Qt OPC UA Viewer Example

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#include "certificatedialog.h" #include "ui_certificatedialog.h" #include <QFile> #include <QPushButton> CertificateDialog::CertificateDialog(QWidget *parent) : QDialog(parent), ui(new Ui::CertificateDialog) { ui->setupUi(this); connect(ui->btnTrust, &QPushButton::clicked, this, &CertificateDialog::saveCertificate); } CertificateDialog::~CertificateDialog() { delete ui; } /** Returns 0 if the connect should be aborted, 1 if it should be resumed. */ int CertificateDialog::showCertificate(const QString &message, const QByteArray &der, const QString &trustListDirectory) { QList<QSslCertificate> certs = QSslCertificate::fromData(der, QSsl::Der); m_trustListDirectory = trustListDirectory; // if it is a unstrusted self-signed certificate we can allow to trust it if (certs.count() == 1 && certs[0].isSelfSigned()) { m_cert = certs[0]; ui->btnTrust->setEnabled(true); } else { ui->btnTrust->setEnabled(false); } for (const QSslCertificate &cert : qAsConst(certs)) ui->certificate->appendPlainText(cert.toText()); ui->message->setText(message); ui->certificate->moveCursor(QTextCursor::Start); ui->certificate->ensureCursorVisible(); return exec(); } void CertificateDialog::saveCertificate() { const QByteArray digest = m_cert.digest(); const QString path = m_trustListDirectory + QLatin1Char('/') + QLatin1String(digest.toHex()) + QLatin1String(".der"); QFile file(path); if (file.open(QIODevice::WriteOnly)) { file.write(m_cert.toDer()); file.close(); } }