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OpenStack Study: rules.py**** CubicPower OpenStack Study ****
# 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""" import os.path from keystone.common import utils from keystone import config from keystone import exception from keystone.openstack.common.gettextutils import _ from keystone.openstack.common import log from keystone.openstack.common import policy as common_policy from keystone import policy CONF = config.CONF LOG = log.getLogger(__name__) _ENFORCER = None _POLICY_PATH = None _POLICY_CACHE = {}
**** CubicPower OpenStack Study **** def reset(): global _POLICY_PATH global _POLICY_CACHE global _ENFORCER _POLICY_PATH = None _POLICY_CACHE = {} _ENFORCER = None
**** CubicPower OpenStack Study **** def init(): global _POLICY_PATH global _POLICY_CACHE global _ENFORCER if not _POLICY_PATH: _POLICY_PATH = CONF.policy_file if not os.path.exists(_POLICY_PATH): _POLICY_PATH = CONF.find_file(_POLICY_PATH) if not _ENFORCER: _ENFORCER = common_policy.Enforcer(policy_file=_POLICY_PATH) utils.read_cached_file(_POLICY_PATH, _POLICY_CACHE, reload_func=_set_rules)
**** CubicPower OpenStack Study **** def _set_rules(data): global _ENFORCER default_rule = CONF.policy_default_rule _ENFORCER.set_rules(common_policy.Rules.load_json( data, default_rule))
**** CubicPower OpenStack Study **** 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)
**** CubicPower OpenStack Study **** class Policy(policy.Driver):
**** CubicPower OpenStack Study **** def enforce(self, credentials, action, target): LOG.debug(_('enforce %(action)s: %(credentials)s'), { 'action': action, 'credentials': credentials}) enforce(credentials, action, target)
**** CubicPower OpenStack Study **** def create_policy(self, policy_id, policy): raise exception.NotImplemented()
**** CubicPower OpenStack Study **** def list_policies(self): raise exception.NotImplemented()
**** CubicPower OpenStack Study **** def get_policy(self, policy_id): raise exception.NotImplemented()
**** CubicPower OpenStack Study **** def update_policy(self, policy_id, policy): raise exception.NotImplemented()
**** CubicPower OpenStack Study **** def delete_policy(self, policy_id): raise exception.NotImplemented()
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