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SSL_CTX_config.html
<?xml version="1.0" ?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>SSL_CTX_config</title> <meta http-equiv="content-type" content="text/html; charset=utf-8" /> <link rev="made" href="mailto:root@localhost" /> </head> <body> <ul id="index"> <li><a href="#NAME">NAME</a></li> <li><a href="#SYNOPSIS">SYNOPSIS</a></li> <li><a href="#DESCRIPTION">DESCRIPTION</a></li> <li><a href="#NOTES">NOTES</a></li> <li><a href="#RETURN-VALUES">RETURN VALUES</a></li> <li><a href="#EXAMPLES">EXAMPLES</a></li> <li><a href="#SEE-ALSO">SEE ALSO</a></li> <li><a href="#HISTORY">HISTORY</a></li> <li><a href="#COPYRIGHT">COPYRIGHT</a></li> </ul> <h1 id="NAME">NAME</h1> <p>SSL_CTX_config, SSL_config - configure SSL_CTX or SSL structure</p> <h1 id="SYNOPSIS">SYNOPSIS</h1> <pre><code> #include <openssl/ssl.h> int SSL_CTX_config(SSL_CTX *ctx, const char *name); int SSL_config(SSL *s, const char *name);</code></pre> <h1 id="DESCRIPTION">DESCRIPTION</h1> <p>The functions SSL_CTX_config() and SSL_config() configure an <b>SSL_CTX</b> or <b>SSL</b> structure using the configuration <b>name</b>.</p> <h1 id="NOTES">NOTES</h1> <p>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.</p> <p>A configuration file must have been previously loaded, for example using CONF_modules_load_file(). See <a href="../man5/config.html">config(5)</a> for details of the configuration file syntax.</p> <h1 id="RETURN-VALUES">RETURN VALUES</h1> <p>SSL_CTX_config() and SSL_config() return 1 for success or 0 if an error occurred.</p> <h1 id="EXAMPLES">EXAMPLES</h1> <p>If the file "config.cnf" contains the following:</p> <pre><code> 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</code></pre> <p>An application could call:</p> <pre><code> 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; }</code></pre> <p>In this example two certificates and the cipher list are configured without the need for any additional application code.</p> <h1 id="SEE-ALSO">SEE ALSO</h1> <p><a href="../man5/config.html">config(5)</a>, <a href="../man3/SSL_CONF_cmd.html">SSL_CONF_cmd(3)</a>, <a href="../man3/CONF_modules_load_file.html">CONF_modules_load_file(3)</a></p> <h1 id="HISTORY">HISTORY</h1> <p>The SSL_CTX_config() and SSL_config() functions were added in OpenSSL 1.1.0.</p> <h1 id="COPYRIGHT">COPYRIGHT</h1> <p>Copyright 2015-2019 The OpenSSL Project Authors. All Rights Reserved.</p> <p>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 <a href="https://www.openssl.org/source/license.html">https://www.openssl.org/source/license.html</a>.</p> </body> </html>
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