468 lines
14 KiB
Python
468 lines
14 KiB
Python
# vi: ts=4 ai noet
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#
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# Copyright (C) 2006, Red Hat, Inc.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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import dbus
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import dbus.service
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import time
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import os
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import binascii
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import ConfigParser
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import logging
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import nmclient
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try:
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from sugar import env
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except ImportError:
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pass
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NM_INFO_IFACE='org.freedesktop.NetworkManagerInfo'
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NM_INFO_PATH='/org/freedesktop/NetworkManagerInfo'
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class NoNetworks(dbus.DBusException):
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def __init__(self):
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dbus.DBusException.__init__(self)
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self._dbus_error_name = NM_INFO_IFACE + '.NoNetworks'
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class CanceledKeyRequestError(dbus.DBusException):
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def __init__(self):
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dbus.DBusException.__init__(self)
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self._dbus_error_name = NM_INFO_IFACE + '.CanceledError'
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class NetworkInvalidError(Exception):
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pass
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class NMConfig(ConfigParser.ConfigParser):
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def get_bool(self, section, name):
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opt = self.get(section, name)
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if type(opt) == type(""):
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if opt.lower() == 'yes' or opt.lower() == 'true':
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return True
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elif opt.lower() == 'no' or opt.lower() == 'false':
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return False
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raise ValueError("Invalid format for %s/%s. Should be one of [yes, no, true, false]." % (section, name))
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def get_list(self, section, name):
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opt = self.get(section, name)
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if type(opt) == type(""):
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if not len(opt):
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return []
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try:
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return opt.split()
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except Exception:
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pass
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raise ValueError("Invalid format for %s/%s. Should be a space-separate list." % (section, name))
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def get_int(self, section, name):
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opt = self.get(section, name)
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try:
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return int(opt)
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except Exception:
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pass
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raise ValueError("Invalid format for %s/%s. Should be a valid integer." % (section, name))
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def get_float(self, section, name):
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opt = self.get(section, name)
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try:
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return float(opt)
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except Exception:
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pass
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raise ValueError("Invalid format for %s/%s. Should be a valid float." % (section, name))
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IW_AUTH_CIPHER_NONE = 0x00000001
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IW_AUTH_CIPHER_WEP40 = 0x00000002
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IW_AUTH_CIPHER_TKIP = 0x00000004
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IW_AUTH_CIPHER_CCMP = 0x00000008
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IW_AUTH_CIPHER_WEP104 = 0x00000010
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IW_AUTH_ALG_OPEN_SYSTEM = 0x00000001
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IW_AUTH_ALG_SHARED_KEY = 0x00000002
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NETWORK_TYPE_UNKNOWN = 0
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NETWORK_TYPE_ALLOWED = 1
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NETWORK_TYPE_INVALID = 2
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class Security(object):
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def __init__(self, we_cipher):
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self._we_cipher = we_cipher
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def read_from_config(self, cfg, name):
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pass
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def read_from_args(self, args):
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pass
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def new_from_config(cfg, name):
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security = None
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try:
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we_cipher = cfg.get_int(name, "we_cipher")
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if we_cipher == IW_AUTH_CIPHER_NONE:
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security = Security(we_cipher)
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elif we_cipher == IW_AUTH_CIPHER_WEP40 or we_cipher == IW_AUTH_CIPHER_WEP104:
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security = WEPSecurity(we_cipher)
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else:
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# FIXME: find a way to make WPA config option matrix not
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# make you want to throw up
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raise ValueError("Unsupported security combo")
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security.read_from_config(cfg, name)
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except (ConfigParser.NoOptionError, ValueError), e:
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return None
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return security
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new_from_config = staticmethod(new_from_config)
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def new_from_args(we_cipher, args):
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security = None
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try:
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if we_cipher == IW_AUTH_CIPHER_NONE:
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security = Security(we_cipher)
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elif we_cipher == IW_AUTH_CIPHER_WEP40 or we_cipher == IW_AUTH_CIPHER_WEP104:
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security = WEPSecurity(we_cipher)
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else:
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# FIXME: find a way to make WPA config option matrix not
