dendrite/roomserver/internal/perform/perform_admin.go

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// Copyright 2022 The Matrix.org Foundation C.I.C.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package perform
import (
"context"
"database/sql"
"encoding/json"
"fmt"
"time"
"github.com/matrix-org/dendrite/internal/eventutil"
"github.com/matrix-org/dendrite/roomserver/api"
"github.com/matrix-org/dendrite/roomserver/internal/input"
"github.com/matrix-org/dendrite/roomserver/internal/query"
"github.com/matrix-org/dendrite/roomserver/storage"
"github.com/matrix-org/dendrite/roomserver/types"
"github.com/matrix-org/dendrite/setup/config"
"github.com/matrix-org/gomatrixserverlib"
"github.com/matrix-org/gomatrixserverlib/fclient"
"github.com/matrix-org/gomatrixserverlib/spec"
"github.com/sirupsen/logrus"
)
type Admin struct {
DB storage.Database
Cfg *config.RoomServer
Queryer *query.Queryer
Inputer *input.Inputer
Leaver *Leaver
}
// PerformAdminEvacuateRoom will remove all local users from the given room.
func (r *Admin) PerformAdminEvacuateRoom(
ctx context.Context,
roomID string,
) (affected []string, err error) {
roomInfo, err := r.DB.RoomInfo(ctx, roomID)
if err != nil {
return nil, err
}
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if roomInfo == nil || roomInfo.IsStub() {
return nil, eventutil.ErrRoomNoExists
}
memberNIDs, err := r.DB.GetMembershipEventNIDsForRoom(ctx, roomInfo.RoomNID, true, true)
if err != nil {
return nil, err
}
memberEvents, err := r.DB.Events(ctx, roomInfo, memberNIDs)
if err != nil {
return nil, err
}
inputEvents := make([]api.InputRoomEvent, 0, len(memberEvents))
affected = make([]string, 0, len(memberEvents))
latestReq := &api.QueryLatestEventsAndStateRequest{
RoomID: roomID,
}
latestRes := &api.QueryLatestEventsAndStateResponse{}
if err = r.Queryer.QueryLatestEventsAndState(ctx, latestReq, latestRes); err != nil {
return nil, err
}
prevEvents := latestRes.LatestEvents
var senderDomain spec.ServerName
var eventsNeeded gomatrixserverlib.StateNeeded
var identity *fclient.SigningIdentity
var event *types.HeaderedEvent
for _, memberEvent := range memberEvents {
if memberEvent.StateKey() == nil {
continue
}
var memberContent gomatrixserverlib.MemberContent
if err = json.Unmarshal(memberEvent.Content(), &memberContent); err != nil {
return nil, err
}
memberContent.Membership = spec.Leave
stateKey := *memberEvent.StateKey()
fledglingEvent := &gomatrixserverlib.EventBuilder{
RoomID: roomID,
Type: spec.MRoomMember,
StateKey: &stateKey,
Sender: stateKey,
PrevEvents: prevEvents,
}
_, senderDomain, err = gomatrixserverlib.SplitID('@', fledglingEvent.Sender)
if err != nil {
continue
}
if fledglingEvent.Content, err = json.Marshal(memberContent); err != nil {
return nil, err
}
eventsNeeded, err = gomatrixserverlib.StateNeededForEventBuilder(fledglingEvent)
if err != nil {
return nil, err
}
identity, err = r.Cfg.Matrix.SigningIdentityFor(senderDomain)
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if err != nil {
continue
}
event, err = eventutil.BuildEvent(ctx, fledglingEvent, r.Cfg.Matrix, identity, time.Now(), &eventsNeeded, latestRes)
if err != nil {
return nil, err
}
inputEvents = append(inputEvents, api.InputRoomEvent{
Kind: api.KindNew,
Event: event,
Origin: senderDomain,
SendAsServer: string(senderDomain),
})
affected = append(affected, stateKey)
prevEvents = []gomatrixserverlib.EventReference{
event.EventReference(),
}
}
inputReq := &api.InputRoomEventsRequest{
InputRoomEvents: inputEvents,
Asynchronous: true,
}
inputRes := &api.InputRoomEventsResponse{}
err = r.Inputer.InputRoomEvents(ctx, inputReq, inputRes)
return affected, err
}
// PerformAdminEvacuateUser will remove the given user from all rooms.
func (r *Admin) PerformAdminEvacuateUser(
ctx context.Context,
userID string,
) (affected []string, err error) {
_, domain, err := gomatrixserverlib.SplitID('@', userID)
if err != nil {
return nil, err
}
if !r.Cfg.Matrix.IsLocalServerName(domain) {
return nil, fmt.Errorf("can only evacuate local users using this endpoint")
}
roomIDs, err := r.DB.GetRoomsByMembership(ctx, userID, spec.Join)
if err != nil {
return nil, err
}
inviteRoomIDs, err := r.DB.GetRoomsByMembership(ctx, userID, spec.Invite)
if err != nil && err != sql.ErrNoRows {
return nil, err
}
allRooms := append(roomIDs, inviteRoomIDs...)
affected = make([]string, 0, len(allRooms))
for _, roomID := range allRooms {
leaveReq := &api.PerformLeaveRequest{
RoomID: roomID,
UserID: userID,
}
leaveRes := &api.PerformLeaveResponse{}
outputEvents, err := r.Leaver.PerformLeave(ctx, leaveReq, leaveRes)
if err != nil {
return nil, err
}
affected = append(affected, roomID)
if len(outputEvents) == 0 {
continue
}
if err := r.Inputer.OutputProducer.ProduceRoomEvents(roomID, outputEvents); err != nil {
return nil, err
}
}
return affected, nil
}
// PerformAdminPurgeRoom removes all traces for the given room from the database.
