view mod_isr/mod_isr.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 1cb762f72a91
children
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local st = require "util.stanza";

local mod_smacks = module:depends("smacks");

local xmlns_sasl2 = "urn:xmpp:sasl:1";
local xmlns_sm = "urn:xmpp:sm:3";
local xmlns_isr = "https://xmpp.org/extensions/isr/0";
local xmlns_errors = "urn:ietf:params:xml:ns:xmpp-stanzas";

module:hook_tag(xmlns_sasl2, "authenticate", function (session, auth)
	local isr_resume = auth:get_child("inst-resume", xmlns_isr);
	if not isr_resume then return end
	local is_using_token = isr_resume.attr["with-isr-token"] ~= "false";
	if is_using_token then
		-- TODO: If authing with token, set session.sasl_handler to our own
		-- event.session.sasl_handler = ...
		error("not yet implemented");
	end

	-- Cache resume element for future processing after SASL success
	session.isr_sm_resume = isr_resume:get_child("resume", "urn:xmpp:sm:3");
end, 100);

module:hook("sasl2/c2s/success", function (event)
	local session = event.session;
	local sm_resume = session.isr_sm_resume;
	if sm_resume then
		session.isr_sm_resume = nil;
		local resumed, err = mod_smacks.do_resume(session, sm_resume);
		if not resumed then
			local failed = st.stanza("failed", { xmlns = xmlns_sm, h = ("%d"):format(err.context.h) })
				:tag(err.condition, { xmlns = xmlns_errors });
			event.success:add_child(failed);
		else
			event.session = resumed.session;
			event.isr_resumed = resumed;
			event.success:tag("resumed", { xmlns = xmlns_sm,
				h = ("%d"):format(event.session.handled_stanza_count);
				previd = resumed.id; }):up();
		end
	end
end, 100);

module:hook("sasl2/c2s/success", function (event)
	-- The authenticate response has already been sent at this point
	local resumed = event.isr_resumed;
	if resumed then
		resumed.finish(); -- Finish resume and sync stanzas
	end
end, -1100);

module:hook("sasl2/c2s/failure", function (event)
	event.session.isr_sm_resume = nil;
end);