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# vim: tabstop=4 shiftwidth=4 softtabstop=4
# Copyright 2012 OpenStack LLC
# 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
# 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.
"""Main entry point into the S3 Credentials service.
import base64
import hmac
from hashlib import sha1
from keystone import config
from keystone.common import wsgi
from keystone.contrib import ec2
CONF = config.CONF
class S3Extension(wsgi.ExtensionRouter):
def add_routes(self, mapper):
controller = S3Controller()
# validation
class S3Controller(ec2.Ec2Controller):
def check_signature(self, creds_ref, credentials):
msg = base64.urlsafe_b64decode(str(credentials['token']))
key = str(creds_ref['secret'])
signed = base64.encodestring(, msg, sha1).digest()).strip()
if credentials['signature'] != signed:
raise Exception('Not Authorized')