AES encryption/decryption using openssl

aes.sh

#!/bin/bash

function encrypt {
    input=$1
    echo "Encrypting $input..."
    openssl enc -aes-256-cbc -pbkdf2 -iter 800000 -in "$input" -out cipher.bin
    echo "Encrypted file saved to: $(pwd)/cypher.bin"
}

function decrypt {
    input=$1
    echo "Decrypting $input..."
    openssl enc -d -aes-256-cbc -pbkdf2 -iter 800000 -in "$input" -out plain.txt
    echo "Decrypted file saved to: $(pwd)/plain.txt"
}


if [ "$#" -ne 2 ]; then
    echo "Usage: $0 [encrypt|decrypt] [input_file]"
    exit 1
fi

action=$1
input_file=$2

case "$action" in
    encrypt)
        encrypt "$input_file"
        ;;
    decrypt)
        decrypt "$input_file"
        ;;
    *)
        echo "Invalid action. Use 'encrypt' or 'decrypt'."
        exit 1
        ;;
esac