From 3849a2466208a741165385f20150bddad59d2b8c Mon Sep 17 00:00:00 2001
From: Carl Schwan <carl@carlschwan.eu>
Date: Fri, 22 Jan 2021 23:36:47 +0100
Subject: Start implementing Qt olm binding

---
 lib/olm/qolmaccount.h | 89 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 89 insertions(+)
 create mode 100644 lib/olm/qolmaccount.h

(limited to 'lib/olm/qolmaccount.h')

diff --git a/lib/olm/qolmaccount.h b/lib/olm/qolmaccount.h
new file mode 100644
index 00000000..219d7e48
--- /dev/null
+++ b/lib/olm/qolmaccount.h
@@ -0,0 +1,89 @@
+// SPDX-FileCopyrightText: 2021 Carl Schwan <carlschwan@kde.org>
+//
+// SPDX-License-Identifier: LGPL-2.1-or-later
+#pragma once
+
+#include <QObject>
+#include <QMap>
+#include <optional>
+#include <string>
+#include <variant>
+#include "olm/olm.h"
+
+struct OlmAccount;
+
+struct Unencrypted {};
+struct Encrypted {
+    QByteArray key;
+};
+
+using PicklingMode = std::variant<Unencrypted, Encrypted>;
+
+template<class... Ts> struct overloaded : Ts... { using Ts::operator()...; };
+template<class... Ts> overloaded(Ts...) -> overloaded<Ts...>;
+
+struct IdentityKeys
+{
+    QByteArray curve25519;
+    QByteArray ed25519;
+};
+
+//! Struct representing the the one-time keys.
+struct OneTimeKeys
+{
+    QMap<QString, QMap<QString, QString>> keys;
+
+    //! Get the HashMap containing the curve25519 one-time keys.
+    QMap<QString, QString> curve25519() const;
+
+    //! Get a reference to the hashmap corresponding to given key type.
+    std::optional<QMap<QString, QString>> get(QString keyType) const;
+};
+
+bool operator==(const IdentityKeys& lhs, const IdentityKeys& rhs);
+
+//! An olm account manages all cryptographic keys used on a device.
+//! \code{.cpp}
+//! const auto olmAccount = new QOlmAccount(this);
+//! \endcode
+class QOlmAccount
+{
+public:
+    enum OlmAccountError {
+        BadAccountKey,
+        BadMessageKeyId,
+        InvalidBase64,
+        NotEnoughRandom,
+        OutputBufferTooSmall,
+        Unknown,
+    };
+
+    //! Creates a new instance of OlmAccount. During the instantiation
+    //! the Ed25519 fingerprint key pair and the Curve25519 identity key
+    //! pair are generated. For more information see <a
+    //! href="https://matrix.org/docs/guides/e2e_implementation.html#keys-used-in-end-to-end-encryption">here</a>.
+    static std::optional<QOlmAccount> create();
+    static std::variant<QOlmAccount, OlmAccountError> unpickle(QByteArray picked, PicklingMode mode);
+
+    //! Serialises an OlmAccount to encrypted Base64.
+    std::variant<QByteArray, OlmAccountError> pickle(PicklingMode mode);
+    std::variant<IdentityKeys, OlmAccountError> identityKeys();
+
+    //! Returns the signature of the supplied message.
+    std::variant<QString, OlmAccountError> sign(QString message) const;
+
+    //! Maximum number of one time keys that this OlmAccount can
+    //! currently hold.
+    size_t maxNumberOfOneTimeKeys() const;
+
+    //! Generates the supplied number of one time keys.
+    std::optional<OlmAccountError> generateOneTimeKeys(size_t numberOfKeys) const;
+
+    //! Gets the OlmAccount's one time keys formatted as JSON.
+    std::variant<OneTimeKeys, OlmAccountError> oneTimeKeys() const;
+
+    // HACK do not use directly
+    QOlmAccount(OlmAccount *account);
+private:
+    OlmAccount *m_account;
+};
-- 
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