php - AnViz 设备的校验和算法是什么？

Question

我正在研究一种通过 Linux/PHP 中的 TCP 直接连接到 AnViz 生物识别设备(TC550，使用 TC400.dll 方法)的方法，因此我设法获得了一些字符串以从设备中读取，我很难找出出现在每个代码的最后 2 个字节上的校验和，以便将我自己的指令发送到设备。

一个工作代码的例子可能是:

      function get_device_clock(){
      if(!$this->ip) return;
      if(!$this->open_socket()) return;
      $bytes = "A5";
      $bytes .= $this->fill_hex($this->id,8);
      $bytes .= "380000C4B8";

      $o = $this->comm($bytes);
      if(!trim($o)) return;
      $split = array();
      for($l = 0; $l < strlen($o); $l+=2){
          $split[] = substr($o,$l,2);
      }
      $year = hexdec($split[9]);
      if($year < 10) $year = "0" . $year;
      $year = "20$year";
      $month = hexdec($split[10]);
      if($month < 10) $month = "0$month";
      $day = hexdec($split[11]);
      if($day < 10) $day = "0$day";
      $hour = hexdec($split[12]);
      if($hour < 10) $hour = "0$hour";
      $min = hexdec($split[13]);
      if($min < 10) $min = "0$min";
      $sec = hexdec($split[14]);
      if($sec < 10) $sec = "0$sec";
      fclose($this->socket);
      return "$year-$month-$day $hour:$min:$sec\r\n";
  }

这将向端口 5010 的设备发送 A5 00 00 05 38 00 00 C4 B8，使其回复时间和日期。

因为这将启用实时:

A5 00 00 00 05 33 00 0F FF FF FF FF 01 FF FF FF FF FF FF FF FF FF FF 4E 37

这将列出最后的条目:

A5 00 00 00 05 40 00 02 01 19 FA FA

A5 00 00 00 06 3C 00 00 68 FE

A5 00 00 00 05 3C 00 00 A5 DB

现在的问题是，最后 2 个字节，第一个示例中的 C4 B8，第二个示例中的 4E 37，第三个示例中的 FA FA，68 FE 和 A5 DB，其中 ID 从 5 更改为 6，接缝成为某种校验和。到目前为止，我已经尝试了所有常见算法的变体，甚至使用了 Fsum Frontend，所有字节排序变体都没有成功。

在较长的指令中似乎也有一些差异，例如:

a5 00 00 00 05 73 00 29 01 00 00 00 00 17 ff ff ff 00 12 d6 93 00 58 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0 0 0 0 00 40 6e 57

a5 00 00 00 05 73 00 29 01 00 00 00 00 01 10 00 01 3e eb 18 08 00 54 00 65 00 73 00 74 00 00 00 00 00 00 00 00 00 00 00 0 0 0 0 0 00 50 6f 54

在这种情况下，校验和显示为 40 6E 57 和 50 6F 54

注意事项:要求接缝由以下部分组成:

A5 + 4 字节设备序列号 + 1 字节指令代码 + 可变长度内容 + 16/24 位校验和

您可以在 SDK BIO-OFFICE 获取生成此代码的 SDK，tc400.dll。

如果您能帮助解决这个问题，我们将不胜感激。提前TY。

*更新 - 感谢 Anviz 支持团队解决*

工作代码:

