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lego/providers/dns/hyperone/hyperone.go
2020-09-02 20:38:01 +02:00

204 lines
6.1 KiB
Go

// Package hyperone implements a DNS provider for solving the DNS-01 challenge using HyperOne.
package hyperone
import (
"fmt"
"net/http"
"os"
"path/filepath"
"time"
"github.com/go-acme/lego/v4/challenge/dns01"
"github.com/go-acme/lego/v4/platform/config/env"
"github.com/go-acme/lego/v4/providers/dns/hyperone/internal"
)
// Environment variables names.
const (
envNamespace = "HYPERONE_"
EnvPassportLocation = envNamespace + "PASSPORT_LOCATION"
EnvAPIUrl = envNamespace + "API_URL"
EnvLocationID = envNamespace + "LOCATION_ID"
EnvTTL = envNamespace + "TTL"
EnvPropagationTimeout = envNamespace + "PROPAGATION_TIMEOUT"
EnvPollingInterval = envNamespace + "POLLING_INTERVAL"
EnvHTTPTimeout = envNamespace + "HTTP_TIMEOUT"
)
// Config is used to configure the creation of the DNSProvider.
type Config struct {
APIEndpoint string
LocationID string
PassportLocation string
TTL int
PropagationTimeout time.Duration
PollingInterval time.Duration
HTTPClient *http.Client
}
// NewDefaultConfig returns a default configuration for the DNSProvider.
func NewDefaultConfig() *Config {
return &Config{
TTL: env.GetOrDefaultInt(EnvTTL, dns01.DefaultTTL),
PropagationTimeout: env.GetOrDefaultSecond(EnvPropagationTimeout, dns01.DefaultPropagationTimeout),
PollingInterval: env.GetOrDefaultSecond(EnvPollingInterval, dns01.DefaultPollingInterval),
HTTPClient: &http.Client{
Timeout: env.GetOrDefaultSecond(EnvHTTPTimeout, 30*time.Second),
},
}
}
// DNSProvider implements the challenge.Provider interface.
type DNSProvider struct {
client *internal.Client
config *Config
}
// NewDNSProvider returns a DNSProvider instance configured for HyperOne.
func NewDNSProvider() (*DNSProvider, error) {
config := NewDefaultConfig()
config.PassportLocation = env.GetOrFile(EnvPassportLocation)
config.LocationID = env.GetOrFile(EnvLocationID)
config.APIEndpoint = env.GetOrFile(EnvAPIUrl)
return NewDNSProviderConfig(config)
}
// NewDNSProviderConfig return a DNSProvider instance configured for HyperOne.
func NewDNSProviderConfig(config *Config) (*DNSProvider, error) {
if config.PassportLocation == "" {
var err error
config.PassportLocation, err = GetDefaultPassportLocation()
if err != nil {
return nil, fmt.Errorf("hyperone: %w", err)
}
}
passport, err := internal.LoadPassportFile(config.PassportLocation)
if err != nil {
return nil, fmt.Errorf("hyperone: %w", err)
}
client, err := internal.NewClient(config.APIEndpoint, config.LocationID, passport)
if err != nil {
return nil, fmt.Errorf("hyperone: failed to create client: %w", err)
}
if config.HTTPClient != nil {
client.HTTPClient = config.HTTPClient
}
return &DNSProvider{client: client, config: config}, nil
}
// Timeout returns the timeout and interval to use when checking for DNS propagation.
// Adjusting here to cope with spikes in propagation times.
func (d *DNSProvider) Timeout() (timeout, interval time.Duration) {
return d.config.PropagationTimeout, d.config.PollingInterval
}
// Present creates a TXT record to fulfill the dns-01 challenge.
func (d *DNSProvider) Present(domain, token, keyAuth string) error {
fqdn, value := dns01.GetRecord(domain, keyAuth)
zone, err := d.getHostedZone(fqdn)
if err != nil {
return fmt.Errorf("hyperone: failed to get zone for fqdn=%s: %w", fqdn, err)
}
recordset, err := d.client.FindRecordset(zone.ID, "TXT", fqdn)
if err != nil {
return fmt.Errorf("hyperone: fqdn=%s, zone ID=%s: %w", fqdn, zone.ID, err)
}
if recordset == nil {
_, err = d.client.CreateRecordset(zone.ID, "TXT", fqdn, value, d.config.TTL)
if err != nil {
return fmt.Errorf("hyperone: failed to create recordset: fqdn=%s, zone ID=%s, value=%s: %w", fqdn, zone.ID, value, err)
}
return nil
}
_, err = d.client.CreateRecord(zone.ID, recordset.ID, value)
if err != nil {
return fmt.Errorf("hyperone: failed to create record: fqdn=%s, zone ID=%s, recordset ID=%s: %w", fqdn, zone.ID, recordset.ID, err)
}
return nil
}
// CleanUp removes the TXT record matching the specified parameters and recordset if no other records are remaining.
// There is a small possibility that race will cause to delete recordset with records for other DNS Challenges.
func (d *DNSProvider) CleanUp(domain, _, keyAuth string) error {
fqdn, value := dns01.GetRecord(domain, keyAuth)
zone, err := d.getHostedZone(fqdn)
if err != nil {
return fmt.Errorf("hyperone: failed to get zone for fqdn=%s: %w", fqdn, err)
}
recordset, err := d.client.FindRecordset(zone.ID, "TXT", fqdn)
if err != nil {
return fmt.Errorf("hyperone: fqdn=%s, zone ID=%s: %w", fqdn, zone.ID, err)
}
if recordset == nil {
return fmt.Errorf("hyperone: recordset to remove not found: fqdn=%s", fqdn)
}
records, err := d.client.GetRecords(zone.ID, recordset.ID)
if err != nil {
return fmt.Errorf("hyperone: %w", err)
}
if len(records) == 1 {
if records[0].Content != value {
return fmt.Errorf("hyperone: record with content %s not found: fqdn=%s", value, fqdn)
}
err = d.client.DeleteRecordset(zone.ID, recordset.ID)
if err != nil {
return fmt.Errorf("hyperone: failed to delete record: fqdn=%s, zone ID=%s, recordset ID=%s: %w", fqdn, zone.ID, recordset.ID, err)
}
return nil
}
for _, record := range records {
if record.Content == value {
err = d.client.DeleteRecord(zone.ID, recordset.ID, record.ID)
if err != nil {
return fmt.Errorf("hyperone: fqdn=%s, zone ID=%s, recordset ID=%s, record ID=%s: %w", fqdn, zone.ID, recordset.ID, record.ID, err)
}
return nil
}
}
return fmt.Errorf("hyperone: fqdn=%s, failed to find record with given value", fqdn)
}
// getHostedZone gets the hosted zone.
func (d *DNSProvider) getHostedZone(fqdn string) (*internal.Zone, error) {
authZone, err := dns01.FindZoneByFqdn(fqdn)
if err != nil {
return nil, err
}
return d.client.FindZone(authZone)
}
func GetDefaultPassportLocation() (string, error) {
homeDir, err := os.UserHomeDir()
if err != nil {
return "", fmt.Errorf("failed to get user home directory: %w", err)
}
return filepath.Join(homeDir, ".h1", "passport.json"), nil
}