dendrite/clientapi/routing/membership.go
Neil Alexander a763cbb0e1
Roomserver/federation input refactor (#2104)
* Put federation client functions into their own file

* Look for missing auth events in RS input

* Remove retrieveMissingAuthEvents from federation API

* Logging

* Sorta transplanted the code over

* Use event origin failing all else

* Don't get stuck on mutexes:

* Add verifier

* Don't mark state events with zero snapshot NID as not existing

* Check missing state if not an outlier before storing the event

* Reject instead of soft-fail, don't copy roominfo so much

* Use synchronous contexts, limit time to fetch missing events

* Clean up some commented out bits

* Simplify `/send` endpoint significantly

* Submit async

* Report errors on sending to RS input

* Set max payload in NATS to 16MB

* Tweak metrics

* Add `workerForRoom` for tidiness

* Try skipping unmarshalling errors for RespMissingEvents

* Track missing prev events separately to avoid calculating state when not possible

* Tweak logic around checking missing state

* Care about state when checking missing prev events

* Don't check missing state for create events

* Try that again

* Handle create events better

* Send create room events as new

* Use given event kind when sending auth/state events

* Revert "Use given event kind when sending auth/state events"

This reverts commit 089d64d271.

* Only search for missing prev events or state for new events

* Tweaks

* We only have missing prev if we don't supply state

* Room version tweaks

* Allow async inputs again

* Apply backpressure to consumers/synchronous requests to hopefully stop things being overwhelmed

* Set timeouts on roomserver input tasks (need to decide what timeout makes sense)

* Use work queue policy, deliver all on restart

* Reduce chance of duplicates being sent by NATS

* Limit the number of servers we attempt to reduce backpressure

* Some review comment fixes

* Tidy up a couple things

* Don't limit servers, randomise order using map

* Some context refactoring

* Update gmsl

* Don't resend create events

* Set stateIDs length correctly or else the roomserver thinks there are missing events when there aren't

* Exclude our own servername

* Try backing off servers

* Make excluding self behaviour optional

* Exclude self from g_m_e

* Update sytest-whitelist

* Update consumers for the roomserver output stream

* Remember to send outliers for state returned from /gme

* Make full HTTP tests less upsetti

* Remove 'If a device list update goes missing, the server resyncs on the next one' from the sytest blacklist

* Remove debugging test

* Fix blacklist again, remove unnecessary duplicate context

* Clearer contexts, don't use background in case there's something happening there

