traefik/pkg/provider/acme/provider.go

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package acme
import (
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"context"
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"crypto/tls"
"crypto/x509"
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"errors"
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"fmt"
"net/url"
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"reflect"
"strings"
"sync"
"time"
"github.com/containous/traefik/pkg/config/dynamic"
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"github.com/containous/traefik/pkg/log"
"github.com/containous/traefik/pkg/rules"
"github.com/containous/traefik/pkg/safe"
traefiktls "github.com/containous/traefik/pkg/tls"
"github.com/containous/traefik/pkg/types"
"github.com/containous/traefik/pkg/version"
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"github.com/go-acme/lego/certificate"
"github.com/go-acme/lego/challenge"
"github.com/go-acme/lego/challenge/dns01"
"github.com/go-acme/lego/lego"
"github.com/go-acme/lego/providers/dns"
"github.com/go-acme/lego/registration"
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)
var (
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// oscpMustStaple enables OSCP stapling as from https://github.com/go-acme/lego/issues/270
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oscpMustStaple = false
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)
// Configuration holds ACME configuration provided by users
type Configuration struct {
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Email string `description:"Email address used for registration." json:"email,omitempty" toml:"email,omitempty" yaml:"email,omitempty"`
CAServer string `description:"CA server to use." json:"caServer,omitempty" toml:"caServer,omitempty" yaml:"caServer,omitempty"`
Storage string `description:"Storage to use." json:"storage,omitempty" toml:"storage,omitempty" yaml:"storage,omitempty"`
KeyType string `description:"KeyType used for generating certificate private key. Allow value 'EC256', 'EC384', 'RSA2048', 'RSA4096', 'RSA8192'." json:"keyType,omitempty" toml:"keyType,omitempty" yaml:"keyType,omitempty"`
DNSChallenge *DNSChallenge `description:"Activate DNS-01 Challenge." json:"dnsChallenge,omitempty" toml:"dnsChallenge,omitempty" yaml:"dnsChallenge,omitempty" label:"allowEmpty"`
HTTPChallenge *HTTPChallenge `description:"Activate HTTP-01 Challenge." json:"httpChallenge,omitempty" toml:"httpChallenge,omitempty" yaml:"httpChallenge,omitempty" label:"allowEmpty"`
TLSChallenge *TLSChallenge `description:"Activate TLS-ALPN-01 Challenge." json:"tlsChallenge,omitempty" toml:"tlsChallenge,omitempty" yaml:"tlsChallenge,omitempty" label:"allowEmpty"`
}
// SetDefaults sets the default values.
func (a *Configuration) SetDefaults() {
a.CAServer = lego.LEDirectoryProduction
a.Storage = "acme.json"
a.KeyType = "RSA4096"
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}
// CertAndStore allows mapping a TLS certificate to a TLS store.
type CertAndStore struct {
Certificate
Store string
}
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// Certificate is a struct which contains all data needed from an ACME certificate
type Certificate struct {
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Domain types.Domain `json:"domain,omitempty" toml:"domain,omitempty" yaml:"domain,omitempty"`
Certificate []byte `json:"certificate,omitempty" toml:"certificate,omitempty" yaml:"certificate,omitempty"`
Key []byte `json:"key,omitempty" toml:"key,omitempty" yaml:"key,omitempty"`
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}
// DNSChallenge contains DNS challenge Configuration
type DNSChallenge struct {
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Provider string `description:"Use a DNS-01 based challenge provider rather than HTTPS." json:"provider,omitempty" toml:"provider,omitempty" yaml:"provider,omitempty"`
DelayBeforeCheck types.Duration `description:"Assume DNS propagates after a delay in seconds rather than finding and querying nameservers." json:"delayBeforeCheck,omitempty" toml:"delayBeforeCheck,omitempty" yaml:"delayBeforeCheck,omitempty"`
Resolvers []string `description:"Use following DNS servers to resolve the FQDN authority." json:"resolvers,omitempty" toml:"resolvers,omitempty" yaml:"resolvers,omitempty"`
DisablePropagationCheck bool `description:"Disable the DNS propagation checks before notifying ACME that the DNS challenge is ready. [not recommended]" json:"disablePropagationCheck,omitempty" toml:"disablePropagationCheck,omitempty" yaml:"disablePropagationCheck,omitempty"`
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}
// HTTPChallenge contains HTTP challenge Configuration
type HTTPChallenge struct {
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EntryPoint string `description:"HTTP challenge EntryPoint" json:"entryPoint,omitempty" toml:"entryPoint,omitempty" yaml:"entryPoint,omitempty"`
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}
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// TLSChallenge contains TLS challenge Configuration
type TLSChallenge struct{}
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// Provider holds configurations of the provider.
