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# Copyright 2021-2024 VyOS maintainers and contributors <maintainers@vyos.io>
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this library. If not, see <http://www.gnu.org/licenses/>.
# T2816: T3642: Move IPSec/L2TP code into vpn_ipsec.py and update to use PKI.
import os
from vyos.configtree import ConfigTree
from vyos.pki import load_certificate
from vyos.pki import load_private_key
from vyos.pki import encode_certificate
from vyos.pki import encode_private_key
from vyos.utils.process import run
base = ['vpn', 'l2tp', 'remote-access', 'ipsec-settings']
pki_base = ['pki']
AUTH_DIR = '/config/auth'
def wrapped_pem_to_config_value(pem):
return "".join(pem.strip().split("\n")[1:-1])
def migrate(config: ConfigTree) -> None:
if not config.exists(base):
return
if not config.exists(base + ['authentication', 'x509']):
return
x509_base = base + ['authentication', 'x509']
pki_name = 'l2tp_remote_access'
if not config.exists(pki_base + ['ca']):
config.set(pki_base + ['ca'])
config.set_tag(pki_base + ['ca'])
if not config.exists(pki_base + ['certificate']):
config.set(pki_base + ['certificate'])
config.set_tag(pki_base + ['certificate'])
if config.exists(x509_base + ['ca-cert-file']):
cert_file = config.return_value(x509_base + ['ca-cert-file'])
cert_path = os.path.join(AUTH_DIR, cert_file)
cert = None
if os.path.isfile(cert_path):
if not os.access(cert_path, os.R_OK):
run(f'sudo chmod 644 {cert_path}')
with open(cert_path, 'r') as f:
cert_data = f.read()
cert = load_certificate(cert_data, wrap_tags=False)
if cert:
cert_pem = encode_certificate(cert)
config.set(pki_base + ['ca', pki_name, 'certificate'], value=wrapped_pem_to_config_value(cert_pem))
config.set(x509_base + ['ca-certificate'], value=pki_name)
else:
print(f'Failed to migrate CA certificate on l2tp remote-access config')
config.delete(x509_base + ['ca-cert-file'])
if config.exists(x509_base + ['crl-file']):
crl_file = config.return_value(x509_base + ['crl-file'])
crl_path = os.path.join(AUTH_DIR, crl_file)
crl = None
if os.path.isfile(crl_path):
if not os.access(crl_path, os.R_OK):
run(f'sudo chmod 644 {crl_path}')
with open(crl_path, 'r') as f:
crl_data = f.read()
crl = load_certificate(crl_data, wrap_tags=False)
if crl:
crl_pem = encode_certificate(crl)
config.set(pki_base + ['ca', pki_name, 'crl'], value=wrapped_pem_to_config_value(crl_pem))
else:
print(f'Failed to migrate CRL on l2tp remote-access config')
config.delete(x509_base + ['crl-file'])
if config.exists(x509_base + ['server-cert-file']):
cert_file = config.return_value(x509_base + ['server-cert-file'])
cert_path = os.path.join(AUTH_DIR, cert_file)
cert = None
if os.path.isfile(cert_path):
if not os.access(cert_path, os.R_OK):
run(f'sudo chmod 644 {cert_path}')
with open(cert_path, 'r') as f:
cert_data = f.read()
cert = load_certificate(cert_data, wrap_tags=False)
if cert:
cert_pem = encode_certificate(cert)
config.set(pki_base + ['certificate', pki_name, 'certificate'], value=wrapped_pem_to_config_value(cert_pem))
config.set(x509_base + ['certificate'], value=pki_name)
else:
print(f'Failed to migrate certificate on l2tp remote-access config')
config.delete(x509_base + ['server-cert-file'])
if config.exists(x509_base + ['server-key-file']):
key_file = config.return_value(x509_base + ['server-key-file'])
key_passphrase = None
if config.exists(x509_base + ['server-key-password']):
key_passphrase = config.return_value(x509_base + ['server-key-password'])
key_path = os.path.join(AUTH_DIR, key_file)
key = None
if os.path.isfile(key_path):
if not os.access(key_path, os.R_OK):
run(f'sudo chmod 644 {key_path}')
with open(key_path, 'r') as f:
key_data = f.read()
key = load_private_key(key_data, passphrase=key_passphrase, wrap_tags=False)
if key:
key_pem = encode_private_key(key, passphrase=key_passphrase)
config.set(pki_base + ['certificate', pki_name, 'private', 'key'], value=wrapped_pem_to_config_value(key_pem))
if key_passphrase:
config.set(pki_base + ['certificate', pki_name, 'private', 'password-protected'])
config.set(x509_base + ['private-key-passphrase'], value=key_passphrase)
else:
print(f'Failed to migrate private key on l2tp remote-access config')
config.delete(x509_base + ['server-key-file'])
if config.exists(x509_base + ['server-key-password']):
config.delete(x509_base + ['server-key-password'])
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