<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>sslclient.cpp Example File | Qt Network 5.12.2</title> <link rel="stylesheet" type="text/css" href="style/offline-simple.css" /> <script type="text/javascript"> document.getElementsByTagName("link").item(0).setAttribute("href", "style/offline.css"); // loading style sheet breaks anchors that were jumped to before // so force jumping to anchor again setTimeout(function() { var anchor = location.hash; // need to jump to different anchor first (e.g. none) location.hash = "#"; setTimeout(function() { location.hash = anchor; }, 0); }, 0); </script> </head> <body> <div class="header" id="qtdocheader"> <div class="main"> <div class="main-rounded"> <div class="navigationbar"> <table><tr> <td >Qt 5.12</td><td ><a href="qtnetwork-index.html">Qt Network</a></td><td ><a href="qtnetwork-securesocketclient-example.html">Secure Socket Client Example</a></td><td >sslclient.cpp Example File</td></tr></table><table class="buildversion"><tr> <td id="buildversion" width="100%" align="right"><a href="qtnetwork-index.html">Qt 5.12.2 Reference Documentation</a></td> </tr></table> </div> </div> <div class="content"> <div class="line"> <div class="content mainContent"> <div class="sidebar"><div class="sidebar-content" id="sidebar-content"></div></div> <h1 class="title">sslclient.cpp Example File</h1> <span class="subtitle">securesocketclient/sslclient.cpp</span> <!-- $$$securesocketclient/sslclient.cpp-description --> <div class="descr"> <a name="details"></a> <pre class="cpp"> <span class="comment">/**************************************************************************** ** ** Copyright (C) 2017 The Qt Company Ltd. ** Contact: https://www.qt.io/licensing/ ** ** This file is part of the examples of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:BSD$ ** Commercial License Usage ** Licensees holding valid commercial Qt licenses may use this file in ** accordance with the commercial license agreement provided with the ** Software or, alternatively, in accordance with the terms contained in ** a written agreement between you and The Qt Company. For licensing terms ** and conditions see https://www.qt.io/terms-conditions. For further ** information use the contact form at https://www.qt.io/contact-us. ** ** BSD License Usage ** Alternatively, you may use this file under the terms of the BSD license ** as follows: ** ** "Redistribution and use in source and binary forms, with or without ** modification, are permitted provided that the following conditions are ** met: ** * Redistributions of source code must retain the above copyright ** notice, this list of conditions and the following disclaimer. ** * Redistributions in binary form must reproduce the above copyright ** notice, this list of conditions and the following disclaimer in ** the documentation and/or other materials provided with the ** distribution. ** * Neither the name of The Qt Company Ltd nor the names of its ** contributors may be used to endorse or promote products derived ** from this software without specific prior written permission. ** ** ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." ** ** $QT_END_LICENSE$ ** ****************************************************************************/</span> <span class="preprocessor">#include "certificateinfo.h"</span> <span class="preprocessor">#include "sslclient.h"</span> <span class="preprocessor">#include "ui_sslclient.h"</span> <span class="preprocessor">#include "ui_sslerrors.h"</span> <span class="preprocessor">#include <QtCore></span> SslClient<span class="operator">::</span>SslClient(<span class="type">QWidget</span> <span class="operator">*</span>parent) : <span class="type">QWidget</span>(parent) { setupUi(); setupSecureSocket(); } SslClient<span class="operator">::</span><span class="operator">~</span>SslClient() { <span class="keyword">delete</span> form; } <span class="type">void</span> SslClient<span class="operator">::</span>updateEnabledState() { <span class="keyword">const</span> bool unconnected <span class="operator">=</span> socket<span class="operator">-</span><span class="operator">></span>state() <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qabstractsocket.html">QAbstractSocket</a></span><span class="operator">::</span>UnconnectedState; form<span class="operator">-</span><span class="operator">></span>hostNameEdit<span class="operator">-</span><span class="operator">></span>setReadOnly(<span class="operator">!