efbc57e593
Implemented middleware to map an incoming trusted SSL client certificate into Keystone auth credential so we can perform authorization without having to issue a token. TODO: to submit a separate patch to devstack to enable this feature. Co-authored-by: guang-yee <guang.yee@hp.com> SecurityImapct DocImpact implements bp keystone-tokenless-authz-with-x509-ssl-client-cert Change-Id: Icc7305ca9d96f8e9cdc95ccde57de650801c6544
489 lines
16 KiB
Python
489 lines
16 KiB
Python
# Copyright 2012 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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from oslo_config import cfg
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from oslo_log import log
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from oslo_utils import encodeutils
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from keystone.i18n import _, _LW
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CONF = cfg.CONF
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LOG = log.getLogger(__name__)
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# Tests use this to make exception message format errors fatal
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_FATAL_EXCEPTION_FORMAT_ERRORS = False
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class Error(Exception):
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"""Base error class.
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Child classes should define an HTTP status code, title, and a
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message_format.
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"""
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code = None
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title = None
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message_format = None
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def __init__(self, message=None, **kwargs):
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try:
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message = self._build_message(message, **kwargs)
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except KeyError:
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# if you see this warning in your logs, please raise a bug report
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if _FATAL_EXCEPTION_FORMAT_ERRORS:
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raise
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else:
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LOG.warning(_LW('missing exception kwargs (programmer error)'))
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message = self.message_format
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super(Error, self).__init__(message)
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def _build_message(self, message, **kwargs):
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"""Builds and returns an exception message.
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:raises: KeyError given insufficient kwargs
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"""
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if not message:
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try:
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message = self.message_format % kwargs
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except UnicodeDecodeError:
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try:
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kwargs = {k: encodeutils.safe_decode(v)
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for k, v in kwargs.items()}
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except UnicodeDecodeError:
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# NOTE(jamielennox): This is the complete failure case
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# at least by showing the template we have some idea
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# of where the error is coming from
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message = self.message_format
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else:
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message = self.message_format % kwargs
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return message
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class ValidationError(Error):
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message_format = _("Expecting to find %(attribute)s in %(target)s -"
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" the server could not comply with the request"
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" since it is either malformed or otherwise"
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" incorrect. The client is assumed to be in error.")
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code = 400
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title = 'Bad Request'
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class URLValidationError(ValidationError):
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message_format = _("Cannot create an endpoint with an invalid URL:"
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" %(url)s")
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class SchemaValidationError(ValidationError):
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# NOTE(lbragstad): For whole OpenStack message consistency, this error
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# message has been written in a format consistent with WSME.
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message_format = _("%(detail)s")
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class ValidationTimeStampError(Error):
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message_format = _("Timestamp not in expected format."
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" The server could not comply with the request"
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" since it is either malformed or otherwise"
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" incorrect. The client is assumed to be in error.")
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code = 400
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title = 'Bad Request'
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class ValidationExpirationError(Error):
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message_format = _("The 'expires_at' must not be before now."
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" The server could not comply with the request"
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" since it is either malformed or otherwise"
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" incorrect. The client is assumed to be in error.")
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code = 400
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title = 'Bad Request'
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class StringLengthExceeded(ValidationError):
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message_format = _("String length exceeded.The length of"
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" string '%(string)s' exceeded the limit"
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" of column %(type)s(CHAR(%(length)d)).")
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class ValidationSizeError(Error):
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message_format = _("Request attribute %(attribute)s must be"
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" less than or equal to %(size)i. The server"
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" could not comply with the request because"
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" the attribute size is invalid (too large)."
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" The client is assumed to be in error.")
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code = 400
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title = 'Bad Request'
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class CircularRegionHierarchyError(Error):
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message_format = _("The specified parent region %(parent_region_id)s "
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"would create a circular region hierarchy.")
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code = 400
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title = 'Bad Request'
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class PasswordVerificationError(Error):
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message_format = _("The password length must be less than or equal "
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"to %(size)i. The server could not comply with the "
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"request because the password is invalid.")
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code = 403
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title = 'Forbidden'
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class RegionDeletionError(Error):
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message_format = _("Unable to delete region %(region_id)s because it or "
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"its child regions have associated endpoints.")
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code = 403
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title = 'Forbidden'
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class PKITokenExpected(Error):
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message_format = _('The certificates you requested are not available. '
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'It is likely that this server does not use PKI tokens '
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'otherwise this is the result of misconfiguration.')
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code = 403
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title = 'Cannot retrieve certificates'
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class SecurityError(Error):
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"""Avoids exposing details of security failures, unless in debug mode."""
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amendment = _('(Disable debug mode to suppress these details.)')
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def _build_message(self, message, **kwargs):
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"""Only returns detailed messages in debug mode."""
