Red Hat Bugzilla – Bug 1268132
SAML plugin doesn't work with mod_auth_mellon - 303 redirect ignored
Last modified: 2016-04-26 14:52:20 EDT
The SAML plugin hooks the http redirect code as ECP doesn't correctly follow the HTTP spec in this regard. Currently the plugin specifically looks for a 302 redirection and handles it however it should also handle the 303 redirect code as this is ambiguous in the specification and what mod_auth_mellon uses.
This is fixed upstream in python-keystoneclient 1.8.0, and it was also backported to the 1.7.2 release on the stable/liberty branch here: https://review.openstack.org/230231 RHEL OSP 8 is currently including python-keystoneclient-1.7.2-1.el7ost, which includes this fix.
Verified for python-keystoneclient-1.7.2-1.el7ost. Federation setup with: VM 1: OpenStack + mod_mellon (openstack.rduartes.unknown.test) VM 2: Ipsilon backed by FreeIPA (ipa.rduartes.unknown.test) In order to test if it is working we may try to get an unscoped token via Federation and using a python-keystoneclient plugin: from keystoneclient.contrib.auth.v3 import saml2 from keystoneclient import session from keystoneclient.v3 import client # Try to authenticate in the IdP and than use the credentials in the SP saml2_auth = saml2.Saml2UnscopedToken(auth_url='https://openstack.rduartes.unknown.test:5000/v3', identity_provider='ipsilon', identity_provider_url='https://ipa.rduartes.unknown.test/idp/saml2/SSO/SOAP', username='rduartes', password='rduartes') # This bug is similar to bug #1256995, the failure would occur during the Session creation (it will receive the 303 redirect) sess = session.Session(auth=saml2_auth) # Try to actually use the federated credentials ks = client.Client(session=sess) print('Try to list projects:') print(ks.federation.projects.list())
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://rhn.redhat.com/errata/RHEA-2016-0603.html