# 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 datetime
import sqlalchemy
from keystone.common import driver_hints
from keystone.common import sql
from keystone.common import utils
import keystone.conf
from keystone import exception
from keystone.i18n import _
from keystone.identity.backends import base
from keystone.identity.backends import sql_model as model
CONF = keystone.conf.CONF
[docs]class Identity(base.IdentityDriverV8):
# NOTE(henry-nash): Override the __init__() method so as to take a
# config parameter to enable sql to be used as a domain-specific driver.
def __init__(self, conf=None):
self.conf = conf
super(Identity, self).__init__()
@property
[docs] def is_sql(self):
return True
def _check_password(self, password, user_ref):
"""Check the specified password against the data store.
Note that we'll pass in the entire user_ref in case the subclass
needs things like user_ref.get('name')
For further justification, please see the follow up suggestion at
https://blueprints.launchpad.net/keystone/+spec/sql-identiy-pam
"""
return utils.check_password(password, user_ref.password)
# Identity interface
[docs] def authenticate(self, user_id, password):
with sql.session_for_read() as session:
try:
user_ref = self._get_user(session, user_id)
except exception.UserNotFound:
raise AssertionError(_('Invalid user / password'))
if self._is_account_locked(user_id, user_ref):
raise exception.AccountLocked(user_id=user_id)
elif not self._check_password(password, user_ref):
self._record_failed_auth(user_id)
raise AssertionError(_('Invalid user / password'))
elif not user_ref.enabled:
raise exception.UserDisabled(user_id=user_id)
elif user_ref.password_is_expired:
raise exception.PasswordExpired(user_id=user_id)
# successful auth, reset failed count if present
if user_ref.local_user.failed_auth_count:
self._reset_failed_auth(user_id)
return base.filter_user(user_ref.to_dict())
def _is_account_locked(self, user_id, user_ref):
"""Check if the user account is locked.
Checks if the user account is locked based on the number of failed
authentication attempts.
:param user_id: The user ID
:param user_ref: Reference to the user object
:returns Boolean: True if the account is locked; False otherwise
"""
attempts = user_ref.local_user.failed_auth_count or 0
max_attempts = CONF.security_compliance.lockout_failure_attempts
lockout_duration = CONF.security_compliance.lockout_duration
if max_attempts and (attempts >= max_attempts):
if not lockout_duration:
return True
else:
delta = datetime.timedelta(seconds=lockout_duration)
last_failure = user_ref.local_user.failed_auth_at
if (last_failure + delta) > datetime.datetime.utcnow():
return True
else:
self._reset_failed_auth(user_id)
return False
def _record_failed_auth(self, user_id):
with sql.session_for_write() as session:
user_ref = session.query(model.User).get(user_id)
if not user_ref.local_user.failed_auth_count:
user_ref.local_user.failed_auth_count = 0
user_ref.local_user.failed_auth_count += 1
user_ref.local_user.failed_auth_at = datetime.datetime.utcnow()
def _reset_failed_auth(self, user_id):
with sql.session_for_write() as session:
user_ref = session.query(model.User).get(user_id)
user_ref.local_user.failed_auth_count = 0
user_ref.local_user.failed_auth_at = None
# user crud
@sql.handle_conflicts(conflict_type='user')
[docs] def create_user(self, user_id, user):
user = utils.hash_user_password(user)
with sql.session_for_write() as session:
user_ref = model.User.from_dict(user)
user_ref.created_at = datetime.datetime.utcnow()
session.add(user_ref)
return base.filter_user(user_ref.to_dict())
@driver_hints.truncated
[docs] def list_users(self, hints):
with sql.session_for_read() as session:
query = session.query(model.User).outerjoin(model.LocalUser)
user_refs = sql.filter_limit_query(model.User, query, hints)
return [base.filter_user(x.to_dict()) for x in user_refs]
def _get_user(self, session, user_id):
user_ref = session.query(model.User).get(user_id)
if not user_ref:
raise exception.UserNotFound(user_id=user_id)
return user_ref
[docs] def get_user(self, user_id):
with sql.session_for_read() as session:
return base.filter_user(
self._get_user(session, user_id).to_dict())
[docs] def get_user_by_name(self, user_name, domain_id):
with sql.session_for_read() as session:
query = session.query(model.User).join(model.LocalUser)
query = query.filter(sqlalchemy.and_(
model.LocalUser.name == user_name,
model.LocalUser.domain_id == domain_id))
try:
user_ref = query.one()
except sql.NotFound:
raise exception.UserNotFound(user_id=user_name)
return base.filter_user(user_ref.to_dict())
@sql.handle_conflicts(conflict_type='user')
[docs] def update_user(self, user_id, user):
with sql.session_for_write() as session:
user_ref = self._get_user(session, user_id)
old_user_dict = user_ref.to_dict()
user = utils.hash_user_password(user)
for k in user:
old_user_dict[k] = user[k]
new_user = model.User.from_dict(old_user_dict)
for attr in model.User.attributes:
if attr not in model.User.readonly_attributes:
setattr(user_ref, attr, getattr(new_user, attr))
user_ref.extra = new_user.extra
return base.filter_user(
user_ref.to_dict(include_extra_dict=True))
def _validate_password_history(self, password, user_ref):
unique_cnt = CONF.security_compliance.unique_last_password_count
# Slice off all of the extra passwords.
user_ref.local_user.passwords = (
user_ref.local_user.passwords[-unique_cnt:])
