IDP 3 user authentication with oracle DB as back end

[Rod Widdowson]

> If JAAS is the only option for this, how do I configure the JAAS module with IDP ??

It is the one that most people use.  There are people on these lists who have used such things and will provider pointers.  Otherwise google is your friend (+jaas +jdbc)

> if the user is authenticated via jaas module and how the IDP will get to know 
> the principal details ?? Basically how the communication between them will work ??

AFAICS is to say the username that the user supplied is popped into an appropriate Principal which feeds into the downstream flows.