prosody-modules
e79f9dec35c0
mod_limit_auth/mod_limit_auth.lua

Find changesets by keywords by author, files, the commit message, revision number or hash, or revset expression.

Software / code / prosody-modules

Annotate

mod_limit_auth/mod_limit_auth.lua @ 5810:e79f9dec35c0

mod_c2s_conn_throttle: Reduce log level from error->info Our general policy is that "error" should never be triggerable by remote entities, and that it is always about something that requires admin intervention. This satisfies neither condition. The "warn" level can be used for unexpected events/behaviour triggered by remote entities, and this could qualify. However I don't think failed auth attempts are unexpected enough. I selected "info" because it is what is also used for other notable session lifecycle events.
author Matthew Wild <mwild1@gmail.com>
date Thu, 07 Dec 2023 15:46:50 +0000
parent 1941:2a5a44d5b935
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
1583
c1bb2a64aabb mod_limit_auth: Throttle authentication (failed) attempts with optional (0.10+) tarpit
Kim Alvefur <zash@zash.se>
parents:
diff changeset
1 -- mod_limit_auth
c1bb2a64aabb mod_limit_auth: Throttle authentication (failed) attempts with optional (0.10+) tarpit
Kim Alvefur <zash@zash.se>
parents:
diff changeset
2
c1bb2a64aabb mod_limit_auth: Throttle authentication (failed) attempts with optional (0.10+) tarpit
Kim Alvefur <zash@zash.se>
parents:
diff changeset
3 local st = require"util.stanza";
c1bb2a64aabb mod_limit_auth: Throttle authentication (failed) attempts with optional (0.10+) tarpit
Kim Alvefur <zash@zash.se>
parents:
diff changeset
4 local new_throttle = require "util.throttle".create;
c1bb2a64aabb mod_limit_auth: Throttle authentication (failed) attempts with optional (0.10+) tarpit
Kim Alvefur <zash@zash.se>
parents:
diff changeset
5
c1bb2a64aabb mod_limit_auth: Throttle authentication (failed) attempts with optional (0.10+) tarpit
Kim Alvefur <zash@zash.se>
parents:
diff changeset
6 local period = math.max(module:get_option_number(module.name.."_period", 30), 0);
c1bb2a64aabb mod_limit_auth: Throttle authentication (failed) attempts with optional (0.10+) tarpit
Kim Alvefur <zash@zash.se>
parents:
diff changeset
7 local max = math.max(module:get_option_number(module.name.."_max", 5), 1);
c1bb2a64aabb mod_limit_auth: Throttle authentication (failed) attempts with optional (0.10+) tarpit
Kim Alvefur <zash@zash.se>
parents:
diff changeset
8
c1bb2a64aabb mod_limit_auth: Throttle authentication (failed) attempts with optional (0.10+) tarpit
Kim Alvefur <zash@zash.se>
parents:
diff changeset
9 local tarpit_delay = module:get_option_number(module.name.."_tarpit_delay", nil);
c1bb2a64aabb mod_limit_auth: Throttle authentication (failed) attempts with optional (0.10+) tarpit
Kim Alvefur <zash@zash.se>
parents:
diff changeset
10 if tarpit_delay then
c1bb2a64aabb mod_limit_auth: Throttle authentication (failed) attempts with optional (0.10+) tarpit
Kim Alvefur <zash@zash.se>
parents:
diff changeset
11 local waiter = require "util.async".waiter;
c1bb2a64aabb mod_limit_auth: Throttle authentication (failed) attempts with optional (0.10+) tarpit
Kim Alvefur <zash@zash.se>
parents:
diff changeset
12 local delay = tarpit_delay;
c1bb2a64aabb mod_limit_auth: Throttle authentication (failed) attempts with optional (0.10+) tarpit
Kim Alvefur <zash@zash.se>
parents:
diff changeset
13 function tarpit_delay()
c1bb2a64aabb mod_limit_auth: Throttle authentication (failed) attempts with optional (0.10+) tarpit
Kim Alvefur <zash@zash.se>
parents:
diff changeset
14 local wait, done = waiter();
c1bb2a64aabb mod_limit_auth: Throttle authentication (failed) attempts with optional (0.10+) tarpit
Kim Alvefur <zash@zash.se>
