333 lines
11 KiB
Python
333 lines
11 KiB
Python
#
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# The Qubes OS Project, http://www.qubes-os.org
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#
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# Copyright (C) 2011 Tomasz Sterna <tomek@xiaoka.com>
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program 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 General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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#
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#
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import sys
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import os
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import re
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import xml.etree.ElementTree
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from PyQt4.QtCore import *
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from PyQt4.QtGui import *
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from qubes.qubes import QubesVmCollection
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from qubes.qubes import QubesException
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from qubes.qubes import dry_run
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import ui_editfwrulesdlg
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import ui_newfwruledlg
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class EditFwRulesDlg (QDialog, ui_editfwrulesdlg.Ui_EditFwRulesDlg):
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def __init__(self, parent = None):
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super (EditFwRulesDlg, self).__init__(parent)
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self.setupUi(self)
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self.newRuleButton.clicked.connect(self.new_rule_button_pressed)
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self.editRuleButton.clicked.connect(self.edit_rule_button_pressed)
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self.deleteRuleButton.clicked.connect(self.delete_rule_button_pressed)
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self.policyAllowRadioButton.toggled.connect(self.policy_radio_toggled)
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self.dnsCheckBox.toggled.connect(self.dns_checkbox_toggled)
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def set_model(self, model):
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self.__model = model
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self.rulesTreeView.setModel(model)
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self.rulesTreeView.header().setResizeMode(QHeaderView.ResizeToContents)
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self.rulesTreeView.header().setResizeMode(0, QHeaderView.Stretch)
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self.set_allow(model.allow)
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self.dnsCheckBox.setChecked(model.allowDns)
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self.setWindowTitle(model.get_vm_name() + " firewall")
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def set_allow(self, allow):
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self.policyAllowRadioButton.setChecked(allow)
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self.policyDenyRadioButton.setChecked(not allow)
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def policy_radio_toggled(self, on):
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self.__model.allow = self.policyAllowRadioButton.isChecked()
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def dns_checkbox_toggled(self, on):
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self.__model.allowDns = on
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def new_rule_button_pressed(self):
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dialog = NewFwRuleDlg()
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self.run_rule_dialog(dialog)
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def edit_rule_button_pressed(self):
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dialog = NewFwRuleDlg()
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dialog.set_ok_enabled(True)
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row = self.rulesTreeView.selectedIndexes().pop().row()
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item = self.__model.children[row]
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dialog.addressEdit.setText(item.address)
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service = self.__model.get_service_name(item.portBegin)
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dialog.serviceComboBox.insertItem(0, service)
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dialog.serviceComboBox.setCurrentIndex(0)
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self.run_rule_dialog(dialog, row)
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def run_rule_dialog(self, dialog, row = None):
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if dialog.exec_():
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address = dialog.addressEdit.text()
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service = dialog.serviceComboBox.currentText()
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port = None
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try:
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port = int(service)
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except (TypeError, ValueError) as ex:
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port = self.__model.get_service_port(service)
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if port is not None:
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item = QubesFirewallRuleItem(address, 32, port, None)
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if row is not None:
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self.__model.setChild(row, item)
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else:
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self.__model.appendChild(item)
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else:
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QMessageBox.warning(None, "Invalid service name", "Service '{0} is unknown.".format(service))
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def delete_rule_button_pressed(self):
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for i in set([index.row() for index in self.rulesTreeView.selectedIndexes()]):
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self.__model.removeChild(i)
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class QIPAddressValidator(QValidator):
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def __init__(self, parent = None):
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super (QIPAddressValidator, self).__init__(parent)
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def validate(self, input, pos):
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hostname = input
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if len(hostname) > 255 or len(hostname) == 0:
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return (QValidator.Intermediate, pos)
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if hostname[-1:] == ".":
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hostname = hostname[:-1]
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if hostname[-1:] == "-":
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return (QValidator.Intermediate, pos)
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allowed = re.compile("(?!-)[A-Z\d-]{1,63}(?<!-)$", re.IGNORECASE)
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if all(allowed.match(x) for x in hostname.split(".")):
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return (QValidator.Acceptable, pos)
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return (QValidator.Invalid, pos)
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class NewFwRuleDlg (QDialog, ui_newfwruledlg.Ui_NewFwRuleDlg):
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def __init__(self, parent = None):
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super (NewFwRuleDlg, self).__init__(parent)
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self.setupUi(self)
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self.set_ok_enabled(False)
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self.addressEdit.setValidator(QIPAddressValidator())
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self.addressEdit.editingFinished.connect(self.address_editing_finished)
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self.serviceComboBox.setValidator(QRegExpValidator(QRegExp("[a-z][a-z0-9-]+|[0-9]+", Qt.CaseInsensitive), None))
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self.serviceComboBox.setInsertPolicy(QComboBox.InsertAtBottom)
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self.populate_services_combo()
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self.serviceComboBox.setInsertPolicy(QComboBox.InsertAtTop)
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def populate_services_combo(self):
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displayed_services = [
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'http', 'https', 'ftp', 'ftps',
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'smtp', 'pop3', 'pop3s', 'imap', 'imaps', 'nntp', 'nntps',
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'ssh', 'telnet', 'telnets', 'ntp', 'snmp',
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'ldap', 'ldaps', 'irc', 'ircs', 'xmpp-client',
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'syslog', 'printer', 'nfs', 'x11',
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]
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for service in displayed_services:
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self.serviceComboBox.addItem(service)
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def address_editing_finished(self):
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self.set_ok_enabled(True)
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def set_ok_enabled(self, on):
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ok_button = self.buttonBox.button(QDialogButtonBox.Ok)
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if ok_button is not None:
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ok_button.setEnabled(on)
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class QubesFirewallRuleItem(object):
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def __init__(self, address = str(), netmask = 32, portBegin = 0, portEnd = None):
