Bash functions for encrypting and decrypting tar.gz

encrypt-decrypt-tar.gz.sh

# These functions can be added to your .bash_aliases or your .bashrc
# So that it can help you encrypt or decrypt .tar.gz files

# Takes 2 params
# $1 is name of file or dir you want to tar
# $2 is name tar file, does not need the tar.gz extension it will added it.
function encrypt-tar-gz(){
        dataToEncrypt=$1
        fileName=$2".tar.gz"
        echo "Attempting to encrypt data to "$fileName

        # Old way which would warn about better encryption using -iter or -pbkdf2
        #tar -cvzf - $dataToEncrypt | openssl enc -aes-256-cbc -e > $fileName
        
        # Better way of encrypting with -pbkdf2
        tar -cvzf - $dataToEncrypt | openssl enc -aes-256-cbc -pbkdf2 > $fileName
}

# Can take 2 params 
# $1 is name of tar.gz to decrypt (If only this param is passed, will extract all contents of tar.gz to current dir)
# $2 is the name of the directory where you want to extract tar.gz contents to, if dir does not exist it will create it.
function decrypt-tar-gz(){
        fileToDecrypt=$1
        placeInDir=$2
        echo "Attempting to decrypt "$fileToDecrypt
        if [[ $placeInDir == "" ]];then 
                # Will extract contents from tar.gz to current directory
                # Old way to decrypt when not using pbkdf2
                #openssl enc -d -aes256 -in $fileToDecrypt | tar xz
                
                # Need to decrypt files encrypted with pbkdf2 cipher
                openssl aes-256-cbc -d -pbkdf2 -in $fileToDecrypt | tar xz
        else
                # Will decrypt the tar.gz file and place in a directory passed
                
                # Old way to decrypt
                # openssl enc -d -aes256 -in $fileToDecrypt | tar xz -C $placeInDir
                if [[ ! -d $placeInDir ]];then
                        echo "Directory "$placeInDir" does not exist, attempting to create it..."
                        mkdir -p $placeInDir
                fi
                # Decrypts files encrypted with pbkdf2 cipher
                openssl aes-256-cbc -d -pbkdf2 -in $fileToDecrypt | tar xz -C $placeInDir
        fi
}