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
설명
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.
Warning
이 함수는 실험적입니다. 이 함수의 작동, 함수의 이름, 그리고 관련된 모든 문서는 이후의 PHP 릴리즈에서 예고 없이 변경할 수 있습니다. 이 함수의 사용에 관한 것은 사용자 책임입니다.
인수
-
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.
반환값
Returns TRUE if password is strong, or FALSE otherwise.
변경점
| 버전 | 설명 |
|---|---|
| 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.");
}
}
?>
