79 lines
2.6 KiB
Python
79 lines
2.6 KiB
Python
# Copyright 2017 Ericsson AB.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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# Copyright (c) 2017 Wind River Systems, Inc.
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#
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# The right to copy, distribute, modify, or otherwise make use
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# of this software may be licensed only pursuant to the terms
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# of an applicable Wind River license agreement.
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#
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"""Policy enforcer for DC Manager."""
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from oslo_config import cfg
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from oslo_policy import policy
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from dcmanager.common import exceptions as exc
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_ENFORCER = None
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def enforce(action, context, target=None, do_raise=True,
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exc=exc.NotAuthorized):
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"""Verify that the action is valid on the target in this context.
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:param action: String, representing the action to be checked.
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This should be colon separated for clarity.
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i.e. ``sync:list``
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:param context: DC Manager context.
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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.
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e.g. ``{'project_id': context.project}``
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:param do_raise: if True (the default), raises specified exception.
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:param exc: Exception to be raised if not authorized. Default is
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dcmanager.common.exceptions.NotAuthorized.
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:return: returns True if authorized and False if not authorized and
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do_raise is False.
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"""
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if cfg.CONF.auth_strategy != 'keystone':
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# Policy enforcement is supported now only with Keystone
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# authentication.
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return
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target_obj = {
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'project_id': context.project,
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'user_id': context.user,
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}
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target_obj.update(target or {})
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_ensure_enforcer_initialization()
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try:
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_ENFORCER.enforce(action, target_obj, context.to_dict(),
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do_raise=do_raise, exc=exc)
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return True
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except Exception:
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return False
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def _ensure_enforcer_initialization():
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global _ENFORCER
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if not _ENFORCER:
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_ENFORCER = policy.Enforcer(cfg.CONF)
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_ENFORCER.load_rules()
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