mirror of
https://github.com/SELinuxProject/setools
synced 2025-03-21 10:37:11 +00:00
323 lines
11 KiB
Python
323 lines
11 KiB
Python
# Copyright 2015, Tresys Technology, LLC
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#
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# This file is part of SETools.
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#
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# SETools is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Lesser General Public License as
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# published by the Free Software Foundation, either version 2.1 of
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# the License, or (at your option) any later version.
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#
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# SETools is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with SETools. If not, see
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# <http://www.gnu.org/licenses/>.
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#
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import logging
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from PyQt5.QtCore import pyqtSignal, Qt, QObject, QStringListModel, QThread
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from PyQt5.QtGui import QPalette, QTextCursor
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from PyQt5.QtWidgets import QCompleter, QHeaderView, QMessageBox, QProgressDialog, QScrollArea
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from setools import InfoFlowAnalysis
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from ..logtosignal import LogHandlerToSignal
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from .excludetypes import ExcludeTypes
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from ..widget import SEToolsWidget
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class InfoFlowAnalysisTab(SEToolsWidget, QScrollArea):
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"""An information flow analysis tab."""
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@property
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def perm_map(self):
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return self.query.perm_map
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@perm_map.setter
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def perm_map(self, pmap):
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self.query.perm_map = pmap
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def __init__(self, parent, policy, perm_map):
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super(InfoFlowAnalysisTab, self).__init__(parent)
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self.log = logging.getLogger(__name__)
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self.policy = policy
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self.query = InfoFlowAnalysis(policy, perm_map)
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self.query.source = None
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self.query.target = None
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self.setupUi()
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def __del__(self):
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self.thread.quit()
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self.thread.wait(5000)
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logging.getLogger("setools.infoflow").removeHandler(self.handler)
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def setupUi(self):
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self.log.debug("Initializing UI.")
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self.load_ui("infoflow.ui")
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# set up error message for missing perm map
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self.error_msg = QMessageBox(self)
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self.error_msg.setStandardButtons(QMessageBox.Ok)
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# set up source/target autocompletion
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type_completion_list = [str(t) for t in self.policy.types()]
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type_completer_model = QStringListModel(self)
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type_completer_model.setStringList(sorted(type_completion_list))
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self.type_completion = QCompleter()
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self.type_completion.setModel(type_completer_model)
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self.source.setCompleter(self.type_completion)
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self.target.setCompleter(self.type_completion)
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# setup indications of errors on source/target/default
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self.orig_palette = self.source.palette()
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self.error_palette = self.source.palette()
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self.error_palette.setColor(QPalette.Base, Qt.red)
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self.clear_source_error()
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self.clear_target_error()
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# set up processing thread
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self.thread = QThread()
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self.worker = ResultsUpdater(self.query)
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self.worker.moveToThread(self.thread)
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self.worker.raw_line.connect(self.raw_results.appendPlainText)
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self.worker.finished.connect(self.update_complete)
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self.worker.finished.connect(self.thread.quit)
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self.thread.started.connect(self.worker.update)
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# create a "busy, please wait" dialog
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self.busy = QProgressDialog(self)
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self.busy.setModal(True)
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self.busy.setRange(0, 0)
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self.busy.setMinimumDuration(0)
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self.busy.canceled.connect(self.thread.requestInterruption)
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self.busy.reset()
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# update busy dialog from infoflow INFO logs
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self.handler = LogHandlerToSignal()
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self.handler.message.connect(self.busy.setLabelText)
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logging.getLogger("setools.infoflow").addHandler(self.handler)
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# Ensure settings are consistent with the initial .ui state
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self.max_path_length.setEnabled(self.all_paths.isChecked())
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self.source.setEnabled(not self.flows_in.isChecked())
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self.target.setEnabled(not self.flows_out.isChecked())
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self.criteria_frame.setHidden(not self.criteria_expander.isChecked())
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self.notes.setHidden(not self.notes_expander.isChecked())
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# connect signals
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self.buttonBox.clicked.connect(self.run)
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self.source.textEdited.connect(self.clear_source_error)
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self.source.editingFinished.connect(self.set_source)
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self.target.textEdited.connect(self.clear_target_error)
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self.target.editingFinished.connect(self.set_target)
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self.all_paths.toggled.connect(self.all_paths_toggled)
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self.flows_in.toggled.connect(self.flows_in_toggled)
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self.flows_out.toggled.connect(self.flows_out_toggled)
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self.min_perm_weight.valueChanged.connect(self.set_min_weight)
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self.exclude_types.clicked.connect(self.choose_excluded_types)
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#
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# Analysis mode
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#
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def all_paths_toggled(self, value):
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self.clear_source_error()
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self.clear_target_error()
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self.max_path_length.setEnabled(value)
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def flows_in_toggled(self, value):
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self.clear_source_error()
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self.clear_target_error()
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self.source.setEnabled(not value)
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def flows_out_toggled(self, value):
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self.clear_source_error()
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self.clear_target_error()
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self.target.setEnabled(not value)
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#
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# Source criteria
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#
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def set_source_error(self, error_text):
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self.log.error("Source type error: {0}".format(error_text))
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self.source.setToolTip("Error: {0}".format(error_text))
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self.source.setPalette(self.error_palette)
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def clear_source_error(self):
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self.source.setToolTip("The source type of the analysis.")
