Open Stack

Hi, I'd like you to take a look at this patch for potential
SecurityImpact.
https://review.openstack.org/80398

Log:
commit 7287a25d38933fb57f9d3647f6ffb6ee1ee492a8
Author: Brant Knudson <bknudson at us.ibm.com>
Date:   Thu Mar 13 15:38:34 2014 -0500

    Support token hash algorithm
    
    PKI Tokens were always hashed with MD5. This change allows
    tokens to be hashed with SHA256 or any other algorithm
    supported by hashlib. This is for security hardening.
    
    If the token metadata contains 'hash_algorithm' then that
    will be used as the hash algorithm. For backwards
    compatibility if the token metadata doesn't contain a
    hash algorithm then MD5 is used.
    
    SecurityImpact
    DocImpact
    Closes-Bug: #1174499
    
    Change-Id: Ie524125dc5f6f1076bfd47db3a414b178e4dac80