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#!/usr/bin/env python
import logging
from pymongo.mongo_client import MongoClient
__author__ = 'rolandh'
import time
from datetime import datetime
from saml2 import time_util
from saml2.cache import TooOld
from saml2.time_util import TIME_FORMAT
logger = logging.getLogger(__name__)
class Cache(object):
def __init__(self, server=None, debug=0, db=None):
if server:
connection = MongoClient(server)
else:
connection = MongoClient()
if db:
self._db = connection[db]
else:
self._db = connection.pysaml2
self._cache = self._db.collection
self.debug = debug
def delete(self, subject_id):
self._cache.delete_many({'subject_id': subject_id})
def get_identity(self, subject_id, entities=None,
check_not_on_or_after=True):
""" Get all the identity information that has been received and
are still valid about the subject.
:param subject_id: The identifier of the subject
:param entities: The identifiers of the entities whoes assertions are
interesting. If the list is empty all entities are interesting.
:return: A 2-tuple consisting of the identity information (a
dictionary of attributes and values) and the list of entities
whoes information has timed out.
"""
res = {}
oldees = []
if not entities:
for item in self._cache.find({"subject_id": subject_id}):
try:
info = self._get_info(item, check_not_on_or_after)
except TooOld:
oldees.append(item["entity_id"])
continue
for key, vals in info["ava"].items():
try:
tmp = set(res[key]).union(set(vals))
res[key] = list(tmp)
except KeyError:
res[key] = vals
else:
for entity_id in entities:
try:
info = self.get(subject_id, entity_id,
check_not_on_or_after)
except TooOld:
oldees.append(entity_id)
continue
for key, vals in info["ava"].items():
try:
tmp = set(res[key]).union(set(vals))
res[key] = list(tmp)
except KeyError:
res[key] = vals
return res, oldees
def _get_info(self, item, check_not_on_or_after=True):
""" Get session information about a subject gotten from a
specified IdP/AA.
:param item: Information stored
:return: The session information as a dictionary
"""
timestamp = item["timestamp"]
if check_not_on_or_after and not time_util.not_on_or_after(timestamp):
raise TooOld()
try:
return item["info"]
except KeyError:
return None
def get(self, subject_id, entity_id, check_not_on_or_after=True):
res = self._cache.find_one({"subject_id": subject_id,
"entity_id": entity_id})
if not res:
return {}
else:
return self._get_info(res, check_not_on_or_after)
def set(self, subject_id, entity_id, info, timestamp=0):
""" Stores session information in the cache. Assumes that the subject_id
is unique within the context of the Service Provider.
:param subject_id: The subject identifier
:param entity_id: The identifier of the entity_id/receiver of an
assertion
:param info: The session info, the assertion is part of this
:param timestamp: A time after which the assertion is not valid.
"""
if isinstance(timestamp, datetime) or isinstance(timestamp,
time.struct_time):
timestamp = time.strftime(TIME_FORMAT, timestamp)
doc = {
"subject_id": subject_id,
"entity_id": entity_id,
"info": info,
"timestamp": timestamp,
}
_ = self._cache.insert_one(doc)
def reset(self, subject_id, entity_id):
""" Scrap the assertions received from a IdP or an AA about a special
subject.
:param subject_id: The subjects identifier
:param entity_id: The identifier of the entity_id of the assertion
:return:
"""
self._cache.update({"subject_id": subject_id, "entity_id": entity_id},
{"$set": {"info": {}, "timestamp": 0}})
def entities(self, subject_id):
""" Returns all the entities of assertions for a subject, disregarding
whether the assertion still is valid or not.
:param subject_id: The identifier of the subject
:return: A possibly empty list of entity identifiers
"""
try:
return [i["entity_id"] for i in self._cache.find({"subject_id":
subject_id})]
except ValueError:
return []
def receivers(self, subject_id):
""" Another name for entities() just to make it more logic in the IdP
scenario """
return self.entities(subject_id)
def active(self, subject_id, entity_id):
""" Returns the status of assertions from a specific entity_id.
:param subject_id: The ID of the subject
:param entity_id: The entity ID of the entity_id of the assertion
:return: True or False depending on if the assertion is still
valid or not.
"""
item = self._cache.find_one({"subject_id": subject_id,
"entity_id": entity_id})
try:
return time_util.not_on_or_after(item["timestamp"])
except TooOld:
return False
def subjects(self):
""" Return identifiers for all the subjects that are in the cache.
:return: list of subject identifiers
"""
subj = [i["subject_id"] for i in self._cache.find()]
return list(set(subj))
def update(self, subject_id, entity_id, ava):
""" """
item = self._cache.find_one({"subject_id": subject_id,
"entity_id": entity_id})
info = item["info"]
info["ava"].update(ava)
self._cache.update({"subject_id": subject_id, "entity_id": entity_id},
{"$set": {"info": info}})
def valid_to(self, subject_id, entity_id, newtime):
""" """
self._cache.update({"subject_id": subject_id, "entity_id": entity_id},
{"$set": {"timestamp": newtime}})
def clear(self):
self._cache.delete_many({})
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