# 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.
"""Unified in-memory token model."""
from oslo_log import log
from oslo_serialization import jsonutils
from oslo_serialization import msgpackutils
from oslo_utils import reflection
import six
from keystone.common import cache
from keystone.common import provider_api
from keystone import exception
from keystone.i18n import _
LOG = log.getLogger(__name__)
PROVIDERS = provider_api.ProviderAPIs
# supported token versions
V3 = 'v3.0'
VERSIONS = frozenset([V3])
# minimum access rules support
ACCESS_RULES_MIN_VERSION = 1.0
[docs]class TokenModel(object):
"""An object that represents a token emitted by keystone.
This is a queryable object that other parts of keystone can use to reason
about a user's authentication or authorization.
"""
def __init__(self):
self.user_id = None
self.__user = None
self.__user_domain = None
self.methods = None
self.audit_id = None
self.parent_audit_id = None
self.__expires_at = None
self.__issued_at = None
self.system = None
self.domain_id = None
self.__domain = None
self.project_id = None
self.__project = None
self.__project_domain = None
self.trust_id = None
self.__trust = None
self.__trustor = None
self.__trustee = None
self.__trust_project = None
self.__trust_project_domain = None
self.is_federated = False
self.identity_provider_id = None
self.protocol_id = None
self.federated_groups = None
self.access_token_id = None
self.__access_token = None
self.application_credential_id = None
self.__application_credential = None
def __repr__(self):
"""Return string representation of TokenModel."""
desc = ('<%(type)s (audit_id=%(audit_id)s, '
'audit_chain_id=%(audit_ids)s) at %(loc)s>')
self_cls_name = reflection.get_class_name(self, fully_qualified=False)
return desc % {'type': self_cls_name,
'audit_id': self.audit_id,
'audit_ids': self.audit_ids,
'loc': hex(id(self))}
@property
def audit_ids(self):
if self.parent_audit_id:
return [self.audit_id, self.parent_audit_id]
return [self.audit_id]
@property
def expires_at(self):
return self.__expires_at
@expires_at.setter
def expires_at(self, value):
if not isinstance(value, six.string_types):
raise ValueError('expires_at must be a string.')
self.__expires_at = value
@property
def issued_at(self):
return self.__issued_at
@issued_at.setter
def issued_at(self, value):
if not isinstance(value, six.string_types):
raise ValueError('issued_at must be a string.')
self.__issued_at = value
@property
def unscoped(self):
return not any(
[self.system_scoped, self.domain_scoped, self.project_scoped,
self.trust_scoped]
)
@property
def system_scoped(self):
return self.system is not None
@property
def user(self):
if not self.__user:
if self.user_id:
self.__user = PROVIDERS.identity_api.get_user(self.user_id)
return self.__user
@property
def user_domain(self):
if not self.__user_domain:
if self.user:
self.__user_domain = PROVIDERS.resource_api.get_domain(
self.user['domain_id']
)
return self.__user_domain
@property
def domain(self):
if not self.__domain:
if self.domain_id:
self.__domain = PROVIDERS.resource_api.get_domain(
self.domain_id
)
return self.__domain
@property
def domain_scoped(self):
return self.domain_id is not None
@property
def project(self):
if not self.__project:
if self.project_id:
self.__project = PROVIDERS.resource_api.get_project(
self.project_id
)
return self.__project
@property
def project_scoped(self):
return self.project_id is not None
@property
def project_domain(self):
if not self.__project_domain:
if self.project and self.project.get('domain_id'):
self.__project_domain = PROVIDERS.resource_api.get_domain(
self.project['domain_id']
)
return self.__project_domain
@property
def application_credential(self):
if not self.__application_credential:
if self.application_credential_id:
app_cred_api = PROVIDERS.application_credential_api
