mcrypt_enc_get_supported_key_sizes
(PHP 4 >= 4.0.2, PHP 5)
mcrypt_enc_get_supported_key_sizes — Returns an array with the supported keysizes of the opened algorithm
Description
array mcrypt_enc_get_supported_key_sizes
( resource $td
)
Gets the supported key sizes of the opened algorithm.
Parameters
- td
-
The encryption descriptor.
Return Values
Returns an array with the key sizes supported by the algorithm specified by the encryption descriptor. If it returns an empty array then all key sizes between 1 and mcrypt_enc_get_key_size() are supported by the algorithm.
Examples
Example #1 mcrypt_enc_get_supported_key_sizes() example
<?php
$td = mcrypt_module_open('rijndael-256', '', 'ecb', '');
var_dump(mcrypt_enc_get_supported_key_sizes($td));
?>
This will print:
array(3) {
[0]=>
int(16)
[1]=>
int(24)
[2]=>
int(32)
}