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<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.4 $ -->
<!-- splitted from ./en/functions/mcrypt.xml, last change in rev 1.7 -->
<refentry id="function.mcrypt-enc-get-supported-key-sizes">
<refnamediv>
<refname>mcrypt_enc_get_supported_key_sizes</refname>
<refpurpose>Returns an array with the supported keysizes of the opened algorithm</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<methodsynopsis>
<type>array</type><methodname>mcrypt_enc_get_supported_key_sizes</methodname>
<methodparam><type>resource</type><parameter>td</parameter></methodparam>
</methodsynopsis>
<para>
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
<function>mcrypt_enc_get_key_size</function> are supported by the
algorithm.
</para>
<para>
<example>
<title><function>mcrypt_enc_get_supported_key_sizes</function> example</title>
<programlisting role="php">
<![CDATA[
<?php
$td = mcrypt_module_open('rijndael-256', '', 'ecb', '');
var_dump(mcrypt_enc_get_supported_key_sizes($td));
?>
]]>
</programlisting>
<para>
This will print:
</para>
<screen>
<![CDATA[
array(3) {
[0]=>
int(16)
[1]=>
int(24)
[2]=>
int(32)
}
]]>
</screen>
</example>
</para>
</refsect1>
</refentry>
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