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versio.go
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versio.go
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// Package versio implements a DNS provider for solving the DNS-01 challenge using versio DNS.
package versio
import (
"errors"
"fmt"
"net/http"
"net/url"
"sync"
"time"
"github.com/go-acme/lego/challenge/dns01"
"github.com/go-acme/lego/platform/config/env"
)
// Config is used to configure the creation of the DNSProvider
type Config struct {
BaseURL *url.URL
TTL int
Username string
Password string
PropagationTimeout time.Duration
PollingInterval time.Duration
SequenceInterval time.Duration
HTTPClient *http.Client
}
// NewDefaultConfig returns a default configuration for the DNSProvider
func NewDefaultConfig() *Config {
baseURL, err := url.Parse(env.GetOrDefaultString("VERSIO_ENDPOINT", defaultBaseURL))
if err != nil {
baseURL, _ = url.Parse(defaultBaseURL)
}
return &Config{
BaseURL: baseURL,
TTL: env.GetOrDefaultInt("VERSIO_TTL", 300),
PropagationTimeout: env.GetOrDefaultSecond("VERSIO_PROPAGATION_TIMEOUT", 60*time.Second),
PollingInterval: env.GetOrDefaultSecond("VERSIO_POLLING_INTERVAL", 5*time.Second),
SequenceInterval: env.GetOrDefaultSecond("VERSIO_SEQUENCE_INTERVAL", dns01.DefaultPropagationTimeout),
HTTPClient: &http.Client{
Timeout: env.GetOrDefaultSecond("VERSIO_HTTP_TIMEOUT", 30*time.Second),
},
}
}
// DNSProvider describes a provider for acme-proxy
type DNSProvider struct {
config *Config
dnsEntriesMu sync.Mutex
}
// NewDNSProvider returns a DNSProvider instance.
func NewDNSProvider() (*DNSProvider, error) {
values, err := env.Get("VERSIO_USERNAME", "VERSIO_PASSWORD")
if err != nil {
return nil, fmt.Errorf("versio: %v", err)
}
config := NewDefaultConfig()
config.Username = values["VERSIO_USERNAME"]
config.Password = values["VERSIO_PASSWORD"]
return NewDNSProviderConfig(config)
}
// NewDNSProviderConfig return a DNSProvider .
func NewDNSProviderConfig(config *Config) (*DNSProvider, error) {
if config == nil {
return nil, errors.New("versio: the configuration of the DNS provider is nil")
}
if config.Username == "" {
return nil, errors.New("versio: the versio username is missing")
}
if config.Password == "" {
return nil, errors.New("versio: the versio password is missing")
}
return &DNSProvider{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)
authZone, err := dns01.FindZoneByFqdn(fqdn)
if err != nil {
return fmt.Errorf("versio: %v", err)
}
// use mutex to prevent race condition from getDNSRecords until postDNSRecords
d.dnsEntriesMu.Lock()
defer d.dnsEntriesMu.Unlock()
zoneName := dns01.UnFqdn(authZone)
domains, err := d.getDNSRecords(zoneName)
if err != nil {
return fmt.Errorf("versio: %v", err)
}
txtRecord := record{
Type: "TXT",
Name: fqdn,
Value: `"` + value + `"`,
TTL: d.config.TTL,
}
// Add new txtRercord to existing array of DNSRecords
msg := &domains.Record
msg.DNSRecords = append(msg.DNSRecords, txtRecord)
err = d.postDNSRecords(zoneName, msg)
if err != nil {
return fmt.Errorf("versio: %v", err)
}
return nil
}
// CleanUp removes the TXT record matching the specified parameters
func (d *DNSProvider) CleanUp(domain, token, keyAuth string) error {
fqdn, _ := dns01.GetRecord(domain, keyAuth)
authZone, err := dns01.FindZoneByFqdn(fqdn)
if err != nil {
return fmt.Errorf("versio: %v", err)
}
// use mutex to prevent race condition from getDNSRecords until postDNSRecords
d.dnsEntriesMu.Lock()
defer d.dnsEntriesMu.Unlock()
zoneName := dns01.UnFqdn(authZone)
domains, err := d.getDNSRecords(zoneName)
if err != nil {
return fmt.Errorf("versio: %v", err)
}
// loop through the existing entries and remove the specific record
msg := &dnsRecord{}
for _, e := range domains.Record.DNSRecords {
if e.Name != fqdn {
msg.DNSRecords = append(msg.DNSRecords, e)
}
}
err = d.postDNSRecords(zoneName, msg)
if err != nil {
return fmt.Errorf("versio: %v", err)
}
return nil
}