#!/usr/bin/env python3 # # Copyright (C) 2021 VyOS maintainers and contributors # # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License version 2 or later as # published by the Free Software Foundation. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program. If not, see <http://www.gnu.org/licenses/>. # Migrate rsa keys into PKI configuration import base64 import os import struct from cryptography.hazmat.primitives.asymmetric import rsa from sys import argv from sys import exit from vyos.configtree import ConfigTree from vyos.pki import load_public_key from vyos.pki import load_private_key from vyos.pki import encode_public_key from vyos.pki import encode_private_key if len(argv) < 2: print("Must specify file name!") exit(1) file_name = argv[1] with open(file_name, 'r') as f: config_file = f.read() pki_base = ['pki'] ipsec_site_base = ['vpn', 'ipsec', 'site-to-site', 'peer'] rsa_keys_base = ['vpn', 'rsa-keys'] config = ConfigTree(config_file) LOCAL_KEY_PATHS = ['/config/auth/', '/config/ipsec.d/rsa-keys/'] def migrate_from_vyatta_key(data): data = base64.b64decode(data[2:]) length = struct.unpack('B', data[:1])[0] e = int.from_bytes(data[1:1+length], 'big') n = int.from_bytes(data[1+length:], 'big') public_numbers = rsa.RSAPublicNumbers(e, n) return public_numbers.public_key() def wrapped_pem_to_config_value(pem): return "".join(pem.strip().split("\n")[1:-1]) local_key_name = 'localhost' if config.exists(rsa_keys_base): if not config.exists(pki_base + ['key-pair']): config.set(pki_base + ['key-pair']) config.set_tag(pki_base + ['key-pair']) if config.exists(rsa_keys_base + ['local-key', 'file']): local_file = config.return_value(rsa_keys_base + ['local-key', 'file']) local_path = None local_key = None for path in LOCAL_KEY_PATHS: full_path = os.path.join(path, local_file) if os.path.exists(full_path): local_path = full_path break if local_path: with open(local_path, 'r') as f: local_key_data = f.read() local_key = load_private_key(local_key_data, wrap_tags=False) if local_key: local_key_pem = encode_private_key(local_key) config.set(pki_base + ['key-pair', local_key_name, 'private', 'key'], value=wrapped_pem_to_config_value(local_key_pem)) else: print('Failed to migrate local RSA key') if config.exists(rsa_keys_base + ['rsa-key-name']): for rsa_name in config.list_nodes(rsa_keys_base + ['rsa-key-name']): if not config.exists(rsa_keys_base + ['rsa-key-name', rsa_name, 'rsa-key']): continue vyatta_key = config.return_value(rsa_keys_base + ['rsa-key-name', rsa_name, 'rsa-key']) public_key = migrate_from_vyatta_key(vyatta_key) if public_key: public_key_pem = encode_public_key(public_key) config.set(pki_base + ['key-pair', rsa_name, 'public', 'key'], value=wrapped_pem_to_config_value(public_key_pem)) else: print(f'Failed to migrate rsa-key "{rsa_name}"') config.delete(rsa_keys_base) if config.exists(ipsec_site_base): for peer in config.list_nodes(ipsec_site_base): mode = config.return_value(ipsec_site_base + [peer, 'authentication', 'mode']) if mode != 'rsa': continue config.set(ipsec_site_base + [peer, 'authentication', 'rsa', 'local-key'], value=local_key_name) remote_key_name = config.return_value(ipsec_site_base + [peer, 'authentication', 'rsa-key-name']) config.set(ipsec_site_base + [peer, 'authentication', 'rsa', 'remote-key'], value=remote_key_name) config.delete(ipsec_site_base + [peer, 'authentication', 'rsa-key-name']) try: with open(file_name, 'w') as f: f.write(config.to_string()) except OSError as e: print("Failed to save the modified config: {}".format(e)) sys.exit(1)