# -*- coding: utf-8 -*-
##
## This file is part of Invenio.
## Copyright (C) 2013 CERN.
##
## Invenio is free software; you can redistribute it and/or
## modify it under the terms of the GNU General Public License as
## published by the Free Software Foundation; either version 2 of the
## License, or (at your option) any later version.
##
## Invenio is distributed in the hope that it will be useful, but
## WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
## General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with Invenio; if not, write to the Free Software Foundation, Inc.,
## 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.

"""
Invenio hash functions.

Usage example:
  >>> from invenio.hashutils import md5
  >>> print md5('MyPa$$')

Simplifies imports of hash functions depending on Python version.
"""

try:
    from hashlib import sha256, sha1, md5
    HASHLIB_IMPORTED = True
except ImportError:
    from md5 import md5
    from sha import sha as sha1
    HASHLIB_IMPORTED = False
