来自一个 mifare 标签的不同代码

Question

我有两个 reader：

mf7 (wiegand26)
桌面 USB reader (z2usb)

他们从标签发送不同的代码（韦根 - USB）：

13711284 - 6ECBD718

14056036 - CEA4D818

13409492 - 9E5BD718

如何转换？

Answer 1

有两个操作：NOT和反转位:)

    public static Int32 CARD_CODE_LENGTH = 5;
    static void Main(string[] args)
    {
        if (args.Length == 0) return;

        String value = args[0];

        if (value.Length < CARD_CODE_LENGTH)
            throw new ArgumentException();

        String cardCode = value.Substring(value.Length - CARD_CODE_LENGTH, CARD_CODE_LENGTH);
        String facilityCode = value.Substring(0, value.Length - cardCode.Length);

        Byte facility = ReverseWithLookupTable((Byte)(~Byte.Parse(facilityCode)));
        UInt16 card = (UInt16)(~UInt16.Parse(cardCode));
        Byte[] result = new Byte[2];

        var temp = BitConverter.GetBytes(card);
        for (var i = 0; i < temp.Length; result[i] = ReverseWithLookupTable(temp[i++]));

        Console.WriteLine("{0}{1}{2}", facility.ToString("X2"), result[1].ToString("X2"), result[0].ToString("X2"));
        Console.Read();
    }

来自一个 mifare 标签的不同代码

Different codes from one mifare tag

rfid

mifare