Created
January 11, 2021 09:11
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connect tls server with socks/https proxy
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| package main | |
| import ( | |
| "bufio" | |
| "bytes" | |
| "crypto/tls" | |
| "encoding/base64" | |
| "encoding/hex" | |
| "fmt" | |
| "log" | |
| "net" | |
| "net/http" | |
| "net/url" | |
| "strings" | |
| "time" | |
| "golang.org/x/net/proxy" | |
| ) | |
| func dialProxy(sproxy, hostport string) (net.Conn, error) { | |
| u, _ := url.Parse(sproxy) | |
| switch u.Scheme { | |
| case "socks5", "socks5h": | |
| var pass bool | |
| auth := new(proxy.Auth) | |
| auth.User = u.User.Username() | |
| auth.Password, pass = u.User.Password() | |
| if pass { | |
| dialer, _ := proxy.SOCKS5("tcp", u.Host, auth, proxy.Direct) | |
| return dialer.Dial("tcp", hostport) | |
| } | |
| dialer, _ := proxy.SOCKS5("tcp", u.Host, nil, proxy.Direct) | |
| return dialer.Dial("tcp", hostport) | |
| case "http", "https": | |
| username := u.User.Username() | |
| password, _ := u.User.Password() | |
| conn, err := net.Dial("tcp", u.Host) | |
| if err != nil { | |
| break | |
| } | |
| hdr := make(http.Header) | |
| if u.User.String() != "" { | |
| auth := username + ":" + password | |
| hdr.Set("Proxy-Authorization", "Basic "+base64.StdEncoding.EncodeToString([]byte(auth))) | |
| } | |
| connectReq := &http.Request{ | |
| Method: "CONNECT", | |
| URL: &url.URL{Opaque: hostport}, | |
| Host: hostport, | |
| Header: hdr, | |
| } | |
| if err = connectReq.Write(conn); err != nil { | |
| break | |
| } | |
| br := bufio.NewReader(conn) | |
| response, err := http.ReadResponse(br, connectReq) | |
| if err != nil || response == nil { | |
| log.Printf("http proxy connection error %v", err) | |
| break | |
| } | |
| if response.StatusCode != 200 { | |
| fmt.Printf("connect http tunnel faild: %d %+v", response.StatusCode, response) | |
| break | |
| } | |
| return conn, nil | |
| } | |
| return net.Dial("tcp", hostport) | |
| } | |
| func clientTLSConnWithProxy(proxy, hostport string) (*tls.Conn, error) { | |
| config := tls.Config{InsecureSkipVerify: true} | |
| var err error | |
| var conn net.Conn | |
| conn, err = dialProxy(proxy, hostport) | |
| if err != nil { | |
| log.Printf("error %v", err) | |
| return nil, err | |
| } | |
| tlsConn := tls.Client(conn, &config) | |
| err = tlsConn.Handshake() | |
| if err != nil { | |
| log.Printf("handshake failed %v", err) | |
| return nil, err | |
| } | |
| return tlsConn, nil | |
| } | |
| func unhex(hexStr string) []byte { | |
| hexStr = strings.ReplaceAll(hexStr, " ", "") | |
| hexStr = strings.ReplaceAll(hexStr, "\r", "") | |
| hexStr = strings.ReplaceAll(hexStr, "\n", "") | |
| hexStr = strings.ReplaceAll(hexStr, "\t", "") | |
| bytes, _ := hex.DecodeString(hexStr) | |
| return bytes | |
| } | |
| func main() { | |
| conn, err := clientTLSConnWithProxy("http://localhost:8888", "www.google.com:443") | |
| if err == nil { | |
| bin := unhex("474554202f20485454502f312e310d0a486f73743a2037342e3132352e3230302e3130310d0a557365722d4167656e743a206375726c2f372e36342e310d0a4163636570743a202a2f2a0d0a0d0a") | |
| _, err := conn.Write(bin) | |
| if err != nil { | |
| log.Printf("send http request error") | |
| } | |
| buf := new(bytes.Buffer) | |
| for { | |
| conn.SetReadDeadline(time.Now().Add(5 * time.Second)) | |
| p := make([]byte, 4096) | |
| c, err := conn.Read(p) | |
| if err != nil { | |
| break | |
| } | |
| buf.Write(p[:c]) | |
| } | |
| log.Printf("response text %s", buf.Bytes()) | |
| log.Printf("response hex %x", buf.Bytes()) | |
| } else { | |
| log.Fatalf("error tls connection failed %v", err) | |
| } | |
| } |
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