[Cryptography Team] Hello everyone!

[Joshua Gargus]

On Nov 24, 2006, at 3:05 PM, Ron Teitelbaum wrote:

> Hi Joshua!
>
> Welcome to the team!  What are you squeaksource initials and I'll  
> add you to
> the repository.

'jcg'

> It's great to have you here.  Thanks for your changes I'll
> have a look at post them next week.

Thanks.

>
> Your projects sound really cool; if there is something that we can  
> do to
> help please let us know.

And thanks again.

>
> We are working towards getting the crypto primitives built into the  
> base VM.
> Krishna is looking at SHA256 primitive, any chance you would work  
> with him
> on it?

I can't promise anything more than discussion before the end of the  
year, but I'll be happy to talk to him.  From a quick profile, it is  
clear that speeding up ThirtyTwoBitRegister would make a huge  
difference. The methods
	- bitShift	
	- leftRotateBy:
	- +=	
	- bitXor:
	- bitAnd: 	
	- bitOr:
	- bitInvert
account for about 80% of the computation time.  Another 14% (outside  
of the previous 80%) is creating and loading ThirtyTwoBitRegisters.

I see that ThirtyTwoBitRegisters are also used in Rijndael, but I  
haven't profiled it to see if they are the current bottleneck on  
performance.

>
> We are also working on CC validation, an ASN.1 framework, a Microsoft
> CryptoAPI interface, OpenPGP, support for OpenSSL, and I'd like to  
> integrate
> some software for libCURL.
>
> Have you looked at Cees UDP Tric framework yet?  I'm not sure if it  
> will
> help but it might be worth your time to check it out.

Yes, I've had a look at it.  Rob's SSL protocol stack is also  
interesting.  I'm not sure if I'll be able to reuse code directly,  
but they're both useful.

Best,
Josh


>
> Again it's great to have you here, welcome!
>
> Ron Teitelbaum
> Squeak Cryptography Team Leader
>
>> -----Original Message-----
>> From: cryptography-bounces at lists.squeakfoundation.org
>> [mailto:cryptography-bounces at lists.squeakfoundation.org] On Behalf Of
>> Joshua Gargus
>> Sent: Friday, November 24, 2006 5:43 PM
>> To: cryptography at lists.squeakfoundation.org
>> Subject: [Cryptography Team] Hello everyone!
>>
>> Hi crypto-squeakers,
>>
>> I just signed up for the list, and I come with a friendship-offering
>> of code!
>>
>> Before we get to the goodies, a few words about myself...
>>
>> I've been a Squeaker since '98 or so, and have always found
>> cryptography fascinating.  Like everyone, I don't have the time to
>> engage in everything that I find interesting.  Lucky for me, my job
>> now gives me a reason to use and contribute the Squeak crypto
>> codebase.  I probably won't tackle broad framework issues (it looks
>> like everyone is doing a fine job, anyway), but I expect to at least
>> provide primitive implementations for a cipher or two.
>>
>> The task at hand is to implement a custom audio- and video-
>> conferencing framework, and it needs to be secure.  It doesn't need
>> to follow standards such as SRTP (thank goodness, given the
>> timeline), but it does need to perform well.  Therefore, it needs to
>> be implemented over UDP.  I intend to implement a transport layer
>> similar to DTLS (google rfc4347).  Since this requires a cipher that
>> can efficiently reset its state from an initialization vector (thus
>> ruling out RC4, which we have been using for other purposes), I'll
>> probably want to use Rijndael.
>>
>> Now for the goodies.  I have two .mcz files that I'm attaching; I
>> trust that they're small enough to not inconvenience anyone on  
>> dial-up:
>>
>> Cryptography-Core.jcg.18
>> 	- some speed improvements
>> 	- a simple framework for using insecure ciphers, but not
>> accidentally
>
>
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