2018-04-03 16:22:13 +02:00
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package fastdns
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import (
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2018-09-15 19:07:24 +02:00
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"errors"
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"fmt"
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"reflect"
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"time"
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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/acme"
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"github.com/xenolf/lego/platform/config/env"
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)
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2018-09-15 19:07:24 +02:00
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// Config is used to configure the creation of the DNSProvider
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type Config struct {
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edgegrid.Config
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PropagationTimeout time.Duration
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PollingInterval time.Duration
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TTL int
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}
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// NewDefaultConfig returns a default configuration for the DNSProvider
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func NewDefaultConfig() *Config {
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return &Config{
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PropagationTimeout: env.GetOrDefaultSecond("AKAMAI_PROPAGATION_TIMEOUT", acme.DefaultPropagationTimeout),
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PollingInterval: env.GetOrDefaultSecond("AKAMAI_POLLING_INTERVAL", acme.DefaultPollingInterval),
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TTL: env.GetOrDefaultInt("AKAMAI_TTL", 120),
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}
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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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config *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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values, err := env.Get("AKAMAI_HOST", "AKAMAI_CLIENT_TOKEN", "AKAMAI_CLIENT_SECRET", "AKAMAI_ACCESS_TOKEN")
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if err != nil {
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return nil, fmt.Errorf("fastdns: %v", err)
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}
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config := NewDefaultConfig()
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config.Config = edgegrid.Config{
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Host: values["AKAMAI_HOST"],
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ClientToken: values["AKAMAI_CLIENT_TOKEN"],
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ClientSecret: values["AKAMAI_CLIENT_SECRET"],
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AccessToken: values["AKAMAI_ACCESS_TOKEN"],
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MaxBody: 131072,
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}
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2018-09-15 19:07:24 +02:00
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return NewDNSProviderConfig(config)
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}
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// NewDNSProviderClient uses the supplied parameters
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// to return a DNSProvider instance configured for FastDNS.
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// Deprecated
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func NewDNSProviderClient(host, clientToken, clientSecret, accessToken string) (*DNSProvider, error) {
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config := NewDefaultConfig()
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config.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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2018-09-15 19:07:24 +02:00
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return NewDNSProviderConfig(config)
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}
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// NewDNSProviderConfig return a DNSProvider instance configured for FastDNS.
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func NewDNSProviderConfig(config *Config) (*DNSProvider, error) {
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if config == nil {
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return nil, errors.New("fastdns: the configuration of the DNS provider is nil")
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}
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if config.ClientToken == "" || config.ClientSecret == "" || config.AccessToken == "" || config.Host == "" {
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return nil, fmt.Errorf("FastDNS credentials are missing")
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}
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return &DNSProvider{config: config}, 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 (d *DNSProvider) Present(domain, token, keyAuth string) error {
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fqdn, value, _ := acme.DNS01Record(domain, keyAuth)
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zoneName, recordName, err := d.findZoneAndRecordName(fqdn, domain)
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if err != nil {
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return fmt.Errorf("fastdns: %v", err)
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}
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configdns.Init(d.config.Config)
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zone, err := configdns.GetZone(zoneName)
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if err != nil {
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return fmt.Errorf("fastdns: %v", 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", d.config.TTL)
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record.SetField("target", value)
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record.SetField("active", true)
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existingRecord := d.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 d.createRecord(zone, record)
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}
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return d.createRecord(zone, record)
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}
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// CleanUp removes the record matching the specified parameters.
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func (d *DNSProvider) CleanUp(domain, token, keyAuth string) error {
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fqdn, _, _ := acme.DNS01Record(domain, keyAuth)
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zoneName, recordName, err := d.findZoneAndRecordName(fqdn, domain)
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if err != nil {
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return fmt.Errorf("fastdns: %v", err)
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}
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2018-09-15 19:07:24 +02:00
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configdns.Init(d.config.Config)
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zone, err := configdns.GetZone(zoneName)
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if err != nil {
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return fmt.Errorf("fastdns: %v", err)
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}
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existingRecord := d.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 fmt.Errorf("fastdns: %v", 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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2018-09-15 19:07:24 +02:00
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// Timeout returns the timeout and interval to use when checking for DNS propagation.
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// Adjusting here to cope with spikes in propagation times.
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func (d *DNSProvider) Timeout() (timeout, interval time.Duration) {
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return d.config.PropagationTimeout, d.config.PollingInterval
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}
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2018-06-21 19:06:16 +02:00
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func (d *DNSProvider) findZoneAndRecordName(fqdn, domain string) (string, string, error) {
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zone, err := acme.FindZoneByFqdn(acme.ToFqdn(domain), acme.RecursiveNameservers)
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if err != nil {
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return "", "", err
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}
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zone = acme.UnFqdn(zone)
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name := acme.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 (d *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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2018-06-21 19:06:16 +02:00
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func (d *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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