OpenStack Identity (Keystone)
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# 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 uuid
from oslo_utils import timeutils
from keystone import assignment
from keystone.common import controller
from keystone.common import dependency
from keystone.common import driver_hints
from keystone.common import utils
from keystone.common import validation
from keystone import exception
from keystone.i18n import _
from keystone import notifications
from keystone.trust import schema
def _trustor_trustee_only(trust, user_id):
if user_id not in [trust.get('trustee_user_id'),
trust.get('trustor_user_id')]:
raise exception.Forbidden()
@dependency.requires('assignment_api', 'identity_api', 'resource_api',
'role_api', 'token_provider_api', 'trust_api')
class TrustV3(controller.V3Controller):
collection_name = "trusts"
member_name = "trust"
@classmethod
def base_url(cls, context, path=None):
"""Construct a path and pass it to V3Controller.base_url method."""
# NOTE(stevemar): Overriding path to /OS-TRUST/trusts so that
# V3Controller.base_url handles setting the self link correctly.
path = '/OS-TRUST/' + cls.collection_name
return super(TrustV3, cls).base_url(context, path=path)
def get_trust(self, request, trust_id):
trust = self.trust_api.get_trust(trust_id)
_trustor_trustee_only(trust, request.context.user_id)
self._fill_in_roles(request.context_dict, trust)
return TrustV3.wrap_member(request.context_dict, trust)
def _fill_in_roles(self, context, trust):
if trust.get('expires_at') is not None:
trust['expires_at'] = (utils.isotime
(trust['expires_at'],
subsecond=True))
trust_full_roles = []
for trust_role in trust.get('roles', []):
if isinstance(trust_role, dict):
trust_role = trust_role['id']
try:
matching_role = self.role_api.get_role(trust_role)
full_role = assignment.controllers.RoleV3.wrap_member(
context, matching_role)['role']
trust_full_roles.append(full_role)
except exception.RoleNotFound:
pass
trust['roles'] = trust_full_roles
trust['roles_links'] = {
'self': (self.base_url(context) + "/%s/roles" % trust['id']),
'next': None,
'previous': None}
def _normalize_role_list(self, trust_roles):
roles = [{'id': role['id']} for role in trust_roles if 'id' in role]
names = [role['name'] for role in trust_roles if 'id' not in role]
if len(names):
# Long way
for name in names:
hints = driver_hints.Hints()
hints.add_filter("name", name, case_sensitive=True)
found_roles = self.role_api.list_roles(hints)
if len(found_roles) == 1:
roles.append({'id': found_roles[0]['id']})
else:
raise exception.RoleNotFound(_("role %s is not defined") %
name)
return roles
def _find_redelegated_trust(self, request):
# Check if delegated via trust
if request.context.is_delegated_auth:
# Redelegation case
src_trust_id = request.context.trust_id
if not src_trust_id:
raise exception.Forbidden(
_('Redelegation allowed for delegated by trust only'))
redelegated_trust = self.trust_api.get_trust(src_trust_id)
else:
redelegated_trust = None
return redelegated_trust
@controller.protected()
def create_trust(self, request, trust):
"""Create a new trust.
The user creating the trust must be the trustor.
"""
validation.lazy_validate(schema.trust_create, trust)
redelegated_trust = self._find_redelegated_trust(request)
if trust.get('project_id') and not trust.get('roles'):
msg = _('At least one role should be specified.')
raise exception.Forbidden(msg)
# the creating user must be the trustor
if request.context.user_id != trust.get('trustor_user_id'):
msg = _("The authenticated user should match the trustor.")
