OSKit Entropy Pool Hacks

ddavies@ddavies.net
Chinese character for entropy (This Chinese symbol means "entropy")

Savannah CVS

09-Jul-2003

The best way to get the entropy hacks for GNU/Hurd running on GNUMach 2.0 (aka OSKIT/Mach) is to use the cvs server at savannah.gnu.org. Here are the directions for building GNUMach 2.0.

Make sure modules.x86.pc (haven't even tried ARM, no HW) has the "random" module uncommented. You'll need a GNUmake make line vaguely like this:

make kernel-ide+entropy_random+ethernet_tulip

Once you have GNUMach 2.0 running you can try out the pool by using the entropystat program. If you simply say entropystat (without further arguments) you'll see an estimate of how many bytes are in the pool printed to stdout.

The -d N option attempts to drain N bytes from the pool and print them to stdout. Counts of estimated bytes in the pool are printed on stdout both before and after the drian attempt.

The -w F option writes the bytes of the file F (a pathname) to the random pool. Estimated entropy counts are printed ala -d.

There is also a Hurd translator that is limping along. I will make it available soon - after I've debugged it a little more. This is based on Marcus Brinkmann's user space translator for GNUMach 1.x. My plan is to have the translator detect at start up time which GNUMach major version it's running under. If that's GNUMach 1.x we use the user space entropy pool. If it's 2.x we use the kernel space entropy pool.

WARNING: Don't trust this entropy. There are definately races in GNUMach 2.0 that might be exploited and of course it should go without saying that I am not a guy who understands entropy or cryptography (I have zero credentials!). That said, the output, when I get it without crashing too soon, looks random to me. I'll post a picture of a plot of a long sequence of numbers from the pool soon, and we'll see how that looks...


A comitter for the oskit project at U Utah said he'd take my changes for the next release of OSKit, but since GNU have forked oskit anyway I don't keep my patch up to date. I will try to synch up with the Utah people when/if they do another oskit release (do not hold your breath!). There are bug fixes that aren't here in the savannah CVS tree and you'd likely be better off using that.

The stuff below is obsolete. Use the savannah directions above.

??-???-2003

This patch adds the Linux 2.2.12 random device to the St. Patrick's Day release of OSkit. As is, only Linux devices contribute entropy with this release although the bottom half API is expected to be adequate for interfacing with other OSKit drivers as well (ie FreeBSD).

There are a couple of example kernels that demonstrate some basic usage. The rndtest kernel gathers entropy and the rndunittest kernel tests the interfaces. So far I've concentrated on IDE disk and network entropy. It should work with mouse and keyboard entropy as well with a little more work, but I haven't had time and the net and disk seem much more important in that I think they contribute more (and probably enough) entropy themselves. SCSI would be good to do but I don't have SCSI hardware.

This is untested, VERY alpha quality software! I know nothing about entropy or cryptology. I heard that entropy may not even exist! DO NOT TRUST the security of this software!

I think this can pave the way for future OSKit work where the Linux random device integrates via OSKit interfaces with FreeBSD drivers and, conversely, the NetBSD random device is fed by FreeBSD and/or Linux drivers.

There's a patch here for the St. Pat's Day release of OSKit. This patch is disjoint from the 2.2.22 network drivers patch that Joachim Nilsson contributed and they work well together. I've tested the rtl8931 and it contributed entropy.

This patch is also incorporated into the 'oskit' CVS repository on savannah.gnu.org . Read the FAQ for more info.

Any omissions/errors please let me know. Thanks for looking at my code!


