CRC较验的算法？？？

Question

有多种CRC，生成多项式是什么？

Answer 1

UCHAR  _cdecl CComm::CRC_8(UCHAR* strBuf,DWORD& dwLengthToBeCalculate)
{
UCHAR bCRC;
if(dwLengthToBeCalculate==0) return 0;
__asm
{
pushf;
mov edx,strBuf;
mov ebx,dwLengthToBeCalculate;
mov ebx,[ebx];
mov ah,[edx];
dec ebx;
jz crc4
crc1: inc edx;
mov al,[edx];
mov ecx,8;
crc2: shl ax,1;
jnc crc3;
xor ah,7;
crc3: loopnz crc2;
dec ebx;
jnz crc1;
crc4: mov al,0;
mov ecx,8;
crc5: shl ax,1;
jnc crc6;
xor ah,7;
crc6: loopnz crc5;
mov bCRC,ah;
popf;
}
return bCRC;
}

Answer 2

CRC?我用过的是把所有的BYTE异或得到