1 files changed, 63 insertions, 0 deletions
diff --git a/lib/e2ee/qolmoutboundsession.h b/lib/e2ee/qolmoutboundsession.h
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+++ b/lib/e2ee/qolmoutboundsession.h
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+// SPDX-FileCopyrightText: 2021 Carl Schwan <carlschwan@kde.org>
+//
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
+#pragma once
+
+#include "e2ee/e2ee.h"
+
+struct OlmOutboundGroupSession;
+
+namespace Quotient {
+
+//! An out-bound group session is responsible for encrypting outgoing
+//! communication in a Megolm session.
+class QUOTIENT_API QOlmOutboundGroupSession
+{
+public:
+    ~QOlmOutboundGroupSession();
+    //! Creates a new instance of `QOlmOutboundGroupSession`.
+    //! Throw OlmError on errors
+    static QOlmOutboundGroupSessionPtr create();
+    //! Serialises a `QOlmOutboundGroupSession` to encrypted Base64.
+    QByteArray pickle(const PicklingMode &mode) const;
+    //! Deserialises from encrypted Base64 that was previously obtained by
+    //! pickling a `QOlmOutboundGroupSession`.
+    static QOlmExpected<QOlmOutboundGroupSessionPtr> unpickle(
+        QByteArray&& pickled, const PicklingMode& mode);
+
+    //! Encrypts a plaintext message using the session.
+    QByteArray encrypt(const QByteArray& plaintext) const;
+
+    //! 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.
+    QByteArray 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.
+    QByteArray sessionKey() const;
+    QOlmOutboundGroupSession(OlmOutboundGroupSession *groupSession);
+
+    int messageCount() const;
+    void setMessageCount(int messageCount);
+
+    QDateTime creationTime() const;
+    void setCreationTime(const QDateTime& creationTime);
+
+    OlmErrorCode lastErrorCode() const;
+    const char* lastError() const;
+
+private:
+    OlmOutboundGroupSession *m_groupSession;
+    int m_messageCount = 0;
+    QDateTime m_creationTime = QDateTime::currentDateTime();
+};
+
+} // namespace Quotient