annotate sat/memory/encryption.py @ 2771:003b8b4b56a7

date update
author Goffi <goffi@goffi.org>
date Sat, 12 Jan 2019 12:25:31 +0100
parents 1fa615faec8b
children c161a294fffd
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1 #!/usr/bin/env python2
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2 # -*- coding: utf-8 -*-
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3
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4 # SAT: a jabber client
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5 # Copyright (C) 2009-2019 Jérôme Poisson (goffi@goffi.org)
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6
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7 # This program is free software: you can redistribute it and/or modify
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8 # it under the terms of the GNU Affero General Public License as published by
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9 # the Free Software Foundation, either version 3 of the License, or
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10 # (at your option) any later version.
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11
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12 # This program is distributed in the hope that it will be useful,
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13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 # GNU Affero General Public License for more details.
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16
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17 # You should have received a copy of the GNU Affero General Public License
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18 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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19
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20 from sat.core.i18n import D_, _
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21 from sat.core.constants import Const as C
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22 from sat.core import exceptions
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23 from collections import namedtuple
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24 from sat.core.log import getLogger
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25 from sat.tools.common import data_format
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26 from twisted.internet import defer
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27 from twisted.python import failure
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28 import copy
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29 log = getLogger(__name__)
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30
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31 log = getLogger(__name__)
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32
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33 EncryptionPlugin = namedtuple("EncryptionPlugin", ("instance",
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34 "name",
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35 "namespace",
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36 "priority",
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37 "directed"))
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38
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39
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40 class EncryptionHandler(object):
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41 """Class to handle encryption sessions for a client"""
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42 plugins = [] # plugin able to encrypt messages
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43
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44 def __init__(self, client):
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45 self.client = client
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46 self._sessions = {} # bare_jid ==> encryption_data
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47
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48 @property
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49 def host(self):
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50 return self.client.host_app
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51
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52 @classmethod
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53 def registerPlugin(cls, plg_instance, name, namespace, priority=0, directed=False):
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54 """Register a plugin handling an encryption algorithm
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55
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56 @param plg_instance(object): instance of the plugin
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57 it must have the following methods:
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58 - getTrustUI(entity): return a XMLUI for trust management
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59 entity(jid.JID): entity to manage
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60 The returned XMLUI must be a form
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61 if may have the following methods:
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62 - startEncryption(entity): start encrypted session
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63 entity(jid.JID): entity to start encrypted session with
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64 - stopEncryption(entity): start encrypted session
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65 entity(jid.JID): entity to stop encrypted session with
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66 if they don't exists, those 2 methods will be ignored.
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67
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68 @param name(unicode): human readable name of the encryption algorithm
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69 @param namespace(unicode): namespace of the encryption algorithm
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70 @param priority(int): priority of this plugin to encrypt an message when not
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71 selected manually
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72 @param directed(bool): True if this plugin is directed (if it works with one
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73 device only at a time)
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74 """
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75 existing_ns = set()
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76 existing_names = set()
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77 for p in cls.plugins:
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78 existing_ns.add(p.namespace.lower())
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79 existing_names.add(p.name.lower())
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80 if namespace.lower() in existing_ns:
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81 raise exceptions.ConflictError("A plugin with this namespace already exists!")
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82 if name.lower() in existing_names:
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83 raise exceptions.ConflictError("A plugin with this name already exists!")
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84 plugin = EncryptionPlugin(
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85 instance=plg_instance,
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86 name=name,
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87 namespace=namespace,
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88 priority=priority,
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89 directed=directed)
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90 cls.plugins.append(plugin)
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91 cls.plugins.sort(key=lambda p: p.priority)
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92 log.info(_(u"Encryption plugin registered: {name}").format(name=name))
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93
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94 @classmethod
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95 def getPlugins(cls):
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96 return cls.plugins
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97
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98 @classmethod
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99 def getPlugin(cls, namespace):
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100 try:
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101 return next(p for p in cls.plugins if p.namespace == namespace)
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102 except StopIteration:
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103 raise exceptions.NotFound(_(
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104 u"Can't find requested encryption plugin: {namespace}").format(
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105 namespace=namespace))
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106
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107 @classmethod
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108 def getNamespaces(cls):
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109 """Get available plugin namespaces"""
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110 return {p.namespace for p in cls.getPlugins()}
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111
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112 @classmethod
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113 def getNSFromName(cls, name):
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114 """Retrieve plugin namespace from its name
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115
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116 @param name(unicode): name of the plugin (case insensitive)
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117 @return (unicode): namespace of the plugin
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118 @raise exceptions.NotFound: there is not encryption plugin of this name
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119 """
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120 for p in cls.plugins:
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121 if p.name.lower() == name.lower():
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122 return p.namespace
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123 raise exceptions.NotFound(_(
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124 u"Can't find a plugin with the name \"{name}\".".format(
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125 name=name)))
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126
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127 def getBridgeData(self, session):
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128 """Retrieve session data serialized for bridge.
