using System; using System.Collections.Generic; using System.Linq; using System.IO; using System.Security.Cryptography; namespace UTIL { #region CRC8 public class CRC8_2 { //CRC8Calc crc_dallas = new CRC8Calc(CRC8_POLY.CRC8_DALLAS_MAXIM); //checksum = crc_dallas.Checksum(testVal); //CRC8Calc crc = new CRC8Calc(CRC8_POLY.CRC8_CCITT); //checksum = crc.Checksum(testVal); public enum CRC8_POLY { CRC8 = 0xd5, CRC8_CCITT = 0x07, CRC8_DALLAS_MAXIM = 0x31, CRC8_SAE_J1850 = 0x1D, CRC_8_WCDMA = 0x9b, }; private byte[] table = new byte[256]; public byte Checksum(params byte[] val) { if (val == null) throw new ArgumentNullException("val"); byte c = 0; foreach (byte b in val) c = table[c ^ b]; return c; } public byte[] Table { get { return this.table; } set { this.table = value; } } public byte[] GenerateTable(CRC8_POLY polynomial) { byte[] csTable = new byte[256]; for (int i = 0; i < 256; ++i) { int curr = i; for (int j = 0; j < 8; ++j) { if ((curr & 0x80) != 0) curr = (curr << 1) ^ (int)polynomial; else curr <<= 1; } csTable[i] = (byte)curr; } return csTable; } public CRC8_2(CRC8_POLY polynomial) { this.table = this.GenerateTable(polynomial); } } public static class CRC8_3 { static byte[] CRC8_TABLE = new byte[]{ 0, 94, 188, 226, 97, 63, 221, 131, 194, 156, 126, 32, 163, 253, 31, 65, 157, 195, 33, 127, 252, 162, 64, 30, 95, 1, 227, 189, 62, 96, 130, 220, 35, 125, 159, 193, 66, 28, 254, 160, 225, 191, 93, 3, 128, 222, 60, 98, 190, 224, 2, 92, 223, 129, 99, 61, 124, 34, 192, 158, 29, 67, 161, 255, 70, 24, 250, 164, 39, 121, 155, 197, 132, 218, 56, 102, 229, 187, 89, 7, 219, 133, 103, 57, 186, 228, 6, 88, 25, 71, 165, 251, 120, 38, 196, 154, 101, 59, 217, 135, 4, 90, 184, 230, 167, 249, 27, 69, 198, 152, 122, 36, 248, 166, 68, 26, 153, 199, 37, 123, 58, 100, 134, 216, 91, 5, 231, 185, 140, 210, 48, 110, 237, 179, 81, 15, 78, 16, 242, 172, 47, 113, 147, 205, 17, 79, 173, 243, 112, 46, 204, 146, 211, 141, 111, 49, 178, 236, 14, 80, 175, 241, 19, 77, 206, 144, 114, 44, 109, 51, 209, 143, 12, 82, 176, 238, 50, 108, 142, 208, 83, 13, 239, 177, 240, 174, 76, 18, 145, 207, 45, 115, 202, 148, 118, 40, 171, 245, 23, 73, 8, 86, 180, 234, 105, 55, 213, 139, 87, 9, 235, 181, 54, 104, 138, 212, 149, 203, 41, 119, 244, 170, 72, 22, 233, 183, 85, 11, 136, 214, 52, 106, 43, 117, 151, 201, 74, 20, 246, 168, 116, 42, 200, 150, 21, 75, 169, 247, 182, 232, 10, 84, 215, 137, 107, 53 }; public static byte Calculate(byte[] data, byte init = 0) { byte result = init; for (var i = 0; i < data.Length; i++) { result = CRC8_TABLE[result ^ data[i]]; } return result; } } #endregion #region CRC16 public static class Crc16_1 { static Byte[] auchCRCHi = new Byte[] { 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40 }; static Byte[] auchCRCLo = new Byte[] { 0x00, 0xC0, 0xC1, 0x01, 0xC3, 0x03, 0x02, 0xC2, 0xC6, 0x06, 0x07, 0xC7, 0x05, 0xC5, 0xC4, 0x04, 