46 lines
1.4 KiB
Go
46 lines
1.4 KiB
Go
/*
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Copyright 2018 The Jetstack cert-manager contributors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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/*
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This file contains portions of code directly taken from the 'xenolf/lego' project.
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A copy of the license for this code can be found in the file named LICENSE in
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this directory.
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*/
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package util
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import (
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"fmt"
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"github.com/miekg/dns"
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)
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// DNS01Record returns a DNS record which will fulfill the `dns-01` challenge
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// TODO: move this into a non-generic place by resolving import cycle in dns package
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func DNS01Record(domain, value string) (string, string, int, error) {
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fqdn := fmt.Sprintf("_acme-challenge.%s.", domain)
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// Check if the domain has CNAME then return that
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r, err := dnsQuery(fqdn, dns.TypeCNAME, RecursiveNameservers, true)
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if err == nil && r.Rcode == dns.RcodeSuccess {
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fqdn = updateDomainWithCName(r, fqdn)
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}
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if err != nil {
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return "", "", 0, err
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}
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return fqdn, value, 60, nil
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}
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