From d35a5642e89a2a1b64f1c2ed1cb13e6080987b1c Mon Sep 17 00:00:00 2001 From: Till <2353100+S7evinK@users.noreply.github.com> Date: Fri, 11 Nov 2022 10:52:08 +0100 Subject: [PATCH] Deny guest access on several endpoints (#2873) Second part for guest access, this adds a `WithAllowGuests()` option to `MakeAuthAPI`, allowing guests to access the specified endpoints. Endpoints taken from the [spec](https://spec.matrix.org/v1.4/client-server-api/#client-behaviour-14) and by checking Synapse endpoints for `allow_guest=true`. --- clientapi/routing/routing.go | 68 +++++++++++++++++------------------ internal/httputil/httpapi.go | 29 +++++++++++++++ setup/mscs/msc2946/msc2946.go | 2 +- syncapi/routing/routing.go | 18 +++++----- 4 files changed, 73 insertions(+), 44 deletions(-) diff --git a/clientapi/routing/routing.go b/clientapi/routing/routing.go index f35aa7e1..1b3ef120 100644 --- a/clientapi/routing/routing.go +++ b/clientapi/routing/routing.go @@ -252,7 +252,7 @@ func Setup( return JoinRoomByIDOrAlias( req, device, rsAPI, userAPI, vars["roomIDOrAlias"], ) - }), + }, httputil.WithAllowGuests()), ).Methods(http.MethodPost, http.MethodOptions) if mscCfg.Enabled("msc2753") { @@ -274,7 +274,7 @@ func Setup( v3mux.Handle("/joined_rooms", httputil.MakeAuthAPI("joined_rooms", userAPI, func(req *http.Request, device *userapi.Device) util.JSONResponse { return GetJoinedRooms(req, device, rsAPI) - }), + }, httputil.WithAllowGuests()), ).Methods(http.MethodGet, http.MethodOptions) v3mux.Handle("/rooms/{roomID}/join", httputil.MakeAuthAPI(gomatrixserverlib.Join, userAPI, func(req *http.Request, device *userapi.Device) util.JSONResponse { @@ -288,7 +288,7 @@ func Setup( return JoinRoomByIDOrAlias( req, device, rsAPI, userAPI, vars["roomID"], ) - }), + }, httputil.WithAllowGuests()), ).Methods(http.MethodPost, http.MethodOptions) v3mux.Handle("/rooms/{roomID}/leave", httputil.MakeAuthAPI("membership", userAPI, func(req *http.Request, device *userapi.Device) util.JSONResponse { @@ -302,7 +302,7 @@ func Setup( return LeaveRoomByID( req, device, rsAPI, vars["roomID"], ) - }), + }, httputil.WithAllowGuests()), ).Methods(http.MethodPost, http.MethodOptions) v3mux.Handle("/rooms/{roomID}/unpeek", httputil.MakeAuthAPI("unpeek", userAPI, func(req *http.Request, device *userapi.Device) util.JSONResponse { @@ -361,7 +361,7 @@ func Setup( return util.ErrorResponse(err) } return SendEvent(req, device, vars["roomID"], vars["eventType"], nil, nil, cfg, rsAPI, nil) - }), + }, httputil.WithAllowGuests()), ).Methods(http.MethodPost, http.MethodOptions) v3mux.Handle("/rooms/{roomID}/send/{eventType}/{txnID}", httputil.MakeAuthAPI("send_message", userAPI, func(req *http.Request, device *userapi.Device) util.JSONResponse { @@ -372,7 +372,7 @@ func Setup( txnID := vars["txnID"] return SendEvent(req, device, vars["roomID"], vars["eventType"], &txnID, nil, cfg, rsAPI, transactionsCache) - }), + }, httputil.WithAllowGuests()), ).Methods(http.MethodPut, http.MethodOptions) v3mux.Handle("/rooms/{roomID}/state", httputil.MakeAuthAPI("room_state", userAPI, func(req *http.Request, device *userapi.Device) util.JSONResponse { @@ -381,7 +381,7 @@ func Setup( return util.ErrorResponse(err) } return OnIncomingStateRequest(req.Context(), device, rsAPI, vars["roomID"]) - })).Methods(http.MethodGet, http.MethodOptions) + }, httputil.WithAllowGuests())).Methods(http.MethodGet, http.MethodOptions) v3mux.Handle("/rooms/{roomID}/aliases", httputil.MakeAuthAPI("aliases", userAPI, func(req *http.Request, device *userapi.Device) util.JSONResponse { vars, err := httputil.URLDecodeMapValues(mux.Vars(req)) @@ -400,7 +400,7 @@ func Setup( eventType := strings.TrimSuffix(vars["type"], "/") eventFormat := req.URL.Query().Get("format") == "event" return OnIncomingStateTypeRequest(req.Context(), device, rsAPI, vars["roomID"], eventType, "", eventFormat) - })).Methods(http.MethodGet, http.MethodOptions) + }, httputil.WithAllowGuests())).Methods(http.MethodGet, http.MethodOptions) v3mux.Handle("/rooms/{roomID}/state/{type}/{stateKey}", httputil.MakeAuthAPI("room_state", userAPI, func(req *http.Request, device *userapi.Device) util.JSONResponse { vars, err := httputil.URLDecodeMapValues(mux.Vars(req)) @@ -409,7 +409,7 @@ func Setup( } eventFormat := req.URL.Query().Get("format") == "event" return OnIncomingStateTypeRequest(req.Context(), device, rsAPI, vars["roomID"], vars["type"], vars["stateKey"], eventFormat) - })).Methods(http.MethodGet, http.MethodOptions) + }, httputil.WithAllowGuests())).Methods(http.MethodGet, http.MethodOptions) v3mux.Handle("/rooms/{roomID}/state/{eventType:[^/]+/?}", httputil.MakeAuthAPI("send_message", userAPI, func(req *http.Request, device *userapi.Device) util.JSONResponse { @@ -420,7 +420,7 @@ func Setup( emptyString := "" eventType := strings.TrimSuffix(vars["eventType"], "/") return SendEvent(req, device, vars["roomID"], eventType, nil, &emptyString, cfg, rsAPI, nil) - }), + }, httputil.WithAllowGuests()), ).Methods(http.MethodPut, http.MethodOptions) v3mux.Handle("/rooms/{roomID}/state/{eventType}/{stateKey}", @@ -431,7 +431,7 @@ func Setup( } stateKey := vars["stateKey"] return SendEvent(req, device, vars["roomID"], vars["eventType"], nil, &stateKey, cfg, rsAPI, nil) - }), + }, httputil.WithAllowGuests()), ).Methods(http.MethodPut, http.MethodOptions) v3mux.Handle("/register", httputil.MakeExternalAPI("register", func(req *http.Request) util.JSONResponse { @@ -575,7 +575,7 @@ func Setup( } txnID := vars["txnID"] return SendToDevice(req, device, syncProducer, transactionsCache, vars["eventType"], &txnID) - }), + }, httputil.WithAllowGuests()), ).Methods(http.MethodPut, http.MethodOptions) // This is only here because sytest refers to /unstable for this endpoint @@ -589,7 +589,7 @@ func Setup( } txnID := vars["txnID"] return SendToDevice(req, device, syncProducer, transactionsCache, vars["eventType"], &txnID) - }), + }, httputil.WithAllowGuests()), ).Methods(http.MethodPut, http.MethodOptions) v3mux.Handle("/account/whoami", @@ -598,7 +598,7 @@ func Setup( return *r } return Whoami(req, device) - }), + }, httputil.WithAllowGuests()), ).Methods(http.MethodGet, http.MethodOptions) v3mux.Handle("/account/password", @@ -830,7 +830,7 @@ func Setup( return util.ErrorResponse(err) } return SetDisplayName(req, userAPI, device, vars["userID"], cfg, rsAPI) - }), + }, httputil.WithAllowGuests()), ).Methods(http.MethodPut, http.MethodOptions) // Browsers use the OPTIONS HTTP method to check if the CORS policy allows // PUT requests, so we need to allow this method @@ -871,7 +871,7 @@ func Setup( v3mux.Handle("/thirdparty/protocols", httputil.MakeAuthAPI("thirdparty_protocols", userAPI, func(req *http.Request, device *userapi.Device) util.JSONResponse { return Protocols(req, asAPI, device, "") - }), + }, httputil.WithAllowGuests()), ).Methods(http.MethodGet, http.MethodOptions) v3mux.Handle("/thirdparty/protocol/{protocolID}", @@ -881,7 +881,7 @@ func Setup( return util.ErrorResponse(err) } return Protocols(req, asAPI, device, vars["protocolID"]) - }), + }, httputil.WithAllowGuests()), ).Methods(http.MethodGet, http.MethodOptions) v3mux.Handle("/thirdparty/user/{protocolID}", @@ -891,13 +891,13 @@ func