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# Copyright (c) 2011-2014 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.
"""
Test authentication and authorization system.
Add to your pipeline in proxy-server.conf, such as::
[pipeline:main]
pipeline = catch_errors cache tempauth proxy-server
Set account auto creation to true in proxy-server.conf::
[app:proxy-server]
account_autocreate = true
And add a tempauth filter section, such as::
[filter:tempauth]
use = egg:swift#tempauth
user_admin_admin = admin .admin .reseller_admin
user_test_tester = testing .admin
user_test2_tester2 = testing2 .admin
user_test_tester3 = testing3
# To allow accounts/users with underscores you can base64 encode them.
# Here is the account "under_score" and username "a_b" (note the lack
# of padding equal signs):
user64_dW5kZXJfc2NvcmU_YV9i = testing4
See the proxy-server.conf-sample for more information.
Account/User List
^^^^^^^^^^^^^^^^^
All accounts/users are listed in the filter section. The format is::
user_<account>_<user> = <key> [group] [group] [...] [storage_url]
If you want to be able to include underscores in the ``<account>`` or
``<user>`` portions, you can base64 encode them (with *no* equal signs)
in a line like this::
user64_<account_b64>_<user_b64> = <key> [group] [...] [storage_url]
There are two special groups:
* ``.reseller_admin`` -- can do anything to any account for this auth
* ``.admin`` -- can do anything within the account
If neither of these groups are specified, the user can only access
containers that have been explicitly allowed for them by a ``.admin`` or
``.reseller_admin``.
The trailing optional ``storage_url`` allows you to specify an alternate
URL to hand back to the user upon authentication. If not specified, this
defaults to::
$HOST/v1/<reseller_prefix>_<account>
Where ``$HOST`` will do its best to resolve to what the requester would
need to use to reach this host, ``<reseller_prefix>`` is from this section,
and ``<account>`` is from the ``user_<account>_<user>`` name. Note that
``$HOST`` cannot possibly handle when you have a load balancer in front of
it that does https while TempAuth itself runs with http; in such a case,
you'll have to specify the ``storage_url_scheme`` configuration value as
an override.
Multiple Reseller Prefix Items
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
The reseller prefix specifies which parts of the account namespace this
middleware is responsible for managing authentication and authorization.
By default, the prefix is 'AUTH' so accounts and tokens are prefixed
by 'AUTH\_'. When a request's token and/or path start with 'AUTH\_', this
middleware knows it is responsible.
We allow the reseller prefix to be a list. In tempauth, the first item
in the list is used as the prefix for tokens and user groups. The
other prefixes provide alternate accounts that user's can access. For
example if the reseller prefix list is 'AUTH, OTHER', a user with
admin access to 'AUTH_account' also has admin access to
'OTHER_account'.
Required Group
^^^^^^^^^^^^^^
The group ``.admin`` is normally needed to access an account (ACLs provide
an additional way to access an account). You can specify the
``require_group`` parameter. This means that you also need the named group
to access an account. If you have several reseller prefix items, prefix
the ``require_group`` parameter with the appropriate prefix.
X-Service-Token
^^^^^^^^^^^^^^^
If an ``X-Service-Token`` is presented in the request headers, the groups
derived from the token are appended to the roles derived from
``X-Auth-Token``. If ``X-Auth-Token`` is missing or invalid,
``X-Service-Token`` is not processed.
The ``X-Service-Token`` is useful when combined with multiple reseller
prefix items. In the following configuration, accounts prefixed
``SERVICE\_`` are only accessible if ``X-Auth-Token`` is from the end-user
and ``X-Service-Token`` is from the ``glance`` user::
[filter:tempauth]
use = egg:swift#tempauth
reseller_prefix = AUTH, SERVICE
SERVICE_require_group = .service
user_admin_admin = admin .admin .reseller_admin
user_joeacct_joe = joepw .admin
user_maryacct_mary = marypw .admin
user_glance_glance = glancepw .service
The name ``.service`` is an example. Unlike ``.admin`` and
``.reseller_admin`` it is not a reserved name.
Please note that ACLs can be set on service accounts and are matched
against the identity validated by ``X-Auth-Token``. As such ACLs can grant
access to a service account's container without needing to provide a
service token, just like any other cross-reseller request using ACLs.
Account ACLs
^^^^^^^^^^^^
If a swift_owner issues a POST or PUT to the account with the
``X-Account-Access-Control`` header set in the request, then this may
allow certain types of access for additional users.
* Read-Only: Users with read-only access can list containers in the
account, list objects in any container, retrieve objects, and view
unprivileged account/container/object metadata.
* Read-Write: Users with read-write access can (in addition to the
read-only privileges) create objects, overwrite existing objects,
create new containers, and set unprivileged container/object
metadata.
