Load certificate at startup

cert.go

@@ -3,9 +3,11 @@ package main
 import (
 	"crypto/rand"
 	"crypto/rsa"
+	"crypto/tls"
 	"crypto/x509"
 	"crypto/x509/pkix"
 	"encoding/pem"
+	"log"
 	"math/big"
 	"os"
 	"time"
@@ -50,3 +52,16 @@ func generateCertificate() error {
 	pem.Encode(keyOut, &pem.Block{Type: "RSA PRIVATE KEY", Bytes: x509.MarshalPKCS1PrivateKey(priv)})
 	return nil
 }
+
+func loadCertificate() {
+	cert, err := tls.LoadX509KeyPair(Config.Cert, Config.Key)
+	if err != nil {
+		log.Fatal(err)
+	} else {
+		LoadedCert = cert
+	}
+}
+
+var (
+	LoadedCert tls.Certificate
+)

proxy.go

@@ -22,7 +22,7 @@ func fileExists(filename string) bool {
 
 func customTLSWrap(conn net.Conn, sni string) (*utls.UConn, error) {
 	clientHelloID := utls.ClientHelloID{
-		Config.TLSClient, Config.TLSVersion, nil, nil,
+		Client: Config.TLSClient, Version: Config.TLSVersion, Seed: nil, Weights: nil,
 	}
 
 	uTLSConn := utls.UClient(
@@ -86,14 +86,9 @@ func connect(sni string, destConn net.Conn, clientConn net.Conn) {
 		return
 	}
 
-	cert, err := tls.LoadX509KeyPair(Config.Cert, Config.Key)
-	if err != nil {
-		log.Fatal(err)
-	}
-
 	config := &tls.Config{
 		InsecureSkipVerify: true,
-		Certificates:       []tls.Certificate{cert},
+		Certificates:       []tls.Certificate{LoadedCert},
 	}
 
 	state := destTLSConn.ConnectionState()
@@ -172,6 +167,8 @@ func main() {
 		generateCertificate()
 	}
 
+	loadCertificate()
+
 	server := &http.Server{
 		Addr: Config.Addr + ":" + Config.Port,
 		Handler: http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {