mirror of
https://github.com/go-acme/lego.git
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224 lines
5.8 KiB
Go
224 lines
5.8 KiB
Go
// Package httpnet implements a DNS provider for solving the DNS-01 challenge using http.net.
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package httpnet
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import (
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"context"
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"errors"
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"fmt"
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"net/http"
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"net/url"
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"sync"
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"time"
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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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"github.com/go-acme/lego/v4/providers/dns/internal/hostingde"
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)
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// Environment variables names.
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const (
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envNamespace = "HTTPNET_"
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EnvAPIKey = envNamespace + "API_KEY"
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EnvZoneName = envNamespace + "ZONE_NAME"
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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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EnvHTTPTimeout = envNamespace + "HTTP_TIMEOUT"
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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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ZoneName 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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HTTPClient *http.Client
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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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PropagationTimeout: env.GetOrDefaultSecond(EnvPropagationTimeout, 2*time.Minute),
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PollingInterval: env.GetOrDefaultSecond(EnvPollingInterval, 2*time.Second),
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HTTPClient: &http.Client{
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Timeout: env.GetOrDefaultSecond(EnvHTTPTimeout, 30*time.Second),
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},
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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 *hostingde.Client
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recordIDs map[string]string
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recordIDsMu sync.Mutex
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}
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// NewDNSProvider returns a DNSProvider instance configured for http.net.
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// Credentials must be passed in the environment variables:
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// HTTPNET_ZONE_NAME and HTTPNET_API_KEY.
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func NewDNSProvider() (*DNSProvider, error) {
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values, err := env.Get(EnvAPIKey)
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if err != nil {
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return nil, fmt.Errorf("httpnet: %w", err)
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}
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config := NewDefaultConfig()
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config.APIKey = values[EnvAPIKey]
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config.ZoneName = env.GetOrFile(EnvZoneName)
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return NewDNSProviderConfig(config)
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}
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// NewDNSProviderConfig return a DNSProvider instance configured for http.net.
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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("httpnet: the configuration of the DNS provider is nil")
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}
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if config.APIKey == "" {
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return nil, errors.New("httpnet: API key missing")
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}
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client := hostingde.NewClient(config.APIKey)
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client.BaseURL, _ = url.Parse(hostingde.DefaultHTTPNetBaseURL)
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return &DNSProvider{
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config: config,
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client: client,
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recordIDs: make(map[string]string),
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}, nil
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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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// 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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info := dns01.GetChallengeInfo(domain, keyAuth)
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zoneName, err := d.getZoneName(info.EffectiveFQDN)
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if err != nil {
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return fmt.Errorf("httpnet: could not find zone for domain %q: %w", domain, err)
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}
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ctx := context.Background()
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// get the ZoneConfig for that domain
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zonesFind := hostingde.ZoneConfigsFindRequest{
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Filter: hostingde.Filter{Field: "zoneName", Value: zoneName},
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Limit: 1,
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Page: 1,
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}
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zoneConfig, err := d.client.GetZone(ctx, zonesFind)
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if err != nil {
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return fmt.Errorf("httpnet: %w", err)
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}
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zoneConfig.Name = zoneName
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rec := []hostingde.DNSRecord{{
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Type: "TXT",
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Name: dns01.UnFqdn(info.EffectiveFQDN),
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Content: info.Value,
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TTL: d.config.TTL,
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}}
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req := hostingde.ZoneUpdateRequest{
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ZoneConfig: *zoneConfig,
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RecordsToAdd: rec,
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}
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response, err := d.client.UpdateZone(ctx, req)
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if err != nil {
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return fmt.Errorf("httpnet: %w", err)
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}
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for _, record := range response.Records {
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if record.Name == dns01.UnFqdn(info.EffectiveFQDN) && record.Content == fmt.Sprintf(`%q`, info.Value) {
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d.recordIDsMu.Lock()
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d.recordIDs[info.EffectiveFQDN] = record.ID
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d.recordIDsMu.Unlock()
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}
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}
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if d.recordIDs[info.EffectiveFQDN] == "" {
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return fmt.Errorf("httpnet: error getting ID of just created record, for domain %s", domain)
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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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info := dns01.GetChallengeInfo(domain, keyAuth)
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zoneName, err := d.getZoneName(info.EffectiveFQDN)
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if err != nil {
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return fmt.Errorf("httpnet: could not find zone for domain %q: %w", domain, err)
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}
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ctx := context.Background()
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// get the ZoneConfig for that domain
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zonesFind := hostingde.ZoneConfigsFindRequest{
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Filter: hostingde.Filter{Field: "zoneName", Value: zoneName},
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Limit: 1,
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Page: 1,
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}
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zoneConfig, err := d.client.GetZone(ctx, zonesFind)
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if err != nil {
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return fmt.Errorf("httpnet: %w", err)
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}
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zoneConfig.Name = zoneName
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rec := []hostingde.DNSRecord{{
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Type: "TXT",
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Name: dns01.UnFqdn(info.EffectiveFQDN),
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Content: `"` + info.Value + `"`,
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}}
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req := hostingde.ZoneUpdateRequest{
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ZoneConfig: *zoneConfig,
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RecordsToDelete: rec,
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}
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// Delete record ID from map
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d.recordIDsMu.Lock()
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delete(d.recordIDs, info.EffectiveFQDN)
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d.recordIDsMu.Unlock()
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_, err = d.client.UpdateZone(ctx, req)
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if err != nil {
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return fmt.Errorf("httpnet: %w", err)
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}
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return nil
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}
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func (d *DNSProvider) getZoneName(fqdn string) (string, error) {
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if d.config.ZoneName != "" {
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return d.config.ZoneName, nil
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}
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zoneName, err := dns01.FindZoneByFqdn(fqdn)
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if err != nil {
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return "", fmt.Errorf("could not find zone: %w", err)
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}
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if zoneName == "" {
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return "", errors.New("empty zone name")
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}
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return dns01.UnFqdn(zoneName), nil
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}
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