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#!/usr/bin/env python3
#
# Copyright (C) 2019-2024 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/>.
import os
import socket
import sys
import json
from time import sleep
from vyos.base import Warning
from vyos.config import Config
from vyos.config import config_dict_merge
from vyos.configdiff import get_config_diff
from vyos.configverify import verify_vrf
from vyos.defaults import api_config_state
from vyos.pki import wrap_certificate
from vyos.pki import wrap_private_key
from vyos.pki import wrap_dh_parameters
from vyos.pki import load_dh_parameters
from vyos.template import render
from vyos.utils.dict import dict_search
from vyos.utils.process import call
from vyos.utils.process import is_systemd_service_active
from vyos.utils.network import check_port_availability
from vyos.utils.network import is_listen_port_bind_service
from vyos.utils.file import write_file
from vyos import ConfigError
from vyos import airbag
airbag.enable()
config_file = '/etc/nginx/sites-enabled/default'
systemd_override = r'/run/systemd/system/nginx.service.d/override.conf'
cert_dir = '/run/nginx/certs'
user = 'www-data'
group = 'www-data'
systemd_service_api = '/run/systemd/system/vyos-http-api.service'
def get_config(config=None):
if config:
conf = config
else:
conf = Config()
base = ['service', 'https']
if not conf.exists(base):
return None
https = conf.get_config_dict(base, get_first_key=True,
key_mangling=('-', '_'),
with_pki=True)
# store path to API config file for later use in templates
https['api_config_state'] = api_config_state
# get fully qualified system hsotname
https['hostname'] = socket.getfqdn()
# We have gathered the dict representation of the CLI, but there are default
# options which we need to update into the dictionary retrived.
default_values = conf.get_config_defaults(**https.kwargs, recursive=True)
if 'api' not in https or 'graphql' not in https['api']:
del default_values['api']
# merge CLI and default dictionary
https = config_dict_merge(default_values, https)
return https
def verify(https):
if https is None:
return None
if 'certificates' in https and 'certificate' in https['certificates']:
cert_name = https['certificates']['certificate']
if 'pki' not in https:
raise ConfigError('PKI is not configured!')
if cert_name not in https['pki']['certificate']:
raise ConfigError('Invalid certificate in configuration!')
pki_cert = https['pki']['certificate'][cert_name]
if 'certificate' not in pki_cert:
raise ConfigError('Missing certificate in configuration!')
if 'private' not in pki_cert or 'key' not in pki_cert['private']:
raise ConfigError('Missing certificate private key in configuration!')
if 'dh_params' in https['certificates']:
dh_name = https['certificates']['dh_params']
if dh_name not in https['pki']['dh']:
raise ConfigError('Invalid DH parameter in configuration!')
pki_dh = https['pki']['dh'][dh_name]
dh_params = load_dh_parameters(pki_dh['parameters'])
dh_numbers = dh_params.parameter_numbers()
dh_bits = dh_numbers.p.bit_length()
if dh_bits < 2048:
raise ConfigError(f'Minimum DH key-size is 2048 bits')
else:
Warning('No certificate specified, using build-in self-signed certificates. '\
'Do not use them in a production environment!')
# Check if server port is already in use by a different appliaction
listen_address = ['0.0.0.0']
port = int(https['port'])
if 'listen_address' in https:
listen_address = https['listen_address']
for address in listen_address:
if not check_port_availability(address, port, 'tcp') and not is_listen_port_bind_service(port, 'nginx'):
raise ConfigError(f'TCP port "{port}" is used by another service!')
verify_vrf(https)
# Verify API server settings, if present
if 'api' in https:
keys = dict_search('api.keys.id', https)
gql_auth_type = dict_search('api.graphql.authentication.type', https)
# If "api graphql" is not defined and `gql_auth_type` is None,
# there's certainly no JWT auth option, and keys are required
jwt_auth = (gql_auth_type == "token")
# Check for incomplete key configurations in every case
valid_keys_exist = False
if keys:
for k in keys:
if 'key' not in keys[k]:
raise ConfigError(f'Missing HTTPS API key string for key id "{k}"')
else:
valid_keys_exist = True
# If only key-based methods are enabled,
# fail the commit if no valid key configurations are found
if (not valid_keys_exist) and (not jwt_auth):
raise ConfigError('At least one HTTPS API key is required unless GraphQL token authentication is enabled!')
if (not valid_keys_exist) and jwt_auth:
Warning(f'API keys are not configured: classic (non-GraphQL) API will be unavailable!')
return None
def generate(https):
if https is None:
for file in [systemd_service_api, config_file, systemd_override]:
if os.path.exists(file):
os.unlink(file)
return None
if 'api' in https:
render(systemd_service_api, 'https/vyos-http-api.service.j2', https)
with open(api_config_state, 'w') as f:
json.dump(https['api'], f, indent=2)
else:
if os.path.exists(systemd_service_api):
os.unlink(systemd_service_api)
# get certificate data
if 'certificates' in https and 'certificate' in https['certificates']:
cert_name = https['certificates']['certificate']
pki_cert = https['pki']['certificate'][cert_name]
cert_path = os.path.join(cert_dir, f'{cert_name}_cert.pem')
key_path = os.path.join(cert_dir, f'{cert_name}_key.pem')
server_cert = str(wrap_certificate(pki_cert['certificate']))
# Append CA certificate if specified to form a full chain
if 'ca_certificate' in https['certificates']:
ca_cert = https['certificates']['ca_certificate']
server_cert += '\n' + str(wrap_certificate(https['pki']['ca'][ca_cert]['certificate']))
write_file(cert_path, server_cert, user=user, group=group, mode=0o644)
write_file(key_path, wrap_private_key(pki_cert['private']['key']),
user=user, group=group, mode=0o600)
tmp_path = {'cert_path': cert_path, 'key_path': key_path}
if 'dh_params' in https['certificates']:
dh_name = https['certificates']['dh_params']
pki_dh = https['pki']['dh'][dh_name]
if 'parameters' in pki_dh:
dh_path = os.path.join(cert_dir, f'{dh_name}_dh.pem')
write_file(dh_path, wrap_dh_parameters(pki_dh['parameters']),
user=user, group=group, mode=0o600)
tmp_path.update({'dh_file' : dh_path})
https['certificates'].update(tmp_path)
render(config_file, 'https/nginx.default.j2', https)
render(systemd_override, 'https/override.conf.j2', https)
return None
def apply(https):
# Reload systemd manager configuration
call('systemctl daemon-reload')
http_api_service_name = 'vyos-http-api.service'
https_service_name = 'nginx.service'
if https is None:
call(f'systemctl stop {http_api_service_name}')
call(f'systemctl stop {https_service_name}')
return
if 'api' in https:
call(f'systemctl reload-or-restart {http_api_service_name}')
# Let uvicorn settle before (possibly) restarting nginx
sleep(1)
elif is_systemd_service_active(http_api_service_name):
call(f'systemctl stop {http_api_service_name}')
call(f'systemctl reload-or-restart {https_service_name}')
if __name__ == '__main__':
try:
c = get_config()
verify(c)
generate(c)
apply(c)
except ConfigError as e:
print(e)
sys.exit(1)
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