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authentik/internal/web/tls.go

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package web
import (
"crypto/tls"
"net"
"github.com/pires/go-proxyproto"
"goauthentik.io/internal/config"
"goauthentik.io/internal/crypto"
"goauthentik.io/internal/utils/web"
)
func (ws *WebServer) GetCertificate() func(ch *tls.ClientHelloInfo) (*tls.Certificate, error) {
cert, err := crypto.GenerateSelfSignedCert()
if err != nil {
ws.log.WithError(err).Error("failed to generate default cert")
}
return func(ch *tls.ClientHelloInfo) (*tls.Certificate, error) {
if ch.ServerName == "" {
return &cert, nil
}
if ws.ProxyServer != nil {
appCert := ws.ProxyServer.GetCertificate(ch.ServerName)
if appCert != nil {
return appCert, nil
}
}
if ws.TenantTLS != nil {
return ws.TenantTLS.GetCertificate(ch)
}
ws.log.Trace("using default, self-signed certificate")
return &cert, nil
}
}
// ServeHTTPS constructs a net.Listener and starts handling HTTPS requests
func (ws *WebServer) listenTLS() {
tlsConfig := &tls.Config{
MinVersion: tls.VersionTLS12,
MaxVersion: tls.VersionTLS12,
GetCertificate: ws.GetCertificate(),
}
ln, err := net.Listen("tcp", config.Get().Web.ListenTLS)
if err != nil {
ws.log.WithError(err).Fatalf("failed to listen (TLS)")
return
}
proxyListener := &proxyproto.Listener{Listener: web.TCPKeepAliveListener{TCPListener: ln.(*net.TCPListener)}}
defer proxyListener.Close()
tlsListener := tls.NewListener(proxyListener, tlsConfig)
ws.log.WithField("listen", config.Get().Web.ListenTLS).Info("Starting HTTPS server")
ws.serve(tlsListener)
ws.log.WithField("listen", config.Get().Web.ListenTLS).Info("Stopping HTTPS server")
}