php-doc-en/reference/mcrypt/functions/mcrypt-get-key-size.xml

<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.2 $ -->
<!-- splitted from ./en/functions/mcrypt.xml, last change in rev 1.2 -->
  <refentry id="function.mcrypt-get-key-size">
   <refnamediv>
    <refname>mcrypt_get_key_size</refname>
    <refpurpose>Get the key size of the specified cipher</refpurpose>
   </refnamediv>
   <refsect1>
    <title>Description</title>
     <methodsynopsis>
      <type>int</type><methodname>mcrypt_get_key_size</methodname>
      <methodparam><type>int</type><parameter>cipher</parameter></methodparam>
     </methodsynopsis>
     <methodsynopsis>
      <type>int</type><methodname>mcrypt_get_key_size</methodname>
      <methodparam><type>string</type><parameter>cipher</parameter></methodparam>
      <methodparam><type>string</type><parameter>module</parameter></methodparam>
     </methodsynopsis>
    <para>
     The first prototype is when linked against libmcrypt 2.2.x, the
     second when linked against libmcrypt 2.4.x.
    </para>
    <para>
     <function>mcrypt_get_key_size</function> is used to get the size
     of a key of the specified <parameter>cipher</parameter>.
    </para>
    <para>
     <function>mcrypt_get_key_size</function> takes one or two
     arguments, the <parameter>cipher</parameter> and
     <parameter>module</parameter>, and returns the size in bytes.
    </para> 
    <para>
     See also: <function>mcrypt_get_block_size</function>.
    </para>
   </refsect1>
  </refentry>

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