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// Package nifcloud implements a DNS provider for solving the DNS-01 challenge using NIFCLOUD DNS.
package nifcloud
import (
"errors"
"fmt"
"net/http"
"time"
"github.com/go-acme/lego/v4/challenge/dns01"
"github.com/go-acme/lego/v4/platform/config/env"
"github.com/go-acme/lego/v4/platform/wait"
"github.com/go-acme/lego/v4/providers/dns/nifcloud/internal"
)
// Environment variables names.
const (
envNamespace = "NIFCLOUD_"
EnvAccessKeyID = envNamespace + "ACCESS_KEY_ID"
EnvSecretAccessKey = envNamespace + "SECRET_ACCESS_KEY"
EnvDNSEndpoint = envNamespace + "DNS_ENDPOINT"
EnvTTL = envNamespace + "TTL"
EnvPropagationTimeout = envNamespace + "PROPAGATION_TIMEOUT"
EnvPollingInterval = envNamespace + "POLLING_INTERVAL"
EnvHTTPTimeout = envNamespace + "HTTP_TIMEOUT"
)
// Config is used to configure the creation of the DNSProvider.
type Config struct {
BaseURL string
AccessKey string
SecretKey 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 {
client *internal.Client
config *Config
}
// NewDNSProvider returns a DNSProvider instance configured for the NIFCLOUD DNS service.
// Credentials must be passed in the environment variables:
// NIFCLOUD_ACCESS_KEY_ID and NIFCLOUD_SECRET_ACCESS_KEY.
func NewDNSProvider() (*DNSProvider, error) {
values, err := env.Get(EnvAccessKeyID, EnvSecretAccessKey)
if err != nil {
return nil, fmt.Errorf("nifcloud: %w", err)
}
config := NewDefaultConfig()
config.BaseURL = env.GetOrFile(EnvDNSEndpoint)
config.AccessKey = values[EnvAccessKeyID]
config.SecretKey = values[EnvSecretAccessKey]
return NewDNSProviderConfig(config)
}
// NewDNSProviderConfig return a DNSProvider instance configured for NIFCLOUD.
func NewDNSProviderConfig(config *Config) (*DNSProvider, error) {
if config == nil {
return nil, errors.New("nifcloud: the configuration of the DNS provider is nil")
}
client, err := internal.NewClient(config.AccessKey, config.SecretKey)
if err != nil {
return nil, fmt.Errorf("nifcloud: %w", err)
}
if config.HTTPClient != nil {
client.HTTPClient = config.HTTPClient
}
if len(config.BaseURL) > 0 {
client.BaseURL = config.BaseURL
}
return &DNSProvider{client: client, config: config}, nil
}
// Present creates a TXT record using the specified parameters.
func (d *DNSProvider) Present(domain, token, keyAuth string) error {
fqdn, value := dns01.GetRecord(domain, keyAuth)
err := d.changeRecord("CREATE", fqdn, value, d.config.TTL)
if err != nil {
return fmt.Errorf("nifcloud: %w", err)
}
return err
}
// CleanUp removes the TXT record matching the specified parameters.
func (d *DNSProvider) CleanUp(domain, token, keyAuth string) error {
fqdn, value := dns01.GetRecord(domain, keyAuth)
err := d.changeRecord("DELETE", fqdn, value, d.config.TTL)
if err != nil {
return fmt.Errorf("nifcloud: %w", err)
}
return err
}
// 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
}
func (d *DNSProvider) changeRecord(action, fqdn, value string, ttl int) error {
name := dns01.UnFqdn(fqdn)
reqParams := internal.ChangeResourceRecordSetsRequest{
XMLNs: internal.XMLNs,
ChangeBatch: internal.ChangeBatch{
Comment: "Managed by Lego",
Changes: internal.Changes{
Change: []internal.Change{
{
Action: action,
ResourceRecordSet: internal.ResourceRecordSet{
Name: name,
Type: "TXT",
TTL: ttl,
ResourceRecords: internal.ResourceRecords{
ResourceRecord: []internal.ResourceRecord{
{
Value: value,
},
},
},
},
},
},
},
},
}
authZone, err := dns01.FindZoneByFqdn(fqdn)
if err != nil {
return fmt.Errorf("failed to find zone: %w", err)
}
resp, err := d.client.ChangeResourceRecordSets(dns01.UnFqdn(authZone), reqParams)
if err != nil {
return fmt.Errorf("failed to change record set: %w", err)
}
statusID := resp.ChangeInfo.ID
return wait.For("nifcloud", 120*time.Second, 4*time.Second, func() (bool, error) {
resp, err := d.client.GetChange(statusID)
if err != nil {
return false, fmt.Errorf("failed to query change status: %w", err)
}
return resp.ChangeInfo.Status == "INSYNC", nil
})
}
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