mirror of
https://github.com/go-acme/lego.git
synced 2024-12-23 09:15:11 +02:00
135 lines
3.9 KiB
Go
135 lines
3.9 KiB
Go
package azure
|
|
|
|
import (
|
|
"context"
|
|
"errors"
|
|
"fmt"
|
|
"net/http"
|
|
"time"
|
|
|
|
"github.com/Azure/azure-sdk-for-go/profiles/latest/dns/mgmt/dns"
|
|
"github.com/Azure/go-autorest/autorest"
|
|
"github.com/Azure/go-autorest/autorest/to"
|
|
"github.com/go-acme/lego/v4/challenge/dns01"
|
|
"github.com/go-acme/lego/v4/platform/config/env"
|
|
)
|
|
|
|
// dnsProviderPublic implements the challenge.Provider interface for Azure Public Zone DNS.
|
|
type dnsProviderPublic struct {
|
|
config *Config
|
|
authorizer autorest.Authorizer
|
|
}
|
|
|
|
// Timeout returns the timeout and interval to use when checking for DNS propagation.
|
|
// Adjusting here to cope with spikes in propagation times.
|
|
func (d *dnsProviderPublic) 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 *dnsProviderPublic) Present(domain, token, keyAuth string) error {
|
|
ctx := context.Background()
|
|
info := dns01.GetChallengeInfo(domain, keyAuth)
|
|
|
|
zone, err := d.getHostedZoneID(ctx, info.EffectiveFQDN)
|
|
if err != nil {
|
|
return fmt.Errorf("azure: %w", err)
|
|
}
|
|
|
|
rsc := dns.NewRecordSetsClientWithBaseURI(d.config.ResourceManagerEndpoint, d.config.SubscriptionID)
|
|
rsc.Authorizer = d.authorizer
|
|
|
|
subDomain, err := dns01.ExtractSubDomain(info.EffectiveFQDN, zone)
|
|
if err != nil {
|
|
return fmt.Errorf("azure: %w", err)
|
|
}
|
|
|
|
// Get existing record set
|
|
rset, err := rsc.Get(ctx, d.config.ResourceGroup, zone, subDomain, dns.TXT)
|
|
if err != nil {
|
|
var detailed autorest.DetailedError
|
|
if !errors.As(err, &detailed) || detailed.StatusCode != http.StatusNotFound {
|
|
return fmt.Errorf("azure: %w", err)
|
|
}
|
|
}
|
|
|
|
// Construct unique TXT records using map
|
|
uniqRecords := map[string]struct{}{info.Value: {}}
|
|
if rset.RecordSetProperties != nil && rset.TxtRecords != nil {
|
|
for _, txtRecord := range *rset.TxtRecords {
|
|
// Assume Value doesn't contain multiple strings
|
|
values := to.StringSlice(txtRecord.Value)
|
|
if len(values) > 0 {
|
|
uniqRecords[values[0]] = struct{}{}
|
|
}
|
|
}
|
|
}
|
|
|
|
var txtRecords []dns.TxtRecord
|
|
for txt := range uniqRecords {
|
|
txtRecords = append(txtRecords, dns.TxtRecord{Value: &[]string{txt}})
|
|
}
|
|
|
|
rec := dns.RecordSet{
|
|
Name: &subDomain,
|
|
RecordSetProperties: &dns.RecordSetProperties{
|
|
TTL: to.Int64Ptr(int64(d.config.TTL)),
|
|
TxtRecords: &txtRecords,
|
|
},
|
|
}
|
|
|
|
_, err = rsc.CreateOrUpdate(ctx, d.config.ResourceGroup, zone, subDomain, dns.TXT, rec, "", "")
|
|
if err != nil {
|
|
return fmt.Errorf("azure: %w", err)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// CleanUp removes the TXT record matching the specified parameters.
|
|
func (d *dnsProviderPublic) CleanUp(domain, token, keyAuth string) error {
|
|
ctx := context.Background()
|
|
info := dns01.GetChallengeInfo(domain, keyAuth)
|
|
|
|
zone, err := d.getHostedZoneID(ctx, info.EffectiveFQDN)
|
|
if err != nil {
|
|
return fmt.Errorf("azure: %w", err)
|
|
}
|
|
|
|
subDomain, err := dns01.ExtractSubDomain(info.EffectiveFQDN, zone)
|
|
if err != nil {
|
|
return fmt.Errorf("azure: %w", err)
|
|
}
|
|
|
|
rsc := dns.NewRecordSetsClientWithBaseURI(d.config.ResourceManagerEndpoint, d.config.SubscriptionID)
|
|
rsc.Authorizer = d.authorizer
|
|
|
|
_, err = rsc.Delete(ctx, d.config.ResourceGroup, zone, subDomain, dns.TXT, "")
|
|
if err != nil {
|
|
return fmt.Errorf("azure: %w", err)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// Checks that azure has a zone for this domain name.
|
|
func (d *dnsProviderPublic) getHostedZoneID(ctx context.Context, fqdn string) (string, error) {
|
|
if zone := env.GetOrFile(EnvZoneName); zone != "" {
|
|
return zone, nil
|
|
}
|
|
|
|
authZone, err := dns01.FindZoneByFqdn(fqdn)
|
|
if err != nil {
|
|
return "", fmt.Errorf("could not find zone: %w", err)
|
|
}
|
|
|
|
dc := dns.NewZonesClientWithBaseURI(d.config.ResourceManagerEndpoint, d.config.SubscriptionID)
|
|
dc.Authorizer = d.authorizer
|
|
|
|
zone, err := dc.Get(ctx, d.config.ResourceGroup, dns01.UnFqdn(authZone))
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
|
|
// zone.Name shouldn't have a trailing dot(.)
|
|
return to.String(zone.Name), nil
|
|
}
|