777 lines
34 KiB
Python
777 lines
34 KiB
Python
# Copyright (c) 2011-2014 OpenStack Foundation
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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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from __future__ import print_function
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from time import time
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from traceback import format_exc
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from urllib import unquote
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from uuid import uuid4
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from hashlib import sha1
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import hmac
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import base64
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from eventlet import Timeout
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from swift.common.swob import Response, Request
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from swift.common.swob import HTTPBadRequest, HTTPForbidden, HTTPNotFound, \
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HTTPUnauthorized
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from swift.common.request_helpers import get_sys_meta_prefix
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from swift.common.middleware.acl import (
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clean_acl, parse_acl, referrer_allowed, acls_from_account_info)
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from swift.common.utils import cache_from_env, get_logger, \
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split_path, config_true_value, register_swift_info
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from swift.common.utils import config_read_reseller_options
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from swift.proxy.controllers.base import get_account_info
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class TempAuth(object):
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"""
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Test authentication and authorization system.
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Add to your pipeline in proxy-server.conf, such as::
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[pipeline:main]
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pipeline = catch_errors cache tempauth proxy-server
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Set account auto creation to true in proxy-server.conf::
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[app:proxy-server]
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account_autocreate = true
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And add a tempauth filter section, such as::
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[filter:tempauth]
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use = egg:swift#tempauth
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user_admin_admin = admin .admin .reseller_admin
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user_test_tester = testing .admin
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user_test2_tester2 = testing2 .admin
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user_test_tester3 = testing3
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# To allow accounts/users with underscores you can base64 encode them.
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# Here is the account "under_score" and username "a_b" (note the lack
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# of padding equal signs):
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user64_dW5kZXJfc2NvcmU_YV9i = testing4
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See the proxy-server.conf-sample for more information.
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Multiple Reseller Prefix Items:
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The reseller prefix specifies which parts of the account namespace this
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middleware is responsible for managing authentication and authorization.
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By default, the prefix is AUTH so accounts and tokens are prefixed
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by AUTH_. When a request's token and/or path start with AUTH_, this
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middleware knows it is responsible.
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We allow the reseller prefix to be a list. In tempauth, the first item
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in the list is used as the prefix for tokens and user groups. The
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other prefixes provide alternate accounts that user's can access. For
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example if the reseller prefix list is 'AUTH, OTHER', a user with
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admin access to AUTH_account also has admin access to
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OTHER_account.
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Required Group:
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The group .admin is normally needed to access an account (ACLs provide
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an additional way to access an account). You can specify the
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``require_group`` parameter. This means that you also need the named group
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to access an account. If you have several reseller prefix items, prefix
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the ``require_group`` parameter with the appropriate prefix.
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X-Service-Token:
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If an X-Service-Token is presented in the request headers, the groups
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derived from the token are appended to the roles derived form
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X-Auth-Token. If X-Auth-Token is missing or invalid, X-Service-Token
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is not processed.
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The X-Service-Token is useful when combined with multiple reseller prefix
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items. In the following configuration, accounts prefixed SERVICE_
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are only accessible if X-Auth-Token is form the end-user and
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X-Service-Token is from the ``glance`` user::
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[filter:tempauth]
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use = egg:swift#tempauth
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reseller_prefix = AUTH, SERVICE
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SERVICE_require_group = .service
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user_admin_admin = admin .admin .reseller_admin
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user_joeacct_joe = joepw .admin
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user_maryacct_mary = marypw .admin
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user_glance_glance = glancepw .service
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The name .service is an example. Unlike .admin and .reseller_admin
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it is not a reserved name.
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Account ACLs:
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If a swift_owner issues a POST or PUT to the account, with the
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X-Account-Access-Control header set in the request, then this may
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allow certain types of access for additional users.
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* Read-Only: Users with read-only access can list containers in the
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account, list objects in any container, retrieve objects, and view
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unprivileged account/container/object metadata.
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* Read-Write: Users with read-write access can (in addition to the
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read-only privileges) create objects, overwrite existing objects,
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create new containers, and set unprivileged container/object
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metadata.
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* Admin: Users with admin access are swift_owners and can perform
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any action, including viewing/setting privileged metadata (e.g.
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changing account ACLs).
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To generate headers for setting an account ACL::
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from swift.common.middleware.acl import format_acl
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acl_data = { 'admin': ['alice'], 'read-write': ['bob', 'carol'] }
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header_value = format_acl(version=2, acl_dict=acl_data)
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To generate a curl command line from the above::
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token=...
