730 lines
29 KiB
Python
730 lines
29 KiB
Python
import json
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import subprocess
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import uuid
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from keystone.common import cms
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from keystone.common import controller
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from keystone.common import dependency
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from keystone.common import logging
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from keystone.common import utils
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from keystone import config
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from keystone import exception
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from keystone.openstack.common import timeutils
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from keystone.token import core
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CONF = config.CONF
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LOG = logging.getLogger(__name__)
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DEFAULT_DOMAIN_ID = CONF.identity.default_domain_id
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class ExternalAuthNotApplicable(Exception):
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"""External authentication is not applicable"""
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pass
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@dependency.requires('catalog_api', 'trust_api', 'token_api')
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class Auth(controller.V2Controller):
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def ca_cert(self, context, auth=None):
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ca_file = open(CONF.signing.ca_certs, 'r')
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data = ca_file.read()
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ca_file.close()
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return data
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def signing_cert(self, context, auth=None):
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cert_file = open(CONF.signing.certfile, 'r')
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data = cert_file.read()
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cert_file.close()
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return data
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def authenticate(self, context, auth=None):
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"""Authenticate credentials and return a token.
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Accept auth as a dict that looks like::
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{
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"auth":{
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"passwordCredentials":{
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"username":"test_user",
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"password":"mypass"
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},
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"tenantName":"customer-x"
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}
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}
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In this case, tenant is optional, if not provided the token will be
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considered "unscoped" and can later be used to get a scoped token.
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Alternatively, this call accepts auth with only a token and tenant
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that will return a token that is scoped to that tenant.
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"""
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if auth is None:
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raise exception.ValidationError(attribute='auth',
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target='request body')
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auth_token_data = None
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if "token" in auth:
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# Try to authenticate using a token
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auth_info = self._authenticate_token(
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context, auth)
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else:
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# Try external authentication
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try:
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auth_info = self._authenticate_external(
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context, auth)
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except ExternalAuthNotApplicable:
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# Try local authentication
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auth_info = self._authenticate_local(
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context, auth)
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user_ref, tenant_ref, metadata_ref, expiry = auth_info
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core.validate_auth_info(self, context, user_ref, tenant_ref)
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trust_id = metadata_ref.get('trust_id')
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user_ref = self._filter_domain_id(user_ref)
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if tenant_ref:
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tenant_ref = self._filter_domain_id(tenant_ref)
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auth_token_data = self._get_auth_token_data(user_ref,
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tenant_ref,
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metadata_ref,
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expiry)
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if tenant_ref:
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catalog_ref = self.catalog_api.get_catalog(
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context=context,
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user_id=user_ref['id'],
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tenant_id=tenant_ref['id'],
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metadata=metadata_ref)
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else:
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catalog_ref = {}
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auth_token_data['id'] = 'placeholder'
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roles_ref = []
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for role_id in metadata_ref.get('roles', []):
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role_ref = self.identity_api.get_role(context, role_id)
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roles_ref.append(dict(name=role_ref['name']))
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token_data = Auth.format_token(auth_token_data, roles_ref)
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service_catalog = Auth.format_catalog(catalog_ref)
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token_data['access']['serviceCatalog'] = service_catalog
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if CONF.signing.token_format == 'UUID':
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token_id = uuid.uuid4().hex
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elif CONF.signing.token_format == 'PKI':
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try:
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token_id = cms.cms_sign_token(json.dumps(token_data),
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CONF.signing.certfile,
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CONF.signing.keyfile)
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except subprocess.CalledProcessError:
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raise exception.UnexpectedError(_(
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'Unable to sign token.'))
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else:
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raise exception.UnexpectedError(_(
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'Invalid value for token_format: %s.'
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' Allowed values are PKI or UUID.') %
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CONF.signing.token_format)
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try:
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self.token_api.create_token(
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context, token_id, dict(key=token_id,
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id=token_id,
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expires=auth_token_data['expires'],
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user=user_ref,
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tenant=tenant_ref,
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metadata=metadata_ref,
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trust_id=trust_id))
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except Exception as e:
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# an identical token may have been created already.
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# if so, return the token_data as it is also identical
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try:
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self.token_api.get_token(context=context,
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token_id=token_id)
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except exception.TokenNotFound:
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raise e
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token_data['access']['token']['id'] = token_id
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return token_data
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def _authenticate_token(self, context, auth):
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"""Try to authenticate using an already existing token.
