C#实现的4种常用数据校验方法小结(CRC校验,LRC校验,BCC校验,累加和校验)
更新时间：2022年03月15日 09:36:08 作者：暗影玄极
本文主要介绍了C#实现的4种常用数据校验方法小结(CRC校验,LRC校验,BCC校验,累加和校验)，文中通过示例代码介绍的非常详细，具有一定的参考价值，感兴趣的小伙伴们可以参考一下
CRC即循环冗余校验码（Cyclic Redundancy Check）：是数据通信领域中最常用的一种查错校验码，其特征是信息字段和校验字段的长度可以任意选定。循环冗余检查（CRC）是一种数据传输检错功能，对数据进行多项式计算，并将得到的结果附在帧的后面，接收设备也执行类似的算法，以保证数据传输的正确性和完整性。
CRC算法参数模型解释：
- NAME：参数模型名称。
- WIDTH：宽度，即CRC比特数。
- POLY：生成项的简写，以16进制表示。例如：CRC-32即是0x04C11DB7，忽略了最高位的"1"，即完整的生成项是0x104C11DB7。
- INIT：这是算法开始时寄存器（crc）的初始化预置值，十六进制表示。
- REFIN：待测数据的每个字节是否按位反转，True或False。
- REFOUT：在计算后之后，异或输出之前，整个数据是否按位反转，True或False。
- XOROUT：计算结果与此参数异或后得到最终的CRC值。
/// **********************************************************************
/// Name: CRC-4/ITU x4+x+1
/// Poly: 0x03
/// Init: 0x00
/// Refin: true
/// Refout: true
/// Xorout: 0x00
///*************************************************************************
public static byte[] Crc1(byte[] buffer, int start = 0, int len = 0)
{
if (buffer == null || buffer.Length == 0) return null;
if (start < 0) return null;
if (len == 0) len = buffer.Length - start;
int length = start + len;
if (length > buffer.Length) return null;
byte crc = 0;// Initial value
for (int i = start; i < length; i++)
{
crc ^= buffer[i];
for (int j = 0; j < 8; j++)
{
if ((crc & 1) > 0)
crc = (byte)((crc >> 1) ^ 0x0C);//0x0C = (reverse 0x03)>>(8-4)
else
crc = (byte)(crc >> 1);
}
}
return new byte[] { crc };
}
/// **********************************************************************
/// Name: CRC-5/EPC x5+x3+1
/// Poly: 0x09
/// Init: 0x09
/// Refin: false
/// Refout: false
/// Xorout: 0x00
///*************************************************************************
public static byte[] Crc2(byte[] buffer, int start = 0, int len = 0)
{
if (buffer == null || buffer.Length == 0) return null;
if (start < 0) return null;
if (len == 0) len = buffer.Length - start;
int length = start + len;
if (length > buffer.Length) return null;
byte crc = 0x48;// Initial value: 0x48 = 0x09<<(8-5)
for (int i = start; i < length; i++)
{
crc ^= buffer[i];
for (int j = 0; j < 8; j++)
{
if ((crc & 0x80) > 0)
crc = (byte)((crc << 1) ^ 0x48);// 0x48 = 0x09<<(8-5)
else
crc = (byte)(crc << 1);
}
}
return new byte[] { (byte)(crc >> 3) };
}
/// **********************************************************************
/// Name: CRC-5/ITU x5+x4+x2+1
/// Poly: 0x15
/// Init: 0x00
/// Refin: true
/// Refout: true
/// Xorout: 0x00
///*************************************************************************
public static byte[] Crc3(byte[] buffer, int start = 0, int len = 0)
{
if (buffer == null || buffer.Length == 0) return null;
if (start < 0) return null;
if (len == 0) len = buffer.Length - start;
int length = start + len;
if (length > buffer.Length) return null;
byte crc = 0;// Initial value
for (int i = start; i < length; i++)
{
crc ^= buffer[i];
for (int j = 0; j < 8; j++)
{
if ((crc & 1) > 0)
crc = (byte)((crc >> 1) ^ 0x15);// 0x15 = (reverse 0x15)>>(8-5)
else
crc = (byte)(crc >> 1);
}
}
return new byte[] { crc };
}
/// **********************************************************************
/// Name: CRC-5/USB x5+x2+1
/// Poly: 0x05
/// Init: 0x1F
/// Refin: true
/// Refout: true
/// Xorout: 0x1F
