forked from TrueCloudLab/lego
143 lines
4 KiB
Go
143 lines
4 KiB
Go
// Package iijdpf implements a DNS provider for solving the DNS-01 challenge using IIJ DNS Platform Service.
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package iijdpf
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import (
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"context"
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"errors"
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"fmt"
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"time"
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"github.com/go-acme/lego/v4/challenge"
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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/miekg/dns"
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dpfapi "github.com/mimuret/golang-iij-dpf/pkg/api"
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dpfapiutils "github.com/mimuret/golang-iij-dpf/pkg/apiutils"
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)
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// Environment variables names.
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const (
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envNamespace = "IIJ_DPF_"
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EnvAPIToken = envNamespace + "API_TOKEN"
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EnvServiceCode = envNamespace + "DPM_SERVICE_CODE"
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EnvAPIEndpoint = envNamespace + "API_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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)
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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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Token string
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ServiceCode string
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Endpoint 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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}
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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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Endpoint: env.GetOrDefaultString(EnvAPIEndpoint, dpfapi.DefaultEndpoint),
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PropagationTimeout: env.GetOrDefaultSecond(EnvPropagationTimeout, 660*time.Second),
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PollingInterval: env.GetOrDefaultSecond(EnvPollingInterval, 5*time.Second),
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TTL: env.GetOrDefaultInt(EnvTTL, 300),
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}
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}
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var _ challenge.Provider = &DNSProvider{}
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// DNSProvider implements the challenge.Provider interface.
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type DNSProvider struct {
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client dpfapi.ClientInterface
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config *Config
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}
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// NewDNSProvider returns a DNSProvider instance configured for IIJ DNS.
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func NewDNSProvider() (*DNSProvider, error) {
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values, err := env.Get(EnvAPIToken, EnvServiceCode)
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if err != nil {
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return nil, fmt.Errorf("iijdpf: %w", err)
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}
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config := NewDefaultConfig()
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config.Token = values[EnvAPIToken]
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config.ServiceCode = values[EnvServiceCode]
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return NewDNSProviderConfig(config)
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}
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// NewDNSProviderConfig takes a given config
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// and returns a custom configured DNSProvider instance.
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func NewDNSProviderConfig(config *Config) (*DNSProvider, error) {
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if config.Token == "" {
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return nil, errors.New("iijdpf: API token missing")
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}
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if config.ServiceCode == "" {
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return nil, errors.New("iijdpf: Servicecode missing")
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}
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return &DNSProvider{
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client: dpfapi.NewClient(config.Token, config.Endpoint, nil),
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config: config,
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}, 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 using the specified parameters.
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func (d *DNSProvider) Present(domain, token, keyAuth string) error {
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ctx := context.Background()
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fqdn, value := dns01.GetRecord(domain, keyAuth)
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zoneID, err := dpfapiutils.GetZoneIdFromServiceCode(ctx, d.client, d.config.ServiceCode)
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if err != nil {
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return fmt.Errorf("iijdpf: failed to get zone id: %w", err)
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}
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err = d.addTxtRecord(ctx, zoneID, dns.CanonicalName(fqdn), `"`+value+`"`)
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if err != nil {
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return fmt.Errorf("iijdpf: %w", err)
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}
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err = d.commit(ctx, zoneID)
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if err != nil {
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return fmt.Errorf("iijdpf: %w", 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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fqdn, value := dns01.GetRecord(domain, keyAuth)
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zoneID, err := dpfapiutils.GetZoneIdFromServiceCode(ctx, d.client, d.config.ServiceCode)
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if err != nil {
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return fmt.Errorf("iijdpf: failed to get zone id: %w", err)
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}
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err = d.deleteTxtRecord(ctx, zoneID, dns.CanonicalName(fqdn), `"`+value+`"`)
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if err != nil {
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return fmt.Errorf("iijdpf: %w", err)
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}
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err = d.commit(ctx, zoneID)
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if err != nil {
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return fmt.Errorf("iijdpf: %w", err)
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}
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return nil
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}
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