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parents: 2651
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129
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130 @param session(dict): encryption session
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diff changeset
131 @return (unicode): serialized data for bridge
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parents: 2651
diff changeset
132 """
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parents: 2651
diff changeset
133 if session is None:
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parents: 2651
diff changeset
134 return u''
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Goffi <goffi@goffi.org>
parents: 2651
diff changeset
135 plugin = session[u'plugin']
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Goffi <goffi@goffi.org>
parents: 2651
diff changeset
136 bridge_data = {'name': plugin.name,
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
137 'namespace': plugin.namespace}
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Goffi <goffi@goffi.org>
parents: 2651
diff changeset
138 if u'directed_devices' in session:
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Goffi <goffi@goffi.org>
parents: 2651
diff changeset
139 bridge_data[u'directed_devices'] = session[u'directed_devices']
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parents: 2651
diff changeset
140
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parents: 2651
diff changeset
141 return data_format.serialise(bridge_data)
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diff changeset
142
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143 def _startEncryption(self, plugin, entity):
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144 """Start encryption with a plugin
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parents: 2733
diff changeset
145
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diff changeset
146 This method must be called just before adding a plugin session.
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diff changeset
147 StartEncryptionn method of plugin will be called if it exists.
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148 """
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diff changeset
149 try:
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diff changeset
150 start_encryption = plugin.instance.startEncryption
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diff changeset
151 except AttributeError:
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parents: 2733
diff changeset
152 log.debug(u"No startEncryption method found for {plugin}".format(
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parents: 2733
diff changeset
153 plugin = plugin.namespace))
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parents: 2733
diff changeset
154 return defer.succeed(None)
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Goffi <goffi@goffi.org>
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155 else:
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156 # we copy entity to avoid having the resource changed by stop_encryption
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parents: 2733
diff changeset
157 return defer.maybeDeferred(start_encryption, self.client, copy.copy(entity))
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diff changeset
158
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Goffi <goffi@goffi.org>
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diff changeset
159 def _stopEncryption(self, plugin, entity):
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Goffi <goffi@goffi.org>
parents: 2733
diff changeset
160 """Stop encryption with a plugin
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Goffi <goffi@goffi.org>
parents: 2733
diff changeset
161
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Goffi <goffi@goffi.org>
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diff changeset
162 This method must be called just before removing a plugin session.
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Goffi <goffi@goffi.org>
parents: 2733
diff changeset
163 StopEncryptionn method of plugin will be called if it exists.
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Goffi <goffi@goffi.org>
parents: 2733
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164 """
da59ff099b32 core (memory/encryption), plugin OTR: finished OTR integration in encryption:
Goffi <goffi@goffi.org>
parents: 2733
diff changeset
165 try:
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Goffi <goffi@goffi.org>
parents: 2733
diff changeset
166 stop_encryption = plugin.instance.stopEncryption
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Goffi <goffi@goffi.org>
parents: 2733
diff changeset
167 except AttributeError:
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Goffi <goffi@goffi.org>
parents: 2733
diff changeset
168 log.debug(u"No stopEncryption method found for {plugin}".format(
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Goffi <goffi@goffi.org>
parents: 2733
diff changeset
169 plugin = plugin.namespace))
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Goffi <goffi@goffi.org>
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diff changeset
170 return defer.succeed(None)
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Goffi <goffi@goffi.org>
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diff changeset
171 else:
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Goffi <goffi@goffi.org>
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diff changeset
172 # we copy entity to avoid having the resource changed by stop_encryption
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parents: 2733
diff changeset
173 return defer.maybeDeferred(stop_encryption, self.client, copy.copy(entity))
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Goffi <goffi@goffi.org>
parents: 2733
diff changeset
174
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Goffi <goffi@goffi.org>
parents: 2733
diff changeset
175 @defer.inlineCallbacks
2658
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Goffi <goffi@goffi.org>
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diff changeset
176 def start(self, entity, namespace=None, replace=False):
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diff changeset
177 """Start an encryption session with an entity
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Goffi <goffi@goffi.org>
parents: 2651
diff changeset
178
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Goffi <goffi@goffi.org>
parents: 2651
diff changeset
179 @param entity(jid.JID): entity to start an encryption session with
2646
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parents:
diff changeset
180 must be bare jid is the algorithm encrypt for all devices
2733
e347e32aa07f core (memory/encryption): new encryptionNamespaceGet and encryptionTrustUIGet methods:
Goffi <goffi@goffi.org>
parents: 2658
diff changeset
181 @param namespace(unicode, None): namespace of the encryption algorithm
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Goffi <goffi@goffi.org>
parents: 2658
diff changeset
182 to use.
