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# Copyright 2015, Tresys Technology, LLC
#
# SPDX-License-Identifier: GPL-2.0-only
#
from unittest.mock import Mock
import pytest
import setools
from setools import PermissionMap, TERuletype
from setools.exception import PermissionMapParseError, RuleTypeError, \
UnmappedClass, UnmappedPermission
@pytest.mark.obj_args("tests/library/permmap.conf")
class TestPermissionMap:
"""Permission map unit tests."""
def validate_permmap_entry(self, permmap: dict, cls: str, perm: str, direction: str,
weight: int, enabled: bool) -> None:
"""Validate a permission map entry and settings."""
assert cls in permmap
assert perm in permmap[cls]
assert 'direction' in permmap[cls][perm]
assert 'weight' in permmap[cls][perm]
assert 'enabled' in permmap[cls][perm]
assert permmap[cls][perm]['direction'] == direction
assert permmap[cls][perm]['weight'] == weight
assert permmap[cls][perm]['enabled'] == enabled
def test_load(self) -> None:
"""PermMap open from path."""
permmap = PermissionMap("tests/library/perm_map")
# validate permission map contents
assert 5 == len(permmap._permmap)
# class infoflow
assert "infoflow" in permmap._permmap
assert 6 == len(permmap._permmap['infoflow'])
self.validate_permmap_entry(permmap._permmap, 'infoflow', 'low_w', 'w', 1, True)
self.validate_permmap_entry(permmap._permmap, 'infoflow', 'med_w', 'w', 5, True)
self.validate_permmap_entry(permmap._permmap, 'infoflow', 'hi_w', 'w', 10, True)
self.validate_permmap_entry(permmap._permmap, 'infoflow', 'low_r', 'r', 1, True)
self.validate_permmap_entry(permmap._permmap, 'infoflow', 'med_r', 'r', 5, True)
self.validate_permmap_entry(permmap._permmap, 'infoflow', 'hi_r', 'r', 10, True)
# class infoflow2
assert "infoflow2" in permmap._permmap
assert 7 == len(permmap._permmap['infoflow2'])
self.validate_permmap_entry(permmap._permmap, 'infoflow2', 'low_w', 'w', 1, True)
self.validate_permmap_entry(permmap._permmap, 'infoflow2', 'med_w', 'w', 5, True)
self.validate_permmap_entry(permmap._permmap, 'infoflow2', 'hi_w', 'w', 10, True)
self.validate_permmap_entry(permmap._permmap, 'infoflow2', 'low_r', 'r', 1, True)
self.validate_permmap_entry(permmap._permmap, 'infoflow2', 'med_r', 'r', 5, True)
self.validate_permmap_entry(permmap._permmap, 'infoflow2', 'hi_r', 'r', 10, True)
self.validate_permmap_entry(permmap._permmap, 'infoflow2', 'super', 'b', 10, True)
# class infoflow3
assert "infoflow3" in permmap._permmap
assert 1 == len(permmap._permmap['infoflow3'])
self.validate_permmap_entry(permmap._permmap, 'infoflow3', 'null', 'n', 1, True)
# class file
assert "file" in permmap._permmap
assert 2 == len(permmap._permmap['file'])
self.validate_permmap_entry(permmap._permmap, 'file', 'execute', 'r', 10, True)
self.validate_permmap_entry(permmap._permmap, 'file', 'entrypoint', 'r', 10, True)
# class process
assert "process" in permmap._permmap
assert 1 == len(permmap._permmap['process'])
self.validate_permmap_entry(permmap._permmap, 'process', 'transition', 'w', 10, True)
def test_load_invalid(self) -> None:
"""PermMap load completely wrong file type"""
with pytest.raises(PermissionMapParseError):
PermissionMap("setup.py")
def test_load_negative_class_count(self) -> None:
"""PermMap load negative class count"""
with pytest.raises(PermissionMapParseError):
PermissionMap("tests/library/invalid_perm_maps/negative-classcount")
def test_load_non_number_class_count(self) -> None:
"""PermMap load non-number class count"""
with pytest.raises(PermissionMapParseError):
PermissionMap("tests/library/invalid_perm_maps/non-number-classcount")
def test_load_extra_class(self) -> None:
"""PermMap load extra class"""
with pytest.raises(PermissionMapParseError):
PermissionMap("tests/library/invalid_perm_maps/extra-class")
def test_load_bad_class_keyword(self) -> None:
"""PermMap load bad class keyword"""
with pytest.raises(PermissionMapParseError):
PermissionMap("tests/library/invalid_perm_maps/bad-class-keyword")
