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#
# Copyright (c) 2016 ThoughtWorks, Inc.
#
# Pixelated is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Pixelated 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 Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with Pixelated. If not, see <http://www.gnu.org/licenses/>.
import hashlib
import os
from zope.interface import Interface, Attribute, implements
from twisted.python.components import registerAdapter
from twisted.web.server import Session
CSRF_TOKEN_LENGTH = 32
class IPixelatedSession(Interface):
user_uuid = Attribute('The uuid of the currently logged in user')
class PixelatedSession(object):
implements(IPixelatedSession)
def __init__(self, session):
self.user_uuid = None
self._csrf_token = None
def is_logged_in(self):
return self.user_uuid is not None
def expire(self):
self.user_uuid = None
def get_csrf_token(self):
if self._csrf_token is None:
self._csrf_token = hashlib.sha256(os.urandom(CSRF_TOKEN_LENGTH)).hexdigest()
return self._csrf_token
registerAdapter(PixelatedSession, Session, IPixelatedSession)
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