#!/usr/bin/sh

if [[ $1 ]]; then
    char_num=$1;
else
    char_num=64;
fi

cat /dev/urandom | tr -dc 'a-zA-Z0-9!@#$%^&*' | fold -w $char_num \
    | head -n 1 | systemd-creds encrypt -qp --name=salt - - 2> /dev/null