如何檢測我的進程是否正在運行UAC提升？

Question

我的Vista應用程序需要知道用戶是以「管理員」身份（提升）還是以標準用戶身份（未提升）啓動它。我如何在運行時檢測？

Answer 1

下面的C++函數可以做到這一點：

HRESULT GetElevationType(__out TOKEN_ELEVATION_TYPE * ptet); 

/* 
Parameters: 

ptet 
    [out] Pointer to a variable that receives the elevation type of the current process. 

    The possible values are: 

    TokenElevationTypeDefault - This value indicates that either UAC is disabled, 
     or the process is started by a standard user (not a member of the Administrators group). 

    The following two values can be returned only if both the UAC is enabled 
    and the user is a member of the Administrator's group: 

    TokenElevationTypeFull - the process is running elevated. 

    TokenElevationTypeLimited - the process is not running elevated. 

Return Values: 

    If the function succeeds, the return value is S_OK. 
    If the function fails, the return value is E_FAIL. To get extended error information, call GetLastError(). 

Implementation: 
*/ 

HRESULT GetElevationType(__out TOKEN_ELEVATION_TYPE * ptet) 
{ 
    if (!IsVista()) 
     return E_FAIL; 

    HRESULT hResult = E_FAIL; // assume an error occurred 
    HANDLE hToken = NULL; 

    if (!::OpenProcessToken( 
       ::GetCurrentProcess(), 
       TOKEN_QUERY, 
       &hToken)) 
    { 
     return hResult; 
    } 

    DWORD dwReturnLength = 0; 

    if (::GetTokenInformation(
       hToken, 
       TokenElevationType, 
       ptet, 
       sizeof(*ptet), 
       &dwReturnLength)) 
    { 
      ASSERT(dwReturnLength == sizeof(*ptet)); 
      hResult = S_OK; 
    } 

    ::CloseHandle(hToken); 

    return hResult; 
} 

Answer 2

對於我們這些工作在C＃，在Windows SDK有一個「UACDemo」應用爲「跨技術示例」的一部分。他們發現，如果當前用戶是使用此方法管理員：

private bool IsAdministrator 
{ 
    get 
    { 
     WindowsIdentity wi = WindowsIdentity.GetCurrent(); 
     WindowsPrincipal wp = new WindowsPrincipal(wi); 

     return wp.IsInRole(WindowsBuiltInRole.Administrator); 
    } 
} 

（注：我重構原始代碼是一個屬性，而不是一個「如果」語句）

Answer 3

我不認爲擡高類型是你想要的答案。你只是想知道它是否升高。當您調用GetTokenInformation時，請使用TokenElevation而不是TokenElevationType。如果結構返回正值，則用戶是admin。如果爲零，則用戶爲正常高程。

這裏是一個Delphi的解決方案：

function TMyAppInfo.RunningAsAdmin: boolean; 
var 
    hToken, hProcess: THandle; 
    pTokenInformation: pointer; 
    ReturnLength: DWord; 
    TokenInformation: TTokenElevation; 
begin 
    hProcess := GetCurrentProcess; 
    try 
    if OpenProcessToken(hProcess, TOKEN_QUERY, hToken) then try 
     TokenInformation.TokenIsElevated := 0; 
     pTokenInformation := @TokenInformation; 
     GetTokenInformation(hToken, TokenElevation, pTokenInformation, sizeof(TokenInformation), ReturnLength); 
     result := (TokenInformation.TokenIsElevated > 0); 
    finally 
     CloseHandle(hToken); 
    end; 
    except 
    result := false; 
    end; 
end; 

Answer 4

這裏是一個VB6實施檢查的，如果（當前）工藝升高

Option Explicit 

'--- for OpenProcessToken 
Private Const TOKEN_QUERY     As Long = &H8 
Private Const TokenElevation    As Long = 20 

Private Declare Function GetCurrentProcess Lib "kernel32"() As Long 
Private Declare Function OpenProcessToken Lib "advapi32.dll" (ByVal ProcessHandle As Long, ByVal DesiredAccess As Long, TokenHandle As Long) As Long 
Private Declare Function GetTokenInformation Lib "advapi32.dll" (ByVal TokenHandle As Long, ByVal TokenInformationClass As Long, TokenInformation As Any, ByVal TokenInformationLength As Long, ReturnLength As Long) As Long 
Private Declare Function CloseHandle Lib "kernel32" (ByVal hObject As Long) As Long 


Public Function IsElevated(Optional ByVal hProcess As Long) As Boolean 
    Dim hToken   As Long 
    Dim dwIsElevated As Long 
    Dim dwLength  As Long 

    If hProcess = 0 Then 
     hProcess = GetCurrentProcess() 
    End If 
    If OpenProcessToken(hProcess, TOKEN_QUERY, hToken) Then 
     If GetTokenInformation(hToken, TokenElevation, dwIsElevated, 4, dwLength) Then 
      IsElevated = (dwIsElevated <> 0) 
     End If 
     Call CloseHandle(hToken) 
    End If 
End Function