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Save robinlandstrom/b111240cd74ecab4d358f28b2d4fd8de to your computer and use it in GitHub Desktop.
| #!/bin/bash | |
| # MIT License | |
| # | |
| # Copyright (c) 2024 Robin Landström | |
| # | |
| # 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. | |
| readonly INTERFACE="wg0" | |
| # Generate peer keys | |
| readonly PRIVATE_KEY=$(wg genkey) | |
| readonly PUBLIC_KEY=$(echo ${PRIVATE_KEY} | wg pubkey) | |
| readonly PRESHARED_KEY=$(wg genpsk) | |
| # Read server key from interface | |
| readonly SERVER_PUBLIC_KEY=$(wg show ${INTERFACE} public-key) | |
| # Get next free peer IP (This will break after x.x.x.255) | |
| readonly PEER_ADDRESS=$(wg show ${INTERFACE} allowed-ips | cut -f 2 | awk -F'[./]' '{print $1"."$2"."$3"."1+$4"/"$5}' | sort -t '.' -k 1,1 -k 2,2 -k 3,3 -k 4,4 -n | tail -n1) | |
| # Add peer | |
| wg set ${INTERFACE} peer ${PUBLIC_KEY} preshared-key <(echo ${PRESHARED_KEY}) allowed-ips ${PEER_ADDRESS} | |
| # Logging | |
| echo "Added peer ${PEER_ADDRESS} with public key ${PUBLIC_KEY}" | |
| # Generate peer config QR code | |
| cat << END_OF_CONFIG | qrencode -t ANSIUTF8 | |
| [Interface] | |
| Address = ${PEER_ADDRESS} | |
| PrivateKey = ${PRIVATE_KEY} | |
| DNS = 8.8.8.8 (Your internal DNS server here) | |
| [Peer] | |
| PublicKey = ${SERVER_PUBLIC_KEY} | |
| PresharedKey = ${PRESHARED_KEY} | |
| AllowedIPs = 0.0.0.0/0 | |
| Endpoint = example.com:443 (Your external Wireguard endpoint here) | |
| END_OF_CONFIG |
I think that this line:
wg set ${INTERFACE} peer ${PUBLIC_KEY} preshared-key <(echo ${PRESHARED_KEY}) allowed-ips ${PEER_ADDRESS}
adds the client Peer info to the live configuration of the running server, which can be confirmed with wg show. It does not touch the persistent /etc/wireguard/wg0.conf file by itself.
If SaveConfig = True is set for the wg server, then when the wireguard ${INTERFACE} shuts down, the live config will be saved to /etc/wireguard/${INTERFACE}.conf
You can also manually export the live config to a file with wg-quick save wg0
https://manpages.debian.org/unstable/wireguard-tools/wg.8.en.html
https://manpages.debian.org/unstable/wireguard-tools/wg-quick.8.en.html
Thank you for the inspiration.
I believe I made an improved version: wg-peer
ping @robinlandstrom: under what license (if any) can I put your script, please? (should I decide to distribute it)
I asked the same question @colemar today, and if you also support putting your work into Public Domain, I believe explicitly mentioning CC0 here would be nice (because of the reasons: https://chrismorgan.info/blog/unlicense/)
Then, a permissive license like MIT or BSD* would do fine for me too :)
@sskras Added MIT license to the snip. Go ahead and use it :)
Hello!
Tried your script, it dont add anything to my "server"-interface. only generating the keys and the QR.
Do you have time to help?
Best regards