321 lines
13 KiB
Python
321 lines
13 KiB
Python
# 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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# This file handles all flask-restful resources for /v3/OS-TRUST
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# TODO(morgan): Deprecate /v3/OS-TRUST/trusts path in favour of /v3/trusts.
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# /v3/OS-TRUST should remain indefinitely.
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import flask
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import flask_restful
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from six.moves import http_client
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from keystone.api._shared import json_home_relations
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from keystone.common import context
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from keystone.common import json_home
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from keystone.common import provider_api
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from keystone.common import rbac_enforcer
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from keystone.common import utils
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from keystone.common import validation
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from keystone import exception
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from keystone.i18n import _
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from keystone.server import flask as ks_flask
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from keystone.trust import schema
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ENFORCER = rbac_enforcer.RBACEnforcer
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PROVIDERS = provider_api.ProviderAPIs
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_build_resource_relation = json_home_relations.os_trust_resource_rel_func
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_build_parameter_relation = json_home_relations.os_trust_parameter_rel_func
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TRUST_ID_PARAMETER_RELATION = _build_parameter_relation(
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parameter_name='trust_id')
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def _trustor_trustee_only(trust):
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user_id = flask.request.environ.get(context.REQUEST_CONTEXT_ENV).user_id
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if user_id not in [trust.get('trustee_user_id'),
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trust.get('trustor_user_id')]:
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raise exception.ForbiddenAction(
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action=_('Requested user has no relation to this trust'))
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def _normalize_trust_expires_at(trust):
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# correct isotime
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if trust.get('expires_at') is not None:
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trust['expires_at'] = utils.isotime(trust['expires_at'],
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subsecond=True)
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def _normalize_trust_roles(trust):
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# fill in role data
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trust_full_roles = []
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for trust_role in trust.get('roles', []):
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trust_role = trust_role['id']
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try:
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matching_role = PROVIDERS.role_api.get_role(trust_role)
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full_role = ks_flask.ResourceBase.wrap_member(
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matching_role, collection_name='roles', member_name='role')
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trust_full_roles.append(full_role['role'])
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except exception.RoleNotFound:
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pass
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trust['roles'] = trust_full_roles
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trust['roles_links'] = {
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'self': ks_flask.base_url(path='/%s/roles' % trust['id']),
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'next': None,
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'previous': None}
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class TrustResource(ks_flask.ResourceBase):
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collection_key = 'trusts'
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member_key = 'trust'
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api_prefix = '/OS-TRUST'
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json_home_resource_rel_func = _build_resource_relation
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json_home_parameter_rel_func = _build_parameter_relation
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def _check_unrestricted(self):
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token = self.auth_context['token']
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if 'application_credential' in token.methods:
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if not token.application_credential['unrestricted']:
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action = _("Using method 'application_credential' is not "
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"allowed for managing trusts.")
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raise exception.ForbiddenAction(action=action)
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def _find_redelegated_trust(self):
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# Check if delegated via trust
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redelegated_trust = None
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if self.oslo_context.is_delegated_auth:
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src_trust_id = self.oslo_context.trust_id
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if not src_trust_id:
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action = _('Redelegation allowed for delegated by trust only')
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raise exception.ForbiddenAction(action=action)
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redelegated_trust = PROVIDERS.trust_api.get_trust(src_trust_id)
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return redelegated_trust
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@staticmethod
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def _parse_expiration_date(expiration_date):
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if expiration_date is not None:
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return utils.parse_expiration_date(expiration_date)
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return None
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def _require_trustor_has_role_in_project(self, trust):
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trustor_roles = self._get_trustor_roles(trust)
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for trust_role in trust['roles']:
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matching_roles = [x for x in trustor_roles
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if x == trust_role['id']]
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if not matching_roles:
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raise exception.RoleNotFound(role_id=trust_role['id'])
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def _get_trustor_roles(self, trust):
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original_trust = trust.copy()
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while original_trust.get('redelegated_trust_id'):
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original_trust = PROVIDERS.trust_api.get_trust(
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original_trust['redelegated_trust_id'])
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if not ((trust.get('project_id')) in [None, '']):
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# Check project exists.
