[feat] pure go bitmask vpn implemenation

- Resolves: #42

3 files changed, 305 insertions, 0 deletions

diff --git a/bitmaskd/events.go b/bitmaskd/events.go
new file mode 100644
index 0000000..e97804c
--- /dev/null
+++ b/bitmaskd/events.go
@@ -0,0 +1,50 @@
+// Copyright (C) 2018 LEAP
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package bitmask
+
+import (
+	"log"
+	"net/http"
+)
+
+const (
+	statusEvent = "VPN_STATUS_CHANGED"
+)
+
+func (b *Bitmask) eventsHandler() {
+	b.send("events", "register", statusEvent)
+	client := &http.Client{
+		Timeout: 0,
+	}
+	for {
+		resJSON, err := send(b.apiToken, client, "events", "poll")
+		res, ok := resJSON.([]interface{})
+		if err != nil || !ok || len(res) < 1 {
+			continue
+		}
+		event, ok := res[0].(string)
+		if !ok || event != statusEvent {
+			continue
+		}
+
+		status, err := b.GetStatus()
+		if err != nil {
+			log.Printf("Error receiving status: %v", err)
+			continue
+		}
+		b.statusCh <- status
+	}
+}
diff --git a/bitmaskd/main.go b/bitmaskd/main.go
new file mode 100644
index 0000000..2ff2268
--- /dev/null
+++ b/bitmaskd/main.go
@@ -0,0 +1,163 @@
+// Copyright (C) 2018 LEAP
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package bitmask
+
+import (
+	"bytes"
+	"encoding/json"
+	"errors"
+	"io/ioutil"
+	"log"
+	"net/http"
+	"path"
+	"time"
+
+	"0xacab.org/leap/bitmask-systray/bitmask"
+)
+
+const (
+	timeout    = time.Second * 15
+	url        = "http://localhost:7070/API/"
+	headerAuth = "X-Bitmask-Auth"
+)
+
+// Bitmask holds the bitmask client data
+type Bitmask struct {
+	client   *http.Client
+	apiToken string
+	statusCh chan string
+}
+
+// Init the connection to bitmask
+func Init() (*Bitmask, error) {
+	statusCh := make(chan string)
+	client := &http.Client{
+		Timeout: timeout,
+	}
+
+	err := waitForBitmaskd()
+	if err != nil {
+		return nil, err
+	}
+
+	apiToken, err := getToken()
+	if err != nil {
+		return nil, err
+	}
+
+	b := Bitmask{client, apiToken, statusCh}
+	go b.eventsHandler()
+	return &b, nil
+}
+
+// GetStatusCh returns a channel that will recieve VPN status changes
+func (b *Bitmask) GetStatusCh() <-chan string {
+	return b.statusCh
+}
+
+// Close the connection to bitmask
+func (b *Bitmask) Close() {
+	_, err := b.send("core", "stop")
+	if err != nil {
+		log.Printf("Got an error stopping bitmaskd: %v", err)
+	}
+}
+
+// Version gets the bitmask version string
+func (b *Bitmask) Version() (string, error) {
+	res, err := b.send("core", "version")
+	if err != nil {
+		return "", err
+	}
+	return res["version_core"].(string), nil
+}
+
+func waitForBitmaskd() error {
+	var err error
+	for i := 0; i < 30; i++ {
+		resp, err := http.Post(url, "", nil)
+		if err == nil {
+			resp.Body.Close()
+			return nil
+		}
+		log.Printf("Bitmask is not ready (iteration %d): %v", i, err)
+		time.Sleep(1 * time.Second)
+	}
+	return err
+}
+
+func (b *Bitmask) send(parts ...interface{}) (map[string]interface{}, error) {
+	resJSON, err := send(b.apiToken, b.client, parts...)
+	if err != nil {
+		return nil, err
+	}
+	result, ok := resJSON.(map[string]interface{})
+	if !ok {
+		return nil, errors.New("Not valid response")
+	}
+	return result, nil
+}
+
+func send(apiToken string, client *http.Client, parts ...interface{}) (interface{}, error) {
+	apiSection, _ := parts[0].(string)
