Review

class SecureMessagingWrapper {
   /**
    * Wraps the apdu buffer <code>capdu</code> of a command apdu.
    * As a side effect, this method increments the internal send
    * sequence counter maintained by this wrapper.
    *
    * @param capdu buffer containing the command apdu.
    *
    * @return length of the command apdu after wrapping.
    */
   public byte[] wrap(byte[] capdu) {
      try {
         byte[] wrappedApdu = wrapCommandAPDU(capdu, capdu.length);
         // System.arraycopy(wrappedApdu, 0, capdu, 0, wrappedApdu.length);
         return wrappedApdu;
      } catch (GeneralSecurityException gse) {
         gse.printStackTrace();
         throw new IllegalStateException(gse.toString());
      } catch (IOException ioe) {
         ioe.printStackTrace();
         throw new IllegalStateException(ioe.toString());
      }
   }

}