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SSL_CTX_CONFIG(3)                   OpenSSL                  SSL_CTX_CONFIG(3)
NAME
       SSL_CTX_config, SSL_config - configure SSL_CTX or SSL structure
SYNOPSIS
        #include <openssl/ssl.h>
        int SSL_CTX_config(SSL_CTX *ctx, const char *name);
        int SSL_config(SSL *s, const char *name);
DESCRIPTION
       The functions SSL_CTX_config() and SSL_config() configure an SSL_CTX or
       SSL structure using the configuration name.
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 config(5) for details of the
       configuration file syntax.
RETURN VALUES
       SSL_CTX_config() and SSL_config() return 1 for success or 0 if an error
       occurred.
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.
SEE ALSO
       config(5), SSL_CONF_cmd(3), CONF_modules_load_file(3)
HISTORY
       The SSL_CTX_config() and SSL_config() functions were added in OpenSSL
       1.1.0.
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
       <https://www.openssl.org/source/license.html>;.
1.1.1k                            2021-03-25                 SSL_CTX_CONFIG(3)