Date: Thu, 1 Sep 2005 15:27:13 +0200 From: dvorak <dvorak@...all.nl> To: john-users@...ts.openwall.com Subject: Re: Using john des routines for 3des (or straight des) cracking Some more questions: - Is there a reason in the LM cracker for setting the plain text everytime again? I see that the storage space is re-used to safe temporary values for the calculations, is this for cache reasons or merily to prevent having to write rounds(8) number of different s1..s8 blocks ? Or is the resetting an insignificant portion of the time. - Is it correct that the key setup for the LM hashes is some kind of efficient implementations that just sets the correct bits in the DES_bs_all.K array? It seems to be based on only restting the bits that are changed between old and new + some quick fixes to make all the passwords uppercase. - What is the significance of the DES_BS_VECTOR it seems one round uses the full mmx register width already, is this a cache optimazation? If so why is it always 2 for mmx? or is there some other reason entirely? thanks, dvorak
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