[ENH] AES
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[ENH] AES
by Cerebus
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from preamble:
"Change Set: AES Date: 24 November 2006 Author: Timothy J. Miller It struck me as convenient to have an AES class. All I did was subclass Rijndael and override new with the relevant block size and key size. I have no idea if this is sufficient, but I suppose it's a start. Now I need to figure out how to write tests."! _______________________________________________ Cryptography mailing list Cryptography@... http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/cryptography |
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Re: RE: [ENH] AES
by Cerebus
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IIRC it's like "rhine-dahl."
Here's a sound file: http://rijndael.info/audio/rijndael_pronunciation.wav -- Tim _______________________________________________ Cryptography mailing list Cryptography@... http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/cryptography |
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RE: [ENH] AES
by Ron Teitelbaum
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Welcome Tim! It's nice to have you here. I'm sure your experience will be
very useful. Maybe you can help us write a grant to fund our lab expenses! Ron > -----Original Message----- > From: cryptography-bounces@... > [mailto:cryptography-bounces@...] On Behalf Of > Cerebus > Sent: Friday, November 24, 2006 6:07 PM > To: cryptography@... > Subject: Re: [Cryptography Team] [ENH] AES > > On 11/24/06, cerebus2@... <cerebus2@...> wrote: > > > It struck me as convenient to have an AES class. All I did was subclass > > Rijndael and override new with the relevant block size and key size. I > > have no idea if this is sufficient, but I suppose it's a start. Now I > > need to figure out how to write tests. > > Just to let everyone know, I *really* don't have any idea what I'm doing. > :) > > Background: I don't write code in my day job, and it's been many > years since I've seriously coded at all beyond scripting for my own > convenience. Currently I'm working for an FFRDC supporting a > government PKI, so I've been steeped more in the policy end and riding > herd on vendors (like Cisco, though I don't think I've ever met > Krishna before) for the last 10 years, with a dash of sysadmin and > testing thrown into the mix. > > My knowledge of crypto doesn't extend far beyond using the primitives > to construct protocols & systems. I don't get the math, I may never > get the math, but in the end it may not matter. > > My interest in Squeak runs back a bunch of years, but I never did more > than toy with it. What's changed recently was I got a chance to sit > in on a demonstration by a couple of guys from MIT Lincoln Labs who > are doing interesting things with Boneh/Waters/Gentry broadcast > encryption on a contract. Their system requires ECC and I thought it > would be interesting to model their prototype, which led me back to > Squeak, which led me to this project. > > -- Tim > _______________________________________________ > Cryptography mailing list > Cryptography@... > http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/cryptography _______________________________________________ Cryptography mailing list Cryptography@... http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/cryptography |
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RE: RE: [ENH] AES
by Ron Teitelbaum
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Very cool thanks!!
Ron > -----Original Message----- > From: cryptography-bounces@... > [mailto:cryptography-bounces@...] On Behalf Of > Cerebus > Sent: Friday, November 24, 2006 6:12 PM > To: Ron@...; Cryptography Team Development List > Subject: Re: RE: [Cryptography Team] [ENH] AES > > IIRC it's like "rhine-dahl." > > Here's a sound file: > > http://rijndael.info/audio/rijndael_pronunciation.wav > > -- Tim > _______________________________________________ > Cryptography mailing list > Cryptography@... > http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/cryptography _______________________________________________ Cryptography mailing list Cryptography@... http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/cryptography |
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Re: [ENH] AES
by Joshua Gargus-2
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It seems like a good idea to refactor as a single class. However,
even with a single class that can handle multiple key sizes, it seems redundant to have a #keySize: method, when the size of the key can be easily determined in #key: . It would make sense to make this change in Rijndael, and have AES inherit it. With respect to #blockSize:, it might be better to throw an exception (eg: 'AES does not support multiple block sizes; use Rijndael instead') so that the user is educated, rather than assuming that the method does something when it really doesn't. Cheers, Josh On Nov 24, 2006, at 9:17 PM, Cerebus wrote: > On 11/24/06, cerebus2@... <cerebus2@...> wrote: > >> Added AES192 and overloaded the blockSize: and keySize: methods with >> do-nothings (is there a better way to do this?) since they make no >> sense >> for AES. Part of me is thinking that these should be a single class >> with keySize selection at instance creation. Comments welcome."! > > I'm also working on a couple of tests, but I'll note that I threw a > couple of FIPS 197 and RFC3602 test vectors at these classes and they > came out fine. > > The more I think about it the more I think I'll refactor as a > single class. > > -- Tim > _______________________________________________ > Cryptography mailing list > Cryptography@... > http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/ > cryptography _______________________________________________ Cryptography mailing list Cryptography@... http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/cryptography |