Setup( return util.ErrorResponse(err) } return User(req, asAPI, device, vars["protocolID"], req.URL.Query()) - }), + }, httputil.WithAllowGuests()), ).Methods(http.MethodGet, http.MethodOptions) v3mux.Handle("/thirdparty/user", httputil.MakeAuthAPI("thirdparty_user", userAPI, func(req *http.Request, device *userapi.Device) util.JSONResponse { return User(req, asAPI, device, "", req.URL.Query()) - }), + }, httputil.WithAllowGuests()), ).Methods(http.MethodGet, http.MethodOptions) v3mux.Handle("/thirdparty/location/{protocolID}", @@ -907,13 +907,13 @@ func Setup( return util.ErrorResponse(err) } return Location(req, asAPI, device, vars["protocolID"], req.URL.Query()) - }), + }, httputil.WithAllowGuests()), ).Methods(http.MethodGet, http.MethodOptions) v3mux.Handle("/thirdparty/location", httputil.MakeAuthAPI("thirdparty_location", userAPI, func(req *http.Request, device *userapi.Device) util.JSONResponse { return Location(req, asAPI, device, "", req.URL.Query()) - }), + }, httputil.WithAllowGuests()), ).Methods(http.MethodGet, http.MethodOptions) v3mux.Handle("/rooms/{roomID}/initialSync", @@ -1054,7 +1054,7 @@ func Setup( v3mux.Handle("/devices", httputil.MakeAuthAPI("get_devices", userAPI, func(req *http.Request, device *userapi.Device) util.JSONResponse { return GetDevicesByLocalpart(req, userAPI, device) - }), + }, httputil.WithAllowGuests()), ).Methods(http.MethodGet, http.MethodOptions) v3mux.Handle("/devices/{deviceID}", @@ -1064,7 +1064,7 @@ func Setup( return util.ErrorResponse(err) } return GetDeviceByID(req, userAPI, device, vars["deviceID"]) - }), + }, httputil.WithAllowGuests()), ).Methods(http.MethodGet, http.MethodOptions) v3mux.Handle("/devices/{deviceID}", @@ -1074,7 +1074,7 @@ func Setup( return util.ErrorResponse(err) } return UpdateDeviceByID(req, userAPI, device, vars["deviceID"]) - }), + }, httputil.WithAllowGuests()), ).Methods(http.MethodPut, http.MethodOptions) v3mux.Handle("/devices/{deviceID}", @@ -1116,21 +1116,21 @@ func Setup( // Stub implementations for sytest v3mux.Handle("/events", - httputil.MakeExternalAPI("events", func(req *http.Request) util.JSONResponse { + httputil.MakeAuthAPI("events", userAPI, func(req *http.Request, device *userapi.Device) util.JSONResponse { return util.JSONResponse{Code: http.StatusOK, JSON: map[string]interface{}{ "chunk": []interface{}{}, "start": "", "end": "", }} - }), + }, httputil.WithAllowGuests()), ).Methods(http.MethodGet, http.MethodOptions) v3mux.Handle("/initialSync", - httputil.MakeExternalAPI("initial_sync", func(req *http.Request) util.JSONResponse { + httputil.MakeAuthAPI("initial_sync", userAPI, func(req *http.Request, device *userapi.Device) util.JSONResponse { return util.JSONResponse{Code: http.StatusOK, JSON: map[string]interface{}{ "end": "", }} - }), + }, httputil.WithAllowGuests()), ).Methods(http.MethodGet, http.MethodOptions) v3mux.Handle("/user/{userId}/rooms/{roomId}/tags", @@ -1169,7 +1169,7 @@ func Setup( return *r } return GetCapabilities(req, rsAPI) - }), + }, httputil.WithAllowGuests()), ).Methods(http.MethodGet, http.MethodOptions) // Key Backup Versions (Metadata) @@ -1350,7 +1350,7 @@ func Setup( postDeviceSigningSignatures := httputil.MakeAuthAPI("post_device_signing_signatures", userAPI, func(req *http.Request, device *userapi.Device) util.JSONResponse { return UploadCrossSigningDeviceSignatures(req, keyAPI, device) - }) + }, httputil.WithAllowGuests()) v3mux.Handle("/keys/device_signing/upload", postDeviceSigningKeys).Methods(http.MethodPost, http.MethodOptions) v3mux.Handle("/keys/signatures/upload", postDeviceSigningSignatures).Methods(http.MethodPost, http.MethodOptions) @@ -1362,22 +1362,22 @@ func Setup( v3mux.Handle("/keys/upload/{deviceID}", httputil.MakeAuthAPI("keys_upload", userAPI, func(req *http.Request, device *userapi.Device) util.JSONResponse { return UploadKeys(req, keyAPI, device) - }), + }, httputil.WithAllowGuests()), ).Methods(http.MethodPost, http.MethodOptions) v3mux.Handle("/keys/upload", httputil.MakeAuthAPI("keys_upload", userAPI, func(req *http.Request, device *userapi.Device) util.JSONResponse { return UploadKeys(req, keyAPI, device) - }), + }, httputil.WithAllowGuests()), ).Methods(http.MethodPost, http.MethodOptions) v3mux.Handle("/keys/query", httputil.MakeAuthAPI("keys_query", userAPI, func(req *http.Request, device *userapi.Device) util.JSONResponse { return QueryKeys(req, keyAPI, device) - }), + }, httputil.WithAllowGuests()), ).Methods(http.MethodPost, http.MethodOptions) v3mux.Handle("/keys/claim", httputil.MakeAuthAPI("keys_claim", userAPI, func(req *http.Request, device *userapi.Device) util.JSONResponse { return ClaimKeys(req, keyAPI) - }), + }, httputil.WithAllowGuests()), ).Methods(http.MethodPost, http.MethodOptions) v3mux.Handle("/rooms/{roomId}/receipt/{receiptType}/{eventId}", httputil.MakeAuthAPI(gomatrixserverlib.Join, userAPI, func(req *http.Request, device *userapi.Device) util.JSONResponse { diff --git a/internal/httputil/httpapi.go b/internal/httputil/httpapi.go index 36dcaf45..4f33a3f7 100644 --- a/internal/httputil/httpapi.go +++ b/internal/httputil/httpapi.go @@ -42,10 +42,26 @@ type BasicAuth struct { Password string `yaml:"password"` } +type AuthAPIOpts struct { + GuestAccessAllowed bool +} + +// AuthAPIOption is an option to MakeAuthAPI to add additional checks (e.g. guest access) to verify +// the user is allowed to do specific things. +type AuthAPIOption func(opts *AuthAPIOpts) + +// WithAllowGuests checks that guest users have access to this endpoint +func WithAllowGuests() AuthAPIOption { + return func(opts *AuthAPIOpts) { + opts.GuestAccessAllowed = true + } +} + // MakeAuthAPI turns a util.JSONRequestHandler function into an http.Handler which authenticates the request. func MakeAuthAPI( metricsName string, userAPI userapi.QueryAcccessTokenAPI, f func(*http.Request, *userapi.Device) util.JSONResponse, + checks ...AuthAPIOption, ) http.Handler { h := func(req *http.Request) util.JSONResponse { logger := util.GetLogger(req.Context()) @@ -76,6 +92,19 @@ func MakeAuthAPI( } }() + // apply additional checks, if any + opts := AuthAPIOpts{} + for _, opt := range checks { + opt(&opts) + } + + if !opts.GuestAccessAllowed && device.AccountType == userapi.AccountTypeGuest { + return util.JSONResponse{ + Code: http.StatusForbidden, + JSON: jsonerror.GuestAccessForbidden("Guest access not allowed"), + } + } + jsonRes := f(req, device) // do not log 4xx as errors as they are client fails, not server fails if hub != nil && jsonRes.Code >= 500 { diff --git a/setup/mscs/msc2946/msc2946.go b/setup/mscs/msc2946/msc2946.go index bc9df0f9..d7c02254 100644 --- a/setup/mscs/msc2946/msc2946.go +++ b/setup/mscs/msc2946/msc2946.go @@ -57,7 +57,7 @@ func Enable( base *base.BaseDendrite, rsAPI roomserver.RoomserverInternalAPI, userAPI userapi.UserInternalAPI, fsAPI fs.FederationInternalAPI, keyRing gomatrixserverlib.JSONVerifier, cache caching.SpaceSummaryRoomsCache, ) error { - clientAPI := httputil.MakeAuthAPI("spaces", userAPI, spacesHandler(rsAPI, fsAPI, cache, base.Cfg.Global.ServerName)) + clientAPI := httputil.MakeAuthAPI("spaces", userAPI, spacesHandler(rsAPI, fsAPI, cache, base.Cfg.Global.ServerName), httputil.WithAllowGuests()) base.PublicClientAPIMux.Handle("/v1/rooms/{roomID}/hierarchy", clientAPI).Methods(http.MethodGet, http.MethodOptions) base.PublicClientAPIMux.Handle("/unstable/org.matrix.msc2946/rooms/{roomID}/hierarchy", clientAPI).Methods(http.MethodGet, http.MethodOptions) diff --git a/syncapi/routing/routing.go b/syncapi/routing/routing.go index bc3ad238..4cc1a6a8 100644 --- a/syncapi/routing/routing.go +++ b/syncapi/routing/routing.go @@ -51,7 +51,7 @@ func Setup( // TODO: Add AS support for all handlers below. v3mux.Handle("/sync", httputil.MakeAuthAPI("sync", userAPI, func(req *http.Request, device *userapi.Device) util.JSONResponse { return srp.OnIncomingSyncRequest(req, device) - })).Methods(http.MethodGet, http.MethodOptions) + }, httputil.WithAllowGuests())).Methods(http.MethodGet, http.MethodOptions) v3mux.Handle("/rooms/{roomID}/messages", httputil.MakeAuthAPI("room_messages", userAPI, func(req *http.Request, device *userapi.Device) util.JSONResponse { vars, err := httputil.URLDecodeMapValues(mux.Vars(req)) @@ -59,7 +59,7 @@ func Setup( return util.ErrorResponse(err) } return OnIncomingMessagesRequest(req, syncDB, vars["roomID"], device, rsAPI, cfg, srp, lazyLoadCache) - })).Methods(http.MethodGet, http.MethodOptions) + }, httputil.WithAllowGuests())).Methods(http.MethodGet, http.MethodOptions) v3mux.Handle("/rooms/{roomID}/event/{eventID}", httputil.MakeAuthAPI("rooms_get_event", userAPI, func(req *http.Request, device *userapi.Device) util.JSONResponse { @@ -68,7 +68,7 @@ func Setup( return util.ErrorResponse(err) } return GetEvent(req, device, vars["roomID"], vars["eventID"], cfg, syncDB, rsAPI) - }), + }, httputil.WithAllowGuests()), ).Methods(http.MethodGet, http.MethodOptions) v3mux.Handle("/user/{userId}/filter", @@ -93,7 +93,7 @@ func Setup( v3mux.Handle("/keys/changes", httputil.MakeAuthAPI("keys_changes", userAPI, func(req *http.Request, device *userapi.Device) util.JSONResponse { return srp.OnIncomingKeyChangeRequest(req, device) - })).Methods(http.MethodGet, http.MethodOptions) + }, httputil.WithAllowGuests())).Methods(http.MethodGet, http.MethodOptions) v3mux.Handle("/rooms/{roomId}/context/{eventId}", httputil.MakeAuthAPI(gomatrixserverlib.Join, userAPI, func(req *http.Request, device *userapi.Device) util.JSONResponse { @@ -108,7 +108,7 @@ func Setup( vars["roomId"], vars["eventId"], lazyLoadCache, ) - }), + }, httputil.WithAllowGuests()), ).Methods(http.MethodGet, http.MethodOptions) v1unstablemux.Handle("/rooms/{roomId}/relations/{eventId}", @@ -122,7 +122,7 @@ func Setup( req, device, syncDB, rsAPI, vars["roomId"], vars["eventId"], "", "", ) - }), + }, httputil.WithAllowGuests()), ).Methods(http.MethodGet, http.MethodOptions) v1unstablemux.Handle("/rooms/{roomId}/relations/{eventId}/{relType}", @@ -136,7 +136,7 @@ func Setup( req, device, syncDB, rsAPI, vars["roomId"], vars["eventId"], vars["relType"], "", ) - }), + }, httputil.WithAllowGuests()), ).Methods(http.MethodGet, http.MethodOptions) v1unstablemux.Handle("/rooms/{roomId}/relations/{eventId}/{relType}/{eventType}", @@ -150,7 +150,7 @@ func Setup( req, device, syncDB, rsAPI, vars["roomId"], vars["eventId"], vars["relType"], vars["eventType"], ) - }), + }, httputil.WithAllowGuests()), ).Methods(http.MethodGet, http.MethodOptions) v3mux.Handle("/search", @@ -191,7 +191,7 @@ func Setup( at := req.URL.Query().Get("at") return GetMemberships(req, device, vars["roomID"], syncDB, rsAPI, false, membership, notMembership, at) - }), + }, httputil.WithAllowGuests()), ).Methods(http.MethodGet, http.MethodOptions) v3mux.Handle("/rooms/{roomID}/joined_members",