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// Copyright (C) 2017 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include "certificateinfo.h"
#include "sslclient.h"
#include "ui_sslclient.h"
#include "ui_sslerrors.h"
SslClient::SslClient(QWidget *parent)
: QWidget(parent)
{
setupUi();
setupSecureSocket();
}
SslClient::~SslClient()
{
delete socket;
delete form;
}
void SslClient::updateEnabledState()
{
const bool unconnected = socket->state() == QAbstractSocket::UnconnectedState;
form->hostNameEdit->setReadOnly(!unconnected);
form->hostNameEdit->setFocusPolicy(unconnected ? Qt::StrongFocus : Qt::NoFocus);
form->hostNameLabel->setEnabled(unconnected);
form->portBox->setEnabled(unconnected);
form->portLabel->setEnabled(unconnected);
form->connectButton->setEnabled(unconnected && !form->hostNameEdit->text().isEmpty());
const bool connected = socket->state() == QAbstractSocket::ConnectedState;
form->sessionOutput->setEnabled(connected);
form->sessionInput->setEnabled(connected);
form->sessionInputLabel->setEnabled(connected);
form->sendButton->setEnabled(connected);
}
void SslClient::secureConnect()
{
socket->connectToHostEncrypted(form->hostNameEdit->text(), form->portBox->value());
updateEnabledState();
}
void SslClient::socketStateChanged(QAbstractSocket::SocketState state)
{
if (executingDialog)
return;
updateEnabledState();
if (state == QAbstractSocket::UnconnectedState) {
form->sessionInput->clear();
form->hostNameEdit->setPalette(QPalette());
form->hostNameEdit->setFocus();
form->cipherLabel->setText(tr("<none>"));
padLock->hide();
}
}
void SslClient::socketEncrypted()
{
form->sessionOutput->clear();
form->sessionInput->setFocus();
QPalette palette;
palette.setColor(QPalette::Base, QColor(255, 255, 192));
form->hostNameEdit->setPalette(palette);
const QSslCipher cipher = socket->sessionCipher();
const QString cipherInfo = QString("%1, %2 (%3/%4)").arg(cipher.authenticationMethod())
.arg(cipher.name()).arg(cipher.usedBits())
.arg(cipher.supportedBits());
form->cipherLabel->setText(cipherInfo);
padLock->show();
}
void SslClient::socketReadyRead()
{
appendString(QString::fromUtf8(socket->readAll()));
}
void SslClient::sendData()
{
const QString input = form->sessionInput->text();
appendString(input + '\n');
socket->write(input.toUtf8() + "\r\n");
form->sessionInput->clear();
}
void SslClient::socketError(QAbstractSocket::SocketError)
{
if (handlingSocketError)
return;
handlingSocketError = true;
QMessageBox::critical(this, tr("Connection error"), socket->errorString());
handlingSocketError = false;
}
void SslClient::sslErrors(const QList<QSslError> &errors)
{
QDialog errorDialog(this);
Ui_SslErrors ui;
ui.setupUi(&errorDialog);
connect(ui.certificateChainButton, &QPushButton::clicked,
this, &SslClient::displayCertificateInfo);
for (const auto &error : errors)
ui.sslErrorList->addItem(error.errorString());
executingDialog = true;
if (errorDialog.exec() == QDialog::Accepted)
socket->ignoreSslErrors();
executingDialog = false;
// did the socket state change?
if (socket->state() != QAbstractSocket::ConnectedState)
socketStateChanged(socket->state());
}
void SslClient::displayCertificateInfo()
{
CertificateInfo info;
info.setCertificateChain(socket->peerCertificateChain());
info.exec();
}
void SslClient::setupUi()
{
if (form)
return;
form = new Ui_Form;
form->setupUi(this);
form->hostNameEdit->setSelection(0, form->hostNameEdit->text().size());
form->sessionOutput->setHtml(tr("<not connected>"));
connect(form->hostNameEdit, &QLineEdit::textChanged,
this, &SslClient::updateEnabledState);
connect(form->connectButton, &QPushButton::clicked,
this, &SslClient::secureConnect);
connect(form->sendButton, &QPushButton::clicked,
this, &SslClient::sendData);
padLock = new QToolButton;
padLock->setIcon(QIcon(":/encrypted.png"));
connect(padLock, &QToolButton::clicked,
this, &SslClient::displayCertificateInfo);
#if QT_CONFIG(cursor)
padLock->setCursor(Qt::ArrowCursor);
#endif
padLock->setToolTip(tr("Display encryption details."));
const int extent = form->hostNameEdit->height() - 2;
padLock->resize(extent, extent);
padLock->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Ignored);
QHBoxLayout *layout = new QHBoxLayout(form->hostNameEdit);
const int margin = form->hostNameEdit->style()->pixelMetric(QStyle::PM_DefaultFrameWidth);
layout->setContentsMargins(margin, margin, margin, margin);
layout->setSpacing(0);
layout->addStretch();
layout->addWidget(padLock);
form->hostNameEdit->setLayout(layout);
padLock->hide();
}
void SslClient::setupSecureSocket()
{
if (socket)
return;
socket = new QSslSocket(this);
connect(socket, &QSslSocket::stateChanged,
this, &SslClient::socketStateChanged);
connect(socket, &QSslSocket::encrypted,
this, &SslClient::socketEncrypted);
connect(socket, &QSslSocket::errorOccurred,
this, &SslClient::socketError);
connect(socket, QOverload<const QList<QSslError> &>::of(&QSslSocket::sslErrors),
this, &SslClient::sslErrors);
connect(socket, &QSslSocket::readyRead,
this, &SslClient::socketReadyRead);
}
void SslClient::appendString(const QString &line)
{
QTextCursor cursor(form->sessionOutput->textCursor());
cursor.movePosition(QTextCursor::End);
cursor.insertText(line);
form->sessionOutput->verticalScrollBar()->setValue(form->sessionOutput->verticalScrollBar()->maximum());
}
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