How can I detect if my process is running UAC-elevated or not?
我的Vista应用程序需要知道用户是"以管理员身份"(提升)还是以标准用户(非提升)启动它的。 如何在运行时检测到？
对于使用C＃的我们来说，在Windows SDK中，有一个" UACDemo"应用程序作为"跨技术示例"的一部分。 他们使用以下方法查找当前用户是否是管理员：
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| private bool IsAdministrator
{
get
{
WindowsIdentity wi = WindowsIdentity.GetCurrent();
WindowsPrincipal wp = new WindowsPrincipal(wi);
return wp.IsInRole(WindowsBuiltInRole.Administrator);
}
} |
(注意：我将原始代码重构为属性，而不是" if"语句)
以下C ++函数可以做到这一点：
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| 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;
} |
我认为海拔类型不是您想要的答案。 您只想知道它是否升高。 调用GetTokenInformation时，请使用TokenElevation而不是TokenElevationType。 如果结构返回正值，则用户为admin。 如果为零，则用户为正常高程。
这是一个Delphi解决方案：
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| 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; |
这是检查(当前)进程是否提高的VB6实现
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| 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" (ByVal ProcessHandle As Long, ByVal DesiredAccess As Long, TokenHandle As Long) As Long
Private Declare Function GetTokenInformation Lib"advapi32" (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) <> 0 Then
If GetTokenInformation(hToken, TokenElevation, dwIsElevated, 4, dwLength) <> 0 Then
IsElevated = (dwIsElevated <> 0)
End If
Call CloseHandle(hToken)
End If
End Function |
|
