Date: Mon, 10 Sep 2012 17:21:11 +0200 From: magnum <john.magnum@...hmail.com> To: john-dev@...ts.openwall.com Subject: Re: Cracking Office 2013 files with JtR On 2012-09-04 04:09, Dhiru Kholia wrote: > On Mon, Sep 3, 2012 at 11:47 PM, magnum <john.magnum@...hmail.com> > wrote: >> On 3 Sep, 2012, at 18:11 , Dhiru Kholia <dhiru.kholia@...il.com> >> wrote: >>> Note: To be really usable, we need an OpenCL implementation. >>> magnum, Lukas? >> >> I could give it a shot. It gets complicated as you support three >> different types in one format (although that's easier for the >> user). >> >> So 2013 is SHA512 + AES and 2010 is SHA1 + AES, right? And, um... >> 2007 is also SHA1 + AES but using another scheme? I could start >> with 2007/2010 I guess. > > Correct. Starting with 2007 or 2010 sounds like a good plan. Only > fast SHA1 OpenCL implementation is required then. Prepearing for the OpenCL version, I started looking into this format and found a fatal memory leak in Office 2007 as well as some obvious optimizations in all versions. They did not affect performance much (not in inner loop) but there were alloc/free's and memcpy/memmove's which I try to squat when possible - and it did not affect readability much. Fixes are committed. magnum
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