203 lines
6 KiB
Go
203 lines
6 KiB
Go
// Package ovh implements a DNS provider for solving the DNS-01 challenge using OVH DNS.
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package ovh
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import (
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"errors"
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"fmt"
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"net/http"
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"strings"
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"sync"
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"time"
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"github.com/go-acme/lego/v3/challenge/dns01"
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"github.com/go-acme/lego/v3/platform/config/env"
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"github.com/ovh/go-ovh/ovh"
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)
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// OVH API reference: https://eu.api.ovh.com/
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// Create a Token: https://eu.api.ovh.com/createToken/
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// Record a DNS record
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type Record struct {
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ID int64 `json:"id,omitempty"`
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FieldType string `json:"fieldType,omitempty"`
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SubDomain string `json:"subDomain,omitempty"`
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Target string `json:"target,omitempty"`
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TTL int `json:"ttl,omitempty"`
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Zone string `json:"zone,omitempty"`
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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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APIEndpoint string
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ApplicationKey string
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ApplicationSecret string
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ConsumerKey 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("OVH_TTL", dns01.DefaultTTL),
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PropagationTimeout: env.GetOrDefaultSecond("OVH_PROPAGATION_TIMEOUT", dns01.DefaultPropagationTimeout),
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PollingInterval: env.GetOrDefaultSecond("OVH_POLLING_INTERVAL", dns01.DefaultPollingInterval),
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HTTPClient: &http.Client{
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Timeout: env.GetOrDefaultSecond("OVH_HTTP_TIMEOUT", ovh.DefaultTimeout),
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},
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}
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}
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// DNSProvider is an implementation of the challenge.Provider interface
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// that uses OVH's REST API to manage TXT records for a domain.
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type DNSProvider struct {
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config *Config
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client *ovh.Client
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recordIDs map[string]int64
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recordIDsMu sync.Mutex
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}
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// NewDNSProvider returns a DNSProvider instance configured for OVH
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// Credentials must be passed in the environment variable:
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// OVH_ENDPOINT : it must be ovh-eu or ovh-ca
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// OVH_APPLICATION_KEY
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// OVH_APPLICATION_SECRET
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// OVH_CONSUMER_KEY
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func NewDNSProvider() (*DNSProvider, error) {
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values, err := env.Get("OVH_ENDPOINT", "OVH_APPLICATION_KEY", "OVH_APPLICATION_SECRET", "OVH_CONSUMER_KEY")
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if err != nil {
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return nil, fmt.Errorf("ovh: %w", err)
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}
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config := NewDefaultConfig()
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config.APIEndpoint = values["OVH_ENDPOINT"]
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config.ApplicationKey = values["OVH_APPLICATION_KEY"]
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config.ApplicationSecret = values["OVH_APPLICATION_SECRET"]
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config.ConsumerKey = values["OVH_CONSUMER_KEY"]
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return NewDNSProviderConfig(config)
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}
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// NewDNSProviderConfig return a DNSProvider instance configured for OVH.
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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("ovh: the configuration of the DNS provider is nil")
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}
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if config.APIEndpoint == "" || config.ApplicationKey == "" || config.ApplicationSecret == "" || config.ConsumerKey == "" {
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return nil, errors.New("ovh: credentials missing")
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}
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client, err := ovh.NewClient(
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config.APIEndpoint,
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config.ApplicationKey,
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config.ApplicationSecret,
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config.ConsumerKey,
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)
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if err != nil {
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return nil, fmt.Errorf("ovh: %w", err)
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}
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client.Client = config.HTTPClient
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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]int64),
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}, 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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// Parse domain name
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authZone, err := dns01.FindZoneByFqdn(dns01.ToFqdn(domain))
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if err != nil {
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return fmt.Errorf("ovh: could not determine zone for domain %q: %w", domain, err)
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}
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authZone = dns01.UnFqdn(authZone)
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subDomain := d.extractRecordName(fqdn, authZone)
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reqURL := fmt.Sprintf("/domain/zone/%s/record", authZone)
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reqData := Record{FieldType: "TXT", SubDomain: subDomain, Target: value, TTL: d.config.TTL}
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// Create TXT record
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var respData Record
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err = d.client.Post(reqURL, reqData, &respData)
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if err != nil {
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return fmt.Errorf("ovh: error when call api to add record (%s): %w", reqURL, err)
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}
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// Apply the change
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reqURL = fmt.Sprintf("/domain/zone/%s/refresh", authZone)
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err = d.client.Post(reqURL, nil, nil)
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if err != nil {
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return fmt.Errorf("ovh: error when call api to refresh zone (%s): %w", reqURL, err)
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}
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d.recordIDsMu.Lock()
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d.recordIDs[token] = respData.ID
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d.recordIDsMu.Unlock()
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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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// get the record's unique ID from when we created it
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d.recordIDsMu.Lock()
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recordID, ok := d.recordIDs[token]
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d.recordIDsMu.Unlock()
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if !ok {
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return fmt.Errorf("ovh: unknown record ID for '%s'", fqdn)
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}
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authZone, err := dns01.FindZoneByFqdn(dns01.ToFqdn(domain))
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if err != nil {
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return fmt.Errorf("ovh: could not determine zone for domain %q: %w", domain, err)
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}
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authZone = dns01.UnFqdn(authZone)
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reqURL := fmt.Sprintf("/domain/zone/%s/record/%d", authZone, recordID)
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err = d.client.Delete(reqURL, nil)
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if err != nil {
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return fmt.Errorf("ovh: error when call OVH api to delete challenge record (%s): %w", reqURL, err)
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}
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// Apply the change
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reqURL = fmt.Sprintf("/domain/zone/%s/refresh", authZone)
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err = d.client.Post(reqURL, nil, nil)
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if err != nil {
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return fmt.Errorf("ovh: error when call api to refresh zone (%s): %w", reqURL, err)
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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, token)
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d.recordIDsMu.Unlock()
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return 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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func (d *DNSProvider) extractRecordName(fqdn, domain string) string {
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name := dns01.UnFqdn(fqdn)
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if idx := strings.Index(name, "."+domain); 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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