Am 03.02.22 um 17:46 schrieb Sean Turner:
On Feb 2, 2022, at 21:08, Christopher Wood<c...@heapingbits.net>  wrote:

Hi Jens,

On Jan 28, 2022, at 9:14 AM, Jens Guballa<j...@guballa.de>  wrote:

Am 27.01.22 um 17:35 schrieb Christopher Wood:
In preparing to move draft-ietf-tls-flags and 
draft-ietf-tls-cross-sni-resumption forward in the process, I’m curious if 
anyone is aware of implementations of either specification. If you know of an 
implementation, can you please share it here?

I am not sure what your intention is. In case you are looking for a counterpart 
to test a server implementation, you can have a look 
athttps://gitlab.com/guballa/tlsmate. With that tool you can create and execute 
arbitrary TLS handshake scenarios against TLS servers. The TLS-flags extension 
is not supported (yet), but setting up (or checking) any extension as a 
bytestring is possible. Basic python knowledge is required, though.
Thanks for sharing tlsmate!

To clarify the original request, we are asking about _existing_ implementations 
of draft-ietf-tls-flags or draft-ietf-tls-cross-sni-resumption. While one could 
implement either using tlsmate, that has not yet been done (as you point out).
When the chairs shift the I-Ds out of the WG to the AD (Area Director) [0], we 
also need to submit a write-up [0] that our AD and the rest of the IESG will 
review. One of the questions is whether there are existing implementations.
Thanks for the clarification. Is there a value reserved for the tls-flags extension? I couldn't find one, neither in the draft nor in the IANA registry.

Thanks,
Jens

Cheers,
spt

[0]https://www.ietf.org/chairs/document-writeups/
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