prosody
64ddcbc9a328
util/id.lua

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Software / code / prosody

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util/id.lua @ 10360:64ddcbc9a328

core.stanza_router: Do strict jidprep on c2s Be conservative in what you let your clients send, be liberal in what you let in via s2s. Being strict on s2s leads to interop problems and poor experiences, ie users being ejected from MUCs if something invalid enters. By starting with tightening up input into the network, we may be able to gradually approach a point where no invalid JIDs are allowed.
author Kim Alvefur <zash@zash.se>
date Mon, 09 Sep 2019 22:32:01 +0200
parent 8016:9546c629289b
child 12110:b5b799a2a10c
line wrap: on
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-- Prosody IM
-- Copyright (C) 2008-2017 Matthew Wild
-- Copyright (C) 2008-2017 Waqas Hussain
-- Copyright (C) 2008-2017 Kim Alvefur
--
-- This project is MIT/X11 licensed. Please see the
-- COPYING file in the source package for more information.
--

local s_gsub = string.gsub;
local random_bytes = require "util.random".bytes;
local base64_encode = require "util.encodings".base64.encode;

local b64url = { ["+"] = "-", ["/"] = "_", ["="] = "" };
local function b64url_random(len)
	return (s_gsub(base64_encode(random_bytes(len)), "[+/=]", b64url));
end

return {
	short =  function () return b64url_random(6); end;
	medium = function () return b64url_random(12); end;
	long =   function () return b64url_random(24); end;
	custom = function (size)
		return function () return b64url_random(size); end;
	end;
}