mcrypt_get_key_size

(PHP 4, PHP 5, PHP 7 < 7.2.0, PECL mcrypt >= 1.0.0)

mcrypt_get_key_sizeGets the key size of the specified cipher

Avertizare

This function has been DEPRECATED as of PHP 7.1.0. Relying on this function is highly discouraged.

Descrierea

mcrypt_get_key_size ( int $cipher ) : int
mcrypt_get_key_size ( string $cipher , string $mode ) : int

The first prototype is when linked against libmcrypt 2.2.x, the second when linked against libmcrypt 2.4.x or 2.5.x.

mcrypt_get_key_size() is used to get the size of a key of the specified cipher (in combination with an encryption mode).

It is more useful to use the mcrypt_enc_get_key_size() function as this uses the resource returned by mcrypt_module_open().

Parametri

cipher

Una din constantele MCRYPT_ciphername sau denumirea algoritmului ca șir de caractere.

mode

Una din constantele MCRYPT_MODE_modename sau unul din șirurile de caractere: "ecb", "cbc", "cfb", "ofb", "nofb" sau "stream".

Valorile întoarse

Returns the maximum supported key size of the algorithm in bytes sau FALSE în cazul eșecului.

Exemple

Example #1 mcrypt_get_key_size() Example

<?php
    
echo mcrypt_get_key_size('tripledes''ecb');
?>

The example above shows how to use this function when linked against libmcrypt 2.4.x or 2.5.x.

Exemplul de mai sus va afișa:

24

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