<?php 
 $crc_table = [
      0x0000,0x1189,0x2312,0x329B,0x4624,0x57AD,0x6536,0x74BF,0x8C48,0x9DC1,0xAF5A,0xBED3,0xCA6C,0xDBE5,0xE97E,0xF8F7,
    0x1081,0x0108,0x3393,0x221A,0x56A5,0x472C,0x75B7,0x643E,0x9CC9,0x8D40,0xBFDB,0xAE52,0xDAED,0xCB64,0xF9FF,0xE876,
    0x2102,0x308B,0x0210,0x1399,0x6726,0x76AF,0x4434,0x55BD,0xAD4A,0xBCC3,0x8E58,0x9FD1,0xEB6E,0xFAE7,0xC87C,0xD9F5,
    0x3183,0x200A,0x1291,0x0318,0x77A7,0x662E,0x54B5,0x453C,0xBDCB,0xAC42,0x9ED9,0x8F50,0xFBEF,0xEA66,0xD8FD,0xC974,
    0x4204,0x538D,0x6116,0x709F,0x0420,0x15A9,0x2732,0x36BB,0xCE4C,0xDFC5,0xED5E,0xFCD7,0x8868,0x99E1,0xAB7A,0xBAF3,
    0x5285,0x430C,0x7197,0x601E,0x14A1,0x0528,0x37B3,0x263A,0xDECD,0xCF44,0xFDDF,0xEC56,0x98E9,0x8960,0xBBFB,0xAA72,
    0x6306,0x728F,0x4014,0x519D,0x2522,0x34AB,0x0630,0x17B9,0xEF4E,0xFEC7,0xCC5C,0xDDD5,0xA96A,0xB8E3,0x8A78,0x9BF1,
    0x7387,0x620E,0x5095,0x411C,0x35A3,0x242A,0x16B1,0x0738,0xFFCF,0xEE46,0xDCDD,0xCD54,0xB9EB,0xA862,0x9AF9,0x8B70,
    0x8408,0x9581,0xA71A,0xB693,0xC22C,0xD3A5,0xE13E,0xF0B7,0x0840,0x19C9,0x2B52,0x3ADB,0x4E64,0x5FED,0x6D76,0x7CFF,
    0x9489,0x8500,0xB79B,0xA612,0xD2AD,0xC324,0xF1BF,0xE036,0x18C1,0x0948,0x3BD3,0x2A5A,0x5EE5,0x4F6C,0x7DF7,0x6C7E,
    0xA50A,0xB483,0x8618,0x9791,0xE32E,0xF2A7,0xC03C,0xD1B5,0x2942,0x38CB,0x0A50,0x1BD9,0x6F66,0x7EEF,0x4C74,0x5DFD,
    0xB58B,0xA402,0x9699,0x8710,0xF3AF,0xE226,0xD0BD,0xC134,0x39C3,0x284A,0x1AD1,0x0B58,0x7FE7,0x6E6E,0x5CF5,0x4D7C,
    0xC60C,0xD785,0xE51E,0xF497,0x8028,0x91A1,0xA33A,0xB2B3,0x4A44,0x5BCD,0x6956,0x78DF,0x0C60,0x1DE9,0x2F72,0x3EFB,
    0xD68D,0xC704,0xF59F,0xE416,0x90A9,0x8120,0xB3BB,0xA232,0x5AC5,0x4B4C,0x79D7,0x685E,0x1CE1,0x0D68,0x3FF3,0x2E7A,
    0xE70E,0xF687,0xC41C,0xD595,0xA12A,0xB0A3,0x8238,0x93B1,0x6B46,0x7ACF,0x4854,0x59DD,0x2D62,0x3CEB,0x0E70,0x1FF9,
    0xF78F,0xE606,0xD49D,0xC514,0xB1AB,0xA022,0x92B9,0x8330,0x7BC7,0x6A4E,0x58D5,0x495C,0x3DE3,0x2C6A,0x1EF1,0x0F78  
 ];
 /*************************************************
 * Calc CRC16 for Anviz TC-300,TC-400,TC-500,TC-550
 * 
 * @param binary $b
 */
 function tc_crc16($b){
  global $crc_table;
  $crc = 0xFFFF;
  for($l = 0; $l < strlen($b); $l++){
      $crc ^= ord($b[$l]);
      $crc = ($crc >> 8) ^ $crc_table[$crc & 255];
  }
  $res = strtoupper( dechex($crc) );
  return($res[2].$res[3].$res[0].$res[1]);
}  

/*****TEST AREA*****/
//$x = "A5000000033C0000"; //A5000000033C00003F90
 $x = "A5000000057300290100000000011000013EEB180800540065007300740000000000000000000000000001000000000050"; //A5000000057300290100000000011000013EEB1808005400650073007400000000000000000000000000010000000000506F54
echo tc_crc16(hex2bin($x)); 
?>

Answer 1

我咨询了研发团队，他们告诉我问题出在 CRC16 校验和上。请下载包含 CRC16Demo 的 CRC.rar 文件，让我知道它是否更适合您。 http://download.anviz.com/felix/CRC.rar

亲切的问候，

Anviz 支持团队

http://anviz.com