diff options
Diffstat (limited to 'src/conf_mode/interfaces-openvpn.py')
| -rwxr-xr-x | src/conf_mode/interfaces-openvpn.py | 1135 |
1 files changed, 283 insertions, 852 deletions
diff --git a/src/conf_mode/interfaces-openvpn.py b/src/conf_mode/interfaces-openvpn.py index 3f4965029..7d5f7f3a0 100755 --- a/src/conf_mode/interfaces-openvpn.py +++ b/src/conf_mode/interfaces-openvpn.py @@ -17,110 +17,38 @@ import os import re -from copy import deepcopy -from sys import exit,stderr -from ipaddress import ip_address,ip_network,IPv4Address,IPv4Network,IPv6Address,IPv6Network,summarize_address_range +from sys import exit +from ipaddress import IPv4Address +from ipaddress import IPv4Network +from ipaddress import IPv6Address +from ipaddress import IPv6Network +from ipaddress import summarize_address_range from netifaces import interfaces from shutil import rmtree from vyos.config import Config -from vyos.configdict import list_diff -from vyos.configdict import is_member +from vyos.configdict import get_interface_dict +from vyos.configverify import verify_vrf +from vyos.configverify import verify_bridge_delete +from vyos.configverify import verify_diffie_hellman_length from vyos.ifconfig import VTunIf from vyos.template import render -from vyos.util import call, chown, chmod_600, chmod_755 -from vyos.validate import is_addr_assigned, is_ipv4 -from vyos import ConfigError -from vyos.util import cmd +from vyos.template import is_ipv4 +from vyos.template import is_ipv6 +from vyos.util import call +from vyos.util import chown +from vyos.util import chmod_600 +from vyos.util import dict_search +from vyos.validate import is_addr_assigned +from vyos import ConfigError from vyos import airbag airbag.enable() user = 'openvpn' group = 'openvpn' -default_config_data = { - 'address': [], - 'auth_user': '', - 'auth_pass': '', - 'auth_user_pass_file': '', - 'auth': False, - 'compress_lzo': False, - 'deleted': False, - 'description': '', - 'disable': False, - 'disable_ncp': False, - 'encryption': '', - 'hash': '', - 'intf': '', - 'ipv6_accept_ra': 1, - 'ipv6_autoconf': 0, - 'ipv6_eui64_prefix': [], - 'ipv6_eui64_prefix_remove': [], - 'ipv6_forwarding': 1, - 'ipv6_dup_addr_detect': 1, - 'ipv6_local_address': [], - 'ipv6_remote_address': [], - 'is_bridge_member': False, - 'ping_restart': '60', - 'ping_interval': '10', - 'local_address': [], - 'local_address_subnet': '', - 'local_host': '', - 'local_port': '', - 'mode': '', - 'ncp_ciphers': '', - 'options': [], - 'persistent_tunnel': False, - 'protocol': 'udp', - 'protocol_real': '', - 'redirect_gateway': '', - 'remote_address': [], - 'remote_host': [], - 'remote_port': '', - 'client': [], - 'server_domain': '', - 'server_max_conn': '', - 'server_dns_nameserver': [], - 'server_pool': True, - 'server_pool_start': '', - 'server_pool_stop': '', - 'server_pool_netmask': '', - 'server_push_route': [], - 'server_reject_unconfigured': False, - 'server_subnet': [], - 'server_topology': '', - 'server_ipv6_dns_nameserver': [], - 'server_ipv6_local': '', - 'server_ipv6_prefixlen': '', - 'server_ipv6_remote': '', - 'server_ipv6_pool': True, - 'server_ipv6_pool_base': '', - 'server_ipv6_pool_prefixlen': '', - 'server_ipv6_push_route': [], - 'server_ipv6_subnet': [], - 'shared_secret_file': '', - 'tls': False, - 'tls_auth': '', - 'tls_ca_cert': '', - 'tls_cert': '', - 'tls_crl': '', - 'tls_dh': '', - 'tls_key': '', - 'tls_crypt': '', - 'tls_role': '', - 'tls_version_min': '', - 'type': 'tun', - 'uid': user, - 'gid': group, - 'vrf': '' -} - - -def get_config_name(intf): - cfg_file = f'/run/openvpn/{intf}.conf' - return cfg_file - +cfg_file = '/run/openvpn/{ifname}.conf' def checkCertHeader(header, filename): """ @@ -137,600 +65,125 @@ def checkCertHeader(header, filename): return False -def getDefaultServer(network, topology, devtype): +def get_config(config=None): """ - Gets the default server parameters for a IPv4 "server" directive. - Logic from openvpn's src/openvpn/helper.c. - Returns a dict with addresses or False if the input parameters were incorrect. + Retrive CLI config as dictionary. Dictionary can never be empty, as at least the + interface name will be added or a deleted flag """ - if not (devtype == 'tun' or devtype == 'tap'): - return False - - if not network.version == 4: - return False - elif (devtype == 'tun' and network.prefixlen > 29) or (devtype == 'tap' and network.prefixlen > 30): - return False - - server = { - 'local': '', - 'remote_netmask': '', - 'client_remote_netmask': '', - 'pool_start': '', - 'pool_stop': '', - 'pool_netmask': '' - } - - if devtype == 'tun': - if topology == 'net30' or topology == 'point-to-point': - server['local'] = network[1] - server['remote_netmask'] = network[2] - server['client_remote_netmask'] = server['local'] - - # pool start is 4th host IP in subnet (.4 in a /24) - server['pool_start'] = network[4] - - if network.prefixlen == 29: - server['pool_stop'] = network.broadcast_address - else: - # pool end is -4 from the broadcast address (.251 in a /24) - server['pool_stop'] = network[-5] - - elif topology == 'subnet': - server['local'] = network[1] - server['remote_netmask'] = str(network.netmask) - server['client_remote_netmask'] = server['remote_netmask'] - server['pool_start'] = network[2] - server['pool_stop'] = network[-3] - server['pool_netmask'] = server['remote_netmask'] - - elif devtype == 'tap': - server['local'] = network[1] - server['remote_netmask'] = str(network.netmask) - server['client_remote_netmask'] = server['remote_netmask'] - server['pool_start'] = network[2] - server['pool_stop'] = network[-2] - server['pool_netmask'] = server['remote_netmask'] - - return server - -def get_config(config=None): - openvpn = deepcopy(default_config_data) if config: conf = config else: conf = Config() + base = ['interfaces', 'openvpn'] + openvpn = get_interface_dict(conf, base) - # determine tagNode instance - if 'VYOS_TAGNODE_VALUE' not in os.environ: - raise ConfigError('Interface (VYOS_TAGNODE_VALUE) not specified') - - openvpn['intf'] = os.environ['VYOS_TAGNODE_VALUE'] - openvpn['auth_user_pass_file'] = f"/run/openvpn/{openvpn['intf']}.pw" - - # check if interface is member of a bridge - tmp = is_member(conf, openvpn['intf'], 'bridge') - if tmp: openvpn['is_bridge_member'] = next(iter(tmp)) - - # Check if interface instance has been removed - if not conf.exists('interfaces openvpn ' + openvpn['intf']): - openvpn['deleted'] = True - return openvpn - - # bridged server should not have a pool by default (but can be specified manually) - if openvpn['is_bridge_member']: - openvpn['server_pool'] = False - openvpn['server_ipv6_pool'] = False - - # set