Source code for keystone.auth.plugins.token
# 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.
import flask
from oslo_log import log
from keystone.auth.plugins import base
from keystone.auth.plugins import mapped
from keystone.common import provider_api
import keystone.conf
from keystone import exception
from keystone.i18n import _
LOG = log.getLogger(__name__)
CONF = keystone.conf.CONF
PROVIDERS = provider_api.ProviderAPIs
[docs]class Token(base.AuthMethodHandler):
def _get_token_ref(self, auth_payload):
token_id = auth_payload['id']
return PROVIDERS.token_provider_api.validate_token(token_id)
[docs] def authenticate(self, auth_payload):
if 'id' not in auth_payload:
raise exception.ValidationError(attribute='id',
target='token')
token = self._get_token_ref(auth_payload)
if token.is_federated and PROVIDERS.federation_api:
response_data = mapped.handle_scoped_token(
token, PROVIDERS.federation_api,
PROVIDERS.identity_api
)
else:
response_data = token_authenticate(token)
# NOTE(notmorgan): The Token auth method is *very* special and sets the
# previous values to the method_names. This is because it can be used
# for re-scoping and we want to maintain the values. Most
# AuthMethodHandlers do no such thing and this is not required.
response_data.setdefault('method_names', []).extend(token.methods)
return base.AuthHandlerResponse(status=True, response_body=None,
response_data=response_data)
[docs]def token_authenticate(token):
response_data = {}
try:
# Do not allow tokens used for delegation to
# create another token, or perform any changes of
# state in Keystone. To do so is to invite elevation of
# privilege attacks
json_body = flask.request.get_json(silent=True, force=True) or {}
project_scoped = 'project' in json_body['auth'].get(
'scope', {}
)
domain_scoped = 'domain' in json_body['auth'].get(
'scope', {}
)
if token.oauth_scoped:
raise exception.ForbiddenAction(
action=_(
'Using OAuth-scoped token to create another token. '
'Create a new OAuth-scoped token instead'))
elif token.trust_scoped:
raise exception.ForbiddenAction(
action=_(
'Using trust-scoped token to create another token. '
'Create a new trust-scoped token instead'))
elif token.system_scoped and (project_scoped or domain_scoped):
raise exception.ForbiddenAction(
action=_(
'Using a system-scoped token to create a project-scoped '
'or domain-scoped token is not allowed.'
)
)
if not CONF.token.allow_rescope_scoped_token:
# Do not allow conversion from scoped tokens.
if token.project_scoped or token.domain_scoped:
raise exception.ForbiddenAction(
action=_('rescope a scoped token'))
# New tokens maintain the audit_id of the original token in the
# chain (if possible) as the second element in the audit data
# structure. Look for the last element in the audit data structure
# which will be either the audit_id of the token (in the case of
# a token that has not been rescoped) or the audit_chain id (in
# the case of a token that has been rescoped).
try:
token_audit_id = token.parent_audit_id or token.audit_id
except IndexError:
# NOTE(morganfainberg): In the case this is a token that was
# issued prior to audit id existing, the chain is not tracked.
token_audit_id = None
# To prevent users from never having to re-authenticate, the original
# token expiration time is maintained in the new token. Not doing this
# would make it possible for a user to continuously bump token
# expiration through token rescoping without proving their identity.
response_data.setdefault('expires_at', token.expires_at)
response_data['audit_id'] = token_audit_id
response_data.setdefault('user_id', token.user_id)
return response_data
except AssertionError as e:
LOG.error(e)
raise exception.Unauthorized(e)