diff options
Diffstat (limited to 'src/conf_mode')
| -rwxr-xr-x | src/conf_mode/vpn_ipsec.py | 424 | ||||
| -rwxr-xr-x | src/conf_mode/vpn_rsa-keys.py | 110 |
2 files changed, 519 insertions, 15 deletions
diff --git a/src/conf_mode/vpn_ipsec.py b/src/conf_mode/vpn_ipsec.py index 969266c30..a1c36ea3b 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) 2020 VyOS maintainers and contributors +# 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 @@ -16,52 +16,446 @@ import os +from copy import deepcopy +from subprocess import DEVNULL from sys import exit +from time import sleep from vyos.config import Config +from vyos.configdiff import ConfigDiff from vyos.template import render -from vyos.util import call -from vyos.util import dict_search +from vyos.util import call, get_interface_address, process_named_running, run, cidr_fit from vyos import ConfigError from vyos import airbag -from pprint import pprint airbag.enable() +authby_translate = { + 'pre-shared-secret': 'secret', + 'rsa': 'rsasig', + 'x509': 'rsasig' +} +default_pfs = 'dh-group2' +pfs_translate = { + 'dh-group1': 'modp768', + 'dh-group2': 'modp1024', + 'dh-group5': 'modp1536', + 'dh-group14': 'modp2048', + 'dh-group15': 'modp3072', + 'dh-group16': 'modp4096', + 'dh-group17': 'modp6144', + 'dh-group18': 'modp8192', + 'dh-group19': 'ecp256', + 'dh-group20': 'ecp384', + 'dh-group21': 'ecp512', + 'dh-group22': 'modp1024s160', + 'dh-group23': 'modp2048s224', + 'dh-group24': 'modp2048s256', + 'dh-group25': 'ecp192', + 'dh-group26': 'ecp224', + 'dh-group27': 'ecp224bp', + 'dh-group28': 'ecp256bp', + 'dh-group29': 'ecp384bp', + 'dh-group30': 'ecp512bp', + 'dh-group31': 'curve25519', + 'dh-group32': 'curve448' +} + +ike_ciphers = {} +esp_ciphers = {} + +marks = {} +mark_base = 0x900000 +mark_index = 1 + +CA_PATH = "/etc/ipsec.d/cacerts" +CRL_PATH = "/etc/ipsec.d/crls" + +DHCP_BASE = "/var/lib/dhcp/dhclient" + +LOCAL_KEY_PATHS = ['/config/auth/', '/config/ipsec.d/rsa-keys/'] +X509_PATH = '/config/auth/' + +conf = None + +def resync_l2tp(conf): + if not conf.exists('vpn l2tp remote-access ipsec-settings '): + return + + tmp = run('/usr/libexec/vyos/conf_mode/ipsec-settings.py') + if tmp > 0: + print('ERROR: failed to reapply L2TP IPSec settings!') + +def resync_nhrp(conf): + if not conf.exists('protocols nhrp tunnel'): + return + + run('/opt/vyatta/sbin/vyos-update-nhrp.pl --set_ipsec') + def get_config(config=None): + global conf if config: conf = config else: conf = Config() - base = ['vpn', 'nipsec'] + base = ['vpn', 'ipsec'] if not conf.exists(base): return None # retrieve common dictionary keys - ipsec = conf.get_config_dict(base, key_mangling=('-', '_'), get_first_key=True) + ipsec = conf.get_config_dict(base, key_mangling=('-', '_'), get_first_key=True, no_tag_node_value_mangle=True) + + default_ike_pfs = None + + if 'ike_group' in ipsec: + for group, ike_conf in ipsec['ike_group'].items(): + if 'proposal' in ike_conf: + ciphers = [] + for i in ike_conf['proposal']: + proposal = ike_conf['proposal'][i] + enc = proposal['encryption'] if 'encryption' in proposal else None + hash = proposal['hash'] if 'hash' in proposal else None + pfs = ('dh-group' + proposal['dh_group']) if 'dh_group' in proposal else default_pfs + + if not default_ike_pfs: + default_ike_pfs = pfs + + if enc and hash: + ciphers.append(f"{enc}-{hash}-{pfs_translate[pfs]}" if pfs else f"{enc}-{hash}") + ike_ciphers[group] = ','.join(ciphers) + '!' + + if 'esp_group' in ipsec: + for group, esp_conf in ipsec['esp_group'].items(): + pfs = esp_conf['pfs'] if 'pfs' in esp_conf else 'enable' + + if pfs == 'disable': + pfs = None + + if pfs == 'enable': + pfs = default_ike_pfs + + if 'proposal' in esp_conf: + ciphers = [] + for i in esp_conf['proposal']: + proposal = esp_conf['proposal'][i] + enc = proposal['encryption'] if 'encryption' in proposal else None + hash = proposal['hash'] if 'hash' in proposal else None + if enc and hash: + ciphers.append(f"{enc}-{hash}-{pfs_translate[pfs]}" if pfs else f"{enc}-{hash}") + esp_ciphers[group] = ','.join(ciphers) + '!' + return ipsec def verify(ipsec): if not ipsec: return None + if 'profile' in ipsec: + for profile, profile_conf in ipsec['profile'].items(): + if 'esp_group' in profile_conf: + if 'esp_group' not in ipsec or profile_conf['esp_group'] not in ipsec['esp_group']: + raise ConfigError(f"Invalid esp-group on {profile} profile") + else: + raise ConfigError(f"Missing esp-group on {profile} profile") + + if 'ike_group' in profile_conf: + if 'ike_group' not in ipsec or profile_conf['ike_group'] not in ipsec['ike_group']: + raise ConfigError(f"Invalid ike-group on {profile} profile") + else: + raise ConfigError(f"Missing ike-group on {profile} profile") + + if 'authentication' not in profile_conf: + raise ConfigError(f"Missing authentication on {profile} profile") + + if 'site_to_site' in ipsec and 'peer' in ipsec['site_to_site']: + for peer, peer_conf in ipsec['site_to_site']['peer'].items(): + has_default_esp = False + if 'default_esp_group' in peer_conf: + has_default_esp = True + if 'esp_group' not in ipsec or peer_conf['default_esp_group'] not in ipsec['esp_group']: + raise ConfigError(f"Invalid esp-group on site-to-site peer {peer}") + + if 'ike_group' in peer_conf: + if 'ike_group' not in ipsec or peer_conf['ike_group'] not in ipsec['ike_group']: + raise ConfigError(f"Invalid ike-group on site-to-site peer {peer}") + else: + raise ConfigError(f"Missing ike-group on site-to-site peer {peer}") + + if 'authentication' not in peer_conf or 'mode' not in peer_conf['authentication']: + raise ConfigError(f"Missing authentication on site-to-site peer {peer}") + + if peer_conf['authentication']['mode'] == 'x509': + if 'x509' not in peer_conf['authentication']: + raise ConfigError(f"Missing x509 settings on site-to-site peer {peer}") + + if 'key' not in peer_conf['authentication']['x509'] or 'ca_cert_file' not in peer_conf['authentication']['x509'] or 'cert_file' not in peer_conf['authentication']['x509']: + raise ConfigError(f"Missing x509 settings on site-to-site peer {peer}") + + if 'file' not in peer_conf['authentication']['x509']['key']: + raise ConfigError(f"Missing x509 settings on site-to-site peer {peer}") + + for key in ['ca_cert_file', 'cert_file', 'crl_file']: + if key in peer_conf['authentication']['x509']: + path = peer_conf['authentication']['x509'][key] + if not os.path.exists(path if path.startswith(X509_PATH) else (X509_PATH + path)): + raise ConfigError(f"File not found for {key} on site-to-site peer {peer}") + + key_path = peer_conf['authentication']['x509']['key']['file'] + if not os.path.exists(key_path if key_path.startswith(X509_PATH) else (X509_PATH + key_path)): + raise ConfigError(f"Private key not found on site-to-site peer {peer}") + + if peer_conf['authentication']['mode'] == 'rsa': + if not verify_rsa_local_key(): + raise ConfigError(f"Invalid key on rsa-keys local-key") + + if 'rsa_key_name' not in peer_conf['authentication']: + raise ConfigError(f"Missing rsa-key-name on site-to-site peer {peer}") + + if not verify_rsa_key(peer_conf['authentication']['rsa_key_name']): + raise ConfigError(f"Invalid rsa-key-name on site-to-site peer {peer}") + + if 'local_address' not in peer_conf and 'dhcp_interface' not in peer_conf: + raise ConfigError(f"Missing local-address or dhcp-interface on site-to-site peer {peer}") + + if 'dhcp_interface' in peer_conf: + dhcp_interface = peer_conf['dhcp_interface'] + if not os.path.exists(f'{DHCP_BASE}_{dhcp_interface}.conf'): + raise ConfigError(f"Invalid dhcp-interface on site-to-site peer {peer}") + + if 'vti' in peer_conf: + if 'local_address' in peer_conf and 'dhcp_interface' in peer_conf: + raise ConfigError(f"A single local-address or dhcp-interface is required when using VTI on site-to-site peer {peer}") + + if 'bind' in peer_conf['vti']: + vti_interface = peer_conf['vti']['bind'] + if not get_vti_interface(vti_interface): + raise ConfigError(f'Invalid VTI interface on site-to-site peer {peer}') + + if 'vti' not in peer_conf and 'tunnel' not in peer_conf: + raise ConfigError(f"No vti or tunnels specified on site-to-site peer {peer}") + + if 'tunnel' in peer_conf: + for tunnel, tunnel_conf in peer_conf['tunnel'].items(): + if 'esp_group' not in tunnel_conf and not has_default_esp: + raise ConfigError(f"Missing esp-group on tunnel {tunnel} for site-to-site peer {peer}") + + 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']: + raise ConfigError(f"Invalid esp-group on tunnel {tunnel} for site-to-site peer {peer}") + + esp_group = ipsec['esp_group'][esp_group_name] + + if 'mode' in esp_group and esp_group['mode'] == 'transport': + if 'protocol' in tunnel_conf and ((peer in ['any', '0.0.0.0']) or ('local_address' not in peer_conf or peer_conf['local_address'] in ['any', '0.0.0.0'])): + raise ConfigError(f"Fixed local-address or peer required when a protocol is defined with ESP transport mode on tunnel {tunnel} for site-to-site peer {peer}") + + 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}") + +def get_rsa_local_key(): + global conf + base = ['vpn', 'rsa-keys'] + if not conf.exists(base + ['local-key', 'file']): + return False + + return conf.return_value(base + ['local-key', 'file']) + +def verify_rsa_local_key(): + file = get_rsa_local_key() + + if not file: + return False + + for path in LOCAL_KEY_PATHS: + if os.path.exists(path + file): + return path + file + + return False + +def verify_rsa_key(key_name): + global conf + base = ['vpn', 'rsa-keys'] + if not conf.exists(base): + return False + return conf.exists(base + ['rsa-key-name', key_name, 'rsa-key']) + def generate(ipsec): - if not ipsec: - return None + data = {} - return ipsec + if ipsec: + data = deepcopy(ipsec) + + if 'site_to_site' in data and 'peer' in data['site_to_site']: + for peer, peer_conf in ipsec['site_to_site']['peer'].items(): + if peer_conf['authentication']['mode'] == 'x509': + ca_cert_file = peer_conf['authentication']['x509']['ca_cert_file'] + crl_file = peer_conf['authentication']['x509']['crl_file'] if 'crl_file' in peer_conf['authentication']['x509'] else None + + if not ca_cert_file.startswith(X509_PATH): + ca_cert_file = (X509_PATH + ca_cert_file) + + if crl_file and not crl_file.startswith(X509_PATH): + crl_file = (X509_PATH + crl_file) + + call(f'cp -f {ca_cert_file} {CA_PATH}/') + if crl_file: + call(f'cp -f {crl_file} {CRL_PATH}/') + + local_ip = '' + if 'local_address' in peer_conf: + local_ip = peer_conf['local_address'] + elif 'dhcp_interface' in peer_conf: + local_ip = get_dhcp_address(peer_conf['dhcp_interface']) + + data['site_to_site']['peer'][peer]['local_address'] = local_ip + + if 'vti' in peer_conf and 'bind' in peer_conf['vti']: + vti_interface = peer_conf['vti']['bind'] + get_mark(vti_interface) + else: + for tunnel, tunnel_conf in peer_conf['tunnel'].items(): + if ('local' not in tunnel_conf or 'prefix' not in tunnel_conf['local']) or ('remote' not in tunnel_conf or 'prefix' not in tunnel_conf['remote']): + continue + local_prefix = tunnel_conf['local']['prefix'] + remote_prefix = tunnel_conf['remote']['prefix'] + passthrough = cidr_fit(local_prefix, remote_prefix) + data['site_to_site']['peer'][peer]['tunnel'][tunnel]['passthrough'] = passthrough + + data['authby'] = authby_translate + data['ciphers'] = {'ike': ike_ciphers, 'esp': esp_ciphers} + data['marks'] = marks + data['rsa_local_key'] = verify_rsa_local_key() + data['x509_path'] = X509_PATH + + if 'logging' in ipsec and 'log_modes' in ipsec['logging']: + modes = ipsec['logging']['log_modes'] + level = ipsec['logging']['log_level'] if 'log_level' in ipsec['logging'] else '1' + if isinstance(modes, str): modes = [modes] + if 'any' in modes: + modes = ['dmn', 'mgr', 'ike', 'chd', 'job', 'cfg', 'knl', 'net', 'asn', 'enc', 'lib', 'esp', 'tls', 'tnc', 'imc', 'imv', 'pts'] + data['charondebug'] = f' {level}, '.join(modes) + ' ' + level + + render("/etc/ipsec.conf", "ipsec/ipsec.conf.tmpl", data) + render("/etc/ipsec.secrets", "ipsec/ipsec.secrets.tmpl", data) + render("/etc/swanctl/swanctl.conf", "ipsec/swanctl.conf.tmpl", data) def apply(ipsec): if not ipsec: - return None + if conf.exists('vpn l2tp '): + call('sudo /usr/sbin/ipsec rereadall') + call('sudo /usr/sbin/ipsec reload') + call('sudo /usr/sbin/swanctl -q') + else: + call('sudo /usr/sbin/ipsec stop') + cleanup_vti_interfaces() + resync_l2tp(conf) + resync_nhrp(conf) + return + + diff = ConfigDiff(conf, key_mangling=('-', '_')) + diff.set_level(['vpn', 'ipsec']) + + old_if, new_if = diff.get_value_diff(['ipsec-interfaces', 'interface']) + interface_change = (old_if != new_if) + + should_start = ('profile' in ipsec or ('site_to_site' in ipsec and 'peer' in ipsec['site_to_site'])) + + if should_start: + apply_vti_interfaces(ipsec) + else: + cleanup_vti_interfaces() + + if not process_named_running('charon'): + args = '' + if 'auto_update' in ipsec: + args = f'--auto-update {ipsec["auto_update"]}' + + if should_start: + call(f'sudo /usr/sbin/ipsec start {args}') + else: + if not should_start: + call('sudo /usr/sbin/ipsec stop') + elif interface_change: + call('sudo /usr/sbin/ipsec restart') + else: + call('sudo /usr/sbin/ipsec rereadall') + call('sudo /usr/sbin/ipsec reload') + + if should_start: + sleep(2) # Give charon enough time to start + call('sudo /usr/sbin/swanctl -q') - pprint(ipsec) + resync_l2tp(conf) + resync_nhrp(conf) + +def apply_vti_interfaces(ipsec): + # While vyatta-vti-config.pl is still active, this interface will get deleted by cleanupVtiNotConfigured() + if 'site_to_site' in ipsec and 'peer' in ipsec['site_to_site']: + for peer, peer_conf in ipsec['site_to_site']['peer'].items(): + if 'vti' in peer_conf and 'bind' in peer_conf['vti']: + vti_interface = peer_conf['vti']['bind'] + vti_conf = get_vti_interface(vti_interface) + if not vti_conf: + continue + vti_mtu = vti_conf['mtu'] if 'mtu' in vti_conf else 1500 + mark = get_mark(vti_interface) + + local_ip = '' + if 'local_address' in peer_conf: + local_ip = peer_conf['local_address'] + elif 'dhcp_interface' in peer_conf: + local_ip = get_dhcp_address(peer_conf['dhcp_interface']) + + call(f'sudo /usr/sbin/ip link delete {vti_interface} type vti', stderr=DEVNULL) + call(f'sudo /usr/sbin/ip link add {vti_interface} type vti local {local_ip} remote {peer} okey {mark} ikey {mark}') + call(f'sudo /usr/sbin/ip link set {vti_interface} mtu {vti_mtu}') + if 'address' in vti_conf: + address = vti_conf['address'] + if isinstance(address, list): + for addr in address: + call(f'sudo /usr/sbin/ip addr add {addr} dev {vti_interface}') + else: + call(f'sudo /usr/sbin/ip addr add {address} dev {vti_interface}') + + if 'description' in vti_conf: + description = vti_conf['description'] + call(f'sudo echo "{description}" > /sys/class/net/{vti_interface}/ifalias') + +def