Show if there are unverified devices in a room

Also fixes some issues where nested transactions will poison the
verification cache.

resources/qml/RoomList.qml

@@ -35,6 +35,7 @@ Page {
             function onCurrentRoomChanged() {
                 if (Rooms.currentRoom)
                     roomlist.positionViewAtIndex(Rooms.roomidToIndex(Rooms.currentRoom.roomId), ListView.Contain);
+
             }
 
             target: Rooms

resources/qml/TimelineView.qml

@@ -88,6 +88,7 @@ Item {
                     Loader {
                         active: room || roomPreview
                         Layout.fillWidth: true
+
                         sourceComponent: MessageView {
                             implicitHeight: msgView.height - typingIndicator.height
                         }

resources/qml/TopBar.qml

@@ -15,6 +15,8 @@ Rectangle {
     property string roomName: room ? room.roomName : qsTr("No room selected")
     property string avatarUrl: room ? room.roomAvatarUrl : ""
     property string roomTopic: room ? room.roomTopic : ""
+    property bool isEncrypted: room ? room.isEncrypted : false
+    property int trustlevel: room ? room.trustlevel : Crypto.Unverified
 
     Layout.fillWidth: true
     implicitHeight: topLayout.height + Nheko.paddingMedium * 2
@@ -92,11 +94,33 @@ Rectangle {
             text: roomTopic
         }
 
+        EncryptionIndicator {
+            Layout.column: 3
+            Layout.row: 0
+            Layout.rowSpan: 2
+            visible: isEncrypted
+            encrypted: isEncrypted
+            trust: trustlevel
+            ToolTip.text: {
+                if (!encrypted)
+                    return qsTr("This room is not encrypted!");
+
+                switch (trust) {
+                case Crypto.Verified:
+                    return qsTr("This room contains only verified devices.");
+                case Crypto.TOFU:
+                    return qsTr("This rooms contain verified devices and devices which have never changed their master key.");
+                default:
+                    return qsTr("This room contains unverified devices!");
+                }
+            }
+        }
+
         ImageButton {
             id: roomOptionsButton
 
             visible: !!room
-            Layout.column: 3
+            Layout.column: 4
             Layout.row: 0
             Layout.rowSpan: 2
             Layout.alignment: Qt.AlignVCenter

src/Cache.cpp

@@ -114,7 +114,13 @@ ro_txn(lmdb::env &env)
                 txn           = lmdb::txn::begin(env, nullptr, MDB_RDONLY);
                 reuse_counter = 0;
         } else if (reuse_counter > 0) {
+                try {
                         txn.renew();
+                } catch (...) {
+                        txn.abort();
+                        txn           = lmdb::txn::begin(env, nullptr, MDB_RDONLY);
+                        reuse_counter = 0;
+                }
         }
         reuse_counter++;
 
@@ -290,6 +296,8 @@ Cache::setup()
 
         // What rooms are encrypted
         encryptedRooms_                      = lmdb::dbi::open(txn, ENCRYPTED_ROOMS_DB, MDB_CREATE);
+        [[maybe_unused]] auto verificationDb = getVerificationDb(txn);
+        [[maybe_unused]] auto userKeysDb     = getUserKeysDb(txn);
 
         txn.commit();
 
@@ -861,6 +869,9 @@ Cache::setNextBatchToken(lmdb::txn &txn, const QString &token)
 bool
 Cache::isInitialized()
 {
+        if (!env_.handle())
+                return false;
+
         auto txn = ro_txn(env_);
         std::string_view token;
 
@@ -3570,6 +3581,37 @@ Cache::roomMembers(const std::string &room_id)
         return members;
 }
 
