119 lines
4.1 KiB
Python
119 lines
4.1 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright 2012 OpenStack LLC
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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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# Copyright (c) 2010-2011 OpenStack, LLC.
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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
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# 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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"""
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NOVA LAZY PROVISIONING AUTH MIDDLEWARE
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This WSGI component allows keystone act as an identity service for nova by
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lazy provisioning nova projects/users as authenticated by auth_token.
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Use by applying after auth_token in the nova paste config.
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Example: docs/nova-api-paste.ini
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"""
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from nova import auth
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from nova import context
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from nova import flags
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from nova import utils
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from nova import wsgi
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from nova import exception
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import webob.dec
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import webob.exc
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FLAGS = flags.FLAGS
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class KeystoneAuthShim(wsgi.Middleware):
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"""Lazy provisioning nova project/users from keystone tenant/user"""
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def __init__(self, application, db_driver=None):
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if not db_driver:
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db_driver = FLAGS.db_driver
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self.db = utils.import_object(db_driver)
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self.auth = auth.manager.AuthManager()
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super(KeystoneAuthShim, self).__init__(application)
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@webob.dec.wsgify(RequestClass=wsgi.Request)
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def __call__(self, req):
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# find or create user
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try:
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user_id = req.headers['X_USER']
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except:
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return webob.exc.HTTPUnauthorized()
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try:
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user_ref = self.auth.get_user(user_id)
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except:
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user_ref = self.auth.create_user(user_id)
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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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# set user admin-ness to keystone admin-ness
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# FIXME: keystone-admin-role value from keystone.conf is not
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# used neither here nor in glance_auth_token!
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roles = [r.strip() for r in req.headers.get('X_ROLE', '').split(',')]
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is_admin = 'Admin' in roles
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if user_ref.is_admin() != is_admin:
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self.auth.modify_user(user_ref, admin=is_admin)
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# create a project for tenant
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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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if project_id:
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try:
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project_ref = self.auth.get_project(project_id)
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except:
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project_ref = self.auth.create_project(project_id, user_id)
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# ensure user is a member of project
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if not self.auth.is_project_member(user_id, project_id):
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self.auth.add_to_project(user_id, project_id)
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else:
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project_ref = None
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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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ctx = context.RequestContext(user_id, project_id,
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is_admin=('Admin' in roles),
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auth_token=auth_token)
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req.environ['nova.context'] = ctx
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return self.application
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