Date: Thu, 03 May 2012 02:12:43 +0200 From: magnum <john.magnum@...hmail.com> To: john-dev@...ts.openwall.com Subject: Re: New JtR functionality, re-build lost salts On 04/30/2012 11:27 PM, jfoug wrote: > I have added some code, that will allow john to find Password/Salts in > certain situations, if all that is available is the MD5 hash. Frequently, > in large hash lists, there are some of these salted hashes in there, but > with missing salts. This modification to JtR will allow these to be found > (albeit, pretty slowly). This is a curious patch, I haven't had time to try it out but I will later. A thing that hits me is this is a task a fast GPU format like raw-md5 could do very well, without the bandwidth problems it has otherwise... we just supply a fairly small buffer of words (perhaps just one word) and the GPU code generates all salts itself. But I guess it would need some support from the format interface. I suppose this patch as-is could be used with a slightly modified GPU format with less work, but then we'd have to transfer salts from CPU side. That is much lighter than transfering millions of keys though. magnum
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