Exemplo n.º 1
0
func main() {
	flag.Parse()

	oldState, err := terminal.MakeRaw(0)
	if err != nil {
		panic(err.Error())
	}
	defer terminal.Restore(0, oldState)
	term := terminal.NewTerminal(os.Stdin, "> ")
	if width, height, err := terminal.GetSize(0); err == nil {
		term.SetSize(width, height)
	}

	if len(*configFile) == 0 {
		homeDir := os.Getenv("HOME")
		if len(homeDir) == 0 {
			homeDir = "/"
		}
		*configFile = homeDir + "/.xmpp-client"
	}

	config, err := ParseConfig(*configFile)
	if err != nil {
		alert(term, "Failed to parse config file: "+err.Error())
		config = new(Config)
		if !enroll(config, term) {
			return
		}
		config.filename = *configFile
		config.Save()
	}

	password := config.Password
	if len(password) == 0 {
		if password, err = term.ReadPassword(fmt.Sprintf("Password for %s (will not be saved to disk): ", config.Account)); err != nil {
			alert(term, "Failed to read password: "******"@", 2)
	if len(parts) != 2 {
		alert(term, "invalid username (want user@domain): "+config.Account)
		return
	}
	user := parts[0]
	domain := parts[1]

	var addr string
	if len(config.Server) > 0 && config.Port > 0 {
		addr = fmt.Sprintf("%s:%d", config.Server, config.Port)
	} else {
		if len(config.Proxies) > 0 {
			alert(term, "Cannot connect via a proxy without Server and Port being set in the config file as an SRV lookup would leak information.")
			return
		}
		host, port, err := xmpp.Resolve(domain)
		if err != nil {
			alert(term, "Failed to resolve XMPP server: "+err.Error())
			return
		}
		addr = fmt.Sprintf("%s:%d", host, port)
	}

	var dialer proxy.Dialer
	for i := len(config.Proxies) - 1; i >= 0; i-- {
		u, err := url.Parse(config.Proxies[i])
		if err != nil {
			alert(term, "Failed to parse "+config.Proxies[i]+" as a URL: "+err.Error())
			return
		}
		if dialer == nil {
			dialer = proxy.Direct
		}
		if dialer, err = proxy.FromURL(u, dialer); err != nil {
			alert(term, "Failed to parse "+config.Proxies[i]+" as a proxy: "+err.Error())
			return
		}
	}

	xmppConfig := &xmpp.Config{
		Log:    &lineLogger{term, nil},
		Create: *createAccount,
	}

	if len(config.RawLogFile) > 0 {
		rawLog, err := os.OpenFile(config.RawLogFile, os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0600)
		if err != nil {
			alert(term, "Failed to open raw log file: "+err.Error())
			return
		}

		lock := new(sync.Mutex)
		in := rawLogger{
			out:    rawLog,
			prefix: []byte("<- "),
			lock:   lock,
		}
		out := rawLogger{
			out:    rawLog,
			prefix: []byte("-> "),
			lock:   lock,
		}
		in.other, out.other = &out, &in

		xmppConfig.InLog = &in
		xmppConfig.OutLog = &out

		defer in.flush()
		defer out.flush()
	}

	if dialer != nil {
		info(term, "Making connection to "+addr+" via proxy")
		if xmppConfig.Conn, err = dialer.Dial("tcp", addr); err != nil {
			alert(term, "Failed to connect via proxy: "+err.Error())
			return
		}
	}

	conn, err := xmpp.Dial(addr, user, domain, password, xmppConfig)
	if err != nil {
		alert(term, "Failed to connect to XMPP server: "+err.Error())
		return
	}

	s := Session{
		account:           config.Account,
		conn:              conn,
		term:              term,
		conversations:     make(map[string]*otr.Conversation),
		knownStates:       make(map[string]string),
		privateKey:        new(otr.PrivateKey),
		config:            config,
		pendingRosterChan: make(chan *rosterEdit),
		pendingSubscribes: make(map[string]string),
		lastActionTime:    time.Now(),
	}
	info(term, "Fetching roster")

	//var rosterReply chan xmpp.Stanza
	rosterReply, _, err := s.conn.RequestRoster()
	if err != nil {
		alert(term, "Failed to request roster: "+err.Error())
		return
	}

	conn.SignalPresence("")

	s.input = Input{
		term:        term,
		uidComplete: new(priorityList),
	}
	commandChan := make(chan interface{})
	go s.input.ProcessCommands(commandChan)

	stanzaChan := make(chan xmpp.Stanza)
	go s.readMessages(stanzaChan)

	s.privateKey.Parse(config.PrivateKey)
	s.timeouts = make(map[xmpp.Cookie]time.Time)

	ticker := time.NewTicker(1 * time.Second)

