prosody
7a75cbc4d87c
util/sasl.lua

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util/sasl.lua @ 13068:7a75cbc4d87c

util.human.io: Fix column width miscalculation Fixes that the more fixed width columns there are, the narrower the resulting table becomes. A right-aligned variable-width column at the last position should always be flush to the right side of the terminal.
author Kim Alvefur <zash@zash.se>
date Sun, 09 Apr 2023 22:31:12 +0200
parent 13060:8dd5d247f989
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 -- luacheck: std none
38
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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-existent
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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 registered_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 mechanism
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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 registered_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 local 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 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 mechanisms 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] then
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105 if self.profile.cb then
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106 local ok = false;
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107 for cb_name, _ in pairs(self.profile.cb) do
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108 if mechanism_channelbindings[mech][cb_name] then
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109 ok = true;
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110 end
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111 end
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112 if ok == true then current_mechs[mech] = true; end
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113 end
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114 else
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115 current_mechs[mech] = true;
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116 end
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117 end
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118 return current_mechs;
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119 end
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120
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121 -- select a mechanism to use
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122 function method:select(mechanism)
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123 if not self.selected and self.mechs[mechanism] then
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124 self.selected = mechanism;
5e5d136d9de0 util.sasl, util.sasl_cyrus: Mechanism selection cleaned up to be more consistent.
Waqas Hussain <waqas20@gmail.com>
parents: 3549
diff changeset
125 return true;
2185
e92339c48ee6 Fail if mechanism has already been selected.
Tobias Markmann <tm@ayena.de>
parents: 2184
diff changeset
126 end
799
b7ea802f3527 Adding inital support for ANONYMOUS mechanism in SASL.
Tobias Markmann <tm@ayena.de>
parents: 760
diff changeset
127 end
b7ea802f3527 Adding inital support for ANONYMOUS mechanism in SASL.
Tobias Markmann <tm@ayena.de>
parents: 760
diff changeset
128
2176
aaf2b2df61f7 Mostly making the code run; includes fixing typos and so on.
Tobias Markmann <tm@ayena.de>
parents: 2175
diff changeset
129 -- 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
130 function method:process(message)
2188
1fd38975addd Add support for plain profile in digest-md5 implementation.
Tobias Markmann <tm@ayena.de>
parents: 2187
diff changeset
131 --if message == "" or message == nil then return "failure", "malformed-request" end
8382
e5d00bf4a4d5 util: Various minor changes to please [luacheck]
Kim Alvefur <zash@zash.se>
parents: 6777
diff changeset
132 return registered_mechanisms[self.selected](self, message);
15
c0d754774db2 adding SASL lib with PLAIN support, not tested yet
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
133 end
799
b7ea802f3527 Adding inital support for ANONYMOUS mechanism in SASL.
Tobias Markmann <tm@ayena.de>
parents: 760
diff changeset
134
2186
1112871916eb Move each mechanism in an own file.
Tobias Markmann <tm@ayena.de>
parents: 2185
diff changeset
135 -- load the mechanisms
12975
d10957394a3c util: Prefix module imports with prosody namespace
Kim Alvefur <zash@zash.se>
parents: 12911
diff changeset
136 require "prosody.util.sasl.plain" .init(registerMechanism);
d10957394a3c util: Prefix module imports with prosody namespace
Kim Alvefur <zash@zash.se>
parents: 12911
diff changeset
137 require "prosody.util.sasl.anonymous" .init(registerMechanism);
d10957394a3c util: Prefix module imports with prosody namespace
Kim Alvefur <zash@zash.se>
parents: 12911
diff changeset
138 require "prosody.util.sasl.oauthbearer" .init(registerMechanism);
d10957394a3c util: Prefix module imports with prosody namespace
Kim Alvefur <zash@zash.se>
parents: 12911
diff changeset
139 require "prosody.util.sasl.scram" .init(registerMechanism);
d10957394a3c util: Prefix module imports with prosody namespace
Kim Alvefur <zash@zash.se>
parents: 12911
diff changeset
140 require "prosody.util.sasl.external" .init(registerMechanism);
15
c0d754774db2 adding SASL lib with PLAIN support, not tested yet
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
141
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
142 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
143 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
144 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
145 };