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App.config

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+<?xml version="1.0" encoding="utf-8" ?>
+<configuration>
+    <startup> 
+        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
+    </startup>
+</configuration>

CRC.cs

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+using System;
+using System.Collections.Generic;
+using System.Net;
+
+namespace UCNL_FW_Update
+{
+    public class CRC
+    {
+        static readonly uint CRC32_POLY = 0x04C11DB7;
+        static readonly uint CRC32_POLY_R = 0xEDB88320;
+
+        static uint[] crc32_table = new uint[256];
+        static uint[] crc32r_table = new uint[256];
+
+        static readonly uint[] Crc32Table =  
+        {  
+          0x00000000,0x04C11DB7,0x09823B6E,0x0D4326D9,0x130476DC,0x17C56B6B,0x1A864DB2,0x1E475005,  
+            0x2608EDB8,0x22C9F00F,0x2F8AD6D6,0x2B4BCB61,0x350C9B64,0x31CD86D3,0x3C8EA00A,0x384FBDBD,  
+            0x4C11DB70,0x48D0C6C7,0x4593E01E,0x4152FDA9,0x5F15ADAC,0x5BD4B01B,0x569796C2,0x52568B75,  
+            0x6A1936C8,0x6ED82B7F,0x639B0DA6,0x675A1011,0x791D4014,0x7DDC5DA3,0x709F7B7A,0x745E66CD,  
+            0x9823B6E0,0x9CE2AB57,0x91A18D8E,0x95609039,0x8B27C03C,0x8FE6DD8B,0x82A5FB52,0x8664E6E5,  
+            0xBE2B5B58,0xBAEA46EF,0xB7A96036,0xB3687D81,0xAD2F2D84,0xA9EE3033,0xA4AD16EA,0xA06C0B5D,  
+            0xD4326D90,0xD0F37027,0xDDB056FE,0xD9714B49,0xC7361B4C,0xC3F706FB,0xCEB42022,0xCA753D95,  
+            0xF23A8028,0xF6FB9D9F,0xFBB8BB46,0xFF79A6F1,0xE13EF6F4,0xE5FFEB43,0xE8BCCD9A,0xEC7DD02D,  
+            0x34867077,0x30476DC0,0x3D044B19,0x39C556AE,0x278206AB,0x23431B1C,0x2E003DC5,0x2AC12072,  
+            0x128E9DCF,0x164F8078,0x1B0CA6A1,0x1FCDBB16,0x018AEB13,0x054BF6A4,0x0808D07D,0x0CC9CDCA,  
+            0x7897AB07,0x7C56B6B0,0x71159069,0x75D48DDE,0x6B93DDDB,0x6F52C06C,0x6211E6B5,0x66D0FB02,  
+            0x5E9F46BF,0x5A5E5B08,0x571D7DD1,0x53DC6066,0x4D9B3063,0x495A2DD4,0x44190B0D,0x40D816BA,  
+            0xACA5C697,0xA864DB20,0xA527FDF9,0xA1E6E04E,0xBFA1B04B,0xBB60ADFC,0xB6238B25,0xB2E29692,  
+            0x8AAD2B2F,0x8E6C3698,0x832F1041,0x87EE0DF6,0x99A95DF3,0x9D684044,0x902B669D,0x94EA7B2A,  
+            0xE0B41DE7,0xE4750050,0xE9362689,0xEDF73B3E,0xF3B06B3B,0xF771768C,0xFA325055,0xFEF34DE2,  
+            0xC6BCF05F,0xC27DEDE8,0xCF3ECB31,0xCBFFD686,0xD5B88683,0xD1799B34,0xDC3ABDED,0xD8FBA05A,  
+            0x690CE0EE,0x6DCDFD59,0x608EDB80,0x644FC637,0x7A089632,0x7EC98B85,0x738AAD5C,0x774BB0EB,  
+            0x4F040D56,0x4BC510E1,0x46863638,0x42472B8F,0x5C007B8A,0x58C1663D,0x558240E4,0x51435D53,  
+            0x251D3B9E,0x21DC2629,0x2C9F00F0,0x285E1D47,0x36194D42,0x32D850F5,0x3F9B762C,0x3B5A6B9B,  
+            0x0315D626,0x07D4CB91,0x0A97ED48,0x0E56F0FF,0x1011A0FA,0x14D0BD4D,0x19939B94,0x1D528623,  
+            0xF12F560E,0xF5EE4BB9,0xF8AD6D60,0xFC6C70D7,0xE22B20D2,0xE6EA3D65,0xEBA91BBC,0xEF68060B,  
+            0xD727BBB6,0xD3E6A601,0xDEA580D8,0xDA649D6F,0xC423CD6A,0xC0E2D0DD,0xCDA1F604,0xC960EBB3,  
+            0xBD3E8D7E,0xB9FF90C9,0xB4BCB610,0xB07DABA7,0xAE3AFBA2,0xAAFBE615,0xA7B8C0CC,0xA379DD7B,  
+            0x9B3660C6,0x9FF77D71,0x92B45BA8,0x9675461F,0x8832161A,0x8CF30BAD,0x81B02D74,0x857130C3,  
+            0x5D8A9099,0x594B8D2E,0x5408ABF7,0x50C9B640,0x4E8EE645,0x4A4FFBF2,0x470CDD2B,0x43CDC09C,  
+            0x7B827D21,0x7F436096,0x7200464F,0x76C15BF8,0x68860BFD,0x6C47164A,0x61043093,0x65C52D24,  
+            0x119B4BE9,0x155A565E,0x18197087,0x1CD86D30,0x029F3D35,0x065E2082,0x0B1D065B,0x0FDC1BEC,  
+            0x3793A651,0x3352BBE6,0x3E119D3F,0x3AD08088,0x2497D08D,0x2056CD3A,0x2D15EBE3,0x29D4F654,  
+            0xC5A92679,0xC1683BCE,0xCC2B1D17,0xC8EA00A0,0xD6AD50A5,0xD26C4D12,0xDF2F6BCB,0xDBEE767C,  
