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gotd: add time synchronization

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This commit is contained in:
Tulir Asokan
2026-02-26 18:24:48 +02:00
parent 93fe3cb0ea
commit 6af986ded5
15 changed files with 110 additions and 48 deletions
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pkg/gotd/mtproto/read.go
+10 -7
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@@ -38,12 +38,14 @@ func checkMessageID(now time.Time, rawID int64) error {
return errors.Wrapf(errRejected, "unexpected type %s", id.Type())
}
created := id.Time()
if created.Before(now) && now.Sub(created) > maxPast {
return errors.Wrap(errRejected, "created too far in past")
}
if created.Sub(now) > maxFuture {
return errors.Wrap(errRejected, "created too far in future")
if !now.IsZero() {
created := id.Time()
if created.Before(now) && now.Sub(created) > maxPast {
return errors.Wrap(errRejected, "created too far in past")
}
if created.Sub(now) > maxFuture {
return errors.Wrap(errRejected, "created too far in future")
}
}
return nil
@@ -60,7 +62,8 @@ func (c *Conn) decryptMessage(b *bin.Buffer) (*crypto.EncryptedMessageData, erro
if msg.SessionID != session.ID {
return nil, errors.Wrapf(errRejected, "invalid session (got %d, expected %d)", msg.SessionID, session.ID)
}
if err := checkMessageID(c.clock.Now(), msg.MessageID); err != nil {
if err := checkMessageID(c.altTimeWithOffset(), msg.MessageID); err != nil {
return nil, errors.Wrapf(err, "bad message id %d", msg.MessageID)
}
if !c.messageIDBuf.Consume(msg.MessageID) {