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Message-ID: <48DA195E.9000800@banquise.net>
Date: Wed, 24 Sep 2008 12:41:34 +0200
From: Simon Marechal <simon@...quise.net>
To: john-users@...ts.openwall.com
Subject: Re: quite fast MD5 hashing implementation
Slythers Bro a écrit :
>
> in md5
> #define FF(a, b, c, d, x, s, ac) \
> {(a) += F ((b), (c), (d)) + (x) + (unsigned int)(ac); \
> (a) = ROTATE_LEFT ((a), (s)); \
> (a) += (b); \
> }
>
> in my opinion the two last line are the real "chaos" in md5
I fail to see the problem. You know a64,b64,c64,d64 at the last step.
You just have to do that:
a63 = a64 - b64;
a63 = ROTATE_RIGHT(a63, s);
a63 -= F(b64,c64,d64) + x + ac;
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