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.\&quot;
.IX Title &quot;ENGINE 1&quot;
.TH ENGINE 1 &quot;2023-09-11&quot; &quot;1.1.1w&quot; &quot;OpenSSL&quot;
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.SH &quot;NAME&quot;
openssl\-engine, engine \- load and query engines
.SH &quot;SYNOPSIS&quot;
.IX Header &quot;SYNOPSIS&quot;
\&amp;\fBopenssl engine\fR
[ \fIengine...\fR ]
[\fB\-v\fR]
[\fB\-vv\fR]
[\fB\-vvv\fR]
[\fB\-vvv\fR]
[\fB\-vvv\fR]
[\fB\-c\fR]
[\fB\-t\fR]
[\fB\-tt\fR]
[\fB\-pre\fR \fIcommand\fR]
[\fB\-post\fR \fIcommand\fR]
[ \fIengine...\fR ]
.SH &quot;DESCRIPTION&quot;
.IX Header &quot;DESCRIPTION&quot;
The \fBengine\fR command is used to query the status and capabilities
of the specified \fBengine\fR's.
Engines may be specified before and after all other command-line flags.
Only those specified are queried.
.SH &quot;OPTIONS&quot;
.IX Header &quot;OPTIONS&quot;
.IP &quot;\fB\-v\fR \fB\-vv\fR \fB\-vvv\fR \fB\-vvvv\fR&quot; 4
.IX Item &quot;-v -vv -vvv -vvvv&quot;
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.
.IP &quot;\fB\-c\fR&quot; 4
.IX Item &quot;-c&quot;
Lists the capabilities of each engine.
.IP &quot;\fB\-t\fR&quot; 4
.IX Item &quot;-t&quot;
Tests if each specified engine is available, and displays the answer.
.IP &quot;\fB\-tt\fR&quot; 4
.IX Item &quot;-tt&quot;
Displays an error trace for any unavailable engine.
.IP &quot;\fB\-pre\fR \fIcommand\fR&quot; 4
.IX Item &quot;-pre command&quot;
.PD 0
.IP &quot;\fB\-post\fR \fIcommand\fR&quot; 4
.IX Item &quot;-post command&quot;
.PD
Command-line configuration of engines.
The \fB\-pre\fR command is given to the engine before it is loaded and
the \fB\-post\fR command is given after the engine is loaded.
The \fIcommand\fR is of the form \fIcmd:val\fR where \fIcmd\fR is the command,
and \fIval\fR is the value for the command.
See the example below.
.SH &quot;EXAMPLES&quot;
.IX Header &quot;EXAMPLES&quot;
To list all the commands available to a dynamic engine:
.PP
.Vb 10
\&amp; $ openssl engine \-t \-tt \-vvvv dynamic
\&amp; (dynamic) Dynamic engine loading support
\&amp;      [ unavailable ]
\&amp;      SO_PATH: Specifies the path to the new ENGINE shared library
\&amp;           (input flags): STRING
\&amp;      NO_VCHECK: Specifies to continue even if version checking fails (boolean)
\&amp;           (input flags): NUMERIC
\&amp;      ID: Specifies an ENGINE id name for loading
\&amp;           (input flags): STRING
\&amp;      LIST_ADD: Whether to add a loaded ENGINE to the internal list (0=no,1=yes,2=mandatory)
\&amp;           (input flags): NUMERIC
\&amp;      DIR_LOAD: Specifies whether to load from \*(AqDIR_ADD\*(Aq directories (0=no,1=yes,2=mandatory)
\&amp;           (input flags): NUMERIC
\&amp;      DIR_ADD: Adds a directory from which ENGINEs can be loaded
\&amp;           (input flags): STRING
\&amp;      LOAD: Load up the ENGINE specified by other settings
\&amp;           (input flags): NO_INPUT
.Ve
.PP
To list the capabilities of the \fIrsax\fR engine:
.PP
.Vb 4
\&amp; $ openssl engine \-c
\&amp; (rsax) RSAX engine support
\&amp;  [RSA]
\&amp; (dynamic) Dynamic engine loading support
.Ve
.SH &quot;ENVIRONMENT&quot;
.IX Header &quot;ENVIRONMENT&quot;
.IP &quot;\fB\s-1OPENSSL_ENGINES\s0\fR&quot; 4
.IX Item &quot;OPENSSL_ENGINES&quot;
The path to the engines directory.
.SH &quot;SEE ALSO&quot;
.IX Header &quot;SEE ALSO&quot;
\&amp;\fBconfig\fR\|(5)
.SH &quot;COPYRIGHT&quot;
.IX Header &quot;COPYRIGHT&quot;
Copyright 2016\-2019 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the OpenSSL license (the \*(L&quot;License\*(R&quot;).  You may not use
this file except in compliance with the License.  You can obtain a copy
in the file \s-1LICENSE\s0 in the source distribution or at
&lt;https://www.openssl.org/source/license.html&gt;.
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