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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!

module:depends("audit");
-- luacheck: read globals module.audit

module:hook("authentication-failure", function(event)
	local session = event.session;
	module:audit(session.sasl_handler.username, "authentication-failure", {
		session = session,
	});
end)

module:hook("authentication-success", function(event)
	local session = event.session;
	module:audit(session.sasl_handler.username, "authentication-success", {
		session = session,
	});
end)