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# 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.
#
"""Authentication Library"""
import argparse
import logging
import stevedore
from oslo.config import cfg
from keystoneclient.auth import base
from openstackclient.common import exceptions as exc
from openstackclient.common import utils
LOG = logging.getLogger(__name__)
# Initialize the list of Authentication plugins early in order
# to get the command-line options
PLUGIN_LIST = stevedore.ExtensionManager(
base.PLUGIN_NAMESPACE,
invoke_on_load=False,
propagate_map_exceptions=True,
)
# Get the command line options so the help action has them available
OPTIONS_LIST = {}
for plugin in PLUGIN_LIST:
for o in plugin.plugin.get_options():
os_name = o.dest.lower().replace('_', '-')
os_env_name = 'OS_' + os_name.upper().replace('-', '_')
OPTIONS_LIST.setdefault(os_name, {'env': os_env_name, 'help': ''})
# TODO(mhu) simplistic approach, would be better to only add
# help texts if they vary from one auth plugin to another
# also the text rendering is ugly in the CLI ...
OPTIONS_LIST[os_name]['help'] += 'With %s: %s\n' % (
plugin.name,
o.help,
)
def select_auth_plugin(options):
"""Pick an auth plugin based on --os-auth-type or other options"""
auth_plugin_name = None
if options.os_auth_type in [plugin.name for plugin in PLUGIN_LIST]:
# A direct plugin name was given, use it
return options.os_auth_type
if options.os_url and options.os_token:
# service token authentication
auth_plugin_name = 'token_endpoint'
elif options.os_username:
if options.os_identity_api_version == '3':
auth_plugin_name = 'v3password'
elif options.os_identity_api_version == '2.0':
auth_plugin_name = 'v2password'
else:
# let keystoneclient figure it out itself
auth_plugin_name = 'password'
elif options.os_token:
if options.os_identity_api_version == '3':
auth_plugin_name = 'v3token'
elif options.os_identity_api_version == '2.0':
auth_plugin_name = 'v2token'
else:
# let keystoneclient figure it out itself
auth_plugin_name = 'token'
else:
raise exc.CommandError(
"Authentication type must be selected with --os-auth-type"
)
LOG.debug("Auth plugin %s selected" % auth_plugin_name)
return auth_plugin_name
def build_auth_params(auth_plugin_name, cmd_options):
auth_params = {}
if auth_plugin_name:
LOG.debug('auth_type: %s', auth_plugin_name)
auth_plugin_class = base.get_plugin_class(auth_plugin_name)
plugin_options = auth_plugin_class.get_options()
for option in plugin_options:
option_name = 'os_' + option.dest
LOG.debug('fetching option %s' % option_name)
auth_params[option.dest] = getattr(cmd_options, option_name, None)
# grab tenant from project for v2.0 API compatibility
if auth_plugin_name.startswith("v2"):
auth_params['tenant_id'] = getattr(
cmd_options,
'os_project_id',
None,
)
auth_params['tenant_name'] = getattr(
cmd_options,
'os_project_name',
None,
)
else:
LOG.debug('no auth_type')
# delay the plugin choice, grab every option
plugin_options = set([o.replace('-', '_') for o in OPTIONS_LIST])
for option in plugin_options:
option_name = 'os_' + option
LOG.debug('fetching option %s' % option_name)
auth_params[option] = getattr(cmd_options, option_name, None)
return (auth_plugin_class, auth_params)
def build_auth_plugins_option_parser(parser):
"""Auth plugins options builder
Builds dynamically the list of options expected by each available
authentication plugin.
"""
available_plugins = [plugin.name for plugin in PLUGIN_LIST]
parser.add_argument(
'--os-auth-type',
metavar='<auth-type>',
default=utils.env('OS_AUTH_TYPE'),
help='Select an auhentication type. Available types: ' +
', '.join(available_plugins) +
'. Default: selected based on --os-username/--os-token' +
' (Env: OS_AUTH_TYPE)',
choices=available_plugins
)
# make sur we catch old v2.0 env values
envs = {
'OS_PROJECT_NAME': utils.env(
'OS_PROJECT_NAME',
default=utils.env('OS_TENANT_NAME')
),
'OS_PROJECT_ID': utils.env(
'OS_PROJECT_ID',
default=utils.env('OS_TENANT_ID')
),
}
for o in OPTIONS_LIST:
# remove allusion to tenants from v2.0 API
if 'tenant' not in o:
parser.add_argument(
'--os-' + o,
metavar='<auth-%s>' % o,
default=envs.get(OPTIONS_LIST[o]['env'],
utils.env(OPTIONS_LIST[o]['env'])),
help='%s\n(Env: %s)' % (OPTIONS_LIST[o]['help'],
OPTIONS_LIST[o]['env']),
)
# add tenant-related options for compatibility
# this is deprecated but still used in some tempest tests...
parser.add_argument(
'--os-tenant-name',
metavar='<auth-tenant-name>',
dest='os_project_name',
default=utils.env('OS_TENANT_NAME'),
help=argparse.SUPPRESS,
)
parser.add_argument(
'--os-tenant-id',
metavar='<auth-tenant-id>',
dest='os_project_id',
default=utils.env('OS_TENANT_ID'),
help=argparse.SUPPRESS,
)
return parser
class TokenEndpoint(base.BaseAuthPlugin):
"""Auth plugin to handle traditional token/endpoint usage
Implements the methods required to handle token authentication
with a user-specified token and service endpoint; no Identity calls
are made for re-scoping, service catalog lookups or the like.
The purpose of this plugin is to get rid of the special-case paths
in the code to handle this authentication format. Its primary use
is for bootstrapping the Keystone database.
"""
def __init__(self, url, token, **kwargs):
"""A plugin for static authentication with an existing token
:param string url: Service endpoint
:param string token: Existing token
"""
super(TokenEndpoint, self).__init__()
self.endpoint = url
self.token = token
def get_endpoint(self, session, **kwargs):
"""Return the supplied endpoint"""
return self.endpoint
def get_token(self, session):
"""Return the supplied token"""
return self.token
def get_auth_ref(self, session, **kwargs):
"""Stub this method for compatibility"""
return None
# Override this because it needs to be a class method...
@classmethod
def get_options(self):
options = super(TokenEndpoint, self).get_options()
options.extend([
# Maintain name 'url' for compatibility
cfg.StrOpt('url',
help='Specific service endpoint to use'),
cfg.StrOpt('token',
secret=True,
help='Authentication token to use'),
])
return options
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