mcrypt_enc_get_supported_key_sizes
PHP function
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(PHP 4 >= 4.0.2, PHP 5, PHP 7 < 7.2.0, PECL mcrypt >= 1.0.0)
Returns an array with the supported keysizes of the opened algorithm
Removed-7-2-0
Description
mcrypt_enc_get_supported_key_sizes(resource $td): array
Gets the supported key sizes of the opened algorithm.
Parameters
tdThe 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
mcrypt_enc_get_supported_key_sizes() example
php
<?php
$td = mcrypt_module_open('rijndael-256', '', 'ecb', '');
var_dump(mcrypt_enc_get_supported_key_sizes($td));
?>The above example will output:
output
array(3) {
[0]=>
int(16)
[1]=>
int(24)
[2]=>
int(32)
}