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# Copyright (C) 2012 by the Free Software Foundation, Inc.
#
# This file is part of GNU Mailman.
#
# GNU Mailman 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 3 of the License, or (at your option)
# any later version.
#
# GNU Mailman 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
# GNU Mailman. If not, see <http://www.gnu.org/licenses/>.
"""A wrapper around passlib."""
from __future__ import absolute_import, print_function, unicode_literals
__metaclass__ = type
__all__ = [
'initialize',
]
from passlib.context import CryptContext
from pkg_resources import resource_string
from zope import event
from mailman.interfaces.configuration import ConfigurationUpdatedEvent
class PasswordContext:
def __init__(self, config):
# Is the context coming from a file system or Python path?
if config.passwords.path.startswith('python:'):
resource_path = config.passwords.path[7:]
package, dot, resource = resource_path.rpartition('.')
config_string = resource_string(package, resource + '.cfg')
else:
with open(config.passwords.path, 'rb') as fp:
config_string = fp.read()
self._context = CryptContext.from_string(config_string)
def encrypt(self, secret):
return self._context.encrypt(secret)
def verify(self, hashed, password):
# Support hash algorithm migration. Yes, the order of arguments is
# reversed, for backward compatibility with flufl.password. XXX fix
# this eventually.
return self._context.verify_and_update(password, hashed)
# Create and register a post-processing handler for the configuration file.
def _update_context(event):
if isinstance(event, ConfigurationUpdatedEvent):
# Just reset the password context.
event.config.password_context = PasswordContext(event.config)
def initialize():
event.subscribers.append(_update_context)
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