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c4bbb4b819
* refactor: review DNS providers.
150 lines
3.9 KiB
Go
150 lines
3.9 KiB
Go
package auroradns
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import (
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"fmt"
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"os"
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"sync"
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"github.com/edeckers/auroradnsclient"
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"github.com/edeckers/auroradnsclient/records"
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"github.com/edeckers/auroradnsclient/zones"
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"github.com/xenolf/lego/acme"
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"github.com/xenolf/lego/platform/config/env"
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)
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// DNSProvider describes a provider for AuroraDNS
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type DNSProvider struct {
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recordIDs map[string]string
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recordIDsMu sync.Mutex
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client *auroradnsclient.AuroraDNSClient
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}
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// NewDNSProvider returns a DNSProvider instance configured for AuroraDNS.
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// Credentials must be passed in the environment variables: AURORA_USER_ID
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// and AURORA_KEY.
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func NewDNSProvider() (*DNSProvider, error) {
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values, err := env.Get("AURORA_USER_ID", "AURORA_KEY")
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if err != nil {
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return nil, fmt.Errorf("AuroraDNS: %v", err)
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}
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endpoint := os.Getenv("AURORA_ENDPOINT")
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return NewDNSProviderCredentials(endpoint, values["AURORA_USER_ID"], values["AURORA_KEY"])
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}
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// NewDNSProviderCredentials uses the supplied credentials to return a
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// DNSProvider instance configured for AuroraDNS.
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func NewDNSProviderCredentials(baseURL string, userID string, key string) (*DNSProvider, error) {
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if baseURL == "" {
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baseURL = "https://api.auroradns.eu"
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}
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client, err := auroradnsclient.NewAuroraDNSClient(baseURL, userID, key)
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if err != nil {
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return nil, err
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}
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return &DNSProvider{
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client: client,
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recordIDs: make(map[string]string),
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}, nil
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}
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func (provider *DNSProvider) getZoneInformationByName(name string) (zones.ZoneRecord, error) {
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zs, err := provider.client.GetZones()
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if err != nil {
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return zones.ZoneRecord{}, err
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}
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for _, element := range zs {
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if element.Name == name {
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return element, nil
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}
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}
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return zones.ZoneRecord{}, fmt.Errorf("could not find Zone record")
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}
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// Present creates a record with a secret
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func (provider *DNSProvider) Present(domain, token, keyAuth string) error {
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fqdn, value, _ := acme.DNS01Record(domain, keyAuth)
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authZone, err := acme.FindZoneByFqdn(acme.ToFqdn(domain), acme.RecursiveNameservers)
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if err != nil {
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return fmt.Errorf("could not determine zone for domain: '%s'. %s", domain, err)
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}
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// 1. Aurora will happily create the TXT record when it is provided a fqdn,
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// but it will only appear in the control panel and will not be
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// propagated to DNS servers. Extract and use subdomain instead.
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// 2. A trailing dot in the fqdn will cause Aurora to add a trailing dot to
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// the subdomain, resulting in _acme-challenge..<domain> rather
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// than _acme-challenge.<domain>
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subdomain := fqdn[0 : len(fqdn)-len(authZone)-1]
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authZone = acme.UnFqdn(authZone)
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zoneRecord, err := provider.getZoneInformationByName(authZone)
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if err != nil {
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return fmt.Errorf("could not create record: %v", err)
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}
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reqData :=
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records.CreateRecordRequest{
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RecordType: "TXT",
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Name: subdomain,
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Content: value,
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TTL: 300,
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}
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respData, err := provider.client.CreateRecord(zoneRecord.ID, reqData)
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if err != nil {
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return fmt.Errorf("could not create record: %v", err)
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}
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provider.recordIDsMu.Lock()
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provider.recordIDs[fqdn] = respData.ID
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provider.recordIDsMu.Unlock()
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return nil
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}
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// CleanUp removes a given record that was generated by Present
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func (provider *DNSProvider) CleanUp(domain, token, keyAuth string) error {
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fqdn, _, _ := acme.DNS01Record(domain, keyAuth)
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provider.recordIDsMu.Lock()
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recordID, ok := provider.recordIDs[fqdn]
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provider.recordIDsMu.Unlock()
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if !ok {
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return fmt.Errorf("unknown recordID for %q", fqdn)
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}
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authZone, err := acme.FindZoneByFqdn(acme.ToFqdn(domain), acme.RecursiveNameservers)
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if err != nil {
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return fmt.Errorf("could not determine zone for domain: %q. %v", domain, err)
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}
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authZone = acme.UnFqdn(authZone)
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zoneRecord, err := provider.getZoneInformationByName(authZone)
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if err != nil {
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return err
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}
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_, err = provider.client.RemoveRecord(zoneRecord.ID, recordID)
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if err != nil {
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return err
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}
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provider.recordIDsMu.Lock()
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delete(provider.recordIDs, fqdn)
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provider.recordIDsMu.Unlock()
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return nil
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}
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