* Admin: Users with admin access are swift_owners and can perform
any action, including viewing/setting privileged metadata (e.g.
changing account ACLs).
To generate headers for setting an account ACL::
from swift.common.middleware.acl import format_acl
acl_data = { 'admin': ['alice'], 'read-write': ['bob', 'carol'] }
header_value = format_acl(version=2, acl_dict=acl_data)
To generate a curl command line from the above::
token=...
storage_url=...
python -c '
from swift.common.middleware.acl import format_acl
acl_data = { 'admin': ['alice'], 'read-write': ['bob', 'carol'] }
headers = {'X-Account-Access-Control':
format_acl(version=2, acl_dict=acl_data)}
header_str = ' '.join(["-H '%s: %s'" % (k, v)
for k, v in headers.items()])
print('curl -D- -X POST -H "x-auth-token: $token" %s '
'$storage_url' % header_str)
'
"""
from __future__ import print_function
import json
from time import time
from traceback import format_exc
from uuid import uuid4
import base64
from eventlet import Timeout
import six
from swift.common.swob import Response, Request
from swift.common.swob import HTTPBadRequest, HTTPForbidden, HTTPNotFound, \
HTTPUnauthorized
from swift.common.request_helpers import get_sys_meta_prefix
from swift.common.middleware.acl import (
clean_acl, parse_acl, referrer_allowed, acls_from_account_info)
from swift.common.utils import cache_from_env, get_logger, \
split_path, config_true_value, register_swift_info
from swift.common.utils import config_read_reseller_options, quote
from swift.proxy.controllers.base import get_account_info
DEFAULT_TOKEN_LIFE = 86400
class TempAuth(object):
"""
:param app: The next WSGI app in the pipeline
:param conf: The dict of configuration values from the Paste config file
"""
def __init__(self, app, conf):
self.app = app
self.conf = conf
self.logger = get_logger(conf, log_route='tempauth')
self.log_headers = config_true_value(conf.get('log_headers', 'f'))
self.reseller_prefixes, self.account_rules = \
config_read_reseller_options(conf, dict(require_group=''))
self.reseller_prefix = self.reseller_prefixes[0]
self.logger.set_statsd_prefix('tempauth.%s' % (
self.reseller_prefix if self.reseller_prefix else 'NONE',))
self.auth_prefix = conf.get('auth_prefix', '/auth/')
if not self.auth_prefix or not self.auth_prefix.strip('/'):
self.logger.warning('Rewriting invalid auth prefix "%s" to '
'"/auth/" (Non-empty auth prefix path '
'is required)' % self.auth_prefix)
self.auth_prefix = '/auth/'
if not self.auth_prefix.startswith('/'):
self.auth_prefix = '/' + self.auth_prefix
if not self.auth_prefix.endswith('/'):
self.auth_prefix += '/'
self.token_life = int(conf.get('token_life', DEFAULT_TOKEN_LIFE))
self.allow_overrides = config_true_value(
conf.get('allow_overrides', 't'))
self.storage_url_scheme = conf.get('storage_url_scheme', 'default')
self.users = {}
for conf_key in conf:
if conf_key.startswith(('user_', 'user64_')):
account, username = conf_key.split('_', 1)[1].split('_')
if conf_key.startswith('user64_'):
# Because trailing equal signs would screw up config file
# parsing, we auto-pad with '=' chars.
account += '=' * (len(account) % 4)
account = base64.b64decode(account)
username += '=' * (len(username) % 4)
username = base64.b64decode(username)
values = conf[conf_key].split()
if not values:
raise ValueError('%s has no key set' % conf_key)
key = values.pop(0)
if values and ('://' in values[-1] or '$HOST' in values[-1]):
url = values.pop()
else:
url = '$HOST/v1/%s%s' % (
self.reseller_prefix, quote(account))
self.users[account + ':' + username] = {
'key': key, 'url': url, 'groups': values}
def __call__(self, env, start_response):
"""
Accepts a standard WSGI application call, authenticating the request
and installing callback hooks for authorization and ACL header
validation. For an authenticated request, REMOTE_USER will be set to a
comma separated list of the user's groups.
With a non-empty reseller prefix, acts as the definitive auth service
for just tokens and accounts that begin with that prefix, but will deny
requests outside this prefix if no other auth middleware overrides it.
With an empty reseller prefix, acts as the definitive auth service only
for tokens that validate to a non-empty set of groups. For all other
requests, acts as the fallback auth service when no other auth
middleware overrides it.
Alternatively, if the request matches the self.auth_prefix, the request
will be routed through the internal auth request handler (self.handle).
This is to handle granting tokens, etc.
