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

说明

array mcrypt_enc_get_supported_key_sizes ( resource $td )

Gets the supported key sizes of the opened algorithm.

参数

td: The encryption descriptor.

返回值

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.

范例

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));
?>

以上例程会输出：

array(3) {
  [0]=>
  int(16)
  [1]=>
  int(24)
  [2]=>
  int(32)
}