prosody
c8ad387aab1c
util/sasl.lua

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util/sasl.lua @ 7331:c8ad387aab1c

mod_presence, mod_roster: Move responsibility for sending presence on roster removal to mod_presence
author Kim Alvefur <zash@zash.se>
date Mon, 04 Apr 2016 17:15:10 +0200
parent 6777:5de6b93d0190
child 8382:e5d00bf4a4d5
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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2c0b9e3c11c3 0.3->0.4
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1 -- sasl.lua v0.4
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2 -- Copyright (C) 2008-2010 Tobias Markmann
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3 --
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4 -- All rights reserved.
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5 --
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6 -- Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
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7 --
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8 -- * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
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9 -- * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
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10 -- * Neither the name of Tobias Markmann nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
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11 --
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12 -- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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13
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14
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15 local pairs, ipairs = pairs, ipairs;
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16 local t_insert = table.insert;
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17 local type = type
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18 local setmetatable = setmetatable;
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19 local assert = assert;
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20 local require = require;
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21
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22 local _ENV = nil;
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23
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24 --[[
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25 Authentication Backend Prototypes:
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26
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27 state = false : disabled
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28 state = true : enabled
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29 state = nil : non-existant
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30
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31 Channel Binding:
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32
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33 To enable support of channel binding in some mechanisms you need to provide appropriate callbacks in a table
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34 at profile.cb.
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35
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36 Example:
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37 profile.cb["tls-unique"] = function(self)
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38 return self.user
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39 end
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40
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41 ]]
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42
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43 local method = {};
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44 method.__index = method;
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45 local mechanisms = {};
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46 local backend_mechanism = {};
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47 local mechanism_channelbindings = {};
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48
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49 -- register a new SASL mechanims
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50 local function registerMechanism(name, backends, f, cb_backends)
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51 assert(type(name) == "string", "Parameter name MUST be a string.");
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52 assert(type(backends) == "string" or type(backends) == "table", "Parameter backends MUST be either a string or a table.");
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53 assert(type(f) == "function", "Parameter f MUST be a function.");
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54 if cb_backends then assert(type(cb_backends) == "table"); end
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55 mechanisms[name] = f
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56 if cb_backends then
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57 mechanism_channelbindings[name] = {};
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58 for _, cb_name in ipairs(cb_backends) do
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59 mechanism_channelbindings[name][cb_name] = true;
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60 end
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61 end
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62 for _, backend_name in ipairs(backends) do
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63 if backend_mechanism[backend_name] == nil then backend_mechanism[backend_name] = {}; end
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64 t_insert(backend_mechanism[backend_name], name);
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65 end
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66 end
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67
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68 -- create a new SASL object which can be used to authenticate clients
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69 local function new(realm, profile)
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70 local mechanisms = profile.mechanisms;
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71 if not mechanisms then
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72 mechanisms = {};
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73 for backend, f in pairs(profile) do
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74 if backend_mechanism[backend] then
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75 for _, mechanism in ipairs(backend_mechanism[backend]) do
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76 mechanisms[mechanism] = true;
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77 end
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78 end
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79 end
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80 profile.mechanisms = mechanisms;
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81 end
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82 return setmetatable({ profile = profile, realm = realm, mechs = mechanisms }, method);
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83 end
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84
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85 -- add a channel binding handler
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86 function method:add_cb_handler(name, f)
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87 if type(self.profile.cb) ~= "table" then
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88 self.profile.cb = {};
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89 end
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90 self.profile.cb[name] = f;
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91 return self;
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92 end
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93
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94 -- get a fresh clone with the same realm and profile
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95 function method:clean_clone()
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96 return new(self.realm, self.profile)
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97 end
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98
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99 -- get a list of possible SASL mechanims to use
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100 function method:mechanisms()
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101 local current_mechs = {};
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102 for mech, _ in pairs(self.mechs) do
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103 if mechanism_channelbindings[mech] then
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104 if self.profile.cb then
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105 local ok = false;
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106 for cb_name, _ in pairs(self.profile.cb) do
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107 if mechanism_channelbindings[mech][cb_name] then
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108 ok = true;
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109 end
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110 end
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111 if ok == true then current_mechs[mech] = true; end
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112 end
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113 else
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114 current_mechs[mech] = true;
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115 end
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116 end
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117 return current_mechs;
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118 end
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119
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120 -- select a mechanism to use
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121 function method:select(mechanism)
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122 if not self.selected and self.mechs[mechanism] then
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123 self.selected = mechanism;
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124 return true;
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125 end
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Tobias Markmann <tm@ayena.de>
parents: 760
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126 end
b7ea802f3527 Adding inital support for ANONYMOUS mechanism in SASL.
Tobias Markmann <tm@ayena.de>
parents: 760
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127
2176
aaf2b2df61f7 Mostly making the code run; includes fixing typos and so on.
Tobias Markmann <tm@ayena.de>
parents: 2175
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128 -- feed new messages to process into the library
aaf2b2df61f7 Mostly making the code run; includes fixing typos and so on.
Tobias Markmann <tm@ayena.de>
parents: 2175
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129 function method:process(message)
2188
1fd38975addd Add support for plain profile in digest-md5 implementation.
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parents: 2187
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130 --if message == "" or message == nil then return "failure", "malformed-request" end
3550
5e5d136d9de0 util.sasl, util.sasl_cyrus: Mechanism selection cleaned up to be more consistent.
Waqas Hussain <waqas20@gmail.com>
parents: 3549
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131 return mechanisms[self.selected](self, message);
15
c0d754774db2 adding SASL lib with PLAIN support, not tested yet
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parents:
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132 end
799
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parents: 760
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133
2186
1112871916eb Move each mechanism in an own file.
Tobias Markmann <tm@ayena.de>
parents: 2185
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134 -- load the mechanisms
3442
8cfacc41099e util.sasl: Simplified some code a bit.
Waqas Hussain <waqas20@gmail.com>
parents: 3441
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135 require "util.sasl.plain" .init(registerMechanism);
8cfacc41099e util.sasl: Simplified some code a bit.
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parents: 3441
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136 require "util.sasl.digest-md5".init(registerMechanism);
8cfacc41099e util.sasl: Simplified some code a bit.
Waqas Hussain <waqas20@gmail.com>
parents: 3441
diff changeset
137 require "util.sasl.anonymous" .init(registerMechanism);
8cfacc41099e util.sasl: Simplified some code a bit.
Waqas Hussain <waqas20@gmail.com>
parents: 3441
diff changeset
138 require "util.sasl.scram" .init(registerMechanism);
5687
e879b53e9df8 util.sasl.external: Add SASL EXTERNAL mechanism
Kim Alvefur <zash@zash.se>
parents: 4933
diff changeset
139 require "util.sasl.external" .init(registerMechanism);
15
c0d754774db2 adding SASL lib with PLAIN support, not tested yet
Tobias Markmann <tm@ayena.de>
parents:
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140
6777
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6036
diff changeset
141 return {
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6036
diff changeset
142 registerMechanism = registerMechanism;
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6036
diff changeset
143 new = new;
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6036
diff changeset
144 };