/usr/lib/python2.7/dist-packages/keystone/auth/ is in python-keystone 2:9.0.0-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/python2.7/dist-packages/keystone/auth/__init__.py
/usr/lib/python2.7/dist-packages/keystone/auth/controllers.py
/usr/lib/python2.7/dist-packages/keystone/auth/core.py
/usr/lib/python2.7/dist-packages/keystone/auth/plugins/
/usr/lib/python2.7/dist-packages/keystone/auth/plugins/__init__.py
/usr/lib/python2.7/dist-packages/keystone/auth/plugins/core.py
/usr/lib/python2.7/dist-packages/keystone/auth/plugins/external.py
/usr/lib/python2.7/dist-packages/keystone/auth/plugins/mapped.py
/usr/lib/python2.7/dist-packages/keystone/auth/plugins/oauth1.py
/usr/lib/python2.7/dist-packages/keystone/auth/plugins/password.py
/usr/lib/python2.7/dist-packages/keystone/auth/plugins/saml2.py
/usr/lib/python2.7/dist-packages/keystone/auth/plugins/token.py
/usr/lib/python2.7/dist-packages/keystone/auth/plugins/totp.py
/usr/lib/python2.7/dist-packages/keystone/auth/routers.py