type Provider struct {
*Configuration
ResolverName string
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Store Store `json:"store,omitempty" toml:"store,omitempty" yaml:"store,omitempty"`
ChallengeStore ChallengeStore
certificates []*CertAndStore
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account *Account
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client *lego.Client
certsChan chan *CertAndStore
configurationChan chan<- dynamic.Message
tlsManager *traefiktls.Manager
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clientMutex sync.Mutex
configFromListenerChan chan dynamic.Configuration
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pool *safe.Pool
resolvingDomains map[string]struct{}
resolvingDomainsMutex sync.RWMutex
}
// SetTLSManager sets the tls manager to use
func (p *Provider) SetTLSManager(tlsManager *traefiktls.Manager) {
p.tlsManager = tlsManager
}
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// SetConfigListenerChan initializes the configFromListenerChan
func (p *Provider) SetConfigListenerChan(configFromListenerChan chan dynamic.Configuration) {
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p.configFromListenerChan = configFromListenerChan
}
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// ListenConfiguration sets a new Configuration into the configFromListenerChan
func (p *Provider) ListenConfiguration(config dynamic.Configuration) {
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p.configFromListenerChan <- config
}
// Init for compatibility reason the BaseProvider implements an empty Init
func (p *Provider) Init() error {
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ctx := log.With(context.Background(), log.Str(log.ProviderName, p.ResolverName+".acme"))
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logger := log.FromContext(ctx)
if len(p.Configuration.Storage) == 0 {
return errors.New("unable to initialize ACME provider with no storage location for the certificates")
}
var err error
p.account, err = p.Store.GetAccount(p.ResolverName)
if err != nil {
return fmt.Errorf("unable to get ACME account: %v", err)
}
// Reset Account if caServer changed, thus registration URI can be updated
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if p.account != nil && p.account.Registration != nil && !isAccountMatchingCaServer(ctx, p.account.Registration.URI, p.CAServer) {
logger.Info("Account URI does not match the current CAServer. The account will be reset.")
p.account = nil
}
p.certificates, err = p.Store.GetCertificates(p.ResolverName)
if err != nil {
return fmt.Errorf("unable to get ACME certificates : %v", err)
}
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// Init the currently resolved domain map
p.resolvingDomains = make(map[string]struct{})
return nil
}
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func isAccountMatchingCaServer(ctx context.Context, accountURI string, serverURI string) bool {
logger := log.FromContext(ctx)
aru, err := url.Parse(accountURI)
if err != nil {
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logger.Infof("Unable to parse account.Registration URL: %v", err)
return false
}
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cau, err := url.Parse(serverURI)
if err != nil {
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logger.Infof("Unable to parse CAServer URL: %v", err)
return false
}
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return cau.Hostname() == aru.Hostname()
}
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// Provide allows the file provider to provide configurations to traefik
// using the given Configuration channel.