"""
if self.allow_overrides and env.get('swift.authorize_override', False):
return self.app(env, start_response)
if env.get('PATH_INFO', '').startswith(self.auth_prefix):
return self.handle(env, start_response)
s3 = env.get('s3api.auth_details')
token = env.get('HTTP_X_AUTH_TOKEN', env.get('HTTP_X_STORAGE_TOKEN'))
service_token = env.get('HTTP_X_SERVICE_TOKEN')
if s3 or (token and token.startswith(self.reseller_prefix)):
# Note: Empty reseller_prefix will match all tokens.
groups = self.get_groups(env, token)
if service_token:
service_groups = self.get_groups(env, service_token)
if groups and service_groups:
groups += ',' + service_groups
if groups:
group_list = groups.split(',', 2)
if len(group_list) > 1:
user = group_list[1]
else:
user = group_list[0]
trans_id = env.get('swift.trans_id')
self.logger.debug('User: %s uses token %s (trans_id %s)' %
(user, 's3' if s3 else token, trans_id))
env['REMOTE_USER'] = groups
env['swift.authorize'] = self.authorize
env['swift.clean_acl'] = clean_acl
if '.reseller_admin' in groups:
env['reseller_request'] = True
else:
# Unauthorized token
if self.reseller_prefix and not s3:
# Because I know I'm the definitive auth for this token, I
# can deny it outright.
self.logger.increment('unauthorized')
try:
vrs, realm, rest = split_path(env['PATH_INFO'],
2, 3, True)
except ValueError:
realm = 'unknown'
return HTTPUnauthorized(headers={
'Www-Authenticate': 'Swift realm="%s"' % realm})(
env, start_response)
# Because I'm not certain if I'm the definitive auth for empty
# reseller_prefixed tokens, I won't overwrite swift.authorize.
elif 'swift.authorize' not in env:
env['swift.authorize'] = self.denied_response
else:
if self._is_definitive_auth(env.get('PATH_INFO', '')):
# Handle anonymous access to accounts I'm the definitive
# auth for.
env['swift.authorize'] = self.authorize
env['swift.clean_acl'] = clean_acl
elif self.reseller_prefix == '':
# Because I'm not certain if I'm the definitive auth, I won't
# overwrite swift.authorize.
if 'swift.authorize' not in env:
env['swift.authorize'] = self.authorize
env['swift.clean_acl'] = clean_acl
else:
# Not my token, not my account, I can't authorize this request,
# deny all is a good idea if not already set...
if 'swift.authorize' not in env:
env['swift.authorize'] = self.denied_response
return self.app(env, start_response)
def _is_definitive_auth(self, path):
"""
Determine if we are the definitive auth
Determines if we are the definitive auth for a given path.
If the account name is prefixed with something matching one
of the reseller_prefix items, then we are the auth (return True)
Non-matching: we are not the auth.
However, one of the reseller_prefix items can be blank. If
so, we cannot always be definite so return False.
:param path: A path (e.g., /v1/AUTH_joesaccount/c/o)
:return:True if we are definitive auth
"""
try:
version, account, rest = split_path(path, 1, 3, True)
except ValueError:
return False
if account:
return bool(self._get_account_prefix(account))
return False
def _non_empty_reseller_prefixes(self):
return iter([pre for pre in self.reseller_prefixes if pre != ''])
def _get_account_prefix(self, account):
"""
Get the prefix of an account
Determines which reseller prefix matches the account and returns
that prefix. If account does not start with one of the known
reseller prefixes, returns None.
:param account: Account name (e.g., AUTH_joesaccount) or None
:return: The prefix string (examples: 'AUTH_', 'SERVICE_', '')
If we can't match the prefix of the account, return None
"""
if account is None:
return None
# Empty prefix matches everything, so try to match others first
for prefix in self._non_empty_reseller_prefixes():
if account.startswith(prefix):
return prefix
if '' in self.reseller_prefixes:
return ''
return None
def _dot_account(self, account):
"""
Detect if account starts with dot character after the prefix
:param account: account in path (e.g., AUTH_joesaccount)
:return:True if name starts with dot character
"""
prefix = self._get_account_prefix(account)
return prefix is not None and account[len(prefix)] == '.'
def _get_user_groups(self, account, account_user, account_id):
"""
:param account: example: test
:param account_user: example: test:tester
:param account_id: example: AUTH_test
:return: a comma separated string of group names. The group names are
as follows: account,account_user,groups...
If .admin is in the groups, this is replaced by all the
possible account ids. For example, for user joe, account acct
and resellers AUTH_, OTHER_, the returned string is as
follows: acct,acct:joe,AUTH_acct,OTHER_acct
"""
groups = [account, account_user]
groups.extend(self.users[account_user]['groups'])
if '.admin' in groups:
groups.remove('.admin')
for prefix in self._non_empty_reseller_prefixes():
groups.append('%s%s' % (prefix, account))
if account_id not in groups:
groups.append(account_id)
groups = ','.join(groups)
return groups
def get_groups(self, env, token):
"""
Get groups for the given token.
