Mercurial > libervia-backend

annotate libervia/backend/plugins/plugin_xep_0320.py @ 4219:1b5cf2ee1d86

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plugin XEP-0384, XEP-0391: download missing devices list: when a peer jid was not in our roster, devices list was not retrieved, resulting in failed en/decryption. This patch does check it and download missing devices list in necessary. There is no subscription managed yet, so the list won't be updated in case of new devices, this should be addressed at some point.
author Goffi <goffi@goffi.org>
date Tue, 05 Mar 2024 17:31:36 +0100
parents 4b842c1fb686
children
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1 #!/usr/bin/env python3
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2
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3 # Libervia plugin
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4 # Copyright (C) 2009-2023 Jérôme Poisson (goffi@goffi.org)
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5
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6 # This program is free software: you can redistribute it and/or modify
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7 # it under the terms of the GNU Affero General Public License as published by
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8 # the Free Software Foundation, either version 3 of the License, or
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9 # (at your option) any later version.
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10
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11 # This program is distributed in the hope that it will be useful,
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12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 # GNU Affero General Public License for more details.
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15
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16 # You should have received a copy of the GNU Affero General Public License
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17 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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18
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19 from twisted.words.protocols.jabber.xmlstream import XMPPHandler
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20 from twisted.words.xish import domish
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21 from wokkel import disco, iwokkel
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22 from zope.interface import implementer
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23
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24 from libervia.backend.core.constants import Const as C
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25 from libervia.backend.core.i18n import _
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26 from libervia.backend.core.log import getLogger
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27
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28
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29 log = getLogger(__name__)
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30
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31 NS_JINGLE_DTLS = "urn:xmpp:jingle:apps:dtls:0"
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32
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33 PLUGIN_INFO = {
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34 C.PI_NAME: "Use of DTLS-SRTP in Jingle Sessions",
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35 C.PI_IMPORT_NAME: "XEP-0320",
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36 C.PI_TYPE: "XEP",
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37 C.PI_MODES: C.PLUG_MODE_BOTH,
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38 C.PI_PROTOCOLS: ["XEP-0320"],
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39 C.PI_DEPENDENCIES: ["XEP-0176"],
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40 C.PI_RECOMMENDATIONS: [],
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41 C.PI_MAIN: "XEP_0320",
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42 C.PI_HANDLER: "yes",
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43 C.PI_DESCRIPTION: _("""Use of DTLS-SRTP with RTP (for e2ee of A/V calls)"""),
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44 }
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45
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46
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47 class XEP_0320:
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48 def __init__(self, host):
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49 log.info(f"plugin {PLUGIN_INFO[C.PI_NAME]!r} initialization")
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50 host.trigger.add("XEP-0176_parse_transport", self._parse_transport_trigger)
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51 host.trigger.add("XEP-0176_build_transport", self._build_transport_trigger)
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52
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53 def get_handler(self, client):
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54 return XEP_0320_handler()
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55
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56 def _parse_transport_trigger(
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57 self, transport_elt: domish.Element, ice_data: dict
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58 ) -> bool:
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59 """Parse the <fingerprint> element"""
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60 fingerprint_elt = next(
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61 transport_elt.elements(NS_JINGLE_DTLS, "fingerprint"), None
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62 )
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63 if fingerprint_elt is not None:
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64 try:
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65 ice_data["fingerprint"] = {
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66 "hash": fingerprint_elt["hash"],
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67 "setup": fingerprint_elt["setup"],
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68 "fingerprint": str(fingerprint_elt),
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69 }
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70 except KeyError as e:
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71 log.warning(
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72 f"invalid <fingerprint> (attribue {e} is missing): "
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73 f"{fingerprint_elt.toXml()})"
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74 )
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75
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76 return True
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77
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78 def _build_transport_trigger(
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79 self, tranport_elt: domish.Element, ice_data: dict
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80 ) -> bool:
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81 """Build the <fingerprint> element if possible"""
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82 try:
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83 fingerprint_data = ice_data["fingerprint"]
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84 hash_ = fingerprint_data["hash"]
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85 setup = fingerprint_data["setup"]
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86 fingerprint = fingerprint_data["fingerprint"]
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87 except KeyError:
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88 pass
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89 else:
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90 fingerprint_elt = tranport_elt.addElement(
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91 (NS_JINGLE_DTLS, "fingerprint"), content=fingerprint
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92 )
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93 fingerprint_elt["hash"] = hash_
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94 fingerprint_elt["setup"] = setup
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95
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96 return True
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97
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98
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99 @implementer(iwokkel.IDisco)
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100 class XEP_0320_handler(XMPPHandler):
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101 def getDiscoInfo(self, requestor, target, nodeIdentifier=""):
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102 return [disco.DiscoFeature(NS_JINGLE_DTLS)]
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103
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104 def getDiscoItems(self, requestor, target, nodeIdentifier=""):
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105 return []