Migrate to go-acme/lego.

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

@@ -0,0 +1,179 @@
+// Package vultr implements a DNS provider for solving the DNS-01 challenge using the vultr DNS.
+// See https://www.vultr.com/api/#dns
+package vultr
+
+import (
+	"crypto/tls"
+	"errors"
+	"fmt"
+	"net/http"
+	"strings"
+	"time"
+
+	vultr "github.com/JamesClonk/vultr/lib"
+	"github.com/go-acme/lego/challenge/dns01"
+	"github.com/go-acme/lego/platform/config/env"
+)
+
+// Config is used to configure the creation of the DNSProvider
+type Config struct {
+	APIKey             string
+	PropagationTimeout time.Duration
+	PollingInterval    time.Duration
+	TTL                int
+	HTTPClient         *http.Client
+}
+
+// NewDefaultConfig returns a default configuration for the DNSProvider
+func NewDefaultConfig() *Config {
+	return &Config{
+		TTL:                env.GetOrDefaultInt("VULTR_TTL", dns01.DefaultTTL),
+		PropagationTimeout: env.GetOrDefaultSecond("VULTR_PROPAGATION_TIMEOUT", dns01.DefaultPropagationTimeout),
+		PollingInterval:    env.GetOrDefaultSecond("VULTR_POLLING_INTERVAL", dns01.DefaultPollingInterval),
+		HTTPClient: &http.Client{
+			Timeout: env.GetOrDefaultSecond("VULTR_HTTP_TIMEOUT", 0),
+			// from Vultr Client
+			Transport: &http.Transport{
+				TLSNextProto: make(map[string]func(string, *tls.Conn) http.RoundTripper),
+			},
+		},
+	}
+}
+
+// DNSProvider is an implementation of the acme.ChallengeProvider interface.
+type DNSProvider struct {
+	config *Config
+	client *vultr.Client
+}
+
+// NewDNSProvider returns a DNSProvider instance with a configured Vultr client.
+// Authentication uses the VULTR_API_KEY environment variable.
+func NewDNSProvider() (*DNSProvider, error) {
+	values, err := env.Get("VULTR_API_KEY")
+	if err != nil {
+		return nil, fmt.Errorf("vultr: %v", err)
+	}
+
+	config := NewDefaultConfig()
+	config.APIKey = values["VULTR_API_KEY"]
+
+	return NewDNSProviderConfig(config)
+}
+
+// NewDNSProviderConfig return a DNSProvider instance configured for Vultr.
+func NewDNSProviderConfig(config *Config) (*DNSProvider, error) {
+	if config == nil {
+		return nil, errors.New("vultr: the configuration of the DNS provider is nil")
+	}
+
+	if config.APIKey == "" {
+		return nil, fmt.Errorf("vultr: credentials missing")
+	}
+
+	options := &vultr.Options{
+		HTTPClient: config.HTTPClient,
+	}
+	client := vultr.NewClient(config.APIKey, options)
+
+	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)
+
+	zoneDomain, err := d.getHostedZone(domain)
+	if err != nil {
+		return fmt.Errorf("vultr: %v", err)
+	}
+
+	name := d.extractRecordName(fqdn, zoneDomain)
+
+	err = d.client.CreateDNSRecord(zoneDomain, name, "TXT", `"`+value+`"`, 0, d.config.TTL)
+	if err != nil {
+		return fmt.Errorf("vultr: 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)
+
+	zoneDomain, records, err := d.findTxtRecords(domain, fqdn)
+	if err != nil {
+		return fmt.Errorf("vultr: %v", err)
+	}
+
+	var allErr []string
+	for _, rec := range records {
+		err := d.client.DeleteDNSRecord(zoneDomain, rec.RecordID)
+		if err != nil {
+			allErr = append(allErr, err.Error())
+		}
+	}
+
+	if len(allErr) > 0 {
+		return errors.New(strings.Join(allErr, ": "))
+	}
+
+	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) (string, error) {
+	domains, err := d.client.GetDNSDomains()
+	if err != nil {
+		return "", fmt.Errorf("API call failed: %v", err)
+	}
+
+	var hostedDomain vultr.DNSDomain
+	for _, dom := range domains {
+		if strings.HasSuffix(domain, dom.Domain) {
+			if len(dom.Domain) > len(hostedDomain.Domain) {
+				hostedDomain = dom
+			}
+		}
+	}
+	if hostedDomain.Domain == "" {
+		return "", fmt.Errorf("no matching Vultr domain found for domain %s", domain)
+	}
+
+	return hostedDomain.Domain, nil
+}
+
+func (d *DNSProvider) findTxtRecords(domain, fqdn string) (string, []vultr.DNSRecord, error) {
+	zoneDomain, err := d.getHostedZone(domain)
+	if err != nil {
+		return "", nil, err
+	}
+
+	var records []vultr.DNSRecord
+	result, err := d.client.GetDNSRecords(zoneDomain)
+	if err != nil {
+		return "", records, fmt.Errorf("API call has failed: %v", err)
+	}
+
+	recordName := d.extractRecordName(fqdn, zoneDomain)
+	for _, record := range result {
+		if record.Type == "TXT" && record.Name == recordName {
+			records = append(records, record)
+		}
+	}
+
+	return zoneDomain, records, nil
+}
+
+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
+}