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Returns auth_token_data, (user_ref, tenant_ref, metadata_ref)
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"""
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if 'token' not in auth:
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raise exception.ValidationError(
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attribute='token', target='auth')
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if "id" not in auth['token']:
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raise exception.ValidationError(
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attribute="id", target="token")
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old_token = auth['token']['id']
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if len(old_token) > CONF.max_token_size:
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raise exception.ValidationSizeError(attribute='token',
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size=CONF.max_token_size)
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try:
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old_token_ref = self.token_api.get_token(context=context,
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token_id=old_token)
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except exception.NotFound as e:
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raise exception.Unauthorized(e)
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#A trust token cannot be used to get another token
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if 'trust' in old_token_ref:
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raise exception.Forbidden()
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if 'trust_id' in old_token_ref['metadata']:
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raise exception.Forbidden()
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user_ref = old_token_ref['user']
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user_id = user_ref['id']
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if not CONF.trust.enabled and 'trust_id' in auth:
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raise exception.Forbidden('Trusts are disabled.')
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elif CONF.trust.enabled and 'trust_id' in auth:
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trust_ref = self.trust_api.get_trust(context, auth['trust_id'])
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if trust_ref is None:
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raise exception.Forbidden()
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if user_id != trust_ref['trustee_user_id']:
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raise exception.Forbidden()
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if ('expires' in trust_ref) and (trust_ref['expires']):
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expiry = trust_ref['expires']
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if expiry < timeutils.parse_isotime(timeutils.isotime()):
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raise exception.Forbidden()()
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user_id = trust_ref['trustor_user_id']
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trustor_user_ref = (self.identity_api.get_user(
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context=context,
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user_id=trust_ref['trustor_user_id']))
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if not trustor_user_ref['enabled']:
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raise exception.Forbidden()()
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trustee_user_ref = self.identity_api.get_user(
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context, trust_ref['trustee_user_id'])
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if not trustee_user_ref['enabled']:
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raise exception.Forbidden()()
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if trust_ref['impersonation'] == 'True':
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current_user_ref = trustor_user_ref
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else:
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current_user_ref = trustee_user_ref
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else:
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current_user_ref = self.identity_api.get_user(context=context,
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user_id=user_id)
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tenant_id = self._get_project_id_from_auth(context, auth)
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tenant_ref = self._get_project_ref(context, user_id, tenant_id)
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metadata_ref = self._get_metadata_ref(context, user_id, tenant_id)
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# TODO (henry-nash) If no tenant was specified, instead check
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# for a domain and find any related user/group roles
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self._append_roles(metadata_ref,
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self._get_group_metadata_ref(
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context, user_id, tenant_id))
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expiry = old_token_ref['expires']
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if CONF.trust.enabled and 'trust_id' in auth:
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trust_id = auth['trust_id']
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trust_roles = []
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for role in trust_ref['roles']:
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if not 'roles' in metadata_ref:
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raise exception.Forbidden()()
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if role['id'] in metadata_ref['roles']:
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trust_roles.append(role['id'])
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else:
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raise exception.Forbidden()
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if 'expiry' in trust_ref and trust_ref['expiry']:
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trust_expiry = timeutils.parse_isotime(trust_ref['expiry'])
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if trust_expiry < expiry:
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expiry = trust_expiry
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metadata_ref['roles'] = trust_roles
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metadata_ref['trustee_user_id'] = trust_ref['trustee_user_id']
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metadata_ref['trust_id'] = trust_id
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auth_token_data = self._get_auth_token_data(current_user_ref,
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tenant_ref,
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metadata_ref,
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expiry)
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return (current_user_ref, tenant_ref, metadata_ref, expiry)
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def _authenticate_local(self, context, auth):
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"""Try to authenticate against the identity backend.
