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// Windows/MemoryLock.cpp
#include "StdAfx.h"
#include "../../C/CpuArch.h"
#include "MemoryLock.h"
namespace NWindows {
namespace NSecurity {
#ifndef UNDER_CE
#ifdef _UNICODE
#define MY_FUNC_SELECT(f) :: f
#else
#define MY_FUNC_SELECT(f) my_ ## f
extern "C" {
typedef BOOL (WINAPI * Func_OpenProcessToken)(HANDLE ProcessHandle, DWORD DesiredAccess, PHANDLE TokenHandle);
typedef BOOL (WINAPI * Func_LookupPrivilegeValue)(LPCTSTR lpSystemName, LPCTSTR lpName, PLUID lpLuid);
typedef BOOL (WINAPI * Func_AdjustTokenPrivileges)(HANDLE TokenHandle, BOOL DisableAllPrivileges,
PTOKEN_PRIVILEGES NewState, DWORD BufferLength, PTOKEN_PRIVILEGES PreviousState, PDWORD ReturnLength);
}
#define GET_PROC_ADDR(fff, name) \
const Func_ ## fff my_ ## fff = Z7_GET_PROC_ADDRESS( \
Func_ ## fff, hModule, name);
#endif
bool EnablePrivilege(LPCTSTR privilegeName, bool enable)
{
bool res = false;
#ifndef _UNICODE
const HMODULE hModule = ::LoadLibrary(TEXT("advapi32.dll"));
if (!hModule)
return false;
GET_PROC_ADDR(
OpenProcessToken,
"OpenProcessToken")
GET_PROC_ADDR(
LookupPrivilegeValue,
"LookupPrivilegeValueA")
GET_PROC_ADDR(
AdjustTokenPrivileges,
"AdjustTokenPrivileges")
if (my_OpenProcessToken &&
my_AdjustTokenPrivileges &&
my_LookupPrivilegeValue)
#endif
{
HANDLE token;
if (MY_FUNC_SELECT(OpenProcessToken)(::GetCurrentProcess(), TOKEN_ADJUST_PRIVILEGES, &token))
{
TOKEN_PRIVILEGES tp;
if (MY_FUNC_SELECT(LookupPrivilegeValue)(NULL, privilegeName, &(tp.Privileges[0].Luid)))
{
tp.PrivilegeCount = 1;
tp.Privileges[0].Attributes = (enable ? SE_PRIVILEGE_ENABLED : 0);
if (MY_FUNC_SELECT(AdjustTokenPrivileges)(token, FALSE, &tp, 0, NULL, NULL))
res = (GetLastError() == ERROR_SUCCESS);
}
::CloseHandle(token);
}
}
#ifndef _UNICODE
::FreeLibrary(hModule);
#endif
return res;
}
typedef void (WINAPI * Func_RtlGetVersion) (OSVERSIONINFOEXW *);
/*
We suppose that Window 10 works incorrectly with "Large Pages" at:
- Windows 10 1703 (15063) : incorrect allocating after VirtualFree()
- Windows 10 1709 (16299) : incorrect allocating after VirtualFree()
- Windows 10 1809 (17763) : the failures for blocks of 1 GiB and larger,
if CPU doesn't support 1 GB pages.
Windows 10 1903 (18362) probably works correctly.
*/
unsigned Get_LargePages_RiskLevel()
{
OSVERSIONINFOEXW vi;
const HMODULE ntdll = ::GetModuleHandleW(L"ntdll.dll");
if (!ntdll)
return 0;
const
Func_RtlGetVersion func = Z7_GET_PROC_ADDRESS(
Func_RtlGetVersion, ntdll,
"RtlGetVersion");
if (!func)
return 0;
func(&vi);
if (vi.dwPlatformId != VER_PLATFORM_WIN32_NT)
return 0;
if (vi.dwMajorVersion + vi.dwMinorVersion != 10)
return 0;
if (vi.dwBuildNumber <= 16299)
return 1;
#ifdef MY_CPU_X86_OR_AMD64
if (vi.dwBuildNumber < 18362 && !CPU_IsSupported_PageGB())
return 1;
#endif
return 0;
}
#endif
}}
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