C#代码
1 using System; 2 using System.Collections.Generic; 3 using System.Linq; 4 using System.Text; 5 6 namespace TestCRC 7 { 8 /// <summary> 9 /// 循环冗余检验：CRC-16-CCITT查表法 10 /// </summary> 11 public static partial class CRCITU 12 { 13 /// <summary> 14 /// 计算给定长度数据的16位CRC 15 /// </summary> 16 /// <param name="data">要计算CRC的字节数组</param> 17 /// <returns>CRC值</returns> 18 public static UInt16 GetCrc16(Byte[] data) 19 { // 初始化 20 Int32 High = 0xFF; // 高字节 21 Int32 Low = 0xFF; // 低字节 22 if (data != null) 23 { 24 foreach (Byte b in data) 25 { 26 Int32 Index = Low ^ b; 27 Low = High ^ CRC16TABLE_LO[Index]; 28 High = CRC16TABLE_HI[Index]; 29 } 30 } 31 return (UInt16)(~((High << 8) + Low)); // 取反 32 } 33 34 /// <summary> 35 /// 检查给定长度数据的16位CRC是否正确 36 /// </summary> 37 /// <param name="data">要校验的字节数组</param> 38 /// <returns> 39 /// true：正确 40 /// false：错误 41 /// </returns> 42 /// <reamrks> 43 /// 字节数组最后2个字节为校验码，且低字节在前面，高字节在后面 44 /// </reamrks> 45 public static Boolean IsCrc16Good(Byte[] data) 46 { 47 // 初始化 48 Int32 High = 0xFF; 49 Int32 Low = 0xFF; 50 if (data != null) 51 { 52 foreach (Byte b in data) 53 { 54 Int32 Index = Low ^ b; 55 Low = High ^ CRC16TABLE_LO[Index]; 56 High = CRC16TABLE_HI[Index]; 57 } 58 } 59 60 return (High == 0xF0 && Low == 0xB8); 61 } 62 63 /// <summary> 64 /// CRC16查找表高字节 65 /// </summary> 66 private static readonly Byte[] CRC16TABLE_HI = 67 { 68 0x00, 0x11, 0x23, 0x32, 0x46, 0x57, 0x65, 0x74, 0x8C, 0x9D, 0xAF, 0xBE, 0xCA, 0xDB, 0xE9, 0xF8, 69 0x10, 0x01, 0x33, 0x22, 0x56, 0x47, 0x75, 0x64, 0x9C, 0x8D, 0xBF, 0xAE, 0xDA, 0xCB, 0xF9, 0xE8, 70 0x21, 0x30, 0x02, 0x13, 0x67, 0x76, 0x44, 0x55, 0xAD, 0xBC, 0x8E, 0x9F, 0xEB, 0xFA, 0xC8, 0xD9, 71 0x31, 0x20, 0x12, 0x03, 0x77, 0x66, 0x54, 0x45, 0xBD, 0xAC, 0x9E, 0x8F, 0xFB, 0xEA, 0xD8, 0xC9, 72 0x42, 0x53, 0x61, 0x70, 0x04, 0x15, 0x27, 0x36, 0xCE, 0xDF, 0xED, 0xFC, 0x88, 0x99, 0xAB, 0xBA, 73 0x52, 0x43, 0x71, 0x60, 0x14, 0x05, 0x37, 0x26, 0xDE, 0xCF, 0xFD, 0xEC, 0x98, 0x89, 0xBB, 0xAA, 74 0x63, 0x72, 0x40, 0x51, 0x25, 0x34, 0x06, 0x17, 0xEF, 0xFE, 0xCC, 0xDD, 0xA9, 0xB8, 0x8A, 