Mercurial > libervia-backend

annotate sat/memory/encryption.py @ 2647:1bf7e89fded0

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
plugin XEP-0060: added singleton ID ("current")
author Goffi <goffi@goffi.org>
date Sun, 29 Jul 2018 19:23:01 +0200
parents 712cb4ff3e13
children ebcff5423465
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
2646
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
1 #!/usr/bin/env python2
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
2 # -*- coding: utf-8 -*-
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
3
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
4 # SAT: a jabber client
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
5 # Copyright (C) 2009-2018 Jérôme Poisson (goffi@goffi.org)
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
6
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
7 # This program is free software: you can redistribute it and/or modify
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
8 # it under the terms of the GNU Affero General Public License as published by
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
9 # the Free Software Foundation, either version 3 of the License, or
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
10 # (at your option) any later version.
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
11
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
12 # This program is distributed in the hope that it will be useful,
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
15 # GNU Affero General Public License for more details.
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
16
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
17 # You should have received a copy of the GNU Affero General Public License
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
18 # along with this program. If not, see <http://www.gnu.org/licenses/>.
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
19
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
20 from sat.core.i18n import _
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
21 from sat.core.constants import Const as C
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
22 from sat.core import exceptions
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
23 from collections import namedtuple
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
24 from sat.core.log import getLogger
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
25 log = getLogger(__name__)
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
26
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
27
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
28 EncryptionPlugin = namedtuple("EncryptionPlugin", ("instance",
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
29 "name",
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
30 "namespace",
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
31 "priority"))
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
32
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
33
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
34 class EncryptionHandler(object):
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
35 """Class to handle encryption sessions for a client"""
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
36 plugins = [] # plugin able to encrypt messages
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
37
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
38 def __init__(self, host):
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
39 self._sessions = {} # bare_jid ==> encryption_data
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
40
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
41 @classmethod
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
42 def registerPlugin(cls, plg_instance, name, namespace, priority=0):
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
43 """Register a plugin handling an encryption algorithm
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
44
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
45 @param plg_instance(object): instance of the plugin
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
46 it must have the following methods:
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
47 - startEncryption(jid.JID): start an encryption session with a bare jid
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
48 - stopEncryption(jid.JID): stop an encryption session with a bare jid
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
49 @param name(unicode): human readable name of the encryption alrgorithm
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
50 @param namespace(unicode): namespace of the encryption algorithm
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
51 @param priority(int): priority of this plugin to encrypt an message when not
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
52 selected manually
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
53 """
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
54 existing_ns = [p.namespace for p in cls.plugins]
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
55 if namespace in existing_ns:
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
56 raise exceptions.ConflictError("A plugin with this namespace already exists!")
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
57 plg = EncryptionPlugin(
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
58 instance=plg_instance,
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
59 name=name,
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
60 namespace=namespace,
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
61 priority=priority)
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
62 cls.plugins.append(plg)
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
63 cls.plugins.sort(key=lambda p: p.priority)
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
64
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
65 def start(self, entity, namespace=None):
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
66 """Start an encrypted session with an entity
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
67
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
68 @param entity(jid.JID): entity to start an encrypted session with
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
69 must be bare jid is the algorithm encrypt for all devices
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
70 @param namespace(unicode, None): namespace of the encryption algorithm to use
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
71 None to select automatically an algorithm
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
72 """
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
73 if not self.plugins:
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
74 raise exceptions.NotFound(_(u"No encryption plugin is registered, "
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
75 u"an encryption session can't be started"))
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
76
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
77 bare_jid = entity.userhostJID()
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
78 if bare_jid in self._sessions:
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
79 plg = self._sessions[bare_jid]['plugin']
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
80
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
81 msg = (_(u"Session with {bare_jid} is already encrypted with {name}."
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
82 u"Please stop encryption session before changing algorithm.")
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
83 .format(bare_jid=bare_jid, name=plg.name))
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
84 log.warning(msg)
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
85 raise exceptions.ConflictError(msg)
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
86
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
87 if namespace is None:
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
88 plg = self.plugins[0]
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
89 else:
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
90 try:
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
91 plg = next(p for p in self.plugins if p.namespace == namespace)
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
92 except StopIteration:
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
93 raise exceptions.NotFound(_(
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
94 u"Can't find requested encryption plugin: {namespace}").format(
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
95 namespace=namespace))
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
96
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
97 data = {"plugin": plg}
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
98 if entity.resource:
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
99 # indicate that we encrypt only for some devices
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
100 data['directed_devices'] = [entity.resource]
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
101
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
102 self._sessions[entity.userhostJID()] = data
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
103 log.info(_(u"Encryption session as been set for {bare_jid} with "
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
104 u"{encryption_name}").format(
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
105 bare_jid=bare_jid.userhost(), encryption_name=plg.name))
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
106
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
107 ## Triggers ##
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
108
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
109 def setEncryptionFlag(self, mess_data):
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
110 """Set "encryption" key in mess_data if session with destinee is encrypted"""
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
111
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
112 if mess_data["type"] == "groupchat":
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
113 # FIXME: to change when group chat encryption will be handled
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
114 return
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
115
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
116 to_jid = mess_data['to']
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
117 encryption = self._sessions.get(to_jid.userhostJID())
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
118 if encryption is not None:
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
119 mess_data[C.MESS_KEY_ENCRYPTION] = encryption