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32 lines
833 B
32 lines
833 B
-- Prosody IM
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-- Copyright (C) 2008-2010 Matthew Wild
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-- Copyright (C) 2008-2010 Waqas Hussain
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--
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-- This project is MIT/X11 licensed. Please see the
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-- COPYING file in the source package for more information.
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--
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local random = require "util.random";
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local random_bytes = random.bytes;
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local hex = require "util.hex".to;
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local m_ceil = math.ceil;
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local function get_nibbles(n)
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return hex(random_bytes(m_ceil(n/2))):sub(1, n);
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end
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local function get_twobits()
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return ("%x"):format(random_bytes(1):byte() % 4 + 8);
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end
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local function generate()
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-- generate RFC 4122 complaint UUIDs (version 4 - random)
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return get_nibbles(8).."-"..get_nibbles(4).."-4"..get_nibbles(3).."-"..(get_twobits())..get_nibbles(3).."-"..get_nibbles(12);
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end
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return {
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get_nibbles=get_nibbles;
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generate = generate ;
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-- COMPAT
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seed = random.seed;
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};
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