0x9B, 75 0x73, 0x62, 0x50, 0x41, 0x35, 0x24, 0x16, 0x07, 0xFF, 0xEE, 0xDC, 0xCD, 0xB9, 0xA8, 0x9A, 0x8B, 76 0x84, 0x95, 0xA7, 0xB6, 0xC2, 0xD3, 0xE1, 0xF0, 0x08, 0x19, 0x2B, 0x3A, 0x4E, 0x5F, 0x6D, 0x7C, 77 0x94, 0x85, 0xB7, 0xA6, 0xD2, 0xC3, 0xF1, 0xE0, 0x18, 0x09, 0x3B, 0x2A, 0x5E, 0x4F, 0x7D, 0x6C, 78 0xA5, 0xB4, 0x86, 0x97, 0xE3, 0xF2, 0xC0, 0xD1, 0x29, 0x38, 0x0A, 0x1B, 0x6F, 0x7E, 0x4C, 0x5D, 79 0xB5, 0xA4, 0x96, 0x87, 0xF3, 0xE2, 0xD0, 0xC1, 0x39, 0x28, 0x1A, 0x0B, 0x7F, 0x6E, 0x5C, 0x4D, 80 0xC6, 0xD7, 0xE5, 0xF4, 0x80, 0x91, 0xA3, 0xB2, 0x4A, 0x5B, 0x69, 0x78, 0x0C, 0x1D, 0x2F, 0x3E, 81 0xD6, 0xC7, 0xF5, 0xE4, 0x90, 0x81, 0xB3, 0xA2, 0x5A, 0x4B, 0x79, 0x68, 0x1C, 0x0D, 0x3F, 0x2E, 82 0xE7, 0xF6, 0xC4, 0xD5, 0xA1, 0xB0, 0x82, 0x93, 0x6B, 0x7A, 0x48, 0x59, 0x2D, 0x3C, 0x0E, 0x1F, 83 0xF7, 0xE6, 0xD4, 0xC5, 0xB1, 0xA0, 0x92, 0x83, 0x7B, 0x6A, 0x58, 0x49, 0x3D, 0x2C, 0x1E, 0x0F 84 }; 85 86 /// <summary> 87 /// CRC16查找表低字节 88 /// </summary> 89 private static readonly Byte[] CRC16TABLE_LO = 90 { 91 0x00, 0x89, 0x12, 0x9B, 0x24, 0xAD, 0x36, 0xBF, 0x48, 0xC1, 0x5A, 0xD3, 0x6C, 0xE5, 0x7E, 0xF7, 92 0x81, 0x08, 0x93, 0x1A, 0xA5, 0x2C, 0xB7, 0x3E, 0xC9, 0x40, 0xDB, 0x52, 0xED, 0x64, 0xFF, 0x76, 93 0x02, 0x8B, 0x10, 0x99, 0x26, 0xAF, 0x34, 0xBD, 0x4A, 0xC3, 0x58, 0xD1, 0x6E, 0xE7, 0x7C, 0xF5, 94 0x83, 0x0A, 0x91, 0x18, 0xA7, 0x2E, 0xB5, 0x3C, 0xCB, 0x42, 0xD9, 0x50, 0xEF, 0x66, 0xFD, 0x74, 95 0x04, 0x8D, 0x16, 0x9F, 0x20, 0xA9, 0x32, 0xBB, 0x4C, 0xC5, 0x5E, 0xD7, 0x68, 0xE1, 0x7A, 0xF3, 96 0x85, 0x0C, 0x97, 0x1E, 0xA1, 0x28, 0xB3, 0x3A, 0xCD, 0x44, 0xDF, 0x56, 0xE9, 0x60, 0xFB, 0x72, 97 0x06, 0x8F, 0x14, 0x9D, 0x22, 0xAB, 0x30, 0xB9, 0x4E, 0xC7, 0x5C, 0xD5, 0x6A, 0xE3, 0x78, 0xF1, 98 0x87, 0x0E, 0x95, 0x1C, 0xA3, 0x2A, 0xB1, 0x38, 0xCF, 0x46, 0xDD, 0x54, 0xEB, 0x62, 0xF9, 0x70, 99 0x08, 0x81, 0x1A, 0x93, 0x2C, 0xA5, 0x3E, 0xB7, 0x40, 0xC9, 0x52, 0xDB, 0x64, 0xED, 0x76, 0xFF, 100 0x89, 0x00, 0x9B, 0x12, 0xAD, 0x24, 0xBF, 0x36, 0xC1, 0x48, 0xD3, 0x5A, 0xE5, 0x6C, 0xF7, 0x7E, 101 0x0A, 0x83, 0x18, 0x91, 0x2E, 0xA7, 0x3C, 0xB5, 0x42, 