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# -*- coding: utf-8 -*-
# imap.py
# Copyright (C) 2013 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/>.
"""
Imap service initialization
"""
from copy import copy
import logging
from twisted.internet.protocol import ServerFactory
from twisted.internet.error import CannotListenError
from twisted.mail import imap4
from twisted.python import log
logger = logging.getLogger(__name__)
from leap.common import events as leap_events
from leap.common.check import leap_assert, leap_assert_type
from leap.keymanager import KeyManager
from leap.mail.imap.server import SoledadBackedAccount
from leap.mail.imap.fetch import LeapIncomingMail
from leap.soledad.client import Soledad
# The default port in which imap service will run
IMAP_PORT = 1984
# The period between succesive checks of the incoming mail
# queue (in seconds)
INCOMING_CHECK_PERIOD = 300
from leap.common.events.events_pb2 import IMAP_SERVICE_STARTED
from leap.common.events.events_pb2 import IMAP_SERVICE_FAILED_TO_START
from leap.common.events.events_pb2 import IMAP_CLIENT_LOGIN
class LeapIMAPServer(imap4.IMAP4Server):
"""
An IMAP4 Server with mailboxes backed by soledad
"""
def __init__(self, *args, **kwargs):
# pop extraneous arguments
soledad = kwargs.pop('soledad', None)
user = kwargs.pop('user', None)
leap_assert(soledad, "need a soledad instance")
leap_assert_type(soledad, Soledad)
leap_assert(user, "need a user in the initialization")
# initialize imap server!
imap4.IMAP4Server.__init__(self, *args, **kwargs)
# we should initialize the account here,
# but we move it to the factory so we can
# populate the test account properly (and only once
# per session)
# theAccount = SoledadBackedAccount(
# user, soledad=soledad)
# ---------------------------------
# XXX pre-populate acct for tests!!
# populate_test_account(theAccount)
# ---------------------------------
#self.theAccount = theAccount
def lineReceived(self, line):
if "login" in line:
# avoid to log the pass, even though we are using a dummy auth
# by now.
msg = line[:7] + " [...]"
else:
msg = copy(line)
log.msg('rcv: %s' % msg)
imap4.IMAP4Server.lineReceived(self, line)
def authenticateLogin(self, username, password):
# all is allowed so far. use realm instead
leap_events.signal(IMAP_CLIENT_LOGIN, "1")
return imap4.IAccount, self.theAccount, lambda: None
class IMAPAuthRealm(object):
"""
Dummy authentication realm. Do not use in production!
"""
theAccount = None
def requestAvatar(self, avatarId, mind, *interfaces):
return imap4.IAccount, self.theAccount, lambda: None
class LeapIMAPFactory(ServerFactory):
"""
Factory for a IMAP4 server with soledad remote sync and gpg-decryption
capabilities.
"""
def __init__(self, user, soledad):
"""
Initializes the server factory.
:param user: user ID. **right now it's uuid**
this might change!
:type user: str
:param soledad: soledad instance
:type soledad: Soledad
"""
self._user = user
self._soledad = soledad
theAccount = SoledadBackedAccount(
user, soledad=soledad)
self.theAccount = theAccount
def buildProtocol(self, addr):
"Return a protocol suitable for the job."
imapProtocol = LeapIMAPServer(
user=self._user,
soledad=self._soledad)
imapProtocol.theAccount = self.theAccount
imapProtocol.factory = self
return imapProtocol
def run_service(*args, **kwargs):
"""
Main entry point to run the service from the client.
:returns: the LoopingCall instance that will have to be stoppped
before shutting down the client.
"""
leap_assert(len(args) == 2)
soledad, keymanager = args
leap_assert_type(soledad, Soledad)
leap_assert_type(keymanager, KeyManager)
port = kwargs.get('port', IMAP_PORT)
check_period = kwargs.get('check_period', INCOMING_CHECK_PERIOD)
uuid = soledad._get_uuid()
factory = LeapIMAPFactory(uuid, soledad)
from twisted.internet import reactor
try:
reactor.listenTCP(port, factory,
interface="localhost")
fetcher = LeapIncomingMail(
keymanager,
soledad,
factory.theAccount,
check_period)
except CannotListenError:
logger.error("IMAP Service failed to start: "
"cannot listen in port %s" % (port,))
except Exception as exc:
logger.error("Error launching IMAP service: %r" % (exc,))
else:
# all good.
fetcher.start_loop()
logger.debug("IMAP4 Server is RUNNING in port %s" % (port,))
leap_events.signal(IMAP_SERVICE_STARTED, str(port))
return fetcher
# not ok, signal error.
leap_events.signal(IMAP_SERVICE_FAILED_TO_START, str(port))
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