func (p *Provider) Provide(configurationChan chan<- dynamic.Message, pool *safe.Pool) error {
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ctx := log.With(context.Background(), log.Str(log.ProviderName, p.ResolverName+".acme"))
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p.pool = pool
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p.watchCertificate(ctx)
p.watchNewDomains(ctx)
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p.configurationChan = configurationChan
p.refreshCertificates()
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p.renewCertificates(ctx)
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ticker := time.NewTicker(24 * time.Hour)
pool.Go(func(stop chan bool) {
for {
select {
case <-ticker.C:
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p.renewCertificates(ctx)
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case <-stop:
ticker.Stop()
return
}
}
})
return nil
}
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func (p *Provider) getClient() (*lego.Client, error) {
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p.clientMutex.Lock()
defer p.clientMutex.Unlock()
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ctx := log.With(context.Background(), log.Str(log.ProviderName, p.ResolverName+".acme"))
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logger := log.FromContext(ctx)
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if p.client != nil {
return p.client, nil
}
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account, err := p.initAccount(ctx)
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if err != nil {
return nil, err
}
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logger.Debug("Building ACME client...")
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caServer := lego.LEDirectoryProduction
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if len(p.CAServer) > 0 {
caServer = p.CAServer
}
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logger.Debug(caServer)
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config := lego.NewConfig(account)
config.CADirURL = caServer
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config.Certificate.KeyType = account.KeyType
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config.UserAgent = fmt.Sprintf("containous-traefik/%s", version.Version)
client, err := lego.NewClient(config)
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if err != nil {
return nil, err
}
// New users will need to register; be sure to save it
if account.GetRegistration() == nil {
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logger.Info("Register...")
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reg, errR := client.Registration.Register(registration.RegisterOptions{TermsOfServiceAgreed: true})
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if errR != nil {
return nil, errR
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}
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account.Registration = reg
}
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// Save the account once before all the certificates generation/storing
// No certificate can be generated if account is not initialized
err = p.Store.SaveAccount(p.ResolverName, account)
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if err != nil {
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return nil, err
}
if (p.DNSChallenge == nil || len(p.DNSChallenge.Provider) == 0) &&
(p.HTTPChallenge == nil || len(p.HTTPChallenge.EntryPoint) == 0) &&
p.TLSChallenge == nil {
return nil, errors.New("ACME challenge not specified, please select TLS or HTTP or DNS Challenge")
}
if p.DNSChallenge != nil && len(p.DNSChallenge.Provider) > 0 {
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logger.Debugf("Using DNS Challenge provider: %s", p.DNSChallenge.Provider)
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var provider challenge.Provider
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provider, err = dns.NewDNSChallengeProviderByName(p.DNSChallenge.Provider)
if err != nil {
return nil, err
}
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err = client.Challenge.SetDNS01Provider(provider,
dns01.CondOption(len(p.DNSChallenge.Resolvers) > 0, dns01.AddRecursiveNameservers(p.DNSChallenge.Resolvers)),
dns01.CondOption(p.DNSChallenge.DisablePropagationCheck || p.DNSChallenge.DelayBeforeCheck > 0,
dns01.AddPreCheck(func(_, _ string) (bool, error) {
if p.DNSChallenge.DelayBeforeCheck > 0 {
log.Debugf("Delaying %d rather than validating DNS propagation now.", p.DNSChallenge.DelayBeforeCheck)
time.Sleep(time.Duration(p.DNSChallenge.DelayBeforeCheck))
}
return true, nil
})),
)
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if err != nil {
return nil, err
}
}
if p.HTTPChallenge != nil && len(p.HTTPChallenge.EntryPoint) > 0 {
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logger.Debug("Using HTTP Challenge provider.")
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err = client.Challenge.SetHTTP01Provider(&challengeHTTP{Store: p.ChallengeStore})
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if err != nil {
return nil, err
}
}
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if p.TLSChallenge != nil {
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logger.Debug("Using TLS Challenge provider.")
