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util/sasl_cyrus.lua

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util/sasl_cyrus.lua @ 2400:b8d2168dc9c3

util.sasl_cyrus: Fixing cyrus mechanism list parsing. (Thanks darkrain)
author Tobias Markmann <tm@ayena.de>
date Mon, 28 Dec 2009 20:21:49 +0100
parent 2396:39b2523bcf44
child 2401:dbfdcb75209a
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rev   line source
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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 --
8f6526da4757 Adding sasl_cyrus.lua. A sasl.lua drop-in replacement to use CyrusSASL for all c2s authentication.
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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.
8f6526da4757 Adding sasl_cyrus.lua. A sasl.lua drop-in replacement to use CyrusSASL for all c2s authentication.
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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
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35 pcall(cyrussasl.server_init, "prosody")
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36
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37 -- create a new SASL object which can be used to authenticate clients
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38 function new(realm, service_name)
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39 local sasl_i = {};
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40 sasl_i.realm = realm;
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41 sasl_i.service_name = service_name;
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42 sasl_i.cyrus = cyrussasl.server_new(service_name, nil, nil, nil, nil)
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43 if sasl_i.cyrus == 0 then
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44 log("error", "got NULL return value from server_new")
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45 return nil;
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46 end
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47 cyrussasl.setssf(sasl_i.cyrus, 0, 0xffffffff)
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48 local s = setmetatable(sasl_i, method);
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49 return s;
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50 end
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51
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52 -- get a fresh clone with the same realm, profiles and forbidden mechanisms
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53 function method:clean_clone()
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54 return new(self.realm, self.service_name)
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55 end
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56
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57 -- set the forbidden mechanisms
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58 function method:forbidden( restrict )
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59 log("debug", "Called method:forbidden. NOT IMPLEMENTED.")
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60 return {}
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61 end
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62
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63 -- get a list of possible SASL mechanims to use
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64 function method:mechanisms()
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65 local mechanisms = {}
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66 local cyrus_mechs = cyrussasl.listmech(self.cyrus, nil, "", " ", "")
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67 for w in s_gmatch(cyrus_mechs, "[^ ]+") do
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68 mechanisms[w] = true;
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69 end
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70 self.mechanisms = mechanisms
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71 return array.collect(keys(mechanisms));
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72 end
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73
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74 -- select a mechanism to use
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75 function method:select(mechanism)
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76 self.mechanism = mechanism;
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77 return self.mechanisms[mechanism];
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78 end
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79
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80 -- feed new messages to process into the library
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81 function method:process(message)
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82 local err;
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83 local data;
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84
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85 if self.mechanism then
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86 err, data = cyrussasl.server_start(self.cyrus, self.mechanism, message or "")
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87 else
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88 err, data = cyrussasl.server_step(self.cyrus, message or "")
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89 end
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90
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91 self.username = cyrussasl.get_username(self.cyrus)
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92
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93 if (err == 0) then -- SASL_OK
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94 return "success", data
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95 elseif (err == 1) then -- SASL_CONTINUE
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96 return "challenge", data
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97 elseif (err == -4) then -- SASL_NOMECH
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98 log("debug", "SASL mechanism not available from remote end")
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99 return "failure",
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100 "undefined-condition",
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101 "SASL mechanism not available"
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102 elseif (err == -13) then -- SASL_BADAUTH
8f6526da4757 Adding sasl_cyrus.lua. A sasl.lua drop-in replacement to use CyrusSASL for all c2s authentication.
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parents:
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103 return "failure", "not-authorized"
8f6526da4757 Adding sasl_cyrus.lua. A sasl.lua drop-in replacement to use CyrusSASL for all c2s authentication.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
104 else
8f6526da4757 Adding sasl_cyrus.lua. A sasl.lua drop-in replacement to use CyrusSASL for all c2s authentication.
Tobias Markmann <tm@ayena.de>
parents:
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105 log("debug", "Got SASL error condition %d", err)
8f6526da4757 Adding sasl_cyrus.lua. A sasl.lua drop-in replacement to use CyrusSASL for all c2s authentication.
Tobias Markmann <tm@ayena.de>
parents:
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106 return "failure",
8f6526da4757 Adding sasl_cyrus.lua. A sasl.lua drop-in replacement to use CyrusSASL for all c2s authentication.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
107 "undefined-condition",
8f6526da4757 Adding sasl_cyrus.lua. A sasl.lua drop-in replacement to use CyrusSASL for all c2s authentication.
Tobias Markmann <tm@ayena.de>
parents:
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108 cyrussasl.get_message( self.cyrus )
8f6526da4757 Adding sasl_cyrus.lua. A sasl.lua drop-in replacement to use CyrusSASL for all c2s authentication.
Tobias Markmann <tm@ayena.de>
parents:
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109 end
8f6526da4757 Adding sasl_cyrus.lua. A sasl.lua drop-in replacement to use CyrusSASL for all c2s authentication.
Tobias Markmann <tm@ayena.de>
parents:
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110 end
8f6526da4757 Adding sasl_cyrus.lua. A sasl.lua drop-in replacement to use CyrusSASL for all c2s authentication.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
111
8f6526da4757 Adding sasl_cyrus.lua. A sasl.lua drop-in replacement to use CyrusSASL for all c2s authentication.
Tobias Markmann <tm@ayena.de>
parents:
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112 return _M;