Lasso (Liberty Alliance Single Sign On) is an implementation of the Liberty Alliance specifications. These specifications define protocols for federated identities, single sign-on, etc. Lasso supports ID-FF 1.2, SAML 2.0, and parts of ID-WSF. It provides both a C library and bindings for several languages (Python, Java, Perl, PHP 4, and PHP 5).
This release fixes problems with signed SAML 2.0 URL strings, and checks against existing assertions to tell if authentication was required.
URL: Lasso - Free Liberty Alliance Single Sign On