OPENSSL_CONFIG(3ossl) OpenSSL OPENSSL_CONFIG(3ossl)
NAME
OPENSSL_config, OPENSSL_no_config - simple OpenSSL configuration
functions
SYNOPSIS
#include <openssl/conf.h>
The following functions have been deprecated since OpenSSL 1.1.0, and
can be hidden entirely by defining OPENSSL_API_COMPAT with a suitable
version value, see openssl_user_macros(7):
void OPENSSL_config(const char *appname);
void OPENSSL_no_config(void);
DESCRIPTION
OPENSSL_config(3) configures OpenSSL using the standard openssl.cnf and
reads from the application section appname. If appname is NULL then the
default section, openssl_conf, will be used. Errors are silently
ignored. Multiple calls have no effect.
OPENSSL_no_config() disables configuration. If called before
OPENSSL_config(3) no configuration takes place.
If the application is built with OPENSSL_LOAD_CONF defined, then a call
to OPENSSL_config(3)
first.
NOTES
The OPENSSL_config(3) function is designed to be a very simple "call it
and forget it" function. It is however much better than nothing.
Applications which need finer control over their configuration
functionality should use the configuration functions such as
CONF_modules_load() directly. This function is deprecated and its use
should be avoided. Applications should instead call
CONF_modules_load() during initialization (that is before starting any
threads).
There are several reasons why calling the OpenSSL configuration
routines is advisable. For example, to load dynamic ENGINEs from shared
libraries (DSOs). However, very few applications currently support the
control interface and so very few can load and use dynamic ENGINEs.
Equally in future more sophisticated ENGINEs will require certain
control operations to customize them. If an application calls
OPENSSL_config(3) it doesn't need to know or care about ENGINE control
operations because they can be performed by editing a configuration
file.
ENVIRONMENT
OPENSSL_CONF
The path to the config file. Ignored in set-user-ID and set-group-
ID programs.
RETURN VALUES
Neither OPENSSL_config(3) nor OPENSSL_no_config() return a value.
SEE ALSO
config(5), CONF_modules_load_file(3)
HISTORY
The OPENSSL_config(3) functions were deprecated
in OpenSSL 1.1.0 by OPENSSL_init_crypto().
COPYRIGHT
Copyright 2004-2021 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>.
3.0.1 2021-12-14 OPENSSL_CONFIG(3ossl)
openssl 3.0.1 - Generated Wed Dec 22 11:20:59 CST 2021