114 lines
3.4 KiB
Python
114 lines
3.4 KiB
Python
# -*- coding: utf-8 -*-
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#
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# Copyright 2013 - Mirantis, Inc.
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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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"""Access Control API server."""
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from keystonemiddleware import auth_token
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from oslo_config import cfg
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from oslo_policy import policy
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from mistral import exceptions as exc
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_ENFORCER = None
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def setup(app):
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if cfg.CONF.pecan.auth_enable and cfg.CONF.auth_type == 'keystone':
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conf = dict(cfg.CONF.keystone_authtoken)
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# Change auth decisions of requests to the app itself.
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conf.update({'delay_auth_decision': True})
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# NOTE(rakhmerov): Policy enforcement works only if Keystone
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# authentication is enabled. No support for other authentication
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# types at this point.
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_ensure_enforcer_initialization()
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return auth_token.AuthProtocol(app, conf)
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else:
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return app
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def enforce(action, context, target=None, do_raise=True,
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exc=exc.NotAllowedException):
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"""Verifies 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. ``workflows:create``
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:param context: Mistral 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_id}``
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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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mistral.exceptions.NotAllowedException.
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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_type != '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_id,
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'user_id': context.user_id,
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}
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target_obj.update(target or {})
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_ensure_enforcer_initialization()
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return _ENFORCER.enforce(
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action,
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target_obj,
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context.to_dict(),
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do_raise=do_raise,
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exc=exc
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)
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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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def get_limited_to(headers):
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"""Return the user and project the request should be limited to.
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:param headers: HTTP headers dictionary
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:return: A tuple of (user, project), set to None if there's no limit on
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one of these.
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"""
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return headers.get('X-User-Id'), headers.get('X-Project-Id')
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def get_limited_to_project(headers):
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"""Return the project the request should be limited to.
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:param headers: HTTP headers dictionary
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:return: A project, or None if there's no limit on it.
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"""
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return get_limited_to(headers)[1]
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