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# SPDX-License-Identifier: LGPL-2.1-only
# Copyright 2016, Tresys Technology, LLC
import copy
import logging
from PyQt6 import QtCore, QtGui, QtWidgets
from setools import PermissionMap
from . import models, views
class PermissionMapEditor(QtWidgets.QDialog):
"""
A permission map editor. This dialog has two versions,
one for editing the weight/direction and another for
including or excluding permissions in an analysis.
Parameters:
parent The parent Qt widget
edit (bool) If true, the dialog will take
the editor behavior. If False, the dialog
will take the enable/disable permission
behavior.
"""
apply_permmap = QtCore.pyqtSignal(PermissionMap)
class_toggle = QtCore.pyqtSignal(bool)
def __init__(self, perm_map: PermissionMap, edit: bool = False,
parent: QtWidgets.QWidget | None = None) -> None:
super().__init__(parent)
self.log = logging.getLogger(__name__)
self.edit = edit
# keep an internal copy because the map is mutable
# and this dialog may be canceled after some edits.
self.perm_map = copy.deepcopy(perm_map)
if self.edit:
self.setWindowTitle(f"{self.perm_map} - Permission Map Editor - apol")
else:
self.setWindowTitle(f"{self.perm_map} - Permission Map Viewer - apol")
top_layout = QtWidgets.QVBoxLayout(self)
#
# Title
#
title = QtWidgets.QLabel(self)
title.setObjectName("title")
top_layout.addWidget(title)
if self.edit:
title.setText("Permission Map Editor")
else:
title.setText("Permission Map Viewer")
frame = QtWidgets.QFrame(self)
frame.setFrameShape(QtWidgets.QFrame.Shape.StyledPanel)
frame.setFrameShadow(QtWidgets.QFrame.Shadow.Raised)
frame_layout = QtWidgets.QGridLayout(frame)
# set up class list
self.classes = views.SEToolsListView(frame)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Policy.Maximum,
QtWidgets.QSizePolicy.Policy.Preferred)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.classes.sizePolicy().hasHeightForWidth())
self.classes.setSizePolicy(sizePolicy)
self.classes.setModel(models.StringList(data=sorted(self.perm_map.classes()), parent=self))
self.classes.selectionModel().selectionChanged.connect(self.class_selected)
frame_layout.addWidget(self.classes, 0, 1, 1, 1)
# Enable all button
self.enable_all = QtWidgets.QPushButton(frame)
self.enable_all.setText("Include All Permissions")
frame_layout.addWidget(self.enable_all, 1, 2, 1, 1)
# Disable all button
self.disable_all = QtWidgets.QPushButton(frame)
self.disable_all.setText("Exclude All Permissions")
frame_layout.addWidget(self.disable_all, 1, 3, 1, 1)
# permission widgets
self.widgets = list[PermissionMapping | QtWidgets.QFrame]()
scrollArea = QtWidgets.QScrollArea(frame)
scrollArea.setWidgetResizable(True)
scrollArea.setAlignment(
QtCore.Qt.AlignmentFlag.AlignLeft |
QtCore.Qt.AlignmentFlag.AlignTop)
scrollAreaWidgetContents = QtWidgets.QWidget()
scrollAreaWidgetContents.setGeometry(QtCore.QRect(0, 0, 463, 331))
self.perm_mappings = QtWidgets.QVBoxLayout(scrollAreaWidgetContents)
scrollArea.setWidget(scrollAreaWidgetContents)
frame_layout.addWidget(scrollArea, 0, 2, 1, 2)
top_layout.addWidget(frame)
self.buttonBox = QtWidgets.QDialogButtonBox(self)
self.buttonBox.setOrientation(QtCore.Qt.Orientation.Horizontal)
self.buttonBox.setStandardButtons(
QtWidgets.QDialogButtonBox.StandardButton.Cancel |
QtWidgets.QDialogButtonBox.StandardButton.Ok)
top_layout.addWidget(self.buttonBox)
# set up editor mode
self.enable_all.setHidden(self.edit)
self.disable_all.setHidden(self.edit)
# connect signals
self.enable_all.clicked.connect(self.enable_all_perms)
self.disable_all.clicked.connect(self.disable_all_perms)
self.buttonBox.accepted.connect(self.accept)
self.buttonBox.rejected.connect(self.reject)
QtCore.QMetaObject.connectSlotsByName(self)
def accept(self) -> None:
"""Accept the dialog and emit the perm_map signal."""
self.apply_permmap.emit(self.perm_map)
super().accept()
def class_selected(self) -> None:
"""Handle a class being selected."""
# the widget is set to 1 selection
selection_model = self.classes.selectionModel()
assert selection_model, "No selection model set, this is an SETools bug." # type narrowing
data_model = self.classes.model()
assert data_model, "No data model set, this is an SETools bug." # type narrowing
for index in selection_model.selectedIndexes():
class_name = data_model.data(index, models.ModelRoles.DisplayRole)
self.log.debug(f"Setting class to {class_name}")
self.enable_all.setToolTip(f"Include all permissions in the {class_name} class.")
self.disable_all.setToolTip(f"Exclude all permissions in the {class_name} class.")
