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authorViacheslav Hletenko <v.gletenko@vyos.io>2022-02-10 22:05:19 +0000
committerViacheslav Hletenko <v.gletenko@vyos.io>2022-02-10 22:10:49 +0000
commit7f7be911b749b6c65ac3c6e57192e9e4ce2dcd24 (patch)
treeb13be296f44a0067ff381a93e087873ee69cf18e /src
parentdaf27dde3f3ab52ffb383c141959a548d4a0455d (diff)
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openvpn: T4236: Add generator for ovpn configurations in op-mode
This generator generates client .ovpn files with required initial configuration It gets information from interface vtun, pki ca and certificates
Diffstat (limited to 'src')
-rwxr-xr-xsrc/op_mode/generate_ovpn_client_file.py145
1 files changed, 145 insertions, 0 deletions
diff --git a/src/op_mode/generate_ovpn_client_file.py b/src/op_mode/generate_ovpn_client_file.py
new file mode 100755
index 000000000..29db41e37
--- /dev/null
+++ b/src/op_mode/generate_ovpn_client_file.py
@@ -0,0 +1,145 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2022 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 argparse
+import os
+
+from jinja2 import Template
+
+from vyos.configquery import ConfigTreeQuery
+from vyos.ifconfig import Section
+from vyos.util import cmd
+
+
+client_config = """
+
+client
+nobind
+remote {{ remote_host }} {{ port }}
+remote-cert-tls server
+proto {{ 'tcp-client' if protocol == 'tcp-active' else 'udp' }}
+dev {{ device }}
+dev-type {{ device }}
+persist-key
+persist-tun
+verb 3
+
+# Encryption options
+{% if encryption is defined and encryption is not none %}
+{% if encryption.cipher is defined and encryption.cipher is not none %}
+cipher {{ encryption.cipher }}
+{% if encryption.cipher == 'bf128' %}
+keysize 128
+{% elif encryption.cipher == 'bf256' %}
+keysize 256
+{% endif %}
+{% endif %}
+{% if encryption.ncp_ciphers is defined and encryption.ncp_ciphers is not none %}
+data-ciphers {{ encryption.ncp_ciphers }}
+{% endif %}
+{% endif %}
+
+{% if hash is defined and hash is not none %}
+auth {{ hash }}
+{% endif %}
+keysize 256
+comp-lzo {{ '' if use_lzo_compression is defined else 'no' }}
+
+<ca>
+-----BEGIN CERTIFICATE-----
+{{ ca }}
+-----END CERTIFICATE-----
+
+</ca>
+
+<cert>
+-----BEGIN CERTIFICATE-----
+{{ cert }}
+-----END CERTIFICATE-----
+
+</cert>
+
+<key>
+-----BEGIN PRIVATE KEY-----
+{{ key }}
+-----END PRIVATE KEY-----
+
+</key>
+
+"""
+
+config = ConfigTreeQuery()
+base = ['interfaces', 'openvpn']
+
+if not config.exists(base):
+ print('OpenVPN not configured')
+ exit(0)
+
+
+if __name__ == '__main__':
+ parser = argparse.ArgumentParser()
+ parser.add_argument("-i", "--interface", type=str, help='OpenVPN interface the client is connecting to', required=True)
+ parser.add_argument("-a", "--ca", type=str, help='OpenVPN CA cerificate', required=True)
+ parser.add_argument("-c", "--cert", type=str, help='OpenVPN client cerificate', required=True)
+ parser.add_argument("-k", "--key", type=str, help='OpenVPN client cerificate key', action="store")
+ args = parser.parse_args()
+
+ interface = args.interface
+ ca = args.ca
+ cert = args.cert
+ key = args.key
+ if not key:
+ key = args.cert
+
+ if interface not in Section.interfaces('openvpn'):
+ exit(f'OpenVPN interface "{interface}" does not exist!')
+
+ if not config.exists(['pki', 'ca', ca, 'certificate']):
+ exit(f'OpenVPN CA certificate "{ca}" does not exist!')
+
+ if not config.exists(['pki', 'certificate', cert, 'certificate']):
+ exit(f'OpenVPN certificate "{cert}" does not exist!')
+
+ if not config.exists(['pki', 'certificate', cert, 'private', 'key']):
+ exit(f'OpenVPN certificate key "{key}" does not exist!')
+
+ ca = config.value(['pki', 'ca', ca, 'certificate'])
+ cert = config.value(['pki', 'certificate', cert, 'certificate'])
+ key = config.value(['pki', 'certificate', key, 'private', 'key'])
+ remote_host = config.value(base + [interface, 'local-host'])
+
+ ovpn_conf = config.get_config_dict(base + [interface], key_mangling=('-', '_'), get_first_key=True)
+
+ port = '1194' if 'local_port' not in ovpn_conf else ovpn_conf['local_port']
+ proto = 'udp' if 'protocol' not in ovpn_conf else ovpn_conf['protocol']
+ device = 'tun' if 'device_type' not in ovpn_conf else ovpn_conf['device_type']
+
+ config = {
+ 'interface' : interface,
+ 'ca' : ca,
+ 'cert' : cert,
+ 'key' : key,
+ 'device' : device,
+ 'port' : port,
+ 'proto' : proto,
+ 'remote_host' : remote_host,
+ 'address' : [],
+ }
+
+# Clear out terminal first
+print('\x1b[2J\x1b[H')
+client = Template(client_config, trim_blocks=True).render(config)
+print(client)