configuration level - conf.set_level('interfaces openvpn ' + openvpn['intf']) - - # retrieve authentication options - username - if conf.exists('authentication username'): - openvpn['auth_user'] = conf.return_value('authentication username') - openvpn['auth'] = True - - # retrieve authentication options - username - if conf.exists('authentication password'): - openvpn['auth_pass'] = conf.return_value('authentication password') - openvpn['auth'] = True - - # retrieve interface description - if conf.exists('description'): - openvpn['description'] = conf.return_value('description') - - # interface device-type - if conf.exists('device-type'): - openvpn['type'] = conf.return_value('device-type') - - # disable interface - if conf.exists('disable'): - openvpn['disable'] = True - - # data encryption algorithm cipher - if conf.exists('encryption cipher'): - openvpn['encryption'] = conf.return_value('encryption cipher') - - # disable ncp-ciphers support - if conf.exists('encryption disable-ncp'): - openvpn['disable_ncp'] = True - - # data encryption algorithm ncp-list - if conf.exists('encryption ncp-ciphers'): - _ncp_ciphers = [] - for enc in conf.return_values('encryption ncp-ciphers'): - if enc == 'none': - _ncp_ciphers.append('none') - _ncp_ciphers.append('NONE') - elif enc == 'des': - _ncp_ciphers.append('des-cbc') - _ncp_ciphers.append('DES-CBC') - elif enc == '3des': - _ncp_ciphers.append('des-ede3-cbc') - _ncp_ciphers.append('DES-EDE3-CBC') - elif enc == 'aes128': - _ncp_ciphers.append('aes-128-cbc') - _ncp_ciphers.append('AES-128-CBC') - elif enc == 'aes128gcm': - _ncp_ciphers.append('aes-128-gcm') - _ncp_ciphers.append('AES-128-GCM') - elif enc == 'aes192': - _ncp_ciphers.append('aes-192-cbc') - _ncp_ciphers.append('AES-192-CBC') - elif enc == 'aes192gcm': - _ncp_ciphers.append('aes-192-gcm') - _ncp_ciphers.append('AES-192-GCM') - elif enc == 'aes256': - _ncp_ciphers.append('aes-256-cbc') - _ncp_ciphers.append('AES-256-CBC') - elif enc == 'aes256gcm': - _ncp_ciphers.append('aes-256-gcm') - _ncp_ciphers.append('AES-256-GCM') - openvpn['ncp_ciphers'] = ':'.join(_ncp_ciphers) - - # hash algorithm - if conf.exists('hash'): - openvpn['hash'] = conf.return_value('hash') - - # Maximum number of keepalive packet failures - if conf.exists('keep-alive failure-count') and conf.exists('keep-alive interval'): - fail_count = conf.return_value('keep-alive failure-count') - interval = conf.return_value('keep-alive interval') - openvpn['ping_interval' ] = interval - openvpn['ping_restart' ] = int(interval) * int(fail_count) - - # Local IP address of tunnel - even as it is a tag node - we can only work - # on the first address - if conf.exists('local-address'): - for tmp in conf.list_nodes('local-address'): - tmp_ip = ip_address(tmp) - if tmp_ip.version == 4: - openvpn['local_address'].append(tmp) - if conf.exists('local-address {} subnet-mask'.format(tmp)): - openvpn['local_address_subnet'] = conf.return_value('local-address {} subnet-mask'.format(tmp)) - elif tmp_ip.version == 6: - # input IPv6 address could be expanded so get the compressed version - openvpn['ipv6_local_address'].append(str(tmp_ip)) - - # Local IP address to accept connections - if conf.exists('local-host'): - openvpn['local_host'] = conf.return_value('local-host') - - # Local port number to accept connections - if conf.exists('local-port'): - openvpn['local_port'] = conf.return_value('local-port') - - # Enable acquisition of IPv6 address using stateless autoconfig (SLAAC) - if conf.exists('ipv6 address autoconf'): - openvpn['ipv6_autoconf'] = 1 - - # Get prefixes for IPv6 addressing based on MAC address (EUI-64) - if conf.exists('ipv6 address eui64'): - openvpn['ipv6_eui64_prefix'] = conf.return_values('ipv6 address eui64') - - # Determine currently effective EUI64 addresses - to determine which - # address is no longer valid and needs to be removed - eff_addr = conf.return_effective_values('ipv6 address eui64') - openvpn['ipv6_eui64_prefix_remove'] = list_diff(eff_addr, openvpn['ipv6_eui64_prefix']) - - # Remove the default link-local address if set. - if conf.exists('ipv6 address no-default-link-local'): - openvpn['ipv6_eui64_prefix_remove'].append('fe80::/64') - else: - # add the link-local by default to make IPv6 work - openvpn['ipv6_eui64_prefix'].append('fe80::/64') - - # Disable IPv6 forwarding on this interface - if conf.exists('ipv6 disable-forwarding'): - openvpn['ipv6_forwarding'] = 0 - - # IPv6 Duplicate Address Detection (DAD) tries - if conf.exists('ipv6 dup-addr-detect-transmits'): - openvpn['ipv6_dup_addr_detect'] = int(conf.return_value('ipv6 dup-addr-detect-transmits')) - - # to make IPv6 SLAAC and DHCPv6 work with forwarding=1, - # accept_ra must be 2 - if openvpn['ipv6_autoconf'] or 'dhcpv6' in openvpn['address']: - openvpn['ipv6_accept_ra'] = 2 - - # OpenVPN operation mode - if conf.exists('mode'): - openvpn['mode'] = conf.return_value('mode') - - # Additional OpenVPN options - if conf.exists('openvpn-option'): - openvpn['options'] = conf.return_values('openvpn-option') - - # Do not close and reopen interface - if conf.exists('persistent-tunnel'): - openvpn['persistent_tunnel'] = True - - # Communication protocol - if conf.exists('protocol'): - openvpn['protocol'] = conf.return_value('protocol') - - # IP address of remote end of tunnel - if conf.exists('remote-address'): - for tmp in conf.return_values('remote-address'): - tmp_ip = ip_address(tmp) - if tmp_ip.version == 4: - openvpn['remote_address'].append(tmp) - elif tmp_ip.version == 6: - openvpn['ipv6_remote_address'].append(str(tmp_ip)) - - # Remote host to connect to (dynamic if not set) - if conf.exists('remote-host'): - openvpn['remote_host'] = conf.return_values('remote-host') - - # Remote port number to connect to - if conf.exists('remote-port'): - openvpn['remote_port'] = conf.return_value('remote-port') - - # OpenVPN tunnel to be used as the default route - # see https://openvpn.net/community-resources/reference-manual-for-openvpn-2-4/ - # redirect-gateway flags - if conf.exists('replace-default-route'): - openvpn['redirect_gateway'] = 'def1' - - if conf.exists('replace-default-route local'): - openvpn['redirect_gateway'] = 'local def1' - - # Topology for clients - if conf.exists('server topology'): - openvpn['server_topology'] = conf.return_value('server topology') - - # Server-mode subnet (from which client IPs are allocated) - server_network_v4 = None - server_network_v6 = None - if conf.exists('server subnet'): - for tmp in conf.return_values('server subnet'): - tmp_ip = ip_network(tmp) - if tmp_ip.version == 4: - server_network_v4 = tmp_ip - # convert the network to