prosody
cdcfd93e2f43
util/sasl.lua

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util/sasl.lua @ 5851:cdcfd93e2f43

mod_pubsub, util.pubsub: Keep track of the order of items
author Kim Alvefur <zash@zash.se>
date Fri, 04 Oct 2013 16:40:27 +0200
parent 5843:fb6573e191cf
child 5862:7e83c8448cd6
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 local print = print
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22
38
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23 module "sasl"
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24
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25 --[[
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26 Authentication Backend Prototypes:
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27
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28 state = false : disabled
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29 state = true : enabled
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30 state = nil : non-existant
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31
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32 Channel Binding:
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33
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34 To enable support of channel binding in some mechanisms you need to provide appropriate callbacks in a table
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35 at profile.cb.
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36
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37 Example:
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38 profile.cb["tls-unique"] = function(self)
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39 return self.user
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40 end
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41
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42 ]]
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43
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44 local method = {};
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45 method.__index = method;
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46 local mechanisms = {};
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47 local backend_mechanism = {};
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48 local mechanism_channelbindings = {};
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49
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50 -- register a new SASL mechanims
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51 local function registerMechanism(name, backends, f, cb_backends)
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52 assert(type(name) == "string", "Parameter name MUST be a string.");
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53 assert(type(backends) == "string" or type(backends) == "table", "Parameter backends MUST be either a string or a table.");
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54 assert(type(f) == "function", "Parameter f MUST be a function.");
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55 if cb_backends then assert(type(cb_backends) == "table"); end
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56 mechanisms[name] = f
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57 if cb_backends then
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58 mechanism_channelbindings[name] = {};
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59 for _, cb_name in ipairs(cb_backends) do
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60 mechanism_channelbindings[name][cb_name] = true;
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61 end
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62 end
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63 for _, backend_name in ipairs(backends) do
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64 if backend_mechanism[backend_name] == nil then backend_mechanism[backend_name] = {}; end
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65 t_insert(backend_mechanism[backend_name], name);
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66 end
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67 end
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68
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69 -- create a new SASL object which can be used to authenticate clients
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70 function new(realm, profile)
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71 local mechanisms = profile.mechanisms;
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72 if not mechanisms then
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73 mechanisms = {};
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74 for backend, f in pairs(profile) do
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75 if backend_mechanism[backend] then
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76 for _, mechanism in ipairs(backend_mechanism[backend]) do
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77 mechanisms[mechanism] = true;
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78 end
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79 end
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80 end
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81 profile.mechanisms = mechanisms;
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82 end
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83 return setmetatable({ profile = profile, realm = realm, mechs = mechanisms }, method);
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84 end
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85
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86 -- add a channel binding handler
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87 function method:add_cb_handler(name, f)
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88 if type(self.profile.cb) ~= "table" then
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89 self.profile.cb = {};
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90 end
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91 self.profile.cb[name] = f;
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92 return self;
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93 end
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94
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95 -- get a fresh clone with the same realm and profile
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96 function method:clean_clone()
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97 return new(self.realm, self.profile)
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98 end
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99
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100 -- get a list of possible SASL mechanims to use
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101 function method:mechanisms()
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102 local current_mechs = {};
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103 for mech, _ in pairs(self.mechs) do
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104 if mechanism_channelbindings[mech] and 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 else
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113 current_mechs[mech] = true;
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114 end
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115 end
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116 return current_mechs;
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117 end
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118
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119 -- select a mechanism to use
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120 function method:select(mechanism)
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121 if not self.selected and self.mechs[mechanism] then
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122 self.selected = mechanism;
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123 return true;
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124 end
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125 end
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126
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Tobias Markmann <tm@ayena.de>
parents: 2175
diff changeset
127 -- 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
diff changeset
128 function method:process(message)
2188
1fd38975addd Add support for plain profile in digest-md5 implementation.
Tobias Markmann <tm@ayena.de>
parents: 2187
diff changeset
129 --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
130 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
131 end
799
b7ea802f3527 Adding inital support for ANONYMOUS mechanism in SASL.
Tobias Markmann <tm@ayena.de>
parents: 760
diff changeset
132
2186
1112871916eb Move each mechanism in an own file.
Tobias Markmann <tm@ayena.de>
parents: 2185
diff changeset
133 -- load the mechanisms
3442
8cfacc41099e util.sasl: Simplified some code a bit.
Waqas Hussain <waqas20@gmail.com>
parents: 3441
diff changeset
134 require "util.sasl.plain" .init(registerMechanism);
8cfacc41099e util.sasl: Simplified some code a bit.
Waqas Hussain <waqas20@gmail.com>
parents: 3441
diff changeset
135 require "util.sasl.digest-md5".init(registerMechanism);
8cfacc41099e util.sasl: Simplified some code a bit.
Waqas Hussain <waqas20@gmail.com>
parents: 3441
diff changeset
136 require "util.sasl.anonymous" .init(registerMechanism);
8cfacc41099e util.sasl: Simplified some code a bit.
Waqas Hussain <waqas20@gmail.com>
parents: 3441
diff changeset
137 require "util.sasl.scram" .init(registerMechanism);
5687
e879b53e9df8 util.sasl.external: Add SASL EXTERNAL mechanism
Kim Alvefur <zash@zash.se>
parents: 4933
diff changeset
138 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
139
519
cccd610a0ef9 Insert copyright/license headers
Matthew Wild <mwild1@gmail.com>
parents: 508
diff changeset
140 return _M;