///*************************************************************************
public static byte[] Crc4(byte[] buffer, int start = 0, int len = 0)
{
if (buffer == null || buffer.Length == 0) return null;
if (start < 0) return null;
if (len == 0) len = buffer.Length - start;
int length = start + len;
if (length > buffer.Length) return null;
byte crc = 0x1F;// Initial value
for (int i = start; i < length; i++)
{
crc ^= buffer[i];
for (int j = 0; j < 8; j++)
{
if ((crc & 1) > 0)
crc = (byte)((crc >> 1) ^ 0x14);// 0x14 = (reverse 0x05)>>(8-5)
else
crc = (byte)(crc >> 1);
}
}
return new byte[] {(byte)( crc ^ 0x1F) };
}
/// **********************************************************************
/// Name: CRC-6/ITU x6+x+1
/// Poly: 0x03
/// Init: 0x00
/// Refin: true
/// Refout: true
/// Xorout: 0x00
///*************************************************************************
public static byte[] Crc5(byte[] buffer, int start = 0, int len = 0)
{
if (buffer == null || buffer.Length == 0) return null;
if (start < 0) return null;
if (len == 0) len = buffer.Length - start;
int length = start + len;
if (length > buffer.Length) return null;
byte crc = 0;// Initial value
for (int i = start; i < length; i++)
{
crc ^= buffer[i];
for (int j = 0; j < 8; j++)
{
if ((crc & 1) > 0)
crc = (byte)((crc >> 1) ^ 0x30);// 0x30 = (reverse 0x03)>>(8-6)
else
crc = (byte)(crc >> 1);
}
}
return new byte[] { crc };
}
/// **********************************************************************
/// Name: CRC-7/MMC x7+x3+1
/// Poly: 0x09
/// Init: 0x00
/// Refin: false
/// Refout: false
/// Xorout: 0x00
///*************************************************************************
public static byte[] Crc6(byte[] buffer, int start = 0, int len = 0)
{
if (buffer == null || buffer.Length == 0) return null;
if (start < 0) return null;
if (len == 0) len = buffer.Length - start;
int length = start + len;
if (length > buffer.Length) return null;
byte crc = 0;// Initial value
for (int i = start; i < length; i++)
{
crc ^= buffer[i];
for (int j = 0; j < 8; j++)
{
if ((crc & 0x80) > 0)
crc = (byte)((crc << 1) ^ 0x12);// 0x12 = 0x09<<(8-7)
else
crc = (byte)(crc << 1);
}
}
return new byte[] { (byte)(crc >> 1) };
}
/// **********************************************************************
/// Name: CRC8 x8+x2+x+1
/// Poly: 0x07
/// Init: 0x00
/// Refin: false
/// Refout: false
/// Xorout: 0x00
///*************************************************************************
public static byte[] Crc7(byte[] buffer, int start = 0, int len = 0)
{
if (buffer == null || buffer.Length == 0) return null;
if (start < 0) return null;
if (len == 0) len = buffer.Length - start;
int length = start + len;
if (length > buffer.Length) return null;
byte crc = 0;// Initial value
for (int i = start; i < length; i++)
{
crc ^= buffer[i];
for (int j = 0; j < 8; j++)
{
if ((crc & 0x80) > 0)
crc = (byte)((crc << 1) ^ 0x07);
else
crc = (byte)(crc << 1);
}
}
return new byte[] { crc };
}
/// **********************************************************************
/// Name: CRC-8/ITU x8+x2+x+1
/// Poly: 0x07
/// Init: 0x00
/// Refin: false
/// Refout: false
/// Xorout: 0x55
///*************************************************************************
