mirror of
https://github.com/matrix-org/dendrite
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1647213fac
As outlined in https://github.com/matrix-org/gomatrixserverlib/pull/368 The main change Dendrite side is that `RoomVersion` no longer has any methods on it. Instead, you need to bounce via `gmsl.GetRoomVersion`. It's very interesting to see where exactly Dendrite cares about this. For some places it's creating events (fine) but others are way more specific. Those areas will need to migrate to GMSL at some point.
428 lines
14 KiB
Go
428 lines
14 KiB
Go
// Copyright 2017 Vector Creations 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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"errors"
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"net/http"
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"time"
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"github.com/matrix-org/dendrite/clientapi/httputil"
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"github.com/matrix-org/dendrite/clientapi/jsonerror"
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federationAPI "github.com/matrix-org/dendrite/federationapi/api"
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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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userapi "github.com/matrix-org/dendrite/userapi/api"
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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/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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type invite struct {
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MXID string `json:"mxid"`
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RoomID string `json:"room_id"`
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Sender string `json:"sender"`
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Token string `json:"token"`
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Signed gomatrixserverlib.MemberThirdPartyInviteSigned `json:"signed"`
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}
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type invites struct {
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Medium string `json:"medium"`
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Address string `json:"address"`
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MXID string `json:"mxid"`
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Invites []invite `json:"invites"`
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}
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var (
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errNotLocalUser = errors.New("the user is not from this server")
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errNotInRoom = errors.New("the server isn't currently in the room")
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)
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// CreateInvitesFrom3PIDInvites implements POST /_matrix/federation/v1/3pid/onbind
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func CreateInvitesFrom3PIDInvites(
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req *http.Request, rsAPI api.FederationRoomserverAPI,
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cfg *config.FederationAPI,
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federation federationAPI.FederationClient,
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userAPI userapi.FederationUserAPI,
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) util.JSONResponse {
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var body invites
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if reqErr := httputil.UnmarshalJSONRequest(req, &body); reqErr != nil {
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return *reqErr
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}
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evs := []*gomatrixserverlib.HeaderedEvent{}
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for _, inv := range body.Invites {
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verReq := api.QueryRoomVersionForRoomRequest{RoomID: inv.RoomID}
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verRes := api.QueryRoomVersionForRoomResponse{}
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if err := rsAPI.QueryRoomVersionForRoom(req.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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event, err := createInviteFrom3PIDInvite(
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req.Context(), rsAPI, cfg, inv, federation, userAPI,
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)
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if err != nil {
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util.GetLogger(req.Context()).WithError(err).Error("createInviteFrom3PIDInvite failed")
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return jsonerror.InternalServerError()
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}
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if event != nil {
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evs = append(evs, event.Headered(verRes.RoomVersion))
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}
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}
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// Send all the events
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if err := api.SendEvents(
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req.Context(),
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rsAPI,
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api.KindNew,
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evs,
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cfg.Matrix.ServerName, // TODO: which virtual host?
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"TODO",
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cfg.Matrix.ServerName,
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nil,
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false,
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); err != nil {
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util.GetLogger(req.Context()).WithError(err).Error("SendEvents failed")
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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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// ExchangeThirdPartyInvite implements PUT /_matrix/federation/v1/exchange_third_party_invite/{roomID}
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func ExchangeThirdPartyInvite(
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httpReq *http.Request,
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request *fclient.FederationRequest,
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roomID string,
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rsAPI api.FederationRoomserverAPI,
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cfg *config.FederationAPI,
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federation federationAPI.FederationClient,
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) util.JSONResponse {
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var builder gomatrixserverlib.EventBuilder
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if err := json.Unmarshal(request.Content(), &builder); err != nil {
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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 builder.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 invite event JSON"),
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}
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}
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_, senderDomain, err := cfg.Matrix.SplitLocalID('@', builder.Sender)
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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 sender ID: " + err.Error()),
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}
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}
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// Check that the state key is correct.
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_, targetDomain, err := gomatrixserverlib.SplitID('@', *builder.StateKey)
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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("The event's state key isn't a Matrix user ID"),
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}
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}
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// Check that the target user is from the requesting homeserver.
