# File lib/net/ssh/userauth/methods/hostbased.rb, line 95
          def build_request( identity, next_service, username, hostname,
               client_username )
          # begin
            buf = @buffers.writer
            buf.write_byte USERAUTH_REQUEST
            buf.write_string username
            buf.write_string next_service
            buf.write_string "hostbased"

            buf.write_string identity.ssh_type
            blob = @buffers.writer
            blob.write_key identity
            buf.write_string blob.to_s

            buf.write_string hostname
            buf.write_string client_username
            return buf.to_s
          end