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Returns auth_token_data, (user_ref, tenant_ref, metadata_ref)
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"""
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if 'passwordCredentials' not in auth:
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raise exception.ValidationError(
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attribute='passwordCredentials', target='auth')
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if "password" not in auth['passwordCredentials']:
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raise exception.ValidationError(
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attribute='password', target='passwordCredentials')
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password = auth['passwordCredentials']['password']
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max_pw_size = utils.MAX_PASSWORD_LENGTH
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if password and len(password) > max_pw_size:
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raise exception.ValidationSizeError(attribute='password',
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size=max_pw_size)
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if ("userId" not in auth['passwordCredentials'] and
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"username" not in auth['passwordCredentials']):
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raise exception.ValidationError(
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attribute='username or userId',
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target='passwordCredentials')
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user_id = auth['passwordCredentials'].get('userId', None)
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if user_id and len(user_id) > CONF.max_param_size:
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raise exception.ValidationSizeError(attribute='userId',
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size=CONF.max_param_size)
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username = auth['passwordCredentials'].get('username', '')
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if len(username) > CONF.max_param_size:
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raise exception.ValidationSizeError(attribute='username',
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size=CONF.max_param_size)
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if username:
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try:
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user_ref = self.identity_api.get_user_by_name(
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context=context, user_name=username,
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domain_id=DEFAULT_DOMAIN_ID)
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user_id = user_ref['id']
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except exception.UserNotFound as e:
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raise exception.Unauthorized(e)
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tenant_id = self._get_project_id_from_auth(context, auth)
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try:
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auth_info = self.identity_api.authenticate(
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context=context,
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user_id=user_id,
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password=password,
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tenant_id=tenant_id)
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except AssertionError as e:
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raise exception.Unauthorized(e)
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(user_ref, tenant_ref, metadata_ref) = auth_info
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# By now we will have authorized and if a tenant/project was
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# specified, we will have obtained its metadata. In this case
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# we just need to add in any group roles.
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#
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# TODO (henry-nash) If no tenant was specified, instead check
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# for a domain and find any related user/group roles
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self._append_roles(metadata_ref,
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self._get_group_metadata_ref(
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context, user_id, tenant_id))
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expiry = core.default_expire_time()
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return (user_ref, tenant_ref, metadata_ref, expiry)
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def _authenticate_external(self, context, auth):
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"""Try to authenticate an external user via REMOTE_USER variable.
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Returns auth_token_data, (user_ref, tenant_ref, metadata_ref)
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"""
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if 'REMOTE_USER' not in context:
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raise ExternalAuthNotApplicable()
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username = context['REMOTE_USER']
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try:
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user_ref = self.identity_api.get_user_by_name(
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context=context, user_name=username,
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domain_id=DEFAULT_DOMAIN_ID)
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user_id = user_ref['id']
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except exception.UserNotFound as e:
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raise exception.Unauthorized(e)
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tenant_id = self._get_project_id_from_auth(context, auth)
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tenant_ref = self._get_project_ref(context, user_id, tenant_id)
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metadata_ref = self._get_metadata_ref(context, user_id, tenant_id)
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# TODO (henry-nash) If no tenant was specified, instead check
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# for a domain and find any related user/group roles
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self._append_roles(metadata_ref,
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self._get_group_metadata_ref(
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context, user_id, tenant_id))
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expiry = core.default_expire_time()
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return (user_ref, tenant_ref, metadata_ref, expiry)
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def _get_auth_token_data(self, user, tenant, metadata, expiry):
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return dict(dict(user=user,
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tenant=tenant,
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metadata=metadata,
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expires=expiry))
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def _get_project_id_from_auth(self, context, auth):
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"""Extract tenant information from auth dict.
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Returns a valid tenant_id if it exists, or None if not specified.
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"""
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tenant_id = auth.get('tenantId', None)
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if tenant_id and len(tenant_id) > CONF.max_param_size:
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raise exception.ValidationSizeError(attribute='tenantId',
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size=CONF.max_param_size)
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tenant_name = auth.get('tenantName', None)
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if tenant_name and len(tenant_name) > CONF.max_param_size:
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raise exception.ValidationSizeError(attribute='tenantName',
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size=CONF.max_param_size)
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if tenant_name:
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try:
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tenant_ref = self.identity_api.get_project_by_name(
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context=context, tenant_name=tenant_name,
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domain_id=DEFAULT_DOMAIN_ID)
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tenant_id = tenant_ref['id']
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except exception.ProjectNotFound as e:
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raise exception.Unauthorized(e)
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return tenant_id
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def _get_domain_id_from_auth(self, context, auth):
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"""Extract domain information from v3 auth dict.
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Returns a valid domain_id if it exists, or None if not specified.
