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7e0c35713bf5
util/sasl_cyrus.lua

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util/sasl_cyrus.lua @ 2729:7e0c35713bf5

mod_proxy65: Fix for old-style closing of connections (another source of tracebacks with libevent enabled)
author Matthew Wild <mwild1@gmail.com>
date Mon, 01 Mar 2010 18:07:37 +0000
parent 2720:289f68e704da
child 2881:4e6c6b1ddce7
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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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.
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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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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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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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30 module "sasl_cyrus"
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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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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 if not self.mechs then self:mechanisms(); end
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91 return self.mechs[mechanism];
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92 end
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93
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94 -- feed new messages to process into the library
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95 function method:process(message)
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96 local err;
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97 local data;
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98
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99 if self.mechanism then
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100 err, data = cyrussasl.server_start(self.cyrus, self.mechanism, message or "")
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101 else
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102 err, data = cyrussasl.server_step(self.cyrus, message or "")
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103 end
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104
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105 self.username = cyrussasl.get_username(self.cyrus)
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106
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107 if (err == 0) then -- SASL_OK
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108 return "success", data
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109 elseif (err == 1) then -- SASL_CONTINUE
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110 return "challenge", data
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111 elseif (err == -4) then -- SASL_NOMECH
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112 log("debug", "SASL mechanism not available from remote end")
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113 return "failure",
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114 "undefined-condition",
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115 "SASL mechanism not available"
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116 elseif (err == -13) then -- SASL_BADAUTH
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acb382c703e4 util.sasl_cyrus: Add text message from cyrussasl to <not-authorized/> errors.
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117 return "failure", "not-authorized", cyrussasl.get_message( self.cyrus )
2389
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118 else
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119 log("debug", "Got SASL error condition %d", err)
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120 return "failure",
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121 "undefined-condition",
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122 cyrussasl.get_message( self.cyrus )
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123 end
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124 end
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125
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126 return _M;