prosody-modules
2bb29ece216b
mod_auto_accept_subscriptions/mod_auto_accept_subscriptions.lua

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mod_auto_accept_subscriptions/mod_auto_accept_subscriptions.lua @ 5193:2bb29ece216b

mod_http_oauth2: Implement stateless dynamic client registration Replaces previous explicit registration that required either the additional module mod_adhoc_oauth2_client or manually editing the database. That method was enough to have something to test with, but would not probably not scale easily. Dynamic client registration allows creating clients on the fly, which may be even easier in theory. In order to not allow basically unauthenticated writes to the database, we implement a stateless model here. per_host_key := HMAC(config -> oauth2_registration_key, hostname) client_id := JWT { client metadata } signed with per_host_key client_secret := HMAC(per_host_key, client_id) This should ensure everything we need to know is part of the client_id, allowing redirects etc to be validated, and the client_secret can be validated with only the client_id and the per_host_key. A nonce injected into the client_id JWT should ensure nobody can submit the same client metadata and retrieve the same client_secret
author Kim Alvefur <zash@zash.se>
date Fri, 03 Mar 2023 21:14:19 +0100
parent 1949:6d2ec330fbcf
line wrap: on
line source

local rostermanager = require "core.rostermanager";
local jid = require "util.jid";
local st = require "util.stanza";
local core_post_stanza = prosody.core_post_stanza;

local function handle_inbound_subscription_request(origin, stanza)
	local to_bare, from_bare = jid.bare(stanza.attr.to), jid.bare(stanza.attr.from);
	local node, host = jid.split(to_bare);
	stanza.attr.from, stanza.attr.to = from_bare, to_bare;
	module:log("info", "Auto-accepting inbound subscription request from %s to %s", tostring(from_bare), tostring(to_bare));

	if not rostermanager.is_contact_subscribed(node, host, from_bare) then
		core_post_stanza(hosts[host], st.presence({from=to_bare, to=from_bare, type="unavailable"}), true); -- acknowledging receipt
		module:log("debug", "receipt acknowledged");
		if rostermanager.set_contact_pending_in(node, host, from_bare) then
			module:log("debug", "set pending in");
			if rostermanager.subscribed(node, host, from_bare) then
				module:log("debug", "set subscribed");
				rostermanager.roster_push(node, host, to_bare);
				module:log("debug", "pushed roster item");
				local subscribed_stanza = st.reply(stanza);
				subscribed_stanza.attr.type = "subscribed";
				core_post_stanza(hosts[host], subscribed_stanza);
				module:log("debug", "sent subscribed");
				hosts[host].modules.presence.send_presence_of_available_resources(node, host, to_bare, origin);
				module:log("debug", "sent available presence of all resources");
				-- Add return subscription from user to contact
				local subscribe_stanza = st.reply(stanza);
				subscribe_stanza.attr.type = "subscribe";
				if rostermanager.set_contact_pending_out(node, host, from_bare) then
					rostermanager.roster_push(node, host, from_bare);
				end
				core_post_stanza(hosts[host], subscribe_stanza);
				return true;
			end
		end
	end
	module:log("warn", "Failed to auto-accept subscription request from %s to %s", tostring(from_bare), tostring(to_bare));
end

module:hook("presence/bare", function (event)
	local stanza = event.stanza;
	if stanza.attr.type == "subscribe" then
		handle_inbound_subscription_request(event.origin, stanza);
		return true;
	end
end, 0.1);