mirror of
https://github.com/matrix-org/dendrite
synced 2024-09-21 10:28:55 +02:00
506 lines
16 KiB
Go
506 lines
16 KiB
Go
// Copyright 2017 New Vector Ltd
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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 routing
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import (
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"context"
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"encoding/json"
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"fmt"
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"net/http"
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"sort"
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"time"
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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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"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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)
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type JoinRoomQuerier struct {
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roomserver api.FederationRoomserverAPI
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}
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func (rq *JoinRoomQuerier) CurrentStateEvent(ctx context.Context, roomID spec.RoomID, eventType string, stateKey string) (gomatrixserverlib.PDU, error) {
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return rq.roomserver.CurrentStateEvent(ctx, roomID, eventType, stateKey)
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}
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func (rq *JoinRoomQuerier) InvitePending(ctx context.Context, roomID spec.RoomID, userID spec.UserID) (bool, error) {
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return rq.roomserver.InvitePending(ctx, roomID, userID)
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}
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func (rq *JoinRoomQuerier) RestrictedRoomJoinInfo(ctx context.Context, roomID spec.RoomID, userID spec.UserID, localServerName spec.ServerName) (*gomatrixserverlib.RestrictedRoomJoinInfo, error) {
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roomInfo, err := rq.roomserver.QueryRoomInfo(ctx, roomID)
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if err != nil || roomInfo == nil || roomInfo.IsStub() {
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return nil, err
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}
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req := api.QueryServerJoinedToRoomRequest{
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ServerName: localServerName,
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RoomID: roomID.String(),
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}
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res := api.QueryServerJoinedToRoomResponse{}
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if err = rq.roomserver.QueryServerJoinedToRoom(ctx, &req, &res); err != nil {
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util.GetLogger(ctx).WithError(err).Error("rsAPI.QueryServerJoinedToRoom failed")
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return nil, fmt.Errorf("InternalServerError: Failed to query room: %w", err)
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}
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userJoinedToRoom, err := rq.roomserver.UserJoinedToRoom(ctx, types.RoomNID(roomInfo.RoomNID), userID)
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if err != nil {
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util.GetLogger(ctx).WithError(err).Error("rsAPI.UserJoinedToRoom failed")
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return nil, fmt.Errorf("InternalServerError: %w", err)
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}
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locallyJoinedUsers, err := rq.roomserver.LocallyJoinedUsers(ctx, roomInfo.RoomVersion, types.RoomNID(roomInfo.RoomNID))
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if err != nil {
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util.GetLogger(ctx).WithError(err).Error("rsAPI.GetLocallyJoinedUsers failed")
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return nil, fmt.Errorf("InternalServerError: %w", err)
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}
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return &gomatrixserverlib.RestrictedRoomJoinInfo{
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LocalServerInRoom: res.RoomExists && res.IsInRoom,
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UserJoinedToRoom: userJoinedToRoom,
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JoinedUsers: locallyJoinedUsers,
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}, nil
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}
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// MakeJoin implements the /make_join API
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func MakeJoin(
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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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remoteVersions []gomatrixserverlib.RoomVersion,
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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: cfg.Matrix.ServerName,
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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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createJoinTemplate := func(proto *gomatrixserverlib.ProtoEvent) (gomatrixserverlib.PDU, []gomatrixserverlib.PDU, error) {
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identity, err := cfg.Matrix.SigningIdentityFor(request.Destination())
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if err != nil {
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util.GetLogger(httpReq.Context()).WithError(err).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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RoomVersion: roomVersion,
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}
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event, err := eventutil.QueryAndBuildEvent(httpReq.Context(), proto, cfg.Matrix, identity, time.Now(), rsAPI, &queryRes)
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switch e := err.(type) {
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case nil:
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case eventutil.ErrRoomNoExists:
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util.GetLogger(httpReq.Context()).WithError(err).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(err).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(err).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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roomQuerier := JoinRoomQuerier{
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roomserver: rsAPI,
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}
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input := gomatrixserverlib.HandleMakeJoinInput{
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Context: httpReq.Context(),
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UserID: userID,
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RoomID: roomID,
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RoomVersion: roomVersion,
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RemoteVersions: remoteVersions,
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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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RoomQuerier: &roomQuerier,
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BuildEventTemplate: createJoinTemplate,
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}
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response, internalErr := gomatrixserverlib.HandleMakeJoin(input)
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if internalErr != nil {
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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)
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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)
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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.ErrorUnableToAuthoriseJoin:
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code = http.StatusBadRequest
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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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case spec.IncompatibleRoomVersionError:
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util.GetLogger(httpReq.Context()).WithError(internalErr)
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return util.JSONResponse{
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Code: http.StatusBadRequest,
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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)
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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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}
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if response == nil {
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util.GetLogger(httpReq.Context()).Error("gmsl.HandleMakeJoin 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.JoinTemplateEvent,
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"room_version": response.RoomVersion,
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},
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}
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}
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// SendJoin implements the /send_join API
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// The make-join send-join dance makes much more sense as a single
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// flow so the cyclomatic complexity is high:
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// nolint:gocyclo
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func SendJoin(
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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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util.GetLogger(httpReq.Context()).WithError(err).Error("rsAPI.QueryRoomVersionForRoom 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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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 room version: %s", roomVersion),
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),
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}
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}
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event, err := verImpl.NewEventFromUntrustedJSON(request.Content())
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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.BadJSON("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 a state key is provided.
