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=pod
=head1 NAME
SSL_CTX_config, SSL_config - configure SSL_CTX or SSL structure
=head1 SYNOPSIS
#include <openssl/ssl.h>
int SSL_CTX_config(SSL_CTX *ctx, const char *name);
int SSL_config(SSL *s, const char *name);
=head1 DESCRIPTION
The functions SSL_CTX_config() and SSL_config() configure an B<SSL_CTX> or
B<SSL> structure using the configuration B<name>.
=head1 NOTES
By calling SSL_CTX_config() or SSL_config() an application can perform many
complex tasks based on the contents of the configuration file: greatly
simplifying application configuration code. A degree of future proofing
can also be achieved: an application can support configuration features
in newer versions of OpenSSL automatically.
A configuration file must have been previously loaded, for example using
CONF_modules_load_file(). See L<config(5)> for details of the configuration
file syntax.
=head1 RETURN VALUES
SSL_CTX_config() and SSL_config() return 1 for success or 0 if an error
occurred.
=head1 EXAMPLES
If the file "config.cnf" contains the following:
testapp = test_sect
[test_sect]
# list of configuration modules
ssl_conf = ssl_sect
[ssl_sect]
server = server_section
[server_section]
RSA.Certificate = server-rsa.pem
ECDSA.Certificate = server-ecdsa.pem
Ciphers = ALL:!RC4
An application could call:
if (CONF_modules_load_file("config.cnf", "testapp", 0) <= 0) {
fprintf(stderr, "Error processing config file\n");
goto err;
}
ctx = SSL_CTX_new(TLS_server_method());
if (SSL_CTX_config(ctx, "server") == 0) {
fprintf(stderr, "Error configuring server.\n");
goto err;
}
In this example two certificates and the cipher list are configured without
the need for any additional application code.
=head1 SEE ALSO
L<config(5)>,
L<SSL_CONF_cmd(3)>,
L<CONF_modules_load_file(3)>
=head1 HISTORY
The SSL_CTX_config() and SSL_config() functions were added in OpenSSL 1.1.0.
=head1 COPYRIGHT
Copyright 2015-2019 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
L<https://www.openssl.org/source/license.html>.
=cut
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