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Date: Wed, 11 Jan 2012 04:49:42 +0400
From: Solar Designer <solar@...nwall.com>
To: john-users@...ts.openwall.com
Subject: Re: official JtR or jumbo for RAR?

On Tue, Jan 10, 2012 at 12:25:33PM -0500, Chuck Kahn wrote:
> ... If "RAR -p mode
> support" refers to incomplete support of the "p" (password) switch of the
> RAR command, does that mean jumbo can't crack RAR passwords?

-jumbo can crack passwords for RAR archives encrypted with the "-hp"
option, but not yet for those encrypted with the "-p" option.  These two
options are briefly described here:

http://blog.zorinaq.com/?e=15

"There are 2 different ways to encrypt a RAR archive; the rar CLI tool
exposes them through 2 options:

    * -p option, which encrypts only the content of the files in the
archive, while file metadata (filenames...) are not encrypted
    * -hp option, which encrypts the internal block headers that contain
file metadata, as well as the content of the files"

You may download sample RAR archives to crack with -jumbo here:

http://openwall.info/wiki/john/sample-non-hashes#RAR

Alexander

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