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authorConstantin Kaplinsky <const@tightvnc.com>2006-05-25 05:12:25 +0000
committerConstantin Kaplinsky <const@tightvnc.com>2006-05-25 05:12:25 +0000
commit729598cb00d791bbdfe23ebe0023d3a1c3962f83 (patch)
treeffe1b87705a0541998b8d7c44ea75dc4702dc515 /win/rfb_win32/WMShatter.h
parentb30ae7facbdf8273f34f5d67d3d2e9c81db75576 (diff)
downloadtigervnc-729598cb00d791bbdfe23ebe0023d3a1c3962f83.tar.gz
tigervnc-729598cb00d791bbdfe23ebe0023d3a1c3962f83.zip
Migrating to new directory structure adopted from the RealVNC's source tree. More changes will follow.
git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@591 3789f03b-4d11-0410-bbf8-ca57d06f2519
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+/* Copyright (C) 2002-2005 RealVNC Ltd. All Rights Reserved.
+ *
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+ * USA.
+ */
+
+// -=- WMShatter.h
+//
+// WMShatter provides the IsSafeWM routine, which returns true iff the
+// supplied window message is safe to pass to DispatchMessage, or to
+// process in the window procedure.
+//
+// This is only required, of course, to avoid so-called "shatter" attacks
+// to be made against the VNC server, which take advantage of the noddy
+// design of the Win32 window messaging system.
+//
+// The API here is designed to hopefully be future proof, so that if they
+// ever come up with a proper way to determine whether a message is safe
+// or not then it can just be reimplemented here...
+
+#ifndef __RFB_WIN32_SHATTER_H__
+#define __RFB_WIN32_SHATTER_H__
+
+#include <windows.h>
+
+namespace rfb {
+ namespace win32 {
+
+ bool IsSafeWM(HWND window, UINT msg, WPARAM wParam, LPARAM lParam);
+
+ LRESULT SafeDefWindowProc(HWND wnd, UINT msg, WPARAM wParam, LPARAM lParam);
+
+ LRESULT SafeDispatchMessage(const MSG* msg);
+
+ };
+};
+
+#endif // __RFB_WIN32_SHATTER_H__