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EDITING: mixins.py

# Copyright 2015, Tresys Technology, LLC
# Copyright 2019, Chris PeBenito <pebenito@ieee.org>
#
# 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:

"""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:

"""
    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:

"""Mixin for matching an object's name with alias dereferencing."""

name = CriteriaDescriptor("name_regex")
    name_regex = False
    alias_deref = False

def _match_name_debug(self, log):
        """Log debugging messages for name matching."""
        log.debug("Name: {0.name!r}, regex: {0.name_regex}, deref: {0.alias_deref}".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

if self.alias_deref:
            return match_regex(obj, self.name, self.name_regex) or \
                match_in_set(obj.aliases(), self.name, self.name_regex)
        else:
            return match_regex(obj, self.name, self.name_regex)

class MatchObjClass:

"""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:

"""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)

CANCEL

Name	Type	Size	Modified	Actions
↩ ..	DIR	—	—
📁 __pycache__/	DIR	—	2024-07-31 12:30
📁 diff/	DIR	—	2024-07-31 12:30
📄 __init__.py	PY	2.8 KB	2023-10-15 02:31	EDIT
📄 boolquery.py	PY	2.2 KB	2020-04-01 14:57	EDIT
📄 boundsquery.py	PY	2.3 KB	2020-04-01 14:57	EDIT
📄 categoryquery.py	PY	1.9 KB	2020-04-01 14:57	EDIT
📄 commonquery.py	PY	2.1 KB	2020-04-01 14:57	EDIT
📄 constraintquery.py	PY	5.5 KB	2020-04-01 14:57	EDIT
📄 defaultquery.py	PY	2.8 KB	2020-04-01 14:57	EDIT
📄 descriptors.py	PY	7.5 KB	2020-04-01 14:57	EDIT
📄 devicetreeconquery.py	PY	2.7 KB	2020-04-01 14:57	EDIT
📄 dta.py	PY	21.4 KB	2023-10-15 02:31	EDIT
📄 exception.py	PY	6 KB	2020-04-01 14:57	EDIT
📄 fsusequery.py	PY	3.4 KB	2020-04-01 14:57	EDIT
📄 genfsconquery.py	PY	3.7 KB	2020-04-01 14:57	EDIT
📄 ibendportconquery.py	PY	3.5 KB	2020-04-01 14:57	EDIT
📄 ibpkeyconquery.py	PY	5.2 KB	2020-04-01 14:57	EDIT
📄 infoflow.py	PY	14.6 KB	2023-10-15 02:31	EDIT
📄 initsidquery.py	PY	2.8 KB	2020-04-01 14:57	EDIT
📄 iomemconquery.py	PY	4.4 KB	2020-04-01 14:57	EDIT
📄 ioportconquery.py	PY	4.5 KB	2020-04-01 14:57	EDIT
📄 mixins.py	PY	7.1 KB	2020-04-01 14:57	EDIT
📄 mlsrulequery.py	PY	4.6 KB	2020-04-01 14:57	EDIT
📄 netifconquery.py	PY	2.9 KB	2020-04-01 14:57	EDIT
📄 nodeconquery.py	PY	4.2 KB	2020-04-01 14:57	EDIT
📄 objclassquery.py	PY	3.8 KB	2020-04-01 14:57	EDIT
📄 pcideviceconquery.py	PY	3 KB	2020-04-01 14:57	EDIT
📄 perm_map	?	87.2 KB	2020-04-01 14:57	EDIT
📄 permmap.py	PY	16.1 KB	2020-04-01 14:57	EDIT
📄 pirqconquery.py	PY	3 KB	2020-04-01 14:57	EDIT
📄 polcapquery.py	PY	1.6 KB	2020-04-01 14:57	EDIT
📄 policyrep.cpython-36m-x86_64-linux-gnu.so	SO	1.9 MB	2023-10-15 02:32	EDIT
📄 portconquery.py	PY	5 KB	2020-04-01 14:57	EDIT
📄 query.py	PY	1.7 KB	2020-04-01 14:57	EDIT
📄 rbacrulequery.py	PY	5.6 KB	2020-04-01 14:57	EDIT
📄 rolequery.py	PY	2.5 KB	2020-04-01 14:57	EDIT
📄 sensitivityquery.py	PY	2.7 KB	2020-04-01 14:57	EDIT
📄 terulequery.py	PY	9.1 KB	2020-04-01 14:57	EDIT
📄 typeattrquery.py	PY	2.6 KB	2020-04-01 14:57	EDIT
📄 typequery.py	PY	3.4 KB	2020-04-01 14:57	EDIT
📄 userquery.py	PY	4.7 KB	2020-04-01 14:57	EDIT
📄 util.py	PY	5.3 KB	2020-04-01 14:57	EDIT