6 engine - load and query engines
26 The B<engine> command is used to query the status and capabilities
27 of the specified B<engine>'s.
28 Engines may be specified before and after all other command-line flags.
29 Only those specified are queried.
35 =item B<-v> B<-vv> B<-vvv> B<-vvvv>
37 Provides information about each specified engine. The first flag lists
38 all the possible run-time control commands; the second adds a
39 description of each command; the third adds the input flags, and the
40 final option adds the internal input flags.
44 Lists the capabilities of each engine.
48 Tests if each specified engine is available, and displays the answer.
52 Displays an error trace for any unavailable engine.
54 =item B<-pre> I<command>
56 =item B<-post> I<command>
58 Command-line configuration of engines.
59 The B<-pre> command is given to the engine before it is loaded and
60 the B<-post> command is given after the engine is loaded.
61 The I<command> is of the form I<cmd:val> where I<cmd> is the command,
62 and I<val> is the value for the command.
63 See the example below.
69 To list all the commands available to a dynamic engine:
71 $ openssl engine -t -tt -vvvv dynamic
72 (dynamic) Dynamic engine loading support
74 SO_PATH: Specifies the path to the new ENGINE shared library
76 NO_VCHECK: Specifies to continue even if version checking fails (boolean)
77 (input flags): NUMERIC
78 ID: Specifies an ENGINE id name for loading
80 LIST_ADD: Whether to add a loaded ENGINE to the internal list (0=no,1=yes,2=mandatory)
81 (input flags): NUMERIC
82 DIR_LOAD: Specifies whether to load from 'DIR_ADD' directories (0=no,1=yes,2=mandatory)
83 (input flags): NUMERIC
84 DIR_ADD: Adds a directory from which ENGINEs can be loaded
86 LOAD: Load up the ENGINE specified by other settings
87 (input flags): NO_INPUT
89 To list the capabilities of the I<rsax> engine:
92 (rsax) RSAX engine support
94 (dynamic) Dynamic engine loading support
100 =item B<OPENSSL_ENGINES>
102 The path to the engines directory.
112 Copyright 2016-2018 The OpenSSL Project Authors. All Rights Reserved.
114 Licensed under the OpenSSL license (the "License"). You may not use
115 this file except in compliance with the License. You can obtain a copy
116 in the file LICENSE in the source distribution or at
117 L<https://www.openssl.org/source/license.html>.