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# make you want to throw up
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raise ValueError("Unsupported security combo")
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security.read_from_args(args)
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except ValueError, e:
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logging.debug("Error reading security information: %s" % e)
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del security
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return None
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return security
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new_from_args = staticmethod(new_from_args)
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def get_properties(self):
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return [dbus.Int32(self._we_cipher)]
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def write_to_config(self, section, config):
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config.set(section, "we_cipher", self._we_cipher)
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class WEPSecurity(Security):
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def read_from_args(self, args):
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if len(args) != 2:
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raise ValueError("not enough arguments")
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key = args[0]
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auth_alg = args[1]
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if isinstance(key, unicode):
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key = key.encode()
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if not isinstance(key, str):
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raise ValueError("wrong argument type for key")
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if not isinstance(auth_alg, int):
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raise ValueError("wrong argument type for auth_alg")
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self._key = key
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self._auth_alg = auth_alg
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def read_from_config(self, cfg, name):
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# Key should be a hex encoded string
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self._key = cfg.get(name, "key")
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if self._we_cipher == IW_AUTH_CIPHER_WEP40 and len(self._key) != 10:
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raise ValueError("Key length not right for 40-bit WEP")
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if self._we_cipher == IW_AUTH_CIPHER_WEP104 and len(self._key) != 26:
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raise ValueError("Key length not right for 104-bit WEP")
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try:
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a = binascii.a2b_hex(self._key)
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except TypeError:
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raise ValueError("Key was not a hexadecimal string.")
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self._auth_alg = cfg.get_int(name, "auth_alg")
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if self._auth_alg != IW_AUTH_ALG_OPEN_SYSTEM and self._auth_alg != IW_AUTH_ALG_SHARED_KEY:
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raise ValueError("Invalid authentication algorithm %d" % self._auth_alg)
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def get_properties(self):
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args = Security.get_properties(self)
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args.append(dbus.String(self._key))
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args.append(dbus.Int32(self._auth_alg))
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return args
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def write_to_config(self, section, config):
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Security.write_to_config(self, section, config)
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config.set(section, "key", self._key)
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config.set(section, "auth_alg", self._auth_alg)
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class Network:
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def __init__(self, ssid):
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self.ssid = ssid
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self.timestamp = int(time.time())
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self.bssids = []
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self.we_cipher = 0
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self._security = None
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def get_properties(self):
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bssid_list = dbus.Array([], signature="s")
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for item in self.bssids:
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bssid_list.append(dbus.String(item))
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args = [dbus.String(self.ssid), dbus.Int32(self.timestamp), dbus.Boolean(True), bssid_list]
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args += self._security.get_properties()
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return tuple(args)
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def get_security(self):
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return self._security.get_properties()
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def set_security(self, security):
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self._security = security
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def read_from_args(self, auto, bssid, we_cipher, args):
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if auto == False:
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self.timestamp = int(time.time())
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if not bssid in self.bssids:
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self.bssids.append(bssid)
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self._security = Security.new_from_args(we_cipher, args)
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if not self._security:
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raise NetworkInvalidError("Invalid security information")
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def read_from_config(self, config):
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try:
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self.timestamp = config.get_int(self.ssid, "timestamp")
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except (ConfigParser.NoOptionError, ValueError), e:
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raise NetworkInvalidError(e)
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self._security = Security.new_from_config(config, self.ssid)
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if not self._security:
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raise NetworkInvalidError(e)
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# The following don't need to be present
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try:
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self.bssids = config.get_list(self.ssid, "bssids")
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except (ConfigParser.NoOptionError, ValueError), e:
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pass
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def write_to_config(self, config):
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try:
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config.add_section(self.ssid)
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config.set(self.ssid, "timestamp", self.timestamp)
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if len(self.bssids) > 0:
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opt = " "
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opt.join(self.bssids)
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config.set(self.ssid, "bssids", opt)
