mirror of https://github.com/matrix-org/dendrite
318 lines
10 KiB
Go
318 lines
10 KiB
Go
// 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 routing
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import (
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"net/http"
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"time"
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"github.com/matrix-org/dendrite/clientapi/jsonerror"
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"github.com/matrix-org/dendrite/internal/eventutil"
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"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/gomatrixserverlib"
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"github.com/matrix-org/util"
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"github.com/sirupsen/logrus"
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)
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// MakeLeave implements the /make_leave API
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func MakeLeave(
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httpReq *http.Request,
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request *gomatrixserverlib.FederationRequest,
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cfg *config.FederationAPI,
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rsAPI api.FederationRoomserverAPI,
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roomID, userID string,
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) util.JSONResponse {
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_, domain, err := gomatrixserverlib.SplitID('@', userID)
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if err != nil {
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return util.JSONResponse{
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Code: http.StatusBadRequest,
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JSON: jsonerror.BadJSON("Invalid UserID"),
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}
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}
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if domain != request.Origin() {
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return util.JSONResponse{
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Code: http.StatusForbidden,
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JSON: jsonerror.Forbidden("The leave must be sent by the server of the user"),
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}
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}
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// Try building an event for the server
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builder := gomatrixserverlib.EventBuilder{
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Sender: userID,
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RoomID: roomID,
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Type: "m.room.member",
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StateKey: &userID,
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}
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err = builder.SetContent(map[string]interface{}{"membership": gomatrixserverlib.Leave})
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if err != nil {
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util.GetLogger(httpReq.Context()).WithError(err).Error("builder.SetContent failed")
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return jsonerror.InternalServerError()
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}
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var queryRes api.QueryLatestEventsAndStateResponse
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event, err := eventutil.QueryAndBuildEvent(httpReq.Context(), &builder, cfg.Matrix, time.Now(), rsAPI, &queryRes)
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if err == eventutil.ErrRoomNoExists {
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return util.JSONResponse{
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Code: http.StatusNotFound,
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JSON: jsonerror.NotFound("Room does not exist"),
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}
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} else if e, ok := err.(gomatrixserverlib.BadJSONError); ok {
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return util.JSONResponse{
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Code: http.StatusBadRequest,
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JSON: jsonerror.BadJSON(e.Error()),
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}
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} else if err != nil {
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util.GetLogger(httpReq.Context()).WithError(err).Error("eventutil.BuildEvent failed")
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return jsonerror.InternalServerError()
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}
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// If the user has already left then just return their last leave
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// event. This means that /send_leave will be a no-op, which helps
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// to reject invites multiple times - hopefully.
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for _, state := range queryRes.StateEvents {
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if !state.StateKeyEquals(userID) {
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continue
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}
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if mem, merr := state.Membership(); merr == nil && mem == gomatrixserverlib.Leave {
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return util.JSONResponse{
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Code: http.StatusOK,
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JSON: map[string]interface{}{
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"room_version": event.RoomVersion,
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"event": state,
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},
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}
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}
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}
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// Check that the leave is allowed or not
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stateEvents := make([]*gomatrixserverlib.Event, len(queryRes.StateEvents))
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for i := range queryRes.StateEvents {
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stateEvents[i] = queryRes.StateEvents[i].Event
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}
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provider := gomatrixserverlib.NewAuthEvents(stateEvents)
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if err = gomatrixserverlib.Allowed(event.Event, &provider); err != nil {
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return util.JSONResponse{
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Code: http.StatusForbidden,
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JSON: jsonerror.Forbidden(err.Error()),
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}
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}
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return util.JSONResponse{
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Code: http.StatusOK,
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JSON: map[string]interface{}{
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"room_version": event.RoomVersion,
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"event": builder,
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},
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}
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}
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// SendLeave implements the /send_leave API
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// nolint:gocyclo
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func SendLeave(
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httpReq *http.Request,
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request *gomatrixserverlib.FederationRequest,
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cfg *config.FederationAPI,
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rsAPI api.FederationRoomserverAPI,
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keys gomatrixserverlib.JSONVerifier,
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roomID, eventID string,
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) util.JSONResponse {
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verReq := api.QueryRoomVersionForRoomRequest{RoomID: roomID}
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verRes := api.QueryRoomVersionForRoomResponse{}
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if err := rsAPI.QueryRoomVersionForRoom(httpReq.Context(), &verReq, &verRes); err != nil {
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return util.JSONResponse{
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Code: http.StatusBadRequest,
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JSON: jsonerror.UnsupportedRoomVersion(err.Error()),
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}
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}
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// Decode the event JSON from the request.
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event, err := gomatrixserverlib.NewEventFromUntrustedJSON(request.Content(), verRes.RoomVersion)
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switch err.(type) {
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case gomatrixserverlib.BadJSONError:
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return util.JSONResponse{
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Code: http.StatusBadRequest,
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JSON: jsonerror.BadJSON(err.Error()),
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}
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case nil:
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default:
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return util.JSONResponse{
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Code: http.StatusBadRequest,
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JSON: jsonerror.NotJSON("The request body could not be decoded into valid JSON. " + err.Error()),
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}
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}
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// Check that the room ID is correct.
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if event.RoomID() != roomID {
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return util.JSONResponse{
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Code: http.StatusBadRequest,
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JSON: jsonerror.BadJSON("The room ID in the request path must match the room ID in the leave event JSON"),
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}
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}
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// Check that the event ID is correct.
