132 lines
3 KiB
Go
132 lines
3 KiB
Go
package acme
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import (
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"crypto/tls"
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"fmt"
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"strings"
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"sync"
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"time"
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"github.com/cenkalti/backoff"
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"github.com/containous/traefik/log"
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"github.com/containous/traefik/old/cluster"
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"github.com/containous/traefik/safe"
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"github.com/go-acme/lego/challenge"
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"github.com/go-acme/lego/challenge/tlsalpn01"
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)
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var _ challenge.ProviderTimeout = (*challengeTLSProvider)(nil)
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type challengeTLSProvider struct {
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store cluster.Store
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lock sync.RWMutex
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}
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func (c *challengeTLSProvider) getCertificate(domain string) (cert *tls.Certificate, exists bool) {
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log.Debugf("Looking for an existing ACME challenge for %s...", domain)
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if !strings.HasSuffix(domain, ".acme.invalid") {
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return nil, false
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}
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c.lock.RLock()
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defer c.lock.RUnlock()
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account := c.store.Get().(*Account)
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if account.ChallengeCerts == nil {
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return nil, false
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}
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err := account.Init()
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if err != nil {
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log.Errorf("Unable to init ACME Account: %v", err)
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return nil, false
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}
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var result *tls.Certificate
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operation := func() error {
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for _, cert := range account.ChallengeCerts {
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for _, dns := range cert.certificate.Leaf.DNSNames {
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if domain == dns {
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result = cert.certificate
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return nil
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}
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}
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}
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return fmt.Errorf("cannot find challenge cert for domain %s", domain)
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}
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notify := func(err error, time time.Duration) {
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log.Errorf("Error getting cert: %v, retrying in %s", err, time)
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}
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ebo := backoff.NewExponentialBackOff()
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ebo.MaxElapsedTime = 60 * time.Second
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err = backoff.RetryNotify(safe.OperationWithRecover(operation), ebo, notify)
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if err != nil {
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log.Errorf("Error getting cert: %v", err)
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return nil, false
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}
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return result, true
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}
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func (c *challengeTLSProvider) Present(domain, token, keyAuth string) error {
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log.Debugf("Challenge Present %s", domain)
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cert, err := tlsALPN01ChallengeCert(domain, keyAuth)
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if err != nil {
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return err
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}
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c.lock.Lock()
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defer c.lock.Unlock()
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transaction, object, err := c.store.Begin()
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if err != nil {
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return err
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}
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account := object.(*Account)
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if account.ChallengeCerts == nil {
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account.ChallengeCerts = map[string]*ChallengeCert{}
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}
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account.ChallengeCerts[domain] = cert
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return transaction.Commit(account)
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}
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func (c *challengeTLSProvider) CleanUp(domain, token, keyAuth string) error {
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log.Debugf("Challenge CleanUp %s", domain)
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c.lock.Lock()
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defer c.lock.Unlock()
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transaction, object, err := c.store.Begin()
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if err != nil {
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return err
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}
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account := object.(*Account)
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delete(account.ChallengeCerts, domain)
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return transaction.Commit(account)
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}
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func (c *challengeTLSProvider) Timeout() (timeout, interval time.Duration) {
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return 60 * time.Second, 5 * time.Second
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}
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func tlsALPN01ChallengeCert(domain, keyAuth string) (*ChallengeCert, error) {
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tempCertPEM, rsaPrivPEM, err := tlsalpn01.ChallengeBlocks(domain, keyAuth)
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if err != nil {
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return nil, err
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}
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certificate, err := tls.X509KeyPair(tempCertPEM, rsaPrivPEM)
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if err != nil {
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return nil, err
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}
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return &ChallengeCert{Certificate: tempCertPEM, PrivateKey: rsaPrivPEM, certificate: &certificate}, nil
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}
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