OpenSAML
OpenSAML 1.0 is a set of open source Java and C++ libraries that are fully consistent with the SAML 1.0 and 1.1 CR specifications .
OpenSAML is a set of open-source libraries in Java and C++ which can be used to build, transport, and parse SAML messages. OpenSAML is able to store the individual information fields that make up a SAML message, build the correct XML representation, and parse XML back into the individual fields before handing it off to a recipient. OpenSAML supports the SOAP binding for the exchange of SAML request and response objects (C++ supports requesting only). It provides additional help in supporting the SAML browser/POST profile for web single sign-on. It does not currently provide any additional support for the artifact profile, but provides the machinery needed to implement it in other software. All core SAML constructs are now supported to some degree.OpenSAML has been produced by Internet2 members as part of their work on the Shibboleth project ( http://shibboleth.internet2.edu/ ). For non-researchers interested in single sign-on implementation using SAML, Shibboleth may suit your needs directly, while using OpenSAML would require significant additional work. For more detailed information about OpenSAML's APIs and limitations, please refer to http://www.opensaml.org .