mirror of
https://github.com/go-acme/lego.git
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154 lines
4.6 KiB
Go
154 lines
4.6 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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"context"
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"errors"
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"fmt"
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"net/http"
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"time"
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"github.com/go-acme/lego/v4/challenge/dns01"
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"github.com/go-acme/lego/v4/platform/config/env"
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"github.com/go-acme/lego/v4/providers/dns/dyn/internal"
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)
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// Environment variables names.
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const (
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envNamespace = "DYN_"
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EnvCustomerName = envNamespace + "CUSTOMER_NAME"
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EnvUserName = envNamespace + "USER_NAME"
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EnvPassword = envNamespace + "PASSWORD"
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EnvTTL = envNamespace + "TTL"
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EnvPropagationTimeout = envNamespace + "PROPAGATION_TIMEOUT"
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EnvPollingInterval = envNamespace + "POLLING_INTERVAL"
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EnvHTTPTimeout = envNamespace + "HTTP_TIMEOUT"
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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(EnvTTL, dns01.DefaultTTL),
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PropagationTimeout: env.GetOrDefaultSecond(EnvPropagationTimeout, dns01.DefaultPropagationTimeout),
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PollingInterval: env.GetOrDefaultSecond(EnvPollingInterval, dns01.DefaultPollingInterval),
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HTTPClient: &http.Client{
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Timeout: env.GetOrDefaultSecond(EnvHTTPTimeout, 10*time.Second),
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},
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}
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}
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// DNSProvider implements the challenge.Provider interface.
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type DNSProvider struct {
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config *Config
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client *internal.Client
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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(EnvCustomerName, EnvUserName, EnvPassword)
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if err != nil {
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return nil, fmt.Errorf("dyn: %w", err)
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}
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config := NewDefaultConfig()
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config.CustomerName = values[EnvCustomerName]
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config.UserName = values[EnvUserName]
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config.Password = values[EnvPassword]
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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, errors.New("dyn: credentials missing")
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}
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client := internal.NewClient(config.CustomerName, config.UserName, config.Password)
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if config.HTTPClient != nil {
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client.HTTPClient = config.HTTPClient
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}
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return &DNSProvider{config: config, client: client}, 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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info := dns01.GetChallengeInfo(domain, keyAuth)
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authZone, err := dns01.FindZoneByFqdn(info.EffectiveFQDN)
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if err != nil {
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return fmt.Errorf("dyn: could not find zone for domain %q: %w", domain, err)
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}
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ctx, err := d.client.CreateAuthenticatedContext(context.Background())
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if err != nil {
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return fmt.Errorf("dyn: %w", err)
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}
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err = d.client.AddTXTRecord(ctx, authZone, info.EffectiveFQDN, info.Value, d.config.TTL)
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if err != nil {
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return fmt.Errorf("dyn: %w", err)
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}
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err = d.client.Publish(ctx, 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: %w", err)
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}
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return d.client.Logout(ctx)
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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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info := dns01.GetChallengeInfo(domain, keyAuth)
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authZone, err := dns01.FindZoneByFqdn(info.EffectiveFQDN)
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if err != nil {
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return fmt.Errorf("dyn: could not find zone for domain %q: %w", domain, err)
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}
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ctx, err := d.client.CreateAuthenticatedContext(context.Background())
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if err != nil {
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return fmt.Errorf("dyn: %w", err)
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}
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err = d.client.RemoveTXTRecord(ctx, authZone, info.EffectiveFQDN)
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if err != nil {
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return fmt.Errorf("dyn: %w", err)
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}
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err = d.client.Publish(ctx, 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: %w", err)
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}
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return d.client.Logout(ctx)
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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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