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/setup/config"
"github.com/matrix-org/gomatrixserverlib"
)
type Admin struct {
DB storage.Database
Cfg *config.RoomServer
Queryer *query.Queryer
Inputer *input.Inputer
Leaver *Leaver
}
// PerformEvacuateRoom will remove all local users from the given room.
func (r *Admin) PerformAdminEvacuateRoom(
ctx context.Context,
req *api.PerformAdminEvacuateRoomRequest,
res *api.PerformAdminEvacuateRoomResponse,
) error {
roomInfo, err := r.DB.RoomInfo(ctx, req.RoomID)
if err != nil {
res.Error = &api.PerformError{
Code: api.PerformErrorBadRequest,
Msg: fmt.Sprintf("r.DB.RoomInfo: %s", err),
}
return nil
}
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if roomInfo == nil || roomInfo.IsStub() {
res.Error = &api.PerformError{
Code: api.PerformErrorNoRoom,
Msg: fmt.Sprintf("Room %s not found", req.RoomID),
}
return nil
}
memberNIDs, err := r.DB.GetMembershipEventNIDsForRoom(ctx, roomInfo.RoomNID, true, true)
if err != nil {
res.Error = &api.PerformError{
Code: api.PerformErrorBadRequest,
Msg: fmt.Sprintf("r.DB.GetMembershipEventNIDsForRoom: %s", err),
}
return nil
}
memberEvents, err := r.DB.Events(ctx, memberNIDs)
if err != nil {
res.Error = &api.PerformError{
Code: api.PerformErrorBadRequest,
Msg: fmt.Sprintf("r.DB.Events: %s", err),
}
return nil
}
inputEvents := make([]api.InputRoomEvent, 0, len(memberEvents))
res.Affected = make([]string, 0, len(memberEvents))
latestReq := &api.QueryLatestEventsAndStateRequest{
RoomID: req.RoomID,
}
latestRes := &api.QueryLatestEventsAndStateResponse{}
if err = r.Queryer.QueryLatestEventsAndState(ctx, latestReq, latestRes); err != nil {
res.Error = &api.PerformError{
Code: api.PerformErrorBadRequest,
Msg: fmt.Sprintf("r.Queryer.QueryLatestEventsAndState: %s", err),
}
return nil
}
prevEvents := latestRes.LatestEvents
for _, memberEvent := range memberEvents {
if memberEvent.StateKey() == nil {
continue
}
var memberContent gomatrixserverlib.MemberContent
if err = json.Unmarshal(memberEvent.Content(), &memberContent); err != nil {
res.Error = &api.PerformError{
Code: api.PerformErrorBadRequest,
Msg: fmt.Sprintf("json.Unmarshal: %s", err),
}
return nil
}
memberContent.Membership = gomatrixserverlib.Leave
stateKey := *memberEvent.StateKey()
fledglingEvent := &gomatrixserverlib.EventBuilder{
RoomID: req.RoomID,
Type: gomatrixserverlib.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 {
res.Error = &api.PerformError{
Code: api.PerformErrorBadRequest,
Msg: fmt.Sprintf("json.Marshal: %s", err),
}
return nil
}
eventsNeeded, err := gomatrixserverlib.StateNeededForEventBuilder(fledglingEvent)
if err != nil {
res.Error = &api.PerformError{
Code: api.PerformErrorBadRequest,
Msg: fmt.Sprintf("gomatrixserverlib.StateNeededForEventBuilder: %s", err),
}
return nil
}
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identity, err := r.Cfg.Matrix.SigningIdentityFor(senderDomain)
if err != nil {
continue
}
event, err := eventutil.BuildEvent(ctx, fledglingEvent, r.Cfg.Matrix, identity, time.Now(), &eventsNeeded, latestRes)
if err != nil {
res.Error = &api.PerformError{
Code: api.PerformErrorBadRequest,
Msg: fmt.Sprintf("eventutil.BuildEvent: %s", err),
}
return nil
}
inputEvents = append(inputEvents, api.InputRoomEvent{
Kind: api.KindNew,
Event: event,
Origin: senderDomain,
SendAsServer: string(senderDomain),
})
res.Affected = append(res.Affected, stateKey)
prevEvents = []gomatrixserverlib.EventReference{
event.EventReference(),
}
}
inputReq := &api.InputRoomEventsRequest{
InputRoomEvents: inputEvents,
Asynchronous: true,
}
inputRes := &api.InputRoomEventsResponse{}
return r.Inputer.InputRoomEvents(ctx, inputReq, inputRes)
}
func (r *Admin) PerformAdminEvacuateUser(
ctx context.Context,
req *api.PerformAdminEvacuateUserRequest,
res *api.PerformAdminEvacuateUserResponse,
) error {
_, domain, err := gomatrixserverlib.SplitID('@', req.UserID)
if err != nil {
res.Error = &api.PerformError{
Code: api.PerformErrorBadRequest,
Msg: fmt.Sprintf("Malformed user ID: %s", err),
}
return nil
}
if !r.Cfg.Matrix.IsLocalServerName(domain) {
res.Error = &api.PerformError{
Code: api.PerformErrorBadRequest,
Msg: "Can only evacuate local users using this endpoint",
}
return nil
}
roomIDs, err := r.DB.GetRoomsByMembership(ctx, req.UserID, gomatrixserverlib.Join)
if err != nil && err != sql.ErrNoRows {
res.Error = &api.PerformError{
Code: api.PerformErrorBadRequest,
Msg: fmt.Sprintf("r.DB.GetRoomsByMembership: %s", err),
}