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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 join 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: 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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var serverName spec.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: spec.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: 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 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: spec.BadJSON(
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fmt.Sprintf(
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"The room ID in the request path (%q) must match the room ID in the join event JSON (%q)",
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roomID, event.RoomID(),
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),
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),
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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(
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fmt.Sprintf(
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"The event ID in the request path (%q) must match the event ID in the join event JSON (%q)",
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eventID, event.EventID(),
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),
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),
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}
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}
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// Check that this is in fact a join event
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membership, err := event.Membership()
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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.BadJSON("missing content.membership key"),
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}
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}
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if membership != spec.Join {
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return util.JSONResponse{
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Code: http.StatusBadRequest,
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JSON: spec.BadJSON("membership must be 'join'"),
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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: join.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: 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 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("Signature check failed: " + verifyResults[0].Error.Error()),
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}
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}
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// Fetch the state and auth chain. We do this before we send the events
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// on, in case this fails.
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var stateAndAuthChainResponse api.QueryStateAndAuthChainResponse
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err = rsAPI.QueryStateAndAuthChain(httpReq.Context(), &api.QueryStateAndAuthChainRequest{
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PrevEventIDs: event.PrevEventIDs(),
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AuthEventIDs: event.AuthEventIDs(),
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RoomID: roomID,
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ResolveState: true,
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}, &stateAndAuthChainResponse)
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if err != nil {
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util.GetLogger(httpReq.Context()).WithError(err).Error("rsAPI.QueryStateAndAuthChain 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 !stateAndAuthChainResponse.RoomExists {
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return util.JSONResponse{
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Code: http.StatusNotFound,
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JSON: spec.NotFound("Room does not exist"),
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}
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}
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if !stateAndAuthChainResponse.StateKnown {
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return util.JSONResponse{
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Code: http.StatusForbidden,
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JSON: spec.Forbidden("State not known"),
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}
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}
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// Check if the user is already in the room. If they're already in then
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// there isn't much point in sending another join event into the room.
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// Also check to see if they are banned: if they are then we reject them.
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alreadyJoined := false
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isBanned := false
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for _, se := range stateAndAuthChainResponse.StateEvents {
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if !se.StateKeyEquals(*event.StateKey()) {
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continue
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}
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if membership, merr := se.Membership(); merr == nil {
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alreadyJoined = (membership == spec.Join)
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isBanned = (membership == spec.Ban)
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break
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}
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}
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if isBanned {
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return util.JSONResponse{
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Code: http.StatusForbidden,
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JSON: spec.Forbidden("user is banned"),
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}
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}
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// If the membership content contains a user ID for a server that is not
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// ours then we should kick it back.
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var memberContent gomatrixserverlib.MemberContent
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if err := json.Unmarshal(event.Content(), &memberContent); err != nil {
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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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}
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if memberContent.AuthorisedVia != "" {
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_, domain, err := gomatrixserverlib.SplitID('@', memberContent.AuthorisedVia)
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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.BadJSON(fmt.Sprintf("The authorising username %q is invalid.", memberContent.AuthorisedVia)),
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}
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}
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if domain != cfg.Matrix.ServerName {
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return util.JSONResponse{
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Code: http.StatusBadRequest,
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JSON: spec.BadJSON(fmt.Sprintf("The authorising username %q does not belong to this server.", memberContent.AuthorisedVia)),
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}
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}
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}
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// Sign the membership event. This is required for restricted joins to work
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// in the case that the authorised via user is one of our own users. It also
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// doesn't hurt to do it even if it isn't a restricted join.
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signed := event.Sign(
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string(cfg.Matrix.ServerName),
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cfg.Matrix.KeyID,
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cfg.Matrix.PrivateKey,
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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 joined
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// the room, so set SendAsServer to cfg.Matrix.ServerName
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if !alreadyJoined {
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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: signed},
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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).Error("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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}
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// sort events deterministically by depth (lower is earlier)
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// We also do this because sytest's basic federation server isn't good at using the correct
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// state if these lists are randomised, resulting in flakey tests. :(
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sort.Sort(eventsByDepth(stateAndAuthChainResponse.StateEvents))
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sort.Sort(eventsByDepth(stateAndAuthChainResponse.AuthChainEvents))
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// https://matrix.org/docs/spec/server_server/latest#put-matrix-federation-v1-send-join-roomid-eventid
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return util.JSONResponse{
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Code: http.StatusOK,
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JSON: fclient.RespSendJoin{
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StateEvents: types.NewEventJSONsFromHeaderedEvents(stateAndAuthChainResponse.StateEvents),
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AuthEvents: types.NewEventJSONsFromHeaderedEvents(stateAndAuthChainResponse.AuthChainEvents),
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Origin: cfg.Matrix.ServerName,
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Event: signed.JSON(),
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},
|
|
}
|
|
}
|
|
|
|
type eventsByDepth []*types.HeaderedEvent
|
|
|
|
func (e eventsByDepth) Len() int {
|
|
return len(e)
|
|
}
|
|
func (e eventsByDepth) Swap(i, j int) {
|
|
e[i], e[j] = e[j], e[i]
|
|
}
|
|
func (e eventsByDepth) Less(i, j int) bool {
|
|
return e[i].Depth() < e[j].Depth()
|
|
}
|