683 lines
24 KiB
Python
683 lines
24 KiB
Python
# 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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import functools
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import uuid
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from oslo_log import log
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from oslo_log import versionutils
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import six
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from keystone.common import authorization
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from keystone.common import dependency
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from keystone.common import driver_hints
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from keystone.common import utils
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from keystone.common import wsgi
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import keystone.conf
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from keystone import exception
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from keystone.i18n import _
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LOG = log.getLogger(__name__)
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CONF = keystone.conf.CONF
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def v2_ec2_deprecated(f):
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@six.wraps(f)
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def wrapper(*args, **kwargs):
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deprecated = versionutils.deprecated(
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what=f.__name__ + ' of the v2 EC2 APIs',
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as_of=versionutils.deprecated.MITAKA,
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in_favor_of=('a similar function in the v3 Credential APIs'),
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remove_in=+7)
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return deprecated(f)
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return wrapper()
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def v2_auth_deprecated(f):
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@six.wraps(f)
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def wrapper(*args, **kwargs):
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deprecated = versionutils.deprecated(
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what=f.__name__ + ' of the v2 Authentication APIs',
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as_of=versionutils.deprecated.MITAKA,
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in_favor_of=('a similar function in the v3 Authentication APIs'),
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remove_in=+7)
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return deprecated(f)
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return wrapper()
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def protected(callback=None):
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"""Wrap API calls with role based access controls (RBAC).
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This handles both the protection of the API parameters as well as any
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target entities for single-entity API calls.
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More complex API calls (for example that deal with several different
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entities) should pass in a callback function, that will be subsequently
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called to check protection for these multiple entities. This callback
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function should gather the appropriate entities needed and then call
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check_protection() in the V3Controller class.
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"""
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def wrapper(f):
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@functools.wraps(f)
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def inner(self, request, *args, **kwargs):
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check_function = authorization.check_protection
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if callback is not None:
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check_function = callback
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protected_wrapper(
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self, f, check_function, request, None, *args, **kwargs)
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return f(self, request, *args, **kwargs)
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return inner
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return wrapper
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def filterprotected(*filters, **callback):
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"""Wrap API list calls with role based access controls (RBAC).
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This handles both the protection of the API parameters as well as any
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filters supplied.
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More complex API list calls (for example that need to examine the contents
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of an entity referenced by one of the filters) should pass in a callback
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function, that will be subsequently called to check protection for these
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multiple entities. This callback function should gather the appropriate
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entities needed and then call check_protection() in the V3Controller class.
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"""
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def _handle_filters(filters, request):
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target = dict()
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if filters:
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for item in filters:
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if item in request.params:
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target[item] = request.params[item]
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LOG.debug('RBAC: Adding query filter params (%s)', (
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', '.join(['%s=%s' % (item, target[item])
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for item in target])))
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return target
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def _filterprotected(f):
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@functools.wraps(f)
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def wrapper(self, request, **kwargs):
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filter_attr = _handle_filters(filters, request)
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check_function = authorization.check_protection
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if 'callback' in callback and callback['callback'] is not None:
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# A callback has been specified to load additional target
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# data, so pass it the formal url params as well as the
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# list of filters, so it can augment these and then call
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# the check_protection() method.
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check_function = callback['callback']
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protected_wrapper(
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self, f, check_function, request, filter_attr, **kwargs)
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return f(self, request, filters, **kwargs)
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return wrapper
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return _filterprotected
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# Unified calls for the decorators above.
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# TODO(ayoung): Continue the refactoring. Always call check_protection
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# explicitly, by removing the calls to check protection from the callbacks.
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# Instead, have a call to the callbacks inserted prior to the call to
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# `check_protection`.
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def protected_wrapper(self, f, check_function, request, filter_attr,
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*args, **kwargs):
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request.assert_authenticated()
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if request.context.is_admin:
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LOG.warning('RBAC: Bypassing authorization')
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return
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prep_info = {'f_name': f.__name__,
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'input_attr': kwargs}
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if (filter_attr):
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prep_info['filter_attr'] = filter_attr
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check_function(self, request, prep_info, *args, **kwargs)
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class V2Controller(wsgi.Application):
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"""Base controller class for Identity API v2."""
