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From: =?utf-8?Q?Yannick_Duch=C3=AAne_=28Hibou57?=
 =?utf-8?Q?=29?=
 <yannick_duchene@yahoo.fr>
Newsgroups: comp.lang.ada
Subject: Re: SPARKSkein released
Date: Mon, 16 Aug 2010 18:18:02 +0200
Organization: Ada At Home
Message-ID: <op.vhjgwcq1ule2fv@garhos>
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Date: 2010-08-16T18:18:02+02:00
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Le Mon, 16 Aug 2010 09:37:59 +0200, Rod Chapman  =

<roderick.chapman@googlemail.com> a =C3=A9crit:

> Altran Praxis and AdaCore have released SPARKSkein - a new reference
> implementation of Skein-512 written and verified using the SPARK
> language and toolset. In particular, this release includes a complete
> proof of type-safety for the implementation, test cases for structural=

> coverage, performance, and the reference test vectors from the Skein
> specification. Performance is very close to that of the C reference
> implementation.
>
> Check it out at www.skein-hash.info
>
> There's also a technical paper describing the implementation and
> results, available from
> the same place.
>
>  - Rod Chapman, SPARK Team, Altran Praxis

Was useful:
http://www.skein-hash.info/sites/default/files/SPARKSkein.pdf
says
> [...]
> 4.1.1 Prover says no=E2=80=A6a bug is discovered
> The subprogram Skein_512_Final caused someproblems, and led to the  =

> discovery of a subtle
> corner-case bug.
> [...]