>properties</i>. See <a href="../man7/crypto.html">&quot;ALGORITHM FETCHING&quot; in crypto(7)</a> for further information.</p>

<p>See <a href="../man7/OSSL_PROVIDER-default.html">&quot;Message Authentication Code (MAC)&quot; in OSSL_PROVIDER-default(7)</a> for the list of algorithms supported by the default provider.</p>

<p>The returned value must eventually be freed with <a href="../man3/EVP_MAC_free.html">EVP_MAC_free(3)</a>.</p>

<p>EVP_MAC_up_ref() increments the reference count of an already fetched