prosody
a5d5fefb8b68
teal-src/module.d.tl

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teal-src/module.d.tl @ 13801:a5d5fefb8b68 13.0

mod_tls: Enable Prosody's certificate checking for incoming s2s connections (fixes #1916) (thanks Damian, Zash) Various options in Prosody allow control over the behaviour of the certificate verification process For example, some deployments choose to allow falling back to traditional "dialback" authentication (XEP-0220), while others verify via DANE, hard-coded fingerprints, or other custom plugins. Implementing this flexibility requires us to override OpenSSL's default certificate verification, to allow Prosody to verify the certificate itself, apply custom policies and make decisions based on the outcome. To enable our custom logic, we have to suppress OpenSSL's default behaviour of aborting the connection with a TLS alert message. With LuaSec, this can be achieved by using the verifyext "lsec_continue" flag. We also need to use the lsec_ignore_purpose flag, because XMPP s2s uses server certificates as "client" certificates (for mutual TLS verification in outgoing s2s connections). Commit 99d2100d2918 moved these settings out of the defaults and into mod_s2s, because we only really need these changes for s2s, and they should be opt-in, rather than automatically applied to all TLS services we offer. That commit was incomplete, because it only added the flags for incoming direct TLS connections. StartTLS connections are handled by mod_tls, which was not applying the lsec_* flags. It previously worked because they were already in the defaults. This resulted in incoming s2s connections with "invalid" certificates being aborted early by OpenSSL, even if settings such as `s2s_secure_auth = false` or DANE were present in the config. Outgoing s2s connections inherit verify "none" from the defaults, which means OpenSSL will receive the cert but will not terminate the connection when it is deemed invalid. This means we don't need lsec_continue there, and we also don't need lsec_ignore_purpose (because the remote peer is a "server"). Wondering why we can't just use verify "none" for incoming s2s? It's because in that mode, OpenSSL won't request a certificate from the peer for incoming connections. Setting verify "peer" is how you ask OpenSSL to request a certificate from the client, but also what triggers its built-in verification.
author Matthew Wild <mwild1@gmail.com>
date Tue, 01 Apr 2025 17:26:56 +0100
parent 13328:36284c879e2f
line wrap: on
line source

local st = require "prosody.util.stanza"

global record moduleapi
	get_name : function (moduleapi) : string
	get_host : function (moduleapi) : string
	enum host_type
		"global"
		"local"
		"component"
	end
	get_host_type : function (moduleapi) : host_type
	set_global : function (moduleapi)
	add_feature : function (moduleapi, string)
	add_identity : function (moduleapi, string, string, string) -- TODO enum?
	add_extension : function (moduleapi, st.stanza_t)
	fire_event : function (moduleapi, string, any) : any
	type handler = function (any) : any
	record util_events
		-- TODO import def
	end
	hook_object_event : function (moduleapi, util_events, string, handler, number)
	unhook_object_event : function (moduleapi, util_events, string, handler)
	hook : function (moduleapi, string, handler, number)
	hook_global : function (moduleapi, string, handler, number)
	hook_tag : function (moduleapi, string, string, handler, number)
	unhook : function (moduleapi, string, handler)
	wrap_object_event : function (moduleapi, util_events, string, handler)
	wrap_event : function (moduleapi, string, handler)
	wrap_global : function (moduleapi, string, handler)
	require : function (moduleapi, string) : table
	depends : function (moduleapi, string) : table
	shared : function (moduleapi, string) : table
	type config_getter = function<A> (moduleapi, string, A) : A
	get_option : config_getter<any>
	get_option_scalar : config_getter<nil | boolean | number | string>
	get_option_string : config_getter<string>
	get_option_number : function (moduleapi, string, number, number, number) : number
	get_option_integer : function (moduleapi, string, integer, integer, integer) : integer
	get_option_boolean : config_getter<boolean>
	get_option_enum : function<A> (moduleapi, string, ... : A) : A
	get_option_period : function (moduleapi, string|number, string|number, string|number, string|number) : number
	record util_array
		-- TODO import def
		{ any }
	end
	get_option_array : config_getter<util_array>
	record util_set
		-- TODO import def
		_items : { any : boolean }
	end
	get_option_set : function (moduleapi, string, { any }) : util_set
	get_option_inherited_set : function (moduleapi, string, { any }) : util_set
	get_option_path : function (moduleapi, string, string, string) : string
	context : function (moduleapi, string) : moduleapi
	add_item : function (moduleapi, string, any)
	remove_item : function (moduleapi, string, any)
	get_host_items : function (moduleapi, string) : { any }
	handle_items : function (moduleapi, string, handler, handler, boolean)
	provides : function (moduleapi, string, table)
	record util_session
		-- TODO import def
		send : function ( st.stanza_t | string )
	end
	send : function (moduleapi, st.stanza_t, util_session)
	send_iq : function (moduleapi, st.stanza_t, util_session, number)
	broadcast : function (moduleapi, { string }, st.stanza_t, function)
	type timer_callback = function (number, ... : any) : number
	record timer_wrapper
		stop : function (timer_wrapper)
		disarm : function (timer_wrapper)
		reschedule : function (timer_wrapper, number)
	end
	add_timer : function (moduleapi, number, timer_callback, ... : any) : timer_wrapper
	get_directory : function (moduleapi) : string
	enum file_mode
		"r" "w" "a" "r+" "w+" "a+"
	end
	load_resource : function (moduleapi, string, file_mode) : FILE
	enum store_type
		"keyval"
		"keyval+"
		"map"
		"archive"
	end
	open_store : function (moduleapi, string, store_type)
	enum stat_type
		"amount"
		"counter"
		"rate"
		"distribution"
		"sizes"
		"times"
	end
	record stats_conf
		initial : number
		units : string
		type : string
	end
	measure : function (moduleapi, string, stat_type, stats_conf)
	measure_object_event : function (moduleapi, util_events, string, string)
	measure_event : function (moduleapi, string, string)
	measure_global_event : function (moduleapi, string, string)
	enum status_type
		"error"
		"warn"
		"info"
		"core"
	end
	set_status : function (moduleapi, status_type, string, boolean)
	enum log_level
		"debug"
		"info"
		"warn"
		"error"
	end
	log_status : function (moduleapi, log_level, string, ... : any)
	get_status : function (moduleapi) : status_type, string, number

	-- added by modulemanager
	name : string
	host : string
	_log : function (log_level, string, ... : any)
	log : function (moduleapi, log_level, string, ... : any)
	reloading : boolean
	saved_state : any
	record module_environment
		module : moduleapi
	end
	environment : module_environment
	path : string
	resource_path : string

	-- access control
	may : function (moduleapi, string, table|string)
	default_permission : function (string, string)
	default_permissions : function (string, { string })

	-- methods the module can add
	load : function ()
	add_host : function (moduleapi)
	save : function () : any
	restore : function (any)
	unload : function ()

	-- added by mod_http
	http_url : function (moduleapi, string, string, string) : string
end

global module : moduleapi

global record common_event
	stanza : st.stanza_t
	record origin
		send : function (st.stanza_t)
	end
end

global record prosody
	version : string
end

return module