/
vegadns.go
126 lines (103 loc) · 3.68 KB
/
vegadns.go
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// Package vegadns implements a DNS provider for solving the DNS-01 challenge using VegaDNS.
package vegadns
import (
"errors"
"fmt"
"strings"
"time"
vegaClient "github.com/OpenDNS/vegadns2client"
"github.com/go-acme/lego/v4/challenge/dns01"
"github.com/go-acme/lego/v4/platform/config/env"
)
// Environment variables names.
const (
envNamespace = "VEGADNS_"
EnvKey = "SECRET_VEGADNS_KEY"
EnvSecret = "SECRET_VEGADNS_SECRET"
EnvURL = envNamespace + "URL"
EnvTTL = envNamespace + "TTL"
EnvPropagationTimeout = envNamespace + "PROPAGATION_TIMEOUT"
EnvPollingInterval = envNamespace + "POLLING_INTERVAL"
)
// Config is used to configure the creation of the DNSProvider.
type Config struct {
BaseURL string
APIKey string
APISecret string
PropagationTimeout time.Duration
PollingInterval time.Duration
TTL int
}
// NewDefaultConfig returns a default configuration for the DNSProvider.
func NewDefaultConfig() *Config {
return &Config{
TTL: env.GetOrDefaultInt(EnvTTL, 10),
PropagationTimeout: env.GetOrDefaultSecond(EnvPropagationTimeout, 12*time.Minute),
PollingInterval: env.GetOrDefaultSecond(EnvPollingInterval, 1*time.Minute),
}
}
// DNSProvider implements the challenge.Provider interface.
type DNSProvider struct {
config *Config
client vegaClient.VegaDNSClient
}
// NewDNSProvider returns a DNSProvider instance configured for VegaDNS.
// Credentials must be passed in the environment variables:
// VEGADNS_URL, SECRET_VEGADNS_KEY, SECRET_VEGADNS_SECRET.
func NewDNSProvider() (*DNSProvider, error) {
values, err := env.Get(EnvURL)
if err != nil {
return nil, fmt.Errorf("vegadns: %w", err)
}
config := NewDefaultConfig()
config.BaseURL = values[EnvURL]
config.APIKey = env.GetOrFile(EnvKey)
config.APISecret = env.GetOrFile(EnvSecret)
return NewDNSProviderConfig(config)
}
// NewDNSProviderConfig return a DNSProvider instance configured for VegaDNS.
func NewDNSProviderConfig(config *Config) (*DNSProvider, error) {
if config == nil {
return nil, errors.New("vegadns: the configuration of the DNS provider is nil")
}
vega := vegaClient.NewVegaDNSClient(config.BaseURL)
vega.APIKey = config.APIKey
vega.APISecret = config.APISecret
return &DNSProvider{client: vega, config: config}, 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 to fulfill the dns-01 challenge.
func (d *DNSProvider) Present(domain, token, keyAuth string) error {
fqdn, value := dns01.GetRecord(domain, keyAuth)
_, domainID, err := d.client.GetAuthZone(fqdn)
if err != nil {
return fmt.Errorf("vegadns: can't find Authoritative Zone for %s in Present: %w", fqdn, err)
}
err = d.client.CreateTXT(domainID, fqdn, value, d.config.TTL)
if err != nil {
return fmt.Errorf("vegadns: %w", err)
}
return nil
}
// CleanUp removes the TXT record matching the specified parameters.
func (d *DNSProvider) CleanUp(domain, token, keyAuth string) error {
fqdn, _ := dns01.GetRecord(domain, keyAuth)
_, domainID, err := d.client.GetAuthZone(fqdn)
if err != nil {
return fmt.Errorf("vegadns: can't find Authoritative Zone for %s in CleanUp: %w", fqdn, err)
}
txt := strings.TrimSuffix(fqdn, ".")
recordID, err := d.client.GetRecordID(domainID, txt, "TXT")
if err != nil {
return fmt.Errorf("vegadns: couldn't get Record ID in CleanUp: %w", err)
}
err = d.client.DeleteRecord(recordID)
if err != nil {
return fmt.Errorf("vegadns: %w", err)
}
return nil
}