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// SPDX-FileCopyrightText: 2021 Carl Schwan <carlschwan@kde.org>
//
// SPDX-License-Identifier: LGPL-2.1-or-later
#pragma once
#ifdef Quotient_E2EE_ENABLED
#include "olm/olm.h" // from Olm
#include "olm/errors.h"
#include "olm/e2ee.h"
namespace Quotient {
//! An out-bound group session is responsible for encrypting outgoing
//! communication in a Megolm session.
class QOlmOutboundGroupSession
{
public:
~QOlmOutboundGroupSession();
//! Creates a new instance of `QOlmOutboundGroupSession`.
static std::variant<QOlmOutboundGroupSession, OlmError> create();
//! Serialises an `QOlmOutboundGroupSession` to encrypted Base64.
std::variant<QByteArray, OlmError> pickle(const PicklingMode &mode);
//! Deserialises from encrypted Base64 that was previously obtained by
//! pickling a `QOlmOutboundGroupSession`.
static std::variant<QOlmOutboundGroupSession, OlmError> unpickle(QByteArray &pickled, const PicklingMode &mode);
//! Encrypts a plaintext message using the session.
std::variant<QString, OlmError> encrypt(QString &plaintext);
//! Get the current message index for this session.
//!
//! Each message is sent with an increasing index; this returns the
//! index for the next message.
uint32_t sessionMessageIndex() const;
//! Get a base64-encoded identifier for this session.
std::variant<QByteArray, OlmError> sessionId() const;
//! Get the base64-encoded current ratchet key for this session.
//!
//! Each message is sent with a different ratchet key. This function returns the
//! ratchet key that will be used for the next message.
std::variant<QByteArray, OlmError> sessionKey() const;
private:
QOlmOutboundGroupSession(OlmOutboundGroupSession *groupSession, const QByteArray &groupSessionBuf);
OlmOutboundGroupSession *m_groupSession;
QByteArray m_buffer;
};
}
#endif
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