140 lines
4 KiB
Go
140 lines
4 KiB
Go
// Package mydnsjp implements a DNS provider for solving the DNS-01
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// challenge using MyDNS.jp.
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package mydnsjp
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import (
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"errors"
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"fmt"
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"io/ioutil"
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"net/http"
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"net/url"
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"strings"
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"time"
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"github.com/xenolf/lego/acme"
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"github.com/xenolf/lego/platform/config/env"
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)
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const defaultBaseURL = "https://www.mydns.jp/directedit.html"
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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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MasterID 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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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("MYDNSJP_PROPAGATION_TIMEOUT", 2*time.Minute),
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PollingInterval: env.GetOrDefaultSecond("MYDNSJP_POLLING_INTERVAL", 2*time.Second),
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HTTPClient: &http.Client{
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Timeout: env.GetOrDefaultSecond("MYDNSJP_HTTP_TIMEOUT", 30*time.Second),
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},
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}
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}
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// DNSProvider is an implementation of the acme.ChallengeProvider interface
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type DNSProvider struct {
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config *Config
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}
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// NewDNSProvider returns a DNSProvider instance configured for MyDNS.jp.
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// Credentials must be passed in the environment variables: MYDNSJP_MASTER_ID and MYDNSJP_PASSWORD.
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func NewDNSProvider() (*DNSProvider, error) {
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values, err := env.Get("MYDNSJP_MASTER_ID", "MYDNSJP_PASSWORD")
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if err != nil {
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return nil, fmt.Errorf("mydnsjp: %v", err)
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}
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config := NewDefaultConfig()
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config.MasterID = values["MYDNSJP_MASTER_ID"]
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config.Password = values["MYDNSJP_PASSWORD"]
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return NewDNSProviderConfig(config)
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}
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// NewDNSProviderConfig return a DNSProvider instance configured for MyDNS.jp.
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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("mydnsjp: the configuration of the DNS provider is nil")
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}
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if config.MasterID == "" || config.Password == "" {
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return nil, errors.New("mydnsjp: some credentials information are missing")
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}
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return &DNSProvider{config: config}, 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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_, value, _ := acme.DNS01Record(domain, keyAuth)
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err := d.doRequest(domain, value, "REGIST")
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if err != nil {
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return fmt.Errorf("mydnsjp: %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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_, value, _ := acme.DNS01Record(domain, keyAuth)
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err := d.doRequest(domain, value, "DELETE")
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if err != nil {
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return fmt.Errorf("mydnsjp: %v", err)
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}
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return nil
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}
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func (d *DNSProvider) doRequest(domain, value string, cmd string) error {
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req, err := d.buildRequest(domain, value, cmd)
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if err != nil {
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return err
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}
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resp, err := d.config.HTTPClient.Do(req)
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if err != nil {
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return fmt.Errorf("error querying API: %v", err)
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}
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defer resp.Body.Close()
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if resp.StatusCode >= 400 {
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var content []byte
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content, err = ioutil.ReadAll(resp.Body)
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if err != nil {
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return err
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}
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return fmt.Errorf("request %s failed [status code %d]: %s", req.URL, resp.StatusCode, string(content))
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}
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return nil
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}
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func (d *DNSProvider) buildRequest(domain, value string, cmd string) (*http.Request, error) {
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params := url.Values{}
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params.Set("CERTBOT_DOMAIN", domain)
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params.Set("CERTBOT_VALIDATION", value)
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params.Set("EDIT_CMD", cmd)
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req, err := http.NewRequest(http.MethodPost, defaultBaseURL, strings.NewReader(params.Encode()))
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if err != nil {
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return nil, fmt.Errorf("invalid request: %v", err)
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}
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req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
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req.SetBasicAuth(d.config.MasterID, d.config.Password)
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return req, nil
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}
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