559ba206d4
Across the project, make the common log import consistent. Change-Id: I937cd5d337db5d2296dd9238685803bbba3391b3
408 lines
15 KiB
Python
408 lines
15 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
|
|
|
|
# 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 collections
|
|
import functools
|
|
import uuid
|
|
|
|
from keystone.common import dependency
|
|
from keystone.common import wsgi
|
|
from keystone import config
|
|
from keystone import exception
|
|
from keystone.openstack.common import log
|
|
from keystone.openstack.common import versionutils
|
|
|
|
|
|
LOG = log.getLogger(__name__)
|
|
CONF = config.CONF
|
|
DEFAULT_DOMAIN_ID = CONF.identity.default_domain_id
|
|
|
|
v2_deprecated = versionutils.deprecated(what='v2 API',
|
|
as_of=versionutils.deprecated.ICEHOUSE,
|
|
in_favor_of='v3 API')
|
|
|
|
|
|
def _build_policy_check_credentials(self, action, context, kwargs):
|
|
LOG.debug(_('RBAC: Authorizing %(action)s(%(kwargs)s)'), {
|
|
'action': action,
|
|
'kwargs': ', '.join(['%s=%s' % (k, kwargs[k]) for k in kwargs])})
|
|
|
|
try:
|
|
token_ref = self.token_api.get_token(context['token_id'])
|
|
except exception.TokenNotFound:
|
|
LOG.warning(_('RBAC: Invalid token'))
|
|
raise exception.Unauthorized()
|
|
|
|
# NOTE(jamielennox): whilst this maybe shouldn't be within this function
|
|
# it would otherwise need to reload the token_ref from backing store.
|
|
wsgi.validate_token_bind(context, token_ref)
|
|
|
|
creds = {}
|
|
if 'token_data' in token_ref and 'token' in token_ref['token_data']:
|
|
#V3 Tokens
|
|
token_data = token_ref['token_data']['token']
|
|
try:
|
|
creds['user_id'] = token_data['user']['id']
|
|
except AttributeError:
|
|
LOG.warning(_('RBAC: Invalid user'))
|
|
raise exception.Unauthorized()
|
|
|
|
if 'project' in token_data:
|
|
creds['project_id'] = token_data['project']['id']
|
|
else:
|
|
LOG.debug(_('RBAC: Proceeding without project'))
|
|
|
|
if 'domain' in token_data:
|
|
creds['domain_id'] = token_data['domain']['id']
|
|
|
|
if 'roles' in token_data:
|
|
creds['roles'] = []
|
|
for role in token_data['roles']:
|
|
creds['roles'].append(role['name'])
|
|
else:
|
|
#v2 Tokens
|
|
creds = token_ref.get('metadata', {}).copy()
|
|
try:
|
|
creds['user_id'] = token_ref['user'].get('id')
|
|
except AttributeError:
|
|
LOG.warning(_('RBAC: Invalid user'))
|
|
raise exception.Unauthorized()
|
|
try:
|
|
creds['project_id'] = token_ref['tenant'].get('id')
|
|
except AttributeError:
|
|
LOG.debug(_('RBAC: Proceeding without tenant'))
|
|
# NOTE(vish): this is pretty inefficient
|
|
creds['roles'] = [self.assignment_api.get_role(role)['name']
|
|
for role in creds.get('roles', [])]
|
|
|
|
return creds
|
|
|
|
|
|
def flatten(d, parent_key=''):
|
|
"""Flatten a nested dictionary
|
|
|
|
Converts a dictionary with nested values to a single level flat
|
|
dictionary, with dotted notation for each key.
|
|
|
|
"""
|
|
items = []
|
|
for k, v in d.items():
|
|
new_key = parent_key + '.' + k if parent_key else k
|
|
if isinstance(v, collections.MutableMapping):
|
|
items.extend(flatten(v, new_key).items())
|
|
else:
|
|
items.append((new_key, v))
|
|
return dict(items)
|
|
|
|
|
|
def protected(callback=None):
|
|
"""Wraps API calls with role based access controls (RBAC).
