PYTHON mcrypt_get_key_size

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PHP mcrypt_get_key_size

PHP original manual for mcrypt_get_key_size [ show | php.net ]

mcrypt_get_key_size

(PHP 4, PHP 5)

mcrypt_get_key_sizeGet the key size of the specified cipher

Description

int mcrypt_get_key_size ( int $cipher )
int mcrypt_get_key_size ( string $cipher , string $module )

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).

This example shows how to use this function when linked against libmcrypt 2.4.x and 2.5.x. It is more useful to use the mcrypt_enc_get_key_size() function as this uses the resource returned by mcrypt_module_open().

Example #1 mcrypt_get_block_size() example

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

Prints:
24

See also: mcrypt_get_block_size(), mcrypt_enc_get_key_size() and mcrypt_encrypt().