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# Copyright (C) 2017 Jan Jancar
#
# This file is a part of the Mailman PGP plugin.
#
# 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/>.
""""""
import copy
from mailman.mta.bulk import BulkDelivery
from public import public
from mailman_pgp.model.address import PGPAddress
from mailman_pgp.model.list import PGPMailingList
from mailman_pgp.pgp.mime import MIMEWrapper
from mailman_pgp.utils.email import overwrite_message
class CallbackBulkDelivery(BulkDelivery):
""""""
def __init__(self, max_recipients=None):
super().__init__(max_recipients=max_recipients)
self.callbacks = []
def deliver(self, mlist, msg, msgdata):
"""See `IMailTransportAgentDelivery`."""
refused = {}
for recipients in self.chunkify(msgdata.get('recipients', set())):
message_copy = copy.deepcopy(msg)
msgdata_copy = msgdata.copy()
for callback in self.callbacks:
callback(mlist, message_copy, msgdata_copy, recipients)
chunk_refused = self._deliver_to_recipients(
mlist, message_copy, msgdata_copy, recipients)
refused.update(chunk_refused)
return refused
class PGPBulkMixin:
""""""
def sign_encrypt(self, mlist, msg, msgdata, recipients):
"""
:param mlist:
:type mlist: mailman.model.mailinglist.MailingList
:param msg:
:type msg: mailman.email.message.Message
:param msgdata:
:type msgdata: dict
:param recipients:
:type recipients: list
"""
pgp_list = PGPMailingList.for_list(mlist)
if not pgp_list:
return
keys = []
for recipient in recipients:
pgp_address = PGPAddress.for_email(recipient)
if pgp_address is None:
# TODO: log failure here
continue
if pgp_address.key is None or not pgp_address.key_confirmed:
# TODO: log failure here?
continue
keys.append(pgp_address.key)
wrapped = MIMEWrapper(msg)
out = msg
if pgp_list.sign_outgoing:
if pgp_list.encrypt_outgoing:
out = wrapped.sign_encrypt(pgp_list.key, pgp_list.pubkey,
*keys, throw_keyid=True)
else:
out = wrapped.sign(pgp_list.key)
else:
if pgp_list.encrypt_outgoing:
out = wrapped.encrypt(pgp_list.pubkey, *keys, throw_keyid=True)
if out is not msg:
overwrite_message(out, msg)
@public
class PGPBulkDelivery(CallbackBulkDelivery, PGPBulkMixin):
""""""
def __init__(self, max_recipients=None):
super().__init__(max_recipients=max_recipients)
self.callbacks.append(self.sign_encrypt)
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