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if event.EventID() != eventID {
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return util.JSONResponse{
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Code: http.StatusBadRequest,
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JSON: jsonerror.BadJSON("The event ID in the request path must match the event ID in the leave event JSON"),
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}
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}
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if event.StateKey() == nil || event.StateKeyEquals("") {
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return util.JSONResponse{
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Code: http.StatusBadRequest,
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JSON: jsonerror.BadJSON("No state key was provided in the leave event."),
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}
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}
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if !event.StateKeyEquals(event.Sender()) {
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return util.JSONResponse{
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Code: http.StatusBadRequest,
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JSON: jsonerror.BadJSON("Event state key must match the event sender."),
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}
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}
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// Check that the sender belongs to the server that is sending us
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// the request. By this point we've already asserted that the sender
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// and the state key are equal so we don't need to check both.
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var serverName gomatrixserverlib.ServerName
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if _, serverName, err = gomatrixserverlib.SplitID('@', event.Sender()); err != nil {
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return util.JSONResponse{
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Code: http.StatusForbidden,
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JSON: jsonerror.Forbidden("The sender of the join is invalid"),
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}
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} else if serverName != request.Origin() {
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return util.JSONResponse{
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Code: http.StatusForbidden,
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JSON: jsonerror.Forbidden("The sender does not match the server that originated the request"),
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}
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}
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// Check if the user has already left. If so, no-op!
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queryReq := &api.QueryLatestEventsAndStateRequest{
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RoomID: roomID,
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StateToFetch: []gomatrixserverlib.StateKeyTuple{
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{
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EventType: gomatrixserverlib.MRoomMember,
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StateKey: *event.StateKey(),
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},
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},
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}
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queryRes := &api.QueryLatestEventsAndStateResponse{}
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err = rsAPI.QueryLatestEventsAndState(httpReq.Context(), queryReq, queryRes)
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if err != nil {
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util.GetLogger(httpReq.Context()).WithError(err).Error("rsAPI.QueryLatestEventsAndState failed")
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return jsonerror.InternalServerError()
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}
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// The room doesn't exist or we weren't ever joined to it. Might as well
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// no-op here.
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if !queryRes.RoomExists || len(queryRes.StateEvents) == 0 {
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return util.JSONResponse{
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Code: http.StatusOK,
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JSON: struct{}{},
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}
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}
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// Check if we're recycling a previous leave event.
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if event.EventID() == queryRes.StateEvents[0].EventID() {
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return util.JSONResponse{
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Code: http.StatusOK,
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JSON: struct{}{},
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}
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}
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// We are/were joined/invited/banned or something. Check if
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// we can no-op here.
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if len(queryRes.StateEvents) == 1 {
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if mem, merr := queryRes.StateEvents[0].Membership(); merr == nil && mem == gomatrixserverlib.Leave {
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return util.JSONResponse{
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Code: http.StatusOK,
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JSON: struct{}{},
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}
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}
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}
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// Check that the event is signed by the server sending the request.
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redacted, err := gomatrixserverlib.RedactEventJSON(event.JSON(), event.Version())
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if err != nil {
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logrus.WithError(err).Errorf("XXX: leave.go")
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return util.JSONResponse{
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Code: http.StatusBadRequest,
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JSON: jsonerror.BadJSON("The event JSON could not be redacted"),
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}
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}
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verifyRequests := []gomatrixserverlib.VerifyJSONRequest{{
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ServerName: serverName,
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Message: redacted,
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AtTS: event.OriginServerTS(),
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StrictValidityChecking: true,
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}}
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verifyResults, err := keys.VerifyJSONs(httpReq.Context(), verifyRequests)
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if err != nil {
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util.GetLogger(httpReq.Context()).WithError(err).Error("keys.VerifyJSONs failed")
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return jsonerror.InternalServerError()
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}
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if verifyResults[0].Error != nil {
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return util.JSONResponse{
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Code: http.StatusForbidden,
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JSON: jsonerror.Forbidden("The leave must be signed by the server it originated on"),
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}
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}
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// check membership is set to leave
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mem, err := event.Membership()
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if err != nil {
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util.GetLogger(httpReq.Context()).WithError(err).Error("event.Membership failed")
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return util.JSONResponse{
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Code: http.StatusBadRequest,
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JSON: jsonerror.BadJSON("missing content.membership key"),
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}
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}
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if mem != gomatrixserverlib.Leave {
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return util.JSONResponse{
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Code: http.StatusBadRequest,
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JSON: jsonerror.BadJSON("The membership in the event content must be set to leave"),
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}
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}
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// Send the events to the room server.
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// We are responsible for notifying other servers that the user has left
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// the room, so set SendAsServer to cfg.Matrix.ServerName
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var response api.InputRoomEventsResponse
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if err := rsAPI.InputRoomEvents(httpReq.Context(), &api.InputRoomEventsRequest{
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InputRoomEvents: []api.InputRoomEvent{
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{
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Kind: api.KindNew,
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Event: event.Headered(verRes.RoomVersion),
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SendAsServer: string(cfg.Matrix.ServerName),
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TransactionID: nil,
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},
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},
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}, &response); err != nil {
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return jsonerror.InternalAPIError(httpReq.Context(), err)
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}
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if response.ErrMsg != "" {
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util.GetLogger(httpReq.Context()).WithField(logrus.ErrorKey, response.ErrMsg).WithField("not_allowed", response.NotAllowed).Error("producer.SendEvents failed")
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if response.NotAllowed {
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return util.JSONResponse{
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Code: http.StatusBadRequest,
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JSON: jsonerror.Forbidden(response.ErrMsg),
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}
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}
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return jsonerror.InternalServerError()
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}
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return util.JSONResponse{
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Code: http.StatusOK,
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JSON: struct{}{},
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}
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}
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