create_check_auth_request (OpenID::Consumer::IdResHandler)

    # File lib/openid/consumer/idres.rb, line 241
          def create_check_auth_request
            check_args = {}

            # Arguments that are always passed to the server and not
            # included in the signature.
            for k in ['assoc_handle', 'sig', 'signed', 'invalidate_handle']
              val = fetch(k, nil)
              if !val.nil?
                check_args[k] = val
              end
            end

            for k in signed_list
              val = @message.get_aliased_arg(k, NO_DEFAULT)
              check_args[k] = val
            end

            check_args['mode'] = 'check_authentication'
            return Message.from_openid_args(check_args)
          end