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lego/providers/dns/transip/transip.go
2020-02-27 19:14:45 +01:00

161 lines
4.6 KiB
Go

// Package transip implements a DNS provider for solving the DNS-01 challenge using TransIP.
package transip
import (
"errors"
"fmt"
"strings"
"sync"
"time"
"github.com/go-acme/lego/v3/challenge/dns01"
"github.com/go-acme/lego/v3/platform/config/env"
"github.com/transip/gotransip"
transipdomain "github.com/transip/gotransip/domain"
)
// Config is used to configure the creation of the DNSProvider
type Config struct {
AccountName string
PrivateKeyPath string
PropagationTimeout time.Duration
PollingInterval time.Duration
TTL int64
}
// NewDefaultConfig returns a default configuration for the DNSProvider
func NewDefaultConfig() *Config {
return &Config{
TTL: int64(env.GetOrDefaultInt("TRANSIP_TTL", 10)),
PropagationTimeout: env.GetOrDefaultSecond("TRANSIP_PROPAGATION_TIMEOUT", 10*time.Minute),
PollingInterval: env.GetOrDefaultSecond("TRANSIP_POLLING_INTERVAL", 10*time.Second),
}
}
// DNSProvider describes a provider for TransIP
type DNSProvider struct {
config *Config
client gotransip.Client
dnsEntriesMu sync.Mutex
}
// NewDNSProvider returns a DNSProvider instance configured for TransIP.
// Credentials must be passed in the environment variables:
// TRANSIP_ACCOUNTNAME, TRANSIP_PRIVATEKEYPATH.
func NewDNSProvider() (*DNSProvider, error) {
values, err := env.Get("TRANSIP_ACCOUNT_NAME", "TRANSIP_PRIVATE_KEY_PATH")
if err != nil {
return nil, fmt.Errorf("transip: %w", err)
}
config := NewDefaultConfig()
config.AccountName = values["TRANSIP_ACCOUNT_NAME"]
config.PrivateKeyPath = values["TRANSIP_PRIVATE_KEY_PATH"]
return NewDNSProviderConfig(config)
}
// NewDNSProviderConfig return a DNSProvider instance configured for TransIP.
func NewDNSProviderConfig(config *Config) (*DNSProvider, error) {
if config == nil {
return nil, errors.New("transip: the configuration of the DNS provider is nil")
}
client, err := gotransip.NewSOAPClient(gotransip.ClientConfig{
AccountName: config.AccountName,
PrivateKeyPath: config.PrivateKeyPath,
})
if err != nil {
return nil, fmt.Errorf("transip: %w", err)
}
return &DNSProvider{client: client, 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)
authZone, err := dns01.FindZoneByFqdn(fqdn)
if err != nil {
return err
}
domainName := dns01.UnFqdn(authZone)
// get the subDomain
subDomain := strings.TrimSuffix(dns01.UnFqdn(fqdn), "."+domainName)
// use mutex to prevent race condition from GetInfo until SetDNSEntries
d.dnsEntriesMu.Lock()
defer d.dnsEntriesMu.Unlock()
// get all DNS entries
info, err := transipdomain.GetInfo(d.client, domainName)
if err != nil {
return fmt.Errorf("transip: error for %s in Present: %w", domain, err)
}
// include the new DNS entry
dnsEntries := append(info.DNSEntries, transipdomain.DNSEntry{
Name: subDomain,
TTL: d.config.TTL,
Type: transipdomain.DNSEntryTypeTXT,
Content: value,
})
// set the updated DNS entries
err = transipdomain.SetDNSEntries(d.client, domainName, dnsEntries)
if err != nil {
return fmt.Errorf("transip: %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)
authZone, err := dns01.FindZoneByFqdn(fqdn)
if err != nil {
return err
}
domainName := dns01.UnFqdn(authZone)
// get the subDomain
subDomain := strings.TrimSuffix(dns01.UnFqdn(fqdn), "."+domainName)
// use mutex to prevent race condition from GetInfo until SetDNSEntries
d.dnsEntriesMu.Lock()
defer d.dnsEntriesMu.Unlock()
// get all DNS entries
info, err := transipdomain.GetInfo(d.client, domainName)
if err != nil {
return fmt.Errorf("transip: error for %s in CleanUp: %w", fqdn, err)
}
// loop through the existing entries and remove the specific record
updatedEntries := info.DNSEntries[:0]
for _, e := range info.DNSEntries {
if e.Name != subDomain {
updatedEntries = append(updatedEntries, e)
}
}
// set the updated DNS entries
err = transipdomain.SetDNSEntries(d.client, domainName, updatedEntries)
if err != nil {
return fmt.Errorf("transip: couldn't get Record ID in CleanUp: %w", err)
}
return nil
}