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cc3b5289ef
This removes the code introduced in [#4399](https://github.com/bitcoin/bitcoin/pull/4399) that attempts to add additional entroy to the OpenSSL PRNG using Windows messages. Note that this is specific to bitcoin-qt running on Windows. ``` RAND_event() collects the entropy from Windows events such as mouse movements and other user interaction. It should be called with the iMsg, wParam and lParam arguments of all messages sent to the window procedure. It will estimate the entropy contained in the event message (if any), and add it to the PRNG. The program can then process the messages as usual. ``` Besides BIP70, this is the last place we are directly using OpenSSL in the GUI code. All other OpenSSL usage is in random.cpp. Note that we are still also doing Windows specific entropy gathering in multiple other places. Such as [RandAddSeedPerfmon](https://github.com/bitcoin/bitcoin/blob/master/src/random.cpp#L268) and [RAND_screen()](https://github.com/bitcoin/bitcoin/blob/master/src/random.cpp#L600). Also note that if RAND_event returns 0 (PRNG has NOT been seeded with enough data), we're just logging a message and continuing on, which seems less than ideal.
58 lines
1.9 KiB
C++
58 lines
1.9 KiB
C++
// Copyright (c) 2014-2018 The Bitcoin Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#include <qt/winshutdownmonitor.h>
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#if defined(Q_OS_WIN)
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#include <shutdown.h>
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#include <windows.h>
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#include <QDebug>
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// If we don't want a message to be processed by Qt, return true and set result to
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// the value that the window procedure should return. Otherwise return false.
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bool WinShutdownMonitor::nativeEventFilter(const QByteArray &eventType, void *pMessage, long *pnResult)
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{
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Q_UNUSED(eventType);
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MSG *pMsg = static_cast<MSG *>(pMessage);
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switch(pMsg->message)
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{
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case WM_QUERYENDSESSION:
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{
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// Initiate a client shutdown after receiving a WM_QUERYENDSESSION and block
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// Windows session end until we have finished client shutdown.
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StartShutdown();
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*pnResult = FALSE;
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return true;
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}
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case WM_ENDSESSION:
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{
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*pnResult = FALSE;
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return true;
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}
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}
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return false;
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}
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void WinShutdownMonitor::registerShutdownBlockReason(const QString& strReason, const HWND& mainWinId)
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{
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typedef BOOL (WINAPI *PSHUTDOWNBRCREATE)(HWND, LPCWSTR);
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PSHUTDOWNBRCREATE shutdownBRCreate = (PSHUTDOWNBRCREATE)GetProcAddress(GetModuleHandleA("User32.dll"), "ShutdownBlockReasonCreate");
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if (shutdownBRCreate == nullptr) {
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qWarning() << "registerShutdownBlockReason: GetProcAddress for ShutdownBlockReasonCreate failed";
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return;
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}
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if (shutdownBRCreate(mainWinId, strReason.toStdWString().c_str()))
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qInfo() << "registerShutdownBlockReason: Successfully registered: " + strReason;
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else
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qWarning() << "registerShutdownBlockReason: Failed to register: " + strReason;
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}
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#endif
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