验证微软数字签名

BOOL CheckFileTrust( LPCWSTR lpFileName )
{
BOOL bRet = FALSE;
WINTRUST_DATA wd = { 0 };
WINTRUST_FILE_INFO wfi = { 0 };
WINTRUST_CATALOG_INFO wci = { 0 };
CATALOG_INFO ci = { 0 };

HCATADMIN hCatAdmin = NULL;
if ( !CryptCATAdminAcquireContext( &hCatAdmin, NULL, 0 ) )
{
return FALSE;
}

HANDLE hFile = CreateFileW( lpFileName, GENERIC_READ, FILE_SHARE_READ,
NULL, OPEN_EXISTING, 0, NULL );
if ( INVALID_HANDLE_VALUE == hFile )
{
CryptCATAdminReleaseContext( hCatAdmin, 0 );
return FALSE;
}

DWORD dwCnt = 100;
BYTE byHash[100];
CryptCATAdminCalcHashFromFileHandle( hFile, &dwCnt, byHash, 0 );
CloseHandle( hFile );

LPWSTR pszMemberTag = new WCHAR[dwCnt * 2 + 1];
for ( DWORD dw = 0; dw < dwCnt; ++dw )
{
wsprintfW( &pszMemberTag[dw * 2], L"%02X", byHash[dw] );
}

HCATINFO hCatInfo = CryptCATAdminEnumCatalogFromHash( hCatAdmin,
byHash, dwCnt, 0, NULL );
if ( NULL == hCatInfo )
{
wfi.cbStruct       = sizeof( WINTRUST_FILE_INFO );
wfi.pcwszFilePath  = lpFileName;
wfi.hFile          = NULL;
wfi.pgKnownSubject = NULL;

wd.cbStruct            = sizeof( WINTRUST_DATA );
wd.dwUnionChoice       = WTD_CHOICE_FILE;
wd.pFile               = &wfi;
wd.dwUIChoice          = WTD_UI_NONE;
wd.fdwRevocationChecks = WTD_REVOKE_NONE;
wd.dwStateAction       = WTD_STATEACTION_IGNORE;
wd.dwProvFlags         = WTD_SAFER_FLAG;
wd.hWVTStateData       = NULL;
wd.pwszURLReference    = NULL;
}
else
{
CryptCATCatalogInfoFromContext( hCatInfo, &ci, 0 );
wci.cbStruct             = sizeof( WINTRUST_CATALOG_INFO );
wci.pcwszCatalogFilePath = ci.wszCatalogFile;
wci.pcwszMemberFilePath  = lpFileName;
wci.pcwszMemberTag       = pszMemberTag;

wd.cbStruct            = sizeof( WINTRUST_DATA );
wd.dwUnionChoice       = WTD_CHOICE_CATALOG;
wd.pCatalog            = &wci;
wd.dwUIChoice          = WTD_UI_NONE;
wd.fdwRevocationChecks = WTD_STATEACTION_VERIFY;
wd.dwProvFlags         = 0;
wd.hWVTStateData       = NULL;
wd.pwszURLReference    = NULL;
}
GUID action = WINTRUST_ACTION_GENERIC_VERIFY_V2;
HRESULT hr  = WinVerifyTrust( NULL, &action, &wd );
bRet        = SUCCEEDED( hr );

if ( NULL != hCatInfo )
{
CryptCATAdminReleaseCatalogContext( hCatAdmin, hCatInfo, 0 );
}
CryptCATAdminReleaseContext( hCatAdmin, 0 ); // 2007.4.10感谢童志明君指出一处内存泄漏
delete[] pszMemberTag;
return bRet;
}