wifi export for network-manager

gen_wpa_sup.py

#!/usr/bin/env python
#
# Export network-manager WiFi connection details to a wpa-supplicant
# file. This can be saved to an Android device, so you have all your
# laptop's WiFi connections on your phone right away (root required).
#
#    python gen_wpa_sup.py >foo
#    adb push foo /sdcard/foo
#    adb shell
#    su -c 'cat /sdcard/foo >>/data/misc/wifi/wpa_supplicant.conf'
#    rm -f /sdcard/foo
#    exit
#
# 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, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
# Copyright (C) 2010 Red Hat, Inc.
# Copyright (C) 2015 Tobias Mueller <muelli@cryptobitch.de>
# Copyright (C) 2016 wvengen <dev-android@willem.engen.nl>
#

import dbus, sys

bus = dbus.SystemBus()


def merge_secrets(proxy, config, setting_name):
    try:
        # returns a dict of dicts mapping name::setting, where setting is a dict
        # mapping key::value.  Each member of the 'setting' dict is a secret
        secrets = proxy.GetSecrets(setting_name)

        # Copy the secrets into our connection config
        for setting in secrets:
            for key in secrets[setting]:
                config[setting_name][key] = secrets[setting][key]
    except Exception, e:
        pass

def list_connections():
    # Ask the settings service for the list of connections it provides
    service_name = "org.freedesktop.NetworkManager"
    proxy = bus.get_object(service_name, "/org/freedesktop/NetworkManager/Settings")
    settings = dbus.Interface(proxy, "org.freedesktop.NetworkManager.Settings")
    connection_paths = settings.ListConnections()

    ret = []
    # List each connection's name, UUID, and type
    for path in connection_paths:
        con_proxy = bus.get_object(service_name, path)
        settings_connection = dbus.Interface(con_proxy, "org.freedesktop.NetworkManager.Settings.Connection")
        config = settings_connection.GetSettings()
        connection = config.get('connection', {})

        if connection['type'] == '802-11-wireless':
            wireless = config.get('802-11-wireless', {})
            merge_secrets(settings_connection, config, '802-11-wireless')
            merge_secrets(settings_connection, config, '802-11-wireless-security')
            lines = []

            # https://mail.python.org/pipermail/tutor/2013-August/097352.html
            lines.append('ssid="' + bytearray(wireless['ssid']).decode('utf-8') + '"')

            security = config.get('802-11-wireless-security', None)
            if security is None:
                continue # we don't need to export open access points
                lines.append('key_mgmt=OPEN') # otherwise this would work
            elif security.get('key-mgmt') == 'wpa-psk':
                psk = security.get('psk', None)
                if psk is None: continue # security required but not present: skip
                lines.append('key_mgmt=WPA-PSK')
                lines.append('psk="' + security.get('psk') + '"')
            else:
                # @todo support other security mechanisms
                continue

            print "network={\n" + u"\n".join(map(lambda s: '  '+s, lines)).encode('utf-8') + "\n}\n"

if __name__ == '__main__':
    list_connections()