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# vim: tabstop=4 shiftwidth=4 softtabstop=4
# Copyright 2010 United States Government as represented by the
# Administrator of the National Aeronautics and Space Administration.
# All Rights Reserved.
#
# 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.
"""
Auth driver using the DB as its backend.
"""
import sys
from nova import context
from nova import exception
from nova import db
class DbDriver(object):
"""DB Auth driver
Defines enter and exit and therefore supports the with/as syntax.
"""
def __init__(self):
"""Imports the LDAP module"""
pass
def __enter__(self):
return self
def __exit__(self, exc_type, exc_value, traceback):
pass
def get_user(self, uid):
"""Retrieve user by id"""
user = db.user_get(context.get_admin_context(), uid)
return self._db_user_to_auth_user(user)
def get_user_from_access_key(self, access):
"""Retrieve user by access key"""
user = db.user_get_by_access_key(context.get_admin_context(), access)
return self._db_user_to_auth_user(user)
def get_project(self, pid):
"""Retrieve project by id"""
project = db.project_get(context.get_admin_context(), pid)
return self._db_project_to_auth_projectuser(project)
def get_users(self):
"""Retrieve list of users"""
return [self._db_user_to_auth_user(user)
for user in db.user_get_all(context.get_admin_context())]
def get_projects(self, uid=None):
"""Retrieve list of projects"""
if uid:
result = db.project_get_by_user(context.get_admin_context(), uid)
else:
result = db.project_get_all(context.get_admin_context())
return [self._db_project_to_auth_projectuser(proj) for proj in result]
def create_user(self, name, access_key, secret_key, is_admin):
"""Create a user"""
values = {'id': name,
'access_key': access_key,
'secret_key': secret_key,
'is_admin': is_admin}
try:
user_ref = db.user_create(context.get_admin_context(), values)
return self._db_user_to_auth_user(user_ref)
except exception.Duplicate, e:
raise exception.Duplicate(_('User %s already exists') % name)
def _db_user_to_auth_user(self, user_ref):
return {'id': user_ref['id'],
'name': user_ref['id'],
'access': user_ref['access_key'],
'secret': user_ref['secret_key'],
'admin': user_ref['is_admin']}
def _db_project_to_auth_projectuser(self, project_ref):
member_ids = [member['id'] for member in project_ref['members']]
return {'id': project_ref['id'],
'name': project_ref['name'],
'project_manager_id': project_ref['project_manager'],
'description': project_ref['description'],
'member_ids': member_ids}
def create_project(self, name, manager_uid,
description=None, member_uids=None):
"""Create a project"""
manager = db.user_get(context.get_admin_context(), manager_uid)
if not manager:
raise exception.NotFound(_("Project can't be created because "
"manager %s doesn't exist")
% manager_uid)
# description is a required attribute
if description is None:
description = name
# First, we ensure that all the given users exist before we go
# on to create the project. This way we won't have to destroy
# the project again because a user turns out to be invalid.
members = set([manager])
if member_uids != None:
for member_uid in member_uids:
member = db.user_get(context.get_admin_context(), member_uid)
if not member:
raise exception.NotFound(_("Project can't be created "
"because user %s doesn't exist")
% member_uid)
members.add(member)
values = {'id': name,
'name': name,
'project_manager': manager['id'],
'description': description}
try:
project = db.project_create(context.get_admin_context(), values)
except exception.Duplicate:
raise exception.Duplicate(_("Project can't be created because "
"project %s already exists") % name)
for member in members:
db.project_add_member(context.get_admin_context(),
project['id'],
member['id'])
# This looks silly, but ensures that the members element has been
# correctly populated
project_ref = db.project_get(context.get_admin_context(),
project['id'])
return self._db_project_to_auth_projectuser(project_ref)
def modify_project(self, project_id, manager_uid=None, description=None):
"""Modify an existing project"""
if not manager_uid and not description:
return
values = {}
if manager_uid:
manager = db.user_get(context.get_admin_context(), manager_uid)
if not manager:
raise exception.NotFound(_("Project can't be modified because "
"manager %s doesn't exist") %
manager_uid)
values['project_manager'] = manager['id']
if description:
values['description'] = description
db.project_update(context.get_admin_context(), project_id, values)
if not self.is_in_project(manager_uid, project_id):
self.add_to_project(manager_uid, project_id)
def add_to_project(self, uid, project_id):
"""Add user to project"""
user, project = self._validate_user_and_project(uid, project_id)
db.project_add_member(context.get_admin_context(),
project['id'],
user['id'])
def remove_from_project(self, uid, project_id):
"""Remove user from project"""
user, project = self._validate_user_and_project(uid, project_id)
db.project_remove_member(context.get_admin_context(),
project['id'],
user['id'])
def is_in_project(self, uid, project_id):
"""Check if user is in project"""
user, project = self._validate_user_and_project(uid, project_id)
return user in project.members
def has_role(self, uid, role, project_id=None):
"""Check if user has role
If project is specified, it checks for local role, otherwise it
checks for global role
"""
return role in self.get_user_roles(uid, project_id)
def add_role(self, uid, role, project_id=None):
"""Add role for user (or user and project)"""
if not project_id:
db.user_add_role(context.get_admin_context(), uid, role)
return
db.user_add_project_role(context.get_admin_context(),
uid, project_id, role)
def remove_role(self, uid, role, project_id=None):
"""Remove role for user (or user and project)"""
if not project_id:
db.user_remove_role(context.get_admin_context(), uid, role)
return
db.user_remove_project_role(context.get_admin_context(),
uid, project_id, role)
def get_user_roles(self, uid, project_id=None):
"""Retrieve list of roles for user (or user and project)"""
if project_id is None:
roles = db.user_get_roles(context.get_admin_context(), uid)
return roles
else:
roles = db.user_get_roles_for_project(context.get_admin_context(),
uid, project_id)
return roles
def delete_user(self, id):
"""Delete a user"""
user = db.user_get(context.get_admin_context(), id)
db.user_delete(context.get_admin_context(), user['id'])
def delete_project(self, project_id):
"""Delete a project"""
db.project_delete(context.get_admin_context(), project_id)
def modify_user(self, uid, access_key=None, secret_key=None, admin=None):
"""Modify an existing user"""
if not access_key and not secret_key and admin is None:
return
values = {}
if access_key:
values['access_key'] = access_key
if secret_key:
values['secret_key'] = secret_key
if admin is not None:
values['is_admin'] = admin
db.user_update(context.get_admin_context(), uid, values)
def _validate_user_and_project(self, user_id, project_id):
user = db.user_get(context.get_admin_context(), user_id)
if not user:
raise exception.NotFound(_('User "%s" not found') % user_id)
project = db.project_get(context.get_admin_context(), project_id)
if not project:
raise exception.NotFound(_('Project "%s" not found') % project_id)
return user, project
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