format: "192.0.2.0 255.255.255.0" for later use in template - openvpn['server_subnet'].append(tmp_ip.with_netmask.replace(r'/', ' ')) - elif tmp_ip.version == 6: - server_network_v6 = tmp_ip - openvpn['server_ipv6_subnet'].append(str(tmp_ip)) - - # Client-specific settings - for client in conf.list_nodes('server client'): - # set configuration level - conf.set_level('interfaces openvpn ' + openvpn['intf'] + ' server client ' + client) - data = { - 'name': client, - 'disable': False, - 'ip': [], - 'ipv6_ip': [], - 'ipv6_remote': '', - 'ipv6_push_route': [], - 'ipv6_subnet': [], - 'push_route': [], - 'subnet': [], - 'remote_netmask': '' - } - - # Option to disable client connection - if conf.exists('disable'): - data['disable'] = True - - # IP address of the client - for tmp in conf.return_values('ip'): - tmp_ip = ip_address(tmp) - if tmp_ip.version == 4: - data['ip'].append(tmp) - elif tmp_ip.version == 6: - data['ipv6_ip'].append(str(tmp_ip)) - - # Route to be pushed to the client - for tmp in conf.return_values('push-route'): - tmp_ip = ip_network(tmp) - if tmp_ip.version == 4: - data['push_route'].append(tmp_ip.with_netmask.replace(r'/', ' ')) - elif tmp_ip.version == 6: - data['ipv6_push_route'].append(str(tmp_ip)) - - # Subnet belonging to the client - for tmp in conf.return_values('subnet'): - tmp_ip = ip_network(tmp) - if tmp_ip.version == 4: - data['subnet'].append(tmp_ip.with_netmask.replace(r'/', ' ')) - elif tmp_ip.version == 6: - data['ipv6_subnet'].append(str(tmp_ip)) - - # Append to global client list - openvpn['client'].append(data) - - # re-set configuration level - conf.set_level('interfaces openvpn ' + openvpn['intf']) - - # Server client IP pool - if conf.exists('server client-ip-pool'): - conf.set_level('interfaces openvpn ' + openvpn['intf'] + ' server client-ip-pool') - - # enable or disable server_pool where necessary - # default is enabled, or disabled in bridge mode - openvpn['server_pool'] = not conf.exists('disable') - - if conf.exists('start'): - openvpn['server_pool_start'] = conf.return_value('start') - - if conf.exists('stop'): - openvpn['server_pool_stop'] = conf.return_value('stop') - - if conf.exists('netmask'): - openvpn['server_pool_netmask'] = conf.return_value('netmask') - - conf.set_level('interfaces openvpn ' + openvpn['intf']) - - # Server client IPv6 pool - if conf.exists('server client-ipv6-pool'): - conf.set_level('interfaces openvpn ' + openvpn['intf'] + ' server client-ipv6-pool') - openvpn['server_ipv6_pool'] = not conf.exists('disable') - if conf.exists('base'): - tmp = conf.return_value('base').split('/') - openvpn['server_ipv6_pool_base'] = str(IPv6Address(tmp[0])) - if 1 < len(tmp): - openvpn['server_ipv6_pool_prefixlen'] = tmp[1] - - conf.set_level('interfaces openvpn ' + openvpn['intf']) - - # DNS suffix to be pushed to all clients - if conf.exists('server domain-name'): - openvpn['server_domain'] = conf.return_value('server domain-name') - - # Number of maximum client connections - if conf.exists('server max-connections'): - openvpn['server_max_conn'] = conf.return_value('server max-connections') - - # Domain Name Server (DNS) - if conf.exists('server name-server'): - for tmp in conf.return_values('server name-server'): - tmp_ip = ip_address(tmp) - if tmp_ip.version == 4: - openvpn['server_dns_nameserver'].append(tmp) - elif tmp_ip.version == 6: - openvpn['server_ipv6_dns_nameserver'].append(str(tmp_ip)) - - # Route to be pushed to all clients - if conf.exists('server push-route'): - for tmp in conf.return_values('server push-route'): - tmp_ip = ip_network(tmp) - if tmp_ip.version == 4: - openvpn['server_push_route'].append(tmp_ip.with_netmask.replace(r'/', ' ')) - elif tmp_ip.version == 6: - openvpn['server_ipv6_push_route'].append(str(tmp_ip)) - - # Reject connections from clients that are not explicitly configured - if conf.exists('server reject-unconfigured-clients'): - openvpn['server_reject_unconfigured'] = True - - # File containing TLS auth static key - if conf.exists('tls auth-file'): - openvpn['tls_auth'] = conf.return_value('tls auth-file') - openvpn['tls'] = True - - # File containing certificate for Certificate Authority (CA) - if conf.exists('tls ca-cert-file'): - openvpn['tls_ca_cert'] = conf.return_value('tls ca-cert-file') - openvpn['tls'] = True - - # File containing certificate for this host - if conf.exists('tls cert-file'): - openvpn['tls_cert'] = conf.return_value('tls cert-file') - openvpn['tls'] = True - - # File containing certificate revocation list (CRL) for this host - if conf.exists('tls crl-file'): - openvpn['tls_crl'] = conf.return_value('tls crl-file') - openvpn['tls'] = True - - # File containing Diffie Hellman parameters (server only) - if conf.exists('tls dh-file'): - openvpn['tls_dh'] = conf.return_value('tls dh-file') - openvpn['tls'] = True - - # File containing this host's private key - if conf.exists('tls key-file'): - openvpn['tls_key'] = conf.return_value('tls key-file') - openvpn['tls'] = True - - # File containing key to encrypt control channel packets - if conf.exists('tls crypt-file'): - openvpn['tls_crypt'] = conf.return_value('tls crypt-file') - openvpn['tls'] = True - - # Role in TLS negotiation - if conf.exists('tls role'): - openvpn['tls_role'] = conf.return_value('tls role') - openvpn['tls'] = True - - # Minimum required TLS version - if conf.exists('tls tls-version-min'): - openvpn['tls_version_min'] = conf.return_value('tls tls-version-min') - openvpn['tls'] = True - - if conf.exists('shared-secret-key-file'): - openvpn['shared_secret_file'] = conf.return_value('shared-secret-key-file') - - if conf.exists('use-lzo-compression'): - openvpn['compress_lzo'] = True - - # Special case when using EC certificates: - # if key-file is EC and dh-file is unset, set tls_dh to 'none' - if not openvpn['tls_dh'] and openvpn['tls_key'] and checkCertHeader('-----BEGIN EC PRIVATE KEY-----', openvpn['tls_key']): - openvpn['tls_dh'] = 'none' - - # set default server topology to net30 - if openvpn['mode'] == 'server' and not openvpn['server_topology']: - openvpn['server_topology'] = 'net30' - - # Convert protocol to real protocol used by openvpn. - # To make openvpn listen on both IPv4 and IPv6 we must use *6 protocols - # (https://community.openvpn.net/openvpn/ticket/360), unless the local-host - # or each of the remote-host in client mode is IPv4 - # in which case it must use the standard protocols. - if openvpn['protocol'] == 'tcp-active': - openvpn['protocol_real'] = 'tcp6-client' - elif openvpn['protocol'] == 'tcp-passive': - openvpn['protocol_real'] = 'tcp6-server' - else: - openvpn['protocol_real'] = 'udp6' - - if ( is_ipv4(openvpn['local_host']) or - # in client mode test all the remotes instead - (openvpn['mode'] == 'client' and all([is_ipv4(h) for h in openvpn['remote_host']])) ): - # takes out the '6' - openvpn['protocol_real'] = openvpn['protocol_real'][:3] + openvpn['protocol_real'][4:] - - # Set defaults where necessary. - # If any of the input parameters are wrong, - # this will return False and no defaults will be set. - if server_network_v4 and openvpn['server_topology'] and openvpn['type']: - default_server = None - default_server = getDefaultServer(server_network_v4, openvpn['server_topology'], openvpn['type']) - if default_server: - # server-bridge doesn't require a pool so don't set defaults for it - if openvpn['server_pool'] and not openvpn['is_bridge_member']: - if not openvpn['server_pool_start']: - openvpn['server_pool_start'] = default_server['pool_start'] - - if not openvpn['server_pool_stop']: - openvpn['server_pool_stop'] = default_server['pool_stop'] - - if not openvpn['server_pool_netmask']: - openvpn['server_pool_netmask'] = default_server['pool_netmask'] - - for client in openvpn['client']: - client['remote_netmask'] = default_server['client_remote_netmask'] - - if server_network_v6: - if not openvpn['server_ipv6_local']: - openvpn['server_ipv6_local'] = server_network_v6[1] - if not openvpn['server_ipv6_prefixlen']: - openvpn['server_ipv6_prefixlen'] = server_network_v6.prefixlen - if not openvpn['server_ipv6_remote']: - openvpn['server_ipv6_remote'] = server_network_v6[2] - - if openvpn['server_ipv6_pool'] and server_network_v6.prefixlen < 112: - if not openvpn['server_ipv6_pool_base']: - openvpn['server_ipv6_pool_base'] = server_network_v6[0x1000] - if not openvpn['server_ipv6_pool_prefixlen']: - openvpn['server_ipv6_pool_prefixlen'] = openvpn['server_ipv6_prefixlen'] - - for client in openvpn['client']: - client['ipv6_remote'] = openvpn['server_ipv6_local'] - - if openvpn['redirect_gateway']: - openvpn['redirect_gateway'] += ' ipv6' - - # retrieve VRF instance - if conf.exists('vrf'): - openvpn['vrf'] = conf.return_value('vrf') + openvpn['auth_user_pass_file'] = '/run/openvpn/{ifname}.pw'.format(**openvpn) + openvpn['daemon_user'] = user + openvpn['daemon_group'] = group return openvpn def verify(openvpn): - if openvpn['deleted']: - if openvpn['is_bridge_member']: - raise ConfigError(( - f'Cannot delete interface "{openvpn["intf"]}" as it is a ' - f'member of bridge "{openvpn["is_bridge_menber"]}"!')) + if 'deleted' in openvpn: + verify_bridge_delete(openvpn) return None - - if not openvpn['mode']: - raise ConfigError('Must specify OpenVPN operation mode') + if 'mode' not in openvpn: + raise ConfigError('Must specify OpenVPN operation mode!') # Check if we have disabled ncp and at the same time specified ncp-ciphers - if openvpn['disable_ncp'] and openvpn['ncp_ciphers']: - raise ConfigError('Cannot specify both "encryption disable-ncp" and "encryption ncp-ciphers"') + if 'encryption' in openvpn: + if {'disable_ncp', 'ncp_ciphers'} <= set(openvpn.get('encryption')): + raise ConfigError('Can not specify both "encryption disable-ncp" '\ + 'and "encryption ncp-ciphers"') + # # OpenVPN client mode - VERIFY # if openvpn['mode'] == 'client': - if openvpn['local_port']: + if 'local_port' in openvpn: raise ConfigError('Cannot specify "local-port" in client mode') - if openvpn['local_host']: + if 'local_host' in openvpn: raise ConfigError('Cannot specify "local-host" in client mode') + if 'remote_host' not in openvpn: + raise ConfigError('Must specify "remote-host" in client mode') + if openvpn['protocol'] == 'tcp-passive': raise ConfigError('Protocol "tcp-passive" is not valid in client mode') - if not openvpn['remote_host']: - raise ConfigError('Must specify "remote-host" in client mode') - - if openvpn['tls_dh'] and openvpn['tls_dh'] != 'none': + if dict_search('tls.dh_file', openvpn): raise ConfigError('Cannot specify "tls dh-file" in client mode') # # OpenVPN site-to-site - VERIFY # - if openvpn['mode'] == 'site-to-site': - if openvpn['ncp_ciphers']: - raise ConfigError('encryption ncp-ciphers cannot be specified in site-to-site mode, only server or client') - - if openvpn['mode'] == 'site-to-site' and not openvpn['is_bridge_member']: - if not (openvpn['local_address'] or openvpn['ipv6_local_address']): + elif openvpn['mode'] == 'site-to-site': + if not 'local_address' in openvpn: raise ConfigError('Must specify "local-address" or add interface to bridge') - if len(openvpn['local_address']) > 1 or len(openvpn['ipv6_local_address']) > 1: - raise ConfigError('Cannot specify more than 1 IPv4 and 1 IPv6 "local-address"') + if len([addr for addr in openvpn['local_address'] if is_ipv4(addr)]) > 1: + raise ConfigError('Only one IPv4 local-address can be specified') - if len(openvpn['remote_address']) > 1 or len(openvpn['ipv6_remote_address']) > 1: - raise ConfigError('Cannot specify more than 1 IPv4 and 1 IPv6 "remote-address"') + if len([addr for addr in openvpn['local_address'] if is_ipv6(addr)]) > 1: + raise ConfigError('Only one IPv6 local-address can be specified') - for host in openvpn['remote_host']: - if host in openvpn['remote_address'] or host in openvpn['ipv6_remote_address']: - raise ConfigError('"remote-address" cannot be the same as "remote-host"') + if openvpn['device_type'] == 'tun': + if 'remote_address' not in openvpn: + raise ConfigError('Must specify "remote-address"') - if openvpn['local_address'] and not (openvpn['remote_address'] or openvpn['local_address_subnet']): - raise ConfigError('IPv4 "local-address" requires IPv4 "remote-address" or IPv4 "local-address subnet"') + if 'remote_address' in openvpn: + if len([addr for addr in openvpn['remote_address'] if is_ipv4(addr)]) > 1: + raise ConfigError('Only one IPv4 remote-address can be specified') - if openvpn['remote_address'] and not openvpn['local_address']: - raise ConfigError('IPv4 "remote-address" requires IPv4 "local-address"') + if len([addr for addr in openvpn['remote_address'] if is_ipv6(addr)]) > 1: + raise ConfigError('Only one IPv6 remote-address can be specified') - if openvpn['ipv6_local_address'] and not openvpn['ipv6_remote_address']: - raise ConfigError('IPv6 "local-address" requires IPv6 "remote-address"') + if not 'local_address' in openvpn: + raise ConfigError('"remote-address" requires "local-address"') - if openvpn['ipv6_remote_address'] and not openvpn['ipv6_local_address']: - raise ConfigError('IPv6 "remote-address" requires IPv6 "local-address"') + v4loAddr = [addr for addr in openvpn['local_address'] if is_ipv4(addr)] + v4remAddr = [addr for addr in openvpn['remote_address'] if is_ipv4(addr)] + if v4loAddr and