s</i>. The <b>X509_EXTENSION</b> objects must be explicitly freed using X509_EXTENSION_free().</p>

<h1 id="SUPPORTED-EXTENSIONS">SUPPORTED EXTENSIONS</h1>

<p>The following sections contain a list of all supported extensions including their name and NID.</p>

<h2 id="PKIX-Certificate-Extensions">PKIX Certificate Extensions</h2>

<p>The following certificate extensions are defined in PKIX standards such as RFC5280.</p>

<pre><code>Basic Constraints                  NID_basic_constraints
Key Usage           