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Ignore state events with invalid signatures when joining rooms (#1407)

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* Use state from RespSendJoin post-check

* Don't create input events for invalid events

* Let's try this again

* Update gomatrixserverlib

* Update gomatrixserverlib to matrix-org/gomatrixserverlib@38f437f
This commit is contained in:
Neil Alexander 2020-09-07 16:54:51 +01:00 • committed by GitHub
parent c992f4f1f4
commit 1602df8752
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GPG key ID: 4AEE18F83AFDEB23
4 changed files with 14 additions and 12 deletions
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11
federationsender/internal/perform.go
View file

@ -185,20 +185,21 @@ func (r *FederationSenderInternalAPI) performJoinUsingServer(
// Check that the send_join response was valid.
joinCtx := perform.JoinContext(r.federation, r.keyRing)
if err = joinCtx.CheckSendJoinResponse(
respState, err := joinCtx.CheckSendJoinResponse(
ctx, event, serverName, respMakeJoin, respSendJoin,
); err != nil {
)
if err != nil {
return fmt.Errorf("joinCtx.CheckSendJoinResponse: %w", err)
}
// If we successfully performed a send_join above then the other
// server now thinks we're a part of the room. Send the newly
// returned state to the roomserver to update our local view.
respState := respSendJoin.ToRespState()
if err = roomserverAPI.SendEventWithState(
ctx, r.rsAPI,
&respState,
event.Headered(respMakeJoin.RoomVersion), nil,
respState,
event.Headered(respMakeJoin.RoomVersion),
nil,
); err != nil {
return fmt.Errorf("r.producer.SendEventWithState: %w", err)
}

9
federationsender/internal/perform/join.go
View file

@ -30,7 +30,7 @@ func (r joinContext) CheckSendJoinResponse(
server gomatrixserverlib.ServerName,
respMakeJoin gomatrixserverlib.RespMakeJoin,
respSendJoin gomatrixserverlib.RespSendJoin,
) error {
) (*gomatrixserverlib.RespState, error) {
// A list of events that we have retried, if they were not included in
// the auth events supplied in the send_join.
retries := map[string][]gomatrixserverlib.Event{}
@ -97,8 +97,9 @@ func (r joinContext) CheckSendJoinResponse(
// TODO: Can we expand Check here to return a list of missing auth
// events rather than failing one at a time?
if err := respSendJoin.Check(ctx, r.keyRing, event, missingAuth); err != nil {
return fmt.Errorf("respSendJoin: %w", err)
rs, err := respSendJoin.Check(ctx, r.keyRing, event, missingAuth)
if err != nil {
return nil, fmt.Errorf("respSendJoin: %w", err)
}
return nil
return rs, nil
}