0xCB, 0x50, 0xD9, 0x66, 0xEF, 0x74, 0xFD, 102 0x8B, 0x02, 0x99, 0x10, 0xAF, 0x26, 0xBD, 0x34, 0xC3, 0x4A, 0xD1, 0x58, 0xE7, 0x6E, 0xF5, 0x7C, 103 0x0C, 0x85, 0x1E, 0x97, 0x28, 0xA1, 0x3A, 0xB3, 0x44, 0xCD, 0x56, 0xDF, 0x60, 0xE9, 0x72, 0xFB, 104 0x8D, 0x04, 0x9F, 0x16, 0xA9, 0x20, 0xBB, 0x32, 0xC5, 0x4C, 0xD7, 0x5E, 0xE1, 0x68, 0xF3, 0x7A, 105 0x0E, 0x87, 0x1C, 0x95, 0x2A, 0xA3, 0x38, 0xB1, 0x46, 0xCF, 0x54, 0xDD, 0x62, 0xEB, 0x70, 0xF9, 106 0x8F, 0x06, 0x9D, 0x14, 0xAB, 0x22, 0xB9, 0x30, 0xC7, 0x4E, 0xD5, 0x5C, 0xE3, 0x6A, 0xF1, 0x78 107 }; 108 } 109 }
Java代码
1 import com.example.utils.BitConverter; 2 3 4 5 /** 6 * 循环冗余检验：CRC-16-CCITT查表法 7 */ 8 public final class CRC16 { 9 10 public static void main(String[] args) { 11 short result=CRC16.GetCrc16(new byte[]{1,2,3}); 12 System.out.println(Integer.toHexString(result)); 13 } 14 /** 15 * 计算给定长度数据的16位CRC 16 * 17 * @param data 18 * 要计算CRC的字节数组 19 * @return CRC值 20 */ 21 public static short GetCrc16(byte[] data) { // 初始化 22 int High = 0xFF; // 高字节 23 int Low = 0xFF; // 低字节 24 if (data != null) { 25 for (byte b : data) { 26 int Index = Low ^ b; 27 Low = High ^ CRC16TABLE_LO[Index]; 28 High = CRC16TABLE_HI[Index]; 29 } 30 } 31 return (short) (~((High << 8) + Low)); // 取反 32 } 33 34 /** 35 * 检查给定长度数据的16位CRC是否正确 36 * 37 * @param data 38 * 要校验的字节数组 39 * @return true：正确 false：错误 40 * 41 * <reamrks> 字节数组最后2个字节为校验码，且低字节在前面，高字节在后面 </reamrks> 42 */ 43 public static boolean IsCrc16Good(byte[] data) { 44 // 初始化 45 int High = 0xFF; 46 int Low = 0xFF; 47 if (data != null) { 48 for (byte b : data) { 49 int Index = Low ^ b; 50 Low = High ^ CRC16TABLE_LO[Index]; 51 High = CRC16TABLE_HI[Index]; 52 } 53 } 54 55 return (High == 0xF0 && Low == 0xB8); 56 } 57 58 /** 59 * CRC16查找表高字节 60 */ 61 private static final int[] CRC16TABLE_HI = { 0x00, 0x11, 0x23, 0x32, 0x46, 62 0x57, 0x65, 0x74, 0x8C, 0x9D, 0xAF, 0xBE, 0xCA, 0xDB, 0xE9, 0xF8, 63 0x10, 0x01, 0x33, 0x22, 0x56, 0x47, 0x75, 0x64, 0x9C, 0x8D, 0xBF, 64 0xAE, 0xDA, 0xCB, 0xF9, 0xE8, 0x21, 0x30, 0x02, 0x13, 0x67, 0x76, 65 0x44, 0x55, 0xAD, 0xBC, 0x8E, 0x9F, 