131 lines
3.7 KiB
Go
131 lines
3.7 KiB
Go
// Package mailinabox implements a DNS provider for solving the DNS-01 challenge using Mail-in-a-Box.
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package mailinabox
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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/dns01"
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"github.com/go-acme/lego/v4/platform/config/env"
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"github.com/nrdcg/mailinabox"
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)
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// Environment variables names.
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const (
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envNamespace = "MAILINABOX_"
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EnvEmail = envNamespace + "EMAIL"
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EnvPassword = envNamespace + "PASSWORD"
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EnvBaseURL = envNamespace + "BASE_URL"
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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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Email string
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Password string
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BaseURL string
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PropagationTimeout time.Duration
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PollingInterval time.Duration
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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(EnvPropagationTimeout, 120*time.Second),
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PollingInterval: env.GetOrDefaultSecond(EnvPollingInterval, 4*time.Second),
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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 *mailinabox.Client
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}
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// NewDNSProvider returns a DNSProvider instance configured for Mail-in-a-Box.
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// Credentials must be passed in the environment variables:
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// MAILINABOX_EMAIL, MAILINABOX_PASSWORD, and MAILINABOX_BASE_URL.
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func NewDNSProvider() (*DNSProvider, error) {
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values, err := env.Get(EnvBaseURL, EnvEmail, EnvPassword)
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if err != nil {
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return nil, fmt.Errorf("mailinabox: %w", err)
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}
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config := NewDefaultConfig()
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config.BaseURL = values[EnvBaseURL]
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config.Email = values[EnvEmail]
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config.Password = values[EnvPassword]
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return NewDNSProviderConfig(config)
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}
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// NewDNSProviderConfig return a DNSProvider instance configured for deSEC.
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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("mailinabox: the configuration of the DNS provider is nil")
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}
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if config.Email == "" || config.Password == "" {
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return nil, errors.New("mailinabox: incomplete credentials, missing email or password")
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}
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if config.BaseURL == "" {
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return nil, errors.New("mailinabox: missing base URL")
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}
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client, err := mailinabox.New(config.BaseURL, config.Email, config.Password)
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if err != nil {
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return nil, fmt.Errorf("mailinabox: %w", err)
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}
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return &DNSProvider{config: config, client: client}, 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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info := dns01.GetChallengeInfo(domain, keyAuth)
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record := mailinabox.Record{
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Name: dns01.UnFqdn(info.EffectiveFQDN),
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Type: "TXT",
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Value: info.Value,
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}
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_, err := d.client.DNS.AddRecord(ctx, record)
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if err != nil {
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return fmt.Errorf("mailinabox: add record: %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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info := dns01.GetChallengeInfo(domain, keyAuth)
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record := mailinabox.Record{
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Name: dns01.UnFqdn(info.EffectiveFQDN),
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Type: "TXT",
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Value: info.Value,
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}
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_, err := d.client.DNS.RemoveRecord(ctx, record)
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if err != nil {
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return fmt.Errorf("mailinabox: remove record: %w", err)
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}
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return nil
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}
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