public static byte[] Crc8(byte[] buffer, int start = 0, int len = 0)
{
if (buffer == null || buffer.Length == 0) return null;
if (start < 0) return null;
if (len == 0) len = buffer.Length - start;
int length = start + len;
if (length > buffer.Length) return null;
byte crc = 0;// Initial value
for (int i = start; i < length; i++)
{
crc ^= buffer[i];
for (int j = 0; j < 8; j++)
{
if ((crc & 0x80) > 0)
crc = (byte)((crc << 1) ^ 0x07);
else
crc = (byte)(crc << 1);
}
}
return new byte[] { (byte)(crc ^ 0x55) };
}
/// **********************************************************************
/// Name: CRC-8/MAXIM x8+x5+x4+1
/// Poly: 0x31
/// Init: 0x00
/// Refin: true
/// Refout: true
/// Xorout: 0x00
///*************************************************************************
public static byte[] Crc9(byte[] buffer, int start = 0, int len = 0)
{
if (buffer == null || buffer.Length == 0) return null;
if (start < 0) return null;
if (len == 0) len = buffer.Length - start;
int length = start + len;
if (length > buffer.Length) return null;
byte crc = 0;// Initial value
for (int i = start; i < length; i++)
{
crc ^= buffer[i];
for (int j = 0; j < 8; j++)
{
if ((crc & 1) > 0)
crc = (byte)((crc >> 1) ^ 0x8C);// 0x8C = reverse 0x31
else
crc = (byte)(crc >> 1);
}
}
return new byte[] { crc };
}
/// **********************************************************************
/// Name: CRC-8/ROHC x8+x2+x+1
/// Poly: 0x07
/// Init: 0xFF
/// Refin: true
/// Refout: true
/// Xorout: 0x00
///*************************************************************************
public static byte[] Crc10(byte[] buffer, int start = 0, int len = 0)
{
if (buffer == null || buffer.Length == 0) return null;
if (start < 0) return null;
if (len == 0) len = buffer.Length - start;
int length = start + len;
if (length > buffer.Length) return null;
byte crc = 0xFF;// Initial value
for (int i = start; i < length; i++)
{
crc ^= buffer[i];
for (int j = 0; j < 8; j++)
{
if ((crc & 1) > 0)
crc = (byte)((crc >> 1) ^ 0xE0);// 0xE0 = reverse 0x07
else
crc = (byte)(crc >> 1);
}
}
return new byte[] { crc };
}
/// Z1协议校验码计算
static byte[] table = { 0x00, 0x1C, 0x38, 0x24, 0x70, 0x6C, 0x48, 0x54, 0xE0, 0xFC,
0xD8, 0xC4, 0x90, 0x8C, 0xA8, 0xB4, 0xDC, 0xC0, 0xE4, 0xF8,
0xAC, 0xB0, 0x94, 0x88, 0x3C, 0x20, 0x04, 0x18, 0x4C, 0x50,
0x74, 0x68, 0xA4, 0xB8, 0x9C, 0x80, 0xD4, 0xC8, 0xEC, 0xF0,
0x44, 0x58, 0x7C, 0x60, 0x34, 0x28, 0x0C, 0x10, 0x78, 0x64,
0x40, 0x5C, 0x08, 0x14, 0x30, 0x2C, 0x98, 0x84, 0xA0, 0xBC,
0xE8, 0xF4, 0xD0, 0xCC, 0x54, 0x48, 0x6C, 0x70, 0x24, 0x38,
0x1C, 0x00, 0xB4, 0xA8, 0x8C, 0x90, 0xC4, 0xD8, 0xFC, 0xE0,
0x88, 0x94, 0xB0, 0xAC, 0xF8, 0xE4, 0xC0, 0xDC, 0x68, 0x74,
0x50, 0x4C, 0x18, 0x04, 0x20, 0x3C, 0xF0, 0xEC, 0xC8, 0xD4,
0x80, 0x9C, 0xB8, 0xA4, 0x10, 0x0C, 0x28, 0x34, 0x60, 0x7C,
0x58, 0x44, 0x2C, 0x30, 0x14, 0x08, 0x5C, 0x40, 0x64, 0x78,
0xCC, 0xD0, 0xF4, 0xE8, 0xBC, 0xA0, 0x84, 0x98, 0xA8, 0xB4,
0x90, 0x8C, 0xD8, 0xC4, 0xE0, 0xFC, 0x48, 0x54, 0x70, 0x6C,
0x38, 0x24, 0x00, 0x1C, 0x74, 0x68, 0x4C, 0x50, 0x04, 0x18,
0x3C, 0x20, 0x94, 0x88, 0xAC, 0xB0, 0xE4, 0xF8, 0xDC, 0xC0,
0x0C, 0x10, 0x34, 0x28, 0x7C, 0x60, 0x44, 0x58, 0xEC, 0xF0,
0xD4, 0xC8, 0x9C, 0x80, 0xA4, 0xB8, 0xD0, 0xCC, 0xE8, 0xF4,
