156 lines
5.7 KiB
Python
156 lines
5.7 KiB
Python
# Copyright 2010 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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"""
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Common Auth Middleware.
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"""
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import os
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from oslo.config import cfg
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import webob.dec
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import webob.exc
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from cinder.api.openstack import wsgi
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from cinder import context
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from cinder.openstack.common import jsonutils
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from cinder.openstack.common import log as logging
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from cinder import wsgi as base_wsgi
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use_forwarded_for_opt = cfg.BoolOpt(
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'use_forwarded_for',
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default=False,
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help='Treat X-Forwarded-For as the canonical remote address. '
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'Only enable this if you have a sanitizing proxy.')
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CONF = cfg.CONF
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CONF.register_opt(use_forwarded_for_opt)
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LOG = logging.getLogger(__name__)
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def pipeline_factory(loader, global_conf, **local_conf):
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"""A paste pipeline replica that keys off of auth_strategy."""
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pipeline = local_conf[CONF.auth_strategy]
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if not CONF.api_rate_limit:
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limit_name = CONF.auth_strategy + '_nolimit'
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pipeline = local_conf.get(limit_name, pipeline)
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pipeline = pipeline.split()
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filters = [loader.get_filter(n) for n in pipeline[:-1]]
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app = loader.get_app(pipeline[-1])
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filters.reverse()
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for filter in filters:
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app = filter(app)
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return app
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class InjectContext(base_wsgi.Middleware):
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"""Add a 'cinder.context' to WSGI environ."""
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def __init__(self, context, *args, **kwargs):
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self.context = context
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super(InjectContext, self).__init__(*args, **kwargs)
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@webob.dec.wsgify(RequestClass=base_wsgi.Request)
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def __call__(self, req):
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req.environ['cinder.context'] = self.context
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return self.application
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class CinderKeystoneContext(base_wsgi.Middleware):
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"""Make a request context from keystone headers."""
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@webob.dec.wsgify(RequestClass=base_wsgi.Request)
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def __call__(self, req):
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user_id = req.headers.get('X_USER')
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user_id = req.headers.get('X_USER_ID', user_id)
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if user_id is None:
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LOG.debug("Neither X_USER_ID nor X_USER found in request")
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return webob.exc.HTTPUnauthorized()
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# get the roles
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roles = [r.strip() for r in req.headers.get('X_ROLE', '').split(',')]
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if 'X_TENANT_ID' in req.headers:
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# This is the new header since Keystone went to ID/Name
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project_id = req.headers['X_TENANT_ID']
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else:
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# This is for legacy compatibility
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project_id = req.headers['X_TENANT']
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project_name = req.headers.get('X_TENANT_NAME')
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# Get the auth token
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auth_token = req.headers.get('X_AUTH_TOKEN',
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req.headers.get('X_STORAGE_TOKEN'))
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# Build a context, including the auth_token...
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remote_address = req.remote_addr
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service_catalog = None
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if req.headers.get('X_SERVICE_CATALOG') is not None:
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try:
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catalog_header = req.headers.get('X_SERVICE_CATALOG')
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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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if CONF.use_forwarded_for:
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remote_address = req.headers.get('X-Forwarded-For', remote_address)
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ctx = context.RequestContext(user_id,
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project_id,
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project_name=project_name,
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roles=roles,
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auth_token=auth_token,
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remote_address=remote_address,
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service_catalog=service_catalog)
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req.environ['cinder.context'] = ctx
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return self.application
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class NoAuthMiddleware(base_wsgi.Middleware):
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"""Return a fake token if one isn't specified."""
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@webob.dec.wsgify(RequestClass=wsgi.Request)
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def __call__(self, req):
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if 'X-Auth-Token' not in req.headers:
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user_id = req.headers.get('X-Auth-User', 'admin')
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project_id = req.headers.get('X-Auth-Project-Id', 'admin')
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os_url = os.path.join(req.url, project_id)
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res = webob.Response()
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# NOTE(vish): This is expecting and returning Auth(1.1), whereas
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# keystone uses 2.0 auth. We should probably allow
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# 2.0 auth here as well.
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res.headers['X-Auth-Token'] = '%s:%s' % (user_id, project_id)
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res.headers['X-Server-Management-Url'] = os_url
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res.content_type = 'text/plain'
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res.status = '204'
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return res
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token = req.headers['X-Auth-Token']
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user_id, _sep, project_id = token.partition(':')
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project_id = project_id or user_id
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remote_address = getattr(req, 'remote_address', '127.0.0.1')
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if CONF.use_forwarded_for:
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remote_address = req.headers.get('X-Forwarded-For', remote_address)
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ctx = context.RequestContext(user_id,
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project_id,
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is_admin=True,
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remote_address=remote_address)
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req.environ['cinder.context'] = ctx
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return self.application
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