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self.__address = address
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self.__netmask = netmask
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self.__portBegin = portBegin
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self.__portEnd = portEnd
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@property
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def address(self):
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return self.__address
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@property
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def netmask(self):
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return self.__netmask
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@property
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def portBegin(self):
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return self.__portBegin
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@property
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def portEnd(self):
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return self.__portEnd
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def hasChildren(self):
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return False
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class QubesFirewallRulesModel(QAbstractItemModel):
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def __init__(self, parent=None):
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QAbstractItemModel.__init__(self, parent)
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self.__columnValues = {
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0: lambda x: self.children[x].address,
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1: lambda x: "{0}-{1}".format(self.children[x].portBegin, self.children[x].portEnd) if self.children[x].portEnd is not None \
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else self.get_service_name(self.children[x].portBegin),
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}
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self.__columnNames = {
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0: "Address",
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1: "Service",
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}
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self.__services = list()
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pattern = re.compile("(?P<name>[a-z][a-z0-9-]+)\s+(?P<port>[0-9]+)/(?P<protocol>[a-z]+)", re.IGNORECASE)
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f = open('/etc/services', 'r')
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for line in f:
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match = pattern.match(line)
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if match is not None:
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service = match.groupdict()
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self.__services.append( (service["name"], int(service["port"]), service["protocol"]) )
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f.close()
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def get_service_name(self, port):
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for service in self.__services:
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if service[1] == port:
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return service[0]
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return str(port)
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def get_service_port(self, name):
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for service in self.__services:
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if service[0] == name:
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return service[1]
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return None
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def set_vm(self, vm):
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self.__vm = vm
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self.clearChildren()
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conf = vm.get_firewall_conf()
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self.allow = conf["allow"]
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self.allowDns = conf["allowDns"]
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for rule in conf["rules"]:
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self.appendChild(QubesFirewallRuleItem(
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rule["address"], rule["netmask"], rule["portBegin"], rule["portEnd"]
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))
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def get_vm_name(self):
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return self.__vm.name
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def apply_rules(self):
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assert self.__vm is not None
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conf = { "allow": self.allow, "allowDns": self.allowDns, "rules": list() }
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for rule in self.children:
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conf["rules"].append(
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{
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"address": rule.address,
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"netmask": rule.netmask,
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"portBegin": rule.portBegin,
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"portEnd": rule.portEnd
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}
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)
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self.__vm.write_firewall_conf(conf)
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qvm_collection = QubesVmCollection()
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qvm_collection.lock_db_for_reading()
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qvm_collection.load()
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qvm_collection.unlock_db()
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for vm in qvm_collection.values():
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if vm.is_fwvm():
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vm.write_iptables_xenstore_entry()
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def index(self, row, column, parent=QModelIndex()):
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if not self.hasIndex(row, column, parent):
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return QModelIndex()
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return self.createIndex(row, column, self.children[row])
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def parent(self, child):
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return QModelIndex()
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def rowCount(self, parent=QModelIndex()):
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return len(self)
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def columnCount(self, parent=QModelIndex()):
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return len(self.__columnValues)
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def hasChildren(self, index=QModelIndex()):
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parentItem = index.internalPointer()
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if parentItem is not None:
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return parentItem.hasChildren()
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else:
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return True
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def data(self, index, role=Qt.DisplayRole):
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if index.isValid() and role == Qt.DisplayRole:
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return self.__columnValues[index.column()](index.row())
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return QVariant()
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def headerData(self, section, orientation, role=Qt.DisplayRole):
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if section < len(self.__columnNames) \
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and orientation == Qt.Horizontal and role == Qt.DisplayRole:
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return self.__columnNames[section]
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return QVariant()
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@property
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def children(self):
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return self.__children
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def appendChild(self, child):
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row = len(self)
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self.beginInsertRows(QModelIndex(), row, row)
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self.children.append(child)
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self.endInsertRows()
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index = self.createIndex(row, 0, child)
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self.dataChanged.emit(index, index)
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def removeChild(self, i):
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if i >= len(self):
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return
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self.beginRemoveRows(QModelIndex(), i, i)
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del self.children[i]
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self.endRemoveRows()
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index = self.createIndex(i, 0)
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self.dataChanged.emit(index, index)
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def setChild(self, i, child):
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self.children[i] = child
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index = self.createIndex(i, 0, child)
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self.dataChanged.emit(index, index)
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def clearChildren(self):
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self.__children = list()
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def __len__(self):
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return len(self.children)
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