Mercurial > libervia-backend

annotate libervia/backend/plugins/plugin_xep_0280.py @ 4351:6a0a081485b8

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plugin autocrypt: Autocrypt protocol implementation: Implementation of autocrypt: `autocrypt` header is checked, and if present and no public key is known for the peer, the key is imported. `autocrypt` header is also added to outgoing message (only if an email gateway is detected). For the moment, the JID is use as identifier, but the real email used by gateway should be used in the future. rel 456
author Goffi <goffi@goffi.org>
date Fri, 28 Feb 2025 09:23:35 +0100
parents 0d7bb4df2343
children
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rev   line source
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1 #!/usr/bin/env python3
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2
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3
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4 # SAT plugin for managing xep-0280
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5 # Copyright (C) 2009-2021 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 libervia.backend.core.i18n import _, D_
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21 from libervia.backend.core.log import getLogger
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22
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23 log = getLogger(__name__)
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24 from libervia.backend.core import exceptions
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25 from libervia.backend.core.constants import Const as C
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26 from twisted.words.protocols.jabber.error import StanzaError
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27 from twisted.internet import defer
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28 from wokkel import disco, iwokkel
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29 from zope.interface import implementer
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30
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31 try:
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32 from twisted.words.protocols.xmlstream import XMPPHandler
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33 except ImportError:
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34 from wokkel.subprotocols import XMPPHandler
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36
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37 PARAM_CATEGORY = "Misc"
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38 PARAM_NAME = "carbon"
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39 PARAM_LABEL = D_("Message carbons")
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40 NS_CARBONS = "urn:xmpp:carbons:2"
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41
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42 PLUGIN_INFO = {
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43 C.PI_NAME: "XEP-0280 Plugin",
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44 C.PI_IMPORT_NAME: "XEP-0280",
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45 C.PI_TYPE: "XEP",
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46 C.PI_PROTOCOLS: ["XEP-0280"],
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47 C.PI_DEPENDENCIES: [],
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48 C.PI_MAIN: "XEP_0280",
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49 C.PI_HANDLER: "yes",
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50 C.PI_DESCRIPTION: D_("""Implementation of Message Carbons"""),
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51 }
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54 class XEP_0280(object):
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55 #  TODO: param is only checked at profile connection
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56 # activate carbons on param change even after profile connection
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57 # TODO: chat state notifications are not handled yet (and potentially other XEPs?)
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58
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59 params = """
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60 <params>
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61 <individual>
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62 <category name="{category_name}" label="{category_label}">
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63 <param name="{param_name}" label="{param_label}" value="true" type="bool" security="0" />
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64 </category>
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65 </individual>
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66 </params>
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67 """.format(
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68 category_name=PARAM_CATEGORY,
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69 category_label=D_(PARAM_CATEGORY),
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70 param_name=PARAM_NAME,
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71 param_label=PARAM_LABEL,
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72 )
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73
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74 def __init__(self, host):
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75 log.info(_("Plugin XEP_0280 initialization"))
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76 self.host = host
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77 host.memory.update_params(self.params)
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78 host.trigger.add(
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79 "message_received", self.message_received_trigger, priority=200000
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80 )
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81
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82 def get_handler(self, client):
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83 return XEP_0280_handler()
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84
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85 def set_private(self, message_elt):
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86 """Add a <private/> element to a message
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87
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88 this method is intented to be called on final domish.Element by other plugins
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89 (in particular end 2 end encryption plugins)
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90 @param message_elt(domish.Element): <message> stanza
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91 """
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92 if message_elt.name != "message":
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93 log.error("addPrivateElt must be used with <message> stanzas")
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94 return
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95 message_elt.addElement((NS_CARBONS, "private"))
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96
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97 @defer.inlineCallbacks
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98 def profile_connected(self, client):
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99 """activate message carbons on connection if possible and activated in config"""
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100 activate = self.host.memory.param_get_a(
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101 PARAM_NAME, PARAM_CATEGORY, profile_key=client.profile
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102 )
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103 if not activate:
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104 log.info(_("Not activating message carbons as requested in params"))
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105 return
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106 try:
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107 yield self.host.check_features(client, (NS_CARBONS,))
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108 except exceptions.FeatureNotFound:
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109 log.warning(_("server doesn't handle message carbons"))
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110 else:
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111 log.info(_("message carbons available, enabling it"))
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112 iq_elt = client.IQ()
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113 iq_elt.addElement((NS_CARBONS, "enable"))
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114 try:
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115 yield iq_elt.send()
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116 except StanzaError as e:
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117 log.warning("Can't activate message carbons: {}".format(e))
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118 else:
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119 log.info(_("message carbons activated"))
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120
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121 def message_received_trigger(self, client, message_elt, post_treat):
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122 """get message and handle it if carbons namespace is present"""
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123 for e in message_elt.elements():
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124 if e.uri == NS_CARBONS and e.name in ("received", "sent"):
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125 carbons_elt = e
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126 break
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127 else:
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128 # this is not a message carbons,
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129 # we continue normal behaviour
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130 return True
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131
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132 if message_elt["from"] != client.jid.userhost():
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133 log.warning(
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134 "The message carbon received is not from our server, hack attempt?\n{xml}".format(
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135 xml=message_elt.toXml()
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136 )
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137 )
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138 return
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139 forwarded_elt = next(carbons_elt.elements(C.NS_FORWARD, "forwarded"))
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140 cc_message_elt = next(forwarded_elt.elements(C.NS_CLIENT, "message"))
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141
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142 # we replace the wrapping message with the CCed one
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143 # and continue the normal behaviour
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144 message_elt["type"] = cc_message_elt.getAttribute("type", C.MESS_TYPE_NORMAL)
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145 mess_id = cc_message_elt.getAttribute("id")
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146 if mess_id:
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147 message_elt[mess_id] = mess_id
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148 if carbons_elt.name == "received":
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149 message_elt["from"] = cc_message_elt["from"]
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150 lang = cc_message_elt.getAttribute("xml:lang")
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151 if lang:
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152 message_elt["xml:lang"] = lang
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153 elif carbons_elt.name == "sent":
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154 # the cc_message_elt is the full JID, so we copy it
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155 message_elt["from"] = cc_message_elt["from"]
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156 try:
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157 message_elt["to"] = cc_message_elt["to"]
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158 except KeyError:
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159 # we may not have "to" in case of message from ourself (from an other
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160 # device)
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161 pass
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162 else:
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163 log.warning(
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164 "invalid message carbons received:\n{xml}".format(xml=message_elt.toXml())
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165 )
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166 return False
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167
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168 del message_elt.children[:]
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169 for c in cc_message_elt.children:
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170 message_elt.addChild(c)
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171
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172 return True
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173
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174
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175 @implementer(iwokkel.IDisco)
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176 class XEP_0280_handler(XMPPHandler):
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177
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178 def getDiscoInfo(self, requestor, target, nodeIdentifier=""):
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179 return [disco.DiscoFeature(NS_CARBONS)]
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180
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181 def getDiscoItems(self, requestor, target, nodeIdentifier=""):
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182 return []