|
|
|
|
This handles both the protection of the API parameters as well as any
|
|
target entities for single-entity API calls.
|
|
|
|
More complex API calls (for example that deal with several different
|
|
entities) should pass in a callback function, that will be subsequently
|
|
called to check protection for these multiple entities. This callback
|
|
function should gather the appropriate entities needed and then call
|
|
check_proetction() in the V3Controller class.
|
|
|
|
"""
|
|
def wrapper(f):
|
|
@functools.wraps(f)
|
|
def inner(self, context, *args, **kwargs):
|
|
if 'is_admin' in context and context['is_admin']:
|
|
LOG.warning(_('RBAC: Bypassing authorization'))
|
|
elif callback is not None:
|
|
prep_info = {'f_name': f.__name__,
|
|
'input_attr': kwargs}
|
|
callback(self, context, prep_info, *args, **kwargs)
|
|
else:
|
|
action = 'identity:%s' % f.__name__
|
|
creds = _build_policy_check_credentials(self, action,
|
|
context, kwargs)
|
|
|
|
policy_dict = {}
|
|
|
|
# Check to see if we need to include the target entity in our
|
|
# policy checks. We deduce this by seeing if the class has
|
|
# specified a get_member() method and that kwargs contains the
|
|
# appropriate entity id.
|
|
if (hasattr(self, 'get_member_from_driver') and
|
|
self.get_member_from_driver is not None):
|
|
key = '%s_id' % self.member_name
|
|
if key in kwargs:
|
|
ref = self.get_member_from_driver(kwargs[key])
|
|
policy_dict['target'] = {self.member_name: ref}
|
|
|
|
# TODO(henry-nash): Move this entire code to a member
|
|
# method inside v3 Auth
|
|
if context.get('subject_token_id') is not None:
|
|
token_ref = self.token_api.get_token(
|
|
context['subject_token_id'])
|
|
policy_dict.setdefault('target', {})
|
|
policy_dict['target'].setdefault(self.member_name, {})
|
|
policy_dict['target'][self.member_name]['user_id'] = (
|
|
token_ref['user_id'])
|
|
if 'domain' in token_ref['user']:
|
|
policy_dict['target'][self.member_name].setdefault(
|
|
'user', {})
|
|
policy_dict['target'][self.member_name][
|
|
'user'].setdefault('domain', {})
|
|
policy_dict['target'][self.member_name]['user'][
|
|
'domain']['id'] = (
|
|
token_ref['user']['domain']['id'])
|
|
|
|
# Add in the kwargs, which means that any entity provided as a
|
|
# parameter for calls like create and update will be included.
|
|
policy_dict.update(kwargs)
|
|
self.policy_api.enforce(creds, action, flatten(policy_dict))
|
|
LOG.debug(_('RBAC: Authorization granted'))
|
|
return f(self, context, *args, **kwargs)
|
|
return inner
|
|
return wrapper
|
|
|
|
|
|
def filterprotected(*filters):
|
|
"""Wraps filtered API calls with role based access controls (RBAC)."""
|
|
|
|
def _filterprotected(f):
|
|
@functools.wraps(f)
|
|
def wrapper(self, context, **kwargs):
|
|
if not context['is_admin']:
|
|
action = 'identity:%s' % f.__name__
|
|
creds = _build_policy_check_credentials(self, action,
|
|
context, kwargs)
|
|
# Now, build the target dict for policy check. We include:
|
|
#
|
|
# - Any query filter parameters
|
|
# - Data from the main url (which will be in the kwargs
|
|
# parameter) and would typically include the prime key
|
|
# of a get/update/delete call
|
|
#
|
|
# First any query filter parameters
|
|
target = dict()
|
|
if filters:
|
|
for item in filters:
|
|
if item in context['query_string']:
|
|
target[item] = context['query_string'][item]
|
|
|
|
LOG.debug(_('RBAC: Adding query filter params (%s)'), (
|
|
', '.join(['%s=%s' % (item, target[item])
|
|
for item in target])))
|
|
|
|
# Now any formal url parameters
|
|
for key in kwargs:
|
|
target[key] = kwargs[key]
|
|
|
|
self.policy_api.enforce(creds, action, flatten(target))
|
|
|
|
LOG.debug(_('RBAC: Authorization granted'))
|
|
else:
|
|
LOG.warning(_('RBAC: Bypassing authorization'))
|
|
return f(self, context, filters, **kwargs)
|
|
return wrapper
|
|
return _filterprotected
|
|
|
|
|
|
class V2Controller(wsgi.Application):
|
|
"""Base controller class for Identity API v2."""
