1 files changed, 118 insertions, 0 deletions
diff --git a/src/op_mode/wireguard_client.py b/src/op_mode/wireguard_client.py
new file mode 100755
index 000000000..7a620a01e
--- /dev/null
+++ b/src/op_mode/wireguard_client.py
@@ -0,0 +1,118 @@
+#!/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/>.
+
+import argparse
+import os
+
+from jinja2 import Template
+from ipaddress import ip_interface
+
+from vyos.ifconfig import Section
+from vyos.template import is_ipv4
+from vyos.template import is_ipv6
+from vyos.util import cmd
+from vyos.util import popen
+
+if os.geteuid() != 0:
+    exit("You need to have root privileges to run this script.\nPlease try again, this time using 'sudo'. Exiting.")
+
+server_config = """WireGuard client configuration for interface: {{ interface }}
+
+To enable this configuration on a VyOS router you can use the following commands:
+
+=== VyOS (server) configurtation ===
+
+{% for addr in address if address is defined %}
+set interfaces wireguard {{ interface }} peer {{ name }} allowed-ips '{{ addr }}'
+{% endfor %}
+set interfaces wireguard {{ interface }} peer {{ name }} pubkey '{{ pubkey }}'
+"""
+
+client_config = """
+=== RoadWarrior (client) configuration ===
+
+[Interface]
+PrivateKey = {{ privkey }}
+{% if address is defined and address|length > 0 %}
+Address = {{ address | join(', ')}}
+{% endif %}
+DNS = 1.1.1.1
+
+[Peer]
+PublicKey = {{ system_pubkey }}
+Endpoint = {{ server }}:{{ port }}
+AllowedIPs = 0.0.0.0/0, ::/0
+
+"""
+
+if __name__ == '__main__':
+    parser = argparse.ArgumentParser()
+    parser.add_argument("-n", "--name", type=str, help='WireGuard peer name', required=True)
+    parser.add_argument("-i", "--interface", type=str, help='WireGuard interface the client is connecting to', required=True)
+    parser.add_argument("-s", "--server", type=str, help='WireGuard server IPv4/IPv6 address or FQDN', required=True)
+    parser.add_argument("-a", "--address", type=str, help='WireGuard client IPv4/IPv6 address', action='append')
+    args = parser.parse_args()
+
+    interface = args.interface
+    if interface not in Section.interfaces('wireguard'):
+        exit(f'WireGuard interface "{interface}" does not exist!')
+
+    wg_pubkey = cmd(f'wg show {interface} | grep "public key"').split(':')[-1].lstrip()
+    wg_port = cmd(f'wg show {interface} | grep "listening port"').split(':')[-1].lstrip()
+
+    # Generate WireGuard private key
+    privkey,_ = popen('wg genkey')
+    # Generate public key portion from given private key
+    pubkey,_ = popen('wg pubkey', input=privkey)
+
+    config = {
+        'name' : args.name,
+        'interface' : interface,
+        'system_pubkey' : wg_pubkey,
+        'privkey': privkey,
+        'pubkey' : pubkey,
+        'server' : args.server,
+        'port' : wg_port,
+        'address' : [],
+    }
+
+    if args.address:
+        v4_addr = 0
+        v6_addr = 0
+        for tmp in args.address:
+            try:
+                ip = str(ip_interface(tmp).ip)
+                if is_ipv4(tmp):
+                    config['address'].append(f'{ip}/32')
+                    v4_addr += 1
+                elif is_ipv6(tmp):
+                    config['address'].append(f'{ip}/128')
+                    v6_addr += 1
+            except:
+                print(tmp)
+                exit('Client IP address invalid!')
+
+        if (v4_addr > 1) or (v6_addr > 1):
+            exit('Client can only have one IPv4 and one IPv6 address.')
+
+    # Clear out terminal first
+    print('\x1b[2J\x1b[H')
+    server = Template(server_config, trim_blocks=True).render(config)
+    print(server)
+    client = Template(client_config, trim_blocks=True).render(config)
+    print(client)
+    qrcode,err = popen('qrencode -t ansiutf8', input=client)
+    print(qrcode)