154 lines
4.3 KiB
Go
154 lines
4.3 KiB
Go
// Package mythicbeasts implements a DNS provider for solving the DNS-01 challenge using Mythic Beasts API.
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package mythicbeasts
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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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"net/url"
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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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)
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// Environment variables names.
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const (
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envNamespace = "MYTHICBEASTS_"
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EnvUserName = envNamespace + "USERNAME"
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EnvPassword = envNamespace + "PASSWORD"
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EnvAPIEndpoint = envNamespace + "API_ENDPOINT"
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EnvAuthAPIEndpoint = envNamespace + "AUTH_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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EnvHTTPTimeout = envNamespace + "HTTP_TIMEOUT"
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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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UserName string
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Password string
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HTTPClient *http.Client
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PropagationTimeout time.Duration
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PollingInterval time.Duration
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APIEndpoint *url.URL
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AuthAPIEndpoint *url.URL
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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, error) {
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apiEndpoint, err := url.Parse(env.GetOrDefaultString(EnvAPIEndpoint, apiBaseURL))
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if err != nil {
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return nil, fmt.Errorf("mythicbeasts: Unable to parse API URL: %w", err)
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}
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authEndpoint, err := url.Parse(env.GetOrDefaultString(EnvAuthAPIEndpoint, authBaseURL))
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if err != nil {
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return nil, fmt.Errorf("mythicbeasts: Unable to parse AUTH API URL: %w", err)
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}
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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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APIEndpoint: apiEndpoint,
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AuthAPIEndpoint: authEndpoint,
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HTTPClient: &http.Client{
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Timeout: env.GetOrDefaultSecond(EnvHTTPTimeout, 10*time.Second),
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},
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}, nil
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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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token string
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}
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// NewDNSProvider returns a DNSProvider instance configured for mythicbeasts DNSv2 API.
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// Credentials must be passed in the environment variables:
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// MYTHICBEASTS_USER_NAME and MYTHICBEASTS_PASSWORD.
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func NewDNSProvider() (*DNSProvider, error) {
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values, err := env.Get(EnvUserName, EnvPassword)
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if err != nil {
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return nil, fmt.Errorf("mythicbeasts: %w", err)
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}
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config, err := NewDefaultConfig()
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if err != nil {
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return nil, fmt.Errorf("mythicbeasts: %w", err)
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}
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config.UserName = values[EnvUserName]
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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 mythicbeasts DNSv2 API.
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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("mythicbeasts: the configuration of the DNS provider is nil")
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}
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if config.UserName == "" || config.Password == "" {
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return nil, errors.New("mythicbeasts: incomplete credentials, missing username and/or password")
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}
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return &DNSProvider{config: config}, 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(domain, token, keyAuth string) error {
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fqdn, value := dns01.GetRecord(domain, keyAuth)
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authZone, err := dns01.FindZoneByFqdn(fqdn)
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if err != nil {
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return fmt.Errorf("mythicbeasts: %w", err)
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}
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leaf := fqdn[:len(fqdn)-(len(authZone)+1)]
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authZone = dns01.UnFqdn(authZone)
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err = d.login()
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if err != nil {
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return fmt.Errorf("mythicbeasts: %w", err)
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}
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err = d.createTXTRecord(authZone, leaf, value)
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if err != nil {
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return fmt.Errorf("mythicbeasts: %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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fqdn, value := dns01.GetRecord(domain, keyAuth)
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authZone, err := dns01.FindZoneByFqdn(fqdn)
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if err != nil {
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return fmt.Errorf("mythicbeasts: %w", err)
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}
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leaf := fqdn[:len(fqdn)-(len(authZone)+1)]
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authZone = dns01.UnFqdn(authZone)
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err = d.login()
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if err != nil {
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return fmt.Errorf("mythicbeasts: %w", err)
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}
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err = d.removeTXTRecord(authZone, leaf, value)
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if err != nil {
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return fmt.Errorf("mythicbeasts: %w", err)
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}
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return nil
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}
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