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def _normalize_domain_id(self, request, ref):
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"""Fill in domain_id since v2 calls are not domain-aware.
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This will overwrite any domain_id that was inadvertently
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specified in the v2 call.
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"""
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ref['domain_id'] = CONF.identity.default_domain_id
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return ref
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@staticmethod
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def filter_domain_id(ref):
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"""Remove domain_id since v2 calls are not domain-aware."""
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ref.pop('domain_id', None)
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return ref
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@staticmethod
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def filter_domain(ref):
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"""Remove domain since v2 calls are not domain-aware."""
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ref.pop('domain', None)
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return ref
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@staticmethod
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def filter_project_parent_id(ref):
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"""Remove parent_id since v2 calls are not hierarchy-aware."""
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ref.pop('parent_id', None)
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return ref
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@staticmethod
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def filter_is_domain(ref):
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"""Remove is_domain field since v2 calls are not domain-aware."""
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ref.pop('is_domain', None)
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return ref
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@staticmethod
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def normalize_username_in_response(ref):
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"""Add username to outgoing user refs to match the v2 spec.
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Internally we use `name` to represent a user's name. The v2 spec
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requires the use of `username` instead.
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"""
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if 'username' not in ref and 'name' in ref:
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ref['username'] = ref['name']
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return ref
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@staticmethod
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def normalize_username_in_request(ref):
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"""Add name in incoming user refs to match the v2 spec.
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Internally we use `name` to represent a user's name. The v2 spec
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requires the use of `username` instead.
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"""
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if 'name' not in ref and 'username' in ref:
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ref['name'] = ref.pop('username')
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return ref
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@staticmethod
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def v3_to_v2_user(ref):
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"""Convert a user_ref from v3 to v2 compatible.
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* v2.0 users are not domain aware, and should have domain_id removed
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* v2.0 users expect the use of tenantId instead of default_project_id
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* v2.0 users have a username attribute
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* v2.0 remove password_expires_at
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If ref is a list type, we will iterate through each element and do the
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conversion.
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"""
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def _format_default_project_id(ref):
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"""Convert default_project_id to tenantId for v2 calls."""
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default_project_id = ref.pop('default_project_id', None)
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if default_project_id is not None:
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ref['tenantId'] = default_project_id
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elif 'tenantId' in ref:
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# NOTE(morganfainberg): To avoid v2.0 confusion if somehow a
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# tenantId property sneaks its way into the extra blob on the
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# user, we remove it here. If default_project_id is set, we
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# would override it in either case.
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del ref['tenantId']
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def _normalize_and_filter_user_properties(ref):
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"""Run through the various filter/normalization methods."""
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_format_default_project_id(ref)
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ref.pop('password_expires_at', None)
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V2Controller.filter_domain(ref)
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V2Controller.filter_domain_id(ref)
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V2Controller.normalize_username_in_response(ref)
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return ref
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if isinstance(ref, dict):
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return _normalize_and_filter_user_properties(ref)
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elif isinstance(ref, list):
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return [_normalize_and_filter_user_properties(x) for x in ref]
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else:
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raise ValueError(_('Expected dict or list: %s') % type(ref))
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@staticmethod
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def v3_to_v2_project(ref):
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"""Convert a project_ref from v3 to v2.
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* v2.0 projects are not domain aware, and should have domain_id removed
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* v2.0 projects are not hierarchy aware, and should have parent_id
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removed
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This method should only be applied to project_refs being returned from
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the v2.0 controller(s).
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If ref is a list type, we will iterate through each element and do the
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conversion.
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"""
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def _filter_project_properties(ref):
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"""Run through the various filter methods."""
