/usr/share/pyshared/keystone/contrib/ is in python-keystone 2012.1.1-13+wheezy1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/pyshared/keystone/contrib/__init__.py
/usr/share/pyshared/keystone/contrib/admin_crud/
/usr/share/pyshared/keystone/contrib/admin_crud/__init__.py
/usr/share/pyshared/keystone/contrib/admin_crud/core.py
/usr/share/pyshared/keystone/contrib/ec2/
/usr/share/pyshared/keystone/contrib/ec2/__init__.py
/usr/share/pyshared/keystone/contrib/ec2/backends/
/usr/share/pyshared/keystone/contrib/ec2/backends/__init__.py
/usr/share/pyshared/keystone/contrib/ec2/backends/kvs.py
/usr/share/pyshared/keystone/contrib/ec2/backends/sql.py
/usr/share/pyshared/keystone/contrib/ec2/core.py
/usr/share/pyshared/keystone/contrib/s3/
/usr/share/pyshared/keystone/contrib/s3/__init__.py
/usr/share/pyshared/keystone/contrib/s3/core.py