# test 6: bad class name(?)
def test_load_negative_perm_count(self) -> None:
"""PermMap load negative permission count"""
with pytest.raises(PermissionMapParseError):
PermissionMap("tests/library/invalid_perm_maps/negative-permcount")
def test_load_bad_perm_count(self) -> None:
"""PermMap load bad permission count"""
with pytest.raises(PermissionMapParseError):
PermissionMap("tests/library/invalid_perm_maps/bad-permcount")
# test 9: bad perm name(?)
def test_load_extra_perms(self) -> None:
"""PermMap load negative permission count"""
with pytest.raises(PermissionMapParseError):
PermissionMap("tests/library/invalid_perm_maps/extra-perms")
def test_load_invalid_flow_direction(self) -> None:
"""PermMap load invalid flow direction"""
with pytest.raises(PermissionMapParseError):
PermissionMap("tests/library/invalid_perm_maps/invalid-flowdir")
def test_load_bad_perm_weight(self) -> None:
"""PermMap load too high/low permission weight"""
with pytest.raises(PermissionMapParseError):
PermissionMap("tests/library/invalid_perm_maps/bad-perm-weight-high")
with pytest.raises(PermissionMapParseError):
PermissionMap("tests/library/invalid_perm_maps/bad-perm-weight-low")
def test_load_invalid_weight(self) -> None:
"""PermMap load invalid permission weight"""
with pytest.raises(PermissionMapParseError):
PermissionMap("tests/library/invalid_perm_maps/invalid-perm-weight")
def test_set_weight(self) -> None:
"""PermMap set weight"""
permmap = PermissionMap("tests/library/perm_map")
self.validate_permmap_entry(permmap._permmap, 'infoflow2', 'low_w', 'w', 1, True)
permmap.set_weight("infoflow2", "low_w", 10)
self.validate_permmap_entry(permmap._permmap, 'infoflow2', 'low_w', 'w', 10, True)
def test_set_weight_low(self) -> None:
"""PermMap set weight low"""
permmap = PermissionMap("tests/library/perm_map")
with pytest.raises(ValueError):
permmap.set_weight("infoflow2", "low_w", 0)
with pytest.raises(ValueError):
permmap.set_weight("infoflow2", "low_w", -10)
def test_set_weight_high(self) -> None:
"""PermMap set weight high"""
permmap = PermissionMap("tests/library/perm_map")
with pytest.raises(ValueError):
permmap.set_weight("infoflow2", "low_w", 11)
with pytest.raises(ValueError):
permmap.set_weight("infoflow2", "low_w", 50)
def test_set_weight_unmapped_class(self) -> None:
"""PermMap set weight unmapped class"""
permmap = PermissionMap("tests/library/perm_map")
with pytest.raises(UnmappedClass):
permmap.set_weight("UNMAPPED", "write", 10)
def test_set_weight_unmapped_permission(self) -> None:
"""PermMap set weight unmapped class"""
permmap = PermissionMap("tests/library/perm_map")
with pytest.raises(UnmappedPermission):
permmap.set_weight("infoflow2", "UNMAPPED", 10)
def test_set_direction(self) -> None:
"""PermMap set direction"""
permmap = PermissionMap("tests/library/perm_map")
self.validate_permmap_entry(permmap._permmap, 'infoflow2', 'low_w', 'w', 1, True)
permmap.set_direction("infoflow2", "low_w", "r")
self.validate_permmap_entry(permmap._permmap, 'infoflow2', 'low_w', 'r', 1, True)
def test_set_direction_invalid(self) -> None:
"""PermMap set invalid direction"""
permmap = PermissionMap("tests/library/perm_map")
with pytest.raises(ValueError):
permmap.set_direction("infoflow2", "low_w", "X")
def test_set_direction_unmapped_class(self) -> None:
"""PermMap set direction unmapped class"""
permmap = PermissionMap("tests/library/perm_map")
with pytest.raises(UnmappedClass):
permmap.set_direction("UNMAPPED", "write", "w")
def test_set_direction_unmapped_permission(self) -> None:
"""PermMap set direction unmapped class"""
permmap = PermissionMap("tests/library/perm_map")
with pytest.raises(UnmappedPermission):
permmap.set_direction("infoflow2", "UNMAPPED", "w")
def test_exclude_perm(self) -> None:
"""PermMap exclude permission."""
permmap = PermissionMap("tests/library/perm_map")
permmap.exclude_permission("infoflow", "med_w")
self.validate_permmap_entry(permmap._permmap, 'infoflow', 'med_w', 'w', 5, False)
def test_exclude_perm_unmapped_class(self) -> None:
"""PermMap exclude permission unmapped class."""
permmap = PermissionMap("tests/library/perm_map")
with pytest.raises(UnmappedClass):
permmap.exclude_permission("UNMAPPED", "med_w")
def test_exclude_perm_unmapped_perm(self) -> None:
"""PermMap exclude permission unmapped permission."""
permmap = PermissionMap("tests/library/perm_map")
with pytest.raises(UnmappedPermission):
permmap.exclude_permission("infoflow", "UNMAPPED")
def test_include_perm(self) -> None:
"""PermMap include permission."""
permmap = PermissionMap("tests/library/perm_map")
permmap.exclude_permission("infoflow", "med_w")
self.validate_permmap_entry(permmap._permmap, 'infoflow', 'med_w', 'w', 5, False)
permmap.include_permission("infoflow", "med_w")
self.validate_permmap_entry(permmap._permmap, 'infoflow', 'med_w', 'w', 5, True)
def test_include_perm_unmapped_class(self) -> None:
"""PermMap include permission unmapped class."""
permmap = PermissionMap("tests/library/perm_map")
with pytest.raises(UnmappedClass):
permmap.include_permission("UNMAPPED", "med_w")
def test_include_perm_unmapped_perm(self) -> None:
"""PermMap include permission unmapped permission."""
permmap = PermissionMap("tests/library/perm_map")
with pytest.raises(UnmappedPermission):
permmap.include_permission("infoflow", "UNMAPPED")
def test_exclude_class(self) -> None:
"""PermMap exclude class."""
permmap = PermissionMap("tests/library/perm_map")
permmap.exclude_class("file")
self.validate_permmap_entry(permmap._permmap, 'file', 'execute', 'r', 10, False)
self.validate_permmap_entry(permmap._permmap, 'file', 'entrypoint', 'r', 10, False)
def test_exclude_class_unmapped_class(self) -> None:
"""PermMap exclude class unmapped class."""
permmap = PermissionMap("tests/library/perm_map")
with pytest.raises(UnmappedClass):
permmap.exclude_class("UNMAPPED")
def test_include_class(self) -> None:
"""PermMap exclude class."""
permmap = PermissionMap("tests/library/perm_map")
permmap.exclude_class("file")
self.validate_permmap_entry(permmap._permmap, 'file', 'execute', 'r', 10, False)
self.validate_permmap_entry(permmap._permmap, 'file', 'entrypoint', 'r', 10, False)
permmap.include_class("file")
self.validate_permmap_entry(permmap._permmap, 'file', 'execute', 'r', 10, True)
self.validate_permmap_entry(permmap._permmap, 'file', 'entrypoint', 'r', 10, True)
def test_include_class_unmapped_class(self) -> None:
"""PermMap include class unmapped class."""
permmap = PermissionMap("tests/library/perm_map")
with pytest.raises(UnmappedClass):
permmap.include_class("UNMAPPED")
def test_weight_read_only(self) -> None:
"""PermMap get weight of read-only rule."""
