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auth.py
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auth.py
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# Copyright (c) 2013 Red Hat, Inc.
#
# 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.
"""Middleware for handling authorization and authentication."""
from keystoneclient import auth
from keystonemiddleware import auth_token
from keystonemiddleware import opts
from oslo_log import log
STRATEGIES = {}
LOG = log.getLogger(__name__)
class SignedHeadersAuth(object):
def __init__(self, app, auth_app):
self._app = app
self._auth_app = auth_app
def __call__(self, environ, start_response):
path = environ.get('PATH_INFO')
signature = environ.get('HTTP_URL_SIGNATURE')
if signature is None or path.startswith('/v1'):
return self._auth_app(environ, start_response)
return self._app(environ, start_response)
class KeystoneAuth(object):
OPT_GROUP_NAME = 'keystone_authtoken'
@classmethod
def _register_opts(cls, conf):
"""Register keystonemiddleware options."""
options = []
keystone_opts = opts.list_auth_token_opts()
for n in keystone_opts:
if n[0] == cls.OPT_GROUP_NAME:
options = n[1]
break
if cls.OPT_GROUP_NAME not in conf:
conf.register_opts(options, group=cls.OPT_GROUP_NAME)
auth.register_conf_options(conf, cls.OPT_GROUP_NAME)
auth_token.CONF = conf
@classmethod
def install(cls, app, conf):
"""Install Auth check on application."""
LOG.debug(u'Installing Keystone\'s auth protocol')
cls._register_opts(conf)
conf = dict(conf.get(cls.OPT_GROUP_NAME))
return auth_token.AuthProtocol(app, conf=conf)
STRATEGIES['keystone'] = KeystoneAuth
def strategy(strategy):
"""Returns the Auth Strategy.
:param strategy: String representing
the strategy to use
"""
try:
return STRATEGIES[strategy]
except KeyError:
raise RuntimeError