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if CONF.debug:
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return _('%(message)s %(amendment)s') % {
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'message': message or self.message_format % kwargs,
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'amendment': self.amendment}
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else:
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return self.message_format % kwargs
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class Unauthorized(SecurityError):
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message_format = _("The request you have made requires authentication.")
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code = 401
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title = 'Unauthorized'
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class AuthPluginException(Unauthorized):
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message_format = _("Authentication plugin error.")
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def __init__(self, *args, **kwargs):
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super(AuthPluginException, self).__init__(*args, **kwargs)
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self.authentication = {}
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class MissingGroups(Unauthorized):
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message_format = _("Unable to find valid groups while using "
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"mapping %(mapping_id)s")
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class AuthMethodNotSupported(AuthPluginException):
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message_format = _("Attempted to authenticate with an unsupported method.")
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def __init__(self, *args, **kwargs):
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super(AuthMethodNotSupported, self).__init__(*args, **kwargs)
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self.authentication = {'methods': CONF.auth.methods}
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class AdditionalAuthRequired(AuthPluginException):
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message_format = _("Additional authentications steps required.")
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def __init__(self, auth_response=None, **kwargs):
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super(AdditionalAuthRequired, self).__init__(message=None, **kwargs)
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self.authentication = auth_response
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class Forbidden(SecurityError):
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message_format = _("You are not authorized to perform the"
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" requested action.")
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code = 403
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title = 'Forbidden'
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class ForbiddenAction(Forbidden):
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message_format = _("You are not authorized to perform the"
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" requested action: %(action)s")
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class ImmutableAttributeError(Forbidden):
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message_format = _("Could not change immutable attribute(s) "
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"'%(attributes)s' in target %(target)s")
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class CrossBackendNotAllowed(Forbidden):
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message_format = _("Group membership across backend boundaries is not "
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"allowed, group in question is %(group_id)s, "
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"user is %(user_id)s")
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class InvalidPolicyAssociation(Forbidden):
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message_format = _("Invalid mix of entities for policy association - "
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"only Endpoint, Service or Region+Service allowed. "
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"Request was - Endpoint: %(endpoint_id)s, "
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"Service: %(service_id)s, Region: %(region_id)s")
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class InvalidDomainConfig(Forbidden):
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message_format = _("Invalid domain specific configuration: %(reason)s")
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class NotFound(Error):
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message_format = _("Could not find: %(target)s")
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code = 404
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title = 'Not Found'
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class EndpointNotFound(NotFound):
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message_format = _("Could not find endpoint: %(endpoint_id)s")
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class MetadataNotFound(NotFound):
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"""(dolph): metadata is not a user-facing concept,
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so this exception should not be exposed
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"""
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message_format = _("An unhandled exception has occurred:"
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" Could not find metadata.")
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class PolicyNotFound(NotFound):
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message_format = _("Could not find policy: %(policy_id)s")
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class PolicyAssociationNotFound(NotFound):
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message_format = _("Could not find policy association")
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class RoleNotFound(NotFound):
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message_format = _("Could not find role: %(role_id)s")
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class RoleAssignmentNotFound(NotFound):
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message_format = _("Could not find role assignment with role: "
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"%(role_id)s, user or group: %(actor_id)s, "
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"project or domain: %(target_id)s")
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class RegionNotFound(NotFound):
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message_format = _("Could not find region: %(region_id)s")
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class ServiceNotFound(NotFound):
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message_format = _("Could not find service: %(service_id)s")
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class DomainNotFound(NotFound):
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message_format = _("Could not find domain: %(domain_id)s")
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class ProjectNotFound(NotFound):
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message_format = _("Could not find project: %(project_id)s")
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class InvalidParentProject(NotFound):
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message_format = _("Cannot create project with parent: %(project_id)s")
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class TokenNotFound(NotFound):
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message_format = _("Could not find token: %(token_id)s")
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class UserNotFound(NotFound):
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message_format = _("Could not find user: %(user_id)s")
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class GroupNotFound(NotFound):
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message_format = _("Could not find group: %(group_id)s")
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class MappingNotFound(NotFound):
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message_format = _("Could not find mapping: %(mapping_id)s")
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class TrustNotFound(NotFound):
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message_format = _("Could not find trust: %(trust_id)s")
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class TrustUseLimitReached(Forbidden):
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message_format = _("No remaining uses for trust: %(trust_id)s")
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class CredentialNotFound(NotFound):
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message_format = _("Could not find credential: %(credential_id)s")
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class VersionNotFound(NotFound):
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message_format = _("Could not find version: %(version)s")
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class EndpointGroupNotFound(NotFound):
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message_format = _("Could not find Endpoint Group: %(endpoint_group_id)s")
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class IdentityProviderNotFound(NotFound):
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message_format = _("Could not find Identity Provider: %(idp_id)s")
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class ServiceProviderNotFound(NotFound):
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message_format = _("Could not find Service Provider: %(sp_id)s")
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class FederatedProtocolNotFound(NotFound):
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message_format = _("Could not find federated protocol %(protocol_id)s for"
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" Identity Provider: %(idp_id)s")
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class PublicIDNotFound(NotFound):
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# This is used internally and mapped to either User/GroupNotFound or,
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# Assertion before the exception leaves Keystone.