rule = Mock()
rule.ruletype = TERuletype.allow
rule.tclass = "infoflow"
rule.perms = set(["med_r", "hi_r"])
permmap = PermissionMap("tests/library/perm_map")
weight = permmap.rule_weight(rule)
assert weight.read == 10
assert weight.write == 0
def test_weight_write_only(self) -> None:
"""PermMap get weight of write-only rule."""
rule = Mock()
rule.ruletype = TERuletype.allow
rule.tclass = "infoflow"
rule.perms = set(["low_w", "med_w"])
permmap = PermissionMap("tests/library/perm_map")
weight = permmap.rule_weight(rule)
assert weight.read == 0
assert weight.write == 5
def test_weight_both(self) -> None:
"""PermMap get weight of both rule."""
rule = Mock()
rule.ruletype = TERuletype.allow
rule.tclass = "infoflow"
rule.perms = set(["low_r", "hi_w"])
permmap = PermissionMap("tests/library/perm_map")
weight = permmap.rule_weight(rule)
assert weight.read == 1
assert weight.write == 10
def test_weight_none(self) -> None:
"""PermMap get weight of none rule."""
rule = Mock()
rule.ruletype = TERuletype.allow
rule.tclass = "infoflow3"
rule.perms = set(["null"])
permmap = PermissionMap("tests/library/perm_map")
weight = permmap.rule_weight(rule)
assert weight.read == 0
assert weight.write == 0
def test_weight_unmapped_class(self) -> None:
"""PermMap get weight of rule with unmapped class."""
rule = Mock()
rule.ruletype = TERuletype.allow
rule.tclass = "unmapped"
rule.perms = set(["null"])
permmap = PermissionMap("tests/library/perm_map")
pytest.raises(UnmappedClass, permmap.rule_weight, rule)
def test_weight_unmapped_permission(self) -> None:
"""PermMap get weight of rule with unmapped permission."""
rule = Mock()
rule.ruletype = TERuletype.allow
rule.tclass = "infoflow"
rule.perms = set(["low_r", "unmapped"])
permmap = PermissionMap("tests/library/perm_map")
pytest.raises(UnmappedPermission, permmap.rule_weight, rule)
def test_weight_wrong_rule_type(self) -> None:
"""PermMap get weight of rule with wrong rule type."""
rule = Mock()
rule.ruletype = TERuletype.type_transition
rule.tclass = "infoflow"
permmap = PermissionMap("tests/library/perm_map")
pytest.raises(RuleTypeError, permmap.rule_weight, rule)
def test_weight_excluded_permission(self) -> None:
"""PermMap get weight of a rule with excluded permission."""
rule = Mock()
rule.ruletype = TERuletype.allow
rule.tclass = "infoflow"
rule.perms = set(["med_r", "hi_r"])
permmap = PermissionMap("tests/library/perm_map")
permmap.exclude_permission("infoflow", "hi_r")
weight = permmap.rule_weight(rule)
assert weight.read == 5
assert weight.write == 0
def test_weight_excluded_class(self) -> None:
"""PermMap get weight of a rule with excluded class."""
rule = Mock()
rule.ruletype = TERuletype.allow
rule.tclass = "infoflow"
rule.perms = set(["low_r", "med_r", "hi_r", "low_w", "med_w", "hi_w"])
permmap = PermissionMap("tests/library/perm_map")
permmap.exclude_class("infoflow")
weight = permmap.rule_weight(rule)
assert weight.read == 0
assert weight.write == 0
def test_map_policy(self, compiled_policy: setools.SELinuxPolicy) -> None:
"""PermMap create mappings for classes/perms in a policy."""
permmap = PermissionMap("tests/library/perm_map")
permmap.map_policy(compiled_policy)
self.validate_permmap_entry(permmap._permmap, 'infoflow2', 'new_perm', 'u', 1, True)
assert "new_class" in permmap._permmap
assert 1 == len(permmap._permmap['new_class'])
self.validate_permmap_entry(permmap._permmap, 'new_class', 'new_class_perm', 'u', 1, True)
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