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self._security.write_to_config(self.ssid, config)
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except Exception, e:
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logging.debug("Error writing '%s': %s" % (self.ssid, e))
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class NotFoundError(dbus.DBusException):
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pass
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class UnsupportedError(dbus.DBusException):
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pass
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class NMInfoDBusServiceHelper(dbus.service.Object):
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def __init__(self, parent):
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self._parent = parent
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bus = dbus.SystemBus()
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# If NMI is already around, don't grab the NMI service
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bus_object = bus.get_object('org.freedesktop.DBus', '/org/freedesktop/DBus')
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name = None
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try:
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name = bus_object.GetNameOwner("org.freedesktop.NetworkManagerInfo", \
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dbus_interface='org.freedesktop.DBus')
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except dbus.DBusException:
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pass
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if name:
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logging.debug("NMI service already owned by %s, won't claim it." % name)
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raise RuntimeError
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bus_name = dbus.service.BusName(NM_INFO_IFACE, bus=bus)
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dbus.service.Object.__init__(self, bus_name, NM_INFO_PATH)
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@dbus.service.method(NM_INFO_IFACE, in_signature='i', out_signature='as')
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def getNetworks(self, net_type):
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ssids = self._parent.get_networks(net_type)
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if len(ssids) > 0:
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return dbus.Array(ssids)
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raise NoNetworks()
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@dbus.service.method(NM_INFO_IFACE, in_signature='si', async_callbacks=('async_cb', 'async_err_cb'))
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def getNetworkProperties(self, ssid, net_type, async_cb, async_err_cb):
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self._parent.get_network_properties(ssid, net_type, async_cb, async_err_cb)
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@dbus.service.method(NM_INFO_IFACE)
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def updateNetworkInfo(self, ssid, bauto, bssid, cipher, *args):
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self._parent.update_network_info(ssid, bauto, bssid, cipher, args)
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@dbus.service.method(NM_INFO_IFACE, async_callbacks=('async_cb', 'async_err_cb'))
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def getKeyForNetwork(self, dev_path, net_path, ssid, attempt, new_key, async_cb, async_err_cb):
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self._parent.get_key_for_network(dev_path, net_path, ssid,
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attempt, new_key, async_cb, async_err_cb)
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@dbus.service.method(NM_INFO_IFACE)
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def cancelGetKeyForNetwork(self):
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self._parent.cancel_get_key_for_network()
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class NMInfo(object):
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def __init__(self, client):
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try:
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profile_path = env.get_profile_path()
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except NameError:
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home = os.path.expanduser("~")
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profile_path = os.path.join(home, ".sugar", "default")
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self._cfg_file = os.path.join(profile_path, "nm", "networks.cfg")
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self._nmclient = client
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self._allowed_networks = self._read_config()
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self._dbus_helper = NMInfoDBusServiceHelper(self)
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def save_config(self):
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self._write_config(self._allowed_networks)
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def _read_config(self):
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if not os.path.exists(os.path.dirname(self._cfg_file)):
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os.makedirs(os.path.dirname(self._cfg_file), 0755)
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if not os.path.exists(self._cfg_file):
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self._write_config({})
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return {}
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config = NMConfig()
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config.read(self._cfg_file)
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networks = {}
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for name in config.sections():
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if not isinstance(name, unicode):
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name = unicode(name)
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net = Network(name)
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try:
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net.read_from_config(config)
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networks[name] = net
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except NetworkInvalidError, e:
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logging.debug("Error: invalid stored network config: %s" % e)
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del net
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del config
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return networks
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def _write_config(self, networks):
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fp = open(self._cfg_file, 'w')
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config = NMConfig()
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for net in networks.values():
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net.write_to_config(config)
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config.write(fp)
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fp.close()
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del config
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def get_networks(self, net_type):
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if net_type != NETWORK_TYPE_ALLOWED:
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raise ValueError("Bad network type")
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nets = []
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for net in self._allowed_networks.values():
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nets.append(net.ssid)
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logging.debug("Returning networks: %s" % nets)
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return nets
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def get_network_properties(self, ssid, net_type, async_cb, async_err_cb):
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if not isinstance(ssid, unicode):
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async_err_cb(ValueError("Invalid arguments; ssid must be unicode."))
