Migrate to go-acme/lego.

vendor/github.com/go-acme/lego/providers/dns/sakuracloud/sakuracloud.go

@@ -0,0 +1,173 @@
+// Package sakuracloud implements a DNS provider for solving the DNS-01 challenge using SakuraCloud DNS.
+package sakuracloud
+
+import (
+	"errors"
+	"fmt"
+	"net/http"
+	"strings"
+	"time"
+
+	"github.com/go-acme/lego/challenge/dns01"
+	"github.com/go-acme/lego/platform/config/env"
+	"github.com/sacloud/libsacloud/api"
+	"github.com/sacloud/libsacloud/sacloud"
+)
+
+// Config is used to configure the creation of the DNSProvider
+type Config struct {
+	Token              string
+	Secret             string
+	PropagationTimeout time.Duration
+	PollingInterval    time.Duration
+	TTL                int
+}
+
+// NewDefaultConfig returns a default configuration for the DNSProvider
+func NewDefaultConfig() *Config {
+	return &Config{
+		TTL:                env.GetOrDefaultInt("SAKURACLOUD_TTL", dns01.DefaultTTL),
+		PropagationTimeout: env.GetOrDefaultSecond("SAKURACLOUD_PROPAGATION_TIMEOUT", dns01.DefaultPropagationTimeout),
+		PollingInterval:    env.GetOrDefaultSecond("SAKURACLOUD_POLLING_INTERVAL", dns01.DefaultPollingInterval),
+	}
+}
+
+// DNSProvider is an implementation of the acme.ChallengeProvider interface.
+type DNSProvider struct {
+	config *Config
+	client *api.Client
+}
+
+// NewDNSProvider returns a DNSProvider instance configured for SakuraCloud.
+// Credentials must be passed in the environment variables: SAKURACLOUD_ACCESS_TOKEN & SAKURACLOUD_ACCESS_TOKEN_SECRET
+func NewDNSProvider() (*DNSProvider, error) {
+	values, err := env.Get("SAKURACLOUD_ACCESS_TOKEN", "SAKURACLOUD_ACCESS_TOKEN_SECRET")
+	if err != nil {
+		return nil, fmt.Errorf("sakuracloud: %v", err)
+	}
+
+	config := NewDefaultConfig()
+	config.Token = values["SAKURACLOUD_ACCESS_TOKEN"]
+	config.Secret = values["SAKURACLOUD_ACCESS_TOKEN_SECRET"]
+
+	return NewDNSProviderConfig(config)
+}
+
+// NewDNSProviderConfig return a DNSProvider instance configured for SakuraCloud.
+func NewDNSProviderConfig(config *Config) (*DNSProvider, error) {
+	if config == nil {
+		return nil, errors.New("sakuracloud: the configuration of the DNS provider is nil")
+	}
+
+	if config.Token == "" {
+		return nil, errors.New("sakuracloud: AccessToken is missing")
+	}
+
+	if config.Secret == "" {
+		return nil, errors.New("sakuracloud: AccessSecret is missing")
+	}
+
+	client := api.NewClient(config.Token, config.Secret, "tk1a")
+
+	return &DNSProvider{client: client, config: config}, 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)
+
+	zone, err := d.getHostedZone(domain)
+	if err != nil {
+		return fmt.Errorf("sakuracloud: %v", err)
+	}
+
+	name := d.extractRecordName(fqdn, zone.Name)
+
+	zone.AddRecord(zone.CreateNewRecord(name, "TXT", value, d.config.TTL))
+	_, err = d.client.GetDNSAPI().Update(zone.ID, zone)
+	if err != nil {
+		return fmt.Errorf("sakuracloud: API call failed: %v", err)
+	}
+
+	return nil
+}
+
+// CleanUp removes the TXT record matching the specified parameters.
+func (d *DNSProvider) CleanUp(domain, token, keyAuth string) error {
+	fqdn, _ := dns01.GetRecord(domain, keyAuth)
+
+	zone, err := d.getHostedZone(domain)
+	if err != nil {
+		return fmt.Errorf("sakuracloud: %v", err)
+	}
+
+	records := d.findTxtRecords(fqdn, zone)
+
+	for _, record := range records {
+		var updRecords []sacloud.DNSRecordSet
+		for _, r := range zone.Settings.DNS.ResourceRecordSets {
+			if !(r.Name == record.Name && r.Type == record.Type && r.RData == record.RData) {
+				updRecords = append(updRecords, r)
+			}
+		}
+		zone.Settings.DNS.ResourceRecordSets = updRecords
+	}
+
+	_, err = d.client.GetDNSAPI().Update(zone.ID, zone)
+	if err != nil {
+		return fmt.Errorf("sakuracloud: API call failed: %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
+}
+
+func (d *DNSProvider) getHostedZone(domain string) (*sacloud.DNS, error) {
+	authZone, err := dns01.FindZoneByFqdn(dns01.ToFqdn(domain))
+	if err != nil {
+		return nil, err
+	}
+
+	zoneName := dns01.UnFqdn(authZone)
+
+	res, err := d.client.GetDNSAPI().WithNameLike(zoneName).Find()
+	if err != nil {
+		if notFound, ok := err.(api.Error); ok && notFound.ResponseCode() == http.StatusNotFound {
+			return nil, fmt.Errorf("zone %s not found on SakuraCloud DNS: %v", zoneName, err)
+		}
+		return nil, fmt.Errorf("API call failed: %v", err)
+	}
+
+	for _, zone := range res.CommonServiceDNSItems {
+		if zone.Name == zoneName {
+			return &zone, nil
+		}
+	}
+
+	return nil, fmt.Errorf("zone %s not found", zoneName)
+}
+
+func (d *DNSProvider) findTxtRecords(fqdn string, zone *sacloud.DNS) []sacloud.DNSRecordSet {
+	recordName := d.extractRecordName(fqdn, zone.Name)
+
+	var res []sacloud.DNSRecordSet
+	for _, record := range zone.Settings.DNS.ResourceRecordSets {
+		if record.Name == recordName && record.Type == "TXT" {
+			res = append(res, record)
+		}
+	}
+	return res
+}
+
+func (d *DNSProvider) extractRecordName(fqdn, domain string) string {
+	name := dns01.UnFqdn(fqdn)
+	if idx := strings.Index(name, "."+domain); idx != -1 {
+		return name[:idx]
+	}
+	return name
+}