public byte[] SerializeAndEncrypt(XXTea xxTea, ProtocolRes response)
{
try
{
using (MemoryStream ms = new MemoryStream())
{
Serializer.Serialize(ms, response);
return(xxTea.Encrypt(ms.ToArray()));
}
}
catch (Exception ex)
{
return(null);
}
}
public async Task Invoke(HttpContext context)
{
ProtocolId protocolId = ProtocolId.None;
try
{
var httpRequest = context.Request;
var httpResponse = context.Response;
XXTea xxtea = null;
ProtocolReq req = null;
byte encrypted;
uint hash;
int length = (int)httpRequest.ContentLength;
byte[] inBuffer = new byte[length];
using (var inStream = httpRequest.Body)
using (var stream = new MemoryStream(inBuffer))
using (var reader = new BinaryReader(stream))
{
await inStream.CopyToAsync(stream);
stream.Position = 0;
encrypted = reader.ReadByte();
hash = reader.ReadUInt32();
if (encrypted == 2)
{
xxtea = new XXTea(new uint[] { hash ^ ServerConfig.Key1, hash ^ ServerConfig.Key2, hash ^ ServerConfig.Key3, hash ^ ServerConfig.Key4 });
}
else if (encrypted == 1)
{
xxtea = new XXTea(new uint[] { ServerConfig.Key1, ServerConfig.Key2, ServerConfig.Key3, ServerConfig.Key4 });
req = DecryptAndDeserialize(xxtea, inBuffer, 5, length - 5);
protocolId = req.Protocol.ProtocolId;
if (protocolId == ProtocolId.Auth)
{
}
else
{
throw new Exception("encrypted == 1 is allowed to only Protocol Auth");
}
}
else if (encrypted == 0)
{
req = Serializer.Deserialize <ProtocolReq>(stream);
protocolId = req.Protocol.ProtocolId;
if (protocolId == ProtocolId.HandShake)
{
}
else
{
throw new Exception("encrypted == 0 is allowed to Protocol HandShake");
}
}
else
{
throw new Exception("Encrypted : Unavaiable Value");
}
}
byte[] data = null;
ProtocolRes response = await Service.ProcessAsync(context, req.Suid, hash, req.Protocol);
if (response.ProtocolId == ProtocolId.Error)
{
encrypted = 0;
xxtea = null;
}
using (var stream = new MemoryStream())
using (var writer = new BinaryWriter(stream))
{
writer.Write(encrypted);
if (xxtea != null)
{
writer.Write(SerializeAndEncrypt(xxtea, response));
}
else
{
Serializer.Serialize(stream, response);
}
data = stream.ToArray();
httpResponse.ContentLength = data.Length;
using (Stream outStream = httpResponse.Body)
{
await outStream.WriteAsync(data, 0, data.Length);
}
}
}
catch (Exception ex)
{
}
}