0xA0, 0xBC, 0x98, 0x84, 0x30, 0x2C, 0x08, 0x14, 0x40, 0x5C,
0x78, 0x64, 0xFC, 0xE0, 0xC4, 0xD8, 0x8C, 0x90, 0xB4, 0xA8,
0x1C, 0x00, 0x24, 0x38, 0x6C, 0x70, 0x54, 0x48, 0x20, 0x3C,
0x18, 0x04, 0x50, 0x4C, 0x68, 0x74, 0xC0, 0xDC, 0xF8, 0xE4,
0xB0, 0xAC, 0x88, 0x94, 0x58, 0x44, 0x60, 0x7C, 0x28, 0x34,
0x10, 0x0C, 0xB8, 0xA4, 0x80, 0x9C, 0xC8, 0xD4, 0xF0, 0xEC,
0x84, 0x98, 0xBC, 0xA0, 0xF4, 0xE8, 0xCC, 0xD0, 0x64, 0x78,
0x5C, 0x40, 0x14, 0x08, 0x2C, 0x30
};
public static byte[] Crc11(byte[] buffer, int start = 0, int len = 0)
{
if (buffer == null || buffer.Length == 0) return null;
if (start < 0) return null;
if (len == 0) len = buffer.Length - start;
int length = start + len;
if (length > buffer.Length) return null;
int i;
byte crc = 0x00;
int tableIndex;
for (i = start; i < length; i++)
{
tableIndex = crc ^ (buffer[i] & 0xFF);
crc = table[tableIndex];
}
return new byte[] { crc };
}
/// **********************************************************************
/// Name: CRC-12 x16+x12+x5+1
/// Poly: 0x80
/// Init: 0x0000
/// Refin: true
/// Refout: true
/// Xorout: 0x0000
///*************************************************************************
public static byte[] Crc12(byte[] buffer, int start = 0, int len = 0)
{
if (buffer == null || buffer.Length == 0) return null;
if (start < 0) return null;
if (len == 0) len = buffer.Length - start;
int length = start + len;
if (length > buffer.Length) return null;
ushort crc = 0;// Initial value
short iQ = 0, iR = 0;
for (int i = start; i < length; i++)
{
// 多项式除法
// 如果该位为1
if ((buffer[i] & (0x80 >> iR)) > 0)
{
// 则在余数尾部添1否则添0
crc |= 0x01;
}
// 如果12位除数中的最高位为1，则够除
if (crc >= 0x1000)
{
crc ^= 0x180D;
}
crc <<= 1;
iR++;
if (8 == iR)
{
iR = 0;
iQ++;
}
}
// 对后面添加的12个0做处理
for (int i = 0; i < 12; i++)
{
if (crc >= 0x1000)
{
crc ^= 0x180D;
}
crc <<= 1;
}
crc >>= 1;
byte[] ret = BitConverter.GetBytes(crc);
Array.Reverse(ret);
return ret;
}
/// **********************************************************************
/// Name: CRC-16/CCITT x16+x12+x5+1
/// Poly: 0x1021
/// Init: 0x0000
/// Refin: true
/// Refout: true
/// Xorout: 0x0000
///*************************************************************************
public static byte[] Crc13(byte[] buffer, int start = 0, int len = 0)
{
if (buffer == null || buffer.Length == 0) return null;
if (start < 0) return null;
if (len == 0) len = buffer.Length - start;
int length = start + len;
if (length > buffer.Length) return null;
ushort crc = 0;// Initial value
for (int i = start; i < length; i++)
{
crc ^= buffer[i];
for (int j = 0; j < 8; j++)
{
if ((crc & 1) > 0)
crc = (ushort)((crc >> 1) ^ 0x8408);// 0x8408 = reverse 0x1021
else
crc = (ushort)(crc >> 1);
}
}
byte[] ret = BitConverter.GetBytes(crc);
Array.Reverse(ret);
return ret;
}
/// **********************************************************************
/// Name: CRC-16/CCITT FALSE x16+x12+x5+1
/// Poly: 0x1021
/// Init: 0xFFFF
/// Refin: false
/// Refout: false
/// Xorout: 0x0000
///*************************************************************************
public static byte[] Crc14(byte[] buffer, int start = 0, int len = 0)
{
if (buffer == null || buffer.Length == 0) return null;
if (start < 0) return null;
