/usr/lib/python3/dist-packages/setools/mixins.py is in python3-setools 4.0.1-6.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 | # Copyright 2015, Tresys Technology, LLC
#
# This file is part of SETools.
#
# SETools is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as
# published by the Free Software Foundation, either version 2.1 of
# the License, or (at your option) any later version.
#
# SETools 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 Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with SETools. If not, see
# <http://www.gnu.org/licenses/>.
#
# pylint: disable=attribute-defined-outside-init,no-member
import re
from .descriptors import CriteriaDescriptor, CriteriaSetDescriptor
from .util import match_in_set, match_regex, match_range, match_regex_or_set
class MatchAlias(object):
"""Mixin for matching an object's aliases."""
alias = CriteriaDescriptor("alias_regex")
alias_regex = False
def _match_alias_debug(self, log):
"""Emit log debugging info for alias matching."""
log.debug("Alias: {0.alias}, regex: {0.alias_regex}".format(self))
def _match_alias(self, obj):
"""
Match the alias criteria
Parameter:
obj An object with an alias generator method named "aliases"
"""
if not self.alias:
# if there is no criteria, everything matches.
return True
return match_in_set(obj.aliases(), self.alias, self.alias_regex)
class MatchContext(object):
"""
Mixin for matching contexts.
Class attributes:
user The user to match in the context.
user_regex If true, regular expression matching
will be used on the user.
role The role to match in the context.
role_regex If true, regular expression matching
will be used on the role.
type_ The type to match in the context.
type_regex If true, regular expression matching
will be used on the type.
range_ The range to match in the context.
range_subset If true, the criteria will match if it
is a subset of the context's range.
range_overlap If true, the criteria will match if it
overlaps any of the context's range.
range_superset If true, the criteria will match if it
is a superset of the context's range.
range_proper If true, use proper superset/subset
on range matching operations.
No effect if not using set operations.
"""
user = CriteriaDescriptor("user_regex", "lookup_user")
user_regex = False
role = CriteriaDescriptor("role_regex", "lookup_role")
role_regex = False
type_ = CriteriaDescriptor("type_regex", "lookup_type")
type_regex = False
range_ = CriteriaDescriptor(lookup_function="lookup_range")
range_overlap = False
range_subset = False
range_superset = False
range_proper = False
def _match_context_debug(self, log):
"""Emit log debugging info for context matching."""
log.debug("User: {0.user!r}, regex: {0.user_regex}".format(self))
log.debug("Role: {0.role!r}, regex: {0.role_regex}".format(self))
log.debug("Type: {0.type_!r}, regex: {0.type_regex}".format(self))
log.debug("Range: {0.range_!r}, subset: {0.range_subset}, overlap: {0.range_overlap}, "
"superset: {0.range_superset}, proper: {0.range_proper}".format(self))
def _match_context(self, context):
"""
Match the context criteria.
Parameter:
obj An object with context attributes "user", "role",
"type_" and "range_".
"""
if self.user and not match_regex(
context.user,
self.user,
self.user_regex):
return False
if self.role and not match_regex(
context.role,
self.role,
self.role_regex):
return False
if self.type_ and not match_regex(
context.type_,
self.type_,
self.type_regex):
return False
if self.range_ and not match_range(
context.range_,
self.range_,
self.range_subset,
self.range_overlap,
self.range_superset,
self.range_proper):
return False
return True
class MatchName(object):
"""Mixin for matching an object's name."""
name = CriteriaDescriptor("name_regex")
name_regex = False
def _match_name_debug(self, log):
"""Log debugging messages for name matching."""
log.debug("Name: {0.name!r}, regex: {0.name_regex}".format(self))
def _match_name(self, obj):
"""Match the object to the name criteria."""
if not self.name:
# if there is no criteria, everything matches.
return True
return match_regex(obj, self.name, self.name_regex)
class MatchObjClass(object):
"""Mixin for matching an object's class."""
tclass = CriteriaSetDescriptor("tclass_regex", "lookup_class")
tclass_regex = False
def _match_object_class_debug(self, log):
"""Emit log debugging info for permission matching."""
log.debug("Class: {0.tclass!r}, regex: {0.tclass_regex}".format(self))
def _match_object_class(self, obj):
"""
Match the object class criteria
Parameter:
obj An object with an object class attribute named "tclass"
"""
if not self.tclass:
# if there is no criteria, everything matches.
return True
elif self.tclass_regex:
return bool(self.tclass.search(str(obj.tclass)))
else:
return obj.tclass in self.tclass
class MatchPermission(object):
"""Mixin for matching an object's permissions."""
perms = CriteriaSetDescriptor("perms_regex")
perms_equal = False
perms_regex = False
perms_subset = False
def _match_perms_debug(self, log):
"""Emit log debugging info for permission matching."""
log.debug("Perms: {0.perms!r}, regex: {0.perms_regex}, eq: {0.perms_equal}, "
"subset: {0.perms_subset!r}".format(self))
def _match_perms(self, obj):
"""
Match the permission criteria
Parameter:
obj An object with a permission set class attribute named "perms"
"""
if not self.perms:
# if there is no criteria, everything matches.
return True
if self.perms_subset:
return obj.perms >= self.perms
else:
return match_regex_or_set(obj.perms, self.perms, self.perms_equal, self.perms_regex)
|