Restrict Dradis Pro signups with HTTP Basic authentication

users_controller.rb

require 'digest/sha2'
class UsersController < ApplicationController
  before_filter :login_required, :except => [:new, :create]
  before_filter :basicauth, :only => [:new, :create]
  
protected
  def basicauth
    if authenticate_with_http_basic { |user, password| !( user.nil? || password.nil? || ::Digest::SHA512.hexdigest(password) != Configuration.password ) }
      Rails.logger.debug 'foo'
    else
      request_http_basic_authentication('Dradis Pro')
    end
  end
  
public
  def new
    @user = User.new
  end
# [...]
end