mirror of
https://github.com/go-acme/lego.git
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158 lines
4.4 KiB
Go
158 lines
4.4 KiB
Go
// Package dyn implements a DNS provider for solving the DNS-01 challenge using Dyn Managed DNS.
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package dyn
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import (
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"errors"
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"fmt"
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"net/http"
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"strconv"
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"time"
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"github.com/go-acme/lego/challenge/dns01"
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"github.com/go-acme/lego/platform/config/env"
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)
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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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CustomerName string
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UserName string
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Password string
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HTTPClient *http.Client
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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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TTL: env.GetOrDefaultInt("DYN_TTL", dns01.DefaultTTL),
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PropagationTimeout: env.GetOrDefaultSecond("DYN_PROPAGATION_TIMEOUT", dns01.DefaultPropagationTimeout),
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PollingInterval: env.GetOrDefaultSecond("DYN_POLLING_INTERVAL", dns01.DefaultPollingInterval),
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HTTPClient: &http.Client{
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Timeout: env.GetOrDefaultSecond("DYN_HTTP_TIMEOUT", 10*time.Second),
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},
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}
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}
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// DNSProvider is an implementation of the acme.ChallengeProvider interface that uses
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// Dyn's Managed DNS API to manage TXT records for a domain.
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type DNSProvider struct {
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config *Config
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token string
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}
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// NewDNSProvider returns a DNSProvider instance configured for Dyn DNS.
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// Credentials must be passed in the environment variables:
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// DYN_CUSTOMER_NAME, DYN_USER_NAME and DYN_PASSWORD.
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func NewDNSProvider() (*DNSProvider, error) {
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values, err := env.Get("DYN_CUSTOMER_NAME", "DYN_USER_NAME", "DYN_PASSWORD")
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if err != nil {
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return nil, fmt.Errorf("dyn: %v", err)
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}
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config := NewDefaultConfig()
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config.CustomerName = values["DYN_CUSTOMER_NAME"]
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config.UserName = values["DYN_USER_NAME"]
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config.Password = values["DYN_PASSWORD"]
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return NewDNSProviderConfig(config)
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}
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// NewDNSProviderConfig return a DNSProvider instance configured for Dyn DNS
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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("dyn: the configuration of the DNS provider is nil")
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}
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if config.CustomerName == "" || config.UserName == "" || config.Password == "" {
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return nil, fmt.Errorf("dyn: credentials 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 using the specified parameters
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func (d *DNSProvider) Present(domain, token, keyAuth string) error {
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fqdn, value := dns01.GetRecord(domain, keyAuth)
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authZone, err := dns01.FindZoneByFqdn(fqdn)
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if err != nil {
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return fmt.Errorf("dyn: %v", err)
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}
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err = d.login()
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if err != nil {
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return fmt.Errorf("dyn: %v", err)
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}
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data := map[string]interface{}{
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"rdata": map[string]string{
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"txtdata": value,
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},
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"ttl": strconv.Itoa(d.config.TTL),
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}
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resource := fmt.Sprintf("TXTRecord/%s/%s/", authZone, fqdn)
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_, err = d.sendRequest(http.MethodPost, resource, data)
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if err != nil {
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return fmt.Errorf("dyn: %v", err)
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}
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err = d.publish(authZone, "Added TXT record for ACME dns-01 challenge using lego client")
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if err != nil {
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return fmt.Errorf("dyn: %v", err)
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}
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return d.logout()
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}
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// CleanUp removes the TXT record matching the specified parameters
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func (d *DNSProvider) CleanUp(domain, token, keyAuth string) error {
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fqdn, _ := dns01.GetRecord(domain, keyAuth)
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authZone, err := dns01.FindZoneByFqdn(fqdn)
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if err != nil {
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return fmt.Errorf("dyn: %v", err)
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}
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err = d.login()
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if err != nil {
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return fmt.Errorf("dyn: %v", err)
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}
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resource := fmt.Sprintf("TXTRecord/%s/%s/", authZone, fqdn)
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url := fmt.Sprintf("%s/%s", defaultBaseURL, resource)
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req, err := http.NewRequest(http.MethodDelete, url, nil)
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if err != nil {
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return fmt.Errorf("dyn: %v", err)
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}
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req.Header.Set("Content-Type", "application/json")
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req.Header.Set("Auth-Token", d.token)
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resp, err := d.config.HTTPClient.Do(req)
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if err != nil {
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return fmt.Errorf("dyn: %v", err)
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}
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resp.Body.Close()
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if resp.StatusCode != http.StatusOK {
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return fmt.Errorf("dyn: API request failed to delete TXT record HTTP status code %d", resp.StatusCode)
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}
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err = d.publish(authZone, "Removed TXT record for ACME dns-01 challenge using lego client")
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if err != nil {
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return fmt.Errorf("dyn: %v", err)
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}
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return d.logout()
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}
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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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