lego/providers/dns/digitalocean/digitalocean.go
Ludovic Fernandez bba134ce87
Allow to configure TTL, interval and timeout (#634)
* feat: add GetOrDefaultXXX methods.
* refactor: configuration (alidns).
* refactor: configuration (azure).
* refactor: configuration (auroradns).
* refactor: configuration (bluecat).
* refactor: configuration (cloudflare).
* refactor: configuration (digitalocean).
* refactor: configuration (dnsimple).
* refactor: configuration (dnmadeeasy).
* refactor: configuration (dnspod).
* refactor: configuration (duckdns).
* refactor: configuration (dyn).
* refactor: configuration (exoscale).
* refactor: configuration (fastdns).
* refactor: configuration (gandi).
* refactor: configuration (gandiv5).
* refactor: configuration (gcloud).
* refactor: configuration (glesys).
* refactor: configuration (godaddy).
* refactor: configuration (iij).
* refactor: configuration (lightsail).
* refactor: configuration (linode).
* refactor: configuration (namecheap).
* refactor: configuration (namedotcom).
* refactor: configuration (netcup).
* refactor: configuration (nifcloud).
* refactor: configuration (ns1).
* refactor: configuration (otc).
* refactor: configuration (ovh).
* refactor: configuration (pdns).
* refactor: configuration (rackspace).
* refactor: configuration (rfc2136).
* refactor: configuration (route53).
* refactor: configuration (sakuracloud).
* refactor: configuration (vegadns).
* refactor: configuration (vultr).
2018-09-15 19:07:24 +02:00

240 lines
6.7 KiB
Go

// Package digitalocean implements a DNS provider for solving the DNS-01
// challenge using digitalocean DNS.
package digitalocean
import (
"bytes"
"encoding/json"
"errors"
"fmt"
"io"
"io/ioutil"
"net/http"
"sync"
"time"
"github.com/xenolf/lego/acme"
"github.com/xenolf/lego/platform/config/env"
)
// Config is used to configure the creation of the DNSProvider
type Config struct {
BaseURL string
AuthToken string
TTL int
PropagationTimeout time.Duration
PollingInterval time.Duration
HTTPClient *http.Client
}
// NewDefaultConfig returns a default configuration for the DNSProvider
func NewDefaultConfig() *Config {
return &Config{
BaseURL: defaultBaseURL,
TTL: env.GetOrDefaultInt("DO_TTL", 30),
PropagationTimeout: env.GetOrDefaultSecond("DO_PROPAGATION_TIMEOUT", 60*time.Second),
PollingInterval: env.GetOrDefaultSecond("DO_POLLING_INTERVAL", 5*time.Second),
HTTPClient: &http.Client{
Timeout: env.GetOrDefaultSecond("DO_HTTP_TIMEOUT", 30*time.Second),
},
}
}
// DNSProvider is an implementation of the acme.ChallengeProvider interface
// that uses DigitalOcean's REST API to manage TXT records for a domain.
type DNSProvider struct {
config *Config
recordIDs map[string]int
recordIDsMu sync.Mutex
}
// NewDNSProvider returns a DNSProvider instance configured for Digital
// Ocean. Credentials must be passed in the environment variable:
// DO_AUTH_TOKEN.
func NewDNSProvider() (*DNSProvider, error) {
values, err := env.Get("DO_AUTH_TOKEN")
if err != nil {
return nil, fmt.Errorf("digitalocean: %v", err)
}
config := NewDefaultConfig()
config.AuthToken = values["DO_AUTH_TOKEN"]
return NewDNSProviderConfig(config)
}
// NewDNSProviderCredentials uses the supplied credentials
// to return a DNSProvider instance configured for Digital Ocean.
// Deprecated
func NewDNSProviderCredentials(apiAuthToken string) (*DNSProvider, error) {
config := NewDefaultConfig()
config.AuthToken = apiAuthToken
return NewDNSProviderConfig(config)
}
// NewDNSProviderConfig return a DNSProvider instance configured for Digital Ocean.
func NewDNSProviderConfig(config *Config) (*DNSProvider, error) {
if config == nil {
return nil, errors.New("digitalocean: the configuration of the DNS provider is nil")
}
if config.AuthToken == "" {
return nil, fmt.Errorf("digitalocean: credentials missing")
}
if config.BaseURL == "" {
config.BaseURL = defaultBaseURL
}
return &DNSProvider{
config: config,
recordIDs: make(map[string]int),
}, nil
}
// Timeout returns the timeout and interval to use when checking for DNS propagation.
