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provider.go
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provider.go
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package acme
import (
"crypto/tls"
"crypto/x509"
"fmt"
"io/ioutil"
fmtlog "log"
"net/url"
"reflect"
"strings"
"sync"
"time"
"github.com/cenk/backoff"
"github.com/containous/flaeg"
"github.com/containous/traefik/log"
"github.com/containous/traefik/rules"
"github.com/containous/traefik/safe"
traefiktls "github.com/containous/traefik/tls"
"github.com/containous/traefik/types"
"github.com/containous/traefik/version"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"github.com/xenolf/lego/certificate"
"github.com/xenolf/lego/challenge"
"github.com/xenolf/lego/challenge/dns01"
"github.com/xenolf/lego/lego"
legolog "github.com/xenolf/lego/log"
"github.com/xenolf/lego/providers/dns"
"github.com/xenolf/lego/registration"
)
var (
// OSCPMustStaple enables OSCP stapling as from https://github.com/xenolf/lego/issues/270
OSCPMustStaple = false
)
// Configuration holds ACME configuration provided by users
type Configuration struct {
Email string `description:"Email address used for registration"`
ACMELogging bool `description:"Enable debug logging of ACME actions."`
CAServer string `description:"CA server to use."`
Storage string `description:"Storage to use."`
EntryPoint string `description:"EntryPoint to use."`
KeyType string `description:"KeyType used for generating certificate private key. Allow value 'EC256', 'EC384', 'RSA2048', 'RSA4096', 'RSA8192'. Default to 'RSA4096'"`
OnHostRule bool `description:"Enable certificate generation on frontends Host rules."`
OnDemand bool `description:"Enable on demand certificate generation. This will request a certificate from Let's Encrypt during the first TLS handshake for a hostname that does not yet have a certificate."` // Deprecated
DNSChallenge *DNSChallenge `description:"Activate DNS-01 Challenge"`
HTTPChallenge *HTTPChallenge `description:"Activate HTTP-01 Challenge"`
TLSChallenge *TLSChallenge `description:"Activate TLS-ALPN-01 Challenge"`
Domains []types.Domain `description:"CN and SANs (alternative domains) to each main domain using format: --acme.domains='main.com,san1.com,san2.com' --acme.domains='*.main.net'. No SANs for wildcards domain. Wildcard domains only accepted with DNSChallenge"`
}
// Provider holds configurations of the provider.
type Provider struct {
*Configuration
Store Store
certificates []*Certificate
account *Account
client *lego.Client
certsChan chan *Certificate
configurationChan chan<- types.ConfigMessage
certificateStore *traefiktls.CertificateStore
clientMutex sync.Mutex
configFromListenerChan chan types.Configuration
pool *safe.Pool
resolvingDomains map[string]struct{}
resolvingDomainsMutex sync.RWMutex
}
// Certificate is a struct which contains all data needed from an ACME certificate
type Certificate struct {
Domain types.Domain
Certificate []byte
Key []byte
}
// DNSChallenge contains DNS challenge Configuration
type DNSChallenge struct {
Provider string `description:"Use a DNS-01 based challenge provider rather than HTTPS."`
DelayBeforeCheck flaeg.Duration `description:"Assume DNS propagates after a delay in seconds rather than finding and querying nameservers."`
Resolvers types.DNSResolvers `description:"Use following DNS servers to resolve the FQDN authority."`
DisablePropagationCheck bool `description:"Disable the DNS propagation checks before notifying ACME that the DNS challenge is ready. [not recommended]"`
preCheckTimeout time.Duration
preCheckInterval time.Duration
}
// HTTPChallenge contains HTTP challenge Configuration
type HTTPChallenge struct {
EntryPoint string `description:"HTTP challenge EntryPoint"`
}
// TLSChallenge contains TLS challenge Configuration
type TLSChallenge struct{}
// SetConfigListenerChan initializes the configFromListenerChan
func (p *Provider) SetConfigListenerChan(configFromListenerChan chan types.Configuration) {
p.configFromListenerChan = configFromListenerChan
}
// SetCertificateStore allow to initialize certificate store
func (p *Provider) SetCertificateStore(certificateStore *traefiktls.CertificateStore) {
p.certificateStore = certificateStore
}
// ListenConfiguration sets a new Configuration into the configFromListenerChan
func (p *Provider) ListenConfiguration(config types.Configuration) {
p.configFromListenerChan <- config
}
// ListenRequest resolves new certificates for a domain from an incoming request and return a valid Certificate to serve (onDemand option)