</span>unconnected); form<span class="operator">-</span><span class="operator">></span>hostNameEdit<span class="operator">-</span><span class="operator">></span>setFocusPolicy(unconnected <span class="operator">?</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>StrongFocus : <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>NoFocus); form<span class="operator">-</span><span class="operator">></span>hostNameLabel<span class="operator">-</span><span class="operator">></span>setEnabled(unconnected); form<span class="operator">-</span><span class="operator">></span>portBox<span class="operator">-</span><span class="operator">></span>setEnabled(unconnected); form<span class="operator">-</span><span class="operator">></span>portLabel<span class="operator">-</span><span class="operator">></span>setEnabled(unconnected); form<span class="operator">-</span><span class="operator">></span>connectButton<span class="operator">-</span><span class="operator">></span>setEnabled(unconnected <span class="operator">&</span><span class="operator">&</span> <span class="operator">!</span>form<span class="operator">-</span><span class="operator">></span>hostNameEdit<span class="operator">-</span><span class="operator">></span>text()<span class="operator">.</span>isEmpty()); <span class="keyword">const</span> bool connected <span class="operator">=</span> socket<span class="operator">-</span><span class="operator">></span>state() <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qabstractsocket.html">QAbstractSocket</a></span><span class="operator">::</span>ConnectedState; form<span class="operator">-</span><span class="operator">></span>sessionOutput<span class="operator">-</span><span class="operator">></span>setEnabled(connected); form<span class="operator">-</span><span class="operator">></span>sessionInput<span class="operator">-</span><span class="operator">></span>setEnabled(connected); form<span class="operator">-</span><span class="operator">></span>sessionInputLabel<span class="operator">-</span><span class="operator">></span>setEnabled(connected); form<span class="operator">-</span><span class="operator">></span>sendButton<span class="operator">-</span><span class="operator">></span>setEnabled(connected); } <span class="type">void</span> SslClient<span class="operator">::</span>secureConnect() { socket<span class="operator">-</span><span class="operator">></span>connectToHostEncrypted(form<span class="operator">-</span><span class="operator">></span>hostNameEdit<span class="operator">-</span><span class="operator">></span>text()<span class="operator">,</span> form<span class="operator">-</span><span class="operator">></span>portBox<span class="operator">-</span><span class="operator">></span>value()); updateEnabledState(); } <span class="type">void</span> SslClient<span class="operator">::</span>socketStateChanged(<span class="type"><a href="qabstractsocket.html">QAbstractSocket</a></span><span class="operator">::</span>SocketState state) { <span class="keyword">if</span> (executingDialog) <span class="keyword">return</span>; updateEnabledState(); <span class="keyword">if</span> (state <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qabstractsocket.html">QAbstractSocket</a></span><span class="operator">::</span>UnconnectedState) { form<span class="operator">-</span><span class="operator">></span>sessionInput<span class="operator">-</span><span class="operator">></span>clear(); form<span class="operator">-</span><span class="operator">></span>hostNameEdit<span class="operator">-</span><span class="operator">></span>setPalette(<span class="type"><a href="../qtgui/qpalette.html">QPalette</a></span>()); form<span class="operator">-</span><span class="operator">></span>hostNameEdit<span class="operator">-</span><span class="operator">></span>setFocus(); form<span class="operator">-</span><span class="operator">></span>cipherLabel<span class="operator">-</span><span class="operator">></span>setText(tr(<span class="string">"<none>"</span>)); padLock<span class="operator">-</span><span class="operator">></span>hide(); } } <span class="type">void</span> SslClient<span class="operator">::</span>socketEncrypted() { form<span class="operator">-</span><span class="operator">></span>sessionOutput<span class="operator">-</span><span class="operator">></span>clear(); form<span class="operator">-</span><span class="operator">></span>sessionInput<span class="operator">-</span><span class="operator">></span>setFocus(); <span class="type"><a href="../qtgui/qpalette.html">QPalette</a></span> palette; palette<span class="operator">.