small script to generate a pair of wireguard configurations that can be directly pasted to shell

adhocwg

#!/bin/sh

genscript() {
	local PRIV=${1:?"No private key given"}
	local PUB=${2:?"No public key given"}
	local OTHER=${3:?"No peer public key given"}
	local EP=${4:+"endpoint '$4':65534"}
	local LL=$(echo $PUB | base64 -d | hexdump -n8 -e '"fe80:" 4/2 ":%04x" "/64\n"')

	echo "ip link add dev wgadhoc type wireguard"
	echo "ip link set wgadhoc up"
	echo "ip address add $LL dev wgadhoc"
	echo "echo $PRIV > /tmp/wgadhoc.$PUB"
	echo "wg set wgadhoc private-key /tmp/wgadhoc.$PUB"
	echo "rm /tmp/wgadhoc.$PUB"
	echo "wg set wgadhoc listen-port 65534"
	echo "wg set wgadhoc peer $OTHER allowed-ips 0.0.0.0/0,::/0 $EP"
	echo
}

A_PRIV=$(wg genkey)
A_PUB=$(echo $A_PRIV | wg pubkey)

B_PRIV=$(wg genkey)
B_PUB=$(echo $B_PRIV | wg pubkey)

genscript $A_PRIV $A_PUB $B_PUB $1
genscript $B_PRIV $B_PUB $A_PUB $2