Federated Single Sign-On for Google Apps in OpenSSO

By Wajih Ahmed and Marina Sum, November 12, 2008; updated: December 8, 2008

With OpenSSO, Sun's open-source Web access management project, you can implement federation for applications, such as Google Apps, for single sign-on (SSO) in just a few steps. Google Apps are widely adopted by enterprises for email, calendar, and collaboration through Google Docs, Google Video, and so forth.

This article steps you through the federation process, whereby OpenSSO acts as the identity provider (IdP) and Google Apps as the service provider (SP). Security Assertion Markup Language (SAML) version 2 serves as the SSO protocol for creating a Circle of Trust on the IdP.

Note: Four of the five steps that follow are demonstrated in videos. To play them on your browser, you must have the Apple QuickTime plug-in installed. Find the details from its original link below.

(Original source : http://www.blogger.com/post-create.g?blogID=8130330909273564552)