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lego/challenge/dns01/cname.go
Oli 3cd3024561
fix: ensure case-insensitive comparison of CNAME records (#1956)
Co-authored-by: Fernandez Ludovic <ldez@users.noreply.github.com>
2023-07-19 10:45:10 +00:00

21 lines
320 B
Go

package dns01
import (
"strings"
"github.com/miekg/dns"
)
// Update FQDN with CNAME if any.
func updateDomainWithCName(r *dns.Msg, fqdn string) string {
for _, rr := range r.Answer {
if cn, ok := rr.(*dns.CNAME); ok {
if strings.EqualFold(cn.Hdr.Name, fqdn) {
return cn.Target
}
}
}
return fqdn
}