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util/random.lua @ 8655:ba6a6a04b46c
util.async: Allow nil as a guard key
author | Matthew Wild <mwild1@gmail.com> |
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date | Thu, 22 Mar 2018 16:26:09 +0000 |
parent | 8243:292f61d9d30a |
child | 10014:5d2f7144fa12 |
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-- Prosody IM -- Copyright (C) 2008-2014 Matthew Wild -- Copyright (C) 2008-2014 Waqas Hussain -- -- This project is MIT/X11 licensed. Please see the -- COPYING file in the source package for more information. -- local ok, crand = pcall(require, "util.crand"); if ok then return crand; end local urandom, urandom_err = io.open("/dev/urandom", "r"); local function bytes(n) return urandom:read(n); end if not urandom then function bytes() error("Unable to obtain a secure random number generator, please see https://prosody.im/doc/random ("..urandom_err..")"); end end return { bytes = bytes; _source = "/dev/urandom"; };