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federation/eventauth: fix default power levels in pre-v12 rooms

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This commit is contained in:
Tulir Asokan 2025-09-26 23:18:05 +03:00
commit a3c6832c48
1 changed files with 15 additions and 9 deletions
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24
federation/eventauth/eventauth.go
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@ -733,23 +733,27 @@ func findEventAndReadString(events []*pdu.PDU, evtType, stateKey, fieldPath, def
func getPowerLevels(roomVersion id.RoomVersion, authEvents []*pdu.PDU, createEvt *pdu.PDU) (*event.PowerLevelsEventContent, error) {
var err error
powerLevels := findEventAndReadData(authEvents, event.StatePowerLevels.Type, "", func(evt *pdu.PDU) (out event.PowerLevelsEventContent) {
powerLevels := findEventAndReadData(authEvents, event.StatePowerLevels.Type, "", func(evt *pdu.PDU) *event.PowerLevelsEventContent {
if evt == nil {
return
return nil
}
content := evt.Content
out := &event.PowerLevelsEventContent{}
if !roomVersion.ValidatePowerLevelInts() {
safeParsePowerLevels(content, &out)
safeParsePowerLevels(content, out)
} else {
err = json.Unmarshal(content, &out)
err = json.Unmarshal(content, out)
}
return
return out
})
if err != nil {
// This should never happen thanks to safeParsePowerLevels for v1-9 and strict validation in v10+
return nil, fmt.Errorf("%w: %w", ErrFailedToParsePowerLevels, err)
}
if roomVersion.PrivilegedRoomCreators() {
if powerLevels == nil {
powerLevels = &event.PowerLevelsEventContent{}
}
powerLevels.CreateEvent, err = createEvt.ToClientEvent(roomVersion)
if err != nil {
return nil, fmt.Errorf("%w: %w", ErrFailedToParsePowerLevels, err)
@ -758,12 +762,14 @@ func getPowerLevels(roomVersion id.RoomVersion, authEvents []*pdu.PDU, createEvt
if err != nil {
return nil, fmt.Errorf("%w: %w", ErrFailedToParsePowerLevels, err)
}
} else {
powerLevels.Users = map[id.UserID]int{
createEvt.Sender: (1 << 53) - 1,
} else if powerLevels == nil {
powerLevels = &event.PowerLevelsEventContent{
Users: map[id.UserID]int{
createEvt.Sender: 100,
},
}
}
return &powerLevels, nil
return powerLevels, nil
}
func parseIntWithVersion(roomVersion id.RoomVersion, val gjson.Result) *int {