OpenStack Identity (Keystone)
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# Copyright 2012 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 http.client
from oslo_log import log
from oslo_utils import encodeutils
import keystone.conf
from keystone.i18n import _
CONF = keystone.conf.CONF
LOG = log.getLogger(__name__)
KEYSTONE_API_EXCEPTIONS = set([])
# Tests use this to make exception message format errors fatal
_FATAL_EXCEPTION_FORMAT_ERRORS = False
def _format_with_unicode_kwargs(msg_format, kwargs):
try:
return msg_format % kwargs
except UnicodeDecodeError:
try:
kwargs = {k: encodeutils.safe_decode(v)
for k, v in kwargs.items()}
except UnicodeDecodeError:
# NOTE(jamielennox): This is the complete failure case
# at least by showing the template we have some idea
# of where the error is coming from
return msg_format
return msg_format % kwargs
class _KeystoneExceptionMeta(type):
"""Automatically Register the Exceptions in 'KEYSTONE_API_EXCEPTIONS' list.
The `KEYSTONE_API_EXCEPTIONS` list is utilized by flask to register a
handler to emit sane details when the exception occurs.
"""
def __new__(mcs, name, bases, class_dict):
"""Create a new instance and register with KEYSTONE_API_EXCEPTIONS."""
cls = type.__new__(mcs, name, bases, class_dict)
KEYSTONE_API_EXCEPTIONS.add(cls)
return cls
class Error(Exception, metaclass=_KeystoneExceptionMeta):
"""Base error class.
Child classes should define an HTTP status code, title, and a
message_format.
"""
code = None
title = None
message_format = None
def __init__(self, message=None, **kwargs):
try:
message = self._build_message(message, **kwargs)
except KeyError:
# if you see this warning in your logs, please raise a bug report
if _FATAL_EXCEPTION_FORMAT_ERRORS:
raise
else:
LOG.warning('missing exception kwargs (programmer error)')
message = self.message_format
super(Error, self).__init__(message)
def _build_message(self, message, **kwargs):
"""Build and returns an exception message.
:raises KeyError: given insufficient kwargs
"""
if message:
return message
return _format_with_unicode_kwargs(self.message_format, kwargs)
class ValidationError(Error):
message_format = _("Expecting to find %(attribute)s in %(target)s."
" The server could not comply with the request"
" since it is either malformed or otherwise"
" incorrect. The client is assumed to be in error.")
code = int(http.client.BAD_REQUEST)
title = http.client.responses[http.client.BAD_REQUEST]
class URLValidationError(ValidationError):
message_format = _("Cannot create an endpoint with an invalid URL:"
" %(url)s.")
class PasswordValidationError(ValidationError):
message_format = _("Password validation error: %(detail)s.")
class PasswordRequirementsValidationError(PasswordValidationError):
message_format = _("The password does not match the requirements:"
" %(detail)s.")
class PasswordHistoryValidationError(PasswordValidationError):
message_format = _("The new password cannot be identical to a "
"previous password. The total number which "
"includes the new password must be unique is "
"%(unique_count)s.")
class PasswordAgeValidationError(PasswordValidationError):
message_format = _("You cannot change your password at this time due "
"to the minimum password age. Once you change your "
"password, it must be used for %(min_age_days)d day(s) "
"before it can be changed. Please try again in "
"%(days_left)d day(s) or contact your administrator to "
"reset your password.")
class PasswordSelfServiceDisabled(PasswordValidationError):
message_format = _("You cannot change your password at this time due "
"to password policy disallowing password changes. "
"Please contact your administrator to reset your "
"password.")
class SchemaValidationError(ValidationError):
# NOTE(lbragstad): For whole OpenStack message consistency, this error
# message has been written in a format consistent with WSME.
message_format = _("%(detail)s")
class ValidationTimeStampError(Error):
message_format = _("Timestamp not in expected format."
" The server could not comply with the request"
" since it is either malformed or otherwise"
" incorrect. The client is assumed to be in error.")
code = int(http.client.BAD_REQUEST)
title = http.client.responses[http.client.BAD_REQUEST]
class InvalidOperatorError(ValidationError):
message_format = _("The given operator %(_op)s is not valid."
