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// SPDX-FileCopyrightText: 2021 Nheko Contributors
// SPDX-FileCopyrightText: 2022 Nheko Contributors
//
// SPDX-License-Identifier: GPL-3.0-or-later
#pragma once
#include <QObject>
#include <mtx/responses/crypto.hpp>
#include "CacheCryptoStructs.h"
#include "Logging.h"
#include "MatrixClient.h"
#include "Olm.h"
#include "timeline/TimelineModel.h"
class QTimer;
using sas_ptr = std::unique_ptr<mtx::crypto::SAS>;
// clang-format off
/*
* Stolen from fluffy chat :D
*
* State | +-------------+ +-----------+ |
* | | AliceDevice | | BobDevice | |
* | | (sender) | | | |
* | +-------------+ +-----------+ |
* promptStartVerify | | | |
* | o | (m.key.verification.request) | |
* | p |-------------------------------->| (ASK FOR VERIFICATION REQUEST) |
* waitForOtherAccept | t | | | promptStartVerify
* && | i | (m.key.verification.ready) | |
* no commitment | o |<--------------------------------| |
* && | n | | |
* no canonical_json | a | (m.key.verification.start) | | waitingForKeys
* | l |<--------------------------------| Not sending to prevent the glare resolve| && no commitment
* | | | (1) | && no canonical_json
* | | m.key.verification.start | |
* waitForOtherAccept | |-------------------------------->| (IF NOT ALREADY ASKED, |
* && | | | ASK FOR VERIFICATION REQUEST) | promptStartVerify, if not accepted
* canonical_json | | m.key.verification.accept | |
* | |<--------------------------------| |
* waitForOtherAccept | | | | waitingForKeys
* && | | m.key.verification.key | | && canonical_json
* commitment | |-------------------------------->| | && commitment
* | | | |
* | | m.key.verification.key | |
* | |<--------------------------------| |
* compareEmoji/Number| | | | compareEmoji/Number
* | | COMPARE EMOJI / NUMBERS | |
* | | | |
* waitingForMac | | m.key.verification.mac | | waitingForMac
* | success |<------------------------------->| success |
* | | | |
* success/fail | | m.key.verification.done | | success/fail
* | |<------------------------------->| |
*
* (1) Sometimes the other side does send this start. In this case we run the glare algorithm and send an accept only if
* We are the bigger mxid and deviceid (since we discard our start message). <- GLARE RESOLUTION
*/
// clang-format on
class DeviceVerificationFlow : public QObject
{
Q_OBJECT
Q_PROPERTY(QString state READ state NOTIFY stateChanged)
Q_PROPERTY(Error error READ error NOTIFY errorChanged)
Q_PROPERTY(QString userId READ getUserId CONSTANT)
Q_PROPERTY(QString deviceId READ getDeviceId CONSTANT)
Q_PROPERTY(bool sender READ getSender CONSTANT)
Q_PROPERTY(std::vector<int> sasList READ getSasList CONSTANT)
Q_PROPERTY(bool isDeviceVerification READ isDeviceVerification CONSTANT)
Q_PROPERTY(bool isSelfVerification READ isSelfVerification CONSTANT)
Q_PROPERTY(bool isMultiDeviceVerification READ isMultiDeviceVerification CONSTANT)
public:
enum State
{
PromptStartVerification,
WaitingForOtherToAccept,
WaitingForKeys,
CompareEmoji,
CompareNumber,
WaitingForMac,
Success,
Failed,
};
Q_ENUM(State)
enum Type
{
ToDevice,
RoomMsg
};
enum Error
{
UnknownMethod,
MismatchedCommitment,
MismatchedSAS,
KeyMismatch,
Timeout,
User,
OutOfOrder,
};
Q_ENUM(Error)
static QSharedPointer<DeviceVerificationFlow>
NewInRoomVerification(QObject *parent_,
TimelineModel *timelineModel_,
const mtx::events::msg::KeyVerificationRequest &msg,
QString other_user_,
QString event_id_);
static QSharedPointer<DeviceVerificationFlow>
NewToDeviceVerification(QObject *parent_,
const mtx::events::msg::KeyVerificationRequest &msg,
QString other_user_,
QString txn_id_);
static QSharedPointer<DeviceVerificationFlow>
NewToDeviceVerification(QObject *parent_,
const mtx::events::msg::KeyVerificationStart &msg,
QString other_user_,
QString txn_id_);
