_PKEY-FFC(7)</a>) the <b>DH</b> and <b>DHX</b> keytype implementation supports the following:</p>

<dl>

<dt id="type-OSSL_PKEY_PARAM_FFC_TYPE-UTF8-string">&quot;type&quot; (<b>OSSL_PKEY_PARAM_FFC_TYPE</b>) &lt;UTF8 string&gt;</dt>
<dd>

<p>Sets the type of parameter generation. For <b>DH</b> valid values are:</p>

<dl>

<dt id="fips186_4">&quot;fips186_4&quot;</dt>
<dd>

</dd>
<dt id="default">&quot;default&quot;</dt>
<dd>

</dd>
<dt id="fips186_2">&quot;fips186_2&quot;</dt>
<dd>

<p>These are described in