Content-type: text/html Man page of passlen

passlen

Section: C Library Functions (3)
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NAME

passlen - Determines minimum password length (Enhanced Security)  

LIBRARY

Security Library (libsecurity.a)  

SYNOPSIS

#include <sys/types.h> #include <sys/security.h> #include <prot.h>

int passlen(        time_t life_dur,
       time_t login_delay,
       int alphabet_size);
 

PARAMETERS

Specifies the password lifetime duration for an account (in seconds). Specifies the amount of time (in seconds) between login attempts. Specifies the number of distinct characters that can be used in a password.  

DESCRIPTION

The passlen() function takes the password lifetime duration life_dur for an account and the login_delay between login attempts, both values in seconds, and the alphabet_size of distinct characters, and returns the minimum password length according to the algorithm in the DoD Password Management Guideline (the Green Book). The parameter that specifies the probability of guessing a password is fixed to the value of 1 chance in a million.  

NOTES

If the life_dur or prob_guess parameters change in the protected password database for this account (or for the system default if those values are used in an account), it is a good idea to invalidate the password in case the new parameters require a longer minimum password length.

Programs using this function must be compiled with -lsecurity. delim off  

RELATED INFORMATION

Functions: randomword(3), exp(3), floor(3).

Commands: passwd(1). delim off


 

Index

NAME
LIBRARY
SYNOPSIS
PARAMETERS
DESCRIPTION
NOTES
RELATED INFORMATION

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Time: 02:42:14 GMT, October 02, 2010