44 lines
922 B
C++
44 lines
922 B
C++
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//=======================================================================
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//
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// Copyright (c) 1999 Microsoft Corporation. All Rights Reserved.
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//
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// File: filecrc.h
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//
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// Purpose: Calculating and using CRC for files
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//
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//=======================================================================
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#include <windows.h>
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#include <objbase.h>
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#include <filecrc.h>
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#include <wincrypt.h>
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#include <mscat.h>
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HRESULT CalculateFileCRC(LPCTSTR pszFN, WUCRC_HASH* pCRC)
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{
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HANDLE hFile;
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HRESULT hr = S_OK;
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DWORD cbHash = WUCRC_HASH_SIZE;
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hFile = CreateFile(pszFN, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
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if (hFile != INVALID_HANDLE_VALUE)
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{
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if (!CryptCATAdminCalcHashFromFileHandle(hFile, &cbHash, pCRC->HashBytes, 0))
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{
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hr = HRESULT_FROM_WIN32(GetLastError());
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}
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CloseHandle(hFile);
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}
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else
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{
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hr = HRESULT_FROM_WIN32(GetLastError());
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}
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return hr;
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}
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