not v4remAddr: + raise ConfigError('IPv4 "local-address" requires IPv4 "remote-address"') + elif v4remAddr and not v4loAddr: + raise ConfigError('IPv4 "remote-address" requires IPv4 "local-address"') - if openvpn['type'] == 'tun': - if not (openvpn['remote_address'] or openvpn['ipv6_remote_address']): - raise ConfigError('Must specify "remote-address"') + v6remAddr = [addr for addr in openvpn['remote_address'] if is_ipv6(addr)] + v6loAddr = [addr for addr in openvpn['local_address'] if is_ipv6(addr)] + if v6loAddr and not v6remAddr: + raise ConfigError('IPv6 "local-address" requires IPv6 "remote-address"') + elif v6remAddr and not v6loAddr: + raise ConfigError('IPv6 "remote-address" requires IPv6 "local-address"') - if ( (openvpn['local_address'] and openvpn['local_address'] == openvpn['remote_address']) or - (openvpn['ipv6_local_address'] and openvpn['ipv6_local_address'] == openvpn['ipv6_remote_address']) ): + if (v4loAddr == v4remAddr) or (v6remAddr == v4remAddr): raise ConfigError('"local-address" and "remote-address" cannot be the same') - if openvpn['local_host'] in openvpn['local_address'] or openvpn['local_host'] in openvpn['ipv6_local_address']: + if dict_search('local_host', openvpn) in dict_search('local_address', openvpn): raise ConfigError('"local-address" cannot be the same as "local-host"') + if dict_search('remote_host', openvpn) in dict_search('remote_address', openvpn): + raise ConfigError('"remote-address" and "remote-host" can not be the same') + + + if 'local_address' in openvpn: + # we can only have one local_address, this is ensured above + v4addr = None + for laddr in openvpn['local_address']: + if is_ipv4(laddr): v4addr = laddr + + if 'remote_address' not in openvpn and (v4addr not in openvpn['local_address'] or 'subnet_mask' not in openvpn['local_address'][v4addr]): + raise ConfigError('IPv4 "local-address" requires IPv4 "remote-address" or IPv4 "local-address subnet"') + + if dict_search('encryption.ncp_ciphers', openvpn): + raise ConfigError('NCP ciphers can only be used in client or server mode') + else: # checks for client-server or site-to-site bridged - if openvpn['local_address'] or openvpn['ipv6_local_address'] or openvpn['remote_address'] or openvpn['ipv6_remote_address']: - raise ConfigError('Cannot specify "local-address" or "remote-address" in client-server or bridge mode') + if 'local_address' in openvpn or 'remote_address' in openvpn: + raise ConfigError('Cannot specify "local-address" or "remote-address" ' \ + 'in client/server or bridge mode') # # OpenVPN server mode - VERIFY @@ -739,47 +192,57 @@ def verify(openvpn): if openvpn['protocol'] == 'tcp-active': raise ConfigError('Protocol "tcp-active" is not valid in server mode') - if openvpn['remote_port']: + if 'remote_port' in openvpn: raise ConfigError('Cannot specify "remote-port" in server mode') - if openvpn['remote_host']: + if 'remote_host' in openvpn: raise ConfigError('Cannot specify "remote-host" in server mode') - if openvpn['protocol'] == 'tcp-passive' and len(openvpn['remote_host']) > 1: - raise ConfigError('Cannot specify more than 1 "remote-host" with "tcp-passive"') - - if not openvpn['tls_dh'] and not checkCertHeader('-----BEGIN EC PRIVATE KEY-----', openvpn['tls_key']): - raise ConfigError('Must specify "tls dh-file" when not using EC keys in server mode') - - if len(openvpn['server_subnet']) > 1 or len(openvpn['server_ipv6_subnet']) > 1: - raise ConfigError('Cannot specify more than 1 IPv4 and 1 IPv6 server subnet') - - for client in openvpn['client']: - if len(client['ip']) > 1 or len(client['ipv6_ip']) > 1: - raise ConfigError(f'Server client "{client["name"]}": cannot specify more than 1 IPv4 and 1 IPv6 IP') + if 'tls' in openvpn: + if 'dh_file' not in openvpn['tls']: + if 'key_file' in openvpn['tls'] and not checkCertHeader('-----BEGIN EC PRIVATE KEY-----', openvpn['tls']['key_file']): + raise ConfigError('Must specify "tls dh-file" when not using EC keys in server mode') + + tmp = dict_search('server.subnet', openvpn) + if tmp: + v4_subnets = len([subnet for subnet in tmp if is_ipv4(subnet)]) + v6_subnets = len([subnet for subnet in tmp if is_ipv6(subnet)]) + if v4_subnets > 1: + raise ConfigError('Cannot specify more than 1 IPv4 server subnet') + if v6_subnets > 1: + raise ConfigError('Cannot specify more than 1 IPv6 server subnet') + + if v6_subnets > 0 and v4_subnets == 0: + raise ConfigError('IPv6 server requires an IPv4 server subnet') - if openvpn['server_subnet']: - subnet = IPv4Network(openvpn['server_subnet'][0].replace(' ', '/')) + for subnet in tmp: + if is_ipv4(subnet): + subnet = IPv4Network(subnet) - if openvpn['type'] == 'tun' and subnet.prefixlen > 29: - raise ConfigError('Server subnets smaller than /29 with device type "tun" are not supported') - elif openvpn['type'] == 'tap' and subnet.prefixlen > 30: - raise ConfigError('Server subnets smaller than /30 with device type "tap" are not supported') + if openvpn['device_type'] == 'tun' and subnet.prefixlen > 29: + raise ConfigError('Server subnets smaller than /29 with device type "tun" are not supported') + elif openvpn['device_type'] == 'tap' and subnet.prefixlen > 30: + raise ConfigError('Server subnets smaller than /30 with device type "tap" are not supported') - for client in openvpn['client']: - if client['ip'] and not IPv4Address(client['ip'][0]) in subnet: - raise ConfigError(f'Client "{client["name"]}" IP {client["ip"][0]} not in server subnet {subnet}') + for client in (dict_search('client', openvpn) or []): + if client['ip'] and not IPv4Address(client['ip'][0]) in subnet: + raise ConfigError(f'Client "{client["name"]}" IP {client["ip"][0]} not in server subnet {subnet}') else: - if not openvpn['is_bridge_member']: + if 'is_bridge_member' not in openvpn: raise ConfigError('Must specify "server subnet" or add interface to bridge in server mode') - if openvpn['server_pool']: - if not (openvpn['server_pool_start'] and openvpn['server_pool_stop']): - raise ConfigError('Server client-ip-pool requires both start and stop addresses in bridged mode') + + for client in (dict_search('client', openvpn) or []): + if len(client['ip']) > 1 or len(client['ipv6_ip']) > 1: + raise ConfigError(f'Server client "{client["name"]}": cannot specify more than 1 IPv4 and 1 IPv6 IP') + + if dict_search('server.client_ip_pool', openvpn): + if not (dict_search('server.client_ip_pool.start', openvpn) and dict_search('server.client_ip_pool.stop', openvpn)): + raise ConfigError('Server client-ip-pool requires both start and stop addresses') else: - v4PoolStart = IPv4Address(openvpn['server_pool_start']) - v4PoolStop = IPv4Address(openvpn['server_pool_stop']) + v4PoolStart = IPv4Address(dict_search('server.client_ip_pool.start', openvpn)) + v4PoolStop = IPv4Address(dict_search('server.client_ip_pool.stop', openvpn)) if v4PoolStart > v4PoolStop: raise ConfigError(f'Server client-ip-pool start address {v4PoolStart} is larger than stop address {v4PoolStop}') @@ -788,59 +251,57 @@ def verify(openvpn): raise ConfigError(f'Server client-ip-pool is too large [{v4PoolStart} -> {v4PoolStop} = {v4PoolSize}], maximum is 65536 addresses.') v4PoolNets = list(summarize_address_range(v4PoolStart, v4PoolStop)) - for client in openvpn['client']: + for client in (dict_search('client', openvpn) or []): if client['ip']: for v4PoolNet in v4PoolNets: if IPv4Address(client['ip'][0]) in v4PoolNet: - print(f'Warning: Client "{client["name"]}" IP {client["ip"][0]} is in server IP pool, it is not reserved for this client.', - file=stderr) - - if openvpn['server_ipv6_subnet']: - if not openvpn['server_subnet']: - raise ConfigError('IPv6 server requires an IPv4 server subnet') - - if openvpn['server_ipv6_pool']: - if not openvpn['server_pool']: - raise ConfigError('IPv6 server pool requires an IPv4 server pool') - - if int(openvpn['server_ipv6_pool_prefixlen']) >= 112: - raise ConfigError('IPv6 server pool must be larger than /112') - - v6PoolStart = IPv6Address(openvpn['server_ipv6_pool_base']) - v6PoolStop = IPv6Network((v6PoolStart, openvpn['server_ipv6_pool_prefixlen']), strict=False)[-1] # don't remove the parentheses, it's a 2-tuple - v6PoolSize = int(v6PoolStop) - int(v6PoolStart) if int(openvpn['server_ipv6_pool_prefixlen']) > 96 else 65536 - if v6PoolSize < v4PoolSize: - raise ConfigError(f'IPv6 server pool must be at least as large as the IPv4 pool (current sizes: IPv6={v6PoolSize} IPv4={v4PoolSize})') + print(f'Warning: Client "{client["name"]}" IP {client["ip"][0]} is in server IP pool, it is not reserved for this client.') + + for subnet in (dict_search('server.subnet', openvpn) or []): + if is_ipv6(subnet): + tmp = dict_search('client_ipv6_pool.base', openvpn) + if tmp: + if not dict_search('server.client_ip_pool', openvpn): + raise ConfigError('IPv6 server pool requires an IPv4 server pool') + + if int(tmp.split('/')[1]) >= 112: + raise ConfigError('IPv6 server pool must be larger than /112') + + # + # todo - weird logic + # + v6PoolStart = IPv6Address(tmp) + v6PoolStop = IPv6Network((v6PoolStart, openvpn['server_ipv6_pool_prefixlen']), strict=False)[-1] # don't remove the parentheses, it's a 2-tuple + v6PoolSize = int(v6PoolStop) - int(v6PoolStart) if int(openvpn['server_ipv6_pool_prefixlen']) > 96 else 65536 + if v6PoolSize < v4PoolSize: + raise ConfigError(f'IPv6 server pool must be at least as large as the IPv4 pool (current sizes: IPv6={v6PoolSize} IPv4={v4PoolSize})') + + v6PoolNets = list(summarize_address_range(v6PoolStart, v6PoolStop)) + for client in (dict_search('client', openvpn) or []): + if client['ipv6_ip']: + for v6PoolNet in v6PoolNets: + if IPv6Address(client['ipv6_ip'][0]) in v6PoolNet: + print(f'Warning: Client "{client["name"]}" IP {client["ipv6_ip"][0]} is in server IP pool, it is not reserved for this client.') - v6PoolNets = list(summarize_address_range(v6PoolStart, v6PoolStop)) - for client in openvpn['client']: - if client['ipv6_ip']: - for v6PoolNet in v6PoolNets: - if IPv6Address(client['ipv6_ip'][0]) in v6PoolNet: - print(f'Warning: Client "{client["name"]}" IP {client["ipv6_ip"][0]} is in server IP pool, it is not reserved for this client.', - file=stderr) - - else: - if openvpn['server_ipv6_push_route']: - raise ConfigError('IPv6 push-route requires an IPv6 server subnet') - - for client in openvpn ['client']: - if client['ipv6_ip']: - raise ConfigError(f'Server client "{client["name"]}" IPv6 IP requires an IPv6 server subnet') - if client['ipv6_push_route']: - raise ConfigError(f'Server client "{client["name"]} IPv6 push-route requires an IPv6 server subnet"') - if client['ipv6_subnet']: - raise ConfigError(f'Server client "{client["name"]} IPv6 subnet requires an IPv6 server subnet"') + else: + for route in (dict_search('server.push_route', openvpn) or []): + if is_ipv6(route): + raise ConfigError('IPv6 push-route requires an IPv6 server subnet') + + #for client in openvpn ['client']: + # if client['ipv6_ip']: + # raise ConfigError(f'Server client "{client["name"]}" IPv6 IP requires an IPv6 server subnet') + # if client['ipv6_push_route']: + # raise ConfigError(f'Server client "{client["name"]} IPv6 push-route requires an IPv6 server subnet"') + # if client['ipv6_subnet']: + # raise ConfigError(f'Server client "{client["name"]} IPv6 subnet requires an IPv6 server subnet"') else: # checks for both client and site-to-site go here - if openvpn['server_reject_unconfigured']: - raise ConfigError('reject-unconfigured-clients is only supported in OpenVPN server mode') + if dict_search('server.reject_unconfigured_clients', openvpn): + raise ConfigError('Option reject-unconfigured-clients only supported in server mode') - if openvpn['server_topology']: - raise ConfigError('The "topology" option is only valid in server mode') - - if (not openvpn['remote_host']) and openvpn['redirect_gateway']: + if 'replace_default_route' in openvpn and 'remote_host' not in openvpn: raise ConfigError('Cannot set "replace-default-route" without "remote-host"') # @@ -849,133 +310,135 @@ def verify(openvpn): # # verify specified IP address is present on any interface on this system - if openvpn['local_host']: + if 'local_host' in openvpn: if not is_addr_assigned(openvpn['local_host']): - raise ConfigError('No interface on system with specified local-host IP address: {}'.format(openvpn['local_host'])) + raise ConfigError('local-host IP address "{local_host}" not assigned' \ + ' to any interface'.format(**openvpn)) # TCP active if openvpn['protocol'] == 'tcp-active': - if openvpn['local_port']: + if 'local_port' in openvpn: raise ConfigError('Cannot specify "local-port" with "tcp-active"') - if not openvpn['remote_host']: + if 'remote_host' in openvpn: raise ConfigError('Must specify "remote-host" with "tcp-active"') # shared secret and TLS - if not (openvpn['shared_secret_file'] or openvpn['tls']): + if not ('shared_secret_key_file' in openvpn or 'tls' in openvpn): raise ConfigError('Must specify one of "shared-secret-key-file" and "tls"') - if openvpn['shared_secret_file'] and openvpn['tls']: + if {'shared_secret_key_file', 'tls'} <= set(openvpn): raise ConfigError('Can only specify one of "shared-secret-key-file" and "tls"') if openvpn['mode'] in ['client', 'server']: - if not openvpn['tls']: - raise ConfigError('Must specify "tls" in client-server mode') + if 'tls' not