UsersController::check_password PHP Method

    function check_password()
    {
        $pass = $this->data['password'];
        if (SES_ID) {
            $userinfo = $this->User->find('first', array('conditions' => array('User.id' => SES_ID)));
            if ($userinfo['User']['password']) {
                if ($userinfo['User']['password'] == md5($pass)) {
                    echo 1;
                    exit;
                } else {
                    echo "Wrong password entered.";
                    exit;
                }
            } else {
                if ($userinfo['User']['password'] == '' && $pass == '') {
                    echo 1;
                    exit;
                }
            }
        } else {
            echo "You are not allowed to do this activity";
            exit;
        }
    }