MainLoop:
	for {
		select {
		case now := <-ticker.C:
			haveExpired := false
			for _, expiry := range s.timeouts {
				if now.After(expiry) {
					haveExpired = true
					break
				}
			}
			if !haveExpired {
				continue
			}

			newTimeouts := make(map[xmpp.Cookie]time.Time)
			for cookie, expiry := range s.timeouts {
				if now.After(expiry) {
					s.conn.Cancel(cookie)
				} else {
					newTimeouts[cookie] = expiry
				}
			}
			s.timeouts = newTimeouts

		case edit := <-s.pendingRosterChan:
			if !edit.isComplete {
				info(s.term, "Please edit "+edit.fileName+" and run /rostereditdone when complete")
				s.pendingRosterEdit = edit
				continue
			}
			if s.processEditedRoster(edit) {
				s.pendingRosterEdit = nil
			} else {
				alert(s.term, "Please reedit file and run /rostereditdone again")
			}

		case rosterStanza, ok := <-rosterReply:
			if !ok {
				alert(s.term, "Failed to read roster: "+err.Error())
				return
			}
			if s.roster, err = xmpp.ParseRoster(rosterStanza); err != nil {
				alert(s.term, "Failed to parse roster: "+err.Error())
				return
			}
			for _, entry := range s.roster {
				s.input.AddUser(entry.Jid)
			}
			info(s.term, "Roster received")

		case cmd, ok := <-commandChan:
			if !ok {
				warn(term, "Exiting because command channel closed")
				break MainLoop
			}
			s.lastActionTime = time.Now()
			switch cmd := cmd.(type) {
			case quitCommand:
				break MainLoop
			case versionCommand:
				replyChan, cookie, err := s.conn.SendIQ(cmd.User, "get", xmpp.VersionQuery{})
				if err != nil {
					alert(s.term, "Error sending version request: "+err.Error())
					continue
				}
				s.timeouts[cookie] = time.Now().Add(5 * time.Second)
				go s.awaitVersionReply(replyChan, cmd.User)
			case rosterCommand:
				info(s.term, "Current roster:")
				maxLen := 0
				for _, item := range s.roster {
					if maxLen < len(item.Jid) {
						maxLen = len(item.Jid)
					}
				}

				for _, item := range s.roster {
					line := "  "
					line += item.Jid
					numSpaces := 1 + (maxLen - len(item.Jid))
					for i := 0; i < numSpaces; i++ {
						line += " "
					}
					line += item.Subscription + "\t" + item.Name
					if state, ok := s.knownStates[item.Jid]; ok {
						line += "\t" + state
					}
					info(s.term, line)
				}
			case rosterEditCommand:
				if s.pendingRosterEdit != nil {
					warn(s.term, "Aborting previous roster edit")
					s.pendingRosterEdit = nil
				}
				rosterCopy := make([]xmpp.RosterEntry, len(s.roster))
				copy(rosterCopy, s.roster)
				go s.editRoster(rosterCopy)
			case rosterEditDoneCommand:
				if s.pendingRosterEdit == nil {
					warn(s.term, "No roster edit in progress. Use /rosteredit to start one")
					continue
				}
				go s.loadEditedRoster(*s.pendingRosterEdit)
			case confirmCommand:
				s.handleConfirmOrDeny(cmd.User, true /* confirm */)
			case denyCommand:
				s.handleConfirmOrDeny(cmd.User, false /* deny */)
			case addCommand:
				s.conn.SendPresence(cmd.User, "subscribe", "" /* generate id */)
			case msgCommand:
				conversation, ok := s.conversations[cmd.to]
				var msgs [][]byte
				if ok {
					var err error
					msgs, err = conversation.Send([]byte(cmd.msg))
					if err != nil {
						alert(s.term, err.Error())
						break
					}
				} else {
					msgs = [][]byte{[]byte(cmd.msg)}
				}