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err = client.Challenge.SetTLSALPN01Provider(&challengeTLSALPN{Store: p.ChallengeStore})
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if err != nil {
return nil, err
}
}
p.client = client
return p.client, nil
}
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func (p *Provider) initAccount(ctx context.Context) (*Account, error) {
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if p.account == nil || len(p.account.Email) == 0 {
var err error
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p.account, err = NewAccount(ctx, p.Email, p.KeyType)
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if err != nil {
return nil, err
}
}
// Set the KeyType if not already defined in the account
if len(p.account.KeyType) == 0 {
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p.account.KeyType = GetKeyType(ctx, p.KeyType)
}
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return p.account, nil
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}
func (p *Provider) resolveDomains(ctx context.Context, domains []string, tlsStore string) {
if len(domains) == 0 {
log.FromContext(ctx).Debug("No domain parsed in provider ACME")
return
}
log.FromContext(ctx).Debugf("Try to challenge certificate for domain %v founded in HostSNI rule", domains)
var domain types.Domain
if len(domains) > 0 {
domain = types.Domain{Main: domains[0]}
if len(domains) > 1 {
domain.SANs = domains[1:]
}
safe.Go(func() {
if _, err := p.resolveCertificate(ctx, domain, tlsStore); err != nil {
log.FromContext(ctx).Errorf("Unable to obtain ACME certificate for domains %q: %v", strings.Join(domains, ","), err)
}
})
}
}
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func (p *Provider) watchNewDomains(ctx context.Context) {
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p.pool.Go(func(stop chan bool) {
for {
select {
case config := <-p.configFromListenerChan:
if config.TCP != nil {
for routerName, route := range config.TCP.Routers {
if route.TLS == nil || route.TLS.CertResolver != p.ResolverName {
continue
}
ctxRouter := log.With(ctx, log.Str(log.RouterName, routerName), log.Str(log.Rule, route.Rule))
tlsStore := "default"
if len(route.TLS.Domains) > 0 {
for _, domain := range route.TLS.Domains {
if domain.Main != dns01.UnFqdn(domain.Main) {
log.Warnf("FQDN detected, please remove the trailing dot: %s", domain.Main)
}
for _, san := range domain.SANs {
if san != dns01.UnFqdn(san) {
log.Warnf("FQDN detected, please remove the trailing dot: %s", san)
}
}
}
domains := deleteUnnecessaryDomains(ctxRouter, route.TLS.Domains)
for i := 0; i < len(domains); i++ {
domain := domains[i]
safe.Go(func() {
if _, err := p.resolveCertificate(ctx, domain, tlsStore); err != nil {
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log.WithoutContext().WithField(log.ProviderName, p.ResolverName+".acme").
Errorf("Unable to obtain ACME certificate for domains %q : %v", strings.Join(domain.ToStrArray(), ","), err)
}
})
}
} else {
domains, err := rules.ParseHostSNI(route.Rule)
if err != nil {
log.FromContext(ctxRouter).Errorf("Error parsing domains in provider ACME: %v", err)
continue
}
p.resolveDomains(ctxRouter, domains, tlsStore)
}
}
}
for routerName, route := range config.HTTP.Routers {
if route.TLS == nil || route.TLS.CertResolver != p.ResolverName {
continue
}
ctxRouter := log.With(ctx, log.Str(log.RouterName, routerName), log.Str(log.Rule, route.Rule))
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tlsStore := "default"
if len(route.TLS.Domains) > 0 {
domains := deleteUnnecessaryDomains(ctxRouter, route.TLS.Domains)
for i := 0; i < len(domains); i++ {
domain := domains[i]
safe.Go(func() {
if _, err := p.resolveCertificate(ctx, domain, tlsStore); err != nil {
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log.WithoutContext().WithField(log.ProviderName, p.ResolverName+".acme").
