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lego/providers/dns/technitium/technitium.go
2024-11-15 23:21:21 +01:00

137 lines
3.7 KiB
Go

// Package technitium implements a DNS provider for solving the DNS-01 challenge using Technitium.
package technitium
import (
"context"
"errors"
"fmt"
"net/http"
"time"
"github.com/go-acme/lego/v4/challenge"
"github.com/go-acme/lego/v4/challenge/dns01"
"github.com/go-acme/lego/v4/platform/config/env"
"github.com/go-acme/lego/v4/providers/dns/technitium/internal"
)
// Environment variables names.
const (
envNamespace = "TECHNITIUM_"
EnvServerBaseURL = envNamespace + "SERVER_BASE_URL"
EnvAPIToken = envNamespace + "API_TOKEN"
EnvTTL = envNamespace + "TTL"
EnvPropagationTimeout = envNamespace + "PROPAGATION_TIMEOUT"
EnvPollingInterval = envNamespace + "POLLING_INTERVAL"
EnvHTTPTimeout = envNamespace + "HTTP_TIMEOUT"
)
var _ challenge.ProviderTimeout = (*DNSProvider)(nil)
// Config is used to configure the creation of the DNSProvider.
type Config struct {
BaseURL string
APIToken string
PropagationTimeout time.Duration
PollingInterval time.Duration
TTL int
HTTPClient *http.Client
}
// NewDefaultConfig returns a default configuration for the DNSProvider.
func NewDefaultConfig() *Config {
return &Config{
TTL: env.GetOrDefaultInt(EnvTTL, dns01.DefaultTTL),
PropagationTimeout: env.GetOrDefaultSecond(EnvPropagationTimeout, dns01.DefaultPropagationTimeout),
PollingInterval: env.GetOrDefaultSecond(EnvPollingInterval, dns01.DefaultPollingInterval),
HTTPClient: &http.Client{
Timeout: env.GetOrDefaultSecond(EnvHTTPTimeout, 30*time.Second),
},
}
}
// DNSProvider implements the challenge.Provider interface.
type DNSProvider struct {
config *Config
client *internal.Client
}
// NewDNSProvider returns a DNSProvider instance configured for Technitium.
func NewDNSProvider() (*DNSProvider, error) {
values, err := env.Get(EnvServerBaseURL, EnvAPIToken)
if err != nil {
return nil, fmt.Errorf("technitium: %w", err)
}
config := NewDefaultConfig()
config.BaseURL = values[EnvServerBaseURL]
config.APIToken = values[EnvAPIToken]
return NewDNSProviderConfig(config)
}
// NewDNSProviderConfig return a DNSProvider instance configured for Technitium.
func NewDNSProviderConfig(config *Config) (*DNSProvider, error) {
if config == nil {
return nil, errors.New("technitium: the configuration of the DNS provider is nil")
}
client, err := internal.NewClient(config.BaseURL, config.APIToken)
if err != nil {
return nil, fmt.Errorf("technitium: %w", err)
}
if config.HTTPClient != nil {
client.HTTPClient = config.HTTPClient
}
return &DNSProvider{
config: config,
client: client,
}, nil
}
// Present creates a TXT record using the specified parameters.
func (d *DNSProvider) Present(domain, token, keyAuth string) error {
info := dns01.GetChallengeInfo(domain, keyAuth)
record := internal.Record{
Domain: info.EffectiveFQDN,
Type: "TXT",
Text: info.Value,
}
_, err := d.client.AddRecord(context.Background(), record)
if err != nil {
return fmt.Errorf("technitium: add record: %w", err)
}
return nil
}
// CleanUp removes the TXT record matching the specified parameters.
func (d *DNSProvider) CleanUp(domain, token, keyAuth string) error {
info := dns01.GetChallengeInfo(domain, keyAuth)
record := internal.Record{
Domain: info.EffectiveFQDN,
Type: "TXT",
Text: info.Value,
}
err := d.client.DeleteRecord(context.Background(), record)
if err != nil {
return fmt.Errorf("technitium: delete record: %w", err)
}
return 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
}