mod_http_oauth2: Advertise the currently supported id_token signing algorithm This field is REQUIRED. The algorithm RS256 MUST be included, but isn't because we don't implement it, as that would require implementing a pile of additional cryptography and JWT stuff. Instead the id_token is signed using the client secret, which allows verification by the client, since it's a shared secret per OpenID Connect Core 1.0 § 10.1 under Symmetric Signatures. OpenID Connect Discovery 1.0 has a lot of REQUIRED and MUST clauses that are not supported here, but that's okay because this is served from the RFC 8414 OAuth 2.0 Authorization Server Metadata .well-known endpoint!

local st = require"util.stanza";
local datetime = require"util.datetime";

local presence = st.presence({ from = module.host })
	:tag("delay", { xmlns = "urn:xmpp:delay",
		stamp = datetime.datetime(prosody.start_time) });

module:hook("presence/host", function(event)
	local stanza = event.stanza;
	if stanza.attr.type == "probe" then
		presence.attr.id = stanza.attr.id;
		presence.attr.to = stanza.attr.from;
		module:send(presence);
		return true;
	end
end, 10);