If the parent zone uses a non-opt-out method that provides authenticated
negative DS replies, we still can't expect signatures from the child
zone. sd-resolved was using the authenticated status of the DS reply to
require signatures for CNAMEs, even though it had already proved that no
signature exists.
Fixes: 47690634f157 ("resolved: don't request the SOA for every dns label")
if (r == 0)
continue;
- return FLAGS_SET(dt->answer_query_flags, SD_RESOLVED_AUTHENTICATED);
+ if (!FLAGS_SET(dt->answer_query_flags, SD_RESOLVED_AUTHENTICATED))
+ return false;
+
+ /* We expect this to be signed when the DS record exists, and don't expect it to be
+ * signed when the DS record is proven not to exist. */
+ return dns_answer_match_key(dt->answer, dns_transaction_key(dt), NULL);
}
return true;