ENGINE

Section: OpenSSL (1)
Updated: 2020-07-28
Page Index

NAME

openssl-engine, engine - load and query engines

SYNOPSIS

openssl engine [ engine... ] [-v] [-vv] [-vvv] [-vvv] [-vvv] [-c] [-t] [-tt] [-pre command] [-post command] [ engine... ]

DESCRIPTION

The engine command is used to query the status and capabilities of the specified engine's. Engines may be specified before and after all other command-line flags. Only those specified are queried.

OPTIONS

-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.
-c: Lists the capabilities of each engine.
-t: Tests if each specified engine is available, and displays the answer.
-tt: Displays an error trace for any unavailable engine.
-pre command
-post command: Command-line configuration of engines. The -pre command is given to the engine before it is loaded and the -post command is given after the engine is loaded. The command is of the form cmd:val where cmd is the command, and val is the value for the command. See the example below.

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 rsax engine:

 $ openssl engine -c
 (rsax) RSAX engine support
  [RSA]
 (dynamic) Dynamic engine loading support

ENVIRONMENT

OPENSSL_ENGINES: The path to the engines directory.

COPYRIGHT

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 <https://www.openssl.org/source/license.html>.