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annotate mod_auth_external/mod_auth_external.lua @ 305:4c3abf1a9b5a

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mod_auth_*, mod_saslauth_muc: Update SASL callbacks to take SASL handler as first argument.
author Waqas Hussain <waqas20@gmail.com>
date Mon, 27 Dec 2010 20:15:21 +0500
parents 3da3d6480e65
children 8e9e5c7d97ff
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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 nodeprep = require "util.encodings".stringprep.nodeprep;
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14 --local process = require "process";
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15 local lpc = require "lpc";
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16
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17 local config = require "core.configmanager";
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18 local log = module._log;
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19 local host = module.host;
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20 local script_type = config.get(host, "core", "external_auth_protocol") or "generic";
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21 assert(script_type == "ejabberd" or script_type == "generic");
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22 local command = config.get(host, "core", "external_auth_command") or "";
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23 assert(type(command) == "string");
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24 assert(not host:find(":"));
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25 local usermanager = require "core.usermanager";
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26 local jid_bare = require "util.jid".bare;
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27 local new_sasl = require "util.sasl".new;
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28
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29 --local proc;
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30 local pid;
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31 local readfile;
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32 local writefile;
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33
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34 local function send_query(text)
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35 if pid and lpc.wait(pid,1) ~= nil then
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36 log("debug","error, process died, force reopen");
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37 pid=nil;
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38 end
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39 if not pid then
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40 log("debug", "Opening process " .. command);
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41 -- proc = process.popen(command);
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42 pid, writefile, readfile = lpc.run(command);
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43 end
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44 -- if not proc then
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45 if not pid then
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46 log("debug", "Process failed to open");
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47 return nil;
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48 end
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49 -- proc:write(text);
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50 -- proc:flush();
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51
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52 writefile:write(text);
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53 writefile:flush();
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54 if script_type == "ejabberd" then
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55 -- return proc:read(4); -- FIXME do properly
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56 return readfile:read(4); -- FIXME do properly
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57 elseif script_type == "generic" then
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58 -- return proc:read(1);
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59 return readfile:read();
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60 end
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61 end
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62
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63 function do_query(kind, username, password)
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64 if not username then return nil, "not-acceptable"; end
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65 username = nodeprep(username);
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66 if not username then return nil, "jid-malformed"; end
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67
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68 local query = (password and "%s:%s:%s:%s" or "%s:%s:%s"):format(kind, username, host, password);
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69 local len = #query
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70 if len > 1000 then return nil, "policy-violation"; end
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71
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72 if script_type == "ejabberd" then
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73 local lo = len % 256;
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74 local hi = (len - lo) / 256;
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75 query = string.char(hi, lo)..query;
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76 end
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77 if script_type == "generic" then
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78 query = query..'\n';
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79 end
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80
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81 local response = send_query(query);
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82 if (script_type == "ejabberd" and response == "\0\2\0\0") or
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83 (script_type == "generic" and response == "0") then
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84 return nil, "not-authorized";
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85 elseif (script_type == "ejabberd" and response == "\0\2\0\1") or
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86 (script_type == "generic" and response == "1") then
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87 return true;
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88 else
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89 log("debug", "Nonsense back");
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90 --proc:close();
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91 --proc = nil;
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92 return nil, "internal-server-error";
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93 end
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94 end
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95
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96 function new_external_provider(host)
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97 local provider = { name = "external" };
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98
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99 function provider.test_password(username, password)
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100 return do_query("auth", username, password);
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101 end
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102
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103 function provider.set_password(username, password)
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104 return do_query("setpass", username, password);
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105 end
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106
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107 function provider.user_exists(username)
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108 return do_query("isuser", username);
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109 end
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110
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111 function provider.create_user(username, password) return nil, "Account creation/modification not available."; end
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112
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113 function provider.get_sasl_handler()
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114 local realm = module:get_option("sasl_realm") or module.host;
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115 local testpass_authentication_profile = {
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116 plain_test = function(sasl, username, password, realm)
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117 local prepped_username = nodeprep(username);
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118 if not prepped_username then
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119 log("debug", "NODEprep failed on username: %s", username);
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120 return "", nil;
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121 end
217
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122 return usermanager.test_password(prepped_username, realm, password), true;
166
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123 end,
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124 };
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125 return new_sasl(realm, testpass_authentication_profile);
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126 end
152
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127
158
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128 function provider.is_admin(jid)
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129 local admins = config.get(host, "core", "admins");
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130 if admins ~= config.get("*", "core", "admins") then
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131 if type(admins) == "table" then
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132 jid = jid_bare(jid);
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133 for _,admin in ipairs(admins) do
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134 if admin == jid then return true; end
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135 end
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136 elseif admins then
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137 log("error", "Option 'admins' for host '%s' is not a table", host);
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138 end
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139 end
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140 return usermanager.is_admin(jid); -- Test whether it's a global admin instead
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141 end
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142
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143 return provider;
152
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144 end
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145
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146 module:add_item("auth-provider", new_external_provider(module.host));