On Wed, Dec 11, 2019 at 12:48:58PM -0500, Russ Housley wrote:
> Mirja:
> 
> > ----------------------------------------------------------------------
> > COMMENT:
> > ----------------------------------------------------------------------
> > 
> > Just a small thing to double-check: I wonder if this sentence would actually
> > require an update to RFC8446:
> >   "TLS 1.3 does not permit the server to send a CertificateRequest
> >   message when a PSK is being used.  This restriction is removed when
> >   the "tls_cert_with_extern_psk" extension is negotiated, allowing
> >   certificate-based authentication for both the client and the server."
> > Or maybe it should be phrased differently, just:
> > "If the "tls_cert_with_extern_psk" extension is negotiated, 
> > certificate-based
> > authentication is allowed for both the client and the server." I guess it
> > depends on what exactly is said in RFC8446 (and I didn't went and tried to 
> > find
> > it).
> 
> I do not believe that an update is needed or appropriate.  First, the 
> presence of this extension is an indication that this behavior will be 
> different.  Second, this is going to be an Experimental RFC, so it should not 
> update a standards-track RFC.

I agree; this is just an extension working as normal.  (Not that I haven't
asked the same question before for other documents....)

-Ben

> > And as a side note, it is usually recommended to provide the link to the
> > registry in the IANA section (to make life for IANA easier)
> 
> I will gladly add a reference to the registry:
> 
> https://www.iana.org/assignments/tls-extensiontype-values/tls-extensiontype-values.xhtml
> 
> Russ
> 

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