In addition to the usual checks crack can also check for similarities between the password and a username and gecos field (the gecos field normally contains the person's full name on unix systems).
There is a third format for the function call which supplies these additional parameters:
bool crack_check (string $password, string $username, string $gecos, resource $dictionary)
This is true of PECL crack version 0.4, I'm not sure about earlier versions.
crack_check
(PECL crack >= 0.1)
crack_check — Performs an obscure check with the given password
Опис
bool crack_check
( resource
$dictionary
, string $password
)
bool crack_check
( string
$password
, string $username = ""
, string $gecos = ""
, resource $dictionary = NULL
)Performs an obscure check with the given password on the specified dictionary. The alternative signature also takes into account the username and the GECOS information.
Увага
This function is EXPERIMENTAL. The behaviour of this function, its name, and surrounding documentation may change without notice in a future release of PHP. This function should be used at your own risk.
Параметри
-
dictionary -
The crack lib dictionary. If not specified, the last opened dictionary is used.
-
password -
The password to be checked.
-
username -
The username of the account with the password.
-
gecos -
The GECOS information associated with the user account.
Значення, що повертаються
Returns TRUE if password is strong, or FALSE otherwise.
Журнал Змін
| Версія | Опис |
|---|---|
| 0.3 |
The username, gecos and
dictionary parameters were added to the
alternative signature.
|
add a note
User Contributed Notes 2 notes
Anonymous ¶
14 years ago
vkontakte at mralston dot com ¶
14 years ago
If you need to test a password with cracklib but don't have the necessary module available in PHP, you can use a function like this.
It requires the command line cracklib-check binary in /usr/sbin, but changing its location is trivial.
The $message variable will contain cracklib's complaint (if there is one)
You'll want to wrap your invocation of this function in a try...catch block.
<?php
function cracklibCheck($password, &$message)
{
// Clean up password
$password=str_replace("\r", "", $password);
$password=str_replace("\n", "", $password);
// Run password through cracklib-check
exec("echo ".escapeshellarg($password)." | /usr/sbin/cracklib-check 2>/dev/null", $output, $return_var);
// Check it ran properly
if($return_var==0)
{
if(preg_match("/^.*\: ([^:]+)$/", $output[0], $matches))
{
// Check response
if(strtoupper($matches[1])=="OK")
{
// Password is strong
$message="";
return(true);
}
else
{
// Cracklib doesn't like it
$message=$matches[1];
return(false);
}
}
else
{
// Badly formatted response from cracklib-check.
throw new Exception("Didn't understand cracklib-check response.");
}
}
else
{
// Some sort of execution error
throw new Exception("Failed to run cracklib-check.");
}
}
?>
