diff options
Diffstat (limited to 'src/pixelated/bitmask_libraries/session.py')
| -rw-r--r-- | src/pixelated/bitmask_libraries/session.py | 320 |
1 files changed, 320 insertions, 0 deletions
diff --git a/src/pixelated/bitmask_libraries/session.py b/src/pixelated/bitmask_libraries/session.py new file mode 100644 index 00000000..a8e1e6f1 --- /dev/null +++ b/src/pixelated/bitmask_libraries/session.py @@ -0,0 +1,320 @@ +# +# 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 +import requests +import logging + +from twisted.internet import reactor, defer +from pixelated.bitmask_libraries.certs import LeapCertificate +from pixelated.adapter.mailstore import LeapMailStore +from leap.mail.incoming.service import IncomingMail +from leap.mail.mail import Account +from leap.auth import SRPAuth +from .nicknym import NickNym +from .smtp import LeapSMTPConfig +from .soledad import SoledadFactory +import leap.common.certs as leap_certs + +from leap.common.events import ( + register, unregister, + catalog as events +) + + +log = logging.getLogger(__name__) + + +class LeapSession(object): + + def __init__(self, provider, user_auth, mail_store, soledad, nicknym, smtp_config): + self.smtp_config = smtp_config + self.config = provider.config + self.provider = provider + self.user_auth = user_auth + self.mail_store = mail_store + self.soledad = soledad + self.nicknym = nicknym + self.fresh_account = False + self.incoming_mail_fetcher = None + self.account = None + self._has_been_initially_synced = False + self._sem_intial_sync = defer.DeferredLock() + self._is_closed = False + register(events.KEYMANAGER_FINISHED_KEY_GENERATION, + self._set_fresh_account, uid=self.account_email()) + + @defer.inlineCallbacks + def initial_sync(self): + yield self._sem_intial_sync.acquire() + try: + yield self.sync() + if not self._has_been_initially_synced: + yield self.after_first_sync() + self._has_been_initially_synced = True + finally: + yield self._sem_intial_sync.release() + defer.returnValue(self) + + @defer.inlineCallbacks + def after_first_sync(self): + yield self.nicknym.generate_openpgp_key() + yield self._create_account(self.soledad) + self.incoming_mail_fetcher = yield self._create_incoming_mail_fetcher( + self.nicknym, + self.soledad, + self.account, + self.account_email()) + reactor.callFromThread(self.incoming_mail_fetcher.startService) + + def _create_account(self, soledad): + self.account = Account(soledad) + return self.account.deferred_initialization + + def _set_fresh_account(self, event, email_address): + log.debug('Key for email %s has been generated' % email_address) + if email_address == self.account_email(): + self.fresh_account = True + + def account_email(self): + name = self.user_auth.username + return self.provider.address_for(name) + + def close(self): + self._is_closed = True + self.stop_background_jobs() + unregister(events.KEYMANAGER_FINISHED_KEY_GENERATION, + uid=self.account_email()) + self.soledad.close() + self.remove_from_cache() + self._close_account() + + @property + def is_closed(self): + return self._is_closed + + def _close_account(self): + if self.account: + self.account.end_session() + + def remove_from_cache(self): + key = SessionCache.session_key(self.provider, self.user_auth.username) + SessionCache.remove_session(key) + + @defer.inlineCallbacks + def _create_incoming_mail_fetcher(self, nicknym, soledad, account, user_mail): + inbox = yield account.callWhenReady(lambda _: account.get_collection_by_mailbox('INBOX')) + defer.returnValue(IncomingMail(nicknym.keymanager, + soledad, + inbox, + user_mail)) + + def stop_background_jobs(self): + if self.incoming_mail_fetcher: + reactor.callFromThread(self.incoming_mail_fetcher.stopService) + self.incoming_mail_fetcher = None + + def sync(self): + try: + return self.soledad.sync() + except: + traceback.print_exc(file=sys.stderr) + raise + + +class SmtpClientCertificate(object): + + def __init__(self, provider, auth, user_path): + self._provider = provider + self._auth = auth + self._user_path = user_path + + def cert_path(self): + if not self._is_cert_already_downloaded() or self._should_redownload(): + self._download_smtp_cert() + + return self._smtp_client_cert_path() + + def _is_cert_already_downloaded(self): + return os.path.exists(self._smtp_client_cert_path()) + + def _should_redownload(self): + return leap_certs.should_redownload(self._smtp_client_cert_path()) + + def _download_smtp_cert(self): + cert_path = self._smtp_client_cert_path() + + if not os.path.exists(os.path.dirname(cert_path)): + os.makedirs(os.path.dirname(cert_path)) + + SmtpCertDownloader(self._provider, self._auth).download_to(cert_path) + + def _smtp_client_cert_path(self): + return os.path.join( + self._user_path, + "providers", + self._provider.domain, + "keys", "client", "smtp.pem") + + +class SmtpCertDownloader(object): + + def __init__(self, provider, auth): + self._provider = provider + self._auth = auth + + def download(self): + cert_url = '%s/%s/smtp_cert' % (self._provider.api_uri, + self._provider.api_version) + cookies = {"_session_id": self._auth.session_id} + headers = {} + headers["Authorization"] = 'Token token="{0}"'.format(self._auth.token) + params = {'address': self._auth.username} + response = requests.post( + cert_url, + params=params, + data=params, + verify=LeapCertificate(self._provider).provider_api_cert, + cookies=cookies, + timeout=self._provider.config.timeout_in_s, + headers=headers) + response.raise_for_status() + + client_cert = response.content + + return client_cert + + def download_to(self, target_file): + client_cert = self.download() + + with open(target_file, 'w') as f: + f.write(client_cert) + + +class LeapSessionFactory(object): + + def __init__(self, provider): + self._provider = provider + self._config = provider.config + + def create(self, username, password, auth=None): + key = SessionCache.session_key(self._provider, username) + session = SessionCache.lookup_session(key) + if not session: + session = self._create_new_session(username, password, auth) + SessionCache.remember_session(key, session) + + return session + + def _auth_leap(self, username, password): + srp_auth = SRPAuth(self._provider.api_uri, self._provider.local_ca_crt) + return srp_auth.authenticate(username, password) + + def _create_new_session(self, username, password, auth=None): + self._create_dir(self._provider.config.leap_home) + self._provider.download_certificate() + + auth = auth or self._auth_leap(username, password) + account_email = self._provider.address_for(username) + + self._create_database_dir(auth.uuid) + + soledad = SoledadFactory.create(auth.token, + auth.uuid, + password, + self._secrets_path(auth.uuid), + self._local_db_path(auth.uuid), + self._provider.discover_soledad_server( + auth.uuid), + LeapCertificate(self._provider).provider_api_cert) + + mail_store = LeapMailStore(soledad) + nicknym = self._create_nicknym( + account_email, auth.token, auth.uuid, soledad) + + smtp_client_cert = self._download_smtp_cert(auth) + smtp_host, smtp_port = self._provider.smtp_info() + smtp_config = LeapSMTPConfig( + account_email, smtp_client_cert, smtp_host, smtp_port) + + return LeapSession(self._provider, auth, mail_store, soledad, nicknym, smtp_config) + + def _download_smtp_cert(self, auth): + cert = SmtpClientCertificate( + self._provider, auth, self._user_path(auth.uuid)) + return cert.cert_path() + + 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, email_address, token, uuid, soledad): + return NickNym(self._provider, self._config, soledad, email_address, token, uuid) + + def _user_path(self, user_uuid): + return os.path.join(self._config.leap_home, user_uuid) + + def _soledad_path(self, user_uuid): + return os.path.join(self._config.leap_home, user_uuid, 'soledad') + + def _secrets_path(self, user_uuid): + return os.path.join(self._soledad_path(user_uuid), 'secrets') + + def _local_db_path(self, user_uuid): + return os.path.join(self._soledad_path(user_uuid), 'soledad.db') + + def _create_database_dir(self, user_uuid): + try: + os.makedirs(self._soledad_path(user_uuid)) + except OSError as exc: + if exc.errno == errno.EEXIST and os.path.isdir(self._soledad_path(user_uuid)): + pass + else: + raise + + +class SessionCache(object): + + sessions = {} + + @staticmethod + def lookup_session(key): + session = SessionCache.sessions.get(key, None) + if session is not None and session.is_closed: + SessionCache.remove_session(key) + return None + else: + return session + + @staticmethod + def remember_session(key, session): + SessionCache.sessions[key] = session + + @staticmethod + def remove_session(key): + if key in SessionCache.sessions: + del SessionCache.sessions[key] + + @staticmethod + def session_key(provider, username): + return hash((provider, username)) |