Date: Tue, 19 Jan 2010 14:07:39 +0300 From: Solar Designer <solar@...nwall.com> To: announce@...ts.openwall.com Subject: [openwall-announce] JtR 18.104.22.168 and jumbo patch update Hi, John the Ripper version 22.214.171.124 is out, along with its corresponding jumbo patch update. This is another development version, and this time the focus was on performance improvements with very large password files or sets of files. http://www.openwall.com/john/ http://www.openwall.com/john/#contrib The changes since 1.7.4 are as follows: * Major performance improvements for processing of very large password files or sets of files, especially with salt-less or same-salt hashes, achieved primarily through introduction of two additional hash table sizes (64K and 1M entries), changes to the loader, and smarter processing of successful guesses (to accommodate getting thousands of hashes successfully cracked per second). * Many default buffer and hash table sizes have been increased and thresholds for the use of hash tables lowered, meaning that John will now tend to use more memory to achieve better speed (unless it is told not to with the "--save-memory" option). * Some previously missed common website passwords found on public lists of "top N passwords" have been added to the bundled common passwords list. * Some bugs introduced in 1.7.4 and affecting wordlist mode's elimination of consecutive duplicate candidate passwords have been fixed. The jumbo patches had many of the same performance bottlenecks addressed or worked around for a while. With this update, the performance improvements have been (re)implemented in an "official" manner and included into JtR itself, and a couple of additional bottlenecks have been addressed. Those interested in more detail may check the CVS commit messages at: http://cvsweb.openwall.com/john I was committing the changes one by one and with very descriptive commit messages. I added quite some source code comments, too. On a related note, support for "generic" MD5-based hashes (optionally salted or/and iterated) has been added to the jumbo patch (starting with 1.7.4-jumbo-2), due to code contributed by JimF. Previously, this existed as a separate "JimF patch", which one could apply on top of the jumbo patch. Enjoy, and please provide your feedback on the john-users list. Alexander
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