mirror of
https://gitlab.federez.net/re2o/re2o
synced 2024-05-05 09:03:14 +00:00
588 lines
21 KiB
Python
588 lines
21 KiB
Python
# -*- mode: python; coding: utf-8 -*-
|
|
# Re2o est un logiciel d'administration développé initiallement au Rézo Metz. Il
|
|
# se veut agnostique au réseau considéré, de manière à être installable en
|
|
# quelques clics.
|
|
#
|
|
# Copyirght © 2017 Daniel Stan
|
|
# Copyright © 2017 Gabriel Détraz
|
|
# Copyright © 2017 Lara Kermarec
|
|
# Copyright © 2017 Augustin Lemesle
|
|
#
|
|
# 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 2 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.
|
|
|
|
"""
|
|
Python backend for freeradius.
|
|
|
|
This file contains definition of some functions called by freeradius backend
|
|
during auth for wifi, wired device and nas.
|
|
|
|
Other examples can be found here :
|
|
https://github.com/FreeRADIUS/freeradius-server/blob/master/src/modules/rlm_python/
|
|
|
|
Inspired by Daniel Stan in Crans
|
|
"""
|
|
|
|
import os
|
|
import sys
|
|
import logging
|
|
import traceback
|
|
import radiusd # Magic module freeradius (radiusd.py is dummy)
|
|
|
|
from django.core.wsgi import get_wsgi_application
|
|
from django.db.models import Q
|
|
|
|
proj_path = "/var/www/re2o/"
|
|
# This is so Django knows where to find stuff.
|
|
os.environ.setdefault("DJANGO_SETTINGS_MODULE", "re2o.settings")
|
|
sys.path.append(proj_path)
|
|
|
|
# This is so my local_settings.py gets loaded.
|
|
os.chdir(proj_path)
|
|
|
|
# This is so models get loaded.
|
|
application = get_wsgi_application()
|
|
|
|
from machines.models import Interface, IpList, Nas, Domain
|
|
from topologie.models import Port, Switch
|
|
from users.models import User
|
|
from preferences.models import RadiusOption
|
|
|
|
|
|
|
|
# Logging
|
|
class RadiusdHandler(logging.Handler):
|
|
"""Logs handler for freeradius"""
|
|
|
|
def emit(self, record):
|
|
"""Log message processing, level are converted"""
|
|
if record.levelno >= logging.WARN:
|
|
rad_sig = radiusd.L_ERR
|
|
elif record.levelno >= logging.INFO:
|
|
rad_sig = radiusd.L_INFO
|
|
else:
|
|
rad_sig = radiusd.L_DBG
|
|
radiusd.radlog(rad_sig, str(record.msg))
|
|
|
|
|
|
# Init for logging
|
|
logger = logging.getLogger("auth.py")
|
|
logger.setLevel(logging.DEBUG)
|
|
formatter = logging.Formatter("%(name)s: [%(levelname)s] %(message)s")
|
|
handler = RadiusdHandler()
|
|
handler.setFormatter(formatter)
|
|
logger.addHandler(handler)
|
|
|
|
|
|
def radius_event(fun):
|
|
"""Decorator for freeradius fonction with radius.
|
|
This function take a unique argument which is a list of tuples (key, value)
|
|
and return a tuple of 3 values which are:
|
|
* return code (see radiusd.RLM_MODULE_* )
|
|
* a tuple of 2 elements for response value (access ok , etc)
|
|
* a tuple of 2 elements for internal value to update (password for example)
|
|
|
|
Here, we convert the list of tuples into a dictionnary.
