wireguard: T5413: Blocked adding the peer with the router's public key

Disabeled adding the peer with the same public key as the router has.
Added smoketest

1 files changed, 6 insertions, 1 deletions

diff --git a/src/conf_mode/interfaces-wireguard.py b/src/conf_mode/interfaces-wireguard.py
index a02baba82..40404d091 100755
--- a/src/conf_mode/interfaces-wireguard.py
+++ b/src/conf_mode/interfaces-wireguard.py
@@ -1,6 +1,6 @@
 #!/usr/bin/env python3
 #
-# Copyright (C) 2018-2022 VyOS maintainers and contributors
+# Copyright (C) 2018-2023 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
@@ -29,10 +29,12 @@ from vyos.configverify import verify_bond_bridge_member
 from vyos.ifconfig import WireGuardIf
 from vyos.utils.kernel import check_kmod
 from vyos.utils.network import check_port_availability
+from vyos.validate import is_wireguard_key_pair
 from vyos import ConfigError
 from vyos import airbag
 airbag.enable()
 
+
 def get_config(config=None):
     """
     Retrive CLI config as dictionary. Dictionary can never be empty, as at least the
@@ -105,6 +107,9 @@ def verify(wireguard):
         if peer['public_key'] in public_keys:
             raise ConfigError(f'Duplicate public-key defined on peer "{tmp}"')
 
+        if 'disable' not in peer and is_wireguard_key_pair(wireguard['private_key'], peer['public_key']):
+            raise ConfigError(f'Peer "{tmp}" has the same public key as the interface "{wireguard["ifname"]}"')
+
         public_keys.append(peer['public_key'])
 
 def apply(wireguard):