Mercurial > libervia-web
annotate src/browser/sat_browser/otrjs_wrapper.py @ 737:398b54bd97f0
browser_side: remove RichMessageEditor and RecipientManager which are not used since the removal of the unibox
author | souliane <souliane@mailoo.org> |
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date | Thu, 19 Nov 2015 12:08:58 +0100 |
parents | 9877607c719a |
children | f8a7a046ff9c |
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1 #!/usr/bin/python |
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2 # -*- coding: utf-8 -*- |
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3 |
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4 # Libervia wrapper for otr.js |
685 | 5 # Copyright (C) 2009, 2010, 2011, 2012, 2013, 2014, 2015 Jérôme Poisson (goffi@goffi.org) |
6 # Copyright (C) 2013, 2014, 2015 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 """This file is a wrapper for otr.js. It partially reproduces the usage |
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22 (modules, classes and attributes names) and behavior of potr, so you |
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23 can easily adapt some code based on potr to Pyjamas applications. |
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24 |
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25 potr is released under the GNU LESSER GENERAL PUBLIC LICENSE Version 3 |
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26 - https://github.com/python-otr/pure-python-otr/blob/master/LICENSE |
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27 |
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28 otr.js is released under the Mozilla Public Licence Version 2.0 |
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29 - https://github.com/arlolra/otr/blob/master/license |
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30 """ |
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31 |
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32 from __pyjamas__ import JS |
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33 |
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34 # should you re-use this class outside SàT, you can import __pyjamas__.console as log instead |
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35 from sat.core.log import getLogger |
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36 log = getLogger(__name__) |
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37 |
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38 |
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39 # XXX: pyjamas can't probably import more than one JS file, it messes the order. |
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40 # XXX: pyjamas needs the file to be in the compilation directory - no submodule. |
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41 # XXX: pyjamas needs the imported file to end with a empty line or semi-column. |
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42 # FIXME: fix these bugs upstream in Pyjamas |
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43 import otr.min.js |
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44 |
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45 |
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46 def isSupported(): |
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47 JS("""return (typeof OTR !== 'undefined');""") |
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48 |
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49 |
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50 if not isSupported(): |
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51 # see https://developer.mozilla.org/en-US/docs/Web/API/window.crypto.getRandomValues#Browser_Compatibility |
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52 log.error('Your browser is not implementing CSPRNG: OTR has been disabled.') |
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53 raise ImportError('CSPRNG is not supported by your browser') |
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54 |
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55 |
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56 class context(object): |
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57 |
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58 # Pre-declare these attributes to avoid the pylint "undefined variable" errors |
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59 STATUS_SEND_QUERY = None |
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60 STATUS_AKE_INIT = None |
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61 STATUS_AKE_SUCCESS = None |
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62 STATUS_END_OTR = None |
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63 STATE_PLAINTEXT = None |
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64 STATE_ENCRYPTED = None |
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65 STATE_FINISHED = None |
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66 OTR_TAG = None |
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67 OTR_VERSION_2 = None |
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68 OTR_VERSION_3 = None |
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69 WHITESPACE_TAG = None |
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70 WHITESPACE_TAG_V2 = None |
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71 WHITESPACE_TAG_V3 = None |
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72 |
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73 JS(""" |
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74 $cls_definition['STATUS_SEND_QUERY'] = OTR.CONST.STATUS_SEND_QUERY; |
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75 $cls_definition['STATUS_AKE_INIT'] = OTR.CONST.STATUS_AKE_INIT; |
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76 $cls_definition['STATUS_AKE_SUCCESS'] = OTR.CONST.STATUS_AKE_SUCCESS; |
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77 $cls_definition['STATUS_END_OTR'] = OTR.CONST.STATUS_END_OTR; |
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78 $cls_definition['STATE_PLAINTEXT'] = OTR.CONST.MSGSTATE_PLAINTEXT; |
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79 $cls_definition['STATE_ENCRYPTED'] = OTR.CONST.MSGSTATE_ENCRYPTED; |
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80 $cls_definition['STATE_FINISHED'] = OTR.CONST.MSGSTATE_FINISHED; |
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81 $cls_definition['OTR_TAG'] = OTR.CONST.OTR_TAG; |
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82 $cls_definition['OTR_VERSION_2'] = OTR.CONST.OTR_VERSION_2; |
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83 $cls_definition['OTR_VERSION_3'] = OTR.CONST.OTR_VERSION_3; |
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84 $cls_definition['WHITESPACE_TAG'] = OTR.CONST.WHITESPACE_TAG; |
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85 $cls_definition['WHITESPACE_TAG_V2'] = OTR.CONST.WHITESPACE_TAG_V2; |
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86 $cls_definition['WHITESPACE_TAG_V3'] = OTR.CONST.WHITESPACE_TAG_V3; |
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87 """) |
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88 |
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89 class UnencryptedMessage(Exception): |
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90 pass |
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91 |
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92 class Context(object): |
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93 |
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94 def __init__(self, account, peername): |