+crypto::Trust
+Cache::roomVerificationStatus(const std::string &room_id)
+{
+        std::string_view keys;
+
+        crypto::Trust trust = crypto::Verified;
+
+        try {
+                auto txn = ro_txn(env_);
+
+                auto db     = getMembersDb(txn, room_id);
+                auto keysDb = getUserKeysDb(txn);
+
+                std::string_view user_id, unused;
+                auto cursor = lmdb::cursor::open(txn, db);
+                while (cursor.get(user_id, unused, MDB_NEXT)) {
+                        auto verif = verificationStatus_(std::string(user_id), txn);
+                        if (verif.unverified_device_count)
+                                return crypto::Unverified;
+                        else if (verif.user_verified == crypto::TOFU)
+                                trust = crypto::TOFU;
+                }
+        } catch (std::exception &e) {
+                nhlog::db()->error(
+                  "Failed to calculate verification status for {}: {}", room_id, e.what());
+                return crypto::Unverified;
+        }
+
+        return trust;
+}
+
 std::map<std::string, std::optional<UserKeyCache>>
 Cache::getMembersWithKeys(const std::string &room_id, bool verified_only)
 {
@@ -3751,11 +3793,17 @@ from_json(const json &j, UserKeyCache &info)
 
 std::optional<UserKeyCache>
 Cache::userKeys(const std::string &user_id)
+{
+        auto txn = ro_txn(env_);
+        return userKeys_(user_id, txn);
+}
+
+std::optional<UserKeyCache>
+Cache::userKeys_(const std::string &user_id, lmdb::txn &txn)
 {
         std::string_view keys;
 
         try {
-                auto txn = ro_txn(env_);
                 auto db  = getUserKeysDb(txn);
                 auto res = db.get(txn, user_id, keys);
 
@@ -3764,7 +3812,8 @@ Cache::userKeys(const std::string &user_id)
                 } else {
                         return {};
                 }
-        } catch (std::exception &) {
+        } catch (std::exception &e) {
+                nhlog::db()->error("Failed to retrieve user keys for {}: {}", user_id, e.what());
                 return {};
         }
 }
@@ -3799,8 +3848,14 @@ Cache::updateUserKeys(const std::string &sync_token, const mtx::responses::Query
                         auto last_changed = updateToWrite.last_changed;
                         // skip if we are tracking this and expect it to be up to date with the last
                         // sync token
-                        if (!last_changed.empty() && last_changed != sync_token)
+                        if (!last_changed.empty() && last_changed != sync_token) {
+                                nhlog::db()->debug("Not storing update for user {}, because "
+                                                   "last_changed {}, but we fetched update for {}",
+                                                   user,
+                                                   last_changed,
+                                                   sync_token);
                                 continue;
+                        }
 
                         if (!updateToWrite.master_keys.keys.empty() &&
                             update.master_keys.keys != updateToWrite.master_keys.keys) {
@@ -3859,6 +3914,7 @@ Cache::updateUserKeys(const std::string &sync_token, const mtx::responses::Query
                                 updateToWrite.seen_device_ids.insert(device_id);
                         }
                 }
+                updateToWrite.updated_at = sync_token;
                 db.put(txn, user, json(updateToWrite).dump());
         }
 
@@ -3944,35 +4000,46 @@ void
 Cache::query_keys(const std::string &user_id,
                   std::function<void(const UserKeyCache &, mtx::http::RequestErr)> cb)
 {
-        auto cache_ = cache::userKeys(user_id);
+        mtx::requests::QueryKeys req;
+        std::string last_changed;
+        {
+                auto txn    = ro_txn(env_);
+                auto cache_ = userKeys_(user_id, txn);
 
                 if (cache_.has_value()) {
-                if (!cache_->updated_at.empty() && cache_->updated_at == cache_->last_changed) {
+                        if (cache_->updated_at == cache_->last_changed) {
                                 cb(cache_.value(), {});
                                 return;
-                }
+                        } else
-        }
+                                nhlog::db()->info("Keys outdated for {}: {} vs {}",
+                                                  user_id,
+                                                  cache_->updated_at,
+                                                  cache_->last_changed);
+                } else
+                        nhlog::db()->info("No keys found for {}", user_id);
 
-        mtx::requests::QueryKeys req;
                 req.device_keys[user_id] = {};
 
-        std::string last_changed;
                 if (cache_)
                         last_changed = cache_->last_changed;
                 req.token = last_changed;
+        }
 
