sssshandler.h

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// SPDX-FileCopyrightText: 2023 Tobias Fella <tobias.fella@kde.org>
// SPDX-License-Identifier: LGPL-2.0-or-later
 
#pragma once
 
#include "cryptoutils.h"
 
#include "../connection.h"
 
#include <QtCore/QObject>
#include <QtCore/QPointer>
 
namespace Quotient {
class QUOTIENT_API SSSSHandler : public QObject
{
    Q_OBJECT
    QML_ELEMENT
    Q_PROPERTY(Quotient::Connection* connection READ connection WRITE setConnection NOTIFY connectionChanged)
 
public:
    enum Error
    {
        WrongKeyError,
        NoKeyError,
        DecryptionError,
        InvalidSignatureError,
        UnsupportedAlgorithmError,
    };
    Q_ENUM(Error)
 
    using QObject::QObject;
 
    //! \brief Unlock the secret backup from the given passprhase
    Q_INVOKABLE void unlockSSSSWithPassphrase(const QString& passphrase);
 
    //! \brief Unlock the secret backup by requesting the decryption keys from other devices
    Q_INVOKABLE void unlockSSSSFromCrossSigning();
 
    //! \brief Unlock the secret backup from the given security key
    Q_INVOKABLE void unlockSSSSFromSecurityKey(const QString& encodedKey);
 
    Connection* connection() const;
    void setConnection(Connection* connection);
 
Q_SIGNALS:
    void keyBackupUnlocked();
    void error(Error error);
    void connectionChanged();
 
    //! \brief Emitted after keys are loaded
    void finished();
 
private:
    QPointer<Connection> m_connection;
 
    //! \brief Decrypt the key with this name from the account data
    QByteArray decryptKey(event_type_t keyType, const QString& defaultKey, key_view_t decryptionKey);
 
    void loadMegolmBackup(const QByteArray& megolmDecryptionKey);
    struct UnlockData;
    void unlockAndLoad(const UnlockData& unlockData, key_view_t decryptingKey);
};
} // namespace Quotient