/
proxy.go
84 lines (69 loc) · 1.64 KB
/
proxy.go
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// tlsproxy - trivial tls proxy
//
// Copyright 2013 David du Colombier. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package main
import (
"crypto/tls"
"io"
"log"
"net"
)
type Proxy struct {
cert tls.Certificate
clientTls bool
serverTls bool
nextprotos []string
}
func copy(raddr io.WriteCloser, laddr io.Reader) {
defer raddr.Close()
io.Copy(raddr, laddr)
}
func (proxy Proxy) Listen(laddr string, raddr string) {
var err error
var local net.Listener
if proxy.serverTls {
config := &tls.Config{NextProtos: proxy.nextprotos, Certificates: []tls.Certificate{proxy.cert}}
local, err = tls.Listen("tcp", laddr, config)
} else {
local, err = net.Listen("tcp", laddr)
}
if err != nil {
log.Fatal("error: listen:", err)
}
for {
conn, err := local.Accept()
if err != nil {
log.Println("error: accept:", err)
}
go proxy.Serve(conn, raddr)
}
}
func (proxy Proxy) Serve(local net.Conn, raddr string) {
var err error
var remote net.Conn
if proxy.clientTls {
config := &tls.Config{NextProtos: proxy.nextprotos, InsecureSkipVerify: true}
remote, err = tls.Dial("tcp", raddr, config)
} else {
remote, err = net.Dial("tcp", raddr)
}
if err != nil {
log.Println("error: dial:", err)
return
}
go copy(local, remote)
go copy(remote, local)
}
func NewProxy(c bool, s bool, crt string, key string) *Proxy {
proxy := &Proxy{clientTls: c, serverTls: s}
if proxy.serverTls {
if cert, err := tls.LoadX509KeyPair(crt, key); err == nil {
proxy.cert = cert
} else {
log.Fatal("error: LoadX509KeyPair:", err)
}
}
return proxy
}