Errorf("Unable to obtain ACME certificate for domains %q : %v", strings.Join(domain.ToStrArray(), ","), err)
}
})
}
} else {
domains, err := rules.ParseDomains(route.Rule)
if err != nil {
log.FromContext(ctxRouter).Errorf("Error parsing domains in provider ACME: %v", err)
continue
}
p.resolveDomains(ctxRouter, domains, tlsStore)
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}
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}
case <-stop:
return
}
}
})
}
func (p *Provider) resolveCertificate(ctx context.Context, domain types.Domain, tlsStore string) (*certificate.Resource, error) {
domains, err := p.getValidDomains(ctx, domain)
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if err != nil {
return nil, err
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}
// Check provided certificates
uncheckedDomains := p.getUncheckedDomains(ctx, domains, tlsStore)
if len(uncheckedDomains) == 0 {
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return nil, nil
}
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p.addResolvingDomains(uncheckedDomains)
defer p.removeResolvingDomains(uncheckedDomains)
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logger := log.FromContext(ctx)
logger.Debugf("Loading ACME certificates %+v...", uncheckedDomains)
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client, err := p.getClient()
if err != nil {
return nil, fmt.Errorf("cannot get ACME client %v", err)
}
request := certificate.ObtainRequest{
Domains: domains,
Bundle: true,
MustStaple: oscpMustStaple,
}
cert, err := client.Certificate.Obtain(request)
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if err != nil {
return nil, fmt.Errorf("unable to generate a certificate for the domains %v: %v", uncheckedDomains, err)
}
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if cert == nil {
return nil, fmt.Errorf("domains %v do not generate a certificate", uncheckedDomains)
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}
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if len(cert.Certificate) == 0 || len(cert.PrivateKey) == 0 {
return nil, fmt.Errorf("domains %v generate certificate with no value: %v", uncheckedDomains, cert)
}
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logger.Debugf("Certificates obtained for domains %+v", uncheckedDomains)
if len(uncheckedDomains) > 1 {
domain = types.Domain{Main: uncheckedDomains[0], SANs: uncheckedDomains[1:]}
} else {
domain = types.Domain{Main: uncheckedDomains[0]}
}
p.addCertificateForDomain(domain, cert.Certificate, cert.PrivateKey, tlsStore)
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return cert, nil
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}
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func (p *Provider) removeResolvingDomains(resolvingDomains []string) {
p.resolvingDomainsMutex.Lock()
defer p.resolvingDomainsMutex.Unlock()
for _, domain := range resolvingDomains {
delete(p.resolvingDomains, domain)
}
}
func (p *Provider) addResolvingDomains(resolvingDomains []string) {
p.resolvingDomainsMutex.Lock()
defer p.resolvingDomainsMutex.Unlock()
for _, domain := range resolvingDomains {
p.resolvingDomains[domain] = struct{}{}
}
}
func (p *Provider) addCertificateForDomain(domain types.Domain, certificate []byte, key []byte, tlsStore string) {
p.certsChan <- &CertAndStore{Certificate: Certificate{Certificate: certificate, Key: key, Domain: domain}, Store: tlsStore}
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}
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// deleteUnnecessaryDomains deletes from the configuration :
// - Duplicated domains
// - Domains which are checked by wildcard domain
func deleteUnnecessaryDomains(ctx context.Context, domains []types.Domain) []types.Domain {
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var newDomains []types.Domain
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logger := log.FromContext(ctx)
for idxDomainToCheck, domainToCheck := range domains {
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keepDomain := true
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for idxDomain, domain := range domains {
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if idxDomainToCheck == idxDomain {
continue
}
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if reflect.DeepEqual(domain, domainToCheck) {
if idxDomainToCheck > idxDomain {
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logger.Warnf("The domain %v is duplicated in the configuration but will be process by ACME provider only once.", domainToCheck)
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keepDomain = false
}
break
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}
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// Check if CN or SANS to check already exists
// or can not be checked by a wildcard
var newDomainsToCheck []string
for _, domainProcessed := range domainToCheck.ToStrArray() {
if idxDomain < idxDomainToCheck && isDomainAlreadyChecked(domainProcessed, domain.ToStrArray()) {
// The domain is duplicated in a CN
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logger.Warnf("Domain %q is duplicated in the configuration or validated by the domain %v. It will be processed once.", domainProcessed, domain)
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continue
} else if domain.Main != domainProcessed && strings.HasPrefix(domain.Main, "*") && isDomainAlreadyChecked(domainProcessed, []string{domain.Main}) {
