132 lines
4.4 KiB
Python
132 lines
4.4 KiB
Python
# Copyright 2011-2016 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 webob
|
|
|
|
from oslo_config import cfg
|
|
from oslo_context import context
|
|
from oslo_log import log as logging
|
|
from oslo_middleware import request_id
|
|
from oslo_serialization import jsonutils
|
|
|
|
from glare.common import policy
|
|
from glare.common import wsgi
|
|
from glare.i18n import _
|
|
|
|
context_opts = [
|
|
cfg.BoolOpt('allow_anonymous_access', default=False,
|
|
help=_('Allow unauthenticated users to access the API with '
|
|
'read-only privileges. This only applies when using '
|
|
'ContextMiddleware.'))
|
|
]
|
|
|
|
CONF = cfg.CONF
|
|
CONF.register_opts(context_opts)
|
|
|
|
|
|
LOG = logging.getLogger(__name__)
|
|
|
|
|
|
class RequestContext(context.RequestContext):
|
|
"""Stores information about the security context for Glare.
|
|
|
|
Stores how the user accesses the system, as well as additional request
|
|
information.
|
|
"""
|
|
|
|
def __init__(self, service_catalog=None, **kwargs):
|
|
super(RequestContext, self).__init__(**kwargs)
|
|
self.service_catalog = service_catalog
|
|
# check if user is admin using policy file
|
|
if kwargs.get('is_admin') is None:
|
|
self.is_admin = policy.check_is_admin(self)
|
|
|
|
def to_dict(self):
|
|
d = super(RequestContext, self).to_dict()
|
|
d.update({
|
|
'service_catalog': self.service_catalog,
|
|
})
|
|
return d
|
|
|
|
@classmethod
|
|
def from_dict(cls, values):
|
|
return cls(**values)
|
|
|
|
def to_policy_values(self):
|
|
values = super(RequestContext, self).to_policy_values()
|
|
values['is_admin'] = self.is_admin
|
|
values['read_only'] = self.read_only
|
|
return values
|
|
|
|
|
|
class ContextMiddleware(wsgi.Middleware):
|
|
|
|
def __init__(self, app):
|
|
super(ContextMiddleware, self).__init__(app)
|
|
|
|
def process_request(self, req):
|
|
"""Convert authentication information into a request context
|
|
|
|
Generate a RequestContext object from the available
|
|
authentication headers and store on the 'context' attribute
|
|
of the req object.
|
|
|
|
:param req: wsgi request object that will be given the context object
|
|
:raises: webob.exc.HTTPUnauthorized: when value of the
|
|
X-Identity-Status header is not
|
|
'Confirmed' and anonymous access
|
|
is disallowed
|
|
"""
|
|
if req.headers.get('X-Identity-Status') == 'Confirmed':
|
|
req.context = self._get_authenticated_context(req)
|
|
elif CONF.allow_anonymous_access:
|
|
req.context = self._get_anonymous_context()
|
|
else:
|
|
raise webob.exc.HTTPUnauthorized()
|
|
|
|
@staticmethod
|
|
def _get_anonymous_context():
|
|
"""Anonymous user has only Read-Only grants"""
|
|
return RequestContext(read_only=True, is_admin=False)
|
|
|
|
@staticmethod
|
|
def _get_authenticated_context(req):
|
|
headers = req.headers
|
|
service_catalog = None
|
|
if headers.get('X-Service-Catalog') is not None:
|
|
catalog_header = headers.get('X-Service-Catalog')
|
|
try:
|
|
service_catalog = jsonutils.loads(catalog_header)
|
|
except ValueError:
|
|
raise webob.exc.HTTPInternalServerError(
|
|
_('Invalid service catalog json.'))
|
|
kwargs = {
|
|
'service_catalog': service_catalog,
|
|
'request_id': req.environ.get(request_id.ENV_REQUEST_ID),
|
|
}
|
|
return RequestContext.from_environ(req.environ, **kwargs)
|
|
|
|
|
|
class UnauthenticatedContextMiddleware(wsgi.Middleware):
|
|
"""Process requests and responses when auth is turned off at all."""
|
|
|
|
def process_request(self, req):
|
|
"""Create a context without an authorized user.
|
|
|
|
When glare deployed as public repo everybody is admin
|
|
without any credentials.
|
|
"""
|
|
req.context = RequestContext(is_admin=True)
|