A braindead program for cracking encrypted ZIP archives. Forked from http://oldhome.schmorp.de/marc/fcrackzip.html
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AUTHORS Import fcrackzip-1.0 from http://oldhome.schmorp.de/marc/fcrackzip.html Jun 20, 2013
COPYING Import fcrackzip-1.0 from http://oldhome.schmorp.de/marc/fcrackzip.html Jun 20, 2013
ChangeLog Import fcrackzip-1.0 from http://oldhome.schmorp.de/marc/fcrackzip.html Jun 20, 2013
INSTALL Import fcrackzip-1.0 from http://oldhome.schmorp.de/marc/fcrackzip.html Jun 20, 2013
Makefile.am Import fcrackzip-1.0 from http://oldhome.schmorp.de/marc/fcrackzip.html Jun 20, 2013
Makefile.in Import fcrackzip-1.0 from http://oldhome.schmorp.de/marc/fcrackzip.html Jun 20, 2013
NEWS Import fcrackzip-1.0 from http://oldhome.schmorp.de/marc/fcrackzip.html Jun 20, 2013
README Use libunzip instead of system() Jun 20, 2013
THANKS Import fcrackzip-1.0 from http://oldhome.schmorp.de/marc/fcrackzip.html Jun 20, 2013
TODO Import fcrackzip-1.0 from http://oldhome.schmorp.de/marc/fcrackzip.html Jun 20, 2013
aclocal.m4 Import fcrackzip-1.0 from http://oldhome.schmorp.de/marc/fcrackzip.html Jun 20, 2013
config.h.in Import fcrackzip-1.0 from http://oldhome.schmorp.de/marc/fcrackzip.html Jun 20, 2013
configure Import fcrackzip-1.0 from http://oldhome.schmorp.de/marc/fcrackzip.html Jun 20, 2013
configure.in Import fcrackzip-1.0 from http://oldhome.schmorp.de/marc/fcrackzip.html Jun 20, 2013
cpmask.c Import fcrackzip-1.0 from http://oldhome.schmorp.de/marc/fcrackzip.html Jun 20, 2013
crack.c Import fcrackzip-1.0 from http://oldhome.schmorp.de/marc/fcrackzip.html Jun 20, 2013
crack.h Import fcrackzip-1.0 from http://oldhome.schmorp.de/marc/fcrackzip.html Jun 20, 2013
crackdef.c Import fcrackzip-1.0 from http://oldhome.schmorp.de/marc/fcrackzip.html Jun 20, 2013
crc32.h Import fcrackzip-1.0 from http://oldhome.schmorp.de/marc/fcrackzip.html Jun 20, 2013
depcomp Import fcrackzip-1.0 from http://oldhome.schmorp.de/marc/fcrackzip.html Jun 20, 2013
fcrackzip.1 Import fcrackzip-1.0 from http://oldhome.schmorp.de/marc/fcrackzip.html Jun 20, 2013
fcrackzip.html Import fcrackzip-1.0 from http://oldhome.schmorp.de/marc/fcrackzip.html Jun 20, 2013
fcrackzip.txt Import fcrackzip-1.0 from http://oldhome.schmorp.de/marc/fcrackzip.html Jun 20, 2013
gencrack.pl Import fcrackzip-1.0 from http://oldhome.schmorp.de/marc/fcrackzip.html Jun 20, 2013
getopt.c Import fcrackzip-1.0 from http://oldhome.schmorp.de/marc/fcrackzip.html Jun 20, 2013
getopt.h Import fcrackzip-1.0 from http://oldhome.schmorp.de/marc/fcrackzip.html Jun 20, 2013
getopt1.c Import fcrackzip-1.0 from http://oldhome.schmorp.de/marc/fcrackzip.html Jun 20, 2013
install-sh Import fcrackzip-1.0 from http://oldhome.schmorp.de/marc/fcrackzip.html Jun 20, 2013
main.c Use libunzip instead of system() Jun 20, 2013
missing Import fcrackzip-1.0 from http://oldhome.schmorp.de/marc/fcrackzip.html Jun 20, 2013
mkinstalldirs Import fcrackzip-1.0 from http://oldhome.schmorp.de/marc/fcrackzip.html Jun 20, 2013
noradi.zip Import fcrackzip-1.0 from http://oldhome.schmorp.de/marc/fcrackzip.html Jun 20, 2013
zipcrack.c Import fcrackzip-1.0 from http://oldhome.schmorp.de/marc/fcrackzip.html Jun 20, 2013
zipinfo.c Import fcrackzip-1.0 from http://oldhome.schmorp.de/marc/fcrackzip.html Jun 20, 2013

README

Original README text follows below. This archive was originally copied
from http://oldhome.schmorp.de/marc/fcrackzip.html

The original program spawns an external unzip binary when checking
password guesses (with the -u option). This is extremely slow, so I've
modified the code to use libunzip instead. This speeds up guessing by
over a factor of 1000 on my laptop, even with SSD.

I built libunzip from the unzip-6.0 source. I believe this program is
largely obsoleted now if you have John the Ripper with the Jumbo patch.
In john-1.7.9-jumbo-7 you can just use zip2john and then run john.

  -- Howard Chu <hyc@symas.com>

##### Original below #####

See fcrackzip.txt (which is derived from the manpage), or fcrackzip.html

There is a web page with more information at
http://lehmann.home.ml.org/fcrackzip.html or
http://www.goof.com/pcg/marc/fcrackzip.html

A sample password-protected .zip file is included as "noradi.zip". It's
password has 6 lower case characters, and fcrackzip will find it (and a
number of false positives) with

fcrackzip -b -c a -p aaaaaa ./noradi.zip

which will take between one and thirty minutes on typical machines.

To find out which of these passwords is the right one either try them out
or use the --use-unzip option.

Marc