Crc-16

[Pirahnaplant]

How can I find the CRC-16 of an array of bytes?

 

[jmcilhinney]

Seek and ye shall find.

crc 16 - MSDN Search

 

[Pirahnaplant]

Thank you, that code works perfect.

 

[PhuQuoc]

Vb.net - simple reflection and call function from dll

How can I find the CRC-16 of an array of bytes?

I HAVE A CLASS CALCULATE CRC16 IN C#

using System;
namespace ManMan89_Hash_Library
{
    public class CRC16
    {
        const ushort Polynomial = 0xA001;
        ushort[] Table = { 0, 49345, 49537, 320, 49921, 960, 640, 49729, 50689, 1728, 1920, 51009, 1280, 50625, 50305, 1088, 52225, 3264, 3456, 52545, 3840, 53185, 52865, 3648, 2560, 51905, 52097, 2880, 51457, 2496, 2176, 51265, 55297, 6336, 6528, 55617, 6912, 56257, 55937, 6720, 7680, 57025, 57217, 8000, 56577, 7616, 7296, 56385, 5120, 54465, 54657, 5440, 55041, 6080, 5760, 54849, 53761, 4800, 4992, 54081, 4352, 53697, 53377, 4160, 61441, 12480, 12672, 61761, 13056, 62401, 62081, 12864, 13824, 63169, 63361, 14144, 62721, 13760, 13440, 62529, 15360, 64705, 64897, 15680, 65281, 16320, 16000, 65089, 64001, 15040, 15232, 64321, 14592, 63937, 63617, 14400, 10240, 59585, 59777, 10560, 60161, 11200, 10880, 59969, 60929, 11968, 12160, 61249, 11520, 60865, 60545, 11328, 58369, 9408, 9600, 58689, 9984, 59329, 59009, 9792, 8704, 58049, 58241, 9024, 57601, 8640, 8320, 57409, 40961, 24768, 24960, 41281, 25344, 41921, 41601, 25152, 26112, 42689, 42881, 26432, 42241, 26048, 25728, 42049, 27648, 44225, 44417, 27968, 44801, 28608, 28288, 44609, 43521, 27328, 27520, 43841, 26880, 43457, 43137, 26688, 30720, 47297, 47489, 31040, 47873, 31680, 31360, 47681, 48641, 32448, 32640, 48961, 32000, 48577, 48257, 31808, 46081, 29888, 30080, 46401, 30464, 47041, 46721, 30272, 29184, 45761, 45953, 29504, 45313, 29120, 28800, 45121, 20480, 37057, 37249, 20800, 37633, 21440, 21120, 37441, 38401, 22208, 22400, 38721, 21760, 38337, 38017, 21568, 39937, 23744, 23936, 40257, 24320, 40897, 40577, 24128, 23040, 39617, 39809, 23360, 39169, 22976, 22656, 38977, 34817, 18624, 18816, 35137, 19200, 35777, 35457, 19008, 19968, 36545, 36737, 20288, 36097, 19904, 19584, 35905, 17408, 33985, 34177, 17728, 34561, 18368, 18048, 34369, 33281, 17088, 17280, 33601, 16640, 33217, 32897, 16448 };
        public string MAKE_HASH(byte[] BYTES)
        {
            ushort CRC = 0;
            for (int i = 0; i < BYTES.Length; ++i)
            {
                byte index = (byte)(CRC ^ BYTES[i]);
                CRC = (ushort)((CRC >> 8) ^ Table[index]);
            }
            return CRC.ToString("X2");
        }
        public string UserGuide()
        {
            string Kq = "\n\nprivate void crc16_Click(object sender, EventArgs e)\n";
            Kq = Kq + "{\n";
            Kq = Kq + "ManMan89_Hash_Library.CRC16 xCRC16 = new ManMan89_Hash_Library.CRC16();\n";
            Kq = Kq + "String Kq = xCRC16.MAKE_HASH(Encoding.UTF8.GetBytes(\"Hello World\"));\n";
            Kq = Kq + "Console.WriteLine(Kq);\n";
            Kq = Kq + "}\n";
            return Kq;
        }
    }
}

I HAVE A PROJECT VB.NET AND I WANT CALL FUNCTION MAKE HASH FROM ManMan89_Hash_Library.dll

    Private Sub Main_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Const DLLLibs As String = "C:\ManMan89_Hash_Library.dll"
        Try
            Dim ASM As [Assembly]
            ASM = [Assembly].LoadFrom(DLLLibs)
            Dim T As Type = ASM.GetType("ManMan89_Hash_Library.CRC16")
            Dim arg As Object() = {Encoding.UTF8.GetBytes("Hello World")}
            MsgBox(T.GetMethod("MAKE_HASH").Invoke(Activator.CreateInstance(T), arg).ToString())
        Catch ex As Exception
            MsgBox(ex.Message.ToUpper, , "Error")
        End Try
    End Sub

Very simple. Have a nice day