2646
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
183 None to select automatically an algorithm
2658
4e130cc9bfc0 core (memore/encryption): new methods and checks:
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diff changeset
184 @param replace(bool): if True and an encrypted session already exists,
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parents: 2651
diff changeset
185 it will be replaced by the new one
2646
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
186 """
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
187 if not self.plugins:
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
188 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
189 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
190
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
191 if namespace is None:
2658
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
192 plugin = self.plugins[0]
2646
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
193 else:
2733
e347e32aa07f core (memory/encryption): new encryptionNamespaceGet and encryptionTrustUIGet methods:
Goffi <goffi@goffi.org>
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diff changeset
194 plugin = self.getPlugin(namespace)
2646
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
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parents:
diff changeset
195
2651
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Goffi <goffi@goffi.org>
parents: 2646
diff changeset
196 bare_jid = entity.userhostJID()
ebcff5423465 core (memory/encryption): start improvments, stop and getSession:
Goffi <goffi@goffi.org>
parents: 2646
diff changeset
197 if bare_jid in self._sessions:
2658
4e130cc9bfc0 core (memore/encryption): new methods and checks:
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diff changeset
198 # we have already an encryption session with this contact
2743
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parents: 2733
diff changeset
199 former_plugin = self._sessions[bare_jid][u"plugin"]
2658
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
200 if former_plugin.namespace == namespace:
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
201 log.info(_(u"Session with {bare_jid} is already encrypted with {name}. "
2733
e347e32aa07f core (memory/encryption): new encryptionNamespaceGet and encryptionTrustUIGet methods:
Goffi <goffi@goffi.org>
parents: 2658
diff changeset
202 u"Nothing to do.").format(
e347e32aa07f core (memory/encryption): new encryptionNamespaceGet and encryptionTrustUIGet methods:
Goffi <goffi@goffi.org>
parents: 2658
diff changeset
203 bare_jid=bare_jid, name=former_plugin.name))
2651
ebcff5423465 core (memory/encryption): start improvments, stop and getSession:
Goffi <goffi@goffi.org>
parents: 2646
diff changeset
204 return
ebcff5423465 core (memory/encryption): start improvments, stop and getSession:
Goffi <goffi@goffi.org>
parents: 2646
diff changeset
205
2658
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
206 if replace:
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
207 # there is a conflict, but replacement is requested
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
208 # so we stop previous encryption to use new one
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
209 del self._sessions[bare_jid]
2743
da59ff099b32 core (memory/encryption), plugin OTR: finished OTR integration in encryption:
Goffi <goffi@goffi.org>
parents: 2733
diff changeset
210 yield self._stopEncryption(former_plugin, entity)
2658
4e130cc9bfc0 core (memore/encryption): new methods and checks:
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diff changeset
211 else:
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
212 msg = (_(u"Session with {bare_jid} is already encrypted with {name}. "
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
213 u"Please stop encryption session before changing algorithm.")