+            0xE3A1CBC1,0xE760D676,0xEA23F0AF,0xEEE2ED18,0xF0A5BD1D,0xF464A0AA,0xF9278673,0xFDE69BC4,  
+            0x89B8FD09,0x8D79E0BE,0x803AC667,0x84FBDBD0,0x9ABC8BD5,0x9E7D9662,0x933EB0BB,0x97FFAD0C,  
+            0xAFB010B1,0xAB710D06,0xA6322BDF,0xA2F33668,0xBCB4666D,0xB8757BDA,0xB5365D03,0xB1F740B4  
+        };
+
+
+        public static uint CRC32Software(byte[] pData, int Length)
+        {
+
+            uint nReg;
+            uint nTemp = 0;
+            int i, n;
+            nReg = 0xFFFFFFFF;
+            for (n = 0; n < Length; n++)
+            {
+                nReg ^= (uint)pData[n];
+                for (i = 0; i < 4; i++)
+                {
+                    nTemp = Crc32Table[(nReg >> 24) & 0xff];
+                    nReg <<= 8;
+                    nReg ^= nTemp;
+                }
+            }
+            return nReg;
+        } 
+
+
+
+        public CRC()
+        {
+            uint i, j;
+            uint c, cr;
+            for (i = 0; i < 256; ++i)
+            {
+                cr = i;
+                c = i << 24;
+                for (j = 8; j > 0; --j)
+                {
+                    c = ((c & 0x80000000) != 0) ? (c << 1) ^ CRC32_POLY : (c << 1);
+                    cr = ((cr & 0x00000001) != 0) ? (cr >> 1) ^ CRC32_POLY_R : (cr >> 1);
+                }
+                crc32_table[i] = c;
+                crc32r_table[i] = cr;
+            }
+        }
+
+        private uint CRC32(uint init_crc, uint[] buf, int len)
+        {
+            int bufIdx = 0;
+            uint v = 0;
+            uint crc;
+            crc = ~init_crc;
+            while(len >= 4)
+            {
+                v = (uint)IPAddress.HostToNetworkOrder((int)buf[bufIdx]);
+                bufIdx++;
+
+                crc = ( crc << 8 ) ^ crc32_table[0xFF & ( (crc >> 24) ^ (v ) )];
+                crc = ( crc << 8 ) ^ crc32_table[0xFF & ( (crc >> 24) ^ (v >> 8) )];
+                crc = ( crc << 8 ) ^ crc32_table[0xFF & ( (crc >> 24) ^ (v >> 16) )];
+                crc = ( crc << 8 ) ^ crc32_table[0xFF & ( (crc >> 24) ^ (v >> 24) )];
+                len -= 4;
+            }
+
+            if (len != 0)
+            {                
+                switch(len)
+                {
+                    case 1: v = 0xFF000000 & (uint)IPAddress.HostToNetworkOrder((int)buf[bufIdx]); bufIdx++; break;
+                    case 2: v = 0xFFFF0000 & (uint)IPAddress.HostToNetworkOrder((int)buf[bufIdx]); bufIdx++; break;
+                    case 3: v = 0xFFFFFF00 & (uint)IPAddress.HostToNetworkOrder((int)buf[bufIdx]); bufIdx++; break;
+                }
+
+                crc = ( crc << 8 ) ^ crc32_table[0xFF & ( (crc >> 24) ^ (v ) )];
+                crc = ( crc << 8 ) ^ crc32_table[0xFF & ( (crc >> 24) ^ (v >> 8) )];
+                crc = ( crc << 8 ) ^ crc32_table[0xFF & ( (crc >> 24) ^ (v >> 16) )];
+                crc = ( crc << 8 ) ^ crc32_table[0xFF & ( (crc >> 24) ^ (v >> 24) )];
+            }
+            return ~crc;
+        }
+
+        public uint CRC32(uint init_crc, byte[] data)
+        {            
+            int alignedBytes = data.Length;
+            if (data.Length % 4 != 0)
+                alignedBytes += (4 - data.Length % 4);
+
+            byte[] aligned = new byte[alignedBytes];
+            Array.Copy(data, aligned, data.Length);
+
+            uint[] uints = new uint[alignedBytes / 4];
+
+            byte[] temp = new byte[4];
+            for (int i = 0; i < alignedBytes / 4; i++)
+            {
+                Array.Copy(aligned, i * 4, temp, 0, 4);
+                //Array.Reverse(temp);
+                uints[i] = BitConverter.ToUInt32(temp, 0);
+            }
+
+
+            return CRC32(init_crc, uints, data.Length);
+        }
+
+
+    }
+}