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Re: Re: [ENH] AES
by Cerebus
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On 11/24/06, Joshua Gargus <schwa@...> wrote:
> It seems like a good idea to refactor as a single class. However, > even with a single class that can handle multiple key sizes, it seems > redundant to have a #keySize: method, when the size of the key can be > easily determined in #key: . It would make sense to make this change > in Rijndael, and have AES inherit it. I *just* posted a refactoring. > With respect to #blockSize:, it might be better to throw an exception > (eg: 'AES does not support multiple block sizes; use Rijndael > instead') so that the user is educated, rather than assuming that the > method does something when it really doesn't. Good point. I guess I'll have to go learn exceptions now. Tomorrow. Err, today. In the morning--wait. After some sleep. :) -- Tim _______________________________________________ Cryptography mailing list Cryptography@... http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/cryptography |
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Re: [ENH] AES
by Joshua Gargus-2
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On Nov 24, 2006, at 10:25 PM, Cerebus wrote: > On 11/24/06, Joshua Gargus <schwa@...> wrote: >> It seems like a good idea to refactor as a single class. However, >> even with a single class that can handle multiple key sizes, it seems >> redundant to have a #keySize: method, when the size of the key can be >> easily determined in #key: . It would make sense to make this change >> in Rijndael, and have AES inherit it. > > I *just* posted a refactoring. > >> With respect to #blockSize:, it might be better to throw an exception >> (eg: 'AES does not support multiple block sizes; use Rijndael >> instead') so that the user is educated, rather than assuming that the >> method does something when it really doesn't. > > Good point. I guess I'll have to go learn exceptions now. Easy. Just make a new subclass of Error, perhaps ImproperCipherUse, and then override #blockSize: to signal it: blockSize: aNumber ImproperCipherUse signal: 'AES does not support multiple block sizes; use Rijndael instead' Josh > Tomorrow. > Err, today. In the morning--wait. After some sleep. :) :-) Josh > > -- Tim > _______________________________________________ > Cryptography mailing list > Cryptography@... > http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/ > cryptography _______________________________________________ Cryptography mailing list Cryptography@... http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/cryptography |
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Re: [ENH] AES
by msh
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Funny how we get different things out of things we hear... I heard
"rain-doll" On Nov 24, 2006, at 3:12 PM, Cerebus wrote: > IIRC it's like "rhine-dahl." > > Here's a sound file: > > http://rijndael.info/audio/rijndael_pronunciation.wav > > -- Tim > _______________________________________________ > Cryptography mailing list > Cryptography@... > http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/ > cryptography _______________________________________________ Cryptography mailing list Cryptography@... http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/cryptography |
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Re: Re: [ENH] AES
by Cerebus
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On 11/25/06, Matthew S. Hamrick <mhamrick@...> wrote:
> Funny how we get different things out of things we hear... I heard > "rain-doll" All dose dang furriners tawk funny ennyways. (Damn it's hard to talk with your tongue in your cheek. :) -- Tim _______________________________________________ Cryptography mailing list Cryptography@... http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/cryptography |
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Re: Re: [ENH] AES
by Frank Shearar
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"Cerebus" <cerebus2@...> wrote:
> On 11/25/06, Matthew S. Hamrick <mhamrick@...> wrote: > > Funny how we get different things out of things we hear... I heard > > "rain-doll" > > All dose dang furriners tawk funny ennyways. > > (Damn it's hard to talk with your tongue in your cheek. :) I did like the FAQ entries on http://www.iaik.tu-graz.ac.at/research/krypto/AES/old/~rijmen/rijndael/. I'd fall under the "it's pronounced like you think it should be" category, being South African :) frank _______________________________________________ Cryptography mailing list Cryptography@... http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/cryptography |
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