[Pharo-project] SSL/HTTPS - SecureSocketStream/SSLSessionforPharo/Squeak and other Smalltalk implementations

Nicolas Cellier nicolas.cellier.aka.nice at gmail.com
Sat May 14 13:27:11 CEST 2011

2011/5/14 Stéphane Ducasse <stephane.ducasse at inria.fr>:
> Here is what I suggest.
> - Keep a log of these fixes may be on the cog vm
> - did you publish your fixes using the git infrastructure we put in place - because without it we will not work.

No, this is just 3 or 4 methods to be change in VMMaker, no external C
code, only slang.

> - Write some tests

bitShift has tests, for Montgomery I don't remember, but that's easy.

> - Soon igor will resume his work on vm building with hudson and we should get some regression testing tests.
> - Soon we should be able to introduce these changes and evaluate their impact.
> - we should push the git infrastructure.

I just need a commit right in VMMaker if we want to push this.


> Stef
> On May 14, 2011, at 1:13 PM, Nicolas Cellier wrote:
>> 2011/5/14 Stéphane Ducasse <stephane.ducasse at inria.fr>:
>>>> I accelerated raisedTo:modulo: a bit with a primitive
>>>> (http://bugs.squeak.org/view.php?id=7120) but that's not enough
>>> Nicolas
>>> do you know why it was not integrated?
>>> It is a good candidate to check the build system of the VM and their evolution.
>>> Igor (I gave the windows distribution) to the arnaud so I hope that soon we will get a new windows slave for jenkins.
>>> Stef
>> Don't know. I also have my modest bitShift: improvments pending
>> (http://bugs.squeak.org/view.php?id=7109).
>> Maybe I haven't performed enough tests to assert the performance gain.
>> The changes are reliable, I run a VM with both improvments without
>> crash for months.
>> I could try to further improve the exponentiation algorithm by mixing
>> a sliding window exponentiation with Montgomery multiplication.
>> There would be other optimisations possible : each modular product
>> fits on a given number of bytes so we could recycle allocated
>> LargeInteger for storing intermediate results rather than letting vm
>> do it.
>> Nicolas

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