How to use

update

method

in

org.spongycastle.crypto.digests.SHA3Digest

private static byte[] doSha3(byte[] m1, byte[] m2, SHA3Digest digest, boolean bouncyencoder) {
  byte[] hash = new byte[digest.getDigestSize()];
  digest.update(m1, 0, m1.length);
  digest.update(m2, 0, m2.length);
  digest.doFinal(hash, 0);
  return hash;
}

private static byte[] sha3(byte[] message, int start, int length, SHA3Digest digest, boolean bouncyencoder) {
  byte[] hash = new byte[digest.getDigestSize()];
  if (message.length != 0) {
    digest.update(message, start, length);
  }
  digest.doFinal(hash, 0);
  return hash;
}

private static byte[] doSha3(byte[] message, SHA3Digest digest, boolean bouncyencoder) {
  byte[] hash = new byte[digest.getDigestSize()];
  if (message.length != 0) {
    digest.update(message, 0, message.length);
  }
  digest.doFinal(hash, 0);
  return hash;
}

  static void sha3(byte[] sharedKey)
  {
    SHA3Digest d = new SHA3Digest(256);
    d.update(sharedKey, 0, 32);
    d.doFinal(sharedKey, 0);
  }
}

public static byte[] Sha3256(byte[]... args) {
  SHA3Digest digest = new SHA3Digest();
  for (int i = 0; i < args.length; i++) {
    byte[] bytes = args[i];
    digest.update(bytes, 0, bytes.length);
  }
  byte[] out = new byte[256 / 8];
  digest.doFinal(out, 0);
  return out;
}

  private static byte[] doSha3(byte[] message) {
    SHA3Digest digest = new SHA3Digest(BIT_LENGTH);
    byte[] hash = new byte[digest.getDigestSize()];

    if (message.length != 0) {
      digest.update(message, 0, message.length);
    }
    digest.doFinal(hash, 0);
    return hash;
  }
}