# Validate the new password against the remaining passwords.
if unique_cnt > 1:
for password_ref in user_ref.local_user.passwords:
if utils.check_password(password, password_ref.password):
detail = _('The new password cannot be identical to a '
'previous password. The number of previous '
'passwords that must be unique is: '
'%(unique_cnt)d') % {'unique_cnt': unique_cnt}
raise exception.PasswordValidationError(detail=detail)
[docs] def change_password(self, user_id, new_password):
with sql.session_for_write() as session:
user_ref = session.query(model.User).get(user_id)
if user_ref.password_ref and user_ref.password_ref.self_service:
self._validate_minimum_password_age(user_ref)
self._validate_password_history(new_password, user_ref)
user_ref.password = utils.hash_password(new_password)
user_ref.password_ref.self_service = True
def _validate_minimum_password_age(self, user_ref):
min_age_days = CONF.security_compliance.minimum_password_age
min_age = (user_ref.password_created_at +
datetime.timedelta(days=min_age_days))
if datetime.datetime.utcnow() < min_age:
days_left = (min_age - datetime.datetime.utcnow()).days
raise exception.PasswordAgeValidationError(
min_age_days=min_age_days, days_left=days_left)
[docs] def add_user_to_group(self, user_id, group_id):
with sql.session_for_write() as session:
self.get_group(group_id)
self.get_user(user_id)
query = session.query(model.UserGroupMembership)
query = query.filter_by(user_id=user_id)
query = query.filter_by(group_id=group_id)
rv = query.first()
if rv:
return
session.add(model.UserGroupMembership(user_id=user_id,
group_id=group_id))
[docs] def check_user_in_group(self, user_id, group_id):
with sql.session_for_read() as session:
self.get_group(group_id)
self.get_user(user_id)
query = session.query(model.UserGroupMembership)
query = query.filter_by(user_id=user_id)
query = query.filter_by(group_id=group_id)
if not query.first():
raise exception.NotFound(_("User '%(user_id)s' not found in"
" group '%(group_id)s'") %
{'user_id': user_id,
'group_id': group_id})
[docs] def remove_user_from_group(self, user_id, group_id):
# We don't check if user or group are still valid and let the remove
# be tried anyway - in case this is some kind of clean-up operation
with sql.session_for_write() as session:
query = session.query(model.UserGroupMembership)
query = query.filter_by(user_id=user_id)
query = query.filter_by(group_id=group_id)
membership_ref = query.first()
if membership_ref is None:
# Check if the group and user exist to return descriptive
# exceptions.
self.get_group(group_id)
self.get_user(user_id)
raise exception.NotFound(_("User '%(user_id)s' not found in"
" group '%(group_id)s'") %
{'user_id': user_id,
'group_id': group_id})
session.delete(membership_ref)
[docs] def list_groups_for_user(self, user_id, hints):
with sql.session_for_read() as session:
self.get_user(user_id)
query = session.query(model.Group).join(model.UserGroupMembership)
query = query.filter(model.UserGroupMembership.user_id == user_id)
query = sql.filter_limit_query(model.Group, query, hints)
return [g.to_dict() for g in query]
[docs] def list_users_in_group(self, group_id, hints):
with sql.session_for_read() as session:
self.get_group(group_id)
query = session.query(model.User).outerjoin(model.LocalUser)
query = query.join(model.UserGroupMembership)
query = query.filter(
model.UserGroupMembership.group_id == group_id)
query = sql.filter_limit_query(model.User, query, hints)
return [base.filter_user(u.to_dict()) for u in query]
[docs] def delete_user(self, user_id):
with sql.session_for_write() as session:
ref = self._get_user(session, user_id)
q = session.query(model.UserGroupMembership)
q = q.filter_by(user_id=user_id)
q.delete(False)
session.delete(ref)
# group crud
@sql.handle_conflicts(conflict_type='group')
[docs] def create_group(self, group_id, group):
with sql.session_for_write() as session:
ref = model.Group.from_dict(group)
session.add(ref)
return ref.to_dict()
@driver_hints.truncated
[docs] def list_groups(self, hints):
with sql.session_for_read() as session:
query = session.query(model.Group)
refs = sql.filter_limit_query(model.Group, query, hints)
return [ref.to_dict() for ref in refs]
def _get_group(self, session, group_id):
ref = session.query(model.Group).get(group_id)
if not ref:
raise exception.GroupNotFound(group_id=group_id)
return ref
[docs] def get_group(self, group_id):
with sql.session_for_read() as session:
return self._get_group(session, group_id).to_dict()
[docs] def get_group_by_name(self, group_name, domain_id):
with sql.session_for_read() as session:
query = session.query(model.Group)
query = query.filter_by(name=group_name)
query = query.filter_by(domain_id=domain_id)
try:
group_ref = query.one()
except sql.NotFound:
raise exception.GroupNotFound(group_id=group_name)
return group_ref.to_dict()
@sql.handle_conflicts(conflict_type='group')
[docs] def update_group(self, group_id, group):
with sql.session_for_write() as session:
ref = self._get_group(session, group_id)
old_dict = ref.to_dict()
for k in group:
old_dict[k] = group[k]
new_group = model.Group.from_dict(old_dict)
for attr in model.Group.attributes:
if attr != 'id':
setattr(ref, attr, getattr(new_group, attr))
ref.extra = new_group.extra
return ref.to_dict()
[docs] def delete_group(self, group_id):
with sql.session_for_write() as session:
ref = self._get_group(session, group_id)
q = session.query(model.UserGroupMembership)
q = q.filter_by(group_id=group_id)
q.delete(False)
session.delete(ref)