decrypt #pdf

decrypt.sh

# Decrypt all pdf files in the current folder (./) and replace the encrypted files with the decrypted ones
# Prerequisites: 
# a. password.txt to be placed in the current folder.
# b. qpdf to be installed.
# Paste it to your ~/.zshrc file.
decrypt(){
    if [[ -z $1 ]]
    then
        DIR="$(pwd)"
    else        
        if [[ -d $1 ]]
        then
            DIR=$1
        else
            echo "Directory does not exist"
            return 1
        fi
    fi
    echo "Set directory to $DIR"


    for file in  $DIR/*.pdf 
    do 
        qpdf --password="$(<$DIR/password.txt)" --decrypt "$file" "$file.tmp"
        rm "$file"
        echo "Removed old file: $file"
        mv "$file.tmp" "$file"
        echo "Renamed new file: $file"
    done;
}