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storage_url=...
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python -c '
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from swift.common.middleware.acl import format_acl
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acl_data = { 'admin': ['alice'], 'read-write': ['bob', 'carol'] }
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headers = {'X-Account-Access-Control':
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format_acl(version=2, acl_dict=acl_data)}
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header_str = ' '.join(["-H '%s: %s'" % (k, v)
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for k, v in headers.items()])
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print ('curl -D- -X POST -H "x-auth-token: $token" %s '
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'$storage_url' % header_str)
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'
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:param app: The next WSGI app in the pipeline
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:param conf: The dict of configuration values from the Paste config file
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"""
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def __init__(self, app, conf):
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self.app = app
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self.conf = conf
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self.logger = get_logger(conf, log_route='tempauth')
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self.log_headers = config_true_value(conf.get('log_headers', 'f'))
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self.reseller_prefixes, self.account_rules = \
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config_read_reseller_options(conf, dict(require_group=''))
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self.reseller_prefix = self.reseller_prefixes[0]
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self.logger.set_statsd_prefix('tempauth.%s' % (
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self.reseller_prefix if self.reseller_prefix else 'NONE',))
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self.auth_prefix = conf.get('auth_prefix', '/auth/')
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if not self.auth_prefix or not self.auth_prefix.strip('/'):
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self.logger.warning('Rewriting invalid auth prefix "%s" to '
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'"/auth/" (Non-empty auth prefix path '
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'is required)' % self.auth_prefix)
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self.auth_prefix = '/auth/'
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if self.auth_prefix[0] != '/':
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self.auth_prefix = '/' + self.auth_prefix
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if self.auth_prefix[-1] != '/':
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self.auth_prefix += '/'
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self.token_life = int(conf.get('token_life', 86400))
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self.allow_overrides = config_true_value(
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conf.get('allow_overrides', 't'))
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self.storage_url_scheme = conf.get('storage_url_scheme', 'default')
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self.users = {}
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for conf_key in conf:
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if conf_key.startswith('user_') or conf_key.startswith('user64_'):
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account, username = conf_key.split('_', 1)[1].split('_')
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if conf_key.startswith('user64_'):
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# Because trailing equal signs would screw up config file
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# parsing, we auto-pad with '=' chars.
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account += '=' * (len(account) % 4)
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account = base64.b64decode(account)
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username += '=' * (len(username) % 4)
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username = base64.b64decode(username)
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values = conf[conf_key].split()
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if not values:
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raise ValueError('%s has no key set' % conf_key)
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key = values.pop(0)
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if values and ('://' in values[-1] or '$HOST' in values[-1]):
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url = values.pop()
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else:
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url = '$HOST/v1/%s%s' % (self.reseller_prefix, account)
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self.users[account + ':' + username] = {
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'key': key, 'url': url, 'groups': values}
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def __call__(self, env, start_response):
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"""
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Accepts a standard WSGI application call, authenticating the request
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and installing callback hooks for authorization and ACL header
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validation. For an authenticated request, REMOTE_USER will be set to a
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comma separated list of the user's groups.
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With a non-empty reseller prefix, acts as the definitive auth service
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for just tokens and accounts that begin with that prefix, but will deny
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requests outside this prefix if no other auth middleware overrides it.
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With an empty reseller prefix, acts as the definitive auth service only
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for tokens that validate to a non-empty set of groups. For all other
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requests, acts as the fallback auth service when no other auth
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middleware overrides it.
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Alternatively, if the request matches the self.auth_prefix, the request
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will be routed through the internal auth request handler (self.handle).
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This is to handle granting tokens, etc.
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"""
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if self.allow_overrides and env.get('swift.authorize_override', False):
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return self.app(env, start_response)
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if env.get('PATH_INFO', '').startswith(self.auth_prefix):
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return self.handle(env, start_response)
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s3 = env.get('HTTP_AUTHORIZATION')
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token = env.get('HTTP_X_AUTH_TOKEN', env.get('HTTP_X_STORAGE_TOKEN'))
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service_token = env.get('HTTP_X_SERVICE_TOKEN')
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if s3 or (token and token.startswith(self.reseller_prefix)):
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# Note: Empty reseller_prefix will match all tokens.
