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util/random.lua @ 12807:f0f7b0c61465
mod_s2s: Avoid sending too large stanzas
Just dropping them isn't great but hopefully something more sensible can
be done in the future.
Will need work to ensure that this signal is handled correctly in
sending modules etc.
author | Kim Alvefur <zash@zash.se> |
---|---|
date | Tue, 16 Mar 2021 18:30:54 +0100 (2021-03-16) |
parent | 12446:e54b8a5e35ad |
child | 12975:d10957394a3c |
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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 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"; };