Mercurial > prosody-modules
annotate mod_limit_auth/mod_limit_auth.lua @ 5401:c8d04ac200fc
mod_http_oauth2: Reject loopback URIs as client_uri
This really should be a proper website with info, https://localhost is
not good enough. Ideally we'd validate that it's got proper DNS and is
actually reachable, but triggering HTTP or even DNS lookups seems like
it would carry abuse potential that would best to avoid.
author | Kim Alvefur <zash@zash.se> |
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date | Tue, 02 May 2023 16:20:55 +0200 |
parents | 2a5a44d5b935 |
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1583
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1 -- mod_limit_auth |
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2 |
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3 local st = require"util.stanza"; |
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4 local new_throttle = require "util.throttle".create; |
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5 |
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6 local period = math.max(module:get_option_number(module.name.."_period", 30), 0); |
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7 local max = math.max(module:get_option_number(module.name.."_max", 5), 1); |
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8 |
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9 local tarpit_delay = module:get_option_number(module.name.."_tarpit_delay", nil); |
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10 if tarpit_delay then |
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11 local waiter = require "util.async".waiter; |
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12 local delay = tarpit_delay; |
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13 function tarpit_delay() |
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14 local wait, done = waiter(); |
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15 module:add_timer(delay, done); |
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16 wait(); |
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17 end |
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18 else |
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19 function tarpit_delay() end |
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20 end |
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21 |
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22 local throttles = module:shared"throttles"; |
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23 |
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24 local reply = st.stanza("failure", { xmlns = "urn:ietf:params:xml:ns:xmpp-sasl" }):tag("temporary-auth-failure"); |
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25 |
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26 local function get_throttle(ip) |
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27 local throttle = throttles[ip]; |
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28 if not throttle then |
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29 throttle = new_throttle(max, period); |
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30 throttles[ip] = throttle; |
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31 end |
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32 return throttle; |
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33 end |
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34 |
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35 module:hook("stanza/urn:ietf:params:xml:ns:xmpp-sasl:auth", function (event) |
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36 local origin = event.origin; |
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37 if origin.type ~= "c2s_unauthed" then return end |
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38 if not get_throttle(origin.ip):peek(1) then |
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39 origin.log("warn", "Too many authentication attepmts for ip %s", origin.ip); |
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40 tarpit_delay(); |
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41 origin.send(reply); |
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42 return true; |
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43 end |
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44 end, 10); |
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45 |
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46 module:hook("authentication-failure", function (event) |
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47 get_throttle(event.session.ip):poll(1); |
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48 end); |
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49 |
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50 module:add_timer(14400, function (now) |
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51 local old = now - 86400; |
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52 for ip, throttle in pairs(throttles) do |
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53 if throttle.t < old then |
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54 throttles[ip] = nil; |
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55 end |
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56 end |
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57 end); |
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58 |