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package auroradns
import (
"fmt"
"github.com/edeckers/auroradnsclient"
"github.com/edeckers/auroradnsclient/records"
"github.com/edeckers/auroradnsclient/zones"
"github.com/xenolf/lego/acme"
"os"
"sync"
)
// 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) {
userID := os.Getenv("AURORA_USER_ID")
key := os.Getenv("AURORA_KEY")
endpoint := os.Getenv("AURORA_ENDPOINT")
if endpoint == "" {
endpoint = "https://api.auroradns.eu"
}
return NewDNSProviderCredentials(endpoint, userID, key)
}
// NewDNSProviderCredentials uses the supplied credentials to return a
// DNSProvider instance configured for AuroraDNS.
func NewDNSProviderCredentials(baseURL string, userID string, key string) (*DNSProvider, error) {
client, err := auroradnsclient.NewAuroraDNSClient(baseURL, userID, key)
if err != nil {
return nil, err
}
return &DNSProvider{
client: client,
recordIDs: make(map[string]string),
}, nil
}
func (provider *DNSProvider) getZoneInformationByName(name string) (zones.ZoneRecord, error) {
zs, err := provider.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 (provider *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 := provider.getZoneInformationByName(authZone)
reqData :=
records.CreateRecordRequest{
RecordType: "TXT",
Name: subdomain,
Content: value,
TTL: 300,
}
respData, err := provider.client.CreateRecord(zoneRecord.ID, reqData)
if err != nil {
return fmt.Errorf("Could not create record: '%s'.", err)
}
provider.recordIDsMu.Lock()
provider.recordIDs[fqdn] = respData.ID
provider.recordIDsMu.Unlock()
return nil
}
// CleanUp removes a given record that was generated by Present
func (provider *DNSProvider) CleanUp(domain, token, keyAuth string) error {
fqdn, _, _ := acme.DNS01Record(domain, keyAuth)
provider.recordIDsMu.Lock()
recordID, ok := provider.recordIDs[fqdn]
provider.recordIDsMu.Unlock()
if !ok {
return fmt.Errorf("Unknown recordID for '%s'", fqdn)
}
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)
}
authZone = acme.UnFqdn(authZone)
zoneRecord, err := provider.getZoneInformationByName(authZone)
if err != nil {
return err
}
_, err = provider.client.RemoveRecord(zoneRecord.ID, recordID)
if err != nil {
return err
}
provider.recordIDsMu.Lock()
delete(provider.recordIDs, fqdn)
provider.recordIDsMu.Unlock()
return nil
}
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