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self.source.setPalette(self.orig_palette)
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def set_source(self):
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try:
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# look up the type here, so invalid types can be caught immediately
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text = self.source.text()
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if text:
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self.query.source = self.policy.lookup_type(text)
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else:
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self.query.source = None
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except Exception as ex:
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self.set_source_error(ex)
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#
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# Target criteria
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#
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def set_target_error(self, error_text):
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self.log.error("Target type error: {0}".format(error_text))
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self.target.setToolTip("Error: {0}".format(error_text))
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self.target.setPalette(self.error_palette)
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def clear_target_error(self):
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self.target.setToolTip("The target type of the analysis.")
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self.target.setPalette(self.orig_palette)
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def set_target(self):
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try:
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# look up the type here, so invalid types can be caught immediately
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text = self.target.text()
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if text:
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self.query.target = self.policy.lookup_type(text)
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else:
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self.query.target = None
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except Exception as ex:
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self.set_target_error(ex)
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#
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# Options
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#
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def set_min_weight(self, value):
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self.query.min_weight = value
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def choose_excluded_types(self):
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chooser = ExcludeTypes(self, self.policy)
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chooser.show()
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#
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# Results runner
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#
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def run(self, button):
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# right now there is only one button.
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fail = False
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if self.source.isEnabled() and not self.query.source:
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self.set_source_error("A source type is required")
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fail = True
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if self.target.isEnabled() and not self.query.target:
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self.set_target_error("A target type is required.")
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fail = True
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if not self.perm_map:
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self.log.critical("A permission map is required to begin the analysis.")
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self.error_msg.critical(self,
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"No permission map available.",
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"Please load a permission map to begin the analysis.")
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fail = True
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if fail:
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return
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for mode in [self.all_paths, self.all_shortest_paths, self.flows_in, self.flows_out]:
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if mode.isChecked():
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break
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self.query.mode = mode.objectName()
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self.query.max_path_len = self.max_path_length.value()
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self.query.limit = self.limit_paths.value()
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# start processing
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self.busy.setLabelText("Processing query...")
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self.busy.show()
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self.raw_results.clear()
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self.thread.start()
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def update_complete(self):
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if not self.busy.wasCanceled():
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self.busy.setLabelText("Moving the raw result to top; GUI may be unresponsive")
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self.busy.repaint()
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self.raw_results.moveCursor(QTextCursor.Start)
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self.busy.reset()
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class ResultsUpdater(QObject):
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"""
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Thread for processing queries and updating result widgets.
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Parameters:
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query The query object
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model The model for the results
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Qt signals:
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finished The update has completed.
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raw_line (str) A string to be appended to the raw results.
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"""
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finished = pyqtSignal()
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raw_line = pyqtSignal(str)
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def __init__(self, query):
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super(ResultsUpdater, self).__init__()
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self.query = query
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self.log = logging.getLogger(__name__)
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def update(self):
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"""Run the query and update results."""
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assert self.query.limit, "Code doesn't currently handle unlimited (limit=0) paths."
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if self.query.mode == "all_paths":
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self.transitive(self.query.all_paths(self.query.source, self.query.target,
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self.query.max_path_len))
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elif self.query.mode == "all_shortest_paths":
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self.transitive(self.query.all_shortest_paths(self.query.source, self.query.target))
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elif self.query.mode == "flows_out":
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self.direct(self.query.infoflows(self.query.source, out=True))
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else: # flows_in
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self.direct(self.query.infoflows(self.query.target, out=False))
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self.finished.emit()
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def transitive(self, paths):
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pathnum = 0
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for pathnum, path in enumerate(paths, start=1):
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self.raw_line.emit("Flow {0}:".format(pathnum))
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for stepnum, step in enumerate(path, start=1):
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self.raw_line.emit(" Step {0}: {1} -> {2}".format(stepnum,
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step.source,
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step.target))
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for rule in sorted(step.rules):
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self.raw_line.emit(" {0}".format(rule))
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self.raw_line.emit("")
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if QThread.currentThread().isInterruptionRequested() or (pathnum >= self.query.limit):
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break
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else:
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QThread.yieldCurrentThread()
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self.raw_line.emit("")
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self.raw_line.emit("{0} information flow path(s) found.\n".format(pathnum))
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self.log.info("{0} information flow path(s) found.".format(pathnum))
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def direct(self, flows):
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flownum = 0
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for flownum, flow in enumerate(flows, start=1):
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self.raw_line.emit("Flow {0}: {1} -> {2}".format(flownum, flow.source, flow.target))
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for rule in sorted(flow.rules):
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self.raw_line.emit(" {0}".format(rule))
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self.raw_line.emit("")
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if QThread.currentThread().isInterruptionRequested() or (flownum >= self.query.limit):
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break
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else:
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QThread.yieldCurrentThread()
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self.raw_line.emit("{0} information flow(s) found.\n".format(flownum))
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self.log.info("{0} information flow(s) found.".format(flownum))
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