diff mod_http_oauth2/mod_http_oauth2.lua @ 5518:d87d0e4a8516

mod_http_oauth2: Validate the OpenID 'prompt' parameter Without support for affecting the login and consent procedure, it seems sensible to inform the client that they can't change anything with this parameter.
author Kim Alvefur <zash@zash.se>
date Mon, 05 Jun 2023 22:19:17 +0200
parents 61b8d3eb91a4
children 83ebfc367169
line wrap: on
line diff
--- a/mod_http_oauth2/mod_http_oauth2.lua	Sat Jun 03 20:04:40 2023 +0200
+++ b/mod_http_oauth2/mod_http_oauth2.lua	Mon Jun 05 22:19:17 2023 +0200
@@ -776,6 +776,25 @@
 		end);
 	end
 
+	-- The 'prompt' parameter from OpenID Core
+	local prompt = set.new(parse_scopes(params.prompt or "select_account login consent"));
+	if prompt:contains("none") then
+		-- Client wants no interaction, only confirmation of prior login and
+		-- consent, but this is not implemented.
+		return error_response(request, redirect_uri, oauth_error("interaction_required"));
+	elseif not prompt:contains("select_account") then
+		-- TODO If the login page is split into account selection followed by login
+		-- (e.g. password), and then the account selection could be skipped iff the
+		-- 'login_hint' parameter is present.
+		return error_response(request, redirect_uri, oauth_error("account_selection_required"));
+	elseif not prompt:contains("login") then
+		-- Currently no cookies or such are used, so login is required every time.
+		return error_response(request, redirect_uri, oauth_error("login_required"));
+	elseif not prompt:contains("consent") then
+		-- Are there any circumstances when consent would be implied or assumed?
+		return error_response(request, redirect_uri, oauth_error("consent_required"));
+	end
+
 	local auth_state = get_auth_state(request);
 	if not auth_state.user then
 		-- Render login page