         // use context object so that we can disconnect again
         QObject *context{new QObject(this)};
-        QObject::connect(this,
+        QObject::connect(
+          this,
           &Cache::verificationStatusChanged,
           context,
-                         [cb, user_id, context_ = context](std::string updated_user) mutable {
+          [cb, user_id, context_ = context, this](std::string updated_user) mutable {
                   if (user_id == updated_user) {
                           context_->deleteLater();
-                                         auto keys = cache::userKeys(user_id);
+                          auto txn  = ro_txn(env_);
+                          auto keys = this->userKeys_(user_id, txn);
                           cb(keys.value_or(UserKeyCache{}), {});
                   }
-                         });
+          },
+          Qt::QueuedConnection);
 
         http::client()->query_keys(
           req,
@@ -4000,16 +4067,15 @@ to_json(json &j, const VerificationCache &info)
 void
 from_json(const json &j, VerificationCache &info)
 {
-        info.device_verified = j.at("device_verified").get<std::vector<std::string>>();
+        info.device_verified = j.at("device_verified").get<std::set<std::string>>();
-        info.device_blocked  = j.at("device_blocked").get<std::vector<std::string>>();
+        info.device_blocked  = j.at("device_blocked").get<std::set<std::string>>();
 }
 
 std::optional<VerificationCache>
-Cache::verificationCache(const std::string &user_id)
+Cache::verificationCache(const std::string &user_id, lmdb::txn &txn)
 {
         std::string_view verifiedVal;
 
-        auto txn = lmdb::txn::begin(env_);
         auto db = getVerificationDb(txn);
 
         try {
@@ -4028,6 +4094,7 @@ Cache::verificationCache(const std::string &user_id)
 
 void
 Cache::markDeviceVerified(const std::string &user_id, const std::string &key)
+{
         {
                 std::string_view val;
 
@@ -4045,11 +4112,12 @@ Cache::markDeviceVerified(const std::string &user_id, const std::string &key)
                                 if (device == key)
                                         return;
 
-                verified_state.device_verified.push_back(key);
+                        verified_state.device_verified.insert(key);
                         db.put(txn, user_id, json(verified_state).dump());
                         txn.commit();
                 } catch (std::exception &) {
                 }
+        }
 
         const auto local_user = utils::localUser().toStdString();
         std::map<std::string, VerificationStatus> tmp;
@@ -4086,11 +4154,7 @@ Cache::markDeviceUnverified(const std::string &user_id, const std::string &key)
                         verified_state = json::parse(val);
                 }
 
-                verified_state.device_verified.erase(
+                verified_state.device_verified.erase(key);
-                  std::remove(verified_state.device_verified.begin(),
-                              verified_state.device_verified.end(),
-                              key),
-                  verified_state.device_verified.end());
 
                 db.put(txn, user_id, json(verified_state).dump());
                 txn.commit();
@@ -4119,6 +4183,13 @@ Cache::markDeviceUnverified(const std::string &user_id, const std::string &key)
 
 VerificationStatus
 Cache::verificationStatus(const std::string &user_id)
+{
+        auto txn = ro_txn(env_);
+        return verificationStatus_(user_id, txn);
+}
+
+VerificationStatus
+Cache::verificationStatus_(const std::string &user_id, lmdb::txn &txn)
 {
         std::unique_lock<std::mutex> lock(verification_storage.verification_storage_mtx);
         if (verification_storage.status.count(user_id))
@@ -4126,7 +4197,11 @@ Cache::verificationStatus(const std::string &user_id)
 
         VerificationStatus status;
 
-        if (auto verifCache = verificationCache(user_id)) {
+        // assume there is at least one unverified device until we have checked we have the device
+        // list for that user.
+        status.unverified_device_count = 1;
+
+        if (auto verifCache = verificationCache(user_id, txn)) {
                 status.verified_devices = verifCache->device_verified;
         }
 
@@ -4134,12 +4209,10 @@ Cache::verificationStatus(const std::string &user_id)
 
         crypto::Trust trustlevel = crypto::Trust::Unverified;
         if (user_id == local_user) {
-                status.verified_devices.push_back(http::client()->device_id());
+                status.verified_devices.insert(http::client()->device_id());
                 trustlevel = crypto::Trust::Verified;
         }
 
-        verification_storage.status[user_id] = status;
-
         auto verifyAtLeastOneSig = [](const auto &toVerif,
                                       const std::map<std::string, std::string> &keys,
                                       const std::string &keyOwner) {
@@ -4157,6 +4230,16 @@ Cache::verificationStatus(const std::string &user_id)
                 return false;
         };
 
