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#!/usr/bin/env python3
#
# Copyright (C) 2024 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/>.
#
# Removes --cipher option (deprecated) from OpenVPN configs
# and moves it to --data-ciphers for server and client modes
import sys
from vyos.configtree import ConfigTree
if len(sys.argv) < 2:
print("Must specify file name!")
sys.exit(1)
file_name = sys.argv[1]
with open(file_name, 'r') as f:
config_file = f.read()
config = ConfigTree(config_file)
if not config.exists(['interfaces', 'openvpn']):
# Nothing to do
sys.exit(0)
else:
ovpn_intfs = config.list_nodes(['interfaces', 'openvpn'])
for i in ovpn_intfs:
# Remove 'encryption cipher' and add this value to 'encryption ncp-ciphers'
# for server and client mode.
# Site-to-site mode still can use --cipher option
cipher_path = ['interfaces', 'openvpn', i, 'encryption', 'cipher']
ncp_cipher_path = ['interfaces', 'openvpn', i, 'encryption', 'ncp-ciphers']
if config.exists(cipher_path):
if config.exists(['interfaces', 'openvpn', i, 'shared-secret-key']):
continue
cipher = config.return_value(cipher_path)
config.delete(cipher_path)
if cipher == 'none':
if not config.exists(ncp_cipher_path):
config.delete(['interfaces', 'openvpn', i, 'encryption'])
continue
ncp_ciphers = []
if config.exists(ncp_cipher_path):
ncp_ciphers = config.return_values(ncp_cipher_path)
config.delete(ncp_cipher_path)
# need to add the deleted cipher at the first place in the list
if cipher in ncp_ciphers:
ncp_ciphers.remove(cipher)
ncp_ciphers.insert(0, cipher)
for c in ncp_ciphers:
config.set(ncp_cipher_path, value=c, replace=False)
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)
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