* Don't queue up events more than once in memory

* Correctly identify create events when checking for state

* Fill in gaps again in /gme code

* Remove `AuthEventIDs` from `InputRoomEvent`

* Remove stray field

Co-authored-by: Kegan Dougal <kegan@matrix.org>
2022-01-27 14:29:14 +00:00

485 lines
15 KiB
Go

// Copyright 2017 Vector Creations Ltd
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package routing
import (
"context"
"errors"
"net/http"
"time"
appserviceAPI "github.com/matrix-org/dendrite/appservice/api"
"github.com/matrix-org/dendrite/clientapi/auth/authtypes"
"github.com/matrix-org/dendrite/clientapi/httputil"
"github.com/matrix-org/dendrite/clientapi/jsonerror"
"github.com/matrix-org/dendrite/clientapi/threepid"
"github.com/matrix-org/dendrite/internal/eventutil"
roomserverAPI "github.com/matrix-org/dendrite/roomserver/api"
"github.com/matrix-org/dendrite/setup/config"
userapi "github.com/matrix-org/dendrite/userapi/api"
"github.com/matrix-org/dendrite/userapi/storage/accounts"
"github.com/matrix-org/gomatrixserverlib"
"github.com/matrix-org/util"
)
var errMissingUserID = errors.New("'user_id' must be supplied")
func SendBan(
req *http.Request, accountDB accounts.Database, device *userapi.Device,
roomID string, cfg *config.ClientAPI,
rsAPI roomserverAPI.RoomserverInternalAPI, asAPI appserviceAPI.AppServiceQueryAPI,
) util.JSONResponse {
body, evTime, roomVer, reqErr := extractRequestData(req, roomID, rsAPI)
if reqErr != nil {
return *reqErr
}
errRes := checkMemberInRoom(req.Context(), rsAPI, device.UserID, roomID)
if errRes != nil {
return *errRes
}
plEvent := roomserverAPI.GetStateEvent(req.Context(), rsAPI, roomID, gomatrixserverlib.StateKeyTuple{
EventType: gomatrixserverlib.MRoomPowerLevels,
StateKey: "",
})
if plEvent == nil {
return util.JSONResponse{
Code: 403,
JSON: jsonerror.Forbidden("You don't have permission to ban this user, no power_levels event in this room."),
}
}
pl, err := plEvent.PowerLevels()
if err != nil {
return util.JSONResponse{
Code: 403,
JSON: jsonerror.Forbidden("You don't have permission to ban this user, the power_levels event for this room is malformed so auth checks cannot be performed."),
}
}
allowedToBan := pl.UserLevel(device.UserID) >= pl.Ban
if !allowedToBan {
return util.JSONResponse{
Code: 403,
JSON: jsonerror.Forbidden("You don't have permission to ban this user, power level too low."),
}
}
return sendMembership(req.Context(), accountDB, device, roomID, "ban", body.Reason, cfg, body.UserID, evTime, roomVer, rsAPI, asAPI)
}
func sendMembership(ctx context.Context, accountDB accounts.Database, device *userapi.Device,
roomID, membership, reason string, cfg *config.ClientAPI, targetUserID string, evTime time.Time,
roomVer gomatrixserverlib.RoomVersion,
rsAPI roomserverAPI.RoomserverInternalAPI, asAPI appserviceAPI.AppServiceQueryAPI) util.JSONResponse {
event, err := buildMembershipEvent(
ctx, targetUserID, reason, accountDB, device, membership,
roomID, false, cfg, evTime, rsAPI, asAPI,
)
if err == errMissingUserID {
return util.JSONResponse{
Code: http.StatusBadRequest,
JSON: jsonerror.BadJSON(err.Error()),
}
} else if err == eventutil.ErrRoomNoExists {
return util.JSONResponse{
Code: http.StatusNotFound,
JSON: jsonerror.NotFound(err.Error()),
}
} else if err != nil {
util.GetLogger(ctx).WithError(err).Error("buildMembershipEvent failed")
return jsonerror.InternalServerError()
}
if err = roomserverAPI.SendEvents(
ctx, rsAPI,
roomserverAPI.KindNew,
[]*gomatrixserverlib.HeaderedEvent{event.Event.Headered(roomVer)},
