public inbox for u-boot@lists.denx.de
 help / color / mirror / Atom feed
From: Michael Walle <michael@walle.cc>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH v4 1/3] lib: add rand() function
Date: Fri, 11 May 2012 23:34:18 +0200	[thread overview]
Message-ID: <201205112334.19132.michael@walle.cc> (raw)
In-Reply-To: <20120511212947.061A5206496@gemini.denx.de>

Am Freitag 11 Mai 2012, 23:29:47 schrieb Wolfgang Denk:
> Dear Michael Walle,
> 
> In message <201205112320.15462.michael@walle.cc> you wrote:
> > > This is inconsequent.  Either we assume that the user will seed
> > > srand(), then y should not be initialized at all, so it goes to the
> > > BSS segment and does not waste space in the binary image.  Or we want
> > > to deal with cases where the user doesn call srand(), and then we
> > > should provide a bit better than such a static initialization.
> > 
> > Again, i wanted to stick with the regular rand() srand() semantics.
> > 
> > http://pubs.opengroup.org/onlinepubs/009695399/functions/rand.html
> > "If rand() is called before any calls to srand() are made, the same
> > sequence shall be generated as when srand() is first called with a seed
> > value of 1."
> 
> Good point.
> 
> But then y should be initialized as 1 ?
I'm no crypto expert, so i sticked with the values/examples from the cited 
paper. But i guess it shouldn't make any difference, i'll change it to 1.

-- 
michael

  reply	other threads:[~2012-05-11 21:34 UTC|newest]

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-05-10 17:32 [U-Boot] [PATCH v4 0/3] net: helper functions Michael Walle
2012-05-10 17:32 ` [U-Boot] [PATCH v4 1/3] lib: add rand() function Michael Walle
2012-05-11 19:20   ` Wolfgang Denk
2012-05-11 20:32     ` Michael Walle
2012-05-11 20:43       ` Wolfgang Denk
     [not found]         ` <201205112249.27871.michael@walle.cc>
2012-05-11 21:11           ` Wolfgang Denk
2012-05-11 21:20             ` Michael Walle
2012-05-11 21:29               ` Wolfgang Denk
2012-05-11 21:34                 ` Michael Walle [this message]
2012-05-10 17:32 ` [U-Boot] [PATCH v4 2/3] net: add helper to generate random mac address Michael Walle
2012-05-11 19:21   ` Wolfgang Denk
2012-05-14  5:43     ` Mike Frysinger
2012-05-10 17:32 ` [U-Boot] [PATCH v4 3/3] net: add eth_setenv_enetaddr_by_index() Michael Walle
2012-05-11 19:25   ` Wolfgang Denk
2012-05-11 21:01     ` Michael Walle
2012-05-11 21:16       ` Wolfgang Denk
2012-05-11 22:12         ` Michael Walle
2012-05-11 16:32 ` [U-Boot] [PATCH v4 0/3] net: helper functions Michael Walle
2012-05-11 16:46   ` Joe Hershberger
2012-05-11 16:51     ` Prafulla Wadaskar
2012-05-21 20:52       ` Michael Walle
2012-05-11 19:18 ` Wolfgang Denk
2012-05-11 20:29   ` Michael Walle
2012-05-11 20:43     ` Wolfgang Denk
2012-05-11 20:54       ` Michael Walle
2012-05-11 21:14         ` Wolfgang Denk
2012-05-11 21:22           ` Michael Walle
2012-05-11 21:30             ` Wolfgang Denk
2012-05-11 21:42               ` Michael Walle
2012-05-11 21:55                 ` Wolfgang Denk
2012-05-14  5:42             ` Mike Frysinger

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=201205112334.19132.michael@walle.cc \
    --to=michael@walle.cc \
    --cc=u-boot@lists.denx.de \
    /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.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox