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annotate src/browser/sat_browser/otrjs_wrapper.py @ 530:1735aaeac652

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plugin OTR: forces FINISHED state if we are in ENCRYPTED state on contact disconnection
author souliane <souliane@mailoo.org>
date Fri, 05 Sep 2014 11:53:55 +0200
parents 5add182e7dd5
children 1fa173107fde
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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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
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5 # Copyright (C) 2009, 2010, 2011, 2012, 2013, 2014 Jérôme Poisson (goffi@goffi.org)
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6 # Copyright (C) 2013, 2014 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 class context(object):
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47
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48 # Pre-declare these attributes to avoid the pylint "undefined variable" errors
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49 STATUS_SEND_QUERY = None
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50 STATUS_AKE_INIT = None
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51 STATUS_AKE_SUCCESS = None
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52 STATUS_END_OTR = None
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53 STATE_PLAINTEXT = None
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54 STATE_ENCRYPTED = None
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55 STATE_FINISHED = None
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56 OTR_VERSION_2 = None
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57 OTR_VERSION_3 = None
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58
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59 JS("""
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60 $cls_definition['STATUS_SEND_QUERY'] = OTR.CONST.STATUS_SEND_QUERY;
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61 $cls_definition['STATUS_AKE_INIT'] = OTR.CONST.STATUS_AKE_INIT;
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62 $cls_definition['STATUS_AKE_SUCCESS'] = OTR.CONST.STATUS_AKE_SUCCESS;
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63 $cls_definition['STATUS_END_OTR'] = OTR.CONST.STATUS_END_OTR;
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64 $cls_definition['STATE_PLAINTEXT'] = OTR.CONST.MSGSTATE_PLAINTEXT;
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65 $cls_definition['STATE_ENCRYPTED'] = OTR.CONST.MSGSTATE_ENCRYPTED;
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66 $cls_definition['STATE_FINISHED'] = OTR.CONST.MSGSTATE_FINISHED;
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67 $cls_definition['OTR_VERSION_2'] = OTR.CONST.OTR_VERSION_2;
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68 $cls_definition['OTR_VERSION_3'] = OTR.CONST.OTR_VERSION_3;
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69 """)
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70
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71 class UnencryptedMessage(Exception):
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72 pass
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73
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74 class Context(object):
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75
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76 def __init__(self, account, peername):
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77 self.user = account
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78 self.peer = peername
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79 self.trustName = self.peer
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80 options = {'fragment_size': 140,
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81 'send_interval': 200,
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82 'priv': account.getPrivkey(), # this would generate the account key if it hasn't been done yet
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83 'debug': False,
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84 }
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85 JS("""self.otr = new OTR(options);""")
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86
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87 for policy in ('ALLOW_V2', 'ALLOW_V3', 'REQUIRE_ENCRYPTION'):
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88 setattr(self.otr, policy, self.getPolicy(policy))
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89
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90 self.otr.on('ui', self.receiveMessageCb)
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91 self.otr.on('io', self.sendMessageCb)
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92 self.otr.on('error', self.messageErrorCb)
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93 self.otr.on('status', lambda status: self.setStateCb(self.otr.msgstate, status))
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94 self.otr.on('smp', self.smpAuthCb)
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95
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96 @property
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97 def state(self):
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98 return self.otr.msgstate
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99
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100 @state.setter
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101 def state(self, state):
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102 self.otr.msgstate = state
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103
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104 def getCurrentKey(self):
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105 return self.otr.their_priv_pk
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106
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107 def setTrust(self, fingerprint, trustLevel):
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108 self.user.setTrust(self.trustName, fingerprint, trustLevel)
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109
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110 def setCurrentTrust(self, trustLevel):
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111 self.setTrust(self.otr.their_priv_pk.fingerprint(), trustLevel)
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112
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113 def getTrust(self, fingerprint, default=None):
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114 return self.user.getTrust(self.trustName, fingerprint, default)
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115
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116 def getCurrentTrust(self):
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117 # XXX: the docstring of potr for the return value of this method is incorrect
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118 if self.otr.their_priv_pk is None:
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119 return None
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120 return self.getTrust(self.otr.their_priv_pk.fingerprint(), None)
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121
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122 def getUsedVersion(self):
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123 """Return the otr version that is beeing used"""
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124 # this method doesn't exist in potr, it has been added for convenience
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125 try:
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126 return self.otr.ake.otr_version
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127 except AttributeError:
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128 return None
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129
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130 def disconnect(self):
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131 self.otr.endOtr()
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132
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133 def finish(self):
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134 """Finish the session - avoid to send any message and the user has to manually disconnect"""
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135 self.otr.handleTLVs('\x00\x00\x01\x00\x00')
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136
522
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137 def receiveMessage(self, msg):
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138 """Received a message, ask otr.js to (try to) decrypt it"""
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139 self.otr.receiveMsg(msg)
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140
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141 def sendMessage(self, msg):
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142 """Ask otr.js to encrypt a message for sending"""
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souliane <souliane@mailoo.org>
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143 self.otr.sendMsg(msg)
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144
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145 def sendQueryMessage(self):
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146 """Start or refresh an encryption communication"""
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147 # otr.js offers this method, with potr you have to build the query message yourself
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148 self.otr.sendQueryMsg()
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149
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150 def inject(self, msg, appdata=None):
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151 return self.sendMessageCb(msg, appdata)
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152
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153 def getPolicy(self, key):
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154 raise NotImplementedError
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155
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156 def smpAuthSecret(self, secret, question=None):
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157 return self.otr.smpSecret(secret, question)
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158
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159 def smpAuthAbort(self, act=None):
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160 # XXX: dirty hack to let the triggered method know who aborted the
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souliane <souliane@mailoo.org>
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161 # authentication. We need it to display the proper feedback and,
523
5add182e7dd5 browser_side (plugin OTR): rename menus and replace 'buddy' with 'correspondent'
souliane <souliane@mailoo.org>
parents: 522
diff changeset
162 # if the correspondent aborted, set the conversation 'unverified'.
