/usr/lib/python2.7/dist-packages/openstack_auth/backend.py is in python-openstack-auth 1.1.6-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 | # 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.
""" Module defining the Django auth backend class for the Keystone API. """
import logging
from django.conf import settings
from django.utils.translation import ugettext_lazy as _
from keystoneclient import exceptions as keystone_exceptions
from openstack_auth import exceptions
from openstack_auth import user as auth_user
from openstack_auth import utils
LOG = logging.getLogger(__name__)
KEYSTONE_CLIENT_ATTR = "_keystoneclient"
class KeystoneBackend(object):
"""Django authentication backend class for use with
``django.contrib.auth``.
"""
def check_auth_expiry(self, auth_ref):
if not utils.check_token_expiration(auth_ref):
msg = _("The authentication token issued by the Identity service "
"has expired.")
LOG.warning("The authentication token issued by the Identity "
"service appears to have expired before it was "
"issued. This may indicate a problem with either your "
"server or client configuration.")
raise exceptions.KeystoneAuthException(msg)
return True
def get_user(self, user_id):
"""Returns the current user (if authenticated) based on the user ID
and session data.
Note: this required monkey-patching the ``contrib.auth`` middleware
to make the ``request`` object available to the auth backend class.
"""
if (hasattr(self, 'request') and
user_id == self.request.session["user_id"]):
token = self.request.session['token']
endpoint = self.request.session['region_endpoint']
services_region = self.request.session['services_region']
user = auth_user.create_user_from_token(self.request, token,
endpoint, services_region)
return user
else:
return None
def authenticate(self, request=None, username=None, password=None,
user_domain_name=None, auth_url=None):
"""Authenticates a user via the Keystone Identity API. """
LOG.debug('Beginning user authentication for user "%s".' % username)
insecure = getattr(settings, 'OPENSTACK_SSL_NO_VERIFY', False)
ca_cert = getattr(settings, "OPENSTACK_SSL_CACERT", None)
endpoint_type = getattr(
settings, 'OPENSTACK_ENDPOINT_TYPE', 'publicURL')
# keystone client v3 does not support logging in on the v2 url any more
if utils.get_keystone_version() >= 3:
auth_url = auth_url.replace('v2.0', 'v3')
keystone_client = utils.get_keystone_client()
try:
client = keystone_client.Client(
user_domain_name=user_domain_name,
username=username,
password=password,
auth_url=auth_url,
insecure=insecure,
cacert=ca_cert,
debug=settings.DEBUG)
unscoped_auth_ref = client.auth_ref
unscoped_token = auth_user.Token(auth_ref=unscoped_auth_ref)
except (keystone_exceptions.Unauthorized,
keystone_exceptions.Forbidden,
keystone_exceptions.NotFound) as exc:
msg = _('Invalid user name or password.')
LOG.debug(str(exc))
raise exceptions.KeystoneAuthException(msg)
except (keystone_exceptions.ClientException,
keystone_exceptions.AuthorizationFailure) as exc:
msg = _("An error occurred authenticating. "
"Please try again later.")
LOG.debug(str(exc))
raise exceptions.KeystoneAuthException(msg)
# Check expiry for our unscoped auth ref.
self.check_auth_expiry(unscoped_auth_ref)
# Check if token is automatically scoped to default_project
if unscoped_auth_ref.project_scoped:
auth_ref = unscoped_auth_ref
else:
# For now we list all the user's projects and iterate through.
try:
if utils.get_keystone_version() < 3:
projects = client.tenants.list()
else:
client.management_url = auth_url
projects = client.projects.list(
user=unscoped_auth_ref.user_id)
except (keystone_exceptions.ClientException,
keystone_exceptions.AuthorizationFailure) as exc:
msg = _('Unable to retrieve authorized projects.')
raise exceptions.KeystoneAuthException(msg)
# Abort if there are no projects for this user
if not projects:
msg = _('You are not authorized for any projects.')
raise exceptions.KeystoneAuthException(msg)
while projects:
project = projects.pop()
try:
client = keystone_client.Client(
tenant_id=project.id,
token=unscoped_auth_ref.auth_token,
auth_url=auth_url,
insecure=insecure,
cacert=ca_cert,
debug=settings.DEBUG)
auth_ref = client.auth_ref
break
except (keystone_exceptions.ClientException,
keystone_exceptions.AuthorizationFailure):
auth_ref = None
if auth_ref is None:
msg = _("Unable to authenticate to any available projects.")
raise exceptions.KeystoneAuthException(msg)
# Check expiry for our new scoped token.
self.check_auth_expiry(auth_ref)
# If we made it here we succeeded. Create our User!
user = auth_user.create_user_from_token(
request,
auth_user.Token(auth_ref),
client.service_catalog.url_for(endpoint_type=endpoint_type))
if request is not None:
request.session['unscoped_token'] = unscoped_token.id
request.user = user
# Support client caching to save on auth calls.
setattr(request, KEYSTONE_CLIENT_ATTR, client)
LOG.debug('Authentication completed for user "%s".' % username)
return user
def get_group_permissions(self, user, obj=None):
"""Returns an empty set since Keystone doesn't support "groups". """
# Keystone V3 added "groups". The Auth token response includes the
# roles from the user's Group assignment. It should be fine just
# returning an empty set here.
return set()
def get_all_permissions(self, user, obj=None):
"""Returns a set of permission strings that this user has through
his/her Keystone "roles".
The permissions are returned as ``"openstack.{{ role.name }}"``.
"""
if user.is_anonymous() or obj is not None:
return set()
# TODO(gabrielhurley): Integrate policy-driven RBAC
# when supported by Keystone.
role_perms = set(["openstack.roles.%s" % role['name'].lower()
for role in user.roles])
service_perms = set(["openstack.services.%s" % service['type'].lower()
for service in user.service_catalog
if user.services_region in
[endpoint.get('region', None) for endpoint
in service.get('endpoints', [])]])
return role_perms | service_perms
def has_perm(self, user, perm, obj=None):
"""Returns True if the given user has the specified permission. """
if not user.is_active:
return False
return perm in self.get_all_permissions(user, obj)
def has_module_perms(self, user, app_label):
"""Returns True if user has any permissions in the given app_label.
Currently this matches for the app_label ``"openstack"``.
"""
if not user.is_active:
return False
for perm in self.get_all_permissions(user):
if perm[:perm.index('.')] == app_label:
return True
return False
|