/usr/lib/python2.7/dist-packages/cinder/policy.py is in python-cinder 2:8.0.0-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 | # Copyright (c) 2011 OpenStack Foundation
# 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 Cinder"""
from oslo_config import cfg
from oslo_policy import opts as policy_opts
from oslo_policy import policy
from cinder import exception
CONF = cfg.CONF
policy_opts.set_defaults(cfg.CONF, 'policy.json')
_ENFORCER = None
def init():
global _ENFORCER
if not _ENFORCER:
_ENFORCER = policy.Enforcer(CONF)
def enforce_action(context, action):
"""Checks that the action can be done by the given context.
Applies a check to ensure the context's project_id and user_id can be
applied to the given action using the policy enforcement api.
"""
return enforce(context, action, {'project_id': context.project_id,
'user_id': context.user_id})
def enforce(context, action, target):
"""Verifies that the action is valid on the target in this context.
:param context: cinder context
:param action: string representing the action to be checked
this should be colon separated for clarity.
i.e. ``compute:create_instance``,
``compute:attach_volume``,
``volume:attach_volume``
:param object: 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': context.project_id}``
:raises PolicyNotAuthorized: if verification fails.
"""
init()
return _ENFORCER.enforce(action, target, context.to_dict(),
do_raise=True,
exc=exception.PolicyNotAuthorized,
action=action)
def check_is_admin(roles, context=None):
"""Whether or not user is admin according to policy setting.
Can use roles or user_id from context to determine if user is admin.
In a multi-domain configuration, roles alone may not be sufficient.
"""
init()
# include project_id on target to avoid KeyError if context_is_admin
# policy definition is missing, and default admin_or_owner rule
# attempts to apply. Since our credentials dict does not include a
# project_id, this target can never match as a generic rule.
target = {'project_id': ''}
if context is None:
credentials = {'roles': roles}
else:
credentials = {'roles': context.roles,
'user_id': context.user_id
}
return _ENFORCER.enforce('context_is_admin', target, credentials)
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