Mercurial > prosody-modules

annotate mod_auth_external_insecure/mod_auth_external_insecure.lua @ 4838:fd2e48d4ac94

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mod_bookmarks2: Advertise XEP-0049 support In the case mod_private isn’t loaded, some clients (like poezio) won’t even attempt to use Private XML Storage unless this feature is advertised. This is on the domain JID and not on the account JID!
author Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
date Sun, 26 Dec 2021 14:51:35 +0100
parents f84ede3e9e3b
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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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", true); -- non-blocking is very experimental
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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",
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28 "Config error: external_auth_protocol must be 'ejabberd' or 'generic'");
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29 assert(not host:find(":"), "Invalid hostname");
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32 if not blocking then
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33 assert(server.event, "External auth non-blocking mode requires libevent installed and enabled");
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34 log("debug", "External auth in non-blocking mode, yay!")
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35 waiter, guard = async.waiter, async.guarder();
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36 elseif auth_processes > 1 then
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37 log("warn", "external_auth_processes is greater than 1, but we are in blocking mode - reducing to 1");
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38 auth_processes = 1;
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39 end
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41 local ptys = {};
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43 local pty_options = { throw_errors = false, no_local_echo = true, use_path = false };
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44 for i = 1, auth_processes do
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45 ptys[i] = lpty.new(pty_options);
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46 end
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47
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48 function module.unload()
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49 for i = 1, auth_processes do
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50 ptys[i]:endproc();
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51 end
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52 end
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54 module:hook_global("server-cleanup", module.unload);
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56 local curr_process = 0;
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57 function send_query(text)
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58 curr_process = (curr_process%auth_processes)+1;
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59 local pty = ptys[curr_process];
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61 local finished_with_pty
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62 if not blocking then
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63 finished_with_pty = guard(pty); -- Prevent others from crossing this line while we're busy
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64 end
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65 if not pty:hasproc() then
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66 local status, ret = pty:exitstatus();
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67 if status and (status ~= "exit" or ret ~= 0) then
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68 log("warn", "Auth process exited unexpectedly with %s %d, restarting", status, ret or 0);
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69 return nil;
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70 end
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71 local ok, err = pty:startproc(command);
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72 if not ok then
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73 log("error", "Failed to start auth process '%s': %s", command, err);
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74 return nil;
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75 end
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76 log("debug", "Started auth process");
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77 end
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78
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79 pty:send(text);
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80 if blocking then
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81 return pty:read(read_timeout);
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82 else
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83 local response;
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84 local wait, done = waiter();
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85 server.addevent(pty:getfd(), server.event.EV_READ, function ()
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86 response = pty:read();
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87 done();
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88 return -1;
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89 end);
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90 wait();
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91 finished_with_pty();
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92 return response;
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93 end
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94 end
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95
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96 function do_query(kind, username, password)
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97 if not username then return nil, "not-acceptable"; end
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98
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99 local query = (password and "%s:%s:%s:%s" or "%s:%s:%s"):format(kind, username, host, password);
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100 local len = #query
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101 if len > 1000 then return nil, "policy-violation"; end
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102
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103 if script_type == "ejabberd" then
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104 local lo = len % 256;
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105 local hi = (len - lo) / 256;
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106 query = string.char(hi, lo)..query;
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107 elseif script_type == "generic" then
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108 query = query..'\n';
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109 end
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7dbde05b48a9 all the things: Remove trailing whitespace
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110
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111 local response, err = send_query(query);
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112 if not response then
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113 log("warn", "Error while waiting for result from auth process: %s", err or "unknown error");
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114 elseif (script_type == "ejabberd" and response == "\0\2\0\0") or
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61f95bf51b35 mod_auth_external: Switch to lpty, remove file-based fallback, improve error messages and handling. Should greatly increase compatibility with scripts.
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115 (script_type == "generic" and response:gsub("\r?\n$", "") == "0") then
158
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116 return nil, "not-authorized";
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117 elseif (script_type == "ejabberd" and response == "\0\2\0\1") or
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parents: 1086
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118 (script_type == "generic" and response:gsub("\r?\n$", "") == "1") then
158
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parents: 152
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119 return true;
152
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120 else
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Kim Alvefur <zash@zash.se>
parents: 1997
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121 log("warn", "Unable to interpret data from auth process, %s",
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parents: 1997
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122 (response:match("^error:") and response) or ("["..#response.." bytes]"));
152
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123 return nil, "internal-server-error";
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124 end
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125 end
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126
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127 local provider = {};
152
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128
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129 function provider.test_password(username, password)
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130 return do_query("auth", username, password);
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131 end
152
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132
816
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parents: 814
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133 function provider.set_password(username, password)
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134 return do_query("setpass", username, password);
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parents: 814
diff changeset
135 end
152
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parents:
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136
816
960007b0901e mod_auth_external, mod_auth_internal_yubikey: Get rid of useless wrapper function around the auth provider.
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parents: 814
diff changeset
137 function provider.user_exists(username)
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138 return do_query("isuser", username);
152
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139 end
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parents:
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140
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Kim Alvefur <zash@zash.se>
parents: 2828
diff changeset
141 function provider.create_user(username, password) -- luacheck: ignore 212
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parents: 2828
diff changeset
142 return nil, "Account creation/modification not available.";
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Kim Alvefur <zash@zash.se>
parents: 2828
diff changeset
143 end
816
960007b0901e mod_auth_external, mod_auth_internal_yubikey: Get rid of useless wrapper function around the auth provider.
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parents: 814
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144
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diff changeset
145 function provider.get_sasl_handler()
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diff changeset
146 local testpass_authentication_profile = {
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parents: 814
diff changeset
147 plain_test = function(sasl, username, password, realm)
902
490cb9161c81 mod_auth_{external,internal_yubikey,ldap,ldap2,sql}: No need to nodeprep in SASL handler.
Waqas Hussain <waqas20@gmail.com>
parents: 846
diff changeset
148 return usermanager.test_password(username, realm, password), true;
816
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parents: 814
diff changeset
149 end,
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diff changeset
150 };
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parents: 814
diff changeset
151 return new_sasl(host, testpass_authentication_profile);
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parents: 814
diff changeset
152 end
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153
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diff changeset
154 module:provides("auth", provider);