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groups = self.get_groups(env, token)
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if service_token:
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service_groups = self.get_groups(env, service_token)
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if groups and service_groups:
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groups += ',' + service_groups
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if groups:
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user = groups and groups.split(',', 1)[0] or ''
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trans_id = env.get('swift.trans_id')
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self.logger.debug('User: %s uses token %s (trans_id %s)' %
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(user, 's3' if s3 else token, trans_id))
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env['REMOTE_USER'] = groups
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env['swift.authorize'] = self.authorize
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env['swift.clean_acl'] = clean_acl
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if '.reseller_admin' in groups:
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env['reseller_request'] = True
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else:
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# Unauthorized token
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if self.reseller_prefix and not s3:
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# Because I know I'm the definitive auth for this token, I
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# can deny it outright.
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self.logger.increment('unauthorized')
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try:
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vrs, realm, rest = split_path(env['PATH_INFO'],
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2, 3, True)
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except ValueError:
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realm = 'unknown'
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return HTTPUnauthorized(headers={
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'Www-Authenticate': 'Swift realm="%s"' % realm})(
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env, start_response)
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# Because I'm not certain if I'm the definitive auth for empty
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# reseller_prefixed tokens, I won't overwrite swift.authorize.
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elif 'swift.authorize' not in env:
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env['swift.authorize'] = self.denied_response
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else:
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if self._is_definitive_auth(env.get('PATH_INFO', '')):
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# Handle anonymous access to accounts I'm the definitive
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# auth for.
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env['swift.authorize'] = self.authorize
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env['swift.clean_acl'] = clean_acl
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elif self.reseller_prefix == '':
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# Because I'm not certain if I'm the definitive auth, I won't
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# overwrite swift.authorize.
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if 'swift.authorize' not in env:
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env['swift.authorize'] = self.authorize
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env['swift.clean_acl'] = clean_acl
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else:
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# Not my token, not my account, I can't authorize this request,
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# deny all is a good idea if not already set...
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if 'swift.authorize' not in env:
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env['swift.authorize'] = self.denied_response
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return self.app(env, start_response)
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def _is_definitive_auth(self, path):
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"""
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Determine if we are the definitive auth
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Determines if we are the definitive auth for a given path.
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If the account name is prefixed with something matching one
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of the reseller_prefix items, then we are the auth (return True)
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Non-matching: we are not the auth.
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However, one of the reseller_prefix items can be blank. If
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so, we cannot always be definite so return False.
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:param path: A path (e.g., /v1/AUTH_joesaccount/c/o)
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:return:True if we are definitive auth
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"""
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try:
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version, account, rest = split_path(path, 1, 3, True)
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except ValueError:
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return False
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if account:
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return bool(self._get_account_prefix(account))
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return False
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def _non_empty_reseller_prefixes(self):
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return iter([pre for pre in self.reseller_prefixes if pre != ''])
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def _get_account_prefix(self, account):
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"""
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Get the prefix of an account
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Determines which reseller prefix matches the account and returns
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that prefix. If account does not start with one of the known
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reseller prefixes, returns None.
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:param account: Account name (e.g., AUTH_joesaccount) or None
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:return: The prefix string (examples: 'AUTH_', 'SERVICE_', '')
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If we can't match the prefix of the account, return None
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"""
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if account is None:
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return None
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# Empty prefix matches everything, so try to match others first
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for prefix in self._non_empty_reseller_prefixes():
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if account.startswith(prefix):
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return prefix
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if '' in self.reseller_prefixes:
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return ''
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return None
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def _dot_account(self, account):
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"""
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Detect if account starts with dot character after the prefix
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:param account: account in path (e.g., AUTH_joesaccount)
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:return:True if name starts with dot character
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"""
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prefix = self._get_account_prefix(account)
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return prefix is not None and account[len(prefix)] == '.'
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def _get_user_groups(self, account, account_user, account_id):
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"""
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:param account: example: test
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:param account_user: example: test:tester
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:param account_id: example: AUTH_test
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:return: a comma separated string of group names. The group names are
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as follows: account,account_user,groups...
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If .admin is in the groups, this is replaced by all the
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possible account ids. For example, for user joe, account acct
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and resellers AUTH_, OTHER_, the returned string is as
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follows: acct,acct:joe,AUTH_acct,OTHER_acct
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"""
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groups = [account, account_user]
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groups.extend(self.users[account_user]['groups'])
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if '.admin' in groups:
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groups.remove('.admin')
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for prefix in self._non_empty_reseller_prefixes():
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groups.append('%s%s' % (prefix, account))
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if account_id not in groups:
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groups.append(account_id)
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groups = ','.join(groups)
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return groups
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def get_groups(self, env, token):
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"""
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Get groups for the given token.
