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# django-openid-auth - OpenID integration for django.contrib.auth
#
# Copyright (C) 2007 Simon Willison
# Copyright (C) 2008-2010 Canonical Ltd.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
#
# * Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
import base64
import time
from openid.association import Association as OIDAssociation
from openid.store.interface import OpenIDStore
from openid.store.nonce import SKEW
from django_openid_auth.models import Association, Nonce
class DjangoOpenIDStore(OpenIDStore):
def __init__(self):
self.max_nonce_age = 6 * 60 * 60 # Six hours
def storeAssociation(self, server_url, association):
try:
assoc = Association.objects.get(
server_url=server_url, handle=association.handle)
except Association.DoesNotExist:
assoc = Association(
server_url=server_url,
handle=association.handle,
secret=base64.encodestring(association.secret),
issued=association.issued,
lifetime=association.lifetime,
assoc_type=association.assoc_type)
else:
assoc.secret = base64.encodestring(association.secret)
assoc.issued = association.issued
assoc.lifetime = association.lifetime
assoc.assoc_type = association.assoc_type
assoc.save()
def getAssociation(self, server_url, handle=None):
assocs = []
if handle is not None:
assocs = Association.objects.filter(
server_url=server_url, handle=handle)
else:
assocs = Association.objects.filter(server_url=server_url)
associations = []
expired = []
for assoc in assocs:
association = OIDAssociation(
assoc.handle, base64.decodestring(assoc.secret), assoc.issued,
assoc.lifetime, assoc.assoc_type
)
if association.getExpiresIn() == 0:
expired.append(assoc)
else:
associations.append((association.issued, association))
for assoc in expired:
assoc.delete()
if not associations:
return None
associations.sort()
return associations[-1][1]
def removeAssociation(self, server_url, handle):
assocs = list(Association.objects.filter(
server_url=server_url, handle=handle))
assocs_exist = len(assocs) > 0
for assoc in assocs:
assoc.delete()
return assocs_exist
def useNonce(self, server_url, timestamp, salt):
if abs(timestamp - time.time()) > SKEW:
return False
try:
ononce = Nonce.objects.get(
server_url__exact=server_url,
timestamp__exact=timestamp,
salt__exact=salt)
except Nonce.DoesNotExist:
ononce = Nonce(
server_url=server_url,
timestamp=timestamp,
salt=salt)
ononce.save()
return True
return False
def cleanupNonces(self, _now=None):
if _now is None:
_now = int(time.time())
expired = Nonce.objects.filter(timestamp__lt=_now - SKEW)
count = expired.count()
if count:
expired.delete()
return count
def cleanupAssociations(self):
now = int(time.time())
expired = Association.objects.extra(
where=['issued + lifetime < %d' % now])
count = expired.count()
if count:
expired.delete()
return count
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