raise exception.Forbidden(msg)
# ensure trustee exists
self.identity_api.get_user(trust['trustee_user_id'])
# Normalize roles
normalized_roles = self._normalize_role_list(trust.get('roles', []))
trust['roles'] = normalized_roles
self._require_trustor_has_role_in_project(trust)
trust['expires_at'] = self._parse_expiration_date(
trust.get('expires_at'))
trust_id = uuid.uuid4().hex
initiator = notifications._get_request_audit_info(request.context_dict)
new_trust = self.trust_api.create_trust(trust_id, trust,
normalized_roles,
redelegated_trust,
initiator)
self._fill_in_roles(request.context_dict, new_trust)
return TrustV3.wrap_member(request.context_dict, new_trust)
def _get_trustor_roles(self, trust):
original_trust = trust.copy()
while original_trust.get('redelegated_trust_id'):
original_trust = self.trust_api.get_trust(
original_trust['redelegated_trust_id'])
if not self._attribute_is_empty(trust, 'project_id'):
self.resource_api.get_project(original_trust['project_id'])
# Get a list of roles including any domain specific roles
assignment_list = self.assignment_api.list_role_assignments(
user_id=original_trust['trustor_user_id'],
project_id=original_trust['project_id'],
effective=True, strip_domain_roles=False)
return list(set([x['role_id'] for x in assignment_list]))
else:
return []
def _require_trustor_has_role_in_project(self, trust):
trustor_roles = self._get_trustor_roles(trust)
for trust_role in trust['roles']:
matching_roles = [x for x in trustor_roles
if x == trust_role['id']]
if not matching_roles:
raise exception.RoleNotFound(role_id=trust_role['id'])
def _parse_expiration_date(self, expiration_date):
if expiration_date is None:
return None
if not expiration_date.endswith('Z'):
expiration_date += 'Z'
try:
expiration_time = timeutils.parse_isotime(expiration_date)
except ValueError:
raise exception.ValidationTimeStampError()
if timeutils.is_older_than(expiration_time, 0):
raise exception.ValidationExpirationError()
return expiration_time
@controller.protected()
def list_trusts(self, request):
trusts = []
trustor_user_id = request.params.get('trustor_user_id')
trustee_user_id = request.params.get('trustee_user_id')
if not request.params:
self.assert_admin(request)
trusts += self.trust_api.list_trusts()
if trustor_user_id:
if trustor_user_id != request.context.user_id:
raise exception.Forbidden()
trusts += self.trust_api.list_trusts_for_trustor(trustor_user_id)
if trustee_user_id:
if trustee_user_id != request.context.user_id:
raise exception.Forbidden()
trusts += self.trust_api.list_trusts_for_trustee(trustee_user_id)
for trust in trusts:
# get_trust returns roles, list_trusts does not
# It seems in some circumstances, roles does not
# exist in the query response, so check first
if 'roles' in trust:
del trust['roles']
if trust.get('expires_at') is not None:
trust['expires_at'] = utils.isotime(trust['expires_at'],
subsecond=True)
return TrustV3.wrap_collection(request.context_dict, trusts)
@controller.protected()
def delete_trust(self, request, trust_id):
trust = self.trust_api.get_trust(trust_id)
if (request.context.user_id != trust.get('trustor_user_id') and
not request.context.is_admin):
raise exception.Forbidden()
initiator = notifications._get_request_audit_info(request.context_dict)
self.trust_api.delete_trust(trust_id, initiator)
@controller.protected()
def list_roles_for_trust(self, request, trust_id):
trust = self.get_trust(request, trust_id)['trust']
_trustor_trustee_only(trust, request.context.user_id)
return {'roles': trust['roles'],
'links': trust['roles_links']}
@controller.protected()
def get_role_for_trust(self, request, trust_id, role_id):
"""Get a role that has been assigned to a trust."""
trust = self.trust_api.get_trust(trust_id)
_trustor_trustee_only(trust, request.context.user_id)
if not any(role['id'] == role_id for role in trust['roles']):
raise exception.RoleNotFound(role_id=role_id)
role = self.role_api.get_role(role_id)
return assignment.controllers.RoleV3.wrap_member(request.context_dict,
role)