+        auto updateUnverifiedDevices = [&status](auto &theirDeviceKeys) {
+                int currentVerifiedDevices = 0;
+                for (auto device_id : status.verified_devices) {
+                        if (theirDeviceKeys.count(device_id))
+                                currentVerifiedDevices++;
+                }
+                status.unverified_device_count =
+                  static_cast<int>(theirDeviceKeys.size()) - currentVerifiedDevices;
+        };
+
         try {
                 // for local user verify this device_key -> our master_key -> our self_signing_key
                 // -> our device_keys
@@ -4166,17 +4249,24 @@ Cache::verificationStatus(const std::string &user_id)
                 //
                 // This means verifying the other user adds 2 extra steps,verifying our user_signing
                 // key and their master key
-                auto ourKeys   = userKeys(local_user);
+                auto ourKeys   = userKeys_(local_user, txn);
-                auto theirKeys = userKeys(user_id);
+                auto theirKeys = userKeys_(user_id, txn);
-                if (!ourKeys || !theirKeys)
+                if (!ourKeys || !theirKeys) {
+                        verification_storage.status[user_id] = status;
                         return status;
+                }
+
+                // Update verified devices count to count without cross-signing
+                updateUnverifiedDevices(theirKeys->device_keys);
 
                 if (!mtx::crypto::ed25519_verify_signature(
                       olm::client()->identity_keys().ed25519,
                       json(ourKeys->master_keys),
                       ourKeys->master_keys.signatures.at(local_user)
-                        .at("ed25519:" + http::client()->device_id())))
+                        .at("ed25519:" + http::client()->device_id()))) {
+                        verification_storage.status[user_id] = status;
                         return status;
+                }
 
                 auto master_keys = ourKeys->master_keys.keys;
 
@@ -4191,14 +4281,17 @@ Cache::verificationStatus(const std::string &user_id)
                                 trustlevel = crypto::Trust::Verified;
                         else if (!theirKeys->master_key_changed)
                                 trustlevel = crypto::Trust::TOFU;
-                        else
+                        else {
+                                verification_storage.status[user_id] = status;
                                 return status;
+                        }
 
                         master_keys = theirKeys->master_keys.keys;
                 }
 
                 status.user_verified = trustlevel;
 
+                verification_storage.status[user_id] = status;
                 if (!verifyAtLeastOneSig(theirKeys->self_signing_keys, master_keys, user_id))
                         return status;
 
@@ -4209,16 +4302,19 @@ Cache::verificationStatus(const std::string &user_id)
                                   device_key.keys.at("curve25519:" + device_key.device_id);
                                 if (verifyAtLeastOneSig(
                                       device_key, theirKeys->self_signing_keys.keys, user_id)) {
-                                        status.verified_devices.push_back(device_key.device_id);
+                                        status.verified_devices.insert(device_key.device_id);
                                         status.verified_device_keys[identkey] = trustlevel;
                                 }
                         } catch (...) {
                         }
                 }
 
+                updateUnverifiedDevices(theirKeys->device_keys);
                 verification_storage.status[user_id] = status;
                 return status;
-        } catch (std::exception &) {
+        } catch (std::exception &e) {
+                nhlog::db()->error(
+                  "Failed to calculate verification status of {}: {}", user_id, e.what());
                 return status;
         }
 }

src/CacheCryptoStructs.h

@@ -112,9 +112,11 @@ struct VerificationStatus
         //! True, if the users master key is verified
         crypto::Trust user_verified = crypto::Trust::Unverified;
         //! List of all devices marked as verified
-        std::vector<std::string> verified_devices;
+        std::set<std::string> verified_devices;
         //! Map from sender key/curve25519 to trust status
         std::map<std::string, crypto::Trust> verified_device_keys;
+        //! Count of unverified devices
+        int unverified_device_count = 0;
 };
 
 //! In memory cache of verification status
@@ -154,9 +156,9 @@ from_json(const nlohmann::json &j, UserKeyCache &info);
 struct VerificationCache
 {
         //! list of verified device_ids with device-verification
-        std::vector<std::string> device_verified;
+        std::set<std::string> device_verified;
         //! list of devices the user blocks
-        std::vector<std::string> device_blocked;
+        std::set<std::string> device_blocked;
 };
 
 void

src/Cache_p.h

@@ -46,7 +46,6 @@ public:
         std::string statusMessage(const std::string &user_id);
 
