prosody
5c2ae28f536e
util/uuid.lua

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Software / code / prosody

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util/uuid.lua @ 12211:5c2ae28f536e

mod_tls: Set ALPN on outgoing connections Relevant and sometimes needed for Direct TLS which mod_s2s uses this context for. Primarily when e.g. mod_net_multiplex or equivalent ALPN based dispatch is used. All these contexts should likely move away from mod_tls and into either mod_s2s or portmanager. The later already duplicates some of this work.
author Kim Alvefur <zash@zash.se>
date Tue, 25 Jan 2022 13:20:26 +0100
parent 7078:ec17115e3721
child 12355:a0ff5c438e9d
line wrap: on
line source

-- Prosody IM
-- Copyright (C) 2008-2010 Matthew Wild
-- 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 random = require "util.random";
local random_bytes = random.bytes;
local hex = require "util.hex".to;
local m_ceil = math.ceil;

local function get_nibbles(n)
	return hex(random_bytes(m_ceil(n/2))):sub(1, n);
end

local function get_twobits()
	return ("%x"):format(random_bytes(1):byte() % 4 + 8);
end

local function generate()
	-- generate RFC 4122 complaint UUIDs (version 4 - random)
	return get_nibbles(8).."-"..get_nibbles(4).."-4"..get_nibbles(3).."-"..(get_twobits())..get_nibbles(3).."-"..get_nibbles(12);
end

return {
	get_nibbles=get_nibbles;
	generate = generate ;
	-- COMPAT
	seed = random.seed;
};