On Donnerstag, 24. Januar 2019 21:03:27 CET Evgeny wrote:
> On Thu, Jan 24, 2019 at 9:15 PM, Dave Cridland <[email protected]>
> 
> wrote:
> > XMPP-Grid (that draft) essentially says both servers and clients MUST
> > implement EXTERNAL, SCRAM-SHA1, SCRAM-SHA1-PLUS, SCRAM-SHA-256, and
> > SCRAM-SHA-256-PLUS.
> > 
> > Is there any interest in updating our MTI?
> 
> How can we require SHA-256 when we don't have any way to upgrade
> existing deployments from SHA-1? Leaving the burden to the operators
> again, because this is out of scope of XSF? :)
> Some already suggested "solving" this by forcing password
> renewal, but we don't have any mechanisms to do this in XMPP.
> 
> I personally prefer:
> 1) MUST for EXTERNAL and PLAIN
> 2) SHOULD for SCRAM-SHA-X-Y (I'd prefer not to use SCRAM at all
>    given all the problems I have described in another thread)

My understanding is that Dave talks about Mandatory To Implement, which is 
something different than Mandatory To Deploy / Mandatory To Offer (at least 
that’s what I get from reading the relevant section in RFC 6120).

I don’t see any harm in requiring SCRAM-* implementations, even taking into 
account the migration issues.

kind regards,
Jonas

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