duckdns: fix CNAME support (#1732)

CHANGELOG.md

@@ -12,6 +12,7 @@
 - **[dnsprovider]** pdns: notify secondary servers after updates
 
 ### Changed:
+
 - **[dnsprovider]** allinkl: removed deprecated sha1 hashing
 - **[dnsprovider]** auroradns: update authentification
 - **[dnsprovider]** dnspod: deprecated. Use Tencent Cloud instead.

providers/dns/duckdns/duckdns.go

@@ -79,13 +79,14 @@ func NewDNSProviderConfig(config *Config) (*DNSProvider, error) {
 
 // Present creates a TXT record to fulfill the dns-01 challenge.
 func (d *DNSProvider) Present(domain, token, keyAuth string) error {
-	_, txtRecord := dns01.GetRecord(domain, keyAuth)
-	return d.updateTxtRecord(domain, d.config.Token, txtRecord, false)
+	fqdn, txtRecord := dns01.GetRecord(domain, keyAuth)
+	return d.updateTxtRecord(dns01.UnFqdn(fqdn), d.config.Token, txtRecord, false)
 }
 
 // CleanUp clears DuckDNS TXT record.
 func (d *DNSProvider) CleanUp(domain, token, keyAuth string) error {
-	return d.updateTxtRecord(domain, d.config.Token, "", true)
+	fqdn, _ := dns01.GetRecord(domain, keyAuth)
+	return d.updateTxtRecord(dns01.UnFqdn(fqdn), d.config.Token, "", true)
 }
 
 // Timeout returns the timeout and interval to use when checking for DNS propagation.

providers/dns/duckdns/duckdns_test.go

@@ -107,32 +107,32 @@ func Test_getMainDomain(t *testing.T) {
 		},
 		{
 			desc:     "explicit domain: sub domain",
-			domain:   "sub.duckdns.org",
+			domain:   "_acme-challenge.sub.duckdns.org",
 			expected: "sub.duckdns.org",
 		},
 		{
 			desc:     "explicit domain: subsub domain",
-			domain:   "my.sub.duckdns.org",
+			domain:   "_acme-challenge.my.sub.duckdns.org",
 			expected: "sub.duckdns.org",
 		},
 		{
 			desc:     "explicit domain: subsubsub domain",
-			domain:   "my.sub.sub.duckdns.org",
+			domain:   "_acme-challenge.my.sub.sub.duckdns.org",
 			expected: "sub.duckdns.org",
 		},
 		{
 			desc:     "only subname: sub domain",
-			domain:   "sub",
+			domain:   "_acme-challenge.sub",
 			expected: "sub",
 		},
 		{
 			desc:     "only subname: subsub domain",
-			domain:   "my.sub",
+			domain:   "_acme-challenge.my.sub",
 			expected: "sub",
 		},
 		{
 			desc:     "only subname: subsubsub domain",
-			domain:   "my.sub.sub",
+			domain:   "_acme-challenge.my.sub.sub",
 			expected: "sub",
 		},
 	}