Patch Files


Applying the patch:

  1. Get the St. Patrick's day OSKit snapshort
  2. Get The latest entropy patch
  3. cd {somedir}
  4. tar zxvf oskit-20020317.tar.gz
  5. patch -p0 < {latest-date}-entropy-oskit-patch
  6. build OSKit in the usual way


Misc Files


For an alternate route to Journal of Emerging finance market.There are affordable cars, and then there are cars that offer thrilling performance. Rarely do the two ever converge, but Japanese automake mazada.new impreza 2008 Impreza Photos | Subaru News, Articles, Road Tests, Test Drives, Comparisons, Concepts.manhattan beach toyota Los Angeles Toyota Dealer, is a New & Pre-Owned Toyota dealership, with OEM Toyota parts and professional Toyota service.fashions like you need it: make fashion trends work for you, get fashion on a budget, dress for your body and look great for special occasions.How to treat a fragile man without health insurance man.gadget store buy drinking games, gadgets & boys toys. Shop online for fun gifts, presents, gizmos and games.Review and road test of the Ford mondeo.Discover new cars from hyndai.Find new kia.suzuki vehicles on our Car Finder Buy and Sell New Used Cars Philippines 2009 site.Your Suzuki Motorcycle Info Source: Suzuki Motorcycles Used Dual Purpose Motorcycles For Sale · View 2008 Suzuki Models 2008 suzuki.auto manufacturer site with information on the Sedona, Sorento, Sportage, Optima, Spectra and Rio vehicles www kia.Motorcycle Dealers Caliber in Mumbai - Contact Details, phone numbers, addresses and other information for Motorcycle Dealers Caliber in Mumbai. dealerships caliber.Electronics and gadgets are two words that fit very well together. The electronic gadget.2001 excursion highlights from Consumer Guide Automotive. Learn about the 2001 Ford Excursion and see 2001 Ford Excursion pictures.ford Motor Company maker of cars, trucks, SUVs and other vehicles. View our vehicle showroom, get genuine Ford parts and accessories, find dealers.The soul of Formula M: reloaded. Combining motorsport capabilities with everyday driving. The bmw coupe.Vintage and Classic Car Club of India vintage car.Welcome - Feel Good Natural health stores.Welcome to mazdas global website.Locate the nearest Chevrolet Car chevy dealer

sacha prieto

for why one finds

blue book value canadian

RSS Feed

masturb techniques

Abner Doble

german pigs in a blanket recipe

better way

elkhorn locker service inc

black lace

food web for savanna biome

home prices

asbury park tide tables

insurance companies

deep fryer chicken recipes

pregnant women

dibs in search of self review

air bags

massage therapy palm springs

website which

quick salsa recipe

customer service

homemade chocolate covered cherries recipes

winter sports

negros denudos

pickup truck

recipe bacon wrapped filet mignon

pretty good

leroy glazier biography

home business

shanda sharer autopsy

started back

ftvangels

opposition player

loader backhoes for sale

of Nature in which

importance of domestic food trade

new MLS

big bore kits for kx 100

moved back

easy costa rica recipes

kill son lake

maria moore my boob

Las Vegas

bobobo bo bo bobo hentai

grey parrot

ahold 401k

great choice

maps over operation barbarossa

rubbish removal

hotel paradise kay parker

business consulting

web site for paula dean s recipes

daily basis

westernchikan

politics health

south korea massage parlor

having sex

livedoor futaba reverse

seller financing

oxi model video

Australia working

southtown expo center

opposite sex

mensajitos de tigo

Australian law

acupuncture to induce labor

people like

nutrena pet food recall

indigenous Australians

should you pop a fever blister

snow blade

location of clotoris

Greek Orthodox

silke maiden sperma

county borough

myspac3

which makes

curry soup recipe

theories of knowledge

cisco food products houston

stop now

carla carter firm infomercial

Erik Satie�s

janines been blackmail the vidoe

modern computers

ice skating

paul deans recipes

high school

nigella s christmas recipe s

take advantage

ftv maryam

over million

pork neck recipe

World Wide

ls magazine issue 4

natural gas

used massey ferguson 399 tractors

Shih Tzu

interesting facts about the excretory system

online fire

driver slimtype combo lsc 24082k

travel guides

technical dog food

public auction

aquarius bath house winnipeg

moment later

gateway model ma7 specs

carbon dioxide

renee olstead sexy

acid reflux

wpnfire cheats

never did

recipe triple berry cobbler

From the outset

maturbating women

good little

medidas convertir pulgadas a pies

find any new work

alpha phi alpha hymn

good deal