[MySigningAtsha204Soft 1.5.4] HMAC linux keygenerator

[Mr.Osaka]

Hallo,
for linux user i wrote a helpful script for creating random key (32 hex) for
MyConfig.h - #define MY_HMAC_KEY with the correct formatting.

Stefano

#!/bin/bash

# mysensors_HMAC-key.sh
#
# generate a hex 32bit random key for 
# MyConfig.h - #define MY_HMAC_KEY 0x00,0x00,0x00,......
# 
#
# Created by Stefano Gottardi <st.gottardi (at) libero.it>
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# version 2 as published by the Free Software Foundation.

if ! which openssl > /dev/null
then
	echo "openssl is not installed"
	exit -1
fi

key=`openssl rand -hex 32`
COUNTER=2
MYSENS_KEY="0x${key:0:2}"

until [  $COUNTER -eq 64 ]; do
	STRING=${key:$COUNTER:2}
	MYSENS_KEY="$MYSENS_KEY,0x$STRING"
	let COUNTER+=2
done

echo $MYSENS_KEY

exit 0