self._clear_mappings()
# populate new mappings
for perm in sorted(self.perm_map.perms(class_name)):
# create permission mapping
mapping = PermissionMapping(perm, self.edit, self)
mapping.setAttribute(QtCore.Qt.WidgetAttribute.WA_DeleteOnClose)
self.class_toggle.connect(mapping.enabled.setChecked)
self.perm_mappings.addWidget(mapping)
self.widgets.append(mapping)
# add horizontal line
line = QtWidgets.QFrame(self)
line.setFrameShape(QtWidgets.QFrame.Shape.HLine)
line.setFrameShadow(QtWidgets.QFrame.Shadow.Sunken)
self.perm_mappings.addWidget(line)
self.widgets.append(line)
def enable_all_perms(self) -> None:
"""Enable all permissions in the current class."""
self.class_toggle.emit(True)
def disable_all_perms(self) -> None:
"""Disable all permissions in the current class."""
self.class_toggle.emit(False)
#
# Internal functions
#
def _clear_mappings(self):
# delete current mappings
for mapping in self.widgets:
mapping.close()
self.widgets.clear()
index_to_setting = ["r", "w", "b", "n"]
index_to_word = ["Read", "Write", "Both", "None"]
setting_to_index = {"r": 0, "w": 1, "b": 2, "n": 3}
class PermissionMapping(QtWidgets.QWidget):
"""
A widget representing mapping for a particular permission.
This dialog has two versions, one for editing the weight/direction
and another for including or excluding permissions in an analysis.
Parameters:
parent The parent Qt widget
edit (bool) If true, the widget will take
the editor behavior. If False, the dialog
will take the enable/disable permission
behavior.
"""
def __init__(self, mapping, edit: bool = False, parent: PermissionMapEditor | None = None):
super().__init__(parent)
self.log = logging.getLogger(__name__)
self.mapping = mapping
self.edit = edit
self.resize(457, 41)
self.horizontalLayout = QtWidgets.QHBoxLayout(self)
self.permission = QtWidgets.QLabel(self)
self.permission.setText(str(self.mapping.perm))
self.horizontalLayout.addWidget(self.permission)
self.direction = QtWidgets.QComboBox(self)
self.horizontalLayout.addWidget(self.direction)
self.weight = QtWidgets.QSpinBox(self)
self.weight.setMinimum(1)
self.weight.setMaximum(10)
self.weight.setSingleStep(1)
self.weight.setValue(self.mapping.weight)
self.horizontalLayout.addWidget(self.weight)
self.enabled = QtWidgets.QCheckBox(self)
self.enabled.setText("Include")
self.enabled.setChecked(self.mapping.enabled)
self.horizontalLayout.addWidget(self.enabled)
if self.edit:
self.weight.setToolTip(
f"Set the information flow weight of \"{self.mapping.perm}\"")
self.direction.setToolTip(
f"Set the information flow direction of \"{self.mapping.perm}\"")
else:
self.enabled.setToolTip(
f"Include or exclude \"{self.mapping.perm}\" from the analysis.")
self.weight.setEnabled(self.edit)
self.direction.setEnabled(self.edit)
self.enabled.setHidden(self.edit)
# setup color palettes for direction
self.orig_palette = self.direction.palette()
self.error_palette = self.direction.palette()
self.error_palette.setColor(QtGui.QPalette.ColorRole.Button,
QtCore.Qt.GlobalColor.red)
self.error_palette.setColor(QtGui.QPalette.ColorRole.ButtonText,
QtCore.Qt.GlobalColor.white)
# setup direction
self.direction.insertItems(0, index_to_word)
if self.mapping.direction == 'u':
# Temporarily add unmapped value to items
self.direction.insertItem(len(index_to_word), "Unmapped")
self.direction.setCurrentText("Unmapped")
self.direction.setPalette(self.error_palette)
self.unmapped = True
else:
self.direction.setCurrentIndex(setting_to_index[self.mapping.direction])
self.unmapped = False
# connect signals
self.direction.currentIndexChanged.connect(self.set_direction)
self.weight.valueChanged.connect(self.set_weight)
self.enabled.toggled.connect(self.set_enabled)
QtCore.QMetaObject.connectSlotsByName(self)
def set_direction(self, value) -> None:
"""Set the direction for the mapping."""
if self.unmapped:
if value == "Unmapped":
return
# Remove unmapped item if setting the mapping.
self.direction.removeItem(len(index_to_word))
self.direction.setPalette(self.orig_palette)
self.unmapped = False
dir_ = index_to_setting[value]
self.log.debug(f"Setting {self.mapping.class_}:{self.mapping.perm} direction to {dir_}")
self.mapping.direction = dir_
def set_weight(self, value: str | int) -> None:
"""Set the weight for the mapping."""
self.log.debug(f"Setting {self.mapping.class_}:{self.mapping.perm} weight to {value}")
self.mapping.weight = int(value)
def set_enabled(self, value: bool) -> None:
"""Set the enabled value for the mapping."""
self.log.debug(f"Setting {self.mapping.class_}:{self.mapping.perm} enabled to {value}")
self.mapping.enabled = value
if __name__ == '__main__':
import sys
import warnings
import setools
logging.basicConfig(level=logging.DEBUG,
format='%(asctime)s|%(levelname)s|%(name)s|%(message)s')
warnings.simplefilter("default")
app = QtWidgets.QApplication(sys.argv)
p = setools.SELinuxPolicy()
m = setools.PermissionMap()
m.map_policy(p)
pview = PermissionMapEditor(m, edit=False)
ped = PermissionMapEditor(m, edit=True)
pview.show()
ped.show()
rc = app.exec()
sys.exit(rc)
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