WordPress MU

We're evaluting Wordpress MU at UMICH and need to integrate it with our SSO, CoSign

Looking at the "CASsification" thread and the LDAP Authorization Plugin, they both seem to modify wp-content/mu-plugins/pluggable.php

Is there a way to hook into the login process w/o modifying the wordpress source code?

Like basic auth, cosign assigns the user name to $_SERVER['REMOTE_USER']. In it's most basic incarnation, this plugin would need to...

• try to log user in using username = REMOTE_USER
• if an account doesn't exist, offer them the signup screen (but only offer about blog creation / "just an account please"). The other stuff (username, email address) would already be filled out and not changable

This is my first wordpress plugin.. and it's wordpress MU (does that change things a lot?).

Any pointers?
Liam

if you think it is possible to ADD a hook to the login process and make it so your plugin would work properly, you can make a request to Donncha so he can add a hook to the next release, and then you would not have to edit the script anymore.

any kind of hook can be added to any script of the WPMU, you just have to ask...

So, right now I would need to edit wp-content/mu-plugins/pluggable.php?