cfg.Matrix.ServerName,
cfg.Matrix.ServerName,
nil,
false,
); err != nil {
util.GetLogger(ctx).WithError(err).Error("SendEvents failed")
return jsonerror.InternalServerError()
}
return util.JSONResponse{
Code: http.StatusOK,
JSON: struct{}{},
}
}
func SendKick(
req *http.Request, accountDB accounts.Database, device *userapi.Device,
roomID string, cfg *config.ClientAPI,
rsAPI roomserverAPI.RoomserverInternalAPI, asAPI appserviceAPI.AppServiceQueryAPI,
) util.JSONResponse {
body, evTime, roomVer, reqErr := extractRequestData(req, roomID, rsAPI)
if reqErr != nil {
return *reqErr
}
if body.UserID == "" {
return util.JSONResponse{
Code: 400,
JSON: jsonerror.BadJSON("missing user_id"),
}
}
errRes := checkMemberInRoom(req.Context(), rsAPI, device.UserID, roomID)
if errRes != nil {
return *errRes
}
var queryRes roomserverAPI.QueryMembershipForUserResponse
err := rsAPI.QueryMembershipForUser(req.Context(), &roomserverAPI.QueryMembershipForUserRequest{
RoomID: roomID,
UserID: body.UserID,
}, &queryRes)
if err != nil {
return util.ErrorResponse(err)
}
// kick is only valid if the user is not currently banned or left (that is, they are joined or invited)
if queryRes.Membership != "join" && queryRes.Membership != "invite" {
return util.JSONResponse{
Code: 403,
JSON: jsonerror.Unknown("cannot /kick banned or left users"),
}
}
// TODO: should we be using SendLeave instead?
return sendMembership(req.Context(), accountDB, device, roomID, "leave", body.Reason, cfg, body.UserID, evTime, roomVer, rsAPI, asAPI)
}
func SendUnban(
req *http.Request, accountDB accounts.Database, device *userapi.Device,
roomID string, cfg *config.ClientAPI,
rsAPI roomserverAPI.RoomserverInternalAPI, asAPI appserviceAPI.AppServiceQueryAPI,
) util.JSONResponse {
body, evTime, roomVer, reqErr := extractRequestData(req, roomID, rsAPI)
if reqErr != nil {
return *reqErr
}
if body.UserID == "" {
return util.JSONResponse{
Code: 400,
JSON: jsonerror.BadJSON("missing user_id"),
}
}
var queryRes roomserverAPI.QueryMembershipForUserResponse
err := rsAPI.QueryMembershipForUser(req.Context(), &roomserverAPI.QueryMembershipForUserRequest{
RoomID: roomID,
UserID: body.UserID,
}, &queryRes)
if err != nil {
return util.ErrorResponse(err)
}
// unban is only valid if the user is currently banned
if queryRes.Membership != "ban" {
return util.JSONResponse{
Code: 400,
JSON: jsonerror.Unknown("can only /unban users that are banned"),
}
}
// TODO: should we be using SendLeave instead?
return sendMembership(req.Context(), accountDB, device, roomID, "leave", body.Reason, cfg, body.UserID, evTime, roomVer, rsAPI, asAPI)
}
func SendInvite(
req *http.Request, accountDB accounts.Database, device *userapi.Device,
roomID string, cfg *config.ClientAPI,
rsAPI roomserverAPI.RoomserverInternalAPI, asAPI appserviceAPI.AppServiceQueryAPI,
) util.JSONResponse {
body, evTime, _, reqErr := extractRequestData(req, roomID, rsAPI)
if reqErr != nil {
return *reqErr
}
inviteStored, jsonErrResp := checkAndProcessThreepid(
req, device, body, cfg, rsAPI, accountDB, roomID, evTime,
)
if jsonErrResp != nil {
return *jsonErrResp
}
// If an invite has been stored on an identity server, it means that a
// m.room.third_party_invite event has been emitted and that we shouldn't
// emit a m.room.member one.
if inviteStored {
return util.JSONResponse{
Code: http.StatusOK,
JSON: struct{}{},
}
}
event, err := buildMembershipEvent(
req.Context(), body.UserID, body.Reason, accountDB, device, "invite",
roomID, false, cfg, evTime, rsAPI, asAPI,
)
if err == errMissingUserID {
return util.JSONResponse{
