Open Stack

There exist a couple of Python libraries that might to be reused for OpenStack 
Auth:

1. python-crack (http://pypi.python.org/pypi/python-crack/0.5) can be used 
for evaluating password strength before registering users
2. PySAML2 (https://launchpad.net/pysaml2) can be used for adding SAML 
functionality

Also, when developing a password storage functionality, a suggestion 
from "Electronic Authentication Guideline" by NIST might be useful:
"store passwords concatenated to a salt and/or username and then hashed with 
approved algorithm so that the computations used to conduct a dictionary or 
exhaustion attack on a stolen password file are not useful to attack other 
similar password files"

Best Regards,
Rostik