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"""
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# FIXME(henry-nash): This is a placeholder that needs to be
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# only called in the v3 context, and the auth.get calls
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# converted to the v3 format
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domain_id = auth.get('domainId', None)
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domain_name = auth.get('domainName', None)
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if domain_name:
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try:
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domain_ref = self.identity_api._get_domain_by_name(
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context=context, domain_name=domain_name)
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domain_id = domain_ref['id']
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except exception.DomainNotFound as e:
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raise exception.Unauthorized(e)
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return domain_id
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def _get_project_ref(self, context, user_id, tenant_id):
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"""Returns the tenant_ref for the user's tenant"""
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tenant_ref = None
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if tenant_id:
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tenants = self.identity_api.get_projects_for_user(context, user_id)
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if tenant_id not in tenants:
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msg = 'User %s is unauthorized for tenant %s' % (
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user_id, tenant_id)
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LOG.warning(msg)
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raise exception.Unauthorized(msg)
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try:
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tenant_ref = self.identity_api.get_project(context=context,
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tenant_id=tenant_id)
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except exception.ProjectNotFound as e:
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exception.Unauthorized(e)
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return tenant_ref
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def _get_metadata_ref(self, context, user_id=None, tenant_id=None,
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domain_id=None, group_id=None):
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"""Returns metadata_ref for a user or group in a tenant or domain"""
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metadata_ref = {}
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if (user_id or group_id) and (tenant_id or domain_id):
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try:
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metadata_ref = self.identity_api.get_metadata(
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context=context, user_id=user_id, tenant_id=tenant_id,
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domain_id=domain_id, group_id=group_id)
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except exception.MetadataNotFound:
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pass
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return metadata_ref
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def _get_group_metadata_ref(self, context, user_id,
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tenant_id=None, domain_id=None):
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"""Return any metadata for this project/domain due to group grants"""
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group_refs = self.identity_api.list_groups_for_user(context=context,
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user_id=user_id)
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metadata_ref = {}
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for x in group_refs:
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metadata_ref.update(self._get_metadata_ref(context,
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group_id=x['id'],
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tenant_id=tenant_id,
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domain_id=domain_id))
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return metadata_ref
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def _append_roles(self, metadata, additional_metadata):
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"""
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Update the roles in metadata to be the union of the roles from
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both of the passed metadatas
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"""
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first = set(metadata.get('roles', []))
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second = set(additional_metadata.get('roles', []))
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metadata['roles'] = list(first.union(second))
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def _get_token_ref(self, context, token_id, belongs_to=None):
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"""Returns a token if a valid one exists.
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Optionally, limited to a token owned by a specific tenant.
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"""
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# TODO(termie): this stuff should probably be moved to middleware
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self.assert_admin(context)
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data = self.token_api.get_token(context=context,
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token_id=token_id)
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if belongs_to:
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if data.get('tenant') is None:
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raise exception.Unauthorized(
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_('Token does not belong to specified tenant.'))
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if data['tenant'].get('id') != belongs_to:
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raise exception.Unauthorized(
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_('Token does not belong to specified tenant.'))
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return data
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def _assert_default_domain(self, context, token_ref):
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""" Make sure we are operating on default domain only. """
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if token_ref.get('token_data'):
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# this is a V3 token
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msg = _('Non-default domain is not supported')
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# user in a non-default is prohibited
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if (token_ref['token_data']['token']['user']['domain']['id'] !=
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DEFAULT_DOMAIN_ID):
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raise exception.Unauthorized(msg)
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# domain scoping is prohibited
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if token_ref['token_data']['token'].get('domain'):
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raise exception.Unauthorized(
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_('Domain scoped token is not supported'))
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# project in non-default domain is prohibited
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if token_ref['token_data']['token'].get('project'):
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project = token_ref['token_data']['token']['project']
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project_domain_id = project['domain']['id']
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# scoped to project in non-default domain is prohibited
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if project_domain_id != DEFAULT_DOMAIN_ID:
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raise exception.Unauthorized(msg)
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# if token is scoped to trust, both trustor and trustee must
|
|
# be in the default domain. Furthermore, the delegated project
|
|
# must also be in the default domain
|
|
metadata_ref = token_ref['metadata']
|
|
if CONF.trust.enabled and 'trust_id' in metadata_ref:
|
|
trust_ref = self.trust_api.get_trust(context,
|
|
metadata_ref['trust_id'])
|
|
trustee_user_ref = self.identity_api.get_user(
|
|
context, trust_ref['trustee_user_id'])
|
|
if trustee_user_ref['domain_id'] != DEFAULT_DOMAIN_ID:
|
|
raise exception.Unauthorized(msg)
|
|
trustor_user_ref = self.identity_api.get_user(
|
|
context, trust_ref['trustor_user_id'])
|
|
if trustor_user_ref['domain_id'] != DEFAULT_DOMAIN_ID:
|
|
raise exception.Unauthorized(msg)
|
|
project_ref = self.identity_api.get_project(
|
|
context, trust_ref['project_id'])
|
|
if project_ref['domain_id'] != DEFAULT_DOMAIN_ID:
|
|
raise exception.Unauthorized(msg)
|
|
|
|
# admin only
|
|
def validate_token_head(self, context, token_id):
|
|
"""Check that a token is valid.