522
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163 self.otr.sm.init()
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164 JS("""self.otr.sm.sendMsg(OTR.HLP.packTLV(6, ''))""")
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165 self.smpAuthCb('abort', '', act)
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166
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167 def sendMessageCb(self, msg, meta):
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168 """Actually send the message after it's been encrypted"""
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169 raise NotImplementedError
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parents:
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170
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parents:
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171 def receiveMessageCb(self, msg, encrypted):
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parents:
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172 """Display the message after it's been eventually decrypted"""
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parents:
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173 raise NotImplementedError
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parents:
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174
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175 def messageErrorCb(self, error):
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parents:
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176 """Message error callback"""
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parents:
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177 raise NotImplementedError
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parents:
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178
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179 def setStateCb(self, newstate):
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180 raise NotImplementedError
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parents:
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181
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parents:
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182 def smpAuthCb(self, newstate):
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183 raise NotImplementedError
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parents:
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184
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parents:
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185 class Account(object):
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186
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parents:
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187 def __init__(self, host):
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188 self.host = host
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189 self.privkey = None
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190 self.trusts = {}
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191
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192 def getPrivkey(self):
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193 # the return value must have a method serializePrivateKey()
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parents:
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194 # if the key is not saved yet, call savePrivkey to generate it
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souliane <souliane@mailoo.org>
parents:
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195 if self.privkey is None:
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parents:
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196 self.privkey = self.loadPrivkey()
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parents:
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197 if self.privkey is None:
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parents:
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198 JS("""self.privkey = new DSA();""")
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souliane <souliane@mailoo.org>
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199 self.savePrivkey()
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parents:
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200 return self.privkey
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parents:
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201
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parents:
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202 def setTrust(self, key, fingerprint, trustLevel):
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203 if key not in self.trusts:
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parents:
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204 self.trusts[key] = {}
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souliane <souliane@mailoo.org>
parents:
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205 self.trusts[key][fingerprint] = trustLevel
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souliane <souliane@mailoo.org>
parents:
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206 self.saveTrusts()
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parents:
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207
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parents:
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208 def getTrust(self, key, fingerprint, default=None):
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parents:
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209 if key not in self.trusts:
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parents:
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210 return default
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parents:
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211 return self.trusts[key].get(fingerprint, default)
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parents:
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212
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parents:
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213 def loadPrivkey(self):
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parents:
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214 raise NotImplementedError
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parents:
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215
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parents:
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216 def savePrivkey(self):
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parents:
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217 raise NotImplementedError
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parents:
diff changeset
218
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parents:
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219 def saveTrusts(self):
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parents:
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220 raise NotImplementedError
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souliane <souliane@mailoo.org>
parents:
diff changeset
221
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parents:
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222
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souliane <souliane@mailoo.org>
parents:
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223 class crypt(object):
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224
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parents:
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225 class PK(object):
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parents:
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226
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souliane <souliane@mailoo.org>
parents:
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227 def parsePrivateKey(self, key):
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souliane <souliane@mailoo.org>
parents:
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228 JS("""return DSA.parsePrivate(key);""")
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parents:
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229
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parents:
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230
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souliane <souliane@mailoo.org>
parents:
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231 # serialazePrivateKey is the method name in potr
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souliane <souliane@mailoo.org>
parents:
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232 JS("""DSA.serializePrivateKey = DSA.packPrivate;""")