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vinyldns.go
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vinyldns.go
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// Package vinyldns implements a DNS provider for solving the DNS-01 challenge using VinylDNS.
package vinyldns
import (
"errors"
"fmt"
"time"
"github.com/go-acme/lego/v4/challenge/dns01"
"github.com/go-acme/lego/v4/platform/config/env"
"github.com/vinyldns/go-vinyldns/vinyldns"
)
// Environment variables names.
const (
envNamespace = "VINYLDNS_"
EnvAccessKey = envNamespace + "ACCESS_KEY"
EnvSecretKey = envNamespace + "SECRET_KEY"
EnvHost = envNamespace + "HOST"
EnvTTL = envNamespace + "TTL"
EnvPropagationTimeout = envNamespace + "PROPAGATION_TIMEOUT"
EnvPollingInterval = envNamespace + "POLLING_INTERVAL"
)
// Config is used to configure the creation of the DNSProvider.
type Config struct {
AccessKey string
SecretKey string
Host string
TTL int
PropagationTimeout time.Duration
PollingInterval time.Duration
}
// NewDefaultConfig returns a default configuration for the DNSProvider.
func NewDefaultConfig() *Config {
return &Config{
TTL: env.GetOrDefaultInt(EnvTTL, 30),
PropagationTimeout: env.GetOrDefaultSecond(EnvPropagationTimeout, 2*time.Minute),
PollingInterval: env.GetOrDefaultSecond(EnvPollingInterval, 4*time.Second),
}
}
// DNSProvider implements the challenge.Provider interface.
type DNSProvider struct {
client *vinyldns.Client
config *Config
}
// NewDNSProvider returns a DNSProvider instance configured for VinylDNS.
// Credentials must be passed in the environment variables:
// VINYLDNS_ACCESS_KEY, VINYLDNS_SECRET_KEY, VINYLDNS_HOST.
func NewDNSProvider() (*DNSProvider, error) {
values, err := env.Get(EnvAccessKey, EnvSecretKey, EnvHost)
if err != nil {
return nil, fmt.Errorf("vinyldns: %w", err)
}
config := NewDefaultConfig()
config.AccessKey = values[EnvAccessKey]
config.SecretKey = values[EnvSecretKey]
config.Host = values[EnvHost]
return NewDNSProviderConfig(config)
}
// NewDNSProviderConfig return a DNSProvider instance configured for VinylDNS.
func NewDNSProviderConfig(config *Config) (*DNSProvider, error) {
if config == nil {
return nil, errors.New("vinyldns: the configuration of the VinylDNS DNS provider is nil")
}
if config.AccessKey == "" || config.SecretKey == "" {
return nil, errors.New("vinyldns: credentials are missing")
}
if config.Host == "" {
return nil, errors.New("vinyldns: host is missing")
}
client := vinyldns.NewClient(vinyldns.ClientConfiguration{
AccessKey: config.AccessKey,
SecretKey: config.SecretKey,
Host: config.Host,
UserAgent: "go-acme/lego",
})
client.HTTPClient.Timeout = 30 * time.Second
return &DNSProvider{client: client, config: config}, nil
}
// Present creates a TXT record to fulfill the dns-01 challenge.
func (d *DNSProvider) Present(domain, token, keyAuth string) error {
info := dns01.GetChallengeInfo(domain, keyAuth)
existingRecord, err := d.getRecordSet(info.EffectiveFQDN)
if err != nil {
return fmt.Errorf("vinyldns: %w", err)
}
record := vinyldns.Record{Text: info.Value}
if existingRecord == nil || existingRecord.ID == "" {
err = d.createRecordSet(info.EffectiveFQDN, []vinyldns.Record{record})
if err != nil {
return fmt.Errorf("vinyldns: %w", err)
}
return nil
}
for _, i := range existingRecord.Records {
if i.Text == info.Value {
return nil
}
}
records := existingRecord.Records
records = append(records, record)
err = d.updateRecordSet(existingRecord, records)
if err != nil {
return fmt.Errorf("vinyldns: %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)
existingRecord, err := d.getRecordSet(info.EffectiveFQDN)
if err != nil {
return fmt.Errorf("vinyldns: %w", err)
}
if existingRecord == nil || existingRecord.ID == "" || len(existingRecord.Records) == 0 {
return nil
}
var records []vinyldns.Record
for _, i := range existingRecord.Records {
if i.Text != info.Value {
records = append(records, i)
}
}
if len(records) == 0 {
err = d.deleteRecordSet(existingRecord)
if err != nil {
return fmt.Errorf("vinyldns: %w", err)
}
return nil
}
err = d.updateRecordSet(existingRecord, records)
if err != nil {
return fmt.Errorf("vinyldns: %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
}