</span>setColor(<span class="type"><a href="../qtgui/qpalette.html">QPalette</a></span><span class="operator">::</span>Base<span class="operator">,</span> <span class="type"><a href="../qtgui/qcolor.html">QColor</a></span>(<span class="number">255</span><span class="operator">,</span> <span class="number">255</span><span class="operator">,</span> <span class="number">192</span>)); form<span class="operator">-</span><span class="operator">></span>hostNameEdit<span class="operator">-</span><span class="operator">></span>setPalette(palette); <span class="keyword">const</span> <span class="type"><a href="qsslcipher.html">QSslCipher</a></span> cipher <span class="operator">=</span> socket<span class="operator">-</span><span class="operator">></span>sessionCipher(); <span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> cipherInfo <span class="operator">=</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span>(<span class="string">"%1, %2 (%3/%4)"</span>)<span class="operator">.</span>arg(cipher<span class="operator">.</span>authenticationMethod()) <span class="operator">.</span>arg(cipher<span class="operator">.</span>name())<span class="operator">.</span>arg(cipher<span class="operator">.</span>usedBits()) <span class="operator">.</span>arg(cipher<span class="operator">.</span>supportedBits());; form<span class="operator">-</span><span class="operator">></span>cipherLabel<span class="operator">-</span><span class="operator">></span>setText(cipherInfo); padLock<span class="operator">-</span><span class="operator">></span>show(); } <span class="type">void</span> SslClient<span class="operator">::</span>socketReadyRead() { appendString(<span class="type"><a href="../qtcore/qstring.html">QString</a></span><span class="operator">::</span>fromUtf8(socket<span class="operator">-</span><span class="operator">></span>readAll())); } <span class="type">void</span> SslClient<span class="operator">::</span>sendData() { <span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> input <span class="operator">=</span> form<span class="operator">-</span><span class="operator">></span>sessionInput<span class="operator">-</span><span class="operator">></span>text(); appendString(input <span class="operator">+</span> <span class="char">'\n'</span>); socket<span class="operator">-</span><span class="operator">></span>write(input<span class="operator">.</span>toUtf8() <span class="operator">+</span> <span class="string">"\r\n"</span>); form<span class="operator">-</span><span class="operator">></span>sessionInput<span class="operator">-</span><span class="operator">></span>clear(); } <span class="type">void</span> SslClient<span class="operator">::</span>socketError(<span class="type"><a href="qabstractsocket.html">QAbstractSocket</a></span><span class="operator">::</span>SocketError) { <span class="keyword">if</span> (handlingSocketError) <span class="keyword">return</span>; handlingSocketError <span class="operator">=</span> <span class="keyword">true</span>; <span class="type">QMessageBox</span><span class="operator">::</span>critical(<span class="keyword">this</span><span class="operator">,</span> tr(<span class="string">"Connection error"</span>)<span class="operator">,</span> socket<span class="operator">-</span><span class="operator">></span>errorString()); handlingSocketError <span class="operator">=</span> <span class="keyword">false</span>; } <span class="type">void</span> SslClient<span class="operator">::</span>sslErrors(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qlist.html">QList</a></span><span class="operator"><</span><span class="type"><a href="qsslerror.html">QSslError</a></span><span class="operator">></span> <span class="operator">&</span>errors) { <span class="type">QDialog</span> errorDialog(<span class="keyword">this</span>); Ui_SslErrors ui; ui<span class="operator">.</span>setupUi(<span class="operator">&</span>errorDialog); connect(ui<span class="operator">.</span>certificateChainButton<span class="operator">,</span> <span class="operator">&</span><span class="type">QPushButton</span><span class="operator">::</span>clicked<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>SslClient<span class="operator">::</span>displayCertificateInfo); <span class="keyword">for</span> (<span class="keyword">const</span> <span class="keyword">auto</span> <span class="operator">&</span>error : errors) ui<span class="operator">.