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if targetDomain != request.Origin() {
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return util.JSONResponse{
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Code: http.StatusBadRequest,
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JSON: jsonerror.BadJSON("The event's state key doesn't have the same domain as the request's origin"),
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}
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}
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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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// Auth and build the event from what the remote server sent us
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event, err := buildMembershipEvent(httpReq.Context(), &builder, rsAPI, cfg)
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if err == errNotInRoom {
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return util.JSONResponse{
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Code: http.StatusNotFound,
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JSON: jsonerror.NotFound("Unknown room " + roomID),
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}
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} else if err != nil {
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util.GetLogger(httpReq.Context()).WithError(err).Error("buildMembershipEvent failed")
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return jsonerror.InternalServerError()
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}
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// Ask the requesting server to sign the newly created event so we know it
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// acknowledged it
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inviteReq, err := fclient.NewInviteV2Request(event.Headered(verRes.RoomVersion), nil)
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if err != nil {
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util.GetLogger(httpReq.Context()).WithError(err).Error("failed to make invite v2 request")
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return jsonerror.InternalServerError()
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}
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signedEvent, err := federation.SendInviteV2(httpReq.Context(), senderDomain, request.Origin(), inviteReq)
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if err != nil {
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util.GetLogger(httpReq.Context()).WithError(err).Error("federation.SendInvite failed")
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return jsonerror.InternalServerError()
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}
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verImpl, err := gomatrixserverlib.GetRoomVersion(verRes.RoomVersion)
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if err != nil {
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util.GetLogger(httpReq.Context()).WithError(err).Errorf("unknown room version: %s", verRes.RoomVersion)
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return jsonerror.InternalServerError()
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}
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inviteEvent, err := verImpl.NewEventFromUntrustedJSON(signedEvent.Event)
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if err != nil {
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util.GetLogger(httpReq.Context()).WithError(err).Error("federation.SendInvite failed")
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return jsonerror.InternalServerError()
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}
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// Send the event to the roomserver
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if err = api.SendEvents(
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httpReq.Context(), rsAPI,
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api.KindNew,
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[]*gomatrixserverlib.HeaderedEvent{
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inviteEvent.Headered(verRes.RoomVersion),
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},
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request.Destination(),
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request.Origin(),
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cfg.Matrix.ServerName,
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nil,
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false,
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); err != nil {
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util.GetLogger(httpReq.Context()).WithError(err).Error("SendEvents failed")
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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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// createInviteFrom3PIDInvite processes an invite provided by the identity server
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// and creates a m.room.member event (with "invite" membership) from it.
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// Returns an error if there was a problem building the event or fetching the
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// necessary data to do so.
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func createInviteFrom3PIDInvite(
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ctx context.Context, rsAPI api.FederationRoomserverAPI,
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cfg *config.FederationAPI,
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inv invite, federation federationAPI.FederationClient,
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userAPI userapi.FederationUserAPI,
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) (*gomatrixserverlib.Event, error) {
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verReq := api.QueryRoomVersionForRoomRequest{RoomID: inv.RoomID}
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verRes := api.QueryRoomVersionForRoomResponse{}
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if err := rsAPI.QueryRoomVersionForRoom(ctx, &verReq, &verRes); err != nil {
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return nil, err
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}
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_, server, err := gomatrixserverlib.SplitID('@', inv.MXID)
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if err != nil {
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return nil, err
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}
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if server != cfg.Matrix.ServerName {
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return nil, errNotLocalUser
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}
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// Build the event
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builder := &gomatrixserverlib.EventBuilder{
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Type: "m.room.member",
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Sender: inv.Sender,
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RoomID: inv.RoomID,
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StateKey: &inv.MXID,
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}
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profile, err := userAPI.QueryProfile(ctx, inv.MXID)
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if err != nil {
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return nil, err
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}
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content := gomatrixserverlib.MemberContent{
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AvatarURL: profile.AvatarURL,
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DisplayName: profile.DisplayName,
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Membership: spec.Invite,
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ThirdPartyInvite: &gomatrixserverlib.MemberThirdPartyInvite{
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Signed: inv.Signed,
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},
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}
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if err = builder.SetContent(content); err != nil {
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return nil, err
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}
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event, err := buildMembershipEvent(ctx, builder, rsAPI, cfg)
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if err == errNotInRoom {
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return nil, sendToRemoteServer(ctx, inv, federation, cfg, *builder)
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}
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if err != nil {
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return nil, err
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}
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return event, nil
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}
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// buildMembershipEvent uses a builder for a m.room.member invite event derived
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// from a third-party invite to auth and build the said event. Returns the said
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// event.
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// Returns errNotInRoom if the server is not in the room the invite is for.
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// Returns an error if something failed during the process.
