forked from TrueCloudLab/lego
142 lines
4.1 KiB
Go
142 lines
4.1 KiB
Go
// Package namesilo implements a DNS provider for solving the DNS-01 challenge using namesilo DNS.
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package namesilo
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import (
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"errors"
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"fmt"
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"strings"
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"time"
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"github.com/go-acme/lego/v3/challenge/dns01"
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"github.com/go-acme/lego/v3/platform/config/env"
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"github.com/nrdcg/namesilo"
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)
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const (
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defaultTTL = 3600
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maxTTL = 2592000
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)
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// Config is used to configure the creation of the DNSProvider
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type Config struct {
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APIKey string
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PropagationTimeout time.Duration
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PollingInterval time.Duration
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TTL int
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}
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// NewDefaultConfig returns a default configuration for the DNSProvider
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func NewDefaultConfig() *Config {
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return &Config{
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PropagationTimeout: env.GetOrDefaultSecond("NAMESILO_PROPAGATION_TIMEOUT", dns01.DefaultPropagationTimeout),
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PollingInterval: env.GetOrDefaultSecond("NAMESILO_POLLING_INTERVAL", dns01.DefaultPollingInterval),
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TTL: env.GetOrDefaultInt("NAMESILO_TTL", defaultTTL),
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}
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}
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// DNSProvider is an implementation of the challenge.Provider interface.
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type DNSProvider struct {
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client *namesilo.Client
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config *Config
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}
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// NewDNSProvider returns a DNSProvider instance configured for namesilo.
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// API_KEY must be passed in the environment variables: NAMESILO_API_KEY.
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//
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// See: https://www.namesilo.com/api_reference.php
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func NewDNSProvider() (*DNSProvider, error) {
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values, err := env.Get("NAMESILO_API_KEY")
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if err != nil {
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return nil, fmt.Errorf("namesilo: %v", err)
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}
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config := NewDefaultConfig()
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config.APIKey = values["NAMESILO_API_KEY"]
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return NewDNSProviderConfig(config)
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}
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// NewDNSProviderConfig return a DNSProvider instance configured for Namesilo.
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func NewDNSProviderConfig(config *Config) (*DNSProvider, error) {
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if config == nil {
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return nil, errors.New("namesilo: the configuration of the DNS provider is nil")
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}
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if config.TTL < defaultTTL || config.TTL > maxTTL {
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return nil, fmt.Errorf("namesilo: TTL should be in [%d, %d]", defaultTTL, maxTTL)
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}
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transport, err := namesilo.NewTokenTransport(config.APIKey)
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if err != nil {
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return nil, fmt.Errorf("namesilo: %v", err)
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}
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return &DNSProvider{client: namesilo.NewClient(transport.Client()), config: config}, nil
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}
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// Present creates a TXT record to fulfill the dns-01 challenge.
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func (d *DNSProvider) Present(domain, token, keyAuth string) error {
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fqdn, value := dns01.GetRecord(domain, keyAuth)
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zoneName, err := getZoneNameByDomain(domain)
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if err != nil {
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return fmt.Errorf("namesilo: %v", err)
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}
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_, err = d.client.DnsAddRecord(&namesilo.DnsAddRecordParams{
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Domain: zoneName,
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Type: "TXT",
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Host: getRecordName(fqdn, zoneName),
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Value: value,
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TTL: d.config.TTL,
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})
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if err != nil {
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return fmt.Errorf("namesilo: failed to add record %v", err)
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}
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return nil
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}
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// CleanUp removes the TXT record matching the specified parameters.
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func (d *DNSProvider) CleanUp(domain, token, keyAuth string) error {
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fqdn, _ := dns01.GetRecord(domain, keyAuth)
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zoneName, err := getZoneNameByDomain(domain)
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if err != nil {
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return fmt.Errorf("namesilo: %v", err)
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}
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resp, err := d.client.DnsListRecords(&namesilo.DnsListRecordsParams{Domain: zoneName})
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if err != nil {
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return fmt.Errorf("namesilo: %v", err)
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}
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var lastErr error
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name := getRecordName(fqdn, zoneName)
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for _, r := range resp.Reply.ResourceRecord {
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if r.Type == "TXT" && r.Host == name {
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_, err := d.client.DnsDeleteRecord(&namesilo.DnsDeleteRecordParams{Domain: zoneName, ID: r.RecordID})
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if err != nil {
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lastErr = fmt.Errorf("namesilo: %v", err)
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}
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}
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}
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return lastErr
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}
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// Timeout returns the timeout and interval to use when checking for DNS propagation.
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// Adjusting here to cope with spikes in propagation times.
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func (d *DNSProvider) Timeout() (timeout, interval time.Duration) {
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return d.config.PropagationTimeout, d.config.PollingInterval
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}
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func getZoneNameByDomain(domain string) (string, error) {
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zone, err := dns01.FindZoneByFqdn(dns01.ToFqdn(domain))
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if err != nil {
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return "", fmt.Errorf("failed to find zone for domain: %s, %v", domain, err)
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}
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return dns01.UnFqdn(zone), nil
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}
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func getRecordName(domain, zone string) string {
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return strings.TrimSuffix(dns01.ToFqdn(domain), "."+dns01.ToFqdn(zone))
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}
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