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# Copyright 2011 OpenStack LLC.
# 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.
#
# vim: tabstop=4 shiftwidth=4 softtabstop=4
"""
Keyring backend for Openstack, to store encrypted password in a file.
"""
from Crypto.Cipher import AES
import crypt
import keyring
import os
KEYRING_FILE = os.path.join(os.path.expanduser('~'), '.openstack-keyring.cfg')
class OpenstackKeyring(keyring.backend.BasicFileKeyring):
""" Openstack Keyring to store encrypted password """
filename = KEYRING_FILE
def supported(self):
""" applicable for all platforms, but not recommend """
pass
def _init_crypter(self):
""" initialize the crypter using the class name """
block_size = 32
padding = '0'
# init the cipher with the class name, upto block_size
password = __name__[block_size:]
password = password + (block_size - len(password) % \
block_size) * padding
return AES.new(password, AES.MODE_CFB)
def encrypt(self, password):
""" encrypt the given password """
crypter = self._init_crypter()
return crypter.encrypt(password)
def decrypt(self, password_encrypted):
""" decrypt the given password """
crypter = self._init_crypter()
return crypter.decrypt(password_encrypted)
def os_keyring():
""" initialize the openstack keyring """
return keyring.core.load_keyring(None,
'openstackclient.common.openstackkeyring.OpenstackKeyring')
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