Code: http.StatusBadRequest,
JSON: jsonerror.BadJSON(err.Error()),
}
} else if err == eventutil.ErrRoomNoExists {
return util.JSONResponse{
Code: http.StatusNotFound,
JSON: jsonerror.NotFound(err.Error()),
}
} else if err != nil {
util.GetLogger(req.Context()).WithError(err).Error("buildMembershipEvent failed")
return jsonerror.InternalServerError()
}
err = roomserverAPI.SendInvite(
req.Context(), rsAPI,
event,
nil, // ask the roomserver to draw up invite room state for us
cfg.Matrix.ServerName,
nil,
)
switch e := err.(type) {
case *roomserverAPI.PerformError:
return e.JSONResponse()
case nil:
return util.JSONResponse{
Code: http.StatusOK,
JSON: struct{}{},
}
default:
util.GetLogger(req.Context()).WithError(err).Error("roomserverAPI.SendInvite failed")
return util.JSONResponse{
Code: http.StatusInternalServerError,
JSON: jsonerror.InternalServerError(),
}
}
}
func buildMembershipEvent(
ctx context.Context,
targetUserID, reason string, accountDB accounts.Database,
device *userapi.Device,
membership, roomID string, isDirect bool,
cfg *config.ClientAPI, evTime time.Time,
rsAPI roomserverAPI.RoomserverInternalAPI, asAPI appserviceAPI.AppServiceQueryAPI,
) (*gomatrixserverlib.HeaderedEvent, error) {
profile, err := loadProfile(ctx, targetUserID, cfg, accountDB, asAPI)
if err != nil {
return nil, err
}
builder := gomatrixserverlib.EventBuilder{
Sender: device.UserID,
RoomID: roomID,
Type: "m.room.member",
StateKey: &targetUserID,
}
content := gomatrixserverlib.MemberContent{
Membership: membership,
DisplayName: profile.DisplayName,
AvatarURL: profile.AvatarURL,
Reason: reason,
IsDirect: isDirect,
}
if err = builder.SetContent(content); err != nil {
return nil, err
}
return eventutil.QueryAndBuildEvent(ctx, &builder, cfg.Matrix, evTime, rsAPI, nil)
}
// loadProfile lookups the profile of a given user from the database and returns
// it if the user is local to this server, or returns an empty profile if not.
// Returns an error if the retrieval failed or if the first parameter isn't a
// valid Matrix ID.
func loadProfile(
ctx context.Context,
userID string,
cfg *config.ClientAPI,
accountDB accounts.Database,
asAPI appserviceAPI.AppServiceQueryAPI,
) (*authtypes.Profile, error) {
_, serverName, err := gomatrixserverlib.SplitID('@', userID)
if err != nil {
return nil, err
}
var profile *authtypes.Profile
if serverName == cfg.Matrix.ServerName {
profile, err = appserviceAPI.RetrieveUserProfile(ctx, userID, asAPI, accountDB)
} else {
profile = &authtypes.Profile{}
}
return profile, err
}
func extractRequestData(req *http.Request, roomID string, rsAPI roomserverAPI.RoomserverInternalAPI) (
body *threepid.MembershipRequest, evTime time.Time, roomVer gomatrixserverlib.RoomVersion, resErr *util.JSONResponse,
) {
verReq := roomserverAPI.QueryRoomVersionForRoomRequest{RoomID: roomID}
verRes := roomserverAPI.QueryRoomVersionForRoomResponse{}
if err := rsAPI.QueryRoomVersionForRoom(req.Context(), &verReq, &verRes); err != nil {
resErr = &util.JSONResponse{
Code: http.StatusBadRequest,
JSON: jsonerror.UnsupportedRoomVersion(err.Error()),
}
return
}
roomVer = verRes.RoomVersion
if reqErr := httputil.UnmarshalJSONRequest(req, &body); reqErr != nil {
resErr = reqErr
return
}
evTime, err := httputil.ParseTSParam(req)
if err != nil {
resErr = &util.JSONResponse{
Code: http.StatusBadRequest,
JSON: jsonerror.InvalidArgumentValue(err.Error()),
}
return
}
return
}
func checkAndProcessThreepid(
req *http.Request,
device *userapi.Device,
body *threepid.MembershipRequest,
cfg *config.ClientAPI,
