Authentication in IBM Websphere Portal
I'm involved in an Java Web Application Migration project to IBM Websphere Portal (IBM WP) Platform.
The actual application in production environment validates manually user credentials (username and password) against a Database Table that stores the data. I understand that the idea behind a Portal application is that the Portal Container handles this Security issues, but I'm not sure how IBM WP can consume the credentials that now are on Database.
There's a brand new Tivoli Directory Server in the Company, and I'm aware that I can't connect IBM WP to this LDAP Server so, do I need to migrate every user in the Database to this LDAP Server, or there's a Way that Tivoli recognize the credentials that are on the database?
You can hook in any kind of custom authentication you need using a Trust Association Interceptor. Your custom authenticator would probably work a lot like the authentication code in your existing system. It would display a page prompting the user for their credentials, and then check them against the DB.
I'm not sure how this relates to your Tivoli LDAP, but there seems to be a provided TAI for TAM integration: Tivoli Access Manager Trust Association Interceptor (TAI++)
Trust Association Interceptor are powerful, but they totally override Websphere Authentication mechanisms, so be sure to write a quite robust one! As Carlos Gavidia suggested, I'd also give a look to Custom User Registry. I'd also suggest to consider Property Extenstion Repository (also know as Lookaside), so you can define your own attributes and read/write them directly from Portal API