61 lines
1.9 KiB
Python
61 lines
1.9 KiB
Python
# Copyright 2011-2013 OpenStack, LLC.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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#
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"""Keyring backend for Openstack, to store encrypted password in a file."""
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from Crypto.Cipher import AES
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import keyring
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import os
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KEYRING_FILE = os.path.join(os.path.expanduser('~'), '.openstack-keyring.cfg')
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class OpenstackKeyring(keyring.backends.file.BaseKeyring):
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"""Openstack Keyring to store encrypted password."""
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filename = KEYRING_FILE
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def supported(self):
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"""Applicable for all platforms, but not recommend."""
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pass
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def _init_crypter(self):
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"""Initialize the crypter using the class name."""
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block_size = 32
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padding = '0'
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# init the cipher with the class name, upto block_size
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password = __name__[block_size:]
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password = password + (block_size - len(password) %
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block_size) * padding
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return AES.new(password, AES.MODE_CFB)
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def encrypt(self, password):
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"""Encrypt the given password."""
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crypter = self._init_crypter()
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return crypter.encrypt(password)
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def decrypt(self, password_encrypted):
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"""Decrypt the given password."""
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crypter = self._init_crypter()
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return crypter.decrypt(password_encrypted)
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def os_keyring():
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"""Initialize the openstack keyring."""
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ring = 'openstackclient.common.openstackkeyring.OpenstackKeyring'
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return keyring.core.load_keyring(None, ring)
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