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>
27 lines
697 B
Go
27 lines
697 B
Go
package dnssec
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import (
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"hash/fnv"
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"io"
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"strconv"
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"strings"
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"github.com/miekg/dns"
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)
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// hash serializes the RRset and returns a signature cache key.
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func hash(rrs []dns.RR) uint64 {
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h := fnv.New64()
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// Only need this to be unique for ownername + qtype (+class), but we
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// only care about IN. Its already an RRSet, so the ownername is the
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// same as is the qtype. Take the first one and construct the hash
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// string that creates the key
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io.WriteString(h, strings.ToLower(rrs[0].Header().Name))
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typ, ok := dns.TypeToString[rrs[0].Header().Rrtype]
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if !ok {
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typ = "TYPE" + strconv.FormatUint(uint64(rrs[0].Header().Rrtype), 10)
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}
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io.WriteString(h, typ)
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i := h.Sum64()
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return i
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}
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