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