initial tlsserver working

tlsserver.go

@@ -0,0 +1,79 @@
+package main
+
+import (
+	"crypto/tls"
+	"log"
+	"net"
+	"flag"
+	"fmt"
+	"os"
+	"os/exec"
+)
+
+var (
+	cfile = flag.String("cert", "cert.pem", "Certificate file in PEM format")
+	kfile = flag.String("key", "key.pem", "Key file in PEM format")
+	port = flag.Int("port", 1234, "Port to bind to")
+	args []string
+	nargs int
+)
+
+func main() {
+
+	flag.Parse()
+	 args = flag.Args()
+	nargs = flag.NArg()
+	if nargs < 1 {
+		fmt.Println("Usage: tlsserver [options] cmd [flags for cmd]")
+		fmt.Println("options:")
+		flag.PrintDefaults()
+		os.Exit(1)
+	}
+
+	// setup certs etc. for TLS-socket
+	tconf := new(tls.Config)
+	cert, err := tls.LoadX509KeyPair(*cfile, *kfile)
+	if err != nil {
+		fmt.Println("error with certs:", err)
+		os.Exit(2)
+	}
+
+	tconf.Certificates = append(tconf.Certificates, cert)
+	tconf.BuildNameToCertificate()
+
+	// start listening
+	sport := fmt.Sprintf(":%d", *port)
+	sock, err := tls.Listen("tcp", sport , tconf)
+	if err != nil {
+		fmt.Println("error with tcp-socket:", err)
+		os.Exit(3)
+	}
+	defer sock.Close()
+
+	// accept-loop
+	for {
+		conn, err := sock.Accept()
+		if err != nil {
+			log.Println("error during Accept()", err)
+			continue
+		}
+		log.Println("Got connection:", conn.RemoteAddr())
+		go handleConnection(conn)
+	}
+}
+
+func handleConnection(conn net.Conn) {
+	defer conn.Close()
+
+	// setup cmd
+	cmd := exec.Command(args[0])
+	cmd.Args = args
+	cmd.Stdin = conn
+	cmd.Stdout = conn
+	cmd.Stderr = os.Stderr
+	err := cmd.Run()
+	if err != nil {
+		log.Println(err)
+	}
+	log.Println("Done with connection", conn.RemoteAddr())
+}