" It must be one of the following:"
" 'eq', 'neq', 'lt', 'lte', 'gt', or 'gte'.")
class ValidationExpirationError(Error):
message_format = _("The 'expires_at' must not be before now."
" The server could not comply with the request"
" since it is either malformed or otherwise"
" incorrect. The client is assumed to be in error.")
code = int(http.client.BAD_REQUEST)
title = http.client.responses[http.client.BAD_REQUEST]
class StringLengthExceeded(ValidationError):
message_format = _("String length exceeded. The length of"
" string '%(string)s' exceeds the limit"
" of column %(type)s(CHAR(%(length)d)).")
class AmbiguityError(ValidationError):
message_format = _("There are multiple %(resource)s entities named"
" '%(name)s'. Please use ID instead of names to"
" resolve the ambiguity.")
class ApplicationCredentialValidationError(ValidationError):
message_format = _("Invalid application credential: %(detail)s")
class CircularRegionHierarchyError(Error):
message_format = _("The specified parent region %(parent_region_id)s "
"would create a circular region hierarchy.")
code = int(http.client.BAD_REQUEST)
title = http.client.responses[http.client.BAD_REQUEST]
class ForbiddenNotSecurity(Error):
"""When you want to return a 403 Forbidden response but not security.
Use this for errors where the message is always safe to present to the user
and won't give away extra information.
"""
code = int(http.client.FORBIDDEN)
title = http.client.responses[http.client.FORBIDDEN]
class PasswordVerificationError(ForbiddenNotSecurity):
message_format = _("The password length must be less than or equal "
"to %(size)i. The server could not comply with the "
"request because the password is invalid.")
class RegionDeletionError(ForbiddenNotSecurity):
message_format = _("Unable to delete region %(region_id)s because it or "
"its child regions have associated endpoints.")
class ApplicationCredentialLimitExceeded(ForbiddenNotSecurity):
message_format = _("Unable to create additional application credentials, "
"maximum of %(limit)d already exceeded for user.")
class SecurityError(Error):
"""Security error exception.
Avoids exposing details of security errors, unless in insecure_debug mode.
"""
amendment = _('(Disable insecure_debug mode to suppress these details.)')
def __deepcopy__(self):
"""Override the default deepcopy.
Keystone :class:`keystone.exception.Error` accepts an optional message
that will be used when rendering the exception object as a string. If
not provided the object's message_format attribute is used instead.
:class:`keystone.exception.SecurityError` is a little different in
that it only uses the message provided to the initializer when
keystone is in `insecure_debug` mode. Instead it will use its
`message_format`. This is to ensure that sensitive details are not
leaked back to the caller in a production deployment.
This dual mode for string rendering causes some odd behaviour when
combined with oslo_i18n translation. Any object used as a value for
formatting a translated string is deep copied.
The copy causes an issue. The deep copy process actually creates a new
exception instance with the rendered string. Then when that new
instance is rendered as a string to use for substitution a warning is
logged. This is because the code tries to use the `message_format` in
secure mode, but the required kwargs are not in the deep copy.
The end result is not an error because when the KeyError is caught the
instance's ``message`` is used instead and this has the properly
translated message. The only indication that something is wonky is a
message in the warning log.
"""
return self
def _build_message(self, message, **kwargs):
"""Only returns detailed messages in insecure_debug mode."""
if message and CONF.insecure_debug:
if isinstance(message, str):
# Only do replacement if message is string. The message is
# sometimes a different exception or bytes, which would raise
# TypeError.
message = _format_with_unicode_kwargs(message, kwargs)
return _('%(message)s %(amendment)s') % {
'message': message,
'amendment': self.amendment}
return _format_with_unicode_kwargs(self.message_format, kwargs)
class Unauthorized(SecurityError):
message_format = _("The request you have made requires authentication.")
code = int(http.client.UNAUTHORIZED)
title = http.client.responses[http.client.UNAUTHORIZED]
class InsufficientAuthMethods(Error):
# NOTE(adriant): This is an internal only error that is built into
# an auth receipt response.
message_format = _("Insufficient auth methods received for %(user_id)s. "
"Auth Methods Provided: %(methods)s.")
