TLS-handshake with own random numbers in Java

Question

I have a a piece of hardware which realises some crypto functions like random number generation (e.g a SmartCard). I would like to use this hardware during my TLS hadshake. Is it possible to do this, without implementing the TLS-Handshake by my own?

I tried to extend the class "SecureRandom" but the "next" methode is final so I can't override it so that it will return 'my' genetrated numbers.

So basically I would like to "outsource" all the crypto functions without implementing the TLS handshake in JAVA.

Thanks

Answer 1

Extend SecureRandomSpi instead. Then either implement a Provider or do a cheap SecureRandom as

  public MySecureRandom() 
    throws NoSuchAlgorithmException, NoSuchProviderException {
      super(new MySecureRandom(),null);
  }

(The implementation of next relies on the given SPI)

Then pass your SecureRandom as an argument to SSLContext.init.