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#!/bin/sh
#
# script to generate a keyfile that is encrypted with openssl
#
# Written 2005 by Markus Nass <generalstone@gmx.net>
# Improved 2006 by Jonas Meurer <jonas@freesources.org>
# Further improved 2006 by Markus Nass <generalstone@gmx.net>

usage() {
  echo "Usage: $0 <key>"
  exit 1
}

if [ "$1" = "" -o "$1" = "-h" -o "$1" = "--help" ]; then
  usage
fi

if [ -x /usr/bin/openssl ]; then
	key=`tempfile`
	dd if=/dev/random of=$key bs=1c count=256
	openssl enc -aes-256-cbc -e -salt -in $key -out $1
	#rm -f $key; key=""
	shred -uz $key; key=""
else
	echo "/usr/bin/openssl is not available" && exit 1
fi