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FascistCheck

FascistCheck

Section: Debian GNU/Linux manual (3) Updated: Wed, 3 Oct 2001 01:37:09 +0100
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NAME

FascistCheck - a pro-active password checker library  

SYNOPSIS

#include <crack.h>

static char const CRACKLIB_DICTPATH[] =  ...;

extern char const *
FascistCheck(char const passwd[], char const dictpath[]);  

DESCRIPTION

cracklib is a library containing the FascistCheck C function which may be used in a "passwd" like program. The idea is simple: try to prevent users from choosing passwords that could be guessed by "crack" by filtering them out, at source. cracklib is an offshoot of the the version 5 of the "crack" software and contains a considerable number of ideas nicked from the new software.

The first formal argument password is the potential password. The second formal argument dictpath is the full path name + filename prefix of the cracklib dictionary database. FascistCheck returns the NULL pointer for a good password, or a pointer to a diagnostic string if it is a weak password.

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 defined by the static constant CRACKLIB_DICTPATH and is set to /var/cache/cracklib/cracklib_dict. None of the subroutines in the cracklib libraries have this location hard-coded into their implementations. It is generated daily with the program /etc/cron.daily/cracklib.  

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/sbin/crack_mkdict
cracklib shell script to create initial list of words for dictionary database.
/usr/share/doc/cracklib2-dev/examples
Example cc(1) source files that show how FascistCheck is used.
 

SEE ALSO

crack_teststr(8), crack_mkdict(8), update-cracklib(8)
/usr/share/doc/cracklib2-dev/examples
/usr/share/doc/cracklib2/cracklib2.html
/usr/share/doc/cracklib2-dev/cracklib2-dev.html  

AUTHOR

cracklib2 is written by Alec Muffett <alecm@crypto.dircon.co.uk>. Manual added by Jean Pierre LeJacq <jplejacq@quoininc.com>.


 

Index

NAME
SYNOPSIS
DESCRIPTION
FILES
SEE ALSO
AUTHOR

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Time: 21:43:53 GMT, April 16, 2011