deb-ceilometer/ceilometer/api/rbac.py
gordon chung c34dcb6445 reset policy per test
reset global ENFORCER after every time to ensure test isolation

Change-Id: I752721cc8071a8f8a480d6a7110392517c6bae91
Closes-Bug: #1506151
2015-10-14 14:17:52 -04:00

108 lines
3.3 KiB
Python

#
# Copyright 2012 New Dream Network, LLC (DreamHost)
# Copyright 2014 Hewlett-Packard Company
#
# 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.
"""Access Control Lists (ACL's) control access the API server."""
from oslo_config import cfg
from oslo_policy import policy
import pecan
_ENFORCER = None
CONF = cfg.CONF
def reset():
global _ENFORCER
if _ENFORCER:
_ENFORCER.clear()
_ENFORCER = None
def _has_rule(name):
return name in _ENFORCER.rules.keys()
def enforce(policy_name, request):
"""Return the user and project the request should be limited to.
:param request: HTTP request
:param policy_name: the policy name to validate authz against.
"""
global _ENFORCER
if not _ENFORCER:
_ENFORCER = policy.Enforcer(CONF)
_ENFORCER.load_rules()
rule_method = "telemetry:" + policy_name
headers = request.headers
policy_dict = dict()
policy_dict['roles'] = headers.get('X-Roles', "").split(",")
policy_dict['target.user_id'] = (headers.get('X-User-Id'))
policy_dict['target.project_id'] = (headers.get('X-Project-Id'))
# maintain backward compat with Juno and previous by allowing the action if
# there is no rule defined for it
if ((_has_rule('default') or _has_rule(rule_method)) and
not _ENFORCER.enforce(rule_method, {}, policy_dict)):
pecan.core.abort(status_code=403, detail='RBAC Authorization Failed')
# TODO(fabiog): these methods are still used because the scoping part is really
# convoluted and difficult to separate out.
def get_limited_to(headers):
"""Return the user and project the request should be limited to.
:param headers: HTTP headers dictionary
:return: A tuple of (user, project), set to None if there's no limit on
one of these.
"""
global _ENFORCER
if not _ENFORCER:
_ENFORCER = policy.Enforcer(CONF)
_ENFORCER.load_rules()
policy_dict = dict()
policy_dict['roles'] = headers.get('X-Roles', "").split(",")
policy_dict['target.user_id'] = (headers.get('X-User-Id'))
policy_dict['target.project_id'] = (headers.get('X-Project-Id'))
# maintain backward compat with Juno and previous by using context_is_admin
# rule if the segregation rule (added in Kilo) is not defined
rule_name = 'segregation' if _has_rule(
'segregation') else 'context_is_admin'
if not _ENFORCER.enforce(rule_name,
{},
policy_dict):
return headers.get('X-User-Id'), headers.get('X-Project-Id')
return None, None
def get_limited_to_project(headers):
"""Return the project the request should be limited to.
:param headers: HTTP headers dictionary
:return: A project, or None if there's no limit on it.
"""
return get_limited_to(headers)[1]