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1 // Windows/MemoryLock.cpp
2 
3 #include "StdAfx.h"
4 
5 #include "MemoryLock.h"
6 
7 namespace NWindows {
8 namespace NSecurity {
9 
10 #ifndef UNDER_CE
11 
12 #ifdef _UNICODE
13 #define MY_FUNC_SELECT(f) :: f
14 #else
15 #define MY_FUNC_SELECT(f) my_ ## f
16 extern "C" {
17 typedef BOOL (WINAPI * Func_OpenProcessToken)(HANDLE ProcessHandle, DWORD DesiredAccess, PHANDLE TokenHandle);
18 typedef BOOL (WINAPI * Func_LookupPrivilegeValue)(LPCTSTR lpSystemName, LPCTSTR lpName, PLUID lpLuid);
19 typedef BOOL (WINAPI * Func_AdjustTokenPrivileges)(HANDLE TokenHandle, BOOL DisableAllPrivileges,
20     PTOKEN_PRIVILEGES NewState, DWORD BufferLength, PTOKEN_PRIVILEGES PreviousState, PDWORD ReturnLength);
21 }
22 #define GET_PROC_ADDR(fff, name) Func_ ## fff  my_ ## fff  = (Func_ ## fff)GetProcAddress(hModule, name)
23 #endif
24 
EnablePrivilege(LPCTSTR privilegeName,bool enable)25 bool EnablePrivilege(LPCTSTR privilegeName, bool enable)
26 {
27   bool res = false;
28 
29   #ifndef _UNICODE
30 
31   HMODULE hModule = ::LoadLibrary(TEXT("Advapi32.dll"));
32   if (hModule == NULL)
33     return false;
34 
35   GET_PROC_ADDR(OpenProcessToken, "OpenProcessToken");
36   GET_PROC_ADDR(LookupPrivilegeValue, "LookupPrivilegeValueA");
37   GET_PROC_ADDR(AdjustTokenPrivileges, "AdjustTokenPrivileges");
38 
39   if (my_OpenProcessToken &&
40       my_AdjustTokenPrivileges &&
41       my_LookupPrivilegeValue)
42 
43   #endif
44 
45   {
46     HANDLE token;
47     if (MY_FUNC_SELECT(OpenProcessToken)(::GetCurrentProcess(), TOKEN_ADJUST_PRIVILEGES, &token))
48     {
49       TOKEN_PRIVILEGES tp;
50       if (MY_FUNC_SELECT(LookupPrivilegeValue)(NULL, privilegeName, &(tp.Privileges[0].Luid)))
51       {
52         tp.PrivilegeCount = 1;
53         tp.Privileges[0].Attributes = (enable ? SE_PRIVILEGE_ENABLED : 0);
54         if (MY_FUNC_SELECT(AdjustTokenPrivileges)(token, FALSE, &tp, 0, NULL, NULL))
55           res = (GetLastError() == ERROR_SUCCESS);
56       }
57       ::CloseHandle(token);
58     }
59   }
60 
61   #ifndef _UNICODE
62 
63   ::FreeLibrary(hModule);
64 
65   #endif
66 
67   return res;
68 }
69 
70 #endif
71 
72 }}
73