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95 self.user = account |
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96 self.peer = peername |
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97 self.trustName = self.peer |
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98 options = {'fragment_size': 140, |
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99 'send_interval': 200, |
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100 'priv': account.getPrivkey(), # this would generate the account key if it hasn't been done yet |
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101 'debug': False, |
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102 } |
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103 JS("""self.otr = new OTR(options);""") |
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104 |
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105 for policy in ('ALLOW_V2', 'ALLOW_V3', 'REQUIRE_ENCRYPTION'): |
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106 setattr(self.otr, policy, self.getPolicy(policy)) |
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107 |
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108 self.otr.on('ui', self.receiveMessageCb) |
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109 self.otr.on('io', self.sendMessageCb) |
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110 self.otr.on('error', self.messageErrorCb) |
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111 self.otr.on('status', lambda status: self.setStateCb(self.otr.msgstate, status)) |
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112 self.otr.on('smp', self.smpAuthCb) |
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113 |
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114 @property |
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115 def state(self): |
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116 return self.otr.msgstate |
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117 |
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118 @state.setter |
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119 def state(self, state): |
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120 self.otr.msgstate = state |
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121 |
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122 def getCurrentKey(self): |
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123 return self.otr.their_priv_pk |
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124 |
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125 def setTrust(self, fingerprint, trustLevel): |
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126 self.user.setTrust(self.trustName, fingerprint, trustLevel) |
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127 |
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128 def setCurrentTrust(self, trustLevel): |
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129 self.setTrust(self.otr.their_priv_pk.fingerprint(), trustLevel) |
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130 |
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131 def getTrust(self, fingerprint, default=None): |
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132 return self.user.getTrust(self.trustName, fingerprint, default) |
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133 |
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134 def getCurrentTrust(self): |
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135 # XXX: the docstring of potr for the return value of this method is incorrect |
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136 if self.otr.their_priv_pk is None: |
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137 return None |
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138 return self.getTrust(self.otr.their_priv_pk.fingerprint(), None) |
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139 |
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140 def getUsedVersion(self): |
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141 """Return the otr version that is beeing used""" |
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142 # this method doesn't exist in potr, it has been added for convenience |
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143 try: |
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144 return self.otr.ake.otr_version |
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145 except AttributeError: |
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146 return None |
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147 |
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148 def disconnect(self): |
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149 self.otr.endOtr() |
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150 |
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151 def finish(self): |
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152 """Finish the session - avoid to send any message and the user has to manually disconnect""" |
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153 # it means TLV of type 1 (two first bytes), message length 0 (2 last bytes) |
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154 self.otr.handleTLVs('\x00\x01\x00\x00') |
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155 |
522
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156 def receiveMessage(self, msg): |
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157 """Received a message, ask otr.js to (try to) decrypt it""" |
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158 self.otr.receiveMsg(msg) |
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159 |
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160 def sendMessage(self, msg): |
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161 """Ask otr.js to encrypt a message for sending""" |
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162 self.otr.sendMsg(msg) |
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163 |
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164 def sendQueryMessage(self): |
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165 """Start or refresh an encryption communication""" |
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166 # otr.js offers this method, with potr you have to build the query message yourself |
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167 self.otr.sendQueryMsg() |
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168 |
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169 def inject(self, msg, appdata=None): |
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170 return self.sendMessageCb(msg, appdata) |
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171 |
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172 def getPolicy(self, key): |
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173 raise NotImplementedError |
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174 |
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175 def smpAuthSecret(self, secret, question=None): |
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176 return self.otr.smpSecret(secret, question) |
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177 |
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178 def smpAuthAbort(self, act=None): |
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179 # XXX: dirty hack to let the triggered method know who aborted the |
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180 # authentication. We need it to display the proper feedback and, |