+	reqBody, err := json.Marshal(parts[1:])
+	if err != nil {
+		return nil, err
+	}
+	req, err := http.NewRequest("POST", url+apiSection, bytes.NewReader(reqBody))
+	if err != nil {
+		return nil, err
+	}
+	req.Header.Add(headerAuth, apiToken)
+
+	resp, err := client.Do(req)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+
+	resJSON, err := ioutil.ReadAll(resp.Body)
+	if err != nil {
+		return nil, err
+	}
+	return parseResponse(resJSON)
+}
+
+func parseResponse(resJSON []byte) (interface{}, error) {
+	var response struct {
+		Result interface{}
+		Error  string
+	}
+	err := json.Unmarshal(resJSON, &response)
+	if response.Error != "" {
+		return nil, errors.New(response.Error)
+	}
+	return response.Result, err
+}
+
+func getToken() (string, error) {
+	var err error
+	path := path.Join(bitmask.ConfigPath, "authtoken")
+	for i := 0; i < 30; i++ {
+		b, err := ioutil.ReadFile(path)
+		if err == nil {
+			return string(b), nil
+		}
+		log.Printf("Auth token is not ready (iteration %d): %v", i, err)
+		time.Sleep(1 * time.Second)
+	}
+	return "", err
+}
diff --git a/bitmaskd/vpn.go b/bitmaskd/vpn.go
new file mode 100644
index 0000000..aee5e8f
--- /dev/null
+++ b/bitmaskd/vpn.go
@@ -0,0 +1,92 @@
+// Copyright (C) 2018 LEAP
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package bitmask
+
+import (
+	"errors"
+	"log"
+)
+
+// StartVPN for provider
+func (b *Bitmask) StartVPN(provider string) error {
+	_, err := b.send("vpn", "start", provider)
+	return err
+}
+
+// StopVPN or cancel
+func (b *Bitmask) StopVPN() error {
+	_, err := b.send("vpn", "stop")
+	return err
+}
+
+// GetStatus returns the VPN status
+func (b *Bitmask) GetStatus() (string, error) {
+	res, err := b.send("vpn", "status")
+	if err != nil {
+		return "", err
+	}
+	return res["status"].(string), nil
+}
+
+// InstallHelpers into the system
+func (b *Bitmask) InstallHelpers() error {
+	_, err := b.send("vpn", "install")
+	return err
+}
+
+// VPNCheck returns if the helpers are installed and up to date and if polkit is running
+func (b *Bitmask) VPNCheck() (helpers bool, priviledge bool, err error) {
+	res, err := b.send("vpn", "check", "")
+	if err != nil {
+		return false, false, err
+	}
+	installed, ok := res["installed"].(bool)
+	if !ok {
+		log.Printf("Unexpected value for installed on 'vpn check': %v", res)
+		return false, false, errors.New("Invalid response format")
+	}
+	privcheck, ok := res["privcheck"].(bool)
+	if !ok {
+		log.Printf("Unexpected value for privcheck on 'vpn check': %v", res)
+		return installed, false, errors.New("Invalid response format")
+	}
+	return installed, privcheck, nil
+}
+
+// ListGateways return the names of the gateways
+func (b *Bitmask) ListGateways(provider string) ([]string, error) {
+	res, err := b.send("vpn", "list")
+	if err != nil {
+		return nil, err
+	}
+
+	names := []string{}
+	locations, ok := res[provider].([]interface{})
+	if !ok {
+		return nil, errors.New("Can't read the locations for provider " + provider)
+	}
+	for i := range locations {
+		loc := locations[i].(map[string]interface{})
+		names = append(names, loc["name"].(string))
+	}
+	return names, nil
+}
+
+// UseGateway selects name as the default gateway
+func (b *Bitmask) UseGateway(name string) error {
+	_, err := b.send("vpn", "locations", name)
+	return err
+}