After some effort, I've managed to set up a JAASRealm that draws its
account information from our Kerberos server (Krb5LoginModule,
connecting to Open Directory on OS X Server 10.3.9).

One of the key security properties of Kerberos is that passwords are
never sent over the network, even in encrypted form.  However, since
users interact with Tomcat using HTTP, I think passwords are sent in
the clear, if using Basic authentication and encrypted if using Digest
authentication.  In either case, it would appear that I'm not
preserving the level of security I had with the Kerberos setup before.

So, would it make more sense to use account information from our Linux
machine (JAASRealm with UnixLoginModule), since that is sent over the
network in encrypted form when users login via ssh?   Is Digest
authentication about as secure as SSH?

If not, what's the easiest kind of Realm to set up which stores
passwords in an encrypted form, for a half dozen users?
(UserDatabaseRealm is right out.)


Doug Reeder
Cognitive & Systematic Musicology Lab
OSU School of Music


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