mcrypt_get_iv_size
While not specified in the description, this function, just like mcrypt_enc_get_key_size(), returns the cipher's largest key size in BYTES.
mcrypt_get_key_size
(PHP 4, PHP 5)
mcrypt_get_key_size — Get 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_key_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().
add a note
User Contributed Notesmcrypt_get_key_size
Robin
09-Mar-2010 01:43
09-Mar-2010 01:43