WireGuard-tools

Pure Python reimplementation of wireguard-tools with an aim to provide easily reusable library functions to handle reading and writing of WireGuard® configuration files as well as interacting with WireGuard devices, both in-kernel through the Netlink API and userspace implementations through the cross-platform UAPI API.

Installation/Usage

    pipx install wireguard-tools
    wg-py --help

Implemented wg command line functionality,

• show - Show configuration and device information
• showconf - Dump current device configuration
• set - Change current configuration, add/remove/change peers
• setconf - Apply configuration to device
• addconf - Append configuration to device
• syncconf - Synchronizes configuration with device
• genkey, genpsk, pubkey - Key generation

Also includes some wg-quick functions,

• up, down - Create and configure WireGuard device and interface
• save - Dump device and interface configuration
• strip - Filter wg-quick settings from configuration

Needs root (sudo) access to query and configure the WireGuard devices through netlink. But root doesn't know about the currently active virtualenv, you may have to pass the full path to the script in the virtualenv, or use python3 -m wireguard_tools

    sudo `which wg-py` showconf <interface>
    sudo /path/to/venv/python3 -m wireguard_tools showconf <interface>

Library usage

Parsing WireGuard keys

The WireguardKey class will parse base64-encoded keys, the default base64 encoded string, but also an urlsafe base64 encoded variant. It also exposes both private key generating and public key deriving functions. Be sure to pass any base64 or hex encoded keys as 'str' and not 'bytes', otherwise it will assume the key was already decoded to its raw form.

from wireguard_tools import WireguardKey

private_key = WireguardKey.generate()
public_key = private_key.public_key()

# print base64 encoded key
print(public_key)

# print urlsafe encoded key
print(public_key.urlsafe)

# print hexadecimal encoded key
print(public_key.hex())

Working with WireGuard configuration files

The WireGuard configuration file is similar to, but not quite, the INI format because it has duplicate keys for both section names (i.e. [Peer]) as well as configuration keys within a section. According to the format description, AllowedIPs, Address, and DNS configuration keys 'may be specified multiple times'.

from wireguard_tools import WireguardConfig

with open("wg0.conf") as fh:
    config = WireguardConfig.from_wgconfig(fh)

Also supported are the "Friendly Tags" comments as introduced by prometheus-wireguard-exporter, where a [Peer] section can contain comments which add a user friendly description and/or additional attributes.

[Peer]
# friendly_name = Peer description for end users
# friendly_json = {"flat"="json", "dictionary"=1, "attribute"=2}
...

These will show up as additional friendly_name and friendly_json attributes on the WireguardPeer object.

We can also serialize and deserialize from a simple dict-based format which uses only basic JSON datatypes and, as such, can be used to convert to various formats (i.e. json, yaml, toml, pickle) either to disk or to pass over a network.

from wireguard_tools import WireguardConfig
from pprint import pprint

dict_config = dict(
    private_key="...",
    peers=[
        dict(
            public_key="...",
            preshared_key=None,
            endpoint_host="remote_host",
            endpoint_port=5120,
            persistent_keepalive=30,
            allowed_ips=["0.0.0.0/0"],
            friendly_name="Awesome Peer",
        ),
    ],
)
config = WireguardConfig.from_dict(dict_config)

dict_config = config.asdict()
pprint(dict_config)

Finally, there is a to_qrcode function that returns a segno.QRCode object which contains the configuration. This can be printed and scanned with the wireguard-android application. Careful with these because the QRcode exposes an easily captured copy of the private key as part of the configuration file. It is convenient, but definitely not secure.

from wireguard_tools import WireguardConfig
from pprint import pprint

dict_config = dict(
    private_key="...",
    peers=[
        dict(
            public_key="...",
            preshared_key=None,
            endpoint_host="remote_host",
            endpoint_port=5120,
            persistent_keepalive=30,
            allowed_ips=["0.0.0.0/0"],
        ),
    ],
)
config = WireguardConfig.from_dict(dict_config)

qr = config.to_qrcode()
qr.save("wgconfig.png")
qr.terminal(compact=True)

Working with WireGuard devices

from wireguard_tools import WireguardDevice

ifnames = [device.interface for device in WireguardDevice.list()]

device = WireguardDevice.get("wg0")

wgconfig = device.get_config()

device.set_config(wgconfig)

Bugs

The setconf/syncconf implementation is not quite correct. They currently use the same underlying set of operations but netlink-api's set_config implementation actually does something closer to syncconf, while the uapi-api implementation matches setconf.

This implementation has only been tested on Linux where we've only actively used a subset of the available functionality, i.e. the common scenario is configuring an interface only once with just a single peer.

Licenses

wireguard-tools is MIT licensed

Copyright (c) 2022-2024 Carnegie Mellon University

Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
of the Software, and to permit persons to whom the Software is furnished to do
so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

wireguard_tools/curve25519.py was released in the public domain

Copyright Nicko van Someren, 2021. This code is released into the public domain.
https://gist.github.com/nickovs/cc3c22d15f239a2640c185035c06f8a3

"WireGuard" is a registered trademark of Jason A. Donenfeld.