Mercurial > libervia-backend
annotate sat/core/patches.py @ 3431:5d7569378914
doc (testing): typos
author | Goffi <goffi@goffi.org> |
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date | Fri, 04 Dec 2020 12:27:38 +0100 |
parents | 691283719bb2 |
children | 524856bd7b19 |
rev | line source |
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1 import copy |
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2 from twisted.words.protocols.jabber import xmlstream, sasl, client as tclient, jid |
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3 from wokkel import client |
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4 from sat.core.constants import Const as C |
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5 from sat.core.log import getLogger |
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6 |
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7 log = getLogger(__name__) |
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8 |
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9 """This module applies monkey patches to Twisted and Wokkel |
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10 First part handle certificate validation during XMPP connectionand are temporary |
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11 (until merged upstream). |
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12 Second part add a trigger point to send and onElement method of XmlStream |
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13 """ |
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14 |
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15 |
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16 ## certificate validation patches |
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17 |
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18 |
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19 class XMPPClient(client.XMPPClient): |
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20 |
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21 def __init__(self, jid, password, host=None, port=5222, |
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22 tls_required=True, configurationForTLS=None): |
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23 self.jid = jid |
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24 self.domain = jid.host.encode('idna') |
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25 self.host = host |
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26 self.port = port |
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27 |
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28 factory = HybridClientFactory( |
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29 jid, password, tls_required=tls_required, |
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30 configurationForTLS=configurationForTLS) |
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31 |
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32 client.StreamManager.__init__(self, factory) |
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33 |
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34 |
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35 def HybridClientFactory(jid, password, tls_required=True, configurationForTLS=None): |
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36 a = HybridAuthenticator(jid, password, tls_required, configurationForTLS) |
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37 |
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38 return xmlstream.XmlStreamFactory(a) |
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39 |
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40 |
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41 class HybridAuthenticator(client.HybridAuthenticator): |
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42 res_binding = True |
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43 |
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44 def __init__(self, jid, password, tls_required=True, configurationForTLS=None): |
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45 xmlstream.ConnectAuthenticator.__init__(self, jid.host) |
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46 self.jid = jid |
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47 self.password = password |
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48 self.tls_required = tls_required |
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49 self.configurationForTLS = configurationForTLS |
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50 |
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51 def associateWithStream(self, xs): |
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52 xmlstream.ConnectAuthenticator.associateWithStream(self, xs) |
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53 |
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54 tlsInit = xmlstream.TLSInitiatingInitializer( |
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55 xs, required=self.tls_required, configurationForTLS=self.configurationForTLS) |
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56 xs.initializers = [client.client.CheckVersionInitializer(xs), |
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57 tlsInit, |
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58 CheckAuthInitializer(xs, self.res_binding)] |
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59 |
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60 |
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61 # XmlStream triggers |
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62 |
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63 |
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64 class XmlStream(xmlstream.XmlStream): |
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65 """XmlStream which allows to add hooks""" |
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66 |
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67 def __init__(self, authenticator): |
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68 xmlstream.XmlStream.__init__(self, authenticator) |
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69 # hooks at this level should not modify content |
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70 # so it's not needed to handle priority as with triggers |
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71 self._onElementHooks = [] |
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72 self._sendHooks = [] |
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73 |
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74 def addHook(self, hook_type, callback): |
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75 """Add a send or receive hook""" |
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76 conflict_msg = f"Hook conflict: can't add {hook_type} hook {callback}" |
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77 if hook_type == C.STREAM_HOOK_RECEIVE: |
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78 if callback not in self._onElementHooks: |
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79 self._onElementHooks.append(callback) |
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80 else: |
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81 log.warning(conflict_msg) |
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82 elif hook_type == C.STREAM_HOOK_SEND: |
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83 if callback not in self._sendHooks: |
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84 self._sendHooks.append(callback) |
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85 else: |
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86 log.warning(conflict_msg) |
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87 else: |
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88 raise ValueError(f"Invalid hook type: {hook_type}") |
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89 |
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90 def onElement(self, element): |
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91 for hook in self._onElementHooks: |
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92 hook(element) |
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93 xmlstream.XmlStream.onElement(self, element) |
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94 |
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95 def send(self, obj): |
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96 for hook in self._sendHooks: |
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97 hook(obj) |
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98 xmlstream.XmlStream.send(self, obj) |
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99 |
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100 |
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101 # Binding activation (needed for stream management, XEP-0198) |
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102 |
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103 |
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104 class CheckAuthInitializer(client.CheckAuthInitializer): |
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105 |
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106 def __init__(self, xs, res_binding): |
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107 super(CheckAuthInitializer, self).__init__(xs) |
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108 self.res_binding = res_binding |
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109 |
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110 def initialize(self): |
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111 # XXX: modification of client.CheckAuthInitializer which has optional |
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112 # resource binding, and which doesn't do deprecated |
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113 # SessionInitializer |
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114 if (sasl.NS_XMPP_SASL, 'mechanisms') in self.xmlstream.features: |
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115 inits = [(sasl.SASLInitiatingInitializer, True)] |
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116 if self.res_binding: |
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117 inits.append((tclient.BindInitializer, True)), |
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118 |
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119 for initClass, required in inits: |
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120 init = initClass(self.xmlstream) |
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121 init.required = required |
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122 self.xmlstream.initializers.append(init) |
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123 elif (tclient.NS_IQ_AUTH_FEATURE, 'auth') in self.xmlstream.features: |
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124 self.xmlstream.initializers.append( |
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125 tclient.IQAuthInitializer(self.xmlstream)) |
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126 else: |
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127 raise Exception("No available authentication method found") |
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128 |
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129 |
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130 # jid fix |
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131 |
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132 def internJID(jidstring): |
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133 """ |
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134 Return interned JID. |
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135 |
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136 @rtype: L{JID} |
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137 """ |
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138 # XXX: this interJID return a copy of the cached jid |
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139 # this avoid modification of cached jid as JID is mutable |
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140 # TODO: propose this upstream |
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141 |
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142 if jidstring in jid.__internJIDs: |
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143 return copy.copy(jid.__internJIDs[jidstring]) |
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144 else: |
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145 j = jid.JID(jidstring) |
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146 jid.__internJIDs[jidstring] = j |
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147 return copy.copy(j) |
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148 |
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149 |
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150 def apply(): |
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151 # certificate validation |
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152 client.XMPPClient = XMPPClient |
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153 # XmlStream triggers |
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154 xmlstream.XmlStreamFactory.protocol = XmlStream |
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155 # jid fix |
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156 jid.internJID = internJID |