entations of the same algorithms), the property &quot;provider=legacy&quot; can be used as a search criterion for these implementations.</p>

<p>See <a href="../man7/OSSL_PROVIDER-legacy.html">OSSL_PROVIDER-legacy(7)</a>.</p>

<h2 id="Null-provider">Null provider</h2>

<p>The null provider is built in as part of the <i>libcrypto</i> library. It contains no algorithms in it at all. When fetching algorithms the default provider will be automatically loaded if no other provider has been explicitly loaded. To p