why ImpersonateLogonUser fails ?

From: Polaris (etpolaris_at_hotmail.com)
Date: 03/25/05

  • Next message: ITA: "RE: EFS from Smart card" 
    Date: Fri, 25 Mar 2005 00:18:01 -0800

    Hi:
    I'm testing a service on XP; within the service, I'd like to get the name of
    the currently logged on user. So I choose to use the Impersonate APIs
    below:

    ----------------------------------------------------------------
    HANDLE hProc = GetCurrentProcess ();

    HANDLE hToken = NULL;
    OpenProcessToken (hProc, TOKEN_IMPERSONATE|TOKEN_QUERY, &hToken);

    ImpersonateLoggedOnUser (hToken);

     wchar_t login [MAX_PATH];
     DWORD len = MAX_PATH;

    GetUserName (login, (PULONG)&len);

    --------------------------------------------------------------

    To make the code above simple to read, I did not copy the error checking
    here. The code above fails at ImpersonateLoggedOnUser and GetLastError is 5
    (Access is Denied).

    Any thought is welcome!

    Thanks in Advance.

    Polaris

  • Next message: ITA: "RE: EFS from Smart card"