Migrate to go-acme/lego.

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

@@ -0,0 +1,182 @@
+// Package netcup implements a DNS Provider for solving the DNS-01 challenge using the netcup DNS API.
+package netcup
+
+import (
+	"errors"
+	"fmt"
+	"net/http"
+	"strings"
+	"time"
+
+	"github.com/go-acme/lego/providers/dns/netcup/internal"
+
+	"github.com/go-acme/lego/challenge/dns01"
+	"github.com/go-acme/lego/log"
+	"github.com/go-acme/lego/platform/config/env"
+)
+
+// Config is used to configure the creation of the DNSProvider
+type Config struct {
+	Key                string
+	Password           string
+	Customer           string
+	TTL                int
+	PropagationTimeout time.Duration
+	PollingInterval    time.Duration
+	HTTPClient         *http.Client
+}
+
+// NewDefaultConfig returns a default configuration for the DNSProvider
+func NewDefaultConfig() *Config {
+	return &Config{
+		TTL:                env.GetOrDefaultInt("NETCUP_TTL", dns01.DefaultTTL),
+		PropagationTimeout: env.GetOrDefaultSecond("NETCUP_PROPAGATION_TIMEOUT", 120*time.Second),
+		PollingInterval:    env.GetOrDefaultSecond("NETCUP_POLLING_INTERVAL", 5*time.Second),
+		HTTPClient: &http.Client{
+			Timeout: env.GetOrDefaultSecond("NETCUP_HTTP_TIMEOUT", 10*time.Second),
+		},
+	}
+}
+
+// DNSProvider is an implementation of the acme.ChallengeProvider interface
+type DNSProvider struct {
+	client *internal.Client
+	config *Config
+}
+
+// NewDNSProvider returns a DNSProvider instance configured for netcup.
+// Credentials must be passed in the environment variables:
+// NETCUP_CUSTOMER_NUMBER, NETCUP_API_KEY, NETCUP_API_PASSWORD
+func NewDNSProvider() (*DNSProvider, error) {
+	values, err := env.Get("NETCUP_CUSTOMER_NUMBER", "NETCUP_API_KEY", "NETCUP_API_PASSWORD")
+	if err != nil {
+		return nil, fmt.Errorf("netcup: %v", err)
+	}
+
+	config := NewDefaultConfig()
+	config.Customer = values["NETCUP_CUSTOMER_NUMBER"]
+	config.Key = values["NETCUP_API_KEY"]
+	config.Password = values["NETCUP_API_PASSWORD"]
+
+	return NewDNSProviderConfig(config)
+}
+
+// NewDNSProviderConfig return a DNSProvider instance configured for netcup.
+func NewDNSProviderConfig(config *Config) (*DNSProvider, error) {
+	if config == nil {
+		return nil, errors.New("netcup: the configuration of the DNS provider is nil")
+	}
+
+	client, err := internal.NewClient(config.Customer, config.Key, config.Password)
+	if err != nil {
+		return nil, fmt.Errorf("netcup: %v", err)
+	}
+
+	client.HTTPClient = config.HTTPClient
+
+	return &DNSProvider{client: client, config: config}, nil
+}
+
+// Present creates a TXT record to fulfill the dns-01 challenge
+func (d *DNSProvider) Present(domainName, token, keyAuth string) error {
+	fqdn, value := dns01.GetRecord(domainName, keyAuth)
+
+	zone, err := dns01.FindZoneByFqdn(fqdn)
+	if err != nil {
+		return fmt.Errorf("netcup: failed to find DNSZone, %v", err)
+	}
+
+	sessionID, err := d.client.Login()
+	if err != nil {
+		return fmt.Errorf("netcup: %v", err)
+	}
+
+	defer func() {
+		err = d.client.Logout(sessionID)
+		if err != nil {
+			log.Print("netcup: %v", err)
+		}
+	}()
+
+	hostname := strings.Replace(fqdn, "."+zone, "", 1)
+	record := internal.DNSRecord{
+		Hostname:    hostname,
+		RecordType:  "TXT",
+		Destination: value,
+		TTL:         d.config.TTL,
+	}
+
+	zone = dns01.UnFqdn(zone)
+
+	records, err := d.client.GetDNSRecords(zone, sessionID)
+	if err != nil {
+		// skip no existing records
+		log.Infof("no existing records, error ignored: %v", err)
+	}
+
+	records = append(records, record)
+
+	err = d.client.UpdateDNSRecord(sessionID, zone, records)
+	if err != nil {
+		return fmt.Errorf("netcup: failed to add TXT-Record: %v", err)
+	}
+
+	return nil
+}
+
+// CleanUp removes the TXT record matching the specified parameters
+func (d *DNSProvider) CleanUp(domainName, token, keyAuth string) error {
+	fqdn, value := dns01.GetRecord(domainName, keyAuth)
+
+	zone, err := dns01.FindZoneByFqdn(fqdn)
+	if err != nil {
+		return fmt.Errorf("netcup: failed to find DNSZone, %v", err)
+	}
+
+	sessionID, err := d.client.Login()
+	if err != nil {
+		return fmt.Errorf("netcup: %v", err)
+	}
+
+	defer func() {
+		err = d.client.Logout(sessionID)
+		if err != nil {
+			log.Print("netcup: %v", err)
+		}
+	}()
+
+	hostname := strings.Replace(fqdn, "."+zone, "", 1)
+
+	zone = dns01.UnFqdn(zone)
+
+	records, err := d.client.GetDNSRecords(zone, sessionID)
+	if err != nil {
+		return fmt.Errorf("netcup: %v", err)
+	}
+
+	record := internal.DNSRecord{
+		Hostname:    hostname,
+		RecordType:  "TXT",
+		Destination: value,
+	}
+
+	idx, err := internal.GetDNSRecordIdx(records, record)
+	if err != nil {
+		return fmt.Errorf("netcup: %v", err)
+	}
+
+	records[idx].DeleteRecord = true
+
+	err = d.client.UpdateDNSRecord(sessionID, zone, []internal.DNSRecord{records[idx]})
+	if err != nil {
+		return fmt.Errorf("netcup: %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
+}