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// SPDX-FileCopyrightText: 2019 Alexey Andreyev <aa13q@ya.ru>
// SPDX-FileCopyrightText: 2019 Kitsune Ral <Kitsune-Ral@users.sf.net>
// SPDX-FileCopyrightText: 2021 Carl Schwan <carlschwan@kde.org>
// SPDX-License-Identifier: LGPL-2.1-or-later
#pragma once
#include "converters.h"
#include "expected.h"
#include "qolmerrors.h"
#include <QtCore/QMetaType>
#include <QtCore/QStringBuilder>
#include <array>
#include <variant>
namespace Quotient {
constexpr auto CiphertextKeyL = "ciphertext"_ls;
constexpr auto SenderKeyKeyL = "sender_key"_ls;
constexpr auto DeviceIdKeyL = "device_id"_ls;
constexpr auto SessionIdKeyL = "session_id"_ls;
constexpr auto AlgorithmKeyL = "algorithm"_ls;
constexpr auto RotationPeriodMsKeyL = "rotation_period_ms"_ls;
constexpr auto RotationPeriodMsgsKeyL = "rotation_period_msgs"_ls;
constexpr auto AlgorithmKey = "algorithm"_ls;
constexpr auto RotationPeriodMsKey = "rotation_period_ms"_ls;
constexpr auto RotationPeriodMsgsKey = "rotation_period_msgs"_ls;
constexpr auto Ed25519Key = "ed25519"_ls;
constexpr auto Curve25519Key = "curve25519"_ls;
constexpr auto SignedCurve25519Key = "signed_curve25519"_ls;
constexpr auto OlmV1Curve25519AesSha2AlgoKey = "m.olm.v1.curve25519-aes-sha2"_ls;
constexpr auto MegolmV1AesSha2AlgoKey = "m.megolm.v1.aes-sha2"_ls;
inline bool isSupportedAlgorithm(const QString& algorithm)
{
static constexpr std::array SupportedAlgorithms {
OlmV1Curve25519AesSha2AlgoKey, MegolmV1AesSha2AlgoKey
};
return std::find(SupportedAlgorithms.cbegin(), SupportedAlgorithms.cend(),
algorithm)
!= SupportedAlgorithms.cend();
}
struct Unencrypted {};
struct Encrypted {
QByteArray key;
};
using PicklingMode = std::variant<Unencrypted, Encrypted>;
class QOlmSession;
using QOlmSessionPtr = std::unique_ptr<QOlmSession>;
class QOlmInboundGroupSession;
using QOlmInboundGroupSessionPtr = std::unique_ptr<QOlmInboundGroupSession>;
class QOlmOutboundGroupSession;
using QOlmOutboundGroupSessionPtr = std::unique_ptr<QOlmOutboundGroupSession>;
template <typename T>
using QOlmExpected = Expected<T, QOlmError>;
struct IdentityKeys
{
QByteArray curve25519;
QByteArray ed25519;
};
//! Struct representing the one-time keys.
struct UnsignedOneTimeKeys
{
QHash<QString, QHash<QString, QString>> keys;
//! Get the HashMap containing the curve25519 one-time keys.
QHash<QString, QString> curve25519() const { return keys[Curve25519Key]; }
};
class SignedOneTimeKey {
public:
explicit SignedOneTimeKey(const QString& unsignedKey, const QString& userId,
const QString& deviceId, const QString& signature)
: payload { { "key"_ls, unsignedKey },
{ "signatures"_ls,
QJsonObject {
{ userId, QJsonObject { { "ed25519:"_ls % deviceId,
signature } } } } } }
{}
explicit SignedOneTimeKey(const QJsonObject& jo = {})
: payload(jo)
{}
//! Unpadded Base64-encoded 32-byte Curve25519 public key
QString key() const { return payload["key"_ls].toString(); }
//! \brief Signatures of the key object
//!
//! The signature is calculated using the process described at
//! https://spec.matrix.org/v1.3/appendices/#signing-json
auto signatures() const
{
return fromJson<QHash<QString, QHash<QString, QString>>>(
payload["signatures"_ls]);
}
QByteArray signature(QStringView userId, QStringView deviceId) const
{
return payload["signatures"_ls][userId]["ed25519:"_ls % deviceId]
.toString()
.toLatin1();
}
//! Whether the key is a fallback key
bool isFallback() const { return payload["fallback"_ls].toBool(); }
auto toJson() const { return payload; }
auto toJsonForVerification() const
{
auto json = payload;
json.remove("signatures"_ls);
json.remove("unsigned"_ls);
return QJsonDocument(json).toJson(QJsonDocument::Compact);
}
private:
QJsonObject payload;
};
using OneTimeKeys = QHash<QString, std::variant<QString, SignedOneTimeKey>>;
template <typename T>
class asKeyValueRange
{
public:
asKeyValueRange(T& data)
: m_data { data }
{}
auto begin() { return m_data.keyValueBegin(); }
auto end() { return m_data.keyValueEnd(); }
private:
T &m_data;
};
template <typename T>
asKeyValueRange(T&) -> asKeyValueRange<T>;
} // namespace Quotient
Q_DECLARE_METATYPE(Quotient::SignedOneTimeKey)
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