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<ul id="index">
<li><a href="#NAME">NAME</a></li>
<li><a href="#SYNOPSIS">SYNOPSIS</a></li>
<li><a href="#DESCRIPTION">DESCRIPTION</a></li>
<li><a href="#OPTIONS">OPTIONS</a></li>
<li><a href="#EXAMPLES">EXAMPLES</a></li>
<li><a href="#ENVIRONMENT">ENVIRONMENT</a></li>
<li><a href="#SEE-ALSO">SEE ALSO</a></li>
<li><a href="#COPYRIGHT">COPYRIGHT</a></li>
</ul>
<h1 id="NAME">NAME</h1>
<p>openssl-engine, engine - load and query engines</p>
<h1 id="SYNOPSIS">SYNOPSIS</h1>
<p><b>openssl engine</b> [ <i>engine...</i> ] [<b>-v</b>] [<b>-vv</b>] [<b>-vvv</b>] [<b>-vvv</b>] [<b>-vvv</b>] [<b>-c</b>] [<b>-t</b>] [<b>-tt</b>] [<b>-pre</b> <i>command</i>] [<b>-post</b> <i>command</i>] [ <i>engine...</i> ]</p>
<h1 id="DESCRIPTION">DESCRIPTION</h1>
<p>The <b>engine</b> command is used to query the status and capabilities of the specified <b>engine</b>'s. Engines may be specified before and after all other command-line flags. Only those specified are queried.</p>
<h1 id="OPTIONS">OPTIONS</h1>
<dl>
<dt id="v--vv--vvv--vvvv"><b>-v</b> <b>-vv</b> <b>-vvv</b> <b>-vvvv</b></dt>
<dd>
<p>Provides information about each specified engine. The first flag lists all the possible run-time control commands; the second adds a description of each command; the third adds the input flags, and the final option adds the internal input flags.</p>
</dd>
<dt id="c"><b>-c</b></dt>
<dd>
<p>Lists the capabilities of each engine.</p>
</dd>
<dt id="t"><b>-t</b></dt>
<dd>
<p>Tests if each specified engine is available, and displays the answer.</p>
</dd>
<dt id="tt"><b>-tt</b></dt>
<dd>
<p>Displays an error trace for any unavailable engine.</p>
</dd>
<dt id="pre-command"><b>-pre</b> <i>command</i></dt>
<dd>
</dd>
<dt id="post-command"><b>-post</b> <i>command</i></dt>
<dd>
<p>Command-line configuration of engines. The <b>-pre</b> command is given to the engine before it is loaded and the <b>-post</b> command is given after the engine is loaded. The <i>command</i> is of the form <i>cmd:val</i> where <i>cmd</i> is the command, and <i>val</i> is the value for the command. See the example below.</p>
</dd>
</dl>
<h1 id="EXAMPLES">EXAMPLES</h1>
<p>To list all the commands available to a dynamic engine:</p>
<pre><code> $ openssl engine -t -tt -vvvv dynamic
(dynamic) Dynamic engine loading support
[ unavailable ]
SO_PATH: Specifies the path to the new ENGINE shared library
(input flags): STRING
NO_VCHECK: Specifies to continue even if version checking fails (boolean)
(input flags): NUMERIC
ID: Specifies an ENGINE id name for loading
(input flags): STRING
LIST_ADD: Whether to add a loaded ENGINE to the internal list (0=no,1=yes,2=mandatory)
(input flags): NUMERIC
DIR_LOAD: Specifies whether to load from 'DIR_ADD' directories (0=no,1=yes,2=mandatory)
(input flags): NUMERIC
DIR_ADD: Adds a directory from which ENGINEs can be loaded
(input flags): STRING
LOAD: Load up the ENGINE specified by other settings
(input flags): NO_INPUT</code></pre>
<p>To list the capabilities of the <i>rsax</i> engine:</p>
<pre><code> $ openssl engine -c
(rsax) RSAX engine support
[RSA]
(dynamic) Dynamic engine loading support</code></pre>
<h1 id="ENVIRONMENT">ENVIRONMENT</h1>
<dl>
<dt id="OPENSSL_ENGINES"><b>OPENSSL_ENGINES</b></dt>
<dd>
<p>The path to the engines directory.</p>
</dd>
</dl>
<h1 id="SEE-ALSO">SEE ALSO</h1>
<p><a href="../man5/config.html">config(5)</a></p>
<h1 id="COPYRIGHT">COPYRIGHT</h1>
<p>Copyright 2016-2019 The OpenSSL Project Authors. All Rights Reserved.</p>
<p>Licensed under the OpenSSL license (the "License"). You may not use this file except in compliance with the License. You can obtain a copy in the file LICENSE in the source distribution or at <a href="https://www.openssl.org/source/license.html">https://www.openssl.org/source/license.html</a>.</p>
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