|
|
"""
|
|
|
|
def new_f(auth_data):
|
|
""" The function transforming the tuples as dict """
|
|
if isinstance(auth_data, dict):
|
|
data = auth_data
|
|
else:
|
|
data = dict()
|
|
for (key, value) in auth_data or []:
|
|
# Beware: les valeurs scalaires sont entre guillemets
|
|
# Ex: Calling-Station-Id: "une_adresse_mac"
|
|
data[key] = value.replace('"', "")
|
|
try:
|
|
return fun(data)
|
|
except Exception as err:
|
|
exc_type, exc_instance, exc_traceback = sys.exc_info()
|
|
formatted_traceback = "".join(traceback.format_tb(exc_traceback))
|
|
logger.error("Failed %r on data %r" % (err, auth_data))
|
|
logger.error("Function %r, Traceback : %r" % (fun, formatted_traceback))
|
|
return radiusd.RLM_MODULE_FAIL
|
|
|
|
return new_f
|
|
|
|
|
|
@radius_event
|
|
def instantiate(*_):
|
|
"""Usefull for instantiate ldap connexions otherwise,
|
|
do nothing"""
|
|
logger.info("Instantiation")
|
|
|
|
|
|
@radius_event
|
|
def authorize(data):
|
|
"""Here, we test if the Nas is known.
|
|
- If the nas is unknown, we assume that it is a 802.1X request,
|
|
- If the nas is known, we apply the 802.1X if enabled,
|
|
- It the nas is known AND nas auth is enabled with mac address, returns
|
|
accept here"""
|
|
# For proxified request, split
|
|
nas = data.get("NAS-IP-Address", data.get("NAS-Identifier", None))
|
|
nas_instance = find_nas_from_request(nas)
|
|
# For none proxified requests
|
|
nas_type = None
|
|
if nas_instance:
|
|
nas_type = Nas.objects.filter(nas_type=nas_instance.machine_type).first()
|
|
if not nas_type or nas_type.port_access_mode == "802.1X":
|
|
user = data.get("User-Name", "")
|
|
user = user.split("@", 1)[0]
|
|
mac = data.get("Calling-Station-Id", "")
|
|
result, log, password = check_user_machine_and_register(nas_type, user, mac)
|
|
logger.info(str(log))
|
|
logger.info(str(user))
|
|
|
|
if not result:
|
|
return radiusd.RLM_MODULE_REJECT
|
|
else:
|
|
return (
|
|
radiusd.RLM_MODULE_UPDATED,
|
|
(),
|
|
((str("NT-Password"), str(password)),),
|
|
)
|
|
|
|
else:
|
|
return (radiusd.RLM_MODULE_UPDATED, (), (("Auth-Type", "Accept"),))
|
|
|
|
|
|
@radius_event
|
|
def post_auth(data):
|
|
""" Function called after the user is authenticated
|
|
"""
|
|
|
|
nas = data.get("NAS-IP-Address", data.get("NAS-Identifier", None))
|
|
nas_instance = find_nas_from_request(nas)
|
|
# All non proxified requests
|
|
if not nas_instance:
|
|
logger.info("Proxified request, nas unknown")
|
|
return radiusd.RLM_MODULE_OK
|
|
nas_type = Nas.objects.filter(nas_type=nas_instance.machine_type).first()
|
|
if not nas_type:
|
|
logger.info("This kind of nas is not registered in the database!")
|
|
return radiusd.RLM_MODULE_OK
|
|
|
|
mac = data.get("Calling-Station-Id", None)
|
|
|
|
# Switchs and access point can have several interfaces
|
|
nas_machine = nas_instance.machine
|
|
# If it is a switchs
|
|
if hasattr(nas_machine, "switch"):
|
|
port = data.get("NAS-Port-Id", data.get("NAS-Port", None))
