[feat] pure go bitmask vpn implemenation

- Resolves: #42

1 files changed, 98 insertions, 0 deletions

diff --git a/bitmask_go/vpn.go b/bitmask_go/vpn.go
new file mode 100644
index 0000000..09adcf0
--- /dev/null
+++ b/bitmask_go/vpn.go
@@ -0,0 +1,98 @@
+// 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 (
+	"path"
+)
+
+const (
+	openvpnManagementAddr = "127.0.0.1"
+	openvpnManagementPort = "6061"
+)
+
+var gateways = []string{
+	"5.79.86.180",
+	"199.58.81.145",
+	"198.252.153.28",
+}
+
+// StartVPN for provider
+func (b *Bitmask) StartVPN(provider string) error {
+	// TODO: openvpn args are hardcoded
+	err := firewallStart(gateways)
+	if err != nil {
+		return err
+	}
+
+	arg := []string{"--nobind", "--verb", "1"}
+	for _, gw := range gateways {
+		arg = append(arg, "--remote", gw, "443", "tcp4")
+	}
+	certPemPath := b.getCertPemPath()
+	arg = append(arg, "--client", "--tls-client", "--remote-cert-tls", "server", "--tls-cipher", "DHE-RSA-AES128-SHA", "--cipher", "AES-128-CBC", "--tun-ipv6", "--auth", "SHA1", "--keepalive", "10 30", "--management-client", "--management", openvpnManagementAddr+" "+openvpnManagementPort, "--ca", b.getCaCertPath(), "--cert", certPemPath, "--key", certPemPath)
+	return openvpnStart(arg...)
+}
+
+// StopVPN or cancel
+func (b *Bitmask) StopVPN() error {
+	err := firewallStop()
+	if err != nil {
+		return err
+	}
+	return openvpnStop()
+}
+
+// GetStatus returns the VPN status
+func (b *Bitmask) GetStatus() (string, error) {
+	status, err := b.getOpenvpnState()
+	if err != nil {
+		status = Off
+	}
+	return status, nil
+}
+
+// InstallHelpers into the system
+func (b *Bitmask) InstallHelpers() error {
+	// TODO
+	return nil
+}
+
+// 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) {
+	// TODO
+	return true, true, nil
+}
+
+// ListGateways return the names of the gateways
+func (b *Bitmask) ListGateways(provider string) ([]string, error) {
+	// TODO
+	return []string{}, nil
+}
+
+// UseGateway selects name as the default gateway
+func (b *Bitmask) UseGateway(name string) error {
+	// TODO
+	return nil
+}
+
+func (b *Bitmask) getCertPemPath() string {
+	return path.Join(b.tempdir, "openvpn.pem")
+}
+
+func (b *Bitmask) getCaCertPath() string {
+	return path.Join(b.tempdir, "cacert.pem")
+}