/****************************************************************************+
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**+
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** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).+
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** All rights reserved.+
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** Contact: Nokia Corporation (qt-info@nokia.com)+
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**+
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** This file is part of the examples of the Qt Toolkit.+
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**+
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** $QT_BEGIN_LICENSE:LGPL$+
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** No Commercial Usage+
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** This file contains pre-release code and may not be distributed.+
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** You may use this file in accordance with the terms and conditions+
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** contained in the Technology Preview License Agreement accompanying+
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** this package.+
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**+
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** GNU Lesser General Public License Usage+
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** Alternatively, this file may be used under the terms of the GNU Lesser+
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** General Public License version 2.1 as published by the Free Software+
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** Foundation and appearing in the file LICENSE.LGPL included in the+
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** packaging of this file.  Please review the following information to+
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** ensure the GNU Lesser General Public License version 2.1 requirements+
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.+
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**+
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** In addition, as a special exception, Nokia gives you certain additional+
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** rights.  These rights are described in the Nokia Qt LGPL Exception+
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.+
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**+
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** If you have questions regarding the use of this file, please contact+
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** Nokia at qt-info@nokia.com.+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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** $QT_END_LICENSE$+
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**+
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****************************************************************************/+
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+
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#include "certificateinfo.h"+
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#include "sslclient.h"+
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#include "ui_sslclient.h"+
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#include "ui_sslerrors.h"+
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+
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#include <QtGui/QScrollBar>+
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#include <QtGui/QStyle>+
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#include <QtGui/QToolButton>+
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#include <QtNetwork/QSslCipher>+
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+
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SslClient::SslClient(QWidget *parent)+
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    : QWidget(parent), socket(0), padLock(0), executingDialog(false)+
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{+
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    form = new Ui_Form;+
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    form->setupUi(this);+
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    form->hostNameEdit->setSelection(0, form->hostNameEdit->text().size());+
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    form->sessionOutput->setHtml(tr("&lt;not connected&gt;"));+
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+
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    connect(form->hostNameEdit, SIGNAL(textChanged(QString)),+
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            this, SLOT(updateEnabledState()));+
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    connect(form->connectButton, SIGNAL(clicked()),+
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            this, SLOT(secureConnect()));+
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    connect(form->sendButton, SIGNAL(clicked()),+
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            this, SLOT(sendData()));+
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}+
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+
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SslClient::~SslClient()+
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{+
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    delete form;+
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}+
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+
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void SslClient::updateEnabledState()+
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{+
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    bool unconnected = !socket || socket->state() == QAbstractSocket::UnconnectedState;+
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+
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    form->hostNameEdit->setReadOnly(!unconnected);+
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    form->hostNameEdit->setFocusPolicy(unconnected ? Qt::StrongFocus : Qt::NoFocus);+
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+
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    form->hostNameLabel->setEnabled(unconnected);+
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    form->portBox->setEnabled(unconnected);+
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    form->portLabel->setEnabled(unconnected);+
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    form->connectButton->setEnabled(unconnected && !form->hostNameEdit->text().isEmpty());+
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+
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    bool connected = socket && socket->state() == QAbstractSocket::ConnectedState;+
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    form->sessionBox->setEnabled(connected);+
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    form->sessionOutput->setEnabled(connected);+
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    form->sessionInput->setEnabled(connected);+
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    form->sessionInputLabel->setEnabled(connected);+
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    form->sendButton->setEnabled(connected);+
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}+
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+
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void SslClient::secureConnect()+
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{+
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    if (!socket) {+
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        socket = new QSslSocket(this);+
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        connect(socket, SIGNAL(stateChanged(QAbstractSocket::SocketState)),+
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                this, SLOT(socketStateChanged(QAbstractSocket::SocketState)));+
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        connect(socket, SIGNAL(encrypted()),+
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                this, SLOT(socketEncrypted()));+
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        connect(socket, SIGNAL(sslErrors(QList<QSslError>)),+
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                this, SLOT(sslErrors(QList<QSslError>)));+
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        connect(socket, SIGNAL(readyRead()),+
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                this, SLOT(socketReadyRead()));+
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    }+
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+
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    socket->connectToHostEncrypted(form->hostNameEdit->text(), form->portBox->value());+
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    updateEnabledState();+
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}+
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+
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void SslClient::socketStateChanged(QAbstractSocket::SocketState state)+