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PROVIDERS.resource_api.get_project(trust['project_id'])
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# Get a list of roles including any domain specific roles
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assignment_list = PROVIDERS.assignment_api.list_role_assignments(
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user_id=original_trust['trustor_user_id'],
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project_id=original_trust['project_id'],
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effective=True, strip_domain_roles=False)
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return list({x['role_id'] for x in assignment_list})
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else:
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return []
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def _normalize_role_list(self, trust_roles):
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roles = []
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for role in trust_roles:
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if role.get('id'):
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roles.append({'id': role['id']})
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else:
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roles.append(
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PROVIDERS.role_api.get_unique_role_by_name(role['name']))
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return roles
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def _get_trust(self, trust_id):
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ENFORCER.enforce_call(action='identity:get_trust')
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trust = PROVIDERS.trust_api.get_trust(trust_id)
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_trustor_trustee_only(trust)
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_normalize_trust_expires_at(trust)
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_normalize_trust_roles(trust)
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return self.wrap_member(trust)
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def _list_trusts(self):
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ENFORCER.enforce_call(action='identity:list_trusts')
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trusts = []
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trustor_user_id = flask.request.args.get('trustor_user_id')
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trustee_user_id = flask.request.args.get('trustee_user_id')
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if not flask.request.args:
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# NOTE(morgan): Admin can list all trusts.
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ENFORCER.enforce_call(action='admin_required')
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trusts += PROVIDERS.trust_api.list_trusts()
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# TODO(morgan): Convert the trustor/trustee checks into policy
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# checkstr we can enforce on. This is duplication of code
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# behavior/design as the OS-TRUST controller for ease of review/
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# comparison of previous code. Minor optimizations [checks before db
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# hits] have been done.
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action = _('Cannot list trusts for another user')
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if trustor_user_id:
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if trustor_user_id != self.oslo_context.user_id:
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raise exception.Forbidden(action=action)
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if trustee_user_id:
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if trustee_user_id != self.oslo_context.user_id:
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raise exception.Forbidden(action=action)
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trusts += PROVIDERS.trust_api.list_trusts_for_trustor(trustor_user_id)
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trusts += PROVIDERS.trust_api.list_trusts_for_trustee(trustee_user_id)
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for trust in trusts:
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# get_trust returns roles, list_trusts does not
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# It seems in some circumstances, roles does not
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# exist in the query response, so check first
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if 'roles' in trust:
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del trust['roles']
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if trust.get('expires_at') is not None:
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trust['expires_at'] = utils.isotime(trust['expires_at'],
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subsecond=True)
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return self.wrap_collection(trusts)
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def get(self, trust_id=None):
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"""Dispatch for GET/HEAD or LIST trusts."""
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if trust_id is not None:
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return self._get_trust(trust_id=trust_id)
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else:
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return self._list_trusts()
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def post(self):
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"""Create a new trust.
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The User creating the trust must be the trustor.
