/usr/lib/python3/dist-packages/keystonemiddleware/auth_token/ is in python3-keystonemiddleware 4.21.0-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/python3/dist-packages/keystonemiddleware/auth_token/__init__.py
/usr/lib/python3/dist-packages/keystonemiddleware/auth_token/_auth.py
/usr/lib/python3/dist-packages/keystonemiddleware/auth_token/_base.py
/usr/lib/python3/dist-packages/keystonemiddleware/auth_token/_cache.py
/usr/lib/python3/dist-packages/keystonemiddleware/auth_token/_exceptions.py
/usr/lib/python3/dist-packages/keystonemiddleware/auth_token/_identity.py
/usr/lib/python3/dist-packages/keystonemiddleware/auth_token/_memcache_crypt.py
/usr/lib/python3/dist-packages/keystonemiddleware/auth_token/_opts.py
/usr/lib/python3/dist-packages/keystonemiddleware/auth_token/_request.py
/usr/lib/python3/dist-packages/keystonemiddleware/auth_token/_revocations.py
/usr/lib/python3/dist-packages/keystonemiddleware/auth_token/_signing_dir.py
/usr/lib/python3/dist-packages/keystonemiddleware/auth_token/_user_plugin.py