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V2Controller.filter_domain_id(ref)
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V2Controller.filter_project_parent_id(ref)
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V2Controller.filter_is_domain(ref)
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return ref
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if isinstance(ref, dict):
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return _filter_project_properties(ref)
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elif isinstance(ref, list):
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return [_filter_project_properties(x) for x in ref]
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else:
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raise ValueError(_('Expected dict or list: %s') % type(ref))
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def format_project_list(self, tenant_refs, **kwargs):
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"""Format a v2 style project list, including marker/limits."""
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marker = kwargs.get('marker')
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first_index = 0
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if marker is not None:
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for (marker_index, tenant) in enumerate(tenant_refs):
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if tenant['id'] == marker:
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# we start pagination after the marker
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first_index = marker_index + 1
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break
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else:
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msg = _('Marker could not be found')
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raise exception.ValidationError(message=msg)
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limit = kwargs.get('limit')
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last_index = None
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if limit is not None:
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try:
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limit = int(limit)
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if limit < 0:
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raise AssertionError()
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except (ValueError, AssertionError):
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msg = _('Invalid limit value')
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raise exception.ValidationError(message=msg)
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last_index = first_index + limit
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tenant_refs = tenant_refs[first_index:last_index]
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for x in tenant_refs:
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if 'enabled' not in x:
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x['enabled'] = True
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o = {'tenants': tenant_refs,
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'tenants_links': []}
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return o
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@dependency.requires('policy_api', 'token_provider_api')
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class V3Controller(wsgi.Application):
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"""Base controller class for Identity API v3.
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Child classes should set the ``collection_name`` and ``member_name`` class
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attributes, representing the collection of entities they are exposing to
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the API. This is required for supporting self-referential links,
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pagination, etc.
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Class parameters:
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* `_public_parameters` - set of parameters that are exposed to the user.
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Usually used by cls.filter_params()
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"""
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collection_name = 'entities'
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member_name = 'entity'
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get_member_from_driver = None
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@classmethod
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def base_url(cls, context, path=None):
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endpoint = super(V3Controller, cls).base_url(context, 'public')
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if not path:
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path = cls.collection_name
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return '%s/%s/%s' % (endpoint, 'v3', path.lstrip('/'))
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@classmethod
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def full_url(cls, context, path=None):
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url = cls.base_url(context, path)
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if context['environment'].get('QUERY_STRING'):
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url = '%s?%s' % (url, context['environment']['QUERY_STRING'])
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return url
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@classmethod
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def query_filter_is_true(cls, filter_value):
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"""Determine if bool query param is 'True'.
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We treat this the same way as we do for policy
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enforcement:
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{bool_param}=0 is treated as False
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Any other value is considered to be equivalent to
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True, including the absence of a value
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"""
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if (isinstance(filter_value, six.string_types) and
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filter_value == '0'):
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val = False
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else:
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val = True
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return val
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@classmethod
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def _add_self_referential_link(cls, context, ref):
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ref.setdefault('links', {})
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ref['links']['self'] = cls.base_url(context) + '/' + ref['id']
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@classmethod
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def wrap_member(cls, context, ref):
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cls._add_self_referential_link(context, ref)
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return {cls.member_name: ref}
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@classmethod
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def wrap_collection(cls, context, refs, hints=None):
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"""Wrap a collection, checking for filtering and pagination.
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Returns the wrapped collection, which includes:
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- Executing any filtering not already carried out
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- Truncate to a set limit if necessary
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- Adds 'self' links in every member
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- Adds 'next', 'self' and 'prev' links for the whole collection.
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:param context: the current context, containing the original url path
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and query string
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:param refs: the list of members of the collection
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:param hints: list hints, containing any relevant filters and limit.
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Any filters already satisfied by managers will have been
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removed
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"""
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# Check if there are any filters in hints that were not
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# handled by the drivers. The driver will not have paginated or
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# limited the output if it found there were filters it was unable to
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# handle.
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if hints is not None:
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refs = cls.filter_by_attributes(refs, hints)
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list_limited, refs = cls.limit(refs, hints)
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for ref in refs:
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cls.wrap_member(context, ref)
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container = {cls.collection_name: refs}
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container['links'] = {
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'next': None,
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'self': cls.full_url(context, path=context['path']),
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'previous': None}
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if list_limited:
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container['truncated'] = True
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return container
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@classmethod
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def limit(cls, refs, hints):
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"""Limit a list of entities.
