135 lines
4.9 KiB
Python
135 lines
4.9 KiB
Python
# Copyright 2017 AT&T Intellectual Property. All other rights reserved.
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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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import falcon
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import functools
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import oslo_policy.policy as op
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from oslo_config import cfg
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from promenade import exceptions as ex
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from promenade import logging
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LOG = logging.getLogger(__name__)
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policy_engine = None
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POLICIES = [
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op.RuleDefault(
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'admin_required',
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'role:admin or is_admin:1',
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description='Actions requiring admin authority'),
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op.DocumentedRuleDefault('kubernetes_provisioner:get_join_scripts',
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'role:admin', 'Get join script for node',
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[{
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'path': '/api/v1.0/join-scripts',
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'method': 'GET'
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}]),
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op.DocumentedRuleDefault('kubernetes_provisioner:post_validatedesign',
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'role:admin', 'Validate documents',
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[{
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'path': '/api/v1.0/validatedesign',
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'method': 'POST'
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}]),
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op.DocumentedRuleDefault('kubernetes_provisioner:update_node_labels',
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'role:admin', 'Update Node Labels',
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[{
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'path': '/api/v1.0/node-labels/{node_name}',
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'method': 'PUT'
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}]),
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]
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class PromenadePolicy:
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def __init__(self):
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self.enforcer = op.Enforcer(cfg.CONF)
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def register_policy(self):
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self.enforcer.register_defaults(POLICIES)
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self.enforcer.load_rules()
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def authorize(self, action, ctx):
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target = {'project_id': ctx.project_id, 'user_id': ctx.user_id}
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return self.enforcer.authorize(action, target, ctx.to_policy_view())
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class ApiEnforcer(object):
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"""
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A decorator class for enforcing RBAC policies
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"""
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def __init__(self, action):
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self.action = action
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def __call__(self, f):
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@functools.wraps(f)
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def secure_handler(slf, req, resp, *args, **kwargs):
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ctx = req.context
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policy_eng = ctx.policy_engine
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# policy engine must be configured
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if policy_eng is not None:
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LOG.debug(
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'Enforcing policy %s on request %s using engine %s',
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self.action,
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ctx.request_id,
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policy_eng.__class__.__name__,
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ctx=ctx)
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else:
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LOG.error('No policy engine configured', ctx=ctx)
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raise ex.PromenadeException(
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title="Auth is not being handled by any policy engine",
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status=falcon.HTTP_500,
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retry=False)
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authorized = False
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try:
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if policy_eng.authorize(self.action, ctx):
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LOG.debug('Request is authorized', ctx=ctx)
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authorized = True
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except Exception:
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LOG.exception(
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'Error authorizing request for action %s',
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self.action,
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ctx=ctx)
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raise ex.ApiError(
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title="Expectation Failed",
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status=falcon.HTTP_417,
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retry=False)
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if authorized:
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return f(slf, req, resp, *args, **kwargs)
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else:
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# raise the appropriate response exeception
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if ctx.authenticated:
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LOG.error(
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'Unauthorized access attempted for action %s',
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self.action,
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ctx=ctx)
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raise ex.ApiError(
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title="Forbidden",
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status=falcon.HTTP_403,
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description="Credentials do not permit access",
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retry=False)
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else:
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LOG.error(
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'Unathenticated access attempted for action %s',
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self.action,
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ctx=ctx)
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raise ex.ApiError(
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title="Unauthenticated",
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status=falcon.HTTP_401,
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description="Credentials are not established",
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retry=False)
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return secure_handler
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