How to use openssl to decrypt data encrypted by Java using AES

Question

I am generating an AES public key and IV (Initialization Vector) in Java to encrypt data. I need to decrypt this using openssl command. Is this possible given that I store the AES Key and the IV on the disk?

Following is the encryption logic

    Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
    cipher.init(Cipher.ENCRYPT_MODE, key, iv);
    byte[] stringBytes = pass.getBytes();
    byte[] raw = cipher.doFinal(stringBytes);
    return Base64.encodeBase64String(raw);

Generating the AES Key

   SecretKey secret_key = KeyGenerator.getInstance("AES").generateKey();

Generating the IV

   SecureRandom random = new SecureRandom();
   IvParameterSpec iv = new IvParameterSpec(random.generateSeed(16));

I am saving the IV and the AES Key in a file in a disk unencrypted. How do I now decrypt data using these two parameters using openssl?

Answer 1

Save them as hexadecimals and use e.g.

-K `cat key.hex` -iv `cat iv.hex`

so that's using the backticks instead of single quotation marks.