0xEB, 0xFA, 0xC8, 0xD9, 0x31, 66 0x20, 0x12, 0x03, 0x77, 0x66, 0x54, 0x45, 0xBD, 0xAC, 0x9E, 0x8F, 67 0xFB, 0xEA, 0xD8, 0xC9, 0x42, 0x53, 0x61, 0x70, 0x04, 0x15, 0x27, 68 0x36, 0xCE, 0xDF, 0xED, 0xFC, 0x88, 0x99, 0xAB, 0xBA, 0x52, 0x43, 69 0x71, 0x60, 0x14, 0x05, 0x37, 0x26, 0xDE, 0xCF, 0xFD, 0xEC, 0x98, 70 0x89, 0xBB, 0xAA, 0x63, 0x72, 0x40, 0x51, 0x25, 0x34, 0x06, 0x17, 71 0xEF, 0xFE, 0xCC, 0xDD, 0xA9, 0xB8, 0x8A, 0x9B, 0x73, 0x62, 0x50, 72 0x41, 0x35, 0x24, 0x16, 0x07, 0xFF, 0xEE, 0xDC, 0xCD, 0xB9, 0xA8, 73 0x9A, 0x8B, 0x84, 0x95, 0xA7, 0xB6, 0xC2, 0xD3, 0xE1, 0xF0, 0x08, 74 0x19, 0x2B, 0x3A, 0x4E, 0x5F, 0x6D, 0x7C, 0x94, 0x85, 0xB7, 0xA6, 75 0xD2, 0xC3, 0xF1, 0xE0, 0x18, 0x09, 0x3B, 0x2A, 0x5E, 0x4F, 0x7D, 76 0x6C, 0xA5, 0xB4, 0x86, 0x97, 0xE3, 0xF2, 0xC0, 0xD1, 0x29, 0x38, 77 0x0A, 0x1B, 0x6F, 0x7E, 0x4C, 0x5D, 0xB5, 0xA4, 0x96, 0x87, 0xF3, 78 0xE2, 0xD0, 0xC1, 0x39, 0x28, 0x1A, 0x0B, 0x7F, 0x6E, 0x5C, 0x4D, 79 0xC6, 0xD7, 0xE5, 0xF4, 0x80, 0x91, 0xA3, 0xB2, 0x4A, 0x5B, 0x69, 80 0x78, 0x0C, 0x1D, 0x2F, 0x3E, 0xD6, 0xC7, 0xF5, 0xE4, 0x90, 0x81, 81 0xB3, 0xA2, 0x5A, 0x4B, 0x79, 0x68, 0x1C, 0x0D, 0x3F, 0x2E, 0xE7, 82 0xF6, 0xC4, 0xD5, 0xA1, 0xB0, 0x82, 0x93, 0x6B, 0x7A, 0x48, 0x59, 83 0x2D, 0x3C, 0x0E, 0x1F, 0xF7, 0xE6, 0xD4, 0xC5, 0xB1, 0xA0, 0x92, 84 0x83, 0x7B, 0x6A, 0x58, 0x49, 0x3D, 0x2C, 0x1E, 0x0F }; 85 86 /** 87 * CRC16查找表低字节 88 */ 89 private static final int[] CRC16TABLE_LO = { 0x00, 0x89, 0x12, 0x9B, 0x24, 90 0xAD, 0x36, 0xBF, 0x48, 0xC1, 0x5A, 0xD3, 0x6C, 0xE5, 0x7E, 0xF7, 91 0x81, 0x08, 0x93, 0x1A, 0xA5, 0x2C, 0xB7, 0x3E, 0xC9, 0x40, 0xDB, 92 0x52, 0xED, 0x64, 0xFF, 0x76, 0x02, 0x8B, 0x10, 0x99, 0x26, 0xAF, 93 0x34, 0xBD, 0x4A, 0xC3, 0x58, 0xD1, 0x6E, 0xE7, 0x7C, 0xF5, 0x83, 94 0x0A, 0x91, 0x18, 0xA7, 0x2E, 0xB5, 0x3C, 0xCB, 0x42, 0xD9, 0x50, 95 0xEF, 0x66, 0xFD, 0x74, 0x04, 0x8D, 0x16, 0x9F, 0x20, 0xA9, 0x32, 96 0xBB, 0x4C, 0xC5, 0x5E, 0xD7, 0x68, 0xE1, 0x7A, 0xF3, 0x85, 0x0C, 97 0x97, 0x1E, 0xA1, 0x28, 0xB3, 0x3A, 0xCD, 0x44, 0xDF, 0x56, 0xE9, 98 0x60, 0xFB, 0x72, 0x06, 0x8F, 0x14, 0x9D, 0x22, 0xAB, 0x30, 0xB9, 