code = 401
title = 'Unauthorized'
def __init__(self, message=None, user_id=None, methods=None):
methods_str = '[%s]' % ','.join(methods)
super(InsufficientAuthMethods, self).__init__(
message, user_id=user_id, methods=methods_str)
self.user_id = user_id
self.methods = methods
class ReceiptNotFound(Unauthorized):
message_format = _("Could not find auth receipt: %(receipt_id)s.")
class PasswordExpired(Unauthorized):
message_format = _("The password is expired and needs to be changed for "
"user: %(user_id)s.")
class AuthPluginException(Unauthorized):
message_format = _("Authentication plugin error.")
def __init__(self, *args, **kwargs):
super(AuthPluginException, self).__init__(*args, **kwargs)
self.authentication = {}
class UserDisabled(Unauthorized):
message_format = _("The account is disabled for user: %(user_id)s.")
class AccountLocked(Unauthorized):
message_format = _("The account is locked for user: %(user_id)s.")
class AuthMethodNotSupported(AuthPluginException):
message_format = _("Attempted to authenticate with an unsupported method.")
def __init__(self, *args, **kwargs):
super(AuthMethodNotSupported, self).__init__(*args, **kwargs)
self.authentication = {'methods': CONF.auth.methods}
class ApplicationCredentialAuthError(AuthPluginException):
message_format = _(
"Error authenticating with application credential: %(detail)s")
class AdditionalAuthRequired(AuthPluginException):
message_format = _("Additional authentications steps required.")
def __init__(self, auth_response=None, **kwargs):
super(AdditionalAuthRequired, self).__init__(message=None, **kwargs)
self.authentication = auth_response
class Forbidden(SecurityError):
message_format = _("You are not authorized to perform the"
" requested action.")
code = int(http.client.FORBIDDEN)
title = http.client.responses[http.client.FORBIDDEN]
class ForbiddenAction(Forbidden):
message_format = _("You are not authorized to perform the"
" requested action: %(action)s.")
class CrossBackendNotAllowed(Forbidden):
message_format = _("Group membership across backend boundaries is not "
"allowed. Group in question is %(group_id)s, "
"user is %(user_id)s.")
class InvalidPolicyAssociation(Forbidden):
message_format = _("Invalid mix of entities for policy association: "
"only Endpoint, Service, or Region+Service allowed. "
"Request was - Endpoint: %(endpoint_id)s, "
"Service: %(service_id)s, Region: %(region_id)s.")
class InvalidDomainConfig(Forbidden):
message_format = _("Invalid domain specific configuration: %(reason)s.")
class InvalidLimit(Forbidden):
message_format = _("Invalid resource limit: %(reason)s.")
class LimitTreeExceedError(Exception):
def __init__(self, project_id, max_limit_depth):
super(LimitTreeExceedError, self).__init__(_(
"Keystone cannot start due to project hierarchical depth in the "
"current deployment (project_ids: %(project_id)s) exceeds the "
"enforcement model's maximum limit of %(max_limit_depth)s. Please "
"use a different enforcement model to correct the issue."
) % {'project_id': project_id, 'max_limit_depth': max_limit_depth})
class NotFound(Error):
message_format = _("Could not find: %(target)s.")
code = int(http.client.NOT_FOUND)
title = http.client.responses[http.client.NOT_FOUND]
class EndpointNotFound(NotFound):
message_format = _("Could not find endpoint: %(endpoint_id)s.")
class PolicyNotFound(NotFound):
message_format = _("Could not find policy: %(policy_id)s.")
class PolicyAssociationNotFound(NotFound):
message_format = _("Could not find policy association.")
class RoleNotFound(NotFound):
message_format = _("Could not find role: %(role_id)s.")
class ImpliedRoleNotFound(NotFound):
message_format = _("%(prior_role_id)s does not imply %(implied_role_id)s.")
class InvalidImpliedRole(Forbidden):
message_format = _("%(role_id)s cannot be an implied roles.")
class DomainSpecificRoleMismatch(Forbidden):
message_format = _("Project %(project_id)s must be in the same domain "
"as the role %(role_id)s being assigned.")
class DomainSpecificRoleNotWithinIdPDomain(Forbidden):
message_format = _("role: %(role_name)s must be within the same domain as "
"the identity provider: %(identity_provider)s.")
class DomainIdInvalid(ValidationError):
message_format = _("Domain ID does not conform to required UUID format.")