in openvpn: + raise ConfigError('Must specify "tls" for server and client mode') # # TLS/encryption # - if openvpn['shared_secret_file']: - if openvpn['encryption'] in ['aes128gcm', 'aes192gcm', 'aes256gcm']: - raise ConfigError('GCM encryption with shared-secret-key-file is not supported') + if 'shared_secret_key_file' in openvpn: + if dict_search('encryption.cipher', openvpn) in ['aes128gcm', 'aes192gcm', 'aes256gcm']: + raise ConfigError('GCM encryption with shared-secret-key-file not supported') - if not checkCertHeader('-----BEGIN OpenVPN Static key V1-----', openvpn['shared_secret_file']): - raise ConfigError('Specified shared-secret-key-file "{}" is not valid'.format(openvpn['shared_secret_file'])) + file = dict_search('shared_secret_key_file', openvpn) + if file and not checkCertHeader('-----BEGIN OpenVPN Static key V1-----', file): + raise ConfigError(f'Specified shared-secret-key-file "{file}" is not valid') - if openvpn['tls']: - if not openvpn['tls_ca_cert']: + if 'tls' in openvpn: + if 'ca_cert_file' not in openvpn['tls']: raise ConfigError('Must specify "tls ca-cert-file"') - if not (openvpn['mode'] == 'client' and openvpn['auth']): - if not openvpn['tls_cert']: - raise ConfigError('Must specify "tls cert-file"') + if not (openvpn['mode'] == 'client' and 'auth_file' in openvpn['tls']): + if 'cert_file' not in openvpn['tls']: + raise ConfigError('Missing "tls cert-file"') - if not openvpn['tls_key']: - raise ConfigError('Must specify "tls key-file"') + if 'key_file' not in openvpn['tls']: + raise ConfigError('Missing "tls key-file"') - if openvpn['tls_auth'] and openvpn['tls_crypt']: + if {'auth_file', 'crypt_file'} <= set(openvpn['tls']): raise ConfigError('TLS auth and crypt are mutually exclusive') - if not checkCertHeader('-----BEGIN CERTIFICATE-----', openvpn['tls_ca_cert']): - raise ConfigError('Specified ca-cert-file "{}" is invalid'.format(openvpn['tls_ca_cert'])) + file = dict_search('tls.ca_cert_file', openvpn) + if file and not checkCertHeader('-----BEGIN CERTIFICATE-----', file): + raise ConfigError(f'Specified ca-cert-file "{file}" is invalid') + + file = dict_search('tls.auth_file', openvpn) + if file and not checkCertHeader('-----BEGIN OpenVPN Static key V1-----', file): + raise ConfigError(f'Specified auth-file "{file}" is invalid') - if openvpn['tls_auth']: - if not checkCertHeader('-----BEGIN OpenVPN Static key V1-----', openvpn['tls_auth']): - raise ConfigError('Specified auth-file "{}" is invalid'.format(openvpn['tls_auth'])) + file = dict_search('tls.cert_file', openvpn) + if file and not checkCertHeader('-----BEGIN CERTIFICATE-----', file): + raise ConfigError(f'Specified cert-file "{file}" is invalid') - if openvpn['tls_cert']: - if not checkCertHeader('-----BEGIN CERTIFICATE-----', openvpn['tls_cert']): - raise ConfigError('Specified cert-file "{}" is invalid'.format(openvpn['tls_cert'])) + file = dict_search('tls.key_file', openvpn) + if file and not checkCertHeader('-----BEGIN (?:RSA |EC )?PRIVATE KEY-----', file): + raise ConfigError(f'Specified key-file "{file}" is not valid') - if openvpn['tls_key']: - if not checkCertHeader('-----BEGIN (?:RSA |EC )?PRIVATE KEY-----', openvpn['tls_key']): - raise ConfigError('Specified key-file "{}" is not valid'.format(openvpn['tls_key'])) + file = dict_search('tls.crypt_file', openvpn) + if file and not checkCertHeader('-----BEGIN OpenVPN Static key V1-----', file): + raise ConfigError(f'Specified TLS crypt-file "{file}" is invalid') - if openvpn['tls_crypt']: - if not checkCertHeader('-----BEGIN OpenVPN Static key V1-----', openvpn['tls_crypt']): - raise ConfigError('Specified TLS crypt-file "{}" is invalid'.format(openvpn['tls_crypt'])) + file = dict_search('tls.crl_file', openvpn) + if file and not checkCertHeader('-----BEGIN X509 CRL-----', file): + raise ConfigError(f'Specified crl-file "{file} not valid') - if openvpn['tls_crl']: - if not checkCertHeader('-----BEGIN X509 CRL-----', openvpn['tls_crl']): - raise ConfigError('Specified crl-file "{} not valid'.format(openvpn['tls_crl'])) + file = dict_search('tls.dh_file', openvpn) + if file and not checkCertHeader('-----BEGIN DH PARAMETERS-----', file): + raise ConfigError(f'Specified dh-file "{file}" is not valid') - if openvpn['tls_dh'] and openvpn['tls_dh'] != 'none': - if not checkCertHeader('-----BEGIN DH PARAMETERS-----', openvpn['tls_dh']): - raise ConfigError('Specified dh-file "{}" is not valid'.format(openvpn['tls_dh'])) + if file and not verify_diffie_hellman_length(file, 2048): + raise ConfigError(f'Minimum DH key-size is 2048 bits') - if openvpn['tls_role']: + tmp = dict_search('tls.role', openvpn) + if tmp: if openvpn['mode'] in ['client', 'server']: - if not openvpn['tls_auth']: + if not dict_search('tls.auth_file', openvpn): raise ConfigError('Cannot specify "tls role" in client-server mode') - if openvpn['tls_role'] == 'active': + if tmp == 'active': if openvpn['protocol'] == 'tcp-passive': raise ConfigError('Cannot specify "tcp-passive" when "tls role" is "active"') - if openvpn['tls_dh'] and openvpn['tls_dh'] != 'none': + if dict_search('tls.dh_file', openvpn): raise ConfigError('Cannot specify "tls dh-file" when "tls role" is "active"') - elif openvpn['tls_role'] == 'passive': + elif tmp == 'passive': if openvpn['protocol'] == 'tcp-active': raise ConfigError('Cannot specify "tcp-active" when "tls role" is "passive"') - if not openvpn['tls_dh']: + if not dict_search('tls.dh_file', openvpn): raise ConfigError('Must specify "tls dh-file" when "tls role" is "passive"') - if openvpn['tls_key'] and checkCertHeader('-----BEGIN EC PRIVATE KEY-----', openvpn['tls_key']): - if openvpn['tls_dh'] and openvpn['tls_dh'] != 'none': - print('Warning: using dh-file and EC keys simultaneously will lead to DH ciphers being used instead of ECDH') - else: - print('Diffie-Hellman prime file is unspecified, assuming ECDH') + file = dict_search('tls.key_file', openvpn) + if file and checkCertHeader('-----BEGIN EC PRIVATE KEY-----', file): + if dict_search('tls.dh_file', openvpn): + print('Warning: using dh-file and EC keys simultaneously will ' \ + 'lead to DH ciphers being used instead of ECDH') - if openvpn['encryption'] == 'none': - print('Warning: "encryption none" was specified. NO encryption will be performed and tunnelled data WILL be transmitted in clear text over the network!') + if dict_search('encryption.cipher', openvpn) == 'none': + print('Warning: "encryption none" was specified!') + print('No encryption will be performed and data is transmitted in ' \ + 'plain text over the network!') # # Auth user/pass # - if openvpn['auth']: - if not openvpn['auth_user']: - raise