prosody-modules
d44926f39f00
mod_auth_ha1/mod_auth_ha1.lua

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mod_auth_ha1/mod_auth_ha1.lua @ 1472:d44926f39f00

mod_auth_ha1: Authentication module for 'HA1' hashed credentials in a text file, as used by reTurnServer
author Matthew Wild <mwild1@gmail.com>
date Sat, 26 Jul 2014 21:53:52 +0100
child 1473:31c4d92a81e5
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1471:153df603f73d 1472:d44926f39f00
1 -- Prosody IM
2 -- Copyright (C) 2014 Matthew Wild
3 --
4 -- This project is MIT/X11 licensed. Please see the
5 -- COPYING file in the source package for more information.
6 --
7
8 local usermanager = require "core.usermanager";
9 local new_sasl = require "util.sasl".new;
10
11 local nodeprep = require "util.encodings".stringprep.nodeprep;
12 local nameprep = require "util.encodings".stringprep.nameprep;
13 local md5 = require "util.hashes".md5;
14
15 local host = module.host;
16
17 local auth_filename = module:get_option_string("auth_ha1_file", "auth.txt");
18 local auth_data = {};
19
20 function reload_auth_data()
21 local f, err = io.open(auth_filename);
22 if not f then
23 module:log("error", "Failed to read from auth file: %s", err);
24 return;
25 end
26 auth_data = {};
27 local line_number, imported_count, not_authorized_count = 0, 0, 0;
28 for line in f:lines() do
29 line_number = line_number + 1;
30 local username, hash, realm, state = line:match("^([^:]+):(%x+):([^:]+):(.+)$");
31 if not username then
32 module:log("error", "Unable to parse line %d of auth file, skipping", line_number);
33 else
34 username, realm = nodeprep(username), nameprep(realm);
35 if not username then
36 module:log("error", "Invalid username on line %d of auth file, skipping", line_number);
37 elseif not realm then
38 module:log("error", "Invalid hostname/realm on line %d of auth file, skipping", line_number);
39 elseif state ~= "authorized" then
40 not_authorized_count = not_authorized_count + 1;
41 elseif realm == host then
42 auth_data[username] = hash;
43 imported_count = imported_count + 1;
44 end
45 end
46 end
47 f:close();
48 module:log("debug", "Loaded %d accounts from auth file (%d authorized)", imported_count, imported_count-not_authorized_count);
49 end
50
51 function module.load()
52 reload_auth_data();
53 end
54
55 module:hook_global("config-reloaded", reload_auth_data);
56
57 -- define auth provider
58 local provider = {};
59
60 function provider.test_password(username, password)
61 module:log("debug", "test password for user %s at host %s, %s", username, host, password);
62
63 local test_hash = md5(username..":"..host..":"..password, true);
64
65 if test_hash == auth_data[username] then
66 return true;
67 else
68 return nil, "Auth failed. Invalid username or password.";
69 end
70 end
71
72 function provider.set_password(username, password)
73 return nil, "Changing passwords not supported";
74 end
75
76 function provider.user_exists(username)
77 if not auth_data[username] then
78 module:log("debug", "account not found for username '%s' at host '%s'", username, host);
79 return nil, "Auth failed. Invalid username";
80 end
81 return true;
82 end
83
84 function provider.create_user(username, password)
85 return nil, "User creation not supported";
86 end
87
88 function provider.delete_user(username)
89 return nil , "User deletion not supported";
90 end
91
92 function provider.get_sasl_handler()
93 return new_sasl(host, {
94 plain_test = function(sasl, username, password, realm)
95 return usermanager.test_password(username, realm, password), true;
96 end
97 });
98 end
99
100 module:provides("auth", provider);
101