By default Barbican has not enabled the Keystone authentication:
[pipeline:barbican_api]
pipeline = cors unauthenticated-context apiapp
According to the Barbican install guide[1] this pipeline should be:
pipeline = cors authtoken context apiapp
[1]: http://docs.openstack.org/developer/barbican/setup/keystone.html
Change-Id: I941515a98772a72762b20507e100e7872f3b4ab8
Closes-bug: #1625337