Wireguard client/server config generator

new_peer.sh

#!/bin/bash

set -eu
set -o pipefail

dns_server=172.24.100.250
client_ip=$1
psk=$(wg genpsk)
client_privkey=$(wg genkey)
client_pubkey=$(wg pubkey <<<"$client_privkey")
server_pubkey=$(cat publickey)
server_endpoint=$(cat endpoint)

client_config="
[Interface]
PrivateKey = $client_privkey
Address = $client_ip
DNS = $dns_server

[Peer]
PublicKey = $server_pubkey
AllowedIPs = 172.16.0.0/12, 192.168.0.0/16, 10.0.0.0/8
Endpoint = $server_endpoint
PresharedKey = $psk
"

cat <<EOF
[Peer]
AllowedIPs=$client_ip/32
PublicKey=$client_pubkey
PresharedKey=$psk
EOF

qrencode -tansiutf8 <<< "$client_config"