mirror of
https://github.com/go-acme/lego.git
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278 lines
8.2 KiB
Go
278 lines
8.2 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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"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/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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// Create a OAuth2 client: https://eu.api.ovh.com/console/?section=%2Fme&branch=v1#post-/me/api/oauth2/client
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// Environment variables names.
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const (
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envNamespace = "OVH_"
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EnvEndpoint = envNamespace + "ENDPOINT"
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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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// Authenticate using application key.
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const (
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EnvApplicationKey = envNamespace + "APPLICATION_KEY"
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EnvApplicationSecret = envNamespace + "APPLICATION_SECRET"
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EnvConsumerKey = envNamespace + "CONSUMER_KEY"
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)
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// Authenticate using OAuth2 client.
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const (
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EnvClientID = envNamespace + "CLIENT_ID"
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EnvClientSecret = envNamespace + "CLIENT_SECRET"
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)
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// EnvAccessToken Authenticate using Access Token client.
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const EnvAccessToken = envNamespace + "ACCESS_TOKEN"
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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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// OAuth2Config the OAuth2 specific configuration.
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type OAuth2Config struct {
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ClientID string
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ClientSecret string
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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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OAuth2Config *OAuth2Config
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AccessToken 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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func (c *Config) hasAppKeyAuth() bool {
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return c.ApplicationKey != "" || c.ApplicationSecret != "" || c.ConsumerKey != ""
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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, dns01.DefaultPropagationTimeout),
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PollingInterval: env.GetOrDefaultSecond(EnvPollingInterval, dns01.DefaultPollingInterval),
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HTTPClient: &http.Client{
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Timeout: env.GetOrDefaultSecond(EnvHTTPTimeout, ovh.DefaultTimeout),
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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 *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 variables:
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// OVH_ENDPOINT (must be either "ovh-eu" or "ovh-ca"), OVH_APPLICATION_KEY, OVH_APPLICATION_SECRET, OVH_CONSUMER_KEY.
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func NewDNSProvider() (*DNSProvider, error) {
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config := NewDefaultConfig()
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// https://github.com/ovh/go-ovh/blob/6817886d12a8c5650794b28da635af9fcdfd1162/ovh/configuration.go#L105
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config.APIEndpoint = env.GetOrDefaultString(EnvEndpoint, "ovh-eu")
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config.ApplicationKey = env.GetOrFile(EnvApplicationKey)
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config.ApplicationSecret = env.GetOrFile(EnvApplicationSecret)
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config.ConsumerKey = env.GetOrFile(EnvConsumerKey)
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config.AccessToken = env.GetOrFile(EnvAccessToken)
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clientID := env.GetOrFile(EnvClientID)
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clientSecret := env.GetOrFile(EnvClientSecret)
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if clientID != "" || clientSecret != "" {
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config.OAuth2Config = &OAuth2Config{
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ClientID: clientID,
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ClientSecret: clientSecret,
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}
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}
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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.OAuth2Config != nil && config.hasAppKeyAuth() && config.AccessToken != "" {
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return nil, errors.New("ovh: can't use multiple authentication systems (ApplicationKey, OAuth2, Access Token)")
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}
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if config.OAuth2Config != nil && config.AccessToken != "" {
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return nil, errors.New("ovh: can't use multiple authentication systems (OAuth2, Access Token)")
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}
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if config.OAuth2Config != nil && config.hasAppKeyAuth() {
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return nil, errors.New("ovh: can't use multiple authentication systems (ApplicationKey, OAuth2)")
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}
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if config.hasAppKeyAuth() && config.AccessToken != "" {
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return nil, errors.New("ovh: can't use multiple authentication systems (ApplicationKey, Access Token)")
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}
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client, err := newClient(config)
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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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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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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("ovh: could not find zone for domain %q: %w", domain, err)
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}
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authZone = dns01.UnFqdn(authZone)
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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("ovh: %w", err)
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}
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reqURL := fmt.Sprintf("/domain/zone/%s/record", authZone)
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reqData := Record{FieldType: "TXT", SubDomain: subDomain, Target: info.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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info := dns01.GetChallengeInfo(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'", info.EffectiveFQDN)
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}
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authZone, err := dns01.FindZoneByFqdn(info.EffectiveFQDN)
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if err != nil {
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return fmt.Errorf("ovh: could not find 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 newClient(config *Config) (*ovh.Client, error) {
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var client *ovh.Client
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var err error
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switch {
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case config.hasAppKeyAuth():
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client, err = ovh.NewClient(config.APIEndpoint, config.ApplicationKey, config.ApplicationSecret, config.ConsumerKey)
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case config.OAuth2Config != nil:
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client, err = ovh.NewOAuth2Client(config.APIEndpoint, config.OAuth2Config.ClientID, config.OAuth2Config.ClientSecret)
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case config.AccessToken != "":
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client, err = ovh.NewAccessTokenClient(config.APIEndpoint, config.AccessToken)
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default:
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client, err = ovh.NewDefaultClient()
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}
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if err != nil {
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return nil, fmt.Errorf("new client: %w", err)
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}
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client.UserAgent = "go-acme/lego"
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return client, nil
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}
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