// Adjusting here to cope with spikes in propagation times.
func (d *DNSProvider) Timeout() (timeout, interval time.Duration) {
return d.config.PropagationTimeout, d.config.PollingInterval
}
// Present creates a TXT record using the specified parameters
func (d *DNSProvider) Present(domain, token, keyAuth string) error {
fqdn, value, _ := acme.DNS01Record(domain, keyAuth)
respData, err := d.addTxtRecord(domain, fqdn, value)
if err != nil {
return fmt.Errorf("digitalocean: %v", err)
}
d.recordIDsMu.Lock()
d.recordIDs[fqdn] = respData.DomainRecord.ID
d.recordIDsMu.Unlock()
return nil
}
// CleanUp removes the TXT record matching the specified parameters
func (d *DNSProvider) CleanUp(domain, token, keyAuth string) error {
fqdn, _, _ := acme.DNS01Record(domain, keyAuth)
// get the record's unique ID from when we created it
d.recordIDsMu.Lock()
recordID, ok := d.recordIDs[fqdn]
d.recordIDsMu.Unlock()
if !ok {
return fmt.Errorf("digitalocean: unknown record ID for '%s'", fqdn)
}
err := d.removeTxtRecord(domain, recordID)
if err != nil {
return fmt.Errorf("digitalocean: %v", err)
}
// Delete record ID from map
d.recordIDsMu.Lock()
delete(d.recordIDs, fqdn)
d.recordIDsMu.Unlock()
return nil
}
func (d *DNSProvider) removeTxtRecord(domain string, recordID int) error {
authZone, err := acme.FindZoneByFqdn(acme.ToFqdn(domain), acme.RecursiveNameservers)
if err != nil {
return fmt.Errorf("could not determine zone for domain: '%s'. %s", domain, err)
}
reqURL := fmt.Sprintf("%s/v2/domains/%s/records/%d", d.config.BaseURL, acme.UnFqdn(authZone), recordID)
req, err := d.newRequest(http.MethodDelete, reqURL, nil)
if err != nil {
return err
}
resp, err := d.config.HTTPClient.Do(req)
if err != nil {
return err
}
defer resp.Body.Close()
if resp.StatusCode >= 400 {
return readError(req, resp)
}
return nil
}
func (d *DNSProvider) addTxtRecord(domain, fqdn, value string) (*txtRecordResponse, error) {
authZone, err := acme.FindZoneByFqdn(acme.ToFqdn(domain), acme.RecursiveNameservers)
if err != nil {
return nil, fmt.Errorf("could not determine zone for domain: '%s'. %s", domain, err)
}
reqData := txtRecordRequest{RecordType: "TXT", Name: fqdn, Data: value, TTL: d.config.TTL}
body, err := json.Marshal(reqData)
if err != nil {
return nil, err
}
reqURL := fmt.Sprintf("%s/v2/domains/%s/records", d.config.BaseURL, acme.UnFqdn(authZone))
req, err := d.newRequest(http.MethodPost, reqURL, bytes.NewReader(body))
if err != nil {
return nil, err
}
resp, err := d.config.HTTPClient.Do(req)
if err != nil {
return nil, err
}
defer resp.Body.Close()
if resp.StatusCode >= 400 {
return nil, readError(req, resp)
}
content, err := ioutil.ReadAll(resp.Body)
if err != nil {
return nil, errors.New(toUnreadableBodyMessage(req, content))
}
// Everything looks good; but we'll need the ID later to delete the record
respData := &txtRecordResponse{}
err = json.Unmarshal(content, respData)
if err != nil {
return nil, fmt.Errorf("%v: %s", err, toUnreadableBodyMessage(req, content))
}
return respData, nil
}
func (d *DNSProvider) newRequest(method, reqURL string, body io.Reader) (*http.Request, error) {
req, err := http.NewRequest(method, reqURL, body)
if err != nil {
return nil, err
}
req.Header.Set("Content-Type", "application/json")
req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", d.config.AuthToken))
return req, nil
}
func readError(req *http.Request, resp *http.Response) error {
content, err := ioutil.ReadAll(resp.Body)
if err != nil {
return errors.New(toUnreadableBodyMessage(req, content))
}
var errInfo digitalOceanAPIError
err = json.Unmarshal(content, &errInfo)
if err != nil {
return fmt.Errorf("digitalOceanAPIError unmarshaling error: %v: %s", err, toUnreadableBodyMessage(req, content))
}
return fmt.Errorf("HTTP %d: %s: %s", resp.StatusCode, errInfo.ID, errInfo.Message)
}
func toUnreadableBodyMessage(req *http.Request, rawBody []byte) string {
return fmt.Sprintf("the request %s sent a response with a body which is an invalid format: %q", req.URL, string(rawBody))
}