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# Copyright (c) 2011 OpenStack, LLC.
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
"""Policy engine for keystone"""
from oslo_config import cfg
from oslo_log import log
from oslo_policy import policy as common_policy
from keystone import exception
from keystone import policy
CONF = cfg.CONF
LOG = log.getLogger(__name__)
_ENFORCER = None
def reset():
global _ENFORCER
_ENFORCER = None
def init():
global _ENFORCER
if not _ENFORCER:
_ENFORCER = common_policy.Enforcer(CONF)
def enforce(credentials, action, target, do_raise=True):
"""Verifies that the action is valid on the target in this context.
:param credentials: user credentials
:param action: string representing the action to be checked, which
should be colon separated for clarity.
:param target: dictionary representing the object of the action
for object creation this should be a dictionary
representing the location of the object e.g.
{'project_id': object.project_id}
:raises: `exception.Forbidden` if verification fails.
Actions should be colon separated for clarity. For example:
* identity:list_users
"""
init()
# Add the exception arguments if asked to do a raise
extra = {}
if do_raise:
extra.update(exc=exception.ForbiddenAction, action=action,
do_raise=do_raise)
return _ENFORCER.enforce(action, target, credentials, **extra)
class Policy(policy.Driver):
def enforce(self, credentials, action, target):
LOG.debug('enforce %(action)s: %(credentials)s', {
'action': action,
'credentials': credentials})
enforce(credentials, action, target)
def create_policy(self, policy_id, policy):
raise exception.NotImplemented()
def list_policies(self):
raise exception.NotImplemented()
def get_policy(self, policy_id):
raise exception.NotImplemented()
def update_policy(self, policy_id, policy):
raise exception.NotImplemented()
def delete_policy(self, policy_id):
raise exception.NotImplemented()
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