#!/usr/bin/python3
# -*- coding: utf-8 -*-
#
# Copyright 2021-2022 Univention GmbH
#
# https://www.univention.de/
#
# All rights reserved.
#
# The source code of this program is made available
# under the terms of the GNU Affero General Public License version 3
# (GNU AGPL V3) as published by the Free Software Foundation.
#
# Binary versions of this program provided by Univention to you as
# well as other copyrighted, protected or trademarked materials like
# Logos, graphics, fonts, specific documentations and configurations,
# cryptographic keys etc. are subject to a license agreement between
# you and Univention and not subject to the GNU AGPL V3.
#
# In the case you use this program under the terms of the GNU AGPL V3,
# the program is provided 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 with the Debian GNU/Linux or Univention distribution in file
# /usr/share/common-licenses/AGPL-3; if not, see
# <https://www.gnu.org/licenses/>.
#
from univention.ldap_cache.log import debug
DB_DIRECTORY = '/usr/share/univention-group-membership-cache/caches'
[docs]class Caches(object):
def __init__(self, db_directory=DB_DIRECTORY):
self._directory = db_directory
self._caches = {}
def __iter__(self):
for name, cache in self._caches.items():
yield name, cache
[docs] def get_shards_for_query(self, query):
ret = []
for cache in self._caches.values():
for shard in cache.shards:
if shard.ldap_filter == query:
ret.append(shard)
return ret
[docs] def get_sub_cache(self, name):
return self._caches.get(name)
[docs] def add(self, klass):
if not klass.ldap_filter or not klass.value:
return
debug('Adding %r', klass)
name = klass.db_name or klass.__name__
cache = self.get_sub_cache(name)
if cache is None:
cache = self._add_sub_cache(name, klass.single_value, klass.reverse)
cache.add_shard(klass)
def _add_sub_cache(self, name, single_value):
raise NotImplementedError()
[docs]class Shard(object):
ldap_filter = None
db_name = None
single_value = False
key = 'entryUUID'
value = None
attributes = []
reverse = False
def __init__(self, cache):
self._cache = cache
[docs] def rm_object(self, obj):
try:
key = self.get_key(obj)
except ValueError:
return
values = self.get_values(obj)
debug('Removing %s', key)
self._cache.delete(key, values)
[docs] def add_object(self, obj):
try:
key = self.get_key(obj)
except ValueError:
return
debug('Adding %s', key)
values = self.get_values(obj)
if values:
self._cache.save(key, values)
else:
self._cache.delete(key, [])
def _get_from_object(self, obj, attr):
if attr == 'dn':
return [obj[0]]
return obj[1].get(attr, [])
[docs] def get_values(self, obj):
return _s(self._get_from_object(obj, self.value))
[docs] def get_key(self, obj):
values = self._get_from_object(obj, self.key)
if values:
return _s(values[0]).lower()
raise ValueError(self.key)
[docs]class LdapCache(object):
def __init__(self, name, single_value, reverse):
self.name = name
self.single_value = single_value
self.reverse = reverse
self.shards = []
[docs] def add_shard(self, shard_class):
self.shards.append(shard_class(self))
def _s(input):
if isinstance(input, (list, tuple)):
res = []
for n in input:
if isinstance(n, bytes):
res.append(n.decode('utf-8'))
elif isinstance(list, tuple):
res.append(_s(n))
else:
res.append(n)
elif isinstance(input, bytes):
res = input.decode('utf-8')
else:
res = input
return res
