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[Savannah task #5130: random translator](http://savannah.gnu.org/task/?5130)
See the attached [[mbox.bz2]] containing all the emails concerning this topic
which I was able to gather from public archives. (!) This is not up-to-date
anymore, as [[MichaelCasadevall]] is currently working on this.
# Description
Sources of entropy are for example disk access latencies or keystroke patterns
or behavior on networks. This suggests that for implementing a random
translator a kernel part is needed as well, to gather that entropy. That
kernel part would then export the gathered entropy via a kernel device, named
perhaps `entropy`.
# Setup Pseudo Random Devices
Stuck getting SSH to work? You need a pseudo random generator (PRG).
There are several solutions to the lack of `/dev/random` and `/dev/urandom`,
but they are not yet in the default installation.
* Marcus' work can be downloaded at
[random.tar.gz](ftp://alpha.gnu.org/gnu/hurd/contrib/marcus/random.tar.gz).
(Identical to <http://kilobug.free.fr/hurd/random-64.tar.gz>?)
* [A patch](http://mail.gnu.org/pipermail/bug-hurd/2002-August/010248.html)
that was probably already incorporated from August 14, 2002.
* Clemmitt Sigler [reported
success](http://lists.gnu.org/archive/html/help-hurd/2002-10/msg00076.html)
October 11, 2002 and Marcus [described
some](http://lists.gnu.org/archive/html/help-hurd/2002-10/msg00081.html) of
the internals.
* [Entropy Gathering Daemon](http://egd.sourceforge.net/).
* [request for packaging](http://bugs.debian.org/145498).
* [OSKit Entropy
Patch](http://lists.gnu.org/archive/html/bug-hurd/2003-01/msg00000.html) from
Derek Davies - Jan 2003.
* See also [this page](http://www.ddavies.net/oskit-entropy/).
* Note that this patch can (and should) be used with this [OSKit NIC
patch](ftp://flux.cs.utah.edu/flux/oskit/mail/html/oskit-users/msg01570.html).
* [Sune Kirkeby's incomplete port of the Linux /dev/\{,u\}random device
driver](http://ibofobi.dk/stuff/hurd-entropy/)
* [The files](http://download.ibofobi.dk/hurd-entropy/), including a [patch
for GNU
Mach](http://download.ibofobi.dk/hurd-entropy/gnumach-entropy.diff.bz2).
---
# Setup Tips
Here are some tips on how to actually setup the two random devices using
Kilobugs' [random-64 server](http://kilobug.free.fr/hurd/random-64.tar.gz).
His tarball is a complete Hurd server including a pre-built binary - so you
don't need GCC or magic fingers for this! :)
After untaring the package you copy the random binary to the `/hurd`
directory. Then you setup the translators for random and urandom.
# settrans -c /dev/random /hurd/random \
--seed-file /var/run/random-seed --secure
# settrans -c /dev/urandom /hurd/random \
--seed-file /var/run/urandom-seed --fast
# chmod 0644 /dev/random /dev/urandom
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