Merge pull request 'Generate Torrc and Integration test for Launching Tor with Generated Torrc' (#9) from authenticator into master
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the build was successful
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commit
6f2a158504
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@ -35,6 +35,15 @@ pipeline:
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- ./tmp/tor -f ./testing/torrc
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- sleep 15
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- sh testing/tests.sh
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- pkill -9 tor
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integration-tests:
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when:
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repo: openprivacy/connectivity
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branch: master
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event: [ push, pull_request ]
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image: golang
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commands:
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- go test -race -v ./testing/launch_tor_integration_test.go
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notify-email:
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image: drillster/drone-email
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host: build.openprivacy.ca
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@ -0,0 +1,31 @@
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package testing
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import (
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"git.openprivacy.ca/openprivacy/connectivity/tor"
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"git.openprivacy.ca/openprivacy/log"
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"os"
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"path"
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"testing"
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)
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func TestLaunchTor(t *testing.T) {
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log.SetLevel(log.LevelDebug)
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// Create the tor data directory if it doesn't already exist..
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os.MkdirAll("../tmp/data/tor", 0700)
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err := tor.GenerateTorrc("examplehashedpassword", "../tmp/data/tor/torrc")
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if err != nil {
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t.Fatalf("failed to create torrc file: %v", err)
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}
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// Get the current working director, clean the paths to remove relative references
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wd, _ := os.Getwd()
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t.Logf("Launching bundled tor at %v", path.Clean(wd+"/../tmp/tor"))
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acn, err := tor.NewTorACNWithAuth(path.Clean(wd+"/../tmp/data"), path.Clean(wd+"/../tmp/tor"), 9051, tor.HashedPasswordAuthenticator{Password: "examplehashedpassword"})
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if err != nil {
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t.Fatalf("tor failed to start: %v", err)
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}
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acn.WaitTillBootstrapped()
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t.Log("we have bootstrapped!")
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acn.Close()
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}
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@ -3,6 +3,7 @@ package tor
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import (
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"context"
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"errors"
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"fmt"
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"git.openprivacy.ca/openprivacy/connectivity"
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"git.openprivacy.ca/openprivacy/log"
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"github.com/cretz/bine/control"
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@ -269,7 +270,6 @@ func startTor(appDirectory string, bundledTorPath string, controlPort int, authe
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controlport, err := dialControlPort(tp.controlPort)
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if err == nil {
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// TODO: configurable auth
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err := authenticator.Authenticate(controlport)
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if err == nil {
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log.Debugln("connected to control port")
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@ -282,10 +282,17 @@ func startTor(appDirectory string, bundledTorPath string, controlPort int, authe
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controlport.Close()
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}
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}
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log.Debugf("launching system tor\n")
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// check if the torrc file is present where expected
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if _, err := os.Stat(path.Join(dataDir, "torrc")); os.IsNotExist(err) {
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log.Debugf("torrc file does not exist at %v", path.Join(dataDir, "torrc"))
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return nil, fmt.Errorf("torrc file does not exist at %v", path.Join(dataDir, "torrc"))
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}
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// if not, try running system tor
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if checkCmdlineTorVersion("tor") {
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t, err := tor.Start(nil, &tor.StartConf{EnableNetwork: true, DataDir: dataDir, DebugWriter: nil, ProcessCreator: newHideCmd("tor")})
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t, err := tor.Start(nil, &tor.StartConf{EnableNetwork: true, DataDir: dataDir, TorrcFile: path.Join(dataDir, "torrc"), DebugWriter: nil, ProcessCreator: newHideCmd("tor")})
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if err == nil {
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tp.t = t
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return tp, nil
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@ -293,10 +300,11 @@ func startTor(appDirectory string, bundledTorPath string, controlPort int, authe
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log.Debugf("Error connecting to self-run system tor: %v\n", err)
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}
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log.Debugf("launching bundled tor\n")
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// try running bundledTor
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if bundledTorPath != "" && checkCmdlineTorVersion(bundledTorPath) {
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log.Debugln("using bundled tor '" + bundledTorPath + "'")
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t, err := tor.Start(nil, &tor.StartConf{EnableNetwork: true, DataDir: dataDir, ExePath: bundledTorPath, DebugWriter: nil, ProcessCreator: newHideCmd(bundledTorPath)})
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t, err := tor.Start(nil, &tor.StartConf{EnableNetwork: true, DataDir: dataDir, TorrcFile: path.Join(dataDir, "torrc"), ExePath: bundledTorPath, DebugWriter: nil, ProcessCreator: newHideCmd(bundledTorPath)})
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if err != nil {
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log.Debugf("Error running bundled tor: %v\n", err)
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}
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@ -1,11 +1,17 @@
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package tor
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import (
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"crypto/rand"
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"crypto/sha1"
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"encoding/base32"
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"encoding/hex"
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"errors"
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"fmt"
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"github.com/cretz/bine/control"
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"golang.org/x/crypto/ed25519"
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"golang.org/x/crypto/sha3"
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"io"
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"io/ioutil"
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"strings"
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)
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@ -60,17 +66,17 @@ type Authenticator interface {
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// HashedPasswordAuthenticator authenticates to a Tor control port using a hashed password.
