[TLS] TLS@IETF104: Agenda Topics

2019-02-07 Thread Sean Turner
The TLS WG will be meeting @ IETF 104 in Prague. To help the chairs get a better handle on how much time we will need for our session, please send in your agenda requests to tls-cha...@ietf.org. Along with your request please provide an estimate for how much time you will need. Cheers, Chris

[TLS] Server validation of a second ClientHello

2019-02-07 Thread Martin Thomson
TLS 1.3 is pretty firm about what you can change in a second ClientHello. It lists a small set of allowed changes to extensions (cookie, PSK binder, key shares, early data, and padding). For the rest it says that nothing can change. So clearly a client is in the wrong if it changes, adds, or