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annotate sat/plugins/plugin_xep_0261.py @ 3237:b0c57c9a4bd8

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plugin XEP-0384: OMEMO trust policy: OMEMO trust policy can now be specified. For now there are 2 policies: - `manual`: each new device fingerprint must be explicitly trusted or not before the device can be used, and the message sent - `BTBV` (Blind Trust Before Verification): each new device fingerprint is automically trusted, until user manually trust or not a device, in which case the behaviour becomes the same as for `manual` for the entity. When using the Trust UI, user can put the entity back to blind trust if they wish. A message is send as feedback to user when a new device is/must be trusted, trying to explain clearly what's happening to the user. Devices which have been automically trusted are marked, so user can know which ones may cause security issue.
author Goffi <goffi@goffi.org>
date Fri, 27 Mar 2020 10:02:14 +0100
parents 559a625a236b
children be6d91572633
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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 Jingle (XEP-0261)
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5 # Copyright (C) 2009-2020 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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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 _
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21 from sat.core.constants import Const as C
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22 from sat.core.log import getLogger
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23
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24 log = getLogger(__name__)
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25 from wokkel import disco, iwokkel
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26 from zope.interface import implementer
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27 from twisted.words.xish import domish
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28 import uuid
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29
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30 try:
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31 from twisted.words.protocols.xmlstream import XMPPHandler
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32 except ImportError:
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33 from wokkel.subprotocols import XMPPHandler
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35
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36 NS_JINGLE_IBB = "urn:xmpp:jingle:transports:ibb:1"
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37
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38 PLUGIN_INFO = {
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39 C.PI_NAME: "Jingle In-Band Bytestreams",
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40 C.PI_IMPORT_NAME: "XEP-0261",
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41 C.PI_TYPE: "XEP",
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42 C.PI_MODES: C.PLUG_MODE_BOTH,
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43 C.PI_PROTOCOLS: ["XEP-0261"],
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44 C.PI_DEPENDENCIES: ["XEP-0166", "XEP-0047"],
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45 C.PI_MAIN: "XEP_0261",
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46 C.PI_HANDLER: "yes",
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47 C.PI_DESCRIPTION: _("""Implementation of Jingle In-Band Bytestreams"""),
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48 }
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50
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51 class XEP_0261(object):
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52 NAMESPACE = NS_JINGLE_IBB # used by XEP-0260 plugin for transport-replace
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53
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54 def __init__(self, host):
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55 log.info(_("plugin Jingle In-Band Bytestreams"))
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56 self.host = host
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57 self._j = host.plugins["XEP-0166"] # shortcut to access jingle
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58 self._ibb = host.plugins["XEP-0047"] # and in-band bytestream
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59 self._j.registerTransport(
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60 NS_JINGLE_IBB, self._j.TRANSPORT_STREAMING, self, -10000
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61 ) # must be the lowest priority
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62
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63 def getHandler(self, client):
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64 return XEP_0261_handler()
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65
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66 def jingleSessionInit(self, client, session, content_name):
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67 transport_elt = domish.Element((NS_JINGLE_IBB, "transport"))
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68 content_data = session["contents"][content_name]
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69 transport_data = content_data["transport_data"]
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70 transport_data["block_size"] = self._ibb.BLOCK_SIZE
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71 transport_elt["block-size"] = str(transport_data["block_size"])
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72 transport_elt["sid"] = transport_data["sid"] = str(uuid.uuid4())
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73 return transport_elt
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74
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75 def jingleHandler(self, client, action, session, content_name, transport_elt):
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76 content_data = session["contents"][content_name]
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77 transport_data = content_data["transport_data"]
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78 if action in (
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79 self._j.A_SESSION_ACCEPT,
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80 self._j.A_ACCEPTED_ACK,
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81 self._j.A_TRANSPORT_ACCEPT,
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82 ):
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83 pass
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84 elif action in (self._j.A_SESSION_INITIATE, self._j.A_TRANSPORT_REPLACE):
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85 transport_data["sid"] = transport_elt["sid"]
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86 elif action in (self._j.A_START, self._j.A_PREPARE_RESPONDER):
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87 local_jid = session["local_jid"]
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88 peer_jid = session["peer_jid"]
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89 sid = transport_data["sid"]
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90 stream_object = content_data["stream_object"]
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91 if action == self._j.A_START:
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92 block_size = transport_data["block_size"]
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93 d = self._ibb.startStream(
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94 client, stream_object, local_jid, peer_jid, sid, block_size
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95 )
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96 d.chainDeferred(content_data["finished_d"])
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97 else:
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98 d = self._ibb.createSession(
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99 client, stream_object, local_jid, peer_jid, sid)
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100 d.chainDeferred(content_data["finished_d"])
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101 else:
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102 log.warning("FIXME: unmanaged action {}".format(action))
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103 return transport_elt
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104
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105
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106 @implementer(iwokkel.IDisco)
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107 class XEP_0261_handler(XMPPHandler):
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108
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109 def getDiscoInfo(self, requestor, target, nodeIdentifier=""):
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110 return [disco.DiscoFeature(NS_JINGLE_IBB)]
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111
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112 def getDiscoItems(self, requestor, target, nodeIdentifier=""):
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113 return []