prosody-modules
490cb9161c81
mod_auth_external/mod_auth_external.lua

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mod_auth_external/mod_auth_external.lua @ 902:490cb9161c81

mod_auth_{external,internal_yubikey,ldap,ldap2,sql}: No need to nodeprep in SASL handler.
author Waqas Hussain <waqas20@gmail.com>
date Sat, 26 Jan 2013 04:34:05 +0500
parent 846:5ddc43ce8993
child 1086:50ee38e95e75
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 --
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2 -- NOTE: currently this uses lpc; when waqas fixes process, it can go back to that
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3 --
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4 -- Prosody IM
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5 -- Copyright (C) 2010 Waqas Hussain
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6 -- Copyright (C) 2010 Jeff Mitchell
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7 --
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8 -- This project is MIT/X11 licensed. Please see the
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9 -- COPYING file in the source package for more information.
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10 --
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13 --local process = require "process";
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14 local lpc; pcall(function() lpc = require "lpc"; end);
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15
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16 local config = require "core.configmanager";
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17 local log = module._log;
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18 local host = module.host;
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19 local script_type = config.get(host, "core", "external_auth_protocol") or "generic";
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20 assert(script_type == "ejabberd" or script_type == "generic");
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21 local command = config.get(host, "core", "external_auth_command") or "";
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22 assert(type(command) == "string");
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23 assert(not host:find(":"));
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24 local usermanager = require "core.usermanager";
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25 local jid_bare = require "util.jid".bare;
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26 local new_sasl = require "util.sasl".new;
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27
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28 local function send_query(text)
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29 local tmpname = os.tmpname();
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30 local tmpfile = io.open(tmpname, "wb");
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31 tmpfile:write(text);
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32 tmpfile:close();
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33 local p = io.popen(command.." < "..tmpname, "r");
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34 local result;
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35 if script_type == "ejabberd" then
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36 result = p:read(4);
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37 elseif script_type == "generic" then
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38 result = p:read();
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39 end
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40 os.remove(tmpname);
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41 p:close();
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42 return result;
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43 end
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44
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45 if lpc then
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46 --local proc;
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47 local pid;
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48 local readfile;
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49 local writefile;
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50
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51 function send_query(text)
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52 if pid and lpc.wait(pid,1) ~= nil then
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53 log("debug","error, process died, force reopen");
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54 pid=nil;
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55 end
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56 if not pid then
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57 log("debug", "Opening process " .. command);
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58 -- proc = process.popen(command);
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59 pid, writefile, readfile = lpc.run(command);
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60 end
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61 -- if not proc then
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62 if not pid then
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63 log("debug", "Process failed to open");
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64 return nil;
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65 end
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66 -- proc:write(text);
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67 -- proc:flush();
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68
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69 writefile:write(text);
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70 writefile:flush();
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71 if script_type == "ejabberd" then
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72 -- return proc:read(4); -- FIXME do properly
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73 return readfile:read(4); -- FIXME do properly
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74 elseif script_type == "generic" then
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75 -- return proc:read(1);
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76 return readfile:read();
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77 end
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78 end
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79 end
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80
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81 function do_query(kind, username, password)
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82 if not username then return nil, "not-acceptable"; end
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83
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84 local query = (password and "%s:%s:%s:%s" or "%s:%s:%s"):format(kind, username, host, password);
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85 local len = #query
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86 if len > 1000 then return nil, "policy-violation"; end
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87
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88 if script_type == "ejabberd" then
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89 local lo = len % 256;
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90 local hi = (len - lo) / 256;
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91 query = string.char(hi, lo)..query;
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92 end
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93 if script_type == "generic" then
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94 query = query..'\n';
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95 end
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96
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97 local response = send_query(query);
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98 if (script_type == "ejabberd" and response == "\0\2\0\0") or
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99 (script_type == "generic" and response == "0") then
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100 return nil, "not-authorized";
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101 elseif (script_type == "ejabberd" and response == "\0\2\0\1") or
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102 (script_type == "generic" and response == "1") then
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103 return true;
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104 else
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105 log("debug", "Nonsense back");
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106 --proc:close();
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107 --proc = nil;
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108 return nil, "internal-server-error";
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109 end
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110 end
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111
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112 local host = module.host;
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113 local provider = {};
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114
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115 function provider.test_password(username, password)
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116 return do_query("auth", username, password);
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117 end
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118
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119 function provider.set_password(username, password)
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120 return do_query("setpass", username, password);
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121 end
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122
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123 function provider.user_exists(username)
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124 return do_query("isuser", username);
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125 end
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126
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127 function provider.create_user(username, password) return nil, "Account creation/modification not available."; end
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128
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129 function provider.get_sasl_handler()
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130 local testpass_authentication_profile = {
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131 plain_test = function(sasl, username, password, realm)
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132 return usermanager.test_password(username, realm, password), true;
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133 end,
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134 };
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135 return new_sasl(host, testpass_authentication_profile);
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136 end
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137
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138 function provider.is_admin(jid)
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139 local admins = config.get(host, "core", "admins");
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140 if admins ~= config.get("*", "core", "admins") then
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141 if type(admins) == "table" then
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142 jid = jid_bare(jid);
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143 for _,admin in ipairs(admins) do
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144 if admin == jid then return true; end
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145 end
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146 elseif admins then
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147 log("error", "Option 'admins' for host '%s' is not a table", host);
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148 end
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149 end
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150 return usermanager.is_admin(jid); -- Test whether it's a global admin instead
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151 end
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152
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153 module:provides("auth", provider);