IdPAuthUserPass - JAAS login modules?

[Joaquin Menchaca]

I was reading up on the IdPAuthUserPass, and I was wondering, what types
of login modules are available out of the box?  The wiki, documents
Kerberos (Sun's driver) and LDAP (Virginia Tech).

Are there different drivers depending on what JDK, e.g. OpenJDK vs.
Oracle/Sun's JDK? 

I was exploring how to enter simple authentication, without implementing
a LDAP or Kerberos server, but I am confused about this part of the
puzzle. 

If I do, let's say user/password through a configuration in JAAS, this
won't work overall because I need to pull attributes from somewhere?  Or
can I hardwire something to prove communication works?  My target SP
(Salesforce) requires some attribute to be configured.

- Joaquin

Source:
- https://wiki.shibboleth.net/confluence/display/SHIB2/IdPAuthUserPass