在php中計算CRC16 X25

我需要計算CRC X25變體的幫助，我有一個Java工具和一個在線工具，可以進行正確的轉換，但我一直無法自己重現。在php中計算CRC16 X25

字符串：40402900033231334C323031373030313839360000000000009001FFFFFFFF0000D656B759 輸入類型：十六進制 - >計算器CRC16

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

我的PHP代碼到目前爲止

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; 
}

這給了我結果如下

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

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

任何幫助將是非常讚賞

來源

2017-09-12 RonEskinder

解決它應用hexdec計算之前，可能會在未來有用。

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; 
}

來源

2017-09-12 17:09:43 RonEskinder

在php中計算CRC16 X25

回答

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