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
214 .format(bare_jid=bare_jid, name=plugin.name))
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
215 log.warning(msg)
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
216 raise exceptions.ConflictError(msg)
2651
ebcff5423465 core (memory/encryption): start improvments, stop and getSession:
Goffi <goffi@goffi.org>
parents: 2646
diff changeset
217
2658
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
218 data = {"plugin": plugin}
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
219 if plugin.directed:
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
220 if not entity.resource:
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
221 entity.resource = self.host.memory.getMainResource(self.client, entity)
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
222 if not entity.resource:
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
223 raise exceptions.NotFound(
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
224 _(u"No resource found for {destinee}, can't encrypt with {name}")
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
225 .format(destinee=entity.full(), name=plugin.name))
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
226 log.info(_(u"No resource specified to encrypt with {name}, using "
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
227 u"{destinee}.").format(destinee=entity.full(),
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
228 name=plugin.name))
2646
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Goffi <goffi@goffi.org>
parents:
diff changeset
229 # indicate that we encrypt only for some devices
2658
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parents: 2651
diff changeset
230 directed_devices = data[u'directed_devices'] = [entity.resource]
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
231 elif entity.resource:
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
232 raise ValueError(_(u"{name} encryption must be used with bare jids."))
2646
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
233
2743
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Goffi <goffi@goffi.org>
parents: 2733
diff changeset
234 yield self._startEncryption(plugin, entity)
2646
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Goffi <goffi@goffi.org>
parents:
diff changeset
235 self._sessions[entity.userhostJID()] = data
2658
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
236 log.info(_(u"Encryption session has been set for {entity_jid} with "
2646
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
237 u"{encryption_name}").format(
2658
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
238 entity_jid=entity.full(), encryption_name=plugin.name))
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
239 self.host.bridge.messageEncryptionStarted(
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
240 entity.full(),
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
241 self.getBridgeData(data),
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
242 self.client.profile)
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
243 msg = D_(u"Encryption session started: your messages with {destinee} are "
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
244 u"now end to end encrypted using {name} algorithm.").format(
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
245 destinee=entity.full(), name=plugin.name)
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
246 directed_devices = data.get(u'directed_devices')
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
247 if directed_devices:
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
248 msg += u"\n" + D_(u"Message are encrypted only for {nb_devices} device(s): "
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
249 u"{devices_list}.").format(
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
250 nb_devices=len(directed_devices),
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
251 devices_list = u', '.join(directed_devices))
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
252
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
253 self.client.feedback(bare_jid, msg)
2646
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parents:
diff changeset
254
2743
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Goffi <goffi@goffi.org>
parents: 2733
diff changeset
255 @defer.inlineCallbacks
2651
ebcff5423465 core (memory/encryption): start improvments, stop and getSession:
Goffi <goffi@goffi.org>
parents: 2646
diff changeset
256 def stop(self, entity, namespace=None):
2658
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
257 """Stop an encryption session with an entity
2651
ebcff5423465 core (memory/encryption): start improvments, stop and getSession:
Goffi <goffi@goffi.org>
parents: 2646
diff changeset
258
2658
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
259 @param entity(jid.JID): entity with who the encryption session must be stopped
2651
ebcff5423465 core (memory/encryption): start improvments, stop and getSession:
Goffi <goffi@goffi.org>
parents: 2646
diff changeset
260 must be bare jid is the algorithm encrypt for all devices
ebcff5423465 core (memory/encryption): start improvments, stop and getSession:
Goffi <goffi@goffi.org>
parents: 2646
diff changeset
261 @param namespace(unicode): namespace of the session to stop
ebcff5423465 core (memory/encryption): start improvments, stop and getSession:
Goffi <goffi@goffi.org>
parents: 2646
diff changeset
262 when specified, used to check we stop the right encryption session
ebcff5423465 core (memory/encryption): start improvments, stop and getSession:
Goffi <goffi@goffi.org>
parents: 2646
diff changeset
263 """
ebcff5423465 core (memory/encryption): start improvments, stop and getSession:
Goffi <goffi@goffi.org>
parents: 2646
diff changeset
264 session = self.getSession(entity.userhostJID())
ebcff5423465 core (memory/encryption): start improvments, stop and getSession:
Goffi <goffi@goffi.org>
parents: 2646
diff changeset
265 if not session:
2743
da59ff099b32 core (memory/encryption), plugin OTR: finished OTR integration in encryption:
Goffi <goffi@goffi.org>
parents: 2733
diff changeset
266 raise failure.Failure(
da59ff099b32 core (memory/encryption), plugin OTR: finished OTR integration in encryption:
Goffi <goffi@goffi.org>
parents: 2733
diff changeset
267 exceptions.NotFound(_(u"There is no encryption session with this "
da59ff099b32 core (memory/encryption), plugin OTR: finished OTR integration in encryption:
Goffi <goffi@goffi.org>
parents: 2733
diff changeset
268 u"entity.")))
