/usr/lib/prosody/util/uuid.lua is in prosody 0.9.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 | -- 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 m_random = math.random;
local tostring = tostring;
local os_time = os.time;
local os_clock = os.clock;
local sha1 = require "util.hashes".sha1;
module "uuid"
local last_uniq_time = 0;
local function uniq_time()
local new_uniq_time = os_time();
if last_uniq_time >= new_uniq_time then new_uniq_time = last_uniq_time + 1; end
last_uniq_time = new_uniq_time;
return new_uniq_time;
end
local function new_random(x)
return sha1(x..os_clock()..tostring({}), true);
end
local buffer = new_random(uniq_time());
local function _seed(x)
buffer = new_random(buffer..x);
end
local function get_nibbles(n)
if #buffer < n then _seed(uniq_time()); end
local r = buffer:sub(0, n);
buffer = buffer:sub(n+1);
return r;
end
local function get_twobits()
return ("%x"):format(get_nibbles(1):byte() % 4 + 8);
end
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
seed = _seed;
return _M;
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