I have a Drupal site I am standing up for a client. I've been asked to use Single Sign on using SAML2 (where I would be the service provider and my client would be the identity provider).
The best thing I have found so far has been either
SimpleSAMLPHP https://ow.feide.no/simplesamlphp:drupal
or
Shibboleth -- http://drupal.org/project/shib_auth
From looking at the documentation from these it looks like the Shibboleth module might be further ahead, but I'm not sure that you can connect Shibboleth to SAML. Can you? Or do you need to connect to a Shibboleth identity provider?
The SimpleSAML module looks good, except it seems to require memcache which I would prefer to not use.
Thanks!