1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
|
# 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/>.
"""PGP enabled BulkDelivery."""
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):
"""Bulk delivery that has a list of callbacks to run for each chunk."""
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()
recipients_copy = set(recipients)
for callback in self.callbacks:
callback(mlist, message_copy, msgdata_copy, recipients_copy)
callback_refused = dict(
(recipient, (444, BaseException))
for recipient in recipients - recipients_copy)
refused.update(callback_refused)
chunk_refused = self._deliver_to_recipients(
mlist, message_copy, msgdata_copy, recipients_copy)
refused.update(chunk_refused)
return refused
class PGPBulkMixin:
"""Bulk encryption and signing Delivery mixin."""
def sign_encrypt(self, mlist, msg, msgdata, recipients):
"""
Sign and encrypt the outgoing message to the 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: set
"""
pgp_list = PGPMailingList.for_list(mlist)
if not pgp_list:
return
if not pgp_list.encrypt_outgoing and not pgp_list.sign_outgoing:
# nothing to do
return
keys = []
for recipient in set(recipients):
pgp_address = PGPAddress.for_email(recipient)
if pgp_address is None:
recipients.remove(recipient)
continue
if pgp_address.key is None or not pgp_address.key_confirmed:
recipients.remove(recipient)
continue
keys.append(pgp_address.key)
wrapped = MIMEWrapper(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:
out = wrapped.encrypt(pgp_list.pubkey, *keys, throw_keyid=True)
overwrite_message(out, msg)
@public
class PGPBulkDelivery(CallbackBulkDelivery, PGPBulkMixin):
"""Bulk PGP enabled delivery."""
def __init__(self, max_recipients=None):
super().__init__(max_recipients=max_recipients)
self.callbacks.append(self.sign_encrypt)
|
