annotate src/plugins/plugin_sec_otr.py @ 1057:7ea0215e7092

test: fixes the tests for plugin XEP-0033
author souliane <souliane@mailoo.org>
date Sun, 08 Jun 2014 17:39:21 +0200
parents abcac1ac27a7
children ef7b7dd5c5db
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 #!/usr/bin/python
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2 # -*- coding: utf-8 -*-
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3
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4 # SAT plugin for OTR encryption
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5 # Copyright (C) 2009, 2010, 2011, 2012, 2013, 2014 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 # XXX: thanks to Darrik L Mazey for his documentation (https://blog.darmasoft.net/2013/06/30/using-pure-python-otr.html)
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21 # this implentation is based on it
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22
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23 from sat.core.i18n import _
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24 from sat.core.log import getLogger
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25 from sat.core import exceptions
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26 log = getLogger(__name__)
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27 from twisted.words.protocols.jabber import jid
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28 from twisted.python import failure
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29 import potr
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30
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31 DEFAULT_POLICY_FLAGS = {
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32 'ALLOW_V1':False,
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33 'ALLOW_V2':True,
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34 'REQUIRE_ENCRYPTION':True,
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35 }
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36
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37 PLUGIN_INFO = {
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38 "name": "OTR",
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39 "import_name": "OTR",
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40 "type": "SEC",
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41 "protocols": [],
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42 "dependencies": [],
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43 "main": "OTR",
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44 "handler": "no",
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45 "description": _("""Implementation of OTR""")
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46 }
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47
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48
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49 PROTOCOL='xmpp'
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50 MMS=1024
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51
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52
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53 class Context(potr.context.Context):
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54
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55 def __init__(self, host, account, peer):
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56 super(Context, self).__init__(account, peer)
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57 self.host = host
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58
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59 def getPolicy(self, key):
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60 if key in DEFAULT_POLICY_FLAGS:
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61 return DEFAULT_POLICY_FLAGS[key]
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62 else:
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63 return False
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64
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65 def inject(self, msg, appdata=None):
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66 to_jid, profile = appdata
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67 assert isinstance(to_jid, jid.JID)
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68 client = self.host.getClient(profile)
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69 log.debug('inject(%s, appdata=%s, to=%s)' % (msg, appdata, to_jid))
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70 mess_data = {'message': msg,
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71 'type': 'chat',
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72 'from': client.jid,
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73 'to': to_jid,
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74 'subject': None,
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75 }
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76 self.host.generateMessageXML(mess_data)
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77 client.xmlstream.send(mess_data['xml'])
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78
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79 def setState(self, state):
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80 super(Context, self).setState(state)
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81 log.debug("setState: %s (self = %s)" % (state, self))
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82 # TODO: send signal to frontends, maybe a message feedback too
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83
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84
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85 class Account(potr.context.Account):
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86
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87 def __init__(self, account_jid):
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88 global PROTOCOL, MMS
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89 assert isinstance(account_jid, jid.JID)
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90 log.debug("new account: %s" % account_jid)
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91 super(Account, self).__init__(account_jid, PROTOCOL, MMS)
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92
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93 def loadPrivkey(self):
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94 # TODO
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95 log.debug("loadPrivkey")
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96 return None
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97
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98 def savePrivkey(self):
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99 # TODO
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100 log.debug("savePrivkey")
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101
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102
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103 class ContextManager(object):
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104
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105 def __init__(self, host, client):
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106 self.host = host
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107 self.account = Account(client.jid)
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108 self.contexts = {}
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109
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110 def startContext(self, other):
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111 assert isinstance(other, jid.JID)
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112 if not other in self.contexts:
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113 self.contexts[other] = Context(self.host, self.account, other)
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114 return self.contexts[other]
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115
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116 def getContextForUser(self, other):
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117 log.debug("getContextForUser [%s]" % other)
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118 return self.startContext(other)
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119
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120
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121 class OTR(object):
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122
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123 def __init__(self, host):
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124 log.info(_("OTR plugin initialization"))
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125 self.host = host
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126 self.context_managers = {}
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127 host.trigger.add("MessageReceived", self.MessageReceivedTrigger, priority=100000)
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128 host.trigger.add("sendMessage", self.sendMessageTrigger, priority=100000)
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129
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130 def profileConnected(self, profile):
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131 client = self.host.getClient(profile)
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132 self.context_managers[profile] = ContextManager(self.host, client)
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133
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134 def _receivedTreatment(self, data, profile):
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135 from_jid = jid.JID(data['from'])
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136 log.debug("_receivedTreatment [from_jid = %s]" % from_jid)
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137 otrctx = self.context_managers[profile].getContextForUser(from_jid)
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138
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139 encrypted = True
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140 try:
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141 res = otrctx.receiveMessage(data['body'].encode('utf-8'), appdata=(from_jid, profile))
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142 except potr.context.UnencryptedMessage:
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143 log.warning("Received unencrypted message in an encrypted context")
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144 # TODO: feedback to frontends (either message or popup)
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145 encrypted = False
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146
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147 if encrypted == False:
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148 return data
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149 else:
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150 if res[0] != None:
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151 # decrypted messages handling.
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152 # receiveMessage() will return a tuple, the first part of which will be the decrypted message
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153 data['body'] = res[0].decode('utf-8')
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154 raise failure.Failure(exceptions.SkipHistory()) # we send the decrypted message to frontends, but we don't want it in history
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155 else:
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156 raise failure.Failure(exceptions.CancelError()) # no message at all (no history, no signal)
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157
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Goffi <goffi@goffi.org>
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158 def MessageReceivedTrigger(self, message, post_treat, profile):
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159 post_treat.addCallback(self._receivedTreatment, profile)
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160 return True
abcac1ac27a7 plugin otr: first draft
Goffi <goffi@goffi.org>
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161
abcac1ac27a7 plugin otr: first draft
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162 def sendMessageTrigger(self, mess_data, pre_xml_treatments, post_xml_treatments, profile):
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163 to_jid = mess_data['to']
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164 if mess_data['type'] != 'groupchat' and not to_jid.resource:
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165 to_jid.resource = self.host.memory.getLastResource(to_jid, profile) # FIXME: it's dirty, but frontends don't manage resources correctly now, refactoring is planed
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166 otrctx = self.context_managers[profile].getContextForUser(to_jid)
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167 if mess_data['type'] != 'groupchat' and otrctx.state == potr.context.STATE_ENCRYPTED:
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Goffi <goffi@goffi.org>
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168 log.debug("encrypting message")
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169 otrctx.sendMessage(0, mess_data['message'].encode('utf-8'), appdata=(to_jid, profile))
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170 client = self.host.getClient(profile)
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171 self.host.sendMessageToBridge(mess_data, client)
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172 return False
abcac1ac27a7 plugin otr: first draft
Goffi <goffi@goffi.org>
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173 else:
abcac1ac27a7 plugin otr: first draft
Goffi <goffi@goffi.org>
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174 log.debug("sending message unencrypted")
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175 return True
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176