parents:
diff changeset
15 module:add_timer(delay, done);
c1bb2a64aabb mod_limit_auth: Throttle authentication (failed) attempts with optional (0.10+) tarpit
Kim Alvefur <zash@zash.se>
parents:
diff changeset
16 wait();
c1bb2a64aabb mod_limit_auth: Throttle authentication (failed) attempts with optional (0.10+) tarpit
Kim Alvefur <zash@zash.se>
parents:
diff changeset
17 end
c1bb2a64aabb mod_limit_auth: Throttle authentication (failed) attempts with optional (0.10+) tarpit
Kim Alvefur <zash@zash.se>
parents:
diff changeset
18 else
c1bb2a64aabb mod_limit_auth: Throttle authentication (failed) attempts with optional (0.10+) tarpit
Kim Alvefur <zash@zash.se>
parents:
diff changeset
19 function tarpit_delay() end
c1bb2a64aabb mod_limit_auth: Throttle authentication (failed) attempts with optional (0.10+) tarpit
Kim Alvefur <zash@zash.se>
parents:
diff changeset
20 end
c1bb2a64aabb mod_limit_auth: Throttle authentication (failed) attempts with optional (0.10+) tarpit
Kim Alvefur <zash@zash.se>
parents:
diff changeset
21
c1bb2a64aabb mod_limit_auth: Throttle authentication (failed) attempts with optional (0.10+) tarpit
Kim Alvefur <zash@zash.se>
parents:
diff changeset
22 local throttles = module:shared"throttles";
c1bb2a64aabb mod_limit_auth: Throttle authentication (failed) attempts with optional (0.10+) tarpit
Kim Alvefur <zash@zash.se>
parents:
diff changeset
23
c1bb2a64aabb mod_limit_auth: Throttle authentication (failed) attempts with optional (0.10+) tarpit
Kim Alvefur <zash@zash.se>
parents:
diff changeset
24 local reply = st.stanza("failure", { xmlns = "urn:ietf:params:xml:ns:xmpp-sasl" }):tag("temporary-auth-failure");
c1bb2a64aabb mod_limit_auth: Throttle authentication (failed) attempts with optional (0.10+) tarpit
Kim Alvefur <zash@zash.se>
parents:
diff changeset
25
c1bb2a64aabb mod_limit_auth: Throttle authentication (failed) attempts with optional (0.10+) tarpit
Kim Alvefur <zash@zash.se>
parents:
diff changeset
26 local function get_throttle(ip)
c1bb2a64aabb mod_limit_auth: Throttle authentication (failed) attempts with optional (0.10+) tarpit
Kim Alvefur <zash@zash.se>
parents:
diff changeset
27 local throttle = throttles[ip];
c1bb2a64aabb mod_limit_auth: Throttle authentication (failed) attempts with optional (0.10+) tarpit
Kim Alvefur <zash@zash.se>
parents:
diff changeset
28 if not throttle then
c1bb2a64aabb mod_limit_auth: Throttle authentication (failed) attempts with optional (0.10+) tarpit
Kim Alvefur <zash@zash.se>
parents:
diff changeset
29 throttle = new_throttle(max, period);
c1bb2a64aabb mod_limit_auth: Throttle authentication (failed) attempts with optional (0.10+) tarpit
Kim Alvefur <zash@zash.se>
parents:
diff changeset
30 throttles[ip] = throttle;
c1bb2a64aabb mod_limit_auth: Throttle authentication (failed) attempts with optional (0.10+) tarpit
Kim Alvefur <zash@zash.se>
parents:
diff changeset
31 end
c1bb2a64aabb mod_limit_auth: Throttle authentication (failed) attempts with optional (0.10+) tarpit
Kim Alvefur <zash@zash.se>
parents:
diff changeset
32 return throttle;
c1bb2a64aabb mod_limit_auth: Throttle authentication (failed) attempts with optional (0.10+) tarpit
Kim Alvefur <zash@zash.se>
parents:
diff changeset
33 end
c1bb2a64aabb mod_limit_auth: Throttle authentication (failed) attempts with optional (0.10+) tarpit
Kim Alvefur <zash@zash.se>
parents:
diff changeset
34
c1bb2a64aabb mod_limit_auth: Throttle authentication (failed) attempts with optional (0.10+) tarpit
Kim Alvefur <zash@zash.se>
parents:
diff changeset
35 module:hook("stanza/urn:ietf:params:xml:ns:xmpp-sasl:auth", function (event)
c1bb2a64aabb mod_limit_auth: Throttle authentication (failed) attempts with optional (0.10+) tarpit
Kim Alvefur <zash@zash.se>
