Poor script to encrypt all pdf in specific folder with AES256 (qpdf)

pdfcrypt.sh

#!/bin/sh

stty -echo
while true; do
    read -s -p "Password: " password
    echo
    read -s -p "Password (again): " password2
    echo
    [ "$password" = "$password2" ] && break
    echo "Please try again"
done
stty echo

for file in $1/*.pdf ; do
    qpdf --encrypt $password $password 256 -- $file ${file%.pdf}-enc.pdf
done