prosody
012d6e7b723a
util/random.lua

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util/random.lua @ 13027:012d6e7b723a

integration tests: Preserve unmocked time.monotonic() With monotonic() frozen, timers may fail to trigger. This caused problems after the new util.startup changes that moved the server-started event to a timer. The timer wouldn't trigger, the event didn't fire, and prosody would fail to daemonize. All the tests that depend on specific time behaviour are depending on wall clock time, so only mocking util.time.now() and os.time() fixes those.
author Matthew Wild <mwild1@gmail.com>
date Thu, 06 Apr 2023 14:00:54 +0100
parent 12975:d10957394a3c
line wrap: on
line source

-- 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, "prosody.util.crand");
if ok and pcall(crand.bytes, 1) 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";
};