				for _, msg := range msgs {
					s.conn.Send(cmd.to, string(msg))
				}
			case otrCommand:
				s.conn.Send(string(cmd.User), string(otr.QueryMessage))
			case authQACommand:
				to := string(cmd.User)
				conversation, ok := s.conversations[to]
				if !ok {
					alert(s.term, "Can't authenticate without a secure conversation established")
					break
				}
				msgs, err := conversation.Authenticate(cmd.Question, []byte(cmd.Secret))
				if err != nil {
					alert(s.term, "Error while starting authentication with "+to+": "+err.Error())
				}
				for _, msg := range msgs {
					s.conn.Send(to, string(msg))
				}
			}
		case rawStanza, ok := <-stanzaChan:
			if !ok {
				warn(term, "Exiting because channel to server closed")
				break MainLoop
			}
			switch stanza := rawStanza.Value.(type) {
			case *xmpp.ClientMessage:
				s.processClientMessage(stanza)
			case *xmpp.ClientPresence:
				s.processPresence(stanza)
			case *xmpp.ClientIQ:
				if stanza.Type != "get" && stanza.Type != "set" {
					continue
				}
				reply := s.processIQ(stanza)
				if reply == nil {
					reply = xmpp.ErrorReply{
						Type:  "cancel",
						Error: xmpp.ErrorBadRequest{},
					}
				}
				if err := s.conn.SendIQReply(stanza.From, "result", stanza.Id, reply); err != nil {
					alert(term, "Failed to send IQ message: "+err.Error())
				}
			default:
				info(term, fmt.Sprintf("%s %s", rawStanza.Name, rawStanza.Value))
			}
		}
	}

	os.Stdout.Write([]byte("\n"))
}
Exemplo n.º 2
0
func enroll(config *Config, term *terminal.Terminal) bool {
	var err error
	warn(term, "Enrolling new config file")

	var domain string
	for {
		term.SetPrompt("Account (i.e. [email protected], enter to quit): ")
		if config.Account, err = term.ReadLine(); err != nil || len(config.Account) == 0 {
			return false
		}

		parts := strings.SplitN(config.Account, "@", 2)
		if len(parts) != 2 {
			alert(term, "invalid username (want user@domain): "+config.Account)
			continue
		}
		domain = parts[1]
		break
	}

	var proxyStr string
	term.SetPrompt("Proxy (i.e socks5://127.0.0.1:9050, enter for none): ")

	for {
		if proxyStr, err = term.ReadLine(); err != nil {
			return false
		}
		if len(proxyStr) == 0 {
			break
		}
		u, err := url.Parse(proxyStr)
		if err != nil {
			alert(term, "Failed to parse "+proxyStr+" as a URL: "+err.Error())
			continue
		}
		if _, err = proxy.FromURL(u, proxy.Direct); err != nil {
			alert(term, "Failed to parse "+proxyStr+" as a proxy: "+err.Error())
			continue
		}
		break
	}

	if len(proxyStr) > 0 {
		config.Proxies = []string{proxyStr}

		info(term, "Since you selected a proxy, we need to know the server and port to connect to as a SRV lookup would leak information every time.")
		term.SetPrompt("Server (i.e. xmpp.example.com, enter to lookup using unproxied DNS): ")
		if config.Server, err = term.ReadLine(); err != nil {
			return false
		}
		if len(config.Server) == 0 {
			var port uint16
			info(term, "Performing SRV lookup")
			if config.Server, port, err = xmpp.Resolve(domain); err != nil {
				alert(term, "SRV lookup failed: "+err.Error())
				return false
			}
			config.Port = int(port)
			info(term, "Resolved "+config.Server+":"+strconv.Itoa(config.Port))
		} else {
			for {
				term.SetPrompt("Port (enter for 5222): ")
				portStr, err := term.ReadLine()
				if err != nil {
					return false
				}
				if len(portStr) == 0 {
					portStr = "5222"
				}
				if config.Port, err = strconv.Atoi(portStr); err != nil || config.Port <= 0 || config.Port > 65535 {
					info(term, "Port numbers must be 0 < port <= 65535")
					continue
				}
				break
			}
		}
	}

	term.SetPrompt("File to import libotr private key from (enter to generate): ")

	var priv otr.PrivateKey
	for {
		importFile, err := term.ReadLine()
		if err != nil {
			return false
		}
		if len(importFile) > 0 {
			privKeyBytes, err := ioutil.ReadFile(importFile)
			if err != nil {
				alert(term, "Failed to open private key file: "+err.Error())
				continue
			}

			if !priv.Import(privKeyBytes) {
				alert(term, "Failed to parse libotr private key file (the parser is pretty simple I'm afraid)")
				continue
			}
			break
		} else {
			info(term, "Generating private key...")
			priv.Generate(rand.Reader)
			break
		}
	}
	config.PrivateKey = priv.Serialize(nil)

	term.SetPrompt("> ")

	return true
}