127 lines
5.0 KiB
Python
127 lines
5.0 KiB
Python
# Copyright 2013 OpenStack Foundation
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# 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, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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from oslo_log import log
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import six
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from keystone.auth.plugins import base
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from keystone.auth.plugins import mapped
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from keystone.common import provider_api
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import keystone.conf
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from keystone import exception
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from keystone.i18n import _
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LOG = log.getLogger(__name__)
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CONF = keystone.conf.CONF
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PROVIDERS = provider_api.ProviderAPIs
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class Token(base.AuthMethodHandler):
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def _get_token_ref(self, auth_payload):
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token_id = auth_payload['id']
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return PROVIDERS.token_provider_api.validate_token(token_id)
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def authenticate(self, request, auth_payload):
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if 'id' not in auth_payload:
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raise exception.ValidationError(attribute='id',
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target='token')
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token = self._get_token_ref(auth_payload)
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if token.is_federated and PROVIDERS.federation_api:
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response_data = mapped.handle_scoped_token(
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request, token, PROVIDERS.federation_api,
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PROVIDERS.identity_api
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)
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else:
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response_data = token_authenticate(request, token)
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# NOTE(notmorgan): The Token auth method is *very* special and sets the
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# previous values to the method_names. This is because it can be used
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# for re-scoping and we want to maintain the values. Most
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# AuthMethodHandlers do no such thing and this is not required.
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response_data.setdefault('method_names', []).extend(token.methods)
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return base.AuthHandlerResponse(status=True, response_body=None,
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response_data=response_data)
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def token_authenticate(request, token):
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response_data = {}
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try:
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# Do not allow tokens used for delegation to
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# create another token, or perform any changes of
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# state in Keystone. To do so is to invite elevation of
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# privilege attacks
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project_scoped = 'project' in request.json_body['auth'].get(
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'scope', {}
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)
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domain_scoped = 'domain' in request.json_body['auth'].get(
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'scope', {}
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)
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if token.oauth_scoped:
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raise exception.ForbiddenAction(
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action=_(
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'Using OAuth-scoped token to create another token. '
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'Create a new OAuth-scoped token instead'))
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elif token.trust_scoped:
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raise exception.ForbiddenAction(
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action=_(
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'Using trust-scoped token to create another token. '
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'Create a new trust-scoped token instead'))
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elif token.system_scoped and (project_scoped or domain_scoped):
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raise exception.ForbiddenAction(
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action=_(
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'Using a system-scoped token to create a project-scoped '
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'or domain-scoped token is not allowed.'
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)
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)
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if not CONF.token.allow_rescope_scoped_token:
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# Do not allow conversion from scoped tokens.
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if token.project_scoped or token.domain_scoped:
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raise exception.ForbiddenAction(
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action=_('rescope a scoped token'))
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# New tokens maintain the audit_id of the original token in the
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# chain (if possible) as the second element in the audit data
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# structure. Look for the last element in the audit data structure
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# which will be either the audit_id of the token (in the case of
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# a token that has not been rescoped) or the audit_chain id (in
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# the case of a token that has been rescoped).
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try:
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token_audit_id = token.parent_audit_id or token.audit_id
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except IndexError:
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# NOTE(morganfainberg): In the case this is a token that was
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# issued prior to audit id existing, the chain is not tracked.
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token_audit_id = None
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# To prevent users from never having to re-authenticate, the original
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# token expiration time is maintained in the new token. Not doing this
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# would make it possible for a user to continuously bump token
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# expiration through token rescoping without proving their identity.
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response_data.setdefault('expires_at', token.expires_at)
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response_data['audit_id'] = token_audit_id
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response_data.setdefault('user_id', token.user_id)
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return response_data
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except AssertionError as e:
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LOG.error(six.text_type(e))
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raise exception.Unauthorized(e)
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