Liferay 6.1 EE comes with SAML 2.0 Identity Provider and Service
Provider support via SAML plugin. If you are not familiar with SAML
check out my Introduction to SAML presentation slides.
In this post we will configure Liferay to be SAML Identity Provider
and configure Salesforce to be a Service Provider. After we are done
we have a user that can move from Liferay to Salesforce without
requiring to authenticate on Salesforce. More