code: public void init(
          boolean             forEncryption,
          CipherParameters    param)
      {
          if (core == null)
          {
              core = new NativeRSACoreEngine();
          }
  
          core.init(forEncryption, param);
      }
docs: initialise the RSA engine.
  
  @param forEncryption true if we are encrypting, false otherwise.
  @param param the necessary RSA key parameters.