Mercurial > prosody-modules
view mod_host_guard/mod_host_guard.lua @ 5549:01a0b67a9afd
mod_http_oauth2: Add TODO about disabling password grant
Per recommendation in draft-ietf-oauth-security-topics-23 it should at
the very least be disabled by default.
However since this is used by the Snikket web portal some care needs to
be taken not to break this, unless it's already broken by other changes
to this module.
author | Kim Alvefur <zash@zash.se> |
---|---|
date | Fri, 16 Jun 2023 00:06:53 +0200 |
parents | 7dbde05b48a9 |
children |
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-- (C) 2011, Marco Cirillo (LW.Org) -- Block or restrict by blacklist remote access to local components or hosts. module:set_global() local hosts = hosts local incoming_s2s = prosody.incoming_s2s local guard_blockall = module:get_option_set("host_guard_blockall", {}) local guard_ball_wl = module:get_option_set("host_guard_blockall_exceptions", {}) local guard_protect = module:get_option_set("host_guard_selective", {}) local guard_block_bl = module:get_option_set("host_guard_blacklist", {}) local config = configmanager local error_reply = require "util.stanza".error_reply local tostring = tostring local function s2s_hook (event) local origin, stanza = event.session or event.origin, event.stanza or false local to_host, from_host = (not stanza and origin.to_host) or stanza.attr.to, (not stanza and origin.from_host) or stanza.attr.from if origin.type == "s2sin" or origin.type == "s2sin_unauthed" then if guard_blockall:contains(to_host) and not guard_ball_wl:contains(from_host) or guard_block_bl:contains(from_host) and guard_protect:contains(to_host) then module:log("error", "remote service %s attempted to access restricted host %s", from_host, to_host) origin:close({condition = "policy-violation", text = "You're not authorized, good bye."}) return false end end return nil end local function rr_hook (event) local from_host, to_host, send, stanza = event.from_host, event.to_host, (event.origin and event.origin.send) or function() end, event.stanza if guard_blockall:contains(from_host) and not guard_ball_wl:contains(to_host) or guard_block_bl:contains(to_host) and guard_protect:contains(from_host) then module:log("info", "attempted to connect to a filtered remote host %s", to_host) if stanza.attr.type ~= "error" then send(error_reply(event.stanza, "cancel", "policy-violation", "Communicating with a filtered remote server is not allowed.")) end return true end return nil end local function handle_activation (host, u) if guard_blockall:contains(host) or guard_protect:contains(host) then if hosts[host] and config.get(host, "core", "authentication") ~= "anonymous" then hosts[host].events.add_handler("s2sin-established", s2s_hook, 500) hosts[host].events.add_handler("route/remote", rr_hook, 500) hosts[host].events.add_handler("stanza/jabber:server:dialback:result", s2s_hook, 500) if not u then module:log ("debug", "adding host protection for: "..host) else module:log ("debug", "updating or adding host protection for: "..host) end end end end local function handle_deactivation (host, u, i) if guard_blockall:contains(host) or guard_protect:contains(host) then if hosts[host] and config.get(host, "core", "authentication") ~= "anonymous" then hosts[host].events.remove_handler("s2sin-established", s2s_hook) hosts[host].events.remove_handler("route/remote", rr_hook) hosts[host].events.remove_handler("stanza/jabber:server:dialback:result", s2s_hook) if not u and not i then module:log ("debug", "removing host protection for: "..host) end end end end local function close_filtered() for _, host in pairs(hosts) do for name, session in pairs(host.s2sout) do if guard_blockall:contains(session.host) and not guard_ball_wl:contains(session.to_host) or guard_block_bl:contains(session.to_host) and guard_protect:contains(session.host) then module:log("info", "closing down s2s outgoing stream to filtered entity %s", tostring(session.to_host)) session:close() end end end for session in pairs(incoming_s2s) do if session.to_host and session.from_host and (guard_blockall:contains(session.to_host) and not guard_ball_wl:contains(session.from_host) or guard_block_bl:contains(session.from_host) and guard_protect:contains(session.to_host)) then module:log("info", "closing down s2s incoming stream from filtered entity %s", tostring(session.from_host)) session:close() end end end local function init_hosts(u, i) for n in pairs(hosts) do if guard_blockall:contains(n) or guard_protect:contains(n) then handle_deactivation(n, u, i) ; handle_activation(n, u) end end close_filtered() end local function reload() module:log ("debug", "server configuration reloaded, rehashing plugin tables...") guard_blockall = module:get_option_set("host_guard_blockall", {}) guard_ball_wl = module:get_option_set("host_guard_blockall_exceptions", {}) guard_protect = module:get_option_set("host_guard_selective", {}) guard_block_bl = module:get_option_set("host_guard_blacklist", {}) init_hosts(true) end local function setup() module:log ("debug", "initializing host guard module...") module:hook ("host-activated", handle_activation) module:hook ("host-deactivated", handle_deactivation) module:hook ("config-reloaded", reload) init_hosts(false, true) end function module.unload() module:log ("debug", "removing host handlers as module is being unloaded...") for n in pairs(hosts) do hosts[n].events.remove_handler("s2sin-established", s2s_hook) hosts[n].events.remove_handler("route/remote", rr_hook) hosts[n].events.remove_handler("stanza/jabber:server:dialback:result", s2s_hook) end end if prosody.start_time then setup() else module:hook ("server-started", setup) end