prosody
9016071867d7
util/random.lua

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util/random.lua @ 12281:9016071867d7

mod_admin_shell: Track connected events instead of created The connection events are more appropriate here, where the s2s-created events happens a bit later or earlier in a sessions lifetime depending on its direction and for outgoing connections isn't actually the creation time (which happens immediately after pressing enter, so not very interesting), but rather closer to the connection time.
author Kim Alvefur <zash@zash.se>
date Sun, 06 Feb 2022 14:34:02 +0100
parent 10016:af8c514e5cf7
child 12446:e54b8a5e35ad
line wrap: on
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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)
	local data, err = urandom:read(n);
	if not data then
		if err then
			error("Unable to retrieve data from secure random number generator (/dev/urandom): "..tostring(err));
		else
			error("Secure random number generator (/dev/urandom) returned an end-of-file condition");
		end
	end
	return data;
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";
};