Mercurial > libervia-backend
annotate sat/plugins/plugin_xep_0422.py @ 3966:9f85369294f3
doc (encryption, cli): pubsub signing documentation:
- add a `Pubsub Signature` section to `encryption` documentation
- document `-X, --sign` flag where it's used
- document `pubsub/signature` subcommands
fix 381
author | Goffi <goffi@goffi.org> |
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date | Sun, 30 Oct 2022 01:06:58 +0200 |
parents | 60724ff3f273 |
children | 524856bd7b19 |
rev | line source |
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3799
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1 #!/usr/bin/env python3 |
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2 |
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3 # Copyright (C) 2009-2022 Jérôme Poisson (goffi@goffi.org) |
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4 |
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5 # This program is free software: you can redistribute it and/or modify |
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6 # it under the terms of the GNU Affero General Public License as published by |
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7 # the Free Software Foundation, either version 3 of the License, or |
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8 # (at your option) any later version. |
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9 |
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10 # This program is distributed in the hope that it will be useful, |
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11 # but WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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13 # GNU Affero General Public License for more details. |
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14 |
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15 # You should have received a copy of the GNU Affero General Public License |
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16 # along with this program. If not, see <http://www.gnu.org/licenses/>. |
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17 |
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18 from typing import Optional, List, Tuple, Union, NamedTuple |
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19 from collections import namedtuple |
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20 |
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21 from twisted.words.protocols.jabber import xmlstream |
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22 from twisted.words.xish import domish |
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23 from wokkel import disco |
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24 from zope.interface import implementer |
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25 |
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26 from sat.core.constants import Const as C |
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27 from sat.core.i18n import _ |
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28 from sat.core.log import getLogger |
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29 from sat.core.core_types import SatXMPPEntity |
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30 from sat.memory.sqla_mapping import History |
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31 from sat.tools.common.async_utils import async_lru |
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32 |
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33 log = getLogger(__name__) |
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34 |
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35 |
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36 PLUGIN_INFO = { |
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37 C.PI_NAME: "Message Fastening", |
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38 C.PI_IMPORT_NAME: "XEP-0422", |
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39 C.PI_TYPE: "XEP", |
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40 C.PI_MODES: C.PLUG_MODE_BOTH, |
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41 C.PI_PROTOCOLS: ["XEP-0359", "XEP-0422"], |
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42 C.PI_MAIN: "XEP_0422", |
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43 C.PI_HANDLER: "yes", |
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44 C.PI_DESCRIPTION: _("""Implementation Message Fastening"""), |
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45 } |
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46 |
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47 NS_FASTEN = "urn:xmpp:fasten:0" |
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48 |
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49 |
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50 class FastenMetadata(NamedTuple): |
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51 elements: List[domish.Element] |
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52 id: str |
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53 history: Optional[History] |
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54 clear: bool |
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55 shell: bool |
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56 |
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57 |
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58 class XEP_0422(object): |
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59 |
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60 def __init__(self, host): |
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61 log.info(_("XEP-0422 (Message Fastening) plugin initialization")) |
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62 self.host = host |
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63 host.registerNamespace("fasten", NS_FASTEN) |
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64 |
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65 def getHandler(self, __): |
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66 return XEP_0422_handler() |
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67 |
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68 def applyToElt( |
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69 self, |
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70 message_elt: domish.Element, |
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71 origin_id: str, |
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72 clear: Optional[bool] = None, |
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73 shell: Optional[bool] = None, |
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74 children: Optional[List[domish.Element]] = None, |
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75 external: Optional[List[Union[str, Tuple[str, str]]]] = None |
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76 ) -> domish.Element: |
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77 """Generate, add and return <apply-to> element |
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78 |
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79 @param message_elt: wrapping <message> element |
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80 @param origin_id: origin ID of the target message |
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81 @param clear: set to True to remove a fastening |
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82 @param shell: set to True when using e2ee shell |
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83 cf. https://xmpp.org/extensions/xep-0422.html#encryption |
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84 @param children: element to fasten to the target message |
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85 <apply-to> element is returned, thus children can also easily be added |
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86 afterwards |
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87 @param external: <external> element to add |
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88 cf. https://xmpp.org/extensions/xep-0422.html#external-payloads |
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89 the list items can either be a str with only the element name, |
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90 or a tuple which must then be (namespace, name) |
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91 @return: <apply-to> element, which is already added to the wrapping message_elt |
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92 """ |
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93 apply_to_elt = message_elt.addElement((NS_FASTEN, "apply-to")) |
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94 apply_to_elt["id"] = origin_id |
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95 if clear is not None: |
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96 apply_to_elt["clear"] = C.boolConst(clear) |
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97 if shell is not None: |
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98 apply_to_elt["shell"] = C.boolConst(shell) |
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99 if children is not None: |
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100 for child in children: |
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101 apply_to_elt.addChild(child) |
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102 if external is not None: |
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103 for ext in external: |
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104 external_elt = apply_to_elt.addElement("external") |
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105 if isinstance(ext, str): |
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106 external_elt["name"] = ext |
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107 else: |
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108 ns, name = ext |
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109 external_elt["name"] = name |
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110 external_elt["element-namespace"] = ns |
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111 return apply_to_elt |
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112 |
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113 @async_lru(maxsize=5) |
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114 async def getFastenedElts( |
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115 self, |
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116 client: SatXMPPEntity, |
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117 message_elt: domish.Element |
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118 ) -> Optional[FastenMetadata]: |
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119 """Get fastened elements |
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120 |
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121 if the message contains no <apply-to> element, None is returned |
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122 """ |
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123 try: |
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124 apply_to_elt = next(message_elt.elements(NS_FASTEN, "apply-to")) |
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125 except StopIteration: |
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126 return None |
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127 else: |
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128 origin_id = apply_to_elt.getAttribute("id") |
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129 if not origin_id: |
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130 log.warning( |
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131 f"Received invalid fastening message: {message_elt.toXml()}" |
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132 ) |
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133 return None |
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134 elements = apply_to_elt.children |
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135 if not elements: |
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136 log.warning(f"No element to fasten: {message_elt.toXml()}") |
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137 return None |
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138 history = await self.host.memory.storage.get( |
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139 client, |
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140 History, |
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141 History.origin_id, |
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142 origin_id, |
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143 (History.messages, History.subjects, History.thread) |
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144 ) |
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145 return FastenMetadata( |
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146 elements, |
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147 origin_id, |
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148 history, |
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149 C.bool(apply_to_elt.getAttribute("clear", C.BOOL_FALSE)), |
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150 C.bool(apply_to_elt.getAttribute("shell", C.BOOL_FALSE)), |
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151 ) |
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152 |
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153 |
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154 @implementer(disco.IDisco) |
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155 class XEP_0422_handler(xmlstream.XMPPHandler): |
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156 |
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157 def getDiscoInfo(self, __, target, nodeIdentifier=""): |
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158 return [disco.DiscoFeature(NS_FASTEN)] |
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159 |
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160 def getDiscoItems(self, requestor, target, nodeIdentifier=""): |
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161 return [] |