Method fakeCtrlAltDel

src/lib/platform/MSWindowsKeyState.cpp:765–789

We must use SendSAS (Secure Attention Sequence) to simulate Ctrl+Alt+Del (since Windows Vista). According to the MS docs: > To successfully call the SendSAS function, an application must either be running as a > service or have the uiAccess attribute of the requestedExecutionLevel element set to "true" > in its application manifest. Since the daemon is running as a service, we can use it to send

// as a backup but this ability was removed by Microsoft for security in favor of requiring the
// `SendSAS` event to be used, which makes DoS and social engineering attacks more difficult.
bool MSWindowsKeyState::fakeCtrlAltDel()
{
  // The daemon creates this event with default permissions, which means this process must be
  // elevated to be able to open it. If not elevated, an access denied error will be returned.
  MSWindowsHandle sendSasEvent(OpenEvent(EVENT_MODIFY_STATE, FALSE, LPCWSTR(kSendSasEventName)));
  if (!sendSasEvent.get()) {
    LOG_ERR(
        "couldn't open SAS event, unable to simulate ctrl+alt+del, error: %s",
        windowsErrorToString(GetLastError()).c_str()
    );
    return false;
  }

  // Note: We don't directly call SendSAS, but rather we tell the daemon to do it by setting the event.
  LOG_DEBUG("setting SAS event to simulate ctrl+alt+del");
  if (!SetEvent(sendSasEvent.get())) {
    LOG_ERR(
        "failed to set SAS event, unable to simulate ctrl+alt+del, error: %s",
        windowsErrorToString(GetLastError()).c_str()
    );
    return false;
  }

  return true;
}

KeyModifierMask MSWindowsKeyState::pollActiveModifiers() const
{