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func buildMembershipEvent(
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ctx context.Context,
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builder *gomatrixserverlib.EventBuilder, rsAPI api.FederationRoomserverAPI,
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cfg *config.FederationAPI,
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) (*gomatrixserverlib.Event, error) {
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eventsNeeded, err := gomatrixserverlib.StateNeededForEventBuilder(builder)
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if err != nil {
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return nil, err
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}
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if len(eventsNeeded.Tuples()) == 0 {
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return nil, errors.New("expecting state tuples for event builder, got none")
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}
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// Ask the roomserver for information about this room
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queryReq := api.QueryLatestEventsAndStateRequest{
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RoomID: builder.RoomID,
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StateToFetch: eventsNeeded.Tuples(),
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}
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var queryRes api.QueryLatestEventsAndStateResponse
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if err = rsAPI.QueryLatestEventsAndState(ctx, &queryReq, &queryRes); err != nil {
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return nil, err
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}
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if !queryRes.RoomExists {
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// Use federation to auth the event
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return nil, errNotInRoom
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}
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// Auth the event locally
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builder.Depth = queryRes.Depth
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builder.PrevEvents = queryRes.LatestEvents
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authEvents := gomatrixserverlib.NewAuthEvents(nil)
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for i := range queryRes.StateEvents {
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err = authEvents.AddEvent(queryRes.StateEvents[i].Event)
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if err != nil {
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return nil, err
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}
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}
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if err = fillDisplayName(builder, authEvents); err != nil {
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return nil, err
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}
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refs, err := eventsNeeded.AuthEventReferences(&authEvents)
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if err != nil {
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return nil, err
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}
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builder.AuthEvents = refs
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event, err := builder.Build(
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time.Now(), cfg.Matrix.ServerName, cfg.Matrix.KeyID,
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cfg.Matrix.PrivateKey, queryRes.RoomVersion,
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)
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return event, err
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}
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// sendToRemoteServer uses federation to send an invite provided by an identity
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// server to a remote server in case the current server isn't in the room the
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// invite is for.
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// Returns an error if it couldn't get the server names to reach or if all of
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// them responded with an error.
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func sendToRemoteServer(
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ctx context.Context, inv invite,
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federation federationAPI.FederationClient, cfg *config.FederationAPI,
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builder gomatrixserverlib.EventBuilder,
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) (err error) {
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remoteServers := make([]spec.ServerName, 2)
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_, remoteServers[0], err = gomatrixserverlib.SplitID('@', inv.Sender)
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if err != nil {
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return
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}
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// Fallback to the room's server if the sender's domain is the same as
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// the current server's
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_, remoteServers[1], err = gomatrixserverlib.SplitID('!', inv.RoomID)
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if err != nil {
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return
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}
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for _, server := range remoteServers {
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err = federation.ExchangeThirdPartyInvite(ctx, cfg.Matrix.ServerName, server, builder)
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if err == nil {
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return
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}
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logrus.WithError(err).Warnf("failed to send 3PID invite via %s", server)
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}
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return errors.New("failed to send 3PID invite via any server")
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}
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// fillDisplayName looks in a list of auth events for a m.room.third_party_invite
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// event with the state key matching a given m.room.member event's content's token.
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// If such an event is found, fills the "display_name" attribute of the
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// "third_party_invite" structure in the m.room.member event with the display_name
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// from the m.room.third_party_invite event.
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// Returns an error if there was a problem parsing the m.room.third_party_invite
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// event's content or updating the m.room.member event's content.
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// Returns nil if no m.room.third_party_invite with a matching token could be
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// found. Returning an error isn't necessary in this case as the event will be
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// rejected by gomatrixserverlib.
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func fillDisplayName(
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builder *gomatrixserverlib.EventBuilder, authEvents gomatrixserverlib.AuthEvents,
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) error {
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var content gomatrixserverlib.MemberContent
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if err := json.Unmarshal(builder.Content, &content); err != nil {
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return err
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}
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// Look for the m.room.third_party_invite event
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thirdPartyInviteEvent, _ := authEvents.ThirdPartyInvite(content.ThirdPartyInvite.Signed.Token)
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if thirdPartyInviteEvent == nil {
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// If the third party invite event doesn't exist then we can't use it to set the display name.
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return nil
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}
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var thirdPartyInviteContent gomatrixserverlib.ThirdPartyInviteContent
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if err := json.Unmarshal(thirdPartyInviteEvent.Content(), &thirdPartyInviteContent); err != nil {
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return err
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}
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// Use the m.room.third_party_invite event to fill the "displayname" and
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// update the m.room.member event's content with it
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content.ThirdPartyInvite.DisplayName = thirdPartyInviteContent.DisplayName
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return builder.SetContent(content)
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}
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