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&lt;title&gt;engine&lt;/title&gt;
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&lt;ul id=&quot;index&quot;&gt;
  &lt;li&gt;&lt;a href=&quot;#NAME&quot;&gt;NAME&lt;/a&gt;&lt;/li&gt;
  &lt;li&gt;&lt;a href=&quot;#SYNOPSIS&quot;&gt;SYNOPSIS&lt;/a&gt;&lt;/li&gt;
  &lt;li&gt;&lt;a href=&quot;#DESCRIPTION&quot;&gt;DESCRIPTION&lt;/a&gt;&lt;/li&gt;
  &lt;li&gt;&lt;a href=&quot;#OPTIONS&quot;&gt;OPTIONS&lt;/a&gt;&lt;/li&gt;
  &lt;li&gt;&lt;a href=&quot;#EXAMPLES&quot;&gt;EXAMPLES&lt;/a&gt;&lt;/li&gt;
  &lt;li&gt;&lt;a href=&quot;#ENVIRONMENT&quot;&gt;ENVIRONMENT&lt;/a&gt;&lt;/li&gt;
  &lt;li&gt;&lt;a href=&quot;#SEE-ALSO&quot;&gt;SEE ALSO&lt;/a&gt;&lt;/li&gt;
  &lt;li&gt;&lt;a href=&quot;#COPYRIGHT&quot;&gt;COPYRIGHT&lt;/a&gt;&lt;/li&gt;
&lt;/ul&gt;

&lt;h1 id=&quot;NAME&quot;&gt;NAME&lt;/h1&gt;

&lt;p&gt;openssl-engine, engine - load and query engines&lt;/p&gt;

&lt;h1 id=&quot;SYNOPSIS&quot;&gt;SYNOPSIS&lt;/h1&gt;

&lt;p&gt;&lt;b&gt;openssl engine&lt;/b&gt; [ &lt;i&gt;engine...&lt;/i&gt; ] [&lt;b&gt;-v&lt;/b&gt;] [&lt;b&gt;-vv&lt;/b&gt;] [&lt;b&gt;-vvv&lt;/b&gt;] [&lt;b&gt;-vvv&lt;/b&gt;] [&lt;b&gt;-vvv&lt;/b&gt;] [&lt;b&gt;-c&lt;/b&gt;] [&lt;b&gt;-t&lt;/b&gt;] [&lt;b&gt;-tt&lt;/b&gt;] [&lt;b&gt;-pre&lt;/b&gt; &lt;i&gt;command&lt;/i&gt;] [&lt;b&gt;-post&lt;/b&gt; &lt;i&gt;command&lt;/i&gt;] [ &lt;i&gt;engine...&lt;/i&gt; ]&lt;/p&gt;

&lt;h1 id=&quot;DESCRIPTION&quot;&gt;DESCRIPTION&lt;/h1&gt;

&lt;p&gt;The &lt;b&gt;engine&lt;/b&gt; command is used to query the status and capabilities of the specified &lt;b&gt;engine&lt;/b&gt;&amp;#39;s. Engines may be specified before and after all other command-line flags. Only those specified are queried.&lt;/p&gt;

&lt;h1 id=&quot;OPTIONS&quot;&gt;OPTIONS&lt;/h1&gt;

&lt;dl&gt;

&lt;dt id=&quot;v--vv--vvv--vvvv&quot;&gt;&lt;b&gt;-v&lt;/b&gt; &lt;b&gt;-vv&lt;/b&gt; &lt;b&gt;-vvv&lt;/b&gt; &lt;b&gt;-vvvv&lt;/b&gt;&lt;/dt&gt;
&lt;dd&gt;

&lt;p&gt;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.&lt;/p&gt;

&lt;/dd&gt;
&lt;dt id=&quot;c&quot;&gt;&lt;b&gt;-c&lt;/b&gt;&lt;/dt&gt;
&lt;dd&gt;

&lt;p&gt;Lists the capabilities of each engine.&lt;/p&gt;

&lt;/dd&gt;
&lt;dt id=&quot;t&quot;&gt;&lt;b&gt;-t&lt;/b&gt;&lt;/dt&gt;
&lt;dd&gt;

&lt;p&gt;Tests if each specified engine is available, and displays the answer.&lt;/p&gt;

&lt;/dd&gt;
&lt;dt id=&quot;tt&quot;&gt;&lt;b&gt;-tt&lt;/b&gt;&lt;/dt&gt;
&lt;dd&gt;

&lt;p&gt;Displays an error trace for any unavailable engine.&lt;/p&gt;

&lt;/dd&gt;
&lt;dt id=&quot;pre-command&quot;&gt;&lt;b&gt;-pre&lt;/b&gt; &lt;i&gt;command&lt;/i&gt;&lt;/dt&gt;
&lt;dd&gt;

&lt;/dd&gt;
&lt;dt id=&quot;post-command&quot;&gt;&lt;b&gt;-post&lt;/b&gt; &lt;i&gt;command&lt;/i&gt;&lt;/dt&gt;
&lt;dd&gt;

&lt;p&gt;Command-line configuration of engines. The &lt;b&gt;-pre&lt;/b&gt; command is given to the engine before it is loaded and the &lt;b&gt;-post&lt;/b&gt; command is given after the engine is loaded. The &lt;i&gt;command&lt;/i&gt; is of the form &lt;i&gt;cmd:val&lt;/i&gt; where &lt;i&gt;cmd&lt;/i&gt; is the command, and &lt;i&gt;val&lt;/i&gt; is the value for the command. See the example below.&lt;/p&gt;

&lt;/dd&gt;
&lt;/dl&gt;

&lt;h1 id=&quot;EXAMPLES&quot;&gt;EXAMPLES&lt;/h1&gt;

&lt;p&gt;To list all the commands available to a dynamic engine:&lt;/p&gt;

&lt;pre&gt;&lt;code&gt; $ 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 &amp;#39;DIR_ADD&amp;#39; 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&lt;/code&gt;&lt;/pre&gt;

&lt;p&gt;To list the capabilities of the &lt;i&gt;rsax&lt;/i&gt; engine:&lt;/p&gt;

&lt;pre&gt;&lt;code&gt; $ openssl engine -c
 (rsax) RSAX engine support
  [RSA]
 (dynamic) Dynamic engine loading support&lt;/code&gt;&lt;/pre&gt;

&lt;h1 id=&quot;ENVIRONMENT&quot;&gt;ENVIRONMENT&lt;/h1&gt;

&lt;dl&gt;

&lt;dt id=&quot;OPENSSL_ENGINES&quot;&gt;&lt;b&gt;OPENSSL_ENGINES&lt;/b&gt;&lt;/dt&gt;
&lt;dd&gt;

&lt;p&gt;The path to the engines directory.&lt;/p&gt;

&lt;/dd&gt;
&lt;/dl&gt;

&lt;h1 id=&quot;SEE-ALSO&quot;&gt;SEE ALSO&lt;/h1&gt;

&lt;p&gt;&lt;a href=&quot;../man5/config.html&quot;&gt;config(5)&lt;/a&gt;&lt;/p&gt;

&lt;h1 id=&quot;COPYRIGHT&quot;&gt;COPYRIGHT&lt;/h1&gt;

&lt;p&gt;Copyright 2016-2019 The OpenSSL Project Authors. All Rights Reserved.&lt;/p&gt;

&lt;p&gt;Licensed under the OpenSSL license (the &amp;quot;License&amp;quot;). 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 &lt;a href=&quot;https://www.openssl.org/source/license.html&quot;&gt;https://www.openssl.org/source/license.html&lt;/a&gt;.&lt;/p&gt;


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