parents:
diff changeset
36 local origin = event.origin;
1941
2a5a44d5b935 mod_limit_auth: Only apply limit to normal c2s sessions (thanks cuc)
Kim Alvefur <zash@zash.se>
parents: 1854
diff changeset
37 if origin.type ~= "c2s_unauthed" then return end
1583
c1bb2a64aabb mod_limit_auth: Throttle authentication (failed) attempts with optional (0.10+) tarpit
Kim Alvefur <zash@zash.se>
parents:
diff changeset
38 if not get_throttle(origin.ip):peek(1) then
c1bb2a64aabb mod_limit_auth: Throttle authentication (failed) attempts with optional (0.10+) tarpit
Kim Alvefur <zash@zash.se>
parents:
diff changeset
39 origin.log("warn", "Too many authentication attepmts for ip %s", origin.ip);
c1bb2a64aabb mod_limit_auth: Throttle authentication (failed) attempts with optional (0.10+) tarpit
Kim Alvefur <zash@zash.se>
parents:
diff changeset
40 tarpit_delay();
c1bb2a64aabb mod_limit_auth: Throttle authentication (failed) attempts with optional (0.10+) tarpit
Kim Alvefur <zash@zash.se>
parents:
diff changeset
41 origin.send(reply);
c1bb2a64aabb mod_limit_auth: Throttle authentication (failed) attempts with optional (0.10+) tarpit
Kim Alvefur <zash@zash.se>
parents:
diff changeset
42 return true;
c1bb2a64aabb mod_limit_auth: Throttle authentication (failed) attempts with optional (0.10+) tarpit
Kim Alvefur <zash@zash.se>
parents:
diff changeset
43 end
c1bb2a64aabb mod_limit_auth: Throttle authentication (failed) attempts with optional (0.10+) tarpit
Kim Alvefur <zash@zash.se>
parents:
diff changeset
44 end, 10);
c1bb2a64aabb mod_limit_auth: Throttle authentication (failed) attempts with optional (0.10+) tarpit
Kim Alvefur <zash@zash.se>
parents:
diff changeset
45
c1bb2a64aabb mod_limit_auth: Throttle authentication (failed) attempts with optional (0.10+) tarpit
Kim Alvefur <zash@zash.se>
parents:
diff changeset
46 module:hook("authentication-failure", function (event)
c1bb2a64aabb mod_limit_auth: Throttle authentication (failed) attempts with optional (0.10+) tarpit
Kim Alvefur <zash@zash.se>
parents:
diff changeset
47 get_throttle(event.session.ip):poll(1);
c1bb2a64aabb mod_limit_auth: Throttle authentication (failed) attempts with optional (0.10+) tarpit
Kim Alvefur <zash@zash.se>
parents:
diff changeset
48 end);
c1bb2a64aabb mod_limit_auth: Throttle authentication (failed) attempts with optional (0.10+) tarpit
Kim Alvefur <zash@zash.se>
parents:
diff changeset
49
1854
450ada5bb1b5 mod_limit_auth: Get rid of old inactive throttle objects
Kim Alvefur <zash@zash.se>
parents: 1583
diff changeset
50 module:add_timer(14400, function (now)
450ada5bb1b5 mod_limit_auth: Get rid of old inactive throttle objects
Kim Alvefur <zash@zash.se>
parents: 1583
diff changeset
51 local old = now - 86400;
450ada5bb1b5 mod_limit_auth: Get rid of old inactive throttle objects
Kim Alvefur <zash@zash.se>
parents: 1583
diff changeset
52 for ip, throttle in pairs(throttles) do
450ada5bb1b5 mod_limit_auth: Get rid of old inactive throttle objects
Kim Alvefur <zash@zash.se>
parents: 1583
diff changeset
53 if throttle.t < old then
450ada5bb1b5 mod_limit_auth: Get rid of old inactive throttle objects
Kim Alvefur <zash@zash.se>
parents: 1583
diff changeset
54 throttles[ip] = nil;
450ada5bb1b5 mod_limit_auth: Get rid of old inactive throttle objects
Kim Alvefur <zash@zash.se>
parents: 1583
diff changeset
55 end
450ada5bb1b5 mod_limit_auth: Get rid of old inactive throttle objects
Kim Alvefur <zash@zash.se>
parents: 1583
diff changeset
56 end
450ada5bb1b5 mod_limit_auth: Get rid of old inactive throttle objects
Kim Alvefur <zash@zash.se>
parents: 1583
diff changeset
57 end);
450ada5bb1b5 mod_limit_auth: Get rid of old inactive throttle objects
Kim Alvefur <zash@zash.se>
parents: 1583
diff changeset
58