#!/bin/sh
if [ -z $2 ]; then
  echo "Usage: $0 authentic_file file_for_check";
exit

if
 md5sum $1 | cut -c1-32 > /tmp/f1.cksum
 md5sum $2 | cut -c1-32 > /tmp/f2.cksum
 sha1sum $1 | cut -c1-40 >> /tmp/f1.cksum
 sha1sum $2 | cut -c1-40 >> /tmp/f2.cksum

 res=`/usr/bin/cmp /tmp/f1.cksum /tmp/f2.cksum`
 
if [ -z "$res" ]; then
  echo "File is authentic"
else
  echo "File is not authentic"
fi

rm /tmp/f1.cksum /tmp/f2.cksum