// Check if a wildcard can validate the domain
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logger.Warnf("Domain %q will not be processed by ACME provider because it is validated by the wildcard %q", domainProcessed, domain.Main)
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continue
}
newDomainsToCheck = append(newDomainsToCheck, domainProcessed)
}
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// Delete the domain if both Main and SANs can be validated by the wildcard domain
// otherwise keep the unchecked values
if newDomainsToCheck == nil {
keepDomain = false
break
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}
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domainToCheck.Set(newDomainsToCheck)
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}
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if keepDomain {
newDomains = append(newDomains, domainToCheck)
}
}
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return newDomains
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}
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func (p *Provider) watchCertificate(ctx context.Context) {
p.certsChan = make(chan *CertAndStore)
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p.pool.Go(func(stop chan bool) {
for {
select {
case cert := <-p.certsChan:
certUpdated := false
for _, domainsCertificate := range p.certificates {
if reflect.DeepEqual(cert.Domain, domainsCertificate.Certificate.Domain) {
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domainsCertificate.Certificate = cert.Certificate
certUpdated = true
break
}
}
if !certUpdated {
p.certificates = append(p.certificates, cert)
}
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err := p.saveCertificates()
if err != nil {
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log.FromContext(ctx).Error(err)
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}
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case <-stop:
return
}
}
})
}
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func (p *Provider) saveCertificates() error {
err := p.Store.SaveCertificates(p.ResolverName, p.certificates)
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p.refreshCertificates()
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return err
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}
func (p *Provider) refreshCertificates() {
conf := dynamic.Message{
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ProviderName: p.ResolverName + ".acme",
Configuration: &dynamic.Configuration{
HTTP: &dynamic.HTTPConfiguration{
Routers: map[string]*dynamic.Router{},
Middlewares: map[string]*dynamic.Middleware{},
Services: map[string]*dynamic.Service{},
},
TLS: &dynamic.TLSConfiguration{},
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},
}
for _, cert := range p.certificates {
certConf := &traefiktls.CertAndStores{
Certificate: traefiktls.Certificate{
CertFile: traefiktls.FileOrContent(cert.Certificate.Certificate),
KeyFile: traefiktls.FileOrContent(cert.Key),
},
Stores: []string{cert.Store},
}
conf.Configuration.TLS.Certificates = append(conf.Configuration.TLS.Certificates, certConf)
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}
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p.configurationChan <- conf
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}
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func (p *Provider) renewCertificates(ctx context.Context) {
logger := log.FromContext(ctx)
logger.Info("Testing certificate renew...")
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for _, cert := range p.certificates {
crt, err := getX509Certificate(ctx, &cert.Certificate)
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// If there's an error, we assume the cert is broken, and needs update
// <= 30 days left, renew certificate
if err != nil || crt == nil || crt.NotAfter.Before(time.Now().Add(24*30*time.Hour)) {
client, err := p.getClient()
if err != nil {
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logger.Infof("Error renewing certificate from LE : %+v, %v", cert.Domain, err)
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continue
}
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logger.Infof("Renewing certificate from LE : %+v", cert.Domain)
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renewedCert, err := client.Certificate.Renew(certificate.Resource{
Domain: cert.Domain.Main,
PrivateKey: cert.Key,
Certificate: cert.Certificate.Certificate,
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}, true, oscpMustStaple)
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if err != nil {
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logger.Errorf("Error renewing certificate from LE: %v, %v", cert.Domain, err)
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continue
}
if len(renewedCert.Certificate) == 0 || len(renewedCert.PrivateKey) == 0 {
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logger.Errorf("domains %v renew certificate with no value: %v", cert.Domain.ToStrArray(), cert)
continue
}
p.addCertificateForDomain(cert.Domain, renewedCert.Certificate, renewedCert.PrivateKey, cert.Store)
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}
}
}
// Get provided certificate which check a domains list (Main and SANs)
// from static and dynamic provided certificates
func (p *Provider) getUncheckedDomains(ctx context.Context, domainsToCheck []string, tlsStore string) []string {
