X-Git-Url: https://git.enpas.org/?a=blobdiff_plain;f=util%2Fuuid.lua;h=e10fc0f72290a996c09560632e4c94603dff74fb;hb=59224f73ca26a00292f127e081af3cf47f57ae1f;hp=e1c02c91cd16cce3b51500e1e596d528972c8e05;hpb=e9a8b9230d8614b2b02438519d02719d6be6a86b;p=prosody.git diff --git a/util/uuid.lua b/util/uuid.lua index e1c02c91..e10fc0f7 100644 --- a/util/uuid.lua +++ b/util/uuid.lua @@ -1,9 +1,32 @@ +-- 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; -module "uuid" +local random = require "util.random"; +local random_bytes = random.bytes; +local hex = require "util.hex".to; +local m_ceil = math.ceil; -function generate() - return m_random(0, 99999999); +local function get_nibbles(n) + return hex(random_bytes(m_ceil(n/2))):sub(1, n); end -return _M; \ No newline at end of file +local function get_twobits() + return ("%x"):format(get_nibbles(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; +};