traefik/vendor/github.com/go-acme/lego/providers/dns/easydns/easydns.go
Fernandez Ludovic 0034bef6b9 Update lego.
2019-06-12 02:54:03 +02:00

165 lines
4.3 KiB
Go

// Package easydns implements a DNS provider for solving the DNS-01 challenge using EasyDNS API.
package easydns
import (
"errors"
"fmt"
"net/http"
"net/url"
"strconv"
"strings"
"sync"
"time"
"github.com/miekg/dns"
"github.com/go-acme/lego/challenge/dns01"
"github.com/go-acme/lego/platform/config/env"
)
// Config is used to configure the creation of the DNSProvider
type Config struct {
Endpoint *url.URL
Token string
Key string
TTL int
HTTPClient *http.Client
PropagationTimeout time.Duration
PollingInterval time.Duration
SequenceInterval time.Duration
}
// NewDefaultConfig returns a default configuration for the DNSProvider
func NewDefaultConfig() *Config {
return &Config{
PropagationTimeout: env.GetOrDefaultSecond("EASYDNS_PROPAGATION_TIMEOUT", dns01.DefaultPropagationTimeout),
SequenceInterval: env.GetOrDefaultSecond("EASYDNS_SEQUENCE_INTERVAL", dns01.DefaultPropagationTimeout),
PollingInterval: env.GetOrDefaultSecond("EASYDNS_POLLING_INTERVAL", dns01.DefaultPollingInterval),
TTL: env.GetOrDefaultInt("EASYDNS_TTL", dns01.DefaultTTL),
HTTPClient: &http.Client{
Timeout: env.GetOrDefaultSecond("EASYDNS_HTTP_TIMEOUT", 30*time.Second),
},
}
}
// DNSProvider describes a provider for acme-proxy
type DNSProvider struct {
config *Config
recordIDs map[string]string
recordIDsMu sync.Mutex
}
// NewDNSProvider returns a DNSProvider instance.
func NewDNSProvider() (*DNSProvider, error) {
config := NewDefaultConfig()
endpoint, err := url.Parse(env.GetOrDefaultString("EASYDNS_ENDPOINT", defaultEndpoint))
if err != nil {
return nil, fmt.Errorf("easydns: %v", err)
}
config.Endpoint = endpoint
values, err := env.Get("EASYDNS_TOKEN", "EASYDNS_KEY")
if err != nil {
return nil, fmt.Errorf("easydns: %v", err)
}
config.Token = values["EASYDNS_TOKEN"]
config.Key = values["EASYDNS_KEY"]
return NewDNSProviderConfig(config)
}
// NewDNSProviderConfig return a DNSProvider .
func NewDNSProviderConfig(config *Config) (*DNSProvider, error) {
if config == nil {
return nil, errors.New("easydns: the configuration of the DNS provider is nil")
}
if config.Token == "" {
return nil, errors.New("easydns: the API token is missing")
}
if config.Key == "" {
return nil, errors.New("easydns: the API key is missing")
}
return &DNSProvider{config: config, recordIDs: map[string]string{}}, nil
}
// 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)
apiHost, apiDomain := splitFqdn(fqdn)
record := &zoneRecord{
Domain: apiDomain,
Host: apiHost,
Type: "TXT",
Rdata: value,
TTL: strconv.Itoa(d.config.TTL),
Prio: "0",
}
recordID, err := d.addRecord(apiDomain, record)
if err != nil {
return fmt.Errorf("easydns: error adding zone record: %v", err)
}
key := getMapKey(fqdn, value)
d.recordIDsMu.Lock()
d.recordIDs[key] = recordID
d.recordIDsMu.Unlock()
return nil
}
// CleanUp removes the TXT record matching the specified parameters
func (d *DNSProvider) CleanUp(domain, token, keyAuth string) error {
fqdn, challenge := dns01.GetRecord(domain, keyAuth)
key := getMapKey(fqdn, challenge)
recordID, exists := d.recordIDs[key]
if !exists {
return nil
}
_, apiDomain := splitFqdn(fqdn)
err := d.deleteRecord(apiDomain, recordID)
d.recordIDsMu.Lock()
defer delete(d.recordIDs, key)
d.recordIDsMu.Unlock()
if err != nil {
return fmt.Errorf("easydns: %v", err)
}
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
}
// Sequential All DNS challenges for this provider will be resolved sequentially.
// Returns the interval between each iteration.
func (d *DNSProvider) Sequential() time.Duration {
return d.config.SequenceInterval
}
func splitFqdn(fqdn string) (host, domain string) {
parts := dns.SplitDomainName(fqdn)
length := len(parts)
host = strings.Join(parts[0:length-2], ".")
domain = strings.Join(parts[length-2:length], ".")
return
}
func getMapKey(fqdn, value string) string {
return fqdn + "|" + value
}