protected override void Encode(IChannelHandlerContext context, IObject message, IByteBuffer output)
{
if (message == null)
{
return;
}
var messageId = ClientSettings.ClientSession.GenerateMessageId();
var isRequest = message is IRequest;
var sequenceNumber = ClientSettings.ClientSession.GenerateSequenceNumber(isRequest);
SessionWriter.Save(ClientSettings.ClientSession);
var messageBuffer = Serializer.Serialize(message);
try
{
MtProtoHelper.ToServerEncrypt(messageBuffer, ClientSettings.ClientSession, messageId, sequenceNumber, output);
}
finally
{
messageBuffer.Release();
}
Log.Debug($"#{ClientSettings.ClientSession.SessionId}: Send secure message {message} with messageId = {messageId} and sequenceNumber = {sequenceNumber}");
if (isRequest)
{
RequestService.AttachRequestToMessageId(message.Is <IRequest>(), messageId);
}
}
protected override void Decode(IChannelHandlerContext context, IByteBuffer input, List <object> output)
{
if (input is EmptyByteBuffer)
{
return;
}
if (ClientSettings.ClientSession.AuthKey == null)
{
throw new UserNotAuthorizeException();
}
var decodeBuffer = MtProtoHelper.FromServerDecrypt(input, ClientSettings.ClientSession, out var authKeyId, out var serverSalt, out var sessionId, out var messageId, out var seqNumber);
try
{
var message = Serializer.Deserialize(decodeBuffer);
Log.Debug($"#{ClientSettings.ClientSession.SessionId}: Receive the secure message {message}");
output.Add(message);
}
catch
{
decodeBuffer.ResetReaderIndex();
Log.Error($"#{ClientSettings.ClientSession.SessionId}: Can't deserialize message: \n{ByteBufferUtil.PrettyHexDump(decodeBuffer)}");
throw;
}
}
public void ToServerEncryption()
{
var user = new TUser
{
AccessHash = 11111,
Id = 1
};
var input = Serializer.Serialize(user);
var output = PooledByteBufferAllocator.Default.Buffer();
MtProtoHelper.ToServerEncrypt(input, _session, 0, SeqNumber, output);
var dencryptedData = MtProtoHelper.FromClientDecrypt(output, _session, out var authKeyId,
out var serverSalt, out var sessionId, out var messageId, out var seqNumber);
input.ResetReaderIndex();
Assert.Equal(input.ToArray(input.ReadableBytes), dencryptedData.ToArray(dencryptedData.ReadableBytes));
Assert.Equal(_session.AuthKey.Id, authKeyId);
Assert.Equal(_session.ServerSalt, serverSalt);
Assert.Equal(_session.SessionId, sessionId);
Assert.Equal(_seqNumber - 1, seqNumber);
}