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annotate plugins/DIGEST-MD5.js @ 64:d9f5ae0b6d98

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Support for DIGEST-MD5 authentication. (plugin)
author Sonny Piers <sonny.piers@gmail.com>
date Wed, 01 Feb 2012 19:47:49 +0100
parents
children 2e8fbf3bce7f
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d9f5ae0b6d98 Support for DIGEST-MD5 authentication. (plugin)
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1 'use strict';
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2
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3 /**
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4 Copyright (c) 2012, Sonny Piers <sonny at fastmail dot net>
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5
d9f5ae0b6d98 Support for DIGEST-MD5 authentication. (plugin)
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6 Permission to use, copy, modify, and/or distribute this software for any
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7 purpose with or without fee is hereby granted, provided that the above
d9f5ae0b6d98 Support for DIGEST-MD5 authentication. (plugin)
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8 copyright notice and this permission notice appear in all copies.
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9
d9f5ae0b6d98 Support for DIGEST-MD5 authentication. (plugin)
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10 THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
d9f5ae0b6d98 Support for DIGEST-MD5 authentication. (plugin)
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11 WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
d9f5ae0b6d98 Support for DIGEST-MD5 authentication. (plugin)
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12 MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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13 ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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14 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
d9f5ae0b6d98 Support for DIGEST-MD5 authentication. (plugin)
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15 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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16 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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17 */
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18
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19 Lightstring.plugins['DIGEST-MD5'] = {
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20 handlers: {
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21 'mechanisms': function (stanza) {
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22 if(stanza.mechanisms.indexOf('DIGEST-MD5') === -1)
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23 return;
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24
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25 this.send(
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26 "<auth xmlns='urn:ietf:params:xml:ns:xmpp-sasl'" +
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27 " mechanism='DIGEST-MD5'/>"
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28 );
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29 },
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30 'success': function (stanza) {
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31 this.send(
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32 "<stream:stream to='" + this.jid.domain + "'" +
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33 " xmlns='jabber:client'" +
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34 " xmlns:stream='http://etherx.jabber.org/streams'" +
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35 " version='1.0'/>"
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36 );
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37 },
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38 'features': function (stanza) {
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39 var that = this;
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40 //TODO check if bind supported
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41 var bind =
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42 "<iq type='set' id='"+Lightstring.newId('sendiq:')+"' xmlns='jabber:client'>" +
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43 "<bind xmlns='urn:ietf:params:xml:ns:xmpp-bind'>" +
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44 (this.jid.resource? "<resource>" + this.jid.resource + "</resource>": "") +
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45 "</bind>" +
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46 "</iq>";
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47 this.send(
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48 bind,
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49 //Success
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50 function(stanza) {
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51 //Session http://xmpp.org/rfcs/rfc3921.html#session
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52 that.jid = new Lightstring.JID(stanza.DOM.textContent);
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53 that.send(
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54 "<iq type='set' id='"+Lightstring.newId('sendiq:')+"' xmlns='jabber:client'>" +
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55 "<session xmlns='urn:ietf:params:xml:ns:xmpp-session'/>" +
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56 "</iq>",
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57 function() {
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58 that.emit('connected');
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59 }
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60 );
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61 },
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62 //Error
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63 function(stanza) {
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64 //TODO: Error?
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65 }
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66 );
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67 },
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68 'challenge': function (stanza) {
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69 //FIXME this is mostly Strophe code
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70
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71 function _quote(str) {
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72 return '"' + str.replace(/\\/g, '\\\\').replace(/"/g, '\\"') + '"';
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73 };
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74
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75 var challenge = atob(stanza.DOM.textContent);
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76
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77 var attribMatch = /([a-z]+)=("[^"]+"|[^,"]+)(?:,|$)/;
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78
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79 var cnonce = MD5.hexdigest(Math.random() * 1234567890);
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80 var realm = '';
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81 var host = null;
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82 var nonce = '';
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83 var qop = '';
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84 var matches;
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85
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86 while (challenge.match(attribMatch)) {
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87 matches = challenge.match(attribMatch);
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88 challenge = challenge.replace(matches[0], '');
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89 matches[2] = matches[2].replace(/^"(.+)"$/, '$1');
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90 switch (matches[1]) {
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91 case 'realm':
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92 realm = matches[2];
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93 break;
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94 case 'nonce':
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95 nonce = matches[2];
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96 break;
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97 case 'qop':
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98 qop = matches[2];
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99 break;
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100 case 'host':
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101 host = matches[2];
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102 break;
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103 }
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104 }
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105
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106 var digest_uri = 'xmpp/' + this.jid.domain;
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107 if (host !== null)
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108 digest_uri = digest_uri + '/' + host;
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109 var A1 = MD5.hash(this.jid.node +
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110 ':' + realm + ':' + this.password) +
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111 ':' + nonce + ':' + cnonce;
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112 var A2 = 'AUTHENTICATE:' + digest_uri;
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113
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114 var responseText = '';
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115 responseText += 'username=' + _quote(this.jid.node) + ',';
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116 responseText += 'realm=' + _quote(realm) + ',';
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117 responseText += 'nonce=' + _quote(nonce) + ',';
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118 responseText += 'cnonce=' + _quote(cnonce) + ',';
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119 responseText += 'nc="00000001",';
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120 responseText += 'qop="auth",';
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121 responseText += 'digest-uri=' + _quote(digest_uri) + ',';
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122 responseText += 'response=' + _quote(
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123 MD5.hexdigest(MD5.hexdigest(A1) + ':' +
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124 nonce + ':00000001:' +
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125 cnonce + ':auth:' +
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126 MD5.hexdigest(A2))) + ',';
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127 responseText += 'charset="utf-8"';
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128 this.send(
d9f5ae0b6d98 Support for DIGEST-MD5 authentication. (plugin)
Sonny Piers <sonny.piers@gmail.com>
parents:
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129 "<response xmlns='urn:ietf:params:xml:ns:xmpp-sasl'>" +
d9f5ae0b6d98 Support for DIGEST-MD5 authentication. (plugin)
Sonny Piers <sonny.piers@gmail.com>
parents:
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130 btoa(responseText) +
d9f5ae0b6d98 Support for DIGEST-MD5 authentication. (plugin)
Sonny Piers <sonny.piers@gmail.com>
parents:
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131 "</response>");
d9f5ae0b6d98 Support for DIGEST-MD5 authentication. (plugin)
Sonny Piers <sonny.piers@gmail.com>
parents:
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132 },
d9f5ae0b6d98 Support for DIGEST-MD5 authentication. (plugin)
Sonny Piers <sonny.piers@gmail.com>
parents:
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133 'failure': function (stanza) {
d9f5ae0b6d98 Support for DIGEST-MD5 authentication. (plugin)
Sonny Piers <sonny.piers@gmail.com>
parents:
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134 //TODO: throw an error?
d9f5ae0b6d98 Support for DIGEST-MD5 authentication. (plugin)
Sonny Piers <sonny.piers@gmail.com>
parents:
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135 }
d9f5ae0b6d98 Support for DIGEST-MD5 authentication. (plugin)
Sonny Piers <sonny.piers@gmail.com>
parents:
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136 }
d9f5ae0b6d98 Support for DIGEST-MD5 authentication. (plugin)
Sonny Piers <sonny.piers@gmail.com>
parents:
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137 };