_set_timeout($socket, $timeout)) {
                        fclose($socket);
                        return FALSE;
                }
                $version = trim(fgets($socket));
                if(!$version) {
                        fclose($socket);
                        return FALSE; // Timeout
                }
                $versionExploded = explode(" ", $version);
                if(sizeof($versionExploded) < 3) {
                        fclose($socket);
                        return FALSE; // Version / Not sending a challenge
                }
                if($versionExploded[0] != "VOTIFIER") {
                        fclose($socket);
                        return FALSE; // Version
                }
                if($versionExploded[1] < 2) {
                        fclose($socket);
                        return FALSE; // Version
                }
                fputs($socket, $this->jsonMessage($host, $username, $address, $versionExploded[2]));
                fclose($socket);
                return TRUE;
        }

        private function jsonMessage($host, $username, $address, $challenge) {
                $payload = json_encode(array("host" => $host, "username" => $username, "address" => $address, "challenge" => $challenge, "timestamp" => time()));
                openssl_sign($payload, $signature, $this->privateKey, "sha256WithRSAEncryption");
                return json_encode(array("service" => $this->service, "signature" => base64_encode($signature), "payload" => $payload));
        }

}


include "private.config.php";

$votifier = new VotifierV2("test", $config["privateKey"]);
if(!$votifier->vote("127.0.0.1", 8192, 10, "mytestuser", "123.123.123.123")) {
        echo "Error voting\r\n";
} else {
        echo "Success voting\r\n";
}