|
|
# If the switch is part of a stack, calling ip is different from calling switch.
|
|
instance_stack = nas_machine.switch.stack
|
|
if instance_stack:
|
|
# If it is a stack, we select the correct switch in the stack
|
|
id_stack_member = port.split("-")[1].split("/")[0]
|
|
nas_machine = (
|
|
Switch.objects.filter(stack=instance_stack)
|
|
.filter(stack_member_id=id_stack_member)
|
|
.prefetch_related("interface_set__domain__extension")
|
|
.first()
|
|
)
|
|
# Find the port number from freeradius, works both with HP, Cisco
|
|
# and juniper output
|
|
port = port.split(".")[0].split("/")[-1][-2:]
|
|
out = decide_vlan_switch(nas_machine, nas_type, port, mac)
|
|
sw_name, room, reason, vlan_id, decision, attributes = out
|
|
|
|
if decision:
|
|
log_message = "(wired) %s -> %s [%s%s]" % (
|
|
sw_name + ":" + port + "/" + str(room),
|
|
mac,
|
|
vlan_id,
|
|
(reason and ": " + reason),
|
|
)
|
|
logger.info(log_message)
|
|
|
|
# Wired connexion
|
|
return (
|
|
radiusd.RLM_MODULE_UPDATED,
|
|
(
|
|
("Tunnel-Type", "VLAN"),
|
|
("Tunnel-Medium-Type", "IEEE-802"),
|
|
("Tunnel-Private-Group-Id", "%d" % int(vlan_id)),
|
|
)
|
|
+ tuple(attributes),
|
|
(),
|
|
)
|
|
else:
|
|
log_message = "(fil) %s -> %s [Reject %s]" % (
|
|
sw_name + ":" + port + "/" + str(room),
|
|
mac,
|
|
(reason and ": " + reason),
|
|
)
|
|
logger.info(log_message)
|
|
|
|
return (radiusd.RLM_MODULE_REJECT, tuple(attributes), ())
|
|
|
|
else:
|
|
return radiusd.RLM_MODULE_OK
|
|
|
|
|
|
# TODO : remove this function
|
|
@radius_event
|
|
def dummy_fun(_):
|
|
"""Do nothing, successfully. """
|
|
return radiusd.RLM_MODULE_OK
|
|
|
|
|
|
def detach(_=None):
|
|
"""Detatch the auth"""
|
|
print("*** goodbye from auth.py ***")
|
|
return radiusd.RLM_MODULE_OK
|
|
|
|
|
|
def find_nas_from_request(nas_id):
|
|
""" Get the nas object from its ID """
|
|
nas = (
|
|
Interface.objects.filter(
|
|
Q(domain=Domain.objects.filter(name=nas_id))
|
|
| Q(ipv4=IpList.objects.filter(ipv4=nas_id))
|
|
)
|
|
.select_related("machine_type")
|
|
.select_related("machine__switch__stack")
|
|
)
|
|
return nas.first()
|
|
|
|
|
|
def check_user_machine_and_register(nas_type, username, mac_address):
|
|
"""Check if username and mac are registered. Register it if unknown.
|
|
Return the user ntlm password if everything is ok.
|
|
Used for 802.1X auth"""
|
|
interface = Interface.objects.filter(mac_address=mac_address).first()
|
|
user = User.objects.filter(pseudo__iexact=username).first()
|
|
if not user:
|
|
return (False, "User unknown", "")
|
|
if not user.has_access():
|
|
return (False, "Invalid connexion (non-contributing user)", "")
|
|
if interface:
|
|
if interface.machine.user != user:
|
|
return (
|
|
False,
|
|
"Mac address registered on another user account",
|
|
"",
|
|
)
|
|
elif not interface.is_active:
|
|
return (False, "Interface/Machine disabled", "")
|
|
elif not interface.ipv4:
|
|
interface.assign_ipv4()
|
|
return (True, "Ok, new ipv4 assignement...", user.pwd_ntlm)
|
|
else:
|
|
return (True, "Access ok", user.pwd_ntlm)
|
|
elif nas_type:
|
|
if nas_type.autocapture_mac:
|
|
result, reason = user.autoregister_machine(mac_address, nas_type)
|
|
if result:
|
|
return (True, "Access Ok, Registering mac...", user.pwd_ntlm)
|
|
else:
|
|
return (False, "Error during mac register %s" % reason, "")
|
|
else:
|
|
return (False, "Unknown interface/machine", "")
|
|
else:
|
|
return (False, "Unknown interface/machine", "")
|
|
|
|
|
|
def decide_vlan_switch(nas_machine, nas_type, port_number, mac_address):
|
|
"""Function for selecting vlan for a switch with wired mac auth radius.