2658
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
269 plugin = session['plugin']
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
270 if namespace is not None and plugin.namespace != namespace:
2651
ebcff5423465 core (memory/encryption): start improvments, stop and getSession:
Goffi <goffi@goffi.org>
parents: 2646
diff changeset
271 raise exceptions.InternalError(_(
2658
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
272 u"The encryption session is not run with the expected plugin: encrypted "
2651
ebcff5423465 core (memory/encryption): start improvments, stop and getSession:
Goffi <goffi@goffi.org>
parents: 2646
diff changeset
273 u"with {current_name} and was expecting {expected_name}").format(
ebcff5423465 core (memory/encryption): start improvments, stop and getSession:
Goffi <goffi@goffi.org>
parents: 2646
diff changeset
274 current_name=session[u'plugin'].namespace,
ebcff5423465 core (memory/encryption): start improvments, stop and getSession:
Goffi <goffi@goffi.org>
parents: 2646
diff changeset
275 expected_name=namespace))
ebcff5423465 core (memory/encryption): start improvments, stop and getSession:
Goffi <goffi@goffi.org>
parents: 2646
diff changeset
276 if entity.resource:
ebcff5423465 core (memory/encryption): start improvments, stop and getSession:
Goffi <goffi@goffi.org>
parents: 2646
diff changeset
277 try:
ebcff5423465 core (memory/encryption): start improvments, stop and getSession:
Goffi <goffi@goffi.org>
parents: 2646
diff changeset
278 directed_devices = session[u'directed_devices']
ebcff5423465 core (memory/encryption): start improvments, stop and getSession:
Goffi <goffi@goffi.org>
parents: 2646
diff changeset
279 except KeyError:
ebcff5423465 core (memory/encryption): start improvments, stop and getSession:
Goffi <goffi@goffi.org>
parents: 2646
diff changeset
280 raise exceptions.NotFound(_(
ebcff5423465 core (memory/encryption): start improvments, stop and getSession:
Goffi <goffi@goffi.org>
parents: 2646
diff changeset
281 u"There is a session for the whole entity (i.e. all devices of the "
ebcff5423465 core (memory/encryption): start improvments, stop and getSession:
Goffi <goffi@goffi.org>
parents: 2646
diff changeset
282 u"entity), not a directed one. Please use bare jid if you want to "
ebcff5423465 core (memory/encryption): start improvments, stop and getSession:
Goffi <goffi@goffi.org>
parents: 2646
diff changeset
283 u"stop the whole encryption with this entity."))
ebcff5423465 core (memory/encryption): start improvments, stop and getSession:
Goffi <goffi@goffi.org>
parents: 2646
diff changeset
284
ebcff5423465 core (memory/encryption): start improvments, stop and getSession:
Goffi <goffi@goffi.org>
parents: 2646
diff changeset
285 try:
ebcff5423465 core (memory/encryption): start improvments, stop and getSession:
Goffi <goffi@goffi.org>
parents: 2646
diff changeset
286 directed_devices.remove(entity.resource)
ebcff5423465 core (memory/encryption): start improvments, stop and getSession:
Goffi <goffi@goffi.org>
parents: 2646
diff changeset
287 except ValueError:
ebcff5423465 core (memory/encryption): start improvments, stop and getSession:
Goffi <goffi@goffi.org>
parents: 2646
diff changeset
288 raise exceptions.NotFound(_(u"There is no directed session with this "
ebcff5423465 core (memory/encryption): start improvments, stop and getSession:
Goffi <goffi@goffi.org>
parents: 2646
diff changeset
289 u"entity."))