|
|
def _normalize_domain_id(self, context, ref):
|
|
"""Fill in domain_id since v2 calls are not domain-aware.
|
|
|
|
This will overwrite any domain_id that was inadvertently
|
|
specified in the v2 call.
|
|
|
|
"""
|
|
ref['domain_id'] = DEFAULT_DOMAIN_ID
|
|
return ref
|
|
|
|
@staticmethod
|
|
def filter_domain_id(ref):
|
|
"""Remove domain_id since v2 calls are not domain-aware."""
|
|
ref.pop('domain_id', None)
|
|
return ref
|
|
|
|
|
|
@dependency.requires('policy_api', 'token_api')
|
|
class V3Controller(wsgi.Application):
|
|
"""Base controller class for Identity API v3.
|
|
|
|
Child classes should set the ``collection_name`` and ``member_name`` class
|
|
attributes, representing the collection of entities they are exposing to
|
|
the API. This is required for supporting self-referential links,
|
|
pagination, etc.
|
|
|
|
"""
|
|
|
|
collection_name = 'entities'
|
|
member_name = 'entity'
|
|
get_member_from_driver = None
|
|
|
|
@classmethod
|
|
def base_url(cls, path=None):
|
|
endpoint = CONF.public_endpoint % CONF
|
|
|
|
# allow a missing trailing slash in the config
|
|
if endpoint[-1] != '/':
|
|
endpoint += '/'
|
|
|
|
url = endpoint + 'v3'
|
|
|
|
if path:
|
|
return url + path
|
|
else:
|
|
return url + '/' + cls.collection_name
|
|
|
|
@classmethod
|
|
def _add_self_referential_link(cls, ref):
|
|
ref.setdefault('links', {})
|
|
ref['links']['self'] = cls.base_url() + '/' + ref['id']
|
|
|
|
@classmethod
|
|
def wrap_member(cls, context, ref):
|
|
cls._add_self_referential_link(ref)
|
|
return {cls.member_name: ref}
|
|
|
|
@classmethod
|
|
def wrap_collection(cls, context, refs, filters=[]):
|
|
for f in filters:
|
|
refs = cls.filter_by_attribute(context, refs, f)
|
|
|
|
refs = cls.paginate(context, refs)
|
|
|
|
for ref in refs:
|
|
cls.wrap_member(context, ref)
|
|
|
|
container = {cls.collection_name: refs}
|
|
container['links'] = {
|
|
'next': None,
|
|
'self': cls.base_url(path=context['path']),
|
|
'previous': None}
|
|
return container
|
|
|
|
@classmethod
|
|
def paginate(cls, context, refs):
|
|
"""Paginates a list of references by page & per_page query strings."""
|
|
# FIXME(dolph): client needs to support pagination first
|
|
return refs
|
|
|
|
page = context['query_string'].get('page', 1)
|
|
per_page = context['query_string'].get('per_page', 30)
|
|
return refs[per_page * (page - 1):per_page * page]
|
|
|
|
@classmethod
|
|
def filter_by_attribute(cls, context, refs, attr):
|
|
"""Filters a list of references by query string value."""
|
|
|
|
def _attr_match(ref_attr, val_attr):
|
|
"""Matches attributes allowing for booleans as strings.
