On Tue, Jul 23, 2019 at 3:09 PM Chris Inacio <ina...@cert.org> wrote: > I really want the savings on the wire that TLS flags extension provides – and > so I think it’s really good for the future cTLS but I’m not sure when I get > to use it in TLS 1.3 negotiation. It goes in the clientHello message, but > how will I know that the server uses this extension? I envision a future > where we will add the flags extension along with the more expensive 4-bytes > version for a REALLY long time.
The expectation is that applicable future extensions will be defined as flags. Therefore, if the server supports the extension that you're interested in then it'll also have to support the flags extension. If it doesn't, then the extension will be ignored as normal. Cheers AGL _______________________________________________ TLS mailing list TLS@ietf.org https://www.ietf.org/mailman/listinfo/tls
