Java - Encoding message to String

Question

I'm trying to implement my own version of authorization for HTTP requests. Now I'm facing a problem that I don't know how to resolve.

As shown in code below, I'm encrypting String message using RSA algorithm. But the problem is that as a result I'm getting object of class SealedObject. I need to have the possibility to use this encrypted string as header - for now using REST client like Postman. So, my question is: How can I parse SealedObject to String? Or what should I do to encrypt the message to String? Is this even possible?

KeyPairGenerator kpg = KeyPairGenerator.getInstance("RSA");
KeyPair keyPair = kpg.generateKeyPair();

String message = "Secret message";

Cipher cipher = Cipher.getInstance("RSA");
cipher.init(Cipher.ENCRYPT_MODE, keyPair.getPublic());

SealedObject encryptedMessage = new SealedObject(message, cipher);

Thank you in advance :)

use the serialization interface

kelalaka
– kelalaka

2018-11-19 21:11:53 +00:00
Commented Nov 19, 2018 at 21:11 — kelalaka
– kelalaka, Commented Nov 19, 2018 at 21:11

stacker · Accepted Answer · 2018-11-19 21:28:36Z

the first thing that comes to mind is:

SealedObject is a Serializable Object which means you can convert it to bytes and then transform it to String using Base64: something like this:

ByteArrayOutputStream bos = new ByteArrayOutputStream();
ObjectOutput out = null;
try {
  out = new ObjectOutputStream(bos);   
  out.writeObject(sealedObject);
  out.flush();
  byte[] yourBytes = bos.toByteArray();
  String base64StringHeader = Base64.encodeBase64String(yourBytes);
} finally {
  try {
    bos.close();
  } catch (IOException ex) {
    // ignore close exception
  }
}

and then when you receive your request do something like this:

byte[] backToBytes = Base64.decodeBase64(base64StringHeader);
ByteArrayInputStream bis = new ByteArrayInputStream(backToBytes);
ObjectInput in = null;
try {
  in = new ObjectInputStream(bis);
  SealedObject = in.readObject(); 
  ...
} finally {
  try {
    if (in != null) {
      in.close();
    }
  } catch (IOException ex) {
    // ignore close exception
  }

}

Collectives™ on Stack Overflow

Java - Encoding message to String

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related