john-users - Re: faster hash file loading

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Date: Mon, 4 Feb 2008 18:17:29 +0000 (UTC)
From:  helleye <jameskond@...mail.com>
To: john-users@...ts.openwall.com
Subject:  Re: faster hash file loading


thanks for your answer

leave alone for a second the I/O

if we look @ ldr_load_pw_line

if ((current_pw = db->password_hash[pw_hash]))
do {
	if (!memcmp(current_pw->binary, binary,
          format->params.binary_size) &&
        !strcmp(current_pw->source, piece)) {
	 if (!(db->options->flags & DB_WORDS) ||
         !strcmp(current_pw->login, login)) break;
	}
	} while ((current_pw = current_pw->next_hash)); 

if (current_pw) continue; 

looks like this one eliminate dupes
but it might cause square square complexity 
so if i can promise there arent dupes in the file
maybe add a flag -nodupes to the args and then to bypass this check ?
reducing complexity to linear

p.s
saw it does it in a big for (index = 0; index < count; index++) loop
i hope that i can just bypass this check and it wont hurt nothing else

thanks




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