mirror of
https://github.com/coredns/coredns.git
synced 2025-11-04 03:03:14 -05:00
296222d613
Make this vastly simpler and more efficient. Adding all the bytes and then letting loose fnv doesn't add anything and may actually do the wrong thing. See: #3953 Fixes: #3953 Signed-off-by: Miek Gieben <miek@miek.nl>
28 lines
697 B
Go
28 lines
697 B
Go
package dnssec
|
|
|
|
import (
|
|
"hash/fnv"
|
|
"io"
|
|
"strconv"
|
|
"strings"
|
|
|
|
"github.com/miekg/dns"
|
|
)
|
|
|
|
// hash serializes the RRset and returns a signature cache key.
|
|
func hash(rrs []dns.RR) uint64 {
|
|
h := fnv.New64()
|
|
// Only need this to be unique for ownername + qtype (+class), but we
|
|
// only care about IN. Its already an RRSet, so the ownername is the
|
|
// same as is the qtype. Take the first one and construct the hash
|
|
// string that creates the key
|
|
io.WriteString(h, strings.ToLower(rrs[0].Header().Name))
|
|
typ, ok := dns.TypeToString[rrs[0].Header().Rrtype]
|
|
if !ok {
|
|
typ = "TYPE" + strconv.FormatUint(uint64(rrs[0].Header().Rrtype), 10)
|
|
}
|
|
io.WriteString(h, typ)
|
|
i := h.Sum64()
|
|
return i
|
|
}
|