dendrite/internal/caching/cache_serverkeys.go

57 lines
2.1 KiB
Go
Raw Normal View History

2020-06-05 15:42:01 +00:00
package caching
import (
"fmt"
"github.com/matrix-org/gomatrixserverlib"
)
const (
ServerKeyCacheName = "server_key"
ServerKeyCacheMaxEntries = 4096
ServerKeyCacheMutable = true
)
// ServerKeyCache contains the subset of functions needed for
// a server key cache.
type ServerKeyCache interface {
// request -> timestamp is emulating gomatrixserverlib.FetchKeys:
// https://github.com/matrix-org/gomatrixserverlib/blob/f69539c86ea55d1e2cc76fd8e944e2d82d30397c/keyring.go#L95
// The timestamp should be the timestamp of the event that is being
// verified. We will not return keys from the cache that are not valid
// at this timestamp.
GetServerKey(request gomatrixserverlib.PublicKeyLookupRequest, timestamp gomatrixserverlib.Timestamp) (response gomatrixserverlib.PublicKeyLookupResult, ok bool)
// request -> result is emulating gomatrixserverlib.StoreKeys:
// https://github.com/matrix-org/gomatrixserverlib/blob/f69539c86ea55d1e2cc76fd8e944e2d82d30397c/keyring.go#L112
2020-06-05 15:42:01 +00:00
StoreServerKey(request gomatrixserverlib.PublicKeyLookupRequest, response gomatrixserverlib.PublicKeyLookupResult)
}
func (c Caches) GetServerKey(
request gomatrixserverlib.PublicKeyLookupRequest,
timestamp gomatrixserverlib.Timestamp,
2020-06-05 15:42:01 +00:00
) (gomatrixserverlib.PublicKeyLookupResult, bool) {
key := fmt.Sprintf("%s/%s", request.ServerName, request.KeyID)
val, found := c.ServerKeys.Get(key)
if found && val != nil {
if keyLookupResult, ok := val.(gomatrixserverlib.PublicKeyLookupResult); ok {
if !keyLookupResult.WasValidAt(timestamp, true) {
// The key wasn't valid at the requested timestamp so don't
// return it. The caller will have to work out what to do.
2020-06-12 10:07:26 +00:00
c.ServerKeys.Unset(key)
return gomatrixserverlib.PublicKeyLookupResult{}, false
}
2020-06-05 15:42:01 +00:00
return keyLookupResult, true
}
}
return gomatrixserverlib.PublicKeyLookupResult{}, false
}
func (c Caches) StoreServerKey(
request gomatrixserverlib.PublicKeyLookupRequest,
response gomatrixserverlib.PublicKeyLookupResult,
) {
key := fmt.Sprintf("%s/%s", request.ServerName, request.KeyID)
c.ServerKeys.Set(key, response)
}