:param env: The current WSGI environment dictionary.
:param token: Token to validate and return a group string for.
:returns: None if the token is invalid or a string containing a comma
separated list of groups the authenticated user is a member
of. The first group in the list is also considered a unique
identifier for that user.
"""
groups = None
memcache_client = cache_from_env(env)
if not memcache_client:
raise Exception('Memcache required')
memcache_token_key = '%s/token/%s' % (self.reseller_prefix, token)
cached_auth_data = memcache_client.get(memcache_token_key)
if cached_auth_data:
expires, groups = cached_auth_data
if expires < time():
groups = None
else:
groups = groups.encode('utf8')
s3_auth_details = env.get('s3api.auth_details')
if s3_auth_details:
if 'check_signature' not in s3_auth_details:
self.logger.warning(
'Swift3 did not provide a check_signature function; '
'upgrade Swift3 if you want to use it with tempauth')
return None
account_user = s3_auth_details['access_key']
if account_user not in self.users:
return None
user = self.users[account_user]
account = account_user.split(':', 1)[0]
account_id = user['url'].rsplit('/', 1)[-1]
if not s3_auth_details['check_signature'](user['key']):
return None
env['PATH_INFO'] = env['PATH_INFO'].replace(
account_user, account_id, 1)
groups = self._get_user_groups(account, account_user, account_id)
return groups
def account_acls(self, req):
"""
Return a dict of ACL data from the account server via get_account_info.
Auth systems may define their own format, serialization, structure,
and capabilities implemented in the ACL headers and persisted in the
sysmeta data. However, auth systems are strongly encouraged to be
interoperable with Tempauth.
Account ACLs are set and retrieved via the header
X-Account-Access-Control
For header format and syntax, see:
* :func:`swift.common.middleware.acl.parse_acl()`
* :func:`swift.common.middleware.acl.format_acl()`
"""
info = get_account_info(req.environ, self.app, swift_source='TA')
try:
acls = acls_from_account_info(info)
except ValueError as e1:
self.logger.warning("Invalid ACL stored in metadata: %r" % e1)
return None
except NotImplementedError as e2:
self.logger.warning(
"ACL version exceeds middleware version: %r"
% e2)
return None
return acls
def extract_acl_and_report_errors(self, req):
"""
Return a user-readable string indicating the errors in the input ACL,
or None if there are no errors.
"""
acl_header = 'x-account-access-control'
acl_data = req.headers.get(acl_header)
result = parse_acl(version=2, data=acl_data)
if result is None:
return 'Syntax error in input (%r)' % acl_data
tempauth_acl_keys = 'admin read-write read-only'.split()
for key in result:
# While it is possible to construct auth systems that collaborate
# on ACLs, TempAuth is not such an auth system. At this point,
# it thinks it is authoritative.
if key not in tempauth_acl_keys:
return "Key %s not recognized" % json.dumps(
key).encode('ascii')
for key in tempauth_acl_keys:
if key not in result:
continue
if not isinstance(result[key], list):
return "Value for key %s must be a list" % json.dumps(
key).encode('ascii')
for grantee in result[key]:
if not isinstance(grantee, six.string_types):
return "Elements of %s list must be strings" % json.dumps(
key).encode('ascii')
# Everything looks fine, no errors found
internal_hdr = get_sys_meta_prefix('account') + 'core-access-control'
req.headers[internal_hdr] = req.headers.pop(acl_header)
return None
def authorize(self, req):
"""
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 = split_path(req.path_info,
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')
auth = 'Swift realm="%s"' % account
return HTTPUnauthorized(request=req,
headers={'Www-Authenticate': auth})
account2, user = user.split(':', 1)
if account != account2:
self.logger.increment('token_denied')
auth = 'Swift realm="%s"' % account
return HTTPUnauthorized(request=req,
headers={'Www-Authenticate': auth})
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')
auth = 'Swift realm="unknown"'
return HTTPUnauthorized(request=req,
headers={'Www-Authenticate': auth})
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')
auth = 'Swift realm="%s"' % account
return HTTPUnauthorized(request=req,
headers={'Www-Authenticate': auth})
if self.users[account_user]['key'] != key:
self.logger.increment('token_denied')
auth = 'Swift realm="unknown"'
return HTTPUnauthorized(request=req,
headers={'Www-Authenticate': auth})
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 = [group.encode('utf8')
for group in 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,
'x-auth-token-expires': str(int(expires - time()))})
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