79 lines
3.1 KiB
Python
79 lines
3.1 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# 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 keystone import auth
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from keystone.common import wsgi
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from keystone import exception
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from keystone.openstack.common import log
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from keystone.openstack.common import timeutils
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from keystone.token import provider
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METHOD_NAME = 'token'
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LOG = log.getLogger(__name__)
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class Token(auth.AuthMethodHandler):
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def __init__(self):
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self.provider = provider.Manager()
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def authenticate(self, context, auth_payload, user_context):
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try:
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if 'id' not in auth_payload:
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raise exception.ValidationError(attribute='id',
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target=METHOD_NAME)
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token_id = auth_payload['id']
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response = self.provider.validate_token(token_id)
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#for V3 tokens, the esential data is under the 'token' value.
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#For V2, the comparable data was nested under 'access'
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token_ref = response.get('token', response.get('access'))
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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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#priviledge attacks
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if 'OS-TRUST:trust' in token_ref:
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raise exception.Forbidden()
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if 'trust' in token_ref:
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raise exception.Forbidden()
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if 'trust_id' in token_ref.get('metadata', {}):
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raise exception.Forbidden()
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if 'OS-OAUTH1' in token_ref:
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raise exception.Forbidden()
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wsgi.validate_token_bind(context, token_ref)
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#new tokens are not allowed to extend the expiration
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#time of an old token, otherwise, they could be extened
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#forever. The expiration value was stored at different
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#locations in v2 and v3 tokens.
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expires_at = token_ref.get('expires_at')
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if not expires_at:
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expires_at = token_ref.get('expires')
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if not expires_at:
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expires_at = timeutils.normalize_time(
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timeutils.parse_isotime(token_ref['token']['expires']))
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user_context.setdefault('expires_at', expires_at)
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user_context.setdefault('user_id', token_ref['user']['id'])
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user_context['extras'].update(token_ref.get('extras', {}))
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user_context['method_names'].extend(token_ref.get('methods', []))
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except AssertionError as e:
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LOG.error(e)
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raise exception.Unauthorized(e)
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