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:param env: The current WSGI environment dictionary.
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:param token: Token to validate and return a group string for.
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:returns: None if the token is invalid or a string containing a comma
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separated list of groups the authenticated user is a member
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of. The first group in the list is also considered a unique
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identifier for that user.
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"""
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groups = None
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memcache_client = cache_from_env(env)
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if not memcache_client:
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raise Exception('Memcache required')
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memcache_token_key = '%s/token/%s' % (self.reseller_prefix, token)
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cached_auth_data = memcache_client.get(memcache_token_key)
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if cached_auth_data:
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expires, groups = cached_auth_data
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if expires < time():
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groups = None
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if env.get('HTTP_AUTHORIZATION'):
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account_user, sign = \
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env['HTTP_AUTHORIZATION'].split(' ')[1].rsplit(':', 1)
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if account_user not in self.users:
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return None
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account, user = account_user.split(':', 1)
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account_id = self.users[account_user]['url'].rsplit('/', 1)[-1]
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path = env['PATH_INFO']
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env['PATH_INFO'] = path.replace(account_user, account_id, 1)
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msg = base64.urlsafe_b64decode(unquote(token))
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key = self.users[account_user]['key']
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s = base64.encodestring(hmac.new(key, msg, sha1).digest()).strip()
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if s != sign:
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return None
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groups = self._get_user_groups(account, account_user, account_id)
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return groups
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def account_acls(self, req):
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"""
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Return a dict of ACL data from the account server via get_account_info.
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Auth systems may define their own format, serialization, structure,
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and capabilities implemented in the ACL headers and persisted in the
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sysmeta data. However, auth systems are strongly encouraged to be
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interoperable with Tempauth.
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Account ACLs are set and retrieved via the header
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X-Account-Access-Control
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For header format and syntax, see:
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* :func:`swift.common.middleware.acl.parse_acl()`
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* :func:`swift.common.middleware.acl.format_acl()`
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"""
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info = get_account_info(req.environ, self.app, swift_source='TA')
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try:
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acls = acls_from_account_info(info)
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except ValueError as e1:
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self.logger.warn("Invalid ACL stored in metadata: %r" % e1)
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return None
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except NotImplementedError as e2:
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self.logger.warn("ACL version exceeds middleware version: %r" % e2)
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return None
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return acls
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def extract_acl_and_report_errors(self, req):
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"""
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Return a user-readable string indicating the errors in the input ACL,
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or None if there are no errors.
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"""
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acl_header = 'x-account-access-control'
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acl_data = req.headers.get(acl_header)
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result = parse_acl(version=2, data=acl_data)
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if result is None:
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return 'Syntax error in input (%r)' % acl_data
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tempauth_acl_keys = 'admin read-write read-only'.split()
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for key in result:
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# While it is possible to construct auth systems that collaborate
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# on ACLs, TempAuth is not such an auth system. At this point,
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# it thinks it is authoritative.
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if key not in tempauth_acl_keys:
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return "Key '%s' not recognized" % key
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for key in tempauth_acl_keys:
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if key not in result:
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continue
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if not isinstance(result[key], list):
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return "Value for key '%s' must be a list" % key
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for grantee in result[key]:
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if not isinstance(grantee, basestring):
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return "Elements of '%s' list must be strings" % key
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# Everything looks fine, no errors found
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internal_hdr = get_sys_meta_prefix('account') + 'core-access-control'
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req.headers[internal_hdr] = req.headers.pop(acl_header)
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return None
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def authorize(self, req):
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"""
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Returns None if the request is authorized to continue or a standard
|
|
WSGI response callable if not.
|
|
"""
|
|
try:
|
|
_junk, account, container, obj = req.split_path(1, 4, True)
|
|
except ValueError:
|
|
self.logger.increment('errors')
|
|
return HTTPNotFound(request=req)
|
|
|
|
if self._get_account_prefix(account) is None:
|
|
self.logger.debug("Account name: %s doesn't start with "
|
|
"reseller_prefix(s): %s."
