mirror of
https://github.com/matrix-org/dendrite
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bb2380c254
* Allow specifying max age for caches * Evict cache entry if it's found to be stale when we call Get * Fix bugs
57 lines
2.1 KiB
Go
57 lines
2.1 KiB
Go
package caching
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import (
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"fmt"
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"github.com/matrix-org/gomatrixserverlib"
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)
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const (
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ServerKeyCacheName = "server_key"
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ServerKeyCacheMaxEntries = 4096
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ServerKeyCacheMutable = true
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ServerKeyCacheMaxAge = CacheNoMaxAge
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)
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// ServerKeyCache contains the subset of functions needed for
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// a server key cache.
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type ServerKeyCache interface {
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// request -> timestamp is emulating gomatrixserverlib.FetchKeys:
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// https://github.com/matrix-org/gomatrixserverlib/blob/f69539c86ea55d1e2cc76fd8e944e2d82d30397c/keyring.go#L95
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// The timestamp should be the timestamp of the event that is being
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// verified. We will not return keys from the cache that are not valid
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// at this timestamp.
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GetServerKey(request gomatrixserverlib.PublicKeyLookupRequest, timestamp gomatrixserverlib.Timestamp) (response gomatrixserverlib.PublicKeyLookupResult, ok bool)
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// request -> result is emulating gomatrixserverlib.StoreKeys:
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// https://github.com/matrix-org/gomatrixserverlib/blob/f69539c86ea55d1e2cc76fd8e944e2d82d30397c/keyring.go#L112
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StoreServerKey(request gomatrixserverlib.PublicKeyLookupRequest, response gomatrixserverlib.PublicKeyLookupResult)
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}
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func (c Caches) GetServerKey(
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request gomatrixserverlib.PublicKeyLookupRequest,
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timestamp gomatrixserverlib.Timestamp,
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) (gomatrixserverlib.PublicKeyLookupResult, bool) {
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key := fmt.Sprintf("%s/%s", request.ServerName, request.KeyID)
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val, found := c.ServerKeys.Get(key)
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if found && val != nil {
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if keyLookupResult, ok := val.(gomatrixserverlib.PublicKeyLookupResult); ok {
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if !keyLookupResult.WasValidAt(timestamp, true) {
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// The key wasn't valid at the requested timestamp so don't
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// return it. The caller will have to work out what to do.
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c.ServerKeys.Unset(key)
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return gomatrixserverlib.PublicKeyLookupResult{}, false
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}
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return keyLookupResult, true
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}
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}
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return gomatrixserverlib.PublicKeyLookupResult{}, false
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}
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func (c Caches) StoreServerKey(
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request gomatrixserverlib.PublicKeyLookupRequest,
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response gomatrixserverlib.PublicKeyLookupResult,
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) {
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key := fmt.Sprintf("%s/%s", request.ServerName, request.KeyID)
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c.ServerKeys.Set(key, response)
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}
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