CAS and Squirrelmail

[mauria@itu.dk]

I'm working on a CAS (version 3.0.5) solution, where I would like to have
Squirrelmail authenticate against CAS. My Squirrelmail is running on a
Cyrus IMAP server (whitch in turn authenticates against an LDAP server)
and I’ve got the CAS server running with Apache Tomcat 5 on Fedora Core 6.

I’m about to configure Cyrus to use pam_cas (which hopefully is fairly
straightforward), but my problem is, that I don’t know how to configure
Squirrelmail to become CAS-friendly (bypassing the login-screen if the
user is already authenticated against CAS). I suspect that I have to do
some tweaking of Squirrelmails login.php and redirect.php!? Has anyone has
had success doing this, and how?

thx in advance,
Rasmus