|
|
% (account, ','.join(self.reseller_prefixes)))
|
|
return self.denied_response(req)
|
|
|
|
# At this point, TempAuth is convinced that it is authoritative.
|
|
# If you are sending an ACL header, it must be syntactically valid
|
|
# according to TempAuth's rules for ACL syntax.
|
|
acl_data = req.headers.get('x-account-access-control')
|
|
if acl_data is not None:
|
|
error = self.extract_acl_and_report_errors(req)
|
|
if error:
|
|
msg = 'X-Account-Access-Control invalid: %s\n\nInput: %s\n' % (
|
|
error, acl_data)
|
|
headers = [('Content-Type', 'text/plain; charset=UTF-8')]
|
|
return HTTPBadRequest(request=req, headers=headers, body=msg)
|
|
|
|
user_groups = (req.remote_user or '').split(',')
|
|
account_user = user_groups[1] if len(user_groups) > 1 else None
|
|
|
|
if '.reseller_admin' in user_groups and \
|
|
account not in self.reseller_prefixes and \
|
|
not self._dot_account(account):
|
|
req.environ['swift_owner'] = True
|
|
self.logger.debug("User %s has reseller admin authorizing."
|
|
% account_user)
|
|
return None
|
|
|
|
if account in user_groups and \
|
|
(req.method not in ('DELETE', 'PUT') or container):
|
|
# The user is admin for the account and is not trying to do an
|
|
# account DELETE or PUT
|
|
account_prefix = self._get_account_prefix(account)
|
|
require_group = self.account_rules.get(account_prefix).get(
|
|
'require_group')
|
|
if require_group and require_group in user_groups:
|
|
req.environ['swift_owner'] = True
|
|
self.logger.debug("User %s has admin and %s group."
|
|
" Authorizing." % (account_user,
|
|
require_group))
|
|
return None
|
|
elif not require_group:
|
|
req.environ['swift_owner'] = True
|
|
self.logger.debug("User %s has admin authorizing."
|
|
% account_user)
|
|
return None
|
|
|
|
if (req.environ.get('swift_sync_key')
|
|
and (req.environ['swift_sync_key'] ==
|
|
req.headers.get('x-container-sync-key', None))
|
|
and 'x-timestamp' in req.headers):
|
|
self.logger.debug("Allow request with container sync-key: %s."
|
|
% req.environ['swift_sync_key'])
|
|
return None
|
|
|
|
if req.method == 'OPTIONS':
|
|
#allow OPTIONS requests to proceed as normal
|
|
self.logger.debug("Allow OPTIONS request.")
|
|
return None
|
|
|
|
referrers, groups = parse_acl(getattr(req, 'acl', None))
|
|
|
|
if referrer_allowed(req.referer, referrers):
|
|
if obj or '.rlistings' in groups:
|
|
self.logger.debug("Allow authorizing %s via referer ACL."
|
|
% req.referer)
|
|
return None
|
|
|
|
for user_group in user_groups:
|
|
if user_group in groups:
|
|
self.logger.debug("User %s allowed in ACL: %s authorizing."
|
|
% (account_user, user_group))
|
|
return None
|
|
|
|
# Check for access via X-Account-Access-Control
|
|
acct_acls = self.account_acls(req)
|
|
if acct_acls:
|
|
# At least one account ACL is set in this account's sysmeta data,
|
|
# so we should see whether this user is authorized by the ACLs.
|
|
user_group_set = set(user_groups)
|
|
if user_group_set.intersection(acct_acls['admin']):
|
|
req.environ['swift_owner'] = True
|
|
self.logger.debug('User %s allowed by X-Account-Access-Control'
|
|
' (admin)' % account_user)
|
|
return None
|
|
if (user_group_set.intersection(acct_acls['read-write']) and
|
|
(container or req.method in ('GET', 'HEAD'))):
|
|
# The RW ACL allows all operations to containers/objects, but
|
|
# only GET/HEAD to accounts (and OPTIONS, above)
|
|
self.logger.debug('User %s allowed by X-Account-Access-Control'
|
|
' (read-write)' % account_user)
|
|
return None
|
|
if (user_group_set.intersection(acct_acls['read-only']) and
|
|
req.method in ('GET', 'HEAD')):
|
|
self.logger.debug('User %s allowed by X-Account-Access-Control'
|
|
' (read-only)' % account_user)
|
|
return None
|
|
|
|
return self.denied_response(req)
|
|
|
|
def denied_response(self, req):
|
|
"""
|
|
Returns a standard WSGI response callable with the status of 403 or 401
|
|
depending on whether the REMOTE_USER is set or not.
