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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!

local json = require "util.json"

module:depends("http")
module:provides("http", {
		route = {
			GET = function(event)
				local request = event.request;
				return {
					status_code = 200;
					headers = {
						content_type = "application/json",
					},
					body = json.encode {
						body = request.body;
						headers = request.headers;
						httpversion = request.httpversion;
						ip = request.ip;
						method = request.method;
						path = request.path;
						secure = request.secure;
						url = request.url;
					}
				}
			end;
		}
	})