Cryptography March 2007

cryptography@lists.squeakfoundation.org

5 participants
12 discussions

Any volunteers to mentor a Crypto/Exupery Soc project?
by bryce＠kampjes.demon.co.uk 21 Mar '07

21 Mar '07

I've proposed a project to use Exupery to provide either fast ByteArray or fast 32 bit arithmetic aiming to be useful for cryptology. Is there any crypto people interested in co-mentoring? Most of the mentoring will be on the Exupery side but some help selecting benchmarks and evaluating the results could be very useful. The idea for 32 bit integers is to provide a proper boxed object that contains a 32 bit integer then write primitives for the required arithmetic. With some work (the project) Exupery should be able to remove the unnecessary boxing between expressions. If the objects were "register" objects that could be assigned to then there is a chance that we could remove all Smalltalk's overhead although a safe guess is would be we'd achieve about 1/2 C's speed. 32 bit integers are a great project because the code delivered could be very simply extended to also work with floating point numbers providing the same level of efficiency. Working with 32 bit integers allows the approach to be proven in a practical setting without also needing to add support for floating point instructions. Less work, but proves the same point and will be easily adaptable to do both. Bryce

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RE: [Cryptography Team] Debugging SSL on Linux
by Ron Teitelbaum 20 Mar '07

20 Mar '07

Great that explains it. I'll look at the asn more closely and let you know tomorrow. Ron _____ From: Robert Withers [mailto:reefedjib@yahoo.com] Sent: Tuesday, March 20, 2007 6:26 PM To: Ron(a)USMedRec.com Cc: 'Norbert Hartl'; 'Cryptography Team Development List' Subject: Re: [Cryptography Team] Debugging SSL on Linux Hey Ron, You are back on the SSL version. The latest is SSL.111. You are missing all of the Certificate validation code that I put in and this is why you are able to connect, since all of the problems in this case are with validation. Since you have the latest X509, you are decoding the CertificateExtensions, which would expose problems 2 and 3, but you aren't encoding them for signature validation, per the above reason, so you never have a problem. Norbert, if you load SSL.109 it should work, while we get this issue fixed. This is just missing a lot of security. Rob On Mar 20, 2007, at 3:03 PM, Ron Teitelbaum wrote: Hey Rob, I'll look more into the asn issue but this doesn't explain why it works on my machine. I was able to connect and retrieve data just fine, I just checked again with: ANS1.26 Core.23 SSL.109 X509.32 I'll try your new code but first I'll verify the extension data and see if I can tell why it is parsing correctly on my machine. I can't get to it till tomorrow. Thanks for looking at it! Ron _____ From: Robert Withers [mailto:reefedjib@yahoo.com] Sent: Tuesday, March 20, 2007 4:43 PM To: Ron(a)USMedRec.com; Cryptography Team Development List Cc: 'Norbert Hartl' Subject: Re: [Cryptography Team] Debugging SSL on Linux Ron and Norbert, I found that SSL failed to establish a connection on the Mac, and I suspect the same is actually true on Windows, on close inspection. The resulting MIMEDocument has an error when evaluating the example: https://home.selfish.orgHello everyone, This is from Norbert: I tried using the url that Norbert gave and it worked fine on Windows. Could someone try this on Linux and see if they can help provide info as to what is going wrong. I suspect that the client hello is causing the server to disconnect. Maybe an Endian issue? Ron Teitelbaum Squeak Cryptography Team Leader _______________________________________________ Cryptography mailing list <mailto:Cryptography@lists.squeakfoundation.org> Cryptography(a)lists.squeakfoundation.org <http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/cryptography> http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/cryptography

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Cryptography March 2007