139 lines
3.5 KiB
Go
139 lines
3.5 KiB
Go
package fastdns
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import (
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"fmt"
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"os"
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"reflect"
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configdns "github.com/akamai/AkamaiOPEN-edgegrid-golang/configdns-v1"
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"github.com/akamai/AkamaiOPEN-edgegrid-golang/edgegrid"
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"github.com/xenolf/lego/acmev2"
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)
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// DNSProvider is an implementation of the acmev2.ChallengeProvider interface.
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type DNSProvider struct {
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config edgegrid.Config
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}
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// NewDNSProvider uses the supplied environment variables to return a DNSProvider instance:
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// AKAMAI_HOST, AKAMAI_CLIENT_TOKEN, AKAMAI_CLIENT_SECRET, AKAMAI_ACCESS_TOKEN
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func NewDNSProvider() (*DNSProvider, error) {
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host := os.Getenv("AKAMAI_HOST")
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clientToken := os.Getenv("AKAMAI_CLIENT_TOKEN")
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clientSecret := os.Getenv("AKAMAI_CLIENT_SECRET")
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accessToken := os.Getenv("AKAMAI_ACCESS_TOKEN")
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return NewDNSProviderClient(host, clientToken, clientSecret, accessToken)
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}
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// NewDNSProviderClient uses the supplied parameters to return a DNSProvider instance
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// configured for FastDNS.
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func NewDNSProviderClient(host, clientToken, clientSecret, accessToken string) (*DNSProvider, error) {
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if clientToken == "" || clientSecret == "" || accessToken == "" || host == "" {
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return nil, fmt.Errorf("Akamai FastDNS credentials missing")
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}
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config := edgegrid.Config{
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Host: host,
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ClientToken: clientToken,
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ClientSecret: clientSecret,
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AccessToken: accessToken,
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MaxBody: 131072,
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}
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return &DNSProvider{
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config: config,
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}, nil
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}
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// Present creates a TXT record to fullfil the dns-01 challenge.
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func (c *DNSProvider) Present(domain, token, keyAuth string) error {
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fqdn, value, ttl := acmev2.DNS01Record(domain, keyAuth)
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zoneName, recordName, err := c.findZoneAndRecordName(fqdn, domain)
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if err != nil {
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return err
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}
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configdns.Init(c.config)
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zone, err := configdns.GetZone(zoneName)
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if err != nil {
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return err
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}
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record := configdns.NewTxtRecord()
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record.SetField("name", recordName)
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record.SetField("ttl", ttl)
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record.SetField("target", value)
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record.SetField("active", true)
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existingRecord := c.findExistingRecord(zone, recordName)
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if existingRecord != nil {
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if reflect.DeepEqual(existingRecord.ToMap(), record.ToMap()) {
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return nil
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}
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zone.RemoveRecord(existingRecord)
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return c.createRecord(zone, record)
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}
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return c.createRecord(zone, record)
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}
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// CleanUp removes the record matching the specified parameters.
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func (c *DNSProvider) CleanUp(domain, token, keyAuth string) error {
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fqdn, _, _ := acmev2.DNS01Record(domain, keyAuth)
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zoneName, recordName, err := c.findZoneAndRecordName(fqdn, domain)
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if err != nil {
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return err
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}
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configdns.Init(c.config)
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zone, err := configdns.GetZone(zoneName)
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if err != nil {
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return err
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}
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existingRecord := c.findExistingRecord(zone, recordName)
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if existingRecord != nil {
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err := zone.RemoveRecord(existingRecord)
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if err != nil {
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return err
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}
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return zone.Save()
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}
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return nil
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}
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func (c *DNSProvider) findZoneAndRecordName(fqdn, domain string) (string, string, error) {
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zone, err := acmev2.FindZoneByFqdn(acmev2.ToFqdn(domain), acmev2.RecursiveNameservers)
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if err != nil {
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return "", "", err
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}
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zone = acmev2.UnFqdn(zone)
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name := acmev2.UnFqdn(fqdn)
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name = name[:len(name)-len("."+zone)]
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return zone, name, nil
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}
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func (c *DNSProvider) findExistingRecord(zone *configdns.Zone, recordName string) *configdns.TxtRecord {
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for _, r := range zone.Zone.Txt {
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if r.Name == recordName {
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return r
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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) createRecord(zone *configdns.Zone, record *configdns.TxtRecord) error {
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err := zone.AddRecord(record)
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if err != nil {
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return err
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}
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return zone.Save()
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}
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