99 0x4E, 0xC7, 0x5C, 0xD5, 0x6A, 0xE3, 0x78, 0xF1, 0x87, 0x0E, 0x95, 100 0x1C, 0xA3, 0x2A, 0xB1, 0x38, 0xCF, 0x46, 0xDD, 0x54, 0xEB, 0x62, 101 0xF9, 0x70, 0x08, 0x81, 0x1A, 0x93, 0x2C, 0xA5, 0x3E, 0xB7, 0x40, 102 0xC9, 0x52, 0xDB, 0x64, 0xED, 0x76, 0xFF, 0x89, 0x00, 0x9B, 0x12, 103 0xAD, 0x24, 0xBF, 0x36, 0xC1, 0x48, 0xD3, 0x5A, 0xE5, 0x6C, 0xF7, 104 0x7E, 0x0A, 0x83, 0x18, 0x91, 0x2E, 0xA7, 0x3C, 0xB5, 0x42, 0xCB, 105 0x50, 0xD9, 0x66, 0xEF, 0x74, 0xFD, 0x8B, 0x02, 0x99, 0x10, 0xAF, 106 0x26, 0xBD, 0x34, 0xC3, 0x4A, 0xD1, 0x58, 0xE7, 0x6E, 0xF5, 0x7C, 107 0x0C, 0x85, 0x1E, 0x97, 0x28, 0xA1, 0x3A, 0xB3, 0x44, 0xCD, 0x56, 108 0xDF, 0x60, 0xE9, 0x72, 0xFB, 0x8D, 0x04, 0x9F, 0x16, 0xA9, 0x20, 109 0xBB, 0x32, 0xC5, 0x4C, 0xD7, 0x5E, 0xE1, 0x68, 0xF3, 0x7A, 0x0E, 110 0x87, 0x1C, 0x95, 0x2A, 0xA3, 0x38, 0xB1, 0x46, 0xCF, 0x54, 0xDD, 111 0x62, 0xEB, 0x70, 0xF9, 0x8F, 0x06, 0x9D, 0x14, 0xAB, 0x22, 0xB9, 112 0x30, 0xC7, 0x4E, 0xD5, 0x5C, 0xE3, 0x6A, 0xF1, 0x78 }; 113 }
C代码
1 using System; 2 using System.Collections.Generic; 3 using System.Linq; 4 using System.Text; 5 6 namespace GovConsoleSuperior.Common 7 { 8 /// <summary> 9 /// 循环冗余检验：CRC-16-CCITT查表法 10 /// </summary> 11 public static partial class CRCITU 12 { 13 /// <summary> 14 /// 计算给定长度数据的16位CRC 15 /// </summary> 16 /// <param name="data">要计算CRC的字节数组</param> 17 /// <returns>CRC值</returns> 18 public static byte[] GetCrc16(Byte[] buffer) 19 { 20 int crc = 0; 21 int l = buffer.Length; 22 for (int i = 0; i < l; i++) 23 { 24 int by = (crc >> 8) & 0xff; 25 crc = (crc & 0xffff) << 8; 26 crc = (crc ^ table[(buffer[i] ^ by) & 0xff]) & 0xffff; 27 } 28 29 return GetCRCBytes(crc); 30 31 } 32 /// <summary> 33 /// 获取CRC字节数组 34 /// </summary> 35 /// <param name="crc">整形的CRC</param> 36 /// <returns>两字节的CRC字节数组</returns> 37 private static byte[] GetCRCBytes(int crc) 38 { 39 byte[] result = BitConverter.GetBytes(crc); 40 Array.Resize(ref result, 2); //只截取前面两个byte字节 41 42 return result; 43 } 44 45 46 47 48 static int[] table = { 49 0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50a5, 0x60c6, 