self.__application_credential = (
app_cred_api.get_application_credential(
self.application_credential_id
)
)
return self.__application_credential
@property
def oauth_scoped(self):
return self.access_token_id is not None
@property
def access_token(self):
if not self.__access_token:
if self.access_token_id:
self.__access_token = PROVIDERS.oauth_api.get_access_token(
self.access_token_id
)
return self.__access_token
@property
def trust_scoped(self):
return self.trust_id is not None
@property
def trust(self):
if not self.__trust:
if self.trust_id:
self.__trust = PROVIDERS.trust_api.get_trust(self.trust_id)
return self.__trust
@property
def trustor(self):
if not self.__trustor:
if self.trust:
self.__trustor = PROVIDERS.identity_api.get_user(
self.trust['trustor_user_id']
)
return self.__trustor
@property
def trustee(self):
if not self.__trustee:
if self.trust:
self.__trustee = PROVIDERS.identity_api.get_user(
self.trust['trustee_user_id']
)
return self.__trustee
@property
def trust_project(self):
if not self.__trust_project:
if self.trust:
self.__trust_project = PROVIDERS.resource_api.get_project(
self.trust['project_id']
)
return self.__trust_project
@property
def trust_project_domain(self):
if not self.__trust_project_domain:
if self.trust:
self.__trust_project_domain = (
PROVIDERS.resource_api.get_domain(
self.trust_project['domain_id']
)
)
return self.__trust_project_domain
def _get_system_roles(self):
roles = []
groups = PROVIDERS.identity_api.list_groups_for_user(self.user_id)
all_group_roles = []
assignments = []
for group in groups:
group_roles = (
PROVIDERS.assignment_api.list_system_grants_for_group(
group['id']
)
)
for role in group_roles:
all_group_roles.append(role)
assignment = {'group_id': group['id'], 'role_id': role['id']}
assignments.append(assignment)
user_roles = PROVIDERS.assignment_api.list_system_grants_for_user(
self.user_id
)
for role in user_roles:
assignment = {'user_id': self.user_id, 'role_id': role['id']}
assignments.append(assignment)
# NOTE(lbragstad): The whole reason we need to build out a list of
# "assignments" as opposed to just using the nice list of roles we
# already have is because the add_implied_roles() method operates on a
# list of assignment dictionaries (containing role_id,
# user_id/group_id, project_id, et cetera). That method could probably
# be fixed to be more clear by operating on actual roles instead of
# just assignments.
assignments = PROVIDERS.assignment_api.add_implied_roles(assignments)
for assignment in assignments:
role = PROVIDERS.role_api.get_role(assignment['role_id'])
roles.append({'id': role['id'], 'name': role['name']})
return roles
def _get_trust_roles(self):
roles = []
# If redelegated_trust_id is set, then we must traverse the trust_chain
# in order to determine who the original trustor is. We need to do this
# because the user ID of the original trustor helps us determine scope
# in the redelegated context.
if self.trust.get('redelegated_trust_id'):
trust_chain = PROVIDERS.trust_api.get_trust_pedigree(
self.trust_id
)
original_trustor_id = trust_chain[-1]['trustor_user_id']
else:
original_trustor_id = self.trustor['id']
trust_roles = [
{'role_id': role['id']} for role in self.trust['roles']
]
effective_trust_roles = (
PROVIDERS.assignment_api.add_implied_roles(trust_roles)
)
effective_trust_role_ids = (
set([r['role_id'] for r in effective_trust_roles])
)
current_effective_trustor_roles = (
PROVIDERS.assignment_api.get_roles_for_trustor_and_project(
original_trustor_id, self.trust.get('project_id')
)
)
for trust_role_id in effective_trust_role_ids:
if trust_role_id in current_effective_trustor_roles:
role = PROVIDERS.role_api.get_role(trust_role_id)
if role['domain_id'] is None:
roles.append(role)
else:
raise exception.Forbidden(
_('Trustee has no delegated roles.'))
