Add basic support for WebAuthn (Passkeys) (#8825)

---------

Co-authored-by: varjolintu <sami.vanttinen@protonmail.com>
Co-authored-by: droidmonkey <support@dmapps.us>

src/browser/BrowserPasskeysConfirmationDialog.h

@@ -0,0 +1,66 @@
+/*
+ *  Copyright (C) 2023 KeePassXC Team <team@keepassxc.org>
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef KEEPASSXC_BROWSERPASSKEYSCONFIRMATIONDIALOG_H
+#define KEEPASSXC_BROWSERPASSKEYSCONFIRMATIONDIALOG_H
+
+#include <QDialog>
+#include <QTableWidget>
+#include <QTimer>
+
+class Entry;
+
+namespace Ui
+{
+    class BrowserPasskeysConfirmationDialog;
+}
+
+class BrowserPasskeysConfirmationDialog : public QDialog
+{
+    Q_OBJECT
+
+public:
+    explicit BrowserPasskeysConfirmationDialog(QWidget* parent = nullptr);
+    ~BrowserPasskeysConfirmationDialog() override;
+
+    void registerCredential(const QString& username,
+                            const QString& siteId,
+                            const QList<Entry*>& existingEntries,
+                            int timeout);
+    void authenticateCredential(const QList<Entry*>& entries, const QString& origin, int timeout);
+    Entry* getSelectedEntry() const;
+    bool isPasskeyUpdated() const;
+
+private slots:
+    void updatePasskey();
+    void updateProgressBar();
+    void updateSeconds();
+
+private:
+    void startCounter(int timeout);
+    void updateTimeoutLabel();
+    void updateEntriesToTable(const QList<Entry*>& entries);
+
+private:
+    QScopedPointer<Ui::BrowserPasskeysConfirmationDialog> m_ui;
+    QList<Entry*> m_entries;
+    QTimer m_timer;
+    int m_counter;
+    bool m_passkeyUpdated;
+};
+
+#endif // KEEPASSXC_BROWSERPASSKEYSCONFIRMATIONDIALOG_H