prosody
e662c172ea0f
util/uuid.lua

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Software / code / prosody

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util/uuid.lua @ 12070:e662c172ea0f

mod_smacks: Remove references to connection on hibernation Still having the connection on the session may cause unintentional behavior, such as the session being treated as if connected, even tho the connection has been closed.
author Kim Alvefur <zash@zash.se>
date Sat, 18 Dec 2021 12:50:53 +0100
parent 7078:ec17115e3721
child 12355:a0ff5c438e9d
line wrap: on
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-- 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;
};