package internal import ( "context" "fmt" "time" "github.com/matrix-org/dendrite/federationapi/api" "github.com/matrix-org/gomatrixserverlib" "github.com/matrix-org/util" ) // QueryJoinedHostServerNamesInRoom implements api.FederationInternalAPI func (f *FederationInternalAPI) QueryJoinedHostServerNamesInRoom( ctx context.Context, request *api.QueryJoinedHostServerNamesInRoomRequest, response *api.QueryJoinedHostServerNamesInRoomResponse, ) (err error) { joinedHosts, err := f.db.GetJoinedHostsForRooms(ctx, []string{request.RoomID}, request.ExcludeSelf) if err != nil { return } response.ServerNames = joinedHosts return } func (a *FederationInternalAPI) fetchServerKeysDirectly(ctx context.Context, serverName gomatrixserverlib.ServerName) (*gomatrixserverlib.ServerKeys, error) { ctx, cancel := context.WithTimeout(ctx, time.Second*30) defer cancel() ires, err := a.doRequestIfNotBackingOffOrBlacklisted(serverName, func() (interface{}, error) { return a.federation.GetServerKeys(ctx, serverName) }) if err != nil { return nil, err } sks := ires.(gomatrixserverlib.ServerKeys) return &sks, nil } func (a *FederationInternalAPI) fetchServerKeysFromCache( ctx context.Context, req *api.QueryServerKeysRequest, ) ([]gomatrixserverlib.ServerKeys, error) { var results []gomatrixserverlib.ServerKeys for keyID, criteria := range req.KeyIDToCriteria { serverKeysResponses, _ := a.db.GetNotaryKeys(ctx, req.ServerName, []gomatrixserverlib.KeyID{keyID}) if len(serverKeysResponses) == 0 { return nil, fmt.Errorf("failed to find server key response for key ID %s", keyID) } // we should only get 1 result as we only gave 1 key ID sk := serverKeysResponses[0] util.GetLogger(ctx).Infof("fetchServerKeysFromCache: minvalid:%v keys: %+v", criteria.MinimumValidUntilTS, sk) if criteria.MinimumValidUntilTS != 0 { // check if it's still valid. if they have the same value that's also valid if sk.ValidUntilTS < criteria.MinimumValidUntilTS { return nil, fmt.Errorf( "found server response for key ID %s but it is no longer valid, min: %v valid_until: %v", keyID, criteria.MinimumValidUntilTS, sk.ValidUntilTS, ) } } results = append(results, sk) } return results, nil } func (a *FederationInternalAPI) QueryServerKeys( ctx context.Context, req *api.QueryServerKeysRequest, res *api.QueryServerKeysResponse, ) error { // attempt to satisfy the entire request from the cache first results, err := a.fetchServerKeysFromCache(ctx, req) if err == nil { // satisfied entirely from cache, return it res.ServerKeys = results return nil } util.GetLogger(ctx).WithField("server", req.ServerName).WithError(err).Warn("notary: failed to satisfy keys request entirely from cache, hitting direct") serverKeys, err := a.fetchServerKeysDirectly(ctx, req.ServerName) if err != nil { // try to load as much as we can from the cache in a best effort basis util.GetLogger(ctx).WithField("server", req.ServerName).WithError(err).Warn("notary: failed to ask server for keys, returning best effort keys") serverKeysResponses, dbErr := a.db.GetNotaryKeys(ctx, req.ServerName, req.KeyIDs()) if dbErr != nil { return fmt.Errorf("notary: server returned %s, and db returned %s", err, dbErr) } res.ServerKeys = serverKeysResponses return nil } // cache it! if err = a.db.UpdateNotaryKeys(context.Background(), req.ServerName, *serverKeys); err != nil { // non-fatal, still return the response util.GetLogger(ctx).WithError(err).Warn("failed to UpdateNotaryKeys") } res.ServerKeys = []gomatrixserverlib.ServerKeys{*serverKeys} return nil }