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Consider old keys in handleLocalKeys (#1454)

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Neil Alexander 2020-09-30 19:52:36 +01:00 committed by GitHub
parent 05e5386fb0
commit 0caad67abc
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2 changed files with 31 additions and 3 deletions
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33
serverkeyapi/internal/api.go
View file

@ -6,6 +6,7 @@ import (
"fmt"
"time"
"github.com/matrix-org/dendrite/internal/config"
"github.com/matrix-org/dendrite/serverkeyapi/api"
"github.com/matrix-org/gomatrixserverlib"
"github.com/sirupsen/logrus"
@ -18,6 +19,7 @@ type ServerKeyAPI struct {
ServerPublicKey ed25519.PublicKey
ServerKeyID gomatrixserverlib.KeyID
ServerKeyValidity time.Duration
OldServerKeys []config.OldVerifyKeys
OurKeyRing gomatrixserverlib.KeyRing
FedClient gomatrixserverlib.KeyClient
@ -112,14 +114,17 @@ func (s *ServerKeyAPI) FetcherName() string {
}
// handleLocalKeys handles cases where the key request contains
// a request for our own server keys.
// a request for our own server keys, either current or old.
func (s *ServerKeyAPI) handleLocalKeys(
_ context.Context,
requests map[gomatrixserverlib.PublicKeyLookupRequest]gomatrixserverlib.Timestamp,
results map[gomatrixserverlib.PublicKeyLookupRequest]gomatrixserverlib.PublicKeyLookupResult,
) {
for req := range requests {
if req.ServerName == s.ServerName {
if req.ServerName != s.ServerName {
continue
}
if req.KeyID == s.ServerKeyID {
// We found a key request that is supposed to be for our own
// keys. Remove it from the request list so we don't hit the
// database or the fetchers for it.
@ -133,6 +138,28 @@ func (s *ServerKeyAPI) handleLocalKeys(
ExpiredTS: gomatrixserverlib.PublicKeyNotExpired,
ValidUntilTS: gomatrixserverlib.AsTimestamp(time.Now().Add(s.ServerKeyValidity)),
}
} else {
// The key request doesn't match our current key. Let's see
// if it matches any of our old verify keys.
for _, oldVerifyKey := range s.OldServerKeys {
if req.KeyID == oldVerifyKey.KeyID {
// We found a key request that is supposed to be an expired
// key.
delete(requests, req)
// Insert our own key into the response.
results[req] = gomatrixserverlib.PublicKeyLookupResult{
VerifyKey: gomatrixserverlib.VerifyKey{
Key: gomatrixserverlib.Base64Bytes(oldVerifyKey.PrivateKey.Public().(ed25519.PublicKey)),
},
ExpiredTS: oldVerifyKey.ExpiredAt,
ValidUntilTS: gomatrixserverlib.PublicKeyNotValid,
}
// No need to look at the other keys.
break
}
}
}
}
}
@ -175,7 +202,7 @@ func (s *ServerKeyAPI) handleDatabaseKeys(
// the remaining requests.
func (s *ServerKeyAPI) handleFetcherKeys(
ctx context.Context,
now gomatrixserverlib.Timestamp,
_ gomatrixserverlib.Timestamp,
fetcher gomatrixserverlib.KeyFetcher,
requests map[gomatrixserverlib.PublicKeyLookupRequest]gomatrixserverlib.Timestamp,
results map[gomatrixserverlib.PublicKeyLookupRequest]gomatrixserverlib.PublicKeyLookupResult,

1
serverkeyapi/serverkeyapi.go
View file

@ -49,6 +49,7 @@ func NewInternalAPI(
ServerPublicKey: cfg.Matrix.PrivateKey.Public().(ed25519.PublicKey),
ServerKeyID: cfg.Matrix.KeyID,
ServerKeyValidity: cfg.Matrix.KeyValidityPeriod,
OldServerKeys: cfg.Matrix.OldVerifyKeys,
FedClient: fedClient,
OurKeyRing: gomatrixserverlib.KeyRing{
KeyFetchers: []gomatrixserverlib.KeyFetcher{},