/usr/lib/python3/dist-packages/apparmor/rule/network.py is in python3-apparmor 2.10.95-0ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# Copyright (C) 2013 Kshitij Gupta <kgupta8592@gmail.com>
# Copyright (C) 2015 Christian Boltz <apparmor@cboltz.de>
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of version 2 of the GNU General Public
# License as published by the Free Software Foundation.
#
# 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.
#
# ----------------------------------------------------------------------
import re
from apparmor.regex import RE_PROFILE_NETWORK
from apparmor.common import AppArmorBug, AppArmorException, type_is_str
from apparmor.rule import BaseRule, BaseRuleset, logprof_value_or_all, parse_modifiers
# setup module translations
from apparmor.translations import init_translation
_ = init_translation()
network_domain_keywords = [ 'unspec', 'unix', 'inet', 'ax25', 'ipx', 'appletalk', 'netrom', 'bridge', 'atmpvc', 'x25', 'inet6',
'rose', 'netbeui', 'security', 'key', 'netlink', 'packet', 'ash', 'econet', 'atmsvc', 'rds', 'sna',
'irda', 'pppox', 'wanpipe', 'llc', 'can', 'tipc', 'bluetooth', 'iucv', 'rxrpc', 'isdn', 'phonet',
'ieee802154', 'caif', 'alg', 'nfc', 'vsock', 'mpls', 'ib' ]
network_type_keywords = ['stream', 'dgram', 'seqpacket', 'rdm', 'raw', 'packet']
network_protocol_keywords = ['tcp', 'udp', 'icmp']
RE_NETWORK_DOMAIN = '(' + '|'.join(network_domain_keywords) + ')'
RE_NETWORK_TYPE = '(' + '|'.join(network_type_keywords) + ')'
RE_NETWORK_PROTOCOL = '(' + '|'.join(network_protocol_keywords) + ')'
RE_NETWORK_DETAILS = re.compile(
'^\s*' +
'(?P<domain>' + RE_NETWORK_DOMAIN + ')?' + # optional domain
'(\s+(?P<type_or_protocol>' + RE_NETWORK_TYPE + '|' + RE_NETWORK_PROTOCOL + '))?' + # optional type or protocol
'\s*$')
class NetworkRule(BaseRule):
'''Class to handle and store a single network rule'''
# Nothing external should reference this class, all external users
# should reference the class field NetworkRule.ALL
class __NetworkAll(object):
pass
ALL = __NetworkAll
rule_name = 'network'
def __init__(self, domain, type_or_protocol, audit=False, deny=False, allow_keyword=False,
comment='', log_event=None):
super(NetworkRule, self).__init__(audit=audit, deny=deny,
allow_keyword=allow_keyword,
comment=comment,
log_event=log_event)
self.domain = None
self.all_domains = False
if domain == NetworkRule.ALL:
self.all_domains = True
elif type_is_str(domain):
if domain in network_domain_keywords:
self.domain = domain
else:
raise AppArmorBug('Passed unknown domain to NetworkRule: %s' % domain)
else:
raise AppArmorBug('Passed unknown object to NetworkRule: %s' % str(domain))
self.type_or_protocol = None
self.all_type_or_protocols = False
if type_or_protocol == NetworkRule.ALL:
self.all_type_or_protocols = True
elif type_is_str(type_or_protocol):
if type_or_protocol in network_protocol_keywords:
self.type_or_protocol = type_or_protocol
elif type_or_protocol in network_type_keywords:
self.type_or_protocol = type_or_protocol
else:
raise AppArmorBug('Passed unknown type_or_protocol to NetworkRule: %s' % type_or_protocol)
else:
raise AppArmorBug('Passed unknown object to NetworkRule: %s' % str(type_or_protocol))
@classmethod
def _match(cls, raw_rule):
return RE_PROFILE_NETWORK.search(raw_rule)
@classmethod
def _parse(cls, raw_rule):
'''parse raw_rule and return NetworkRule'''
matches = cls._match(raw_rule)
if not matches:
raise AppArmorException(_("Invalid network rule '%s'") % raw_rule)
audit, deny, allow_keyword, comment = parse_modifiers(matches)
rule_details = ''
if matches.group('details'):
rule_details = matches.group('details')
if rule_details:
details = RE_NETWORK_DETAILS.search(rule_details)
if not details:
raise AppArmorException(_("Invalid or unknown keywords in 'network %s" % rule_details))
if details.group('domain'):
domain = details.group('domain')
else:
domain = NetworkRule.ALL
if details.group('type_or_protocol'):
type_or_protocol = details.group('type_or_protocol')
else:
type_or_protocol = NetworkRule.ALL
else:
domain = NetworkRule.ALL
type_or_protocol = NetworkRule.ALL
return NetworkRule(domain, type_or_protocol,
audit=audit, deny=deny, allow_keyword=allow_keyword, comment=comment)
def get_clean(self, depth=0):
'''return rule (in clean/default formatting)'''
space = ' ' * depth
if self.all_domains:
domain = ''
elif self.domain:
domain = ' %s' % self.domain
else:
raise AppArmorBug('Empty domain in network rule')
if self.all_type_or_protocols:
type_or_protocol = ''
elif self.type_or_protocol:
type_or_protocol = ' %s' % self.type_or_protocol
else:
raise AppArmorBug('Empty type or protocol in network rule')
return('%s%snetwork%s%s,%s' % (space, self.modifiers_str(), domain, type_or_protocol, self.comment))
def is_covered_localvars(self, other_rule):
'''check if other_rule is covered by this rule object'''
if not self._is_covered_plain(self.domain, self.all_domains, other_rule.domain, other_rule.all_domains, 'domain'):
return False
if not self._is_covered_plain(self.type_or_protocol, self.all_type_or_protocols, other_rule.type_or_protocol, other_rule.all_type_or_protocols, 'type or protocol'):
return False
# still here? -> then it is covered
return True
def is_equal_localvars(self, rule_obj):
'''compare if rule-specific variables are equal'''
if not type(rule_obj) == NetworkRule:
raise AppArmorBug('Passed non-network rule: %s' % str(rule_obj))
if (self.domain != rule_obj.domain
or self.all_domains != rule_obj.all_domains):
return False
if (self.type_or_protocol != rule_obj.type_or_protocol
or self.all_type_or_protocols != rule_obj.all_type_or_protocols):
return False
return True
def logprof_header_localvars(self):
family = logprof_value_or_all(self.domain, self.all_domains)
sock_type = logprof_value_or_all(self.type_or_protocol, self.all_type_or_protocols)
return [
_('Network Family'), family,
_('Socket Type'), sock_type,
]
class NetworkRuleset(BaseRuleset):
'''Class to handle and store a collection of network rules'''
def get_glob(self, path_or_rule):
'''Return the next possible glob. For network rules, that's "network DOMAIN," or "network," (all network)'''
# XXX return 'network DOMAIN,' if 'network DOMAIN TYPE_OR_PROTOCOL' was given
return 'network,'
|