ConfigError('Username for authentication is missing') - - if not openvpn['auth_pass']: + if (dict_search('authentication.username', openvpn) and not + dict_search('authentication.password', openvpn)): raise ConfigError('Password for authentication is missing') - if openvpn['vrf']: - if openvpn['vrf'] not in interfaces(): - raise ConfigError(f'VRF "{openvpn["vrf"]}" does not exist') + if (dict_search('authentication.password', openvpn) and not + dict_search('authentication.username', openvpn)): + raise ConfigError('Username for authentication is missing') - if openvpn['is_bridge_member']: - raise ConfigError(( - f'Interface "{openvpn["intf"]}" cannot be member of VRF ' - f'"{openvpn["vrf"]}" and bridge "{openvpn["is_bridge_member"]}" ' - f'at the same time!')) + verify_vrf(openvpn) return None def generate(openvpn): - interface = openvpn['intf'] - directory = os.path.dirname(get_config_name(interface)) + interface = openvpn['ifname'] + directory = os.path.dirname(cfg_file.format(**openvpn)) # we can't know in advance which clients have been removed, # thus all client configs will be removed and re-added on demand @@ -983,25 +446,25 @@ def generate(openvpn): if os.path.isdir(ccd_dir): rmtree(ccd_dir, ignore_errors=True) - if openvpn['deleted'] or openvpn['disable']: + if 'deleted' in openvpn or 'disable' in openvpn: return None - # create config directory on demand - directories = [] - directories.append(f'{directory}/status') - directories.append(f'{directory}/ccd/{interface}') - for onedir in directories: - if not os.path.exists(onedir): - os.makedirs(onedir, 0o755) - chown(onedir, user, group) + # create client config directory on demand + if not os.path.exists(ccd_dir): + os.makedirs(ccd_dir, 0o755) + chown(ccd_dir, user, group) # Fix file permissons for keys fix_permissions = [] - fix_permissions.append(openvpn['shared_secret_file']) - fix_permissions.append(openvpn['tls_key']) + + tmp = dict_search('shared_secret_key_file', openvpn) + if tmp: fix_permissions.append(openvpn['shared_secret_key_file']) + + tmp = dict_search('tls.key_file', openvpn) + if tmp: fix_permissions.append(tmp) # Generate User/Password authentication file - if openvpn['auth']: + if 'auth' in openvpn: with open(openvpn['auth_user_pass_file'], 'w') as f: f.write('{}\n{}'.format(openvpn['auth_user'], openvpn['auth_pass'])) # also change permission on auth file @@ -1013,16 +476,24 @@ def generate(openvpn): os.remove(openvpn['auth_user_pass_file']) # Generate client specific configuration - for client in openvpn['client']: - client_file = os.path.join(ccd_dir, client['name']) - render(client_file, 'openvpn/client.conf.tmpl', client) - chown(client_file, user, group) + if dict_search('server.client', openvpn): + for client, client_config in dict_search('server.client', openvpn).items(): + client_file = os.path.join(ccd_dir, client) + + # Our client need's to know its subnet mask ... + client_config['server_subnet'] = dict_search('server.subnet', openvpn) + + import pprint + pprint.pprint(client_config) + + render(client_file, 'openvpn/client.conf.tmpl', client_config, + trim_blocks=True, user=user, group=group) # we need to support quoting of raw parameters from OpenVPN CLI # see https://phabricator.vyos.net/T1632 - render(get_config_name(interface), 'openvpn/server.conf.tmpl', openvpn, - formater=lambda _: _.replace(""", '"')) - chown(get_config_name(interface), user, group) + render(cfg_file.format(**openvpn), 'openvpn/server.conf.tmpl', openvpn, + trim_blocks=True, formater=lambda _: _.replace(""", '"'), + user=user, group=group) # Fixup file permissions for file in fix_permissions: @@ -1031,75 +502,34 @@ def generate(openvpn): return None def apply(openvpn): - interface = openvpn['intf'] + interface = openvpn['ifname'] call(f'systemctl stop openvpn@{interface}.service') - # On configuration change we need to wait for the 'old' interface to - # vanish from the Kernel, if it is not gone, OpenVPN will report: - # ERROR: Cannot ioctl TUNSETIFF vtun10: Device or resource busy (errno=16) - if interface in interfaces(): - cmd(f'sudo ip link del {interface}') - # Do some cleanup when OpenVPN is disabled/deleted - if openvpn['deleted'] or openvpn['disable']: + if 'deleted' in openvpn or 'disable' in openvpn: # cleanup old configuration files cleanup = [] - cleanup.append(get_config_name(interface)) + cleanup.append(cfg_file.format(**openvpn)) cleanup.append(openvpn['auth_user_pass_file']) for file in cleanup: if os.path.isfile(file): os.unlink(file) + if interface in interfaces(): + VTunIf(interface).remove() + return None # No matching OpenVPN process running - maybe it got killed or none # existed - nevertheless, spawn new OpenVPN process call(f'systemctl start openvpn@{interface}.service') - if interface not in interfaces(): - try: - dev_type = openvpn['type'] - cmd(f'sudo openvpn --mktun --dev-type {dev_type} --dev {interface}') - except: - pass - - # we need to catch the exception if the interface is not up due to - # reason stated above - o = VTunIf(interface) - # update interface description used e.g. within SNMP - o.set_alias(openvpn['description']) - # IPv6 accept RA - o.set_ipv6_accept_ra(openvpn['ipv6_accept_ra']) - # IPv6 address autoconfiguration - o.set_ipv6_autoconf(openvpn['ipv6_autoconf']) - # IPv6 forwarding - o.set_ipv6_forwarding(openvpn['ipv6_forwarding']) - # IPv6 Duplicate Address Detection (DAD) tries - o.set_ipv6_dad_messages(openvpn['ipv6_dup_addr_detect']) - - # IPv6 EUI-based addresses - only in TAP mode (TUN's have no MAC) - # If MAC has changed, old EUI64 addresses won't get deleted, - # but this isn't easy to solve, so leave them. - # This is even more difficult as openvpn uses a random MAC for the - # initial interface creation, unless set by 'lladdr'. - # NOTE: right now the interface is always deleted. For future - # compatibility when tap's are not deleted, leave the del_ in - if openvpn['mode'] == 'tap': - for addr in openvpn['ipv6_eui64_prefix_remove']: - o.del_ipv6_eui64_address(addr) - for addr in openvpn['ipv6_eui64_prefix']: - o.add_ipv6_eui64_address(addr) - - # assign/remove VRF (ONLY when not a member of a bridge, - # otherwise 'nomaster' removes it from it) - if not openvpn['is_bridge_member']: - o.set_vrf(openvpn['vrf']) - - # TAP interface needs to be brought up explicitly - if openvpn['type'] == 'tap': - if not openvpn['disable']: - VTunIf(interface).set_admin_state('up') + conf = VTunIf.get_config() + conf['device_type'] = openvpn['device_type'] + + o = VTunIf(interface, **conf) + o.update(openvpn) return None @@ -1113,3 +543,4 @@ if __name__ == '__main__': except ConfigError as e: print(e) exit(1) + |