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// Package dnsimple implements a DNS provider for solving the DNS-01 challenge
// using dnsimple DNS.
package dnsimple
import (
"fmt"
"os"
"strings"
"github.com/weppos/dnsimple-go/dnsimple"
"github.com/xenolf/lego/acme"
)
// DNSProvider is an implementation of the acme.ChallengeProvider interface.
type DNSProvider struct {
client *dnsimple.Client
}
// NewDNSProvider returns a DNSProvider instance configured for dnsimple.
// Credentials must be passed in the environment variables: DNSIMPLE_EMAIL
// and DNSIMPLE_API_KEY.
func NewDNSProvider() (*DNSProvider, error) {
email := os.Getenv("DNSIMPLE_EMAIL")
key := os.Getenv("DNSIMPLE_API_KEY")
return NewDNSProviderCredentials(email, key)
}
// NewDNSProviderCredentials uses the supplied credentials to return a
// DNSProvider instance configured for dnsimple.
func NewDNSProviderCredentials(email, key string) (*DNSProvider, error) {
if email == "" || key == "" {
return nil, fmt.Errorf("DNSimple credentials missing")
}
return &DNSProvider{
client: dnsimple.NewClient(key, email),
}, nil
}
// Present creates a TXT record to fulfil the dns-01 challenge.
func (c *DNSProvider) Present(domain, token, keyAuth string) error {
fqdn, value, ttl := acme.DNS01Record(domain, keyAuth)
zoneID, zoneName, err := c.getHostedZone(domain)
if err != nil {
return err
}
recordAttributes := c.newTxtRecord(zoneName, fqdn, value, ttl)
_, _, err = c.client.Domains.CreateRecord(zoneID, *recordAttributes)
if err != nil {
return fmt.Errorf("DNSimple API call failed: %v", err)
}
return nil
}
// CleanUp removes the TXT record matching the specified parameters.
func (c *DNSProvider) CleanUp(domain, token, keyAuth string) error {
fqdn, _, _ := acme.DNS01Record(domain, keyAuth)
records, err := c.findTxtRecords(domain, fqdn)
if err != nil {
return err
}
for _, rec := range records {
_, err := c.client.Domains.DeleteRecord(rec.DomainId, rec.Id)
if err != nil {
return err
}
}
return nil
}
func (c *DNSProvider) getHostedZone(domain string) (string, string, error) {
zones, _, err := c.client.Domains.List()
if err != nil {
return "", "", fmt.Errorf("DNSimple API call failed: %v", err)
}
authZone, err := acme.FindZoneByFqdn(acme.ToFqdn(domain), acme.RecursiveNameservers)
if err != nil {
return "", "", err
}
var hostedZone dnsimple.Domain
for _, zone := range zones {
if zone.Name == acme.UnFqdn(authZone) {
hostedZone = zone
}
}
if hostedZone.Id == 0 {
return "", "", fmt.Errorf("Zone %s not found in DNSimple for domain %s", authZone, domain)
}
return fmt.Sprintf("%v", hostedZone.Id), hostedZone.Name, nil
}
func (c *DNSProvider) findTxtRecords(domain, fqdn string) ([]dnsimple.Record, error) {
zoneID, zoneName, err := c.getHostedZone(domain)
if err != nil {
return nil, err
}
var records []dnsimple.Record
result, _, err := c.client.Domains.ListRecords(zoneID, "", "TXT")
if err != nil {
return records, fmt.Errorf("DNSimple API call has failed: %v", err)
}
recordName := c.extractRecordName(fqdn, zoneName)
for _, record := range result {
if record.Name == recordName {
records = append(records, record)
}
}
return records, nil
}
func (c *DNSProvider) newTxtRecord(zone, fqdn, value string, ttl int) *dnsimple.Record {
name := c.extractRecordName(fqdn, zone)
return &dnsimple.Record{
Type: "TXT",
Name: name,
Content: value,
TTL: ttl,
}
}
func (c *DNSProvider) extractRecordName(fqdn, domain string) string {
name := acme.UnFqdn(fqdn)
if idx := strings.Index(name, "."+domain); idx != -1 {
return name[:idx]
}
return name
}
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