if (len == 0) len = buffer.Length - start;
int length = start + len;
if (length > buffer.Length) return null;
ushort crc = 0xFFFF;// Initial value
for (int i = start; i < length; i++)
{
crc ^= (ushort)(buffer[i] << 8);
for (int j = 0; j < 8; j++)
{
if ((crc & 0x8000) > 0)
crc = (ushort)((crc << 1) ^ 0x1021);
else
crc = (ushort)(crc << 1);
}
}
byte[] ret = BitConverter.GetBytes(crc);
Array.Reverse(ret);
return ret;
}
/// **********************************************************************
/// Name: CRC-16/DNP x16+x13+x12+x11+x10+x8+x6+x5+x2+1
/// Poly: 0x3D65
/// Init: 0x0000
/// Refin: true
/// Refout: true
/// Xorout: 0xFFFF
///*************************************************************************
public static byte[] Crc15(byte[] buffer, int start = 0, int len = 0)
{
if (buffer == null || buffer.Length == 0) return null;
if (start < 0) return null;
if (len == 0) len = buffer.Length - start;
int length = start + len;
if (length > buffer.Length) return null;
ushort crc = 0;// Initial value
for (int i = start; i < length; i++)
{
crc ^= buffer[i];
for (int j = 0; j < 8; j++)
{
if ((crc & 1) > 0)
crc = (ushort)((crc >> 1) ^ 0xA6BC);// 0xA6BC = reverse 0x3D65
else
crc = (ushort)(crc >> 1);
}
}
byte[] ret = BitConverter.GetBytes((ushort)~crc);
Array.Reverse(ret);
return ret;
}
/// **********************************************************************
/// Name: CRC-16/IBM x16+x15+x2+1
/// Poly: 0x8005
/// Init: 0x0000
/// Refin: true
/// Refout: true
/// Xorout: 0x0000
///*************************************************************************
public static byte[] Crc16(byte[] buffer, int start = 0, int len = 0)
{
if (buffer == null || buffer.Length == 0) return null;
if (start < 0) return null;
if (len == 0) len = buffer.Length - start;
int length = start + len;
if (length > buffer.Length) return null;
ushort crc = 0;// Initial value
for (int i = start; i < length; i++)
{
crc ^= buffer[i];
for (int j = 0; j < 8; j++)
{
if ((crc & 1) > 0)
crc = (ushort)((crc >> 1) ^ 0xA001);// 0xA001 = reverse 0x8005
else
crc = (ushort)(crc >> 1);
}
}
byte[] ret = BitConverter.GetBytes(crc);
Array.Reverse(ret);
return ret;
}
/// **********************************************************************
/// Name: CRC-16/MAXIM x16+x15+x2+1
/// Poly: 0x8005
/// Init: 0x0000
/// Refin: true
/// Refout: true
/// Xorout: 0xFFFF
///*************************************************************************
public static byte[] Crc17(byte[] buffer, int start = 0, int len = 0)
{
if (buffer == null || buffer.Length == 0) return null;
if (start < 0) return null;
if (len == 0) len = buffer.Length - start;
int length = start + len;
if (length > buffer.Length) return null;
ushort crc = 0;// Initial value
for (int i = start; i < length; i++)
{
crc ^= buffer[i];
for (int j = 0; j < 8; j++)
{
if ((crc & 1) > 0)
crc = (ushort)((crc >> 1) ^ 0xA001);// 0xA001 = reverse 0x8005
else
crc = (ushort)(crc >> 1);
}
}
byte[] ret = BitConverter.GetBytes((ushort)~crc);
Array.Reverse(ret);
return ret;
}
/// **********************************************************************
/// Name: CRC-16/MODBUS x16+x15+x2+1
/// Poly: 0x8005
/// Init: 0xFFFF
/// Refin: true
/// Refout: true
/// Xorout: 0x0000
