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<p><a name="__index__"></a></p>
<ul>
<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>
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<p>
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<h1><a name="name">NAME</a></h1>
<p>openssl-engine,
engine - load and query engines</p>
<p>
</p>
<hr />
<h1><a name="synopsis">SYNOPSIS</a></h1>
<p><strong>openssl engine</strong>
[ <em>engine...</em> ]
[<strong>-v</strong>]
[<strong>-vv</strong>]
[<strong>-vvv</strong>]
[<strong>-vvv</strong>]
[<strong>-vvv</strong>]
[<strong>-c</strong>]
[<strong>-t</strong>]
[<strong>-tt</strong>]
[<strong>-pre</strong> <em>command</em>]
[<strong>-post</strong> <em>command</em>]
[ <em>engine...</em> ]</p>
<p>
</p>
<hr />
<h1><a name="description">DESCRIPTION</a></h1>
<p>The <strong>engine</strong> command is used to query the status and capabilities
of the specified <strong>engine</strong>'s.
Engines may be specified before and after all other command-line flags.
Only those specified are queried.</p>
<p>
</p>
<hr />
<h1><a name="options">OPTIONS</a></h1>
<dl>
<dt><strong><a name="v_vv_vvv_vvvv" class="item"><strong>-v</strong> <strong>-vv</strong> <strong>-vvv</strong> <strong>-vvvv</strong></a></strong></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><strong><a name="c" class="item"><strong>-c</strong></a></strong></dt>
<dd>
<p>Lists the capabilities of each engine.</p>
</dd>
<dt><strong><a name="t" class="item"><strong>-t</strong></a></strong></dt>
<dd>
<p>Tests if each specified engine is available, and displays the answer.</p>
</dd>
<dt><strong><a name="tt" class="item"><strong>-tt</strong></a></strong></dt>
<dd>
<p>Displays an error trace for any unavailable engine.</p>
</dd>
<dt><strong><a name="pre_command" class="item"><strong>-pre</strong> <em>command</em></a></strong></dt>
<dt><strong><a name="post_command" class="item"><strong>-post</strong> <em>command</em></a></strong></dt>
<dd>
<p>Command-line configuration of engines.
The <strong>-pre</strong> command is given to the engine before it is loaded and
the <strong>-post</strong> command is given after the engine is loaded.
The <em>command</em> is of the form <em>cmd:val</em> where <em>cmd</em> is the command,
and <em>val</em> is the value for the command.
See the example below.</p>
</dd>
</dl>
<p>
</p>
<hr />
<h1><a name="examples">EXAMPLES</a></h1>
<p>To list all the commands available to a dynamic engine:</p>
<pre>
$ 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</pre>
<p>To list the capabilities of the <em>rsax</em> engine:</p>
<pre>
$ openssl engine -c
(rsax) RSAX engine support
[RSA]
(dynamic) Dynamic engine loading support</pre>
<p>
</p>
<hr />
<h1><a name="environment">ENVIRONMENT</a></h1>
<dl>
<dt><strong><a name="openssl_engines" class="item"><strong>OPENSSL_ENGINES</strong></a></strong></dt>
<dd>
<p>The path to the engines directory.</p>
</dd>
</dl>
<p>
</p>
<hr />
<h1><a name="see_also">SEE ALSO</a></h1>
<p><em>config(5)</em></p>
<p>
</p>
<hr />
<h1><a name="copyright">COPYRIGHT</a></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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