Currently there is no out-of-box support for SAML 2.0 tokens within Spring Security.
It is desirable to enhance Spring Security to allow support for SAML 2 Tokens as described in
SAML Token Profile 1.1 of OASIS WSS <http://www.oasis-open.org/committees/download.php/16768/wss-v1.1-spec-os-SAMLTokenProfile.pdf>.
The solution should provide a Acegi Security plugin for SAML 2 compliant Authentication Authority.
There appears to be people out there that have developed extensions to Spring Security to support SAML 2 and are looking for a way
to contribute it to the project:
Perhaps such work from community members may be relevant and help get a solid start on meeting this RFE.