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Date: Sun, 24 Apr 2016 12:34:58 -0500
From: jfoug <jfoug@...nwall.net>
To: john-users@...ts.openwall.com
Subject: Re: Rules 'C' command, wtf???

NOTE, the same Mc type undocumented perversion is also in the 'c' rule.

Again, would this not be better to be handled by c=0M=1cT2  That way any 
of the other case name rules (mentioned below), could also have rules 
properly built for them.

On 4/24/2016 12:24 PM, jfoug wrote:
> case 'C':
>             {
>                 int pos = 0;
>                 if ((in[0] = conv_tolower[ARCH_INDEX(in[0])]))
>                 while (in[++pos])
>                     in[pos] =
>                         conv_toupper[ARCH_INDEX(in[pos])];
>                 in[pos] = 0;
>             }
>             if (in[0] == 'm' && in[1] == 'C')
>                 in[2] = conv_tolower[ARCH_INDEX(in[2])];
>             break;
>
> That is straight from core (jumbo is identical).
>
> From documentation:
>
> c    capitalize
> C    lowercase the first character, and uppercase the rest
>
> I do understand the why of the McXyz handling within C but it is not 
> documented that way, and there are other cases which would also fall 
> into this situation.  I really think this is the wrong place to put 
> this and that it would be better handled by a C=0m=1CT2 for this 
> special case, vs perverting the behavior of the C rule.  If we have 
> the Mc rule, then why note Mac, De, Di ?   I have also seen Aera, Bri 
> and some others start doing this common name double capitalizing.  BUT 
> should that be in the rule?  I think not.
>
> I did not find this obscure modification to the rule primitive, until 
> I started running lots of random rules, looking for duplication.  Well 
> I found one which was duplicate, but all of a sudden, I ended up with 
> something different, and was I was very surprised.  When I went 
> looking, I found this mCX being converted into mCx by the C rule.
>

-- 
Community volunteer for John the Ripper project.

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