How to use

org.spongycastle.crypto.engines.Salsa20Engine

constructor

  public Base()
  {
    super(new Salsa20Engine(), 8);
  }
}

  public Base()
  {
    super(new Salsa20Engine(), 8);
  }
}

/**
 * Creates a Salsa20 engine
 *
 * @param key the key to use
 * @return an initialized Salsa20 engine
 */
@SuppressWarnings("WeakerAccess")
public static Salsa20Engine createSalsa20(byte[] key) {
  MessageDigest md = Encryption.getMessageDigestInstance();
  KeyParameter keyParameter = new KeyParameter(md.digest(key));
  ParametersWithIV ivParameter = new ParametersWithIV(keyParameter, SALSA20_IV);
  Salsa20Engine engine = new Salsa20Engine();
  engine.init(true, ivParameter);
  return engine;
}

private void initialize(byte[] protectedStreamKey) {
  byte[] salsaKey = Sha256.hash(protectedStreamKey);
  try {
    salsa20Engine = new Salsa20Engine();
    salsa20Engine.init(true, new ParametersWithIV(new KeyParameter(salsaKey), Hex.decode(SALSA20IV)));
  } catch (Exception e) {
    throw new UnsupportedOperationException("Could not find provider '" + SALSA20_ALGORITHM + "'", e);
  }
}