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ultradns.go
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ultradns.go
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// Package ultradns implements a DNS provider for solving the DNS-01 challenge using ultradns.
package ultradns
import (
"errors"
"fmt"
"time"
"github.com/go-acme/lego/v4/challenge/dns01"
"github.com/go-acme/lego/v4/platform/config/env"
"github.com/ultradns/ultradns-go-sdk/pkg/client"
"github.com/ultradns/ultradns-go-sdk/pkg/record"
"github.com/ultradns/ultradns-go-sdk/pkg/rrset"
)
// Environment variables names.
const (
envNamespace = "ULTRADNS_"
EnvUsername = envNamespace + "USERNAME"
EnvPassword = envNamespace + "PASSWORD"
EnvEndpoint = envNamespace + "ENDPOINT"
EnvTTL = envNamespace + "TTL"
EnvPropagationTimeout = envNamespace + "PROPAGATION_TIMEOUT"
EnvPollingInterval = envNamespace + "POLLING_INTERVAL"
// Default variables names.
defaultEndpoint = "https://api.ultradns.com/"
defaultUserAgent = "lego-provider-ultradns"
)
// DNSProvider implements the challenge.Provider interface.
type DNSProvider struct {
config *Config
client *client.Client
}
// Config is used to configure the creation of the DNSProvider.
type Config struct {
Username string
Password string
Endpoint string
TTL int
PropagationTimeout time.Duration
PollingInterval time.Duration
}
// NewDefaultConfig returns a default configuration for the DNSProvider.
func NewDefaultConfig() *Config {
return &Config{
Endpoint: env.GetOrDefaultString(EnvEndpoint, defaultEndpoint),
TTL: env.GetOrDefaultInt(EnvTTL, 120),
PropagationTimeout: env.GetOrDefaultSecond(EnvPropagationTimeout, 2*time.Minute),
PollingInterval: env.GetOrDefaultSecond(EnvPollingInterval, 4*time.Second),
}
}
// NewDNSProvider returns a DNSProvider instance configured for ultradns.
// Credentials must be passed in the environment variables:
// ULTRADNS_USERNAME and ULTRADNS_PASSWORD.
func NewDNSProvider() (*DNSProvider, error) {
values, err := env.Get(EnvUsername, EnvPassword)
if err != nil {
return nil, fmt.Errorf("ultradns: %w", err)
}
config := NewDefaultConfig()
config.Username = values[EnvUsername]
config.Password = values[EnvPassword]
return NewDNSProviderConfig(config)
}
// NewDNSProviderConfig return a DNSProvider instance configured for ultradns.
func NewDNSProviderConfig(config *Config) (*DNSProvider, error) {
if config == nil {
return nil, errors.New("ultradns: the configuration of the DNS provider is nil")
}
ultraConfig := client.Config{
Username: config.Username,
Password: config.Password,
HostURL: config.Endpoint,
UserAgent: defaultUserAgent,
}
uClient, err := client.NewClient(ultraConfig)
if err != nil {
return nil, fmt.Errorf("ultradns: %w", err)
}
return &DNSProvider{config: config, client: uClient}, nil
}
// Timeout returns the timeout and interval to use when checking for DNS propagation.
func (d *DNSProvider) Timeout() (timeout, interval time.Duration) {
return d.config.PropagationTimeout, d.config.PollingInterval
}
// Present creates a TXT record using the specified parameters.
func (d *DNSProvider) Present(domain, token, keyAuth string) error {
info := dns01.GetChallengeInfo(domain, keyAuth)
authZone, err := dns01.FindZoneByFqdn(info.EffectiveFQDN)
if err != nil {
return fmt.Errorf("ultradns: could not find zone for domain %q (%s): %w", domain, info.EffectiveFQDN, err)
}
recordService, err := record.Get(d.client)
if err != nil {
return fmt.Errorf("ultradns: %w", err)
}
rrSetKeyData := &rrset.RRSetKey{
Owner: info.EffectiveFQDN,
Zone: authZone,
RecordType: "TXT",
}
res, _, _ := recordService.Read(rrSetKeyData)
rrSetData := &rrset.RRSet{
OwnerName: info.EffectiveFQDN,
TTL: d.config.TTL,
RRType: "TXT",
RData: []string{info.Value},
}
if res != nil && res.StatusCode == 200 {
_, err = recordService.Update(rrSetKeyData, rrSetData)
} else {
_, err = recordService.Create(rrSetKeyData, rrSetData)
}
if err != nil {
return fmt.Errorf("ultradns: %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)
authZone, err := dns01.FindZoneByFqdn(info.EffectiveFQDN)
if err != nil {
return fmt.Errorf("ultradns: could not find zone for domain %q (%s): %w", domain, info.EffectiveFQDN, err)
}
recordService, err := record.Get(d.client)
if err != nil {
return fmt.Errorf("ultradns: %w", err)
}
rrSetKeyData := &rrset.RRSetKey{
Owner: info.EffectiveFQDN,
Zone: authZone,
RecordType: "TXT",
}
_, err = recordService.Delete(rrSetKeyData)
if err != nil {
return fmt.Errorf("ultradns: %w", err)
}
return nil
}