get_vti_interface(vti_interface): + global conf + section = conf.get_config_dict(['interfaces', 'vti'], get_first_key=True) + for interface, interface_conf in section.items(): + if interface == vti_interface: + return interface_conf + return None + +def cleanup_vti_interfaces(): + global conf + section = conf.get_config_dict(['interfaces', 'vti'], get_first_key=True) + for interface, interface_conf in section.items(): + call(f'sudo /usr/sbin/ip link delete {interface} type vti', stderr=DEVNULL) + +def get_mark(vti_interface): + global mark_base, mark_index + if vti_interface not in marks: + marks[vti_interface] = mark_base + mark_index + mark_index += 1 + return marks[vti_interface] + +def get_dhcp_address(interface): + addr = get_interface_address(interface) + if not addr: + return None + if len(addr['addr_info']) == 0: + return None + return addr['addr_info'][0]['local'] if __name__ == '__main__': try: - c = get_config() - verify(c) - generate(c) - apply(c) + ipsec = get_config() + verify(ipsec) + generate(ipsec) + apply(ipsec) except ConfigError as e: print(e) exit(1) diff --git a/src/conf_mode/vpn_rsa-keys.py b/src/conf_mode/vpn_rsa-keys.py new file mode 100755 index 000000000..a0e2e2690 --- /dev/null +++ b/src/conf_mode/vpn_rsa-keys.py @@ -0,0 +1,110 @@ +#!/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 base64 +import os +import struct + +from sys import exit + +from vyos.config import Config +from vyos.util import call +from vyos import ConfigError +from vyos import airbag +from Crypto.PublicKey.RSA import construct + +airbag.enable() + +LOCAL_KEY_PATHS = ['/config/auth/', '/config/ipsec.d/rsa-keys/'] +LOCAL_OUTPUT = '/etc/ipsec.d/certs/localhost.pub' + +def get_config(config=None): + if config: + conf = config + else: + conf = Config() + base = ['vpn', 'rsa-keys'] + if not conf.exists(base): + return None + + return conf.get_config_dict(base, key_mangling=('-', '_'), get_first_key=True, no_tag_node_value_mangle=True) + +def verify(conf): + if not conf: + return + + if 'local_key' in conf and 'file' in conf['local_key']: + local_key = conf['local_key']['file'] + if not local_key: + raise ConfigError(f'Invalid local-key') + + if not get_local_key(local_key): + raise ConfigError(f'File not found for local-key: {local_key}') + +def get_local_key(local_key): + for path in LOCAL_KEY_PATHS: + if os.path.exists(path + local_key): + return path + local_key + return False + +def generate(conf): + if not conf: + return + + if 'local_key' in conf and 'file' in conf['local_key']: + local_key = conf['local_key']['file'] + local_key_path = get_local_key(local_key) + call(f'sudo /usr/bin/openssl rsa -in {local_key_path} -pubout -out {LOCAL_OUTPUT}') + + if 'rsa_key_name' in conf: + for key_name, key_conf in conf['rsa_key_name'].items(): + if 'rsa_key' not in key_conf: + continue + + remote_key = key_conf['rsa_key'] + + if remote_key[:2] == "0s": # Vyatta format + remote_key = migrate_from_vyatta_key(remote_key) + else: + remote_key = bytes('-----BEGIN PUBLIC KEY-----\n' + remote_key + '\n-----END PUBLIC KEY-----\n', 'utf-8') + + with open(f'/etc/ipsec.d/certs/{key_name}.pub', 'wb') as f: + f.write(remote_key) + +def migrate_from_vyatta_key(data): + data = base64.b64decode(data[2:]) + length = struct.unpack('B', data[:1])[0] + e = int.from_bytes(data[1:1+length], 'big') + n = int.from_bytes(data[1+length:], 'big') + pubkey = construct((n, e)) + return pubkey.exportKey(format='PEM') + +def apply(conf): + if not conf: + return + + call('sudo /usr/sbin/ipsec rereadall') + call('sudo /usr/sbin/ipsec reload') + +if __name__ == '__main__': + try: + c = get_config() + verify(c) + generate(c) + apply(c) + except ConfigError as e: + print(e) + exit(1) |