Rendszer binárisokról ujjlenyomat

Az előzőt Debian alatt teszteltem, itt a FreeBSD verzió (talán ez így kicsit kompatibilisebb):
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# ------------------------------------------
# --- CHECK SYSTEM BINARIES FINGERPRINTS ---
# ------------------------------------------

# For first time running the program creates an encrypted fingerprint
# datafile of the system binaries of particular folders.
#
# Second time it compares fingerprints of the binaries currently found
# on the system with the ones formerly stored.
#
# The encrypted fingerprint datafile should be stored somewhere else
# outside the current system because attackers can also create it
# by themselves!
#
# The program is advised to be run with root privileges.
# It uses gpg with symmetric encryption.
# Fingerprint datafile should be deleted and recreated after system update.


# Name of datafile that contains the fingerprints of system binaries
# (full path is allowed too)
OF="system_binaries_fingerprints.gpg"

# Name of temporary files
TF1=`mktemp -u tmp.XXXXXX`
TF2=`mktemp -u tmp.XXXXXX`

# Paths to the folders to look in
PT="/bin /sbin /usr/bin /usr/sbin /usr/local/bin /usr/local/sbin"


echo
if [ -f $OF ]
then

   echo Searching for binaries...
   find $PT -type f | sort | xargs sha1 > $TF1
   echo Decrypting datafile...
   gpg -q -o $TF2 -d $OF
   echo Comparing fingerprints...

   if diff $TF1 $TF2; then
      echo Results OK!
   fi

   rm -f $TF1 $TF2
   echo Done.
   echo

else

   echo No datafile found under the name $OF !
   echo Do you want to create it? [y/N]
#   read -n 1 -s ENC
   read ENC

   if [ "$ENC" = "y" ]
   then

      echo Searching for binaries...
      find $PT -type f | sort | xargs sha1 > $TF1
      echo Encrypting datafile...
      if gpg -q -o $OF -c $TF1

      then
         echo File has been created with the name $OF !
         echo Done.
         echo

      else
         echo Failure.
         echo

      fi

      rm -f $TF1

   else

      echo Nothing done.
      echo

   fi

fi