sadonion.go

package main

import (
	"fmt"
	"os"
	"golang.org/x/net/proxy"
	"strings"
	"strconv"
)

var services = map[string]string {
	"22"	:	"SSH Server",
	"23"	:	"Telnet Server",
	"25"	:	"SMTP Server",
	"53"	:	"DNS Server",
	"70"	:	"Gopher Server",
	"80"	:	"HTTP Server",
	"110"	:	"POP3 Server",
	"143"	:	"IMAP Server",
	"443"	:	"HTTPS Server",
	"465"	:	"SSL SMTP Server",
	"587" 	:	"STARTTLS SMTP Server",
	"995"	:	"SSL POP3 Server",
}

const (
	TOR_ADDR = "127.0.0.1:9050"
)

func oErr() {
	fmt.Fprintln(os.Stderr, os.Args[1], " is not a valid hidden service address.")
	os.Exit(1)
}

func main() {
	if len(os.Args) < 2 {
		fmt.Fprintln(os.Stderr, "usage: sadonion <dot onion address>")
		os.Exit(1)
	}

	if len(os.Args[1]) != 22 {
		oErr()
	}

	if strings.HasSuffix(os.Args[1], ".onion") == false {
		oErr()
	}

	dialer, err := proxy.SOCKS5("tcp", TOR_ADDR, nil, proxy.Direct)

	if err != nil {
		fmt.Fprintln(os.Stderr, "can't connect to Tor SOCKS5 proxy: ", err)
		os.Exit(1)
	}

	for x := 1; x < 1000; x++ {
		strport := strconv.Itoa(x)
		conn, dialerr := dialer.Dial("tcp", os.Args[1]  + ":" + strport)

		if dialerr == nil {
			defer conn.Close()

			if services[strport] == "" {
				fmt.Println("Port ", strport, " (unknown) ", "is live!")
			} else {
				fmt.Println("Port ", strport, " (" + services[strport] + ")", " is live!")
			}
		}

	}
}