1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
|
# Copyright 2011-2013 OpenStack, LLC.
#
# 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.
#
"""Keyring backend for OpenStack, to store encrypted password in a file."""
from Crypto.Cipher import AES
import keyring
import os
KEYRING_FILE = os.path.join(os.path.expanduser('~'), '.openstack-keyring.cfg')
class OpenStackKeyring(keyring.backends.file.BaseKeyring):
"""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, up to 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."""
ring = 'openstackclient.common.openstackkeyring.OpenStackKeyring'
return keyring.core.load_keyring(None, ring)
|
