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https://github.com/kasmtech/KasmVNC.git
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51 lines
1.7 KiB
C
51 lines
1.7 KiB
C
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/* Copyright (C) 2002-2005 RealVNC Ltd. All Rights Reserved.
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*
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* This is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This software is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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* USA.
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*/
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// -=- WMShatter.h
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//
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// WMShatter provides the IsSafeWM routine, which returns true iff the
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// supplied window message is safe to pass to DispatchMessage, or to
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// process in the window procedure.
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//
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// This is only required, of course, to avoid so-called "shatter" attacks
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// to be made against the VNC server, which take advantage of the noddy
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// design of the Win32 window messaging system.
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//
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// The API here is designed to hopefully be future proof, so that if they
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// ever come up with a proper way to determine whether a message is safe
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// or not then it can just be reimplemented here...
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#ifndef __RFB_WIN32_SHATTER_H__
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#define __RFB_WIN32_SHATTER_H__
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#include <windows.h>
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namespace rfb {
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namespace win32 {
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bool IsSafeWM(HWND window, UINT msg, WPARAM wParam, LPARAM lParam);
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LRESULT SafeDefWindowProc(HWND wnd, UINT msg, WPARAM wParam, LPARAM lParam);
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LRESULT SafeDispatchMessage(const MSG* msg);
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};
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};
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#endif // __RFB_WIN32_SHATTER_H__
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