File

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−-- Prosody IM
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−-- Copyright (C) 2008-2014 Matthew Wild
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−-- Copyright (C) 2008-2014 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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−
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−local ok, crand = pcall(require, "util.crand");
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−if ok then return crand; end
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−
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−local urandom, urandom_err = io.open("/dev/urandom", "r");
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−
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−local function bytes(n)
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−	local data, err = urandom:read(n);
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−	if not data then
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−		if err then
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−			error("Unable to retrieve data from secure random number generator (/dev/urandom): "..tostring(err));
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−		else
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−			error("Secure random number generator (/dev/urandom) returned an end-of-file condition");
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−		end
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−	end
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−	return data;
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−end
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−
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−if not urandom then
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−	function bytes()
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−		error("Unable to obtain a secure random number generator, please see https://prosody.im/doc/random ("..urandom_err..")");
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−	end
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−end
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−
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−return {
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−	bytes = bytes;
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−	_source = "/dev/urandom";
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−};