Differential D6156 Diff 20343 src/qt/winshutdownmonitor.cpp

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src/qt/winshutdownmonitor.cpp

	// Copyright (c) 2014-2016 The Bitcoin Core developers			// Copyright (c) 2014-2016 The Bitcoin Core developers
	// Distributed under the MIT software license, see the accompanying			// Distributed under the MIT software license, see the accompanying
	// file COPYING or http://www.opensource.org/licenses/mit-license.php.			// file COPYING or http://www.opensource.org/licenses/mit-license.php.

	#include <qt/winshutdownmonitor.h>			#include <qt/winshutdownmonitor.h>

	#if defined(Q_OS_WIN)			#if defined(Q_OS_WIN)
	#include <shutdown.h>			#include <shutdown.h>
	#include <util/system.h>

	#include <openssl/rand.h>

	#include <QDebug>			#include <QDebug>

	#include <windows.h>			#include <windows.h>

	// If we don't want a message to be processed by Qt, return true and set result			// If we don't want a message to be processed by Qt, return true and set result
	// to the value that the window procedure should return. Otherwise return false.			// to the value that the window procedure should return. Otherwise return false.
	bool WinShutdownMonitor::nativeEventFilter(const QByteArray &eventType,			bool WinShutdownMonitor::nativeEventFilter(const QByteArray &eventType,
	void pMessage, long pnResult) {			void pMessage, long pnResult) {
	Q_UNUSED(eventType);			Q_UNUSED(eventType);

	MSG pMsg = static_cast<MSG >(pMessage);			MSG pMsg = static_cast<MSG >(pMessage);

	// Seed OpenSSL PRNG with Windows event data (e.g. mouse movements and
	// other user interactions)
	if (RAND_event(pMsg->message, pMsg->wParam, pMsg->lParam) == 0) {
	// Warn only once as this is performance-critical
	static bool warned = false;
	if (!warned) {
	LogPrintf("%s: OpenSSL RAND_event() failed to seed OpenSSL PRNG "
	"with enough data.\n",
	__func__);
	warned = true;
	}
	}

	switch (pMsg->message) {			switch (pMsg->message) {
	case WM_QUERYENDSESSION: {			case WM_QUERYENDSESSION: {
	// Initiate a client shutdown after receiving a WM_QUERYENDSESSION			// Initiate a client shutdown after receiving a WM_QUERYENDSESSION
	// and block			// and block
	// Windows session end until we have finished client shutdown.			// Windows session end until we have finished client shutdown.
	StartShutdown();			StartShutdown();
	*pnResult = FALSE;			*pnResult = FALSE;
	return true;			return true;
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