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The underlying driver layer may have already truncated the collection
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for us, but in case it was unable to handle truncation we check here.
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:param refs: the list of members of the collection
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:param hints: hints, containing, among other things, the limit
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requested
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:returns: boolean indicating whether the list was truncated, as well
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as the list of (truncated if necessary) entities.
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"""
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NOT_LIMITED = False
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LIMITED = True
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if hints is None or hints.limit is None:
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# No truncation was requested
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return NOT_LIMITED, refs
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if hints.limit.get('truncated', False):
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# The driver did truncate the list
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return LIMITED, refs
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if len(refs) > hints.limit['limit']:
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# The driver layer wasn't able to truncate it for us, so we must
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# do it here
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return LIMITED, refs[:hints.limit['limit']]
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return NOT_LIMITED, refs
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@classmethod
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def filter_by_attributes(cls, refs, hints):
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"""Filter a list of references by filter values."""
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def _attr_match(ref_attr, val_attr):
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"""Matche attributes allowing for booleans as strings.
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We test explicitly for a value that defines it as 'False',
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which also means that the existence of the attribute with
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no value implies 'True'
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"""
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if type(ref_attr) is bool:
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return ref_attr == utils.attr_as_boolean(val_attr)
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else:
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return ref_attr == val_attr
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def _inexact_attr_match(filter, ref):
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"""Apply an inexact filter to a result dict.
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:param filter: the filter in question
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:param ref: the dict to check
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:returns: True if there is a match
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"""
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comparator = filter['comparator']
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key = filter['name']
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if key in ref:
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filter_value = filter['value']
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target_value = ref[key]
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if not filter['case_sensitive']:
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# We only support inexact filters on strings so
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# it's OK to use lower()
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filter_value = filter_value.lower()
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target_value = target_value.lower()
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if comparator == 'contains':
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return (filter_value in target_value)
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elif comparator == 'startswith':
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return target_value.startswith(filter_value)
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elif comparator == 'endswith':
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return target_value.endswith(filter_value)
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else:
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# We silently ignore unsupported filters
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return True
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return False
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for filter in hints.filters:
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if filter['comparator'] == 'equals':
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attr = filter['name']
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value = filter['value']
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refs = [r for r in refs if _attr_match(
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utils.flatten_dict(r).get(attr), value)]
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else:
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# It might be an inexact filter
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refs = [r for r in refs if _inexact_attr_match(
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filter, r)]
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return refs
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@classmethod
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def build_driver_hints(cls, request, supported_filters):
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"""Build list hints based on the context query string.
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:param request: the current request
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:param supported_filters: list of filters supported, so ignore any
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keys in query_dict that are not in this list.
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"""
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hints = driver_hints.Hints()
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if not request.params:
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return hints
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for key, value in request.params.items():
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# Check if this is an exact filter
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if supported_filters is None or key in supported_filters:
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hints.add_filter(key, value)
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continue
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# Check if it is an inexact filter
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for valid_key in supported_filters:
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# See if this entry in query_dict matches a known key with an
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# inexact suffix added. If it doesn't match, then that just
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# means that there is no inexact filter for that key in this
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# query.
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if not key.startswith(valid_key + '__'):
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continue
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base_key, comparator = key.split('__', 1)
|
|
|
|
# We map the query-style inexact of, for example:
|
|
#
|
|
# {'email__contains', 'myISP'}
|
|
#
|
|
# into a list directive add filter call parameters of:
|
|
#
|
|
# name = 'email'
|
|
# value = 'myISP'
|
|
# comparator = 'contains'
|
|
# case_sensitive = True
|
|
|
|
case_sensitive = True
|
|
if comparator.startswith('i'):
|
|
case_sensitive = False
|
|
comparator = comparator[1:]
|
|
hints.add_filter(base_key, value,
|
|
comparator=comparator,
|
|
case_sensitive=case_sensitive)
|
|
|
|
# NOTE(henry-nash): If we were to support pagination, we would pull any
|
|
# pagination directives out of the query_dict here, and add them into
|
|
# the hints list.
|
|
return hints
|
|
|
|
def _require_matching_id(self, value, ref):
|
|
"""Ensure 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):
|
|
"""Generate and assigns a unique identifier to a reference."""
