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# -*- coding: utf-8 -*-
# darwin.py
# Copyright (C) 2013-2017 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/>.
"""
Darwin VPN launcher implementation.
"""
import commands
import getpass
import os
import sys
from twisted.logger import Logger
from leap.bitmask.vpn.launcher import VPNLauncher
from leap.bitmask.vpn.launcher import VPNLauncherException
from leap.bitmask.vpn.utils import get_path_prefix
logger = Logger()
class EIPNoTunKextLoaded(VPNLauncherException):
pass
class DarwinVPNLauncher(VPNLauncher):
"""
VPN launcher for the Darwin Platform
"""
COCOASUDO = "cocoasudo"
# XXX need the good old magic translate for these strings
# (look for magic in 0.2.0 release)
SUDO_MSG = ("Bitmask needs administrative privileges to run "
"Encrypted Internet.")
INSTALL_MSG = ("\"Bitmask needs administrative privileges to install "
"missing scripts and fix permissions.\"")
# Hardcode the installation path for OSX for security, openvpn is
# run as root
INSTALL_PATH = "/Applications/Bitmask.app/"
INSTALL_PATH_ESCAPED = os.path.realpath(os.getcwd() + "/../../")
OPENVPN_BIN = 'openvpn.leap'
OPENVPN_PATH = "%s/Contents/Resources/openvpn" % (INSTALL_PATH,)
OPENVPN_PATH_ESCAPED = "%s/Contents/Resources/openvpn" % (
INSTALL_PATH_ESCAPED,)
OPENVPN_BIN_PATH = "%s/Contents/Resources/%s" % (INSTALL_PATH,
OPENVPN_BIN)
UP_SCRIPT = "%s/client.up.sh" % (OPENVPN_PATH,)
DOWN_SCRIPT = "%s/client.down.sh" % (OPENVPN_PATH,)
OPENVPN_DOWN_PLUGIN = '%s/openvpn-down-root.so' % (OPENVPN_PATH,)
UPDOWN_FILES = (UP_SCRIPT, DOWN_SCRIPT, OPENVPN_DOWN_PLUGIN)
OTHER_FILES = []
@classmethod
def cmd_for_missing_scripts(kls, frompath):
"""
Returns a command that can copy the missing scripts.
:rtype: str
"""
to = kls.OPENVPN_PATH_ESCAPED
cmd = "#!/bin/sh\n"
cmd += "mkdir -p {0}\n".format(to)
cmd += "cp '{0}'/* {1}\n".format(frompath, to)
cmd += "chmod 744 {0}/*".format(to)
return cmd
@classmethod
def is_kext_loaded(kls):
"""
Checks if the needed kext is loaded before launching openvpn.
:returns: True if kext is loaded, False otherwise.
:rtype: bool
"""
return bool(commands.getoutput('kextstat | grep "leap.tun"'))
@classmethod
def _get_icon_path(kls):
"""
Returns the absolute path to the app icon.
:rtype: str
"""
resources_path = os.path.abspath(
os.path.join(os.getcwd(), "../../Contents/Resources"))
return os.path.join(resources_path, "bitmask.tiff")
@classmethod
def get_cocoasudo_ovpn_cmd(kls):
"""
Returns a string with the cocoasudo command needed to run openvpn
as admin with a nice password prompt. The actual command needs to be
appended.
:rtype: (str, list)
"""
# TODO add translation support for this
sudo_msg = ("Bitmask needs administrative privileges to run "
"Encrypted Internet.")
iconpath = kls._get_icon_path()
has_icon = os.path.isfile(iconpath)
args = ["--icon=%s" % iconpath] if has_icon else []
args.append("--prompt=%s" % (sudo_msg,))
return kls.COCOASUDO, args
@classmethod
def get_cocoasudo_installmissing_cmd(kls):
"""
Returns a string with the cocoasudo command needed to install missing
files as admin with a nice password prompt. The actual command needs to
be appended.
:rtype: (str, list)
"""
# TODO add translation support for this
install_msg = ('"Bitmask needs administrative privileges to install '
'missing scripts and fix permissions."')
iconpath = kls._get_icon_path()
has_icon = os.path.isfile(iconpath)
args = ["--icon=%s" % iconpath] if has_icon else []
args.append("--prompt=%s" % (install_msg,))
return kls.COCOASUDO, args
@classmethod
def get_vpn_command(kls, eipconfig, providerconfig, socket_host,
socket_port="unix", openvpn_verb=1):
"""
Returns the OSX implementation for the vpn launching command.
Might raise:
EIPNoTunKextLoaded,
OpenVPNNotFoundException,
VPNLauncherException.
:param eipconfig: eip configuration object
:type eipconfig: EIPConfig
:param providerconfig: provider specific configuration
:type providerconfig: ProviderConfig
:param socket_host: either socket path (unix) or socket IP
:type socket_host: str
:param socket_port: either string "unix" if it's a unix socket,
or port otherwise
:type socket_port: str
:param openvpn_verb: the openvpn verbosity wanted
:type openvpn_verb: int
:return: A VPN command ready to be launched.
:rtype: list
"""
if not kls.is_kext_loaded():
raise EIPNoTunKextLoaded
# we use `super` in order to send the class to use
command = super(DarwinVPNLauncher, kls).get_vpn_command(
eipconfig, providerconfig, socket_host, socket_port, openvpn_verb)
cocoa, cargs = kls.get_cocoasudo_ovpn_cmd()
cargs.extend(command)
command = cargs
command.insert(0, cocoa)
command.extend(['--setenv', "LEAPUSER", getpass.getuser()])
return command
@classmethod
def get_vpn_env(kls):
"""
Returns a dictionary with the custom env for the platform.
This is mainly used for setting LD_LIBRARY_PATH to the correct
path when distributing a standalone client
:rtype: dict
"""
ld_library_path = os.path.join(get_path_prefix(), "..", "lib")
ld_library_path.encode(sys.getfilesystemencoding())
return {
"DYLD_LIBRARY_PATH": ld_library_path
}
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