152 lines
5.7 KiB
Python
152 lines
5.7 KiB
Python
# Copyright 2011-2012 OpenStack LLC.
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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.exc
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from barbican.api import middleware as mw
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from barbican.common import config
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from barbican.common import utils
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import barbican.context
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from barbican import i18n as u
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LOG = utils.getLogger(__name__)
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CONF = config.CONF
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class BaseContextMiddleware(mw.Middleware):
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def process_request(self, req):
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request_id = req.headers.get('x-openstack-request-id')
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if not request_id:
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request_id = b'req-' + utils.generate_uuid().encode('ascii')
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setattr(req, 'request_id', request_id)
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def process_response(self, resp):
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resp.headers['x-openstack-request-id'] = resp.request.request_id
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LOG.info(u._LI('Processed request: %(status)s - %(method)s %(url)s'),
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{"status": resp.status,
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"method": resp.request.method,
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"url": resp.request.url})
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return resp
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class ContextMiddleware(BaseContextMiddleware):
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def __init__(self, app):
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super(ContextMiddleware, self).__init__(app)
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def process_request(self, req):
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"""Convert authentication information into a request context
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Generate a barbican.context.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 X-Identity-Status
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header is not 'Confirmed' and
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anonymous access is disallowed
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"""
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super(ContextMiddleware, self).process_request(req)
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if req.headers.get('X-Identity-Status') == 'Confirmed':
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req.context = self._get_authenticated_context(req)
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elif CONF.allow_anonymous_access:
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req.context = self._get_anonymous_context()
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LOG.debug("==== Inserted barbican unauth "
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"request context: %s ====", req.context.to_dict())
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else:
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raise webob.exc.HTTPUnauthorized()
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# Ensure that down wind mw.Middleware/app can see this context.
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req.environ['barbican.context'] = req.context
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def _get_anonymous_context(self):
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kwargs = {
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'user': None,
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'tenant': None,
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'is_admin': False,
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'read_only': True,
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}
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return barbican.context.RequestContext(**kwargs)
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def _get_authenticated_context(self, req):
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# NOTE(bcwaldon): X-Roles is a csv string, but we need to parse
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# it into a list to be useful
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roles_header = req.headers.get('X-Roles', '')
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roles = [r.strip().lower() for r in roles_header.split(',')]
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# NOTE(bcwaldon): This header is deprecated in favor of X-Auth-Token
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# NOTE(mkbhanda): keeping this just-in-case for swift
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deprecated_token = req.headers.get('X-Storage-Token')
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kwargs = {
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'auth_token': req.headers.get('X-Auth-Token', deprecated_token),
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'user': req.headers.get('X-User-Id'),
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'project': req.headers.get('X-Project-Id'),
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'roles': roles,
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'is_admin': CONF.admin_role.strip().lower() in roles,
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'request_id': req.request_id
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}
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if req.headers.get('X-Domain-Id'):
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kwargs['domain'] = req.headers['X-Domain-Id']
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if req.headers.get('X-User-Domain-Id'):
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kwargs['user_domain'] = req.headers['X-User-Domain-Id']
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if req.headers.get('X-Project-Domain-Id'):
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kwargs['project_domain'] = req.headers['X-Project-Domain-Id']
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return barbican.context.RequestContext(**kwargs)
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class UnauthenticatedContextMiddleware(BaseContextMiddleware):
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def _get_project_id_from_header(self, req):
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project_id = req.headers.get('X-Project-Id')
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if not project_id:
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accept_header = req.headers.get('Accept')
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if not accept_header:
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req.headers['Accept'] = 'text/plain'
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raise webob.exc.HTTPBadRequest(detail=u._('Missing X-Project-Id'))
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return project_id
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def process_request(self, req):
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"""Create a context without an authorized user."""
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super(UnauthenticatedContextMiddleware, self).process_request(req)
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project_id = self._get_project_id_from_header(req)
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config_admin_role = CONF.admin_role.strip().lower()
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roles_header = req.headers.get('X-Roles', '')
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roles = [r.strip().lower() for r in roles_header.split(',') if r]
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# If a role wasn't specified we default to admin
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if not roles:
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roles = [config_admin_role]
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kwargs = {
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'user': req.headers.get('X-User-Id'),
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'domain': req.headers.get('X-Domain-Id'),
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'user_domain': req.headers.get('X-User-Domain-Id'),
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'project_domain': req.headers.get('X-Project-Domain-Id'),
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'project': project_id,
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'roles': roles,
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'is_admin': config_admin_role in roles,
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'request_id': req.request_id
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}
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context = barbican.context.RequestContext(**kwargs)
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req.environ['barbican.context'] = context
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