cloudbase-init/cloudbaseinit/utils/crypt.py

41 lines
1.3 KiB
Python

# Copyright 2013 Cloudbase Solutions Srl
#
# 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.
import base64
from cryptography.hazmat import backends
from cryptography.hazmat.primitives.asymmetric import padding
from cryptography.hazmat.primitives import serialization
class CryptException(Exception):
pass
class CryptManager(object):
def public_encrypt(self, ssh_pub_key, password):
ssh_rsa_prefix = "ssh-rsa "
if not ssh_pub_key.startswith(ssh_rsa_prefix):
raise CryptException('Invalid SSH key')
rsa_public_key = serialization.load_ssh_public_key(
ssh_pub_key.encode(), backends.default_backend())
enc_password = rsa_public_key.encrypt(
password.encode(),
padding.PKCS1v15()
)
return base64.b64encode(enc_password)