return roles
def _get_oauth_roles(self):
roles = []
access_token_roles = self.access_token['role_ids']
access_token_roles = [
{'role_id': r} for r in jsonutils.loads(access_token_roles)]
effective_access_token_roles = (
PROVIDERS.assignment_api.add_implied_roles(access_token_roles)
)
user_roles = [r['id'] for r in self._get_project_roles()]
for role in effective_access_token_roles:
if role['role_id'] in user_roles:
role = PROVIDERS.role_api.get_role(role['role_id'])
roles.append({'id': role['id'], 'name': role['name']})
return roles
def _get_federated_roles(self):
roles = []
group_ids = [group['id'] for group in self.federated_groups]
federated_roles = PROVIDERS.assignment_api.get_roles_for_groups(
group_ids, self.project_id, self.domain_id
)
for group_id in group_ids:
group_roles = (
PROVIDERS.assignment_api.list_system_grants_for_group(
group_id
)
)
for role in group_roles:
federated_roles.append(role)
user_roles = PROVIDERS.assignment_api.list_system_grants_for_user(
self.user_id
)
for role in user_roles:
federated_roles.append(role)
if self.domain_id:
domain_roles = (
PROVIDERS.assignment_api.get_roles_for_user_and_domain(
self.user_id, self.domain_id
)
)
for role in domain_roles:
federated_roles.append(role)
if self.project_id:
project_roles = (
PROVIDERS.assignment_api.get_roles_for_user_and_project(
self.user_id, self.project_id
)
)
for role in project_roles:
federated_roles.append(role)
# NOTE(lbragstad): Remove duplicate role references from a list of
# roles. It is often suggested that this be done with:
#
# roles = [dict(t) for t in set([tuple(d.items()) for d in roles])]
#
# But that doesn't actually remove duplicates in all cases and
# causes transient failures because dictionaries are unordered
# objects. This means {'id': 1, 'foo': 'bar'} and {'foo': 'bar',
# 'id': 1} won't actually resolve to a single entity in the above
# logic since they are both considered unique. By using `in` we're
# performing a containment check, which also does a deep comparison
# of the objects, which is what we want.
for role in federated_roles:
if not isinstance(role, dict):
role = PROVIDERS.role_api.get_role(role)
if role not in roles:
roles.append(role)
return roles
def _get_domain_roles(self):
roles = []
domain_roles = (
PROVIDERS.assignment_api.get_roles_for_user_and_domain(
self.user_id, self.domain_id
)
)
for role_id in domain_roles:
role = PROVIDERS.role_api.get_role(role_id)
roles.append({'id': role['id'], 'name': role['name']})
return roles
def _get_project_roles(self):
roles = []
project_roles = (
PROVIDERS.assignment_api.get_roles_for_user_and_project(
self.user_id, self.project_id
)
)
for role_id in project_roles:
r = PROVIDERS.role_api.get_role(role_id)
roles.append({'id': r['id'], 'name': r['name']})
return roles
def _get_application_credential_roles(self):
roles = []
app_cred_roles = self.application_credential['roles']
assignment_list = PROVIDERS.assignment_api.list_role_assignments(
user_id=self.user_id,
project_id=self.project_id,
domain_id=self.domain_id,
effective=True)
user_roles = list(set([x['role_id'] for x in assignment_list]))
for role in app_cred_roles:
if role['id'] in user_roles:
roles.append({'id': role['id'], 'name': role['name']})
return roles
@property
def roles(self):
if self.system_scoped:
roles = self._get_system_roles()
elif self.trust_scoped:
roles = self._get_trust_roles()
elif self.oauth_scoped:
roles = self._get_oauth_roles()
elif self.is_federated and not self.unscoped:
roles = self._get_federated_roles()
elif self.domain_scoped:
roles = self._get_domain_roles()
elif self.application_credential_id and self.project_id:
roles = self._get_application_credential_roles()
elif self.project_scoped:
roles = self._get_project_roles()
else:
roles = []
return roles
def _validate_token_resources(self):
if self.project and not self.project.get('enabled'):
msg = ('Unable to validate token because project %(id)s is '
'disabled') % {'id': self.project_id}
tr_msg = _('Unable to validate token because project %(id)s is '
'disabled') % {'id': self.project_id}
LOG.warning(msg)
raise exception.ProjectNotFound(tr_msg)
if self.project and not self.project_domain.get('enabled'):
msg = ('Unable to validate token because domain %(id)s is '
'disabled') % {'id': self.project_domain['id']}
tr_msg = _('Unable to validate token because domain %(id)s is '
'disabled') % {'id': self.project_domain['id']}
LOG.warning(msg)
raise exception.DomainNotFound(tr_msg)
def _validate_token_user(self):
if self.trust_scoped:
if self.user_id != self.trustee['id']:
raise exception.Forbidden(_('User is not a trustee.'))
try:
PROVIDERS.resource_api.assert_domain_enabled(
self.trustor['domain_id']
)
except AssertionError:
raise exception.TokenNotFound(_('Trustor domain is disabled.'))
