Add uTLS fingerprints support (#451)

transport/internet/tls/tls.go

@@ -3,6 +3,8 @@ package tls
 import (
 	"crypto/tls"
 
+	utls "github.com/refraction-networking/utls"
+
 	"github.com/xtls/xray-core/common/buf"
 	"github.com/xtls/xray-core/common/net"
 )
@@ -41,23 +43,24 @@ func Client(c net.Conn, config *tls.Config) net.Conn {
 	return &Conn{Conn: tlsConn}
 }
 
-/*
-func copyConfig(c *tls.Config) *utls.Config {
+var Fingerprints = map[string]utls.ClientHelloID{
+	"chrome":     utls.HelloChrome_Auto,
+	"firefox":    utls.HelloFirefox_Auto,
+	"safari":     utls.HelloIOS_Auto,
+	"randomized": utls.HelloRandomized,
+}
+
+func CopyConfig(c *tls.Config) *utls.Config {
 	return &utls.Config{
+		RootCAs:            c.RootCAs,
 		NextProtos:         c.NextProtos,
 		ServerName:         c.ServerName,
 		InsecureSkipVerify: c.InsecureSkipVerify,
-		MinVersion:         utls.VersionTLS12,
-		MaxVersion:         utls.VersionTLS12,
+		MinVersion:         c.MinVersion,
+		MaxVersion:         c.MaxVersion,
 	}
 }
 
-func UClient(c net.Conn, config *tls.Config) net.Conn {
-	uConfig := copyConfig(config)
-	return utls.Client(c, uConfig)
-}
-*/
-
 // Server initiates a TLS server handshake on the given connection.
 func Server(c net.Conn, config *tls.Config) net.Conn {
 	tlsConn := tls.Server(c, config)