|
|
"""
|
|
if req.remote_user:
|
|
self.logger.increment('forbidden')
|
|
return HTTPForbidden(request=req)
|
|
else:
|
|
self.logger.increment('unauthorized')
|
|
return HTTPUnauthorized(request=req)
|
|
|
|
def handle(self, env, start_response):
|
|
"""
|
|
WSGI entry point for auth requests (ones that match the
|
|
self.auth_prefix).
|
|
Wraps env in swob.Request object and passes it down.
|
|
|
|
:param env: WSGI environment dictionary
|
|
:param start_response: WSGI callable
|
|
"""
|
|
try:
|
|
req = Request(env)
|
|
if self.auth_prefix:
|
|
req.path_info_pop()
|
|
req.bytes_transferred = '-'
|
|
req.client_disconnect = False
|
|
if 'x-storage-token' in req.headers and \
|
|
'x-auth-token' not in req.headers:
|
|
req.headers['x-auth-token'] = req.headers['x-storage-token']
|
|
return self.handle_request(req)(env, start_response)
|
|
except (Exception, Timeout):
|
|
print("EXCEPTION IN handle: %s: %s" % (format_exc(), env))
|
|
self.logger.increment('errors')
|
|
start_response('500 Server Error',
|
|
[('Content-Type', 'text/plain')])
|
|
return ['Internal server error.\n']
|
|
|
|
def handle_request(self, req):
|
|
"""
|
|
Entry point for auth requests (ones that match the self.auth_prefix).
|
|
Should return a WSGI-style callable (such as swob.Response).
|
|
|
|
:param req: swob.Request object
|
|
"""
|
|
req.start_time = time()
|
|
handler = None
|
|
try:
|
|
version, account, user, _junk = req.split_path(1, 4, True)
|
|
except ValueError:
|
|
self.logger.increment('errors')
|
|
return HTTPNotFound(request=req)
|
|
if version in ('v1', 'v1.0', 'auth'):
|
|
if req.method == 'GET':
|
|
handler = self.handle_get_token
|
|
if not handler:
|
|
self.logger.increment('errors')
|
|
req.response = HTTPBadRequest(request=req)
|
|
else:
|
|
req.response = handler(req)
|
|
return req.response
|
|
|
|
def handle_get_token(self, req):
|
|
"""
|
|
Handles the various `request for token and service end point(s)` calls.
|
|
There are various formats to support the various auth servers in the
|
|
past. Examples::
|
|
|
|
GET <auth-prefix>/v1/<act>/auth
|
|
X-Auth-User: <act>:<usr> or X-Storage-User: <usr>
|
|
X-Auth-Key: <key> or X-Storage-Pass: <key>
|
|
GET <auth-prefix>/auth
|
|
X-Auth-User: <act>:<usr> or X-Storage-User: <act>:<usr>
|
|
X-Auth-Key: <key> or X-Storage-Pass: <key>
|
|
GET <auth-prefix>/v1.0
|
|
X-Auth-User: <act>:<usr> or X-Storage-User: <act>:<usr>
|
|
X-Auth-Key: <key> or X-Storage-Pass: <key>
|
|
|
|
On successful authentication, the response will have X-Auth-Token and
|
|
X-Storage-Token set to the token to use with Swift and X-Storage-URL
|
|
set to the URL to the default Swift cluster to use.
|
|
|
|
:param req: The swob.Request to process.
|
|
:returns: swob.Response, 2xx on success with data set as explained
|
|
above.
