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.\" ========================================================================
.\"
.IX Title "ENGINE 1"
.TH ENGINE 1 "2022-11-01" "1.1.1s" "OpenSSL"
.SH "NAME"
openssl\-engine, engine \- load and query engines
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
\&\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 "DESCRIPTION"
.IX Header "DESCRIPTION"
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 "OPTIONS"
.IX Header "OPTIONS"
.IP "\fB\-v\fR \fB\-vv\fR \fB\-vvv\fR \fB\-vvvv\fR" 4
.IX Item "-v -vv -vvv -vvvv"
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 "\fB\-c\fR" 4
.IX Item "-c"
Lists the capabilities of each engine.
.IP "\fB\-t\fR" 4
.IX Item "-t"
Tests if each specified engine is available, and displays the answer.
.IP "\fB\-tt\fR" 4
.IX Item "-tt"
Displays an error trace for any unavailable engine.
.IP "\fB\-pre\fR \fIcommand\fR" 4
.IX Item "-pre command"
.PD 0
.IP "\fB\-post\fR \fIcommand\fR" 4
.IX Item "-post command"
.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 "EXAMPLES"
.IX Header "EXAMPLES"
To list all the commands available to a dynamic engine:
.PP
.Vb 17
\& $ 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
.Ve
.PP
To list the capabilities of the \fIrsax\fR engine:
.PP
.Vb 4
\& $ openssl engine -c
\& (rsax) RSAX engine support
\&  [RSA]
\& (dynamic) Dynamic engine loading support
.Ve
.SH "ENVIRONMENT"
.IX Header "ENVIRONMENT"
.IP "\fB\s-1OPENSSL_ENGINES\s0\fR" 4
.IX Item "OPENSSL_ENGINES"
The path to the engines directory.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fIconfig\fR\|(5)
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2016\-2019 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the OpenSSL license (the \*(L"License\*(R").  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
<https://www.openssl.org/source/license.html>.