# 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 datetime
import logging
from django.contrib.auth import models
from django.db import models as db_models
from keystoneauth1 import exceptions as keystone_exceptions
from openstack_auth import utils
LOG = logging.getLogger(__name__)
def set_session_from_user(request, user):
request.session['token'] = user.token
request.session['user_id'] = user.id
request.session['region_endpoint'] = user.endpoint
request.session['services_region'] = user.services_region
# Update the user object cached in the request
request._cached_user = user
request.user = user
def unset_session_user_variables(request):
request.session['token'] = None
request.session['user_id'] = None
request.session['region_endpoint'] = None
request.session['services_region'] = None
request.session['auth_type'] = None
# Update the user object cached in the request
request._cached_user = None
request.user = None
def create_user_from_token(request, token, endpoint, services_region=None):
# if the region is provided, use that, otherwise use the preferred region
svc_region = services_region or \
utils.default_services_region(token.serviceCatalog, request, endpoint)
return User(id=token.user['id'],
token=token,
user=token.user['name'],
password_expires_at=token.user['password_expires_at'],
user_domain_id=token.user_domain_id,
# We need to consider already logged-in users with an old
# version of Token without user_domain_name.
user_domain_name=getattr(token, 'user_domain_name', None),
project_id=token.project['id'],
project_name=token.project['name'],
domain_id=token.domain['id'],
domain_name=token.domain['name'],
system_scoped=token.system_scoped,
enabled=True,
service_catalog=token.serviceCatalog,
roles=token.roles,
endpoint=endpoint,
services_region=svc_region,
is_federated=getattr(token, 'is_federated', False),
unscoped_token=getattr(token, 'unscoped_token',
request.session.get('unscoped_token')))
[docs]
class Token(object):
"""Encapsulates the AccessInfo object from keystoneclient.
Token object provides a consistent interface for accessing the keystone
token information and service catalog.
Added for maintaining backward compatibility with horizon that expects
Token object in the user object.
"""
def __init__(self, auth_ref, unscoped_token=None):
# User-related attributes
user = {'id': auth_ref.user_id, 'name': auth_ref.username}
data = getattr(auth_ref, '_data', {})
expiration_date = data.get('token', {}).get('user', {})\
.get('password_expires_at')
user['password_expires_at'] = expiration_date
self.user = user
self.user_domain_id = auth_ref.user_domain_id
self.user_domain_name = auth_ref.user_domain_name
# Token-related attributes
self.id = auth_ref.auth_token
self.unscoped_token = unscoped_token
self.expires = auth_ref.expires
# Project-related attributes
project = {}
project['id'] = auth_ref.project_id
project['name'] = auth_ref.project_name
project['is_admin_project'] = getattr(auth_ref, 'is_admin_project',
False)
project['domain_id'] = getattr(auth_ref, 'project_domain_id', None)
self.project = project
self.tenant = self.project
# Domain-related attributes
domain = {}
domain['id'] = auth_ref.domain_id
domain['name'] = auth_ref.domain_name
self.domain = domain
# Federation-related attributes
self.is_federated = auth_ref.is_federated
self.roles = [{'name': role} for role in auth_ref.role_names]
self.serviceCatalog = auth_ref.service_catalog.catalog
# System scope
# Only keystone API V3 has it.
self.system_scoped = getattr(auth_ref, 'system_scoped', False)
[docs]
class User(models.AbstractBaseUser, models.AnonymousUser):
"""A User class with some extra special sauce for Keystone.
In addition to the standard Django user attributes, this class also has
the following:
.. attribute:: token
The Keystone token object associated with the current user/tenant.
The token object is deprecated, user auth_ref instead.
.. attribute:: tenant_id
The id of the Keystone tenant for the current user/token.
The tenant_id keyword argument is deprecated, use project_id instead.
.. attribute:: tenant_name
The name of the Keystone tenant for the current user/token.
The tenant_name keyword argument is deprecated, use project_name
instead.
.. attribute:: project_id
The id of the Keystone project for the current user/token.
.. attribute:: project_name
The name of the Keystone project for the current user/token.
.. attribute:: service_catalog
The ``ServiceCatalog`` data returned by Keystone.
.. attribute:: roles
A list of dictionaries containing role names and ids as returned
by Keystone.
.. attribute:: services_region
A list of non-identity service endpoint regions extracted from the
service catalog.
.. attribute:: user_domain_id
The domain id of the current user.
.. attribute:: user_domain_name
The domain name of the current user.
.. attribute:: domain_id
The id of the Keystone domain scoped for the current user/token.
.. attribute:: is_federated
Whether user is federated Keystone user. (Boolean)
.. attribute:: unscoped_token
Unscoped Keystone token.
.. attribute:: password_expires_at
Password expiration date.
"""
keystone_user_id = db_models.CharField(primary_key=True, max_length=255)
USERNAME_FIELD = 'keystone_user_id'
def __init__(self, id=None, token=None, user=None, tenant_id=None,
service_catalog=None, tenant_name=None, roles=None,
authorized_tenants=None, endpoint=None, enabled=False,
services_region=None, user_domain_id=None,
user_domain_name=None, domain_id=None, domain_name=None,
project_id=None, project_name=None, is_federated=False,
unscoped_token=None, password=None, password_expires_at=None,
system_scoped=False):
self.id = id
self.pk = id
self.token = token
self.keystone_user_id = id
self.username = user
self.user_domain_id = user_domain_id
self.user_domain_name = user_domain_name
self.domain_id = domain_id
self.domain_name = domain_name
self.project_id = project_id or tenant_id
self.project_name = project_name or tenant_name
self.system_scoped = system_scoped
self.service_catalog = service_catalog
self._services_region = (
services_region or
utils.default_services_region(service_catalog)
)
self.roles = roles or []
