Review

class PassportApduService {
   /**
    * Sends a <code>READ BINARY</code> command to the passport.
    * Secure messaging will be applied to the command and response
    * apdu.
    *
    * @param wrapper the secure messaging wrapper to use.
    * @param offset offset into the file.
    * @param le the expected length of the file to read.
    *
    * @return a byte array of length <code>le</code> with (part of)
    *         the contents of the currently selected file.
    */
   public byte[] sendReadBinary(SecureMessagingWrapper wrapper, short offset,
         int le) throws IOException {
      Apdu capdu = createReadBinaryAPDU(offset, le);
      if (wrapper != null) {
         capdu.wrapWith(wrapper);
      }
      byte[] rapdu = sendAPDU(capdu);
      if (wrapper != null) {
         rapdu = wrapper.unwrap(rapdu, rapdu.length);
      }
      byte[] result = new byte[rapdu.length - 2];
      System.arraycopy(rapdu, 0, result, 0, rapdu.length - 2);
      return result;
   }

}