|
|
ref = ref.copy()
|
|
ref['id'] = uuid.uuid4().hex
|
|
return ref
|
|
|
|
def _get_domain_id_for_list_request(self, request):
|
|
"""Get the domain_id for a v3 list call.
|
|
|
|
If we running with multiple domain drivers, then the caller must
|
|
specify a domain_id either as a filter or as part of the token scope.
|
|
|
|
"""
|
|
if not CONF.identity.domain_specific_drivers_enabled:
|
|
# We don't need to specify a domain ID in this case
|
|
return
|
|
|
|
domain_id = request.params.get('domain_id')
|
|
if domain_id:
|
|
return domain_id
|
|
|
|
token_ref = authorization.get_token_ref(request.context_dict)
|
|
|
|
if token_ref.domain_scoped:
|
|
return token_ref.domain_id
|
|
elif token_ref.project_scoped:
|
|
return token_ref.project_domain_id
|
|
else:
|
|
msg = _('No domain information specified as part of list request')
|
|
LOG.warning(msg)
|
|
raise exception.Unauthorized(msg)
|
|
|
|
def _get_domain_id_from_token(self, request):
|
|
"""Get the domain_id for a v3 create call.
|
|
|
|
In the case of a v3 create entity call that does not specify a domain
|
|
ID, the spec says that we should use the domain scoping from the token
|
|
being used.
|
|
|
|
"""
|
|
# return if domain scoped
|
|
if request.context.domain_id:
|
|
return request.context.domain_id
|
|
|
|
if request.context.is_admin:
|
|
raise exception.ValidationError(
|
|
_('You have tried to create a resource using the admin '
|
|
'token. As this token is not within a domain you must '
|
|
'explicitly include a domain for this resource to '
|
|
'belong to.'))
|
|
|
|
# TODO(henry-nash): We should issue an exception here since if
|
|
# a v3 call does not explicitly specify the domain_id in the
|
|
# entity, it should be using a domain scoped token. However,
|
|
# the current tempest heat tests issue a v3 call without this.
|
|
# This is raised as bug #1283539. Once this is fixed, we
|
|
# should remove the line below and replace it with an error.
|
|
#
|
|
# Ahead of actually changing the code to raise an exception, we
|
|
# issue a deprecation warning.
|
|
versionutils.report_deprecated_feature(
|
|
LOG,
|
|
'Not specifying a domain during a create user, group or '
|
|
'project call, and relying on falling back to the '
|
|
'default domain, is deprecated as of Liberty. There is no '
|
|
'plan to remove this compatibility, however, future API '
|
|
'versions may remove this, so please specify the domain '
|
|
'explicitly or use a domain-scoped token.')
|
|
return CONF.identity.default_domain_id
|
|
|
|
def _normalize_domain_id(self, request, ref):
|
|
"""Fill in domain_id if not specified in a v3 call."""
|
|
if not ref.get('domain_id'):
|
|
ref['domain_id'] = self._get_domain_id_from_token(request)
|
|
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, request, 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.
|
|
|
|
"""
|
|
authorization.check_protection(self, request, prep_info, target_attr)
|
|
|
|
@classmethod
|
|
def filter_params(cls, ref):
|
|
"""Remove unspecified parameters from the dictionary.
|
|
|
|
This function removes unspecified parameters from the dictionary.
|
|
This method checks only root-level keys from a ref dictionary.
|
|
|
|
:param ref: a dictionary representing deserialized response to be
|
|
serialized
|
|
"""
|
|
ref_keys = set(ref.keys())
|
|
blocked_keys = ref_keys - cls._public_parameters
|
|
for blocked_param in blocked_keys:
|
|
del ref[blocked_param]
|
|
return ref
|