136 lines
4.8 KiB
Python
136 lines
4.8 KiB
Python
# Copyright 2011-2016 OpenStack Foundation
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# 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, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import webob
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from oslo_config import cfg
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from oslo_context import context
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from oslo_middleware import base as base_middleware
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from oslo_middleware import request_id
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from oslo_serialization import jsonutils
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from glare.common import exception
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from glare.common import policy
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from glare.i18n import _
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context_opts = [
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cfg.BoolOpt('allow_anonymous_access', default=False,
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help=_('Allow unauthenticated users to access the API with '
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'read-only privileges. This only applies when using '
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'ContextMiddleware.'))
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]
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CONF = cfg.CONF
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CONF.register_opts(context_opts)
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class RequestContext(context.RequestContext):
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"""Stores information about the security context for Glare.
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Stores how the user accesses the system, as well as additional request
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information.
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"""
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def __init__(self, service_catalog=None, **kwargs):
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super(RequestContext, self).__init__(**kwargs)
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self.service_catalog = service_catalog
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# check if user is admin using policy file
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if kwargs.get('is_admin') is None:
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self.is_admin = policy.check_is_admin(self)
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def to_dict(self):
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d = super(RequestContext, self).to_dict()
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d.update({
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'service_catalog': self.service_catalog,
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})
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return d
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def to_policy_values(self):
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values = super(RequestContext, self).to_policy_values()
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values['is_admin'] = self.is_admin
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values['read_only'] = self.read_only
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return values
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class ContextMiddleware(base_middleware.ConfigurableMiddleware):
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@staticmethod
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def process_request(req):
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"""Convert authentication information into a request context.
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Generate a RequestContext object from the available
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authentication headers and store on the 'context' attribute
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of the req object.
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:param req: wsgi request object that will be given the context object
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:raises: webob.exc.HTTPUnauthorized: when value of the
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X-Identity-Status header is not
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'Confirmed' and anonymous access
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is disallowed
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"""
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if req.headers.get('X-Identity-Status') == 'Confirmed':
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req.context = ContextMiddleware._get_authenticated_context(req)
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elif CONF.allow_anonymous_access:
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req.context = RequestContext(read_only=True, is_admin=False)
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else:
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raise exception.Unauthorized()
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@staticmethod
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def _get_authenticated_context(req):
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headers = req.headers
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service_catalog = None
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if headers.get('X-Service-Catalog') is not None:
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catalog_header = headers.get('X-Service-Catalog')
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try:
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service_catalog = jsonutils.loads(catalog_header)
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except ValueError:
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raise webob.exc.HTTPInternalServerError(
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_('Invalid service catalog json.'))
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kwargs = {
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'service_catalog': service_catalog,
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'request_id': req.environ.get(request_id.ENV_REQUEST_ID),
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}
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return RequestContext.from_environ(req.environ, **kwargs)
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class TrustedAuthMiddleware(base_middleware.ConfigurableMiddleware):
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@staticmethod
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def process_request(req):
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auth_token = req.headers.get('X-Auth-Token')
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if not auth_token:
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msg = _("Auth token must be provided")
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raise exception.Unauthorized(msg)
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try:
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user, tenant, roles = auth_token.split(':')
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except ValueError:
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msg = _("Wrong auth token format. It must be 'user:tenant:roles'")
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raise exception.Unauthorized(msg)
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if tenant.lower() == 'none':
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tenant = None
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req.headers['X-User-Id'] = user
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req.headers['X-Tenant-Id'] = tenant
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req.headers['X-Roles'] = roles.split(',')
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req.headers['X-Identity-Status'] = 'Confirmed'
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kwargs = {
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'user': user,
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'tenant': tenant,
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'roles': roles,
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'is_admin': 'admin' in req.headers['X-Roles'],
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'auth_token': auth_token,
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}
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req.context = context.RequestContext(**kwargs)
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