lego/providers/dns/cloudflare/cloudflare.go
2018-11-15 22:41:54 +01:00

175 lines
5.1 KiB
Go

// Package cloudflare implements a DNS provider for solving the DNS-01
// challenge using cloudflare DNS.
package cloudflare
import (
"errors"
"fmt"
"net/http"
"time"
"github.com/cloudflare/cloudflare-go"
"github.com/xenolf/lego/acme"
"github.com/xenolf/lego/log"
"github.com/xenolf/lego/platform/config/env"
)
// CloudFlareAPIURL represents the API endpoint to call.
const CloudFlareAPIURL = "https://api.cloudflare.com/client/v4" // Deprecated
const (
minTTL = 120
)
// Config is used to configure the creation of the DNSProvider
type Config struct {
AuthEmail string
AuthKey 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{
TTL: env.GetOrDefaultInt("CLOUDFLARE_TTL", minTTL),
PropagationTimeout: env.GetOrDefaultSecond("CLOUDFLARE_PROPAGATION_TIMEOUT", 2*time.Minute),
PollingInterval: env.GetOrDefaultSecond("CLOUDFLARE_POLLING_INTERVAL", 2*time.Second),
HTTPClient: &http.Client{
Timeout: env.GetOrDefaultSecond("CLOUDFLARE_HTTP_TIMEOUT", 30*time.Second),
},
}
}
// DNSProvider is an implementation of the acme.ChallengeProvider interface
type DNSProvider struct {
client *cloudflare.API
config *Config
}
// NewDNSProvider returns a DNSProvider instance configured for Cloudflare.
// Credentials must be passed in the environment variables:
// CLOUDFLARE_EMAIL and CLOUDFLARE_API_KEY.
func NewDNSProvider() (*DNSProvider, error) {
values, err := env.GetWithFallback(
[]string{"CLOUDFLARE_EMAIL", "CF_API_EMAIL"},
[]string{"CLOUDFLARE_API_KEY", "CF_API_KEY"})
if err != nil {
return nil, fmt.Errorf("cloudflare: %v", err)
}
config := NewDefaultConfig()
config.AuthEmail = values["CLOUDFLARE_EMAIL"]
config.AuthKey = values["CLOUDFLARE_API_KEY"]
return NewDNSProviderConfig(config)
}
// NewDNSProviderCredentials uses the supplied credentials
// to return a DNSProvider instance configured for Cloudflare.
// Deprecated
func NewDNSProviderCredentials(email, key string) (*DNSProvider, error) {
config := NewDefaultConfig()
config.AuthEmail = email
config.AuthKey = key
return NewDNSProviderConfig(config)
}
// NewDNSProviderConfig return a DNSProvider instance configured for Cloudflare.
func NewDNSProviderConfig(config *Config) (*DNSProvider, error) {
if config == nil {
return nil, errors.New("cloudflare: the configuration of the DNS provider is nil")
}
if config.TTL < minTTL {
return nil, fmt.Errorf("cloudflare: invalid TTL, TTL (%d) must be greater than %d", config.TTL, minTTL)
}
client, err := cloudflare.New(config.AuthKey, config.AuthEmail, cloudflare.HTTPClient(config.HTTPClient))
if err != nil {
return nil, err
}
// TODO: must be remove. keep only for compatibility reason.
client.BaseURL = CloudFlareAPIURL
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, _ := acme.DNS01Record(domain, keyAuth)
authZone, err := acme.FindZoneByFqdn(fqdn, acme.RecursiveNameservers)
if err != nil {
return fmt.Errorf("cloudflare: %v", err)
}
zoneID, err := d.client.ZoneIDByName(acme.UnFqdn(authZone))
if err != nil {
return fmt.Errorf("cloudflare: failed to find zone %s: %v", authZone, err)
}
dnsRecord := cloudflare.DNSRecord{
Type: "TXT",
Name: acme.UnFqdn(fqdn),
Content: value,
TTL: d.config.TTL,
}
response, err := d.client.CreateDNSRecord(zoneID, dnsRecord)
if err != nil {
return fmt.Errorf("cloudflare: failed to create TXT record: %v", err)
}
if !response.Success {
return fmt.Errorf("cloudflare: failed to create TXT record: %+v %+v", response.Errors, response.Messages)
}
log.Infof("cloudflare: new record for %s, ID %s", domain, response.Result.ID)
return nil
}
// CleanUp removes the TXT record matching the specified parameters
func (d *DNSProvider) CleanUp(domain, token, keyAuth string) error {
fqdn, _, _ := acme.DNS01Record(domain, keyAuth)
authZone, err := acme.FindZoneByFqdn(fqdn, acme.RecursiveNameservers)
if err != nil {
return fmt.Errorf("cloudflare: %v", err)
}
zoneID, err := d.client.ZoneIDByName(acme.UnFqdn(authZone))
if err != nil {
return fmt.Errorf("cloudflare: failed to find zone %s: %v", authZone, err)
}
dnsRecord := cloudflare.DNSRecord{
Type: "TXT",
Name: acme.UnFqdn(fqdn),
}
records, err := d.client.DNSRecords(zoneID, dnsRecord)
if err != nil {
return fmt.Errorf("cloudflare: failed to find TXT records: %v", err)
}
for _, record := range records {
err = d.client.DeleteDNSRecord(zoneID, record.ID)
if err != nil {
log.Printf("cloudflare: failed to delete TXT record: %v", err)
}
}
return nil
}