OPENSSL-ENGINE(1ossl) OpenSSL OPENSSL-ENGINE(1ossl) NAME openssl-engine - load and query engines SYNOPSIS openssl engine [-help] [-v] [-vv] [-vvv] [-vvvv] [-c] [-t] [-tt] [-pre com- mand] ... [-post command] ... [engine ...] DESCRIPTION This command has been deprecated. Providers should be used instead of en- gines. This command is used to query the status and capabilities of the specified engines. Engines may be specified before and after all other command-line flags. Only those specified are queried. OPTIONS -help Display an option summary. -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 descrip- tion of each command; the third adds the input flags, and the final op- tion 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. These two options are cumulative, so they may be given more than once in the same command. 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. SEE ALSO openssl(1), config(5) HISTORY This command was deprecated in OpenSSL 3.0. 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 <https://www.openssl.org/source/license.html>. 3.6.4 2026-08-25 OPENSSL-ENGINE(1ossl)
NAME | SYNOPSIS | DESCRIPTION | OPTIONS | EXAMPLES | ENVIRONMENT | SEE ALSO | HISTORY | COPYRIGHT
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