/**
  * Returns the contents of storage
  *
  * Behavior is undefined when storage is empty.
  *
  * @throws Zend_Auth_Storage_Exception If reading contents from
  *                                     storage is impossible
  * @return mixed
  */
 public function read()
 {
     $value = $this->app->getEncryptedCookie($this->cookieName);
     return json_decode($value, true);
 }