Date: Thu, 31 Jan 2013 09:54:06 +0400 From: Solar Designer <solar@...nwall.com> To: john-dev@...ts.openwall.com Subject: Re: NetNTLMv1 On Thu, Jan 31, 2013 at 09:03:00AM +0400, Solar Designer wrote: > I took a look. It's the last portion of the key, not block, that > contains only 2 bytes. The table can't be precomputed just once because > it depends on the challenge, but it can be precomputed in salt() (higher > memory usage) I have a quick and dirty implementation, storing the entire 512 KB table per salt. (This can be lowered by storing partial DES blocks - still sufficient to reject most password candidates.) I'll post benchmarks and patch shortly. > or set_salt() (lower memory usage, but also lower speed). I tried this too, the speed was way too low. We'd need to increase MAX_KEYS_PER_CRYPT a lot in order to go with this approach, and that will have performance impact on its own (keys not fitting in caches). Alexander
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