crack_mkdict(8)

NAME

crack_mkdict, crack_packer, crack_unpacker - cracklib dic

tionary utilities

SYNOPSIS

crack_mkdict file...
crack_packer cracklib_dictpath
crack_unpacker cracklib_dictpath

DESCRIPTION

crack_mkdict takes a list of text files each containing a

list of words, one per line, It lowercases all words, removes

control characters, and sorts the lists. It outputs the cleaned

up list to standard output. The text files may be optionally

compressed with gzip(1).

If you supply massive amounts of text to crack_mkdict you

must have enough free space available for use by the sort(1) com

mand. If you do not have 20Mb free in /var/tmp (or whatever tem

porary area your sort(1) command uses), have a look at the

/usr/sbin/crack_mkdict program which is a sh(1) program. You can

usually tweak the sort(1) command to use any large area of disk

you desire, by use of the -T option. crack_mkdict has a hook for

this.

crack_packer reads from standard input a list of sorted

and cleaned words and creates a database in the directory and

prefix given by the command line argument cracklib_dictpath.

Three files are created with the suffixes of .hwm, .pwd, and

.pwi. These three files are in the format that the

FascistCheck

crack_testnum(8), and crack_teststr(8) utilities understand. The number of words read and written are printed on stdout(3).
crack_unpacker reads from the database in the directory

and prefix given by the command line argument cracklib_dictpath

and outputs on standard output the list of words that make up the

database.

The database is in a binary format generated by the utili

ties crack_mkdict(8) and crack_packer(8). On a Debian system the

database is located in the directory /var/cache/cracklib/crack

lib_dict and is generated daily with the program /etc/cron.dai

ly/cracklib. The location is also defined in the header file

crack.h using the constant CRACKLIB_DICTPATH though none of the

subroutines in the cracklib libraries have this location hardcod

ed into their implementations.

FILES

/var/cache/cracklib/cracklib_dict.[hwm|pwd|pwi]

cracklib dictionary database files used by utili

ties.

/etc/cron.daily/cracklib

cracklib daily cron program to rebuild the cracklib

dictionary database.

/etc/cracklib/cracklib.conf

cracklib configuration file used by the cracklib

daily cron program to rebuild the cracklib dictionary database.

/usr/include/crack.h

cracklib header file defining the subroutine

FascistCheck(3)

pile in the location of the cracklib dictionary database for
these utilities.
/usr/sbin/crack_mkdict

cracklib shell script to create initial list of

words for dictionary database.

SEE ALSO

FascistCheck(3), crack_teststr(8), update-cracklib(8) /usr/share/doc/cracklib2/cracklib2.html
/usr/share/doc/cracklib-runtime/cracklib-runtime.html

AUTHOR

cracklib2 is written by Alec Muffett <alecm@cryp

to.dircon.co.uk>. Manual added by Jean Pierre LeJacq <jple

jacq@quoininc.com>.

2.7-8.5 Wed, 3 Oct 2001 01:37:09 +0100

crack_mkdict(8)