jaas+krb5 vs krb5 backed password authentication

Liam Hoekenga liamr at umich.edu
Wed Mar 27 13:39:05 EDT 2019


Is the JAAS configuration that actually authenticated the user available to
shibboleth somehow outside of the authentication event itself?  Maybe in
the subject?

On Tue, Mar 26, 2019 at 7:13 PM Cantor, Scott <cantor.2 at osu.edu> wrote:

> On 3/26/19, 7:08 PM, "users on behalf of Liam Hoekenga" <
> users-bounces at shibboleth.net on behalf of liamr at umich.edu> wrote:
>
> > Here's our jaas.config...
>
> You're telling it to authenticate itself as a service principal, so that's
> what it does. It's not doing anything with the user's credentials at all.
>
> Sun's Kerberos module has no support for KDC verification. Giving it a
> keytab doesn't make that happen, it just bypasses the user login and turns
> into a service login. The IdP should probably be a bit more safe there and
> verify the principal coming back. I thought it did, but I would have to
> look at it. That's a reasonable enhancement, maybe just with some kind of
> pluggable comparison function, but there's no inherent contract in JAAS
> that lets the IdP verify the results of a module, all it really knows is
> the login() method didn't fail.
>
> -- Scott
>
>
>
>
> --
> For Consortium Member technical support, see
> https://wiki.shibboleth.net/confluence/x/coFAAg
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