func (p *Provider) ListenRequest(domain string) (*tls.Certificate, error) {
acmeCert, err := p.resolveCertificate(types.Domain{Main: domain}, false)
if acmeCert == nil || err != nil {
return nil, err
}
cert, err := tls.X509KeyPair(acmeCert.Certificate, acmeCert.PrivateKey)
return &cert, err
}
// Init for compatibility reason the BaseProvider implements an empty Init
func (p *Provider) Init(_ types.Constraints) error {
if p.ACMELogging {
legolog.Logger = fmtlog.New(log.WriterLevel(logrus.InfoLevel), "legolog: ", 0)
} else {
legolog.Logger = fmtlog.New(ioutil.Discard, "", 0)
}
if p.Store == nil {
return errors.New("no store found for the ACME provider")
}
var err error
p.account, err = p.Store.GetAccount()
if err != nil {
return fmt.Errorf("unable to get ACME account : %v", err)
}
// Reset Account if caServer changed, thus registration URI can be updated
if p.account != nil && p.account.Registration != nil && !isAccountMatchingCaServer(p.account.Registration.URI, p.CAServer) {
log.Info("Account URI does not match the current CAServer. The account will be reset")
p.account = nil
}
p.certificates, err = p.Store.GetCertificates()
if err != nil {
return fmt.Errorf("unable to get ACME certificates : %v", err)
}
// Init the currently resolved domain map
p.resolvingDomains = make(map[string]struct{})
return nil
}
func isAccountMatchingCaServer(accountURI string, serverURI string) bool {
aru, err := url.Parse(accountURI)
if err != nil {
log.Infof("Unable to parse account.Registration URL : %v", err)
return false
}
cau, err := url.Parse(serverURI)
if err != nil {
log.Infof("Unable to parse CAServer URL : %v", err)
return false
}
return cau.Hostname() == aru.Hostname()
}
// Provide allows the file provider to provide configurations to traefik
// using the given Configuration channel.
func (p *Provider) Provide(configurationChan chan<- types.ConfigMessage, pool *safe.Pool) error {
p.pool = pool
p.watchCertificate()
p.watchNewDomains()
p.configurationChan = configurationChan
p.refreshCertificates()
p.deleteUnnecessaryDomains()
for i := 0; i < len(p.Domains); i++ {
domain := p.Domains[i]
safe.Go(func() {
if _, err := p.resolveCertificate(domain, true); err != nil {
log.Errorf("Unable to obtain ACME certificate for domains %q : %v", strings.Join(domain.ToStrArray(), ","), err)
}
})
}
p.renewCertificates()
ticker := time.NewTicker(24 * time.Hour)
pool.Go(func(stop chan bool) {
for {
select {
case <-ticker.C:
p.renewCertificates()
case <-stop:
ticker.Stop()
return
}
}
})
return nil
}
func (p *Provider) getClient() (*lego.Client, error) {
p.clientMutex.Lock()
defer p.clientMutex.Unlock()
if p.client != nil {
return p.client, nil
}
account, err := p.initAccount()
if err != nil {
return nil, err
}
log.Debug("Building ACME client...")
caServer := "https://acme-v02.api.letsencrypt.org/directory"
if len(p.CAServer) > 0 {
caServer = p.CAServer
}
log.Debug(caServer)
config := lego.NewConfig(account)
config.CADirURL = caServer
config.Certificate.KeyType = account.KeyType
config.UserAgent = fmt.Sprintf("containous-traefik/%s", version.Version)
client, err := lego.NewClient(config)
if err != nil {
return nil, err
}
// New users will need to register; be sure to save it
if account.GetRegistration() == nil {
log.Info("Register...")
reg, err := client.Registration.Register(registration.RegisterOptions{TermsOfServiceAgreed: true})
if err != nil {
return nil, err
}
account.Registration = reg
}
// Save the account once before all the certificates generation/storing
// No certificate can be generated if account is not initialized
err = p.Store.SaveAccount(account)
if err != nil {
return nil, err
}
if p.DNSChallenge != nil && len(p.DNSChallenge.Provider) > 0 {
log.Debugf("Using DNS Challenge provider: %s", p.DNSChallenge.Provider)
var provider challenge.Provider
provider, err = dns.NewDNSChallengeProviderByName(p.DNSChallenge.Provider)
if err != nil {
return nil, err
}
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
})),
)
if err != nil {
return nil, err
}
// Same default values than LEGO
p.DNSChallenge.preCheckTimeout = 60 * time.Second
p.DNSChallenge.preCheckInterval = 2 * time.Second
// Set the precheck timeout into the DNSChallenge provider
if challengeProviderTimeout, ok := provider.(challenge.ProviderTimeout); ok {
p.DNSChallenge.preCheckTimeout, p.DNSChallenge.preCheckInterval = challengeProviderTimeout.Timeout()
}
} else if p.HTTPChallenge != nil && len(p.HTTPChallenge.EntryPoint) > 0 {
log.Debug("Using HTTP Challenge provider.")
