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Date: Sun, 01 Jun 2014 16:56:45 +0200
From: magnum <>
Subject: Dupe crack detection


These lines in cracker.c:

static int crk_process_guess(struct db_salt *salt, struct db_password *pw,
         int index)
         int dupe;
         char *key;

         dupe = !memcmp(&crk_timestamps[index], &status.crypts, 
         crk_timestamps[index] = status.crypts;

What is that 'dupe' thing about? I always thought that it would detect 
dupe cracks of same password within the same batch of keys - that is, we 
actually got the same candidate in eg. index 0 and index 2. But now that 
I look closer I think it can't do that. So what is it for? Could 
crk_process_guess() sometimes be called twice for the same batch and index?

And back to that "dupe within a batch": Do we not have any such 
suppression? I always thought we had, but we're seeing "1501 cracked out 
of 1500" in a test case.


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