class RoleAssignmentNotFound(NotFound):
message_format = _("Could not find role assignment with role: "
"%(role_id)s, user or group: %(actor_id)s, "
"project, domain, or system: %(target_id)s.")
class RegionNotFound(NotFound):
message_format = _("Could not find region: %(region_id)s.")
class ServiceNotFound(NotFound):
message_format = _("Could not find service: %(service_id)s.")
class DomainNotFound(NotFound):
message_format = _("Could not find domain: %(domain_id)s.")
class ProjectNotFound(NotFound):
message_format = _("Could not find project: %(project_id)s.")
class ProjectTagNotFound(NotFound):
message_format = _("Could not find project tag: %(project_tag)s.")
class TokenNotFound(NotFound):
message_format = _("Could not find token: %(token_id)s.")
class UserNotFound(NotFound):
message_format = _("Could not find user: %(user_id)s.")
class GroupNotFound(NotFound):
message_format = _("Could not find group: %(group_id)s.")
class MappingNotFound(NotFound):
message_format = _("Could not find mapping: %(mapping_id)s.")
class TrustNotFound(NotFound):
message_format = _("Could not find trust: %(trust_id)s.")
class TrustUseLimitReached(Forbidden):
message_format = _("No remaining uses for trust: %(trust_id)s.")
class CredentialNotFound(NotFound):
message_format = _("Could not find credential: %(credential_id)s.")
class VersionNotFound(NotFound):
message_format = _("Could not find version: %(version)s.")
class EndpointGroupNotFound(NotFound):
message_format = _("Could not find Endpoint Group: %(endpoint_group_id)s.")
class IdentityProviderNotFound(NotFound):
message_format = _("Could not find Identity Provider: %(idp_id)s.")
class ServiceProviderNotFound(NotFound):
message_format = _("Could not find Service Provider: %(sp_id)s.")
class FederatedProtocolNotFound(NotFound):
message_format = _("Could not find federated protocol %(protocol_id)s for"
" Identity Provider: %(idp_id)s.")
class PublicIDNotFound(NotFound):
# This is used internally and mapped to either User/GroupNotFound or,
# Assertion before the exception leaves Keystone.
message_format = "%(id)s"
class RegisteredLimitNotFound(NotFound):
message_format = _("Could not find registered limit for %(id)s.")
class LimitNotFound(NotFound):
message_format = _("Could not find limit for %(id)s.")
class NoLimitReference(Forbidden):
message_format = _("Unable to create a limit that has no corresponding "
"registered limit.")
class RegisteredLimitError(ForbiddenNotSecurity):
message_format = _("Unable to update or delete registered limit %(id)s "
"because there are project limits associated with it.")
class DomainConfigNotFound(NotFound):
message_format = _('Could not find %(group_or_option)s in domain '
'configuration for domain %(domain_id)s.')
class ConfigRegistrationNotFound(Exception):
# This is used internally between the domain config backend and the
# manager, so should not escape to the client. If it did, it is a coding
# error on our part, and would end up, appropriately, as a 500 error.
pass
class ApplicationCredentialNotFound(NotFound):
message_format = _("Could not find Application Credential: "
"%(application_credential_id)s.")
class AccessRuleNotFound(NotFound):
message_format = _("Could not find Access Rule: %(access_rule_id)s.")
class Conflict(Error):
message_format = _("Conflict occurred attempting to store %(type)s -"
" %(details)s.")
code = int(http.client.CONFLICT)
title = http.client.responses[http.client.CONFLICT]
class UnexpectedError(SecurityError):
"""Avoids exposing details of failures, unless in insecure_debug mode."""
message_format = _("An unexpected error prevented the server "
"from fulfilling your request.")
debug_message_format = _("An unexpected error prevented the server "
"from fulfilling your request: %(exception)s.")
def _build_message(self, message, **kwargs):
# Ensure that exception has a value to be extra defensive for
# substitutions and make sure the exception doesn't raise an
# exception.
kwargs.setdefault('exception', '')
return super(UnexpectedError, self)._build_message(
message or self.debug_message_format, **kwargs)
code = int(http.client.INTERNAL_SERVER_ERROR)
title = http.client.responses[http.client.INTERNAL_SERVER_ERROR]
class TrustConsumeMaximumAttempt(UnexpectedError):
debug_message_format = _("Unable to consume trust %(trust_id)s. Unable to "
"acquire lock.")
