prosody
d724289a5226
util/sasl.lua

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util/sasl.lua @ 6208:d724289a5226

plugins/muc: Move password functions to seperate module
author daurnimator <quae@daurnimator.com>
date Wed, 02 Apr 2014 16:57:59 -0400
parent 5863:abcbaf7f2e8e
child 6036:f9e108f7db21
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 module "sasl"
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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 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 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] and self.profile.cb then
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104 local ok = false;
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105 for cb_name, _ in pairs(self.profile.cb) do
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106 if mechanism_channelbindings[mech][cb_name] then
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107 ok = true;
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108 end
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109 end
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110 if ok == true then current_mechs[mech] = true; end
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111 else
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112 current_mechs[mech] = true;
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113 end
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114 end
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115 return current_mechs;
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116 end
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117
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118 -- select a mechanism to use
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119 function method:select(mechanism)
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120 if not self.selected and self.mechs[mechanism] then
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121 self.selected = mechanism;
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122 return true;
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123 end
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124 end
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125
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126 -- feed new messages to process into the library
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127 function method:process(message)
2188
1fd38975addd Add support for plain profile in digest-md5 implementation.
Tobias Markmann <tm@ayena.de>
parents: 2187
diff changeset
128 --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
diff changeset
129 return mechanisms[self.selected](self, message);
15
c0d754774db2 adding SASL lib with PLAIN support, not tested yet
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
130 end
799
b7ea802f3527 Adding inital support for ANONYMOUS mechanism in SASL.
Tobias Markmann <tm@ayena.de>
parents: 760
diff changeset
131
2186
1112871916eb Move each mechanism in an own file.
Tobias Markmann <tm@ayena.de>
parents: 2185
diff changeset
132 -- load the mechanisms
3442
8cfacc41099e util.sasl: Simplified some code a bit.
Waqas Hussain <waqas20@gmail.com>
parents: 3441
diff changeset
133 require "util.sasl.plain" .init(registerMechanism);
8cfacc41099e util.sasl: Simplified some code a bit.
Waqas Hussain <waqas20@gmail.com>
parents: 3441
diff changeset
134 require "util.sasl.digest-md5".init(registerMechanism);
8cfacc41099e util.sasl: Simplified some code a bit.
Waqas Hussain <waqas20@gmail.com>
parents: 3441
diff changeset
135 require "util.sasl.anonymous" .init(registerMechanism);
8cfacc41099e util.sasl: Simplified some code a bit.
Waqas Hussain <waqas20@gmail.com>
parents: 3441
diff changeset
136 require "util.sasl.scram" .init(registerMechanism);
5687
e879b53e9df8 util.sasl.external: Add SASL EXTERNAL mechanism
Kim Alvefur <zash@zash.se>
parents: 4933
diff changeset
137 require "util.sasl.external" .init(registerMechanism);
15
c0d754774db2 adding SASL lib with PLAIN support, not tested yet
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
138
519
cccd610a0ef9 Insert copyright/license headers
Matthew Wild <mwild1@gmail.com>
parents: 508
diff changeset
139 return _M;