rsAPI roomserverAPI.RoomserverInternalAPI,
accountDB accounts.Database,
roomID string,
evTime time.Time,
) (inviteStored bool, errRes *util.JSONResponse) {
inviteStored, err := threepid.CheckAndProcessInvite(
req.Context(), device, body, cfg, rsAPI, accountDB,
roomID, evTime,
)
if err == threepid.ErrMissingParameter {
return inviteStored, &util.JSONResponse{
Code: http.StatusBadRequest,
JSON: jsonerror.BadJSON(err.Error()),
}
} else if err == threepid.ErrNotTrusted {
return inviteStored, &util.JSONResponse{
Code: http.StatusBadRequest,
JSON: jsonerror.NotTrusted(body.IDServer),
}
} else if err == eventutil.ErrRoomNoExists {
return inviteStored, &util.JSONResponse{
Code: http.StatusNotFound,
JSON: jsonerror.NotFound(err.Error()),
}
} else if e, ok := err.(gomatrixserverlib.BadJSONError); ok {
return inviteStored, &util.JSONResponse{
Code: http.StatusBadRequest,
JSON: jsonerror.BadJSON(e.Error()),
}
}
if err != nil {
util.GetLogger(req.Context()).WithError(err).Error("threepid.CheckAndProcessInvite failed")
er := jsonerror.InternalServerError()
return inviteStored, &er
}
return
}
func checkMemberInRoom(ctx context.Context, rsAPI roomserverAPI.RoomserverInternalAPI, userID, roomID string) *util.JSONResponse {
tuple := gomatrixserverlib.StateKeyTuple{
EventType: gomatrixserverlib.MRoomMember,
StateKey: userID,
}
var membershipRes roomserverAPI.QueryCurrentStateResponse
err := rsAPI.QueryCurrentState(ctx, &roomserverAPI.QueryCurrentStateRequest{
RoomID: roomID,
StateTuples: []gomatrixserverlib.StateKeyTuple{tuple},
}, &membershipRes)
if err != nil {
util.GetLogger(ctx).WithError(err).Error("QueryCurrentState: could not query membership for user")
e := jsonerror.InternalServerError()
return &e
}
ev := membershipRes.StateEvents[tuple]
if ev == nil {
return &util.JSONResponse{
Code: http.StatusForbidden,
JSON: jsonerror.Forbidden("user does not belong to room"),
}
}
membership, err := ev.Membership()
if err != nil {
util.GetLogger(ctx).WithError(err).Error("Member event isn't valid")
e := jsonerror.InternalServerError()
return &e
}
if membership != gomatrixserverlib.Join {
return &util.JSONResponse{
Code: http.StatusForbidden,
JSON: jsonerror.Forbidden("user does not belong to room"),
}
}
return nil
}
func SendForget(
req *http.Request, device *userapi.Device,
roomID string, rsAPI roomserverAPI.RoomserverInternalAPI,
) util.JSONResponse {
ctx := req.Context()
logger := util.GetLogger(ctx).WithField("roomID", roomID).WithField("userID", device.UserID)
var membershipRes roomserverAPI.QueryMembershipForUserResponse
membershipReq := roomserverAPI.QueryMembershipForUserRequest{
RoomID: roomID,
UserID: device.UserID,
}
err := rsAPI.QueryMembershipForUser(ctx, &membershipReq, &membershipRes)
if err != nil {
logger.WithError(err).Error("QueryMembershipForUser: could not query membership for user")
return jsonerror.InternalServerError()
}
if membershipRes.IsInRoom {
return util.JSONResponse{
Code: http.StatusBadRequest,
JSON: jsonerror.Forbidden("user is still a member of the room"),
}
}
if !membershipRes.HasBeenInRoom {
return util.JSONResponse{
Code: http.StatusBadRequest,
JSON: jsonerror.Forbidden("user did not belong to room"),
}
}
request := roomserverAPI.PerformForgetRequest{
RoomID: roomID,
UserID: device.UserID,
}
response := roomserverAPI.PerformForgetResponse{}
if err := rsAPI.PerformForget(ctx, &request, &response); err != nil {
logger.WithError(err).Error("PerformForget: unable to forget room")
return jsonerror.InternalServerError()
}
return util.JSONResponse{
Code: http.StatusOK,
JSON: struct{}{},
}
}