XWiki to Apache Mellon?

Hi,
In my project I need to use authentication based on SAML 2.0 and in the official site I can find only Authenticator Jasig CAS which supports SAML 1.1, but not higher version of protocol.

I am wondering if it is possible to connect XWiki to Apache Mellon in order to use reverse proxy feature (it is established solution in my environment and would be the best because does not involve further complications)?

Or is there any other way to ensure SAML 2.0 authentication for XWiki?

Thanks in advance for reply,
Best regards.