err = client.Challenge.SetHTTP01Provider(&challengeHTTP{Store: p.Store})
if err != nil {
return nil, err
}
} else if p.TLSChallenge != nil {
log.Debug("Using TLS Challenge provider.")
err = client.Challenge.SetTLSALPN01Provider(&challengeTLSALPN{Store: p.Store})
if err != nil {
return nil, err
}
} else {
return nil, errors.New("ACME challenge not specified, please select TLS or HTTP or DNS Challenge")
}
p.client = client
return p.client, nil
}
func (p *Provider) initAccount() (*Account, error) {
if p.account == nil || len(p.account.Email) == 0 {
var err error
p.account, err = NewAccount(p.Email, p.KeyType)
if err != nil {
return nil, err
}
}
// Set the KeyType if not already defined in the account
if len(p.account.KeyType) == 0 {
p.account.KeyType = GetKeyType(p.KeyType)
}
return p.account, nil
}
func contains(entryPoints []string, acmeEntryPoint string) bool {
for _, entryPoint := range entryPoints {
if entryPoint == acmeEntryPoint {
return true
}
}
return false
}
func (p *Provider) watchNewDomains() {
p.pool.Go(func(stop chan bool) {
for {
select {
case config := <-p.configFromListenerChan:
for _, frontend := range config.Frontends {
if !contains(frontend.EntryPoints, p.EntryPoint) {
continue
}
for _, route := range frontend.Routes {
domainRules := rules.Rules{}
domains, err := domainRules.ParseDomains(route.Rule)
if err != nil {
log.Errorf("Error parsing domains in provider ACME: %v", err)
continue
}
if len(domains) == 0 {
log.Debugf("No domain parsed in rule %q in provider ACME", route.Rule)
continue
}
log.Debugf("Try to challenge certificate for domain %v founded in Host 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(domain, false); err != nil {
log.Errorf("Unable to obtain ACME certificate for domains %q detected thanks to rule %q : %v", strings.Join(domains, ","), route.Rule, err)
}
})
}
}
}
case <-stop:
return
}
}
})
}
func (p *Provider) resolveCertificate(domain types.Domain, domainFromConfigurationFile bool) (*certificate.Resource, error) {
domains, err := p.getValidDomains(domain, domainFromConfigurationFile)
if err != nil {
return nil, err
}
// Check provided certificates
uncheckedDomains := p.getUncheckedDomains(domains, !domainFromConfigurationFile)
if len(uncheckedDomains) == 0 {
return nil, nil
}
p.addResolvingDomains(uncheckedDomains)
defer p.removeResolvingDomains(uncheckedDomains)
log.Debugf("Loading ACME certificates %+v...", uncheckedDomains)
client, err := p.getClient()
if err != nil {
return nil, fmt.Errorf("cannot get ACME client %v", err)
}
var cert *certificate.Resource
bundle := true
if p.useCertificateWithRetry(uncheckedDomains) {
cert, err = obtainCertificateWithRetry(domains, client, p.DNSChallenge.preCheckTimeout, p.DNSChallenge.preCheckInterval, bundle)
} else {
request := certificate.ObtainRequest{
Domains: domains,
Bundle: bundle,
MustStaple: OSCPMustStaple,
}
cert, err = client.Certificate.Obtain(request)
}
if err != nil {
return nil, fmt.Errorf("unable to generate a certificate for the domains %v: %v", uncheckedDomains, err)
}
if cert == nil {
return nil, fmt.Errorf("domains %v do not generate a certificate", uncheckedDomains)
}
if len(cert.Certificate) == 0 || len(cert.PrivateKey) == 0 {
return nil, fmt.Errorf("domains %v generate certificate with no value: %v", uncheckedDomains, cert)
}
log.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)
return cert, nil
}
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) useCertificateWithRetry(domains []string) bool {
// Check if we can use the retry mechanism only if we use the DNS Challenge and if is there are at least 2 domains to check
if p.DNSChallenge != nil && len(domains) > 1 {
rootDomain := ""
for _, searchWildcardDomain := range domains {
// Search a wildcard domain if not already found
if len(rootDomain) == 0 && strings.HasPrefix(searchWildcardDomain, "*.") {
rootDomain = strings.TrimPrefix(searchWildcardDomain, "*.")
