jwt helper

src/Auth/Business/JwtHelper.php

@@ -0,0 +1,50 @@
+<?php
+/**
+ * Created by PhpStorm.
+ * User: robin
+ * Date: 9/27/15
+ * Time: 1:51 AM
+ */
+
+namespace Luticate\Auth\Business;
+
+class JwtHelper
+{
+    const EXPIRATION_KEY =  "expiration_date";
+    const USER_KEY =        "user_id";
+
+    public static function decode($token)
+    {
+        $jwt = mcrypt_decrypt(MCRYPT_TRIPLEDES, env("MCRYPT_KEY"), base64_decode($token), "ecb");
+        try
+        {
+            $data = (array)\JWT::decode($jwt, env("JWT_KEY"), ['HS256']);
+        }
+        catch (\Exception $e)
+        {
+            return null;
+        }
+
+        $expiration_date = array_key_exists(self::EXPIRATION_KEY, $data) ? $data[self::EXPIRATION_KEY] : null;
+        if (!is_numeric($expiration_date))
+            return null;
+        $user_id = array_key_exists(self::USER_KEY, $data) ? $data[self::USER_KEY] : null;
+        if (!is_numeric($user_id))
+            return null;
+
+        if ($expiration_date < time())
+            return null;
+
+        return $data;
+    }
+
+    public static function encode($data)
+    {
+        $date = new \DateTime("now", new \DateTimeZone("Europe/Paris"));
+        $date->modify("+30 day");
+        $date->setTime(0, 0, 0);
+        $data[self::EXPIRATION_KEY] = $date->getTimestamp();
+
+        return base64_encode(mcrypt_encrypt(MCRYPT_TRIPLEDES, env("MCRYPT_KEY"), \JWT::encode($data, env("JWT_KEY")), "ecb"));
+    }
+}