Mercurial > prosody-modules
view mod_limit_auth/mod_limit_auth.lua @ 5616:59d5fc50f602
mod_http_oauth2: Implement refresh token rotation
Makes refresh tokens one-time-use, handing out a new refresh token with
each access token. Thus if a refresh token is stolen and used by an
attacker, the next time the legitimate client tries to use the previous
refresh token, it will not work and the attack will be noticed. If the
attacker does not use the refresh token, it becomes invalid after the
legitimate client uses it.
This behavior is recommended by draft-ietf-oauth-security-topics
author | Kim Alvefur <zash@zash.se> |
---|---|
date | Sun, 23 Jul 2023 02:56:08 +0200 |
parents | 2a5a44d5b935 |
children |
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-- mod_limit_auth local st = require"util.stanza"; local new_throttle = require "util.throttle".create; local period = math.max(module:get_option_number(module.name.."_period", 30), 0); local max = math.max(module:get_option_number(module.name.."_max", 5), 1); local tarpit_delay = module:get_option_number(module.name.."_tarpit_delay", nil); if tarpit_delay then local waiter = require "util.async".waiter; local delay = tarpit_delay; function tarpit_delay() local wait, done = waiter(); module:add_timer(delay, done); wait(); end else function tarpit_delay() end end local throttles = module:shared"throttles"; local reply = st.stanza("failure", { xmlns = "urn:ietf:params:xml:ns:xmpp-sasl" }):tag("temporary-auth-failure"); local function get_throttle(ip) local throttle = throttles[ip]; if not throttle then throttle = new_throttle(max, period); throttles[ip] = throttle; end return throttle; end module:hook("stanza/urn:ietf:params:xml:ns:xmpp-sasl:auth", function (event) local origin = event.origin; if origin.type ~= "c2s_unauthed" then return end if not get_throttle(origin.ip):peek(1) then origin.log("warn", "Too many authentication attepmts for ip %s", origin.ip); tarpit_delay(); origin.send(reply); return true; end end, 10); module:hook("authentication-failure", function (event) get_throttle(event.session.ip):poll(1); end); module:add_timer(14400, function (now) local old = now - 86400; for ip, throttle in pairs(throttles) do if throttle.t < old then throttles[ip] = nil; end end end);