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// Package rrutil provides function to find certain RRs in slices.
package rrutil
import "github.com/miekg/dns"
// SubTypeSignature returns the RRSIG for the subtype.
func SubTypeSignature(rrs []dns.RR, subtype uint16) []dns.RR {
sigs := []dns.RR{}
// there may be multiple keys that have signed this subtype
for _, sig := range rrs {
if s, ok := sig.(*dns.RRSIG); ok {
if s.TypeCovered == subtype {
sigs = append(sigs, s)
}
}
}
return sigs
}
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