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
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
|
#!/usr/bin/env python
# -*- encoding: utf-8 -*-
# mail_receiver.py
# Copyright (C) 2013 LEAP
#
# 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 os
import uuid as pyuuid
import logging
import argparse
import ConfigParser
import json
from email import message_from_string
from functools import partial
from twisted.internet import inotify, reactor
from twisted.python import filepath
from leap.mx import couchdbhelper
from leap.soledad import LeapDocument
from leap.soledad.backends.leap_backend import EncryptionSchemes
from leap.soledad.backends.couch import CouchDatabase
from leap.common.keymanager import openpgp
logger = logging.getLogger(__name__)
def _get_pubkey(uuid, cdb):
logger.debug("Fetching pubkey for %s" % (uuid,))
return uuid, cdb.getPubKey(uuid)
def _encrypt_message(uuid_pubkey, address_message):
uuid, pubkey = uuid_pubkey
address, message = address_message
logger.debug("Encrypting message to %s's pubkey" % (uuid,))
logger.debug("Pubkey: %s" % (pubkey,))
doc = LeapDocument(encryption_scheme=EncryptionSchemes.PUBKEY,
doc_id=str(pyuuid.uuid4()))
data = {'incoming': True, 'content': message}
if pubkey is None or len(pubkey) == 0:
doc.content = {
"_unencrypted_json": json.dumps(data)
}
return uuid, doc
def _ascii_to_openpgp_cb(gpg):
key = gpg.list_keys().pop()
return openpgp._build_key_from_gpg(address, key, pubkey)
openpgp_key = openpgp._safe_call(_ascii_to_openpgp_cb, pubkey)
doc.content = {
"_encrypted_json": openpgp.encrypt_asym(json.dumps(data), openpgp_key)
}
return uuid, doc
def _export_message(uuid_doc, couch_url):
uuid, doc = uuid_doc
logger.debug("Exporting message for %s" % (uuid,))
if uuid is None:
uuid = 0
db = CouchDatabase(couch_url, "user-%s" % (uuid,))
db.put_doc(doc)
logger.debug("Done exporting")
return True
def _conditional_remove(do_remove, filepath):
if do_remove:
# remove the original mail
try:
logger.debug("Removing %s" % (filepath.path,))
filepath.remove()
logger.debug("Done removing")
except Exception as e:
# TODO: better handle exceptions
logger.exception("%s" % (e,))
def _process_incoming_email(users_db, mail_couchdb_url_prefix, self, filepath, mask):
if os.path.split(filepath.dirname())[-1] == "new":
logger.debug("Processing new mail at %s" % (filepath.path,))
with filepath.open("r") as f:
mail_data = f.read()
mail = message_from_string(mail_data)
owner = mail["To"]
if owner is None: # default to Delivered-To
owner = mail["Delivered-To"]
owner = owner.split("@")[0]
owner = owner.split("+")[0]
logger.debug("Mail owner: %s" % (owner,))
logger.debug("%s received a new mail" % (owner,))
d = users_db.queryByLoginOrAlias(owner)
d.addCallback(_get_pubkey, (users_db))
d.addCallback(_encrypt_message, (owner, mail_data))
d.addCallback(_export_message, (mail_couchdb_url_prefix))
d.addCallback(_conditional_remove, (filepath))
def main():
epilog = "Copyright 2012 The LEAP Encryption Access Project"
parser = argparse.ArgumentParser(description="""LEAP MX Mail receiver""", epilog=epilog)
parser.add_argument('-d', '--debug', action="store_true",
help="Launches the LEAP MX mail receiver with debug output")
parser.add_argument('-l', '--logfile', metavar="LOG FILE", nargs='?',
action="store", dest="log_file",
help="Writes the logs to the specified file")
parser.add_argument('-c', '--config', metavar="CONFIG FILE", nargs='?',
action="store", dest="config",
help="Where to look for the configuration file. " \
"Default: mail_receiver.cfg")
opts, _ = parser.parse_known_args()
debug = opts.debug
config_file = opts.config
if debug:
level = logging.DEBUG
else:
level = logging.WARNING
if config_file is None:
config_file = "leap_mx.cfg"
logger.setLevel(level)
console = logging.StreamHandler()
console.setLevel(level)
formatter = logging.Formatter(
'%(asctime)s '
'- %(name)s - %(levelname)s - %(message)s')
console.setFormatter(formatter)
logger.addHandler(console)
logger.info("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~")
logger.info(" LEAP MX Mail receiver")
logger.info("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~")
logger.info("Reading configuration from %s" % (config_file,))
config = ConfigParser.ConfigParser()
config.read(config_file)
users_user = config.get("couchdb", "users_user")
users_password = config.get("couchdb", "users_password")
mail_user = config.get("couchdb", "mail_user")
mail_password = config.get("couchdb", "mail_password")
server = config.get("couchdb", "server")
port = config.get("couchdb", "port")
wm = inotify.INotify(reactor)
wm.startReading()
mask = inotify.IN_CREATE
users_db = couchdbhelper.ConnectedCouchDB(server,
port=port,
dbName="users",
username=users_user,
password=users_password)
mail_couch_url_prefix = "http://%s:%s@localhost:%s" % (mail_user,
mail_password,
port)
incoming_partial = partial(_process_incoming_email, users_db, mail_couch_url_prefix)
for section in config.sections():
if section in ("couchdb"):
continue
to_watch = config.get(section, "path")
recursive = config.getboolean(section, "recursive")
logger.debug("Watching %s --- Recursive: %s" % (to_watch, recursive))
wm.watch(filepath.FilePath(to_watch), mask, callbacks=[incoming_partial], recursive=recursive)
reactor.run()
if __name__ == "__main__":
main()
|
