mirror of
https://github.com/bjc/prosody.git
synced 2025-04-03 21:27:38 +03:00
32 lines
837 B
Lua
32 lines
837 B
Lua
-- 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".encode;
|
|
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;
|
|
};
|