ENGINE(1SSL)                        OpenSSL                       ENGINE(1SSL)

       engine - load and query engines

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

       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.

       -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

       -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.

       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
        (dynamic) Dynamic engine loading support

       Copyright 2016 The OpenSSL Project Authors. All Rights Reserved.

       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

1.1.0f                            2017-08-08                      ENGINE(1SSL)

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