- using System;
- using System.Collections.Generic;
- using System.Text;
- using System.Runtime.Serialization.Formatters.Binary;
- using System.IO;
- namespace smsForCsharp.CRC
- {
- /// <summary>
- /// 消息CRC校验算法
- /// </summary>
- public class CRC
- {
- public static String getCrc16Code(String crcString)
- {
- // 转换成字节数组
- byte[] creBytes = HexString2Bytes(crcString);
- // 开始crc16校验码计算
- CRC16Util crc16 = new CRC16Util();
- crc16.reset();
- crc16.update(creBytes);
- int crc = crc16.getCrcValue();
- // 16进制的CRC码
- String crcCode = Convert.ToString(crc, 16).ToUpper();
- // 补足到4位
- if (crcCode.Length < 4)
- {
- // crcCode = StringUtil.lefgPadding(crcCode, '0', 4);
- crcCode = crcCode.PadLeft(4, '0');
- }
- return crcCode;
- }
- public static String RealHexToStr(String str)
- {
- String hText = "0123456789ABCDEF";
- StringBuilder bin = new StringBuilder();
- for (int i = 0; i < str.Length; i++)
- {
- bin.Append(hText[str[i] / 16]).Append(hText[str[i] % 16]).Append(' ');
- }
- return bin.ToString();
- }
- /**
- * 十六进制字符串转换成字节数组
- *
- * @param hexstr
- * @return
- */
- public static byte[] HexString2Bytes(String hexstr)
- {
- byte[] b = new byte[hexstr.Length / 2];
- int j = 0;
- for (int i = 0; i < b.Length; i++)
- {
- char c0 = hexstr[j++];
- char c1 = hexstr[j++];
- b[i] = (byte)((parse(c0) << 4) | parse(c1));
- }
- return b;
- }
- /**
- * 16进制char转换成整型
- *
- * @param c
- * @return
- */
- public static int parse(char c)
- {
- if (c >= 'a')
- return (c - 'a' + 10) & 0x0f;
- if (c >= 'A')
- return (c - 'A' + 10) & 0x0f;
- return (c - '0') & 0x0f;
- }
- public static string ByteArrayToHexString(byte[] data)//字节数组转为十六进制字符串
- {
- StringBuilder sb = new StringBuilder(data.Length * 3);
- foreach (byte b in data)
- sb.Append(Convert.ToString(b, 16).PadLeft(2, '0').PadRight(3, ' '));
- return sb.ToString().ToUpper();
- }
- }
- public class CRC16Util
- {
- /**CRC值*/
- private int value = 0xffff;
- private static int[] CRC16_TABLE = {
- 0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf,
- 0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7,
- 0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e,
- 0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876,
- 0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd,
- 0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5,
- 0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c,
- 0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974,
- 0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb,
- 0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3,
- 0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a,
- 0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72,
- 0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9,
- 0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1,
- 0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738,
- 0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70,
- 0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7,
- 0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff,
- 0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036,
- 0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e,
- 0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5,
- 0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd,
- 0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134,
- 0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c,
- 0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3,
- 0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb,
- 0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232,
- 0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a,
- 0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1,
- 0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9,
- 0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330,
- 0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78
- };
- /**
- * 计算一个字节数组的CRC值
- * @param data
- */
- public void update(byte[] data)
- {
- //int fcs = 0xffff;
- for (int i = 0; i < data.Length; i++)
- {
- // 1.value 右移8位(相当于除以256)
- // 2.value与进来的数据进行异或运算后再与0xFF进行与运算
- // 得到一个索引index,然后查找CRC16_TABLE表相应索引的数据
- // 1和2得到的数据再进行异或运算。
- value = (value >> 8) ^ CRC16_TABLE[(value ^ data[i]) & 0xff];
- }
- // 取反
- //return ~fcs;
- }
- /**
- * 计算一个byte的CRC值
- *
- * @param aByte
- */
- public void update(byte aByte)
- {
- value = (value >> 8) ^ CRC16_TABLE[(value ^ aByte) & 0xff];
- }
- /**
- * 重新设定CRC初始值
- */
- public void reset()
- {
- value = 0xffff;
- }
- /**
- * 获取计算好的CRC值
- *
- * @return
- */
- public int getCrcValue()
- {
- return ~value & 0xffff;
- }
- /// <summary>
- /// 生成FCS校验值
- /// </summary>
- /// <param name="ccc"></param>
- /// <returns></returns>
- public static byte[] makeCrc16(byte[] ccc)
- {
- CRC16Util crc16 = new CRC16Util();
- crc16.reset();
- crc16.update(ccc);
- //Console.WriteLine(RealHexToStr(crc16.getCrcValue().ToString()));
- byte[] test = intToByte(crc16.getCrcValue());
- //log(RealHexToStr(crc16.getCrcValue().ToString()));
- return test;
- }
- private static int[] copy(byte[] aa)
- {
- int[] cc = new int[aa.Length];
- for (int i = 0; i < aa.Length; i++)
- {
- cc[i] = aa[i];
- }
- return cc;
- }
- public static byte[] intToByte(int i)
- {
- byte[] abyte0 = new byte[4];
- abyte0[0] = (byte)(0xff & i);
- abyte0[1] = (byte)((0xff00 & i) >> 8);
- abyte0[2] = (byte)((0xff0000 & i) >> 16);
- abyte0[3] = (byte)((0xff000000 & i) >> 24);
- return abyte0;
- }
- private static void log(Object obj)
- {
- //(obj);
- }
- private static void printBytes(byte[] bytes)
- {
- for (int i = 0; i < bytes.Length; i++)
- {
- //System.out.print(bytes[i]+ "-");
- }
- }
- public static String RealHexToStr(String str)
- {
- String hText = "0123456789ABCDEF";
- StringBuilder bin = new StringBuilder();
- for (int i = 0; i < str.Length; i++)
- {
- bin.Append(hText[str[i] / 16]).Append(hText[str[i] % 16]).Append(' ');
- }
- return bin.ToString();
- }
- }
- }