|
|
Several modes are available :
|
|
- all modes:
|
|
- unknown NAS : VLAN_OK,
|
|
- unknown port : Decision set in Re2o RadiusOption
|
|
- No radius on this port : VLAN_OK
|
|
- force : returns vlan provided by the database
|
|
- mode strict:
|
|
- no room : Decision set in Re2o RadiusOption,
|
|
- no user in this room : Reject,
|
|
- user of this room is banned or disable : Reject,
|
|
- user of this room non-contributor and not whitelisted:
|
|
Decision set in Re2o RadiusOption
|
|
- mode common :
|
|
- mac-address already registered:
|
|
- related user non contributor / interface disabled:
|
|
Decision set in Re2o RadiusOption
|
|
- related user is banned:
|
|
Decision set in Re2o RadiusOption
|
|
- user contributing : VLAN_OK (can assign ipv4 if needed)
|
|
- unknown interface :
|
|
- register mac disabled : Decision set in Re2o RadiusOption
|
|
- register mac enabled : redirect to webauth
|
|
Returns:
|
|
tuple with :
|
|
- Switch name (str)
|
|
- Room (str)
|
|
- Reason of the decision (str)
|
|
- vlan_id (int)
|
|
- decision (bool)
|
|
- Other Attributs (attribut:str, operator:str, value:str)
|
|
"""
|
|
attributes_kwargs = {
|
|
"client_mac": str(mac_address),
|
|
"switch_port": str(port_number),
|
|
}
|
|
# Get port from switch and port number
|
|
extra_log = ""
|
|
# If NAS is unknown, go to default vlan
|
|
if not nas_machine:
|
|
return (
|
|
"?",
|
|
"Unknown room",
|
|
"Unknown NAS",
|
|
RadiusOption.get_cached_value("vlan_decision_ok").vlan_id,
|
|
True,
|
|
RadiusOption.get_attributes("ok_attributes", attributes_kwargs),
|
|
)
|
|
|
|
sw_name = str(getattr(nas_machine, "short_name", str(nas_machine)))
|
|
|
|
switch = Switch.objects.filter(machine_ptr=nas_machine).first()
|
|
attributes_kwargs["switch_ip"] = str(switch.ipv4)
|
|
port = Port.objects.filter(switch=switch, port=port_number).first()
|
|
|
|
# If the port is unknwon, go to default vlan
|
|
# We don't have enought information to make a better decision
|
|
if not port:
|
|
return (
|
|
sw_name,
|
|
"Unknown port",
|
|
"PUnknown port",
|
|
getattr(
|
|
RadiusOption.get_cached_value("unknown_port_vlan"), "vlan_id", None
|
|
),
|
|
RadiusOption.get_cached_value("unknown_port") != RadiusOption.REJECT,
|
|
RadiusOption.get_attributes("unknown_port_attributes", attributes_kwargs),
|
|
)
|
|
|
|
# Retrieve port profile
|
|
port_profile = port.get_port_profile
|
|
|
|
# If a vlan is precised in port config, we use it
|
|
if port_profile.vlan_untagged:
|
|
DECISION_VLAN = int(port_profile.vlan_untagged.vlan_id)
|
|
extra_log = "Force sur vlan " + str(DECISION_VLAN)
|
|
attributes = ()
|
|
else:
|
|
DECISION_VLAN = RadiusOption.get_cached_value("vlan_decision_ok").vlan_id
|
|
attributes = RadiusOption.get_attributes("ok_attributes", attributes_kwargs)
|
|
|
|
# If the port is disabled in re2o, REJECT
|
|
if not port.state:
|
|
return (sw_name, port.room, "Port disabled", None, False, ())
|
|
|
|
# If radius is disabled, decision is OK
|
|
if port_profile.radius_type == "NO":
|
|
return (
|
|
sw_name,
|
|
"",
|
|
"No Radius auth enabled on this port" + extra_log,
|
|
DECISION_VLAN,
|
|
True,
|
|
attributes,
|
|
)
