Socket安全

Socket安全

之前我们用的Socket是包的长度加包体内容

 

    /// <summary>

    /// 封装数据包

    /// </summary>

    /// <param name="data"></param>

    /// <returns></returns>

    private byte[] MakeData(byte[] data)

    {

        byte[] retBuffer = null;

        using (MMO_MemoryStream ms = new MMO_MemoryStream())

        {

            ms.WriteUShort((ushort)data.Length);

            ms.Write(data, 0, data.Length);

            retBuffer = ms.ToArray();

        }

        return retBuffer;

    }

然后，我们对数据进行安全加密，这里就需要我们从新处理一下我们这个数据包了，因为传输的数据要具有一定的安全性，所以就要对其内容多加一下处理，

1还是要标明咱们的包的总长度

2这里我们做一个压缩的处理，游戏数据太大我们就需要进行压缩处理

3CRC16效验，这是用来判断我们收到的数据是否具有完整性，还有是否被修改过

4然后在用Xor异或对内容再次进行加密

5异或之后的数据就是咱们真正需要的数据

 

具体代码如下

这里是封装数据包

 private byte[] MakeData(byte[] data)

    {

        byte[] retBuffer = null;

        //1,如果数据包的长度大于m_CompressLen   则进行压缩

        bool isCompress = data.Length > m_CompressLen ? true : false;

        if (isCompress)

        {

            byte[] compressBuffer = ZlibHelper.CompressBytes(data);

        }

        //2先异或

        data = SecurityUtil.Xor(data);

        //3Crc效验

        ushort crc = Crc16.CalculateCrc16(data);

        using (MMO_MemoryStream ms = new MMO_MemoryStream())

        {

            ms.WriteUShort((ushort)(data.Length + 3));

            ms.WriteBool(isCompress);

            ms.WriteUShort(crc);

            ms.Write(data, 0, data.Length);

            retBuffer = ms.ToArray();

        }

        return retBuffer;

    }

然后咱们需要把这些数据进行解析

 using (MMO_MemoryStream ms = new MMO_MemoryStream(buffer))

                        {

                         //判断是否压缩

                            isCompress = ms.ReadBool();

                          //crc

                            crc = ms.ReadUShort();

                            ms.Read(bufferNew, 0, bufferNew.Length);

                        }

                        int newCrc = Crc16.CalculateCrc16(bufferNew);

                        if (newCrc == crc)

                        {

                            //异或  得到原始数据

                            bufferNew=SecurityUtil.Xor(buffer);

                            if (isCompress)

                            {

                                bufferNew =ZlibHelper.DeCompressBytes(bufferNew);

                            }

                            ushort protoCode = 0;

                            byte[] protoContent = null;

                            using (MMO_MemoryStream ms = new MMO_MemoryStream(buffer))

                            {

                                //协议编号

                                 protoCode = ms.ReadUShort();

                                 ms.Read(protoContent, 0, protoContent.Length);

                                 EventDispatcher.Instance.Dispatch(protoCode, protoContent);

                            }

                        }

                        else

                        {

                            break;

                        }

以上是客户端的代码，服务端的代码和客户端的是一样的，这里我就不写了