///*************************************************************************
public static byte[] Crc18(byte[] buffer, int start = 0, int len = 0)
{
if (buffer == null || buffer.Length == 0) return null;
if (start < 0) return null;
if (len == 0) len = buffer.Length - start;
int length = start + len;
if (length > buffer.Length) return null;
ushort crc = 0xFFFF;// Initial value
for (int i = start; i < length; i++)
{
crc ^= buffer[i];
for (int j = 0; j < 8; j++)
{
if ((crc & 1) > 0)
crc = (ushort)((crc >> 1) ^ 0xA001);// 0xA001 = reverse 0x8005
else
crc = (ushort)(crc >> 1);
}
}
byte[] ret = BitConverter.GetBytes(crc);
Array.Reverse(ret);
return ret;
}
/// **********************************************************************
/// Name: CRC-16/USB x16+x15+x2+1
/// Poly: 0x8005
/// Init: 0xFFFF
/// Refin: true
/// Refout: true
/// Xorout: 0xFFFF
///*************************************************************************
public static byte[] Crc19(byte[] buffer, int start = 0, int len = 0)
{
if (buffer == null || buffer.Length == 0) return null;
if (start < 0) return null;
if (len == 0) len = buffer.Length - start;
int length = start + len;
if (length > buffer.Length) return null;
ushort crc = 0xFFFF;// Initial value
for (int i = start; i < length; i++)
{
crc ^= buffer[i];
for (int j = 0; j < 8; j++)
{
if ((crc & 1) > 0)
crc = (ushort)((crc >> 1) ^ 0xA001);// 0xA001 = reverse 0x8005
else
crc = (ushort)(crc >> 1);
}
}
byte[] ret = BitConverter.GetBytes((ushort)~crc);
Array.Reverse(ret);
return ret;
}
/// **********************************************************************
/// Name: CRC-16/X25 x16+x12+x5+1
/// Poly: 0x1021
/// Init: 0xFFFF
/// Refin: true
/// Refout: true
/// Xorout: 0xFFFF
///*************************************************************************
public static byte[] Crc20(byte[] buffer, int start = 0, int len = 0)
{
if (buffer == null || buffer.Length == 0) return null;
if (start < 0) return null;
if (len == 0) len = buffer.Length - start;
int length = start + len;
if (length > buffer.Length) return null;
ushort crc = 0xFFFF;// Initial value
for (int i = start; i < length; i++)
{
crc ^= buffer[i];
for (int j = 0; j < 8; j++)
{
if ((crc & 1) > 0)
crc = (ushort)((crc >> 1) ^ 0x8408);// 0x8408 = reverse 0x1021
else
crc = (ushort)(crc >> 1);
}
}
byte[] ret = BitConverter.GetBytes((ushort)~crc);
Array.Reverse(ret);
return ret;
}
/// **********************************************************************
/// Name: CRC-16/XMODEM x16+x12+x5+1
/// Poly: 0x1021
/// Init: 0x0000
/// Refin: false
/// Refout: false
/// Xorout: 0x0000
///*************************************************************************
public static byte[] Crc21(byte[] buffer, int start = 0, int len = 0)
{
if (buffer == null || buffer.Length == 0) return null;
if (start < 0) return null;
if (len == 0) len = buffer.Length - start;
int length = start + len;
if (length > buffer.Length) return null;
ushort crc = 0;// Initial value
for (int i = start; i < length; i++)
{
crc ^= (ushort)(buffer[i] << 8);
for (int j = 0; j < 8; j++)
{
if ((crc & 0x8000) > 0)
crc = (ushort)((crc << 1) ^ 0x1021);
else
crc = (ushort)(crc << 1);
}
}
byte[] ret = BitConverter.GetBytes(crc);
Array.Reverse(ret);
