141 lines
3.5 KiB
Go
141 lines
3.5 KiB
Go
package tls
|
|
|
|
import (
|
|
"crypto/tls"
|
|
"crypto/x509"
|
|
"net"
|
|
"sort"
|
|
"strings"
|
|
"time"
|
|
|
|
"github.com/containous/traefik/log"
|
|
"github.com/containous/traefik/safe"
|
|
"github.com/patrickmn/go-cache"
|
|
)
|
|
|
|
// CertificateStore store for dynamic and static certificates
|
|
type CertificateStore struct {
|
|
DynamicCerts *safe.Safe
|
|
DefaultCertificate *tls.Certificate
|
|
CertCache *cache.Cache
|
|
SniStrict bool
|
|
}
|
|
|
|
// NewCertificateStore create a store for dynamic and static certificates
|
|
func NewCertificateStore() *CertificateStore {
|
|
return &CertificateStore{
|
|
DynamicCerts: &safe.Safe{},
|
|
CertCache: cache.New(1*time.Hour, 10*time.Minute),
|
|
}
|
|
}
|
|
|
|
func (c CertificateStore) getDefaultCertificateDomains() []string {
|
|
var allCerts []string
|
|
|
|
if c.DefaultCertificate == nil {
|
|
return allCerts
|
|
}
|
|
|
|
x509Cert, err := x509.ParseCertificate(c.DefaultCertificate.Certificate[0])
|
|
if err != nil {
|
|
log.WithoutContext().Errorf("Could not parse default certicate: %v", err)
|
|
return allCerts
|
|
}
|
|
|
|
if len(x509Cert.Subject.CommonName) > 0 {
|
|
allCerts = append(allCerts, x509Cert.Subject.CommonName)
|
|
}
|
|
|
|
allCerts = append(allCerts, x509Cert.DNSNames...)
|
|
|
|
for _, ipSan := range x509Cert.IPAddresses {
|
|
allCerts = append(allCerts, ipSan.String())
|
|
}
|
|
|
|
return allCerts
|
|
}
|
|
|
|
// GetAllDomains return a slice with all the certificate domain
|
|
func (c CertificateStore) GetAllDomains() []string {
|
|
|
|
allCerts := c.getDefaultCertificateDomains()
|
|
|
|
// Get dynamic certificates
|
|
if c.DynamicCerts != nil && c.DynamicCerts.Get() != nil {
|
|
for domains := range c.DynamicCerts.Get().(map[string]*tls.Certificate) {
|
|
allCerts = append(allCerts, domains)
|
|
}
|
|
}
|
|
return allCerts
|
|
}
|
|
|
|
// GetBestCertificate returns the best match certificate, and caches the response
|
|
func (c CertificateStore) GetBestCertificate(clientHello *tls.ClientHelloInfo) *tls.Certificate {
|
|
domainToCheck := strings.ToLower(strings.TrimSpace(clientHello.ServerName))
|
|
if len(domainToCheck) == 0 {
|
|
// If no ServerName is provided, Check for local IP address matches
|
|
host, _, err := net.SplitHostPort(clientHello.Conn.LocalAddr().String())
|
|
if err != nil {
|
|
log.Debugf("Could not split host/port: %v", err)
|
|
}
|
|
domainToCheck = strings.TrimSpace(host)
|
|
}
|
|
|
|
if cert, ok := c.CertCache.Get(domainToCheck); ok {
|
|
return cert.(*tls.Certificate)
|
|
}
|
|
|
|
matchedCerts := map[string]*tls.Certificate{}
|
|
if c.DynamicCerts != nil && c.DynamicCerts.Get() != nil {
|
|
for domains, cert := range c.DynamicCerts.Get().(map[string]*tls.Certificate) {
|
|
for _, certDomain := range strings.Split(domains, ",") {
|
|
if MatchDomain(domainToCheck, certDomain) {
|
|
matchedCerts[certDomain] = cert
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if len(matchedCerts) > 0 {
|
|
// sort map by keys
|
|
keys := make([]string, 0, len(matchedCerts))
|
|
for k := range matchedCerts {
|
|
keys = append(keys, k)
|
|
}
|
|
sort.Strings(keys)
|
|
|
|
// cache best match
|
|
c.CertCache.SetDefault(domainToCheck, matchedCerts[keys[len(keys)-1]])
|
|
return matchedCerts[keys[len(keys)-1]]
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// ResetCache clears the cache in the store
|
|
func (c CertificateStore) ResetCache() {
|
|
if c.CertCache != nil {
|
|
c.CertCache.Flush()
|
|
}
|
|
}
|
|
|
|
// MatchDomain return true if a domain match the cert domain
|
|
func MatchDomain(domain string, certDomain string) bool {
|
|
if domain == certDomain {
|
|
return true
|
|
}
|
|
|
|
for len(certDomain) > 0 && certDomain[len(certDomain)-1] == '.' {
|
|
certDomain = certDomain[:len(certDomain)-1]
|
|
}
|
|
|
|
labels := strings.Split(domain, ".")
|
|
for i := range labels {
|
|
labels[i] = "*"
|
|
candidate := strings.Join(labels, ".")
|
|
if certDomain == candidate {
|
|
return true
|
|
}
|
|
}
|
|
return false
|
|
}
|