L_MAC_PARAM_DIGEST</b>) &lt;UTF8 string&gt;</dt>
<dd>

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

<p>For MAC implementations that use an underlying computation cipher or digest, these parameters set what the algorithm should be.</p>

<p>The value is always the name of the intended algorithm, or the properties.</p>

<p>Note that not all algorithms may support all digests. HMAC does not support variable output length