update-client/Common/DeviceIdentityHelper.h

#pragma once

#include <QByteArray>
#include <QString>

class DeviceIdentityHelper {
public:
    explicit DeviceIdentityHelper(const QString &installDir);

    bool ensureIssued(
        const QString &apiBaseUrl,
        const QString &clientToken,
        const QString &appId,
        const QString &channel,
        const QString &licenseKey);
    bool verifyLocal(const QString &appId, const QString &channel);

    QString deviceId() const;
    QString errorString() const;

private:
    bool loadAndVerify(const QString &expectedAppId, const QString &expectedChannel);
    bool verifySignature(const QByteArray &payload, const QString &signatureBase64);

    QString m_installDir;
    QString m_deviceId;
    QString m_error;
};