mirror of
https://github.com/go-acme/lego.git
synced 2024-12-23 09:15:11 +02:00
208 lines
5.4 KiB
Go
208 lines
5.4 KiB
Go
package shellrent
|
|
|
|
import (
|
|
"context"
|
|
"errors"
|
|
"fmt"
|
|
"net/http"
|
|
"strings"
|
|
"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/shellrent/internal"
|
|
)
|
|
|
|
// Environment variables names.
|
|
const (
|
|
envNamespace = "SHELLRENT_"
|
|
|
|
EnvUsername = envNamespace + "USERNAME"
|
|
EnvToken = envNamespace + "TOKEN"
|
|
|
|
EnvTTL = envNamespace + "TTL"
|
|
EnvPropagationTimeout = envNamespace + "PROPAGATION_TIMEOUT"
|
|
EnvPollingInterval = envNamespace + "POLLING_INTERVAL"
|
|
EnvHTTPTimeout = envNamespace + "HTTP_TIMEOUT"
|
|
)
|
|
|
|
const defaultTTL = 3600
|
|
|
|
type reqKey struct {
|
|
domainID int
|
|
recordID int
|
|
}
|
|
|
|
// Config is used to configure the creation of the DNSProvider.
|
|
type Config struct {
|
|
Username string
|
|
Token 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, defaultTTL),
|
|
PropagationTimeout: env.GetOrDefaultSecond(EnvPropagationTimeout, 5*time.Minute),
|
|
PollingInterval: env.GetOrDefaultSecond(EnvPollingInterval, 10*time.Second),
|
|
HTTPClient: &http.Client{
|
|
Timeout: env.GetOrDefaultSecond(EnvHTTPTimeout, 30*time.Second),
|
|
},
|
|
}
|
|
}
|
|
|
|
// DNSProvider implements the challenge.Provider interface.
|
|
type DNSProvider struct {
|
|
config *Config
|
|
client *internal.Client
|
|
|
|
recordIDs map[string]reqKey
|
|
recordIDsMu sync.Mutex
|
|
}
|
|
|
|
// NewDNSProvider returns a DNSProvider instance configured for Shellrent.
|
|
// Credentials must be passed in the environment variable: SHELLRENT_USERNAME, SHELLRENT_TOKEN.
|
|
func NewDNSProvider() (*DNSProvider, error) {
|
|
values, err := env.Get(EnvUsername, EnvToken)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("shellrent: %w", err)
|
|
}
|
|
|
|
config := NewDefaultConfig()
|
|
config.Username = values[EnvUsername]
|
|
config.Token = values[EnvToken]
|
|
|
|
return NewDNSProviderConfig(config)
|
|
}
|
|
|
|
// NewDNSProviderConfig return a DNSProvider instance configured for Shellrent.
|
|
func NewDNSProviderConfig(config *Config) (*DNSProvider, error) {
|
|
if config == nil {
|
|
return nil, errors.New("shellrent: the configuration of the DNS provider is nil")
|
|
}
|
|
|
|
if config.Username == "" {
|
|
return nil, errors.New("shellrent: missing credentials: username")
|
|
}
|
|
|
|
if config.Token == "" {
|
|
return nil, errors.New("shellrent: missing credentials: token")
|
|
}
|
|
|
|
client := internal.NewClient(config.Username, config.Token)
|
|
|
|
if config.HTTPClient != nil {
|
|
client.HTTPClient = config.HTTPClient
|
|
}
|
|
|
|
return &DNSProvider{
|
|
config: config,
|
|
client: client,
|
|
recordIDs: make(map[string]reqKey),
|
|
}, 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
|
|
}
|
|
|
|
// Present creates a TXT record using the specified parameters.
|
|
func (d *DNSProvider) Present(domain, token, keyAuth string) error {
|
|
ctx := context.Background()
|
|
info := dns01.GetChallengeInfo(domain, keyAuth)
|
|
|
|
zone, err := d.findZone(ctx, dns01.UnFqdn(info.EffectiveFQDN))
|
|
if err != nil {
|
|
if err != nil {
|
|
return fmt.Errorf("shellrent: could not find zone for domain %q: %w", domain, err)
|
|
}
|
|
}
|
|
|
|
subDomain, err := dns01.ExtractSubDomain(info.EffectiveFQDN, zone.DomainName)
|
|
if err != nil {
|
|
return fmt.Errorf("shellrent: %w", err)
|
|
}
|
|
|
|
record := internal.Record{
|
|
Type: "TXT",
|
|
Host: subDomain,
|
|
TTL: internal.TTLRounder(d.config.TTL),
|
|
Destination: info.Value,
|
|
}
|
|
|
|
recordID, err := d.client.CreateRecord(ctx, zone.ID, record)
|
|
if err != nil {
|
|
return fmt.Errorf("shellrent: create record: %w", err)
|
|
}
|
|
|
|
d.recordIDsMu.Lock()
|
|
d.recordIDs[token] = reqKey{domainID: zone.ID, recordID: recordID}
|
|
d.recordIDsMu.Unlock()
|
|
|
|
return nil
|
|
}
|
|
|
|
// CleanUp removes the TXT record matching the specified parameters.
|
|
func (d *DNSProvider) CleanUp(domain, token, keyAuth string) error {
|
|
ctx := context.Background()
|
|
info := dns01.GetChallengeInfo(domain, keyAuth)
|
|
|
|
// gets the record's unique ID from when we created it
|
|
d.recordIDsMu.Lock()
|
|
key, ok := d.recordIDs[token]
|
|
d.recordIDsMu.Unlock()
|
|
if !ok {
|
|
return fmt.Errorf("shellrent: unknown request key for '%s' '%s'", info.EffectiveFQDN, token)
|
|
}
|
|
|
|
err := d.client.DeleteRecord(ctx, key.domainID, key.recordID)
|
|
if err != nil {
|
|
return fmt.Errorf("shellrent: delete record: %w", err)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (d *DNSProvider) findZone(ctx context.Context, domain string) (*internal.DomainDetails, error) {
|
|
services, err := d.client.ListServices(ctx)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("list services: %w", err)
|
|
}
|
|
|
|
for _, service := range services {
|
|
details, err := d.client.GetServiceDetails(ctx, service)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("get service details: %w", err)
|
|
}
|
|
|
|
domainDetails, err := d.client.GetDomainDetails(ctx, details.DomainID)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("get domain details: %w", err)
|
|
}
|
|
|
|
domain := domain
|
|
|
|
for {
|
|
i := strings.Index(domain, ".")
|
|
if i == -1 {
|
|
break
|
|
}
|
|
|
|
if strings.EqualFold(domainDetails.DomainName, domain) {
|
|
return domainDetails, nil
|
|
}
|
|
|
|
domain = domain[i+1:]
|
|
}
|
|
}
|
|
|
|
return nil, errors.New("zone not found")
|
|
}
|