|
|
|
|
We test explicitly for a value that defines it as 'False',
|
|
which also means that the existence of the attribute with
|
|
no value implies 'True'
|
|
|
|
"""
|
|
if type(ref_attr) is bool:
|
|
if (isinstance(val_attr, basestring) and
|
|
val_attr == '0'):
|
|
val = False
|
|
else:
|
|
val = True
|
|
return (ref_attr == val)
|
|
else:
|
|
return (ref_attr == val_attr)
|
|
|
|
if attr in context['query_string']:
|
|
value = context['query_string'][attr]
|
|
return [r for r in refs if _attr_match(
|
|
flatten(r).get(attr), value)]
|
|
return refs
|
|
|
|
def _require_matching_id(self, value, ref):
|
|
"""Ensures the value matches the reference's ID, if any."""
|
|
if 'id' in ref and ref['id'] != value:
|
|
raise exception.ValidationError('Cannot change ID')
|
|
|
|
def _assign_unique_id(self, ref):
|
|
"""Generates and assigns a unique identifer to a reference."""
|
|
ref = ref.copy()
|
|
ref['id'] = uuid.uuid4().hex
|
|
return ref
|
|
|
|
def _get_domain_id_for_request(self, context):
|
|
"""Get the domain_id for a v3 call."""
|
|
|
|
if context['is_admin']:
|
|
return DEFAULT_DOMAIN_ID
|
|
|
|
# Fish the domain_id out of the token
|
|
#
|
|
# We could make this more efficient by loading the domain_id
|
|
# into the context in the wrapper function above (since
|
|
# this version of normalize_domain will only be called inside
|
|
# a v3 protected call). However, this optimization is probably not
|
|
# worth the duplication of state
|
|
try:
|
|
token_ref = self.token_api.get_token(context['token_id'])
|
|
except exception.TokenNotFound:
|
|
LOG.warning(_('Invalid token in _get_domain_id_for_request'))
|
|
raise exception.Unauthorized()
|
|
|
|
if 'domain' in token_ref:
|
|
return token_ref['domain']['id']
|
|
else:
|
|
return DEFAULT_DOMAIN_ID
|
|
|
|
def _normalize_domain_id(self, context, ref):
|
|
"""Fill in domain_id if not specified in a v3 call."""
|
|
if 'domain_id' not in ref:
|
|
ref['domain_id'] = self._get_domain_id_for_request(context)
|
|
return ref
|
|
|
|
@staticmethod
|
|
def filter_domain_id(ref):
|
|
"""Override v2 filter to let domain_id out for v3 calls."""
|
|
return ref
|
|
|
|
def check_protection(self, context, prep_info, target_attr=None):
|
|
"""Provide call protection for complex target attributes.
|
|
|
|
As well as including the standard parameters from the original API
|
|
call (which is passed in prep_info), this call will add in any
|
|
additional entities or attributes (passed in target_attr), so that
|
|
they can be referenced by policy rules.
|
|
|
|
"""
|
|
if 'is_admin' in context and context['is_admin']:
|
|
LOG.warning(_('RBAC: Bypassing authorization'))
|
|
else:
|
|
action = 'identity:%s' % prep_info['f_name']
|
|
# TODO(henry-nash) need to log the target attributes as well
|
|
creds = _build_policy_check_credentials(self, action,
|
|
context,
|
|
prep_info['input_attr'])
|
|
# Build the dict the policy engine will check against from both the
|
|
# parameters passed into the call we are protecting (which was
|
|
# stored in the prep_info by protected()), plus the target
|
|
# attributes provided.
|
|
policy_dict = {}
|
|
if target_attr:
|
|
policy_dict = {'target': target_attr}
|
|
policy_dict.update(prep_info['input_attr'])
|
|
self.policy_api.enforce(creds, action, flatten(policy_dict))
|
|
LOG.debug(_('RBAC: Authorization granted'))
|