102 lines
3.8 KiB
Python
102 lines
3.8 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
|
|
|
|
# Copyright 2013 OpenStack Foundation
|
|
#
|
|
# 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.
|
|
|
|
from keystoneclient import exceptions as keystone_exceptions
|
|
from keystoneclient.v2_0 import client as keystone_client
|
|
from webob.exc import HTTPUnauthorized
|
|
|
|
|
|
class KeystonePasswordAuthProtocol(object):
|
|
"""
|
|
Alternative authentication middleware that uses username and password
|
|
to authenticate against Keystone instead of validating existing auth token.
|
|
The benefit being that you no longer require admin/service token to
|
|
authenticate users.
|
|
"""
|
|
|
|
def __init__(self, app, conf):
|
|
self.app = app
|
|
self.conf = conf
|
|
|
|
def __call__(self, env, start_response):
|
|
"""Authenticate incoming request."""
|
|
username = env.get('HTTP_X_AUTH_USER')
|
|
password = env.get('HTTP_X_AUTH_KEY')
|
|
# Determine tenant id from path.
|
|
tenant = env.get('PATH_INFO').split('/')[1]
|
|
auth_url = env.get('HTTP_X_AUTH_URL')
|
|
if not tenant:
|
|
return self._reject_request(env, start_response, auth_url)
|
|
try:
|
|
client = keystone_client.Client(
|
|
username=username, password=password, tenant_id=tenant,
|
|
auth_url=auth_url)
|
|
except (keystone_exceptions.Unauthorized,
|
|
keystone_exceptions.Forbidden,
|
|
keystone_exceptions.NotFound,
|
|
keystone_exceptions.AuthorizationFailure):
|
|
return self._reject_request(env, start_response, auth_url)
|
|
env['keystone.token_info'] = client.auth_ref
|
|
env.update(self._build_user_headers(client.auth_ref))
|
|
return self.app(env, start_response)
|
|
|
|
def _reject_request(self, env, start_response, auth_url):
|
|
"""Redirect client to auth server."""
|
|
headers = [('WWW-Authenticate', 'Keystone uri=\'%s\'' % auth_url)]
|
|
resp = HTTPUnauthorized('Authentication required', headers)
|
|
return resp(env, start_response)
|
|
|
|
def _build_user_headers(self, token_info):
|
|
"""Build headers that represent authenticated user from auth token."""
|
|
tenant_id = token_info['token']['tenant']['id']
|
|
tenant_name = token_info['token']['tenant']['name']
|
|
user_id = token_info['user']['id']
|
|
user_name = token_info['user']['name']
|
|
roles = ','.join(
|
|
[role['name'] for role in token_info['user']['roles']])
|
|
service_catalog = token_info['serviceCatalog']
|
|
auth_token = token_info['token']['id']
|
|
|
|
headers = {
|
|
'HTTP_X_IDENTITY_STATUS': 'Confirmed',
|
|
'HTTP_X_PROJECT_ID': tenant_id,
|
|
'HTTP_X_PROJECT_NAME': tenant_name,
|
|
'HTTP_X_USER_ID': user_id,
|
|
'HTTP_X_USER_NAME': user_name,
|
|
'HTTP_X_ROLES': roles,
|
|
'HTTP_X_SERVICE_CATALOG': service_catalog,
|
|
'HTTP_X_AUTH_TOKEN': auth_token,
|
|
# DEPRECATED
|
|
'HTTP_X_USER': user_name,
|
|
'HTTP_X_TENANT_ID': tenant_id,
|
|
'HTTP_X_TENANT_NAME': tenant_name,
|
|
'HTTP_X_TENANT': tenant_name,
|
|
'HTTP_X_ROLE': roles,
|
|
}
|
|
|
|
return headers
|
|
|
|
|
|
def filter_factory(global_conf, **local_conf):
|
|
"""Returns a WSGI filter app for use with paste.deploy."""
|
|
conf = global_conf.copy()
|
|
conf.update(local_conf)
|
|
|
|
def auth_filter(app):
|
|
return KeystonePasswordAuthProtocol(app, conf)
|
|
return auth_filter
|