Crack Functions

Introduktion

These functions allow you to use the CrackLib library to test the 'strength' of a password. The 'strength' of a password is tested by that checks length, use of upper and lower case and checked against the specified CrackLib dictionary. CrackLib will also give helpful diagnostic messages that will help 'strengthen' the password.

Note: This extension has been moved to the » PECL repository and is no longer bundled with PHP as of PHP 5.0.0.

Krav

More information regarding CrackLib along with the library can be found at » https://sourceforge.net/projects/cracklib.

Installation

This » PECL extension is not bundled with PHP. Information for installing this PECL extension may be found in the manual chapter titled Installation of PECL extensions. Additional information such as new releases, downloads, source files, maintainer information, and a CHANGELOG, can be located here: » https://pecl.php.net/package/crack.

In PHP 4 this PECL extensions source can be found in the ext/ directory within the PHP source or at the PECL link above. In order to use these functions you must compile PHP with Crack support by using the --with-crack[=DIR] configuration option.

Windows users will enable php_crack.dll inside of php.ini in order to use these functions. In PHP 4 this DLL resides in the extensions/ directory within the PHP Windows binaries download. The DLL for this PECL extension may be downloaded from either the » PHP Downloads page or from » https://pecl4win.php.net/

Konfiguration under drift

De här funktionernas beteende påverkas av inställningarna i php.ini.

**Crack configuration options**
Name	Default	Changeable	Changelog
crack.default_dictionary	NULL	PHP_INI_PERDIR	PHP_INI_SYSTEM in crack <= 0.2. Available since PHP 4.0.5. Removed in PHP 5.0.0.

For further details and definitions of the PHP_INI_* constants, see the php.ini directives.

Resurstyper

The CrackLib extension defines a dictionary resource identifier returned by crack_opendict().

Fördefinerade konstanter

Den här utbyggnaden har inte några konstanter definerade.

Exempel

This example shows how to open a CrackLib dictionary, test a given password, retrieve any diagnostic messages, and close the dictionary.

Example#1 CrackLib example


<?php
// Open CrackLib Dictionary
$dictionary = crack_opendict('/usr/local/lib/pw_dict')
     or die('Unable to open CrackLib dictionary');

// Perform password check
$check = crack_check($dictionary, 'gx9A2s0x');

// Retrieve messages
$diag = crack_getlastmessage();
echo $diag; // 'strong password'

// Close dictionary
crack_closedict($dictionary);
?>

Note: If crack_check() returns TRUE, crack_getlastmessage() will return 'strong password'.

crack_check — Performs an obscure check with the given password
crack_closedict — Closes an open CrackLib dictionary
crack_getlastmessage — Returns the message from the last obscure check
crack_opendict — Opens a new CrackLib dictionary