001/* 002 * Trident - A Multithreaded Server Alternative 003 * Copyright 2014 The TridentSDK Team 004 * 005 * Licensed under the Apache License, Version 2.0 (the "License"); 006 * you may not use this file except in compliance with the License. 007 * You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017 018package net.tridentsdk.server.netty.packet; 019 020import io.netty.buffer.ByteBuf; 021import io.netty.channel.ChannelHandlerContext; 022import io.netty.handler.codec.MessageToByteEncoder; 023import net.tridentsdk.server.netty.ClientConnection; 024 025/** 026 * An encoder that encrypts the information contained in the raw packet 027 * 028 * <p>This is first stage in the outbound packet pipeline</p> 029 * 030 * @author The TridentSDK Team 031 */ 032public class PacketEncrypter extends MessageToByteEncoder<ByteBuf> { 033 private ClientConnection connection; 034 035 @Override 036 public void handlerAdded(ChannelHandlerContext context) { 037 this.connection = ClientConnection.connection(context); 038 } 039 040 /* (non-Javadoc) 041 * @see io.netty.handler.codec.MessageToByteEncoder#encode(io.netty.channel.ChannelHandlerContext, 042 * java.lang.Object, io.netty.buffer.ByteBuf) 043 */ 044 @Override 045 protected void encode(ChannelHandlerContext ctx, ByteBuf msg, ByteBuf out) throws Exception { 046 if (this.connection.isEncryptionEnabled()) { 047 out.writeBytes(this.connection.encrypt(msg)); 048 } else { 049 out.writeBytes(msg); 050 } 051 } 052}