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"""
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ENFORCER.enforce_call(action='identity:create_trust')
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trust = flask.request.json.get('trust', {})
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validation.lazy_validate(schema.trust_create, trust)
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self._check_unrestricted()
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if trust.get('project_id') and not trust.get('roles'):
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action = _('At least one role should be specified')
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raise exception.ForbiddenAction(action=action)
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if self.oslo_context.user_id != trust.get('trustor_user_id'):
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action = _("The authenticated user should match the trustor")
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raise exception.ForbiddenAction(action=action)
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# Ensure the trustee exists
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PROVIDERS.identity_api.get_user(trust['trustee_user_id'])
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# Normalize roles
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trust['roles'] = self._normalize_role_list(trust.get('roles', []))
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self._require_trustor_has_role_in_project(trust)
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trust['expires_at'] = self._parse_expiration_date(
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trust.get('expires_at'))
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trust = self._assign_unique_id(trust)
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redelegated_trust = self._find_redelegated_trust()
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return_trust = PROVIDERS.trust_api.create_trust(
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trust_id=trust['id'],
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trust=trust,
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roles=trust['roles'],
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redelegated_trust=redelegated_trust,
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initiator=self.audit_initiator)
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_normalize_trust_expires_at(return_trust)
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_normalize_trust_roles(return_trust)
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return self.wrap_member(return_trust), http_client.CREATED
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def delete(self, trust_id):
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ENFORCER.enforce_call(action='identity:delete_trust')
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self._check_unrestricted()
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trust = PROVIDERS.trust_api.get_trust(trust_id)
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# TODO(morgan): convert this check to an oslo_policy checkstr that
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# can be referenced/enforced on.
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if (self.oslo_context.user_id != trust.get('trustor_user_id') and
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not self.oslo_context.is_admin):
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action = _('Only admin or trustor can delete a trust')
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raise exception.ForbiddenAction(action=action)
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PROVIDERS.trust_api.delete_trust(trust_id,
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initiator=self.audit_initiator)
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return '', http_client.NO_CONTENT
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# NOTE(morgan): Since this Resource is not being used with the automatic
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# URL additions and does not have a collection key/member_key, we use
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# the flask-restful Resource, not the keystone ResourceBase
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class RolesForTrustListResource(flask_restful.Resource):
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def get(self, trust_id):
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ENFORCER.enforce_call(action='identity:list_roles_for_trust')
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# NOTE(morgan): This duplicates a little of the .get_trust from the
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# main resource, as it needs some of the same logic. However, due to
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# how flask-restful works, this should be fully encapsulated
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trust = PROVIDERS.trust_api.get_trust(trust_id)
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_trustor_trustee_only(trust)
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_normalize_trust_expires_at(trust)
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_normalize_trust_roles(trust)
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return {'roles': trust['roles'],
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'links': trust['roles_links']}
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# NOTE(morgan): Since this Resource is not being used with the automatic
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# URL additions and does not have a collection key/member_key, we use
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# the flask-restful Resource, not the keystone ResourceBase
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class RoleForTrustResource(flask_restful.Resource):
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def get(self, trust_id, role_id):
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"""Get a role that has been assigned to a trust."""
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ENFORCER.enforce_call(action='identity:get_role_for_trust')
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trust = PROVIDERS.trust_api.get_trust(trust_id)
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_trustor_trustee_only(trust)
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if not any(role['id'] == role_id for role in trust['roles']):
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raise exception.RoleNotFound(role_id=role_id)
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role = PROVIDERS.role_api.get_role(role_id)
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return ks_flask.ResourceBase.wrap_member(role, collection_name='roles',
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member_name='role')
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class TrustAPI(ks_flask.APIBase):
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_name = 'trusts'
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_import_name = __name__
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resources = [TrustResource]
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resource_mapping = [
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ks_flask.construct_resource_map(
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resource=RolesForTrustListResource,
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url='/trusts/<string:trust_id>/roles',
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resource_kwargs={},
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rel='trust_roles',
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path_vars={
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'trust_id': TRUST_ID_PARAMETER_RELATION},
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resource_relation_func=_build_resource_relation),
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ks_flask.construct_resource_map(
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resource=RoleForTrustResource,
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url='/trusts/<string:trust_id>/roles/<string:role_id>',
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resource_kwargs={},
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rel='trust_role',
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path_vars={
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'trust_id': TRUST_ID_PARAMETER_RELATION,
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'role_id': json_home.Parameters.ROLE_ID},
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resource_relation_func=_build_resource_relation),
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]
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_api_url_prefix = '/OS-TRUST'
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APIs = (TrustAPI,)
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