Source code for univention.radius.school_networkaccess

#!/usr/bin/python3
# -*- coding: utf-8 -*-
#
# UCS@school RADIUS 802.1X
#  NTLM-Authentication program
#
# Copyright (C) 2012-2021 Univention GmbH
#
# http://www.univention.de/
#
# All rights reserved.
#
# The source code of the software contained in this package
# as well as the source package itself are made available
# under the terms of the GNU Affero General Public License version 3
# (GNU AGPL V3) as published by the Free Software Foundation.
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from univention.radius.networkaccess import NetworkAccess


[docs]class SchoolNetworkAccess(NetworkAccess): def __init__(self, *args, **kwargs): super(SchoolNetworkAccess, self).__init__(*args, **kwargs) self.user_to_group = {} # { "user_lowercase": ["group1", "group2", ], } self.group_info = {} # { "group1": (23, True, ), } self.log_target = None self.load_info()
[docs] def load_info(self): self.logger.debug("Loading proxy rules from UCR") for key in self.configRegistry: if key.startswith("proxy/filter/usergroup/"): group = key[len("proxy/filter/usergroup/") :] users = self.configRegistry[key].split(",") for user in users: self.user_to_group.setdefault(user.lower(), []).append(group) elif key.startswith("proxy/filter/groupdefault/"): group = key[len("proxy/filter/groupdefault/") :] rule = self.configRegistry[key] priority = 0 try: priority = int( self.configRegistry.get("proxy/filter/setting/%s/priority" % (rule,), "") ) except ValueError: pass wlan_enabled = self.configRegistry.is_true("proxy/filter/setting/%s/wlan" % (rule,)) if wlan_enabled is not None: self.group_info[group] = ( priority, wlan_enabled, ) self.logger.debug("Loaded user_to_group {}".format(self.user_to_group)) self.logger.debug("Loaded group_info {}".format(self.group_info))
[docs] def check_proxy_filter_policy(self): self.logger.debug("Checking UCR proxy rules for user") access = self.evaluate_proxy_network_access(self.username) if access: self.logger.info("Login attempt permitted by UCR proxy rules") else: self.logger.info("Login attempt denied by UCR proxy rules") return access
[docs] def evaluate_proxy_network_access(self, username): groups = self.user_to_group.get(username.lower()) if groups is None: self.logger.debug("DENY: No proxy rules for user {} found".format(username)) return False matching_groups = {group: info for group, info in self.group_info.items() if group in groups} if not matching_groups: self.logger.debug("DENY: user {} not found in any WLAN enabled group".format(username)) self.logger.debug("DENY: user {} groups={}".format(username, groups)) self.logger.debug("DENY: WLAN enabled groups={}".format(list(self.group_info.keys()))) return False max_priority = max(rule[0] for rule in matching_groups.values()) max_priority_groups = { group: info for group, info in matching_groups.items() if info[0] == max_priority } if any(wlan_enabled for priority, wlan_enabled in max_priority_groups.values()): self.logger.debug( "ALLOW: WLAN is enabled in a group with highest priority (maxPriorityGroups={})".format( max_priority_groups ) ) return True self.logger.debug( "DENY: WLAN is not enabled in any group with highest priority (maxPriorityGroups={})".format( max_priority_groups ) ) return False