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annotate sat/plugins/plugin_xep_0359.py @ 3951:4b8776eb6826

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doc (blog, pubsub): documentation on new e2ee arguments for pubsub, and shared secrets handling: fix 380
author Goffi <goffi@goffi.org>
date Sat, 15 Oct 2022 20:38:33 +0200
parents 8289ac1b34f4
children 524856bd7b19
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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 Message Archive Management (XEP-0359)
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5 # Copyright (C) 2009-2021 Jérôme Poisson (goffi@goffi.org)
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6 # Copyright (C) 2013-2016 Adrien Cossa (souliane@mailoo.org)
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7
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8 # This program is free software: you can redistribute it and/or modify
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9 # it under the terms of the GNU Affero General Public License as published by
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10 # the Free Software Foundation, either version 3 of the License, or
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11 # (at your option) any later version.
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12
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13 # This program is distributed in the hope that it will be useful,
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14 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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16 # GNU Affero General Public License for more details.
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17
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18 # You should have received a copy of the GNU Affero General Public License
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19 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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20
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21 from typing import Optional
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22 import uuid
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23 from zope.interface import implementer
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24 from twisted.words.protocols.jabber import xmlstream
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25 from wokkel import disco
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26 from sat.core.constants import Const as C
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27 from sat.core import exceptions
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28 from sat.core.i18n import _
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29 from sat.core.log import getLogger
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30 from twisted.words.xish import domish
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31
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32 log = getLogger(__name__)
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35 PLUGIN_INFO = {
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36 C.PI_NAME: "Unique and Stable Stanza IDs",
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37 C.PI_IMPORT_NAME: "XEP-0359",
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38 C.PI_TYPE: "XEP",
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39 C.PI_PROTOCOLS: ["XEP-0359"],
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40 C.PI_MAIN: "XEP_0359",
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41 C.PI_HANDLER: "yes",
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42 C.PI_DESCRIPTION: _("""Implementation of Unique and Stable Stanza IDs"""),
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43 }
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44
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45 NS_SID = "urn:xmpp:sid:0"
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47
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48 class XEP_0359(object):
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49
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50 def __init__(self, host):
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51 log.info(_("Unique and Stable Stanza IDs plugin initialization"))
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52 self.host = host
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53 host.registerNamespace("stanza_id", NS_SID)
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54 host.trigger.add("message_parse", self._message_parseTrigger)
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55 host.trigger.add("sendMessageData", self._sendMessageDataTrigger)
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56
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57 def _message_parseTrigger(self, client, message_elt, mess_data):
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58 """Check if message has a stanza-id"""
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59 stanza_id = self.getStanzaId(message_elt, client.jid.userhostJID())
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60 if stanza_id is not None:
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61 mess_data['extra']['stanza_id'] = stanza_id
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62 origin_id = self.getOriginId(message_elt)
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63 if origin_id is not None:
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64 mess_data['extra']['origin_id'] = origin_id
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65 return True
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66
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67 def _sendMessageDataTrigger(self, client, mess_data):
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68 origin_id = mess_data["extra"].get("origin_id")
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69 if not origin_id:
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70 origin_id = str(uuid.uuid4())
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71 mess_data["extra"]["origin_id"] = origin_id
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72 message_elt = mess_data["xml"]
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73 self.addOriginId(message_elt, origin_id)
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74
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75 def getStanzaId(self, element, by):
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76 """Return stanza-id if found in element
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77
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78 @param element(domish.Element): element to parse
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79 @param by(jid.JID): entity which should have set a stanza-id
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80 @return (unicode, None): stanza-id if found
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81 """
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82 stanza_id = None
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83 for stanza_elt in element.elements(NS_SID, "stanza-id"):
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84 if stanza_elt.getAttribute("by") == by.full():
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85 if stanza_id is not None:
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86 # we must not have more than one element (§3 #4)
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87 raise exceptions.DataError(
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88 "More than one corresponding stanza-id found!")
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89 stanza_id = stanza_elt.getAttribute("id")
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90 # we don't break to be sure that there is no more than one element
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91 # with this "by" attribute
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92
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93 return stanza_id
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94
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95 def addStanzaId(self, client, element, stanza_id, by=None):
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96 """Add a <stanza-id/> to a stanza
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97
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98 @param element(domish.Element): stanza where the <stanza-id/> must be added
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99 @param stanza_id(unicode): id to use
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100 @param by(jid.JID, None): jid to use or None to use client.jid
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101 """
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102 sid_elt = element.addElement((NS_SID, "stanza-id"))
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103 sid_elt["by"] = client.jid.userhost() if by is None else by.userhost()
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104 sid_elt["id"] = stanza_id
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105
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106 def getOriginId(self, element: domish.Element) -> Optional[str]:
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107 """Return origin-id if found in element
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108
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109 @param element: element to parse
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110 @return: origin-id if found
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111 """
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112 try:
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113 origin_elt = next(element.elements(NS_SID, "origin-id"))
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114 except StopIteration:
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115 return None
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116 else:
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117 return origin_elt.getAttribute("id")
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118
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119 def addOriginId(self, element, origin_id=None):
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120 """Add a <origin-id/> to a stanza
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121
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122 @param element(domish.Element): stanza where the <origin-id/> must be added
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123 @param origin_id(str): id to use, None to automatically generate
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124 @return (str): origin_id
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125 """
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126 if origin_id is None:
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127 origin_id = str(uuid.uuid4())
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128 sid_elt = element.addElement((NS_SID, "origin-id"))
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129 sid_elt["id"] = origin_id
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130 return origin_id
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131
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132 def getHandler(self, client):
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133 return XEP_0359_handler()
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134
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135
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ab2696e34d29 Python 3 port:
Goffi <goffi@goffi.org>
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136 @implementer(disco.IDisco)
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137 class XEP_0359_handler(xmlstream.XMPPHandler):
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138
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139 def getDiscoInfo(self, requestor, target, nodeIdentifier=""):
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140 return [disco.DiscoFeature(NS_SID)]
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141
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142 def getDiscoItems(self, requestor, target, nodeIdentifier=""):
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143 return []