Example #1
0
func TestEncryptFirstMessage(t *testing.T) {
	alice := "alice"
	bob := "bob"

	denameConfig, denameTeardown := denameTestutil.SingleServer(t)
	defer denameTeardown()

	aliceDnmc, err := denameClient.NewClient(denameConfig, nil, nil)
	bobDnmc, err := denameClient.NewClient(denameConfig, nil, nil)

	if err != nil {
		t.Fatal(err)
	}

	_, serverPubkey, serverAddr, serverTeardown := server.CreateTestServer(t)
	defer serverTeardown()

	aliceDir, err := ioutil.TempDir("", "daemon-alice")
	if err != nil {
		t.Fatal(err)
	}
	defer shred.RemoveAll(aliceDir)
	bobDir, err := ioutil.TempDir("", "daemon-bob")
	if err != nil {
		t.Fatal(err)
	}
	defer shred.RemoveAll(bobDir)

	aliceConf := &Daemon{
		Paths: persistence.Paths{
			RootDir:     aliceDir,
			Application: "daemon",
		},
		Now:                  time.Now,
		foreignDenameClient:  aliceDnmc,
		timelessDenameClient: aliceDnmc,
		inBuf:                make([]byte, proto.SERVER_MESSAGE_SIZE),
		outBuf:               make([]byte, proto.SERVER_MESSAGE_SIZE),
		LocalAccountConfig:   proto.LocalAccountConfig{},
		LocalAccount: proto.LocalAccount{
			Dename: alice,
		},
		cc: util.NewConnectionCache(util.NewAnonDialer("DANGEROUS_NO_TOR")),
	}

	bobConf := &Daemon{
		Paths: persistence.Paths{
			RootDir:     bobDir,
			Application: "daemon",
		},
		Now:                  time.Now,
		foreignDenameClient:  bobDnmc,
		timelessDenameClient: bobDnmc,
		inBuf:                make([]byte, proto.SERVER_MESSAGE_SIZE),
		outBuf:               make([]byte, proto.SERVER_MESSAGE_SIZE),
		LocalAccountConfig:   proto.LocalAccountConfig{},
		LocalAccount: proto.LocalAccount{
			Dename: bob,
		},
		cc: util.NewConnectionCache(util.NewAnonDialer("DANGEROUS_NO_TOR")),
	}

	aliceHomeConn := util.CreateTestAccount(alice, aliceDnmc, &aliceConf.LocalAccountConfig, serverAddr, serverPubkey, t)
	defer aliceHomeConn.Close()
	bobHomeConn := util.CreateTestAccount(bob, bobDnmc, &bobConf.LocalAccountConfig, serverAddr, serverPubkey, t)
	defer bobHomeConn.Close()

	//fmt.Printf("CBob: %v\n", ([32]byte)(bobConf.TransportSecretKeyForServer))
	aliceNotifies := make(chan *util.EnvelopeWithId)
	aliceReplies := make(chan *proto.ServerToClient)

	aliceConnToServer := &util.ConnectionToServer{
		InBuf:        aliceConf.inBuf,
		Conn:         aliceHomeConn,
		ReadReply:    aliceReplies,
		ReadEnvelope: aliceNotifies,
	}

	go aliceConnToServer.ReceiveMessages()

	bobNotifies := make(chan *util.EnvelopeWithId)
	bobReplies := make(chan *proto.ServerToClient)

	bobConnToServer := &util.ConnectionToServer{
		InBuf:        bobConf.inBuf,
		Conn:         bobHomeConn,
		ReadReply:    bobReplies,
		ReadEnvelope: bobNotifies,
	}

	go bobConnToServer.ReceiveMessages()

	if err := InitFs(aliceConf); err != nil {
		t.Fatal(err)
	}

	if err := InitFs(bobConf); err != nil {
		t.Fatal(err)
	}
	//Bob uploads keys
	bobPublicPrekeys, bobSecretPrekeys, err := GeneratePrekeys(maxPrekeys)
	var bobSigningKey [64]byte
	copy(bobSigningKey[:], bobConf.KeySigningSecretKey[:64])
	err = util.UploadKeys(bobConnToServer, util.SignKeys(bobPublicPrekeys, &bobSigningKey))
	if err != nil {
		t.Fatal(err)
	}

	//Bob enables notifications
	if err = util.EnablePush(bobConnToServer); err != nil {
		t.Fatal(err)
	}

	//Alice uploads keys
	alicePublicPrekeys, _, err := GeneratePrekeys(maxPrekeys)
	var aliceSigningKey [64]byte
	copy(aliceSigningKey[:], aliceConf.KeySigningSecretKey[:64])
	err = util.UploadKeys(aliceConnToServer, util.SignKeys(alicePublicPrekeys, &aliceSigningKey))
	if err != nil {
		t.Fatal(err)
	}

