1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
|
-- Prosody IM
-- Copyright (C) 2012 Florian Zeitz
-- Copyright (C) 2019 Kim Alvefur
--
-- This project is MIT/X11 licensed. Please see the
-- COPYING file in the source package for more information.
--
local encodings = require "prosody.util.encodings";
assert(encodings.confusable, "This module requires that Prosody be built with ICU");
local skeleton = encodings.confusable.skeleton;
local usage = require "prosody.util.prosodyctl".show_usage;
local usermanager = require "prosody.core.usermanager";
local storagemanager = require "prosody.core.storagemanager";
local skeletons
function module.load()
if module.host ~= "*" then
skeletons = module:open_store("skeletons");
end
end
module:hook("user-registered", function(user)
local skel = skeleton(user.username);
local ok, err = skeletons:set(skel, { username = user.username });
if not ok then
module:log("error", "Unable to store mimicry data (%q => %q): %s", user.username, skel, err);
end
end);
module:hook_global("user-deleted", function(user)
if user.host ~= module.host then return end
local skel = skeleton(user.username);
local ok, err = skeletons:set(skel, nil);
if not ok and err then
module:log("error", "Unable to clear mimicry data (%q): %s", skel, err);
end
end);
module:hook("user-registering", function(user)
local existing, err = skeletons:get(skeleton(user.username));
if existing then
module:log("debug", "Attempt to register username '%s' which could be confused with '%s'", user.username, existing.username);
user.allowed = false;
elseif err then
module:log("error", "Unable to check if new username '%s' can be confused with any existing user: %s", err);
end
end);
function module.command(arg)
if (arg[1] ~= "bootstrap" or not arg[2]) then
usage("mod_mimicking bootstrap <host>", "Initialize username mimicry database");
return;
end
local host = arg[2];
local host_session = prosody.hosts[host];
if not host_session then
return "No such host";
end
storagemanager.initialize_host(host);
usermanager.initialize_host(host);
skeletons = storagemanager.open(host, "skeletons");
local count = 0;
for user in usermanager.users(host) do
local skel = skeleton(user);
local existing, err = skeletons:get(skel);
if existing and existing.username ~= user then
module:log("warn", "Existing usernames '%s' and '%s' are confusable", existing.username, user);
elseif err then
module:log("error", "Error checking for existing mimicry data (%q = %q): %s", user, skel, err);
end
local ok, err = skeletons:set(skel, { username = user });
if ok then
count = count + 1;
elseif err then
module:log("error", "Unable to store mimicry data (%q => %q): %s", user, skel, err);
end
end
module:log("info", "%d usernames indexed", count);
end
|