0x70e7, 0x8108, 0x9129, 0xa14a, 50 0xb16b, 0xc18c, 0xd1ad, 0xe1ce, 0xf1ef, 0x1231, 0x0210, 0x3273, 0x2252, 0x52b5, 0x4294, 0x72f7, 0x62d6, 51 0x9339, 0x8318, 0xb37b, 0xa35a, 0xd3bd, 0xc39c, 0xf3ff, 0xe3de, 0x2462, 0x3443, 0x0420, 0x1401, 0x64e6, 52 0x74c7, 0x44a4, 0x5485, 0xa56a, 0xb54b, 0x8528, 0x9509, 0xe5ee, 0xf5cf, 0xc5ac, 0xd58d, 0x3653, 0x2672, 53 0x1611, 0x0630, 0x76d7, 0x66f6, 0x5695, 0x46b4, 0xb75b, 0xa77a, 0x9719, 0x8738, 0xf7df, 0xe7fe, 0xd79d, 54 0xc7bc, 0x48c4, 0x58e5, 0x6886, 0x78a7, 0x0840, 0x1861, 0x2802, 0x3823, 0xc9cc, 0xd9ed, 0xe98e, 0xf9af, 55 0x8948, 0x9969, 0xa90a, 0xb92b, 0x5af5, 0x4ad4, 0x7ab7, 0x6a96, 0x1a71, 0x0a50, 0x3a33, 0x2a12, 0xdbfd, 56 0xcbdc, 0xfbbf, 0xeb9e, 0x9b79, 0x8b58, 0xbb3b, 0xab1a, 0x6ca6, 0x7c87, 0x4ce4, 0x5cc5, 0x2c22, 0x3c03, 57 0x0c60, 0x1c41, 0xedae, 0xfd8f, 0xcdec, 0xddcd, 0xad2a, 0xbd0b, 0x8d68, 0x9d49, 0x7e97, 0x6eb6, 0x5ed5, 58 0x4ef4, 0x3e13, 0x2e32, 0x1e51, 0x0e70, 0xff9f, 0xefbe, 0xdfdd, 0xcffc, 0xbf1b, 0xaf3a, 0x9f59, 0x8f78, 59 0x9188, 0x81a9, 0xb1ca, 0xa1eb, 0xd10c, 0xc12d, 0xf14e, 0xe16f, 0x1080, 0x00a1, 0x30c2, 0x20e3, 0x5004, 60 0x4025, 0x7046, 0x6067, 0x83b9, 0x9398, 0xa3fb, 0xb3da, 0xc33d, 0xd31c, 0xe37f, 0xf35e, 0x02b1, 0x1290, 61 0x22f3, 0x32d2, 0x4235, 0x5214, 0x6277, 0x7256, 0xb5ea, 0xa5cb, 0x95a8, 0x8589, 0xf56e, 0xe54f, 0xd52c, 62 0xc50d, 0x34e2, 0x24c3, 0x14a0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405, 0xa7db, 0xb7fa, 0x8799, 0x97b8, 63 0xe75f, 0xf77e, 0xc71d, 0xd73c, 0x26d3, 0x36f2, 0x0691, 0x16b0, 0x6657, 0x7676, 0x4615, 0x5634, 0xd94c, 64 0xc96d, 0xf90e, 0xe92f, 0x99c8, 0x89e9, 0xb98a, 0xa9ab, 0x5844, 0x4865, 0x7806, 0x6827, 0x18c0, 0x08e1, 65 0x3882, 0x28a3, 0xcb7d, 0xdb5c, 0xeb3f, 0xfb1e, 0x8bf9, 0x9bd8, 0xabbb, 0xbb9a, 0x4a75, 0x5a54, 0x6a37, 66 0x7a16, 0x0af1, 0x1ad0, 0x2ab3, 0x3a92, 0xfd2e, 0xed0f, 0xdd6c, 0xcd4d, 0xbdaa, 0xad8b, 0x9de8, 0x8dc9, 67 0x7c26, 0x6c07, 0x5c64, 0x4c45, 0x3ca2, 0x2c83, 0x1ce0, 0x0cc1, 0xef1f, 0xff3e, 0xcf5d, 0xdf7c, 0xaf9b, 68 0xbfba, 0x8fd9, 0x9ff8, 0x6e17, 0x7e36, 0x4e55, 0x5e74, 0x2e93, 0x3eb2, 0x0ed1, 0x1ef0 