On Mon, 16 Jan 2023, at 13:54, Alan DeKok wrote:
> And as a related note, if the PAC goes away, so does the Authority-ID 
> TLV, and related things like A-ID.

I was wondering what to do with A-ID[1] (and everything around PAC-Info) but 
starting to figure that as you can stuff anything you want into the opaque 
SessionTicket it really does not matter.

>  And just going through all of the possible corner cases, should we  
> also mention TLS-PSK?  I don't think anyone has implemented support for 
> using PSK instead of client certificates, but it's possible.  Perhaps 
> it's worth mentioning, and suggesting that TLS-PSK isn't a good idea?

Not aware this has even been implemented by anyone even for RADIUS (D)TLS yet, 
right?

Maybe time to hammer out a TLS-PSK implementation just to see what this looks 
and smells like? Previous RFC's have described that TLS-PSK is supported but 
someone here (or was it radext) pointed out that there is no mention of a PSK 
Identity which is needed not just the keying material.

Maybe I am mis-reading it but I think TLS-PSK has effectively been given the 
kibosh by RFC9190 section 2.1.1: "Pre-Shared Key (PSK) authentication SHALL NOT 
be used except for resumption"?

Cheers

[1] https://github.com/emu-wg/rfc7170bis/issues/4#issuecomment-1370776188

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