Open Stack

Hi, I'd like you to take a look at this patch for potential
SecurityImpact.
https://review.openstack.org/117372

Log:
commit 1966cc2674d508effa6bc1fe1d3b93ea74f4f172
Author: Brant Knudson <bknudson at us.ibm.com>
Date:   Wed Aug 27 17:53:41 2014 -0500

    token signing support alternative message digest
    
    The functions for creating signed tokens in common.cms always used
    sha256 for the message digest. This might be inadequate in the future
    so the digest algorithm shouldn't be hard-coded. A parameter is added
    to allow choosing a different digest algorithm.
    
    SecurityImpact
    
    Change-Id: Ie19d093d0494443ce4cd880ae1f92dffd5c361ef
    Related-Bug: #1362343