         // user cache stores user keys
-        std::optional<UserKeyCache> userKeys(const std::string &user_id);
         std::map<std::string, std::optional<UserKeyCache>> getMembersWithKeys(
           const std::string &room_id,
           bool verified_only);
@@ -63,9 +62,11 @@ public:
                         std::function<void(const UserKeyCache &, mtx::http::RequestErr)> cb);
 
         // device & user verification cache
+        std::optional<UserKeyCache> userKeys(const std::string &user_id);
         VerificationStatus verificationStatus(const std::string &user_id);
         void markDeviceVerified(const std::string &user_id, const std::string &device);
         void markDeviceUnverified(const std::string &user_id, const std::string &device);
+        crypto::Trust roomVerificationStatus(const std::string &room_id);
 
         std::vector<std::string> joinedRooms();
 
@@ -681,7 +682,10 @@ private:
                 return QString::fromStdString(event.state_key);
         }
 
-        std::optional<VerificationCache> verificationCache(const std::string &user_id);
+        std::optional<VerificationCache> verificationCache(const std::string &user_id,
+                                                           lmdb::txn &txn);
+        VerificationStatus verificationStatus_(const std::string &user_id, lmdb::txn &txn);
+        std::optional<UserKeyCache> userKeys_(const std::string &user_id, lmdb::txn &txn);
 
         void setNextBatchToken(lmdb::txn &txn, const std::string &token);
         void setNextBatchToken(lmdb::txn &txn, const QString &token);

src/timeline/TimelineModel.cpp

@@ -418,6 +418,14 @@ TimelineModel::TimelineModel(TimelineViewManager *manager, QString room_id, QObj
                 &events,
                 &EventStore::enableKeyRequests);
 
+        connect(this, &TimelineModel::encryptionChanged, this, &TimelineModel::trustlevelChanged);
+        connect(
+          this, &TimelineModel::roomMemberCountChanged, this, &TimelineModel::trustlevelChanged);
+        connect(cache::client(),
+                &Cache::verificationStatusChanged,
+                this,
+                &TimelineModel::trustlevelChanged);
+
         showEventTimer.callOnTimeout(this, &TimelineModel::scrollTimerEvent);
 }
 
@@ -1993,6 +2001,15 @@ TimelineModel::roomTopic() const
                   QString::fromStdString(info[room_id_].topic).toHtmlEscaped()));
 }
 
+crypto::Trust
+TimelineModel::trustlevel() const
+{
+        if (!isEncrypted_)
+                return crypto::Trust::Unverified;
+
+        return cache::client()->roomVerificationStatus(room_id_.toStdString());
+}
+
 int
 TimelineModel::roomMemberCount() const
 {

src/timeline/TimelineModel.h

@@ -175,6 +175,7 @@ class TimelineModel : public QAbstractListModel
         Q_PROPERTY(int roomMemberCount READ roomMemberCount NOTIFY roomMemberCountChanged)
         Q_PROPERTY(bool isEncrypted READ isEncrypted NOTIFY encryptionChanged)
         Q_PROPERTY(bool isSpace READ isSpace CONSTANT)
+        Q_PROPERTY(int trustlevel READ trustlevel NOTIFY trustlevelChanged)
         Q_PROPERTY(InputBar *input READ input CONSTANT)
         Q_PROPERTY(Permissions *permissions READ permissions NOTIFY permissionsChanged)
 
@@ -287,6 +288,7 @@ public:
         DescInfo lastMessage() const { return lastMessage_; }
         bool isSpace() const { return isSpace_; }
         bool isEncrypted() const { return isEncrypted_; }
+        crypto::Trust trustlevel() const;
         int roomMemberCount() const;
 
 public slots:
@@ -372,6 +374,7 @@ signals:
         void updateFlowEventId(std::string event_id);
 
         void encryptionChanged();
+        void trustlevelChanged();
         void roomNameChanged();
         void plainRoomNameChanged();
         void roomTopicChanged();