Date: Sun, 10 Feb 2013 02:41:33 +0100 From: magnum <john.magnum@...hmail.com> To: john-users@...ts.openwall.com Subject: Re: SSHA-512 supported? On 9 Feb, 2013, at 9:36 , Frank Dittrich <frank_dittrich@...mail.com> wrote: > Before I gave up yesterday, I even changed ROUNDS_DEFAULT to 64 and > ROUNDS_MIN to 1, with no luck. > It could also be an off-by-one error, number of rounds being 2^6 + 1. > > They could even treat 1000 SHA-512 iteration as one iteration, so that > we have 64000 iterations. > > My next bet would be on the password being UTF-16 encoded (big endian). > Unfortunately, I don't have time to test this right now. I half-heartedly tried UTF-16BE with 64, 65, 64000, 64001, 65536 and 65537 iterations - no luck. I have a feeling this is not like Drepper's sha2crypt at all though. What year did they come up with this thing? Maybe it's just iterated SHA-512 with no/less/other magic? Or maybe it's actually PBKDF2-HMAC-SHA512. Or just HMAC, for that matter. Or maybe it more closely resembles crypt-md5, but using SHA-2. magnum
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