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73 lines
2.3 KiB
C++
73 lines
2.3 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
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#include "WinTokenUtils.h"
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#include "nsWindowsHelpers.h"
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using namespace mozilla;
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// If |aToken| is nullptr, CheckTokenMembership uses the calling thread's
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// primary token to check membership for.
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static LauncherResult<bool> IsMemberOfAdministrators(
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const nsAutoHandle& aToken) {
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BYTE adminsGroupSid[SECURITY_MAX_SID_SIZE];
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DWORD adminsGroupSidSize = sizeof(adminsGroupSid);
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if (!CreateWellKnownSid(WinBuiltinAdministratorsSid, nullptr, adminsGroupSid,
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&adminsGroupSidSize)) {
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return LAUNCHER_ERROR_FROM_LAST();
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}
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BOOL isMember;
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if (!CheckTokenMembership(aToken, adminsGroupSid, &isMember)) {
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return LAUNCHER_ERROR_FROM_LAST();
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}
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return !!isMember;
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}
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static LauncherResult<bool> IsUacEnabled() {
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DWORD len = sizeof(DWORD);
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DWORD value;
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LSTATUS status = RegGetValueW(
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HKEY_LOCAL_MACHINE,
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L"SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\System",
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L"EnableLUA", RRF_RT_DWORD, nullptr, &value, &len);
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if (status != ERROR_SUCCESS) {
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return LAUNCHER_ERROR_FROM_WIN32(status);
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}
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// UAC is disabled only when EnableLUA is 0.
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return (value != 0);
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}
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namespace mozilla {
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LauncherResult<bool> IsAdminWithoutUac() {
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// To check whether the process was launched with Administrator priviledges
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// or not, we cannot simply check the integrity level of the current process
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// because the launcher process spawns the browser process with the medium
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// integrity level even though the launcher process is high integrity level.
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// We check whether the thread's token contains Administratos SID or not
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// instead.
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LauncherResult<bool> containsAdminGroup =
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IsMemberOfAdministrators(nsAutoHandle());
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if (containsAdminGroup.isErr()) {
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return containsAdminGroup.propagateErr();
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}
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if (!containsAdminGroup.unwrap()) {
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return false;
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}
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LauncherResult<bool> isUacEnabled = IsUacEnabled();
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if (isUacEnabled.isErr()) {
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return isUacEnabled.propagateErr();
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}
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return !isUacEnabled.unwrap();
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}
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} // namespace mozilla
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