We have a wikifarm with a number of wikis and central media
repositories. We are missing a single sign-on - presently, if someone
is signed into a wiki and uploads a file, this one has to sign in a
The "obvious" solution is to do the same as wikimedia, i.e.
However, the page above warns in no unclear words to rather use
$wgSharedDB (which we already do). But while this offers
single-authorization ("password storage"), it provides no single-sign
Advice? What are our options?