1aa1a92198
This adds an online dnssec middleware. The middleware will sign responses on the fly. Negative responses are signed with NSEC black lies.
24 lines
899 B
Go
24 lines
899 B
Go
package dnssec
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import "github.com/miekg/dns"
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// nsec returns an NSEC useful for NXDOMAIN respsones.
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// See https://tools.ietf.org/html/draft-valsorda-dnsop-black-lies-00
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// For example, a request for the non-existing name a.example.com would
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// cause the following NSEC record to be generated:
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// a.example.com. 3600 IN NSEC \000.a.example.com. ( RRSIG NSEC )
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// This inturn makes every NXDOMAIN answer a NODATA one, don't forget to flip
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// the header rcode to NOERROR.
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func (d Dnssec) nsec(name, zone string, ttl, incep, expir uint32) ([]dns.RR, error) {
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nsec := &dns.NSEC{}
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nsec.Hdr = dns.RR_Header{Name: name, Ttl: ttl, Class: dns.ClassINET, Rrtype: dns.TypeNSEC}
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nsec.NextDomain = "\\000." + name
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nsec.TypeBitMap = []uint16{dns.TypeRRSIG, dns.TypeNSEC}
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sigs, err := d.sign([]dns.RR{nsec}, zone, ttl, incep, expir)
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if err != nil {
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return nil, err
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}
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return append(sigs, nsec), nil
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}
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