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267d6482bac6
util/sasl_cyrus.lua

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util/sasl_cyrus.lua @ 2444:267d6482bac6

util.datamanager: Use pposix.mkdir if available
author Matthew Wild <mwild1@gmail.com>
date Sun, 10 Jan 2010 23:13:30 +0000
parent 2404:d7abdd6893b8
child 2577:acb382c703e4
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
2389
8f6526da4757 Adding sasl_cyrus.lua. A sasl.lua drop-in replacement to use CyrusSASL for all c2s authentication.
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1 -- sasl.lua v0.4
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2 -- Copyright (C) 2008-2009 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.
8f6526da4757 Adding sasl_cyrus.lua. A sasl.lua drop-in replacement to use CyrusSASL for all c2s authentication.
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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.
8f6526da4757 Adding sasl_cyrus.lua. A sasl.lua drop-in replacement to use CyrusSASL for all c2s authentication.
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11 --
8f6526da4757 Adding sasl_cyrus.lua. A sasl.lua drop-in replacement to use CyrusSASL for all c2s authentication.
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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.
8f6526da4757 Adding sasl_cyrus.lua. A sasl.lua drop-in replacement to use CyrusSASL for all c2s authentication.
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13
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14 local cyrussasl = require "cyrussasl";
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15 local log = require "util.logger".init("sasl_cyrus");
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16 local array = require "util.array";
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17
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18 local tostring = tostring;
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19 local pairs, ipairs = pairs, ipairs;
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20 local t_insert, t_concat = table.insert, table.concat;
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21 local s_match = string.match;
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22 local setmetatable = setmetatable
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24 local keys = keys;
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26 local print = print
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27 local pcall = pcall
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28 local s_match, s_gmatch = string.match, string.gmatch
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29
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30 module "sasl_cyrus"
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31
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32 local method = {};
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33 method.__index = method;
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34 local initialized = false;
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35
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36 local function init(service_name)
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37 if not initialized then
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38 local st, errmsg = pcall(cyrussasl.server_init, service_name);
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39 if st then
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40 initialized = true;
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41 else
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42 log("error", "Failed to initialize CyrusSASL: %s", errmsg);
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43 end
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44 end
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45 end
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46
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47 -- create a new SASL object which can be used to authenticate clients
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48 function new(realm, service_name)
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49 local sasl_i = {};
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50
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51 init(service_name);
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52
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53 sasl_i.realm = realm;
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54 sasl_i.service_name = service_name;
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55 sasl_i.cyrus = cyrussasl.server_new(service_name, nil, nil, nil, nil)
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56 if sasl_i.cyrus == 0 then
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57 log("error", "got NULL return value from server_new")
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58 return nil;
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59 end
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60 cyrussasl.setssf(sasl_i.cyrus, 0, 0xffffffff)
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61 local s = setmetatable(sasl_i, method);
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62 return s;
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63 end
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64
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65 -- get a fresh clone with the same realm, profiles and forbidden mechanisms
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66 function method:clean_clone()
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67 return new(self.realm, self.service_name)
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68 end
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69
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70 -- set the forbidden mechanisms
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71 function method:forbidden( restrict )
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72 log("debug", "Called method:forbidden. NOT IMPLEMENTED.")
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73 return {}
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74 end
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75
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76 -- get a list of possible SASL mechanims to use
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77 function method:mechanisms()
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78 local mechanisms = {}
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79 local cyrus_mechs = cyrussasl.listmech(self.cyrus, nil, "", " ", "")
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80 for w in s_gmatch(cyrus_mechs, "[^ ]+") do
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81 mechanisms[w] = true;
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82 end
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83 self.mechs = mechanisms
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84 return array.collect(keys(mechanisms));
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85 end
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86
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87 -- select a mechanism to use
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88 function method:select(mechanism)
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89 self.mechanism = mechanism;
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90 return self.mechs[mechanism];
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91 end
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92
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93 -- feed new messages to process into the library
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94 function method:process(message)
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95 local err;
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96 local data;
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97
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98 if self.mechanism then
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99 err, data = cyrussasl.server_start(self.cyrus, self.mechanism, message or "")
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100 else
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101 err, data = cyrussasl.server_step(self.cyrus, message or "")
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102 end
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103
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104 self.username = cyrussasl.get_username(self.cyrus)
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105
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106 if (err == 0) then -- SASL_OK
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107 return "success", data
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108 elseif (err == 1) then -- SASL_CONTINUE
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109 return "challenge", data
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110 elseif (err == -4) then -- SASL_NOMECH
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111 log("debug", "SASL mechanism not available from remote end")
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112 return "failure",
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113 "undefined-condition",
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114 "SASL mechanism not available"
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115 elseif (err == -13) then -- SASL_BADAUTH
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116 return "failure", "not-authorized"
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117 else
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118 log("debug", "Got SASL error condition %d", err)
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119 return "failure",
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120 "undefined-condition",
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121 cyrussasl.get_message( self.cyrus )
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122 end
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123 end
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124
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125 return _M;