diff options
Diffstat (limited to 'src/conf_mode/vpn_ipsec.py')
| -rwxr-xr-x | src/conf_mode/vpn_ipsec.py | 56 |
1 files changed, 42 insertions, 14 deletions
diff --git a/src/conf_mode/vpn_ipsec.py b/src/conf_mode/vpn_ipsec.py index e22b7550c..2754314f7 100755 --- a/src/conf_mode/vpn_ipsec.py +++ b/src/conf_mode/vpn_ipsec.py @@ -1,6 +1,6 @@ #!/usr/bin/env python3 # -# Copyright (C) 2021-2024 VyOS maintainers and contributors +# Copyright (C) 2021-2025 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 @@ -64,6 +64,7 @@ swanctl_dir = '/etc/swanctl' charon_conf = '/etc/strongswan.d/charon.conf' charon_dhcp_conf = '/etc/strongswan.d/charon/dhcp.conf' charon_radius_conf = '/etc/strongswan.d/charon/eap-radius.conf' +charon_systemd_conf = '/etc/strongswan.d/charon-systemd.conf' interface_conf = '/etc/strongswan.d/interfaces_use.conf' swanctl_conf = f'{swanctl_dir}/swanctl.conf' @@ -86,8 +87,6 @@ def get_config(config=None): conf = Config() base = ['vpn', 'ipsec'] l2tp_base = ['vpn', 'l2tp', 'remote-access', 'ipsec-settings'] - if not conf.exists(base): - return None # retrieve common dictionary keys ipsec = conf.get_config_dict(base, key_mangling=('-', '_'), @@ -95,6 +94,14 @@ def get_config(config=None): get_first_key=True, with_pki=True) + ipsec['nhrp_exists'] = conf.exists(['protocols', 'nhrp', 'tunnel']) + if ipsec['nhrp_exists']: + set_dependents('nhrp', conf) + + if not conf.exists(base): + ipsec.update({'deleted' : ''}) + return ipsec + # We have to cleanup the default dict, as default values could # enable features which are not explicitly enabled on the # CLI. E.g. dead-peer-detection defaults should not be injected @@ -115,7 +122,6 @@ def get_config(config=None): ipsec['dhcp_no_address'] = {} ipsec['install_routes'] = 'no' if conf.exists(base + ["options", "disable-route-autoinstall"]) else default_install_routes ipsec['interface_change'] = leaf_node_changed(conf, base + ['interface']) - ipsec['nhrp_exists'] = conf.exists(['protocols', 'nhrp', 'tunnel']) if ipsec['nhrp_exists']: set_dependents('nhrp', conf) @@ -151,6 +157,8 @@ def get_config(config=None): _, vti = get_interface_dict(conf, ['interfaces', 'vti'], vti_interface) ipsec['vti_interface_dicts'][vti_interface] = vti + ipsec['vpp_ipsec_exists'] = conf.exists(['vpp', 'settings', 'ipsec']) + return ipsec def get_dhcp_address(iface): @@ -196,8 +204,8 @@ def verify_pki_rsa(pki, rsa_conf): return True def verify(ipsec): - if not ipsec: - return None + if not ipsec or 'deleted' in ipsec: + return if 'authentication' in ipsec: if 'psk' in ipsec['authentication']: @@ -479,6 +487,17 @@ def verify(ipsec): else: raise ConfigError(f"Missing ike-group on site-to-site peer {peer}") + # verify encryption algorithm compatibility for IKE with VPP + if ipsec['vpp_ipsec_exists']: + ike_group = ipsec['ike_group'][peer_conf['ike_group']] + for proposal, proposal_config in ike_group.get('proposal', {}).items(): + algs = ['gmac', 'serpent', 'twofish'] + if any(alg in proposal_config['encryption'] for alg in algs): + raise ConfigError( + f'Encryption algorithm {proposal_config["encryption"]} cannot be used ' + f'for IKE proposal {proposal} for site-to-site peer {peer} with VPP' + ) + if 'authentication' not in peer_conf or 'mode' not in peer_conf['authentication']: raise ConfigError(f"Missing authentication on site-to-site peer {peer}") @@ -557,7 +576,7 @@ def verify(ipsec): esp_group_name = tunnel_conf['esp_group'] if 'esp_group' in tunnel_conf else peer_conf['default_esp_group'] - if esp_group_name not in ipsec['esp_group']: + if esp_group_name not in ipsec.get('esp_group'): raise ConfigError(f"Invalid esp-group on tunnel {tunnel} for site-to-site peer {peer}") esp_group = ipsec['esp_group'][esp_group_name] @@ -569,6 +588,18 @@ def verify(ipsec): if ('local' in tunnel_conf and 'prefix' in tunnel_conf['local']) or ('remote' in tunnel_conf and 'prefix' in tunnel_conf['remote']): raise ConfigError(f"Local/remote prefix cannot be used with ESP transport mode on tunnel {tunnel} for site-to-site peer {peer}") + # verify ESP encryption algorithm compatibility with VPP + # because Marvel plugin for VPP doesn't support all algorithms that Strongswan does + if ipsec['vpp_ipsec_exists']: + for proposal, proposal_config in esp_group.get('proposal', {}).items(): + algs = ['aes128', 'aes192', 'aes256', 'aes128gcm128', 'aes192gcm128', 'aes256gcm128'] + if proposal_config['encryption'] not in algs: + raise ConfigError( + f'Encryption algorithm {proposal_config["encryption"]} cannot be used ' + f'for ESP proposal {proposal} on tunnel {tunnel} for site-to-site peer {peer} with VPP' + ) + + def cleanup_pki_files(): for path in [CERT_PATH, CA_PATH, CRL_PATH, KEY_PATH, PUBKEY_PATH]: if not os.path.exists(path): @@ -624,7 +655,7 @@ def generate_pki_files_rsa(pki, rsa_conf): def generate(ipsec): cleanup_pki_files() - if not ipsec: + if not ipsec or 'deleted' in ipsec: for config_file in [charon_dhcp_conf, charon_radius_conf, interface_conf, swanctl_conf]: if os.path.isfile(config_file): os.unlink(config_file) @@ -715,21 +746,19 @@ def generate(ipsec): render(charon_conf, 'ipsec/charon.j2', ipsec) render(charon_dhcp_conf, 'ipsec/charon/dhcp.conf.j2', ipsec) render(charon_radius_conf, 'ipsec/charon/eap-radius.conf.j2', ipsec) + render(charon_systemd_conf, 'ipsec/charon_systemd.conf.j2', ipsec) render(interface_conf, 'ipsec/interfaces_use.conf.j2', ipsec) render(swanctl_conf, 'ipsec/swanctl.conf.j2', ipsec) def apply(ipsec): systemd_service = 'strongswan.service' - if not ipsec: + if not ipsec or 'deleted' in ipsec: call(f'systemctl stop {systemd_service}') - if vti_updown_db_exists(): remove_vti_updown_db() - else: call(f'systemctl reload-or-restart {systemd_service}') - if ipsec['enabled_vti_interfaces']: with open_vti_updown_db_for_create_or_update() as db: db.removeAllOtherInterfaces(ipsec['enabled_vti_interfaces']) @@ -737,7 +766,7 @@ def apply(ipsec): db.commit(lambda interface: ipsec['vti_interface_dicts'][interface]) elif vti_updown_db_exists(): remove_vti_updown_db() - + if ipsec: if ipsec.get('nhrp_exists', False): try: call_dependents() @@ -746,7 +775,6 @@ def apply(ipsec): # ConfigError("ConfigError('Interface ethN requires an IP address!')") pass - if __name__ == '__main__': try: ipsec = get_config() |