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
|
# -*- coding: utf-8 -*-
# smtpbootstrapper.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/>.
"""
SMTP bootstrapping
"""
import os
import warnings
from collections import namedtuple
from requests.exceptions import HTTPError
from leap.bitmask.config.providerconfig import ProviderConfig
from leap.bitmask.crypto.certs import download_client_cert
from leap.bitmask.logs.utils import get_logger
from leap.bitmask.services import download_service_config
from leap.bitmask.services.abstractbootstrapper import AbstractBootstrapper
from leap.bitmask.services.mail.smtpconfig import SMTPConfig
from leap.common import certs as leap_certs
from leap.common.check import leap_assert
from leap.common.files import check_and_fix_urw_only
logger = get_logger()
class NoSMTPHosts(Exception):
"""This is raised when there is no SMTP host to use."""
class MalformedUserId(Exception):
"""This is raised when an userid does not have the form user@provider."""
class SMTPBootstrapper(AbstractBootstrapper):
"""
SMTP init procedure
"""
PORT_KEY = "port"
IP_KEY = "ip_address"
def __init__(self):
AbstractBootstrapper.__init__(self)
self._provider_config = None
self._smtp_config = None
self._userid = None
self._download_if_needed = False
self._smtp_service = None
self._smtp_port = None
def _download_config_and_cert(self):
"""
Downloads the SMTP config and cert for the given provider.
"""
leap_assert(self._provider_config,
"We need a provider configuration!")
logger.debug("Downloading SMTP config for %s" %
(self._provider_config.get_domain(),))
download_service_config(
self._provider_config,
self._smtp_config,
self._session,
self._download_if_needed)
hosts = self._smtp_config.get_hosts()
if len(hosts) == 0:
raise NoSMTPHosts()
# TODO handle more than one host and define how to choose
hostname = hosts.keys()[0]
logger.debug("Using hostname %s for SMTP" % (hostname,))
client_cert_path = self._smtp_config.get_client_cert_path(
self._userid, self._provider_config, about_to_download=True)
needs_download = leap_certs.should_redownload(client_cert_path)
if needs_download:
# For re-download if something is wrong with the cert
# FIXME this doesn't read well. should reword the logic here.
self._download_if_needed = (
self._download_if_needed and not needs_download)
if self._download_if_needed and os.path.isfile(client_cert_path):
check_and_fix_urw_only(client_cert_path)
return
try:
download_client_cert(self._provider_config,
client_cert_path,
self._session, kind="smtp")
except HTTPError as exc:
if exc.message.startswith('403 Client Error'):
logger.debug(
'Auth problem downloading smtp certificate... '
'It might be a provider problem, will try '
'fetching from vpn pool')
warnings.warn(
'Compatibility hack for platform 0.7 not fully '
'supporting smtp certificates. Will be deprecated in '
'bitmask 0.10')
download_client_cert(self._provider_config,
client_cert_path,
self._session, kind="vpn")
else:
raise
def _start_smtp_service(self):
"""
Start the smtp service using the downloaded configurations.
"""
# TODO Make the encrypted_only configurable
# TODO handle more than one host and define how to choose
hosts = self._smtp_config.get_hosts()
hostname = hosts.keys()[0]
host = hosts[hostname][self.IP_KEY].encode("utf-8")
port = hosts[hostname][self.PORT_KEY]
client_cert_path = self._smtp_config.get_client_cert_path(
self._userid, self._provider_config, about_to_download=True)
# XXX this should be defined in leap.mail.smtp, it's in bitmask.core
# right now.
SendmailOpts = namedtuple(
'SendmailOpts', ['cert', 'key', 'hostname', 'port'])
userid = self._userid
soledad_sessions = {userid: self._soledad}
keymanager_sessions = {userid: self._keymanager}
key = cert = client_cert_path
opts = SendmailOpts(cert, key, host, port)
sendmail_opts = {userid: opts}
from leap.mail.smtp import run_service
self._smtp_service, self._smtp_port = run_service(
soledad_sessions, keymanager_sessions, sendmail_opts)
def start_smtp_service(self, soledad, keymanager, userid,
download_if_needed=False):
"""
Starts the SMTP service.
:param keymanager: a transparent proxy that eventually will point to a
Keymanager Instance.
:type keymanager: zope.proxy.ProxyBase
:param userid: the user id, in the form "user@provider"
:type userid: str
:param download_if_needed: True if it should check for mtime
for the file
:type download_if_needed: bool
"""
try:
username, domain = userid.split('@')
except ValueError:
logger.critical("Malformed userid parameter!")
raise MalformedUserId()
self._provider_config = ProviderConfig.get_provider_config(domain)
self._soledad = soledad
self._keymanager = keymanager
self._smtp_config = SMTPConfig()
self._userid = str(userid)
self._download_if_needed = download_if_needed
try:
self._download_config_and_cert()
logger.debug("Starting SMTP service.")
self._start_smtp_service()
except NoSMTPHosts:
logger.warning("There is no SMTP host to use.")
except Exception as e:
# TODO: we should handle more specific exceptions in here
logger.exception("Error while bootstrapping SMTP: %r" % (e, ))
def stop_smtp_service(self):
"""
Stops the smtp service (port and factory).
"""
if self._smtp_service is not None:
logger.debug('Stopping SMTP service.')
self._smtp_port.stopListening()
self._smtp_service.doStop()
else:
logger.debug('SMTP service not running.')
|