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message_format = "%(id)s"
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class DomainConfigNotFound(NotFound):
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message_format = _('Could not find %(group_or_option)s in domain '
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'configuration for domain %(domain_id)s')
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class Conflict(Error):
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message_format = _("Conflict occurred attempting to store %(type)s -"
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" %(details)s")
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code = 409
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title = 'Conflict'
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class UnexpectedError(SecurityError):
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"""Avoids exposing details of failures, unless in debug mode."""
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_message_format = _("An unexpected error prevented the server "
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"from fulfilling your request.")
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debug_message_format = _("An unexpected error prevented the server "
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"from fulfilling your request: %(exception)s")
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@property
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def message_format(self):
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"""Return the generic message format string unless debug is enabled."""
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if CONF.debug:
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return self.debug_message_format
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return self._message_format
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def _build_message(self, message, **kwargs):
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if CONF.debug and 'exception' not in kwargs:
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# Ensure that exception has a value to be extra defensive for
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# substitutions and make sure the exception doesn't raise an
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# exception.
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kwargs['exception'] = ''
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return super(UnexpectedError, self)._build_message(message, **kwargs)
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code = 500
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title = 'Internal Server Error'
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class TrustConsumeMaximumAttempt(UnexpectedError):
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debug_message_format = _("Unable to consume trust %(trust_id)s, unable to "
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"acquire lock.")
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class CertificateFilesUnavailable(UnexpectedError):
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debug_message_format = _("Expected signing certificates are not available "
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"on the server. Please check Keystone "
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"configuration.")
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class MalformedEndpoint(UnexpectedError):
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debug_message_format = _("Malformed endpoint URL (%(endpoint)s),"
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" see ERROR log for details.")
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class MappedGroupNotFound(UnexpectedError):
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debug_message_format = _("Group %(group_id)s returned by mapping "
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"%(mapping_id)s was not found in the backend.")
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class MetadataFileError(UnexpectedError):
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message_format = _("Error while reading metadata file, %(reason)s")
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class AssignmentTypeCalculationError(UnexpectedError):
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message_format = _(
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'Unexpected combination of grant attributes - '
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'User: %(user_id)s, Group: %(group_id)s, Project: %(project_id)s, '
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'Domain: %(domain_id)s')
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class NotImplemented(Error):
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message_format = _("The action you have requested has not"
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" been implemented.")
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code = 501
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title = 'Not Implemented'
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class Gone(Error):
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message_format = _("The service you have requested is no"
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" longer available on this server.")
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code = 410
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title = 'Gone'
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class ConfigFileNotFound(UnexpectedError):
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debug_message_format = _("The Keystone configuration file %(config_file)s "
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"could not be found.")
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class KeysNotFound(UnexpectedError):
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message_format = _('No encryption keys found; run keystone-manage '
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'fernet_setup to bootstrap one.')
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class MultipleSQLDriversInConfig(UnexpectedError):
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message_format = _('The Keystone domain-specific configuration has '
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'specified more than one SQL driver (only one is '
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'permitted): %(source)s.')
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class MigrationNotProvided(Exception):
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def __init__(self, mod_name, path):
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super(MigrationNotProvided, self).__init__(_(
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"%(mod_name)s doesn't provide database migrations. The migration"
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" repository path at %(path)s doesn't exist or isn't a directory."
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) % {'mod_name': mod_name, 'path': path})
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class UnsupportedTokenVersionException(UnexpectedError):
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message_format = _('Token version is unrecognizable or '
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'unsupported.')
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class SAMLSigningError(UnexpectedError):
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debug_message_format = _('Unable to sign SAML assertion. It is likely '
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'that this server does not have xmlsec1 '
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'installed, or this is the result of '
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'misconfiguration. Reason %(reason)s')
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title = 'Error signing SAML assertion'
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class OAuthHeadersMissingError(UnexpectedError):
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debug_message_format = _('No Authorization headers found, cannot proceed '
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'with OAuth related calls, if running under '
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'HTTPd or Apache, ensure WSGIPassAuthorization '
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'is set to On.')
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title = 'Error retrieving OAuth headers'
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class TokenlessAuthConfigError(ValidationError):
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message_format = _('Could not determine Identity Provider ID. The '
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'configuration option %(issuer_attribute)s '
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'was not found in the request environment.')
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