crack_mkdict
NAME
crack_mkdict, crack_packer, crack_unpacker - cracklib dictionary utilities
SYNOPSIS
crack_mkdict
R file ...
crack_packer
R cracklib_dictpath
crack_unpacker
R 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)
command. If you do not have 20Mb free in /var/tmp (or whatever
temporary 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(3)
subroutine and
crack_unpacker,
crack_testlib(8),
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 utilities
crack_mkdict(8)
and
crack_packer(8).
On a Debian system the database is located in the directory
/var/cache/cracklib/cracklib_dict and is generated daily with the program
/etc/cron.daily/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 hardcoded into their implementations.
FILES
/var/cache/cracklib/cracklib_dict.[hwm|pwd|pwi]
cracklib dictionary database files used by utilities.
/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
R FascistCheck(3)
and the constant
CRACKLIB_DICTPATH
used to compile 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
AUTHOR
cracklib2
is written by Alec Muffett <alecm@crypto.dircon.co.uk>. Manual added
by Jean Pierre LeJacq <jplejacq@quoininc.com>.
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