traefik/acme/challengeProvider.go
2017-02-03 09:46:27 +01:00

97 lines
2.4 KiB
Go

package acme
import (
"crypto/tls"
"fmt"
"strings"
"sync"
"time"
"github.com/cenk/backoff"
"github.com/containous/traefik/cluster"
"github.com/containous/traefik/log"
"github.com/containous/traefik/safe"
"github.com/xenolf/lego/acme"
)
var _ acme.ChallengeProviderTimeout = (*challengeProvider)(nil)
type challengeProvider struct {
store cluster.Store
lock sync.RWMutex
}
func (c *challengeProvider) getCertificate(domain string) (cert *tls.Certificate, exists bool) {
log.Debugf("Challenge GetCertificate %s", domain)
if !strings.HasSuffix(domain, ".acme.invalid") {
return nil, false
}
c.lock.RLock()
defer c.lock.RUnlock()
account := c.store.Get().(*Account)
if account.ChallengeCerts == nil {
return nil, false
}
account.Init()
var result *tls.Certificate
operation := func() error {
for _, cert := range account.ChallengeCerts {
for _, dns := range cert.certificate.Leaf.DNSNames {
if domain == dns {
result = cert.certificate
return nil
}
}
}
return fmt.Errorf("Cannot find challenge cert for domain %s", domain)
}
notify := func(err error, time time.Duration) {
log.Errorf("Error getting cert: %v, retrying in %s", err, time)
}
ebo := backoff.NewExponentialBackOff()
ebo.MaxElapsedTime = 60 * time.Second
err := backoff.RetryNotify(safe.OperationWithRecover(operation), ebo, notify)
if err != nil {
log.Errorf("Error getting cert: %v", err)
return nil, false
}
return result, true
}
func (c *challengeProvider) Present(domain, token, keyAuth string) error {
log.Debugf("Challenge Present %s", domain)
cert, _, err := TLSSNI01ChallengeCert(keyAuth)
if err != nil {
return err
}
c.lock.Lock()
defer c.lock.Unlock()
transaction, object, err := c.store.Begin()
if err != nil {
return err
}
account := object.(*Account)
if account.ChallengeCerts == nil {
account.ChallengeCerts = map[string]*ChallengeCert{}
}
account.ChallengeCerts[domain] = &cert
return transaction.Commit(account)
}
func (c *challengeProvider) CleanUp(domain, token, keyAuth string) error {
log.Debugf("Challenge CleanUp %s", domain)
c.lock.Lock()
defer c.lock.Unlock()
transaction, object, err := c.store.Begin()
if err != nil {
return err
}
account := object.(*Account)
delete(account.ChallengeCerts, domain)
return transaction.Commit(account)
}
func (c *challengeProvider) Timeout() (timeout, interval time.Duration) {
return 60 * time.Second, 5 * time.Second
}