cracklib-format
packer, cracklib-unpacker - cracklib dictionary utilities
see also :
cracklib-unpacker - cracklib-check - update-cracklib - create-cracklib-dict
Synopsis
cracklib-format
file ...
cracklib-packer
cracklib_dictpath
cracklib-unpacker
cracklib_dictpath
add an example, a script, a trick and tips
examples
source
use the cracklib-format and
cracklib-packer commands directly.
Options:
-o, --output <file> Alternative output file
for cracklib-packer
exec cracklib-format
"$@" | cracklib-packer ${output}
description
cracklib-format
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 cracklib-format 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/cracklib-format 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.
cracklib-format has a hook for this.
cracklib-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,
cracklib-unpacker(8), and
cracklib-check(8), utilities understand. The
number of words read and written are printed on
stdout(3).
cracklib-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
cracklib-format(8) and
cracklib-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
FascistCheck(3) and the constant CRACKLIB_DICTPATH
used to compile in the location of the cracklib dictionary
database for these utilities.
/usr/sbin/cracklib-format
cracklib shell script to create initial list of words for
dictionary database.
see also
FascistCheck,
cracklib-check ,
update-cracklib ,
create-cracklib-dict
/usr/share/doc/libcrack2/libcrack2.html
/usr/share/doc/cracklib-runtime/cracklib-runtime.html
author
cracklib2
is written by Alec Muffett
<alecm[:at:]crypto.dircon.co[:dot:]uk>. Manual added by Jean
Pierre LeJacq <jplejacq[:at:]quoininc[:dot:]com>.