[Dovecot] Auth protocol and XMPP

[Kim Alvefur]

Hello.

I've written an authentication backend for the XMPP server Prosody,
which makes it use Dovecots auth socket and protocol, and letting the
client use any SASL mechanism Dovecot offers.

However, setups using the full user at domain as authnid won't work, due to
most XMPP clients assuming that the authnid is the localpart.

I want to avoid hardcoding it to PLAIN, or otherwise doing MITM/rewrites
if possible. (There exists an older auth backend that does just that
already)

Ideas?

-- 
Kim Alvefur <zash at zash.se>