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// Note: This method is vulnerable to replay attacks by the host system (but so is cookie auth)
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type HashedPasswordAuthenticator struct {
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password string
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Password string
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}
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// Authenticate uses the given hashed password to authenticate to the control port
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func (h HashedPasswordAuthenticator) Authenticate(controlport *control.Conn) error {
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return controlport.Authenticate(h.password)
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return controlport.Authenticate(h.Password)
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}
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// NewHashedPasswordAuthenticator creates a new hashed password authenticator
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func NewHashedPasswordAuthenticator(password string) Authenticator {
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return HashedPasswordAuthenticator{password: password}
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return HashedPasswordAuthenticator{Password: password}
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}
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// NullAuthenticator exists to force always authenticating to a system tor.
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@ -81,3 +87,39 @@ type NullAuthenticator struct {
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func (n NullAuthenticator) Authenticate(controlport *control.Conn) error {
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return errors.New("null authenticator provided, this control port is unsafe, start a new tor process instead")
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}
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// GenerateHashedPassword calculates a hash in the same waay tha tor --hash-password does
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// this function takes a salt as input which is not great from an api-misuse perspective, but
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// we make it private.
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func generateHashedPassword(salt [8]byte, password string) string {
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c := 96
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count := (16 + (c & 15)) << ((c >> 4) + 6)
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tmp := append(salt[:], []byte(password)...)
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slen := len(tmp)
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d := sha1.New()
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for count != 0 {
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if count > slen {
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d.Write(tmp)
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count -= slen
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} else {
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d.Write(tmp[:count])
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count = 0
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}
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}
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hashed := d.Sum([]byte{})
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return fmt.Sprintf("16:%s%s%s", strings.ToUpper(hex.EncodeToString(salt[:])),
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strings.ToUpper(hex.EncodeToString([]byte{byte(c)})),
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strings.ToUpper(hex.EncodeToString(hashed)))
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}
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// GenerateTorrc generates a Tor config file with the control port bieng guarded by a hash of the given
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// password.
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func GenerateTorrc(password string, path string) error {
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var salt [8]byte
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if _, err := io.ReadFull(rand.Reader, salt[:]); err != nil {
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return err
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}
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hashedpassword := generateHashedPassword(salt, password)
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contents := fmt.Sprintf("SOCKSPort 9050\nControlPort 9051\nHashedControlPassword %s", hashedpassword)
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return ioutil.WriteFile(path, []byte(contents), 0600)
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}
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@ -0,0 +1,23 @@
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package tor
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import (
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"os"
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"testing"
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)
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func TestGenerateHashedPassword(t *testing.T) {
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// 16:C15305F97789414B601259E3EC5E76B8E55FC56A9F562B713F3D2BA257
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hp := generateHashedPassword([8]byte{0xC1, 0x53, 0x05, 0xF9, 0x77, 0x89, 0x41, 0x4B}, "examplehashedpassword")
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if hp != "16:C15305F97789414B601259E3EC5E76B8E55FC56A9F562B713F3D2BA257" {
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t.Fatalf("hashed passwords do not match. Expected %s, got %s", "16:C15305F97789414B601259E3EC5E76B8E55FC56A9F562B713F3D2BA257", hp)
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}
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}
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func TestGenerateTorrc(t *testing.T) {
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path := "./torrc.test"
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err := GenerateTorrc("examplehashedpassword", path)
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if err != nil {
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t.Errorf("Torrc file could not be written")
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}
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os.Remove(path)
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}
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