package dnssec import ( "hash/fnv" "strconv" "github.com/miekg/dns" ) // Key serializes the RRset and return a signature cache key. func key(rrs []dns.RR) string { h := fnv.New64() buf := make([]byte, 256) for _, r := range rrs { off, err := dns.PackRR(r, buf, 0, nil, false) if err == nil { h.Write(buf[:off]) } } i := h.Sum64() return strconv.FormatUint(i, 10) }