</span>sslErrorList<span class="operator">-</span><span class="operator">></span>addItem(error<span class="operator">.</span>errorString()); executingDialog <span class="operator">=</span> <span class="keyword">true</span>; <span class="keyword">if</span> (errorDialog<span class="operator">.</span>exec() <span class="operator">=</span><span class="operator">=</span> <span class="type">QDialog</span><span class="operator">::</span>Accepted) socket<span class="operator">-</span><span class="operator">></span>ignoreSslErrors(); executingDialog <span class="operator">=</span> <span class="keyword">false</span>; <span class="comment">// did the socket state change?</span> <span class="keyword">if</span> (socket<span class="operator">-</span><span class="operator">></span>state() <span class="operator">!</span><span class="operator">=</span> <span class="type"><a href="qabstractsocket.html">QAbstractSocket</a></span><span class="operator">::</span>ConnectedState) socketStateChanged(socket<span class="operator">-</span><span class="operator">></span>state()); } <span class="type">void</span> SslClient<span class="operator">::</span>displayCertificateInfo() { CertificateInfo info; info<span class="operator">.</span>setCertificateChain(socket<span class="operator">-</span><span class="operator">></span>peerCertificateChain()); info<span class="operator">.</span>exec(); } <span class="type">void</span> SslClient<span class="operator">::</span>setupUi() { <span class="keyword">if</span> (form) <span class="keyword">return</span>; form <span class="operator">=</span> <span class="keyword">new</span> Ui_Form; form<span class="operator">-</span><span class="operator">></span>setupUi(<span class="keyword">this</span>); form<span class="operator">-</span><span class="operator">></span>hostNameEdit<span class="operator">-</span><span class="operator">></span>setSelection(<span class="number">0</span><span class="operator">,</span> form<span class="operator">-</span><span class="operator">></span>hostNameEdit<span class="operator">-</span><span class="operator">></span>text()<span class="operator">.</span>size()); form<span class="operator">-</span><span class="operator">></span>sessionOutput<span class="operator">-</span><span class="operator">></span>setHtml(tr(<span class="string">"&lt;not connected&gt;"</span>)); connect(form<span class="operator">-</span><span class="operator">></span>hostNameEdit<span class="operator">,</span> SIGNAL(textChanged(<span class="type"><a href="../qtcore/qstring.html">QString</a></span>))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(updateEnabledState())); connect(form<span class="operator">-</span><span class="operator">></span>connectButton<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(secureConnect())); connect(form<span class="operator">-</span><span class="operator">></span>sendButton<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(sendData())); padLock <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QToolButton</span>; padLock<span class="operator">-</span><span class="operator">></span>setIcon(<span class="type"><a href="../qtgui/qicon.html">QIcon</a></span>(<span class="string">":/encrypted.png"</span>)); connect(padLock<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(displayCertificateInfo())); <span class="preprocessor">#if QT_CONFIG(cursor)</span> padLock<span class="operator">-</span><span class="operator">></span>setCursor(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>ArrowCursor); <span class="preprocessor">#endif</span> padLock<span class="operator">-</span><span class="operator">></span>setToolTip(tr(<span class="string">"Display encryption details."</span>)); <span class="keyword">const</span> <span class="type">int</span> extent <span class="operator">=</span> form<span class="operator">-</span><span class="operator">></span>hostNameEdit<span class="operator">-</span><span class="operator">></span>height() <span class="operator">-</span> <span class="number">2</span>; padLock<span class="operator">-</span><span class="operator">></span>resize(extent<span class="operator">,</span> extent); padLock<span class="operator">-</span><span class="operator">></span>setSizePolicy(<span class="type">QSizePolicy</span><span class="operator">::</span>Fixed<span class="operator">,</span> <span class="type">QSizePolicy</span><span class="operator">::</span>Ignored); <span class="type">QHBoxLayout</span> <span class="operator">*</span>layout <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QHBoxLayout</span>(form<span class="operator">-</span><span class="operator">></span>hostNameEdit); layout<span class="operator">-</span><span class="operator">></span>setMargin(form<span class="operator">-</span><span class="operator">></span>hostNameEdit<span class="operator">-</span><span class="operator">></span>style()<span class="operator">-</span><span class="operator">></span>pixelMetric(<span class="type">QStyle</span><span class="operator">::</span>PM_DefaultFrameWidth)); layout<span class="operator">-</span><span class="operator">></span>setSpacing(<span class="number">0</span>); layout<span class="operator">-</span><span class="operator">></span>addStretch(); layout<span class="operator">-</span><span class="operator">></span>addWidget(padLock); form<span class="operator">-</span><span class="operator">></span>hostNameEdit<span class="operator">-</span><span class="operator">></span>setLayout(layout); padLock<span class="operator">-</span><span class="operator">></span>hide(); } <span class="type">void</span> SslClient<span class="operator">::</span>setupSecureSocket() { <span class="keyword">if</span> (socket) <span class="keyword">return</span>; socket <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qsslsocket.html">QSslSocket</a></span>(<span class="keyword">this</span>); connect(socket<span class="operator">,</span> SIGNAL(stateChanged(<span class="type"><a href="qabstractsocket.html">QAbstractSocket</a></span><span class="operator">::</span>SocketState))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(socketStateChanged(<span class="type"><a href="qabstractsocket.html">QAbstractSocket</a></span><span class="operator">::</span>SocketState))); connect(socket<span class="operator">,</span> SIGNAL(encrypted())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(socketEncrypted())); connect(socket<span class="operator">,</span> SIGNAL(error(<span class="type"><a href="qabstractsocket.html">QAbstractSocket</a></span><span class="operator">::</span>SocketError))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(socketError(<span class="type"><a href="qabstractsocket.html">QAbstractSocket</a></span><span class="operator">::</span>SocketError))); connect(socket<span class="operator">,</span> SIGNAL(sslErrors(<span class="type"><a href="../qtcore/qlist.html">QList</a></span><span class="operator"><</span><span class="type"><a href="qsslerror.html">QSslError</a></span><span class="operator">></span>))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(sslErrors(<span class="type"><a href="../qtcore/qlist.html">QList</a></span><span class="operator"><</span><span class="type"><a href="qsslerror.html">QSslError</a></span><span class="operator">></span>))); connect(socket<span class="operator">,</span> SIGNAL(readyRead())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(socketReadyRead())); } <span class="type">void</span> SslClient<span class="operator">::</span>appendString(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> <span class="operator">&</span>line) { <span class="type"><a href="../qtgui/qtextcursor.html">QTextCursor</a></span> cursor(form<span class="operator">-</span><span class="operator">></span>sessionOutput<span class="operator">-</span><span class="operator">></span>textCursor()); cursor<span class="operator">.</span>movePosition(<span class="type"><a href="../qtgui/qtextcursor.html">QTextCursor</a></span><span class="operator">::</span>End); cursor<span class="operator">.</span>insertText(line); form<span class="operator">-</span><span class="operator">></span>sessionOutput<span class="operator">-</span><span class="operator">></span>verticalScrollBar()<span class="operator">-</span><span class="operator">></span>setValue(form<span class="operator">-</span><span class="operator">></span>sessionOutput<span class="operator">-</span><span class="operator">></span>verticalScrollBar()<span class="operator">-</span><span class="operator">></span>maximum()); } </pre> </div> <!-- @@@securesocketclient/sslclient.cpp --> </div> </div> </div> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2019 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners.<br/> The documentation provided herein is licensed under the terms of the <a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation License version 1.3</a> as published by the Free Software Foundation.<br/> Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners. </p> </div> </body> </html>