天堂2文件校验算法的代码（转别人的）|老数据合并综合服务端发布区 - 梦想仙境中文官方社区论坛

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只看楼主正序阅读使用道具楼主发表于: 2004-06-30

DWORD L2FileCheck(char *file)
{
DWORD Check=0xFFFFFFFF;
HANDLE hFile;
DWORD dwFileSize;
DWORD dwNumberOfBytesReadWritten;
HANDLE hMemory;
LPVOID pMemory;
char filename[MAX_PATH];
BYTE *temp;
BYTE temp1,temp2;
int Max=0,Min=0;
temp =(unsigned char *)malloc(0x1000);
hFile=CreateFile(file, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_ARCHIVE, 0);
if(hFile != INVALID_HANDLE_value)
{
dwFileSize=GetFileSize(hFile, NULL);
hMemory=GlobalAlloc(GMEM_MOVEABLE | GMEM_ZEROINIT, dwFileSize);
pMemory=GlobalLock(hMemory);
Max = (dwFileSize-0x14)/0x1000;
Min = (dwFileSize-0x14)%0x1000;
for(int j=0;j<Max;j++)
{
ReadFile(hFile,pMemory,0x1000,&dwNumberOfBytesReadWritten,NULL);
memcpy(temp,pMemory,0x1000);
for(int k=0;k<0x1000;k++)
{
temp1=*(BYTE *)(temp+k);
temp2=(Check&0x000000FF) ^ temp1;
Check=(Check >> 8) ^ FileCheck[temp2];
}
}
ReadFile(hFile,pMemory,Min,&dwNumberOfBytesReadWritten,NULL);
memcpy(temp,pMemory,0x1000);
for(j=0;j<Min;j++)
{
BYTE temp1,temp2;
temp1=*(BYTE *)(temp+j);
temp2=(Check&0x000000FF) ^ temp1;
Check=(Check >> 8) ^ FileCheck[temp2];
}
_asm {
push ecx
mov ecx,Check
not ecx
mov Check,ecx
pop ecx
}
CloseHandle(hFile);
GlobalUnlock(pMemory);
GlobalFree(hMemory);
free(temp);
return Check;
}
else
{
return 0;
}
}