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 bytes = module:measure("bytes", "sizes");
local lines = module:measure("lines", "distribution");
local words = module:measure("words", "distribution");

local function measure_length(event)
	local body = event.stanza:get_child_text("body");
	if body then
		bytes(#body);
		lines(select(2, body:gsub("[^\n]+","")));
		words(select(2, body:gsub("%S+","")));
	end
end

module:hook("message/full", measure_length);
module:hook("message/bare", measure_length);
module:hook("message/host", measure_length);

module:hook("pre-message/full", measure_length);
module:hook("pre-message/bare", measure_length);
module:hook("pre-message/host", measure_length);