|
|
|
|
# If 802.1X is enabled, people has been previously accepted.
|
|
# Go to the decision vlan
|
|
if (nas_type.port_access_mode, port_profile.radius_type) == ("802.1X", "802.1X"):
|
|
room = port.room or "Room unknown"
|
|
return (
|
|
sw_name,
|
|
room,
|
|
"Accept authentication 802.1X",
|
|
DECISION_VLAN,
|
|
True,
|
|
attributes,
|
|
)
|
|
|
|
# Otherwise, we are in mac radius.
|
|
# If strict mode is enabled, we check every user related with this port. If
|
|
# one user or more is not enabled, we reject to prevent from sharing or
|
|
# spoofing mac.
|
|
if port_profile.radius_mode == "STRICT":
|
|
room = port.room
|
|
if not room:
|
|
return (
|
|
sw_name,
|
|
"Unknown",
|
|
"Unkwown room",
|
|
getattr(
|
|
RadiusOption.get_cached_value("unknown_room_vlan"), "vlan_id", None
|
|
),
|
|
RadiusOption.get_cached_value("unknown_room") != RadiusOption.REJECT,
|
|
RadiusOption.get_attributes(
|
|
"unknown_room_attributes", attributes_kwargs
|
|
),
|
|
)
|
|
|
|
room_user = User.objects.filter(
|
|
Q(club__room=port.room) | Q(adherent__room=port.room)
|
|
)
|
|
if not room_user:
|
|
return (
|
|
sw_name,
|
|
room,
|
|
"Non-contributing room",
|
|
getattr(
|
|
RadiusOption.get_cached_value("non_member_vlan"), "vlan_id", None
|
|
),
|
|
RadiusOption.get_cached_value("non_member") != RadiusOption.REJECT,
|
|
RadiusOption.get_attributes("non_member_attributes", attributes_kwargs),
|
|
)
|
|
for user in room_user:
|
|
if user.is_ban() or user.state != User.STATE_ACTIVE:
|
|
return (
|
|
sw_name,
|
|
room,
|
|
"User is banned or disabled",
|
|
getattr(
|
|
RadiusOption.get_cached_value("banned_vlan"), "vlan_id", None
|
|
),
|
|
RadiusOption.get_cached_value("banned") != RadiusOption.REJECT,
|
|
RadiusOption.get_attributes("banned_attributes", attributes_kwargs),
|
|
)
|
|
elif user.email_state == User.EMAIL_STATE_UNVERIFIED:
|
|
return (
|
|
sw_name,
|
|
room,
|
|
"User is suspended (mail has not been confirmed)",
|
|
getattr(
|
|
RadiusOption.get_cached_value("non_member_vlan"),
|
|
"vlan_id",
|
|
None,
|
|
),
|
|
RadiusOption.get_cached_value("non_member") != RadiusOption.REJECT,
|
|
RadiusOption.get_attributes(
|
|
"non_member_attributes", attributes_kwargs
|
|
),
|
|
)
|
|
elif not (user.is_connected() or user.is_whitelisted()):
|
|
return (
|
|
sw_name,
|
|
room,
|
|
"Non-contributing member",
|
|
getattr(
|
|
RadiusOption.get_cached_value("non_member_vlan"),
|
|
"vlan_id",
|
|
None,
|
|
),
|
|
RadiusOption.get_cached_value("non_member") != RadiusOption.REJECT,
|
|
RadiusOption.get_attributes(
|
|
"non_member_attributes", attributes_kwargs
|
|
),
|
|
)
|
|
# else: user OK, so we check MAC now
|
|
|
|
