Mercurial > prosody-modules

annotate mod_auth_external/mod_auth_external.lua @ 2608:362ca94192ee

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mod_smacks: Add resumed session to event "smacks-hibernation-end" Older versions of this event only have the "intermediate" session in event.session (the one used to resume the existing session), but not the resumed one. This adds event.resumed which contains the resumed one alongside to event.session.
author tmolitor <thilo@eightysoft.de>
date Sat, 11 Mar 2017 01:37:28 +0100
parents 199fb0a82c0a
children 45380b77303d
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1 --
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2 -- Prosody IM
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3 -- Copyright (C) 2010 Waqas Hussain
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4 -- Copyright (C) 2010 Jeff Mitchell
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5 -- Copyright (C) 2013 Mikael Nordfeldth
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6 -- Copyright (C) 2013 Matthew Wild, finally came to fix it all
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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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12 local lpty = assert(require "lpty", "mod_auth_external requires lpty: https://modules.prosody.im/mod_auth_external.html#installation");
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13 local usermanager = require "core.usermanager";
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14 local new_sasl = require "util.sasl".new;
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15 local server = require "net.server";
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16 local have_async, async = pcall(require, "util.async");
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18 local log = module._log;
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19 local host = module.host;
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21 local script_type = module:get_option_string("external_auth_protocol", "generic");
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22 local command = module:get_option_string("external_auth_command", "");
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23 local read_timeout = module:get_option_number("external_auth_timeout", 5);
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24 local blocking = module:get_option_boolean("external_auth_blocking", not(have_async and server.event and lpty.getfd));
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25 local auth_processes = module:get_option_number("external_auth_processes", 1);
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27 assert(script_type == "ejabberd" or script_type == "generic", "Config error: external_auth_protocol must be 'ejabberd' or 'generic'");
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28 assert(not host:find(":"), "Invalid hostname");
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31 if not blocking then
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32 log("debug", "External auth in non-blocking mode, yay!")
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33 waiter, guard = async.waiter, async.guarder();
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34 elseif auth_processes > 1 then
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35 log("warn", "external_auth_processes is greater than 1, but we are in blocking mode - reducing to 1");
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36 auth_processes = 1;
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37 end
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39 local ptys = {};
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41 local pty_options = { throw_errors = false, no_local_echo = true, use_path = false };
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42 for i = 1, auth_processes do
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43 ptys[i] = lpty.new(pty_options);
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44 end
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46 local curr_process = 0;
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47 function send_query(text)
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48 curr_process = (curr_process%auth_processes)+1;
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49 local pty = ptys[curr_process];
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51 local finished_with_pty
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52 if not blocking then
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53 finished_with_pty = guard(pty); -- Prevent others from crossing this line while we're busy
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54 end
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55 if not pty:hasproc() then
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56 local status, ret = pty:exitstatus();
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57 if status and (status ~= "exit" or ret ~= 0) then
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58 log("warn", "Auth process exited unexpectedly with %s %d, restarting", status, ret or 0);
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59 return nil;
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60 end
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61 local ok, err = pty:startproc(command);
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62 if not ok then
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63 log("error", "Failed to start auth process '%s': %s", command, err);
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64 return nil;
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65 end
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66 log("debug", "Started auth process");
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67 end
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68
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69 pty:send(text);
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70 if blocking then
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71 return pty:read(read_timeout);
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72 else
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73 local response;
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74 local wait, done = waiter();
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75 server.addevent(pty:getfd(), server.event.EV_READ, function ()
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76 response = pty:read();
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77 done();
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78 return -1;
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79 end);
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80 wait();
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81 finished_with_pty();
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82 return response;
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83 end
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84 end
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85
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86 function do_query(kind, username, password)
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87 if not username then return nil, "not-acceptable"; end
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88
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89 local query = (password and "%s:%s:%s:%s" or "%s:%s:%s"):format(kind, username, host, password);
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90 local len = #query
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91 if len > 1000 then return nil, "policy-violation"; end
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92
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93 if script_type == "ejabberd" then
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94 local lo = len % 256;
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95 local hi = (len - lo) / 256;
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96 query = string.char(hi, lo)..query;
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97 elseif script_type == "generic" then
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98 query = query..'\n';
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99 end
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100
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101 local response, err = send_query(query);
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102 if not response then
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103 log("warn", "Error while waiting for result from auth process: %s", err or "unknown error");
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104 elseif (script_type == "ejabberd" and response == "\0\2\0\0") or
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105 (script_type == "generic" and response:gsub("\r?\n$", "") == "0") then
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106 return nil, "not-authorized";
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107 elseif (script_type == "ejabberd" and response == "\0\2\0\1") or
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108 (script_type == "generic" and response:gsub("\r?\n$", "") == "1") then
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109 return true;
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110 else
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111 log("warn", "Unable to interpret data from auth process, %s", (response:match("^error:") and response) or ("["..#response.." bytes]"));
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112 return nil, "internal-server-error";
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113 end
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114 end
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115
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116 local host = module.host;
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117 local provider = {};
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118
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119 function provider.test_password(username, password)
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120 return do_query("auth", username, password);
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121 end
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122
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123 function provider.set_password(username, password)
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124 return do_query("setpass", username, password);
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125 end
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126
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127 function provider.user_exists(username)
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128 return do_query("isuser", username);
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129 end
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130
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131 function provider.create_user(username, password) return nil, "Account creation/modification not available."; end
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132
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133 function provider.get_sasl_handler()
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134 local testpass_authentication_profile = {
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135 plain_test = function(sasl, username, password, realm)
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490cb9161c81 mod_auth_{external,internal_yubikey,ldap,ldap2,sql}: No need to nodeprep in SASL handler.
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136 return usermanager.test_password(username, realm, password), true;
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137 end,
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138 };
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139 return new_sasl(host, testpass_authentication_profile);
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140 end
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141
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142 module:provides("auth", provider);