What is the different in the Noise protocol used by WhatsApp?

[ben221199]

When I create a client that implements the Noise protocol with Noise_XX_25519_AESGCM_SHA256 using https://github.com/rweather/noise-java, connect to the WhatsApp server and send a ClientHello, I receive a ServerHello. After that, when I send a ClientFinish, the server doesn't respond back anymore. Also, I needed to alter https://github.com/rweather/noise-java, because the MAC failed, see rweather/noise-java#1. When I implement my own server, after the handshake, I can send and receive messages from both sides, but then I also need to alter https://github.com/rweather/noise-java on the same places. That altering isn't the most important part, because it is only verifying if the MAC is correct, but the real problem is that I don't receive any response from the WhatsApp server after the ClientFinish.

[ben221199]

There is no difference. The protcol is the same. The issue rweather/noise-java#1 is solved. It was the missing prologue.