221 lines
6.2 KiB
Go
221 lines
6.2 KiB
Go
package tls
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import (
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"crypto/tls"
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"crypto/x509"
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"fmt"
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"sync"
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"github.com/containous/traefik/pkg/log"
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"github.com/containous/traefik/pkg/tls/generate"
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"github.com/containous/traefik/pkg/types"
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"github.com/go-acme/lego/challenge/tlsalpn01"
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"github.com/sirupsen/logrus"
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)
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// Manager is the TLS option/store/configuration factory
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type Manager struct {
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storesConfig map[string]Store
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stores map[string]*CertificateStore
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configs map[string]Options
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certs []*CertAndStores
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TLSAlpnGetter func(string) (*tls.Certificate, error)
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lock sync.RWMutex
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}
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// NewManager creates a new Manager
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func NewManager() *Manager {
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return &Manager{}
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}
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// UpdateConfigs updates the TLS* configuration options
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func (m *Manager) UpdateConfigs(stores map[string]Store, configs map[string]Options, certs []*CertAndStores) {
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m.lock.Lock()
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defer m.lock.Unlock()
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m.configs = configs
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m.storesConfig = stores
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m.certs = certs
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m.stores = make(map[string]*CertificateStore)
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for storeName, storeConfig := range m.storesConfig {
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store, err := buildCertificateStore(storeConfig)
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if err != nil {
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log.Errorf("Error while creating certificate store %s: %v", storeName, err)
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continue
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}
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m.stores[storeName] = store
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}
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storesCertificates := make(map[string]map[string]*tls.Certificate)
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for _, conf := range certs {
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if len(conf.Stores) == 0 {
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if log.GetLevel() >= logrus.DebugLevel {
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log.Debugf("No store is defined to add the certificate %s, it will be added to the default store.",
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conf.Certificate.GetTruncatedCertificateName())
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}
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conf.Stores = []string{"default"}
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}
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for _, store := range conf.Stores {
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if err := conf.Certificate.AppendCertificate(storesCertificates, store); err != nil {
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log.Errorf("Unable to append certificate %s to store %s: %v", conf.Certificate.GetTruncatedCertificateName(), store, err)
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}
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}
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}
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for storeName, certs := range storesCertificates {
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m.getStore(storeName).DynamicCerts.Set(certs)
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}
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}
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// Get gets the TLS configuration to use for a given store / configuration
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func (m *Manager) Get(storeName string, configName string) (*tls.Config, error) {
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m.lock.RLock()
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defer m.lock.RUnlock()
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config, ok := m.configs[configName]
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if !ok {
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return nil, fmt.Errorf("unknown TLS options: %s", configName)
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}
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store := m.getStore(storeName)
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tlsConfig, err := buildTLSConfig(config)
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if err != nil {
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log.Error(err)
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tlsConfig = &tls.Config{}
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}
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tlsConfig.GetCertificate = func(clientHello *tls.ClientHelloInfo) (*tls.Certificate, error) {
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domainToCheck := types.CanonicalDomain(clientHello.ServerName)
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if m.TLSAlpnGetter != nil {
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cert, err := m.TLSAlpnGetter(domainToCheck)
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if err != nil {
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return nil, err
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}
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if cert != nil {
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return cert, nil
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}
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}
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bestCertificate := store.GetBestCertificate(clientHello)
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if bestCertificate != nil {
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return bestCertificate, nil
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}
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if m.configs[configName].SniStrict {
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return nil, fmt.Errorf("strict SNI enabled - No certificate found for domain: %q, closing connection", domainToCheck)
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}
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log.WithoutContext().Debugf("Serving default certificate for request: %q", domainToCheck)
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return store.DefaultCertificate, nil
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}
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return tlsConfig, nil
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}
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func (m *Manager) getStore(storeName string) *CertificateStore {
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_, ok := m.stores[storeName]
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if !ok {
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m.stores[storeName], _ = buildCertificateStore(Store{})
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}
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return m.stores[storeName]
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}
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// GetStore gets the certificate store of a given name
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func (m *Manager) GetStore(storeName string) *CertificateStore {
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m.lock.RLock()
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defer m.lock.RUnlock()
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return m.getStore(storeName)
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}
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func buildCertificateStore(tlsStore Store) (*CertificateStore, error) {
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certificateStore := NewCertificateStore()
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certificateStore.DynamicCerts.Set(make(map[string]*tls.Certificate))
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if tlsStore.DefaultCertificate != nil {
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cert, err := buildDefaultCertificate(tlsStore.DefaultCertificate)
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if err != nil {
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return certificateStore, err
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}
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certificateStore.DefaultCertificate = cert
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} else {
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log.Debug("No default certificate, generate one")
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cert, err := generate.DefaultCertificate()
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if err != nil {
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return certificateStore, err
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}
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certificateStore.DefaultCertificate = cert
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}
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return certificateStore, nil
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}
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// creates a TLS config that allows terminating HTTPS for multiple domains using SNI
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func buildTLSConfig(tlsOption Options) (*tls.Config, error) {
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conf := &tls.Config{}
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// ensure http2 enabled
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conf.NextProtos = []string{"h2", "http/1.1", tlsalpn01.ACMETLS1Protocol}
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if len(tlsOption.ClientCA.Files) > 0 {
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pool := x509.NewCertPool()
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for _, caFile := range tlsOption.ClientCA.Files {
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data, err := caFile.Read()
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if err != nil {
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return nil, err
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}
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ok := pool.AppendCertsFromPEM(data)
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if !ok {
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return nil, fmt.Errorf("invalid certificate(s) in %s", caFile)
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}
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}
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conf.ClientCAs = pool
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if tlsOption.ClientCA.Optional {
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conf.ClientAuth = tls.VerifyClientCertIfGiven
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} else {
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conf.ClientAuth = tls.RequireAndVerifyClientCert
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}
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}
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// Set the minimum TLS version if set in the config TOML
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if minConst, exists := MinVersion[tlsOption.MinVersion]; exists {
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conf.PreferServerCipherSuites = true
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conf.MinVersion = minConst
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}
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// Set the list of CipherSuites if set in the config TOML
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if tlsOption.CipherSuites != nil {
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// if our list of CipherSuites is defined in the entryPoint config, we can re-initialize the suites list as empty
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conf.CipherSuites = make([]uint16, 0)
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for _, cipher := range tlsOption.CipherSuites {
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if cipherConst, exists := CipherSuites[cipher]; exists {
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conf.CipherSuites = append(conf.CipherSuites, cipherConst)
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} else {
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// CipherSuite listed in the toml does not exist in our listed
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return nil, fmt.Errorf("invalid CipherSuite: %s", cipher)
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}
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}
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}
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return conf, nil
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}
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func buildDefaultCertificate(defaultCertificate *Certificate) (*tls.Certificate, error) {
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certFile, err := defaultCertificate.CertFile.Read()
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if err != nil {
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return nil, fmt.Errorf("failed to get cert file content: %v", err)
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}
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keyFile, err := defaultCertificate.KeyFile.Read()
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if err != nil {
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return nil, fmt.Errorf("failed to get key file content: %v", err)
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}
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cert, err := tls.X509KeyPair(certFile, keyFile)
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if err != nil {
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return nil, fmt.Errorf("failed to load X509 key pair: %v", err)
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}
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return &cert, nil
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}
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