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<ul>

	<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>
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<h1><a name="name">NAME</a></h1>
<p>SSL_CTX_config, SSL_config - configure SSL_CTX or SSL structure</p>
<p>
</p>
<hr />
<h1><a name="synopsis">SYNOPSIS</a></h1>
<pre>
 #include &lt;openssl/ssl.h&gt;</pre>
<pre>
 int SSL_CTX_config(SSL_CTX *ctx, const char *name);
 int SSL_config(SSL *s, const char *name);</pre>
<p>
</p>
<hr />
<h1><a name="description">DESCRIPTION</a></h1>
<p>The functions <code>SSL_CTX_config()</code> and <code>SSL_config()</code> configure an <strong>SSL_CTX</strong> or
<strong>SSL</strong> structure using the configuration <strong>name</strong>.</p>
<p>
</p>
<hr />
<h1><a name="notes">NOTES</a></h1>
<p>By calling <code>SSL_CTX_config()</code> or <code>SSL_config()</code> 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
<code>CONF_modules_load_file()</code>. See <em>config(5)</em> for details of the configuration
file syntax.</p>
<p>
</p>
<hr />
<h1><a name="return_values">RETURN VALUES</a></h1>
<p><code>SSL_CTX_config()</code> and <code>SSL_config()</code> return 1 for success or 0 if an error
occurred.</p>
<p>
</p>
<hr />
<h1><a name="examples">EXAMPLES</a></h1>
<p>If the file &quot;config.cnf&quot; contains the following:</p>
<pre>
 testapp = test_sect</pre>
<pre>
 [test_sect]
 # list of configuration modules</pre>
<pre>
 ssl_conf = ssl_sect</pre>
<pre>
 [ssl_sect]
 server = server_section</pre>
<pre>
 [server_section]
 RSA.Certificate = server-rsa.pem
 ECDSA.Certificate = server-ecdsa.pem
 Ciphers = ALL:!RC4</pre>
<p>An application could call:</p>
<pre>
 if (CONF_modules_load_file(&quot;config.cnf&quot;, &quot;testapp&quot;, 0) &lt;= 0) {
     fprintf(stderr, &quot;Error processing config file\n&quot;);
     goto err;
 }</pre>
<pre>
 ctx = SSL_CTX_new(TLS_server_method());</pre>
<pre>
 if (SSL_CTX_config(ctx, &quot;server&quot;) == 0) {
     fprintf(stderr, &quot;Error configuring server.\n&quot;);
     goto err;
 }</pre>
<p>In this example two certificates and the cipher list are configured without
the need for any additional application code.</p>
<p>
</p>
<hr />
<h1><a name="see_also">SEE ALSO</a></h1>
<p><em>config(5)</em>,
<em>SSL_CONF_cmd(3)</em>,
<em>CONF_modules_load_file(3)</em></p>
<p>
</p>
<hr />
<h1><a name="history">HISTORY</a></h1>
<p>The <code>SSL_CTX_config()</code> and <code>SSL_config()</code> functions were added in OpenSSL 1.1.0.</p>
<p>
</p>
<hr />
<h1><a name="copyright">COPYRIGHT</a></h1>
<p>Copyright 2015-2019 The OpenSSL Project Authors. All Rights Reserved.</p>
<p>Licensed under the OpenSSL license (the &quot;License&quot;).  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>

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