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#!/usr/bin/env python3
#
# Copyright (C) 2020 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 os
import unittest

from vyos.configsession import ConfigSession, ConfigSessionError
from base_interfaces_test import BasicInterfaceTest

# Generate WireGuard default keypair
if not os.path.isdir('/config/auth/wireguard/default'):
    os.system('/usr/libexec/vyos/op_mode/wireguard.py --genkey')

base_path = ['interfaces', 'wireguard']

class WireGuardInterfaceTest(unittest.TestCase):
    def setUp(self):
        self.session = ConfigSession(os.getpid())
        self._test_addr = ['192.0.2.1/26', '192.0.2.255/31', '192.0.2.64/32',
                          '2001:db8:1::ffff/64', '2001:db8:101::1/112']
        self._interfaces = ['wg0', 'wg1']

    def tearDown(self):
        self.session.delete(base_path)
        self.session.commit()
        del self.session

    def test_peer_setup(self):
        """
        Create WireGuard interfaces with associated peers
        """
        for intf in self._interfaces:
            peer = 'foo-' + intf
            psk = 'u2xdA70hkz0S1CG0dZlOh0aq2orwFXRIVrKo4DCvHgM='
            pubkey = 'n6ZZL7ph/QJUJSUUTyu19c77my1dRCDHkMzFQUO9Z3A='

            for addr in self._test_addr:
                self.session.set(base_path + [intf, 'address', addr])

            self.session.set(base_path + [intf, 'peer', peer, 'endpoint', '127.0.0.1:1337'])

            # Allow different prefixes to traverse the tunnel
            allowed_ips = ['0.0.0.0/0']
            for ip in allowed_ips:
                self.session.set(base_path + [intf, 'peer', peer, 'allowed-ips', ip])

            self.session.set(base_path + [intf, 'peer', peer, 'preshared-key', psk])
            self.session.set(base_path + [intf, 'peer', peer, 'pubkey', pubkey])
            self.session.commit()

if __name__ == '__main__':
    unittest.main()