Mercurial > prosody-modules
annotate mod_auth_external/mod_auth_external.lua @ 3002:c91c9b87929e
mod_http_dir_listing2: Switch to util.interpolation for HTML rendering
author | Kim Alvefur <zash@zash.se> |
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date | Mon, 16 Apr 2018 21:18:47 +0200 |
parents | 3fb5f173f213 |
children | c458f940b011 |
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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 -- |
152 | 11 |
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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"); |
152 | 17 |
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18 local log = module._log; |
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19 local host = module.host; |
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20 |
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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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26 |
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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"); |
152 | 30 |
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31 |
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32 if not blocking then |
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33 log("debug", "External auth in non-blocking mode, yay!") |
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34 waiter, guard = async.waiter, async.guarder(); |
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35 elseif auth_processes > 1 then |
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36 log("warn", "external_auth_processes is greater than 1, but we are in blocking mode - reducing to 1"); |
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37 auth_processes = 1; |
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38 end |
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39 |
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40 local ptys = {}; |
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41 |
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42 local pty_options = { throw_errors = false, no_local_echo = true, use_path = false }; |
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43 for i = 1, auth_processes do |
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44 ptys[i] = lpty.new(pty_options); |
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45 end |
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46 |
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47 function module.unload() |
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48 for i = 1, auth_processes do |
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49 ptys[i]:endproc(); |
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50 end |
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51 end |
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52 |
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53 module:hook_global("server-cleanup", module.unload); |
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54 |
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55 local curr_process = 0; |
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56 function send_query(text) |
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57 curr_process = (curr_process%auth_processes)+1; |
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58 local pty = ptys[curr_process]; |
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59 |
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60 local finished_with_pty |
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61 if not blocking then |
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62 finished_with_pty = guard(pty); -- Prevent others from crossing this line while we're busy |
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63 end |
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64 if not pty:hasproc() then |
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65 local status, ret = pty:exitstatus(); |
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66 if status and (status ~= "exit" or ret ~= 0) then |
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67 log("warn", "Auth process exited unexpectedly with %s %d, restarting", status, ret or 0); |
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68 return nil; |
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69 end |
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70 local ok, err = pty:startproc(command); |
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71 if not ok then |
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72 log("error", "Failed to start auth process '%s': %s", command, err); |
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73 return nil; |
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74 end |
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75 log("debug", "Started auth process"); |
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76 end |
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77 |
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78 pty:send(text); |
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79 if blocking then |
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80 return pty:read(read_timeout); |
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81 else |
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82 local response; |
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83 local wait, done = waiter(); |
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84 server.addevent(pty:getfd(), server.event.EV_READ, function () |
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85 response = pty:read(); |
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86 done(); |
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87 return -1; |
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88 end); |
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89 wait(); |
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90 finished_with_pty(); |
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91 return response; |
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92 end |
152 | 93 end |
94 | |
95 function do_query(kind, username, password) | |
96 if not username then return nil, "not-acceptable"; end | |
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97 |
152 | 98 local query = (password and "%s:%s:%s:%s" or "%s:%s:%s"):format(kind, username, host, password); |
99 local len = #query | |
100 if len > 1000 then return nil, "policy-violation"; end | |
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101 |
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102 if script_type == "ejabberd" then |
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103 local lo = len % 256; |
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104 local hi = (len - lo) / 256; |
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105 query = string.char(hi, lo)..query; |
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106 elseif script_type == "generic" then |
158
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107 query = query..'\n'; |
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108 end |
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109 |
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110 local response, err = send_query(query); |
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111 if not response then |
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112 log("warn", "Error while waiting for result from auth process: %s", err or "unknown error"); |
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113 elseif (script_type == "ejabberd" and response == "\0\2\0\0") or |
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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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114 (script_type == "generic" and response:gsub("\r?\n$", "") == "0") then |
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115 return nil, "not-authorized"; |
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116 elseif (script_type == "ejabberd" and response == "\0\2\0\1") or |
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117 (script_type == "generic" and response:gsub("\r?\n$", "") == "1") then |
158
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118 return true; |
152 | 119 else |
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120 log("warn", "Unable to interpret data from auth process, %s", |
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121 (response:match("^error:") and response) or ("["..#response.." bytes]")); |
152 | 122 return nil, "internal-server-error"; |
123 end | |
124 end | |
125 | |
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mod_auth_external, mod_auth_internal_yubikey: Get rid of useless wrapper function around the auth provider.
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126 local provider = {}; |
152 | 127 |
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128 function provider.test_password(username, password) |
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129 return do_query("auth", username, password); |
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130 end |
152 | 131 |
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132 function provider.set_password(username, password) |
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133 return do_query("setpass", username, password); |
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134 end |
152 | 135 |
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136 function provider.user_exists(username) |
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|
137 return do_query("isuser", username); |
152 | 138 end |
139 | |
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Kim Alvefur <zash@zash.se>
parents:
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diff
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140 function provider.create_user(username, password) -- luacheck: ignore 212 |
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141 return nil, "Account creation/modification not available."; |
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diff
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|
142 end |
816
960007b0901e
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parents:
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diff
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|
143 |
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diff
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|
144 function provider.get_sasl_handler() |
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parents:
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diff
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|
145 local testpass_authentication_profile = { |
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Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
146 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:
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diff
changeset
|
147 return usermanager.test_password(username, realm, password), true; |
816
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parents:
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diff
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|
148 end, |
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parents:
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diff
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|
149 }; |
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parents:
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diff
changeset
|
150 return new_sasl(host, testpass_authentication_profile); |
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parents:
814
diff
changeset
|
151 end |
960007b0901e
mod_auth_external, mod_auth_internal_yubikey: Get rid of useless wrapper function around the auth provider.
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parents:
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diff
changeset
|
152 |
960007b0901e
mod_auth_external, mod_auth_internal_yubikey: Get rid of useless wrapper function around the auth provider.
Waqas Hussain <waqas20@gmail.com>
parents:
814
diff
changeset
|
153 module:provides("auth", provider); |