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comparison mod_block_registrations/mod_block_registrations.lua @ 1053:cabbcc1997d9

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mod_block_registrations: Allow restricting registrations of certain user accounts, and/or ensure that registered accounts conform to a given pattern
author Matthew Wild <mwild1@gmail.com>
date Thu, 06 Jun 2013 15:52:36 +0100
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children dbaa67babeb4
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1052:80f0a3231c59 1053:cabbcc1997d9
1 local st = require "util.stanza";
2 local nodeprep = require "util.encodings".stringprep.nodeprep;
3
4 local block_users = module:get_option_set("block_registrations_users", { "admin" });
5 local block_patterns = module:get_option_set("block_registrations_matching", {});
6 local require_pattern = module:get_option_string("block_registrations_require");
7
8 function is_blocked(username)
9 -- Check if the username is simply blocked
10 if block_users:contains(username) then return true; end
11
12 for pattern in block_patterns do
13 if username:match(pattern) then
14 return true;
15 end
16 end
17 -- Not blocked, but check that username matches allowed pattern
18 if require_pattern and not username:match(require_pattern) then
19 return true;
20 end
21 end
22
23 module:hook("stanza/iq/jabber:iq:register:query", function(event)
24 local session, stanza = event.origin, event.stanza;
25
26 if stanza.attr.type == "set" then
27 local query = stanza.tags[1];
28 local username = nodeprep(query:get_child_text("username"));
29 if username and is_blocked(username) then
30 session.send(st.error_reply(stanza, "modify", "policy-violation", "Username is blocked"));
31 return true;
32 end
33 end
34 end, 10);