pypa/pip — pull request #615 by pnasrat (2012-07-29 10:40:42+00:00)
Title: Issue #597 pypy hashlib compat.

Hash attribute name is a cpython implementation detail and not in the
PEP.

Use digest_size for some form of validation as that is all we can rely
on.

TESTED 2.7, 3.3, pypy 1.9