tor.go (2205B)
1 // Copyright (c) 2017-2021 Ivan Jelincic <parazyd@dyne.org> 2 // 3 // This file is part of tordam 4 // 5 // This program is free software: you can redistribute it and/or modify 6 // it under the terms of the GNU Affero General Public License as published by 7 // the Free Software Foundation, either version 3 of the License, or 8 // (at your option) any later version. 9 // 10 // This program is distributed in the hope that it will be useful, 11 // but WITHOUT ANY WARRANTY; without even the implied warranty of 12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 // GNU Affero General Public License for more details. 14 // 15 // You should have received a copy of the GNU Affero General Public License 16 // along with this program. If not, see <https://www.gnu.org/licenses/>. 17 18 package tordam 19 20 import ( 21 "fmt" 22 "net" 23 "os" 24 "os/exec" 25 "strings" 26 ) 27 28 // newtorrc returns a torrc string that is fed as standard input to the Tor 29 // binary for its configuration. 30 func newtorrc(listener, torlistener *net.TCPAddr, portmap []string) string { 31 var pm []string 32 33 for _, i := range pm { 34 p := strings.Split(i, ":") 35 pm = append(pm, fmt.Sprintf("HiddenServicePort %s %s", 36 p[0], strings.Join([]string{"127.0.0.1", p[1]}, ":"))) 37 } 38 39 return fmt.Sprintf(` 40 Log warn syslog 41 RunAsDaemon 0 42 DataDirectory tor 43 SocksPort %s 44 HiddenServiceDir hs 45 HiddenServicePort %d %s 46 %s 47 `, torlistener.String(), 48 listener.Port, listener.String(), strings.Join(pm, "\n")) 49 } 50 51 // SpawnTor runs the system's Tor binary with the torrc created by newtorrc. 52 // It takes listener (which is the local JSON-RPC server net.TCPAddr), 53 // portmap (to map HiddenServicePort entries) and datadir (to store Tor files) 54 // as parameters. Returns exec.Cmd pointer and/or error. 55 func SpawnTor(listener *net.TCPAddr, portmap []string, datadir string) (*exec.Cmd, error) { 56 var err error 57 58 if err = ValidatePortmap(portmap); err != nil { 59 return nil, err 60 } 61 62 Cfg.TorAddr, err = GetAvailableListener() 63 if err != nil { 64 return nil, err 65 } 66 67 if err := os.MkdirAll(datadir, 0700); err != nil { 68 return nil, err 69 } 70 71 cmd := exec.Command("tor", "-f", "-") 72 cmd.Stdin = strings.NewReader(newtorrc(listener, Cfg.TorAddr, portmap)) 73 cmd.Dir = datadir 74 return cmd, cmd.Start() 75 }