Date: Sun, 25 Mar 2012 11:59:11 +0200 From: magnum <john.magnum@...hmail.com> To: john-dev@...ts.openwall.com Subject: Re: [JtR patch] Fast cracker for Mozilla Firefox, Thunderbird and SeaMonkey master passwords. On 03/25/2012 01:50 AM, Solar Designer wrote: > On Sat, Mar 24, 2012 at 01:12:53PM +0100, magnum wrote: >> On 03/24/2012 10:25 AM, Dhiru Kholia wrote: >>> However, I am getting the following warnings during compilation from >>> the DES code. Can someone take a look and fix them? Thanks! >>> >>> mozilla_des.c: In function ?DES_CBCEn?: >>> mozilla_des.c:751:2: warning: dereferencing type-punned pointer will >>> break strict-aliasing rules [-Wstrict-aliasing] >> >> This is more of a follow-up question than an answer :) >> >> The enclosed patch mutes the warnings. Why are the braces needed and >> what are they "doing"? The format seem to work fine with this patch. > > How did you arrive at the braces? This is weird stuff. I am not even > sure how to parse it (would need to do actual testing to see how gcc > treats it) - I think this may be either an array initializer or GCC's > "Statement Exprs" extension (although then you'd probably be required to > include a semicolon before the closing curly brace, so this is probably > not it). I saw braces used like that in an example somewhere. I have no idea what they do, hence my question :) Maybe it's better to live with the (harmless) warnings until we know for sure. magnum
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