return ret;
}
/// **********************************************************************
/// Name: CRC32 x32+x26+x23+x22+x16+x12+x11+x10+x8+x7+x5+x4+x2+x+1
/// Poly: 0x04C11DB7
/// Init: 0xFFFFFFFF
/// Refin: true
/// Refout: true
/// Xorout: 0xFFFFFFFF
///*************************************************************************
public static byte[] Crc22(byte[] buffer, int start = 0, int len = 0)
{
if (buffer == null || buffer.Length == 0) return null;
if (start < 0) return null;
if (len == 0) len = buffer.Length - start;
int length = start + len;
if (length > buffer.Length) return null;
uint crc = 0xFFFFFFFF;// Initial value
for (int i = start; i < length; i++)
{
crc ^= buffer[i];
for (int j = 0; j < 8; j++)
{
if ((crc & 1) > 0)
crc = (crc >> 1) ^ 0xEDB88320;// 0xEDB88320= reverse 0x04C11DB7
else
crc = crc >> 1;
}
}
byte[] ret = BitConverter.GetBytes(~crc);
Array.Reverse(ret);
return ret;
}
/// **********************************************************************
/// Name: CRC32/MPEG-2 x32+x26+x23+x22+x16+x12+x11+x10+x8+x7+x5+x4+x2+x+1
/// Poly: 0x04C11DB7
/// Init: 0xFFFFFFFF
/// Refin: false
/// Refout: false
/// Xorout: 0x00000000
///*************************************************************************
public static byte[] Crc23(byte[] buffer, int start = 0, int len = 0)
{
if (buffer == null || buffer.Length == 0) return null;
if (start < 0) return null;
if (len == 0) len = buffer.Length - start;
int length = start + len;
if (length > buffer.Length) return null;
uint crc = 0xFFFFFFFF;// Initial value
for (int i = start; i < length; i++)
{
crc ^= (uint)(buffer[i] << 24);
for (int j = 0; j < 8; j++)
{
if ((crc & 0x80000000) > 0)
crc = (crc << 1) ^ 0x04C11DB7;
else
crc = crc << 1;
}
}
byte[] ret = BitConverter.GetBytes(crc);
Array.Reverse(ret);
return ret;
}检验和(checksum)，在数据处理和数据通信领域中，用于校验目的地一组数据项的和。它通常是以十六进制为数制表示的形式。如果校验和的数值超过十六进制的FF,也就是255. 就要求其补码作为校验和。通常用来在通信中，尤其是远距离通信中保证数据的完整性和准确性。
public static byte[] allAdd(byte[] buffer, int start = 0, int len = 0)
{
if (buffer == null || buffer.Length == 0) return null;
if (start < 0) return null;
if (len == 0) len = buffer.Length - start;
int length = start + len;
if (length > buffer.Length) return null;
byte bcc = 0;// Initial value
for (int i = start; i < len; i++)
{
bcc ^= buffer[i];
}
return new byte[] { bcc };
}到此这篇关于C#实现的4种常用数据校验方法小结(CRC校验,LRC校验,BCC校验,累加和校验)的文章就介绍到这了,更多相关C# 数据校验内容请搜索脚本之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持脚本之家！
您可能感兴趣的文章:
相关文章
这篇文章主要为大家详细介绍了Unity3D实现相机跟随控制，文中示例代码介绍的非常详细，具有一定的参考价值，感兴趣的小伙伴们可以参考一下2020-07-07
UDP协议是互联网上使用最广泛的传输协议之一,具有简单、高效和不可靠的特点,本文主要介绍了C# UDP网络通信的实现示例,具有一定的参考价值,感兴趣的可以了解一下2024-06-06
本篇文章是对c#中的Equals()与运算符==的区别进行了详细的分析介绍，需要的朋友参考下2013-05-05
本篇文章是对C#多线程中lock关键字的使用进行了详细的分析介绍，需要的朋友参考下2013-06-06
这篇文章主要为大家详细介绍了C# winform自定义翻页控件的方法，具有一定的参考价值，感兴趣的小伙伴们可以参考一下2017-09-09
这篇文章主要介绍了c#中switch case的用法实例解析,对于C#的初学者来说有必要熟练掌握,需要的朋友可以参考下2014-08-08
这篇文章主要为大家详细介绍了unity实现贴图矩阵运算，旋转平移缩放，文中示例代码介绍的非常详细，具有一定的参考价值，感兴趣的小伙伴们可以参考一下2020-07-07
这篇文章主要介绍了基于C#生成随机数的类文件,可作为公共库供其他文件调用,需要的朋友可以参考下2014-07-07
这篇文章介绍了为Xamarin.Forms的导航栏增加搜索功能的方法，文中通过示例代码介绍的非常详细。对大家的学习或工作具有一定的参考借鉴价值，需要的朋友可以参考下2022-01-01
这篇文章主要介绍了C#打开php链接传参然后接收返回值的关键代码，代码简单易懂，非常不错，具有参考借鉴价值，需要的朋友可以参考下2016-08-08
最新评论