在php中计算CRC16 X25

我需要计算CRC X25变体的帮助，我有一个Java工具和一个在线工具，可以进行正确的转换，但我一直无法自己重现。在php中计算CRC16 X25

字符串：40402900033231334C323031373030313839360000000000009001FFFFFFFF0000D656B759 输入类型：十六进制 - >计算器CRC16

Result: CRC-16/X-25 
0x6C49 <-- this is the value im trying to get in php from that string above.

我的PHP代码到目前为止

private static $CRC16_Table = array 
    (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, 
); 

public static function calculate($buffer) { 
    $length = strlen($buffer); 

    $crc = 0; 
    $i = 0; 
    while ($length--) { 
     $crc = (($crc >> 8) & 0xff)^(self::$CRC16_Table[(ord($buffer[$i++])^$crc) & 0xFF]); 
    } 

    return (($crc & 0xFFFF)^0x8000) - 0x8000; 
} 

public static function ComputeCrc($data) { 
    $crc = 0xFFFF; 

    foreach ($data as $d) { 
     $crc = self::$CRC16_Table[($d^$crc) & 0xFF]^($crc >> 8 & 0xFF); 
    } 

    $crc = $crc^0xFFFF; 
    $crc = $crc & 0xFFFF; 

    return $crc; 
}

这给了我结果如下

ComputeCrc(str_split("40402900033231334C323031373030313839360000000000009001FFFFFFFF0000D656B759", 2)); 
Result = ec71 <-- decHex result 

calculate("40402900033231334C323031373030313839360000000000009001FFFFFFFF0000D656B759"); 
Result = 48d7; <-- decHex result

任何帮助将是非常赞赏

来源

2017-09-12 RonEskinder

解决它应用hexdec计算之前，可能会在未来有用。

public static function ComputeCrc($data) { 
    $crc = 0xFFFF; 

    foreach ($data as $d) { 
     $d = hexdec($d); <-- This did the trick 
     $crc = self::$CRC16_Table[($d^$crc) & 0xFF]^($crc >> 8 & 0xFF); 
    } 

    $crc = $crc^0xFFFF; 
    $crc = $crc & 0xFFFF; 

    return $crc; 
}

来源

2017-09-12 17:09:43 RonEskinder

在php中计算CRC16 X25

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