# If we are authenticating with mac, we look for the interfaces and its mac address
|
|
if port_profile.radius_mode == "COMMON" or port_profile.radius_mode == "STRICT":
|
|
# Mac auth
|
|
interface = (
|
|
Interface.objects.filter(mac_address=mac_address)
|
|
.select_related("machine__user")
|
|
.select_related("ipv4")
|
|
.first()
|
|
)
|
|
# If mac is unknown,
|
|
if not interface:
|
|
room = port.room
|
|
# We try to register mac, if autocapture is enabled
|
|
# Final decision depend on RADIUSOption set in re2o
|
|
if nas_type.autocapture_mac:
|
|
return (
|
|
sw_name,
|
|
room,
|
|
"Unknown mac/interface",
|
|
getattr(
|
|
RadiusOption.get_cached_value("unknown_machine_vlan"),
|
|
"vlan_id",
|
|
None,
|
|
),
|
|
RadiusOption.get_cached_value("unknown_machine")
|
|
!= RadiusOption.REJECT,
|
|
RadiusOption.get_attributes(
|
|
"unknown_machine_attributes", attributes_kwargs
|
|
),
|
|
)
|
|
# Otherwise, if autocapture mac is not enabled,
|
|
else:
|
|
return (
|
|
sw_name,
|
|
"",
|
|
"Unknown mac/interface",
|
|
getattr(
|
|
RadiusOption.get_cached_value("unknown_machine_vlan"),
|
|
"vlan_id",
|
|
None,
|
|
),
|
|
RadiusOption.get_cached_value("unknown_machine")
|
|
!= RadiusOption.REJECT,
|
|
RadiusOption.get_attributes(
|
|
"unknown_machine_attributes", attributes_kwargs
|
|
),
|
|
)
|
|
|
|
# Mac/Interface is found, check if related user is contributing and ok
|
|
# If needed, set ipv4 to it
|
|
else:
|
|
room = port.room
|
|
if interface.machine.user.is_ban():
|
|
return (
|
|
sw_name,
|
|
room,
|
|
"Banned user",
|
|
getattr(
|
|
RadiusOption.get_cached_value("banned_vlan"), "vlan_id", None
|
|
),
|
|
RadiusOption.get_cached_value("banned") != RadiusOption.REJECT,
|
|
RadiusOption.get_attributes("banned_attributes", attributes_kwargs),
|
|
)
|
|
if not interface.is_active:
|
|
return (
|
|
sw_name,
|
|
room,
|
|
"Disabled interface / non-contributing member",
|
|
getattr(
|
|
RadiusOption.get_cached_value("non_member_vlan"),
|
|
"vlan_id",
|
|
None,
|
|
),
|
|
RadiusOption.get_cached_value("non_member") != RadiusOption.REJECT,
|
|
RadiusOption.get_attributes(
|
|
"non_member_attributes", attributes_kwargs
|
|
),
|
|
)
|
|
# If settings is set to related interface vlan policy based on interface type:
|
|
if RadiusOption.get_cached_value("radius_general_policy") == "MACHINE":
|
|
DECISION_VLAN = interface.machine_type.ip_type.vlan.vlan_id
|
|
if not interface.ipv4:
|
|
interface.assign_ipv4()
|
|
return (
|
|
sw_name,
|
|
room,
|
|
"Ok, assigning new ipv4" + extra_log,
|
|
DECISION_VLAN,
|
|
True,
|
|
attributes,
|
|
)
|
|
else:
|
|
return (
|
|
sw_name,
|
|
room,
|
|
"Interface OK" + extra_log,
|
|
DECISION_VLAN,
|
|
True,
|
|
attributes,
|
|
)
|