mirror of
https://github.com/go-acme/lego.git
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192 lines
5.2 KiB
Go
192 lines
5.2 KiB
Go
package wedos
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import (
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"context"
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"encoding/json"
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"errors"
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"fmt"
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"net/http"
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"strconv"
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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/wedos/internal"
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)
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// Environment variables names.
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const (
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envNamespace = "WEDOS_"
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EnvUsername = envNamespace + "USERNAME"
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EnvPassword = envNamespace + "WAPI_PASSWORD"
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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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const minTTL = 5 * 60 // 5 minutes
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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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Username string
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Password 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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PropagationTimeout: env.GetOrDefaultSecond(EnvPropagationTimeout, 10*time.Minute),
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PollingInterval: env.GetOrDefaultSecond(EnvPollingInterval, 10*time.Second),
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TTL: env.GetOrDefaultInt(EnvTTL, minTTL),
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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 *internal.Client
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}
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// NewDNSProvider returns a DNSProvider instance.
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func NewDNSProvider() (*DNSProvider, error) {
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values, err := env.Get(EnvUsername, EnvPassword)
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if err != nil {
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return nil, fmt.Errorf("wedos: %w", err)
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}
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config := NewDefaultConfig()
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config.Username = values[EnvUsername]
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config.Password = values[EnvPassword]
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return NewDNSProviderConfig(config)
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}
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// NewDNSProviderConfig return a DNSProvider.
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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("wedos: the configuration of the DNS provider is nil")
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}
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if config.Username == "" || config.Password == "" {
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return nil, errors.New("wedos: some credentials information are missing")
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}
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if config.TTL < minTTL {
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return nil, fmt.Errorf("wedos: invalid TTL, TTL (%d) must be greater than %d", config.TTL, minTTL)
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}
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client := internal.NewClient(config.Username, config.Password)
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if config.HTTPClient != nil {
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client.HTTPClient = config.HTTPClient
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}
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return &DNSProvider{config: config, client: client}, 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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ctx := context.Background()
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info := dns01.GetChallengeInfo(domain, keyAuth)
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authZone, err := dns01.FindZoneByFqdn(info.EffectiveFQDN)
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if err != nil {
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return fmt.Errorf("wedos: could not find zone for domain %q: %w", domain, err)
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}
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subDomain, err := dns01.ExtractSubDomain(info.EffectiveFQDN, authZone)
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if err != nil {
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return fmt.Errorf("wedos: %w", err)
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}
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record := internal.DNSRow{
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Name: subDomain,
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TTL: json.Number(strconv.Itoa(d.config.TTL)),
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Type: "TXT",
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Data: info.Value,
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}
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records, err := d.client.GetRecords(ctx, authZone)
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if err != nil {
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return fmt.Errorf("wedos: could not get records for domain %q: %w", domain, err)
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}
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for _, candidate := range records {
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if candidate.Type == "TXT" && candidate.Name == subDomain && candidate.Data == info.Value {
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record.ID = candidate.ID
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break
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}
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}
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err = d.client.AddRecord(ctx, authZone, record)
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if err != nil {
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return fmt.Errorf("wedos: could not add TXT record for domain %q: %w", domain, err)
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}
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err = d.client.Commit(ctx, authZone)
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if err != nil {
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return fmt.Errorf("wedos: could not commit TXT record for domain %q: %w", domain, 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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ctx := context.Background()
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info := dns01.GetChallengeInfo(domain, keyAuth)
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authZone, err := dns01.FindZoneByFqdn(info.EffectiveFQDN)
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if err != nil {
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return fmt.Errorf("wedos: could not find zone for domain %q: %w", domain, err)
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}
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subDomain, err := dns01.ExtractSubDomain(info.EffectiveFQDN, authZone)
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if err != nil {
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return fmt.Errorf("wedos: %w", err)
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}
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records, err := d.client.GetRecords(ctx, authZone)
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if err != nil {
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return fmt.Errorf("wedos: could not get records for domain %q: %w", domain, err)
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}
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for _, candidate := range records {
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if candidate.Type != "TXT" || candidate.Name != subDomain || candidate.Data != info.Value {
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continue
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}
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err = d.client.DeleteRecord(ctx, authZone, candidate.ID)
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if err != nil {
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return fmt.Errorf("wedos: could not remove TXT record for domain %q: %w", domain, err)
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}
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err = d.client.Commit(ctx, authZone)
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if err != nil {
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return fmt.Errorf("wedos: could not commit TXT record for domain %q: %w", domain, err)
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}
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return nil
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}
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return nil
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}
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