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