229 lines
6.2 KiB
Go
229 lines
6.2 KiB
Go
// Package dnsimple implements a DNS provider for solving the DNS-01 challenge using dnsimple DNS.
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package dnsimple
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import (
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"context"
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"errors"
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"fmt"
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"strconv"
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"strings"
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"time"
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"github.com/dnsimple/dnsimple-go/dnsimple"
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"github.com/go-acme/lego/v4/challenge/dns01"
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"github.com/go-acme/lego/v4/platform/config/env"
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"golang.org/x/oauth2"
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)
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// Environment variables names.
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const (
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envNamespace = "DNSIMPLE_"
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EnvOAuthToken = envNamespace + "OAUTH_TOKEN"
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EnvBaseURL = envNamespace + "BASE_URL"
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EnvDebug = envNamespace + "DEBUG"
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EnvTTL = envNamespace + "TTL"
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EnvPropagationTimeout = envNamespace + "PROPAGATION_TIMEOUT"
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EnvPollingInterval = envNamespace + "POLLING_INTERVAL"
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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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Debug bool
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AccessToken string
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BaseURL 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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TTL: env.GetOrDefaultInt(EnvTTL, dns01.DefaultTTL),
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Debug: env.GetOrDefaultBool(EnvDebug, false),
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PropagationTimeout: env.GetOrDefaultSecond(EnvPropagationTimeout, dns01.DefaultPropagationTimeout),
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PollingInterval: env.GetOrDefaultSecond(EnvPollingInterval, dns01.DefaultPollingInterval),
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}
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}
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// DNSProvider implements the challenge.Provider interface.
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type DNSProvider struct {
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config *Config
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client *dnsimple.Client
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}
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// NewDNSProvider returns a DNSProvider instance configured for dnsimple.
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// Credentials must be passed in the environment variable: DNSIMPLE_OAUTH_TOKEN.
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//
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// See: https://developer.dnsimple.com/v2/#authentication
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func NewDNSProvider() (*DNSProvider, error) {
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config := NewDefaultConfig()
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config.AccessToken = env.GetOrFile(EnvOAuthToken)
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config.BaseURL = env.GetOrFile(EnvBaseURL)
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return NewDNSProviderConfig(config)
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}
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// NewDNSProviderConfig return a DNSProvider instance configured for DNSimple.
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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("dnsimple: the configuration of the DNS provider is nil")
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}
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if config.AccessToken == "" {
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return nil, errors.New("dnsimple: OAuth token is missing")
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}
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ts := oauth2.StaticTokenSource(&oauth2.Token{AccessToken: config.AccessToken})
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client := dnsimple.NewClient(oauth2.NewClient(context.Background(), ts))
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client.SetUserAgent("go-acme/lego")
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if config.BaseURL != "" {
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client.BaseURL = config.BaseURL
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}
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client.Debug = config.Debug
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return &DNSProvider{client: 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 := d.getHostedZone(fqdn)
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if err != nil {
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return fmt.Errorf("dnsimple: %w", err)
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}
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accountID, err := d.getAccountID()
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if err != nil {
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return fmt.Errorf("dnsimple: %w", err)
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}
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recordAttributes := newTxtRecord(zoneName, fqdn, value, d.config.TTL)
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_, err = d.client.Zones.CreateRecord(context.Background(), accountID, zoneName, recordAttributes)
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if err != nil {
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return fmt.Errorf("dnsimple: API call failed: %w", 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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records, err := d.findTxtRecords(fqdn)
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if err != nil {
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return fmt.Errorf("dnsimple: %w", err)
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}
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accountID, err := d.getAccountID()
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if err != nil {
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return fmt.Errorf("dnsimple: %w", err)
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}
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var lastErr error
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for _, rec := range records {
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_, err := d.client.Zones.DeleteRecord(context.Background(), accountID, rec.ZoneID, rec.ID)
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if err != nil {
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lastErr = fmt.Errorf("dnsimple: %w", err)
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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 (d *DNSProvider) getHostedZone(domain string) (string, error) {
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authZone, err := dns01.FindZoneByFqdn(domain)
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if err != nil {
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return "", err
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}
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accountID, err := d.getAccountID()
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if err != nil {
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return "", err
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}
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zoneName := dns01.UnFqdn(authZone)
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zones, err := d.client.Zones.ListZones(context.Background(), accountID, &dnsimple.ZoneListOptions{NameLike: &zoneName})
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if err != nil {
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return "", fmt.Errorf("API call failed: %w", err)
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}
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var hostedZone dnsimple.Zone
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for _, zone := range zones.Data {
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if zone.Name == zoneName {
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hostedZone = zone
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}
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}
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if hostedZone.ID == 0 {
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return "", fmt.Errorf("zone %s not found in DNSimple for domain %s", authZone, domain)
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}
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return hostedZone.Name, nil
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}
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func (d *DNSProvider) findTxtRecords(fqdn string) ([]dnsimple.ZoneRecord, error) {
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zoneName, err := d.getHostedZone(fqdn)
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if err != nil {
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return nil, err
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}
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accountID, err := d.getAccountID()
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if err != nil {
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return nil, err
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}
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recordName := extractRecordName(fqdn, zoneName)
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result, err := d.client.Zones.ListRecords(context.Background(), accountID, zoneName, &dnsimple.ZoneRecordListOptions{Name: &recordName, Type: dnsimple.String("TXT"), ListOptions: dnsimple.ListOptions{}})
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if err != nil {
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return nil, fmt.Errorf("API call has failed: %w", err)
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}
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return result.Data, nil
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}
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func newTxtRecord(zoneName, fqdn, value string, ttl int) dnsimple.ZoneRecordAttributes {
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name := extractRecordName(fqdn, zoneName)
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return dnsimple.ZoneRecordAttributes{
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Type: "TXT",
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Name: &name,
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Content: value,
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TTL: ttl,
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}
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}
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func extractRecordName(fqdn, zone string) string {
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name := dns01.UnFqdn(fqdn)
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if idx := strings.Index(name, "."+zone); idx != -1 {
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return name[:idx]
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}
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return name
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}
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func (d *DNSProvider) getAccountID() (string, error) {
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whoamiResponse, err := d.client.Identity.Whoami(context.Background())
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if err != nil {
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return "", err
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}
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if whoamiResponse.Data.Account == nil {
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return "", errors.New("user tokens are not supported, please use an account token")
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}
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return strconv.FormatInt(whoamiResponse.Data.Account.ID, 10), nil
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}
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