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=pod
{- OpenSSL::safe::output_do_not_edit_headers(); -}
=head1 NAME
openssl-engine - load and query engines
=head1 SYNOPSIS
B<openssl engine>
[B<-help>]
[B<-v>]
[B<-vv>]
[B<-vvv>]
[B<-vvvv>]
[B<-c>]
[B<-t>]
[B<-tt>]
[B<-pre> I<command>] ...
[B<-post> I<command>] ...
[I<engine> ...]
=head1 DESCRIPTION
This command has been deprecated. Providers should be used instead of engines.
This command is used to query the status and capabilities
of the specified I<engine>s.
Engines may be specified before and after all other command-line flags.
Only those specified are queried.
=head1 OPTIONS
=over 4
=item B<-help>
Display an option summary.
=item B<-v> B<-vv> B<-vvv> B<-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.
=item B<-c>
Lists the capabilities of each engine.
=item B<-t>
Tests if each specified engine is available, and displays the answer.
=item B<-tt>
Displays an error trace for any unavailable engine.
=item B<-pre> I<command>
=item B<-post> I<command>
Command-line configuration of engines.
The B<-pre> command is given to the engine before it is loaded and
the B<-post> command is given after the engine is loaded.
The I<command> is of the form I<cmd>:I<val> where I<cmd> is the command,
and I<val> is the value for the command.
See the example below.
These two options are cumulative, so they may be given more than once in the
same command.
=back
=head1 EXAMPLES
To list all the commands available to a dynamic engine:
$ 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
To list the capabilities of the B<rsax> engine:
$ openssl engine -c
(rsax) RSAX engine support
[RSA]
(dynamic) Dynamic engine loading support
=head1 ENVIRONMENT
=over 4
=item B<OPENSSL_ENGINES>
The path to the engines directory.
=back
=head1 SEE ALSO
L<openssl(1)>,
L<config(5)>
=head1 HISTORY
This command was deprecated in OpenSSL 3.0.
=head1 COPYRIGHT
Copyright 2016-2020 The OpenSSL Project Authors. All Rights Reserved.
Licensed under the Apache License 2.0 (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
L<https://www.openssl.org/source/license.html>.
=cut
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