=pod
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=head1 NAME
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SSL_CTX_config, SSL_config - configure SSL_CTX or SSL structure
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=head1 SYNOPSIS
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#include <openssl/ssl.h>
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int SSL_CTX_config(SSL_CTX *ctx, const char *name);
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int SSL_config(SSL *s, const char *name);
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=head1 DESCRIPTION
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The functions SSL_CTX_config() and SSL_config() configure an B<SSL_CTX> or
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B<SSL> structure using the configuration B<name>.
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=head1 NOTES
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By calling SSL_CTX_config() or SSL_config() an application can perform many
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complex tasks based on the contents of the configuration file: greatly
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simplifying application configuration code. A degree of future proofing
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can also be achieved: an application can support configuration features
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in newer versions of OpenSSL automatically.
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A configuration file must have been previously loaded, for example using
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CONF_modules_load_file(). See L<config(5)> for details of the configuration
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file syntax.
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=head1 RETURN VALUES
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SSL_CTX_config() and SSL_config() return 1 for success or 0 if an error
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occurred.
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=head1 EXAMPLES
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If the file "config.cnf" contains the following:
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testapp = test_sect
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[test_sect]
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# list of configuration modules
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ssl_conf = ssl_sect
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[ssl_sect]
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server = server_section
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[server_section]
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RSA.Certificate = server-rsa.pem
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ECDSA.Certificate = server-ecdsa.pem
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Ciphers = ALL:!RC4
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An application could call:
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if (CONF_modules_load_file("config.cnf", "testapp", 0) <= 0) {
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fprintf(stderr, "Error processing config file\n");
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goto err;
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}
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ctx = SSL_CTX_new(TLS_server_method());
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if (SSL_CTX_config(ctx, "server") == 0) {
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fprintf(stderr, "Error configuring server.\n");
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goto err;
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}
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In this example two certificates and the cipher list are configured without
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the need for any additional application code.
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=head1 SEE ALSO
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L<config(5)>,
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L<SSL_CONF_cmd(3)>,
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L<CONF_modules_load_file(3)>
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=head1 HISTORY
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The SSL_CTX_config() and SSL_config() functions were added in OpenSSL 1.1.0.
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=head1 COPYRIGHT
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Copyright 2015-2019 The OpenSSL Project Authors. All Rights Reserved.
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Licensed under the OpenSSL license (the "License"). You may not use
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this file except in compliance with the License. You can obtain a copy
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in the file LICENSE in the source distribution or at
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L<https://www.openssl.org/source/license.html>.
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=cut
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