return nil
}
inviteRoomIDs, err := r.DB.GetRoomsByMembership(ctx, req.UserID, gomatrixserverlib.Invite)
if err != nil && err != sql.ErrNoRows {
res.Error = &api.PerformError{
Code: api.PerformErrorBadRequest,
Msg: fmt.Sprintf("r.DB.GetRoomsByMembership: %s", err),
}
return nil
}
for _, roomID := range append(roomIDs, inviteRoomIDs...) {
leaveReq := &api.PerformLeaveRequest{
RoomID: roomID,
UserID: req.UserID,
}
leaveRes := &api.PerformLeaveResponse{}
outputEvents, err := r.Leaver.PerformLeave(ctx, leaveReq, leaveRes)
if err != nil {
res.Error = &api.PerformError{
Code: api.PerformErrorBadRequest,
Msg: fmt.Sprintf("r.Leaver.PerformLeave: %s", err),
}
return nil
}
if len(outputEvents) == 0 {
continue
}
if err := r.Inputer.OutputProducer.ProduceRoomEvents(roomID, outputEvents); err != nil {
res.Error = &api.PerformError{
Code: api.PerformErrorBadRequest,
Msg: fmt.Sprintf("r.Inputer.WriteOutputEvents: %s", err),
}
return nil
}
res.Affected = append(res.Affected, roomID)
}
return nil
}
func (r *Admin) PerformAdminDownloadState(
ctx context.Context,
req *api.PerformAdminDownloadStateRequest,
res *api.PerformAdminDownloadStateResponse,
) error {
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_, senderDomain, err := r.Cfg.Matrix.SplitLocalID('@', req.UserID)
if err != nil {
res.Error = &api.PerformError{
Code: api.PerformErrorBadRequest,
Msg: fmt.Sprintf("r.Cfg.Matrix.SplitLocalID: %s", err),
}
return nil
}
roomInfo, err := r.DB.RoomInfo(ctx, req.RoomID)
if err != nil {
res.Error = &api.PerformError{
Code: api.PerformErrorBadRequest,
Msg: fmt.Sprintf("r.DB.RoomInfo: %s", err),
}
return nil
}
if roomInfo == nil || roomInfo.IsStub() {
res.Error = &api.PerformError{
Code: api.PerformErrorBadRequest,
Msg: fmt.Sprintf("room %q not found", req.RoomID),
}
return nil
}
fwdExtremities, _, depth, err := r.DB.LatestEventIDs(ctx, roomInfo.RoomNID)
if err != nil {
res.Error = &api.PerformError{
Code: api.PerformErrorBadRequest,
Msg: fmt.Sprintf("r.DB.LatestEventIDs: %s", err),
}
return nil
}
authEventMap := map[string]*gomatrixserverlib.Event{}
stateEventMap := map[string]*gomatrixserverlib.Event{}
for _, fwdExtremity := range fwdExtremities {
var state gomatrixserverlib.RespState
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state, err = r.Inputer.FSAPI.LookupState(ctx, r.Inputer.ServerName, req.ServerName, req.RoomID, fwdExtremity.EventID, roomInfo.RoomVersion)
if err != nil {
res.Error = &api.PerformError{
Code: api.PerformErrorBadRequest,
Msg: fmt.Sprintf("r.Inputer.FSAPI.LookupState (%q): %s", fwdExtremity.EventID, err),
}
return nil
}
for _, authEvent := range state.AuthEvents.UntrustedEvents(roomInfo.RoomVersion) {
if err = authEvent.VerifyEventSignatures(ctx, r.Inputer.KeyRing); err != nil {
continue
}
authEventMap[authEvent.EventID()] = authEvent
}
for _, stateEvent := range state.StateEvents.UntrustedEvents(roomInfo.RoomVersion) {
if err = stateEvent.VerifyEventSignatures(ctx, r.Inputer.KeyRing); err != nil {
continue
}
stateEventMap[stateEvent.EventID()] = stateEvent
}
}
authEvents := make([]*gomatrixserverlib.HeaderedEvent, 0, len(authEventMap))
stateEvents := make([]*gomatrixserverlib.HeaderedEvent, 0, len(stateEventMap))
stateIDs := make([]string, 0, len(stateEventMap))
for _, authEvent := range authEventMap {
authEvents = append(authEvents, authEvent.Headered(roomInfo.RoomVersion))
}
for _, stateEvent := range stateEventMap {
stateEvents = append(stateEvents, stateEvent.Headered(roomInfo.RoomVersion))
stateIDs = append(stateIDs, stateEvent.EventID())
}
builder := &gomatrixserverlib.EventBuilder{
Type: "org.matrix.dendrite.state_download",
Sender: req.UserID,
RoomID: req.RoomID,
Content: gomatrixserverlib.RawJSON("{}"),
}
eventsNeeded, err := gomatrixserverlib.StateNeededForEventBuilder(builder)
if err != nil {
res.Error = &api.PerformError{
Code: api.PerformErrorBadRequest,
Msg: fmt.Sprintf("gomatrixserverlib.StateNeededForEventBuilder: %s", err),
}
return nil
}
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 {
res.Error = &api.PerformError{
Code: api.PerformErrorBadRequest,
Msg: fmt.Sprintf("eventutil.BuildEvent: %s", err),
}
return nil
}
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 {
res.Error = &api.PerformError{
Code: api.PerformErrorBadRequest,
Msg: fmt.Sprintf("r.Inputer.InputRoomEvents: %s", err),
}
return nil
}
if inputRes.ErrMsg != "" {
res.Error = &api.PerformError{
Code: api.PerformErrorBadRequest,
Msg: inputRes.ErrMsg,
}
}
return nil
}