|
|
|
|
Optionally, also ensure that it is owned by a specific tenant.
|
|
|
|
Identical to ``validate_token``, except does not return a response.
|
|
|
|
"""
|
|
belongs_to = context['query_string'].get('belongsTo')
|
|
token_ref = self._get_token_ref(context, token_id, belongs_to)
|
|
assert token_ref
|
|
self._assert_default_domain(context, token_ref)
|
|
|
|
# admin only
|
|
def validate_token(self, context, token_id):
|
|
"""Check that a token is valid.
|
|
|
|
Optionally, also ensure that it is owned by a specific tenant.
|
|
|
|
Returns metadata about the token along any associated roles.
|
|
|
|
"""
|
|
belongs_to = context['query_string'].get('belongsTo')
|
|
token_ref = self._get_token_ref(context, token_id, belongs_to)
|
|
self._assert_default_domain(context, token_ref)
|
|
|
|
# TODO(termie): optimize this call at some point and put it into the
|
|
# the return for metadata
|
|
# fill out the roles in the metadata
|
|
metadata_ref = token_ref['metadata']
|
|
roles_ref = []
|
|
for role_id in metadata_ref.get('roles', []):
|
|
roles_ref.append(self.identity_api.get_role(context, role_id))
|
|
|
|
# Get a service catalog if possible
|
|
# This is needed for on-behalf-of requests
|
|
catalog_ref = None
|
|
if token_ref.get('tenant'):
|
|
catalog_ref = self.catalog_api.get_catalog(
|
|
context=context,
|
|
user_id=token_ref['user']['id'],
|
|
tenant_id=token_ref['tenant']['id'],
|
|
metadata=metadata_ref)
|
|
return Auth.format_token(token_ref, roles_ref, catalog_ref)
|
|
|
|
def delete_token(self, context, token_id):
|
|
"""Delete a token, effectively invalidating it for authz."""
|
|
# TODO(termie): this stuff should probably be moved to middleware
|
|
self.assert_admin(context)
|
|
self.token_api.delete_token(context=context, token_id=token_id)
|
|
|
|
def revocation_list(self, context, auth=None):
|
|
self.assert_admin(context)
|
|
tokens = self.token_api.list_revoked_tokens(context)
|
|
|
|
for t in tokens:
|
|
expires = t['expires']
|
|
if not (expires and isinstance(expires, unicode)):
|
|
t['expires'] = timeutils.isotime(expires)
|
|
data = {'revoked': tokens}
|
|
json_data = json.dumps(data)
|
|
signed_text = cms.cms_sign_text(json_data,
|
|
CONF.signing.certfile,
|
|
CONF.signing.keyfile)
|
|
|
|
return {'signed': signed_text}
|
|
|
|
def endpoints(self, context, token_id):
|
|
"""Return a list of endpoints available to the token."""