self.endpoint = endpoint
self.enabled = enabled
self._authorized_tenants = authorized_tenants
self.is_federated = is_federated
self.password_expires_at = password_expires_at
self._is_system_user = None
# Unscoped token is used for listing user's project that works
# for both federated and keystone user.
self.unscoped_token = unscoped_token
# List of variables to be deprecated.
self.tenant_id = self.project_id
self.tenant_name = self.project_name
# Required by AbstractBaseUser
self.password = None
def __unicode__(self):
return self.username
def __repr__(self):
return "<%s: %s>" % (self.__class__.__name__, self.username)
[docs]
def is_token_expired(self, margin=None):
"""Determine if the token is expired.
:returns:
``True`` if the token is expired, ``False`` if not, and
``None`` if there is no token set.
:param margin:
A security time margin in seconds before real expiration.
Will return ``True`` if the token expires in less than ``margin``
seconds of time.
A default margin can be set by the TOKEN_TIMEOUT_MARGIN in the
django settings.
"""
if self.token is None:
return None
return not utils.is_token_valid(self.token, margin)
@property
def is_authenticated(self):
"""Checks for a valid authentication."""
return self.token is not None and utils.is_token_valid(self.token)
@property
def is_anonymous(self):
"""Return if the user is not authenticated.
:returns: ``True`` if not authenticated,``False`` otherwise.
"""
return not self.is_authenticated
@property
def is_active(self):
return self.enabled
@property
def is_superuser(self):
"""Evaluates whether this user has admin privileges.
:returns: ``True`` or ``False``.
"""
admin_roles = utils.get_admin_roles()
user_roles = {role['name'].lower() for role in self.roles}
return not admin_roles.isdisjoint(user_roles)
@property
def authorized_tenants(self):
"""Returns a memoized list of tenants this user may access."""
if self.is_authenticated and self._authorized_tenants is None:
endpoint = self.endpoint
try:
self._authorized_tenants = utils.get_project_list(
user_id=self.id,
auth_url=endpoint,
token=self.unscoped_token,
is_federated=self.is_federated)
except (keystone_exceptions.ClientException,
keystone_exceptions.AuthorizationFailure):
LOG.exception('Unable to retrieve project list.')
return self._authorized_tenants or []
@authorized_tenants.setter
def authorized_tenants(self, tenant_list):
self._authorized_tenants = tenant_list
@property
def services_region(self):
return self._services_region
@services_region.setter
def services_region(self, region):
self._services_region = region
@property
def available_services_regions(self):
"""Returns list of unique region name values in service catalog."""
regions = []
if self.service_catalog:
for service in self.service_catalog:
service_type = service.get('type')
if service_type is None or service_type == 'identity':
continue
for endpoint in service.get('endpoints', []):
region = utils.get_endpoint_region(endpoint)
if region not in regions:
regions.append(region)
return regions
@property
def is_system_user(self):
"""Check if the user has access to the system scope."""
if self._is_system_user is not None:
return self._is_system_user
try:
self._is_system_user = utils.get_system_access(
user_id=self.id,
auth_url=self.endpoint,
token=self.unscoped_token,
is_federated=self.is_federated)
except (keystone_exceptions.ClientException,
keystone_exceptions.AuthorizationFailure):
LOG.exception('Unable to retrieve systems list.')
return self._is_system_user
[docs]
def save(self, *args, **kwargs):
# Presume we can't write to Keystone.
pass
def delete(self, *args, **kwargs):
# Presume we can't write to Keystone.
pass
# Check for OR'd permission rules, check that user has one of the
# required permission.
[docs]
def has_a_matching_perm(self, perm_list, obj=None):
"""Returns True if the user has one of the specified permissions.
If object is passed, it checks if the user has any of the required
perms for this object.
"""
# If there are no permissions to check, just return true
if not perm_list:
return True
# Check that user has at least one of the required permissions.
for perm in perm_list:
if self.has_perm(perm, obj):
return True
return False
# Override the default has_perms method. Allowing for more
# complex combinations of permissions. Will check for logical AND of
# all top level permissions. Will use logical OR for all first level
# tuples (check that use has one permissions in the tuple)
#
# Examples:
# Checks for all required permissions
# ('openstack.roles.admin', 'openstack.roles.L3-support')
#
# Checks for admin AND (L2 or L3)
# ('openstack.roles.admin', ('openstack.roles.L3-support',
# 'openstack.roles.L2-support'),)
[docs]
def has_perms(self, perm_list, obj=None):
"""Returns True if the user has all of the specified permissions.
Tuples in the list will possess the required permissions if
the user has a permissions matching one of the elements of
that tuple
"""
# If there are no permissions to check, just return true
if not perm_list:
return True
for perm in perm_list:
if isinstance(perm, str):
# check that the permission matches
if not self.has_perm(perm, obj):
return False
else:
# check that a permission in the tuple matches
if not self.has_a_matching_perm(perm, obj):
return False
return True
[docs]
def time_until_expiration(self):
"""Returns the number of remaining days until user's password expires.
Calculates the number days until the user must change their password,
once the password expires the user will not able to log in until an
admin changes its password.
"""
if self.password_expires_at is not None:
expiration_date = datetime.datetime.strptime(
self.password_expires_at, "%Y-%m-%dT%H:%M:%S.%f")
return expiration_date - datetime.datetime.now()
class Meta(object):
app_label = 'openstack_auth'
