Mercurial > libervia-backend
annotate sat/core/patches.py @ 2698:5060cbeec01e
core: minor style/typos fixes
author | Goffi <goffi@goffi.org> |
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date | Sat, 01 Dec 2018 10:04:17 +0100 |
parents | 1ecceac3df96 |
children | 00d905e1b0ef |
rev | line source |
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1 from twisted.words.protocols.jabber import xmlstream, sasl, client as tclient |
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2 from twisted.internet import ssl |
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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 apply 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 class TLSInitiatingInitializer(xmlstream.TLSInitiatingInitializer): |
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19 check_certificate = True |
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20 |
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21 def onProceed(self, obj): |
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22 self.xmlstream.removeObserver('/failure', self.onFailure) |
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23 trustRoot = ssl.platformTrust() if self.check_certificate else None |
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24 ctx = ssl.CertificateOptions(trustRoot=trustRoot) |
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25 self.xmlstream.transport.startTLS(ctx) |
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26 self.xmlstream.reset() |
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27 self.xmlstream.sendHeader() |
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28 self._deferred.callback(xmlstream.Reset) |
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29 |
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30 |
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31 class XMPPClient(client.XMPPClient): |
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32 |
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33 def __init__(self, jid, password, host=None, port=5222, |
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34 check_certificate=True): |
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35 self.jid = jid |
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36 self.domain = jid.host.encode('idna') |
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37 self.host = host |
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38 self.port = port |
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39 |
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40 factory = HybridClientFactory( |
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41 jid, password, check_certificate=check_certificate) |
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42 |
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43 client.StreamManager.__init__(self, factory) |
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44 |
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45 |
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46 def HybridClientFactory(jid, password, check_certificate=True): |
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47 a = HybridAuthenticator(jid, password, check_certificate) |
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48 |
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49 return xmlstream.XmlStreamFactory(a) |
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50 |
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51 |
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52 class HybridAuthenticator(client.HybridAuthenticator): |
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53 res_binding = True |
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54 |
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55 def __init__(self, jid, password, check_certificate): |
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56 xmlstream.ConnectAuthenticator.__init__(self, jid.host) |
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57 self.jid = jid |
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58 self.password = password |
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59 self.check_certificate = check_certificate |
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60 |
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61 def associateWithStream(self, xs): |
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62 xmlstream.ConnectAuthenticator.associateWithStream(self, xs) |
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63 |
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64 tlsInit = xmlstream.TLSInitiatingInitializer(xs) |
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65 tlsInit.check_certificate = self.check_certificate |
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66 xs.initializers = [client.client.CheckVersionInitializer(xs), |
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67 tlsInit, |
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68 CheckAuthInitializer(xs, self.res_binding)] |
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69 |
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70 |
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71 # XmlStream triggers |
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72 |
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73 |
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74 class XmlStream(xmlstream.XmlStream): |
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75 """XmlStream which allows to add hooks""" |
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76 |
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77 def __init__(self, authenticator): |
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78 xmlstream.XmlStream.__init__(self, authenticator) |
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79 # hooks at this level should not modify content |
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80 # so it's not needed to handle priority as with triggers |
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81 self._onElementHooks = [] |
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82 self._sendHooks = [] |
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83 |
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84 def addHook(self, hook_type, callback): |
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85 """Add a send or receive hook""" |
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86 conflict_msg = (u"Hook conflict: can't add {hook_type} hook {callback}" |
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87 .format(hook_type=hook_type, callback=callback)) |
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88 if hook_type == C.STREAM_HOOK_RECEIVE: |
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89 if callback not in self._onElementHooks: |
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90 self._onElementHooks.append(callback) |
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91 else: |
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92 log.warning(conflict_msg) |
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93 elif hook_type == C.STREAM_HOOK_SEND: |
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94 if callback not in self._sendHooks: |
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95 self._sendHooks.append(callback) |
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96 else: |
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97 log.warning(conflict_msg) |
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98 else: |
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99 raise ValueError(u"Invalid hook type: {hook_type}" |
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100 .format(hook_type=hook_type)) |
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101 |
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102 def onElement(self, element): |
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103 for hook in self._onElementHooks: |
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104 hook(element) |
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105 xmlstream.XmlStream.onElement(self, element) |
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106 |
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107 def send(self, obj): |
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108 for hook in self._sendHooks: |
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109 hook(obj) |
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110 xmlstream.XmlStream.send(self, obj) |
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111 |
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112 |
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113 # Binding activation (needed for stream management, XEP-0198) |
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114 |
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115 |
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116 class CheckAuthInitializer(client.CheckAuthInitializer): |
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117 |
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118 def __init__(self, xs, res_binding): |
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119 super(CheckAuthInitializer, self).__init__(xs) |
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120 self.res_binding = res_binding |
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121 |
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122 def initialize(self): |
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123 # XXX: modification of client.CheckAuthInitializer which has optional |
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124 # resource binding, and which doesn't do deprecated |
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125 # SessionInitializer |
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126 if (sasl.NS_XMPP_SASL, 'mechanisms') in self.xmlstream.features: |
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127 inits = [(sasl.SASLInitiatingInitializer, True)] |
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128 if self.res_binding: |
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129 inits.append((tclient.BindInitializer, True)), |
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130 |
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131 for initClass, required in inits: |
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132 init = initClass(self.xmlstream) |
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133 init.required = required |
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134 self.xmlstream.initializers.append(init) |
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135 elif (tclient.NS_IQ_AUTH_FEATURE, 'auth') in self.xmlstream.features: |
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136 self.xmlstream.initializers.append( |
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137 tclient.IQAuthInitializer(self.xmlstream)) |
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138 else: |
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139 raise Exception("No available authentication method found") |
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140 |
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141 |
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142 def apply(): |
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143 # certificate validation |
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144 xmlstream.TLSInitiatingInitializer = TLSInitiatingInitializer |
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145 client.XMPPClient = XMPPClient |
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146 # XmlStream triggers |
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147 xmlstream.XmlStreamFactory.protocol = XmlStream |