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authorIvan Alejandro <ivanalejandro0@gmail.com>2014-09-11 16:59:03 -0300
committerIvan Alejandro <ivanalejandro0@gmail.com>2014-09-11 16:59:03 -0300
commitaacc94aac0f824bb1c292a1cddbbe1a6a0cd4d39 (patch)
tree19f99bf8a5a24eb555680ad767e6da999a0e55f3 /src/leap/bitmask/services/mail/emailfirewall.py
parentbdfac84e20389e2653939fa9f2dd9752eaabcfed (diff)
parent3d0708ad3e20aa8dddf6894b7536be3cd59cfbca (diff)
Merge remote-tracking branch 'meskio/feature/6040_email_firewall' into develop
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diff --git a/src/leap/bitmask/services/mail/emailfirewall.py b/src/leap/bitmask/services/mail/emailfirewall.py
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+# -*- coding: utf-8 -*-
+# emailfirewall.py
+# Copyright (C) 2014 LEAP
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program 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 General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+"""
+Email firewall implementation.
+"""
+
+import os
+import subprocess
+
+from abc import ABCMeta, abstractmethod
+
+from leap.bitmask.config import flags
+from leap.bitmask.platform_init import IS_LINUX
+from leap.bitmask.util import first, force_eval
+from leap.bitmask.util.privilege_policies import LinuxPolicyChecker
+from leap.common.check import leap_assert
+
+
+def get_email_firewall():
+ """
+ Return the email firewall handler for the current platform.
+ """
+ if not (IS_LINUX):
+ error_msg = "Email firewall not implemented for this platform."
+ raise NotImplementedError(error_msg)
+
+ firewall = None
+ if IS_LINUX:
+ firewall = LinuxEmailFirewall
+
+ leap_assert(firewall is not None)
+
+ return firewall()
+
+
+class EmailFirewall(object):
+ """
+ Abstract email firwall class
+ """
+ __metaclass__ = ABCMeta
+
+ @abstractmethod
+ def start(self):
+ """
+ Start email firewall
+ """
+ return False
+
+ @abstractmethod
+ def stop(self):
+ """
+ Stop email firewall
+ """
+ return False
+
+
+class EmailFirewallException(Exception):
+ pass
+
+
+class LinuxEmailFirewall(EmailFirewall):
+
+ class BITMASK_ROOT(object):
+ def __call__(self):
+ return ("/usr/local/sbin/bitmask-root" if flags.STANDALONE else
+ "/usr/sbin/bitmask-root")
+
+ def start(self):
+ uid = str(os.getuid())
+ return True if self._run(["start", uid]) is 0 else False
+
+ def stop(self):
+ return True if self._run(["stop"]) is 0 else False
+
+ def _run(self, cmd):
+ """
+ Run an email firewall command with bitmask-root
+
+ Might raise:
+ NoPkexecAvailable,
+ NoPolkitAuthAgentAvailable,
+
+ :param cmd: command to send to bitmask-root fw-email
+ :type cmd: [str]
+ :returns: exit code of bitmask-root
+ :rtype: int
+ """
+ command = []
+
+ policyChecker = LinuxPolicyChecker()
+ pkexec = policyChecker.maybe_pkexec()
+ if pkexec:
+ command.append(first(pkexec))
+
+ command.append(force_eval(self.BITMASK_ROOT))
+ command.append("fw-email")
+ command += cmd
+
+ # XXX: will be nice to use twisted ProcessProtocol instead of
+ # subprocess to avoid blocking until it finish
+ return subprocess.call(command)