if len(rootDomain) > 0 {
// Look for a root domain which matches the wildcard domain
for _, searchRootDomain := range domains {
if rootDomain == searchRootDomain {
// If the domains list contains a wildcard domain and its root domain, we can use the retry mechanism to obtain the certificate
return true
}
}
}
// There is only one wildcard domain in the slice, if its root domain has not been found, the retry mechanism does not have to be used
return false
}
}
}
return false
}
func obtainCertificateWithRetry(domains []string, client *lego.Client, timeout, interval time.Duration, bundle bool) (*certificate.Resource, error) {
var cert *certificate.Resource
var err error
operation := func() error {
request := certificate.ObtainRequest{
Domains: domains,
Bundle: bundle,
MustStaple: OSCPMustStaple,
}
cert, err = client.Certificate.Obtain(request)
return err
}
notify := func(err error, time time.Duration) {
log.Errorf("Error obtaining certificate retrying in %s", time)
}
// Define a retry backOff to let LEGO tries twice to obtain a certificate for both wildcard and root domain
ebo := backoff.NewExponentialBackOff()
ebo.MaxElapsedTime = 2 * timeout
ebo.MaxInterval = interval
rbo := backoff.WithMaxRetries(ebo, 2)
err = backoff.RetryNotify(safe.OperationWithRecover(operation), rbo, notify)
if err != nil {
log.Errorf("Error obtaining certificate: %v", err)
return nil, err
}
return cert, nil
}
func (p *Provider) addCertificateForDomain(domain types.Domain, certificate []byte, key []byte) {
p.certsChan <- &Certificate{Certificate: certificate, Key: key, Domain: domain}
}
// deleteUnnecessaryDomains deletes from the configuration :
// - Duplicated domains
// - Domains which are checked by wildcard domain
func (p *Provider) deleteUnnecessaryDomains() {
var newDomains []types.Domain
for idxDomainToCheck, domainToCheck := range p.Domains {
keepDomain := true
for idxDomain, domain := range p.Domains {
if idxDomainToCheck == idxDomain {
continue
}
if reflect.DeepEqual(domain, domainToCheck) {
if idxDomainToCheck > idxDomain {
log.Warnf("The domain %v is duplicated in the configuration but will be process by ACME provider only once.", domainToCheck)
keepDomain = false
}
break
}
// 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
log.Warnf("Domain %q is duplicated in the configuration or validated by the domain %v. It will be processed once.", domainProcessed, domain)
continue
} else if domain.Main != domainProcessed && strings.HasPrefix(domain.Main, "*") && isDomainAlreadyChecked(domainProcessed, []string{domain.Main}) {
// Check if a wildcard can validate the domain
log.Warnf("Domain %q will not be processed by ACME provider because it is validated by the wildcard %q", domainProcessed, domain.Main)
continue
}
newDomainsToCheck = append(newDomainsToCheck, domainProcessed)
}
// 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
}
domainToCheck.Set(newDomainsToCheck)
}
if keepDomain {
newDomains = append(newDomains, domainToCheck)
}
}
p.Domains = newDomains
}
func (p *Provider) watchCertificate() {
p.certsChan = make(chan *Certificate)
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.Domain) {
domainsCertificate.Certificate = cert.Certificate
domainsCertificate.Key = cert.Key
certUpdated = true
break
}
}
if !certUpdated {
p.certificates = append(p.certificates, cert)
}
err := p.saveCertificates()
if err != nil {
log.Error(err)
}
case <-stop:
return
}
}
})
}
func (p *Provider) saveCertificates() error {
err := p.Store.SaveCertificates(p.certificates)
p.refreshCertificates()
return err
}
func (p *Provider) refreshCertificates() {
config := types.ConfigMessage{
ProviderName: "ACME",
Configuration: &types.Configuration{
Backends: map[string]*types.Backend{},
Frontends: map[string]*types.Frontend{},
TLS: []*traefiktls.Configuration{},
},
}
for _, cert := range p.certificates {
cert := &traefiktls.Certificate{CertFile: traefiktls.FileOrContent(cert.Certificate), KeyFile: traefiktls.FileOrContent(cert.Key)}
config.Configuration.TLS = append(config.Configuration.TLS, &traefiktls.Configuration{Certificate: cert, EntryPoints: []string{p.EntryPoint}})
}
p.configurationChan <- config
}
func (p *Provider) renewCertificates() {
log.Info("Testing certificate renew...")
