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# -*- coding: utf-8 -*-
#
# Copyright (c) 2015 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.
import contextlib
import copy
import os
from oslo_policy import _checks
from oslo_policy._i18n import _
from oslo_serialization import jsonutils
import requests
class HttpCheck(_checks.Check):
"""Check ``http:`` rules by calling to a remote server.
This example implementation simply verifies that the response
is exactly ``True``.
"""
def __call__(self, target, creds, enforcer, current_rule=None):
url = ('http:' + self.match) % target
data, json = self._construct_payload(creds, current_rule,
enforcer, target)
with contextlib.closing(
requests.post(url, json=json, data=data)
) as r:
return r.text.lstrip('"').rstrip('"') == 'True'
@staticmethod
def _construct_payload(creds, current_rule, enforcer, target):
# Convert instances of object() in target temporarily to
# empty dict to avoid circular reference detection
# errors in jsonutils.dumps().
temp_target = copy.deepcopy(target)
for key in target.keys():
element = target.get(key)
if type(element) is object:
temp_target[key] = {}
data = json = None
if (enforcer.conf.oslo_policy.remote_content_type ==
'application/x-www-form-urlencoded'):
data = {'rule': jsonutils.dumps(current_rule),
'target': jsonutils.dumps(temp_target),
'credentials': jsonutils.dumps(creds)}
else:
json = {'rule': current_rule,
'target': temp_target,
'credentials': creds}
return data, json
class HttpsCheck(HttpCheck):
"""Check ``https:`` rules by calling to a remote server.
This example implementation simply verifies that the response
is exactly ``True``.
"""
def __call__(self, target, creds, enforcer, current_rule=None):
url = ('https:' + self.match) % target
cert_file = enforcer.conf.oslo_policy.remote_ssl_client_crt_file
key_file = enforcer.conf.oslo_policy.remote_ssl_client_key_file
ca_crt_file = enforcer.conf.oslo_policy.remote_ssl_ca_crt_file
verify_server = enforcer.conf.oslo_policy.remote_ssl_verify_server_crt
if cert_file:
if not os.path.exists(cert_file):
raise RuntimeError(
_("Unable to find ssl cert_file : %s") % cert_file)
if not os.access(cert_file, os.R_OK):
raise RuntimeError(
_("Unable to access ssl cert_file : %s") % cert_file)
if key_file:
if not os.path.exists(key_file):
raise RuntimeError(
_("Unable to find ssl key_file : %s") % key_file)
if not os.access(key_file, os.R_OK):
raise RuntimeError(
_("Unable to access ssl key_file : %s") % key_file)
cert = (cert_file, key_file)
if verify_server:
if ca_crt_file:
if not os.path.exists(ca_crt_file):
raise RuntimeError(
_("Unable to find ca cert_file : %s") % ca_crt_file)
verify_server = ca_crt_file
data, json = self._construct_payload(creds, current_rule,
enforcer, target)
with contextlib.closing(
requests.post(url, json=json,
data=data, cert=cert,
verify=verify_server)
) as r:
return r.text.lstrip('"').rstrip('"') == 'True'
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