mcrypt_get_block_size

(PHP 4, PHP 5)

mcrypt_get_block_size — Gets the block size of the specified cipher

Description

int mcrypt_get_block_size ( int $cipher )
int mcrypt_get_block_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_block_size() is used to get the size of a block of the specified cipher (in combination with an encryption mode).

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

Parameters

cipher

One of the MCRYPT_ciphername constants or the name of the algorithm as string.

module

The module.

Return Values

Gets the block size, as an integer.

Examples

Example #1 mcrypt_get_block_size() example

This example shows how to use this function when linked against libmcrypt 2.4.x and 2.5.x.

<?php

echo mcrypt_get_block_size('tripledes', 'ecb'); // 8

?>

See Also