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Date: Sun, 01 Jun 2014 16:56:45 +0200
From: magnum <john.magnum@...hmail.com>
To: john-dev@...ts.openwall.com
Subject: Dupe crack detection
Solar,
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,
sizeof(int64));
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.
magnum
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