|
|
"""
|
|
# Validate the request info
|
|
try:
|
|
pathsegs = split_path(req.path_info, 1, 3, True)
|
|
except ValueError:
|
|
self.logger.increment('errors')
|
|
return HTTPNotFound(request=req)
|
|
if pathsegs[0] == 'v1' and pathsegs[2] == 'auth':
|
|
account = pathsegs[1]
|
|
user = req.headers.get('x-storage-user')
|
|
if not user:
|
|
user = req.headers.get('x-auth-user')
|
|
if not user or ':' not in user:
|
|
self.logger.increment('token_denied')
|
|
return HTTPUnauthorized(request=req, headers=
|
|
{'Www-Authenticate':
|
|
'Swift realm="%s"' % account})
|
|
account2, user = user.split(':', 1)
|
|
if account != account2:
|
|
self.logger.increment('token_denied')
|
|
return HTTPUnauthorized(request=req, headers=
|
|
{'Www-Authenticate':
|
|
'Swift realm="%s"' % account})
|
|
key = req.headers.get('x-storage-pass')
|
|
if not key:
|
|
key = req.headers.get('x-auth-key')
|
|
elif pathsegs[0] in ('auth', 'v1.0'):
|
|
user = req.headers.get('x-auth-user')
|
|
if not user:
|
|
user = req.headers.get('x-storage-user')
|
|
if not user or ':' not in user:
|
|
self.logger.increment('token_denied')
|
|
return HTTPUnauthorized(request=req, headers=
|
|
{'Www-Authenticate':
|
|
'Swift realm="unknown"'})
|
|
account, user = user.split(':', 1)
|
|
key = req.headers.get('x-auth-key')
|
|
if not key:
|
|
key = req.headers.get('x-storage-pass')
|
|
else:
|
|
return HTTPBadRequest(request=req)
|
|
if not all((account, user, key)):
|
|
self.logger.increment('token_denied')
|
|
realm = account or 'unknown'
|
|
return HTTPUnauthorized(request=req, headers={'Www-Authenticate':
|
|
'Swift realm="%s"' %
|
|
realm})
|
|
# Authenticate user
|
|
account_user = account + ':' + user
|
|
if account_user not in self.users:
|
|
self.logger.increment('token_denied')
|
|
return HTTPUnauthorized(request=req, headers=
|
|
{'Www-Authenticate':
|
|
'Swift realm="%s"' % account})
|
|
if self.users[account_user]['key'] != key:
|
|
self.logger.increment('token_denied')
|
|
return HTTPUnauthorized(request=req, headers=
|
|
{'Www-Authenticate':
|
|
'Swift realm="unknown"'})
|
|
account_id = self.users[account_user]['url'].rsplit('/', 1)[-1]
|
|
# Get memcache client
|
|
memcache_client = cache_from_env(req.environ)
|
|
if not memcache_client:
|
|
raise Exception('Memcache required')
|
|
# See if a token already exists and hasn't expired
|
|
token = None
|
|
memcache_user_key = '%s/user/%s' % (self.reseller_prefix, account_user)
|
|
candidate_token = memcache_client.get(memcache_user_key)
|
|
if candidate_token:
|
|
memcache_token_key = \
|
|
'%s/token/%s' % (self.reseller_prefix, candidate_token)
|
|
cached_auth_data = memcache_client.get(memcache_token_key)
|
|
if cached_auth_data:
|
|
expires, old_groups = cached_auth_data
|
|
old_groups = old_groups.split(',')
|
|
new_groups = self._get_user_groups(account, account_user,
|
|
account_id)
|
|
|
|
if expires > time() and \
|
|
set(old_groups) == set(new_groups.split(',')):
|
|
token = candidate_token
|
|
# Create a new token if one didn't exist
|
|
if not token:
|
|
# Generate new token
|
|
token = '%stk%s' % (self.reseller_prefix, uuid4().hex)
|
|
expires = time() + self.token_life
|
|
groups = self._get_user_groups(account, account_user, account_id)
|
|
# Save token
|
|
memcache_token_key = '%s/token/%s' % (self.reseller_prefix, token)
|
|
memcache_client.set(memcache_token_key, (expires, groups),
|
|
time=float(expires - time()))
|
|
# Record the token with the user info for future use.
|
|
memcache_user_key = \
|
|
'%s/user/%s' % (self.reseller_prefix, account_user)
|
|
memcache_client.set(memcache_user_key, token,
|
|
time=float(expires - time()))
|
|
resp = Response(request=req, headers={
|
|
'x-auth-token': token, 'x-storage-token': token})
|
|
url = self.users[account_user]['url'].replace('$HOST', resp.host_url)
|
|
if self.storage_url_scheme != 'default':
|
|
url = self.storage_url_scheme + ':' + url.split(':', 1)[1]
|
|
resp.headers['x-storage-url'] = url
|
|
return resp
|
|
|
|
|
|
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)
|
|
register_swift_info('tempauth', account_acls=True)
|
|
|
|
def auth_filter(app):
|
|
return TempAuth(app, conf)
|
|
return auth_filter
|