248 lines
6 KiB
Go
248 lines
6 KiB
Go
package dnsmadeeasy
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import (
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"bytes"
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"crypto/hmac"
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"crypto/sha1"
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"crypto/tls"
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"encoding/hex"
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"encoding/json"
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"fmt"
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"net/http"
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"os"
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"strconv"
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"strings"
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"time"
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"github.com/xenolf/lego/acme"
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)
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// DNSProvider is an implementation of the acme.ChallengeProvider interface that uses
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// DNSMadeEasy's DNS API to manage TXT records for a domain.
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type DNSProvider struct {
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baseURL string
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apiKey string
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apiSecret string
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}
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// Domain holds the DNSMadeEasy API representation of a Domain
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type Domain struct {
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ID int `json:"id"`
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Name string `json:"name"`
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}
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// Record holds the DNSMadeEasy API representation of a Domain Record
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type Record struct {
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ID int `json:"id"`
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Type string `json:"type"`
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Name string `json:"name"`
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Value string `json:"value"`
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TTL int `json:"ttl"`
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SourceID int `json:"sourceId"`
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}
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// NewDNSProvider returns a DNSProvider instance configured for DNSMadeEasy DNS.
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// Credentials must be passed in the environment variables: DNSMADEEASY_API_KEY
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// and DNSMADEEASY_API_SECRET.
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func NewDNSProvider() (*DNSProvider, error) {
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dnsmadeeasyAPIKey := os.Getenv("DNSMADEEASY_API_KEY")
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dnsmadeeasyAPISecret := os.Getenv("DNSMADEEASY_API_SECRET")
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dnsmadeeasySandbox := os.Getenv("DNSMADEEASY_SANDBOX")
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var baseURL string
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sandbox, _ := strconv.ParseBool(dnsmadeeasySandbox)
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if sandbox {
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baseURL = "https://api.sandbox.dnsmadeeasy.com/V2.0"
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} else {
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baseURL = "https://api.dnsmadeeasy.com/V2.0"
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}
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return NewDNSProviderCredentials(baseURL, dnsmadeeasyAPIKey, dnsmadeeasyAPISecret)
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}
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// NewDNSProviderCredentials uses the supplied credentials to return a
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// DNSProvider instance configured for DNSMadeEasy.
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func NewDNSProviderCredentials(baseURL, apiKey, apiSecret string) (*DNSProvider, error) {
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if baseURL == "" || apiKey == "" || apiSecret == "" {
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return nil, fmt.Errorf("DNS Made Easy credentials missing")
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}
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return &DNSProvider{
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baseURL: baseURL,
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apiKey: apiKey,
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apiSecret: apiSecret,
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}, nil
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}
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// Present creates a TXT record using the specified parameters
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func (d *DNSProvider) Present(domainName, token, keyAuth string) error {
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fqdn, value, ttl := acme.DNS01Record(domainName, keyAuth)
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authZone, err := acme.FindZoneByFqdn(fqdn, acme.RecursiveNameservers)
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if err != nil {
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return err
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}
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// fetch the domain details
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domain, err := d.getDomain(authZone)
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if err != nil {
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return err
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}
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// create the TXT record
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name := strings.Replace(fqdn, "."+authZone, "", 1)
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record := &Record{Type: "TXT", Name: name, Value: value, TTL: ttl}
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err = d.createRecord(domain, record)
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if err != nil {
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return err
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}
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return nil
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}
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// CleanUp removes the TXT records matching the specified parameters
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func (d *DNSProvider) CleanUp(domainName, token, keyAuth string) error {
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fqdn, _, _ := acme.DNS01Record(domainName, keyAuth)
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authZone, err := acme.FindZoneByFqdn(fqdn, acme.RecursiveNameservers)
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if err != nil {
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return err
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}
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// fetch the domain details
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domain, err := d.getDomain(authZone)
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if err != nil {
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return err
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}
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// find matching records
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name := strings.Replace(fqdn, "."+authZone, "", 1)
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records, err := d.getRecords(domain, name, "TXT")
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if err != nil {
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return err
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}
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// delete records
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for _, record := range *records {
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err = d.deleteRecord(record)
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if err != nil {
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return err
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}
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}
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return nil
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}
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func (d *DNSProvider) getDomain(authZone string) (*Domain, error) {
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domainName := authZone[0 : len(authZone)-1]
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resource := fmt.Sprintf("%s%s", "/dns/managed/name?domainname=", domainName)
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resp, err := d.sendRequest("GET", resource, nil)
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if err != nil {
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return nil, err
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}
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defer resp.Body.Close()
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domain := &Domain{}
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err = json.NewDecoder(resp.Body).Decode(&domain)
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if err != nil {
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return nil, err
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}
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return domain, nil
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}
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func (d *DNSProvider) getRecords(domain *Domain, recordName, recordType string) (*[]Record, error) {
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resource := fmt.Sprintf("%s/%d/%s%s%s%s", "/dns/managed", domain.ID, "records?recordName=", recordName, "&type=", recordType)
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resp, err := d.sendRequest("GET", resource, nil)
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if err != nil {
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return nil, err
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}
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defer resp.Body.Close()
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type recordsResponse struct {
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Records *[]Record `json:"data"`
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}
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records := &recordsResponse{}
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err = json.NewDecoder(resp.Body).Decode(&records)
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if err != nil {
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return nil, err
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}
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return records.Records, nil
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}
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func (d *DNSProvider) createRecord(domain *Domain, record *Record) error {
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url := fmt.Sprintf("%s/%d/%s", "/dns/managed", domain.ID, "records")
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resp, err := d.sendRequest("POST", url, record)
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if err != nil {
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return err
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}
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defer resp.Body.Close()
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return nil
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}
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func (d *DNSProvider) deleteRecord(record Record) error {
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resource := fmt.Sprintf("%s/%d/%s/%d", "/dns/managed", record.SourceID, "records", record.ID)
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resp, err := d.sendRequest("DELETE", resource, nil)
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if err != nil {
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return err
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}
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defer resp.Body.Close()
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return nil
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}
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func (d *DNSProvider) sendRequest(method, resource string, payload interface{}) (*http.Response, error) {
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url := fmt.Sprintf("%s%s", d.baseURL, resource)
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body, err := json.Marshal(payload)
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if err != nil {
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return nil, err
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}
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timestamp := time.Now().UTC().Format(time.RFC1123)
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signature := computeHMAC(timestamp, d.apiSecret)
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req, err := http.NewRequest(method, url, bytes.NewReader(body))
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if err != nil {
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return nil, err
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}
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req.Header.Set("x-dnsme-apiKey", d.apiKey)
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req.Header.Set("x-dnsme-requestDate", timestamp)
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req.Header.Set("x-dnsme-hmac", signature)
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req.Header.Set("accept", "application/json")
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req.Header.Set("content-type", "application/json")
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transport := &http.Transport{
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TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
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}
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client := &http.Client{
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Transport: transport,
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Timeout: time.Duration(10 * time.Second),
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}
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resp, err := client.Do(req)
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if err != nil {
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return nil, err
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}
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if resp.StatusCode > 299 {
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return nil, fmt.Errorf("DNSMadeEasy API request failed with HTTP status code %d", resp.StatusCode)
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}
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return resp, nil
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}
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func computeHMAC(message string, secret string) string {
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key := []byte(secret)
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h := hmac.New(sha1.New, key)
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h.Write([]byte(message))
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return hex.EncodeToString(h.Sum(nil))
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}
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