mailing list of musl libc
 help / color / mirror / code / Atom feed
From: Szabolcs Nagy <nsz@port70.net>
To: musl@lists.openwall.com
Subject: Re: thoughts on reallocarray, explicit_bzero?
Date: Thu, 29 Jan 2015 11:04:31 +0100	[thread overview]
Message-ID: <20150129100431.GJ32318@port70.net> (raw)
In-Reply-To: <CAPLrYEQDw-afOSS+o4Z82LsZRaUyJn+x18d_qVO5BO13aV-GgA@mail.gmail.com>

* Daniel Cegie??ka <daniel.cegielka@gmail.com> [2015-01-29 10:30:40 +0100]:
> yet another secure_memzero(). A better solution would be to promote a
> single standard (eg. memset_s()) and the expectation that the compiler
> will respect it.
> 

i think you don't know the semantics of memset_s
(it uses nonsense types, has superflous arguments, handles
constraint violations through global state etc)

it is a complicated mess and not a good api to standardize on
if all you want is to avoid information leak in crypto code

(btw no memset based solution can provide complete protection
against info leak: if the crypto function is interrupted by
a signal then all the register state will be copied to the
stack or altstack and kept around for arbitrarily long time
which is plenty information leaked)


  reply	other threads:[~2015-01-29 10:04 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-05-19 15:31 Isaac Dunham
2014-05-19 15:43 ` Rich Felker
2014-05-19 16:19   ` Daniel Cegiełka
2014-05-20  6:19     ` Rich Felker
2014-05-20 15:50       ` Daniel Cegiełka
2014-05-19 15:44 ` Daniel Cegiełka
2014-05-19 16:16   ` Rich Felker
2014-05-19 16:30     ` Daniel Cegiełka
2014-05-19 16:32     ` Szabolcs Nagy
2015-01-28 22:01     ` Daniel Cegiełka
2015-01-28 22:34       ` Daniel Cegiełka
2015-01-28 22:38         ` Nathan McSween
2015-01-28 22:54           ` Daniel Cegiełka
2015-01-28 23:02             ` Josiah Worcester
2015-01-29  2:19         ` Rich Felker
2015-01-29  4:03           ` Brent Cook
2015-01-29  4:15             ` Rich Felker
2015-01-29  9:30               ` Daniel Cegiełka
2015-01-29 10:04                 ` Szabolcs Nagy [this message]
2015-01-29 10:31                   ` Daniel Cegiełka
2015-01-29 10:54                   ` Daniel Cegiełka
2014-05-19 16:25 ` Szabolcs Nagy
2014-05-19 16:45   ` Daniel Cegiełka
2014-05-19 16:58     ` Rich Felker
2014-05-19 16:55   ` Rich Felker
2014-05-19 18:12     ` Szabolcs Nagy
2014-05-19 22:08   ` Andy Lutomirski
2014-05-20  0:41     ` Szabolcs Nagy
2014-06-11  9:59   ` Thorsten Glaser
2014-06-11 12:59     ` Rich Felker

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20150129100431.GJ32318@port70.net \
    --to=nsz@port70.net \
    --cc=musl@lists.openwall.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
Code repositories for project(s) associated with this public inbox

	https://git.vuxu.org/mirror/musl/

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).