try:
PROVIDERS.resource_api.assert_domain_enabled(
self.trustee['domain_id']
)
except AssertionError:
raise exception.TokenNotFound(_('Trustee domain is disabled.'))
try:
PROVIDERS.identity_api.assert_user_enabled(
self.trustor['id']
)
except AssertionError:
raise exception.Forbidden(_('Trustor is disabled.'))
if not self.user_domain.get('enabled'):
msg = ('Unable to validate token because domain %(id)s is '
'disabled') % {'id': self.user_domain['id']}
tr_msg = _('Unable to validate token because domain %(id)s is '
'disabled') % {'id': self.user_domain['id']}
LOG.warning(msg)
raise exception.DomainNotFound(tr_msg)
def _validate_system_scope(self):
if self.system_scoped and not self.roles:
msg = ('User %(user_id)s has no access to the system'
) % {'user_id': self.user_id}
tr_msg = _('User %(user_id)s has no access to the system'
) % {'user_id': self.user_id}
LOG.debug(msg)
raise exception.Unauthorized(tr_msg)
def _validate_domain_scope(self):
if self.domain_scoped and not self.roles:
msg = (
'User %(user_id)s has no access to domain %(domain_id)s'
) % {'user_id': self.user_id, 'domain_id': self.domain_id}
tr_msg = _(
'User %(user_id)s has no access to domain %(domain_id)s'
) % {'user_id': self.user_id, 'domain_id': self.domain_id}
LOG.debug(msg)
raise exception.Unauthorized(tr_msg)
def _validate_project_scope(self):
if self.project_scoped and not self.roles:
msg = (
'User %(user_id)s has no access to project %(project_id)s'
) % {'user_id': self.user_id, 'project_id': self.project_id}
tr_msg = _(
'User %(user_id)s has no access to project %(project_id)s'
) % {'user_id': self.user_id, 'project_id': self.project_id}
LOG.debug(msg)
raise exception.Unauthorized(tr_msg)
def _validate_trust_scope(self):
trust_roles = []
if self.trust_id:
refs = [{'role_id': role['id']} for role in self.trust['roles']]
effective_trust_roles = PROVIDERS.assignment_api.add_implied_roles(
refs
)
effective_trust_role_ids = (
set([r['role_id'] for r in effective_trust_roles])
)
current_effective_trustor_roles = (
PROVIDERS.assignment_api.get_roles_for_trustor_and_project(
self.trustor['id'], self.trust.get('project_id')
)
)
# Go through each of the effective trust roles, making sure the
# trustor still has them, if any have been removed, then we
# will treat the trust as invalid
for trust_role_id in effective_trust_role_ids:
if trust_role_id in current_effective_trustor_roles:
role = PROVIDERS.role_api.get_role(trust_role_id)
if role['domain_id'] is None:
trust_roles.append(role)
else:
raise exception.Forbidden(
_('Trustee has no delegated roles.'))
[docs] def mint(self, token_id, issued_at):
"""Set the ``id`` and ``issued_at`` attributes of a token.
The process of building a token requires setting attributes about the
authentication and authorization context, like ``user_id`` and
``project_id`` for example. Once a Token object accurately represents
this information it should be "minted". Tokens are minted when they get
an ``id`` attribute and their creation time is recorded.
"""
self._validate_token_resources()
self._validate_token_user()
self._validate_system_scope()
self._validate_domain_scope()
self._validate_project_scope()
self._validate_trust_scope()
self.id = token_id
self.issued_at = issued_at
class _TokenModelHandler(object):
identity = 126
handles = (TokenModel,)
def __init__(self, registry):
self._registry = registry
def serialize(self, obj):
serialized = msgpackutils.dumps(obj.__dict__, registry=self._registry)
return serialized
def deserialize(self, data):
token_data = msgpackutils.loads(data, registry=self._registry)
try:
token_model = TokenModel()
for k, v in iter(token_data.items()):
setattr(token_model, k, v)
except Exception:
LOG.debug(
"Failed to deserialize TokenModel. Data is %s", token_data
)
raise exception.CacheDeserializationError(
TokenModel.__name__, token_data
)
return token_model
cache.register_model_handler(_TokenModelHandler)