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{+
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    if (executingDialog)+
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        return;+
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+
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    updateEnabledState();+
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    if (state == QAbstractSocket::UnconnectedState) {+
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        form->hostNameEdit->setPalette(QPalette());+
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        form->hostNameEdit->setFocus();+
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        form->cipherLabel->setText(tr("<none>"));+
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        if (padLock)+
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            padLock->hide();+
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        socket->deleteLater();+
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        socket = 0;+
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    }+
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}+
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+
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void SslClient::socketEncrypted()+
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{+
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    if (!socket)+
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        return;                 // might have disconnected already+
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+
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    form->sessionOutput->clear();+
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    form->sessionInput->setFocus();+
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+
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    QPalette palette;+
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    palette.setColor(QPalette::Base, QColor(255, 255, 192));+
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    form->hostNameEdit->setPalette(palette);+
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+
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    QSslCipher ciph = socket->sessionCipher();+
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    QString cipher = QString("%1, %2 (%3/%4)").arg(ciph.authenticationMethod())+
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                     .arg(ciph.name()).arg(ciph.usedBits()).arg(ciph.supportedBits());;+
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    form->cipherLabel->setText(cipher);+
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+
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    if (!padLock) {+
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        padLock = new QToolButton;+
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        padLock->setIcon(QIcon(":/encrypted.png"));+
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#ifndef QT_NO_CURSOR+
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        padLock->setCursor(Qt::ArrowCursor);+
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#endif+
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        padLock->setToolTip(tr("Display encryption details."));+
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+
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        int extent = form->hostNameEdit->height() - 2;+
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        padLock->resize(extent, extent);+
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        padLock->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Ignored);+
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+
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        QHBoxLayout *layout = new QHBoxLayout(form->hostNameEdit);+
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        layout->setMargin(form->hostNameEdit->style()->pixelMetric(QStyle::PM_DefaultFrameWidth));+
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        layout->setSpacing(0);+
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        layout->addStretch();+
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        layout->addWidget(padLock);+
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+
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        form->hostNameEdit->setLayout(layout);+
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+
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        connect(padLock, SIGNAL(clicked()),+
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                this, SLOT(displayCertificateInfo()));+
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    } else {+
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        padLock->show();+
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    }+
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}+
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+
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void SslClient::socketReadyRead()+
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{+
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    appendString(QString::fromUtf8(socket->readAll()));+
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}+
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+
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void SslClient::sendData()+
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{+
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    QString input = form->sessionInput->text();+
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    appendString(input + "\n");+
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    socket->write(input.toUtf8() + "\r\n");+
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    form->sessionInput->clear();+
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}+
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+
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void SslClient::sslErrors(const QList<QSslError> &errors)+
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{+
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    QDialog errorDialog(this);+
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    Ui_SslErrors ui;+
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    ui.setupUi(&errorDialog);+
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    connect(ui.certificateChainButton, SIGNAL(clicked()),+
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            this, SLOT(displayCertificateInfo()));+
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+
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    foreach (const QSslError &error, errors)+
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        ui.sslErrorList->addItem(error.errorString());+
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+
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    executingDialog = true;+
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    if (errorDialog.exec() == QDialog::Accepted)+
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        socket->ignoreSslErrors();+
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    executingDialog = false;+
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+
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    // did the socket state change?+
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    if (socket->state() != QAbstractSocket::ConnectedState)+
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        socketStateChanged(socket->state());+
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}+
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+
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void SslClient::displayCertificateInfo()+
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{+
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    CertificateInfo *info = new CertificateInfo(this);+
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    info->setCertificateChain(socket->peerCertificateChain());+
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    info->exec();+
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    info->deleteLater();+
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}+
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+
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void SslClient::appendString(const QString &line)+
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{+
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    QTextCursor cursor(form->sessionOutput->textCursor());+
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    cursor.movePosition(QTextCursor::End);+
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    cursor.insertText(line);+
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    form->sessionOutput->verticalScrollBar()->setValue(form->sessionOutput->verticalScrollBar()->maximum());+
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}+
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