69 }; 70 71 /// <summary> 72 /// 检查给定长度数据的16位CRC是否正确 73 /// </summary> 74 /// <param name="FromHeadToVaild">要校验的字节数组</param> 75 /// <returns> 76 /// true：正确 77 /// false：错误 78 /// </returns> 79 /// <reamrks> 80 /// 字节数组最后2个字节为校验码 81 /// </reamrks> 82 public static Boolean IsCrc16Good(Byte[] FromHeadToCRC) 83 { 84 byte[] FromHeadToVaild = GetHeadToVaildData(FromHeadToCRC); //头到验证域 85 byte[] CRCFromPackage = GetCRCFromPackage(FromHeadToCRC); //获取客户端传来的包中的CRC数组 86 byte[] TrueCRCValue = GetCrc16(FromHeadToVaild); //获取客户端传来的包应该的CRC数组 87 return BytesEquals(CRCFromPackage, TrueCRCValue); 88 } 89 /// <summary> 90 /// 比较两个字节数组是否相等 91 /// </summary> 92 /// <param name="b1">byte数组1</param> 93 /// <param name="b2">byte数组2</param> 94 /// <returns>是否相等</returns> 95 private static bool BytesEquals(byte[] b1, byte[] b2) 96 { 97 if (b1.Length != b2.Length) return false; 98 if (b1 == null || b2 == null) return false; 99 for (int i = 0; i < b1.Length; i++) 100 if (b1[i] != b2[i]) 101 return false; 102 return true; 103 } 104 105 106 /// <summary> 107 /// 获取客户端传来的包中的CRC数组 108 /// </summary> 109 /// <param name="FromHeadToCRC">从头到CRC校验域</param> 110 /// <returns>CRC数组</returns> 111 private static byte[] GetCRCFromPackage(byte[] FromHeadToCRC) 112 { 113 int iCRCLen = 2; //因为CRC占两个字节 114 byte[] CRCValue = new byte[iCRCLen]; //用于存储包中CRC的值 115 int i; 116 for (i = 0; i < iCRCLen; i++) //得到一个临时字节数组 117 { 118 CRCValue[i] = FromHeadToCRC[FromHeadToCRC.Length - iCRCLen + i]; 119 } 120 return CRCValue; 121 } 122 /// <summary> 123 /// 得到从头到有效数据的数据（不包含CRC验证域） 124 /// </summary> 125 /// <param name="FromHeadToCRC"></param> 126 /// <returns></returns> 127 private static byte[] GetHeadToVaildData(byte[] FromHeadToCRC) 128 { 129 int iLengh = FromHeadToCRC.Length - 2; //因为CRC占两个字节 130 byte[] FromHeadToVaild = new byte[iLengh]; //用于存储包头到有效数据域的bytes 131 int i; 132 for (i = 0; i < iLengh; i++) //得到一个临时字节数组 133 { 134 FromHeadToVaild[i] = FromHeadToCRC[i]; 135 } 136 return FromHeadToVaild; 137 138 } 139 140 } 141 142 }
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