func (r *Admin) PerformAdminPurgeRoom(
ctx context.Context,
roomID string,
) error {
// Validate we actually got a room ID and nothing else
if _, _, err := gomatrixserverlib.SplitID('!', roomID); err != nil {
return err
}
// Evacuate the room before purging it from the database
if _, err := r.PerformAdminEvacuateRoom(ctx, roomID); err != nil {
logrus.WithField("room_id", roomID).WithError(err).Warn("Failed to evacuate room before purging")
return err
}
logrus.WithField("room_id", roomID).Warn("Purging room from roomserver")
if err := r.DB.PurgeRoom(ctx, roomID); err != nil {
logrus.WithField("room_id", roomID).WithError(err).Warn("Failed to purge room from roomserver")
return err
}
logrus.WithField("room_id", roomID).Warn("Room purged from roomserver")
return r.Inputer.OutputProducer.ProduceRoomEvents(roomID, []api.OutputEvent{
{
Type: api.OutputTypePurgeRoom,
PurgeRoom: &api.OutputPurgeRoom{
RoomID: roomID,
},
},
})
}
func (r *Admin) PerformAdminDownloadState(
ctx context.Context,
roomID, userID string, serverName spec.ServerName,
) error {
_, senderDomain, err := r.Cfg.Matrix.SplitLocalID('@', userID)
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if err != nil {
return err
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}
roomInfo, err := r.DB.RoomInfo(ctx, roomID)
if err != nil {
return err
}
if roomInfo == nil || roomInfo.IsStub() {
return eventutil.ErrRoomNoExists
}
fwdExtremities, _, depth, err := r.DB.LatestEventIDs(ctx, roomInfo.RoomNID)
if err != nil {
return err
}
authEventMap := map[string]*gomatrixserverlib.Event{}
stateEventMap := map[string]*gomatrixserverlib.Event{}
for _, fwdExtremity := range fwdExtremities {
var state gomatrixserverlib.StateResponse
state, err = r.Inputer.FSAPI.LookupState(ctx, r.Inputer.ServerName, serverName, roomID, fwdExtremity.EventID, roomInfo.RoomVersion)
if err != nil {
return fmt.Errorf("r.Inputer.FSAPI.LookupState (%q): %s", fwdExtremity.EventID, err)
}
for _, authEvent := range state.GetAuthEvents().UntrustedEvents(roomInfo.RoomVersion) {
if err = gomatrixserverlib.VerifyEventSignatures(ctx, authEvent, r.Inputer.KeyRing); err != nil {
continue
}
authEventMap[authEvent.EventID()] = authEvent
}
for _, stateEvent := range state.GetStateEvents().UntrustedEvents(roomInfo.RoomVersion) {
if err = gomatrixserverlib.VerifyEventSignatures(ctx, stateEvent, r.Inputer.KeyRing); err != nil {
continue
}
stateEventMap[stateEvent.EventID()] = stateEvent
}
}
authEvents := make([]*types.HeaderedEvent, 0, len(authEventMap))
stateEvents := make([]*types.HeaderedEvent, 0, len(stateEventMap))
stateIDs := make([]string, 0, len(stateEventMap))
for _, authEvent := range authEventMap {
authEvents = append(authEvents, &types.HeaderedEvent{Event: authEvent})
}
for _, stateEvent := range stateEventMap {
stateEvents = append(stateEvents, &types.HeaderedEvent{Event: stateEvent})
stateIDs = append(stateIDs, stateEvent.EventID())
}
builder := &gomatrixserverlib.EventBuilder{
Type: "org.matrix.dendrite.state_download",
Sender: userID,
RoomID: roomID,
Content: spec.RawJSON("{}"),
}
eventsNeeded, err := gomatrixserverlib.StateNeededForEventBuilder(builder)
if err != nil {
return fmt.Errorf("gomatrixserverlib.StateNeededForEventBuilder: %w", err)
}
queryRes := &api.QueryLatestEventsAndStateResponse{
RoomExists: true,
RoomVersion: roomInfo.RoomVersion,
LatestEvents: fwdExtremities,
StateEvents: stateEvents,
Depth: depth,
}
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identity, err := r.Cfg.Matrix.SigningIdentityFor(senderDomain)
if err != nil {
return err
}
ev, err := eventutil.BuildEvent(ctx, builder, r.Cfg.Matrix, identity, time.Now(), &eventsNeeded, queryRes)
if err != nil {
return fmt.Errorf("eventutil.BuildEvent: %w", err)
}
inputReq := &api.InputRoomEventsRequest{
Asynchronous: false,
}
inputRes := &api.InputRoomEventsResponse{}
for _, authEvent := range append(authEvents, stateEvents...) {
inputReq.InputRoomEvents = append(inputReq.InputRoomEvents, api.InputRoomEvent{
Kind: api.KindOutlier,
Event: authEvent,
})
}
inputReq.InputRoomEvents = append(inputReq.InputRoomEvents, api.InputRoomEvent{
Kind: api.KindNew,
Event: ev,
Origin: r.Cfg.Matrix.ServerName,
HasState: true,
StateEventIDs: stateIDs,
SendAsServer: string(r.Cfg.Matrix.ServerName),
})
if err = r.Inputer.InputRoomEvents(ctx, inputReq, inputRes); err != nil {
return fmt.Errorf("r.Inputer.InputRoomEvents: %w", err)
}
if inputRes.ErrMsg != "" {
return inputRes.Err()
}
return nil
}