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annotate sat/plugins/plugin_xep_0020.py @ 2738:eb58f26ed236

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plugin XEP-0384: update to last python-omemo + trust management: - Plugin has been updated to use last version of python-omemo (10.0.3). - A temporary method remove all storage data if they are found, this method must be removed before 0.7 release (only people using dev version should have old omemo data in there storage). - Trust management is not implemented, using new encryptionTrustUIGet method (an UI is also displayed when trust handling is needed before sending a message). - omemo.DefaultOTPKPolicy is now used, instead of previous test policy of always deleting. OMEMO e2e encryption is now functional for one2one conversations, including fingerprint management.
author Goffi <goffi@goffi.org>
date Wed, 02 Jan 2019 18:50:28 +0100
parents 56f94936df1e
children 003b8b4b56a7
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1 #!/usr/bin/env python2
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2 # -*- coding: utf-8 -*-
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3
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4 # SAT plugin for managing xep-0020
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5 # Copyright (C) 2009-2018 Jérôme Poisson (goffi@goffi.org)
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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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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 sat.core import exceptions
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26 from twisted.words.xish import domish
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27
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28 from zope.interface import implements
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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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34
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35 from wokkel import disco, iwokkel, data_form
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36
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37 NS_FEATURE_NEG = "http://jabber.org/protocol/feature-neg"
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38
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39 PLUGIN_INFO = {
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40 C.PI_NAME: "XEP 0020 Plugin",
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41 C.PI_IMPORT_NAME: "XEP-0020",
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42 C.PI_TYPE: "XEP",
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43 C.PI_PROTOCOLS: ["XEP-0020"],
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44 C.PI_MAIN: "XEP_0020",
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45 C.PI_HANDLER: "yes",
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46 C.PI_DESCRIPTION: _("""Implementation of Feature Negotiation"""),
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47 }
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49
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50 class XEP_0020(object):
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51 def __init__(self, host):
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52 log.info(_("Plugin XEP_0020 initialization"))
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53
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54 def getHandler(self, client):
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55 return XEP_0020_handler()
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56
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57 def getFeatureElt(self, elt):
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58 """Check element's children to find feature elements
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59
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60 @param elt(domish.Element): parent element of the feature element
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61 @return: feature elements
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62 @raise exceptions.NotFound: no feature element found
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63 """
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64 try:
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65 feature_elt = elt.elements(NS_FEATURE_NEG, "feature").next()
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66 except StopIteration:
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67 raise exceptions.NotFound
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68 return feature_elt
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70 def _getForm(self, elt, namespace):
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71 """Return the first child data form
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72
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73 @param elt(domish.Element): parent of the data form
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74 @param namespace (None, unicode): form namespace or None to ignore
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75 @return (None, data_form.Form): data form or None is nothing is found
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76 """
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77 if namespace is None:
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78 try:
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79 form_elt = elt.elements(data_form.NS_X_DATA).next()
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80 except StopIteration:
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81 return None
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82 else:
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83 return data_form.Form.fromElement(form_elt)
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84 else:
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85 return data_form.findForm(elt, namespace)
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86
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87 def getChoosedOptions(self, feature_elt, namespace):
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88 """Return choosed feature for feature element
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90 @param feature_elt(domish.Element): feature domish element
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91 @param namespace (None, unicode): form namespace or None to ignore
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92 @return (dict): feature name as key, and choosed option as value
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93 @raise exceptions.NotFound: not data form is found
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94 """
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95 form = self._getForm(feature_elt, namespace)
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96 if form is None:
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97 raise exceptions.NotFound
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98 result = {}
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99 for field in form.fields:
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100 values = form.fields[field].values
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101 result[field] = values[0] if values else None
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102 if len(values) > 1:
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103 log.warning(
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104 _(
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105 u"More than one value choosed for {}, keeping the first one"
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106 ).format(field)
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107 )
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108 return result
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109
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110 def negotiate(self, feature_elt, name, negotiable_values, namespace):
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111 """Negotiate the feature options
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112
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113 @param feature_elt(domish.Element): feature element
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114 @param name: the option name (i.e. field's var attribute) to negotiate
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115 @param negotiable_values(iterable): acceptable values for this negotiation
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116 first corresponding value will be returned
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Goffi <goffi@goffi.org>
parents: 1409
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117 @param namespace (None, unicode): form namespace or None to ignore
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parents: 1409
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118 @raise KeyError: name is not found in data form fields
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parents: 1409
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119 """
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Goffi <goffi@goffi.org>
parents: 1409
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120 form = self._getForm(feature_elt, namespace)
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parents: 1409
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121 options = [option.value for option in form.fields[name].options]
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Goffi <goffi@goffi.org>
parents: 1409
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122 for value in negotiable_values:
383
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parents:
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123 if value in options:
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124 return value
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125 return None
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126
1577
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Goffi <goffi@goffi.org>
parents: 1409
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127 def chooseOption(self, options, namespace):
383
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128 """Build a feature element with choosed options
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parents: 1409
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129
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parents: 1409
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130 @param options(dict): dict with feature as key and choosed option as value
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parents: 1409
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131 @param namespace (None, unicode): form namespace or None to ignore
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parents: 1409
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132 """
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133 feature_elt = domish.Element((NS_FEATURE_NEG, "feature"))
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parents: 2562
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134 x_form = data_form.Form("submit", formNamespace=namespace)
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parents: 1409
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135 x_form.makeFields(options)
383
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136 feature_elt.addChild(x_form.toElement())
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137 return feature_elt
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138
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139 def proposeFeatures(self, options_dict, namespace):
383
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140 """Build a feature element with options to propose
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141
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parents: 1409
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142 @param options_dict(dict): dict with feature as key and iterable of acceptable options as value
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parents: 1409
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143 @param namespace(None, unicode): feature namespace
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parents: 1409
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144 """
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145 feature_elt = domish.Element((NS_FEATURE_NEG, "feature"))
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parents: 2562
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146 x_form = data_form.Form("form", formNamespace=namespace)
383
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147 for field in options_dict:
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148 x_form.addField(
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149 data_form.Field(
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150 "list-single",
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151 field,
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152 options=[data_form.Option(option) for option in options_dict[field]],
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153 )
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154 )
383
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155 feature_elt.addChild(x_form.toElement())
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156 return feature_elt
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157
594
e629371a28d3 Fix pep8 support in src/plugins.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 588
diff changeset
158
383
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159 class XEP_0020_handler(XMPPHandler):
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160 implements(iwokkel.IDisco)
587
952322b1d490 Remove trailing whitespaces.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 572
diff changeset
161
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parents: 2562
diff changeset
162 def getDiscoInfo(self, requestor, target, nodeIdentifier=""):
383
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163 return [disco.DiscoFeature(NS_FEATURE_NEG)]
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164
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165 def getDiscoItems(self, requestor, target, nodeIdentifier=""):
383
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166 return []