0vpn-ipv6-prefix

#!/bin/bash

set -e

keyfile="$1"

hash=$(sha256sum "$keyfile")

echo fd"$(echo "$hash" | cut -c 1-2)":"$(echo "$hash" | cut -c 3-4)""$(echo "$hash" | cut -c 5-6)":"$(echo "$hash" | cut -c 7-8)""$(echo "$hash" | cut -c 9-10)":"$(echo "$hash" | cut -c 11-12)""$(echo "$hash" | cut -c 13-14)"