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if net_type != NETWORK_TYPE_ALLOWED:
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async_err_cb(ValueError("Bad network type"))
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if not self._allowed_networks.has_key(ssid):
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async_err_cb(NotFoundError("Network '%s' not found." % ssid))
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network = self._allowed_networks[ssid]
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props = network.get_properties()
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# DBus workaround: the normal method return handler wraps
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# the returned arguments in a tuple and then converts that to a
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# struct, but NetworkManager expects a plain list of arguments.
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# It turns out that the async callback method return code _doesn't_
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# wrap the returned arguments in a tuple, so as a workaround use
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# the async callback stuff here even though we're not doing it
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# asynchronously.
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async_cb(*props)
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def update_network_info(self, ssid, auto, bssid, we_cipher, args):
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if not isinstance(ssid, unicode):
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raise ValueError("Invalid arguments; ssid must be unicode.")
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if self._allowed_networks.has_key(ssid):
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del self._allowed_networks[ssid]
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net = Network(ssid)
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try:
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net.read_from_args(auto, bssid, we_cipher, args)
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logging.debug("Updated network information for '%s'." % ssid)
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self._allowed_networks[ssid] = net
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self.save_config()
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except NetworkInvalidError, e:
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logging.debug("Error updating network information: %s" % e)
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del net
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def get_key_for_network(self, dev_op, net_op, ssid, attempt, new_key, async_cb, async_err_cb):
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if not isinstance(ssid, unicode):
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raise ValueError("Invalid arguments; ssid must be unicode.")
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if self._allowed_networks.has_key(ssid) and not new_key:
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# We've got the info already
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net = self._allowed_networks[ssid]
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async_cb(tuple(net.get_security()))
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return
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# Otherwise, ask the user for it
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net = None
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dev = self._nmclient.get_device(dev_op)
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if not dev:
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async_err_cb(NotFoundError("Device was unknown."))
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return
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if dev.get_type() == nmclient.DEVICE_TYPE_802_3_ETHERNET:
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# We don't support wired 802.1x yet...
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async_err_cb(UnsupportedError("Device type is unsupported by NMI."))
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return
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net = dev.get_network(net_op)
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if not net:
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async_err_cb(NotFoundError("Network was unknown."))
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return
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self._nmclient.get_key_for_network(net, async_cb, async_err_cb)
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def get_key_for_network_cb(self, net, key, auth_alg, async_cb, async_err_cb, canceled=False):
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"""
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Called by the NMClient when the Wireless Network Key dialog
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is closed.
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"""
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if canceled:
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e = CanceledKeyRequestError("Request was canceled.")
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# key dialog dialog was canceled; send the error back to NM
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async_err_cb(e)
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return
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if not key or not auth_alg:
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# no key returned, *** BUG ***; the key dialog
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# should always return either a key + auth_alg, or a
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#cancel error
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raise RuntimeError("No key or auth alg given! Bug!")
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we_cipher = None
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if len(key) == 26:
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we_cipher = IW_AUTH_CIPHER_WEP104
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elif len(key) == 10:
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we_cipher = IW_AUTH_CIPHER_WEP40
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else:
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raise RuntimeError("Invalid key length!")
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# Stuff the returned key and auth algorithm into a security object
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# and return it to NetworkManager
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sec = Security.new_from_args(we_cipher, (key, auth_alg))
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if not sec:
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raise RuntimeError("Invalid security arguments.")
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props = sec.get_properties()
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a = tuple(props)
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async_cb(*a)
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def cancel_get_key_for_network(self):
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# Tell the NMClient to close the key request dialog
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self._nmclient.cancel_get_key_for_network()
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