Locks a pdf with a custom (owner) password via pdftk. ONLY LOCKS EDITING.

lock_pdf.sh

#!/bin/sh
# Locks a pdf with a custom password via pdftk. 
# ONLY LOCKS EDITING. CAN STILL BE OPENEND WITHOUT PASSWORD
# HOW TO:
# pdftk has to be globally accessible. https://www.pdflabs.com/
# run sh lock.sh [filename_without_filetype] [password]

filename=$1
password=$2
echo locking "$filename".pdf &&
pdftk ./"$filename".pdf output ./"$filename"_locked.pdf owner_pw $password &&
echo deleting ./"$filename".pdf &&
rm ./"$filename".pdf &&
echo renaming ./"$filename"_locked.pdf &&
mv ./"$filename"_locked.pdf ./"$filename".pdf &&
echo succesfully locked "$filename".pdf