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!

-- mod_c2s_limit_sessions

local next, count = next, require "util.iterators".count;

local max_resources = module:get_option_number("max_resources", 10);

local sessions = hosts[module.host].sessions;
module:hook("resource-bind", function(event)
	local session = event.session;
	if count(next, sessions[session.username].sessions) > max_resources then
		session:close{ condition = "policy-violation", text = "Too many resources" };
		return false
	end
end, -1);