keylen</b> <i>num</i>] [<b>-out</b> <i>filename</i>] [<b>-binary</b>] [<b>-provider</b> <i>name</i>] [<b>-provider-path</b> <i>path</i>] [<b>-propquery</b> <i>propq</i>] <i>kdf_name</i></p>

<h1 id="DESCRIPTION">DESCRIPTION</h1>

<p>The key derivation functions generate a derived key from either a secret or password.</p>

<h1 id="OPTIONS">OPTIONS</h1>

<dl>

<dt id="help"><b>-help</b></dt>
<dd>

<p>Print a usage message.</p>

</dd>
<dt id="keylen-num"><b>-keylen</b> <i>num</i></dt>
<dd>

<p>The output size 