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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 errno
import traceback
import sys
import os
from leap.mail.imap.fetch import LeapIncomingMail
from leap.mail.imap.account import SoledadBackedAccount
from leap.mail.imap.memorystore import MemoryStore
from leap.mail.imap.soledadstore import SoledadStore
from pixelated.bitmask_libraries.config import LeapConfig
from pixelated.bitmask_libraries.provider import LeapProvider
from pixelated.bitmask_libraries.certs import refresh_ca_bundle
from twisted.internet import reactor
from .nicknym import NickNym
from leap.auth import SRPAuth
from .soledad import SoledadSessionFactory, SoledadSession
from .smtp import LeapSmtp
from .config import DEFAULT_LEAP_HOME
SESSIONS = {}
def open(username, password, server_name, leap_home=DEFAULT_LEAP_HOME):
config = LeapConfig(leap_home=leap_home)
provider = LeapProvider(server_name, config)
refresh_ca_bundle(provider)
session = LeapSessionFactory(provider).create(username, password)
return session
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, user_auth, soledad_session, nicknym, soledad_account, incoming_mail_fetcher, smtp):
"""
Constructor.
:param leap_config: The config for this LEAP session
:type leap_config: LeapConfig
"""
self.smtp = smtp
self.config = provider.config
self.provider = provider
self.user_auth = user_auth
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.user_auth.username
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, username, password):
key = self._session_key(username)
session = self._lookup_session(key)
if not session:
session = self._create_new_session(username, password)
self._remember_session(key, session)
return session
def _create_new_session(self, username, password):
self._create_dir(self._provider.config.leap_home)
self._provider.download_certificate()
srp_auth = SRPAuth(self._provider.api_uri, self._provider.local_ca_crt)
auth = srp_auth.authenticate(username, password)
soledad = SoledadSessionFactory.create(self._provider, auth.token, auth.uuid, password)
nicknym = self._create_nicknym(auth.username, auth.token, auth.uuid, soledad)
account = self._create_account(auth.uuid, soledad)
incoming_mail_fetcher = self._create_incoming_mail_fetcher(nicknym, soledad, account, auth.username)
smtp = LeapSmtp(self._provider, auth.username, auth.session_id, nicknym.keymanager)
smtp.ensure_running()
return LeapSession(self._provider, auth, soledad, nicknym, account, incoming_mail_fetcher, smtp)
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, username):
return hash((self._provider, username))
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_nicknym(self, username, token, uuid, soledad_session):
return NickNym(self._provider, self._config, soledad_session, username, token, uuid)
def _create_account(self, uuid, soledad_session):
memstore = MemoryStore(permanent_store=SoledadStore(soledad_session.soledad))
return SoledadBackedAccount(uuid, soledad_session.soledad, memstore)
def _create_incoming_mail_fetcher(self, nicknym, soledad_session, account, username):
return LeapIncomingMail(nicknym.keymanager, soledad_session.soledad, account,
self._config.fetch_interval_in_s, self._account_email(username))
def _account_email(self, username):
domain = self._provider.domain
return '%s@%s' % (username, domain)
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