2658
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
290 else:
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
291 if not directed_devices:
2743
da59ff099b32 core (memory/encryption), plugin OTR: finished OTR integration in encryption:
Goffi <goffi@goffi.org>
parents: 2733
diff changeset
292 # if we have no more directed device sessions,
da59ff099b32 core (memory/encryption), plugin OTR: finished OTR integration in encryption:
Goffi <goffi@goffi.org>
parents: 2733
diff changeset
293 # we stop the whole session
da59ff099b32 core (memory/encryption), plugin OTR: finished OTR integration in encryption:
Goffi <goffi@goffi.org>
parents: 2733
diff changeset
294 # see comment below for deleting session before stopping encryption
da59ff099b32 core (memory/encryption), plugin OTR: finished OTR integration in encryption:
Goffi <goffi@goffi.org>
parents: 2733
diff changeset
295 del self._sessions[entity.userhostJID()]
da59ff099b32 core (memory/encryption), plugin OTR: finished OTR integration in encryption:
Goffi <goffi@goffi.org>
parents: 2733
diff changeset
296 yield self._stopEncryption(plugin, entity)
2651
ebcff5423465 core (memory/encryption): start improvments, stop and getSession:
Goffi <goffi@goffi.org>
parents: 2646
diff changeset
297 else:
2743
da59ff099b32 core (memory/encryption), plugin OTR: finished OTR integration in encryption:
Goffi <goffi@goffi.org>
parents: 2733
diff changeset
298 # plugin's stopEncryption may call stop again (that's the case with OTR)
da59ff099b32 core (memory/encryption), plugin OTR: finished OTR integration in encryption:
Goffi <goffi@goffi.org>
parents: 2733
diff changeset
299 # so we need to remove plugin from session before calling self._stopEncryption
da59ff099b32 core (memory/encryption), plugin OTR: finished OTR integration in encryption:
Goffi <goffi@goffi.org>
parents: 2733
diff changeset
300 del self._sessions[entity.userhostJID()]
da59ff099b32 core (memory/encryption), plugin OTR: finished OTR integration in encryption:
Goffi <goffi@goffi.org>
parents: 2733
diff changeset
301 yield self._stopEncryption(plugin, entity)
2651
ebcff5423465 core (memory/encryption): start improvments, stop and getSession:
Goffi <goffi@goffi.org>
parents: 2646
diff changeset
302
2658
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
303 log.info(_(u"encryption session stopped with entity {entity}").format(
2651
ebcff5423465 core (memory/encryption): start improvments, stop and getSession:
Goffi <goffi@goffi.org>
parents: 2646
diff changeset
304 entity=entity.full()))
2658
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
305 self.host.bridge.messageEncryptionStopped(
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
306 entity.full(),
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
307 {'name': plugin.name,
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
308 'namespace': plugin.namespace,
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
309 },
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
310 self.client.profile)
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
311 msg = D_(u"Encryption session finished: your messages with {destinee} are "
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
312 u"NOT end to end encrypted anymore.\nYour server administrators or "
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
313 u"{destinee} server administrators will be able to read them.").format(
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
314 destinee=entity.full())
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
315
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
316 self.client.feedback(entity, msg)
2651
ebcff5423465 core (memory/encryption): start improvments, stop and getSession:
Goffi <goffi@goffi.org>
parents: 2646
diff changeset
317
ebcff5423465 core (memory/encryption): start improvments, stop and getSession:
Goffi <goffi@goffi.org>
parents: 2646
diff changeset
318 def getSession(self, entity):
ebcff5423465 core (memory/encryption): start improvments, stop and getSession:
Goffi <goffi@goffi.org>
parents: 2646
diff changeset
319 """Get encryption session for this contact
ebcff5423465 core (memory/encryption): start improvments, stop and getSession:
Goffi <goffi@goffi.org>
parents: 2646
diff changeset
320
ebcff5423465 core (memory/encryption): start improvments, stop and getSession:
Goffi <goffi@goffi.org>
parents: 2646
diff changeset
321 @param entity(jid.JID): get the session for this entity
ebcff5423465 core (memory/encryption): start improvments, stop and getSession:
Goffi <goffi@goffi.org>
parents: 2646
diff changeset
322 must be a bare jid
2658
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
323 @return (dict, None): encryption session data
2651
ebcff5423465 core (memory/encryption): start improvments, stop and getSession:
Goffi <goffi@goffi.org>
parents: 2646
diff changeset
324 None if there is not encryption for this session with this jid
ebcff5423465 core (memory/encryption): start improvments, stop and getSession:
Goffi <goffi@goffi.org>
parents: 2646
diff changeset
325 """