class MalformedEndpoint(UnexpectedError):
debug_message_format = _("Malformed endpoint URL (%(endpoint)s),"
" see ERROR log for details.")
class MappedGroupNotFound(UnexpectedError):
debug_message_format = _("Group %(group_id)s returned by mapping "
"%(mapping_id)s was not found in the backend.")
class MetadataFileError(UnexpectedError):
debug_message_format = _("Error while reading metadata file: %(reason)s.")
class DirectMappingError(UnexpectedError):
debug_message_format = _("Local section in mapping %(mapping_id)s refers "
"to a remote match that doesn't exist "
"(e.g. {0} in a local section).")
class AssignmentTypeCalculationError(UnexpectedError):
debug_message_format = _(
'Unexpected combination of grant attributes - '
'User: %(user_id)s, Group: %(group_id)s, Project: %(project_id)s, '
'Domain: %(domain_id)s.')
class NotImplemented(Error):
message_format = _("The action you have requested has not"
" been implemented.")
code = int(http.client.NOT_IMPLEMENTED)
title = http.client.responses[http.client.NOT_IMPLEMENTED]
class Gone(Error):
message_format = _("The service you have requested is no"
" longer available on this server.")
code = int(http.client.GONE)
title = http.client.responses[http.client.GONE]
class ConfigFileNotFound(UnexpectedError):
debug_message_format = _("The Keystone configuration file %(config_file)s "
"could not be found.")
class KeysNotFound(UnexpectedError):
debug_message_format = _('No encryption keys found; run keystone-manage '
'fernet_setup to bootstrap one.')
class MultipleSQLDriversInConfig(UnexpectedError):
debug_message_format = _('The Keystone domain-specific configuration has '
'specified more than one SQL driver (only one is '
'permitted): %(source)s.')
class MigrationNotProvided(Exception):
def __init__(self, mod_name, path):
super(MigrationNotProvided, self).__init__(_(
"%(mod_name)s doesn't provide database migrations. The migration"
" repository path at %(path)s doesn't exist or isn't a directory."
) % {'mod_name': mod_name, 'path': path})
class UnsupportedTokenVersionException(UnexpectedError):
debug_message_format = _('Token version is unrecognizable or '
'unsupported.')
class SAMLSigningError(UnexpectedError):
debug_message_format = _('Unable to sign SAML assertion. It is likely '
'that this server does not have xmlsec1 '
'installed or this is the result of '
'misconfiguration. Reason %(reason)s.')
class OAuthHeadersMissingError(UnexpectedError):
debug_message_format = _('No Authorization headers found, cannot proceed '
'with OAuth related calls. If running under '
'HTTPd or Apache, ensure WSGIPassAuthorization '
'is set to On.')
class TokenlessAuthConfigError(ValidationError):
message_format = _('Could not determine Identity Provider ID. The '
'configuration option %(issuer_attribute)s '
'was not found in the request environment.')
class CredentialEncryptionError(Exception):
message_format = _("An unexpected error prevented the server "
"from accessing encrypted credentials.")
class LDAPServerConnectionError(UnexpectedError):
debug_message_format = _('Unable to establish a connection to '
'LDAP Server (%(url)s).')
class LDAPInvalidCredentialsError(UnexpectedError):
message_format = _('Unable to authenticate against Identity backend - '
'Invalid username or password')
class LDAPSizeLimitExceeded(UnexpectedError):
message_format = _('Number of User/Group entities returned by LDAP '
'exceeded size limit. Contact your LDAP '
'administrator.')
class CacheDeserializationError(Exception):
def __init__(self, obj, data):
super(CacheDeserializationError, self).__init__(
_('Failed to deserialize %(obj)s. Data is %(data)s') % {
'obj': obj, 'data': data
}
)
class ResourceUpdateForbidden(ForbiddenNotSecurity):
message_format = _('Unable to update immutable %(type)s resource: '
'`%(resource_id)s. Set resource option "immutable" '
'to false first.')
class ResourceDeleteForbidden(ForbiddenNotSecurity):
message_format = _('Unable to delete immutable %(type)s resource: '
'`%(resource_id)s. Set resource option "immutable" '
'to false first.')