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lego/providers/dns/yandex360/yandex360.go

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// Package yandex360 implements a DNS provider for solving the DNS-01 challenge using Yandex 360.
package yandex360
import (
"context"
"errors"
"fmt"
"net/http"
"strconv"
"sync"
"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/yandex360/internal"
)
// Environment variables names.
const (
envNamespace = "YANDEX360_"
EnvOAuthToken = envNamespace + "OAUTH_TOKEN"
EnvOrgID = envNamespace + "ORG_ID"
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 {
OAuthToken string
OrgID int64
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, 21600),
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
recordIDs map[string]int64
recordIDsMu sync.Mutex
}
// NewDNSProvider returns a DNSProvider instance configured for Yandex 360.
func NewDNSProvider() (*DNSProvider, error) {
values, err := env.Get(EnvOAuthToken, EnvOrgID)
if err != nil {
return nil, fmt.Errorf("yandex360: %w", err)
}
config := NewDefaultConfig()
config.OAuthToken = values[EnvOAuthToken]
orgID, err := strconv.ParseInt(values[EnvOrgID], 10, 64)
if err != nil {
return nil, fmt.Errorf("yandex360: %w", err)
}
config.OrgID = orgID
return NewDNSProviderConfig(config)
}
// NewDNSProviderConfig return a DNSProvider instance configured for Yandex 360.
func NewDNSProviderConfig(config *Config) (*DNSProvider, error) {
if config == nil {
return nil, errors.New("yandex360: the configuration of the DNS provider is nil")
}
client, err := internal.NewClient(config.OAuthToken, config.OrgID)
if err != nil {
return nil, fmt.Errorf("yandex360: %w", err)
}
if config.HTTPClient != nil {
client.HTTPClient = config.HTTPClient
}
return &DNSProvider{
client: client,
config: config,
recordIDs: make(map[string]int64),
}, 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)
authZone, err := dns01.FindZoneByFqdn(dns01.ToFqdn(info.EffectiveFQDN))
if err != nil {
return fmt.Errorf("yandex360: could not find zone for domain %q (%s): %w", domain, info.EffectiveFQDN, err)
}
subDomain, err := dns01.ExtractSubDomain(info.EffectiveFQDN, authZone)
if err != nil {
return fmt.Errorf("yandex360: %w", err)
}
authZone = dns01.UnFqdn(authZone)
record := internal.Record{
Name: subDomain,
TTL: d.config.TTL,
Text: info.Value,
Type: "TXT",
}
newRecord, err := d.client.AddRecord(context.Background(), authZone, record)
if err != nil {
return fmt.Errorf("yandex360: add DNS record: %w", err)
}
d.recordIDsMu.Lock()
d.recordIDs[token] = newRecord.ID
d.recordIDsMu.Unlock()
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(dns01.ToFqdn(info.EffectiveFQDN))
if err != nil {
return fmt.Errorf("yandex360: could not find zone for domain %q (%s): %w", domain, info.EffectiveFQDN, err)
}
authZone = dns01.UnFqdn(authZone)
d.recordIDsMu.Lock()
recordID, ok := d.recordIDs[token]
d.recordIDsMu.Unlock()
if !ok {
return fmt.Errorf("yandex360: unknown recordID for %q", info.EffectiveFQDN)
}
err = d.client.DeleteRecord(context.Background(), authZone, recordID)
if err != nil {
return fmt.Errorf("yandex360: delete DNS record: %w", err)
}
d.recordIDsMu.Lock()
delete(d.recordIDs, token)
d.recordIDsMu.Unlock()
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
}