ebcff5423465 core (memory/encryption): start improvments, stop and getSession:
Goffi <goffi@goffi.org>
parents: 2646
diff changeset
326 if entity.resource:
2733
e347e32aa07f core (memory/encryption): new encryptionNamespaceGet and encryptionTrustUIGet methods:
Goffi <goffi@goffi.org>
parents: 2658
diff changeset
327 raise ValueError(u"Full jid given when expecting bare jid")
2651
ebcff5423465 core (memory/encryption): start improvments, stop and getSession:
Goffi <goffi@goffi.org>
parents: 2646
diff changeset
328 return self._sessions.get(entity)
ebcff5423465 core (memory/encryption): start improvments, stop and getSession:
Goffi <goffi@goffi.org>
parents: 2646
diff changeset
329
2733
e347e32aa07f core (memory/encryption): new encryptionNamespaceGet and encryptionTrustUIGet methods:
Goffi <goffi@goffi.org>
parents: 2658
diff changeset
330 def getTrustUI(self, entity_jid, namespace=None):
e347e32aa07f core (memory/encryption): new encryptionNamespaceGet and encryptionTrustUIGet methods:
Goffi <goffi@goffi.org>
parents: 2658
diff changeset
331 """Retrieve encryption UI
e347e32aa07f core (memory/encryption): new encryptionNamespaceGet and encryptionTrustUIGet methods:
Goffi <goffi@goffi.org>
parents: 2658
diff changeset
332
e347e32aa07f core (memory/encryption): new encryptionNamespaceGet and encryptionTrustUIGet methods:
Goffi <goffi@goffi.org>
parents: 2658
diff changeset
333 @param entity_jid(jid.JID): get the UI for this entity
e347e32aa07f core (memory/encryption): new encryptionNamespaceGet and encryptionTrustUIGet methods:
Goffi <goffi@goffi.org>
parents: 2658
diff changeset
334 must be a bare jid
e347e32aa07f core (memory/encryption): new encryptionNamespaceGet and encryptionTrustUIGet methods:
Goffi <goffi@goffi.org>
parents: 2658
diff changeset
335 @param namespace(unicode): namespace of the algorithm to manage
e347e32aa07f core (memory/encryption): new encryptionNamespaceGet and encryptionTrustUIGet methods:
Goffi <goffi@goffi.org>
parents: 2658
diff changeset
336 if None use current algorithm
e347e32aa07f core (memory/encryption): new encryptionNamespaceGet and encryptionTrustUIGet methods:
Goffi <goffi@goffi.org>
parents: 2658
diff changeset
337 @return D(xmlui): XMLUI for trust management
e347e32aa07f core (memory/encryption): new encryptionNamespaceGet and encryptionTrustUIGet methods:
Goffi <goffi@goffi.org>
parents: 2658
diff changeset
338 the xmlui is a form
e347e32aa07f core (memory/encryption): new encryptionNamespaceGet and encryptionTrustUIGet methods:
Goffi <goffi@goffi.org>
parents: 2658
diff changeset
339 None if there is not encryption for this session with this jid
e347e32aa07f core (memory/encryption): new encryptionNamespaceGet and encryptionTrustUIGet methods:
Goffi <goffi@goffi.org>
parents: 2658
diff changeset
340 @raise exceptions.NotFound: no algorithm/plugin found
e347e32aa07f core (memory/encryption): new encryptionNamespaceGet and encryptionTrustUIGet methods:
Goffi <goffi@goffi.org>
parents: 2658
diff changeset
341 @raise NotImplementedError: plugin doesn't handle UI management
e347e32aa07f core (memory/encryption): new encryptionNamespaceGet and encryptionTrustUIGet methods:
Goffi <goffi@goffi.org>
parents: 2658
diff changeset
342 """
e347e32aa07f core (memory/encryption): new encryptionNamespaceGet and encryptionTrustUIGet methods:
Goffi <goffi@goffi.org>
parents: 2658
diff changeset
343 if namespace is None:
e347e32aa07f core (memory/encryption): new encryptionNamespaceGet and encryptionTrustUIGet methods:
Goffi <goffi@goffi.org>
parents: 2658
diff changeset
344 session = self.getSession(entity_jid)
e347e32aa07f core (memory/encryption): new encryptionNamespaceGet and encryptionTrustUIGet methods:
Goffi <goffi@goffi.org>
parents: 2658
diff changeset
345 if not session:
e347e32aa07f core (memory/encryption): new encryptionNamespaceGet and encryptionTrustUIGet methods:
Goffi <goffi@goffi.org>
parents: 2658
diff changeset
346 raise exceptions.NotFound(
e347e32aa07f core (memory/encryption): new encryptionNamespaceGet and encryptionTrustUIGet methods:
Goffi <goffi@goffi.org>
parents: 2658
diff changeset
347 u"No encryption session currently active for {entity_jid}"
e347e32aa07f core (memory/encryption): new encryptionNamespaceGet and encryptionTrustUIGet methods:
Goffi <goffi@goffi.org>
parents: 2658
diff changeset
348 .format(entity_jid=entity_jid.full()))
e347e32aa07f core (memory/encryption): new encryptionNamespaceGet and encryptionTrustUIGet methods:
Goffi <goffi@goffi.org>
parents: 2658
diff changeset
349 plugin = session['plugin']
e347e32aa07f core (memory/encryption): new encryptionNamespaceGet and encryptionTrustUIGet methods:
Goffi <goffi@goffi.org>
parents: 2658
diff changeset
350 else:
e347e32aa07f core (memory/encryption): new encryptionNamespaceGet and encryptionTrustUIGet methods:
Goffi <goffi@goffi.org>
parents: 2658
diff changeset
351 plugin = self.getPlugin(namespace)
e347e32aa07f core (memory/encryption): new encryptionNamespaceGet and encryptionTrustUIGet methods:
Goffi <goffi@goffi.org>
parents: 2658
diff changeset
352 try:
