383 lines
12 KiB
Go
383 lines
12 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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"fmt"
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"net/http"
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"time"
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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/roomserver/types"
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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/gomatrixserverlib/fclient"
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"github.com/matrix-org/gomatrixserverlib/spec"
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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 *fclient.FederationRequest,
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cfg *config.FederationAPI,
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rsAPI api.FederationRoomserverAPI,
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roomID spec.RoomID, userID spec.UserID,
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) util.JSONResponse {
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roomVersion, err := rsAPI.QueryRoomVersionForRoom(httpReq.Context(), roomID.String())
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if err != nil {
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util.GetLogger(httpReq.Context()).WithError(err).Error("failed obtaining room version")
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return util.JSONResponse{
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Code: http.StatusInternalServerError,
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JSON: spec.InternalServerError{},
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}
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}
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req := api.QueryServerJoinedToRoomRequest{
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ServerName: request.Destination(),
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RoomID: roomID.String(),
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}
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res := api.QueryServerJoinedToRoomResponse{}
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if err = rsAPI.QueryServerJoinedToRoom(httpReq.Context(), &req, &res); err != nil {
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util.GetLogger(httpReq.Context()).WithError(err).Error("rsAPI.QueryServerJoinedToRoom failed")
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return util.JSONResponse{
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Code: http.StatusInternalServerError,
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JSON: spec.InternalServerError{},
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}
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}
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createLeaveTemplate := func(proto *gomatrixserverlib.ProtoEvent) (gomatrixserverlib.PDU, []gomatrixserverlib.PDU, error) {
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identity, signErr := cfg.Matrix.SigningIdentityFor(request.Destination())
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if signErr != nil {
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util.GetLogger(httpReq.Context()).WithError(signErr).Errorf("obtaining signing identity for %s failed", request.Destination())
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return nil, nil, spec.NotFound(fmt.Sprintf("Server name %q does not exist", request.Destination()))
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}
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queryRes := api.QueryLatestEventsAndStateResponse{}
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event, buildErr := eventutil.QueryAndBuildEvent(httpReq.Context(), proto, identity, time.Now(), rsAPI, &queryRes)
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switch e := buildErr.(type) {
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case nil:
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case eventutil.ErrRoomNoExists:
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util.GetLogger(httpReq.Context()).WithError(buildErr).Error("eventutil.BuildEvent failed")
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return nil, nil, spec.NotFound("Room does not exist")
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case gomatrixserverlib.BadJSONError:
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util.GetLogger(httpReq.Context()).WithError(buildErr).Error("eventutil.BuildEvent failed")
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return nil, nil, spec.BadJSON(e.Error())
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default:
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util.GetLogger(httpReq.Context()).WithError(buildErr).Error("eventutil.BuildEvent failed")
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return nil, nil, spec.InternalServerError{}
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}
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stateEvents := make([]gomatrixserverlib.PDU, len(queryRes.StateEvents))
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for i, stateEvent := range queryRes.StateEvents {
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stateEvents[i] = stateEvent.PDU
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}
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return event, stateEvents, nil
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}
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senderID, err := rsAPI.QuerySenderIDForUser(httpReq.Context(), roomID, userID)
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if err != nil {
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util.GetLogger(httpReq.Context()).WithError(err).Error("rsAPI.QuerySenderIDForUser failed")
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return util.JSONResponse{
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Code: http.StatusInternalServerError,
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JSON: spec.InternalServerError{},
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}
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} else if senderID == nil {
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util.GetLogger(httpReq.Context()).WithField("roomID", roomID).WithField("userID", userID).Error("rsAPI.QuerySenderIDForUser returned nil sender ID")
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return util.JSONResponse{
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Code: http.StatusInternalServerError,
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JSON: spec.InternalServerError{},
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}
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}
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input := gomatrixserverlib.HandleMakeLeaveInput{
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UserID: userID,
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SenderID: *senderID,
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RoomID: roomID,
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RoomVersion: roomVersion,
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RequestOrigin: request.Origin(),
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LocalServerName: cfg.Matrix.ServerName,
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LocalServerInRoom: res.RoomExists && res.IsInRoom,
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BuildEventTemplate: createLeaveTemplate,
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UserIDQuerier: func(roomID spec.RoomID, senderID spec.SenderID) (*spec.UserID, error) {
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return rsAPI.QueryUserIDForSender(httpReq.Context(), roomID, senderID)
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},
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}
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response, internalErr := gomatrixserverlib.HandleMakeLeave(input)
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switch e := internalErr.(type) {
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case nil:
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case spec.InternalServerError:
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util.GetLogger(httpReq.Context()).WithError(internalErr).Error("failed to handle make_leave request")
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return util.JSONResponse{
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Code: http.StatusInternalServerError,
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JSON: spec.InternalServerError{},
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}