for _, cert := range p.certificates {
crt, err := getX509Certificate(cert)
// 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 {
log.Infof("Error renewing certificate from LE : %+v, %v", cert.Domain, err)
continue
}
log.Infof("Renewing certificate from LE : %+v", cert.Domain)
renewedCert, err := client.Certificate.Renew(certificate.Resource{
Domain: cert.Domain.Main,
PrivateKey: cert.Key,
Certificate: cert.Certificate,
}, true, OSCPMustStaple)
if err != nil {
log.Errorf("Error renewing certificate from LE: %v, %v", cert.Domain, err)
continue
}
if len(renewedCert.Certificate) == 0 || len(renewedCert.PrivateKey) == 0 {
log.Errorf("domains %v renew certificate with no value: %v", cert.Domain.ToStrArray(), cert)
continue
}
p.addCertificateForDomain(cert.Domain, renewedCert.Certificate, renewedCert.PrivateKey)
}
}
}
// Get provided certificate which check a domains list (Main and SANs)
// from static and dynamic provided certificates
func (p *Provider) getUncheckedDomains(domainsToCheck []string, checkConfigurationDomains bool) []string {
p.resolvingDomainsMutex.RLock()
defer p.resolvingDomainsMutex.RUnlock()
log.Debugf("Looking for provided certificate(s) to validate %q...", domainsToCheck)
allDomains := p.certificateStore.GetAllDomains()
// Get ACME certificates
for _, cert := range p.certificates {
allDomains = append(allDomains, strings.Join(cert.Domain.ToStrArray(), ","))
}
// Get currently resolved domains
for domain := range p.resolvingDomains {
allDomains = append(allDomains, domain)
}
// Get Configuration Domains
if checkConfigurationDomains {
for i := 0; i < len(p.Domains); i++ {
allDomains = append(allDomains, strings.Join(p.Domains[i].ToStrArray(), ","))
}
}
return searchUncheckedDomains(domainsToCheck, allDomains)
}
func searchUncheckedDomains(domainsToCheck []string, existentDomains []string) []string {
var uncheckedDomains []string
for _, domainToCheck := range domainsToCheck {
if !isDomainAlreadyChecked(domainToCheck, existentDomains) {
uncheckedDomains = append(uncheckedDomains, domainToCheck)
}
}
if len(uncheckedDomains) == 0 {
log.Debugf("No ACME certificate generation required for domains %q.", domainsToCheck)
} else {
log.Debugf("Domains %q need ACME certificates generation for domains %q.", domainsToCheck, strings.Join(uncheckedDomains, ","))
}
return uncheckedDomains
}
func getX509Certificate(cert *Certificate) (*x509.Certificate, error) {
tlsCert, err := tls.X509KeyPair(cert.Certificate, cert.Key)
if err != nil {
log.Errorf("Failed to load TLS keypair from ACME certificate for domain %q (SAN : %q), certificate will be renewed : %v", cert.Domain.Main, strings.Join(cert.Domain.SANs, ","), err)
return nil, err
}
crt := tlsCert.Leaf
if crt == nil {
crt, err = x509.ParseCertificate(tlsCert.Certificate[0])
if err != nil {
log.Errorf("Failed to parse TLS keypair from ACME certificate for domain %q (SAN : %q), certificate will be renewed : %v", cert.Domain.Main, strings.Join(cert.Domain.SANs, ","), err)
}
}
return crt, err
}
// getValidDomains checks if given domain is allowed to generate a ACME certificate and return it
func (p *Provider) getValidDomains(domain types.Domain, wildcardAllowed bool) ([]string, error) {
domains := domain.ToStrArray()
if len(domains) == 0 {
return nil, errors.New("unable to generate a certificate in ACME provider when no domain is given")
}
if strings.HasPrefix(domain.Main, "*") {
if !wildcardAllowed {
return nil, fmt.Errorf("unable to generate a wildcard certificate in ACME provider for domain %q from a 'Host' rule", strings.Join(domains, ","))
}
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, ","))
}
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, ","))
}
}
for _, san := range domain.SANs {
if strings.HasPrefix(san, "*") {
return nil, fmt.Errorf("unable to generate a certificate in ACME provider for domains %q: SAN %q can not be a wildcard domain", strings.Join(domains, ","), san)
}
}
var cleanDomains []string
for _, domain := range domains {
canonicalDomain := types.CanonicalDomain(domain)
cleanDomain := dns01.UnFqdn(canonicalDomain)
if canonicalDomain != cleanDomain {
log.Warnf("FQDN detected, please remove the trailing dot: %s", canonicalDomain)
}
cleanDomains = append(cleanDomains, cleanDomain)
}
return cleanDomains, nil
}
func isDomainAlreadyChecked(domainToCheck string, existentDomains []string) bool {
for _, certDomains := range existentDomains {
for _, certDomain := range strings.Split(certDomains, ",") {
if types.MatchDomain(domainToCheck, certDomain) {
return true
}
}
}
return false
}