ctx_params">with OSSL_FUNC_set_ctx_params():</dt>
<dd>

<dl>

<dt id="key-OSSL_MAC_PARAM_KEY-octet-string">&quot;key&quot; (<b>OSSL_MAC_PARAM_KEY</b>) &lt;octet string&gt;</dt>
<dd>

<p>Sets the key in the associated MAC ctx. This is identical to passing a <i>key</i> argument to the OSSL_FUNC_mac_init() function.</p>

</dd>
</dl>

</dd>
<dt id="with-OSSL_FUNC_get_params">with OSSL_FUNC_get_params():</dt>
<dd>

<dl>

<dt id="size-OSSL_MAC_PARAM_SIZE-integer">&quot;size&quot; (<b>OSSL_MAC_PARAM_SIZE</b>) &lt;