'Ucam Federation' IdP metadata

If you just want your Shibboleth SP to be able to authenticate people from the University using Raven then you only need to supply your SP with metadata describing the Shibboleth IdP provided by Raven (on the other hand, if you want to be able to identify people from all the members of the UK federation then you need a different, bigger, set of metadata).

This Raven metadata can be collected from

 https://shib.raven.cam.ac.uk/ucamfederation-idp2-metadata.xml

The internal use example shibboleth.xml file configures shibd to automatically load this data over the network and to cache it locally.

In due course this file might be signed.