0xCC, 0x0C, 0x0D, 0xCD, 0x0F, 0xCF, 0xCE, 0x0E, 0x0A, 0xCA, 0xCB, 0x0B, 0xC9, 0x09, 0x08, 0xC8, 0xD8, 0x18, 0x19, 0xD9, 0x1B, 0xDB, 0xDA, 0x1A, 0x1E, 0xDE, 0xDF, 0x1F, 0xDD, 0x1D, 0x1C, 0xDC, 0x14, 0xD4, 0xD5, 0x15, 0xD7, 0x17, 0x16, 0xD6, 0xD2, 0x12, 0x13, 0xD3, 0x11, 0xD1, 0xD0, 0x10, 0xF0, 0x30, 0x31, 0xF1, 0x33, 0xF3, 0xF2, 0x32, 0x36, 0xF6, 0xF7, 0x37, 0xF5, 0x35, 0x34, 0xF4, 0x3C, 0xFC, 0xFD, 0x3D, 0xFF, 0x3F, 0x3E, 0xFE, 0xFA, 0x3A, 0x3B, 0xFB, 0x39, 0xF9, 0xF8, 0x38, 0x28, 0xE8, 0xE9, 0x29, 0xEB, 0x2B, 0x2A, 0xEA, 0xEE, 0x2E, 0x2F, 0xEF, 0x2D, 0xED, 0xEC, 0x2C, 0xE4, 0x24, 0x25, 0xE5, 0x27, 0xE7, 0xE6, 0x26, 0x22, 0xE2, 0xE3, 0x23, 0xE1, 0x21, 0x20, 0xE0, 0xA0, 0x60, 0x61, 0xA1, 0x63, 0xA3, 0xA2, 0x62, 0x66, 0xA6, 0xA7, 0x67, 0xA5, 0x65, 0x64, 0xA4, 0x6C, 0xAC, 0xAD, 0x6D, 0xAF, 0x6F, 0x6E, 0xAE, 0xAA, 0x6A, 0x6B, 0xAB, 0x69, 0xA9, 0xA8, 0x68, 0x78, 0xB8, 0xB9, 0x79, 0xBB, 0x7B, 0x7A, 0xBA, 0xBE, 0x7E, 0x7F, 0xBF, 0x7D, 0xBD, 0xBC, 0x7C, 0xB4, 0x74, 0x75, 0xB5, 0x77, 0xB7, 0xB6, 0x76, 0x72, 0xB2, 0xB3, 0x73, 0xB1, 0x71, 0x70, 0xB0, 0x50, 0x90, 0x91, 0x51, 0x93, 0x53, 0x52, 0x92, 0x96, 0x56, 0x57, 0x97, 0x55, 0x95, 0x94, 0x54, 0x9C, 0x5C, 0x5D, 0x9D, 0x5F, 0x9F, 0x9E, 0x5E, 0x5A, 0x9A, 0x9B, 0x5B, 0x99, 0x59, 0x58, 0x98, 0x88, 0x48, 0x49, 0x89, 0x4B, 0x8B, 0x8A, 0x4A, 0x4E, 0x8E, 0x8F, 0x4F, 0x8D, 0x4D, 0x4C, 0x8C, 0x44, 0x84, 0x85, 0x45, 0x87, 0x47, 0x46, 0x86, 0x82, 0x42, 0x43, 0x83, 0x41, 0x81, 0x80, 0x40 }; public static UInt16 CRC16(ref Byte[] d, UInt16 len) { Byte crc_hi = 0xFF; Byte crc_lo = 0xFF; Byte j = 0; do { Byte i = (Byte)(crc_hi ^ d[j++]); crc_hi = (Byte)(crc_lo ^ (Byte)auchCRCHi[i]); crc_lo = (Byte)(auchCRCLo[i]); } while (--len != 0); return (UInt16)((crc_hi << 8) | crc_lo); } } #endregion #region CRC32 public static class Crc32_1 { private static readonly uint[] crcTable = new uint[256]; static Crc32_1() { const uint polynomial = 0xDEADDEAD; for (uint i = 0; i < 256; i++) { uint crc = i; for (int j = 0; j < 8; j++) { if ((crc & 1) == 1) { crc = (crc >> 1) ^ polynomial; } else { crc >>= 1; } } crcTable[i] = crc; } } public static uint Calculate(byte[] data) { uint crc = 0xFFFFFFFF; foreach (byte b in data) { byte tableIndex = (byte)(((crc) & 0xFF) ^ b); crc = crcTable[tableIndex] ^ (crc >> 8); } return ~crc; } } public class Crc32_2 : HashAlgorithm { public const UInt32 DefaultPolynomial = 0xedb88320; public const UInt32 DefaultSeed = 0xffffffff; private UInt32 hash; private UInt32 seed; private UInt32[] table; private static UInt32[] defaultTable; public Crc32_2() { table = InitializeTable(DefaultPolynomial); seed = DefaultSeed; Initialize(); } public Crc32_2(UInt32 polynomial, UInt32 seed) { table = InitializeTable(polynomial); this.seed = seed; Initialize(); } public override void Initialize() { hash = seed; } protected override void HashCore(byte[] buffer, int start, int length) { hash = CalculateHash(table, hash, buffer, start, length); } protected override byte[] HashFinal() { byte[] hashBuffer = UInt32ToBigEndianBytes(~hash); this.HashValue = hashBuffer; return hashBuffer; } public override int HashSize { get { return 32; } } public static UInt32 Compute(byte[] buffer) { return ~CalculateHash(InitializeTable(DefaultPolynomial), DefaultSeed, buffer, 0, buffer.Length); } public static UInt32 Compute(UInt32 seed, byte[] buffer) { return ~CalculateHash(InitializeTable(DefaultPolynomial), seed, buffer, 0, buffer.Length); } public static UInt32 Compute(UInt32 polynomial, UInt32 seed, byte[] buffer) { return ~CalculateHash(InitializeTable(polynomial), seed, buffer, 0, buffer.Length); } private static UInt32[] InitializeTable(UInt32 polynomial) { if (polynomial == DefaultPolynomial && defaultTable != null) return defaultTable; UInt32[] createTable = new UInt32[256]; for (int i = 0; i < 256; i++) { UInt32 entry = (UInt32)i; for (int j = 0; j < 8; j++) if ((entry & 1) == 1) entry = (entry >> 1) ^ polynomial; else entry = entry >> 1; createTable[i] = entry; } if (polynomial == DefaultPolynomial) defaultTable = createTable; return createTable; } private static UInt32 CalculateHash(UInt32[] table, UInt32 seed, byte[] buffer, int start, int size) { UInt32 crc = seed; for (int i = start; i < size; i++) unchecked { crc = (crc >> 8) ^ table[buffer[i] ^ crc & 0xff]; } return crc; } private byte[] UInt32ToBigEndianBytes(UInt32 x) { return new byte[] { (byte)((x >> 24) & 0xff), (byte)((x >> 16) & 0xff), (byte)((x >> 8) & 0xff), (byte)(x & 0xff) }; } public string Get(string FilePath) { Crc32_2 crc32 = new Crc32_2(); String hash = String.Empty; using (FileStream fs = File.Open(FilePath, FileMode.Open)) foreach (byte b in crc32.ComputeHash(fs)) hash += b.ToString("x2").ToLower(); return hash; } } public class Crc32_3 { private readonly uint[] _table; private const uint Poly = 0xedb88320; private uint ComputeChecksum(IEnumerable bytes) { var crc = 0xffffffff; foreach (var t in bytes) { var index = (byte)((crc & 0xff) ^ t); crc = (crc >> 8) ^ _table[index]; } return ~crc; } public IEnumerable ComputeChecksumBytes(IEnumerable bytes) { return BitConverter.GetBytes(ComputeChecksum(bytes)); } public Crc32_3() { _table = new uint[256]; for (uint i = 0; i < _table.Length; ++i) { var temp = i; for (var j = 8; j > 0; --j) if ((temp & 1) == 1) temp = (temp >> 1) ^ Poly; else temp >>= 1; _table[i] = temp; } } } public class Crc32_4 { byte[] GetCRC32(IEnumerable bytes) { var crcTable = new uint[256]; uint crc; for (uint i = 0; i < 256; i++) { crc = i; for (uint j = 0; j < 8; j++) crc = (crc & 1) != 0 ? (crc >> 1) ^ 0xEDB88320 : crc >> 1; crcTable[i] = crc; } crc = bytes.Aggregate(0xFFFFFFFF, (current, s) => crcTable[(current ^ s) & 0xFF] ^ (current >> 8)); crc ^= 0xFFFFFFFF; return BitConverter.GetBytes(crc); } } #endregion }