load dynamic ENGINEs from shared libraries (DSOs). However, very few applications currently support the control interface and so very few can load and use dynamic ENGINEs. Equally in future more sophisticated ENGINEs will require certain control operations to customize them. If an application calls OPENSSL_config() it doesn&#39;t need to know or care about ENGINE control operations because they can be performed by editing a configuration file.</p>

<h1 id="ENVIRONMENT">ENVIRONMENT</h1>

<dl>

<dt id="OPENSS