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case spec.MatrixError:
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util.GetLogger(httpReq.Context()).WithError(internalErr).Error("failed to handle make_leave request")
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code := http.StatusInternalServerError
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switch e.ErrCode {
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case spec.ErrorForbidden:
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code = http.StatusForbidden
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case spec.ErrorNotFound:
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code = http.StatusNotFound
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case spec.ErrorBadJSON:
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code = http.StatusBadRequest
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}
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return util.JSONResponse{
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Code: code,
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JSON: e,
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}
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default:
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util.GetLogger(httpReq.Context()).WithError(internalErr).Error("failed to handle make_leave request")
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return util.JSONResponse{
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Code: http.StatusBadRequest,
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JSON: spec.Unknown("unknown error"),
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}
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}
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if response == nil {
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util.GetLogger(httpReq.Context()).Error("gmsl.HandleMakeLeave returned invalid response")
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return util.JSONResponse{
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Code: http.StatusInternalServerError,
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JSON: spec.InternalServerError{},
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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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"event": response.LeaveTemplateEvent,
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"room_version": response.RoomVersion,
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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 *fclient.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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roomVersion, err := rsAPI.QueryRoomVersionForRoom(httpReq.Context(), roomID)
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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: spec.UnsupportedRoomVersion(err.Error()),
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}
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}
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verImpl, err := gomatrixserverlib.GetRoomVersion(roomVersion)
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if err != nil {
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return util.JSONResponse{
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Code: http.StatusInternalServerError,
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JSON: spec.UnsupportedRoomVersion(
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fmt.Sprintf("QueryRoomVersionForRoom returned unknown version: %s", roomVersion),
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),
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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 := verImpl.NewEventFromUntrustedJSON(request.Content())
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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: spec.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: spec.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().String() != roomID {
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return util.JSONResponse{
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Code: http.StatusBadRequest,
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JSON: spec.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: spec.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: spec.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(string(event.SenderID())) {
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return util.JSONResponse{
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Code: http.StatusBadRequest,
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JSON: spec.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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sender, err := rsAPI.QueryUserIDForSender(httpReq.Context(), event.RoomID(), event.SenderID())
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if err != nil {
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return util.JSONResponse{
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Code: http.StatusForbidden,
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JSON: spec.Forbidden("The sender of the join is invalid"),
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}
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} else if sender.Domain() != request.Origin() {
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return util.JSONResponse{
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Code: http.StatusForbidden,
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JSON: spec.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: spec.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 util.JSONResponse{
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Code: http.StatusInternalServerError,
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JSON: spec.InternalServerError{},
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}
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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 == spec.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 := verImpl.RedactEventJSON(event.JSON())
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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: spec.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: sender.Domain(),
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Message: redacted,
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AtTS: event.OriginServerTS(),
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ValidityCheckingFunc: gomatrixserverlib.StrictValiditySignatureCheck,
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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 util.JSONResponse{
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Code: http.StatusInternalServerError,
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JSON: spec.InternalServerError{},
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}
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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: spec.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: spec.BadJSON("missing content.membership key"),
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}
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}
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if mem != spec.Leave {
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return util.JSONResponse{
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Code: http.StatusBadRequest,
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JSON: spec.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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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: &types.HeaderedEvent{PDU: event},
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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)
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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: spec.Forbidden(response.ErrMsg),
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}
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}
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return util.JSONResponse{
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Code: http.StatusInternalServerError,
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JSON: spec.InternalServerError{},
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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: struct{}{},
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}
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}
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