array ( 0 => 'index.php', 1 => 'PHP Manual', ), 'head' => array ( 0 => 'UTF-8', 1 => 'es', ), 'this' => array ( 0 => 'function.mcrypt-get-key-size.php', 1 => 'mcrypt_get_key_size', ), 'up' => array ( 0 => 'ref.mcrypt.php', 1 => 'Mcrypt Funciones', ), 'prev' => array ( 0 => 'function.mcrypt-get-iv-size.php', 1 => 'mcrypt_get_iv_size', ), 'next' => array ( 0 => 'function.mcrypt-list-algorithms.php', 1 => 'mcrypt_list_algorithms', ), 'alternatives' => array ( ), 'source' => array ( 'lang' => 'en', 'path' => 'reference/mcrypt/functions/mcrypt-get-key-size.xml', ), ); $setup["toc"] = $TOC; $setup["toc_deprecated"] = $TOC_DEPRECATED; $setup["parents"] = $PARENTS; manual_setup($setup); ?>
(PHP 4, PHP 5, PHP 7 < 7.2.0, PECL mcrypt >= 1.0.0)
mcrypt_get_key_size — Gets the key size of the specified cipher
Esta función ha sido declarada OBSOLETA a partir de PHP 7.1.0 y será ELIMINADA a partir de PHP 7.2.0. Su uso está totalmente desaconsejado.
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().
cipher
Una de las constantes MCRYPT_nombredelcifrado
, o el nombre del algoritmo como string.
mode
Una de las constantes MCRYPT_MODE_nombredelmodo
, o una de las siguientes strings: "ecb", "cbc", "cfb", "ofb", "nofb" o "stream".
Returns the maximum supported key size of the algorithm in bytes
o false
en caso de error.
Ejemplo #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.
El resultado del ejemplo sería:
24