e347e32aa07f core (memory/encryption): new encryptionNamespaceGet and encryptionTrustUIGet methods:
Goffi <goffi@goffi.org>
parents: 2658
diff changeset
353 get_trust_ui = plugin.instance.getTrustUI
e347e32aa07f core (memory/encryption): new encryptionNamespaceGet and encryptionTrustUIGet methods:
Goffi <goffi@goffi.org>
parents: 2658
diff changeset
354 except AttributeError:
e347e32aa07f core (memory/encryption): new encryptionNamespaceGet and encryptionTrustUIGet methods:
Goffi <goffi@goffi.org>
parents: 2658
diff changeset
355 raise NotImplementedError(
e347e32aa07f core (memory/encryption): new encryptionNamespaceGet and encryptionTrustUIGet methods:
Goffi <goffi@goffi.org>
parents: 2658
diff changeset
356 u"Encryption plugin doesn't handle trust management UI")
e347e32aa07f core (memory/encryption): new encryptionNamespaceGet and encryptionTrustUIGet methods:
Goffi <goffi@goffi.org>
parents: 2658
diff changeset
357 else:
2743
da59ff099b32 core (memory/encryption), plugin OTR: finished OTR integration in encryption:
Goffi <goffi@goffi.org>
parents: 2733
diff changeset
358 return defer.maybeDeferred(get_trust_ui, self.client, entity_jid)
2733
e347e32aa07f core (memory/encryption): new encryptionNamespaceGet and encryptionTrustUIGet methods:
Goffi <goffi@goffi.org>
parents: 2658
diff changeset
359
2646
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
360 ## Triggers ##
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
361
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
362 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
363 """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
364
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
365 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
366 # 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
367 return
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
368
712cb4ff3e13 core: new EncryptionHandler class which manage encrypted session as a core feature:
Goffi <goffi@goffi.org>
parents:
diff changeset
369 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
370 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
371 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
372 mess_data[C.MESS_KEY_ENCRYPTION] = encryption
2658
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
373
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
374 ## Misc ##
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
375
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
376 def markAsEncrypted(self, mess_data):
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
377 """Helper method to mark a message as having been e2e encrypted.
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
378
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
379 This should be used in the post_treat workflow of MessageReceived trigger of
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
380 the plugin
4e130cc9bfc0 core (memore/encryption): new methods and checks:
Goffi <goffi@goffi.org>
parents: 2651
diff changeset
381 @param mess_data(dict): message data as used in post treat workflow
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382 """
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383 mess_data[C.MESS_KEY_ENCRYPTED] = True
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384 return mess_data
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385
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386 def markAsTrusted(self, mess_data):
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387 """Helper methor to mark a message as sent from a trusted entity.
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388
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389 This should be used in the post_treat workflow of MessageReceived trigger of
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390 the plugin
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391 @param mess_data(dict): message data as used in post treat workflow
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392 """
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393 mess_data[C.MESS_KEY_TRUSTED] = True
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394 return mess_data
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395
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396 def markAsUntrusted(self, mess_data):
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397 """Helper methor to mark a message as sent from an untrusted entity.
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398
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399 This should be used in the post_treat workflow of MessageReceived trigger of
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400 the plugin
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401 @param mess_data(dict): message data as used in post treat workflow
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402 """
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403 mess_data['trusted'] = False
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404 return mess_data