public function getHsmInfo()
{
$str = "NC";
$len1 = strlen($str);
$buff = Bytes::shortToBytesBigEnd(intval($len1));
$str = Bytes::toStr($buff) . $str;
socket_write($this->socket, $str, strlen($str));
$rsp1 = socket_read($this->socket, 2);
$len2 = Bytes::bytesToShortBigEnd($rsp1, 0);
$rsp2 = socket_read($this->socket, $len2);
return $rsp2;
}
