forked from TrueCloudLab/lego
101 lines
3.2 KiB
Go
101 lines
3.2 KiB
Go
// Package duckdns implements a DNS provider for solving the DNS-01 challenge using DuckDNS.
|
|
// See http://www.duckdns.org/spec.jsp for more info on updating TXT records.
|
|
package duckdns
|
|
|
|
import (
|
|
"errors"
|
|
"fmt"
|
|
"net/http"
|
|
"time"
|
|
|
|
"github.com/go-acme/lego/v3/challenge/dns01"
|
|
"github.com/go-acme/lego/v3/platform/config/env"
|
|
)
|
|
|
|
// Environment variables names.
|
|
const (
|
|
envNamespace = "DUCKDNS_"
|
|
|
|
EnvToken = envNamespace + "TOKEN"
|
|
|
|
EnvPropagationTimeout = envNamespace + "PROPAGATION_TIMEOUT"
|
|
EnvPollingInterval = envNamespace + "POLLING_INTERVAL"
|
|
EnvHTTPTimeout = envNamespace + "HTTP_TIMEOUT"
|
|
EnvSequenceInterval = envNamespace + "SEQUENCE_INTERVAL"
|
|
)
|
|
|
|
// Config is used to configure the creation of the DNSProvider.
|
|
type Config struct {
|
|
Token string
|
|
PropagationTimeout time.Duration
|
|
PollingInterval time.Duration
|
|
SequenceInterval time.Duration
|
|
HTTPClient *http.Client
|
|
}
|
|
|
|
// NewDefaultConfig returns a default configuration for the DNSProvider.
|
|
func NewDefaultConfig() *Config {
|
|
return &Config{
|
|
PropagationTimeout: env.GetOrDefaultSecond(EnvPropagationTimeout, dns01.DefaultPropagationTimeout),
|
|
PollingInterval: env.GetOrDefaultSecond(EnvPollingInterval, dns01.DefaultPollingInterval),
|
|
SequenceInterval: env.GetOrDefaultSecond(EnvSequenceInterval, dns01.DefaultPropagationTimeout),
|
|
HTTPClient: &http.Client{
|
|
Timeout: env.GetOrDefaultSecond(EnvHTTPTimeout, 30*time.Second),
|
|
},
|
|
}
|
|
}
|
|
|
|
// DNSProvider implements the challenge.Provider interface.
|
|
type DNSProvider struct {
|
|
config *Config
|
|
}
|
|
|
|
// NewDNSProvider returns a new DNS provider using
|
|
// environment variable DUCKDNS_TOKEN for adding and removing the DNS record.
|
|
func NewDNSProvider() (*DNSProvider, error) {
|
|
values, err := env.Get(EnvToken)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("duckdns: %w", err)
|
|
}
|
|
|
|
config := NewDefaultConfig()
|
|
config.Token = values[EnvToken]
|
|
|
|
return NewDNSProviderConfig(config)
|
|
}
|
|
|
|
// NewDNSProviderConfig return a DNSProvider instance configured for DuckDNS.
|
|
func NewDNSProviderConfig(config *Config) (*DNSProvider, error) {
|
|
if config == nil {
|
|
return nil, errors.New("duckdns: the configuration of the DNS provider is nil")
|
|
}
|
|
|
|
if config.Token == "" {
|
|
return nil, errors.New("duckdns: credentials missing")
|
|
}
|
|
|
|
return &DNSProvider{config: config}, nil
|
|
}
|
|
|
|
// Present creates a TXT record to fulfill the dns-01 challenge.
|
|
func (d *DNSProvider) Present(domain, token, keyAuth string) error {
|
|
_, txtRecord := dns01.GetRecord(domain, keyAuth)
|
|
return d.updateTxtRecord(domain, d.config.Token, txtRecord, false)
|
|
}
|
|
|
|
// CleanUp clears DuckDNS TXT record.
|
|
func (d *DNSProvider) CleanUp(domain, token, keyAuth string) error {
|
|
return d.updateTxtRecord(domain, d.config.Token, "", true)
|
|
}
|
|
|
|
// 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
|
|
}
|
|
|
|
// Sequential All DNS challenges for this provider will be resolved sequentially.
|
|
// Returns the interval between each iteration.
|
|
func (d *DNSProvider) Sequential() time.Duration {
|
|
return d.config.SequenceInterval
|
|
}
|