119 lines
3.5 KiB
Python
119 lines
3.5 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright (c) 2011 OpenStack, LLC.
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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"""Policy engine for keystone"""
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import os.path
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from keystone.common import utils
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from keystone import config
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from keystone import exception
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from keystone.openstack.common import log
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from keystone.openstack.common import policy as common_policy
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from keystone import policy
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CONF = config.CONF
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LOG = log.getLogger(__name__)
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_ENFORCER = None
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_POLICY_PATH = None
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_POLICY_CACHE = {}
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def reset():
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global _POLICY_PATH
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global _POLICY_CACHE
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global _ENFORCER
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_POLICY_PATH = None
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_POLICY_CACHE = {}
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_ENFORCER = None
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def init():
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global _POLICY_PATH
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global _POLICY_CACHE
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global _ENFORCER
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if not _POLICY_PATH:
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_POLICY_PATH = CONF.policy_file
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if not os.path.exists(_POLICY_PATH):
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_POLICY_PATH = CONF.find_file(_POLICY_PATH)
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if not _ENFORCER:
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_ENFORCER = common_policy.Enforcer(policy_file=_POLICY_PATH)
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utils.read_cached_file(_POLICY_PATH,
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_POLICY_CACHE,
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reload_func=_set_rules)
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def _set_rules(data):
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global _ENFORCER
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default_rule = CONF.policy_default_rule
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_ENFORCER.set_rules(common_policy.Rules.load_json(
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data, default_rule))
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def enforce(credentials, action, target, do_raise=True):
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"""Verifies that the action is valid on the target in this context.
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:param credentials: user credentials
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:param action: string representing the action to be checked, which
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should be colon separated for clarity.
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:param target: dictionary representing the object of the action
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for object creation this should be a dictionary
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representing the location of the object e.g.
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{'project_id': object.project_id}
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:raises: `exception.Forbidden` if verification fails.
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Actions should be colon separated for clarity. For example:
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* identity:list_users
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"""
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init()
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# Add the exception arguments if asked to do a raise
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extra = {}
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if do_raise:
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extra.update(exc=exception.ForbiddenAction, action=action,
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do_raise=do_raise)
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return _ENFORCER.enforce(action, target, credentials, **extra)
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class Policy(policy.Driver):
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def enforce(self, credentials, action, target):
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LOG.debug(_('enforce %(action)s: %(credentials)s'), {
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'action': action,
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'credentials': credentials})
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enforce(credentials, action, target)
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def create_policy(self, policy_id, policy):
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raise exception.NotImplemented()
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def list_policies(self):
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raise exception.NotImplemented()
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def get_policy(self, policy_id):
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raise exception.NotImplemented()
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def update_policy(self, policy_id, policy):
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raise exception.NotImplemented()
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def delete_policy(self, policy_id):
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raise exception.NotImplemented()
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