view mod_auth_custom_http/mod_auth_custom_http.lua @ 5193:2bb29ece216b

mod_http_oauth2: Implement stateless dynamic client registration Replaces previous explicit registration that required either the additional module mod_adhoc_oauth2_client or manually editing the database. That method was enough to have something to test with, but would not probably not scale easily. Dynamic client registration allows creating clients on the fly, which may be even easier in theory. In order to not allow basically unauthenticated writes to the database, we implement a stateless model here. per_host_key := HMAC(config -> oauth2_registration_key, hostname) client_id := JWT { client metadata } signed with per_host_key client_secret := HMAC(per_host_key, client_id) This should ensure everything we need to know is part of the client_id, allowing redirects etc to be validated, and the client_secret can be validated with only the client_id and the per_host_key. A nonce injected into the client_id JWT should ensure nobody can submit the same client metadata and retrieve the same client_secret
author Kim Alvefur <zash@zash.se>
date Fri, 03 Mar 2023 21:14:19 +0100
parents 32d7f05e062f
children
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-- Prosody IM
-- Copyright (C) 2008-2010 Waqas Hussain
--
-- This project is MIT/X11 licensed. Please see the
-- COPYING file in the source package for more information.
--

local new_sasl = require "util.sasl".new;
local json = require "util.json";
prosody.unlock_globals();
local http = require "socket.http";
prosody.lock_globals();

local options = module:get_option("auth_custom_http");
local post_url = options and options.post_url;
assert(post_url, "No HTTP POST URL provided");

local provider = {};

function provider.test_password(username, password)
	return nil, "Not supported"
end

function provider.get_password(username)
	return nil, "Not supported"
end

function provider.set_password(username, password)
	return nil, "Not supported"
end

function provider.user_exists(username)
	return true;
end

function provider.create_user(username, password)
	return nil, "Not supported"
end

function provider.delete_user(username)
	return nil, "Not supported"
end

function provider.get_sasl_handler()
	local getpass_authentication_profile = {
		plain_test = function(sasl, username, password, realm)
			local postdata = json.encode({ username = username, password = password });
			local result = http.request(post_url, postdata);
			return result == "true", true;
		end,
	};
	return new_sasl(module.host, getpass_authentication_profile);
end


module:provides("auth", provider);