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p.resolvingDomainsMutex.RLock()
defer p.resolvingDomainsMutex.RUnlock()
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log.FromContext(ctx).Debugf("Looking for provided certificate(s) to validate %q...", domainsToCheck)
allDomains := p.tlsManager.GetStore(tlsStore).GetAllDomains()
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// Get ACME certificates
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for _, cert := range p.certificates {
allDomains = append(allDomains, strings.Join(cert.Domain.ToStrArray(), ","))
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}
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// Get currently resolved domains
for domain := range p.resolvingDomains {
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allDomains = append(allDomains, domain)
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}
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return searchUncheckedDomains(ctx, domainsToCheck, allDomains)
}
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func searchUncheckedDomains(ctx context.Context, domainsToCheck []string, existentDomains []string) []string {
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var uncheckedDomains []string
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for _, domainToCheck := range domainsToCheck {
if !isDomainAlreadyChecked(domainToCheck, existentDomains) {
uncheckedDomains = append(uncheckedDomains, domainToCheck)
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}
}
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logger := log.FromContext(ctx)
if len(uncheckedDomains) == 0 {
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logger.Debugf("No ACME certificate generation required for domains %q.", domainsToCheck)
} else {
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logger.Debugf("Domains %q need ACME certificates generation for domains %q.", domainsToCheck, strings.Join(uncheckedDomains, ","))
}
return uncheckedDomains
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}
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func getX509Certificate(ctx context.Context, cert *Certificate) (*x509.Certificate, error) {
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logger := log.FromContext(ctx)
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tlsCert, err := tls.X509KeyPair(cert.Certificate, cert.Key)
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if err != nil {
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logger.Errorf("Failed to load TLS key pair from ACME certificate for domain %q (SAN : %q), certificate will be renewed : %v", cert.Domain.Main, strings.Join(cert.Domain.SANs, ","), err)
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return nil, err
}
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crt := tlsCert.Leaf
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if crt == nil {
crt, err = x509.ParseCertificate(tlsCert.Certificate[0])
if err != nil {
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logger.Errorf("Failed to parse TLS key pair from ACME certificate for domain %q (SAN : %q), certificate will be renewed : %v", cert.Domain.Main, strings.Join(cert.Domain.SANs, ","), err)
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}
}
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return crt, err
}
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// getValidDomains checks if given domain is allowed to generate a ACME certificate and return it
func (p *Provider) getValidDomains(ctx context.Context, domain types.Domain) ([]string, error) {
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domains := domain.ToStrArray()
if len(domains) == 0 {
return nil, errors.New("unable to generate a certificate in ACME provider when no domain is given")
}
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if strings.HasPrefix(domain.Main, "*") {
if p.DNSChallenge == nil {
return nil, fmt.Errorf("unable to generate a wildcard certificate in ACME provider for domain %q : ACME needs a DNSChallenge", strings.Join(domains, ","))
}
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if strings.HasPrefix(domain.Main, "*.*") {
return nil, fmt.Errorf("unable to generate a wildcard certificate in ACME provider for domain %q : ACME does not allow '*.*' wildcard domain", strings.Join(domains, ","))
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}
}
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var cleanDomains []string
for _, domain := range domains {
canonicalDomain := types.CanonicalDomain(domain)
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cleanDomain := dns01.UnFqdn(canonicalDomain)
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if canonicalDomain != cleanDomain {
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log.FromContext(ctx).Warnf("FQDN detected, please remove the trailing dot: %s", canonicalDomain)
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}
cleanDomains = append(cleanDomains, cleanDomain)
}
return cleanDomains, nil
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}
func isDomainAlreadyChecked(domainToCheck string, existentDomains []string) bool {
for _, certDomains := range existentDomains {
for _, certDomain := range strings.Split(certDomains, ",") {
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if types.MatchDomain(domainToCheck, certDomain) {
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return true
}
}
}
return false
}