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// Package conoha implements a DNS provider for solving the DNS-01 challenge using ConoHa DNS.
package conoha
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/providers/dns/conoha/internal"
)
// Environment variables names.
const (
envNamespace = "CONOHA_"
EnvRegion = envNamespace + "REGION"
EnvTenantID = envNamespace + "TENANT_ID"
EnvAPIUsername = envNamespace + "API_USERNAME"
EnvAPIPassword = envNamespace + "API_PASSWORD"
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 {
Region string
TenantID string
Username string
Password string
TTL int
PropagationTimeout time.Duration
PollingInterval time.Duration
HTTPClient *http.Client
}
// NewDefaultConfig returns a default configuration for the DNSProvider.
func NewDefaultConfig() *Config {
return &Config{
Region: env.GetOrDefaultString(EnvRegion, "tyo1"),
TTL: env.GetOrDefaultInt(EnvTTL, 60),
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 ConoHa DNS.
// Credentials must be passed in the environment variables:
// CONOHA_TENANT_ID, CONOHA_API_USERNAME, CONOHA_API_PASSWORD.
func NewDNSProvider() (*DNSProvider, error) {
values, err := env.Get(EnvTenantID, EnvAPIUsername, EnvAPIPassword)
if err != nil {
return nil, fmt.Errorf("conoha: %w", err)
}
config := NewDefaultConfig()
config.TenantID = values[EnvTenantID]
config.Username = values[EnvAPIUsername]
config.Password = values[EnvAPIPassword]
return NewDNSProviderConfig(config)
}
// NewDNSProviderConfig return a DNSProvider instance configured for ConoHa DNS.
func NewDNSProviderConfig(config *Config) (*DNSProvider, error) {
if config == nil {
return nil, errors.New("conoha: the configuration of the DNS provider is nil")
}
if config.TenantID == "" || config.Username == "" || config.Password == "" {
return nil, errors.New("conoha: some credentials information are missing")
}
auth := internal.Auth{
TenantID: config.TenantID,
PasswordCredentials: internal.PasswordCredentials{
Username: config.Username,
Password: config.Password,
},
}
client, err := internal.NewClient(config.Region, auth, config.HTTPClient)
if err != nil {
return nil, fmt.Errorf("conoha: failed to create client: %w", err)
}
return &DNSProvider{config: config, client: client}, nil
}
// Present creates a TXT record to fulfill the dns-01 challenge.
func (d *DNSProvider) Present(domain, token, keyAuth string) error {
fqdn, value := dns01.GetRecord(domain, keyAuth)
authZone, err := dns01.FindZoneByFqdn(fqdn)
if err != nil {
return err
}
id, err := d.client.GetDomainID(authZone)
if err != nil {
return fmt.Errorf("conoha: failed to get domain ID: %w", err)
}
record := internal.Record{
Name: fqdn,
Type: "TXT",
Data: value,
TTL: d.config.TTL,
}
err = d.client.CreateRecord(id, record)
if err != nil {
return fmt.Errorf("conoha: failed to create record: %w", err)
}
return nil
}
// CleanUp clears ConoHa DNS TXT record.
func (d *DNSProvider) CleanUp(domain, token, keyAuth string) error {
fqdn, value := dns01.GetRecord(domain, keyAuth)
authZone, err := dns01.FindZoneByFqdn(fqdn)
if err != nil {
return err
}
domID, err := d.client.GetDomainID(authZone)
if err != nil {
return fmt.Errorf("conoha: failed to get domain ID: %w", err)
}
recID, err := d.client.GetRecordID(domID, fqdn, "TXT", value)
if err != nil {
return fmt.Errorf("conoha: failed to get record ID: %w", err)
}
err = d.client.DeleteRecord(domID, recID)
if err != nil {
return fmt.Errorf("conoha: failed to 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
}
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