/usr/lib/python2.7/dist-packages/manila/policy.py is in python-manila 1:2.0.0-0ubuntu1.
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 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 | # 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 Manila"""
import functools
from oslo_config import cfg
from oslo_policy import policy
from manila import exception
CONF = cfg.CONF
_ENFORCER = None
def reset():
global _ENFORCER
if _ENFORCER:
_ENFORCER.clear()
_ENFORCER = None
def init(policy_path=None):
global _ENFORCER
if not _ENFORCER:
_ENFORCER = policy.Enforcer(CONF)
if policy_path:
_ENFORCER.policy_path = policy_path
_ENFORCER.load_rules()
def enforce(context, action, target, do_raise=True):
"""Verifies that the action is valid on the target in this context.
:param context: manila 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 manila.exception.PolicyNotAuthorized: if verification fails.
"""
init()
if not isinstance(context, dict):
context = context.to_dict()
# Add the exception arguments if asked to do a raise
extra = {}
if do_raise:
extra.update(exc=exception.PolicyNotAuthorized, action=action,
do_raise=do_raise)
return _ENFORCER.enforce(action, target, context, **extra)
def check_is_admin(roles):
"""Whether or not roles contains 'admin' role according to policy setting.
"""
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': ''}
credentials = {'roles': roles}
return _ENFORCER.enforce("context_is_admin", target, credentials)
def wrap_check_policy(resource):
"""Check policy corresponding to the wrapped methods prior to execution."""
def check_policy_wraper(func):
@functools.wraps(func)
def wrapped(self, context, target_obj, *args, **kwargs):
check_policy(context, resource, func.__name__, target_obj)
return func(self, context, target_obj, *args, **kwargs)
return wrapped
return check_policy_wraper
def check_policy(context, resource, action, target_obj=None):
target = {
'project_id': context.project_id,
'user_id': context.user_id,
}
target.update(target_obj or {})
_action = '%s:%s' % (resource, action)
enforce(context, _action, target)
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