| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE |
| * file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file |
| * to You under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the |
| * License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on |
| * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations under the License. |
| */ |
| package org.apache.tuweni.scuttlebutt.handshake; |
| |
| import org.apache.tuweni.bytes.Bytes; |
| |
| /** |
| * Interface used to encrypt and decrypt messages to and from a client. |
| */ |
| public interface SecureScuttlebuttStreamServer { |
| |
| /** |
| * Checks if a message is a goodbye message, indicating the end of the connection |
| * |
| * @param message the message to interpret |
| * |
| * @return true if the message is a goodbye message, or false otherwise |
| */ |
| static boolean isGoodbye(Bytes message) { |
| return message.size() == 18 && message.numberOfLeadingZeroBytes() == 18; |
| } |
| |
| /** |
| * Prepares a message to be sent to the client |
| * |
| * @param message the message to encrypt and format |
| * @return the message, encrypted and ready to send |
| */ |
| Bytes sendToClient(Bytes message); |
| |
| /** |
| * Prepares a goodbye message to be sent to the client |
| * |
| * @return the goodbye message |
| */ |
| Bytes sendGoodbyeToClient(); |
| |
| /** |
| * Adds message bytes to the reader stream, returning the bytes that could be decrypted. |
| * |
| * @param message the message to decrypt |
| * @return the message, decrypted and ready for consumption, or null if the bytes provided were an incomplete message. |
| * @throws StreamException if the message cannot be decrypted |
| */ |
| Bytes readFromClient(Bytes message); |
| } |