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# -*- coding: utf-8 -*-
from openid.store.interface import OpenIDStore
from openid.association import Association as OIDAssociation
from openid.extensions import sreg
import openid.store
from django.db.models.query import Q
from django.conf import settings
from django.http import str_to_unicode
# needed for some linux distributions like debian
try:
from openid.yadis import xri
except:
from yadis import xri
import time, base64, hashlib, operator
import urllib
from models import Association, Nonce
__all__ = ['OpenID', 'DjangoOpenIDStore', 'from_openid_response', 'clean_next']
DEFAULT_NEXT = getattr(settings, 'OPENID_REDIRECT_NEXT', '/')
def clean_next(next):
if next is None:
return DEFAULT_NEXT
next = str_to_unicode(urllib.unquote(next), 'utf-8')
next = next.strip()
if next.startswith('/'):
return next
return DEFAULT_NEXT
class OpenID:
def __init__(self, openid_, issued, attrs=None, sreg_=None):
self.openid = openid_
self.issued = issued
self.attrs = attrs or {}
self.sreg = sreg_ or {}
self.is_iname = (xri.identifierScheme(openid_) == 'XRI')
def __repr__(self):
return '<OpenID: %s>' % self.openid
def __str__(self):
return self.openid
class DjangoOpenIDStore(OpenIDStore):
def __init__(self):
self.max_nonce_age = 6 * 60 * 60 # Six hours
def storeAssociation(self, server_url, association):
assoc = Association(
server_url = server_url,
handle = association.handle,
secret = base64.encodestring(association.secret),
issued = association.issued,
lifetime = association.issued,
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
)
if not assocs:
return None
associations = []
for assoc in assocs:
association = OIDAssociation(
assoc.handle, base64.decodestring(assoc.secret), assoc.issued,
assoc.lifetime, assoc.assoc_type
)
if association.getExpiresIn() == 0:
self.removeAssociation(server_url, assoc.handle)
else:
associations.append((association.issued, association))
if not associations:
return None
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()) > openid.store.nonce.SKEW:
return False
query = [
Q(server_url__exact=server_url),
Q(timestamp__exact=timestamp),
Q(salt__exact=salt),
]
try:
ononce = Nonce.objects.get(reduce(operator.and_, query))
except Nonce.DoesNotExist:
ononce = Nonce(
server_url=server_url,
timestamp=timestamp,
salt=salt
)
ononce.save()
return True
ononce.delete()
return False
def cleanupNonce(self):
Nonce.objects.filter(timestamp<int(time.time()) - nonce.SKEW).delete()
def cleanupAssociations(self):
Association.objects.extra(where=['issued + lifetimeint<(%s)' % time.time()]).delete()
def getAuthKey(self):
# Use first AUTH_KEY_LEN characters of md5 hash of SECRET_KEY
return hashlib.md5(settings.SECRET_KEY).hexdigest()[:self.AUTH_KEY_LEN]
def isDumb(self):
return False
def from_openid_response(openid_response):
""" return openid object from response """
issued = int(time.time())
sreg_resp = sreg.SRegResponse.fromSuccessResponse(openid_response) \
or []
return OpenID(
openid_response.identity_url, issued, openid_response.signed_fields,
dict(sreg_resp)
)
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