diff --git a/conf/site/vendor/laravel/framework/src/Illuminate/Cookie/CookieValuePrefix.php b/conf/site/vendor/laravel/framework/src/Illuminate/Cookie/CookieValuePrefix.php
new file mode 100644
index 00000000..e39cb69f
--- /dev/null
+++ b/conf/site/vendor/laravel/framework/src/Illuminate/Cookie/CookieValuePrefix.php
@@ -0,0 +1,29 @@
+<?php
+
+namespace Illuminate\Cookie;
+
+class CookieValuePrefix
+{
+    /**
+     * Create a new cookie value prefix for the given cookie name.
+     *
+     * @param  string  $cookieName
+     * @param  string  $key
+     * @return string
+     */
+    public static function create($cookieName, $key)
+    {
+        return hash_hmac('sha1', $cookieName.'v2', $key).'|';
+    }
+
+    /**
+     * Remove the cookie value prefix.
+     *
+     * @param  string  $cookieValue
+     * @return string
+     */
+    public static function remove($cookieValue)
+    {
+        return substr($cookieValue, 41);
+    }
+}