john-dev - ETA for incremental

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Message-ID: <20110604175237.GA4882@openwall.com>
Date: Sat, 4 Jun 2011 21:52:37 +0400
From: Solar Designer <solar@...nwall.com>
To: john-dev@...ts.openwall.com
Subject: ETA for incremental

magnum -

In my testing, the ETAs are misleading:

$ ./john -i pw
Using phpass mode, by linking to md5_gen(17) functions
Loaded 7 password hashes with 7 different salts (PHPass MD5 [phpass-MD5 MMX])
guesses: 0  time: 0:00:00:01 0.00% (ETA >Sun Jun  5 00:15:43 2011)  c/s: 289  trying: 1211 - mikki
guesses: 0  time: 0:00:00:05 0.00% (ETA >Sun Jun  5 11:29:07 2011)  c/s: 323  trying: 48680309 - 48884636
guesses: 0  time: 0:00:00:15 0.00% (ETA >Mon Jun  6 15:32:36 2011)  c/s: 332  trying: moopy - molfe
guesses: 0  time: 0:00:00:19 0.00% (ETA >Tue Jun  7 02:46:01 2011)  c/s: 332  trying: shells - marren
guesses: 0  time: 0:00:00:37 0.00% (ETA >Thu Jun  9 05:16:18 2011)  c/s: 340  trying: shilley - shilen1
guesses: 0  time: 0:00:01:35 0.00% (ETA >Thu Jun 16 00:00:37 2011)  c/s: 347  trying: moreter - moodles
guesses: 0  time: 0:00:08:03 0.00% (ETA >Sun Jul 31 08:40:29 2011)  c/s: 337  trying: shalo1 - shello
guesses: 0  time: 0:00:08:59 0.00% (ETA >Sat Aug  6 21:48:06 2011)  c/s: 339  trying: asagar - bordit
guesses: 0  time: 0:00:09:52 0.00% (ETA >Sat Aug 13 02:30:38 2011)  c/s: 339  trying: mathia - maggly
guesses: 0  time: 0:00:16:59 0.00% (ETA >Sun Oct  2 00:36:10 2011)  c/s: 337  trying: allay - allys

At this speed, this session is supposed to terminate in about 4 million
years (if nothing gets cracked), which could probably be determined
after just a few seconds of running (once the c/s rate is known).
Rather than say that ETA is beyond some date in 2011, perhaps John
should detect this typical case and say "ETA: never" or something like
that?  Also, where do the dates in 2011 come from?  Some overflow bug?

Thanks,

Alexander

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