pwqgen(1) [debian man page]

PWQGEN(1)						    BSD General Commands Manual 						 PWQGEN(1)

NAME

     pwqgen -- Generate quality controllable random passphrase

SYNOPSIS

     pwqgen [options]

DESCRIPTION

     The pwqgen program generates a random passphrase using the libpasswdqc library.  Strength of the generated passphrase depends on the amount
     of randomness read from /dev/urandom.

OPTIONS

     random=N
	     (default: random=47) The size of randomly-generated passphrase in bits (26 to 81).

     config=FILE
	     Load config FILE in the passwdqc.conf format.  This file may define any options described in passwdqc.conf(5), but only the random
	     and config options are honored by pwqgen.

     --version
	     Output pwqgen program version and exit.

     -h, --help
	     Output pwqgen help text and exit.

EXIT STATUS

     pwqgen exits with non-zero status when it encounters invalid config file, invalid option, invalid parameter value, when it fails to obtain
     enough randomness, and in any case when it fails to generate a passphrase.

FILES

     /etc/passwdqc.conf.

SEE ALSO

     pwqcheck(1), urandom(4), passwdqc.conf(5), pam_passwdqc(8).

     http://www.openwall.com/passwdqc/

AUTHORS

     The pam_passwdqc module was written for Openwall GNU/*/Linux by Solar Designer.  The pwqgen program was originally written for ALT
     GNU/*/Linux by Dmitry V. Levin, indirectly reusing code from pam_passwdqc (via libpasswdqc).  This manual page was written for Openwall
     GNU/*/Linux by Dmitry V. Levin.

Openwall Project						  March 13, 2010						  Openwall Project

PWQCHECK(1)						    BSD General Commands Manual 					       PWQCHECK(1)

NAME

     pwqcheck -- Check passphrase quality

SYNOPSIS

     pwqcheck [options]

DESCRIPTION

     The pwqcheck program checks passphrase quality using the libpasswdqc library.  By default, it expects to read 3 lines from standard input:

	   first line is a new password,
	   second line is an old password, and
	   third line is either an existing account name or a passwd(5) entry.

     There are a number of supported options, which can be used to control the pwqcheck behavior.

     pwqcheck prints OK on success.  Scripts invoking pwqcheck are suggested to check for both a zero exit status and the OK line.

OPTIONS

     min=N0,N1,N2,N3,N4
	     (default: min=disabled,24,11,8,7) The minimum allowed password lengths for different kinds of passwords/passphrases.  The keyword
	     disabled can be used to disallow passwords of a given kind regardless of their length.  Each subsequent number is required to be no
	     larger than the preceding one.

	     N0 is used for passwords consisting of characters from one character class only.  The character classes are: digits, lower-case let-
	     ters, upper-case letters, and other characters.  There is also a special class for non-ASCII characters, which could not be classi-
	     fied, but are assumed to be non-digits.

	     N1 is used for passwords consisting of characters from two character classes that do not meet the requirements for a passphrase.

	     N2 is used for passphrases.  Note that besides meeting this length requirement, a passphrase must also consist of a sufficient number
	     of words (see the passphrase option below).

	     N3 and N4 are used for passwords consisting of characters from three and four character classes, respectively.

	     When calculating the number of character classes, upper-case letters used as the first character and digits used as the last charac-
	     ter of a password are not counted.

	     In addition to being sufficiently long, passwords are required to contain enough different characters for the character classes and
	     the minimum length they have been checked against.

     max=N   (default: max=40) The maximum allowed password length.  This can be used to prevent users from setting passwords that may be too long
	     for some system services.	The value 8 is treated specially: if max is set to 8, passwords longer than 8 characters will not be
	     rejected, but will be truncated to 8 characters for the strength checks and the user will be warned.  This is to be used with the
	     traditional DES-based password hashes, which truncate the password at 8 characters.

	     It is important that you do set max=8 if you are using the traditional hashes, or some weak passwords will pass the checks.

     passphrase=N
	     (default: passphrase=3) The number of words required for a passphrase.

     match=N
	     (default: match=4) The length of common substring required to conclude that a password is at least partially based on information
	     found in a character string, or 0 to disable the substring search.  Note that the password will not be rejected once a weak substring
	     is found; it will instead be subjected to the usual strength requirements with the weak substring partially discounted.

	     The substring search is case-insensitive and is able to detect and remove a common substring spelled backwards.

     config=FILE
	     Load config FILE in the passwdqc.conf format.  This file may define any options described in passwdqc.conf(5), but only the min, max,
	     passphrase, match, and config options are honored by pwqcheck.

     -1      Read just 1 line (new passphrase).  This is needed to use pwqcheck as the passwordcheck program on OpenBSD - e.g., with ":password-
	     check=/usr/bin/pwqcheck -1:" in the "default" section in /etc/login.conf.

     -2      Read just 2 lines (new and old passphrases).

     --multi
	     Check multiple passphrases (until EOF).  This option may be used on its own or along with the -1 or -2 options.  pwqcheck will read
	     1, 2, or 3 lines and will output one line per passphrase to check.  The lines will start with either OK or a message explaining why
	     the passphrase did not pass the checks, followed by a colon and a space, and finally followed by the passphrase.  The explanatory
	     message is guaranteed to not include a colon.  With this option, the exit status of pwqcheck depends solely on whether there were any
	     errors preventing the strength of passphrases from being fully checked or not.  A primary use for this option is to test different
	     policies and/or different versions of passwdqc on large passphrase lists.

     --version
	     Output pwqcheck program version and exit.

     -h, --help
	     Output pwqcheck help text and exit.

EXIT STATUS

     pwqcheck exits with non-zero status when it encounters invalid config file, invalid option, invalid parameter value, invalid data in standard
     input, and in any case when it fails to check passphrase strength.  Without the --multi option, pwqcheck also exits with non-zero status when
     it detects a weak passphrase.

FILES

     /etc/passwdqc.conf.

SEE ALSO

     pwqgen(1), passwd(5), passwdqc.conf(5), pam_passwdqc(8).

     http://www.openwall.com/passwdqc/

AUTHORS

     The pam_passwdqc module was written for Openwall GNU/*/Linux by Solar Designer.  The pwqcheck program was originally written for ALT
     GNU/*/Linux by Dmitry V. Levin, indirectly reusing code from pam_passwdqc (via libpasswdqc).  This manual page (derived from the pam_passwdqc
     documentation) was written for Openwall GNU/*/Linux by Dmitry V. Levin.

Openwall Project						  March 15, 2010						  Openwall Project