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#
# Copyright (c) 2014 ThoughtWorks, Inc.
#
# Pixelated is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Pixelated 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 Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with Pixelated. If not, see <http://www.gnu.org/licenses/>.
import os
import errno
import traceback
from leap.mail.imap.fetch import LeapIncomingMail
from leap.mail.imap.account import SoledadBackedAccount
import sys
from leap.mail.imap.memorystore import MemoryStore
from leap.mail.imap.soledadstore import SoledadStore
from twisted.internet import reactor
from .nicknym import NickNym
from .auth import LeapAuthenticator
from .soledad import SoledadSessionFactory, SoledadSession
from .smtp import LeapSmtp
SESSIONS = {}
class LeapSession(object):
"""
A LEAP session.
Properties:
- ``leap_config`` the configuration for this session (LeapClientConfig).
- ``srp_session`` the secure remote password session to authenticate with LEAP. See http://en.wikipedia.org/wiki/Secure_Remote_Password_protocol (LeapSecureRemotePassword)
- ``soledad_session`` the soledad session. See https://leap.se/soledad (LeapSecureRemotePassword)
- ``nicknym`` the nicknym instance. See https://leap.se/nicknym (NickNym)
- ``account`` the actual leap mail account. Implements Twisted imap4.IAccount and imap4.INamespacePresenter (SoledadBackedAccount)
- ``incoming_mail_fetcher`` Background job for fetching incoming mails from LEAP server (LeapIncomingMail)
"""
def __init__(self, provider, srp_session, soledad_session, nicknym, soledad_account, incoming_mail_fetcher):
"""
Constructor.
:param leap_config: The config for this LEAP session
:type leap_config: LeapConfig
"""
self.config = provider.config
self.provider = provider
self.srp_session = srp_session
self.soledad_session = soledad_session
self.nicknym = nicknym
self.account = soledad_account
self.incoming_mail_fetcher = incoming_mail_fetcher
if self.config.start_background_jobs:
self.start_background_jobs()
def account_email(self):
domain = self.provider.domain
name = self.srp_session.user_name
return '%s@%s' % (name, domain)
def close(self):
self.stop_background_jobs()
def start_background_jobs(self):
reactor.callFromThread(self.incoming_mail_fetcher.start_loop)
def stop_background_jobs(self):
reactor.callFromThread(self.incoming_mail_fetcher.stop)
def sync(self):
try:
self.soledad_session.sync()
except:
traceback.print_exc(file=sys.stderr)
raise
class LeapSessionFactory(object):
def __init__(self, provider):
self._provider = provider
self._config = provider.config
def create(self, credentials):
key = self._session_key(credentials)
session = self._lookup_session(key)
if not session:
session = self._create_new_session(credentials)
self._remember_session(key, session)
return session
def _create_new_session(self, credentials):
self._create_dir(self._provider.config.leap_home)
self._provider.download_certificate_to('%s/ca.crt' % self._provider.config.leap_home)
auth = LeapAuthenticator(self._provider).authenticate(credentials)
soledad = SoledadSessionFactory.create(self._provider, auth, credentials.db_passphrase)
nicknym = self._create_nicknym(auth, soledad)
account = self._create_account(auth, soledad)
incoming_mail_fetcher = self._create_incoming_mail_fetcher(nicknym, soledad,
account, auth)
return LeapSession(self._provider, auth, soledad, nicknym, account, incoming_mail_fetcher)
def _lookup_session(self, key):
global SESSIONS
if key in SESSIONS:
return SESSIONS[key]
else:
return None
def _remember_session(self, key, session):
global SESSIONS
SESSIONS[key] = session
def _session_key(self, credentials):
return hash((self._provider, credentials.user_name))
def _create_dir(self, path):
try:
os.makedirs(path)
except OSError as exc:
if exc.errno == errno.EEXIST and os.path.isdir(path):
pass
else:
raise
def _create_soledad_session(self, srp_session, db_passphrase):
return SoledadSession(self._provider, db_passphrase, srp_session)
def _create_nicknym(self, srp_session, soledad_session):
return NickNym(self._provider, self._config, soledad_session, srp_session)
def _create_account(self, srp_session, soledad_session):
memstore = MemoryStore(permanent_store=SoledadStore(soledad_session.soledad))
return SoledadBackedAccount(srp_session.uuid, soledad_session.soledad, memstore)
def _create_incoming_mail_fetcher(self, nicknym, soledad_session, account, auth):
return LeapIncomingMail(nicknym.keymanager, soledad_session.soledad, account,
self._config.fetch_interval_in_s, self._account_email(auth))
def _account_email(self, auth):
domain = self._provider.domain
name = auth.user_name
return '%s@%s' % (name, domain)
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