mirror of
https://github.com/matrix-org/dendrite
synced 2024-12-15 10:43:45 +01:00
213 lines
6.8 KiB
Go
213 lines
6.8 KiB
Go
// Copyright 2020 The Matrix.org Foundation C.I.C.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package consumers
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import (
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"context"
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"encoding/json"
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"github.com/matrix-org/dendrite/federationapi/queue"
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"github.com/matrix-org/dendrite/federationapi/storage"
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"github.com/matrix-org/dendrite/federationapi/types"
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"github.com/matrix-org/dendrite/keyserver/api"
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roomserverAPI "github.com/matrix-org/dendrite/roomserver/api"
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"github.com/matrix-org/dendrite/setup/config"
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"github.com/matrix-org/dendrite/setup/jetstream"
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"github.com/matrix-org/dendrite/setup/process"
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"github.com/matrix-org/gomatrixserverlib"
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"github.com/nats-io/nats.go"
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"github.com/sirupsen/logrus"
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)
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// KeyChangeConsumer consumes events that originate in key server.
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type KeyChangeConsumer struct {
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ctx context.Context
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jetstream nats.JetStreamContext
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durable string
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db storage.Database
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queues *queue.OutgoingQueues
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serverName gomatrixserverlib.ServerName
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rsAPI roomserverAPI.FederationRoomserverAPI
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topic string
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}
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// NewKeyChangeConsumer creates a new KeyChangeConsumer. Call Start() to begin consuming from key servers.
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func NewKeyChangeConsumer(
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process *process.ProcessContext,
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cfg *config.KeyServer,
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js nats.JetStreamContext,
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queues *queue.OutgoingQueues,
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store storage.Database,
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rsAPI roomserverAPI.FederationRoomserverAPI,
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) *KeyChangeConsumer {
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return &KeyChangeConsumer{
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ctx: process.Context(),
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jetstream: js,
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durable: cfg.Matrix.JetStream.Prefixed("FederationAPIKeyChangeConsumer"),
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topic: cfg.Matrix.JetStream.Prefixed(jetstream.OutputKeyChangeEvent),
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queues: queues,
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db: store,
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serverName: cfg.Matrix.ServerName,
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rsAPI: rsAPI,
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}
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}
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// Start consuming from key servers
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func (t *KeyChangeConsumer) Start() error {
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return jetstream.JetStreamConsumer(
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t.ctx, t.jetstream, t.topic, t.durable, 1,
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t.onMessage, nats.DeliverAll(), nats.ManualAck(),
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)
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}
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// onMessage is called in response to a message received on the
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// key change events topic from the key server.
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func (t *KeyChangeConsumer) onMessage(ctx context.Context, msgs []*nats.Msg) bool {
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msg := msgs[0] // Guaranteed to exist if onMessage is called
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var m api.DeviceMessage
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if err := json.Unmarshal(msg.Data, &m); err != nil {
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logrus.WithError(err).Errorf("failed to read device message from key change topic")
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return true
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}
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if m.DeviceKeys == nil && m.OutputCrossSigningKeyUpdate == nil {
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// This probably shouldn't happen but stops us from panicking if we come
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// across an update that doesn't satisfy either types.
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return true
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}
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switch m.Type {
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case api.TypeCrossSigningUpdate:
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return t.onCrossSigningMessage(m)
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case api.TypeDeviceKeyUpdate:
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fallthrough
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default:
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return t.onDeviceKeyMessage(m)
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}
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}
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func (t *KeyChangeConsumer) onDeviceKeyMessage(m api.DeviceMessage) bool {
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if m.DeviceKeys == nil {
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return true
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}
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logger := logrus.WithField("user_id", m.UserID)
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// only send key change events which originated from us
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_, originServerName, err := gomatrixserverlib.SplitID('@', m.UserID)
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if err != nil {
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logger.WithError(err).Error("Failed to extract domain from key change event")
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return true
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}
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if originServerName != t.serverName {
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return true
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}
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var queryRes roomserverAPI.QueryRoomsForUserResponse
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err = t.rsAPI.QueryRoomsForUser(t.ctx, &roomserverAPI.QueryRoomsForUserRequest{
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UserID: m.UserID,
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WantMembership: "join",
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}, &queryRes)
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if err != nil {
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logger.WithError(err).Error("failed to calculate joined rooms for user")
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return true
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}
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// send this key change to all servers who share rooms with this user.
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destinations, err := t.db.GetJoinedHostsForRooms(t.ctx, queryRes.RoomIDs, true)
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if err != nil {
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logger.WithError(err).Error("failed to calculate joined hosts for rooms user is in")
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return true
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}
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if len(destinations) == 0 {
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return true
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}
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// Pack the EDU and marshal it
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edu := &gomatrixserverlib.EDU{
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Type: gomatrixserverlib.MDeviceListUpdate,
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Origin: string(t.serverName),
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}
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event := gomatrixserverlib.DeviceListUpdateEvent{
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UserID: m.UserID,
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DeviceID: m.DeviceID,
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DeviceDisplayName: m.DisplayName,
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StreamID: m.StreamID,
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PrevID: prevID(m.StreamID),
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Deleted: len(m.KeyJSON) == 0,
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Keys: m.KeyJSON,
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}
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if edu.Content, err = json.Marshal(event); err != nil {
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logger.WithError(err).Error("failed to marshal EDU JSON")
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return true
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}
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logger.Debugf("Sending device list update message to %q", destinations)
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err = t.queues.SendEDU(edu, t.serverName, destinations)
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return err == nil
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}
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func (t *KeyChangeConsumer) onCrossSigningMessage(m api.DeviceMessage) bool {
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output := m.CrossSigningKeyUpdate
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_, host, err := gomatrixserverlib.SplitID('@', output.UserID)
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if err != nil {
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logrus.WithError(err).Errorf("fedsender key change consumer: user ID parse failure")
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return true
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}
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if host != gomatrixserverlib.ServerName(t.serverName) {
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// Ignore any messages that didn't originate locally, otherwise we'll
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// end up parroting information we received from other servers.
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return true
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}
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logger := logrus.WithField("user_id", output.UserID)
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var queryRes roomserverAPI.QueryRoomsForUserResponse
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err = t.rsAPI.QueryRoomsForUser(t.ctx, &roomserverAPI.QueryRoomsForUserRequest{
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UserID: output.UserID,
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WantMembership: "join",
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}, &queryRes)
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if err != nil {
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logger.WithError(err).Error("fedsender key change consumer: failed to calculate joined rooms for user")
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return true
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}
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// send this key change to all servers who share rooms with this user.
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destinations, err := t.db.GetJoinedHostsForRooms(t.ctx, queryRes.RoomIDs, true)
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if err != nil {
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logger.WithError(err).Error("fedsender key change consumer: failed to calculate joined hosts for rooms user is in")
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return true
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}
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if len(destinations) == 0 {
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return true
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}
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// Pack the EDU and marshal it
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edu := &gomatrixserverlib.EDU{
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Type: types.MSigningKeyUpdate,
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Origin: string(t.serverName),
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}
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if edu.Content, err = json.Marshal(output); err != nil {
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logger.WithError(err).Error("fedsender key change consumer: failed to marshal output, dropping")
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return true
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}
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logger.Debugf("Sending cross-signing update message to %q", destinations)
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err = t.queues.SendEDU(edu, t.serverName, destinations)
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return err == nil
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}
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func prevID(streamID int64) []int64 {
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if streamID <= 1 {
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return nil
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}
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return []int64{streamID - 1}
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}
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