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package snowflake
import (
"context"
"crypto/tls"
"crypto/x509"
"fmt"
"io/ioutil"
"log"
"net/http"
"os"
"path/filepath"
"strconv"
"strings"
"time"
"0xacab.org/leap/bitmask-vpn/pkg/config"
"github.com/cretz/bine/tor"
)
// TODO
// [ ] fix snowflake-client binary
// [ ] find tor path
const torrc = `UseBridges 1
DataDirectory datadir
ClientTransportPlugin snowflake exec /usr/local/bin/snowflake-client -log /tmp/snowflake.log -url https://snowflake-broker.torproject.net.global.prod.fastly.net/ \
-front cdn.sstatic.net -ice stun:stun.voip.blackberry.com:3478,stun:stun.altar.com.pl:3478,stun:stun.antisip.com:3478,stun:stun.bluesip.net:3478,stun:stun.dus.net:3478,stun:stun.epygi.com:3478,stun:stun.sonetel.com:3478,stun:stun.sonetel.net:3478,stun:stun.stunprotocol.org:3478,stun:stun.uls.co.za:3478,stun:stun.voipgate.com:3478,stun:stun.voys.nl:3478 \
-max 5
Bridge snowflake 192.0.2.3:1
SocksPort auto`
type StatusEvent struct {
Progress int
Tag string
}
type StatusLogger struct {
ch chan *StatusEvent
}
func (e *StatusLogger) Write(p []byte) (n int, err error) {
raw := strings.Split(string(p), ":")
if len(raw) > 1 {
l := raw[1]
parts := strings.Split(string(l), " ")
if len(parts) > 2 && parts[2] == "STATUS_CLIENT" {
if parts[4] == "BOOTSTRAP" {
if len(parts) > 6 {
pr, _ := strconv.Atoi(parts[5][9:])
event := &StatusEvent{Progress: pr, Tag: parts[6][4:]}
go func() { e.ch <- event }()
}
fmt.Println()
}
}
}
return len(p), nil
}
func writeTorrc() string {
f, err := ioutil.TempFile("", "torrc-snowflake-")
if err != nil {
log.Println(err)
}
f.Write([]byte(torrc))
return f.Name()
}
// TODO pass provider api
func BootstrapWithSnowflakeProxies(provider string, api string, ch chan *StatusEvent) error {
rcfile := writeTorrc()
logger := &StatusLogger{ch}
conf := &tor.StartConf{
DebugWriter: logger,
TorrcFile: rcfile,
}
fmt.Println("Starting Tor and fetching files to bootstrap VPN tunnel...")
fmt.Println("")
t, err := tor.Start(nil, conf)
if err != nil {
return err
}
defer t.Close()
// Wait at most 5 minutes
dialCtx, dialCancel := context.WithTimeout(context.Background(), time.Minute*10)
defer dialCancel()
dialer, err := t.Dialer(dialCtx, nil)
if err != nil {
return err
}
/*
regClient := &http.Client{
Transport: &http.Transport{
DialContext: dialer.DialContext,
},
Timeout: time.Minute * 5,
}
*/
//fetchFile(regClient, "https://wtfismyip.com/json")
certs := x509.NewCertPool()
certs.AppendCertsFromPEM(config.CaCert)
apiClient := &http.Client{
Transport: &http.Transport{
TLSClientConfig: &tls.Config{
RootCAs: certs,
},
DialContext: dialer.DialContext,
},
Timeout: time.Minute * 5,
}
eipUri := "https://" + api + "/3/config/eip-service.json"
eipFile := filepath.Join(config.Path, provider+"-eip.json")
fetchFile(apiClient, eipUri, eipFile)
certUri := "https://" + api + "/3/cert"
certFile := filepath.Join(config.Path, provider+".pem")
fetchFile(apiClient, certUri, certFile)
return nil
}
func fetchFile(client *http.Client, uri string, file string) error {
resp, err := client.Get(uri)
if err != nil {
return err
}
defer resp.Body.Close()
c, err := ioutil.ReadAll(resp.Body)
if err != nil {
log.Println(err)
}
if os.Getenv("DEBUG") == "1" {
fmt.Println(string(c))
}
return ioutil.WriteFile(file, c, 0600)
}
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