|
|
self.assert_admin(context)
|
|
|
|
token_ref = self._get_token_ref(context, token_id)
|
|
|
|
catalog_ref = None
|
|
if token_ref.get('tenant'):
|
|
catalog_ref = self.catalog_api.get_catalog(
|
|
context=context,
|
|
user_id=token_ref['user']['id'],
|
|
tenant_id=token_ref['tenant']['id'],
|
|
metadata=token_ref['metadata'])
|
|
|
|
return Auth.format_endpoint_list(catalog_ref)
|
|
|
|
@classmethod
|
|
def format_authenticate(cls, token_ref, roles_ref, catalog_ref):
|
|
o = Auth.format_token(token_ref, roles_ref)
|
|
o['access']['serviceCatalog'] = Auth.format_catalog(catalog_ref)
|
|
return o
|
|
|
|
@classmethod
|
|
def format_token(cls, token_ref, roles_ref, catalog_ref=None):
|
|
user_ref = token_ref['user']
|
|
metadata_ref = token_ref['metadata']
|
|
expires = token_ref['expires']
|
|
if expires is not None:
|
|
if not isinstance(expires, unicode):
|
|
expires = timeutils.isotime(expires)
|
|
o = {'access': {'token': {'id': token_ref['id'],
|
|
'expires': expires,
|
|
'issued_at': timeutils.strtime()
|
|
},
|
|
'user': {'id': user_ref['id'],
|
|
'name': user_ref['name'],
|
|
'username': user_ref['name'],
|
|
'roles': roles_ref,
|
|
'roles_links': metadata_ref.get('roles_links',
|
|
[])
|
|
}
|
|
}
|
|
}
|
|
if 'tenant' in token_ref and token_ref['tenant']:
|
|
token_ref['tenant']['enabled'] = True
|
|
o['access']['token']['tenant'] = token_ref['tenant']
|
|
if catalog_ref is not None:
|
|
o['access']['serviceCatalog'] = Auth.format_catalog(catalog_ref)
|
|
if metadata_ref:
|
|
if 'is_admin' in metadata_ref:
|
|
o['access']['metadata'] = {'is_admin':
|
|
metadata_ref['is_admin']}
|
|
else:
|
|
o['access']['metadata'] = {'is_admin': 0}
|
|
if 'roles' in metadata_ref:
|
|
o['access']['metadata']['roles'] = metadata_ref['roles']
|
|
if CONF.trust.enabled and 'trust_id' in metadata_ref:
|
|
o['access']['trust'] = {'trustee_user_id':
|
|
metadata_ref['trustee_user_id'],
|
|
'id': metadata_ref['trust_id']
|
|
}
|
|
return o
|
|
|
|
@classmethod
|
|
def format_catalog(cls, catalog_ref):
|
|
"""Munge catalogs from internal to output format
|
|
Internal catalogs look like:
|
|
|
|
{$REGION: {
|
|
{$SERVICE: {
|
|
$key1: $value1,
|
|
...
|
|
}
|
|
}
|
|
}
|
|
|
|
The legacy api wants them to look like
|
|
|
|
[{'name': $SERVICE[name],
|
|
'type': $SERVICE,
|
|
'endpoints': [{
|
|
'tenantId': $tenant_id,
|
|
...
|
|
'region': $REGION,
|
|
}],
|
|
'endpoints_links': [],
|
|
}]
|
|
|
|
"""
|
|
if not catalog_ref:
|
|
return []
|
|
|
|
services = {}
|
|
for region, region_ref in catalog_ref.iteritems():
|
|
for service, service_ref in region_ref.iteritems():
|
|
new_service_ref = services.get(service, {})
|
|
new_service_ref['name'] = service_ref.pop('name')
|
|
new_service_ref['type'] = service
|
|
new_service_ref['endpoints_links'] = []
|
|
service_ref['region'] = region
|
|
|
|
endpoints_ref = new_service_ref.get('endpoints', [])
|
|
endpoints_ref.append(service_ref)
|
|
|
|
new_service_ref['endpoints'] = endpoints_ref
|
|
services[service] = new_service_ref
|
|
|
|
return services.values()
|
|
|
|
@classmethod
|
|
def format_endpoint_list(cls, catalog_ref):
|
|
"""Formats a list of endpoints according to Identity API v2.
|
|
|
|
The v2.0 API wants an endpoint list to look like::
|
|
|
|
{
|
|
'endpoints': [
|
|
{
|
|
'id': $endpoint_id,
|
|
'name': $SERVICE[name],
|
|
'type': $SERVICE,
|
|
'tenantId': $tenant_id,
|
|
'region': $REGION,
|
|
}
|
|
],
|
|
'endpoints_links': [],
|
|
}
|
|
|
|
"""
|
|
if not catalog_ref:
|
|
return {}
|
|
|
|
endpoints = []
|
|
for region_name, region_ref in catalog_ref.iteritems():
|
|
for service_type, service_ref in region_ref.iteritems():
|
|
endpoints.append({
|
|
'id': service_ref.get('id'),
|
|
'name': service_ref.get('name'),
|
|
'type': service_type,
|
|
'region': region_name,
|
|
'publicURL': service_ref.get('publicURL'),
|
|
'internalURL': service_ref.get('internalURL'),
|
|
'adminURL': service_ref.get('adminURL'),
|
|
})
|
|
|
|
return {'endpoints': endpoints, 'endpoints_links': []}
|