static QSharedPointer<DeviceVerificationFlow>
InitiateUserVerification(QObject *parent_, TimelineModel *timelineModel_, QString userid);
static QSharedPointer<DeviceVerificationFlow>
InitiateDeviceVerification(QObject *parent, QString userid, std::vector<QString> devices);
// getters
QString state();
Error error() { return error_; }
QString getUserId();
QString getDeviceId();
bool getSender();
std::vector<int> getSasList();
QString transactionId() { return QString::fromStdString(this->transaction_id); }
// setters
void setDeviceId(QString deviceID);
void setEventId(std::string event_id);
bool isDeviceVerification() const
{
return this->type == DeviceVerificationFlow::Type::ToDevice;
}
bool isSelfVerification() const;
bool isMultiDeviceVerification() const { return deviceIds.size() > 1; }
void callback_fn(const UserKeyCache &res, mtx::http::RequestErr err, std::string user_id);
public slots:
//! unverifies a device
void unverify();
//! Continues the flow
void next();
//! Cancel the flow
void cancel() { cancelVerification(User); }
signals:
void refreshProfile();
void stateChanged();
void errorChanged();
private:
DeviceVerificationFlow(QObject *,
DeviceVerificationFlow::Type flow_type,
TimelineModel *model,
QString userID,
std::vector<QString> deviceIds_);
void setState(State state)
{
if (state != state_) {
state_ = state;
emit stateChanged();
}
}
void handleStartMessage(const mtx::events::msg::KeyVerificationStart &msg, std::string);
//! sends a verification request
void sendVerificationRequest();
//! accepts a verification request
void sendVerificationReady();
//! completes the verification flow();
void sendVerificationDone();
//! accepts a verification
void acceptVerificationRequest();
//! starts the verification flow
void startVerificationRequest();
//! cancels a verification flow
void cancelVerification(DeviceVerificationFlow::Error error_code);
//! sends the verification key
void sendVerificationKey();
//! sends the mac of the keys
void sendVerificationMac();
//! Completes the verification flow
void acceptDevice();
std::string transaction_id;
bool sender;
Type type;
mtx::identifiers::User toClient;
QString deviceId;
std::vector<QString> deviceIds;
// public part of our master key, when trusted or empty
std::string our_trusted_master_key;
mtx::events::msg::SASMethods method = mtx::events::msg::SASMethods::Emoji;
QTimer *timeout = nullptr;
sas_ptr sas;
std::string mac_method;
std::string commitment;
std::string canonical_json;
std::vector<int> sasList;
UserKeyCache their_keys;
TimelineModel *model_;
mtx::common::Relation relation;
State state_ = PromptStartVerification;
Error error_ = UnknownMethod;
bool isMacVerified = false;
template<typename T>
void send(T msg)
{
if (this->type == DeviceVerificationFlow::Type::ToDevice) {
mtx::requests::ToDeviceMessages<T> body;
msg.transaction_id = this->transaction_id;
for (const auto &d : deviceIds)
body[this->toClient][d.toStdString()] = msg;
http::client()->send_to_device<T>(
http::client()->generate_txn_id(), body, [](mtx::http::RequestErr err) {
if (err)
nhlog::net()->warn("failed to send verification to_device message: {} {}",
err->matrix_error.error,
static_cast<int>(err->status_code));
});
} else if (this->type == DeviceVerificationFlow::Type::RoomMsg && model_) {
if constexpr (!std::is_same_v<T, mtx::events::msg::KeyVerificationRequest>) {
msg.relations.relations.push_back(this->relation);
// Set synthesized to surpress the nheko relation extensions
msg.relations.synthesized = true;
}
(model_)->sendMessageEvent(msg, mtx::events::to_device_content_to_type<T>);
}
nhlog::net()->debug("Sent verification step: {} in state: {}",
mtx::events::to_string(mtx::events::to_device_content_to_type<T>),
state().toStdString());
}
};
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