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181 # if the correspondent aborted, set the conversation 'unverified'. |
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182 self.otr.sm.init() |
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183 JS("""self.otr.sm.sendMsg(OTR.HLP.packTLV(6, ''))""") |
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184 self.smpAuthCb('abort', '', act) |
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185 |
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186 def sendMessageCb(self, msg, meta): |
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187 """Actually send the message after it's been encrypted""" |
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188 raise NotImplementedError |
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189 |
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190 def receiveMessageCb(self, msg, encrypted): |
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191 """Display the message after it's been eventually decrypted""" |
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192 raise NotImplementedError |
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193 |
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194 def messageErrorCb(self, error): |
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195 """Message error callback""" |
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196 raise NotImplementedError |
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197 |
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198 def setStateCb(self, newstate): |
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199 raise NotImplementedError |
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200 |
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201 def smpAuthCb(self, newstate): |
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202 raise NotImplementedError |
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203 |
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204 class Account(object): |
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205 |
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206 def __init__(self, host): |
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207 self.host = host |
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208 self.privkey = None |
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209 self.trusts = {} |
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210 |
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211 def getPrivkey(self): |
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212 # the return value must have a method serializePrivateKey() |
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213 # if the key is not saved yet, call savePrivkey to generate it |
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214 if self.privkey is None: |
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215 self.privkey = self.loadPrivkey() |
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216 if self.privkey is None: |
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217 JS("""self.privkey = new DSA();""") |
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218 self.savePrivkey() |
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219 return self.privkey |
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220 |
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221 def setTrust(self, key, fingerprint, trustLevel): |
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222 if key not in self.trusts: |
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223 self.trusts[key] = {} |
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224 self.trusts[key][fingerprint] = trustLevel |
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225 self.saveTrusts() |
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226 |
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227 def getTrust(self, key, fingerprint, default=None): |
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228 if key not in self.trusts: |
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229 return default |
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230 return self.trusts[key].get(fingerprint, default) |
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231 |
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232 def loadPrivkey(self): |
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233 raise NotImplementedError |
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234 |
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235 def savePrivkey(self): |
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236 raise NotImplementedError |
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237 |
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238 def saveTrusts(self): |
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239 raise NotImplementedError |
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240 |
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241 |
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242 class crypt(object): |
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243 |
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244 class PK(object): |
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245 |
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246 def parsePrivateKey(self, key): |
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247 JS("""return DSA.parsePrivate(key);""") |
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248 |
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249 |
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250 class proto(object): |
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251 |
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252 @classmethod |
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253 def checkForOTR(cls, body): |
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254 """Helper method to check if the message contains OTR starting tag or whitespace |
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255 |
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256 @return: |
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257 - context.OTR_TAG if the message starts with it |
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258 - context.WHITESPACE_TAG if the message contains OTR whitespaces |
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259 - None otherwise |
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260 """ |
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261 if body.startswith(context.OTR_TAG): |
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262 return context.OTR_TAG |
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263 index = body.find(context.WHITESPACE_TAG) |
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264 if index < 0: |
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265 return False |
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266 tags = [body[i:i + 8] for i in range(index, len(body), 8)] |
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267 if [True for tag in tags if tag in (context.WHITESPACE_TAG_V2, context.WHITESPACE_TAG_V3)]: |
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268 return context.WHITESPACE_TAG |
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269 return None |
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270 |
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271 |
522
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272 # serialazePrivateKey is the method name in potr |
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273 JS("""DSA.serializePrivateKey = DSA.packPrivate;""") |