diff options
| -rw-r--r-- | src/resolve/resolved-dns-dnssec.c | 37 |
1 files changed, 25 insertions, 12 deletions
diff --git a/src/resolve/resolved-dns-dnssec.c b/src/resolve/resolved-dns-dnssec.c index 1f48f588ce..b71aee37d9 100644 --- a/src/resolve/resolved-dns-dnssec.c +++ b/src/resolve/resolved-dns-dnssec.c @@ -1458,19 +1458,20 @@ found_zone: found_closest_encloser: /* We found a closest encloser in 'p'; next closer is 'pp' */ - /* Ensure this is not a DNAME domain, see RFC5155, section 8.3. */ - if (bitmap_isset(enclosure_rr->nsec3.types, DNS_TYPE_DNAME)) - return -EBADMSG; - - /* Ensure that this data is from the delegated domain - * (i.e. originates from the "lower" DNS server), and isn't - * just glue records (i.e. doesn't originate from the "upper" - * DNS server). */ - if (bitmap_isset(enclosure_rr->nsec3.types, DNS_TYPE_NS) && - !bitmap_isset(enclosure_rr->nsec3.types, DNS_TYPE_SOA)) - return -EBADMSG; - if (!pp) { + /* We have an exact match! If we area looking for a DS RR, then we must insist that we got the NSEC3 RR + * from the parent. Otherwise the one from the child. Do so, by checking whether SOA and NS are + * appropriately set. */ + + if (key->type == DNS_TYPE_DS) { + if (bitmap_isset(enclosure_rr->nsec3.types, DNS_TYPE_SOA)) + return -EBADMSG; + } else { + if (bitmap_isset(enclosure_rr->nsec3.types, DNS_TYPE_NS) && + !bitmap_isset(enclosure_rr->nsec3.types, DNS_TYPE_SOA)) + return -EBADMSG; + } + /* No next closer NSEC3 RR. That means there's a direct NSEC3 RR for our key. */ if (bitmap_isset(enclosure_rr->nsec3.types, key->type)) *result = DNSSEC_NSEC_FOUND; @@ -1487,6 +1488,18 @@ found_closest_encloser: return 0; } + /* Ensure this is not a DNAME domain, see RFC5155, section 8.3. */ + if (bitmap_isset(enclosure_rr->nsec3.types, DNS_TYPE_DNAME)) + return -EBADMSG; + + /* Ensure that this data is from the delegated domain + * (i.e. originates from the "lower" DNS server), and isn't + * just glue records (i.e. doesn't originate from the "upper" + * DNS server). */ + if (bitmap_isset(enclosure_rr->nsec3.types, DNS_TYPE_NS) && + !bitmap_isset(enclosure_rr->nsec3.types, DNS_TYPE_SOA)) + return -EBADMSG; + /* Prove that there is no next closer and whether or not there is a wildcard domain. */ wildcard = strjoina("*.", p); |