	//Alice enables notification
	if err = util.EnablePush(aliceConnToServer); err != nil {
		t.Fatal(err)
	}

	participants := make([]string, 0, 2)
	participants = append(participants, alice)
	participants = append(participants, bob)

	msg1 := []byte("Envelope")

	payload := proto.Message{
		Subject:      "Subject1",
		Participants: participants,
		Dename:       alice,
		Contents:     msg1,
	}
	envelope, err := payload.Marshal()
	if err != nil {
		t.Fatal(err)
	}

	err = aliceConf.sendFirstMessage(envelope, bob)
	if err != nil {
		t.Fatal(err)
	}
	incoming := <-bobConnToServer.ReadEnvelope

	out, bobRatch, _, err := bobConf.decryptFirstMessage(incoming.Envelope, bobPublicPrekeys, bobSecretPrekeys)
	if err != nil {
		t.Fatal(err)
	}

	fmt.Printf("Bob hears: %s\n", out)

	msg2 := []byte("Envelope2")
	payload2 := proto.Message{
		Subject:      "Subject3",
		Participants: participants,
		Dename:       bob,
		Contents:     msg2,
	}
	envelope2, err := payload2.Marshal()
	if err != nil {
		t.Fatal(err)
	}

	err = bobConf.sendMessage(envelope2, alice, bobRatch)
	if err != nil {
		t.Fatal(err)
	}

	incomingAlice := <-aliceConnToServer.ReadEnvelope

	aliceConf.fillAuth = util.FillAuthWith((*[32]byte)(&aliceConf.MessageAuthSecretKey))
	aliceConf.checkAuth = util.CheckAuthWith(aliceConf.ProfileRatchet)
	aliceRatchets, err := AllRatchets(aliceConf, aliceConf.fillAuth, aliceConf.checkAuth)
	outAlice, _, err := decryptMessage(incomingAlice.Envelope, aliceRatchets)
	if err != nil {
		t.Fatal(err)
	}

	ha := sha256.Sum256(incomingAlice.Envelope)
	if err := aliceConf.saveMessage(outAlice); err != nil {
		t.Fatal(err)
	}
	if err := util.DeleteMessages(aliceConnToServer, []*[32]byte{&ha}); err != nil {
		t.Fatal(err)
	}
	fmt.Printf("Alice hears: %s\n", outAlice)

	//TODO: Confirm message is as expected within the test
}
Example #2
0
// run executes the main loop of the chatterbox daemon
func (d *Daemon) run() error {
	profile := new(proto.Profile)
	if err := persistence.UnmarshalFromFile(d.OurChatterboxProfilePath(), profile); err != nil {
		return err
	}

	ourConn, err := d.cc.DialServer(d.Dename, d.ServerAddressTCP, int(d.ServerPortTCP),
		(*[32]byte)(&d.ServerTransportPK), (*[32]byte)(&profile.UserIDAtServer),
		(*[32]byte)(&d.TransportSecretKeyForServer))
	if err != nil {
		return err
	}
	defer ourConn.Close()

	notifies := make(chan *util.EnvelopeWithId)
	replies := make(chan *proto.ServerToClient)

	connToServer := &util.ConnectionToServer{
		InBuf:        d.inBuf,
		Conn:         ourConn,
		ReadReply:    replies,
		ReadEnvelope: notifies,
	}

	go connToServer.ReceiveMessages()

	prekeyPublics, prekeySecrets, err := d.updatePrekeys(connToServer)
	if err != nil {
		return err
	}

	watcher, err := fsnotify.NewWatcher()
	if err != nil {
		return err
	}
	defer watcher.Close()

	initFn := func(path string, f os.FileInfo, err error) error {
		if f.IsDir() {
			return d.processOutboxDir(path)
		}
		return d.processOutboxDir(filepath.Dir(path))
	}

	err = WatchDir(watcher, d.OutboxDir(), initFn)
	if err != nil {
		return err
	}

	if err = util.EnablePush(connToServer); err != nil {
		return err
	}

	d.requestAllMessages(connToServer)

	for {
		select {
		case <-d.stop:
			return nil
		case ev := <-watcher.Event:
			// event in the directory structure; watch any new directories
			if _, err = os.Stat(ev.Name); err == nil {
				err = WatchDir(watcher, ev.Name, initFn)
				if err != nil {
					log.Printf("watch %s: %s", ev.Name, err) // TODO
				}
				d.processOutboxDir(ev.Name)
			}
		case envelopewithid := <-connToServer.ReadEnvelope:
			envelope := envelopewithid.Envelope
			id := envelopewithid.Id
			msgHash := sha256.Sum256(envelope)
			// assume it's the first message we're receiving from the person; try to decrypt
			message, ratch, index, err := d.decryptFirstMessage(envelope, prekeyPublics, prekeySecrets)
			if err == nil {
				// assumption was correct, found a prekey that matched
				if err := StoreRatchet(d, message.Dename, ratch); err != nil {
					return err
				}

				newPrekeyPublics := append(prekeyPublics[:index], prekeyPublics[index+1:]...)
				newPrekeySecrets := append(prekeySecrets[:index], prekeySecrets[index+1:]...)
				if err = StorePrekeys(d, newPrekeyPublics, newPrekeySecrets); err != nil {
					return err
				}
				//TODO: Update prekeys by removing index, store // is this done? What does it mean?
				if err := d.saveMessage(message); err != nil {
					return err
				}
				if err := util.DeleteMessages(connToServer, []*[32]byte{id}); err != nil {
					return err
				}
			} else { // try decrypting with a ratchet
				ratchets, err := AllRatchets(d, d.fillAuth, d.checkAuth)
				if err != nil {
					return err
				}

				// TODO: figure out what here should be atomic and comment
				if message, ratch, err := decryptMessage(envelope, ratchets); err == nil {
					if err := d.saveMessage(message); err != nil {
						return err
					}
					if err := StoreRatchet(d, message.Dename, ratch); err != nil {
						return err
					}
				} else {
					log.Printf("failed to decrypt %x: %s", msgHash, err)
				}
				if err := util.DeleteMessages(connToServer, []*[32]byte{id}); err != nil {
					return err
				}
			}
		case err := <-watcher.Error:
			if err != nil {
				return err
			}
		}
	}

}