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lego/providers/dns/auroradns/auroradns.go
Ludovic Fernandez a1585a7b9a
Review DNS providers (#580)
* refactor: create log.Infof and log.Warnf
* refactor: review DNS providers.
    - use one `http.Client` by provider instead of one client by request
    - use the same receiver name `d` for all `DNSProvider`
    - use `http.MethodXXX`
* refactor: logger init.
2018-06-21 19:06:16 +02:00

150 lines
3.8 KiB
Go

package auroradns
import (
"fmt"
"os"
"sync"
"github.com/edeckers/auroradnsclient"
"github.com/edeckers/auroradnsclient/records"
"github.com/edeckers/auroradnsclient/zones"
"github.com/xenolf/lego/acme"
"github.com/xenolf/lego/platform/config/env"
)
// DNSProvider describes a provider for AuroraDNS
type DNSProvider struct {
recordIDs map[string]string
recordIDsMu sync.Mutex
client *auroradnsclient.AuroraDNSClient
}
// NewDNSProvider returns a DNSProvider instance configured for AuroraDNS.
// Credentials must be passed in the environment variables: AURORA_USER_ID
// and AURORA_KEY.
func NewDNSProvider() (*DNSProvider, error) {
values, err := env.Get("AURORA_USER_ID", "AURORA_KEY")
if err != nil {
return nil, fmt.Errorf("AuroraDNS: %v", err)
}
endpoint := os.Getenv("AURORA_ENDPOINT")
return NewDNSProviderCredentials(endpoint, values["AURORA_USER_ID"], values["AURORA_KEY"])
}
// NewDNSProviderCredentials uses the supplied credentials to return a
// DNSProvider instance configured for AuroraDNS.
func NewDNSProviderCredentials(baseURL string, userID string, key string) (*DNSProvider, error) {
if baseURL == "" {
baseURL = "https://api.auroradns.eu"
}
client, err := auroradnsclient.NewAuroraDNSClient(baseURL, userID, key)
if err != nil {
return nil, err
}
return &DNSProvider{
client: client,
recordIDs: make(map[string]string),
}, nil
}
func (d *DNSProvider) getZoneInformationByName(name string) (zones.ZoneRecord, error) {
zs, err := d.client.GetZones()
if err != nil {
return zones.ZoneRecord{}, err
}
for _, element := range zs {
if element.Name == name {
return element, nil
}
}
return zones.ZoneRecord{}, fmt.Errorf("could not find Zone record")
}
// Present creates a record with a secret
func (d *DNSProvider) Present(domain, token, keyAuth string) error {
fqdn, value, _ := acme.DNS01Record(domain, keyAuth)
authZone, err := acme.FindZoneByFqdn(acme.ToFqdn(domain), acme.RecursiveNameservers)
if err != nil {
return fmt.Errorf("could not determine zone for domain: '%s'. %s", domain, err)
}
// 1. Aurora will happily create the TXT record when it is provided a fqdn,
// but it will only appear in the control panel and will not be
// propagated to DNS servers. Extract and use subdomain instead.
// 2. A trailing dot in the fqdn will cause Aurora to add a trailing dot to
// the subdomain, resulting in _acme-challenge..<domain> rather
// than _acme-challenge.<domain>
subdomain := fqdn[0 : len(fqdn)-len(authZone)-1]
authZone = acme.UnFqdn(authZone)
zoneRecord, err := d.getZoneInformationByName(authZone)
if err != nil {
return fmt.Errorf("could not create record: %v", err)
}
reqData :=
records.CreateRecordRequest{
RecordType: "TXT",
Name: subdomain,
Content: value,
TTL: 300,
}
respData, err := d.client.CreateRecord(zoneRecord.ID, reqData)
if err != nil {
return fmt.Errorf("could not create record: %v", err)
}
d.recordIDsMu.Lock()
d.recordIDs[fqdn] = respData.ID
d.recordIDsMu.Unlock()
return nil
}
// CleanUp removes a given record that was generated by Present
func (d *DNSProvider) CleanUp(domain, token, keyAuth string) error {
fqdn, _, _ := acme.DNS01Record(domain, keyAuth)
d.recordIDsMu.Lock()
recordID, ok := d.recordIDs[fqdn]
d.recordIDsMu.Unlock()
if !ok {
return fmt.Errorf("unknown recordID for %q", fqdn)
}
authZone, err := acme.FindZoneByFqdn(acme.ToFqdn(domain), acme.RecursiveNameservers)
if err != nil {
return fmt.Errorf("could not determine zone for domain: %q. %v", domain, err)
}
authZone = acme.UnFqdn(authZone)
zoneRecord, err := d.getZoneInformationByName(authZone)
if err != nil {
return err
}
_, err = d.client.RemoveRecord(zoneRecord.ID, recordID)
if err != nil {
return err
}
d.recordIDsMu.Lock()
delete(d.recordIDs, fqdn)
d.recordIDsMu.Unlock()
return nil
}